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 110720 2003-02-11 18:32:31Z phk $
| 35 * $FreeBSD: head/sys/geom/geom_disk.c 110727 2003-02-11 21:23:34Z 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#include <sys/lock.h>
54#include <sys/mutex.h>
55#include <geom/geom.h>
56
57static struct mtx g_disk_done_mtx;
58
59static g_access_t g_disk_access;
60
61struct g_class g_disk_class = {
62 "DISK",
63 NULL,
64 NULL,
65 G_CLASS_INITIALIZER
66};
67
68static void
69g_disk_init(void)
70{
71 mtx_unlock(&Giant);
72 g_add_class(&g_disk_class);
73 mtx_init(&g_disk_done_mtx, "g_disk_done", MTX_DEF, 0);
74 mtx_lock(&Giant);
75}
76
77DECLARE_GEOM_CLASS_INIT(g_disk_class, g_disk, g_disk_init);
78
79static void __inline
80g_disk_lock_giant(struct disk *dp)
81{
82 if (dp->d_flags & DISKFLAG_NOGIANT)
83 return;
84 mtx_lock(&Giant);
85}
86
87static void __inline
88g_disk_unlock_giant(struct disk *dp)
89{
90 if (dp->d_flags & DISKFLAG_NOGIANT)
91 return;
92 mtx_unlock(&Giant);
93}
94
95static int
96g_disk_access(struct g_provider *pp, int r, int w, int e)
97{
98 struct disk *dp;
99 dev_t dev;
100 int error;
101
102 g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)",
103 pp->name, r, w, e);
104 g_topology_assert();
105 r += pp->acr;
106 w += pp->acw;
107 e += pp->ace;
108 dp = pp->geom->softc;
109 dev = dp->d_dev;
110 error = 0;
111 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) {
112 if (dp->d_open != NULL || dp->d_copen != NULL) {
113 g_disk_lock_giant(dp);
114 if (dp->d_open != NULL)
115 error = dp->d_open(dp);
116 else
117 error = dp->d_copen(dev, FREAD|FWRITE, 0, NULL);
118 if (error != 0)
119 printf("Opened disk %s -> %d\n",
120 pp->name, error);
121 g_disk_unlock_giant(dp);
122 }
123 pp->mediasize = dp->d_mediasize;
124 pp->sectorsize = dp->d_sectorsize;
125 dp->d_flags |= DISKFLAG_OPEN;
| 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#include <sys/lock.h>
54#include <sys/mutex.h>
55#include <geom/geom.h>
56
57static struct mtx g_disk_done_mtx;
58
59static g_access_t g_disk_access;
60
61struct g_class g_disk_class = {
62 "DISK",
63 NULL,
64 NULL,
65 G_CLASS_INITIALIZER
66};
67
68static void
69g_disk_init(void)
70{
71 mtx_unlock(&Giant);
72 g_add_class(&g_disk_class);
73 mtx_init(&g_disk_done_mtx, "g_disk_done", MTX_DEF, 0);
74 mtx_lock(&Giant);
75}
76
77DECLARE_GEOM_CLASS_INIT(g_disk_class, g_disk, g_disk_init);
78
79static void __inline
80g_disk_lock_giant(struct disk *dp)
81{
82 if (dp->d_flags & DISKFLAG_NOGIANT)
83 return;
84 mtx_lock(&Giant);
85}
86
87static void __inline
88g_disk_unlock_giant(struct disk *dp)
89{
90 if (dp->d_flags & DISKFLAG_NOGIANT)
91 return;
92 mtx_unlock(&Giant);
93}
94
95static int
96g_disk_access(struct g_provider *pp, int r, int w, int e)
97{
98 struct disk *dp;
99 dev_t dev;
100 int error;
101
102 g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)",
103 pp->name, r, w, e);
104 g_topology_assert();
105 r += pp->acr;
106 w += pp->acw;
107 e += pp->ace;
108 dp = pp->geom->softc;
109 dev = dp->d_dev;
110 error = 0;
111 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) {
112 if (dp->d_open != NULL || dp->d_copen != NULL) {
113 g_disk_lock_giant(dp);
114 if (dp->d_open != NULL)
115 error = dp->d_open(dp);
116 else
117 error = dp->d_copen(dev, FREAD|FWRITE, 0, NULL);
118 if (error != 0)
119 printf("Opened disk %s -> %d\n",
120 pp->name, error);
121 g_disk_unlock_giant(dp);
122 }
123 pp->mediasize = dp->d_mediasize;
124 pp->sectorsize = dp->d_sectorsize;
125 dp->d_flags |= DISKFLAG_OPEN;
|
| 126 if (dp->d_maxsize == 0 && dp->d_dev->si_iosize_max != 0)
127 dp->d_maxsize = dp->d_dev->si_iosize_max;
128 if (dp->d_maxsize == 0) {
129 printf("WARNING: Disk drive %s%d has no d_maxsize\n",
130 dp->d_name, dp->d_unit);
131 dp->d_maxsize = DFLTPHYS;
132 }
|
126 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) {
127 if (dp->d_close != NULL || dp->d_cclose != NULL) {
128 g_disk_lock_giant(dp);
129 if (dp->d_close != NULL)
130 error = dp->d_close(dp);
131 else
132 error = dp->d_cclose(dev, FREAD|FWRITE, 0, NULL);
133 if (error != 0)
134 printf("Closed disk %s -> %d\n",
135 pp->name, error);
136 g_disk_unlock_giant(dp);
137 }
138 dp->d_flags &= ~DISKFLAG_OPEN;
139 }
140 return (error);
141}
142
143static void
144g_disk_kerneldump(struct bio *bp, struct disk *dp)
145{
146 int error;
147 struct g_kerneldump *gkd;
148 struct dumperinfo di;
149 struct g_geom *gp;
150
151 gkd = (struct g_kerneldump*)bp->bio_data;
152 gp = bp->bio_to->geom;
153 g_trace(G_T_TOPOLOGY, "g_disk_kernedump(%s, %jd, %jd)",
154 gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length);
155 di.dumper = dp->d_dump;
156 di.priv = dp->d_dev;
157 di.blocksize = dp->d_sectorsize;
158 di.mediaoffset = gkd->offset;
159 di.mediasize = gkd->length;
160 error = set_dumper(&di);
161 g_io_deliver(bp, error);
162}
163
164static void
165g_disk_done(struct bio *bp)
166{
167
168 /* See "notes" for why we need a mutex here */
169 /* XXX: will witness accept a mix of Giant/unGiant drivers here ? */
170 mtx_lock(&g_disk_done_mtx);
171 bp->bio_completed = bp->bio_length - bp->bio_resid;
172 g_std_done(bp);
173 mtx_unlock(&g_disk_done_mtx);
174}
175
176static void
177g_disk_start(struct bio *bp)
178{
179 struct bio *bp2, *bp3;
180 dev_t dev;
181 struct disk *dp;
182 struct g_ioctl *gio;
183 int error;
184 off_t off;
185
186 dp = bp->bio_to->geom->softc;
187 dev = dp->d_dev;
188 error = EJUSTRETURN;
189 switch(bp->bio_cmd) {
190 case BIO_DELETE:
191 if (!(dp->d_flags & DISKFLAG_CANDELETE)) {
192 error = 0;
193 break;
194 }
195 /* fall-through */
196 case BIO_READ:
197 case BIO_WRITE:
| 133 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) {
134 if (dp->d_close != NULL || dp->d_cclose != NULL) {
135 g_disk_lock_giant(dp);
136 if (dp->d_close != NULL)
137 error = dp->d_close(dp);
138 else
139 error = dp->d_cclose(dev, FREAD|FWRITE, 0, NULL);
140 if (error != 0)
141 printf("Closed disk %s -> %d\n",
142 pp->name, error);
143 g_disk_unlock_giant(dp);
144 }
145 dp->d_flags &= ~DISKFLAG_OPEN;
146 }
147 return (error);
148}
149
150static void
151g_disk_kerneldump(struct bio *bp, struct disk *dp)
152{
153 int error;
154 struct g_kerneldump *gkd;
155 struct dumperinfo di;
156 struct g_geom *gp;
157
158 gkd = (struct g_kerneldump*)bp->bio_data;
159 gp = bp->bio_to->geom;
160 g_trace(G_T_TOPOLOGY, "g_disk_kernedump(%s, %jd, %jd)",
161 gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length);
162 di.dumper = dp->d_dump;
163 di.priv = dp->d_dev;
164 di.blocksize = dp->d_sectorsize;
165 di.mediaoffset = gkd->offset;
166 di.mediasize = gkd->length;
167 error = set_dumper(&di);
168 g_io_deliver(bp, error);
169}
170
171static void
172g_disk_done(struct bio *bp)
173{
174
175 /* See "notes" for why we need a mutex here */
176 /* XXX: will witness accept a mix of Giant/unGiant drivers here ? */
177 mtx_lock(&g_disk_done_mtx);
178 bp->bio_completed = bp->bio_length - bp->bio_resid;
179 g_std_done(bp);
180 mtx_unlock(&g_disk_done_mtx);
181}
182
183static void
184g_disk_start(struct bio *bp)
185{
186 struct bio *bp2, *bp3;
187 dev_t dev;
188 struct disk *dp;
189 struct g_ioctl *gio;
190 int error;
191 off_t off;
192
193 dp = bp->bio_to->geom->softc;
194 dev = dp->d_dev;
195 error = EJUSTRETURN;
196 switch(bp->bio_cmd) {
197 case BIO_DELETE:
198 if (!(dp->d_flags & DISKFLAG_CANDELETE)) {
199 error = 0;
200 break;
201 }
202 /* fall-through */
203 case BIO_READ:
204 case BIO_WRITE:
|
198 if (dp->d_dev->si_iosize_max != 0)
199 dp->d_maxsize = dp->d_dev->si_iosize_max;
200#ifdef maybe
201 else
202 /*
203 * XXX: Who knows how many drivers have undeclared
204 * limitations ?
205 */
206 dp->d_maxsize = DFLTPHYS;
207#endif
| |
208 off = 0;
209 bp3 = NULL;
210 bp2 = g_clone_bio(bp);
211 if (bp2 == NULL) {
212 error = ENOMEM;
213 break;
214 }
215 do {
216 bp2->bio_offset += off;
217 bp2->bio_length -= off;
218 bp2->bio_data -= off;
219 if (bp2->bio_length > dp->d_maxsize) {
220 /*
221 * XXX: If we have a stripesize we should really
222 * use it here.
223 */
224 bp2->bio_length = dp->d_maxsize;
225 off += dp->d_maxsize;
226 /*
227 * To avoid a race, we need to grab the next bio
228 * before we schedule this one. See "notes".
229 */
230 bp3 = g_clone_bio(bp);
231 if (bp3 == NULL)
232 bp->bio_error = ENOMEM;
233 }
234 bp2->bio_done = g_disk_done;
235 bp2->bio_blkno = bp2->bio_offset >> DEV_BSHIFT;
236 bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize;
237 bp2->bio_bcount = bp2->bio_length;
238 bp2->bio_dev = dev;
239 bp2->bio_disk = dp;
240 g_disk_lock_giant(dp);
241 dp->d_strategy(bp2);
242 g_disk_unlock_giant(dp);
243 bp2 = bp3;
244 bp3 = NULL;
245 } while (bp2 != NULL);
246 break;
247 case BIO_GETATTR:
248 if (g_handleattr_int(bp, "GEOM::fwsectors", dp->d_fwsectors))
249 break;
250 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads))
251 break;
252 else if (g_handleattr_off_t(bp, "GEOM::frontstuff", 0))
253 break;
254 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump"))
255 g_disk_kerneldump(bp, dp);
256 else if ((dp->d_ioctl != NULL || dp->d_cioctl != NULL) &&
257 !strcmp(bp->bio_attribute, "GEOM::ioctl") &&
258 bp->bio_length == sizeof *gio) {
259 gio = (struct g_ioctl *)bp->bio_data;
260 if (dp->d_ioctl != NULL) {
261 gio->func = (d_ioctl_t *)(dp->d_ioctl);
262 gio->dev = dp;
263 } else {
264 gio->func = dp->d_cioctl;
265 gio->dev = dp->d_dev;
266 }
267 error = EDIRIOCTL;
268 } else
269 error = ENOIOCTL;
270 break;
271 case BIO_SETATTR:
272 if (!strcmp(bp->bio_attribute, "GEOM::ioctl") &&
273 bp->bio_length == sizeof *gio) {
274 gio = (struct g_ioctl *)bp->bio_data;
275 gio->func = devsw(dp->d_dev)->d_ioctl;
276 gio->dev = dp->d_dev;
277 error = EDIRIOCTL;
278 } else
279 error = ENOIOCTL;
280 break;
281 default:
282 error = EOPNOTSUPP;
283 break;
284 }
285 if (error != EJUSTRETURN)
286 g_io_deliver(bp, error);
287 return;
288}
289
290static void
291g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp)
292{
293 struct disk *dp;
294
295 dp = gp->softc;
296 if (indent == NULL) {
297 sbuf_printf(sb, " hd %u", dp->d_fwheads);
298 sbuf_printf(sb, " sc %u", dp->d_fwsectors);
299 return;
300 }
301 if (pp != NULL) {
302 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n",
303 indent, dp->d_fwheads);
304 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n",
305 indent, dp->d_fwsectors);
306 }
307}
308
309static void
310g_disk_create(void *arg)
311{
312 struct g_geom *gp;
313 struct g_provider *pp;
314 struct disk *dp;
315
316 g_topology_assert();
317 dp = arg;
318 gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit);
319 gp->start = g_disk_start;
320 gp->access = g_disk_access;
321 gp->softc = dp;
322 gp->dumpconf = g_disk_dumpconf;
323 dp->d_geom = gp;
324 pp = g_new_providerf(gp, "%s", gp->name);
325 pp->mediasize = dp->d_mediasize;
326 pp->sectorsize = dp->d_sectorsize;
327 if (dp->d_flags & DISKFLAG_CANDELETE)
328 pp->flags |= G_PF_CANDELETE;
329 pp->stripeoffset = dp->d_stripeoffset;
330 pp->stripesize = dp->d_stripesize;
331 g_error_provider(pp, 0);
332 if (bootverbose)
333 printf("GEOM: new disk %s\n", gp->name);
334}
335
336
337
338dev_t
339disk_create(int unit, struct disk *dp, int flags, struct cdevsw *cdevsw, void * unused __unused)
340{
341 dev_t dev;
342
343 dev = g_malloc(sizeof *dev, M_ZERO);
344 dp->d_unit = unit;
345 dp->d_dev = dev;
346 dp->d_flags = flags;
347 dp->d_devsw = cdevsw;
348 dev->si_devsw = cdevsw;
349 if (cdevsw != NULL) {
350 dp->d_copen = cdevsw->d_open;
351 dp->d_cclose = cdevsw->d_close;
352 dp->d_cioctl = cdevsw->d_ioctl;
353 dp->d_strategy = cdevsw->d_strategy;
354 dp->d_dump = (dumper_t *)cdevsw->d_dump;
355 dp->d_name = cdevsw->d_name;
356 }
357 KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy"));
358 KASSERT(dp->d_name != NULL, ("disk_create need d_name"));
359 KASSERT(*dp->d_name != 0, ("disk_create need d_name"));
360 KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long"));
361 dev->si_disk = dp;
362 dev->si_udev = 0x10002; /* XXX: Needed ? */
363 dev->si_name = dev->__si_namebuf;
364 sprintf(dev->si_name, "%s%d", dp->d_name, unit);
365 g_call_me(g_disk_create, dp);
366 return (dev);
367}
368
369void
370disk_destroy(dev_t dev)
371{
372 struct disk *dp;
373 struct g_geom *gp;
374
375 dp = dev->si_disk;
376 gp = dp->d_geom;
377 g_free(dev);
378 gp->flags |= G_GEOM_WITHER;
379 gp->softc = NULL;
380 g_orphan_provider(LIST_FIRST(&gp->provider), ENXIO);
381}
382
383static void
384g_kern_disks(void *p)
385{
386 struct sbuf *sb;
387 struct g_geom *gp;
388 char *sp;
389
390 sb = p;
391 sp = "";
392 g_topology_assert();
393 LIST_FOREACH(gp, &g_disk_class.geom, geom) {
394 sbuf_printf(sb, "%s%s", sp, gp->name);
395 sp = " ";
396 }
397 sbuf_finish(sb);
398 wakeup(sb);
399}
400
401static int
402sysctl_disks(SYSCTL_HANDLER_ARGS)
403{
404 int error;
405 struct sbuf *sb;
406
407 sb = sbuf_new(NULL, NULL, 0, SBUF_AUTOEXTEND);
408 sbuf_clear(sb);
409 g_call_me(g_kern_disks, sb);
410 do {
411 tsleep(sb, PZERO, "kern.disks", hz);
412 } while(!sbuf_done(sb));
413 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
414 sbuf_delete(sb);
415 return error;
416}
417
418SYSCTL_PROC(_kern, OID_AUTO, disks, CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NOLOCK, 0, 0,
419 sysctl_disks, "A", "names of available disks");
420
| 205 off = 0;
206 bp3 = NULL;
207 bp2 = g_clone_bio(bp);
208 if (bp2 == NULL) {
209 error = ENOMEM;
210 break;
211 }
212 do {
213 bp2->bio_offset += off;
214 bp2->bio_length -= off;
215 bp2->bio_data -= off;
216 if (bp2->bio_length > dp->d_maxsize) {
217 /*
218 * XXX: If we have a stripesize we should really
219 * use it here.
220 */
221 bp2->bio_length = dp->d_maxsize;
222 off += dp->d_maxsize;
223 /*
224 * To avoid a race, we need to grab the next bio
225 * before we schedule this one. See "notes".
226 */
227 bp3 = g_clone_bio(bp);
228 if (bp3 == NULL)
229 bp->bio_error = ENOMEM;
230 }
231 bp2->bio_done = g_disk_done;
232 bp2->bio_blkno = bp2->bio_offset >> DEV_BSHIFT;
233 bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize;
234 bp2->bio_bcount = bp2->bio_length;
235 bp2->bio_dev = dev;
236 bp2->bio_disk = dp;
237 g_disk_lock_giant(dp);
238 dp->d_strategy(bp2);
239 g_disk_unlock_giant(dp);
240 bp2 = bp3;
241 bp3 = NULL;
242 } while (bp2 != NULL);
243 break;
244 case BIO_GETATTR:
245 if (g_handleattr_int(bp, "GEOM::fwsectors", dp->d_fwsectors))
246 break;
247 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads))
248 break;
249 else if (g_handleattr_off_t(bp, "GEOM::frontstuff", 0))
250 break;
251 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump"))
252 g_disk_kerneldump(bp, dp);
253 else if ((dp->d_ioctl != NULL || dp->d_cioctl != NULL) &&
254 !strcmp(bp->bio_attribute, "GEOM::ioctl") &&
255 bp->bio_length == sizeof *gio) {
256 gio = (struct g_ioctl *)bp->bio_data;
257 if (dp->d_ioctl != NULL) {
258 gio->func = (d_ioctl_t *)(dp->d_ioctl);
259 gio->dev = dp;
260 } else {
261 gio->func = dp->d_cioctl;
262 gio->dev = dp->d_dev;
263 }
264 error = EDIRIOCTL;
265 } else
266 error = ENOIOCTL;
267 break;
268 case BIO_SETATTR:
269 if (!strcmp(bp->bio_attribute, "GEOM::ioctl") &&
270 bp->bio_length == sizeof *gio) {
271 gio = (struct g_ioctl *)bp->bio_data;
272 gio->func = devsw(dp->d_dev)->d_ioctl;
273 gio->dev = dp->d_dev;
274 error = EDIRIOCTL;
275 } else
276 error = ENOIOCTL;
277 break;
278 default:
279 error = EOPNOTSUPP;
280 break;
281 }
282 if (error != EJUSTRETURN)
283 g_io_deliver(bp, error);
284 return;
285}
286
287static void
288g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp)
289{
290 struct disk *dp;
291
292 dp = gp->softc;
293 if (indent == NULL) {
294 sbuf_printf(sb, " hd %u", dp->d_fwheads);
295 sbuf_printf(sb, " sc %u", dp->d_fwsectors);
296 return;
297 }
298 if (pp != NULL) {
299 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n",
300 indent, dp->d_fwheads);
301 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n",
302 indent, dp->d_fwsectors);
303 }
304}
305
306static void
307g_disk_create(void *arg)
308{
309 struct g_geom *gp;
310 struct g_provider *pp;
311 struct disk *dp;
312
313 g_topology_assert();
314 dp = arg;
315 gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit);
316 gp->start = g_disk_start;
317 gp->access = g_disk_access;
318 gp->softc = dp;
319 gp->dumpconf = g_disk_dumpconf;
320 dp->d_geom = gp;
321 pp = g_new_providerf(gp, "%s", gp->name);
322 pp->mediasize = dp->d_mediasize;
323 pp->sectorsize = dp->d_sectorsize;
324 if (dp->d_flags & DISKFLAG_CANDELETE)
325 pp->flags |= G_PF_CANDELETE;
326 pp->stripeoffset = dp->d_stripeoffset;
327 pp->stripesize = dp->d_stripesize;
328 g_error_provider(pp, 0);
329 if (bootverbose)
330 printf("GEOM: new disk %s\n", gp->name);
331}
332
333
334
335dev_t
336disk_create(int unit, struct disk *dp, int flags, struct cdevsw *cdevsw, void * unused __unused)
337{
338 dev_t dev;
339
340 dev = g_malloc(sizeof *dev, M_ZERO);
341 dp->d_unit = unit;
342 dp->d_dev = dev;
343 dp->d_flags = flags;
344 dp->d_devsw = cdevsw;
345 dev->si_devsw = cdevsw;
346 if (cdevsw != NULL) {
347 dp->d_copen = cdevsw->d_open;
348 dp->d_cclose = cdevsw->d_close;
349 dp->d_cioctl = cdevsw->d_ioctl;
350 dp->d_strategy = cdevsw->d_strategy;
351 dp->d_dump = (dumper_t *)cdevsw->d_dump;
352 dp->d_name = cdevsw->d_name;
353 }
354 KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy"));
355 KASSERT(dp->d_name != NULL, ("disk_create need d_name"));
356 KASSERT(*dp->d_name != 0, ("disk_create need d_name"));
357 KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long"));
358 dev->si_disk = dp;
359 dev->si_udev = 0x10002; /* XXX: Needed ? */
360 dev->si_name = dev->__si_namebuf;
361 sprintf(dev->si_name, "%s%d", dp->d_name, unit);
362 g_call_me(g_disk_create, dp);
363 return (dev);
364}
365
366void
367disk_destroy(dev_t dev)
368{
369 struct disk *dp;
370 struct g_geom *gp;
371
372 dp = dev->si_disk;
373 gp = dp->d_geom;
374 g_free(dev);
375 gp->flags |= G_GEOM_WITHER;
376 gp->softc = NULL;
377 g_orphan_provider(LIST_FIRST(&gp->provider), ENXIO);
378}
379
380static void
381g_kern_disks(void *p)
382{
383 struct sbuf *sb;
384 struct g_geom *gp;
385 char *sp;
386
387 sb = p;
388 sp = "";
389 g_topology_assert();
390 LIST_FOREACH(gp, &g_disk_class.geom, geom) {
391 sbuf_printf(sb, "%s%s", sp, gp->name);
392 sp = " ";
393 }
394 sbuf_finish(sb);
395 wakeup(sb);
396}
397
398static int
399sysctl_disks(SYSCTL_HANDLER_ARGS)
400{
401 int error;
402 struct sbuf *sb;
403
404 sb = sbuf_new(NULL, NULL, 0, SBUF_AUTOEXTEND);
405 sbuf_clear(sb);
406 g_call_me(g_kern_disks, sb);
407 do {
408 tsleep(sb, PZERO, "kern.disks", hz);
409 } while(!sbuf_done(sb));
410 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
411 sbuf_delete(sb);
412 return error;
413}
414
415SYSCTL_PROC(_kern, OID_AUTO, disks, CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NOLOCK, 0, 0,
416 sysctl_disks, "A", "names of available disks");
417
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