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 struct linux_binprm;
  14 struct path;
  15
  16 /*
  17  * block_dev.c
  18  */
  19 #ifdef CONFIG_BLOCK
  20 extern struct super_block *blockdev_superblock;
  21 extern void __init bdev_cache_init(void);
  22
  23 static inline int sb_is_blkdev_sb(struct super_block *sb)
  24 {
  25         return sb == blockdev_superblock;
  26 }
  27
  28 extern int __sync_blockdev(struct block_device *bdev, int wait);
  29
  30 #else
  31 static inline void bdev_cache_init(void)
  32 {
  33 }
  34
  35 static inline int sb_is_blkdev_sb(struct super_block *sb)
  36 {
  37         return 0;
  38 }
  39
  40 static inline int __sync_blockdev(struct block_device *bdev, int wait)
  41 {
  42         return 0;
  43 }
  44 #endif
  45
  46 /*
  47  * char_dev.c
  48  */
  49 extern void __init chrdev_init(void);
  50
  51 /*
  52  * exec.c
  53  */
  54 extern int check_unsafe_exec(struct linux_binprm *);
  55
  56 /*
  57  * namespace.c
  58  */
  59 extern int copy_mount_options(const void __user *, unsigned long *);
  60 extern int copy_mount_string(const void __user *, char **);
  61
  62 extern void free_vfsmnt(struct vfsmount *);
  63 extern struct vfsmount *alloc_vfsmnt(const char *);
  64 extern struct vfsmount *__lookup_mnt(struct vfsmount *, struct dentry *, int);
  65 extern void mnt_set_mountpoint(struct vfsmount *, struct dentry *,
  66                                 struct vfsmount *);
  67 extern void release_mounts(struct list_head *);
  68 extern void umount_tree(struct vfsmount *, int, struct list_head *);
  69 extern struct vfsmount *copy_tree(struct vfsmount *, struct dentry *, int);
  70
  71 extern void __init mnt_init(void);
  72
  73 extern spinlock_t vfsmount_lock;
  74
  75 /*
  76  * fs_struct.c
  77  */
  78 extern void chroot_fs_refs(struct path *, struct path *);
  79
  80 /*
  81  * file_table.c
  82  */
  83 extern void mark_files_ro(struct super_block *);
  84 extern struct file *get_empty_filp(void);
  85
  86 /*
  87  * super.c
  88  */
  89 extern int do_remount_sb(struct super_block *, int, void *, int);
  90
  91 /*
  92  * open.c
  93  */
  94 struct nameidata;
  95 extern struct file *nameidata_to_filp(struct nameidata *);
  96 extern void release_open_intent(struct nameidata *);