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66 lines
1.9 KiB
66 lines
1.9 KiB
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef BOOTINFO_H_
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#define BOOTINFO_H_
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#include <stdbool.h>
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#include <stdint.h>
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typedef struct BrilloSlotInfo {
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uint8_t bootable : 1;
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uint8_t reserved[3];
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} BrilloSlotInfo;
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typedef struct BrilloBootInfo {
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// Used by fs_mgr. Must be NUL terminated.
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char bootctrl_suffix[4];
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// Magic for identification - must be 'B', 'C', 'c' (short for
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// "boot_control copy" implementation).
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uint8_t magic[3];
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// Version of BrilloBootInfo struct, must be 0 or larger.
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uint8_t version;
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// Currently active slot.
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uint8_t active_slot;
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// Information about each slot.
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BrilloSlotInfo slot_info[2];
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uint8_t reserved[15];
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} BrilloBootInfo;
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// Loading and saving BrillBootInfo instances.
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bool boot_info_load(BrilloBootInfo* out_info);
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bool boot_info_save(BrilloBootInfo* info);
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// Returns non-zero if valid.
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bool boot_info_validate(BrilloBootInfo* info);
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void boot_info_reset(BrilloBootInfo* info);
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// Opens partition by |name|, e.g. "misc" or "boot_a" with |flags|
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// (e.g. O_RDONLY or O_RDWR) passed directly to open(2). Returns fd on
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// success and -1 on error.
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int boot_info_open_partition(const char* name, uint64_t* out_size, int flags);
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#if defined(__GNUC__) && __GNUC__ >= 4 && __GNUC_MINOR__ >= 6
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_Static_assert(sizeof(BrilloBootInfo) == 32, "BrilloBootInfo has wrong size");
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#endif
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#endif // BOOTINFO_H
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