tests/test-disconnect.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 -x
  35
  36 requires_nbdsh_uri
  37
  38 plugin=.libs/test-disconnect-plugin.$SOEXT
  39 requires test -f $plugin
  40
  41 sock=$(mktemp -u /tmp/nbdkit-test-sock.XXXXXX)
  42 files="disconnect.pid $sock"
  43 cleanup_fn rm -f $files
  44
  45 # Start nbdkit with the disconnect plugin, which has delayed reads and
  46 # does disconnect on write based on export name.
  47 start_nbdkit -P disconnect.pid -U $sock $plugin
  48
  49 pid=`cat disconnect.pid`
  50
  51 # Empty export name does soft disconnect on write; the write and the
  52 # pending read should still succeed, but second read attempt should fail.
  53 nbdsh -u "nbd+unix:///?socket=$sock" -c '
  54 import errno
  55
  56 def waitfor(cookie):
  57   while True:
  58     c = h.aio_peek_command_completed()
  59     if c:
  60       break
  61     h.poll(-1)
  62   assert c == cookie
  63
  64 buf = nbd.Buffer(1)
  65 c1 = h.aio_pread(buf, 1)
  66 c2 = h.aio_pwrite(buf, 2)
  67 waitfor(c2)
  68 h.aio_command_completed(c2)
  69 c3 = h.aio_pread(buf, 3)
  70 waitfor(c3)
  71 try:
  72   h.aio_command_completed(c3)
  73   assert False
  74 except nbd.Error as ex:
  75   assert ex.errnum == errno.ESHUTDOWN
  76 waitfor(c1)
  77 h.aio_command_completed(c1)
  78 h.shutdown()
  79 '
  80
  81 # Non-empty export name does hard disconnect on write. The write and the
  82 # pending read should fail with lost connection.
  83 nbdsh -u "nbd+unix:///a?socket=$sock" -c '
  84 import errno
  85
  86 buf = nbd.Buffer(1)
  87 c1 = h.aio_pread(buf, 1)
  88 c2 = h.aio_pwrite(buf, 2)
  89 while h.aio_in_flight() > 1:
  90   h.poll(-1)
  91 assert h.aio_is_ready() is False
  92 try:
  93   h.aio_command_completed(c1)
  94   assert False
  95 except nbd.Error as ex:
  96   assert ex.errnum == errno.ENOTCONN
  97 try:
  98   h.aio_command_completed(c2)
  99   assert False
 100 except nbd.Error as ex:
 101   assert ex.errnum == errno.ENOTCONN
 102 '
 103
 104 # nbdkit should still be running
 105 kill -s 0 $pid