#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2009 Red Hat, Inc. All Rights Reserved.
#
# FS QA Test No. 214
#
# Basic unwritten extent sanity checks
#
seq=`basename $0`
seqres=$RESULT_DIR/$seq
echo "QA output created by $seq"

_cleanup()
{
	rm -f $TEST_DIR/ouch*
	cd /
	rm -f $tmp.*
}

here=`pwd`
tmp=$TEST_DIR/$$
status=1	# failure is the default!
trap "_cleanup; exit \$status" 0 1 2 3 15

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

# real QA test starts here
# generic, but xfs_io's fallocate must work
_supported_fs generic
# only Linux supports fallocate
_require_test

[ -n "$XFS_IO_PROG" ] || _notrun "xfs_io executable not found"

rm -f $seqres.full
rm -f $TEST_DIR/ouch*

_require_xfs_io_command "falloc"
_require_odirect

# Ok, off we go.

# We don't remove files after they are written to check
# for subsequent fs corruption at the end
rm -f $TEST_DIR/test214-*

# Super-trivial; preallocate a region and read it; get 0s.
echo "=== falloc & read  ==="
$XFS_IO_PROG -f 		\
	-c 'falloc 0 4096'	\
	-c 'pread -v 0 4096'	\
	$TEST_DIR/test214-1 | _filter_xfs_io_unique

# Preallocate a chunk, write 1 byte, read it all back.
# Should get no stale data.  Early ext4 bug.

echo "=== falloc, write beginning, read ==="
$XFS_IO_PROG -f 		\
	-c 'falloc 0 512'	\
	-c 'pwrite 0 1'		\
	-c 'pread -v 0 512'	\
	$TEST_DIR/test214-2 | _filter_xfs_io_unique

# Same but write in the middle of the region
echo "=== falloc, write middle, read ==="
$XFS_IO_PROG -f 		\
	-c 'falloc 0 512'	\
	-c 'pwrite 256 1'	\
	-c 'pread -v 0 512'	\
	$TEST_DIR/test214-3 | _filter_xfs_io_unique

# Same but write the end of the region
echo "=== falloc, write end, read ==="
$XFS_IO_PROG -f			\
	-c 'falloc 0 512'	\
	-c 'pwrite 511 1'	\
	-c 'pread -v 0 512'	\
	$TEST_DIR/test214-4 | _filter_xfs_io_unique

# Reported by IBM on ext4.
#
# Fixed by commit a41f20716975910d9beb90b7efc61107901492b8
#
# The file was previously preallocated, and then initialized the middle of
# the preallocation area using Direct IO write, then overwrite part of
# initialized area. Later after truncate the file (to the middle of the
# initialized data), the initialized data *before* the new file size was
# gone after remount the filesystem.

echo "=== falloc, write, sync, truncate, read ==="
# Allocate, write, sync, truncate (buffered)
$XFS_IO_PROG -f					\
	-c 'falloc         0x0     0x65C00'	\
	-c 'pwrite -S 0xAA 0x12000 0x10000'	\
	-c 'fsync'				\
	-c 'truncate 0x16000'			\
	$TEST_DIR/test214-5 | _filter_xfs_io_unique

# now do a direct read and see what's on-disk
$XFS_IO_PROG -f -d				\
	-c 'pread -v 0 0x16000'			\
	$TEST_DIR/test214-5 | _filter_xfs_io_unique

# Reported by Ted Ts'o on linux-ext4, 12/31/2009
# double-allocation on ext4 when fallocating over delalloc blocks
# Regression due to d21cd8f163ac44b15c465aab7306db931c606908

echo "=== delalloc write 16k; fallocate same range ==="
# delalloc write 16k, fallocate same range.
# Should get caught on fsck when we're done.

$XFS_IO_PROG -f					\
	-c "pwrite 0 16k"			\
	-c "falloc 0 16k"			\
	-c "fsync"				\
	$TEST_DIR/test214-6 | _filter_xfs_io_unique

# Another ext4 failure

echo "=== ext4 testcase 2 ==="

$XFS_IO_PROG -f \
        -c "fsync"                      \
        -c "pwrite 551917 41182"        \
        -c "falloc 917633 392230"       \
        -c "pwrite 285771 77718"        \
        -c "pwrite 1136718 104115"      \
        $TEST_DIR/test214-7 | _filter_xfs_io_unique

# success, all done
status=0
exit