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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.
*/
/* $Header: /afs/cs/project/coda-src/cvs/coda/kernel-src/vfs/freebsd/cfs/cfs_fbsd.c,v 1.6 1998/08/28 18:12:11 rvb Exp $ */
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/fcntl.h>
#include <sys/ucred.h>
#include <sys/malloc.h>
#include <vm/vm.h>
#include <vm/vnode_pager.h>
#ifdef DEVFS
#include <sys/devfsext.h>
#endif
#include <sys/conf.h>
#include <sys/vnode.h>
#include <cfs/coda.h>
#include <cfs/cnode.h>
#include <cfs/cfs_vnodeops.h>
/*
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
#ifdef __FreeBSD_version
/* 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 };
#else
/* Type of device methods. */
#define D_OPEN_T d_open_t
#define D_CLOSE_T d_close_t
#define D_RDWR_T d_rdwr_t
#define D_READ_T d_read_t
#define D_WRITE_T d_write_t
#define D_IOCTL_T d_ioctl_t
#define D_SELECT_T d_select_t
/* rvb why */
D_OPEN_T vc_nb_open; /* was is defined in cfs_FreeBSD.h */
D_CLOSE_T vc_nb_close;
D_READ_T vc_nb_read;
D_WRITE_T vc_nb_write;
D_IOCTL_T vc_nb_ioctl;
D_SELECT_T vc_nb_select;
static struct cdevsw vccdevsw =
{
vc_nb_open, vc_nb_close, vc_nb_read, vc_nb_write,
vc_nb_ioctl, nostop, nullreset, nodevtotty,
vc_nb_select, nommap, NULL, "Coda", NULL, -1 };
PSEUDO_SET(vcattach, vc);
#endif
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("cfs: vccdevsw entry installed at %d.\n", major(vccdev));
}
void
cvref(vp)
struct vnode *vp;
{
if (vp->v_usecount <= 0)
panic("vref used where vget required");
vp->v_usecount++;
}
#ifdef __FreeBSD_version
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
cfs_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("cfs_getp: Internally Opening %p\n", vp);
if (error) {
printf("cfs_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("cfs_getpage: vfs_object_create() returns %d\n", error);
vput(vp);
return(error);
}
}
cfvp = cp->c_ovp;
} else {
printf("cfs_getp: has container %p\n", cfvp);
}
printf("cfs_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
cfs_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)
#endif
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