From 80c05846f604bab6d61e9732c262420ee9f5f358 Mon Sep 17 00:00:00 2001 From: Mark Fasheh Date: Fri, 8 Sep 2006 14:43:18 -0700 Subject: ocfs2: Add dentry tracking API Replace the dentry vote mechanism with a cluster lock which covers a set of dentries. This allows us to force d_delete() only on nodes which actually care about an unlink. Every node that does a ->lookup() gets a read only lock on the dentry, until an unlink during which the unlinking node, will request an exclusive lock, forcing the other nodes who care about that dentry to d_delete() it. The effect is that we retain a very lightweight ->d_revalidate(), and at the same time get to make large improvements to the average case performance of the ocfs2 unlink and rename operations. This patch adds the higher level API and the dentry manipulation code. Signed-off-by: Mark Fasheh --- fs/ocfs2/dcache.h | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-) (limited to 'fs/ocfs2/dcache.h') diff --git a/fs/ocfs2/dcache.h b/fs/ocfs2/dcache.h index f1423c2134ee..e53abe766cab 100644 --- a/fs/ocfs2/dcache.h +++ b/fs/ocfs2/dcache.h @@ -41,17 +41,17 @@ struct ocfs2_dentry_lock { struct ocfs2_lock_res dl_lockres; }; -static inline void ocfs2_dentry_lock_put(struct ocfs2_super *osb, - struct ocfs2_dentry_lock *dl) -{ -} - -static inline struct dentry *ocfs2_find_local_alias(struct inode *inode, - u64 parent_blkno, - int skip_unhashed) -{ - return NULL; -} +int ocfs2_dentry_attach_lock(struct dentry *dentry, struct inode *inode, + u64 parent_blkno, int create); + +void ocfs2_dentry_lock_put(struct ocfs2_super *osb, + struct ocfs2_dentry_lock *dl); + +struct dentry *ocfs2_find_local_alias(struct inode *inode, u64 parent_blkno, + int skip_unhashed); + +void ocfs2_dentry_move(struct dentry *dentry, struct dentry *target, + struct inode *old_dir, struct inode *new_dir); extern spinlock_t dentry_attach_lock; -- cgit v1.2.3-70-g09d2