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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2020 Facebook. All Rights Reserved.
#
# FS QA Test 218
#
# Regression test for the problem fixed by the patch
#
# btrfs: init device stats for seed devices
#
# Make a seed device, add a sprout to it, and then make sure we can still read
# the device stats for both devices after we remount with the new sprout device.
#
. ./common/preamble
_begin_fstest auto quick volume
# Import common functions.
. ./common/filter
. ./common/filter.btrfs
# real QA test starts here
# Modify as appropriate.
_supported_fs btrfs
_require_test
_require_scratch_dev_pool 2
_scratch_dev_pool_get 2
dev_seed=$(echo $SCRATCH_DEV_POOL | awk '{print $1}')
dev_sprout=$(echo $SCRATCH_DEV_POOL | awk '{print $2}')
# Create the seed device
_mkfs_dev $dev_seed
_mount $dev_seed $SCRATCH_MNT
$XFS_IO_PROG -f -d -c "pwrite -S 0xab 0 1M" $SCRATCH_MNT/foo > /dev/null
$BTRFS_UTIL_PROG filesystem show -m $SCRATCH_MNT | \
_filter_btrfs_filesystem_show
_scratch_unmount
$BTRFS_TUNE_PROG -S 1 $dev_seed
# Mount the seed device and add the rw device
_mount -o ro $dev_seed $SCRATCH_MNT
_run_btrfs_util_prog device add -f $dev_sprout $SCRATCH_MNT >> $seqres.full
$BTRFS_UTIL_PROG device stats $SCRATCH_MNT | _filter_scratch_pool
_scratch_unmount
# Now remount, validate the device stats do not fail
_mount $dev_sprout $SCRATCH_MNT
$BTRFS_UTIL_PROG device stats $SCRATCH_MNT | _filter_scratch_pool
_scratch_dev_pool_put
# success, all done
status=0
exit
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