generic: test swapfile creation, activation, and deactivation

Test swapfile activation and deactivation.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>

tests/generic/472

@@ -0,0 +1,91 @@
+#! /bin/bash
+# FS QA Test No. 472
+#
+# Test various swapfile activation oddities.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2018 Oracle.  All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it would be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write the Free Software Foundation,
+# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+#
+#-----------------------------------------------------------------------
+
+seq=`basename $0`
+seqres=$RESULT_DIR/$seq
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=/tmp/$$
+status=1	# failure is the default!
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_cleanup()
+{
+	cd /
+	swapoff $swapfile 2> /dev/null
+	rm -f $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+
+# remove previous $seqres.full before test
+rm -f $seqres.full
+
+# real QA test starts here
+_supported_fs generic
+_supported_os Linux
+_require_scratch_swapfile
+_require_test_program mkswap
+_require_test_program swapon
+
+rm -f $seqres.full
+_scratch_mkfs >>$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>> $seeqres.full
+	rm -f $swapfile
+}
+
+# Create a regular swap file
+echo "regular swap" | tee -a $seqres.full
+_pwrite_byte 0x58 0 $len $swapfile >> $seqres.full
+swapfile_cycle $swapfile
+
+# Create a swap file with a little too much junk on the end
+echo "too long swap" | tee -a $seqres.full
+_pwrite_byte 0x58 0 $((len + 3)) $swapfile >> $seqres.full
+swapfile_cycle $swapfile
+
+# Create a ridiculously small swap file.  Each swap file must have at least
+# two pages after the header page.
+echo "tiny swap" | tee -a $seqres.full
+tiny_len=$((page_size * 3))
+_pwrite_byte 0x58 0 $tiny_len $swapfile >> $seqres.full
+swapfile_cycle $swapfile
+
+status=0
+exit

tests/generic/472.out

@@ -0,0 +1,4 @@
+QA output created by 472
+regular swap
+too long swap
+tiny swap

tests/generic/496

@@ -0,0 +1,94 @@
+#! /bin/bash
+# FS QA Test No. 496
+#
+# Test various swapfile activation oddities on filesystems that support
+# fallocated swapfiles.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2018 Oracle.  All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it would be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write the Free Software Foundation,
+# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+#
+#-----------------------------------------------------------------------
+
+seq=`basename $0`
+seqres=$RESULT_DIR/$seq
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=/tmp/$$
+status=1	# failure is the default!
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_cleanup()
+{
+	cd /
+	swapoff $swapfile 2> /dev/null
+	rm -f $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+
+# remove previous $seqres.full before test
+rm -f $seqres.full
+
+# real QA test starts here
+_supported_fs generic
+_supported_os Linux
+_require_scratch_swapfile
+_require_test_program mkswap
+_require_test_program swapon
+_require_xfs_io_command "falloc"
+
+rm -f $seqres.full
+_scratch_mkfs >>$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>> $seeqres.full
+	rm -f $swapfile
+}
+
+# Create a fallocated swap file
+echo "fallocate swap" | tee -a $seqres.full
+$XFS_IO_PROG -f -c "falloc 0 $len" $swapfile >> $seqres.full
+$CHATTR_PROG +C $swapfile >> $seqres.full 2>&1
+"$here/src/mkswap" $swapfile
+"$here/src/swapon" $swapfile >> $seqres.full 2>&1 || \
+	_notrun "fallocated swap not supported here"
+swapoff $swapfile
+
+# Create a fallocated swap file and touch every other $PAGE_SIZE to create
+# a mess of written/unwritten extent records
+echo "mixed swap" | tee -a $seqres.full
+$XFS_IO_PROG -f -c "falloc 0 $len" $swapfile >> $seqres.full
+seq $page_size $((page_size * 2)) $len | while read offset; do
+	_pwrite_byte 0x58 $offset 1 $swapfile >> $seqres.full
+done
+swapfile_cycle $swapfile
+
+status=0
+exit

tests/generic/496.out

@@ -0,0 +1,3 @@
+QA output created by 496
+fallocate swap
+mixed swap

tests/generic/497

@@ -0,0 +1,98 @@
+#! /bin/bash
+# FS QA Test No. 497
+#
+# Test various swapfile activation oddities, having used fcollapse to
+# create discontiguous ranges in the file.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2018 Oracle.  All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it would be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write the Free Software Foundation,
+# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+#
+#-----------------------------------------------------------------------
+
+seq=`basename $0`
+seqres=$RESULT_DIR/$seq
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=/tmp/$$
+status=1	# failure is the default!
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_cleanup()
+{
+	cd /
+	swapoff $swapfile 2> /dev/null
+	rm -f $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+
+# remove previous $seqres.full before test
+rm -f $seqres.full
+
+# real QA test starts here
+_supported_fs generic
+_supported_os Linux
+_require_scratch_swapfile
+_require_test_program mkswap
+_require_test_program swapon
+_require_xfs_io_command "fcollapse"
+
+rm -f $seqres.full
+_scratch_mkfs >>$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>> $seeqres.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 >> $seqres.full
+old_sz="$(stat -c '%s' $swapfile)"
+$XFS_IO_PROG -c "fcollapse $((len / 2)) $len" $swapfile >> $seqres.full 2>&1
+new_sz="$(stat -c '%s' $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 >> $seqres.full
+old_sz="$(stat -c '%s' $swapfile)"
+$XFS_IO_PROG -c "fcollapse 66560 1024" $swapfile >> $seqres.full 2>&1
+new_sz="$(stat -c '%s' $swapfile)"
+if [ $old_sz -gt $new_sz ]; then
+	swapfile_cycle $swapfile
+fi
+rm -f $swapfile
+
+status=0
+exit

tests/generic/497.out

@@ -0,0 +1,3 @@
+QA output created by 497
+large discontig swap
+small discontig swap

tests/generic/group

@@ -474,6 +474,7 @@
 469 auto quick
 470 auto quick dax
 471 auto quick rw
+472 auto quick swap
 473 broken
 474 auto quick shutdown metadata
 475 shutdown auto log metadata
@@ -497,3 +498,5 @@
 493 auto quick swap
 494 auto quick swap punch
 495 auto quick swap
+496 auto quick swap
+497 auto quick swap collapse