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#!/usr/bin/python3
import sys
import glob
import os
import pathlib
import re
from debian_linux.abi import Symbols
from debian_linux.config import ConfigCoreDump
from debian_linux.debian import Changelog, VersionLinux
from debian_linux.kconfig import KconfigFile
class CheckAbi(object):
class SymbolInfo(object):
def __init__(self, symbol, symbol_ref=None):
self.symbol = symbol
self.symbol_ref = symbol_ref or symbol
@property
def module(self):
return self.symbol.module
@property
def name(self):
return self.symbol.name
def write(self, out, ignored):
info = []
if ignored:
info.append("ignored")
for name in ('module', 'version', 'export'):
data = getattr(self.symbol, name)
data_ref = getattr(self.symbol_ref, name)
if data != data_ref:
info.append("%s: %s -> %s" % (name, data_ref, data))
else:
info.append("%s: %s" % (name, data))
out.write("%-48s %s\n" % (self.symbol.name, ", ".join(info)))
def __init__(self, config, dir, arch, featureset, flavour):
self.config = config
self.arch, self.featureset, self.flavour = arch, featureset, flavour
self.filename_new = "%s/Module.symvers" % dir
try:
version_abi = (self.config[('version',)]['abiname_base'] + '-'
+ self.config['abi', arch]['abiname'])
except KeyError:
version_abi = self.config[('version',)]['abiname']
self.filename_ref = ("debian/abi/%s/%s_%s_%s" %
(version_abi, arch, featureset, flavour))
def __call__(self, out):
ret = 0
new = Symbols(open(self.filename_new))
unversioned = [name for name in new
if new[name].version == '0x00000000']
if unversioned:
out.write("ABI is not completely versioned! "
"Refusing to continue.\n")
out.write("\nUnversioned symbols:\n")
for name in sorted(unversioned):
self.SymbolInfo(new[name]).write(out, False)
ret = 1
try:
ref = Symbols(open(self.filename_ref))
except IOError:
out.write("Can't read ABI reference. ABI not checked!\n")
return ret
symbols, add, change, remove = self._cmp(ref, new)
ignore = self._ignore(symbols)
add_effective = add - ignore
change_effective = change - ignore
remove_effective = remove - ignore
if change_effective or remove_effective:
out.write("ABI has changed! Refusing to continue.\n")
ret = 1
elif change or remove:
out.write("ABI has changed but all changes have been ignored. "
"Continuing.\n")
elif add_effective:
out.write("New symbols have been added. Continuing.\n")
elif add:
out.write("New symbols have been added but have been ignored. "
"Continuing.\n")
else:
out.write("No ABI changes.\n")
if add:
out.write("\nAdded symbols:\n")
for name in sorted(add):
symbols[name].write(out, name in ignore)
if change:
out.write("\nChanged symbols:\n")
for name in sorted(change):
symbols[name].write(out, name in ignore)
if remove:
out.write("\nRemoved symbols:\n")
for name in sorted(remove):
symbols[name].write(out, name in ignore)
return ret
def _cmp(self, ref, new):
ref_names = set(ref.keys())
new_names = set(new.keys())
add = set()
change = set()
remove = set()
symbols = {}
for name in new_names - ref_names:
add.add(name)
symbols[name] = self.SymbolInfo(new[name])
for name in ref_names.intersection(new_names):
s_ref = ref[name]
s_new = new[name]
if s_ref != s_new:
change.add(name)
symbols[name] = self.SymbolInfo(s_new, s_ref)
for name in ref_names - new_names:
remove.add(name)
symbols[name] = self.SymbolInfo(ref[name])
return symbols, add, change, remove
def _ignore_pattern(self, pattern):
ret = []
for i in re.split(r'(\*\*?)', pattern):
if i == '*':
ret.append(r'[^/]*')
elif i == '**':
ret.append(r'.*')
elif i:
ret.append(re.escape(i))
return re.compile('^' + ''.join(ret) + '$')
def _ignore(self, symbols):
# TODO: let config merge this lists
configs = []
configs.append(self.config.get(('abi', self.arch, self.featureset,
self.flavour), {}))
configs.append(self.config.get(('abi', self.arch, None, self.flavour),
{}))
configs.append(self.config.get(('abi', self.arch, self.featureset),
{}))
configs.append(self.config.get(('abi', self.arch), {}))
configs.append(self.config.get(('abi', None, self.featureset), {}))
configs.append(self.config.get(('abi',), {}))
ignores = set()
for config in configs:
ignores.update(config.get('ignore-changes', []))
filtered = set()
for ignore in ignores:
type = 'name'
if ':' in ignore:
type, ignore = ignore.split(':')
if type in ('name', 'module'):
p = self._ignore_pattern(ignore)
for symbol in symbols.values():
if p.match(getattr(symbol, type)):
filtered.add(symbol.name)
else:
raise NotImplementedError
return filtered
class CheckImage(object):
def __init__(self, config, dir, arch, featureset, flavour):
self.dir = dir
self.arch, self.featureset, self.flavour = arch, featureset, flavour
self.changelog = Changelog(version=VersionLinux)[0]
self.config_entry_base = config.merge('base', arch, featureset,
flavour)
self.config_entry_build = config.merge('build', arch, featureset,
flavour)
self.config_entry_image = config.merge('image', arch, featureset,
flavour)
def __call__(self, out):
image = self.config_entry_build.get('image-file')
uncompressed_image = self.config_entry_build \
.get('uncompressed-image-file')
if not image:
# TODO: Bail out
return 0
image = os.path.join(self.dir, image)
if uncompressed_image:
uncompressed_image = os.path.join(self.dir, uncompressed_image)
fail = 0
fail |= self.check_size(out, image, uncompressed_image)
return fail
def check_size(self, out, image, uncompressed_image):
value = self.config_entry_image.get('check-size')
if not value:
return 0
dtb_size = 0
if self.config_entry_image.get('check-size-with-dtb'):
for dtb in glob.glob(
os.path.join(self.dir, 'arch',
self.config_entry_base['kernel-arch'],
'boot/dts/*.dtb')):
dtb_size = max(dtb_size, os.stat(dtb).st_size)
size = os.stat(image).st_size + dtb_size
# 1% overhead is desirable in order to cope with growth
# through the lifetime of a stable release. Warn if this is
# not the case.
usage = (float(size)/value) * 100.0
out.write('Image size %d/%d, using %.2f%%. ' % (size, value, usage))
if size > value:
out.write('Too large. Refusing to continue.\n')
return 1
elif usage >= 99.0:
out.write('Under 1%% space in %s. ' % self.changelog.distribution)
else:
out.write('Image fits. ')
out.write('Continuing.\n')
# Also check the uncompressed image
if uncompressed_image and \
self.config_entry_image.get('check-uncompressed-size'):
value = self.config_entry_image.get('check-uncompressed-size')
size = os.stat(uncompressed_image).st_size
usage = (float(size)/value) * 100.0
out.write('Uncompressed Image size %d/%d, using %.2f%%. ' %
(size, value, usage))
if size > value:
out.write('Too large. Refusing to continue.\n')
return 1
elif usage >= 99.0:
out.write('Uncompressed Image Under 1%% space in %s. ' %
self.changelog.distribution)
else:
out.write('Uncompressed Image fits. ')
out.write('Continuing.\n')
return 0
class CheckSecureBootConfig:
def __init__(self, config, dir, arch, *_):
self.config = config
self.dir = pathlib.Path(dir)
self.arch = arch
def __call__(self, out):
fail = 0
if self.config.merge('build', self.arch) \
.get('signed-code', False) \
and not os.getenv('DEBIAN_KERNEL_DISABLE_SIGNED'):
kconfig = KconfigFile()
with (self.dir / '.config').open() as fh:
kconfig.read(fh)
for name, value in [('EFI_STUB', True),
('LOCK_DOWN_IN_EFI_SECURE_BOOT', True),
('SYSTEM_TRUSTED_KEYS', '""')]:
if name not in kconfig:
out.write(f'Secure Boot: CONFIG_{name} is not defined\n')
fail = 1
elif kconfig[name].value != value:
out.write(f'Secure Boot: CONFIG_{name} has wrong value:'
f' {kconfig[name].value}\n')
fail = 1
if kconfig.get('MODULE_SIG_KEY').value == '"certs/signing_key.pem"':
out.write('Secure Boot: CONFIG_MODULE_SIG_KEY has default value\n')
fail = 1
return fail
class Main(object):
checks = {
'setup': [CheckSecureBootConfig],
'build': [CheckAbi, CheckImage],
}
def __init__(self, dir, arch, featureset, flavour, phase):
self.args = dir, arch, featureset, flavour
self.phase = phase
self.config = ConfigCoreDump(open("debian/config.defines.dump", "rb"))
def __call__(self):
fail = 0
for c in self.checks[self.phase]:
fail |= c(self.config, *self.args)(sys.stdout)
return fail
if __name__ == '__main__':
sys.exit(Main(*sys.argv[1:])())
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