diff options
| author | Denis V. Lunev <den@openvz.org> | 2015-11-19 09:42:10 +0300 |
|---|---|---|
| committer | Juan Quintela <quintela@redhat.com> | 2015-11-19 11:50:00 +0100 |
| commit | 7cb14481498e7acd969a76b53be0535cd90f7d53 (patch) | |
| tree | 53e94877d1e4dae89962a5199694c03255603629 /block | |
| parent | 0b46160521ab72744da94988583a45d4d45e2986 (diff) | |
migration: implement bdrv_all_find_vmstate_bs helper
The patch also ensures proper locking for the operation.
Signed-off-by: Denis V. Lunev <den@openvz.org>
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')
| -rw-r--r-- | block/snapshot.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/block/snapshot.c b/block/snapshot.c index 75d0b968f6..6e9fa8da98 100644 --- a/block/snapshot.c +++ b/block/snapshot.c @@ -469,3 +469,18 @@ int bdrv_all_create_snapshot(QEMUSnapshotInfo *sn, *first_bad_bs = bs; return err; } + +BlockDriverState *bdrv_all_find_vmstate_bs(void) +{ + bool not_found = true; + BlockDriverState *bs = NULL; + + while (not_found && (bs = bdrv_next(bs))) { + AioContext *ctx = bdrv_get_aio_context(bs); + + aio_context_acquire(ctx); + not_found = !bdrv_can_snapshot(bs); + aio_context_release(ctx); + } + return bs; +} |