From: Jeff Layton <jlayton@redhat.com>
Date: Tue, 11 Dec 2012 17:10:15 +0000 (-0500)
Subject: vfs: allow lsetxattr() to retry once on ESTALE errors
X-Git-Url: http://git.mmlx.us/?a=commitdiff_plain;h=49e09e1cc576daa99ea22f3a3c699062c34f8c0f;p=linux-edison.git

vfs: allow lsetxattr() to retry once on ESTALE errors

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/fs/xattr.c b/fs/xattr.c
index c5e90d2d751..74d36e063c8 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -394,8 +394,9 @@ SYSCALL_DEFINE5(lsetxattr, const char __user *, pathname,
 {
 	struct path path;
 	int error;
-
-	error = user_lpath(pathname, &path);
+	unsigned int lookup_flags = 0;
+retry:
+	error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path);
 	if (error)
 		return error;
 	error = mnt_want_write(path.mnt);
@@ -404,6 +405,10 @@ SYSCALL_DEFINE5(lsetxattr, const char __user *, pathname,
 		mnt_drop_write(path.mnt);
 	}
 	path_put(&path);
+	if (retry_estale(error, lookup_flags)) {
+		lookup_flags |= LOOKUP_REVAL;
+		goto retry;
+	}
 	return error;
 }