From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 8B79F279DC3; Thu, 26 Feb 2026 14:42:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772116930; cv=none; b=gYzYZClgSRTNJPcc4THiiGMgFTgqGzZIcD5XXyjO4CwAT5WyT+WyI6iB9vmi80bZmBkRK8G4J3isEGLydr3JcfRD83CQzftqT6cgHDeMFQvAbfu2p/0bfKCNOqVTipfH1GN3w1Nta9GnkDnKNM9PC7YG/bJc1g9mCCDaJm5lQsc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772116930; c=relaxed/simple; bh=2ZmxX7pxYyToLaM0kh6Q31uX32r3aDcpfs6SLFBHw8c=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=EfH0Zrbfsz9+b9tJidVdFpAa/Do6C3KuQlRn1AIq3Fl7RPeBWy1RdiuEQ/fbjL1tNtarZx2HId85d0cleHlIZF3PbC9kYM4P47KkFuDMG7Vmc+sLWcUSAFX4Ybu4+nvioMYiEb3G6Rwhmi1tiVyynnwjP1X2zqFPvpabu8vvyFY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=MgLn1GGm; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="MgLn1GGm" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 31BD8C19422; Thu, 26 Feb 2026 14:42:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772116930; bh=2ZmxX7pxYyToLaM0kh6Q31uX32r3aDcpfs6SLFBHw8c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MgLn1GGmXlopNeZADkXyeSb8rWhahNx5GWQYz68Vv8bjr+AzFgyIqbSsqx6DriZYa NxMcTt0U5K4Rr83rgb0EJ49+y05TlUoV46ZNetDogE64AI1YObYeUScuv0YQ/VRHhO lrwOsCEu8LvEgyOQo4JgJm6HvnfKDk4HvLNJ3arwEPRJ5Wh4uMy8dQsSNHEB0ih44P ZnqSv69iw0Y8hPC6isjGCqkDC9sj9yyijBh7LnUfF8NOqPiTGRhjreWbYMnLSX3NBn x5r/fvDk3MnKgfdz5zjROrafEu47LpFLJZwzGHwsxF6WLjxtKEZ3sZQf2U6Pqd+bcJ pEtcD1huw8WlA== From: Anand Jain To: fstests@vger.kernel.org Cc: linux-btrfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org Subject: [PATCH 6/9] fstests: verify f_fsid for cloned filesystems Date: Thu, 26 Feb 2026 22:41:47 +0800 Message-ID: <76e1856d716608e14809bf04cd5259dad341518d.1772095513.git.asj@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-btrfs@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/792 | 57 +++++++++++++++++++++++++++++++++++++++++++ tests/generic/792.out | 7 ++++++ 2 files changed, 64 insertions(+) create mode 100644 tests/generic/792 create mode 100644 tests/generic/792.out diff --git a/tests/generic/792 b/tests/generic/792 new file mode 100644 index 000000000000..3a2f463dc76e --- /dev/null +++ b/tests/generic/792 @@ -0,0 +1,57 @@ +#! /bin/bash +# SPDX-License-Identifier: GPL-2.0 +# Copyright (c) 2026 Anand Jain . All Rights Reserved. +# +# FS QA Test 792 +# Verify f_fsid and s_uuid of cloned filesystems across mount cycle. + +. ./common/preamble + +_begin_fstest auto quick mount clone + +_require_test +_require_scratch_dev_pool 2 + +[ "$FSTYP" = "btrfs" ] && _fixed_by_kernel_commit xxxxxxxxxxxx \ + "btrfs: use on-disk uuid for s_uuid in temp_fsid mounts" +[ "$FSTYP" = "btrfs" ] && _fixed_by_kernel_commit xxxxxxxxxxxx \ + "btrfs: derive f_fsid from on-disk fsuuid and dev_t" + +_cleanup() +{ + cd / + rm -r -f $tmp.* + umount $mnt2 2>/dev/null + _scratch_dev_pool_put +} + +_scratch_dev_pool_get 2 +_scratch_mkfs_sized_clone >$seqres.full 2>&1 +devs=($SCRATCH_DEV_POOL) +mnt2=$TEST_DIR/mnt2 +mkdir -p $mnt2 + +_scratch_mount $(_clone_mount_option) +_mount $(_common_dev_mount_options) $(_clone_mount_option) ${devs[1]} $mnt2 || \ + _fail "Failed to mount dev2" + +fsid_scratch=$(stat -f -c "%i" $SCRATCH_MNT) +fsid_clone=$(stat -f -c "%i" $mnt2) + +echo "**** fsid initially ****" +echo $fsid_scratch | sed -e "s/$fsid_scratch/FSID_SCRATCH/g" +echo $fsid_clone | sed -e "s/$fsid_clone/FSID_CLONE/g" + +# Make sure fsid still match across a mount cycle, also reverse the order. +echo "**** fsid after mount cycle ****" +_scratch_unmount +_unmount $mnt2 +_mount $(_common_dev_mount_options) $(_clone_mount_option) ${devs[1]} $mnt2 || \ + _fail "Failed to mount dev2" +_scratch_mount $(_clone_mount_option) + +stat -f -c "%i" $SCRATCH_MNT | sed -e "s/$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/792.out b/tests/generic/792.out new file mode 100644 index 000000000000..27ecbce2225e --- /dev/null +++ b/tests/generic/792.out @@ -0,0 +1,7 @@ +QA output created by 792 +**** fsid initially **** +FSID_SCRATCH +FSID_CLONE +**** fsid after mount cycle **** +FSID_SCRATCH +FSID_CLONE -- 2.43.0