From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CAAC13D8104; Wed, 17 Jun 2026 11:21:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781695267; cv=none; b=lBRVhDq1tYXh9yUbAP/LzVJbNAv7LXIGET9TePv/HG/HrCBgxDuEjkTLFjzbLzSU2xAawFZWoPVN37faXqCPFr26+uX4u/LY7GYHbdAYFO8QeI4bNPfF8Icpy9Ymu9hrMI1svuFg5rDGvaRzjkO4aDGlViNRGOZM8zqWvp84P+U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781695267; c=relaxed/simple; bh=tJZzMF1Z7aWUxj/SMLB6BgcrfQYSTr8XZcal0HPcp8U=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=sKgRrUJMM4qC/xIwmrsWF3y+/VROQNbKiUaL2CE/6CxXg4VA7ndFaQoZt0ntjBlYDPQzh+rUpBqSuWsuQ+W2H6M3jiLnfh3jcTav76+JbGd1wUa+RD0cuzblAmbjwiRIXk316xV6zw6OwhTP6e60IG5Hjw2FKLTj8KXEfNUNvfE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ijL21kDe; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ijL21kDe" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 25F081F00A3D; Wed, 17 Jun 2026 11:21:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1781695264; bh=VFzRoel95Mk0OMd9ieiVtGk8xEu55dadodVvWCnTMiA=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=ijL21kDexzzyC6kTgJJNIMk9UZljl26RIlsr5eggHWnjRaOFAdklGIqSwuI27JNht ckwVbxBjO5EG1xDJf14h5z/0bvyy5qP34FvlE+ktbW0Pq8weTJr0MA4r7+xR3gN037 7j/ppBJvPIPAbJFldLA88yvyKqlsmlv38mQifanrtjmE+/AgJQS5TwY75xH7bVJQDj FeGS0/cgQc5SqJuI+XU0jpamMSOj8W4Nv5dmJ9dwWxSDcvoYqg+9BLzZlsY0EvzqCp dtyqySQe+UC+r2cDgudo7ICdgHZLoXcIz6j6oLeMk+BJedl83EM233h7dh5DHr+pA6 /T8PgUJpO0KdQ== From: Anand Jain To: fstests@vger.kernel.org Cc: linux-btrfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, zlang@redhat.com, hch@infradead.org, djwong@kernel.org Subject: [PATCH v7 06/11] fstests: verify f_fsid for cloned filesystems Date: Wed, 17 Jun 2026 19:20:33 +0800 Message-ID: <2ac5fb22fd6b51973d11082a1ee8fe354926c63c.1781694879.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 Verify that the cloned filesystem provides an f_fsid that is persistent across mount cycles, yet unique from the original filesystem's f_fsid. Signed-off-by: Anand Jain --- tests/generic/802 | 64 +++++++++++++++++++++++++++++++++++++++++++ tests/generic/802.out | 4 +++ 2 files changed, 68 insertions(+) create mode 100644 tests/generic/802 create mode 100644 tests/generic/802.out diff --git a/tests/generic/802 b/tests/generic/802 new file mode 100644 index 000000000000..910807c11584 --- /dev/null +++ b/tests/generic/802 @@ -0,0 +1,64 @@ +#! /bin/bash +# SPDX-License-Identifier: GPL-2.0 +# Copyright (c) 2026 Anand Jain . All Rights Reserved. +# +# FS QA Test 802 +# Check that the cloned filesystem provides an f_fsid that is persistent +# across mount cycles if the block device maj:min remains unchanged. + +. ./common/preamble + +_begin_fstest auto quick mount clone + +_require_test +_require_block_device $TEST_DEV +_require_loop + +_fixed_by_fs_commit btrfs xxxxxxxxxxxx \ + "btrfs: use on-disk uuid for s_uuid in temp_fsid mounts" +_fixed_by_fs_commit btrfs xxxxxxxxxxxx \ + "btrfs: derive f_fsid from on-disk fsuuid and dev_t" + +_cleanup() +{ + cd / + rm -r -f $tmp.* + umount $mnt1 $mnt2 2>/dev/null + _loop_image_destroy "${devs[@]}" 2> /dev/null +} + +# Setup base loop device and its clone +devs=() +_loop_image_create_clone devs +mkdir -p $TEST_DIR/$seq +mnt1=$TEST_DIR/$seq/mnt1 +mnt2=$TEST_DIR/$seq/mnt2 +mkdir -p $mnt1 +mkdir -p $mnt2 + +# Mount both filesystems simultaneously using mandatory clone mount options +_mount $(_common_dev_mount_options) $(_clone_mount_option) ${devs[0]} $mnt1 || \ + _fail "Failed to mount dev1" +_mount $(_common_dev_mount_options) $(_clone_mount_option) ${devs[1]} $mnt2 || \ + _fail "Failed to mount dev2" + +# Capture baseline filesystem IDs for comparison +fsid_scratch=$(stat -f -c "%i" $mnt1) +fsid_clone=$(stat -f -c "%i" $mnt2) + +# Verify that the fsids remain stable after a mount cycle, even when the +# mount order is reversed. +echo "**** fsid after mount cycle ****" +_unmount $mnt1 +_unmount $mnt2 +_mount $(_common_dev_mount_options) $(_clone_mount_option) ${devs[1]} $mnt2 || \ + _fail "Failed to mount dev2" +_mount $(_common_dev_mount_options) $(_clone_mount_option) ${devs[0]} $mnt1 || \ + _fail "Failed to mount dev1" + +# Compare post mount-cycle values against the baseline +stat -f -c "%i" $mnt1 | sed -e "s/$fsid_scratch/FSID_SCRATCH/g" +stat -f -c "%i" $mnt2 | sed -e "s/$fsid_clone/FSID_CLONE/g" + +status=0 +exit diff --git a/tests/generic/802.out b/tests/generic/802.out new file mode 100644 index 000000000000..0202a9a2c108 --- /dev/null +++ b/tests/generic/802.out @@ -0,0 +1,4 @@ +QA output created by 802 +**** fsid after mount cycle **** +FSID_SCRATCH +FSID_CLONE -- 2.43.0