1/* 2 * 3 * Coda: an Experimental Distributed File System 4 * Release 3.1 5 * 6 * Copyright (c) 1987-1998 Carnegie Mellon University 7 * All Rights Reserved 8 * 9 * Permission to use, copy, modify and distribute this software and its 10 * documentation is hereby granted, provided that both the copyright 11 * notice and this permission notice appear in all copies of the 12 * software, derivative works or modified versions, and any portions 13 * thereof, and that both notices appear in supporting documentation, and 14 * that credit is given to Carnegie Mellon University in all documents 15 * and publicity pertaining to direct or indirect use of this code or its 16 * derivatives. 17 * 18 * CODA IS AN EXPERIMENTAL SOFTWARE SYSTEM AND IS KNOWN TO HAVE BUGS, 19 * SOME OF WHICH MAY HAVE SERIOUS CONSEQUENCES. CARNEGIE MELLON ALLOWS 20 * FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION. CARNEGIE MELLON 21 * DISCLAIMS ANY LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER 22 * RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OF THIS SOFTWARE OR OF 23 * ANY DERIVATIVE WORK. 24 * 25 * Carnegie Mellon encourages users of this software to return any 26 * improvements or extensions that they make, and to grant Carnegie 27 * Mellon the rights to redistribute these changes without encumbrance. 28 * 29 * @(#) src/sys/coda/coda_fbsd.cr,v 1.1.1.1 1998/08/29 21:14:52 rvb Exp $
|
30 * $Id: coda_fbsd.c,v 1.12 1999/01/27 20:09:17 dillon Exp $
|
30 * $Id: coda_fbsd.c,v 1.13 1999/01/28 00:57:46 dillon Exp $ |
31 * 32 */ 33 34#include "vcoda.h" 35#include "opt_devfs.h" 36 37#include <sys/param.h> 38#include <sys/systm.h> 39#include <sys/kernel.h> 40#include <sys/proc.h> 41#include <sys/malloc.h> 42#include <sys/fcntl.h> 43#include <sys/ucred.h> 44#include <sys/vnode.h> 45#include <sys/conf.h> 46 47#include <vm/vm.h> 48#include <vm/vnode_pager.h> 49 50#include <coda/coda.h> 51#include <coda/cnode.h> 52#include <coda/coda_vnops.h> 53#include <coda/coda_psdev.h> 54 55#ifdef DEVFS 56#include <sys/devfsext.h> 57 58static void *cfs_devfs_token[NVCODA]; 59static void *coda_devfs_token[NVCODA]; 60#endif 61 62/* 63 From: "Jordan K. Hubbard" <jkh@time.cdrom.com> 64 Subject: Re: New 3.0 SNAPshot CDROM about ready for production.. 65 To: "Robert.V.Baron" <rvb@GLUCK.CODA.CS.CMU.EDU> 66 Date: Fri, 20 Feb 1998 15:57:01 -0800 67 68 > Also I need a character device major number. (and might want to reserve 69 > a block of 10 syscalls.) 70 71 Just one char device number? No block devices? Very well, cdev 93 is yours! 72*/ 73 74#define VC_DEV_NO 93 75
|
76static struct cdevsw codadevsw =
77{
78 vc_nb_open, vc_nb_close, vc_nb_read, vc_nb_write, /*93*/
79 vc_nb_ioctl, nostop, nullreset, nodevtotty,
80 vc_nb_poll, nommap, NULL, "Coda", NULL, -1
|
76static struct cdevsw codadevsw = { 77 /* open */ vc_nb_open, 78 /* close */ vc_nb_close, 79 /* read */ vc_nb_read, 80 /* write */ vc_nb_write, 81 /* ioctl */ vc_nb_ioctl, 82 /* stop */ nostop, 83 /* reset */ noreset, 84 /* devtotty */ nodevtotty, 85 /* poll */ vc_nb_poll, 86 /* mmap */ nommap, 87 /* strategy */ nostrategy, 88 /* name */ "Coda", 89 /* parms */ noparms, 90 /* maj */ VC_DEV_NO, 91 /* dump */ nodump, 92 /* psize */ nopsize, 93 /* flags */ 0, 94 /* maxio */ 0, 95 /* bmaj */ -1 |
96}; 97 98int vcdebug = 1; 99#define VCDEBUG if (vcdebug) printf 100 101static int 102codadev_modevent(module_t mod, int type, void *data) 103{ 104 dev_t dev; 105#ifdef DEVFS 106 int i; 107#endif 108 static struct cdevsw *oldcdevsw; 109 110 switch (type) { 111 case MOD_LOAD: 112 dev = makedev(VC_DEV_NO, 0); 113 cdevsw_add(&dev,&codadevsw, &oldcdevsw); 114#ifdef DEVFS 115 /* tmp */ 116#undef NVCODA 117#define NVCODA 1 118 for (i = 0; i < NVCODA; i++) { 119 cfs_devfs_token[i] = 120 devfs_add_devswf(&codadevsw, i, 121 DV_CHR, UID_ROOT, GID_WHEEL, 0666, 122 "cfs%d", i); 123 coda_devfs_token[i] = 124 devfs_add_devswf(&codadevsw, i, 125 DV_CHR, UID_ROOT, GID_WHEEL, 0666, 126 "coda%d", i); 127 } 128#endif 129 break; 130 case MOD_UNLOAD: 131#ifdef DEVFS 132 for (i = 0; i < NVCODA; i++) { 133 devfs_remove_dev(cfs_devfs_token[i]); 134 devfs_remove_dev(coda_devfs_token[i]); 135 } 136#endif 137 cdevsw_add(&dev, oldcdevsw, NULL); 138 break; 139 default: 140 break; 141 } 142 return 0; 143} 144static moduledata_t codadev_mod = { 145 "codadev", 146 codadev_modevent, 147 NULL 148}; 149DECLARE_MODULE(codadev, codadev_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE+VC_DEV_NO); 150 151int 152coda_fbsd_getpages(v) 153 void *v; 154{ 155 struct vop_getpages_args *ap = v; 156 int ret = 0; 157 158#if 1 159 /* ??? a_offset */ 160 ret = vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count, 161 ap->a_reqpage); 162 return ret; 163#else 164 { 165 struct vnode *vp = ap->a_vp; 166 struct cnode *cp = VTOC(vp); 167 struct vnode *cfvp = cp->c_ovp; 168 int opened_internally = 0; 169 struct ucred *cred = (struct ucred *) 0; 170 struct proc *p = curproc; 171 int error = 0; 172 173 if (IS_CTL_VP(vp)) { 174 return(EINVAL); 175 } 176 177 /* Redirect the request to UFS. */ 178 179 if (cfvp == NULL) { 180 opened_internally = 1; 181 182 error = VOP_OPEN(vp, FREAD, cred, p); 183printf("coda_getp: Internally Opening %p\n", vp); 184 185 if (error) { 186 printf("coda_getpage: VOP_OPEN on container failed %d\n", error); 187 return (error); 188 } 189 if (vp->v_type == VREG) { 190 error = vfs_object_create(vp, p, cred); 191 if (error != 0) { 192 printf("coda_getpage: vfs_object_create() returns %d\n", error); 193 vput(vp); 194 return(error); 195 } 196 } 197 198 cfvp = cp->c_ovp; 199 } else { 200printf("coda_getp: has container %p\n", cfvp); 201 } 202 203printf("coda_fbsd_getpages: using container "); 204/* 205 error = vnode_pager_generic_getpages(cfvp, ap->a_m, ap->a_count, 206 ap->a_reqpage); 207*/ 208 error = VOP_GETPAGES(cfvp, ap->a_m, ap->a_count, 209 ap->a_reqpage, ap->a_offset); 210printf("error = %d\n", error); 211 212 /* Do an internal close if necessary. */ 213 if (opened_internally) { 214 (void)VOP_CLOSE(vp, FREAD, cred, p); 215 } 216 217 return(error); 218 } 219#endif 220} 221 222int 223coda_fbsd_putpages(v) 224 void *v; 225{ 226 struct vop_putpages_args *ap = v; 227 228 /*??? a_offset */ 229 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count, 230 ap->a_sync, ap->a_rtvals); 231}
|