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