Typical sheepdog clients issues two or more locking request
(SD_OP_LOCK_VDI, typically issued in the function
find_vdi_name() of clients) during their lifetime because it is
required when snapshots of their VDIs are taken. In such a case, an
existing lock becomes needless because the lock points snapshot. This
patch add a release procedure for the case.
Signed-off-by: Hitoshi Mitake <mitake.hito...@lab.ntt.co.jp>
---
sheep/ops.c | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/sheep/ops.c b/sheep/ops.c
index 519e708..3469c61 100644
--- a/sheep/ops.c
+++ b/sheep/ops.c
@@ -239,6 +239,14 @@ static int cluster_lock_vdi_work(struct request *req)
{
int ret;
+ if (req->ci->locking_interest_vid) {
+ /* 1 fd cannot lock more than 2 VIDs */
+ sd_debug("unlocking VID: %"PRIx32, req->ci->interest_vid);
+ notify_release_vdi(req->ci->interest_vid);
+ req->ci->locking_interest_vid = false;
+ req->ci->interest_vid = 0;
+ }
+
ret = cluster_get_vdi_info(req);
if (ret != SD_RES_SUCCESS)
return ret;
--
1.7.1
--
sheepdog mailing list
sheepdog@lists.wpkg.org
http://lists.wpkg.org/mailman/listinfo/sheepdog
