[17/18] sheepdog: don't update inode when create_and_write fails

Submitted by Stefan Hajnoczi on Dec. 19, 2012, 3:38 p.m.

Details

Message ID 1355931499-7912-18-git-send-email-stefanha@redhat.com
State New
Headers show

Commit Message

Stefan Hajnoczi Dec. 19, 2012, 3:38 p.m.
From: Liu Yuan <tailai.ly@taobao.com>

For the error case such as SD_RES_NO_SPACE, we shouldn't update the inode bitmap
to avoid the scenario that the object is allocated but wasn't created at the
server side. This will result in VM's IO error on the failed object.

Cc: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp>
Cc: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Liu Yuan <tailai.ly@taobao.com>
Reviewed-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
 block/sheepdog.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

Patch hide | download patch | download mbox

diff --git a/block/sheepdog.c b/block/sheepdog.c
index a48f58c..ef7bc81 100644
--- a/block/sheepdog.c
+++ b/block/sheepdog.c
@@ -714,10 +714,11 @@  static void coroutine_fn aio_read_response(void *opaque)
              * and max_dirty_data_idx are changed to include updated
              * index between them.
              */
-            s->inode.data_vdi_id[idx] = s->inode.vdi_id;
-            s->max_dirty_data_idx = MAX(idx, s->max_dirty_data_idx);
-            s->min_dirty_data_idx = MIN(idx, s->min_dirty_data_idx);
-
+            if (rsp.result == SD_RES_SUCCESS) {
+                s->inode.data_vdi_id[idx] = s->inode.vdi_id;
+                s->max_dirty_data_idx = MAX(idx, s->max_dirty_data_idx);
+                s->min_dirty_data_idx = MIN(idx, s->min_dirty_data_idx);
+            }
             /*
              * Some requests may be blocked because simultaneous
              * create requests are not allowed, so we search the