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Merge changes from topic "gs-common_bootctrl-aidl" into main

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* changes:
  gs-common: move sepolicy related to bootctrl hal aidl to gs-common
  gs-common: create bootctrl_aidl.mk and include related modules
  gs-common: move bootctrl hal aidl implementation to gs-common
  gs-common: add device_google_gs-common_license
This commit is contained in:
Treehugger Robot 2023-12-01 03:57:28 +00:00 committed by Android (Google) Code Review
commit e22ade5ae8
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//
// Copyright (C) 2023 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.
//
package {
default_applicable_licenses: ["device_google_gs-common_license"],
}
// Added automatically by a large-scale-change that took the approach of
// 'apply every license found to every target'. While this makes sure we respect
// every license restriction, it may not be entirely correct.
//
// e.g. GPL in an MIT project might only apply to the contrib/ directory.
//
// Please consider splitting the single license below into multiple licenses,
// taking care not to lose any license_kind information, and overriding the
// default license using the 'licenses: [...]' property on targets as needed.
//
// For unused files, consider creating a 'fileGroup' with "//visibility:private"
// to attach the license to, and including a comment whether the files may be
// used in the current project.
// See: http://go/android-license-faq
license {
name: "device_google_gs-common_license",
visibility: [":__subpackages__"],
license_kinds: [
"SPDX-license-identifier-Apache-2.0",
"SPDX-license-identifier-BSD",
],
license_text: [
"NOTICE",
],
}

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Copyright (c) 2014, 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.
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.
Apache License
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http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
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//
// Copyright (C) 2023 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.
//
package {
// See: http://go/android-license-faq
// A large-scale-change added 'default_applicable_licenses' to import
// all of the 'license_kinds' from "//device/google/gs-common:device_google_gs-common_license"
// to get the below license kinds:
// SPDX-license-identifier-Apache-2.0
default_applicable_licenses: [
"//device/google/gs-common:device_google_gs-common_license",
],
}
cc_defaults {
name: "android.hardware.boot-service_common-pixel",
relative_install_path: "hw",
defaults: ["libboot_control_defaults"],
shared_libs: [
"libbase",
"libbinder_ndk",
"libcutils",
"libz",
"libtrusty",
"android.hardware.boot@1.1",
"android.hardware.boot-V1-ndk",
],
static_libs: [
"libboot_control",
"libbootloader_message_vendor",
],
srcs: [
"BootControl.cpp",
"GptUtils.cpp",
"service.cpp"
],
}
cc_binary {
name: "android.hardware.boot-service.default-pixel",
defaults: ["android.hardware.boot-service_common-pixel"],
init_rc: ["android.hardware.boot-service.default-pixel.rc"],
vendor: true,
}
cc_binary {
name: "android.hardware.boot-service.default_recovery-pixel",
defaults: ["android.hardware.boot-service_common-pixel"],
vintf_fragments: ["android.hardware.boot-service.default_recovery-pixel.xml"],
init_rc: ["android.hardware.boot-service.default_recovery-pixel.rc"],
recovery: true,
}

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/*
* Copyright (C) 2023 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.
*/
#define LOG_TAG "bootcontrolhal"
#include "BootControl.h"
#include <android-base/file.h>
#include <android-base/logging.h>
#include <android-base/unique_fd.h>
#include <bootloader_message/bootloader_message.h>
#include <cutils/properties.h>
#include <libboot_control/libboot_control.h>
#include <log/log.h>
#include <trusty/tipc.h>
#include "DevInfo.h"
#include "GptUtils.h"
using HIDLMergeStatus = ::android::bootable::BootControl::MergeStatus;
using ndk::ScopedAStatus;
using android::bootable::GetMiscVirtualAbMergeStatus;
using android::bootable::InitMiscVirtualAbMessageIfNeeded;
using android::bootable::SetMiscVirtualAbMergeStatus;
namespace aidl::android::hardware::boot {
namespace {
// clang-format off
#define BOOT_A_PATH "/dev/block/by-name/boot_a"
#define BOOT_B_PATH "/dev/block/by-name/boot_b"
#define DEVINFO_PATH "/dev/block/by-name/devinfo"
// slot flags
#define AB_ATTR_PRIORITY_SHIFT 52
#define AB_ATTR_PRIORITY_MASK (3UL << AB_ATTR_PRIORITY_SHIFT)
#define AB_ATTR_ACTIVE_SHIFT 54
#define AB_ATTR_ACTIVE (1UL << AB_ATTR_ACTIVE_SHIFT)
#define AB_ATTR_RETRY_COUNT_SHIFT (55)
#define AB_ATTR_RETRY_COUNT_MASK (7UL << AB_ATTR_RETRY_COUNT_SHIFT)
#define AB_ATTR_SUCCESSFUL (1UL << 58)
#define AB_ATTR_UNBOOTABLE (1UL << 59)
#define AB_ATTR_MAX_PRIORITY 3UL
#define AB_ATTR_MAX_RETRY_COUNT 3UL
// clang-format on
static std::string getDevPath(int32_t in_slot) {
char real_path[PATH_MAX];
const char *path = in_slot == 0 ? BOOT_A_PATH : BOOT_B_PATH;
int ret = readlink(path, real_path, sizeof real_path);
if (ret < 0) {
ALOGE("readlink failed for boot device %s\n", strerror(errno));
return std::string();
}
std::string dp(real_path);
// extract /dev/sda.. part
return dp.substr(0, sizeof "/dev/block/sdX" - 1);
}
static bool isSlotFlagSet(int32_t in_slot, uint64_t flag) {
std::string dev_path = getDevPath(in_slot);
if (dev_path.empty()) {
ALOGI("Could not get device path for slot %d\n", in_slot);
return false;
}
GptUtils gpt(dev_path);
if (gpt.Load()) {
ALOGI("failed to load gpt data\n");
return false;
}
gpt_entry *e = gpt.GetPartitionEntry(in_slot ? "boot_b" : "boot_a");
if (e == nullptr) {
ALOGI("failed to get gpt entry\n");
return false;
}
return !!(e->attr & flag);
}
static bool setSlotFlag(int32_t in_slot, uint64_t flag) {
std::string dev_path = getDevPath(in_slot);
if (dev_path.empty()) {
ALOGI("Could not get device path for slot %d\n", in_slot);
return false;
}
GptUtils gpt(dev_path);
if (gpt.Load()) {
ALOGI("failed to load gpt data\n");
return false;
}
gpt_entry *e = gpt.GetPartitionEntry(in_slot ? "boot_b" : "boot_a");
if (e == nullptr) {
ALOGI("failed to get gpt entry\n");
return false;
}
e->attr |= flag;
gpt.Sync();
return true;
}
static bool is_devinfo_valid;
static bool is_devinfo_initialized;
static std::mutex devinfo_lock;
static devinfo_t devinfo;
static bool isDevInfoValid() {
const std::lock_guard<std::mutex> lock(devinfo_lock);
if (is_devinfo_initialized) {
return is_devinfo_valid;
}
is_devinfo_initialized = true;
::android::base::unique_fd fd(open(DEVINFO_PATH, O_RDONLY));
::android::base::ReadFully(fd, &devinfo, sizeof devinfo);
if (devinfo.magic != DEVINFO_MAGIC) {
return is_devinfo_valid;
}
uint32_t version = ((uint32_t)devinfo.ver_major << 16) | devinfo.ver_minor;
// only version 3.3+ supports A/B data
if (version >= 0x0003'0003) {
is_devinfo_valid = true;
}
return is_devinfo_valid;
}
static bool DevInfoSync() {
if (!isDevInfoValid()) {
return false;
}
::android::base::unique_fd fd(open(DEVINFO_PATH, O_WRONLY | O_DSYNC));
return ::android::base::WriteFully(fd, &devinfo, sizeof devinfo);
}
static void DevInfoInitSlot(devinfo_ab_slot_data_t &slot_data) {
slot_data.retry_count = AB_ATTR_MAX_RETRY_COUNT;
slot_data.unbootable = 0;
slot_data.successful = 0;
slot_data.active = 1;
slot_data.fastboot_ok = 0;
}
static int blow_otp_AR(bool secure) {
static const char *dev_name = "/dev/trusty-ipc-dev0";
static const char *otp_name = "com.android.trusty.otp_manager.tidl";
int fd = 1, ret = 0;
uint32_t cmd = secure? OTP_CMD_write_antirbk_secure_ap : OTP_CMD_write_antirbk_non_secure_ap;
fd = tipc_connect(dev_name, otp_name);
if (fd < 0) {
ALOGI("Failed to connect to OTP_MGR ns TA - is it missing?\n");
ret = -1;
return ret;
}
struct otp_mgr_req_base req = {
.command = cmd,
.resp_payload_size = 0,
};
struct iovec iov[] = {
{
.iov_base = &req,
.iov_len = sizeof(req),
},
};
size_t rc = tipc_send(fd, iov, 1, NULL, 0);
if (rc != sizeof(req)) {
ALOGI("Send fail! %zx\n", rc);
return rc;
}
struct otp_mgr_rsp_base resp;
rc = read(fd, &resp, sizeof(resp));
if (rc < 0) {
ALOGI("Read fail! %zx\n", rc);
return rc;
}
if (rc < sizeof(resp)) {
ALOGI("Not enough data! %zx\n", rc);
return -EIO;
}
if (resp.command != (cmd | OTP_RESP_BIT)) {
ALOGI("Wrong command! %x\n", resp.command);
return -EINVAL;
}
if (resp.result != 0) {
fprintf(stderr, "AR writing error! %x\n", resp.result);
return -EINVAL;
}
tipc_close(fd);
return 0;
}
static bool blowAR() {
int ret = blow_otp_AR(true);
if (ret) {
ALOGI("Blow secure anti-rollback OTP failed");
return false;
}
ret = blow_otp_AR(false);
if (ret) {
ALOGI("Blow non-secure anti-rollback OTP failed");
return false;
}
return true;
}
static constexpr MergeStatus ToAIDLMergeStatus(HIDLMergeStatus status) {
switch (status) {
case HIDLMergeStatus::NONE:
return MergeStatus::NONE;
case HIDLMergeStatus::UNKNOWN:
return MergeStatus::UNKNOWN;
case HIDLMergeStatus::SNAPSHOTTED:
return MergeStatus::SNAPSHOTTED;
case HIDLMergeStatus::MERGING:
return MergeStatus::MERGING;
case HIDLMergeStatus::CANCELLED:
return MergeStatus::CANCELLED;
}
}
static constexpr HIDLMergeStatus ToHIDLMergeStatus(MergeStatus status) {
switch (status) {
case MergeStatus::NONE:
return HIDLMergeStatus::NONE;
case MergeStatus::UNKNOWN:
return HIDLMergeStatus::UNKNOWN;
case MergeStatus::SNAPSHOTTED:
return HIDLMergeStatus::SNAPSHOTTED;
case MergeStatus::MERGING:
return HIDLMergeStatus::MERGING;
case MergeStatus::CANCELLED:
return HIDLMergeStatus::CANCELLED;
}
}
} // namespace
BootControl::BootControl() {
CHECK(InitMiscVirtualAbMessageIfNeeded());
}
ScopedAStatus BootControl::getActiveBootSlot(int32_t* _aidl_return) {
int32_t slots = 0;
getNumberSlots(&slots);
if (slots == 0) {
*_aidl_return = 0;
return ScopedAStatus::ok();
}
if (isDevInfoValid()) {
*_aidl_return = devinfo.ab_data.slots[1].active ? 1 : 0;
return ScopedAStatus::ok();
}
*_aidl_return = isSlotFlagSet(1, AB_ATTR_ACTIVE) ? 1 : 0;
return ScopedAStatus::ok();
}
ScopedAStatus BootControl::getCurrentSlot(int32_t* _aidl_return) {
char suffix[PROPERTY_VALUE_MAX];
property_get("ro.boot.slot_suffix", suffix, "_a");
*_aidl_return = std::string(suffix) == "_b" ? 1 : 0;
return ScopedAStatus::ok();
}
ScopedAStatus BootControl::getNumberSlots(int32_t* _aidl_return) {
int32_t slots = 0;
if (access(BOOT_A_PATH, F_OK) == 0)
slots++;
if (access(BOOT_B_PATH, F_OK) == 0)
slots++;
*_aidl_return = slots;
return ScopedAStatus::ok();
}
ScopedAStatus BootControl::getSnapshotMergeStatus(MergeStatus* _aidl_return) {
HIDLMergeStatus status;
int32_t current_slot = 0;
getCurrentSlot(&current_slot);
if (!GetMiscVirtualAbMergeStatus(current_slot, &status)) {
*_aidl_return = MergeStatus::UNKNOWN;
return ScopedAStatus::ok();
}
*_aidl_return = ToAIDLMergeStatus(status);
return ScopedAStatus::ok();
}
ScopedAStatus BootControl::getSuffix(int32_t in_slot, std::string* _aidl_return) {
*_aidl_return = in_slot == 0 ? "_a" : in_slot == 1 ? "_b" : "";
return ScopedAStatus::ok();
}
ScopedAStatus BootControl::isSlotBootable(int32_t in_slot, bool* _aidl_return) {
int32_t slots = 0;
getNumberSlots(&slots);
if (slots == 0) {
*_aidl_return = false;
return ScopedAStatus::ok();
}
if (in_slot >= slots)
return ScopedAStatus::fromServiceSpecificErrorWithMessage(
INVALID_SLOT, (std::string("Invalid slot ") + std::to_string(in_slot)).c_str());
bool unbootable;
if (isDevInfoValid()) {
auto &slot_data = devinfo.ab_data.slots[in_slot];
unbootable = !!slot_data.unbootable;
} else {
unbootable = isSlotFlagSet(in_slot, AB_ATTR_UNBOOTABLE);
}
*_aidl_return = unbootable ? false: true;
return ScopedAStatus::ok();
}
ScopedAStatus BootControl::isSlotMarkedSuccessful(int32_t in_slot, bool* _aidl_return) {
int32_t slots = 0;
getNumberSlots(&slots);
if (slots == 0) {
// just return true so that we don't we another call trying to mark it as successful
// when there is no slots
*_aidl_return = true;
return ScopedAStatus::ok();
}
if (in_slot >= slots)
return ScopedAStatus::fromServiceSpecificErrorWithMessage(
INVALID_SLOT, (std::string("Invalid slot ") + std::to_string(in_slot)).c_str());
bool successful;
if (isDevInfoValid()) {
auto &slot_data = devinfo.ab_data.slots[in_slot];
successful = !!slot_data.successful;
} else {
successful = isSlotFlagSet(in_slot, AB_ATTR_SUCCESSFUL);
}
*_aidl_return = successful ? true : false;
return ScopedAStatus::ok();
}
ScopedAStatus BootControl::markBootSuccessful() {
int32_t slots = 0;
getNumberSlots(&slots);
if (slots == 0) {
// no slots, just return true otherwise Android keeps trying
return ScopedAStatus::ok();
}
bool ret;
int32_t current_slot = 0;
getCurrentSlot(&current_slot);
if (isDevInfoValid()) {
auto const slot = current_slot;
devinfo.ab_data.slots[slot].successful = 1;
ret = DevInfoSync();
} else {
ret = setSlotFlag(current_slot, AB_ATTR_SUCCESSFUL);
}
if (!ret) {
return ScopedAStatus::fromServiceSpecificErrorWithMessage(COMMAND_FAILED,
"Failed to set successful flag");
}
if (!blowAR()) {
ALOGE("Failed to blow anti-rollback counter");
// Ignore the error, since ABL will re-trigger it on reboot
}
return ScopedAStatus::ok();
}
ScopedAStatus BootControl::setActiveBootSlot(int32_t in_slot) {
if (in_slot >= 2) {
return ScopedAStatus::fromServiceSpecificErrorWithMessage(
INVALID_SLOT, (std::string("Invalid slot ") + std::to_string(in_slot)).c_str());
}
if (isDevInfoValid()) {
auto &active_slot_data = devinfo.ab_data.slots[in_slot];
auto &inactive_slot_data = devinfo.ab_data.slots[!in_slot];
inactive_slot_data.active = 0;
DevInfoInitSlot(active_slot_data);
if (!DevInfoSync()) {
return ScopedAStatus::fromServiceSpecificErrorWithMessage(
COMMAND_FAILED, "Could not update DevInfo data");
}
} else {
std::string dev_path = getDevPath(in_slot);
if (dev_path.empty()) {
return ScopedAStatus::fromServiceSpecificErrorWithMessage(
COMMAND_FAILED, "Could not get device path for slot");
}
GptUtils gpt(dev_path);
if (gpt.Load()) {
return ScopedAStatus::fromServiceSpecificErrorWithMessage(COMMAND_FAILED,
"failed to load gpt data");
}
gpt_entry *active_entry = gpt.GetPartitionEntry(in_slot == 0 ? "boot_a" : "boot_b");
gpt_entry *inactive_entry = gpt.GetPartitionEntry(in_slot == 0 ? "boot_b" : "boot_a");
if (active_entry == nullptr || inactive_entry == nullptr) {
return ScopedAStatus::fromServiceSpecificErrorWithMessage(
COMMAND_FAILED, "failed to get entries for boot partitions");
}
ALOGV("slot active attributes %lx\n", active_entry->attr);
ALOGV("slot inactive attributes %lx\n", inactive_entry->attr);
// update attributes for active and inactive
inactive_entry->attr &= ~AB_ATTR_ACTIVE;
active_entry->attr = AB_ATTR_ACTIVE | (AB_ATTR_MAX_PRIORITY << AB_ATTR_PRIORITY_SHIFT) |
(AB_ATTR_MAX_RETRY_COUNT << AB_ATTR_RETRY_COUNT_SHIFT);
}
char boot_dev[PROPERTY_VALUE_MAX];
property_get("ro.boot.bootdevice", boot_dev, "");
if (boot_dev[0] == '\0') {
return ScopedAStatus::fromServiceSpecificErrorWithMessage(
COMMAND_FAILED, "invalid ro.boot.bootdevice prop");
}
std::string boot_lun_path =
std::string("/sys/devices/platform/") + boot_dev + "/pixel/boot_lun_enabled";
int fd = open(boot_lun_path.c_str(), O_RDWR | O_DSYNC);
if (fd < 0) {
// Try old path for kernels < 5.4
// TODO: remove once kernel 4.19 support is deprecated
std::string boot_lun_path =
std::string("/sys/devices/platform/") + boot_dev + "/attributes/boot_lun_enabled";
fd = open(boot_lun_path.c_str(), O_RDWR | O_DSYNC);
if (fd < 0) {
return ScopedAStatus::fromServiceSpecificErrorWithMessage(
COMMAND_FAILED, "failed to open ufs attr boot_lun_enabled");
}
}
//
// bBootLunEn
// 0x1 => Boot LU A = enabled, Boot LU B = disable
// 0x2 => Boot LU A = disable, Boot LU B = enabled
//
int ret = ::android::base::WriteStringToFd(in_slot == 0 ? "1" : "2", fd);
close(fd);
if (ret < 0) {
return ScopedAStatus::fromServiceSpecificErrorWithMessage(
COMMAND_FAILED, "faied to write boot_lun_enabled attribute");
}
return ScopedAStatus::ok();
}
ScopedAStatus BootControl::setSlotAsUnbootable(int32_t in_slot) {
if (in_slot >= 2)
return ScopedAStatus::fromServiceSpecificErrorWithMessage(
INVALID_SLOT, (std::string("Invalid slot ") + std::to_string(in_slot)).c_str());
if (isDevInfoValid()) {
auto &slot_data = devinfo.ab_data.slots[in_slot];
slot_data.unbootable = 1;
if (!DevInfoSync()) {
return ScopedAStatus::fromServiceSpecificErrorWithMessage(
COMMAND_FAILED, "Could not update DevInfo data");
}
} else {
std::string dev_path = getDevPath(in_slot);
if (dev_path.empty()) {
return ScopedAStatus::fromServiceSpecificErrorWithMessage(
COMMAND_FAILED, "Could not get device path for slot");
}
GptUtils gpt(dev_path);
gpt.Load();
gpt_entry *e = gpt.GetPartitionEntry(in_slot ? "boot_b" : "boot_a");
e->attr |= AB_ATTR_UNBOOTABLE;
gpt.Sync();
}
return ScopedAStatus::ok();
}
ScopedAStatus BootControl::setSnapshotMergeStatus(MergeStatus in_status) {
int32_t current_slot = 0;
getCurrentSlot(&current_slot);
if (!SetMiscVirtualAbMergeStatus(current_slot, ToHIDLMergeStatus(in_status)))
return ScopedAStatus::fromServiceSpecificErrorWithMessage(COMMAND_FAILED,
"Operation failed");
return ScopedAStatus::ok();
}
} // namespace aidl::android::hardware::boot

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/*
* Copyright (C) 2023 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.
*/
#pragma once
#include <aidl/android/hardware/boot/BnBootControl.h>
#include <libboot_control/libboot_control.h>
namespace aidl::android::hardware::boot {
class BootControl final : public BnBootControl {
public:
BootControl();
::ndk::ScopedAStatus getActiveBootSlot(int32_t* _aidl_return) override;
::ndk::ScopedAStatus getCurrentSlot(int32_t* _aidl_return) override;
::ndk::ScopedAStatus getNumberSlots(int32_t* _aidl_return) override;
::ndk::ScopedAStatus getSnapshotMergeStatus(
::aidl::android::hardware::boot::MergeStatus* _aidl_return) override;
::ndk::ScopedAStatus getSuffix(int32_t in_slot, std::string* _aidl_return) override;
::ndk::ScopedAStatus isSlotBootable(int32_t in_slot, bool* _aidl_return) override;
::ndk::ScopedAStatus isSlotMarkedSuccessful(int32_t in_slot, bool* _aidl_return) override;
::ndk::ScopedAStatus markBootSuccessful() override;
::ndk::ScopedAStatus setActiveBootSlot(int32_t in_slot) override;
::ndk::ScopedAStatus setSlotAsUnbootable(int32_t in_slot) override;
::ndk::ScopedAStatus setSnapshotMergeStatus(
::aidl::android::hardware::boot::MergeStatus in_status) override;
};
enum otpmgr_command : uint32_t {
OTP_REQ_SHIFT = 1,
OTP_RESP_BIT = 1,
OTP_CMD_write_antirbk_non_secure_ap = (7 << OTP_REQ_SHIFT),
OTP_CMD_write_antirbk_secure_ap = (8 << OTP_REQ_SHIFT),
};
struct otp_mgr_req_base {
uint32_t command;
uint32_t resp_payload_size;
uint8_t handle;
}__packed;
struct otp_mgr_rsp_base {
uint32_t command;
uint32_t resp_payload_size;
int result;
}__packed;
} // namespace aidl::android::hardware::boot

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/*
* Copyright (C) 2021 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.
*/
#pragma once
namespace aidl::android::hardware::boot {
//
// definitions taken from ABL code
//
constexpr uint32_t DEVINFO_MAGIC = 0x49564544;
constexpr size_t DEVINFO_AB_SLOT_COUNT = 2;
struct devinfo_ab_slot_data_t {
uint8_t retry_count;
uint8_t unbootable : 1;
uint8_t successful : 1;
uint8_t active : 1;
uint8_t fastboot_ok : 1;
uint8_t : 4;
uint8_t unused[2];
} __attribute__((packed));
typedef struct {
devinfo_ab_slot_data_t slots[DEVINFO_AB_SLOT_COUNT];
} __attribute__((packed)) devinfo_ab_data_t;
struct devinfo_t {
uint32_t magic;
uint16_t ver_major;
uint16_t ver_minor;
uint8_t unused[40];
devinfo_ab_data_t ab_data;
uint8_t unused1[72]; // use remaining up to complete 128 bytes
} __attribute__((packed));
static_assert(sizeof(devinfo_t) == 128, "invalid devinfo struct size");
} // namespace aidl::android::hardware::boot

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/*
* Copyright (C) 2019 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.
*/
#define LOG_TAG "bootcontrolhal"
#include "GptUtils.h"
#include <android-base/file.h>
#include <errno.h>
#include <linux/fs.h>
#include <log/log.h>
#include <zlib.h>
namespace aidl::android::hardware::boot {
namespace {
static int ValidateGptHeader(gpt_header *gpt) {
if (gpt->signature != GPT_SIGNATURE) {
ALOGE("invalid gpt signature 0x%lx\n", gpt->signature);
return -1;
}
if (gpt->header_size != sizeof(gpt_header)) {
ALOGE("invalid gpt header size %u\n", gpt->header_size);
return -1;
}
if (gpt->entry_size != sizeof(gpt_entry)) {
ALOGE("invalid gpt entry size %u\n", gpt->entry_size);
return -1;
}
return 0;
}
} // namespace
GptUtils::GptUtils(const std::string dev_path) : dev_path(dev_path), fd(0) {}
int GptUtils::Load(void) {
fd = open(dev_path.c_str(), O_RDWR);
if (fd < 0) {
ALOGE("failed to open block dev %s, %d\n", dev_path.c_str(), errno);
return -1;
}
int ret = ioctl(fd, BLKSSZGET, &block_size);
if (ret < 0) {
ALOGE("failed to get block size %d\n", errno);
return -1;
}
// read primary header
lseek64(fd, block_size, SEEK_SET);
ret = read(fd, &gpt_primary, sizeof gpt_primary);
if (ret < 0) {
ALOGE("failed to read gpt primary header %d\n", errno);
return -1;
}
if (ValidateGptHeader(&gpt_primary)) {
ALOGE("error validating gpt header\n");
return -1;
}
// read partition entries
entry_array.resize(gpt_primary.entry_count);
uint32_t entries_size = gpt_primary.entry_size * gpt_primary.entry_count;
lseek64(fd, block_size * gpt_primary.start_lba, SEEK_SET);
ret = read(fd, entry_array.data(), entries_size);
if (ret < 0) {
ALOGE("failed to read gpt partition entries %d\n", errno);
return -1;
}
// read gpt back header
lseek64(fd, block_size * gpt_primary.backup_lba, SEEK_SET);
ret = read(fd, &gpt_backup, sizeof gpt_backup);
if (ret < 0) {
ALOGE("failed to read gpt backup header %d\n", errno);
return -1;
}
if (ValidateGptHeader(&gpt_backup)) {
ALOGW("error validating gpt backup\n"); // just warn about it, not fail
}
// Create map <partition name, gpt_entry pointer>
auto get_name = [](const uint16_t *efi_name) {
char name[37] = {};
for (size_t i = 0; efi_name[i] && i < sizeof name - 1; ++i) name[i] = efi_name[i];
return std::string(name);
};
for (auto const &e : entry_array) {
if (e.name[0] == 0)
break; // stop at the first partition with no name
std::string s = get_name(e.name);
entries[s] = const_cast<gpt_entry *>(&e);
}
return 0;
}
gpt_entry *GptUtils::GetPartitionEntry(std::string name) {
return entries.find(name) != entries.end() ? entries[name] : nullptr;
}
int GptUtils::Sync(void) {
if (!fd)
return -1;
// calculate crc and check if we need to update gpt
gpt_primary.entries_crc32 = crc32(0, reinterpret_cast<uint8_t *>(entry_array.data()),
entry_array.size() * sizeof(gpt_entry));
// save old crc
uint32_t crc = gpt_primary.crc32;
gpt_primary.crc32 = 0;
gpt_primary.crc32 = crc32(0, reinterpret_cast<uint8_t *>(&gpt_primary), sizeof gpt_primary);
if (crc == gpt_primary.crc32)
return 0; // nothing to do (no changes)
ALOGI("updating GPT\n");
lseek64(fd, block_size * gpt_primary.current_lba, SEEK_SET);
int ret = write(fd, &gpt_primary, sizeof gpt_primary);
if (ret < 0) {
ALOGE("failed to write gpt primary header %d\n", errno);
return -1;
}
lseek64(fd, block_size * gpt_primary.start_lba, SEEK_SET);
ret = write(fd, entry_array.data(), entry_array.size() * sizeof(gpt_entry));
if (ret < 0) {
ALOGE("failed to write gpt partition entries %d\n", errno);
return -1;
}
// update GPT backup entries and backup
lseek64(fd, block_size * gpt_backup.start_lba, SEEK_SET);
ret = write(fd, entry_array.data(), entry_array.size() * sizeof(gpt_entry));
if (ret < 0) {
ALOGE("failed to write gpt backup partition entries %d\n", errno);
return -1;
}
gpt_backup.entries_crc32 = gpt_primary.entries_crc32;
gpt_backup.crc32 = 0;
gpt_backup.crc32 = crc32(0, reinterpret_cast<uint8_t *>(&gpt_backup), sizeof gpt_backup);
lseek64(fd, block_size * gpt_primary.backup_lba, SEEK_SET);
ret = write(fd, &gpt_backup, sizeof gpt_backup);
if (ret < 0) {
ALOGE("failed to write gpt backup header %d\n", errno);
return -1;
}
fsync(fd);
return 0;
}
GptUtils::~GptUtils() {
if (fd) {
Sync();
close(fd);
}
}
} // namespace aidl::android::hardware::boot

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/*
* Copyright (C) 2019 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.
*/
#pragma once
#include <map>
#include <string>
#include <vector>
namespace aidl::android::hardware::boot {
#define GPT_SIGNATURE 0x5452415020494645UL
typedef struct {
uint8_t type_guid[16];
uint8_t guid[16];
uint64_t first_lba;
uint64_t last_lba;
uint64_t attr;
uint16_t name[36];
} __attribute__((packed)) gpt_entry;
typedef struct {
uint64_t signature;
uint32_t revision;
uint32_t header_size;
uint32_t crc32;
uint32_t reserved;
uint64_t current_lba;
uint64_t backup_lba;
uint64_t first_usable_lba;
uint64_t last_usable_lba;
uint8_t disk_guid[16];
uint64_t start_lba;
uint32_t entry_count;
uint32_t entry_size;
uint32_t entries_crc32;
} __attribute__((packed)) gpt_header;
class GptUtils {
public:
GptUtils(const std::string dev_path);
int Load(void);
gpt_entry *GetPartitionEntry(std::string name);
int Sync(void);
~GptUtils();
private:
std::string dev_path;
int fd;
uint32_t block_size;
gpt_header gpt_primary;
gpt_header gpt_backup;
std::vector<gpt_entry> entry_array;
std::map<std::string, gpt_entry *> entries;
};
} // namespace aidl::android::hardware::boot

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bootctrl/aidl/android.hardware.boot-service.default-pixel.rc Normal file
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service vendor.boot-default /vendor/bin/hw/android.hardware.boot-service.default-pixel
class early_hal
user root
group root drmrpc

7
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service vendor.boot-default /system/bin/hw/android.hardware.boot-service.default_recovery-pixel
class early_hal
user root
group root
seclabel u:r:hal_bootctl_default:s0
interface aidl android.hardware.boot.IBootControl/default

6
bootctrl/aidl/android.hardware.boot-service.default_recovery-pixel.xml Normal file
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<manifest version="1.0" type="device">
<hal format="aidl">
<name>android.hardware.boot</name>
<fqname>IBootControl/default</fqname>
</hal>
</manifest>

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/*
* Copyright 2023 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.
*/
#define LOG_TAG "aidl.android.hardware.boot-service.default"
#include <android-base/logging.h>
#include <android/binder_manager.h>
#include <android/binder_process.h>
#include <hidl/HidlSupport.h>
#include <hidl/HidlTransportSupport.h>
#include "BootControl.h"
using aidl::android::hardware::boot::BootControl;
using aidl::android::hardware::boot::IBootControl;
using ::android::hardware::configureRpcThreadpool;
using ::android::hardware::joinRpcThreadpool;
int main(int, char* argv[]) {
android::base::InitLogging(argv, android::base::KernelLogger);
ABinderProcess_setThreadPoolMaxThreadCount(0);
std::shared_ptr<IBootControl> service = ndk::SharedRefBase::make<BootControl>();
const std::string instance = std::string(BootControl::descriptor) + "/default";
auto status = AServiceManager_addService(service->asBinder().get(), instance.c_str());
CHECK_EQ(status, STATUS_OK) << "Failed to add service " << instance << " " << status;
LOG(INFO) << "IBootControl AIDL service running...";
ABinderProcess_joinThreadPool();
return EXIT_FAILURE; // should not reach
}

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PRODUCT_PACKAGES += \
android.hardware.boot-service.default-pixel \
android.hardware.boot-service.default_recovery-pixel
BOARD_VENDOR_SEPOLICY_DIRS += device/google/gs-common/bootctrl/sepolicy/aidl

5
bootctrl/sepolicy/aidl/device.te Normal file
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# devinfo block device
type devinfo_block_device, dev_type;
# OTA
type sda_block_device, dev_type;

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bootctrl/sepolicy/aidl/file.te Normal file
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# sysfs
type sysfs_ota, sysfs_type, fs_type;

1
bootctrl/sepolicy/aidl/file_contexts Normal file
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/vendor/bin/hw/android\.hardware\.boot-service\.default-pixel u:object_r:hal_bootctl_default_exec:s0

8
bootctrl/sepolicy/aidl/hal_bootctl_default.te Normal file
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allow hal_bootctl_default devinfo_block_device:blk_file rw_file_perms;
allow hal_bootctl_default sda_block_device:blk_file rw_file_perms;
allow hal_bootctl_default sysfs_ota:file rw_file_perms;
allow hal_bootctl_default tee_device:chr_file rw_file_perms;
recovery_only(`
allow hal_bootctl_default rootfs:dir r_dir_perms;
')