FIXES for pnfs for 2.6.40 - version 9

Hi

I've re-rebased all the fixes in their intended place and cut a tree on the git.open-osd.org git tree. (some base patches changed do to conflicts with previous squashmes)

I have structured the above git tree as follows:
v2.6.39

	pnfs-submit----|
                       +---merge_and_compile
	pnfsd-exofs----|

So both client and server branches are based on Linus tree and are conveniently merged in *merge_and_compile* for actual testing of the code.

Benny please compare your final branch with the *pnfs-submit* branch to make sure nothing is missing.

tree is at: git://git.open-osd.org/linux-open-osd.git
pnfs-submit pnfsd-exofs & merge_and_compile branches

[On the web:
http://git.open-osd.org/gitweb.cgi?p=linux-open-osd.git;a=shortlog;h=refs/heads/merge_and_compile
]

I have left in the SQUASHME patches (And resending them in their mergeable form, as reply to this set)

Here are the patches in pnfs-submit (rebase order)
(I have removed the two server patches from the pnfs-submit branch)

git log --oneline --reverse v.2.6.39..pnfs-submit:

3b6445a NFSv4.1: fix typo in filelayout_check_layout
67d51f6 NFSv4.1: use struct nfs_client to qualify deviceid
45df3c8 pnfs: resolve header dependency in pnfs.h
a1eaecb NFSv4.1: make deviceid cache global
47a0c5c NFSv4.1: purge deviceid cache on nfs_free_client
[1/8] bee4df2 SQUASHME: into NFSv4.1: purge deviceid cache - let ver < 4.1 compile
43d3f13 pnfs: CB_NOTIFY_DEVICEID
7073887 NFSv4.1: use layout driver in global device cache
aca9487 SUNRPC: introduce xdr_init_decode_pages
9734962 pnfs: Use byte-range for layoutget
adda93b pnfs: align layoutget requests on page boundaries
d3fa95a pnfs: Use byte-range for cb_layoutrecall
fbc41a4 pnfs: client stats
cb4a216 pnfs-obj: objlayoutdriver module skeleton
0d81921 pnfs-obj: pnfs_osd XDR definitions
08758d6 pnfs-obj: pnfs_osd XDR client implementation
4e2d111 pnfs-obj: decode layout, alloc/free lseg
[2/8] 63ab8d8 SQUASHME V2: objio alloc/free lseg Bugs fixes
33e6214 NEWVERSION: pnfs-obj: objio_osd device information retrieval and caching 40981be pnfs: alloc and free layout_hdr layoutdriver methods d868d03 pnfs-obj: define per-inode private structure
03287b4 pnfs: support for non-rpc layout drivers
459cdad pnfs-obj: osd raid engine read/write implementation
[3/8] 5f4a353 SQUASHME: objio read/write patch: Bugs fixes
a56f840 pnfs: layoutreturn
79d5152 pnfs: layoutret_on_setattr
b8b72b3 pnfs: encode_layoutreturn
[4/8] 3195a51 NEWVERSION: pnfs-obj: report errors and .encode_layoutreturn Implementation.
2ae4424 pnfs: encode_layoutcommit
9b0b09b pnfs-obj: objlayout_encode_layoutcommit implementation aa838bf NFSv4.1: unify pnfs_pageio_init functions
[5/8] e7f243f SQUASHME: Fix BUG in: NFSv4.1: unify pnfs_pageio_init functions
d93594a NFSv4.1: change pg_test return type to bool
8630b61 NFSv4.1: use pnfs_generic_pg_test directly by layout driver
[6/8] a1f29c7 NFSv4.1: define nfs_generic_pg_test

(This one had merge conflict with e7f243f SQUASHME, so it is different)

[7/8] 413647e SQUASHME: Move a check from nfs_pageio_do_add_request to nfs_generic_pg_test
(I've sent two changes to this. This is the unified fix)

8e88dcd pnfs-obj: pg_test check for max_io_size
[8/8] 4e3c595 SQUASHME: pnfs-obj: objio_pg_test some checkpatch love

One might also be interested in the *pnfsd-exofs* branch. It includes all the server patches, and exofs changes. And was changed to be made cleanly mergable with pnfs-submit. (Please not that in it's current form it is not compilable before the merge do to headers
changes that are in pnfs-submit.)

With the above unified tree I'm able to not crash and do pnfs-IO. I will continue the testing all day, to make sure.

Thanks
Boaz