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/*
* Copyright (C) 2015 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.
*/
#ifndef BOOTINFO_H_
#define BOOTINFO_H_
#include <stdbool.h>
#include <stdint.h>
typedef struct BrilloSlotInfo {
uint8_t bootable : 1;
uint8_t reserved[3];
} BrilloSlotInfo;
typedef struct BrilloBootInfo {
// Used by fs_mgr. Must be NUL terminated.
char bootctrl_suffix[4];
// Magic for identification - must be 'B', 'C', 'c' (short for
// "boot_control copy" implementation).
uint8_t magic[3];
// Version of BrilloBootInfo struct, must be 0 or larger.
uint8_t version;
// Currently active slot.
uint8_t active_slot;
// Information about each slot.
BrilloSlotInfo slot_info[2];
uint8_t reserved[15];
} BrilloBootInfo;
// Loading and saving BrillBootInfo instances.
bool boot_info_load(BrilloBootInfo* out_info);
bool boot_info_save(BrilloBootInfo* info);
// Returns non-zero if valid.
bool boot_info_validate(BrilloBootInfo* info);
void boot_info_reset(BrilloBootInfo* info);
// Opens partition by |name|, e.g. "misc" or "boot_a" with |flags|
// (e.g. O_RDONLY or O_RDWR) passed directly to open(2). Returns fd on
// success and -1 on error.
int boot_info_open_partition(const char* name, uint64_t* out_size, int flags);
#if defined(__GNUC__) && __GNUC__ >= 4 && __GNUC_MINOR__ >= 6
_Static_assert(sizeof(BrilloBootInfo) == 32, "BrilloBootInfo has wrong size");
#endif
#endif // BOOTINFO_H
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