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