diff options
| author | Mohammed Rafi KC <rkavunga@redhat.com> | 2016-05-03 14:43:20 +0530 |
|---|---|---|
| committer | Raghavendra G <rgowdapp@redhat.com> | 2016-06-20 04:56:16 -0700 |
| commit | 6106aec748e8f1c328dda30cbbb5bdfa91c0a869 (patch) | |
| tree | 0300b0e43a24d0b3728180dc5e80b39a68621953 /xlators/cluster/dht/src/dht-common.c | |
| parent | d1a4e534ba9283da9e75033f4a3a309d16176b24 (diff) | |
dht:remember locked subvol and send unlock to the same
During locking we send lock request to cached subvol,
and normally we unlock to the cached subvol
But with parallel fresh lookup on a directory, there
is a race window where the cached subvol can change
and the unlock can go into a different subvol from
which we took lock.
This will result in a stale lock held on one of the
subvol.
So we will store the details of subvol which we took the lock
and will unlock from the same subvol
Back port of>
>Change-Id: I47df99491671b10624eb37d1d17e40bacf0b15eb
>BUG: 1311002
>Signed-off-by: Mohammed Rafi KC <rkavunga@redhat.com>
>Reviewed-on: http://review.gluster.org/13492
>Reviewed-by: N Balachandran <nbalacha@redhat.com>
>Smoke: Gluster Build System <jenkins@build.gluster.com>
>NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
>Reviewed-by: Raghavendra G <rgowdapp@redhat.com>
>CentOS-regression: Gluster Build System <jenkins@build.gluster.com>
(cherry picked from commit ef0db52bc55a51fe5e3856235aed0230b6a188fe)
Change-Id: Ib821e7355b4937b86d2f9f11e2c8311b7301b6c7
BUG: 1347524
Signed-off-by: Mohammed Rafi KC <rkavunga@redhat.com>
Reviewed-on: http://review.gluster.org/14750
Smoke: Gluster Build System <jenkins@build.gluster.org>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: N Balachandran <nbalacha@redhat.com>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Raghavendra G <rgowdapp@redhat.com>
Diffstat (limited to 'xlators/cluster/dht/src/dht-common.c')
| -rw-r--r-- | xlators/cluster/dht/src/dht-common.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/xlators/cluster/dht/src/dht-common.c b/xlators/cluster/dht/src/dht-common.c index 7e68be5553c..21962cd342c 100644 --- a/xlators/cluster/dht/src/dht-common.c +++ b/xlators/cluster/dht/src/dht-common.c @@ -8404,7 +8404,10 @@ dht_entrylk_cbk (call_frame_t *frame, void *cookie, return 0; } - +/* TODO + * Sending entrylk to cached subvol can result in stale lock + * as described in the bug 1311002. + */ int dht_entrylk (call_frame_t *frame, xlator_t *this, const char *volume, loc_t *loc, const char *basename, |