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 int sb_prepare_remount_readonly(struct super_block *);
  54
  55 extern void __init mnt_init(void);
  56
  57 extern struct lglock vfsmount_lock;
  58
  59
  60 /*
  61  * fs_struct.c
  62  */
  63 extern void chroot_fs_refs(struct path *, struct path *);
  64
  65 /*
  66  * file_table.c
  67  */
  68 extern void file_sb_list_add(struct file *f, struct super_block *sb);
  69 extern void file_sb_list_del(struct file *f);
  70 extern void mark_files_ro(struct super_block *);
  71 extern struct file *get_empty_filp(void);
  72
  73 /*
  74  * super.c
  75  */
  76 extern int do_remount_sb(struct super_block *, int, void *, int);
  77 extern bool grab_super_passive(struct super_block *sb);
  78 extern struct dentry *mount_fs(struct file_system_type *,
  79                                int, const char *, void *);
  80 extern struct super_block *user_get_super(dev_t);
  81
  82 /*
  83  * open.c
  84  */
  85 struct open_flags {
  86         int open_flag;
  87         umode_t mode;
  88         int acc_mode;
  89         int intent;
  90 };
  91 extern struct file *do_filp_open(int dfd, const char *pathname,
  92                 const struct open_flags *op, int lookup_flags);
  93 extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
  94                 const char *, const struct open_flags *, int lookup_flags);
  95
  96 extern long do_handle_open(int mountdirfd,
  97                            struct file_handle __user *ufh, int open_flag);
  98 extern int open_check_o_direct(struct file *f);
  99
 100 /*
 101  * inode.c
 102  */
 103 extern spinlock_t inode_sb_list_lock;
 104
 105 /*
 106  * fs-writeback.c
 107  */
 108 extern void inode_wb_list_del(struct inode *inode);
 109
 110 extern int get_nr_dirty_inodes(void);
 111 extern void evict_inodes(struct super_block *);
 112 extern int invalidate_inodes(struct super_block *, bool);
 113
 114 /*
 115  * dcache.c
 116  */
 117 extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);