fs/internal.h

   1 /* fs/ internal definitions
   2  *
   3  * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
   4  * Written by David Howells (dhowells@redhat.com)
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  */
  11
  12 struct super_block;
  13
  14 /*
  15  * block_dev.c
  16  */
  17 #ifdef CONFIG_BLOCK
  18 extern struct super_block *blockdev_superblock;
  19 extern void __init bdev_cache_init(void);
  20
  21 static inline int sb_is_blkdev_sb(struct super_block *sb)
  22 {
  23         return sb == blockdev_superblock;
  24 }
  25
  26 #else
  27 static inline void bdev_cache_init(void)
  28 {
  29 }
  30
  31 static inline int sb_is_blkdev_sb(struct super_block *sb)
  32 {
  33         return 0;
  34 }
  35 #endif
  36
  37 /*
  38  * char_dev.c
  39  */
  40 extern void __init chrdev_init(void);
  41
  42 /*
  43  * namespace.c
  44  */
  45 extern int copy_mount_options(const void __user *, unsigned long *);
  46
  47 extern void free_vfsmnt(struct vfsmount *);
  48 extern struct vfsmount *alloc_vfsmnt(const char *);
  49 extern struct vfsmount *__lookup_mnt(struct vfsmount *, struct dentry *, int);
  50 extern void mnt_set_mountpoint(struct vfsmount *, struct dentry *,
  51                                 struct vfsmount *);
  52 extern void release_mounts(struct list_head *);
  53 extern void umount_tree(struct vfsmount *, int, struct list_head *);
  54 extern struct vfsmount *copy_tree(struct vfsmount *, struct dentry *, int);
  55
  56 extern void __init mnt_init(void);