block_cache.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 <reflist.h>
#include <sys/types.h>

#include "block_device.h"

struct block_mac;
struct fs;
struct iv;
struct transaction;

void block_cache_complete_read(struct block_device *dev,
                               data_block_t block,
                               const void *data,
                               size_t data_size,
                               bool failed);

void block_cache_complete_write(struct block_device *dev,
                                data_block_t block,
                                bool failed);

void block_cache_init(void);

void block_cache_clean_transaction(struct transaction *tr);

void block_cache_discard_transaction(struct transaction *tr, bool discard_all);

const void *block_get_no_read(struct transaction *tr,
                              data_block_t block,
                              obj_ref_t *ref);

const void *block_get_super(struct fs *fs,
                            data_block_t block,
                            obj_ref_t *ref);

const void *block_get_no_tr_fail(struct transaction *tr,
                                 const struct block_mac *block_mac,
                                 const struct iv *iv,
                                 obj_ref_t *ref);

const void *block_get(struct transaction *tr,
                      const struct block_mac *block_mac,
                      const struct iv *iv,
                      obj_ref_t *ref);

void *block_dirty(struct transaction *tr, const void *data, bool is_tmp);

bool block_is_clean(struct block_device *dev, data_block_t block);

void block_discard_dirty(const void *data);

void block_discard_dirty_by_block(struct block_device *dev, data_block_t block);

void block_put_dirty(struct transaction *tr, void *data, obj_ref_t *data_ref,
                     struct block_mac *block_mac, void *block_mac_ref);

void block_put_dirty_no_mac(void *data, obj_ref_t *data_ref);

void block_put_dirty_discard(void *data, obj_ref_t *data_ref);

void *block_get_write_no_read(struct transaction *tr,
                              data_block_t block,
                              bool is_tmp,
                              obj_ref_t *ref);

void *block_get_write(struct transaction *tr,
                      const struct block_mac *block_mac,
                      const struct iv *iv,
                      bool is_tmp,
                      obj_ref_t *ref);

void *block_get_cleared(struct transaction *tr,
                        data_block_t block,
                        bool is_tmp,
                        obj_ref_t *ref);

void *block_get_cleared_super(struct transaction *tr,
                              data_block_t block,
                              obj_ref_t *ref);

void *block_move(struct transaction *tr,
                 const void *data,
                 data_block_t block,
                 bool is_tmp);

void *block_get_copy(struct transaction *tr,
                     const void *data,
                     data_block_t block,
                     bool is_tmp,
                     obj_ref_t *new_ref);

void block_put(const void *data, obj_ref_t *ref);

data_block_t data_to_block_num(const void *data); /* test api, remove ? */

uint block_cache_debug_get_ref_block_count(void);