101 lines
3.2 KiB
C
101 lines
3.2 KiB
C
/*
|
|
* 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
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* 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/ext4_utils.h"
|
|
|
|
struct region {
|
|
u32 block;
|
|
u32 len;
|
|
int bg;
|
|
struct region *next;
|
|
struct region *prev;
|
|
};
|
|
|
|
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;
|
|
};
|
|
|
|
struct block_group_info {
|
|
u32 first_block;
|
|
int header_blocks;
|
|
int data_blocks_used;
|
|
int has_superblock;
|
|
u8 *bitmaps;
|
|
u8 *block_bitmap;
|
|
u8 *inode_bitmap;
|
|
u8 *inode_table;
|
|
u32 free_blocks;
|
|
u32 free_inodes;
|
|
u32 first_free_inode;
|
|
u16 flags;
|
|
u16 used_dirs;
|
|
int chunk_count;
|
|
int max_chunk_count;
|
|
struct region *chunks;
|
|
};
|
|
|
|
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 region_list_append(struct region_list *list, struct region *reg);
|
|
void region_list_merge(struct region_list *list1, struct region_list *list2);
|
|
void print_blocks(FILE* f, struct block_allocation *alloc, char separator);
|
|
void reserve_bg_chunk(int bg, u32 start_block, u32 size);
|
|
int reserve_blocks_for_allocation(struct block_allocation *alloc);
|
|
#endif
|