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=-16.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 DCEA2C433F5 for ; Wed, 15 Sep 2021 23:42:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C6C1861164 for ; Wed, 15 Sep 2021 23:42:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233094AbhIOXn0 (ORCPT ); Wed, 15 Sep 2021 19:43:26 -0400 Received: from mail.kernel.org ([198.145.29.99]:45348 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233162AbhIOXnZ (ORCPT ); Wed, 15 Sep 2021 19:43:25 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 3A0BD60F25; Wed, 15 Sep 2021 23:42:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1631749326; bh=J6afXhYUJhfjvhm0Oj2J5P5yH5fOBL3R9W15pHLq2Lg=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=E3n+Zp84s+IH+rZrj35kM78Ny/4SQylyOb+EdqPYID9OQ/O3/p4agepAr+KpFDIhs pDqOTqt7Bq7Wmh8utzJWAm6TzbVrapncfI4MGkJV4Bu6sWZtq09KGxpzMr4itTyIJ7 wr/vquWyeKUR9toFBs6OAWY9c9EW3x9VdO/p4plekeSrGyX7jFll2DYyRgWzcZLPke JmiaEsFSmoEKZESDD82HlMfdJSxJ7+GQq06tOaofaWWU30qH15+QdeBWNUwNcc9LN/ g4+AF0i4lg1XcNvo/xxrFif6cR9CfaBiWGueOAHBctwCfqBt98N63l3sTDIqFz4ixH DQElebDKeJ7yQ== Subject: [PATCH 1/1] common/rc: re-fix detection of device-mapper/persistent memory incompatibility From: "Darrick J. Wong" To: djwong@kernel.org, guaneryu@gmail.com Cc: linux-xfs@vger.kernel.org, fstests@vger.kernel.org, guan@eryu.me Date: Wed, 15 Sep 2021 16:42:06 -0700 Message-ID: <163174932597.379383.18426474248994143835.stgit@magnolia> In-Reply-To: <163174932046.379383.10637812567210248503.stgit@magnolia> References: <163174932046.379383.10637812567210248503.stgit@magnolia> User-Agent: StGit/0.19 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org From: Darrick J. Wong In commit e05491b3, I tried to resolve false test failures that were a result of device mapper refusing to change access modes on a block device that supports the FSDAX access mode. Unfortunately, I did not realize that there are two ways that fsdax support can be detected via sysfs: /sys/block/XXX/queue/dax and /sys/block/XXX/dax/, so I only added a test for the latter. As of 5.15-rc1 this doesn't seem to work anymore for some reason. I don't know enough about the byzantine world of pmem device driver initialization, but fsdax mode actually does work even though the /sys/block/XXX/dax/ path went away. So clearly we have to detect it via the other sysfs path. Fixes: e05491b3 ("common/rc: fix detection of device-mapper/persistent memory incompatibility") Signed-off-by: Darrick J. Wong --- common/rc | 18 +++++++++++++++--- 1 file changed, 15 insertions(+), 3 deletions(-) diff --git a/common/rc b/common/rc index 154bc2dd..275b1f24 100644 --- a/common/rc +++ b/common/rc @@ -1964,6 +1964,20 @@ _require_sane_bdev_flush() fi } +# Decide if the scratch filesystem is likely to be mounted in fsdax mode. +# If there's a dax clause in the mount options we assume the test runner +# wants us to test DAX; or if the scratch device itself advertises dax mode +# in sysfs. +__detect_scratch_fsdax() +{ + _normalize_mount_options | egrep -q "dax(=always| |$)" && return 0 + + local sysfs="/sys/block/$(_short_dev $SCRATCH_DEV)" + test -e "${sysfs}/dax" && return 0 + test "$(cat "${sysfs}/queue/dax" 2>/dev/null)" = "1" && return 0 + return 1 +} + # this test requires a specific device mapper target _require_dm_target() { @@ -1975,9 +1989,7 @@ _require_dm_target() _require_sane_bdev_flush $SCRATCH_DEV _require_command "$DMSETUP_PROG" dmsetup - _normalize_mount_options | egrep -q "dax(=always| |$)" || \ - test -e "/sys/block/$(_short_dev $SCRATCH_DEV)/dax" - if [ $? -eq 0 ]; then + if __detect_scratch_fsdax; then case $target in stripe|linear|log-writes) ;;