fs.h
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/*
* Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#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
/*
* 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);
/*
* 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);
/*
* 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 */