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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2018 Oracle. All Rights Reserved.
#
# FS QA Test No. 497
#
# Test various swapfile activation oddities, having used fcollapse to
# create discontiguous ranges in the file.
#
. ./common/preamble
_begin_fstest auto quick swap collapse
# Override the default cleanup function.
_cleanup()
{
cd /
swapoff $swapfile 2> /dev/null
rm -f $tmp.*
}
# Import common functions.
. ./common/filter
# real QA test starts here
_supported_fs generic
_require_scratch_swapfile
_require_test_program mkswap
_require_test_program swapon
_require_xfs_io_command "fcollapse"
_scratch_mkfs >>$seqres.full 2>&1
_scratch_mount >>$seqres.full 2>&1
swapfile=$SCRATCH_MNT/swap
len=$((2 * 1048576))
page_size=$(_get_page_size)
swapfile_cycle() {
local swapfile="$1"
# Swap files must be nocow on Btrfs.
$CHATTR_PROG +C $swapfile >> $seqres.full 2>&1
"$here/src/mkswap" $swapfile >> $seqres.full
"$here/src/swapon" $swapfile 2>&1 | _filter_scratch
swapoff $swapfile 2>> $seqres.full
rm -f $swapfile
}
# Create a swap file with a large discontiguous range(?)
echo "large discontig swap" | tee -a $seqres.full
_pwrite_byte 0x58 0 $((len * 2)) $swapfile >> $seqres.full
old_sz="$(_get_filesize $swapfile)"
$XFS_IO_PROG -c "fcollapse $((len / 2)) $len" $swapfile >> $seqres.full 2>&1
new_sz="$(_get_filesize $swapfile)"
if [ $old_sz -gt $new_sz ]; then
swapfile_cycle $swapfile
fi
rm -f $swapfile
# Create a swap file with a small discontiguous range(?)
echo "small discontig swap" | tee -a $seqres.full
_pwrite_byte 0x58 0 $((len + 1024)) $swapfile >> $seqres.full
old_sz="$(_get_filesize $swapfile)"
$XFS_IO_PROG -c "fcollapse 66560 1024" $swapfile >> $seqres.full 2>&1
new_sz="$(_get_filesize $swapfile)"
if [ $old_sz -gt $new_sz ]; then
swapfile_cycle $swapfile
fi
rm -f $swapfile
status=0
exit
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