diff options
| author | Denis V. Lunev <den@openvz.org> | 2015-11-19 09:42:08 +0300 |
|---|---|---|
| committer | Juan Quintela <quintela@redhat.com> | 2015-11-19 11:50:00 +0100 |
| commit | a9085f9b5583ba7a02b412ba08f929555112c244 (patch) | |
| tree | 55a9d5a9e339a2e08a6e7e9c5af079a99dd8849c /block/snapshot.c | |
| parent | c6258b04f19bc690b576b089f621cb5333c533d7 (diff) | |
| download | qemu-a9085f9b5583ba7a02b412ba08f929555112c244.zip qemu-a9085f9b5583ba7a02b412ba08f929555112c244.tar.gz qemu-a9085f9b5583ba7a02b412ba08f929555112c244.tar.bz2 | |
snapshot: create bdrv_all_create_snapshot helper
to create snapshot for all loaded block drivers.
The patch also ensures proper locking.
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/snapshot.c')
| -rw-r--r-- | block/snapshot.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/block/snapshot.c b/block/snapshot.c index eae4730..75d0b96 100644 --- a/block/snapshot.c +++ b/block/snapshot.c @@ -443,3 +443,29 @@ int bdrv_all_find_snapshot(const char *name, BlockDriverState **first_bad_bs) *first_bad_bs = bs; return err; } + +int bdrv_all_create_snapshot(QEMUSnapshotInfo *sn, + BlockDriverState *vm_state_bs, + uint64_t vm_state_size, + 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 (bs == vm_state_bs) { + sn->vm_state_size = vm_state_size; + err = bdrv_snapshot_create(bs, sn); + } else if (bdrv_can_snapshot(bs)) { + sn->vm_state_size = 0; + err = bdrv_snapshot_create(bs, sn); + } + aio_context_release(ctx); + } + + *first_bad_bs = bs; + return err; +} |