Create gs201 device folder baseline

clone from gs101 sha 9d1c97c2

Bug: 183183095
Change-Id: Ie7112bdf0aceb33c9e1956aa52e961b670582733

interfaces/boot/1.2/BootControl.cpp

@@ -0,0 +1,420 @@
+/*
+ * Copyright (C) 2020 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/unique_fd.h>
+#include <bootloader_message/bootloader_message.h>
+#include <cutils/properties.h>
+#include <libboot_control/libboot_control.h>
+#include <log/log.h>
+
+#include "DevInfo.h"
+#include "GptUtils.h"
+
+namespace android {
+namespace hardware {
+namespace boot {
+namespace V1_2 {
+namespace implementation {
+
+using android::bootable::GetMiscVirtualAbMergeStatus;
+using android::bootable::InitMiscVirtualAbMessageIfNeeded;
+using android::bootable::SetMiscVirtualAbMergeStatus;
+using android::hardware::boot::V1_0::BoolResult;
+using android::hardware::boot::V1_0::CommandResult;
+using android::hardware::boot::V1_1::MergeStatus;
+
+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(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 bool 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 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;
+    }
+
+    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));
+    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;
+}
+
+}  // namespace
+
+// 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();
+    }
+
+    bool ret;
+    if (isDevInfoValid()) {
+        auto const slot = getCurrentSlot();
+        devinfo.ab_data.slots[slot].successful = 1;
+        ret = DevInfoSync();
+    } else {
+        ret = setSlotFlag(getCurrentSlot(), AB_ATTR_SUCCESSFUL);
+    }
+
+    !ret ? _hidl_cb({false, "Failed to set successful 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();
+    }
+
+    if (isDevInfoValid()) {
+        auto &active_slot_data = devinfo.ab_data.slots[slot];
+        auto &inactive_slot_data = devinfo.ab_data.slots[!slot];
+
+        inactive_slot_data.active = 0;
+        DevInfoInitSlot(active_slot_data);
+
+        if (!DevInfoSync()) {
+            _hidl_cb({false, "Could not update DevInfo data"});
+            return Void();
+        }
+    } else {
+        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);
+
+        // 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') {
+        _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();
+        }
+    }
+
+    //
+    // 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();
+    }
+
+    if (isDevInfoValid()) {
+        auto &slot_data = devinfo.ab_data.slots[slot];
+        slot_data.unbootable = 1;
+        if (!DevInfoSync()) {
+            _hidl_cb({false, "Could not update DevInfo data"});
+            return Void();
+        }
+    } else {
+        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;
+
+    bool unbootable;
+    if (isDevInfoValid()) {
+        auto &slot_data = devinfo.ab_data.slots[slot];
+        unbootable = !!slot_data.unbootable;
+    } else {
+        unbootable = isSlotFlagSet(slot, AB_ATTR_UNBOOTABLE);
+    }
+
+    return 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;
+
+    bool successful;
+    if (isDevInfoValid()) {
+        auto &slot_data = devinfo.ab_data.slots[slot];
+        successful = !!slot_data.successful;
+    } else {
+        successful = isSlotFlagSet(slot, AB_ATTR_SUCCESSFUL);
+    }
+
+    return 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();
+}
+
+// Methods from ::android::hardware::boot::V1_1::IBootControl follow.
+bool BootControl::Init() {
+    return InitMiscVirtualAbMessageIfNeeded();
+}
+
+Return<bool> BootControl::setSnapshotMergeStatus(
+        ::android::hardware::boot::V1_1::MergeStatus status) {
+    return SetMiscVirtualAbMergeStatus(getCurrentSlot(), status);
+}
+
+Return<::android::hardware::boot::V1_1::MergeStatus> BootControl::getSnapshotMergeStatus() {
+    MergeStatus status;
+    if (!GetMiscVirtualAbMergeStatus(getCurrentSlot(), &status)) {
+        return MergeStatus::UNKNOWN;
+    }
+    return status;
+}
+
+// Methods from ::android::hardware::boot::V1_2::IBootControl follow.
+Return<uint32_t> BootControl::getActiveBootSlot() {
+    if (getNumberSlots() == 0)
+        return 0;
+
+    if (isDevInfoValid())
+        return devinfo.ab_data.slots[1].active ? 1 : 0;
+    return isSlotFlagSet(1, AB_ATTR_ACTIVE) ? 1 : 0;
+}
+
+// Methods from ::android::hidl::base::V1_0::IBase follow.
+
+IBootControl *HIDL_FETCH_IBootControl(const char * /* name */) {
+    auto module = new BootControl();
+
+    module->Init();
+
+    return module;
+}
+
+}  // namespace implementation
+}  // namespace V1_2
+}  // namespace boot
+}  // namespace hardware
+}  // namespace android