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/sysctl.h> 38 #include <sys/malloc.h> 39 #include <geom/geom.h> 40 #include <geom/concat/g_concat.h> 41 42 43 static MALLOC_DEFINE(M_CONCAT, "concat_data", "GEOM_CONCAT Data"); 44 45 SYSCTL_DECL(_kern_geom); 46 SYSCTL_NODE(_kern_geom, OID_AUTO, concat, CTLFLAG_RW, 0, "GEOM_CONCAT stuff"); 47 static u_int g_concat_debug = 0; 48 TUNABLE_INT("kern.geom.concat.debug", &g_concat_debug); 49 SYSCTL_UINT(_kern_geom_concat, OID_AUTO, debug, CTLFLAG_RW, &g_concat_debug, 0, 50 "Debug level"); 51 52 static int g_concat_destroy(struct g_concat_softc *sc, boolean_t force); 53 static int g_concat_destroy_geom(struct gctl_req *req, struct g_class *mp, 54 struct g_geom *gp); 55 56 static g_taste_t g_concat_taste; 57 static g_ctl_req_t g_concat_config; 58 static g_dumpconf_t g_concat_dumpconf; 59 60 struct g_class g_concat_class = { 61 .name = G_CONCAT_CLASS_NAME, 62 .version = G_VERSION, 63 .ctlreq = g_concat_config, 64 .taste = g_concat_taste, 65 .destroy_geom = g_concat_destroy_geom 66 }; 67 68 69 /* 70 * Greatest Common Divisor. 71 */ 72 static u_int 73 gcd(u_int a, u_int b) 74 { 75 u_int c; 76 77 while (b != 0) { 78 c = a; 79 a = b; 80 b = (c % b); 81 } 82 return (a); 83 } 84 85 /* 86 * Least Common Multiple. 87 */ 88 static u_int 89 lcm(u_int a, u_int b) 90 { 91 92 return ((a * b) / gcd(a, b)); 93 } 94 95 /* 96 * Return the number of valid disks. 97 */ 98 static u_int 99 g_concat_nvalid(struct g_concat_softc *sc) 100 { 101 u_int i, no; 102 103 no = 0; 104 for (i = 0; i < sc->sc_ndisks; i++) { 105 if (sc->sc_disks[i].d_consumer != NULL) 106 no++; 107 } 108 109 return (no); 110 } 111 112 static void 113 g_concat_remove_disk(struct g_concat_disk *disk) 114 { 115 struct g_consumer *cp; 116 struct g_concat_softc *sc; 117 118 KASSERT(disk->d_consumer != NULL, ("Non-valid disk in %s.", __func__)); 119 sc = disk->d_softc; 120 cp = disk->d_consumer; 121 122 G_CONCAT_DEBUG(0, "Disk %s removed from %s.", cp->provider->name, 123 sc->sc_name); 124 125 disk->d_consumer = NULL; 126 if (sc->sc_provider != NULL) { 127 sc->sc_provider->flags |= G_PF_WITHER; 128 g_orphan_provider(sc->sc_provider, ENXIO); 129 sc->sc_provider = NULL; 130 G_CONCAT_DEBUG(0, "Device %s removed.", sc->sc_name); 131 } 132 133 if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0) 134 g_access(cp, -cp->acr, -cp->acw, -cp->ace); 135 g_detach(cp); 136 g_destroy_consumer(cp); 137 } 138 139 static void 140 g_concat_orphan(struct g_consumer *cp) 141 { 142 struct g_concat_softc *sc; 143 struct g_concat_disk *disk; 144 struct g_geom *gp; 145 146 g_topology_assert(); 147 gp = cp->geom; 148 sc = gp->softc; 149 if (sc == NULL) 150 return; 151 152 disk = cp->private; 153 if (disk == NULL) /* Possible? */ 154 return; 155 g_concat_remove_disk(disk); 156 157 /* If there are no valid disks anymore, remove device. */ 158 if (g_concat_nvalid(sc) == 0) 159 g_concat_destroy(sc, 1); 160 } 161 162 static int 163 g_concat_access(struct g_provider *pp, int dr, int dw, int de) 164 { 165 struct g_consumer *cp1, *cp2; 166 struct g_concat_softc *sc; 167 struct g_geom *gp; 168 int error; 169 170 gp = pp->geom; 171 sc = gp->softc; 172 173 if (sc == NULL) { 174 /* 175 * It looks like geom is being withered. 176 * In that case we allow only negative requests. 177 */ 178 KASSERT(dr <= 0 && dw <= 0 && de <= 0, 179 ("Positive access request (device=%s).", pp->name)); 180 if ((pp->acr + dr) == 0 && (pp->acw + dw) == 0 && 181 (pp->ace + de) == 0) { 182 G_CONCAT_DEBUG(0, "Device %s definitely destroyed.", 183 gp->name); 184 } 185 return (0); 186 } 187 188 /* On first open, grab an extra "exclusive" bit */ 189 if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0) 190 de++; 191 /* ... and let go of it on last close */ 192 if ((pp->acr + dr) == 0 && (pp->acw + dw) == 0 && (pp->ace + de) == 0) 193 de--; 194 195 error = ENXIO; 196 LIST_FOREACH(cp1, &gp->consumer, consumer) { 197 error = g_access(cp1, dr, dw, de); 198 if (error == 0) 199 continue; 200 /* 201 * If we fail here, backout all previous changes. 202 */ 203 LIST_FOREACH(cp2, &gp->consumer, consumer) { 204 if (cp1 == cp2) 205 return (error); 206 g_access(cp2, -dr, -dw, -de); 207 } 208 /* NOTREACHED */ 209 } 210 211 return (error); 212 } 213 214 static void 215 g_concat_start(struct bio *bp) 216 { 217 struct bio_queue_head queue; 218 struct g_concat_softc *sc; 219 struct g_concat_disk *disk; 220 struct g_provider *pp; 221 off_t offset, end, length, off, len; 222 struct bio *cbp; 223 char *addr; 224 u_int no; 225 226 pp = bp->bio_to; 227 sc = pp->geom->softc; 228 /* 229 * If sc == NULL, provider's error should be set and g_concat_start() 230 * should not be called at all. 231 */ 232 KASSERT(sc != NULL, 233 ("Provider's error should be set (error=%d)(device=%s).", 234 bp->bio_to->error, bp->bio_to->name)); 235 236 G_CONCAT_LOGREQ(bp, "Request received."); 237 238 switch (bp->bio_cmd) { 239 case BIO_READ: 240 case BIO_WRITE: 241 case BIO_DELETE: 242 break; 243 case BIO_GETATTR: 244 /* To which provider it should be delivered? */ 245 default: 246 g_io_deliver(bp, EOPNOTSUPP); 247 return; 248 } 249 250 offset = bp->bio_offset; 251 length = bp->bio_length; 252 addr = bp->bio_data; 253 end = offset + length; 254 255 bioq_init(&queue); 256 for (no = 0; no < sc->sc_ndisks; no++) { 257 disk = &sc->sc_disks[no]; 258 if (disk->d_end <= offset) 259 continue; 260 if (disk->d_start >= end) 261 break; 262 263 off = offset - disk->d_start; 264 len = MIN(length, disk->d_end - offset); 265 length -= len; 266 offset += len; 267 268 cbp = g_clone_bio(bp); 269 if (cbp == NULL) { 270 for (cbp = bioq_first(&queue); cbp != NULL; 271 cbp = bioq_first(&queue)) { 272 bioq_remove(&queue, cbp); 273 g_destroy_bio(cbp); 274 } 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 /* 282 * Fill in the component buf structure. 283 */ 284 cbp->bio_done = g_std_done; 285 cbp->bio_offset = off; 286 cbp->bio_data = addr; 287 addr += len; 288 cbp->bio_length = len; 289 cbp->bio_to = disk->d_consumer->provider; 290 cbp->bio_caller1 = disk; 291 292 if (length == 0) 293 break; 294 } 295 KASSERT(length == 0, 296 ("Length is still greater than 0 (class=%s, name=%s).", 297 bp->bio_to->geom->class->name, bp->bio_to->geom->name)); 298 for (cbp = bioq_first(&queue); cbp != NULL; cbp = bioq_first(&queue)) { 299 bioq_remove(&queue, cbp); 300 G_CONCAT_LOGREQ(cbp, "Sending request."); 301 disk = cbp->bio_caller1; 302 cbp->bio_caller1 = NULL; 303 g_io_request(cbp, disk->d_consumer); 304 } 305 } 306 307 static void 308 g_concat_check_and_run(struct g_concat_softc *sc) 309 { 310 struct g_concat_disk *disk; 311 u_int no, sectorsize = 0; 312 off_t start; 313 314 if (g_concat_nvalid(sc) != sc->sc_ndisks) 315 return; 316 317 sc->sc_provider = g_new_providerf(sc->sc_geom, "concat/%s", 318 sc->sc_name); 319 start = 0; 320 for (no = 0; no < sc->sc_ndisks; no++) { 321 disk = &sc->sc_disks[no]; 322 disk->d_start = start; 323 disk->d_end = disk->d_start + 324 disk->d_consumer->provider->mediasize; 325 if (sc->sc_type == G_CONCAT_TYPE_AUTOMATIC) 326 disk->d_end -= disk->d_consumer->provider->sectorsize; 327 start = disk->d_end; 328 if (no == 0) 329 sectorsize = disk->d_consumer->provider->sectorsize; 330 else { 331 sectorsize = lcm(sectorsize, 332 disk->d_consumer->provider->sectorsize); 333 } 334 } 335 sc->sc_provider->sectorsize = sectorsize; 336 /* We have sc->sc_disks[sc->sc_ndisks - 1].d_end in 'start'. */ 337 sc->sc_provider->mediasize = start; 338 g_error_provider(sc->sc_provider, 0); 339 340 G_CONCAT_DEBUG(0, "Device %s activated.", sc->sc_name); 341 } 342 343 static int 344 g_concat_read_metadata(struct g_consumer *cp, struct g_concat_metadata *md) 345 { 346 struct g_provider *pp; 347 u_char *buf; 348 int error; 349 350 g_topology_assert(); 351 352 error = g_access(cp, 1, 0, 0); 353 if (error != 0) 354 return (error); 355 pp = cp->provider; 356 g_topology_unlock(); 357 buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize, 358 &error); 359 g_topology_lock(); 360 g_access(cp, -1, 0, 0); 361 if (buf == NULL) 362 return (error); 363 364 /* Decode metadata. */ 365 concat_metadata_decode(buf, md); 366 g_free(buf); 367 368 return (0); 369 } 370 371 /* 372 * Add disk to given device. 373 */ 374 static int 375 g_concat_add_disk(struct g_concat_softc *sc, struct g_provider *pp, u_int no) 376 { 377 struct g_concat_disk *disk; 378 struct g_consumer *cp, *fcp; 379 struct g_geom *gp; 380 int error; 381 382 /* Metadata corrupted? */ 383 if (no >= sc->sc_ndisks) 384 return (EINVAL); 385 386 disk = &sc->sc_disks[no]; 387 /* Check if disk is not already attached. */ 388 if (disk->d_consumer != NULL) 389 return (EEXIST); 390 391 gp = sc->sc_geom; 392 fcp = LIST_FIRST(&gp->consumer); 393 394 cp = g_new_consumer(gp); 395 error = g_attach(cp, pp); 396 if (error != 0) { 397 g_destroy_consumer(cp); 398 return (error); 399 } 400 401 if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0)) { 402 error = g_access(cp, fcp->acr, fcp->acw, fcp->ace); 403 if (error != 0) { 404 g_detach(cp); 405 g_destroy_consumer(cp); 406 return (error); 407 } 408 } 409 if (sc->sc_type == G_CONCAT_TYPE_AUTOMATIC) { 410 struct g_concat_metadata md; 411 412 /* Re-read metadata. */ 413 error = g_concat_read_metadata(cp, &md); 414 if (error != 0) 415 goto fail; 416 417 if (strcmp(md.md_magic, G_CONCAT_MAGIC) != 0 || 418 strcmp(md.md_name, sc->sc_name) != 0 || 419 md.md_id != sc->sc_id) { 420 G_CONCAT_DEBUG(0, "Metadata on %s changed.", pp->name); 421 goto fail; 422 } 423 } 424 425 cp->private = disk; 426 disk->d_consumer = cp; 427 disk->d_softc = sc; 428 disk->d_start = 0; /* not yet */ 429 disk->d_end = 0; /* not yet */ 430 431 G_CONCAT_DEBUG(0, "Disk %s attached to %s.", pp->name, sc->sc_name); 432 433 g_concat_check_and_run(sc); 434 435 return (0); 436 fail: 437 if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0)) 438 g_access(cp, -fcp->acr, -fcp->acw, -fcp->ace); 439 g_detach(cp); 440 g_destroy_consumer(cp); 441 return (error); 442 } 443 444 static struct g_geom * 445 g_concat_create(struct g_class *mp, const struct g_concat_metadata *md, 446 u_int type) 447 { 448 struct g_concat_softc *sc; 449 struct g_geom *gp; 450 u_int no; 451 452 G_CONCAT_DEBUG(1, "Creating device %s (id=%u).", md->md_name, 453 md->md_id); 454 455 /* One disks is minimum. */ 456 if (md->md_all < 1) 457 return (NULL); 458 459 /* Check for duplicate unit */ 460 LIST_FOREACH(gp, &mp->geom, geom) { 461 sc = gp->softc; 462 if (sc != NULL && strcmp(sc->sc_name, md->md_name) == 0) { 463 G_CONCAT_DEBUG(0, "Device %s already configured.", 464 gp->name); 465 return (NULL); 466 } 467 } 468 gp = g_new_geomf(mp, "%s", md->md_name); 469 gp->softc = NULL; /* for a moment */ 470 471 sc = malloc(sizeof(*sc), M_CONCAT, M_WAITOK | M_ZERO); 472 gp->start = g_concat_start; 473 gp->spoiled = g_concat_orphan; 474 gp->orphan = g_concat_orphan; 475 gp->access = g_concat_access; 476 gp->dumpconf = g_concat_dumpconf; 477 478 sc->sc_id = md->md_id; 479 sc->sc_ndisks = md->md_all; 480 sc->sc_disks = malloc(sizeof(struct g_concat_disk) * sc->sc_ndisks, 481 M_CONCAT, M_WAITOK | M_ZERO); 482 for (no = 0; no < sc->sc_ndisks; no++) 483 sc->sc_disks[no].d_consumer = NULL; 484 sc->sc_type = type; 485 486 gp->softc = sc; 487 sc->sc_geom = gp; 488 sc->sc_provider = NULL; 489 490 G_CONCAT_DEBUG(0, "Device %s created (id=%u).", sc->sc_name, sc->sc_id); 491 492 return (gp); 493 } 494 495 static int 496 g_concat_destroy(struct g_concat_softc *sc, boolean_t force) 497 { 498 struct g_provider *pp; 499 struct g_geom *gp; 500 u_int no; 501 502 g_topology_assert(); 503 504 if (sc == NULL) 505 return (ENXIO); 506 507 pp = sc->sc_provider; 508 if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) { 509 if (force) { 510 G_CONCAT_DEBUG(0, "Device %s is still open, so it " 511 "can't be definitely removed.", pp->name); 512 } else { 513 G_CONCAT_DEBUG(1, 514 "Device %s is still open (r%dw%de%d).", pp->name, 515 pp->acr, pp->acw, pp->ace); 516 return (EBUSY); 517 } 518 } 519 520 for (no = 0; no < sc->sc_ndisks; no++) { 521 if (sc->sc_disks[no].d_consumer != NULL) 522 g_concat_remove_disk(&sc->sc_disks[no]); 523 } 524 525 gp = sc->sc_geom; 526 gp->softc = NULL; 527 KASSERT(sc->sc_provider == NULL, ("Provider still exists? (device=%s)", 528 gp->name)); 529 free(sc->sc_disks, M_CONCAT); 530 free(sc, M_CONCAT); 531 532 pp = LIST_FIRST(&gp->provider); 533 if (pp == NULL || (pp->acr == 0 && pp->acw == 0 && pp->ace == 0)) 534 G_CONCAT_DEBUG(0, "Device %s destroyed.", gp->name); 535 536 g_wither_geom(gp, ENXIO); 537 538 return (0); 539 } 540 541 static int 542 g_concat_destroy_geom(struct gctl_req *req __unused, 543 struct g_class *mp __unused, struct g_geom *gp) 544 { 545 struct g_concat_softc *sc; 546 547 sc = gp->softc; 548 return (g_concat_destroy(sc, 0)); 549 } 550 551 static struct g_geom * 552 g_concat_taste(struct g_class *mp, struct g_provider *pp, int flags __unused) 553 { 554 struct g_concat_metadata md; 555 struct g_concat_softc *sc; 556 struct g_consumer *cp; 557 struct g_geom *gp; 558 int error; 559 560 g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name); 561 g_topology_assert(); 562 563 G_CONCAT_DEBUG(3, "Tasting %s.", pp->name); 564 565 gp = g_new_geomf(mp, "concat:taste"); 566 gp->start = g_concat_start; 567 gp->access = g_concat_access; 568 gp->orphan = g_concat_orphan; 569 cp = g_new_consumer(gp); 570 g_attach(cp, pp); 571 error = g_concat_read_metadata(cp, &md); 572 g_detach(cp); 573 g_destroy_consumer(cp); 574 g_destroy_geom(gp); 575 if (error != 0) 576 return (NULL); 577 gp = NULL; 578 579 if (strcmp(md.md_magic, G_CONCAT_MAGIC) != 0) 580 return (NULL); 581 if (md.md_version > G_CONCAT_VERSION) { 582 printf("geom_concat.ko module is too old to handle %s.\n", 583 pp->name); 584 return (NULL); 585 } 586 /* 587 * Backward compatibility: 588 */ 589 /* There was no md_provider field in earlier versions of metadata. */ 590 if (md.md_version < 3) 591 bzero(md.md_provider, sizeof(md.md_provider)); 592 /* There was no md_provsize field in earlier versions of metadata. */ 593 if (md.md_version < 4) 594 md.md_provsize = pp->mediasize; 595 596 if (md.md_provider[0] != '\0' && strcmp(md.md_provider, pp->name) != 0) 597 return (NULL); 598 if (md.md_provsize != pp->mediasize) 599 return (NULL); 600 601 /* 602 * Let's check if device already exists. 603 */ 604 sc = NULL; 605 LIST_FOREACH(gp, &mp->geom, geom) { 606 sc = gp->softc; 607 if (sc == NULL) 608 continue; 609 if (sc->sc_type != G_CONCAT_TYPE_AUTOMATIC) 610 continue; 611 if (strcmp(md.md_name, sc->sc_name) != 0) 612 continue; 613 if (md.md_id != sc->sc_id) 614 continue; 615 break; 616 } 617 if (gp != NULL) { 618 G_CONCAT_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); 619 error = g_concat_add_disk(sc, pp, md.md_no); 620 if (error != 0) { 621 G_CONCAT_DEBUG(0, 622 "Cannot add disk %s to %s (error=%d).", pp->name, 623 gp->name, error); 624 return (NULL); 625 } 626 } else { 627 gp = g_concat_create(mp, &md, G_CONCAT_TYPE_AUTOMATIC); 628 if (gp == NULL) { 629 G_CONCAT_DEBUG(0, "Cannot create device %s.", 630 md.md_name); 631 return (NULL); 632 } 633 sc = gp->softc; 634 G_CONCAT_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); 635 error = g_concat_add_disk(sc, pp, md.md_no); 636 if (error != 0) { 637 G_CONCAT_DEBUG(0, 638 "Cannot add disk %s to %s (error=%d).", pp->name, 639 gp->name, error); 640 g_concat_destroy(sc, 1); 641 return (NULL); 642 } 643 } 644 645 return (gp); 646 } 647 648 static void 649 g_concat_ctl_create(struct gctl_req *req, struct g_class *mp) 650 { 651 u_int attached, no; 652 struct g_concat_metadata md; 653 struct g_provider *pp; 654 struct g_concat_softc *sc; 655 struct g_geom *gp; 656 struct sbuf *sb; 657 const char *name; 658 char param[16]; 659 int *nargs; 660 661 g_topology_assert(); 662 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 663 if (nargs == NULL) { 664 gctl_error(req, "No '%s' argument.", "nargs"); 665 return; 666 } 667 if (*nargs < 2) { 668 gctl_error(req, "Too few arguments."); 669 return; 670 } 671 672 strlcpy(md.md_magic, G_CONCAT_MAGIC, sizeof(md.md_magic)); 673 md.md_version = G_CONCAT_VERSION; 674 name = gctl_get_asciiparam(req, "arg0"); 675 if (name == NULL) { 676 gctl_error(req, "No 'arg%u' argument.", 0); 677 return; 678 } 679 strlcpy(md.md_name, name, sizeof(md.md_name)); 680 md.md_id = arc4random(); 681 md.md_no = 0; 682 md.md_all = *nargs - 1; 683 bzero(md.md_provider, sizeof(md.md_provider)); 684 /* This field is not important here. */ 685 md.md_provsize = 0; 686 687 /* Check all providers are valid */ 688 for (no = 1; no < *nargs; no++) { 689 snprintf(param, sizeof(param), "arg%u", no); 690 name = gctl_get_asciiparam(req, param); 691 if (name == NULL) { 692 gctl_error(req, "No 'arg%u' argument.", no); 693 return; 694 } 695 if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 696 name += strlen("/dev/"); 697 pp = g_provider_by_name(name); 698 if (pp == NULL) { 699 G_CONCAT_DEBUG(1, "Disk %s is invalid.", name); 700 gctl_error(req, "Disk %s is invalid.", name); 701 return; 702 } 703 } 704 705 gp = g_concat_create(mp, &md, G_CONCAT_TYPE_MANUAL); 706 if (gp == NULL) { 707 gctl_error(req, "Can't configure %s.", md.md_name); 708 return; 709 } 710 711 sc = gp->softc; 712 sb = sbuf_new(NULL, NULL, 0, SBUF_AUTOEXTEND); 713 sbuf_printf(sb, "Can't attach disk(s) to %s:", gp->name); 714 for (attached = 0, no = 1; no < *nargs; no++) { 715 snprintf(param, sizeof(param), "arg%u", no); 716 name = gctl_get_asciiparam(req, param); 717 if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 718 name += strlen("/dev/"); 719 pp = g_provider_by_name(name); 720 KASSERT(pp != NULL, ("Provider %s disappear?!", name)); 721 if (g_concat_add_disk(sc, pp, no - 1) != 0) { 722 G_CONCAT_DEBUG(1, "Disk %u (%s) not attached to %s.", 723 no, pp->name, gp->name); 724 sbuf_printf(sb, " %s", pp->name); 725 continue; 726 } 727 attached++; 728 } 729 sbuf_finish(sb); 730 if (md.md_all != attached) { 731 g_concat_destroy(gp->softc, 1); 732 gctl_error(req, "%s", sbuf_data(sb)); 733 } 734 sbuf_delete(sb); 735 } 736 737 static struct g_concat_softc * 738 g_concat_find_device(struct g_class *mp, const char *name) 739 { 740 struct g_concat_softc *sc; 741 struct g_geom *gp; 742 743 LIST_FOREACH(gp, &mp->geom, geom) { 744 sc = gp->softc; 745 if (sc == NULL) 746 continue; 747 if (strcmp(sc->sc_name, name) == 0) 748 return (sc); 749 } 750 return (NULL); 751 } 752 753 static void 754 g_concat_ctl_destroy(struct gctl_req *req, struct g_class *mp) 755 { 756 struct g_concat_softc *sc; 757 int *force, *nargs, error; 758 const char *name; 759 char param[16]; 760 u_int i; 761 762 g_topology_assert(); 763 764 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 765 if (nargs == NULL) { 766 gctl_error(req, "No '%s' argument.", "nargs"); 767 return; 768 } 769 if (*nargs <= 0) { 770 gctl_error(req, "Missing device(s)."); 771 return; 772 } 773 force = gctl_get_paraml(req, "force", sizeof(*force)); 774 if (force == NULL) { 775 gctl_error(req, "No '%s' argument.", "force"); 776 return; 777 } 778 779 for (i = 0; i < (u_int)*nargs; i++) { 780 snprintf(param, sizeof(param), "arg%u", i); 781 name = gctl_get_asciiparam(req, param); 782 if (name == NULL) { 783 gctl_error(req, "No 'arg%u' argument.", i); 784 return; 785 } 786 sc = g_concat_find_device(mp, name); 787 if (sc == NULL) { 788 gctl_error(req, "No such device: %s.", name); 789 return; 790 } 791 error = g_concat_destroy(sc, *force); 792 if (error != 0) { 793 gctl_error(req, "Cannot destroy device %s (error=%d).", 794 sc->sc_name, error); 795 return; 796 } 797 } 798 } 799 800 static void 801 g_concat_config(struct gctl_req *req, struct g_class *mp, const char *verb) 802 { 803 uint32_t *version; 804 805 g_topology_assert(); 806 807 version = gctl_get_paraml(req, "version", sizeof(*version)); 808 if (version == NULL) { 809 gctl_error(req, "No '%s' argument.", "version"); 810 return; 811 } 812 if (*version != G_CONCAT_VERSION) { 813 gctl_error(req, "Userland and kernel parts are out of sync."); 814 return; 815 } 816 817 if (strcmp(verb, "create") == 0) { 818 g_concat_ctl_create(req, mp); 819 return; 820 } else if (strcmp(verb, "destroy") == 0 || 821 strcmp(verb, "stop") == 0) { 822 g_concat_ctl_destroy(req, mp); 823 return; 824 } 825 gctl_error(req, "Unknown verb."); 826 } 827 828 static void 829 g_concat_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 830 struct g_consumer *cp, struct g_provider *pp) 831 { 832 struct g_concat_softc *sc; 833 834 g_topology_assert(); 835 sc = gp->softc; 836 if (sc == NULL) 837 return; 838 if (pp != NULL) { 839 /* Nothing here. */ 840 } else if (cp != NULL) { 841 struct g_concat_disk *disk; 842 843 disk = cp->private; 844 if (disk == NULL) 845 return; 846 sbuf_printf(sb, "%s<End>%jd</End>\n", indent, 847 (intmax_t)disk->d_end); 848 sbuf_printf(sb, "%s<Start>%jd</Start>\n", indent, 849 (intmax_t)disk->d_start); 850 } else { 851 sbuf_printf(sb, "%s<ID>%u</ID>\n", indent, (u_int)sc->sc_id); 852 sbuf_printf(sb, "%s<Type>", indent); 853 switch (sc->sc_type) { 854 case G_CONCAT_TYPE_AUTOMATIC: 855 sbuf_printf(sb, "AUTOMATIC"); 856 break; 857 case G_CONCAT_TYPE_MANUAL: 858 sbuf_printf(sb, "MANUAL"); 859 break; 860 default: 861 sbuf_printf(sb, "UNKNOWN"); 862 break; 863 } 864 sbuf_printf(sb, "</Type>\n"); 865 sbuf_printf(sb, "%s<Status>Total=%u, Online=%u</Status>\n", 866 indent, sc->sc_ndisks, g_concat_nvalid(sc)); 867 sbuf_printf(sb, "%s<State>", indent); 868 if (sc->sc_provider != NULL && sc->sc_provider->error == 0) 869 sbuf_printf(sb, "UP"); 870 else 871 sbuf_printf(sb, "DOWN"); 872 sbuf_printf(sb, "</State>\n"); 873 } 874 } 875 876 DECLARE_GEOM_CLASS(g_concat_class, g_concat); 877