[Linux-kernel-mentees] [RFC 1/3] kunit: tool: Add support root filesystem in kunit-tool
Vitor Massaru Iha
vitor at massaru.org
Wed Jul 15 03:11:18 UTC 2020
This makes it possible to use KUnit tests as modules.
And with that the tests can run in userspace.
The filesystem was created using debootstrap:
sudo debootstrap buster buster_rootfs
And change the owner of the root filesystem files
for your user:
sudo chown -R $USER:$USER buster_rootfs
For the kunit-tool to correctly capture the test results,
uml_utilities must be installed on the host to halt uml.
Signed-off-by: Vitor Massaru Iha <vitor at massaru.org>
---
tools/testing/kunit/kunit.py | 37 ++++++++--
tools/testing/kunit/kunit_kernel.py | 105 ++++++++++++++++++++++++----
2 files changed, 121 insertions(+), 21 deletions(-)
diff --git a/tools/testing/kunit/kunit.py b/tools/testing/kunit/kunit.py
index 787b6d4ad716..6d8ba0215b90 100755
--- a/tools/testing/kunit/kunit.py
+++ b/tools/testing/kunit/kunit.py
@@ -23,16 +23,16 @@ import kunit_parser
KunitResult = namedtuple('KunitResult', ['status','result','elapsed_time'])
KunitConfigRequest = namedtuple('KunitConfigRequest',
- ['build_dir', 'make_options'])
+ ['build_dir', 'uml_root_dir', 'make_options'])
KunitBuildRequest = namedtuple('KunitBuildRequest',
- ['jobs', 'build_dir', 'alltests',
+ ['jobs', 'build_dir', 'uml_root_dir', 'alltests',
'make_options'])
KunitExecRequest = namedtuple('KunitExecRequest',
- ['timeout', 'build_dir', 'alltests'])
+ ['timeout', 'build_dir', 'uml_root_dir', 'alltests'])
KunitParseRequest = namedtuple('KunitParseRequest',
['raw_output', 'input_data'])
KunitRequest = namedtuple('KunitRequest', ['raw_output','timeout', 'jobs',
- 'build_dir', 'alltests',
+ 'build_dir', 'uml_root_dir', 'alltests',
'make_options'])
KernelDirectoryPath = sys.argv[0].split('tools/testing/kunit/')[0]
@@ -47,7 +47,6 @@ def create_default_kunitconfig():
if not os.path.exists(kunit_kernel.kunitconfig_path):
shutil.copyfile('arch/um/configs/kunit_defconfig',
kunit_kernel.kunitconfig_path)
-
def get_kernel_root_path():
parts = sys.argv[0] if not __file__ else __file__
parts = os.path.realpath(parts).split('tools/testing/kunit')
@@ -58,10 +57,22 @@ def get_kernel_root_path():
def config_tests(linux: kunit_kernel.LinuxSourceTree,
request: KunitConfigRequest) -> KunitResult:
kunit_parser.print_with_timestamp('Configuring KUnit Kernel ...')
+ defconfig = False
config_start = time.time()
create_default_kunitconfig()
- success = linux.build_reconfig(request.build_dir, request.make_options)
+
+ if request.uml_root_dir != None:
+ if os.path.exists(request.uml_root_dir):
+ kunit_kernel.uml_root_path = os.path.abspath(request.uml_root_dir)
+ defconfig = True
+ else:
+ config_end = time.time()
+ return KunitResult(KunitStatus.CONFIG_FAILURE,
+ 'could not configure kernel',
+ config_end - config_start)
+
+ success = linux.build_reconfig(request.build_dir, defconfig, request.make_options)
config_end = time.time()
if not success:
return KunitResult(KunitStatus.CONFIG_FAILURE,
@@ -79,6 +90,7 @@ def build_tests(linux: kunit_kernel.LinuxSourceTree,
success = linux.build_um_kernel(request.alltests,
request.jobs,
request.build_dir,
+ request.uml_root_dir,
request.make_options)
build_end = time.time()
if not success:
@@ -97,7 +109,7 @@ def exec_tests(linux: kunit_kernel.LinuxSourceTree,
test_start = time.time()
result = linux.run_kernel(
timeout=None if request.alltests else request.timeout,
- build_dir=request.build_dir)
+ build_dir=request.build_dir, uml_root_dir=request.uml_root_dir)
test_end = time.time()
@@ -130,12 +142,14 @@ def run_tests(linux: kunit_kernel.LinuxSourceTree,
run_start = time.time()
config_request = KunitConfigRequest(request.build_dir,
+ request.uml_root_dir,
request.make_options)
config_result = config_tests(linux, config_request)
if config_result.status != KunitStatus.SUCCESS:
return config_result
build_request = KunitBuildRequest(request.jobs, request.build_dir,
+ request.uml_root_dir,
request.alltests,
request.make_options)
build_result = build_tests(linux, build_request)
@@ -143,6 +157,7 @@ def run_tests(linux: kunit_kernel.LinuxSourceTree,
return build_result
exec_request = KunitExecRequest(request.timeout, request.build_dir,
+ request.uml_root_dir,
request.alltests)
exec_result = exec_tests(linux, exec_request)
if exec_result.status != KunitStatus.SUCCESS:
@@ -168,6 +183,10 @@ def add_common_opts(parser):
help='As in the make command, it specifies the build '
'directory.',
type=str, default='.kunit', metavar='build_dir')
+ parser.add_argument('--uml_root_dir',
+ help='To load modules, a root filesystem is '
+ 'required to install and load these modules.',
+ type=str, default=None, metavar='uml_root_dir')
parser.add_argument('--make_options',
help='X=Y make option, can be repeated.',
action='append')
@@ -252,6 +271,7 @@ def main(argv, linux=None):
cli_args.timeout,
cli_args.jobs,
cli_args.build_dir,
+ cli_args.uml_root_dir,
cli_args.alltests,
cli_args.make_options)
result = run_tests(linux, request)
@@ -272,6 +292,7 @@ def main(argv, linux=None):
linux = kunit_kernel.LinuxSourceTree()
request = KunitConfigRequest(cli_args.build_dir,
+ cli_args.uml_root_dir,
cli_args.make_options)
result = config_tests(linux, request)
kunit_parser.print_with_timestamp((
@@ -295,6 +316,7 @@ def main(argv, linux=None):
request = KunitBuildRequest(cli_args.jobs,
cli_args.build_dir,
+ cli_args.uml_root_dir,
cli_args.alltests,
cli_args.make_options)
result = build_tests(linux, request)
@@ -319,6 +341,7 @@ def main(argv, linux=None):
exec_request = KunitExecRequest(cli_args.timeout,
cli_args.build_dir,
+ cli_args.uml_root_dir,
cli_args.alltests)
exec_result = exec_tests(linux, exec_request)
parse_request = KunitParseRequest(cli_args.raw_output,
diff --git a/tools/testing/kunit/kunit_kernel.py b/tools/testing/kunit/kunit_kernel.py
index 63dbda2d029f..d712f4619eaa 100644
--- a/tools/testing/kunit/kunit_kernel.py
+++ b/tools/testing/kunit/kunit_kernel.py
@@ -11,6 +11,7 @@ import logging
import subprocess
import os
import signal
+import time
from contextlib import ExitStack
@@ -19,7 +20,59 @@ import kunit_parser
KCONFIG_PATH = '.config'
kunitconfig_path = '.kunitconfig'
+X86_64_DEFCONFIG_PATH = 'arch/um/configs/x86_64_defconfig'
BROKEN_ALLCONFIG_PATH = 'tools/testing/kunit/configs/broken_on_uml.config'
+uml_root_path = None
+
+make_cmd = {
+ 'make': {
+ 'command': ['make', 'ARCH=um'],
+ 'msg_error': 'Could not call execute make: ',
+ },
+ 'make_modules': {
+ 'command': ['make', 'modules', 'ARCH=um'],
+ 'msg_error': 'Could not call execute make modules: ',
+ },
+ 'make_modules_install': {
+ 'command': ['make', 'modules_install', 'ARCH=um'],
+ 'msg_error': 'Could not call execute make modules_install: ',
+ }
+}
+
+def halt_uml():
+ try:
+ subprocess.call(['uml_mconsole', 'kunitid', 'halt'])
+ except OSError as e:
+ raise ConfigError('Could not call uml_mconsole ' + e)
+ except subprocess.CalledProcessError as e:
+ raise ConfigError(e.output)
+
+
+def enable_uml_modules_on_boot(output_command):
+ uml_modules_path = None
+ found_kernel_version = False
+ modules = []
+ for i in output_command.decode('utf-8').split():
+ if found_kernel_version:
+ kernel_version = i
+ uml_modules_path = os.path.join(uml_root_path,
+ 'lib/modules/', kernel_version, 'kernel/lib/')
+ break
+ if 'DEPMOD' in i:
+ found_kernel_version = True
+
+ try:
+ if os.path.exists(uml_modules_path):
+ modules = subprocess.check_output(['ls',
+ uml_modules_path]).decode('utf-8').split()
+ except OSError as e:
+ raise ConfigError('Could not list directory ' + e)
+ except subprocess.CalledProcessError as e:
+ raise ConfigError(e.output)
+
+ with open(os.path.join(uml_root_path, 'etc/modules'), 'w') as f:
+ for i in modules:
+ f.write(i.replace('.ko', ''))
class ConfigError(Exception):
"""Represents an error trying to configure the Linux kernel."""
@@ -70,20 +123,27 @@ class LinuxSourceTreeOperations(object):
kunit_parser.print_with_timestamp(
'Starting Kernel with all configs takes a few minutes...')
- def make(self, jobs, build_dir, make_options):
- command = ['make', 'ARCH=um', '--jobs=' + str(jobs)]
+ def make(self, cmd, jobs, build_dir, make_options):
+ command = make_cmd[cmd]['command'] + ['--jobs=' + str(jobs)]
+
if make_options:
command.extend(make_options)
if build_dir:
command += ['O=' + build_dir]
+
+ if cmd == 'make_modules_install':
+ command += ['INSTALL_MOD_PATH=' + uml_root_path]
+
try:
- subprocess.check_output(command)
+ output = subprocess.check_output(command)
+ if cmd == 'make_modules_install':
+ enable_uml_modules_on_boot(output)
except OSError as e:
- raise BuildError('Could not call execute make: ' + e)
+ raise BuildError(make_cmd[cmd][msg_error] + e)
except subprocess.CalledProcessError as e:
raise BuildError(e.output)
- def linux_bin(self, params, timeout, build_dir, outfile):
+ def linux_bin(self, params, timeout, build_dir, uml_root_dir, outfile):
"""Runs the Linux UML binary. Must be named 'linux'."""
linux_bin = './linux'
if build_dir:
@@ -92,7 +152,11 @@ class LinuxSourceTreeOperations(object):
process = subprocess.Popen([linux_bin] + params,
stdout=output,
stderr=subprocess.STDOUT)
- process.wait(timeout)
+ if uml_root_dir:
+ time.sleep(timeout)
+ halt_uml()
+ else:
+ process.wait(timeout)
def get_kconfig_path(build_dir):
@@ -132,11 +196,16 @@ class LinuxSourceTree(object):
return False
return True
- def build_config(self, build_dir, make_options):
+ def build_config(self, build_dir, defconfig, make_options):
kconfig_path = get_kconfig_path(build_dir)
if build_dir and not os.path.exists(build_dir):
os.mkdir(build_dir)
self._kconfig.write_to_file(kconfig_path)
+
+ if defconfig:
+ with open(kconfig_path, 'a') as fw:
+ with open(X86_64_DEFCONFIG_PATH, 'r') as fr:
+ fw.write(fr.read())
try:
self._ops.make_olddefconfig(build_dir, make_options)
except ConfigError as e:
@@ -144,7 +213,7 @@ class LinuxSourceTree(object):
return False
return self.validate_config(build_dir)
- def build_reconfig(self, build_dir, make_options):
+ def build_reconfig(self, build_dir, defconfig, make_options):
"""Creates a new .config if it is not a subset of the .kunitconfig."""
kconfig_path = get_kconfig_path(build_dir)
if os.path.exists(kconfig_path):
@@ -153,28 +222,36 @@ class LinuxSourceTree(object):
if not self._kconfig.is_subset_of(existing_kconfig):
print('Regenerating .config ...')
os.remove(kconfig_path)
- return self.build_config(build_dir, make_options)
+ return self.build_config(build_dir, defconfig, make_options)
else:
return True
else:
print('Generating .config ...')
- return self.build_config(build_dir, make_options)
+ return self.build_config(build_dir, defconfig, make_options)
- def build_um_kernel(self, alltests, jobs, build_dir, make_options):
+ def build_um_kernel(self, alltests, jobs, build_dir, uml_root_dir, make_options):
if alltests:
self._ops.make_allyesconfig()
try:
self._ops.make_olddefconfig(build_dir, make_options)
- self._ops.make(jobs, build_dir, make_options)
+ self._ops.make('make', jobs, build_dir, make_options)
+ if uml_root_dir:
+ self._ops.make('make_modules', jobs, build_dir,
+ make_options)
+ self._ops.make('make_modules_install', jobs,
+ build_dir, make_options)
except (ConfigError, BuildError) as e:
logging.error(e)
return False
return self.validate_config(build_dir)
- def run_kernel(self, args=[], build_dir='', timeout=None):
+ def run_kernel(self, args=[], build_dir='', uml_root_dir=None, timeout=None):
args.extend(['mem=1G'])
+ if uml_root_dir:
+ args.extend(['root=/dev/root', 'rootfstype=hostfs',
+ 'rootflags=' + uml_root_path, 'umid=kunitid'])
outfile = 'test.log'
- self._ops.linux_bin(args, timeout, build_dir, outfile)
+ self._ops.linux_bin(args, timeout, build_dir, uml_root_dir, outfile)
subprocess.call(['stty', 'sane'])
with open(outfile, 'r') as file:
for line in file:
--
2.26.2
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