internal.h 3.31 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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#include <linux/lglock.h>

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struct super_block;
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struct file_system_type;
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struct linux_binprm;
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struct path;
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struct mount;
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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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/*
 * char_dev.c
 */
extern void __init chrdev_init(void);

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/*
 * namei.c
 */
extern int __inode_permission(struct inode *, int);

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/*
 * namespace.c
 */
extern int copy_mount_options(const void __user *, unsigned long *);
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extern int copy_mount_string(const void __user *, char **);
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extern struct vfsmount *lookup_mnt(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 struct lglock vfsmount_lock;
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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 void file_sb_list_add(struct file *f, struct super_block *sb);
extern void file_sb_list_del(struct file *f);
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extern void mark_files_ro(struct super_block *);
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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 grab_super_passive(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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extern struct file *do_filp_open(int dfd, struct filename *pathname,
		const struct open_flags *op, int flags);
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extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
		const char *, const struct open_flags *, int lookup_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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/*
 * inode.c
 */
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extern spinlock_t inode_sb_list_lock;
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extern void inode_add_lru(struct inode *inode);
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/*
 * fs-writeback.c
 */
extern void inode_wb_list_del(struct inode *inode);

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extern int 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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/*
 * read_write.c
 */
extern ssize_t __kernel_write(struct file *, const char *, size_t, loff_t *);
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/*
 * splice.c
 */
extern long do_splice_direct(struct file *in, loff_t *ppos, struct file *out,
		loff_t *opos, size_t len, unsigned int flags);

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/*
 * pipe.c
 */
extern const struct file_operations pipefifo_fops;