allocate.h revision ec0a2e83dc66d67addeb90e83144187691852a3e 
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#define EXT4_ALLOCATE_FAILED (u32)(~0)
18
19#include "ext4_utils.h"
20#include "ext4.h"
21
22struct block_allocation;
23
24void block_allocator_init();
25void block_allocator_free();
26u32 allocate_block();
27struct block_allocation *allocate_blocks(u32 len);
28int block_allocation_num_regions(struct block_allocation *alloc);
29int block_allocation_len(struct block_allocation *alloc);
30struct ext4_inode *get_inode(u32 inode);
31void reduce_allocation(struct block_allocation *alloc, u32 len);
32u32 get_block(struct block_allocation *alloc, u32 block);
33u32 get_oob_block(struct block_allocation *alloc, u32 block);
34void get_next_region(struct block_allocation *alloc);
35void get_region(struct block_allocation *alloc, u32 *block, u32 *len);
36u32 get_free_blocks(u32 bg);
37u32 get_free_inodes(u32 bg);
38u32 reserve_inodes(int bg, u32 inodes);
39void add_directory(u32 inode);
40u16 get_directories(int bg);
41u32 allocate_inode();
42void free_alloc(struct block_allocation *alloc);
43int reserve_oob_blocks(struct block_allocation *alloc, int blocks);
44int advance_blocks(struct block_allocation *alloc, int blocks);
45int advance_oob_blocks(struct block_allocation *alloc, int blocks);
46int last_region(struct block_allocation *alloc);
47void rewind_alloc(struct block_allocation *alloc);
48void append_region(struct block_allocation *alloc,
49        u32 block, u32 len, int bg);
50struct block_allocation *create_allocation();
51int append_oob_allocation(struct block_allocation *alloc, u32 len);
52