g_concat.c revision 200942
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 200942 2009-12-24 14:32:21Z mav $"); 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 struct g_provider *pp; 351 u_int no, sectorsize = 0; 352 off_t start; 353 354 if (g_concat_nvalid(sc) != sc->sc_ndisks) 355 return; 356 357 pp = g_new_providerf(sc->sc_geom, "concat/%s", 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 pp->sectorsize = sectorsize; 375 /* We have sc->sc_disks[sc->sc_ndisks - 1].d_end in 'start'. */ 376 pp->mediasize = start; 377 pp->stripesize = sc->sc_disks[0].d_consumer->provider->stripesize; 378 pp->stripeoffset = sc->sc_disks[0].d_consumer->provider->stripeoffset; 379 sc->sc_provider = pp; 380 g_error_provider(pp, 0); 381 382 G_CONCAT_DEBUG(0, "Device %s activated.", sc->sc_name); 383} 384 385static int 386g_concat_read_metadata(struct g_consumer *cp, struct g_concat_metadata *md) 387{ 388 struct g_provider *pp; 389 u_char *buf; 390 int error; 391 392 g_topology_assert(); 393 394 error = g_access(cp, 1, 0, 0); 395 if (error != 0) 396 return (error); 397 pp = cp->provider; 398 g_topology_unlock(); 399 buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize, 400 &error); 401 g_topology_lock(); 402 g_access(cp, -1, 0, 0); 403 if (buf == NULL) 404 return (error); 405 406 /* Decode metadata. */ 407 concat_metadata_decode(buf, md); 408 g_free(buf); 409 410 return (0); 411} 412 413/* 414 * Add disk to given device. 415 */ 416static int 417g_concat_add_disk(struct g_concat_softc *sc, struct g_provider *pp, u_int no) 418{ 419 struct g_concat_disk *disk; 420 struct g_consumer *cp, *fcp; 421 struct g_geom *gp; 422 int error; 423 424 /* Metadata corrupted? */ 425 if (no >= sc->sc_ndisks) 426 return (EINVAL); 427 428 disk = &sc->sc_disks[no]; 429 /* Check if disk is not already attached. */ 430 if (disk->d_consumer != NULL) 431 return (EEXIST); 432 433 gp = sc->sc_geom; 434 fcp = LIST_FIRST(&gp->consumer); 435 436 cp = g_new_consumer(gp); 437 error = g_attach(cp, pp); 438 if (error != 0) { 439 g_destroy_consumer(cp); 440 return (error); 441 } 442 443 if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0)) { 444 error = g_access(cp, fcp->acr, fcp->acw, fcp->ace); 445 if (error != 0) { 446 g_detach(cp); 447 g_destroy_consumer(cp); 448 return (error); 449 } 450 } 451 if (sc->sc_type == G_CONCAT_TYPE_AUTOMATIC) { 452 struct g_concat_metadata md; 453 454 /* Re-read metadata. */ 455 error = g_concat_read_metadata(cp, &md); 456 if (error != 0) 457 goto fail; 458 459 if (strcmp(md.md_magic, G_CONCAT_MAGIC) != 0 || 460 strcmp(md.md_name, sc->sc_name) != 0 || 461 md.md_id != sc->sc_id) { 462 G_CONCAT_DEBUG(0, "Metadata on %s changed.", pp->name); 463 goto fail; 464 } 465 } 466 467 cp->private = disk; 468 disk->d_consumer = cp; 469 disk->d_softc = sc; 470 disk->d_start = 0; /* not yet */ 471 disk->d_end = 0; /* not yet */ 472 473 G_CONCAT_DEBUG(0, "Disk %s attached to %s.", pp->name, sc->sc_name); 474 475 g_concat_check_and_run(sc); 476 477 return (0); 478fail: 479 if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0)) 480 g_access(cp, -fcp->acr, -fcp->acw, -fcp->ace); 481 g_detach(cp); 482 g_destroy_consumer(cp); 483 return (error); 484} 485 486static struct g_geom * 487g_concat_create(struct g_class *mp, const struct g_concat_metadata *md, 488 u_int type) 489{ 490 struct g_concat_softc *sc; 491 struct g_geom *gp; 492 u_int no; 493 494 G_CONCAT_DEBUG(1, "Creating device %s (id=%u).", md->md_name, 495 md->md_id); 496 497 /* One disks is minimum. */ 498 if (md->md_all < 1) 499 return (NULL); 500 501 /* Check for duplicate unit */ 502 LIST_FOREACH(gp, &mp->geom, geom) { 503 sc = gp->softc; 504 if (sc != NULL && strcmp(sc->sc_name, md->md_name) == 0) { 505 G_CONCAT_DEBUG(0, "Device %s already configured.", 506 gp->name); 507 return (NULL); 508 } 509 } 510 gp = g_new_geomf(mp, "%s", md->md_name); 511 gp->softc = NULL; /* for a moment */ 512 513 sc = malloc(sizeof(*sc), M_CONCAT, M_WAITOK | M_ZERO); 514 gp->start = g_concat_start; 515 gp->spoiled = g_concat_orphan; 516 gp->orphan = g_concat_orphan; 517 gp->access = g_concat_access; 518 gp->dumpconf = g_concat_dumpconf; 519 520 sc->sc_id = md->md_id; 521 sc->sc_ndisks = md->md_all; 522 sc->sc_disks = malloc(sizeof(struct g_concat_disk) * sc->sc_ndisks, 523 M_CONCAT, M_WAITOK | M_ZERO); 524 for (no = 0; no < sc->sc_ndisks; no++) 525 sc->sc_disks[no].d_consumer = NULL; 526 sc->sc_type = type; 527 528 gp->softc = sc; 529 sc->sc_geom = gp; 530 sc->sc_provider = NULL; 531 532 G_CONCAT_DEBUG(0, "Device %s created (id=%u).", sc->sc_name, sc->sc_id); 533 534 return (gp); 535} 536 537static int 538g_concat_destroy(struct g_concat_softc *sc, boolean_t force) 539{ 540 struct g_provider *pp; 541 struct g_geom *gp; 542 u_int no; 543 544 g_topology_assert(); 545 546 if (sc == NULL) 547 return (ENXIO); 548 549 pp = sc->sc_provider; 550 if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) { 551 if (force) { 552 G_CONCAT_DEBUG(0, "Device %s is still open, so it " 553 "can't be definitely removed.", pp->name); 554 } else { 555 G_CONCAT_DEBUG(1, 556 "Device %s is still open (r%dw%de%d).", pp->name, 557 pp->acr, pp->acw, pp->ace); 558 return (EBUSY); 559 } 560 } 561 562 for (no = 0; no < sc->sc_ndisks; no++) { 563 if (sc->sc_disks[no].d_consumer != NULL) 564 g_concat_remove_disk(&sc->sc_disks[no]); 565 } 566 567 gp = sc->sc_geom; 568 gp->softc = NULL; 569 KASSERT(sc->sc_provider == NULL, ("Provider still exists? (device=%s)", 570 gp->name)); 571 free(sc->sc_disks, M_CONCAT); 572 free(sc, M_CONCAT); 573 574 pp = LIST_FIRST(&gp->provider); 575 if (pp == NULL || (pp->acr == 0 && pp->acw == 0 && pp->ace == 0)) 576 G_CONCAT_DEBUG(0, "Device %s destroyed.", gp->name); 577 578 g_wither_geom(gp, ENXIO); 579 580 return (0); 581} 582 583static int 584g_concat_destroy_geom(struct gctl_req *req __unused, 585 struct g_class *mp __unused, struct g_geom *gp) 586{ 587 struct g_concat_softc *sc; 588 589 sc = gp->softc; 590 return (g_concat_destroy(sc, 0)); 591} 592 593static struct g_geom * 594g_concat_taste(struct g_class *mp, struct g_provider *pp, int flags __unused) 595{ 596 struct g_concat_metadata md; 597 struct g_concat_softc *sc; 598 struct g_consumer *cp; 599 struct g_geom *gp; 600 int error; 601 602 g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name); 603 g_topology_assert(); 604 605 /* Skip providers that are already open for writing. */ 606 if (pp->acw > 0) 607 return (NULL); 608 609 G_CONCAT_DEBUG(3, "Tasting %s.", pp->name); 610 611 gp = g_new_geomf(mp, "concat:taste"); 612 gp->start = g_concat_start; 613 gp->access = g_concat_access; 614 gp->orphan = g_concat_orphan; 615 cp = g_new_consumer(gp); 616 g_attach(cp, pp); 617 error = g_concat_read_metadata(cp, &md); 618 g_detach(cp); 619 g_destroy_consumer(cp); 620 g_destroy_geom(gp); 621 if (error != 0) 622 return (NULL); 623 gp = NULL; 624 625 if (strcmp(md.md_magic, G_CONCAT_MAGIC) != 0) 626 return (NULL); 627 if (md.md_version > G_CONCAT_VERSION) { 628 printf("geom_concat.ko module is too old to handle %s.\n", 629 pp->name); 630 return (NULL); 631 } 632 /* 633 * Backward compatibility: 634 */ 635 /* There was no md_provider field in earlier versions of metadata. */ 636 if (md.md_version < 3) 637 bzero(md.md_provider, sizeof(md.md_provider)); 638 /* There was no md_provsize field in earlier versions of metadata. */ 639 if (md.md_version < 4) 640 md.md_provsize = pp->mediasize; 641 642 if (md.md_provider[0] != '\0' && strcmp(md.md_provider, pp->name) != 0) 643 return (NULL); 644 if (md.md_provsize != pp->mediasize) 645 return (NULL); 646 647 /* 648 * Let's check if device already exists. 649 */ 650 sc = NULL; 651 LIST_FOREACH(gp, &mp->geom, geom) { 652 sc = gp->softc; 653 if (sc == NULL) 654 continue; 655 if (sc->sc_type != G_CONCAT_TYPE_AUTOMATIC) 656 continue; 657 if (strcmp(md.md_name, sc->sc_name) != 0) 658 continue; 659 if (md.md_id != sc->sc_id) 660 continue; 661 break; 662 } 663 if (gp != NULL) { 664 G_CONCAT_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); 665 error = g_concat_add_disk(sc, pp, md.md_no); 666 if (error != 0) { 667 G_CONCAT_DEBUG(0, 668 "Cannot add disk %s to %s (error=%d).", pp->name, 669 gp->name, error); 670 return (NULL); 671 } 672 } else { 673 gp = g_concat_create(mp, &md, G_CONCAT_TYPE_AUTOMATIC); 674 if (gp == NULL) { 675 G_CONCAT_DEBUG(0, "Cannot create device %s.", 676 md.md_name); 677 return (NULL); 678 } 679 sc = gp->softc; 680 G_CONCAT_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); 681 error = g_concat_add_disk(sc, pp, md.md_no); 682 if (error != 0) { 683 G_CONCAT_DEBUG(0, 684 "Cannot add disk %s to %s (error=%d).", pp->name, 685 gp->name, error); 686 g_concat_destroy(sc, 1); 687 return (NULL); 688 } 689 } 690 691 return (gp); 692} 693 694static void 695g_concat_ctl_create(struct gctl_req *req, struct g_class *mp) 696{ 697 u_int attached, no; 698 struct g_concat_metadata md; 699 struct g_provider *pp; 700 struct g_concat_softc *sc; 701 struct g_geom *gp; 702 struct sbuf *sb; 703 const char *name; 704 char param[16]; 705 int *nargs; 706 707 g_topology_assert(); 708 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 709 if (nargs == NULL) { 710 gctl_error(req, "No '%s' argument.", "nargs"); 711 return; 712 } 713 if (*nargs < 2) { 714 gctl_error(req, "Too few arguments."); 715 return; 716 } 717 718 strlcpy(md.md_magic, G_CONCAT_MAGIC, sizeof(md.md_magic)); 719 md.md_version = G_CONCAT_VERSION; 720 name = gctl_get_asciiparam(req, "arg0"); 721 if (name == NULL) { 722 gctl_error(req, "No 'arg%u' argument.", 0); 723 return; 724 } 725 strlcpy(md.md_name, name, sizeof(md.md_name)); 726 md.md_id = arc4random(); 727 md.md_no = 0; 728 md.md_all = *nargs - 1; 729 bzero(md.md_provider, sizeof(md.md_provider)); 730 /* This field is not important here. */ 731 md.md_provsize = 0; 732 733 /* Check all providers are valid */ 734 for (no = 1; no < *nargs; no++) { 735 snprintf(param, sizeof(param), "arg%u", no); 736 name = gctl_get_asciiparam(req, param); 737 if (name == NULL) { 738 gctl_error(req, "No 'arg%u' argument.", no); 739 return; 740 } 741 if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 742 name += strlen("/dev/"); 743 pp = g_provider_by_name(name); 744 if (pp == NULL) { 745 G_CONCAT_DEBUG(1, "Disk %s is invalid.", name); 746 gctl_error(req, "Disk %s is invalid.", name); 747 return; 748 } 749 } 750 751 gp = g_concat_create(mp, &md, G_CONCAT_TYPE_MANUAL); 752 if (gp == NULL) { 753 gctl_error(req, "Can't configure %s.", md.md_name); 754 return; 755 } 756 757 sc = gp->softc; 758 sb = sbuf_new_auto(); 759 sbuf_printf(sb, "Can't attach disk(s) to %s:", gp->name); 760 for (attached = 0, no = 1; no < *nargs; no++) { 761 snprintf(param, sizeof(param), "arg%u", no); 762 name = gctl_get_asciiparam(req, param); 763 if (name == NULL) { 764 gctl_error(req, "No 'arg%d' argument.", no); 765 return; 766 } 767 if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 768 name += strlen("/dev/"); 769 pp = g_provider_by_name(name); 770 KASSERT(pp != NULL, ("Provider %s disappear?!", name)); 771 if (g_concat_add_disk(sc, pp, no - 1) != 0) { 772 G_CONCAT_DEBUG(1, "Disk %u (%s) not attached to %s.", 773 no, pp->name, gp->name); 774 sbuf_printf(sb, " %s", pp->name); 775 continue; 776 } 777 attached++; 778 } 779 sbuf_finish(sb); 780 if (md.md_all != attached) { 781 g_concat_destroy(gp->softc, 1); 782 gctl_error(req, "%s", sbuf_data(sb)); 783 } 784 sbuf_delete(sb); 785} 786 787static struct g_concat_softc * 788g_concat_find_device(struct g_class *mp, const char *name) 789{ 790 struct g_concat_softc *sc; 791 struct g_geom *gp; 792 793 LIST_FOREACH(gp, &mp->geom, geom) { 794 sc = gp->softc; 795 if (sc == NULL) 796 continue; 797 if (strcmp(sc->sc_name, name) == 0) 798 return (sc); 799 } 800 return (NULL); 801} 802 803static void 804g_concat_ctl_destroy(struct gctl_req *req, struct g_class *mp) 805{ 806 struct g_concat_softc *sc; 807 int *force, *nargs, error; 808 const char *name; 809 char param[16]; 810 u_int i; 811 812 g_topology_assert(); 813 814 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 815 if (nargs == NULL) { 816 gctl_error(req, "No '%s' argument.", "nargs"); 817 return; 818 } 819 if (*nargs <= 0) { 820 gctl_error(req, "Missing device(s)."); 821 return; 822 } 823 force = gctl_get_paraml(req, "force", sizeof(*force)); 824 if (force == NULL) { 825 gctl_error(req, "No '%s' argument.", "force"); 826 return; 827 } 828 829 for (i = 0; i < (u_int)*nargs; i++) { 830 snprintf(param, sizeof(param), "arg%u", i); 831 name = gctl_get_asciiparam(req, param); 832 if (name == NULL) { 833 gctl_error(req, "No 'arg%u' argument.", i); 834 return; 835 } 836 sc = g_concat_find_device(mp, name); 837 if (sc == NULL) { 838 gctl_error(req, "No such device: %s.", name); 839 return; 840 } 841 error = g_concat_destroy(sc, *force); 842 if (error != 0) { 843 gctl_error(req, "Cannot destroy device %s (error=%d).", 844 sc->sc_name, error); 845 return; 846 } 847 } 848} 849 850static void 851g_concat_config(struct gctl_req *req, struct g_class *mp, const char *verb) 852{ 853 uint32_t *version; 854 855 g_topology_assert(); 856 857 version = gctl_get_paraml(req, "version", sizeof(*version)); 858 if (version == NULL) { 859 gctl_error(req, "No '%s' argument.", "version"); 860 return; 861 } 862 if (*version != G_CONCAT_VERSION) { 863 gctl_error(req, "Userland and kernel parts are out of sync."); 864 return; 865 } 866 867 if (strcmp(verb, "create") == 0) { 868 g_concat_ctl_create(req, mp); 869 return; 870 } else if (strcmp(verb, "destroy") == 0 || 871 strcmp(verb, "stop") == 0) { 872 g_concat_ctl_destroy(req, mp); 873 return; 874 } 875 gctl_error(req, "Unknown verb."); 876} 877 878static void 879g_concat_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 880 struct g_consumer *cp, struct g_provider *pp) 881{ 882 struct g_concat_softc *sc; 883 884 g_topology_assert(); 885 sc = gp->softc; 886 if (sc == NULL) 887 return; 888 if (pp != NULL) { 889 /* Nothing here. */ 890 } else if (cp != NULL) { 891 struct g_concat_disk *disk; 892 893 disk = cp->private; 894 if (disk == NULL) 895 return; 896 sbuf_printf(sb, "%s<End>%jd</End>\n", indent, 897 (intmax_t)disk->d_end); 898 sbuf_printf(sb, "%s<Start>%jd</Start>\n", indent, 899 (intmax_t)disk->d_start); 900 } else { 901 sbuf_printf(sb, "%s<ID>%u</ID>\n", indent, (u_int)sc->sc_id); 902 sbuf_printf(sb, "%s<Type>", indent); 903 switch (sc->sc_type) { 904 case G_CONCAT_TYPE_AUTOMATIC: 905 sbuf_printf(sb, "AUTOMATIC"); 906 break; 907 case G_CONCAT_TYPE_MANUAL: 908 sbuf_printf(sb, "MANUAL"); 909 break; 910 default: 911 sbuf_printf(sb, "UNKNOWN"); 912 break; 913 } 914 sbuf_printf(sb, "</Type>\n"); 915 sbuf_printf(sb, "%s<Status>Total=%u, Online=%u</Status>\n", 916 indent, sc->sc_ndisks, g_concat_nvalid(sc)); 917 sbuf_printf(sb, "%s<State>", indent); 918 if (sc->sc_provider != NULL && sc->sc_provider->error == 0) 919 sbuf_printf(sb, "UP"); 920 else 921 sbuf_printf(sb, "DOWN"); 922 sbuf_printf(sb, "</State>\n"); 923 } 924} 925 926DECLARE_GEOM_CLASS(g_concat_class, g_concat); 927