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authorAnand Avati <avati@redhat.com>2013-02-06 09:03:03 -0800
committerAnand Avati <avati@redhat.com>2013-02-07 11:09:35 -0800
commitdc2da4a3d9629fe3249fe540e22748527ce05483 (patch)
treec0f2986fcdcbb60369df4d7df714d34db48482b4 /xlators/cluster/afr
parent78ae7215614a7717d2cf838afefb1525fbb70602 (diff)
afr: serialize modification of {entrylk,inodelk}_lock_count
Typically this lock was not needed in practice, but with http://review.gluster.org/3842, this code gets executed in multiple threads for different servers and we lose a count. This results in leaked lock and a hang for a future transaction. Change-Id: I377ed20e44f2a45cff522289dfef181f0653eca2 BUG: 765564 Signed-off-by: Anand Avati <avati@redhat.com> Reviewed-on: http://review.gluster.org/4480 Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com>
Diffstat (limited to 'xlators/cluster/afr')
-rw-r--r--xlators/cluster/afr/src/afr-lk-common.c107
1 files changed, 54 insertions, 53 deletions
diff --git a/xlators/cluster/afr/src/afr-lk-common.c b/xlators/cluster/afr/src/afr-lk-common.c
index 75df3bb3d..cb74fc80e 100644
--- a/xlators/cluster/afr/src/afr-lk-common.c
+++ b/xlators/cluster/afr/src/afr-lk-common.c
@@ -1243,26 +1243,27 @@ afr_nonblocking_entrylk_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
int_lock->lockee[lockee_no].basename, op_ret,
op_errno, (long) cookie);
- if (op_ret < 0 ) {
- if (op_errno == ENOSYS) {
+ LOCK (&frame->lock);
+ {
+ if (op_ret < 0 ) {
+ if (op_errno == ENOSYS) {
/* return ENOTSUP */
- gf_log (this->name, GF_LOG_ERROR,
- "subvolume does not support locking. "
- "please load features/locks xlator on server");
- local->op_ret = op_ret;
- int_lock->lock_op_ret = op_ret;
+ gf_log (this->name, GF_LOG_ERROR,
+ "subvolume does not support locking. "
+ "please load features/locks xlator on server");
+ local->op_ret = op_ret;
+ int_lock->lock_op_ret = op_ret;
+
+ int_lock->lock_op_errno = op_errno;
+ local->op_errno = op_errno;
+ }
+ } else if (op_ret == 0) {
+ int_lock->lockee[lockee_no].locked_nodes[index] |= \
+ LOCKED_YES;
+ int_lock->lockee[lockee_no].locked_count++;
+ int_lock->entrylk_lock_count++;
+ }
- int_lock->lock_op_errno = op_errno;
- local->op_errno = op_errno;
- }
- } else if (op_ret == 0) {
- int_lock->lockee[lockee_no].locked_nodes[index] |= LOCKED_YES;
- int_lock->lockee[lockee_no].locked_count++;
- int_lock->entrylk_lock_count++;
- }
-
- LOCK (&frame->lock);
- {
call_count = --int_lock->lk_call_count;
}
UNLOCK (&frame->lock);
@@ -1426,47 +1427,47 @@ afr_nonblocking_inodelk_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
AFR_LOCK_OP, NULL, op_ret,
op_errno, (long) cookie);
- if (op_ret < 0) {
- if (op_errno == ENOSYS) {
- /* return ENOTSUP */
- gf_log (this->name, GF_LOG_ERROR,
- "subvolume does not support locking. "
- "please load features/locks xlator on server");
- local->op_ret = op_ret;
- int_lock->lock_op_ret = op_ret;
- int_lock->lock_op_errno = op_errno;
- local->op_errno = op_errno;
- }
- if (local->transaction.eager_lock)
- local->transaction.eager_lock[child_index] = 0;
- } else {
- int_lock->inode_locked_nodes[child_index]
- |= LOCKED_YES;
- int_lock->inodelk_lock_count++;
-
- if (local->transaction.eager_lock &&
- local->transaction.eager_lock[child_index] && local->fd) {
- fd_ctx = afr_fd_ctx_get (local->fd, this);
- /* piggybacked */
-
- if (op_ret == 1) {
- /* piggybacked */
- } else if (op_ret == 0) {
- /* lock acquired from server */
- LOCK (&local->fd->lock);
- {
- fd_ctx->lock_acquired[child_index]++;
- }
- UNLOCK (&local->fd->lock);
- }
- }
- }
+ if (local->fd)
+ fd_ctx = afr_fd_ctx_get (local->fd, this);
LOCK (&frame->lock);
{
+ if (op_ret < 0) {
+ if (op_errno == ENOSYS) {
+ /* return ENOTSUP */
+ gf_log (this->name, GF_LOG_ERROR,
+ "subvolume does not support locking. "
+ "please load features/locks xlator on "
+ "server");
+ local->op_ret = op_ret;
+ int_lock->lock_op_ret = op_ret;
+ int_lock->lock_op_errno = op_errno;
+ local->op_errno = op_errno;
+ }
+ if (local->transaction.eager_lock)
+ local->transaction.eager_lock[child_index] = 0;
+ } else {
+ int_lock->inode_locked_nodes[child_index]
+ |= LOCKED_YES;
+ int_lock->inodelk_lock_count++;
+
+ if (local->transaction.eager_lock &&
+ local->transaction.eager_lock[child_index] &&
+ local->fd) {
+ /* piggybacked */
+ if (op_ret == 1) {
+ /* piggybacked */
+ } else if (op_ret == 0) {
+ /* lock acquired from server */
+ fd_ctx->lock_acquired[child_index]++;
+ }
+ }
+ }
+
call_count = --int_lock->lk_call_count;
}
UNLOCK (&frame->lock);
+
if (call_count == 0) {
gf_log (this->name, GF_LOG_TRACE,
"Last inode locking reply received");