text: /*
   * Copyright (c) 1999-2007 Apple 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@
   */
  /* 
   *	Header file for Unified Buffer Cache.
   *
   */ 
  
  #ifndef	_SYS_UBC_H_
  #define	_SYS_UBC_H_
  
  #include <sys/appleapiopts.h>
  #include <sys/cdefs.h>
  #include <sys/kernel_types.h>
  #include <kern/locks.h>
  #include <mach/memory_object_types.h>
  
  
  /* defns for ubc_sync_range() and ubc_msync */
  
  #define	UBC_PUSHDIRTY	0x01	/* clean any dirty pages in the specified range to the backing store */
  #define	UBC_PUSHALL	0x02	/* push both dirty and precious pages to the backing store */
  #define	UBC_INVALIDATE	0x04	/* invalidate pages in the specified range... may be used with UBC_PUSHDIRTY/ALL */
  #define	UBC_SYNC	0x08	/* wait for I/Os generated by UBC_PUSHDIRTY to complete */
  
  __BEGIN_DECLS
  
  off_t		ubc_blktooff(struct vnode *, daddr64_t);
  daddr64_t	ubc_offtoblk(struct vnode *, off_t);
  off_t	ubc_getsize(struct vnode *);
  int	ubc_setsize(struct vnode *, off_t);
  
  kauth_cred_t ubc_getcred(struct vnode *);
  struct thread;
  int	ubc_setthreadcred(struct vnode *, struct proc *, struct thread *);
  
  int     ubc_sync_range(vnode_t, off_t, off_t, int);
  errno_t ubc_msync(vnode_t, off_t, off_t, off_t *, int);
  int	ubc_pages_resident(vnode_t);
  int	ubc_page_op(vnode_t, off_t, int, ppnum_t *, int *);
  int	ubc_range_op(vnode_t, off_t, off_t, int, int *);
  
  
  /* cluster IO routines */
  int	advisory_read(vnode_t, off_t, off_t, int);
  int	advisory_read_ext(vnode_t, off_t, off_t, int, int (*)(buf_t, void *), void *, int);
  
  int	cluster_read(vnode_t, struct uio *, off_t, int);
  int	cluster_read_ext(vnode_t, struct uio *, off_t, int, int (*)(buf_t, void *), void *);
  
  int	cluster_write(vnode_t, struct uio *, off_t, off_t, off_t, off_t, int);
  int	cluster_write_ext(vnode_t, struct uio *, off_t, off_t, off_t, off_t, int, int (*)(buf_t, void *), void *);
  
  int	cluster_pageout(vnode_t, upl_t, upl_offset_t, off_t, int, off_t, int);
  int	cluster_pageout_ext(vnode_t, upl_t, upl_offset_t, off_t, int, off_t, int, int (*)(buf_t, void *), void *);
  
  int	cluster_pagein(vnode_t, upl_t, upl_offset_t, off_t, int, off_t, int);
  int	cluster_pagein_ext(vnode_t, upl_t, upl_offset_t, off_t, int, off_t, int, int (*)(buf_t, void *), void *);
  
  int	cluster_push(vnode_t, int);
  int	cluster_push_ext(vnode_t, int, int (*)(buf_t, void *), void *);
  
  int	cluster_bp(buf_t);
  int	cluster_bp_ext(buf_t, int (*)(buf_t, void *), void *);
  
  void	cluster_zero(upl_t, upl_offset_t, int, buf_t);
  
  int	cluster_copy_upl_data(uio_t, upl_t, int, int *);
  int	cluster_copy_ubc_data(vnode_t, uio_t, int *, int);
  
  
  /* UPL routines */
  int	ubc_create_upl(vnode_t, off_t, int, upl_t *, upl_page_info_t **, int);
  int	ubc_upl_map(upl_t, vm_offset_t *);
  int	ubc_upl_unmap(upl_t);
  int	ubc_upl_commit(upl_t);
  int	ubc_upl_commit_range(upl_t, upl_offset_t, upl_size_t, int);
  int	ubc_upl_abort(upl_t, int);
  int	ubc_upl_abort_range(upl_t, upl_offset_t, upl_size_t, int);
  void	ubc_upl_range_needed(upl_t, int, int);
  
  upl_page_info_t *ubc_upl_pageinfo(upl_t);
  upl_size_t ubc_upl_maxbufsize(void);
  
  int	is_file_clean(vnode_t, off_t);
  
  __END_DECLS
  
  #endif	/* _SYS_UBC_H_ */
  
  