1 /* 2 * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms and conditions of the GNU General Public License, 6 * version 2, as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 11 * more details. 12 * 13 * You should have received a copy of the GNU General Public License 14 * along with this program. If not, see <http://www.gnu.org/licenses/>. 15 */ 16 #ifndef _FS_H 17 #define _FS_H 18 19 #include <common.h> 20 21 #define FS_TYPE_ANY 0 22 #define FS_TYPE_FAT 1 23 #define FS_TYPE_EXT 2 24 #define FS_TYPE_SANDBOX 3 25 26 /* 27 * Tell the fs layer which block device an partition to use for future 28 * commands. This also internally identifies the filesystem that is present 29 * within the partition. The identification process may be limited to a 30 * specific filesystem type by passing FS_* in the fstype parameter. 31 * 32 * Returns 0 on success. 33 * Returns non-zero if there is an error accessing the disk or partition, or 34 * no known filesystem type could be recognized on it. 35 */ 36 int fs_set_blk_dev(const char *ifname, const char *dev_part_str, int fstype); 37 38 /* 39 * Print the list of files on the partition previously set by fs_set_blk_dev(), 40 * in directory "dirname". 41 * 42 * Returns 0 on success. Returns non-zero on error. 43 */ 44 int fs_ls(const char *dirname); 45 46 /* 47 * Determine whether a file exists 48 * 49 * Returns 1 if the file exists, 0 if it doesn't exist. 50 */ 51 int fs_exists(const char *filename); 52 53 /* 54 * Read file "filename" from the partition previously set by fs_set_blk_dev(), 55 * to address "addr", starting at byte offset "offset", and reading "len" 56 * bytes. "offset" may be 0 to read from the start of the file. "len" may be 57 * 0 to read the entire file. Note that not all filesystem types support 58 * either/both offset!=0 or len!=0. 59 * 60 * Returns number of bytes read on success. Returns <= 0 on error. 61 */ 62 int fs_read(const char *filename, ulong addr, int offset, int len); 63 64 /* 65 * Write file "filename" to the partition previously set by fs_set_blk_dev(), 66 * from address "addr", starting at byte offset "offset", and writing "len" 67 * bytes. "offset" may be 0 to write to the start of the file. Note that not 68 * all filesystem types support offset!=0. 69 * 70 * Returns number of bytes read on success. Returns <= 0 on error. 71 */ 72 int fs_write(const char *filename, ulong addr, int offset, int len); 73 74 /* 75 * Common implementation for various filesystem commands, optionally limited 76 * to a specific filesystem type via the fstype parameter. 77 */ 78 int do_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], 79 int fstype); 80 int do_ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], 81 int fstype); 82 int file_exists(const char *dev_type, const char *dev_part, const char *file, 83 int fstype); 84 int do_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], 85 int fstype); 86 87 #endif /* _FS_H */ 88