Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932580Ab0FYTLq (ORCPT ); Fri, 25 Jun 2010 15:11:46 -0400 Received: from mx1.redhat.com ([209.132.183.28]:21474 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932395Ab0FYTGm (ORCPT ); Fri, 25 Jun 2010 15:06:42 -0400 From: Valerie Aurora To: Alexander Viro Cc: Miklos Szeredi , Jan Blunck , Christoph Hellwig , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, Valerie Aurora Subject: [PATCH 37/38] union-mount: Implement union-aware setxattr() Date: Fri, 25 Jun 2010 12:05:27 -0700 Message-Id: <1277492728-11446-38-git-send-email-vaurora@redhat.com> In-Reply-To: <1277492728-11446-1-git-send-email-vaurora@redhat.com> References: <1277492728-11446-1-git-send-email-vaurora@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1590 Lines: 69 --- fs/xattr.c | 34 +++++++++++++++++++++++++++------- 1 files changed, 27 insertions(+), 7 deletions(-) diff --git a/fs/xattr.c b/fs/xattr.c index 46f87e8..66bb5c7 100644 --- a/fs/xattr.c +++ b/fs/xattr.c @@ -19,7 +19,7 @@ #include #include #include - +#include "union.h" /* * Check permissions for extended attribute access. This is a bit complicated @@ -281,17 +281,37 @@ SYSCALL_DEFINE5(setxattr, const char __user *, pathname, size_t, size, int, flags) { struct path path; + struct nameidata nd; + struct vfsmount *mnt; + char *tmp; int error; - error = user_path(pathname, &path); + error = user_path_nd(AT_FDCWD, pathname, LOOKUP_FOLLOW, &nd, &path, + &tmp); if (error) return error; - error = mnt_want_write(path.mnt); - if (!error) { - error = setxattr(path.dentry, name, value, size, flags); - mnt_drop_write(path.mnt); - } + + if (IS_DIR_UNIONED(nd.path.dentry)) + mnt = nd.path.mnt; + else + mnt = path.mnt; + + error = mnt_want_write(mnt); + if (error) + goto out; + + error = union_copyup(&nd, &path); + if (error) + goto out_drop_write; + + error = setxattr(path.dentry, name, value, size, flags); + +out_drop_write: + mnt_drop_write(mnt); +out: path_put(&path); + path_put(&nd.path); + putname(tmp); return error; } -- 1.6.3.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/