#!/usr/bin/env bash
# nbdkit
# Copyright Red Hat
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# * Neither the name of Red Hat nor the names of its contributors may be
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# specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
# PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.

# Test nbd vsock= option.
#
# This test is only possible on Linux >= 5.6 because that is the first
# version supporting loopback AF_VSOCK (so you can run client and
# server on the same host without needing to use a virtual machine).
#
# It also requires nbdsh with vsock support, and tests that 32 bit
# ports are supported - ie. that we didn't make any 16 bit assumptions
# about port numbers anywhere in the stack.

source ./functions.sh
set -e
set -x

requires_run
requires_nbdsh_uri
requires nbdsh -c 'print(h.connect_vsock)'
requires_linux_kernel_version 5.6
requires_vsock_support

# Because vsock ports are 32 bits, we can basically pick one at random
# and be sure that it's not used.  However we must pick one >= 1024
# because the ports below this are privileged.
port=$(( 1024 + $RANDOM + ($RANDOM << 16) ))

files="nbd-vsock.pid"
rm -f $files
cleanup_fn rm -f $files

# Run nbdkit as a vsock server.
start_nbdkit -P nbd-vsock.pid --vsock --port $port memory 1M

# Run a second nbdkit as a vsock->Unix bridge.
nbdkit nbd vsock=1 port=$port --run 'nbdsh -u "$uri" -c "
size = h.get_size()
assert size == 1048576
"'
