{"id":2228767,"url":"http://patchwork.ozlabs.org/api/patches/2228767/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-ext4/patch/8751efbeb7edd81e56e2b60886ae00e47f26fdfd.1777281778.git.asj@kernel.org/","project":{"id":8,"url":"http://patchwork.ozlabs.org/api/projects/8/?format=json","name":"Linux ext4 filesystem development","link_name":"linux-ext4","list_id":"linux-ext4.vger.kernel.org","list_email":"linux-ext4@vger.kernel.org","web_url":null,"scm_url":null,"webscm_url":null,"list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<8751efbeb7edd81e56e2b60886ae00e47f26fdfd.1777281778.git.asj@kernel.org>","list_archive_url":null,"date":"2026-04-27T10:19:41","name":"[v3,9/9] fstests: btrfs: test UUID consistency for clones with metadata_uuid","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"5c2b9035230863d2a53a50a59633a559a9eac148","submitter":{"id":92722,"url":"http://patchwork.ozlabs.org/api/people/92722/?format=json","name":"Anand Jain","email":"asj@kernel.org"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-ext4/patch/8751efbeb7edd81e56e2b60886ae00e47f26fdfd.1777281778.git.asj@kernel.org/mbox/","series":[{"id":501620,"url":"http://patchwork.ozlabs.org/api/series/501620/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-ext4/list/?series=501620","date":"2026-04-27T10:19:32","name":"fstests: add test coverage for cloned filesystem ids","version":3,"mbox":"http://patchwork.ozlabs.org/series/501620/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2228767/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2228767/checks/","tags":{},"related":[],"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-ext4@vger.kernel.org"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","patchwork-incoming@ozlabs.org"],"Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=Q+tgfaMx;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=ozlabs.org\n (client-ip=2404:9400:2221:ea00::3; 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arc=none smtp.client-ip=10.30.226.201"],"DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n\ts=k20201202; t=1777285214;\n\tbh=+I4Av7ppRNVv1NUfWD+fNWXpFrT7K2fec1Lb09meN10=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=Q+tgfaMxHeOTM0wASqTJSHXn8E4E8qLwUFWsVsQmT1bkJCamcaR9ZYOCw+y2mdm/Y\n\t UyMsOgNAjbbQZyfZ9/4tV5xLPrH/amBm0r/m2LJrNTRJlR//C8M+vFhUdAjzhRr/YW\n\t GBZbSOKtxKC8kNwRuOFE+doFyjGUOrvQ9gv/fu9AWGSR8pigk2MDxtmGWqcvTM9Bk9\n\t TBxrmKO1scHjE1ILspIEOeU/6Dg5q3II+rCCqy78BBVNVaLk2BCQ1C9SECi4SFZN1W\n\t xI477PzXKW8G4CnIb4V/oYMOP1UFScBoZu5TeXA0SF5BXtxOsV36YDTELIvEE3vHre\n\t +DFlRnaxcRD3Q==","From":"Anand Jain ","To":"fstests@vger.kernel.org","Cc":"linux-btrfs@vger.kernel.org,\n\tlinux-ext4@vger.kernel.org,\n\tlinux-xfs@vger.kernel.org,\n\tlinux-f2fs@vger.kernel.org,\n\tamir73il@gmail.com,\n\tzlang@redhat.com,\n\thch@infradead.org","Subject":"[PATCH v3 9/9] fstests: btrfs: test UUID consistency for clones with\n metadata_uuid","Date":"Mon, 27 Apr 2026 18:19:41 +0800","Message-ID":"\n <8751efbeb7edd81e56e2b60886ae00e47f26fdfd.1777281778.git.asj@kernel.org>","X-Mailer":"git-send-email 2.43.0","In-Reply-To":"","References":"","Precedence":"bulk","X-Mailing-List":"linux-ext4@vger.kernel.org","List-Id":"","List-Subscribe":"","List-Unsubscribe":"","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","X-Spam-Status":"No, score=-1.2 required=5.0 tests=ARC_SIGNED,ARC_VALID,\n\tDKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DMARC_PASS,\n\tMAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=disabled\n\tversion=4.0.1","X-Spam-Checker-Version":"SpamAssassin 4.0.1 (2024-03-25) on gandalf.ozlabs.org"},"content":"Btrfs uses the metadata_uuid superblock feature to change the on-disk UUID\nwithout rewriting every block header. This patch adds a sanity check to\nensure UUID consistency when a filesystem with metadata_uuid enabled is\ncloned.\n\nSigned-off-by: Anand Jain \n---\n tests/btrfs/348 | 91 +++++++++++++++++++++++++++++++++++++++++++++\n tests/btrfs/348.out | 19 ++++++++++\n 2 files changed, 110 insertions(+)\n create mode 100644 tests/btrfs/348\n create mode 100644 tests/btrfs/348.out","diff":"diff --git a/tests/btrfs/348 b/tests/btrfs/348\nnew file mode 100644\nindex 000000000000..cfa56fdb4a4a\n--- /dev/null\n+++ b/tests/btrfs/348\n@@ -0,0 +1,91 @@\n+#! /bin/bash\n+# SPDX-License-Identifier: GPL-2.0\n+# Copyright (c) 2026 Anand Jain . All Rights Reserved.\n+#\n+# FS QA Test 348\n+#\n+# Verify that the cloned filesystem UUID remains consistent, even when the\n+# `metadata_uuid` feature is enabled.\n+#\n+\n+. ./common/preamble\n+. ./common/filter\n+\n+_begin_fstest auto quick mount clone\n+\n+_require_test\n+_require_loop\n+\n+_cleanup()\n+{\n+\tcd /\n+\trm -r -f $tmp.*\n+\tumount $mnt1 $mnt2 2>/dev/null\n+\t_loop_image_destroy \"${devs[@]}\" 2> /dev/null\n+}\n+\n+filter_pool()\n+{\n+\tsed -e \"s|${devs[0]}|DEV1|g\" -e \"s|${mnt1}|MNT1|g\" \\\n+\t -e \"s|${devs[1]}|DEV2|g\" -e \"s|${mnt2}|MNT2|g\" | _filter_spaces\n+}\n+\n+pre_clone_tune()\n+{\n+\tlocal temp_mnt=$TEST_DIR/${seq}_mnt\n+\n+\t_require_command \"$BTRFS_TUNE_PROG\" btrfstune\n+\tmkdir -p $temp_mnt\n+\t_mount ${devs[0]} $temp_mnt\n+\t$BTRFS_UTIL_PROG subvolume create $temp_mnt/sv1 &> /dev/null\n+\t_unmount $temp_mnt\n+\trm -r -f $temp_mnt\n+\n+\t$BTRFS_TUNE_PROG -m ${devs[0]}\n+}\n+\n+print_info()\n+{\n+\tlocal mntpt=$1\n+\tlocal tgt=$(findmnt -no SOURCE $mntpt)\n+\tlocal fsuuid=$(blkid -s UUID -o value $tgt)\n+\n+\techo \"mntpt=$mntpt tgt=$tgt fsuuid=$fsuuid\" >> $seqres.full\n+\techo\n+\tfindmnt -o SOURCE,TARGET,UUID \"$tgt\" | tail -n +2 | \\\n+\t\t\t\tsed -e \"s/${fsuuid}/FSUUID/g\" | filter_pool\n+\tawk -v dev=\"$tgt\" '$1 == dev { print $1, $2 }' /proc/self/mounts | \\\n+\t\t\t\t\t\t\t\tfilter_pool\n+\tdf --all --output=source,target \"$tgt\" | tail -n +2 | filter_pool\n+}\n+\n+devs=()\n+_loop_image_create_clone devs pre_clone_tune\n+mkdir -p $TEST_DIR/$seq\n+mnt1=$TEST_DIR/$seq/mnt1\n+mnt2=$TEST_DIR/$seq/mnt2\n+mkdir -p $mnt1\n+mkdir -p $mnt2\n+\n+_mount $(_common_dev_mount_options) $(_clone_mount_option) ${devs[0]} $mnt1 || \\\n+\t\t\t\t\t\t_fail \"Failed to mount dev1\"\n+_mount $(_common_dev_mount_options) $(_clone_mount_option) ${devs[1]} $mnt2 || \\\n+\t\t\t\t\t\t_fail \"Failed to mount dev2\"\n+\n+print_info $mnt1\n+print_info $mnt2\n+\n+echo\n+echo \"**** mount cycle ****\"\n+_unmount $mnt1\n+_unmount $mnt2\n+_mount $(_common_dev_mount_options) $(_clone_mount_option) ${devs[1]} $mnt2 || \\\n+\t\t\t\t\t\t_fail \"Failed to mount dev2\"\n+_mount $(_common_dev_mount_options) $(_clone_mount_option) ${devs[0]} $mnt1 || \\\n+\t\t\t\t\t\t_fail \"Failed to mount dev1\"\n+\n+print_info $mnt1\n+print_info $mnt2\n+\n+status=0\n+exit\ndiff --git a/tests/btrfs/348.out b/tests/btrfs/348.out\nnew file mode 100644\nindex 000000000000..4b102e986246\n--- /dev/null\n+++ b/tests/btrfs/348.out\n@@ -0,0 +1,19 @@\n+QA output created by 348\n+\n+DEV1 MNT1 FSUUID\n+DEV1 MNT1\n+DEV1 MNT1\n+\n+DEV2 MNT2 FSUUID\n+DEV2 MNT2\n+DEV2 MNT2\n+\n+**** mount cycle ****\n+\n+DEV1 MNT1 FSUUID\n+DEV1 MNT1\n+DEV1 MNT1\n+\n+DEV2 MNT2 FSUUID\n+DEV2 MNT2\n+DEV2 MNT2\n","prefixes":["v3","9/9"]}