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/geom_dbg.h> 44#include <geom/concat/g_concat.h> 45 46FEATURE(geom_concat, "GEOM concatenation support"); 47 48static MALLOC_DEFINE(M_CONCAT, "concat_data", "GEOM_CONCAT Data"); 49 50SYSCTL_DECL(_kern_geom); 51static SYSCTL_NODE(_kern_geom, OID_AUTO, concat, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 52 "GEOM_CONCAT stuff"); 53static u_int g_concat_debug = 0; 54SYSCTL_UINT(_kern_geom_concat, OID_AUTO, debug, CTLFLAG_RWTUN, &g_concat_debug, 0, 55 "Debug level"); 56 57static int g_concat_destroy(struct g_concat_softc *sc, boolean_t force); 58static int g_concat_destroy_geom(struct gctl_req *req, struct g_class *mp, 59 struct g_geom *gp); 60 61static g_taste_t g_concat_taste; 62static g_ctl_req_t g_concat_config; 63static g_dumpconf_t g_concat_dumpconf; 64 65struct g_class g_concat_class = { 66 .name = G_CONCAT_CLASS_NAME, 67 .version = G_VERSION, 68 .ctlreq = g_concat_config, 69 .taste = g_concat_taste, 70 .destroy_geom = g_concat_destroy_geom 71}; 72 73/* 74 * Greatest Common Divisor. 75 */ 76static u_int 77gcd(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 */ 92static u_int 93lcm(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 */ 102static u_int 103g_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 116static void 117g_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 150static void 151g_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 169static int 170g_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 199fail: 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 208static void 209g_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 225static void 226g_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 260static void 261g_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/* 282 * Called for both BIO_FLUSH and BIO_SPEEDUP. Just pass the call down 283 */ 284static void 285g_concat_passdown(struct g_concat_softc *sc, struct bio *bp) 286{ 287 struct bio_queue_head queue; 288 struct g_consumer *cp; 289 struct bio *cbp; 290 u_int no; 291 292 bioq_init(&queue); 293 for (no = 0; no < sc->sc_ndisks; no++) { 294 cbp = g_clone_bio(bp); 295 if (cbp == NULL) { 296 while ((cbp = bioq_takefirst(&queue)) != NULL) 297 g_destroy_bio(cbp); 298 if (bp->bio_error == 0) 299 bp->bio_error = ENOMEM; 300 g_io_deliver(bp, bp->bio_error); 301 return; 302 } 303 bioq_insert_tail(&queue, cbp); 304 cbp->bio_done = g_concat_done; 305 cbp->bio_caller1 = sc->sc_disks[no].d_consumer; 306 cbp->bio_to = sc->sc_disks[no].d_consumer->provider; 307 } 308 while ((cbp = bioq_takefirst(&queue)) != NULL) { 309 G_CONCAT_LOGREQ(cbp, "Sending request."); 310 cp = cbp->bio_caller1; 311 cbp->bio_caller1 = NULL; 312 g_io_request(cbp, cp); 313 } 314} 315 316static void 317g_concat_start(struct bio *bp) 318{ 319 struct bio_queue_head queue; 320 struct g_concat_softc *sc; 321 struct g_concat_disk *disk; 322 struct g_provider *pp; 323 off_t offset, end, length, off, len; 324 struct bio *cbp; 325 char *addr; 326 u_int no; 327 328 pp = bp->bio_to; 329 sc = pp->geom->softc; 330 /* 331 * If sc == NULL, provider's error should be set and g_concat_start() 332 * should not be called at all. 333 */ 334 KASSERT(sc != NULL, 335 ("Provider's error should be set (error=%d)(device=%s).", 336 bp->bio_to->error, bp->bio_to->name)); 337 338 G_CONCAT_LOGREQ(bp, "Request received."); 339 340 switch (bp->bio_cmd) { 341 case BIO_READ: 342 case BIO_WRITE: 343 case BIO_DELETE: 344 break; 345 case BIO_SPEEDUP: 346 case BIO_FLUSH: 347 g_concat_passdown(sc, bp); 348 return; 349 case BIO_GETATTR: 350 if (strcmp("GEOM::kerneldump", bp->bio_attribute) == 0) { 351 g_concat_kernel_dump(bp); 352 return; 353 } else if (strcmp("GEOM::candelete", bp->bio_attribute) == 0) { 354 g_concat_candelete(bp); 355 return; 356 } 357 /* To which provider it should be delivered? */ 358 /* FALLTHROUGH */ 359 default: 360 g_io_deliver(bp, EOPNOTSUPP); 361 return; 362 } 363 364 offset = bp->bio_offset; 365 length = bp->bio_length; 366 if ((bp->bio_flags & BIO_UNMAPPED) != 0) 367 addr = NULL; 368 else 369 addr = bp->bio_data; 370 end = offset + length; 371 372 bioq_init(&queue); 373 for (no = 0; no < sc->sc_ndisks; no++) { 374 disk = &sc->sc_disks[no]; 375 if (disk->d_end <= offset) 376 continue; 377 if (disk->d_start >= end) 378 break; 379 380 off = offset - disk->d_start; 381 len = MIN(length, disk->d_end - offset); 382 length -= len; 383 offset += len; 384 385 cbp = g_clone_bio(bp); 386 if (cbp == NULL) { 387 while ((cbp = bioq_takefirst(&queue)) != NULL) 388 g_destroy_bio(cbp); 389 if (bp->bio_error == 0) 390 bp->bio_error = ENOMEM; 391 g_io_deliver(bp, bp->bio_error); 392 return; 393 } 394 bioq_insert_tail(&queue, cbp); 395 /* 396 * Fill in the component buf structure. 397 */ 398 if (len == bp->bio_length) 399 cbp->bio_done = g_std_done; 400 else 401 cbp->bio_done = g_concat_done; 402 cbp->bio_offset = off; 403 cbp->bio_length = len; 404 if ((bp->bio_flags & BIO_UNMAPPED) != 0) { 405 cbp->bio_ma_offset += (uintptr_t)addr; 406 cbp->bio_ma += cbp->bio_ma_offset / PAGE_SIZE; 407 cbp->bio_ma_offset %= PAGE_SIZE; 408 cbp->bio_ma_n = round_page(cbp->bio_ma_offset + 409 cbp->bio_length) / PAGE_SIZE; 410 } else 411 cbp->bio_data = addr; 412 addr += len; 413 cbp->bio_to = disk->d_consumer->provider; 414 cbp->bio_caller1 = disk; 415 416 if (length == 0) 417 break; 418 } 419 KASSERT(length == 0, 420 ("Length is still greater than 0 (class=%s, name=%s).", 421 bp->bio_to->geom->class->name, bp->bio_to->geom->name)); 422 while ((cbp = bioq_takefirst(&queue)) != NULL) { 423 G_CONCAT_LOGREQ(cbp, "Sending request."); 424 disk = cbp->bio_caller1; 425 cbp->bio_caller1 = NULL; 426 g_io_request(cbp, disk->d_consumer); 427 } 428} 429 430static void 431g_concat_check_and_run(struct g_concat_softc *sc) 432{ 433 struct g_concat_disk *disk; 434 struct g_provider *dp, *pp; 435 u_int no, sectorsize = 0; 436 off_t start; 437 int error; 438 439 g_topology_assert(); 440 if (g_concat_nvalid(sc) != sc->sc_ndisks) 441 return; 442 443 pp = g_new_providerf(sc->sc_geom, "concat/%s", sc->sc_name); 444 pp->flags |= G_PF_DIRECT_SEND | G_PF_DIRECT_RECEIVE | 445 G_PF_ACCEPT_UNMAPPED; 446 start = 0; 447 for (no = 0; no < sc->sc_ndisks; no++) { 448 disk = &sc->sc_disks[no]; 449 dp = disk->d_consumer->provider; 450 disk->d_start = start; 451 disk->d_end = disk->d_start + dp->mediasize; 452 if (sc->sc_type == G_CONCAT_TYPE_AUTOMATIC) 453 disk->d_end -= dp->sectorsize; 454 start = disk->d_end; 455 error = g_access(disk->d_consumer, 1, 0, 0); 456 if (error == 0) { 457 error = g_getattr("GEOM::candelete", disk->d_consumer, 458 &disk->d_candelete); 459 if (error != 0) 460 disk->d_candelete = 0; 461 (void)g_access(disk->d_consumer, -1, 0, 0); 462 } else 463 G_CONCAT_DEBUG(1, "Failed to access disk %s, error %d.", 464 dp->name, error); 465 if (no == 0) 466 sectorsize = dp->sectorsize; 467 else 468 sectorsize = lcm(sectorsize, dp->sectorsize); 469 470 /* A provider underneath us doesn't support unmapped */ 471 if ((dp->flags & G_PF_ACCEPT_UNMAPPED) == 0) { 472 G_CONCAT_DEBUG(1, "Cancelling unmapped " 473 "because of %s.", dp->name); 474 pp->flags &= ~G_PF_ACCEPT_UNMAPPED; 475 } 476 } 477 pp->sectorsize = sectorsize; 478 /* We have sc->sc_disks[sc->sc_ndisks - 1].d_end in 'start'. */ 479 pp->mediasize = start; 480 pp->stripesize = sc->sc_disks[0].d_consumer->provider->stripesize; 481 pp->stripeoffset = sc->sc_disks[0].d_consumer->provider->stripeoffset; 482 sc->sc_provider = pp; 483 g_error_provider(pp, 0); 484 485 G_CONCAT_DEBUG(0, "Device %s activated.", sc->sc_provider->name); 486} 487 488static int 489g_concat_read_metadata(struct g_consumer *cp, struct g_concat_metadata *md) 490{ 491 struct g_provider *pp; 492 u_char *buf; 493 int error; 494 495 g_topology_assert(); 496 497 error = g_access(cp, 1, 0, 0); 498 if (error != 0) 499 return (error); 500 pp = cp->provider; 501 g_topology_unlock(); 502 buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize, 503 &error); 504 g_topology_lock(); 505 g_access(cp, -1, 0, 0); 506 if (buf == NULL) 507 return (error); 508 509 /* Decode metadata. */ 510 concat_metadata_decode(buf, md); 511 g_free(buf); 512 513 return (0); 514} 515 516/* 517 * Add disk to given device. 518 */ 519static int 520g_concat_add_disk(struct g_concat_softc *sc, struct g_provider *pp, u_int no) 521{ 522 struct g_concat_disk *disk; 523 struct g_consumer *cp, *fcp; 524 struct g_geom *gp; 525 int error; 526 527 g_topology_assert(); 528 /* Metadata corrupted? */ 529 if (no >= sc->sc_ndisks) 530 return (EINVAL); 531 532 disk = &sc->sc_disks[no]; 533 /* Check if disk is not already attached. */ 534 if (disk->d_consumer != NULL) 535 return (EEXIST); 536 537 gp = sc->sc_geom; 538 fcp = LIST_FIRST(&gp->consumer); 539 540 cp = g_new_consumer(gp); 541 cp->flags |= G_CF_DIRECT_SEND | G_CF_DIRECT_RECEIVE; 542 error = g_attach(cp, pp); 543 if (error != 0) { 544 g_destroy_consumer(cp); 545 return (error); 546 } 547 548 if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0)) { 549 error = g_access(cp, fcp->acr, fcp->acw, fcp->ace); 550 if (error != 0) { 551 g_detach(cp); 552 g_destroy_consumer(cp); 553 return (error); 554 } 555 } 556 if (sc->sc_type == G_CONCAT_TYPE_AUTOMATIC) { 557 struct g_concat_metadata md; 558 559 /* Re-read metadata. */ 560 error = g_concat_read_metadata(cp, &md); 561 if (error != 0) 562 goto fail; 563 564 if (strcmp(md.md_magic, G_CONCAT_MAGIC) != 0 || 565 strcmp(md.md_name, sc->sc_name) != 0 || 566 md.md_id != sc->sc_id) { 567 G_CONCAT_DEBUG(0, "Metadata on %s changed.", pp->name); 568 goto fail; 569 } 570 } 571 572 cp->private = disk; 573 disk->d_consumer = cp; 574 disk->d_softc = sc; 575 disk->d_start = 0; /* not yet */ 576 disk->d_end = 0; /* not yet */ 577 disk->d_removed = 0; 578 579 G_CONCAT_DEBUG(0, "Disk %s attached to %s.", pp->name, sc->sc_name); 580 581 g_concat_check_and_run(sc); 582 583 return (0); 584fail: 585 if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0)) 586 g_access(cp, -fcp->acr, -fcp->acw, -fcp->ace); 587 g_detach(cp); 588 g_destroy_consumer(cp); 589 return (error); 590} 591 592static struct g_geom * 593g_concat_create(struct g_class *mp, const struct g_concat_metadata *md, 594 u_int type) 595{ 596 struct g_concat_softc *sc; 597 struct g_geom *gp; 598 u_int no; 599 600 G_CONCAT_DEBUG(1, "Creating device %s (id=%u).", md->md_name, 601 md->md_id); 602 603 /* One disks is minimum. */ 604 if (md->md_all < 1) 605 return (NULL); 606 607 /* Check for duplicate unit */ 608 LIST_FOREACH(gp, &mp->geom, geom) { 609 sc = gp->softc; 610 if (sc != NULL && strcmp(sc->sc_name, md->md_name) == 0) { 611 G_CONCAT_DEBUG(0, "Device %s already configured.", 612 gp->name); 613 return (NULL); 614 } 615 } 616 gp = g_new_geomf(mp, "%s", md->md_name); 617 sc = malloc(sizeof(*sc), M_CONCAT, M_WAITOK | M_ZERO); 618 gp->start = g_concat_start; 619 gp->spoiled = g_concat_orphan; 620 gp->orphan = g_concat_orphan; 621 gp->access = g_concat_access; 622 gp->dumpconf = g_concat_dumpconf; 623 624 sc->sc_id = md->md_id; 625 sc->sc_ndisks = md->md_all; 626 sc->sc_disks = malloc(sizeof(struct g_concat_disk) * sc->sc_ndisks, 627 M_CONCAT, M_WAITOK | M_ZERO); 628 for (no = 0; no < sc->sc_ndisks; no++) 629 sc->sc_disks[no].d_consumer = NULL; 630 sc->sc_type = type; 631 mtx_init(&sc->sc_lock, "gconcat lock", NULL, MTX_DEF); 632 633 gp->softc = sc; 634 sc->sc_geom = gp; 635 sc->sc_provider = NULL; 636 637 G_CONCAT_DEBUG(0, "Device %s created (id=%u).", sc->sc_name, sc->sc_id); 638 639 return (gp); 640} 641 642static int 643g_concat_destroy(struct g_concat_softc *sc, boolean_t force) 644{ 645 struct g_provider *pp; 646 struct g_consumer *cp, *cp1; 647 struct g_geom *gp; 648 649 g_topology_assert(); 650 651 if (sc == NULL) 652 return (ENXIO); 653 654 pp = sc->sc_provider; 655 if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) { 656 if (force) { 657 G_CONCAT_DEBUG(0, "Device %s is still open, so it " 658 "can't be definitely removed.", pp->name); 659 } else { 660 G_CONCAT_DEBUG(1, 661 "Device %s is still open (r%dw%de%d).", pp->name, 662 pp->acr, pp->acw, pp->ace); 663 return (EBUSY); 664 } 665 } 666 667 gp = sc->sc_geom; 668 LIST_FOREACH_SAFE(cp, &gp->consumer, consumer, cp1) { 669 g_concat_remove_disk(cp->private); 670 if (cp1 == NULL) 671 return (0); /* Recursion happened. */ 672 } 673 if (!LIST_EMPTY(&gp->consumer)) 674 return (EINPROGRESS); 675 676 gp->softc = NULL; 677 KASSERT(sc->sc_provider == NULL, ("Provider still exists? (device=%s)", 678 gp->name)); 679 free(sc->sc_disks, M_CONCAT); 680 mtx_destroy(&sc->sc_lock); 681 free(sc, M_CONCAT); 682 683 G_CONCAT_DEBUG(0, "Device %s destroyed.", gp->name); 684 g_wither_geom(gp, ENXIO); 685 return (0); 686} 687 688static int 689g_concat_destroy_geom(struct gctl_req *req __unused, 690 struct g_class *mp __unused, struct g_geom *gp) 691{ 692 struct g_concat_softc *sc; 693 694 sc = gp->softc; 695 return (g_concat_destroy(sc, 0)); 696} 697 698static struct g_geom * 699g_concat_taste(struct g_class *mp, struct g_provider *pp, int flags __unused) 700{ 701 struct g_concat_metadata md; 702 struct g_concat_softc *sc; 703 struct g_consumer *cp; 704 struct g_geom *gp; 705 int error; 706 707 g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name); 708 g_topology_assert(); 709 710 /* Skip providers that are already open for writing. */ 711 if (pp->acw > 0) 712 return (NULL); 713 714 G_CONCAT_DEBUG(3, "Tasting %s.", pp->name); 715 716 gp = g_new_geomf(mp, "concat:taste"); 717 gp->start = g_concat_start; 718 gp->access = g_concat_access; 719 gp->orphan = g_concat_orphan; 720 cp = g_new_consumer(gp); 721 error = g_attach(cp, pp); 722 if (error == 0) { 723 error = g_concat_read_metadata(cp, &md); 724 g_detach(cp); 725 } 726 g_destroy_consumer(cp); 727 g_destroy_geom(gp); 728 if (error != 0) 729 return (NULL); 730 gp = NULL; 731 732 if (strcmp(md.md_magic, G_CONCAT_MAGIC) != 0) 733 return (NULL); 734 if (md.md_version > G_CONCAT_VERSION) { 735 printf("geom_concat.ko module is too old to handle %s.\n", 736 pp->name); 737 return (NULL); 738 } 739 /* 740 * Backward compatibility: 741 */ 742 /* There was no md_provider field in earlier versions of metadata. */ 743 if (md.md_version < 3) 744 bzero(md.md_provider, sizeof(md.md_provider)); 745 /* There was no md_provsize field in earlier versions of metadata. */ 746 if (md.md_version < 4) 747 md.md_provsize = pp->mediasize; 748 749 if (md.md_provider[0] != '\0' && 750 !g_compare_names(md.md_provider, pp->name)) 751 return (NULL); 752 if (md.md_provsize != pp->mediasize) 753 return (NULL); 754 755 /* 756 * Let's check if device already exists. 757 */ 758 sc = NULL; 759 LIST_FOREACH(gp, &mp->geom, geom) { 760 sc = gp->softc; 761 if (sc == NULL) 762 continue; 763 if (sc->sc_type != G_CONCAT_TYPE_AUTOMATIC) 764 continue; 765 if (strcmp(md.md_name, sc->sc_name) != 0) 766 continue; 767 if (md.md_id != sc->sc_id) 768 continue; 769 break; 770 } 771 if (gp != NULL) { 772 G_CONCAT_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); 773 error = g_concat_add_disk(sc, pp, md.md_no); 774 if (error != 0) { 775 G_CONCAT_DEBUG(0, 776 "Cannot add disk %s to %s (error=%d).", pp->name, 777 gp->name, error); 778 return (NULL); 779 } 780 } else { 781 gp = g_concat_create(mp, &md, G_CONCAT_TYPE_AUTOMATIC); 782 if (gp == NULL) { 783 G_CONCAT_DEBUG(0, "Cannot create device %s.", 784 md.md_name); 785 return (NULL); 786 } 787 sc = gp->softc; 788 G_CONCAT_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); 789 error = g_concat_add_disk(sc, pp, md.md_no); 790 if (error != 0) { 791 G_CONCAT_DEBUG(0, 792 "Cannot add disk %s to %s (error=%d).", pp->name, 793 gp->name, error); 794 g_concat_destroy(sc, 1); 795 return (NULL); 796 } 797 } 798 799 return (gp); 800} 801 802static void 803g_concat_ctl_create(struct gctl_req *req, struct g_class *mp) 804{ 805 u_int attached, no; 806 struct g_concat_metadata md; 807 struct g_provider *pp; 808 struct g_concat_softc *sc; 809 struct g_geom *gp; 810 struct sbuf *sb; 811 const char *name; 812 char param[16]; 813 int *nargs; 814 815 g_topology_assert(); 816 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 817 if (nargs == NULL) { 818 gctl_error(req, "No '%s' argument.", "nargs"); 819 return; 820 } 821 if (*nargs < 2) { 822 gctl_error(req, "Too few arguments."); 823 return; 824 } 825 826 strlcpy(md.md_magic, G_CONCAT_MAGIC, sizeof(md.md_magic)); 827 md.md_version = G_CONCAT_VERSION; 828 name = gctl_get_asciiparam(req, "arg0"); 829 if (name == NULL) { 830 gctl_error(req, "No 'arg%u' argument.", 0); 831 return; 832 } 833 strlcpy(md.md_name, name, sizeof(md.md_name)); 834 md.md_id = arc4random(); 835 md.md_no = 0; 836 md.md_all = *nargs - 1; 837 bzero(md.md_provider, sizeof(md.md_provider)); 838 /* This field is not important here. */ 839 md.md_provsize = 0; 840 841 /* Check all providers are valid */ 842 for (no = 1; no < *nargs; no++) { 843 snprintf(param, sizeof(param), "arg%u", no); 844 pp = gctl_get_provider(req, param); 845 if (pp == NULL) 846 return; 847 } 848 849 gp = g_concat_create(mp, &md, G_CONCAT_TYPE_MANUAL); 850 if (gp == NULL) { 851 gctl_error(req, "Can't configure %s.", md.md_name); 852 return; 853 } 854 855 sc = gp->softc; 856 sb = sbuf_new_auto(); 857 sbuf_printf(sb, "Can't attach disk(s) to %s:", gp->name); 858 for (attached = 0, no = 1; no < *nargs; no++) { 859 snprintf(param, sizeof(param), "arg%u", no); 860 pp = gctl_get_provider(req, param); 861 if (pp == NULL) { 862 name = gctl_get_asciiparam(req, param); 863 MPASS(name != NULL); 864 sbuf_printf(sb, " %s", name); 865 continue; 866 } 867 if (g_concat_add_disk(sc, pp, no - 1) != 0) { 868 G_CONCAT_DEBUG(1, "Disk %u (%s) not attached to %s.", 869 no, pp->name, gp->name); 870 sbuf_printf(sb, " %s", pp->name); 871 continue; 872 } 873 attached++; 874 } 875 sbuf_finish(sb); 876 if (md.md_all != attached) { 877 g_concat_destroy(gp->softc, 1); 878 gctl_error(req, "%s", sbuf_data(sb)); 879 } 880 sbuf_delete(sb); 881} 882 883static struct g_concat_softc * 884g_concat_find_device(struct g_class *mp, const char *name) 885{ 886 struct g_concat_softc *sc; 887 struct g_geom *gp; 888 889 if (strncmp(name, _PATH_DEV, strlen(_PATH_DEV)) == 0) 890 name += strlen(_PATH_DEV); 891 892 LIST_FOREACH(gp, &mp->geom, geom) { 893 sc = gp->softc; 894 if (sc == NULL) 895 continue; 896 if (strcmp(sc->sc_name, name) == 0) 897 return (sc); 898 } 899 return (NULL); 900} 901 902static void 903g_concat_ctl_destroy(struct gctl_req *req, struct g_class *mp) 904{ 905 struct g_concat_softc *sc; 906 int *force, *nargs, error; 907 const char *name; 908 char param[16]; 909 u_int i; 910 911 g_topology_assert(); 912 913 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 914 if (nargs == NULL) { 915 gctl_error(req, "No '%s' argument.", "nargs"); 916 return; 917 } 918 if (*nargs <= 0) { 919 gctl_error(req, "Missing device(s)."); 920 return; 921 } 922 force = gctl_get_paraml(req, "force", sizeof(*force)); 923 if (force == NULL) { 924 gctl_error(req, "No '%s' argument.", "force"); 925 return; 926 } 927 928 for (i = 0; i < (u_int)*nargs; i++) { 929 snprintf(param, sizeof(param), "arg%u", i); 930 name = gctl_get_asciiparam(req, param); 931 if (name == NULL) { 932 gctl_error(req, "No 'arg%u' argument.", i); 933 return; 934 } 935 sc = g_concat_find_device(mp, name); 936 if (sc == NULL) { 937 gctl_error(req, "No such device: %s.", name); 938 return; 939 } 940 error = g_concat_destroy(sc, *force); 941 if (error != 0) { 942 gctl_error(req, "Cannot destroy device %s (error=%d).", 943 sc->sc_name, error); 944 return; 945 } 946 } 947} 948 949static void 950g_concat_config(struct gctl_req *req, struct g_class *mp, const char *verb) 951{ 952 uint32_t *version; 953 954 g_topology_assert(); 955 956 version = gctl_get_paraml(req, "version", sizeof(*version)); 957 if (version == NULL) { 958 gctl_error(req, "No '%s' argument.", "version"); 959 return; 960 } 961 if (*version != G_CONCAT_VERSION) { 962 gctl_error(req, "Userland and kernel parts are out of sync."); 963 return; 964 } 965 966 if (strcmp(verb, "create") == 0) { 967 g_concat_ctl_create(req, mp); 968 return; 969 } else if (strcmp(verb, "destroy") == 0 || 970 strcmp(verb, "stop") == 0) { 971 g_concat_ctl_destroy(req, mp); 972 return; 973 } 974 gctl_error(req, "Unknown verb."); 975} 976 977static void 978g_concat_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 979 struct g_consumer *cp, struct g_provider *pp) 980{ 981 struct g_concat_softc *sc; 982 983 g_topology_assert(); 984 sc = gp->softc; 985 if (sc == NULL) 986 return; 987 if (pp != NULL) { 988 /* Nothing here. */ 989 } else if (cp != NULL) { 990 struct g_concat_disk *disk; 991 992 disk = cp->private; 993 if (disk == NULL) 994 return; 995 sbuf_printf(sb, "%s<End>%jd</End>\n", indent, 996 (intmax_t)disk->d_end); 997 sbuf_printf(sb, "%s<Start>%jd</Start>\n", indent, 998 (intmax_t)disk->d_start); 999 } else { 1000 sbuf_printf(sb, "%s<ID>%u</ID>\n", indent, (u_int)sc->sc_id); 1001 sbuf_printf(sb, "%s<Type>", indent); 1002 switch (sc->sc_type) { 1003 case G_CONCAT_TYPE_AUTOMATIC: 1004 sbuf_cat(sb, "AUTOMATIC"); 1005 break; 1006 case G_CONCAT_TYPE_MANUAL: 1007 sbuf_cat(sb, "MANUAL"); 1008 break; 1009 default: 1010 sbuf_cat(sb, "UNKNOWN"); 1011 break; 1012 } 1013 sbuf_cat(sb, "</Type>\n"); 1014 sbuf_printf(sb, "%s<Status>Total=%u, Online=%u</Status>\n", 1015 indent, sc->sc_ndisks, g_concat_nvalid(sc)); 1016 sbuf_printf(sb, "%s<State>", indent); 1017 if (sc->sc_provider != NULL && sc->sc_provider->error == 0) 1018 sbuf_cat(sb, "UP"); 1019 else 1020 sbuf_cat(sb, "DOWN"); 1021 sbuf_cat(sb, "</State>\n"); 1022 } 1023} 1024 1025DECLARE_GEOM_CLASS(g_concat_class, g_concat); 1026MODULE_VERSION(geom_concat, 0); 1027