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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
*/
#ifndef _FS_H
#define _FS_H
#include <common.h>
#define FS_TYPE_ANY 0
#define FS_TYPE_FAT 1
#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
* commands. This also internally identifies the filesystem that is present
* within the partition. The identification process may be limited to a
* specific filesystem type by passing FS_* in the fstype parameter.
*
* Returns 0 on success.
* Returns non-zero if there is an error accessing the disk or partition, or
* no known filesystem type could be recognized on it.
*/
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_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".
*
* Returns 0 on success. Returns non-zero on error.
*/
int fs_ls(const char *dirname);
/*
* Determine whether a file exists
*
* Returns 1 if the file exists, 0 if it doesn't exist.
*/
int fs_exists(const char *filename);
/*
* fs_size - Determine a file's size
*
* @filename: Name of the file
* @size: Size of file
* @return 0 if ok with valid *size, negative on error
*/
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.
*
* @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
*/
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.
*
* @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
*/
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);
/*
* Common implementation for various filesystem commands, optionally limited
* to a specific filesystem type via the fstype parameter.
*/
int do_size(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
int fstype);
int do_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
int fstype);
int do_ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
int fstype);
int file_exists(const char *dev_type, const char *dev_part, const char *file,
int fstype);
int do_save(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
* possible to store the UUID directly in env.
*/
int do_fs_uuid(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
int fstype);
/*
* Determine the type of the specified filesystem and print it. Optionally it is
* possible to store the type directly in env.
*/
int do_fs_type(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
#endif /* _FS_H */
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