Date:   Fri, 30 Oct 2020 01:22:52 +0530
From:   Ritesh Harjani <riteshh@...ux.ibm.com>
To:     fstests@...r.kernel.org
Cc:     anju@...ux.vnet.ibm.com, Eryu Guan <guan@...u.me>,
        linux-ext4@...r.kernel.org, linux-btrfs@...r.kernel.org,
        linux-xfs@...r.kernel.org, Ritesh Harjani <riteshh@...ux.ibm.com>
Subject: [PATCH 2/3] shared/001: Verify swapon on fallocated files for supported FS

Currently generic/496 tests if swapon works with fallocated files or not
on the given FS and bails out with _not_run if it doesn't. Due to this
2 of the regressions went unnoticed in ext4.
Hence this test is created specifically for FS (ext4, xfs) which does
support swap functionality on unwritten extents to report an error
if it swapon fails with fallocated fils.

Signed-off-by: Ritesh Harjani <riteshh@...ux.ibm.com>
---
 tests/shared/001     | 97 ++++++++++++++++++++++++++++++++++++++++++++
 tests/shared/001.out |  6 +++
 tests/shared/group   |  1 +
 3 files changed, 104 insertions(+)
 create mode 100755 tests/shared/001
 create mode 100644 tests/shared/001.out

diff --git a/tests/shared/001 b/tests/shared/001
new file mode 100755
index 000000000000..ad7285bdb709
--- /dev/null
+++ b/tests/shared/001
@@ -0,0 +1,97 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2018 Oracle.  All Rights Reserved.
+#
+# FS QA Test 001
+#
+# This is similar to generic/472 and generic/496.
+# Except that generic/496 is modified to focefully verify if
+# swap works on fallocate files for given supported filesystems
+# or not instead of bailing out with _not_run, if swapon cmd fails.
+# Modified by Ritesh Harjani <riteshh@...ux.ibm.com>
+#
+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 $seqres.full
+
+# Modify as appropriate.
+_supported_fs ext4 xfs
+_require_scratch_swapfile
+_require_test_program mkswap
+_require_test_program swapon
+_require_xfs_io_command "falloc"
+
+_scratch_mkfs >>$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"
+
+	if [ $# -eq 2 ]; then
+		local len="$2"
+		_pwrite_byte 0x58 0 $len $swapfile >> $seqres.full
+	fi
+	"$here/src/mkswap" $swapfile >> $seqres.full
+	"$here/src/swapon" $swapfile 2>&1 | _filter_scratch
+	swapoff $swapfile 2>> $seqres.full
+	rm -f $swapfile
+}
+
+# from here similar to generic/472
+touch $swapfile
+
+# Create a regular swap file
+echo "regular swap" | tee -a $seqres.full
+swapfile_cycle $swapfile $len
+
+# Create a swap file with a little too much junk on the end
+echo "too long swap" | tee -a $seqres.full
+swapfile_cycle $swapfile $((len + 3))
+
+# 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
+swapfile_cycle $swapfile $(($(get_page_size) * 3))
+
+# From here similar to generic/496
+echo "fallocate swap" | tee -a $seqres.full
+$XFS_IO_PROG -f -c "falloc 0 $len" $swapfile >> $seqres.full
+"$here/src/mkswap" $swapfile
+"$here/src/swapon" $swapfile 2>&1 | _filter_scratch
+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
+
+# success, all done
+status=0
+exit
diff --git a/tests/shared/001.out b/tests/shared/001.out
new file mode 100644
index 000000000000..2d7655e19422
--- /dev/null
+++ b/tests/shared/001.out
@@ -0,0 +1,6 @@
+QA output created by 001
+regular swap
+too long swap
+tiny swap
+fallocate swap
+mixed swap
diff --git a/tests/shared/group b/tests/shared/group
index a8b926d877d2..5a41b23c7010 100644
--- a/tests/shared/group
+++ b/tests/shared/group
@@ -3,6 +3,7 @@
 # - do not start group names with a digit
 # - comment line before each group is "new" description
 #
+001 auto swap quick
 002 auto metadata quick log
 032 mkfs auto quick
 298 auto trim
--
2.26.2

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