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Message-Id: <20060801235252.777964C5@localhost.localdomain>
Date:	Tue, 01 Aug 2006 16:52:52 -0700
From:	Dave Hansen <haveblue@...ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	viro@....linux.org.uk, herbert@...hfloor.at, hch@...radead.org,
	Dave Hansen <haveblue@...ibm.com>
Subject: [PATCH 16/28] sys_linkat(): elevate write count around vfs_link()



Signed-off-by: Dave Hansen <haveblue@...ibm.com>
---

 lxc-dave/fs/namei.c |    5 +++++
 1 files changed, 5 insertions(+)

diff -puN fs/namei.c~C-elevate-writers-vfs_link-part1 fs/namei.c
--- lxc/fs/namei.c~C-elevate-writers-vfs_link-part1	2006-08-01 16:35:24.000000000 -0700
+++ lxc-dave/fs/namei.c	2006-08-01 16:35:25.000000000 -0700
@@ -2326,7 +2326,12 @@ asmlinkage long sys_linkat(int olddfd, c
 	error = PTR_ERR(new_dentry);
 	if (IS_ERR(new_dentry))
 		goto out_unlock;
+	error = mnt_want_write(nd.mnt);
+	if (error)
+		goto out_dput;
 	error = vfs_link(old_nd.dentry, nd.dentry->d_inode, new_dentry);
+	mnt_drop_write(nd.mnt);
+out_dput:
 	dput(new_dentry);
 out_unlock:
 	mutex_unlock(&nd.dentry->d_inode->i_mutex);
_
-
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