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 iomap;
  15struct iomap_ops;
  16struct linux_binprm;
  17struct path;
  18struct mount;
  19struct shrink_control;
  20
  21/*
  22 * block_dev.c
  23 */
  24#ifdef CONFIG_BLOCK
  25extern void __init bdev_cache_init(void);
  26
  27extern int __sync_blockdev(struct block_device *bdev, int wait);
  28
  29#else
  30static inline void bdev_cache_init(void)
  31{
  32}
  33
  34static inline int __sync_blockdev(struct block_device *bdev, int wait)
  35{
  36        return 0;
  37}
  38#endif
  39
  40/*
  41 * buffer.c
  42 */
  43extern void guard_bio_eod(int rw, struct bio *bio);
  44extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
  45                get_block_t *get_block, struct iomap *iomap);
  46
  47/*
  48 * char_dev.c
  49 */
  50extern void __init chrdev_init(void);
  51
  52/*
  53 * namei.c
  54 */
  55extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *);
  56extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
  57                           const char *, unsigned int, struct path *);
  58
  59/*
  60 * namespace.c
  61 */
  62extern void *copy_mount_options(const void __user *);
  63extern char *copy_mount_string(const void __user *);
  64
  65extern struct vfsmount *lookup_mnt(const struct path *);
  66extern int finish_automount(struct vfsmount *, struct path *);
  67
  68extern int sb_prepare_remount_readonly(struct super_block *);
  69
  70extern void __init mnt_init(void);
  71
  72extern int __mnt_want_write(struct vfsmount *);
  73extern int __mnt_want_write_file(struct file *);
  74extern void __mnt_drop_write(struct vfsmount *);
  75extern void __mnt_drop_write_file(struct file *);
  76
  77/*
  78 * fs_struct.c
  79 */
  80extern void chroot_fs_refs(const struct path *, const struct path *);
  81
  82/*
  83 * file_table.c
  84 */
  85extern struct file *get_empty_filp(void);
  86
  87/*
  88 * super.c
  89 */
  90extern int do_remount_sb(struct super_block *, int, void *, int);
  91extern bool trylock_super(struct super_block *sb);
  92extern struct dentry *mount_fs(struct file_system_type *,
  93                               int, const char *, void *);
  94extern struct super_block *user_get_super(dev_t);
  95
  96/*
  97 * open.c
  98 */
  99struct open_flags {
 100        int open_flag;
 101        umode_t mode;
 102        int acc_mode;
 103        int intent;
 104        int lookup_flags;
 105};
 106extern struct file *do_filp_open(int dfd, struct filename *pathname,
 107                const struct open_flags *op);
 108extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
 109                const char *, const struct open_flags *);
 110
 111extern int open_check_o_direct(struct file *f);
 112extern int vfs_open(const struct path *, struct file *, const struct cred *);
 113extern struct file *filp_clone_open(struct file *);
 114
 115/*
 116 * inode.c
 117 */
 118extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
 119extern void inode_add_lru(struct inode *inode);
 120extern int dentry_needs_remove_privs(struct dentry *dentry);
 121
 122extern bool __atime_needs_update(const struct path *, struct inode *, bool);
 123static inline bool atime_needs_update_rcu(const struct path *path,
 124                                          struct inode *inode)
 125{
 126        return __atime_needs_update(path, inode, true);
 127}
 128
 129/*
 130 * fs-writeback.c
 131 */
 132extern void inode_io_list_del(struct inode *inode);
 133
 134extern long get_nr_dirty_inodes(void);
 135extern void evict_inodes(struct super_block *);
 136extern int invalidate_inodes(struct super_block *, bool);
 137
 138/*
 139 * dcache.c
 140 */
 141extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
 142extern int d_set_mounted(struct dentry *dentry);
 143extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
 144extern struct dentry *d_alloc_cursor(struct dentry *);
 145
 146/*
 147 * read_write.c
 148 */
 149extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
 150
 151/*
 152 * pipe.c
 153 */
 154extern const struct file_operations pipefifo_fops;
 155
 156/*
 157 * fs_pin.c
 158 */
 159extern void group_pin_kill(struct hlist_head *p);
 160extern void mnt_pin_kill(struct mount *m);
 161
 162/*
 163 * fs/nsfs.c
 164 */
 165extern const struct dentry_operations ns_dentry_operations;
 166
 167/*
 168 * fs/ioctl.c
 169 */
 170extern int do_vfs_ioctl(struct file *file, unsigned int fd, unsigned int cmd,
 171                    unsigned long arg);
 172extern long vfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
 173
 174/*
 175 * iomap support:
 176 */
 177typedef loff_t (*iomap_actor_t)(struct inode *inode, loff_t pos, loff_t len,
 178                void *data, struct iomap *iomap);
 179
 180loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length,
 181                unsigned flags, const struct iomap_ops *ops, void *data,
 182                iomap_actor_t actor);
 183
 184/* direct-io.c: */
 185int sb_init_dio_done_wq(struct super_block *sb);
 186