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