fs-state.h

   1 /*
   2  * Copyright (C) 2014 John Crispin <blogic@openwrt.org>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU Lesser General Public License version 2.1
   6  * as published by the Free Software Foundation
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13
  14 #ifndef _FS_STATE_H__
  15 #define _FS_STATE_H__
  16
  17 #include <libubox/list.h>
  18 #include <libubox/blob.h>
  19
  20 enum {
  21         FS_NONE,
  22         FS_SNAPSHOT,
  23         FS_JFFS2,
  24         FS_DEADCODE,
  25 };
  26
  27 typedef int (*backend_cli_t)(int argc, char **argv);
  28 typedef int (*backend_mount_t)(void);
  29 typedef int (*backend_info_t)(void);
  30
  31 extern char const *extroot_prefix;
  32
  33 struct backend_handler
  34 {
  35         char            *name;
  36         char            *desc;
  37         backend_cli_t   cli;
  38 };
  39
  40 struct backend
  41 {
  42         struct list_head        list;
  43         char                    *name;
  44         char                    *desc;
  45         int                     num_handlers;
  46         backend_cli_t           cli;
  47         backend_mount_t         mount;
  48         backend_info_t          info;
  49         struct backend_handler  *handlers;
  50 };
  51
  52 void register_backend(struct backend *);
  53 struct backend* find_backend(char *);
  54 int backend_mount(char *name);
  55
  56 #define BACKEND(x)                                      \
  57         static void __attribute__((constructor))        \
  58         register_##x(void) {                            \
  59                 register_backend(&x);                   \
  60         }
  61
  62 int mount_move(char *oldroot, char *newroot, char *dir);
  63 int pivot(char *new, char *old);
  64 int fopivot(char *rw_root, char *ro_root);
  65 int ramoverlay(void);
  66
  67 int find_overlay_mount(char *overlay);
  68 char* find_mount(char *mp);
  69 char* find_mount_point(char *block, char *fs);
  70 int find_filesystem(char *fs);
  71 int find_mtd_block(char *name, char *part, int plen);
  72 int find_mtd_char(char *name, char *part, int plen);
  73
  74 int jffs2_ready(char *mtd);
  75 int jffs2_switch(int argc, char **argv);
  76
  77 int handle_whiteout(const char *dir);
  78 void foreachdir(const char *dir, int (*cb)(const char*));
  79
  80 #endif