From: Nick Piggin <npiggin@suse.de>
Date: Mon, 31 May 2010 07:58:02 +0000 (+1000)
Subject: fix setattr error handling in sysfs, configfs
X-Git-Tag: v2.6.35-rc2~6^2~2
X-Git-Url: http://bbs.cooldavid.org/git/?p=net-next-2.6.git;a=commitdiff_plain;h=8718d36cf99f5acf0f37487557ec25aee54b930b

fix setattr error handling in sysfs, configfs

sysfs and configfs setattr functions have error cases after the generic inode's
attributes have been changed. Fix consistency by changing the generic inode
attributes only when it is guaranteed to succeed.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/fs/configfs/inode.c b/fs/configfs/inode.c
index 41645142b88..cf78d44a8d6 100644
--- a/fs/configfs/inode.c
+++ b/fs/configfs/inode.c
@@ -72,10 +72,6 @@ int configfs_setattr(struct dentry * dentry, struct iattr * iattr)
 	if (!sd)
 		return -EINVAL;
 
-	error = simple_setattr(dentry, iattr);
-	if (error)
-		return error;
-
 	sd_iattr = sd->s_iattr;
 	if (!sd_iattr) {
 		/* setting attributes for the first time, allocate now */
@@ -89,9 +85,12 @@ int configfs_setattr(struct dentry * dentry, struct iattr * iattr)
 		sd_iattr->ia_atime = sd_iattr->ia_mtime = sd_iattr->ia_ctime = CURRENT_TIME;
 		sd->s_iattr = sd_iattr;
 	}
-
 	/* attributes were changed atleast once in past */
 
+	error = simple_setattr(dentry, iattr);
+	if (error)
+		return error;
+
 	if (ia_valid & ATTR_UID)
 		sd_iattr->ia_uid = iattr->ia_uid;
 	if (ia_valid & ATTR_GID)
diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c
index bde1a4c3679..0835a3b70e0 100644
--- a/fs/sysfs/inode.c
+++ b/fs/sysfs/inode.c
@@ -117,11 +117,13 @@ int sysfs_setattr(struct dentry *dentry, struct iattr *iattr)
 	if (error)
 		goto out;
 
+	error = sysfs_sd_setattr(sd, iattr);
+	if (error)
+		goto out;
+
 	/* this ignores size changes */
 	generic_setattr(inode, iattr);
 
-	error = sysfs_sd_setattr(sd, iattr);
-
 out:
 	mutex_unlock(&sysfs_mutex);
 	return error;