1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef _ALLOCATE_H_
18#define _ALLOCATE_H_
19
20#define EXT4_ALLOCATE_FAILED (u32)(~0)
21
22#include "ext4_utils.h"
23#include "ext4.h"
24#include "xattr.h"
25
26struct block_allocation;
27
28void block_allocator_init();
29void block_allocator_free();
30u32 allocate_block();
31struct block_allocation *allocate_blocks(u32 len);
32int block_allocation_num_regions(struct block_allocation *alloc);
33int block_allocation_len(struct block_allocation *alloc);
34struct ext4_inode *get_inode(u32 inode);
35struct ext4_xattr_header *get_xattr_block_for_inode(struct ext4_inode *inode);
36void reduce_allocation(struct block_allocation *alloc, u32 len);
37u32 get_block(struct block_allocation *alloc, u32 block);
38u32 get_oob_block(struct block_allocation *alloc, u32 block);
39void get_next_region(struct block_allocation *alloc);
40void get_region(struct block_allocation *alloc, u32 *block, u32 *len);
41u32 get_free_blocks(u32 bg);
42u32 get_free_inodes(u32 bg);
43u32 reserve_inodes(int bg, u32 inodes);
44void add_directory(u32 inode);
45u16 get_directories(int bg);
46u16 get_bg_flags(int bg);
47void init_unused_inode_tables(void);
48u32 allocate_inode();
49void free_alloc(struct block_allocation *alloc);
50int reserve_oob_blocks(struct block_allocation *alloc, int blocks);
51int advance_blocks(struct block_allocation *alloc, int blocks);
52int advance_oob_blocks(struct block_allocation *alloc, int blocks);
53int last_region(struct block_allocation *alloc);
54void rewind_alloc(struct block_allocation *alloc);
55void append_region(struct block_allocation *alloc,
56	u32 block, u32 len, int bg);
57struct block_allocation *create_allocation();
58int append_oob_allocation(struct block_allocation *alloc, u32 len);
59
60#endif
61