[Qemu-devel] [PATCH v5 00/27] block: Lock images when opening

[Fam Zheng <famz@redhat.com>]

v5: - Change "lock-image=on/off" to "lock-mode=exclusive/shared/off".
      Default is "lock-mode=exclusive" to exclusively lock RW images and shared
      lock RO images; with lock-mode="shared", RW images are shared locked too;
      lock-mode=off turns off image locking completely.
    - Use F_OFD_SETLK fcntl so that close/dup on different fds are not a
      problem.
    - Update test cases.


Fam Zheng (27):
  block: Add flag bits for image locking
  qapi: Add lock-mode in blockdev-add options
  blockdev: Add and parse "lock-mode" option for image locking
  block: Introduce image file locking
  block: Add bdrv_image_locked
  block: Make bdrv_reopen_{commit, abort} private functions
  block: Handle image locking during reopen
  osdep: Add qemu_lock_fd and qemu_unlock_fd
  osdep: Introduce qemu_dup
  raw-posix: Use qemu_dup
  raw-posix: Implement .bdrv_lockf
  gluster: Implement .bdrv_lockf
  qemu-io: Add "-L" option for BDRV_O_NO_LOCK
  qemu-img: Add "-L" option to sub commands
  qemu-img: Update documentation of "-L" option
  qemu-nbd: Add "--no-lock/-L" option
  block: Don't lock drive-backup target image in none mode
  mirror: Disable image locking on target backing chain
  qemu-iotests: 140: Disable image lock for qemu-io access
  qemu-iotests: 046: Move version detection out from verify_io
  qemu-iotests: Wait for QEMU processes before checking image in 091
  qemu-iotests: 030: Disable image lock when checking test image
  iotests: 087: Disable image lock in cases where file is shared
  iotests: Disable image locking in 085
  tests: Use null-co:// instead of /dev/null
  block: Turn on image locking by default
  qemu-iotests: Add test case 153 for image locking

 block.c                    |  70 +++++++-
 block/gluster.c            |  31 ++++
 block/raw-posix.c          |  32 +++-
 blockdev.c                 |  34 ++++
 include/block/block.h      |   7 +-
 include/block/block_int.h  |  11 ++
 include/qemu/osdep.h       |   3 +
 qapi/block-core.json       |  20 ++-
 qemu-img-cmds.hx           |  44 ++---
 qemu-img.c                 |  90 ++++++++--
 qemu-img.texi              |   3 +
 qemu-io.c                  |  24 ++-
 qemu-nbd.c                 |   7 +-
 qemu-nbd.texi              |   2 +
 tests/drive_del-test.c     |   2 +-
 tests/nvme-test.c          |   2 +-
 tests/qemu-iotests/030     |   2 +-
 tests/qemu-iotests/046     |  22 +--
 tests/qemu-iotests/085     |   3 +-
 tests/qemu-iotests/087     |   6 +
 tests/qemu-iotests/091     |   3 +
 tests/qemu-iotests/091.out |   1 +
 tests/qemu-iotests/140     |   2 +-
 tests/qemu-iotests/153     | 197 +++++++++++++++++++++
 tests/qemu-iotests/153.out | 426 +++++++++++++++++++++++++++++++++++++++++++++
 tests/qemu-iotests/group   |   1 +
 tests/usb-hcd-uhci-test.c  |   2 +-
 tests/usb-hcd-xhci-test.c  |   2 +-
 tests/virtio-blk-test.c    |   2 +-
 tests/virtio-scsi-test.c   |   4 +-
 util/osdep.c               |  37 ++++
 31 files changed, 1014 insertions(+), 78 deletions(-)
 create mode 100755 tests/qemu-iotests/153
 create mode 100644 tests/qemu-iotests/153.out

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2.8.2