From: Erez Zadok <ezk@cs.sunysb.edu>
Date: Mon, 19 Feb 2007 04:57:45 +0000 (-0500)
Subject: [PATCH] fs/stack.c: Copy i_nlink after all other attributes are copied
X-Git-Tag: v2.6.21-rc1~60
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=a6e6df25ec6751f4f73784398ab7d43cf9d2019f;p=linux-2.6-omap-h63xx.git

[PATCH] fs/stack.c: Copy i_nlink after all other attributes are copied

A user-specified get_nlinks may depend on other inode attributes.

Cc: Michael Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
Signed-off-by: Josef 'Jeff' Sipek <jsipek@cs.sunysb.edu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/fs/stack.c b/fs/stack.c
index 8ffb880d2f4..67716f6a1a4 100644
--- a/fs/stack.c
+++ b/fs/stack.c
@@ -20,11 +20,6 @@ EXPORT_SYMBOL_GPL(fsstack_copy_inode_size);
 void fsstack_copy_attr_all(struct inode *dest, const struct inode *src,
 				int (*get_nlinks)(struct inode *))
 {
-	if (!get_nlinks)
-		dest->i_nlink = src->i_nlink;
-	else
-		dest->i_nlink = (*get_nlinks)(dest);
-
 	dest->i_mode = src->i_mode;
 	dest->i_uid = src->i_uid;
 	dest->i_gid = src->i_gid;
@@ -34,5 +29,14 @@ void fsstack_copy_attr_all(struct inode *dest, const struct inode *src,
 	dest->i_ctime = src->i_ctime;
 	dest->i_blkbits = src->i_blkbits;
 	dest->i_flags = src->i_flags;
+
+	/*
+	 * Update the nlinks AFTER updating the above fields, because the
+	 * get_links callback may depend on them.
+	 */
+	if (!get_nlinks)
+		dest->i_nlink = src->i_nlink;
+	else
+		dest->i_nlink = (*get_nlinks)(dest);
 }
 EXPORT_SYMBOL_GPL(fsstack_copy_attr_all);