[Qemu-devel] [PATCH 0/2] block: commits of snapshots larger than backing files

[Jeff Cody <jcody@redhat.com>]

If a snapshot is larger than a backing file, then the offline bdrv_commit and
the live active layer commit will fail with an i/o error (usually).  A live
commit of a non-active layer will complete successfully, as it runs
bdrv_truncate() on the backing image to resize it to the larger size.

For both bdrv_commit() and commit_active_start(), this series will resize
the underlying base image if needed.  If the resize fails, an error will
be returned.


Jeff Cody (2):
  block: resize backing file image during offline commit, if necessary
  block: resize backing image during active layer commit, if needed

 block.c        | 18 +++++++++++++++---
 block/mirror.c | 13 +++++++++++++
 2 files changed, 28 insertions(+), 3 deletions(-)

-- 
1.8.3.1