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sys/geom/concat/g_concat.c
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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: releng/11.0/sys/geom/concat/g_concat.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 <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 SYSCTL_UINT(_kern_geom_concat, OID_AUTO, debug, CTLFLAG_RWTUN, &g_concat_debug, 0, 52 "Debug level"); 53 54 static int g_concat_destroy(struct g_concat_softc *sc, boolean_t force); 55 static int g_concat_destroy_geom(struct gctl_req *req, struct g_class *mp, 56 struct g_geom *gp); 57 58 static g_taste_t g_concat_taste; 59 static g_ctl_req_t g_concat_config; 60 static g_dumpconf_t g_concat_dumpconf; 61 62 struct g_class g_concat_class = { 63 .name = G_CONCAT_CLASS_NAME, 64 .version = G_VERSION, 65 .ctlreq = g_concat_config, 66 .taste = g_concat_taste, 67 .destroy_geom = g_concat_destroy_geom 68 }; 69 70 71 /* 72 * Greatest Common Divisor. 73 */ 74 static u_int 75 gcd(u_int a, u_int b) 76 { 77 u_int c; 78 79 while (b != 0) { 80 c = a; 81 a = b; 82 b = (c % b); 83 } 84 return (a); 85 } 86 87 /* 88 * Least Common Multiple. 89 */ 90 static u_int 91 lcm(u_int a, u_int b) 92 { 93 94 return ((a * b) / gcd(a, b)); 95 } 96 97 /* 98 * Return the number of valid disks. 99 */ 100 static u_int 101 g_concat_nvalid(struct g_concat_softc *sc) 102 { 103 u_int i, no; 104 105 no = 0; 106 for (i = 0; i < sc->sc_ndisks; i++) { 107 if (sc->sc_disks[i].d_consumer != NULL) 108 no++; 109 } 110 111 return (no); 112 } 113 114 static void 115 g_concat_remove_disk(struct g_concat_disk *disk) 116 { 117 struct g_consumer *cp; 118 struct g_concat_softc *sc; 119 120 g_topology_assert(); 121 KASSERT(disk->d_consumer != NULL, ("Non-valid disk in %s.", __func__)); 122 sc = disk->d_softc; 123 cp = disk->d_consumer; 124 125 if (!disk->d_removed) { 126 G_CONCAT_DEBUG(0, "Disk %s removed from %s.", 127 cp->provider->name, sc->sc_name); 128 disk->d_removed = 1; 129 } 130 131 if (sc->sc_provider != NULL) { 132 sc->sc_provider->flags |= G_PF_WITHER; 133 G_CONCAT_DEBUG(0, "Device %s deactivated.", 134 sc->sc_provider->name); 135 g_orphan_provider(sc->sc_provider, ENXIO); 136 sc->sc_provider = NULL; 137 } 138 139 if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0) 140 return; 141 disk->d_consumer = NULL; 142 g_detach(cp); 143 g_destroy_consumer(cp); 144 /* If there are no valid disks anymore, remove device. */ 145 if (LIST_EMPTY(&sc->sc_geom->consumer)) 146 g_concat_destroy(sc, 1); 147 } 148 149 static void 150 g_concat_orphan(struct g_consumer *cp) 151 { 152 struct g_concat_softc *sc; 153 struct g_concat_disk *disk; 154 struct g_geom *gp; 155 156 g_topology_assert(); 157 gp = cp->geom; 158 sc = gp->softc; 159 if (sc == NULL) 160 return; 161 162 disk = cp->private; 163 if (disk == NULL) /* Possible? */ 164 return; 165 g_concat_remove_disk(disk); 166 } 167 168 static int 169 g_concat_access(struct g_provider *pp, int dr, int dw, int de) 170 { 171 struct g_consumer *cp1, *cp2, *tmp; 172 struct g_concat_disk *disk; 173 struct g_geom *gp; 174 int error; 175 176 g_topology_assert(); 177 gp = pp->geom; 178 179 /* On first open, grab an extra "exclusive" bit */ 180 if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0) 181 de++; 182 /* ... and let go of it on last close */ 183 if ((pp->acr + dr) == 0 && (pp->acw + dw) == 0 && (pp->ace + de) == 0) 184 de--; 185 186 LIST_FOREACH_SAFE(cp1, &gp->consumer, consumer, tmp) { 187 error = g_access(cp1, dr, dw, de); 188 if (error != 0) 189 goto fail; 190 disk = cp1->private; 191 if (cp1->acr == 0 && cp1->acw == 0 && cp1->ace == 0 && 192 disk->d_removed) { 193 g_concat_remove_disk(disk); /* May destroy geom. */ 194 } 195 } 196 return (0); 197 198 fail: 199 LIST_FOREACH(cp2, &gp->consumer, consumer) { 200 if (cp1 == cp2) 201 break; 202 g_access(cp2, -dr, -dw, -de); 203 } 204 return (error); 205 } 206 207 static void 208 g_concat_kernel_dump(struct bio *bp) 209 { 210 struct g_concat_softc *sc; 211 struct g_concat_disk *disk; 212 struct bio *cbp; 213 struct g_kerneldump *gkd; 214 u_int i; 215 216 sc = bp->bio_to->geom->softc; 217 gkd = (struct g_kerneldump *)bp->bio_data; 218 for (i = 0; i < sc->sc_ndisks; i++) { 219 if (sc->sc_disks[i].d_start <= gkd->offset && 220 sc->sc_disks[i].d_end > gkd->offset) 221 break; 222 } 223 if (i == sc->sc_ndisks) 224 g_io_deliver(bp, EOPNOTSUPP); 225 disk = &sc->sc_disks[i]; 226 gkd->offset -= disk->d_start; 227 if (gkd->length > disk->d_end - disk->d_start - gkd->offset) 228 gkd->length = disk->d_end - disk->d_start - gkd->offset; 229 cbp = g_clone_bio(bp); 230 if (cbp == NULL) { 231 g_io_deliver(bp, ENOMEM); 232 return; 233 } 234 cbp->bio_done = g_std_done; 235 g_io_request(cbp, disk->d_consumer); 236 G_CONCAT_DEBUG(1, "Kernel dump will go to %s.", 237 disk->d_consumer->provider->name); 238 } 239 240 static void 241 g_concat_done(struct bio *bp) 242 { 243 struct g_concat_softc *sc; 244 struct bio *pbp; 245 246 pbp = bp->bio_parent; 247 sc = pbp->bio_to->geom->softc; 248 mtx_lock(&sc->sc_lock); 249 if (pbp->bio_error == 0) 250 pbp->bio_error = bp->bio_error; 251 pbp->bio_completed += bp->bio_completed; 252 pbp->bio_inbed++; 253 if (pbp->bio_children == pbp->bio_inbed) { 254 mtx_unlock(&sc->sc_lock); 255 g_io_deliver(pbp, pbp->bio_error); 256 } else 257 mtx_unlock(&sc->sc_lock); 258 g_destroy_bio(bp); 259 } 260 261 static void 262 g_concat_flush(struct g_concat_softc *sc, struct bio *bp) 263 { 264 struct bio_queue_head queue; 265 struct g_consumer *cp; 266 struct bio *cbp; 267 u_int no; 268 269 bioq_init(&queue); 270 for (no = 0; no < sc->sc_ndisks; no++) { 271 cbp = g_clone_bio(bp); 272 if (cbp == NULL) { 273 while ((cbp = bioq_takefirst(&queue)) != NULL) 274 g_destroy_bio(cbp); 275 if (bp->bio_error == 0) 276 bp->bio_error = ENOMEM; 277 g_io_deliver(bp, bp->bio_error); 278 return; 279 } 280 bioq_insert_tail(&queue, cbp); 281 cbp->bio_done = g_concat_done; 282 cbp->bio_caller1 = sc->sc_disks[no].d_consumer; 283 cbp->bio_to = sc->sc_disks[no].d_consumer->provider; 284 } 285 while ((cbp = bioq_takefirst(&queue)) != NULL) { 286 G_CONCAT_LOGREQ(cbp, "Sending request."); 287 cp = cbp->bio_caller1; 288 cbp->bio_caller1 = NULL; 289 g_io_request(cbp, cp); 290 } 291 } 292 293 static void 294 g_concat_start(struct bio *bp) 295 { 296 struct bio_queue_head queue; 297 struct g_concat_softc *sc; 298 struct g_concat_disk *disk; 299 struct g_provider *pp; 300 off_t offset, end, length, off, len; 301 struct bio *cbp; 302 char *addr; 303 u_int no; 304 305 pp = bp->bio_to; 306 sc = pp->geom->softc; 307 /* 308 * If sc == NULL, provider's error should be set and g_concat_start() 309 * should not be called at all. 310 */ 311 KASSERT(sc != NULL, 312 ("Provider's error should be set (error=%d)(device=%s).", 313 bp->bio_to->error, bp->bio_to->name)); 314 315 G_CONCAT_LOGREQ(bp, "Request received."); 316 317 switch (bp->bio_cmd) { 318 case BIO_READ: 319 case BIO_WRITE: 320 case BIO_DELETE: 321 break; 322 case BIO_FLUSH: 323 g_concat_flush(sc, bp); 324 return; 325 case BIO_GETATTR: 326 if (strcmp("GEOM::kerneldump", bp->bio_attribute) == 0) { 327 g_concat_kernel_dump(bp); 328 return; 329 } 330 /* To which provider it should be delivered? */ 331 /* FALLTHROUGH */ 332 default: 333 g_io_deliver(bp, EOPNOTSUPP); 334 return; 335 } 336 337 offset = bp->bio_offset; 338 length = bp->bio_length; 339 if ((bp->bio_flags & BIO_UNMAPPED) != 0) 340 addr = NULL; 341 else 342 addr = bp->bio_data; 343 end = offset + length; 344 345 bioq_init(&queue); 346 for (no = 0; no < sc->sc_ndisks; no++) { 347 disk = &sc->sc_disks[no]; 348 if (disk->d_end <= offset) 349 continue; 350 if (disk->d_start >= end) 351 break; 352 353 off = offset - disk->d_start; 354 len = MIN(length, disk->d_end - offset); 355 length -= len; 356 offset += len; 357 358 cbp = g_clone_bio(bp); 359 if (cbp == NULL) { 360 while ((cbp = bioq_takefirst(&queue)) != NULL) 361 g_destroy_bio(cbp); 362 if (bp->bio_error == 0) 363 bp->bio_error = ENOMEM; 364 g_io_deliver(bp, bp->bio_error); 365 return; 366 } 367 bioq_insert_tail(&queue, cbp); 368 /* 369 * Fill in the component buf structure. 370 */ 371 if (len == bp->bio_length) 372 cbp->bio_done = g_std_done; 373 else 374 cbp->bio_done = g_concat_done; 375 cbp->bio_offset = off; 376 cbp->bio_length = len; 377 if ((bp->bio_flags & BIO_UNMAPPED) != 0) { 378 cbp->bio_ma_offset += (uintptr_t)addr; 379 cbp->bio_ma += cbp->bio_ma_offset / PAGE_SIZE; 380 cbp->bio_ma_offset %= PAGE_SIZE; 381 cbp->bio_ma_n = round_page(cbp->bio_ma_offset + 382 cbp->bio_length) / PAGE_SIZE; 383 } else 384 cbp->bio_data = addr; 385 addr += len; 386 cbp->bio_to = disk->d_consumer->provider; 387 cbp->bio_caller1 = disk; 388 389 if (length == 0) 390 break; 391 } 392 KASSERT(length == 0, 393 ("Length is still greater than 0 (class=%s, name=%s).", 394 bp->bio_to->geom->class->name, bp->bio_to->geom->name)); 395 while ((cbp = bioq_takefirst(&queue)) != NULL) { 396 G_CONCAT_LOGREQ(cbp, "Sending request."); 397 disk = cbp->bio_caller1; 398 cbp->bio_caller1 = NULL; 399 g_io_request(cbp, disk->d_consumer); 400 } 401 } 402 403 static void 404 g_concat_check_and_run(struct g_concat_softc *sc) 405 { 406 struct g_concat_disk *disk; 407 struct g_provider *dp, *pp; 408 u_int no, sectorsize = 0; 409 off_t start; 410 411 g_topology_assert(); 412 if (g_concat_nvalid(sc) != sc->sc_ndisks) 413 return; 414 415 pp = g_new_providerf(sc->sc_geom, "concat/%s", sc->sc_name); 416 pp->flags |= G_PF_DIRECT_SEND | G_PF_DIRECT_RECEIVE | 417 G_PF_ACCEPT_UNMAPPED; 418 start = 0; 419 for (no = 0; no < sc->sc_ndisks; no++) { 420 disk = &sc->sc_disks[no]; 421 dp = disk->d_consumer->provider; 422 disk->d_start = start; 423 disk->d_end = disk->d_start + dp->mediasize; 424 if (sc->sc_type == G_CONCAT_TYPE_AUTOMATIC) 425 disk->d_end -= dp->sectorsize; 426 start = disk->d_end; 427 if (no == 0) 428 sectorsize = dp->sectorsize; 429 else 430 sectorsize = lcm(sectorsize, dp->sectorsize); 431 432 /* A provider underneath us doesn't support unmapped */ 433 if ((dp->flags & G_PF_ACCEPT_UNMAPPED) == 0) { 434 G_CONCAT_DEBUG(1, "Cancelling unmapped " 435 "because of %s.", dp->name); 436 pp->flags &= ~G_PF_ACCEPT_UNMAPPED; 437 } 438 } 439 pp->sectorsize = sectorsize; 440 /* We have sc->sc_disks[sc->sc_ndisks - 1].d_end in 'start'. */ 441 pp->mediasize = start; 442 pp->stripesize = sc->sc_disks[0].d_consumer->provider->stripesize; 443 pp->stripeoffset = sc->sc_disks[0].d_consumer->provider->stripeoffset; 444 sc->sc_provider = pp; 445 g_error_provider(pp, 0); 446 447 G_CONCAT_DEBUG(0, "Device %s activated.", sc->sc_provider->name); 448 } 449 450 static int 451 g_concat_read_metadata(struct g_consumer *cp, struct g_concat_metadata *md) 452 { 453 struct g_provider *pp; 454 u_char *buf; 455 int error; 456 457 g_topology_assert(); 458 459 error = g_access(cp, 1, 0, 0); 460 if (error != 0) 461 return (error); 462 pp = cp->provider; 463 g_topology_unlock(); 464 buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize, 465 &error); 466 g_topology_lock(); 467 g_access(cp, -1, 0, 0); 468 if (buf == NULL) 469 return (error); 470 471 /* Decode metadata. */ 472 concat_metadata_decode(buf, md); 473 g_free(buf); 474 475 return (0); 476 } 477 478 /* 479 * Add disk to given device. 480 */ 481 static int 482 g_concat_add_disk(struct g_concat_softc *sc, struct g_provider *pp, u_int no) 483 { 484 struct g_concat_disk *disk; 485 struct g_consumer *cp, *fcp; 486 struct g_geom *gp; 487 int error; 488 489 g_topology_assert(); 490 /* Metadata corrupted? */ 491 if (no >= sc->sc_ndisks) 492 return (EINVAL); 493 494 disk = &sc->sc_disks[no]; 495 /* Check if disk is not already attached. */ 496 if (disk->d_consumer != NULL) 497 return (EEXIST); 498 499 gp = sc->sc_geom; 500 fcp = LIST_FIRST(&gp->consumer); 501 502 cp = g_new_consumer(gp); 503 cp->flags |= G_CF_DIRECT_SEND | G_CF_DIRECT_RECEIVE; 504 error = g_attach(cp, pp); 505 if (error != 0) { 506 g_destroy_consumer(cp); 507 return (error); 508 } 509 510 if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0)) { 511 error = g_access(cp, fcp->acr, fcp->acw, fcp->ace); 512 if (error != 0) { 513 g_detach(cp); 514 g_destroy_consumer(cp); 515 return (error); 516 } 517 } 518 if (sc->sc_type == G_CONCAT_TYPE_AUTOMATIC) { 519 struct g_concat_metadata md; 520 521 /* Re-read metadata. */ 522 error = g_concat_read_metadata(cp, &md); 523 if (error != 0) 524 goto fail; 525 526 if (strcmp(md.md_magic, G_CONCAT_MAGIC) != 0 || 527 strcmp(md.md_name, sc->sc_name) != 0 || 528 md.md_id != sc->sc_id) { 529 G_CONCAT_DEBUG(0, "Metadata on %s changed.", pp->name); 530 goto fail; 531 } 532 } 533 534 cp->private = disk; 535 disk->d_consumer = cp; 536 disk->d_softc = sc; 537 disk->d_start = 0; /* not yet */ 538 disk->d_end = 0; /* not yet */ 539 disk->d_removed = 0; 540 541 G_CONCAT_DEBUG(0, "Disk %s attached to %s.", pp->name, sc->sc_name); 542 543 g_concat_check_and_run(sc); 544 545 return (0); 546 fail: 547 if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0)) 548 g_access(cp, -fcp->acr, -fcp->acw, -fcp->ace); 549 g_detach(cp); 550 g_destroy_consumer(cp); 551 return (error); 552 } 553 554 static struct g_geom * 555 g_concat_create(struct g_class *mp, const struct g_concat_metadata *md, 556 u_int type) 557 { 558 struct g_concat_softc *sc; 559 struct g_geom *gp; 560 u_int no; 561 562 G_CONCAT_DEBUG(1, "Creating device %s (id=%u).", md->md_name, 563 md->md_id); 564 565 /* One disks is minimum. */ 566 if (md->md_all < 1) 567 return (NULL); 568 569 /* Check for duplicate unit */ 570 LIST_FOREACH(gp, &mp->geom, geom) { 571 sc = gp->softc; 572 if (sc != NULL && strcmp(sc->sc_name, md->md_name) == 0) { 573 G_CONCAT_DEBUG(0, "Device %s already configured.", 574 gp->name); 575 return (NULL); 576 } 577 } 578 gp = g_new_geomf(mp, "%s", md->md_name); 579 sc = malloc(sizeof(*sc), M_CONCAT, M_WAITOK | M_ZERO); 580 gp->start = g_concat_start; 581 gp->spoiled = g_concat_orphan; 582 gp->orphan = g_concat_orphan; 583 gp->access = g_concat_access; 584 gp->dumpconf = g_concat_dumpconf; 585 586 sc->sc_id = md->md_id; 587 sc->sc_ndisks = md->md_all; 588 sc->sc_disks = malloc(sizeof(struct g_concat_disk) * sc->sc_ndisks, 589 M_CONCAT, M_WAITOK | M_ZERO); 590 for (no = 0; no < sc->sc_ndisks; no++) 591 sc->sc_disks[no].d_consumer = NULL; 592 sc->sc_type = type; 593 mtx_init(&sc->sc_lock, "gconcat lock", NULL, MTX_DEF); 594 595 gp->softc = sc; 596 sc->sc_geom = gp; 597 sc->sc_provider = NULL; 598 599 G_CONCAT_DEBUG(0, "Device %s created (id=%u).", sc->sc_name, sc->sc_id); 600 601 return (gp); 602 } 603 604 static int 605 g_concat_destroy(struct g_concat_softc *sc, boolean_t force) 606 { 607 struct g_provider *pp; 608 struct g_consumer *cp, *cp1; 609 struct g_geom *gp; 610 611 g_topology_assert(); 612 613 if (sc == NULL) 614 return (ENXIO); 615 616 pp = sc->sc_provider; 617 if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) { 618 if (force) { 619 G_CONCAT_DEBUG(0, "Device %s is still open, so it " 620 "can't be definitely removed.", pp->name); 621 } else { 622 G_CONCAT_DEBUG(1, 623 "Device %s is still open (r%dw%de%d).", pp->name, 624 pp->acr, pp->acw, pp->ace); 625 return (EBUSY); 626 } 627 } 628 629 gp = sc->sc_geom; 630 LIST_FOREACH_SAFE(cp, &gp->consumer, consumer, cp1) { 631 g_concat_remove_disk(cp->private); 632 if (cp1 == NULL) 633 return (0); /* Recursion happened. */ 634 } 635 if (!LIST_EMPTY(&gp->consumer)) 636 return (EINPROGRESS); 637 638 gp->softc = NULL; 639 KASSERT(sc->sc_provider == NULL, ("Provider still exists? (device=%s)", 640 gp->name)); 641 free(sc->sc_disks, M_CONCAT); 642 mtx_destroy(&sc->sc_lock); 643 free(sc, M_CONCAT); 644 645 G_CONCAT_DEBUG(0, "Device %s destroyed.", gp->name); 646 g_wither_geom(gp, ENXIO); 647 return (0); 648 } 649 650 static int 651 g_concat_destroy_geom(struct gctl_req *req __unused, 652 struct g_class *mp __unused, struct g_geom *gp) 653 { 654 struct g_concat_softc *sc; 655 656 sc = gp->softc; 657 return (g_concat_destroy(sc, 0)); 658 } 659 660 static struct g_geom * 661 g_concat_taste(struct g_class *mp, struct g_provider *pp, int flags __unused) 662 { 663 struct g_concat_metadata md; 664 struct g_concat_softc *sc; 665 struct g_consumer *cp; 666 struct g_geom *gp; 667 int error; 668 669 g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name); 670 g_topology_assert(); 671 672 /* Skip providers that are already open for writing. */ 673 if (pp->acw > 0) 674 return (NULL); 675 676 G_CONCAT_DEBUG(3, "Tasting %s.", pp->name); 677 678 gp = g_new_geomf(mp, "concat:taste"); 679 gp->start = g_concat_start; 680 gp->access = g_concat_access; 681 gp->orphan = g_concat_orphan; 682 cp = g_new_consumer(gp); 683 g_attach(cp, pp); 684 error = g_concat_read_metadata(cp, &md); 685 g_detach(cp); 686 g_destroy_consumer(cp); 687 g_destroy_geom(gp); 688 if (error != 0) 689 return (NULL); 690 gp = NULL; 691 692 if (strcmp(md.md_magic, G_CONCAT_MAGIC) != 0) 693 return (NULL); 694 if (md.md_version > G_CONCAT_VERSION) { 695 printf("geom_concat.ko module is too old to handle %s.\n", 696 pp->name); 697 return (NULL); 698 } 699 /* 700 * Backward compatibility: 701 */ 702 /* There was no md_provider field in earlier versions of metadata. */ 703 if (md.md_version < 3) 704 bzero(md.md_provider, sizeof(md.md_provider)); 705 /* There was no md_provsize field in earlier versions of metadata. */ 706 if (md.md_version < 4) 707 md.md_provsize = pp->mediasize; 708 709 if (md.md_provider[0] != '\0' && 710 !g_compare_names(md.md_provider, pp->name)) 711 return (NULL); 712 if (md.md_provsize != pp->mediasize) 713 return (NULL); 714 715 /* 716 * Let's check if device already exists. 717 */ 718 sc = NULL; 719 LIST_FOREACH(gp, &mp->geom, geom) { 720 sc = gp->softc; 721 if (sc == NULL) 722 continue; 723 if (sc->sc_type != G_CONCAT_TYPE_AUTOMATIC) 724 continue; 725 if (strcmp(md.md_name, sc->sc_name) != 0) 726 continue; 727 if (md.md_id != sc->sc_id) 728 continue; 729 break; 730 } 731 if (gp != NULL) { 732 G_CONCAT_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); 733 error = g_concat_add_disk(sc, pp, md.md_no); 734 if (error != 0) { 735 G_CONCAT_DEBUG(0, 736 "Cannot add disk %s to %s (error=%d).", pp->name, 737 gp->name, error); 738 return (NULL); 739 } 740 } else { 741 gp = g_concat_create(mp, &md, G_CONCAT_TYPE_AUTOMATIC); 742 if (gp == NULL) { 743 G_CONCAT_DEBUG(0, "Cannot create device %s.", 744 md.md_name); 745 return (NULL); 746 } 747 sc = gp->softc; 748 G_CONCAT_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); 749 error = g_concat_add_disk(sc, pp, md.md_no); 750 if (error != 0) { 751 G_CONCAT_DEBUG(0, 752 "Cannot add disk %s to %s (error=%d).", pp->name, 753 gp->name, error); 754 g_concat_destroy(sc, 1); 755 return (NULL); 756 } 757 } 758 759 return (gp); 760 } 761 762 static void 763 g_concat_ctl_create(struct gctl_req *req, struct g_class *mp) 764 { 765 u_int attached, no; 766 struct g_concat_metadata md; 767 struct g_provider *pp; 768 struct g_concat_softc *sc; 769 struct g_geom *gp; 770 struct sbuf *sb; 771 const char *name; 772 char param[16]; 773 int *nargs; 774 775 g_topology_assert(); 776 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 777 if (nargs == NULL) { 778 gctl_error(req, "No '%s' argument.", "nargs"); 779 return; 780 } 781 if (*nargs < 2) { 782 gctl_error(req, "Too few arguments."); 783 return; 784 } 785 786 strlcpy(md.md_magic, G_CONCAT_MAGIC, sizeof(md.md_magic)); 787 md.md_version = G_CONCAT_VERSION; 788 name = gctl_get_asciiparam(req, "arg0"); 789 if (name == NULL) { 790 gctl_error(req, "No 'arg%u' argument.", 0); 791 return; 792 } 793 strlcpy(md.md_name, name, sizeof(md.md_name)); 794 md.md_id = arc4random(); 795 md.md_no = 0; 796 md.md_all = *nargs - 1; 797 bzero(md.md_provider, sizeof(md.md_provider)); 798 /* This field is not important here. */ 799 md.md_provsize = 0; 800 801 /* Check all providers are valid */ 802 for (no = 1; no < *nargs; no++) { 803 snprintf(param, sizeof(param), "arg%u", no); 804 name = gctl_get_asciiparam(req, param); 805 if (name == NULL) { 806 gctl_error(req, "No 'arg%u' argument.", no); 807 return; 808 } 809 if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 810 name += strlen("/dev/"); 811 pp = g_provider_by_name(name); 812 if (pp == NULL) { 813 G_CONCAT_DEBUG(1, "Disk %s is invalid.", name); 814 gctl_error(req, "Disk %s is invalid.", name); 815 return; 816 } 817 } 818 819 gp = g_concat_create(mp, &md, G_CONCAT_TYPE_MANUAL); 820 if (gp == NULL) { 821 gctl_error(req, "Can't configure %s.", md.md_name); 822 return; 823 } 824 825 sc = gp->softc; 826 sb = sbuf_new_auto(); 827 sbuf_printf(sb, "Can't attach disk(s) to %s:", gp->name); 828 for (attached = 0, no = 1; no < *nargs; no++) { 829 snprintf(param, sizeof(param), "arg%u", no); 830 name = gctl_get_asciiparam(req, param); 831 if (name == NULL) { 832 gctl_error(req, "No 'arg%d' argument.", no); 833 return; 834 } 835 if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 836 name += strlen("/dev/"); 837 pp = g_provider_by_name(name); 838 KASSERT(pp != NULL, ("Provider %s disappear?!", name)); 839 if (g_concat_add_disk(sc, pp, no - 1) != 0) { 840 G_CONCAT_DEBUG(1, "Disk %u (%s) not attached to %s.", 841 no, pp->name, gp->name); 842 sbuf_printf(sb, " %s", pp->name); 843 continue; 844 } 845 attached++; 846 } 847 sbuf_finish(sb); 848 if (md.md_all != attached) { 849 g_concat_destroy(gp->softc, 1); 850 gctl_error(req, "%s", sbuf_data(sb)); 851 } 852 sbuf_delete(sb); 853 } 854 855 static struct g_concat_softc * 856 g_concat_find_device(struct g_class *mp, const char *name) 857 { 858 struct g_concat_softc *sc; 859 struct g_geom *gp; 860 861 LIST_FOREACH(gp, &mp->geom, geom) { 862 sc = gp->softc; 863 if (sc == NULL) 864 continue; 865 if (strcmp(sc->sc_name, name) == 0) 866 return (sc); 867 } 868 return (NULL); 869 } 870 871 static void 872 g_concat_ctl_destroy(struct gctl_req *req, struct g_class *mp) 873 { 874 struct g_concat_softc *sc; 875 int *force, *nargs, error; 876 const char *name; 877 char param[16]; 878 u_int i; 879 880 g_topology_assert(); 881 882 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 883 if (nargs == NULL) { 884 gctl_error(req, "No '%s' argument.", "nargs"); 885 return; 886 } 887 if (*nargs <= 0) { 888 gctl_error(req, "Missing device(s)."); 889 return; 890 } 891 force = gctl_get_paraml(req, "force", sizeof(*force)); 892 if (force == NULL) { 893 gctl_error(req, "No '%s' argument.", "force"); 894 return; 895 } 896 897 for (i = 0; i < (u_int)*nargs; i++) { 898 snprintf(param, sizeof(param), "arg%u", i); 899 name = gctl_get_asciiparam(req, param); 900 if (name == NULL) { 901 gctl_error(req, "No 'arg%u' argument.", i); 902 return; 903 } 904 sc = g_concat_find_device(mp, name); 905 if (sc == NULL) { 906 gctl_error(req, "No such device: %s.", name); 907 return; 908 } 909 error = g_concat_destroy(sc, *force); 910 if (error != 0) { 911 gctl_error(req, "Cannot destroy device %s (error=%d).", 912 sc->sc_name, error); 913 return; 914 } 915 } 916 } 917 918 static void 919 g_concat_config(struct gctl_req *req, struct g_class *mp, const char *verb) 920 { 921 uint32_t *version; 922 923 g_topology_assert(); 924 925 version = gctl_get_paraml(req, "version", sizeof(*version)); 926 if (version == NULL) { 927 gctl_error(req, "No '%s' argument.", "version"); 928 return; 929 } 930 if (*version != G_CONCAT_VERSION) { 931 gctl_error(req, "Userland and kernel parts are out of sync."); 932 return; 933 } 934 935 if (strcmp(verb, "create") == 0) { 936 g_concat_ctl_create(req, mp); 937 return; 938 } else if (strcmp(verb, "destroy") == 0 || 939 strcmp(verb, "stop") == 0) { 940 g_concat_ctl_destroy(req, mp); 941 return; 942 } 943 gctl_error(req, "Unknown verb."); 944 } 945 946 static void 947 g_concat_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 948 struct g_consumer *cp, struct g_provider *pp) 949 { 950 struct g_concat_softc *sc; 951 952 g_topology_assert(); 953 sc = gp->softc; 954 if (sc == NULL) 955 return; 956 if (pp != NULL) { 957 /* Nothing here. */ 958 } else if (cp != NULL) { 959 struct g_concat_disk *disk; 960 961 disk = cp->private; 962 if (disk == NULL) 963 return; 964 sbuf_printf(sb, "%s<End>%jd</End>\n", indent, 965 (intmax_t)disk->d_end); 966 sbuf_printf(sb, "%s<Start>%jd</Start>\n", indent, 967 (intmax_t)disk->d_start); 968 } else { 969 sbuf_printf(sb, "%s<ID>%u</ID>\n", indent, (u_int)sc->sc_id); 970 sbuf_printf(sb, "%s<Type>", indent); 971 switch (sc->sc_type) { 972 case G_CONCAT_TYPE_AUTOMATIC: 973 sbuf_printf(sb, "AUTOMATIC"); 974 break; 975 case G_CONCAT_TYPE_MANUAL: 976 sbuf_printf(sb, "MANUAL"); 977 break; 978 default: 979 sbuf_printf(sb, "UNKNOWN"); 980 break; 981 } 982 sbuf_printf(sb, "</Type>\n"); 983 sbuf_printf(sb, "%s<Status>Total=%u, Online=%u</Status>\n", 984 indent, sc->sc_ndisks, g_concat_nvalid(sc)); 985 sbuf_printf(sb, "%s<State>", indent); 986 if (sc->sc_provider != NULL && sc->sc_provider->error == 0) 987 sbuf_printf(sb, "UP"); 988 else 989 sbuf_printf(sb, "DOWN"); 990 sbuf_printf(sb, "</State>\n"); 991 } 992 } 993 994 DECLARE_GEOM_CLASS(g_concat_class, g_concat);
Cache object: ace7408e2444df278c1d0075f749bce8
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