From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.redhat.com ([209.132.183.28]:31371 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729155AbfGIUJB (ORCPT ); Tue, 9 Jul 2019 16:09:01 -0400 From: Eric Sandeen Subject: [PATCH] mkfs: don't use xfs_verify_fsbno() before m_sb is fully set up Message-ID: Date: Tue, 9 Jul 2019 15:09:00 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-xfs-owner@vger.kernel.org List-ID: List-Id: xfs To: linux-xfs , Dave Chinner , "Darrick J. Wong" Commit 8da5298 mkfs: validate start and end of aligned logs stopped open-coding log end block checks, and used xfs_verify_fsbno() instead. It also used xfs_verify_fsbno() to validate the log start. This seemed to make sense, but then xfs/306 started failing on 4k sector filesystems, which leads to a log striep unite being set on a single AG filesystem. As it turns out, if xfs_verify_fsbno() is testing a block in the last AG, it needs to have mp->m_sb.sb_dblocks set, which isn't done until later. With sb_dblocks unset we can't know how many blocks are in the last AG, and hence can't validate it. To fix all this, go back to open-coding the checks; note that this /does/ rely on m_sb.sb_agblklog being set, but that /is/ already done in the early call to start_superblock_setup(). Fixes: 8da5298 ("mkfs: validate start and end of aligned logs") Reported-by: Dave Chinner Signed-off-by: Eric Sandeen --- Sorry for missing this one in regression testing :/ diff --git a/mkfs/xfs_mkfs.c b/mkfs/xfs_mkfs.c index 468b8fde..4e576a5c 100644 --- a/mkfs/xfs_mkfs.c +++ b/mkfs/xfs_mkfs.c @@ -3040,7 +3040,7 @@ align_internal_log( cfg->logstart = ((cfg->logstart + (sunit - 1)) / sunit) * sunit; /* If our log start overlaps the next AG's metadata, fail. */ - if (!xfs_verify_fsbno(mp, cfg->logstart)) { + if (XFS_FSB_TO_AGBNO(mp, cfg->logstart) <= XFS_AGFL_BLOCK(mp)) { fprintf(stderr, _("Due to stripe alignment, the internal log start (%lld) cannot be aligned\n" "within an allocation group.\n"), @@ -3051,10 +3051,9 @@ _("Due to stripe alignment, the internal log start (%lld) cannot be aligned\n" /* round up/down the log size now */ align_log_size(cfg, sunit); - /* check the aligned log still fits in an AG. */ + /* check the aligned log still starts and ends in the same AG. */ logend = cfg->logstart + cfg->logblocks - 1; - if (XFS_FSB_TO_AGNO(mp, cfg->logstart) != XFS_FSB_TO_AGNO(mp, logend) || - !xfs_verify_fsbno(mp, logend)) { + if (XFS_FSB_TO_AGNO(mp, cfg->logstart) != XFS_FSB_TO_AGNO(mp, logend)) { fprintf(stderr, _("Due to stripe alignment, the internal log size (%lld) is too large.\n" "Must fit within an allocation group.\n"),