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 * char_dev.c
  39 */
  40extern void __init chrdev_init(void);
  41
  42/*
  43 * namei.c
  44 */
  45extern int __inode_permission(struct inode *, int);
  46extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *);
  47extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
  48                           const char *, unsigned int, struct path *);
  49
  50/*
  51 * namespace.c
  52 */
  53extern int copy_mount_options(const void __user *, unsigned long *);
  54extern int copy_mount_string(const void __user *, char **);
  55
  56extern struct vfsmount *lookup_mnt(struct path *);
  57extern int finish_automount(struct vfsmount *, struct path *);
  58
  59extern int sb_prepare_remount_readonly(struct super_block *);
  60
  61extern void __init mnt_init(void);
  62
  63extern int __mnt_want_write(struct vfsmount *);
  64extern int __mnt_want_write_file(struct file *);
  65extern void __mnt_drop_write(struct vfsmount *);
  66extern void __mnt_drop_write_file(struct file *);
  67
  68/*
  69 * fs_struct.c
  70 */
  71extern void chroot_fs_refs(const struct path *, const struct path *);
  72
  73/*
  74 * file_table.c
  75 */
  76extern struct file *get_empty_filp(void);
  77
  78/*
  79 * super.c
  80 */
  81extern int do_remount_sb(struct super_block *, int, void *, int);
  82extern bool grab_super_passive(struct super_block *sb);
  83extern struct dentry *mount_fs(struct file_system_type *,
  84                               int, const char *, void *);
  85extern struct super_block *user_get_super(dev_t);
  86
  87/*
  88 * open.c
  89 */
  90struct open_flags {
  91        int open_flag;
  92        umode_t mode;
  93        int acc_mode;
  94        int intent;
  95        int lookup_flags;
  96};
  97extern struct file *do_filp_open(int dfd, struct filename *pathname,
  98                const struct open_flags *op);
  99extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
 100                const char *, const struct open_flags *);
 101
 102extern long do_handle_open(int mountdirfd,
 103                           struct file_handle __user *ufh, int open_flag);
 104extern int open_check_o_direct(struct file *f);
 105
 106/*
 107 * inode.c
 108 */
 109extern spinlock_t inode_sb_list_lock;
 110extern long prune_icache_sb(struct super_block *sb, unsigned long nr_to_scan,
 111                            int nid);
 112extern void inode_add_lru(struct inode *inode);
 113
 114/*
 115 * fs-writeback.c
 116 */
 117extern void inode_wb_list_del(struct inode *inode);
 118
 119extern long get_nr_dirty_inodes(void);
 120extern void evict_inodes(struct super_block *);
 121extern int invalidate_inodes(struct super_block *, bool);
 122
 123/*
 124 * dcache.c
 125 */
 126extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
 127extern int d_set_mounted(struct dentry *dentry);
 128extern long prune_dcache_sb(struct super_block *sb, unsigned long nr_to_scan,
 129                            int nid);
 130
 131/*
 132 * read_write.c
 133 */
 134extern ssize_t __kernel_write(struct file *, const char *, size_t, loff_t *);
 135extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
 136
 137/*
 138 * splice.c
 139 */
 140extern long do_splice_direct(struct file *in, loff_t *ppos, struct file *out,
 141                loff_t *opos, size_t len, unsigned int flags);
 142
 143/*
 144 * pipe.c
 145 */
 146extern const struct file_operations pipefifo_fops;
 147