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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright (c) 2021 Oracle. All Rights Reserved.
#
# FS QA Test No. 635
#
# Make sure we can store and retrieve timestamps on the extremes of the
# date ranges supported by userspace, and the common places where overflows
# can happen. This test also ensures that the timestamps are persisted
# correctly after a shutdown.
#
# This differs from generic/402 in that we don't constrain ourselves to the
# range that the filesystem claims to support; we attempt various things that
# /userspace/ can parse, and then check that the vfs clamps and persists the
# values correctly.
#
# NOTE: Old kernels (pre 5.4) allow filesystems to truncate timestamps silently
# when writing timestamps to disk! This test detects this silent truncation
# and fails. If you see a failure on such a kernel, contact your distributor
# for an update.
. ./common/preamble
_begin_fstest auto quick atime bigtime shutdown
# Import common functions.
# real QA test starts here
_supported_fs generic
_require_scratch
_require_scratch_shutdown
_scratch_mkfs > $seqres.full
_scratch_mount
# Does our userspace even support large dates?
test_bigdates=1
touch -d 'May 30 01:53:03 UTC 2514' $SCRATCH_MNT 2>/dev/null || test_bigdates=0
# And can we do statx?
test_statx=1
($XFS_IO_PROG -c 'help statx' | grep -q 'Print raw statx' && \
$XFS_IO_PROG -c 'statx -r' $SCRATCH_MNT 2>/dev/null | grep -q 'stat.mtime') || \
test_statx=0
echo "Userspace support of large timestamps: $test_bigdates" >> $seqres.full
echo "xfs_io support of statx: $test_statx" >> $seqres.full
touchme() {
local arg="$1"
local name="$2"
echo "$arg" > $SCRATCH_MNT/t_$name
touch -d "$arg" $SCRATCH_MNT/t_$name
}
report() {
local files=($SCRATCH_MNT/t_*)
for file in "${files[@]}"; do
echo "${file}: $(cat "${file}")"
TZ=UTC stat -c '%y %Y %n' "${file}"
test $test_statx -gt 0 && \
$XFS_IO_PROG -c 'statx -r' "${file}" | grep 'stat.mtime'
done
}
# -2147483648 (S32_MIN, or classic unix min)
touchme 'Dec 13 20:45:52 UTC 1901' s32_min
# 2147483647 (S32_MAX, or classic unix max)
touchme 'Jan 19 03:14:07 UTC 2038' s32_max
# 7956915742, all twos
touchme 'Feb 22 22:22:22 UTC 2222' all_twos
if [ $test_bigdates -gt 0 ]; then
# 16299260424 (u64 nsec counter from s32_min, like xfs does)
touchme 'Tue Jul 2 20:20:24 UTC 2486' u64ns_from_s32_min
# 15032385535 (u34 time if you start from s32_min, like ext4 does)
touchme 'May 10 22:38:55 UTC 2446' u34_from_s32_min
# 17179869183 (u34 time if you start from the unix epoch)
touchme 'May 30 01:53:03 UTC 2514' u34_max
# Latest date we can synthesize(?)
touchme 'Dec 31 23:59:59 UTC 2147483647' abs_max_time
# Earliest date we can synthesize(?)
touchme 'Jan 1 00:00:00 UTC 0' abs_min_time
fi
# Query timestamps from incore
echo before >> $seqres.full
report > $tmp.before_crash
cat $tmp.before_crash >> $seqres.full
_scratch_shutdown -f
_scratch_cycle_mount
# Query timestamps from disk
echo after >> $seqres.full
report > $tmp.after_crash
cat $tmp.after_crash >> $seqres.full
# Did they match?
cmp -s $tmp.before_crash $tmp.after_crash
# success, all done
status=0
exit
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