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/*
*
* Coda: an Experimental Distributed File System
* Release 3.1
*
* Copyright (c) 1987-1998 Carnegie Mellon University
* All Rights Reserved
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation, and
* that credit is given to Carnegie Mellon University in all documents
* and publicity pertaining to direct or indirect use of this code or its
* derivatives.
*
* CODA IS AN EXPERIMENTAL SOFTWARE SYSTEM AND IS KNOWN TO HAVE BUGS,
* SOME OF WHICH MAY HAVE SERIOUS CONSEQUENCES. CARNEGIE MELLON ALLOWS
* FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION. CARNEGIE MELLON
* DISCLAIMS ANY LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER
* RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OF THIS SOFTWARE OR OF
* ANY DERIVATIVE WORK.
*
* Carnegie Mellon encourages users of this software to return any
* improvements or extensions that they make, and to grant Carnegie
* Mellon the rights to redistribute these changes without encumbrance.
*
* @(#) src/sys/cfs/cfs_fbsd.c,v 1.1.1.1 1998/08/29 21:14:52 rvb Exp $
* $Id: cfs_fbsd.c,v 1.2 1998/09/02 19:09:53 rvb Exp $
*
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/malloc.h>
#include <sys/fcntl.h>
#include <sys/ucred.h>
#include <sys/vnode.h>
#include <sys/conf.h>
#include <vm/vm.h>
#include <vm/vnode_pager.h>
#include <cfs/coda.h>
#include <cfs/cnode.h>
#include <cfs/cfs_vnodeops.h>
#ifdef DEVFS
#include <sys/devfsext.h>
#endif
/*
From: "Jordan K. Hubbard" <jkh@time.cdrom.com>
Subject: Re: New 3.0 SNAPshot CDROM about ready for production..
To: "Robert.V.Baron" <rvb@GLUCK.CODA.CS.CMU.EDU>
Date: Fri, 20 Feb 1998 15:57:01 -0800
> Also I need a character device major number. (and might want to reserve
> a block of 10 syscalls.)
Just one char device number? No block devices? Very well, cdev 93 is yours!
*/
#define VC_DEV_NO 93
/* Type of device methods. */
extern d_open_t vc_nb_open;
extern d_close_t vc_nb_close;
extern d_read_t vc_nb_read;
extern d_write_t vc_nb_write;
extern d_ioctl_t vc_nb_ioctl;
extern d_poll_t vc_nb_poll;
static struct cdevsw vccdevsw =
{
vc_nb_open, vc_nb_close, vc_nb_read, vc_nb_write, /*93*/
vc_nb_ioctl, nostop, nullreset, nodevtotty,
vc_nb_poll, nommap, NULL, "Coda", NULL, -1
};
void vcattach __P((void));
static dev_t vccdev;
int vcdebug = 1;
#define VCDEBUG if (vcdebug) printf
void
vcattach(void)
{
/*
* In case we are an LKM, set up device switch.
*/
if (0 == (vccdev = makedev(VC_DEV_NO, 0)))
VCDEBUG("makedev returned null\n");
else
VCDEBUG("makedev OK.\n");
cdevsw_add(&vccdev, &vccdevsw, NULL);
VCDEBUG("coda: vccdevsw entry installed at %d.\n", major(vccdev));
}
static vc_devsw_installed = 0;
static void vc_drvinit __P((void *unused));
static void
vc_drvinit(void *unused)
{
dev_t dev;
if( ! vc_devsw_installed ) {
dev = makedev(VC_DEV_NO, 0);
cdevsw_add(&dev,&vccdevsw, NULL);
vc_devsw_installed = 1;
}
}
int
coda_fbsd_getpages(v)
void *v;
{
struct vop_getpages_args *ap = v;
struct vnode *vp = ap->a_vp;
struct cnode *cp = VTOC(vp);
int ret = 0;
#if 1
/*??? a_offset */
ret = vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count,
ap->a_reqpage);
return ret;
#else
{
struct vnode *vp = ap->a_vp;
struct cnode *cp = VTOC(vp);
struct vnode *cfvp = cp->c_ovp;
int opened_internally = 0;
struct ucred *cred = (struct ucred *) 0;
struct proc *p = curproc;
int error = 0;
if (IS_CTL_VP(vp)) {
return(EINVAL);
}
/* Redirect the request to UFS. */
if (cfvp == NULL) {
opened_internally = 1;
error = VOP_OPEN(vp, FREAD, cred, p);
printf("coda_getp: Internally Opening %p\n", vp);
if (error) {
printf("coda_getpage: VOP_OPEN on container failed %d\n", error);
return (error);
}
if (vp->v_type == VREG) {
error = vfs_object_create(vp, p, cred, 1);
if (error != 0) {
printf("coda_getpage: vfs_object_create() returns %d\n", error);
vput(vp);
return(error);
}
}
cfvp = cp->c_ovp;
} else {
printf("coda_getp: has container %p\n", cfvp);
}
printf("coda_fbsd_getpages: using container ");
/*
error = vnode_pager_generic_getpages(cfvp, ap->a_m, ap->a_count,
ap->a_reqpage);
*/
error = VOP_GETPAGES(cfvp, ap->a_m, ap->a_count,
ap->a_reqpage, ap->a_offset);
printf("error = %d\n", error);
/* Do an internal close if necessary. */
if (opened_internally) {
(void)VOP_CLOSE(vp, FREAD, cred, p);
}
return(error);
}
#endif
}
int
coda_fbsd_putpages(v)
void *v;
{
struct vop_putpages_args *ap = v;
/*??? a_offset */
return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count,
ap->a_sync, ap->a_rtvals);
}
SYSINIT(vccdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+VC_DEV_NO,vc_drvinit,NULL)
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