/*
* Copyright ( c ) 2012 , NVIDIA CORPORATION . All rights reserved .
*
* SPDX - License - Identifier : GPL - 2.0
*/
# 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
/*
* 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 */
