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authorDenis V. Lunev <den@openvz.org>2015-11-19 09:42:01 +0300
committerJuan Quintela <quintela@redhat.com>2015-11-19 11:50:00 +0100
commite9ff957ac26e0e11869a3568cfa7423ae33c51e7 (patch)
tree202f78903d148296e9bd8a86814b47e10426816e /include
parent5df5416e639cd75bd85d243af41387c2418fa580 (diff)
snapshot: create helper to test that block drivers supports snapshots
The patch enforces proper locking for this operation. 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 'include')
-rw-r--r--include/block/snapshot.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/block/snapshot.h b/include/block/snapshot.h
index 770d9bbc8c..6195c9c8be 100644
--- a/include/block/snapshot.h
+++ b/include/block/snapshot.h
@@ -75,4 +75,12 @@ int bdrv_snapshot_load_tmp(BlockDriverState *bs,
int bdrv_snapshot_load_tmp_by_id_or_name(BlockDriverState *bs,
const char *id_or_name,
Error **errp);
+
+
+/* Group operations. All block drivers are involved.
+ * These functions will properly handle dataplane (take aio_context_acquire
+ * when appropriate for appropriate block drivers */
+
+bool bdrv_all_can_snapshot(BlockDriverState **first_bad_bs);
+
#endif