linux-kernel - [PATCH] VFS: fix statfs() automounter semantics regression

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Message-Id: <1320189791-21634-2-git-send-email-dpmcgee@gmail.com>
Date:	Tue,  1 Nov 2011 18:23:11 -0500
From:	Dan McGee <dpmcgee@...il.com>
To:	Alexander Viro <viro@...iv.linux.org.uk>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	dave@...hlinux.org, tom@...hlinux.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Trond Myklebust <Trond.Myklebust@...app.com>
Subject: [PATCH] VFS: fix statfs() automounter semantics regression

No one in their right mind would expect statfs() to not work on a
automounter managed mount point. Fix it.

This mirrors the fix made to the quota code in 815d405ceff0d69646.

Signed-off-by: Dan McGee <dpmcgee@...il.com>
---
 fs/statfs.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/fs/statfs.c b/fs/statfs.c
index 8244924..9cf04a1 100644
--- a/fs/statfs.c
+++ b/fs/statfs.c
@@ -76,7 +76,7 @@ EXPORT_SYMBOL(vfs_statfs);
 int user_statfs(const char __user *pathname, struct kstatfs *st)
 {
 	struct path path;
-	int error = user_path(pathname, &path);
+	int error = user_path_at(AT_FDCWD, pathname, LOOKUP_FOLLOW|LOOKUP_AUTOMOUNT, &path);
 	if (!error) {
 		error = vfs_statfs(&path, st);
 		path_put(&path);
-- 
1.7.7.1

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