g_concat.c revision 163836
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: head/sys/geom/concat/g_concat.c 163836 2006-10-31 21:23:51Z pjd $"); 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 43static MALLOC_DEFINE(M_CONCAT, "concat_data", "GEOM_CONCAT Data"); 44 45SYSCTL_DECL(_kern_geom); 46SYSCTL_NODE(_kern_geom, OID_AUTO, concat, CTLFLAG_RW, 0, "GEOM_CONCAT stuff"); 47static u_int g_concat_debug = 0; 48TUNABLE_INT("kern.geom.concat.debug", &g_concat_debug); 49SYSCTL_UINT(_kern_geom_concat, OID_AUTO, debug, CTLFLAG_RW, &g_concat_debug, 0, 50 "Debug level"); 51 52static int g_concat_destroy(struct g_concat_softc *sc, boolean_t force); 53static int g_concat_destroy_geom(struct gctl_req *req, struct g_class *mp, 54 struct g_geom *gp); 55 56static g_taste_t g_concat_taste; 57static g_ctl_req_t g_concat_config; 58static g_dumpconf_t g_concat_dumpconf; 59 60struct 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 */ 72static u_int 73gcd(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 */ 88static u_int 89lcm(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 */ 98static u_int 99g_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 112static void 113g_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 139static void 140g_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 162static int 163g_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 214static void 215g_concat_flush(struct g_concat_softc *sc, struct bio *bp) 216{ 217 struct bio_queue_head queue; 218 struct g_consumer *cp; 219 struct bio *cbp; 220 u_int no; 221 222 bioq_init(&queue); 223 for (no = 0; no < sc->sc_ndisks; no++) { 224 cbp = g_clone_bio(bp); 225 if (cbp == NULL) { 226 for (cbp = bioq_first(&queue); cbp != NULL; 227 cbp = bioq_first(&queue)) { 228 bioq_remove(&queue, cbp); 229 g_destroy_bio(cbp); 230 } 231 if (bp->bio_error == 0) 232 bp->bio_error = ENOMEM; 233 g_io_deliver(bp, bp->bio_error); 234 return; 235 } 236 bioq_insert_tail(&queue, cbp); 237 cbp->bio_done = g_std_done; 238 cbp->bio_caller1 = sc->sc_disks[no].d_consumer; 239 cbp->bio_to = sc->sc_disks[no].d_consumer->provider; 240 } 241 for (cbp = bioq_first(&queue); cbp != NULL; cbp = bioq_first(&queue)) { 242 bioq_remove(&queue, cbp); 243 G_CONCAT_LOGREQ(cbp, "Sending request."); 244 cp = cbp->bio_caller1; 245 cbp->bio_caller1 = NULL; 246 g_io_request(cbp, cp); 247 } 248} 249 250static void 251g_concat_start(struct bio *bp) 252{ 253 struct bio_queue_head queue; 254 struct g_concat_softc *sc; 255 struct g_concat_disk *disk; 256 struct g_provider *pp; 257 off_t offset, end, length, off, len; 258 struct bio *cbp; 259 char *addr; 260 u_int no; 261 262 pp = bp->bio_to; 263 sc = pp->geom->softc; 264 /* 265 * If sc == NULL, provider's error should be set and g_concat_start() 266 * should not be called at all. 267 */ 268 KASSERT(sc != NULL, 269 ("Provider's error should be set (error=%d)(device=%s).", 270 bp->bio_to->error, bp->bio_to->name)); 271 272 G_CONCAT_LOGREQ(bp, "Request received."); 273 274 switch (bp->bio_cmd) { 275 case BIO_READ: 276 case BIO_WRITE: 277 case BIO_DELETE: 278 break; 279 case BIO_FLUSH: 280 g_concat_flush(sc, bp); 281 return; 282 case BIO_GETATTR: 283 /* To which provider it should be delivered? */ 284 default: 285 g_io_deliver(bp, EOPNOTSUPP); 286 return; 287 } 288 289 offset = bp->bio_offset; 290 length = bp->bio_length; 291 addr = bp->bio_data; 292 end = offset + length; 293 294 bioq_init(&queue); 295 for (no = 0; no < sc->sc_ndisks; no++) { 296 disk = &sc->sc_disks[no]; 297 if (disk->d_end <= offset) 298 continue; 299 if (disk->d_start >= end) 300 break; 301 302 off = offset - disk->d_start; 303 len = MIN(length, disk->d_end - offset); 304 length -= len; 305 offset += len; 306 307 cbp = g_clone_bio(bp); 308 if (cbp == NULL) { 309 for (cbp = bioq_first(&queue); cbp != NULL; 310 cbp = bioq_first(&queue)) { 311 bioq_remove(&queue, cbp); 312 g_destroy_bio(cbp); 313 } 314 if (bp->bio_error == 0) 315 bp->bio_error = ENOMEM; 316 g_io_deliver(bp, bp->bio_error); 317 return; 318 } 319 bioq_insert_tail(&queue, cbp); 320 /* 321 * Fill in the component buf structure. 322 */ 323 cbp->bio_done = g_std_done; 324 cbp->bio_offset = off; 325 cbp->bio_data = addr; 326 addr += len; 327 cbp->bio_length = len; 328 cbp->bio_to = disk->d_consumer->provider; 329 cbp->bio_caller1 = disk; 330 331 if (length == 0) 332 break; 333 } 334 KASSERT(length == 0, 335 ("Length is still greater than 0 (class=%s, name=%s).", 336 bp->bio_to->geom->class->name, bp->bio_to->geom->name)); 337 for (cbp = bioq_first(&queue); cbp != NULL; cbp = bioq_first(&queue)) { 338 bioq_remove(&queue, cbp); 339 G_CONCAT_LOGREQ(cbp, "Sending request."); 340 disk = cbp->bio_caller1; 341 cbp->bio_caller1 = NULL; 342 g_io_request(cbp, disk->d_consumer); 343 } 344} 345 346static void 347g_concat_check_and_run(struct g_concat_softc *sc) 348{ 349 struct g_concat_disk *disk; 350 u_int no, sectorsize = 0; 351 off_t start; 352 353 if (g_concat_nvalid(sc) != sc->sc_ndisks) 354 return; 355 356 sc->sc_provider = g_new_providerf(sc->sc_geom, "concat/%s", 357 sc->sc_name); 358 start = 0; 359 for (no = 0; no < sc->sc_ndisks; no++) { 360 disk = &sc->sc_disks[no]; 361 disk->d_start = start; 362 disk->d_end = disk->d_start + 363 disk->d_consumer->provider->mediasize; 364 if (sc->sc_type == G_CONCAT_TYPE_AUTOMATIC) 365 disk->d_end -= disk->d_consumer->provider->sectorsize; 366 start = disk->d_end; 367 if (no == 0) 368 sectorsize = disk->d_consumer->provider->sectorsize; 369 else { 370 sectorsize = lcm(sectorsize, 371 disk->d_consumer->provider->sectorsize); 372 } 373 } 374 sc->sc_provider->sectorsize = sectorsize; 375 /* We have sc->sc_disks[sc->sc_ndisks - 1].d_end in 'start'. */ 376 sc->sc_provider->mediasize = start; 377 g_error_provider(sc->sc_provider, 0); 378 379 G_CONCAT_DEBUG(0, "Device %s activated.", sc->sc_name); 380} 381 382static int 383g_concat_read_metadata(struct g_consumer *cp, struct g_concat_metadata *md) 384{ 385 struct g_provider *pp; 386 u_char *buf; 387 int error; 388 389 g_topology_assert(); 390 391 error = g_access(cp, 1, 0, 0); 392 if (error != 0) 393 return (error); 394 pp = cp->provider; 395 g_topology_unlock(); 396 buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize, 397 &error); 398 g_topology_lock(); 399 g_access(cp, -1, 0, 0); 400 if (buf == NULL) 401 return (error); 402 403 /* Decode metadata. */ 404 concat_metadata_decode(buf, md); 405 g_free(buf); 406 407 return (0); 408} 409 410/* 411 * Add disk to given device. 412 */ 413static int 414g_concat_add_disk(struct g_concat_softc *sc, struct g_provider *pp, u_int no) 415{ 416 struct g_concat_disk *disk; 417 struct g_consumer *cp, *fcp; 418 struct g_geom *gp; 419 int error; 420 421 /* Metadata corrupted? */ 422 if (no >= sc->sc_ndisks) 423 return (EINVAL); 424 425 disk = &sc->sc_disks[no]; 426 /* Check if disk is not already attached. */ 427 if (disk->d_consumer != NULL) 428 return (EEXIST); 429 430 gp = sc->sc_geom; 431 fcp = LIST_FIRST(&gp->consumer); 432 433 cp = g_new_consumer(gp); 434 error = g_attach(cp, pp); 435 if (error != 0) { 436 g_destroy_consumer(cp); 437 return (error); 438 } 439 440 if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0)) { 441 error = g_access(cp, fcp->acr, fcp->acw, fcp->ace); 442 if (error != 0) { 443 g_detach(cp); 444 g_destroy_consumer(cp); 445 return (error); 446 } 447 } 448 if (sc->sc_type == G_CONCAT_TYPE_AUTOMATIC) { 449 struct g_concat_metadata md; 450 451 /* Re-read metadata. */ 452 error = g_concat_read_metadata(cp, &md); 453 if (error != 0) 454 goto fail; 455 456 if (strcmp(md.md_magic, G_CONCAT_MAGIC) != 0 || 457 strcmp(md.md_name, sc->sc_name) != 0 || 458 md.md_id != sc->sc_id) { 459 G_CONCAT_DEBUG(0, "Metadata on %s changed.", pp->name); 460 goto fail; 461 } 462 } 463 464 cp->private = disk; 465 disk->d_consumer = cp; 466 disk->d_softc = sc; 467 disk->d_start = 0; /* not yet */ 468 disk->d_end = 0; /* not yet */ 469 470 G_CONCAT_DEBUG(0, "Disk %s attached to %s.", pp->name, sc->sc_name); 471 472 g_concat_check_and_run(sc); 473 474 return (0); 475fail: 476 if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0)) 477 g_access(cp, -fcp->acr, -fcp->acw, -fcp->ace); 478 g_detach(cp); 479 g_destroy_consumer(cp); 480 return (error); 481} 482 483static struct g_geom * 484g_concat_create(struct g_class *mp, const struct g_concat_metadata *md, 485 u_int type) 486{ 487 struct g_concat_softc *sc; 488 struct g_geom *gp; 489 u_int no; 490 491 G_CONCAT_DEBUG(1, "Creating device %s (id=%u).", md->md_name, 492 md->md_id); 493 494 /* One disks is minimum. */ 495 if (md->md_all < 1) 496 return (NULL); 497 498 /* Check for duplicate unit */ 499 LIST_FOREACH(gp, &mp->geom, geom) { 500 sc = gp->softc; 501 if (sc != NULL && strcmp(sc->sc_name, md->md_name) == 0) { 502 G_CONCAT_DEBUG(0, "Device %s already configured.", 503 gp->name); 504 return (NULL); 505 } 506 } 507 gp = g_new_geomf(mp, "%s", md->md_name); 508 gp->softc = NULL; /* for a moment */ 509 510 sc = malloc(sizeof(*sc), M_CONCAT, M_WAITOK | M_ZERO); 511 gp->start = g_concat_start; 512 gp->spoiled = g_concat_orphan; 513 gp->orphan = g_concat_orphan; 514 gp->access = g_concat_access; 515 gp->dumpconf = g_concat_dumpconf; 516 517 sc->sc_id = md->md_id; 518 sc->sc_ndisks = md->md_all; 519 sc->sc_disks = malloc(sizeof(struct g_concat_disk) * sc->sc_ndisks, 520 M_CONCAT, M_WAITOK | M_ZERO); 521 for (no = 0; no < sc->sc_ndisks; no++) 522 sc->sc_disks[no].d_consumer = NULL; 523 sc->sc_type = type; 524 525 gp->softc = sc; 526 sc->sc_geom = gp; 527 sc->sc_provider = NULL; 528 529 G_CONCAT_DEBUG(0, "Device %s created (id=%u).", sc->sc_name, sc->sc_id); 530 531 return (gp); 532} 533 534static int 535g_concat_destroy(struct g_concat_softc *sc, boolean_t force) 536{ 537 struct g_provider *pp; 538 struct g_geom *gp; 539 u_int no; 540 541 g_topology_assert(); 542 543 if (sc == NULL) 544 return (ENXIO); 545 546 pp = sc->sc_provider; 547 if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) { 548 if (force) { 549 G_CONCAT_DEBUG(0, "Device %s is still open, so it " 550 "can't be definitely removed.", pp->name); 551 } else { 552 G_CONCAT_DEBUG(1, 553 "Device %s is still open (r%dw%de%d).", pp->name, 554 pp->acr, pp->acw, pp->ace); 555 return (EBUSY); 556 } 557 } 558 559 for (no = 0; no < sc->sc_ndisks; no++) { 560 if (sc->sc_disks[no].d_consumer != NULL) 561 g_concat_remove_disk(&sc->sc_disks[no]); 562 } 563 564 gp = sc->sc_geom; 565 gp->softc = NULL; 566 KASSERT(sc->sc_provider == NULL, ("Provider still exists? (device=%s)", 567 gp->name)); 568 free(sc->sc_disks, M_CONCAT); 569 free(sc, M_CONCAT); 570 571 pp = LIST_FIRST(&gp->provider); 572 if (pp == NULL || (pp->acr == 0 && pp->acw == 0 && pp->ace == 0)) 573 G_CONCAT_DEBUG(0, "Device %s destroyed.", gp->name); 574 575 g_wither_geom(gp, ENXIO); 576 577 return (0); 578} 579 580static int 581g_concat_destroy_geom(struct gctl_req *req __unused, 582 struct g_class *mp __unused, struct g_geom *gp) 583{ 584 struct g_concat_softc *sc; 585 586 sc = gp->softc; 587 return (g_concat_destroy(sc, 0)); 588} 589 590static struct g_geom * 591g_concat_taste(struct g_class *mp, struct g_provider *pp, int flags __unused) 592{ 593 struct g_concat_metadata md; 594 struct g_concat_softc *sc; 595 struct g_consumer *cp; 596 struct g_geom *gp; 597 int error; 598 599 g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name); 600 g_topology_assert(); 601 602 G_CONCAT_DEBUG(3, "Tasting %s.", pp->name); 603 604 gp = g_new_geomf(mp, "concat:taste"); 605 gp->start = g_concat_start; 606 gp->access = g_concat_access; 607 gp->orphan = g_concat_orphan; 608 cp = g_new_consumer(gp); 609 g_attach(cp, pp); 610 error = g_concat_read_metadata(cp, &md); 611 g_detach(cp); 612 g_destroy_consumer(cp); 613 g_destroy_geom(gp); 614 if (error != 0) 615 return (NULL); 616 gp = NULL; 617 618 if (strcmp(md.md_magic, G_CONCAT_MAGIC) != 0) 619 return (NULL); 620 if (md.md_version > G_CONCAT_VERSION) { 621 printf("geom_concat.ko module is too old to handle %s.\n", 622 pp->name); 623 return (NULL); 624 } 625 /* 626 * Backward compatibility: 627 */ 628 /* There was no md_provider field in earlier versions of metadata. */ 629 if (md.md_version < 3) 630 bzero(md.md_provider, sizeof(md.md_provider)); 631 /* There was no md_provsize field in earlier versions of metadata. */ 632 if (md.md_version < 4) 633 md.md_provsize = pp->mediasize; 634 635 if (md.md_provider[0] != '\0' && strcmp(md.md_provider, pp->name) != 0) 636 return (NULL); 637 if (md.md_provsize != pp->mediasize) 638 return (NULL); 639 640 /* 641 * Let's check if device already exists. 642 */ 643 sc = NULL; 644 LIST_FOREACH(gp, &mp->geom, geom) { 645 sc = gp->softc; 646 if (sc == NULL) 647 continue; 648 if (sc->sc_type != G_CONCAT_TYPE_AUTOMATIC) 649 continue; 650 if (strcmp(md.md_name, sc->sc_name) != 0) 651 continue; 652 if (md.md_id != sc->sc_id) 653 continue; 654 break; 655 } 656 if (gp != NULL) { 657 G_CONCAT_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); 658 error = g_concat_add_disk(sc, pp, md.md_no); 659 if (error != 0) { 660 G_CONCAT_DEBUG(0, 661 "Cannot add disk %s to %s (error=%d).", pp->name, 662 gp->name, error); 663 return (NULL); 664 } 665 } else { 666 gp = g_concat_create(mp, &md, G_CONCAT_TYPE_AUTOMATIC); 667 if (gp == NULL) { 668 G_CONCAT_DEBUG(0, "Cannot create device %s.", 669 md.md_name); 670 return (NULL); 671 } 672 sc = gp->softc; 673 G_CONCAT_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); 674 error = g_concat_add_disk(sc, pp, md.md_no); 675 if (error != 0) { 676 G_CONCAT_DEBUG(0, 677 "Cannot add disk %s to %s (error=%d).", pp->name, 678 gp->name, error); 679 g_concat_destroy(sc, 1); 680 return (NULL); 681 } 682 } 683 684 return (gp); 685} 686 687static void 688g_concat_ctl_create(struct gctl_req *req, struct g_class *mp) 689{ 690 u_int attached, no; 691 struct g_concat_metadata md; 692 struct g_provider *pp; 693 struct g_concat_softc *sc; 694 struct g_geom *gp; 695 struct sbuf *sb; 696 const char *name; 697 char param[16]; 698 int *nargs; 699 700 g_topology_assert(); 701 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 702 if (nargs == NULL) { 703 gctl_error(req, "No '%s' argument.", "nargs"); 704 return; 705 } 706 if (*nargs < 2) { 707 gctl_error(req, "Too few arguments."); 708 return; 709 } 710 711 strlcpy(md.md_magic, G_CONCAT_MAGIC, sizeof(md.md_magic)); 712 md.md_version = G_CONCAT_VERSION; 713 name = gctl_get_asciiparam(req, "arg0"); 714 if (name == NULL) { 715 gctl_error(req, "No 'arg%u' argument.", 0); 716 return; 717 } 718 strlcpy(md.md_name, name, sizeof(md.md_name)); 719 md.md_id = arc4random(); 720 md.md_no = 0; 721 md.md_all = *nargs - 1; 722 bzero(md.md_provider, sizeof(md.md_provider)); 723 /* This field is not important here. */ 724 md.md_provsize = 0; 725 726 /* Check all providers are valid */ 727 for (no = 1; no < *nargs; no++) { 728 snprintf(param, sizeof(param), "arg%u", no); 729 name = gctl_get_asciiparam(req, param); 730 if (name == NULL) { 731 gctl_error(req, "No 'arg%u' argument.", no); 732 return; 733 } 734 if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 735 name += strlen("/dev/"); 736 pp = g_provider_by_name(name); 737 if (pp == NULL) { 738 G_CONCAT_DEBUG(1, "Disk %s is invalid.", name); 739 gctl_error(req, "Disk %s is invalid.", name); 740 return; 741 } 742 } 743 744 gp = g_concat_create(mp, &md, G_CONCAT_TYPE_MANUAL); 745 if (gp == NULL) { 746 gctl_error(req, "Can't configure %s.", md.md_name); 747 return; 748 } 749 750 sc = gp->softc; 751 sb = sbuf_new(NULL, NULL, 0, SBUF_AUTOEXTEND); 752 sbuf_printf(sb, "Can't attach disk(s) to %s:", gp->name); 753 for (attached = 0, no = 1; no < *nargs; no++) { 754 snprintf(param, sizeof(param), "arg%u", no); 755 name = gctl_get_asciiparam(req, param); 756 if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 757 name += strlen("/dev/"); 758 pp = g_provider_by_name(name); 759 KASSERT(pp != NULL, ("Provider %s disappear?!", name)); 760 if (g_concat_add_disk(sc, pp, no - 1) != 0) { 761 G_CONCAT_DEBUG(1, "Disk %u (%s) not attached to %s.", 762 no, pp->name, gp->name); 763 sbuf_printf(sb, " %s", pp->name); 764 continue; 765 } 766 attached++; 767 } 768 sbuf_finish(sb); 769 if (md.md_all != attached) { 770 g_concat_destroy(gp->softc, 1); 771 gctl_error(req, "%s", sbuf_data(sb)); 772 } 773 sbuf_delete(sb); 774} 775 776static struct g_concat_softc * 777g_concat_find_device(struct g_class *mp, const char *name) 778{ 779 struct g_concat_softc *sc; 780 struct g_geom *gp; 781 782 LIST_FOREACH(gp, &mp->geom, geom) { 783 sc = gp->softc; 784 if (sc == NULL) 785 continue; 786 if (strcmp(sc->sc_name, name) == 0) 787 return (sc); 788 } 789 return (NULL); 790} 791 792static void 793g_concat_ctl_destroy(struct gctl_req *req, struct g_class *mp) 794{ 795 struct g_concat_softc *sc; 796 int *force, *nargs, error; 797 const char *name; 798 char param[16]; 799 u_int i; 800 801 g_topology_assert(); 802 803 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 804 if (nargs == NULL) { 805 gctl_error(req, "No '%s' argument.", "nargs"); 806 return; 807 } 808 if (*nargs <= 0) { 809 gctl_error(req, "Missing device(s)."); 810 return; 811 } 812 force = gctl_get_paraml(req, "force", sizeof(*force)); 813 if (force == NULL) { 814 gctl_error(req, "No '%s' argument.", "force"); 815 return; 816 } 817 818 for (i = 0; i < (u_int)*nargs; i++) { 819 snprintf(param, sizeof(param), "arg%u", i); 820 name = gctl_get_asciiparam(req, param); 821 if (name == NULL) { 822 gctl_error(req, "No 'arg%u' argument.", i); 823 return; 824 } 825 sc = g_concat_find_device(mp, name); 826 if (sc == NULL) { 827 gctl_error(req, "No such device: %s.", name); 828 return; 829 } 830 error = g_concat_destroy(sc, *force); 831 if (error != 0) { 832 gctl_error(req, "Cannot destroy device %s (error=%d).", 833 sc->sc_name, error); 834 return; 835 } 836 } 837} 838 839static void 840g_concat_config(struct gctl_req *req, struct g_class *mp, const char *verb) 841{ 842 uint32_t *version; 843 844 g_topology_assert(); 845 846 version = gctl_get_paraml(req, "version", sizeof(*version)); 847 if (version == NULL) { 848 gctl_error(req, "No '%s' argument.", "version"); 849 return; 850 } 851 if (*version != G_CONCAT_VERSION) { 852 gctl_error(req, "Userland and kernel parts are out of sync."); 853 return; 854 } 855 856 if (strcmp(verb, "create") == 0) { 857 g_concat_ctl_create(req, mp); 858 return; 859 } else if (strcmp(verb, "destroy") == 0 || 860 strcmp(verb, "stop") == 0) { 861 g_concat_ctl_destroy(req, mp); 862 return; 863 } 864 gctl_error(req, "Unknown verb."); 865} 866 867static void 868g_concat_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 869 struct g_consumer *cp, struct g_provider *pp) 870{ 871 struct g_concat_softc *sc; 872 873 g_topology_assert(); 874 sc = gp->softc; 875 if (sc == NULL) 876 return; 877 if (pp != NULL) { 878 /* Nothing here. */ 879 } else if (cp != NULL) { 880 struct g_concat_disk *disk; 881 882 disk = cp->private; 883 if (disk == NULL) 884 return; 885 sbuf_printf(sb, "%s<End>%jd</End>\n", indent, 886 (intmax_t)disk->d_end); 887 sbuf_printf(sb, "%s<Start>%jd</Start>\n", indent, 888 (intmax_t)disk->d_start); 889 } else { 890 sbuf_printf(sb, "%s<ID>%u</ID>\n", indent, (u_int)sc->sc_id); 891 sbuf_printf(sb, "%s<Type>", indent); 892 switch (sc->sc_type) { 893 case G_CONCAT_TYPE_AUTOMATIC: 894 sbuf_printf(sb, "AUTOMATIC"); 895 break; 896 case G_CONCAT_TYPE_MANUAL: 897 sbuf_printf(sb, "MANUAL"); 898 break; 899 default: 900 sbuf_printf(sb, "UNKNOWN"); 901 break; 902 } 903 sbuf_printf(sb, "</Type>\n"); 904 sbuf_printf(sb, "%s<Status>Total=%u, Online=%u</Status>\n", 905 indent, sc->sc_ndisks, g_concat_nvalid(sc)); 906 sbuf_printf(sb, "%s<State>", indent); 907 if (sc->sc_provider != NULL && sc->sc_provider->error == 0) 908 sbuf_printf(sb, "UP"); 909 else 910 sbuf_printf(sb, "DOWN"); 911 sbuf_printf(sb, "</State>\n"); 912 } 913} 914 915DECLARE_GEOM_CLASS(g_concat_class, g_concat); 916