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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/coda/coda_fbsd.cr,v 1.1.1.1 1998/08/29 21:14:52 rvb Exp $
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/fcntl.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/ucred.h>
#include <sys/vnode.h>
#include <vm/vm.h>
#include <vm/vnode_pager.h>
#include <coda/coda.h>
#include <coda/cnode.h>
#include <coda/coda_vnops.h>
#include <coda/coda_psdev.h>
static struct cdevsw codadevsw = {
.d_version = D_VERSION,
.d_flags = D_NEEDGIANT,
.d_open = vc_nb_open,
.d_close = vc_nb_close,
.d_read = vc_nb_read,
.d_write = vc_nb_write,
.d_ioctl = vc_nb_ioctl,
.d_poll = vc_nb_poll,
.d_name = "Coda",
};
static eventhandler_tag clonetag;
static LIST_HEAD(, coda_mntinfo) coda_mnttbl;
int vcdebug = 1;
#define VCDEBUG if (vcdebug) printf
/* for DEVFS, using bpf & tun drivers as examples*/
static void coda_fbsd_clone(void *arg, char *name, int namelen,
struct cdev **dev);
static int
codadev_modevent(module_t mod, int type, void *data)
{
struct coda_mntinfo *mnt;
switch (type) {
case MOD_LOAD:
LIST_INIT(&coda_mnttbl);
clonetag = EVENTHANDLER_REGISTER(dev_clone, coda_fbsd_clone,
0, 1000);
break;
case MOD_UNLOAD:
EVENTHANDLER_DEREGISTER(dev_clone, clonetag);
while ((mnt = LIST_FIRST(&coda_mnttbl)) != NULL) {
LIST_REMOVE(mnt, mi_list);
destroy_dev(mnt->dev);
free(mnt, M_CODA);
}
break;
default:
return (EOPNOTSUPP);
}
return 0;
}
static moduledata_t codadev_mod = {
"codadev",
codadev_modevent,
NULL
};
DECLARE_MODULE(codadev, codadev_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE);
int
coda_fbsd_getpages(v)
void *v;
{
struct vop_getpages_args *ap = v;
#if 1
return vop_stdgetpages(ap);
#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, -1);
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);
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
}
static void coda_fbsd_clone(arg, name, namelen, dev)
void *arg;
char *name;
int namelen;
struct cdev **dev;
{
int u;
struct coda_mntinfo *mnt;
if (*dev != NULL)
return;
if (dev_stdclone(name,NULL,"cfs",&u) != 1)
return;
*dev = make_dev(&codadevsw,unit2minor(u),UID_ROOT,GID_WHEEL,0600,"cfs%d",u);
mnt = malloc(sizeof(struct coda_mntinfo), M_CODA, M_WAITOK|M_ZERO);
LIST_INSERT_HEAD(&coda_mnttbl, mnt, mi_list);
}
struct coda_mntinfo *
dev2coda_mntinfo(struct cdev *dev)
{
struct coda_mntinfo *mnt;
LIST_FOREACH(mnt, &coda_mnttbl, mi_list) {
if (mnt->dev == dev)
break;
}
return mnt;
}
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