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 #include "ext4.h" 24 #include "xattr.h" 25 26 struct block_allocation; 27 28 void block_allocator_init(); 29 void block_allocator_free(); 30 u32 allocate_block(); 31 struct block_allocation *allocate_blocks(u32 len); 32 int block_allocation_num_regions(struct block_allocation *alloc); 33 int block_allocation_len(struct block_allocation *alloc); 34 struct ext4_inode *get_inode(u32 inode); 35 struct ext4_xattr_header *get_xattr_block_for_inode(struct ext4_inode *inode); 36 void reduce_allocation(struct block_allocation *alloc, u32 len); 37 u32 get_block(struct block_allocation *alloc, u32 block); 38 u32 get_oob_block(struct block_allocation *alloc, u32 block); 39 void get_next_region(struct block_allocation *alloc); 40 void get_region(struct block_allocation *alloc, u32 *block, u32 *len); 41 u32 get_free_blocks(u32 bg); 42 u32 get_free_inodes(u32 bg); 43 u32 reserve_inodes(int bg, u32 inodes); 44 void add_directory(u32 inode); 45 u16 get_directories(int bg); 46 u16 get_bg_flags(int bg); 47 void init_unused_inode_tables(void); 48 u32 allocate_inode(); 49 void free_alloc(struct block_allocation *alloc); 50 int reserve_oob_blocks(struct block_allocation *alloc, int blocks); 51 int advance_blocks(struct block_allocation *alloc, int blocks); 52 int advance_oob_blocks(struct block_allocation *alloc, int blocks); 53 int last_region(struct block_allocation *alloc); 54 void rewind_alloc(struct block_allocation *alloc); 55 void append_region(struct block_allocation *alloc, 56 u32 block, u32 len, int bg); 57 struct block_allocation *create_allocation(); 58 int append_oob_allocation(struct block_allocation *alloc, u32 len); 59 60 #endif 61