diff options
| author | Pranith Kumar K <pranithk@gluster.com> | 2012-07-30 21:01:21 +0530 |
|---|---|---|
| committer | Vijay Bellur <vbellur@redhat.com> | 2012-08-17 01:14:38 -0700 |
| commit | 1df75bc835a75f17fa0fcd3722ef68f05f5f3200 (patch) | |
| tree | ae228e509ee89d1621aeddb9dc8192ef01cfbfc1 | |
| parent | 30a9ebd91339f36d092f46bbba116fa4047fb8c5 (diff) | |
cluster/afr: Handle child_up & fd not opened case in xaction
RCA:
When an fd is opened while a brick is down, after the brick
comes back up afr issues open on the other brick. It can
fail for a number of reasons (enoent etc). While the system
is in that state, inode/entrylks pre-op happen only on the
brick that is up and fd is opened for fd-fops. post-op should
consider only the bricks where both pre-op and fop succeeded
as success, rest of them as failures. Code now marks only the
children that are down as failures as opposed to child_down &
fd-not-opened. This makes change-log appear as success on the
subvolume where we did not do any fop leading to no change-log
but differences in data/metadata for reg-files.
Fix:
Mark non-participants of fop as failure. This is tracked in
transaction.pre_op[].
Tests:
Simulated the scenario using err-gen on top of one of the client
xlator which fails all fops always. Performed fops and the changelog
represented pending fops on the brick with err-gen loaded. Tested
the case of brick down and perform entry/metadata/data operations
to confirm they still work as expected.
Change-Id: I41905936126b19abba56ca581c0301a894507e1a
BUG: 844987
Signed-off-by: Pranith Kumar K <pranithk@gluster.com>
Reviewed-on: http://review.gluster.com/3776
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
| -rw-r--r-- | xlators/cluster/afr/src/afr-transaction.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/xlators/cluster/afr/src/afr-transaction.c b/xlators/cluster/afr/src/afr-transaction.c index e0729fbf6..b21e14a4b 100644 --- a/xlators/cluster/afr/src/afr-transaction.c +++ b/xlators/cluster/afr/src/afr-transaction.c @@ -175,16 +175,16 @@ out: static void -__mark_down_children (int32_t *pending[], int child_count, - unsigned char *child_up, afr_transaction_type type) +__mark_non_participant_children (int32_t *pending[], int child_count, + unsigned char *participants, + afr_transaction_type type) { int i = 0; int j = 0; + j = afr_index_for_transaction_type (type); for (i = 0; i < child_count; i++) { - j = afr_index_for_transaction_type (type); - - if (!child_up[i]) + if (!participants[i]) pending[i][j] = 0; } } @@ -511,8 +511,9 @@ afr_changelog_post_op (call_frame_t *frame, xlator_t *this) local = frame->local; int_lock = &local->internal_lock; - __mark_down_children (local->pending, priv->child_count, - local->child_up, local->transaction.type); + __mark_non_participant_children (local->pending, priv->child_count, + local->transaction.pre_op, + local->transaction.type); if (local->fd) afr_transaction_rm_stale_children (frame, this, |