[PATCH] vfs: shrink_dcache_parent on rmdir, dir rename only on success

[Sage Weil]

Only prune the dentries of the rmdir or dir rename succeeds.  Doing so on
failure makes no sense (though it's mostly harmless).

Signed-off-by: Sage Weil <sage at newdream.net>
---
 fs/namei.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/fs/namei.c b/fs/namei.c
index e2e4e8d..72b0370 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2579,11 +2579,11 @@ int vfs_rmdir(struct inode *dir, struct dentry *dentry)
 	if (error)
 		goto out;
 
-	shrink_dcache_parent(dentry);
 	error = dir->i_op->rmdir(dir, dentry);
 	if (error)
 		goto out;
 
+	shrink_dcache_parent(dentry);
 	dentry->d_inode->i_flags |= S_DEAD;
 	dont_mount(dentry);
 
@@ -2994,13 +2994,12 @@ static int vfs_rename_dir(struct inode *old_dir, struct dentry *old_dentry,
 	if (d_mountpoint(old_dentry) || d_mountpoint(new_dentry))
 		goto out;
 
-	if (target)
-		shrink_dcache_parent(new_dentry);
 	error = old_dir->i_op->rename(old_dir, old_dentry, new_dir, new_dentry);
 	if (error)
 		goto out;
 
 	if (target) {
+		shrink_dcache_parent(new_dentry);
 		target->i_flags |= S_DEAD;
 		dont_mount(new_dentry);
 	}
-- 
1.7.0