linux/fs/internal.h
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   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
  14struct super_block;
  15struct file_system_type;
  16struct linux_binprm;
  17struct path;
  18struct mount;
  19
  20/*
  21 * block_dev.c
  22 */
  23#ifdef CONFIG_BLOCK
  24extern void __init bdev_cache_init(void);
  25
  26extern int __sync_blockdev(struct block_device *bdev, int wait);
  27
  28#else
  29static inline void bdev_cache_init(void)
  30{
  31}
  32
  33static inline int __sync_blockdev(struct block_device *bdev, int wait)
  34{
  35        return 0;
  36}
  37#endif
  38
  39/*
  40 * char_dev.c
  41 */
  42extern void __init chrdev_init(void);
  43
  44/*
  45 * namespace.c
  46 */
  47extern int copy_mount_options(const void __user *, unsigned long *);
  48extern int copy_mount_string(const void __user *, char **);
  49
  50extern struct vfsmount *lookup_mnt(struct path *);
  51extern int finish_automount(struct vfsmount *, struct path *);
  52
  53extern void mnt_make_longterm(struct vfsmount *);
  54extern void mnt_make_shortterm(struct vfsmount *);
  55extern int sb_prepare_remount_readonly(struct super_block *);
  56
  57extern void __init mnt_init(void);
  58
  59extern struct lglock vfsmount_lock;
  60
  61
  62/*
  63 * fs_struct.c
  64 */
  65extern void chroot_fs_refs(struct path *, struct path *);
  66
  67/*
  68 * file_table.c
  69 */
  70extern void file_sb_list_add(struct file *f, struct super_block *sb);
  71extern void file_sb_list_del(struct file *f);
  72extern void mark_files_ro(struct super_block *);
  73extern struct file *get_empty_filp(void);
  74
  75/*
  76 * super.c
  77 */
  78extern int do_remount_sb(struct super_block *, int, void *, int);
  79extern bool grab_super_passive(struct super_block *sb);
  80extern struct dentry *mount_fs(struct file_system_type *,
  81                               int, const char *, void *);
  82extern struct super_block *user_get_super(dev_t);
  83
  84/*
  85 * open.c
  86 */
  87struct nameidata;
  88extern struct file *nameidata_to_filp(struct nameidata *);
  89extern void release_open_intent(struct nameidata *);
  90struct open_flags {
  91        int open_flag;
  92        umode_t mode;
  93        int acc_mode;
  94        int intent;
  95};
  96extern struct file *do_filp_open(int dfd, const char *pathname,
  97                const struct open_flags *op, int lookup_flags);
  98extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
  99                const char *, const struct open_flags *, int lookup_flags);
 100
 101extern long do_handle_open(int mountdirfd,
 102                           struct file_handle __user *ufh, int open_flag);
 103extern int open_check_o_direct(struct file *f);
 104
 105/*
 106 * inode.c
 107 */
 108extern spinlock_t inode_sb_list_lock;
 109
 110/*
 111 * fs-writeback.c
 112 */
 113extern void inode_wb_list_del(struct inode *inode);
 114
 115extern int get_nr_dirty_inodes(void);
 116extern void evict_inodes(struct super_block *);
 117extern int invalidate_inodes(struct super_block *, bool);
 118
 119/*
 120 * dcache.c
 121 */
 122extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
 123
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