1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
15 #define FS_TYPE_SANDBOX 3
16 #define FS_TYPE_UBIFS 4
17 #define FS_TYPE_BTRFS 5
18 #define FS_TYPE_SQUASHFS 6
19 #define FS_TYPE_EROFS 7
20 #define FS_TYPE_SEMIHOSTING 8
25 * do_fat_fsload - Run the fatload command
27 * @cmdtp: Command information for fatload
28 * @flag: Command flags (CMD_FLAG_...)
29 * @argc: Number of arguments
30 * @argv: List of arguments
31 * Return: result (see enum command_ret_t)
33 int do_fat_fsload(struct cmd_tbl *cmdtp, int flag, int argc,
37 * do_ext2load - Run the ext2load command
39 * @cmdtp: Command information for ext2load
40 * @flag: Command flags (CMD_FLAG_...)
41 * @argc: Number of arguments
42 * @argv: List of arguments
43 * Return: result (see enum command_ret_t)
45 int do_ext2load(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]);
48 * Tell the fs layer which block device and partition to use for future
49 * commands. This also internally identifies the filesystem that is present
50 * within the partition. The identification process may be limited to a
51 * specific filesystem type by passing FS_* in the fstype parameter.
53 * Returns 0 on success.
54 * Returns non-zero if there is an error accessing the disk or partition, or
55 * no known filesystem type could be recognized on it.
57 int fs_set_blk_dev(const char *ifname, const char *dev_part_str, int fstype);
60 * fs_set_type() - Tell fs layer which filesystem type is used
62 * This is needed when reading from a non-block device such as sandbox. It does
63 * a similar job to fs_set_blk_dev() but just sets the filesystem type instead
64 * of detecting it and loading it on the block device
66 * @type: Filesystem type to use (FS_TYPE...)
68 void fs_set_type(int type);
71 * fs_set_blk_dev_with_part - Set current block device + partition
73 * Similar to fs_set_blk_dev(), but useful for cases where you already
74 * know the blk_desc and part number.
76 * Returns 0 on success.
77 * Returns non-zero if invalid partition or error accessing the disk.
79 int fs_set_blk_dev_with_part(struct blk_desc *desc, int part);
82 * fs_close() - Unset current block device and partition
84 * fs_close() closes the connection to a file system opened with either
85 * fs_set_blk_dev() or fs_set_dev_with_part().
87 * Many file functions implicitly call fs_close(), e.g. fs_closedir(),
88 * fs_exist(), fs_ln(), fs_ls(), fs_mkdir(), fs_read(), fs_size(), fs_write(),
94 * fs_get_type() - Get type of current filesystem
96 * Return: filesystem type
98 * Returns filesystem type representing the current filesystem, or
99 * FS_TYPE_ANY for any unrecognised filesystem.
101 int fs_get_type(void);
104 * fs_get_type_name() - Get type of current filesystem
106 * Return: Pointer to filesystem name
108 * Returns a string describing the current filesystem, or the sentinel
109 * "unsupported" for any unrecognised filesystem.
111 const char *fs_get_type_name(void);
114 * Print the list of files on the partition previously set by fs_set_blk_dev(),
115 * in directory "dirname".
117 * Returns 0 on success. Returns non-zero on error.
119 int fs_ls(const char *dirname);
122 * Determine whether a file exists
124 * Returns 1 if the file exists, 0 if it doesn't exist.
126 int fs_exists(const char *filename);
129 * fs_size - Determine a file's size
131 * @filename: Name of the file
132 * @size: Size of file
133 * Return: 0 if ok with valid *size, negative on error
135 int fs_size(const char *filename, loff_t *size);
138 * fs_read() - read file from the partition previously set by fs_set_blk_dev()
140 * Note that not all filesystem drivers support either or both of offset != 0
143 * @filename: full path of the file to read from
144 * @addr: address of the buffer to write to
145 * @offset: offset in the file from where to start reading
146 * @len: the number of bytes to read. Use 0 to read entire file.
147 * @actread: returns the actual number of bytes read
148 * Return: 0 if OK with valid *actread, -1 on error conditions
150 int fs_read(const char *filename, ulong addr, loff_t offset, loff_t len,
154 * fs_write() - write file to the partition previously set by fs_set_blk_dev()
156 * Note that not all filesystem drivers support offset != 0.
158 * @filename: full path of the file to write to
159 * @addr: address of the buffer to read from
160 * @offset: offset in the file from where to start writing
161 * @len: the number of bytes to write
162 * @actwrite: returns the actual number of bytes written
163 * Return: 0 if OK with valid *actwrite, -1 on error conditions
165 int fs_write(const char *filename, ulong addr, loff_t offset, loff_t len,
169 * Directory entry types, matches the subset of DT_x in posix readdir()
170 * which apply to u-boot.
172 #define FS_DT_DIR 4 /* directory */
173 #define FS_DT_REG 8 /* regular file */
174 #define FS_DT_LNK 10 /* symbolic link */
176 #define FS_DIRENT_NAME_LEN 256
179 * struct fs_dirent - directory entry
181 * A directory entry, returned by fs_readdir(). Returns information
182 * about the file/directory at the current directory entry position.
185 /** @type: one of FS_DT_x (not a mask) */
187 /** @size: file size */
189 /** @flags: attribute flags (FS_ATTR_*) */
191 /** create_time: time of creation */
192 struct rtc_time create_time;
193 /** access_time: time of last access */
194 struct rtc_time access_time;
195 /** change_time: time of last modification */
196 struct rtc_time change_time;
197 /** name: file name */
198 char name[FS_DIRENT_NAME_LEN];
201 /* Note: fs_dir_stream should be treated as opaque to the user of fs layer */
202 struct fs_dir_stream {
203 /* private to fs. layer: */
204 struct blk_desc *desc;
209 * fs_opendir - Open a directory
211 * @filename: the path to directory to open
212 * Return: a pointer to the directory stream or NULL on error and errno
215 struct fs_dir_stream *fs_opendir(const char *filename);
218 * fs_readdir - Read the next directory entry in the directory stream.
220 * Works in an analogous way to posix readdir(). The previously returned
221 * directory entry is no longer valid after calling fs_readdir() again.
222 * After fs_closedir() is called, the returned directory entry is no
225 * @dirs: the directory stream
226 * Return: the next directory entry (only valid until next fs_readdir() or
227 * fs_closedir() call, do not attempt to free()) or NULL if the end of
228 * the directory is reached.
230 struct fs_dirent *fs_readdir(struct fs_dir_stream *dirs);
233 * fs_closedir - close a directory stream
235 * @dirs: the directory stream
237 void fs_closedir(struct fs_dir_stream *dirs);
240 * fs_unlink - delete a file or directory
242 * If a given name is a directory, it will be deleted only if it's empty
244 * @filename: Name of file or directory to delete
245 * Return: 0 on success, -1 on error conditions
247 int fs_unlink(const char *filename);
250 * fs_mkdir - Create a directory
252 * @filename: Name of directory to create
253 * Return: 0 on success, -1 on error conditions
255 int fs_mkdir(const char *filename);
258 * Common implementation for various filesystem commands, optionally limited
259 * to a specific filesystem type via the fstype parameter.
261 int do_size(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[],
263 int do_load(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[],
265 int do_ls(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[],
267 int file_exists(const char *dev_type, const char *dev_part, const char *file,
269 int do_save(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[],
271 int do_rm(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[],
273 int do_mkdir(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[],
275 int do_ln(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[],
279 * Determine the UUID of the specified filesystem and print it. Optionally it is
280 * possible to store the UUID directly in env.
282 int do_fs_uuid(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[],
286 * Determine the type of the specified filesystem and print it. Optionally it is
287 * possible to store the type directly in env.
289 int do_fs_type(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]);
292 * do_fs_types - List supported filesystems.
294 * @cmdtp: Command information for fstypes
295 * @flag: Command flags (CMD_FLAG_...)
296 * @argc: Number of arguments
297 * @argv: List of arguments
298 * Return: result (see enum command_ret_t)
300 int do_fs_types(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[]);
303 * fs_read_alloc() - Allocate space for a file and read it
305 * You must call fs_set_blk_dev() or a similar function before calling this,
306 * since that sets up the block device to use.
308 * The file is terminated with a nul character
310 * @fname: Filename to read
311 * @size: Size of file to read (must be correct!)
312 * @align: Alignment to use for memory allocation (0 for default)
313 * @bufp: On success, returns the allocated buffer with the nul-terminated file
315 * Return: 0 if OK, -ENOMEM if out of memory, -EIO if read failed
317 int fs_read_alloc(const char *fname, ulong size, uint align, void **bufp);
320 * fs_load_alloc() - Load a file into allocated space
322 * The file is terminated with a nul character
324 * @ifname: Interface name to read from (e.g. "mmc")
325 * @dev_part_str: Device and partition string (e.g. "1:2")
326 * @fname: Filename to read
327 * @max_size: Maximum allowed size for the file (use 0 for 1GB)
328 * @align: Alignment to use for memory allocation (0 for default)
329 * @bufp: On success, returns the allocated buffer with the nul-terminated file
331 * @sizep: On success, returns the size of the file
332 * Return: 0 if OK, -ENOMEM if out of memory, -ENOENT if the file does not
333 * exist, -ENOMEDIUM if the device does not exist, -E2BIG if the file is too
334 * large (greater than @max_size), -EIO if read failed
336 int fs_load_alloc(const char *ifname, const char *dev_part_str,
337 const char *fname, ulong max_size, ulong align, void **bufp,