diff options
Diffstat (limited to 'fs/ocfs2/dlmglue.c')
| -rw-r--r-- | fs/ocfs2/dlmglue.c | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c index 295c47f7aba2..b640423b936a 100644 --- a/fs/ocfs2/dlmglue.c +++ b/fs/ocfs2/dlmglue.c @@ -880,13 +880,20 @@ static void ocfs2_locking_ast(void *opaque) struct ocfs2_lock_res *lockres = opaque; struct ocfs2_super *osb = ocfs2_get_lockres_osb(lockres); unsigned long flags; + int status; spin_lock_irqsave(&lockres->l_lock, flags); - if (ocfs2_dlm_lock_status(&lockres->l_lksb)) { + status = ocfs2_dlm_lock_status(&lockres->l_lksb); + + if (status == -EAGAIN) { + lockres_clear_flags(lockres, OCFS2_LOCK_BUSY); + goto out; + } + + if (status) { mlog(ML_ERROR, "lockres %s: lksb status value of %d!\n", - lockres->l_name, - ocfs2_dlm_lock_status(&lockres->l_lksb)); + lockres->l_name, status); spin_unlock_irqrestore(&lockres->l_lock, flags); return; } @@ -909,7 +916,7 @@ static void ocfs2_locking_ast(void *opaque) lockres->l_unlock_action); BUG(); } - +out: /* set it to something invalid so if we get called again we * can catch it. */ lockres->l_action = OCFS2_AST_INVALID; @@ -1113,6 +1120,7 @@ static int ocfs2_cluster_lock(struct ocfs2_super *osb, int ret = 0; /* gcc doesn't realize wait = 1 guarantees ret is set */ unsigned long flags; unsigned int gen; + int noqueue_attempted = 0; mlog_entry_void(); @@ -1157,6 +1165,13 @@ again: } if (level > lockres->l_level) { + if (noqueue_attempted > 0) { + ret = -EAGAIN; + goto unlock; + } + if (lkm_flags & DLM_LKF_NOQUEUE) + noqueue_attempted = 1; + if (lockres->l_action != OCFS2_AST_INVALID) mlog(ML_ERROR, "lockres %s has action %u pending\n", lockres->l_name, lockres->l_action); @@ -1621,6 +1636,10 @@ int ocfs2_file_lock(struct file *file, int ex, int trylock) * to just bubble sucess back up to the user. */ ret = ocfs2_flock_handle_signal(lockres, level); + } else if (!ret && (level > lockres->l_level)) { + /* Trylock failed asynchronously */ + BUG_ON(!trylock); + ret = -EAGAIN; } out: |