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;
  18
  19/*
  20 * block_dev.c
  21 */
  22#ifdef CONFIG_BLOCK
  23extern struct super_block *blockdev_superblock;
  24extern void __init bdev_cache_init(void);
  25
  26static inline int sb_is_blkdev_sb(struct super_block *sb)
  27{
  28        return sb == blockdev_superblock;
  29}
  30
  31extern int __sync_blockdev(struct block_device *bdev, int wait);
  32
  33#else
  34static inline void bdev_cache_init(void)
  35{
  36}
  37
  38static inline int sb_is_blkdev_sb(struct super_block *sb)
  39{
  40        return 0;
  41}
  42
  43static inline int __sync_blockdev(struct block_device *bdev, int wait)
  44{
  45        return 0;
  46}
  47#endif
  48
  49/*
  50 * char_dev.c
  51 */
  52extern void __init chrdev_init(void);
  53
  54/*
  55 * exec.c
  56 */
  57extern int check_unsafe_exec(struct linux_binprm *);
  58
  59/*
  60 * namespace.c
  61 */
  62extern int copy_mount_options(const void __user *, unsigned long *);
  63extern int copy_mount_string(const void __user *, char **);
  64
  65extern unsigned int mnt_get_count(struct vfsmount *mnt);
  66extern struct vfsmount *__lookup_mnt(struct vfsmount *, struct dentry *, int);
  67extern struct vfsmount *lookup_mnt(struct path *);
  68extern void mnt_set_mountpoint(struct vfsmount *, struct dentry *,
  69                                struct vfsmount *);
  70extern void release_mounts(struct list_head *);
  71extern void umount_tree(struct vfsmount *, int, struct list_head *);
  72extern struct vfsmount *copy_tree(struct vfsmount *, struct dentry *, int);
  73extern int finish_automount(struct vfsmount *, struct path *);
  74
  75extern void mnt_make_longterm(struct vfsmount *);
  76extern void mnt_make_shortterm(struct vfsmount *);
  77
  78extern void __init mnt_init(void);
  79
  80DECLARE_BRLOCK(vfsmount_lock);
  81
  82
  83/*
  84 * fs_struct.c
  85 */
  86extern void chroot_fs_refs(struct path *, struct path *);
  87
  88/*
  89 * file_table.c
  90 */
  91extern void file_sb_list_add(struct file *f, struct super_block *sb);
  92extern void file_sb_list_del(struct file *f);
  93extern void mark_files_ro(struct super_block *);
  94extern struct file *get_empty_filp(void);
  95
  96/*
  97 * super.c
  98 */
  99extern int do_remount_sb(struct super_block *, int, void *, int);
 100extern bool grab_super_passive(struct super_block *sb);
 101extern void __put_super(struct super_block *sb);
 102extern void put_super(struct super_block *sb);
 103extern struct dentry *mount_fs(struct file_system_type *,
 104                               int, const char *, void *);
 105
 106/*
 107 * open.c
 108 */
 109struct nameidata;
 110extern struct file *nameidata_to_filp(struct nameidata *);
 111extern void release_open_intent(struct nameidata *);
 112struct open_flags {
 113        int open_flag;
 114        int mode;
 115        int acc_mode;
 116        int intent;
 117};
 118extern struct file *do_filp_open(int dfd, const char *pathname,
 119                const struct open_flags *op, int lookup_flags);
 120extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
 121                const char *, const struct open_flags *, int lookup_flags);
 122
 123extern long do_handle_open(int mountdirfd,
 124                           struct file_handle __user *ufh, int open_flag);
 125
 126/*
 127 * inode.c
 128 */
 129extern spinlock_t inode_sb_list_lock;
 130
 131/*
 132 * fs-writeback.c
 133 */
 134extern void inode_wb_list_del(struct inode *inode);
 135
 136extern int get_nr_dirty_inodes(void);
 137extern void evict_inodes(struct super_block *);
 138extern int invalidate_inodes(struct super_block *, bool);
 139
 140/*
 141 * dcache.c
 142 */
 143extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
 144
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