1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2010 Alexander Motin <mav@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/cdefs.h> 30 #include <sys/param.h> 31 #include <sys/bio.h> 32 #include <sys/endian.h> 33 #include <sys/kernel.h> 34 #include <sys/kobj.h> 35 #include <sys/limits.h> 36 #include <sys/lock.h> 37 #include <sys/malloc.h> 38 #include <sys/mutex.h> 39 #include <sys/sysctl.h> 40 #include <sys/systm.h> 41 #include <geom/geom.h> 42 #include <geom/geom_dbg.h> 43 #include "geom/raid/g_raid.h" 44 #include "g_raid_tr_if.h" 45 46 #define N 2 47 48 SYSCTL_DECL(_kern_geom_raid_raid1e); 49 50 #define RAID1E_REBUILD_SLAB (1 << 20) /* One transation in a rebuild */ 51 static int g_raid1e_rebuild_slab = RAID1E_REBUILD_SLAB; 52 SYSCTL_UINT(_kern_geom_raid_raid1e, OID_AUTO, rebuild_slab_size, CTLFLAG_RWTUN, 53 &g_raid1e_rebuild_slab, 0, 54 "Amount of the disk to rebuild each read/write cycle of the rebuild."); 55 56 #define RAID1E_REBUILD_FAIR_IO 20 /* use 1/x of the available I/O */ 57 static int g_raid1e_rebuild_fair_io = RAID1E_REBUILD_FAIR_IO; 58 SYSCTL_UINT(_kern_geom_raid_raid1e, OID_AUTO, rebuild_fair_io, CTLFLAG_RWTUN, 59 &g_raid1e_rebuild_fair_io, 0, 60 "Fraction of the I/O bandwidth to use when disk busy for rebuild."); 61 62 #define RAID1E_REBUILD_CLUSTER_IDLE 100 63 static int g_raid1e_rebuild_cluster_idle = RAID1E_REBUILD_CLUSTER_IDLE; 64 SYSCTL_UINT(_kern_geom_raid_raid1e, OID_AUTO, rebuild_cluster_idle, CTLFLAG_RWTUN, 65 &g_raid1e_rebuild_cluster_idle, 0, 66 "Number of slabs to do each time we trigger a rebuild cycle"); 67 68 #define RAID1E_REBUILD_META_UPDATE 1024 /* update meta data every 1GB or so */ 69 static int g_raid1e_rebuild_meta_update = RAID1E_REBUILD_META_UPDATE; 70 SYSCTL_UINT(_kern_geom_raid_raid1e, OID_AUTO, rebuild_meta_update, CTLFLAG_RWTUN, 71 &g_raid1e_rebuild_meta_update, 0, 72 "When to update the meta data."); 73 74 static MALLOC_DEFINE(M_TR_RAID1E, "tr_raid1e_data", "GEOM_RAID RAID1E data"); 75 76 #define TR_RAID1E_NONE 0 77 #define TR_RAID1E_REBUILD 1 78 #define TR_RAID1E_RESYNC 2 79 80 #define TR_RAID1E_F_DOING_SOME 0x1 81 #define TR_RAID1E_F_LOCKED 0x2 82 #define TR_RAID1E_F_ABORT 0x4 83 84 struct g_raid_tr_raid1e_object { 85 struct g_raid_tr_object trso_base; 86 int trso_starting; 87 int trso_stopping; 88 int trso_type; 89 int trso_recover_slabs; /* slabs before rest */ 90 int trso_fair_io; 91 int trso_meta_update; 92 int trso_flags; 93 struct g_raid_subdisk *trso_failed_sd; /* like per volume */ 94 void *trso_buffer; /* Buffer space */ 95 off_t trso_lock_pos; /* Locked range start. */ 96 off_t trso_lock_len; /* Locked range length. */ 97 struct bio trso_bio; 98 }; 99 100 static g_raid_tr_taste_t g_raid_tr_taste_raid1e; 101 static g_raid_tr_event_t g_raid_tr_event_raid1e; 102 static g_raid_tr_start_t g_raid_tr_start_raid1e; 103 static g_raid_tr_stop_t g_raid_tr_stop_raid1e; 104 static g_raid_tr_iostart_t g_raid_tr_iostart_raid1e; 105 static g_raid_tr_iodone_t g_raid_tr_iodone_raid1e; 106 static g_raid_tr_kerneldump_t g_raid_tr_kerneldump_raid1e; 107 static g_raid_tr_locked_t g_raid_tr_locked_raid1e; 108 static g_raid_tr_idle_t g_raid_tr_idle_raid1e; 109 static g_raid_tr_free_t g_raid_tr_free_raid1e; 110 111 static kobj_method_t g_raid_tr_raid1e_methods[] = { 112 KOBJMETHOD(g_raid_tr_taste, g_raid_tr_taste_raid1e), 113 KOBJMETHOD(g_raid_tr_event, g_raid_tr_event_raid1e), 114 KOBJMETHOD(g_raid_tr_start, g_raid_tr_start_raid1e), 115 KOBJMETHOD(g_raid_tr_stop, g_raid_tr_stop_raid1e), 116 KOBJMETHOD(g_raid_tr_iostart, g_raid_tr_iostart_raid1e), 117 KOBJMETHOD(g_raid_tr_iodone, g_raid_tr_iodone_raid1e), 118 KOBJMETHOD(g_raid_tr_kerneldump, g_raid_tr_kerneldump_raid1e), 119 KOBJMETHOD(g_raid_tr_locked, g_raid_tr_locked_raid1e), 120 KOBJMETHOD(g_raid_tr_idle, g_raid_tr_idle_raid1e), 121 KOBJMETHOD(g_raid_tr_free, g_raid_tr_free_raid1e), 122 { 0, 0 } 123 }; 124 125 static struct g_raid_tr_class g_raid_tr_raid1e_class = { 126 "RAID1E", 127 g_raid_tr_raid1e_methods, 128 sizeof(struct g_raid_tr_raid1e_object), 129 .trc_enable = 1, 130 .trc_priority = 200, 131 .trc_accept_unmapped = 1 132 }; 133 134 static void g_raid_tr_raid1e_rebuild_abort(struct g_raid_tr_object *tr); 135 static void g_raid_tr_raid1e_maybe_rebuild(struct g_raid_tr_object *tr, 136 struct g_raid_subdisk *sd); 137 static int g_raid_tr_raid1e_select_read_disk(struct g_raid_volume *vol, 138 int no, off_t off, off_t len, u_int mask); 139 140 static inline void 141 V2P(struct g_raid_volume *vol, off_t virt, 142 int *disk, off_t *offset, off_t *start) 143 { 144 off_t nstrip; 145 u_int strip_size; 146 147 strip_size = vol->v_strip_size; 148 /* Strip number. */ 149 nstrip = virt / strip_size; 150 /* Start position in strip. */ 151 *start = virt % strip_size; 152 /* Disk number. */ 153 *disk = (nstrip * N) % vol->v_disks_count; 154 /* Strip start position in disk. */ 155 *offset = ((nstrip * N) / vol->v_disks_count) * strip_size; 156 } 157 158 static inline void 159 P2V(struct g_raid_volume *vol, int disk, off_t offset, 160 off_t *virt, int *copy) 161 { 162 off_t nstrip, start; 163 u_int strip_size; 164 165 strip_size = vol->v_strip_size; 166 /* Start position in strip. */ 167 start = offset % strip_size; 168 /* Physical strip number. */ 169 nstrip = (offset / strip_size) * vol->v_disks_count + disk; 170 /* Number of physical strip (copy) inside virtual strip. */ 171 *copy = nstrip % N; 172 /* Offset in virtual space. */ 173 *virt = (nstrip / N) * strip_size + start; 174 } 175 176 static int 177 g_raid_tr_taste_raid1e(struct g_raid_tr_object *tr, struct g_raid_volume *vol) 178 { 179 struct g_raid_tr_raid1e_object *trs; 180 181 trs = (struct g_raid_tr_raid1e_object *)tr; 182 if (tr->tro_volume->v_raid_level != G_RAID_VOLUME_RL_RAID1E || 183 tr->tro_volume->v_raid_level_qualifier != G_RAID_VOLUME_RLQ_R1EA) 184 return (G_RAID_TR_TASTE_FAIL); 185 trs->trso_starting = 1; 186 return (G_RAID_TR_TASTE_SUCCEED); 187 } 188 189 static int 190 g_raid_tr_update_state_raid1e_even(struct g_raid_volume *vol) 191 { 192 struct g_raid_softc *sc; 193 struct g_raid_subdisk *sd, *bestsd, *worstsd; 194 int i, j, state, sstate; 195 196 sc = vol->v_softc; 197 state = G_RAID_VOLUME_S_OPTIMAL; 198 for (i = 0; i < vol->v_disks_count / N; i++) { 199 bestsd = &vol->v_subdisks[i * N]; 200 for (j = 1; j < N; j++) { 201 sd = &vol->v_subdisks[i * N + j]; 202 if (sd->sd_state > bestsd->sd_state) 203 bestsd = sd; 204 else if (sd->sd_state == bestsd->sd_state && 205 (sd->sd_state == G_RAID_SUBDISK_S_REBUILD || 206 sd->sd_state == G_RAID_SUBDISK_S_RESYNC) && 207 sd->sd_rebuild_pos > bestsd->sd_rebuild_pos) 208 bestsd = sd; 209 } 210 if (bestsd->sd_state >= G_RAID_SUBDISK_S_UNINITIALIZED && 211 bestsd->sd_state != G_RAID_SUBDISK_S_ACTIVE) { 212 /* We found reasonable candidate. */ 213 G_RAID_DEBUG1(1, sc, 214 "Promote subdisk %s:%d from %s to ACTIVE.", 215 vol->v_name, bestsd->sd_pos, 216 g_raid_subdisk_state2str(bestsd->sd_state)); 217 g_raid_change_subdisk_state(bestsd, 218 G_RAID_SUBDISK_S_ACTIVE); 219 g_raid_write_metadata(sc, 220 vol, bestsd, bestsd->sd_disk); 221 } 222 worstsd = &vol->v_subdisks[i * N]; 223 for (j = 1; j < N; j++) { 224 sd = &vol->v_subdisks[i * N + j]; 225 if (sd->sd_state < worstsd->sd_state) 226 worstsd = sd; 227 } 228 if (worstsd->sd_state == G_RAID_SUBDISK_S_ACTIVE) 229 sstate = G_RAID_VOLUME_S_OPTIMAL; 230 else if (worstsd->sd_state >= G_RAID_SUBDISK_S_STALE) 231 sstate = G_RAID_VOLUME_S_SUBOPTIMAL; 232 else if (bestsd->sd_state == G_RAID_SUBDISK_S_ACTIVE) 233 sstate = G_RAID_VOLUME_S_DEGRADED; 234 else 235 sstate = G_RAID_VOLUME_S_BROKEN; 236 if (sstate < state) 237 state = sstate; 238 } 239 return (state); 240 } 241 242 static int 243 g_raid_tr_update_state_raid1e_odd(struct g_raid_volume *vol) 244 { 245 struct g_raid_softc *sc; 246 struct g_raid_subdisk *sd, *bestsd, *worstsd; 247 int i, j, state, sstate; 248 249 sc = vol->v_softc; 250 if (g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_ACTIVE) == 251 vol->v_disks_count) 252 return (G_RAID_VOLUME_S_OPTIMAL); 253 for (i = 0; i < vol->v_disks_count; i++) { 254 sd = &vol->v_subdisks[i]; 255 if (sd->sd_state == G_RAID_SUBDISK_S_UNINITIALIZED) { 256 /* We found reasonable candidate. */ 257 G_RAID_DEBUG1(1, sc, 258 "Promote subdisk %s:%d from %s to STALE.", 259 vol->v_name, sd->sd_pos, 260 g_raid_subdisk_state2str(sd->sd_state)); 261 g_raid_change_subdisk_state(sd, 262 G_RAID_SUBDISK_S_STALE); 263 g_raid_write_metadata(sc, vol, sd, sd->sd_disk); 264 } 265 } 266 state = G_RAID_VOLUME_S_OPTIMAL; 267 for (i = 0; i < vol->v_disks_count; i++) { 268 bestsd = &vol->v_subdisks[i]; 269 worstsd = &vol->v_subdisks[i]; 270 for (j = 1; j < N; j++) { 271 sd = &vol->v_subdisks[(i + j) % vol->v_disks_count]; 272 if (sd->sd_state > bestsd->sd_state) 273 bestsd = sd; 274 else if (sd->sd_state == bestsd->sd_state && 275 (sd->sd_state == G_RAID_SUBDISK_S_REBUILD || 276 sd->sd_state == G_RAID_SUBDISK_S_RESYNC) && 277 sd->sd_rebuild_pos > bestsd->sd_rebuild_pos) 278 bestsd = sd; 279 if (sd->sd_state < worstsd->sd_state) 280 worstsd = sd; 281 } 282 if (worstsd->sd_state == G_RAID_SUBDISK_S_ACTIVE) 283 sstate = G_RAID_VOLUME_S_OPTIMAL; 284 else if (worstsd->sd_state >= G_RAID_SUBDISK_S_STALE) 285 sstate = G_RAID_VOLUME_S_SUBOPTIMAL; 286 else if (bestsd->sd_state >= G_RAID_SUBDISK_S_STALE) 287 sstate = G_RAID_VOLUME_S_DEGRADED; 288 else 289 sstate = G_RAID_VOLUME_S_BROKEN; 290 if (sstate < state) 291 state = sstate; 292 } 293 return (state); 294 } 295 296 static int 297 g_raid_tr_update_state_raid1e(struct g_raid_volume *vol, 298 struct g_raid_subdisk *sd) 299 { 300 struct g_raid_tr_raid1e_object *trs; 301 struct g_raid_softc *sc; 302 u_int s; 303 304 sc = vol->v_softc; 305 trs = (struct g_raid_tr_raid1e_object *)vol->v_tr; 306 if (trs->trso_stopping && 307 (trs->trso_flags & TR_RAID1E_F_DOING_SOME) == 0) 308 s = G_RAID_VOLUME_S_STOPPED; 309 else if (trs->trso_starting) 310 s = G_RAID_VOLUME_S_STARTING; 311 else { 312 if ((vol->v_disks_count % N) == 0) 313 s = g_raid_tr_update_state_raid1e_even(vol); 314 else 315 s = g_raid_tr_update_state_raid1e_odd(vol); 316 } 317 if (s != vol->v_state) { 318 g_raid_event_send(vol, G_RAID_VOLUME_S_ALIVE(s) ? 319 G_RAID_VOLUME_E_UP : G_RAID_VOLUME_E_DOWN, 320 G_RAID_EVENT_VOLUME); 321 g_raid_change_volume_state(vol, s); 322 if (!trs->trso_starting && !trs->trso_stopping) 323 g_raid_write_metadata(sc, vol, NULL, NULL); 324 } 325 if (!trs->trso_starting && !trs->trso_stopping) 326 g_raid_tr_raid1e_maybe_rebuild(vol->v_tr, sd); 327 return (0); 328 } 329 330 static void 331 g_raid_tr_raid1e_fail_disk(struct g_raid_softc *sc, struct g_raid_subdisk *sd, 332 struct g_raid_disk *disk) 333 { 334 struct g_raid_volume *vol; 335 336 vol = sd->sd_volume; 337 /* 338 * We don't fail the last disk in the pack, since it still has decent 339 * data on it and that's better than failing the disk if it is the root 340 * file system. 341 * 342 * XXX should this be controlled via a tunable? It makes sense for 343 * the volume that has / on it. I can't think of a case where we'd 344 * want the volume to go away on this kind of event. 345 */ 346 if ((g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_ACTIVE) + 347 g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_RESYNC) + 348 g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_STALE) + 349 g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_UNINITIALIZED) < 350 vol->v_disks_count) && 351 (sd->sd_state >= G_RAID_SUBDISK_S_UNINITIALIZED)) 352 return; 353 g_raid_fail_disk(sc, sd, disk); 354 } 355 356 static void 357 g_raid_tr_raid1e_rebuild_done(struct g_raid_tr_raid1e_object *trs) 358 { 359 struct g_raid_volume *vol; 360 struct g_raid_subdisk *sd; 361 362 vol = trs->trso_base.tro_volume; 363 sd = trs->trso_failed_sd; 364 g_raid_write_metadata(vol->v_softc, vol, sd, sd->sd_disk); 365 free(trs->trso_buffer, M_TR_RAID1E); 366 trs->trso_buffer = NULL; 367 trs->trso_flags &= ~TR_RAID1E_F_DOING_SOME; 368 trs->trso_type = TR_RAID1E_NONE; 369 trs->trso_recover_slabs = 0; 370 trs->trso_failed_sd = NULL; 371 g_raid_tr_update_state_raid1e(vol, NULL); 372 } 373 374 static void 375 g_raid_tr_raid1e_rebuild_finish(struct g_raid_tr_object *tr) 376 { 377 struct g_raid_tr_raid1e_object *trs; 378 struct g_raid_subdisk *sd; 379 380 trs = (struct g_raid_tr_raid1e_object *)tr; 381 sd = trs->trso_failed_sd; 382 G_RAID_DEBUG1(0, tr->tro_volume->v_softc, 383 "Subdisk %s:%d-%s rebuild completed.", 384 sd->sd_volume->v_name, sd->sd_pos, 385 sd->sd_disk ? g_raid_get_diskname(sd->sd_disk) : "[none]"); 386 g_raid_change_subdisk_state(sd, G_RAID_SUBDISK_S_ACTIVE); 387 sd->sd_rebuild_pos = 0; 388 g_raid_tr_raid1e_rebuild_done(trs); 389 } 390 391 static void 392 g_raid_tr_raid1e_rebuild_abort(struct g_raid_tr_object *tr) 393 { 394 struct g_raid_tr_raid1e_object *trs; 395 struct g_raid_subdisk *sd; 396 struct g_raid_volume *vol; 397 398 vol = tr->tro_volume; 399 trs = (struct g_raid_tr_raid1e_object *)tr; 400 sd = trs->trso_failed_sd; 401 if (trs->trso_flags & TR_RAID1E_F_DOING_SOME) { 402 G_RAID_DEBUG1(1, vol->v_softc, 403 "Subdisk %s:%d-%s rebuild is aborting.", 404 sd->sd_volume->v_name, sd->sd_pos, 405 sd->sd_disk ? g_raid_get_diskname(sd->sd_disk) : "[none]"); 406 trs->trso_flags |= TR_RAID1E_F_ABORT; 407 } else { 408 G_RAID_DEBUG1(0, vol->v_softc, 409 "Subdisk %s:%d-%s rebuild aborted.", 410 sd->sd_volume->v_name, sd->sd_pos, 411 sd->sd_disk ? g_raid_get_diskname(sd->sd_disk) : "[none]"); 412 trs->trso_flags &= ~TR_RAID1E_F_ABORT; 413 if (trs->trso_flags & TR_RAID1E_F_LOCKED) { 414 trs->trso_flags &= ~TR_RAID1E_F_LOCKED; 415 g_raid_unlock_range(tr->tro_volume, 416 trs->trso_lock_pos, trs->trso_lock_len); 417 } 418 g_raid_tr_raid1e_rebuild_done(trs); 419 } 420 } 421 422 static void 423 g_raid_tr_raid1e_rebuild_some(struct g_raid_tr_object *tr) 424 { 425 struct g_raid_tr_raid1e_object *trs; 426 struct g_raid_softc *sc; 427 struct g_raid_volume *vol; 428 struct g_raid_subdisk *sd; 429 struct bio *bp; 430 off_t len, virtual, vend, offset, start; 431 int disk, copy, best; 432 433 trs = (struct g_raid_tr_raid1e_object *)tr; 434 if (trs->trso_flags & TR_RAID1E_F_DOING_SOME) 435 return; 436 vol = tr->tro_volume; 437 sc = vol->v_softc; 438 sd = trs->trso_failed_sd; 439 440 while (1) { 441 if (sd->sd_rebuild_pos >= sd->sd_size) { 442 g_raid_tr_raid1e_rebuild_finish(tr); 443 return; 444 } 445 /* Get virtual offset from physical rebuild position. */ 446 P2V(vol, sd->sd_pos, sd->sd_rebuild_pos, &virtual, ©); 447 /* Get physical offset back to get first stripe position. */ 448 V2P(vol, virtual, &disk, &offset, &start); 449 /* Calculate contignous data length. */ 450 len = MIN(g_raid1e_rebuild_slab, 451 sd->sd_size - sd->sd_rebuild_pos); 452 if ((vol->v_disks_count % N) != 0) 453 len = MIN(len, vol->v_strip_size - start); 454 /* Find disk with most accurate data. */ 455 best = g_raid_tr_raid1e_select_read_disk(vol, disk, 456 offset + start, len, 0); 457 if (best < 0) { 458 /* There is no any valid disk. */ 459 g_raid_tr_raid1e_rebuild_abort(tr); 460 return; 461 } else if (best != copy) { 462 /* Some other disk has better data. */ 463 break; 464 } 465 /* We have the most accurate data. Skip the range. */ 466 G_RAID_DEBUG1(3, sc, "Skipping rebuild for range %ju - %ju", 467 sd->sd_rebuild_pos, sd->sd_rebuild_pos + len); 468 sd->sd_rebuild_pos += len; 469 } 470 471 bp = &trs->trso_bio; 472 memset(bp, 0, sizeof(*bp)); 473 bp->bio_offset = offset + start + 474 ((disk + best >= vol->v_disks_count) ? vol->v_strip_size : 0); 475 bp->bio_length = len; 476 bp->bio_data = trs->trso_buffer; 477 bp->bio_cmd = BIO_READ; 478 bp->bio_cflags = G_RAID_BIO_FLAG_SYNC; 479 bp->bio_caller1 = &vol->v_subdisks[(disk + best) % vol->v_disks_count]; 480 G_RAID_LOGREQ(3, bp, "Queueing rebuild read"); 481 /* 482 * If we are crossing stripe boundary, correct affected virtual 483 * range we should lock. 484 */ 485 if (start + len > vol->v_strip_size) { 486 P2V(vol, sd->sd_pos, sd->sd_rebuild_pos + len, &vend, ©); 487 len = vend - virtual; 488 } 489 trs->trso_flags |= TR_RAID1E_F_DOING_SOME; 490 trs->trso_flags |= TR_RAID1E_F_LOCKED; 491 trs->trso_lock_pos = virtual; 492 trs->trso_lock_len = len; 493 /* Lock callback starts I/O */ 494 g_raid_lock_range(sd->sd_volume, virtual, len, NULL, bp); 495 } 496 497 static void 498 g_raid_tr_raid1e_rebuild_start(struct g_raid_tr_object *tr) 499 { 500 struct g_raid_volume *vol; 501 struct g_raid_tr_raid1e_object *trs; 502 struct g_raid_subdisk *sd; 503 504 vol = tr->tro_volume; 505 trs = (struct g_raid_tr_raid1e_object *)tr; 506 if (trs->trso_failed_sd) { 507 G_RAID_DEBUG1(1, vol->v_softc, 508 "Already rebuild in start rebuild. pos %jd\n", 509 (intmax_t)trs->trso_failed_sd->sd_rebuild_pos); 510 return; 511 } 512 sd = g_raid_get_subdisk(vol, G_RAID_SUBDISK_S_RESYNC); 513 if (sd == NULL) 514 sd = g_raid_get_subdisk(vol, G_RAID_SUBDISK_S_REBUILD); 515 if (sd == NULL) { 516 sd = g_raid_get_subdisk(vol, G_RAID_SUBDISK_S_STALE); 517 if (sd != NULL) { 518 sd->sd_rebuild_pos = 0; 519 g_raid_change_subdisk_state(sd, 520 G_RAID_SUBDISK_S_RESYNC); 521 g_raid_write_metadata(vol->v_softc, vol, sd, NULL); 522 } else { 523 sd = g_raid_get_subdisk(vol, 524 G_RAID_SUBDISK_S_UNINITIALIZED); 525 if (sd == NULL) 526 sd = g_raid_get_subdisk(vol, 527 G_RAID_SUBDISK_S_NEW); 528 if (sd != NULL) { 529 sd->sd_rebuild_pos = 0; 530 g_raid_change_subdisk_state(sd, 531 G_RAID_SUBDISK_S_REBUILD); 532 g_raid_write_metadata(vol->v_softc, 533 vol, sd, NULL); 534 } 535 } 536 } 537 if (sd == NULL) { 538 G_RAID_DEBUG1(1, vol->v_softc, 539 "No failed disk to rebuild. night night."); 540 return; 541 } 542 trs->trso_failed_sd = sd; 543 G_RAID_DEBUG1(0, vol->v_softc, 544 "Subdisk %s:%d-%s rebuild start at %jd.", 545 sd->sd_volume->v_name, sd->sd_pos, 546 sd->sd_disk ? g_raid_get_diskname(sd->sd_disk) : "[none]", 547 trs->trso_failed_sd->sd_rebuild_pos); 548 trs->trso_type = TR_RAID1E_REBUILD; 549 trs->trso_buffer = malloc(g_raid1e_rebuild_slab, M_TR_RAID1E, M_WAITOK); 550 trs->trso_meta_update = g_raid1e_rebuild_meta_update; 551 g_raid_tr_raid1e_rebuild_some(tr); 552 } 553 554 static void 555 g_raid_tr_raid1e_maybe_rebuild(struct g_raid_tr_object *tr, 556 struct g_raid_subdisk *sd) 557 { 558 struct g_raid_volume *vol; 559 struct g_raid_tr_raid1e_object *trs; 560 int nr; 561 562 vol = tr->tro_volume; 563 trs = (struct g_raid_tr_raid1e_object *)tr; 564 if (trs->trso_stopping) 565 return; 566 nr = g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_REBUILD) + 567 g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_RESYNC); 568 switch(trs->trso_type) { 569 case TR_RAID1E_NONE: 570 if (vol->v_state < G_RAID_VOLUME_S_DEGRADED) 571 return; 572 if (nr == 0) { 573 nr = g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_NEW) + 574 g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_STALE) + 575 g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_UNINITIALIZED); 576 if (nr == 0) 577 return; 578 } 579 g_raid_tr_raid1e_rebuild_start(tr); 580 break; 581 case TR_RAID1E_REBUILD: 582 if (vol->v_state < G_RAID_VOLUME_S_DEGRADED || nr == 0 || 583 trs->trso_failed_sd == sd) 584 g_raid_tr_raid1e_rebuild_abort(tr); 585 break; 586 case TR_RAID1E_RESYNC: 587 break; 588 } 589 } 590 591 static int 592 g_raid_tr_event_raid1e(struct g_raid_tr_object *tr, 593 struct g_raid_subdisk *sd, u_int event) 594 { 595 596 g_raid_tr_update_state_raid1e(tr->tro_volume, sd); 597 return (0); 598 } 599 600 static int 601 g_raid_tr_start_raid1e(struct g_raid_tr_object *tr) 602 { 603 struct g_raid_tr_raid1e_object *trs; 604 struct g_raid_volume *vol; 605 606 trs = (struct g_raid_tr_raid1e_object *)tr; 607 vol = tr->tro_volume; 608 trs->trso_starting = 0; 609 g_raid_tr_update_state_raid1e(vol, NULL); 610 return (0); 611 } 612 613 static int 614 g_raid_tr_stop_raid1e(struct g_raid_tr_object *tr) 615 { 616 struct g_raid_tr_raid1e_object *trs; 617 struct g_raid_volume *vol; 618 619 trs = (struct g_raid_tr_raid1e_object *)tr; 620 vol = tr->tro_volume; 621 trs->trso_starting = 0; 622 trs->trso_stopping = 1; 623 g_raid_tr_update_state_raid1e(vol, NULL); 624 return (0); 625 } 626 627 /* 628 * Select the disk to read from. Take into account: subdisk state, running 629 * error recovery, average disk load, head position and possible cache hits. 630 */ 631 #define ABS(x) (((x) >= 0) ? (x) : (-(x))) 632 static int 633 g_raid_tr_raid1e_select_read_disk(struct g_raid_volume *vol, 634 int no, off_t off, off_t len, u_int mask) 635 { 636 struct g_raid_subdisk *sd; 637 off_t offset; 638 int i, best, prio, bestprio; 639 640 best = -1; 641 bestprio = INT_MAX; 642 for (i = 0; i < N; i++) { 643 sd = &vol->v_subdisks[(no + i) % vol->v_disks_count]; 644 offset = off; 645 if (no + i >= vol->v_disks_count) 646 offset += vol->v_strip_size; 647 648 prio = G_RAID_SUBDISK_LOAD(sd); 649 if ((mask & (1 << sd->sd_pos)) != 0) 650 continue; 651 switch (sd->sd_state) { 652 case G_RAID_SUBDISK_S_ACTIVE: 653 break; 654 case G_RAID_SUBDISK_S_RESYNC: 655 if (offset + off < sd->sd_rebuild_pos) 656 break; 657 /* FALLTHROUGH */ 658 case G_RAID_SUBDISK_S_STALE: 659 prio += i << 24; 660 break; 661 case G_RAID_SUBDISK_S_REBUILD: 662 if (offset + off < sd->sd_rebuild_pos) 663 break; 664 /* FALLTHROUGH */ 665 default: 666 continue; 667 } 668 prio += min(sd->sd_recovery, 255) << 16; 669 /* If disk head is precisely in position - highly prefer it. */ 670 if (G_RAID_SUBDISK_POS(sd) == offset) 671 prio -= 2 * G_RAID_SUBDISK_LOAD_SCALE; 672 else 673 /* If disk head is close to position - prefer it. */ 674 if (ABS(G_RAID_SUBDISK_POS(sd) - offset) < 675 G_RAID_SUBDISK_TRACK_SIZE) 676 prio -= 1 * G_RAID_SUBDISK_LOAD_SCALE; 677 if (prio < bestprio) { 678 bestprio = prio; 679 best = i; 680 } 681 } 682 return (best); 683 } 684 685 static void 686 g_raid_tr_iostart_raid1e_read(struct g_raid_tr_object *tr, struct bio *bp) 687 { 688 struct g_raid_volume *vol; 689 struct g_raid_subdisk *sd; 690 struct bio_queue_head queue; 691 struct bio *cbp; 692 char *addr; 693 off_t offset, start, length, remain; 694 u_int no, strip_size; 695 int best; 696 697 vol = tr->tro_volume; 698 if ((bp->bio_flags & BIO_UNMAPPED) != 0) 699 addr = NULL; 700 else 701 addr = bp->bio_data; 702 strip_size = vol->v_strip_size; 703 V2P(vol, bp->bio_offset, &no, &offset, &start); 704 remain = bp->bio_length; 705 bioq_init(&queue); 706 while (remain > 0) { 707 length = MIN(strip_size - start, remain); 708 best = g_raid_tr_raid1e_select_read_disk(vol, 709 no, offset, length, 0); 710 KASSERT(best >= 0, ("No readable disk in volume %s!", 711 vol->v_name)); 712 no += best; 713 if (no >= vol->v_disks_count) { 714 no -= vol->v_disks_count; 715 offset += strip_size; 716 } 717 cbp = g_clone_bio(bp); 718 if (cbp == NULL) 719 goto failure; 720 cbp->bio_offset = offset + start; 721 cbp->bio_length = length; 722 if ((bp->bio_flags & BIO_UNMAPPED) != 0) { 723 cbp->bio_ma_offset += (uintptr_t)addr; 724 cbp->bio_ma += cbp->bio_ma_offset / PAGE_SIZE; 725 cbp->bio_ma_offset %= PAGE_SIZE; 726 cbp->bio_ma_n = round_page(cbp->bio_ma_offset + 727 cbp->bio_length) / PAGE_SIZE; 728 } else 729 cbp->bio_data = addr; 730 cbp->bio_caller1 = &vol->v_subdisks[no]; 731 bioq_insert_tail(&queue, cbp); 732 no += N - best; 733 if (no >= vol->v_disks_count) { 734 no -= vol->v_disks_count; 735 offset += strip_size; 736 } 737 remain -= length; 738 addr += length; 739 start = 0; 740 } 741 while ((cbp = bioq_takefirst(&queue)) != NULL) { 742 sd = cbp->bio_caller1; 743 cbp->bio_caller1 = NULL; 744 g_raid_subdisk_iostart(sd, cbp); 745 } 746 return; 747 failure: 748 while ((cbp = bioq_takefirst(&queue)) != NULL) 749 g_destroy_bio(cbp); 750 if (bp->bio_error == 0) 751 bp->bio_error = ENOMEM; 752 g_raid_iodone(bp, bp->bio_error); 753 } 754 755 static void 756 g_raid_tr_iostart_raid1e_write(struct g_raid_tr_object *tr, struct bio *bp) 757 { 758 struct g_raid_volume *vol; 759 struct g_raid_subdisk *sd; 760 struct bio_queue_head queue; 761 struct bio *cbp; 762 char *addr; 763 off_t offset, start, length, remain; 764 u_int no, strip_size; 765 int i; 766 767 vol = tr->tro_volume; 768 if ((bp->bio_flags & BIO_UNMAPPED) != 0) 769 addr = NULL; 770 else 771 addr = bp->bio_data; 772 strip_size = vol->v_strip_size; 773 V2P(vol, bp->bio_offset, &no, &offset, &start); 774 remain = bp->bio_length; 775 bioq_init(&queue); 776 while (remain > 0) { 777 length = MIN(strip_size - start, remain); 778 for (i = 0; i < N; i++) { 779 sd = &vol->v_subdisks[no]; 780 switch (sd->sd_state) { 781 case G_RAID_SUBDISK_S_ACTIVE: 782 case G_RAID_SUBDISK_S_STALE: 783 case G_RAID_SUBDISK_S_RESYNC: 784 break; 785 case G_RAID_SUBDISK_S_REBUILD: 786 if (offset + start >= sd->sd_rebuild_pos) 787 goto nextdisk; 788 break; 789 default: 790 goto nextdisk; 791 } 792 cbp = g_clone_bio(bp); 793 if (cbp == NULL) 794 goto failure; 795 cbp->bio_offset = offset + start; 796 cbp->bio_length = length; 797 if ((bp->bio_flags & BIO_UNMAPPED) != 0 && 798 bp->bio_cmd != BIO_DELETE) { 799 cbp->bio_ma_offset += (uintptr_t)addr; 800 cbp->bio_ma += cbp->bio_ma_offset / PAGE_SIZE; 801 cbp->bio_ma_offset %= PAGE_SIZE; 802 cbp->bio_ma_n = round_page(cbp->bio_ma_offset + 803 cbp->bio_length) / PAGE_SIZE; 804 } else 805 cbp->bio_data = addr; 806 cbp->bio_caller1 = sd; 807 bioq_insert_tail(&queue, cbp); 808 nextdisk: 809 if (++no >= vol->v_disks_count) { 810 no = 0; 811 offset += strip_size; 812 } 813 } 814 remain -= length; 815 if (bp->bio_cmd != BIO_DELETE) 816 addr += length; 817 start = 0; 818 } 819 while ((cbp = bioq_takefirst(&queue)) != NULL) { 820 sd = cbp->bio_caller1; 821 cbp->bio_caller1 = NULL; 822 g_raid_subdisk_iostart(sd, cbp); 823 } 824 return; 825 failure: 826 while ((cbp = bioq_takefirst(&queue)) != NULL) 827 g_destroy_bio(cbp); 828 if (bp->bio_error == 0) 829 bp->bio_error = ENOMEM; 830 g_raid_iodone(bp, bp->bio_error); 831 } 832 833 static void 834 g_raid_tr_iostart_raid1e(struct g_raid_tr_object *tr, struct bio *bp) 835 { 836 struct g_raid_volume *vol; 837 struct g_raid_tr_raid1e_object *trs; 838 839 vol = tr->tro_volume; 840 trs = (struct g_raid_tr_raid1e_object *)tr; 841 if (vol->v_state != G_RAID_VOLUME_S_OPTIMAL && 842 vol->v_state != G_RAID_VOLUME_S_SUBOPTIMAL && 843 vol->v_state != G_RAID_VOLUME_S_DEGRADED) { 844 g_raid_iodone(bp, EIO); 845 return; 846 } 847 /* 848 * If we're rebuilding, squeeze in rebuild activity every so often, 849 * even when the disk is busy. Be sure to only count real I/O 850 * to the disk. All 'SPECIAL' I/O is traffic generated to the disk 851 * by this module. 852 */ 853 if (trs->trso_failed_sd != NULL && 854 !(bp->bio_cflags & G_RAID_BIO_FLAG_SPECIAL)) { 855 /* Make this new or running now round short. */ 856 trs->trso_recover_slabs = 0; 857 if (--trs->trso_fair_io <= 0) { 858 trs->trso_fair_io = g_raid1e_rebuild_fair_io; 859 g_raid_tr_raid1e_rebuild_some(tr); 860 } 861 } 862 switch (bp->bio_cmd) { 863 case BIO_READ: 864 g_raid_tr_iostart_raid1e_read(tr, bp); 865 break; 866 case BIO_WRITE: 867 case BIO_DELETE: 868 g_raid_tr_iostart_raid1e_write(tr, bp); 869 break; 870 case BIO_SPEEDUP: 871 case BIO_FLUSH: 872 g_raid_tr_flush_common(tr, bp); 873 break; 874 default: 875 KASSERT(1 == 0, ("Invalid command here: %u (volume=%s)", 876 bp->bio_cmd, vol->v_name)); 877 break; 878 } 879 } 880 881 static void 882 g_raid_tr_iodone_raid1e(struct g_raid_tr_object *tr, 883 struct g_raid_subdisk *sd, struct bio *bp) 884 { 885 struct bio *cbp; 886 struct g_raid_subdisk *nsd; 887 struct g_raid_volume *vol; 888 struct bio *pbp; 889 struct g_raid_tr_raid1e_object *trs; 890 off_t virtual, offset, start; 891 uintptr_t mask; 892 int error, do_write, copy, disk, best; 893 894 trs = (struct g_raid_tr_raid1e_object *)tr; 895 vol = tr->tro_volume; 896 if (bp->bio_cflags & G_RAID_BIO_FLAG_SYNC) { 897 if (trs->trso_type == TR_RAID1E_REBUILD) { 898 nsd = trs->trso_failed_sd; 899 if (bp->bio_cmd == BIO_READ) { 900 /* Immediately abort rebuild, if requested. */ 901 if (trs->trso_flags & TR_RAID1E_F_ABORT) { 902 trs->trso_flags &= ~TR_RAID1E_F_DOING_SOME; 903 g_raid_tr_raid1e_rebuild_abort(tr); 904 return; 905 } 906 907 /* On read error, skip and cross fingers. */ 908 if (bp->bio_error != 0) { 909 G_RAID_LOGREQ(0, bp, 910 "Read error during rebuild (%d), " 911 "possible data loss!", 912 bp->bio_error); 913 goto rebuild_round_done; 914 } 915 916 /* 917 * The read operation finished, queue the 918 * write and get out. 919 */ 920 G_RAID_LOGREQ(3, bp, "Rebuild read done: %d", 921 bp->bio_error); 922 bp->bio_cmd = BIO_WRITE; 923 bp->bio_cflags = G_RAID_BIO_FLAG_SYNC; 924 bp->bio_offset = nsd->sd_rebuild_pos; 925 G_RAID_LOGREQ(3, bp, "Queueing rebuild write."); 926 g_raid_subdisk_iostart(nsd, bp); 927 } else { 928 /* 929 * The write operation just finished. Do 930 * another. We keep cloning the master bio 931 * since it has the right buffers allocated to 932 * it. 933 */ 934 G_RAID_LOGREQ(3, bp, "Rebuild write done: %d", 935 bp->bio_error); 936 if (bp->bio_error != 0 || 937 trs->trso_flags & TR_RAID1E_F_ABORT) { 938 if ((trs->trso_flags & 939 TR_RAID1E_F_ABORT) == 0) { 940 g_raid_tr_raid1e_fail_disk(sd->sd_softc, 941 nsd, nsd->sd_disk); 942 } 943 trs->trso_flags &= ~TR_RAID1E_F_DOING_SOME; 944 g_raid_tr_raid1e_rebuild_abort(tr); 945 return; 946 } 947 rebuild_round_done: 948 trs->trso_flags &= ~TR_RAID1E_F_LOCKED; 949 g_raid_unlock_range(tr->tro_volume, 950 trs->trso_lock_pos, trs->trso_lock_len); 951 nsd->sd_rebuild_pos += bp->bio_length; 952 if (nsd->sd_rebuild_pos >= nsd->sd_size) { 953 g_raid_tr_raid1e_rebuild_finish(tr); 954 return; 955 } 956 957 /* Abort rebuild if we are stopping */ 958 if (trs->trso_stopping) { 959 trs->trso_flags &= ~TR_RAID1E_F_DOING_SOME; 960 g_raid_tr_raid1e_rebuild_abort(tr); 961 return; 962 } 963 964 if (--trs->trso_meta_update <= 0) { 965 g_raid_write_metadata(vol->v_softc, 966 vol, nsd, nsd->sd_disk); 967 trs->trso_meta_update = 968 g_raid1e_rebuild_meta_update; 969 /* Compensate short rebuild I/Os. */ 970 if ((vol->v_disks_count % N) != 0 && 971 vol->v_strip_size < 972 g_raid1e_rebuild_slab) { 973 trs->trso_meta_update *= 974 g_raid1e_rebuild_slab; 975 trs->trso_meta_update /= 976 vol->v_strip_size; 977 } 978 } 979 trs->trso_flags &= ~TR_RAID1E_F_DOING_SOME; 980 if (--trs->trso_recover_slabs <= 0) 981 return; 982 /* Run next rebuild iteration. */ 983 g_raid_tr_raid1e_rebuild_some(tr); 984 } 985 } else if (trs->trso_type == TR_RAID1E_RESYNC) { 986 /* 987 * read good sd, read bad sd in parallel. when both 988 * done, compare the buffers. write good to the bad 989 * if different. do the next bit of work. 990 */ 991 panic("Somehow, we think we're doing a resync"); 992 } 993 return; 994 } 995 pbp = bp->bio_parent; 996 pbp->bio_inbed++; 997 mask = (intptr_t)bp->bio_caller2; 998 if (bp->bio_cmd == BIO_READ && bp->bio_error != 0) { 999 /* 1000 * Read failed on first drive. Retry the read error on 1001 * another disk drive, if available, before erroring out the 1002 * read. 1003 */ 1004 sd->sd_disk->d_read_errs++; 1005 G_RAID_LOGREQ(0, bp, 1006 "Read error (%d), %d read errors total", 1007 bp->bio_error, sd->sd_disk->d_read_errs); 1008 1009 /* 1010 * If there are too many read errors, we move to degraded. 1011 * XXX Do we want to FAIL the drive (eg, make the user redo 1012 * everything to get it back in sync), or just degrade the 1013 * drive, which kicks off a resync? 1014 */ 1015 do_write = 0; 1016 if (sd->sd_disk->d_read_errs > g_raid_read_err_thresh) 1017 g_raid_tr_raid1e_fail_disk(sd->sd_softc, sd, sd->sd_disk); 1018 else if (mask == 0) 1019 do_write = 1; 1020 1021 /* Restore what we were doing. */ 1022 P2V(vol, sd->sd_pos, bp->bio_offset, &virtual, ©); 1023 V2P(vol, virtual, &disk, &offset, &start); 1024 1025 /* Find the other disk, and try to do the I/O to it. */ 1026 mask |= 1 << copy; 1027 best = g_raid_tr_raid1e_select_read_disk(vol, 1028 disk, offset, start, mask); 1029 if (best >= 0 && (cbp = g_clone_bio(pbp)) != NULL) { 1030 disk += best; 1031 if (disk >= vol->v_disks_count) { 1032 disk -= vol->v_disks_count; 1033 offset += vol->v_strip_size; 1034 } 1035 cbp->bio_offset = offset + start; 1036 cbp->bio_length = bp->bio_length; 1037 cbp->bio_data = bp->bio_data; 1038 cbp->bio_ma = bp->bio_ma; 1039 cbp->bio_ma_offset = bp->bio_ma_offset; 1040 cbp->bio_ma_n = bp->bio_ma_n; 1041 g_destroy_bio(bp); 1042 nsd = &vol->v_subdisks[disk]; 1043 G_RAID_LOGREQ(2, cbp, "Retrying read from %d", 1044 nsd->sd_pos); 1045 if (do_write) 1046 mask |= 1 << 31; 1047 if ((mask & (1U << 31)) != 0) 1048 sd->sd_recovery++; 1049 cbp->bio_caller2 = (void *)mask; 1050 if (do_write) { 1051 cbp->bio_caller1 = nsd; 1052 /* Lock callback starts I/O */ 1053 g_raid_lock_range(sd->sd_volume, 1054 virtual, cbp->bio_length, pbp, cbp); 1055 } else { 1056 g_raid_subdisk_iostart(nsd, cbp); 1057 } 1058 return; 1059 } 1060 /* 1061 * We can't retry. Return the original error by falling 1062 * through. This will happen when there's only one good disk. 1063 * We don't need to fail the raid, since its actual state is 1064 * based on the state of the subdisks. 1065 */ 1066 G_RAID_LOGREQ(2, bp, "Couldn't retry read, failing it"); 1067 } 1068 if (bp->bio_cmd == BIO_READ && 1069 bp->bio_error == 0 && 1070 (mask & (1U << 31)) != 0) { 1071 G_RAID_LOGREQ(3, bp, "Recovered data from other drive"); 1072 1073 /* Restore what we were doing. */ 1074 P2V(vol, sd->sd_pos, bp->bio_offset, &virtual, ©); 1075 V2P(vol, virtual, &disk, &offset, &start); 1076 1077 /* Find best disk to write. */ 1078 best = g_raid_tr_raid1e_select_read_disk(vol, 1079 disk, offset, start, ~mask); 1080 if (best >= 0 && (cbp = g_clone_bio(pbp)) != NULL) { 1081 disk += best; 1082 if (disk >= vol->v_disks_count) { 1083 disk -= vol->v_disks_count; 1084 offset += vol->v_strip_size; 1085 } 1086 cbp->bio_offset = offset + start; 1087 cbp->bio_cmd = BIO_WRITE; 1088 cbp->bio_cflags = G_RAID_BIO_FLAG_REMAP; 1089 cbp->bio_caller2 = (void *)mask; 1090 g_destroy_bio(bp); 1091 G_RAID_LOGREQ(2, cbp, 1092 "Attempting bad sector remap on failing drive."); 1093 g_raid_subdisk_iostart(&vol->v_subdisks[disk], cbp); 1094 return; 1095 } 1096 } 1097 if ((mask & (1U << 31)) != 0) { 1098 /* 1099 * We're done with a recovery, mark the range as unlocked. 1100 * For any write errors, we aggressively fail the disk since 1101 * there was both a READ and a WRITE error at this location. 1102 * Both types of errors generally indicates the drive is on 1103 * the verge of total failure anyway. Better to stop trusting 1104 * it now. However, we need to reset error to 0 in that case 1105 * because we're not failing the original I/O which succeeded. 1106 */ 1107 1108 /* Restore what we were doing. */ 1109 P2V(vol, sd->sd_pos, bp->bio_offset, &virtual, ©); 1110 V2P(vol, virtual, &disk, &offset, &start); 1111 1112 for (copy = 0; copy < N; copy++) { 1113 if ((mask & (1 << copy) ) != 0) 1114 vol->v_subdisks[(disk + copy) % 1115 vol->v_disks_count].sd_recovery--; 1116 } 1117 1118 if (bp->bio_cmd == BIO_WRITE && bp->bio_error) { 1119 G_RAID_LOGREQ(0, bp, "Remap write failed: " 1120 "failing subdisk."); 1121 g_raid_tr_raid1e_fail_disk(sd->sd_softc, sd, sd->sd_disk); 1122 bp->bio_error = 0; 1123 } 1124 G_RAID_LOGREQ(2, bp, "REMAP done %d.", bp->bio_error); 1125 g_raid_unlock_range(sd->sd_volume, virtual, bp->bio_length); 1126 } 1127 if (pbp->bio_cmd != BIO_READ) { 1128 if (pbp->bio_inbed == 1 || pbp->bio_error != 0) 1129 pbp->bio_error = bp->bio_error; 1130 if (pbp->bio_cmd == BIO_WRITE && bp->bio_error != 0) { 1131 G_RAID_LOGREQ(0, bp, "Write failed: failing subdisk."); 1132 g_raid_tr_raid1e_fail_disk(sd->sd_softc, sd, sd->sd_disk); 1133 } 1134 error = pbp->bio_error; 1135 } else 1136 error = bp->bio_error; 1137 g_destroy_bio(bp); 1138 if (pbp->bio_children == pbp->bio_inbed) { 1139 pbp->bio_completed = pbp->bio_length; 1140 g_raid_iodone(pbp, error); 1141 } 1142 } 1143 1144 static int 1145 g_raid_tr_kerneldump_raid1e(struct g_raid_tr_object *tr, void *virtual, 1146 off_t boffset, size_t blength) 1147 { 1148 struct g_raid_volume *vol; 1149 struct g_raid_subdisk *sd; 1150 struct bio_queue_head queue; 1151 char *addr; 1152 off_t offset, start, length, remain; 1153 u_int no, strip_size; 1154 int i, error; 1155 1156 vol = tr->tro_volume; 1157 addr = virtual; 1158 strip_size = vol->v_strip_size; 1159 V2P(vol, boffset, &no, &offset, &start); 1160 remain = blength; 1161 bioq_init(&queue); 1162 while (remain > 0) { 1163 length = MIN(strip_size - start, remain); 1164 for (i = 0; i < N; i++) { 1165 sd = &vol->v_subdisks[no]; 1166 switch (sd->sd_state) { 1167 case G_RAID_SUBDISK_S_ACTIVE: 1168 case G_RAID_SUBDISK_S_STALE: 1169 case G_RAID_SUBDISK_S_RESYNC: 1170 break; 1171 case G_RAID_SUBDISK_S_REBUILD: 1172 if (offset + start >= sd->sd_rebuild_pos) 1173 goto nextdisk; 1174 break; 1175 default: 1176 goto nextdisk; 1177 } 1178 error = g_raid_subdisk_kerneldump(sd, addr, 1179 offset + start, length); 1180 if (error != 0) 1181 return (error); 1182 nextdisk: 1183 if (++no >= vol->v_disks_count) { 1184 no = 0; 1185 offset += strip_size; 1186 } 1187 } 1188 remain -= length; 1189 addr += length; 1190 start = 0; 1191 } 1192 return (0); 1193 } 1194 1195 static int 1196 g_raid_tr_locked_raid1e(struct g_raid_tr_object *tr, void *argp) 1197 { 1198 struct bio *bp; 1199 struct g_raid_subdisk *sd; 1200 1201 bp = (struct bio *)argp; 1202 sd = (struct g_raid_subdisk *)bp->bio_caller1; 1203 g_raid_subdisk_iostart(sd, bp); 1204 1205 return (0); 1206 } 1207 1208 static int 1209 g_raid_tr_idle_raid1e(struct g_raid_tr_object *tr) 1210 { 1211 struct g_raid_tr_raid1e_object *trs; 1212 struct g_raid_volume *vol; 1213 1214 vol = tr->tro_volume; 1215 trs = (struct g_raid_tr_raid1e_object *)tr; 1216 trs->trso_fair_io = g_raid1e_rebuild_fair_io; 1217 trs->trso_recover_slabs = g_raid1e_rebuild_cluster_idle; 1218 /* Compensate short rebuild I/Os. */ 1219 if ((vol->v_disks_count % N) != 0 && 1220 vol->v_strip_size < g_raid1e_rebuild_slab) { 1221 trs->trso_recover_slabs *= g_raid1e_rebuild_slab; 1222 trs->trso_recover_slabs /= vol->v_strip_size; 1223 } 1224 if (trs->trso_type == TR_RAID1E_REBUILD) 1225 g_raid_tr_raid1e_rebuild_some(tr); 1226 return (0); 1227 } 1228 1229 static int 1230 g_raid_tr_free_raid1e(struct g_raid_tr_object *tr) 1231 { 1232 struct g_raid_tr_raid1e_object *trs; 1233 1234 trs = (struct g_raid_tr_raid1e_object *)tr; 1235 1236 if (trs->trso_buffer != NULL) { 1237 free(trs->trso_buffer, M_TR_RAID1E); 1238 trs->trso_buffer = NULL; 1239 } 1240 return (0); 1241 } 1242 1243 G_RAID_TR_DECLARE(raid1e, "RAID1E"); 1244