176 lines
4.4 KiB
C
176 lines
4.4 KiB
C
/*
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*
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* Coda: an Experimental Distributed File System
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* Release 3.1
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*
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* Copyright (c) 1987-1998 Carnegie Mellon University
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* All Rights Reserved
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation, and
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* that credit is given to Carnegie Mellon University in all documents
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* and publicity pertaining to direct or indirect use of this code or its
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* derivatives.
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*
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* CODA IS AN EXPERIMENTAL SOFTWARE SYSTEM AND IS KNOWN TO HAVE BUGS,
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* SOME OF WHICH MAY HAVE SERIOUS CONSEQUENCES. CARNEGIE MELLON ALLOWS
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* FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION. CARNEGIE MELLON
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* DISCLAIMS ANY LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER
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* RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OF THIS SOFTWARE OR OF
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* ANY DERIVATIVE WORK.
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*
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* Carnegie Mellon encourages users of this software to return any
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* improvements or extensions that they make, and to grant Carnegie
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* Mellon the rights to redistribute these changes without encumbrance.
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*
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* @(#) src/sys/coda/coda_fbsd.cr,v 1.1.1.1 1998/08/29 21:14:52 rvb Exp $
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* $FreeBSD$
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*
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*/
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#include "vcoda.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/fcntl.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/ucred.h>
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#include <sys/vnode.h>
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#include <vm/vm.h>
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#include <vm/vnode_pager.h>
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#include <coda/coda.h>
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#include <coda/cnode.h>
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#include <coda/coda_vnops.h>
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#include <coda/coda_psdev.h>
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/*
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From: "Jordan K. Hubbard" <jkh@time.cdrom.com>
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Subject: Re: New 3.0 SNAPshot CDROM about ready for production..
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To: "Robert.V.Baron" <rvb@GLUCK.CODA.CS.CMU.EDU>
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Date: Fri, 20 Feb 1998 15:57:01 -0800
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> Also I need a character device major number. (and might want to reserve
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> a block of 10 syscalls.)
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Just one char device number? No block devices? Very well, cdev 93 is yours!
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*/
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#define VC_DEV_NO 93
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static struct cdevsw codadevsw = {
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/* open */ vc_nb_open,
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/* close */ vc_nb_close,
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/* read */ vc_nb_read,
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/* write */ vc_nb_write,
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/* ioctl */ vc_nb_ioctl,
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/* poll */ vc_nb_poll,
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/* mmap */ nommap,
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/* strategy */ nostrategy,
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/* name */ "Coda",
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/* maj */ VC_DEV_NO,
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/* dump */ nodump,
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/* psize */ nopsize,
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/* flags */ 0,
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};
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int vcdebug = 1;
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#define VCDEBUG if (vcdebug) printf
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static int
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codadev_modevent(module_t mod, int type, void *data)
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{
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switch (type) {
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case MOD_LOAD:
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cdevsw_add(&codadevsw);
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break;
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case MOD_UNLOAD:
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break;
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default:
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break;
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}
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return 0;
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}
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static moduledata_t codadev_mod = {
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"codadev",
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codadev_modevent,
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NULL
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};
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DECLARE_MODULE(codadev, codadev_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE+VC_DEV_NO);
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int
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coda_fbsd_getpages(v)
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void *v;
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{
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struct vop_getpages_args *ap = v;
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int ret = 0;
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#if 1
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return vop_stdgetpages(ap);
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#else
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{
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struct vnode *vp = ap->a_vp;
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struct cnode *cp = VTOC(vp);
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struct vnode *cfvp = cp->c_ovp;
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int opened_internally = 0;
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struct ucred *cred = (struct ucred *) 0;
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struct proc *p = curproc;
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int error = 0;
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if (IS_CTL_VP(vp)) {
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return(EINVAL);
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}
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/* Redirect the request to UFS. */
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if (cfvp == NULL) {
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opened_internally = 1;
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error = VOP_OPEN(vp, FREAD, cred, p);
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printf("coda_getp: Internally Opening %p\n", vp);
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if (error) {
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printf("coda_getpage: VOP_OPEN on container failed %d\n", error);
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return (error);
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}
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if (vp->v_type == VREG) {
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error = vfs_object_create(vp, p, cred);
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if (error != 0) {
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printf("coda_getpage: vfs_object_create() returns %d\n", error);
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vput(vp);
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return(error);
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}
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}
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cfvp = cp->c_ovp;
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} else {
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printf("coda_getp: has container %p\n", cfvp);
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}
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printf("coda_fbsd_getpages: using container ");
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/*
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error = vnode_pager_generic_getpages(cfvp, ap->a_m, ap->a_count,
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ap->a_reqpage);
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*/
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error = VOP_GETPAGES(cfvp, ap->a_m, ap->a_count,
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ap->a_reqpage, ap->a_offset);
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printf("error = %d\n", error);
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/* Do an internal close if necessary. */
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if (opened_internally) {
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(void)VOP_CLOSE(vp, FREAD, cred, p);
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}
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return(error);
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}
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#endif
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}
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