1/*-
2 * Copyright (c) 2002 Poul-Henning Kamp
3 * Copyright (c) 2002 Networks Associates Technology, Inc.
4 * All rights reserved.
5 *
6 * This software was developed for the FreeBSD Project by Poul-Henning Kamp
7 * and NAI Labs, the Security Research Division of Network Associates, Inc.
8 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
9 * DARPA CHATS research program.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. The names of the authors may not be used to endorse or promote
20 * products derived from this software without specific prior written
21 * permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
| 1/*-
2 * Copyright (c) 2002 Poul-Henning Kamp
3 * Copyright (c) 2002 Networks Associates Technology, Inc.
4 * All rights reserved.
5 *
6 * This software was developed for the FreeBSD Project by Poul-Henning Kamp
7 * and NAI Labs, the Security Research Division of Network Associates, Inc.
8 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
9 * DARPA CHATS research program.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. The names of the authors may not be used to endorse or promote
20 * products derived from this software without specific prior written
21 * permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
|
35 * $FreeBSD: head/sys/geom/geom_disk.c 105542 2002-10-20 19:18:07Z phk $
| 35 * $FreeBSD: head/sys/geom/geom_disk.c 105551 2002-10-20 20:28:24Z phk $
|
36 */
37
38#include "opt_geom.h"
39#ifndef NO_GEOM
40
41#include <sys/param.h>
42#include <sys/systm.h>
43#include <sys/kernel.h>
44#include <sys/sysctl.h>
45#include <sys/bio.h>
46#include <sys/conf.h>
47#include <sys/disk.h>
48#include <sys/diskslice.h>
49#include <sys/disklabel.h>
50#include <sys/malloc.h>
51#include <sys/sysctl.h>
52#include <sys/stdint.h>
53#include <machine/md_var.h>
54
55
56#include <sys/lock.h>
57#include <sys/mutex.h>
58#include <geom/geom.h>
59
60static g_access_t g_disk_access;
61
62struct g_class g_disk_class = {
63 "DISK",
64 NULL,
65 NULL,
66 G_CLASS_INITIALIZER
67};
68
69DECLARE_GEOM_CLASS(g_disk_class, g_disk);
70
71static int
72g_disk_access(struct g_provider *pp, int r, int w, int e)
73{
74 struct disk *dp;
75 dev_t dev;
76 int error;
77
78 g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)",
79 pp->name, r, w, e);
80 g_topology_assert();
81 r += pp->acr;
82 w += pp->acw;
83 e += pp->ace;
84 dp = pp->geom->softc;
85 dev = dp->d_dev;
86 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) {
87 mtx_lock(&Giant);
88 error = devsw(dev)->d_open(dev, 3, 0, NULL);
89 if (error != 0)
90 printf("Opened disk %s -> %d\n", pp->name, error);
91 mtx_unlock(&Giant);
| 36 */
37
38#include "opt_geom.h"
39#ifndef NO_GEOM
40
41#include <sys/param.h>
42#include <sys/systm.h>
43#include <sys/kernel.h>
44#include <sys/sysctl.h>
45#include <sys/bio.h>
46#include <sys/conf.h>
47#include <sys/disk.h>
48#include <sys/diskslice.h>
49#include <sys/disklabel.h>
50#include <sys/malloc.h>
51#include <sys/sysctl.h>
52#include <sys/stdint.h>
53#include <machine/md_var.h>
54
55
56#include <sys/lock.h>
57#include <sys/mutex.h>
58#include <geom/geom.h>
59
60static g_access_t g_disk_access;
61
62struct g_class g_disk_class = {
63 "DISK",
64 NULL,
65 NULL,
66 G_CLASS_INITIALIZER
67};
68
69DECLARE_GEOM_CLASS(g_disk_class, g_disk);
70
71static int
72g_disk_access(struct g_provider *pp, int r, int w, int e)
73{
74 struct disk *dp;
75 dev_t dev;
76 int error;
77
78 g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)",
79 pp->name, r, w, e);
80 g_topology_assert();
81 r += pp->acr;
82 w += pp->acw;
83 e += pp->ace;
84 dp = pp->geom->softc;
85 dev = dp->d_dev;
86 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) {
87 mtx_lock(&Giant);
88 error = devsw(dev)->d_open(dev, 3, 0, NULL);
89 if (error != 0)
90 printf("Opened disk %s -> %d\n", pp->name, error);
91 mtx_unlock(&Giant);
|
| 92 pp->mediasize = dp->d_mediasize;
93 pp->sectorsize = dp->d_sectorsize;
|
92 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) {
93 mtx_lock(&Giant);
94 error = devsw(dev)->d_close(dev, 3, 0, NULL);
95 if (error != 0)
96 printf("Closed disk %s -> %d\n", pp->name, error);
97 mtx_unlock(&Giant);
98 } else {
99 error = 0;
100 }
| 94 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) {
95 mtx_lock(&Giant);
96 error = devsw(dev)->d_close(dev, 3, 0, NULL);
97 if (error != 0)
98 printf("Closed disk %s -> %d\n", pp->name, error);
99 mtx_unlock(&Giant);
100 } else {
101 error = 0;
102 }
|
101 pp->mediasize = dp->d_mediasize;
102 pp->sectorsize = dp->d_sectorsize;
| |
103 return (error);
104}
105
106static void
107g_disk_kerneldump(struct bio *bp, struct disk *dp)
108{
109 int error;
110 struct g_kerneldump *gkd;
111 struct dumperinfo di;
112 struct g_geom *gp;
113
114 gkd = (struct g_kerneldump*)bp->bio_data;
115 gp = bp->bio_to->geom;
116 g_trace(G_T_TOPOLOGY, "g_disk_kernedump(%s, %jd, %jd)",
117 gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length);
118 di.dumper = (dumper_t *)dp->d_devsw->d_dump;
119 di.priv = dp->d_dev;
120 di.blocksize = dp->d_sectorsize;
121 di.mediaoffset = gkd->offset;
122 di.mediasize = gkd->length;
123 error = set_dumper(&di);
124 g_io_deliver(bp, error);
125}
126
127static void
128g_disk_done(struct bio *bp)
129{
130
131 mtx_unlock(&Giant);
132 bp->bio_completed = bp->bio_length - bp->bio_resid;
133 g_std_done(bp);
134 mtx_lock(&Giant);
135}
136
137static void
138g_disk_start(struct bio *bp)
139{
140 struct bio *bp2;
141 dev_t dev;
142 struct disk *dp;
143 struct g_ioctl *gio;
144 int error;
145
146 dp = bp->bio_to->geom->softc;
147 dev = dp->d_dev;
148 error = EJUSTRETURN;
149 switch(bp->bio_cmd) {
150 case BIO_DELETE:
151 if (!(devsw(dev)->d_flags & D_CANFREE)) {
152 error = 0;
153 break;
154 }
155 /* fall-through */
156 case BIO_READ:
157 case BIO_WRITE:
158 bp2 = g_clone_bio(bp);
159 bp2->bio_done = g_disk_done;
160 bp2->bio_blkno = bp2->bio_offset >> DEV_BSHIFT;
161 bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize;
162 bp2->bio_bcount = bp2->bio_length;
163 bp2->bio_dev = dev;
164 mtx_lock(&Giant);
165 devsw(dev)->d_strategy(bp2);
166 mtx_unlock(&Giant);
167 break;
168 case BIO_GETATTR:
| 103 return (error);
104}
105
106static void
107g_disk_kerneldump(struct bio *bp, struct disk *dp)
108{
109 int error;
110 struct g_kerneldump *gkd;
111 struct dumperinfo di;
112 struct g_geom *gp;
113
114 gkd = (struct g_kerneldump*)bp->bio_data;
115 gp = bp->bio_to->geom;
116 g_trace(G_T_TOPOLOGY, "g_disk_kernedump(%s, %jd, %jd)",
117 gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length);
118 di.dumper = (dumper_t *)dp->d_devsw->d_dump;
119 di.priv = dp->d_dev;
120 di.blocksize = dp->d_sectorsize;
121 di.mediaoffset = gkd->offset;
122 di.mediasize = gkd->length;
123 error = set_dumper(&di);
124 g_io_deliver(bp, error);
125}
126
127static void
128g_disk_done(struct bio *bp)
129{
130
131 mtx_unlock(&Giant);
132 bp->bio_completed = bp->bio_length - bp->bio_resid;
133 g_std_done(bp);
134 mtx_lock(&Giant);
135}
136
137static void
138g_disk_start(struct bio *bp)
139{
140 struct bio *bp2;
141 dev_t dev;
142 struct disk *dp;
143 struct g_ioctl *gio;
144 int error;
145
146 dp = bp->bio_to->geom->softc;
147 dev = dp->d_dev;
148 error = EJUSTRETURN;
149 switch(bp->bio_cmd) {
150 case BIO_DELETE:
151 if (!(devsw(dev)->d_flags & D_CANFREE)) {
152 error = 0;
153 break;
154 }
155 /* fall-through */
156 case BIO_READ:
157 case BIO_WRITE:
158 bp2 = g_clone_bio(bp);
159 bp2->bio_done = g_disk_done;
160 bp2->bio_blkno = bp2->bio_offset >> DEV_BSHIFT;
161 bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize;
162 bp2->bio_bcount = bp2->bio_length;
163 bp2->bio_dev = dev;
164 mtx_lock(&Giant);
165 devsw(dev)->d_strategy(bp2);
166 mtx_unlock(&Giant);
167 break;
168 case BIO_GETATTR:
|
169 if (g_handleattr_int(bp, "GEOM::sectorsize", dp->d_sectorsize))
| 169 if (g_handleattr_int(bp, "GEOM::fwsectors", dp->d_fwsectors))
|
170 break;
| 170 break;
|
171 else if (g_handleattr_int(bp, "GEOM::fwsectors", dp->d_fwsectors))
172 break;
| |
173 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads))
174 break;
| 171 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads))
172 break;
|
175 else if (g_handleattr_off_t(bp, "GEOM::mediasize", dp->d_mediasize))
176 break;
| |
177 else if (g_handleattr_off_t(bp, "GEOM::frontstuff", 0))
178 break;
179 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump"))
180 g_disk_kerneldump(bp, dp);
181 else if (!strcmp(bp->bio_attribute, "GEOM::ioctl") &&
182 bp->bio_length == sizeof *gio) {
183 gio = (struct g_ioctl *)bp->bio_data;
184 gio->func = devsw(dp->d_dev)->d_ioctl;
185 gio->dev = dp->d_dev;
186 error = EDIRIOCTL;
187 } else
188 error = ENOIOCTL;
189 break;
190 case BIO_SETATTR:
191 if (!strcmp(bp->bio_attribute, "GEOM::ioctl") &&
192 bp->bio_length == sizeof *gio) {
193 gio = (struct g_ioctl *)bp->bio_data;
194 gio->func = devsw(dp->d_dev)->d_ioctl;
195 gio->dev = dp->d_dev;
196 error = EDIRIOCTL;
197 } else
198 error = ENOIOCTL;
199 break;
200 default:
201 error = EOPNOTSUPP;
202 break;
203 }
204 if (error != EJUSTRETURN)
205 g_io_deliver(bp, error);
206 return;
207}
208
209static void
210g_disk_dumpconf(struct sbuf *sb, char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp)
211{
212 struct disk *dp;
213
214 dp = gp->softc;
215 if (pp != NULL) {
216 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n",
217 indent, dp->d_fwheads);
218 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n",
219 indent, dp->d_fwsectors);
220 }
221}
222
223static void
224g_disk_create(void *arg)
225{
226 struct g_geom *gp;
227 struct g_provider *pp;
228 dev_t dev;
229
230 g_topology_assert();
231 dev = arg;
232 gp = g_new_geomf(&g_disk_class, dev->si_name);
233 gp->start = g_disk_start;
234 gp->access = g_disk_access;
235 gp->softc = dev->si_disk;
236 gp->dumpconf = g_disk_dumpconf;
237 dev->si_disk->d_softc = gp;
238 pp = g_new_providerf(gp, "%s", gp->name);
| 173 else if (g_handleattr_off_t(bp, "GEOM::frontstuff", 0))
174 break;
175 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump"))
176 g_disk_kerneldump(bp, dp);
177 else if (!strcmp(bp->bio_attribute, "GEOM::ioctl") &&
178 bp->bio_length == sizeof *gio) {
179 gio = (struct g_ioctl *)bp->bio_data;
180 gio->func = devsw(dp->d_dev)->d_ioctl;
181 gio->dev = dp->d_dev;
182 error = EDIRIOCTL;
183 } else
184 error = ENOIOCTL;
185 break;
186 case BIO_SETATTR:
187 if (!strcmp(bp->bio_attribute, "GEOM::ioctl") &&
188 bp->bio_length == sizeof *gio) {
189 gio = (struct g_ioctl *)bp->bio_data;
190 gio->func = devsw(dp->d_dev)->d_ioctl;
191 gio->dev = dp->d_dev;
192 error = EDIRIOCTL;
193 } else
194 error = ENOIOCTL;
195 break;
196 default:
197 error = EOPNOTSUPP;
198 break;
199 }
200 if (error != EJUSTRETURN)
201 g_io_deliver(bp, error);
202 return;
203}
204
205static void
206g_disk_dumpconf(struct sbuf *sb, char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp)
207{
208 struct disk *dp;
209
210 dp = gp->softc;
211 if (pp != NULL) {
212 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n",
213 indent, dp->d_fwheads);
214 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n",
215 indent, dp->d_fwsectors);
216 }
217}
218
219static void
220g_disk_create(void *arg)
221{
222 struct g_geom *gp;
223 struct g_provider *pp;
224 dev_t dev;
225
226 g_topology_assert();
227 dev = arg;
228 gp = g_new_geomf(&g_disk_class, dev->si_name);
229 gp->start = g_disk_start;
230 gp->access = g_disk_access;
231 gp->softc = dev->si_disk;
232 gp->dumpconf = g_disk_dumpconf;
233 dev->si_disk->d_softc = gp;
234 pp = g_new_providerf(gp, "%s", gp->name);
|
| 235 pp->mediasize = dev->si_disk->d_mediasize;
236 pp->sectorsize = dev->si_disk->d_sectorsize;
|
239 g_error_provider(pp, 0);
240}
241
242
243
244dev_t
245disk_create(int unit, struct disk *dp, int flags, struct cdevsw *cdevsw, struct cdevsw *proto)
246{
247 dev_t dev;
248
249 dev = g_malloc(sizeof *dev, M_WAITOK | M_ZERO);
250 dp->d_dev = dev;
251 dp->d_devsw = cdevsw;
252 dev->si_devsw = cdevsw;
253 dev->si_disk = dp;
254 dev->si_udev = dkmakeminor(unit, WHOLE_DISK_SLICE, RAW_PART);
255 sprintf(dev->si_name, "%s%d", cdevsw->d_name, unit);
256 g_call_me(g_disk_create, dev);
257 return (dev);
258}
259
260void disk_dev_synth(dev_t dev);
261
262void
263disk_dev_synth(dev_t dev)
264{
265
266 return;
267}
268
269void
270disk_destroy(dev_t dev)
271{
272 struct disk *dp;
273 struct g_geom *gp;
274
275 dp = dev->si_disk;
276 gp = dp->d_softc;
277 g_free(dev);
278 gp->flags |= G_GEOM_WITHER;
279 g_orphan_provider(LIST_FIRST(&gp->provider), ENXIO);
280}
281
282void
283disk_invalidate (struct disk *disk)
284{
285}
286
287static void
288g_kern_disks(void *p)
289{
290 struct sbuf *sb;
291 struct g_geom *gp;
292 char *sp;
293
294 sb = p;
295 sp = "";
296 g_topology_assert();
297 LIST_FOREACH(gp, &g_disk_class.geom, geom) {
298 sbuf_printf(sb, "%s%s", sp, gp->name);
299 sp = " ";
300 }
301 sbuf_finish(sb);
302 wakeup(sb);
303}
304
305static int
306sysctl_disks(SYSCTL_HANDLER_ARGS)
307{
308 int error;
309 struct sbuf *sb;
310
311 sb = sbuf_new(NULL, NULL, 0, SBUF_AUTOEXTEND);
312 sbuf_clear(sb);
313 g_call_me(g_kern_disks, sb);
314 do {
315 tsleep(sb, PZERO, "kern.disks", hz);
316 } while(!sbuf_done(sb));
317 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
318 sbuf_delete(sb);
319 return error;
320}
321
322SYSCTL_PROC(_kern, OID_AUTO, disks, CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NOLOCK, 0, 0,
323 sysctl_disks, "A", "names of available disks");
324
325#endif
| 237 g_error_provider(pp, 0);
238}
239
240
241
242dev_t
243disk_create(int unit, struct disk *dp, int flags, struct cdevsw *cdevsw, struct cdevsw *proto)
244{
245 dev_t dev;
246
247 dev = g_malloc(sizeof *dev, M_WAITOK | M_ZERO);
248 dp->d_dev = dev;
249 dp->d_devsw = cdevsw;
250 dev->si_devsw = cdevsw;
251 dev->si_disk = dp;
252 dev->si_udev = dkmakeminor(unit, WHOLE_DISK_SLICE, RAW_PART);
253 sprintf(dev->si_name, "%s%d", cdevsw->d_name, unit);
254 g_call_me(g_disk_create, dev);
255 return (dev);
256}
257
258void disk_dev_synth(dev_t dev);
259
260void
261disk_dev_synth(dev_t dev)
262{
263
264 return;
265}
266
267void
268disk_destroy(dev_t dev)
269{
270 struct disk *dp;
271 struct g_geom *gp;
272
273 dp = dev->si_disk;
274 gp = dp->d_softc;
275 g_free(dev);
276 gp->flags |= G_GEOM_WITHER;
277 g_orphan_provider(LIST_FIRST(&gp->provider), ENXIO);
278}
279
280void
281disk_invalidate (struct disk *disk)
282{
283}
284
285static void
286g_kern_disks(void *p)
287{
288 struct sbuf *sb;
289 struct g_geom *gp;
290 char *sp;
291
292 sb = p;
293 sp = "";
294 g_topology_assert();
295 LIST_FOREACH(gp, &g_disk_class.geom, geom) {
296 sbuf_printf(sb, "%s%s", sp, gp->name);
297 sp = " ";
298 }
299 sbuf_finish(sb);
300 wakeup(sb);
301}
302
303static int
304sysctl_disks(SYSCTL_HANDLER_ARGS)
305{
306 int error;
307 struct sbuf *sb;
308
309 sb = sbuf_new(NULL, NULL, 0, SBUF_AUTOEXTEND);
310 sbuf_clear(sb);
311 g_call_me(g_kern_disks, sb);
312 do {
313 tsleep(sb, PZERO, "kern.disks", hz);
314 } while(!sbuf_done(sb));
315 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
316 sbuf_delete(sb);
317 return error;
318}
319
320SYSCTL_PROC(_kern, OID_AUTO, disks, CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NOLOCK, 0, 0,
321 sysctl_disks, "A", "names of available disks");
322
323#endif
|