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@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: