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 24 struct region; 25 26 struct region_list { 27 struct region *first; 28 struct region *last; 29 struct region *iter; 30 u32 partial_iter; 31 }; 32 33 struct block_allocation { 34 struct region_list list; 35 struct region_list oob_list; 36 char* filename; 37 struct block_allocation* next; 38 }; 39 40 41 void block_allocator_init(void); 42 void block_allocator_free(void); 43 u32 allocate_block(void); 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); 61 u32 allocate_inode(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(void); 71 int append_oob_allocation(struct block_allocation *alloc, u32 len); 72 void print_blocks(FILE* f, struct block_allocation *alloc); 73 74 #endif 75
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