tests/test-pattern-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
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   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
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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 the pattern 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="pattern-largest.pid $sock"
  44 rm -f $files
  45 cleanup_fn rm -f $files
  46
  47 # Run nbdkit with pattern plugin.
  48 # size = 2^63-1
  49 start_nbdkit -P pattern-largest.pid -U $sock \
  50        pattern 9223372036854775807
  51
  52 nbdsh --connect "nbd+unix://?socket=$sock" \
  53       -c '
  54 # Construct what we expect to see in the last 511 bytes.
  55 expected = b""
  56 for i in range(0, 512-8, 8):
  57     expected = expected + \
  58                bytes([0x7f, 0xff, 0xff, 0xff, \
  59                       0xff, 0xff, 0xfe + (i >> 8), i & 255])
  60 # final byte is truncated so we have to deal with last 7
  61 # bytes specially ...
  62 expected = expected + b"\x7f\xff\xff\xff\xff\xff\xff"
  63
  64 # Read and compare.
  65 buf = h.pread(511, 9223372036854775296)
  66 print("buf = %r\nexpected = %r\n" % (buf, expected))
  67 assert buf == expected
  68 '