diff mbox

[v2,03/13] blockdev: Lock BDS during internal snapshot transaction

Message ID 1433215322-23529-4-git-send-email-famz@redhat.com
State New
Headers show

Commit Message

Fam Zheng June 2, 2015, 3:21 a.m. UTC 
Signed-off-by: Fam Zheng <famz@redhat.com>
---
 blockdev.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox

Patch

diff --git a/blockdev.c b/blockdev.c
index 5eaf77e..fdc5a17 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -1356,6 +1356,7 @@  static void internal_snapshot_prepare(BlkTransactionState *common,
     }
 
     /* 4. succeed, mark a snapshot is created */
+    bdrv_lock(bs);
     state->bs = bs;
 }
 
@@ -1387,6 +1388,9 @@  static void internal_snapshot_clean(BlkTransactionState *common)
     InternalSnapshotState *state = DO_UPCAST(InternalSnapshotState,
                                              common, common);
 
+    if (state->bs) {
+        bdrv_unlock(state->bs);
+    }
     if (state->aio_context) {
         aio_context_release(state->aio_context);
     }