include/fs.h

   1 /*
   2  * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0
   5  */
   6 #ifndef _FS_H
   7 #define _FS_H
   8
   9 #include <common.h>
  10
  11 #define FS_TYPE_ANY     0
  12 #define FS_TYPE_FAT     1
  13 #define FS_TYPE_EXT     2
  14 #define FS_TYPE_SANDBOX 3
  15 #define FS_TYPE_UBIFS   4
  16
  17 /*
  18  * Tell the fs layer which block device an partition to use for future
  19  * commands. This also internally identifies the filesystem that is present
  20  * within the partition. The identification process may be limited to a
  21  * specific filesystem type by passing FS_* in the fstype parameter.
  22  *
  23  * Returns 0 on success.
  24  * Returns non-zero if there is an error accessing the disk or partition, or
  25  * no known filesystem type could be recognized on it.
  26  */
  27 int fs_set_blk_dev(const char *ifname, const char *dev_part_str, int fstype);
  28
  29 /*
  30  * Print the list of files on the partition previously set by fs_set_blk_dev(),
  31  * in directory "dirname".
  32  *
  33  * Returns 0 on success. Returns non-zero on error.
  34  */
  35 int fs_ls(const char *dirname);
  36
  37 /*
  38  * Determine whether a file exists
  39  *
  40  * Returns 1 if the file exists, 0 if it doesn't exist.
  41  */
  42 int fs_exists(const char *filename);
  43
  44 /*
  45  * fs_size - Determine a file's size
  46  *
  47  * @filename: Name of the file
  48  * @size: Size of file
  49  * @return 0 if ok with valid *size, negative on error
  50  */
  51 int fs_size(const char *filename, loff_t *size);
  52
  53 /*
  54  * fs_read - Read file from the partition previously set by fs_set_blk_dev()
  55  * Note that not all filesystem types support either/both offset!=0 or len!=0.
  56  *
  57  * @filename: Name of file to read from
  58  * @addr: The address to read into
  59  * @offset: The offset in file to read from
  60  * @len: The number of bytes to read. Maybe 0 to read entire file
  61  * @actread: Returns the actual number of bytes read
  62  * @return 0 if ok with valid *actread, -1 on error conditions
  63  */
  64 int fs_read(const char *filename, ulong addr, loff_t offset, loff_t len,
  65             loff_t *actread);
  66
  67 /*
  68  * fs_write - Write file to the partition previously set by fs_set_blk_dev()
  69  * Note that not all filesystem types support offset!=0.
  70  *
  71  * @filename: Name of file to read from
  72  * @addr: The address to read into
  73  * @offset: The offset in file to read from. Maybe 0 to write to start of file
  74  * @len: The number of bytes to write
  75  * @actwrite: Returns the actual number of bytes written
  76  * @return 0 if ok with valid *actwrite, -1 on error conditions
  77  */
  78 int fs_write(const char *filename, ulong addr, loff_t offset, loff_t len,
  79              loff_t *actwrite);
  80
  81 /*
  82  * Common implementation for various filesystem commands, optionally limited
  83  * to a specific filesystem type via the fstype parameter.
  84  */
  85 int do_size(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
  86                 int fstype);
  87 int do_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
  88                 int fstype);
  89 int do_ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
  90                 int fstype);
  91 int file_exists(const char *dev_type, const char *dev_part, const char *file,
  92                 int fstype);
  93 int do_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
  94                 int fstype);
  95
  96 /*
  97  * Determine the UUID of the specified filesystem and print it. Optionally it is
  98  * possible to store the UUID directly in env.
  99  */
 100 int do_fs_uuid(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
 101                 int fstype);
 102
 103 /*
 104  * Determine the type of the specified filesystem and print it. Optionally it is
 105  * possible to store the type directly in env.
 106  */
 107 int do_fs_type(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
 108
 109 #endif /* _FS_H */