1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
13 #define FS_TYPE_SANDBOX 3
14 #define FS_TYPE_UBIFS 4
15 #define FS_TYPE_BTRFS 5
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.
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.
27 int fs_set_blk_dev(const char *ifname, const char *dev_part_str, int fstype);
30 * fs_set_blk_dev_with_part - Set current block device + partition
32 * Similar to fs_set_blk_dev(), but useful for cases where you already
33 * know the blk_desc and part number.
35 * Returns 0 on success.
36 * Returns non-zero if invalid partition or error accessing the disk.
38 int fs_set_blk_dev_with_part(struct blk_desc *desc, int part);
41 * fs_get_type_name() - Get type of current filesystem
43 * Return: Pointer to filesystem name
45 * Returns a string describing the current filesystem, or the sentinel
46 * "unsupported" for any unrecognised filesystem.
48 const char *fs_get_type_name(void);
51 * Print the list of files on the partition previously set by fs_set_blk_dev(),
52 * in directory "dirname".
54 * Returns 0 on success. Returns non-zero on error.
56 int fs_ls(const char *dirname);
59 * Determine whether a file exists
61 * Returns 1 if the file exists, 0 if it doesn't exist.
63 int fs_exists(const char *filename);
66 * fs_size - Determine a file's size
68 * @filename: Name of the file
70 * @return 0 if ok with valid *size, negative on error
72 int fs_size(const char *filename, loff_t *size);
75 * fs_read() - read file from the partition previously set by fs_set_blk_dev()
77 * Note that not all filesystem drivers support either or both of offset != 0
80 * @filename: full path of the file to read from
81 * @addr: address of the buffer to write to
82 * @offset: offset in the file from where to start reading
83 * @len: the number of bytes to read. Use 0 to read entire file.
84 * @actread: returns the actual number of bytes read
85 * Return: 0 if OK with valid *actread, -1 on error conditions
87 int fs_read(const char *filename, ulong addr, loff_t offset, loff_t len,
91 * fs_write() - write file to the partition previously set by fs_set_blk_dev()
93 * Note that not all filesystem drivers support offset != 0.
95 * @filename: full path of the file to write to
96 * @addr: address of the buffer to read from
97 * @offset: offset in the file from where to start writing
98 * @len: the number of bytes to write
99 * @actwrite: returns the actual number of bytes written
100 * Return: 0 if OK with valid *actwrite, -1 on error conditions
102 int fs_write(const char *filename, ulong addr, loff_t offset, loff_t len,
106 * Directory entry types, matches the subset of DT_x in posix readdir()
107 * which apply to u-boot.
109 #define FS_DT_DIR 4 /* directory */
110 #define FS_DT_REG 8 /* regular file */
111 #define FS_DT_LNK 10 /* symbolic link */
114 * A directory entry, returned by fs_readdir(). Returns information
115 * about the file/directory at the current directory entry position.
118 unsigned type; /* one of FS_DT_x (not a mask) */
119 loff_t size; /* size in bytes */
123 /* Note: fs_dir_stream should be treated as opaque to the user of fs layer */
124 struct fs_dir_stream {
125 /* private to fs. layer: */
126 struct blk_desc *desc;
131 * fs_opendir - Open a directory
133 * @filename: the path to directory to open
134 * @return a pointer to the directory stream or NULL on error and errno
137 struct fs_dir_stream *fs_opendir(const char *filename);
140 * fs_readdir - Read the next directory entry in the directory stream.
142 * Works in an analogous way to posix readdir(). The previously returned
143 * directory entry is no longer valid after calling fs_readdir() again.
144 * After fs_closedir() is called, the returned directory entry is no
147 * @dirs: the directory stream
148 * @return the next directory entry (only valid until next fs_readdir() or
149 * fs_closedir() call, do not attempt to free()) or NULL if the end of
150 * the directory is reached.
152 struct fs_dirent *fs_readdir(struct fs_dir_stream *dirs);
155 * fs_closedir - close a directory stream
157 * @dirs: the directory stream
159 void fs_closedir(struct fs_dir_stream *dirs);
162 * fs_unlink - delete a file or directory
164 * If a given name is a directory, it will be deleted only if it's empty
166 * @filename: Name of file or directory to delete
167 * @return 0 on success, -1 on error conditions
169 int fs_unlink(const char *filename);
172 * fs_mkdir - Create a directory
174 * @filename: Name of directory to create
175 * @return 0 on success, -1 on error conditions
177 int fs_mkdir(const char *filename);
180 * Common implementation for various filesystem commands, optionally limited
181 * to a specific filesystem type via the fstype parameter.
183 int do_size(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
185 int do_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
187 int do_ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
189 int file_exists(const char *dev_type, const char *dev_part, const char *file,
191 int do_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
193 int do_rm(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
195 int do_mkdir(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
197 int do_ln(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
201 * Determine the UUID of the specified filesystem and print it. Optionally it is
202 * possible to store the UUID directly in env.
204 int do_fs_uuid(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
208 * Determine the type of the specified filesystem and print it. Optionally it is
209 * possible to store the type directly in env.
211 int do_fs_type(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);