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vm_vfs.c revision 1.1 
      1 /*	$NetBSD: vm_vfs.c,v 1.1 2008/11/19 14:10:49 pooka Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2008 Antti Kantee.  All Rights Reserved.
      5  *
      6  * Development of this software was supported by the
      7  * Finnish Cultural Foundation.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
     19  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     20  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     21  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     24  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     28  * SUCH DAMAGE.
     29  */
     30 
     31 #include <sys/param.h>
     32 
     33 #include <sys/buf.h>
     34 #include <sys/vnode.h>
     35 
     36 #include <uvm/uvm.h>
     37 #include <uvm/uvm_readahead.h>
     38 
     39 static int vn_get(struct uvm_object *, voff_t, struct vm_page **,
     40 	int *, int, vm_prot_t, int, int);
     41 static int vn_put(struct uvm_object *, voff_t, voff_t, int);
     42 
     43 const struct uvm_pagerops uvm_vnodeops = {
     44 	.pgo_get = vn_get,
     45 	.pgo_put = vn_put,
     46 };
     47 
     48 /*
     49  * vnode pager
     50  */
     51 
     52 static int
     53 vn_get(struct uvm_object *uobj, voff_t off, struct vm_page **pgs,
     54 	int *npages, int centeridx, vm_prot_t access_type,
     55 	int advice, int flags)
     56 {
     57 	struct vnode *vp = (struct vnode *)uobj;
     58 
     59 	return VOP_GETPAGES(vp, off, pgs, npages, centeridx, access_type,
     60 	    advice, flags);
     61 }
     62 
     63 static int
     64 vn_put(struct uvm_object *uobj, voff_t offlo, voff_t offhi, int flags)
     65 {
     66 	struct vnode *vp = (struct vnode *)uobj;
     67 
     68 	return VOP_PUTPAGES(vp, offlo, offhi, flags);
     69 }
     70 
     71 void
     72 uvm_aio_biodone1(struct buf *bp)
     73 {
     74 
     75 	panic("%s: unimplemented", __func__);
     76 }
     77 
     78 void
     79 uvm_aio_biodone(struct buf *bp)
     80 {
     81 
     82 	uvm_aio_aiodone(bp);
     83 }
     84 
     85 void
     86 uvm_aio_aiodone(struct buf *bp)
     87 {
     88 
     89 	if (((bp->b_flags|bp->b_cflags) & (B_READ|BC_NOCACHE)) == 0 && bioopsp)
     90 		bioopsp->io_pageiodone(bp);
     91 }
     92 
     93 struct uvm_ractx *
     94 uvm_ra_allocctx()
     95 {
     96 
     97 	return NULL;
     98 }
     99 
    100 void
    101 uvm_ra_freectx(struct uvm_ractx *ra)
    102 {
    103 
    104 	return;
    105 }
    106 
    107 bool
    108 uvn_clean_p(struct uvm_object *uobj)
    109 {
    110 	struct vnode *vp = (void *)uobj;
    111 
    112 	return (vp->v_iflag & VI_ONWORKLST) == 0;
    113 }
    114