[mirror_qemu.git] / tests / qemu-iotests / 142

#!/usr/bin/env bash
#
# Test for configuring cache modes of arbitrary nodes (requires O_DIRECT)
#
# Copyright (C) 2015 Red Hat, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

# creator
owner=kwolf@redhat.com

seq=`basename $0`
echo "QA output created by $seq"

status=1	# failure is the default!

_cleanup()
{
    _cleanup_test_img
    _rm_test_img "$TEST_IMG.snap"
}
trap "_cleanup; exit \$status" 0 1 2 3 15

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

_supported_fmt qcow2
_supported_proto file

# We test all cache modes anyway, but O_DIRECT needs to be supported
_default_cache_mode none
_supported_cache_modes none directsync

do_run_qemu()
{
    echo Testing: "$@"
    (
        if ! test -t 0; then
            while read cmd; do
                echo $cmd
            done
        fi
        echo quit
    ) | $QEMU -nographic -monitor stdio -nodefaults "$@"
    echo
}

run_qemu()
{
    do_run_qemu "$@" 2>&1 | _filter_testdir | _filter_qemu | _filter_hmp
}

size=128M

TEST_IMG="$TEST_IMG.base" _make_test_img $size
TEST_IMG="$TEST_IMG.snap" _make_test_img $size
_make_test_img -b "$TEST_IMG.base" $size -F $IMGFMT

echo
echo === Simple test for all cache modes ===
echo

run_qemu -drive file="$TEST_IMG",cache=none
run_qemu -drive file="$TEST_IMG",cache=directsync
run_qemu -drive file="$TEST_IMG",cache=writeback
run_qemu -drive file="$TEST_IMG",cache=writethrough
run_qemu -drive file="$TEST_IMG",cache=unsafe
run_qemu -drive file="$TEST_IMG",cache=invalid_value

echo
echo === Check inheritance of cache modes ===
echo

files="if=none,file=$TEST_IMG,backing.file.filename=$TEST_IMG.base"
ids="node-name=image,backing.node-name=backing,backing.file.node-name=backing-file,file.node-name=file"

check_cache_all()
{
    # cache.direct is supposed to be inherited by both bs->file and
    # bs->backing

    printf "cache.direct=on on none0\n"
    echo "$hmp_cmds" | run_qemu -drive "$files","$ids",cache.direct=on | grep -e "Cache" -e "[Cc]annot|[Cc]ould not|[Cc]an't"
    printf "\ncache.direct=on on file\n"
    echo "$hmp_cmds" | run_qemu -drive "$files","$ids",file.cache.direct=on | grep -e "Cache" -e "[Cc]annot|[Cc]ould not|[Cc]an't"
    printf "\ncache.direct=on on backing\n"
    echo "$hmp_cmds" | run_qemu -drive "$files","$ids",backing.cache.direct=on | grep -e "Cache" -e "[Cc]annot|[Cc]ould not|[Cc]an't"
    printf "\ncache.direct=on on backing-file\n"
    echo "$hmp_cmds" | run_qemu -drive "$files","$ids",backing.file.cache.direct=on | grep -e "Cache" -e "[Cc]annot|[Cc]ould not|[Cc]an't"

    # cache.writeback is supposed to be inherited by bs->backing; bs->file
    # always gets cache.writeback=on

    printf "\n\ncache.writeback=off on none0\n"
    echo "$hmp_cmds" | run_qemu -drive "$files","$ids",cache.writeback=off | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
    printf "\ncache.writeback=off on file\n"
    echo "$hmp_cmds" | run_qemu -drive "$files","$ids",file.cache.writeback=off | grep -e "doesn't" -e "does not"
    printf "\ncache.writeback=off on backing\n"
    echo "$hmp_cmds" | run_qemu -drive "$files","$ids",backing.cache.writeback=off | grep -e "doesn't" -e "does not"
    printf "\ncache.writeback=off on backing-file\n"
    echo "$hmp_cmds" | run_qemu -drive "$files","$ids",backing.file.cache.writeback=off | grep -e "doesn't" -e "does not"

    # cache.no-flush is supposed to be inherited by both bs->file and bs->backing

    printf "\n\ncache.no-flush=on on none0\n"
    echo "$hmp_cmds" | run_qemu -drive "$files","$ids",cache.no-flush=on | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
    printf "\ncache.no-flush=on on file\n"
    echo "$hmp_cmds" | run_qemu -drive "$files","$ids",file.cache.no-flush=on | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
    printf "\ncache.no-flush=on on backing\n"
    echo "$hmp_cmds" | run_qemu -drive "$files","$ids",backing.cache.no-flush=on | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
    printf "\ncache.no-flush=on on backing-file\n"
    echo "$hmp_cmds" | run_qemu -drive "$files","$ids",backing.file.cache.no-flush=on | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
}

echo
echo "--- Configure cache modes on the command line ---"
echo

# First check the inherited cache mode after opening the image.

hmp_cmds="info block none0
info block image
info block file
info block backing
info block backing-file"

check_cache_all

echo
echo "--- Cache modes after reopen (live snapshot) ---"
echo

# Then trigger a reopen and check that the cache modes are still the same.

hmp_cmds="snapshot_blkdev -n none0 $TEST_IMG.snap $IMGFMT
info block
info block image
info block file
info block backing
info block backing-file"

check_cache_all

echo
echo "--- Change cache modes with reopen (qemu-io command, flags) ---"
echo

# This one actually changes the cache mode with the reopen. For this test, the
# new cache mode is specified in the flags, not as an option.

hmp_cmds='qemu-io none0 "reopen -c none"
info block none0
info block image
info block file
info block backing
info block backing-file'

check_cache_all

echo
echo "--- Change cache modes with reopen (qemu-io command, options) ---"
echo

# This one actually changes the cache mode with the reopen. For this test, the
# new cache mode is specified as an option, not in the flags.

hmp_cmds='qemu-io none0 "reopen -o cache.direct=on"
info block none0
info block image
info block file
info block backing
info block backing-file'

check_cache_all

echo
echo "--- Change cache modes after snapshot ---"
echo

# This checks that the original image doesn't inherit from the snapshot

hmp_cmds="snapshot_blkdev -n none0 $TEST_IMG.snap $IMGFMT
qemu-io none0 \"reopen -c none\"
info block none0
info block image
info block file
info block backing
info block backing-file"

check_cache_all

echo
echo "--- Change cache mode in parent, child has explicit option in JSON ---"
echo

# This checks that children with options explicitly set by the json:
# pseudo-protocol don't inherit these options from their parents.
#
# Yes, blkdebug::json:... is criminal, but I can't see another way to have a
# BDS initialised with the json: pseudo-protocol, but still have it inherit
# options from its parent node.

hmp_cmds="qemu-io none0 \"reopen -o cache.direct=on,cache.no-flush=on\"
info block none0
info block image
info block blkdebug
info block file"

echo "$hmp_cmds" | run_qemu -drive if=none,file="blkdebug::json:{\"filename\":\"$TEST_IMG\",,\"cache\":{\"direct\":false}}",node-name=image,file.node-name=blkdebug,file.image.node-name=file | grep "Cache"

echo
echo "=== Check that referenced BDSes don't inherit ==="
echo

drv_bkfile="if=none,driver=file,filename=$TEST_IMG.base,node-name=backing-file"
drv_bk="if=none,file=json:{'driver':'$IMGFMT',,'file':'backing-file',,'node-name':'backing'}"
drv_file="if=none,driver=file,filename=$TEST_IMG,node-name=file"
drv_img="if=none,id=blk,file=json:{'driver':'$IMGFMT',,'file':'file',,'backing':'backing',,'node-name':'image'}"

check_cache_all_separate()
{
    # Check cache.direct

    printf "cache.direct=on on blk\n"
    echo "$hmp_cmds" | run_qemu -drive "$drv_bkfile" -drive "$drv_bk" -drive "$drv_file" -drive "$drv_img",cache.direct=on | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
    printf "\ncache.direct=on on file\n"
    echo "$hmp_cmds" | run_qemu -drive "$drv_bkfile" -drive "$drv_bk" -drive "$drv_file",cache.direct=on -drive "$drv_img" | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
    printf "\ncache.direct=on on backing\n"
    echo "$hmp_cmds" | run_qemu -drive "$drv_bkfile" -drive "$drv_bk",cache.direct=on -drive "$drv_file" -drive "$drv_img" | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
    printf "\ncache.direct=on on backing-file\n"
    echo "$hmp_cmds" | run_qemu -drive "$drv_bkfile",cache.direct=on -drive "$drv_bk" -drive "$drv_file" -drive "$drv_img" | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"

    # Check cache.writeback

    printf "\n\ncache.writeback=off on blk\n"
    echo "$hmp_cmds" | run_qemu -drive "$drv_bkfile" -drive "$drv_bk" -drive "$drv_file" -drive "$drv_img",cache.writeback=off | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
    printf "\ncache.writeback=off on file\n"
    echo "$hmp_cmds" | run_qemu -drive "$drv_bkfile" -drive "$drv_bk" -drive "$drv_file",cache.writeback=off -drive "$drv_img" | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
    printf "\ncache.writeback=off on backing\n"
    echo "$hmp_cmds" | run_qemu -drive "$drv_bkfile" -drive "$drv_bk",cache.writeback=off -drive "$drv_file" -drive "$drv_img" | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
    printf "\ncache.writeback=off on backing-file\n"
    echo "$hmp_cmds" | run_qemu -drive "$drv_bkfile",cache.writeback=off -drive "$drv_bk" -drive "$drv_file" -drive "$drv_img" | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"

    # Check cache.no-flush

    printf "\n\ncache.no-flush=on on blk\n"
    echo "$hmp_cmds" | run_qemu -drive "$drv_bkfile" -drive "$drv_bk" -drive "$drv_file" -drive "$drv_img",cache.no-flush=on | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
    printf "\ncache.no-flush=on on file\n"
    echo "$hmp_cmds" | run_qemu -drive "$drv_bkfile" -drive "$drv_bk" -drive "$drv_file",cache.no-flush=on -drive "$drv_img" | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
    printf "\ncache.no-flush=on on backing\n"
    echo "$hmp_cmds" | run_qemu -drive "$drv_bkfile" -drive "$drv_bk",cache.no-flush=on -drive "$drv_file" -drive "$drv_img" | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
    printf "\ncache.no-flush=on on backing-file\n"
    echo "$hmp_cmds" | run_qemu -drive "$drv_bkfile",cache.no-flush=on -drive "$drv_bk" -drive "$drv_file" -drive "$drv_img" | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
}

echo
echo "--- Configure cache modes on the command line ---"
echo

# First check the inherited cache mode after opening the image.

hmp_cmds="info block image
info block file
info block backing
info block backing-file"

check_cache_all_separate

echo
echo "--- Cache modes after reopen (live snapshot) ---"
echo

# Then trigger a reopen and check that the cache modes are still the same.

hmp_cmds="snapshot_blkdev -n blk $TEST_IMG.snap $IMGFMT
info block blk
info block image
info block file
info block backing
info block backing-file"

check_cache_all_separate

echo
echo "--- Change cache modes with reopen (qemu-io command, flags) ---"
echo

# This one actually changes the cache mode with the reopen. For this test, the
# new cache mode is specified as flags, not as option.

hmp_cmds='qemu-io blk "reopen -c none"
info block image
info block file
info block backing
info block backing-file'

check_cache_all_separate


echo
echo "=== Reopening children instead of the root ==="
echo

files="if=none,file=$TEST_IMG,backing.file.filename=$TEST_IMG.base"
ids="node-name=image,backing.node-name=backing,backing.file.node-name=backing-file,file.node-name=file"

echo
echo "--- Basic reopen ---"
echo

hmp_cmds='qemu-io none0 "reopen -o backing.cache.direct=on"
info block none0
info block image
info block file
info block backing
info block backing-file'

check_cache_all

echo
echo "--- Change cache mode after reopening child ---"
echo

# This checks that children with options explicitly set with reopen don't
# inherit these options from their parents any more

# TODO Implement node-name support for 'qemu-io' HMP command for -c
# Can use only -o to access child node options for now

hmp_cmds="qemu-io none0 \"reopen -o file.cache.direct=off,file.cache.no-flush=off\"
qemu-io none0 \"reopen -o backing.file.cache.direct=off,backing.file.cache.no-flush=on\"
qemu-io none0 \"reopen -c none\"
info block image
info block file
info block backing
info block backing-file"

echo "$hmp_cmds" | run_qemu -drive "$files","$ids" | grep "Cache"

echo
echo "--- Alignment after changing O_DIRECT ---"
echo

# Directly test the protocol level: Can unaligned requests succeed even if
# O_DIRECT was only enabled through a reopen and vice versa?

# Ensure image size is a multiple of the sector size (required for O_DIRECT)
$QEMU_IMG create -f file "$TEST_IMG" 1M | _filter_img_create

# And write some data (not strictly necessary, but it feels better to actually
# have something to be read)
$QEMU_IO -f file -c 'write 0 4096' "$TEST_IMG" | _filter_qemu_io

$QEMU_IO --cache=writeback -f file $TEST_IMG <<EOF | _filter_qemu_io
read 42 42
reopen -o cache.direct=on
read 42 42
reopen -o cache.direct=off
read 42 42
EOF
$QEMU_IO --cache=none -f file $TEST_IMG <<EOF | _filter_qemu_io
read 42 42
reopen -o cache.direct=off
read 42 42
reopen -o cache.direct=on
read 42 42
EOF

# success, all done
echo "*** done"
rm -f $seq.full
status=0
Commit	Line	Data
11a82d14	1	#!/usr/bin/env bash
8f7acbe6 KW	2	#
	3	# Test for configuring cache modes of arbitrary nodes (requires O_DIRECT)
	4	#
	5	# Copyright (C) 2015 Red Hat, Inc.
	6	#
	7	# This program is free software; you can redistribute it and/or modify
	8	# it under the terms of the GNU General Public License as published by
	9	# the Free Software Foundation; either version 2 of the License, or
	10	# (at your option) any later version.
	11	#
	12	# This program is distributed in the hope that it will be useful,
	13	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	# GNU General Public License for more details.
	16	#
	17	# You should have received a copy of the GNU General Public License
	18	# along with this program. If not, see <http://www.gnu.org/licenses/>.
	19	#
	20
	21	# creator
	22	owner=kwolf@redhat.com
	23
	24	seq=`basename $0`
	25	echo "QA output created by $seq"
	26
8f7acbe6 KW	27	status=1 # failure is the default!
	28
	29	_cleanup()
	30	{
	31	_cleanup_test_img
f91ecbd7	32	_rm_test_img "$TEST_IMG.snap"
8f7acbe6 KW	33	}
	34	trap "_cleanup; exit \$status" 0 1 2 3 15
	35
	36	# get standard environment, filters and checks
	37	. ./common.rc
	38	. ./common.filter
	39
	40	_supported_fmt qcow2
	41	_supported_proto file
8f7acbe6 KW	42
	43	# We test all cache modes anyway, but O_DIRECT needs to be supported
	44	_default_cache_mode none
	45	_supported_cache_modes none directsync
	46
8cedcffd	47	do_run_qemu()
8f7acbe6 KW	48	{
	49	echo Testing: "$@"
	50	(
	51	if ! test -t 0; then
	52	while read cmd; do
	53	echo $cmd
	54	done
	55	fi
	56	echo quit
	57	) \| $QEMU -nographic -monitor stdio -nodefaults "$@"
	58	echo
	59	}
	60
8cedcffd	61	run_qemu()
8f7acbe6	62	{
69404d9e	63	do_run_qemu "$@" 2>&1 \| _filter_testdir \| _filter_qemu \| _filter_hmp
8f7acbe6 KW	64	}
	65
	66	size=128M
	67
	68	TEST_IMG="$TEST_IMG.base" _make_test_img $size
	69	TEST_IMG="$TEST_IMG.snap" _make_test_img $size
b66ff2c2	70	_make_test_img -b "$TEST_IMG.base" $size -F $IMGFMT
8f7acbe6 KW	71
	72	echo
	73	echo === Simple test for all cache modes ===
	74	echo
	75
	76	run_qemu -drive file="$TEST_IMG",cache=none
	77	run_qemu -drive file="$TEST_IMG",cache=directsync
	78	run_qemu -drive file="$TEST_IMG",cache=writeback
	79	run_qemu -drive file="$TEST_IMG",cache=writethrough
	80	run_qemu -drive file="$TEST_IMG",cache=unsafe
	81	run_qemu -drive file="$TEST_IMG",cache=invalid_value
	82
	83	echo
	84	echo === Check inheritance of cache modes ===
	85	echo
	86
	87	files="if=none,file=$TEST_IMG,backing.file.filename=$TEST_IMG.base"
	88	ids="node-name=image,backing.node-name=backing,backing.file.node-name=backing-file,file.node-name=file"
	89
8cedcffd	90	check_cache_all()
8f7acbe6 KW	91	{
	92	# cache.direct is supposed to be inherited by both bs->file and
	93	# bs->backing
	94
b43671f8	95	printf "cache.direct=on on none0\n"
73ac451f	96	echo "$hmp_cmds" \| run_qemu -drive "$files","$ids",cache.direct=on \| grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
b43671f8	97	printf "\ncache.direct=on on file\n"
73ac451f	98	echo "$hmp_cmds" \| run_qemu -drive "$files","$ids",file.cache.direct=on \| grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
b43671f8	99	printf "\ncache.direct=on on backing\n"
73ac451f	100	echo "$hmp_cmds" \| run_qemu -drive "$files","$ids",backing.cache.direct=on \| grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
b43671f8	101	printf "\ncache.direct=on on backing-file\n"
73ac451f	102	echo "$hmp_cmds" \| run_qemu -drive "$files","$ids",backing.file.cache.direct=on \| grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
8f7acbe6 KW	103
	104	# cache.writeback is supposed to be inherited by bs->backing; bs->file
	105	# always gets cache.writeback=on
	106
b43671f8	107	printf "\n\ncache.writeback=off on none0\n"
73ac451f	108	echo "$hmp_cmds" \| run_qemu -drive "$files","$ids",cache.writeback=off \| grep -e "Cache" -e "[Cc]annot\\|[Cc]ould not\\|[Cc]an't"
b43671f8	109	printf "\ncache.writeback=off on file\n"
61de4c68	110	echo "$hmp_cmds" \| run_qemu -drive "$files","$ids",file.cache.writeback=off \| grep -e "doesn't" -e "does not"
b43671f8	111	printf "\ncache.writeback=off on backing\n"
61de4c68	112	echo "$hmp_cmds" \| run_qemu -drive "$files","$ids",backing.cache.writeback=off \| grep -e "doesn't" -e "does not"
b43671f8	113	printf "\ncache.writeback=off on backing-file\n"
61de4c68	114	echo "$hmp_cmds" \| run_qemu -drive "$files","$ids",backing.file.cache.writeback=off \| grep -e "doesn't" -e "does not"
8f7acbe6 KW	115
	116	# cache.no-flush is supposed to be inherited by both bs->file and bs->backing
	117
b43671f8	118	printf "\n\ncache.no-flush=on on none0\n"
73ac451f	119	echo "$hmp_cmds" \| run_qemu -drive "$files","$ids",cache.no-flush=on \| grep -e "Cache" -e "[Cc]annot\\|[Cc]ould not\\|[Cc]an't"
b43671f8	120	printf "\ncache.no-flush=on on file\n"
73ac451f	121	echo "$hmp_cmds" \| run_qemu -drive "$files","$ids",file.cache.no-flush=on \| grep -e "Cache" -e "[Cc]annot\\|[Cc]ould not\\|[Cc]an't"
b43671f8	122	printf "\ncache.no-flush=on on backing\n"
73ac451f	123	echo "$hmp_cmds" \| run_qemu -drive "$files","$ids",backing.cache.no-flush=on \| grep -e "Cache" -e "[Cc]annot\\|[Cc]ould not\\|[Cc]an't"
b43671f8	124	printf "\ncache.no-flush=on on backing-file\n"
73ac451f	125	echo "$hmp_cmds" \| run_qemu -drive "$files","$ids",backing.file.cache.no-flush=on \| grep -e "Cache" -e "[Cc]annot\\|[Cc]ould not\\|[Cc]an't"
8f7acbe6 KW	126	}
	127
	128	echo
	129	echo "--- Configure cache modes on the command line ---"
	130	echo
	131
	132	# First check the inherited cache mode after opening the image.
	133
c83f9fba KW	134	hmp_cmds="info block none0
c83f9fba KW	135	info block image
8f7acbe6 KW	136	info block file
	137	info block backing
	138	info block backing-file"
	139
	140	check_cache_all
	141
	142	echo
	143	echo "--- Cache modes after reopen (live snapshot) ---"
	144	echo
	145
	146	# Then trigger a reopen and check that the cache modes are still the same.
	147
	148	hmp_cmds="snapshot_blkdev -n none0 $TEST_IMG.snap $IMGFMT
	149	info block
	150	info block image
	151	info block file
	152	info block backing
	153	info block backing-file"
	154
	155	check_cache_all
	156
	157	echo
	158	echo "--- Change cache modes with reopen (qemu-io command, flags) ---"
	159	echo
	160
	161	# This one actually changes the cache mode with the reopen. For this test, the
	162	# new cache mode is specified in the flags, not as an option.
	163
	164	hmp_cmds='qemu-io none0 "reopen -c none"
c83f9fba	165	info block none0
8f7acbe6 KW	166	info block image
	167	info block file
	168	info block backing
	169	info block backing-file'
	170
	171	check_cache_all
	172
	173	echo
	174	echo "--- Change cache modes with reopen (qemu-io command, options) ---"
	175	echo
	176
	177	# This one actually changes the cache mode with the reopen. For this test, the
	178	# new cache mode is specified as an option, not in the flags.
	179
	180	hmp_cmds='qemu-io none0 "reopen -o cache.direct=on"
c83f9fba	181	info block none0
8f7acbe6 KW	182	info block image
	183	info block file
	184	info block backing
	185	info block backing-file'
	186
	187	check_cache_all
	188
	189	echo
	190	echo "--- Change cache modes after snapshot ---"
	191	echo
	192
	193	# This checks that the original image doesn't inherit from the snapshot
	194
	195	hmp_cmds="snapshot_blkdev -n none0 $TEST_IMG.snap $IMGFMT
	196	qemu-io none0 \"reopen -c none\"
	197	info block none0
	198	info block image
	199	info block file
	200	info block backing
	201	info block backing-file"
	202
	203	check_cache_all
	204
	205	echo
	206	echo "--- Change cache mode in parent, child has explicit option in JSON ---"
	207	echo
	208
	209	# This checks that children with options explicitly set by the json:
	210	# pseudo-protocol don't inherit these options from their parents.
	211	#
	212	# Yes, blkdebug::json:... is criminal, but I can't see another way to have a
	213	# BDS initialised with the json: pseudo-protocol, but still have it inherit
	214	# options from its parent node.
	215
19dbecdc	216	hmp_cmds="qemu-io none0 \"reopen -o cache.direct=on,cache.no-flush=on\"
c83f9fba	217	info block none0
8f7acbe6 KW	218	info block image
	219	info block blkdebug
	220	info block file"
	221
73ac451f	222	echo "$hmp_cmds" \| run_qemu -drive if=none,file="blkdebug::json:{\"filename\":\"$TEST_IMG\",,\"cache\":{\"direct\":false}}",node-name=image,file.node-name=blkdebug,file.image.node-name=file \| grep "Cache"
8f7acbe6 KW	223
	224	echo
	225	echo "=== Check that referenced BDSes don't inherit ==="
	226	echo
	227
	228	drv_bkfile="if=none,driver=file,filename=$TEST_IMG.base,node-name=backing-file"
	229	drv_bk="if=none,file=json:{'driver':'$IMGFMT',,'file':'backing-file',,'node-name':'backing'}"
	230	drv_file="if=none,driver=file,filename=$TEST_IMG,node-name=file"
	231	drv_img="if=none,id=blk,file=json:{'driver':'$IMGFMT',,'file':'file',,'backing':'backing',,'node-name':'image'}"
	232
8cedcffd	233	check_cache_all_separate()
8f7acbe6 KW	234	{
	235	# Check cache.direct
	236
b43671f8	237	printf "cache.direct=on on blk\n"
73ac451f	238	echo "$hmp_cmds" \| run_qemu -drive "$drv_bkfile" -drive "$drv_bk" -drive "$drv_file" -drive "$drv_img",cache.direct=on \| grep -e "Cache" -e "[Cc]annot\\|[Cc]ould not\\|[Cc]an't"
b43671f8	239	printf "\ncache.direct=on on file\n"
73ac451f	240	echo "$hmp_cmds" \| run_qemu -drive "$drv_bkfile" -drive "$drv_bk" -drive "$drv_file",cache.direct=on -drive "$drv_img" \| grep -e "Cache" -e "[Cc]annot\\|[Cc]ould not\\|[Cc]an't"
b43671f8	241	printf "\ncache.direct=on on backing\n"
73ac451f	242	echo "$hmp_cmds" \| run_qemu -drive "$drv_bkfile" -drive "$drv_bk",cache.direct=on -drive "$drv_file" -drive "$drv_img" \| grep -e "Cache" -e "[Cc]annot\\|[Cc]ould not\\|[Cc]an't"
b43671f8	243	printf "\ncache.direct=on on backing-file\n"
73ac451f	244	echo "$hmp_cmds" \| run_qemu -drive "$drv_bkfile",cache.direct=on -drive "$drv_bk" -drive "$drv_file" -drive "$drv_img" \| grep -e "Cache" -e "[Cc]annot\\|[Cc]ould not\\|[Cc]an't"
8f7acbe6 KW	245
	246	# Check cache.writeback
	247
b43671f8	248	printf "\n\ncache.writeback=off on blk\n"
73ac451f	249	echo "$hmp_cmds" \| run_qemu -drive "$drv_bkfile" -drive "$drv_bk" -drive "$drv_file" -drive "$drv_img",cache.writeback=off \| grep -e "Cache" -e "[Cc]annot\\|[Cc]ould not\\|[Cc]an't"
b43671f8	250	printf "\ncache.writeback=off on file\n"
73ac451f	251	echo "$hmp_cmds" \| run_qemu -drive "$drv_bkfile" -drive "$drv_bk" -drive "$drv_file",cache.writeback=off -drive "$drv_img" \| grep -e "Cache" -e "[Cc]annot\\|[Cc]ould not\\|[Cc]an't"
b43671f8	252	printf "\ncache.writeback=off on backing\n"
73ac451f	253	echo "$hmp_cmds" \| run_qemu -drive "$drv_bkfile" -drive "$drv_bk",cache.writeback=off -drive "$drv_file" -drive "$drv_img" \| grep -e "Cache" -e "[Cc]annot\\|[Cc]ould not\\|[Cc]an't"
b43671f8	254	printf "\ncache.writeback=off on backing-file\n"
73ac451f	255	echo "$hmp_cmds" \| run_qemu -drive "$drv_bkfile",cache.writeback=off -drive "$drv_bk" -drive "$drv_file" -drive "$drv_img" \| grep -e "Cache" -e "[Cc]annot\\|[Cc]ould not\\|[Cc]an't"
8f7acbe6 KW	256
	257	# Check cache.no-flush
	258
b43671f8	259	printf "\n\ncache.no-flush=on on blk\n"
73ac451f	260	echo "$hmp_cmds" \| run_qemu -drive "$drv_bkfile" -drive "$drv_bk" -drive "$drv_file" -drive "$drv_img",cache.no-flush=on \| grep -e "Cache" -e "[Cc]annot\\|[Cc]ould not\\|[Cc]an't"
b43671f8	261	printf "\ncache.no-flush=on on file\n"
73ac451f	262	echo "$hmp_cmds" \| run_qemu -drive "$drv_bkfile" -drive "$drv_bk" -drive "$drv_file",cache.no-flush=on -drive "$drv_img" \| grep -e "Cache" -e "[Cc]annot\\|[Cc]ould not\\|[Cc]an't"
b43671f8	263	printf "\ncache.no-flush=on on backing\n"
73ac451f	264	echo "$hmp_cmds" \| run_qemu -drive "$drv_bkfile" -drive "$drv_bk",cache.no-flush=on -drive "$drv_file" -drive "$drv_img" \| grep -e "Cache" -e "[Cc]annot\\|[Cc]ould not\\|[Cc]an't"
b43671f8	265	printf "\ncache.no-flush=on on backing-file\n"
73ac451f	266	echo "$hmp_cmds" \| run_qemu -drive "$drv_bkfile",cache.no-flush=on -drive "$drv_bk" -drive "$drv_file" -drive "$drv_img" \| grep -e "Cache" -e "[Cc]annot\\|[Cc]ould not\\|[Cc]an't"
8f7acbe6 KW	267	}
	268
	269	echo
	270	echo "--- Configure cache modes on the command line ---"
	271	echo
	272
	273	# First check the inherited cache mode after opening the image.
	274
	275	hmp_cmds="info block image
	276	info block file
	277	info block backing
	278	info block backing-file"
	279
	280	check_cache_all_separate
	281
	282	echo
	283	echo "--- Cache modes after reopen (live snapshot) ---"
	284	echo
	285
	286	# Then trigger a reopen and check that the cache modes are still the same.
	287
	288	hmp_cmds="snapshot_blkdev -n blk $TEST_IMG.snap $IMGFMT
	289	info block blk
	290	info block image
	291	info block file
	292	info block backing
	293	info block backing-file"
	294
	295	check_cache_all_separate
	296
	297	echo
	298	echo "--- Change cache modes with reopen (qemu-io command, flags) ---"
	299	echo
	300
	301	# This one actually changes the cache mode with the reopen. For this test, the
	302	# new cache mode is specified as flags, not as option.
	303
	304	hmp_cmds='qemu-io blk "reopen -c none"
	305	info block image
	306	info block file
	307	info block backing
	308	info block backing-file'
	309
	310	check_cache_all_separate
	311
	312
	313	echo
	314	echo "=== Reopening children instead of the root ==="
	315	echo
	316
	317	files="if=none,file=$TEST_IMG,backing.file.filename=$TEST_IMG.base"
	318	ids="node-name=image,backing.node-name=backing,backing.file.node-name=backing-file,file.node-name=file"
	319
	320	echo
	321	echo "--- Basic reopen ---"
	322	echo
	323
	324	hmp_cmds='qemu-io none0 "reopen -o backing.cache.direct=on"
c83f9fba	325	info block none0
8f7acbe6 KW	326	info block image
	327	info block file
	328	info block backing
	329	info block backing-file'
	330
	331	check_cache_all
	332
	333	echo
	334	echo "--- Change cache mode after reopening child ---"
	335	echo
	336
	337	# This checks that children with options explicitly set with reopen don't
	338	# inherit these options from their parents any more
	339
	340	# TODO Implement node-name support for 'qemu-io' HMP command for -c
	341	# Can use only -o to access child node options for now
	342
bfd18d1e KW	343	hmp_cmds="qemu-io none0 \"reopen -o file.cache.direct=off,file.cache.no-flush=off\"
bfd18d1e KW	344	qemu-io none0 \"reopen -o backing.file.cache.direct=off,backing.file.cache.no-flush=on\"
8f7acbe6 KW	345	qemu-io none0 \"reopen -c none\"
	346	info block image
	347	info block file
	348	info block backing
	349	info block backing-file"
	350
	351	echo "$hmp_cmds" \| run_qemu -drive "$files","$ids" \| grep "Cache"
	352
5dbd0ce1 KW	353	echo
	354	echo "--- Alignment after changing O_DIRECT ---"
	355	echo
	356
	357	# Directly test the protocol level: Can unaligned requests succeed even if
	358	# O_DIRECT was only enabled through a reopen and vice versa?
	359
	360	# Ensure image size is a multiple of the sector size (required for O_DIRECT)
	361	$QEMU_IMG create -f file "$TEST_IMG" 1M \| _filter_img_create
	362
	363	# And write some data (not strictly necessary, but it feels better to actually
	364	# have something to be read)
	365	$QEMU_IO -f file -c 'write 0 4096' "$TEST_IMG" \| _filter_qemu_io
	366
	367	$QEMU_IO --cache=writeback -f file $TEST_IMG <<EOF \| _filter_qemu_io
	368	read 42 42
	369	reopen -o cache.direct=on
	370	read 42 42
	371	reopen -o cache.direct=off
	372	read 42 42
	373	EOF
	374	$QEMU_IO --cache=none -f file $TEST_IMG <<EOF \| _filter_qemu_io
	375	read 42 42
	376	reopen -o cache.direct=off
	377	read 42 42
	378	reopen -o cache.direct=on
	379	read 42 42
	380	EOF
	381
8f7acbe6 KW	382	# success, all done
	383	echo "*** done"
	384	rm -f $seq.full
	385	status=0