arch/all-pc/boot/grub2-aros/include/grub/fs.h

   1 /* fs.h - filesystem manager */
   2 /*
   3  *  GRUB  --  GRand Unified Bootloader
   4  *  Copyright (C) 2002,2003,2004,2007,2008,2009  Free Software Foundation, Inc.
   5  *
   6  *  GRUB is free software: you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation, either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  GRUB is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #ifndef GRUB_FS_HEADER
  21 #define GRUB_FS_HEADER  1
  22
  23 #include <grub/device.h>
  24 #include <grub/symbol.h>
  25 #include <grub/types.h>
  26
  27 #include <grub/list.h>
  28 /* For embedding types.  */
  29 #ifdef GRUB_UTIL
  30 #include <grub/partition.h>
  31 #endif
  32
  33 /* Forward declaration is required, because of mutual reference.  */
  34 struct grub_file;
  35
  36 struct grub_dirhook_info
  37 {
  38   unsigned dir:1;
  39   unsigned mtimeset:1;
  40   unsigned case_insensitive:1;
  41   unsigned inodeset:1;
  42   grub_int32_t mtime;
  43   grub_uint64_t inode;
  44 };
  45
  46 typedef int (*grub_fs_dir_hook_t) (const char *filename,
  47                                    const struct grub_dirhook_info *info,
  48                                    void *data);
  49
  50 /* Filesystem descriptor.  */
  51 struct grub_fs
  52 {
  53   /* The next filesystem.  */
  54   struct grub_fs *next;
  55   struct grub_fs **prev;
  56
  57   /* My name.  */
  58   const char *name;
  59
  60   /* Call HOOK with each file under DIR.  */
  61   grub_err_t (*dir) (grub_device_t device, const char *path,
  62                      grub_fs_dir_hook_t hook, void *hook_data);
  63
  64   /* Open a file named NAME and initialize FILE.  */
  65   grub_err_t (*open) (struct grub_file *file, const char *name);
  66
  67   /* Read LEN bytes data from FILE into BUF.  */
  68   grub_ssize_t (*read) (struct grub_file *file, char *buf, grub_size_t len);
  69
  70   /* Close the file FILE.  */
  71   grub_err_t (*close) (struct grub_file *file);
  72
  73   /* Return the label of the device DEVICE in LABEL.  The label is
  74      returned in a grub_malloc'ed buffer and should be freed by the
  75      caller.  */
  76   grub_err_t (*label) (grub_device_t device, char **label);
  77
  78   /* Return the uuid of the device DEVICE in UUID.  The uuid is
  79      returned in a grub_malloc'ed buffer and should be freed by the
  80      caller.  */
  81   grub_err_t (*uuid) (grub_device_t device, char **uuid);
  82
  83   /* Get writing time of filesystem. */
  84   grub_err_t (*mtime) (grub_device_t device, grub_int32_t *timebuf);
  85
  86 #ifdef GRUB_UTIL
  87   /* Determine sectors available for embedding.  */
  88   grub_err_t (*embed) (grub_device_t device, unsigned int *nsectors,
  89                        unsigned int max_nsectors,
  90                        grub_embed_type_t embed_type,
  91                        grub_disk_addr_t **sectors);
  92
  93   /* Whether this filesystem reserves first sector for DOS-style boot.  */
  94   int reserved_first_sector;
  95
  96   /* Whether blocklist installs have a chance to work.  */
  97   int blocklist_install;
  98 #endif
  99 };
 100 typedef struct grub_fs *grub_fs_t;
 101
 102 /* This is special, because block lists are not files in usual sense.  */
 103 extern struct grub_fs grub_fs_blocklist;
 104
 105 /* This hook is used to automatically load filesystem modules.
 106    If this hook loads a module, return non-zero. Otherwise return zero.
 107    The newly loaded filesystem is assumed to be inserted into the head of
 108    the linked list GRUB_FS_LIST through the function grub_fs_register.  */
 109 typedef int (*grub_fs_autoload_hook_t) (void);
 110 extern grub_fs_autoload_hook_t EXPORT_VAR(grub_fs_autoload_hook);
 111 extern grub_fs_t EXPORT_VAR (grub_fs_list);
 112
 113 #ifndef GRUB_LST_GENERATOR
 114 static inline void
 115 grub_fs_register (grub_fs_t fs)
 116 {
 117   grub_list_push (GRUB_AS_LIST_P (&grub_fs_list), GRUB_AS_LIST (fs));
 118 }
 119 #endif
 120
 121 static inline void
 122 grub_fs_unregister (grub_fs_t fs)
 123 {
 124   grub_list_remove (GRUB_AS_LIST (fs));
 125 }
 126
 127 #define FOR_FILESYSTEMS(var) FOR_LIST_ELEMENTS((var), (grub_fs_list))
 128
 129 grub_fs_t EXPORT_FUNC(grub_fs_probe) (grub_device_t device);
 130
 131 #endif /* ! GRUB_FS_HEADER */