1 /* 2 * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. 3 * 4 * SPDX-License-Identifier: GPL-2.0 5 */ 6 #ifndef _FS_H 7 #define _FS_H 8 9 #include <common.h> 10 11 #define FS_TYPE_ANY 0 12 #define FS_TYPE_FAT 1 13 #define FS_TYPE_EXT 2 14 #define FS_TYPE_SANDBOX 3 15 #define FS_TYPE_UBIFS 4 16 17 /* 18 * Tell the fs layer which block device an partition to use for future 19 * commands. This also internally identifies the filesystem that is present 20 * within the partition. The identification process may be limited to a 21 * specific filesystem type by passing FS_* in the fstype parameter. 22 * 23 * Returns 0 on success. 24 * Returns non-zero if there is an error accessing the disk or partition, or 25 * no known filesystem type could be recognized on it. 26 */ 27 int fs_set_blk_dev(const char *ifname, const char *dev_part_str, int fstype); 28 29 /* 30 * Print the list of files on the partition previously set by fs_set_blk_dev(), 31 * in directory "dirname". 32 * 33 * Returns 0 on success. Returns non-zero on error. 34 */ 35 int fs_ls(const char *dirname); 36 37 /* 38 * Determine whether a file exists 39 * 40 * Returns 1 if the file exists, 0 if it doesn't exist. 41 */ 42 int fs_exists(const char *filename); 43 44 /* 45 * fs_size - Determine a file's size 46 * 47 * @filename: Name of the file 48 * @size: Size of file 49 * @return 0 if ok with valid *size, negative on error 50 */ 51 int fs_size(const char *filename, loff_t *size); 52 53 /* 54 * fs_read - Read file from the partition previously set by fs_set_blk_dev() 55 * Note that not all filesystem types support either/both offset!=0 or len!=0. 56 * 57 * @filename: Name of file to read from 58 * @addr: The address to read into 59 * @offset: The offset in file to read from 60 * @len: The number of bytes to read. Maybe 0 to read entire file 61 * @actread: Returns the actual number of bytes read 62 * @return 0 if ok with valid *actread, -1 on error conditions 63 */ 64 int fs_read(const char *filename, ulong addr, loff_t offset, loff_t len, 65 loff_t *actread); 66 67 /* 68 * fs_write - Write file to the partition previously set by fs_set_blk_dev() 69 * Note that not all filesystem types support offset!=0. 70 * 71 * @filename: Name of file to read from 72 * @addr: The address to read into 73 * @offset: The offset in file to read from. Maybe 0 to write to start of file 74 * @len: The number of bytes to write 75 * @actwrite: Returns the actual number of bytes written 76 * @return 0 if ok with valid *actwrite, -1 on error conditions 77 */ 78 int fs_write(const char *filename, ulong addr, loff_t offset, loff_t len, 79 loff_t *actwrite); 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 /* 97 * Determine the UUID of the specified filesystem and print it. Optionally it is 98 * possible to store the UUID directly in env. 99 */ 100 int do_fs_uuid(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], 101 int fstype); 102 103 /* 104 * Determine the type of the specified filesystem and print it. Optionally it is 105 * possible to store the type directly in env. 106 */ 107 int do_fs_type(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); 108 109 #endif /* _FS_H */ 110