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
36#include <sys/cdefs.h>
| 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
36#include <sys/cdefs.h>
|
47#include <sys/ctype.h>
48#include <sys/fcntl.h>
49#include <sys/malloc.h>
50#include <sys/sysctl.h>
51#include <sys/devicestat.h>
52#include <machine/md_var.h>
53
54#include <sys/lock.h>
55#include <sys/mutex.h>
56#include <geom/geom.h>
57#include <geom/geom_disk.h>
58#include <geom/geom_int.h>
59
60static struct mtx g_disk_done_mtx;
61
62static g_access_t g_disk_access;
63static g_init_t g_disk_init;
64static g_fini_t g_disk_fini;
65static g_start_t g_disk_start;
66static g_ioctl_t g_disk_ioctl;
67static g_dumpconf_t g_disk_dumpconf;
68
69static struct g_class g_disk_class = {
70 .name = "DISK",
71 .version = G_VERSION,
72 .init = g_disk_init,
73 .fini = g_disk_fini,
74 .start = g_disk_start,
75 .access = g_disk_access,
76 .ioctl = g_disk_ioctl,
77 .dumpconf = g_disk_dumpconf,
78};
79
80static void
81g_disk_init(struct g_class *mp __unused)
82{
83
84 mtx_init(&g_disk_done_mtx, "g_disk_done", NULL, MTX_DEF);
85}
86
87static void
88g_disk_fini(struct g_class *mp __unused)
89{
90
91 mtx_destroy(&g_disk_done_mtx);
92}
93
94DECLARE_GEOM_CLASS(g_disk_class, g_disk);
95
96static void __inline
97g_disk_lock_giant(struct disk *dp)
98{
99 if (dp->d_flags & DISKFLAG_NEEDSGIANT)
100 mtx_lock(&Giant);
101}
102
103static void __inline
104g_disk_unlock_giant(struct disk *dp)
105{
106 if (dp->d_flags & DISKFLAG_NEEDSGIANT)
107 mtx_unlock(&Giant);
108}
109
110static int
111g_disk_access(struct g_provider *pp, int r, int w, int e)
112{
113 struct disk *dp;
114 int error;
115
116 g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)",
117 pp->name, r, w, e);
118 g_topology_assert();
119 dp = pp->geom->softc;
120 if (dp == NULL || dp->d_destroyed) {
121 /*
122 * Allow decreasing access count even if disk is not
123 * avaliable anymore.
124 */
125 if (r <= 0 && w <= 0 && e <= 0)
126 return (0);
127 return (ENXIO);
128 }
129 r += pp->acr;
130 w += pp->acw;
131 e += pp->ace;
132 error = 0;
133 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) {
134 if (dp->d_open != NULL) {
135 g_disk_lock_giant(dp);
136 error = dp->d_open(dp);
137 if (bootverbose && error != 0)
138 printf("Opened disk %s -> %d\n",
139 pp->name, error);
140 g_disk_unlock_giant(dp);
141 }
142 pp->mediasize = dp->d_mediasize;
143 pp->sectorsize = dp->d_sectorsize;
144 dp->d_flags |= DISKFLAG_OPEN;
145 if (dp->d_maxsize == 0) {
146 printf("WARNING: Disk drive %s%d has no d_maxsize\n",
147 dp->d_name, dp->d_unit);
148 dp->d_maxsize = DFLTPHYS;
149 }
150 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) {
151 if (dp->d_close != NULL) {
152 g_disk_lock_giant(dp);
153 error = dp->d_close(dp);
154 if (error != 0)
155 printf("Closed disk %s -> %d\n",
156 pp->name, error);
157 g_disk_unlock_giant(dp);
158 }
159 dp->d_flags &= ~DISKFLAG_OPEN;
160 }
161 return (error);
162}
163
164static void
165g_disk_kerneldump(struct bio *bp, struct disk *dp)
| 46#include <sys/ctype.h>
47#include <sys/fcntl.h>
48#include <sys/malloc.h>
49#include <sys/sysctl.h>
50#include <sys/devicestat.h>
51#include <machine/md_var.h>
52
53#include <sys/lock.h>
54#include <sys/mutex.h>
55#include <geom/geom.h>
56#include <geom/geom_disk.h>
57#include <geom/geom_int.h>
58
59static struct mtx g_disk_done_mtx;
60
61static g_access_t g_disk_access;
62static g_init_t g_disk_init;
63static g_fini_t g_disk_fini;
64static g_start_t g_disk_start;
65static g_ioctl_t g_disk_ioctl;
66static g_dumpconf_t g_disk_dumpconf;
67
68static struct g_class g_disk_class = {
69 .name = "DISK",
70 .version = G_VERSION,
71 .init = g_disk_init,
72 .fini = g_disk_fini,
73 .start = g_disk_start,
74 .access = g_disk_access,
75 .ioctl = g_disk_ioctl,
76 .dumpconf = g_disk_dumpconf,
77};
78
79static void
80g_disk_init(struct g_class *mp __unused)
81{
82
83 mtx_init(&g_disk_done_mtx, "g_disk_done", NULL, MTX_DEF);
84}
85
86static void
87g_disk_fini(struct g_class *mp __unused)
88{
89
90 mtx_destroy(&g_disk_done_mtx);
91}
92
93DECLARE_GEOM_CLASS(g_disk_class, g_disk);
94
95static void __inline
96g_disk_lock_giant(struct disk *dp)
97{
98 if (dp->d_flags & DISKFLAG_NEEDSGIANT)
99 mtx_lock(&Giant);
100}
101
102static void __inline
103g_disk_unlock_giant(struct disk *dp)
104{
105 if (dp->d_flags & DISKFLAG_NEEDSGIANT)
106 mtx_unlock(&Giant);
107}
108
109static int
110g_disk_access(struct g_provider *pp, int r, int w, int e)
111{
112 struct disk *dp;
113 int error;
114
115 g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)",
116 pp->name, r, w, e);
117 g_topology_assert();
118 dp = pp->geom->softc;
119 if (dp == NULL || dp->d_destroyed) {
120 /*
121 * Allow decreasing access count even if disk is not
122 * avaliable anymore.
123 */
124 if (r <= 0 && w <= 0 && e <= 0)
125 return (0);
126 return (ENXIO);
127 }
128 r += pp->acr;
129 w += pp->acw;
130 e += pp->ace;
131 error = 0;
132 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) {
133 if (dp->d_open != NULL) {
134 g_disk_lock_giant(dp);
135 error = dp->d_open(dp);
136 if (bootverbose && error != 0)
137 printf("Opened disk %s -> %d\n",
138 pp->name, error);
139 g_disk_unlock_giant(dp);
140 }
141 pp->mediasize = dp->d_mediasize;
142 pp->sectorsize = dp->d_sectorsize;
143 dp->d_flags |= DISKFLAG_OPEN;
144 if (dp->d_maxsize == 0) {
145 printf("WARNING: Disk drive %s%d has no d_maxsize\n",
146 dp->d_name, dp->d_unit);
147 dp->d_maxsize = DFLTPHYS;
148 }
149 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) {
150 if (dp->d_close != NULL) {
151 g_disk_lock_giant(dp);
152 error = dp->d_close(dp);
153 if (error != 0)
154 printf("Closed disk %s -> %d\n",
155 pp->name, error);
156 g_disk_unlock_giant(dp);
157 }
158 dp->d_flags &= ~DISKFLAG_OPEN;
159 }
160 return (error);
161}
162
163static void
164g_disk_kerneldump(struct bio *bp, struct disk *dp)
|
190}
191
192static void
193g_disk_done(struct bio *bp)
194{
195 struct bio *bp2;
196 struct disk *dp;
197
198 /* See "notes" for why we need a mutex here */
199 /* XXX: will witness accept a mix of Giant/unGiant drivers here ? */
200 mtx_lock(&g_disk_done_mtx);
201 bp->bio_completed = bp->bio_length - bp->bio_resid;
202
203 bp2 = bp->bio_parent;
204 if (bp2->bio_error == 0)
205 bp2->bio_error = bp->bio_error;
206 bp2->bio_completed += bp->bio_completed;
207 if ((bp->bio_cmd & (BIO_READ|BIO_WRITE|BIO_DELETE)) &&
208 (dp = bp2->bio_to->geom->softc)) {
209 devstat_end_transaction_bio(dp->d_devstat, bp);
210 }
211 g_destroy_bio(bp);
212 bp2->bio_inbed++;
213 if (bp2->bio_children == bp2->bio_inbed) {
214 bp2->bio_resid = bp2->bio_bcount - bp2->bio_completed;
215 g_io_deliver(bp2, bp2->bio_error);
216 }
217 mtx_unlock(&g_disk_done_mtx);
218}
219
220static int
221g_disk_ioctl(struct g_provider *pp, u_long cmd, void * data, int fflag, struct thread *td)
222{
223 struct g_geom *gp;
224 struct disk *dp;
225 int error;
226
227 gp = pp->geom;
228 dp = gp->softc;
229
230 if (dp->d_ioctl == NULL)
231 return (ENOIOCTL);
232 g_disk_lock_giant(dp);
233 error = dp->d_ioctl(dp, cmd, data, fflag, td);
234 g_disk_unlock_giant(dp);
235 return(error);
236}
237
238static void
239g_disk_start(struct bio *bp)
240{
241 struct bio *bp2, *bp3;
242 struct disk *dp;
243 int error;
244 off_t off;
245
246 dp = bp->bio_to->geom->softc;
247 if (dp == NULL || dp->d_destroyed) {
248 g_io_deliver(bp, ENXIO);
249 return;
250 }
251 error = EJUSTRETURN;
252 switch(bp->bio_cmd) {
253 case BIO_DELETE:
254 if (!(dp->d_flags & DISKFLAG_CANDELETE)) {
255 error = 0;
256 break;
257 }
258 /* fall-through */
259 case BIO_READ:
260 case BIO_WRITE:
261 off = 0;
262 bp3 = NULL;
263 bp2 = g_clone_bio(bp);
264 if (bp2 == NULL) {
265 error = ENOMEM;
266 break;
267 }
268 do {
269 bp2->bio_offset += off;
270 bp2->bio_length -= off;
271 bp2->bio_data += off;
272 if (bp2->bio_length > dp->d_maxsize) {
273 /*
274 * XXX: If we have a stripesize we should really
275 * use it here.
276 */
277 bp2->bio_length = dp->d_maxsize;
278 off += dp->d_maxsize;
279 /*
280 * To avoid a race, we need to grab the next bio
281 * before we schedule this one. See "notes".
282 */
283 bp3 = g_clone_bio(bp);
284 if (bp3 == NULL)
285 bp->bio_error = ENOMEM;
286 }
287 bp2->bio_done = g_disk_done;
288 bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize;
289 bp2->bio_bcount = bp2->bio_length;
290 bp2->bio_disk = dp;
291 devstat_start_transaction_bio(dp->d_devstat, bp2);
292 g_disk_lock_giant(dp);
293 dp->d_strategy(bp2);
294 g_disk_unlock_giant(dp);
295 bp2 = bp3;
296 bp3 = NULL;
297 } while (bp2 != NULL);
298 break;
299 case BIO_GETATTR:
300 if (g_handleattr_int(bp, "GEOM::candelete",
301 (dp->d_flags & DISKFLAG_CANDELETE) != 0))
302 break;
303 else if (g_handleattr_int(bp, "GEOM::fwsectors",
304 dp->d_fwsectors))
305 break;
306 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads))
307 break;
308 else if (g_handleattr_off_t(bp, "GEOM::frontstuff", 0))
309 break;
310 else if (g_handleattr_str(bp, "GEOM::ident", dp->d_ident))
311 break;
312 else if (g_handleattr(bp, "GEOM::hba_vendor",
313 &dp->d_hba_vendor, 2))
314 break;
315 else if (g_handleattr(bp, "GEOM::hba_device",
316 &dp->d_hba_device, 2))
317 break;
318 else if (g_handleattr(bp, "GEOM::hba_subvendor",
319 &dp->d_hba_subvendor, 2))
320 break;
321 else if (g_handleattr(bp, "GEOM::hba_subdevice",
322 &dp->d_hba_subdevice, 2))
323 break;
324 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump"))
325 g_disk_kerneldump(bp, dp);
326 else
327 error = ENOIOCTL;
328 break;
329 case BIO_FLUSH:
330 g_trace(G_T_TOPOLOGY, "g_disk_flushcache(%s)",
331 bp->bio_to->name);
332 if (!(dp->d_flags & DISKFLAG_CANFLUSHCACHE)) {
333 g_io_deliver(bp, ENODEV);
334 return;
335 }
336 bp2 = g_clone_bio(bp);
337 if (bp2 == NULL) {
338 g_io_deliver(bp, ENOMEM);
339 return;
340 }
341 bp2->bio_done = g_disk_done;
342 bp2->bio_disk = dp;
343 g_disk_lock_giant(dp);
344 dp->d_strategy(bp2);
345 g_disk_unlock_giant(dp);
346 break;
347 default:
348 error = EOPNOTSUPP;
349 break;
350 }
351 if (error != EJUSTRETURN)
352 g_io_deliver(bp, error);
353 return;
354}
355
356static void
357g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp)
358{
359 struct disk *dp;
360
361 dp = gp->softc;
362 if (dp == NULL)
363 return;
364 if (indent == NULL) {
365 sbuf_printf(sb, " hd %u", dp->d_fwheads);
366 sbuf_printf(sb, " sc %u", dp->d_fwsectors);
367 return;
368 }
369 if (pp != NULL) {
370 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n",
371 indent, dp->d_fwheads);
372 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n",
373 indent, dp->d_fwsectors);
374 sbuf_printf(sb, "%s<ident>%s</ident>\n", indent, dp->d_ident);
375 sbuf_printf(sb, "%s<descr>%s</descr>\n", indent, dp->d_descr);
376 }
377}
378
379static void
380g_disk_create(void *arg, int flag)
381{
382 struct g_geom *gp;
383 struct g_provider *pp;
384 struct disk *dp;
385
386 if (flag == EV_CANCEL)
387 return;
388 g_topology_assert();
389 dp = arg;
390 gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit);
391 gp->softc = dp;
392 pp = g_new_providerf(gp, "%s", gp->name);
393 pp->mediasize = dp->d_mediasize;
394 pp->sectorsize = dp->d_sectorsize;
395 if (dp->d_flags & DISKFLAG_CANDELETE)
396 pp->flags |= G_PF_CANDELETE;
397 pp->stripeoffset = dp->d_stripeoffset;
398 pp->stripesize = dp->d_stripesize;
399 if (bootverbose)
400 printf("GEOM: new disk %s\n", gp->name);
401 dp->d_geom = gp;
402 g_error_provider(pp, 0);
403}
404
405static void
406g_disk_destroy(void *ptr, int flag)
407{
408 struct disk *dp;
409 struct g_geom *gp;
410
411 g_topology_assert();
412 dp = ptr;
413 gp = dp->d_geom;
414 if (gp != NULL) {
415 gp->softc = NULL;
416 g_wither_geom(gp, ENXIO);
417 }
418 g_free(dp);
419}
420
421/*
422 * We only allow printable characters in disk ident,
423 * the rest is converted to 'x<HH>'.
424 */
425static void
426g_disk_ident_adjust(char *ident, size_t size)
427{
428 char *p, tmp[4], newid[DISK_IDENT_SIZE];
429
430 newid[0] = '\0';
431 for (p = ident; *p != '\0'; p++) {
432 if (isprint(*p)) {
433 tmp[0] = *p;
434 tmp[1] = '\0';
435 } else {
436 snprintf(tmp, sizeof(tmp), "x%02hhx",
437 *(unsigned char *)p);
438 }
439 if (strlcat(newid, tmp, sizeof(newid)) >= sizeof(newid))
440 break;
441 }
442 bzero(ident, size);
443 strlcpy(ident, newid, size);
444}
445
446struct disk *
447disk_alloc()
448{
449 struct disk *dp;
450
451 dp = g_malloc(sizeof *dp, M_WAITOK | M_ZERO);
452 return (dp);
453}
454
455void
456disk_create(struct disk *dp, int version)
457{
458 if (version != DISK_VERSION_00 && version != DISK_VERSION_01) {
459 printf("WARNING: Attempt to add disk %s%d %s",
460 dp->d_name, dp->d_unit,
461 " using incompatible ABI version of disk(9)\n");
462 printf("WARNING: Ignoring disk %s%d\n",
463 dp->d_name, dp->d_unit);
464 return;
465 }
466 KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy"));
467 KASSERT(dp->d_name != NULL, ("disk_create need d_name"));
468 KASSERT(*dp->d_name != 0, ("disk_create need d_name"));
469 KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long"));
470 if (dp->d_devstat == NULL)
471 dp->d_devstat = devstat_new_entry(dp->d_name, dp->d_unit,
472 dp->d_sectorsize, DEVSTAT_ALL_SUPPORTED,
473 DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX);
474 dp->d_geom = NULL;
475 g_disk_ident_adjust(dp->d_ident, sizeof(dp->d_ident));
476 g_post_event(g_disk_create, dp, M_WAITOK, dp, NULL);
477}
478
479void
480disk_destroy(struct disk *dp)
481{
482
483 g_cancel_event(dp);
484 dp->d_destroyed = 1;
485 if (dp->d_devstat != NULL)
486 devstat_remove_entry(dp->d_devstat);
487 g_post_event(g_disk_destroy, dp, M_WAITOK, NULL);
488}
489
490void
491disk_gone(struct disk *dp)
492{
493 struct g_geom *gp;
494 struct g_provider *pp;
495
496 gp = dp->d_geom;
497 if (gp != NULL)
498 LIST_FOREACH(pp, &gp->provider, provider)
499 g_wither_provider(pp, ENXIO);
500}
501
502static void
503g_kern_disks(void *p, int flag __unused)
504{
505 struct sbuf *sb;
506 struct g_geom *gp;
507 char *sp;
508
509 sb = p;
510 sp = "";
511 g_topology_assert();
512 LIST_FOREACH(gp, &g_disk_class.geom, geom) {
513 sbuf_printf(sb, "%s%s", sp, gp->name);
514 sp = " ";
515 }
516 sbuf_finish(sb);
517}
518
519static int
520sysctl_disks(SYSCTL_HANDLER_ARGS)
521{
522 int error;
523 struct sbuf *sb;
524
525 sb = sbuf_new_auto();
526 g_waitfor_event(g_kern_disks, sb, M_WAITOK, NULL);
527 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
528 sbuf_delete(sb);
529 return error;
530}
531
532SYSCTL_PROC(_kern, OID_AUTO, disks,
533 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
534 sysctl_disks, "A", "names of available disks");
535
| 186}
187
188static void
189g_disk_done(struct bio *bp)
190{
191 struct bio *bp2;
192 struct disk *dp;
193
194 /* See "notes" for why we need a mutex here */
195 /* XXX: will witness accept a mix of Giant/unGiant drivers here ? */
196 mtx_lock(&g_disk_done_mtx);
197 bp->bio_completed = bp->bio_length - bp->bio_resid;
198
199 bp2 = bp->bio_parent;
200 if (bp2->bio_error == 0)
201 bp2->bio_error = bp->bio_error;
202 bp2->bio_completed += bp->bio_completed;
203 if ((bp->bio_cmd & (BIO_READ|BIO_WRITE|BIO_DELETE)) &&
204 (dp = bp2->bio_to->geom->softc)) {
205 devstat_end_transaction_bio(dp->d_devstat, bp);
206 }
207 g_destroy_bio(bp);
208 bp2->bio_inbed++;
209 if (bp2->bio_children == bp2->bio_inbed) {
210 bp2->bio_resid = bp2->bio_bcount - bp2->bio_completed;
211 g_io_deliver(bp2, bp2->bio_error);
212 }
213 mtx_unlock(&g_disk_done_mtx);
214}
215
216static int
217g_disk_ioctl(struct g_provider *pp, u_long cmd, void * data, int fflag, struct thread *td)
218{
219 struct g_geom *gp;
220 struct disk *dp;
221 int error;
222
223 gp = pp->geom;
224 dp = gp->softc;
225
226 if (dp->d_ioctl == NULL)
227 return (ENOIOCTL);
228 g_disk_lock_giant(dp);
229 error = dp->d_ioctl(dp, cmd, data, fflag, td);
230 g_disk_unlock_giant(dp);
231 return(error);
232}
233
234static void
235g_disk_start(struct bio *bp)
236{
237 struct bio *bp2, *bp3;
238 struct disk *dp;
239 int error;
240 off_t off;
241
242 dp = bp->bio_to->geom->softc;
243 if (dp == NULL || dp->d_destroyed) {
244 g_io_deliver(bp, ENXIO);
245 return;
246 }
247 error = EJUSTRETURN;
248 switch(bp->bio_cmd) {
249 case BIO_DELETE:
250 if (!(dp->d_flags & DISKFLAG_CANDELETE)) {
251 error = 0;
252 break;
253 }
254 /* fall-through */
255 case BIO_READ:
256 case BIO_WRITE:
257 off = 0;
258 bp3 = NULL;
259 bp2 = g_clone_bio(bp);
260 if (bp2 == NULL) {
261 error = ENOMEM;
262 break;
263 }
264 do {
265 bp2->bio_offset += off;
266 bp2->bio_length -= off;
267 bp2->bio_data += off;
268 if (bp2->bio_length > dp->d_maxsize) {
269 /*
270 * XXX: If we have a stripesize we should really
271 * use it here.
272 */
273 bp2->bio_length = dp->d_maxsize;
274 off += dp->d_maxsize;
275 /*
276 * To avoid a race, we need to grab the next bio
277 * before we schedule this one. See "notes".
278 */
279 bp3 = g_clone_bio(bp);
280 if (bp3 == NULL)
281 bp->bio_error = ENOMEM;
282 }
283 bp2->bio_done = g_disk_done;
284 bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize;
285 bp2->bio_bcount = bp2->bio_length;
286 bp2->bio_disk = dp;
287 devstat_start_transaction_bio(dp->d_devstat, bp2);
288 g_disk_lock_giant(dp);
289 dp->d_strategy(bp2);
290 g_disk_unlock_giant(dp);
291 bp2 = bp3;
292 bp3 = NULL;
293 } while (bp2 != NULL);
294 break;
295 case BIO_GETATTR:
296 if (g_handleattr_int(bp, "GEOM::candelete",
297 (dp->d_flags & DISKFLAG_CANDELETE) != 0))
298 break;
299 else if (g_handleattr_int(bp, "GEOM::fwsectors",
300 dp->d_fwsectors))
301 break;
302 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads))
303 break;
304 else if (g_handleattr_off_t(bp, "GEOM::frontstuff", 0))
305 break;
306 else if (g_handleattr_str(bp, "GEOM::ident", dp->d_ident))
307 break;
308 else if (g_handleattr(bp, "GEOM::hba_vendor",
309 &dp->d_hba_vendor, 2))
310 break;
311 else if (g_handleattr(bp, "GEOM::hba_device",
312 &dp->d_hba_device, 2))
313 break;
314 else if (g_handleattr(bp, "GEOM::hba_subvendor",
315 &dp->d_hba_subvendor, 2))
316 break;
317 else if (g_handleattr(bp, "GEOM::hba_subdevice",
318 &dp->d_hba_subdevice, 2))
319 break;
320 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump"))
321 g_disk_kerneldump(bp, dp);
322 else
323 error = ENOIOCTL;
324 break;
325 case BIO_FLUSH:
326 g_trace(G_T_TOPOLOGY, "g_disk_flushcache(%s)",
327 bp->bio_to->name);
328 if (!(dp->d_flags & DISKFLAG_CANFLUSHCACHE)) {
329 g_io_deliver(bp, ENODEV);
330 return;
331 }
332 bp2 = g_clone_bio(bp);
333 if (bp2 == NULL) {
334 g_io_deliver(bp, ENOMEM);
335 return;
336 }
337 bp2->bio_done = g_disk_done;
338 bp2->bio_disk = dp;
339 g_disk_lock_giant(dp);
340 dp->d_strategy(bp2);
341 g_disk_unlock_giant(dp);
342 break;
343 default:
344 error = EOPNOTSUPP;
345 break;
346 }
347 if (error != EJUSTRETURN)
348 g_io_deliver(bp, error);
349 return;
350}
351
352static void
353g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp)
354{
355 struct disk *dp;
356
357 dp = gp->softc;
358 if (dp == NULL)
359 return;
360 if (indent == NULL) {
361 sbuf_printf(sb, " hd %u", dp->d_fwheads);
362 sbuf_printf(sb, " sc %u", dp->d_fwsectors);
363 return;
364 }
365 if (pp != NULL) {
366 sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n",
367 indent, dp->d_fwheads);
368 sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n",
369 indent, dp->d_fwsectors);
370 sbuf_printf(sb, "%s<ident>%s</ident>\n", indent, dp->d_ident);
371 sbuf_printf(sb, "%s<descr>%s</descr>\n", indent, dp->d_descr);
372 }
373}
374
375static void
376g_disk_create(void *arg, int flag)
377{
378 struct g_geom *gp;
379 struct g_provider *pp;
380 struct disk *dp;
381
382 if (flag == EV_CANCEL)
383 return;
384 g_topology_assert();
385 dp = arg;
386 gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit);
387 gp->softc = dp;
388 pp = g_new_providerf(gp, "%s", gp->name);
389 pp->mediasize = dp->d_mediasize;
390 pp->sectorsize = dp->d_sectorsize;
391 if (dp->d_flags & DISKFLAG_CANDELETE)
392 pp->flags |= G_PF_CANDELETE;
393 pp->stripeoffset = dp->d_stripeoffset;
394 pp->stripesize = dp->d_stripesize;
395 if (bootverbose)
396 printf("GEOM: new disk %s\n", gp->name);
397 dp->d_geom = gp;
398 g_error_provider(pp, 0);
399}
400
401static void
402g_disk_destroy(void *ptr, int flag)
403{
404 struct disk *dp;
405 struct g_geom *gp;
406
407 g_topology_assert();
408 dp = ptr;
409 gp = dp->d_geom;
410 if (gp != NULL) {
411 gp->softc = NULL;
412 g_wither_geom(gp, ENXIO);
413 }
414 g_free(dp);
415}
416
417/*
418 * We only allow printable characters in disk ident,
419 * the rest is converted to 'x<HH>'.
420 */
421static void
422g_disk_ident_adjust(char *ident, size_t size)
423{
424 char *p, tmp[4], newid[DISK_IDENT_SIZE];
425
426 newid[0] = '\0';
427 for (p = ident; *p != '\0'; p++) {
428 if (isprint(*p)) {
429 tmp[0] = *p;
430 tmp[1] = '\0';
431 } else {
432 snprintf(tmp, sizeof(tmp), "x%02hhx",
433 *(unsigned char *)p);
434 }
435 if (strlcat(newid, tmp, sizeof(newid)) >= sizeof(newid))
436 break;
437 }
438 bzero(ident, size);
439 strlcpy(ident, newid, size);
440}
441
442struct disk *
443disk_alloc()
444{
445 struct disk *dp;
446
447 dp = g_malloc(sizeof *dp, M_WAITOK | M_ZERO);
448 return (dp);
449}
450
451void
452disk_create(struct disk *dp, int version)
453{
454 if (version != DISK_VERSION_00 && version != DISK_VERSION_01) {
455 printf("WARNING: Attempt to add disk %s%d %s",
456 dp->d_name, dp->d_unit,
457 " using incompatible ABI version of disk(9)\n");
458 printf("WARNING: Ignoring disk %s%d\n",
459 dp->d_name, dp->d_unit);
460 return;
461 }
462 KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy"));
463 KASSERT(dp->d_name != NULL, ("disk_create need d_name"));
464 KASSERT(*dp->d_name != 0, ("disk_create need d_name"));
465 KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long"));
466 if (dp->d_devstat == NULL)
467 dp->d_devstat = devstat_new_entry(dp->d_name, dp->d_unit,
468 dp->d_sectorsize, DEVSTAT_ALL_SUPPORTED,
469 DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX);
470 dp->d_geom = NULL;
471 g_disk_ident_adjust(dp->d_ident, sizeof(dp->d_ident));
472 g_post_event(g_disk_create, dp, M_WAITOK, dp, NULL);
473}
474
475void
476disk_destroy(struct disk *dp)
477{
478
479 g_cancel_event(dp);
480 dp->d_destroyed = 1;
481 if (dp->d_devstat != NULL)
482 devstat_remove_entry(dp->d_devstat);
483 g_post_event(g_disk_destroy, dp, M_WAITOK, NULL);
484}
485
486void
487disk_gone(struct disk *dp)
488{
489 struct g_geom *gp;
490 struct g_provider *pp;
491
492 gp = dp->d_geom;
493 if (gp != NULL)
494 LIST_FOREACH(pp, &gp->provider, provider)
495 g_wither_provider(pp, ENXIO);
496}
497
498static void
499g_kern_disks(void *p, int flag __unused)
500{
501 struct sbuf *sb;
502 struct g_geom *gp;
503 char *sp;
504
505 sb = p;
506 sp = "";
507 g_topology_assert();
508 LIST_FOREACH(gp, &g_disk_class.geom, geom) {
509 sbuf_printf(sb, "%s%s", sp, gp->name);
510 sp = " ";
511 }
512 sbuf_finish(sb);
513}
514
515static int
516sysctl_disks(SYSCTL_HANDLER_ARGS)
517{
518 int error;
519 struct sbuf *sb;
520
521 sb = sbuf_new_auto();
522 g_waitfor_event(g_kern_disks, sb, M_WAITOK, NULL);
523 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
524 sbuf_delete(sb);
525 return error;
526}
527
528SYSCTL_PROC(_kern, OID_AUTO, disks,
529 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
530 sysctl_disks, "A", "names of available disks");
531
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