Begin to disentangle libxenctrl and provide some stable libraries
Subsystems (2)
PATCH v7 1/1 Begin to disentangle libxenctrl and provide some stable libraries
In <[email protected]> I proposed stabilising some parts of the libxenctrl API/ABI by disaggregating into separate libraries.
This is v7 of that set of series against:
xen
qemu-xen
qemu-xen-traditional
mini-os
NB: Samuel+minios-devel will only get the mini-os side and Stefano+qemu -devel the qemu-xen side.
The code for all repos can be found in:
git://xenbits.xen.org/people/ianc/libxenctrl-split/xen.git v7git://xenbits.xen.org/people/ianc/libxenctrl-split/qemu-xen.git v7git://xenbits.xen.org/people/ianc/libxenctrl-split/qemu-xen-traditional.git v7git://xenbits.xen.org/people/ianc/libxenctrl-split/mini-os.git v7
The tip of the xen.git branch contains an extra patch hacking Config.mk to point to all the others above, which should get the correct things for the HEAD of the branch, but not further back in time.
The new libraries here are:
* libxentoollog: Common logging infrastructure
* libxenevtchn: Userspace access to evtchns (via /dev/xen/evtchn etc)
* libxengnttab: Userspace access to grant tables (via /dev/xen/gnt??? etc)
* libxencall: Making hypercalls (i.e. the IOCTL_PRIVCMD_HYPERCALL type functionality)
* libxenforeignmemory: Privileged mappings of foreign memory (IOCTL_PRIVCMD_MMAP et al)
The first three were actually pretty distinct within libxenctrl already and have not changed in quite some time.
Although the other two are somewhat new they are based on top of long standing stable ioctls, which gives me some confidence.
Nonetheless I would appreciate extra review of at least the interface headers of all of these with a particular eye to the suitability of these interfaces being maintained in an ABI (_B_, not _P_) stable way going forward.
Still to come would be libraries for specific out of tree purposes (device model, kexec), which would be adding new library at the same level as libxc I think, rather than underneath, i.e. also using the libraries split out here, but hopefully not libxenctrl itself.
The new libraries use linker version-scripts to hopefully make future ABI changes be possible in a compatible way.
Since last time:
* Lots more docs updates based on feedback given and especially the discussion around the semantics of the libraries wrt forking without exec.
* s/gnttab_munmap/gnttab_unmap/ and s/gntshr_munmap/gntshr_unshare/ in the libxengnttab API.
* Use O_CLOEXEC on Linux and FreeBSD unconditionally.
* Fixed a stubdom/Makefile build race issue
* Dropped -pedantic from headers check, the headers in xen/include/public are not -pedantic clean, and the libraries can include headers from there (and then the check breaks).
* Dropped libxencall atform madvise thing, in favour of simpler solution of touching the pages to uncow them.
* The xentoollog patch went in but was reverted, that patch now refers to the revisions of qemu and mini-os with the corresponding changes.
Even with the dropped acks mini-os and qemu-xen-trad are fully acked, while qemu-xen and xen are mostly acked (but had a few dropped acks since last time).
The whole thing has been build tested on Linux (incl stubdoms), and on FreeBSD. I have runtime tested on Linux with qemu-xen, qemu-xen-trad and stubdoms.
Neither NetBSD nor Solaris have been tested at all. It's certainly not impossible that I've not got the #includes in the new files quite right.
http://xenbits.xen.org/people/ianc/libxenctrl-split/v7.html is the document I've been using to try and track what I'm doing. It may not be all that useful. The history of it is in the v6-with-doc branch of the xen.git linked to above.
A few of the initial patches went in, but in the meantime I discovered a wrinkle in the changes to the stubdom build changes, so now there are some new ones.
tools: Refactor "xentoollog" into its own library
went in but then came out again and is now blocking on a libvirt patch, which is in libvirt.git#master waiting to get through our libvirt push gate.
Ian.
v7 cover Begin to disentangle libxenctrl and provide some stable libraries
We intend to stabilise some parts of the libxenctrl interface by splitting out some functionality into separate stable libraries.
This is the xen part of the first phase of that change.
This mail is (or is intended to be) a reply to a "0/<VARIOUS>" super-intro mail covering all of the related patch series and which contains more details.
Ian Campbell (29):
stubdom: recurse into tools/include in mk-headers-$(XEN_TARGET_ARCH)
rule
tools: Refactor "xentoollog" into its own library tools/libxc: Remove osdep indirection for xc_evtchn
tools: Refactor /dev/xen/evtchn wrappers into libxenevtchn.
tools: Arrange to check public headers for ANSI compatiblity tools/libxc: Remove osdep indirection for xc_gnt{shr,tab}
tools: Refactor /dev/xen/gnt{dev,shr} wrappers into libxengnttab. tools/libxc: Remove osdep indirection for privcmd
tools: Refactor hypercall calling wrappers into libxencall. tools/libxc: drop xc_map_foreign_bulk_compat wrappers
tools: Remove xc_map_foreign_batch
tools: Implement xc_map_foreign_range(s) in terms of common helper
tools: Refactor foreign memory mapping into libxenforeignmemory tools/libs/foreignmemory: provide xenforeignmemory_unmap. tools/libs/foreignmemory: use size_t for size arguments. tools/libs/foreignmemory: Mention restrictions on fork in docs. tools/libs/foreignmemory: Support err == NULL to map. tools/libs/foreignmemory: pull array length argument to map forward tools/libs/evtchn: Review and update doc comments. tools/libs: Clean up hard tabs.
tools/libs/gnttab: Extensive updates to API documentation. tools/libs/call: Update some log messages to not refer to xc. tools/libs/call: Describe return values and error semantics for
xencall*
tools/libs/call: Avoid xc_memalign in netbsd and solaris backends tools/libs/call: linux: touch newly allocated pages after madvise
lockdown
tools/libs/{call,evtchn}: Document requirements around forking. tools/libs/*: Use O_CLOEXEC on Linux and FreeBSD
tools: Update CFLAGS for qemu-xen to allow it to use new libraries
HACK: Update Config.mk to pull all the right bits from my xenbits
trees
.gitignore | 10 +
Config.mk | 24 +-
config/FreeBSD.mk | 2 -
config/NetBSD.mk | 3 -
config/NetBSDRump.mk | 1 -
config/StdGNU.mk | 1 -
config/SunOS.mk | 1 -
stubdom/Makefile | 87 +-
stubdom/grub/Makefile | 1 +
tools/Makefile | 18 +-
tools/Rules.mk | 54 +-
tools/console/Makefile | 3 +-
tools/console/daemon/io.c | 64 +-
tools/console/daemon/utils.c | 1 -
tools/console/daemon/utils.h | 1 +
tools/libs/Makefile | 11 +
tools/libs/call/Makefile | 67 ++
tools/libs/call/buffer.c | 192 +++++
tools/libs/call/core.c | 147 ++++
tools/libs/call/freebsd.c | 126 +++
tools/libs/call/include/xencall.h | 127 +++
tools/libs/call/libxencall.map | 19 +
tools/libs/call/linux.c | 134 +++
tools/libs/call/minios.c | 81 ++
tools/libs/call/netbsd.c | 121 +++
tools/libs/call/private.h | 68 ++
tools/libs/call/solaris.c | 97 +++
tools/libs/evtchn/Makefile | 67 ++
tools/libs/evtchn/core.c | 72 ++
tools/libs/evtchn/freebsd.c | 138 ++++
tools/libs/evtchn/include/xenevtchn.h | 163 ++++
tools/libs/evtchn/libxenevtchn.map | 14 +
tools/libs/evtchn/linux.c | 140 ++++
tools/libs/evtchn/minios.c | 266 ++++++
tools/libs/evtchn/netbsd.c | 147 ++++
tools/libs/evtchn/private.h | 25 +
tools/libs/evtchn/solaris.c | 135 +++
tools/libs/foreignmemory/Makefile | 67 ++
tools/libs/foreignmemory/compat.c | 72 ++
tools/libs/foreignmemory/core.c | 116 +++
tools/libs/foreignmemory/freebsd.c | 115 +++
.../libs/foreignmemory/include/xenforeignmemory.h | 128 +++
tools/libs/foreignmemory/libxenforeignmemory.map | 8 +
tools/libs/foreignmemory/linux.c | 283 +++++++
tools/libs/foreignmemory/minios.c | 69 ++
tools/libs/foreignmemory/netbsd.c | 111 +++
tools/libs/foreignmemory/private.h | 54 ++
tools/libs/foreignmemory/solaris.c | 109 +++
tools/libs/gnttab/Makefile | 69 ++
tools/libs/gnttab/gntshr_core.c | 95 +++
tools/libs/gnttab/gntshr_unimp.c | 62 ++
tools/libs/gnttab/gnttab_core.c | 124 +++
tools/libs/gnttab/gnttab_unimp.c | 89 ++
tools/libs/gnttab/include/xengnttab.h | 363 +++++++++
tools/libs/gnttab/libxengnttab.map | 23 +
tools/libs/gnttab/linux.c | 335 ++++++++
tools/libs/gnttab/minios.c | 117 +++
tools/libs/gnttab/private.h | 47 ++
tools/libs/toollog/Makefile | 62 ++
tools/{libxc => libs/toollog}/include/xentoollog.h | 10 +
tools/libs/toollog/libxentoollog.map | 12 +
tools/{libxc => libs/toollog}/xtl_core.c | 10 +
tools/{libxc => libs/toollog}/xtl_logger_stdio.c | 12 +-
tools/libvchan/Makefile | 8 +-
tools/libvchan/init.c | 46 +-
tools/libvchan/io.c | 20 +-
tools/libvchan/libxenvchan.h | 9 +-
tools/libxc/Makefile | 44 +-
tools/libxc/include/xenctrl.h | 312 +------
tools/libxc/include/xenctrl_compat.h | 132 +++
tools/libxc/include/xenctrlosdep.h | 172 ----
tools/libxc/include/xenguest.h | 14 +-
tools/libxc/xc_altp2m.c | 64 +-
tools/libxc/xc_domain.c | 105 +--
tools/libxc/xc_evtchn.c | 54 +-
tools/libxc/xc_evtchn_compat.c | 75 ++
tools/libxc/xc_flask.c | 8 +-
tools/libxc/xc_foreign_memory.c | 119 +--
tools/libxc/xc_freebsd_osdep.c | 407 ----------
tools/libxc/xc_gnttab.c | 93 +--
tools/libxc/xc_gnttab_compat.c | 111 +++
tools/libxc/xc_hcall_buf.c | 138 +---
tools/libxc/xc_kexec.c | 36 +-
tools/libxc/xc_linux_osdep.c | 904 ---------------------
tools/libxc/xc_minios.c | 482 -----------
tools/libxc/xc_misc.c | 79 +-
tools/libxc/xc_netbsd.c | 345 --------
tools/libxc/xc_private.c | 277 +------
tools/libxc/xc_private.h | 105 +--
tools/libxc/xc_solaris.c | 305 -------
tools/libxc/xc_sr_restore.c | 8 +-
tools/libxc/xc_sr_save.c | 6 +-
tools/libxc/xc_suspend.c | 18 +-
tools/libxc/xc_tmem.c | 7 +-
tools/libxc/xc_vm_event.c | 20 +-
tools/libxc/xenctrl_osdep_ENOSYS.c | 210 -----
tools/libxc/xg_private.h | 3 +-
tools/libxl/Makefile | 18 +-
tools/libxl/libxl.c | 2 +-
tools/libxl/libxl_dom_suspend.c | 4 +-
tools/libxl/libxl_event.c | 14 +-
tools/libxl/libxl_internal.h | 6 +-
tools/misc/Makefile | 11 +-
tools/misc/xen-hptool.c | 13 +-
tools/misc/xen-lowmemd.c | 15 +-
tools/misc/xen-mfndump.c | 1 +
tools/ocaml/libs/eventchn/Makefile | 4 +-
tools/ocaml/libs/eventchn/xeneventchn_stubs.c | 20 +-
tools/ocaml/libs/xc/xenctrl.ml | 2 -
tools/ocaml/libs/xc/xenctrl.mli | 1 -
tools/ocaml/libs/xc/xenctrl_stubs.c | 8 +-
tools/ocaml/libs/xentoollog/Makefile | 6 +-
tools/ocaml/libs/xentoollog/genlevels.py | 2 +-
tools/ocaml/xenstored/domains.ml | 6 +-
tools/ocaml/xenstored/xenstored.ml | 5 +-
tools/python/setup.py | 10 +-
tools/python/xen/lowlevel/xc/xc.c | 2 +
tools/tests/mce-test/tools/xen-mceinj.c | 1 +
tools/tests/mem-sharing/memshrtool.c | 1 +
tools/tests/xen-access/Makefile | 3 +-
tools/tests/xen-access/xen-access.c | 21 +-
tools/xcutils/Makefile | 4 +-
tools/xenmon/Makefile | 2 +
tools/xenmon/xenbaked.c | 26 +-
tools/xenpaging/Makefile | 4 +-
tools/xenpaging/pagein.c | 1 -
tools/xenpaging/xenpaging.c | 33 +-
tools/xenpaging/xenpaging.h | 5 +-
tools/xenstore/Makefile | 7 +-
tools/xenstore/xenstored_core.c | 7 +-
tools/xenstore/xenstored_core.h | 5 +-
tools/xenstore/xenstored_domain.c | 49 +-
tools/xenstore/xenstored_minios.c | 5 +-
tools/xentrace/Makefile | 5 +-
tools/xentrace/xenctx.c | 3 +-
tools/xentrace/xentrace.c | 17 +-
136 files changed, 5967 insertions(+), 4308 deletions(-)
create mode 100644 tools/libs/Makefile
create mode 100644 tools/libs/call/Makefile
create mode 100644 tools/libs/call/buffer.c
create mode 100644 tools/libs/call/core.c
create mode 100644 tools/libs/call/freebsd.c
create mode 100644 tools/libs/call/include/xencall.h
create mode 100644 tools/libs/call/libxencall.map
create mode 100644 tools/libs/call/linux.c
create mode 100644 tools/libs/call/minios.c
create mode 100644 tools/libs/call/netbsd.c
create mode 100644 tools/libs/call/private.h
create mode 100644 tools/libs/call/solaris.c
create mode 100644 tools/libs/evtchn/Makefile
create mode 100644 tools/libs/evtchn/core.c
create mode 100644 tools/libs/evtchn/freebsd.c
create mode 100644 tools/libs/evtchn/include/xenevtchn.h
create mode 100644 tools/libs/evtchn/libxenevtchn.map
create mode 100644 tools/libs/evtchn/linux.c
create mode 100644 tools/libs/evtchn/minios.c
create mode 100644 tools/libs/evtchn/netbsd.c
create mode 100644 tools/libs/evtchn/private.h
create mode 100644 tools/libs/evtchn/solaris.c
create mode 100644 tools/libs/foreignmemory/Makefile
create mode 100644 tools/libs/foreignmemory/compat.c
create mode 100644 tools/libs/foreignmemory/core.c
create mode 100644 tools/libs/foreignmemory/freebsd.c
create mode 100644 tools/libs/foreignmemory/include/xenforeignmemory.h
create mode 100644 tools/libs/foreignmemory/libxenforeignmemory.map
create mode 100644 tools/libs/foreignmemory/linux.c
create mode 100644 tools/libs/foreignmemory/minios.c
create mode 100644 tools/libs/foreignmemory/netbsd.c
create mode 100644 tools/libs/foreignmemory/private.h
create mode 100644 tools/libs/foreignmemory/solaris.c
create mode 100644 tools/libs/gnttab/Makefile
create mode 100644 tools/libs/gnttab/gntshr_core.c
create mode 100644 tools/libs/gnttab/gntshr_unimp.c
create mode 100644 tools/libs/gnttab/gnttab_core.c
create mode 100644 tools/libs/gnttab/gnttab_unimp.c
create mode 100644 tools/libs/gnttab/include/xengnttab.h
create mode 100644 tools/libs/gnttab/libxengnttab.map
create mode 100644 tools/libs/gnttab/linux.c
create mode 100644 tools/libs/gnttab/minios.c
create mode 100644 tools/libs/gnttab/private.h
create mode 100644 tools/libs/toollog/Makefile
rename tools/{libxc => libs/toollog}/include/xentoollog.h (97%)
create mode 100644 tools/libs/toollog/libxentoollog.map
rename tools/{libxc => libs/toollog}/xtl_core.c (95%)
rename tools/{libxc => libs/toollog}/xtl_logger_stdio.c (97%)
create mode 100644 tools/libxc/include/xenctrl_compat.h
delete mode 100644 tools/libxc/include/xenctrlosdep.h
create mode 100644 tools/libxc/xc_evtchn_compat.c
delete mode 100644 tools/libxc/xc_freebsd_osdep.c
create mode 100644 tools/libxc/xc_gnttab_compat.c
delete mode 100644 tools/libxc/xc_linux_osdep.c
delete mode 100644 tools/libxc/xenctrl_osdep_ENOSYS.cSignature · 1 line
2.1.4
PATCH v7 1/29 stubdom: recurse into tools/include in mk-headers-$(XEN_TARGET_ARCH) rule
... rather than in the libxc rule.
This puts all the header dependencies in one place and will allow us to avoid races when more libraries which need these headers are introduced. I observed issues with the xen-foreign/tmp.size file getting deleted in parallel with another process trying to use it.
The mini-os links are already created in the mk-headers-$(XEN_TARGET_ARCH) target so the other places which do so are redundant, in the case of polarssl and vtpmmgr indirectly through their eventual dependency on newlib which in turn depends on mk-headers-$(XEN_TARGET_ARCH).
---
v7: New patch.
--- stubdom/Makefile | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-)
stubdom/Makefile +2 -5
@@ -304,6 +304,7 @@ ioemu/linkfarm.stamp: endif mk-headers-$(XEN_TARGET_ARCH): $(IOEMU_LINKFARM_TARGET) + $(MAKE) -C $(XEN_ROOT)/tools/include mkdir -p include/xen && \ ln -sf $(wildcard $(XEN_ROOT)/xen/include/public/*.h) include/xen && \ ln -sf $(addprefix $(XEN_ROOT)/xen/include/public/,arch-x86 hvm io xsm) include/xen && \
@@ -341,9 +342,7 @@ $(TARGETS_MINIOS): mini-os-%: .PHONY: libxc libxc: libxc-$(XEN_TARGET_ARCH)/libxenctrl.a libxc-$(XEN_TARGET_ARCH)/libxenguest.a -libxc-$(XEN_TARGET_ARCH)/libxenctrl.a: cross-zlib - $(MAKE) -C $(XEN_ROOT)/tools/include - $(MAKE) DESTDIR= -C $(MINI_OS) links +libxc-$(XEN_TARGET_ARCH)/libxenctrl.a: mk-headers-$(XEN_TARGET_ARCH) cross-zlib CPPFLAGS="$(TARGET_CPPFLAGS)" CFLAGS="$(TARGET_CFLAGS)" $(MAKE) DESTDIR= CONFIG_LIBXC_MINIOS=y -C libxc-$(XEN_TARGET_ARCH) libxc-$(XEN_TARGET_ARCH)/libxenguest.a: libxc-$(XEN_TARGET_ARCH)/libxenctrl.a
@@ -386,7 +385,6 @@ c: $(CROSS_ROOT) .PHONY: vtpm vtpm: cross-polarssl cross-tpmemu - make -C $(MINI_OS) links XEN_TARGET_ARCH="$(XEN_TARGET_ARCH)" CPPFLAGS="$(TARGET_CPPFLAGS)" CFLAGS="$(TARGET_CFLAGS)" $(MAKE) -C $@ ######
@@ -395,7 +393,6 @@ vtpm: cross-polarssl cross-tpmemu .PHONY: vtpmmgr vtpmmgr: cross-polarssl - make -C $(MINI_OS) links XEN_TARGET_ARCH="$(XEN_TARGET_ARCH)" CPPFLAGS="$(TARGET_CPPFLAGS)" CFLAGS="$(TARGET_CFLAGS)" $(MAKE) -C $@ ######
Signature · 1 line
2.1.4
Re: [PATCH XEN v7 01/29] stubdom: recurse into tools/include in mk-headers-$(XEN_TARGET_ARCH) rule
Quoted 7 lines · Ian Campbell, on Wed 16 Dec 2015 12:31:08 +0000, wrote:
... rather than in the libxc rule.
This puts all the header dependencies in one place and will allow us to avoid races when more libraries which need these headers are introduced. I observed issues with the xen-foreign/tmp.size file getting deleted in parallel with another process trying to use it.
Quoted 8 lines
The mini-os links are already created in the mk-headers-$(XEN_TARGET_ARCH) target so the other places which do so are redundant, in the case of polarssl and vtpmmgr indirectly through their eventual dependency on newlib which in turn depends on mk-headers-$(XEN_TARGET_ARCH).
Signed-off-by Ian Campbell <[email protected]>
Quoted 48 lines
---
v7: New patch.--- stubdom/Makefile | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-)stubdom/Makefile +2
-5@@ -304,6 +304,7 @@ ioemu/linkfarm.stamp: endif mk-headers-$(XEN_TARGET_ARCH): $(IOEMU_LINKFARM_TARGET) + $(MAKE) -C $(XEN_ROOT)/tools/include mkdir -p include/xen && \ ln -sf $(wildcard $(XEN_ROOT)/xen/include/public/*.h) include/xen && \ ln -sf $(addprefix $(XEN_ROOT)/xen/include/public/,arch-x86 hvm io xsm) include/xen && \@@ -341,9 +342,7 @@ $(TARGETS_MINIOS): mini-os-%: .PHONY: libxc libxc: libxc-$(XEN_TARGET_ARCH)/libxenctrl.a libxc-$(XEN_TARGET_ARCH)/libxenguest.a -libxc-$(XEN_TARGET_ARCH)/libxenctrl.a: cross-zlib - $(MAKE) -C $(XEN_ROOT)/tools/include - $(MAKE) DESTDIR= -C $(MINI_OS) links +libxc-$(XEN_TARGET_ARCH)/libxenctrl.a: mk-headers-$(XEN_TARGET_ARCH) cross-zlib CPPFLAGS="$(TARGET_CPPFLAGS)" CFLAGS="$(TARGET_CFLAGS)" $(MAKE) DESTDIR= CONFIG_LIBXC_MINIOS=y -C libxc-$(XEN_TARGET_ARCH) libxc-$(XEN_TARGET_ARCH)/libxenguest.a: libxc-$(XEN_TARGET_ARCH)/libxenctrl.a@@ -386,7 +385,6 @@ c: $(CROSS_ROOT) .PHONY: vtpm vtpm: cross-polarssl cross-tpmemu - make -C $(MINI_OS) links XEN_TARGET_ARCH="$(XEN_TARGET_ARCH)" CPPFLAGS="$(TARGET_CPPFLAGS)" CFLAGS="$(TARGET_CFLAGS)" $(MAKE) -C $@ ######@@ -395,7 +393,6 @@ vtpm: cross-polarssl cross-tpmemu .PHONY: vtpmmgr vtpmmgr: cross-polarssl - make -C $(MINI_OS) links XEN_TARGET_ARCH="$(XEN_TARGET_ARCH)" CPPFLAGS="$(TARGET_CPPFLAGS)" CFLAGS="$(TARGET_CFLAGS)" $(MAKE) -C $@ ######Signature · 1 line
2.1.4
Signature · 2 lines
Samuel <xterm> The problem with America is stupidity. I'm not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself?
Ian Campbell
AppliedRe: [PATCH XEN v7 01/29] stubdom: recurse into tools/include in mk-headers-$(XEN_TARGET_ARCH) rule
Quoted 14 lines · Samuel Thibault
Quoted 13 lines · Ian Campbell, on Wed 16 Dec 2015 12:31:08 +0000, wrote:
... rather than in the libxc rule.
This puts all the header dependencies in one place and will allow us to avoid races when more libraries which need these headers are introduced. I observed issues with the xen-foreign/tmp.size file getting deleted in parallel with another process trying to use it.
The mini-os links are already created in the mk-headers-$(XEN_TARGET_ARCH) target so the other places which do so are redundant, in the case of polarssl and vtpmmgr indirectly through their eventual dependency on newlib which in turn depends on mk-headers-$(XEN_TARGET_ARCH).
Quoted 4 lines
Quoted 2 lines
Signed-off-by Ian Campbell <[email protected]>Acked-by Samuel Thibault <[email protected]>
Thanks, applied.
Re: [PATCH XEN v7 01/29] stubdom: recurse into tools/include in mk-headers-$(XEN_TARGET_ARCH) rule
In reply to Ian CampbellQuoted 7 lines · Ian Campbell
... rather than in the libxc rule.
This puts all the header dependencies in one place and will allow us to avoid races when more libraries which need these headers are introduced. I observed issues with the xen-foreign/tmp.size file getting deleted in parallel with another process trying to use it.
Quoted 8 lines
The mini-os links are already created in the mk-headers-$(XEN_TARGET_ARCH) target so the other places which do so are redundant, in the case of polarssl and vtpmmgr indirectly through their eventual dependency on newlib which in turn depends on mk-headers-$(XEN_TARGET_ARCH).
Signed-off-by Ian Campbell <[email protected]>
PATCH v7 2/29 tools: Refactor "xentoollog" into its own library
In reply to Ian CampbellIn attempting to disaggregate libxenctrl I found that many of the pieces were going to want access to this library, so split it out (as it probably should always have been).
Various build adjustments are needed. In particular things which use xtl_* themselves now need to explicity link against the library.
This has a nice side effect which is that users of libxl no longer need to link against libxenctrl just to create a logger, which was counter to the principal that applications using libxl shouldn't be required to look behind the curtain. This means that xl no longer links against libxenctrl.
The new library uses a version script to ensure that only expected symbols are exported and to version them such that ABI guarantees can be kept in the future.
---
Must be applied with:
- "qemu-xen-traditional: Use xentoollog as a separate library" and a corresponding QEMU_TAG update folded here.
- "mini-os: Include libxentoollog with libxc" and a corresponding bump to MINIOS_UPSTREAM_REVISION folded in here.
Note that this patch was applied as c7d3afbb44b4 but reverted via ec0712576198. See
http://lists.xen.org/archives/html/xen-devel/2015-12/msg01153.html
As of v7 the QEMU_TAG and MINIOS_UPSTREAM_REVISION updates corresponding to that push are included in the patch (since the master branches of those repos has not been reverted). If those patches are subsequently reverted as described in the mail then git am will gripe about this commit.
v2: Update doc at same time
v3: Move into tools/libs/toollog.
v6: Dropped spurious debugging changes to tools/ocaml/Makefile.rules
v7: Added Config.mk update
Added mk-headers-$(XEN_TARGET_ARCH) build dependency instead of open coding the recursion.
---
.gitignore | 1 +
Config.mk | 12 ++---
stubdom/Makefile | 22 +++++++-
stubdom/grub/Makefile | 1 +
tools/Makefile | 3 ++
tools/Rules.mk | 14 +++--
tools/libs/Makefile | 7 +++
tools/libs/toollog/Makefile | 59 ++++++++++++++++++++++
tools/{libxc => libs/toollog}/include/xentoollog.h | 0
tools/libs/toollog/libxentoollog.map | 12 +++++
tools/{libxc => libs/toollog}/xtl_core.c | 0
tools/{libxc => libs/toollog}/xtl_logger_stdio.c | 0
tools/libxc/Makefile | 7 ++-
tools/libxl/Makefile | 15 +++---
tools/ocaml/libs/xentoollog/Makefile | 6 +--
tools/ocaml/libs/xentoollog/genlevels.py | 2 +-
tools/python/setup.py | 5 +-
tools/xenpaging/Makefile | 2 +-
18 files changed, 139 insertions(+), 29 deletions(-)
create mode 100644 tools/libs/Makefile
create mode 100644 tools/libs/toollog/Makefile
rename tools/{libxc => libs/toollog}/include/xentoollog.h (100%)
create mode 100644 tools/libs/toollog/libxentoollog.map
rename tools/{libxc => libs/toollog}/xtl_core.c (100%)
rename tools/{libxc => libs/toollog}/xtl_logger_stdio.c (100%).gitignore +1 -0
@@ -58,6 +58,7 @@ stubdom/gcc-* stubdom/include stubdom/ioemu stubdom/xenstore +stubdom/libxentoollog-* stubdom/libxc-* stubdom/lwip-* stubdom/mini-os-*
Config.mk +6 -6
@@ -255,9 +255,9 @@ MINIOS_UPSTREAM_URL ?= git://xenbits.xen.org/mini-os.git endif OVMF_UPSTREAM_REVISION ?= 52a99493cce88a9d4ec8a02d7f1bd1a1001ce60d QEMU_UPSTREAM_REVISION ?= master -MINIOS_UPSTREAM_REVISION ?= bccd90071e863ec22216a000f1a07035e2f226ff -# Mon Nov 23 16:34:31 2015 +0000 -# Add a .gitignore +MINIOS_UPSTREAM_REVISION ?= d25773c8afa2f4dbbb466116daeb60159ddd22bd +# Thu Dec 3 11:23:25 2015 +0000 +# mini-os: Include libxentoollog with libxc SEABIOS_UPSTREAM_REVISION ?= rel-1.9.0 # Tue Nov 17 09:18:44 2015 -0500
@@ -266,9 +266,9 @@ SEABIOS_UPSTREAM_REVISION ?= rel-1.9.0 ETHERBOOT_NICS ?= rtl8139 8086100e -QEMU_TRADITIONAL_REVISION ?= 91c15bfaec1764ce2896a393eabee1183afe1130 -# Wed Dec 9 11:47:35 2015 +0000 -# net: pcnet: add check to validate receive data size(CVE-2015-7504) +QEMU_TRADITIONAL_REVISION ?= 9fad9ed285835caef64bb8dab352e287ad8538c2 +# Thu Dec 3 11:23:16 2015 +0000 +# qemu-xen-traditional: Use xentoollog as a separate library # Specify which qemu-dm to use. This may be `ioemu' to use the old # Mercurial in-tree version, or a local directory, or a git URL.
stubdom/Makefile +21 -1
@@ -314,6 +314,11 @@ mk-headers-$(XEN_TARGET_ARCH): $(IOEMU_LINKFARM_TARGET) ln -sf $(wildcard $(XEN_ROOT)/tools/include/xen-foreign/*) include/xen-foreign/ && \ $(MAKE) DESTDIR= -C include/xen-foreign/ && \ ( [ -h include/xen/foreign ] || ln -sf ../xen-foreign include/xen/foreign ) + mkdir -p libs-$(XEN_TARGET_ARCH)/toollog + [ -h libs-$(XEN_TARGET_ARCH)/toollog/Makefile ] || ( cd libs-$(XEN_TARGET_ARCH)/toollog && \ + ln -sf $(XEN_ROOT)/tools/libs/toollog/include/*.h . && \ + ln -sf $(XEN_ROOT)/tools/libs/toollog/*.c . && \ + ln -sf $(XEN_ROOT)/tools/libs/toollog/Makefile . ) mkdir -p libxc-$(XEN_TARGET_ARCH) [ -h libxc-$(XEN_TARGET_ARCH)/Makefile ] || ( cd libxc-$(XEN_TARGET_ARCH) && \ ln -sf $(XEN_ROOT)/tools/libxc/*.h . && \
@@ -337,12 +342,21 @@ $(TARGETS_MINIOS): mini-os-%: done ####### +# libxentoollog +####### + +.PHONY: libxentoollog +libxentoollog: libs-$(XEN_TARGET_ARCH)/toollog/libxentoollog.a +libs-$(XEN_TARGET_ARCH)/toollog/libxentoollog.a: mk-headers-$(XEN_TARGET_ARCH) $(NEWLIB_STAMPFILE) + CPPFLAGS="$(TARGET_CPPFLAGS)" CFLAGS="$(TARGET_CFLAGS)" $(MAKE) DESTDIR= -C libs-$(XEN_TARGET_ARCH)/toollog + +####### # libxc ####### .PHONY: libxc libxc: libxc-$(XEN_TARGET_ARCH)/libxenctrl.a libxc-$(XEN_TARGET_ARCH)/libxenguest.a -libxc-$(XEN_TARGET_ARCH)/libxenctrl.a: mk-headers-$(XEN_TARGET_ARCH) cross-zlib +libxc-$(XEN_TARGET_ARCH)/libxenctrl.a: mk-headers-$(XEN_TARGET_ARCH) libxentoollog cross-zlib CPPFLAGS="$(TARGET_CPPFLAGS)" CFLAGS="$(TARGET_CFLAGS)" $(MAKE) DESTDIR= CONFIG_LIBXC_MINIOS=y -C libxc-$(XEN_TARGET_ARCH) libxc-$(XEN_TARGET_ARCH)/libxenguest.a: libxc-$(XEN_TARGET_ARCH)/libxenctrl.a
@@ -512,6 +526,11 @@ clean: $(MAKE) -C vtpmmgr clean rm -fr grub-$(XEN_TARGET_ARCH) rm -f $(STUBDOMPATH) + [ ! -e libs-$(XEN_TARGET_ARCH)/toollog/Makefile ] || $(MAKE) DESTDIR= -C libs-$(XEN_TARGET_ARCH)/toollog clean + [ ! -e libs-$(XEN_TARGET_ARCH)/evtchn/Makefile ] || $(MAKE) DESTDIR= -C libs-$(XEN_TARGET_ARCH)/evtchn clean + [ ! -e libs-$(XEN_TARGET_ARCH)/gnttab/Makefile ] || $(MAKE) DESTDIR= -C libs-$(XEN_TARGET_ARCH)/gnttab clean + [ ! -e libs-$(XEN_TARGET_ARCH)/call/Makefile ] || $(MAKE) DESTDIR= -C libs-$(XEN_TARGET_ARCH)/call clean + [ ! -e libs-$(XEN_TARGET_ARCH)/foreignmemory/Makefile ] || $(MAKE) DESTDIR= -C libs-$(XEN_TARGET_ARCH)/foreignmemory clean [ ! -e libxc-$(XEN_TARGET_ARCH)/Makefile ] || $(MAKE) DESTDIR= -C libxc-$(XEN_TARGET_ARCH) clean -[ ! -d ioemu ] || $(MAKE) DESTDIR= -C ioemu clean -[ ! -d xenstore ] || $(MAKE) DESTDIR= -C xenstore clean
@@ -522,6 +541,7 @@ crossclean: clean rm -fr $(CROSS_ROOT) rm -fr newlib-$(XEN_TARGET_ARCH) rm -fr zlib-$(XEN_TARGET_ARCH) pciutils-$(XEN_TARGET_ARCH) + rm -fr libs-$(XEN_TARGET_ARCH) rm -fr libxc-$(XEN_TARGET_ARCH) ioemu xenstore rm -fr gmp-$(XEN_TARGET_ARCH) rm -fr polarssl-$(XEN_TARGET_ARCH)
stubdom/grub/Makefile +1 -0
@@ -5,6 +5,7 @@ vpath %.c ../grub-upstream BOOT=$(OBJ_DIR)/boot-$(XEN_TARGET_ARCH).o +DEF_CPPFLAGS += -I$(XEN_ROOT)/tools/libs/toollog/include DEF_CPPFLAGS += -I$(XEN_ROOT)/tools/libxc/include -I$(XEN_ROOT)/tools/include -I. DEF_CPPFLAGS += -I../grub-upstream/stage1 DEF_CPPFLAGS += -I../grub-upstream/stage2
tools/Makefile +3 -0
@@ -3,6 +3,7 @@ include $(XEN_ROOT)/tools/Rules.mk SUBDIRS-y := SUBDIRS-y += include +SUBDIRS-y += libs SUBDIRS-y += libxc SUBDIRS-$(FLASK_ENABLE) += flask SUBDIRS-y += xenstore
@@ -248,12 +249,14 @@ subdir-all-qemu-xen-dir: qemu-xen-dir-find --includedir=$(LIBEXEC_INC) \ --source-path=$$source \ --extra-cflags="-I$(XEN_ROOT)/tools/include \ + -I$(XEN_ROOT)/tools/libs/toollog/include \ -I$(XEN_ROOT)/tools/libxc/include \ -I$(XEN_ROOT)/tools/xenstore/include \ -I$(XEN_ROOT)/tools/xenstore/compat/include \ $(EXTRA_CFLAGS_QEMU_XEN)" \ --extra-ldflags="-L$(XEN_ROOT)/tools/libxc \ -L$(XEN_ROOT)/tools/xenstore \ + -Wl,-rpath-link=$(XEN_ROOT)/tools/libs/toollog \ $(QEMU_UPSTREAM_RPATH)" \ --bindir=$(LIBEXEC_BIN) \ --datadir=$(SHAREDIR)/qemu-xen \
tools/Rules.mk +10 -4
@@ -10,6 +10,7 @@ export _INSTALL := $(INSTALL) INSTALL = $(XEN_ROOT)/tools/cross-install XEN_INCLUDE = $(XEN_ROOT)/tools/include +XEN_LIBXENTOOLLOG = $(XEN_ROOT)/tools/libs/toollog XEN_LIBXC = $(XEN_ROOT)/tools/libxc XEN_XENLIGHT = $(XEN_ROOT)/tools/libxl XEN_XENSTORE = $(XEN_ROOT)/tools/xenstore
@@ -76,10 +77,15 @@ endif # Consumers of libfoo should not directly use $(SHDEPS_libfoo) or # $(SHLIB_libfoo) -CFLAGS_libxenctrl = -I$(XEN_LIBXC)/include $(CFLAGS_xeninclude) -SHDEPS_libxenctrl = -LDLIBS_libxenctrl = $(XEN_LIBXC)/libxenctrl$(libextension) -SHLIB_libxenctrl = -Wl,-rpath-link=$(XEN_LIBXC) +CFLAGS_libxentoollog = -I$(XEN_LIBXENTOOLLOG)/include $(CFLAGS_xeninclude) +SHDEPS_libxentoollog = +LDLIBS_libxentoollog = $(XEN_LIBXENTOOLLOG)/libxentoollog$(libextension) +SHLIB_libxentoollog = -Wl,-rpath-link=$(XEN_LIBXENTOOLLOG) + +CFLAGS_libxenctrl = -I$(XEN_LIBXC)/include $(CFLAGS_libxentoollog) $(CFLAGS_xeninclude) +SHDEPS_libxenctrl = $(SHLIB_libxentoollog) +LDLIBS_libxenctrl = $(SHDEPS_libxenctrl) $(XEN_LIBXC)/libxenctrl$(libextension) +SHLIB_libxenctrl = $(SHDEPS_libxenctrl) -Wl,-rpath-link=$(XEN_LIBXC) CFLAGS_libxenguest = -I$(XEN_LIBXC)/include $(CFLAGS_xeninclude) SHDEPS_libxenguest =
tools/libs/Makefile new file +7 -0
@@ -0,0 +1,7 @@ +XEN_ROOT = $(CURDIR)/../.. +include $(XEN_ROOT)/tools/Rules.mk + +SUBDIRS-y := +SUBDIRS-y += toollog + +all clean install distclean: %: subdirs-%
tools/libs/toollog/Makefile new file +59 -0
59 lines not on this page · raw message
tools/libs/toollog/include/xentoollog.h renamed from tools/libxc/include/xentoollog.h +0 -0
tools/libs/toollog/libxentoollog.map new file +12 -0
@@ -0,0 +1,12 @@ +VERS_1.0 { + global: + xtl_createlogger_stdiostream; + xtl_level_to_string; + xtl_log; + xtl_logger_destroy; + xtl_logv; + xtl_progress; + xtl_stdiostream_adjust_flags; + xtl_stdiostream_set_minlevel; + local: *; /* Do not expose anything by default */ +};
tools/libs/toollog/xtl_core.c renamed from tools/libxc/xtl_core.c +0 -0
tools/libs/toollog/xtl_logger_stdio.c renamed from tools/libxc/xtl_logger_stdio.c +0 -0
tools/libxc/Makefile +3 -4
@@ -39,8 +39,6 @@ CTRL_SRCS-y += xc_memshr.c CTRL_SRCS-y += xc_hcall_buf.c CTRL_SRCS-y += xc_foreign_memory.c CTRL_SRCS-y += xc_kexec.c -CTRL_SRCS-y += xtl_core.c -CTRL_SRCS-y += xtl_logger_stdio.c CTRL_SRCS-y += xc_resource.c CTRL_SRCS-$(CONFIG_X86) += xc_psr.c CTRL_SRCS-$(CONFIG_X86) += xc_pagetab.c
@@ -112,6 +110,7 @@ CFLAGS += -I. -I./include $(CFLAGS_xeninclude) CFLAGS-$(CONFIG_Linux) += -D_GNU_SOURCE CFLAGS += $(PTHREAD_CFLAGS) +CFLAGS += $(CFLAGS_libxentoollog) CTRL_LIB_OBJS := $(patsubst %.c,%.o,$(CTRL_SRCS-y)) CTRL_PIC_OBJS := $(patsubst %.c,%.opic,$(CTRL_SRCS-y))
@@ -165,7 +164,7 @@ install: build $(INSTALL_DATA) libxenctrl.a $(DESTDIR)$(libdir) $(SYMLINK_SHLIB) libxenctrl.so.$(MAJOR).$(MINOR) $(DESTDIR)$(libdir)/libxenctrl.so.$(MAJOR) $(SYMLINK_SHLIB) libxenctrl.so.$(MAJOR) $(DESTDIR)$(libdir)/libxenctrl.so - $(INSTALL_DATA) include/xenctrl.h include/xenctrlosdep.h include/xentoollog.h $(DESTDIR)$(includedir) + $(INSTALL_DATA) include/xenctrl.h include/xenctrlosdep.h $(DESTDIR)$(includedir) $(INSTALL_SHLIB) libxenguest.so.$(MAJOR).$(MINOR) $(DESTDIR)$(libdir) $(INSTALL_DATA) libxenguest.a $(DESTDIR)$(libdir) $(SYMLINK_SHLIB) libxenguest.so.$(MAJOR).$(MINOR) $(DESTDIR)$(libdir)/libxenguest.so.$(MAJOR)
@@ -208,7 +207,7 @@ libxenctrl.so.$(MAJOR): libxenctrl.so.$(MAJOR).$(MINOR) $(SYMLINK_SHLIB) $< $@ libxenctrl.so.$(MAJOR).$(MINOR): $(CTRL_PIC_OBJS) - $(CC) $(LDFLAGS) $(PTHREAD_LDFLAGS) -Wl,$(SONAME_LDFLAG) -Wl,libxenctrl.so.$(MAJOR) $(SHLIB_LDFLAGS) -o $@ $^ $(DLOPEN_LIBS) $(PTHREAD_LIBS) $(APPEND_LDFLAGS) + $(CC) $(LDFLAGS) $(PTHREAD_LDFLAGS) -Wl,$(SONAME_LDFLAG) -Wl,libxenctrl.so.$(MAJOR) $(SHLIB_LDFLAGS) -o $@ $^ $(LDLIBS_libxentoollog) $(DLOPEN_LIBS) $(PTHREAD_LIBS) $(APPEND_LDFLAGS) # libxenguest
tools/libxl/Makefile +8 -7
@@ -20,11 +20,12 @@ LIBUUID_LIBS += -luuid endif LIBXL_LIBS = -LIBXL_LIBS = $(LDLIBS_libxenctrl) $(LDLIBS_libxenguest) $(LDLIBS_libxenstore) $(LDLIBS_libblktapctl) $(PTYFUNCS_LIBS) $(LIBUUID_LIBS) +LIBXL_LIBS = $(LDLIBS_libxentoollog) $(LDLIBS_libxenctrl) $(LDLIBS_libxenguest) $(LDLIBS_libxenstore) $(LDLIBS_libblktapctl) $(PTYFUNCS_LIBS) $(LIBUUID_LIBS) ifeq ($(CONFIG_REMUS_NETBUF),y) LIBXL_LIBS += $(LIBNL3_LIBS) endif +CFLAGS_LIBXL += $(CFLAGS_libxentoollog) CFLAGS_LIBXL += $(CFLAGS_libxenctrl) CFLAGS_LIBXL += $(CFLAGS_libxenguest) CFLAGS_LIBXL += $(CFLAGS_libxenstore)
@@ -149,7 +150,7 @@ CFLAGS_XL += -Wshadow XL_OBJS = xl.o xl_cmdimpl.o xl_cmdtable.o xl_sxp.o $(XL_OBJS) $(TEST_PROG_OBJS) _libxl.api-for-check: \ - CFLAGS += $(CFLAGS_libxenctrl) # For xentoollog.h + CFLAGS += $(CFLAGS_libxentoollog) $(XL_OBJS): CFLAGS += $(CFLAGS_XL) $(XL_OBJS): CFLAGS += -include $(XEN_ROOT)/tools/config.h # libxl_json.h needs it.
@@ -253,19 +254,19 @@ libxlutil.a: $(LIBXLU_OBJS) $(AR) rcs libxlutil.a $^ xl: $(XL_OBJS) libxlutil.so libxenlight.so - $(CC) $(LDFLAGS) -o $@ $(XL_OBJS) libxlutil.so $(LDLIBS_libxenlight) $(LDLIBS_libxenctrl) -lyajl $(APPEND_LDFLAGS) + $(CC) $(LDFLAGS) -o $@ $(XL_OBJS) libxlutil.so $(LDLIBS_libxenlight) $(LDLIBS_libxentoollog) -lyajl $(APPEND_LDFLAGS) xen-init-dom0: $(XEN_INIT_DOM0_OBJS) libxenlight.so - $(CC) $(LDFLAGS) -o $@ $(XEN_INIT_DOM0_OBJS) $(LDLIBS_libxenstore) $(LDLIBS_libxenlight) $(LDLIBS_libxenctrl) $(APPEND_LDFLAGS) + $(CC) $(LDFLAGS) -o $@ $(XEN_INIT_DOM0_OBJS) $(LDLIBS_libxenstore) $(LDLIBS_libxenlight) $(LDLIBS_libxentoollog) $(APPEND_LDFLAGS) test_%: test_%.o test_common.o libxlutil.so libxenlight_test.so - $(CC) $(LDFLAGS) -o $@ $^ $(filter-out %libxenlight.so, $(LDLIBS_libxenlight)) $(LDLIBS_libxenctrl) -lyajl $(APPEND_LDFLAGS) + $(CC) $(LDFLAGS) -o $@ $^ $(filter-out %libxenlight.so, $(LDLIBS_libxenlight)) $(LDLIBS_libxentoollog) -lyajl $(APPEND_LDFLAGS) libxl-save-helper: $(SAVE_HELPER_OBJS) libxenlight.so - $(CC) $(LDFLAGS) -o $@ $(SAVE_HELPER_OBJS) $(LDLIBS_libxenctrl) $(LDLIBS_libxenguest) $(APPEND_LDFLAGS) + $(CC) $(LDFLAGS) -o $@ $(SAVE_HELPER_OBJS) $(LDLIBS_libxentoollog) $(LDLIBS_libxenctrl) $(LDLIBS_libxenguest) $(APPEND_LDFLAGS) testidl: testidl.o libxlutil.so libxenlight.so - $(CC) $(LDFLAGS) -o $@ testidl.o libxlutil.so $(LDLIBS_libxenlight) $(LDLIBS_libxenctrl) $(APPEND_LDFLAGS) + $(CC) $(LDFLAGS) -o $@ testidl.o libxlutil.so $(LDLIBS_libxenlight) $(LDLIBS_libxentoollog) $(APPEND_LDFLAGS) $(PKG_CONFIG): % : %.in Makefile @sed -e 's/@@version@@/$(MAJOR).$(MINOR)/g' < $< > [email protected]
tools/ocaml/libs/xentoollog/Makefile +3 -3
@@ -5,7 +5,7 @@ include $(TOPLEVEL)/common.make # allow mixed declarations and code CFLAGS += -Wno-declaration-after-statement -CFLAGS += $(CFLAGS_libxenctrl) $(CFLAGS_libxenguest) +CFLAGS += $(CFLAGS_libxentoollog) CFLAGS += $(APPEND_CFLAGS) OCAMLINCLUDE +=
@@ -13,7 +13,7 @@ OBJS = xentoollog INTF = xentoollog.cmi LIBS = xentoollog.cma xentoollog.cmxa -LIBS_xentoollog = $(LDLIBS_libxenctrl) +LIBS_xentoollog = $(LDLIBS_libxentoollog) xentoollog_OBJS = $(OBJS) xentoollog_C_OBJS = xentoollog_stubs
@@ -49,7 +49,7 @@ xentoollog.mli: xentoollog.mli.in _xtl_levels.mli.in libs: $(LIBS) -_xtl_levels.ml.in _xtl_levels.mli.in _xtl_levels.inc: genlevels.py $(XEN_ROOT)/tools/libxc/include/xentoollog.h +_xtl_levels.ml.in _xtl_levels.mli.in _xtl_levels.inc: genlevels.py $(XEN_ROOT)/tools/libs/toollog/include/xentoollog.h $(PYTHON) genlevels.py _xtl_levels.mli.in _xtl_levels.ml.in _xtl_levels.inc .PHONY: install
tools/ocaml/libs/xentoollog/genlevels.py +1 -1
@@ -3,7 +3,7 @@ import sys def read_levels(): - f = open('../../../libxc/include/xentoollog.h', 'r') + f = open('../../../libs/toollog/include/xentoollog.h', 'r') levels = [] record = False
tools/python/setup.py +3 -2
@@ -7,16 +7,17 @@ XEN_ROOT = "../.." extra_compile_args = [ "-fno-strict-aliasing", "-Werror" ] PATH_XEN = XEN_ROOT + "/tools/include" +PATH_LIBXENTOOLLOG = XEN_ROOT + "/tools/libs/toollog" PATH_LIBXC = XEN_ROOT + "/tools/libxc" PATH_LIBXL = XEN_ROOT + "/tools/libxl" PATH_XENSTORE = XEN_ROOT + "/tools/xenstore" xc = Extension("xc", extra_compile_args = extra_compile_args, - include_dirs = [ PATH_XEN, PATH_LIBXC + "/include", "xen/lowlevel/xc" ], + include_dirs = [ PATH_XEN, PATH_LIBXENTOOLLOG + "/include", PATH_LIBXC + "/include", "xen/lowlevel/xc" ], library_dirs = [ PATH_LIBXC ], libraries = [ "xenctrl", "xenguest" ], - depends = [ PATH_LIBXC + "/libxenctrl.so", PATH_LIBXC + "/libxenguest.so" ], + depends = [ PATH_LIBXC + "/libxenctrl.so", PATH_LIBXC + "/libxenguest.so", "-Wl,-rpath-link="+PATH_LIBXENTOOLLOG ], sources = [ "xen/lowlevel/xc/xc.c" ]) xs = Extension("xs",
tools/xenpaging/Makefile +1 -1
@@ -3,7 +3,7 @@ include $(XEN_ROOT)/tools/Rules.mk # xenpaging.c and file_ops.c incorrectly use libxc internals CFLAGS += $(CFLAGS_libxenctrl) $(CFLAGS_libxenstore) $(PTHREAD_CFLAGS) -I$(XEN_ROOT)/tools/libxc -LDLIBS += $(LDLIBS_libxenctrl) $(LDLIBS_libxenstore) $(PTHREAD_LIBS) +LDLIBS += $(LDLIBS_libxentoollog) $(LDLIBS_libxenctrl) $(LDLIBS_libxenstore) $(PTHREAD_LIBS) LDFLAGS += $(PTHREAD_LDFLAGS) POLICY = default
Signature · 1 line
2.1.4
Re: [PATCH XEN v7 02/29] tools: Refactor "xentoollog" into its own library
Quoted 23 lines · Ian Campbell
In attempting to disaggregate libxenctrl I found that many of the pieces were going to want access to this library, so split it out (as it probably should always have been).
Various build adjustments are needed. In particular things which use xtl_* themselves now need to explicity link against the library.
This has a nice side effect which is that users of libxl no longer need to link against libxenctrl just to create a logger, which was counter to the principal that applications using libxl shouldn't be required to look behind the curtain. This means that xl no longer links against libxenctrl.
The new library uses a version script to ensure that only expected symbols are exported and to version them such that ABI guarantees can be kept in the future.
Signed-off-by Ian Campbell <[email protected]>Acked-by Ian Jackson <[email protected]>Acked-by Wei Liu <[email protected]>---
Must be applied with:
Quoted 8 lines
- "qemu-xen-traditional: Use xentoollog as a separate library" and a corresponding
QEMU_TAGupdate folded here.
- "mini-os: Include libxentoollog with libxc" and a corresponding bump toMINIOS_UPSTREAM_REVISIONfolded in here.Note that this patch was applied as
c7d3afbb44b4but reverted viaec0712576198. See
http://lists.xen.org/archives/html/xen-devel/2015-12/msg01153.html
The corresponding libvirt support for this change was added to libvirt.git in 716be2570a38bc92581e31e3fec6b1ca92302c1e
Author: Ian Campbell <[email protected]>
Date: Thu Dec 10 11:38:36 2015 +0000
libxl: Use libxentoollog in preference to libxenctrl if available.
The contents of our output libvirt push gate is now d5a0cf10 which is after that change.
Therefore I have reapplied.
Quoted 5 lines
As of v7 the
QEMU_TAGandMINIOS_UPSTREAM_REVISIONupdates corresponding to that push are included in the patch (since the master branches of those repos has not been reverted). If those patches are subsequently reverted as described in the mail then git am will gripe about this commit.
MINIOS_UPSTREAM_REVISION was unchanged in the interim.
QEMU_TRADITION_REVISION had since progressed to 569eac99e8dd which is after 9fad9ed28583, the commit needed here so I have dropped that hunk. Note that 9fad9ed28583 turned out to be harmless even without the corresponding xen.git change (this patch) since all it did was add until now non-existent
path to the include path and rpath-link.
Ian.
_______________________________________________
Xen-devel mailing list
[email protected]
http://lists.xen.org/xen-devel
PATCH v7 3/29 tools/libxc: Remove osdep indirection for xc_evtchn
In reply to Ian CampbellThe alternative backend (a xen-api/xapi shim) is no longer around and so this stuff is now just baggage which is getting in the way of refactoring libxenctrl.
Note that the intention is to move this into a separate library shortly.
Nested virt probably suffices for this use case now.
One incorrect instance of using xc_interface where xc_evtchn (in ocaml stubs) is removed, this used to work because they were typedefs to the same struct, but is no longer permitted.
--- tools/libxc/include/xenctrl.h | 2 +- tools/libxc/include/xenctrlosdep.h | 16 ----- tools/libxc/xc_evtchn.c | 45 -------------- tools/libxc/xc_freebsd_osdep.c | 79 ++++++++---------------- tools/libxc/xc_linux_osdep.c | 76 +++++++++-------------- tools/libxc/xc_minios.c | 63 ++++++++----------- tools/libxc/xc_netbsd.c | 72 ++++++++-------------- tools/libxc/xc_private.c | 37 +++++++++--- tools/libxc/xc_private.h | 17 ++++++ tools/libxc/xc_solaris.c | 71 ++++++++-------------- tools/libxc/xenctrl_osdep_ENOSYS.c | 87 --------------------------- tools/ocaml/libs/eventchn/xeneventchn_stubs.c | 4 +- 12 files changed, 180 insertions(+), 389 deletions(-)
tools/libxc/include/xenctrl.h +1 -1
@@ -117,7 +117,7 @@*/ typedef struct xc_interface_core xc_interface ; -typedef struct xc_interface_core xc_evtchn ; +typedef struct xenevtchn_handle xc_evtchn ;typedef struct xc_interface_core xc_gnttab ;typedef struct xc_interface_core xc_gntshr ;
tools/libxc/include/xenctrlosdep.h +0 -16
@@ -51,7 +51,6 @@enum xc_osdep_type {XC_OSDEP_PRIVCMD , -XC_OSDEP_EVTCHN ,XC_OSDEP_GNTTAB ,XC_OSDEP_GNTSHR , };
@@ -90,21 +89,6 @@ struct xc_osdep_ops int nentries); } privcmd;struct { -int (*fd)(xc_evtchn *xce,xc_osdep_handle h); - -int (*notify)(xc_evtchn *xce,xc_osdep_handle h,evtchn_port_t port); - -evtchn_port_or_error_t (*bind_unbound_port)(xc_evtchn *xce,xc_osdep_handle h,int domid); -evtchn_port_or_error_t (*bind_interdomain)(xc_evtchn *xce,xc_osdep_handle h,int domid, -evtchn_port_t remote_port); -evtchn_port_or_error_t (*bind_virq)(xc_evtchn *xce,xc_osdep_handle h,unsigned int virq); - -int (*unbind)(xc_evtchn *xce,xc_osdep_handle h,evtchn_port_t port); - -evtchn_port_or_error_t (*pending)(xc_evtchn *xce,xc_osdep_handle h); -int (*unmask)(xc_evtchn *xce,xc_osdep_handle h,evtchn_port_t port); - } evtchn; -struct {#define XC_GRANT_MAP_SINGLE_DOMAIN 0x1 void *(*grant_map)(xc_gnttab *xcg, xc_osdep_handle h, uint32_t count, int flags, int prot,
tools/libxc/xc_evtchn.c +0 -45
51 lines not on this page · raw message
tools/libxc/xc_freebsd_osdep.c +26 -53
152 lines not on this page · raw message
tools/libxc/xc_linux_osdep.c +28 -48
155 lines not on this page · raw message
tools/libxc/xc_minios.c +24 -39
138 lines not on this page · raw message
tools/libxc/xc_netbsd.c +26 -46
141 lines not on this page · raw message
tools/libxc/xc_private.c +30 -7
@@ -119,7 +119,6 @@ static const char *xc_osdep_type_name(enum xc_osdep_type type)switch ( type ) {case XC_OSDEP_PRIVCMD :return "privcmd" ; -case XC_OSDEP_EVTCHN :return "evtchn" ;case XC_OSDEP_GNTTAB :return "gnttab" ;case XC_OSDEP_GNTSHR :return "gntshr" ; }
@@ -252,20 +251,44 @@ int do_xen_hypercall(xc_interface *xch, privcmd_hypercall_t *hypercall)return xch->ops->u.privcmd.hypercall (xch, xch->ops_handle, hypercall); } -xc_evtchn *xc_evtchn_open (xentoollog_logger *logger, -unsigned open_flags) +xc_evtchn *xc_evtchn_open (xentoollog_logger *logger,unsigned open_flags) { -xc_evtchn *xce; +xc_evtchn *xce =malloc (sizeof (*xce)); +int rc; + +if (!xce)return NULL ; + + xce->fd =-1 ; + xce->logger = logger; + xce->logger_tofree =NULL ; - xce =xc_interface_open_common (logger,NULL , open_flags, -XC_OSDEP_EVTCHN ); +if (!xce->logger) { + xce->logger = xce->logger_tofree = + (xentoollog_logger *) +xtl_createlogger_stdiostream (stderr,XTL_PROGRESS ,0 ); +if (!xce->logger) goto err; + } + + rc =osdep_evtchn_open (xce); +if ( rc <0 ) goto err;return xce; + +err: +osdep_evtchn_close (xce); +xtl_logger_destroy (xce->logger_tofree); +free (xce); +return NULL ; }int xc_evtchn_close (xc_evtchn *xce) { -return xc_interface_close_common (xce); +int rc; + + rc =osdep_evtchn_close (xce); +xtl_logger_destroy (xce->logger_tofree); +free (xce); +return rc; } xc_gnttab *xc_gnttab_open(xentoollog_logger *logger,
tools/libxc/xc_private.h +17 -0
@@ -123,6 +123,13 @@ struct xc_interface_core {xc_osdep_handle ops_handle;/* opaque data for xc_osdep_ops */ }; +struct xenevtchn_handle { +xentoollog_logger *logger, *logger_tofree; +int fd; +}; +int osdep_evtchn_open (xc_evtchn *xce); +int osdep_evtchn_close (xc_evtchn *xce); +void xc_report_error (xc_interface *xch,int code,const char *fmt, ...) __attribute__((format (printf,3 ,4 ))); void xc_reportv(xc_interface *xch, xentoollog_logger *lg, xentoollog_level,
@@ -446,3 +453,13 @@ void *xc_vm_event_enable(xc_interface *xch, domid_t domain_id, int param, uint32_t *port);#endif /* __XC_PRIVATE_H__ */ + +/* +* Local variables: +* mode: C +* c-file-style: "BSD" +* c-basic-offset: 4 +* tab-width: 4 +* indent-tabs-mode: nil +* End: +*/
tools/libxc/xc_solaris.c +26 -45
145 lines not on this page · raw message
tools/libxc/xenctrl_osdep_ENOSYS.c +0 -87
99 lines not on this page · raw message
tools/ocaml/libs/eventchn/xeneventchn_stubs.c +2 -2
@@ -34,14 +34,14 @@#include <caml/callback.h> #include <caml/fail.h> -#define _H (__h) ((xc_interface *)(__h)) +#define _H (__h) ((xc_evtchn *)(__h)) CAMLprim value stub_eventchn_init(void) {CAMLparam0 ();CAMLlocal1 (result); -xc_interface *xce =xc_evtchn_open (NULL ,XC_OPENFLAG_NON_REENTRANT ); +xc_evtchn *xce =xc_evtchn_open (NULL ,XC_OPENFLAG_NON_REENTRANT );if (xce ==NULL )caml_failwith ("open failed" );
Signature · 1 line
2.1.4
PATCH v7 4/29 tools: Refactor /dev/xen/evtchn wrappers into libxenevtchn.
In reply to Ian Campbelllibxenevtchn will provide a stable API and ABI for accessing the evtchn device.
The functions are moved into the xenevtchn namespace to make a clean break from libxc and avoid ambiguity regarding which interfaces are stable.
All in-tree users are updated to use the new names.
Upon request (via #define XC_WANT_COMPAT_EVTCHN_API) libxenctrl will provide a compat API for the old names. This is used by qemu-xen for the time being. qemu-xen-traditional is updated in lockstep.
This leaves a few event channel related functions which go via privcmd (EVTCHNOP) rather than ioctls on the /dev/xen/evtchn device in libxenctrl. Specifically:
- xc_evtchn_alloc_unbound
- xc_evtchn_reset
- xc_evtchn_status
Note that xc_evtchn_alloc_unbound's functionality is also provided by xenevtchn_bind_unbound_port() (née xc_evtchn_bind_unbound_port) and is probably redundant.
These functions do not appear to be needed by qemu-dm, qemu-pv (provision of device model to HVM guests and PV backends respectively) or by libvchan suggesting they are not needed by non-toolstack uses of event channels. QEMU does use these in hw/xenpv/xen_domainbuild.c but that is a "toolstack use".
The new library uses a version script to ensure that only expected symbols are exported and to version them such that ABI guarantees can be kept in the future.
---
Must be applied with:
- "qemu-xen-traditional: Use libxenevtchn" and a corresponding QEMU_TAG update folded here.
- "mini-os: Include libxenevtchn with libxc"" and a corresponding bump to MINIOS_UPSTREAM_REVISION folded in here.
v2: Update doc at same time
Removed some stray compat thing
v3: Moved to tools/libs/evtchn
v4: typedef the xenevtchn_handle in xenguest.h instead of #include, to
avoid leaking the libxenevtchn namespace into callers who may not want it. (And also to avoid adding lots of -I to places like stubdom builds)
v5: Handle NULL passed to _close()
v6: Properly port xen-access to new API (instead of a single function call)
v7: Added mk-headers-$(XEN_TARGET_ARCH) build dependency instead of
open coding the recursion.
--- .gitignore | 1 + stubdom/Makefile | 17 +- tools/Makefile | 5 +- tools/Rules.mk | 14 +- tools/console/Makefile | 2 + tools/console/daemon/io.c | 43 ++-- tools/libs/Makefile | 1 + tools/libs/evtchn/Makefile | 65 +++++++ tools/libs/evtchn/core.c | 72 +++++++ tools/libs/evtchn/freebsd.c | 138 +++++++++++++ tools/libs/evtchn/include/xenevtchn.h | 150 ++++++++++++++ tools/libs/evtchn/libxenevtchn.map | 14 ++ tools/libs/evtchn/linux.c | 136 +++++++++++++ tools/libs/evtchn/minios.c | 269 ++++++++++++++++++++++++++ tools/libs/evtchn/netbsd.c | 147 ++++++++++++++ tools/libs/evtchn/private.h | 25 +++ tools/libs/evtchn/solaris.c | 135 +++++++++++++ tools/libs/toollog/include/xentoollog.h | 10 + tools/libs/toollog/xtl_core.c | 10 + tools/libs/toollog/xtl_logger_stdio.c | 10 + tools/libvchan/Makefile | 6 +- tools/libvchan/init.c | 20 +- tools/libvchan/io.c | 12 +- tools/libvchan/libxenvchan.h | 3 +- tools/libxc/Makefile | 8 +- tools/libxc/include/xenctrl.h | 99 +--------- tools/libxc/include/xenctrl_compat.h | 48 +++++ tools/libxc/include/xenguest.h | 14 +- tools/libxc/xc_evtchn_compat.c | 75 +++++++ tools/libxc/xc_freebsd_osdep.c | 101 ---------- tools/libxc/xc_linux_osdep.c | 95 --------- tools/libxc/xc_minios.c | 221 --------------------- tools/libxc/xc_netbsd.c | 109 ----------- tools/libxc/xc_private.c | 40 ---- tools/libxc/xc_private.h | 7 - tools/libxc/xc_solaris.c | 97 ---------- tools/libxc/xc_suspend.c | 18 +- tools/libxl/Makefile | 5 +- tools/libxl/libxl.c | 2 +- tools/libxl/libxl_dom_suspend.c | 4 +- tools/libxl/libxl_event.c | 14 +- tools/libxl/libxl_internal.h | 5 +- tools/misc/Makefile | 7 +- tools/misc/xen-hptool.c | 13 +- tools/misc/xen-lowmemd.c | 15 +- tools/ocaml/libs/eventchn/Makefile | 4 +- tools/ocaml/libs/eventchn/xeneventchn_stubs.c | 20 +- tools/python/setup.py | 7 +- tools/tests/xen-access/Makefile | 3 +- tools/tests/xen-access/xen-access.c | 21 +- tools/xcutils/Makefile | 4 +- tools/xenmon/Makefile | 2 + tools/xenmon/xenbaked.c | 13 +- tools/xenpaging/Makefile | 4 +- tools/xenpaging/xenpaging.c | 18 +- tools/xenpaging/xenpaging.h | 3 +- tools/xenstore/Makefile | 5 +- tools/xenstore/xenstored_core.c | 6 +- tools/xenstore/xenstored_domain.c | 25 +-- tools/xentrace/Makefile | 5 +- tools/xentrace/xentrace.c | 13 +- 61 files changed, 1530 insertions(+), 925 deletions(-) create mode 100644 tools/libs/evtchn/Makefile create mode 100644 tools/libs/evtchn/core.c create mode 100644 tools/libs/evtchn/freebsd.c create mode 100644 tools/libs/evtchn/include/xenevtchn.h create mode 100644 tools/libs/evtchn/libxenevtchn.map create mode 100644 tools/libs/evtchn/linux.c create mode 100644 tools/libs/evtchn/minios.c create mode 100644 tools/libs/evtchn/netbsd.c create mode 100644 tools/libs/evtchn/private.h create mode 100644 tools/libs/evtchn/solaris.c create mode 100644 tools/libxc/include/xenctrl_compat.h create mode 100644 tools/libxc/xc_evtchn_compat.c
.gitignore +1 -0
@@ -59,6 +59,7 @@ stubdom/include stubdom/ioemu stubdom/xenstore stubdom/libxentoollog-* +stubdom/libxenevtchn-* stubdom/libxc-* stubdom/lwip-* stubdom/mini-os-*
stubdom/Makefile +16 -1
@@ -319,6 +319,12 @@ mk-headers-$(XEN_TARGET_ARCH): $(IOEMU_LINKFARM_TARGET) ln -sf $(XEN_ROOT)/tools/libs/toollog/include/*.h . && \ ln -sf $(XEN_ROOT)/tools/libs/toollog/*.c . && \ ln -sf $(XEN_ROOT)/tools/libs/toollog/Makefile . ) + mkdir -p libs-$(XEN_TARGET_ARCH)/evtchn/include + [ -h libs-$(XEN_TARGET_ARCH)/evtchn/Makefile ] || ( cd libs-$(XEN_TARGET_ARCH)/evtchn && \ + ln -sf $(XEN_ROOT)/tools/libs/evtchn/*.h . && \ + ln -sf $(XEN_ROOT)/tools/libs/evtchn/include/*.h include/ && \ + ln -sf $(XEN_ROOT)/tools/libs/evtchn/*.c . && \ + ln -sf $(XEN_ROOT)/tools/libs/evtchn/Makefile . ) mkdir -p libxc-$(XEN_TARGET_ARCH) [ -h libxc-$(XEN_TARGET_ARCH)/Makefile ] || ( cd libxc-$(XEN_TARGET_ARCH) && \ ln -sf $(XEN_ROOT)/tools/libxc/*.h . && \
@@ -351,12 +357,21 @@ libs-$(XEN_TARGET_ARCH)/toollog/libxentoollog.a: mk-headers-$(XEN_TARGET_ARCH) $ CPPFLAGS="$(TARGET_CPPFLAGS)" CFLAGS="$(TARGET_CFLAGS)" $(MAKE) DESTDIR= -C libs-$(XEN_TARGET_ARCH)/toollog ####### +# libxenevtchn +####### + +.PHONY: libxenevtchn +libxenevtchn: libs-$(XEN_TARGET_ARCH)/evtchn/libxenevtchn.a +libs-$(XEN_TARGET_ARCH)/evtchn/libxenevtchn.a: mk-headers-$(XEN_TARGET_ARCH) $(NEWLIB_STAMPFILE) + CPPFLAGS="$(TARGET_CPPFLAGS)" CFLAGS="$(TARGET_CFLAGS)" $(MAKE) DESTDIR= -C libs-$(XEN_TARGET_ARCH)/evtchn + +####### # libxc ####### .PHONY: libxc libxc: libxc-$(XEN_TARGET_ARCH)/libxenctrl.a libxc-$(XEN_TARGET_ARCH)/libxenguest.a -libxc-$(XEN_TARGET_ARCH)/libxenctrl.a: mk-headers-$(XEN_TARGET_ARCH) libxentoollog cross-zlib +libxc-$(XEN_TARGET_ARCH)/libxenctrl.a: mk-headers-$(XEN_TARGET_ARCH) libxentoollog libxenevtchn cross-zlib CPPFLAGS="$(TARGET_CPPFLAGS)" CFLAGS="$(TARGET_CFLAGS)" $(MAKE) DESTDIR= CONFIG_LIBXC_MINIOS=y -C libxc-$(XEN_TARGET_ARCH) libxc-$(XEN_TARGET_ARCH)/libxenguest.a: libxc-$(XEN_TARGET_ARCH)/libxenctrl.a
tools/Makefile +4 -1
@@ -248,8 +248,10 @@ subdir-all-qemu-xen-dir: qemu-xen-dir-find --libdir=$(LIBEXEC_LIB) \ --includedir=$(LIBEXEC_INC) \ --source-path=$$source \ - --extra-cflags="-I$(XEN_ROOT)/tools/include \ + --extra-cflags="-DXC_WANT_COMPAT_EVTCHN_API=1 \ + -I$(XEN_ROOT)/tools/include \ -I$(XEN_ROOT)/tools/libs/toollog/include \ + -I$(XEN_ROOT)/tools/libs/evtchn/include \ -I$(XEN_ROOT)/tools/libxc/include \ -I$(XEN_ROOT)/tools/xenstore/include \ -I$(XEN_ROOT)/tools/xenstore/compat/include \
@@ -257,6 +259,7 @@ subdir-all-qemu-xen-dir: qemu-xen-dir-find --extra-ldflags="-L$(XEN_ROOT)/tools/libxc \ -L$(XEN_ROOT)/tools/xenstore \ -Wl,-rpath-link=$(XEN_ROOT)/tools/libs/toollog \ + -Wl,-rpath-link=$(XEN_ROOT)/tools/libs/evtchn \ $(QEMU_UPSTREAM_RPATH)" \ --bindir=$(LIBEXEC_BIN) \ --datadir=$(SHAREDIR)/qemu-xen \
tools/Rules.mk +10 -4
@@ -11,6 +11,7 @@ INSTALL = $(XEN_ROOT)/tools/cross-install XEN_INCLUDE = $(XEN_ROOT)/tools/include XEN_LIBXENTOOLLOG = $(XEN_ROOT)/tools/libs/toollog +XEN_LIBXENEVTCHN = $(XEN_ROOT)/tools/libs/evtchn XEN_LIBXC = $(XEN_ROOT)/tools/libxc XEN_XENLIGHT = $(XEN_ROOT)/tools/libxl XEN_XENSTORE = $(XEN_ROOT)/tools/xenstore
@@ -82,13 +83,18 @@ SHDEPS_libxentoollog = LDLIBS_libxentoollog = $(XEN_LIBXENTOOLLOG)/libxentoollog$(libextension) SHLIB_libxentoollog = -Wl,-rpath-link=$(XEN_LIBXENTOOLLOG) +CFLAGS_libxenevtchn = -I$(XEN_LIBXENEVTCHN)/include $(CFLAGS_xeninclude) +SHDEPS_libxenevtchn = +LDLIBS_libxenevtchn = $(XEN_LIBXENEVTCHN)/libxenevtchn$(libextension) +SHLIB_libxenevtchn = -Wl,-rpath-link=$(XEN_LIBXENEVTCHN) + CFLAGS_libxenctrl = -I$(XEN_LIBXC)/include $(CFLAGS_libxentoollog) $(CFLAGS_xeninclude) -SHDEPS_libxenctrl = $(SHLIB_libxentoollog) +SHDEPS_libxenctrl = $(SHLIB_libxentoollog) $(SHLIB_libxenevtchn) LDLIBS_libxenctrl = $(SHDEPS_libxenctrl) $(XEN_LIBXC)/libxenctrl$(libextension) SHLIB_libxenctrl = $(SHDEPS_libxenctrl) -Wl,-rpath-link=$(XEN_LIBXC) -CFLAGS_libxenguest = -I$(XEN_LIBXC)/include $(CFLAGS_xeninclude) -SHDEPS_libxenguest = +CFLAGS_libxenguest = -I$(XEN_LIBXC)/include $(CFLAGS_libxenevtchn) $(CFLAGS_xeninclude) +SHDEPS_libxenguest = $(SHLIB_libxenevtchn) LDLIBS_libxenguest = $(SHDEPS_libxenguest) $(XEN_LIBXC)/libxenguest$(libextension) SHLIB_libxenguest = $(SHDEPS_libxenguest) -Wl,-rpath-link=$(XEN_LIBXC)
@@ -103,7 +109,7 @@ LDLIBS_libxenstat = $(SHDEPS_libxenstat) $(XEN_LIBXENSTAT)/libxenstat$(libexten SHLIB_libxenstat = $(SHDEPS_libxenstat) -Wl,-rpath-link=$(XEN_LIBXENSTAT) CFLAGS_libxenvchan = -I$(XEN_LIBVCHAN) -SHDEPS_libxenvchan = $(SHLIB_libxenctrl) $(SHLIB_libxenstore) +SHDEPS_libxenvchan = $(SHLIB_libxenctrl) $(SHLIB_libxenstore) $(SHLIB_libxenevtchn) LDLIBS_libxenvchan = $(SHDEPS_libxenvchan) $(XEN_LIBVCHAN)/libxenvchan$(libextension) SHLIB_libxenvchan = $(SHDEPS_libxenvchan) -Wl,-rpath-link=$(XEN_LIBVCHAN)
tools/console/Makefile +2 -0
@@ -3,8 +3,10 @@ include $(XEN_ROOT)/tools/Rules.mk CFLAGS += -Werror +CFLAGS += $(CFLAGS_libxenevtchn) CFLAGS += $(CFLAGS_libxenctrl) CFLAGS += $(CFLAGS_libxenstore) +LDLIBS += $(LDLIBS_libxenevtchn) LDLIBS += $(LDLIBS_libxenctrl) LDLIBS += $(LDLIBS_libxenstore) LDLIBS += $(SOCKET_LIBS)
tools/console/daemon/io.c +22 -21
165 lines not on this page · raw message
tools/libs/Makefile +1 -0
@@ -3,5 +3,6 @@ include $(XEN_ROOT)/tools/Rules.mk SUBDIRS-y := SUBDIRS-y += toollog +SUBDIRS-y += evtchn all clean install distclean: %: subdirs-%
tools/libs/evtchn/Makefile new file +65 -0
65 lines not on this page · raw message
tools/libs/evtchn/core.c new file +72 -0
72 lines not on this page · raw message
tools/libs/evtchn/freebsd.c new file +138 -0
138 lines not on this page · raw message
tools/libs/evtchn/include/xenevtchn.h new file +150 -0
150 lines not on this page · raw message
tools/libs/evtchn/libxenevtchn.map new file +14 -0
@@ -0,0 +1,14 @@ +VERS_1.0 { + global: + xenevtchn_fd; + xenevtchn_bind_unbound_port; + xenevtchn_unbind; + xenevtchn_unmask; + xenevtchn_notify; + xenevtchn_bind_interdomain; + xenevtchn_bind_virq; + xenevtchn_open; + xenevtchn_close; + xenevtchn_pending; + local: *; /* Do not expose anything by default */ +};
tools/libs/evtchn/linux.c new file +136 -0
136 lines not on this page · raw message
tools/libs/evtchn/minios.c new file +269 -0
269 lines not on this page · raw message
tools/libs/evtchn/netbsd.c new file +147 -0
147 lines not on this page · raw message
tools/libs/evtchn/private.h new file +25 -0
@@ -0,0 +1,25 @@ +#ifndef XENEVTCHN_PRIVATE_H +#define XENEVTCHN_PRIVATE_H + +#include <xentoollog.h> +#include <xenevtchn.h> + +struct xenevtchn_handle { +xentoollog_logger *logger, *logger_tofree; +int fd; +}; + +int osdep_evtchn_open (xenevtchn_handle *xce); +int osdep_evtchn_close (xenevtchn_handle *xce); + +#endif + +/* +* Local variables: +* mode: C +* c-file-style: "BSD" +* c-basic-offset: 4 +* tab-width: 4 +* indent-tabs-mode: nil +* End: +*/
tools/libs/evtchn/solaris.c new file +135 -0
135 lines not on this page · raw message
tools/libs/toollog/include/xentoollog.h +10 -0
@@ -134,3 +134,13 @@ const char *xtl_level_to_string(xentoollog_level); /* never fails */#endif /* XENTOOLLOG_H */ + +/* +* Local variables: +* mode: C +* c-file-style: "BSD" +* c-basic-offset: 4 +* tab-width: 4 +* indent-tabs-mode: nil +* End: +*/
tools/libs/toollog/xtl_core.c +10 -0
@@ -81,3 +81,13 @@ void xtl_logger_destroy(struct xentoollog_logger *logger) {if (!logger)return ; logger->destroy (logger); } + +/* +* Local variables: +* mode: C +* c-file-style: "BSD" +* c-basic-offset: 4 +* tab-width: 4 +* indent-tabs-mode: nil +* End: +*/
tools/libs/toollog/xtl_logger_stdio.c +10 -0
@@ -190,3 +190,13 @@ xentoollog_logger_stdiostream *xtl_createlogger_stdiostreamreturn XTL_NEW_LOGGER (stdiostream, newlogger); } + +/* +* Local variables: +* mode: C +* c-file-style: "BSD" +* c-basic-offset: 4 +* tab-width: 4 +* indent-tabs-mode: nil +* End: +*/
tools/libvchan/Makefile +3 -3
@@ -10,9 +10,9 @@ NODE_OBJS = node.o NODE2_OBJS = node-select.o LIBVCHAN_PIC_OBJS = $(patsubst %.o,%.opic,$(LIBVCHAN_OBJS)) -LIBVCHAN_LIBS = $(LDLIBS_libxenstore) $(LDLIBS_libxenctrl) -$(LIBVCHAN_OBJS) $(LIBVCHAN_PIC_OBJS): CFLAGS += $(CFLAGS_libxenstore) $(CFLAGS_libxenctrl) -$(NODE_OBJS) $(NODE2_OBJS): CFLAGS += $(CFLAGS_libxenctrl) +LIBVCHAN_LIBS = $(LDLIBS_libxenstore) $(LDLIBS_libxenctrl) $(LDLIBS_libxenevtchn) +$(LIBVCHAN_OBJS) $(LIBVCHAN_PIC_OBJS): CFLAGS += $(CFLAGS_libxenstore) $(CFLAGS_libxenctrl) $(CFLAGS_libxenevtchn) +$(NODE_OBJS) $(NODE2_OBJS): CFLAGS += $(CFLAGS_libxenctrl) $(CFLAGS_libxenevtchn) MAJOR = 1.0 MINOR = 0
tools/libvchan/init.c +10 -10
@@ -216,25 +216,25 @@ static int init_evt_srv(struct libxenvchan *ctrl, int domain, xentoollog_logger {evtchn_port_or_error_t port; - ctrl->event =xc_evtchn_open (logger,0 ); + ctrl->event =xenevtchn_open (logger,0 );if (!ctrl->event)return -1 ; - port =xc_evtchn_bind_unbound_port (ctrl->event, domain); + port =xenevtchn_bind_unbound_port (ctrl->event, domain);if (port <0 ) goto fail; ctrl->event_port = port; -if (xc_evtchn_unmask (ctrl->event, ctrl->event_port)) +if (xenevtchn_unmask (ctrl->event, ctrl->event_port)) goto fail;return 0 ; fail:if (port >=0 ) -xc_evtchn_unbind (ctrl->event, port); +xenevtchn_unbind (ctrl->event, port); -xc_evtchn_close (ctrl->event); +xenevtchn_close (ctrl->event); ctrl->event =NULL ;return -1 ;
@@ -346,26 +346,26 @@ static int init_evt_cli(struct libxenvchan *ctrl, int domain, xentoollog_logger {evtchn_port_or_error_t port; - ctrl->event =xc_evtchn_open (logger,0 ); + ctrl->event =xenevtchn_open (logger,0 );if (!ctrl->event)return -1 ; - port =xc_evtchn_bind_interdomain (ctrl->event, + port =xenevtchn_bind_interdomain (ctrl->event, domain, ctrl->event_port);if (port <0 ) goto fail; ctrl->event_port = port; -if (xc_evtchn_unmask (ctrl->event, ctrl->event_port)) +if (xenevtchn_unmask (ctrl->event, ctrl->event_port)) goto fail;return 0 ; fail:if (port >=0 ) -xc_evtchn_unbind (ctrl->event, port); +xenevtchn_unbind (ctrl->event, port); -xc_evtchn_close (ctrl->event); +xenevtchn_close (ctrl->event); ctrl->event =NULL ;return -1 ;
tools/libvchan/io.c +6 -6
@@ -105,7 +105,7 @@ static inline int send_notify(struct libxenvchan *ctrl, uint8_t bit) notify = ctrl->is_server ? &ctrl->ring->srv_notify : &ctrl->ring->cli_notify; prev =__sync_fetch_and_and (notify, ~bit);if (prev & bit) -return xc_evtchn_notify (ctrl->event, ctrl->event_port); +return xenevtchn_notify (ctrl->event, ctrl->event_port);else return 0 ; }
@@ -194,10 +194,10 @@ int libxenvchan_buffer_space(struct libxenvchan *ctrl)int libxenvchan_wait (struct libxenvchan *ctrl) { -int ret =xc_evtchn_pending (ctrl->event); +int ret =xenevtchn_pending (ctrl->event);if (ret <0 )return -1 ; -xc_evtchn_unmask (ctrl->event, ret); +xenevtchn_unmask (ctrl->event, ret);return 0 ; }
@@ -350,7 +350,7 @@ int libxenvchan_is_open(struct libxenvchan* ctrl)int libxenvchan_fd_for_select (struct libxenvchan *ctrl) { -return xc_evtchn_fd (ctrl->event); +return xenevtchn_fd (ctrl->event); }void libxenvchan_close (struct libxenvchan *ctrl)
@@ -372,8 +372,8 @@ void libxenvchan_close(struct libxenvchan *ctrl) }if (ctrl->event) {if (ctrl->ring) -xc_evtchn_notify (ctrl->event, ctrl->event_port); -xc_evtchn_close (ctrl->event); +xenevtchn_notify (ctrl->event, ctrl->event_port); +xenevtchn_close (ctrl->event); }if (ctrl->is_server) {if (ctrl->gntshr)
tools/libvchan/libxenvchan.h +2 -1
@@ -44,6 +44,7 @@#include <xen/io/libxenvchan.h> #include <xen/sys/evtchn.h> +#include <xenevtchn.h> #include <xenctrl.h> struct libxenvchan_ring {
@@ -71,7 +72,7 @@ struct libxenvchan {/* Pointer to shared ring page */ struct vchan_interface *ring;/* event channel interface */ -xc_evtchn *event; +xenevtchn_handle *event;uint32_t event_port;/* informative flags: are we acting as server? */ int is_server:1;
tools/libxc/Makefile +5 -3
@@ -48,6 +48,7 @@ CTRL_SRCS-$(CONFIG_SunOS) += xc_solaris.c CTRL_SRCS-$(CONFIG_NetBSD) += xc_netbsd.c CTRL_SRCS-$(CONFIG_NetBSDRump) += xc_netbsd.c CTRL_SRCS-$(CONFIG_MiniOS) += xc_minios.c +CTRL_SRCS-y += xc_evtchn_compat.c GUEST_SRCS-y := GUEST_SRCS-y += xg_private.c xc_suspend.c
@@ -111,6 +112,7 @@ CFLAGS-$(CONFIG_Linux) += -D_GNU_SOURCE CFLAGS += $(PTHREAD_CFLAGS) CFLAGS += $(CFLAGS_libxentoollog) +CFLAGS += $(CFLAGS_libxenevtchn) CTRL_LIB_OBJS := $(patsubst %.c,%.o,$(CTRL_SRCS-y)) CTRL_PIC_OBJS := $(patsubst %.c,%.opic,$(CTRL_SRCS-y))
@@ -164,7 +166,7 @@ install: build $(INSTALL_DATA) libxenctrl.a $(DESTDIR)$(libdir) $(SYMLINK_SHLIB) libxenctrl.so.$(MAJOR).$(MINOR) $(DESTDIR)$(libdir)/libxenctrl.so.$(MAJOR) $(SYMLINK_SHLIB) libxenctrl.so.$(MAJOR) $(DESTDIR)$(libdir)/libxenctrl.so - $(INSTALL_DATA) include/xenctrl.h include/xenctrlosdep.h $(DESTDIR)$(includedir) + $(INSTALL_DATA) include/xenctrl.h include/xenctrl_compat.h include/xenctrlosdep.h $(DESTDIR)$(includedir) $(INSTALL_SHLIB) libxenguest.so.$(MAJOR).$(MINOR) $(DESTDIR)$(libdir) $(INSTALL_DATA) libxenguest.a $(DESTDIR)$(libdir) $(SYMLINK_SHLIB) libxenguest.so.$(MAJOR).$(MINOR) $(DESTDIR)$(libdir)/libxenguest.so.$(MAJOR)
@@ -207,7 +209,7 @@ libxenctrl.so.$(MAJOR): libxenctrl.so.$(MAJOR).$(MINOR) $(SYMLINK_SHLIB) $< $@ libxenctrl.so.$(MAJOR).$(MINOR): $(CTRL_PIC_OBJS) - $(CC) $(LDFLAGS) $(PTHREAD_LDFLAGS) -Wl,$(SONAME_LDFLAG) -Wl,libxenctrl.so.$(MAJOR) $(SHLIB_LDFLAGS) -o $@ $^ $(LDLIBS_libxentoollog) $(DLOPEN_LIBS) $(PTHREAD_LIBS) $(APPEND_LDFLAGS) + $(CC) $(LDFLAGS) $(PTHREAD_LDFLAGS) -Wl,$(SONAME_LDFLAG) -Wl,libxenctrl.so.$(MAJOR) $(SHLIB_LDFLAGS) -o $@ $^ $(LDLIBS_libxentoollog) $(LDLIBS_libxenevtchn) $(DLOPEN_LIBS) $(PTHREAD_LIBS) $(APPEND_LDFLAGS) # libxenguest
@@ -230,7 +232,7 @@ xc_dom_bzimageloader.opic: CFLAGS += $(call zlib-options,D) libxenguest.so.$(MAJOR).$(MINOR): COMPRESSION_LIBS = $(call zlib-options,l) libxenguest.so.$(MAJOR).$(MINOR): $(GUEST_PIC_OBJS) libxenctrl.so - $(CC) $(LDFLAGS) -Wl,$(SONAME_LDFLAG) -Wl,libxenguest.so.$(MAJOR) $(SHLIB_LDFLAGS) -o $@ $(GUEST_PIC_OBJS) $(COMPRESSION_LIBS) -lz $(LDLIBS_libxenctrl) $(PTHREAD_LIBS) $(APPEND_LDFLAGS) + $(CC) $(LDFLAGS) -Wl,$(SONAME_LDFLAG) -Wl,libxenguest.so.$(MAJOR) $(SHLIB_LDFLAGS) -o $@ $(GUEST_PIC_OBJS) $(COMPRESSION_LIBS) -lz $(LDLIBS_libxenevtchn) $(LDLIBS_libxenctrl) $(PTHREAD_LIBS) $(APPEND_LDFLAGS) xenctrl_osdep_ENOSYS.so: $(OSDEP_PIC_OBJS) libxenctrl.so $(CC) $(LDFLAGS) $(SHLIB_LDFLAGS) -o $@ $(OSDEP_PIC_OBJS) $(LDLIBS_libxenctrl) $(APPEND_LDFLAGS)
tools/libxc/include/xenctrl.h +3 -96
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tools/libxc/include/xenctrl_compat.h new file +48 -0
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tools/libxc/include/xenguest.h +10 -4
@@ -34,6 +34,12 @@#define X86_64_B_SIZE 64#define X86_32_B_SIZE 32 +/* +* User not using xc_suspend_* / xc_await_suspent may not want to +* include the full libxenevtchn API here. +*/ +typedef struct xenevtchn_handle xenevtchn_handle ; +/* callbacks provided by xc_domain_save */ struct save_callbacks {/* Called after expiration of checkpoint interval,
@@ -161,18 +167,18 @@ struct xc_hvm_firmware_module {* Sets *lockfd to -1. * Has deallocated everything even on error. */ -int xc_suspend_evtchn_release (xc_interface *xch,xc_evtchn *xce,int domid,int suspend_evtchn,int *lockfd); +int xc_suspend_evtchn_release (xc_interface *xch,xenevtchn_handle *xce,int domid,int suspend_evtchn,int *lockfd);/** * This function eats the initial notification. * xce must not be used for anything else * See xc_suspend_evtchn_init_sane re lockfd. */ -int xc_suspend_evtchn_init_exclusive (xc_interface *xch,xc_evtchn *xce, +int xc_suspend_evtchn_init_exclusive (xc_interface *xch,xenevtchn_handle *xce,int domid,int port,int *lockfd);/* xce must not be used for anything else */ -int xc_await_suspend (xc_interface *xch,xc_evtchn *xce,int suspend_evtchn); +int xc_await_suspend (xc_interface *xch,xenevtchn_handle *xce,int suspend_evtchn);/** * The port will be signaled immediately after this call
@@ -181,7 +187,7 @@ int xc_await_suspend(xc_interface *xch, xc_evtchn *xce, int suspend_evtchn);* and fed to xc_suspend_evtchn_release. (On error *lockfd is * undefined and xc_suspend_evtchn_release is not allowed.) */ -int xc_suspend_evtchn_init_sane (xc_interface *xch,xc_evtchn *xce, +int xc_suspend_evtchn_init_sane (xc_interface *xch,xenevtchn_handle *xce,int domid,int port,int *lockfd); int xc_mark_page_online(xc_interface *xch, unsigned long start,
tools/libxc/xc_evtchn_compat.c new file +75 -0
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tools/libxc/xc_freebsd_osdep.c +0 -101
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tools/libxc/xc_linux_osdep.c +0 -95
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tools/libxc/xc_minios.c +0 -221
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tools/libxc/xc_netbsd.c +0 -109
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tools/libxc/xc_private.c +0 -40
@@ -251,46 +251,6 @@ int do_xen_hypercall(xc_interface *xch, privcmd_hypercall_t *hypercall)return xch->ops->u.privcmd.hypercall (xch, xch->ops_handle, hypercall); } -xc_evtchn *xc_evtchn_open (xentoollog_logger *logger,unsigned open_flags) -{ -xc_evtchn *xce =malloc (sizeof (*xce)); -int rc; - -if (!xce)return NULL ; - - xce->fd =-1 ; - xce->logger = logger; - xce->logger_tofree =NULL ; - -if (!xce->logger) { - xce->logger = xce->logger_tofree = - (xentoollog_logger *) -xtl_createlogger_stdiostream (stderr,XTL_PROGRESS ,0 ); -if (!xce->logger) goto err; - } - - rc =osdep_evtchn_open (xce); -if ( rc <0 ) goto err; - -return xce; - -err: -osdep_evtchn_close (xce); -xtl_logger_destroy (xce->logger_tofree); -free (xce); -return NULL ; -} - -int xc_evtchn_close (xc_evtchn *xce) -{ -int rc; - - rc =osdep_evtchn_close (xce); -xtl_logger_destroy (xce->logger_tofree); -free (xce); -return rc; -} -xc_gnttab *xc_gnttab_open (xentoollog_logger *logger,unsigned open_flags) {
tools/libxc/xc_private.h +0 -7
@@ -123,13 +123,6 @@ struct xc_interface_core {xc_osdep_handle ops_handle;/* opaque data for xc_osdep_ops */ }; -struct xenevtchn_handle { -xentoollog_logger *logger, *logger_tofree; -int fd; -}; -int osdep_evtchn_open (xc_evtchn *xce); -int osdep_evtchn_close (xc_evtchn *xce); -void xc_report_error (xc_interface *xch,int code,const char *fmt, ...) __attribute__((format (printf,3 ,4 ))); void xc_reportv(xc_interface *xch, xentoollog_logger *lg, xentoollog_level,
tools/libxc/xc_solaris.c +0 -97
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tools/libxc/xc_suspend.c +10 -8
@@ -16,6 +16,8 @@#include <unistd.h> #include <fcntl.h> +#include <xenevtchn.h> +#include "xc_private.h" #include "xenguest.h"
@@ -124,12 +126,12 @@ static int unlock_suspend_event(xc_interface *xch, int domid, int *lockfd)return -1 ; } -int xc_await_suspend (xc_interface *xch,xc_evtchn *xce,int suspend_evtchn) +int xc_await_suspend (xc_interface *xch,xenevtchn_handle *xce,int suspend_evtchn) {int rc; do { - rc = xc_evtchn_pending(xce); + rc = xenevtchn_pending(xce); if (rc < 0) { ERROR("error polling suspend notification channel: %d", rc); return -1;
@@ -137,7 +139,7 @@ int xc_await_suspend(xc_interface *xch, xc_evtchn *xce, int suspend_evtchn) }while (rc != suspend_evtchn);/* harmless for one-off suspend */ -if (xc_evtchn_unmask (xce, suspend_evtchn) <0 ) +if (xenevtchn_unmask (xce, suspend_evtchn) <0 )ERROR ("failed to unmask suspend notification channel: %d" , rc);return 0 ;
@@ -145,16 +147,16 @@ int xc_await_suspend(xc_interface *xch, xc_evtchn *xce, int suspend_evtchn)/* Internal callers are allowed to call this with suspend_evtchn<0 * but *lockfd>0. */ -int xc_suspend_evtchn_release (xc_interface *xch,xc_evtchn *xce, +int xc_suspend_evtchn_release (xc_interface *xch,xenevtchn_handle *xce,int domid,int suspend_evtchn,int *lockfd) {if (suspend_evtchn >=0 ) -xc_evtchn_unbind (xce, suspend_evtchn); +xenevtchn_unbind (xce, suspend_evtchn);return unlock_suspend_event (xch, domid, lockfd); } -int xc_suspend_evtchn_init_sane (xc_interface *xch,xc_evtchn *xce, +int xc_suspend_evtchn_init_sane (xc_interface *xch,xenevtchn_handle *xce,int domid,int port,int *lockfd) {int rc, suspend_evtchn =-1 ;
@@ -164,7 +166,7 @@ int xc_suspend_evtchn_init_sane(xc_interface *xch, xc_evtchn *xce, goto cleanup; } - suspend_evtchn =xc_evtchn_bind_interdomain (xce, domid, port); + suspend_evtchn =xenevtchn_bind_interdomain (xce, domid, port);if (suspend_evtchn <0 ) {ERROR ("failed to bind suspend event channel: %d" , suspend_evtchn); goto cleanup;
@@ -184,7 +186,7 @@ cleanup:return -1 ; } -int xc_suspend_evtchn_init_exclusive (xc_interface *xch,xc_evtchn *xce, +int xc_suspend_evtchn_init_exclusive (xc_interface *xch,xenevtchn_handle *xce,int domid,int port,int *lockfd) {int suspend_evtchn;
tools/libxl/Makefile +3 -2
@@ -20,12 +20,13 @@ LIBUUID_LIBS += -luuid endif LIBXL_LIBS = -LIBXL_LIBS = $(LDLIBS_libxentoollog) $(LDLIBS_libxenctrl) $(LDLIBS_libxenguest) $(LDLIBS_libxenstore) $(LDLIBS_libblktapctl) $(PTYFUNCS_LIBS) $(LIBUUID_LIBS) +LIBXL_LIBS = $(LDLIBS_libxentoollog) $(LDLIBS_libxenevtchn) $(LDLIBS_libxenctrl) $(LDLIBS_libxenguest) $(LDLIBS_libxenstore) $(LDLIBS_libblktapctl) $(PTYFUNCS_LIBS) $(LIBUUID_LIBS) ifeq ($(CONFIG_REMUS_NETBUF),y) LIBXL_LIBS += $(LIBNL3_LIBS) endif CFLAGS_LIBXL += $(CFLAGS_libxentoollog) +CFLAGS_LIBXL += $(CFLAGS_libxenevtchn) CFLAGS_LIBXL += $(CFLAGS_libxenctrl) CFLAGS_LIBXL += $(CFLAGS_libxenguest) CFLAGS_LIBXL += $(CFLAGS_libxenstore)
@@ -159,7 +160,7 @@ $(XEN_INIT_DOM0_OBJS): CFLAGS += $(CFLAGS_libxenctrl) $(XEN_INIT_DOM0_OBJS): CFLAGS += $(CFLAGS_libxenstore) SAVE_HELPER_OBJS = libxl_save_helper.o _libxl_save_msgs_helper.o -$(SAVE_HELPER_OBJS): CFLAGS += $(CFLAGS_libxenctrl) +$(SAVE_HELPER_OBJS): CFLAGS += $(CFLAGS_libxenctrl) $(CFLAGS_libxenevtchn) PKG_CONFIG = xenlight.pc xlutil.pc
tools/libxl/libxl.c +1 -1
@@ -186,7 +186,7 @@ int libxl_ctx_free(libxl_ctx *ctx)if (ctx->xch)xc_interface_close (ctx->xch);libxl_version_info_dispose (&ctx->version_info);if (ctx->xsh)xs_daemon_close (ctx->xsh); -if (ctx->xce)xc_evtchn_close (ctx->xce); +if (ctx->xce)xenevtchn_close (ctx->xce);libxl__poller_put (ctx, ctx->poller_app); ctx->poller_app =NULL ;
tools/libxl/libxl_dom_suspend.c +2 -2
@@ -107,9 +107,9 @@ static void domain_suspend_callback_common(libxl__egc *egc,if ((hvm_s_state ==0 ) && (dss->guest_evtchn.port >=0 )) {LOG (DEBUG ,"issuing %s suspend request via event channel" , dss->hvm ?"PVHVM" :"PV" ); - ret =xc_evtchn_notify (CTX ->xce, dss->guest_evtchn.port); + ret =xenevtchn_notify (CTX ->xce, dss->guest_evtchn.port);if (ret <0 ) { -LOG (ERROR ,"xc_evtchn_notify failed ret=%d" , ret); +LOG (ERROR ,"xenevtchn_notify failed ret=%d" , ret); rc =ERROR_FAIL ; goto err; }
tools/libxl/libxl_event.c +7 -7
@@ -739,7 +739,7 @@ static void evtchn_fd_callback(libxl__egc *egc, libxl__ev_fd *ev,/* OK, that's that workaround done. We can actually check for * work for us to do: */ - port =xc_evtchn_pending (CTX ->xce); + port =xenevtchn_pending (CTX ->xce);if (port <0 ) {if (errno ==EAGAIN )break ;
@@ -765,20 +765,20 @@ static void evtchn_fd_callback(libxl__egc *egc, libxl__ev_fd *ev, }int libxl__ctx_evtchn_init (libxl__gc *gc) { -xc_evtchn *xce; +xenevtchn_handle *xce;int rc, fd;if (CTX ->xce)return 0 ; - xce =xc_evtchn_open (CTX ->lg,0 ); + xce =xenevtchn_open (CTX ->lg,0 );if (!xce) {LOGE (ERROR ,"cannot open libxc evtchn handle" ); rc =ERROR_FAIL ; goto out; } - fd =xc_evtchn_fd (xce); + fd =xenevtchn_fd (xce);assert (fd >=0 ); rc =libxl_fd_set_nonblock (CTX , fd,1 );
@@ -788,7 +788,7 @@ int libxl__ctx_evtchn_init(libxl__gc *gc) {return 0 ; out: -xc_evtchn_close (xce); +xenevtchn_close (xce);return rc; }
@@ -810,14 +810,14 @@ int libxl__ev_evtchn_wait(libxl__gc *gc, libxl__ev_evtchn *evev)if (!libxl__ev_fd_isregistered (&CTX ->evtchn_efd)) { rc =libxl__ev_fd_register (gc, &CTX ->evtchn_efd, evtchn_fd_callback, -xc_evtchn_fd (CTX ->xce),POLLIN ); +xenevtchn_fd (CTX ->xce),POLLIN );if (rc) goto out; }if (evev->waiting)return 0 ; - r =xc_evtchn_unmask (CTX ->xce, evev->port); + r =xenevtchn_unmask (CTX ->xce, evev->port);if (r) {LOGE (ERROR ,"cannot unmask event channel %d" ,evev->port); rc =ERROR_FAIL ;
tools/libxl/libxl_internal.h +3 -2
@@ -48,6 +48,7 @@#include <sys/file.h> #include <sys/ioctl.h> +#include <xenevtchn.h> #include <xenstore.h> #include <xenctrl.h> #include <xenguest.h>
@@ -441,7 +442,7 @@ struct libxl__ctx {uint32_t watch_counter;/* helps disambiguate slot reuse */ libxl__ev_fd watch_efd; -xc_evtchn *xce;/* waiting must be done only with libxl__ev_evtchn* */ +xenevtchn_handle *xce;/* waiting must be done only with libxl__ev_evtchn* */ LIBXL_LIST_HEAD(, libxl__ev_evtchn) evtchns_waiting;libxl__ev_fd evtchn_efd;
@@ -916,7 +917,7 @@ static inline int libxl__ev_xswatch_isregistered(const libxl__ev_xswatch *xw)* When the event is signaled then the callback will be made, once. * Then you must call libxl__ev_evtchn_wait again, if desired. * -* You must NOT call xc_evtchn_unmask. wait will do that for you. +* You must NOT call xenevtchn_unmask. wait will do that for you. * * Calling libxl__ev_evtchn_cancel will arrange for libxl to disregard * future occurrences of event. Both libxl__ev_evtchn_wait and
tools/misc/Makefile +4 -3
@@ -4,6 +4,7 @@ include $(XEN_ROOT)/tools/Rules.mk CFLAGS += -Werror # Include configure output (config.h) CFLAGS += -include $(XEN_ROOT)/tools/config.h +CFLAGS += $(CFLAGS_libxenevtchn) CFLAGS += $(CFLAGS_libxenctrl) CFLAGS += $(CFLAGS_xeninclude) CFLAGS += $(CFLAGS_libxenstore)
@@ -88,18 +89,18 @@ xenlockprof: xenlockprof.o # xen-hptool incorrectly uses libxc internals xen-hptool.o: CFLAGS += -I$(XEN_ROOT)/tools/libxc xen-hptool: xen-hptool.o - $(CC) $(LDFLAGS) -o $@ $< $(LDLIBS_libxenctrl) $(LDLIBS_libxenguest) $(LDLIBS_libxenstore) $(APPEND_LDFLAGS) + $(CC) $(LDFLAGS) -o $@ $< $(LDLIBS_libxenevtchn) $(LDLIBS_libxenctrl) $(LDLIBS_libxenguest) $(LDLIBS_libxenstore) $(APPEND_LDFLAGS) # xen-mfndump incorrectly uses libxc internals xen-mfndump.o: CFLAGS += -I$(XEN_ROOT)/tools/libxc xen-mfndump: xen-mfndump.o - $(CC) $(LDFLAGS) -o $@ $< $(LDLIBS_libxenctrl) $(LDLIBS_libxenguest) $(APPEND_LDFLAGS) + $(CC) $(LDFLAGS) -o $@ $< $(LDLIBS_libxenevtchn) $(LDLIBS_libxenctrl) $(LDLIBS_libxenguest) $(APPEND_LDFLAGS) xenwatchdogd: xenwatchdogd.o $(CC) $(LDFLAGS) -o $@ $< $(LDLIBS_libxenctrl) $(APPEND_LDFLAGS) xen-lowmemd: xen-lowmemd.o - $(CC) $(LDFLAGS) -o $@ $< $(LDLIBS_libxenctrl) $(LDLIBS_libxenstore) $(APPEND_LDFLAGS) + $(CC) $(LDFLAGS) -o $@ $< $(LDLIBS_libxenevtchn) $(LDLIBS_libxenctrl) $(LDLIBS_libxenstore) $(APPEND_LDFLAGS) gtraceview: gtraceview.o $(CC) $(LDFLAGS) -o $@ $< $(CURSES_LIBS) $(TINFO_LIBS) $(APPEND_LDFLAGS)
tools/misc/xen-hptool.c +7 -6
@@ -1,3 +1,4 @@ +#include <xenevtchn.h> #include <xenctrl.h> #include <xc_private.h> #include <xc_core.h>
@@ -98,7 +99,7 @@ static int hp_mem_query_func(int argc, char *argv[])return ret; } -static int suspend_guest (xc_interface *xch,xc_evtchn *xce,int domid, +static int suspend_guest (xc_interface *xch,xenevtchn_handle *xce,int domid,int *evtchn,int *lockfd) {int port, rc, suspend_evtchn =-1 ;
@@ -123,7 +124,7 @@ static int suspend_guest(xc_interface *xch, xc_evtchn *xce, int domid, } *evtchn = suspend_evtchn; - rc =xc_evtchn_notify (xce, suspend_evtchn); + rc =xenevtchn_notify (xce, suspend_evtchn);if (rc <0 ) {fprintf (stderr,"Failed to notify suspend channel: errno %d\n" , rc);
@@ -198,8 +199,8 @@ static int hp_mem_offline_func(int argc, char *argv[])else if (status &PG_OFFLINE_OWNED ) {int result, suspend_evtchn =-1 , suspend_lockfd =-1 ; -xc_evtchn *xce; - xce =xc_evtchn_open (NULL ,0 ); +xenevtchn_handle *xce; + xce =xenevtchn_open (NULL ,0 );if (xce ==NULL ) {
@@ -214,7 +215,7 @@ static int hp_mem_offline_func(int argc, char *argv[]) {fprintf (stderr,"Failed to suspend guest %d for" " mfn %lx\n" , domid, mfn); -xc_evtchn_close (xce); +xenevtchn_close (xce);return -1 ; }
@@ -238,7 +239,7 @@ static int hp_mem_offline_func(int argc, char *argv[])xc_domain_resume (xch, domid,1 );xc_suspend_evtchn_release (xch, xce, domid, suspend_evtchn, &suspend_lockfd); -xc_evtchn_close (xce); +xenevtchn_close (xce); }break ; }
tools/misc/xen-lowmemd.c +8 -7
@@ -4,22 +4,23 @@*/ #include <stdio.h> +#include <xenevtchn.h> #include <xenctrl.h> #include <xenstore.h> #include <stdlib.h> #include <string.h> static evtchn_port_t virq_port =-1 ; -static xc_evtchn *xce_handle =NULL ; +static xenevtchn_handle *xce_handle =NULL ;static xc_interface *xch =NULL ;static struct xs_handle *xs_handle =NULL ;void cleanup (void ) {if (virq_port >-1 ) -xc_evtchn_unbind (xce_handle, virq_port); +xenevtchn_unbind (xce_handle, virq_port);if (xce_handle) -xc_evtchn_close (xce_handle); +xenevtchn_close (xce_handle);if (xch)xc_interface_close (xch);if (xs_handle)
@@ -94,7 +95,7 @@ int main(int argc, char *argv[])return 1 ; } - xce_handle =xc_evtchn_open (NULL ,0 ); + xce_handle =xenevtchn_open (NULL ,0 );if (xce_handle ==NULL ) {perror ("Failed to open evtchn device" );
@@ -108,7 +109,7 @@ int main(int argc, char *argv[])return 3 ; } -if ((rc =xc_evtchn_bind_virq (xce_handle,VIRQ_ENOMEM )) ==-1 ) +if ((rc =xenevtchn_bind_virq (xce_handle,VIRQ_ENOMEM )) ==-1 ) {perror ("Failed to bind to domain exception virq port" );return 4 ;
@@ -120,7 +121,7 @@ int main(int argc, char *argv[]) {evtchn_port_t port; -if ((port =xc_evtchn_pending (xce_handle)) ==-1 ) +if ((port =xenevtchn_pending (xce_handle)) ==-1 ) {perror ("Failed to listen for pending event channel" );return 5 ;
@@ -134,7 +135,7 @@ int main(int argc, char *argv[])return 6 ; } -if (xc_evtchn_unmask (xce_handle, port) ==-1 ) +if (xenevtchn_unmask (xce_handle, port) ==-1 ) {perror ("Failed to unmask port" );return 7 ;
tools/ocaml/libs/eventchn/Makefile +2 -2
@@ -2,13 +2,13 @@ TOPLEVEL=$(CURDIR)/../.. XEN_ROOT=$(TOPLEVEL)/../.. include $(TOPLEVEL)/common.make -CFLAGS += $(CFLAGS_libxenctrl) $(CFLAGS_xeninclude) +CFLAGS += $(CFLAGS_libxenevtchn) $(CFLAGS_xeninclude)
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tools/ocaml/libs/eventchn/xeneventchn_stubs.c +10 -10
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Signature · 7 lines
2.1.4 _______________________________________________ Xen-devel mailing list [email protected] http://lists.xen.org/xen-devel
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Re: [PATCH XEN v7 04/29] tools: Refactor /dev/xen/evtchn wrappers into libxenevtchn.
tools/libs/evtchn/Makefile line 65
Quoted 10 lines · Ian Campbell
tools/libs/evtchn/Makefile new file +4
-0+ +.PHONY: clean +clean: + rm -rf *.rpm $(LIB) *~ $(DEPS) $(LIB_OBJS) $(PIC_OBJS)
This, and presumably all the subsequent patches adding new libraries, needs a distclean and to remote the .so file, as Juergen did for libxentoollog in
http://lists.xenproject.org/archives/html/xen-devel/2016-01/msg00611.html
Ian.
PATCH v7 5/29 tools: Arrange to check public headers for ANSI compatiblity
In reply to Ian CampbellUsing the same rune as we use for the Xen public headers, except we do not need stdint.h here.
---
v7: Drop -pendantic: Some library headers include parts of
xen/include/public, which in turn are not -pedantic clean Retained ack, hope that's ok.
--- .gitignore | 2 ++ tools/Rules.mk | 8 ++++++++ tools/libs/evtchn/Makefile | 4 +++- tools/libs/toollog/Makefile | 5 ++++- 4 files changed, 17 insertions(+), 2 deletions(-)
.gitignore +2 -0
@@ -86,6 +86,8 @@ tools/config.cache config/Tools.mk config/Stubdom.mk config/Docs.mk +tools/libs/toollog/headers.chk +tools/libs/evtchn/headers.chk tools/blktap2/daemon/blktapctrl tools/blktap2/drivers/img2qcow tools/blktap2/drivers/lock-util
tools/Rules.mk +8 -0
@@ -176,6 +176,14 @@ INSTALL_PYTHON_PROG = \ %.opic: %.S $(CC) $(CPPFLAGS) -DPIC $(CFLAGS) $(CFLAGS.opic) -fPIC -c -o $@ $< $(APPEND_CFLAGS) +headers.chk: + for i in $(filter %.h,$^); do \ + $(CC) -x c -ansi -Wall -Werror $(CFLAGS_xeninclude) \ + -S -o /dev/null $$i || exit 1; \ + echo $$i; \ + done >[email protected] + mv [email protected] $@ + subdirs-all subdirs-clean subdirs-install subdirs-distclean: .phony @set -e; for subdir in $(SUBDIRS) $(SUBDIRS-y); do \ $(MAKE) subdir-$(patsubst subdirs-%,%,$@)-$$subdir; \
tools/libs/evtchn/Makefile +3 -1
@@ -32,8 +32,9 @@ build: $(MAKE) libs .PHONY: libs -libs: $(LIB) +libs: headers.chk $(LIB) +headers.chk: $(wildcard include/*.h) libxenevtchn.a: $(LIB_OBJS) $(AR) rc $@ $^
@@ -63,3 +64,4 @@ TAGS: .PHONY: clean clean: rm -rf *.rpm $(LIB) *~ $(DEPS) $(LIB_OBJS) $(PIC_OBJS) + rm -f headers.chk
tools/libs/toollog/Makefile +4 -1
@@ -27,7 +27,9 @@ build: $(MAKE) libs .PHONY: libs -libs: $(LIB) +libs: headers.chk $(LIB) + +headers.chk: $(wildcard include/*.h) libxentoollog.a: $(LIB_OBJS) $(AR) rc $@ $^
@@ -57,3 +59,4 @@ TAGS: .PHONY: clean clean: rm -rf *.rpm $(LIB) *~ $(DEPS) $(LIB_OBJS) $(PIC_OBJS) + rm -f headers.chk
Signature · 1 line
2.1.4
PATCH v7 6/29 tools/libxc: Remove osdep indirection for xc_gnt{shr, tab}
In reply to Ian CampbellThe alternative backend (a xen-api/xapi shim) is no longer around and so this stuff is now just baggage which is getting in the way of refactoring libxenctrl.
Nested virt probably suffices for this use case now.
It is now necessary to provide explicit versions of things for platforms which do not implement this functionality, since the osdep dispatcher cannot fulfil this need any more. These are provided by appropriate xc_nognt???.c files which are compiled and linked on the appropriate platforms. In them open and close return failure and everything else aborts, since if open fails they should never be called.
--- tools/libxc/Makefile | 10 ++-- tools/libxc/include/xenctrl.h | 4 +- tools/libxc/include/xenctrlosdep.h | 23 ------- tools/libxc/xc_gnttab.c | 57 ++++-------------- tools/libxc/xc_linux_osdep.c | 119 +++++++++++++++---------------------- tools/libxc/xc_minios.c | 51 ++++++---------- tools/libxc/xc_nogntshr.c | 46 ++++++++++++++ tools/libxc/xc_nognttab.c | 50 ++++++++++++++++ tools/libxc/xc_private.c | 83 +++++++++++++++++++++----- tools/libxc/xc_private.h | 24 ++++++++ 10 files changed, 274 insertions(+), 193 deletions(-) create mode 100644 tools/libxc/xc_nogntshr.c create mode 100644 tools/libxc/xc_nognttab.c
tools/libxc/Makefile +5 -5
@@ -43,11 +43,11 @@ CTRL_SRCS-y += xc_resource.c CTRL_SRCS-$(CONFIG_X86) += xc_psr.c CTRL_SRCS-$(CONFIG_X86) += xc_pagetab.c CTRL_SRCS-$(CONFIG_Linux) += xc_linux.c xc_linux_osdep.c -CTRL_SRCS-$(CONFIG_FreeBSD) += xc_freebsd.c xc_freebsd_osdep.c -CTRL_SRCS-$(CONFIG_SunOS) += xc_solaris.c -CTRL_SRCS-$(CONFIG_NetBSD) += xc_netbsd.c -CTRL_SRCS-$(CONFIG_NetBSDRump) += xc_netbsd.c -CTRL_SRCS-$(CONFIG_MiniOS) += xc_minios.c +CTRL_SRCS-$(CONFIG_FreeBSD) += xc_freebsd.c xc_freebsd_osdep.c xc_nognttab.c xc_nogntshr.c +CTRL_SRCS-$(CONFIG_SunOS) += xc_solaris.c xc_nognttab.c xc_nogntshr.c +CTRL_SRCS-$(CONFIG_NetBSD) += xc_netbsd.c xc_nognttab.c xc_nogntshr.c +CTRL_SRCS-$(CONFIG_NetBSDRump) += xc_netbsd.c xc_nognttab.c xc_nogntshr.c +CTRL_SRCS-$(CONFIG_MiniOS) += xc_minios.c xc_nogntshr.c CTRL_SRCS-y += xc_evtchn_compat.c GUEST_SRCS-y :=
tools/libxc/include/xenctrl.h +2 -2
@@ -117,8 +117,8 @@*/ typedef struct xc_interface_core xc_interface ; -typedef struct xc_interface_core xc_gnttab ; -typedef struct xc_interface_core xc_gntshr ; +typedef struct xengntdev_handle xc_gnttab ; +typedef struct xengntdev_handle xc_gntshr ;enum xc_error_code {XC_ERROR_NONE =0 ,
tools/libxc/include/xenctrlosdep.h +0 -23
@@ -51,8 +51,6 @@enum xc_osdep_type {XC_OSDEP_PRIVCMD , -XC_OSDEP_GNTTAB , -XC_OSDEP_GNTSHR , };/* Opaque handle internal to the backend */
@@ -88,27 +86,6 @@ struct xc_osdep_ops size_t chunksize, privcmd_mmap_entry_t entries[], int nentries); } privcmd; -struct { -#define XC_GRANT_MAP_SINGLE_DOMAIN 0x1 -void *(*grant_map)(xc_gnttab *xcg,xc_osdep_handle h, -uint32_t count,int flags,int prot, -uint32_t *domids,uint32_t *refs, -uint32_t notify_offset, -evtchn_port_t notify_port); -int (*munmap)(xc_gnttab *xcg,xc_osdep_handle h, -void *start_address, -uint32_t count); -int (*set_max_grants)(xc_gnttab *xcg,xc_osdep_handle h,uint32_t count); - } gnttab; -struct { -void *(*share_pages)(xc_gntshr *xcg,xc_osdep_handle h, -uint32_t domid,int count, -uint32_t *refs,int writable, -uint32_t notify_offset, -evtchn_port_t notify_port); -int (*munmap)(xc_gntshr *xcg,xc_osdep_handle h, -void *start_address,uint32_t count); - } gntshr; } u; };typedef struct xc_osdep_ops xc_osdep_ops ;
tools/libxc/xc_gnttab.c +13 -44
103 lines not on this page · raw message
tools/libxc/xc_linux_osdep.c +47 -72
235 lines not on this page · raw message
tools/libxc/xc_minios.c +19 -32
97 lines not on this page · raw message
tools/libxc/xc_nogntshr.c new file +46 -0
46 lines not on this page · raw message
tools/libxc/xc_nognttab.c new file +50 -0
50 lines not on this page · raw message
tools/libxc/xc_private.c +68 -15
106 lines not on this page · raw message
tools/libxc/xc_private.h +24 -0
@@ -123,6 +123,30 @@ struct xc_interface_core {xc_osdep_handle ops_handle;/* opaque data for xc_osdep_ops */ }; +struct xengntdev_handle { +xentoollog_logger *logger, *logger_tofree; +int fd; +}; + +int osdep_gnttab_open (xc_gnttab *xgt); +int osdep_gnttab_close (xc_gnttab *xgt); + +#define XC_GRANT_MAP_SINGLE_DOMAIN 0x1 +void *osdep_gnttab_grant_map (xc_gnttab *xgt, +uint32_t count,int flags,int prot, +uint32_t *domids,uint32_t *refs, +uint32_t notify_offset, +evtchn_port_t notify_port); + +int osdep_gntshr_open (xc_gntshr *xgs); +int osdep_gntshr_close (xc_gntshr *xgs); + +void *osdep_gntshr_share_pages (xc_gntshr *xgs, +uint32_t domid,int count, +uint32_t *refs,int writable, +uint32_t notify_offset, +evtchn_port_t notify_port); +void xc_report_error (xc_interface *xch,int code,const char *fmt, ...) __attribute__((format (printf,3 ,4 ))); void xc_reportv(xc_interface *xch, xentoollog_logger *lg, xentoollog_level,
Signature · 1 line
2.1.4
PATCH v7 7/29 tools: Refactor /dev/xen/gnt{dev, shr} wrappers into libxengnttab.
In reply to Ian Campbelllibxengnttab will provide a stable API and ABI for accessing the grant table devices.
The functions are moved into the xengnt{tab,shr} namespace to make a clean break from libxc and avoid ambiguity regarding which interfaces are stable.
All in-tree users are updated to use the new names.
Upon request (via #define XC_WANT_COMPAT_GNTTAB_API) libxenctrl will provide a compat API for the old names. This is used by qemu-xen for the time being. qemu-xen-traditional is updated in lockstep.
This leaves a few grant table related functions which go via privcmd (EVTCHNOP) rather than ioctls on the /dev/xen/gnt* devices in libxenctrl. Specifically:
- xc_gnttab_get_version
- xc_gnttab_map_table_v1
- xc_gnttab_map_table_v2
- xc_gnttab_op
These functions do not appear to be needed by qemu-dm, qemu-pv (provision of device model to HVM guests and PV backends respectively) or by libvchan suggesting they are not needed by non-toolstack uses of event channels.
The new library uses a version script to ensure that only expected symbols are exported and to version them such that ABI guarantees can be kept in the future.
After this change libxenvchan no longer needs to link against libxenctrl. It still needs xenctrl.h in one file for xen_mb and friends.
---
Must be applied with:
- "qemu-xen-traditional: Use libxengnttab" and a corresponding QEMU_TAG update folded here.
- "mini-os: Include libxengnttab with libxc"" and a corresponding bump to MINIOS_UPSTREAM_REVISION folded in here.
v3:
- Remove SHLIB_libxenctrl from SHDEPS_libxenvchan, and replace with SHLIB_libxentoollog.
- Move to tools/libs/gnttab
- Adjust for rebase over 31cf2ca75181 "tools/libxc: linux: Don't use getpagesize() when unmapping the grants"
v5: Allow _close(NULL).
v6: The extensive API document updates from the previous round of
review have been implemented in "tools/libs/gnttab: Extensive updates to API documentation." later in the series, so as not to add further functional changes than already required to this refactoring patch.
v7: Added mk-headers-$(XEN_TARGET_ARCH) build dependency instead of
open coding the recursion. s/gnttab_munmap/gnttab_unmap/ and s/gntshr_munmap/gntshr_unshare/ in the API and equivalents in the internals/osdeps etc.
---
.gitignore | 2 +
stubdom/Makefile | 17 +-
tools/Makefile | 3 +
tools/Rules.mk | 14 +-
tools/console/Makefile | 5 +-
tools/console/daemon/io.c | 21 +-
tools/libs/Makefile | 1 +
tools/libs/evtchn/minios.c | 5 +-
tools/libs/gnttab/Makefile | 69 +++++
tools/libs/gnttab/gntshr_core.c | 95 ++++++
.../xc_nognttab.c => libs/gnttab/gntshr_unimp.c} | 34 ++-
tools/libs/gnttab/gnttab_core.c | 124 ++++++++
tools/libs/gnttab/gnttab_unimp.c | 89 ++++++
tools/libs/gnttab/include/xengnttab.h | 216 ++++++++++++++
tools/libs/gnttab/libxengnttab.map | 23 ++
tools/libs/gnttab/linux.c | 329 +++++++++++++++++++++
tools/libs/gnttab/minios.c | 117 ++++++++
tools/libs/gnttab/private.h | 47 +++
tools/libvchan/Makefile | 8 +-
tools/libvchan/init.c | 26 +-
tools/libvchan/io.c | 8 +-
tools/libvchan/libxenvchan.h | 6 +-
tools/libxc/Makefile | 15 +-
tools/libxc/include/xenctrl.h | 168 -----------
tools/libxc/include/xenctrl_compat.h | 48 +++
tools/libxc/xc_gnttab.c | 53 ----
tools/libxc/xc_gnttab_compat.c | 111 +++++++
tools/libxc/xc_linux_osdep.c | 280 ------------------
tools/libxc/xc_minios.c | 73 -----
tools/libxc/xc_nogntshr.c | 46 ---
tools/libxc/xc_private.c | 80 -----
tools/libxc/xc_private.h | 24 --
tools/xenstore/Makefile | 4 +-
tools/xenstore/xenstored_core.h | 4 +-
tools/xenstore/xenstored_domain.c | 24 +-
tools/xenstore/xenstored_minios.c | 5 +-
36 files changed, 1393 insertions(+), 801 deletions(-)
create mode 100644 tools/libs/gnttab/Makefile
create mode 100644 tools/libs/gnttab/gntshr_core.c
rename tools/{libxc/xc_nognttab.c => libs/gnttab/gntshr_unimp.c} (52%)
create mode 100644 tools/libs/gnttab/gnttab_core.c
create mode 100644 tools/libs/gnttab/gnttab_unimp.c
create mode 100644 tools/libs/gnttab/include/xengnttab.h
create mode 100644 tools/libs/gnttab/libxengnttab.map
create mode 100644 tools/libs/gnttab/linux.c
create mode 100644 tools/libs/gnttab/minios.c
create mode 100644 tools/libs/gnttab/private.h
create mode 100644 tools/libxc/xc_gnttab_compat.c
delete mode 100644 tools/libxc/xc_nogntshr.c.gitignore +2 -0
@@ -60,6 +60,7 @@ stubdom/ioemu stubdom/xenstore stubdom/libxentoollog-* stubdom/libxenevtchn-* +stubdom/libxengnttab-* stubdom/libxc-* stubdom/lwip-* stubdom/mini-os-*
@@ -88,6 +89,7 @@ config/Stubdom.mk config/Docs.mk tools/libs/toollog/headers.chk tools/libs/evtchn/headers.chk +tools/libs/gnttab/headers.chk tools/blktap2/daemon/blktapctrl tools/blktap2/drivers/img2qcow tools/blktap2/drivers/lock-util
stubdom/Makefile +16 -1
@@ -325,6 +325,12 @@ mk-headers-$(XEN_TARGET_ARCH): $(IOEMU_LINKFARM_TARGET) ln -sf $(XEN_ROOT)/tools/libs/evtchn/include/*.h include/ && \ ln -sf $(XEN_ROOT)/tools/libs/evtchn/*.c . && \ ln -sf $(XEN_ROOT)/tools/libs/evtchn/Makefile . ) + mkdir -p libs-$(XEN_TARGET_ARCH)/gnttab/include + [ -h libs-$(XEN_TARGET_ARCH)/gnttab/Makefile ] || ( cd libs-$(XEN_TARGET_ARCH)/gnttab && \ + ln -sf $(XEN_ROOT)/tools/libs/gnttab/*.h . && \ + ln -sf $(XEN_ROOT)/tools/libs/gnttab/include/*.h include/ && \ + ln -sf $(XEN_ROOT)/tools/libs/gnttab/*.c . && \ + ln -sf $(XEN_ROOT)/tools/libs/gnttab/Makefile . ) mkdir -p libxc-$(XEN_TARGET_ARCH) [ -h libxc-$(XEN_TARGET_ARCH)/Makefile ] || ( cd libxc-$(XEN_TARGET_ARCH) && \ ln -sf $(XEN_ROOT)/tools/libxc/*.h . && \
@@ -366,12 +372,21 @@ libs-$(XEN_TARGET_ARCH)/evtchn/libxenevtchn.a: mk-headers-$(XEN_TARGET_ARCH) $(N CPPFLAGS="$(TARGET_CPPFLAGS)" CFLAGS="$(TARGET_CFLAGS)" $(MAKE) DESTDIR= -C libs-$(XEN_TARGET_ARCH)/evtchn ####### +# libxengnttab +####### + +.PHONY: libxengnttab +libxengnttab: libs-$(XEN_TARGET_ARCH)/gnttab/libxengnttab.a +libs-$(XEN_TARGET_ARCH)/gnttab/libxengnttab.a: mk-headers-$(XEN_TARGET_ARCH) $(NEWLIB_STAMPFILE) + CPPFLAGS="$(TARGET_CPPFLAGS)" CFLAGS="$(TARGET_CFLAGS)" $(MAKE) DESTDIR= -C libs-$(XEN_TARGET_ARCH)/gnttab + +####### # libxc ####### .PHONY: libxc libxc: libxc-$(XEN_TARGET_ARCH)/libxenctrl.a libxc-$(XEN_TARGET_ARCH)/libxenguest.a -libxc-$(XEN_TARGET_ARCH)/libxenctrl.a: mk-headers-$(XEN_TARGET_ARCH) libxentoollog libxenevtchn cross-zlib +libxc-$(XEN_TARGET_ARCH)/libxenctrl.a: mk-headers-$(XEN_TARGET_ARCH) libxentoollog libxenevtchn libxengnttab cross-zlib CPPFLAGS="$(TARGET_CPPFLAGS)" CFLAGS="$(TARGET_CFLAGS)" $(MAKE) DESTDIR= CONFIG_LIBXC_MINIOS=y -C libxc-$(XEN_TARGET_ARCH) libxc-$(XEN_TARGET_ARCH)/libxenguest.a: libxc-$(XEN_TARGET_ARCH)/libxenctrl.a
tools/Makefile +3 -0
@@ -249,9 +249,11 @@ subdir-all-qemu-xen-dir: qemu-xen-dir-find --includedir=$(LIBEXEC_INC) \ --source-path=$$source \ --extra-cflags="-DXC_WANT_COMPAT_EVTCHN_API=1 \ + -DXC_WANT_COMPAT_GNTTAB_API=1 \ -I$(XEN_ROOT)/tools/include \ -I$(XEN_ROOT)/tools/libs/toollog/include \ -I$(XEN_ROOT)/tools/libs/evtchn/include \ + -I$(XEN_ROOT)/tools/libs/gnttab/include \ -I$(XEN_ROOT)/tools/libxc/include \ -I$(XEN_ROOT)/tools/xenstore/include \ -I$(XEN_ROOT)/tools/xenstore/compat/include \
@@ -260,6 +262,7 @@ subdir-all-qemu-xen-dir: qemu-xen-dir-find -L$(XEN_ROOT)/tools/xenstore \ -Wl,-rpath-link=$(XEN_ROOT)/tools/libs/toollog \ -Wl,-rpath-link=$(XEN_ROOT)/tools/libs/evtchn \ + -Wl,-rpath-link=$(XEN_ROOT)/tools/libs/gnttab \ $(QEMU_UPSTREAM_RPATH)" \ --bindir=$(LIBEXEC_BIN) \ --datadir=$(SHAREDIR)/qemu-xen \
tools/Rules.mk +12 -2
@@ -12,6 +12,7 @@ INSTALL = $(XEN_ROOT)/tools/cross-install XEN_INCLUDE = $(XEN_ROOT)/tools/include XEN_LIBXENTOOLLOG = $(XEN_ROOT)/tools/libs/toollog XEN_LIBXENEVTCHN = $(XEN_ROOT)/tools/libs/evtchn +XEN_LIBXENGNTTAB = $(XEN_ROOT)/tools/libs/gnttab XEN_LIBXC = $(XEN_ROOT)/tools/libxc XEN_XENLIGHT = $(XEN_ROOT)/tools/libxl XEN_XENSTORE = $(XEN_ROOT)/tools/xenstore
@@ -88,8 +89,17 @@ SHDEPS_libxenevtchn = LDLIBS_libxenevtchn = $(XEN_LIBXENEVTCHN)/libxenevtchn$(libextension) SHLIB_libxenevtchn = -Wl,-rpath-link=$(XEN_LIBXENEVTCHN) +CFLAGS_libxengnttab = -I$(XEN_LIBXENGNTTAB)/include $(CFLAGS_xeninclude) +LDLIBS_libxengnttab = $(XEN_LIBXENGNTTAB)/libxengnttab$(libextension) +SHLIB_libxengnttab = -Wl,-rpath-link=$(XEN_LIBXENGNTTAB) + +# xengntshr_* interfaces are actually part of libxengnttab.so +CFLAGS_libxengntshr = -I$(XEN_LIBXENGNTTAB)/include $(CFLAGS_xeninclude) +LDLIBS_libxengntshr = $(XEN_LIBXENGNTTAB)/libxengnttab$(libextension) +SHLIB_libxengntshr = -Wl,-rpath-link=$(XEN_LIBXENGNTTAB) + CFLAGS_libxenctrl = -I$(XEN_LIBXC)/include $(CFLAGS_libxentoollog) $(CFLAGS_xeninclude) -SHDEPS_libxenctrl = $(SHLIB_libxentoollog) $(SHLIB_libxenevtchn) +SHDEPS_libxenctrl = $(SHLIB_libxentoollog) $(SHLIB_libxenevtchn) $(SHLIB_libxengnttab) $(SHLIB_libxengntshr) LDLIBS_libxenctrl = $(SHDEPS_libxenctrl) $(XEN_LIBXC)/libxenctrl$(libextension) SHLIB_libxenctrl = $(SHDEPS_libxenctrl) -Wl,-rpath-link=$(XEN_LIBXC)
@@ -109,7 +119,7 @@ LDLIBS_libxenstat = $(SHDEPS_libxenstat) $(XEN_LIBXENSTAT)/libxenstat$(libexten SHLIB_libxenstat = $(SHDEPS_libxenstat) -Wl,-rpath-link=$(XEN_LIBXENSTAT) CFLAGS_libxenvchan = -I$(XEN_LIBVCHAN) -SHDEPS_libxenvchan = $(SHLIB_libxenctrl) $(SHLIB_libxenstore) $(SHLIB_libxenevtchn) +SHDEPS_libxenvchan = $(SHLIB_libxentoollog) $(SHLIB_libxenstore) $(SHLIB_libxenevtchn) $(SHLIB_libxengnttab) $(SHLIB_libxengntshr) LDLIBS_libxenvchan = $(SHDEPS_libxenvchan) $(XEN_LIBVCHAN)/libxenvchan$(libextension) SHLIB_libxenvchan = $(SHDEPS_libxenvchan) -Wl,-rpath-link=$(XEN_LIBVCHAN)
tools/console/Makefile +2 -3
@@ -3,10 +3,8 @@ include $(XEN_ROOT)/tools/Rules.mk CFLAGS += -Werror -CFLAGS += $(CFLAGS_libxenevtchn) CFLAGS += $(CFLAGS_libxenctrl) CFLAGS += $(CFLAGS_libxenstore) -LDLIBS += $(LDLIBS_libxenevtchn) LDLIBS += $(LDLIBS_libxenctrl) LDLIBS += $(LDLIBS_libxenstore) LDLIBS += $(SOCKET_LIBS)
@@ -28,8 +26,9 @@ clean: .PHONY: distclean distclean: clean +daemon/io.o: CFLAGS += $(CFLAGS_libxenevtchn) $(CFLAGS_libxengnttab) xenconsoled: $(patsubst %.c,%.o,$(wildcard daemon/*.c)) - $(CC) $(LDFLAGS) $^ -o $@ $(LDLIBS) $(LDLIBS_xenconsoled) $(APPEND_LDFLAGS) + $(CC) $(LDFLAGS) $^ -o $@ $(LDLIBS) $(LDLIBS_libxenevtchn) $(LDLIBS_libxengnttab) $(LDLIBS_xenconsoled) $(APPEND_LDFLAGS) xenconsole: client/_paths.h $(patsubst %.c,%.o,$(wildcard client/*.c)) $(CC) $(LDFLAGS) $^ -o $@ $(LDLIBS) $(LDLIBS_xenconsole) $(APPEND_LDFLAGS)
tools/console/daemon/io.c +11 -10
@@ -22,6 +22,7 @@#include "utils.h" #include "io.h" #include <xenevtchn.h> +#include <xengnttab.h> #include <xenstore.h> #include <xen/io/console.h> #include <xen/grant_table.h>
@@ -72,7 +73,7 @@ static int log_time_hv_needts = 1;static int log_time_guest_needts =1 ;static int log_hv_fd =-1 ; -static xc_gnttab *xcg_handle =NULL ; +static xengnttab_handle *xgt_handle =NULL ;static struct pollfd *fds;static unsigned int current_array_size;
@@ -520,8 +521,8 @@ static void domain_unmap_interface(struct domain *dom) {if (dom->interface ==NULL )return ; -if (xcg_handle && dom->ring_ref ==-1 ) -xc_gnttab_munmap (xcg_handle, dom->interface,1 ); +if (xgt_handle && dom->ring_ref ==-1 ) +xengnttab_unmap (xgt_handle, dom->interface,1 );else munmap (dom->interface,XC_PAGE_SIZE ); dom->interface =NULL ;
@@ -552,9 +553,9 @@ static int domain_create_ring(struct domain *dom)if (ring_ref != dom->ring_ref && dom->ring_ref !=-1 )domain_unmap_interface (dom); -if (!dom->interface && xcg_handle) { +if (!dom->interface && xgt_handle) {/* Prefer using grant table */ - dom->interface =xc_gnttab_map_grant_ref (xcg_handle, + dom->interface =xengnttab_map_grant_ref (xgt_handle, dom->domid,GNTTAB_RESERVED_CONSOLE ,PROT_READ |PROT_WRITE ); dom->ring_ref =-1 ;
@@ -1029,8 +1030,8 @@ void handle_io(void)handle_hv_logs (xce_handle, true); } - xcg_handle =xc_gnttab_open (NULL ,0 ); -if (xcg_handle ==NULL ) { + xgt_handle =xengnttab_open (NULL ,0 ); +if (xgt_handle ==NULL ) {dolog (LOG_DEBUG ,"Failed to open xcg handle: %d (%s)" , errno,strerror (errno)); }
@@ -1206,9 +1207,9 @@ void handle_io(void)xenevtchn_close (xce_handle); xce_handle =NULL ; } -if (xcg_handle !=NULL ) { -xc_gnttab_close (xcg_handle); - xcg_handle =NULL ; +if (xgt_handle !=NULL ) { +xengnttab_close (xgt_handle); + xgt_handle =NULL ; } log_hv_evtchn =-1 ; }
tools/libs/Makefile +1 -0
@@ -4,5 +4,6 @@ include $(XEN_ROOT)/tools/Rules.mk SUBDIRS-y := SUBDIRS-y += toollog SUBDIRS-y += evtchn +SUBDIRS-y += gnttab all clean install distclean: %: subdirs-%
tools/libs/evtchn/minios.c +1 -4
@@ -27,13 +27,12 @@#include <mini-os/events.h> #include <mini-os/wait.h> -#include <sys/socket.h> -#include <assert.h> #include <errno.h> #include <fcntl.h> #include <stdio.h> #include <stdint.h> +#include <unistd.h> #include <inttypes.h> #include <malloc.h>
@@ -43,8 +42,6 @@ extern void minios_evtchn_close_fd(int fd);extern struct wait_queue_head event_queue; -//void minios_evtchn_close_fd(int fd); -/* XXX Note: This is not threadsafe */ static struct evtchn_port_info *port_alloc (int fd) {struct evtchn_port_info *port_info;
tools/libs/gnttab/Makefile new file +69 -0
69 lines not on this page · raw message
tools/libs/gnttab/gntshr_core.c new file +95 -0
95 lines not on this page · raw message
tools/libs/gnttab/gntshr_unimp.c renamed from tools/libxc/xc_nognttab.c +23 -11
@@ -14,37 +14,49 @@* * You should have received a copy of the GNU Lesser General Public * License along with this library; If not, see <http://www.gnu.org/licenses/>. +* +* Split out from xc_gnttab.c */ #include <stdlib.h> -#include "xc_private.h" +#include "private.h" -int osdep_gnttab_open (xc_gnttab *xgt) +xengntshr_handle *xengntshr_open (xentoollog_logger *logger,unsigned open_flags) { -return -1 ; +return NULL ; } -int osdep_gnttab_close (xc_gnttab *xgt) +int xengntshr_close (xengntshr_handle *xgs) {return 0 ; } -int xc_gnttab_set_max_grants (xc_gnttab *xgt,uint32_t count) +void *xengntshr_share_pages (xengntshr_handle *xcg,uint32_t domid, +int count,uint32_t *refs,int writable) {abort (); } -void *osdep_gnttab_grant_map (xc_gnttab *xgt, -uint32_t count,int flags,int prot, -uint32_t *domids,uint32_t *refs, -uint32_t notify_offset, -evtchn_port_t notify_port) +void *xengntshr_share_page_notify (xengntshr_handle *xcg,uint32_t domid, +uint32_t *ref,int writable, +uint32_t notify_offset, +evtchn_port_t notify_port) {abort (); } -int xc_gnttab_munmap (xc_gnttab *xgt,void *start_address,uint32_t count) +int xengntshr_unshare (xengntshr_handle *xgs,void *start_address,uint32_t count) {abort (); } + +/* +* Local variables: +* mode: C +* c-file-style: "BSD" +* c-basic-offset: 4 +* tab-width: 4 +* indent-tabs-mode: nil +* End: +*/
tools/libs/gnttab/gnttab_core.c new file +124 -0
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tools/libs/gnttab/gnttab_unimp.c new file +89 -0
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tools/libs/gnttab/include/xengnttab.h new file +216 -0
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tools/libs/gnttab/libxengnttab.map new file +23 -0
@@ -0,0 +1,23 @@ +VERS_1.0 { + global: + xengnttab_open; + xengnttab_close; + + xengnttab_set_max_grants; + + xengnttab_map_domain_grant_refs; + xengnttab_map_grant_ref; + xengnttab_map_grant_ref_notify; + xengnttab_map_grant_refs; + + xengnttab_unmap; + + xengntshr_open; + xengntshr_close; + + xengntshr_share_page_notify; + xengntshr_share_pages; + + xengntshr_unshare; + local: *; /* Do not expose anything by default */ +};
tools/libs/gnttab/linux.c new file +329 -0
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tools/libs/gnttab/minios.c new file +117 -0
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tools/libs/gnttab/private.h new file +47 -0
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tools/libvchan/Makefile +5 -3
@@ -10,15 +10,17 @@ NODE_OBJS = node.o NODE2_OBJS = node-select.o LIBVCHAN_PIC_OBJS = $(patsubst %.o,%.opic,$(LIBVCHAN_OBJS)) -LIBVCHAN_LIBS = $(LDLIBS_libxenstore) $(LDLIBS_libxenctrl) $(LDLIBS_libxenevtchn) -$(LIBVCHAN_OBJS) $(LIBVCHAN_PIC_OBJS): CFLAGS += $(CFLAGS_libxenstore) $(CFLAGS_libxenctrl) $(CFLAGS_libxenevtchn) -$(NODE_OBJS) $(NODE2_OBJS): CFLAGS += $(CFLAGS_libxenctrl) $(CFLAGS_libxenevtchn) +LIBVCHAN_LIBS = $(LDLIBS_libxenstore) $(LDLIBS_libxengnttab) $(LDLIBS_libxengntshr) $(LDLIBS_libxenevtchn) +$(LIBVCHAN_OBJS) $(LIBVCHAN_PIC_OBJS): CFLAGS += $(CFLAGS_libxenstore) $(CFLAGS_libxengnttab) $(CFLAGS_libxengntshr) $(CFLAGS_libxenevtchn) +$(NODE_OBJS) $(NODE2_OBJS): CFLAGS += $(CFLAGS_libxengnttab) $(CFLAGS_libxengntshr) $(CFLAGS_libxenevtchn) MAJOR = 1.0 MINOR = 0 CFLAGS += -I../include -I. +io.o io.opic: CFLAGS += $(CFLAGS_libxenctrl) # for xen_mb et al + .PHONY: all all: libxenvchan.so vchan-node1 vchan-node2 libxenvchan.a
tools/libvchan/init.c +13 -13
@@ -78,7 +78,7 @@ static int init_gnt_srv(struct libxenvchan *ctrl, int domain)uint32_t ring_ref =-1 ;void *ring; - ring =xc_gntshr_share_page_notify (ctrl->gntshr, domain, + ring =xengntshr_share_page_notify (ctrl->gntshr, domain, &ring_ref,1 , offsetof(struct vchan_interface , srv_live), ctrl->event_port);
@@ -104,7 +104,7 @@ static int init_gnt_srv(struct libxenvchan *ctrl, int domain) ctrl->read.buffer = ((void *)ctrl->ring) +LARGE_RING_OFFSET ;break ;default : - ctrl->read.buffer =xc_gntshr_share_pages (ctrl->gntshr, domain, + ctrl->read.buffer =xengntshr_share_pages (ctrl->gntshr, domain, pages_left, ctrl->ring->grants,1 );if (!ctrl->read.buffer) goto out_ring;
@@ -118,7 +118,7 @@ static int init_gnt_srv(struct libxenvchan *ctrl, int domain) ctrl->write.buffer = ((void *)ctrl->ring) +LARGE_RING_OFFSET ;break ;default : - ctrl->write.buffer =xc_gntshr_share_pages (ctrl->gntshr, domain, + ctrl->write.buffer =xengntshr_share_pages (ctrl->gntshr, domain, pages_right, ctrl->ring->grants + pages_left,1 );if (!ctrl->write.buffer) goto out_unmap_left;
@@ -128,9 +128,9 @@ out:return ring_ref; out_unmap_left:if (pages_left) -xc_gntshr_munmap (ctrl->gntshr, ctrl->read.buffer, pages_left); +xengntshr_unshare (ctrl->gntshr, ctrl->read.buffer, pages_left); out_ring: -xc_gntshr_munmap (ctrl->gntshr, ring,1 ); +xengntshr_unshare (ctrl->gntshr, ring,1 ); ring_ref =-1 ; ctrl->ring =NULL ; ctrl->write.order = ctrl->read.order =0 ;
@@ -142,7 +142,7 @@ static int init_gnt_cli(struct libxenvchan *ctrl, int domain, uint32_t ring_ref)int rv =-1 ;uint32_t *grants; - ctrl->ring =xc_gnttab_map_grant_ref_notify (ctrl->gnttab, + ctrl->ring =xengnttab_map_grant_ref_notify (ctrl->gnttab, domain, ring_ref,PROT_READ |PROT_WRITE , offsetof(struct vchan_interface , cli_live), ctrl->event_port);
@@ -172,7 +172,7 @@ static int init_gnt_cli(struct libxenvchan *ctrl, int domain, uint32_t ring_ref)default : {int pages_left =1 << (ctrl->write.order -PAGE_SHIFT ); - ctrl->write.buffer =xc_gnttab_map_domain_grant_refs (ctrl->gnttab, + ctrl->write.buffer =xengnttab_map_domain_grant_refs (ctrl->gnttab, pages_left, domain, grants,PROT_READ |PROT_WRITE );if (!ctrl->write.buffer) goto out_unmap_ring;
@@ -190,7 +190,7 @@ static int init_gnt_cli(struct libxenvchan *ctrl, int domain, uint32_t ring_ref)default : {int pages_right =1 << (ctrl->read.order -PAGE_SHIFT ); - ctrl->read.buffer =xc_gnttab_map_domain_grant_refs (ctrl->gnttab, + ctrl->read.buffer =xengnttab_map_domain_grant_refs (ctrl->gnttab, pages_right, domain, grants,PROT_READ );if (!ctrl->read.buffer) goto out_unmap_left;
@@ -202,10 +202,10 @@ static int init_gnt_cli(struct libxenvchan *ctrl, int domain, uint32_t ring_ref)return rv; out_unmap_left:if (ctrl->write.order >=PAGE_SHIFT ) -xc_gnttab_munmap (ctrl->gnttab, ctrl->write.buffer, -1 << (ctrl->write.order -PAGE_SHIFT )); +xengnttab_unmap (ctrl->gnttab, ctrl->write.buffer, +1 << (ctrl->write.order -PAGE_SHIFT )); out_unmap_ring: -xc_gnttab_munmap (ctrl->gnttab, ctrl->ring,1 ); +xengnttab_unmap (ctrl->gnttab, ctrl->ring,1 ); ctrl->ring =0 ; ctrl->write.order = ctrl->read.order =0 ; rv =-1 ;
@@ -325,7 +325,7 @@ struct libxenvchan *libxenvchan_server_init(xentoollog_logger *logger, int domai ctrl->write.order =LARGE_RING_SHIFT ; } - ctrl->gntshr =xc_gntshr_open (logger,0 ); + ctrl->gntshr =xengntshr_open (logger,0 );if (!ctrl->gntshr) goto out;
@@ -413,7 +413,7 @@ struct libxenvchan *libxenvchan_client_init(xentoollog_logger *logger, int domaiif (!ctrl->event_port) goto fail; - ctrl->gnttab =xc_gnttab_open (logger,0 ); + ctrl->gnttab =xengnttab_open (logger,0 );if (!ctrl->gnttab) goto fail;
tools/libvchan/io.c +4 -4
@@ -364,10 +364,10 @@ void libxenvchan_close(struct libxenvchan *ctrl)if (ctrl->ring) {if (ctrl->is_server) { ctrl->ring->srv_live =0 ; -xc_gntshr_munmap (ctrl->gntshr, ctrl->ring,1 ); +xengntshr_unshare (ctrl->gntshr, ctrl->ring,1 ); }else { ctrl->ring->cli_live =0 ; -xc_gnttab_munmap (ctrl->gnttab, ctrl->ring,1 ); +xengnttab_unmap (ctrl->gnttab, ctrl->ring,1 ); } }if (ctrl->event) {
@@ -377,10 +377,10 @@ void libxenvchan_close(struct libxenvchan *ctrl) }if (ctrl->is_server) {if (ctrl->gntshr) -xc_gntshr_close (ctrl->gntshr); +xengntshr_close (ctrl->gntshr); }else {if (ctrl->gnttab) -xc_gnttab_close (ctrl->gnttab); +xengnttab_close (ctrl->gnttab); }free (ctrl); }
tools/libvchan/libxenvchan.h +3 -3
@@ -45,7 +45,7 @@#include <xen/io/libxenvchan.h> #include <xen/sys/evtchn.h> #include <xenevtchn.h> -#include <xenctrl.h> +#include <xengnttab.h> struct libxenvchan_ring {/* Pointer into the shared page. Offsets into buffer. */
@@ -66,8 +66,8 @@ struct libxenvchan_ring {struct libxenvchan {/* Mapping handle for shared ring page */ union { -xc_gntshr *gntshr;/* for server */ -xc_gnttab *gnttab;/* for client */ +xengntshr_handle *gntshr;/* for server */ +xengnttab_handle *gnttab;/* for client */ };/* Pointer to shared ring page */ struct vchan_interface *ring;
tools/libxc/Makefile +9 -6
@@ -43,12 +43,13 @@ CTRL_SRCS-y += xc_resource.c CTRL_SRCS-$(CONFIG_X86) += xc_psr.c CTRL_SRCS-$(CONFIG_X86) += xc_pagetab.c CTRL_SRCS-$(CONFIG_Linux) += xc_linux.c xc_linux_osdep.c -CTRL_SRCS-$(CONFIG_FreeBSD) += xc_freebsd.c xc_freebsd_osdep.c xc_nognttab.c xc_nogntshr.c -CTRL_SRCS-$(CONFIG_SunOS) += xc_solaris.c xc_nognttab.c xc_nogntshr.c -CTRL_SRCS-$(CONFIG_NetBSD) += xc_netbsd.c xc_nognttab.c xc_nogntshr.c -CTRL_SRCS-$(CONFIG_NetBSDRump) += xc_netbsd.c xc_nognttab.c xc_nogntshr.c -CTRL_SRCS-$(CONFIG_MiniOS) += xc_minios.c xc_nogntshr.c +CTRL_SRCS-$(CONFIG_FreeBSD) += xc_freebsd.c xc_freebsd_osdep.c +CTRL_SRCS-$(CONFIG_SunOS) += xc_solaris.c +CTRL_SRCS-$(CONFIG_NetBSD) += xc_netbsd.c +CTRL_SRCS-$(CONFIG_NetBSDRump) += xc_netbsd.c +CTRL_SRCS-$(CONFIG_MiniOS) += xc_minios.c CTRL_SRCS-y += xc_evtchn_compat.c +CTRL_SRCS-y += xc_gnttab_compat.c GUEST_SRCS-y := GUEST_SRCS-y += xg_private.c xc_suspend.c
@@ -126,6 +127,8 @@ OSDEP_PIC_OBJS := $(patsubst %.c,%.opic,$(OSDEP_SRCS-y)) $(CTRL_LIB_OBJS) $(GUEST_LIB_OBJS) $(OSDEP_LIB_OBJS) \ $(CTRL_PIC_OBJS) $(GUEST_PIC_OBJS) $(OSDEP_PIC_OBJS) : CFLAGS += -include $(XEN_ROOT)/tools/config.h +$(CTRL_LIB_OBJS) $(CTRL_PIC_OBJS): CFLAGS += $(CFLAGS_libxengnttab) $(CFLAGS_libxengntshr) + LIB := libxenctrl.a ifneq ($(nosharedlibs),y) LIB += libxenctrl.so libxenctrl.so.$(MAJOR) libxenctrl.so.$(MAJOR).$(MINOR)
@@ -209,7 +212,7 @@ libxenctrl.so.$(MAJOR): libxenctrl.so.$(MAJOR).$(MINOR) $(SYMLINK_SHLIB) $< $@ libxenctrl.so.$(MAJOR).$(MINOR): $(CTRL_PIC_OBJS) - $(CC) $(LDFLAGS) $(PTHREAD_LDFLAGS) -Wl,$(SONAME_LDFLAG) -Wl,libxenctrl.so.$(MAJOR) $(SHLIB_LDFLAGS) -o $@ $^ $(LDLIBS_libxentoollog) $(LDLIBS_libxenevtchn) $(DLOPEN_LIBS) $(PTHREAD_LIBS) $(APPEND_LDFLAGS) + $(CC) $(LDFLAGS) $(PTHREAD_LDFLAGS) -Wl,$(SONAME_LDFLAG) -Wl,libxenctrl.so.$(MAJOR) $(SHLIB_LDFLAGS) -o $@ $^ $(LDLIBS_libxentoollog) $(LDLIBS_libxenevtchn) $(LDLIBS_libxengnttab) $(LDLIBS_libxengntshr) $(DLOPEN_LIBS) $(PTHREAD_LIBS) $(APPEND_LDFLAGS) # libxenguest
tools/libxc/include/xenctrl.h +0 -168
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tools/libxc/include/xenctrl_compat.h +48 -0
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tools/libxc/xc_gnttab.c +0 -53
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tools/libxc/xc_gnttab_compat.c new file +111 -0
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tools/libxc/xc_linux_osdep.c +0 -280
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tools/libxc/xc_minios.c +0 -73
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tools/libxc/xc_nogntshr.c deleted +0 -46
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tools/libxc/xc_private.c +0 -80
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tools/libxc/xc_private.h +0 -24
@@ -123,30 +123,6 @@ struct xc_interface_core {xc_osdep_handle ops_handle;/* opaque data for xc_osdep_ops */ }; -struct xengntdev_handle { -xentoollog_logger *logger, *logger_tofree; -int fd; -}; - -int osdep_gnttab_open (xc_gnttab *xgt); -int osdep_gnttab_close (xc_gnttab *xgt); - -#define XC_GRANT_MAP_SINGLE_DOMAIN 0x1 -void *osdep_gnttab_grant_map (xc_gnttab *xgt, -uint32_t count,int flags,int prot, -uint32_t *domids,uint32_t *refs, -uint32_t notify_offset, -evtchn_port_t notify_port); - -int osdep_gntshr_open (xc_gntshr *xgs); -int osdep_gntshr_close (xc_gntshr *xgs); - -void *osdep_gntshr_share_pages (xc_gntshr *xgs, -uint32_t domid,int count, -uint32_t *refs,int writable, -uint32_t notify_offset, -evtchn_port_t notify_port); -void xc_report_error (xc_interface *xch,int code,const char *fmt, ...) __attribute__((format (printf,3 ,4 ))); void xc_reportv(xc_interface *xch, xentoollog_logger *lg, xentoollog_level,
tools/xenstore/Makefile +3 -1
@@ -78,8 +78,10 @@ init-xenstore-domain.o: CFLAGS += $(CFLAGS_libxenguest) init-xenstore-domain: init-xenstore-domain.o $(LIBXENSTORE) $(CC) $^ $(LDFLAGS) $(LDLIBS_libxenevtchn) $(LDLIBS_libxenctrl) $(LDLIBS_libxenguest) $(LDLIBS_libxenstore) -o $@ $(APPEND_LDFLAGS) +$(XENSTORED_OBJS): CFLAGS += $(CFLAGS_libxengnttab) + xenstored: $(XENSTORED_OBJS) - $(CC) $^ $(LDFLAGS) $(LDLIBS_libxenevtchn) $(LDLIBS_libxenctrl) $(SOCKET_LIBS) -o $@ $(APPEND_LDFLAGS) + $(CC) $^ $(LDFLAGS) $(LDLIBS_libxenevtchn) $(LDLIBS_libxengnttab) $(LDLIBS_libxenctrl) $(SOCKET_LIBS) -o $@ $(APPEND_LDFLAGS) xenstored.a: $(XENSTORED_OBJS) $(AR) cr $@ $^
tools/xenstore/xenstored_core.h +3 -1
@@ -20,12 +20,14 @@#define _XENSTORED_CORE_H#include <xenctrl.h> +#include <xengnttab.h> #include <sys/types.h> #include <dirent.h> #include <stdbool.h> #include <stdint.h> #include <errno.h> +#include "xenstore_lib.h" #include "list.h" #include "tdb.h"
@@ -196,7 +198,7 @@ void finish_daemonize(void);/* Open a pipe for signal handling */ void init_pipe (int reopen_log_pipe[2 ]); -xc_gnttab **xcg_handle; +xengnttab_handle **xgt_handle;#endif /* _XENSTORED_CORE_H */
tools/xenstore/xenstored_domain.c +12 -12
@@ -34,7 +34,7 @@#include <xen/grant_table.h> static xc_interface **xc_handle; -xc_gnttab **xcg_handle; +xengnttab_handle **xgt_handle;static evtchn_port_t virq_port;xenevtchn_handle *xce_handle =NULL ;
@@ -166,9 +166,9 @@ static int readchn(struct connection *conn, void *data, unsigned int len)static void *map_interface (domid_t domid,unsigned long mfn) { -if (*xcg_handle !=NULL ) { +if (*xgt_handle !=NULL ) {/* this is the preferred method */ -return xc_gnttab_map_grant_ref (*xcg_handle, domid, +return xengnttab_map_grant_ref (*xgt_handle, domid,GNTTAB_RESERVED_XENSTORE ,PROT_READ |PROT_WRITE ); }else { return xc_map_foreign_range(*xc_handle, domid,
@@ -178,8 +178,8 @@ static void *map_interface(domid_t domid, unsigned long mfn)static void unmap_interface (void *interface) { -if (*xcg_handle !=NULL ) -xc_gnttab_munmap (*xcg_handle, interface,1 ); +if (*xgt_handle !=NULL ) +xengnttab_unmap (*xgt_handle, interface,1 );else munmap (interface,XC_PAGE_SIZE ); }
@@ -577,9 +577,9 @@ static int close_xc_handle(void *_handle)return 0 ; } -static int close_xcg_handle (void *_handle) +static int close_xgt_handle (void *_handle) { -xc_gnttab_close (*(xc_gnttab **)_handle); +xengnttab_close (*(xengnttab_handle **)_handle);return 0 ; }
@@ -634,15 +634,15 @@ void domain_init(void)talloc_set_destructor (xc_handle, close_xc_handle); - xcg_handle = talloc(talloc_autofree_context(), xc_gnttab*); -if (!xcg_handle) + xgt_handle = talloc(talloc_autofree_context(), xengnttab_handle*); +if (!xgt_handle)barf_perror ("Failed to allocate domain gnttab handle" ); - *xcg_handle =xc_gnttab_open (NULL ,0 ); -if (*xcg_handle ==NULL ) + *xgt_handle =xengnttab_open (NULL ,0 ); +if (*xgt_handle ==NULL )xprintf ("WARNING: Failed to open connection to gnttab\n" );else -talloc_set_destructor (xcg_handle, close_xcg_handle); +talloc_set_destructor (xgt_handle, close_xgt_handle); xce_handle =xenevtchn_open (NULL ,0 );
tools/xenstore/xenstored_minios.c +2 -3
@@ -17,7 +17,6 @@*/ #include <sys/types.h> #include <sys/mman.h> -#include <xenctrl.h> #include "xenstored_core.h" #include <xen/grant_table.h>
@@ -50,12 +49,12 @@ evtchn_port_t xenbus_evtchn(void)void *xenbus_map (void ) { -return xc_gnttab_map_grant_ref (*xcg_handle,xenbus_master_domid (), +return xengnttab_map_grant_ref (*xgt_handle,xenbus_master_domid (),GNTTAB_RESERVED_XENSTORE ,PROT_READ |PROT_WRITE ); }void unmap_xenbus (void *interface) { -xc_gnttab_munmap (*xcg_handle, interface,1 ); +xengnttab_unmap (*xgt_handle, interface,1 ); }
Signature · 1 line
2.1.4
Re: [PATCH XEN v7 07/29] tools: Refactor /dev/xen/gnt{dev, shr} wrappers into libxengnttab.
Quoted 7 lines · Ian Campbell
libxengnttab will provide a stable API and ABI for accessing the grant table devices.
The functions are moved into the xengnt{tab,shr} namespace to make a clean break from libxc and avoid ambiguity regarding which interfaces are stable.
Quoted 8 lines
All in-tree users are updated to use the new names.
Upon request (via #define
XC_WANT_COMPAT_GNTTAB_API) libxenctrl will provide a compat API for the old names. This is used by qemu-xen for the time being. qemu-xen-traditional is updated in lockstep.This leaves a few grant table related functions which go via privcmd (EVTCHNOP) rather than ioctls on the
/dev/xen/gnt*devices in
GNTTABOP presumably?
~Andrew
Quoted 6 lines
libxenctrl. Specifically:
-
xc_gnttab_get_version
-xc_gnttab_map_table_v1
-xc_gnttab_map_table_v2
-xc_gnttab_op
Re: [PATCH XEN v7 07/29] tools: Refactor /dev/xen/gnt{dev, shr} wrappers into libxengnttab.
Quoted 10 lines · Andrew Cooper
Quoted 9 lines · Ian Campbell
libxengnttab will provide a stable API and ABI for accessing the grant table devices.
The functions are moved into the xengnt{tab,shr} namespace to make a clean break from libxc and avoid ambiguity regarding which interfaces are stable.
All in-tree users are updated to use the new names.
Quoted 8 lines
Quoted 6 lines
Upon request (via #define
XC_WANT_COMPAT_GNTTAB_API) libxenctrl will provide a compat API for the old names. This is used by qemu-xen for the time being. qemu-xen-traditional is updated in lockstep.This leaves a few grant table related functions which go via privcmd (EVTCHNOP) rather than ioctls on the
/dev/xen/gnt*devices inGNTTABOP presumably?
Uh, yes, I think I may have copied a bit to eagerly from the libxenevtchn patch description!
Quoted 9 lines
~Andrew
Quoted 6 lines
libxenctrl. Specifically:
-
xc_gnttab_get_version
-xc_gnttab_map_table_v1
-xc_gnttab_map_table_v2
-xc_gnttab_op
PATCH v7 8/29 tools/libxc: Remove osdep indirection for privcmd
In reply to Ian CampbellThe alternative backend (a xen-api/xapi shim) is no longer around and so this stuff is now just baggage which is getting in the way of refactoring libxenctrl.
Nested virt probably suffices for this use case now.
This was the last component of the osdep infrastructure, so all the dynamic loading etc stuff all falls away too.
As part of this I was forced to investigate the twisty xc_map_foreign_* maze, which I have added to the toolstack-library-apis doc in the hopes of doing something sensible.
NetBSD and Solaris now call xc_map_foreign_bulk_compat directly from their xc_map_foreign_bulk, which could have been achieved by using some ifdefs around a renamed function. This will fall out in the wash when these functions move to their own library.
---
v7: Stop CCing Dave's dead citrix address.
--- config/FreeBSD.mk | 2 - config/NetBSD.mk | 3 - config/NetBSDRump.mk | 1 - config/StdGNU.mk | 1 - config/SunOS.mk | 1 - tools/libxc/Makefile | 27 ++---- tools/libxc/include/xenctrl.h | 9 -- tools/libxc/include/xenctrlosdep.h | 133 --------------------------- tools/libxc/xc_foreign_memory.c | 31 +------ tools/libxc/xc_freebsd_osdep.c | 100 ++++++--------------- tools/libxc/xc_hcall_buf.c | 6 +- tools/libxc/xc_linux_osdep.c | 88 ++++++------------ tools/libxc/xc_minios.c | 82 +++++------------ tools/libxc/xc_netbsd.c | 90 +++++++------------ tools/libxc/xc_private.c | 174 ++---------------------------------- tools/libxc/xc_private.h | 19 ++-- tools/libxc/xc_solaris.c | 90 +++++++------------ tools/libxc/xenctrl_osdep_ENOSYS.c | 123 ------------------------- tools/ocaml/libs/xc/xenctrl.ml | 2 - tools/ocaml/libs/xc/xenctrl.mli | 1 - tools/ocaml/libs/xc/xenctrl_stubs.c | 7 -- tools/ocaml/xenstored/domains.ml | 6 +- tools/ocaml/xenstored/xenstored.ml | 5 +- 23 files changed, 178 insertions(+), 823 deletions(-) delete mode 100644 tools/libxc/include/xenctrlosdep.h delete mode 100644 tools/libxc/xenctrl_osdep_ENOSYS.c
config/FreeBSD.mk +0 -2
@@ -1,6 +1,4 @@ include $(XEN_ROOT)/config/StdGNU.mk -DLOPEN_LIBS = - # No wget on FreeBSD base system WGET = ftp
config/NetBSD.mk +0 -3
@@ -1,6 +1,3 @@ include $(XEN_ROOT)/config/StdGNU.mk -# Override settings for this OS -DLOPEN_LIBS = - WGET = ftp
config/NetBSDRump.mk +0 -1
@@ -1,6 +1,5 @@ include $(XEN_ROOT)/config/StdGNU.mk -DLOPEN_LIBS = PTHREAD_LIBS = WGET = ftp
config/StdGNU.mk +0 -1
@@ -31,7 +31,6 @@ DEBUG_DIR ?= /usr/lib/debug SOCKET_LIBS = UTIL_LIBS = -lutil -DLOPEN_LIBS = -ldl SONAME_LDFLAG = -soname SHLIB_LDFLAGS = -shared
config/SunOS.mk +0 -1
@@ -27,7 +27,6 @@ SunOS_LIBDIR_x86_64 = /usr/sfw/lib/amd64 SOCKET_LIBS = -lsocket PTHREAD_LIBS = -lpthread UTIL_LIBS = -DLOPEN_LIBS = -ldl SONAME_LDFLAG = -h SHLIB_LDFLAGS = -R $(SunOS_LIBDIR) -shared
tools/libxc/Makefile +7 -20
@@ -101,8 +101,6 @@ GUEST_SRCS-y += xc_dom_decompress_unsafe_lzo1x.c GUEST_SRCS-y += xc_dom_decompress_unsafe_xz.c endif -OSDEP_SRCS-y += xenctrl_osdep_ENOSYS.c - -include $(XEN_TARGET_ARCH)/Makefile CFLAGS += -Werror -Wmissing-prototypes
@@ -121,11 +119,8 @@ CTRL_PIC_OBJS := $(patsubst %.c,%.opic,$(CTRL_SRCS-y)) GUEST_LIB_OBJS := $(patsubst %.c,%.o,$(GUEST_SRCS-y)) GUEST_PIC_OBJS := $(patsubst %.c,%.opic,$(GUEST_SRCS-y)) -OSDEP_LIB_OBJS := $(patsubst %.c,%.o,$(OSDEP_SRCS-y)) -OSDEP_PIC_OBJS := $(patsubst %.c,%.opic,$(OSDEP_SRCS-y)) - -$(CTRL_LIB_OBJS) $(GUEST_LIB_OBJS) $(OSDEP_LIB_OBJS) \ -$(CTRL_PIC_OBJS) $(GUEST_PIC_OBJS) $(OSDEP_PIC_OBJS) : CFLAGS += -include $(XEN_ROOT)/tools/config.h +$(CTRL_LIB_OBJS) $(GUEST_LIB_OBJS) \ +$(CTRL_PIC_OBJS) $(GUEST_PIC_OBJS): CFLAGS += -include $(XEN_ROOT)/tools/config.h $(CTRL_LIB_OBJS) $(CTRL_PIC_OBJS): CFLAGS += $(CFLAGS_libxengnttab) $(CFLAGS_libxengntshr)
@@ -139,17 +134,13 @@ ifneq ($(nosharedlibs),y) LIB += libxenguest.so libxenguest.so.$(MAJOR) libxenguest.so.$(MAJOR).$(MINOR) endif -ifneq ($(nosharedlibs),y) -LIB += xenctrl_osdep_ENOSYS.so -endif - genpath-target = $(call buildmakevars2header,_paths.h) $(eval $(genpath-target)) xc_private.h: _paths.h -$(CTRL_LIB_OBJS) $(GUEST_LIB_OBJS) $(OSDEP_LIB_OBJS) \ -$(CTRL_PIC_OBJS) $(GUEST_PIC_OBJS) $(OSDEP_PIC_OBJS): xc_private.h +$(CTRL_LIB_OBJS) $(GUEST_LIB_OBJS) \ +$(CTRL_PIC_OBJS) $(GUEST_PIC_OBJS): xc_private.h .PHONY: all all: build
@@ -169,7 +160,7 @@ install: build $(INSTALL_DATA) libxenctrl.a $(DESTDIR)$(libdir) $(SYMLINK_SHLIB) libxenctrl.so.$(MAJOR).$(MINOR) $(DESTDIR)$(libdir)/libxenctrl.so.$(MAJOR) $(SYMLINK_SHLIB) libxenctrl.so.$(MAJOR) $(DESTDIR)$(libdir)/libxenctrl.so - $(INSTALL_DATA) include/xenctrl.h include/xenctrl_compat.h include/xenctrlosdep.h $(DESTDIR)$(includedir) + $(INSTALL_DATA) include/xenctrl.h include/xenctrl_compat.h $(DESTDIR)$(includedir) $(INSTALL_SHLIB) libxenguest.so.$(MAJOR).$(MINOR) $(DESTDIR)$(libdir) $(INSTALL_DATA) libxenguest.a $(DESTDIR)$(libdir) $(SYMLINK_SHLIB) libxenguest.so.$(MAJOR).$(MINOR) $(DESTDIR)$(libdir)/libxenguest.so.$(MAJOR)
@@ -185,8 +176,7 @@ clean: rm -rf *.rpm $(LIB) *~ $(DEPS) \ _paths.h \ $(CTRL_LIB_OBJS) $(CTRL_PIC_OBJS) \ - $(GUEST_LIB_OBJS) $(GUEST_PIC_OBJS) \ - $(OSDEP_LIB_OBJS) $(OSDEP_PIC_OBJS) + $(GUEST_LIB_OBJS) $(GUEST_PIC_OBJS) .PHONY: distclean distclean: clean
@@ -212,7 +202,7 @@ libxenctrl.so.$(MAJOR): libxenctrl.so.$(MAJOR).$(MINOR) $(SYMLINK_SHLIB) $< $@ libxenctrl.so.$(MAJOR).$(MINOR): $(CTRL_PIC_OBJS) - $(CC) $(LDFLAGS) $(PTHREAD_LDFLAGS) -Wl,$(SONAME_LDFLAG) -Wl,libxenctrl.so.$(MAJOR) $(SHLIB_LDFLAGS) -o $@ $^ $(LDLIBS_libxentoollog) $(LDLIBS_libxenevtchn) $(LDLIBS_libxengnttab) $(LDLIBS_libxengntshr) $(DLOPEN_LIBS) $(PTHREAD_LIBS) $(APPEND_LDFLAGS) + $(CC) $(LDFLAGS) $(PTHREAD_LDFLAGS) -Wl,$(SONAME_LDFLAG) -Wl,libxenctrl.so.$(MAJOR) $(SHLIB_LDFLAGS) -o $@ $^ $(LDLIBS_libxentoollog) $(LDLIBS_libxenevtchn) $(LDLIBS_libxengnttab) $(LDLIBS_libxengntshr) $(PTHREAD_LIBS) $(APPEND_LDFLAGS) # libxenguest
@@ -237,8 +227,5 @@ libxenguest.so.$(MAJOR).$(MINOR): COMPRESSION_LIBS = $(call zlib-options,l) libxenguest.so.$(MAJOR).$(MINOR): $(GUEST_PIC_OBJS) libxenctrl.so $(CC) $(LDFLAGS) -Wl,$(SONAME_LDFLAG) -Wl,libxenguest.so.$(MAJOR) $(SHLIB_LDFLAGS) -o $@ $(GUEST_PIC_OBJS) $(COMPRESSION_LIBS) -lz $(LDLIBS_libxenevtchn) $(LDLIBS_libxenctrl) $(PTHREAD_LIBS) $(APPEND_LDFLAGS) -xenctrl_osdep_ENOSYS.so: $(OSDEP_PIC_OBJS) libxenctrl.so - $(CC) $(LDFLAGS) $(SHLIB_LDFLAGS) -o $@ $(OSDEP_PIC_OBJS) $(LDLIBS_libxenctrl) $(APPEND_LDFLAGS) - -include $(DEPS)
tools/libxc/include/xenctrl.h +0 -9
@@ -181,15 +181,6 @@ enum xc_open_flags {*/ int xc_interface_close (xc_interface *xch); -/** -* Query the active OS interface (i.e. that which would be returned by -* xc_interface_open) to find out if it is fake (i.e. backends onto -* something other than an actual Xen hypervisor). -* -* @return 0 is "real", >0 if fake, -1 on error. -*/ -int xc_interface_is_fake (void ); -/* * HYPERCALL SAFE MEMORY BUFFER *
tools/libxc/include/xenctrlosdep.h deleted +0 -133
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tools/libxc/xc_foreign_memory.c +1 -30
@@ -50,37 +50,8 @@ void *xc_map_foreign_pages(xc_interface *xch, uint32_t dom, int prot,return res; } -void *xc_map_foreign_range (xc_interface *xch,uint32_t dom, -int size,int prot,unsigned long mfn) -{ -return xch->ops->u.privcmd.map_foreign_range (xch, xch->ops_handle, - dom, size, prot, mfn); -} - -void *xc_map_foreign_ranges (xc_interface *xch,uint32_t dom, -size_t size,int prot,size_t chunksize, -privcmd_mmap_entry_t entries[],int nentries) -{ -return xch->ops->u.privcmd.map_foreign_ranges (xch, xch->ops_handle, - dom, size, prot, chunksize, entries, nentries); -} - -void *xc_map_foreign_batch (xc_interface *xch,uint32_t dom,int prot, -xen_pfn_t *arr,int num) -{ -return xch->ops->u.privcmd.map_foreign_batch (xch, xch->ops_handle, - dom, prot, arr, num); -} - -void *xc_map_foreign_bulk (xc_interface *xch,uint32_t dom,int prot, -const xen_pfn_t *arr,int *err,unsigned int num) -{ -return xch->ops->u.privcmd.map_foreign_bulk (xch, xch->ops_handle, - dom, prot, arr, err, num); -} -/* stub for all not yet converted OSes */ -void *xc_map_foreign_bulk_compat (xc_interface *xch,xc_osdep_handle h, +void *xc_map_foreign_bulk_compat (xc_interface *xch,uint32_t dom,int prot,const xen_pfn_t *arr,int *err,unsigned int num) {
tools/libxc/xc_freebsd_osdep.c +27 -73
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tools/libxc/xc_hcall_buf.c +3 -3
@@ -122,7 +122,7 @@ void xc__hypercall_buffer_cache_release(xc_interface *xch)while ( xch->hypercall_buffer_cache_nr >0 ) { p = xch->hypercall_buffer_cache[--xch->hypercall_buffer_cache_nr]; - xch->ops->u.privcmd.free_hypercall_buffer (xch, xch->ops_handle, p,1 ); +osdep_free_hypercall_buffer (xch, p,1 ); }hypercall_buffer_cache_unlock (xch);
@@ -133,7 +133,7 @@ void *xc__hypercall_buffer_alloc_pages(xc_interface *xch, xc_hypercall_buffer_tvoid *p =hypercall_buffer_cache_alloc (xch, nr_pages);if ( !p ) - p = xch->ops->u.privcmd.alloc_hypercall_buffer (xch, xch->ops_handle, nr_pages); + p =osdep_alloc_hypercall_buffer (xch, nr_pages);if (!p)return NULL ;
@@ -151,7 +151,7 @@ void xc__hypercall_buffer_free_pages(xc_interface *xch, xc_hypercall_buffer_t *breturn ;if ( !hypercall_buffer_cache_free (xch, b->hbuf, nr_pages) ) - xch->ops->u.privcmd.free_hypercall_buffer (xch, xch->ops_handle, b->hbuf, nr_pages); +osdep_free_hypercall_buffer (xch, b->hbuf, nr_pages); }struct allocation_header {
tools/libxc/xc_linux_osdep.c +28 -60
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tools/libxc/xc_minios.c +24 -58
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tools/libxc/xc_netbsd.c +32 -58
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tools/libxc/xc_private.c +7 -167
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tools/libxc/xc_private.h +13 -6
@@ -30,7 +30,6 @@#include "_paths.h" #include "xenctrl.h" -#include "xenctrlosdep.h" #include <xen/sys/privcmd.h>
@@ -88,7 +87,6 @@ struct iovec {#define MAX_PAGECACHE_USAGE (4*1024)struct xc_interface_core { -enum xc_osdep_type type;int flags;xentoollog_logger *error_handler, *error_handler_tofree;xentoollog_logger *dombuild_logger, *dombuild_logger_tofree;
@@ -117,12 +115,21 @@ struct xc_interface_core {int hypercall_buffer_cache_misses;int hypercall_buffer_cache_toobig; -/* Low lovel OS interface */ -xc_osdep_info_t osdep; -xc_osdep_ops *ops;/* backend operations */ -xc_osdep_handle ops_handle;/* opaque data for xc_osdep_ops */ +/* Privcmd interface */ +int privcmdfd; }; +int osdep_privcmd_open (xc_interface *xch); +int osdep_privcmd_close (xc_interface *xch); + +void *osdep_alloc_hypercall_buffer (xc_interface *xch,int npages); +void osdep_free_hypercall_buffer (xc_interface *xch,void *ptr,int npages); + +/* Stub for not yet converted OSes */ +void *xc_map_foreign_bulk_compat (xc_interface *xch, +uint32_t dom,int prot, +const xen_pfn_t *arr,int *err,unsigned int num); +void xc_report_error (xc_interface *xch,int code,const char *fmt, ...) __attribute__((format (printf,3 ,4 ))); void xc_reportv(xc_interface *xch, xentoollog_logger *lg, xentoollog_level,
tools/libxc/xc_solaris.c +32 -58
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tools/libxc/xenctrl_osdep_ENOSYS.c deleted +0 -123
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tools/ocaml/libs/xc/xenctrl.ml +0 -2
@@ -108,8 +108,6 @@ external sizeof_xen_pfn: unit -> int = "stub_sizeof_xen_pfn" external interface_open: unit -> handle = "stub_xc_interface_open" external interface_close: handle -> unit = "stub_xc_interface_close" -external is_fake: unit -> bool = "stub_xc_interface_is_fake" - let with_intf f = let xc = interface_open () in let r = try f xc with exn -> interface_close xc; raise exn in
tools/ocaml/libs/xc/xenctrl.mli +0 -1
@@ -72,7 +72,6 @@ external sizeof_vcpu_guest_context : unit -> int = "stub_sizeof_vcpu_guest_context" external sizeof_xen_pfn : unit -> int = "stub_sizeof_xen_pfn" external interface_open : unit -> handle = "stub_xc_interface_open" -external is_fake : unit -> bool = "stub_xc_interface_is_fake" external interface_close : handle -> unit = "stub_xc_interface_close" val with_intf : (handle -> 'a) -> 'a val domain_create : handle -> int32 -> domain_create_flag list -> string -> domid
tools/ocaml/libs/xc/xenctrl_stubs.c +0 -7
@@ -126,13 +126,6 @@ CAMLprim value stub_xc_interface_open(void) } -CAMLprim value stub_xc_interface_is_fake(void) -{ -CAMLparam0 (); -int is_fake =xc_interface_is_fake (); -CAMLreturn (Val_int (is_fake)); -} - CAMLprim value stub_xc_interface_close(value xch) {CAMLparam1 (xch);
tools/ocaml/xenstored/domains.ml +2 -4
@@ -65,11 +65,9 @@ let create xc doms domid mfn port = Domain.bind_interdomain dom; dom -let create0 fake doms = +let create0 doms = let port, interface = - if fake then ( - 0, Xenctrl.with_intf (fun xc -> Xenctrl.map_foreign_range xc 0 (Xenmmap.getpagesize()) 0n) - ) else ( + ( let port = Utils.read_file_single_integer Define.xenstored_proc_port and fd = Unix.openfile Define.xenstored_proc_kva [ Unix.O_RDWR ] 0o600 in
tools/ocaml/xenstored/xenstored.ml +2 -3
@@ -176,7 +176,7 @@ let from_channel store cons doms chan = if domid > 0 then Domains.create xc doms domid mfn port else - Domains.create0 false doms + Domains.create0 doms in Connections.add_domain cons ndom; in
@@ -278,8 +278,7 @@ let _ = Store.mkdir store (Perms.Connection.create 0) localpath; if cf.domain_init then ( - let usingxiu = Xenctrl.is_fake () in - Connections.add_domain cons (Domains.create0 usingxiu domains); + Connections.add_domain cons (Domains.create0 domains); Event.bind_dom_exc_virq eventchn ); );
Signature · 1 line
2.1.4
PATCH v7 9/29 tools: Refactor hypercall calling wrappers into libxencall.
In reply to Ian Campbelllibxencall will provide a stable API and ABI for calling hypercalls (although those hypercalls themselves may not have a stable API). As well as the hypercall buffer infrastructure needed in order to safely provide pointer arguments to hypercalls.
libxenctrl encapsulates a instance of this interface, so users of that library are not currently subjected to any actual changes. However all hypercalls made internally by libxc now use the correct interface. It is expected that most users of this library will be other libraries providing a higher level interface, rather than applications directly.
Only the basic functionality to allocate hypercall safe memory is moved, the type safe stuff and bounce buffers remain in libxc.
Note that the functionality to map foreign pages using privcmd is not yet moved, meaning that an xc_interface will now contain two open privcmd file descriptors. Foreign memory mapping is logically separate functionality and will be moved into its own library.
The new library uses a version script to ensure that only expected symbols are exported and to version them such that ABI guarantees can be kept in the future.
---
Must be applied with:
- "qemu-xen-traditional: Add libxencall to rpath-link" and a corresponding QEMU_TAG update folded here.
- "mini-os: Include libxencall with libxc" and a corresponding bump to MINIOS_UPSTREAM_REVISION folded in here.
v3: Moved to tools/libs/call
Ported new wrappers (altp2m)
v5: Allow _close(NULL).
v6: Use size_t for nr_pages throughout.
Rebase over "libxc: prefer using privcmd character device"
v7: Added mk-headers-$(XEN_TARGET_ARCH) build dependency instead of
open coding the recursion.
Remove incorrect/spurious APP_LDLIBS (which anyway was removed by a later patch)
--- .gitignore | 2 + stubdom/Makefile | 17 +++- tools/Makefile | 1 + tools/Rules.mk | 7 +- tools/libs/Makefile | 1 + tools/libs/call/Makefile | 67 +++++++++++++ tools/libs/call/buffer.c | 192 ++++++++++++++++++++++++++++++++++++++ tools/libs/call/core.c | 147 +++++++++++++++++++++++++++++ tools/libs/call/freebsd.c | 140 +++++++++++++++++++++++++++ tools/libs/call/include/xencall.h | 84 +++++++++++++++++ tools/libs/call/libxencall.map | 19 ++++ tools/libs/call/linux.c | 138 +++++++++++++++++++++++++++ tools/libs/call/minios.c | 81 ++++++++++++++++ tools/libs/call/netbsd.c | 121 ++++++++++++++++++++++++ tools/libs/call/private.h | 68 ++++++++++++++ tools/libs/call/solaris.c | 97 +++++++++++++++++++ tools/libxc/Makefile | 7 +- tools/libxc/xc_altp2m.c | 64 ++++--------- tools/libxc/xc_domain.c | 105 +++++++-------------- tools/libxc/xc_evtchn.c | 9 +- tools/libxc/xc_flask.c | 8 +- tools/libxc/xc_freebsd_osdep.c | 47 ---------- tools/libxc/xc_gnttab.c | 9 +- tools/libxc/xc_hcall_buf.c | 138 ++------------------------- tools/libxc/xc_kexec.c | 36 +++---- tools/libxc/xc_linux_osdep.c | 49 ---------- tools/libxc/xc_minios.c | 32 ------- tools/libxc/xc_misc.c | 79 ++++++---------- tools/libxc/xc_netbsd.c | 40 -------- tools/libxc/xc_private.c | 64 +++++-------- tools/libxc/xc_private.h | 76 +++++---------- tools/libxc/xc_solaris.c | 16 ---- tools/libxc/xc_tmem.c | 7 +- tools/misc/Makefile | 4 +- tools/xcutils/Makefile | 2 +- tools/xenpaging/Makefile | 2 +- 36 files changed, 1344 insertions(+), 632 deletions(-) create mode 100644 tools/libs/call/Makefile create mode 100644 tools/libs/call/buffer.c create mode 100644 tools/libs/call/core.c create mode 100644 tools/libs/call/freebsd.c create mode 100644 tools/libs/call/include/xencall.h create mode 100644 tools/libs/call/libxencall.map create mode 100644 tools/libs/call/linux.c create mode 100644 tools/libs/call/minios.c create mode 100644 tools/libs/call/netbsd.c create mode 100644 tools/libs/call/private.h create mode 100644 tools/libs/call/solaris.c
.gitignore +2 -0
@@ -61,6 +61,7 @@ stubdom/xenstore stubdom/libxentoollog-* stubdom/libxenevtchn-* stubdom/libxengnttab-* +stubdom/libxencall-* stubdom/libxc-* stubdom/lwip-* stubdom/mini-os-*
@@ -90,6 +91,7 @@ config/Docs.mk tools/libs/toollog/headers.chk tools/libs/evtchn/headers.chk tools/libs/gnttab/headers.chk +tools/libs/call/headers.chk tools/blktap2/daemon/blktapctrl tools/blktap2/drivers/img2qcow tools/blktap2/drivers/lock-util
stubdom/Makefile +16 -1
@@ -331,6 +331,12 @@ mk-headers-$(XEN_TARGET_ARCH): $(IOEMU_LINKFARM_TARGET) ln -sf $(XEN_ROOT)/tools/libs/gnttab/include/*.h include/ && \ ln -sf $(XEN_ROOT)/tools/libs/gnttab/*.c . && \ ln -sf $(XEN_ROOT)/tools/libs/gnttab/Makefile . ) + mkdir -p libs-$(XEN_TARGET_ARCH)/call/include + [ -h libs-$(XEN_TARGET_ARCH)/call/Makefile ] || ( cd libs-$(XEN_TARGET_ARCH)/call && \ + ln -sf $(XEN_ROOT)/tools/libs/call/*.h . && \ + ln -sf $(XEN_ROOT)/tools/libs/call/include/*.h include/ && \ + ln -sf $(XEN_ROOT)/tools/libs/call/*.c . && \ + ln -sf $(XEN_ROOT)/tools/libs/call/Makefile . ) mkdir -p libxc-$(XEN_TARGET_ARCH) [ -h libxc-$(XEN_TARGET_ARCH)/Makefile ] || ( cd libxc-$(XEN_TARGET_ARCH) && \ ln -sf $(XEN_ROOT)/tools/libxc/*.h . && \
@@ -381,12 +387,21 @@ libs-$(XEN_TARGET_ARCH)/gnttab/libxengnttab.a: mk-headers-$(XEN_TARGET_ARCH) $(N CPPFLAGS="$(TARGET_CPPFLAGS)" CFLAGS="$(TARGET_CFLAGS)" $(MAKE) DESTDIR= -C libs-$(XEN_TARGET_ARCH)/gnttab ####### +# libxencall +####### + +.PHONY: libxencall +libxencall: libs-$(XEN_TARGET_ARCH)/call/libxencall.a +libs-$(XEN_TARGET_ARCH)/call/libxencall.a: mk-headers-$(XEN_TARGET_ARCH) $(NEWLIB_STAMPFILE) + CPPFLAGS="$(TARGET_CPPFLAGS)" CFLAGS="$(TARGET_CFLAGS)" $(MAKE) DESTDIR= -C libs-$(XEN_TARGET_ARCH)/call + +####### # libxc ####### .PHONY: libxc libxc: libxc-$(XEN_TARGET_ARCH)/libxenctrl.a libxc-$(XEN_TARGET_ARCH)/libxenguest.a -libxc-$(XEN_TARGET_ARCH)/libxenctrl.a: mk-headers-$(XEN_TARGET_ARCH) libxentoollog libxenevtchn libxengnttab cross-zlib +libxc-$(XEN_TARGET_ARCH)/libxenctrl.a: mk-headers-$(XEN_TARGET_ARCH) libxentoollog libxenevtchn libxengnttab libxencall cross-zlib CPPFLAGS="$(TARGET_CPPFLAGS)" CFLAGS="$(TARGET_CFLAGS)" $(MAKE) DESTDIR= CONFIG_LIBXC_MINIOS=y -C libxc-$(XEN_TARGET_ARCH) libxc-$(XEN_TARGET_ARCH)/libxenguest.a: libxc-$(XEN_TARGET_ARCH)/libxenctrl.a
tools/Makefile +1 -0
@@ -263,6 +263,7 @@ subdir-all-qemu-xen-dir: qemu-xen-dir-find -Wl,-rpath-link=$(XEN_ROOT)/tools/libs/toollog \ -Wl,-rpath-link=$(XEN_ROOT)/tools/libs/evtchn \ -Wl,-rpath-link=$(XEN_ROOT)/tools/libs/gnttab \ + -Wl,-rpath-link=$(XEN_ROOT)/tools/libs/call \ $(QEMU_UPSTREAM_RPATH)" \ --bindir=$(LIBEXEC_BIN) \ --datadir=$(SHAREDIR)/qemu-xen \
tools/Rules.mk +6 -1
@@ -13,6 +13,7 @@ XEN_INCLUDE = $(XEN_ROOT)/tools/include XEN_LIBXENTOOLLOG = $(XEN_ROOT)/tools/libs/toollog XEN_LIBXENEVTCHN = $(XEN_ROOT)/tools/libs/evtchn XEN_LIBXENGNTTAB = $(XEN_ROOT)/tools/libs/gnttab +XEN_LIBXENCALL = $(XEN_ROOT)/tools/libs/call XEN_LIBXC = $(XEN_ROOT)/tools/libxc XEN_XENLIGHT = $(XEN_ROOT)/tools/libxl XEN_XENSTORE = $(XEN_ROOT)/tools/xenstore
@@ -98,8 +99,12 @@ CFLAGS_libxengntshr = -I$(XEN_LIBXENGNTTAB)/include $(CFLAGS_xeninclude) LDLIBS_libxengntshr = $(XEN_LIBXENGNTTAB)/libxengnttab$(libextension) SHLIB_libxengntshr = -Wl,-rpath-link=$(XEN_LIBXENGNTTAB) +CFLAGS_libxencall = -I$(XEN_LIBXENCALL)/include $(CFLAGS_xeninclude) +LDLIBS_libxencall = $(XEN_LIBXENCALL)/libxencall$(libextension) +SHLIB_libxencall = -Wl,-rpath-link=$(XEN_LIBXENCALL) + CFLAGS_libxenctrl = -I$(XEN_LIBXC)/include $(CFLAGS_libxentoollog) $(CFLAGS_xeninclude) -SHDEPS_libxenctrl = $(SHLIB_libxentoollog) $(SHLIB_libxenevtchn) $(SHLIB_libxengnttab) $(SHLIB_libxengntshr) +SHDEPS_libxenctrl = $(SHLIB_libxentoollog) $(SHLIB_libxenevtchn) $(SHLIB_libxengnttab) $(SHLIB_libxengntshr) $(SHLIB_libxencall) LDLIBS_libxenctrl = $(SHDEPS_libxenctrl) $(XEN_LIBXC)/libxenctrl$(libextension) SHLIB_libxenctrl = $(SHDEPS_libxenctrl) -Wl,-rpath-link=$(XEN_LIBXC)
tools/libs/Makefile +1 -0
@@ -5,5 +5,6 @@ SUBDIRS-y := SUBDIRS-y += toollog SUBDIRS-y += evtchn SUBDIRS-y += gnttab +SUBDIRS-y += call all clean install distclean: %: subdirs-%
tools/libs/call/Makefile new file +67 -0
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tools/libs/call/buffer.c new file +192 -0
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tools/libs/call/core.c new file +147 -0
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tools/libs/call/freebsd.c new file +140 -0
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tools/libs/call/include/xencall.h new file +84 -0
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tools/libs/call/libxencall.map new file +19 -0
@@ -0,0 +1,19 @@ +VERS_1.0 { + global: + xencall_open; + xencall_close; + + xencall0; + xencall1; + xencall2; + xencall3; + xencall4; + xencall5; + xencall6; + + xencall_alloc_buffer; + xencall_free_buffer; + xencall_alloc_buffer_pages; + xencall_free_buffer_pages; + local: *; /* Do not expose anything by default */ +};
tools/libs/call/linux.c new file +138 -0
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tools/libs/call/minios.c new file +81 -0
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tools/libs/call/netbsd.c new file +121 -0
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tools/libs/call/private.h new file +68 -0
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tools/libs/call/solaris.c new file +97 -0
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tools/libxc/Makefile +6 -1
@@ -122,6 +122,11 @@ GUEST_PIC_OBJS := $(patsubst %.c,%.opic,$(GUEST_SRCS-y)) $(CTRL_LIB_OBJS) $(GUEST_LIB_OBJS) \ $(CTRL_PIC_OBJS) $(GUEST_PIC_OBJS): CFLAGS += -include $(XEN_ROOT)/tools/config.h +# libxenguest includes xc_private.h, so needs this despite not using +# this functionality directly. +$(CTRL_LIB_OBJS) $(GUEST_LIB_OBJS) \ +$(CTRL_PIC_OBJS) $(GUEST_PIC_OBJS): CFLAGS += $(CFLAGS_libxencall) + $(CTRL_LIB_OBJS) $(CTRL_PIC_OBJS): CFLAGS += $(CFLAGS_libxengnttab) $(CFLAGS_libxengntshr) LIB := libxenctrl.a
@@ -202,7 +207,7 @@ libxenctrl.so.$(MAJOR): libxenctrl.so.$(MAJOR).$(MINOR) $(SYMLINK_SHLIB) $< $@ libxenctrl.so.$(MAJOR).$(MINOR): $(CTRL_PIC_OBJS) - $(CC) $(LDFLAGS) $(PTHREAD_LDFLAGS) -Wl,$(SONAME_LDFLAG) -Wl,libxenctrl.so.$(MAJOR) $(SHLIB_LDFLAGS) -o $@ $^ $(LDLIBS_libxentoollog) $(LDLIBS_libxenevtchn) $(LDLIBS_libxengnttab) $(LDLIBS_libxengntshr) $(PTHREAD_LIBS) $(APPEND_LDFLAGS) + $(CC) $(LDFLAGS) $(PTHREAD_LDFLAGS) -Wl,$(SONAME_LDFLAG) -Wl,libxenctrl.so.$(MAJOR) $(SHLIB_LDFLAGS) -o $@ $^ $(LDLIBS_libxentoollog) $(LDLIBS_libxenevtchn) $(LDLIBS_libxengnttab) $(LDLIBS_libxengntshr) $(LDLIBS_libxencall) $(PTHREAD_LIBS) $(APPEND_LDFLAGS) # libxenguest
tools/libxc/xc_altp2m.c +16 -48
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tools/libxc/xc_domain.c +36 -69
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tools/libxc/xc_evtchn.c +3 -6
@@ -25,7 +25,6 @@ static int do_evtchn_op(xc_interface *xch, int cmd, void *arg, size_t arg_size, int silently_fail) {int ret =-1 ; -DECLARE_HYPERCALL ;DECLARE_HYPERCALL_BOUNCE (arg, arg_size,XC_HYPERCALL_BUFFER_BOUNCE_BOTH );if (xc_hypercall_bounce_pre (xch, arg) )
@@ -34,11 +33,9 @@ static int do_evtchn_op(xc_interface *xch, int cmd, void *arg, goto out; } - hypercall.op = __HYPERVISOR_event_channel_op; - hypercall.arg[0 ] = cmd; - hypercall.arg[1 ] =HYPERCALL_BUFFER_AS_ARG (arg); - -if ((ret =do_xen_hypercall (xch, &hypercall)) <0 && !silently_fail) + ret =xencall2 (xch->xcall, __HYPERVISOR_event_channel_op, + cmd,HYPERCALL_BUFFER_AS_ARG (arg)); +if ( ret <0 && !silently_fail )ERROR ("do_evtchn_op: HYPERVISOR_event_channel_op failed: %d" , ret);xc_hypercall_bounce_post (xch, arg);
tools/libxc/xc_flask.c +3 -5
@@ -37,7 +37,6 @@int xc_flask_op (xc_interface *xch,xen_flask_op_t *op) {int ret =-1 ; -DECLARE_HYPERCALL ;DECLARE_HYPERCALL_BOUNCE (op,sizeof (*op),XC_HYPERCALL_BUFFER_BOUNCE_BOTH ); op->interface_version =XEN_FLASK_INTERFACE_VERSION ;
@@ -48,10 +47,9 @@ int xc_flask_op(xc_interface *xch, xen_flask_op_t *op) goto out; } - hypercall.op = __HYPERVISOR_xsm_op; - hypercall.arg[0 ] =HYPERCALL_BUFFER_AS_ARG (op); - -if ( (ret =do_xen_hypercall (xch, &hypercall)) <0 ) + ret =xencall1 (xch->xcall, __HYPERVISOR_xsm_op, +HYPERCALL_BUFFER_AS_ARG (op)); +if ( ret <0 ) {if ( errno ==EACCES )fprintf (stderr,"XSM operation failed!\n" );
tools/libxc/xc_freebsd_osdep.c +0 -47
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tools/libxc/xc_gnttab.c +2 -7
@@ -21,7 +21,6 @@int xc_gnttab_op (xc_interface *xch,int cmd,void * op,int op_size,int count) {int ret =0 ; -DECLARE_HYPERCALL ;DECLARE_HYPERCALL_BOUNCE (op, count * op_size,XC_HYPERCALL_BUFFER_BOUNCE_BOTH );if (xc_hypercall_bounce_pre (xch, op) )
@@ -30,12 +29,8 @@ int xc_gnttab_op(xc_interface *xch, int cmd, void * op, int op_size, int count) goto out1; } - hypercall.op = __HYPERVISOR_grant_table_op; - hypercall.arg[0 ] = cmd; - hypercall.arg[1 ] =HYPERCALL_BUFFER_AS_ARG (op); - hypercall.arg[2 ] = count; - - ret =do_xen_hypercall (xch, &hypercall); + ret =xencall3 (xch->xcall, __HYPERVISOR_grant_table_op, + cmd,HYPERCALL_BUFFER_AS_ARG (op), count);xc_hypercall_bounce_post (xch, op);
tools/libxc/xc_hcall_buf.c +6 -132
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tools/libxc/xc_kexec.c +12 -24
@@ -14,7 +14,6 @@int xc_kexec_exec (xc_interface *xch,int type) { -DECLARE_HYPERCALL ;DECLARE_HYPERCALL_BUFFER (xen_kexec_exec_t, exec);int ret =-1 ;
@@ -27,11 +26,9 @@ int xc_kexec_exec(xc_interface *xch, int type) exec->type = type; - hypercall.op = __HYPERVISOR_kexec_op; - hypercall.arg[0 ] = KEXEC_CMD_kexec; - hypercall.arg[1 ] =HYPERCALL_BUFFER_AS_ARG (exec); - - ret =do_xen_hypercall (xch, &hypercall); + ret =xencall2 (xch->xcall, __HYPERVISOR_kexec_op, + KEXEC_CMD_kexec, +HYPERCALL_BUFFER_AS_ARG (exec)); out:xc_hypercall_buffer_free (xch, exec);
@@ -42,7 +39,6 @@ out:int xc_kexec_get_range (xc_interface *xch,int range,int nr,uint64_t *size,uint64_t *start) { -DECLARE_HYPERCALL ;DECLARE_HYPERCALL_BUFFER (xen_kexec_range_t, get_range);int ret =-1 ;
@@ -56,11 +52,9 @@ int xc_kexec_get_range(xc_interface *xch, int range, int nr, get_range->range = range; get_range->nr = nr; - hypercall.op = __HYPERVISOR_kexec_op; - hypercall.arg[0 ] = KEXEC_CMD_kexec_get_range; - hypercall.arg[1 ] =HYPERCALL_BUFFER_AS_ARG (get_range); - - ret =do_xen_hypercall (xch, &hypercall); + ret =xencall2 (xch->xcall, __HYPERVISOR_kexec_op, + KEXEC_CMD_kexec_get_range, +HYPERCALL_BUFFER_AS_ARG (get_range)); *size = get_range->size; *start = get_range->start;
@@ -76,7 +70,6 @@ int xc_kexec_load(xc_interface *xch, uint8_t type, uint16_t arch, uint32_t nr_segments, xen_kexec_segment_t *segments) { int ret = -1; -DECLARE_HYPERCALL ;DECLARE_HYPERCALL_BOUNCE (segments,sizeof (*segments) * nr_segments,XC_HYPERCALL_BUFFER_BOUNCE_IN );DECLARE_HYPERCALL_BUFFER (xen_kexec_load_t, load);
@@ -99,11 +92,9 @@ int xc_kexec_load(xc_interface *xch, uint8_t type, uint16_t arch, load->nr_segments = nr_segments;set_xen_guest_handle (load->segments.h, segments); - hypercall.op = __HYPERVISOR_kexec_op; - hypercall.arg[0 ] = KEXEC_CMD_kexec_load; - hypercall.arg[1 ] =HYPERCALL_BUFFER_AS_ARG (load); - - ret =do_xen_hypercall (xch, &hypercall); + ret =xencall2 (xch->xcall, __HYPERVISOR_kexec_op, + KEXEC_CMD_kexec_load, +HYPERCALL_BUFFER_AS_ARG (load)); out:xc_hypercall_buffer_free (xch, load);
@@ -114,7 +105,6 @@ out:int xc_kexec_unload (xc_interface *xch,int type) { -DECLARE_HYPERCALL ;DECLARE_HYPERCALL_BUFFER (xen_kexec_unload_t, unload);int ret =-1 ;
@@ -127,11 +117,9 @@ int xc_kexec_unload(xc_interface *xch, int type) unload->type = type; - hypercall.op = __HYPERVISOR_kexec_op; - hypercall.arg[0 ] = KEXEC_CMD_kexec_unload; - hypercall.arg[1 ] =HYPERCALL_BUFFER_AS_ARG (unload); - - ret =do_xen_hypercall (xch, &hypercall); + ret =xencall2 (xch->xcall, __HYPERVISOR_kexec_op, + KEXEC_CMD_kexec_unload, +HYPERCALL_BUFFER_AS_ARG (unload)); out:xc_hypercall_buffer_free (xch, unload);
tools/libxc/xc_linux_osdep.c +0 -49
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tools/libxc/xc_minios.c +0 -32
@@ -61,38 +61,6 @@ void minios_interface_close_fd(int fd) files[fd].type =FTYPE_NONE ; } -void *osdep_alloc_hypercall_buffer (xc_interface *xch,int npages) -{ -return xc_memalign (xch,PAGE_SIZE , npages *PAGE_SIZE ); -} - -void osdep_free_hypercall_buffer (xc_interface *xch,void *ptr,int npages) -{ -free (ptr); -} - -int do_xen_hypercall (xc_interface *xch,privcmd_hypercall_t *hypercall) -{ -multicall_entry_t call; -int i, ret; - - call.op = hypercall->op; -for (i =0 ; i <ARRAY_SIZE (hypercall->arg); i++) - call.args[i] = hypercall->arg[i]; - - ret =HYPERVISOR_multicall (&call,1 ); - -if (ret <0 ) { - errno = -ret; -return -1 ; - } -if ((long ) call.result <0 ) { - errno = - (long ) call.result; -return -1 ; - } -return call.result; -} -void *xc_map_foreign_bulk (xc_interface *xch,uint32_t dom,int prot,const xen_pfn_t *arr,int *err,unsigned int num)
tools/libxc/xc_misc.c +27 -52
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tools/libxc/xc_netbsd.c +0 -40
@@ -67,46 +67,6 @@ int osdep_privcmd_close(xc_interface *xch)return close (fd); } -void *osdep_alloc_hypercall_buffer (xc_interface *xch,int npages) -{ -size_t size = npages *XC_PAGE_SIZE ; -void *p; - - p =xc_memalign (xch,XC_PAGE_SIZE , size); -if (!p) -return NULL ; - -if (mlock (p, size) <0 ) - { -free (p); -return NULL ; - } -return p; -} - -void osdep_free_hypercall_buffer (xc_interface *xch,void *ptr,int npages) -{ - (void )munlock (ptr, npages *XC_PAGE_SIZE ); -free (ptr); -} - -int do_xen_hypercall (xc_interface *xch,privcmd_hypercall_t *hypercall) -{ -int fd = xch->privcmdfd; -int error =ioctl (fd,IOCTL_PRIVCMD_HYPERCALL , hypercall); - -/* -* Since NetBSD ioctl can only return 0 on success or < 0 on -* error, if we want to return a value from ioctl we should -* do so by setting hypercall->retval, to mimic Linux ioctl -* implementation. -*/ -if (error <0 ) -return error; -else -return hypercall->retval; -} -void *xc_map_foreign_bulk (xc_interface *xch,uint32_t dom,int prot,const xen_pfn_t *arr,int *err,unsigned int num)
tools/libxc/xc_private.c +25 -39
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tools/libxc/xc_private.h +21 -55
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tools/libxc/xc_solaris.c +0 -16
@@ -67,22 +67,6 @@ int osdep_privcmd_close(xc_interface *xch)return close (fd); } -void *osdep_alloc_hypercall_buffer (xc_interface *xch,int npages) -{ -return xc_memalign (xch,XC_PAGE_SIZE , npages *XC_PAGE_SIZE ); -} - -static void osdep_free_hypercall_buffer (xc_interface *xch,void *ptr,int npages) -{ -free (ptr); -} - -int do_xen_hypercall (xc_interface *xch,privcmd_hypercall_t *hypercall) -{ -int fd = xch->privcmdfd; -return ioctl (fd,IOCTL_PRIVCMD_HYPERCALL , hypercall); -} -void *xc_map_foreign_batch (xc_interface *xch,uint32_t dom,int prot,xen_pfn_t *arr,int num)
tools/libxc/xc_tmem.c +3 -4
@@ -23,7 +23,6 @@static int do_tmem_op (xc_interface *xch,tmem_op_t *op) {int ret; -DECLARE_HYPERCALL ;DECLARE_HYPERCALL_BOUNCE (op,sizeof (*op),XC_HYPERCALL_BUFFER_BOUNCE_BOTH );if (xc_hypercall_bounce_pre (xch, op) )
@@ -32,9 +31,9 @@ static int do_tmem_op(xc_interface *xch, tmem_op_t *op)return -EFAULT ; } - hypercall.op = __HYPERVISOR_tmem_op; - hypercall.arg[0 ] =HYPERCALL_BUFFER_AS_ARG (op); -if ((ret =do_xen_hypercall (xch, &hypercall)) <0 ) + ret =xencall1 (xch->xcall, __HYPERVISOR_tmem_op, +HYPERCALL_BUFFER_AS_ARG (op)); +if ( ret <0 ) {if ( errno ==EACCES ) DPRINTF("tmem operation failed -- need to"
tools/misc/Makefile +2 -2
@@ -87,12 +87,12 @@ xenlockprof: xenlockprof.o $(CC) $(LDFLAGS) -o $@ $< $(LDLIBS_libxenctrl) $(APPEND_LDFLAGS) # xen-hptool incorrectly uses libxc internals -xen-hptool.o: CFLAGS += -I$(XEN_ROOT)/tools/libxc +xen-hptool.o: CFLAGS += -I$(XEN_ROOT)/tools/libxc $(CFLAGS_libxencall) xen-hptool: xen-hptool.o $(CC) $(LDFLAGS) -o $@ $< $(LDLIBS_libxenevtchn) $(LDLIBS_libxenctrl) $(LDLIBS_libxenguest) $(LDLIBS_libxenstore) $(APPEND_LDFLAGS) # xen-mfndump incorrectly uses libxc internals -xen-mfndump.o: CFLAGS += -I$(XEN_ROOT)/tools/libxc +xen-mfndump.o: CFLAGS += -I$(XEN_ROOT)/tools/libxc $(CFLAGS_libxencall) xen-mfndump: xen-mfndump.o $(CC) $(LDFLAGS) -o $@ $< $(LDLIBS_libxenevtchn) $(LDLIBS_libxenctrl) $(LDLIBS_libxenguest) $(APPEND_LDFLAGS)
tools/xcutils/Makefile +1 -1
@@ -16,7 +16,7 @@ PROGRAMS = readnotes lsevtchn CFLAGS += -Werror # incorrectly uses libxc internals -CFLAGS_readnotes.o := $(CFLAGS_libxenevtchn) $(CFLAGS_libxenctrl) $(CFLAGS_libxenguest) -I$(XEN_ROOT)/tools/libxc +CFLAGS_readnotes.o := $(CFLAGS_libxenevtchn) $(CFLAGS_libxenctrl) $(CFLAGS_libxenguest) -I$(XEN_ROOT)/tools/libxc $(CFLAGS_libxencall) CFLAGS_lsevtchn.o := $(CFLAGS_libxenevtchn) $(CFLAGS_libxenctrl) .PHONY: all
tools/xenpaging/Makefile +1 -1
@@ -2,7 +2,7 @@ XEN_ROOT=$(CURDIR)/../.. include $(XEN_ROOT)/tools/Rules.mk # xenpaging.c and file_ops.c incorrectly use libxc internals -CFLAGS += $(CFLAGS_libxentoollog) $(CFLAGS_libxenevtchn) $(CFLAGS_libxenctrl) $(CFLAGS_libxenstore) $(PTHREAD_CFLAGS) -I$(XEN_ROOT)/tools/libxc +CFLAGS += $(CFLAGS_libxentoollog) $(CFLAGS_libxenevtchn) $(CFLAGS_libxenctrl) $(CFLAGS_libxenstore) $(PTHREAD_CFLAGS) -I$(XEN_ROOT)/tools/libxc $(CFLAGS_libxencall) LDLIBS += $(LDLIBS_libxentoollog) $(LDLIBS_libxenevtchn) $(LDLIBS_libxenctrl) $(LDLIBS_libxenstore) $(PTHREAD_LIBS) LDFLAGS += $(PTHREAD_LDFLAGS)
Signature · 1 line
2.1.4
PATCH v7 10/29 tools/libxc: drop xc_map_foreign_bulk_compat wrappers
In reply to Ian CampbellOn Solaris and NetBSD xc_map_foreign_bulk is implemented by calling xc_map_foreign_bulk_compat and xc_map_foreign_bulk_compat is exposed as a symbol by libxenctrl.so.
Remove these wrappers and turn the compat function into the real thing surrounded by the appropriate ifdef.
As this is a compat function all new ports should instead implement xc_map_foreign_bulk properly, hence the ifdef should never be expanded.
--- tools/libxc/xc_foreign_memory.c | 13 +++++++++---- tools/libxc/xc_netbsd.c | 7 ------- tools/libxc/xc_private.h | 5 ----- tools/libxc/xc_solaris.c | 7 ------- 4 files changed, 9 insertions(+), 23 deletions(-)
tools/libxc/xc_foreign_memory.c +9 -4
@@ -50,10 +50,14 @@ void *xc_map_foreign_pages(xc_interface *xch, uint32_t dom, int prot,return res; } -/* stub for all not yet converted OSes */ -void *xc_map_foreign_bulk_compat (xc_interface *xch, -uint32_t dom,int prot, -const xen_pfn_t *arr,int *err,unsigned int num) +/* +* stub for all not yet converted OSes (NetBSD and Solaris). New OSes should +* just implement xc_map_foreign_bulk. +*/ +#if defined(__NetBSD__) || defined(__sun__) +void *xc_map_foreign_bulk (xc_interface *xch, +uint32_t dom,int prot, +const xen_pfn_t *arr,int *err,unsigned int num) {xen_pfn_t *pfn;unsigned int i;
@@ -90,6 +94,7 @@ void *xc_map_foreign_bulk_compat(xc_interface *xch, return ret; } +#endif /* * Local variables:
tools/libxc/xc_netbsd.c +0 -7
@@ -67,13 +67,6 @@ int osdep_privcmd_close(xc_interface *xch)return close (fd); } -void *xc_map_foreign_bulk (xc_interface *xch, -uint32_t dom,int prot, -const xen_pfn_t *arr,int *err,unsigned int num) -{ -return xc_map_foreign_bulk_compat (xch, dom, prot, arr, err, num); -} -void *xc_map_foreign_batch (xc_interface *xch,uint32_t dom,int prot,xen_pfn_t *arr,int num)
tools/libxc/xc_private.h +0 -5
@@ -107,11 +107,6 @@ int osdep_privcmd_close(xc_interface *xch);void *osdep_alloc_hypercall_buffer (xc_interface *xch,int npages);void osdep_free_hypercall_buffer (xc_interface *xch,void *ptr,int npages); -/* Stub for not yet converted OSes */ -void *xc_map_foreign_bulk_compat (xc_interface *xch, -uint32_t dom,int prot, -const xen_pfn_t *arr,int *err,unsigned int num); -void xc_report_error (xc_interface *xch,int code,const char *fmt, ...) __attribute__((format (printf,3 ,4 ))); void xc_reportv(xc_interface *xch, xentoollog_logger *lg, xentoollog_level,
tools/libxc/xc_solaris.c +0 -7
@@ -94,13 +94,6 @@ void *xc_map_foreign_batch(xc_interface *xch, } -void *xc_map_foreign_bulk (xc_interface *xch, -uint32_t dom,int prot, -const xen_pfn_t *arr,int *err,unsigned int num) -{ -return xc_map_foreign_bulk_compat (xch, dom, prot, arr, err, num); -} - void *xc_map_foreign_range(xc_interface *xch, uint32_t dom, int size, int prot,
Signature · 1 line
2.1.4
PATCH v7 11/29 tools: Remove xc_map_foreign_batch
In reply to Ian CampbellIt can trivially be replaced by xc_map_foreign_pages which is the interface I want to move to going forward (by standardising on _bulk but handling err=NULL as _pages does).
The callers of _batch are checking a mixture of a NULL return or looking to see if the top nibble of the (usually sole) mfn they pass has been modified to be non-zero to detect errors. _pages never modifies the mfn it was given (it's const) and returns NULL on failure, so adjust the error handling where necessary. Some callers use a copy of the mfn array, for reuse on failure with _batch, which is no longer necessary as _pages doesn't modify the array, however I haven't cleaned that up here.
This reduces the twist maze of xc_map_foreign_* by one, which will be useful when trying to come up with an underlying stable interface.
NetBSD and Solaris implemented xc_map_foreign_bulk in terms of xc_map_foreign_batch via a compat layer, so xc_map_foreign_batch becomes an internal osdep for them.
---
v7: Don't mention new ports implementing _bulk, which is confusing and
will be obsolete a couple of patches later.
v6: Switch to xc_map_foreign_pages not xc_map_foreign_bulk, since the
former has more similar error handling semantics to the current usage.
Dropped acks.
--- tools/libxc/include/xenctrl.h | 10 ------- tools/libxc/xc_foreign_memory.c | 4 ++- tools/libxc/xc_linux_osdep.c | 59 +++-------------------------------------- tools/libxc/xc_minios.c | 22 --------------- tools/libxc/xc_netbsd.c | 10 +++---- tools/libxc/xc_solaris.c | 6 ++--- tools/libxc/xc_vm_event.c | 18 ++++++++++--- tools/xenmon/xenbaked.c | 12 ++++++++- tools/xenpaging/xenpaging.c | 14 +++++----- tools/xentrace/xentrace.c | 3 ++- 10 files changed, 48 insertions(+), 110 deletions(-)
tools/libxc/include/xenctrl.h +0 -10
@@ -1387,16 +1387,6 @@ void *xc_map_foreign_pages(xc_interface *xch, uint32_t dom, int prot, const xen_pfn_t *arr, int num );/** -* DEPRECATED - use xc_map_foreign_bulk() instead. -* -* Like xc_map_foreign_pages(), except it can succeeed partially. -* When a page cannot be mapped, its PFN in @arr is or'ed with -* 0xF0000000 to indicate the error. -*/ -void *xc_map_foreign_batch (xc_interface *xch,uint32_t dom,int prot, -xen_pfn_t *arr,int num ); - -/** * Like xc_map_foreign_pages(), except it can succeed partially. * When a page cannot be mapped, its respective field in @err is * set to the corresponding errno value.
tools/libxc/xc_foreign_memory.c +3 -1
@@ -55,6 +55,8 @@ void *xc_map_foreign_pages(xc_interface *xch, uint32_t dom, int prot,* just implement xc_map_foreign_bulk. */ #if defined(__NetBSD__) || defined(__sun__) +void *osdep_map_foreign_batch (xc_interface *xch,uint32_t dom,int prot, +xen_pfn_t *arr,int num );void *xc_map_foreign_bulk (xc_interface *xch,uint32_t dom,int prot,const xen_pfn_t *arr,int *err,unsigned int num)
@@ -75,7 +77,7 @@ void *xc_map_foreign_bulk(xc_interface *xch, }memcpy (pfn, arr, num *sizeof (*arr)); - ret =xc_map_foreign_batch (xch, dom, prot, pfn, num); + ret =osdep_map_foreign_batch (xch, dom, prot, pfn, num);if (ret) {for (i =0 ; i < num; ++i)
tools/libxc/xc_linux_osdep.c +3 -56
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tools/libxc/xc_minios.c +0 -22
@@ -73,28 +73,6 @@ void *xc_map_foreign_bulk(xc_interface *xch,return map_frames_ex (arr, num,1 ,0 ,1 , dom, err, pt_prot); } -void *xc_map_foreign_batch (xc_interface *xch, -uint32_t dom,int prot, -xen_pfn_t *arr,int num) -{ -unsigned long pt_prot =0 ; -int err[num]; -int i; -unsigned long addr; - -if (prot &PROT_READ ) - pt_prot =L1_PROT_RO ; -if (prot &PROT_WRITE ) - pt_prot =L1_PROT ; - - addr = (unsigned long )map_frames_ex (arr, num,1 ,0 ,1 , dom, err, pt_prot); -for (i =0 ; i < num; i++) { -if (err[i]) - arr[i] |=0xF0000000 ; - } -return (void *) addr; -} - void *xc_map_foreign_range(xc_interface *xch, uint32_t dom, int size, int prot,
tools/libxc/xc_netbsd.c +5 -5
@@ -67,16 +67,16 @@ int osdep_privcmd_close(xc_interface *xch)return close (fd); } -void *xc_map_foreign_batch (xc_interface *xch, -uint32_t dom,int prot, -xen_pfn_t *arr,int num) +void *osdep_map_foreign_batch (xc_interface *xch, +uint32_t dom,int prot, +xen_pfn_t *arr,int num) {int fd = xch->privcmdfd;privcmd_mmapbatch_t ioctlx;void *addr; addr =mmap (NULL , num*XC_PAGE_SIZE , prot,MAP_ANON |MAP_SHARED ,-1 ,0 );if ( addr ==MAP_FAILED ) { -PERROR ("xc_map_foreign_batch: mmap failed" ); +PERROR ("osdep_map_foreign_batch: mmap failed" );return NULL ; }
@@ -87,7 +87,7 @@ void *xc_map_foreign_batch(xc_interface *xch,if (ioctl (fd,IOCTL_PRIVCMD_MMAPBATCH , &ioctlx) <0 ) {int saved_errno = errno; -PERROR ("xc_map_foreign_batch: ioctl failed" ); +PERROR ("osdep_map_foreign_batch: ioctl failed" ); (void )munmap (addr, num*XC_PAGE_SIZE ); errno = saved_errno;return NULL ;
tools/libxc/xc_solaris.c +3 -3
@@ -67,9 +67,9 @@ int osdep_privcmd_close(xc_interface *xch)return close (fd); } -void *xc_map_foreign_batch (xc_interface *xch, -uint32_t dom,int prot, -xen_pfn_t *arr,int num) +void *osdep_map_foreign_batch (xc_interface *xch, +uint32_t dom,int prot, +xen_pfn_t *arr,int num) {int fd = xch->privcmdfd;privcmd_mmapbatch_t ioctlx;
tools/libxc/xc_vm_event.c +14 -4
@@ -72,9 +72,9 @@ void *xc_vm_event_enable(xc_interface *xch, domid_t domain_id, int param, ring_pfn = pfn; mmap_pfn = pfn; - ring_page =xc_map_foreign_batch (xch, domain_id,PROT_READ |PROT_WRITE , + ring_page =xc_map_foreign_pages (xch, domain_id,PROT_READ |PROT_WRITE , &mmap_pfn,1 ); -if ( mmap_pfn &XEN_DOMCTL_PFINFO_XTAB ) +if ( !ring_page ) {/* Map failed, populate ring page */ rc1 = xc_domain_populate_physmap_exact(xch, domain_id, 1, 0, 0,
@@ -86,9 +86,9 @@ void *xc_vm_event_enable(xc_interface *xch, domid_t domain_id, int param, } mmap_pfn = ring_pfn; - ring_page =xc_map_foreign_batch (xch, domain_id,PROT_READ |PROT_WRITE , + ring_page =xc_map_foreign_pages (xch, domain_id,PROT_READ |PROT_WRITE , &mmap_pfn,1 ); -if ( mmap_pfn &XEN_DOMCTL_PFINFO_XTAB ) +if ( !ring_page ) {PERROR ("Could not map the ring page\n" ); goto out;
@@ -156,3 +156,13 @@ void *xc_vm_event_enable(xc_interface *xch, domid_t domain_id, int param,return ring_page; } + +/* +* Local variables: +* mode: C +* c-file-style: "BSD" +* c-basic-offset: 4 +* tab-width: 4 +* indent-tabs-mode: nil +* End: +*/
tools/xenmon/xenbaked.c +11 -1
@@ -411,7 +411,7 @@ static struct t_struct *map_tbufs(unsigned long tbufs_mfn, unsigned int num,for ( j=0 ; j<tbufs.t_info->tbuf_size; j++) pfn_list[j] = (xen_pfn_t )mfn_list[j]; - tbufs.meta[i] =xc_map_foreign_batch (xc_handle,DOMID_XEN , + tbufs.meta[i] =xc_map_foreign_pages (xc_handle,DOMID_XEN ,PROT_READ |PROT_WRITE , pfn_list, tbufs.t_info->tbuf_size);
@@ -1175,3 +1175,13 @@ static int process_record(int cpu, struct t_rec *r)return 4 + (r->cycles_included ?8 :0 ) + (r->extra_u32 *4 ); } + +/* +* Local variables: +* mode: C +* c-file-style: "BSD" +* c-basic-offset: 4 +* tab-width: 4 +* indent-tabs-mode: nil +* End: +*/
tools/xenpaging/xenpaging.c +7 -7
@@ -342,9 +342,9 @@ static struct xenpaging *xenpaging_init(int argc, char *argv[]) HVM_PARAM_PAGING_RING_PFN, &ring_pfn); mmap_pfn = ring_pfn; paging->vm_event.ring_page = -xc_map_foreign_batch (xch, paging->vm_event.domain_id, -PROT_READ |PROT_WRITE , &mmap_pfn,1 ); -if ( mmap_pfn &XEN_DOMCTL_PFINFO_XTAB ) +xc_map_foreign_pages (xch, paging->vm_event.domain_id, +PROT_READ |PROT_WRITE , &mmap_pfn,1 ); +if ( !paging->vm_event.ring_page ) {/* Map failed, populate ring page */ rc = xc_domain_populate_physmap_exact(paging->xc_handle,
@@ -356,11 +356,11 @@ static struct xenpaging *xenpaging_init(int argc, char *argv[]) goto err; } - mmap_pfn = ring_pfn; paging->vm_event.ring_page = -xc_map_foreign_batch (xch, paging->vm_event.domain_id, -PROT_READ |PROT_WRITE , &mmap_pfn,1 ); -if ( mmap_pfn &XEN_DOMCTL_PFINFO_XTAB ) +xc_map_foreign_pages (xch, paging->vm_event.domain_id, +PROT_READ |PROT_WRITE , + &mmap_pfn,1 ); +if ( !paging->vm_event.ring_page ) {PERROR ("Could not map the ring page\n" ); goto err;
tools/xentrace/xentrace.c +2 -1
@@ -508,7 +508,7 @@ static struct t_struct *map_tbufs(unsigned long tbufs_mfn, unsigned int num,for ( j=0 ; j<tbufs.t_info->tbuf_size; j++) pfn_list[j] = (xen_pfn_t )mfn_list[j]; - tbufs.meta[i] =xc_map_foreign_batch (xc_handle,DOMID_XEN , + tbufs.meta[i] =xc_map_foreign_pages (xc_handle,DOMID_XEN ,PROT_READ |PROT_WRITE , pfn_list, tbufs.t_info->tbuf_size);
@@ -1221,6 +1221,7 @@ int main(int argc, char **argv)return ret; } +/* * Local variables: * mode: C
Signature · 1 line
2.1.4
PATCH v7 12/29 tools: Implement xc_map_foreign_range(s) in terms of common helper
In reply to Ian CampbellBoth Linux and FreeBSD already implemented these functions using identical helpers based on xc_map_foreign_pages. Make one copy of these common helpers and switch all OSes to use them, even those which previously had a specific lower level implementation of this functionality.
This is makes two fewer low level interfaces to think about.
--- tools/libxc/xc_foreign_memory.c | 50 +++++++++++++++++++++++++++++ tools/libxc/xc_freebsd_osdep.c | 50 ----------------------------- tools/libxc/xc_linux_osdep.c | 49 ----------------------------- tools/libxc/xc_minios.c | 43 ------------------------- tools/libxc/xc_netbsd.c | 70 ----------------------------------------- tools/libxc/xc_solaris.c | 67 --------------------------------------- 6 files changed, 50 insertions(+), 279 deletions(-)
tools/libxc/xc_foreign_memory.c +50 -0
@@ -50,6 +50,56 @@ void *xc_map_foreign_pages(xc_interface *xch, uint32_t dom, int prot,return res; } +void *xc_map_foreign_range (xc_interface *xch, +uint32_t dom,int size,int prot, +unsigned long mfn) +{ +xen_pfn_t *arr; +int num; +int i; +void *ret; + + num = (size +XC_PAGE_SIZE -1 ) >>XC_PAGE_SHIFT ; + arr =calloc (num,sizeof (xen_pfn_t)); +if ( arr ==NULL ) +return NULL ; + +for ( i =0 ; i < num; i++ ) + arr[i] = mfn + i; + + ret =xc_map_foreign_pages (xch, dom, prot, arr, num); +free (arr); +return ret; +} + +void *xc_map_foreign_ranges (xc_interface *xch, +uint32_t dom,size_t size, +int prot,size_t chunksize, +privcmd_mmap_entry_t entries[], +int nentries) +{ +xen_pfn_t *arr; +int num_per_entry; +int num; +int i; +int j; +void *ret; + + num_per_entry = chunksize >>XC_PAGE_SHIFT ; + num = num_per_entry * nentries; + arr =calloc (num,sizeof (xen_pfn_t)); +if ( arr ==NULL ) +return NULL ; + +for ( i =0 ; i < nentries; i++ ) +for ( j =0 ; j < num_per_entry; j++ ) + arr[i * num_per_entry + j] = entries[i].mfn + j; + + ret =xc_map_foreign_pages (xch, dom, prot, arr, num); +free (arr); +return ret; +} +/* * stub for all not yet converted OSes (NetBSD and Solaris). New OSes should * just implement xc_map_foreign_bulk.
tools/libxc/xc_freebsd_osdep.c +0 -50
56 lines not on this page · raw message
tools/libxc/xc_linux_osdep.c +0 -49
55 lines not on this page · raw message
tools/libxc/xc_minios.c +0 -43
49 lines not on this page · raw message
tools/libxc/xc_netbsd.c +0 -70
76 lines not on this page · raw message
tools/libxc/xc_solaris.c +0 -67
73 lines not on this page · raw message
Signature · 1 line
2.1.4
PATCH v7 13/29 tools: Refactor foreign memory mapping into libxenforeignmemory
In reply to Ian Campbelllibxenforeignmemory will provide a stable API and ABI for mapping foreign domain memory (subject to appropriate privileges).
The new library exposes an interface equivalent to xc_map_foreign_memory_bulk, which all the other xc_map_foreign_memory_* functions (which remain in libxc) are implemented in terms of.
Upon request (via #define XC_WANT_COMPAT_MAP_FOREIGN_API) libxenctrl will provide a compat API for the old names. This is used by qemu-xen and qemu-trad as well as various in tree things (which required de-dupping various #includes in some too to get the #define before the first).
---
Must be applied with:
- "qemu-xen-traditional: qemu-xen-traditional: Add libxenforeignmemory to rpath-link" and a corresponding QEMU_TAG update folded here.
- "mini-os: mini-os: Include libxenforeignmemory with libxc" and a corresponding bump to MINIOS_UPSTREAM_REVISION folded in here.
v5: Allow close(NULL)
v6: Define XC_WANT_COMPAT_MAP_FOREIGN_API for xen-mceinj.c and memshrtool.c
Fix typo in type name in compat.c, and get the functions names to match.
Use an osdep layer for _map, to allow for future common code.
v7: Correct comment in compat.h #error due to switch to osdep layer
for map in v6
Added mk-headers-$(XEN_TARGET_ARCH) build dependency instead of open coding the recursion.
---
.gitignore | 2 +
stubdom/Makefile | 17 +++-
tools/Makefile | 2 +
tools/Rules.mk | 11 ++-
tools/console/daemon/utils.c | 1 -
tools/console/daemon/utils.h | 1 +
tools/libs/Makefile | 1 +
tools/libs/foreignmemory/Makefile | 67 +++++++++++++
tools/libs/foreignmemory/compat.c | 72 ++++++++++++++
tools/libs/foreignmemory/core.c | 84 +++++++++++++++++
.../foreignmemory/freebsd.c} | 33 +++----
.../libs/foreignmemory/include/xenforeignmemory.h | 71 ++++++++++++++
tools/libs/foreignmemory/libxenforeignmemory.map | 7 ++
.../foreignmemory/linux.c} | 70 ++++++--------
tools/libs/foreignmemory/minios.c | 62 ++++++++++++
tools/libs/foreignmemory/netbsd.c | 105 +++++++++++++++++++++
tools/libs/foreignmemory/private.h | 53 +++++++++++
tools/libs/foreignmemory/solaris.c | 93 ++++++++++++++++++
tools/libxc/Makefile | 8 +-
tools/libxc/include/xenctrl.h | 26 -----
tools/libxc/include/xenctrl_compat.h | 36 +++++++
tools/libxc/xc_foreign_memory.c | 49 +---------
tools/libxc/xc_minios.c | 29 ------
tools/libxc/xc_netbsd.c | 73 --------------
tools/libxc/xc_private.c | 13 +--
tools/libxc/xc_private.h | 11 ++-
tools/libxc/xc_solaris.c | 73 --------------
tools/libxc/xc_sr_restore.c | 4 +-
tools/libxc/xc_sr_save.c | 4 +-
tools/libxc/xg_private.h | 3 +-
tools/libxl/libxl_internal.h | 1 +
tools/misc/xen-mfndump.c | 1 +
tools/ocaml/libs/xc/xenctrl_stubs.c | 1 +
tools/python/xen/lowlevel/xc/xc.c | 2 +
tools/tests/mce-test/tools/xen-mceinj.c | 1 +
tools/tests/mem-sharing/memshrtool.c | 1 +
tools/xenmon/xenbaked.c | 1 +
tools/xenpaging/pagein.c | 1 -
tools/xenpaging/xenpaging.c | 1 -
tools/xenpaging/xenpaging.h | 2 +
tools/xenstore/xenstored_core.c | 1 -
tools/xenstore/xenstored_core.h | 1 +
tools/xentrace/xenctx.c | 3 +-
tools/xentrace/xentrace.c | 1 +
44 files changed, 766 insertions(+), 333 deletions(-)
create mode 100644 tools/libs/foreignmemory/Makefile
create mode 100644 tools/libs/foreignmemory/compat.c
create mode 100644 tools/libs/foreignmemory/core.c
rename tools/{libxc/xc_freebsd_osdep.c => libs/foreignmemory/freebsd.c} (76%)
create mode 100644 tools/libs/foreignmemory/include/xenforeignmemory.h
create mode 100644 tools/libs/foreignmemory/libxenforeignmemory.map
rename tools/{libxc/xc_linux_osdep.c => libs/foreignmemory/linux.c} (83%)
create mode 100644 tools/libs/foreignmemory/minios.c
create mode 100644 tools/libs/foreignmemory/netbsd.c
create mode 100644 tools/libs/foreignmemory/private.h
create mode 100644 tools/libs/foreignmemory/solaris.c.gitignore +2 -0
@@ -62,6 +62,7 @@ stubdom/libxentoollog-* stubdom/libxenevtchn-* stubdom/libxengnttab-* stubdom/libxencall-* +stubdom/libxenforeignmemory-* stubdom/libxc-* stubdom/lwip-* stubdom/mini-os-*
@@ -92,6 +93,7 @@ tools/libs/toollog/headers.chk tools/libs/evtchn/headers.chk tools/libs/gnttab/headers.chk tools/libs/call/headers.chk +tools/libs/foreignmemory/headers.chk tools/blktap2/daemon/blktapctrl tools/blktap2/drivers/img2qcow tools/blktap2/drivers/lock-util
stubdom/Makefile +16 -1
@@ -337,6 +337,12 @@ mk-headers-$(XEN_TARGET_ARCH): $(IOEMU_LINKFARM_TARGET) ln -sf $(XEN_ROOT)/tools/libs/call/include/*.h include/ && \ ln -sf $(XEN_ROOT)/tools/libs/call/*.c . && \ ln -sf $(XEN_ROOT)/tools/libs/call/Makefile . ) + mkdir -p libs-$(XEN_TARGET_ARCH)/foreignmemory/include + [ -h libs-$(XEN_TARGET_ARCH)/foreignmemory/Makefile ] || ( cd libs-$(XEN_TARGET_ARCH)/foreignmemory && \ + ln -sf $(XEN_ROOT)/tools/libs/foreignmemory/*.h . && \ + ln -sf $(XEN_ROOT)/tools/libs/foreignmemory/include/*.h include/ && \ + ln -sf $(XEN_ROOT)/tools/libs/foreignmemory/*.c . && \ + ln -sf $(XEN_ROOT)/tools/libs/foreignmemory/Makefile . ) mkdir -p libxc-$(XEN_TARGET_ARCH) [ -h libxc-$(XEN_TARGET_ARCH)/Makefile ] || ( cd libxc-$(XEN_TARGET_ARCH) && \ ln -sf $(XEN_ROOT)/tools/libxc/*.h . && \
@@ -396,12 +402,21 @@ libs-$(XEN_TARGET_ARCH)/call/libxencall.a: mk-headers-$(XEN_TARGET_ARCH) $(NEWLI CPPFLAGS="$(TARGET_CPPFLAGS)" CFLAGS="$(TARGET_CFLAGS)" $(MAKE) DESTDIR= -C libs-$(XEN_TARGET_ARCH)/call ####### +# libxenforeignmemory +####### + +.PHONY: libxenforeignmemory +libxenforeignmemory: libs-$(XEN_TARGET_ARCH)/foreignmemory/libxenforeignmemory.a +libs-$(XEN_TARGET_ARCH)/foreignmemory/libxenforeignmemory.a: mk-headers-$(XEN_TARGET_ARCH) $(NEWLIB_STAMPFILE) + CPPFLAGS="$(TARGET_CPPFLAGS)" CFLAGS="$(TARGET_CFLAGS)" $(MAKE) DESTDIR= -C libs-$(XEN_TARGET_ARCH)/foreignmemory + +####### # libxc ####### .PHONY: libxc libxc: libxc-$(XEN_TARGET_ARCH)/libxenctrl.a libxc-$(XEN_TARGET_ARCH)/libxenguest.a -libxc-$(XEN_TARGET_ARCH)/libxenctrl.a: mk-headers-$(XEN_TARGET_ARCH) libxentoollog libxenevtchn libxengnttab libxencall cross-zlib +libxc-$(XEN_TARGET_ARCH)/libxenctrl.a: mk-headers-$(XEN_TARGET_ARCH) libxentoollog libxenevtchn libxengnttab libxencall libxenforeignmemory cross-zlib CPPFLAGS="$(TARGET_CPPFLAGS)" CFLAGS="$(TARGET_CFLAGS)" $(MAKE) DESTDIR= CONFIG_LIBXC_MINIOS=y -C libxc-$(XEN_TARGET_ARCH) libxc-$(XEN_TARGET_ARCH)/libxenguest.a: libxc-$(XEN_TARGET_ARCH)/libxenctrl.a
tools/Makefile +2 -0
@@ -250,6 +250,7 @@ subdir-all-qemu-xen-dir: qemu-xen-dir-find --source-path=$$source \ --extra-cflags="-DXC_WANT_COMPAT_EVTCHN_API=1 \ -DXC_WANT_COMPAT_GNTTAB_API=1 \ + -DXC_WANT_COMPAT_MAP_FOREIGN_API=1 \ -I$(XEN_ROOT)/tools/include \ -I$(XEN_ROOT)/tools/libs/toollog/include \ -I$(XEN_ROOT)/tools/libs/evtchn/include \
@@ -264,6 +265,7 @@ subdir-all-qemu-xen-dir: qemu-xen-dir-find -Wl,-rpath-link=$(XEN_ROOT)/tools/libs/evtchn \ -Wl,-rpath-link=$(XEN_ROOT)/tools/libs/gnttab \ -Wl,-rpath-link=$(XEN_ROOT)/tools/libs/call \ + -Wl,-rpath-link=$(XEN_ROOT)/tools/libs/foreignmemory \ $(QEMU_UPSTREAM_RPATH)" \ --bindir=$(LIBEXEC_BIN) \ --datadir=$(SHAREDIR)/qemu-xen \
tools/Rules.mk +8 -3
@@ -14,6 +14,7 @@ XEN_LIBXENTOOLLOG = $(XEN_ROOT)/tools/libs/toollog XEN_LIBXENEVTCHN = $(XEN_ROOT)/tools/libs/evtchn XEN_LIBXENGNTTAB = $(XEN_ROOT)/tools/libs/gnttab XEN_LIBXENCALL = $(XEN_ROOT)/tools/libs/call +XEN_LIBXENFOREIGNMEMORY = $(XEN_ROOT)/tools/libs/foreignmemory XEN_LIBXC = $(XEN_ROOT)/tools/libxc XEN_XENLIGHT = $(XEN_ROOT)/tools/libxl XEN_XENSTORE = $(XEN_ROOT)/tools/xenstore
@@ -103,12 +104,16 @@ CFLAGS_libxencall = -I$(XEN_LIBXENCALL)/include $(CFLAGS_xeninclude) LDLIBS_libxencall = $(XEN_LIBXENCALL)/libxencall$(libextension) SHLIB_libxencall = -Wl,-rpath-link=$(XEN_LIBXENCALL) -CFLAGS_libxenctrl = -I$(XEN_LIBXC)/include $(CFLAGS_libxentoollog) $(CFLAGS_xeninclude) -SHDEPS_libxenctrl = $(SHLIB_libxentoollog) $(SHLIB_libxenevtchn) $(SHLIB_libxengnttab) $(SHLIB_libxengntshr) $(SHLIB_libxencall) +CFLAGS_libxenforeignmemory = -I$(XEN_LIBXENFOREIGNMEMORY)/include $(CFLAGS_xeninclude) +LDLIBS_libxenforeignmemory = $(XEN_LIBXENFOREIGNMEMORY)/libxenforeignmemory$(libextension) +SHLIB_libxenforeignmemory = -Wl,-rpath-link=$(XEN_LIBXENFOREIGNMEMORY) + +CFLAGS_libxenctrl = -I$(XEN_LIBXC)/include $(CFLAGS_libxentoollog) $(CFLAGS_libxenforeignmemory) $(CFLAGS_xeninclude) +SHDEPS_libxenctrl = $(SHLIB_libxentoollog) $(SHLIB_libxenevtchn) $(SHLIB_libxengnttab) $(SHLIB_libxengntshr) $(SHLIB_libxencall) $(SHLIB_libxenforeignmemory) LDLIBS_libxenctrl = $(SHDEPS_libxenctrl) $(XEN_LIBXC)/libxenctrl$(libextension) SHLIB_libxenctrl = $(SHDEPS_libxenctrl) -Wl,-rpath-link=$(XEN_LIBXC) -CFLAGS_libxenguest = -I$(XEN_LIBXC)/include $(CFLAGS_libxenevtchn) $(CFLAGS_xeninclude) +CFLAGS_libxenguest = -I$(XEN_LIBXC)/include $(CFLAGS_libxenevtchn) $(CFLAGS_libxenforeignmemory) $(CFLAGS_xeninclude) SHDEPS_libxenguest = $(SHLIB_libxenevtchn) LDLIBS_libxenguest = $(SHDEPS_libxenguest) $(XEN_LIBXC)/libxenguest$(libextension) SHLIB_libxenguest = $(SHDEPS_libxenguest) -Wl,-rpath-link=$(XEN_LIBXC)
tools/console/daemon/utils.c +0 -1
@@ -33,7 +33,6 @@#include <string.h> #include <signal.h> -#include "xenctrl.h" #include "utils.h" struct xs_handle *xs;
tools/console/daemon/utils.h +1 -0
@@ -23,6 +23,7 @@#include <stdbool.h> #include <syslog.h> #include <stdio.h> +#define XC_WANT_COMPAT_MAP_FOREIGN_API #include <xenctrl.h> #include <xenstore.h>
tools/libs/Makefile +1 -0
@@ -6,5 +6,6 @@ SUBDIRS-y += toollog SUBDIRS-y += evtchn SUBDIRS-y += gnttab SUBDIRS-y += call +SUBDIRS-y += foreignmemory all clean install distclean: %: subdirs-%
tools/libs/foreignmemory/Makefile new file +67 -0
67 lines not on this page · raw message
tools/libs/foreignmemory/compat.c new file +72 -0
72 lines not on this page · raw message
tools/libs/foreignmemory/core.c new file +84 -0
84 lines not on this page · raw message
tools/libs/foreignmemory/freebsd.c renamed from tools/libxc/xc_freebsd_osdep.c +13 -20
@@ -3,9 +3,6 @@* Copyright 2006 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. * -* xc_gnttab functions: -* Copyright (c) 2007-2008, D G Murray <[email protected]> -* * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation;
@@ -30,14 +27,11 @@#include <sys/mman.h> #include <sys/ioctl.h> -#include <xen/memory.h> - -#include "xc_private.h" +#include "private.h" #define PRIVCMD_DEV "/dev/xen/privcmd" -/*------------------------- Privcmd device interface -------------------------*/ -int osdep_privcmd_open (xc_interface *xch) +int osdep_xenforeignmemory_open (xenforeignmemory_handle *fmem) {int flags, saved_errno;int fd =open (PRIVCMD_DEV ,O_RDWR );
@@ -46,7 +40,7 @@ int osdep_privcmd_open(xc_interface *xch) {PERROR ("Could not obtain handle on privileged command interface " PRIVCMD_DEV ); - return -1 +return -1 ; }/*
@@ -69,7 +63,7 @@ int osdep_privcmd_open(xc_interface *xch) goto error; } - xch->privcmdfd = fd; + fmem->fd = fd;return 0 ; error:
@@ -80,26 +74,25 @@ int osdep_privcmd_open(xc_interface *xch)return -1 ; } -int osdep_privcmd_close (xc_interface *xch) +int osdep_xenforeignmemory_close (xenforeignmemory_handle *fmem) { -int fd = xch->privcmdfd; +int fd = fmem->fd;if ( fd ==-1 )return 0 ;return close (fd); } -/*----------------------- Privcmd foreign map interface ----------------------*/ -void *xc_map_foreign_bulk (xc_interface *xch, -uint32_t dom,int prot, -const xen_pfn_t *arr,int *err, -unsigned int num) +void *osdep_xenforeignmemory_map (xenforeignmemory_handle *fmem, +uint32_t dom,int prot, +const xen_pfn_t *arr,int *err, +unsigned int num) { -int fd = xch->privcmdfd; +int fd = fmem->fd;privcmd_mmapbatch_t ioctlx;void *addr;int rc; - addr =mmap (NULL , num <<XC_PAGE_SHIFT , prot,MAP_SHARED , fd,0 ); + addr =mmap (NULL , num <<PAGE_SHIFT , prot,MAP_SHARED , fd,0 );if ( addr ==MAP_FAILED ) {PERROR ("xc_map_foreign_bulk: mmap failed" );
@@ -117,7 +110,7 @@ void *xc_map_foreign_bulk(xc_interface *xch, {int saved_errno = errno;PERROR ("xc_map_foreign_bulk: ioctl failed" ); - (void )munmap (addr, num <<XC_PAGE_SHIFT ); + (void )munmap (addr, num <<PAGE_SHIFT ); errno = saved_errno;return NULL ; }
tools/libs/foreignmemory/include/xenforeignmemory.h new file +71 -0
71 lines not on this page · raw message
tools/libs/foreignmemory/libxenforeignmemory.map new file +7 -0
@@ -0,0 +1,7 @@ +VERS_1.0 { + global: + xenforeignmemory_open; + xenforeignmemory_close; + xenforeignmemory_map; + local: *; /* Do not expose anything by default */ +};
tools/libs/foreignmemory/linux.c renamed from tools/libxc/xc_linux_osdep.c +31 -39
175 lines not on this page · raw message
tools/libs/foreignmemory/minios.c new file +62 -0
62 lines not on this page · raw message
tools/libs/foreignmemory/netbsd.c new file +105 -0
105 lines not on this page · raw message
tools/libs/foreignmemory/private.h new file +53 -0
53 lines not on this page · raw message
tools/libs/foreignmemory/solaris.c new file +93 -0
93 lines not on this page · raw message
tools/libxc/Makefile +4 -4
@@ -42,8 +42,8 @@ CTRL_SRCS-y += xc_kexec.c CTRL_SRCS-y += xc_resource.c CTRL_SRCS-$(CONFIG_X86) += xc_psr.c CTRL_SRCS-$(CONFIG_X86) += xc_pagetab.c -CTRL_SRCS-$(CONFIG_Linux) += xc_linux.c xc_linux_osdep.c -CTRL_SRCS-$(CONFIG_FreeBSD) += xc_freebsd.c xc_freebsd_osdep.c +CTRL_SRCS-$(CONFIG_Linux) += xc_linux.c +CTRL_SRCS-$(CONFIG_FreeBSD) += xc_freebsd.c CTRL_SRCS-$(CONFIG_SunOS) += xc_solaris.c CTRL_SRCS-$(CONFIG_NetBSD) += xc_netbsd.c CTRL_SRCS-$(CONFIG_NetBSDRump) += xc_netbsd.c
@@ -125,7 +125,7 @@ $(CTRL_PIC_OBJS) $(GUEST_PIC_OBJS): CFLAGS += -include $(XEN_ROOT)/tools/config. # libxenguest includes xc_private.h, so needs this despite not using # this functionality directly. $(CTRL_LIB_OBJS) $(GUEST_LIB_OBJS) \ -$(CTRL_PIC_OBJS) $(GUEST_PIC_OBJS): CFLAGS += $(CFLAGS_libxencall) +$(CTRL_PIC_OBJS) $(GUEST_PIC_OBJS): CFLAGS += $(CFLAGS_libxencall) $(CFLAGS_libxenforeignmemory) $(CTRL_LIB_OBJS) $(CTRL_PIC_OBJS): CFLAGS += $(CFLAGS_libxengnttab) $(CFLAGS_libxengntshr)
@@ -207,7 +207,7 @@ libxenctrl.so.$(MAJOR): libxenctrl.so.$(MAJOR).$(MINOR) $(SYMLINK_SHLIB) $< $@ libxenctrl.so.$(MAJOR).$(MINOR): $(CTRL_PIC_OBJS) - $(CC) $(LDFLAGS) $(PTHREAD_LDFLAGS) -Wl,$(SONAME_LDFLAG) -Wl,libxenctrl.so.$(MAJOR) $(SHLIB_LDFLAGS) -o $@ $^ $(LDLIBS_libxentoollog) $(LDLIBS_libxenevtchn) $(LDLIBS_libxengnttab) $(LDLIBS_libxengntshr) $(LDLIBS_libxencall) $(PTHREAD_LIBS) $(APPEND_LDFLAGS) + $(CC) $(LDFLAGS) $(PTHREAD_LDFLAGS) -Wl,$(SONAME_LDFLAG) -Wl,libxenctrl.so.$(MAJOR) $(SHLIB_LDFLAGS) -o $@ $^ $(LDLIBS_libxentoollog) $(LDLIBS_libxenevtchn) $(LDLIBS_libxengnttab) $(LDLIBS_libxengntshr) $(LDLIBS_libxencall) $(LDLIBS_libxenforeignmemory) $(PTHREAD_LIBS) $(APPEND_LDFLAGS) # libxenguest
tools/libxc/include/xenctrl.h +0 -26
@@ -1369,32 +1369,6 @@ int xc_lockprof_query(xc_interface *xch,void *xc_memalign (xc_interface *xch,size_t alignment,size_t size);/** -* Memory maps a range within one domain to a local address range. Mappings -* should be unmapped with munmap and should follow the same rules as mmap -* regarding page alignment. Returns NULL on failure. -* -* @parm xch a handle on an open hypervisor interface -* @parm dom the domain to map memory from -* @parm size the amount of memory to map (in multiples of page size) -* @parm prot same flag as in mmap(). -* @parm mfn the frame address to map. -*/ -void *xc_map_foreign_range (xc_interface *xch,uint32_t dom, -int size,int prot, -unsigned long mfn ); - -void *xc_map_foreign_pages (xc_interface *xch,uint32_t dom,int prot, -const xen_pfn_t *arr,int num ); - -/** -* Like xc_map_foreign_pages(), except it can succeed partially. -* When a page cannot be mapped, its respective field in @err is -* set to the corresponding errno value. -*/ -void *xc_map_foreign_bulk (xc_interface *xch,uint32_t dom,int prot, -const xen_pfn_t *arr,int *err,unsigned int num); - -/** * Translates a virtual address in the context of a given domain and * vcpu returning the GFN containing the address (that is, an MFN for * PV guests, a PFN for HVM guests). Returns 0 for failure.
tools/libxc/include/xenctrl_compat.h +36 -0
@@ -12,6 +12,42 @@#ifndef XENCTRL_COMPAT_H #define XENCTRL_COMPAT_H +#ifdef XC_WANT_COMPAT_MAP_FOREIGN_API +/** +* Memory maps a range within one domain to a local address range. Mappings +* should be unmapped with munmap and should follow the same rules as mmap +* regarding page alignment. Returns NULL on failure. +* +* @parm xch a handle on an open hypervisor interface +* @parm dom the domain to map memory from +* @parm size the amount of memory to map (in multiples of page size) +* @parm prot same flag as in mmap(). +* @parm mfn the frame address to map. +*/ +void *xc_map_foreign_range (xc_interface *xch,uint32_t dom, +int size,int prot, +unsigned long mfn ); + +void *xc_map_foreign_pages (xc_interface *xch,uint32_t dom,int prot, +const xen_pfn_t *arr,int num ); + +/* Nothing within the library itself other than the compat wrapper +* itself should be using this, everything inside has access to +* xenforeignmemory_map(). +*/ +#if !defined(XC_INTERNAL_COMPAT_MAP_FOREIGN_API ) || \ + defined(XC_BUILDING_COMPAT_MAP_FOREIGN_API ) +/** +* Like xc_map_foreign_pages(), except it can succeed partially. +* When a page cannot be mapped, its respective field in @err is +* set to the corresponding errno value. +*/ +void *xc_map_foreign_bulk (xc_interface *xch,uint32_t dom,int prot, +const xen_pfn_t *arr,int *err,unsigned int num); +#endif + +#endif +#ifdef XC_WANT_COMPAT_EVTCHN_API typedef struct xenevtchn_handle xc_evtchn ;
tools/libxc/xc_foreign_memory.c +4 -45
70 lines not on this page · raw message
tools/libxc/xc_minios.c +0 -29
@@ -39,40 +39,11 @@ void minios_interface_close_fd(int fd);extern void minios_interface_close_fd (int fd); -int osdep_privcmd_open (xc_interface *xch) -{ -int fd =alloc_fd (FTYPE_XC ); - -if ( fd ==-1 ) -return -1 ; - - xch->privcmdfd = fd; -return 0 ; -} - -int osdep_privcmd_close (xc_interface *xch) -{ -int fd = xch->privcmdfd; -return close (fd); -} -void minios_interface_close_fd (int fd) { files[fd].type =FTYPE_NONE ; } -void *xc_map_foreign_bulk (xc_interface *xch, -uint32_t dom,int prot, -const xen_pfn_t *arr,int *err,unsigned int num) -{ -unsigned long pt_prot =0 ; -if (prot &PROT_READ ) - pt_prot =L1_PROT_RO ; -if (prot &PROT_WRITE ) - pt_prot =L1_PROT ; -return map_frames_ex (arr, num,1 ,0 ,1 , dom, err, pt_prot); -} -/* Optionally flush file to disk and discard page cache */ void discard_file_cache (xc_interface *xch,int fd,int flush) {
tools/libxc/xc_netbsd.c +0 -73
79 lines not on this page · raw message
tools/libxc/xc_private.c +7 -6
@@ -58,11 +58,12 @@ struct xc_interface_core *xc_interface_open(xentoollog_logger *logger,if (open_flags &XC_OPENFLAG_DUMMY )return xch;/* We are done */ -if (osdep_privcmd_open (xch) <0 ) - goto err; - xch->xcall =xencall_open (xch->error_handler, open_flags &XC_OPENFLAG_NON_REENTRANT ?XENCALL_OPENFLAG_NON_REENTRANT :0U ); +if ( xch->xcall ==NULL ) + goto err; + + xch->fmem =xenforeignmemory_open (xch->error_handler,0 );if ( xch->xcall ==NULL ) goto err;
@@ -70,7 +71,7 @@ struct xc_interface_core *xc_interface_open(xentoollog_logger *logger,return xch; err: -osdep_privcmd_close (xch); +xencall_close (xch->xcall);xtl_logger_destroy (xch->error_handler_tofree);if (xch != &xch_buf)free (xch);return NULL ;
@@ -86,8 +87,8 @@ int xc_interface_close(xc_interface *xch) rc =xencall_close (xch->xcall);if (rc)PERROR ("Could not close xencall interface" ); - rc =osdep_privcmd_close (xch); -if (rc)PERROR ("Could not close hypervisor interface" ); + rc =xenforeignmemory_close (xch->fmem); +if (rc)PERROR ("Could not close foreign memory interface" );xtl_logger_destroy (xch->dombuild_logger_tofree);xtl_logger_destroy (xch->error_handler_tofree);
tools/libxc/xc_private.h +8 -3
@@ -29,8 +29,13 @@#include <sys/ioctl.h> #include "_paths.h" + +#define XC_WANT_COMPAT_MAP_FOREIGN_API +#define XC_INTERNAL_COMPAT_MAP_FOREIGN_API #include "xenctrl.h" +#include <xencall.h> +#include <xenforeignmemory.h> #include <xen/sys/privcmd.h>
@@ -94,11 +99,11 @@ struct xc_interface_core {FILE *dombuild_logger_file;const char *currently_progress_reporting; -/* Privcmd interface */ -int privcmdfd; -/* Hypercall interface */ xencall_handle *xcall; + +/* Foreign mappings */ +xenforeignmemory_handle *fmem; };int osdep_privcmd_open (xc_interface *xch);
tools/libxc/xc_solaris.c +0 -73
81 lines not on this page · raw message
tools/libxc/xc_sr_restore.c +2 -2
@@ -316,8 +316,8 @@ static int process_page_data(struct xc_sr_context *ctx, unsigned count,if ( nr_pages ==0 ) goto done; - mapping = guest_page =xc_map_foreign_bulk ( - xch, ctx->domid,PROT_READ |PROT_WRITE , + mapping = guest_page =xenforeignmemory_map (xch->fmem, + ctx->domid,PROT_READ |PROT_WRITE , mfns, map_errs, nr_pages);if ( !mapping ) {
tools/libxc/xc_sr_save.c +2 -2
@@ -153,8 +153,8 @@ static int write_batch(struct xc_sr_context *ctx)if ( nr_pages >0 ) { - guest_mapping =xc_map_foreign_bulk ( - xch, ctx->domid,PROT_READ , mfns, errors, nr_pages); + guest_mapping =xenforeignmemory_map (xch->fmem, + ctx->domid,PROT_READ , mfns, errors, nr_pages);if ( !guest_mapping ) {PERROR ("Failed to map guest pages" );
tools/libxc/xg_private.h +1 -2
@@ -26,9 +26,8 @@#include <sys/types.h> #include <sys/stat.h> -#include "xenctrl.h" -#include "xenguest.h" #include "xc_private.h" +#include "xenguest.h" #include <xen/memory.h> #include <xen/elfnote.h>
tools/libxl/libxl_internal.h +1 -0
@@ -50,6 +50,7 @@#include <xenevtchn.h> #include <xenstore.h> +#define XC_WANT_COMPAT_MAP_FOREIGN_API #include <xenctrl.h> #include <xenguest.h> #include <xc_dom.h>
tools/misc/xen-mfndump.c +1 -0
@@ -1,3 +1,4 @@ +#define XC_WANT_COMPAT_MAP_FOREIGN_API #include <xenctrl.h> #include <xc_private.h> #include <xc_core.h>
tools/ocaml/libs/xc/xenctrl_stubs.c +1 -0
@@ -29,6 +29,7 @@#include <stdint.h> #include <string.h> +#define XC_WANT_COMPAT_MAP_FOREIGN_API #include <xenctrl.h> #include "mmap_stubs.h"
tools/python/xen/lowlevel/xc/xc.c +2 -0
@@ -5,6 +5,7 @@*/ #include <Python.h> +#define XC_WANT_COMPAT_MAP_FOREIGN_API #include <xenctrl.h> #include <fcntl.h> #include <netinet/in.h>
@@ -15,6 +16,7 @@#include <netdb.h> #include <arpa/inet.h> +#include <xen/elfnote.h> #include <xen/tmem.h> #include "xc_dom.h" #include <xen/hvm/hvm_info_table.h>
tools/tests/mce-test/tools/xen-mceinj.c +1 -0
@@ -30,6 +30,7 @@#include <signal.h> #include <stdarg.h> +#define XC_WANT_COMPAT_MAP_FOREIGN_API #include <xenctrl.h> #include <xenguest.h> #include <inttypes.h>
tools/tests/mem-sharing/memshrtool.c +1 -0
@@ -11,6 +11,7 @@#include <string.h> #include <sys/mman.h> +#define XC_WANT_COMPAT_MAP_FOREIGN_API #include "xenctrl.h" static int usage (const char * prog)
tools/xenmon/xenbaked.c +1 -0
@@ -38,6 +38,7 @@#include <errno.h> #include <signal.h> #include <xenevtchn.h> +#define XC_WANT_COMPAT_MAP_FOREIGN_API #include <xenctrl.h> #include <xen/xen.h> #include <string.h>
tools/xenpaging/pagein.c +0 -1
@@ -1,6 +1,5 @@/* Trigger a page-in in a separate thread-of-execution to avoid deadlock */ #include <pthread.h> -#include <xc_private.h> #include "xenpaging.h" struct page_in_args {
tools/xenpaging/xenpaging.c +0 -1
@@ -27,7 +27,6 @@#include <signal.h> #include <unistd.h> #include <poll.h> -#include <xc_private.h> #include <xenstore.h> #include <getopt.h>
tools/xenpaging/xenpaging.h +2 -0
@@ -25,6 +25,8 @@#include <xenevtchn.h> +#define XC_WANT_COMPAT_MAP_FOREIGN_API +#include <xenctrl.h> #include <xc_private.h> #include <xen/event_channel.h> #include <xen/vm_event.h>
tools/xenstore/xenstored_core.c +0 -1
@@ -50,7 +50,6 @@#include "xenstored_watch.h" #include "xenstored_transaction.h" #include "xenstored_domain.h" -#include "xenctrl.h" #include "tdb.h" #include "hashtable.h"
tools/xenstore/xenstored_core.h +1 -0
@@ -19,6 +19,7 @@#ifndef _XENSTORED_CORE_H#define _XENSTORED_CORE_H +#define XC_WANT_COMPAT_MAP_FOREIGN_API #include <xenctrl.h> #include <xengnttab.h>
tools/xentrace/xenctx.c +2 -1
@@ -25,7 +25,8 @@#include <getopt.h> #include <limits.h> -#include "xenctrl.h" +#define XC_WANT_COMPAT_MAP_FOREIGN_API +#include <xenctrl.h> #include <xen/foreign/x86_32.h> #include <xen/foreign/x86_64.h> #include <xen/hvm/save.h>
tools/xentrace/xentrace.c +1 -0
@@ -30,6 +30,7 @@#include <xen/xen.h> #include <xen/trace.h> +#define XC_WANT_COMPAT_MAP_FOREIGN_API #include <xenevtchn.h> #include <xenctrl.h>
Signature · 1 line
2.1.4
PATCH v7 14/29 tools/libs/foreignmemory: provide xenforeignmemory_unmap.
In reply to Ian CampbellAnd require it be used instead of direct munmap.
This will allow e.g. Valgrind hooks to help track incorrect use of foreign mappings.
Switch all uses of xenforeignmemory_map to use xenforeignmemory_unmap, not that foreign mappings via the libxc compat xc_map_foreign_* interface will not take advantage of this and will need converting.
---
v4: xenforeignmemory_unmap takes pages not bytes, adjust callers.
v6: Document error behaviour
Use an osdep layer, although there is no current need for common code on _unmap there is for _map so use this indirection for consistency.
--- tools/libs/foreignmemory/freebsd.c | 6 ++++++ tools/libs/foreignmemory/include/xenforeignmemory.h | 11 +++++++++-- tools/libs/foreignmemory/libxenforeignmemory.map | 1 + tools/libs/foreignmemory/linux.c | 6 ++++++ tools/libs/foreignmemory/minios.c | 6 ++++++ tools/libs/foreignmemory/netbsd.c | 6 ++++++ tools/libs/foreignmemory/solaris.c | 6 ++++++ tools/libxc/xc_sr_restore.c | 2 +- tools/libxc/xc_sr_save.c | 2 +- tools/libxc/xc_vm_event.c | 2 +- 10 files changed, 43 insertions(+), 5 deletions(-)
tools/libs/foreignmemory/freebsd.c +6 -0
@@ -118,6 +118,12 @@ void *osdep_xenforeignmemory_map(xenforeignmemory_handle *fmem,return addr; } +int osdep_xenforeignmemory_unmap (xenforeignmemory_handle *fmem, +void *addr,unsigned int num) +{ +return munmap (addr, num <<PAGE_SHIFT ); +} +/* * Local variables: * mode: C
tools/libs/foreignmemory/include/xenforeignmemory.h +9 -2
@@ -44,8 +44,8 @@ int xenforeignmemory_close(xenforeignmemory_handle *xmem);/* * Maps a range within one domain to a local address range. Mappings -* should be unmapped with munmap and should follow the same rules as mmap -* regarding page alignment. +* must be unmapped with xenforeignmemory_unmap and should follow the +* same rules as mmap regarding page alignment. * * prot is as for mmap(2). *
@@ -57,6 +57,13 @@ int xenforeignmemory_close(xenforeignmemory_handle *xmem);void *xenforeignmemory_map (xenforeignmemory_handle *fmem,uint32_t dom,int prot,const xen_pfn_t *arr,int *err,unsigned int num); +/* +* Unmap a mapping previous created with xenforeignmemory_map(). +* +* Returns 0 on success on failure sets errno and returns -1. +*/ +int xenforeignmemory_unmap (xenforeignmemory_handle *fmem, +void *addr,unsigned int num);#endif
tools/libs/foreignmemory/libxenforeignmemory.map +1 -0
@@ -3,5 +3,6 @@ VERS_1.0 { xenforeignmemory_open; xenforeignmemory_close; xenforeignmemory_map; + xenforeignmemory_unmap; local: *; /* Do not expose anything by default */ };
tools/libs/foreignmemory/linux.c +6 -0
@@ -282,6 +282,12 @@ void *osdep_xenforeignmemory_map(xenforeignmemory_handle *fmem,return addr; } +int osdep_xenforeignmemory_unmap (xenforeignmemory_handle *fmem, +void *addr,unsigned int num) +{ +return munmap (addr, (unsigned long )num <<PAGE_SHIFT ); +} +/* * Local variables: * mode: C
tools/libs/foreignmemory/minios.c +6 -0
@@ -51,6 +51,12 @@ void *osdep_xenforeignmemory_map(xenforeignmemory_handle *fmem,return map_frames_ex (arr, num,1 ,0 ,1 , dom, err, pt_prot); } +int osdep_xenforeignmemory_unmap (xenforeignmemory_handle *fmem, +void *addr,unsigned int num) +{ +return munmap (addr, num <<PAGE_SHIFT ); +} +/* * Local variables: * mode: C
tools/libs/foreignmemory/netbsd.c +6 -0
@@ -94,6 +94,12 @@ void *osdep_map_foreign_batch(xenforeignmem_handle *fmem, uint32_t dom, } +int osdep_xenforeignmemory_unmap (xenforeignmemory_handle *fmem, +void *addr,unsigned int num) +{ +return munmap (addr, num*XC_PAGE_SIZE ); +} +/* * Local variables: * mode: C
tools/libs/foreignmemory/solaris.c +6 -0
@@ -91,3 +91,9 @@ void *osdep_map_foreign_batch(xenforeignmem_handle *fmem, uint32_t dom, }return addr; } + +int osdep_xenforeignmemory_unmap (xenforeignmemory_handle *fmem, +void *addr,unsigned int num) +{ +return munmap (addr, num*XC_PAGE_SIZE ); +}
tools/libxc/xc_sr_restore.c +1 -1
@@ -378,7 +378,7 @@ static int process_page_data(struct xc_sr_context *ctx, unsigned count, err:if ( mapping ) -munmap (mapping, nr_pages *PAGE_SIZE ); +xenforeignmemory_unmap (xch->fmem, mapping, nr_pages);free (map_errs);free (mfns);
tools/libxc/xc_sr_save.c +1 -1
@@ -263,7 +263,7 @@ static int write_batch(struct xc_sr_context *ctx) err:free (rec_pfns);if ( guest_mapping ) -munmap (guest_mapping, nr_pages_mapped *PAGE_SIZE ); +xenforeignmemory_unmap (xch->fmem, guest_mapping, nr_pages_mapped);for ( i =0 ; local_pages && i < nr_pfns; ++i )free (local_pages[i]);free (iov);
tools/libxc/xc_vm_event.c +1 -1
@@ -148,7 +148,7 @@ void *xc_vm_event_enable(xc_interface *xch, domid_t domain_id, int param, }if ( ring_page ) -munmap (ring_page,XC_PAGE_SIZE ); +xenforeignmemory_unmap (xch->fmem, ring_page,1 ); ring_page =NULL ; errno = saved_errno;
Signature · 1 line
2.1.4
PATCH v7 15/29 tools/libs/foreignmemory: use size_t for size arguments.
In reply to Ian CampbellSurprisingly it appears no callers need updating.
---
v4: New patch
--- tools/libs/foreignmemory/compat.c | 2 +- tools/libs/foreignmemory/freebsd.c | 4 ++-- .../libs/foreignmemory/include/xenforeignmemory.h | 5 +++-- tools/libs/foreignmemory/linux.c | 23 +++++++++++----------- tools/libs/foreignmemory/minios.c | 4 ++-- tools/libs/foreignmemory/netbsd.c | 2 +- tools/libs/foreignmemory/solaris.c | 2 +- 7 files changed, 22 insertions(+), 20 deletions(-)
tools/libs/foreignmemory/compat.c +1 -1
@@ -23,7 +23,7 @@void *osdep_xenforeignmemory_map (xenforeignmemory_handle *fmem,uint32_t dom,int prot, -const xen_pfn_t *arr,int *err,unsigned int num) +const xen_pfn_t *arr,int *err,size_t num) {xen_pfn_t *pfn;unsigned int i;
tools/libs/foreignmemory/freebsd.c +2 -2
@@ -85,7 +85,7 @@ int osdep_xenforeignmemory_close(xenforeignmemory_handle *fmem)void *osdep_xenforeignmemory_map (xenforeignmemory_handle *fmem,uint32_t dom,int prot,const xen_pfn_t *arr,int *err, -unsigned int num) +size_t num) {int fd = fmem->fd;privcmd_mmapbatch_t ioctlx;
@@ -119,7 +119,7 @@ void *osdep_xenforeignmemory_map(xenforeignmemory_handle *fmem, }int osdep_xenforeignmemory_unmap (xenforeignmemory_handle *fmem, -void *addr,unsigned int num) +void *addr,size_t num) {return munmap (addr, num <<PAGE_SHIFT ); }
tools/libs/foreignmemory/include/xenforeignmemory.h +3 -2
@@ -56,14 +56,15 @@ int xenforeignmemory_close(xenforeignmemory_handle *xmem);*/ void *xenforeignmemory_map (xenforeignmemory_handle *fmem,uint32_t dom,int prot,const xen_pfn_t *arr,int *err, -unsigned int num); +size_t pages); +/* * Unmap a mapping previous created with xenforeignmemory_map(). * * Returns 0 on success on failure sets errno and returns -1. */ int xenforeignmemory_unmap (xenforeignmemory_handle *fmem, -void *addr,unsigned int num); +void *addr,size_t pages);#endif
tools/libs/foreignmemory/linux.c +12 -11
@@ -115,10 +115,11 @@ static int map_foreign_batch_single(int fd, uint32_t dom,* This will keep the request ring full and avoids delays. */ static int retry_paged (int fd,uint32_t dom,void *addr, -const xen_pfn_t *arr,int *err,unsigned int num) +const xen_pfn_t *arr,int *err,size_t num) {privcmd_mmapbatch_v2_t ioctlx; -int rc, paged =0 , i =0 ; +int rc, paged =0 ; +size_t i =0 ; do {
@@ -134,7 +135,7 @@ static int retry_paged(int fd, uint32_t dom, void *addr,/* At least one gfn is still in paging state */ ioctlx.num =1 ; ioctlx.dom = dom; - ioctlx.addr = (unsigned long )addr + ((unsigned long )i<<PAGE_SHIFT ); + ioctlx.addr = (unsigned long )addr + (i<<PAGE_SHIFT ); ioctlx.arr = arr + i; ioctlx.err = err + i;
@@ -160,15 +161,15 @@ out:void *osdep_xenforeignmemory_map (xenforeignmemory_handle *fmem,uint32_t dom,int prot, -const xen_pfn_t *arr,int *err,unsigned int num) +const xen_pfn_t *arr,int *err,size_t num) {int fd = fmem->fd;privcmd_mmapbatch_v2_t ioctlx;void *addr; -unsigned int i; +size_t i;int rc; - addr =mmap (NULL , (unsigned long )num <<PAGE_SHIFT , prot,MAP_SHARED , + addr =mmap (NULL , num <<PAGE_SHIFT , prot,MAP_SHARED , fd,0 );if ( addr ==MAP_FAILED ) {
@@ -212,7 +213,7 @@ void *osdep_xenforeignmemory_map(xenforeignmemory_handle *fmem,if ( pfn ==MAP_FAILED ) {PERROR ("mmap of pfn array failed" ); - (void )munmap (addr, (unsigned long )num <<PAGE_SHIFT ); + (void )munmap (addr, num <<PAGE_SHIFT );return NULL ; } }
@@ -245,7 +246,7 @@ void *osdep_xenforeignmemory_map(xenforeignmemory_handle *fmem,continue ; } rc =map_foreign_batch_single (fd, dom, pfn + i, - (unsigned long )addr + ((unsigned long )i<<PAGE_SHIFT )); + (unsigned long )addr + (i<<PAGE_SHIFT ));if ( rc <0 ) { rc = -errno;
@@ -274,7 +275,7 @@ void *osdep_xenforeignmemory_map(xenforeignmemory_handle *fmem,int saved_errno = errno;PERROR ("ioctl failed" ); - (void )munmap (addr, (unsigned long )num <<PAGE_SHIFT ); + (void )munmap (addr, num <<PAGE_SHIFT ); errno = saved_errno;return NULL ; }
@@ -283,9 +284,9 @@ void *osdep_xenforeignmemory_map(xenforeignmemory_handle *fmem, }int osdep_xenforeignmemory_unmap (xenforeignmemory_handle *fmem, -void *addr,unsigned int num) +void *addr,size_t num) { -return munmap (addr, (unsigned long )num <<PAGE_SHIFT ); +return munmap (addr, num <<PAGE_SHIFT ); }/*
tools/libs/foreignmemory/minios.c +2 -2
@@ -41,7 +41,7 @@ int osdep_xenforeignmemory_close(xenforeignmemory_handle *fmem)void *osdep_xenforeignmemory_map (xenforeignmemory_handle *fmem,uint32_t dom,int prot, -const xen_pfn_t *arr,int *err,unsigned int num) +const xen_pfn_t *arr,int *err,size_t num) {unsigned long pt_prot =0 ;if (prot &PROT_READ )
@@ -52,7 +52,7 @@ void *osdep_xenforeignmemory_map(xenforeignmemory_handle *fmem, }int osdep_xenforeignmemory_unmap (xenforeignmemory_handle *fmem, -void *addr,unsigned int num) +void *addr,size_t num) {return munmap (addr, num <<PAGE_SHIFT ); }
tools/libs/foreignmemory/netbsd.c +1 -1
@@ -95,7 +95,7 @@ void *osdep_map_foreign_batch(xenforeignmem_handle *fmem, uint32_t dom, }int osdep_xenforeignmemory_unmap (xenforeignmemory_handle *fmem, -void *addr,unsigned int num) +void *addr,size_t num) {return munmap (addr, num*XC_PAGE_SIZE ); }
tools/libs/foreignmemory/solaris.c +1 -1
@@ -93,7 +93,7 @@ void *osdep_map_foreign_batch(xenforeignmem_handle *fmem, uint32_t dom, }int osdep_xenforeignmemory_unmap (xenforeignmemory_handle *fmem, -void *addr,unsigned int num) +void *addr,size_t num) {return munmap (addr, num*XC_PAGE_SIZE ); }
Signature · 1 line
2.1.4
PATCH v7 16/29 tools/libs/foreignmemory: Mention restrictions on fork in docs.
In reply to Ian Campbell---
v6: Also discuss recovering the memory.
v7: Further clarifications regarding forking based on ML discussions.
(Dropped Wei's ack)
--- .../libs/foreignmemory/include/xenforeignmemory.h | 33 +++++++++++++++++++++- 1 file changed, 32 insertions(+), 1 deletion(-)
tools/libs/foreignmemory/include/xenforeignmemory.h +32 -1
@@ -32,13 +32,44 @@ typedef struct xentoollog_logger xentoollog_logger;typedef struct xenforeignmemory_handle xenforeignmemory_handle ;/* -* Return a handle onto the hypercall driver. Logs errors. +* Return a handle onto the foreign memory mapping driver. Logs errors. +* +* Note: After fork(2) a child process must not use any opened +* foreignmemory handle inherited from their parent, nor access any +* grant mapped areas associated with that handle. +* +* The child must open a new handle if they want to interact with +* foreignmemory. +* +* Calling exec(2) in a child will safely (and reliably) reclaim any +* resources which were allocated via a xenforeignmemory_handle in the +* parent. +* +* A child which does not call exec(2) may safely call +* xenforeignmemory_close() on a xenforeignmemory_handle inherited +* from their parent. This will attempt to reclaim any resources +* associated with that handle. Note that in some implementations this +* reclamation may not be completely effective, in this case any +* affected resources remain allocated. +* +* Calling xenforeignmemory_close() is the only safe operation on a +* xenforeignmemory_handle which has been inherited. */ xenforeignmemory_handle *xenforeignmemory_open (xentoollog_logger *logger,unsigned open_flags);/* * Close a handle previously allocated with xenforeignmemory_open(). +* +* Under normal circumstances (i.e. not in the child after a fork) +* xenforeignmemory_unmap() should be used on all mappings allocated +* by xenforeignmemory_map() prior to closing the handle in order to +* free up resources associated with those mappings. +* +* This is the only function which may be safely called on a +* xenforeignmemory_handle in a child after a +* fork. xenforeignmemory_unmap() must not be called under such +* circumstances. */ int xenforeignmemory_close (xenforeignmemory_handle *xmem);
Signature · 1 line
2.1.4
PATCH v7 17/29 tools/libs/foreignmemory: Support err == NULL to map.
In reply to Ian CampbellThe existing xc_map_foreign_bulk-like interface encourages callers to miss error checking for partial failure (by forgetting to scan the err array).
Add support for passing err==NULL which behaves in a xc_map_foreign_pages-like manner and returns a global error for any failure.
While documenting this also clarify the overall behaviour and the behaviour with err!=NULL.
With this the compat wrapper of xc_map_foreign_pages() can be simplified.
---
v7: Check for NULL when allocating err.
v6: New
--- tools/libs/foreignmemory/core.c | 33 +++++++++++++++++++++- .../libs/foreignmemory/include/xenforeignmemory.h | 24 ++++++++++++++-- tools/libxc/xc_foreign_memory.c | 22 +-------------- 3 files changed, 54 insertions(+), 25 deletions(-)
tools/libs/foreignmemory/core.c +32 -1
@@ -14,6 +14,8 @@*/ #include <stdlib.h> +#include <assert.h> +#include <errno.h> #include "private.h"
@@ -64,7 +66,36 @@ void *xenforeignmemory_map(xenforeignmemory_handle *fmem, uint32_t dom, int prot, const xen_pfn_t *arr, int *err, size_t num) { - return osdep_xenforeignmemory_map(fmem, dom, prot, arr, err, num); + void *ret; +int *err_to_free =NULL ; + +if ( err ==NULL ) + err = err_to_free =malloc (num *sizeof (int )); + +if ( err ==NULL ) +return NULL ; + + ret =osdep_xenforeignmemory_map (fmem, dom, prot, arr, err, num); + +if ( ret ==0 && err_to_free ) + { +int i; + +for ( i =0 ; i < num ; i++ ) + { +if ( err[i] ) + { + errno = -err[i]; + (void )osdep_xenforeignmemory_unmap (fmem, ret, num); + ret =NULL ; +break ; + } + } + } + +free (err_to_free); + +return ret; } int xenforeignmemory_unmap(xenforeignmemory_handle *fmem,
tools/libs/foreignmemory/include/xenforeignmemory.h +21 -3
@@ -80,10 +80,28 @@ int xenforeignmemory_close(xenforeignmemory_handle *xmem);* * prot is as for mmap(2). * -* Can partially succeed. When a page cannot be mapped, its respective -* field in @err is set to the corresponding errno value. +* @arr is an array of @pages gfns to be mapped linearly in the local +* address range. @err is an (optional) output array used to report +* per-page errors, as errno values. * -* Returns NULL if no pages can be mapped. +* If @err is given (is non-NULL) then the mapping may partially +* succeed and return a valid pointer while also using @err to +* indicate the success (0) or failure (errno value) of the individual +* pages. The global errno thread local variable is not valid in this +* case. +* +* If @err is not given (is NULL) then on failure to map any page any +* successful mappings will be undone and NULL will be returned. errno +* will be set to correspond to the first failure (which may not be +* the most critical). +* +* It is also possible to return NULL due to a complete failure, +* i.e. failure to even attempt the mapping, in this case the global +* errno will have been set and the contents of @err (if given) is +* invalid. +* +* Note that it is also possible to return non-NULL with the contents +* of @err indicating failure to map every page. */ void *xenforeignmemory_map(xenforeignmemory_handle *fmem, uint32_t dom, int prot, const xen_pfn_t *arr, int *err,
tools/libxc/xc_foreign_memory.c +1 -21
@@ -23,32 +23,12 @@void *xc_map_foreign_pages (xc_interface *xch,uint32_t dom,int prot,const xen_pfn_t *arr,int num) { -void *res; -int i, *err; -if (num <0 ) { errno =EINVAL ;return NULL ; } - err =malloc (num *sizeof (*err)); -if (!err) -return NULL ; - - res =xenforeignmemory_map (xch->fmem, dom, prot, arr, err, num); -if (res) { -for (i =0 ; i < num; i++) { -if (err[i]) { - errno = -err[i]; -munmap (res, num *PAGE_SIZE ); - res =NULL ; -break ; - } - } - } - -free (err); -return res; +return xenforeignmemory_map (xch->fmem, dom, prot, arr,NULL , num); } void *xc_map_foreign_range(xc_interface *xch,
Signature · 1 line
2.1.4
PATCH v7 18/29 tools/libs/foreignmemory: pull array length argument to map forward
In reply to Ian CampbellBy having the "num" argument before the page and error arrays we can potentially use a variable-length-array argument ("int pages[num]") in the function prototype.
However VLAs are a C99 feature and we are currently targetting C89 and later, so we don't actually make use of this here, merely arrange that we can switch to VLAs in the future without changing the function ABI.
---
v6: New
--- tools/libs/foreignmemory/compat.c | 4 ++-- tools/libs/foreignmemory/core.c | 5 +++-- tools/libs/foreignmemory/freebsd.c | 4 ++-- tools/libs/foreignmemory/include/xenforeignmemory.h | 4 ++-- tools/libs/foreignmemory/linux.c | 3 ++- tools/libs/foreignmemory/minios.c | 3 ++- tools/libs/foreignmemory/private.h | 3 ++- tools/libxc/xc_foreign_memory.c | 4 ++-- tools/libxc/xc_sr_restore.c | 2 +- tools/libxc/xc_sr_save.c | 2 +- 10 files changed, 19 insertions(+), 15 deletions(-)
tools/libs/foreignmemory/compat.c +2 -2
@@ -22,8 +22,8 @@#include "private.h" void *osdep_xenforeignmemory_map (xenforeignmemory_handle *fmem, -uint32_t dom,int prot, -const xen_pfn_t *arr,int *err,size_t num) +uint32_t dom,int prot,size_t num, +const xen_pfn_t arr[/*num*/ ],int err[/*num*/ ]) {xen_pfn_t *pfn;unsigned int i;
tools/libs/foreignmemory/core.c +3 -2
@@ -64,7 +64,8 @@ int xenforeignmemory_close(xenforeignmemory_handle *fmem)void *xenforeignmemory_map (xenforeignmemory_handle *fmem,uint32_t dom,int prot, -const xen_pfn_t *arr,int *err,size_t num) +size_t num, +const xen_pfn_t arr[/*num*/ ],int err[/*num*/ ]) {void *ret;int *err_to_free =NULL ;
@@ -75,7 +76,7 @@ void *xenforeignmemory_map(xenforeignmemory_handle *fmem,if ( err ==NULL )return NULL ; - ret =osdep_xenforeignmemory_map (fmem, dom, prot, arr, err, num); + ret =osdep_xenforeignmemory_map (fmem, dom, prot, num, arr, err);if ( ret ==0 && err_to_free ) {
tools/libs/foreignmemory/freebsd.c +2 -2
@@ -84,8 +84,8 @@ int osdep_xenforeignmemory_close(xenforeignmemory_handle *fmem)void *osdep_xenforeignmemory_map (xenforeignmemory_handle *fmem,uint32_t dom,int prot, -const xen_pfn_t *arr,int *err, -size_t num) +size_t num, +const xen_pfn_t arr[/*num*/ ],int err[/*num*/ ]) {int fd = fmem->fd;privcmd_mmapbatch_t ioctlx;
tools/libs/foreignmemory/include/xenforeignmemory.h +2 -2
@@ -104,8 +104,8 @@ int xenforeignmemory_close(xenforeignmemory_handle *xmem);* of @err indicating failure to map every page. */ void *xenforeignmemory_map (xenforeignmemory_handle *fmem,uint32_t dom, -int prot,const xen_pfn_t *arr,int *err, -size_t pages); +int prot,size_t pages, +const xen_pfn_t arr[/*pages*/ ],int err[/*pages*/ ]);/* * Unmap a mapping previous created with xenforeignmemory_map().
tools/libs/foreignmemory/linux.c +2 -1
@@ -161,7 +161,8 @@ out:void *osdep_xenforeignmemory_map (xenforeignmemory_handle *fmem,uint32_t dom,int prot, -const xen_pfn_t *arr,int *err,size_t num) +size_t num, +const xen_pfn_t arr[/*num*/ ],int err[/*num*/ ]) {int fd = fmem->fd;privcmd_mmapbatch_v2_t ioctlx;
tools/libs/foreignmemory/minios.c +2 -1
@@ -41,7 +41,8 @@ int osdep_xenforeignmemory_close(xenforeignmemory_handle *fmem)void *osdep_xenforeignmemory_map (xenforeignmemory_handle *fmem,uint32_t dom,int prot, -const xen_pfn_t *arr,int *err,size_t num) +size_t num, +const xen_pfn_t arr[/*num*/ ],int err[/*num*/ ]) {unsigned long pt_prot =0 ;if (prot &PROT_READ )
tools/libs/foreignmemory/private.h +2 -1
@@ -27,7 +27,8 @@ int osdep_xenforeignmemory_close(xenforeignmemory_handle *fmem);void *osdep_xenforeignmemory_map (xenforeignmemory_handle *fmem,uint32_t dom,int prot, -const xen_pfn_t *arr,int *err,size_t num); +size_t num, +const xen_pfn_t arr[num],int err[num]);int osdep_xenforeignmemory_unmap (xenforeignmemory_handle *fmem,void *addr,size_t num);
tools/libxc/xc_foreign_memory.c +2 -2
@@ -28,7 +28,7 @@ void *xc_map_foreign_pages(xc_interface *xch, uint32_t dom, int prot,return NULL ; } -return xenforeignmemory_map (xch->fmem, dom, prot, arr,NULL , num); +return xenforeignmemory_map (xch->fmem, dom, prot, num, arr,NULL ); } void *xc_map_foreign_range(xc_interface *xch,
@@ -84,7 +84,7 @@ void *xc_map_foreign_ranges(xc_interface *xch,void *xc_map_foreign_bulk (xc_interface *xch,uint32_t dom,int prot,const xen_pfn_t *arr,int *err,unsigned int num) { -return xenforeignmemory_map (xch->fmem, dom, prot, arr, err, num); +return xenforeignmemory_map (xch->fmem, dom, prot, num, arr, err); }/*
tools/libxc/xc_sr_restore.c +1 -1
@@ -318,7 +318,7 @@ static int process_page_data(struct xc_sr_context *ctx, unsigned count, mapping = guest_page =xenforeignmemory_map (xch->fmem, ctx->domid,PROT_READ |PROT_WRITE , - mfns, map_errs, nr_pages); + nr_pages, mfns, map_errs);if ( !mapping ) { rc =-1 ;
tools/libxc/xc_sr_save.c +1 -1
@@ -154,7 +154,7 @@ static int write_batch(struct xc_sr_context *ctx)if ( nr_pages >0 ) { guest_mapping =xenforeignmemory_map (xch->fmem, - ctx->domid,PROT_READ , mfns, errors, nr_pages); + ctx->domid,PROT_READ , nr_pages, mfns, errors);if ( !guest_mapping ) {PERROR ("Failed to map guest pages" );
Signature · 1 line
2.1.4
PATCH v7 19/29 tools/libs/evtchn: Review and update doc comments.
In reply to Ian CampbellRemove the reference to pre-4.1, since this is now a new library.
Fixup references to xc.
--- tools/libs/evtchn/include/xenevtchn.h | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)
tools/libs/evtchn/include/xenevtchn.h +2 -4
@@ -46,11 +46,9 @@ typedef struct xentoollog_logger xentoollog_logger;* which case errno will be set appropriately. * * Note: -* After fork a child process must not use any opened xc evtchn +* After fork a child process must not use any opened evtchn * handle inherited from their parent. They must open a new handle if -* they want to interact with xc. -* -* Before Xen pre-4.1 this function would sometimes report errors with perror. +* they want to interact with evtchn. */ /* Currently no flags are defined */ xenevtchn_handle *xenevtchn_open (xentoollog_logger *logger,unsigned open_flags);
Signature · 1 line
2.1.4
PATCH v7 20/29 tools/libs: Clean up hard tabs.
In reply to Ian CampbellThese were wrong in the context of libxc before this code was extracted, clean them up.
Also add some emacs magic blocks
--- tools/libs/call/buffer.c | 4 ++-- tools/libs/call/core.c | 2 +- tools/libs/call/minios.c | 4 ++-- tools/libs/evtchn/minios.c | 28 ++++++++++++++-------------- tools/libs/evtchn/netbsd.c | 12 ++++++------ tools/libs/foreignmemory/freebsd.c | 2 +- tools/libs/foreignmemory/minios.c | 6 +++--- tools/libs/foreignmemory/netbsd.c | 2 +- tools/libs/foreignmemory/private.h | 2 +- tools/libs/foreignmemory/solaris.c | 12 +++++++++++- tools/libs/gnttab/include/xengnttab.h | 4 ++-- tools/libs/gnttab/linux.c | 6 +++--- tools/libs/toollog/xtl_logger_stdio.c | 2 +- 13 files changed, 48 insertions(+), 38 deletions(-)
tools/libs/call/buffer.c +2 -2
@@ -20,7 +20,7 @@#include "private.h" #define DBGPRINTF(_m...) \ - xtl_log(xcall->logger, XTL_DEBUG, -1, "xencall:buffer", _m) + xtl_log(xcall->logger, XTL_DEBUG, -1, "xencall:buffer", _m)#define ROUNDUP (_x,_w) (((unsigned long)(_x)+(1UL<<(_w))-1) & ~((1UL<<(_w))-1))
@@ -86,7 +86,7 @@ static int cache_free(xencall_handle *xcall, void *p, size_t nr_pages) xcall->buffer_current_allocations--;if ( nr_pages ==1 && - xcall->buffer_cache_nr <BUFFER_CACHE_SIZE ) + xcall->buffer_cache_nr <BUFFER_CACHE_SIZE ) { xcall->buffer_cache[xcall->buffer_cache_nr++] = p; rc =1 ;
tools/libs/call/core.c +1 -1
@@ -19,7 +19,7 @@xencall_handle *xencall_open (xentoollog_logger *logger,unsigned open_flags) { -xencall_handle *xcall =malloc (sizeof (*xcall)); +xencall_handle *xcall =malloc (sizeof (*xcall));int rc;if (!xcall)return NULL ;
tools/libs/call/minios.c +2 -2
@@ -50,8 +50,8 @@ int osdep_hypercall(xencall_handle *xcall, privcmd_hypercall_t *hypercall) ret =HYPERVISOR_multicall (&call,1 );if (ret <0 ) { - errno = -ret; -return -1 ; + errno = -ret; +return -1 ; }if ((long ) call.result <0 ) { errno = - (long ) call.result;
tools/libs/evtchn/minios.c +14 -14
@@ -103,8 +103,8 @@ int xenevtchn_notify(xenevtchn_handle *xce, evtchn_port_t port) ret =notify_remote_via_evtchn (port);if (ret <0 ) { - errno = -ret; - ret =-1 ; + errno = -ret; + ret =-1 ; }return ret; }
@@ -138,16 +138,16 @@ evtchn_port_or_error_t xenevtchn_bind_unbound_port(xenevtchn_handle *xce, int doassert (get_current () == main_thread); port_info =port_alloc (fd);if (port_info ==NULL ) -return -1 ; +return -1 ;printf ("xenevtchn_bind_unbound_port(%d)" , domid); ret =evtchn_alloc_unbound (domid, evtchn_handler, (void *)(intptr_t )fd, &port);printf (" = %d\n" , ret);if (ret <0 ) { -port_dealloc (port_info); - errno = -ret; -return -1 ; +port_dealloc (port_info); + errno = -ret; +return -1 ; } port_info->bound =1 ; port_info->port = port;
@@ -166,16 +166,16 @@ evtchn_port_or_error_t xenevtchn_bind_interdomain(xenevtchn_handle *xce, int domassert (get_current () == main_thread); port_info =port_alloc (fd);if (port_info ==NULL ) -return -1 ; +return -1 ;printf ("xenevtchn_bind_interdomain(%d, %" PRId32")" , domid, remote_port); ret =evtchn_bind_interdomain (domid, remote_port, evtchn_handler, (void *)(intptr_t )fd, &local_port);printf (" = %d\n" , ret);if (ret <0 ) { -port_dealloc (port_info); - errno = -ret; -return -1 ; +port_dealloc (port_info); + errno = -ret; +return -1 ; } port_info->bound =1 ; port_info->port = local_port;
@@ -208,15 +208,15 @@ evtchn_port_or_error_t xenevtchn_bind_virq(xenevtchn_handle *xce, unsigned int vassert (get_current () == main_thread); port_info =port_alloc (fd);if (port_info ==NULL ) -return -1 ; +return -1 ;printf ("xenevtchn_bind_virq(%d)" , virq); port =bind_virq (virq, evtchn_handler, (void *)(intptr_t )fd);if (port <0 ) { -port_dealloc (port_info); - errno = -port; -return -1 ; +port_dealloc (port_info); + errno = -port; +return -1 ; } port_info->bound =1 ; port_info->port = port;
tools/libs/evtchn/netbsd.c +6 -6
@@ -72,9 +72,9 @@ evtchn_port_or_error_t xenevtchn_bind_unbound_port(xenevtchn_handle * xce, int d ret =ioctl (fd,IOCTL_EVTCHN_BIND_UNBOUND_PORT , &bind);if (ret ==0 ) -return bind.port; +return bind.port;else -return -1 ; +return -1 ; } evtchn_port_or_error_t xenevtchn_bind_interdomain(xenevtchn_handle *xce, int domid,
@@ -89,9 +89,9 @@ evtchn_port_or_error_t xenevtchn_bind_interdomain(xenevtchn_handle *xce, int dom ret =ioctl (fd,IOCTL_EVTCHN_BIND_INTERDOMAIN , &bind);if (ret ==0 ) -return bind.port; +return bind.port;else -return -1 ; +return -1 ; }int xenevtchn_unbind (xenevtchn_handle *xce,evtchn_port_t port)
@@ -114,9 +114,9 @@ evtchn_port_or_error_t xenevtchn_bind_virq(xenevtchn_handle *xce, unsigned int v err =ioctl (fd,IOCTL_EVTCHN_BIND_VIRQ , &bind);if (err) -return -1 ; +return -1 ;else -return bind.port; +return bind.port; }evtchn_port_or_error_t xenevtchn_pending (xenevtchn_handle *xce)
tools/libs/foreignmemory/freebsd.c +1 -1
@@ -121,7 +121,7 @@ void *osdep_xenforeignmemory_map(xenforeignmemory_handle *fmem,int osdep_xenforeignmemory_unmap (xenforeignmemory_handle *fmem,void *addr,size_t num) { -return munmap (addr, num <<PAGE_SHIFT ); +return munmap (addr, num <<PAGE_SHIFT ); }/*
tools/libs/foreignmemory/minios.c +3 -3
@@ -46,16 +46,16 @@ void *osdep_xenforeignmemory_map(xenforeignmemory_handle *fmem, {unsigned long pt_prot =0 ;if (prot &PROT_READ ) - pt_prot =L1_PROT_RO ; + pt_prot =L1_PROT_RO ;if (prot &PROT_WRITE ) - pt_prot =L1_PROT ; + pt_prot =L1_PROT ;return map_frames_ex (arr, num,1 ,0 ,1 , dom, err, pt_prot); }int osdep_xenforeignmemory_unmap (xenforeignmemory_handle *fmem,void *addr,size_t num) { -return munmap (addr, num <<PAGE_SHIFT ); +return munmap (addr, num <<PAGE_SHIFT ); }/*
tools/libs/foreignmemory/netbsd.c +1 -1
@@ -97,7 +97,7 @@ void *osdep_map_foreign_batch(xenforeignmem_handle *fmem, uint32_t dom,int osdep_xenforeignmemory_unmap (xenforeignmemory_handle *fmem,void *addr,size_t num) { -return munmap (addr, num*XC_PAGE_SIZE ); +return munmap (addr, num*XC_PAGE_SIZE ); }/*
tools/libs/foreignmemory/private.h +1 -1
@@ -39,7 +39,7 @@ void *compat_mapforeign_batch(xenforeignmem_handle *fmem, uint32_t dom,#endif #define PERROR(_f...) \ - xtl_log(fmem->logger, XTL_ERROR, errno, "xenforeignmemory", _f) + xtl_log(fmem->logger, XTL_ERROR, errno, "xenforeignmemory", _f)#endif
tools/libs/foreignmemory/solaris.c +11 -1
@@ -95,5 +95,15 @@ void *osdep_map_foreign_batch(xenforeignmem_handle *fmem, uint32_t dom,int osdep_xenforeignmemory_unmap (xenforeignmemory_handle *fmem,void *addr,size_t num) { -return munmap (addr, num*XC_PAGE_SIZE ); +return munmap (addr, num*XC_PAGE_SIZE ); } + +/* +* Local variables: +* mode: C +* c-file-style: "BSD" +* c-basic-offset: 4 +* tab-width: 4 +* indent-tabs-mode: nil +* End: +*/
tools/libs/gnttab/include/xengnttab.h +2 -2
@@ -142,7 +142,7 @@ int xengnttab_unmap(xengnttab_handle *xgt, void *start_address, uint32_t count);* of grants. */ int xengnttab_set_max_grants (xengnttab_handle *xgt, -uint32_t count); +uint32_t count);/* * Grant Sharing Interface (allocating and granting pages)
@@ -160,7 +160,7 @@ typedef struct xengntdev_handle xengntshr_handle;* */ xengntshr_handle *xengntshr_open (xentoollog_logger *logger, -unsigned open_flags); +unsigned open_flags);/* * Close a handle previously allocated with xengntshr_open().
tools/libs/gnttab/linux.c +3 -3
@@ -294,9 +294,9 @@ void *osdep_gntshr_share_pages(xengntshr_handle *xgs, err =ioctl (fd,IOCTL_GNTALLOC_SET_UNMAP_NOTIFY , ¬ify);if (err) {GSERROR (xgs->logger,"ioctl SET_UNMAP_NOTIFY failed" ); -munmap (area, count *PAGE_SIZE ); - area =NULL ; - } +munmap (area, count *PAGE_SIZE ); + area =NULL ; + }memcpy (refs, gref_info->gref_ids, count *sizeof (uint32_t ));
tools/libs/toollog/xtl_logger_stdio.c +1 -1
@@ -135,7 +135,7 @@ static void stdiostream_progress(struct xentoollog_logger *logger_in, newpel =fprintf (lg->f,"%s%s" "%s: %lu/%lu %3d%%%s" , context?context:"" , context?": " :"" , doing_what, done, total, percent, - done == total ?"\n" :"" ); + done == total ?"\n" :"" ); extra_erase = lg->progress_erase_len - newpel;if (extra_erase >0 )
Signature · 1 line
2.1.4
PATCH v7 21/29 tools/libs/gnttab: Extensive updates to API documentation.
In reply to Ian CampbellIn particular around error handling, behaviour on fork and the unmap notification mechanism.
Behaviour of xengnttab_map_*grant_refs and xengntshr_share_pages on partial failure has been confirmed/inferred (by inspection) on Linux and Mini-os (the only two known implementations. Likewise the behaviour of the notification mechanism has been confirmed/inferred (by inspection) of the Linux implementation (currently the only implementation) and libvchan (primary known user).
These updates are not folded into "tools: Refactor /dev/xen/gnt{dev,shr} wrappers into libxengnttab." to try and reduce the amount of non-movement changes in that patch.
While I'm not convinced by javadoc/doxygen cause the existing comments which appear to use that syntax to have the appropriate /** marker.
Also fix a typo in a code comment.
---
v7: Typo.
Updates based on Ian Jackson's review.
Even more updates to the discussion of forking based on ML discussion.
v6: Rewrapped a comment.
Incorported much review from Ian on the API, retitled (was:
"tools/libs/gnttab: Review and update doc comments.") and dropped acks
--- tools/libs/gnttab/include/xengnttab.h | 201 +++++++++++++++++++++++++++++----- tools/libs/gnttab/linux.c | 12 +- 2 files changed, 181 insertions(+), 32 deletions(-)
tools/libs/gnttab/include/xengnttab.h +174 -27
@@ -31,28 +31,124 @@typedef struct xentoollog_logger xentoollog_logger ;/* +* PRODUCING AND CONSUMING GRANT REFERENCES +* ======================================== +* +* The xengnttab library contains two distinct interfaces, each with +* their own distinct handle type and entry points. The represent the +* two sides of the grant table interface, producer (gntshr) and +* consumer (gnttab). +* +* The xengnttab_* interfaces take a xengnttab_handle and provide +* mechanisms for consuming (i.e. mapping or copying to/from) grant +* references provided by a peer. +* +* The xengntshr_* interfaces take a xengntshr_handle and provide a +* mechanism to produce grantable memory and grant references to that +* memory, which can be handed to some peer. +* +* UNMAP NOTIFICATION +* ================== +* +* The xengnt{tab,shr}_*_notify interfaces implement a cooperative +* interface which is intended to allow the underlying kernel +* interfaces to attempt to notify the peer to perform graceful +* teardown upon failure (i.e. crash or exit) of the process on their +* end. +* +* These interfaces operate on a single page only and are intended for +* use on the main shared-ring page of a protocol. It is assumed that +* on teardown both ends would automatically teardown all grants +* associated with the protocol in addition to the shared ring itself. +* +* Each end is able to optionally nominate a byte offset within the +* shared page or an event channel or both. On exit of the process the +* underlying kernel driver will zero the byte at the given offset and +* signal the event channel. +* +* The event channel can be the same event channel used for regular +* ring progress notifications, or may be a dedicated event channel. +* +* Both ends may share the same notification byte offset within the +* shared page, or may have dedicated "client" and "server" status +* bytes. +* +* Since the byte is cleared on shutdown the protocol must use 0 as +* the "closed/dead" status, but is permitted to use any other non-0 +* values to indicate various other "live" states (waiting for +* connection, connected, etc). +* +* Both ends are permitted to modify (including clear) their +* respective status bytes and to signal the event channel themselves +* from userspace. +* +* Depending on the mechanisms which have been registered an +* the peer may receive a shutdown notification as: +* +* - An event channel notification on a dedicated event channel +* - Observation of the other ends's status byte being cleared +* (whether in response to an explicit notification or in the +* course of normal operation). +* +* The mechanism should be defined as part of the specific ring +* protocol. +* +* Upon receiving notification of the peer is expected to teardown any +* resources (and in particular any grant mappings) in a timely +* manner. +* +* NOTE: this protocol is intended to allow for better error behaviour +* and recovery between two cooperating peers. It does not cover the +* case of a malivious peer who may continue to hold resources open. +*/ + +/* * Grant Table Interface (making use of grants from other domains) */ typedef struct xengntdev_handle xengnttab_handle ;/* -* Note: -* After fork a child process must not use any opened xc gnttab -* handle inherited from their parent. They must open a new handle if -* they want to interact with xc. +* Returns a handle onto the grant table driver. Logs errors. +* +* Note: After fork(2) a child process must not use any opened gnttab +* handle inherited from their parent, nor access any grant mapped +* areas associated with that handle. * -* Return an fd onto the grant table driver. Logs errors. +* The child must open a new handle if they want to interact with +* gnttab. +* +* Calling exec(2) in a child will safely (and reliably) reclaim any +* resources which were allocated via a xengnttab_handle in the parent. +* +* A child which does not call exec(2) may safely call +* xengnttab_close() on a xengnttab_handle inherited from their +* parent. This will attempt to reclaim any resources associated with +* that handle. Note that in some implementations this reclamation may +* not be completely effective, in this case any affected resources +* remain allocated. +* +* Calling xengnttab_close() is the only safe operation on a +* xengnttab_handle which has been inherited. xengnttab_unmap() must +* not be called under such circumstances. */ xengnttab_handle *xengnttab_open (xentoollog_logger *logger,unsigned open_flags);/* -* Close a handle previously allocated with xengnttab_open(). -* Never logs errors. +* Close a handle previously allocated with xengnttab_open(), +* including unmaping any current grant maps. Never logs errors. +* +* Under normal circumstances (i.e. not in the child after a fork) +* xengnttab_unmap() should be used on all mappings allocated through +* a xengnttab_handle prior to closing the handle in order to free up +* resources associated with those mappings. +* +* This is the only function which may be safely called on a +* xengnttab_handle in a child after a fork. */ int xengnttab_close (xengnttab_handle *xgt); -/* +/** * Memory maps a grant reference from one domain to a local address range. * Mappings should be unmapped with xengnttab_unmap. Logs errors. *
@@ -71,6 +167,10 @@ void *xengnttab_map_grant_ref(xengnttab_handle *xgt,* contiguous local address range. Mappings should be unmapped with * xengnttab_unmap. Logs errors. * +* On failure (including partial failure) sets errno and returns +* NULL. On partial failure no mappings are established (any partial +* work is undone). +* * @parm xgt a handle on an open grant table interface * @parm count the number of grant references to be mapped * @parm domids an array of @count domain IDs by which the corresponding @refs
@@ -89,6 +189,9 @@ void *xengnttab_map_grant_refs(xengnttab_handle *xgt,* contiguous local address range. Mappings should be unmapped with * xengnttab_unmap. Logs errors. * +* This call is equivalent to calling @xengnttab_map_grant_refs with a +* @domids array with every entry set to @domid. +* * @parm xgt a handle on an open grant table interface * @parm count the number of grant references to be mapped * @parm domid the domain to map memory from
@@ -109,6 +212,11 @@ void *xengnttab_map_domain_grant_refs(xengnttab_handle *xgt,* unmapped, the byte at the given offset will be zeroed and a wakeup will be * sent to the given event channel. Logs errors. * +* On failure sets errno and returns NULL. +* +* If notify_offset or notify_port are requested and cannot be set up +* an error will be returned and no mapping will be made. +* * @parm xgt a handle on an open grant table interface * @parm domid the domain to map memory from * @parm ref the grant reference ID to map
@@ -124,15 +232,20 @@ void *xengnttab_map_grant_ref_notify(xengnttab_handle *xgt,uint32_t notify_offset, evtchn_port_t notify_port); -/* -* Unmaps the @count pages starting at @start_address, which were mapped by a -* call to xengnttab_map_grant_ref or xengnttab_map_grant_refs. Never logs. +/** +* Unmaps the @count pages starting at @start_address, which were +* mapped by a call to xengnttab_map_grant_ref, +* xengnttab_map_grant_refs or xengnttab_map_grant_ref_notify. Never +* logs. +* +* If the mapping was made using xengnttab_map_grant_ref_notify() with +* either notify_offset or notify_port then the peer will be notified. */ int xengnttab_unmap (xengnttab_handle *xgt,void *start_address,uint32_t count); -/* -* Sets the maximum number of grants that may be mapped by the given instance -* to @count. Never logs. +/** +* Sets the maximum number of grants that may be mapped by the given +* instance to @count. Never logs. * * N.B. This function must be called after opening the handle, and before any * other functions are invoked on it.
@@ -142,22 +255,37 @@ int xengnttab_unmap(xengnttab_handle *xgt, void *start_address, uint32_t count);* of grants. */ int xengnttab_set_max_grants (xengnttab_handle *xgt, -uint32_t count); +uint32_t nr_grants);/* -* Grant Sharing Interface (allocating and granting pages) +* Grant Sharing Interface (allocating and granting pages to others) */ typedef struct xengntdev_handle xengntshr_handle ;/* -* Return an fd onto the grant sharing driver. Logs errors. +* Returns a handle onto the grant sharing driver. Logs errors. +* +* Note: After fork(2) a child process must not use any opened gntshr +* handle inherited from their parent, nor access any grant mapped +* areas associated with that handle. +* +* The child must open a new handle if they want to interact with +* gntshr. * -* Note: -* After fork a child process must not use any opened xc gntshr -* handle inherited from their parent. They must open a new handle if -* they want to interact with xc. +* Calling exec(2) in a child will safely (and reliably) reclaim any +* resources which were allocated via a xengntshr_handle in the +* parent. * +* A child which does not call exec(2) may safely call +* xengntshr_close() on a xengntshr_handle inherited from their +* parent. This will attempt to reclaim any resources associated with +* that handle. Note that in some implementations this reclamation may +* not be completely effective, in this case any affected resources +* remain allocated. +* +* Calling xengntshr_close() is the only safe operation on a +* xengntshr_handle which has been inherited. */ xengntshr_handle *xengntshr_open (xentoollog_logger *logger,unsigned open_flags);
@@ -165,11 +293,26 @@ xengntshr_handle *xengntshr_open(xentoollog_logger *logger,/* * Close a handle previously allocated with xengntshr_open(). * Never logs errors. +* +* Under normal circumstances (i.e. not in the child after a fork) +* xengntshr_unmap() should be used on all mappings allocated through +* a xengnttab_handle prior to closing the handle in order to free up +* resources associated with those mappings. +* +* xengntshr_close() is the only function which may be safely called +* on a xengntshr_handle in a child after a fork. xengntshr_unshare() +* must not be called under such circumstances. */ int xengntshr_close (xengntshr_handle *xgs); -/* -* Creates and shares pages with another domain. +/** +* Allocates and shares pages with another domain. +* +* On failure sets errno and returns NULL. No allocations will be made. +* +* This library only provides functionality for sharing memory +* allocated via this call, memory from elsewhere (malloc, mmap etc) +* cannot be shared here. * * @parm xgs a handle to an open grant sharing instance * @parm domid the domain to share memory with
@@ -181,7 +324,7 @@ int xengntshr_close(xengntshr_handle *xgs);void *xengntshr_share_pages (xengntshr_handle *xgs,uint32_t domid,int count,uint32_t *refs,int writable); -/* +/** * Creates and shares a page with another domain, with unmap notification. * * @parm xgs a handle to an open grant sharing instance
@@ -197,9 +340,13 @@ void *xengntshr_share_page_notify(xengntshr_handle *xgs, uint32_t domid, uint32_t *ref, int writable, uint32_t notify_offset, evtchn_port_t notify_port); -/* -* Unmaps the @count pages starting at @start_address, which were mapped by a -* call to xengntshr_share_*. Never logs. + +/** +* Unmaps the @count pages starting at @start_address, which were +* mapped by a call to xengntshr_share_*. Never logs. +* +* If the mapping was made using xengntshr_share_page_notify() with +* either notify_offset or notify_port then the peer will be notified. */ int xengntshr_unshare (xengntshr_handle *xgs,void *start_address,uint32_t count);
tools/libs/gnttab/linux.c +7 -5
@@ -132,12 +132,14 @@ void *osdep_gnttab_grant_map(xengnttab_handle *xgt,if (addr ==MAP_FAILED && errno ==EAGAIN ) {/* -* The grant hypercall can return EAGAIN if the granted page is -* swapped out. Since the paging daemon may be in the same domain, the -* hypercall cannot block without causing a deadlock. +* The grant hypercall can return EAGAIN if the granted page +* is swapped out. Since the paging daemon may be in the same +* domain, the hypercall cannot block without causing a +* deadlock. * -* Because there are no notificaitons when the page is swapped in, wait -* a bit before retrying, and hope that the page will arrive eventually. +* Because there are no notifications when the page is swapped +* in, wait a bit before retrying, and hope that the page will +* arrive eventually. */ usleep (1000 ); goto retry;
Signature · 1 line
2.1.4
PATCH v7 22/29 tools/libs/call: Update some log messages to not refer to xc.
In reply to Ian Campbell--- tools/libs/call/linux.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
tools/libs/call/linux.c +2 -2
@@ -94,7 +94,7 @@ void *osdep_alloc_pages(xencall_handle *xcall, size_t npages) p =mmap (NULL , size,PROT_READ |PROT_WRITE ,MAP_PRIVATE |MAP_ANONYMOUS |MAP_LOCKED ,-1 ,0 );if ( p ==MAP_FAILED ) { -PERROR ("xc_alloc_hypercall_buffer: mmap failed" ); +PERROR ("alloc_pages: mmap failed" );return NULL ; }
@@ -103,7 +103,7 @@ void *osdep_alloc_pages(xencall_handle *xcall, size_t npages) rc =madvise (p, npages *PAGE_SIZE ,MADV_DONTFORK );if ( rc <0 ) { -PERROR ("xc_alloc_hypercall_buffer: madvise failed" ); +PERROR ("alloc_pages: madvise failed" ); goto out; }
Signature · 1 line
2.1.4
PATCH v7 23/29 tools/libs/call: Describe return values and error semantics for xencall*
In reply to Ian CampbellThis behaviour has been confirmed by inspection on:
- Linux
- NetBSD & FreeBSD (NB: hcall->retval is the hypercall return value only for values >= 0. For negative values the underlying privcmd driver translates the value from Xen to {Net,Free}BSD errno space and returns it as the result of the ioctl, which becomes ret=-1/errno=EFOO in userspace)
- MiniOS (which takes care of errno in this library)
---
v7: Noted NetBSD behaviour
v6: New patch
--- tools/libs/call/include/xencall.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
tools/libs/call/include/xencall.h +15 -0
@@ -46,6 +46,21 @@ int xencall_close(xencall_handle *xcall);/* * Call hypercalls with varying numbers of arguments. +* +* On success the return value of the hypercall is the return value of +* the xencall function. On error these functions set errno and +* return -1. +* +* The errno values will be either: +* - The Xen hypercall error return (from xen/include/public/errno.h) +* translated into the corresponding local value for that POSIX error. +* - An errno value produced by the OS driver or the library +* implementation. Such values may be defined by POSIX or by the OS. +* +* Note that under some circumstances it will not be possible to tell +* whether an error came from Xen or from the OS/library. +* +* These functions never log. */ int xencall0 (xencall_handle *xcall,unsigned int op); int xencall1(xencall_handle *xcall, unsigned int op,
Signature · 7 lines
2.1.4 _______________________________________________ Xen-devel mailing list [email protected] http://lists.xen.org/xen-devel
Re: [PATCH XEN v7 23/29] tools/libs/call: Describe return values and error semantics for xencall*
El 16/12/15 a les 13.31, Ian Campbell ha escrit:
Quoted 10 lines
This behaviour has been confirmed by inspection on:
- Linux
- NetBSD & FreeBSD (NB:hcall->retvalis the hypercall return value only for values >= 0. For negative values the underlying privcmd driver translates the value from Xen to {Net,Free}BSD errno space and returns it as the result of the ioctl, which becomes ret=-1/errno=EFOO in userspace)
- MiniOS (which takes care of errno in this library)
Quoted 3 lines
Signed-off-by Ian Campbell <[email protected]>Acked-by Wei Liu <[email protected]>Acked-by Ian Jackson <[email protected]>
_______________________________________________
Xen-devel mailing list
[email protected]
http://lists.xen.org/xen-devel
PATCH v7 24/29 tools/libs/call: Avoid xc_memalign in netbsd and solaris backends
In reply to Ian CampbellThese are already arch specific, so just use the appropriate interfaces (as determined by looking at the xc_memalign backend).
--- tools/libs/call/netbsd.c | 4 ++-- tools/libs/call/solaris.c | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-)
tools/libs/call/netbsd.c +2 -2
@@ -74,8 +74,8 @@ void *osdep_alloc_hypercall_buffer(xencall_handle *xcall, size_t npages)size_t size = npages *XC_PAGE_SIZE ;void *p; - p =xc_memalign (xcall,XC_PAGE_SIZE , size); -if (!p) + ret =posix_memalign (&p,XC_PAGE_SIZE , size); +if ( ret !=0 || !p )return NULL ;if (mlock (p, size) <0 )
tools/libs/call/solaris.c +1 -1
@@ -71,7 +71,7 @@ int osdep_xencall_close(xencall_handle *xcall)void *osdep_alloc_hypercall_buffer (xencall_handle *xcall,size_t npages) { -return xc_memalign (xcall,XC_PAGE_SIZE , npages *XC_PAGE_SIZE ); +return memalign (XC_PAGE_SIZE , npages *XC_PAGE_SIZE ); } void osdep_free_hypercall_buffer(xencall_handle *xcall, void *ptr,
Signature · 1 line
2.1.4
PATCH v7 25/29 tools/libs/call: linux: touch newly allocated pages after madvise lockdown
In reply to Ian CampbellThis avoids a potential issue with a fork after allocation but before madvise.
---
v7: New, replacing "tools/libs/call: linux: avoid forking between mmap
and madvise".
--- tools/libs/call/linux.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-)
tools/libs/call/linux.c +13 -1
@@ -88,7 +88,7 @@ void *osdep_alloc_pages(xencall_handle *xcall, size_t npages) {size_t size = npages *PAGE_SIZE ;void *p; -int rc, saved_errno; +int rc, i, saved_errno;/* Address returned by mmap is page aligned. */ p =mmap (NULL , size,PROT_READ |PROT_WRITE ,MAP_PRIVATE |MAP_ANONYMOUS |MAP_LOCKED ,-1 ,0 );
@@ -107,6 +107,18 @@ void *osdep_alloc_pages(xencall_handle *xcall, size_t npages) goto out; } +/* +* Touch each page in turn to force them to be un-CoWed, in case a +* fork happened in another thread at an inopportune moment +* above. The madvise() will prevent any subsequent fork calls from +* causing the same problem. +*/ +for ( i =0 ; i < npages ; i++ ) + { +char *c = (char *)p + (i*PAGE_SIZE ); + *c =0 ; + } +return p; out:
Signature · 1 line
2.1.4
PATCH v7 26/29 tools/libs/{call, evtchn}: Document requirements around forking.
In reply to Ian CampbellMuch like for gnttab and foreignmemory xencall hypercall buffers need care.
Evtchn is a bit simpler (no magic mappings) but may not work from parent + child simultaneously, document "parent only" since it is consistent with the others.
---
v7: New
--- tools/libs/call/include/xencall.h | 28 ++++++++++++++++++++++++++++ tools/libs/evtchn/include/xenevtchn.h | 23 +++++++++++++++++++---- 2 files changed, 47 insertions(+), 4 deletions(-)
tools/libs/call/include/xencall.h +28 -0
@@ -36,11 +36,39 @@ typedef struct xencall_handle xencall_handle;/* * Return a handle onto the hypercall driver. Logs errors. +* * +* Note: After fork(2) a child process must not use any opened +* xencall handle inherited from their parent, nor access any +* hypercall argument buffers associated with that handle. +* +* The child must open a new handle if they want to interact with +* xencall. +* +* Calling exec(2) in a child will safely (and reliably) reclaim any +* resources which were allocated via a xencall_handle in the parent. +* +* A child which does not call exec(2) may safely call xencall_close() +* on a xencall_handle inherited from their parent. This will attempt +* to reclaim any resources associated with that handle. Note that in +* some implementations this reclamation may not be completely +* effective, in this case any affected resources remain allocated. +* +* Calling xencall_close() is the only safe operation on a +* xencall_handle which has been inherited. */ xencall_handle *xencall_open (xentoollog_logger *logger,unsigned open_flags);/* * Close a handle previously allocated with xencall_open(). +* +* Under normal circumstances (i.e. not in the child after a fork) any +* allocated hypercall argument buffers should be freed using the +* appropriate xencall_free_*() prior to closing the handle in order +* to free up resources associated with those mappings. +* +* This is the only function which may be safely called on a +* xencall_handle in a child after a fork. xencall_free_*() must not +* be called under such circumstances. */ int xencall_close (xencall_handle *xcall);
tools/libs/evtchn/include/xenevtchn.h +19 -4
@@ -45,10 +45,25 @@ typedef struct xentoollog_logger xentoollog_logger;* Return a handle to the event channel driver, or NULL on failure, in * which case errno will be set appropriately. * -* Note: -* After fork a child process must not use any opened evtchn -* handle inherited from their parent. They must open a new handle if -* they want to interact with evtchn. +* Note: After fork(2) a child process must not use any opened evtchn +* handle inherited from their parent, nor access any grant mapped +* areas associated with that handle. +* +* The child must open a new handle if they want to interact with +* evtchn. +* +* Calling exec(2) in a child will safely (and reliably) reclaim any +* allocated resources via a xenevtchn_handle in the parent. +* +* A child which does not call exec(2) may safely call +* xenevtchn_close() on a xenevtchn_handle inherited from their +* parent. This will attempt to reclaim any resources associated with +* that handle. Note that in some implementations this reclamation may +* not be completely effective, in this case any affected resources +* remain allocated. +* +* Calling xenevtchn_close() is the only safe operation on a +* xenevtchn_handle which has been inherited. */ /* Currently no flags are defined */ xenevtchn_handle *xenevtchn_open (xentoollog_logger *logger,unsigned open_flags);
Signature · 1 line
2.1.4
PATCH v7 27/29 tools/libs/*: Use O_CLOEXEC on Linux and FreeBSD
In reply to Ian CampbellIn some cases this replaces an FD_CLOEXEC dance, in others it is new.
Linux has had O_CLOEXEC since 2.6.23 (October 2007), so we can rely on it from Xen 4.7 I think. Some libc headers may still lack the definition, so we take care of that if need be.
All stable versions of FreeBSD support O_CLOEXEC (10.2, 9.3 and 8.4), and we assume the libc there does too.
Remove various comments about having to take responsibility for this (since really it is just hygiene, politeness, not a requirement) and the reasons for using O_CLOEXEC seem pretty straightforward.
Backends for other OSes are untouched.
---
v6: New
v7: New, replaces "tools/libs/call: Use O_CLOEXEC when opening
/dev/xen/privcmd on Linux"
--- tools/libs/call/freebsd.c | 30 ++++++++---------------------- tools/libs/call/linux.c | 38 +++++++++++--------------------------- tools/libs/evtchn/freebsd.c | 2 +- tools/libs/evtchn/linux.c | 6 +++++- tools/libs/foreignmemory/freebsd.c | 24 ++---------------------- tools/libs/foreignmemory/linux.c | 36 +++++++++--------------------------- tools/libs/gnttab/linux.c | 6 +++++- 7 files changed, 41 insertions(+), 101 deletions(-)
tools/libs/call/freebsd.c +8 -22
@@ -35,8 +35,14 @@int osdep_xencall_open (xencall_handle *xcall) { -int flags, saved_errno; -int fd =open (PRIVCMD_DEV ,O_RDWR ); +int saved_errno; +int fd =open (PRIVCMD_DEV ,O_RDWR |O_CLOEXEC ); + +/* +* This file descriptor is opaque to the caller, thus we are +* polite and try and ensure it doesn't propagate (ie leak) +* outside the process, by using O_CLOEXEC. +*/ if ( fd ==-1 ) {
@@ -45,26 +51,6 @@ int osdep_xencall_open(xencall_handle *xcall)return -1 ; } -/* -* Although we return the file handle as the 'xc handle' the API -* does not specify / guarentee that this integer is in fact -* a file handle. Thus we must take responsiblity to ensure -* it doesn't propagate (ie leak) outside the process. -*/ -if ( (flags =fcntl (fd,F_GETFD )) <0 ) - { -PERROR ("Could not get file handle flags" ); - goto error; - } - - flags |=FD_CLOEXEC ; - -if (fcntl (fd,F_SETFD , flags) <0 ) - { -PERROR ("Could not set file handle flags" ); - goto error; - } - xcall->fd = fd;return 0 ;
tools/libs/call/linux.c +11 -27
@@ -26,15 +26,23 @@#include "private.h" +#ifndef O_CLOEXEC +#define O_CLOEXEC 02000000 +#endif +int osdep_xencall_open (xencall_handle *xcall) { -int flags, saved_errno; -int fd =open ("/dev/xen/privcmd" ,O_RDWR );/* prefer this newer interface */ +int fd; + +/* +* Prefer the newer interface. +*/ + fd =open ("/dev/xen/privcmd" ,O_RDWR |O_CLOEXEC );if ( fd ==-1 && ( errno ==ENOENT || errno ==ENXIO || errno ==ENODEV )) {/* Fallback to /proc/xen/privcmd */ - fd =open ("/proc/xen/privcmd" ,O_RDWR ); + fd =open ("/proc/xen/privcmd" ,O_RDWR |O_CLOEXEC ); }if ( fd ==-1 )
@@ -43,32 +51,8 @@ int osdep_xencall_open(xencall_handle *xcall)return -1 ; } -/* Although we return the file handle as the 'xc handle' the API -does not specify / guarentee that this integer is in fact -a file handle. Thus we must take responsiblity to ensure -it doesn't propagate (ie leak) outside the process */ -if ( (flags =fcntl (fd,F_GETFD )) <0 ) - { -PERROR ("Could not get file handle flags" ); - goto error; - } - - flags |=FD_CLOEXEC ; - -if (fcntl (fd,F_SETFD , flags) <0 ) - { -PERROR ("Could not set file handle flags" ); - goto error; - } - xcall->fd = fd;return 0 ; - - error: - saved_errno = errno; -close (fd); - errno = saved_errno; -return -1 ; }int osdep_xencall_close (xencall_handle *xcall)
tools/libs/evtchn/freebsd.c +1 -1
@@ -32,7 +32,7 @@int osdep_evtchn_open (xenevtchn_handle *xce) { -int fd =open (EVTCHN_DEV ,O_RDWR ); +int fd =open (EVTCHN_DEV ,O_RDWR |O_CLOEXEC );if ( fd ==-1 )return -1 ; xce->fd = fd;
tools/libs/evtchn/linux.c +5 -1
@@ -28,9 +28,13 @@#include "private.h" +#ifndef O_CLOEXEC +#define O_CLOEXEC 02000000 +#endif +int osdep_evtchn_open (xenevtchn_handle *xce) { -int fd =open ("/dev/xen/evtchn" ,O_RDWR ); +int fd =open ("/dev/xen/evtchn" ,O_RDWR |O_CLOEXEC );if ( fd ==-1 )return -1 ; xce->fd = fd;
tools/libs/foreignmemory/freebsd.c +2 -22
@@ -33,8 +33,8 @@int osdep_xenforeignmemory_open (xenforeignmemory_handle *fmem) { -int flags, saved_errno; -int fd =open (PRIVCMD_DEV ,O_RDWR ); +int saved_errno; +int fd =open (PRIVCMD_DEV ,O_RDWR |O_CLOEXEC );if ( fd ==-1 ) {
@@ -43,26 +43,6 @@ int osdep_xenforeignmemory_open(xenforeignmemory_handle *fmem)return -1 ; } -/* -* Although we return the file handle as the 'xc handle' the API -* does not specify / guarentee that this integer is in fact -* a file handle. Thus we must take responsiblity to ensure -* it doesn't propagate (ie leak) outside the process. -*/ -if ( (flags =fcntl (fd,F_GETFD )) <0 ) - { -PERROR ("Could not get file handle flags" ); - goto error; - } - - flags |=FD_CLOEXEC ; - -if (fcntl (fd,F_SETFD , flags) <0 ) - { -PERROR ("Could not set file handle flags" ); - goto error; - } - fmem->fd = fd;return 0 ;
tools/libs/foreignmemory/linux.c +9 -27
@@ -30,15 +30,21 @@#define ROUNDUP (_x,_w) (((unsigned long)(_x)+(1UL<<(_w))-1) & ~((1UL<<(_w))-1)) +#ifndef O_CLOEXEC +#define O_CLOEXEC 02000000 +#endif +int osdep_xenforeignmemory_open (xenforeignmemory_handle *fmem) { -int flags, saved_errno; -int fd =open ("/dev/xen/privcmd" ,O_RDWR );/* prefer this newer interface */ +int fd; + +/* prefer this newer interface */ + fd =open ("/dev/xen/privcmd" ,O_RDWR |O_CLOEXEC );if ( fd ==-1 && ( errno ==ENOENT || errno ==ENXIO || errno ==ENODEV )) {/* Fallback to /proc/xen/privcmd */ - fd =open ("/proc/xen/privcmd" ,O_RDWR ); + fd =open ("/proc/xen/privcmd" ,O_RDWR |O_CLOEXEC ); }if ( fd ==-1 )
@@ -47,32 +53,8 @@ int osdep_xenforeignmemory_open(xenforeignmemory_handle *fmem)return -1 ; } -/* Although we return the file handle as the 'xc handle' the API -does not specify / guarentee that this integer is in fact -a file handle. Thus we must take responsiblity to ensure -it doesn't propagate (ie leak) outside the process */ -if ( (flags =fcntl (fd,F_GETFD )) <0 ) - { -PERROR ("Could not get file handle flags" ); - goto error; - } - - flags |=FD_CLOEXEC ; - -if (fcntl (fd,F_SETFD , flags) <0 ) - { -PERROR ("Could not set file handle flags" ); - goto error; - } - fmem->fd = fd;return 0 ; - - error: - saved_errno = errno; -close (fd); - errno = saved_errno; -return -1 ; }int osdep_xenforeignmemory_close (xenforeignmemory_handle *fmem)
tools/libs/gnttab/linux.c +5 -1
@@ -43,9 +43,13 @@#define PAGE_SIZE (1UL << PAGE_SHIFT)#define PAGE_MASK (~(PAGE_SIZE-1)) +#ifndef O_CLOEXEC +#define O_CLOEXEC 02000000 +#endif +int osdep_gnttab_open (xengnttab_handle *xgt) { -int fd =open (DEVXEN "gntdev" ,O_RDWR ); +int fd =open (DEVXEN "gntdev" ,O_RDWR |O_CLOEXEC );if ( fd ==-1 )return -1 ; xgt->fd = fd;
Signature · 1 line
2.1.4
Re: [PATCH XEN v7 27/29] tools/libs/*: Use O_CLOEXEC on Linux and FreeBSD
El 16/12/15 a les 13.31, Ian Campbell ha escrit:
Quoted 8 lines
In some cases this replaces an
FD_CLOEXECdance, in others it is new.Linux has had
O_CLOEXECsince 2.6.23 (October 2007), so we can rely on it from Xen 4.7 I think. Some libc headers may still lack the definition, so we take care of that if need be.All stable versions of FreeBSD support
O_CLOEXEC(10.2, 9.3 and 8.4), and we assume the libc there does too.
Yes, the FreeBSD libc certainly does, since the kernel and libc are tied together in the BSD world (ie: they live in the same repository).
Quoted 8 lines
Remove various comments about having to take responsibility for this (since really it is just hygiene, politeness, not a requirement) and the reasons for using
O_CLOEXECseem pretty straightforward.Backends for other OSes are untouched.
Signed-off-by Ian Campbell <[email protected]>
For the FreeBSD side:
Re: [PATCH XEN v7 27/29] tools/libs/*: Use O_CLOEXEC on Linux and FreeBSD
In reply to Ian Campbelltools/libs/call/freebsd.c line 39
Quoted 11 lines
Quoted 1 line
Quoted 1 line · On 16.12.15 at 13:31, <[email protected]> wrote:
tools/libs/call/freebsd.c +2
-2@@ -35,8 +35,14 @@int osdep_xencall_open (xencall_handle *xcall) { -int flags, saved_errno; -int fd =open (PRIVCMD_DEV ,O_RDWR ); +int saved_errno; +int fd =open (PRIVCMD_DEV ,O_RDWR |O_CLOEXEC );
No compatibility define needed for FreeBSD?
tools/libs/call/linux.c line 31
Quoted 9 lines
tools/libs/call/linux.c +3
-0@@ -26,15 +26,23 @@#include "private.h" +#ifndef O_CLOEXEC +#define O_CLOEXEC 02000000 +#endif
Is that a good idea? Wouldn't you better define to zero if building on an old glibc, assuming you'd then also run on an old kernel?
Jan
Re: [PATCH XEN v7 27/29] tools/libs/*: Use O_CLOEXEC on Linux and FreeBSD
Quoted 13 lines · Jan Beulich
Quoted 11 lines
Quoted 1 line
Quoted 1 line · On 16.12.15 at 13:31, <[email protected]> wrote:
tools/libs/call/freebsd.c +0
-0@@ -35,8 +35,14 @@
intosdep_xencall_open(xencall_handle *xcall){
- int flags,saved_errno;
- int fd =open(PRIVCMD_DEV, O_RDWR);
+ intsaved_errno;
+ int fd =open(PRIVCMD_DEV, O_RDWR|O_CLOEXEC);No compatibility define needed for FreeBSD?
No, the kernel and libc are more tightly integrated there.
Quoted 4 lines
Quoted 4 lines
tools/libs/call/linux.c +0
-0@@ -26,15 +26,23 @@
Quoted 8 lines
tools/libs/call/linux.c line 31
Quoted 5 lines
#include "
private.h"tools/libs/call/linux.c +3
-0+#ifndef O_CLOEXEC +#define O_CLOEXEC 02000000 +#endif Is that a good idea? Wouldn't you better define to zero if building on an old glibc, assuming you'd then also run on an old kernel?
Good point, I was only considering the old userspace but with newer kernel case. Since O_CLOEXEC was implemented in 2.6.23 I was expecting we could just rely on its presence, but you mentioned that you sometimes used newers kernels with older glibcs.
In the end I don't think I mind either way.
Ian.
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Xen-devel mailing list
[email protected]
http://lists.xen.org/xen-devel
Re: [PATCH XEN v7 27/29] tools/libs/*: Use O_CLOEXEC on Linux and FreeBSD
Quoted 16 lines
Quoted 1 line
Quoted 1 line · On 16.12.15 at 15:04, <[email protected]> wrote:
Quoted 5 lines · Jan Beulich
Quoted 5 lines
Quoted 1 line
Quoted 1 line · On 16.12.15 at 13:31, <[email protected]> wrote:
tools/libs/call/linux.c +0
-0@@ -26,15 +26,23 @@Quoted 8 lines
tools/libs/call/linux.c line 31
Quoted 5 lines
tools/libs/call/linux.c +3
-0#include "private.h" +#ifndef O_CLOEXEC +#define O_CLOEXEC 02000000 +#endif Is that a good idea? Wouldn't you better define to zero if building on an old glibc, assuming you'd then also run on an old kernel?
Quoted 4 lines
Good point, I was only considering the old userspace but with newer kernel case. Since
O_CLOEXECwas implemented in 2.6.23 I was expecting we could just rely on its presence, but you mentioned that you sometimes used newers kernels with older glibcs.
I do (and specifically don't run old kernels under newer glibc), but along with the old kernel consideration it is also unclear to me whether we can rely on old glibc to not barf on bits they don't know, irrespective of whether the kernel knows. I.e. I still think that - unless you want to probe for support at runtime, or also evaluate the kernel version of the kernel headers installed - using zero here would be the most compatible approach.
Jan
Re: [PATCH XEN v7 27/29] tools/libs/*: Use O_CLOEXEC on Linux and FreeBSD
Quoted 25 lines · Jan Beulich
Quoted 17 lines
Quoted 1 line
Quoted 1 line · On 16.12.15 at 15:04, <[email protected]> wrote:
Quoted 14 lines · Jan Beulich
tools/libs/call/linux.c line 31
Quoted 10 lines
Quoted 1 line
Quoted 1 line · On 16.12.15 at 13:31, <[email protected]> wrote:
tools/libs/call/linux.c +0
-0@@ -26,15 +26,23 @@
#include "private.h"tools/libs/call/linux.c +3
-0+#ifndef O_CLOEXEC +#define O_CLOEXEC 02000000 +#endif Is that a good idea? Wouldn't you better define to zero if building on
an old glibc, assuming you'd then also run on an old kernel?Quoted 7 lines
Good point, I was only considering the old userspace but with newer kernel
case. SinceO_CLOEXECwas implemented in 2.6.23 I was expecting we could
just rely on its presence, but you mentioned that you sometimes used newers
kernels with older glibcs.
Quoted 7 lines
I do (and specifically don't run old kernels under newer glibc), but along with the old kernel consideration it is also unclear to me whether we can rely on old glibc to not barf on bits they don't know, irrespective of whether the kernel knows. I.e. I still think that - unless you want to probe for support at runtime, or also evaluate the kernel version of the kernel headers installed - using zero here would be the most compatible approach.
OK, I'll make that change next time.
Ian.
_______________________________________________
Xen-devel mailing list
[email protected]
http://lists.xen.org/xen-devel
PATCH v7 28/29 tools: Update CFLAGS for qemu-xen to allow it to use new libraries
In reply to Ian CampbellThis means adding -L for libxen{evtchn,gnttab,foreignmemory} so that it can link them directly (rather than using the libxenctrl compat layer exposed via -rpath-link). Also add -I for libxenforeignmemory.
--- tools/Makefile | 4 ++++ 1 file changed, 4 insertions(+)
tools/Makefile +4 -0
@@ -255,12 +255,16 @@ subdir-all-qemu-xen-dir: qemu-xen-dir-find -I$(XEN_ROOT)/tools/libs/toollog/include \ -I$(XEN_ROOT)/tools/libs/evtchn/include \ -I$(XEN_ROOT)/tools/libs/gnttab/include \ + -I$(XEN_ROOT)/tools/libs/foreignmemory/include \ -I$(XEN_ROOT)/tools/libxc/include \ -I$(XEN_ROOT)/tools/xenstore/include \ -I$(XEN_ROOT)/tools/xenstore/compat/include \ $(EXTRA_CFLAGS_QEMU_XEN)" \ --extra-ldflags="-L$(XEN_ROOT)/tools/libxc \ -L$(XEN_ROOT)/tools/xenstore \ + -L$(XEN_ROOT)/tools/libs/evtchn \ + -L$(XEN_ROOT)/tools/libs/gnttab \ + -L$(XEN_ROOT)/tools/libs/foreignmemory \ -Wl,-rpath-link=$(XEN_ROOT)/tools/libs/toollog \ -Wl,-rpath-link=$(XEN_ROOT)/tools/libs/evtchn \ -Wl,-rpath-link=$(XEN_ROOT)/tools/libs/gnttab \
Signature · 1 line
2.1.4
PATCH v7 29/29 HACK: Update Config.mk to pull all the right bits from my xenbits trees
In reply to Ian Campbellv4: Config.mk instead of .config
--- Config.mk | 28 +++++++++++++--------------- 1 file changed, 13 insertions(+), 15 deletions(-)
Config.mk +13 -15
@@ -1,5 +1,3 @@ -# -*- mode: Makefile; -*- - ifeq ($(filter /%,$(XEN_ROOT)),) $(error XEN_ROOT must be absolute) endif
@@ -242,22 +240,22 @@ endif ifeq ($(GIT_HTTP),y) OVMF_UPSTREAM_URL ?= http://xenbits.xen.org/git-http/ovmf.git -QEMU_UPSTREAM_URL ?= http://xenbits.xen.org/git-http/qemu-xen.git -QEMU_TRADITIONAL_URL ?= http://xenbits.xen.org/git-http/qemu-xen-traditional.git +QEMU_UPSTREAM_URL ?= http://xenbits.xen.org/git-http/people/ianc/libxenctrl-split/qemu-xen.git +QEMU_TRADITIONAL_URL ?= http://xenbits.xen.org/git-http/people/ianc/libxenctrl-split/qemu-xen-traditional.git SEABIOS_UPSTREAM_URL ?= http://xenbits.xen.org/git-http/seabios.git -MINIOS_UPSTREAM_URL ?= http://xenbits.xen.org/git-http/mini-os.git +MINIOS_UPSTREAM_URL ?= http://xenbits.xen.org/git-http/people/ianc/libxenctrl-split/mini-os.git else OVMF_UPSTREAM_URL ?= git://xenbits.xen.org/ovmf.git -QEMU_UPSTREAM_URL ?= git://xenbits.xen.org/qemu-xen.git -QEMU_TRADITIONAL_URL ?= git://xenbits.xen.org/qemu-xen-traditional.git +QEMU_UPSTREAM_URL ?= git://xenbits.xen.org/people/ianc/libxenctrl-split/qemu-xen.git +QEMU_TRADITIONAL_URL ?= git://xenbits.xen.org/people/ianc/libxenctrl-split/qemu-xen-traditional.git SEABIOS_UPSTREAM_URL ?= git://xenbits.xen.org/seabios.git -MINIOS_UPSTREAM_URL ?= git://xenbits.xen.org/mini-os.git +MINIOS_UPSTREAM_URL ?= git://xenbits.xen.org/people/ianc/libxenctrl-split/mini-os.git endif OVMF_UPSTREAM_REVISION ?= 52a99493cce88a9d4ec8a02d7f1bd1a1001ce60d -QEMU_UPSTREAM_REVISION ?= master -MINIOS_UPSTREAM_REVISION ?= d25773c8afa2f4dbbb466116daeb60159ddd22bd -# Thu Dec 3 11:23:25 2015 +0000 -# mini-os: Include libxentoollog with libxc +QEMU_UPSTREAM_REVISION ?= origin/v7 +MINIOS_UPSTREAM_REVISION ?= origin/v7 +# Mon Nov 23 16:34:31 2015 +0000 +# Add a .gitignore SEABIOS_UPSTREAM_REVISION ?= rel-1.9.0 # Tue Nov 17 09:18:44 2015 -0500
@@ -266,9 +264,9 @@ SEABIOS_UPSTREAM_REVISION ?= rel-1.9.0 ETHERBOOT_NICS ?= rtl8139 8086100e -QEMU_TRADITIONAL_REVISION ?= 9fad9ed285835caef64bb8dab352e287ad8538c2 -# Thu Dec 3 11:23:16 2015 +0000 -# qemu-xen-traditional: Use xentoollog as a separate library +QEMU_TRADITIONAL_REVISION ?= origin/v7 +# Tue Mar 11 10:19:23 2014 +0000 +# block-vvfat: fix resource leaks in read_directory() # Specify which qemu-dm to use. This may be `ioemu' to use the old # Mercurial in-tree version, or a local directory, or a git URL.
Signature · 1 line
2.1.4
PATCH v7 1/1 tools/libs/*: Introduce APIs to restrict handles to a specific domain.
In reply to Ian CampbellThese are intended to allow user space processes (in particular QEMU) to lock down all the handles at start of day and then drop the privileges which would allow them to open any new unrestricted handles (e.g. setuid or similar). This will reduce the privileges which taking over such a process would gain an attacker wrt other domains in the system.
These are currently unimplemented on all platforms, however the API semantics are defined as the basis for discussion, and so that consumers can rely on this interface always having been present rather than requiring compile time API checks.
It is expected that these will be implemented by adding new ioctl calls on the underlying driver and that the restrictions will be enforced at the kernel interface layer (most likely by the kernel itself).
For evtchn, foreignmemory, gnttab and gntshr this is hopefully reasonably straightforward.
For call it is not so clear cut. Clearly the kernel cannot enforce these restrictions for hypercalls which are not stable (domctl et al) so they can never be on the whitelist. It may also be that potential users would like to restrict the handle further than just a given target domain, i.e. to a specific set of functionality (e.g. "things a device model might reasonably do"). I think we will also need some way to discover whether a given set of interfaces is available to a restricted handle, in order to support the addition of new functionality.
Notes:
- On many (all?) platforms libxencall and libxenforeignmemory are implemented by the same underlying privcmd driver. The platform level ioctl interface should support restricting the handle to only one or the other.
- On platforms with multiple privilege mapping ioctl variants should consider only allowing the newest/currently preferred one on a restricted handle. e.g. on Linux this would allow IOCTL_PRIVCMD_MMAPBATCH_V2 but not IOCTL_PRIVCMD_MMAPBATCH. (Of course any subsequently introduced _V3 would be subject to compatibility concerns)
---
v8: New
This applies on top of the Xen portion of "Begin to disentangle libxenctrl and provide some stable libraries", v7, plus a couple of minor fixes which will be in v8. All of this can be found in the "vwip" branch of the tree referenced by that series atgit://xenbits.xen.org/people/ianc/libxenctrl-split/xen.git.
--- tools/libs/call/core.c | 7 +++ tools/libs/call/include/xencall.h | 34 +++++++++++++++ tools/libs/call/libxencall.map | 2 + tools/libs/evtchn/core.c | 7 +++ tools/libs/evtchn/include/xenevtchn.h | 35 +++++++++++++++ tools/libs/evtchn/libxenevtchn.map | 2 + tools/libs/foreignmemory/core.c | 7 +++ .../libs/foreignmemory/include/xenforeignmemory.h | 22 ++++++++++ tools/libs/foreignmemory/libxenforeignmemory.map | 3 ++ tools/libs/gnttab/gntshr_core.c | 8 ++++ tools/libs/gnttab/gnttab_core.c | 7 +++ tools/libs/gnttab/include/xengnttab.h | 50 ++++++++++++++++++++++ tools/libs/gnttab/libxengnttab.map | 8 +++- 13 files changed, 190 insertions(+), 2 deletions(-)
tools/libs/call/core.c +7 -0
@@ -14,6 +14,7 @@*/ #include <stdlib.h> +#include <errno.h> #include "private.h"
@@ -70,6 +71,12 @@ int xencall_close(xencall_handle *xcall)return rc; } +int xencall_restrict_target (xencall_handle *xcall,uint32_t domid) +{ + errno =ENOSYS ; +return -1 ; +} +int xencall0 (xencall_handle *xcall,unsigned int op) {privcmd_hypercall_t call = {
tools/libs/call/include/xencall.h +34 -0
@@ -73,6 +73,40 @@ xencall_handle *xencall_open(xentoollog_logger *logger, unsigned open_flags);int xencall_close (xencall_handle *xcall);/* +* Attempt to restrict the given xcall handle to only be able to +* target the given domain. +* +* On success returns 0, after which only hypercalls which are on a +* platform specific whitelist can be called and the arguments will be +* audited by the platform to ensure that the target domain is +* domid. +* +* Subsequent attempts to call any hypercall not on the platform +* specific whitelist will return -1 setting errno to ENOSYS. +* +* Subsequent attempts to call any hypercall on the platform specific +* whitelist with any other target domain return return -1 setting +* errno to EPERM. +* +* These restrictions will be implemented by the platform in a way +* which cannot be circumvented by a userspace process. Further +* privilege drops (such as using setuid(2) etc) may also be required +* to prevent a compromised process from simply opening a second +* handle +* +* XXX which hypercalls are restricted, per platform list, do we need +* a way to probe? Do we want to be able to restrict to particular +* subsets of whitelisted hypercalls? +* +* On failure returns -1 and sets errno: +* ENOSYS: The platform is not able to support restricting the +* target domain. +* Other: The platform should be able to support restricting the +* target domain, but was unable to do so. +*/ +int xencall_restrict_target (xencall_handle *xcall,uint32_t domid); + +/* * Call hypercalls with varying numbers of arguments. * * On success the return value of the hypercall is the return value of
tools/libs/call/libxencall.map +2 -0
@@ -3,6 +3,8 @@ VERS_1.0 { xencall_open; xencall_close; + xencall_restrict_target; + xencall0; xencall1; xencall2;
tools/libs/evtchn/core.c +7 -0
@@ -15,6 +15,7 @@#include <unistd.h> #include <stdlib.h> +#include <errno.h> #include "private.h"
@@ -61,6 +62,12 @@ int xenevtchn_close(xenevtchn_handle *xce)return rc; } +int xenevtchn_restrict_target (xenevtchn_handle *xce,uint32_t domid) +{ + errno =ENOSYS ; +return -1 ; +} +/* * Local variables: * mode: C
tools/libs/evtchn/include/xenevtchn.h +35 -0
@@ -74,6 +74,41 @@ xenevtchn_handle *xenevtchn_open(xentoollog_logger *logger, unsigned open_flags)int xenevtchn_close (xenevtchn_handle *xce);/* +* Attempt to restrict the given evtchn handle to only operate on the +* given domain. +* +* On success returns 0, after which: +* +* - Any operations which take a peer domain as an argument can only +* be called with the specified target domain. Subsequent attempts +* to call any such interface with another domain will return -1 +* setting errno to EPERM. +* +* - Any operations which take an evtchn_port_t are not restricted +* other than by the requirement to have previously bound that +* evtchn to the handle. Therefore users of the restrict interface +* should take care not to bind any event channels relating to other +* domains prior to enforcing the restriction. The restrictions on +* xenevtchn_bind_* suffice to prevent any new such bindings. +* +* - xenevtchn_bind_virq is not permitted after and will return -1 +* setting errno EPERM. +* +* These restrictions will be implemented by the platform in a way +* which cannot be circumvented by a userspace process. Further +* privilege drops (such as using setuid(2) etc) may also be required +* to prevent a compromised process from simply opening a second +* handle +* +* On failure returns -1 and sets errno: +* ENOSYS: The platform is not able to support restricting the +* target domain. +* Other: The platform should be able to support restricting the +* target domain, but was unable to do so. +*/ +int xenevtchn_restrict_target (xenevtchn_handle *xce,uint32_t domid); + +/* * Return an fd that can be select()ed on. * * Note that due to bugs, setting this fd to non blocking may not
tools/libs/evtchn/libxenevtchn.map +2 -0
@@ -3,6 +3,8 @@ VERS_1.0 { xenevtchn_open; xenevtchn_close; + xenevtchn_restrict_target; + xenevtchn_fd; xenevtchn_bind_unbound_port;
tools/libs/foreignmemory/core.c +7 -0
@@ -62,6 +62,13 @@ int xenforeignmemory_close(xenforeignmemory_handle *fmem)return rc; } +int xenforeignmemory_restrict_target (xenforeignmemory_handle *fmem, +uint32_t domid) +{ + errno =ENOSYS ; +return -1 ; +} + void *xenforeignmemory_map(xenforeignmemory_handle *fmem, uint32_t dom, int prot, size_t num,
tools/libs/foreignmemory/include/xenforeignmemory.h +22 -0
@@ -74,6 +74,28 @@ xenforeignmemory_handle *xenforeignmemory_open(xentoollog_logger *logger,int xenforeignmemory_close (xenforeignmemory_handle *fmem);/* +* Attempt to restrict the given handle to only target the given +* domain. +* +* On success returns 0, after which calls to xenforeignmemory_map +* which pass a domain other than the given domain will return -1 +* setting errno to EPERM. +* +* This restriction will be implemented by the platform in a way which +* cannot be circumvented by a userspace process. Further privilege +* drops (such as using setuid(2) etc) may also be required to prevent +* a compromised process from simply opening a second handle +* +* On failure returns -1 and sets errno: +* ENOSYS: The platform is not able to support restricting the +* target domain. +* Other: The platform should be able to support restricting the +* target domain, but was unable to do so. +*/ +int xenforeignmemory_restrict_target (xenforeignmemory_handle *fmem, +uint32_t domid); + +/* * Maps a range within one domain to a local address range. Mappings * must be unmapped with xenforeignmemory_unmap and should follow the * same rules as mmap regarding page alignment.
tools/libs/foreignmemory/libxenforeignmemory.map +3 -0
@@ -2,6 +2,9 @@ VERS_1.0 { global: xenforeignmemory_open; xenforeignmemory_close; + + xenforeignmemory_restrict_target; + xenforeignmemory_map; xenforeignmemory_unmap; local: *; /* Do not expose anything by default */
tools/libs/gnttab/gntshr_core.c +8 -0
@@ -19,6 +19,7 @@*/ #include <stdlib.h> +#include <errno.h> #include "private.h"
@@ -64,6 +65,13 @@ int xengntshr_close(xengntshr_handle *xgs)free (xgs);return rc; } + +int xengntshr_restrict_target (xengntshr_handle *xgs,uint32_t domid) +{ + errno =ENOSYS ; +return -1 ; +} +void *xengntshr_share_pages (xengntshr_handle *xcg,uint32_t domid,int count,uint32_t *refs,int writable) {
tools/libs/gnttab/gnttab_core.c +7 -0
@@ -19,6 +19,7 @@*/ #include <stdlib.h> +#include <errno.h> #include "private.h"
@@ -65,6 +66,12 @@ int xengnttab_close(xengnttab_handle *xgt)return rc; } +int xengnttab_restrict_target (xengnttab_handle *xgt,uint32_t domid) +{ + errno =ENOSYS ; +return -1 ; +} +int xengnttab_set_max_grants (xengnttab_handle *xgt,uint32_t count) {return osdep_gnttab_set_max_grants (xgt, count);
tools/libs/gnttab/include/xengnttab.h +50 -0
62 lines not on this page · raw message
tools/libs/gnttab/libxengnttab.map +6 -2
@@ -3,6 +3,8 @@ VERS_1.0 { xengnttab_open; xengnttab_close; + xengnttab_restrict_target; + xengnttab_set_max_grants; xengnttab_map_domain_grant_refs;
@@ -11,10 +13,12 @@ VERS_1.0 { xengnttab_map_grant_refs; xengnttab_unmap; - + xengntshr_open; xengntshr_close; - + + xengntshr_restrict_target; + xengntshr_share_page_notify; xengntshr_share_pages;
Signature · 1 line
2.1.4
v7 cover Begin to disentangle libxenctrl and provide some stable libraries
In reply to Ian CampbellWe intend to stabilise some parts of the libxenctrl interface by splitting out some functionality into separate stable libraries.
This is the qemu-xen part of the first phase of that change.
This mail is (or is intended to be) a reply to a "0/<VARIOUS>" super-intro mail covering all of the related patch series and which contains more details.
Ian Campbell (8):
xen_console: correctly cleanup primary console on teardown.
xen: Switch to libxenevtchn interface for compat shims.
xen: Switch to libxengnttab interface for compat shims.
xen: Switch uses of xc_map_foreign_range into xc_map_foreign_pages
xen: Switch uses of xc_map_foreign_{pages,bulk} to use
libxenforeignmemory API.
xen: Use stable library interfaces when they are available.
xen: domainbuild: reopen libxenctrl interface after forking for domain
watcher.
xen: make it possible to build without the Xen PV domain builder
configure | 57 ++++++++++++++++- hw/block/xen_disk.c | 38 +++++------ hw/char/xen_console.c | 19 +++--- hw/display/xenfb.c | 28 +++++---- hw/net/xen_nic.c | 18 +++--- hw/xen/xen_backend.c | 44 ++++++------- hw/xenpv/Makefile.objs | 4 +- hw/xenpv/xen_domainbuild.c | 9 ++- hw/xenpv/xen_machine_pv.c | 15 +++-- include/hw/xen/xen_backend.h | 5 +- include/hw/xen/xen_common.h | 147 ++++++++++++++++++++++++++++++++++--------- xen-common.c | 6 ++ xen-hvm.c | 39 ++++++------ xen-mapcache.c | 6 +- 14 files changed, 299 insertions(+), 136 deletions(-)
Signature · 1 line
2.1.4
v7 cover Begin to disentangle libxenctrl and provide some stable libraries
In reply to Ian CampbellWe intend to stabilise some parts of the libxenctrl interface by splitting out some functionality into separate stable libraries.
This is the qemu-xen part of the first phase of that change.
This mail is (or is intended to be) a reply to a "0/<VARIOUS>" super-intro mail covering all of the related patch series and which contains more details.
Ian Campbell (8):
xen_console: correctly cleanup primary console on teardown.
xen: Switch to libxenevtchn interface for compat shims.
xen: Switch to libxengnttab interface for compat shims.
xen: Switch uses of xc_map_foreign_range into xc_map_foreign_pages
xen: Switch uses of xc_map_foreign_{pages,bulk} to use
libxenforeignmemory API.
xen: Use stable library interfaces when they are available.
xen: domainbuild: reopen libxenctrl interface after forking for domain
watcher.
xen: make it possible to build without the Xen PV domain builder
configure | 57 ++++++++++++++++- hw/block/xen_disk.c | 38 +++++------ hw/char/xen_console.c | 19 +++--- hw/display/xenfb.c | 28 +++++---- hw/net/xen_nic.c | 18 +++--- hw/xen/xen_backend.c | 44 ++++++------- hw/xenpv/Makefile.objs | 4 +- hw/xenpv/xen_domainbuild.c | 9 ++- hw/xenpv/xen_machine_pv.c | 15 +++-- include/hw/xen/xen_backend.h | 5 +- include/hw/xen/xen_common.h | 147 ++++++++++++++++++++++++++++++++++--------- xen-common.c | 6 ++ xen-hvm.c | 39 ++++++------ xen-mapcache.c | 6 +- 14 files changed, 299 insertions(+), 136 deletions(-)
Signature · 1 line
2.1.4
PATCH v7 1/8 xen_console: correctly cleanup primary console on teardown.
All of the work in con_disconnect applies to the primary console case (when xendev->dev is NULL). Therefore remove the early check and bail and allow it to fall through. All of the existing code is correctly conditional already.
The ->dev and ->gnttabdev handles are either both set or neither. For consistency with con_initialise() with to the former here too.
With this con_initialise and con_disconnect now mirror each other.
Fix up a hard tab in the function while editing.
---
v4: New patch based on feedback to "xen: Switch uses of xc_map_foreign_bulk to use libxenforeignmemory API."
--- hw/char/xen_console.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-)
hw/char/xen_console.c +2 -5
@@ -265,9 +265,6 @@ static void con_disconnect(struct XenDevice *xendev) { struct XenConsole *con = container_of(xendev, struct XenConsole, xendev); -if (!xendev->dev) { -return ; - }if (con->chr) {qemu_chr_add_handlers (con->chr,NULL ,NULL ,NULL ,NULL );qemu_chr_fe_release (con->chr);
@@ -275,12 +272,12 @@ static void con_disconnect(struct XenDevice *xendev)xen_be_unbind_evtchn (&con->xendev);if (con->sring) { -if (!xendev->gnttabdev) { +if (!xendev->dev) {munmap (con->sring,XC_PAGE_SIZE ); }else {xc_gnttab_munmap (xendev->gnttabdev, con->sring,1 ); } - con->sring =NULL ; + con->sring =NULL ; } }
Signature · 1 line
2.1.4
PATCH v7 2/8 xen: Switch to libxenevtchn interface for compat shims.
In reply to Ian CampbellIn Xen 4.7 we are refactoring parts libxenctrl into a number of separate libraries which will provide backward and forward API and ABI compatiblity.
One such library will be libxenevtchn which provides access to event channels.
In preparation for this switch the compatibility layer in xen_common.h (which support building with older versions of Xen) to use what will be the new library API. This means that the evtchn shim will disappear for versions of Xen which include libxenevtchn.
To simplify things for the <= 4.0.0 support we wrap the int fd in a malloc(sizeof int) such that the handle is always a pointer. This leads to less typedef headaches and the need for XC_HANDLER_INITIAL_VALUE etc for these interfaces.
Note that this patch does not add any support for actually using libxenevtchn, it just adjusts the existing shims.
Note that xc_evtchn_alloc_unbound functionality remains in libxenctrl, since that functionality is not exposed by /dev/xen/evtchn.
---
v4: Ran checkpatch, fixed all errors
Allocate correct size for handle (i.e. not size of the ptr)
--- hw/xen/xen_backend.c | 31 ++++++++++++++++--------------- include/hw/xen/xen_backend.h | 2 +- include/hw/xen/xen_common.h | 44 ++++++++++++++++++++++++++++++++++---------- xen-hvm.c | 25 +++++++++++++------------ 4 files changed, 64 insertions(+), 38 deletions(-)
hw/xen/xen_backend.c +16 -15
@@ -243,19 +243,19 @@ static struct XenDevice *xen_be_get_xendev(const char *type, int dom, int dev, xendev->debug = debug; xendev->local_port =-1 ; - xendev->evtchndev =xen_xc_evtchn_open (NULL ,0 ); -if (xendev->evtchndev ==XC_HANDLER_INITIAL_VALUE ) { + xendev->evtchndev =xenevtchn_open (NULL ,0 ); +if (xendev->evtchndev ==NULL ) {xen_be_printf (NULL ,0 ,"can't open evtchn device\n" );g_free (xendev);return NULL ; } -fcntl (xc_evtchn_fd (xendev->evtchndev),F_SETFD ,FD_CLOEXEC ); +fcntl (xenevtchn_fd (xendev->evtchndev),F_SETFD ,FD_CLOEXEC );if (ops->flags &DEVOPS_FLAG_NEED_GNTDEV ) { xendev->gnttabdev =xen_xc_gnttab_open (NULL ,0 );if (xendev->gnttabdev ==XC_HANDLER_INITIAL_VALUE ) {xen_be_printf (NULL ,0 ,"can't open gnttab device\n" ); -xc_evtchn_close (xendev->evtchndev); +xenevtchn_close (xendev->evtchndev);g_free (xendev);return NULL ; }
@@ -306,8 +306,8 @@ static struct XenDevice *xen_be_del_xendev(int dom, int dev)g_free (xendev->fe); } -if (xendev->evtchndev !=XC_HANDLER_INITIAL_VALUE ) { -xc_evtchn_close (xendev->evtchndev); +if (xendev->evtchndev !=NULL ) { +xenevtchn_close (xendev->evtchndev); }if (xendev->gnttabdev !=XC_HANDLER_INITIAL_VALUE ) {xc_gnttab_close (xendev->gnttabdev);
@@ -691,13 +691,14 @@ static void xen_be_evtchn_event(void *opaque)struct XenDevice *xendev = opaque;evtchn_port_t port; - port =xc_evtchn_pending (xendev->evtchndev); + port =xenevtchn_pending (xendev->evtchndev);if (port != xendev->local_port) { -xen_be_printf (xendev,0 ,"xc_evtchn_pending returned %d (expected %d)\n" , +xen_be_printf (xendev,0 , +"xenevtchn_pending returned %d (expected %d)\n" , port, xendev->local_port);return ; } -xc_evtchn_unmask (xendev->evtchndev, port); +xenevtchn_unmask (xendev->evtchndev, port);if (xendev->ops->event) { xendev->ops->event (xendev);
@@ -740,14 +741,14 @@ int xen_be_bind_evtchn(struct XenDevice *xendev)if (xendev->local_port !=-1 ) {return 0 ; } - xendev->local_port =xc_evtchn_bind_interdomain + xendev->local_port =xenevtchn_bind_interdomain (xendev->evtchndev, xendev->dom, xendev->remote_port);if (xendev->local_port ==-1 ) { -xen_be_printf (xendev,0 ,"xc_evtchn_bind_interdomain failed\n" ); +xen_be_printf (xendev,0 ,"xenevtchn_bind_interdomain failed\n" );return -1 ; }xen_be_printf (xendev,2 ,"bind evtchn port %d\n" , xendev->local_port); -qemu_set_fd_handler (xc_evtchn_fd (xendev->evtchndev), +qemu_set_fd_handler (xenevtchn_fd (xendev->evtchndev), xen_be_evtchn_event,NULL , xendev);return 0 ; }
@@ -757,15 +758,15 @@ void xen_be_unbind_evtchn(struct XenDevice *xendev)if (xendev->local_port ==-1 ) {return ; } -qemu_set_fd_handler (xc_evtchn_fd (xendev->evtchndev),NULL ,NULL ,NULL ); -xc_evtchn_unbind (xendev->evtchndev, xendev->local_port); +qemu_set_fd_handler (xenevtchn_fd (xendev->evtchndev),NULL ,NULL ,NULL ); +xenevtchn_unbind (xendev->evtchndev, xendev->local_port);xen_be_printf (xendev,2 ,"unbind evtchn port %d\n" , xendev->local_port); xendev->local_port =-1 ; }int xen_be_send_notify (struct XenDevice *xendev) { -return xc_evtchn_notify (xendev->evtchndev, xendev->local_port); +return xenevtchn_notify (xendev->evtchndev, xendev->local_port); }/*
include/hw/xen/xen_backend.h +1 -1
@@ -46,7 +46,7 @@ struct XenDevice {int remote_port;int local_port; -XenEvtchn evtchndev; +xenevtchn_handle *evtchndev;XenGnttab gnttabdev;struct XenDevOps *ops;
include/hw/xen/xen_common.h +34 -10
68 lines not on this page · raw message
xen-hvm.c +13 -12
@@ -109,7 +109,7 @@ typedef struct XenIOState {/* evtchn local port for buffered io */ evtchn_port_t bufioreq_local_port;/* the evtchn fd for polling */ -XenEvtchn xce_handle; +xenevtchn_handle *xce_handle;/* which vcpu we are serving */ int send_vcpu;
@@ -714,7 +714,7 @@ static ioreq_t *cpu_get_ioreq(XenIOState *state)int i;evtchn_port_t port; - port =xc_evtchn_pending (state->xce_handle); + port =xenevtchn_pending (state->xce_handle);if (port == state->bufioreq_local_port) {timer_mod (state->buffered_io_timer,BUFFER_IO_MAX_DELAY +qemu_clock_get_ms (QEMU_CLOCK_REALTIME ));
@@ -733,7 +733,7 @@ static ioreq_t *cpu_get_ioreq(XenIOState *state) }/* unmask the wanted port again */ -xc_evtchn_unmask (state->xce_handle, port); +xenevtchn_unmask (state->xce_handle, port);/* get the io packet from shared memory */ state->send_vcpu = i;
@@ -1040,7 +1040,7 @@ static void handle_buffered_io(void *opaque) BUFFER_IO_MAX_DELAY + qemu_clock_get_ms(QEMU_CLOCK_REALTIME)); }else {timer_del (state->buffered_io_timer); -xc_evtchn_unmask (state->xce_handle, state->bufioreq_local_port); +xenevtchn_unmask (state->xce_handle, state->bufioreq_local_port); } }
@@ -1084,7 +1084,8 @@ static void cpu_handle_ioreq(void *opaque) } req->state =STATE_IORESP_READY ; -xc_evtchn_notify (state->xce_handle, state->ioreq_local_port[state->send_vcpu]); +xenevtchn_notify (state->xce_handle, + state->ioreq_local_port[state->send_vcpu]); } }
@@ -1092,8 +1093,8 @@ static void xen_main_loop_prepare(XenIOState *state) {int evtchn_fd =-1 ; -if (state->xce_handle !=XC_HANDLER_INITIAL_VALUE ) { - evtchn_fd =xc_evtchn_fd (state->xce_handle); +if (state->xce_handle !=NULL ) { + evtchn_fd =xenevtchn_fd (state->xce_handle); } state->buffered_io_timer = timer_new_ms(QEMU_CLOCK_REALTIME, handle_buffered_io,
@@ -1131,7 +1132,7 @@ static void xen_exit_notifier(Notifier *n, void *data) {XenIOState *state =container_of (n, XenIOState, exit); -xc_evtchn_close (state->xce_handle); +xenevtchn_close (state->xce_handle);xs_daemon_close (state->xenstore); }
@@ -1200,8 +1201,8 @@ int xen_hvm_init(PCMachineState *pcms, state =g_malloc0 (sizeof (XenIOState)); - state->xce_handle =xen_xc_evtchn_open (NULL ,0 ); -if (state->xce_handle ==XC_HANDLER_INITIAL_VALUE ) { + state->xce_handle =xenevtchn_open (NULL ,0 ); +if (state->xce_handle ==NULL ) {perror ("xen: event channel open" );return -1 ; }
@@ -1281,7 +1282,7 @@ int xen_hvm_init(PCMachineState *pcms,/* FIXME: how about if we overflow the page here? */ for (i =0 ; i < max_cpus; i++) { - rc =xc_evtchn_bind_interdomain (state->xce_handle, xen_domid, + rc =xenevtchn_bind_interdomain (state->xce_handle, xen_domid,xen_vcpu_eport (state->shared_page, i));if (rc ==-1 ) {fprintf (stderr,"shared evtchn %d bind error %d\n" , i, errno);
@@ -1290,7 +1291,7 @@ int xen_hvm_init(PCMachineState *pcms, state->ioreq_local_port[i] = rc; } - rc =xc_evtchn_bind_interdomain (state->xce_handle, xen_domid, + rc =xenevtchn_bind_interdomain (state->xce_handle, xen_domid, bufioreq_evtchn);if (rc ==-1 ) {fprintf (stderr,"buffered evtchn bind error %d\n" , errno);
Signature · 1 line
2.1.4
PATCH v7 3/8 xen: Switch to libxengnttab interface for compat shims.
In reply to Ian CampbellIn Xen 4.7 we are refactoring parts libxenctrl into a number of separate libraries which will provide backward and forward API and ABI compatiblity.
One such library will be libxengnttab which provides access to grant tables.
In preparation for this switch the compatibility layer in xen_common.h (which support building with older versions of Xen) to use what will be the new library API. This means that the gnttab shim will disappear for versions of Xen which include libxengnttab.
To simplify things for the <= 4.0.0 support we wrap the int fd in a malloc(sizeof int) such that the handle is always a pointer. This leads to less typedef headaches and the need for XC_HANDLER_INITIAL_VALUE etc for these interfaces.
Note that this patch does not add any support for actually using libxengnttab, it just adjusts the existing shims.
---
v4: Ran checkpatch, fixed all errors
Allocate correct size for handle (i.e. not size of the ptr) Rebase onto "xen_console: correctly cleanup primary console on teardown."
v5: Rebase over b4f72e31b924 "hw/net/xen_nic.c: Free 'netdev->txs' when map 'netdev->rxs' fails" which added a new gnttab_munmap.
v7: s/gnttab_munmap/gnttab_unmap/ to reflect change in the library.
--- hw/block/xen_disk.c | 38 ++++++++++++++++++++------------------ hw/char/xen_console.c | 4 ++-- hw/net/xen_nic.c | 18 +++++++++--------- hw/xen/xen_backend.c | 10 +++++----- include/hw/xen/xen_backend.h | 2 +- include/hw/xen/xen_common.h | 42 ++++++++++++++++++++++++++++++++---------- 6 files changed, 69 insertions(+), 45 deletions(-)
hw/block/xen_disk.c +20 -18
@@ -171,11 +171,11 @@ static gint int_cmp(gconstpointer a, gconstpointer b, gpointer user_data)static void destroy_grant (gpointer pgnt) {PersistentGrant *grant = pgnt; -XenGnttab gnt = grant->blkdev->xendev.gnttabdev; +xengnttab_handle *gnt = grant->blkdev->xendev.gnttabdev; -if (xc_gnttab_munmap (gnt, grant->page,1 ) !=0 ) { +if (xengnttab_unmap (gnt, grant->page,1 ) !=0 ) {xen_be_printf (&grant->blkdev->xendev,0 , -"xc_gnttab_munmap failed: %s\n" , +"xengnttab_unmap failed: %s\n" ,strerror (errno)); } grant->blkdev->persistent_gnt_count--;
@@ -188,11 +188,11 @@ static void remove_persistent_region(gpointer data, gpointer dev) {PersistentRegion *region = data;struct XenBlkDev *blkdev = dev; -XenGnttab gnt = blkdev->xendev.gnttabdev; +xengnttab_handle *gnt = blkdev->xendev.gnttabdev; -if (xc_gnttab_munmap (gnt, region->addr, region->num) !=0 ) { +if (xengnttab_unmap (gnt, region->addr, region->num) !=0 ) {xen_be_printf (&blkdev->xendev,0 , -"xc_gnttab_munmap region %p failed: %s\n" , +"xengnttab_unmap region %p failed: %s\n" , region->addr,strerror (errno)); } xen_be_printf(&blkdev->xendev, 3,
@@ -327,7 +327,7 @@ err:static void ioreq_unmap (struct ioreq *ioreq) { -XenGnttab gnt = ioreq->blkdev->xendev.gnttabdev; +xengnttab_handle *gnt = ioreq->blkdev->xendev.gnttabdev;int i;if (ioreq->num_unmap ==0 || ioreq->mapped ==0 ) {
@@ -337,8 +337,9 @@ static void ioreq_unmap(struct ioreq *ioreq)if (!ioreq->pages) {return ; } -if (xc_gnttab_munmap (gnt, ioreq->pages, ioreq->num_unmap) !=0 ) { -xen_be_printf (&ioreq->blkdev->xendev,0 ,"xc_gnttab_munmap failed: %s\n" , +if (xengnttab_unmap (gnt, ioreq->pages, ioreq->num_unmap) !=0 ) { +xen_be_printf (&ioreq->blkdev->xendev,0 , +"xengnttab_unmap failed: %s\n" ,strerror (errno)); } ioreq->blkdev->cnt_map -= ioreq->num_unmap;
@@ -348,8 +349,9 @@ static void ioreq_unmap(struct ioreq *ioreq)if (!ioreq->page[i]) {continue ; } -if (xc_gnttab_munmap (gnt, ioreq->page[i],1 ) !=0 ) { -xen_be_printf (&ioreq->blkdev->xendev,0 ,"xc_gnttab_munmap failed: %s\n" , +if (xengnttab_unmap (gnt, ioreq->page[i],1 ) !=0 ) { +xen_be_printf (&ioreq->blkdev->xendev,0 , +"xengnttab_unmap failed: %s\n" ,strerror (errno)); } ioreq->blkdev->cnt_map--;
@@ -361,7 +363,7 @@ static void ioreq_unmap(struct ioreq *ioreq)static int ioreq_map (struct ioreq *ioreq) { -XenGnttab gnt = ioreq->blkdev->xendev.gnttabdev; +xengnttab_handle *gnt = ioreq->blkdev->xendev.gnttabdev;uint32_t domids[BLKIF_MAX_SEGMENTS_PER_REQUEST ];uint32_t refs[BLKIF_MAX_SEGMENTS_PER_REQUEST ];void *page[BLKIF_MAX_SEGMENTS_PER_REQUEST ];
@@ -412,7 +414,7 @@ static int ioreq_map(struct ioreq *ioreq) }if (batch_maps && new_maps) { - ioreq->pages =xc_gnttab_map_grant_refs + ioreq->pages =xengnttab_map_grant_refs (gnt, new_maps, domids, refs, ioreq->prot);if (ioreq->pages ==NULL ) { xen_be_printf(&ioreq->blkdev->xendev, 0,
@@ -428,7 +430,7 @@ static int ioreq_map(struct ioreq *ioreq) ioreq->blkdev->cnt_map += new_maps; }else if (new_maps) {for (i =0 ; i < new_maps; i++) { - ioreq->page[i] =xc_gnttab_map_grant_ref + ioreq->page[i] =xengnttab_map_grant_ref (gnt, domids[i], refs[i], ioreq->prot);if (ioreq->page[i] ==NULL ) { xen_be_printf(&ioreq->blkdev->xendev, 0,
@@ -778,9 +780,9 @@ static void blk_alloc(struct XenDevice *xendev)if (xen_mode !=XEN_EMULATE ) { batch_maps =1 ; } -if (xc_gnttab_set_max_grants (xendev->gnttabdev, +if (xengnttab_set_max_grants (xendev->gnttabdev,MAX_GRANTS (max_requests,BLKIF_MAX_SEGMENTS_PER_REQUEST )) <0 ) { -xen_be_printf (xendev,0 ,"xc_gnttab_set_max_grants failed: %s\n" , +xen_be_printf (xendev,0 ,"xengnttab_set_max_grants failed: %s\n" ,strerror (errno)); } }
@@ -987,7 +989,7 @@ static int blk_connect(struct XenDevice *xendev) } } - blkdev->sring =xc_gnttab_map_grant_ref (blkdev->xendev.gnttabdev, + blkdev->sring =xengnttab_map_grant_ref (blkdev->xendev.gnttabdev, blkdev->xendev.dom, blkdev->ring_ref,PROT_READ |PROT_WRITE );
@@ -1052,7 +1054,7 @@ static void blk_disconnect(struct XenDevice *xendev)xen_be_unbind_evtchn (&blkdev->xendev);if (blkdev->sring) { -xc_gnttab_munmap (blkdev->xendev.gnttabdev, blkdev->sring,1 ); +xengnttab_unmap (blkdev->xendev.gnttabdev, blkdev->sring,1 ); blkdev->cnt_map--; blkdev->sring =NULL ; }
hw/char/xen_console.c +2 -2
@@ -233,7 +233,7 @@ static int con_initialise(struct XenDevice *xendev)PROT_READ |PROT_WRITE , con->ring_ref); }else { - con->sring =xc_gnttab_map_grant_ref (xendev->gnttabdev, con->xendev.dom, + con->sring =xengnttab_map_grant_ref (xendev->gnttabdev, con->xendev.dom, con->ring_ref,PROT_READ |PROT_WRITE ); }
@@ -275,7 +275,7 @@ static void con_disconnect(struct XenDevice *xendev)if (!xendev->dev) {munmap (con->sring,XC_PAGE_SIZE ); }else { -xc_gnttab_munmap (xendev->gnttabdev, con->sring,1 ); +xengnttab_unmap (xendev->gnttabdev, con->sring,1 ); } con->sring =NULL ; }
hw/net/xen_nic.c +9 -9
@@ -168,7 +168,7 @@ static void net_tx_packets(struct XenNetDev *netdev) (txreq.flags & NETTXF_more_data) ?" more_data" :"" , (txreq.flags & NETTXF_extra_info) ? " extra_info" : ""); - page =xc_gnttab_map_grant_ref (netdev->xendev.gnttabdev, + page =xengnttab_map_grant_ref (netdev->xendev.gnttabdev, netdev->xendev.dom, txreq.gref,PROT_READ );if (page ==NULL ) {
@@ -190,7 +190,7 @@ static void net_tx_packets(struct XenNetDev *netdev)qemu_send_packet (qemu_get_queue (netdev->nic), page + txreq.offset, txreq.size); } -xc_gnttab_munmap (netdev->xendev.gnttabdev, page,1 ); +xengnttab_unmap (netdev->xendev.gnttabdev, page,1 );net_tx_response (netdev, &txreq,NETIF_RSP_OKAY ); }if (!netdev->tx_work) {
@@ -260,7 +260,7 @@ static ssize_t net_rx_packet(NetClientState *nc, const uint8_t *buf, size_t sizememcpy (&rxreq,RING_GET_REQUEST (&netdev->rx_ring, rc),sizeof (rxreq)); netdev->rx_ring.req_cons = ++rc; - page =xc_gnttab_map_grant_ref (netdev->xendev.gnttabdev, + page =xengnttab_map_grant_ref (netdev->xendev.gnttabdev, netdev->xendev.dom, rxreq.gref,PROT_WRITE );if (page ==NULL ) {
@@ -270,7 +270,7 @@ static ssize_t net_rx_packet(NetClientState *nc, const uint8_t *buf, size_t sizereturn -1 ; }memcpy (page +NET_IP_ALIGN , buf, size); -xc_gnttab_munmap (netdev->xendev.gnttabdev, page,1 ); +xengnttab_unmap (netdev->xendev.gnttabdev, page,1 );net_rx_response (netdev, &rxreq,NETIF_RSP_OKAY ,NET_IP_ALIGN , size,0 );return size;
@@ -342,19 +342,19 @@ static int net_connect(struct XenDevice *xendev)return -1 ; } - netdev->txs =xc_gnttab_map_grant_ref (netdev->xendev.gnttabdev, + netdev->txs =xengnttab_map_grant_ref (netdev->xendev.gnttabdev, netdev->xendev.dom, netdev->tx_ring_ref,PROT_READ |PROT_WRITE );if (!netdev->txs) {return -1 ; } - netdev->rxs =xc_gnttab_map_grant_ref (netdev->xendev.gnttabdev, + netdev->rxs =xengnttab_map_grant_ref (netdev->xendev.gnttabdev, netdev->xendev.dom, netdev->rx_ring_ref,PROT_READ |PROT_WRITE );if (!netdev->rxs) { -xc_gnttab_munmap (netdev->xendev.gnttabdev, netdev->txs,1 ); +xengnttab_unmap (netdev->xendev.gnttabdev, netdev->txs,1 ); netdev->txs =NULL ;return -1 ; }
@@ -379,11 +379,11 @@ static void net_disconnect(struct XenDevice *xendev)xen_be_unbind_evtchn (&netdev->xendev);if (netdev->txs) { -xc_gnttab_munmap (netdev->xendev.gnttabdev, netdev->txs,1 ); +xengnttab_unmap (netdev->xendev.gnttabdev, netdev->txs,1 ); netdev->txs =NULL ; }if (netdev->rxs) { -xc_gnttab_munmap (netdev->xendev.gnttabdev, netdev->rxs,1 ); +xengnttab_unmap (netdev->xendev.gnttabdev, netdev->rxs,1 ); netdev->rxs =NULL ; } }
hw/xen/xen_backend.c +5 -5
@@ -252,15 +252,15 @@ static struct XenDevice *xen_be_get_xendev(const char *type, int dom, int dev,fcntl (xenevtchn_fd (xendev->evtchndev),F_SETFD ,FD_CLOEXEC );if (ops->flags &DEVOPS_FLAG_NEED_GNTDEV ) { - xendev->gnttabdev =xen_xc_gnttab_open (NULL ,0 ); -if (xendev->gnttabdev ==XC_HANDLER_INITIAL_VALUE ) { + xendev->gnttabdev =xengnttab_open (NULL ,0 ); +if (xendev->gnttabdev ==NULL ) {xen_be_printf (NULL ,0 ,"can't open gnttab device\n" );xenevtchn_close (xendev->evtchndev);g_free (xendev);return NULL ; } }else { - xendev->gnttabdev =XC_HANDLER_INITIAL_VALUE ; + xendev->gnttabdev =NULL ; }QTAILQ_INSERT_TAIL (&xendevs, xendev, next);
@@ -309,8 +309,8 @@ static struct XenDevice *xen_be_del_xendev(int dom, int dev)if (xendev->evtchndev !=NULL ) {xenevtchn_close (xendev->evtchndev); } -if (xendev->gnttabdev !=XC_HANDLER_INITIAL_VALUE ) { -xc_gnttab_close (xendev->gnttabdev); +if (xendev->gnttabdev !=NULL ) { +xengnttab_close (xendev->gnttabdev); }QTAILQ_REMOVE (&xendevs, xendev, next);
include/hw/xen/xen_backend.h +1 -1
@@ -47,7 +47,7 @@ struct XenDevice {int local_port;xenevtchn_handle *evtchndev; -XenGnttab gnttabdev; +xengnttab_handle *gnttabdev;struct XenDevOps *ops;QTAILQ_ENTRY (XenDevice) next;
include/hw/xen/xen_common.h +32 -10
68 lines not on this page · raw message
Signature · 1 line
2.1.4
PATCH v7 3/8 xen: Switch to libxengnttab interface for compat shims.
In reply to Ian CampbellIn Xen 4.7 we are refactoring parts libxenctrl into a number of separate libraries which will provide backward and forward API and ABI compatiblity.
One such library will be libxengnttab which provides access to grant tables.
In preparation for this switch the compatibility layer in xen_common.h (which support building with older versions of Xen) to use what will be the new library API. This means that the gnttab shim will disappear for versions of Xen which include libxengnttab.
To simplify things for the <= 4.0.0 support we wrap the int fd in a malloc(sizeof int) such that the handle is always a pointer. This leads to less typedef headaches and the need for XC_HANDLER_INITIAL_VALUE etc for these interfaces.
Note that this patch does not add any support for actually using libxengnttab, it just adjusts the existing shims.
---
v4: Ran checkpatch, fixed all errors
Allocate correct size for handle (i.e. not size of the ptr) Rebase onto "xen_console: correctly cleanup primary console on teardown."
v5: Rebase over b4f72e31b924 "hw/net/xen_nic.c: Free 'netdev->txs' when map 'netdev->rxs' fails" which added a new gnttab_munmap.
v7: s/gnttab_munmap/gnttab_unmap/ to reflect change in the library.
--- hw/block/xen_disk.c | 38 ++++++++++++++++++++------------------ hw/char/xen_console.c | 4 ++-- hw/net/xen_nic.c | 18 +++++++++--------- hw/xen/xen_backend.c | 10 +++++----- include/hw/xen/xen_backend.h | 2 +- include/hw/xen/xen_common.h | 42 ++++++++++++++++++++++++++++++++---------- 6 files changed, 69 insertions(+), 45 deletions(-)
hw/block/xen_disk.c +20 -18
@@ -171,11 +171,11 @@ static gint int_cmp(gconstpointer a, gconstpointer b, gpointer user_data)static void destroy_grant (gpointer pgnt) {PersistentGrant *grant = pgnt; -XenGnttab gnt = grant->blkdev->xendev.gnttabdev; +xengnttab_handle *gnt = grant->blkdev->xendev.gnttabdev; -if (xc_gnttab_munmap (gnt, grant->page,1 ) !=0 ) { +if (xengnttab_unmap (gnt, grant->page,1 ) !=0 ) {xen_be_printf (&grant->blkdev->xendev,0 , -"xc_gnttab_munmap failed: %s\n" , +"xengnttab_unmap failed: %s\n" ,strerror (errno)); } grant->blkdev->persistent_gnt_count--;
@@ -188,11 +188,11 @@ static void remove_persistent_region(gpointer data, gpointer dev) {PersistentRegion *region = data;struct XenBlkDev *blkdev = dev; -XenGnttab gnt = blkdev->xendev.gnttabdev; +xengnttab_handle *gnt = blkdev->xendev.gnttabdev; -if (xc_gnttab_munmap (gnt, region->addr, region->num) !=0 ) { +if (xengnttab_unmap (gnt, region->addr, region->num) !=0 ) {xen_be_printf (&blkdev->xendev,0 , -"xc_gnttab_munmap region %p failed: %s\n" , +"xengnttab_unmap region %p failed: %s\n" , region->addr,strerror (errno)); } xen_be_printf(&blkdev->xendev, 3,
@@ -327,7 +327,7 @@ err:static void ioreq_unmap (struct ioreq *ioreq) { -XenGnttab gnt = ioreq->blkdev->xendev.gnttabdev; +xengnttab_handle *gnt = ioreq->blkdev->xendev.gnttabdev;int i;if (ioreq->num_unmap ==0 || ioreq->mapped ==0 ) {
@@ -337,8 +337,9 @@ static void ioreq_unmap(struct ioreq *ioreq)if (!ioreq->pages) {return ; } -if (xc_gnttab_munmap (gnt, ioreq->pages, ioreq->num_unmap) !=0 ) { -xen_be_printf (&ioreq->blkdev->xendev,0 ,"xc_gnttab_munmap failed: %s\n" , +if (xengnttab_unmap (gnt, ioreq->pages, ioreq->num_unmap) !=0 ) { +xen_be_printf (&ioreq->blkdev->xendev,0 , +"xengnttab_unmap failed: %s\n" ,strerror (errno)); } ioreq->blkdev->cnt_map -= ioreq->num_unmap;
@@ -348,8 +349,9 @@ static void ioreq_unmap(struct ioreq *ioreq)if (!ioreq->page[i]) {continue ; } -if (xc_gnttab_munmap (gnt, ioreq->page[i],1 ) !=0 ) { -xen_be_printf (&ioreq->blkdev->xendev,0 ,"xc_gnttab_munmap failed: %s\n" , +if (xengnttab_unmap (gnt, ioreq->page[i],1 ) !=0 ) { +xen_be_printf (&ioreq->blkdev->xendev,0 , +"xengnttab_unmap failed: %s\n" ,strerror (errno)); } ioreq->blkdev->cnt_map--;
@@ -361,7 +363,7 @@ static void ioreq_unmap(struct ioreq *ioreq)static int ioreq_map (struct ioreq *ioreq) { -XenGnttab gnt = ioreq->blkdev->xendev.gnttabdev; +xengnttab_handle *gnt = ioreq->blkdev->xendev.gnttabdev;uint32_t domids[BLKIF_MAX_SEGMENTS_PER_REQUEST ];uint32_t refs[BLKIF_MAX_SEGMENTS_PER_REQUEST ];void *page[BLKIF_MAX_SEGMENTS_PER_REQUEST ];
@@ -412,7 +414,7 @@ static int ioreq_map(struct ioreq *ioreq) }if (batch_maps && new_maps) { - ioreq->pages =xc_gnttab_map_grant_refs + ioreq->pages =xengnttab_map_grant_refs (gnt, new_maps, domids, refs, ioreq->prot);if (ioreq->pages ==NULL ) { xen_be_printf(&ioreq->blkdev->xendev, 0,
@@ -428,7 +430,7 @@ static int ioreq_map(struct ioreq *ioreq) ioreq->blkdev->cnt_map += new_maps; }else if (new_maps) {for (i =0 ; i < new_maps; i++) { - ioreq->page[i] =xc_gnttab_map_grant_ref + ioreq->page[i] =xengnttab_map_grant_ref (gnt, domids[i], refs[i], ioreq->prot);if (ioreq->page[i] ==NULL ) { xen_be_printf(&ioreq->blkdev->xendev, 0,
@@ -778,9 +780,9 @@ static void blk_alloc(struct XenDevice *xendev)if (xen_mode !=XEN_EMULATE ) { batch_maps =1 ; } -if (xc_gnttab_set_max_grants (xendev->gnttabdev, +if (xengnttab_set_max_grants (xendev->gnttabdev,MAX_GRANTS (max_requests,BLKIF_MAX_SEGMENTS_PER_REQUEST )) <0 ) { -xen_be_printf (xendev,0 ,"xc_gnttab_set_max_grants failed: %s\n" , +xen_be_printf (xendev,0 ,"xengnttab_set_max_grants failed: %s\n" ,strerror (errno)); } }
@@ -987,7 +989,7 @@ static int blk_connect(struct XenDevice *xendev) } } - blkdev->sring =xc_gnttab_map_grant_ref (blkdev->xendev.gnttabdev, + blkdev->sring =xengnttab_map_grant_ref (blkdev->xendev.gnttabdev, blkdev->xendev.dom, blkdev->ring_ref,PROT_READ |PROT_WRITE );
@@ -1052,7 +1054,7 @@ static void blk_disconnect(struct XenDevice *xendev)xen_be_unbind_evtchn (&blkdev->xendev);if (blkdev->sring) { -xc_gnttab_munmap (blkdev->xendev.gnttabdev, blkdev->sring,1 ); +xengnttab_unmap (blkdev->xendev.gnttabdev, blkdev->sring,1 ); blkdev->cnt_map--; blkdev->sring =NULL ; }
hw/char/xen_console.c +2 -2
@@ -233,7 +233,7 @@ static int con_initialise(struct XenDevice *xendev)PROT_READ |PROT_WRITE , con->ring_ref); }else { - con->sring =xc_gnttab_map_grant_ref (xendev->gnttabdev, con->xendev.dom, + con->sring =xengnttab_map_grant_ref (xendev->gnttabdev, con->xendev.dom, con->ring_ref,PROT_READ |PROT_WRITE ); }
@@ -275,7 +275,7 @@ static void con_disconnect(struct XenDevice *xendev)if (!xendev->dev) {munmap (con->sring,XC_PAGE_SIZE ); }else { -xc_gnttab_munmap (xendev->gnttabdev, con->sring,1 ); +xengnttab_unmap (xendev->gnttabdev, con->sring,1 ); } con->sring =NULL ; }
hw/net/xen_nic.c +9 -9
@@ -168,7 +168,7 @@ static void net_tx_packets(struct XenNetDev *netdev) (txreq.flags & NETTXF_more_data) ?" more_data" :"" , (txreq.flags & NETTXF_extra_info) ? " extra_info" : ""); - page =xc_gnttab_map_grant_ref (netdev->xendev.gnttabdev, + page =xengnttab_map_grant_ref (netdev->xendev.gnttabdev, netdev->xendev.dom, txreq.gref,PROT_READ );if (page ==NULL ) {
@@ -190,7 +190,7 @@ static void net_tx_packets(struct XenNetDev *netdev)qemu_send_packet (qemu_get_queue (netdev->nic), page + txreq.offset, txreq.size); } -xc_gnttab_munmap (netdev->xendev.gnttabdev, page,1 ); +xengnttab_unmap (netdev->xendev.gnttabdev, page,1 );net_tx_response (netdev, &txreq,NETIF_RSP_OKAY ); }if (!netdev->tx_work) {
@@ -260,7 +260,7 @@ static ssize_t net_rx_packet(NetClientState *nc, const uint8_t *buf, size_t sizememcpy (&rxreq,RING_GET_REQUEST (&netdev->rx_ring, rc),sizeof (rxreq)); netdev->rx_ring.req_cons = ++rc; - page =xc_gnttab_map_grant_ref (netdev->xendev.gnttabdev, + page =xengnttab_map_grant_ref (netdev->xendev.gnttabdev, netdev->xendev.dom, rxreq.gref,PROT_WRITE );if (page ==NULL ) {
@@ -270,7 +270,7 @@ static ssize_t net_rx_packet(NetClientState *nc, const uint8_t *buf, size_t sizereturn -1 ; }memcpy (page +NET_IP_ALIGN , buf, size); -xc_gnttab_munmap (netdev->xendev.gnttabdev, page,1 ); +xengnttab_unmap (netdev->xendev.gnttabdev, page,1 );net_rx_response (netdev, &rxreq,NETIF_RSP_OKAY ,NET_IP_ALIGN , size,0 );return size;
@@ -342,19 +342,19 @@ static int net_connect(struct XenDevice *xendev)return -1 ; } - netdev->txs =xc_gnttab_map_grant_ref (netdev->xendev.gnttabdev, + netdev->txs =xengnttab_map_grant_ref (netdev->xendev.gnttabdev, netdev->xendev.dom, netdev->tx_ring_ref,PROT_READ |PROT_WRITE );if (!netdev->txs) {return -1 ; } - netdev->rxs =xc_gnttab_map_grant_ref (netdev->xendev.gnttabdev, + netdev->rxs =xengnttab_map_grant_ref (netdev->xendev.gnttabdev, netdev->xendev.dom, netdev->rx_ring_ref,PROT_READ |PROT_WRITE );if (!netdev->rxs) { -xc_gnttab_munmap (netdev->xendev.gnttabdev, netdev->txs,1 ); +xengnttab_unmap (netdev->xendev.gnttabdev, netdev->txs,1 ); netdev->txs =NULL ;return -1 ; }
@@ -379,11 +379,11 @@ static void net_disconnect(struct XenDevice *xendev)xen_be_unbind_evtchn (&netdev->xendev);if (netdev->txs) { -xc_gnttab_munmap (netdev->xendev.gnttabdev, netdev->txs,1 ); +xengnttab_unmap (netdev->xendev.gnttabdev, netdev->txs,1 ); netdev->txs =NULL ; }if (netdev->rxs) { -xc_gnttab_munmap (netdev->xendev.gnttabdev, netdev->rxs,1 ); +xengnttab_unmap (netdev->xendev.gnttabdev, netdev->rxs,1 ); netdev->rxs =NULL ; } }
hw/xen/xen_backend.c +5 -5
@@ -252,15 +252,15 @@ static struct XenDevice *xen_be_get_xendev(const char *type, int dom, int dev,fcntl (xenevtchn_fd (xendev->evtchndev),F_SETFD ,FD_CLOEXEC );if (ops->flags &DEVOPS_FLAG_NEED_GNTDEV ) { - xendev->gnttabdev =xen_xc_gnttab_open (NULL ,0 ); -if (xendev->gnttabdev ==XC_HANDLER_INITIAL_VALUE ) { + xendev->gnttabdev =xengnttab_open (NULL ,0 ); +if (xendev->gnttabdev ==NULL ) {xen_be_printf (NULL ,0 ,"can't open gnttab device\n" );xenevtchn_close (xendev->evtchndev);g_free (xendev);return NULL ; } }else { - xendev->gnttabdev =XC_HANDLER_INITIAL_VALUE ; + xendev->gnttabdev =NULL ; }QTAILQ_INSERT_TAIL (&xendevs, xendev, next);
@@ -309,8 +309,8 @@ static struct XenDevice *xen_be_del_xendev(int dom, int dev)if (xendev->evtchndev !=NULL ) {xenevtchn_close (xendev->evtchndev); } -if (xendev->gnttabdev !=XC_HANDLER_INITIAL_VALUE ) { -xc_gnttab_close (xendev->gnttabdev); +if (xendev->gnttabdev !=NULL ) { +xengnttab_close (xendev->gnttabdev); }QTAILQ_REMOVE (&xendevs, xendev, next);
include/hw/xen/xen_backend.h +1 -1
@@ -47,7 +47,7 @@ struct XenDevice {int local_port;xenevtchn_handle *evtchndev; -XenGnttab gnttabdev; +xengnttab_handle *gnttabdev;struct XenDevOps *ops;QTAILQ_ENTRY (XenDevice) next;
include/hw/xen/xen_common.h +32 -10
68 lines not on this page · raw message
Signature · 1 line
2.1.4
PATCH v7 4/8 xen: Switch uses of xc_map_foreign_range into xc_map_foreign_pages
In reply to Ian CampbellIn Xen 4.7 we are refactoring parts libxenctrl into a number of separate libraries which will provide backward and forward API and ABI compatiblity.
One such library will be libxenforeignmemory which provides access to privileged foreign mappings and which will provide an interface equivalent to xc_map_foreign_{pages,bulk}.
In preparation for this switch all uses of xc_map_foreign_range to xc_map_foreign_pages. This is trivial because size was always XC_PAGE_SIZE so the necessary adjustments are trivial:
* Pass &mfn (an array of length 1) instead of mfn. The function takes a pointer to const, so there is no possibily of mfn changing due to this change.
* Pass nr_pages=1 instead of size=XC_PAGE_SIZE
There is one wrinkle in xen_console.c:con_initialise() where con->ring_ref is an int but can in some code paths (when !xendev->dev) be treated as an mfn. I think this is an existing latent truncation hazard on platforms where xen_pfn_t is 64-bit and int is 32-bit (e.g. amd64, both arm* variants). I'm unsure under what circumstances xendev->dev can be NULL or if anything elsewhere ensures the value fits into an int. For now I just use a temporary xen_pfn_t to in effect upcast the pointer from int* to xen_pfn_t*.
In xenfb.c:common_bind we now explicitly launder the mfn into a xen_pfn_t, so it has the correct type to be passed to xc_map_foreign_pages and doesn't provoke warnings on 32-bit x86.
---
v7: Correct type mismatch (int64 vs xen_pfn_t) on 32 bit x86 in
xenfb.c, by explicitly laundering via a xen_pfn_t variable.
v6: Switch to xc_map_foreign_pages rather than _bulk. Switching to
_bulk without checking the value of err[0] risked missing errors. The new xenforeignmemory_map coming later in this series will DTRT with err==NULL.
Dropped Stefano's Reviewed-by due to this change.
v4: Ran checkpatch, fixed all errors
Mention the const-ness of the mfn array in the commit log
fixup!xen: Switch uses of xc_map_foreign_range into xc_map_foreign_pages
--- hw/char/xen_console.c | 8 ++++---- hw/display/xenfb.c | 15 ++++++++------- xen-hvm.c | 14 +++++++------- 3 files changed, 19 insertions(+), 18 deletions(-)
hw/char/xen_console.c +4 -4
@@ -228,10 +228,10 @@ static int con_initialise(struct XenDevice *xendev) con->buffer.max_capacity = limit;if (!xendev->dev) { - con->sring =xc_map_foreign_range (xen_xc, con->xendev.dom, -XC_PAGE_SIZE , -PROT_READ |PROT_WRITE , - con->ring_ref); +xen_pfn_t mfn = con->ring_ref; + con->sring =xc_map_foreign_pages (xen_xc, con->xendev.dom, +PROT_READ |PROT_WRITE , + &mfn,1 ); }else { con->sring = xengnttab_map_grant_ref(xendev->gnttabdev, con->xendev.dom, con->ring_ref,
hw/display/xenfb.c +8 -7
@@ -95,23 +95,24 @@ struct XenFB {static int common_bind (struct common *c) { -uint64_t mfn; +uint64_t val; +xen_pfn_t mfn; -if (xenstore_read_fe_uint64 (&c->xendev,"page-ref" , &mfn) ==-1 ) +if (xenstore_read_fe_uint64 (&c->xendev,"page-ref" , &val) ==-1 )return -1 ; -assert (mfn == (xen_pfn_t )mfn); + mfn = (xen_pfn_t )val; +assert (val == mfn);if (xenstore_read_fe_int (&c->xendev,"event-channel" , &c->xendev.remote_port) ==-1 )return -1 ; - c->page =xc_map_foreign_range (xen_xc, c->xendev.dom, -XC_PAGE_SIZE , -PROT_READ |PROT_WRITE , mfn); + c->page =xc_map_foreign_pages (xen_xc, c->xendev.dom, +PROT_READ |PROT_WRITE , &mfn,1 );if (c->page ==NULL )return -1 ;xen_be_bind_evtchn (&c->xendev); -xen_be_printf (&c->xendev,1 ,"ring mfn %" PRIx64", remote-port %d, local-port %d\n" , +xen_be_printf (&c->xendev,1 ,"ring mfn %" PRI_xen_pfn", remote-port %d, local-port %d\n" , mfn, c->xendev.remote_port, c->xendev.local_port);return 0 ;
xen-hvm.c +7 -7
@@ -1240,8 +1240,9 @@ int xen_hvm_init(PCMachineState *pcms,DPRINTF ("buffered io page at pfn %lx\n" , bufioreq_pfn);DPRINTF ("buffered io evtchn is %x\n" , bufioreq_evtchn); - state->shared_page =xc_map_foreign_range (xen_xc, xen_domid,XC_PAGE_SIZE , -PROT_READ |PROT_WRITE , ioreq_pfn); + state->shared_page =xc_map_foreign_pages (xen_xc, xen_domid, +PROT_READ |PROT_WRITE , + &ioreq_pfn,1 );if (state->shared_page ==NULL ) {hw_error ("map shared IO page returned error %d handle=" XC_INTERFACE_FMT , errno, xen_xc);
@@ -1251,8 +1252,8 @@ int xen_hvm_init(PCMachineState *pcms,if (!rc) {DPRINTF ("shared vmport page at pfn %lx\n" , ioreq_pfn); state->shared_vmport_page = -xc_map_foreign_range (xen_xc, xen_domid,XC_PAGE_SIZE , -PROT_READ |PROT_WRITE , ioreq_pfn); +xc_map_foreign_pages (xen_xc, xen_domid,PROT_READ |PROT_WRITE , + &ioreq_pfn,1 );if (state->shared_vmport_page ==NULL ) {hw_error ("map shared vmport IO page returned error %d handle=" XC_INTERFACE_FMT , errno, xen_xc);
@@ -1261,10 +1262,9 @@ int xen_hvm_init(PCMachineState *pcms,hw_error ("get vmport regs pfn returned error %d, rc=%d" , errno, rc); } - state->buffered_io_page =xc_map_foreign_range (xen_xc, xen_domid, -XC_PAGE_SIZE , + state->buffered_io_page =xc_map_foreign_pages (xen_xc, xen_domid,PROT_READ |PROT_WRITE , - bufioreq_pfn); + &bufioreq_pfn,1 );if (state->buffered_io_page ==NULL ) {hw_error ("map buffered IO page returned error %d" , errno); }
Signature · 1 line
2.1.4
PATCH v7 4/8 xen: Switch uses of xc_map_foreign_range into xc_map_foreign_pages
In reply to Ian CampbellIn Xen 4.7 we are refactoring parts libxenctrl into a number of separate libraries which will provide backward and forward API and ABI compatiblity.
One such library will be libxenforeignmemory which provides access to privileged foreign mappings and which will provide an interface equivalent to xc_map_foreign_{pages,bulk}.
In preparation for this switch all uses of xc_map_foreign_range to xc_map_foreign_pages. This is trivial because size was always XC_PAGE_SIZE so the necessary adjustments are trivial:
* Pass &mfn (an array of length 1) instead of mfn. The function takes a pointer to const, so there is no possibily of mfn changing due to this change.
* Pass nr_pages=1 instead of size=XC_PAGE_SIZE
There is one wrinkle in xen_console.c:con_initialise() where con->ring_ref is an int but can in some code paths (when !xendev->dev) be treated as an mfn. I think this is an existing latent truncation hazard on platforms where xen_pfn_t is 64-bit and int is 32-bit (e.g. amd64, both arm* variants). I'm unsure under what circumstances xendev->dev can be NULL or if anything elsewhere ensures the value fits into an int. For now I just use a temporary xen_pfn_t to in effect upcast the pointer from int* to xen_pfn_t*.
In xenfb.c:common_bind we now explicitly launder the mfn into a xen_pfn_t, so it has the correct type to be passed to xc_map_foreign_pages and doesn't provoke warnings on 32-bit x86.
---
v7: Correct type mismatch (int64 vs xen_pfn_t) on 32 bit x86 in
xenfb.c, by explicitly laundering via a xen_pfn_t variable.
v6: Switch to xc_map_foreign_pages rather than _bulk. Switching to
_bulk without checking the value of err[0] risked missing errors. The new xenforeignmemory_map coming later in this series will DTRT with err==NULL.
Dropped Stefano's Reviewed-by due to this change.
v4: Ran checkpatch, fixed all errors
Mention the const-ness of the mfn array in the commit log
fixup!xen: Switch uses of xc_map_foreign_range into xc_map_foreign_pages
--- hw/char/xen_console.c | 8 ++++---- hw/display/xenfb.c | 15 ++++++++------- xen-hvm.c | 14 +++++++------- 3 files changed, 19 insertions(+), 18 deletions(-)
hw/char/xen_console.c +4 -4
@@ -228,10 +228,10 @@ static int con_initialise(struct XenDevice *xendev) con->buffer.max_capacity = limit;if (!xendev->dev) { - con->sring =xc_map_foreign_range (xen_xc, con->xendev.dom, -XC_PAGE_SIZE , -PROT_READ |PROT_WRITE , - con->ring_ref); +xen_pfn_t mfn = con->ring_ref; + con->sring =xc_map_foreign_pages (xen_xc, con->xendev.dom, +PROT_READ |PROT_WRITE , + &mfn,1 ); }else { con->sring = xengnttab_map_grant_ref(xendev->gnttabdev, con->xendev.dom, con->ring_ref,
hw/display/xenfb.c +8 -7
@@ -95,23 +95,24 @@ struct XenFB {static int common_bind (struct common *c) { -uint64_t mfn; +uint64_t val; +xen_pfn_t mfn; -if (xenstore_read_fe_uint64 (&c->xendev,"page-ref" , &mfn) ==-1 ) +if (xenstore_read_fe_uint64 (&c->xendev,"page-ref" , &val) ==-1 )return -1 ; -assert (mfn == (xen_pfn_t )mfn); + mfn = (xen_pfn_t )val; +assert (val == mfn);if (xenstore_read_fe_int (&c->xendev,"event-channel" , &c->xendev.remote_port) ==-1 )return -1 ; - c->page =xc_map_foreign_range (xen_xc, c->xendev.dom, -XC_PAGE_SIZE , -PROT_READ |PROT_WRITE , mfn); + c->page =xc_map_foreign_pages (xen_xc, c->xendev.dom, +PROT_READ |PROT_WRITE , &mfn,1 );if (c->page ==NULL )return -1 ;xen_be_bind_evtchn (&c->xendev); -xen_be_printf (&c->xendev,1 ,"ring mfn %" PRIx64", remote-port %d, local-port %d\n" , +xen_be_printf (&c->xendev,1 ,"ring mfn %" PRI_xen_pfn", remote-port %d, local-port %d\n" , mfn, c->xendev.remote_port, c->xendev.local_port);return 0 ;
xen-hvm.c +7 -7
@@ -1240,8 +1240,9 @@ int xen_hvm_init(PCMachineState *pcms,DPRINTF ("buffered io page at pfn %lx\n" , bufioreq_pfn);DPRINTF ("buffered io evtchn is %x\n" , bufioreq_evtchn); - state->shared_page =xc_map_foreign_range (xen_xc, xen_domid,XC_PAGE_SIZE , -PROT_READ |PROT_WRITE , ioreq_pfn); + state->shared_page =xc_map_foreign_pages (xen_xc, xen_domid, +PROT_READ |PROT_WRITE , + &ioreq_pfn,1 );if (state->shared_page ==NULL ) {hw_error ("map shared IO page returned error %d handle=" XC_INTERFACE_FMT , errno, xen_xc);
@@ -1251,8 +1252,8 @@ int xen_hvm_init(PCMachineState *pcms,if (!rc) {DPRINTF ("shared vmport page at pfn %lx\n" , ioreq_pfn); state->shared_vmport_page = -xc_map_foreign_range (xen_xc, xen_domid,XC_PAGE_SIZE , -PROT_READ |PROT_WRITE , ioreq_pfn); +xc_map_foreign_pages (xen_xc, xen_domid,PROT_READ |PROT_WRITE , + &ioreq_pfn,1 );if (state->shared_vmport_page ==NULL ) {hw_error ("map shared vmport IO page returned error %d handle=" XC_INTERFACE_FMT , errno, xen_xc);
@@ -1261,10 +1262,9 @@ int xen_hvm_init(PCMachineState *pcms,hw_error ("get vmport regs pfn returned error %d, rc=%d" , errno, rc); } - state->buffered_io_page =xc_map_foreign_range (xen_xc, xen_domid, -XC_PAGE_SIZE , + state->buffered_io_page =xc_map_foreign_pages (xen_xc, xen_domid,PROT_READ |PROT_WRITE , - bufioreq_pfn); + &bufioreq_pfn,1 );if (state->buffered_io_page ==NULL ) {hw_error ("map buffered IO page returned error %d" , errno); }
Signature · 1 line
2.1.4
PATCH v7 5/8 xen: Switch uses of xc_map_foreign_{pages, bulk} to use libxenforeignmemory API.
In reply to Ian CampbellIn Xen 4.7 we are refactoring parts libxenctrl into a number of separate libraries which will provide backward and forward API and ABI compatiblity.
One such library will be libxenforeignmemory which provides access to privileged foreign mappings and which will provide an interface equivalent to xc_map_foreign_{pages,bulk}.
The new xenforeignmemory_map() function behaves like xc_map_foreign_pages() when the err argument is NULL and like xc_map_foreign_bulk() when err is non-NULL, which maps into the shim here onto checking err == NULL and calling the appropriate old function.
Note that xenforeignmemory_map() takes the number of pages before the arrays themselves, in order to support potentially future use of variable-length-arrays in the prototype (in the future, when Xen's baseline toolchain requirements are new enough to ensure VLAs are supported).
In preparation for adding support for libxenforeignmemory add support to the <=4.0 and <=4.6 compat code in xen_common.h to allow us to switch to using the new API. These shims will disappear for versions of Xen which include libxenforeignmemory.
Since libxenforeignmemory will have its own handle type but for <= 4.6 the functionality is provided by using a libxenctrl handle we introduce a new global xen_fmem alongside the existing xen_xc. In fact we make xen_fmem a pointer to the existing xen_xc, which then works correctly with both <=4.0 (xc handle is an int) and <=4.6 (xc handle is a pointer). In the latter case xen_fmem is actually a double indirect pointer, but it all falls out in the wash.
Unlike libxenctrl libxenforeignmemory has an explicit unmap function, rather than just specifying that munmap should be used, so the unmap paths are updated to use xenforeignmemory_unmap, which is a shim for munmap on these versions of xen. The mappings in xen-hvm.c do not appear to be unmapped (which makes sense for a qemu-dm process)
In fb_disconnect this results in a change from simply mmap over the existing mapping (with an implicit munmap) to expliclty unmapping with xenforeignmemory_unmap and then mapping the required anonymous memory in the same hole. I don't think this is a problem since any other thread which was racily touching this region would already be running the risk of hitting the mapping halfway through the call. If this is thought to be a problem then we could consider adding an extra API to the libxenforeignmemory interface to replace a foreign mapping with anonymous shared memory, but I'd prefer not to.
---
v7: Move two copies of compat xenforeignmemory_map to a common location.
Note that the existing xen_domain_create #ifdef will be covered by a CONFIG_XEN_PV_DOMAIN_BUILD in a later patch, and so is not a suitable place to put this function.
v6: Handle _pages as well as _bulk, due to changes in the previous
patches, including the dropping of "xen: Switch uses of xc_map_foreign_pages into xc_map_foreign_bulk" which previous preceded this patch and the change of "xen: Switch uses of xc_map_foreign_range into xc_map_foreign_bulk" into "xen: Switch uses of xc_map_foreign_range into xc_map_foreign_pages".
Handle reordering of arguments to xenforeignmemory_map().
Dropped Stefano's Reviewed-by due to these changes.
v4: Rebase onto "xen_console: correctly cleanup primary console on
teardown."
xenforeignmemory_unmap takes pages not bytes
Compat wrapper for xenforeignmemory_open instead of ifdef in code.
Run check patch and fix most issues. I did not fix:
ERROR: do not initialise globals to 0 or NULL
+xenforeignmemory_handle *xen_fmem = NULL;
=> This is consistent with all of the existing declarations.
ERROR: need consistent spacing around '*' (ctx:WxV) +typedef xc_interface *xenforeignmemory_handle;
=> I think this is a false +ve since this is a pointer "*" not a multiple "*".
reorder args to xenforeignmemory_map
--- hw/char/xen_console.c | 8 ++++---- hw/display/xenfb.c | 17 +++++++++-------- hw/xen/xen_backend.c | 3 ++- include/hw/xen/xen_backend.h | 1 + include/hw/xen/xen_common.h | 23 +++++++++++++++++++++++ xen-common.c | 6 ++++++ xen-hvm.c | 12 ++++++------ xen-mapcache.c | 6 +++--- 8 files changed, 54 insertions(+), 22 deletions(-)
hw/char/xen_console.c +4 -4
@@ -229,9 +229,9 @@ static int con_initialise(struct XenDevice *xendev)if (!xendev->dev) {xen_pfn_t mfn = con->ring_ref; - con->sring =xc_map_foreign_pages (xen_xc, con->xendev.dom, -PROT_READ |PROT_WRITE , - &mfn,1 ); + con->sring =xenforeignmemory_map (xen_fmem, con->xendev.dom, +PROT_READ |PROT_WRITE , +1 , &mfn,NULL ); }else { con->sring = xengnttab_map_grant_ref(xendev->gnttabdev, con->xendev.dom, con->ring_ref,
@@ -273,7 +273,7 @@ static void con_disconnect(struct XenDevice *xendev)if (con->sring) {if (!xendev->dev) { -munmap (con->sring,XC_PAGE_SIZE ); +xenforeignmemory_unmap (xen_fmem, con->sring,1 ); }else {xengnttab_unmap (xendev->gnttabdev, con->sring,1 ); }
hw/display/xenfb.c +9 -8
@@ -106,8 +106,8 @@ static int common_bind(struct common *c)if (xenstore_read_fe_int (&c->xendev,"event-channel" , &c->xendev.remote_port) ==-1 )return -1 ; - c->page =xc_map_foreign_pages (xen_xc, c->xendev.dom, -PROT_READ |PROT_WRITE , &mfn,1 ); + c->page =xenforeignmemory_map (xen_fmem, c->xendev.dom, +PROT_READ |PROT_WRITE ,1 , &mfn,NULL );if (c->page ==NULL )return -1 ;
@@ -122,7 +122,7 @@ static void common_unbind(struct common *c) {xen_be_unbind_evtchn (&c->xendev);if (c->page) { -munmap (c->page,XC_PAGE_SIZE ); +xenforeignmemory_unmap (xen_fmem, c->page,1 ); c->page =NULL ; } }
@@ -495,15 +495,15 @@ static int xenfb_map_fb(struct XenFB *xenfb) fbmfns =g_malloc0 (sizeof (xen_pfn_t) * xenfb->fbpages);xenfb_copy_mfns (mode, n_fbdirs, pgmfns, pd); - map =xc_map_foreign_pages (xen_xc, xenfb->c.xendev.dom, -PROT_READ , pgmfns, n_fbdirs); + map =xenforeignmemory_map (xen_fmem, xenfb->c.xendev.dom, +PROT_READ , n_fbdirs, pgmfns,NULL );if (map ==NULL ) goto out;xenfb_copy_mfns (mode, xenfb->fbpages, fbmfns, map); -munmap (map, n_fbdirs *XC_PAGE_SIZE ); +xenforeignmemory_unmap (xen_fmem, map, n_fbdirs); - xenfb->pixels =xc_map_foreign_pages (xen_xc, xenfb->c.xendev.dom, -PROT_READ , fbmfns, xenfb->fbpages); + xenfb->pixels =xenforeignmemory_map (xen_fmem, xenfb->c.xendev.dom, +PROT_READ , xenfb->fbpages, fbmfns,NULL );if (xenfb->pixels ==NULL ) goto out;
@@ -910,6 +910,7 @@ static void fb_disconnect(struct XenDevice *xendev)* Replacing the framebuffer with anonymous shared memory * instead. This releases the guest pages and keeps qemu happy. */ +xenforeignmemory_unmap (xen_fmem, fb->pixels, fb->fbpages); fb->pixels =mmap (fb->pixels, fb->fbpages *XC_PAGE_SIZE ,PROT_READ |PROT_WRITE ,MAP_SHARED |MAP_ANON ,-1 ,0 );
hw/xen/xen_backend.c +2 -1
@@ -45,6 +45,7 @@/* public */ XenXC xen_xc =XC_HANDLER_INITIAL_VALUE ; +xenforeignmemory_handle *xen_fmem =NULL ;struct xs_handle *xenstore =NULL ;const char *xen_protocol;
@@ -717,7 +718,7 @@ int xen_be_init(void)qemu_set_fd_handler (xs_fileno (xenstore), xenstore_update,NULL ,NULL ); -if (xen_xc ==XC_HANDLER_INITIAL_VALUE ) { +if (xen_xc ==XC_HANDLER_INITIAL_VALUE || xen_fmem ==NULL ) {/* Check if xen_init() have been called */ goto err; }
include/hw/xen/xen_backend.h +1 -0
@@ -57,6 +57,7 @@ struct XenDevice {/* variables */ extern XenXC xen_xc; +extern xenforeignmemory_handle *xen_fmem;extern struct xs_handle *xenstore;extern const char *xen_protocol;
include/hw/xen/xen_common.h +23 -0
@@ -41,6 +41,7 @@ static inline void *xc_map_foreign_bulk(int xc_handle, uint32_t dom, int prot,typedef int XenXC ;typedef int xenevtchn_handle ;typedef int xengnttab_handle ; +typedef int xenforeignmemory_handle ;# define XC_INTERFACE_FMT "%i"# define XC_HANDLER_INITIAL_VALUE -1
@@ -104,6 +105,10 @@ static inline XenXC xen_xc_interface_open(void *logger, void *dombuild_logger,return xc_interface_open (); } +#define xenforeignmemory_open (l, f) &xen_xc +/* See below for xenforeignmemory_map */ +#define xenforeignmemory_unmap (h, p, s) munmap(p, s * XC_PAGE_SIZE) +static inline int xc_fd (int xen_xc) {return xen_xc;
@@ -149,6 +154,7 @@ static inline void xs_close(struct xs_handle *xsh)#else typedef xc_interface *XenXC ; +typedef xc_interface *xenforeignmemory_handle ;typedef xc_evtchn xenevtchn_handle ;typedef xc_gnttab xengnttab_handle ;
@@ -178,6 +184,10 @@ static inline XenXC xen_xc_interface_open(void *logger, void *dombuild_logger,return xc_interface_open (logger, dombuild_logger, open_flags); } +#define xenforeignmemory_open (l, f) &xen_xc +/* See below for xenforeignmemory_map */ +#define xenforeignmemory_unmap (h, p, s) munmap(p, s * XC_PAGE_SIZE) +/* FIXME There is now way to have the xen fd */ static inline int xc_fd (xc_interface *xen_xc) {
@@ -501,4 +511,17 @@ static inline int xen_domain_create(XenXC xc, uint32_t ssidref, }#endif +#if CONFIG_XEN_CTRL_INTERFACE_VERSION <470 +static inline void *xenforeignmemory_map (XenXC *h,uint32_t dom, +int prot,size_t pages, +const xen_pfn_t arr[/*pages*/ ], +int err[/*pages*/ ]) +{ +if (err) +return xc_map_foreign_bulk (*h, dom, prot, arr, err, pages); +else +return xc_map_foreign_pages (*h, dom, prot, arr, pages); +} +#endif +#endif /* QEMU_HW_XEN_COMMON_H */
xen-common.c +6 -0
@@ -118,6 +118,12 @@ static int xen_init(MachineState *ms)xen_be_printf (NULL ,0 ,"can't open xen interface\n" );return -1 ; } + xen_fmem =xenforeignmemory_open (0 ,0 ); +if (xen_fmem ==NULL ) { +xen_be_printf (NULL ,0 ,"can't open xen fmem interface\n" ); +xc_interface_close (xen_xc); +return -1 ; + }qemu_add_vm_change_state_handler (xen_change_state_handler,NULL );global_state_set_optional ();
xen-hvm.c +6 -6
@@ -1240,9 +1240,9 @@ int xen_hvm_init(PCMachineState *pcms,DPRINTF ("buffered io page at pfn %lx\n" , bufioreq_pfn);DPRINTF ("buffered io evtchn is %x\n" , bufioreq_evtchn); - state->shared_page =xc_map_foreign_pages (xen_xc, xen_domid, + state->shared_page =xenforeignmemory_map (xen_fmem, xen_domid,PROT_READ |PROT_WRITE , - &ioreq_pfn,1 ); +1 , &ioreq_pfn,NULL );if (state->shared_page ==NULL ) {hw_error ("map shared IO page returned error %d handle=" XC_INTERFACE_FMT , errno, xen_xc);
@@ -1252,8 +1252,8 @@ int xen_hvm_init(PCMachineState *pcms,if (!rc) {DPRINTF ("shared vmport page at pfn %lx\n" , ioreq_pfn); state->shared_vmport_page = -xc_map_foreign_pages (xen_xc, xen_domid,PROT_READ |PROT_WRITE , - &ioreq_pfn,1 ); +xenforeignmemory_map (xen_fmem, xen_domid,PROT_READ |PROT_WRITE , +1 , &ioreq_pfn,NULL );if (state->shared_vmport_page ==NULL ) {hw_error ("map shared vmport IO page returned error %d handle=" XC_INTERFACE_FMT , errno, xen_xc);
@@ -1262,9 +1262,9 @@ int xen_hvm_init(PCMachineState *pcms,hw_error ("get vmport regs pfn returned error %d, rc=%d" , errno, rc); } - state->buffered_io_page =xc_map_foreign_pages (xen_xc, xen_domid, + state->buffered_io_page =xenforeignmemory_map (xen_fmem, xen_domid,PROT_READ |PROT_WRITE , - &bufioreq_pfn,1 ); +1 , &bufioreq_pfn,NULL );if (state->buffered_io_page ==NULL ) {hw_error ("map buffered IO page returned error %d" , errno); }
xen-mapcache.c +3 -3
@@ -176,10 +176,10 @@ static void xen_remap_bucket(MapCacheEntry *entry, pfns[i] = (address_index << (MCACHE_BUCKET_SHIFT -XC_PAGE_SHIFT )) + i; } - vaddr_base =xc_map_foreign_bulk (xen_xc, xen_domid,PROT_READ |PROT_WRITE , - pfns, err, nb_pfn); + vaddr_base =xenforeignmemory_map (xen_fmem, xen_domid,PROT_READ |PROT_WRITE , + nb_pfn, pfns, err);if (vaddr_base ==NULL ) { -perror ("xc_map_foreign_bulk" ); +perror ("xenforeignmemory_map" );exit (-1 ); }
Signature · 1 line
2.1.4
Re: [PATCH QEMU-XEN v7 5/8] xen: Switch uses of xc_map_foreign_{pages, bulk} to use libxenforeignmemory API.
Quoted 83 lines · Ian Campbell
In Xen 4.7 we are refactoring parts libxenctrl into a number of separate libraries which will provide backward and forward API and ABI compatiblity.
One such library will be libxenforeignmemory which provides access to privileged foreign mappings and which will provide an interface equivalent to xc_map_foreign_{pages,bulk}.
The new
xenforeignmemory_map()function behaves likexc_map_foreign_pages()when the err argument is NULL and likexc_map_foreign_bulk()when err is non-NULL, which maps into the shim here onto checking err == NULL and calling the appropriate old function.Note that
xenforeignmemory_map()takes the number of pages before the arrays themselves, in order to support potentially future use of variable-length-arrays in the prototype (in the future, when Xen's baseline toolchain requirements are new enough to ensure VLAs are supported).In preparation for adding support for libxenforeignmemory add support to the <=4.0 and <=4.6 compat code in
xen_common.hto allow us to switch to using the new API. These shims will disappear for versions of Xen which include libxenforeignmemory.Since libxenforeignmemory will have its own handle type but for <= 4.6 the functionality is provided by using a libxenctrl handle we introduce a new global
xen_fmemalongside the existingxen_xc. In fact we makexen_fmema pointer to the existingxen_xc, which then works correctly with both <=4.0 (xc handle is an int) and <=4.6 (xc handle is a pointer). In the latter casexen_fmemis actually a double indirect pointer, but it all falls out in the wash.Unlike libxenctrl libxenforeignmemory has an explicit unmap function, rather than just specifying that munmap should be used, so the unmap paths are updated to use
xenforeignmemory_unmap, which is a shim for munmap on these versions of xen. The mappings inxen-hvm.cdo not appear to be unmapped (which makes sense for a qemu-dm process)In
fb_disconnectthis results in a change from simply mmap over the existing mapping (with an implicit munmap) to expliclty unmapping withxenforeignmemory_unmapand then mapping the required anonymous memory in the same hole. I don't think this is a problem since any other thread which was racily touching this region would already be running the risk of hitting the mapping halfway through the call. If this is thought to be a problem then we could consider adding an extra API to the libxenforeignmemory interface to replace a foreign mapping with anonymous shared memory, but I'd prefer not to.Signed-off-by Ian Campbell <[email protected]>include/hw/xen/xen_common.h +6
-0@@ -41,6 +41,7 @@ static inline void *xc_map_foreign_bulk(int xc_handle, uint32_t dom, int prot,typedef int XenXC ;typedef int xenevtchn_handle ;typedef int xengnttab_handle ; +typedef int xenforeignmemory_handle ;# define XC_INTERFACE_FMT "%i"# define XC_HANDLER_INITIAL_VALUE -1@@ -104,6 +105,10 @@ static inline XenXC xen_xc_interface_open(void *logger, void *dombuild_logger,return xc_interface_open (); } +#define xenforeignmemory_open (l, f) &xen_xc +/* See below for xenforeignmemory_map */ +#define xenforeignmemory_unmap (h, p, s) munmap(p, s * XC_PAGE_SIZE) +static inline int xc_fd (int xen_xc) {return xen_xc;@@ -149,6 +154,7 @@ static inline void xs_close(struct xs_handle *xsh)#else typedef xc_interface *XenXC ; +typedef xc_interface *xenforeignmemory_handle ;typedef xc_evtchn xenevtchn_handle ;typedef xc_gnttab xengnttab_handle ;
include/hw/xen/xen_common.h static inline XenXC xen_xc_interface_open(void *logger, void *dombuild_logger, · line 193
Quoted 10 lines
include/hw/xen/xen_common.h +4
-0@@ -178,6 +184,10 @@ static inline XenXC xen_xc_interface_open(void *logger, void *dombuild_logger,return xc_interface_open (logger, dombuild_logger, open_flags); } +#define xenforeignmemory_open (l, f) &xen_xc +/* See below for xenforeignmemory_map */ +#define xenforeignmemory_unmap (h, p, s) munmap(p, s * XC_PAGE_SIZE) +/* FIXME There is now way to have the xen fd */ static inline int xc_fd (xc_interface *xen_xc) {
@@ -501,4 +511,17 @@ static inline int xen_domain_create(XenXC xc, uint32_t ssidref,
Quoted 5 lines
}
#endifinclude/hw/xen/xen_common.h +2
-0+#if CONFIG_XEN_CTRL_INTERFACE_VERSION <470 +static inline void *xenforeignmemory_map(XenXC *h, uint32_t dom,
include/hw/xen/xen_common.h static inline int xen_domain_create(XenXC xc, uint32_t ssidref, · line 525
Quoted 10 lines
include/hw/xen/xen_common.h +10
-0+ int prot, size_t pages, + const xen_pfn_t arr[/*pages*/], + int err[/*pages*/]) +{ + if (err) + return xc_map_foreign_bulk(*h, dom, prot, arr, err, pages); + else + return xc_map_foreign_pages(*h, dom, prot, arr, pages); +} +#endif
Why not move the definition of xenforeignmemory_open and xenforeignmemory_unmap here too?
Re: [Qemu-devel] [PATCH QEMU-XEN v7 5/8] xen: Switch uses of xc_map_foreign_{pages, bulk} to use libxenforeignmemory API.
In reply to Ian CampbellQuoted 83 lines · Ian Campbell
In Xen 4.7 we are refactoring parts libxenctrl into a number of separate libraries which will provide backward and forward API and ABI compatiblity.
One such library will be libxenforeignmemory which provides access to privileged foreign mappings and which will provide an interface equivalent to xc_map_foreign_{pages,bulk}.
The new
xenforeignmemory_map()function behaves likexc_map_foreign_pages()when the err argument is NULL and likexc_map_foreign_bulk()when err is non-NULL, which maps into the shim here onto checking err == NULL and calling the appropriate old function.Note that
xenforeignmemory_map()takes the number of pages before the arrays themselves, in order to support potentially future use of variable-length-arrays in the prototype (in the future, when Xen's baseline toolchain requirements are new enough to ensure VLAs are supported).In preparation for adding support for libxenforeignmemory add support to the <=4.0 and <=4.6 compat code in
xen_common.hto allow us to switch to using the new API. These shims will disappear for versions of Xen which include libxenforeignmemory.Since libxenforeignmemory will have its own handle type but for <= 4.6 the functionality is provided by using a libxenctrl handle we introduce a new global
xen_fmemalongside the existingxen_xc. In fact we makexen_fmema pointer to the existingxen_xc, which then works correctly with both <=4.0 (xc handle is an int) and <=4.6 (xc handle is a pointer). In the latter casexen_fmemis actually a double indirect pointer, but it all falls out in the wash.Unlike libxenctrl libxenforeignmemory has an explicit unmap function, rather than just specifying that munmap should be used, so the unmap paths are updated to use
xenforeignmemory_unmap, which is a shim for munmap on these versions of xen. The mappings inxen-hvm.cdo not appear to be unmapped (which makes sense for a qemu-dm process)In
fb_disconnectthis results in a change from simply mmap over the existing mapping (with an implicit munmap) to expliclty unmapping withxenforeignmemory_unmapand then mapping the required anonymous memory in the same hole. I don't think this is a problem since any other thread which was racily touching this region would already be running the risk of hitting the mapping halfway through the call. If this is thought to be a problem then we could consider adding an extra API to the libxenforeignmemory interface to replace a foreign mapping with anonymous shared memory, but I'd prefer not to.Signed-off-by Ian Campbell <[email protected]>include/hw/xen/xen_common.h +6
-0@@ -41,6 +41,7 @@ static inline void *xc_map_foreign_bulk(int xc_handle, uint32_t dom, int prot,typedef int XenXC ;typedef int xenevtchn_handle ;typedef int xengnttab_handle ; +typedef int xenforeignmemory_handle ;# define XC_INTERFACE_FMT "%i"# define XC_HANDLER_INITIAL_VALUE -1@@ -104,6 +105,10 @@ static inline XenXC xen_xc_interface_open(void *logger, void *dombuild_logger,return xc_interface_open (); } +#define xenforeignmemory_open (l, f) &xen_xc +/* See below for xenforeignmemory_map */ +#define xenforeignmemory_unmap (h, p, s) munmap(p, s * XC_PAGE_SIZE) +static inline int xc_fd (int xen_xc) {return xen_xc;@@ -149,6 +154,7 @@ static inline void xs_close(struct xs_handle *xsh)#else typedef xc_interface *XenXC ; +typedef xc_interface *xenforeignmemory_handle ;typedef xc_evtchn xenevtchn_handle ;typedef xc_gnttab xengnttab_handle ;
include/hw/xen/xen_common.h static inline XenXC xen_xc_interface_open(void *logger, void *dombuild_logger, · line 193
Quoted 10 lines
include/hw/xen/xen_common.h +4
-0@@ -178,6 +184,10 @@ static inline XenXC xen_xc_interface_open(void *logger, void *dombuild_logger,return xc_interface_open (logger, dombuild_logger, open_flags); } +#define xenforeignmemory_open (l, f) &xen_xc +/* See below for xenforeignmemory_map */ +#define xenforeignmemory_unmap (h, p, s) munmap(p, s * XC_PAGE_SIZE) +/* FIXME There is now way to have the xen fd */ static inline int xc_fd (xc_interface *xen_xc) {
@@ -501,4 +511,17 @@ static inline int xen_domain_create(XenXC xc, uint32_t ssidref,
Quoted 5 lines
}
#endifinclude/hw/xen/xen_common.h +2
-0+#if CONFIG_XEN_CTRL_INTERFACE_VERSION <470 +static inline void *xenforeignmemory_map(XenXC *h, uint32_t dom,
include/hw/xen/xen_common.h static inline int xen_domain_create(XenXC xc, uint32_t ssidref, · line 525
Quoted 10 lines
include/hw/xen/xen_common.h +10
-0+ int prot, size_t pages, + const xen_pfn_t arr[/*pages*/], + int err[/*pages*/]) +{ + if (err) + return xc_map_foreign_bulk(*h, dom, prot, arr, err, pages); + else + return xc_map_foreign_pages(*h, dom, prot, arr, pages); +} +#endif
Why not move the definition of xenforeignmemory_open and xenforeignmemory_unmap here too?
Re: [PATCH QEMU-XEN v7 5/8] xen: Switch uses of xc_map_foreign_{pages, bulk} to use libxenforeignmemory API.
Quoted 3 lines · Stefano Stabellini
Why not move the definition ofxenforeignmemory_openandxenforeignmemory_unmaphere too?
I failed to spot they were also the same. Will do.
Ian.
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Re: [Qemu-devel] [PATCH QEMU-XEN v7 5/8] xen: Switch uses of xc_map_foreign_{pages, bulk} to use libxenforeignmemory API.
In reply to Stefano StabelliniQuoted 3 lines · Stefano Stabellini
Why not move the definition ofxenforeignmemory_openandxenforeignmemory_unmaphere too?
I failed to spot they were also the same. Will do.
Ian.
PATCH v7 6/8 xen: Use stable library interfaces when they are available.
In reply to Ian CampbellIn Xen 4.7 we are refactoring parts libxenctrl into a number of separate libraries which will provide backward and forward API and ABI compatiblity.
Specifically libxenevtchn, libxengnttab and libxenforeignmemory.
Previous patches have already laid the groundwork for using these by switching the existing compatibility shims to reflect the intefaces to these libraries.
So all which remains is to update configure to detect the libraries and enable their use. Although they are notionally independent we take an all or nothing approach to the three libraries since they were added at the same time.
The only non-obvious bit is that we now open a proper xenforeignmemory handle for xen_fmem instead of reusing the xen_xc handle.
Build tested with 4.0 .. 4.6 (inclusive) and the patches targetting 4.7 which adds these libraries.
---
v6: Two minor formatting things.
Rebase onto "xen: fix usage of xc_domain_create in domain builder", required adjusting the configure script changes.
The rebase wasn't entirely trivial (semantically), so dropped Stefano's reviwed by.
v5: Remove ifdef check when undeffing the compat stuff.
s/now way/no way/
v4: xenforeignmemory_open is now a compat wrapper, so no ifdef.
Simplify configury by asserting that interface version 470 will always have the libraries (lack of them makes it 460).
Ran checkpatch and fixed everything except:
ERROR: need consistent spacing around '*' (ctx:WxV) +typedef xc_interface *XenXC;
Which I think is a false +ve.
Simpler configure stuff
--- configure | 42 +++++++++++++++++++++++++++++++++++++++++- include/hw/xen/xen_common.h | 35 +++++++++++++++++++++++++++++++++-- 2 files changed, 74 insertions(+), 3 deletions(-)
configure +41 -1
@@ -1938,6 +1938,7 @@ fi if test "$xen" != "no" ; then xen_libs="-lxenstore -lxenctrl -lxenguest" + xen_stable_libs="-lxenforeignmemory -lxengnttab -lxenevtchn" # First we test whether Xen headers and libraries are available. # If no, we are done and there is no Xen support.
@@ -1960,16 +1961,52 @@ EOF # Xen unstable elif cat > $TMPC <<EOF && +/* + * If we have stable libs the we don't want the libxc compat + * layers, regardless of what CFLAGS we may have been given. + */ +#undef XC_WANT_COMPAT_EVTCHN_API +#undef XC_WANT_COMPAT_GNTTAB_API +#undef XC_WANT_COMPAT_MAP_FOREIGN_API #include <xenctrl.h> +#include <xenstore.h> +#include <xenevtchn.h> +#include <xengnttab.h> +#include <xenforeignmemory.h> #include <stdint.h> +#include <xen/hvm/hvm_info_table.h> +#if !defined(HVM_MAX_VCPUS) +# error HVM_MAX_VCPUS not defined +#endif int main(void) { xc_interface *xc = NULL; + xenforeignmemory_handle *xfmem; + xenevtchn_handle *xe; + xengnttab_handle *xg; xen_domain_handle_t handle; + + xs_daemon_open(); + + xc = xc_interface_open(0, 0, 0); + xc_hvm_set_mem_type(0, 0, HVMMEM_ram_ro, 0, 0); + xc_domain_add_to_physmap(0, 0, XENMAPSPACE_gmfn, 0, 0); + xc_hvm_inject_msi(xc, 0, 0xf0000000, 0x00000000); + xc_hvm_create_ioreq_server(xc, 0, HVM_IOREQSRV_BUFIOREQ_ATOMIC, NULL); xc_domain_create(xc, 0, handle, 0, NULL, NULL); + + xfmem = xenforeignmemory_open(0, 0); + xenforeignmemory_map(xfmem, 0, 0, 0, 0, 0); + + xe = xenevtchn_open(0, 0); + xenevtchn_fd(xe); + + xg = xengnttab_open(0, 0); + xengnttab_map_grant_ref(xg, 0, 0, 0); + return 0; } EOF - compile_prog "" "$xen_libs" + compile_prog "" "$xen_libs $xen_stable_libs" then xen_ctrl_version=470 xen=yes
@@ -2153,6 +2190,9 @@ EOF fi if test "$xen" = yes; then + if test $xen_ctrl_version -ge 470 ; then + libs_softmmu="$xen_stable_libs $libs_softmmu" + fi libs_softmmu="$xen_libs $libs_softmmu" fi fi
include/hw/xen/xen_common.h +33 -2
@@ -6,6 +6,15 @@#include <stddef.h> #include <inttypes.h> +/* +* If we have new enough libxenctrl then we do not want/need these compat +* interfaces, despite what the user supplied cflags might say. They +* must be undefined before including xenctrl.h +*/ +#undef XC_WANT_COMPAT_EVTCHN_API +#undef XC_WANT_COMPAT_GNTTAB_API +#undef XC_WANT_COMPAT_MAP_FOREIGN_API +#include <xenctrl.h> #if CONFIG_XEN_CTRL_INTERFACE_VERSION <420 # include <xs.h>
@@ -150,8 +159,8 @@ static inline void xs_close(struct xs_handle *xsh) } -/* Xen 4.1 */ -#else +/* Xen 4.1 thru 4.6 */ +#elif CONFIG_XEN_CTRL_INTERFACE_VERSION < 470typedef xc_interface *XenXC ;typedef xc_interface *xenforeignmemory_handle ;
@@ -188,6 +197,28 @@ static inline XenXC xen_xc_interface_open(void *logger, void *dombuild_logger,/* See below for xenforeignmemory_map */ #define xenforeignmemory_unmap (h, p, s) munmap(p, s * XC_PAGE_SIZE) +/* FIXME There is no way to have the xen fd */ +static inline int xc_fd (xc_interface *xen_xc) +{ +return -1 ; +} +#else /* CONFIG_XEN_CTRL_INTERFACE_VERSION >= 470 */ + +typedef xc_interface *XenXC ; + +# define XC_INTERFACE_FMT "%p" +# define XC_HANDLER_INITIAL_VALUE NULL + +#include <xenevtchn.h> +#include <xengnttab.h> +#include <xenforeignmemory.h> + +static inline XenXC xen_xc_interface_open (void *logger,void *dombuild_logger, +unsigned int open_flags) +{ +return xc_interface_open (logger, dombuild_logger, open_flags); +} +/* FIXME There is now way to have the xen fd */ static inline int xc_fd (xc_interface *xen_xc) {
Signature · 1 line
2.1.4
PATCH v7 7/8 xen: domainbuild: reopen libxenctrl interface after forking for domain watcher.
In reply to Ian CampbellUsing an existing libxenctrl handle after a fork was never particularly safe (especially if foreign mappings existed at the time of the fork) and the xc fd has been unavailable for many releases.
Reopen the handle after fork and therefore do away with xc_fd().
---
The fact that xc_fd hasn't been useful since at least Xen 4.1 makes me question the utility of this domainbuild in QEMU. Perhaps we should just nuke it?
--- hw/xenpv/xen_domainbuild.c | 9 ++++++--- include/hw/xen/xen_common.h | 17 ----------------- 2 files changed, 6 insertions(+), 20 deletions(-)
hw/xenpv/xen_domainbuild.c +6 -3
@@ -174,12 +174,15 @@ static int xen_domain_watcher(void)for (i =3 ; i < n; i++) {if (i == fd[0 ])continue ; -if (i ==xc_fd (xen_xc)) { -continue ; - }close (i); } +/* +* Reopen xc interface, since the original is unsafe after fork +* and was closed above. +*/ + xen_xc =xc_interface_open (0 ,0 ,0 ); +/* ignore term signals */ signal (SIGINT ,SIG_IGN );signal (SIGTERM ,SIG_IGN );
include/hw/xen/xen_common.h +0 -17
@@ -118,12 +118,6 @@ static inline XenXC xen_xc_interface_open(void *logger, void *dombuild_logger,/* See below for xenforeignmemory_map */ #define xenforeignmemory_unmap (h, p, s) munmap(p, s * XC_PAGE_SIZE) -static inline int xc_fd (int xen_xc) -{ -return xen_xc; -} - -static inline int xc_domain_populate_physmap_exact (XenXC xc_handle,uint32_t domid,unsigned long nr_extents,unsigned int extent_order,unsigned int mem_flags,xen_pfn_t *extent_start)
@@ -197,11 +191,6 @@ static inline XenXC xen_xc_interface_open(void *logger, void *dombuild_logger,/* See below for xenforeignmemory_map */ #define xenforeignmemory_unmap (h, p, s) munmap(p, s * XC_PAGE_SIZE) -/* FIXME There is no way to have the xen fd */ -static inline int xc_fd (xc_interface *xen_xc) -{ -return -1 ; -}#else /* CONFIG_XEN_CTRL_INTERFACE_VERSION >= 470 */ typedef xc_interface *XenXC ;
@@ -218,12 +207,6 @@ static inline XenXC xen_xc_interface_open(void *logger, void *dombuild_logger, {return xc_interface_open (logger, dombuild_logger, open_flags); } - -/* FIXME There is now way to have the xen fd */ -static inline int xc_fd (xc_interface *xen_xc) -{ -return -1 ; -}#endif /* Xen before 4.2 */
Signature · 1 line
2.1.4
PATCH v7 8/8 xen: make it possible to build without the Xen PV domain builder
In reply to Ian CampbellUntil the previous patch this relied on xc_fd(), which was only implemented for Xen 4.0 and earlier.
Given this wasn't working since Xen 4.0 I have marked this as disabled by default.
Removing this support drops the use of a bunch of symbols from libxenctrl, specifically:
- xc_domain_create
- xc_domain_destroy
- xc_domain_getinfo
- xc_domain_max_vcpus
- xc_domain_setmaxmem
- xc_domain_unpause
- xc_evtchn_alloc_unbound
- xc_linux_build
This is another step towards only using Xen libraries which provide a stable inteface.
---
v6: Rebase onto "xen: fix usage of xc_domain_create in domain
builder" (trivial, Reviewed-by retained)
v5: XEN_CREATE entirely wihtin CONFIG_XEN_PV_DOMAIN_BUILD ifdef.
Simplify configure'ry.
v4: Fixed all checkpatch errors.
Disabled by default.
--- configure | 15 +++++++++++++++ hw/xenpv/Makefile.objs | 4 +++- hw/xenpv/xen_machine_pv.c | 15 +++++++++++---- include/hw/xen/xen_common.h | 2 ++ 4 files changed, 31 insertions(+), 5 deletions(-)
configure +15 -0
@@ -250,6 +250,7 @@ vnc_jpeg="" vnc_png="" xen="" xen_ctrl_version="" +xen_pv_domain_build="no" xen_pci_passthrough="" linux_aio="" cap_ng=""
@@ -927,6 +928,10 @@ for opt do ;; --enable-xen-pci-passthrough) xen_pci_passthrough="yes" ;; + --disable-xen-pv-domain-build) xen_pv_domain_build="no" + ;; + --enable-xen-pv-domain-build) xen_pv_domain_build="yes" + ;; --disable-brlapi) brlapi="no" ;; --enable-brlapi) brlapi="yes"
@@ -2214,6 +2219,12 @@ if test "$xen_pci_passthrough" != "no"; then fi fi +if test "$xen_pv_domain_build" = "yes" && + test "$xen" != "yes"; then + error_exit "User requested Xen PV domain builder support" \ + "which requires Xen support." +fi + ########################################## # libtool probe
@@ -4821,6 +4832,7 @@ fi echo "xen support $xen" if test "$xen" = "yes" ; then echo "xen ctrl version $xen_ctrl_version" + echo "pv dom build $xen_pv_domain_build" fi echo "brlapi support $brlapi" echo "bluez support $bluez"
@@ -5189,6 +5201,9 @@ fi if test "$xen" = "yes" ; then echo "CONFIG_XEN_BACKEND=y" >> $config_host_mak echo "CONFIG_XEN_CTRL_INTERFACE_VERSION=$xen_ctrl_version" >> $config_host_mak + if test "$xen_pv_domain_build" = "yes" ; then + echo "CONFIG_XEN_PV_DOMAIN_BUILD=y" >> $config_host_mak + fi fi if test "$linux_aio" = "yes" ; then echo "CONFIG_LINUX_AIO=y" >> $config_host_mak
hw/xenpv/Makefile.objs +3 -1
@@ -1,2 +1,4 @@ # Xen PV machine support -obj-$(CONFIG_XEN) += xen_domainbuild.o xen_machine_pv.o +obj-$(CONFIG_XEN) += xen_machine_pv.o +# Xen PV machine builder support +obj-$(CONFIG_XEN_PV_DOMAIN_BUILD) += xen_domainbuild.o
hw/xenpv/xen_machine_pv.c +11 -4
@@ -30,9 +30,6 @@static void xen_init_pv (MachineState *machine) { -const char *kernel_filename = machine->kernel_filename; -const char *kernel_cmdline = machine->kernel_cmdline; -const char *initrd_filename = machine->initrd_filename;DriveInfo *dinfo;int i;
@@ -46,17 +43,27 @@ static void xen_init_pv(MachineState *machine)case XEN_ATTACH :/* nothing to do, xend handles everything */ break ; -case XEN_CREATE : +#ifdef CONFIG_XEN_PV_DOMAIN_BUILD +case XEN_CREATE : { +const char *kernel_filename = machine->kernel_filename; +const char *kernel_cmdline = machine->kernel_cmdline; +const char *initrd_filename = machine->initrd_filename;if (xen_domain_build_pv (kernel_filename, initrd_filename, kernel_cmdline) <0 ) {fprintf (stderr,"xen pv domain creation failed\n" );exit (1 ); }break ; + } +#endif case XEN_EMULATE :fprintf (stderr,"xen emulation not implemented (yet)\n" );exit (1 );break ; +default : +fprintf (stderr,"unhandled xen_mode %d\n" , xen_mode); +exit (1 ); +break ; }xen_be_register ("console" , &xen_console_ops);
include/hw/xen/xen_common.h +2 -0
@@ -509,6 +509,7 @@ static inline int xen_xc_domain_add_to_physmap(XenXC xch, uint32_t domid, }#endif +#ifdef CONFIG_XEN_PV_DOMAIN_BUILD #if CONFIG_XEN_CTRL_INTERFACE_VERSION <470 static inline int xen_domain_create(XenXC xc, uint32_t ssidref, xen_domain_handle_t handle, uint32_t flags,
@@ -524,6 +525,7 @@ static inline int xen_domain_create(XenXC xc, uint32_t ssidref,return xc_domain_create (xc, ssidref, handle, flags, pdomid,NULL ); }#endif +#endif #if CONFIG_XEN_CTRL_INTERFACE_VERSION <470 static inline void *xenforeignmemory_map(XenXC *h, uint32_t dom,
Signature · 1 line
2.1.4
v7 cover Begin to disentangle libxenctrl and provide some stable libraries
In reply to Ian CampbellWe intend to stabilise some parts of the libxenctrl interface by splitting out some functionality into separate stable libraries.
This is the qemu-xen-traditional part of the first phase of that change.
This mail is (or is intended to be) a reply to a "0/<VARIOUS>" super-intro mail covering all of the related patch series and which contains more details.
Ian Campbell (4):
qemu-xen-traditional: Use libxenevtchn
qemu-xen-traditional: Use libxengnttab
qemu-xen-traditional: Add libxencall to rpath-link
qemu-xen-traditional: Add libxenforeignmemory to rpath-link
hw/xen_backend.c | 30 +++++++++++++++--------------- hw/xen_backend.h | 4 ++-- hw/xen_common.h | 2 ++ hw/xen_console.c | 4 ++-- hw/xen_disk.c | 24 ++++++++++++------------ i386-dm/helper2.c | 19 ++++++++++--------- xen-hooks.mak | 7 +++++++ 7 files changed, 50 insertions(+), 40 deletions(-)
Signature · 1 line
2.1.4
PATCH v7 1/4 qemu-xen-traditional: Use libxenevtchn
/dev/xen/evtchn related wrappers have been moved out of libxenctrl into their own library.
Note that i386-dm/helper2.c's xc_interface * was always really an xc_evtchn *, it's just they used to be typedefs to the same thing...
---
v3: Library moved to tools/libs/
--- hw/xen_backend.c | 26 +++++++++++++------------- hw/xen_backend.h | 2 +- hw/xen_common.h | 1 + i386-dm/helper2.c | 19 ++++++++++--------- xen-hooks.mak | 2 ++ 5 files changed, 27 insertions(+), 23 deletions(-)
hw/xen_backend.c +13 -13
@@ -208,19 +208,19 @@ static struct XenDevice *xen_be_get_xendev(const char *type, int dom, int dev, xendev->debug = debug; xendev->local_port =-1 ; - xendev->evtchndev =xc_evtchn_open (NULL ,0 ); + xendev->evtchndev =xenevtchn_open (NULL ,0 );if (xendev->evtchndev ==NULL ) {xen_be_printf (NULL ,0 ,"can't open evtchn device\n" );qemu_free (xendev);return NULL ; } -fcntl (xc_evtchn_fd (xendev->evtchndev),F_SETFD ,FD_CLOEXEC ); +fcntl (xenevtchn_fd (xendev->evtchndev),F_SETFD ,FD_CLOEXEC );if (ops->flags &DEVOPS_FLAG_NEED_GNTDEV ) { xendev->gnttabdev =xc_gnttab_open (NULL ,0 );if (xendev->gnttabdev ==NULL ) {xen_be_printf (NULL ,0 ,"can't open gnttab device\n" ); -xc_evtchn_close (xendev->evtchndev); +xenevtchn_close (xendev->evtchndev);qemu_free (xendev);return NULL ; }
@@ -268,7 +268,7 @@ static struct XenDevice *xen_be_del_xendev(int dom, int dev) }if (xendev->evtchndev !=NULL ) -xc_evtchn_close (xendev->evtchndev); +xenevtchn_close (xendev->evtchndev);if (xendev->gnttabdev !=NULL )xc_gnttab_close (xendev->gnttabdev);
@@ -630,13 +630,13 @@ static void xen_be_evtchn_event(void *opaque)struct XenDevice *xendev = opaque;evtchn_port_t port; - port =xc_evtchn_pending (xendev->evtchndev); + port =xenevtchn_pending (xendev->evtchndev);if (port != xendev->local_port) { -xen_be_printf (xendev,0 ,"xc_evtchn_pending returned %d (expected %d)\n" , +xen_be_printf (xendev,0 ,"xenevtchn_pending returned %d (expected %d)\n" , port, xendev->local_port);return ; } -xc_evtchn_unmask (xendev->evtchndev, port); +xenevtchn_unmask (xendev->evtchndev, port);if (xendev->ops->event) xendev->ops->event (xendev);
@@ -683,14 +683,14 @@ int xen_be_bind_evtchn(struct XenDevice *xendev) {if (xendev->local_port !=-1 )return 0 ; - xendev->local_port =xc_evtchn_bind_interdomain + xendev->local_port =xenevtchn_bind_interdomain (xendev->evtchndev, xendev->dom, xendev->remote_port);if (xendev->local_port ==-1 ) { -xen_be_printf (xendev,0 ,"xc_evtchn_bind_interdomain failed\n" ); +xen_be_printf (xendev,0 ,"xenevtchn_bind_interdomain failed\n" );return -1 ; }xen_be_printf (xendev,2 ,"bind evtchn port %d\n" , xendev->local_port); -qemu_set_fd_handler (xc_evtchn_fd (xendev->evtchndev), +qemu_set_fd_handler (xenevtchn_fd (xendev->evtchndev), xen_be_evtchn_event,NULL , xendev);return 0 ; }
@@ -699,15 +699,15 @@ void xen_be_unbind_evtchn(struct XenDevice *xendev) {if (xendev->local_port ==-1 )return ; -qemu_set_fd_handler (xc_evtchn_fd (xendev->evtchndev),NULL ,NULL ,NULL ); -xc_evtchn_unbind (xendev->evtchndev, xendev->local_port); +qemu_set_fd_handler (xenevtchn_fd (xendev->evtchndev),NULL ,NULL ,NULL ); +xenevtchn_unbind (xendev->evtchndev, xendev->local_port);xen_be_printf (xendev,2 ,"unbind evtchn port %d\n" , xendev->local_port); xendev->local_port =-1 ; }int xen_be_send_notify (struct XenDevice *xendev) { -return xc_evtchn_notify (xendev->evtchndev, xendev->local_port); +return xenevtchn_notify (xendev->evtchndev, xendev->local_port); }/*
hw/xen_backend.h +1 -1
@@ -44,7 +44,7 @@ struct XenDevice {int remote_port;int local_port; -xc_evtchn *evtchndev; +xenevtchn_handle *evtchndev;xc_gnttab *gnttabdev;struct XenDevOps *ops;
hw/xen_common.h +1 -0
@@ -4,6 +4,7 @@#include <stddef.h> #include <inttypes.h> +#include <xenevtchn.h> #include <xenctrl.h> #include <xenstore.h> #include <xen/io/xenbus.h>
i386-dm/helper2.c +10 -9
@@ -48,6 +48,7 @@#include <limits.h> #include <fcntl.h> +#include <xenevtchn.h> #include <xenctrl.h> #include <xen/hvm/ioreq.h> #include <xen/hvm/hvm_info_table.h>
@@ -104,7 +105,7 @@ buffered_iopage_t *buffered_io_page = NULL;QEMUTimer *buffered_io_timer;/* the evtchn fd for polling */ -xc_interface *xce_handle =NULL ; +xenevtchn_handle *xce_handle =NULL ;/* which vcpu we are serving */ int send_vcpu =0 ;
@@ -141,7 +142,7 @@ CPUX86State *cpu_x86_init(const char *cpu_model) cpu_single_env = env; - xce_handle =xc_evtchn_open (NULL ,0 ); + xce_handle =xenevtchn_open (NULL ,0 );if (xce_handle ==NULL ) {perror ("open" );return NULL ;
@@ -149,7 +150,7 @@ CPUX86State *cpu_x86_init(const char *cpu_model)/* FIXME: how about if we overflow the page here? */ for (i =0 ; i < vcpus; i++) { - rc =xc_evtchn_bind_interdomain ( + rc =xenevtchn_bind_interdomain ( xce_handle, domid, shared_page->vcpu_ioreq[i].vp_eport);if (rc ==-1 ) {fprintf (logfile,"bind interdomain ioctl error %d\n" , errno);
@@ -164,7 +165,7 @@ CPUX86State *cpu_x86_init(const char *cpu_model) errno);return NULL ; } - rc =xc_evtchn_bind_interdomain (xce_handle, domid, (uint32_t )bufioreq_evtchn); + rc =xenevtchn_bind_interdomain (xce_handle, domid, (uint32_t )bufioreq_evtchn);if (rc ==-1 ) {fprintf (logfile,"bind interdomain ioctl error %d\n" , errno);return NULL ;
@@ -278,7 +279,7 @@ static ioreq_t *cpu_get_ioreq(void)int i;evtchn_port_t port; - port =xc_evtchn_pending (xce_handle); + port =xenevtchn_pending (xce_handle);if (port == bufioreq_local_port) {qemu_mod_timer (buffered_io_timer,BUFFER_IO_MAX_DELAY +qemu_get_clock (rt_clock));
@@ -296,7 +297,7 @@ static ioreq_t *cpu_get_ioreq(void) }// unmask the wanted port again -xc_evtchn_unmask (xce_handle, port); +xenevtchn_unmask (xce_handle, port);//get the io packet from shared memory send_vcpu = i;
@@ -539,7 +540,7 @@ static void handle_buffered_io(void *opaque) BUFFER_IO_MAX_DELAY + qemu_get_clock(rt_clock)); }else {qemu_del_timer (buffered_io_timer); -xc_evtchn_unmask (xce_handle, bufioreq_local_port); +xenevtchn_unmask (xce_handle, bufioreq_local_port); } }
@@ -583,7 +584,7 @@ static void cpu_handle_ioreq(void *opaque) } req->state =STATE_IORESP_READY ; -xc_evtchn_notify (xce_handle, ioreq_local_port[send_vcpu]); +xenevtchn_notify (xce_handle, ioreq_local_port[send_vcpu]); } }
@@ -592,7 +593,7 @@ int xen_pause_requested;int main_loop (void ) {CPUState *env = cpu_single_env; -int evtchn_fd = xce_handle ==NULL ?-1 :xc_evtchn_fd (xce_handle); +int evtchn_fd = xce_handle ==NULL ?-1 :xenevtchn_fd (xce_handle);char *qemu_file;fd_set fds;
xen-hooks.mak +2 -0
@@ -1,4 +1,5 @@ CPPFLAGS+= -I$(XEN_ROOT)/tools/libs/toollog/include +CPPFLAGS+= -I$(XEN_ROOT)/tools/libs/evtchn/include CPPFLAGS+= -I$(XEN_ROOT)/tools/libxc/include CPPFLAGS+= -I$(XEN_ROOT)/tools/xenstore/include CPPFLAGS+= -I$(XEN_ROOT)/tools/include
@@ -18,6 +19,7 @@ endif CFLAGS += $(CMDLINE_CFLAGS) +LIBS += -L$(XEN_ROOT)/tools/libs/evtchn -lxenevtchn LIBS += -L$(XEN_ROOT)/tools/libxc -lxenctrl -lxenguest LIBS += -L$(XEN_ROOT)/tools/xenstore -lxenstore LIBS += -Wl,-rpath-link=$(XEN_ROOT)/tools/libs/toollog
Signature · 1 line
2.1.4
PATCH v7 2/4 qemu-xen-traditional: Use libxengnttab
In reply to Ian Campbell/dev/xen/gntdev related wrappers have been moved out of libxenctrl into their own library.
---
v3: Library moved to tools/libs/
v7: s/gnttab_munmap/gnttab_unmap/ to reflect change to the library API.
--- hw/xen_backend.c | 4 ++-- hw/xen_backend.h | 2 +- hw/xen_common.h | 1 + hw/xen_console.c | 4 ++-- hw/xen_disk.c | 24 ++++++++++++------------ xen-hooks.mak | 2 ++ 6 files changed, 20 insertions(+), 17 deletions(-)
hw/xen_backend.c +2 -2
@@ -217,7 +217,7 @@ static struct XenDevice *xen_be_get_xendev(const char *type, int dom, int dev,fcntl (xenevtchn_fd (xendev->evtchndev),F_SETFD ,FD_CLOEXEC );if (ops->flags &DEVOPS_FLAG_NEED_GNTDEV ) { - xendev->gnttabdev =xc_gnttab_open (NULL ,0 ); + xendev->gnttabdev =xengnttab_open (NULL ,0 );if (xendev->gnttabdev ==NULL ) {xen_be_printf (NULL ,0 ,"can't open gnttab device\n" );xenevtchn_close (xendev->evtchndev);
@@ -270,7 +270,7 @@ static struct XenDevice *xen_be_del_xendev(int dom, int dev)if (xendev->evtchndev !=NULL )xenevtchn_close (xendev->evtchndev);if (xendev->gnttabdev !=NULL ) -xc_gnttab_close (xendev->gnttabdev); +xengnttab_close (xendev->gnttabdev);TAILQ_REMOVE (&xendevs, xendev, next);qemu_free (xendev);
hw/xen_backend.h +1 -1
@@ -45,7 +45,7 @@ struct XenDevice {int local_port;xenevtchn_handle *evtchndev; -xc_gnttab *gnttabdev; +xengnttab_handle *gnttabdev;struct XenDevOps *ops;TAILQ_ENTRY (XenDevice) next;
hw/xen_common.h +1 -0
@@ -5,6 +5,7 @@#include <inttypes.h> #include <xenevtchn.h> +#include <xengnttab.h> #include <xenctrl.h> #include <xenstore.h> #include <xen/io/xenbus.h>
hw/xen_console.c +2 -2
@@ -230,7 +230,7 @@ static int con_initialise(struct XenDevice *xendev)PROT_READ |PROT_WRITE , con->ring_ref); else - con->sring = xc_gnttab_map_grant_ref(xendev->gnttabdev, con->xendev.dom, + con->sring = xengnttab_map_grant_ref(xendev->gnttabdev, con->xendev.dom, con->ring_ref,PROT_READ |PROT_WRITE );if (!con->sring)
@@ -263,7 +263,7 @@ static void con_disconnect(struct XenDevice *xendev)if (!xendev->gnttabdev)munmap (con->sring,XC_PAGE_SIZE );else -xc_gnttab_munmap (xendev->gnttabdev, con->sring,1 ); +xengnttab_unmap (xendev->gnttabdev, con->sring,1 ); con->sring =NULL ; } }
hw/xen_disk.c +12 -12
@@ -266,7 +266,7 @@ err:static void ioreq_unmap (struct ioreq *ioreq) { -xc_gnttab *gnt = ioreq->blkdev->xendev.gnttabdev; +xengnttab_handle *gnt = ioreq->blkdev->xendev.gnttabdev;int i;if (ioreq->v.niov ==0 )
@@ -274,8 +274,8 @@ static void ioreq_unmap(struct ioreq *ioreq)if (batch_maps) {if (!ioreq->pages)return ; -if (xc_gnttab_munmap (gnt, ioreq->pages, ioreq->v.niov) !=0 ) -xen_be_printf (&ioreq->blkdev->xendev,0 ,"xc_gnttab_munmap failed: %s\n" , +if (xengnttab_unmap (gnt, ioreq->pages, ioreq->v.niov) !=0 ) +xen_be_printf (&ioreq->blkdev->xendev,0 ,"xengnttab_unmap failed: %s\n" ,strerror (errno)); ioreq->blkdev->cnt_map -= ioreq->v.niov; ioreq->pages =NULL ;
@@ -283,8 +283,8 @@ static void ioreq_unmap(struct ioreq *ioreq)for (i =0 ; i < ioreq->v.niov; i++) {if (!ioreq->page[i])continue ; -if (xc_gnttab_munmap (gnt, ioreq->page[i],1 ) !=0 ) -xen_be_printf (&ioreq->blkdev->xendev,0 ,"xc_gnttab_munmap failed: %s\n" , +if (xengnttab_unmap (gnt, ioreq->page[i],1 ) !=0 ) +xen_be_printf (&ioreq->blkdev->xendev,0 ,"xengnttab_unmap failed: %s\n" ,strerror (errno)); ioreq->blkdev->cnt_map--; ioreq->page[i] =NULL ;
@@ -294,13 +294,13 @@ static void ioreq_unmap(struct ioreq *ioreq)static int ioreq_map (struct ioreq *ioreq) { -xc_gnttab *gnt = ioreq->blkdev->xendev.gnttabdev; +xengnttab_handle *gnt = ioreq->blkdev->xendev.gnttabdev;int i;if (ioreq->v.niov ==0 )return 0 ;if (batch_maps) { - ioreq->pages =xc_gnttab_map_grant_refs + ioreq->pages =xengnttab_map_grant_refs (gnt, ioreq->v.niov, ioreq->domids, ioreq->refs, ioreq->prot);if (ioreq->pages ==NULL ) { xen_be_printf(&ioreq->blkdev->xendev, 0,
@@ -314,7 +314,7 @@ static int ioreq_map(struct ioreq *ioreq) ioreq->blkdev->cnt_map += ioreq->v.niov; }else {for (i =0 ; i < ioreq->v.niov; i++) { - ioreq->page[i] =xc_gnttab_map_grant_ref + ioreq->page[i] =xengnttab_map_grant_ref (gnt, ioreq->domids[i], ioreq->refs[i], ioreq->prot);if (ioreq->page[i] ==NULL ) { xen_be_printf(&ioreq->blkdev->xendev, 0,
@@ -611,9 +611,9 @@ static void blk_alloc(struct XenDevice *xendev) blkdev->bh =qemu_bh_new (blk_bh, blkdev);if (xen_mode !=XEN_EMULATE ) batch_maps =1 ; -if (xc_gnttab_set_max_grants (xendev->gnttabdev, +if (xengnttab_set_max_grants (xendev->gnttabdev,MAX_GRANTS (max_requests,BLKIF_MAX_SEGMENTS_PER_REQUEST )) <0 ) { -xen_be_printf (xendev,0 ,"xc_gnttab_set_max_grants failed: %s\n" , +xen_be_printf (xendev,0 ,"xengnttab_set_max_grants failed: %s\n" ,strerror (errno)); } }
@@ -734,7 +734,7 @@ static int blk_connect(struct XenDevice *xendev) blkdev->protocol =BLKIF_PROTOCOL_X86_64 ; } - blkdev->sring =xc_gnttab_map_grant_ref (blkdev->xendev.gnttabdev, + blkdev->sring =xengnttab_map_grant_ref (blkdev->xendev.gnttabdev, blkdev->xendev.dom, blkdev->ring_ref,PROT_READ |PROT_WRITE );
@@ -787,7 +787,7 @@ static void blk_disconnect(struct XenDevice *xendev)xen_be_unbind_evtchn (&blkdev->xendev);if (blkdev->sring) { -xc_gnttab_munmap (blkdev->xendev.gnttabdev, blkdev->sring,1 ); +xengnttab_unmap (blkdev->xendev.gnttabdev, blkdev->sring,1 ); blkdev->cnt_map--; blkdev->sring =NULL ; }
xen-hooks.mak +2 -0
@@ -1,5 +1,6 @@ CPPFLAGS+= -I$(XEN_ROOT)/tools/libs/toollog/include CPPFLAGS+= -I$(XEN_ROOT)/tools/libs/evtchn/include +CPPFLAGS+= -I$(XEN_ROOT)/tools/libs/gnttab/include CPPFLAGS+= -I$(XEN_ROOT)/tools/libxc/include CPPFLAGS+= -I$(XEN_ROOT)/tools/xenstore/include CPPFLAGS+= -I$(XEN_ROOT)/tools/include
@@ -20,6 +21,7 @@ endif CFLAGS += $(CMDLINE_CFLAGS) LIBS += -L$(XEN_ROOT)/tools/libs/evtchn -lxenevtchn +LIBS += -L$(XEN_ROOT)/tools/libs/gnttab -lxengnttab LIBS += -L$(XEN_ROOT)/tools/libxc -lxenctrl -lxenguest LIBS += -L$(XEN_ROOT)/tools/xenstore -lxenstore LIBS += -Wl,-rpath-link=$(XEN_ROOT)/tools/libs/toollog
Signature · 1 line
2.1.4
PATCH v7 3/4 qemu-xen-traditional: Add libxencall to rpath-link
In reply to Ian Campbelllibxenctrl links against this library
---
v3: Library moved to tools/libs
--- xen-hooks.mak | 1 + 1 file changed, 1 insertion(+)
xen-hooks.mak +1 -0
@@ -25,6 +25,7 @@ LIBS += -L$(XEN_ROOT)/tools/libs/gnttab -lxengnttab LIBS += -L$(XEN_ROOT)/tools/libxc -lxenctrl -lxenguest LIBS += -L$(XEN_ROOT)/tools/xenstore -lxenstore LIBS += -Wl,-rpath-link=$(XEN_ROOT)/tools/libs/toollog +LIBS += -Wl,-rpath-link=$(XEN_ROOT)/tools/libs/call LDFLAGS := $(CFLAGS) $(LDFLAGS)
Signature · 1 line
2.1.4
PATCH v7 4/4 qemu-xen-traditional: Add libxenforeignmemory to rpath-link
In reply to Ian Campbelllibxenctrl links against this library.
Also, request the compat xc_map_foreign API from libxc.
---
v3: Library moved to tools/libs/
--- xen-hooks.mak | 2 ++ 1 file changed, 2 insertions(+)
xen-hooks.mak +2 -0
@@ -1,6 +1,7 @@ CPPFLAGS+= -I$(XEN_ROOT)/tools/libs/toollog/include CPPFLAGS+= -I$(XEN_ROOT)/tools/libs/evtchn/include CPPFLAGS+= -I$(XEN_ROOT)/tools/libs/gnttab/include +CPPFLAGS+= -DXC_WANT_COMPAT_MAP_FOREIGN_API CPPFLAGS+= -I$(XEN_ROOT)/tools/libxc/include CPPFLAGS+= -I$(XEN_ROOT)/tools/xenstore/include CPPFLAGS+= -I$(XEN_ROOT)/tools/include
@@ -26,6 +27,7 @@ LIBS += -L$(XEN_ROOT)/tools/libxc -lxenctrl -lxenguest LIBS += -L$(XEN_ROOT)/tools/xenstore -lxenstore LIBS += -Wl,-rpath-link=$(XEN_ROOT)/tools/libs/toollog LIBS += -Wl,-rpath-link=$(XEN_ROOT)/tools/libs/call +LIBS += -Wl,-rpath-link=$(XEN_ROOT)/tools/libs/foreignmemory LDFLAGS := $(CFLAGS) $(LDFLAGS)
Signature · 1 line
2.1.4
v7 cover Begin to disentangle libxenctrl and provide some stable libraries
In reply to Ian CampbellWe intend to stabilise some parts of the libxenctrl interface by splitting out some functionality into separate stable libraries.
This is the mini-os part of the first phase of that change.
This mail is (or is intended to be) a reply to a "0/<VARIOUS>" super-intro mail covering all of the related patch series and which contains more details.
Ian Campbell (4):
mini-os: Include libxenevtchn with libxc
mini-os: Include libxengnttab with libxc
mini-os: Include libxencall with libxc
mini-os: Include libxenforeignmemory with libxc
Makefile | 4 ++++ 1 file changed, 4 insertions(+)
Signature · 1 line
2.1.4
PATCH v7 1/4 mini-os: Include libxenevtchn with libxc
libxenevtchn has just been split out from libxc. From mini-os's point of view we don't care about the distinction, so keep things simple by just including libxenevtchn if libxc is enabled.
---
v2: Adjust for libs/$lib layout.
--- Makefile | 1 + 1 file changed, 1 insertion(+)
Makefile +1 -0
@@ -166,6 +166,7 @@ OBJS := $(filter-out $(OBJ_DIR)/lwip%.o $(LWO), $(OBJS)) ifeq ($(libc),y) ifeq ($(CONFIG_XC),y) APP_LDLIBS += -L$(XEN_ROOT)/stubdom/libs-$(MINIOS_TARGET_ARCH)/toollog -whole-archive -lxentoollog -no-whole-archive +APP_LDLIBS += -L$(XEN_ROOT)/stubdom/libs-$(MINIOS_TARGET_ARCH)/evtchn -whole-archive -lxenevtchn -no-whole-archive APP_LDLIBS += -L$(XEN_ROOT)/stubdom/libxc-$(MINIOS_TARGET_ARCH) -whole-archive -lxenguest -lxenctrl -no-whole-archive endif APP_LDLIBS += -lpci
Signature · 1 line
2.1.4
PATCH v7 2/4 mini-os: Include libxengnttab with libxc
In reply to Ian Campbelllibxengnttab has just been split out from libxc. From mini-os's point of view we don't care about the distinction, so keep things simple by just including libxengnttab if libxc is enabled.
---
v2: Adjust for libs/$lib layout.
--- Makefile | 1 + 1 file changed, 1 insertion(+)
Makefile +1 -0
@@ -167,6 +167,7 @@ ifeq ($(libc),y) ifeq ($(CONFIG_XC),y) APP_LDLIBS += -L$(XEN_ROOT)/stubdom/libs-$(MINIOS_TARGET_ARCH)/toollog -whole-archive -lxentoollog -no-whole-archive APP_LDLIBS += -L$(XEN_ROOT)/stubdom/libs-$(MINIOS_TARGET_ARCH)/evtchn -whole-archive -lxenevtchn -no-whole-archive +APP_LDLIBS += -L$(XEN_ROOT)/stubdom/libs-$(MINIOS_TARGET_ARCH)/gnttab -whole-archive -lxengnttab -no-whole-archive APP_LDLIBS += -L$(XEN_ROOT)/stubdom/libxc-$(MINIOS_TARGET_ARCH) -whole-archive -lxenguest -lxenctrl -no-whole-archive endif APP_LDLIBS += -lpci
Signature · 1 line
2.1.4
PATCH v7 3/4 mini-os: Include libxencall with libxc
In reply to Ian Campbelllibxencall has just been split out from libxc. From mini-os's point of view we don't care about the distinction, so keep things simple by just including libxencall if libxc is enabled.
---
v2: Adjust for libs/$lib layout.
--- Makefile | 1 + 1 file changed, 1 insertion(+)
Makefile +1 -0
@@ -168,6 +168,7 @@ ifeq ($(CONFIG_XC),y) APP_LDLIBS += -L$(XEN_ROOT)/stubdom/libs-$(MINIOS_TARGET_ARCH)/toollog -whole-archive -lxentoollog -no-whole-archive APP_LDLIBS += -L$(XEN_ROOT)/stubdom/libs-$(MINIOS_TARGET_ARCH)/evtchn -whole-archive -lxenevtchn -no-whole-archive APP_LDLIBS += -L$(XEN_ROOT)/stubdom/libs-$(MINIOS_TARGET_ARCH)/gnttab -whole-archive -lxengnttab -no-whole-archive +APP_LDLIBS += -L$(XEN_ROOT)/stubdom/libs-$(MINIOS_TARGET_ARCH)/call -whole-archive -lxencall -no-whole-archive APP_LDLIBS += -L$(XEN_ROOT)/stubdom/libxc-$(MINIOS_TARGET_ARCH) -whole-archive -lxenguest -lxenctrl -no-whole-archive endif APP_LDLIBS += -lpci
Signature · 1 line
2.1.4
PATCH v7 4/4 mini-os: Include libxenforeignmemory with libxc
In reply to Ian Campbelllibxenforeignmemory has just been split out from libxc. From mini-os's point of view we don't care about the distinction, so keep things simple by just including libxenforeignmemory if libxc is enabled.
---
v2: Adjust for libs/$lib layout.
--- Makefile | 1 + 1 file changed, 1 insertion(+)
Makefile +1 -0
@@ -169,6 +169,7 @@ APP_LDLIBS += -L$(XEN_ROOT)/stubdom/libs-$(MINIOS_TARGET_ARCH)/toollog -whole-ar APP_LDLIBS += -L$(XEN_ROOT)/stubdom/libs-$(MINIOS_TARGET_ARCH)/evtchn -whole-archive -lxenevtchn -no-whole-archive APP_LDLIBS += -L$(XEN_ROOT)/stubdom/libs-$(MINIOS_TARGET_ARCH)/gnttab -whole-archive -lxengnttab -no-whole-archive APP_LDLIBS += -L$(XEN_ROOT)/stubdom/libs-$(MINIOS_TARGET_ARCH)/call -whole-archive -lxencall -no-whole-archive +APP_LDLIBS += -L$(XEN_ROOT)/stubdom/libs-$(MINIOS_TARGET_ARCH)/foreignmemory -whole-archive -lxenforeignmemory -no-whole-archive APP_LDLIBS += -L$(XEN_ROOT)/stubdom/libxc-$(MINIOS_TARGET_ARCH) -whole-archive -lxenguest -lxenctrl -no-whole-archive endif APP_LDLIBS += -lpci
Signature · 1 line
2.1.4