interop/interop-qemu-block-size.sh

   1 #!/usr/bin/env bash
   2 # nbd client library in userspace
   3 # Copyright Red Hat
   4 #
   5 # This library is free software; you can redistribute it and/or
   6 # modify it under the terms of the GNU Lesser General Public
   7 # License as published by the Free Software Foundation; either
   8 # version 2 of the License, or (at your option) any later version.
   9 #
  10 # This library is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 # Lesser General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU Lesser General Public
  16 # License along with this library; if not, write to the Free Software
  17 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  18
  19 # Test interop with qemu-nbd block sizes.
  20
  21 source ../tests/functions.sh
  22 set -e
  23 set -x
  24
  25 # versions of qemu-nbd older than 4.0 reported inaccurate block sizes
  26 # Use 'qemu-nbd --list' as our witness, it was also added in 4.0
  27 requires qemu-nbd --list --version
  28 requires nbdsh --version
  29 requires qemu-img --version
  30 requires truncate --version
  31 requires timeout --version
  32
  33 f="qemu-block-size.raw"
  34 sock=$(mktemp -u /tmp/interop-qemu.XXXXXX)
  35 rm -f $f $sock
  36 cleanup_fn rm -f $f $sock
  37
  38 truncate --size=10M $f
  39 export sock
  40 fail=0
  41
  42 # run_test FMT REQUEST EXP_INFO EXP_GO
  43 run_test() {
  44     rm -f $sock
  45     # No -t or -e, so qemu-nbd should exit once nbdsh disconnects
  46     timeout 60s qemu-nbd -k $sock $1 $f &
  47     pid=$!
  48     # Wait for the socket to appear
  49     for i in {1..30}; do
  50         if test -e $sock; then
  51             break
  52         fi
  53         sleep 1
  54     done
  55     $VG nbdsh -c - <<EOF
  56 import os
  57
  58 sock = os.environ["sock"]
  59
  60 h.set_opt_mode(True)
  61 assert h.get_request_block_size()
  62 h.set_request_block_size($2)
  63 assert h.get_request_block_size() is $2
  64 h.connect_unix(sock)
  65
  66 if not h.aio_is_negotiating():
  67     h.shutdown()
  68     exit(77)    # Oldstyle negotiation lacks block size advertisement
  69
  70 try:
  71     h.opt_info()
  72     assert h.get_block_size(nbd.SIZE_MINIMUM) == $3
  73 except nbd.Error:
  74     assert $3 == 0
  75
  76 h.opt_go()
  77 assert h.get_block_size(nbd.SIZE_MINIMUM) == $4
  78
  79 h.shutdown()
  80 EOF
  81     st=$?
  82     if [ $st = 77 ]; then
  83         echo "$0: skipping: qemu-nbd too old for this test"
  84         exit 77
  85     elif [ $st != 0 ]; then
  86         fail=1
  87     fi
  88     wait $pid || fail=1
  89 }
  90
  91 # Without '-f raw', qemu-nbd forces sector granularity to prevent writing
  92 # to sector 0 from changing the disk type.  However, if the client does
  93 # not request block sizes, it reports a size then errors out for NBD_OPT_INFO,
  94 # while fudging size for NBD_OPT_GO.
  95 run_test '' True 512 512
  96 run_test '' False 0 1
  97
  98 # With '-f raw', qemu-nbd always exposes byte-level granularity for files.
  99 run_test '-f raw' True 1 1
 100 run_test '-f raw' False 1 1
 101
 102 exit $fail