[Cluster-devel] [GFS2] Fix symlink creation race

[Cluster-devel] [GFS2] Fix symlink creation race

[Steven Whitehouse]

From 1f9e88dbdb4812fa5046fb1336bb71673187e28d Mon Sep 17 00:00:00 2001
From: Steven Whitehouse <swhiteho@redhat.com>
Date: Tue, 31 Mar 2009 16:06:27 +0100
Subject: [PATCH] [GFS2] Fix symlink creation race

In certain cases symlinks can appear to have zero size if a lookup
on the inode occurs within a certain (very short) time after the
symlink has been created. The symlink is correctly created on disk
but appears to have zero size when stat()ed. This patch closes the
race and prevents incorrect sizes appearing.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c
index abd5429..1c70fa5 100644
--- a/fs/gfs2/ops_inode.c
+++ b/fs/gfs2/ops_inode.c
@@ -371,6 +371,7 @@ static int gfs2_symlink(struct inode *dir, struct dentry *dentry,
 	ip = ghs[1].gh_gl->gl_object;
 
 	ip->i_disksize = size;
+	i_size_write(inode, size);
 
 	error = gfs2_meta_inode_buffer(ip, &dibh);
 
-- 
1.6.0.6