ocfs2: Push out dropping of dentry lock to ocfs2_wq
Dropping of last reference to dentry lock is a complicated operation involving
dropping of reference to inode. This can get complicated and quota code in
particular needs to obtain some quota locks which leads to potential deadlock.
Thus we defer dropping of inode reference to ocfs2_wq.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
index ad5c24a..0773841 100644
--- a/fs/ocfs2/ocfs2.h
+++ b/fs/ocfs2/ocfs2.h
@@ -210,6 +210,7 @@
struct ocfs2_slot_info;
struct ocfs2_recovery_map;
struct ocfs2_quota_recovery;
+struct ocfs2_dentry_lock;
struct ocfs2_super
{
struct task_struct *commit_task;
@@ -325,6 +326,11 @@
struct list_head blocked_lock_list;
unsigned long blocked_lock_count;
+ /* List of dentry locks to release. Anyone can add locks to
+ * the list, ocfs2_wq processes the list */
+ struct ocfs2_dentry_lock *dentry_lock_list;
+ struct work_struct dentry_lock_work;
+
wait_queue_head_t osb_mount_event;
/* Truncate log info */