include/fs.h

   1 /*
   2  * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms and conditions of the GNU General Public License,
   6  * version 2, as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11  * more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  */
  16 #ifndef _FS_H
  17 #define _FS_H
  18
  19 #include <common.h>
  20
  21 #define FS_TYPE_ANY     0
  22 #define FS_TYPE_FAT     1
  23 #define FS_TYPE_EXT     2
  24
  25 /*
  26  * Tell the fs layer which block device an partition to use for future
  27  * commands. This also internally identifies the filesystem that is present
  28  * within the partition. The identification process may be limited to a
  29  * specific filesystem type by passing FS_* in the fstype parameter.
  30  *
  31  * Returns 0 on success.
  32  * Returns non-zero if there is an error accessing the disk or partition, or
  33  * no known filesystem type could be recognized on it.
  34  */
  35 int fs_set_blk_dev(const char *ifname, const char *dev_part_str, int fstype);
  36
  37 /*
  38  * Print the list of files on the partition previously set by fs_set_blk_dev(),
  39  * in directory "dirname".
  40  *
  41  * Returns 0 on success. Returns non-zero on error.
  42  */
  43 int fs_ls(const char *dirname);
  44
  45 /*
  46  * Read file "filename" from the partition previously set by fs_set_blk_dev(),
  47  * to address "addr", starting at byte offset "offset", and reading "len"
  48  * bytes. "offset" may be 0 to read from the start of the file. "len" may be
  49  * 0 to read the entire file. Note that not all filesystem types support
  50  * either/both offset!=0 or len!=0.
  51  *
  52  * Returns number of bytes read on success. Returns <= 0 on error.
  53  */
  54 int fs_read(const char *filename, ulong addr, int offset, int len);
  55
  56 /*
  57  * Common implementation for various filesystem commands, optionally limited
  58  * to a specific filesystem type via the fstype parameter.
  59  */
  60 int do_fsload(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
  61                 int fstype, int cmdline_base);
  62 int do_ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
  63                 int fstype);
  64
  65 #endif /* _FS_H */