From: Jeff Cody <jc...@redhat.com>
During a commit of 'all' using the HMP non-live commit, the operation
is aborted and returns error on the first error enountered. When
non-COW drives are in use (e.g. ejected floppy, cdrom, or drives without
a backing parent), that means a commit all will return an error of either
-ENOMEDIUM or -ENOTSUP. This is not desirable, so for the 'all' commit
case, only attempt the commit if both bs->drv and bs->backing_hd are
present.
More succinctly: 'commit all' now means a commit on all COW drives.
This means an individual commit to a specific non-COW drive will still
return the appropriate error (-ENOMEDIUM if eject / not present, -ENOTSUP
if no backing file).
Reported-by: Jan Kiszka <jan.kis...@web.de>
Signed-off-by: Jeff Cody <jc...@redhat.com>
Reviewed-by: Paolo Bonzini <pbonz...@redhat.com>
Reviewed-by: Kevin Wolf <kw...@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefa...@redhat.com>
---
block.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/block.c b/block.c
index 4582961..124a9eb 100644
--- a/block.c
+++ b/block.c
@@ -1640,9 +1640,11 @@ int bdrv_commit_all(void)
BlockDriverState *bs;
QTAILQ_FOREACH(bs, &bdrv_states, list) {
- int ret = bdrv_commit(bs);
- if (ret < 0) {
- return ret;
+ if (bs->drv && bs->backing_hd) {
+ int ret = bdrv_commit(bs);
+ if (ret < 0) {
+ return ret;
+ }
}
}
return 0;
--
1.8.1.4
