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authorDenis V. Lunev <den@openvz.org>2015-11-19 09:42:08 +0300
committerJuan Quintela <quintela@redhat.com>2015-11-19 11:50:00 +0100
commita9085f9b5583ba7a02b412ba08f929555112c244 (patch)
tree55a9d5a9e339a2e08a6e7e9c5af079a99dd8849c /block
parentc6258b04f19bc690b576b089f621cb5333c533d7 (diff)
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')
-rw-r--r--block/snapshot.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/block/snapshot.c b/block/snapshot.c
index eae4730fc6..75d0b968f6 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;
+}