g_concat.c revision 129478
18876Srgrimes/*- 24Srgrimes * Copyright (c) 2004 Pawel Jakub Dawidek <pjd@FreeBSD.org> 34Srgrimes * All rights reserved. 44Srgrimes * 58876Srgrimes * Redistribution and use in source and binary forms, with or without 64Srgrimes * modification, are permitted provided that the following conditions 74Srgrimes * are met: 84Srgrimes * 1. Redistributions of source code must retain the above copyright 94Srgrimes * notice, this list of conditions and the following disclaimer. 104Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 118876Srgrimes * notice, this list of conditions and the following disclaimer in the 128876Srgrimes * documentation and/or other materials provided with the distribution. 134Srgrimes * 144Srgrimes * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 158876Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 164Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 178876Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 184Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 194Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 204Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 214Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 228876Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 234Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 244Srgrimes * SUCH DAMAGE. 254Srgrimes */ 268876Srgrimes 274Srgrimes#include <sys/cdefs.h> 28623Srgrimes__FBSDID("$FreeBSD: head/sys/geom/concat/g_concat.c 129478 2004-05-20 10:40:18Z pjd $"); 294Srgrimes 304Srgrimes#include <sys/param.h> 314Srgrimes#include <sys/systm.h> 324Srgrimes#include <sys/kernel.h> 334Srgrimes#include <sys/module.h> 344Srgrimes#include <sys/lock.h> 354Srgrimes#include <sys/mutex.h> 362056Swollman#include <sys/bio.h> 372056Swollman#include <sys/sysctl.h> 382056Swollman#include <sys/malloc.h> 392056Swollman#include <geom/geom.h> 404Srgrimes#include <geom/concat/g_concat.h> 414Srgrimes 424Srgrimes 434Srgrimesstatic MALLOC_DEFINE(M_CONCAT, "concat data", "GEOM_CONCAT Data"); 444Srgrimes 454SrgrimesSYSCTL_DECL(_kern_geom); 464SrgrimesSYSCTL_NODE(_kern_geom, OID_AUTO, concat, CTLFLAG_RW, 0, "GEOM_CONCAT stuff"); 474Srgrimesstatic u_int g_concat_debug = 0; 484SrgrimesSYSCTL_UINT(_kern_geom_concat, OID_AUTO, debug, CTLFLAG_RW, &g_concat_debug, 0, 494Srgrimes "Debug level"); 504Srgrimes 514Srgrimesstatic int g_concat_destroy(struct g_concat_softc *sc, boolean_t force); 524Srgrimesstatic int g_concat_destroy_geom(struct gctl_req *req, struct g_class *mp, 534Srgrimes struct g_geom *gp); 544Srgrimes 554Srgrimesstatic g_taste_t g_concat_taste; 564Srgrimesstatic g_ctl_req_t g_concat_config; 574Srgrimesstatic g_dumpconf_t g_concat_dumpconf; 584Srgrimes 594Srgrimesstruct g_class g_concat_class = { 604Srgrimes .name = G_CONCAT_CLASS_NAME, 614Srgrimes .ctlreq = g_concat_config, 624Srgrimes .taste = g_concat_taste, 634Srgrimes .destroy_geom = g_concat_destroy_geom 644Srgrimes}; 654Srgrimes 664Srgrimes 674Srgrimes/* 684Srgrimes * Greatest Common Divisor. 694Srgrimes */ 704Srgrimesstatic u_int 714Srgrimesgcd(u_int a, u_int b) 724Srgrimes{ 734Srgrimes u_int c; 744Srgrimes 754Srgrimes while (b != 0) { 764Srgrimes c = a; 774Srgrimes a = b; 784Srgrimes b = (c % b); 794Srgrimes } 804Srgrimes return (a); 814Srgrimes} 824Srgrimes 834Srgrimes/* 844Srgrimes * Least Common Multiple. 854Srgrimes */ 864Srgrimesstatic u_int 874Srgrimeslcm(u_int a, u_int b) 884Srgrimes{ 894Srgrimes 904Srgrimes return ((a * b) / gcd(a, b)); 914Srgrimes} 924Srgrimes 934Srgrimes/* 944Srgrimes * Return the number of valid disks. 954Srgrimes */ 964Srgrimesstatic u_int 974Srgrimesg_concat_nvalid(struct g_concat_softc *sc) 984Srgrimes{ 994Srgrimes u_int i, no; 1004Srgrimes 1014Srgrimes no = 0; 1024Srgrimes for (i = 0; i < sc->sc_ndisks; i++) { 1034Srgrimes if (sc->sc_disks[i].d_consumer != NULL) 1044Srgrimes no++; 1054Srgrimes } 1064Srgrimes 1074Srgrimes return (no); 1084Srgrimes} 1094Srgrimes 1104Srgrimesstatic void 1114Srgrimesg_concat_remove_disk(struct g_concat_disk *disk) 1124Srgrimes{ 1134Srgrimes struct g_consumer *cp; 1144Srgrimes struct g_concat_softc *sc; 1154Srgrimes 1164Srgrimes KASSERT(disk->d_consumer != NULL, ("Non-valid disk in %s.", __func__)); 1174Srgrimes sc = disk->d_softc; 1184Srgrimes cp = disk->d_consumer; 1194Srgrimes 1204Srgrimes G_CONCAT_DEBUG(0, "Disk %s removed from %s.", cp->provider->name, 1214Srgrimes sc->sc_geom->name); 1224Srgrimes 1234Srgrimes disk->d_consumer = NULL; 1244Srgrimes if (sc->sc_provider != NULL) { 1254Srgrimes g_orphan_provider(sc->sc_provider, ENXIO); 1264Srgrimes sc->sc_provider = NULL; 1274Srgrimes G_CONCAT_DEBUG(0, "Device %s removed.", sc->sc_geom->name); 1284Srgrimes } 1294Srgrimes 1304Srgrimes if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0) 1314Srgrimes g_access(cp, -cp->acr, -cp->acw, -cp->ace); 1324Srgrimes g_detach(cp); 1334Srgrimes g_destroy_consumer(cp); 1344Srgrimes} 1354Srgrimes 1364Srgrimesstatic void 1374Srgrimesg_concat_orphan(struct g_consumer *cp) 1384Srgrimes{ 1394Srgrimes struct g_concat_softc *sc; 1404Srgrimes struct g_concat_disk *disk; 1414Srgrimes struct g_geom *gp; 1424Srgrimes 1434Srgrimes g_topology_assert(); 1444Srgrimes gp = cp->geom; 1454Srgrimes sc = gp->softc; 1464Srgrimes if (sc == NULL) 1474Srgrimes return; 1484Srgrimes 1494Srgrimes disk = cp->private; 1504Srgrimes if (disk == NULL) /* Possible? */ 1514Srgrimes return; 1524Srgrimes g_concat_remove_disk(disk); 1534Srgrimes 1544Srgrimes /* If there are no valid disks anymore, remove device. */ 1554Srgrimes if (g_concat_nvalid(sc) == 0) 1564Srgrimes g_concat_destroy(sc, 1); 1574Srgrimes} 1584Srgrimes 1594Srgrimesstatic int 1604Srgrimesg_concat_access(struct g_provider *pp, int dr, int dw, int de) 1614Srgrimes{ 1624Srgrimes struct g_consumer *cp1, *cp2; 1634Srgrimes struct g_concat_softc *sc; 1644Srgrimes struct g_geom *gp; 1654Srgrimes int error; 1664Srgrimes 1674Srgrimes gp = pp->geom; 1684Srgrimes sc = gp->softc; 1694Srgrimes 1704Srgrimes if (sc == NULL) { 1714Srgrimes /* 1724Srgrimes * It looks like geom is being withered. 1734Srgrimes * In that case we allow only negative requests. 1744Srgrimes */ 1754Srgrimes KASSERT(dr <= 0 && dw <= 0 && de <= 0, 1764Srgrimes ("Positive access request (device=%s).", pp->name)); 1774Srgrimes if ((pp->acr + dr) == 0 && (pp->acw + dw) == 0 && 1784Srgrimes (pp->ace + de) == 0) { 1794Srgrimes G_CONCAT_DEBUG(0, "Device %s definitely destroyed.", 1804Srgrimes gp->name); 1814Srgrimes } 1824Srgrimes return (0); 1834Srgrimes } 1844Srgrimes 1854Srgrimes /* On first open, grab an extra "exclusive" bit */ 1864Srgrimes if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0) 1874Srgrimes de++; 1884Srgrimes /* ... and let go of it on last close */ 1894Srgrimes if ((pp->acr + dr) == 0 && (pp->acw + dw) == 0 && (pp->ace + de) == 1) 1904Srgrimes de--; 1914Srgrimes 1924Srgrimes error = ENXIO; 1934Srgrimes LIST_FOREACH(cp1, &gp->consumer, consumer) { 1944Srgrimes error = g_access(cp1, dr, dw, de); 1954Srgrimes if (error == 0) 1964Srgrimes continue; 1974Srgrimes /* 1984Srgrimes * If we fail here, backout all previous changes. 1994Srgrimes */ 2004Srgrimes LIST_FOREACH(cp2, &gp->consumer, consumer) { 2014Srgrimes if (cp1 == cp2) 2024Srgrimes return (error); 2034Srgrimes g_access(cp2, -dr, -dw, -de); 2044Srgrimes } 2054Srgrimes /* NOTREACHED */ 2064Srgrimes } 2074Srgrimes 2084Srgrimes return (error); 2094Srgrimes} 2104Srgrimes 2114Srgrimesstatic void 2124Srgrimesg_concat_start(struct bio *bp) 2134Srgrimes{ 2144Srgrimes struct g_concat_softc *sc; 2154Srgrimes struct g_concat_disk *disk; 2164Srgrimes struct g_provider *pp; 2174Srgrimes off_t offset, end, length, off, len; 2184Srgrimes struct bio *cbp; 2194Srgrimes char *addr; 2204Srgrimes u_int no; 2214Srgrimes 2224Srgrimes pp = bp->bio_to; 2234Srgrimes sc = pp->geom->softc; 2244Srgrimes /* 2254Srgrimes * If sc == NULL, provider's error should be set and g_concat_start() 2264Srgrimes * should not be called at all. 2274Srgrimes */ 2284Srgrimes KASSERT(sc != NULL, 2294Srgrimes ("Provider's error should be set (error=%d)(device=%s).", 2304Srgrimes bp->bio_to->error, bp->bio_to->name)); 2314Srgrimes 2324Srgrimes G_CONCAT_LOGREQ(bp, "Request received."); 2334Srgrimes 2344Srgrimes switch (bp->bio_cmd) { 2354Srgrimes case BIO_READ: 2364Srgrimes case BIO_WRITE: 2374Srgrimes case BIO_DELETE: 2384Srgrimes break; 2394Srgrimes case BIO_GETATTR: 2404Srgrimes /* To which provider it should be delivered? */ 2414Srgrimes default: 2424Srgrimes g_io_deliver(bp, EOPNOTSUPP); 2434Srgrimes return; 2444Srgrimes } 2454Srgrimes 2464Srgrimes offset = bp->bio_offset; 2474Srgrimes length = bp->bio_length; 2484Srgrimes addr = bp->bio_data; 2494Srgrimes end = offset + length; 2504Srgrimes 2514Srgrimes for (no = 0; no < sc->sc_ndisks; no++) { 2524Srgrimes disk = &sc->sc_disks[no]; 2534Srgrimes if (disk->d_end <= offset) 2544Srgrimes continue; 2554Srgrimes if (disk->d_start >= end) 2564Srgrimes break; 2574Srgrimes 2584Srgrimes off = offset - disk->d_start; 2594Srgrimes len = MIN(length, disk->d_end - offset); 2604Srgrimes length -= len; 2614Srgrimes offset += len; 2624Srgrimes 2634Srgrimes cbp = g_clone_bio(bp); 2644Srgrimes if (cbp == NULL) { 2654Srgrimes if (bp->bio_error == 0) 2664Srgrimes bp->bio_error = ENOMEM; 2674Srgrimes return; 2684Srgrimes } 2694Srgrimes /* 2704Srgrimes * Fill in the component buf structure. 2714Srgrimes */ 2724Srgrimes cbp->bio_done = g_std_done; 2734Srgrimes cbp->bio_offset = off; 2744Srgrimes cbp->bio_data = addr; 2754Srgrimes addr += len; 2764Srgrimes cbp->bio_length = len; 2774Srgrimes cbp->bio_to = disk->d_consumer->provider; 2784Srgrimes G_CONCAT_LOGREQ(cbp, "Sending request."); 2794Srgrimes g_io_request(cbp, disk->d_consumer); 2804Srgrimes 2814Srgrimes if (length == 0) 2824Srgrimes break; 2834Srgrimes } 2844Srgrimes 2854Srgrimes KASSERT(length == 0, 2864Srgrimes ("Length is still greater than 0 (class=%s, name=%s).", 2874Srgrimes bp->bio_to->geom->class->name, bp->bio_to->geom->name)); 2884Srgrimes} 2894Srgrimes 2904Srgrimesstatic void 291798Swollmang_concat_check_and_run(struct g_concat_softc *sc) 2924Srgrimes{ 2934Srgrimes struct g_concat_disk *disk; 2944Srgrimes u_int no, sectorsize = 0; 2954Srgrimes off_t start; 2964Srgrimes 2974Srgrimes if (g_concat_nvalid(sc) != sc->sc_ndisks) 2984Srgrimes return; 2994Srgrimes 3004Srgrimes sc->sc_provider = g_new_providerf(sc->sc_geom, "%s", sc->sc_geom->name); 3014Srgrimes start = 0; 3024Srgrimes for (no = 0; no < sc->sc_ndisks; no++) { 3034Srgrimes disk = &sc->sc_disks[no]; 3044Srgrimes disk->d_start = start; 3054Srgrimes disk->d_end = disk->d_start + 3064Srgrimes disk->d_consumer->provider->mediasize; 3074Srgrimes if (sc->sc_type == G_CONCAT_TYPE_AUTOMATIC) 3084Srgrimes disk->d_end -= disk->d_consumer->provider->sectorsize; 3094Srgrimes start = disk->d_end; 3104Srgrimes if (no == 0) 3114Srgrimes sectorsize = disk->d_consumer->provider->sectorsize; 3124Srgrimes else { 3134Srgrimes sectorsize = lcm(sectorsize, 3144Srgrimes disk->d_consumer->provider->sectorsize); 3154Srgrimes } 3164Srgrimes } 3174Srgrimes sc->sc_provider->sectorsize = sectorsize; 3184Srgrimes /* We have sc->sc_disks[sc->sc_ndisks - 1].d_end in 'start'. */ 3194Srgrimes sc->sc_provider->mediasize = start; 3204Srgrimes g_error_provider(sc->sc_provider, 0); 3214Srgrimes 3224Srgrimes G_CONCAT_DEBUG(0, "Device %s activated.", sc->sc_geom->name); 3234Srgrimes} 3244Srgrimes 3254Srgrimesstatic int 3264Srgrimesg_concat_read_metadata(struct g_consumer *cp, struct g_concat_metadata *md) 3274Srgrimes{ 3284Srgrimes struct g_provider *pp; 3294Srgrimes u_char *buf; 3304Srgrimes int error; 3314Srgrimes 3324Srgrimes g_topology_assert(); 3334Srgrimes 3344Srgrimes error = g_access(cp, 1, 0, 0); 3354Srgrimes if (error != 0) 3364Srgrimes return (error); 3374Srgrimes pp = cp->provider; 3384Srgrimes g_topology_unlock(); 3394Srgrimes buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize, 3404Srgrimes &error); 3414Srgrimes g_topology_lock(); 3424Srgrimes g_access(cp, -1, 0, 0); 3434Srgrimes if (buf == NULL) 3444Srgrimes return (error); 3454Srgrimes 3464Srgrimes /* Decode metadata. */ 3474Srgrimes concat_metadata_decode(buf, md); 3484Srgrimes g_free(buf); 3494Srgrimes 350 return (0); 351} 352 353/* 354 * Add disk to given device. 355 */ 356static int 357g_concat_add_disk(struct g_concat_softc *sc, struct g_provider *pp, u_int no) 358{ 359 struct g_concat_disk *disk; 360 struct g_consumer *cp, *fcp; 361 struct g_geom *gp; 362 int error; 363 364 /* Metadata corrupted? */ 365 if (no >= sc->sc_ndisks) 366 return (EINVAL); 367 368 disk = &sc->sc_disks[no]; 369 /* Check if disk is not already attached. */ 370 if (disk->d_consumer != NULL) 371 return (EEXIST); 372 373 gp = sc->sc_geom; 374 fcp = LIST_FIRST(&gp->consumer); 375 376 cp = g_new_consumer(gp); 377 error = g_attach(cp, pp); 378 if (error != 0) { 379 g_destroy_consumer(cp); 380 return (error); 381 } 382 383 if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0)) { 384 error = g_access(cp, fcp->acr, fcp->acw, fcp->ace); 385 if (error != 0) { 386 g_detach(cp); 387 g_destroy_consumer(cp); 388 return (error); 389 } 390 } 391 if (sc->sc_type == G_CONCAT_TYPE_AUTOMATIC) { 392 struct g_concat_metadata md; 393 394 /* Re-read metadata. */ 395 error = g_concat_read_metadata(cp, &md); 396 if (error != 0) 397 goto fail; 398 399 if (strcmp(md.md_magic, G_CONCAT_MAGIC) != 0 || 400 strcmp(md.md_name, sc->sc_name) != 0 || 401 md.md_id != sc->sc_id) { 402 G_CONCAT_DEBUG(0, "Metadata on %s changed.", pp->name); 403 goto fail; 404 } 405 } 406 407 cp->private = disk; 408 disk->d_consumer = cp; 409 disk->d_softc = sc; 410 disk->d_start = 0; /* not yet */ 411 disk->d_end = 0; /* not yet */ 412 413 G_CONCAT_DEBUG(0, "Disk %s attached to %s.", pp->name, gp->name); 414 415 g_concat_check_and_run(sc); 416 417 return (0); 418fail: 419 if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0)) 420 g_access(cp, -fcp->acr, -fcp->acw, -fcp->ace); 421 g_detach(cp); 422 g_destroy_consumer(cp); 423 return (error); 424} 425 426static struct g_geom * 427g_concat_create(struct g_class *mp, const struct g_concat_metadata *md, 428 u_int type) 429{ 430 struct g_concat_softc *sc; 431 struct g_geom *gp; 432 u_int no; 433 434 G_CONCAT_DEBUG(1, "Creating device %s.concat (id=%u).", md->md_name, 435 md->md_id); 436 437 /* Two disks is minimum. */ 438 if (md->md_all <= 1) 439 return (NULL); 440 441 /* Check for duplicate unit */ 442 LIST_FOREACH(gp, &mp->geom, geom) { 443 sc = gp->softc; 444 if (sc != NULL && strcmp(sc->sc_name, md->md_name) == 0) { 445 G_CONCAT_DEBUG(0, "Device %s already configured.", 446 gp->name); 447 return (NULL); 448 } 449 } 450 gp = g_new_geomf(mp, "%s.concat", md->md_name); 451 gp->softc = NULL; /* for a moment */ 452 453 sc = malloc(sizeof(*sc), M_CONCAT, M_NOWAIT | M_ZERO); 454 if (sc == NULL) { 455 G_CONCAT_DEBUG(0, "Can't allocate memory for device %s.", 456 gp->name); 457 g_destroy_geom(gp); 458 return (NULL); 459 } 460 461 gp->start = g_concat_start; 462 gp->spoiled = g_concat_orphan; 463 gp->orphan = g_concat_orphan; 464 gp->access = g_concat_access; 465 gp->dumpconf = g_concat_dumpconf; 466 467 strlcpy(sc->sc_name, md->md_name, sizeof(sc->sc_name)); 468 sc->sc_id = md->md_id; 469 sc->sc_ndisks = md->md_all; 470 sc->sc_disks = malloc(sizeof(struct g_concat_disk) * sc->sc_ndisks, 471 M_CONCAT, M_WAITOK | M_ZERO); 472 for (no = 0; no < sc->sc_ndisks; no++) 473 sc->sc_disks[no].d_consumer = NULL; 474 sc->sc_type = type; 475 476 gp->softc = sc; 477 sc->sc_geom = gp; 478 sc->sc_provider = NULL; 479 480 G_CONCAT_DEBUG(0, "Device %s created (id=%u).", gp->name, sc->sc_id); 481 482 return (gp); 483} 484 485static int 486g_concat_destroy(struct g_concat_softc *sc, boolean_t force) 487{ 488 struct g_provider *pp; 489 struct g_geom *gp; 490 u_int no; 491 492 g_topology_assert(); 493 494 if (sc == NULL) 495 return (ENXIO); 496 497 pp = sc->sc_provider; 498 if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) { 499 if (force) { 500 G_CONCAT_DEBUG(0, "Device %s is still open, so it " 501 "can't be definitely removed.", pp->name); 502 } else { 503 G_CONCAT_DEBUG(1, 504 "Device %s is still open (r%dw%de%d).", pp->name, 505 pp->acr, pp->acw, pp->ace); 506 return (EBUSY); 507 } 508 } 509 510 for (no = 0; no < sc->sc_ndisks; no++) { 511 if (sc->sc_disks[no].d_consumer != NULL) 512 g_concat_remove_disk(&sc->sc_disks[no]); 513 } 514 515 gp = sc->sc_geom; 516 gp->softc = NULL; 517 KASSERT(sc->sc_provider == NULL, ("Provider still exists? (device=%s)", 518 gp->name)); 519 free(sc->sc_disks, M_CONCAT); 520 free(sc, M_CONCAT); 521 522 pp = LIST_FIRST(&gp->provider); 523 if (pp == NULL || (pp->acr == 0 && pp->acw == 0 && pp->ace == 0)) 524 G_CONCAT_DEBUG(0, "Device %s destroyed.", gp->name); 525 526 g_wither_geom(gp, ENXIO); 527 528 return (0); 529} 530 531static int 532g_concat_destroy_geom(struct gctl_req *req __unused, 533 struct g_class *mp __unused, struct g_geom *gp) 534{ 535 struct g_concat_softc *sc; 536 537 sc = gp->softc; 538 return (g_concat_destroy(sc, 0)); 539} 540 541static struct g_geom * 542g_concat_taste(struct g_class *mp, struct g_provider *pp, int flags __unused) 543{ 544 struct g_concat_metadata md; 545 struct g_concat_softc *sc; 546 struct g_consumer *cp; 547 struct g_geom *gp; 548 int error; 549 550 g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name); 551 g_topology_assert(); 552 553 G_CONCAT_DEBUG(3, "Tasting %s.", pp->name); 554 555 gp = g_new_geomf(mp, "concat:taste"); 556 gp->start = g_concat_start; 557 gp->access = g_concat_access; 558 gp->orphan = g_concat_orphan; 559 cp = g_new_consumer(gp); 560 g_attach(cp, pp); 561 562 error = g_concat_read_metadata(cp, &md); 563 g_wither_geom(gp, ENXIO); 564 if (error != 0) 565 return (NULL); 566 gp = NULL; 567 568 if (strcmp(md.md_magic, G_CONCAT_MAGIC) != 0) 569 return (NULL); 570 if (md.md_version > G_CONCAT_VERSION) { 571 printf("geom_concat.ko module is too old to handle %s.\n", 572 pp->name); 573 return (NULL); 574 } 575 576 /* 577 * Let's check if device already exists. 578 */ 579 sc = NULL; 580 LIST_FOREACH(gp, &mp->geom, geom) { 581 sc = gp->softc; 582 if (sc == NULL) 583 continue; 584 if (sc->sc_type != G_CONCAT_TYPE_AUTOMATIC) 585 continue; 586 if (strcmp(md.md_name, sc->sc_name) != 0) 587 continue; 588 if (md.md_id != sc->sc_id) 589 continue; 590 break; 591 } 592 if (gp != NULL) { 593 G_CONCAT_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); 594 error = g_concat_add_disk(sc, pp, md.md_no); 595 if (error != 0) { 596 G_CONCAT_DEBUG(0, 597 "Cannot add disk %s to %s (error=%d).", pp->name, 598 gp->name, error); 599 return (NULL); 600 } 601 } else { 602 gp = g_concat_create(mp, &md, G_CONCAT_TYPE_AUTOMATIC); 603 if (gp == NULL) { 604 G_CONCAT_DEBUG(0, "Cannot create device %s.concat.", 605 md.md_name); 606 return (NULL); 607 } 608 sc = gp->softc; 609 G_CONCAT_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); 610 error = g_concat_add_disk(sc, pp, md.md_no); 611 if (error != 0) { 612 G_CONCAT_DEBUG(0, 613 "Cannot add disk %s to %s (error=%d).", pp->name, 614 gp->name, error); 615 g_concat_destroy(sc, 1); 616 return (NULL); 617 } 618 } 619 620 return (gp); 621} 622 623static void 624g_concat_ctl_create(struct gctl_req *req, struct g_class *mp) 625{ 626 u_int attached, no; 627 struct g_concat_metadata md; 628 struct g_provider *pp; 629 struct g_concat_softc *sc; 630 struct g_geom *gp; 631 struct sbuf *sb; 632 const char *name; 633 char param[16]; 634 int *nargs; 635 636 g_topology_assert(); 637 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 638 if (nargs == NULL) { 639 gctl_error(req, "No '%s' argument.", "nargs"); 640 return; 641 } 642 if (*nargs <= 2) { 643 gctl_error(req, "Too few arguments."); 644 return; 645 } 646 647 strlcpy(md.md_magic, G_CONCAT_MAGIC, sizeof(md.md_magic)); 648 md.md_version = G_CONCAT_VERSION; 649 name = gctl_get_asciiparam(req, "arg0"); 650 if (name == NULL) { 651 gctl_error(req, "No 'arg%u' argument.", 0); 652 return; 653 } 654 strlcpy(md.md_name, name, sizeof(md.md_name)); 655 md.md_id = arc4random(); 656 md.md_no = 0; 657 md.md_all = *nargs - 1; 658 659 /* Check all providers are valid */ 660 for (no = 1; no < *nargs; no++) { 661 snprintf(param, sizeof(param), "arg%u", no); 662 name = gctl_get_asciiparam(req, param); 663 if (name == NULL) { 664 gctl_error(req, "No 'arg%u' argument.", no); 665 return; 666 } 667 if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 668 name += strlen("/dev/"); 669 pp = g_provider_by_name(name); 670 if (pp == NULL) { 671 G_CONCAT_DEBUG(1, "Disk %s is invalid.", name); 672 gctl_error(req, "Disk %s is invalid.", name); 673 return; 674 } 675 } 676 677 gp = g_concat_create(mp, &md, G_CONCAT_TYPE_MANUAL); 678 if (gp == NULL) { 679 gctl_error(req, "Can't configure %s.concat.", md.md_name); 680 return; 681 } 682 683 sc = gp->softc; 684 sb = sbuf_new(NULL, NULL, 0, SBUF_AUTOEXTEND); 685 sbuf_printf(sb, "Can't attach disk(s) to %s:", gp->name); 686 for (attached = 0, no = 1; no < *nargs; no++) { 687 snprintf(param, sizeof(param), "arg%u", no); 688 name = gctl_get_asciiparam(req, param); 689 if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 690 name += strlen("/dev/"); 691 pp = g_provider_by_name(name); 692 KASSERT(pp != NULL, ("Provider %s disappear?!", name)); 693 if (g_concat_add_disk(sc, pp, no - 1) != 0) { 694 G_CONCAT_DEBUG(1, "Disk %u (%s) not attached to %s.", 695 no, pp->name, gp->name); 696 sbuf_printf(sb, " %s", pp->name); 697 continue; 698 } 699 attached++; 700 } 701 sbuf_finish(sb); 702 if (md.md_all != attached) { 703 g_concat_destroy(gp->softc, 1); 704 gctl_error(req, "%s", sbuf_data(sb)); 705 } 706 sbuf_delete(sb); 707} 708 709static struct g_concat_softc * 710g_concat_find_device(struct g_class *mp, const char *name) 711{ 712 struct g_concat_softc *sc; 713 struct g_geom *gp; 714 715 LIST_FOREACH(gp, &mp->geom, geom) { 716 sc = gp->softc; 717 if (sc == NULL) 718 continue; 719 if (strcmp(gp->name, name) == 0 || 720 strcmp(sc->sc_name, name) == 0) { 721 return (sc); 722 } 723 } 724 return (NULL); 725} 726 727static void 728g_concat_ctl_destroy(struct gctl_req *req, struct g_class *mp) 729{ 730 struct g_concat_softc *sc; 731 int *force, *nargs, error; 732 const char *name; 733 char param[16]; 734 u_int i; 735 736 g_topology_assert(); 737 738 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 739 if (nargs == NULL) { 740 gctl_error(req, "No '%s' argument.", "nargs"); 741 return; 742 } 743 if (*nargs <= 0) { 744 gctl_error(req, "Missing device(s)."); 745 return; 746 } 747 force = gctl_get_paraml(req, "force", sizeof(*force)); 748 if (force == NULL) { 749 gctl_error(req, "No '%s' argument.", "force"); 750 return; 751 } 752 753 for (i = 0; i < (u_int)*nargs; i++) { 754 snprintf(param, sizeof(param), "arg%u", i); 755 name = gctl_get_asciiparam(req, param); 756 if (name == NULL) { 757 gctl_error(req, "No 'arg%u' argument.", i); 758 return; 759 } 760 sc = g_concat_find_device(mp, name); 761 if (sc == NULL) { 762 gctl_error(req, "No such device: %s.", name); 763 return; 764 } 765 error = g_concat_destroy(sc, *force); 766 if (error != 0) { 767 gctl_error(req, "Cannot destroy device %s (error=%d).", 768 sc->sc_geom->name, error); 769 return; 770 } 771 } 772} 773 774static void 775g_concat_config(struct gctl_req *req, struct g_class *mp, const char *verb) 776{ 777 uint32_t *version; 778 779 g_topology_assert(); 780 781 version = gctl_get_paraml(req, "version", sizeof(*version)); 782 if (version == NULL) { 783 gctl_error(req, "No '%s' argument.", "version"); 784 return; 785 } 786 if (*version != G_CONCAT_VERSION) { 787 gctl_error(req, "Userland and kernel parts are out of sync."); 788 return; 789 } 790 791 if (strcmp(verb, "create") == 0) { 792 g_concat_ctl_create(req, mp); 793 return; 794 } else if (strcmp(verb, "destroy") == 0) { 795 g_concat_ctl_destroy(req, mp); 796 return; 797 } 798 gctl_error(req, "Unknown verb."); 799} 800 801static void 802g_concat_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 803 struct g_consumer *cp, struct g_provider *pp) 804{ 805 struct g_concat_softc *sc; 806 807 sc = gp->softc; 808 if (sc == NULL) 809 return; 810 if (pp == NULL && cp == NULL) { 811 sbuf_printf(sb, "%s<id>%u</id>\n", indent, (u_int)sc->sc_id); 812 switch (sc->sc_type) { 813 case G_CONCAT_TYPE_AUTOMATIC: 814 sbuf_printf(sb, "%s<type>%s</type>\n", indent, 815 "automatic"); 816 break; 817 case G_CONCAT_TYPE_MANUAL: 818 sbuf_printf(sb, "%s<type>%s</type>\n", indent, 819 "manual"); 820 break; 821 default: 822 sbuf_printf(sb, "%s<type>%s</type>\n", indent, 823 "unknown"); 824 break; 825 } 826 } 827} 828 829DECLARE_GEOM_CLASS(g_concat_class, g_concat); 830