Modifications to the drives' readonly attribute

Naphtali Sprei (3):
Make CDROM a read-only drive
Switch to bit-flags based read-only drive option implementation Disable fall-back to read-only when cannot open drive's file for
read-write

 block.c           |   29 +++++++++++++----------------
 block.h           |    4 ++--
 block/raw-posix.c |    2 +-
 block/raw-win32.c |    4 ++--
 block/vmdk.c      |    9 +++++----
 hw/xen_disk.c     |    2 +-
 monitor.c         |    2 +-
 qemu-img.c        |   10 ++++++----
 qemu-io.c         |   14 ++++++--------
 qemu-nbd.c        |    2 +-
 qemu-options.hx   |    2 +-
 vl.c              |   14 +++++++++++---
 12 files changed, 50 insertions(+), 44 deletions(-)