tests/qemu-iotests/241

   1 #!/bin/bash
   2 #
   3 # Test qemu-nbd vs. unaligned images
   4 #
   5 # Copyright (C) 2018-2019 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 seq="$(basename $0)"
  22 echo "QA output created by $seq"
  23
  24 status=1 # failure is the default!
  25
  26 nbd_unix_socket=$TEST_DIR/test_qemu_nbd_socket
  27
  28 _cleanup()
  29 {
  30     _cleanup_test_img
  31     nbd_server_stop
  32 }
  33 trap "_cleanup; exit \$status" 0 1 2 3 15
  34
  35 # get standard environment, filters and checks
  36 . ./common.rc
  37 . ./common.filter
  38 . ./common.nbd
  39
  40 _supported_fmt raw
  41 _supported_proto nbd
  42 _supported_os Linux
  43 _require_command QEMU_NBD
  44
  45 # can't use _make_test_img, because qemu-img rounds image size up,
  46 # and because we want to use Unix socket rather than TCP port. Likewise,
  47 # we have to redirect TEST_IMG to our server.
  48 # This tests that we can deal with the hole at the end of an unaligned
  49 # raw file (either because the server doesn't advertise alignment too
  50 # large, or because the client ignores the server's noncompliance - even
  51 # though we can't actually wire iotests into checking trace messages).
  52 printf %01000d 0 > "$TEST_IMG_FILE"
  53 TEST_IMG="nbd:unix:$nbd_unix_socket"
  54
  55 echo
  56 echo "=== Exporting unaligned raw image, natural alignment ==="
  57 echo
  58
  59 nbd_server_start_unix_socket -f $IMGFMT "$TEST_IMG_FILE"
  60
  61 $QEMU_NBD_PROG --list -k $nbd_unix_socket | grep '\(size\|min\)'
  62 $QEMU_IMG map -f raw --output=json "$TEST_IMG" | _filter_qemu_img_map
  63 $QEMU_IO -f raw -c map "$TEST_IMG"
  64 nbd_server_stop
  65
  66 echo
  67 echo "=== Exporting unaligned raw image, forced server sector alignment ==="
  68 echo
  69
  70 # Intentionally omit '-f' to force image probing, which in turn forces
  71 # sector alignment, here at the server.
  72 nbd_server_start_unix_socket "$TEST_IMG_FILE"
  73
  74 $QEMU_NBD_PROG --list -k $nbd_unix_socket | grep '\(size\|min\)'
  75 $QEMU_IMG map -f raw --output=json "$TEST_IMG" | _filter_qemu_img_map
  76 $QEMU_IO -f raw -c map "$TEST_IMG"
  77 nbd_server_stop
  78
  79 echo
  80 echo "=== Exporting unaligned raw image, forced client sector alignment ==="
  81 echo
  82
  83 # Now force sector alignment at the client.
  84 nbd_server_start_unix_socket -f $IMGFMT "$TEST_IMG_FILE"
  85
  86 $QEMU_NBD_PROG --list -k $nbd_unix_socket | grep '\(size\|min\)'
  87 $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map
  88 $QEMU_IO -c map "$TEST_IMG"
  89 nbd_server_stop
  90
  91 # Not tested yet: we also want to ensure that qemu as NBD client does
  92 # not access beyond the end of a server's advertised unaligned size:
  93 #  nbdkit -U - memory size=513 --run 'qemu-io -f raw -c "r 512 512" $nbd'
  94 # However, since qemu as server always rounds up to a sector alignment,
  95 # we would have to use nbdkit to provoke the current client failures.
  96
  97 # success, all done
  98 echo '*** done'
  99 rm -f $seq.full
 100 status=0