tests/test-error-triggered.sh

   1 #!/usr/bin/env bash
   2 # nbdkit
   3 # Copyright Red Hat
   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_uri
  38
  39 sock=$(mktemp -u /tmp/nbdkit-test-sock.XXXXXX)
  40 files="$sock error-triggered.pid error-trigger"
  41 rm -f $files
  42 cleanup_fn rm -f $files
  43
  44 # Run nbdkit with the error filter.
  45 start_nbdkit -P error-triggered.pid -U $sock \
  46              --filter=error \
  47              pattern 1G \
  48              error-rate=100% error-file=error-trigger error=ENOSPC
  49
  50 nbdsh --connect "nbd+unix://?socket=$sock" \
  51           -c '
  52 import os
  53
  54 # The first operations should be fine.
  55 h.pread(512, 0)
  56 h.pread(512, 512)
  57 h.pread(512, 1024)
  58
  59 # Then we create the error-trigger file which should cause
  60 # subsequent operations to fail with ENOSPC.
  61 open("error-trigger", "a").close()
  62
  63 try:
  64     h.pread(512, 0)
  65     # This should not happen.
  66     exit(1)
  67 except nbd.Error as ex:
  68     # Check the errno is expected.
  69     assert ex.errno == "ENOSPC"
  70
  71 # Remove the error-trigger file, operations should all succeed again.
  72 os.unlink("error-trigger")
  73
  74 h.pread(512, 0)
  75 h.pread(512, 512)
  76 h.pread(512, 1024)
  77 '