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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2018 Facebook. All Rights Reserved.
#
# FS QA Test 176
#
# Test device remove/replace with an active swap file.
#
. ./common/preamble
_begin_fstest auto quick swap volume
# Import common functions.
. ./common/filter
# real QA test starts here
# Modify as appropriate.
_supported_fs btrfs
_require_scratch_dev_pool 3
_require_scratch_swapfile
# We check the filesystem manually because we move devices around.
rm -f "${RESULT_DIR}/require_scratch"
scratch_dev1="$(echo "${SCRATCH_DEV_POOL}" | $AWK_PROG '{ print $1 }')"
scratch_dev2="$(echo "${SCRATCH_DEV_POOL}" | $AWK_PROG '{ print $2 }')"
scratch_dev3="$(echo "${SCRATCH_DEV_POOL}" | $AWK_PROG '{ print $3 }')"
echo "Remove device"
_scratch_mkfs >> $seqres.full 2>&1
_scratch_mount
_format_swapfile "$SCRATCH_MNT/swap" $(($(get_page_size) * 10)) > /dev/null
$BTRFS_UTIL_PROG device add -f "$scratch_dev2" "$SCRATCH_MNT" >> $seqres.full
swapon "$SCRATCH_MNT/swap" 2>&1 | _filter_scratch
# We know the swap file is on device 1 because we added device 2 after it was
# already created.
$BTRFS_UTIL_PROG device delete "$scratch_dev1" "$SCRATCH_MNT" 2>&1 | grep -o "Text file busy"
# Deleting/readding device 2 should still work.
$BTRFS_UTIL_PROG device delete "$scratch_dev2" "$SCRATCH_MNT"
$BTRFS_UTIL_PROG device add -f "$scratch_dev2" "$SCRATCH_MNT" >> $seqres.full
swapoff "$SCRATCH_MNT/swap" > /dev/null 2>&1
# Deleting device 1 should work again after swapoff.
$BTRFS_UTIL_PROG device delete "$scratch_dev1" "$SCRATCH_MNT"
_scratch_unmount
_check_scratch_fs "$scratch_dev2"
echo "Replace device"
_scratch_mkfs >> $seqres.full 2>&1
_scratch_mount
_format_swapfile "$SCRATCH_MNT/swap" $(($(get_page_size) * 10)) > /dev/null
$BTRFS_UTIL_PROG device add -f "$scratch_dev2" "$SCRATCH_MNT" >> $seqres.full
swapon "$SCRATCH_MNT/swap" 2>&1 | _filter_scratch
# Again, we know the swap file is on device 1.
$BTRFS_UTIL_PROG replace start -fB "$scratch_dev1" "$scratch_dev3" "$SCRATCH_MNT" 2>&1 | grep -o "Text file busy"
# Replacing device 2 should still work.
$BTRFS_UTIL_PROG replace start -fB "$scratch_dev2" "$scratch_dev3" "$SCRATCH_MNT" \
>> $seqres.full
swapoff "$SCRATCH_MNT/swap" > /dev/null 2>&1
# Replacing device 1 should work again after swapoff.
$BTRFS_UTIL_PROG replace start -fB "$scratch_dev1" "$scratch_dev2" "$SCRATCH_MNT" \
>> $seqres.full
_scratch_unmount
_check_scratch_fs "$scratch_dev2"
# success, all done
status=0
exit
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