From: Rachita Kothiyal <rachita@dewey.fsl.cs.sunysb.edu>
Date: Fri, 29 Feb 2008 17:01:57 +0000 (-0500)
Subject: Unionfs: follow_link locking fixes
X-Git-Url: https://git.fsl.cs.sunysb.edu/?a=commitdiff_plain;h=66ae7851f3efc8a8ef04143a929b300614fee3cf;p=unionfs-odf.git

Unionfs: follow_link locking fixes

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
---

diff --git a/fs/unionfs/inode.c b/fs/unionfs/inode.c
index 06eb84270f..c456f30010 100644
--- a/fs/unionfs/inode.c
+++ b/fs/unionfs/inode.c
@@ -717,7 +717,11 @@ static void *unionfs_follow_link(struct dentry *dentry, struct nameidata *nd)
 	err = 0;
 
 out:
-	unionfs_check_dentry(dentry);
+	if (!err) {
+		unionfs_lock_dentry(dentry, UNIONFS_DMUTEX_CHILD);
+		unionfs_check_dentry(dentry);
+		unionfs_unlock_dentry(dentry);
+	}
 	unionfs_check_nd(nd);
 	return ERR_PTR(err);
 }