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
  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 * namei.c
  46 */
  47extern int __inode_permission(struct inode *, int);
  48
  49/*
  50 * namespace.c
  51 */
  52extern int copy_mount_options(const void __user *, unsigned long *);
  53extern int copy_mount_string(const void __user *, char **);
  54
  55extern struct vfsmount *lookup_mnt(struct path *);
  56extern int finish_automount(struct vfsmount *, struct path *);
  57
  58extern int sb_prepare_remount_readonly(struct super_block *);
  59
  60extern void __init mnt_init(void);
  61
  62extern struct lglock vfsmount_lock;
  63
  64extern int __mnt_want_write(struct vfsmount *);
  65extern int __mnt_want_write_file(struct file *);
  66extern void __mnt_drop_write(struct vfsmount *);
  67extern void __mnt_drop_write_file(struct file *);
  68
  69/*
  70 * fs_struct.c
  71 */
  72extern void chroot_fs_refs(const struct path *, const struct path *);
  73
  74/*
  75 * file_table.c
  76 */
  77extern void file_sb_list_add(struct file *f, struct super_block *sb);
  78extern void file_sb_list_del(struct file *f);
  79extern void mark_files_ro(struct super_block *);
  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 void inode_add_lru(struct inode *inode);
 115
 116/*
 117 * fs-writeback.c
 118 */
 119extern void inode_wb_list_del(struct inode *inode);
 120
 121extern int get_nr_dirty_inodes(void);
 122extern void evict_inodes(struct super_block *);
 123extern int invalidate_inodes(struct super_block *, bool);
 124
 125/*
 126 * dcache.c
 127 */
 128extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
 129
 130/*
 131 * read_write.c
 132 */
 133extern ssize_t __kernel_write(struct file *, const char *, size_t, loff_t *);
 134extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
 135
 136/*
 137 * splice.c
 138 */
 139extern long do_splice_direct(struct file *in, loff_t *ppos, struct file *out,
 140                loff_t *opos, size_t len, unsigned int flags);
 141
 142/*
 143 * pipe.c
 144 */
 145extern const struct file_operations pipefifo_fops;
 146