blob: 5c26792cd439309fb97a2785b46a04ed4cb1426a [file] [log] [blame]
* Copyright (C) 2010 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
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
#ifndef _ALLOCATE_H_
#define _ALLOCATE_H_
#define EXT4_ALLOCATE_FAILED (u32)(~0)
#include "ext4_utils.h"
struct region;
struct region_list {
struct region *first;
struct region *last;
struct region *iter;
u32 partial_iter;
struct block_allocation {
struct region_list list;
struct region_list oob_list;
char* filename;
struct block_allocation* next;
void block_allocator_init();
void block_allocator_free();
u32 allocate_block();
struct block_allocation *allocate_blocks(u32 len);
int block_allocation_num_regions(struct block_allocation *alloc);
int block_allocation_len(struct block_allocation *alloc);
struct ext4_inode *get_inode(u32 inode);
struct ext4_xattr_header *get_xattr_block_for_inode(struct ext4_inode *inode);
void reduce_allocation(struct block_allocation *alloc, u32 len);
u32 get_block(struct block_allocation *alloc, u32 block);
u32 get_oob_block(struct block_allocation *alloc, u32 block);
void get_next_region(struct block_allocation *alloc);
void get_region(struct block_allocation *alloc, u32 *block, u32 *len);
u32 get_free_blocks(u32 bg);
u32 get_free_inodes(u32 bg);
u32 reserve_inodes(int bg, u32 inodes);
void add_directory(u32 inode);
u16 get_directories(int bg);
u16 get_bg_flags(int bg);
void init_unused_inode_tables(void);
u32 allocate_inode();
void free_alloc(struct block_allocation *alloc);
int reserve_oob_blocks(struct block_allocation *alloc, int blocks);
int advance_blocks(struct block_allocation *alloc, int blocks);
int advance_oob_blocks(struct block_allocation *alloc, int blocks);
int last_region(struct block_allocation *alloc);
void rewind_alloc(struct block_allocation *alloc);
void append_region(struct block_allocation *alloc,
u32 block, u32 len, int bg);
struct block_allocation *create_allocation();
int append_oob_allocation(struct block_allocation *alloc, u32 len);
void print_blocks(FILE* f, struct block_allocation *alloc);