iotests/iov-padding: New test
Test that even vectored IO requests with 1024 vector elements that are not aligned to the device's request alignment will succeed. Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru> Signed-off-by: Hanna Czenczek <hreitz@redhat.com> Message-Id: <20230411173418.19549-5-hreitz@redhat.com>
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Hanna Czenczek
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cc63f6f6fa
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85
tests/qemu-iotests/tests/iov-padding
Executable file
85
tests/qemu-iotests/tests/iov-padding
Executable file
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#!/usr/bin/env bash
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# group: rw quick
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#
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# Check the interaction of request padding (to fit alignment restrictions) with
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# vectored I/O from the guest
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#
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# Copyright Red Hat
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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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seq=$(basename $0)
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echo "QA output created by $seq"
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status=1 # failure is the default!
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_cleanup()
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{
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_cleanup_test_img
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}
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trap "_cleanup; exit \$status" 0 1 2 3 15
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# get standard environment, filters and checks
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cd ..
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. ./common.rc
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. ./common.filter
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_supported_fmt raw
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_supported_proto file
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_make_test_img 1M
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IMGSPEC="driver=blkdebug,align=4096,image.driver=file,image.filename=$TEST_IMG"
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# Four combinations:
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# - Offset 4096, length 1023 * 512 + 512: Fully aligned to 4k
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# - Offset 4096, length 1023 * 512 + 4096: Head is aligned, tail is not
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# - Offset 512, length 1023 * 512 + 512: Neither head nor tail are aligned
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# - Offset 512, length 1023 * 512 + 4096: Tail is aligned, head is not
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for start_offset in 4096 512; do
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for last_element_length in 512 4096; do
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length=$((1023 * 512 + $last_element_length))
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echo
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echo "== performing 1024-element vectored requests to image (offset: $start_offset; length: $length) =="
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# Fill with data for testing
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$QEMU_IO -c 'write -P 1 0 1M' "$TEST_IMG" | _filter_qemu_io
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# 1023 512-byte buffers, and then one with length $last_element_length
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cmd_params="-P 2 $start_offset $(yes 512 | head -n 1023 | tr '\n' ' ') $last_element_length"
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QEMU_IO_OPTIONS="$QEMU_IO_OPTIONS_NO_FMT" $QEMU_IO \
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-c "writev $cmd_params" \
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--image-opts \
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"$IMGSPEC" \
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| _filter_qemu_io
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# Read all patterns -- read the part we just wrote with writev twice,
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# once "normally", and once with a readv, so we see that that works, too
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QEMU_IO_OPTIONS="$QEMU_IO_OPTIONS_NO_FMT" $QEMU_IO \
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-c "read -P 1 0 $start_offset" \
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-c "read -P 2 $start_offset $length" \
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-c "readv $cmd_params" \
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-c "read -P 1 $((start_offset + length)) $((1024 * 1024 - length - start_offset))" \
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--image-opts \
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"$IMGSPEC" \
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| _filter_qemu_io
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done
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done
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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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59
tests/qemu-iotests/tests/iov-padding.out
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59
tests/qemu-iotests/tests/iov-padding.out
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QA output created by iov-padding
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576
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== performing 1024-element vectored requests to image (offset: 4096; length: 524288) ==
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wrote 1048576/1048576 bytes at offset 0
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1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 524288/524288 bytes at offset 4096
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512 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 4096/4096 bytes at offset 0
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4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 524288/524288 bytes at offset 4096
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512 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 524288/524288 bytes at offset 4096
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512 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 520192/520192 bytes at offset 528384
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508 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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== performing 1024-element vectored requests to image (offset: 4096; length: 527872) ==
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wrote 1048576/1048576 bytes at offset 0
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1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 527872/527872 bytes at offset 4096
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515.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 4096/4096 bytes at offset 0
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4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 527872/527872 bytes at offset 4096
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515.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 527872/527872 bytes at offset 4096
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515.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 516608/516608 bytes at offset 531968
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504.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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== performing 1024-element vectored requests to image (offset: 512; length: 524288) ==
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wrote 1048576/1048576 bytes at offset 0
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1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 524288/524288 bytes at offset 512
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512 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 512/512 bytes at offset 0
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 524288/524288 bytes at offset 512
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512 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 524288/524288 bytes at offset 512
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512 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 523776/523776 bytes at offset 524800
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511.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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== performing 1024-element vectored requests to image (offset: 512; length: 527872) ==
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wrote 1048576/1048576 bytes at offset 0
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1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 527872/527872 bytes at offset 512
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515.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 512/512 bytes at offset 0
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 527872/527872 bytes at offset 512
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515.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 527872/527872 bytes at offset 512
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515.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 520192/520192 bytes at offset 528384
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508 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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*** done
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