tests/generic/564

#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2018 Red Hat, Inc.  All Rights Reserved.
#
# FS QA Test No. 564
#
# Exercise copy_file_range() syscall error conditions.
#
# This is a regression test for kernel commit:
#   96e6e8f4a68d ("vfs: add missing checks to copy_file_range")
#
. ./common/preamble
_begin_fstest auto quick copy_range

_register_cleanup "_cleanup" BUS

# Override the default cleanup function.
_cleanup()
{
	cd /
	rm -rf $tmp.*
	[ -n "$loop_dev" ] && _destroy_loop_device $loop_dev
}

# Import common functions.
. ./common/filter


_require_test
_require_loop
# for mkfifo
_require_mknod

#
# This test effectively requires xfs_io with these commits
#  2a42470b xfs_io: copy_file_range length is a size_t
#  1a05efba io: open pipes in non-blocking mode
#
# Without those commits test will hang on old kernel when copying
# very large size and when copying from a pipe.
#
# We require a new xfs_io feature of passing an open file as the
# copy source, as an indication that the test can run without hanging
# with large size argument and to avoid opening pipe in blocking mode.
#
# Test both basic copy_range and copy_range -f availability
_require_xfs_io_command "copy_range"
_require_xfs_io_command "copy_range" "-f"

testdir="$TEST_DIR/test-$seq"
rm -rf $testdir
mkdir $testdir

$XFS_IO_PROG -f -c "pwrite -S 0x61 0 128k" $testdir/file >> $seqres.full 2>&1

echo source range overlaps destination range in same file returns EINVAL
$XFS_IO_PROG -f -c "copy_range -s 32k -d 48k -l 32k $testdir/file" $testdir/file

echo
echo destination file O_RDONLY returns EBADF
$XFS_IO_PROG -f -r -c "copy_range -l 32k $testdir/file" $testdir/copy

echo
echo destination file O_APPEND returns EBADF
$XFS_IO_PROG -f -a -c "copy_range -l 32k $testdir/file" $testdir/copy

echo
echo source/destination as directory returns EISDIR
$XFS_IO_PROG -c "copy_range -l 32k $testdir/file" $testdir
$XFS_IO_PROG -f -c "copy_range -l 32k $testdir" $testdir/copy

echo
echo source/destination as blkdev returns EINVAL
$XFS_IO_PROG -f -c "truncate 128k" $testdir/img >> $seqres.full 2>&1
loop_dev=`_create_loop_device $testdir/img`
$XFS_IO_PROG -c "copy_range -l 32k $testdir/file" $loop_dev
$XFS_IO_PROG -f -c "copy_range -l 32k $loop_dev" $testdir/copy
_destroy_loop_device $loop_dev
unset loop_dev

echo
echo source/destination as chardev returns EINVAL
$XFS_IO_PROG -c "copy_range -l 32k $testdir/file" /dev/null
$XFS_IO_PROG -f -c "copy_range -l 32k /dev/zero" $testdir/copy

echo
echo source/destination as FIFO returns EINVAL
mkfifo $testdir/fifo
$XFS_IO_PROG -c "copy_range -l 32k $testdir/file" $testdir/fifo
# Pass input pipe as non-blocking open file to avoid old xfs_io (<4.20)
# opening the pipe in blocking mode and causing the test to hang
$XFS_IO_PROG -r -n -f -c "open $testdir/copy" -C "copy_range -l 32k -f 0" $testdir/fifo

max_off=$((8 * 2**60 - 65536 - 1))
min_off=65537

echo
echo length beyond 8EiB wraps around 0 returns EOVERFLOW
$XFS_IO_PROG -f -c "copy_range -l 10e -s $max_off $testdir/file" $testdir/copy
$XFS_IO_PROG -f -c "copy_range -l 10e -d $max_off $testdir/file" $testdir/copy

echo
echo source range beyond 8TiB returns 0
$XFS_IO_PROG -c "copy_range -s $max_off -l $min_off -d 0 $testdir/file" $testdir/copy

echo
echo destination range beyond 8TiB returns EFBIG
$XFS_IO_PROG -c "copy_range -l $min_off -s 0 -d $max_off $testdir/file" $testdir/copy

echo
echo destination larger than rlimit returns EFBIG
rm -f $testdir/copy
$XFS_IO_PROG -c "truncate 128k" $testdir/file

# need a wrapper so the "File size limit exceeded" error can be filtered
do_rlimit_copy()
{
	$XFS_IO_PROG -f -c "copy_range -l 32k -s 0 -d 16m $testdir/file" $testdir/copy
}

ulimit -f $((8 * 1024))
ulimit -c 0
do_rlimit_copy 2>&1 | grep -o "File size limit exceeded"
ulimit -f unlimited

# success, all done
status=0
exit