{"id":2228768,"url":"http://patchwork.ozlabs.org/api/patches/2228768/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-ext4/patch/05ace38b54ea49f462bcd6274c4a2528192e6949.1777281778.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":"<05ace38b54ea49f462bcd6274c4a2528192e6949.1777281778.git.asj@kernel.org>","list_archive_url":null,"date":"2026-04-27T10:19:33","name":"[v3,1/9] fstests: add _loop_image_create_clone() helper","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"31da1fca1024f1c793779d5a3a003e80e59baddb","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/05ace38b54ea49f462bcd6274c4a2528192e6949.1777281778.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/2228768/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2228768/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=KqSFxQI0;\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=1777285197;\n\tbh=TudFNrJ7xMN4t5aKEhti1ZuJdx6eszXGY1fn2YNMtMM=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=KqSFxQI0eBLR8WvX6VXiJegb7KGUSeV/bs6S+/KKrw+6ot6W4RwLP/0bCY4A6koBS\n\t qsTyNRDzBNblheGaWJFpYwyY+FSK6UNyEA0hTcmZWxQ8FrBPTV2PX7CDNlY3X04+qI\n\t ePRJVi9GerXung5D+MW+MpB5D6VaF0ojZlrcQxz3huN/Q7wskVWV3Eoh61zISnGVkb\n\t j3wfT0CKupQo/9nfVjJtMnuqfNpCs8HnRUrTq3a1+8HbiFoJKEp7atZ84kwZ/2pTQl\n\t XEg1YsuvqiLNBI9Pd1JGJF60qWAlPKZM0BXhyg2MSJDMgpUsRyLBwk6WCq+SBeHw8W\n\t roWj9tztd1bNQ==","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 1/9] fstests: add _loop_image_create_clone() helper","Date":"Mon, 27 Apr 2026 18:19:33 +0800","Message-ID":"\n <05ace38b54ea49f462bcd6274c4a2528192e6949.1777281778.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":"Introduce _loop_image_create_clone() and _loop_image_destroy() to mkfs an\nimage file and clone it to another image file, and attach a loop device to\nthem. And its destroy part.\n\nSigned-off-by: Anand Jain \n---\n common/rc | 44 ++++++++++++++++++++++++++++++++++++++++++++\n 1 file changed, 44 insertions(+)","diff":"diff --git a/common/rc b/common/rc\nindex 9632b211b58f..0e7b7eb1d98f 100644\n--- a/common/rc\n+++ b/common/rc\n@@ -1503,6 +1503,50 @@ _scratch_resvblks()\n \tesac\n }\n \n+_loop_image_create_clone()\n+{\n+\tlocal -n _ret=$1\n+\tlocal pre_clone_tune_func=$2\n+\tlocal img_file=$TEST_DIR/${seq}.img\n+\tlocal img_file_clone=$TEST_DIR/${seq}_clone.img\n+\tlocal size=$(_small_fs_size_mb 128) # Smallest possible\n+\tlocal loop_devs\n+\n+\tsize=$((size * 1024 * 1024))\n+\t$XFS_IO_PROG -f -c \"truncate $size\" $img_file\n+\n+\tloop_devs=$(_create_loop_device $img_file)\n+\t_ret=($loop_devs)\n+\n+\tcase $FSTYP in\n+\txfs)\n+\t\t_mkfs_dev \"-s size=4096\" $img_file\n+\t\t;;\n+\tbtrfs)\n+\t\t_mkfs_dev $img_file\n+\t\t;;\n+\t*)\n+\t\t_mkfs_dev $img_file\n+\t\t;;\n+\tesac\n+\n+\t($pre_clone_tune_func)\n+\n+\tcp $img_file $img_file_clone\n+\n+\tloop_devs=\"$loop_devs $(_create_loop_device $img_file_clone)\"\n+\n+\t_ret=($loop_devs)\n+}\n+\n+_loop_image_destroy()\n+{\n+\tfor d in \"$@\"; do\n+\t\tlocal f=$(losetup --noheadings --output BACK-FILE $d)\n+\t\t_destroy_loop_device \"$d\"\n+\t\t[ -n \"$f\" ] && rm -f \"$f\"\n+\tdone\n+}\n \n # Repair scratch filesystem. Returns 0 if the FS is good to go (either no\n # errors found or errors were fixed) and nonzero otherwise; also spits out\n","prefixes":["v3","1/9"]}