FreeBSD/Linux Kernel Cross Reference
sys/coda/coda_fbsd.c
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 * $FreeBSD$
31 *
32 */
33
34 #include "vcoda.h"
35
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/kernel.h>
39 #include <sys/proc.h>
40 #include <sys/malloc.h>
41 #include <sys/fcntl.h>
42 #include <sys/ucred.h>
43 #include <sys/vnode.h>
44 #include <sys/conf.h>
45
46 #include <vm/vm.h>
47 #include <vm/vnode_pager.h>
48
49 #include <coda/coda.h>
50 #include <coda/cnode.h>
51 #include <coda/coda_vnops.h>
52 #include <coda/coda_psdev.h>
53
54 /*
55 From: "Jordan K. Hubbard" <jkh@time.cdrom.com>
56 Subject: Re: New 3.0 SNAPshot CDROM about ready for production..
57 To: "Robert.V.Baron" <rvb@GLUCK.CODA.CS.CMU.EDU>
58 Date: Fri, 20 Feb 1998 15:57:01 -0800
59
60 > Also I need a character device major number. (and might want to reserve
61 > a block of 10 syscalls.)
62
63 Just one char device number? No block devices? Very well, cdev 93 is yours!
64 */
65
66 #define VC_DEV_NO 93
67
68 static struct cdevsw codadevsw = {
69 /* open */ vc_nb_open,
70 /* close */ vc_nb_close,
71 /* read */ vc_nb_read,
72 /* write */ vc_nb_write,
73 /* ioctl */ vc_nb_ioctl,
74 /* poll */ vc_nb_poll,
75 /* mmap */ nommap,
76 /* strategy */ nostrategy,
77 /* name */ "Coda",
78 /* maj */ VC_DEV_NO,
79 /* dump */ nodump,
80 /* psize */ nopsize,
81 /* flags */ 0,
82 /* bmaj */ -1
83 };
84
85 int vcdebug = 1;
86 #define VCDEBUG if (vcdebug) printf
87
88 static int
89 codadev_modevent(module_t mod, int type, void *data)
90 {
91
92 switch (type) {
93 case MOD_LOAD:
94 cdevsw_add(&codadevsw);
95 break;
96 case MOD_UNLOAD:
97 break;
98 default:
99 break;
100 }
101 return 0;
102 }
103 static moduledata_t codadev_mod = {
104 "codadev",
105 codadev_modevent,
106 NULL
107 };
108 DECLARE_MODULE(codadev, codadev_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE+VC_DEV_NO);
109
110 int
111 coda_fbsd_getpages(v)
112 void *v;
113 {
114 struct vop_getpages_args *ap = v;
115 int ret = 0;
116
117 #if 1
118 /* ??? a_offset */
119 ret = vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count,
120 ap->a_reqpage);
121 return ret;
122 #else
123 {
124 struct vnode *vp = ap->a_vp;
125 struct cnode *cp = VTOC(vp);
126 struct vnode *cfvp = cp->c_ovp;
127 int opened_internally = 0;
128 struct ucred *cred = (struct ucred *) 0;
129 struct proc *p = curproc;
130 int error = 0;
131
132 if (IS_CTL_VP(vp)) {
133 return(EINVAL);
134 }
135
136 /* Redirect the request to UFS. */
137
138 if (cfvp == NULL) {
139 opened_internally = 1;
140
141 error = VOP_OPEN(vp, FREAD, cred, p);
142 printf("coda_getp: Internally Opening %p\n", vp);
143
144 if (error) {
145 printf("coda_getpage: VOP_OPEN on container failed %d\n", error);
146 return (error);
147 }
148 if (vp->v_type == VREG) {
149 error = vfs_object_create(vp, p, cred);
150 if (error != 0) {
151 printf("coda_getpage: vfs_object_create() returns %d\n", error);
152 vput(vp);
153 return(error);
154 }
155 }
156
157 cfvp = cp->c_ovp;
158 } else {
159 printf("coda_getp: has container %p\n", cfvp);
160 }
161
162 printf("coda_fbsd_getpages: using container ");
163 /*
164 error = vnode_pager_generic_getpages(cfvp, ap->a_m, ap->a_count,
165 ap->a_reqpage);
166 */
167 error = VOP_GETPAGES(cfvp, ap->a_m, ap->a_count,
168 ap->a_reqpage, ap->a_offset);
169 printf("error = %d\n", error);
170
171 /* Do an internal close if necessary. */
172 if (opened_internally) {
173 (void)VOP_CLOSE(vp, FREAD, cred, p);
174 }
175
176 return(error);
177 }
178 #endif
179 }
180
181 int
182 coda_fbsd_putpages(v)
183 void *v;
184 {
185 struct vop_putpages_args *ap = v;
186
187 /*??? a_offset */
188 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count,
189 ap->a_sync, ap->a_rtvals);
190 }
Cache object: d3f0c31f2abfab38266d59d240045f05
|