257 lines
9.5 KiB
Python
257 lines
9.5 KiB
Python
# Copyright 2021 Attila Szollosi
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# SPDX-License-Identifier: GPL-3.0-or-later
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import glob
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import logging
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import re
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import os
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import pmb.build
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import pmb.config
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import pmb.parse
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import pmb.helpers.pmaports
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def is_set(config, option):
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"""
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Check, whether a boolean or tristate option is enabled
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either as builtin or module.
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"""
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return re.search("^CONFIG_" + option + "=[ym]$", config, re.M) is not None
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def is_set_str(config, option, string):
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"""
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Check, whether a config option contains a string as value.
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"""
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match = re.search("^CONFIG_" + option + "=\"(.*)\"$", config, re.M)
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if match:
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return string == match.group(1)
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else:
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return False
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def is_in_array(config, option, string):
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"""
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Check, whether a config option contains string as an array element
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"""
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match = re.search("^CONFIG_" + option + "=\"(.*)\"$", config, re.M)
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if match:
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values = match.group(1).split(",")
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return string in values
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else:
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return False
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def check_option(component, details, config, config_path_pretty, option,
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option_value):
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link = (f"https://wiki.postmarketos.org/wiki/kconfig#CONFIG_{option}")
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warning_no_details = (f"WARNING: {config_path_pretty} isn't"
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f" configured properly for {component}, run"
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f" 'pmbootstrap kconfig check' for details!")
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if isinstance(option_value, list):
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for string in option_value:
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if not is_in_array(config, option, string):
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if details:
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logging.info(f"WARNING: {config_path_pretty}:"
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f' CONFIG_{option} should contain "{string}".'
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f" See <{link}> for details.")
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else:
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logging.warning(warning_no_details)
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return False
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elif isinstance(option_value, str):
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if not is_set_str(config, option, option_value):
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if details:
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logging.info(f"WARNING: {config_path_pretty}: CONFIG_{option}"
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f' should be set to "{option_value}".'
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f" See <{link}> for details.")
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else:
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logging.warning(warning_no_details)
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return False
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elif option_value in [True, False]:
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if option_value != is_set(config, option):
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if details:
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should = "should" if option_value else "should *not*"
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logging.info(f"WARNING: {config_path_pretty}: CONFIG_{option}"
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f" {should} be set. See <{link}> for details.")
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else:
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logging.warning(warning_no_details)
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return False
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else:
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raise RuntimeError("kconfig check code can only handle booleans,"
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f" strings and arrays. Given value {option_value}"
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" is not supported. If you need this, please patch"
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" pmbootstrap or open an issue.")
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return True
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def check_config(config_path, config_path_pretty, config_arch, pkgver,
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anbox=False,
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apparmor=False,
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iwd=False,
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nftables=False,
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containers=False,
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zram=False,
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details=False):
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logging.debug(f"Check kconfig: {config_path}")
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with open(config_path) as handle:
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config = handle.read()
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components = {"postmarketOS": pmb.config.necessary_kconfig_options}
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if anbox:
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components["anbox"] = pmb.config.necessary_kconfig_options_anbox
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if apparmor:
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components["apparmor"] = pmb.config.necessary_kconfig_options_apparmor
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if iwd:
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components["iwd"] = pmb.config.necessary_kconfig_options_iwd
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if nftables:
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components["nftables"] = pmb.config.necessary_kconfig_options_nftables
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if containers:
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components["containers"] = \
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pmb.config.necessary_kconfig_options_containers
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if zram:
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components["zram"] = pmb.config.necessary_kconfig_options_zram
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results = [check_config_options_set(config, config_path_pretty,
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config_arch, options, component,
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pkgver, details)
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for component, options in components.items()]
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return all(results)
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def check_config_options_set(config, config_path_pretty, config_arch, options,
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component, pkgver, details=False):
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# Loop through necessary config options, and print a warning,
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# if any is missing
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ret = True
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for rules, archs_options in options.items():
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# Skip options irrelevant for the current kernel's version
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# Example rules: ">=4.0 <5.0"
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skip = False
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for rule in rules.split(" "):
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if not pmb.parse.version.check_string(pkgver, rule):
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skip = True
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break
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if skip:
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continue
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for archs, options in archs_options.items():
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if archs != "all":
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# Split and check if the device's architecture architecture has
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# special config options. If option does not contain the
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# architecture of the device kernel, then just skip the option.
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architectures = archs.split(" ")
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if config_arch not in architectures:
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continue
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for option, option_value in options.items():
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if not check_option(component, details, config,
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config_path_pretty, option, option_value):
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ret = False
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if not details:
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break # do not give too much error messages
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return ret
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def check(args, pkgname,
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force_anbox_check=False,
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force_apparmor_check=False,
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force_iwd_check=False,
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force_nftables_check=False,
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force_containers_check=False,
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force_zram_check=False,
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details=False):
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"""
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Check for necessary kernel config options in a package.
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:returns: True when the check was successful, False otherwise
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"""
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# Pkgname: allow omitting "linux-" prefix
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if pkgname.startswith("linux-"):
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flavor = pkgname.split("linux-")[1]
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else:
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flavor = pkgname
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# Read all kernel configs in the aport
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ret = True
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aport = pmb.helpers.pmaports.find(args, "linux-" + flavor)
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apkbuild = pmb.parse.apkbuild(args, aport + "/APKBUILD")
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pkgver = apkbuild["pkgver"]
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check_anbox = force_anbox_check or (
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"pmb:kconfigcheck-anbox" in apkbuild["options"])
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check_apparmor = force_apparmor_check or (
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"pmb:kconfigcheck-apparmor" in apkbuild["options"])
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check_iwd = force_iwd_check or (
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"pmb:kconfigcheck-iwd" in apkbuild["options"])
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check_nftables = force_nftables_check or (
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"pmb:kconfigcheck-nftables" in apkbuild["options"])
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check_containers = force_containers_check or (
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"pmb:kconfigcheck-containers" in apkbuild["options"])
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check_zram = force_zram_check or (
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"pmb:kconfigcheck-zram" in apkbuild["options"])
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for config_path in glob.glob(aport + "/config-*"):
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# The architecture of the config is in the name, so it just needs to be
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# extracted
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config_arch = os.path.basename(config_path).split(".")[1]
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config_path_pretty = f"linux-{flavor}/{os.path.basename(config_path)}"
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ret &= check_config(config_path, config_path_pretty, config_arch,
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pkgver,
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anbox=check_anbox,
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apparmor=check_apparmor,
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iwd=check_iwd,
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nftables=check_nftables,
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containers=check_containers,
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zram=check_zram,
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details=details)
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return ret
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def extract_arch(config_file):
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# Extract the architecture out of the config
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with open(config_file) as f:
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config = f.read()
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if is_set(config, "ARM"):
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return "armv7"
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elif is_set(config, "ARM64"):
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return "aarch64"
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elif is_set(config, "X86_32"):
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return "x86"
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elif is_set(config, "X86_64"):
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return "x86_64"
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# No match
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logging.info("WARNING: failed to extract arch from kernel config")
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return "unknown"
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def extract_version(config_file):
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# Try to extract the version string out of the comment header
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with open(config_file) as f:
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# Read the first 3 lines of the file and get the third line only
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text = [next(f) for x in range(3)][2]
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ver_match = re.match(r"# Linux/\S+ (\S+) Kernel Configuration", text)
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if ver_match:
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return ver_match.group(1)
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# No match
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logging.info("WARNING: failed to extract version from kernel config")
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return "unknown"
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def check_file(config_file, anbox=False, nftables=False,
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containers=False, zram=False, details=False):
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"""
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Check for necessary kernel config options in a kconfig file.
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:returns: True when the check was successful, False otherwise
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"""
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arch = extract_arch(config_file)
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version = extract_version(config_file)
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logging.debug(f"Check kconfig: parsed arch={arch}, version={version} from "
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"file: {config_file}")
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return check_config(config_file, config_file, arch, version,
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anbox=anbox,
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nftables=nftables,
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containers=containers,
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zram=zram,
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details=details)
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