block_map.h

/*
 * Copyright (C) 2015-2016 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.
 */

#pragma once

#include "block_tree.h"

struct block_map {
    struct block_tree tree;
};

#define BLOCK_MAP_INITIAL_VALUE(block_map) \
    { .tree = BLOCK_TREE_INITIAL_VALUE(block_map.tree), }

struct block_map_path {
    struct block_tree_path path;
};

void block_map_init(const struct transaction* tr,
                    struct block_map* block_map,
                    const struct block_mac* root,
                    size_t block_size);

bool block_map_get(struct transaction* tr,
                   struct block_map* block_map,
                   data_block_t index,
                   struct block_mac* block_mac);

void block_map_set(struct transaction* tr,
                   struct block_map* block_map,
                   data_block_t index,
                   const struct block_mac* block_mac);

void block_map_put_dirty(struct transaction* tr,
                         struct block_map* block_map,
                         data_block_t index,
                         void* data,
                         struct obj_ref* data_ref);

void block_map_truncate(struct transaction* tr,
                        struct block_map* block_map,
                        data_block_t index);

bool block_map_check(struct transaction* tr,
                     struct block_map* block_map,
                     data_block_t count);

void block_map_free(struct transaction* tr, struct block_map* block_map);