tools/helpers/lxc.py

   1 # Copyright 2021 Erfan Abdi
   2 # SPDX-License-Identifier: GPL-3.0-or-later
   3 import subprocess
   4 import os
   5 import re
   6 import logging
   7 import glob
   8 import shutil
   9 import time
  10 import platform
  11 import gbinder
  12 import tools.config
  13 import tools.helpers.run
  14
  15 def get_lxc_version(args):
  16     if shutil.which("lxc-info") is not None:
  17         command = ["lxc-info", "--version"]
  18         version_str = tools.helpers.run.user(args, command, output_return=True)
  19         return int(version_str[0])
  20     else:
  21         return 0
  22
  23 def add_node_entry(nodes, src, dist, mnt_type, options, check):
  24     if check and not os.path.exists(src):
  25         return False
  26     entry = "lxc.mount.entry = "
  27     entry += src + " "
  28     if dist is None:
  29         dist = src[1:]
  30     entry += dist + " "
  31     entry += mnt_type + " "
  32     entry += options
  33     nodes.append(entry)
  34     return True
  35
  36 def generate_nodes_lxc_config(args):
  37     nodes = []
  38     def make_entry(src, dist=None, mnt_type="none", options="bind,create=file,optional 0 0", check=True):
  39         return add_node_entry(nodes, src, dist, mnt_type, options, check)
  40
  41     # Necessary dev nodes
  42     make_entry("tmpfs", "dev", "tmpfs", "nosuid 0 0", False)
  43     make_entry("/dev/zero")
  44     make_entry("/dev/null")
  45     make_entry("/dev/full")
  46     make_entry("/dev/ashmem")
  47     make_entry("/dev/fuse")
  48     make_entry("/dev/ion")
  49     make_entry("/dev/tty")
  50     make_entry("/dev/char", options="bind,create=dir,optional 0 0")
  51
  52     # Graphic dev nodes
  53     make_entry("/dev/kgsl-3d0")
  54     make_entry("/dev/mali0")
  55     make_entry("/dev/pvr_sync")
  56     make_entry("/dev/pmsg0")
  57     make_entry("/dev/dxg")
  58     render, card = tools.helpers.gpu.getDriNode(args)
  59     make_entry(render, "dev/dri/renderD128")
  60     make_entry(card, "dev/dri/card0")
  61
  62     for n in glob.glob("/dev/fb*"):
  63         make_entry(n)
  64     for n in glob.glob("/dev/graphics/fb*"):
  65         make_entry(n)
  66     for n in glob.glob("/dev/video*"):
  67         make_entry(n)
  68
  69     # Binder dev nodes
  70     make_entry("/dev/" + args.BINDER_DRIVER, "dev/binder", check=False)
  71     make_entry("/dev/" + args.VNDBINDER_DRIVER, "dev/vndbinder", check=False)
  72     make_entry("/dev/" + args.HWBINDER_DRIVER, "dev/hwbinder", check=False)
  73
  74     if args.vendor_type != "MAINLINE":
  75         if not make_entry("/dev/hwbinder", "dev/host_hwbinder"):
  76             raise OSError('Binder node "hwbinder" of host not found')
  77         make_entry("/vendor", "vendor_extra", options="rbind,optional 0 0")
  78
  79     # Necessary device nodes for adb
  80     make_entry("none", "dev/pts", "devpts", "defaults,mode=644,ptmxmode=666,create=dir 0 0", False)
  81     make_entry("/dev/uhid")
  82
  83     # TUN/TAP device node for VPN
  84     make_entry("/dev/net/tun", "dev/tun")
  85
  86     # Low memory killer sys node
  87     make_entry("/sys/module/lowmemorykiller", options="bind,create=dir,optional 0 0")
  88
  89     # Mount host permissions
  90     make_entry(tools.config.defaults["host_perms"],
  91                "vendor/etc/host-permissions", options="bind,optional 0 0")
  92
  93     # Necessary sw_sync node for HWC
  94     make_entry("/dev/sw_sync")
  95     make_entry("/sys/kernel/debug", options="rbind,create=dir,optional 0 0")
  96
  97     # Vibrator
  98     make_entry("/sys/class/leds/vibrator",
  99                options="bind,create=dir,optional 0 0")
 100     make_entry("/sys/devices/virtual/timed_output/vibrator",
 101                options="bind,create=dir,optional 0 0")
 102
 103     # Media dev nodes (for Mediatek)
 104     make_entry("/dev/Vcodec")
 105     make_entry("/dev/MTK_SMI")
 106     make_entry("/dev/mdp_sync")
 107     make_entry("/dev/mtk_cmdq")
 108
 109     # WSLg
 110     make_entry("tmpfs", "mnt_extra", "tmpfs", "nodev 0 0", False)
 111     make_entry("/mnt/wslg", "mnt_extra/wslg",
 112                options="rbind,create=dir,optional 0 0")
 113
 114     # Make a tmpfs at every possible rootfs mountpoint
 115     make_entry("tmpfs", "tmp", "tmpfs", "nodev 0 0", False)
 116     make_entry("tmpfs", "var", "tmpfs", "nodev 0 0", False)
 117     make_entry("tmpfs", "run", "tmpfs", "nodev 0 0", False)
 118
 119     # NFC config
 120     make_entry("/system/etc/libnfc-nci.conf", options="bind,optional 0 0")
 121
 122     return nodes
 123
 124 LXC_APPARMOR_PROFILE = "lxc-waydroid"
 125 def get_apparmor_status(args):
 126     enabled = False
 127     if shutil.which("aa-enabled"):
 128         enabled = (tools.helpers.run.user(args, ["aa-enabled", "--quiet"], check=False) == 0)
 129     if not enabled and shutil.which("systemctl"):
 130         enabled = (tools.helpers.run.user(args, ["systemctl", "is-active", "-q", "apparmor"], check=False) == 0)
 131     try:
 132         with open("/sys/kernel/security/apparmor/profiles", "r") as f:
 133             enabled &= (LXC_APPARMOR_PROFILE in f.read())
 134     except:
 135         enabled = False
 136     return enabled
 137
 138 def set_lxc_config(args):
 139     lxc_path = tools.config.defaults["lxc"] + "/waydroid"
 140     lxc_ver = get_lxc_version(args)
 141     if lxc_ver == 0:
 142         raise OSError("LXC is not installed")
 143     config_paths = tools.config.tools_src + "/data/configs/config_"
 144     seccomp_profile = tools.config.tools_src + "/data/configs/waydroid.seccomp"
 145
 146     config_snippets = [ config_paths + "base" ]
 147     # lxc v1 and v2 are bit special because some options got renamed later
 148     if lxc_ver <= 2:
 149         config_snippets.append(config_paths + "1")
 150     else:
 151         for ver in range(3, 5):
 152             snippet = config_paths + str(ver)
 153             if lxc_ver >= ver and os.path.exists(snippet):
 154                 config_snippets.append(snippet)
 155
 156     command = ["mkdir", "-p", lxc_path]
 157     tools.helpers.run.user(args, command)
 158     command = ["sh", "-c", "cat {} > \"{}\"".format(' '.join('"{0}"'.format(w) for w in config_snippets), lxc_path + "/config")]
 159     tools.helpers.run.user(args, command)
 160     command = ["sed", "-i", "s/LXCARCH/{}/".format(platform.machine()), lxc_path + "/config"]
 161     tools.helpers.run.user(args, command)
 162     command = ["cp", "-fpr", seccomp_profile, lxc_path + "/waydroid.seccomp"]
 163     tools.helpers.run.user(args, command)
 164     if get_apparmor_status(args):
 165         command = ["sed", "-i", "-E", "/lxc.aa_profile|lxc.apparmor.profile/ s/unconfined/{}/g".format(LXC_APPARMOR_PROFILE), lxc_path + "/config"]
 166         tools.helpers.run.user(args, command)
 167
 168     nodes = generate_nodes_lxc_config(args)
 169     config_nodes_tmp_path = args.work + "/config_nodes"
 170     config_nodes = open(config_nodes_tmp_path, "w")
 171     for node in nodes:
 172         config_nodes.write(node + "\n")
 173     config_nodes.close()
 174     command = ["mv", config_nodes_tmp_path, lxc_path]
 175     tools.helpers.run.user(args, command)
 176
 177     # Create empty file
 178     open(os.path.join(lxc_path, "config_session"), mode="w").close()
 179
 180 def generate_session_lxc_config(args, session):
 181     nodes = []
 182     def make_entry(src, dist=None, mnt_type="none", options="rbind,create=file 0 0"):
 183         if any(x in src for x in ["\n", "\r"]):
 184             logging.warning("User-provided mount path contains illegal character: " + src)
 185             return False
 186         if dist is None and (not os.path.exists(src) or
 187                              str(os.stat(src).st_uid) != session["user_id"]):
 188             logging.warning("User-provided mount path is not owned by user: " + src)
 189             return False
 190         return add_node_entry(nodes, src, dist, mnt_type, options, check=False)
 191
 192     # Make sure XDG_RUNTIME_DIR exists
 193     if not make_entry("tmpfs", session["xdg_runtime_dir"], options="create=dir 0 0"):
 194         raise OSError("Failed to create XDG_RUNTIME_DIR mount point")
 195
 196     wayland_socket = os.path.realpath(os.path.join(session["xdg_runtime_dir"], session["wayland_display"]))
 197     if not make_entry(wayland_socket):
 198         raise OSError("Failed to bind Wayland socket")
 199
 200     pulse_socket = os.path.join(session["pulse_runtime_path"], "native")
 201     make_entry(pulse_socket)
 202
 203     if not make_entry(session["waydroid_data"], "data", options="rbind 0 0"):
 204         raise OSError("Failed to bind userdata")
 205
 206     lxc_path = tools.config.defaults["lxc"] + "/waydroid"
 207     config_nodes_tmp_path = args.work + "/config_session"
 208     config_nodes = open(config_nodes_tmp_path, "w")
 209     for node in nodes:
 210         config_nodes.write(node + "\n")
 211     config_nodes.close()
 212     command = ["mv", config_nodes_tmp_path, lxc_path]
 213     tools.helpers.run.user(args, command)
 214
 215 def make_base_props(args):
 216     def find_hal(hardware):
 217         hardware_props = [
 218             "ro.hardware." + hardware,
 219             "ro.hardware",
 220             "ro.product.board",
 221             "ro.arch",
 222             "ro.board.platform"]
 223         for p in hardware_props:
 224             prop = tools.helpers.props.host_get(args, p)
 225             if prop != "":
 226                 for lib in ["/odm/lib", "/odm/lib64", "/vendor/lib", "/vendor/lib64", "/system/lib", "/system/lib64"]:
 227                     hal_file = lib + "/hw/" + hardware + "." + prop + ".so"
 228                     if os.path.isfile(hal_file):
 229                         return prop
 230         return ""
 231
 232     def find_hidl(intf):
 233         if args.vendor_type == "MAINLINE":
 234             return False
 235
 236         try:
 237             sm = gbinder.ServiceManager("/dev/hwbinder")
 238             return intf in sm.list_sync()
 239         except:
 240             return False
 241
 242     props = []
 243
 244     if not os.path.exists("/dev/ashmem"):
 245         props.append("sys.use_memfd=true")
 246
 247     egl = tools.helpers.props.host_get(args, "ro.hardware.egl")
 248     dri, _ = tools.helpers.gpu.getDriNode(args)
 249
 250     gralloc = find_hal("gralloc")
 251     if not gralloc:
 252         if find_hidl("android.hardware.graphics.allocator@4.0::IAllocator/default"):
 253             gralloc = "android"
 254     if not gralloc:
 255         if dri:
 256             gralloc = "gbm"
 257             egl = "mesa"
 258         else:
 259             gralloc = "default"
 260             egl = "swiftshader"
 261         props.append("debug.stagefright.ccodec=0")
 262     props.append("ro.hardware.gralloc=" + gralloc)
 263
 264     if egl != "":
 265         props.append("ro.hardware.egl=" + egl)
 266
 267     media_profiles = tools.helpers.props.host_get(args, "media.settings.xml")
 268     if media_profiles != "":
 269         media_profiles = media_profiles.replace("vendor/", "vendor_extra/")
 270         media_profiles = media_profiles.replace("odm/", "odm_extra/")
 271         props.append("media.settings.xml=" + media_profiles)
 272
 273     ccodec = tools.helpers.props.host_get(args, "debug.stagefright.ccodec")
 274     if ccodec != "":
 275         props.append("debug.stagefright.ccodec=" + ccodec)
 276
 277     ext_library = tools.helpers.props.host_get(args, "ro.vendor.extension_library")
 278     if ext_library != "":
 279         ext_library = ext_library.replace("vendor/", "vendor_extra/")
 280         ext_library = ext_library.replace("odm/", "odm_extra/")
 281         props.append("ro.vendor.extension_library=" + ext_library)
 282
 283     vulkan = find_hal("vulkan")
 284     if not vulkan and dri:
 285         vulkan = tools.helpers.gpu.getVulkanDriver(args, os.path.basename(dri))
 286     if vulkan:
 287         props.append("ro.hardware.vulkan=" + vulkan)
 288
 289     treble = tools.helpers.props.host_get(args, "ro.treble.enabled")
 290     if treble != "true":
 291         camera = find_hal("camera")
 292         if camera != "":
 293             props.append("ro.hardware.camera=" + camera)
 294         else:
 295             if args.vendor_type == "MAINLINE":
 296                 props.append("ro.hardware.camera=v4l2")
 297
 298     opengles = tools.helpers.props.host_get(args, "ro.opengles.version")
 299     if opengles == "":
 300         opengles = "196609"
 301     props.append("ro.opengles.version=" + opengles)
 302
 303     if args.images_path not in tools.config.defaults["preinstalled_images_paths"]:
 304         props.append("waydroid.system_ota=" + args.system_ota)
 305         props.append("waydroid.vendor_ota=" + args.vendor_ota)
 306     else:
 307         props.append("waydroid.updater.disabled=true")
 308
 309     props.append("waydroid.tools_version=" + tools.config.version)
 310
 311     if args.vendor_type == "MAINLINE":
 312         props.append("ro.vndk.lite=true")
 313
 314     for product in ["brand", "device", "manufacturer", "model", "name"]:
 315         prop_product = tools.helpers.props.host_get(
 316             args, "ro.product.vendor." + product)
 317         if prop_product != "":
 318             props.append("ro.product.waydroid." + product + "=" + prop_product)
 319         else:
 320             if os.path.isfile("/proc/device-tree/" + product):
 321                 with open("/proc/device-tree/" + product) as f:
 322                     f_value = f.read().strip().rstrip('\x00')
 323                     if f_value != "":
 324                         props.append("ro.product.waydroid." +
 325                                      product + "=" + f_value)
 326
 327     prop_fp = tools.helpers.props.host_get(args, "ro.vendor.build.fingerprint")
 328     if prop_fp != "":
 329         props.append("ro.build.fingerprint=" + prop_fp)
 330
 331     # now append/override with values in [properties] section of waydroid.cfg
 332     cfg = tools.config.load(args)
 333     for k, v in cfg["properties"].items():
 334         for idx, elem in enumerate(props):
 335             if (k+"=") in elem:
 336                 props.pop(idx)
 337         props.append(k+"="+v)
 338
 339     base_props = open(args.work + "/waydroid_base.prop", "w")
 340     for prop in props:
 341         base_props.write(prop + "\n")
 342     base_props.close()
 343
 344
 345 def setup_host_perms(args):
 346     if not os.path.exists(tools.config.defaults["host_perms"]):
 347         os.mkdir(tools.config.defaults["host_perms"])
 348
 349     treble = tools.helpers.props.host_get(args, "ro.treble.enabled")
 350     if treble != "true":
 351         return
 352
 353     sku = tools.helpers.props.host_get(args, "ro.boot.product.hardware.sku")
 354     copy_list = []
 355     copy_list.extend(
 356         glob.glob("/vendor/etc/permissions/android.hardware.nfc.*"))
 357     if os.path.exists("/vendor/etc/permissions/android.hardware.consumerir.xml"):
 358         copy_list.append("/vendor/etc/permissions/android.hardware.consumerir.xml")
 359     copy_list.extend(
 360         glob.glob("/odm/etc/permissions/android.hardware.nfc.*"))
 361     if os.path.exists("/odm/etc/permissions/android.hardware.consumerir.xml"):
 362         copy_list.append("/odm/etc/permissions/android.hardware.consumerir.xml")
 363     if sku != "":
 364         copy_list.extend(
 365             glob.glob("/odm/etc/permissions/sku_{}/android.hardware.nfc.*".format(sku)))
 366         if os.path.exists("/odm/etc/permissions/sku_{}/android.hardware.consumerir.xml".format(sku)):
 367             copy_list.append(
 368                 "/odm/etc/permissions/sku_{}/android.hardware.consumerir.xml".format(sku))
 369
 370     for filename in copy_list:
 371         shutil.copy(filename, tools.config.defaults["host_perms"])
 372
 373 def status(args):
 374     command = ["lxc-info", "-P", tools.config.defaults["lxc"], "-n", "waydroid", "-sH"]
 375     try:
 376         return tools.helpers.run.user(args, command, output_return=True).strip()
 377     except:
 378         logging.info("Couldn't get LXC status. Assuming STOPPED.")
 379         return "STOPPED"
 380
 381 def wait_for_running(args):
 382     lxc_status = status(args)
 383     timeout = 10
 384     while lxc_status != "RUNNING" and timeout > 0:
 385         lxc_status = status(args)
 386         logging.info(
 387             "waiting {} seconds for container to start...".format(timeout))
 388         timeout = timeout - 1
 389         time.sleep(1)
 390     if lxc_status != "RUNNING":
 391         raise OSError("container failed to start")
 392
 393 def start(args):
 394     command = ["lxc-start", "-P", tools.config.defaults["lxc"],
 395                "-F", "-n", "waydroid", "--", "/init"]
 396     tools.helpers.run.user(args, command, output="background")
 397     wait_for_running(args)
 398     # Workaround lxc-start changing stdout/stderr permissions to 700
 399     os.chmod(args.log, 0o666)
 400
 401 def stop(args):
 402     command = ["lxc-stop", "-P",
 403                tools.config.defaults["lxc"], "-n", "waydroid", "-k"]
 404     tools.helpers.run.user(args, command)
 405
 406 def freeze(args):
 407     command = ["lxc-freeze", "-P", tools.config.defaults["lxc"], "-n", "waydroid"]
 408     tools.helpers.run.user(args, command)
 409
 410 def unfreeze(args):
 411     command = ["lxc-unfreeze", "-P",
 412                tools.config.defaults["lxc"], "-n", "waydroid"]
 413     tools.helpers.run.user(args, command)
 414
 415 ANDROID_ENV = {
 416     "PATH": "/product/bin:/apex/com.android.runtime/bin:/apex/com.android.art/bin:/system_ext/bin:/system/bin:/system/xbin:/odm/bin:/vendor/bin:/vendor/xbin",
 417     "ANDROID_ROOT": "/system",
 418     "ANDROID_DATA": "/data",
 419     "ANDROID_STORAGE": "/storage",
 420     "ANDROID_ART_ROOT": "/apex/com.android.art",
 421     "ANDROID_I18N_ROOT": "/apex/com.android.i18n",
 422     "ANDROID_TZDATA_ROOT": "/apex/com.android.tzdata",
 423     "ANDROID_RUNTIME_ROOT": "/apex/com.android.runtime",
 424     "BOOTCLASSPATH": "/apex/com.android.art/javalib/core-oj.jar:/apex/com.android.art/javalib/core-libart.jar:/apex/com.android.art/javalib/core-icu4j.jar:/apex/com.android.art/javalib/okhttp.jar:/apex/com.android.art/javalib/bouncycastle.jar:/apex/com.android.art/javalib/apache-xml.jar:/system/framework/framework.jar:/system/framework/ext.jar:/system/framework/telephony-common.jar:/system/framework/voip-common.jar:/system/framework/ims-common.jar:/system/framework/framework-atb-backward-compatibility.jar:/apex/com.android.conscrypt/javalib/conscrypt.jar:/apex/com.android.media/javalib/updatable-media.jar:/apex/com.android.mediaprovider/javalib/framework-mediaprovider.jar:/apex/com.android.os.statsd/javalib/framework-statsd.jar:/apex/com.android.permission/javalib/framework-permission.jar:/apex/com.android.sdkext/javalib/framework-sdkextensions.jar:/apex/com.android.wifi/javalib/framework-wifi.jar:/apex/com.android.tethering/javalib/framework-tethering.jar"
 425 }
 426
 427 def android_env_attach_options():
 428     env = [k + "=" + v for k, v in ANDROID_ENV.items()]
 429     return [x for var in env for x in ("--set-var", var)]
 430
 431 def shell(args):
 432     state = status(args)
 433     if state == "FROZEN":
 434         unfreeze(args)
 435     elif state != "RUNNING":
 436         logging.error("WayDroid container is {}".format(state))
 437         return
 438     command = ["lxc-attach", "-P", tools.config.defaults["lxc"],
 439                "-n", "waydroid", "--clear-env"]
 440     command.extend(android_env_attach_options())
 441     if args.uid!=None:
 442         command.append("--uid="+str(args.uid))
 443     if args.gid!=None:
 444         command.append("--gid="+str(args.gid))
 445     elif args.uid!=None:
 446         command.append("--gid="+str(args.uid))
 447     if args.nolsm or args.allcaps or args.nocgroup:
 448         elevatedprivs = "--elevated-privileges="
 449         addpipe = False
 450         if args.nolsm:
 451             if addpipe:
 452                 elevatedprivs+="|"
 453             elevatedprivs+="LSM"
 454             addpipe = True
 455         if args.allcaps:
 456             if addpipe:
 457                 elevatedprivs+="|"
 458             elevatedprivs+="CAP"
 459             addpipe = True
 460         if args.nocgroup:
 461             if addpipe:
 462                 elevatedprivs+="|"
 463             elevatedprivs+="CGROUP"
 464             addpipe = True
 465         command.append(elevatedprivs)
 466     if args.context!=None and not args.nolsm:
 467         command.append("--context="+args.context)
 468     command.append("--")
 469     if args.COMMAND:
 470         command.extend(args.COMMAND)
 471     else:
 472         command.append("/system/bin/sh")
 473     subprocess.run(command)
 474     if state == "FROZEN":
 475         freeze(args)
 476
 477 def logcat(args):
 478     args.COMMAND = ["/system/bin/logcat"]
 479     args.uid = None
 480     args.gid = None
 481     args.nolsm = None
 482     args.allcaps = None
 483     args.nocgroup = None
 484     args.context = None
 485     shell(args)