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 iomap;
  15 struct linux_binprm;
  16 struct path;
  17 struct mount;
  18 struct shrink_control;
  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  * buffer.c
  41  */
  42 extern void guard_bio_eod(int rw, struct bio *bio);
  43 extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
  44                 get_block_t *get_block, struct iomap *iomap);
  45
  46 /*
  47  * char_dev.c
  48  */
  49 extern void __init chrdev_init(void);
  50
  51 /*
  52  * namei.c
  53  */
  54 extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *);
  55 extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
  56                            const char *, unsigned int, struct path *);
  57
  58 /*
  59  * namespace.c
  60  */
  61 extern void *copy_mount_options(const void __user *);
  62 extern char *copy_mount_string(const void __user *);
  63
  64 extern struct vfsmount *lookup_mnt(struct path *);
  65 extern int finish_automount(struct vfsmount *, struct path *);
  66
  67 extern int sb_prepare_remount_readonly(struct super_block *);
  68
  69 extern void __init mnt_init(void);
  70
  71 extern int __mnt_want_write(struct vfsmount *);
  72 extern int __mnt_want_write_file(struct file *);
  73 extern void __mnt_drop_write(struct vfsmount *);
  74 extern void __mnt_drop_write_file(struct file *);
  75
  76 /*
  77  * fs_struct.c
  78  */
  79 extern void chroot_fs_refs(const struct path *, const struct path *);
  80
  81 /*
  82  * file_table.c
  83  */
  84 extern struct file *get_empty_filp(void);
  85
  86 /*
  87  * super.c
  88  */
  89 extern int do_remount_sb(struct super_block *, int, void *, int);
  90 extern bool trylock_super(struct super_block *sb);
  91 extern struct dentry *mount_fs(struct file_system_type *,
  92                                int, const char *, void *);
  93 extern struct super_block *user_get_super(dev_t);
  94
  95 /*
  96  * open.c
  97  */
  98 struct open_flags {
  99         int open_flag;
 100         umode_t mode;
 101         int acc_mode;
 102         int intent;
 103         int lookup_flags;
 104 };
 105 extern struct file *do_filp_open(int dfd, struct filename *pathname,
 106                 const struct open_flags *op);
 107 extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
 108                 const char *, const struct open_flags *);
 109
 110 extern long do_handle_open(int mountdirfd,
 111                            struct file_handle __user *ufh, int open_flag);
 112 extern int open_check_o_direct(struct file *f);
 113 extern int vfs_open(const struct path *, struct file *, const struct cred *);
 114 extern struct file *filp_clone_open(struct file *);
 115
 116 /*
 117  * inode.c
 118  */
 119 extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
 120 extern void inode_add_lru(struct inode *inode);
 121 extern int dentry_needs_remove_privs(struct dentry *dentry);
 122
 123 /*
 124  * fs-writeback.c
 125  */
 126 extern void inode_io_list_del(struct inode *inode);
 127
 128 extern long get_nr_dirty_inodes(void);
 129 extern void evict_inodes(struct super_block *);
 130 extern int invalidate_inodes(struct super_block *, bool);
 131
 132 /*
 133  * dcache.c
 134  */
 135 extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
 136 extern int d_set_mounted(struct dentry *dentry);
 137 extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
 138 extern struct dentry *d_alloc_cursor(struct dentry *);
 139
 140 /*
 141  * read_write.c
 142  */
 143 extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
 144
 145 /*
 146  * pipe.c
 147  */
 148 extern const struct file_operations pipefifo_fops;
 149
 150 /*
 151  * fs_pin.c
 152  */
 153 extern void group_pin_kill(struct hlist_head *p);
 154 extern void mnt_pin_kill(struct mount *m);
 155
 156 /*
 157  * fs/nsfs.c
 158  */
 159 extern struct dentry_operations ns_dentry_operations;
 160
 161 /*
 162  * fs/ioctl.c
 163  */
 164 extern int do_vfs_ioctl(struct file *file, unsigned int fd, unsigned int cmd,
 165                     unsigned long arg);
 166 extern long vfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);