276 lines
6.6 KiB
C
276 lines
6.6 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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* $Id: coda_fbsd.c,v 1.6 1998/09/28 20:52:57 rvb Exp $
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*
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*/
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#ifdef VFS_LKM
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#define NVCODA 4
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#else
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#include "vcoda.h"
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#include "opt_devfs.h"
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#endif
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <sys/malloc.h>
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#include <sys/fcntl.h>
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#include <sys/ucred.h>
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#include <sys/vnode.h>
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#include <sys/conf.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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#ifdef DEVFS
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#include <sys/devfsext.h>
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static void *cfs_devfs_token[NVCODA];
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static void *coda_devfs_token[NVCODA];
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#endif
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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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{
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vc_nb_open, vc_nb_close, vc_nb_read, vc_nb_write, /*93*/
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vc_nb_ioctl, nostop, nullreset, nodevtotty,
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vc_nb_poll, nommap, NULL, "Coda", NULL, -1
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};
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void vcattach __P((void));
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static dev_t codadev;
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int vcdebug = 1;
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#define VCDEBUG if (vcdebug) printf
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void
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vcattach(void)
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{
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/*
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* In case we are an LKM, set up device switch.
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*/
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if (0 == (codadev = makedev(VC_DEV_NO, 0)))
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VCDEBUG("makedev returned null\n");
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else
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VCDEBUG("makedev OK.\n");
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cdevsw_add(&codadev, &codadevsw, NULL);
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VCDEBUG("coda: codadevsw entry installed at %d.\n", major(codadev));
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}
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static vc_devsw_installed = 0;
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static void vc_drvinit __P((void *unused));
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static void
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vc_drvinit(void *unused)
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{
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dev_t dev;
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#ifdef DEVFS
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int i;
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#endif
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if( ! vc_devsw_installed ) {
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dev = makedev(VC_DEV_NO, 0);
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cdevsw_add(&dev,&codadevsw, NULL);
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vc_devsw_installed = 1;
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}
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#ifdef DEVFS
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/* tmp */
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#undef NVCODA
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#define NVCODA 1
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for (i = 0; i < NVCODA; i++) {
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cfs_devfs_token[i] =
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devfs_add_devswf(&codadevsw, i,
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DV_CHR, UID_ROOT, GID_WHEEL, 0666,
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"cfs%d", i);
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coda_devfs_token[i] =
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devfs_add_devswf(&codadevsw, i,
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DV_CHR, UID_ROOT, GID_WHEEL, 0666,
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"coda%d", i);
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}
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#endif
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}
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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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/* ??? a_offset */
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ret = vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count,
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ap->a_reqpage);
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return ret;
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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, 1);
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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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int
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coda_fbsd_putpages(v)
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void *v;
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{
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struct vop_putpages_args *ap = v;
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/*??? a_offset */
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return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count,
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ap->a_sync, ap->a_rtvals);
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}
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SYSINIT(codadev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+VC_DEV_NO,vc_drvinit,NULL)
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#ifdef VFS_LKM
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#include <sys/mount.h>
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#include <sys/lkm.h>
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extern struct vfsops coda_vfsops;
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static struct vfsconf _fs_vfsconf = { &coda_vfsops, "coda", -1, 0, 0 };
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extern struct linker_set coda_modvnops ;
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static struct lkm_vfs coda_mod_vfs = {
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LM_VFS, LKM_VERSION, "coda", 0, &coda_modvnops, &_fs_vfsconf };
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static struct lkm_dev coda_mod_dev = {
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LM_DEV, LKM_VERSION, "codadev", VC_DEV_NO, LM_DT_CHAR, (void *) &codadevsw};
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int coda_mod(struct lkm_table *, int, int);
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int
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coda_mod(struct lkm_table *lkmtp, int cmd, int ver)
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{
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int error = 0;
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if (ver != LKM_VERSION)
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return EINVAL;
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switch (cmd) {
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case LKM_E_LOAD:
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lkmtp->private.lkm_any = (struct lkm_any *) &coda_mod_dev;
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error = lkmdispatch(lkmtp, cmd);
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if (error)
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break;
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lkmtp->private.lkm_any = (struct lkm_any *) &coda_mod_vfs ;
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error = lkmdispatch(lkmtp, cmd);
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break;
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case LKM_E_UNLOAD:
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lkmtp->private.lkm_any = (struct lkm_any *) &coda_mod_vfs ;
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error = lkmdispatch(lkmtp, cmd);
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if (error)
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break;
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lkmtp->private.lkm_any = (struct lkm_any *) &coda_mod_dev;
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error = lkmdispatch(lkmtp, cmd);
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break;
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case LKM_E_STAT:
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error = lkmdispatch(lkmtp, cmd);
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break;
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}
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return error;
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}
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#endif
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