platform_system_core/fs_mgr/Android.bp

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//
// Copyright (C) 2017 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
cc_defaults {
name: "fs_mgr_defaults",
sanitize: {
misc_undefined: ["integer"],
},
local_include_dirs: ["include/"],
cflags: [
"-Wall",
"-Werror",
],
}
cc_library {
// Do not ever allow this library to be vendor_available as a shared library.
// It does not have a stable interface.
name: "libfs_mgr",
defaults: ["fs_mgr_defaults"],
recovery_available: true,
export_include_dirs: ["include"],
include_dirs: ["system/vold"],
srcs: [
"file_wait.cpp",
"fs_mgr.cpp",
"fs_mgr_format.cpp",
"fs_mgr_verity.cpp",
"fs_mgr_dm_linear.cpp",
"fs_mgr_overlayfs.cpp",
"fs_mgr_roots.cpp",
"fs_mgr_vendor_overlay.cpp",
],
shared_libs: [
"libbase",
"libcrypto",
"libcrypto_utils",
"libcutils",
"libext4_utils",
"libfec",
"liblog",
"liblp",
"libselinux",
],
static_libs: [
"libavb",
"libfs_avb",
"libfstab",
"libdm",
"libgsi",
],
export_static_lib_headers: [
"libfs_avb",
"libfstab",
"libdm",
],
export_shared_lib_headers: [
"liblp",
],
whole_static_libs: [
"liblogwrap",
"libdm",
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",
"libfstab",
],
cppflags: [
"-DALLOW_ADBD_DISABLE_VERITY=0",
],
product_variables: {
debuggable: {
cppflags: [
"-UALLOW_ADBD_DISABLE_VERITY",
"-DALLOW_ADBD_DISABLE_VERITY=1",
],
},
},
}
cc_library_static {
// Do not ever make this a shared library as long as it is vendor_available.
// It does not have a stable interface.
name: "libfstab",
vendor_available: true,
recovery_available: true,
host_supported: true,
defaults: ["fs_mgr_defaults"],
srcs: [
"fs_mgr_fstab.cpp",
"fs_mgr_boot_config.cpp",
"fs_mgr_slotselect.cpp",
],
target: {
darwin: {
enabled: false,
},
},
export_include_dirs: ["include_fstab"],
header_libs: [
"libbase_headers",
"libgsi_headers",
],
}
cc_binary {
name: "remount",
defaults: ["fs_mgr_defaults"],
static_libs: [
"libavb_user",
],
shared_libs: [
"libbootloader_message",
"libbase",
"libcutils",
"libcrypto",
"libext4_utils",
"libfec",
"libfs_mgr",
"liblog",
"liblp",
"libselinux",
],
header_libs: [
"libcutils_headers",
],
srcs: [
"fs_mgr_remount.cpp",
],
cppflags: [
"-DALLOW_ADBD_DISABLE_VERITY=0",
],
product_variables: {
debuggable: {
cppflags: [
"-UALLOW_ADBD_DISABLE_VERITY",
"-DALLOW_ADBD_DISABLE_VERITY=1",
],
},
},
}