#!/usr/bin/env python3
#
# Copyright (c) 2017 Red Hat Inc
#
# Author:
# Eduardo Habkost <ehabkost@redhat.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
"""
Run QEMU with all combinations of -machine and -device types,
check for crashes and unexpected errors.
"""
import os
import sys
import glob
import logging
import traceback
import re
import random
import argparse
from itertools import chain
sys.path.append(os.path.join(os.path.dirname(__file__), '..', 'python'))
from qemu.machine import QEMUMachine
logger = logging.getLogger('device-crash-test')
dbg = logger.debug
# Purposes of the following whitelist:
# * Avoiding verbose log messages when we find known non-fatal
# (exitcode=1) errors
# * Avoiding fatal errors when we find known crashes
# * Skipping machines/devices that are known not to work out of
# the box, when running in --quick mode
#
# Keeping the whitelist updated is desirable, but not required,
# because unexpected cases where QEMU exits with exitcode=1 will
# just trigger a INFO message.
# Valid whitelist entry keys:
# * accel: regexp, full match only
# * machine: regexp, full match only
# * device: regexp, full match only
# * log: regexp, partial match allowed
# * exitcode: if not present, defaults to 1. If None, matches any exitcode
# * warn: if True, matching failures will be logged as warnings
# * expected: if True, QEMU is expected to always fail every time
# when testing the corresponding test case
# * loglevel: log level of log output when there's a match.
ERROR_WHITELIST = [
# Machines that won't work out of the box:
# MACHINE | ERROR MESSAGE
{'machine':'niagara', 'expected':True}, # Unable to load a firmware for -M niagara
{'machine':'boston', 'expected':True}, # Please provide either a -kernel or -bios argument
{'machine':'leon3_generic', 'expected':True}, # Can't read bios image (null)
# devices that don't work out of the box because they require extra options to "-device DEV":
# DEVICE | ERROR MESSAGE
{'device':'.*-(i386|x86_64)-cpu', 'expected':True}, # CPU socket-id is not set
{'device':'icp', 'expected':True}, # icp_realize: required link 'xics' not found: Property '.xics' not found
{'device':'ics', 'expected':True}, # ics_base_realize: required link 'xics' not found: Property '.xics' not found
# "-device ide-cd" does work on more recent QEMU versions, so it doesn't have expected=True
{'device':'ide-cd'}, # No drive specified
{'device':'ide-drive', 'expected':True}, # No drive specified
{'device':'ide-hd', 'expected':True}, # No drive specified
{'device':'ipmi-bmc-extern', 'expected':True}, # IPMI external bmc requires chardev attribute
{'device':'isa-debugcon', 'expected':True}, # Can't create serial device, empty char device
{'device':'isa-ipmi-bt', 'expected':True}, # IPMI device requires a bmc attribute to be set
{'device':'isa-ipmi-kcs', 'expected':True}, # IPMI device requires a bmc attribute to be set
{'device':'isa-parallel', 'expected':True}, # Can't create serial device, empty char device
{'device':'ivshmem-doorbell', 'expected':True}, # You must specify a 'chardev'
{'device':'ivshmem-plain', 'expected':True}, # You must specify a 'memdev'
{'device':'loader', 'expected':True}, # please include valid arguments
{'device':'nand', 'expected':True}, # Unsupported NAND block size 0x1
{'device':'nvdimm', 'expected':True}, # 'memdev' property is not set
{'device':'nvme', 'expected':True}, # Device initialization failed
{'device':'pc-dimm', 'expected':True}, # 'memdev' property is not set
{'device':'pci-bridge', 'expected':True}, # Bridge chassis not specified. Each bridge is required to be assigned a unique chassis id > 0.
{'device':'pci-bridge-seat', 'expected':True}, # Bridge chassis not specified. Each bridge is required to be assigned a unique chassis id > 0.
{'device':'pxb', 'expected':True}, # Bridge chassis not specified. Each bridge is required to be assigned a unique chassis id > 0.
{'device':'scsi-block', 'expected':True}, # drive property not set
{'device':'scsi-disk', 'expected':True}, # drive property not set
{'device':'scsi-generic', 'expected':True}, # drive property not set
{'device':'scsi-hd', 'expected':True}, # drive property not set
{'device':'spapr-pci-host-bridge', 'expected':True}, # BUID not specified for PHB
{'device':'spapr-rng', 'expected':True}, # spapr-rng needs an RNG backend!
{'device':'spapr-vty', 'expected':True}, # chardev property not set
{'device':'tpm-tis', 'expected':True}, # tpm_tis: backend driver with id (null) could not be found
{'device':'unimplemented-device', 'expected':True}, # property 'size' not specified or zero
{'device':'usb-braille', 'expected':True}, # Property chardev is required
{'device':'usb-mtp', 'expected':True}, # rootdir property must be configured
{'device':'usb-redir', 'expected':True}, # Parameter 'chardev' is missing
{'device':'usb-serial', 'expected':True}, # Property chardev is required
{'device':'usb-storage', 'expected':True}, # drive property not set
{'device':'vfio-amd-xgbe', 'expected':True}, # -device vfio-amd-xgbe: vfio error: wrong host device name
{'device':'vfio-calxeda-xgmac', 'expected':True}, # -device vfio-calxeda-xgmac: vfio error: wrong host device name
{'device':'vfio-pci', 'expected':True}, # No provided host device
{'device':'vfio-pci-igd-lpc-bridge', 'expected':True}, # VFIO dummy ISA/LPC bridge must have address 1f.0
{'device':'vhost-scsi.*', 'expected':True}, # vhost-scsi: missing wwpn
{'device':'vhost-vsock-device', 'expected':True}, # guest-cid property must be greater than 2
{'device':'vhost-vsock-pci', 'expected':True}, # guest-cid property must be greater than 2
{'device':'virtio-9p-ccw', 'expected':True}, # 9pfs device couldn't find fsdev with the id = NULL
{'device':'virtio-9p-device', 'expected':True}, # 9pfs device couldn't find fsdev with the id = NULL
{'device':'virtio-9p-pci', 'expected':True}, # 9pfs device couldn't find fsdev with the id = NULL
{'device':'virtio-blk-ccw', 'expected':True}, # drive property not set
{'device':'virtio-blk-device', 'expected':True}, # drive property not set
{'device':'virtio-blk-device', 'expected':True}, # drive property not set
{'device':'virtio-blk-pci', 'expected':True}, # drive property not set
{'device':'virtio-crypto-ccw', 'expected':True}, # 'cryptodev' parameter expects a valid object
{'device':'virtio-crypto-device', 'expected':True}, # 'cryptodev' parameter expects a valid object
{'device':'virtio-crypto-pci', 'expected':True}, # 'cryptodev' parameter expects a valid object
{'device':'virtio-input-host-device', 'expected':True}, # evdev property is required
{'device':'virtio-input-host-pci', 'expected':True}, # evdev property is required
{'device':'xen-pvdevice', 'expected':True}, # Device ID invalid, it must always be supplied
{'device':'vhost-vsock-ccw', 'expected':True}, # guest-cid property must be greater than 2
{'device':'zpci', 'expected':True}, # target must be defined
{'device':'pnv-(occ|icp|lpc)', 'expected':True}, # required link 'xics' not found: Property '.xics' not found
{'device':'powernv-cpu-.*', 'expected':True}, # pnv_core_realize: required link 'xics' not found: Property '.xics' not found
# ioapic devices are already created by pc and will fail:
{'machine':'q35|pc.*', 'device':'kvm-ioapic', 'expected':True}, # Only 1 ioapics allowed
{'machine':'q35|pc.*', 'device':'ioapic', 'expected':True}, # Only 1 ioapics allowed
# "spapr-cpu-core needs a pseries machine"
{'machine':'(?!pseries).*', 'device':'.*-spapr-cpu-core', 'expected':True},
# KVM-specific devices shouldn't be tried without accel=kvm:
{'accel':'(?!kvm).*', 'device':'kvmclock', 'expected':True},
# xen-specific machines and devices:
{'accel':'(?!xen).*', 'machine':'xen.*', 'expected':True},
{'accel':'(?!xen).*', 'device':'xen-.*', 'expected':True},
# this fails on some machine-types, but not all, so they don't have expected=True:
{'device':'vmgenid'}, # vmgenid requires DMA write support in fw_cfg, which this machine type does not provide
# Silence INFO messages for errors that are common on multiple
# devices/machines:
{'log':r"No '[\w-]+' bus found for device '[\w-]+'"},
{'log':r"images* must be given with the 'pflash' parameter"},
{'log':r"(Guest|ROM|Flash|Kernel) image must be specified"},
{'log':r"[cC]ould not load [\w ]+ (BIOS|bios) '[\w-]+\.bin'"},
{'log':r"Couldn't find rom image '[\w-]+\.bin'"},
{'log':r"speed mismatch trying to attach usb device"},
{'log':r"Can't create a second ISA bus"},
{'log':r"duplicate fw_cfg file name"},
# sysbus-related error messages: most machines reject most dynamic sysbus devices:
{'log':r"Option '-device [\w.,-]+' cannot be handled by this machine"},
{'log':r"Device [\w.,-]+ is not supported by this machine yet"},
{'log':r"Device [\w.,-]+ can not be dynamically instantiated"},
{'log':r"Platform Bus: Can not fit MMIO region of size "},
# other more specific errors we will ignore:
{'device':'.*-spapr-cpu-core', 'log':r"CPU core type should be"},
{'log':r"MSI(-X)? is not supported by interrupt controller"},
{'log':r"pxb-pcie? devices cannot reside on a PCIe? bus"},
{'log':r"Ignoring smp_cpus value"},
{'log':r"sd_init failed: Drive 'sd0' is already in use because it has been automatically connected to another device"},
{'log':r"This CPU requires a smaller page size than the system is using"},
{'log':r"MSI-X support is mandatory in the S390 architecture"},
{'log':r"rom check and register reset failed"},
{'log':r"Unable to initialize GIC, CPUState for CPU#0 not valid"},
{'log':r"Multiple VT220 operator consoles are not supported"},
{'log':r"core 0 already populated"},
{'log':r"could not find stage1 bootloader"},
# other exitcode=1 failures not listed above will just generate INFO messages:
{'exitcode':1, 'loglevel':logging.INFO},
# everything else (including SIGABRT and SIGSEGV) will be a fatal error:
{'exitcode':None, 'fatal':True, 'loglevel':logging.FATAL},
]
def whitelistTestCaseMatch(wl, t):
"""Check if a test case specification can match a whitelist entry
This only checks if a whitelist entry is a candidate match
for a given test case, it won't check if the test case
results/output match the entry. See whitelistResultMatch().
"""
return (('machine' not in wl or
'machine' not in t or
re.match(wl['machine'] + '$', t['machine'])) and
('accel' not in wl or
'accel' not in t or
re.match(wl['accel'] + '$', t['accel'])) and
('device' not in wl or
'device' not in t or
re.match(wl['device'] + '$', t['device'])))
def whitelistCandidates(t):
"""Generate the list of candidates that can match a test case"""
for i, wl in enumerate(ERROR_WHITELIST):
if whitelistTestCaseMatch(wl, t):
yield (i, wl)
def findExpectedResult(t):
"""Check if there's an expected=True whitelist entry for a test case
Returns (i, wl) tuple, where i is the index in
ERROR_WHITELIST and wl is the whitelist entry itself.
"""
for i, wl in whitelistCandidates(t):
if wl.get('expected'):
return (i, wl)
def whitelistResultMatch(wl, r):
"""Check if test case results/output match a whitelist entry
It is valid to call this function only if
whitelistTestCaseMatch() is True for the entry (e.g. on
entries returned by whitelistCandidates())
"""
assert whitelistTestCaseMatch(wl, r['testcase'])
return ((wl.get('exitcode', 1) is None or
r['exitcode'] == wl.get('exitcode', 1)) and
('log' not in wl or
re.search(wl['log'], r['log'], re.MULTILINE)))
def checkResultWhitelist(r):
"""Look up whitelist entry for a given test case result
Returns (i, wl) tuple, where i is the index in
ERROR_WHITELIST and wl is the whitelist entry itself.
"""
for i, wl in whitelistCandidates(r['testcase']):
if whitelistResultMatch(wl, r):
return i, wl
raise Exception("this should never happen")
def qemuOptsEscape(s):
"""Escape option value QemuOpts"""
return s.replace(",", ",,")
def formatTestCase(t):
"""Format test case info as "key=value key=value" for prettier logging output"""
return ' '.join('%s=%s' % (k, v) for k, v in t.items())
def qomListTypeNames(vm, **kwargs):
"""Run qom-list-types QMP command, return type names"""
types = vm.command('qom-list-types', **kwargs)
return [t['name'] for t in types]
def infoQDM(vm):
"""Parse 'info qdm' output"""
args = {'command-line': 'info qdm'}
devhelp = vm.command('human-monitor-command', **args)
for l in devhelp.split('\n'):
l = l.strip()
if l == '' or l.endswith(':'):
continue
d = {'name': re.search(r'name "([^"]+)"', l).group(1),
'no-user': (re.search(', no-user', l) is not None)}
yield d
class QemuBinaryInfo(object):
def __init__(self, binary, devtype):
if devtype is None:
devtype = 'device'
self.binary = binary
self._machine_info = {}
dbg("devtype: %r", devtype)
args = ['-S', '-machine', 'none,accel=kvm:tcg']
dbg("querying info for QEMU binary: %s", binary)
vm = QEMUMachine(binary=binary, args=args)
vm.launch()
try:
self.alldevs = set(qomListTypeNames(vm, implements=devtype, abstract=False))
# there's no way to query DeviceClass::user_creatable using QMP,
# so use 'info qdm':
self.no_user_devs = set([d['name'] for d in infoQDM(vm, ) if d['no-user']])
self.machines = list(m['name'] for m in vm.command('query-machines'))
self.user_devs = self.alldevs.difference(self.no_user_devs)
self.kvm_available = vm.command('query-kvm')['enabled']
finally:
vm.shutdown()
def machineInfo(self, machine):
"""Query for information on a specific machine-type
Results are cached internally, in case the same machine-
type is queried multiple times.
"""
if machine in self._machine_info:
return self._machine_info[machine]
mi = {}
args = ['-S', '-machine', '%s' % (machine)]
dbg("querying machine info for binary=%s machine=%s", self.binary, machine)
vm = QEMUMachine(binary=self.binary, args=args)
try:
vm.launch()
mi['runnable'] = True
except KeyboardInterrupt:
raise
except:
dbg("exception trying to run binary=%s machine=%s", self.binary, machine, exc_info=sys.exc_info())
dbg("log: %r", vm.get_log())
mi['runnable'] = False
vm.shutdown()
self._machine_info[machine] = mi
return mi
BINARY_INFO = {}
def getBinaryInfo(args, binary):
if binary not in BINARY_INFO:
BINARY_INFO[binary] = QemuBinaryInfo(binary, args.devtype)
return BINARY_INFO[binary]
def checkOneCase(args, testcase):
"""Check one specific case
Returns a dictionary containing failure information on error,
or None on success
"""
binary = testcase['binary']
accel = testcase['accel']
machine = testcase['machine']
device = testcase['device']
dbg("will test: %r", testcase)
args = ['-S', '-machine', '%s,accel=%s' % (machine, accel),
'-device', qemuOptsEscape(device)]
cmdline = ' '.join([binary] + args)
dbg("will launch QEMU: %s", cmdline)
vm = QEMUMachine(binary=binary, args=args)
exc_traceback = None
try:
vm.launch()
except KeyboardInterrupt:
raise
except:
exc_traceback = traceback.format_exc()
dbg("Exception while running test case")
finally:
vm.shutdown()
ec = vm.exitcode()
log = vm.get_log()
if exc_traceback is not None or ec != 0:
return {'exc_traceback':exc_traceback,
'exitcode':ec,
'log':log,
'testcase':testcase,
'cmdline':cmdline}
def binariesToTest(args, testcase):
if args.qemu:
r = args.qemu
else:
r = [f.path for f in os.scandir('.')
if f.name.startswith('qemu-system-') and
f.is_file() and os.access(f, os.X_OK)]
return r
def accelsToTest(args, testcase):
if getBinaryInfo(args, testcase['binary']).kvm_available:
yield 'kvm'
yield 'tcg'
def machinesToTest(args, testcase):
return getBinaryInfo(args, testcase['binary']).machines
def devicesToTest(args, testcase):
return getBinaryInfo(args, testcase['binary']).user_devs
TESTCASE_VARIABLES = [
('binary', binariesToTest),
('accel', accelsToTest),
('machine', machinesToTest),
('device', devicesToTest),
]
def genCases1(args, testcases, var, fn):
"""Generate new testcases for one variable
If an existing item already has a variable set, don't
generate new items and just return it directly. This
allows the "-t" command-line option to be used to choose
a specific test case.
"""
for testcase in testcases:
if var in testcase:
yield testcase.copy()
else:
for i in fn(args, testcase):
t = testcase.copy()
t[var] = i
yield t
def genCases(args, testcase):
"""Generate test cases for all variables
"""
cases = [testcase.copy()]
for var, fn in TESTCASE_VARIABLES:
dbg("var: %r, fn: %r", var, fn)
cases = genCases1(args, cases, var, fn)
return cases
def casesToTest(args, testcase):
cases = genCases(args, testcase)
if args.random:
cases = list(cases)
cases = random.sample(cases, min(args.random, len(cases)))
if args.debug:
cases = list(cases)
dbg("%d test cases to test", len(cases))
if args.shuffle:
cases = list(cases)
random.shuffle(cases)
return cases
def logFailure(f, level):
t = f['testcase']
logger.log(level, "failed: %s", formatTestCase(t))
logger.log(level, "cmdline: %s", f['cmdline'])
for l in f['log'].strip().split('\n'):
logger.log(level, "log: %s", l)
logger.log(level, "exit code: %r", f['exitcode'])
if f['exc_traceback']:
logger.log(level, "exception:")
for l in f['exc_traceback'].split('\n'):
logger.log(level, " %s", l.rstrip('\n'))
def main():
parser = argparse.ArgumentParser(description="QEMU -device crash test")
parser.add_argument('-t', metavar='KEY=VALUE', nargs='*',
help="Limit test cases to KEY=VALUE",
action='append', dest='testcases', default=[])
parser.add_argument('-d', '--debug', action='store_true',
help='debug output')
parser.add_argument('-v', '--verbose', action='store_true', default=True,
help='verbose output')
parser.add_argument('-q', '--quiet', dest='verbose', action='store_false',
help='non-verbose output')
parser.add_argument('-r', '--random', type=int, metavar='COUNT',
help='run a random sample of COUNT test cases',
default=0)
parser.add_argument('--shuffle', action='store_true',
help='Run test cases in random order')
parser.add_argument('--dry-run', action='store_true',
help="Don't run any tests, just generate list")
parser.add_argument('-D', '--devtype', metavar='TYPE',
help="Test only device types that implement TYPE")
parser.add_argument('-Q', '--quick', action='store_true', default=True,
help="Quick mode: skip test cases that are expected to fail")
parser.add_argument('-F', '--full', action='store_false', dest='quick',
help="Full mode: test cases that are expected to fail")
parser.add_argument('--strict', action='store_true', dest='strict',
help="Treat all warnings as fatal")
parser.add_argument('qemu', nargs='*', metavar='QEMU',
help='QEMU binary to run')
args = parser.parse_args()
if args.debug:
lvl = logging.DEBUG
elif args.verbose:
lvl = logging.INFO
else:
lvl = logging.WARN
logging.basicConfig(stream=sys.stdout, level=lvl, format='%(levelname)s: %(message)s')
fatal_failures = []
wl_stats = {}
skipped = 0
total = 0
tc = {}
dbg("testcases: %r", args.testcases)
if args.testcases:
for t in chain(*args.testcases):
for kv in t.split():
k, v = kv.split('=', 1)
tc[k] = v
if len(binariesToTest(args, tc)) == 0:
print("No QEMU binary found", file=sys.stderr)
parser.print_usage(sys.stderr)
return 1
for t in casesToTest(args, tc):
logger.info("running test case: %s", formatTestCase(t))
total += 1
expected_match = findExpectedResult(t)
if (args.quick and
(expected_match or
not getBinaryInfo(args, t['binary']).machineInfo(t['machine'])['runnable'])):
dbg("skipped: %s", formatTestCase(t))
skipped += 1
continue
if args.dry_run:
continue
try:
f = checkOneCase(args, t)
except KeyboardInterrupt:
break
if f:
i, wl = checkResultWhitelist(f)
dbg("testcase: %r, whitelist match: %r", t, wl)
wl_stats.setdefault(i, []).append(f)
level = wl.get('loglevel', logging.DEBUG)
logFailure(f, level)
if wl.get('fatal') or (args.strict and level >= logging.WARN):
fatal_failures.append(f)
else:
dbg("success: %s", formatTestCase(t))
if expected_match:
logger.warn("Didn't fail as expected: %s", formatTestCase(t))
logger.info("Total: %d test cases", total)
if skipped:
logger.info("Skipped %d test cases", skipped)
if args.debug:
stats = sorted([(len(wl_stats.get(i, [])), wl) for i, wl in
enumerate(ERROR_WHITELIST)], key=lambda x: x[0])
for count, wl in stats:
dbg("whitelist entry stats: %d: %r", count, wl)
if fatal_failures:
for f in fatal_failures:
t = f['testcase']
logger.error("Fatal failure: %s", formatTestCase(t))
logger.error("Fatal failures on some machine/device combinations")
return 1
if __name__ == '__main__':
sys.exit(main())
