commit a15a3f6fc67d910f43098acec6e19d25a37d7cb9
author Al Viro <viro@www.linux.org.uk> Mon Jun 06 13:36:08 2005 -0700
committer Linus Torvalds <torvalds@ppc970.osdl.org> Mon Jun 06 14:42:26 2005 -0700
tree f00e6a3f505f2e77568695f6f5e2bd4786fcc8ca
parent 2f12dbfbb6286c725c283a169f8f05e89a86848b

[PATCH] namei fixes (12/19)

In open_namei() we take mntput(nd->mnt);nd->mnt=path.mnt; out of the if
(__follow_mount(...)), making it conditional on nd->mnt != path.mnt instead.

Then we shift the result downstream.

Equivalent transformations.

Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

fs/namei.c

diff --git a/fs/namei.c b/fs/namei.c
index 907a3f2..37fcf94 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1506,8 +1506,6 @@
 			mntput(path.mnt);
 			goto exit;
 		}
-		mntput(nd->mnt);
-		nd->mnt = path.mnt;
 	}
 	error = -ENOENT;
 	if (!path.dentry->d_inode)
@@ -1517,6 +1515,9 @@
 
 	dput(nd->dentry);
 	nd->dentry = path.dentry;
+	if (nd->mnt != path.mnt)
+		mntput(nd->mnt);
+	nd->mnt = path.mnt;
 	error = -EISDIR;
 	if (path.dentry->d_inode && S_ISDIR(path.dentry->d_inode->i_mode))
 		goto exit;
@@ -1528,6 +1529,9 @@
 
 exit_dput:
 	dput(path.dentry);
+	if (nd->mnt != path.mnt)
+		mntput(nd->mnt);
+	nd->mnt = path.mnt;
 exit:
 	path_release(nd);
 	return error;
@@ -1550,6 +1554,9 @@
 	error = security_inode_follow_link(path.dentry, nd);
 	if (error)
 		goto exit_dput;
+	if (nd->mnt != path.mnt)
+		mntput(nd->mnt);
+	nd->mnt = path.mnt;
 	error = __do_follow_link(&path, nd);
 	if (error)
 		return error;