1 /* 2 * File operations supporting an Ext2-compatible filesystem. 3 * 4 * Copyright (C) 2021 Paul Boddie <paul@boddie.org.uk> 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License as 8 * published by the Free Software Foundation; either version 2 of 9 * the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, 19 * Boston, MA 02110-1301, USA 20 */ 21 22 #pragma once 23 24 #include <mutex> 25 26 #include <ext2fs/ext2fs.h> 27 28 #include <systypes/base.h> 29 #include <systypes/user.h> 30 31 32 33 /* Directory iteration helper type. */ 34 35 class Ext2FileOperations; 36 37 struct Ext2DirectoryIteration 38 { 39 Ext2FileOperations *ops; 40 int (*func)(struct ext2_dir_entry *, int, int, char *, void *); 41 void *priv_data; 42 }; 43 44 45 46 /* An Ext2 file operations collection. */ 47 48 class Ext2FileOperations 49 { 50 protected: 51 std::mutex _lock; 52 ext2_filsys _fs; 53 54 public: 55 explicit Ext2FileOperations(ext2_filsys fs) 56 : _fs(fs) 57 { 58 } 59 60 bool is_directory(ext2_ino_t ino_file); 61 62 bool is_file(ext2_ino_t ino_file); 63 64 long create_file(ext2_ino_t ino_parent, const char *filename, user_t user, 65 ext2_ino_t *ino); 66 67 long find_file(const char *path, ext2_ino_t *ino, const char **remaining); 68 69 void close_file(ext2_file_t file); 70 71 long open_file(ext2_ino_t ino, ext2_file_t *file); 72 73 offset_t get_size(ext2_file_t file); 74 75 void set_size(ext2_file_t file, offset_t size); 76 77 offset_t read_file(ext2_file_t file, offset_t filepos, void *addr, offset_t size); 78 79 void write_file(ext2_file_t file, offset_t filepos, const void *addr, offset_t size); 80 81 long directory_iterate(ext2_ino_t dir, 82 int func(struct ext2_dir_entry *, int, int, char *, void *), 83 void *priv_data); 84 85 long read_inode(ext2_ino_t ino_file, struct ext2_inode *inode); 86 87 /* Callback method. */ 88 89 int directory_iterate_fn(struct ext2_dir_entry *dir_entry, 90 int offset, int blocksize, 91 char *buf, struct Ext2DirectoryIteration *priv_data); 92 }; 93 94 // vim: tabstop=4 expandtab shiftwidth=4