cregit-Linux how code gets into the kernel

Release 4.12 include/uapi/linux/inotify.h

/*
 * Inode based directory notification for Linux
 *
 * Copyright (C) 2005 John McCutchan
 */

#ifndef _UAPI_LINUX_INOTIFY_H

#define _UAPI_LINUX_INOTIFY_H

/* For O_CLOEXEC and O_NONBLOCK */
#include <linux/fcntl.h>
#include <linux/types.h>

/*
 * struct inotify_event - structure read from the inotify device for each event
 *
 * When you are watching a directory, you will receive the filename for events
 * such as IN_CREATE, IN_DELETE, IN_OPEN, IN_CLOSE, ..., relative to the wd.
 */

struct inotify_event {
	
__s32		wd;		/* watch descriptor */
	
__u32		mask;		/* watch mask */
	
__u32		cookie;		/* cookie to synchronize two events */
	
__u32		len;		/* length (including nulls) of name */
	
char		name[0];	/* stub for possible name */
};

/* the following are legal, implemented events that user-space can watch for */

#define IN_ACCESS		0x00000001	
/* File was accessed */

#define IN_MODIFY		0x00000002	
/* File was modified */

#define IN_ATTRIB		0x00000004	
/* Metadata changed */

#define IN_CLOSE_WRITE		0x00000008	
/* Writtable file was closed */

#define IN_CLOSE_NOWRITE	0x00000010	
/* Unwrittable file closed */

#define IN_OPEN			0x00000020	
/* File was opened */

#define IN_MOVED_FROM		0x00000040	
/* File was moved from X */

#define IN_MOVED_TO		0x00000080	
/* File was moved to Y */

#define IN_CREATE		0x00000100	
/* Subfile was created */

#define IN_DELETE		0x00000200	
/* Subfile was deleted */

#define IN_DELETE_SELF		0x00000400	
/* Self was deleted */

#define IN_MOVE_SELF		0x00000800	
/* Self was moved */

/* the following are legal events.  they are sent as needed to any watch */

#define IN_UNMOUNT		0x00002000	
/* Backing fs was unmounted */

#define IN_Q_OVERFLOW		0x00004000	
/* Event queued overflowed */

#define IN_IGNORED		0x00008000	
/* File was ignored */

/* helper events */

#define IN_CLOSE		(IN_CLOSE_WRITE | IN_CLOSE_NOWRITE) 
/* close */

#define IN_MOVE			(IN_MOVED_FROM | IN_MOVED_TO) 
/* moves */

/* special flags */

#define IN_ONLYDIR		0x01000000	
/* only watch the path if it is a directory */

#define IN_DONT_FOLLOW		0x02000000	
/* don't follow a sym link */

#define IN_EXCL_UNLINK		0x04000000	
/* exclude events on unlinked objects */

#define IN_MASK_ADD		0x20000000	
/* add to the mask of an already existing watch */

#define IN_ISDIR		0x40000000	
/* event occurred against dir */

#define IN_ONESHOT		0x80000000	
/* only send event once */

/*
 * All of the events - we build the list by hand so that we can add flags in
 * the future and not break backward compatibility.  Apps will get only the
 * events that they originally wanted.  Be sure to add new events here!
 */

#define IN_ALL_EVENTS	(IN_ACCESS | IN_MODIFY | IN_ATTRIB | IN_CLOSE_WRITE | \
                         IN_CLOSE_NOWRITE | IN_OPEN | IN_MOVED_FROM | \
                         IN_MOVED_TO | IN_DELETE | IN_CREATE | IN_DELETE_SELF | \
                         IN_MOVE_SELF)

/* Flags for sys_inotify_init1.  */

#define IN_CLOEXEC O_CLOEXEC

#define IN_NONBLOCK O_NONBLOCK


#endif /* _UAPI_LINUX_INOTIFY_H */

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