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86 lines
2.6 KiB
Bash
86 lines
2.6 KiB
Bash
#!/usr/bin/env bash
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# group: rw quick
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#
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# Test qemu-img vs. unaligned images; O_DIRECT version
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# (Originates from 221)
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#
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# Copyright (C) 2019 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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seq="$(basename $0)"
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echo "QA output created by $seq"
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status=1 # failure is the default!
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_cleanup()
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{
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_cleanup_test_img
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}
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trap "_cleanup; exit \$status" 0 1 2 3 15
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# get standard environment, filters and checks
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. ./common.rc
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. ./common.filter
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_supported_fmt raw
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_supported_proto file
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_supported_os Linux
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_default_cache_mode none
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_supported_cache_modes none directsync
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echo
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echo "=== Check mapping of unaligned raw image ==="
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echo
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# We do not know how large a physical sector is, but it is certainly
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# going to be a factor of 1 MB
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size=$((1 * 1024 * 1024 - 1))
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# qemu-img create rounds size up to BDRV_SECTOR_SIZE
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_make_test_img $size
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$QEMU_IMG map --output=json --image-opts \
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"driver=$IMGFMT,file.driver=file,file.filename=$TEST_IMG,cache.direct=on" \
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| _filter_qemu_img_map
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# so we resize it and check again
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truncate --size=$size "$TEST_IMG"
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$QEMU_IMG map --output=json --image-opts \
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"driver=$IMGFMT,file.driver=file,file.filename=$TEST_IMG,cache.direct=on" \
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| _filter_qemu_img_map
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# qemu-io with O_DIRECT always writes whole physical sectors. Again,
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# we do not know how large a physical sector is, so we just start
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# writing from a 64 kB boundary, which should always be aligned.
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offset=$((1 * 1024 * 1024 - 64 * 1024))
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$QEMU_IO -c "w $offset $((size - offset))" "$TEST_IMG" | _filter_qemu_io
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$QEMU_IMG map --output=json --image-opts \
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"driver=$IMGFMT,file.driver=file,file.filename=$TEST_IMG,cache.direct=on" \
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| _filter_qemu_img_map
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# Resize it and check again -- contrary to 221, we may not get partial
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# sectors here, so there should be only two areas (one zero, one
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# data).
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truncate --size=$size "$TEST_IMG"
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$QEMU_IMG map --output=json --image-opts \
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"driver=$IMGFMT,file.driver=file,file.filename=$TEST_IMG,cache.direct=on" \
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| _filter_qemu_img_map
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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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