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/dcache.h b/fs/ocfs2/dcache.h
index c091c34..d06e16c 100644
--- a/fs/ocfs2/dcache.h
+++ b/fs/ocfs2/dcache.h
@@ -29,8 +29,13 @@
extern struct dentry_operations ocfs2_dentry_ops;
struct ocfs2_dentry_lock {
+ /* Use count of dentry lock */
unsigned int dl_count;
- u64 dl_parent_blkno;
+ union {
+ /* Linked list of dentry locks to release */
+ struct ocfs2_dentry_lock *dl_next;
+ u64 dl_parent_blkno;
+ };
/*
* The ocfs2_dentry_lock keeps an inode reference until
@@ -47,6 +52,8 @@
void ocfs2_dentry_lock_put(struct ocfs2_super *osb,
struct ocfs2_dentry_lock *dl);
+void ocfs2_drop_dl_inodes(struct work_struct *work);
+
struct dentry *ocfs2_find_local_alias(struct inode *inode, u64 parent_blkno,
int skip_unhashed);