#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2021 Oracle.  All Rights Reserved.
#
# FS QA Test No. 419
#
# Regression test for kernel commits:
#
# 6b69e485894b ("xfs: standardize extent size hint validation")
# 603f000b15f2 ("xfs: validate extsz hints against rt extent size when rtinherit is set")
#
# Regression test for xfsprogs commit:
#
# 1e8afffb ("mkfs: validate rt extent size hint when rtinherit is set")
#
# Collectively, these patches ensure that we cannot set the extent size hint on
# a directory when the directory is configured to propagate its realtime and
# extent size hint to newly created files when the hint size isn't aligned to
# the size of a realtime extent.  If the patches aren't applied, the write will
# fail and xfs_repair will say that the fs is corrupt.
#
. ./common/preamble
_begin_fstest auto quick realtime mkfs

# Import common functions.
. ./common/filter

# real QA test starts here
_supported_fs xfs
_require_realtime
_require_scratch

# Check mkfs.xfs option parsing with regards to rtinherit.  XFS doesn't require
# the realtime volume to be present to set rtinherit, so it's safe to call the
# mkfs binary directly, in dry run mode, with exactly the parameters we want to
# check.
mkfs_args=(-f -N -r extsize=7b -d extszinherit=15 $SCRATCH_DEV)
$MKFS_XFS_PROG -d rtinherit=1 "${mkfs_args[@]}" &>> $seqres.full && \
	echo "mkfs should not succeed with heritable rtext-unaligned extent hint"
$MKFS_XFS_PROG -d rtinherit=0 "${mkfs_args[@]}" &>> $seqres.full || \
	echo "mkfs should succeed with uninheritable rtext-unaligned extent hint"

# Move on to checking the kernel's behavior
_scratch_mkfs -r extsize=7b | _filter_mkfs >> $seqres.full 2> $tmp.mkfs
cat $tmp.mkfs >> $seqres.full
. $tmp.mkfs
_scratch_mount

test $rtextsz -ne $dbsize || \
	_notrun "cannot set rt extent size ($rtextsz) larger than fs block size ($dbsize)"

# Ensure there's no extent size hint set on the directory, then set the
# rtinherit bit on the directory to test propagation.
$XFS_IO_PROG -c 'extsize 0' -c 'chattr +t' $SCRATCH_MNT

# Now try to set an extent size hint on the directory that isn't aligned to
# the rt extent size.
$XFS_IO_PROG -c "extsize $((rtextsz + dbsize))" $SCRATCH_MNT 2>&1 | _filter_scratch
$XFS_IO_PROG -c 'stat -v' $SCRATCH_MNT > $tmp.stat
cat $tmp.stat >> $seqres.full
grep -q 'fsxattr.xflags.*rt-inherit' $tmp.stat || \
	echo "rtinherit didn't get set on the directory?"
grep 'fsxattr.extsize' $tmp.stat

# Propagate the hint from directory to file
echo moo > $SCRATCH_MNT/dummy
$XFS_IO_PROG -c 'stat -v' $SCRATCH_MNT/dummy > $tmp.stat
cat $tmp.stat >> $seqres.full
grep -q 'fsxattr.xflags.*realtime' $tmp.stat || \
	echo "realtime didnt' get set on the file?"
grep 'fsxattr.extsize' $tmp.stat

# Cycle the mount to force the inode verifier to run.
_scratch_cycle_mount

# Can we still access the dummy file?
cat $SCRATCH_MNT/dummy

# success, all done
status=0
exit