1 /*-
2 * Copyright (c) 2005 Pawel Jakub Dawidek <pjd@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD: releng/11.0/sys/geom/shsec/g_shsec.c 267992 2014-06-28 03:56:17Z hselasky $");
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/kernel.h>
33 #include <sys/module.h>
34 #include <sys/lock.h>
35 #include <sys/mutex.h>
36 #include <sys/bio.h>
37 #include <sys/sbuf.h>
38 #include <sys/sysctl.h>
39 #include <sys/malloc.h>
40 #include <vm/uma.h>
41 #include <geom/geom.h>
42 #include <geom/shsec/g_shsec.h>
43
44 FEATURE(geom_shsec, "GEOM shared secret device support");
45
46 static MALLOC_DEFINE(M_SHSEC, "shsec_data", "GEOM_SHSEC Data");
47
48 static uma_zone_t g_shsec_zone;
49
50 static int g_shsec_destroy(struct g_shsec_softc *sc, boolean_t force);
51 static int g_shsec_destroy_geom(struct gctl_req *req, struct g_class *mp,
52 struct g_geom *gp);
53
54 static g_taste_t g_shsec_taste;
55 static g_ctl_req_t g_shsec_config;
56 static g_dumpconf_t g_shsec_dumpconf;
57 static g_init_t g_shsec_init;
58 static g_fini_t g_shsec_fini;
59
60 struct g_class g_shsec_class = {
61 .name = G_SHSEC_CLASS_NAME,
62 .version = G_VERSION,
63 .ctlreq = g_shsec_config,
64 .taste = g_shsec_taste,
65 .destroy_geom = g_shsec_destroy_geom,
66 .init = g_shsec_init,
67 .fini = g_shsec_fini
68 };
69
70 SYSCTL_DECL(_kern_geom);
71 static SYSCTL_NODE(_kern_geom, OID_AUTO, shsec, CTLFLAG_RW, 0,
72 "GEOM_SHSEC stuff");
73 static u_int g_shsec_debug = 0;
74 SYSCTL_UINT(_kern_geom_shsec, OID_AUTO, debug, CTLFLAG_RWTUN, &g_shsec_debug, 0,
75 "Debug level");
76 static u_int g_shsec_maxmem = MAXPHYS * 100;
77 SYSCTL_UINT(_kern_geom_shsec, OID_AUTO, maxmem, CTLFLAG_RDTUN, &g_shsec_maxmem,
78 0, "Maximum memory that can be allocated for I/O (in bytes)");
79 static u_int g_shsec_alloc_failed = 0;
80 SYSCTL_UINT(_kern_geom_shsec, OID_AUTO, alloc_failed, CTLFLAG_RD,
81 &g_shsec_alloc_failed, 0, "How many times I/O allocation failed");
82
83 /*
84 * Greatest Common Divisor.
85 */
86 static u_int
87 gcd(u_int a, u_int b)
88 {
89 u_int c;
90
91 while (b != 0) {
92 c = a;
93 a = b;
94 b = (c % b);
95 }
96 return (a);
97 }
98
99 /*
100 * Least Common Multiple.
101 */
102 static u_int
103 lcm(u_int a, u_int b)
104 {
105
106 return ((a * b) / gcd(a, b));
107 }
108
109 static void
110 g_shsec_init(struct g_class *mp __unused)
111 {
112
113 g_shsec_zone = uma_zcreate("g_shsec_zone", MAXPHYS, NULL, NULL, NULL,
114 NULL, 0, 0);
115 g_shsec_maxmem -= g_shsec_maxmem % MAXPHYS;
116 uma_zone_set_max(g_shsec_zone, g_shsec_maxmem / MAXPHYS);
117 }
118
119 static void
120 g_shsec_fini(struct g_class *mp __unused)
121 {
122
123 uma_zdestroy(g_shsec_zone);
124 }
125
126 /*
127 * Return the number of valid disks.
128 */
129 static u_int
130 g_shsec_nvalid(struct g_shsec_softc *sc)
131 {
132 u_int i, no;
133
134 no = 0;
135 for (i = 0; i < sc->sc_ndisks; i++) {
136 if (sc->sc_disks[i] != NULL)
137 no++;
138 }
139
140 return (no);
141 }
142
143 static void
144 g_shsec_remove_disk(struct g_consumer *cp)
145 {
146 struct g_shsec_softc *sc;
147 u_int no;
148
149 KASSERT(cp != NULL, ("Non-valid disk in %s.", __func__));
150 sc = (struct g_shsec_softc *)cp->private;
151 KASSERT(sc != NULL, ("NULL sc in %s.", __func__));
152 no = cp->index;
153
154 G_SHSEC_DEBUG(0, "Disk %s removed from %s.", cp->provider->name,
155 sc->sc_name);
156
157 sc->sc_disks[no] = NULL;
158 if (sc->sc_provider != NULL) {
159 g_orphan_provider(sc->sc_provider, ENXIO);
160 sc->sc_provider = NULL;
161 G_SHSEC_DEBUG(0, "Device %s removed.", sc->sc_name);
162 }
163
164 if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0)
165 g_access(cp, -cp->acr, -cp->acw, -cp->ace);
166 g_detach(cp);
167 g_destroy_consumer(cp);
168 }
169
170 static void
171 g_shsec_orphan(struct g_consumer *cp)
172 {
173 struct g_shsec_softc *sc;
174 struct g_geom *gp;
175
176 g_topology_assert();
177 gp = cp->geom;
178 sc = gp->softc;
179 if (sc == NULL)
180 return;
181
182 g_shsec_remove_disk(cp);
183 /* If there are no valid disks anymore, remove device. */
184 if (g_shsec_nvalid(sc) == 0)
185 g_shsec_destroy(sc, 1);
186 }
187
188 static int
189 g_shsec_access(struct g_provider *pp, int dr, int dw, int de)
190 {
191 struct g_consumer *cp1, *cp2;
192 struct g_shsec_softc *sc;
193 struct g_geom *gp;
194 int error;
195
196 gp = pp->geom;
197 sc = gp->softc;
198
199 if (sc == NULL) {
200 /*
201 * It looks like geom is being withered.
202 * In that case we allow only negative requests.
203 */
204 KASSERT(dr <= 0 && dw <= 0 && de <= 0,
205 ("Positive access request (device=%s).", pp->name));
206 if ((pp->acr + dr) == 0 && (pp->acw + dw) == 0 &&
207 (pp->ace + de) == 0) {
208 G_SHSEC_DEBUG(0, "Device %s definitely destroyed.",
209 gp->name);
210 }
211 return (0);
212 }
213
214 /* On first open, grab an extra "exclusive" bit */
215 if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0)
216 de++;
217 /* ... and let go of it on last close */
218 if ((pp->acr + dr) == 0 && (pp->acw + dw) == 0 && (pp->ace + de) == 0)
219 de--;
220
221 error = ENXIO;
222 LIST_FOREACH(cp1, &gp->consumer, consumer) {
223 error = g_access(cp1, dr, dw, de);
224 if (error == 0)
225 continue;
226 /*
227 * If we fail here, backout all previous changes.
228 */
229 LIST_FOREACH(cp2, &gp->consumer, consumer) {
230 if (cp1 == cp2)
231 return (error);
232 g_access(cp2, -dr, -dw, -de);
233 }
234 /* NOTREACHED */
235 }
236
237 return (error);
238 }
239
240 static void
241 g_shsec_xor1(uint32_t *src, uint32_t *dst, ssize_t len)
242 {
243
244 for (; len > 0; len -= sizeof(uint32_t), dst++)
245 *dst = *dst ^ *src++;
246 KASSERT(len == 0, ("len != 0 (len=%zd)", len));
247 }
248
249 static void
250 g_shsec_done(struct bio *bp)
251 {
252 struct g_shsec_softc *sc;
253 struct bio *pbp;
254
255 pbp = bp->bio_parent;
256 sc = pbp->bio_to->geom->softc;
257 if (bp->bio_error == 0)
258 G_SHSEC_LOGREQ(2, bp, "Request done.");
259 else {
260 G_SHSEC_LOGREQ(0, bp, "Request failed (error=%d).",
261 bp->bio_error);
262 if (pbp->bio_error == 0)
263 pbp->bio_error = bp->bio_error;
264 }
265 if (pbp->bio_cmd == BIO_READ) {
266 if ((pbp->bio_pflags & G_SHSEC_BFLAG_FIRST) != 0) {
267 bcopy(bp->bio_data, pbp->bio_data, pbp->bio_length);
268 pbp->bio_pflags = 0;
269 } else {
270 g_shsec_xor1((uint32_t *)bp->bio_data,
271 (uint32_t *)pbp->bio_data,
272 (ssize_t)pbp->bio_length);
273 }
274 }
275 bzero(bp->bio_data, bp->bio_length);
276 uma_zfree(g_shsec_zone, bp->bio_data);
277 g_destroy_bio(bp);
278 pbp->bio_inbed++;
279 if (pbp->bio_children == pbp->bio_inbed) {
280 pbp->bio_completed = pbp->bio_length;
281 g_io_deliver(pbp, pbp->bio_error);
282 }
283 }
284
285 static void
286 g_shsec_xor2(uint32_t *rand, uint32_t *dst, ssize_t len)
287 {
288
289 for (; len > 0; len -= sizeof(uint32_t), dst++) {
290 *rand = arc4random();
291 *dst = *dst ^ *rand++;
292 }
293 KASSERT(len == 0, ("len != 0 (len=%zd)", len));
294 }
295
296 static void
297 g_shsec_start(struct bio *bp)
298 {
299 TAILQ_HEAD(, bio) queue = TAILQ_HEAD_INITIALIZER(queue);
300 struct g_shsec_softc *sc;
301 struct bio *cbp;
302 uint32_t *dst;
303 ssize_t len;
304 u_int no;
305 int error;
306
307 sc = bp->bio_to->geom->softc;
308 /*
309 * If sc == NULL, provider's error should be set and g_shsec_start()
310 * should not be called at all.
311 */
312 KASSERT(sc != NULL,
313 ("Provider's error should be set (error=%d)(device=%s).",
314 bp->bio_to->error, bp->bio_to->name));
315
316 G_SHSEC_LOGREQ(2, bp, "Request received.");
317
318 switch (bp->bio_cmd) {
319 case BIO_READ:
320 case BIO_WRITE:
321 case BIO_FLUSH:
322 /*
323 * Only those requests are supported.
324 */
325 break;
326 case BIO_DELETE:
327 case BIO_GETATTR:
328 /* To which provider it should be delivered? */
329 default:
330 g_io_deliver(bp, EOPNOTSUPP);
331 return;
332 }
333
334 /*
335 * Allocate all bios first and calculate XOR.
336 */
337 dst = NULL;
338 len = bp->bio_length;
339 if (bp->bio_cmd == BIO_READ)
340 bp->bio_pflags = G_SHSEC_BFLAG_FIRST;
341 for (no = 0; no < sc->sc_ndisks; no++) {
342 cbp = g_clone_bio(bp);
343 if (cbp == NULL) {
344 error = ENOMEM;
345 goto failure;
346 }
347 TAILQ_INSERT_TAIL(&queue, cbp, bio_queue);
348
349 /*
350 * Fill in the component buf structure.
351 */
352 cbp->bio_done = g_shsec_done;
353 cbp->bio_data = uma_zalloc(g_shsec_zone, M_NOWAIT);
354 if (cbp->bio_data == NULL) {
355 g_shsec_alloc_failed++;
356 error = ENOMEM;
357 goto failure;
358 }
359 cbp->bio_caller2 = sc->sc_disks[no];
360 if (bp->bio_cmd == BIO_WRITE) {
361 if (no == 0) {
362 dst = (uint32_t *)cbp->bio_data;
363 bcopy(bp->bio_data, dst, len);
364 } else {
365 g_shsec_xor2((uint32_t *)cbp->bio_data, dst,
366 len);
367 }
368 }
369 }
370 /*
371 * Fire off all allocated requests!
372 */
373 while ((cbp = TAILQ_FIRST(&queue)) != NULL) {
374 struct g_consumer *cp;
375
376 TAILQ_REMOVE(&queue, cbp, bio_queue);
377 cp = cbp->bio_caller2;
378 cbp->bio_caller2 = NULL;
379 cbp->bio_to = cp->provider;
380 G_SHSEC_LOGREQ(2, cbp, "Sending request.");
381 g_io_request(cbp, cp);
382 }
383 return;
384 failure:
385 while ((cbp = TAILQ_FIRST(&queue)) != NULL) {
386 TAILQ_REMOVE(&queue, cbp, bio_queue);
387 bp->bio_children--;
388 if (cbp->bio_data != NULL) {
389 bzero(cbp->bio_data, cbp->bio_length);
390 uma_zfree(g_shsec_zone, cbp->bio_data);
391 }
392 g_destroy_bio(cbp);
393 }
394 if (bp->bio_error == 0)
395 bp->bio_error = error;
396 g_io_deliver(bp, bp->bio_error);
397 }
398
399 static void
400 g_shsec_check_and_run(struct g_shsec_softc *sc)
401 {
402 off_t mediasize, ms;
403 u_int no, sectorsize = 0;
404
405 if (g_shsec_nvalid(sc) != sc->sc_ndisks)
406 return;
407
408 sc->sc_provider = g_new_providerf(sc->sc_geom, "shsec/%s", sc->sc_name);
409 /*
410 * Find the smallest disk.
411 */
412 mediasize = sc->sc_disks[0]->provider->mediasize;
413 mediasize -= sc->sc_disks[0]->provider->sectorsize;
414 sectorsize = sc->sc_disks[0]->provider->sectorsize;
415 for (no = 1; no < sc->sc_ndisks; no++) {
416 ms = sc->sc_disks[no]->provider->mediasize;
417 ms -= sc->sc_disks[no]->provider->sectorsize;
418 if (ms < mediasize)
419 mediasize = ms;
420 sectorsize = lcm(sectorsize,
421 sc->sc_disks[no]->provider->sectorsize);
422 }
423 sc->sc_provider->sectorsize = sectorsize;
424 sc->sc_provider->mediasize = mediasize;
425 g_error_provider(sc->sc_provider, 0);
426
427 G_SHSEC_DEBUG(0, "Device %s activated.", sc->sc_name);
428 }
429
430 static int
431 g_shsec_read_metadata(struct g_consumer *cp, struct g_shsec_metadata *md)
432 {
433 struct g_provider *pp;
434 u_char *buf;
435 int error;
436
437 g_topology_assert();
438
439 error = g_access(cp, 1, 0, 0);
440 if (error != 0)
441 return (error);
442 pp = cp->provider;
443 g_topology_unlock();
444 buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize,
445 &error);
446 g_topology_lock();
447 g_access(cp, -1, 0, 0);
448 if (buf == NULL)
449 return (error);
450
451 /* Decode metadata. */
452 shsec_metadata_decode(buf, md);
453 g_free(buf);
454
455 return (0);
456 }
457
458 /*
459 * Add disk to given device.
460 */
461 static int
462 g_shsec_add_disk(struct g_shsec_softc *sc, struct g_provider *pp, u_int no)
463 {
464 struct g_consumer *cp, *fcp;
465 struct g_geom *gp;
466 struct g_shsec_metadata md;
467 int error;
468
469 /* Metadata corrupted? */
470 if (no >= sc->sc_ndisks)
471 return (EINVAL);
472
473 /* Check if disk is not already attached. */
474 if (sc->sc_disks[no] != NULL)
475 return (EEXIST);
476
477 gp = sc->sc_geom;
478 fcp = LIST_FIRST(&gp->consumer);
479
480 cp = g_new_consumer(gp);
481 error = g_attach(cp, pp);
482 if (error != 0) {
483 g_destroy_consumer(cp);
484 return (error);
485 }
486
487 if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0)) {
488 error = g_access(cp, fcp->acr, fcp->acw, fcp->ace);
489 if (error != 0) {
490 g_detach(cp);
491 g_destroy_consumer(cp);
492 return (error);
493 }
494 }
495
496 /* Reread metadata. */
497 error = g_shsec_read_metadata(cp, &md);
498 if (error != 0)
499 goto fail;
500
501 if (strcmp(md.md_magic, G_SHSEC_MAGIC) != 0 ||
502 strcmp(md.md_name, sc->sc_name) != 0 || md.md_id != sc->sc_id) {
503 G_SHSEC_DEBUG(0, "Metadata on %s changed.", pp->name);
504 goto fail;
505 }
506
507 cp->private = sc;
508 cp->index = no;
509 sc->sc_disks[no] = cp;
510
511 G_SHSEC_DEBUG(0, "Disk %s attached to %s.", pp->name, sc->sc_name);
512
513 g_shsec_check_and_run(sc);
514
515 return (0);
516 fail:
517 if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0))
518 g_access(cp, -fcp->acr, -fcp->acw, -fcp->ace);
519 g_detach(cp);
520 g_destroy_consumer(cp);
521 return (error);
522 }
523
524 static struct g_geom *
525 g_shsec_create(struct g_class *mp, const struct g_shsec_metadata *md)
526 {
527 struct g_shsec_softc *sc;
528 struct g_geom *gp;
529 u_int no;
530
531 G_SHSEC_DEBUG(1, "Creating device %s (id=%u).", md->md_name, md->md_id);
532
533 /* Two disks is minimum. */
534 if (md->md_all < 2) {
535 G_SHSEC_DEBUG(0, "Too few disks defined for %s.", md->md_name);
536 return (NULL);
537 }
538
539 /* Check for duplicate unit */
540 LIST_FOREACH(gp, &mp->geom, geom) {
541 sc = gp->softc;
542 if (sc != NULL && strcmp(sc->sc_name, md->md_name) == 0) {
543 G_SHSEC_DEBUG(0, "Device %s already configured.",
544 sc->sc_name);
545 return (NULL);
546 }
547 }
548 gp = g_new_geomf(mp, "%s", md->md_name);
549 sc = malloc(sizeof(*sc), M_SHSEC, M_WAITOK | M_ZERO);
550 gp->start = g_shsec_start;
551 gp->spoiled = g_shsec_orphan;
552 gp->orphan = g_shsec_orphan;
553 gp->access = g_shsec_access;
554 gp->dumpconf = g_shsec_dumpconf;
555
556 sc->sc_id = md->md_id;
557 sc->sc_ndisks = md->md_all;
558 sc->sc_disks = malloc(sizeof(struct g_consumer *) * sc->sc_ndisks,
559 M_SHSEC, M_WAITOK | M_ZERO);
560 for (no = 0; no < sc->sc_ndisks; no++)
561 sc->sc_disks[no] = NULL;
562
563 gp->softc = sc;
564 sc->sc_geom = gp;
565 sc->sc_provider = NULL;
566
567 G_SHSEC_DEBUG(0, "Device %s created (id=%u).", sc->sc_name, sc->sc_id);
568
569 return (gp);
570 }
571
572 static int
573 g_shsec_destroy(struct g_shsec_softc *sc, boolean_t force)
574 {
575 struct g_provider *pp;
576 struct g_geom *gp;
577 u_int no;
578
579 g_topology_assert();
580
581 if (sc == NULL)
582 return (ENXIO);
583
584 pp = sc->sc_provider;
585 if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) {
586 if (force) {
587 G_SHSEC_DEBUG(0, "Device %s is still open, so it "
588 "can't be definitely removed.", pp->name);
589 } else {
590 G_SHSEC_DEBUG(1,
591 "Device %s is still open (r%dw%de%d).", pp->name,
592 pp->acr, pp->acw, pp->ace);
593 return (EBUSY);
594 }
595 }
596
597 for (no = 0; no < sc->sc_ndisks; no++) {
598 if (sc->sc_disks[no] != NULL)
599 g_shsec_remove_disk(sc->sc_disks[no]);
600 }
601
602 gp = sc->sc_geom;
603 gp->softc = NULL;
604 KASSERT(sc->sc_provider == NULL, ("Provider still exists? (device=%s)",
605 gp->name));
606 free(sc->sc_disks, M_SHSEC);
607 free(sc, M_SHSEC);
608
609 pp = LIST_FIRST(&gp->provider);
610 if (pp == NULL || (pp->acr == 0 && pp->acw == 0 && pp->ace == 0))
611 G_SHSEC_DEBUG(0, "Device %s destroyed.", gp->name);
612
613 g_wither_geom(gp, ENXIO);
614
615 return (0);
616 }
617
618 static int
619 g_shsec_destroy_geom(struct gctl_req *req __unused, struct g_class *mp __unused,
620 struct g_geom *gp)
621 {
622 struct g_shsec_softc *sc;
623
624 sc = gp->softc;
625 return (g_shsec_destroy(sc, 0));
626 }
627
628 static struct g_geom *
629 g_shsec_taste(struct g_class *mp, struct g_provider *pp, int flags __unused)
630 {
631 struct g_shsec_metadata md;
632 struct g_shsec_softc *sc;
633 struct g_consumer *cp;
634 struct g_geom *gp;
635 int error;
636
637 g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name);
638 g_topology_assert();
639
640 /* Skip providers that are already open for writing. */
641 if (pp->acw > 0)
642 return (NULL);
643
644 G_SHSEC_DEBUG(3, "Tasting %s.", pp->name);
645
646 gp = g_new_geomf(mp, "shsec:taste");
647 gp->start = g_shsec_start;
648 gp->access = g_shsec_access;
649 gp->orphan = g_shsec_orphan;
650 cp = g_new_consumer(gp);
651 g_attach(cp, pp);
652 error = g_shsec_read_metadata(cp, &md);
653 g_detach(cp);
654 g_destroy_consumer(cp);
655 g_destroy_geom(gp);
656 if (error != 0)
657 return (NULL);
658 gp = NULL;
659
660 if (strcmp(md.md_magic, G_SHSEC_MAGIC) != 0)
661 return (NULL);
662 if (md.md_version > G_SHSEC_VERSION) {
663 G_SHSEC_DEBUG(0, "Kernel module is too old to handle %s.\n",
664 pp->name);
665 return (NULL);
666 }
667 /*
668 * Backward compatibility:
669 */
670 /* There was no md_provsize field in earlier versions of metadata. */
671 if (md.md_version < 1)
672 md.md_provsize = pp->mediasize;
673
674 if (md.md_provider[0] != '\0' &&
675 !g_compare_names(md.md_provider, pp->name))
676 return (NULL);
677 if (md.md_provsize != pp->mediasize)
678 return (NULL);
679
680 /*
681 * Let's check if device already exists.
682 */
683 sc = NULL;
684 LIST_FOREACH(gp, &mp->geom, geom) {
685 sc = gp->softc;
686 if (sc == NULL)
687 continue;
688 if (strcmp(md.md_name, sc->sc_name) != 0)
689 continue;
690 if (md.md_id != sc->sc_id)
691 continue;
692 break;
693 }
694 if (gp != NULL) {
695 G_SHSEC_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name);
696 error = g_shsec_add_disk(sc, pp, md.md_no);
697 if (error != 0) {
698 G_SHSEC_DEBUG(0, "Cannot add disk %s to %s (error=%d).",
699 pp->name, gp->name, error);
700 return (NULL);
701 }
702 } else {
703 gp = g_shsec_create(mp, &md);
704 if (gp == NULL) {
705 G_SHSEC_DEBUG(0, "Cannot create device %s.", md.md_name);
706 return (NULL);
707 }
708 sc = gp->softc;
709 G_SHSEC_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name);
710 error = g_shsec_add_disk(sc, pp, md.md_no);
711 if (error != 0) {
712 G_SHSEC_DEBUG(0, "Cannot add disk %s to %s (error=%d).",
713 pp->name, gp->name, error);
714 g_shsec_destroy(sc, 1);
715 return (NULL);
716 }
717 }
718 return (gp);
719 }
720
721 static struct g_shsec_softc *
722 g_shsec_find_device(struct g_class *mp, const char *name)
723 {
724 struct g_shsec_softc *sc;
725 struct g_geom *gp;
726
727 LIST_FOREACH(gp, &mp->geom, geom) {
728 sc = gp->softc;
729 if (sc == NULL)
730 continue;
731 if (strcmp(sc->sc_name, name) == 0)
732 return (sc);
733 }
734 return (NULL);
735 }
736
737 static void
738 g_shsec_ctl_destroy(struct gctl_req *req, struct g_class *mp)
739 {
740 struct g_shsec_softc *sc;
741 int *force, *nargs, error;
742 const char *name;
743 char param[16];
744 u_int i;
745
746 g_topology_assert();
747
748 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
749 if (nargs == NULL) {
750 gctl_error(req, "No '%s' argument.", "nargs");
751 return;
752 }
753 if (*nargs <= 0) {
754 gctl_error(req, "Missing device(s).");
755 return;
756 }
757 force = gctl_get_paraml(req, "force", sizeof(*force));
758 if (force == NULL) {
759 gctl_error(req, "No '%s' argument.", "force");
760 return;
761 }
762
763 for (i = 0; i < (u_int)*nargs; i++) {
764 snprintf(param, sizeof(param), "arg%u", i);
765 name = gctl_get_asciiparam(req, param);
766 if (name == NULL) {
767 gctl_error(req, "No 'arg%u' argument.", i);
768 return;
769 }
770 sc = g_shsec_find_device(mp, name);
771 if (sc == NULL) {
772 gctl_error(req, "No such device: %s.", name);
773 return;
774 }
775 error = g_shsec_destroy(sc, *force);
776 if (error != 0) {
777 gctl_error(req, "Cannot destroy device %s (error=%d).",
778 sc->sc_name, error);
779 return;
780 }
781 }
782 }
783
784 static void
785 g_shsec_config(struct gctl_req *req, struct g_class *mp, const char *verb)
786 {
787 uint32_t *version;
788
789 g_topology_assert();
790
791 version = gctl_get_paraml(req, "version", sizeof(*version));
792 if (version == NULL) {
793 gctl_error(req, "No '%s' argument.", "version");
794 return;
795 }
796 if (*version != G_SHSEC_VERSION) {
797 gctl_error(req, "Userland and kernel parts are out of sync.");
798 return;
799 }
800
801 if (strcmp(verb, "stop") == 0) {
802 g_shsec_ctl_destroy(req, mp);
803 return;
804 }
805
806 gctl_error(req, "Unknown verb.");
807 }
808
809 static void
810 g_shsec_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp,
811 struct g_consumer *cp, struct g_provider *pp)
812 {
813 struct g_shsec_softc *sc;
814
815 sc = gp->softc;
816 if (sc == NULL)
817 return;
818 if (pp != NULL) {
819 /* Nothing here. */
820 } else if (cp != NULL) {
821 sbuf_printf(sb, "%s<Number>%u</Number>\n", indent,
822 (u_int)cp->index);
823 } else {
824 sbuf_printf(sb, "%s<ID>%u</ID>\n", indent, (u_int)sc->sc_id);
825 sbuf_printf(sb, "%s<Status>Total=%u, Online=%u</Status>\n",
826 indent, sc->sc_ndisks, g_shsec_nvalid(sc));
827 sbuf_printf(sb, "%s<State>", indent);
828 if (sc->sc_provider != NULL && sc->sc_provider->error == 0)
829 sbuf_printf(sb, "UP");
830 else
831 sbuf_printf(sb, "DOWN");
832 sbuf_printf(sb, "</State>\n");
833 }
834 }
835
836 DECLARE_GEOM_CLASS(g_shsec_class, g_shsec);
Cache object: d454e5e623f80bbb3e274a105fb71d6a
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