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()
76 * Note that not all filesystem types support either/both offset!=0 or len!=0.
78 * @filename: Name of file to read from
79 * @addr: The address to read into
80 * @offset: The offset in file to read from
81 * @len: The number of bytes to read. Maybe 0 to read entire file
82 * @actread: Returns the actual number of bytes read
83 * @return 0 if ok with valid *actread, -1 on error conditions
85 int fs_read(const char *filename, ulong addr, loff_t offset, loff_t len,
89 * fs_write - Write file to the partition previously set by fs_set_blk_dev()
90 * Note that not all filesystem types support offset!=0.
92 * @filename: Name of file to read from
93 * @addr: The address to read into
94 * @offset: The offset in file to read from. Maybe 0 to write to start of file
95 * @len: The number of bytes to write
96 * @actwrite: Returns the actual number of bytes written
97 * @return 0 if ok with valid *actwrite, -1 on error conditions
99 int fs_write(const char *filename, ulong addr, loff_t offset, loff_t len,
103 * Directory entry types, matches the subset of DT_x in posix readdir()
104 * which apply to u-boot.
106 #define FS_DT_DIR 4 /* directory */
107 #define FS_DT_REG 8 /* regular file */
108 #define FS_DT_LNK 10 /* symbolic link */
111 * A directory entry, returned by fs_readdir(). Returns information
112 * about the file/directory at the current directory entry position.
115 unsigned type; /* one of FS_DT_x (not a mask) */
116 loff_t size; /* size in bytes */
120 /* Note: fs_dir_stream should be treated as opaque to the user of fs layer */
121 struct fs_dir_stream {
122 /* private to fs. layer: */
123 struct blk_desc *desc;
128 * fs_opendir - Open a directory
130 * @filename: the path to directory to open
131 * @return a pointer to the directory stream or NULL on error and errno
134 struct fs_dir_stream *fs_opendir(const char *filename);
137 * fs_readdir - Read the next directory entry in the directory stream.
139 * Works in an analogous way to posix readdir(). The previously returned
140 * directory entry is no longer valid after calling fs_readdir() again.
141 * After fs_closedir() is called, the returned directory entry is no
144 * @dirs: the directory stream
145 * @return the next directory entry (only valid until next fs_readdir() or
146 * fs_closedir() call, do not attempt to free()) or NULL if the end of
147 * the directory is reached.
149 struct fs_dirent *fs_readdir(struct fs_dir_stream *dirs);
152 * fs_closedir - close a directory stream
154 * @dirs: the directory stream
156 void fs_closedir(struct fs_dir_stream *dirs);
159 * Common implementation for various filesystem commands, optionally limited
160 * to a specific filesystem type via the fstype parameter.
162 int do_size(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
164 int do_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
166 int do_ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
168 int file_exists(const char *dev_type, const char *dev_part, const char *file,
170 int do_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
174 * Determine the UUID of the specified filesystem and print it. Optionally it is
175 * possible to store the UUID directly in env.
177 int do_fs_uuid(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
181 * Determine the type of the specified filesystem and print it. Optionally it is
182 * possible to store the type directly in env.
184 int do_fs_type(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);