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 #define FS_TYPE_UBIFS 4 26 27 /* 28 * Tell the fs layer which block device an partition to use for future 29 * commands. This also internally identifies the filesystem that is present 30 * within the partition. The identification process may be limited to a 31 * specific filesystem type by passing FS_* in the fstype parameter. 32 * 33 * Returns 0 on success. 34 * Returns non-zero if there is an error accessing the disk or partition, or 35 * no known filesystem type could be recognized on it. 36 */ 37 int fs_set_blk_dev(const char *ifname, const char *dev_part_str, int fstype); 38 39 /* 40 * Print the list of files on the partition previously set by fs_set_blk_dev(), 41 * in directory "dirname". 42 * 43 * Returns 0 on success. Returns non-zero on error. 44 */ 45 int fs_ls(const char *dirname); 46 47 /* 48 * Determine whether a file exists 49 * 50 * Returns 1 if the file exists, 0 if it doesn't exist. 51 */ 52 int fs_exists(const char *filename); 53 54 /* 55 * fs_size - Determine a file's size 56 * 57 * @filename: Name of the file 58 * @size: Size of file 59 * @return 0 if ok with valid *size, negative on error 60 */ 61 int fs_size(const char *filename, loff_t *size); 62 63 /* 64 * fs_read - Read file from the partition previously set by fs_set_blk_dev() 65 * Note that not all filesystem types support either/both offset!=0 or len!=0. 66 * 67 * @filename: Name of file to read from 68 * @addr: The address to read into 69 * @offset: The offset in file to read from 70 * @len: The number of bytes to read. Maybe 0 to read entire file 71 * @actread: Returns the actual number of bytes read 72 * @return 0 if ok with valid *actread, -1 on error conditions 73 */ 74 int fs_read(const char *filename, ulong addr, loff_t offset, loff_t len, 75 loff_t *actread); 76 77 /* 78 * fs_write - Write file to the partition previously set by fs_set_blk_dev() 79 * Note that not all filesystem types support offset!=0. 80 * 81 * @filename: Name of file to read from 82 * @addr: The address to read into 83 * @offset: The offset in file to read from. Maybe 0 to write to start of file 84 * @len: The number of bytes to write 85 * @actwrite: Returns the actual number of bytes written 86 * @return 0 if ok with valid *actwrite, -1 on error conditions 87 */ 88 int fs_write(const char *filename, ulong addr, loff_t offset, loff_t len, 89 loff_t *actwrite); 90 91 /* 92 * Common implementation for various filesystem commands, optionally limited 93 * to a specific filesystem type via the fstype parameter. 94 */ 95 int do_size(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], 96 int fstype); 97 int do_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], 98 int fstype); 99 int do_ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], 100 int fstype); 101 int file_exists(const char *dev_type, const char *dev_part, const char *file, 102 int fstype); 103 int do_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], 104 int fstype); 105 106 /* 107 * Determine the UUID of the specified filesystem and print it. Optionally it is 108 * possible to store the UUID directly in env. 109 */ 110 int do_fs_uuid(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], 111 int fstype); 112 113 /* 114 * Determine the type of the specified filesystem and print it. Optionally it is 115 * possible to store the type directly in env. 116 */ 117 int do_fs_type(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); 118 119 #endif /* _FS_H */ 120