From: Erez Zadok <ezk@cs.sunysb.edu>
Date: Tue, 16 Aug 2011 02:45:37 +0000 (-0400)
Subject: Unionfs: support LOOKUP_RCU in ->d_revalidate
X-Git-Url: https://git.fsl.cs.sunysb.edu/?a=commitdiff_plain;h=c76f648dad690b5156971d93dce318a78f2831fc;p=unionfs-2.6.39.y.git

Unionfs: support LOOKUP_RCU in ->d_revalidate

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

diff --git a/fs/unionfs/dentry.c b/fs/unionfs/dentry.c
index c0205a45bcc..1628dad9050 100644
--- a/fs/unionfs/dentry.c
+++ b/fs/unionfs/dentry.c
@@ -315,12 +315,15 @@ bool is_newer_lower(const struct dentry *dentry)
 }
 
 static int unionfs_d_revalidate(struct dentry *dentry,
-				struct nameidata *nd_unused)
+				struct nameidata *nd)
 {
 	bool valid = true;
 	int err = 1;		/* 1 means valid for the VFS */
 	struct dentry *parent;
 
+	if (nd && nd->flags & LOOKUP_RCU)
+		return -ECHILD;
+
 	unionfs_read_lock(dentry->d_sb, UNIONFS_SMUTEX_CHILD);
 	parent = unionfs_lock_parent(dentry, UNIONFS_DMUTEX_PARENT);
 	unionfs_lock_dentry(dentry, UNIONFS_DMUTEX_CHILD);