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 * fs_size - Determine a file's size 55 * 56 * @filename: Name of the file 57 * @size: Size of file 58 * @return 0 if ok with valid *size, negative on error 59 */ 60 int fs_size(const char *filename, loff_t *size); 61 62 /* 63 * fs_read - Read file from the partition previously set by fs_set_blk_dev() 64 * Note that not all filesystem types support either/both offset!=0 or len!=0. 65 * 66 * @filename: Name of file to read from 67 * @addr: The address to read into 68 * @offset: The offset in file to read from 69 * @len: The number of bytes to read. Maybe 0 to read entire file 70 * @actread: Returns the actual number of bytes read 71 * @return 0 if ok with valid *actread, -1 on error conditions 72 */ 73 int fs_read(const char *filename, ulong addr, loff_t offset, loff_t len, 74 loff_t *actread); 75 76 /* 77 * fs_write - Write file to the partition previously set by fs_set_blk_dev() 78 * Note that not all filesystem types support offset!=0. 79 * 80 * @filename: Name of file to read from 81 * @addr: The address to read into 82 * @offset: The offset in file to read from. Maybe 0 to write to start of file 83 * @len: The number of bytes to write 84 * @actwrite: Returns the actual number of bytes written 85 * @return 0 if ok with valid *actwrite, -1 on error conditions 86 */ 87 int fs_write(const char *filename, ulong addr, loff_t offset, loff_t len, 88 loff_t *actwrite); 89 90 /* 91 * Common implementation for various filesystem commands, optionally limited 92 * to a specific filesystem type via the fstype parameter. 93 */ 94 int do_size(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], 95 int fstype); 96 int do_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], 97 int fstype); 98 int do_ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], 99 int fstype); 100 int file_exists(const char *dev_type, const char *dev_part, const char *file, 101 int fstype); 102 int do_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], 103 int fstype); 104 105 /* 106 * Determine the UUID of the specified filesystem and print it. Optionally it is 107 * possible to store the UUID directly in env. 108 */ 109 int do_fs_uuid(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], 110 int fstype); 111 112 #endif /* _FS_H */ 113