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 <[email protected]> --- 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 <[email protected]>. 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 _______________________________________________ Linux-f2fs-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
