tests/test-retry-extents.sh

   1 #!/usr/bin/env bash
   2 # nbdkit
   3 # Copyright (C) 2018-2019 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 set -e
  35 set -x
  36
  37 requires nbdsh --base-allocation -c 'quit()'
  38
  39 files="retry-extents-count retry-extents-open-count"
  40 rm -f $files
  41 cleanup_fn rm -f $files
  42
  43 touch retry-extents-count retry-extents-open-count
  44 start_t=$SECONDS
  45
  46 # Create a custom plugin which will test retrying.
  47 nbdkit -v -U - \
  48        sh - \
  49        --filter=retry retry-delay=1 \
  50        --run 'nbdsh --base-allocation --uri $uri -c "
  51 entries = []
  52 def f (metacontext, offset, e, err):
  53     global entries
  54     assert err.value == 0
  55     assert metacontext == nbd.CONTEXT_BASE_ALLOCATION
  56     entries = e
  57 h.block_status (1024, 0, f)
  58 assert entries == [ 512, 0,
  59                     512, 3]
  60        "' <<'EOF'
  61 #!/usr/bin/env bash
  62 case "$1" in
  63     open)
  64         # Count how many times the connection is (re-)opened.
  65         read i < retry-extents-open-count
  66         echo $((i+1)) > retry-extents-open-count
  67         ;;
  68     extents)
  69         # Fail in three different ways then succeed.
  70         read i < retry-extents-count
  71         ((i++))
  72         echo $i > retry-extents-count
  73         case $i in
  74           1) echo "EIO pread failed" >&2; exit 1;;
  75           2) echo "garbage"
  76              exit 0;;
  77           3) echo "0 512 0"
  78              echo "garbage"
  79              exit 0;;
  80           *) echo "0 512 0"
  81              echo "512 512 3"
  82              exit 0;;
  83         esac
  84         ;;
  85
  86     can_extents) exit 0 ;;
  87     get_size) echo 1024 ;;
  88     *) exit 2 ;;
  89 esac
  90 EOF
  91
  92 # In this test we should see 3 failures:
  93 # extents FAILS
  94 # retry and wait 1 seconds
  95 # extents FAILS
  96 # retry and wait 2 seconds
  97 # extents FAILS
  98 # retry and wait 4 seconds
  99 # extents succeeds
 100
 101 # The minimum time for the test should be 1+2+4 = 7 seconds.
 102 end_t=$SECONDS
 103 if [ $((end_t - start_t)) -lt 7 ]; then
 104     echo "$0: test ran too quickly"
 105     exit 1
 106 fi
 107
 108 # Check the handle was opened 4 times (first open + one reopen for
 109 # each retry).
 110 read open_count < retry-extents-open-count
 111 if [ $open_count -ne 4 ]; then
 112     echo "$0: open-count ($open_count) != 4"
 113     exit 1
 114 fi