internal.h 4.7 KB
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/* fs/ internal definitions
 *
 * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

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struct super_block;
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struct file_system_type;
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struct iomap;
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struct iomap_ops;
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struct linux_binprm;
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struct path;
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struct mount;
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struct shrink_control;
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/*
 * block_dev.c
 */
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#ifdef CONFIG_BLOCK
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extern void __init bdev_cache_init(void);

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extern int __sync_blockdev(struct block_device *bdev, int wait);

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#else
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static inline void bdev_cache_init(void)
{
}
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static inline int __sync_blockdev(struct block_device *bdev, int wait)
{
	return 0;
}
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#endif
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/*
 * buffer.c
 */
extern void guard_bio_eod(int rw, struct bio *bio);
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extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
		get_block_t *get_block, struct iomap *iomap);
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/*
 * char_dev.c
 */
extern void __init chrdev_init(void);

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/*
 * namei.c
 */
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extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *);
extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
			   const char *, unsigned int, struct path *);
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/*
 * namespace.c
 */
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extern void *copy_mount_options(const void __user *);
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extern char *copy_mount_string(const void __user *);
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extern struct vfsmount *lookup_mnt(const struct path *);
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extern int finish_automount(struct vfsmount *, struct path *);
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extern int sb_prepare_remount_readonly(struct super_block *);
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extern void __init mnt_init(void);
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extern int __mnt_want_write(struct vfsmount *);
extern int __mnt_want_write_file(struct file *);
extern void __mnt_drop_write(struct vfsmount *);
extern void __mnt_drop_write_file(struct file *);
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/*
 * fs_struct.c
 */
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extern void chroot_fs_refs(const struct path *, const struct path *);
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/*
 * file_table.c
 */
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extern struct file *get_empty_filp(void);
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/*
 * super.c
 */
extern int do_remount_sb(struct super_block *, int, void *, int);
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extern bool trylock_super(struct super_block *sb);
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extern struct dentry *mount_fs(struct file_system_type *,
			       int, const char *, void *);
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extern struct super_block *user_get_super(dev_t);
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/*
 * open.c
 */
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struct open_flags {
	int open_flag;
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	umode_t mode;
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	int acc_mode;
	int intent;
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	int lookup_flags;
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};
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extern struct file *do_filp_open(int dfd, struct filename *pathname,
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		const struct open_flags *op);
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extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
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		const char *, const struct open_flags *);
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extern long do_handle_open(int mountdirfd,
			   struct file_handle __user *ufh, int open_flag);
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extern int open_check_o_direct(struct file *f);
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extern int vfs_open(const struct path *, struct file *, const struct cred *);
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extern struct file *filp_clone_open(struct file *);
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/*
 * inode.c
 */
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extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
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extern void inode_add_lru(struct inode *inode);
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extern int dentry_needs_remove_privs(struct dentry *dentry);
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extern bool __atime_needs_update(const struct path *, struct inode *, bool);
static inline bool atime_needs_update_rcu(const struct path *path,
					  struct inode *inode)
{
	return __atime_needs_update(path, inode, true);
}

extern bool atime_needs_update_rcu(const struct path *, struct inode *);

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/*
 * fs-writeback.c
 */
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extern void inode_io_list_del(struct inode *inode);
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extern long get_nr_dirty_inodes(void);
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extern void evict_inodes(struct super_block *);
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extern int invalidate_inodes(struct super_block *, bool);
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/*
 * dcache.c
 */
extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
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extern int d_set_mounted(struct dentry *dentry);
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extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
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extern struct dentry *d_alloc_cursor(struct dentry *);
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/*
 * read_write.c
 */
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extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
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/*
 * pipe.c
 */
extern const struct file_operations pipefifo_fops;
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/*
 * fs_pin.c
 */
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extern void group_pin_kill(struct hlist_head *p);
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extern void mnt_pin_kill(struct mount *m);
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/*
 * fs/nsfs.c
 */
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extern const struct dentry_operations ns_dentry_operations;
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/*
 * fs/ioctl.c
 */
extern int do_vfs_ioctl(struct file *file, unsigned int fd, unsigned int cmd,
		    unsigned long arg);
extern long vfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
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/*
 * iomap support:
 */
typedef loff_t (*iomap_actor_t)(struct inode *inode, loff_t pos, loff_t len,
		void *data, struct iomap *iomap);

loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length,
		unsigned flags, struct iomap_ops *ops, void *data,
		iomap_actor_t actor);