#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2021 Oracle.  All Rights Reserved.
#
# FS QA Test No. 541
#
# Regression test for kernel commits:
#
# 83193e5ebb01 ("xfs: correct the narrative around misaligned rtinherit/extszinherit dirs")
# 5aa5b278237f ("xfs: don't expose misaligned extszinherit hints to userspace")
# 0e2af9296f4f ("xfs: improve FSGROWFSRT precondition checking")
# 0925fecc5574 ("xfs: fix an integer overflow error in xfs_growfs_rt")
# b102a46ce16f ("xfs: detect misaligned rtinherit directory extent size hints")
#
# Test for xfs_growfs to make sure that we can add a realtime device and set
# its extent size hint at the same time.
#
. ./common/preamble
_begin_fstest auto quick realtime growfs

# Import common functions.
. ./common/filter

# real QA test starts here

# Modify as appropriate.
_supported_fs xfs
_require_realtime
_require_scratch

# Format scratch fs with no realtime section.
SCRATCH_RTDEV="" _scratch_mkfs | _filter_mkfs 2> $tmp.mkfs >> $seqres.full
_scratch_mount

# Check that there's no realtime section.
source $tmp.mkfs
test $rtblocks -eq 0 || echo "expected 0 rtblocks, got $rtblocks"

# Compute a new rt extent size and a separate rt extent size hint to exercise
# the code that ignores hints that aren't a multiple of the extent size.
XFS_MAX_RTEXTSIZE=$((1024 * 1024 * 1024))
new_rtextsz=$((rtextsz + dbsize))
if [ $new_rtextsz -gt $XFS_MAX_RTEXTSIZE ]; then
	new_rtextsz=$((rtextsz - dbsize))
fi
new_rtextsz_blocks=$(( new_rtextsz / dbsize ))

new_extszhint=$((rtextsz * 2))
if [ $new_extszhint -eq $new_rtextsz ]; then
	new_extszhint=$((rtextsz * 3))
fi

# Set the inheritable extent size hint and rt status.
$XFS_IO_PROG -c 'chattr +t' -c "extsize $new_extszhint" $SCRATCH_MNT

# Check that the hint was set correctly
after_extszhint=$($XFS_IO_PROG -c 'stat' $SCRATCH_MNT | \
	grep 'fsxattr.extsize' | cut -d ' ' -f 3)
test $after_extszhint -eq $new_extszhint || \
	echo "expected extszhint $new_extszhint, got $after_extszhint"

# Add a realtime section and change the extent size.
echo $XFS_GROWFS_PROG -e $new_rtextsz_blocks -r $SCRATCH_MNT >> $seqres.full
$XFS_GROWFS_PROG -e $new_rtextsz_blocks -r $SCRATCH_MNT >> $seqres.full 2> $tmp.growfs
res=$?
cat $tmp.growfs

# If the growfs failed, skip the post-test check because the scratch fs does
# not have SCRATCH_RTDEV configured.  If the kernel didn't support adding the
# rt volume, skip everything else.
if [ $res -ne 0 ]; then
	rm -f ${RESULT_DIR}/require_scratch
	if grep -q "Operation not supported" $tmp.growfs; then
		_notrun "growfs not supported on rt volume"
	fi
fi

# Now that the root directory's extsize hint is no longer aligned to the rt
# extent size, check that we don't report it to userspace any more.
grow_extszhint=$($XFS_IO_PROG -c 'stat' $SCRATCH_MNT | \
	grep 'fsxattr.extsize' | cut -d ' ' -f 3)
test $grow_extszhint -eq 0 || \
	echo "expected post-grow extszhint 0, got $grow_extszhint"

# Check that we now have rt extents.
rtextents=$($XFS_IO_PROG -c 'statfs' $SCRATCH_MNT | \
	grep 'geom.rtextents' | cut -d ' ' -f 3)
test $rtextents -gt 0 || echo "expected rtextents > 0"

# Check the new rt extent size.
after_rtextsz_blocks=$($XFS_IO_PROG -c 'statfs' $SCRATCH_MNT | \
	grep 'geom.rtextsize' | cut -d ' ' -f 3)
test $after_rtextsz_blocks -eq $new_rtextsz_blocks || \
	echo "expected rtextsize $new_rtextsz_blocks, got $after_rtextsz_blocks"

# Create a new realtime file to prove that we can.
echo moo > $SCRATCH_MNT/a
sync -f $SCRATCH_MNT
$XFS_IO_PROG -c 'lsattr -v' $SCRATCH_MNT/a | \
	cut -d ' ' -f 1 | \
	grep -q realtime || \
	echo "$SCRATCH_MNT/a is not a realtime file?"

# Check that the root directory's hint (which was aligned before the grow and
# misaligned after) did not propagate to the new realtime file.
file_extszhint=$($XFS_IO_PROG -c 'stat' $SCRATCH_MNT/a | \
	grep 'fsxattr.extsize' | cut -d ' ' -f 3)
test $file_extszhint -eq 0 || \
	echo "expected file extszhint 0, got $file_extszhint"

# success, all done
echo Silence is golden
status=0
exit