/* Copyright (C) 2010-2015 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#ifndef	_SYS_FANOTIFY_H
#define	_SYS_FANOTIFY_H	1

#include <stdint.h>
#include <sys/statfs.h>

struct fanotify_event_metadata {
	unsigned event_len;
	unsigned char vers;
	unsigned char reserved;
	unsigned short metadata_len;
	unsigned long long mask
#ifdef __GNUC__
	__attribute__((__aligned__(8)))
#endif
	;
	int fd;
	int pid;
};

struct fanotify_event_info_header {
	unsigned char info_type;
	unsigned char pad;
	unsigned short len;
};

struct fanotify_event_info_fid {
	struct fanotify_event_info_header hdr;
	__fsid_t fsid;
	unsigned char handle[];
};

struct fanotify_response {
	int fd;
	unsigned response;
};

#define FAN_ACCESS 0x01
#define FAN_MODIFY 0x02
#define FAN_CLOSE_WRITE 0x08
#define FAN_CLOSE_NOWRITE 0x10
#define FAN_OPEN 0x20
#define FAN_Q_OVERFLOW 0x4000
#define FAN_OPEN_PERM 0x10000
#define FAN_ACCESS_PERM 0x20000
#define FAN_ONDIR 0x40000000
#define FAN_EVENT_ON_CHILD 0x08000000
#define FAN_CLOSE (FAN_CLOSE_WRITE | FAN_CLOSE_NOWRITE)
#define FAN_CLOEXEC 0x01
#define FAN_NONBLOCK 0x02
#define FAN_CLASS_NOTIF 0
#define FAN_CLASS_CONTENT 0x04
#define FAN_CLASS_PRE_CONTENT 0x08
#define FAN_ALL_CLASS_BITS (FAN_CLASS_NOTIF | FAN_CLASS_CONTENT | FAN_CLASS_PRE_CONTENT)
#define FAN_UNLIMITED_QUEUE 0x10
#define FAN_UNLIMITED_MARKS 0x20
#define FAN_ENABLE_AUDIT 0x40
#define FAN_REPORT_TID 0x100
#define FAN_REPORT_FID 0x200
#define FAN_REPORT_DIR_FID 0x00000400
#define FAN_REPORT_NAME 0x00000800
#define FAN_REPORT_DFID_NAME (FAN_REPORT_DIR_FID | FAN_REPORT_NAME)
#define FAN_ALL_INIT_FLAGS (FAN_CLOEXEC | FAN_NONBLOCK | FAN_ALL_CLASS_BITS | FAN_UNLIMITED_QUEUE | FAN_UNLIMITED_MARKS)
#define FAN_MARK_ADD 0x01
#define FAN_MARK_REMOVE 0x02
#define FAN_MARK_DONT_FOLLOW 0x04
#define FAN_MARK_ONLYDIR 0x08
#define FAN_MARK_MOUNT 0x10
#define FAN_MARK_IGNORED_MASK 0x20
#define FAN_MARK_IGNORED_SURV_MODIFY 0x40
#define FAN_MARK_FLUSH 0x80
#define FAN_MARK_INODE 0x00
#define FAN_MARK_MOUNT 0x10
#define FAN_MARK_FILESYSTEM 0x100
#define FAN_MARK_TYPE_MASK (FAN_MARK_INODE | FAN_MARK_MOUNT | FAN_MARK_FILESYSTEM)
#define FAN_ALL_MARK_FLAGS (FAN_MARK_ADD | FAN_MARK_REMOVE | FAN_MARK_DONT_FOLLOW | FAN_MARK_ONLYDIR | FAN_MARK_MOUNT | FAN_MARK_IGNORED_MASK | FAN_MARK_IGNORED_SURV_MODIFY | FAN_MARK_FLUSH)
#define FAN_ALL_EVENTS (FAN_ACCESS | FAN_MODIFY | FAN_CLOSE | FAN_OPEN)
#define FAN_ALL_PERM_EVENTS (FAN_OPEN_PERM | FAN_ACCESS_PERM)
#define FAN_ALL_OUTGOING_EVENTS (FAN_ALL_EVENTS | FAN_ALL_PERM_EVENTS | FAN_Q_OVERFLOW)
#define FANOTIFY_METADATA_VERSION 3
#define FAN_EVENT_INFO_TYPE_FID 1
#define FAN_EVENT_INFO_TYPE_DFID_NAME 2
#define FAN_EVENT_INFO_TYPE_DFID 3
#define FAN_ALLOW 0x01
#define FAN_DENY 0x02
#define FAN_AUDIT 0x10
#define FAN_NOFD -1
#define FAN_EVENT_METADATA_LEN (sizeof(struct fanotify_event_metadata))
#define FAN_EVENT_NEXT(meta, len) ((len) -= (meta)->event_len, (struct fanotify_event_metadata*)(((char *)(meta)) + (meta)->event_len))
#define FAN_EVENT_OK(meta, len) ((long)(len) >= (long)FAN_EVENT_METADATA_LEN && (long)(meta)->event_len >= (long)FAN_EVENT_METADATA_LEN && (long)(meta)->event_len <= (long)(len))


__BEGIN_DECLS

/* Create and initialize fanotify group.  */
extern int fanotify_init (unsigned int __flags, unsigned int __event_f_flags)
  __THROW;

/* Add, remove, or modify an fanotify mark on a filesystem object.  */
extern int fanotify_mark (int __fanotify_fd, unsigned int __flags,
			  uint64_t __mask, int __dfd, const char *__pathname)
     __THROW;

__END_DECLS

#endif /* sys/fanotify.h */
