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

/*
 * Copyright (c) 1999, 2000-2002 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
 * 
 * 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. 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_LICENSE_HEADER_END@
 */
/* 
 *	File:	ubc.h
 *	Author:	Umesh Vaishampayan [umeshv@apple.com]
 *		05-Aug-1999	umeshv	Created.
 *
 *	Header file for Unified Buffer Cache.
 *
 */ 

#ifndef	_SYS_UBC_H_
#define	_SYS_UBC_H_

#include <sys/appleapiopts.h>
#include <sys/types.h>
#include <sys/ucred.h>
#include <sys/vnode.h>

#include <sys/cdefs.h>

#include <mach/memory_object_types.h>

#define UBC_INFO_NULL	((struct ubc_info *) 0)
#define UBC_NOINFO		((struct ubc_info *)0xDEADD1ED)

#ifdef __APPLE_API_PRIVATE
extern struct zone	*ubc_info_zone;

/*
 *	The following data structure keeps the information to associate
 *	a vnode to the correspondig VM objects.
 */

struct ubc_info {
	memory_object_t			ui_pager;	/* pager */
	memory_object_control_t	ui_control;	/* VM control for the pager */
	long					ui_flags;	/* flags */
	struct vnode 			*ui_vnode;	/* The vnode for this ubc_info */
	struct ucred 			*ui_ucred;	/* holds credentials for NFS paging */
	int						ui_refcount;/* ref count on the ubc_info */
	off_t					ui_size;	/* file size for the vnode */
	long					ui_mapped;	/* is it currently mapped */
	void					*ui_owner;	/* for recursive ubc_busy */
};

/* Defines for ui_flags */
#define	UI_NONE			0x00000000		/* none */
#define	UI_HASPAGER		0x00000001		/* has a pager associated */
#define	UI_INITED		0x00000002		/* newly initialized vnode */
#define UI_HASOBJREF	0x00000004		/* hold a reference on object */
#define UI_WASMAPPED	0x00000008		/* vnode was mapped */
#define	UI_DONTCACHE	0x00000010		/* do not cache object */
#define	UI_BUSY			0x00000020		/* for VM synchronization */
#define	UI_WANTED		0x00000040		/* for VM synchronization */

#endif /* __APPLE_API_PRIVATE */

#ifdef __APPLE_API_EVOLVING
/*
 * exported primitives for loadable file systems.
 */

__BEGIN_DECLS
int	ubc_info_init __P((struct vnode *));
void	ubc_info_deallocate  __P((struct ubc_info *));
int	ubc_setsize __P((struct vnode *, off_t));
off_t	ubc_getsize __P((struct vnode *));
int	ubc_uncache __P((struct vnode *));
int	ubc_umount __P((struct mount *));
void	ubc_unmountall __P(());
int	ubc_setcred __P((struct vnode *, struct proc *));
struct ucred *ubc_getcred __P((struct vnode *));
memory_object_t ubc_getpager __P((struct vnode *));
memory_object_control_t ubc_getobject __P((struct vnode *, int));
int ubc_setpager __P((struct vnode *, memory_object_t));
int ubc_setflags __P((struct vnode *, int));
int ubc_clearflags __P((struct vnode *, int));
int ubc_issetflags __P((struct vnode *, int));
off_t ubc_blktooff __P((struct vnode *, daddr_t));
daddr_t ubc_offtoblk __P((struct vnode *, off_t));
int ubc_clean __P((struct vnode *, int));
int	ubc_pushdirty __P((struct vnode *));
int	ubc_pushdirty_range __P((struct vnode *, off_t, off_t));
int ubc_hold __P((struct vnode *));
void ubc_rele __P((struct vnode *));
void ubc_map __P((struct vnode *));
int	ubc_destroy_named __P((struct vnode *));
int	ubc_release_named __P((struct vnode *));
int	ubc_invalidate __P((struct vnode *, off_t, size_t));
int	ubc_isinuse __P((struct vnode *, int));

int	ubc_page_op __P((struct vnode *, off_t, int, vm_offset_t *, int *));

/* cluster IO routines */
int	cluster_read __P((struct vnode *, struct uio *, off_t, int, int));
int	advisory_read __P((struct vnode *, off_t, off_t, int, int));
int	cluster_write __P((struct vnode *, struct uio*, off_t, off_t,
		off_t, off_t,  int, int));
int	cluster_push __P((struct vnode *));
int	cluster_pageout __P((struct vnode *, upl_t, vm_offset_t, off_t, int,
		off_t, int, int));
int	cluster_pagein __P((struct vnode *, upl_t, vm_offset_t, off_t, int,
		off_t, int, int));
int	cluster_bp __P((struct buf *));

/* UPL routines */
int	ubc_create_upl __P((struct vnode *, off_t, long, upl_t *,
		upl_page_info_t **, int));
int ubc_upl_map __P((upl_t, vm_offset_t *));
int ubc_upl_unmap __P((upl_t));
int ubc_upl_commit __P((upl_t));
int ubc_upl_commit_range __P((upl_t, vm_offset_t, vm_size_t, int));
int ubc_upl_abort __P((upl_t, int));
int ubc_upl_abort_range __P((upl_t, vm_offset_t, vm_size_t, int));
upl_page_info_t *ubc_upl_pageinfo __P((upl_t));
__END_DECLS

#define UBCINFOMISSING(vp) \
	((vp) && ((vp)->v_type == VREG) && ((vp)->v_ubcinfo == UBC_INFO_NULL))

#define UBCINFORECLAIMED(vp) \
	((vp) && ((vp)->v_type == VREG) && ((vp)->v_ubcinfo == UBC_NOINFO))

#define UBCINFOEXISTS(vp) \
	((vp) && ((vp)->v_type == VREG) && \
		((vp)->v_ubcinfo) && ((vp)->v_ubcinfo != UBC_NOINFO))

#define UBCISVALID(vp) \
	((vp) && ((vp)->v_type == VREG) && !((vp)->v_flag & VSYSTEM))

#define UBCINVALID(vp) \
	(((vp) == NULL) || ((vp) && ((vp)->v_type != VREG))     \
		|| ((vp) && ((vp)->v_flag & VSYSTEM)))

#define UBCINFOCHECK(fun, vp)  \
	if ((vp) && ((vp)->v_type == VREG) &&   \
			(((vp)->v_ubcinfo == UBC_INFO_NULL)     \
			|| ((vp)->v_ubcinfo == UBC_NOINFO))) \
		panic("%s: lost ubc_info", (fun));

/* Flags for ubc_getobject() */
#define UBC_FLAGS_NONE		0x0000
#define UBC_HOLDOBJECT		0x0001

#endif /* __APPLE_API_EVOLVING */

#endif	/* _SYS_UBC_H_ */
Commit	Line	Data
1c79356b	1	/*
9bccf70c	2	* Copyright (c) 1999, 2000-2002 Apple Computer, Inc. All rights reserved.
1c79356b A	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
43866e37	6	* Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
1c79356b	7	*
43866e37 A	8	* This file contains Original Code and/or Modifications of Original Code
	9	* as defined in and that are subject to the Apple Public Source License
	10	* Version 2.0 (the 'License'). You may not use this file except in
	11	* compliance with the License. Please obtain a copy of the License at
	12	* http://www.opensource.apple.com/apsl/ and read it before using this
	13	* file.
	14	*
	15	* The Original Code and all software distributed under the License are
	16	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
1c79356b A	17	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
1c79356b A	18	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
43866e37 A	19	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	20	* Please see the License for the specific language governing rights and
	21	* limitations under the License.
1c79356b A	22	*
	23	* @APPLE_LICENSE_HEADER_END@
	24	*/
	25	/*
	26	* File: ubc.h
	27	* Author: Umesh Vaishampayan [umeshv@apple.com]
	28	* 05-Aug-1999 umeshv Created.
	29	*
	30	* Header file for Unified Buffer Cache.
	31	*
	32	*/
	33
	34	#ifndef _SYS_UBC_H_
	35	#define _SYS_UBC_H_
	36
9bccf70c	37	#include <sys/appleapiopts.h>
1c79356b A	38	#include <sys/types.h>
	39	#include <sys/ucred.h>
	40	#include <sys/vnode.h>
	41
	42	#include <sys/cdefs.h>
	43
	44	#include <mach/memory_object_types.h>
	45
	46	#define UBC_INFO_NULL ((struct ubc_info *) 0)
	47	#define UBC_NOINFO ((struct ubc_info *)0xDEADD1ED)
	48
9bccf70c	49	#ifdef __APPLE_API_PRIVATE
1c79356b A	50	extern struct zone *ubc_info_zone;
	51
	52	/*
	53	* The following data structure keeps the information to associate
	54	* a vnode to the correspondig VM objects.
	55	*/
	56
	57	struct ubc_info {
0b4e3aa0 A	58	memory_object_t ui_pager; /* pager */
	59	memory_object_control_t ui_control; /* VM control for the pager */
	60	long ui_flags; /* flags */
	61	struct vnode ui_vnode; / The vnode for this ubc_info */
	62	struct ucred ui_ucred; / holds credentials for NFS paging */
	63	int ui_refcount;/* ref count on the ubc_info */
	64	off_t ui_size; /* file size for the vnode */
	65	long ui_mapped; /* is it currently mapped */
b4c24cb9	66	void ui_owner; / for recursive ubc_busy */
1c79356b A	67	};
	68
	69	/* Defines for ui_flags */
	70	#define UI_NONE 0x00000000 /* none */
	71	#define UI_HASPAGER 0x00000001 /* has a pager associated */
	72	#define UI_INITED 0x00000002 /* newly initialized vnode */
	73	#define UI_HASOBJREF 0x00000004 /* hold a reference on object */
	74	#define UI_WASMAPPED 0x00000008 /* vnode was mapped */
	75	#define UI_DONTCACHE 0x00000010 /* do not cache object */
b4c24cb9 A	76	#define UI_BUSY 0x00000020 /* for VM synchronization */
b4c24cb9 A	77	#define UI_WANTED 0x00000040 /* for VM synchronization */
1c79356b	78
9bccf70c A	79	#endif /* __APPLE_API_PRIVATE */
	80
	81	#ifdef __APPLE_API_EVOLVING
1c79356b A	82	/*
	83	* exported primitives for loadable file systems.
	84	*/
	85
	86	__BEGIN_DECLS
	87	int ubc_info_init __P((struct vnode *));
0b4e3aa0	88	void ubc_info_deallocate __P((struct ubc_info *));
1c79356b A	89	int ubc_setsize __P((struct vnode *, off_t));
	90	off_t ubc_getsize __P((struct vnode *));
	91	int ubc_uncache __P((struct vnode *));
	92	int ubc_umount __P((struct mount *));
	93	void ubc_unmountall __P(());
	94	int ubc_setcred __P((struct vnode , struct proc ));
	95	struct ucred ubc_getcred __P((struct vnode ));
0b4e3aa0 A	96	memory_object_t ubc_getpager __P((struct vnode *));
	97	memory_object_control_t ubc_getobject __P((struct vnode *, int));
	98	int ubc_setpager __P((struct vnode *, memory_object_t));
1c79356b A	99	int ubc_setflags __P((struct vnode *, int));
	100	int ubc_clearflags __P((struct vnode *, int));
	101	int ubc_issetflags __P((struct vnode *, int));
	102	off_t ubc_blktooff __P((struct vnode *, daddr_t));
	103	daddr_t ubc_offtoblk __P((struct vnode *, off_t));
	104	int ubc_clean __P((struct vnode *, int));
	105	int ubc_pushdirty __P((struct vnode *));
0b4e3aa0	106	int ubc_pushdirty_range __P((struct vnode *, off_t, off_t));
1c79356b A	107	int ubc_hold __P((struct vnode *));
	108	void ubc_rele __P((struct vnode *));
	109	void ubc_map __P((struct vnode *));
0b4e3aa0 A	110	int ubc_destroy_named __P((struct vnode *));
0b4e3aa0 A	111	int ubc_release_named __P((struct vnode *));
1c79356b A	112	int ubc_invalidate __P((struct vnode *, off_t, size_t));
	113	int ubc_isinuse __P((struct vnode *, int));
	114
de355530	115	int ubc_page_op __P((struct vnode , off_t, int, vm_offset_t , int *));
0b4e3aa0	116
1c79356b A	117	/* cluster IO routines */
	118	int cluster_read __P((struct vnode , struct uio , off_t, int, int));
	119	int advisory_read __P((struct vnode *, off_t, off_t, int, int));
	120	int cluster_write __P((struct vnode , struct uio, off_t, off_t,
	121	off_t, off_t, int, int));
	122	int cluster_push __P((struct vnode *));
	123	int cluster_pageout __P((struct vnode *, upl_t, vm_offset_t, off_t, int,
	124	off_t, int, int));
	125	int cluster_pagein __P((struct vnode *, upl_t, vm_offset_t, off_t, int,
	126	off_t, int, int));
	127	int cluster_bp __P((struct buf *));
0b4e3aa0 A	128
	129	/* UPL routines */
	130	int ubc_create_upl __P((struct vnode , off_t, long, upl_t ,
	131	upl_page_info_t **, int));
	132	int ubc_upl_map __P((upl_t, vm_offset_t *));
	133	int ubc_upl_unmap __P((upl_t));
	134	int ubc_upl_commit __P((upl_t));
	135	int ubc_upl_commit_range __P((upl_t, vm_offset_t, vm_size_t, int));
	136	int ubc_upl_abort __P((upl_t, int));
	137	int ubc_upl_abort_range __P((upl_t, vm_offset_t, vm_size_t, int));
	138	upl_page_info_t *ubc_upl_pageinfo __P((upl_t));
1c79356b A	139	__END_DECLS
	140
	141	#define UBCINFOMISSING(vp) \
	142	((vp) && ((vp)->v_type == VREG) && ((vp)->v_ubcinfo == UBC_INFO_NULL))
	143
	144	#define UBCINFORECLAIMED(vp) \
	145	((vp) && ((vp)->v_type == VREG) && ((vp)->v_ubcinfo == UBC_NOINFO))
	146
	147	#define UBCINFOEXISTS(vp) \
	148	((vp) && ((vp)->v_type == VREG) && \
	149	((vp)->v_ubcinfo) && ((vp)->v_ubcinfo != UBC_NOINFO))
	150
	151	#define UBCISVALID(vp) \
	152	((vp) && ((vp)->v_type == VREG) && !((vp)->v_flag & VSYSTEM))
	153
	154	#define UBCINVALID(vp) \
	155	(((vp) == NULL) \|\| ((vp) && ((vp)->v_type != VREG)) \
	156	\|\| ((vp) && ((vp)->v_flag & VSYSTEM)))
	157
	158	#define UBCINFOCHECK(fun, vp) \
	159	if ((vp) && ((vp)->v_type == VREG) && \
	160	(((vp)->v_ubcinfo == UBC_INFO_NULL) \
	161	\|\| ((vp)->v_ubcinfo == UBC_NOINFO))) \
	162	panic("%s: lost ubc_info", (fun));
	163
	164	/* Flags for ubc_getobject() */
0b4e3aa0	165	#define UBC_FLAGS_NONE 0x0000
1c79356b	166	#define UBC_HOLDOBJECT 0x0001
1c79356b	167
9bccf70c A	168	#endif /* __APPLE_API_EVOLVING */
9bccf70c A	169
1c79356b A	170	#endif /* _SYS_UBC_H_ */
1c79356b A	171