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 FS_H 18 #define FS_H 19 20 #include "fatblock.h" 21 #include "fat.h" 22 23 struct fs { 24 uint16_t cluster_size; 25 26 cluster_t num_clusters; 27 cluster_t next_cluster; 28 struct extent *extents; 29 30 struct fat_boot_sector boot; 31 struct extent boot_extent; 32 struct extent backup_boot_extent; 33 34 struct fat_info_sector info; 35 struct extent info_extent; 36 37 struct extent fat_extent; 38 fat_entry_t *fat; 39 offset_t fat_size; 40 41 offset_t data_offset; 42 }; 43 44 int fs_alloc_extent(struct fs *fs, struct extent *extent, 45 offset_t len, int type, cluster_t *first_cluster_out); 46 struct extent *fs_find_extent(struct fs *fs, offset_t start, offset_t len, struct extent *last, 47 offset_t *r_start_out, offset_t *e_start_out, offset_t *len_out); 48 int fs_init(struct fs *fs, uint16_t cluster_size, offset_t data_size, offset_t *total_size_out); 49 void fs_set_rootdir_start(struct fs *fs, cluster_t rootdir_start); 50 void fs_update_free_clusters(struct fs *fs); 51 52 #endif 53