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
