platform_system_core/init/Android.mk

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# Copyright 2005 The Android Open Source Project
LOCAL_PATH:= $(call my-dir)
-include system/sepolicy/policy_version.mk
# --
ifneq (,$(filter userdebug eng,$(TARGET_BUILD_VARIANT)))
init_options += \
-DALLOW_FIRST_STAGE_CONSOLE=1 \
-DALLOW_LOCAL_PROP_OVERRIDE=1 \
-DALLOW_PERMISSIVE_SELINUX=1 \
-DREBOOT_BOOTLOADER_ON_PANIC=1 \
-DWORLD_WRITABLE_KMSG=1 \
-DDUMP_ON_UMOUNT_FAILURE=1
else
init_options += \
-DALLOW_FIRST_STAGE_CONSOLE=0 \
-DALLOW_LOCAL_PROP_OVERRIDE=0 \
-DALLOW_PERMISSIVE_SELINUX=0 \
-DREBOOT_BOOTLOADER_ON_PANIC=0 \
-DWORLD_WRITABLE_KMSG=0 \
-DDUMP_ON_UMOUNT_FAILURE=0
endif
ifneq (,$(filter eng,$(TARGET_BUILD_VARIANT)))
init_options += \
-DSHUTDOWN_ZERO_TIMEOUT=1
else
init_options += \
-DSHUTDOWN_ZERO_TIMEOUT=0
endif
init_options += -DLOG_UEVENTS=0 \
-DSEPOLICY_VERSION=$(POLICYVERS)
init_cflags += \
$(init_options) \
-Wall -Wextra \
-Wno-unused-parameter \
-Werror \
# --
# Do not build this even with mmma if we're system-as-root, otherwise it will overwrite the symlink.
ifneq ($(BOARD_BUILD_SYSTEM_ROOT_IMAGE),true)
include $(CLEAR_VARS)
LOCAL_CPPFLAGS := $(init_cflags)
LOCAL_SRC_FILES := \
devices.cpp \
first_stage_init.cpp \
first_stage_main.cpp \
first_stage_mount.cpp \
Proper mount namespace configuration for bionic This CL fixes the design problem of the previous mechanism for providing the bootstrap bionic and the runtime bionic to the same path. Previously, bootstrap bionic was self-bind-mounted; i.e. /system/bin/libc.so is bind-mounted to itself. And the runtime bionic was bind-mounted on top of the bootstrap bionic. This has not only caused problems like `adb sync` not working(b/122737045), but also is quite difficult to understand due to the double-and-self mounting. This is the new design: Most importantly, these four are all distinct: 1) bootstrap bionic (/system/lib/bootstrap/libc.so) 2) runtime bionic (/apex/com.android.runtime/lib/bionic/libc.so) 3) mount point for 1) and 2) (/bionic/lib/libc.so) 4) symlink for 3) (/system/lib/libc.so -> /bionic/lib/libc.so) Inside the mount namespace of the pre-apexd processes, 1) is bind-mounted to 3). Likewise, inside the mount namespace of the post-apexd processes, 2) is bind-mounted to 3). In other words, there is no self-mount, and no double-mount. Another change is that mount points are under /bionic and the legacy paths become symlinks to the mount points. This is to make sure that there is no bind mounts under /system, which is breaking some apps. Finally, code for creating mount namespaces, mounting bionic, etc are refactored to mount_namespace.cpp Bug: 120266448 Bug: 123275379 Test: m, device boots, adb sync/push/pull works, especially with following paths: /bionic/lib64/libc.so /bionic/bin/linker64 /system/lib64/bootstrap/libc.so /system/bin/bootstrap/linker64 Change-Id: Icdfbdcc1efca540ac854d4df79e07ee61fca559f
2019-01-16 15:00:59 +01:00
mount_namespace.cpp \
reboot_utils.cpp \
selabel.cpp \
selinux.cpp \
switch_root.cpp \
uevent_listener.cpp \
util.cpp \
LOCAL_MODULE := init_first_stage
LOCAL_MODULE_STEM := init
LOCAL_FORCE_STATIC_EXECUTABLE := true
LOCAL_MODULE_PATH := $(TARGET_RAMDISK_OUT)
LOCAL_UNSTRIPPED_PATH := $(TARGET_RAMDISK_OUT_UNSTRIPPED)
# Install adb_debug.prop into debug ramdisk.
# This allows adb root on a user build, when debug ramdisk is used.
LOCAL_REQUIRED_MODULES := \
adb_debug.prop \
# Set up the same mount points on the ramdisk that system-as-root contains.
LOCAL_POST_INSTALL_CMD := mkdir -p \
$(TARGET_RAMDISK_OUT)/apex \
$(TARGET_RAMDISK_OUT)/debug_ramdisk \
$(TARGET_RAMDISK_OUT)/dev \
$(TARGET_RAMDISK_OUT)/mnt \
$(TARGET_RAMDISK_OUT)/proc \
$(TARGET_RAMDISK_OUT)/sys \
LOCAL_STATIC_LIBRARIES := \
libc++fs \
libfs_avb \
libfs_mgr \
libfec \
libfec_rs \
libsquashfs_utils \
liblogwrap \
libext4_utils \
libfscrypt \
libcrypto_utils \
libsparse \
libavb \
libkeyutils \
liblp \
libcutils \
libbase \
liblog \
libcrypto_static \
libdl \
libz \
libselinux \
libcap \
libgsi \
libcom.android.sysprop.apex \
liblzma \
libdexfile_support_static \
libunwindstack \
libbacktrace \
libmodprobe \
libdm: Improve the reliability of dm device paths. This fixes a race condition where WaitForFile() after GetDmDevicePathByName appears to succeed, but a subsequent operation on the path fails. This can happen when CreateDevice() is called immediately after a call to DeleteDevice (from any process), and the path is re-used, enqueuing udev events to remove and re-add the block device. The fix for this is to introduce a new variant of CreateDevice() that has a timeout parameter. When the timeout is positive, CreateDevice() will wait for a /dev/block/mapper/by-uuid symlink to be created, which signals that ueventd has finished processing the operation. ueventd will now create these by-uuid symlinks for device-mapper nodes. Unfortunately, the uuid is only available during "change" events, so we have to special case device-mapper symlink creation. And since the uuid is not available during "remove" events, we simply find matching links to remove them. This ensures that callers of CreateDevice() can use the device path knowing that no asynchronous removals are pending. Code that uses the old CreateDevice+WaitForFile pattern will be transitioned to the new method. Note that it is safe to ignore the timeout, or to use the "unsafe" CreateDevice, if the caller ensures the path by other means. For example first-stage init has no device removal, and regenerates uevents until it has acquired all the paths it needs. Finally, since libdm now inspects sysfs unconditionally, libdm consumers need r_dir_file perms for sysfs_dm in their sepolicy. Additionally linking to libdm now requires linking to libext2_uuid. Bug: 135771280 Test: libdm_test device flashes, boots Change-Id: If5a7383ea38f32a7fbbcf24842dce6a668050a70
2019-06-27 02:00:00 +02:00
libext2_uuid \
libprotobuf-cpp-lite \
libsnapshot_nobinder \
LOCAL_SANITIZE := signed-integer-overflow
# First stage init is weird: it may start without stdout/stderr, and no /proc.
LOCAL_NOSANITIZE := hwaddress
include $(BUILD_EXECUTABLE)
endif
include $(CLEAR_VARS)
LOCAL_MODULE := init_system
LOCAL_REQUIRED_MODULES := \
init_second_stage \
include $(BUILD_PHONY_PACKAGE)
include $(CLEAR_VARS)
LOCAL_MODULE := init_vendor
ifneq ($(BOARD_BUILD_SYSTEM_ROOT_IMAGE),true)
LOCAL_REQUIRED_MODULES := \
init_first_stage \
endif
include $(BUILD_PHONY_PACKAGE)