1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2004-2005 Pawel Jakub Dawidek <pjd@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/kernel.h> 35 #include <sys/module.h> 36 #include <sys/lock.h> 37 #include <sys/mutex.h> 38 #include <sys/bio.h> 39 #include <sys/sbuf.h> 40 #include <sys/sysctl.h> 41 #include <sys/malloc.h> 42 #include <geom/geom.h> 43 #include <geom/concat/g_concat.h> 44 45 FEATURE(geom_concat, "GEOM concatenation support"); 46 47 static MALLOC_DEFINE(M_CONCAT, "concat_data", "GEOM_CONCAT Data"); 48 49 SYSCTL_DECL(_kern_geom); 50 static SYSCTL_NODE(_kern_geom, OID_AUTO, concat, CTLFLAG_RW, 0, 51 "GEOM_CONCAT stuff"); 52 static u_int g_concat_debug = 0; 53 SYSCTL_UINT(_kern_geom_concat, OID_AUTO, debug, CTLFLAG_RWTUN, &g_concat_debug, 0, 54 "Debug level"); 55 56 static int g_concat_destroy(struct g_concat_softc *sc, boolean_t force); 57 static int g_concat_destroy_geom(struct gctl_req *req, struct g_class *mp, 58 struct g_geom *gp); 59 60 static g_taste_t g_concat_taste; 61 static g_ctl_req_t g_concat_config; 62 static g_dumpconf_t g_concat_dumpconf; 63 64 struct g_class g_concat_class = { 65 .name = G_CONCAT_CLASS_NAME, 66 .version = G_VERSION, 67 .ctlreq = g_concat_config, 68 .taste = g_concat_taste, 69 .destroy_geom = g_concat_destroy_geom 70 }; 71 72 73 /* 74 * Greatest Common Divisor. 75 */ 76 static u_int 77 gcd(u_int a, u_int b) 78 { 79 u_int c; 80 81 while (b != 0) { 82 c = a; 83 a = b; 84 b = (c % b); 85 } 86 return (a); 87 } 88 89 /* 90 * Least Common Multiple. 91 */ 92 static u_int 93 lcm(u_int a, u_int b) 94 { 95 96 return ((a * b) / gcd(a, b)); 97 } 98 99 /* 100 * Return the number of valid disks. 101 */ 102 static u_int 103 g_concat_nvalid(struct g_concat_softc *sc) 104 { 105 u_int i, no; 106 107 no = 0; 108 for (i = 0; i < sc->sc_ndisks; i++) { 109 if (sc->sc_disks[i].d_consumer != NULL) 110 no++; 111 } 112 113 return (no); 114 } 115 116 static void 117 g_concat_remove_disk(struct g_concat_disk *disk) 118 { 119 struct g_consumer *cp; 120 struct g_concat_softc *sc; 121 122 g_topology_assert(); 123 KASSERT(disk->d_consumer != NULL, ("Non-valid disk in %s.", __func__)); 124 sc = disk->d_softc; 125 cp = disk->d_consumer; 126 127 if (!disk->d_removed) { 128 G_CONCAT_DEBUG(0, "Disk %s removed from %s.", 129 cp->provider->name, sc->sc_name); 130 disk->d_removed = 1; 131 } 132 133 if (sc->sc_provider != NULL) { 134 G_CONCAT_DEBUG(0, "Device %s deactivated.", 135 sc->sc_provider->name); 136 g_wither_provider(sc->sc_provider, ENXIO); 137 sc->sc_provider = NULL; 138 } 139 140 if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0) 141 return; 142 disk->d_consumer = NULL; 143 g_detach(cp); 144 g_destroy_consumer(cp); 145 /* If there are no valid disks anymore, remove device. */ 146 if (LIST_EMPTY(&sc->sc_geom->consumer)) 147 g_concat_destroy(sc, 1); 148 } 149 150 static void 151 g_concat_orphan(struct g_consumer *cp) 152 { 153 struct g_concat_softc *sc; 154 struct g_concat_disk *disk; 155 struct g_geom *gp; 156 157 g_topology_assert(); 158 gp = cp->geom; 159 sc = gp->softc; 160 if (sc == NULL) 161 return; 162 163 disk = cp->private; 164 if (disk == NULL) /* Possible? */ 165 return; 166 g_concat_remove_disk(disk); 167 } 168 169 static int 170 g_concat_access(struct g_provider *pp, int dr, int dw, int de) 171 { 172 struct g_consumer *cp1, *cp2, *tmp; 173 struct g_concat_disk *disk; 174 struct g_geom *gp; 175 int error; 176 177 g_topology_assert(); 178 gp = pp->geom; 179 180 /* On first open, grab an extra "exclusive" bit */ 181 if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0) 182 de++; 183 /* ... and let go of it on last close */ 184 if ((pp->acr + dr) == 0 && (pp->acw + dw) == 0 && (pp->ace + de) == 0) 185 de--; 186 187 LIST_FOREACH_SAFE(cp1, &gp->consumer, consumer, tmp) { 188 error = g_access(cp1, dr, dw, de); 189 if (error != 0) 190 goto fail; 191 disk = cp1->private; 192 if (cp1->acr == 0 && cp1->acw == 0 && cp1->ace == 0 && 193 disk->d_removed) { 194 g_concat_remove_disk(disk); /* May destroy geom. */ 195 } 196 } 197 return (0); 198 199 fail: 200 LIST_FOREACH(cp2, &gp->consumer, consumer) { 201 if (cp1 == cp2) 202 break; 203 g_access(cp2, -dr, -dw, -de); 204 } 205 return (error); 206 } 207 208 static void 209 g_concat_candelete(struct bio *bp) 210 { 211 struct g_concat_softc *sc; 212 struct g_concat_disk *disk; 213 int i, val; 214 215 sc = bp->bio_to->geom->softc; 216 for (i = 0; i < sc->sc_ndisks; i++) { 217 disk = &sc->sc_disks[i]; 218 if (!disk->d_removed && disk->d_candelete) 219 break; 220 } 221 val = i < sc->sc_ndisks; 222 g_handleattr(bp, "GEOM::candelete", &val, sizeof(val)); 223 } 224 225 static void 226 g_concat_kernel_dump(struct bio *bp) 227 { 228 struct g_concat_softc *sc; 229 struct g_concat_disk *disk; 230 struct bio *cbp; 231 struct g_kerneldump *gkd; 232 u_int i; 233 234 sc = bp->bio_to->geom->softc; 235 gkd = (struct g_kerneldump *)bp->bio_data; 236 for (i = 0; i < sc->sc_ndisks; i++) { 237 if (sc->sc_disks[i].d_start <= gkd->offset && 238 sc->sc_disks[i].d_end > gkd->offset) 239 break; 240 } 241 if (i == sc->sc_ndisks) { 242 g_io_deliver(bp, EOPNOTSUPP); 243 return; 244 } 245 disk = &sc->sc_disks[i]; 246 gkd->offset -= disk->d_start; 247 if (gkd->length > disk->d_end - disk->d_start - gkd->offset) 248 gkd->length = disk->d_end - disk->d_start - gkd->offset; 249 cbp = g_clone_bio(bp); 250 if (cbp == NULL) { 251 g_io_deliver(bp, ENOMEM); 252 return; 253 } 254 cbp->bio_done = g_std_done; 255 g_io_request(cbp, disk->d_consumer); 256 G_CONCAT_DEBUG(1, "Kernel dump will go to %s.", 257 disk->d_consumer->provider->name); 258 } 259 260 static void 261 g_concat_done(struct bio *bp) 262 { 263 struct g_concat_softc *sc; 264 struct bio *pbp; 265 266 pbp = bp->bio_parent; 267 sc = pbp->bio_to->geom->softc; 268 mtx_lock(&sc->sc_lock); 269 if (pbp->bio_error == 0) 270 pbp->bio_error = bp->bio_error; 271 pbp->bio_completed += bp->bio_completed; 272 pbp->bio_inbed++; 273 if (pbp->bio_children == pbp->bio_inbed) { 274 mtx_unlock(&sc->sc_lock); 275 g_io_deliver(pbp, pbp->bio_error); 276 } else 277 mtx_unlock(&sc->sc_lock); 278 g_destroy_bio(bp); 279 } 280 281 static void 282 g_concat_flush(struct g_concat_softc *sc, struct bio *bp) 283 { 284 struct bio_queue_head queue; 285 struct g_consumer *cp; 286 struct bio *cbp; 287 u_int no; 288 289 bioq_init(&queue); 290 for (no = 0; no < sc->sc_ndisks; no++) { 291 cbp = g_clone_bio(bp); 292 if (cbp == NULL) { 293 while ((cbp = bioq_takefirst(&queue)) != NULL) 294 g_destroy_bio(cbp); 295 if (bp->bio_error == 0) 296 bp->bio_error = ENOMEM; 297 g_io_deliver(bp, bp->bio_error); 298 return; 299 } 300 bioq_insert_tail(&queue, cbp); 301 cbp->bio_done = g_concat_done; 302 cbp->bio_caller1 = sc->sc_disks[no].d_consumer; 303 cbp->bio_to = sc->sc_disks[no].d_consumer->provider; 304 } 305 while ((cbp = bioq_takefirst(&queue)) != NULL) { 306 G_CONCAT_LOGREQ(cbp, "Sending request."); 307 cp = cbp->bio_caller1; 308 cbp->bio_caller1 = NULL; 309 g_io_request(cbp, cp); 310 } 311 } 312 313 static void 314 g_concat_start(struct bio *bp) 315 { 316 struct bio_queue_head queue; 317 struct g_concat_softc *sc; 318 struct g_concat_disk *disk; 319 struct g_provider *pp; 320 off_t offset, end, length, off, len; 321 struct bio *cbp; 322 char *addr; 323 u_int no; 324 325 pp = bp->bio_to; 326 sc = pp->geom->softc; 327 /* 328 * If sc == NULL, provider's error should be set and g_concat_start() 329 * should not be called at all. 330 */ 331 KASSERT(sc != NULL, 332 ("Provider's error should be set (error=%d)(device=%s).", 333 bp->bio_to->error, bp->bio_to->name)); 334 335 G_CONCAT_LOGREQ(bp, "Request received."); 336 337 switch (bp->bio_cmd) { 338 case BIO_READ: 339 case BIO_WRITE: 340 case BIO_DELETE: 341 break; 342 case BIO_FLUSH: 343 g_concat_flush(sc, bp); 344 return; 345 case BIO_GETATTR: 346 if (strcmp("GEOM::kerneldump", bp->bio_attribute) == 0) { 347 g_concat_kernel_dump(bp); 348 return; 349 } else if (strcmp("GEOM::candelete", bp->bio_attribute) == 0) { 350 g_concat_candelete(bp); 351 return; 352 } 353 /* To which provider it should be delivered? */ 354 /* FALLTHROUGH */ 355 default: 356 g_io_deliver(bp, EOPNOTSUPP); 357 return; 358 } 359 360 offset = bp->bio_offset; 361 length = bp->bio_length; 362 if ((bp->bio_flags & BIO_UNMAPPED) != 0) 363 addr = NULL; 364 else 365 addr = bp->bio_data; 366 end = offset + length; 367 368 bioq_init(&queue); 369 for (no = 0; no < sc->sc_ndisks; no++) { 370 disk = &sc->sc_disks[no]; 371 if (disk->d_end <= offset) 372 continue; 373 if (disk->d_start >= end) 374 break; 375 376 off = offset - disk->d_start; 377 len = MIN(length, disk->d_end - offset); 378 length -= len; 379 offset += len; 380 381 cbp = g_clone_bio(bp); 382 if (cbp == NULL) { 383 while ((cbp = bioq_takefirst(&queue)) != NULL) 384 g_destroy_bio(cbp); 385 if (bp->bio_error == 0) 386 bp->bio_error = ENOMEM; 387 g_io_deliver(bp, bp->bio_error); 388 return; 389 } 390 bioq_insert_tail(&queue, cbp); 391 /* 392 * Fill in the component buf structure. 393 */ 394 if (len == bp->bio_length) 395 cbp->bio_done = g_std_done; 396 else 397 cbp->bio_done = g_concat_done; 398 cbp->bio_offset = off; 399 cbp->bio_length = len; 400 if ((bp->bio_flags & BIO_UNMAPPED) != 0) { 401 cbp->bio_ma_offset += (uintptr_t)addr; 402 cbp->bio_ma += cbp->bio_ma_offset / PAGE_SIZE; 403 cbp->bio_ma_offset %= PAGE_SIZE; 404 cbp->bio_ma_n = round_page(cbp->bio_ma_offset + 405 cbp->bio_length) / PAGE_SIZE; 406 } else 407 cbp->bio_data = addr; 408 addr += len; 409 cbp->bio_to = disk->d_consumer->provider; 410 cbp->bio_caller1 = disk; 411 412 if (length == 0) 413 break; 414 } 415 KASSERT(length == 0, 416 ("Length is still greater than 0 (class=%s, name=%s).", 417 bp->bio_to->geom->class->name, bp->bio_to->geom->name)); 418 while ((cbp = bioq_takefirst(&queue)) != NULL) { 419 G_CONCAT_LOGREQ(cbp, "Sending request."); 420 disk = cbp->bio_caller1; 421 cbp->bio_caller1 = NULL; 422 g_io_request(cbp, disk->d_consumer); 423 } 424 } 425 426 static void 427 g_concat_check_and_run(struct g_concat_softc *sc) 428 { 429 struct g_concat_disk *disk; 430 struct g_provider *dp, *pp; 431 u_int no, sectorsize = 0; 432 off_t start; 433 int error; 434 435 g_topology_assert(); 436 if (g_concat_nvalid(sc) != sc->sc_ndisks) 437 return; 438 439 pp = g_new_providerf(sc->sc_geom, "concat/%s", sc->sc_name); 440 pp->flags |= G_PF_DIRECT_SEND | G_PF_DIRECT_RECEIVE | 441 G_PF_ACCEPT_UNMAPPED; 442 start = 0; 443 for (no = 0; no < sc->sc_ndisks; no++) { 444 disk = &sc->sc_disks[no]; 445 dp = disk->d_consumer->provider; 446 disk->d_start = start; 447 disk->d_end = disk->d_start + dp->mediasize; 448 if (sc->sc_type == G_CONCAT_TYPE_AUTOMATIC) 449 disk->d_end -= dp->sectorsize; 450 start = disk->d_end; 451 error = g_access(disk->d_consumer, 1, 0, 0); 452 if (error == 0) { 453 error = g_getattr("GEOM::candelete", disk->d_consumer, 454 &disk->d_candelete); 455 if (error != 0) 456 disk->d_candelete = 0; 457 (void)g_access(disk->d_consumer, -1, 0, 0); 458 } else 459 G_CONCAT_DEBUG(1, "Failed to access disk %s, error %d.", 460 dp->name, error); 461 if (no == 0) 462 sectorsize = dp->sectorsize; 463 else 464 sectorsize = lcm(sectorsize, dp->sectorsize); 465 466 /* A provider underneath us doesn't support unmapped */ 467 if ((dp->flags & G_PF_ACCEPT_UNMAPPED) == 0) { 468 G_CONCAT_DEBUG(1, "Cancelling unmapped " 469 "because of %s.", dp->name); 470 pp->flags &= ~G_PF_ACCEPT_UNMAPPED; 471 } 472 } 473 pp->sectorsize = sectorsize; 474 /* We have sc->sc_disks[sc->sc_ndisks - 1].d_end in 'start'. */ 475 pp->mediasize = start; 476 pp->stripesize = sc->sc_disks[0].d_consumer->provider->stripesize; 477 pp->stripeoffset = sc->sc_disks[0].d_consumer->provider->stripeoffset; 478 sc->sc_provider = pp; 479 g_error_provider(pp, 0); 480 481 G_CONCAT_DEBUG(0, "Device %s activated.", sc->sc_provider->name); 482 } 483 484 static int 485 g_concat_read_metadata(struct g_consumer *cp, struct g_concat_metadata *md) 486 { 487 struct g_provider *pp; 488 u_char *buf; 489 int error; 490 491 g_topology_assert(); 492 493 error = g_access(cp, 1, 0, 0); 494 if (error != 0) 495 return (error); 496 pp = cp->provider; 497 g_topology_unlock(); 498 buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize, 499 &error); 500 g_topology_lock(); 501 g_access(cp, -1, 0, 0); 502 if (buf == NULL) 503 return (error); 504 505 /* Decode metadata. */ 506 concat_metadata_decode(buf, md); 507 g_free(buf); 508 509 return (0); 510 } 511 512 /* 513 * Add disk to given device. 514 */ 515 static int 516 g_concat_add_disk(struct g_concat_softc *sc, struct g_provider *pp, u_int no) 517 { 518 struct g_concat_disk *disk; 519 struct g_consumer *cp, *fcp; 520 struct g_geom *gp; 521 int error; 522 523 g_topology_assert(); 524 /* Metadata corrupted? */ 525 if (no >= sc->sc_ndisks) 526 return (EINVAL); 527 528 disk = &sc->sc_disks[no]; 529 /* Check if disk is not already attached. */ 530 if (disk->d_consumer != NULL) 531 return (EEXIST); 532 533 gp = sc->sc_geom; 534 fcp = LIST_FIRST(&gp->consumer); 535 536 cp = g_new_consumer(gp); 537 cp->flags |= G_CF_DIRECT_SEND | G_CF_DIRECT_RECEIVE; 538 error = g_attach(cp, pp); 539 if (error != 0) { 540 g_destroy_consumer(cp); 541 return (error); 542 } 543 544 if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0)) { 545 error = g_access(cp, fcp->acr, fcp->acw, fcp->ace); 546 if (error != 0) { 547 g_detach(cp); 548 g_destroy_consumer(cp); 549 return (error); 550 } 551 } 552 if (sc->sc_type == G_CONCAT_TYPE_AUTOMATIC) { 553 struct g_concat_metadata md; 554 555 /* Re-read metadata. */ 556 error = g_concat_read_metadata(cp, &md); 557 if (error != 0) 558 goto fail; 559 560 if (strcmp(md.md_magic, G_CONCAT_MAGIC) != 0 || 561 strcmp(md.md_name, sc->sc_name) != 0 || 562 md.md_id != sc->sc_id) { 563 G_CONCAT_DEBUG(0, "Metadata on %s changed.", pp->name); 564 goto fail; 565 } 566 } 567 568 cp->private = disk; 569 disk->d_consumer = cp; 570 disk->d_softc = sc; 571 disk->d_start = 0; /* not yet */ 572 disk->d_end = 0; /* not yet */ 573 disk->d_removed = 0; 574 575 G_CONCAT_DEBUG(0, "Disk %s attached to %s.", pp->name, sc->sc_name); 576 577 g_concat_check_and_run(sc); 578 579 return (0); 580 fail: 581 if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0)) 582 g_access(cp, -fcp->acr, -fcp->acw, -fcp->ace); 583 g_detach(cp); 584 g_destroy_consumer(cp); 585 return (error); 586 } 587 588 static struct g_geom * 589 g_concat_create(struct g_class *mp, const struct g_concat_metadata *md, 590 u_int type) 591 { 592 struct g_concat_softc *sc; 593 struct g_geom *gp; 594 u_int no; 595 596 G_CONCAT_DEBUG(1, "Creating device %s (id=%u).", md->md_name, 597 md->md_id); 598 599 /* One disks is minimum. */ 600 if (md->md_all < 1) 601 return (NULL); 602 603 /* Check for duplicate unit */ 604 LIST_FOREACH(gp, &mp->geom, geom) { 605 sc = gp->softc; 606 if (sc != NULL && strcmp(sc->sc_name, md->md_name) == 0) { 607 G_CONCAT_DEBUG(0, "Device %s already configured.", 608 gp->name); 609 return (NULL); 610 } 611 } 612 gp = g_new_geomf(mp, "%s", md->md_name); 613 sc = malloc(sizeof(*sc), M_CONCAT, M_WAITOK | M_ZERO); 614 gp->start = g_concat_start; 615 gp->spoiled = g_concat_orphan; 616 gp->orphan = g_concat_orphan; 617 gp->access = g_concat_access; 618 gp->dumpconf = g_concat_dumpconf; 619 620 sc->sc_id = md->md_id; 621 sc->sc_ndisks = md->md_all; 622 sc->sc_disks = malloc(sizeof(struct g_concat_disk) * sc->sc_ndisks, 623 M_CONCAT, M_WAITOK | M_ZERO); 624 for (no = 0; no < sc->sc_ndisks; no++) 625 sc->sc_disks[no].d_consumer = NULL; 626 sc->sc_type = type; 627 mtx_init(&sc->sc_lock, "gconcat lock", NULL, MTX_DEF); 628 629 gp->softc = sc; 630 sc->sc_geom = gp; 631 sc->sc_provider = NULL; 632 633 G_CONCAT_DEBUG(0, "Device %s created (id=%u).", sc->sc_name, sc->sc_id); 634 635 return (gp); 636 } 637 638 static int 639 g_concat_destroy(struct g_concat_softc *sc, boolean_t force) 640 { 641 struct g_provider *pp; 642 struct g_consumer *cp, *cp1; 643 struct g_geom *gp; 644 645 g_topology_assert(); 646 647 if (sc == NULL) 648 return (ENXIO); 649 650 pp = sc->sc_provider; 651 if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) { 652 if (force) { 653 G_CONCAT_DEBUG(0, "Device %s is still open, so it " 654 "can't be definitely removed.", pp->name); 655 } else { 656 G_CONCAT_DEBUG(1, 657 "Device %s is still open (r%dw%de%d).", pp->name, 658 pp->acr, pp->acw, pp->ace); 659 return (EBUSY); 660 } 661 } 662 663 gp = sc->sc_geom; 664 LIST_FOREACH_SAFE(cp, &gp->consumer, consumer, cp1) { 665 g_concat_remove_disk(cp->private); 666 if (cp1 == NULL) 667 return (0); /* Recursion happened. */ 668 } 669 if (!LIST_EMPTY(&gp->consumer)) 670 return (EINPROGRESS); 671 672 gp->softc = NULL; 673 KASSERT(sc->sc_provider == NULL, ("Provider still exists? (device=%s)", 674 gp->name)); 675 free(sc->sc_disks, M_CONCAT); 676 mtx_destroy(&sc->sc_lock); 677 free(sc, M_CONCAT); 678 679 G_CONCAT_DEBUG(0, "Device %s destroyed.", gp->name); 680 g_wither_geom(gp, ENXIO); 681 return (0); 682 } 683 684 static int 685 g_concat_destroy_geom(struct gctl_req *req __unused, 686 struct g_class *mp __unused, struct g_geom *gp) 687 { 688 struct g_concat_softc *sc; 689 690 sc = gp->softc; 691 return (g_concat_destroy(sc, 0)); 692 } 693 694 static struct g_geom * 695 g_concat_taste(struct g_class *mp, struct g_provider *pp, int flags __unused) 696 { 697 struct g_concat_metadata md; 698 struct g_concat_softc *sc; 699 struct g_consumer *cp; 700 struct g_geom *gp; 701 int error; 702 703 g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name); 704 g_topology_assert(); 705 706 /* Skip providers that are already open for writing. */ 707 if (pp->acw > 0) 708 return (NULL); 709 710 G_CONCAT_DEBUG(3, "Tasting %s.", pp->name); 711 712 gp = g_new_geomf(mp, "concat:taste"); 713 gp->start = g_concat_start; 714 gp->access = g_concat_access; 715 gp->orphan = g_concat_orphan; 716 cp = g_new_consumer(gp); 717 g_attach(cp, pp); 718 error = g_concat_read_metadata(cp, &md); 719 g_detach(cp); 720 g_destroy_consumer(cp); 721 g_destroy_geom(gp); 722 if (error != 0) 723 return (NULL); 724 gp = NULL; 725 726 if (strcmp(md.md_magic, G_CONCAT_MAGIC) != 0) 727 return (NULL); 728 if (md.md_version > G_CONCAT_VERSION) { 729 printf("geom_concat.ko module is too old to handle %s.\n", 730 pp->name); 731 return (NULL); 732 } 733 /* 734 * Backward compatibility: 735 */ 736 /* There was no md_provider field in earlier versions of metadata. */ 737 if (md.md_version < 3) 738 bzero(md.md_provider, sizeof(md.md_provider)); 739 /* There was no md_provsize field in earlier versions of metadata. */ 740 if (md.md_version < 4) 741 md.md_provsize = pp->mediasize; 742 743 if (md.md_provider[0] != '\0' && 744 !g_compare_names(md.md_provider, pp->name)) 745 return (NULL); 746 if (md.md_provsize != pp->mediasize) 747 return (NULL); 748 749 /* 750 * Let's check if device already exists. 751 */ 752 sc = NULL; 753 LIST_FOREACH(gp, &mp->geom, geom) { 754 sc = gp->softc; 755 if (sc == NULL) 756 continue; 757 if (sc->sc_type != G_CONCAT_TYPE_AUTOMATIC) 758 continue; 759 if (strcmp(md.md_name, sc->sc_name) != 0) 760 continue; 761 if (md.md_id != sc->sc_id) 762 continue; 763 break; 764 } 765 if (gp != NULL) { 766 G_CONCAT_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); 767 error = g_concat_add_disk(sc, pp, md.md_no); 768 if (error != 0) { 769 G_CONCAT_DEBUG(0, 770 "Cannot add disk %s to %s (error=%d).", pp->name, 771 gp->name, error); 772 return (NULL); 773 } 774 } else { 775 gp = g_concat_create(mp, &md, G_CONCAT_TYPE_AUTOMATIC); 776 if (gp == NULL) { 777 G_CONCAT_DEBUG(0, "Cannot create device %s.", 778 md.md_name); 779 return (NULL); 780 } 781 sc = gp->softc; 782 G_CONCAT_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); 783 error = g_concat_add_disk(sc, pp, md.md_no); 784 if (error != 0) { 785 G_CONCAT_DEBUG(0, 786 "Cannot add disk %s to %s (error=%d).", pp->name, 787 gp->name, error); 788 g_concat_destroy(sc, 1); 789 return (NULL); 790 } 791 } 792 793 return (gp); 794 } 795 796 static void 797 g_concat_ctl_create(struct gctl_req *req, struct g_class *mp) 798 { 799 u_int attached, no; 800 struct g_concat_metadata md; 801 struct g_provider *pp; 802 struct g_concat_softc *sc; 803 struct g_geom *gp; 804 struct sbuf *sb; 805 const char *name; 806 char param[16]; 807 int *nargs; 808 809 g_topology_assert(); 810 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 811 if (nargs == NULL) { 812 gctl_error(req, "No '%s' argument.", "nargs"); 813 return; 814 } 815 if (*nargs < 2) { 816 gctl_error(req, "Too few arguments."); 817 return; 818 } 819 820 strlcpy(md.md_magic, G_CONCAT_MAGIC, sizeof(md.md_magic)); 821 md.md_version = G_CONCAT_VERSION; 822 name = gctl_get_asciiparam(req, "arg0"); 823 if (name == NULL) { 824 gctl_error(req, "No 'arg%u' argument.", 0); 825 return; 826 } 827 strlcpy(md.md_name, name, sizeof(md.md_name)); 828 md.md_id = arc4random(); 829 md.md_no = 0; 830 md.md_all = *nargs - 1; 831 bzero(md.md_provider, sizeof(md.md_provider)); 832 /* This field is not important here. */ 833 md.md_provsize = 0; 834 835 /* Check all providers are valid */ 836 for (no = 1; no < *nargs; no++) { 837 snprintf(param, sizeof(param), "arg%u", no); 838 name = gctl_get_asciiparam(req, param); 839 if (name == NULL) { 840 gctl_error(req, "No 'arg%u' argument.", no); 841 return; 842 } 843 if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 844 name += strlen("/dev/"); 845 pp = g_provider_by_name(name); 846 if (pp == NULL) { 847 G_CONCAT_DEBUG(1, "Disk %s is invalid.", name); 848 gctl_error(req, "Disk %s is invalid.", name); 849 return; 850 } 851 } 852 853 gp = g_concat_create(mp, &md, G_CONCAT_TYPE_MANUAL); 854 if (gp == NULL) { 855 gctl_error(req, "Can't configure %s.", md.md_name); 856 return; 857 } 858 859 sc = gp->softc; 860 sb = sbuf_new_auto(); 861 sbuf_printf(sb, "Can't attach disk(s) to %s:", gp->name); 862 for (attached = 0, no = 1; no < *nargs; no++) { 863 snprintf(param, sizeof(param), "arg%u", no); 864 name = gctl_get_asciiparam(req, param); 865 if (name == NULL) { 866 gctl_error(req, "No 'arg%d' argument.", no); 867 return; 868 } 869 if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 870 name += strlen("/dev/"); 871 pp = g_provider_by_name(name); 872 KASSERT(pp != NULL, ("Provider %s disappear?!", name)); 873 if (g_concat_add_disk(sc, pp, no - 1) != 0) { 874 G_CONCAT_DEBUG(1, "Disk %u (%s) not attached to %s.", 875 no, pp->name, gp->name); 876 sbuf_printf(sb, " %s", pp->name); 877 continue; 878 } 879 attached++; 880 } 881 sbuf_finish(sb); 882 if (md.md_all != attached) { 883 g_concat_destroy(gp->softc, 1); 884 gctl_error(req, "%s", sbuf_data(sb)); 885 } 886 sbuf_delete(sb); 887 } 888 889 static struct g_concat_softc * 890 g_concat_find_device(struct g_class *mp, const char *name) 891 { 892 struct g_concat_softc *sc; 893 struct g_geom *gp; 894 895 LIST_FOREACH(gp, &mp->geom, geom) { 896 sc = gp->softc; 897 if (sc == NULL) 898 continue; 899 if (strcmp(sc->sc_name, name) == 0) 900 return (sc); 901 } 902 return (NULL); 903 } 904 905 static void 906 g_concat_ctl_destroy(struct gctl_req *req, struct g_class *mp) 907 { 908 struct g_concat_softc *sc; 909 int *force, *nargs, error; 910 const char *name; 911 char param[16]; 912 u_int i; 913 914 g_topology_assert(); 915 916 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 917 if (nargs == NULL) { 918 gctl_error(req, "No '%s' argument.", "nargs"); 919 return; 920 } 921 if (*nargs <= 0) { 922 gctl_error(req, "Missing device(s)."); 923 return; 924 } 925 force = gctl_get_paraml(req, "force", sizeof(*force)); 926 if (force == NULL) { 927 gctl_error(req, "No '%s' argument.", "force"); 928 return; 929 } 930 931 for (i = 0; i < (u_int)*nargs; i++) { 932 snprintf(param, sizeof(param), "arg%u", i); 933 name = gctl_get_asciiparam(req, param); 934 if (name == NULL) { 935 gctl_error(req, "No 'arg%u' argument.", i); 936 return; 937 } 938 sc = g_concat_find_device(mp, name); 939 if (sc == NULL) { 940 gctl_error(req, "No such device: %s.", name); 941 return; 942 } 943 error = g_concat_destroy(sc, *force); 944 if (error != 0) { 945 gctl_error(req, "Cannot destroy device %s (error=%d).", 946 sc->sc_name, error); 947 return; 948 } 949 } 950 } 951 952 static void 953 g_concat_config(struct gctl_req *req, struct g_class *mp, const char *verb) 954 { 955 uint32_t *version; 956 957 g_topology_assert(); 958 959 version = gctl_get_paraml(req, "version", sizeof(*version)); 960 if (version == NULL) { 961 gctl_error(req, "No '%s' argument.", "version"); 962 return; 963 } 964 if (*version != G_CONCAT_VERSION) { 965 gctl_error(req, "Userland and kernel parts are out of sync."); 966 return; 967 } 968 969 if (strcmp(verb, "create") == 0) { 970 g_concat_ctl_create(req, mp); 971 return; 972 } else if (strcmp(verb, "destroy") == 0 || 973 strcmp(verb, "stop") == 0) { 974 g_concat_ctl_destroy(req, mp); 975 return; 976 } 977 gctl_error(req, "Unknown verb."); 978 } 979 980 static void 981 g_concat_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 982 struct g_consumer *cp, struct g_provider *pp) 983 { 984 struct g_concat_softc *sc; 985 986 g_topology_assert(); 987 sc = gp->softc; 988 if (sc == NULL) 989 return; 990 if (pp != NULL) { 991 /* Nothing here. */ 992 } else if (cp != NULL) { 993 struct g_concat_disk *disk; 994 995 disk = cp->private; 996 if (disk == NULL) 997 return; 998 sbuf_printf(sb, "%s<End>%jd</End>\n", indent, 999 (intmax_t)disk->d_end); 1000 sbuf_printf(sb, "%s<Start>%jd</Start>\n", indent, 1001 (intmax_t)disk->d_start); 1002 } else { 1003 sbuf_printf(sb, "%s<ID>%u</ID>\n", indent, (u_int)sc->sc_id); 1004 sbuf_printf(sb, "%s<Type>", indent); 1005 switch (sc->sc_type) { 1006 case G_CONCAT_TYPE_AUTOMATIC: 1007 sbuf_printf(sb, "AUTOMATIC"); 1008 break; 1009 case G_CONCAT_TYPE_MANUAL: 1010 sbuf_printf(sb, "MANUAL"); 1011 break; 1012 default: 1013 sbuf_printf(sb, "UNKNOWN"); 1014 break; 1015 } 1016 sbuf_printf(sb, "</Type>\n"); 1017 sbuf_printf(sb, "%s<Status>Total=%u, Online=%u</Status>\n", 1018 indent, sc->sc_ndisks, g_concat_nvalid(sc)); 1019 sbuf_printf(sb, "%s<State>", indent); 1020 if (sc->sc_provider != NULL && sc->sc_provider->error == 0) 1021 sbuf_printf(sb, "UP"); 1022 else 1023 sbuf_printf(sb, "DOWN"); 1024 sbuf_printf(sb, "</State>\n"); 1025 } 1026 } 1027 1028 DECLARE_GEOM_CLASS(g_concat_class, g_concat); 1029 MODULE_VERSION(geom_concat, 0); 1030