tests/test-ondemand-locking.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
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   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
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  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 # Test mutual exclusion between clients with the ondemand plugin.
  34
  35 source ./functions.sh
  36 set -e
  37 set -x
  38
  39 requires_plugin ondemand
  40 requires nbdsh --version
  41
  42 # This plugin requires a mkfs command of some sort.
  43 requires mkfs --version
  44
  45 dir=$(mktemp -d /tmp/nbdkit-test-dir.XXXXXX)
  46 cleanup_fn rm -rf $dir
  47
  48 sock=$(mktemp -u /tmp/nbdkit-test-sock.XXXXXX)
  49 files="ondemand-locking.pid $sock"
  50 rm -f $files
  51 cleanup_fn rm -f $files
  52
  53 # Run nbdkit.
  54 start_nbdkit -P ondemand-locking.pid -U $sock --log=stderr \
  55              ondemand dir=$dir size=100M
  56
  57 export sock
  58 nbdsh -c - <<'EOF'
  59 import os
  60 sock = os.environ["sock"]
  61
  62 # Open export1 with the default nbdsh handle.
  63 # This should take an exclusive lock.
  64 h.set_export_name("export1")
  65 h.connect_unix(sock)
  66
  67 # Trying to reopen export1 on a new handle should fail.
  68 h2 = nbd.NBD()
  69 h2.set_export_name("export1")
  70 try:
  71     h2.connect_unix(sock)
  72 except nbd.Error:
  73     pass
  74
  75 # But opening a different export should succeed.
  76 h3 = nbd.NBD()
  77 h3.set_export_name("export2")
  78 h3.connect_unix(sock)
  79 EOF