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Diffstat (limited to 'interfaces/boot/1.0/BootControl.cpp')
-rw-r--r--interfaces/boot/1.0/BootControl.cpp272
1 files changed, 0 insertions, 272 deletions
diff --git a/interfaces/boot/1.0/BootControl.cpp b/interfaces/boot/1.0/BootControl.cpp
deleted file mode 100644
index 1f155c9..0000000
--- a/interfaces/boot/1.0/BootControl.cpp
+++ /dev/null
@@ -1,272 +0,0 @@
-/*
- * 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 "BootControl.h"
-#include "GptUtils.h"
-
-#include <android-base/file.h>
-#include <cutils/properties.h>
-#include <log/log.h>
-
-namespace android {
-namespace hardware {
-namespace boot {
-namespace V1_0 {
-namespace implementation {
-
-namespace {
-
-#define BOOT_A_PATH "/dev/block/by-name/boot_a"
-#define BOOT_B_PATH "/dev/block/by-name/boot_b"
-
-// 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
-
-static std::string getDevPath(uint32_t slot) {
- char real_path[PATH_MAX];
-
- const char *path = 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(uint32_t slot, uint64_t flag) {
- std::string dev_path = getDevPath(slot);
- if (dev_path.empty()) {
- ALOGI("Could not get device path for slot %d\n", slot);
- return false;
- }
-
- GptUtils gpt(dev_path);
- if (gpt.Load()) {
- ALOGI("failed to load gpt data\n");
- return false;
- }
-
- gpt_entry *e = gpt.GetPartitionEntry(slot ? "boot_b" : "boot_a");
- if (e == nullptr) {
- ALOGI("failed to get gpt entry\n");
- return false;
- }
-
- return !!(e->attr & flag);
-}
-
-static int setSlotFlag(uint32_t slot, uint64_t flag) {
- std::string dev_path = getDevPath(slot);
- if (dev_path.empty()) {
- ALOGI("Could not get device path for slot %d\n", slot);
- return -1;
- }
-
- GptUtils gpt(dev_path);
- if (gpt.Load()) {
- ALOGI("failed to load gpt data\n");
- return -1;
- }
-
- gpt_entry *e = gpt.GetPartitionEntry(slot ? "boot_b" : "boot_a");
- if (e == nullptr) {
- ALOGI("failed to get gpt entry\n");
- return -1;
- }
-
- e->attr |= flag;
- gpt.Sync();
-
- return 0;
-}
-
-}
-
-// Methods from ::android::hardware::boot::V1_0::IBootControl follow.
-Return<uint32_t> BootControl::getNumberSlots() {
- uint32_t slots = 0;
-
- if (access(BOOT_A_PATH, F_OK) == 0)
- slots++;
-
- if (access(BOOT_B_PATH, F_OK) == 0)
- slots++;
-
- return slots;
-}
-
-Return<uint32_t> BootControl::getCurrentSlot() {
- char suffix[PROPERTY_VALUE_MAX];
- property_get("ro.boot.slot_suffix", suffix, "_a");
- return std::string(suffix) == "_b" ? 1 : 0;
-}
-
-Return<void> BootControl::markBootSuccessful(markBootSuccessful_cb _hidl_cb) {
- if (getNumberSlots() == 0) {
- // no slots, just return true otherwise Android keeps trying
- _hidl_cb({true, ""});
- return Void();
- }
- int ret = setSlotFlag(getCurrentSlot(), AB_ATTR_SUCCESSFUL);
- ret ? _hidl_cb({false, "Failed to set successfull flag"}) : _hidl_cb({true, ""});
- return Void();
-}
-
-Return<void> BootControl::setActiveBootSlot(uint32_t slot, setActiveBootSlot_cb _hidl_cb) {
- if (slot >= 2) {
- _hidl_cb({false, "Invalid slot"});
- return Void();
- }
-
- std::string dev_path = getDevPath(slot);
- if (dev_path.empty()) {
- _hidl_cb({false, "Could not get device path for slot"});
- return Void();
- }
-
- GptUtils gpt(dev_path);
- if (gpt.Load()) {
- _hidl_cb({false, "failed to load gpt data"});
- return Void();
- }
-
- gpt_entry *active_entry = gpt.GetPartitionEntry(slot == 0 ? "boot_a" : "boot_b");
- gpt_entry *inactive_entry = gpt.GetPartitionEntry(slot == 0 ? "boot_b" : "boot_a");
- if (active_entry == nullptr || inactive_entry == nullptr) {
- _hidl_cb({false, "failed to get entries for boot partitions"});
- return Void();
- }
-
- ALOGV("slot active attributes %lx\n", active_entry->attr);
- ALOGV("slot inactive attributes %lx\n", inactive_entry->attr);
-
- char boot_dev[PROPERTY_VALUE_MAX];
- property_get("ro.boot.bootdevice", boot_dev, "");
- if (boot_dev[0] == '\0') {
- _hidl_cb({false, "invalid ro.boot.bootdevice prop"});
- return Void();
- }
-
- 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);
- 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);
- if (fd < 0) {
- _hidl_cb({false, "failed to open ufs attr boot_lun_enabled"});
- return Void();
- }
- }
-
- // 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);
-
- //
- // bBootLunEn
- // 0x1 => Boot LU A = enabled, Boot LU B = disable
- // 0x2 => Boot LU A = disable, Boot LU B = enabled
- //
- int ret = android::base::WriteStringToFd(slot == 0 ? "1" : "2", fd);
- close(fd);
- if (ret < 0) {
- _hidl_cb({false, "faied to write boot_lun_enabled attribute"});
- return Void();
- }
-
- _hidl_cb({true, ""});
- return Void();
-}
-
-Return<void> BootControl::setSlotAsUnbootable(uint32_t slot, setSlotAsUnbootable_cb _hidl_cb) {
- if (slot >= 2) {
- _hidl_cb({false, "Invalid slot"});
- return Void();
- }
-
- std::string dev_path = getDevPath(slot);
- if (dev_path.empty()) {
- _hidl_cb({false, "Could not get device path for slot"});
- return Void();
- }
-
- GptUtils gpt(dev_path);
- gpt.Load();
-
- gpt_entry *e = gpt.GetPartitionEntry(slot ? "boot_b" : "boot_a");
- e->attr |= AB_ATTR_UNBOOTABLE;
-
- gpt.Sync();
-
- _hidl_cb({true, ""});
- return Void();
-}
-
-Return<::android::hardware::boot::V1_0::BoolResult> BootControl::isSlotBootable(uint32_t slot) {
- if (getNumberSlots() == 0)
- return BoolResult::FALSE;
- if (slot >= getNumberSlots())
- return BoolResult::INVALID_SLOT;
- return isSlotFlagSet(slot, AB_ATTR_UNBOOTABLE) ? BoolResult::FALSE : BoolResult::TRUE;
-}
-
-Return<::android::hardware::boot::V1_0::BoolResult> BootControl::isSlotMarkedSuccessful(uint32_t slot) {
- if (getNumberSlots() == 0) {
- // just return true so that we don't we another call trying to mark it as successful
- // when there is no slots
- return BoolResult::TRUE;
- }
- if (slot >= getNumberSlots())
- return BoolResult::INVALID_SLOT;
- return isSlotFlagSet(slot, AB_ATTR_SUCCESSFUL) ? BoolResult::TRUE : BoolResult::FALSE;
-}
-
-Return<void> BootControl::getSuffix(uint32_t slot, getSuffix_cb _hidl_cb) {
- _hidl_cb(slot == 0 ? "_a" : slot == 1 ? "_b" : "");
- return Void();
-}
-
-extern "C" IBootControl* HIDL_FETCH_IBootControl(const char*) {
- return new BootControl();
-}
-
-} // namespace implementation
-} // namespace V1_0
-} // namespace boot
-} // namespace hardware
-} // namespace android
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