2 * Copyright (C) 2010 The Android Open Source Project
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
20 #define EXT4_ALLOCATE_FAILED (u32)(~0)
22 #include "ext4_utils.h"
33 struct block_allocation {
34 struct region_list list;
35 struct region_list oob_list;
37 struct block_allocation* next;
41 void block_allocator_init();
42 void block_allocator_free();
44 struct block_allocation *allocate_blocks(u32 len);
45 int block_allocation_num_regions(struct block_allocation *alloc);
46 int block_allocation_len(struct block_allocation *alloc);
47 struct ext4_inode *get_inode(u32 inode);
48 struct ext4_xattr_header *get_xattr_block_for_inode(struct ext4_inode *inode);
49 void reduce_allocation(struct block_allocation *alloc, u32 len);
50 u32 get_block(struct block_allocation *alloc, u32 block);
51 u32 get_oob_block(struct block_allocation *alloc, u32 block);
52 void get_next_region(struct block_allocation *alloc);
53 void get_region(struct block_allocation *alloc, u32 *block, u32 *len);
54 u32 get_free_blocks(u32 bg);
55 u32 get_free_inodes(u32 bg);
56 u32 reserve_inodes(int bg, u32 inodes);
57 void add_directory(u32 inode);
58 u16 get_directories(int bg);
59 u16 get_bg_flags(int bg);
60 void init_unused_inode_tables(void);
62 void free_alloc(struct block_allocation *alloc);
63 int reserve_oob_blocks(struct block_allocation *alloc, int blocks);
64 int advance_blocks(struct block_allocation *alloc, int blocks);
65 int advance_oob_blocks(struct block_allocation *alloc, int blocks);
66 int last_region(struct block_allocation *alloc);
67 void rewind_alloc(struct block_allocation *alloc);
68 void append_region(struct block_allocation *alloc,
69 u32 block, u32 len, int bg);
70 struct block_allocation *create_allocation();
71 int append_oob_allocation(struct block_allocation *alloc, u32 len);
72 void print_blocks(FILE* f, struct block_allocation *alloc);