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hal/gonk/fanotify.h@7e26c7da4463 (annotated)

hal/gonk/fanotify.h

Wed, 31 Dec 2014 06:55:50 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Wed, 31 Dec 2014 06:55:50 +0100

changeset 2

7e26c7da4463

permissions

-rw-r--r--

Added tag UPSTREAM_283F7C6 for changeset ca08bd8f51b2

michael@0	1	#ifndef _LINUX_FANOTIFY_H
michael@0	2	#define _LINUX_FANOTIFY_H
michael@0	3
michael@0	4	/* This is a Linux header generated by "make headers_install" */
michael@0	5
michael@0	6	#include <linux/types.h>
michael@0	7
michael@0	8	/* the following events that user-space can register for */
michael@0	9	#define FAN_ACCESS 0x00000001 /* File was accessed */
michael@0	10	#define FAN_MODIFY 0x00000002 /* File was modified */
michael@0	11	#define FAN_CLOSE_WRITE 0x00000008 /* Writtable file closed */
michael@0	12	#define FAN_CLOSE_NOWRITE 0x00000010 /* Unwrittable file closed */
michael@0	13	#define FAN_OPEN 0x00000020 /* File was opened */
michael@0	14
michael@0	15	#define FAN_Q_OVERFLOW 0x00004000 /* Event queued overflowed */
michael@0	16
michael@0	17	#define FAN_OPEN_PERM 0x00010000 /* File open in perm check */
michael@0	18	#define FAN_ACCESS_PERM 0x00020000 /* File accessed in perm check */
michael@0	19
michael@0	20	#define FAN_ONDIR 0x40000000 /* event occurred against dir */
michael@0	21
michael@0	22	#define FAN_EVENT_ON_CHILD 0x08000000 /* interested in child events */
michael@0	23
michael@0	24	/* helper events */
michael@0	25	#define FAN_CLOSE (FAN_CLOSE_WRITE | FAN_CLOSE_NOWRITE) /* close */
michael@0	26
michael@0	27	/* flags used for fanotify_init() */
michael@0	28	#define FAN_CLOEXEC 0x00000001
michael@0	29	#define FAN_NONBLOCK 0x00000002
michael@0	30
michael@0	31	/* These are NOT bitwise flags. Both bits are used togther. */
michael@0	32	#define FAN_CLASS_NOTIF 0x00000000
michael@0	33	#define FAN_CLASS_CONTENT 0x00000004
michael@0	34	#define FAN_CLASS_PRE_CONTENT 0x00000008
michael@0	35	#define FAN_ALL_CLASS_BITS (FAN_CLASS_NOTIF | FAN_CLASS_CONTENT | \
michael@0	36	FAN_CLASS_PRE_CONTENT)
michael@0	37
michael@0	38	#define FAN_UNLIMITED_QUEUE 0x00000010
michael@0	39	#define FAN_UNLIMITED_MARKS 0x00000020
michael@0	40
michael@0	41	#define FAN_ALL_INIT_FLAGS (FAN_CLOEXEC | FAN_NONBLOCK | \
michael@0	42	FAN_ALL_CLASS_BITS | FAN_UNLIMITED_QUEUE |\
michael@0	43	FAN_UNLIMITED_MARKS)
michael@0	44
michael@0	45	/* flags used for fanotify_modify_mark() */
michael@0	46	#define FAN_MARK_ADD 0x00000001
michael@0	47	#define FAN_MARK_REMOVE 0x00000002
michael@0	48	#define FAN_MARK_DONT_FOLLOW 0x00000004
michael@0	49	#define FAN_MARK_ONLYDIR 0x00000008
michael@0	50	#define FAN_MARK_MOUNT 0x00000010
michael@0	51	#define FAN_MARK_IGNORED_MASK 0x00000020
michael@0	52	#define FAN_MARK_IGNORED_SURV_MODIFY 0x00000040
michael@0	53	#define FAN_MARK_FLUSH 0x00000080
michael@0	54
michael@0	55	#define FAN_ALL_MARK_FLAGS (FAN_MARK_ADD |\
michael@0	56	FAN_MARK_REMOVE |\
michael@0	57	FAN_MARK_DONT_FOLLOW |\
michael@0	58	FAN_MARK_ONLYDIR |\
michael@0	59	FAN_MARK_MOUNT |\
michael@0	60	FAN_MARK_IGNORED_MASK |\
michael@0	61	FAN_MARK_IGNORED_SURV_MODIFY |\
michael@0	62	FAN_MARK_FLUSH)
michael@0	63
michael@0	64	/*
michael@0	65	* All of the events - we build the list by hand so that we can add flags in
michael@0	66	* the future and not break backward compatibility. Apps will get only the
michael@0	67	* events that they originally wanted. Be sure to add new events here!
michael@0	68	*/
michael@0	69	#define FAN_ALL_EVENTS (FAN_ACCESS |\
michael@0	70	FAN_MODIFY |\
michael@0	71	FAN_CLOSE |\
michael@0	72	FAN_OPEN)
michael@0	73
michael@0	74	/*
michael@0	75	* All events which require a permission response from userspace
michael@0	76	*/
michael@0	77	#define FAN_ALL_PERM_EVENTS (FAN_OPEN_PERM |\
michael@0	78	FAN_ACCESS_PERM)
michael@0	79
michael@0	80	#define FAN_ALL_OUTGOING_EVENTS (FAN_ALL_EVENTS |\
michael@0	81	FAN_ALL_PERM_EVENTS |\
michael@0	82	FAN_Q_OVERFLOW)
michael@0	83
michael@0	84	#define FANOTIFY_METADATA_VERSION 3
michael@0	85
michael@0	86	struct fanotify_event_metadata {
michael@0	87	__u32 event_len;
michael@0	88	__u8 vers;
michael@0	89	__u8 reserved;
michael@0	90	__u16 metadata_len;
michael@0	91	__u64 mask;
michael@0	92	__s32 fd;
michael@0	93	__s32 pid;
michael@0	94	};
michael@0	95
michael@0	96	struct fanotify_response {
michael@0	97	__s32 fd;
michael@0	98	__u32 response;
michael@0	99	};
michael@0	100
michael@0	101	/* Legit userspace responses to a _PERM event */
michael@0	102	#define FAN_ALLOW 0x01
michael@0	103	#define FAN_DENY 0x02
michael@0	104	/* No fd set in event */
michael@0	105	#define FAN_NOFD -1
michael@0	106
michael@0	107	/* Helper functions to deal with fanotify_event_metadata buffers */
michael@0	108	#define FAN_EVENT_METADATA_LEN (sizeof(struct fanotify_event_metadata))
michael@0	109
michael@0	110	#define FAN_EVENT_NEXT(meta, len) ((len) -= (meta)->event_len, \
michael@0	111	(struct fanotify_event_metadata*)(((char *)(meta)) + \
michael@0	112	(meta)->event_len))
michael@0	113
michael@0	114	#define FAN_EVENT_OK(meta, len) ((long)(len) >= (long)FAN_EVENT_METADATA_LEN && \
michael@0	115	(long)(meta)->event_len >= (long)FAN_EVENT_METADATA_LEN && \
michael@0	116	(long)(meta)->event_len <= (long)(len))
michael@0	117
michael@0	118	#endif /* _LINUX_FANOTIFY_H */