diff options
| author | Denis V. Lunev <den@openvz.org> | 2015-11-19 09:42:04 +0300 |
|---|---|---|
| committer | Juan Quintela <quintela@redhat.com> | 2015-11-19 11:50:00 +0100 |
| commit | 4c1cdbaad07d067f3d156687d79014ab44387e2c (patch) | |
| tree | f5eb7f5ba89b5f5b9c074ac5260f91c04fe09d12 /block/snapshot.c | |
| parent | 9b00ea376d42e543feb12d7ce5435366d01aab1b (diff) | |
snapshot: create bdrv_all_goto_snapshot helper
to switch to snapshot on all loaded block drivers.
The patch also ensures proper locking.
Signed-off-by: Denis V. Lunev <den@openvz.org>
Reviewed-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
CC: Kevin Wolf <kwolf@redhat.com>
Tested-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Diffstat (limited to 'block/snapshot.c')
| -rw-r--r-- | block/snapshot.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/block/snapshot.c b/block/snapshot.c index 61a6ad12dc..9f07a63e6d 100644 --- a/block/snapshot.c +++ b/block/snapshot.c @@ -403,3 +403,23 @@ int bdrv_all_delete_snapshot(const char *name, BlockDriverState **first_bad_bs, *first_bad_bs = bs; return ret; } + + +int bdrv_all_goto_snapshot(const char *name, BlockDriverState **first_bad_bs) +{ + int err = 0; + BlockDriverState *bs = NULL; + + while (err == 0 && (bs = bdrv_next(bs))) { + AioContext *ctx = bdrv_get_aio_context(bs); + + aio_context_acquire(ctx); + if (bdrv_can_snapshot(bs)) { + err = bdrv_snapshot_goto(bs, name); + } + aio_context_release(ctx); + } + + *first_bad_bs = bs; + return err; +} |