/*
 * Inode based directory notification for Linux
 *
 * Copyright (C) 2004 John McCutchan
 */

#ifndef _LINUX_INOTIFY_H
#define _LINUX_INOTIFY_H

#include <linux/fs.h>
#include <linux/ioctl.h>

/* When reading from the device the format is:
 * 	INODE_NUMBER [unsigned long]
 * 	INODE_DEVICE_NUMBER [unsigned long]
 * 	EVENT_MASK [unsigned long]
 */

#define IN_ACCESS	0x00000001	/* File was accessed */
#define IN_MODIFY	0x00000002	/* File was modified */
#define IN_CREATE	0x00000004	/* File was created */
#define IN_DELETE	0x00000008	/* File was deleted */
#define IN_RENAME	0x00000010	/* File was renamed */
#define IN_ATTRIB	0x00000020	/* File changed attributes */
#define IN_MOVE		0x00000040	/* File was moved */
#define IN_UNMOUNT	0x00000080	/* Device file was on, was unmounted */

/* Fill this and pass it to the ioctl */
struct inotify_packet {
	unsigned long i_no; // from stat
	unsigned long i_dev; // from stat
	unsigned long mask; // combination of above
};

/* ioctl */

#define INOTIFY_IOCTL_MAGIC 'Q'
#define INOTIFY_IOCTL_MAXNR 2

#define INOTIFY_WATCH	_IOW(INOTIFY_IOCTL_MAGIC, 1, struct inotify_watch)
#define INOTIFY_IGNORE	_IOW(INOTIFY_IOCTL_MAGIC, 2, struct inotify_watch)

/* Kernel API */
void inotify_inode_queue_event (struct inode *inode, unsigned long mask);
void inotify_dentry_queue_event (struct dentry *dentry, unsigned long mask);
void inotify_inode_update_mask (struct inode *inode);

#endif