include/vm/pvn.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  27 /*        All Rights Reserved   */
  28
  29 /*
  30  * University Copyright- Copyright (c) 1982, 1986, 1988
  31  * The Regents of the University of California
  32  * All Rights Reserved
  33  *
  34  * University Acknowledgment- Portions of this document are derived from
  35  * software developed by the University of California, Berkeley, and its
  36  * contributors.
  37  */
  38
  39 #ifndef _VM_PVN_H
  40 #define _VM_PVN_H
  41
  42 #include <sys/buf.h>
  43 #include <vm/seg.h>
  44
  45 #ifdef  __cplusplus
  46 extern "C" {
  47 #endif
  48
  49 #ifdef  _KERNEL
  50
  51 /*
  52  * VM - paged vnode.
  53  *
  54  * The VM system manages memory as a cache of paged vnodes.
  55  * This file desribes the interfaces to common subroutines
  56  * used to help implement the VM/file system routines.
  57  */
  58
  59 struct page     *pvn_read_kluster(struct vnode *vp, uoff_t off,
  60                         struct seg *seg, caddr_t addr, uoff_t *offp,
  61                         size_t *lenp, uoff_t vp_off, size_t vp_len,
  62                         int isra);
  63 struct page     *pvn_write_kluster(struct vnode *vp, struct page *pp,
  64                         uoff_t *offp, size_t *lenp, uoff_t vp_off,
  65                         size_t vp_len, int flags);
  66 void            pvn_read_done(struct page *plist, int flags);
  67 void            pvn_write_done(struct page *plist, int flags);
  68 void            pvn_io_done(struct page *plist);
  69 int             pvn_vplist_dirty(struct vnode *vp, uoff_t off,
  70                         int (*putapage)(vnode_t *, struct page *, uoff_t *,
  71                                 size_t *, int, cred_t *),
  72                         int flags, struct cred *cred);
  73 void            pvn_vplist_setdirty(vnode_t *vp, int (*page_check)(page_t *));
  74 int             pvn_getdirty(struct page *pp, int flags);
  75 void            pvn_vpzero(struct vnode *vp, uoff_t vplen, size_t zbytes);
  76 int             pvn_getpages(
  77                         int (*getpage)(vnode_t *, uoff_t, size_t, uint_t *,
  78                                 struct page *[], size_t, struct seg *,
  79                                 caddr_t, enum seg_rw, cred_t *),
  80                         struct vnode *vp, uoff_t off, size_t len,
  81                         uint_t *protp, struct page **pl, size_t plsz,
  82                         struct seg *seg, caddr_t addr, enum seg_rw rw,
  83                         struct cred *cred);
  84 void            pvn_plist_init(struct page *pp, struct page **pl, size_t plsz,
  85                         uoff_t off, size_t io_len, enum seg_rw rw);
  86 void            pvn_init(void);
  87
  88 #endif  /* _KERNEL */
  89
  90 #ifdef  __cplusplus
  91 }
  92 #endif
  93
  94 #endif  /* _VM_PVN_H */