+/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
- *
- * SPDX-License-Identifier: GPL-2.0
*/
#ifndef _FS_H
#define _FS_H
#define FS_TYPE_EXT 2
#define FS_TYPE_SANDBOX 3
#define FS_TYPE_UBIFS 4
+#define FS_TYPE_BTRFS 5
/*
* Tell the fs layer which block device an partition to use for future
*/
int fs_set_blk_dev(const char *ifname, const char *dev_part_str, int fstype);
+/*
+ * fs_set_blk_dev_with_part - Set current block device + partition
+ *
+ * Similar to fs_set_blk_dev(), but useful for cases where you already
+ * know the blk_desc and part number.
+ *
+ * Returns 0 on success.
+ * Returns non-zero if invalid partition or error accessing the disk.
+ */
+int fs_set_blk_dev_with_part(struct blk_desc *desc, int part);
+
+/**
+ * fs_close() - Unset current block device and partition
+ *
+ * fs_close() closes the connection to a file system opened with either
+ * fs_set_blk_dev() or fs_set_dev_with_part().
+ *
+ * Many file functions implicitly call fs_close(), e.g. fs_closedir(),
+ * fs_exist(), fs_ln(), fs_ls(), fs_mkdir(), fs_read(), fs_size(), fs_write(),
+ * fs_unlink().
+ */
+void fs_close(void);
+
+/**
+ * fs_get_type() - Get type of current filesystem
+ *
+ * Return: filesystem type
+ *
+ * Returns filesystem type representing the current filesystem, or
+ * FS_TYPE_ANY for any unrecognised filesystem.
+ */
+int fs_get_type(void);
+
+/**
+ * fs_get_type_name() - Get type of current filesystem
+ *
+ * Return: Pointer to filesystem name
+ *
+ * Returns a string describing the current filesystem, or the sentinel
+ * "unsupported" for any unrecognised filesystem.
+ */
+const char *fs_get_type_name(void);
+
/*
* Print the list of files on the partition previously set by fs_set_blk_dev(),
* in directory "dirname".
*/
int fs_size(const char *filename, loff_t *size);
-/*
- * fs_read - Read file from the partition previously set by fs_set_blk_dev()
- * Note that not all filesystem types support either/both offset!=0 or len!=0.
+/**
+ * fs_read() - read file from the partition previously set by fs_set_blk_dev()
+ *
+ * Note that not all filesystem drivers support either or both of offset != 0
+ * and len != 0.
*
- * @filename: Name of file to read from
- * @addr: The address to read into
- * @offset: The offset in file to read from
- * @len: The number of bytes to read. Maybe 0 to read entire file
- * @actread: Returns the actual number of bytes read
- * @return 0 if ok with valid *actread, -1 on error conditions
+ * @filename: full path of the file to read from
+ * @addr: address of the buffer to write to
+ * @offset: offset in the file from where to start reading
+ * @len: the number of bytes to read. Use 0 to read entire file.
+ * @actread: returns the actual number of bytes read
+ * Return: 0 if OK with valid *actread, -1 on error conditions
*/
int fs_read(const char *filename, ulong addr, loff_t offset, loff_t len,
loff_t *actread);
-/*
- * fs_write - Write file to the partition previously set by fs_set_blk_dev()
- * Note that not all filesystem types support offset!=0.
+/**
+ * fs_write() - write file to the partition previously set by fs_set_blk_dev()
+ *
+ * Note that not all filesystem drivers support offset != 0.
*
- * @filename: Name of file to read from
- * @addr: The address to read into
- * @offset: The offset in file to read from. Maybe 0 to write to start of file
- * @len: The number of bytes to write
- * @actwrite: Returns the actual number of bytes written
- * @return 0 if ok with valid *actwrite, -1 on error conditions
+ * @filename: full path of the file to write to
+ * @addr: address of the buffer to read from
+ * @offset: offset in the file from where to start writing
+ * @len: the number of bytes to write
+ * @actwrite: returns the actual number of bytes written
+ * Return: 0 if OK with valid *actwrite, -1 on error conditions
*/
int fs_write(const char *filename, ulong addr, loff_t offset, loff_t len,
loff_t *actwrite);
+/*
+ * Directory entry types, matches the subset of DT_x in posix readdir()
+ * which apply to u-boot.
+ */
+#define FS_DT_DIR 4 /* directory */
+#define FS_DT_REG 8 /* regular file */
+#define FS_DT_LNK 10 /* symbolic link */
+
+/*
+ * A directory entry, returned by fs_readdir(). Returns information
+ * about the file/directory at the current directory entry position.
+ */
+struct fs_dirent {
+ unsigned type; /* one of FS_DT_x (not a mask) */
+ loff_t size; /* size in bytes */
+ char name[256];
+};
+
+/* Note: fs_dir_stream should be treated as opaque to the user of fs layer */
+struct fs_dir_stream {
+ /* private to fs. layer: */
+ struct blk_desc *desc;
+ int part;
+};
+
+/*
+ * fs_opendir - Open a directory
+ *
+ * @filename: the path to directory to open
+ * @return a pointer to the directory stream or NULL on error and errno
+ * set appropriately
+ */
+struct fs_dir_stream *fs_opendir(const char *filename);
+
+/*
+ * fs_readdir - Read the next directory entry in the directory stream.
+ *
+ * Works in an analogous way to posix readdir(). The previously returned
+ * directory entry is no longer valid after calling fs_readdir() again.
+ * After fs_closedir() is called, the returned directory entry is no
+ * longer valid.
+ *
+ * @dirs: the directory stream
+ * @return the next directory entry (only valid until next fs_readdir() or
+ * fs_closedir() call, do not attempt to free()) or NULL if the end of
+ * the directory is reached.
+ */
+struct fs_dirent *fs_readdir(struct fs_dir_stream *dirs);
+
+/*
+ * fs_closedir - close a directory stream
+ *
+ * @dirs: the directory stream
+ */
+void fs_closedir(struct fs_dir_stream *dirs);
+
+/*
+ * fs_unlink - delete a file or directory
+ *
+ * If a given name is a directory, it will be deleted only if it's empty
+ *
+ * @filename: Name of file or directory to delete
+ * @return 0 on success, -1 on error conditions
+ */
+int fs_unlink(const char *filename);
+
+/*
+ * fs_mkdir - Create a directory
+ *
+ * @filename: Name of directory to create
+ * @return 0 on success, -1 on error conditions
+ */
+int fs_mkdir(const char *filename);
+
/*
* Common implementation for various filesystem commands, optionally limited
* to a specific filesystem type via the fstype parameter.
int fstype);
int do_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
int fstype);
+int do_rm(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
+ int fstype);
+int do_mkdir(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
+ int fstype);
+int do_ln(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
+ int fstype);
/*
* Determine the UUID of the specified filesystem and print it. Optionally it is
projects / oweals / u-boot.git / blobdiff