boot/1.0/default/BootControl.cpp

/*
 * Copyright (C) 2016 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 "android.hardware.boot@1.0-impl"

#include <log/log.h>

#include <hardware/hardware.h>
#include <hardware/boot_control.h>
#include "BootControl.h"

#ifdef BOOT_CONTROL_RECOVERY
extern const hw_module_t HAL_MODULE_INFO_SYM;
#endif

namespace android {
namespace hardware {
namespace boot {
namespace V1_0 {
namespace implementation {

BootControl::BootControl(boot_control_module_t *module) : mModule(module){
}

// Methods from ::android::hardware::boot::V1_0::IBootControl follow.
Return<uint32_t> BootControl::getNumberSlots()  {
    return mModule->getNumberSlots(mModule);
}

Return<uint32_t> BootControl::getCurrentSlot()  {
    return mModule->getCurrentSlot(mModule);
}

Return<void> BootControl::markBootSuccessful(markBootSuccessful_cb _hidl_cb)  {
    int ret = mModule->markBootSuccessful(mModule);
    struct CommandResult cr;
    cr.success = (ret == 0);
    cr.errMsg = strerror(-ret);
    _hidl_cb(cr);
    return Void();
}

Return<void> BootControl::setActiveBootSlot(uint32_t slot, setActiveBootSlot_cb _hidl_cb)  {
    int ret = mModule->setActiveBootSlot(mModule, slot);
    struct CommandResult cr;
    cr.success = (ret == 0);
    cr.errMsg = strerror(-ret);
    _hidl_cb(cr);
    return Void();
}

Return<void> BootControl::setSlotAsUnbootable(uint32_t slot, setSlotAsUnbootable_cb _hidl_cb)  {
    int ret = mModule->setSlotAsUnbootable(mModule, slot);
    struct CommandResult cr;
    cr.success = (ret == 0);
    cr.errMsg = strerror(-ret);
    _hidl_cb(cr);
    return Void();
}

Return<BoolResult> BootControl::isSlotBootable(uint32_t slot)  {
    int32_t ret = mModule->isSlotBootable(mModule, slot);
    if (ret < 0) {
        return BoolResult::INVALID_SLOT;
    }
    return ret ? BoolResult::TRUE : BoolResult::FALSE;
}

Return<BoolResult> BootControl::isSlotMarkedSuccessful(uint32_t slot)  {
    int32_t ret = mModule->isSlotMarkedSuccessful(mModule, slot);
    if (ret < 0) {
        return BoolResult::INVALID_SLOT;
    }
    return ret ? BoolResult::TRUE : BoolResult::FALSE;
}

Return<void> BootControl::getSuffix(uint32_t slot, getSuffix_cb _hidl_cb)  {
    hidl_string ans;
    const char *suffix = mModule->getSuffix(mModule, slot);
    if (suffix) {
        ans = suffix;
    }
    _hidl_cb(ans);
    return Void();
}

#ifdef BOOT_CONTROL_RECOVERY
IBootControl* HIDL_FETCH_IBootControl(const char * /* hal */) {
    boot_control_module_t* module;

    // For devices that don't build a standalone libhardware bootctrl impl for recovery,
    // we simulate the hw_get_module() by accessing it from the current process directly.
    const hw_module_t* hw_module = &HAL_MODULE_INFO_SYM;
    if (!hw_module ||
        strcmp(BOOT_CONTROL_HARDWARE_MODULE_ID, hw_module->id) != 0) {
        ALOGE("Error loading boot_control HAL implementation: %d.", -EINVAL);
        return nullptr;
    }
    module = reinterpret_cast<boot_control_module_t*>(const_cast<hw_module_t*>(hw_module));
    module->init(module);
    return new BootControl(module);
}
#else
IBootControl* HIDL_FETCH_IBootControl(const char* /* hal */) {
    int ret = 0;
    boot_control_module_t* module = NULL;
    hw_module_t **hwm = reinterpret_cast<hw_module_t**>(&module);
    ret = hw_get_module(BOOT_CONTROL_HARDWARE_MODULE_ID, const_cast<const hw_module_t**>(hwm));
    if (ret)
    {
        ALOGE("hw_get_module %s failed: %d", BOOT_CONTROL_HARDWARE_MODULE_ID, ret);
        return nullptr;
    }
    module->init(module);
    return new BootControl(module);
}
#endif
} // namespace implementation
}  // namespace V1_0
}  // namespace boot
}  // namespace hardware
}  // namespace android