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 110119 2003-01-30 20:34:23Z phk $
| 35 * $FreeBSD: head/sys/geom/geom_disk.c 110230 2003-02-02 11:59:54Z phk $
|
36 */
37
38#include "opt_geom.h"
39
40#include <sys/param.h>
41#include <sys/systm.h>
42#include <sys/kernel.h>
43#include <sys/sysctl.h>
44#include <sys/bio.h>
45#include <sys/conf.h>
46#include <sys/disk.h>
47#include <sys/fcntl.h>
48#include <sys/malloc.h>
49#include <sys/sysctl.h>
50#include <sys/stdint.h>
51#include <machine/md_var.h>
52
53
54#include <sys/lock.h>
55#include <sys/mutex.h>
56#include <geom/geom.h>
57
58static g_access_t g_disk_access;
59
60struct g_class g_disk_class = {
61 "DISK",
62 NULL,
63 NULL,
64 G_CLASS_INITIALIZER
65};
66
67DECLARE_GEOM_CLASS(g_disk_class, g_disk);
68
69static void __inline
70g_disk_lock_giant(struct disk *dp)
71{
72 if (dp->d_flags & DISKFLAG_NOGIANT)
73 return;
74 mtx_lock(&Giant);
75}
76
77static void __inline
78g_disk_unlock_giant(struct disk *dp)
79{
80 if (dp->d_flags & DISKFLAG_NOGIANT)
81 return;
82 mtx_unlock(&Giant);
83}
84
85static int
86g_disk_access(struct g_provider *pp, int r, int w, int e)
87{
88 struct disk *dp;
89 dev_t dev;
90 int error;
91
92 g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)",
93 pp->name, r, w, e);
94 g_topology_assert();
95 r += pp->acr;
96 w += pp->acw;
97 e += pp->ace;
98 dp = pp->geom->softc;
99 dev = dp->d_dev;
100 error = 0;
101 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) {
102 if (dp->d_open != NULL) {
103 g_disk_lock_giant(dp);
104 error = dp->d_open(dev, FREAD | FWRITE, 0, NULL);
105 if (error != 0)
106 printf("Opened disk %s -> %d\n",
107 pp->name, error);
108 g_disk_unlock_giant(dp);
109 }
110 pp->mediasize = dp->d_mediasize;
111 pp->sectorsize = dp->d_sectorsize;
112 dp->d_flags |= DISKFLAG_OPEN;
113 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) {
114 if (dp->d_close != NULL) {
115 g_disk_lock_giant(dp);
116 error = dp->d_close(dev, FREAD | FWRITE, 0, NULL);
117 if (error != 0)
118 printf("Closed disk %s -> %d\n",
119 pp->name, error);
120 g_disk_unlock_giant(dp);
121 }
122 dp->d_flags &= ~DISKFLAG_OPEN;
123 }
124 return (error);
125}
126
127static void
128g_disk_kerneldump(struct bio *bp, struct disk *dp)
129{
130 int error;
131 struct g_kerneldump *gkd;
132 struct dumperinfo di;
133 struct g_geom *gp;
134
135 gkd = (struct g_kerneldump*)bp->bio_data;
136 gp = bp->bio_to->geom;
137 g_trace(G_T_TOPOLOGY, "g_disk_kernedump(%s, %jd, %jd)",
138 gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length);
139 di.dumper = dp->d_dump;
140 di.priv = dp->d_dev;
141 di.blocksize = dp->d_sectorsize;
142 di.mediaoffset = gkd->offset;
143 di.mediasize = gkd->length;
144 error = set_dumper(&di);
145 g_io_deliver(bp, error);
146}
147
148static void
149g_disk_done(struct bio *bp)
150{
151 struct disk *dp;
152
| 36 */
37
38#include "opt_geom.h"
39
40#include <sys/param.h>
41#include <sys/systm.h>
42#include <sys/kernel.h>
43#include <sys/sysctl.h>
44#include <sys/bio.h>
45#include <sys/conf.h>
46#include <sys/disk.h>
47#include <sys/fcntl.h>
48#include <sys/malloc.h>
49#include <sys/sysctl.h>
50#include <sys/stdint.h>
51#include <machine/md_var.h>
52
53
54#include <sys/lock.h>
55#include <sys/mutex.h>
56#include <geom/geom.h>
57
58static g_access_t g_disk_access;
59
60struct g_class g_disk_class = {
61 "DISK",
62 NULL,
63 NULL,
64 G_CLASS_INITIALIZER
65};
66
67DECLARE_GEOM_CLASS(g_disk_class, g_disk);
68
69static void __inline
70g_disk_lock_giant(struct disk *dp)
71{
72 if (dp->d_flags & DISKFLAG_NOGIANT)
73 return;
74 mtx_lock(&Giant);
75}
76
77static void __inline
78g_disk_unlock_giant(struct disk *dp)
79{
80 if (dp->d_flags & DISKFLAG_NOGIANT)
81 return;
82 mtx_unlock(&Giant);
83}
84
85static int
86g_disk_access(struct g_provider *pp, int r, int w, int e)
87{
88 struct disk *dp;
89 dev_t dev;
90 int error;
91
92 g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)",
93 pp->name, r, w, e);
94 g_topology_assert();
95 r += pp->acr;
96 w += pp->acw;
97 e += pp->ace;
98 dp = pp->geom->softc;
99 dev = dp->d_dev;
100 error = 0;
101 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) {
102 if (dp->d_open != NULL) {
103 g_disk_lock_giant(dp);
104 error = dp->d_open(dev, FREAD | FWRITE, 0, NULL);
105 if (error != 0)
106 printf("Opened disk %s -> %d\n",
107 pp->name, error);
108 g_disk_unlock_giant(dp);
109 }
110 pp->mediasize = dp->d_mediasize;
111 pp->sectorsize = dp->d_sectorsize;
112 dp->d_flags |= DISKFLAG_OPEN;
113 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) {
114 if (dp->d_close != NULL) {
115 g_disk_lock_giant(dp);
116 error = dp->d_close(dev, FREAD | FWRITE, 0, NULL);
117 if (error != 0)
118 printf("Closed disk %s -> %d\n",
119 pp->name, error);
120 g_disk_unlock_giant(dp);
121 }
122 dp->d_flags &= ~DISKFLAG_OPEN;
123 }
124 return (error);
125}
126
127static void
128g_disk_kerneldump(struct bio *bp, struct disk *dp)
129{
130 int error;
131 struct g_kerneldump *gkd;
132 struct dumperinfo di;
133 struct g_geom *gp;
134
135 gkd = (struct g_kerneldump*)bp->bio_data;
136 gp = bp->bio_to->geom;
137 g_trace(G_T_TOPOLOGY, "g_disk_kernedump(%s, %jd, %jd)",
138 gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length);
139 di.dumper = dp->d_dump;
140 di.priv = dp->d_dev;
141 di.blocksize = dp->d_sectorsize;
142 di.mediaoffset = gkd->offset;
143 di.mediasize = gkd->length;
144 error = set_dumper(&di);
145 g_io_deliver(bp, error);
146}
147
148static void
149g_disk_done(struct bio *bp)
150{
151 struct disk *dp;
152
|
153 dp = bp->bio_caller1;
| 153 dp = bp->bio_disk;
|
154 bp->bio_completed = bp->bio_length - bp->bio_resid;
155 if (!(dp->d_flags & DISKFLAG_NOGIANT)) {
156 DROP_GIANT();
157 g_std_done(bp);
158 PICKUP_GIANT();
159 } else {
160 g_std_done(bp);
161 }
162}
163
164static void
165g_disk_start(struct bio *bp)
166{
167 struct bio *bp2;
168 dev_t dev;
169 struct disk *dp;
170 struct g_ioctl *gio;
171 int error;
172
173 dp = bp->bio_to->geom->softc;
174 dev = dp->d_dev;
175 error = EJUSTRETURN;
176 switch(bp->bio_cmd) {
177 case BIO_DELETE:
178 if (!(dp->d_flags & DISKFLAG_CANDELETE)) {
179 error = 0;
180 break;
181 }
182 /* fall-through */
183 case BIO_READ:
184 case BIO_WRITE:
185 bp2 = g_clone_bio(bp);
186 bp2->bio_done = g_disk_done;
187 bp2->bio_blkno = bp2->bio_offset >> DEV_BSHIFT;
188 bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize;
189 bp2->bio_bcount = bp2->bio_length;
190 bp2->bio_dev = dev;
| 154 bp->bio_completed = bp->bio_length - bp->bio_resid;
155 if (!(dp->d_flags & DISKFLAG_NOGIANT)) {
156 DROP_GIANT();
157 g_std_done(bp);
158 PICKUP_GIANT();
159 } else {
160 g_std_done(bp);
161 }
162}
163
164static void
165g_disk_start(struct bio *bp)
166{
167 struct bio *bp2;
168 dev_t dev;
169 struct disk *dp;
170 struct g_ioctl *gio;
171 int error;
172
173 dp = bp->bio_to->geom->softc;
174 dev = dp->d_dev;
175 error = EJUSTRETURN;
176 switch(bp->bio_cmd) {
177 case BIO_DELETE:
178 if (!(dp->d_flags & DISKFLAG_CANDELETE)) {
179 error = 0;
180 break;
181 }
182 /* fall-through */
183 case BIO_READ:
184 case BIO_WRITE:
185 bp2 = g_clone_bio(bp);
186 bp2->bio_done = g_disk_done;
187 bp2->bio_blkno = bp2->bio_offset >> DEV_BSHIFT;
188 bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize;
189 bp2->bio_bcount = bp2->bio_length;
190 bp2->bio_dev = dev;
|
191 bp2->bio_caller1 = dp;
| 191 bp2->bio_disk = dp;
|
192 g_disk_lock_giant(dp);
193 dp->d_strategy(bp2);
194 g_disk_unlock_giant(dp);
195 break;
196 case BIO_GETATTR:
197 if (g_handleattr_int(bp, "GEOM::fwsectors", dp->d_fwsectors))
198 break;
199 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads))
200 break;
201 else if (g_handleattr_off_t(bp, "GEOM::frontstuff", 0))
202 break;
203 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump"))
204 g_disk_kerneldump(bp, dp);
205 else if (dp->d_ioctl != NULL &&
206 !strcmp(bp->bio_attribute, "GEOM::ioctl") &&
207 bp->bio_length == sizeof *gio) {
208 gio = (struct g_ioctl *)bp->bio_data;
209 gio->func = dp->d_ioctl;
210 gio->dev = dp->d_dev;
211 error = EDIRIOCTL;
212 } else
213 error = ENOIOCTL;
214 break;
215 case BIO_SETATTR:
216 if (!strcmp(bp->bio_attribute, "GEOM::ioctl") &&
217 bp->bio_length == sizeof *gio) {
218 gio = (struct g_ioctl *)bp->bio_data;
219 gio->func = devsw(dp->d_dev)->d_ioctl;
220 gio->dev = dp->d_dev;
221 error = EDIRIOCTL;
222 } else
223 error = ENOIOCTL;
224 break;
225 default:
226 error = EOPNOTSUPP;
227 break;
228 }
229 if (error != EJUSTRETURN)
230 g_io_deliver(bp, error);
231 return;
232}
233
234static void
235g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp)
236{
237 struct disk *dp;
238
239 dp = gp->softc;
240 if (indent == NULL) {
241 sbuf_printf(sb, " hd %u", dp->d_fwheads);
242 sbuf_printf(sb, " sc %u", dp->d_fwsectors);
243 return;
244 }
245 if (pp != NULL) {
246 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n",
247 indent, dp->d_fwheads);
248 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n",
249 indent, dp->d_fwsectors);
250 }
251}
252
253static void
254g_disk_create(void *arg)
255{
256 struct g_geom *gp;
257 struct g_provider *pp;
258 dev_t dev;
259
260 g_topology_assert();
261 dev = arg;
262 gp = g_new_geomf(&g_disk_class, dev->si_name);
263 gp->start = g_disk_start;
264 gp->access = g_disk_access;
265 gp->softc = dev->si_disk;
266 gp->dumpconf = g_disk_dumpconf;
267 dev->si_disk->d_softc = gp;
268 pp = g_new_providerf(gp, "%s", gp->name);
269 pp->mediasize = dev->si_disk->d_mediasize;
270 pp->sectorsize = dev->si_disk->d_sectorsize;
271 g_error_provider(pp, 0);
272 if (bootverbose)
273 printf("GEOM: new disk %s\n", gp->name);
274}
275
276
277
278dev_t
279disk_create(int unit, struct disk *dp, int flags, struct cdevsw *cdevsw, void * unused __unused)
280{
281 dev_t dev;
282
283 dev = g_malloc(sizeof *dev, M_ZERO);
284 dp->d_dev = dev;
285 dp->d_flags = flags;
286 dp->d_devsw = cdevsw;
287 dev->si_devsw = cdevsw;
288 if (cdevsw != NULL) {
289 dp->d_open = cdevsw->d_open;
290 dp->d_close = cdevsw->d_close;
291 dp->d_strategy = cdevsw->d_strategy;
292 dp->d_ioctl = cdevsw->d_ioctl;
293 dp->d_dump = (dumper_t *)cdevsw->d_dump;
294 dp->d_name = cdevsw->d_name;
295 }
296 KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy"));
297 KASSERT(dp->d_name != NULL, ("disk_create need d_name"));
298 KASSERT(*dp->d_name != 0, ("disk_create need d_name"));
299 dev->si_disk = dp;
300 dev->si_udev = 0x10002; /* XXX: Needed ? */
301 sprintf(dev->si_name, "%s%d", dp->d_name, unit);
302 g_call_me(g_disk_create, dev);
303 return (dev);
304}
305
306void
307disk_destroy(dev_t dev)
308{
309 struct disk *dp;
310 struct g_geom *gp;
311
312 dp = dev->si_disk;
313 gp = dp->d_softc;
314 g_free(dev);
315 gp->flags |= G_GEOM_WITHER;
316 gp->softc = NULL;
317 g_orphan_provider(LIST_FIRST(&gp->provider), ENXIO);
318}
319
320static void
321g_kern_disks(void *p)
322{
323 struct sbuf *sb;
324 struct g_geom *gp;
325 char *sp;
326
327 sb = p;
328 sp = "";
329 g_topology_assert();
330 LIST_FOREACH(gp, &g_disk_class.geom, geom) {
331 sbuf_printf(sb, "%s%s", sp, gp->name);
332 sp = " ";
333 }
334 sbuf_finish(sb);
335 wakeup(sb);
336}
337
338static int
339sysctl_disks(SYSCTL_HANDLER_ARGS)
340{
341 int error;
342 struct sbuf *sb;
343
344 sb = sbuf_new(NULL, NULL, 0, SBUF_AUTOEXTEND);
345 sbuf_clear(sb);
346 g_call_me(g_kern_disks, sb);
347 do {
348 tsleep(sb, PZERO, "kern.disks", hz);
349 } while(!sbuf_done(sb));
350 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
351 sbuf_delete(sb);
352 return error;
353}
354
355SYSCTL_PROC(_kern, OID_AUTO, disks, CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NOLOCK, 0, 0,
356 sysctl_disks, "A", "names of available disks");
357
| 192 g_disk_lock_giant(dp);
193 dp->d_strategy(bp2);
194 g_disk_unlock_giant(dp);
195 break;
196 case BIO_GETATTR:
197 if (g_handleattr_int(bp, "GEOM::fwsectors", dp->d_fwsectors))
198 break;
199 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads))
200 break;
201 else if (g_handleattr_off_t(bp, "GEOM::frontstuff", 0))
202 break;
203 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump"))
204 g_disk_kerneldump(bp, dp);
205 else if (dp->d_ioctl != NULL &&
206 !strcmp(bp->bio_attribute, "GEOM::ioctl") &&
207 bp->bio_length == sizeof *gio) {
208 gio = (struct g_ioctl *)bp->bio_data;
209 gio->func = dp->d_ioctl;
210 gio->dev = dp->d_dev;
211 error = EDIRIOCTL;
212 } else
213 error = ENOIOCTL;
214 break;
215 case BIO_SETATTR:
216 if (!strcmp(bp->bio_attribute, "GEOM::ioctl") &&
217 bp->bio_length == sizeof *gio) {
218 gio = (struct g_ioctl *)bp->bio_data;
219 gio->func = devsw(dp->d_dev)->d_ioctl;
220 gio->dev = dp->d_dev;
221 error = EDIRIOCTL;
222 } else
223 error = ENOIOCTL;
224 break;
225 default:
226 error = EOPNOTSUPP;
227 break;
228 }
229 if (error != EJUSTRETURN)
230 g_io_deliver(bp, error);
231 return;
232}
233
234static void
235g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp)
236{
237 struct disk *dp;
238
239 dp = gp->softc;
240 if (indent == NULL) {
241 sbuf_printf(sb, " hd %u", dp->d_fwheads);
242 sbuf_printf(sb, " sc %u", dp->d_fwsectors);
243 return;
244 }
245 if (pp != NULL) {
246 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n",
247 indent, dp->d_fwheads);
248 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n",
249 indent, dp->d_fwsectors);
250 }
251}
252
253static void
254g_disk_create(void *arg)
255{
256 struct g_geom *gp;
257 struct g_provider *pp;
258 dev_t dev;
259
260 g_topology_assert();
261 dev = arg;
262 gp = g_new_geomf(&g_disk_class, dev->si_name);
263 gp->start = g_disk_start;
264 gp->access = g_disk_access;
265 gp->softc = dev->si_disk;
266 gp->dumpconf = g_disk_dumpconf;
267 dev->si_disk->d_softc = gp;
268 pp = g_new_providerf(gp, "%s", gp->name);
269 pp->mediasize = dev->si_disk->d_mediasize;
270 pp->sectorsize = dev->si_disk->d_sectorsize;
271 g_error_provider(pp, 0);
272 if (bootverbose)
273 printf("GEOM: new disk %s\n", gp->name);
274}
275
276
277
278dev_t
279disk_create(int unit, struct disk *dp, int flags, struct cdevsw *cdevsw, void * unused __unused)
280{
281 dev_t dev;
282
283 dev = g_malloc(sizeof *dev, M_ZERO);
284 dp->d_dev = dev;
285 dp->d_flags = flags;
286 dp->d_devsw = cdevsw;
287 dev->si_devsw = cdevsw;
288 if (cdevsw != NULL) {
289 dp->d_open = cdevsw->d_open;
290 dp->d_close = cdevsw->d_close;
291 dp->d_strategy = cdevsw->d_strategy;
292 dp->d_ioctl = cdevsw->d_ioctl;
293 dp->d_dump = (dumper_t *)cdevsw->d_dump;
294 dp->d_name = cdevsw->d_name;
295 }
296 KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy"));
297 KASSERT(dp->d_name != NULL, ("disk_create need d_name"));
298 KASSERT(*dp->d_name != 0, ("disk_create need d_name"));
299 dev->si_disk = dp;
300 dev->si_udev = 0x10002; /* XXX: Needed ? */
301 sprintf(dev->si_name, "%s%d", dp->d_name, unit);
302 g_call_me(g_disk_create, dev);
303 return (dev);
304}
305
306void
307disk_destroy(dev_t dev)
308{
309 struct disk *dp;
310 struct g_geom *gp;
311
312 dp = dev->si_disk;
313 gp = dp->d_softc;
314 g_free(dev);
315 gp->flags |= G_GEOM_WITHER;
316 gp->softc = NULL;
317 g_orphan_provider(LIST_FIRST(&gp->provider), ENXIO);
318}
319
320static void
321g_kern_disks(void *p)
322{
323 struct sbuf *sb;
324 struct g_geom *gp;
325 char *sp;
326
327 sb = p;
328 sp = "";
329 g_topology_assert();
330 LIST_FOREACH(gp, &g_disk_class.geom, geom) {
331 sbuf_printf(sb, "%s%s", sp, gp->name);
332 sp = " ";
333 }
334 sbuf_finish(sb);
335 wakeup(sb);
336}
337
338static int
339sysctl_disks(SYSCTL_HANDLER_ARGS)
340{
341 int error;
342 struct sbuf *sb;
343
344 sb = sbuf_new(NULL, NULL, 0, SBUF_AUTOEXTEND);
345 sbuf_clear(sb);
346 g_call_me(g_kern_disks, sb);
347 do {
348 tsleep(sb, PZERO, "kern.disks", hz);
349 } while(!sbuf_done(sb));
350 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
351 sbuf_delete(sb);
352 return error;
353}
354
355SYSCTL_PROC(_kern, OID_AUTO, disks, CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NOLOCK, 0, 0,
356 sysctl_disks, "A", "names of available disks");
357
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