75 lines
2.5 KiB
C
75 lines
2.5 KiB
C
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _ALLOCATE_H_
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#define _ALLOCATE_H_
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#define EXT4_ALLOCATE_FAILED (u32)(~0)
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#include "ext4_utils.h"
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struct region;
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struct region_list {
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struct region *first;
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struct region *last;
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struct region *iter;
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u32 partial_iter;
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};
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struct block_allocation {
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struct region_list list;
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struct region_list oob_list;
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char* filename;
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struct block_allocation* next;
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};
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void block_allocator_init();
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void block_allocator_free();
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u32 allocate_block();
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struct block_allocation *allocate_blocks(u32 len);
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int block_allocation_num_regions(struct block_allocation *alloc);
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int block_allocation_len(struct block_allocation *alloc);
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struct ext4_inode *get_inode(u32 inode);
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struct ext4_xattr_header *get_xattr_block_for_inode(struct ext4_inode *inode);
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void reduce_allocation(struct block_allocation *alloc, u32 len);
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u32 get_block(struct block_allocation *alloc, u32 block);
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u32 get_oob_block(struct block_allocation *alloc, u32 block);
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void get_next_region(struct block_allocation *alloc);
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void get_region(struct block_allocation *alloc, u32 *block, u32 *len);
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u32 get_free_blocks(u32 bg);
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u32 get_free_inodes(u32 bg);
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u32 reserve_inodes(int bg, u32 inodes);
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void add_directory(u32 inode);
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u16 get_directories(int bg);
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u16 get_bg_flags(int bg);
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void init_unused_inode_tables(void);
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u32 allocate_inode();
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void free_alloc(struct block_allocation *alloc);
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int reserve_oob_blocks(struct block_allocation *alloc, int blocks);
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int advance_blocks(struct block_allocation *alloc, int blocks);
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int advance_oob_blocks(struct block_allocation *alloc, int blocks);
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int last_region(struct block_allocation *alloc);
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void rewind_alloc(struct block_allocation *alloc);
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void append_region(struct block_allocation *alloc,
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u32 block, u32 len, int bg);
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struct block_allocation *create_allocation();
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int append_oob_allocation(struct block_allocation *alloc, u32 len);
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void print_blocks(FILE* f, struct block_allocation *alloc);
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#endif
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