206 lines
5.2 KiB
C
206 lines
5.2 KiB
C
/*
|
|
*
|
|
* 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/coda/coda_fbsd.cr,v 1.1.1.1 1998/08/29 21:14:52 rvb Exp $
|
|
* $Id: coda_fbsd.c,v 1.3 1998/09/11 18:50:16 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 <coda/coda.h>
|
|
#include <coda/cnode.h>
|
|
#include <coda/coda_vnops.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)
|