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 #include <linux/lglock.h>
  13
  14 struct super_block;
  15 struct linux_binprm;
  16 struct path;
  17
  18 /*
  19  * block_dev.c
  20  */
  21 #ifdef CONFIG_BLOCK
  22 extern struct super_block *blockdev_superblock;
  23 extern void __init bdev_cache_init(void);
  24
  25 static inline int sb_is_blkdev_sb(struct super_block *sb)
  26 {
  27         return sb == blockdev_superblock;
  28 }
  29
  30 extern int __sync_blockdev(struct block_device *bdev, int wait);
  31
  32 #else
  33 static inline void bdev_cache_init(void)
  34 {
  35 }
  36
  37 static inline int sb_is_blkdev_sb(struct super_block *sb)
  38 {
  39         return 0;
  40 }
  41
  42 static inline int __sync_blockdev(struct block_device *bdev, int wait)
  43 {
  44         return 0;
  45 }
  46 #endif
  47
  48 /*
  49  * char_dev.c
  50  */
  51 extern void __init chrdev_init(void);
  52
  53 /*
  54  * exec.c
  55  */
  56 extern int check_unsafe_exec(struct linux_binprm *);
  57
  58 /*
  59  * namespace.c
  60  */
  61 extern int copy_mount_options(const void __user *, unsigned long *);
  62 extern int copy_mount_string(const void __user *, char **);
  63
  64 extern void free_vfsmnt(struct vfsmount *);
  65 extern struct vfsmount *alloc_vfsmnt(const char *);
  66 extern struct vfsmount *__lookup_mnt(struct vfsmount *, struct dentry *, int);
  67 extern void mnt_set_mountpoint(struct vfsmount *, struct dentry *,
  68                                 struct vfsmount *);
  69 extern void release_mounts(struct list_head *);
  70 extern void umount_tree(struct vfsmount *, int, struct list_head *);
  71 extern struct vfsmount *copy_tree(struct vfsmount *, struct dentry *, int);
  72
  73 extern void __init mnt_init(void);
  74
  75 DECLARE_BRLOCK(vfsmount_lock);
  76
  77
  78 /*
  79  * fs_struct.c
  80  */
  81 extern void chroot_fs_refs(struct path *, struct path *);
  82
  83 /*
  84  * file_table.c
  85  */
  86 extern void file_sb_list_add(struct file *f, struct super_block *sb);
  87 extern void file_sb_list_del(struct file *f);
  88 extern void mark_files_ro(struct super_block *);
  89 extern struct file *get_empty_filp(void);
  90
  91 /*
  92  * super.c
  93  */
  94 extern int do_remount_sb(struct super_block *, int, void *, int);
  95 extern void __put_super(struct super_block *sb);
  96 extern void put_super(struct super_block *sb);
  97
  98 /*
  99  * open.c
 100  */
 101 struct nameidata;
 102 extern struct file *nameidata_to_filp(struct nameidata *);
 103 extern void release_open_intent(struct nameidata *);