tests/test-parallel-nbd.sh

   1 #!/usr/bin/env bash
   2 # nbdkit
   3 # Copyright (C) 2017-2019 Red Hat Inc.
   4 #
   5 # Redistribution and use in source and binary forms, with or without
   6 # modification, are permitted provided that the following conditions are
   7 # met:
   8 #
   9 # * Redistributions of source code must retain the above copyright
  10 # notice, this list of conditions and the following disclaimer.
  11 #
  12 # * Redistributions in binary form must reproduce the above copyright
  13 # notice, this list of conditions and the following disclaimer in the
  14 # documentation and/or other materials provided with the distribution.
  15 #
  16 # * Neither the name of Red Hat nor the names of its contributors may be
  17 # used to endorse or promote products derived from this software without
  18 # specific prior written permission.
  19 #
  20 # THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND
  21 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  22 # THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  23 # PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR
  24 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  27 # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  28 # ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  29 # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  30 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31 # SUCH DAMAGE.
  32
  33 source ./functions.sh
  34
  35 # Check file-data was created by Makefile and qemu-io exists.
  36 requires test -f file-data
  37 requires qemu-io --version
  38
  39 nbdkit --dump-plugin nbd | grep -q ^thread_model=parallel ||
  40     { echo "nbdkit lacks support for parallel requests"; exit 77; }
  41
  42 sock=`mktemp -u`
  43 files="test-parallel-nbd.out $sock test-parallel-nbd.data test-parallel-nbd.pid"
  44 rm -f $files
  45 cleanup_fn rm -f $files
  46
  47 # Populate file, and sanity check that qemu-io can issue parallel requests
  48 printf '%1024s' . > test-parallel-nbd.data
  49 qemu-io -f raw -c "aio_write -P 1 0 512" -c "aio_write -P 2 512 512" \
  50          -c aio_flush test-parallel-nbd.data ||
  51     { echo "'qemu-io' can't drive parallel requests"; exit 77; }
  52
  53 # Set up the file plugin to delay both reads and writes (for a good chance
  54 # that parallel requests are in flight), and with writes longer than reads
  55 # (to more easily detect if out-of-order completion happens).  This test
  56 # may have spurious failures under heavy loads on the test machine, where
  57 # tuning the delays may help.
  58
  59 start_nbdkit -P test-parallel-nbd.pid \
  60              -U $sock \
  61              --filter=delay \
  62              file test-parallel-nbd.data wdelay=2 rdelay=1
  63
  64 # With --threads=1, the write should complete first because it was issued first
  65 nbdkit -v -t 1 -U - nbd socket=$sock --run '
  66   qemu-io -f raw -c "aio_write -P 2 512 512" -c "aio_read -P 1 0 512" \
  67   -c aio_flush $nbd' | tee test-parallel-nbd.out
  68 if test "$(grep '512/512' test-parallel-nbd.out)" != \
  69 "wrote 512/512 bytes at offset 512
  70 read 512/512 bytes at offset 0"; then
  71   exit 1
  72 fi
  73
  74 # With default --threads, the faster read should complete first
  75 nbdkit -v -U - nbd socket=$sock --run '
  76   qemu-io -f raw -c "aio_write -P 2 512 512" -c "aio_read -P 1 0 512" \
  77   -c aio_flush $nbd' | tee test-parallel-nbd.out
  78 if test "$(grep '512/512' test-parallel-nbd.out)" != \
  79 "read 512/512 bytes at offset 0
  80 wrote 512/512 bytes at offset 512"; then
  81   exit 1
  82 fi