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
);