Verify how findmnt, df (libblkid) resolve device paths when multiple block devices share the same FSUUID.
Signed-off-by: Anand Jain <[email protected]> --- tests/generic/803 | 84 +++++++++++++++++++++++++++++++++++++++++++ tests/generic/803.out | 19 ++++++++++ 2 files changed, 103 insertions(+) create mode 100644 tests/generic/803 create mode 100644 tests/generic/803.out diff --git a/tests/generic/803 b/tests/generic/803 new file mode 100644 index 000000000000..b304a2743604 --- /dev/null +++ b/tests/generic/803 @@ -0,0 +1,84 @@ +#! /bin/bash +# SPDX-License-Identifier: GPL-2.0 +# Copyright (c) 2026 Anand Jain <[email protected]>. All Rights Reserved. +# +# FS QA Test 803 +# Verify how libblkid resolve devices when multiple devices sharing the +# same FSUUID. + +. ./common/preamble +. ./common/filter + +_begin_fstest auto quick mount clone + +_require_test +_require_block_device $TEST_DEV +_require_loop + +_cleanup() +{ + cd / + rm -r -f $tmp.* + umount $mnt1 $mnt2 2>/dev/null + _loop_image_destroy "${devs[@]}" 2> /dev/null +} + +# Normalize pool devices and mount points names +filter_pool() +{ + sed -e "s|${devs[0]}|DEV1|g" -e "s|${mnt1}|MNT1|g" \ + -e "s|${devs[1]}|DEV2|g" -e "s|${mnt2}|MNT2|g" | _filter_spaces +} + +# Collect and print device tracking info from findmnt, /proc/mounts, and df. +# This checks whether user-space tools get confused or remain accurate when +# resolving a duplicate/cloned filesystem UUID. +print_info() +{ + local mntpt=$1 + local tgt=$(findmnt -no SOURCE $mntpt) + local fsuuid=$(blkid -s UUID -o value $tgt) + + echo "mntpt=$mntpt tgt=$tgt fsuuid=$fsuuid" >> $seqres.full + echo + findmnt -o SOURCE,TARGET,UUID "$tgt" | tail -n +2 | \ + sed -e "s/${fsuuid}/FSUUID/g" | filter_pool + awk -v dev="$tgt" '$1 == dev { print $1, $2 }' /proc/self/mounts | \ + filter_pool + df --all --output=source,target "$tgt" | tail -n +2 | filter_pool +} + +# 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 identical UUID filesystems simultaneously +_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" + +print_info $mnt1 +print_info $mnt2 + +# Cycle mounts and reverse the initialization order to see if libblkid / findmnt +# resolution changes based on mount order. +echo +echo "**** 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" + +print_info $mnt1 +print_info $mnt2 + +status=0 +exit diff --git a/tests/generic/803.out b/tests/generic/803.out new file mode 100644 index 000000000000..20a1cb36a213 --- /dev/null +++ b/tests/generic/803.out @@ -0,0 +1,19 @@ +QA output created by 803 + +DEV1 MNT1 FSUUID +DEV1 MNT1 +DEV1 MNT1 + +DEV2 MNT2 FSUUID +DEV2 MNT2 +DEV2 MNT2 + +**** mount cycle **** + +DEV1 MNT1 FSUUID +DEV1 MNT1 +DEV1 MNT1 + +DEV2 MNT2 FSUUID +DEV2 MNT2 +DEV2 MNT2 -- 2.43.0 _______________________________________________ Linux-f2fs-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
