mirror of
https://gitlab.com/qemu-project/qemu
synced 2024-11-02 21:32:52 +00:00
5dbd0ce115
At the end of a reopen, we already call bdrv_refresh_limits(), which
should update bs->request_alignment according to the new file
descriptor. However, raw_probe_alignment() relies on s->needs_alignment
and just uses 1 if it isn't set. We neglected to update this field, so
starting with cache=writeback and then reopening with cache=none means
that we get an incorrect bs->request_alignment == 1 and unaligned
requests fail instead of being automatically aligned.
Fix this by recalculating s->needs_alignment in raw_refresh_limits()
before calling raw_probe_alignment().
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20211104113109.56336-1-kwolf@redhat.com>
Reviewed-by: Hanna Reitz <hreitz@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20211115145409.176785-13-kwolf@redhat.com>
[hreitz: Fix iotest 142 for block sizes greater than 512 by operating on
a file with a size of 1 MB]
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20211116101431.105252-1-hreitz@redhat.com>
385 lines
13 KiB
Bash
Executable file
385 lines
13 KiB
Bash
Executable file
#!/usr/bin/env bash
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#
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# Test for configuring cache modes of arbitrary nodes (requires O_DIRECT)
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#
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# Copyright (C) 2015 Red Hat, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# creator
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owner=kwolf@redhat.com
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seq=`basename $0`
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echo "QA output created by $seq"
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status=1 # failure is the default!
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_cleanup()
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{
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_cleanup_test_img
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_rm_test_img "$TEST_IMG.snap"
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}
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trap "_cleanup; exit \$status" 0 1 2 3 15
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# get standard environment, filters and checks
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. ./common.rc
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. ./common.filter
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_supported_fmt qcow2
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_supported_proto file
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# We test all cache modes anyway, but O_DIRECT needs to be supported
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_default_cache_mode none
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_supported_cache_modes none directsync
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do_run_qemu()
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{
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echo Testing: "$@"
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(
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if ! test -t 0; then
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while read cmd; do
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echo $cmd
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done
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fi
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echo quit
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) | $QEMU -nographic -monitor stdio -nodefaults "$@"
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echo
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}
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run_qemu()
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{
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do_run_qemu "$@" 2>&1 | _filter_testdir | _filter_qemu | _filter_hmp
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}
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size=128M
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TEST_IMG="$TEST_IMG.base" _make_test_img $size
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TEST_IMG="$TEST_IMG.snap" _make_test_img $size
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_make_test_img -b "$TEST_IMG.base" $size -F $IMGFMT
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echo
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echo === Simple test for all cache modes ===
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echo
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run_qemu -drive file="$TEST_IMG",cache=none
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run_qemu -drive file="$TEST_IMG",cache=directsync
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run_qemu -drive file="$TEST_IMG",cache=writeback
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run_qemu -drive file="$TEST_IMG",cache=writethrough
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run_qemu -drive file="$TEST_IMG",cache=unsafe
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run_qemu -drive file="$TEST_IMG",cache=invalid_value
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echo
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echo === Check inheritance of cache modes ===
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echo
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files="if=none,file=$TEST_IMG,backing.file.filename=$TEST_IMG.base"
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ids="node-name=image,backing.node-name=backing,backing.file.node-name=backing-file,file.node-name=file"
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check_cache_all()
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{
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# cache.direct is supposed to be inherited by both bs->file and
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# bs->backing
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printf "cache.direct=on on none0\n"
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echo "$hmp_cmds" | run_qemu -drive "$files","$ids",cache.direct=on | grep -e "Cache" -e "[Cc]annot|[Cc]ould not|[Cc]an't"
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printf "\ncache.direct=on on file\n"
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echo "$hmp_cmds" | run_qemu -drive "$files","$ids",file.cache.direct=on | grep -e "Cache" -e "[Cc]annot|[Cc]ould not|[Cc]an't"
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printf "\ncache.direct=on on backing\n"
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echo "$hmp_cmds" | run_qemu -drive "$files","$ids",backing.cache.direct=on | grep -e "Cache" -e "[Cc]annot|[Cc]ould not|[Cc]an't"
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printf "\ncache.direct=on on backing-file\n"
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echo "$hmp_cmds" | run_qemu -drive "$files","$ids",backing.file.cache.direct=on | grep -e "Cache" -e "[Cc]annot|[Cc]ould not|[Cc]an't"
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# cache.writeback is supposed to be inherited by bs->backing; bs->file
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# always gets cache.writeback=on
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printf "\n\ncache.writeback=off on none0\n"
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echo "$hmp_cmds" | run_qemu -drive "$files","$ids",cache.writeback=off | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
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printf "\ncache.writeback=off on file\n"
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echo "$hmp_cmds" | run_qemu -drive "$files","$ids",file.cache.writeback=off | grep -e "doesn't" -e "does not"
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printf "\ncache.writeback=off on backing\n"
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echo "$hmp_cmds" | run_qemu -drive "$files","$ids",backing.cache.writeback=off | grep -e "doesn't" -e "does not"
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printf "\ncache.writeback=off on backing-file\n"
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echo "$hmp_cmds" | run_qemu -drive "$files","$ids",backing.file.cache.writeback=off | grep -e "doesn't" -e "does not"
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# cache.no-flush is supposed to be inherited by both bs->file and bs->backing
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printf "\n\ncache.no-flush=on on none0\n"
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echo "$hmp_cmds" | run_qemu -drive "$files","$ids",cache.no-flush=on | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
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printf "\ncache.no-flush=on on file\n"
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echo "$hmp_cmds" | run_qemu -drive "$files","$ids",file.cache.no-flush=on | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
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printf "\ncache.no-flush=on on backing\n"
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echo "$hmp_cmds" | run_qemu -drive "$files","$ids",backing.cache.no-flush=on | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
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printf "\ncache.no-flush=on on backing-file\n"
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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"
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}
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echo
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echo "--- Configure cache modes on the command line ---"
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echo
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# First check the inherited cache mode after opening the image.
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hmp_cmds="info block none0
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info block image
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info block file
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info block backing
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info block backing-file"
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check_cache_all
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echo
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echo "--- Cache modes after reopen (live snapshot) ---"
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echo
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# Then trigger a reopen and check that the cache modes are still the same.
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hmp_cmds="snapshot_blkdev -n none0 $TEST_IMG.snap $IMGFMT
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info block
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info block image
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info block file
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info block backing
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info block backing-file"
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check_cache_all
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echo
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echo "--- Change cache modes with reopen (qemu-io command, flags) ---"
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echo
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# This one actually changes the cache mode with the reopen. For this test, the
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# new cache mode is specified in the flags, not as an option.
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hmp_cmds='qemu-io none0 "reopen -c none"
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info block none0
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info block image
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info block file
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info block backing
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info block backing-file'
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check_cache_all
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echo
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echo "--- Change cache modes with reopen (qemu-io command, options) ---"
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echo
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# This one actually changes the cache mode with the reopen. For this test, the
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# new cache mode is specified as an option, not in the flags.
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hmp_cmds='qemu-io none0 "reopen -o cache.direct=on"
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info block none0
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info block image
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info block file
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info block backing
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info block backing-file'
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check_cache_all
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echo
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echo "--- Change cache modes after snapshot ---"
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echo
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# This checks that the original image doesn't inherit from the snapshot
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hmp_cmds="snapshot_blkdev -n none0 $TEST_IMG.snap $IMGFMT
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qemu-io none0 \"reopen -c none\"
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info block none0
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info block image
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info block file
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info block backing
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info block backing-file"
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check_cache_all
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echo
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echo "--- Change cache mode in parent, child has explicit option in JSON ---"
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echo
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# This checks that children with options explicitly set by the json:
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# pseudo-protocol don't inherit these options from their parents.
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#
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# Yes, blkdebug::json:... is criminal, but I can't see another way to have a
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# BDS initialised with the json: pseudo-protocol, but still have it inherit
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# options from its parent node.
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hmp_cmds="qemu-io none0 \"reopen -o cache.direct=on,cache.no-flush=on\"
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info block none0
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info block image
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info block blkdebug
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info block file"
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echo "$hmp_cmds" | run_qemu -drive if=none,file="blkdebug::json:{\"filename\":\"$TEST_IMG\",,\"cache\":{\"direct\":false}}",node-name=image,file.node-name=blkdebug,file.image.node-name=file | grep "Cache"
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echo
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echo "=== Check that referenced BDSes don't inherit ==="
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echo
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drv_bkfile="if=none,driver=file,filename=$TEST_IMG.base,node-name=backing-file"
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drv_bk="if=none,file=json:{'driver':'$IMGFMT',,'file':'backing-file',,'node-name':'backing'}"
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drv_file="if=none,driver=file,filename=$TEST_IMG,node-name=file"
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drv_img="if=none,id=blk,file=json:{'driver':'$IMGFMT',,'file':'file',,'backing':'backing',,'node-name':'image'}"
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check_cache_all_separate()
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{
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# Check cache.direct
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printf "cache.direct=on on blk\n"
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echo "$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"
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printf "\ncache.direct=on on file\n"
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echo "$hmp_cmds" | run_qemu -drive "$drv_bkfile" -drive "$drv_bk" -drive "$drv_file",cache.direct=on -drive "$drv_img" | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
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printf "\ncache.direct=on on backing\n"
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echo "$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"
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printf "\ncache.direct=on on backing-file\n"
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echo "$hmp_cmds" | run_qemu -drive "$drv_bkfile",cache.direct=on -drive "$drv_bk" -drive "$drv_file" -drive "$drv_img" | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
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# Check cache.writeback
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printf "\n\ncache.writeback=off on blk\n"
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echo "$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"
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printf "\ncache.writeback=off on file\n"
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echo "$hmp_cmds" | run_qemu -drive "$drv_bkfile" -drive "$drv_bk" -drive "$drv_file",cache.writeback=off -drive "$drv_img" | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
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printf "\ncache.writeback=off on backing\n"
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echo "$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"
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printf "\ncache.writeback=off on backing-file\n"
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echo "$hmp_cmds" | run_qemu -drive "$drv_bkfile",cache.writeback=off -drive "$drv_bk" -drive "$drv_file" -drive "$drv_img" | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
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# Check cache.no-flush
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printf "\n\ncache.no-flush=on on blk\n"
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echo "$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"
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printf "\ncache.no-flush=on on file\n"
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echo "$hmp_cmds" | run_qemu -drive "$drv_bkfile" -drive "$drv_bk" -drive "$drv_file",cache.no-flush=on -drive "$drv_img" | grep -e "Cache" -e "[Cc]annot\|[Cc]ould not\|[Cc]an't"
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printf "\ncache.no-flush=on on backing\n"
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echo "$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"
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printf "\ncache.no-flush=on on backing-file\n"
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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"
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}
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echo
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echo "--- Configure cache modes on the command line ---"
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echo
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# First check the inherited cache mode after opening the image.
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hmp_cmds="info block image
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info block file
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info block backing
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info block backing-file"
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check_cache_all_separate
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echo
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echo "--- Cache modes after reopen (live snapshot) ---"
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echo
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# Then trigger a reopen and check that the cache modes are still the same.
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hmp_cmds="snapshot_blkdev -n blk $TEST_IMG.snap $IMGFMT
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info block blk
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info block image
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info block file
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info block backing
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info block backing-file"
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check_cache_all_separate
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echo
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echo "--- Change cache modes with reopen (qemu-io command, flags) ---"
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echo
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# This one actually changes the cache mode with the reopen. For this test, the
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# new cache mode is specified as flags, not as option.
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hmp_cmds='qemu-io blk "reopen -c none"
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info block image
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info block file
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info block backing
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info block backing-file'
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check_cache_all_separate
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echo
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echo "=== Reopening children instead of the root ==="
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echo
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files="if=none,file=$TEST_IMG,backing.file.filename=$TEST_IMG.base"
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ids="node-name=image,backing.node-name=backing,backing.file.node-name=backing-file,file.node-name=file"
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echo
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echo "--- Basic reopen ---"
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echo
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hmp_cmds='qemu-io none0 "reopen -o backing.cache.direct=on"
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info block none0
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info block image
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info block file
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info block backing
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info block backing-file'
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check_cache_all
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echo
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echo "--- Change cache mode after reopening child ---"
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echo
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# This checks that children with options explicitly set with reopen don't
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# inherit these options from their parents any more
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# TODO Implement node-name support for 'qemu-io' HMP command for -c
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# Can use only -o to access child node options for now
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hmp_cmds="qemu-io none0 \"reopen -o file.cache.direct=off,file.cache.no-flush=off\"
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qemu-io none0 \"reopen -o backing.file.cache.direct=off,backing.file.cache.no-flush=on\"
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qemu-io none0 \"reopen -c none\"
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info block image
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info block file
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info block backing
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info block backing-file"
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echo "$hmp_cmds" | run_qemu -drive "$files","$ids" | grep "Cache"
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echo
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echo "--- Alignment after changing O_DIRECT ---"
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echo
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# Directly test the protocol level: Can unaligned requests succeed even if
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# O_DIRECT was only enabled through a reopen and vice versa?
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# Ensure image size is a multiple of the sector size (required for O_DIRECT)
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$QEMU_IMG create -f file "$TEST_IMG" 1M | _filter_img_create
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# And write some data (not strictly necessary, but it feels better to actually
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# have something to be read)
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$QEMU_IO -f file -c 'write 0 4096' "$TEST_IMG" | _filter_qemu_io
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$QEMU_IO --cache=writeback -f file $TEST_IMG <<EOF | _filter_qemu_io
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read 42 42
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reopen -o cache.direct=on
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read 42 42
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reopen -o cache.direct=off
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read 42 42
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EOF
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$QEMU_IO --cache=none -f file $TEST_IMG <<EOF | _filter_qemu_io
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read 42 42
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reopen -o cache.direct=off
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read 42 42
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reopen -o cache.direct=on
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read 42 42
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EOF
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# success, all done
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echo "*** done"
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rm -f $seq.full
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status=0
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