[apple/xnu.git] / bsd / sys / fsevents.h

/*
 * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
#ifndef FSEVENT_H
#define FSEVENT_H 1

// Event types that you can ask to listen for
#define FSE_INVALID             -1
#define FSE_CREATE_FILE          0
#define FSE_DELETE               1
#define FSE_STAT_CHANGED         2
#define FSE_RENAME               3
#define FSE_CONTENT_MODIFIED     4
#define FSE_EXCHANGE             5
#define FSE_FINDER_INFO_CHANGED  6
#define FSE_CREATE_DIR           7
#define FSE_CHOWN                8
#define FSE_XATTR_MODIFIED       9
#define FSE_XATTR_REMOVED       10

#define FSE_MAX_EVENTS          11
#define FSE_ALL_EVENTS         998

#define FSE_EVENTS_DROPPED     999

//
// These defines only apply if you've asked for extended
// type info.  In that case the type field's low 12-bits
// contain the basic types defined above and the top 4
// bits contain flags that indicate if an event had other
// events combined with it or if it represents a directory
// that has dropped events below it.
//
#define FSE_TYPE_MASK          0x0fff
#define FSE_FLAG_MASK          0xf000
#define FSE_FLAG_SHIFT         12
#define FSE_GET_FLAGS(type)    (((type) >> 12) & 0x000f)

#define FSE_COMBINED_EVENTS          0x0001
#define FSE_CONTAINS_DROPPED_EVENTS  0x0002


// Actions for each event type
#define FSE_IGNORE    0
#define FSE_REPORT    1
#define FSE_ASK       2    // Not implemented yet

// The types of each of the arguments for an event
// Each type is followed by the size and then the
// data.  FSE_ARG_VNODE is just a path string
#define FSE_ARG_VNODE    0x0001   // next arg is a vnode pointer
#define FSE_ARG_STRING   0x0002   // next arg is length followed by string ptr
#define FSE_ARG_PATH     0x0003   // next arg is a full path
#define FSE_ARG_INT32    0x0004   // next arg is a 32-bit int
#define FSE_ARG_INT64    0x0005   // next arg is a 64-bit int
#define FSE_ARG_RAW      0x0006   // next arg is a length followed by a void ptr
#define FSE_ARG_INO      0x0007   // next arg is the inode number (ino_t)
#define FSE_ARG_UID      0x0008   // next arg is the file's uid (uid_t)
#define FSE_ARG_DEV      0x0009   // next arg is the file's dev_t
#define FSE_ARG_MODE     0x000a   // next arg is the file's mode (as an int32, file type only)
#define FSE_ARG_GID      0x000b   // next arg is the file's gid (gid_t)
#define FSE_ARG_FINFO    0x000c   // next arg is a packed finfo (dev, ino, mode, uid, gid)
#define FSE_ARG_DONE     0xb33f   // no more arguments

#define FSE_MAX_ARGS     12

//
// These are special bits that be set in the 32-bit mode
// field that /dev/fsevents provides.
//
#define FSE_MODE_HLINK         (1 << 31)    // notification is for a hard-link
#define FSE_MODE_LAST_HLINK    (1 << 30)    // link count == 0 on a hard-link delete 
#define FSE_REMOTE_DIR_EVENT   (1 << 29)    // this is a remotely generated directory-level granularity event
#define FSE_TRUNCATED_PATH     (1 << 28)    // the path for this item had to be truncated

// ioctl's on /dev/fsevents
#if __LP64__
typedef struct fsevent_clone_args {
    int8_t  *event_list;
    int32_t  num_events;
    int32_t  event_queue_depth;
    int32_t *fd;
} fsevent_clone_args;
#else
typedef struct fsevent_clone_args {
    int8_t  *event_list;
    int32_t  pad1;
    int32_t  num_events;
    int32_t  event_queue_depth;
    int32_t *fd;
    int32_t  pad2;
} fsevent_clone_args;
#endif

#define	FSEVENTS_CLONE		_IOW('s', 1, fsevent_clone_args)


// ioctl's on the cloned fd
#if __LP64__
#pragma pack(push, 4)
typedef struct fsevent_dev_filter_args {
    uint32_t  num_devices;
    dev_t    *devices;
} fsevent_dev_filter_args;
#pragma pack(pop)
#else
typedef struct fsevent_dev_filter_args {
    uint32_t  num_devices;
    dev_t    *devices;
    int32_t   pad1;
} fsevent_dev_filter_args;
#endif

#define	FSEVENTS_DEVICE_FILTER		_IOW('s', 100, fsevent_dev_filter_args)
#define	FSEVENTS_WANT_COMPACT_EVENTS	_IO('s', 101)
#define	FSEVENTS_WANT_EXTENDED_INFO	_IO('s', 102)
#define	FSEVENTS_GET_CURRENT_ID		_IOR('s', 103, uint64_t)


#ifdef KERNEL

void fsevents_init(void);
int  need_fsevent(int type, vnode_t vp);
int  add_fsevent(int type, vfs_context_t, ...);
void fsevent_unmount(struct mount *mp);
struct vnode_attr;
void create_fsevent_from_kevent(vnode_t vp, uint32_t kevents, struct vnode_attr *vap);

// misc utility functions for fsevent info and pathbuffers...
typedef struct fse_info {
    ino64_t    ino;
    dev_t      dev;
    int32_t    mode;   // note: this is not a mode_t (it's 32-bits, not 16)
    uid_t      uid;
    gid_t      gid;
    uint64_t   nlink;  // only filled in if the vnode is marked as a hardlink
} fse_info;

int   get_fse_info(struct vnode *vp, fse_info *fse, vfs_context_t ctx);
int   vnode_get_fse_info_from_vap(vnode_t vp, fse_info *fse, struct vnode_attr *vap);

char *get_pathbuff(void);
void  release_pathbuff(char *path);

#endif /* KERNEL */

#endif /* FSEVENT_H */
Commit	Line	Data
2d21ac55 A	1	/*
	2	* Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
	5	*
	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
	14	*
	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
	25	*
	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
	27	*/
91447636 A	28	#ifndef FSEVENT_H
	29	#define FSEVENT_H 1
	30
	31	// Event types that you can ask to listen for
	32	#define FSE_INVALID -1
	33	#define FSE_CREATE_FILE 0
	34	#define FSE_DELETE 1
	35	#define FSE_STAT_CHANGED 2
	36	#define FSE_RENAME 3
	37	#define FSE_CONTENT_MODIFIED 4
	38	#define FSE_EXCHANGE 5
	39	#define FSE_FINDER_INFO_CHANGED 6
	40	#define FSE_CREATE_DIR 7
	41	#define FSE_CHOWN 8
2d21ac55 A	42	#define FSE_XATTR_MODIFIED 9
2d21ac55 A	43	#define FSE_XATTR_REMOVED 10
91447636	44
2d21ac55	45	#define FSE_MAX_EVENTS 11
91447636 A	46	#define FSE_ALL_EVENTS 998
	47
	48	#define FSE_EVENTS_DROPPED 999
	49
2d21ac55 A	50	//
	51	// These defines only apply if you've asked for extended
	52	// type info. In that case the type field's low 12-bits
	53	// contain the basic types defined above and the top 4
	54	// bits contain flags that indicate if an event had other
	55	// events combined with it or if it represents a directory
	56	// that has dropped events below it.
	57	//
	58	#define FSE_TYPE_MASK 0x0fff
	59	#define FSE_FLAG_MASK 0xf000
	60	#define FSE_FLAG_SHIFT 12
	61	#define FSE_GET_FLAGS(type) (((type) >> 12) & 0x000f)
	62
	63	#define FSE_COMBINED_EVENTS 0x0001
	64	#define FSE_CONTAINS_DROPPED_EVENTS 0x0002
	65
	66
91447636 A	67	// Actions for each event type
	68	#define FSE_IGNORE 0
	69	#define FSE_REPORT 1
	70	#define FSE_ASK 2 // Not implemented yet
	71
	72	// The types of each of the arguments for an event
	73	// Each type is followed by the size and then the
	74	// data. FSE_ARG_VNODE is just a path string
	75	#define FSE_ARG_VNODE 0x0001 // next arg is a vnode pointer
	76	#define FSE_ARG_STRING 0x0002 // next arg is length followed by string ptr
	77	#define FSE_ARG_PATH 0x0003 // next arg is a full path
	78	#define FSE_ARG_INT32 0x0004 // next arg is a 32-bit int
	79	#define FSE_ARG_INT64 0x0005 // next arg is a 64-bit int
	80	#define FSE_ARG_RAW 0x0006 // next arg is a length followed by a void ptr
	81	#define FSE_ARG_INO 0x0007 // next arg is the inode number (ino_t)
	82	#define FSE_ARG_UID 0x0008 // next arg is the file's uid (uid_t)
	83	#define FSE_ARG_DEV 0x0009 // next arg is the file's dev_t
	84	#define FSE_ARG_MODE 0x000a // next arg is the file's mode (as an int32, file type only)
	85	#define FSE_ARG_GID 0x000b // next arg is the file's gid (gid_t)
2d21ac55	86	#define FSE_ARG_FINFO 0x000c // next arg is a packed finfo (dev, ino, mode, uid, gid)
91447636 A	87	#define FSE_ARG_DONE 0xb33f // no more arguments
	88
	89	#define FSE_MAX_ARGS 12
	90
2d21ac55 A	91	//
	92	// These are special bits that be set in the 32-bit mode
	93	// field that /dev/fsevents provides.
	94	//
	95	#define FSE_MODE_HLINK (1 << 31) // notification is for a hard-link
	96	#define FSE_MODE_LAST_HLINK (1 << 30) // link count == 0 on a hard-link delete
b0d623f7 A	97	#define FSE_REMOTE_DIR_EVENT (1 << 29) // this is a remotely generated directory-level granularity event
b0d623f7 A	98	#define FSE_TRUNCATED_PATH (1 << 28) // the path for this item had to be truncated
91447636 A	99
91447636 A	100	// ioctl's on /dev/fsevents
b0d623f7	101	#if __LP64__
2d21ac55 A	102	typedef struct fsevent_clone_args {
	103	int8_t *event_list;
	104	int32_t num_events;
	105	int32_t event_queue_depth;
	106	int32_t *fd;
	107	} fsevent_clone_args;
	108	#else
91447636 A	109	typedef struct fsevent_clone_args {
91447636 A	110	int8_t *event_list;
2d21ac55	111	int32_t pad1;
91447636 A	112	int32_t num_events;
	113	int32_t event_queue_depth;
	114	int32_t *fd;
2d21ac55	115	int32_t pad2;
91447636	116	} fsevent_clone_args;
2d21ac55	117	#endif
91447636	118
2d21ac55	119	#define FSEVENTS_CLONE _IOW('s', 1, fsevent_clone_args)
91447636 A	120
	121
	122	// ioctl's on the cloned fd
b0d623f7 A	123	#if __LP64__
b0d623f7 A	124	#pragma pack(push, 4)
2d21ac55 A	125	typedef struct fsevent_dev_filter_args {
	126	uint32_t num_devices;
	127	dev_t *devices;
	128	} fsevent_dev_filter_args;
b0d623f7	129	#pragma pack(pop)
2d21ac55	130	#else
91447636 A	131	typedef struct fsevent_dev_filter_args {
	132	uint32_t num_devices;
	133	dev_t *devices;
2d21ac55	134	int32_t pad1;
91447636	135	} fsevent_dev_filter_args;
2d21ac55	136	#endif
91447636	137
2d21ac55 A	138	#define FSEVENTS_DEVICE_FILTER _IOW('s', 100, fsevent_dev_filter_args)
	139	#define FSEVENTS_WANT_COMPACT_EVENTS _IO('s', 101)
	140	#define FSEVENTS_WANT_EXTENDED_INFO _IO('s', 102)
b0d623f7	141	#define FSEVENTS_GET_CURRENT_ID _IOR('s', 103, uint64_t)
91447636 A	142
	143
	144	#ifdef KERNEL
	145
2d21ac55	146	void fsevents_init(void);
91447636 A	147	int need_fsevent(int type, vnode_t vp);
	148	int add_fsevent(int type, vfs_context_t, ...);
	149	void fsevent_unmount(struct mount *mp);
b0d623f7 A	150	struct vnode_attr;
b0d623f7 A	151	void create_fsevent_from_kevent(vnode_t vp, uint32_t kevents, struct vnode_attr *vap);
91447636 A	152
	153	// misc utility functions for fsevent info and pathbuffers...
	154	typedef struct fse_info {
2d21ac55	155	ino64_t ino;
91447636	156	dev_t dev;
91447636 A	157	int32_t mode; // note: this is not a mode_t (it's 32-bits, not 16)
	158	uid_t uid;
	159	gid_t gid;
2d21ac55	160	uint64_t nlink; // only filled in if the vnode is marked as a hardlink
91447636 A	161	} fse_info;
	162
	163	int get_fse_info(struct vnode vp, fse_info fse, vfs_context_t ctx);
6d2010ae	164	int vnode_get_fse_info_from_vap(vnode_t vp, fse_info fse, struct vnode_attr vap);
91447636 A	165
	166	char *get_pathbuff(void);
	167	void release_pathbuff(char *path);
	168
	169	#endif /* KERNEL */
	170
	171	#endif /* FSEVENT_H */