[Qemu-devel] [PATCH V3 0/7] qcow2: rollback the modification on fail in snapshot creation

[Wenchao Xia <xiawenc@linux.vnet.ibm.com>]

V2:
  1: all fail case will goto fail section.
  2: add the goto code.
v3:
  Address Stefan's comments:
  2: don't goto fail after allocation failure.
  3: use sn->l1size correctly in qcow2_free_cluster().
  4-7: add test case to verify the error paths.
  Other:
  1: new patch fix a existing bug, which will be exposed in error path test.


Wenchao Xia (7):
  1 qcow2: restore nb_snapshots when fail in snapshot creation
  2 qcow2: free allocated cluster on fail in qcow2_write_snapshots()
  3 qcow2: cancel the modification on fail in qcow2_snapshot_create()
  4 blkdebug: add debug events for snapshot
  5 qcow2: use debug events for snapshot
  6 qcow2: print message for error path in snapshot creation
  7 qemu-iotests: add test for qcow2 snapshot

 block/blkdebug.c           |    4 +
 block/qcow2-snapshot.c     |   80 ++++++++++++++--
 include/block/block.h      |    4 +
 tests/qemu-iotests/063     |  229 ++++++++++++++++++++++++++++++++++++++++++++
 tests/qemu-iotests/063.out |   37 +++++++
 tests/qemu-iotests/group   |    1 +
 6 files changed, 348 insertions(+), 7 deletions(-)
 create mode 100755 tests/qemu-iotests/063
 create mode 100644 tests/qemu-iotests/063.out