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