2 * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
4 * SPDX-License-Identifier: GPL-2.0
14 #define FS_TYPE_SANDBOX 3
15 #define FS_TYPE_UBIFS 4
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 * Print the list of files on the partition previously set by fs_set_blk_dev(),
42 * in directory "dirname".
44 * Returns 0 on success. Returns non-zero on error.
46 int fs_ls(const char *dirname);
49 * Determine whether a file exists
51 * Returns 1 if the file exists, 0 if it doesn't exist.
53 int fs_exists(const char *filename);
56 * fs_size - Determine a file's size
58 * @filename: Name of the file
60 * @return 0 if ok with valid *size, negative on error
62 int fs_size(const char *filename, loff_t *size);
65 * fs_read - Read file from the partition previously set by fs_set_blk_dev()
66 * Note that not all filesystem types support either/both offset!=0 or len!=0.
68 * @filename: Name of file to read from
69 * @addr: The address to read into
70 * @offset: The offset in file to read from
71 * @len: The number of bytes to read. Maybe 0 to read entire file
72 * @actread: Returns the actual number of bytes read
73 * @return 0 if ok with valid *actread, -1 on error conditions
75 int fs_read(const char *filename, ulong addr, loff_t offset, loff_t len,
79 * fs_write - Write file to the partition previously set by fs_set_blk_dev()
80 * Note that not all filesystem types support offset!=0.
82 * @filename: Name of file to read from
83 * @addr: The address to read into
84 * @offset: The offset in file to read from. Maybe 0 to write to start of file
85 * @len: The number of bytes to write
86 * @actwrite: Returns the actual number of bytes written
87 * @return 0 if ok with valid *actwrite, -1 on error conditions
89 int fs_write(const char *filename, ulong addr, loff_t offset, loff_t len,
93 * Directory entry types, matches the subset of DT_x in posix readdir()
94 * which apply to u-boot.
96 #define FS_DT_DIR 4 /* directory */
97 #define FS_DT_REG 8 /* regular file */
98 #define FS_DT_LNK 10 /* symbolic link */
101 * A directory entry, returned by fs_readdir(). Returns information
102 * about the file/directory at the current directory entry position.
105 unsigned type; /* one of FS_DT_x (not a mask) */
106 loff_t size; /* size in bytes */
110 /* Note: fs_dir_stream should be treated as opaque to the user of fs layer */
111 struct fs_dir_stream {
112 /* private to fs. layer: */
113 struct blk_desc *desc;
118 * fs_opendir - Open a directory
120 * @filename: the path to directory to open
121 * @return a pointer to the directory stream or NULL on error and errno
124 struct fs_dir_stream *fs_opendir(const char *filename);
127 * fs_readdir - Read the next directory entry in the directory stream.
129 * Works in an analogous way to posix readdir(). The previously returned
130 * directory entry is no longer valid after calling fs_readdir() again.
131 * After fs_closedir() is called, the returned directory entry is no
134 * @dirs: the directory stream
135 * @return the next directory entry (only valid until next fs_readdir() or
136 * fs_closedir() call, do not attempt to free()) or NULL if the end of
137 * the directory is reached.
139 struct fs_dirent *fs_readdir(struct fs_dir_stream *dirs);
142 * fs_closedir - close a directory stream
144 * @dirs: the directory stream
146 void fs_closedir(struct fs_dir_stream *dirs);
149 * Common implementation for various filesystem commands, optionally limited
150 * to a specific filesystem type via the fstype parameter.
152 int do_size(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
154 int do_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
156 int do_ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
158 int file_exists(const char *dev_type, const char *dev_part, const char *file,
160 int do_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
164 * Determine the UUID of the specified filesystem and print it. Optionally it is
165 * possible to store the UUID directly in env.
167 int do_fs_uuid(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
171 * Determine the type of the specified filesystem and print it. Optionally it is
172 * possible to store the type directly in env.
174 int do_fs_type(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);