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 * Determine a file's size 55 * 56 * Returns the file's size in bytes, or a negative value if it doesn't exist. 57 */ 58 int fs_size(const char *filename); 59 60 /* 61 * Read file "filename" from the partition previously set by fs_set_blk_dev(), 62 * to address "addr", starting at byte offset "offset", and reading "len" 63 * bytes. "offset" may be 0 to read from the start of the file. "len" may be 64 * 0 to read the entire file. Note that not all filesystem types support 65 * either/both offset!=0 or len!=0. 66 * 67 * Returns number of bytes read on success. Returns <= 0 on error. 68 */ 69 int fs_read(const char *filename, ulong addr, int offset, int len); 70 71 /* 72 * Write file "filename" to the partition previously set by fs_set_blk_dev(), 73 * from address "addr", starting at byte offset "offset", and writing "len" 74 * bytes. "offset" may be 0 to write to the start of the file. Note that not 75 * all filesystem types support offset!=0. 76 * 77 * Returns number of bytes read on success. Returns <= 0 on error. 78 */ 79 int fs_write(const char *filename, ulong addr, int offset, int len); 80 81 /* 82 * Common implementation for various filesystem commands, optionally limited 83 * to a specific filesystem type via the fstype parameter. 84 */ 85 int do_size(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], 86 int fstype); 87 int do_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], 88 int fstype); 89 int do_ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], 90 int fstype); 91 int file_exists(const char *dev_type, const char *dev_part, const char *file, 92 int fstype); 93 int do_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], 94 int fstype); 95 96 #endif /* _FS_H */ 97