diff options
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/md-cluster.c | 41 |
1 files changed, 35 insertions, 6 deletions
diff --git a/drivers/md/md-cluster.c b/drivers/md/md-cluster.c index 2a57f193b103..b80a689aad04 100644 --- a/drivers/md/md-cluster.c +++ b/drivers/md/md-cluster.c @@ -166,10 +166,24 @@ out_err: static void lockres_free(struct dlm_lock_resource *res) { + int ret; + if (!res) return; - dlm_unlock(res->ls, res->lksb.sb_lkid, 0, &res->lksb, res); + /* cancel a lock request or a conversion request that is blocked */ + res->flags |= DLM_LKF_CANCEL; +retry: + ret = dlm_unlock(res->ls, res->lksb.sb_lkid, 0, &res->lksb, res); + if (unlikely(ret != 0)) { + pr_info("%s: failed to unlock %s return %d\n", __func__, res->name, ret); + + /* if a lock conversion is cancelled, then the lock is put + * back to grant queue, need to ensure it is unlocked */ + if (ret == -DLM_ECANCEL) + goto retry; + } + res->flags &= ~DLM_LKF_CANCEL; wait_for_completion(&res->completion); kfree(res->name); @@ -474,6 +488,7 @@ static void recv_daemon(struct md_thread *thread) struct dlm_lock_resource *ack_lockres = cinfo->ack_lockres; struct dlm_lock_resource *message_lockres = cinfo->message_lockres; struct cluster_msg msg; + int ret; /*get CR on Message*/ if (dlm_lock_sync(message_lockres, DLM_LOCK_CR)) { @@ -486,13 +501,21 @@ static void recv_daemon(struct md_thread *thread) process_recvd_msg(thread->mddev, &msg); /*release CR on ack_lockres*/ - dlm_unlock_sync(ack_lockres); + ret = dlm_unlock_sync(ack_lockres); + if (unlikely(ret != 0)) + pr_info("unlock ack failed return %d\n", ret); /*up-convert to PR on message_lockres*/ - dlm_lock_sync(message_lockres, DLM_LOCK_PR); + ret = dlm_lock_sync(message_lockres, DLM_LOCK_PR); + if (unlikely(ret != 0)) + pr_info("lock PR on msg failed return %d\n", ret); /*get CR on ack_lockres again*/ - dlm_lock_sync(ack_lockres, DLM_LOCK_CR); + ret = dlm_lock_sync(ack_lockres, DLM_LOCK_CR); + if (unlikely(ret != 0)) + pr_info("lock CR on ack failed return %d\n", ret); /*release CR on message_lockres*/ - dlm_unlock_sync(message_lockres); + ret = dlm_unlock_sync(message_lockres); + if (unlikely(ret != 0)) + pr_info("unlock msg failed return %d\n", ret); } /* lock_comm() @@ -567,7 +590,13 @@ static int __sendmsg(struct md_cluster_info *cinfo, struct cluster_msg *cmsg) } failed_ack: - dlm_unlock_sync(cinfo->message_lockres); + error = dlm_unlock_sync(cinfo->message_lockres); + if (unlikely(error != 0)) { + pr_err("md-cluster: failed convert to NL on MESSAGE(%d)\n", + error); + /* in case the message can't be released due to some reason */ + goto failed_ack; + } failed_message: return error; } |