From patchwork Fri May 8 00:16:23 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: NeilBrown X-Patchwork-Id: 6361561 Return-Path: X-Original-To: patchwork-linux-btrfs@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id D13CDBEEE1 for ; Fri, 8 May 2015 00:50:51 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 0259820361 for ; Fri, 8 May 2015 00:50:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 10B98203AF for ; Fri, 8 May 2015 00:50:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752101AbbEHAup (ORCPT ); Thu, 7 May 2015 20:50:45 -0400 Received: from cantor2.suse.de ([195.135.220.15]:56832 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751922AbbEHAul (ORCPT ); Thu, 7 May 2015 20:50:41 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 7E46EAD21; Fri, 8 May 2015 00:50:39 +0000 (UTC) From: NeilBrown To: Josef Bacik , Chris Mason , Jan Kara , David Sterba , Ryusuke Konishi Date: Fri, 08 May 2015 10:16:23 +1000 Subject: [PATCH 3/3] UDF: support NFSv2 export Cc: linux-fsdevel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-nilfs@vger.kernel.org, linux-kernel@vger.kernel.org, linux-btrfs@vger.kernel.org Message-ID: <20150508001623.31129.24710.stgit@notabene.brown> In-Reply-To: <20150508001142.31129.7604.stgit@notabene.brown> References: <20150508001142.31129.7604.stgit@notabene.brown> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The "fh_len" passed to ->fh_to_* is not guaranteed to be that same as that returned by encode_fh - it may be larger. With NFSv2, the filehandle is fixed length, so it may appear longer than expected and be zero-padded. So we must test that fh_len is at least some value, not exactly equal to it. Signed-off-by: NeilBrown --- fs/udf/namei.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/fs/udf/namei.c b/fs/udf/namei.c index 5c03f0dfb98b..facc2a840f7b 100644 --- a/fs/udf/namei.c +++ b/fs/udf/namei.c @@ -1221,7 +1221,7 @@ static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block, static struct dentry *udf_fh_to_dentry(struct super_block *sb, struct fid *fid, int fh_len, int fh_type) { - if ((fh_len != 3 && fh_len != 5) || + if (fh_len < 3 || (fh_type != FILEID_UDF_WITH_PARENT && fh_type != FILEID_UDF_WITHOUT_PARENT)) return NULL; @@ -1233,7 +1233,7 @@ static struct dentry *udf_fh_to_dentry(struct super_block *sb, static struct dentry *udf_fh_to_parent(struct super_block *sb, struct fid *fid, int fh_len, int fh_type) { - if (fh_len != 5 || fh_type != FILEID_UDF_WITH_PARENT) + if (fh_len < 5 || fh_type != FILEID_UDF_WITH_PARENT) return NULL; return udf_nfs_get_inode(sb, fid->udf.parent_block,