cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
Log | Files | Refs | Submodules | LICENSE | sfeed.txt

277 (3085B)

      1#!/usr/bin/env python3
      2# group: rw quick
      3#
      4# Test NBD client reconnection
      5#
      6# Copyright (c) 2019 Virtuozzo International GmbH
      7#
      8# This program is free software; you can redistribute it and/or modify
      9# it under the terms of the GNU General Public License as published by
     10# the Free Software Foundation; either version 2 of the License, or
     11# (at your option) any later version.
     12#
     13# This program is distributed in the hope that it will be useful,
     14# but WITHOUT ANY WARRANTY; without even the implied warranty of
     15# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     16# GNU General Public License for more details.
     17#
     18# You should have received a copy of the GNU General Public License
     19# along with this program.  If not, see <http://www.gnu.org/licenses/>.
     20#
     21
     22import os
     23import subprocess
     24import iotests
     25from iotests import file_path, log
     26
     27iotests.script_initialize()
     28
     29
     30nbd_sock, conf_file = file_path('nbd-sock', 'nbd-fault-injector.conf')
     31
     32
     33def make_conf_file(event):
     34    """
     35    Create configuration file for the nbd-fault-injector.py
     36
     37    :param event: which event the server should close a connection on
     38    """
     39    with open(conf_file, 'w') as conff:
     40        conff.write('[inject-error]\nevent={}\nwhen=after'.format(event))
     41
     42
     43def start_server_NBD(event):
     44    make_conf_file(event)
     45
     46    srv = subprocess.Popen(['./nbd-fault-injector.py', '--classic-negotiation',
     47                           nbd_sock, conf_file], stdout=subprocess.PIPE,
     48                           stderr=subprocess.STDOUT, universal_newlines=True)
     49    line = srv.stdout.readline()
     50    if 'Listening on ' in line:
     51        log('NBD server: started')
     52    else:
     53        log('NBD server: ' + line.rstrip())
     54
     55    return srv
     56
     57
     58def start_client_NBD():
     59    log('NBD client: QEMU-IO write')
     60    args = iotests.qemu_io_args_no_fmt + \
     61        ['-c', 'write -P 0x7 0 3M', '--image-opts',
     62         'driver=nbd,server.type=unix,server.path={},'
     63         'reconnect-delay=7'.format(nbd_sock)]
     64    clt = subprocess.Popen(args, stdout=subprocess.PIPE,
     65                           stderr=subprocess.STDOUT,
     66                           universal_newlines=True)
     67    return clt
     68
     69
     70def check_proc_NBD(proc, connector):
     71    try:
     72        outs, errs = proc.communicate(timeout=10)
     73
     74        if proc.returncode < 0:
     75            log('NBD {}: EXIT SIGNAL {}\n'.format(connector, proc.returncode))
     76            log(outs)
     77        else:
     78            msg = outs.split('\n', 1)
     79            log('NBD {}: {}'.format(connector, msg[0]))
     80
     81    except subprocess.TimeoutExpired:
     82        proc.kill()
     83        log('NBD {}: ERROR timeout expired'.format(connector))
     84    finally:
     85        if connector == 'server':
     86            os.remove(nbd_sock)
     87            os.remove(conf_file)
     88
     89
     90srv = start_server_NBD('data')
     91clt = start_client_NBD()
     92# The server should close the connection after a client write request
     93check_proc_NBD(srv, 'server')
     94# Start the NBD server again
     95srv = start_server_NBD('reply')
     96# The client should reconnect and complete the write operation
     97check_proc_NBD(clt, 'client')
     98# Make it sure that server terminated
     99check_proc_NBD(srv, 'server')