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1 #!/usr/bin/env bash 2 # group: rw quick 3 # 4 # Test qemu-img vs. unaligned images; O_DIRECT version 5 # (Originates from 221) 6 # 7 # Copyright (C) 2019 Red Hat, Inc. 8 # 9 # This program is free software; you can redistribute it and/or modify 10 # it under the terms of the GNU General Public License as published by 11 # the Free Software Foundation; either version 2 of the License, or 12 # (at your option) any later version. 13 # 14 # This program is distributed in the hope that it will be useful, 15 # but WITHOUT ANY WARRANTY; without even the implied warranty of 16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 # GNU General Public License for more details. 18 # 19 # You should have received a copy of the GNU General Public License 20 # along with this program. If not, see <http://www.gnu.org/licenses/>. 21 # 22 23 seq="$(basename $0)" 24 echo "QA output created by $seq" 25 26 status=1 # failure is the default! 27 28 _cleanup() 29 { 30 _cleanup_test_img 31 } 32 trap "_cleanup; exit \$status" 0 1 2 3 15 33 34 # get standard environment, filters and checks 35 . ./common.rc 36 . ./common.filter 37 38 _supported_fmt raw 39 _supported_proto file 40 _supported_os Linux 41 42 _default_cache_mode none 43 _supported_cache_modes none directsync 44 45 echo 46 echo "=== Check mapping of unaligned raw image ===" 47 echo 48 49 # We do not know how large a physical sector is, but it is certainly 50 # going to be a factor of 1 MB 51 size=$((1 * 1024 * 1024 - 1)) 52 53 # qemu-img create rounds size up to BDRV_SECTOR_SIZE 54 _make_test_img $size 55 $QEMU_IMG map --output=json --image-opts \ 56 "driver=$IMGFMT,file.driver=file,file.filename=$TEST_IMG,cache.direct=on" \ 57 | _filter_qemu_img_map 58 59 # so we resize it and check again 60 truncate --size=$size "$TEST_IMG" 61 $QEMU_IMG map --output=json --image-opts \ 62 "driver=$IMGFMT,file.driver=file,file.filename=$TEST_IMG,cache.direct=on" \ 63 | _filter_qemu_img_map 64 65 # qemu-io with O_DIRECT always writes whole physical sectors. Again, 66 # we do not know how large a physical sector is, so we just start 67 # writing from a 64 kB boundary, which should always be aligned. 68 offset=$((1 * 1024 * 1024 - 64 * 1024)) 69 $QEMU_IO -c "w $offset $((size - offset))" "$TEST_IMG" | _filter_qemu_io 70 $QEMU_IMG map --output=json --image-opts \ 71 "driver=$IMGFMT,file.driver=file,file.filename=$TEST_IMG,cache.direct=on" \ 72 | _filter_qemu_img_map 73 74 # Resize it and check again -- contrary to 221, we may not get partial 75 # sectors here, so there should be only two areas (one zero, one 76 # data). 77 truncate --size=$size "$TEST_IMG" 78 $QEMU_IMG map --output=json --image-opts \ 79 "driver=$IMGFMT,file.driver=file,file.filename=$TEST_IMG,cache.direct=on" \ 80 | _filter_qemu_img_map 81 82 # success, all done 83 echo '*** done' 84 rm -f $seq.full 85 status=0