tests/test-memory-largest.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 # Test the memory plugin with the largest possible size supported by
  34 # nbdkit.  By using nbdsh (libnbd) as the client we are able to read
  35 # the final 511 byte "sector" which eludes qemu.
  36
  37 source ./functions.sh
  38 set -e
  39
  40 requires_nbdsh_uri
  41
  42 sock=$(mktemp -u /tmp/nbdkit-test-sock.XXXXXX)
  43 files="memory-largest.pid $sock"
  44 rm -f $files
  45 cleanup_fn rm -f $files
  46
  47 # Run nbdkit with memory plugin.
  48 # size = 2^63-1
  49 start_nbdkit -P memory-largest.pid -U $sock memory 9223372036854775807
  50
  51 nbdsh --connect "nbd+unix://?socket=$sock" \
  52       -c '
  53 # Write some stuff to the beginning, middle and end.
  54 buf1 = b"1" * 512
  55 h.pwrite(buf1, 0)
  56 buf2 = b"2" * 65536
  57 h.pwrite(buf2, 1000000001)
  58 buf3 = b"3" * 511
  59 h.pwrite(buf3, 9223372036854775296)
  60
  61 # Read it back.
  62 buf11 = h.pread(len(buf1), 0)
  63 assert buf1 == buf11
  64 buf22 = h.pread(len(buf2), 1000000001)
  65 assert buf2 == buf22
  66 buf33 = h.pread(len(buf3), 9223372036854775296)
  67 assert buf3 == buf33
  68 '