include/path.h

   1 /*
   2  * Copyright (c) 2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18 #ifndef __PATH_H__
  19 #define __PATH_H__
  20
  21 #include "platform_defs.h"
  22
  23 /*
  24  * XFS Filesystem Paths
  25  *
  26  * Utility routines for iterating and searching through the list
  27  * of known mounted filesystems and project paths.
  28  */
  29
  30 #define FS_MOUNT_POINT  (1<<0)
  31 #define FS_PROJECT_PATH (1<<1)
  32 #define FS_FOREIGN      (1<<2)
  33
  34 typedef struct fs_path {
  35         char            *fs_name;       /* Data device for filesystem   */
  36         dev_t           fs_datadev;
  37         char            *fs_log;        /* External log device, if any  */
  38         dev_t           fs_logdev;
  39         char            *fs_rt;         /* Realtime device, if any      */
  40         dev_t           fs_rtdev;
  41         char            *fs_dir;        /* Directory / mount point      */
  42         uint            fs_flags;       /* FS_{MOUNT_POINT,PROJECT_PATH}*/
  43         uint            fs_prid;        /* Project ID for tree root     */
  44 } fs_path_t;
  45
  46 extern int fs_count;            /* number of entries in fs table */
  47 extern int xfs_fs_count;        /* number of xfs entries in fs table */
  48 extern fs_path_t *fs_table;     /* array of entries in fs table  */
  49 extern fs_path_t *fs_path;      /* current entry in the fs table */
  50 extern char *mtab_file;
  51
  52 extern void fs_table_initialise(int, char *[], int, char *[]);
  53 extern void fs_table_destroy(void);
  54
  55 extern void fs_table_insert_project_path(char *__dir, uint __projid);
  56
  57
  58 extern fs_path_t *fs_table_lookup(const char *__dir, uint __flags);
  59 extern fs_path_t *fs_table_lookup_mount(const char *__dir);
  60 extern fs_path_t *fs_table_lookup_blkdev(const char *bdev);
  61
  62 typedef struct fs_cursor {
  63         uint            count;          /* total count of mount entries */
  64         uint            index;          /* current position in table    */
  65         uint            flags;          /* iterator flags: mounts/trees */
  66         fs_path_t       *table;         /* local/global table pointer   */
  67         fs_path_t       local;          /* space for single-entry table */
  68 } fs_cursor_t;
  69
  70 extern void fs_cursor_initialise(char *__dir, uint __flags, fs_cursor_t *__cp);
  71 extern fs_path_t *fs_cursor_next_entry(fs_cursor_t *__cp);
  72
  73 #endif  /* __PATH_H__ */