1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2004-2006 Pawel Jakub Dawidek <pjd@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/param.h> 30 #include <sys/systm.h> 31 #include <sys/bio.h> 32 #include <sys/eventhandler.h> 33 #include <sys/kernel.h> 34 #include <sys/kthread.h> 35 #include <sys/limits.h> 36 #include <sys/lock.h> 37 #include <sys/malloc.h> 38 #include <sys/module.h> 39 #include <sys/mutex.h> 40 #include <sys/proc.h> 41 #include <sys/reboot.h> 42 #include <sys/sbuf.h> 43 #include <sys/sched.h> 44 #include <sys/sysctl.h> 45 46 #include <vm/uma.h> 47 48 #include <geom/geom.h> 49 #include <geom/geom_dbg.h> 50 #include <geom/geom_disk.h> 51 #include <geom/raid3/g_raid3.h> 52 53 FEATURE(geom_raid3, "GEOM RAID-3 functionality"); 54 55 static MALLOC_DEFINE(M_RAID3, "raid3_data", "GEOM_RAID3 Data"); 56 57 SYSCTL_DECL(_kern_geom); 58 static SYSCTL_NODE(_kern_geom, OID_AUTO, raid3, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 59 "GEOM_RAID3 stuff"); 60 u_int g_raid3_debug = 0; 61 SYSCTL_UINT(_kern_geom_raid3, OID_AUTO, debug, CTLFLAG_RWTUN, &g_raid3_debug, 0, 62 "Debug level"); 63 static u_int g_raid3_timeout = 4; 64 SYSCTL_UINT(_kern_geom_raid3, OID_AUTO, timeout, CTLFLAG_RWTUN, &g_raid3_timeout, 65 0, "Time to wait on all raid3 components"); 66 static u_int g_raid3_idletime = 5; 67 SYSCTL_UINT(_kern_geom_raid3, OID_AUTO, idletime, CTLFLAG_RWTUN, 68 &g_raid3_idletime, 0, "Mark components as clean when idling"); 69 static u_int g_raid3_disconnect_on_failure = 1; 70 SYSCTL_UINT(_kern_geom_raid3, OID_AUTO, disconnect_on_failure, CTLFLAG_RWTUN, 71 &g_raid3_disconnect_on_failure, 0, "Disconnect component on I/O failure."); 72 static u_int g_raid3_syncreqs = 2; 73 SYSCTL_UINT(_kern_geom_raid3, OID_AUTO, sync_requests, CTLFLAG_RDTUN, 74 &g_raid3_syncreqs, 0, "Parallel synchronization I/O requests."); 75 static u_int g_raid3_use_malloc = 0; 76 SYSCTL_UINT(_kern_geom_raid3, OID_AUTO, use_malloc, CTLFLAG_RDTUN, 77 &g_raid3_use_malloc, 0, "Use malloc(9) instead of uma(9)."); 78 79 static u_int g_raid3_n64k = 50; 80 SYSCTL_UINT(_kern_geom_raid3, OID_AUTO, n64k, CTLFLAG_RDTUN, &g_raid3_n64k, 0, 81 "Maximum number of 64kB allocations"); 82 static u_int g_raid3_n16k = 200; 83 SYSCTL_UINT(_kern_geom_raid3, OID_AUTO, n16k, CTLFLAG_RDTUN, &g_raid3_n16k, 0, 84 "Maximum number of 16kB allocations"); 85 static u_int g_raid3_n4k = 1200; 86 SYSCTL_UINT(_kern_geom_raid3, OID_AUTO, n4k, CTLFLAG_RDTUN, &g_raid3_n4k, 0, 87 "Maximum number of 4kB allocations"); 88 89 static SYSCTL_NODE(_kern_geom_raid3, OID_AUTO, stat, 90 CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 91 "GEOM_RAID3 statistics"); 92 static u_int g_raid3_parity_mismatch = 0; 93 SYSCTL_UINT(_kern_geom_raid3_stat, OID_AUTO, parity_mismatch, CTLFLAG_RD, 94 &g_raid3_parity_mismatch, 0, "Number of failures in VERIFY mode"); 95 96 #define MSLEEP(ident, mtx, priority, wmesg, timeout) do { \ 97 G_RAID3_DEBUG(4, "%s: Sleeping %p.", __func__, (ident)); \ 98 msleep((ident), (mtx), (priority), (wmesg), (timeout)); \ 99 G_RAID3_DEBUG(4, "%s: Woken up %p.", __func__, (ident)); \ 100 } while (0) 101 102 static eventhandler_tag g_raid3_post_sync = NULL; 103 static int g_raid3_shutdown = 0; 104 105 static int g_raid3_destroy_geom(struct gctl_req *req, struct g_class *mp, 106 struct g_geom *gp); 107 static g_taste_t g_raid3_taste; 108 static void g_raid3_init(struct g_class *mp); 109 static void g_raid3_fini(struct g_class *mp); 110 static void g_raid3_providergone(struct g_provider *pp); 111 112 struct g_class g_raid3_class = { 113 .name = G_RAID3_CLASS_NAME, 114 .version = G_VERSION, 115 .ctlreq = g_raid3_config, 116 .taste = g_raid3_taste, 117 .destroy_geom = g_raid3_destroy_geom, 118 .init = g_raid3_init, 119 .fini = g_raid3_fini, 120 .providergone = g_raid3_providergone, 121 }; 122 123 static void g_raid3_destroy_provider(struct g_raid3_softc *sc); 124 static int g_raid3_update_disk(struct g_raid3_disk *disk, u_int state); 125 static void g_raid3_update_device(struct g_raid3_softc *sc, boolean_t force); 126 static void g_raid3_dumpconf(struct sbuf *sb, const char *indent, 127 struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp); 128 static void g_raid3_sync_stop(struct g_raid3_softc *sc, int type); 129 static int g_raid3_register_request(struct bio *pbp); 130 static void g_raid3_sync_release(struct g_raid3_softc *sc); 131 static void g_raid3_timeout_drain(struct g_raid3_softc *sc); 132 133 static const char * 134 g_raid3_disk_state2str(int state) 135 { 136 137 switch (state) { 138 case G_RAID3_DISK_STATE_NODISK: 139 return ("NODISK"); 140 case G_RAID3_DISK_STATE_NONE: 141 return ("NONE"); 142 case G_RAID3_DISK_STATE_NEW: 143 return ("NEW"); 144 case G_RAID3_DISK_STATE_ACTIVE: 145 return ("ACTIVE"); 146 case G_RAID3_DISK_STATE_STALE: 147 return ("STALE"); 148 case G_RAID3_DISK_STATE_SYNCHRONIZING: 149 return ("SYNCHRONIZING"); 150 case G_RAID3_DISK_STATE_DISCONNECTED: 151 return ("DISCONNECTED"); 152 default: 153 return ("INVALID"); 154 } 155 } 156 157 static const char * 158 g_raid3_device_state2str(int state) 159 { 160 161 switch (state) { 162 case G_RAID3_DEVICE_STATE_STARTING: 163 return ("STARTING"); 164 case G_RAID3_DEVICE_STATE_DEGRADED: 165 return ("DEGRADED"); 166 case G_RAID3_DEVICE_STATE_COMPLETE: 167 return ("COMPLETE"); 168 default: 169 return ("INVALID"); 170 } 171 } 172 173 const char * 174 g_raid3_get_diskname(struct g_raid3_disk *disk) 175 { 176 177 if (disk->d_consumer == NULL || disk->d_consumer->provider == NULL) 178 return ("[unknown]"); 179 return (disk->d_name); 180 } 181 182 static void * 183 g_raid3_alloc(struct g_raid3_softc *sc, size_t size, int flags) 184 { 185 void *ptr; 186 enum g_raid3_zones zone; 187 188 if (g_raid3_use_malloc || 189 (zone = g_raid3_zone(size)) == G_RAID3_NUM_ZONES) 190 ptr = malloc(size, M_RAID3, flags); 191 else { 192 ptr = uma_zalloc_arg(sc->sc_zones[zone].sz_zone, 193 &sc->sc_zones[zone], flags); 194 sc->sc_zones[zone].sz_requested++; 195 if (ptr == NULL) 196 sc->sc_zones[zone].sz_failed++; 197 } 198 return (ptr); 199 } 200 201 static void 202 g_raid3_free(struct g_raid3_softc *sc, void *ptr, size_t size) 203 { 204 enum g_raid3_zones zone; 205 206 if (g_raid3_use_malloc || 207 (zone = g_raid3_zone(size)) == G_RAID3_NUM_ZONES) 208 free(ptr, M_RAID3); 209 else { 210 uma_zfree_arg(sc->sc_zones[zone].sz_zone, 211 ptr, &sc->sc_zones[zone]); 212 } 213 } 214 215 static int 216 g_raid3_uma_ctor(void *mem, int size, void *arg, int flags) 217 { 218 struct g_raid3_zone *sz = arg; 219 220 if (sz->sz_max > 0 && sz->sz_inuse == sz->sz_max) 221 return (ENOMEM); 222 sz->sz_inuse++; 223 return (0); 224 } 225 226 static void 227 g_raid3_uma_dtor(void *mem, int size, void *arg) 228 { 229 struct g_raid3_zone *sz = arg; 230 231 sz->sz_inuse--; 232 } 233 234 #define g_raid3_xor(src, dst, size) \ 235 _g_raid3_xor((uint64_t *)(src), \ 236 (uint64_t *)(dst), (size_t)size) 237 static void 238 _g_raid3_xor(uint64_t *src, uint64_t *dst, size_t size) 239 { 240 241 KASSERT((size % 128) == 0, ("Invalid size: %zu.", size)); 242 for (; size > 0; size -= 128) { 243 *dst++ ^= (*src++); 244 *dst++ ^= (*src++); 245 *dst++ ^= (*src++); 246 *dst++ ^= (*src++); 247 *dst++ ^= (*src++); 248 *dst++ ^= (*src++); 249 *dst++ ^= (*src++); 250 *dst++ ^= (*src++); 251 *dst++ ^= (*src++); 252 *dst++ ^= (*src++); 253 *dst++ ^= (*src++); 254 *dst++ ^= (*src++); 255 *dst++ ^= (*src++); 256 *dst++ ^= (*src++); 257 *dst++ ^= (*src++); 258 *dst++ ^= (*src++); 259 } 260 } 261 262 static int 263 g_raid3_is_zero(struct bio *bp) 264 { 265 static const uint64_t zeros[] = { 266 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 267 }; 268 u_char *addr; 269 ssize_t size; 270 271 size = bp->bio_length; 272 addr = (u_char *)bp->bio_data; 273 for (; size > 0; size -= sizeof(zeros), addr += sizeof(zeros)) { 274 if (bcmp(addr, zeros, sizeof(zeros)) != 0) 275 return (0); 276 } 277 return (1); 278 } 279 280 /* 281 * --- Events handling functions --- 282 * Events in geom_raid3 are used to maintain disks and device status 283 * from one thread to simplify locking. 284 */ 285 static void 286 g_raid3_event_free(struct g_raid3_event *ep) 287 { 288 289 free(ep, M_RAID3); 290 } 291 292 static int 293 g_raid3_event_dispatch(struct g_raid3_event *ep, void *arg, int state, 294 int flags) 295 { 296 struct g_raid3_softc *sc; 297 struct g_raid3_disk *disk; 298 int error; 299 300 G_RAID3_DEBUG(4, "%s: Sending event %p.", __func__, ep); 301 if ((flags & G_RAID3_EVENT_DEVICE) != 0) { 302 disk = NULL; 303 sc = arg; 304 } else { 305 disk = arg; 306 sc = disk->d_softc; 307 } 308 ep->e_disk = disk; 309 ep->e_state = state; 310 ep->e_flags = flags; 311 ep->e_error = 0; 312 mtx_lock(&sc->sc_events_mtx); 313 TAILQ_INSERT_TAIL(&sc->sc_events, ep, e_next); 314 mtx_unlock(&sc->sc_events_mtx); 315 G_RAID3_DEBUG(4, "%s: Waking up %p.", __func__, sc); 316 mtx_lock(&sc->sc_queue_mtx); 317 wakeup(sc); 318 wakeup(&sc->sc_queue); 319 mtx_unlock(&sc->sc_queue_mtx); 320 if ((flags & G_RAID3_EVENT_DONTWAIT) != 0) 321 return (0); 322 sx_assert(&sc->sc_lock, SX_XLOCKED); 323 G_RAID3_DEBUG(4, "%s: Sleeping %p.", __func__, ep); 324 sx_xunlock(&sc->sc_lock); 325 while ((ep->e_flags & G_RAID3_EVENT_DONE) == 0) { 326 mtx_lock(&sc->sc_events_mtx); 327 MSLEEP(ep, &sc->sc_events_mtx, PRIBIO | PDROP, "r3:event", 328 hz * 5); 329 } 330 error = ep->e_error; 331 g_raid3_event_free(ep); 332 sx_xlock(&sc->sc_lock); 333 return (error); 334 } 335 336 int 337 g_raid3_event_send(void *arg, int state, int flags) 338 { 339 struct g_raid3_event *ep; 340 341 ep = malloc(sizeof(*ep), M_RAID3, M_WAITOK); 342 return (g_raid3_event_dispatch(ep, arg, state, flags)); 343 } 344 345 static struct g_raid3_event * 346 g_raid3_event_get(struct g_raid3_softc *sc) 347 { 348 struct g_raid3_event *ep; 349 350 mtx_lock(&sc->sc_events_mtx); 351 ep = TAILQ_FIRST(&sc->sc_events); 352 mtx_unlock(&sc->sc_events_mtx); 353 return (ep); 354 } 355 356 static void 357 g_raid3_event_remove(struct g_raid3_softc *sc, struct g_raid3_event *ep) 358 { 359 360 mtx_lock(&sc->sc_events_mtx); 361 TAILQ_REMOVE(&sc->sc_events, ep, e_next); 362 mtx_unlock(&sc->sc_events_mtx); 363 } 364 365 static void 366 g_raid3_event_cancel(struct g_raid3_disk *disk) 367 { 368 struct g_raid3_softc *sc; 369 struct g_raid3_event *ep, *tmpep; 370 371 sc = disk->d_softc; 372 sx_assert(&sc->sc_lock, SX_XLOCKED); 373 374 mtx_lock(&sc->sc_events_mtx); 375 TAILQ_FOREACH_SAFE(ep, &sc->sc_events, e_next, tmpep) { 376 if ((ep->e_flags & G_RAID3_EVENT_DEVICE) != 0) 377 continue; 378 if (ep->e_disk != disk) 379 continue; 380 TAILQ_REMOVE(&sc->sc_events, ep, e_next); 381 if ((ep->e_flags & G_RAID3_EVENT_DONTWAIT) != 0) 382 g_raid3_event_free(ep); 383 else { 384 ep->e_error = ECANCELED; 385 wakeup(ep); 386 } 387 } 388 mtx_unlock(&sc->sc_events_mtx); 389 } 390 391 /* 392 * Return the number of disks in the given state. 393 * If state is equal to -1, count all connected disks. 394 */ 395 u_int 396 g_raid3_ndisks(struct g_raid3_softc *sc, int state) 397 { 398 struct g_raid3_disk *disk; 399 u_int n, ndisks; 400 401 sx_assert(&sc->sc_lock, SX_LOCKED); 402 403 for (n = ndisks = 0; n < sc->sc_ndisks; n++) { 404 disk = &sc->sc_disks[n]; 405 if (disk->d_state == G_RAID3_DISK_STATE_NODISK) 406 continue; 407 if (state == -1 || disk->d_state == state) 408 ndisks++; 409 } 410 return (ndisks); 411 } 412 413 static u_int 414 g_raid3_nrequests(struct g_raid3_softc *sc, struct g_consumer *cp) 415 { 416 struct bio *bp; 417 u_int nreqs = 0; 418 419 mtx_lock(&sc->sc_queue_mtx); 420 TAILQ_FOREACH(bp, &sc->sc_queue.queue, bio_queue) { 421 if (bp->bio_from == cp) 422 nreqs++; 423 } 424 mtx_unlock(&sc->sc_queue_mtx); 425 return (nreqs); 426 } 427 428 static int 429 g_raid3_is_busy(struct g_raid3_softc *sc, struct g_consumer *cp) 430 { 431 432 if (cp->index > 0) { 433 G_RAID3_DEBUG(2, 434 "I/O requests for %s exist, can't destroy it now.", 435 cp->provider->name); 436 return (1); 437 } 438 if (g_raid3_nrequests(sc, cp) > 0) { 439 G_RAID3_DEBUG(2, 440 "I/O requests for %s in queue, can't destroy it now.", 441 cp->provider->name); 442 return (1); 443 } 444 return (0); 445 } 446 447 static void 448 g_raid3_destroy_consumer(void *arg, int flags __unused) 449 { 450 struct g_consumer *cp; 451 452 g_topology_assert(); 453 454 cp = arg; 455 G_RAID3_DEBUG(1, "Consumer %s destroyed.", cp->provider->name); 456 g_detach(cp); 457 g_destroy_consumer(cp); 458 } 459 460 static void 461 g_raid3_kill_consumer(struct g_raid3_softc *sc, struct g_consumer *cp) 462 { 463 struct g_provider *pp; 464 int retaste_wait; 465 466 g_topology_assert(); 467 468 cp->private = NULL; 469 if (g_raid3_is_busy(sc, cp)) 470 return; 471 G_RAID3_DEBUG(2, "Consumer %s destroyed.", cp->provider->name); 472 pp = cp->provider; 473 retaste_wait = 0; 474 if (cp->acw == 1) { 475 if ((pp->geom->flags & G_GEOM_WITHER) == 0) 476 retaste_wait = 1; 477 } 478 G_RAID3_DEBUG(2, "Access %s r%dw%de%d = %d", pp->name, -cp->acr, 479 -cp->acw, -cp->ace, 0); 480 if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0) 481 g_access(cp, -cp->acr, -cp->acw, -cp->ace); 482 if (retaste_wait) { 483 /* 484 * After retaste event was send (inside g_access()), we can send 485 * event to detach and destroy consumer. 486 * A class, which has consumer to the given provider connected 487 * will not receive retaste event for the provider. 488 * This is the way how I ignore retaste events when I close 489 * consumers opened for write: I detach and destroy consumer 490 * after retaste event is sent. 491 */ 492 g_post_event(g_raid3_destroy_consumer, cp, M_WAITOK, NULL); 493 return; 494 } 495 G_RAID3_DEBUG(1, "Consumer %s destroyed.", pp->name); 496 g_detach(cp); 497 g_destroy_consumer(cp); 498 } 499 500 static int 501 g_raid3_connect_disk(struct g_raid3_disk *disk, struct g_provider *pp) 502 { 503 struct g_consumer *cp; 504 int error; 505 506 g_topology_assert_not(); 507 KASSERT(disk->d_consumer == NULL, 508 ("Disk already connected (device %s).", disk->d_softc->sc_name)); 509 510 g_topology_lock(); 511 cp = g_new_consumer(disk->d_softc->sc_geom); 512 error = g_attach(cp, pp); 513 if (error != 0) { 514 g_destroy_consumer(cp); 515 g_topology_unlock(); 516 return (error); 517 } 518 error = g_access(cp, 1, 1, 1); 519 g_topology_unlock(); 520 if (error != 0) { 521 g_detach(cp); 522 g_destroy_consumer(cp); 523 G_RAID3_DEBUG(0, "Cannot open consumer %s (error=%d).", 524 pp->name, error); 525 return (error); 526 } 527 disk->d_consumer = cp; 528 disk->d_consumer->private = disk; 529 disk->d_consumer->index = 0; 530 G_RAID3_DEBUG(2, "Disk %s connected.", g_raid3_get_diskname(disk)); 531 return (0); 532 } 533 534 static void 535 g_raid3_disconnect_consumer(struct g_raid3_softc *sc, struct g_consumer *cp) 536 { 537 538 g_topology_assert(); 539 540 if (cp == NULL) 541 return; 542 if (cp->provider != NULL) 543 g_raid3_kill_consumer(sc, cp); 544 else 545 g_destroy_consumer(cp); 546 } 547 548 /* 549 * Initialize disk. This means allocate memory, create consumer, attach it 550 * to the provider and open access (r1w1e1) to it. 551 */ 552 static struct g_raid3_disk * 553 g_raid3_init_disk(struct g_raid3_softc *sc, struct g_provider *pp, 554 struct g_raid3_metadata *md, int *errorp) 555 { 556 struct g_raid3_disk *disk; 557 int error; 558 559 disk = &sc->sc_disks[md->md_no]; 560 error = g_raid3_connect_disk(disk, pp); 561 if (error != 0) { 562 if (errorp != NULL) 563 *errorp = error; 564 return (NULL); 565 } 566 disk->d_state = G_RAID3_DISK_STATE_NONE; 567 disk->d_flags = md->md_dflags; 568 error = g_getattr("GEOM::rotation_rate", disk->d_consumer, 569 &disk->d_rotation_rate); 570 if (error != 0) 571 disk->d_rotation_rate = DISK_RR_UNKNOWN; 572 if (md->md_provider[0] != '\0') 573 disk->d_flags |= G_RAID3_DISK_FLAG_HARDCODED; 574 disk->d_sync.ds_consumer = NULL; 575 disk->d_sync.ds_offset = md->md_sync_offset; 576 disk->d_sync.ds_offset_done = md->md_sync_offset; 577 disk->d_genid = md->md_genid; 578 disk->d_sync.ds_syncid = md->md_syncid; 579 if (errorp != NULL) 580 *errorp = 0; 581 return (disk); 582 } 583 584 static void 585 g_raid3_destroy_disk(struct g_raid3_disk *disk) 586 { 587 struct g_raid3_softc *sc; 588 589 g_topology_assert_not(); 590 sc = disk->d_softc; 591 sx_assert(&sc->sc_lock, SX_XLOCKED); 592 593 if (disk->d_state == G_RAID3_DISK_STATE_NODISK) 594 return; 595 g_raid3_event_cancel(disk); 596 switch (disk->d_state) { 597 case G_RAID3_DISK_STATE_SYNCHRONIZING: 598 if (sc->sc_syncdisk != NULL) 599 g_raid3_sync_stop(sc, 1); 600 /* FALLTHROUGH */ 601 case G_RAID3_DISK_STATE_NEW: 602 case G_RAID3_DISK_STATE_STALE: 603 case G_RAID3_DISK_STATE_ACTIVE: 604 g_topology_lock(); 605 g_raid3_disconnect_consumer(sc, disk->d_consumer); 606 g_topology_unlock(); 607 disk->d_consumer = NULL; 608 break; 609 default: 610 KASSERT(0 == 1, ("Wrong disk state (%s, %s).", 611 g_raid3_get_diskname(disk), 612 g_raid3_disk_state2str(disk->d_state))); 613 } 614 disk->d_state = G_RAID3_DISK_STATE_NODISK; 615 } 616 617 static void 618 g_raid3_free_device(struct g_raid3_softc *sc) 619 { 620 KASSERT(sc->sc_refcnt == 0, 621 ("%s: non-zero refcount %u", __func__, sc->sc_refcnt)); 622 623 if (!g_raid3_use_malloc) { 624 uma_zdestroy(sc->sc_zones[G_RAID3_ZONE_64K].sz_zone); 625 uma_zdestroy(sc->sc_zones[G_RAID3_ZONE_16K].sz_zone); 626 uma_zdestroy(sc->sc_zones[G_RAID3_ZONE_4K].sz_zone); 627 } 628 mtx_destroy(&sc->sc_queue_mtx); 629 mtx_destroy(&sc->sc_events_mtx); 630 sx_xunlock(&sc->sc_lock); 631 sx_destroy(&sc->sc_lock); 632 free(sc->sc_disks, M_RAID3); 633 free(sc, M_RAID3); 634 } 635 636 static void 637 g_raid3_providergone(struct g_provider *pp) 638 { 639 struct g_raid3_softc *sc = pp->private; 640 641 if (--sc->sc_refcnt == 0) 642 g_raid3_free_device(sc); 643 } 644 645 static void 646 g_raid3_destroy_device(struct g_raid3_softc *sc) 647 { 648 struct g_raid3_event *ep; 649 struct g_raid3_disk *disk; 650 struct g_geom *gp; 651 struct g_consumer *cp; 652 u_int n; 653 654 g_topology_assert_not(); 655 sx_assert(&sc->sc_lock, SX_XLOCKED); 656 657 gp = sc->sc_geom; 658 if (sc->sc_provider != NULL) 659 g_raid3_destroy_provider(sc); 660 for (n = 0; n < sc->sc_ndisks; n++) { 661 disk = &sc->sc_disks[n]; 662 if (disk->d_state != G_RAID3_DISK_STATE_NODISK) { 663 disk->d_flags &= ~G_RAID3_DISK_FLAG_DIRTY; 664 g_raid3_update_metadata(disk); 665 g_raid3_destroy_disk(disk); 666 } 667 } 668 while ((ep = g_raid3_event_get(sc)) != NULL) { 669 g_raid3_event_remove(sc, ep); 670 if ((ep->e_flags & G_RAID3_EVENT_DONTWAIT) != 0) 671 g_raid3_event_free(ep); 672 else { 673 ep->e_error = ECANCELED; 674 ep->e_flags |= G_RAID3_EVENT_DONE; 675 G_RAID3_DEBUG(4, "%s: Waking up %p.", __func__, ep); 676 mtx_lock(&sc->sc_events_mtx); 677 wakeup(ep); 678 mtx_unlock(&sc->sc_events_mtx); 679 } 680 } 681 g_raid3_timeout_drain(sc); 682 cp = LIST_FIRST(&sc->sc_sync.ds_geom->consumer); 683 g_topology_lock(); 684 if (cp != NULL) 685 g_raid3_disconnect_consumer(sc, cp); 686 g_wither_geom(sc->sc_sync.ds_geom, ENXIO); 687 G_RAID3_DEBUG(0, "Device %s destroyed.", gp->name); 688 g_wither_geom(gp, ENXIO); 689 if (--sc->sc_refcnt == 0) 690 g_raid3_free_device(sc); 691 g_topology_unlock(); 692 } 693 694 static void 695 g_raid3_orphan(struct g_consumer *cp) 696 { 697 struct g_raid3_disk *disk; 698 699 g_topology_assert(); 700 701 disk = cp->private; 702 if (disk == NULL) 703 return; 704 disk->d_softc->sc_bump_id = G_RAID3_BUMP_SYNCID; 705 g_raid3_event_send(disk, G_RAID3_DISK_STATE_DISCONNECTED, 706 G_RAID3_EVENT_DONTWAIT); 707 } 708 709 static int 710 g_raid3_write_metadata(struct g_raid3_disk *disk, struct g_raid3_metadata *md) 711 { 712 struct g_raid3_softc *sc; 713 struct g_consumer *cp; 714 off_t offset, length; 715 u_char *sector; 716 int error = 0; 717 718 g_topology_assert_not(); 719 sc = disk->d_softc; 720 sx_assert(&sc->sc_lock, SX_LOCKED); 721 722 cp = disk->d_consumer; 723 KASSERT(cp != NULL, ("NULL consumer (%s).", sc->sc_name)); 724 KASSERT(cp->provider != NULL, ("NULL provider (%s).", sc->sc_name)); 725 KASSERT(cp->acr >= 1 && cp->acw >= 1 && cp->ace >= 1, 726 ("Consumer %s closed? (r%dw%de%d).", cp->provider->name, cp->acr, 727 cp->acw, cp->ace)); 728 length = cp->provider->sectorsize; 729 offset = cp->provider->mediasize - length; 730 sector = malloc((size_t)length, M_RAID3, M_WAITOK | M_ZERO); 731 if (md != NULL) 732 raid3_metadata_encode(md, sector); 733 error = g_write_data(cp, offset, sector, length); 734 free(sector, M_RAID3); 735 if (error != 0) { 736 if ((disk->d_flags & G_RAID3_DISK_FLAG_BROKEN) == 0) { 737 G_RAID3_DEBUG(0, "Cannot write metadata on %s " 738 "(device=%s, error=%d).", 739 g_raid3_get_diskname(disk), sc->sc_name, error); 740 disk->d_flags |= G_RAID3_DISK_FLAG_BROKEN; 741 } else { 742 G_RAID3_DEBUG(1, "Cannot write metadata on %s " 743 "(device=%s, error=%d).", 744 g_raid3_get_diskname(disk), sc->sc_name, error); 745 } 746 if (g_raid3_disconnect_on_failure && 747 sc->sc_state == G_RAID3_DEVICE_STATE_COMPLETE) { 748 sc->sc_bump_id |= G_RAID3_BUMP_GENID; 749 g_raid3_event_send(disk, 750 G_RAID3_DISK_STATE_DISCONNECTED, 751 G_RAID3_EVENT_DONTWAIT); 752 } 753 } 754 return (error); 755 } 756 757 int 758 g_raid3_clear_metadata(struct g_raid3_disk *disk) 759 { 760 int error; 761 762 g_topology_assert_not(); 763 sx_assert(&disk->d_softc->sc_lock, SX_LOCKED); 764 765 error = g_raid3_write_metadata(disk, NULL); 766 if (error == 0) { 767 G_RAID3_DEBUG(2, "Metadata on %s cleared.", 768 g_raid3_get_diskname(disk)); 769 } else { 770 G_RAID3_DEBUG(0, 771 "Cannot clear metadata on disk %s (error=%d).", 772 g_raid3_get_diskname(disk), error); 773 } 774 return (error); 775 } 776 777 void 778 g_raid3_fill_metadata(struct g_raid3_disk *disk, struct g_raid3_metadata *md) 779 { 780 struct g_raid3_softc *sc; 781 struct g_provider *pp; 782 783 bzero(md, sizeof(*md)); 784 sc = disk->d_softc; 785 strlcpy(md->md_magic, G_RAID3_MAGIC, sizeof(md->md_magic)); 786 md->md_version = G_RAID3_VERSION; 787 strlcpy(md->md_name, sc->sc_name, sizeof(md->md_name)); 788 md->md_id = sc->sc_id; 789 md->md_all = sc->sc_ndisks; 790 md->md_genid = sc->sc_genid; 791 md->md_mediasize = sc->sc_mediasize; 792 md->md_sectorsize = sc->sc_sectorsize; 793 md->md_mflags = (sc->sc_flags & G_RAID3_DEVICE_FLAG_MASK); 794 md->md_no = disk->d_no; 795 md->md_syncid = disk->d_sync.ds_syncid; 796 md->md_dflags = (disk->d_flags & G_RAID3_DISK_FLAG_MASK); 797 if (disk->d_state == G_RAID3_DISK_STATE_SYNCHRONIZING) { 798 md->md_sync_offset = 799 disk->d_sync.ds_offset_done / (sc->sc_ndisks - 1); 800 } 801 if (disk->d_consumer != NULL && disk->d_consumer->provider != NULL) 802 pp = disk->d_consumer->provider; 803 else 804 pp = NULL; 805 if ((disk->d_flags & G_RAID3_DISK_FLAG_HARDCODED) != 0 && pp != NULL) 806 strlcpy(md->md_provider, pp->name, sizeof(md->md_provider)); 807 if (pp != NULL) 808 md->md_provsize = pp->mediasize; 809 } 810 811 void 812 g_raid3_update_metadata(struct g_raid3_disk *disk) 813 { 814 struct g_raid3_softc *sc __diagused; 815 struct g_raid3_metadata md; 816 int error; 817 818 g_topology_assert_not(); 819 sc = disk->d_softc; 820 sx_assert(&sc->sc_lock, SX_LOCKED); 821 822 g_raid3_fill_metadata(disk, &md); 823 error = g_raid3_write_metadata(disk, &md); 824 if (error == 0) { 825 G_RAID3_DEBUG(2, "Metadata on %s updated.", 826 g_raid3_get_diskname(disk)); 827 } else { 828 G_RAID3_DEBUG(0, 829 "Cannot update metadata on disk %s (error=%d).", 830 g_raid3_get_diskname(disk), error); 831 } 832 } 833 834 static void 835 g_raid3_bump_syncid(struct g_raid3_softc *sc) 836 { 837 struct g_raid3_disk *disk; 838 u_int n; 839 840 g_topology_assert_not(); 841 sx_assert(&sc->sc_lock, SX_XLOCKED); 842 KASSERT(g_raid3_ndisks(sc, G_RAID3_DISK_STATE_ACTIVE) > 0, 843 ("%s called with no active disks (device=%s).", __func__, 844 sc->sc_name)); 845 846 sc->sc_syncid++; 847 G_RAID3_DEBUG(1, "Device %s: syncid bumped to %u.", sc->sc_name, 848 sc->sc_syncid); 849 for (n = 0; n < sc->sc_ndisks; n++) { 850 disk = &sc->sc_disks[n]; 851 if (disk->d_state == G_RAID3_DISK_STATE_ACTIVE || 852 disk->d_state == G_RAID3_DISK_STATE_SYNCHRONIZING) { 853 disk->d_sync.ds_syncid = sc->sc_syncid; 854 g_raid3_update_metadata(disk); 855 } 856 } 857 } 858 859 static void 860 g_raid3_bump_genid(struct g_raid3_softc *sc) 861 { 862 struct g_raid3_disk *disk; 863 u_int n; 864 865 g_topology_assert_not(); 866 sx_assert(&sc->sc_lock, SX_XLOCKED); 867 KASSERT(g_raid3_ndisks(sc, G_RAID3_DISK_STATE_ACTIVE) > 0, 868 ("%s called with no active disks (device=%s).", __func__, 869 sc->sc_name)); 870 871 sc->sc_genid++; 872 G_RAID3_DEBUG(1, "Device %s: genid bumped to %u.", sc->sc_name, 873 sc->sc_genid); 874 for (n = 0; n < sc->sc_ndisks; n++) { 875 disk = &sc->sc_disks[n]; 876 if (disk->d_state == G_RAID3_DISK_STATE_ACTIVE || 877 disk->d_state == G_RAID3_DISK_STATE_SYNCHRONIZING) { 878 disk->d_genid = sc->sc_genid; 879 g_raid3_update_metadata(disk); 880 } 881 } 882 } 883 884 static int 885 g_raid3_idle(struct g_raid3_softc *sc, int acw) 886 { 887 struct g_raid3_disk *disk; 888 u_int i; 889 int timeout; 890 891 g_topology_assert_not(); 892 sx_assert(&sc->sc_lock, SX_XLOCKED); 893 894 if (sc->sc_provider == NULL) 895 return (0); 896 if ((sc->sc_flags & G_RAID3_DEVICE_FLAG_NOFAILSYNC) != 0) 897 return (0); 898 if (sc->sc_idle) 899 return (0); 900 if (sc->sc_writes > 0) 901 return (0); 902 if (acw > 0 || (acw == -1 && sc->sc_provider->acw > 0)) { 903 timeout = g_raid3_idletime - (time_uptime - sc->sc_last_write); 904 if (!g_raid3_shutdown && timeout > 0) 905 return (timeout); 906 } 907 sc->sc_idle = 1; 908 for (i = 0; i < sc->sc_ndisks; i++) { 909 disk = &sc->sc_disks[i]; 910 if (disk->d_state != G_RAID3_DISK_STATE_ACTIVE) 911 continue; 912 G_RAID3_DEBUG(1, "Disk %s (device %s) marked as clean.", 913 g_raid3_get_diskname(disk), sc->sc_name); 914 disk->d_flags &= ~G_RAID3_DISK_FLAG_DIRTY; 915 g_raid3_update_metadata(disk); 916 } 917 return (0); 918 } 919 920 static void 921 g_raid3_unidle(struct g_raid3_softc *sc) 922 { 923 struct g_raid3_disk *disk; 924 u_int i; 925 926 g_topology_assert_not(); 927 sx_assert(&sc->sc_lock, SX_XLOCKED); 928 929 if ((sc->sc_flags & G_RAID3_DEVICE_FLAG_NOFAILSYNC) != 0) 930 return; 931 sc->sc_idle = 0; 932 sc->sc_last_write = time_uptime; 933 for (i = 0; i < sc->sc_ndisks; i++) { 934 disk = &sc->sc_disks[i]; 935 if (disk->d_state != G_RAID3_DISK_STATE_ACTIVE) 936 continue; 937 G_RAID3_DEBUG(1, "Disk %s (device %s) marked as dirty.", 938 g_raid3_get_diskname(disk), sc->sc_name); 939 disk->d_flags |= G_RAID3_DISK_FLAG_DIRTY; 940 g_raid3_update_metadata(disk); 941 } 942 } 943 944 /* 945 * Treat bio_driver1 field in parent bio as list head and field bio_caller1 946 * in child bio as pointer to the next element on the list. 947 */ 948 #define G_RAID3_HEAD_BIO(pbp) (pbp)->bio_driver1 949 950 #define G_RAID3_NEXT_BIO(cbp) (cbp)->bio_caller1 951 952 #define G_RAID3_FOREACH_BIO(pbp, bp) \ 953 for ((bp) = G_RAID3_HEAD_BIO(pbp); (bp) != NULL; \ 954 (bp) = G_RAID3_NEXT_BIO(bp)) 955 956 #define G_RAID3_FOREACH_SAFE_BIO(pbp, bp, tmpbp) \ 957 for ((bp) = G_RAID3_HEAD_BIO(pbp); \ 958 (bp) != NULL && ((tmpbp) = G_RAID3_NEXT_BIO(bp), 1); \ 959 (bp) = (tmpbp)) 960 961 static void 962 g_raid3_init_bio(struct bio *pbp) 963 { 964 965 G_RAID3_HEAD_BIO(pbp) = NULL; 966 } 967 968 static void 969 g_raid3_remove_bio(struct bio *cbp) 970 { 971 struct bio *pbp, *bp; 972 973 pbp = cbp->bio_parent; 974 if (G_RAID3_HEAD_BIO(pbp) == cbp) 975 G_RAID3_HEAD_BIO(pbp) = G_RAID3_NEXT_BIO(cbp); 976 else { 977 G_RAID3_FOREACH_BIO(pbp, bp) { 978 if (G_RAID3_NEXT_BIO(bp) == cbp) { 979 G_RAID3_NEXT_BIO(bp) = G_RAID3_NEXT_BIO(cbp); 980 break; 981 } 982 } 983 } 984 G_RAID3_NEXT_BIO(cbp) = NULL; 985 } 986 987 static void 988 g_raid3_replace_bio(struct bio *sbp, struct bio *dbp) 989 { 990 struct bio *pbp, *bp; 991 992 g_raid3_remove_bio(sbp); 993 pbp = dbp->bio_parent; 994 G_RAID3_NEXT_BIO(sbp) = G_RAID3_NEXT_BIO(dbp); 995 if (G_RAID3_HEAD_BIO(pbp) == dbp) 996 G_RAID3_HEAD_BIO(pbp) = sbp; 997 else { 998 G_RAID3_FOREACH_BIO(pbp, bp) { 999 if (G_RAID3_NEXT_BIO(bp) == dbp) { 1000 G_RAID3_NEXT_BIO(bp) = sbp; 1001 break; 1002 } 1003 } 1004 } 1005 G_RAID3_NEXT_BIO(dbp) = NULL; 1006 } 1007 1008 static void 1009 g_raid3_destroy_bio(struct g_raid3_softc *sc, struct bio *cbp) 1010 { 1011 struct bio *bp, *pbp; 1012 size_t size; 1013 1014 pbp = cbp->bio_parent; 1015 pbp->bio_children--; 1016 KASSERT(cbp->bio_data != NULL, ("NULL bio_data")); 1017 size = pbp->bio_length / (sc->sc_ndisks - 1); 1018 g_raid3_free(sc, cbp->bio_data, size); 1019 if (G_RAID3_HEAD_BIO(pbp) == cbp) { 1020 G_RAID3_HEAD_BIO(pbp) = G_RAID3_NEXT_BIO(cbp); 1021 G_RAID3_NEXT_BIO(cbp) = NULL; 1022 g_destroy_bio(cbp); 1023 } else { 1024 G_RAID3_FOREACH_BIO(pbp, bp) { 1025 if (G_RAID3_NEXT_BIO(bp) == cbp) 1026 break; 1027 } 1028 if (bp != NULL) { 1029 KASSERT(G_RAID3_NEXT_BIO(bp) != NULL, 1030 ("NULL bp->bio_driver1")); 1031 G_RAID3_NEXT_BIO(bp) = G_RAID3_NEXT_BIO(cbp); 1032 G_RAID3_NEXT_BIO(cbp) = NULL; 1033 } 1034 g_destroy_bio(cbp); 1035 } 1036 } 1037 1038 static struct bio * 1039 g_raid3_clone_bio(struct g_raid3_softc *sc, struct bio *pbp) 1040 { 1041 struct bio *bp, *cbp; 1042 size_t size; 1043 int memflag; 1044 1045 cbp = g_clone_bio(pbp); 1046 if (cbp == NULL) 1047 return (NULL); 1048 size = pbp->bio_length / (sc->sc_ndisks - 1); 1049 if ((pbp->bio_cflags & G_RAID3_BIO_CFLAG_REGULAR) != 0) 1050 memflag = M_WAITOK; 1051 else 1052 memflag = M_NOWAIT; 1053 cbp->bio_data = g_raid3_alloc(sc, size, memflag); 1054 if (cbp->bio_data == NULL) { 1055 pbp->bio_children--; 1056 g_destroy_bio(cbp); 1057 return (NULL); 1058 } 1059 G_RAID3_NEXT_BIO(cbp) = NULL; 1060 if (G_RAID3_HEAD_BIO(pbp) == NULL) 1061 G_RAID3_HEAD_BIO(pbp) = cbp; 1062 else { 1063 G_RAID3_FOREACH_BIO(pbp, bp) { 1064 if (G_RAID3_NEXT_BIO(bp) == NULL) { 1065 G_RAID3_NEXT_BIO(bp) = cbp; 1066 break; 1067 } 1068 } 1069 } 1070 return (cbp); 1071 } 1072 1073 static void 1074 g_raid3_scatter(struct bio *pbp) 1075 { 1076 struct g_raid3_softc *sc; 1077 struct g_raid3_disk *disk; 1078 struct bio *bp, *cbp, *tmpbp; 1079 off_t atom, cadd, padd, left; 1080 int first; 1081 1082 sc = pbp->bio_to->private; 1083 bp = NULL; 1084 if ((pbp->bio_pflags & G_RAID3_BIO_PFLAG_NOPARITY) == 0) { 1085 /* 1086 * Find bio for which we should calculate data. 1087 */ 1088 G_RAID3_FOREACH_BIO(pbp, cbp) { 1089 if ((cbp->bio_cflags & G_RAID3_BIO_CFLAG_PARITY) != 0) { 1090 bp = cbp; 1091 break; 1092 } 1093 } 1094 KASSERT(bp != NULL, ("NULL parity bio.")); 1095 } 1096 atom = sc->sc_sectorsize / (sc->sc_ndisks - 1); 1097 cadd = padd = 0; 1098 for (left = pbp->bio_length; left > 0; left -= sc->sc_sectorsize) { 1099 G_RAID3_FOREACH_BIO(pbp, cbp) { 1100 if (cbp == bp) 1101 continue; 1102 bcopy(pbp->bio_data + padd, cbp->bio_data + cadd, atom); 1103 padd += atom; 1104 } 1105 cadd += atom; 1106 } 1107 if ((pbp->bio_pflags & G_RAID3_BIO_PFLAG_NOPARITY) == 0) { 1108 /* 1109 * Calculate parity. 1110 */ 1111 first = 1; 1112 G_RAID3_FOREACH_SAFE_BIO(pbp, cbp, tmpbp) { 1113 if (cbp == bp) 1114 continue; 1115 if (first) { 1116 bcopy(cbp->bio_data, bp->bio_data, 1117 bp->bio_length); 1118 first = 0; 1119 } else { 1120 g_raid3_xor(cbp->bio_data, bp->bio_data, 1121 bp->bio_length); 1122 } 1123 if ((cbp->bio_cflags & G_RAID3_BIO_CFLAG_NODISK) != 0) 1124 g_raid3_destroy_bio(sc, cbp); 1125 } 1126 } 1127 G_RAID3_FOREACH_SAFE_BIO(pbp, cbp, tmpbp) { 1128 struct g_consumer *cp; 1129 1130 disk = cbp->bio_caller2; 1131 cp = disk->d_consumer; 1132 cbp->bio_to = cp->provider; 1133 G_RAID3_LOGREQ(3, cbp, "Sending request."); 1134 KASSERT(cp->acr >= 1 && cp->acw >= 1 && cp->ace >= 1, 1135 ("Consumer %s not opened (r%dw%de%d).", cp->provider->name, 1136 cp->acr, cp->acw, cp->ace)); 1137 cp->index++; 1138 sc->sc_writes++; 1139 g_io_request(cbp, cp); 1140 } 1141 } 1142 1143 static void 1144 g_raid3_gather(struct bio *pbp) 1145 { 1146 struct g_raid3_softc *sc; 1147 struct g_raid3_disk *disk; 1148 struct bio *xbp, *fbp, *cbp; 1149 off_t atom, cadd, padd, left; 1150 1151 sc = pbp->bio_to->private; 1152 /* 1153 * Find bio for which we have to calculate data. 1154 * While going through this path, check if all requests 1155 * succeeded, if not, deny whole request. 1156 * If we're in COMPLETE mode, we allow one request to fail, 1157 * so if we find one, we're sending it to the parity consumer. 1158 * If there are more failed requests, we deny whole request. 1159 */ 1160 xbp = fbp = NULL; 1161 G_RAID3_FOREACH_BIO(pbp, cbp) { 1162 if ((cbp->bio_cflags & G_RAID3_BIO_CFLAG_PARITY) != 0) { 1163 KASSERT(xbp == NULL, ("More than one parity bio.")); 1164 xbp = cbp; 1165 } 1166 if (cbp->bio_error == 0) 1167 continue; 1168 /* 1169 * Found failed request. 1170 */ 1171 if (fbp == NULL) { 1172 if ((pbp->bio_pflags & G_RAID3_BIO_PFLAG_DEGRADED) != 0) { 1173 /* 1174 * We are already in degraded mode, so we can't 1175 * accept any failures. 1176 */ 1177 if (pbp->bio_error == 0) 1178 pbp->bio_error = cbp->bio_error; 1179 } else { 1180 fbp = cbp; 1181 } 1182 } else { 1183 /* 1184 * Next failed request, that's too many. 1185 */ 1186 if (pbp->bio_error == 0) 1187 pbp->bio_error = fbp->bio_error; 1188 } 1189 disk = cbp->bio_caller2; 1190 if (disk == NULL) 1191 continue; 1192 if ((disk->d_flags & G_RAID3_DISK_FLAG_BROKEN) == 0) { 1193 disk->d_flags |= G_RAID3_DISK_FLAG_BROKEN; 1194 G_RAID3_LOGREQ(0, cbp, "Request failed (error=%d).", 1195 cbp->bio_error); 1196 } else { 1197 G_RAID3_LOGREQ(1, cbp, "Request failed (error=%d).", 1198 cbp->bio_error); 1199 } 1200 if (g_raid3_disconnect_on_failure && 1201 sc->sc_state == G_RAID3_DEVICE_STATE_COMPLETE) { 1202 sc->sc_bump_id |= G_RAID3_BUMP_GENID; 1203 g_raid3_event_send(disk, 1204 G_RAID3_DISK_STATE_DISCONNECTED, 1205 G_RAID3_EVENT_DONTWAIT); 1206 } 1207 } 1208 if (pbp->bio_error != 0) 1209 goto finish; 1210 if (fbp != NULL && (pbp->bio_pflags & G_RAID3_BIO_PFLAG_VERIFY) != 0) { 1211 pbp->bio_pflags &= ~G_RAID3_BIO_PFLAG_VERIFY; 1212 if (xbp != fbp) 1213 g_raid3_replace_bio(xbp, fbp); 1214 g_raid3_destroy_bio(sc, fbp); 1215 } else if (fbp != NULL) { 1216 struct g_consumer *cp; 1217 1218 /* 1219 * One request failed, so send the same request to 1220 * the parity consumer. 1221 */ 1222 disk = pbp->bio_driver2; 1223 if (disk->d_state != G_RAID3_DISK_STATE_ACTIVE) { 1224 pbp->bio_error = fbp->bio_error; 1225 goto finish; 1226 } 1227 pbp->bio_pflags |= G_RAID3_BIO_PFLAG_DEGRADED; 1228 pbp->bio_inbed--; 1229 fbp->bio_flags &= ~(BIO_DONE | BIO_ERROR); 1230 if (disk->d_no == sc->sc_ndisks - 1) 1231 fbp->bio_cflags |= G_RAID3_BIO_CFLAG_PARITY; 1232 fbp->bio_error = 0; 1233 fbp->bio_completed = 0; 1234 fbp->bio_children = 0; 1235 fbp->bio_inbed = 0; 1236 cp = disk->d_consumer; 1237 fbp->bio_caller2 = disk; 1238 fbp->bio_to = cp->provider; 1239 G_RAID3_LOGREQ(3, fbp, "Sending request (recover)."); 1240 KASSERT(cp->acr >= 1 && cp->acw >= 1 && cp->ace >= 1, 1241 ("Consumer %s not opened (r%dw%de%d).", cp->provider->name, 1242 cp->acr, cp->acw, cp->ace)); 1243 cp->index++; 1244 g_io_request(fbp, cp); 1245 return; 1246 } 1247 if (xbp != NULL) { 1248 /* 1249 * Calculate parity. 1250 */ 1251 G_RAID3_FOREACH_BIO(pbp, cbp) { 1252 if ((cbp->bio_cflags & G_RAID3_BIO_CFLAG_PARITY) != 0) 1253 continue; 1254 g_raid3_xor(cbp->bio_data, xbp->bio_data, 1255 xbp->bio_length); 1256 } 1257 xbp->bio_cflags &= ~G_RAID3_BIO_CFLAG_PARITY; 1258 if ((pbp->bio_pflags & G_RAID3_BIO_PFLAG_VERIFY) != 0) { 1259 if (!g_raid3_is_zero(xbp)) { 1260 g_raid3_parity_mismatch++; 1261 pbp->bio_error = EIO; 1262 goto finish; 1263 } 1264 g_raid3_destroy_bio(sc, xbp); 1265 } 1266 } 1267 atom = sc->sc_sectorsize / (sc->sc_ndisks - 1); 1268 cadd = padd = 0; 1269 for (left = pbp->bio_length; left > 0; left -= sc->sc_sectorsize) { 1270 G_RAID3_FOREACH_BIO(pbp, cbp) { 1271 bcopy(cbp->bio_data + cadd, pbp->bio_data + padd, atom); 1272 pbp->bio_completed += atom; 1273 padd += atom; 1274 } 1275 cadd += atom; 1276 } 1277 finish: 1278 if (pbp->bio_error == 0) 1279 G_RAID3_LOGREQ(3, pbp, "Request finished."); 1280 else { 1281 if ((pbp->bio_pflags & G_RAID3_BIO_PFLAG_VERIFY) != 0) 1282 G_RAID3_LOGREQ(1, pbp, "Verification error."); 1283 else 1284 G_RAID3_LOGREQ(0, pbp, "Request failed."); 1285 } 1286 pbp->bio_pflags &= ~G_RAID3_BIO_PFLAG_MASK; 1287 while ((cbp = G_RAID3_HEAD_BIO(pbp)) != NULL) 1288 g_raid3_destroy_bio(sc, cbp); 1289 g_io_deliver(pbp, pbp->bio_error); 1290 } 1291 1292 static void 1293 g_raid3_done(struct bio *bp) 1294 { 1295 struct g_raid3_softc *sc; 1296 1297 sc = bp->bio_from->geom->softc; 1298 bp->bio_cflags |= G_RAID3_BIO_CFLAG_REGULAR; 1299 G_RAID3_LOGREQ(3, bp, "Regular request done (error=%d).", bp->bio_error); 1300 mtx_lock(&sc->sc_queue_mtx); 1301 bioq_insert_head(&sc->sc_queue, bp); 1302 mtx_unlock(&sc->sc_queue_mtx); 1303 wakeup(sc); 1304 wakeup(&sc->sc_queue); 1305 } 1306 1307 static void 1308 g_raid3_regular_request(struct bio *cbp) 1309 { 1310 struct g_raid3_softc *sc; 1311 struct g_raid3_disk *disk; 1312 struct bio *pbp; 1313 1314 g_topology_assert_not(); 1315 1316 pbp = cbp->bio_parent; 1317 sc = pbp->bio_to->private; 1318 cbp->bio_from->index--; 1319 if (cbp->bio_cmd == BIO_WRITE) 1320 sc->sc_writes--; 1321 disk = cbp->bio_from->private; 1322 if (disk == NULL) { 1323 g_topology_lock(); 1324 g_raid3_kill_consumer(sc, cbp->bio_from); 1325 g_topology_unlock(); 1326 } 1327 1328 G_RAID3_LOGREQ(3, cbp, "Request finished."); 1329 pbp->bio_inbed++; 1330 KASSERT(pbp->bio_inbed <= pbp->bio_children, 1331 ("bio_inbed (%u) is bigger than bio_children (%u).", pbp->bio_inbed, 1332 pbp->bio_children)); 1333 if (pbp->bio_inbed != pbp->bio_children) 1334 return; 1335 switch (pbp->bio_cmd) { 1336 case BIO_READ: 1337 g_raid3_gather(pbp); 1338 break; 1339 case BIO_WRITE: 1340 case BIO_DELETE: 1341 { 1342 int error = 0; 1343 1344 pbp->bio_completed = pbp->bio_length; 1345 while ((cbp = G_RAID3_HEAD_BIO(pbp)) != NULL) { 1346 if (cbp->bio_error == 0) { 1347 g_raid3_destroy_bio(sc, cbp); 1348 continue; 1349 } 1350 1351 if (error == 0) 1352 error = cbp->bio_error; 1353 else if (pbp->bio_error == 0) { 1354 /* 1355 * Next failed request, that's too many. 1356 */ 1357 pbp->bio_error = error; 1358 } 1359 1360 disk = cbp->bio_caller2; 1361 if (disk == NULL) { 1362 g_raid3_destroy_bio(sc, cbp); 1363 continue; 1364 } 1365 1366 if ((disk->d_flags & G_RAID3_DISK_FLAG_BROKEN) == 0) { 1367 disk->d_flags |= G_RAID3_DISK_FLAG_BROKEN; 1368 G_RAID3_LOGREQ(0, cbp, 1369 "Request failed (error=%d).", 1370 cbp->bio_error); 1371 } else { 1372 G_RAID3_LOGREQ(1, cbp, 1373 "Request failed (error=%d).", 1374 cbp->bio_error); 1375 } 1376 if (g_raid3_disconnect_on_failure && 1377 sc->sc_state == G_RAID3_DEVICE_STATE_COMPLETE) { 1378 sc->sc_bump_id |= G_RAID3_BUMP_GENID; 1379 g_raid3_event_send(disk, 1380 G_RAID3_DISK_STATE_DISCONNECTED, 1381 G_RAID3_EVENT_DONTWAIT); 1382 } 1383 g_raid3_destroy_bio(sc, cbp); 1384 } 1385 if (pbp->bio_error == 0) 1386 G_RAID3_LOGREQ(3, pbp, "Request finished."); 1387 else 1388 G_RAID3_LOGREQ(0, pbp, "Request failed."); 1389 pbp->bio_pflags &= ~G_RAID3_BIO_PFLAG_DEGRADED; 1390 pbp->bio_pflags &= ~G_RAID3_BIO_PFLAG_NOPARITY; 1391 bioq_remove(&sc->sc_inflight, pbp); 1392 /* Release delayed sync requests if possible. */ 1393 g_raid3_sync_release(sc); 1394 g_io_deliver(pbp, pbp->bio_error); 1395 break; 1396 } 1397 } 1398 } 1399 1400 static void 1401 g_raid3_sync_done(struct bio *bp) 1402 { 1403 struct g_raid3_softc *sc; 1404 1405 G_RAID3_LOGREQ(3, bp, "Synchronization request delivered."); 1406 sc = bp->bio_from->geom->softc; 1407 bp->bio_cflags |= G_RAID3_BIO_CFLAG_SYNC; 1408 mtx_lock(&sc->sc_queue_mtx); 1409 bioq_insert_head(&sc->sc_queue, bp); 1410 mtx_unlock(&sc->sc_queue_mtx); 1411 wakeup(sc); 1412 wakeup(&sc->sc_queue); 1413 } 1414 1415 static void 1416 g_raid3_flush(struct g_raid3_softc *sc, struct bio *bp) 1417 { 1418 struct bio_queue_head queue; 1419 struct g_raid3_disk *disk; 1420 struct g_consumer *cp __diagused; 1421 struct bio *cbp; 1422 u_int i; 1423 1424 bioq_init(&queue); 1425 for (i = 0; i < sc->sc_ndisks; i++) { 1426 disk = &sc->sc_disks[i]; 1427 if (disk->d_state != G_RAID3_DISK_STATE_ACTIVE) 1428 continue; 1429 cbp = g_clone_bio(bp); 1430 if (cbp == NULL) { 1431 for (cbp = bioq_first(&queue); cbp != NULL; 1432 cbp = bioq_first(&queue)) { 1433 bioq_remove(&queue, cbp); 1434 g_destroy_bio(cbp); 1435 } 1436 if (bp->bio_error == 0) 1437 bp->bio_error = ENOMEM; 1438 g_io_deliver(bp, bp->bio_error); 1439 return; 1440 } 1441 bioq_insert_tail(&queue, cbp); 1442 cbp->bio_done = g_std_done; 1443 cbp->bio_caller1 = disk; 1444 cbp->bio_to = disk->d_consumer->provider; 1445 } 1446 for (cbp = bioq_first(&queue); cbp != NULL; cbp = bioq_first(&queue)) { 1447 bioq_remove(&queue, cbp); 1448 G_RAID3_LOGREQ(3, cbp, "Sending request."); 1449 disk = cbp->bio_caller1; 1450 cbp->bio_caller1 = NULL; 1451 cp = disk->d_consumer; 1452 KASSERT(cp->acr >= 1 && cp->acw >= 1 && cp->ace >= 1, 1453 ("Consumer %s not opened (r%dw%de%d).", cp->provider->name, 1454 cp->acr, cp->acw, cp->ace)); 1455 g_io_request(cbp, disk->d_consumer); 1456 } 1457 } 1458 1459 static void 1460 g_raid3_rotation_rate(struct g_raid3_softc *sc, struct bio *bp) 1461 { 1462 struct g_raid3_disk *disk; 1463 bool first = true; 1464 uint16_t rr = DISK_RR_UNKNOWN; 1465 u_int n; 1466 1467 for (n = 0; n < sc->sc_ndisks; n++) { 1468 disk = &sc->sc_disks[n]; 1469 if (disk->d_state == G_RAID3_DISK_STATE_NODISK) 1470 continue; 1471 if (first) 1472 rr = disk->d_rotation_rate; 1473 else if (rr != disk->d_rotation_rate) { 1474 rr = DISK_RR_UNKNOWN; 1475 break; 1476 } 1477 first = false; 1478 } 1479 g_handleattr(bp, "GEOM::rotation_rate", &rr, sizeof(rr)); 1480 } 1481 1482 static void 1483 g_raid3_start(struct bio *bp) 1484 { 1485 struct g_raid3_softc *sc; 1486 1487 sc = bp->bio_to->private; 1488 /* 1489 * If sc == NULL or there are no valid disks, provider's error 1490 * should be set and g_raid3_start() should not be called at all. 1491 */ 1492 KASSERT(sc != NULL && (sc->sc_state == G_RAID3_DEVICE_STATE_DEGRADED || 1493 sc->sc_state == G_RAID3_DEVICE_STATE_COMPLETE), 1494 ("Provider's error should be set (error=%d)(device=%s).", 1495 bp->bio_to->error, bp->bio_to->name)); 1496 G_RAID3_LOGREQ(3, bp, "Request received."); 1497 1498 switch (bp->bio_cmd) { 1499 case BIO_READ: 1500 case BIO_WRITE: 1501 case BIO_DELETE: 1502 break; 1503 case BIO_SPEEDUP: 1504 case BIO_FLUSH: 1505 g_raid3_flush(sc, bp); 1506 return; 1507 case BIO_GETATTR: 1508 if (!strcmp(bp->bio_attribute, "GEOM::rotation_rate")) { 1509 g_raid3_rotation_rate(sc, bp); 1510 return; 1511 } 1512 /* FALLTHROUGH */ 1513 default: 1514 g_io_deliver(bp, EOPNOTSUPP); 1515 return; 1516 } 1517 mtx_lock(&sc->sc_queue_mtx); 1518 bioq_insert_tail(&sc->sc_queue, bp); 1519 mtx_unlock(&sc->sc_queue_mtx); 1520 G_RAID3_DEBUG(4, "%s: Waking up %p.", __func__, sc); 1521 wakeup(sc); 1522 } 1523 1524 /* 1525 * Return TRUE if the given request is colliding with a in-progress 1526 * synchronization request. 1527 */ 1528 static int 1529 g_raid3_sync_collision(struct g_raid3_softc *sc, struct bio *bp) 1530 { 1531 struct g_raid3_disk *disk; 1532 struct bio *sbp; 1533 off_t rstart, rend, sstart, send; 1534 int i; 1535 1536 disk = sc->sc_syncdisk; 1537 if (disk == NULL) 1538 return (0); 1539 rstart = bp->bio_offset; 1540 rend = bp->bio_offset + bp->bio_length; 1541 for (i = 0; i < g_raid3_syncreqs; i++) { 1542 sbp = disk->d_sync.ds_bios[i]; 1543 if (sbp == NULL) 1544 continue; 1545 sstart = sbp->bio_offset; 1546 send = sbp->bio_length; 1547 if (sbp->bio_cmd == BIO_WRITE) { 1548 sstart *= sc->sc_ndisks - 1; 1549 send *= sc->sc_ndisks - 1; 1550 } 1551 send += sstart; 1552 if (rend > sstart && rstart < send) 1553 return (1); 1554 } 1555 return (0); 1556 } 1557 1558 /* 1559 * Return TRUE if the given sync request is colliding with a in-progress regular 1560 * request. 1561 */ 1562 static int 1563 g_raid3_regular_collision(struct g_raid3_softc *sc, struct bio *sbp) 1564 { 1565 off_t rstart, rend, sstart, send; 1566 struct bio *bp; 1567 1568 if (sc->sc_syncdisk == NULL) 1569 return (0); 1570 sstart = sbp->bio_offset; 1571 send = sstart + sbp->bio_length; 1572 TAILQ_FOREACH(bp, &sc->sc_inflight.queue, bio_queue) { 1573 rstart = bp->bio_offset; 1574 rend = bp->bio_offset + bp->bio_length; 1575 if (rend > sstart && rstart < send) 1576 return (1); 1577 } 1578 return (0); 1579 } 1580 1581 /* 1582 * Puts request onto delayed queue. 1583 */ 1584 static void 1585 g_raid3_regular_delay(struct g_raid3_softc *sc, struct bio *bp) 1586 { 1587 1588 G_RAID3_LOGREQ(2, bp, "Delaying request."); 1589 bioq_insert_head(&sc->sc_regular_delayed, bp); 1590 } 1591 1592 /* 1593 * Puts synchronization request onto delayed queue. 1594 */ 1595 static void 1596 g_raid3_sync_delay(struct g_raid3_softc *sc, struct bio *bp) 1597 { 1598 1599 G_RAID3_LOGREQ(2, bp, "Delaying synchronization request."); 1600 bioq_insert_tail(&sc->sc_sync_delayed, bp); 1601 } 1602 1603 /* 1604 * Releases delayed regular requests which don't collide anymore with sync 1605 * requests. 1606 */ 1607 static void 1608 g_raid3_regular_release(struct g_raid3_softc *sc) 1609 { 1610 struct bio *bp, *bp2; 1611 1612 TAILQ_FOREACH_SAFE(bp, &sc->sc_regular_delayed.queue, bio_queue, bp2) { 1613 if (g_raid3_sync_collision(sc, bp)) 1614 continue; 1615 bioq_remove(&sc->sc_regular_delayed, bp); 1616 G_RAID3_LOGREQ(2, bp, "Releasing delayed request (%p).", bp); 1617 mtx_lock(&sc->sc_queue_mtx); 1618 bioq_insert_head(&sc->sc_queue, bp); 1619 #if 0 1620 /* 1621 * wakeup() is not needed, because this function is called from 1622 * the worker thread. 1623 */ 1624 wakeup(&sc->sc_queue); 1625 #endif 1626 mtx_unlock(&sc->sc_queue_mtx); 1627 } 1628 } 1629 1630 /* 1631 * Releases delayed sync requests which don't collide anymore with regular 1632 * requests. 1633 */ 1634 static void 1635 g_raid3_sync_release(struct g_raid3_softc *sc) 1636 { 1637 struct bio *bp, *bp2; 1638 1639 TAILQ_FOREACH_SAFE(bp, &sc->sc_sync_delayed.queue, bio_queue, bp2) { 1640 if (g_raid3_regular_collision(sc, bp)) 1641 continue; 1642 bioq_remove(&sc->sc_sync_delayed, bp); 1643 G_RAID3_LOGREQ(2, bp, 1644 "Releasing delayed synchronization request."); 1645 g_io_request(bp, bp->bio_from); 1646 } 1647 } 1648 1649 /* 1650 * Handle synchronization requests. 1651 * Every synchronization request is two-steps process: first, READ request is 1652 * send to active provider and then WRITE request (with read data) to the provider 1653 * being synchronized. When WRITE is finished, new synchronization request is 1654 * send. 1655 */ 1656 static void 1657 g_raid3_sync_request(struct bio *bp) 1658 { 1659 struct g_raid3_softc *sc; 1660 struct g_raid3_disk *disk; 1661 1662 bp->bio_from->index--; 1663 sc = bp->bio_from->geom->softc; 1664 disk = bp->bio_from->private; 1665 if (disk == NULL) { 1666 sx_xunlock(&sc->sc_lock); /* Avoid recursion on sc_lock. */ 1667 g_topology_lock(); 1668 g_raid3_kill_consumer(sc, bp->bio_from); 1669 g_topology_unlock(); 1670 free(bp->bio_data, M_RAID3); 1671 g_destroy_bio(bp); 1672 sx_xlock(&sc->sc_lock); 1673 return; 1674 } 1675 1676 /* 1677 * Synchronization request. 1678 */ 1679 switch (bp->bio_cmd) { 1680 case BIO_READ: 1681 { 1682 struct g_consumer *cp; 1683 u_char *dst, *src; 1684 off_t left; 1685 u_int atom; 1686 1687 if (bp->bio_error != 0) { 1688 G_RAID3_LOGREQ(0, bp, 1689 "Synchronization request failed (error=%d).", 1690 bp->bio_error); 1691 g_destroy_bio(bp); 1692 return; 1693 } 1694 G_RAID3_LOGREQ(3, bp, "Synchronization request finished."); 1695 atom = sc->sc_sectorsize / (sc->sc_ndisks - 1); 1696 dst = src = bp->bio_data; 1697 if (disk->d_no == sc->sc_ndisks - 1) { 1698 u_int n; 1699 1700 /* Parity component. */ 1701 for (left = bp->bio_length; left > 0; 1702 left -= sc->sc_sectorsize) { 1703 bcopy(src, dst, atom); 1704 src += atom; 1705 for (n = 1; n < sc->sc_ndisks - 1; n++) { 1706 g_raid3_xor(src, dst, atom); 1707 src += atom; 1708 } 1709 dst += atom; 1710 } 1711 } else { 1712 /* Regular component. */ 1713 src += atom * disk->d_no; 1714 for (left = bp->bio_length; left > 0; 1715 left -= sc->sc_sectorsize) { 1716 bcopy(src, dst, atom); 1717 src += sc->sc_sectorsize; 1718 dst += atom; 1719 } 1720 } 1721 bp->bio_driver1 = bp->bio_driver2 = NULL; 1722 bp->bio_pflags = 0; 1723 bp->bio_offset /= sc->sc_ndisks - 1; 1724 bp->bio_length /= sc->sc_ndisks - 1; 1725 bp->bio_cmd = BIO_WRITE; 1726 bp->bio_cflags = 0; 1727 bp->bio_children = bp->bio_inbed = 0; 1728 cp = disk->d_consumer; 1729 KASSERT(cp->acr >= 1 && cp->acw >= 1 && cp->ace >= 1, 1730 ("Consumer %s not opened (r%dw%de%d).", cp->provider->name, 1731 cp->acr, cp->acw, cp->ace)); 1732 cp->index++; 1733 g_io_request(bp, cp); 1734 return; 1735 } 1736 case BIO_WRITE: 1737 { 1738 struct g_raid3_disk_sync *sync; 1739 off_t boffset, moffset; 1740 void *data; 1741 int i; 1742 1743 if (bp->bio_error != 0) { 1744 G_RAID3_LOGREQ(0, bp, 1745 "Synchronization request failed (error=%d).", 1746 bp->bio_error); 1747 g_destroy_bio(bp); 1748 sc->sc_bump_id |= G_RAID3_BUMP_GENID; 1749 g_raid3_event_send(disk, 1750 G_RAID3_DISK_STATE_DISCONNECTED, 1751 G_RAID3_EVENT_DONTWAIT); 1752 return; 1753 } 1754 G_RAID3_LOGREQ(3, bp, "Synchronization request finished."); 1755 sync = &disk->d_sync; 1756 if (sync->ds_offset == sc->sc_mediasize / (sc->sc_ndisks - 1) || 1757 sync->ds_consumer == NULL || 1758 (sc->sc_flags & G_RAID3_DEVICE_FLAG_DESTROY) != 0) { 1759 /* Don't send more synchronization requests. */ 1760 sync->ds_inflight--; 1761 if (sync->ds_bios != NULL) { 1762 i = (int)(uintptr_t)bp->bio_caller1; 1763 sync->ds_bios[i] = NULL; 1764 } 1765 free(bp->bio_data, M_RAID3); 1766 g_destroy_bio(bp); 1767 if (sync->ds_inflight > 0) 1768 return; 1769 if (sync->ds_consumer == NULL || 1770 (sc->sc_flags & G_RAID3_DEVICE_FLAG_DESTROY) != 0) { 1771 return; 1772 } 1773 /* 1774 * Disk up-to-date, activate it. 1775 */ 1776 g_raid3_event_send(disk, G_RAID3_DISK_STATE_ACTIVE, 1777 G_RAID3_EVENT_DONTWAIT); 1778 return; 1779 } 1780 1781 /* Send next synchronization request. */ 1782 data = bp->bio_data; 1783 g_reset_bio(bp); 1784 bp->bio_cmd = BIO_READ; 1785 bp->bio_offset = sync->ds_offset * (sc->sc_ndisks - 1); 1786 bp->bio_length = MIN(maxphys, sc->sc_mediasize - bp->bio_offset); 1787 sync->ds_offset += bp->bio_length / (sc->sc_ndisks - 1); 1788 bp->bio_done = g_raid3_sync_done; 1789 bp->bio_data = data; 1790 bp->bio_from = sync->ds_consumer; 1791 bp->bio_to = sc->sc_provider; 1792 G_RAID3_LOGREQ(3, bp, "Sending synchronization request."); 1793 sync->ds_consumer->index++; 1794 /* 1795 * Delay the request if it is colliding with a regular request. 1796 */ 1797 if (g_raid3_regular_collision(sc, bp)) 1798 g_raid3_sync_delay(sc, bp); 1799 else 1800 g_io_request(bp, sync->ds_consumer); 1801 1802 /* Release delayed requests if possible. */ 1803 g_raid3_regular_release(sc); 1804 1805 /* Find the smallest offset. */ 1806 moffset = sc->sc_mediasize; 1807 for (i = 0; i < g_raid3_syncreqs; i++) { 1808 bp = sync->ds_bios[i]; 1809 boffset = bp->bio_offset; 1810 if (bp->bio_cmd == BIO_WRITE) 1811 boffset *= sc->sc_ndisks - 1; 1812 if (boffset < moffset) 1813 moffset = boffset; 1814 } 1815 if (sync->ds_offset_done + maxphys * 100 < moffset) { 1816 /* Update offset_done on every 100 blocks. */ 1817 sync->ds_offset_done = moffset; 1818 g_raid3_update_metadata(disk); 1819 } 1820 return; 1821 } 1822 default: 1823 KASSERT(1 == 0, ("Invalid command here: %u (device=%s)", 1824 bp->bio_cmd, sc->sc_name)); 1825 break; 1826 } 1827 } 1828 1829 static int 1830 g_raid3_register_request(struct bio *pbp) 1831 { 1832 struct g_raid3_softc *sc; 1833 struct g_raid3_disk *disk; 1834 struct g_consumer *cp; 1835 struct bio *cbp, *tmpbp; 1836 off_t offset, length; 1837 u_int n, ndisks; 1838 int round_robin, verify; 1839 1840 ndisks = 0; 1841 sc = pbp->bio_to->private; 1842 if ((pbp->bio_cflags & G_RAID3_BIO_CFLAG_REGSYNC) != 0 && 1843 sc->sc_syncdisk == NULL) { 1844 g_io_deliver(pbp, EIO); 1845 return (0); 1846 } 1847 g_raid3_init_bio(pbp); 1848 length = pbp->bio_length / (sc->sc_ndisks - 1); 1849 offset = pbp->bio_offset / (sc->sc_ndisks - 1); 1850 round_robin = verify = 0; 1851 switch (pbp->bio_cmd) { 1852 case BIO_READ: 1853 if ((sc->sc_flags & G_RAID3_DEVICE_FLAG_VERIFY) != 0 && 1854 sc->sc_state == G_RAID3_DEVICE_STATE_COMPLETE) { 1855 pbp->bio_pflags |= G_RAID3_BIO_PFLAG_VERIFY; 1856 verify = 1; 1857 ndisks = sc->sc_ndisks; 1858 } else { 1859 verify = 0; 1860 ndisks = sc->sc_ndisks - 1; 1861 } 1862 if ((sc->sc_flags & G_RAID3_DEVICE_FLAG_ROUND_ROBIN) != 0 && 1863 sc->sc_state == G_RAID3_DEVICE_STATE_COMPLETE) { 1864 round_robin = 1; 1865 } else { 1866 round_robin = 0; 1867 } 1868 KASSERT(!round_robin || !verify, 1869 ("ROUND-ROBIN and VERIFY are mutually exclusive.")); 1870 pbp->bio_driver2 = &sc->sc_disks[sc->sc_ndisks - 1]; 1871 break; 1872 case BIO_WRITE: 1873 case BIO_DELETE: 1874 /* 1875 * Delay the request if it is colliding with a synchronization 1876 * request. 1877 */ 1878 if (g_raid3_sync_collision(sc, pbp)) { 1879 g_raid3_regular_delay(sc, pbp); 1880 return (0); 1881 } 1882 1883 if (sc->sc_idle) 1884 g_raid3_unidle(sc); 1885 else 1886 sc->sc_last_write = time_uptime; 1887 1888 ndisks = sc->sc_ndisks; 1889 break; 1890 } 1891 for (n = 0; n < ndisks; n++) { 1892 disk = &sc->sc_disks[n]; 1893 cbp = g_raid3_clone_bio(sc, pbp); 1894 if (cbp == NULL) { 1895 while ((cbp = G_RAID3_HEAD_BIO(pbp)) != NULL) 1896 g_raid3_destroy_bio(sc, cbp); 1897 /* 1898 * To prevent deadlock, we must run back up 1899 * with the ENOMEM for failed requests of any 1900 * of our consumers. Our own sync requests 1901 * can stick around, as they are finite. 1902 */ 1903 if ((pbp->bio_cflags & 1904 G_RAID3_BIO_CFLAG_REGULAR) != 0) { 1905 g_io_deliver(pbp, ENOMEM); 1906 return (0); 1907 } 1908 return (ENOMEM); 1909 } 1910 cbp->bio_offset = offset; 1911 cbp->bio_length = length; 1912 cbp->bio_done = g_raid3_done; 1913 switch (pbp->bio_cmd) { 1914 case BIO_READ: 1915 if (disk->d_state != G_RAID3_DISK_STATE_ACTIVE) { 1916 /* 1917 * Replace invalid component with the parity 1918 * component. 1919 */ 1920 disk = &sc->sc_disks[sc->sc_ndisks - 1]; 1921 cbp->bio_cflags |= G_RAID3_BIO_CFLAG_PARITY; 1922 pbp->bio_pflags |= G_RAID3_BIO_PFLAG_DEGRADED; 1923 } else if (round_robin && 1924 disk->d_no == sc->sc_round_robin) { 1925 /* 1926 * In round-robin mode skip one data component 1927 * and use parity component when reading. 1928 */ 1929 pbp->bio_driver2 = disk; 1930 disk = &sc->sc_disks[sc->sc_ndisks - 1]; 1931 cbp->bio_cflags |= G_RAID3_BIO_CFLAG_PARITY; 1932 sc->sc_round_robin++; 1933 round_robin = 0; 1934 } else if (verify && disk->d_no == sc->sc_ndisks - 1) { 1935 cbp->bio_cflags |= G_RAID3_BIO_CFLAG_PARITY; 1936 } 1937 break; 1938 case BIO_WRITE: 1939 case BIO_DELETE: 1940 if (disk->d_state == G_RAID3_DISK_STATE_ACTIVE || 1941 disk->d_state == G_RAID3_DISK_STATE_SYNCHRONIZING) { 1942 if (n == ndisks - 1) { 1943 /* 1944 * Active parity component, mark it as such. 1945 */ 1946 cbp->bio_cflags |= 1947 G_RAID3_BIO_CFLAG_PARITY; 1948 } 1949 } else { 1950 pbp->bio_pflags |= G_RAID3_BIO_PFLAG_DEGRADED; 1951 if (n == ndisks - 1) { 1952 /* 1953 * Parity component is not connected, 1954 * so destroy its request. 1955 */ 1956 pbp->bio_pflags |= 1957 G_RAID3_BIO_PFLAG_NOPARITY; 1958 g_raid3_destroy_bio(sc, cbp); 1959 cbp = NULL; 1960 } else { 1961 cbp->bio_cflags |= 1962 G_RAID3_BIO_CFLAG_NODISK; 1963 disk = NULL; 1964 } 1965 } 1966 break; 1967 } 1968 if (cbp != NULL) 1969 cbp->bio_caller2 = disk; 1970 } 1971 switch (pbp->bio_cmd) { 1972 case BIO_READ: 1973 if (round_robin) { 1974 /* 1975 * If we are in round-robin mode and 'round_robin' is 1976 * still 1, it means, that we skipped parity component 1977 * for this read and must reset sc_round_robin field. 1978 */ 1979 sc->sc_round_robin = 0; 1980 } 1981 G_RAID3_FOREACH_SAFE_BIO(pbp, cbp, tmpbp) { 1982 disk = cbp->bio_caller2; 1983 cp = disk->d_consumer; 1984 cbp->bio_to = cp->provider; 1985 G_RAID3_LOGREQ(3, cbp, "Sending request."); 1986 KASSERT(cp->acr >= 1 && cp->acw >= 1 && cp->ace >= 1, 1987 ("Consumer %s not opened (r%dw%de%d).", 1988 cp->provider->name, cp->acr, cp->acw, cp->ace)); 1989 cp->index++; 1990 g_io_request(cbp, cp); 1991 } 1992 break; 1993 case BIO_WRITE: 1994 case BIO_DELETE: 1995 /* 1996 * Put request onto inflight queue, so we can check if new 1997 * synchronization requests don't collide with it. 1998 */ 1999 bioq_insert_tail(&sc->sc_inflight, pbp); 2000 2001 /* 2002 * Bump syncid on first write. 2003 */ 2004 if ((sc->sc_bump_id & G_RAID3_BUMP_SYNCID) != 0) { 2005 sc->sc_bump_id &= ~G_RAID3_BUMP_SYNCID; 2006 g_raid3_bump_syncid(sc); 2007 } 2008 g_raid3_scatter(pbp); 2009 break; 2010 } 2011 return (0); 2012 } 2013 2014 static int 2015 g_raid3_can_destroy(struct g_raid3_softc *sc) 2016 { 2017 struct g_geom *gp; 2018 struct g_consumer *cp; 2019 2020 g_topology_assert(); 2021 gp = sc->sc_geom; 2022 if (gp->softc == NULL) 2023 return (1); 2024 LIST_FOREACH(cp, &gp->consumer, consumer) { 2025 if (g_raid3_is_busy(sc, cp)) 2026 return (0); 2027 } 2028 gp = sc->sc_sync.ds_geom; 2029 LIST_FOREACH(cp, &gp->consumer, consumer) { 2030 if (g_raid3_is_busy(sc, cp)) 2031 return (0); 2032 } 2033 G_RAID3_DEBUG(2, "No I/O requests for %s, it can be destroyed.", 2034 sc->sc_name); 2035 return (1); 2036 } 2037 2038 static int 2039 g_raid3_try_destroy(struct g_raid3_softc *sc) 2040 { 2041 2042 g_topology_assert_not(); 2043 sx_assert(&sc->sc_lock, SX_XLOCKED); 2044 2045 if (sc->sc_rootmount != NULL) { 2046 G_RAID3_DEBUG(1, "root_mount_rel[%u] %p", __LINE__, 2047 sc->sc_rootmount); 2048 root_mount_rel(sc->sc_rootmount); 2049 sc->sc_rootmount = NULL; 2050 } 2051 2052 g_topology_lock(); 2053 if (!g_raid3_can_destroy(sc)) { 2054 g_topology_unlock(); 2055 return (0); 2056 } 2057 sc->sc_geom->softc = NULL; 2058 sc->sc_sync.ds_geom->softc = NULL; 2059 if ((sc->sc_flags & G_RAID3_DEVICE_FLAG_WAIT) != 0) { 2060 g_topology_unlock(); 2061 G_RAID3_DEBUG(4, "%s: Waking up %p.", __func__, 2062 &sc->sc_worker); 2063 /* Unlock sc_lock here, as it can be destroyed after wakeup. */ 2064 sx_xunlock(&sc->sc_lock); 2065 wakeup(&sc->sc_worker); 2066 sc->sc_worker = NULL; 2067 } else { 2068 g_topology_unlock(); 2069 g_raid3_destroy_device(sc); 2070 } 2071 return (1); 2072 } 2073 2074 /* 2075 * Worker thread. 2076 */ 2077 static void 2078 g_raid3_worker(void *arg) 2079 { 2080 struct g_raid3_softc *sc; 2081 struct g_raid3_event *ep; 2082 struct bio *bp; 2083 int timeout; 2084 2085 sc = arg; 2086 thread_lock(curthread); 2087 sched_prio(curthread, PRIBIO); 2088 thread_unlock(curthread); 2089 2090 sx_xlock(&sc->sc_lock); 2091 for (;;) { 2092 G_RAID3_DEBUG(5, "%s: Let's see...", __func__); 2093 /* 2094 * First take a look at events. 2095 * This is important to handle events before any I/O requests. 2096 */ 2097 ep = g_raid3_event_get(sc); 2098 if (ep != NULL) { 2099 g_raid3_event_remove(sc, ep); 2100 if ((ep->e_flags & G_RAID3_EVENT_DEVICE) != 0) { 2101 /* Update only device status. */ 2102 G_RAID3_DEBUG(3, 2103 "Running event for device %s.", 2104 sc->sc_name); 2105 ep->e_error = 0; 2106 g_raid3_update_device(sc, 1); 2107 } else { 2108 /* Update disk status. */ 2109 G_RAID3_DEBUG(3, "Running event for disk %s.", 2110 g_raid3_get_diskname(ep->e_disk)); 2111 ep->e_error = g_raid3_update_disk(ep->e_disk, 2112 ep->e_state); 2113 if (ep->e_error == 0) 2114 g_raid3_update_device(sc, 0); 2115 } 2116 if ((ep->e_flags & G_RAID3_EVENT_DONTWAIT) != 0) { 2117 KASSERT(ep->e_error == 0, 2118 ("Error cannot be handled.")); 2119 g_raid3_event_free(ep); 2120 } else { 2121 ep->e_flags |= G_RAID3_EVENT_DONE; 2122 G_RAID3_DEBUG(4, "%s: Waking up %p.", __func__, 2123 ep); 2124 mtx_lock(&sc->sc_events_mtx); 2125 wakeup(ep); 2126 mtx_unlock(&sc->sc_events_mtx); 2127 } 2128 if ((sc->sc_flags & 2129 G_RAID3_DEVICE_FLAG_DESTROY) != 0) { 2130 if (g_raid3_try_destroy(sc)) { 2131 curthread->td_pflags &= ~TDP_GEOM; 2132 G_RAID3_DEBUG(1, "Thread exiting."); 2133 kproc_exit(0); 2134 } 2135 } 2136 G_RAID3_DEBUG(5, "%s: I'm here 1.", __func__); 2137 continue; 2138 } 2139 /* 2140 * Check if we can mark array as CLEAN and if we can't take 2141 * how much seconds should we wait. 2142 */ 2143 timeout = g_raid3_idle(sc, -1); 2144 /* 2145 * Now I/O requests. 2146 */ 2147 /* Get first request from the queue. */ 2148 mtx_lock(&sc->sc_queue_mtx); 2149 bp = bioq_first(&sc->sc_queue); 2150 if (bp == NULL) { 2151 if ((sc->sc_flags & 2152 G_RAID3_DEVICE_FLAG_DESTROY) != 0) { 2153 mtx_unlock(&sc->sc_queue_mtx); 2154 if (g_raid3_try_destroy(sc)) { 2155 curthread->td_pflags &= ~TDP_GEOM; 2156 G_RAID3_DEBUG(1, "Thread exiting."); 2157 kproc_exit(0); 2158 } 2159 mtx_lock(&sc->sc_queue_mtx); 2160 } 2161 sx_xunlock(&sc->sc_lock); 2162 /* 2163 * XXX: We can miss an event here, because an event 2164 * can be added without sx-device-lock and without 2165 * mtx-queue-lock. Maybe I should just stop using 2166 * dedicated mutex for events synchronization and 2167 * stick with the queue lock? 2168 * The event will hang here until next I/O request 2169 * or next event is received. 2170 */ 2171 MSLEEP(sc, &sc->sc_queue_mtx, PRIBIO | PDROP, "r3:w1", 2172 timeout * hz); 2173 sx_xlock(&sc->sc_lock); 2174 G_RAID3_DEBUG(5, "%s: I'm here 4.", __func__); 2175 continue; 2176 } 2177 process: 2178 bioq_remove(&sc->sc_queue, bp); 2179 mtx_unlock(&sc->sc_queue_mtx); 2180 2181 if (bp->bio_from->geom == sc->sc_sync.ds_geom && 2182 (bp->bio_cflags & G_RAID3_BIO_CFLAG_SYNC) != 0) { 2183 g_raid3_sync_request(bp); /* READ */ 2184 } else if (bp->bio_to != sc->sc_provider) { 2185 if ((bp->bio_cflags & G_RAID3_BIO_CFLAG_REGULAR) != 0) 2186 g_raid3_regular_request(bp); 2187 else if ((bp->bio_cflags & G_RAID3_BIO_CFLAG_SYNC) != 0) 2188 g_raid3_sync_request(bp); /* WRITE */ 2189 else { 2190 KASSERT(0, 2191 ("Invalid request cflags=0x%hx to=%s.", 2192 bp->bio_cflags, bp->bio_to->name)); 2193 } 2194 } else if (g_raid3_register_request(bp) != 0) { 2195 mtx_lock(&sc->sc_queue_mtx); 2196 bioq_insert_head(&sc->sc_queue, bp); 2197 /* 2198 * We are short in memory, let see if there are finished 2199 * request we can free. 2200 */ 2201 TAILQ_FOREACH(bp, &sc->sc_queue.queue, bio_queue) { 2202 if (bp->bio_cflags & G_RAID3_BIO_CFLAG_REGULAR) 2203 goto process; 2204 } 2205 /* 2206 * No finished regular request, so at least keep 2207 * synchronization running. 2208 */ 2209 TAILQ_FOREACH(bp, &sc->sc_queue.queue, bio_queue) { 2210 if (bp->bio_cflags & G_RAID3_BIO_CFLAG_SYNC) 2211 goto process; 2212 } 2213 sx_xunlock(&sc->sc_lock); 2214 MSLEEP(&sc->sc_queue, &sc->sc_queue_mtx, PRIBIO | PDROP, 2215 "r3:lowmem", hz / 10); 2216 sx_xlock(&sc->sc_lock); 2217 } 2218 G_RAID3_DEBUG(5, "%s: I'm here 9.", __func__); 2219 } 2220 } 2221 2222 static void 2223 g_raid3_update_idle(struct g_raid3_softc *sc, struct g_raid3_disk *disk) 2224 { 2225 2226 sx_assert(&sc->sc_lock, SX_LOCKED); 2227 if ((sc->sc_flags & G_RAID3_DEVICE_FLAG_NOFAILSYNC) != 0) 2228 return; 2229 if (!sc->sc_idle && (disk->d_flags & G_RAID3_DISK_FLAG_DIRTY) == 0) { 2230 G_RAID3_DEBUG(1, "Disk %s (device %s) marked as dirty.", 2231 g_raid3_get_diskname(disk), sc->sc_name); 2232 disk->d_flags |= G_RAID3_DISK_FLAG_DIRTY; 2233 } else if (sc->sc_idle && 2234 (disk->d_flags & G_RAID3_DISK_FLAG_DIRTY) != 0) { 2235 G_RAID3_DEBUG(1, "Disk %s (device %s) marked as clean.", 2236 g_raid3_get_diskname(disk), sc->sc_name); 2237 disk->d_flags &= ~G_RAID3_DISK_FLAG_DIRTY; 2238 } 2239 } 2240 2241 static void 2242 g_raid3_sync_start(struct g_raid3_softc *sc) 2243 { 2244 struct g_raid3_disk *disk; 2245 struct g_consumer *cp; 2246 struct bio *bp; 2247 int error __diagused; 2248 u_int n; 2249 2250 g_topology_assert_not(); 2251 sx_assert(&sc->sc_lock, SX_XLOCKED); 2252 2253 KASSERT(sc->sc_state == G_RAID3_DEVICE_STATE_DEGRADED, 2254 ("Device not in DEGRADED state (%s, %u).", sc->sc_name, 2255 sc->sc_state)); 2256 KASSERT(sc->sc_syncdisk == NULL, ("Syncdisk is not NULL (%s, %u).", 2257 sc->sc_name, sc->sc_state)); 2258 disk = NULL; 2259 for (n = 0; n < sc->sc_ndisks; n++) { 2260 if (sc->sc_disks[n].d_state != G_RAID3_DISK_STATE_SYNCHRONIZING) 2261 continue; 2262 disk = &sc->sc_disks[n]; 2263 break; 2264 } 2265 if (disk == NULL) 2266 return; 2267 2268 sx_xunlock(&sc->sc_lock); 2269 g_topology_lock(); 2270 cp = g_new_consumer(sc->sc_sync.ds_geom); 2271 error = g_attach(cp, sc->sc_provider); 2272 KASSERT(error == 0, 2273 ("Cannot attach to %s (error=%d).", sc->sc_name, error)); 2274 error = g_access(cp, 1, 0, 0); 2275 KASSERT(error == 0, ("Cannot open %s (error=%d).", sc->sc_name, error)); 2276 g_topology_unlock(); 2277 sx_xlock(&sc->sc_lock); 2278 2279 G_RAID3_DEBUG(0, "Device %s: rebuilding provider %s.", sc->sc_name, 2280 g_raid3_get_diskname(disk)); 2281 if ((sc->sc_flags & G_RAID3_DEVICE_FLAG_NOFAILSYNC) == 0) 2282 disk->d_flags |= G_RAID3_DISK_FLAG_DIRTY; 2283 KASSERT(disk->d_sync.ds_consumer == NULL, 2284 ("Sync consumer already exists (device=%s, disk=%s).", 2285 sc->sc_name, g_raid3_get_diskname(disk))); 2286 2287 disk->d_sync.ds_consumer = cp; 2288 disk->d_sync.ds_consumer->private = disk; 2289 disk->d_sync.ds_consumer->index = 0; 2290 sc->sc_syncdisk = disk; 2291 2292 /* 2293 * Allocate memory for synchronization bios and initialize them. 2294 */ 2295 disk->d_sync.ds_bios = malloc(sizeof(struct bio *) * g_raid3_syncreqs, 2296 M_RAID3, M_WAITOK); 2297 for (n = 0; n < g_raid3_syncreqs; n++) { 2298 bp = g_alloc_bio(); 2299 disk->d_sync.ds_bios[n] = bp; 2300 bp->bio_parent = NULL; 2301 bp->bio_cmd = BIO_READ; 2302 bp->bio_data = malloc(maxphys, M_RAID3, M_WAITOK); 2303 bp->bio_cflags = 0; 2304 bp->bio_offset = disk->d_sync.ds_offset * (sc->sc_ndisks - 1); 2305 bp->bio_length = MIN(maxphys, sc->sc_mediasize - bp->bio_offset); 2306 disk->d_sync.ds_offset += bp->bio_length / (sc->sc_ndisks - 1); 2307 bp->bio_done = g_raid3_sync_done; 2308 bp->bio_from = disk->d_sync.ds_consumer; 2309 bp->bio_to = sc->sc_provider; 2310 bp->bio_caller1 = (void *)(uintptr_t)n; 2311 } 2312 2313 /* Set the number of in-flight synchronization requests. */ 2314 disk->d_sync.ds_inflight = g_raid3_syncreqs; 2315 2316 /* 2317 * Fire off first synchronization requests. 2318 */ 2319 for (n = 0; n < g_raid3_syncreqs; n++) { 2320 bp = disk->d_sync.ds_bios[n]; 2321 G_RAID3_LOGREQ(3, bp, "Sending synchronization request."); 2322 disk->d_sync.ds_consumer->index++; 2323 /* 2324 * Delay the request if it is colliding with a regular request. 2325 */ 2326 if (g_raid3_regular_collision(sc, bp)) 2327 g_raid3_sync_delay(sc, bp); 2328 else 2329 g_io_request(bp, disk->d_sync.ds_consumer); 2330 } 2331 } 2332 2333 /* 2334 * Stop synchronization process. 2335 * type: 0 - synchronization finished 2336 * 1 - synchronization stopped 2337 */ 2338 static void 2339 g_raid3_sync_stop(struct g_raid3_softc *sc, int type) 2340 { 2341 struct g_raid3_disk *disk; 2342 struct g_consumer *cp; 2343 2344 g_topology_assert_not(); 2345 sx_assert(&sc->sc_lock, SX_LOCKED); 2346 2347 KASSERT(sc->sc_state == G_RAID3_DEVICE_STATE_DEGRADED, 2348 ("Device not in DEGRADED state (%s, %u).", sc->sc_name, 2349 sc->sc_state)); 2350 disk = sc->sc_syncdisk; 2351 sc->sc_syncdisk = NULL; 2352 KASSERT(disk != NULL, ("No disk was synchronized (%s).", sc->sc_name)); 2353 KASSERT(disk->d_state == G_RAID3_DISK_STATE_SYNCHRONIZING, 2354 ("Wrong disk state (%s, %s).", g_raid3_get_diskname(disk), 2355 g_raid3_disk_state2str(disk->d_state))); 2356 if (disk->d_sync.ds_consumer == NULL) 2357 return; 2358 2359 if (type == 0) { 2360 G_RAID3_DEBUG(0, "Device %s: rebuilding provider %s finished.", 2361 sc->sc_name, g_raid3_get_diskname(disk)); 2362 } else /* if (type == 1) */ { 2363 G_RAID3_DEBUG(0, "Device %s: rebuilding provider %s stopped.", 2364 sc->sc_name, g_raid3_get_diskname(disk)); 2365 } 2366 free(disk->d_sync.ds_bios, M_RAID3); 2367 disk->d_sync.ds_bios = NULL; 2368 cp = disk->d_sync.ds_consumer; 2369 disk->d_sync.ds_consumer = NULL; 2370 disk->d_flags &= ~G_RAID3_DISK_FLAG_DIRTY; 2371 sx_xunlock(&sc->sc_lock); /* Avoid recursion on sc_lock. */ 2372 g_topology_lock(); 2373 g_raid3_kill_consumer(sc, cp); 2374 g_topology_unlock(); 2375 sx_xlock(&sc->sc_lock); 2376 } 2377 2378 static void 2379 g_raid3_launch_provider(struct g_raid3_softc *sc) 2380 { 2381 struct g_provider *pp; 2382 struct g_raid3_disk *disk; 2383 int n; 2384 2385 sx_assert(&sc->sc_lock, SX_LOCKED); 2386 2387 g_topology_lock(); 2388 pp = g_new_providerf(sc->sc_geom, "raid3/%s", sc->sc_name); 2389 pp->mediasize = sc->sc_mediasize; 2390 pp->sectorsize = sc->sc_sectorsize; 2391 pp->stripesize = 0; 2392 pp->stripeoffset = 0; 2393 for (n = 0; n < sc->sc_ndisks; n++) { 2394 disk = &sc->sc_disks[n]; 2395 if (disk->d_consumer && disk->d_consumer->provider && 2396 disk->d_consumer->provider->stripesize > pp->stripesize) { 2397 pp->stripesize = disk->d_consumer->provider->stripesize; 2398 pp->stripeoffset = disk->d_consumer->provider->stripeoffset; 2399 } 2400 } 2401 pp->stripesize *= sc->sc_ndisks - 1; 2402 pp->stripeoffset *= sc->sc_ndisks - 1; 2403 pp->private = sc; 2404 sc->sc_refcnt++; 2405 sc->sc_provider = pp; 2406 g_error_provider(pp, 0); 2407 g_topology_unlock(); 2408 G_RAID3_DEBUG(0, "Device %s launched (%u/%u).", pp->name, 2409 g_raid3_ndisks(sc, G_RAID3_DISK_STATE_ACTIVE), sc->sc_ndisks); 2410 2411 if (sc->sc_state == G_RAID3_DEVICE_STATE_DEGRADED) 2412 g_raid3_sync_start(sc); 2413 } 2414 2415 static void 2416 g_raid3_destroy_provider(struct g_raid3_softc *sc) 2417 { 2418 struct bio *bp; 2419 2420 g_topology_assert_not(); 2421 KASSERT(sc->sc_provider != NULL, ("NULL provider (device=%s).", 2422 sc->sc_name)); 2423 2424 g_topology_lock(); 2425 g_error_provider(sc->sc_provider, ENXIO); 2426 mtx_lock(&sc->sc_queue_mtx); 2427 while ((bp = bioq_first(&sc->sc_queue)) != NULL) { 2428 bioq_remove(&sc->sc_queue, bp); 2429 g_io_deliver(bp, ENXIO); 2430 } 2431 mtx_unlock(&sc->sc_queue_mtx); 2432 G_RAID3_DEBUG(0, "Device %s: provider %s destroyed.", sc->sc_name, 2433 sc->sc_provider->name); 2434 g_wither_provider(sc->sc_provider, ENXIO); 2435 g_topology_unlock(); 2436 sc->sc_provider = NULL; 2437 if (sc->sc_syncdisk != NULL) 2438 g_raid3_sync_stop(sc, 1); 2439 } 2440 2441 static void 2442 g_raid3_go(void *arg) 2443 { 2444 struct g_raid3_softc *sc; 2445 struct g_raid3_event *ep; 2446 2447 sc = arg; 2448 G_RAID3_DEBUG(0, "Force device %s start due to timeout.", sc->sc_name); 2449 ep = sc->sc_timeout_event; 2450 sc->sc_timeout_event = NULL; 2451 g_raid3_event_dispatch(ep, sc, 0, 2452 G_RAID3_EVENT_DONTWAIT | G_RAID3_EVENT_DEVICE); 2453 } 2454 2455 static void 2456 g_raid3_timeout_drain(struct g_raid3_softc *sc) 2457 { 2458 sx_assert(&sc->sc_lock, SX_XLOCKED); 2459 2460 callout_drain(&sc->sc_callout); 2461 g_raid3_event_free(sc->sc_timeout_event); 2462 sc->sc_timeout_event = NULL; 2463 } 2464 2465 static u_int 2466 g_raid3_determine_state(struct g_raid3_disk *disk) 2467 { 2468 struct g_raid3_softc *sc; 2469 u_int state; 2470 2471 sc = disk->d_softc; 2472 if (sc->sc_syncid == disk->d_sync.ds_syncid) { 2473 if ((disk->d_flags & 2474 G_RAID3_DISK_FLAG_SYNCHRONIZING) == 0) { 2475 /* Disk does not need synchronization. */ 2476 state = G_RAID3_DISK_STATE_ACTIVE; 2477 } else { 2478 if ((sc->sc_flags & 2479 G_RAID3_DEVICE_FLAG_NOAUTOSYNC) == 0 || 2480 (disk->d_flags & 2481 G_RAID3_DISK_FLAG_FORCE_SYNC) != 0) { 2482 /* 2483 * We can start synchronization from 2484 * the stored offset. 2485 */ 2486 state = G_RAID3_DISK_STATE_SYNCHRONIZING; 2487 } else { 2488 state = G_RAID3_DISK_STATE_STALE; 2489 } 2490 } 2491 } else if (disk->d_sync.ds_syncid < sc->sc_syncid) { 2492 /* 2493 * Reset all synchronization data for this disk, 2494 * because if it even was synchronized, it was 2495 * synchronized to disks with different syncid. 2496 */ 2497 disk->d_flags |= G_RAID3_DISK_FLAG_SYNCHRONIZING; 2498 disk->d_sync.ds_offset = 0; 2499 disk->d_sync.ds_offset_done = 0; 2500 disk->d_sync.ds_syncid = sc->sc_syncid; 2501 if ((sc->sc_flags & G_RAID3_DEVICE_FLAG_NOAUTOSYNC) == 0 || 2502 (disk->d_flags & G_RAID3_DISK_FLAG_FORCE_SYNC) != 0) { 2503 state = G_RAID3_DISK_STATE_SYNCHRONIZING; 2504 } else { 2505 state = G_RAID3_DISK_STATE_STALE; 2506 } 2507 } else /* if (sc->sc_syncid < disk->d_sync.ds_syncid) */ { 2508 /* 2509 * Not good, NOT GOOD! 2510 * It means that device was started on stale disks 2511 * and more fresh disk just arrive. 2512 * If there were writes, device is broken, sorry. 2513 * I think the best choice here is don't touch 2514 * this disk and inform the user loudly. 2515 */ 2516 G_RAID3_DEBUG(0, "Device %s was started before the freshest " 2517 "disk (%s) arrives!! It will not be connected to the " 2518 "running device.", sc->sc_name, 2519 g_raid3_get_diskname(disk)); 2520 g_raid3_destroy_disk(disk); 2521 state = G_RAID3_DISK_STATE_NONE; 2522 /* Return immediately, because disk was destroyed. */ 2523 return (state); 2524 } 2525 G_RAID3_DEBUG(3, "State for %s disk: %s.", 2526 g_raid3_get_diskname(disk), g_raid3_disk_state2str(state)); 2527 return (state); 2528 } 2529 2530 /* 2531 * Update device state. 2532 */ 2533 static void 2534 g_raid3_update_device(struct g_raid3_softc *sc, boolean_t force) 2535 { 2536 struct g_raid3_disk *disk; 2537 u_int state; 2538 2539 sx_assert(&sc->sc_lock, SX_XLOCKED); 2540 2541 switch (sc->sc_state) { 2542 case G_RAID3_DEVICE_STATE_STARTING: 2543 { 2544 u_int n, ndirty, ndisks, genid, syncid; 2545 2546 KASSERT(sc->sc_provider == NULL, 2547 ("Non-NULL provider in STARTING state (%s).", sc->sc_name)); 2548 /* 2549 * Are we ready? We are, if all disks are connected or 2550 * one disk is missing and 'force' is true. 2551 */ 2552 if (g_raid3_ndisks(sc, -1) + force == sc->sc_ndisks) { 2553 if (!force) 2554 g_raid3_timeout_drain(sc); 2555 } else { 2556 if (force) { 2557 /* 2558 * Timeout expired, so destroy device. 2559 */ 2560 sc->sc_flags |= G_RAID3_DEVICE_FLAG_DESTROY; 2561 G_RAID3_DEBUG(1, "root_mount_rel[%u] %p", 2562 __LINE__, sc->sc_rootmount); 2563 root_mount_rel(sc->sc_rootmount); 2564 sc->sc_rootmount = NULL; 2565 } 2566 return; 2567 } 2568 2569 /* 2570 * Find the biggest genid. 2571 */ 2572 genid = 0; 2573 for (n = 0; n < sc->sc_ndisks; n++) { 2574 disk = &sc->sc_disks[n]; 2575 if (disk->d_state == G_RAID3_DISK_STATE_NODISK) 2576 continue; 2577 if (disk->d_genid > genid) 2578 genid = disk->d_genid; 2579 } 2580 sc->sc_genid = genid; 2581 /* 2582 * Remove all disks without the biggest genid. 2583 */ 2584 for (n = 0; n < sc->sc_ndisks; n++) { 2585 disk = &sc->sc_disks[n]; 2586 if (disk->d_state == G_RAID3_DISK_STATE_NODISK) 2587 continue; 2588 if (disk->d_genid < genid) { 2589 G_RAID3_DEBUG(0, 2590 "Component %s (device %s) broken, skipping.", 2591 g_raid3_get_diskname(disk), sc->sc_name); 2592 g_raid3_destroy_disk(disk); 2593 } 2594 } 2595 2596 /* 2597 * There must be at least 'sc->sc_ndisks - 1' components 2598 * with the same syncid and without SYNCHRONIZING flag. 2599 */ 2600 2601 /* 2602 * Find the biggest syncid, number of valid components and 2603 * number of dirty components. 2604 */ 2605 ndirty = ndisks = syncid = 0; 2606 for (n = 0; n < sc->sc_ndisks; n++) { 2607 disk = &sc->sc_disks[n]; 2608 if (disk->d_state == G_RAID3_DISK_STATE_NODISK) 2609 continue; 2610 if ((disk->d_flags & G_RAID3_DISK_FLAG_DIRTY) != 0) 2611 ndirty++; 2612 if (disk->d_sync.ds_syncid > syncid) { 2613 syncid = disk->d_sync.ds_syncid; 2614 ndisks = 0; 2615 } else if (disk->d_sync.ds_syncid < syncid) { 2616 continue; 2617 } 2618 if ((disk->d_flags & 2619 G_RAID3_DISK_FLAG_SYNCHRONIZING) != 0) { 2620 continue; 2621 } 2622 ndisks++; 2623 } 2624 /* 2625 * Do we have enough valid components? 2626 */ 2627 if (ndisks + 1 < sc->sc_ndisks) { 2628 G_RAID3_DEBUG(0, 2629 "Device %s is broken, too few valid components.", 2630 sc->sc_name); 2631 sc->sc_flags |= G_RAID3_DEVICE_FLAG_DESTROY; 2632 return; 2633 } 2634 /* 2635 * If there is one DIRTY component and all disks are present, 2636 * mark it for synchronization. If there is more than one DIRTY 2637 * component, mark parity component for synchronization. 2638 */ 2639 if (ndisks == sc->sc_ndisks && ndirty == 1) { 2640 for (n = 0; n < sc->sc_ndisks; n++) { 2641 disk = &sc->sc_disks[n]; 2642 if ((disk->d_flags & 2643 G_RAID3_DISK_FLAG_DIRTY) == 0) { 2644 continue; 2645 } 2646 disk->d_flags |= 2647 G_RAID3_DISK_FLAG_SYNCHRONIZING; 2648 } 2649 } else if (ndisks == sc->sc_ndisks && ndirty > 1) { 2650 disk = &sc->sc_disks[sc->sc_ndisks - 1]; 2651 disk->d_flags |= G_RAID3_DISK_FLAG_SYNCHRONIZING; 2652 } 2653 2654 sc->sc_syncid = syncid; 2655 if (force) { 2656 /* Remember to bump syncid on first write. */ 2657 sc->sc_bump_id |= G_RAID3_BUMP_SYNCID; 2658 } 2659 if (ndisks == sc->sc_ndisks) 2660 state = G_RAID3_DEVICE_STATE_COMPLETE; 2661 else /* if (ndisks == sc->sc_ndisks - 1) */ 2662 state = G_RAID3_DEVICE_STATE_DEGRADED; 2663 G_RAID3_DEBUG(1, "Device %s state changed from %s to %s.", 2664 sc->sc_name, g_raid3_device_state2str(sc->sc_state), 2665 g_raid3_device_state2str(state)); 2666 sc->sc_state = state; 2667 for (n = 0; n < sc->sc_ndisks; n++) { 2668 disk = &sc->sc_disks[n]; 2669 if (disk->d_state == G_RAID3_DISK_STATE_NODISK) 2670 continue; 2671 state = g_raid3_determine_state(disk); 2672 g_raid3_event_send(disk, state, G_RAID3_EVENT_DONTWAIT); 2673 if (state == G_RAID3_DISK_STATE_STALE) 2674 sc->sc_bump_id |= G_RAID3_BUMP_SYNCID; 2675 } 2676 break; 2677 } 2678 case G_RAID3_DEVICE_STATE_DEGRADED: 2679 /* 2680 * Genid need to be bumped immediately, so do it here. 2681 */ 2682 if ((sc->sc_bump_id & G_RAID3_BUMP_GENID) != 0) { 2683 sc->sc_bump_id &= ~G_RAID3_BUMP_GENID; 2684 g_raid3_bump_genid(sc); 2685 } 2686 2687 if (g_raid3_ndisks(sc, G_RAID3_DISK_STATE_NEW) > 0) 2688 return; 2689 if (g_raid3_ndisks(sc, G_RAID3_DISK_STATE_ACTIVE) < 2690 sc->sc_ndisks - 1) { 2691 if (sc->sc_provider != NULL) 2692 g_raid3_destroy_provider(sc); 2693 sc->sc_flags |= G_RAID3_DEVICE_FLAG_DESTROY; 2694 return; 2695 } 2696 if (g_raid3_ndisks(sc, G_RAID3_DISK_STATE_ACTIVE) == 2697 sc->sc_ndisks) { 2698 state = G_RAID3_DEVICE_STATE_COMPLETE; 2699 G_RAID3_DEBUG(1, 2700 "Device %s state changed from %s to %s.", 2701 sc->sc_name, g_raid3_device_state2str(sc->sc_state), 2702 g_raid3_device_state2str(state)); 2703 sc->sc_state = state; 2704 } 2705 if (sc->sc_provider == NULL) 2706 g_raid3_launch_provider(sc); 2707 if (sc->sc_rootmount != NULL) { 2708 G_RAID3_DEBUG(1, "root_mount_rel[%u] %p", __LINE__, 2709 sc->sc_rootmount); 2710 root_mount_rel(sc->sc_rootmount); 2711 sc->sc_rootmount = NULL; 2712 } 2713 break; 2714 case G_RAID3_DEVICE_STATE_COMPLETE: 2715 /* 2716 * Genid need to be bumped immediately, so do it here. 2717 */ 2718 if ((sc->sc_bump_id & G_RAID3_BUMP_GENID) != 0) { 2719 sc->sc_bump_id &= ~G_RAID3_BUMP_GENID; 2720 g_raid3_bump_genid(sc); 2721 } 2722 2723 if (g_raid3_ndisks(sc, G_RAID3_DISK_STATE_NEW) > 0) 2724 return; 2725 KASSERT(g_raid3_ndisks(sc, G_RAID3_DISK_STATE_ACTIVE) >= 2726 sc->sc_ndisks - 1, 2727 ("Too few ACTIVE components in COMPLETE state (device %s).", 2728 sc->sc_name)); 2729 if (g_raid3_ndisks(sc, G_RAID3_DISK_STATE_ACTIVE) == 2730 sc->sc_ndisks - 1) { 2731 state = G_RAID3_DEVICE_STATE_DEGRADED; 2732 G_RAID3_DEBUG(1, 2733 "Device %s state changed from %s to %s.", 2734 sc->sc_name, g_raid3_device_state2str(sc->sc_state), 2735 g_raid3_device_state2str(state)); 2736 sc->sc_state = state; 2737 } 2738 if (sc->sc_provider == NULL) 2739 g_raid3_launch_provider(sc); 2740 if (sc->sc_rootmount != NULL) { 2741 G_RAID3_DEBUG(1, "root_mount_rel[%u] %p", __LINE__, 2742 sc->sc_rootmount); 2743 root_mount_rel(sc->sc_rootmount); 2744 sc->sc_rootmount = NULL; 2745 } 2746 break; 2747 default: 2748 KASSERT(1 == 0, ("Wrong device state (%s, %s).", sc->sc_name, 2749 g_raid3_device_state2str(sc->sc_state))); 2750 break; 2751 } 2752 } 2753 2754 /* 2755 * Update disk state and device state if needed. 2756 */ 2757 #define DISK_STATE_CHANGED() G_RAID3_DEBUG(1, \ 2758 "Disk %s state changed from %s to %s (device %s).", \ 2759 g_raid3_get_diskname(disk), \ 2760 g_raid3_disk_state2str(disk->d_state), \ 2761 g_raid3_disk_state2str(state), sc->sc_name) 2762 static int 2763 g_raid3_update_disk(struct g_raid3_disk *disk, u_int state) 2764 { 2765 struct g_raid3_softc *sc; 2766 2767 sc = disk->d_softc; 2768 sx_assert(&sc->sc_lock, SX_XLOCKED); 2769 2770 again: 2771 G_RAID3_DEBUG(3, "Changing disk %s state from %s to %s.", 2772 g_raid3_get_diskname(disk), g_raid3_disk_state2str(disk->d_state), 2773 g_raid3_disk_state2str(state)); 2774 switch (state) { 2775 case G_RAID3_DISK_STATE_NEW: 2776 /* 2777 * Possible scenarios: 2778 * 1. New disk arrive. 2779 */ 2780 /* Previous state should be NONE. */ 2781 KASSERT(disk->d_state == G_RAID3_DISK_STATE_NONE, 2782 ("Wrong disk state (%s, %s).", g_raid3_get_diskname(disk), 2783 g_raid3_disk_state2str(disk->d_state))); 2784 DISK_STATE_CHANGED(); 2785 2786 disk->d_state = state; 2787 G_RAID3_DEBUG(1, "Device %s: provider %s detected.", 2788 sc->sc_name, g_raid3_get_diskname(disk)); 2789 if (sc->sc_state == G_RAID3_DEVICE_STATE_STARTING) 2790 break; 2791 KASSERT(sc->sc_state == G_RAID3_DEVICE_STATE_DEGRADED || 2792 sc->sc_state == G_RAID3_DEVICE_STATE_COMPLETE, 2793 ("Wrong device state (%s, %s, %s, %s).", sc->sc_name, 2794 g_raid3_device_state2str(sc->sc_state), 2795 g_raid3_get_diskname(disk), 2796 g_raid3_disk_state2str(disk->d_state))); 2797 state = g_raid3_determine_state(disk); 2798 if (state != G_RAID3_DISK_STATE_NONE) 2799 goto again; 2800 break; 2801 case G_RAID3_DISK_STATE_ACTIVE: 2802 /* 2803 * Possible scenarios: 2804 * 1. New disk does not need synchronization. 2805 * 2. Synchronization process finished successfully. 2806 */ 2807 KASSERT(sc->sc_state == G_RAID3_DEVICE_STATE_DEGRADED || 2808 sc->sc_state == G_RAID3_DEVICE_STATE_COMPLETE, 2809 ("Wrong device state (%s, %s, %s, %s).", sc->sc_name, 2810 g_raid3_device_state2str(sc->sc_state), 2811 g_raid3_get_diskname(disk), 2812 g_raid3_disk_state2str(disk->d_state))); 2813 /* Previous state should be NEW or SYNCHRONIZING. */ 2814 KASSERT(disk->d_state == G_RAID3_DISK_STATE_NEW || 2815 disk->d_state == G_RAID3_DISK_STATE_SYNCHRONIZING, 2816 ("Wrong disk state (%s, %s).", g_raid3_get_diskname(disk), 2817 g_raid3_disk_state2str(disk->d_state))); 2818 DISK_STATE_CHANGED(); 2819 2820 if (disk->d_state == G_RAID3_DISK_STATE_SYNCHRONIZING) { 2821 disk->d_flags &= ~G_RAID3_DISK_FLAG_SYNCHRONIZING; 2822 disk->d_flags &= ~G_RAID3_DISK_FLAG_FORCE_SYNC; 2823 g_raid3_sync_stop(sc, 0); 2824 } 2825 disk->d_state = state; 2826 disk->d_sync.ds_offset = 0; 2827 disk->d_sync.ds_offset_done = 0; 2828 g_raid3_update_idle(sc, disk); 2829 g_raid3_update_metadata(disk); 2830 G_RAID3_DEBUG(1, "Device %s: provider %s activated.", 2831 sc->sc_name, g_raid3_get_diskname(disk)); 2832 break; 2833 case G_RAID3_DISK_STATE_STALE: 2834 /* 2835 * Possible scenarios: 2836 * 1. Stale disk was connected. 2837 */ 2838 /* Previous state should be NEW. */ 2839 KASSERT(disk->d_state == G_RAID3_DISK_STATE_NEW, 2840 ("Wrong disk state (%s, %s).", g_raid3_get_diskname(disk), 2841 g_raid3_disk_state2str(disk->d_state))); 2842 KASSERT(sc->sc_state == G_RAID3_DEVICE_STATE_DEGRADED || 2843 sc->sc_state == G_RAID3_DEVICE_STATE_COMPLETE, 2844 ("Wrong device state (%s, %s, %s, %s).", sc->sc_name, 2845 g_raid3_device_state2str(sc->sc_state), 2846 g_raid3_get_diskname(disk), 2847 g_raid3_disk_state2str(disk->d_state))); 2848 /* 2849 * STALE state is only possible if device is marked 2850 * NOAUTOSYNC. 2851 */ 2852 KASSERT((sc->sc_flags & G_RAID3_DEVICE_FLAG_NOAUTOSYNC) != 0, 2853 ("Wrong device state (%s, %s, %s, %s).", sc->sc_name, 2854 g_raid3_device_state2str(sc->sc_state), 2855 g_raid3_get_diskname(disk), 2856 g_raid3_disk_state2str(disk->d_state))); 2857 DISK_STATE_CHANGED(); 2858 2859 disk->d_flags &= ~G_RAID3_DISK_FLAG_DIRTY; 2860 disk->d_state = state; 2861 g_raid3_update_metadata(disk); 2862 G_RAID3_DEBUG(0, "Device %s: provider %s is stale.", 2863 sc->sc_name, g_raid3_get_diskname(disk)); 2864 break; 2865 case G_RAID3_DISK_STATE_SYNCHRONIZING: 2866 /* 2867 * Possible scenarios: 2868 * 1. Disk which needs synchronization was connected. 2869 */ 2870 /* Previous state should be NEW. */ 2871 KASSERT(disk->d_state == G_RAID3_DISK_STATE_NEW, 2872 ("Wrong disk state (%s, %s).", g_raid3_get_diskname(disk), 2873 g_raid3_disk_state2str(disk->d_state))); 2874 KASSERT(sc->sc_state == G_RAID3_DEVICE_STATE_DEGRADED || 2875 sc->sc_state == G_RAID3_DEVICE_STATE_COMPLETE, 2876 ("Wrong device state (%s, %s, %s, %s).", sc->sc_name, 2877 g_raid3_device_state2str(sc->sc_state), 2878 g_raid3_get_diskname(disk), 2879 g_raid3_disk_state2str(disk->d_state))); 2880 DISK_STATE_CHANGED(); 2881 2882 if (disk->d_state == G_RAID3_DISK_STATE_NEW) 2883 disk->d_flags &= ~G_RAID3_DISK_FLAG_DIRTY; 2884 disk->d_state = state; 2885 if (sc->sc_provider != NULL) { 2886 g_raid3_sync_start(sc); 2887 g_raid3_update_metadata(disk); 2888 } 2889 break; 2890 case G_RAID3_DISK_STATE_DISCONNECTED: 2891 /* 2892 * Possible scenarios: 2893 * 1. Device wasn't running yet, but disk disappear. 2894 * 2. Disk was active and disapppear. 2895 * 3. Disk disappear during synchronization process. 2896 */ 2897 if (sc->sc_state == G_RAID3_DEVICE_STATE_DEGRADED || 2898 sc->sc_state == G_RAID3_DEVICE_STATE_COMPLETE) { 2899 /* 2900 * Previous state should be ACTIVE, STALE or 2901 * SYNCHRONIZING. 2902 */ 2903 KASSERT(disk->d_state == G_RAID3_DISK_STATE_ACTIVE || 2904 disk->d_state == G_RAID3_DISK_STATE_STALE || 2905 disk->d_state == G_RAID3_DISK_STATE_SYNCHRONIZING, 2906 ("Wrong disk state (%s, %s).", 2907 g_raid3_get_diskname(disk), 2908 g_raid3_disk_state2str(disk->d_state))); 2909 } else if (sc->sc_state == G_RAID3_DEVICE_STATE_STARTING) { 2910 /* Previous state should be NEW. */ 2911 KASSERT(disk->d_state == G_RAID3_DISK_STATE_NEW, 2912 ("Wrong disk state (%s, %s).", 2913 g_raid3_get_diskname(disk), 2914 g_raid3_disk_state2str(disk->d_state))); 2915 /* 2916 * Reset bumping syncid if disk disappeared in STARTING 2917 * state. 2918 */ 2919 if ((sc->sc_bump_id & G_RAID3_BUMP_SYNCID) != 0) 2920 sc->sc_bump_id &= ~G_RAID3_BUMP_SYNCID; 2921 #ifdef INVARIANTS 2922 } else { 2923 KASSERT(1 == 0, ("Wrong device state (%s, %s, %s, %s).", 2924 sc->sc_name, 2925 g_raid3_device_state2str(sc->sc_state), 2926 g_raid3_get_diskname(disk), 2927 g_raid3_disk_state2str(disk->d_state))); 2928 #endif 2929 } 2930 DISK_STATE_CHANGED(); 2931 G_RAID3_DEBUG(0, "Device %s: provider %s disconnected.", 2932 sc->sc_name, g_raid3_get_diskname(disk)); 2933 2934 g_raid3_destroy_disk(disk); 2935 break; 2936 default: 2937 KASSERT(1 == 0, ("Unknown state (%u).", state)); 2938 break; 2939 } 2940 return (0); 2941 } 2942 #undef DISK_STATE_CHANGED 2943 2944 int 2945 g_raid3_read_metadata(struct g_consumer *cp, struct g_raid3_metadata *md) 2946 { 2947 struct g_provider *pp; 2948 u_char *buf; 2949 int error; 2950 2951 g_topology_assert(); 2952 2953 error = g_access(cp, 1, 0, 0); 2954 if (error != 0) 2955 return (error); 2956 pp = cp->provider; 2957 g_topology_unlock(); 2958 /* Metadata are stored on last sector. */ 2959 buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize, 2960 &error); 2961 g_topology_lock(); 2962 g_access(cp, -1, 0, 0); 2963 if (buf == NULL) { 2964 G_RAID3_DEBUG(1, "Cannot read metadata from %s (error=%d).", 2965 cp->provider->name, error); 2966 return (error); 2967 } 2968 2969 /* Decode metadata. */ 2970 error = raid3_metadata_decode(buf, md); 2971 g_free(buf); 2972 if (strcmp(md->md_magic, G_RAID3_MAGIC) != 0) 2973 return (EINVAL); 2974 if (md->md_version > G_RAID3_VERSION) { 2975 G_RAID3_DEBUG(0, 2976 "Kernel module is too old to handle metadata from %s.", 2977 cp->provider->name); 2978 return (EINVAL); 2979 } 2980 if (error != 0) { 2981 G_RAID3_DEBUG(1, "MD5 metadata hash mismatch for provider %s.", 2982 cp->provider->name); 2983 return (error); 2984 } 2985 if (md->md_sectorsize > maxphys) { 2986 G_RAID3_DEBUG(0, "The blocksize is too big."); 2987 return (EINVAL); 2988 } 2989 2990 return (0); 2991 } 2992 2993 static int 2994 g_raid3_check_metadata(struct g_raid3_softc *sc, struct g_provider *pp, 2995 struct g_raid3_metadata *md) 2996 { 2997 2998 if (md->md_no >= sc->sc_ndisks) { 2999 G_RAID3_DEBUG(1, "Invalid disk %s number (no=%u), skipping.", 3000 pp->name, md->md_no); 3001 return (EINVAL); 3002 } 3003 if (sc->sc_disks[md->md_no].d_state != G_RAID3_DISK_STATE_NODISK) { 3004 G_RAID3_DEBUG(1, "Disk %s (no=%u) already exists, skipping.", 3005 pp->name, md->md_no); 3006 return (EEXIST); 3007 } 3008 if (md->md_all != sc->sc_ndisks) { 3009 G_RAID3_DEBUG(1, 3010 "Invalid '%s' field on disk %s (device %s), skipping.", 3011 "md_all", pp->name, sc->sc_name); 3012 return (EINVAL); 3013 } 3014 if ((md->md_mediasize % md->md_sectorsize) != 0) { 3015 G_RAID3_DEBUG(1, "Invalid metadata (mediasize %% sectorsize != " 3016 "0) on disk %s (device %s), skipping.", pp->name, 3017 sc->sc_name); 3018 return (EINVAL); 3019 } 3020 if (md->md_mediasize != sc->sc_mediasize) { 3021 G_RAID3_DEBUG(1, 3022 "Invalid '%s' field on disk %s (device %s), skipping.", 3023 "md_mediasize", pp->name, sc->sc_name); 3024 return (EINVAL); 3025 } 3026 if ((md->md_mediasize % (sc->sc_ndisks - 1)) != 0) { 3027 G_RAID3_DEBUG(1, 3028 "Invalid '%s' field on disk %s (device %s), skipping.", 3029 "md_mediasize", pp->name, sc->sc_name); 3030 return (EINVAL); 3031 } 3032 if ((sc->sc_mediasize / (sc->sc_ndisks - 1)) > pp->mediasize) { 3033 G_RAID3_DEBUG(1, 3034 "Invalid size of disk %s (device %s), skipping.", pp->name, 3035 sc->sc_name); 3036 return (EINVAL); 3037 } 3038 if ((md->md_sectorsize / pp->sectorsize) < sc->sc_ndisks - 1) { 3039 G_RAID3_DEBUG(1, 3040 "Invalid '%s' field on disk %s (device %s), skipping.", 3041 "md_sectorsize", pp->name, sc->sc_name); 3042 return (EINVAL); 3043 } 3044 if (md->md_sectorsize != sc->sc_sectorsize) { 3045 G_RAID3_DEBUG(1, 3046 "Invalid '%s' field on disk %s (device %s), skipping.", 3047 "md_sectorsize", pp->name, sc->sc_name); 3048 return (EINVAL); 3049 } 3050 if ((sc->sc_sectorsize % pp->sectorsize) != 0) { 3051 G_RAID3_DEBUG(1, 3052 "Invalid sector size of disk %s (device %s), skipping.", 3053 pp->name, sc->sc_name); 3054 return (EINVAL); 3055 } 3056 if ((md->md_mflags & ~G_RAID3_DEVICE_FLAG_MASK) != 0) { 3057 G_RAID3_DEBUG(1, 3058 "Invalid device flags on disk %s (device %s), skipping.", 3059 pp->name, sc->sc_name); 3060 return (EINVAL); 3061 } 3062 if ((md->md_mflags & G_RAID3_DEVICE_FLAG_VERIFY) != 0 && 3063 (md->md_mflags & G_RAID3_DEVICE_FLAG_ROUND_ROBIN) != 0) { 3064 /* 3065 * VERIFY and ROUND-ROBIN options are mutally exclusive. 3066 */ 3067 G_RAID3_DEBUG(1, "Both VERIFY and ROUND-ROBIN flags exist on " 3068 "disk %s (device %s), skipping.", pp->name, sc->sc_name); 3069 return (EINVAL); 3070 } 3071 if ((md->md_dflags & ~G_RAID3_DISK_FLAG_MASK) != 0) { 3072 G_RAID3_DEBUG(1, 3073 "Invalid disk flags on disk %s (device %s), skipping.", 3074 pp->name, sc->sc_name); 3075 return (EINVAL); 3076 } 3077 return (0); 3078 } 3079 3080 int 3081 g_raid3_add_disk(struct g_raid3_softc *sc, struct g_provider *pp, 3082 struct g_raid3_metadata *md) 3083 { 3084 struct g_raid3_disk *disk; 3085 int error; 3086 3087 g_topology_assert_not(); 3088 G_RAID3_DEBUG(2, "Adding disk %s.", pp->name); 3089 3090 error = g_raid3_check_metadata(sc, pp, md); 3091 if (error != 0) 3092 return (error); 3093 if (sc->sc_state != G_RAID3_DEVICE_STATE_STARTING && 3094 md->md_genid < sc->sc_genid) { 3095 G_RAID3_DEBUG(0, "Component %s (device %s) broken, skipping.", 3096 pp->name, sc->sc_name); 3097 return (EINVAL); 3098 } 3099 disk = g_raid3_init_disk(sc, pp, md, &error); 3100 if (disk == NULL) 3101 return (error); 3102 error = g_raid3_event_send(disk, G_RAID3_DISK_STATE_NEW, 3103 G_RAID3_EVENT_WAIT); 3104 if (error != 0) 3105 return (error); 3106 if (md->md_version < G_RAID3_VERSION) { 3107 G_RAID3_DEBUG(0, "Upgrading metadata on %s (v%d->v%d).", 3108 pp->name, md->md_version, G_RAID3_VERSION); 3109 g_raid3_update_metadata(disk); 3110 } 3111 return (0); 3112 } 3113 3114 static void 3115 g_raid3_destroy_delayed(void *arg, int flag) 3116 { 3117 struct g_raid3_softc *sc; 3118 int error; 3119 3120 if (flag == EV_CANCEL) { 3121 G_RAID3_DEBUG(1, "Destroying canceled."); 3122 return; 3123 } 3124 sc = arg; 3125 g_topology_unlock(); 3126 sx_xlock(&sc->sc_lock); 3127 KASSERT((sc->sc_flags & G_RAID3_DEVICE_FLAG_DESTROY) == 0, 3128 ("DESTROY flag set on %s.", sc->sc_name)); 3129 KASSERT((sc->sc_flags & G_RAID3_DEVICE_FLAG_DESTROYING) != 0, 3130 ("DESTROYING flag not set on %s.", sc->sc_name)); 3131 G_RAID3_DEBUG(0, "Destroying %s (delayed).", sc->sc_name); 3132 error = g_raid3_destroy(sc, G_RAID3_DESTROY_SOFT); 3133 if (error != 0) { 3134 G_RAID3_DEBUG(0, "Cannot destroy %s.", sc->sc_name); 3135 sx_xunlock(&sc->sc_lock); 3136 } 3137 g_topology_lock(); 3138 } 3139 3140 static int 3141 g_raid3_access(struct g_provider *pp, int acr, int acw, int ace) 3142 { 3143 struct g_raid3_softc *sc; 3144 int dcr, dcw, dce, error = 0; 3145 3146 g_topology_assert(); 3147 G_RAID3_DEBUG(2, "Access request for %s: r%dw%de%d.", pp->name, acr, 3148 acw, ace); 3149 3150 sc = pp->private; 3151 KASSERT(sc != NULL, ("NULL softc (provider=%s).", pp->name)); 3152 3153 dcr = pp->acr + acr; 3154 dcw = pp->acw + acw; 3155 dce = pp->ace + ace; 3156 3157 g_topology_unlock(); 3158 sx_xlock(&sc->sc_lock); 3159 if ((sc->sc_flags & G_RAID3_DEVICE_FLAG_DESTROY) != 0 || 3160 g_raid3_ndisks(sc, G_RAID3_DISK_STATE_ACTIVE) < sc->sc_ndisks - 1) { 3161 if (acr > 0 || acw > 0 || ace > 0) 3162 error = ENXIO; 3163 goto end; 3164 } 3165 if (dcw == 0) 3166 g_raid3_idle(sc, dcw); 3167 if ((sc->sc_flags & G_RAID3_DEVICE_FLAG_DESTROYING) != 0) { 3168 if (acr > 0 || acw > 0 || ace > 0) { 3169 error = ENXIO; 3170 goto end; 3171 } 3172 if (dcr == 0 && dcw == 0 && dce == 0) { 3173 g_post_event(g_raid3_destroy_delayed, sc, M_WAITOK, 3174 sc, NULL); 3175 } 3176 } 3177 end: 3178 sx_xunlock(&sc->sc_lock); 3179 g_topology_lock(); 3180 return (error); 3181 } 3182 3183 static struct g_geom * 3184 g_raid3_create(struct g_class *mp, const struct g_raid3_metadata *md) 3185 { 3186 struct g_raid3_softc *sc; 3187 struct g_geom *gp; 3188 int error, timeout; 3189 u_int n; 3190 3191 g_topology_assert(); 3192 G_RAID3_DEBUG(1, "Creating device %s (id=%u).", md->md_name, md->md_id); 3193 3194 /* One disk is minimum. */ 3195 if (md->md_all < 1) 3196 return (NULL); 3197 /* 3198 * Action geom. 3199 */ 3200 gp = g_new_geom(mp, md->md_name); 3201 sc = malloc(sizeof(*sc), M_RAID3, M_WAITOK | M_ZERO); 3202 sc->sc_disks = malloc(sizeof(struct g_raid3_disk) * md->md_all, M_RAID3, 3203 M_WAITOK | M_ZERO); 3204 gp->start = g_raid3_start; 3205 gp->orphan = g_raid3_orphan; 3206 gp->access = g_raid3_access; 3207 gp->dumpconf = g_raid3_dumpconf; 3208 3209 sc->sc_id = md->md_id; 3210 sc->sc_mediasize = md->md_mediasize; 3211 sc->sc_sectorsize = md->md_sectorsize; 3212 sc->sc_ndisks = md->md_all; 3213 sc->sc_round_robin = 0; 3214 sc->sc_flags = md->md_mflags; 3215 sc->sc_bump_id = 0; 3216 sc->sc_idle = 1; 3217 sc->sc_last_write = time_uptime; 3218 sc->sc_writes = 0; 3219 sc->sc_refcnt = 1; 3220 for (n = 0; n < sc->sc_ndisks; n++) { 3221 sc->sc_disks[n].d_softc = sc; 3222 sc->sc_disks[n].d_no = n; 3223 sc->sc_disks[n].d_state = G_RAID3_DISK_STATE_NODISK; 3224 } 3225 sx_init(&sc->sc_lock, "graid3:lock"); 3226 bioq_init(&sc->sc_queue); 3227 mtx_init(&sc->sc_queue_mtx, "graid3:queue", NULL, MTX_DEF); 3228 bioq_init(&sc->sc_regular_delayed); 3229 bioq_init(&sc->sc_inflight); 3230 bioq_init(&sc->sc_sync_delayed); 3231 TAILQ_INIT(&sc->sc_events); 3232 mtx_init(&sc->sc_events_mtx, "graid3:events", NULL, MTX_DEF); 3233 callout_init(&sc->sc_callout, 1); 3234 sc->sc_state = G_RAID3_DEVICE_STATE_STARTING; 3235 gp->softc = sc; 3236 sc->sc_geom = gp; 3237 sc->sc_provider = NULL; 3238 /* 3239 * Synchronization geom. 3240 */ 3241 gp = g_new_geomf(mp, "%s.sync", md->md_name); 3242 gp->softc = sc; 3243 gp->orphan = g_raid3_orphan; 3244 sc->sc_sync.ds_geom = gp; 3245 3246 if (!g_raid3_use_malloc) { 3247 sc->sc_zones[G_RAID3_ZONE_64K].sz_zone = uma_zcreate("gr3:64k", 3248 65536, g_raid3_uma_ctor, g_raid3_uma_dtor, NULL, NULL, 3249 UMA_ALIGN_PTR, 0); 3250 sc->sc_zones[G_RAID3_ZONE_64K].sz_inuse = 0; 3251 sc->sc_zones[G_RAID3_ZONE_64K].sz_max = g_raid3_n64k; 3252 sc->sc_zones[G_RAID3_ZONE_64K].sz_requested = 3253 sc->sc_zones[G_RAID3_ZONE_64K].sz_failed = 0; 3254 sc->sc_zones[G_RAID3_ZONE_16K].sz_zone = uma_zcreate("gr3:16k", 3255 16384, g_raid3_uma_ctor, g_raid3_uma_dtor, NULL, NULL, 3256 UMA_ALIGN_PTR, 0); 3257 sc->sc_zones[G_RAID3_ZONE_16K].sz_inuse = 0; 3258 sc->sc_zones[G_RAID3_ZONE_16K].sz_max = g_raid3_n16k; 3259 sc->sc_zones[G_RAID3_ZONE_16K].sz_requested = 3260 sc->sc_zones[G_RAID3_ZONE_16K].sz_failed = 0; 3261 sc->sc_zones[G_RAID3_ZONE_4K].sz_zone = uma_zcreate("gr3:4k", 3262 4096, g_raid3_uma_ctor, g_raid3_uma_dtor, NULL, NULL, 3263 UMA_ALIGN_PTR, 0); 3264 sc->sc_zones[G_RAID3_ZONE_4K].sz_inuse = 0; 3265 sc->sc_zones[G_RAID3_ZONE_4K].sz_max = g_raid3_n4k; 3266 sc->sc_zones[G_RAID3_ZONE_4K].sz_requested = 3267 sc->sc_zones[G_RAID3_ZONE_4K].sz_failed = 0; 3268 } 3269 3270 error = kproc_create(g_raid3_worker, sc, &sc->sc_worker, 0, 0, 3271 "g_raid3 %s", md->md_name); 3272 if (error != 0) { 3273 G_RAID3_DEBUG(1, "Cannot create kernel thread for %s.", 3274 sc->sc_name); 3275 g_destroy_geom(sc->sc_geom); 3276 g_raid3_free_device(sc); 3277 return (NULL); 3278 } 3279 3280 G_RAID3_DEBUG(1, "Device %s created (%u components, id=%u).", 3281 sc->sc_name, sc->sc_ndisks, sc->sc_id); 3282 3283 sc->sc_rootmount = root_mount_hold("GRAID3"); 3284 G_RAID3_DEBUG(1, "root_mount_hold %p", sc->sc_rootmount); 3285 3286 /* 3287 * Schedule startup timeout. 3288 */ 3289 timeout = atomic_load_acq_int(&g_raid3_timeout); 3290 sc->sc_timeout_event = malloc(sizeof(struct g_raid3_event), M_RAID3, 3291 M_WAITOK); 3292 callout_reset(&sc->sc_callout, timeout * hz, g_raid3_go, sc); 3293 return (sc->sc_geom); 3294 } 3295 3296 int 3297 g_raid3_destroy(struct g_raid3_softc *sc, int how) 3298 { 3299 struct g_provider *pp; 3300 3301 g_topology_assert_not(); 3302 sx_assert(&sc->sc_lock, SX_XLOCKED); 3303 3304 pp = sc->sc_provider; 3305 if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) { 3306 switch (how) { 3307 case G_RAID3_DESTROY_SOFT: 3308 G_RAID3_DEBUG(1, 3309 "Device %s is still open (r%dw%de%d).", pp->name, 3310 pp->acr, pp->acw, pp->ace); 3311 return (EBUSY); 3312 case G_RAID3_DESTROY_DELAYED: 3313 G_RAID3_DEBUG(1, 3314 "Device %s will be destroyed on last close.", 3315 pp->name); 3316 if (sc->sc_syncdisk != NULL) 3317 g_raid3_sync_stop(sc, 1); 3318 sc->sc_flags |= G_RAID3_DEVICE_FLAG_DESTROYING; 3319 return (EBUSY); 3320 case G_RAID3_DESTROY_HARD: 3321 G_RAID3_DEBUG(1, "Device %s is still open, so it " 3322 "can't be definitely removed.", pp->name); 3323 break; 3324 } 3325 } 3326 3327 g_topology_lock(); 3328 if (sc->sc_geom->softc == NULL) { 3329 g_topology_unlock(); 3330 return (0); 3331 } 3332 sc->sc_geom->softc = NULL; 3333 sc->sc_sync.ds_geom->softc = NULL; 3334 g_topology_unlock(); 3335 3336 sc->sc_flags |= G_RAID3_DEVICE_FLAG_DESTROY; 3337 sc->sc_flags |= G_RAID3_DEVICE_FLAG_WAIT; 3338 G_RAID3_DEBUG(4, "%s: Waking up %p.", __func__, sc); 3339 sx_xunlock(&sc->sc_lock); 3340 mtx_lock(&sc->sc_queue_mtx); 3341 wakeup(sc); 3342 wakeup(&sc->sc_queue); 3343 mtx_unlock(&sc->sc_queue_mtx); 3344 G_RAID3_DEBUG(4, "%s: Sleeping %p.", __func__, &sc->sc_worker); 3345 while (sc->sc_worker != NULL) 3346 tsleep(&sc->sc_worker, PRIBIO, "r3:destroy", hz / 5); 3347 G_RAID3_DEBUG(4, "%s: Woken up %p.", __func__, &sc->sc_worker); 3348 sx_xlock(&sc->sc_lock); 3349 g_raid3_destroy_device(sc); 3350 return (0); 3351 } 3352 3353 static void 3354 g_raid3_taste_orphan(struct g_consumer *cp) 3355 { 3356 3357 KASSERT(1 == 0, ("%s called while tasting %s.", __func__, 3358 cp->provider->name)); 3359 } 3360 3361 static struct g_geom * 3362 g_raid3_taste(struct g_class *mp, struct g_provider *pp, int flags __unused) 3363 { 3364 struct g_raid3_metadata md; 3365 struct g_raid3_softc *sc; 3366 struct g_consumer *cp; 3367 struct g_geom *gp; 3368 int error; 3369 3370 g_topology_assert(); 3371 g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name); 3372 G_RAID3_DEBUG(2, "Tasting %s.", pp->name); 3373 3374 gp = g_new_geom(mp, "raid3:taste"); 3375 /* This orphan function should be never called. */ 3376 gp->orphan = g_raid3_taste_orphan; 3377 cp = g_new_consumer(gp); 3378 cp->flags |= G_CF_DIRECT_SEND | G_CF_DIRECT_RECEIVE; 3379 error = g_attach(cp, pp); 3380 if (error == 0) { 3381 error = g_raid3_read_metadata(cp, &md); 3382 g_detach(cp); 3383 } 3384 g_destroy_consumer(cp); 3385 g_destroy_geom(gp); 3386 if (error != 0) 3387 return (NULL); 3388 gp = NULL; 3389 3390 if (md.md_provider[0] != '\0' && 3391 !g_compare_names(md.md_provider, pp->name)) 3392 return (NULL); 3393 if (md.md_provsize != 0 && md.md_provsize != pp->mediasize) 3394 return (NULL); 3395 if (g_raid3_debug >= 2) 3396 raid3_metadata_dump(&md); 3397 3398 /* 3399 * Let's check if device already exists. 3400 */ 3401 sc = NULL; 3402 LIST_FOREACH(gp, &mp->geom, geom) { 3403 sc = gp->softc; 3404 if (sc == NULL) 3405 continue; 3406 if (sc->sc_sync.ds_geom == gp) 3407 continue; 3408 if (strcmp(md.md_name, sc->sc_name) != 0) 3409 continue; 3410 if (md.md_id != sc->sc_id) { 3411 G_RAID3_DEBUG(0, "Device %s already configured.", 3412 sc->sc_name); 3413 return (NULL); 3414 } 3415 break; 3416 } 3417 if (gp == NULL) { 3418 gp = g_raid3_create(mp, &md); 3419 if (gp == NULL) { 3420 G_RAID3_DEBUG(0, "Cannot create device %s.", 3421 md.md_name); 3422 return (NULL); 3423 } 3424 sc = gp->softc; 3425 } 3426 G_RAID3_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); 3427 g_topology_unlock(); 3428 sx_xlock(&sc->sc_lock); 3429 error = g_raid3_add_disk(sc, pp, &md); 3430 if (error != 0) { 3431 G_RAID3_DEBUG(0, "Cannot add disk %s to %s (error=%d).", 3432 pp->name, gp->name, error); 3433 if (g_raid3_ndisks(sc, G_RAID3_DISK_STATE_NODISK) == 3434 sc->sc_ndisks) { 3435 g_cancel_event(sc); 3436 g_raid3_destroy(sc, G_RAID3_DESTROY_HARD); 3437 g_topology_lock(); 3438 return (NULL); 3439 } 3440 gp = NULL; 3441 } 3442 sx_xunlock(&sc->sc_lock); 3443 g_topology_lock(); 3444 return (gp); 3445 } 3446 3447 static int 3448 g_raid3_destroy_geom(struct gctl_req *req __unused, struct g_class *mp __unused, 3449 struct g_geom *gp) 3450 { 3451 struct g_raid3_softc *sc; 3452 int error; 3453 3454 g_topology_unlock(); 3455 sc = gp->softc; 3456 sx_xlock(&sc->sc_lock); 3457 g_cancel_event(sc); 3458 error = g_raid3_destroy(gp->softc, G_RAID3_DESTROY_SOFT); 3459 if (error != 0) 3460 sx_xunlock(&sc->sc_lock); 3461 g_topology_lock(); 3462 return (error); 3463 } 3464 3465 static void 3466 g_raid3_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 3467 struct g_consumer *cp, struct g_provider *pp) 3468 { 3469 struct g_raid3_softc *sc; 3470 3471 g_topology_assert(); 3472 3473 sc = gp->softc; 3474 if (sc == NULL) 3475 return; 3476 /* Skip synchronization geom. */ 3477 if (gp == sc->sc_sync.ds_geom) 3478 return; 3479 if (pp != NULL) { 3480 /* Nothing here. */ 3481 } else if (cp != NULL) { 3482 struct g_raid3_disk *disk; 3483 3484 disk = cp->private; 3485 if (disk == NULL) 3486 return; 3487 g_topology_unlock(); 3488 sx_xlock(&sc->sc_lock); 3489 sbuf_printf(sb, "%s<Type>", indent); 3490 if (disk->d_no == sc->sc_ndisks - 1) 3491 sbuf_cat(sb, "PARITY"); 3492 else 3493 sbuf_cat(sb, "DATA"); 3494 sbuf_cat(sb, "</Type>\n"); 3495 sbuf_printf(sb, "%s<Number>%u</Number>\n", indent, 3496 (u_int)disk->d_no); 3497 if (disk->d_state == G_RAID3_DISK_STATE_SYNCHRONIZING) { 3498 sbuf_printf(sb, "%s<Synchronized>", indent); 3499 if (disk->d_sync.ds_offset == 0) 3500 sbuf_cat(sb, "0%"); 3501 else { 3502 sbuf_printf(sb, "%u%%", 3503 (u_int)((disk->d_sync.ds_offset * 100) / 3504 (sc->sc_mediasize / (sc->sc_ndisks - 1)))); 3505 } 3506 sbuf_cat(sb, "</Synchronized>\n"); 3507 if (disk->d_sync.ds_offset > 0) { 3508 sbuf_printf(sb, "%s<BytesSynced>%jd" 3509 "</BytesSynced>\n", indent, 3510 (intmax_t)disk->d_sync.ds_offset); 3511 } 3512 } 3513 sbuf_printf(sb, "%s<SyncID>%u</SyncID>\n", indent, 3514 disk->d_sync.ds_syncid); 3515 sbuf_printf(sb, "%s<GenID>%u</GenID>\n", indent, disk->d_genid); 3516 sbuf_printf(sb, "%s<Flags>", indent); 3517 if (disk->d_flags == 0) 3518 sbuf_cat(sb, "NONE"); 3519 else { 3520 int first = 1; 3521 3522 #define ADD_FLAG(flag, name) do { \ 3523 if ((disk->d_flags & (flag)) != 0) { \ 3524 if (!first) \ 3525 sbuf_cat(sb, ", "); \ 3526 else \ 3527 first = 0; \ 3528 sbuf_cat(sb, name); \ 3529 } \ 3530 } while (0) 3531 ADD_FLAG(G_RAID3_DISK_FLAG_DIRTY, "DIRTY"); 3532 ADD_FLAG(G_RAID3_DISK_FLAG_HARDCODED, "HARDCODED"); 3533 ADD_FLAG(G_RAID3_DISK_FLAG_SYNCHRONIZING, 3534 "SYNCHRONIZING"); 3535 ADD_FLAG(G_RAID3_DISK_FLAG_FORCE_SYNC, "FORCE_SYNC"); 3536 ADD_FLAG(G_RAID3_DISK_FLAG_BROKEN, "BROKEN"); 3537 #undef ADD_FLAG 3538 } 3539 sbuf_cat(sb, "</Flags>\n"); 3540 sbuf_printf(sb, "%s<State>%s</State>\n", indent, 3541 g_raid3_disk_state2str(disk->d_state)); 3542 sx_xunlock(&sc->sc_lock); 3543 g_topology_lock(); 3544 } else { 3545 g_topology_unlock(); 3546 sx_xlock(&sc->sc_lock); 3547 if (!g_raid3_use_malloc) { 3548 sbuf_printf(sb, 3549 "%s<Zone4kRequested>%u</Zone4kRequested>\n", indent, 3550 sc->sc_zones[G_RAID3_ZONE_4K].sz_requested); 3551 sbuf_printf(sb, 3552 "%s<Zone4kFailed>%u</Zone4kFailed>\n", indent, 3553 sc->sc_zones[G_RAID3_ZONE_4K].sz_failed); 3554 sbuf_printf(sb, 3555 "%s<Zone16kRequested>%u</Zone16kRequested>\n", indent, 3556 sc->sc_zones[G_RAID3_ZONE_16K].sz_requested); 3557 sbuf_printf(sb, 3558 "%s<Zone16kFailed>%u</Zone16kFailed>\n", indent, 3559 sc->sc_zones[G_RAID3_ZONE_16K].sz_failed); 3560 sbuf_printf(sb, 3561 "%s<Zone64kRequested>%u</Zone64kRequested>\n", indent, 3562 sc->sc_zones[G_RAID3_ZONE_64K].sz_requested); 3563 sbuf_printf(sb, 3564 "%s<Zone64kFailed>%u</Zone64kFailed>\n", indent, 3565 sc->sc_zones[G_RAID3_ZONE_64K].sz_failed); 3566 } 3567 sbuf_printf(sb, "%s<ID>%u</ID>\n", indent, (u_int)sc->sc_id); 3568 sbuf_printf(sb, "%s<SyncID>%u</SyncID>\n", indent, sc->sc_syncid); 3569 sbuf_printf(sb, "%s<GenID>%u</GenID>\n", indent, sc->sc_genid); 3570 sbuf_printf(sb, "%s<Flags>", indent); 3571 if (sc->sc_flags == 0) 3572 sbuf_cat(sb, "NONE"); 3573 else { 3574 int first = 1; 3575 3576 #define ADD_FLAG(flag, name) do { \ 3577 if ((sc->sc_flags & (flag)) != 0) { \ 3578 if (!first) \ 3579 sbuf_cat(sb, ", "); \ 3580 else \ 3581 first = 0; \ 3582 sbuf_cat(sb, name); \ 3583 } \ 3584 } while (0) 3585 ADD_FLAG(G_RAID3_DEVICE_FLAG_NOFAILSYNC, "NOFAILSYNC"); 3586 ADD_FLAG(G_RAID3_DEVICE_FLAG_NOAUTOSYNC, "NOAUTOSYNC"); 3587 ADD_FLAG(G_RAID3_DEVICE_FLAG_ROUND_ROBIN, 3588 "ROUND-ROBIN"); 3589 ADD_FLAG(G_RAID3_DEVICE_FLAG_VERIFY, "VERIFY"); 3590 #undef ADD_FLAG 3591 } 3592 sbuf_cat(sb, "</Flags>\n"); 3593 sbuf_printf(sb, "%s<Components>%u</Components>\n", indent, 3594 sc->sc_ndisks); 3595 sbuf_printf(sb, "%s<State>%s</State>\n", indent, 3596 g_raid3_device_state2str(sc->sc_state)); 3597 sx_xunlock(&sc->sc_lock); 3598 g_topology_lock(); 3599 } 3600 } 3601 3602 static void 3603 g_raid3_shutdown_post_sync(void *arg, int howto) 3604 { 3605 struct g_class *mp; 3606 struct g_geom *gp, *gp2; 3607 struct g_raid3_softc *sc; 3608 int error; 3609 3610 if ((howto & RB_NOSYNC) != 0) 3611 return; 3612 3613 mp = arg; 3614 g_topology_lock(); 3615 g_raid3_shutdown = 1; 3616 LIST_FOREACH_SAFE(gp, &mp->geom, geom, gp2) { 3617 if ((sc = gp->softc) == NULL) 3618 continue; 3619 /* Skip synchronization geom. */ 3620 if (gp == sc->sc_sync.ds_geom) 3621 continue; 3622 g_topology_unlock(); 3623 sx_xlock(&sc->sc_lock); 3624 g_raid3_idle(sc, -1); 3625 g_cancel_event(sc); 3626 error = g_raid3_destroy(sc, G_RAID3_DESTROY_DELAYED); 3627 if (error != 0) 3628 sx_xunlock(&sc->sc_lock); 3629 g_topology_lock(); 3630 } 3631 g_topology_unlock(); 3632 } 3633 3634 static void 3635 g_raid3_init(struct g_class *mp) 3636 { 3637 3638 g_raid3_post_sync = EVENTHANDLER_REGISTER(shutdown_post_sync, 3639 g_raid3_shutdown_post_sync, mp, SHUTDOWN_PRI_FIRST); 3640 if (g_raid3_post_sync == NULL) 3641 G_RAID3_DEBUG(0, "Warning! Cannot register shutdown event."); 3642 } 3643 3644 static void 3645 g_raid3_fini(struct g_class *mp) 3646 { 3647 3648 if (g_raid3_post_sync != NULL) 3649 EVENTHANDLER_DEREGISTER(shutdown_post_sync, g_raid3_post_sync); 3650 } 3651 3652 DECLARE_GEOM_CLASS(g_raid3_class, g_raid3); 3653 MODULE_VERSION(geom_raid3, 0); 3654