LXR linux/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
  12struct super_block;
  13struct file_system_type;
  14struct linux_binprm;
  15struct path;
  16struct mount;
  17
  18/*
  19 * block_dev.c
  20 */
  21#ifdef CONFIG_BLOCK
  22extern void __init bdev_cache_init(void);
  23
  24extern int __sync_blockdev(struct block_device *bdev, int wait);
  25
  26#else
  27static inline void bdev_cache_init(void)
  28{
  29}
  30
  31static inline int __sync_blockdev(struct block_device *bdev, int wait)
  32{
  33        return 0;
  34}
  35#endif
  36
  37/*
  38 * buffer.c
  39 */
  40extern void guard_bio_eod(int rw, struct bio *bio);
  41
  42/*
  43 * char_dev.c
  44 */
  45extern void __init chrdev_init(void);
  46
  47/*
  48 * namei.c
  49 */
  50extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *);
  51extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
  52                           const char *, unsigned int, struct path *);
  53
  54/*
  55 * namespace.c
  56 */
  57extern int copy_mount_options(const void __user *, unsigned long *);
  58extern char *copy_mount_string(const void __user *);
  59
  60extern struct vfsmount *lookup_mnt(struct path *);
  61extern int finish_automount(struct vfsmount *, struct path *);
  62
  63extern int sb_prepare_remount_readonly(struct super_block *);
  64
  65extern void __init mnt_init(void);
  66
  67extern int __mnt_want_write(struct vfsmount *);
  68extern int __mnt_want_write_file(struct file *);
  69extern void __mnt_drop_write(struct vfsmount *);
  70extern void __mnt_drop_write_file(struct file *);
  71
  72/*
  73 * fs_struct.c
  74 */
  75extern void chroot_fs_refs(const struct path *, const struct path *);
  76
  77/*
  78 * file_table.c
  79 */
  80extern struct file *get_empty_filp(void);
  81
  82/*
  83 * super.c
  84 */
  85extern int do_remount_sb(struct super_block *, int, void *, int);
  86extern bool grab_super_passive(struct super_block *sb);
  87extern struct dentry *mount_fs(struct file_system_type *,
  88                               int, const char *, void *);
  89extern struct super_block *user_get_super(dev_t);
  90
  91/*
  92 * open.c
  93 */
  94struct open_flags {
  95        int open_flag;
  96        umode_t mode;
  97        int acc_mode;
  98        int intent;
  99        int lookup_flags;
 100};
 101extern struct file *do_filp_open(int dfd, struct filename *pathname,
 102                const struct open_flags *op);
 103extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
 104                const char *, const struct open_flags *);
 105
 106extern long do_handle_open(int mountdirfd,
 107                           struct file_handle __user *ufh, int open_flag);
 108extern int open_check_o_direct(struct file *f);
 109
 110/*
 111 * inode.c
 112 */
 113extern spinlock_t inode_sb_list_lock;
 114extern long prune_icache_sb(struct super_block *sb, unsigned long nr_to_scan,
 115                            int nid);
 116extern void inode_add_lru(struct inode *inode);
 117
 118/*
 119 * fs-writeback.c
 120 */
 121extern void inode_wb_list_del(struct inode *inode);
 122
 123extern long get_nr_dirty_inodes(void);
 124extern void evict_inodes(struct super_block *);
 125extern int invalidate_inodes(struct super_block *, bool);
 126
 127/*
 128 * dcache.c
 129 */
 130extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
 131extern int d_set_mounted(struct dentry *dentry);
 132extern long prune_dcache_sb(struct super_block *sb, unsigned long nr_to_scan,
 133                            int nid);
 134
 135/*
 136 * read_write.c
 137 */
 138extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
 139
 140/*
 141 * pipe.c
 142 */
 143extern const struct file_operations pipefifo_fops;
 144
 145/*
 146 * fs_pin.c
 147 */
 148extern void sb_pin_kill(struct super_block *sb);
 149extern void mnt_pin_kill(struct mount *m);
 150
 151/*
 152 * fs/nsfs.c
 153 */
 154extern struct dentry_operations ns_dentry_operations;
 155