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	1	/*
	2	* Copyright (c) 1999-2007 Apple 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	*/
	28	/*
	29	* Header file for Unified Buffer Cache.
	30	*
	31	*/
	32
	33	#ifndef _SYS_UBC_H_
	34	#define _SYS_UBC_H_
	35
	36	#include <sys/appleapiopts.h>
	37	#include <sys/cdefs.h>
	38	#include <sys/kernel_types.h>
	39	#include <kern/locks.h>
	40	#include <mach/memory_object_types.h>
	41	#include <sys/ucred.h>
	42
	43	/* defns for ubc_msync() and ubc_msync */
	44
	45	#define UBC_PUSHDIRTY 0x01 /* clean any dirty pages in the specified range to the backing store */
	46	#define UBC_PUSHALL 0x02 /* push both dirty and precious pages to the backing store */
	47	#define UBC_INVALIDATE 0x04 /* invalidate pages in the specified range... may be used with UBC_PUSHDIRTY/ALL */
	48	#define UBC_SYNC 0x08 /* wait for I/Os generated by UBC_PUSHDIRTY to complete */
	49
	50	__BEGIN_DECLS
	51
	52	off_t ubc_blktooff(struct vnode *, daddr64_t);
	53	daddr64_t ubc_offtoblk(struct vnode *, off_t);
	54	off_t ubc_getsize(struct vnode *);
	55	int ubc_setsize(struct vnode *, off_t);
	56
	57	#ifdef KERNEL_PRIVATE
	58
	59	enum {
	60	UBC_SETSIZE_NO_FS_REENTRY = 1
	61	};
	62	typedef uint32_t ubc_setsize_opts_t;
	63
	64	errno_t ubc_setsize_ex(vnode_t vp, off_t nsize, ubc_setsize_opts_t opts);
	65
	66	#endif // KERNEL_PRIVATE
	67
	68	kauth_cred_t ubc_getcred(struct vnode *);
	69	struct thread;
	70	int ubc_setthreadcred(struct vnode , struct proc , struct thread *);
	71
	72	errno_t ubc_msync(vnode_t, off_t, off_t, off_t *, int);
	73	int ubc_pages_resident(vnode_t);
	74	int ubc_page_op(vnode_t, off_t, int, ppnum_t , int );
	75	int ubc_range_op(vnode_t, off_t, off_t, int, int *);
	76
	77	#ifdef KERNEL_PRIVATE
	78	/* This API continues to exist only until <rdar://4714366> is resolved */
	79	int ubc_setcred(struct vnode , struct proc ) __deprecated;
	80	/* code signing */
	81	struct cs_blob;
	82	struct cs_blob *ubc_cs_blob_get(vnode_t, cpu_type_t, off_t);
	83
	84	/* apis to handle generation count for cs blob */
	85	void cs_blob_reset_cache(void);
	86	int ubc_cs_blob_revalidate(vnode_t, struct cs_blob *, int);
	87	int ubc_cs_generation_check(vnode_t);
	88
	89	int cs_entitlements_blob_get(proc_t, void *, size_t );
	90	int cs_blob_get(proc_t, void *, size_t );
	91	const char *cs_identity_get(proc_t);
	92
	93	#endif
	94
	95	/* cluster IO routines */
	96	int advisory_read(vnode_t, off_t, off_t, int);
	97	int advisory_read_ext(vnode_t, off_t, off_t, int, int ()(buf_t, void ), void *, int);
	98
	99	int cluster_read(vnode_t, struct uio *, off_t, int);
	100	int cluster_read_ext(vnode_t, struct uio , off_t, int, int ()(buf_t, void ), void );
	101
	102	int cluster_write(vnode_t, struct uio *, off_t, off_t, off_t, off_t, int);
	103	int cluster_write_ext(vnode_t, struct uio , off_t, off_t, off_t, off_t, int, int ()(buf_t, void ), void );
	104
	105	int cluster_pageout(vnode_t, upl_t, upl_offset_t, off_t, int, off_t, int);
	106	int cluster_pageout_ext(vnode_t, upl_t, upl_offset_t, off_t, int, off_t, int, int ()(buf_t, void ), void *);
	107
	108	int cluster_pagein(vnode_t, upl_t, upl_offset_t, off_t, int, off_t, int);
	109	int cluster_pagein_ext(vnode_t, upl_t, upl_offset_t, off_t, int, off_t, int, int ()(buf_t, void ), void *);
	110
	111	int cluster_push(vnode_t, int);
	112	int cluster_push_ext(vnode_t, int, int ()(buf_t, void ), void *);
	113
	114	int cluster_bp(buf_t);
	115	int cluster_bp_ext(buf_t, int ()(buf_t, void ), void *);
	116
	117	void cluster_zero(upl_t, upl_offset_t, int, buf_t);
	118
	119	int cluster_copy_upl_data(uio_t, upl_t, int, int *);
	120	int cluster_copy_ubc_data(vnode_t, uio_t, int *, int);
	121
	122	typedef struct cl_direct_read_lock cl_direct_read_lock_t;
	123	cl_direct_read_lock_t *cluster_lock_direct_read(vnode_t vp, lck_rw_type_t exclusive);
	124	void cluster_unlock_direct_read(cl_direct_read_lock_t *lck);
	125
	126	/* UPL routines */
	127	int ubc_create_upl(vnode_t, off_t, int, upl_t , upl_page_info_t *, int);
	128	int ubc_upl_map(upl_t, vm_offset_t *);
	129	int ubc_upl_unmap(upl_t);
	130	int ubc_upl_commit(upl_t);
	131	int ubc_upl_commit_range(upl_t, upl_offset_t, upl_size_t, int);
	132	int ubc_upl_abort(upl_t, int);
	133	int ubc_upl_abort_range(upl_t, upl_offset_t, upl_size_t, int);
	134	void ubc_upl_range_needed(upl_t, int, int);
	135
	136	upl_page_info_t *ubc_upl_pageinfo(upl_t);
	137	upl_size_t ubc_upl_maxbufsize(void);
	138
	139	int is_file_clean(vnode_t, off_t);
	140
	141	errno_t mach_to_bsd_errno(kern_return_t mach_err);
	142
	143	__END_DECLS
	144
	145	#endif /* _SYS_UBC_H_ */
	146