From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7BC19ECE58D for ; Mon, 7 Oct 2019 13:19:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5CA7D2084D for ; Mon, 7 Oct 2019 13:19:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727010AbfJGNTj (ORCPT ); Mon, 7 Oct 2019 09:19:39 -0400 Received: from mx1.redhat.com ([209.132.183.28]:38346 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727442AbfJGNTj (ORCPT ); Mon, 7 Oct 2019 09:19:39 -0400 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 93FC118CB8F9 for ; Mon, 7 Oct 2019 13:19:39 +0000 (UTC) Received: from bfoster.bos.redhat.com (dhcp-41-2.bos.redhat.com [10.18.41.2]) by smtp.corp.redhat.com (Postfix) with ESMTP id 517561001B30 for ; Mon, 7 Oct 2019 13:19:39 +0000 (UTC) From: Brian Foster To: linux-xfs@vger.kernel.org Subject: [PATCH v2 1/3] xfs: log the inode on directory sf to block format change Date: Mon, 7 Oct 2019 09:19:36 -0400 Message-Id: <20191007131938.23839-2-bfoster@redhat.com> In-Reply-To: <20191007131938.23839-1-bfoster@redhat.com> References: <20191007131938.23839-1-bfoster@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.63]); Mon, 07 Oct 2019 13:19:39 +0000 (UTC) Sender: linux-xfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org When a directory changes from shortform (sf) to block format, the sf format is copied to a temporary buffer, the inode format is modified and the updated format filled with the dentries from the temporary buffer. If the inode format is modified and attempt to grow the inode fails (due to I/O error, for example), it is possible to return an error while leaving the directory in an inconsistent state and with an otherwise clean transaction. This results in corruption of the associated directory and leads to xfs_dabuf_map() errors as subsequent lookups cannot accurately determine the format of the directory. This problem is reproduced occasionally by generic/475. The fundamental problem is that xfs_dir2_sf_to_block() changes the on-disk inode format without logging the inode. The inode is eventually logged by the bmapi layer in the common case, but error checking introduces the possibility of failing the high level request before this happens. Update both of the dir2 and attr callers of xfs_bmap_local_to_extents_empty() to log the inode core as consistent with the bmap local to extent format change codepath. This ensures that any subsequent errors after the format has changed cause the transaction to abort. Signed-off-by: Brian Foster --- fs/xfs/libxfs/xfs_attr_leaf.c | 1 + fs/xfs/libxfs/xfs_dir2_block.c | 1 + 2 files changed, 2 insertions(+) diff --git a/fs/xfs/libxfs/xfs_attr_leaf.c b/fs/xfs/libxfs/xfs_attr_leaf.c index b9f019603d0b..36c0a32cefcf 100644 --- a/fs/xfs/libxfs/xfs_attr_leaf.c +++ b/fs/xfs/libxfs/xfs_attr_leaf.c @@ -827,6 +827,7 @@ xfs_attr_shortform_to_leaf( xfs_idata_realloc(dp, -size, XFS_ATTR_FORK); xfs_bmap_local_to_extents_empty(dp, XFS_ATTR_FORK); + xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE); bp = NULL; error = xfs_da_grow_inode(args, &blkno); diff --git a/fs/xfs/libxfs/xfs_dir2_block.c b/fs/xfs/libxfs/xfs_dir2_block.c index 9595ced393dc..3d1e5f6d64fd 100644 --- a/fs/xfs/libxfs/xfs_dir2_block.c +++ b/fs/xfs/libxfs/xfs_dir2_block.c @@ -1098,6 +1098,7 @@ xfs_dir2_sf_to_block( xfs_idata_realloc(dp, -ifp->if_bytes, XFS_DATA_FORK); xfs_bmap_local_to_extents_empty(dp, XFS_DATA_FORK); dp->i_d.di_size = 0; + xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); /* * Add block 0 to the inode. -- 2.20.1