#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2014 Jaegeuk Kim.  All Rights Reserved.
#
# FS QA Test No. generic/393
#
# Test some small truncations to check inline_data and its cached data are
# truncated correctly at the same time.
#
# The inline_data feature was introduced in ext4 and f2fs as follows.
#  ext4 : http://lwn.net/Articles/468678/
#  f2fs : http://lwn.net/Articles/573408/
#
# The basic idea is embedding small-sized file's data into relatively large
# inode space.
# In ext4, up to 132 bytes of data can be stored in 256 bytes-sized inode.
# In f2fs, up to 3.4KB of data can be embedded into 4KB-sized inode block.
#
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 /
	rm -f $tmp.*
}

# get standard environment, filters and checks
. ./common/rc
. ./common/filter

_supported_fs generic
_require_scratch

testfile=$SCRATCH_MNT/testfile
OD_CMD="od -A x -t x1z"

_scratch_mkfs > /dev/null 2>&1
_scratch_mount

# 1. make a file containing inline_data.
# 2. "truncated 0"  is to check cached page #0 was truncated entirely.
# 3. "truncated 50" is to check inline_data was truncated within its inode.
$XFS_IO_PROG -t -f \
	-c "pwrite -S 0x58 0 40" `# write    |XXXXXXXXXXXXXXXXXXXXXXXX|` \
	-c "fsync"							 \
	-c "truncate 0"          `# truncate |                        |` \
	-c "truncate 50"         `# truncate |                        |` \
$testfile | _filter_xfs_io

echo "= truncate inline_data after #0 page was truncated entirely ="
$OD_CMD $testfile
_scratch_cycle_mount
$OD_CMD $testfile
rm $testfile

# 1. make a file containing inline_data.
# 2. "truncated 0"     is to check cached page #0 was truncated entirely.
# 3. "truncated 4096"  is to check inline_data was dismissed and truncated.
$XFS_IO_PROG -t -f \
	-c "pwrite -S 0x58 0 40" `# write    |XXXXXXXXXXXXXXXXXXXXXXXX|` \
	-c "fsync"							 \
	-c "truncate 0"          `# truncate |                        |` \
	-c "truncate 4096"       `# truncate |                        |` \
$testfile | _filter_xfs_io

echo "= truncate dismissed inline_data after #0 page was truncated entirely ="
$OD_CMD $testfile
_scratch_cycle_mount
$OD_CMD $testfile
rm $testfile

# 1. make a file containing inline_data.
# 2. "truncated 4"   is to check cached page #0 was truncated partially.
# 3. "truncated 50"  is to check inline_data was truncated within its inode.
$XFS_IO_PROG -t -f \
	-c "pwrite -S 0x58 0 40" `# write    |XXXXXXXXXXXXXXXXXXXXXXXX|` \
	-c "fsync"							 \
	-c "truncate 4"          `# truncate |XXXX                    |` \
	-c "truncate 50"         `# truncate |XXXX                    |` \
$testfile | _filter_xfs_io

echo "= truncate inline_data after #0 page was truncated partially ="
$OD_CMD $testfile
_scratch_cycle_mount
$OD_CMD $testfile
rm $testfile

# 1. make a file containing inline_data.
# 2. "truncated 4"     is to check cached page #0 was truncated partially.
# 3. "truncated 4096"  is to check inline_data was dismissed and truncated.
$XFS_IO_PROG -t -f \
	-c "pwrite -S 0x58 0 40" `# write    |XXXXXXXXXXXXXXXXXXXXXXXX|` \
	-c "fsync"							 \
	-c "truncate 4"          `# truncate |XXXX                    |` \
	-c "truncate 4096"       `# truncate |XXXX                    |` \
$testfile | _filter_xfs_io

echo "= truncate dismissed inline_data after #0 page was truncated partially ="
$OD_CMD $testfile
_scratch_cycle_mount
$OD_CMD $testfile
rm $testfile

status=0
exit