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sys/geom/raid/g_raid.c
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1 /*- 2 * Copyright (c) 2010 Alexander Motin <mav@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD: releng/9.1/sys/geom/raid/g_raid.c 240558 2012-09-16 11:02:22Z mav $"); 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/kernel.h> 33 #include <sys/module.h> 34 #include <sys/limits.h> 35 #include <sys/lock.h> 36 #include <sys/mutex.h> 37 #include <sys/bio.h> 38 #include <sys/sbuf.h> 39 #include <sys/sysctl.h> 40 #include <sys/malloc.h> 41 #include <sys/eventhandler.h> 42 #include <vm/uma.h> 43 #include <geom/geom.h> 44 #include <sys/proc.h> 45 #include <sys/kthread.h> 46 #include <sys/sched.h> 47 #include <geom/raid/g_raid.h> 48 #include "g_raid_md_if.h" 49 #include "g_raid_tr_if.h" 50 51 static MALLOC_DEFINE(M_RAID, "raid_data", "GEOM_RAID Data"); 52 53 SYSCTL_DECL(_kern_geom); 54 SYSCTL_NODE(_kern_geom, OID_AUTO, raid, CTLFLAG_RW, 0, "GEOM_RAID stuff"); 55 int g_raid_enable = 1; 56 TUNABLE_INT("kern.geom.raid.enable", &g_raid_enable); 57 SYSCTL_INT(_kern_geom_raid, OID_AUTO, enable, CTLFLAG_RW, 58 &g_raid_enable, 0, "Enable on-disk metadata taste"); 59 u_int g_raid_aggressive_spare = 0; 60 TUNABLE_INT("kern.geom.raid.aggressive_spare", &g_raid_aggressive_spare); 61 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, aggressive_spare, CTLFLAG_RW, 62 &g_raid_aggressive_spare, 0, "Use disks without metadata as spare"); 63 u_int g_raid_debug = 0; 64 TUNABLE_INT("kern.geom.raid.debug", &g_raid_debug); 65 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, debug, CTLFLAG_RW, &g_raid_debug, 0, 66 "Debug level"); 67 int g_raid_read_err_thresh = 10; 68 TUNABLE_INT("kern.geom.raid.read_err_thresh", &g_raid_read_err_thresh); 69 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, read_err_thresh, CTLFLAG_RW, 70 &g_raid_read_err_thresh, 0, 71 "Number of read errors equated to disk failure"); 72 u_int g_raid_start_timeout = 30; 73 TUNABLE_INT("kern.geom.raid.start_timeout", &g_raid_start_timeout); 74 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, start_timeout, CTLFLAG_RW, 75 &g_raid_start_timeout, 0, 76 "Time to wait for all array components"); 77 static u_int g_raid_clean_time = 5; 78 TUNABLE_INT("kern.geom.raid.clean_time", &g_raid_clean_time); 79 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, clean_time, CTLFLAG_RW, 80 &g_raid_clean_time, 0, "Mark volume as clean when idling"); 81 static u_int g_raid_disconnect_on_failure = 1; 82 TUNABLE_INT("kern.geom.raid.disconnect_on_failure", 83 &g_raid_disconnect_on_failure); 84 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, disconnect_on_failure, CTLFLAG_RW, 85 &g_raid_disconnect_on_failure, 0, "Disconnect component on I/O failure."); 86 static u_int g_raid_name_format = 0; 87 TUNABLE_INT("kern.geom.raid.name_format", &g_raid_name_format); 88 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, name_format, CTLFLAG_RW, 89 &g_raid_name_format, 0, "Providers name format."); 90 static u_int g_raid_idle_threshold = 1000000; 91 TUNABLE_INT("kern.geom.raid.idle_threshold", &g_raid_idle_threshold); 92 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, idle_threshold, CTLFLAG_RW, 93 &g_raid_idle_threshold, 1000000, 94 "Time in microseconds to consider a volume idle."); 95 96 #define MSLEEP(rv, ident, mtx, priority, wmesg, timeout) do { \ 97 G_RAID_DEBUG(4, "%s: Sleeping %p.", __func__, (ident)); \ 98 rv = msleep((ident), (mtx), (priority), (wmesg), (timeout)); \ 99 G_RAID_DEBUG(4, "%s: Woken up %p.", __func__, (ident)); \ 100 } while (0) 101 102 LIST_HEAD(, g_raid_md_class) g_raid_md_classes = 103 LIST_HEAD_INITIALIZER(g_raid_md_classes); 104 105 LIST_HEAD(, g_raid_tr_class) g_raid_tr_classes = 106 LIST_HEAD_INITIALIZER(g_raid_tr_classes); 107 108 LIST_HEAD(, g_raid_volume) g_raid_volumes = 109 LIST_HEAD_INITIALIZER(g_raid_volumes); 110 111 static eventhandler_tag g_raid_pre_sync = NULL; 112 static int g_raid_started = 0; 113 114 static int g_raid_destroy_geom(struct gctl_req *req, struct g_class *mp, 115 struct g_geom *gp); 116 static g_taste_t g_raid_taste; 117 static void g_raid_init(struct g_class *mp); 118 static void g_raid_fini(struct g_class *mp); 119 120 struct g_class g_raid_class = { 121 .name = G_RAID_CLASS_NAME, 122 .version = G_VERSION, 123 .ctlreq = g_raid_ctl, 124 .taste = g_raid_taste, 125 .destroy_geom = g_raid_destroy_geom, 126 .init = g_raid_init, 127 .fini = g_raid_fini 128 }; 129 130 static void g_raid_destroy_provider(struct g_raid_volume *vol); 131 static int g_raid_update_disk(struct g_raid_disk *disk, u_int event); 132 static int g_raid_update_subdisk(struct g_raid_subdisk *subdisk, u_int event); 133 static int g_raid_update_volume(struct g_raid_volume *vol, u_int event); 134 static int g_raid_update_node(struct g_raid_softc *sc, u_int event); 135 static void g_raid_dumpconf(struct sbuf *sb, const char *indent, 136 struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp); 137 static void g_raid_start(struct bio *bp); 138 static void g_raid_start_request(struct bio *bp); 139 static void g_raid_disk_done(struct bio *bp); 140 static void g_raid_poll(struct g_raid_softc *sc); 141 142 static const char * 143 g_raid_node_event2str(int event) 144 { 145 146 switch (event) { 147 case G_RAID_NODE_E_WAKE: 148 return ("WAKE"); 149 case G_RAID_NODE_E_START: 150 return ("START"); 151 default: 152 return ("INVALID"); 153 } 154 } 155 156 const char * 157 g_raid_disk_state2str(int state) 158 { 159 160 switch (state) { 161 case G_RAID_DISK_S_NONE: 162 return ("NONE"); 163 case G_RAID_DISK_S_OFFLINE: 164 return ("OFFLINE"); 165 case G_RAID_DISK_S_FAILED: 166 return ("FAILED"); 167 case G_RAID_DISK_S_STALE_FAILED: 168 return ("STALE_FAILED"); 169 case G_RAID_DISK_S_SPARE: 170 return ("SPARE"); 171 case G_RAID_DISK_S_STALE: 172 return ("STALE"); 173 case G_RAID_DISK_S_ACTIVE: 174 return ("ACTIVE"); 175 default: 176 return ("INVALID"); 177 } 178 } 179 180 static const char * 181 g_raid_disk_event2str(int event) 182 { 183 184 switch (event) { 185 case G_RAID_DISK_E_DISCONNECTED: 186 return ("DISCONNECTED"); 187 default: 188 return ("INVALID"); 189 } 190 } 191 192 const char * 193 g_raid_subdisk_state2str(int state) 194 { 195 196 switch (state) { 197 case G_RAID_SUBDISK_S_NONE: 198 return ("NONE"); 199 case G_RAID_SUBDISK_S_FAILED: 200 return ("FAILED"); 201 case G_RAID_SUBDISK_S_NEW: 202 return ("NEW"); 203 case G_RAID_SUBDISK_S_REBUILD: 204 return ("REBUILD"); 205 case G_RAID_SUBDISK_S_UNINITIALIZED: 206 return ("UNINITIALIZED"); 207 case G_RAID_SUBDISK_S_STALE: 208 return ("STALE"); 209 case G_RAID_SUBDISK_S_RESYNC: 210 return ("RESYNC"); 211 case G_RAID_SUBDISK_S_ACTIVE: 212 return ("ACTIVE"); 213 default: 214 return ("INVALID"); 215 } 216 } 217 218 static const char * 219 g_raid_subdisk_event2str(int event) 220 { 221 222 switch (event) { 223 case G_RAID_SUBDISK_E_NEW: 224 return ("NEW"); 225 case G_RAID_SUBDISK_E_DISCONNECTED: 226 return ("DISCONNECTED"); 227 default: 228 return ("INVALID"); 229 } 230 } 231 232 const char * 233 g_raid_volume_state2str(int state) 234 { 235 236 switch (state) { 237 case G_RAID_VOLUME_S_STARTING: 238 return ("STARTING"); 239 case G_RAID_VOLUME_S_BROKEN: 240 return ("BROKEN"); 241 case G_RAID_VOLUME_S_DEGRADED: 242 return ("DEGRADED"); 243 case G_RAID_VOLUME_S_SUBOPTIMAL: 244 return ("SUBOPTIMAL"); 245 case G_RAID_VOLUME_S_OPTIMAL: 246 return ("OPTIMAL"); 247 case G_RAID_VOLUME_S_UNSUPPORTED: 248 return ("UNSUPPORTED"); 249 case G_RAID_VOLUME_S_STOPPED: 250 return ("STOPPED"); 251 default: 252 return ("INVALID"); 253 } 254 } 255 256 static const char * 257 g_raid_volume_event2str(int event) 258 { 259 260 switch (event) { 261 case G_RAID_VOLUME_E_UP: 262 return ("UP"); 263 case G_RAID_VOLUME_E_DOWN: 264 return ("DOWN"); 265 case G_RAID_VOLUME_E_START: 266 return ("START"); 267 case G_RAID_VOLUME_E_STARTMD: 268 return ("STARTMD"); 269 default: 270 return ("INVALID"); 271 } 272 } 273 274 const char * 275 g_raid_volume_level2str(int level, int qual) 276 { 277 278 switch (level) { 279 case G_RAID_VOLUME_RL_RAID0: 280 return ("RAID0"); 281 case G_RAID_VOLUME_RL_RAID1: 282 return ("RAID1"); 283 case G_RAID_VOLUME_RL_RAID3: 284 if (qual == G_RAID_VOLUME_RLQ_R3P0) 285 return ("RAID3-P0"); 286 if (qual == G_RAID_VOLUME_RLQ_R3PN) 287 return ("RAID3-PN"); 288 return ("RAID3"); 289 case G_RAID_VOLUME_RL_RAID4: 290 if (qual == G_RAID_VOLUME_RLQ_R4P0) 291 return ("RAID4-P0"); 292 if (qual == G_RAID_VOLUME_RLQ_R4PN) 293 return ("RAID4-PN"); 294 return ("RAID4"); 295 case G_RAID_VOLUME_RL_RAID5: 296 if (qual == G_RAID_VOLUME_RLQ_R5RA) 297 return ("RAID5-RA"); 298 if (qual == G_RAID_VOLUME_RLQ_R5RS) 299 return ("RAID5-RS"); 300 if (qual == G_RAID_VOLUME_RLQ_R5LA) 301 return ("RAID5-LA"); 302 if (qual == G_RAID_VOLUME_RLQ_R5LS) 303 return ("RAID5-LS"); 304 return ("RAID5"); 305 case G_RAID_VOLUME_RL_RAID6: 306 if (qual == G_RAID_VOLUME_RLQ_R6RA) 307 return ("RAID6-RA"); 308 if (qual == G_RAID_VOLUME_RLQ_R6RS) 309 return ("RAID6-RS"); 310 if (qual == G_RAID_VOLUME_RLQ_R6LA) 311 return ("RAID6-LA"); 312 if (qual == G_RAID_VOLUME_RLQ_R6LS) 313 return ("RAID6-LS"); 314 return ("RAID6"); 315 case G_RAID_VOLUME_RL_RAIDMDF: 316 if (qual == G_RAID_VOLUME_RLQ_RMDFRA) 317 return ("RAIDMDF-RA"); 318 if (qual == G_RAID_VOLUME_RLQ_RMDFRS) 319 return ("RAIDMDF-RS"); 320 if (qual == G_RAID_VOLUME_RLQ_RMDFLA) 321 return ("RAIDMDF-LA"); 322 if (qual == G_RAID_VOLUME_RLQ_RMDFLS) 323 return ("RAIDMDF-LS"); 324 return ("RAIDMDF"); 325 case G_RAID_VOLUME_RL_RAID1E: 326 if (qual == G_RAID_VOLUME_RLQ_R1EA) 327 return ("RAID1E-A"); 328 if (qual == G_RAID_VOLUME_RLQ_R1EO) 329 return ("RAID1E-O"); 330 return ("RAID1E"); 331 case G_RAID_VOLUME_RL_SINGLE: 332 return ("SINGLE"); 333 case G_RAID_VOLUME_RL_CONCAT: 334 return ("CONCAT"); 335 case G_RAID_VOLUME_RL_RAID5E: 336 if (qual == G_RAID_VOLUME_RLQ_R5ERA) 337 return ("RAID5E-RA"); 338 if (qual == G_RAID_VOLUME_RLQ_R5ERS) 339 return ("RAID5E-RS"); 340 if (qual == G_RAID_VOLUME_RLQ_R5ELA) 341 return ("RAID5E-LA"); 342 if (qual == G_RAID_VOLUME_RLQ_R5ELS) 343 return ("RAID5E-LS"); 344 return ("RAID5E"); 345 case G_RAID_VOLUME_RL_RAID5EE: 346 if (qual == G_RAID_VOLUME_RLQ_R5EERA) 347 return ("RAID5EE-RA"); 348 if (qual == G_RAID_VOLUME_RLQ_R5EERS) 349 return ("RAID5EE-RS"); 350 if (qual == G_RAID_VOLUME_RLQ_R5EELA) 351 return ("RAID5EE-LA"); 352 if (qual == G_RAID_VOLUME_RLQ_R5EELS) 353 return ("RAID5EE-LS"); 354 return ("RAID5EE"); 355 case G_RAID_VOLUME_RL_RAID5R: 356 if (qual == G_RAID_VOLUME_RLQ_R5RRA) 357 return ("RAID5R-RA"); 358 if (qual == G_RAID_VOLUME_RLQ_R5RRS) 359 return ("RAID5R-RS"); 360 if (qual == G_RAID_VOLUME_RLQ_R5RLA) 361 return ("RAID5R-LA"); 362 if (qual == G_RAID_VOLUME_RLQ_R5RLS) 363 return ("RAID5R-LS"); 364 return ("RAID5E"); 365 default: 366 return ("UNKNOWN"); 367 } 368 } 369 370 int 371 g_raid_volume_str2level(const char *str, int *level, int *qual) 372 { 373 374 *level = G_RAID_VOLUME_RL_UNKNOWN; 375 *qual = G_RAID_VOLUME_RLQ_NONE; 376 if (strcasecmp(str, "RAID0") == 0) 377 *level = G_RAID_VOLUME_RL_RAID0; 378 else if (strcasecmp(str, "RAID1") == 0) 379 *level = G_RAID_VOLUME_RL_RAID1; 380 else if (strcasecmp(str, "RAID3-P0") == 0) { 381 *level = G_RAID_VOLUME_RL_RAID3; 382 *qual = G_RAID_VOLUME_RLQ_R3P0; 383 } else if (strcasecmp(str, "RAID3-PN") == 0 || 384 strcasecmp(str, "RAID3") == 0) { 385 *level = G_RAID_VOLUME_RL_RAID3; 386 *qual = G_RAID_VOLUME_RLQ_R3PN; 387 } else if (strcasecmp(str, "RAID4-P0") == 0) { 388 *level = G_RAID_VOLUME_RL_RAID4; 389 *qual = G_RAID_VOLUME_RLQ_R4P0; 390 } else if (strcasecmp(str, "RAID4-PN") == 0 || 391 strcasecmp(str, "RAID4") == 0) { 392 *level = G_RAID_VOLUME_RL_RAID4; 393 *qual = G_RAID_VOLUME_RLQ_R4PN; 394 } else if (strcasecmp(str, "RAID5-RA") == 0) { 395 *level = G_RAID_VOLUME_RL_RAID5; 396 *qual = G_RAID_VOLUME_RLQ_R5RA; 397 } else if (strcasecmp(str, "RAID5-RS") == 0) { 398 *level = G_RAID_VOLUME_RL_RAID5; 399 *qual = G_RAID_VOLUME_RLQ_R5RS; 400 } else if (strcasecmp(str, "RAID5") == 0 || 401 strcasecmp(str, "RAID5-LA") == 0) { 402 *level = G_RAID_VOLUME_RL_RAID5; 403 *qual = G_RAID_VOLUME_RLQ_R5LA; 404 } else if (strcasecmp(str, "RAID5-LS") == 0) { 405 *level = G_RAID_VOLUME_RL_RAID5; 406 *qual = G_RAID_VOLUME_RLQ_R5LS; 407 } else if (strcasecmp(str, "RAID6-RA") == 0) { 408 *level = G_RAID_VOLUME_RL_RAID6; 409 *qual = G_RAID_VOLUME_RLQ_R6RA; 410 } else if (strcasecmp(str, "RAID6-RS") == 0) { 411 *level = G_RAID_VOLUME_RL_RAID6; 412 *qual = G_RAID_VOLUME_RLQ_R6RS; 413 } else if (strcasecmp(str, "RAID6") == 0 || 414 strcasecmp(str, "RAID6-LA") == 0) { 415 *level = G_RAID_VOLUME_RL_RAID6; 416 *qual = G_RAID_VOLUME_RLQ_R6LA; 417 } else if (strcasecmp(str, "RAID6-LS") == 0) { 418 *level = G_RAID_VOLUME_RL_RAID6; 419 *qual = G_RAID_VOLUME_RLQ_R6LS; 420 } else if (strcasecmp(str, "RAIDMDF-RA") == 0) { 421 *level = G_RAID_VOLUME_RL_RAIDMDF; 422 *qual = G_RAID_VOLUME_RLQ_RMDFRA; 423 } else if (strcasecmp(str, "RAIDMDF-RS") == 0) { 424 *level = G_RAID_VOLUME_RL_RAIDMDF; 425 *qual = G_RAID_VOLUME_RLQ_RMDFRS; 426 } else if (strcasecmp(str, "RAIDMDF") == 0 || 427 strcasecmp(str, "RAIDMDF-LA") == 0) { 428 *level = G_RAID_VOLUME_RL_RAIDMDF; 429 *qual = G_RAID_VOLUME_RLQ_RMDFLA; 430 } else if (strcasecmp(str, "RAIDMDF-LS") == 0) { 431 *level = G_RAID_VOLUME_RL_RAIDMDF; 432 *qual = G_RAID_VOLUME_RLQ_RMDFLS; 433 } else if (strcasecmp(str, "RAID10") == 0 || 434 strcasecmp(str, "RAID1E") == 0 || 435 strcasecmp(str, "RAID1E-A") == 0) { 436 *level = G_RAID_VOLUME_RL_RAID1E; 437 *qual = G_RAID_VOLUME_RLQ_R1EA; 438 } else if (strcasecmp(str, "RAID1E-O") == 0) { 439 *level = G_RAID_VOLUME_RL_RAID1E; 440 *qual = G_RAID_VOLUME_RLQ_R1EO; 441 } else if (strcasecmp(str, "SINGLE") == 0) 442 *level = G_RAID_VOLUME_RL_SINGLE; 443 else if (strcasecmp(str, "CONCAT") == 0) 444 *level = G_RAID_VOLUME_RL_CONCAT; 445 else if (strcasecmp(str, "RAID5E-RA") == 0) { 446 *level = G_RAID_VOLUME_RL_RAID5E; 447 *qual = G_RAID_VOLUME_RLQ_R5ERA; 448 } else if (strcasecmp(str, "RAID5E-RS") == 0) { 449 *level = G_RAID_VOLUME_RL_RAID5E; 450 *qual = G_RAID_VOLUME_RLQ_R5ERS; 451 } else if (strcasecmp(str, "RAID5E") == 0 || 452 strcasecmp(str, "RAID5E-LA") == 0) { 453 *level = G_RAID_VOLUME_RL_RAID5E; 454 *qual = G_RAID_VOLUME_RLQ_R5ELA; 455 } else if (strcasecmp(str, "RAID5E-LS") == 0) { 456 *level = G_RAID_VOLUME_RL_RAID5E; 457 *qual = G_RAID_VOLUME_RLQ_R5ELS; 458 } else if (strcasecmp(str, "RAID5EE-RA") == 0) { 459 *level = G_RAID_VOLUME_RL_RAID5EE; 460 *qual = G_RAID_VOLUME_RLQ_R5EERA; 461 } else if (strcasecmp(str, "RAID5EE-RS") == 0) { 462 *level = G_RAID_VOLUME_RL_RAID5EE; 463 *qual = G_RAID_VOLUME_RLQ_R5EERS; 464 } else if (strcasecmp(str, "RAID5EE") == 0 || 465 strcasecmp(str, "RAID5EE-LA") == 0) { 466 *level = G_RAID_VOLUME_RL_RAID5EE; 467 *qual = G_RAID_VOLUME_RLQ_R5EELA; 468 } else if (strcasecmp(str, "RAID5EE-LS") == 0) { 469 *level = G_RAID_VOLUME_RL_RAID5EE; 470 *qual = G_RAID_VOLUME_RLQ_R5EELS; 471 } else if (strcasecmp(str, "RAID5R-RA") == 0) { 472 *level = G_RAID_VOLUME_RL_RAID5R; 473 *qual = G_RAID_VOLUME_RLQ_R5RRA; 474 } else if (strcasecmp(str, "RAID5R-RS") == 0) { 475 *level = G_RAID_VOLUME_RL_RAID5R; 476 *qual = G_RAID_VOLUME_RLQ_R5RRS; 477 } else if (strcasecmp(str, "RAID5R") == 0 || 478 strcasecmp(str, "RAID5R-LA") == 0) { 479 *level = G_RAID_VOLUME_RL_RAID5R; 480 *qual = G_RAID_VOLUME_RLQ_R5RLA; 481 } else if (strcasecmp(str, "RAID5R-LS") == 0) { 482 *level = G_RAID_VOLUME_RL_RAID5R; 483 *qual = G_RAID_VOLUME_RLQ_R5RLS; 484 } else 485 return (-1); 486 return (0); 487 } 488 489 const char * 490 g_raid_get_diskname(struct g_raid_disk *disk) 491 { 492 493 if (disk->d_consumer == NULL || disk->d_consumer->provider == NULL) 494 return ("[unknown]"); 495 return (disk->d_consumer->provider->name); 496 } 497 498 void 499 g_raid_report_disk_state(struct g_raid_disk *disk) 500 { 501 struct g_raid_subdisk *sd; 502 int len, state; 503 uint32_t s; 504 505 if (disk->d_consumer == NULL) 506 return; 507 if (disk->d_state == G_RAID_DISK_S_FAILED || 508 disk->d_state == G_RAID_DISK_S_STALE_FAILED) { 509 s = G_STATE_FAILED; 510 } else { 511 state = G_RAID_SUBDISK_S_ACTIVE; 512 TAILQ_FOREACH(sd, &disk->d_subdisks, sd_next) { 513 if (sd->sd_state < state) 514 state = sd->sd_state; 515 } 516 if (state == G_RAID_SUBDISK_S_FAILED) 517 s = G_STATE_FAILED; 518 else if (state == G_RAID_SUBDISK_S_NEW || 519 state == G_RAID_SUBDISK_S_REBUILD) 520 s = G_STATE_REBUILD; 521 else if (state == G_RAID_SUBDISK_S_STALE || 522 state == G_RAID_SUBDISK_S_RESYNC) 523 s = G_STATE_RESYNC; 524 else 525 s = G_STATE_ACTIVE; 526 } 527 len = sizeof(s); 528 g_io_getattr("GEOM::setstate", disk->d_consumer, &len, &s); 529 G_RAID_DEBUG1(2, disk->d_softc, "Disk %s state reported as %d.", 530 g_raid_get_diskname(disk), s); 531 } 532 533 void 534 g_raid_change_disk_state(struct g_raid_disk *disk, int state) 535 { 536 537 G_RAID_DEBUG1(0, disk->d_softc, "Disk %s state changed from %s to %s.", 538 g_raid_get_diskname(disk), 539 g_raid_disk_state2str(disk->d_state), 540 g_raid_disk_state2str(state)); 541 disk->d_state = state; 542 g_raid_report_disk_state(disk); 543 } 544 545 void 546 g_raid_change_subdisk_state(struct g_raid_subdisk *sd, int state) 547 { 548 549 G_RAID_DEBUG1(0, sd->sd_softc, 550 "Subdisk %s:%d-%s state changed from %s to %s.", 551 sd->sd_volume->v_name, sd->sd_pos, 552 sd->sd_disk ? g_raid_get_diskname(sd->sd_disk) : "[none]", 553 g_raid_subdisk_state2str(sd->sd_state), 554 g_raid_subdisk_state2str(state)); 555 sd->sd_state = state; 556 if (sd->sd_disk) 557 g_raid_report_disk_state(sd->sd_disk); 558 } 559 560 void 561 g_raid_change_volume_state(struct g_raid_volume *vol, int state) 562 { 563 564 G_RAID_DEBUG1(0, vol->v_softc, 565 "Volume %s state changed from %s to %s.", 566 vol->v_name, 567 g_raid_volume_state2str(vol->v_state), 568 g_raid_volume_state2str(state)); 569 vol->v_state = state; 570 } 571 572 /* 573 * --- Events handling functions --- 574 * Events in geom_raid are used to maintain subdisks and volumes status 575 * from one thread to simplify locking. 576 */ 577 static void 578 g_raid_event_free(struct g_raid_event *ep) 579 { 580 581 free(ep, M_RAID); 582 } 583 584 int 585 g_raid_event_send(void *arg, int event, int flags) 586 { 587 struct g_raid_softc *sc; 588 struct g_raid_event *ep; 589 int error; 590 591 if ((flags & G_RAID_EVENT_VOLUME) != 0) { 592 sc = ((struct g_raid_volume *)arg)->v_softc; 593 } else if ((flags & G_RAID_EVENT_DISK) != 0) { 594 sc = ((struct g_raid_disk *)arg)->d_softc; 595 } else if ((flags & G_RAID_EVENT_SUBDISK) != 0) { 596 sc = ((struct g_raid_subdisk *)arg)->sd_softc; 597 } else { 598 sc = arg; 599 } 600 ep = malloc(sizeof(*ep), M_RAID, 601 sx_xlocked(&sc->sc_lock) ? M_WAITOK : M_NOWAIT); 602 if (ep == NULL) 603 return (ENOMEM); 604 ep->e_tgt = arg; 605 ep->e_event = event; 606 ep->e_flags = flags; 607 ep->e_error = 0; 608 G_RAID_DEBUG1(4, sc, "Sending event %p. Waking up %p.", ep, sc); 609 mtx_lock(&sc->sc_queue_mtx); 610 TAILQ_INSERT_TAIL(&sc->sc_events, ep, e_next); 611 mtx_unlock(&sc->sc_queue_mtx); 612 wakeup(sc); 613 614 if ((flags & G_RAID_EVENT_WAIT) == 0) 615 return (0); 616 617 sx_assert(&sc->sc_lock, SX_XLOCKED); 618 G_RAID_DEBUG1(4, sc, "Sleeping on %p.", ep); 619 sx_xunlock(&sc->sc_lock); 620 while ((ep->e_flags & G_RAID_EVENT_DONE) == 0) { 621 mtx_lock(&sc->sc_queue_mtx); 622 MSLEEP(error, ep, &sc->sc_queue_mtx, PRIBIO | PDROP, "m:event", 623 hz * 5); 624 } 625 error = ep->e_error; 626 g_raid_event_free(ep); 627 sx_xlock(&sc->sc_lock); 628 return (error); 629 } 630 631 static void 632 g_raid_event_cancel(struct g_raid_softc *sc, void *tgt) 633 { 634 struct g_raid_event *ep, *tmpep; 635 636 sx_assert(&sc->sc_lock, SX_XLOCKED); 637 638 mtx_lock(&sc->sc_queue_mtx); 639 TAILQ_FOREACH_SAFE(ep, &sc->sc_events, e_next, tmpep) { 640 if (ep->e_tgt != tgt) 641 continue; 642 TAILQ_REMOVE(&sc->sc_events, ep, e_next); 643 if ((ep->e_flags & G_RAID_EVENT_WAIT) == 0) 644 g_raid_event_free(ep); 645 else { 646 ep->e_error = ECANCELED; 647 wakeup(ep); 648 } 649 } 650 mtx_unlock(&sc->sc_queue_mtx); 651 } 652 653 static int 654 g_raid_event_check(struct g_raid_softc *sc, void *tgt) 655 { 656 struct g_raid_event *ep; 657 int res = 0; 658 659 sx_assert(&sc->sc_lock, SX_XLOCKED); 660 661 mtx_lock(&sc->sc_queue_mtx); 662 TAILQ_FOREACH(ep, &sc->sc_events, e_next) { 663 if (ep->e_tgt != tgt) 664 continue; 665 res = 1; 666 break; 667 } 668 mtx_unlock(&sc->sc_queue_mtx); 669 return (res); 670 } 671 672 /* 673 * Return the number of disks in given state. 674 * If state is equal to -1, count all connected disks. 675 */ 676 u_int 677 g_raid_ndisks(struct g_raid_softc *sc, int state) 678 { 679 struct g_raid_disk *disk; 680 u_int n; 681 682 sx_assert(&sc->sc_lock, SX_LOCKED); 683 684 n = 0; 685 TAILQ_FOREACH(disk, &sc->sc_disks, d_next) { 686 if (disk->d_state == state || state == -1) 687 n++; 688 } 689 return (n); 690 } 691 692 /* 693 * Return the number of subdisks in given state. 694 * If state is equal to -1, count all connected disks. 695 */ 696 u_int 697 g_raid_nsubdisks(struct g_raid_volume *vol, int state) 698 { 699 struct g_raid_subdisk *subdisk; 700 struct g_raid_softc *sc; 701 u_int i, n ; 702 703 sc = vol->v_softc; 704 sx_assert(&sc->sc_lock, SX_LOCKED); 705 706 n = 0; 707 for (i = 0; i < vol->v_disks_count; i++) { 708 subdisk = &vol->v_subdisks[i]; 709 if ((state == -1 && 710 subdisk->sd_state != G_RAID_SUBDISK_S_NONE) || 711 subdisk->sd_state == state) 712 n++; 713 } 714 return (n); 715 } 716 717 /* 718 * Return the first subdisk in given state. 719 * If state is equal to -1, then the first connected disks. 720 */ 721 struct g_raid_subdisk * 722 g_raid_get_subdisk(struct g_raid_volume *vol, int state) 723 { 724 struct g_raid_subdisk *sd; 725 struct g_raid_softc *sc; 726 u_int i; 727 728 sc = vol->v_softc; 729 sx_assert(&sc->sc_lock, SX_LOCKED); 730 731 for (i = 0; i < vol->v_disks_count; i++) { 732 sd = &vol->v_subdisks[i]; 733 if ((state == -1 && 734 sd->sd_state != G_RAID_SUBDISK_S_NONE) || 735 sd->sd_state == state) 736 return (sd); 737 } 738 return (NULL); 739 } 740 741 struct g_consumer * 742 g_raid_open_consumer(struct g_raid_softc *sc, const char *name) 743 { 744 struct g_consumer *cp; 745 struct g_provider *pp; 746 747 g_topology_assert(); 748 749 if (strncmp(name, "/dev/", 5) == 0) 750 name += 5; 751 pp = g_provider_by_name(name); 752 if (pp == NULL) 753 return (NULL); 754 cp = g_new_consumer(sc->sc_geom); 755 if (g_attach(cp, pp) != 0) { 756 g_destroy_consumer(cp); 757 return (NULL); 758 } 759 if (g_access(cp, 1, 1, 1) != 0) { 760 g_detach(cp); 761 g_destroy_consumer(cp); 762 return (NULL); 763 } 764 return (cp); 765 } 766 767 static u_int 768 g_raid_nrequests(struct g_raid_softc *sc, struct g_consumer *cp) 769 { 770 struct bio *bp; 771 u_int nreqs = 0; 772 773 mtx_lock(&sc->sc_queue_mtx); 774 TAILQ_FOREACH(bp, &sc->sc_queue.queue, bio_queue) { 775 if (bp->bio_from == cp) 776 nreqs++; 777 } 778 mtx_unlock(&sc->sc_queue_mtx); 779 return (nreqs); 780 } 781 782 u_int 783 g_raid_nopens(struct g_raid_softc *sc) 784 { 785 struct g_raid_volume *vol; 786 u_int opens; 787 788 opens = 0; 789 TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) { 790 if (vol->v_provider_open != 0) 791 opens++; 792 } 793 return (opens); 794 } 795 796 static int 797 g_raid_consumer_is_busy(struct g_raid_softc *sc, struct g_consumer *cp) 798 { 799 800 if (cp->index > 0) { 801 G_RAID_DEBUG1(2, sc, 802 "I/O requests for %s exist, can't destroy it now.", 803 cp->provider->name); 804 return (1); 805 } 806 if (g_raid_nrequests(sc, cp) > 0) { 807 G_RAID_DEBUG1(2, sc, 808 "I/O requests for %s in queue, can't destroy it now.", 809 cp->provider->name); 810 return (1); 811 } 812 return (0); 813 } 814 815 static void 816 g_raid_destroy_consumer(void *arg, int flags __unused) 817 { 818 struct g_consumer *cp; 819 820 g_topology_assert(); 821 822 cp = arg; 823 G_RAID_DEBUG(1, "Consumer %s destroyed.", cp->provider->name); 824 g_detach(cp); 825 g_destroy_consumer(cp); 826 } 827 828 void 829 g_raid_kill_consumer(struct g_raid_softc *sc, struct g_consumer *cp) 830 { 831 struct g_provider *pp; 832 int retaste_wait; 833 834 g_topology_assert_not(); 835 836 g_topology_lock(); 837 cp->private = NULL; 838 if (g_raid_consumer_is_busy(sc, cp)) 839 goto out; 840 pp = cp->provider; 841 retaste_wait = 0; 842 if (cp->acw == 1) { 843 if ((pp->geom->flags & G_GEOM_WITHER) == 0) 844 retaste_wait = 1; 845 } 846 if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0) 847 g_access(cp, -cp->acr, -cp->acw, -cp->ace); 848 if (retaste_wait) { 849 /* 850 * After retaste event was send (inside g_access()), we can send 851 * event to detach and destroy consumer. 852 * A class, which has consumer to the given provider connected 853 * will not receive retaste event for the provider. 854 * This is the way how I ignore retaste events when I close 855 * consumers opened for write: I detach and destroy consumer 856 * after retaste event is sent. 857 */ 858 g_post_event(g_raid_destroy_consumer, cp, M_WAITOK, NULL); 859 goto out; 860 } 861 G_RAID_DEBUG(1, "Consumer %s destroyed.", pp->name); 862 g_detach(cp); 863 g_destroy_consumer(cp); 864 out: 865 g_topology_unlock(); 866 } 867 868 static void 869 g_raid_orphan(struct g_consumer *cp) 870 { 871 struct g_raid_disk *disk; 872 873 g_topology_assert(); 874 875 disk = cp->private; 876 if (disk == NULL) 877 return; 878 g_raid_event_send(disk, G_RAID_DISK_E_DISCONNECTED, 879 G_RAID_EVENT_DISK); 880 } 881 882 static int 883 g_raid_clean(struct g_raid_volume *vol, int acw) 884 { 885 struct g_raid_softc *sc; 886 int timeout; 887 888 sc = vol->v_softc; 889 g_topology_assert_not(); 890 sx_assert(&sc->sc_lock, SX_XLOCKED); 891 892 // if ((sc->sc_flags & G_RAID_DEVICE_FLAG_NOFAILSYNC) != 0) 893 // return (0); 894 if (!vol->v_dirty) 895 return (0); 896 if (vol->v_writes > 0) 897 return (0); 898 if (acw > 0 || (acw == -1 && 899 vol->v_provider != NULL && vol->v_provider->acw > 0)) { 900 timeout = g_raid_clean_time - (time_uptime - vol->v_last_write); 901 if (timeout > 0) 902 return (timeout); 903 } 904 vol->v_dirty = 0; 905 G_RAID_DEBUG1(1, sc, "Volume %s marked as clean.", 906 vol->v_name); 907 g_raid_write_metadata(sc, vol, NULL, NULL); 908 return (0); 909 } 910 911 static void 912 g_raid_dirty(struct g_raid_volume *vol) 913 { 914 struct g_raid_softc *sc; 915 916 sc = vol->v_softc; 917 g_topology_assert_not(); 918 sx_assert(&sc->sc_lock, SX_XLOCKED); 919 920 // if ((sc->sc_flags & G_RAID_DEVICE_FLAG_NOFAILSYNC) != 0) 921 // return; 922 vol->v_dirty = 1; 923 G_RAID_DEBUG1(1, sc, "Volume %s marked as dirty.", 924 vol->v_name); 925 g_raid_write_metadata(sc, vol, NULL, NULL); 926 } 927 928 void 929 g_raid_tr_flush_common(struct g_raid_tr_object *tr, struct bio *bp) 930 { 931 struct g_raid_softc *sc; 932 struct g_raid_volume *vol; 933 struct g_raid_subdisk *sd; 934 struct bio_queue_head queue; 935 struct bio *cbp; 936 int i; 937 938 vol = tr->tro_volume; 939 sc = vol->v_softc; 940 941 /* 942 * Allocate all bios before sending any request, so we can return 943 * ENOMEM in nice and clean way. 944 */ 945 bioq_init(&queue); 946 for (i = 0; i < vol->v_disks_count; i++) { 947 sd = &vol->v_subdisks[i]; 948 if (sd->sd_state == G_RAID_SUBDISK_S_NONE || 949 sd->sd_state == G_RAID_SUBDISK_S_FAILED) 950 continue; 951 cbp = g_clone_bio(bp); 952 if (cbp == NULL) 953 goto failure; 954 cbp->bio_caller1 = sd; 955 bioq_insert_tail(&queue, cbp); 956 } 957 for (cbp = bioq_first(&queue); cbp != NULL; 958 cbp = bioq_first(&queue)) { 959 bioq_remove(&queue, cbp); 960 sd = cbp->bio_caller1; 961 cbp->bio_caller1 = NULL; 962 g_raid_subdisk_iostart(sd, cbp); 963 } 964 return; 965 failure: 966 for (cbp = bioq_first(&queue); cbp != NULL; 967 cbp = bioq_first(&queue)) { 968 bioq_remove(&queue, cbp); 969 g_destroy_bio(cbp); 970 } 971 if (bp->bio_error == 0) 972 bp->bio_error = ENOMEM; 973 g_raid_iodone(bp, bp->bio_error); 974 } 975 976 static void 977 g_raid_tr_kerneldump_common_done(struct bio *bp) 978 { 979 980 bp->bio_flags |= BIO_DONE; 981 } 982 983 int 984 g_raid_tr_kerneldump_common(struct g_raid_tr_object *tr, 985 void *virtual, vm_offset_t physical, off_t offset, size_t length) 986 { 987 struct g_raid_softc *sc; 988 struct g_raid_volume *vol; 989 struct bio bp; 990 991 vol = tr->tro_volume; 992 sc = vol->v_softc; 993 994 bzero(&bp, sizeof(bp)); 995 bp.bio_cmd = BIO_WRITE; 996 bp.bio_done = g_raid_tr_kerneldump_common_done; 997 bp.bio_attribute = NULL; 998 bp.bio_offset = offset; 999 bp.bio_length = length; 1000 bp.bio_data = virtual; 1001 bp.bio_to = vol->v_provider; 1002 1003 g_raid_start(&bp); 1004 while (!(bp.bio_flags & BIO_DONE)) { 1005 G_RAID_DEBUG1(4, sc, "Poll..."); 1006 g_raid_poll(sc); 1007 DELAY(10); 1008 } 1009 1010 return (bp.bio_error != 0 ? EIO : 0); 1011 } 1012 1013 static int 1014 g_raid_dump(void *arg, 1015 void *virtual, vm_offset_t physical, off_t offset, size_t length) 1016 { 1017 struct g_raid_volume *vol; 1018 int error; 1019 1020 vol = (struct g_raid_volume *)arg; 1021 G_RAID_DEBUG1(3, vol->v_softc, "Dumping at off %llu len %llu.", 1022 (long long unsigned)offset, (long long unsigned)length); 1023 1024 error = G_RAID_TR_KERNELDUMP(vol->v_tr, 1025 virtual, physical, offset, length); 1026 return (error); 1027 } 1028 1029 static void 1030 g_raid_kerneldump(struct g_raid_softc *sc, struct bio *bp) 1031 { 1032 struct g_kerneldump *gkd; 1033 struct g_provider *pp; 1034 struct g_raid_volume *vol; 1035 1036 gkd = (struct g_kerneldump*)bp->bio_data; 1037 pp = bp->bio_to; 1038 vol = pp->private; 1039 g_trace(G_T_TOPOLOGY, "g_raid_kerneldump(%s, %jd, %jd)", 1040 pp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length); 1041 gkd->di.dumper = g_raid_dump; 1042 gkd->di.priv = vol; 1043 gkd->di.blocksize = vol->v_sectorsize; 1044 gkd->di.maxiosize = DFLTPHYS; 1045 gkd->di.mediaoffset = gkd->offset; 1046 if ((gkd->offset + gkd->length) > vol->v_mediasize) 1047 gkd->length = vol->v_mediasize - gkd->offset; 1048 gkd->di.mediasize = gkd->length; 1049 g_io_deliver(bp, 0); 1050 } 1051 1052 static void 1053 g_raid_start(struct bio *bp) 1054 { 1055 struct g_raid_softc *sc; 1056 1057 sc = bp->bio_to->geom->softc; 1058 /* 1059 * If sc == NULL or there are no valid disks, provider's error 1060 * should be set and g_raid_start() should not be called at all. 1061 */ 1062 // KASSERT(sc != NULL && sc->sc_state == G_RAID_VOLUME_S_RUNNING, 1063 // ("Provider's error should be set (error=%d)(mirror=%s).", 1064 // bp->bio_to->error, bp->bio_to->name)); 1065 G_RAID_LOGREQ(3, bp, "Request received."); 1066 1067 switch (bp->bio_cmd) { 1068 case BIO_READ: 1069 case BIO_WRITE: 1070 case BIO_DELETE: 1071 case BIO_FLUSH: 1072 break; 1073 case BIO_GETATTR: 1074 if (!strcmp(bp->bio_attribute, "GEOM::kerneldump")) 1075 g_raid_kerneldump(sc, bp); 1076 else 1077 g_io_deliver(bp, EOPNOTSUPP); 1078 return; 1079 default: 1080 g_io_deliver(bp, EOPNOTSUPP); 1081 return; 1082 } 1083 mtx_lock(&sc->sc_queue_mtx); 1084 bioq_disksort(&sc->sc_queue, bp); 1085 mtx_unlock(&sc->sc_queue_mtx); 1086 if (!dumping) { 1087 G_RAID_DEBUG1(4, sc, "Waking up %p.", sc); 1088 wakeup(sc); 1089 } 1090 } 1091 1092 static int 1093 g_raid_bio_overlaps(const struct bio *bp, off_t lstart, off_t len) 1094 { 1095 /* 1096 * 5 cases: 1097 * (1) bp entirely below NO 1098 * (2) bp entirely above NO 1099 * (3) bp start below, but end in range YES 1100 * (4) bp entirely within YES 1101 * (5) bp starts within, ends above YES 1102 * 1103 * lock range 10-19 (offset 10 length 10) 1104 * (1) 1-5: first if kicks it out 1105 * (2) 30-35: second if kicks it out 1106 * (3) 5-15: passes both ifs 1107 * (4) 12-14: passes both ifs 1108 * (5) 19-20: passes both 1109 */ 1110 off_t lend = lstart + len - 1; 1111 off_t bstart = bp->bio_offset; 1112 off_t bend = bp->bio_offset + bp->bio_length - 1; 1113 1114 if (bend < lstart) 1115 return (0); 1116 if (lend < bstart) 1117 return (0); 1118 return (1); 1119 } 1120 1121 static int 1122 g_raid_is_in_locked_range(struct g_raid_volume *vol, const struct bio *bp) 1123 { 1124 struct g_raid_lock *lp; 1125 1126 sx_assert(&vol->v_softc->sc_lock, SX_LOCKED); 1127 1128 LIST_FOREACH(lp, &vol->v_locks, l_next) { 1129 if (g_raid_bio_overlaps(bp, lp->l_offset, lp->l_length)) 1130 return (1); 1131 } 1132 return (0); 1133 } 1134 1135 static void 1136 g_raid_start_request(struct bio *bp) 1137 { 1138 struct g_raid_softc *sc; 1139 struct g_raid_volume *vol; 1140 1141 sc = bp->bio_to->geom->softc; 1142 sx_assert(&sc->sc_lock, SX_LOCKED); 1143 vol = bp->bio_to->private; 1144 1145 /* 1146 * Check to see if this item is in a locked range. If so, 1147 * queue it to our locked queue and return. We'll requeue 1148 * it when the range is unlocked. Internal I/O for the 1149 * rebuild/rescan/recovery process is excluded from this 1150 * check so we can actually do the recovery. 1151 */ 1152 if (!(bp->bio_cflags & G_RAID_BIO_FLAG_SPECIAL) && 1153 g_raid_is_in_locked_range(vol, bp)) { 1154 G_RAID_LOGREQ(3, bp, "Defer request."); 1155 bioq_insert_tail(&vol->v_locked, bp); 1156 return; 1157 } 1158 1159 /* 1160 * If we're actually going to do the write/delete, then 1161 * update the idle stats for the volume. 1162 */ 1163 if (bp->bio_cmd == BIO_WRITE || bp->bio_cmd == BIO_DELETE) { 1164 if (!vol->v_dirty) 1165 g_raid_dirty(vol); 1166 vol->v_writes++; 1167 } 1168 1169 /* 1170 * Put request onto inflight queue, so we can check if new 1171 * synchronization requests don't collide with it. Then tell 1172 * the transformation layer to start the I/O. 1173 */ 1174 bioq_insert_tail(&vol->v_inflight, bp); 1175 G_RAID_LOGREQ(4, bp, "Request started"); 1176 G_RAID_TR_IOSTART(vol->v_tr, bp); 1177 } 1178 1179 static void 1180 g_raid_finish_with_locked_ranges(struct g_raid_volume *vol, struct bio *bp) 1181 { 1182 off_t off, len; 1183 struct bio *nbp; 1184 struct g_raid_lock *lp; 1185 1186 vol->v_pending_lock = 0; 1187 LIST_FOREACH(lp, &vol->v_locks, l_next) { 1188 if (lp->l_pending) { 1189 off = lp->l_offset; 1190 len = lp->l_length; 1191 lp->l_pending = 0; 1192 TAILQ_FOREACH(nbp, &vol->v_inflight.queue, bio_queue) { 1193 if (g_raid_bio_overlaps(nbp, off, len)) 1194 lp->l_pending++; 1195 } 1196 if (lp->l_pending) { 1197 vol->v_pending_lock = 1; 1198 G_RAID_DEBUG1(4, vol->v_softc, 1199 "Deferred lock(%jd, %jd) has %d pending", 1200 (intmax_t)off, (intmax_t)(off + len), 1201 lp->l_pending); 1202 continue; 1203 } 1204 G_RAID_DEBUG1(4, vol->v_softc, 1205 "Deferred lock of %jd to %jd completed", 1206 (intmax_t)off, (intmax_t)(off + len)); 1207 G_RAID_TR_LOCKED(vol->v_tr, lp->l_callback_arg); 1208 } 1209 } 1210 } 1211 1212 void 1213 g_raid_iodone(struct bio *bp, int error) 1214 { 1215 struct g_raid_softc *sc; 1216 struct g_raid_volume *vol; 1217 1218 sc = bp->bio_to->geom->softc; 1219 sx_assert(&sc->sc_lock, SX_LOCKED); 1220 vol = bp->bio_to->private; 1221 G_RAID_LOGREQ(3, bp, "Request done: %d.", error); 1222 1223 /* Update stats if we done write/delete. */ 1224 if (bp->bio_cmd == BIO_WRITE || bp->bio_cmd == BIO_DELETE) { 1225 vol->v_writes--; 1226 vol->v_last_write = time_uptime; 1227 } 1228 1229 bioq_remove(&vol->v_inflight, bp); 1230 if (vol->v_pending_lock && g_raid_is_in_locked_range(vol, bp)) 1231 g_raid_finish_with_locked_ranges(vol, bp); 1232 getmicrouptime(&vol->v_last_done); 1233 g_io_deliver(bp, error); 1234 } 1235 1236 int 1237 g_raid_lock_range(struct g_raid_volume *vol, off_t off, off_t len, 1238 struct bio *ignore, void *argp) 1239 { 1240 struct g_raid_softc *sc; 1241 struct g_raid_lock *lp; 1242 struct bio *bp; 1243 1244 sc = vol->v_softc; 1245 lp = malloc(sizeof(*lp), M_RAID, M_WAITOK | M_ZERO); 1246 LIST_INSERT_HEAD(&vol->v_locks, lp, l_next); 1247 lp->l_offset = off; 1248 lp->l_length = len; 1249 lp->l_callback_arg = argp; 1250 1251 lp->l_pending = 0; 1252 TAILQ_FOREACH(bp, &vol->v_inflight.queue, bio_queue) { 1253 if (bp != ignore && g_raid_bio_overlaps(bp, off, len)) 1254 lp->l_pending++; 1255 } 1256 1257 /* 1258 * If there are any writes that are pending, we return EBUSY. All 1259 * callers will have to wait until all pending writes clear. 1260 */ 1261 if (lp->l_pending > 0) { 1262 vol->v_pending_lock = 1; 1263 G_RAID_DEBUG1(4, sc, "Locking range %jd to %jd deferred %d pend", 1264 (intmax_t)off, (intmax_t)(off+len), lp->l_pending); 1265 return (EBUSY); 1266 } 1267 G_RAID_DEBUG1(4, sc, "Locking range %jd to %jd", 1268 (intmax_t)off, (intmax_t)(off+len)); 1269 G_RAID_TR_LOCKED(vol->v_tr, lp->l_callback_arg); 1270 return (0); 1271 } 1272 1273 int 1274 g_raid_unlock_range(struct g_raid_volume *vol, off_t off, off_t len) 1275 { 1276 struct g_raid_lock *lp; 1277 struct g_raid_softc *sc; 1278 struct bio *bp; 1279 1280 sc = vol->v_softc; 1281 LIST_FOREACH(lp, &vol->v_locks, l_next) { 1282 if (lp->l_offset == off && lp->l_length == len) { 1283 LIST_REMOVE(lp, l_next); 1284 /* XXX 1285 * Right now we just put them all back on the queue 1286 * and hope for the best. We hope this because any 1287 * locked ranges will go right back on this list 1288 * when the worker thread runs. 1289 * XXX 1290 */ 1291 G_RAID_DEBUG1(4, sc, "Unlocked %jd to %jd", 1292 (intmax_t)lp->l_offset, 1293 (intmax_t)(lp->l_offset+lp->l_length)); 1294 mtx_lock(&sc->sc_queue_mtx); 1295 while ((bp = bioq_takefirst(&vol->v_locked)) != NULL) 1296 bioq_disksort(&sc->sc_queue, bp); 1297 mtx_unlock(&sc->sc_queue_mtx); 1298 free(lp, M_RAID); 1299 return (0); 1300 } 1301 } 1302 return (EINVAL); 1303 } 1304 1305 void 1306 g_raid_subdisk_iostart(struct g_raid_subdisk *sd, struct bio *bp) 1307 { 1308 struct g_consumer *cp; 1309 struct g_raid_disk *disk, *tdisk; 1310 1311 bp->bio_caller1 = sd; 1312 1313 /* 1314 * Make sure that the disk is present. Generally it is a task of 1315 * transformation layers to not send requests to absent disks, but 1316 * it is better to be safe and report situation then sorry. 1317 */ 1318 if (sd->sd_disk == NULL) { 1319 G_RAID_LOGREQ(0, bp, "Warning! I/O request to an absent disk!"); 1320 nodisk: 1321 bp->bio_from = NULL; 1322 bp->bio_to = NULL; 1323 bp->bio_error = ENXIO; 1324 g_raid_disk_done(bp); 1325 return; 1326 } 1327 disk = sd->sd_disk; 1328 if (disk->d_state != G_RAID_DISK_S_ACTIVE && 1329 disk->d_state != G_RAID_DISK_S_FAILED) { 1330 G_RAID_LOGREQ(0, bp, "Warning! I/O request to a disk in a " 1331 "wrong state (%s)!", g_raid_disk_state2str(disk->d_state)); 1332 goto nodisk; 1333 } 1334 1335 cp = disk->d_consumer; 1336 bp->bio_from = cp; 1337 bp->bio_to = cp->provider; 1338 cp->index++; 1339 1340 /* Update average disks load. */ 1341 TAILQ_FOREACH(tdisk, &sd->sd_softc->sc_disks, d_next) { 1342 if (tdisk->d_consumer == NULL) 1343 tdisk->d_load = 0; 1344 else 1345 tdisk->d_load = (tdisk->d_consumer->index * 1346 G_RAID_SUBDISK_LOAD_SCALE + tdisk->d_load * 7) / 8; 1347 } 1348 1349 disk->d_last_offset = bp->bio_offset + bp->bio_length; 1350 if (dumping) { 1351 G_RAID_LOGREQ(3, bp, "Sending dumping request."); 1352 if (bp->bio_cmd == BIO_WRITE) { 1353 bp->bio_error = g_raid_subdisk_kerneldump(sd, 1354 bp->bio_data, 0, bp->bio_offset, bp->bio_length); 1355 } else 1356 bp->bio_error = EOPNOTSUPP; 1357 g_raid_disk_done(bp); 1358 } else { 1359 bp->bio_done = g_raid_disk_done; 1360 bp->bio_offset += sd->sd_offset; 1361 G_RAID_LOGREQ(3, bp, "Sending request."); 1362 g_io_request(bp, cp); 1363 } 1364 } 1365 1366 int 1367 g_raid_subdisk_kerneldump(struct g_raid_subdisk *sd, 1368 void *virtual, vm_offset_t physical, off_t offset, size_t length) 1369 { 1370 1371 if (sd->sd_disk == NULL) 1372 return (ENXIO); 1373 if (sd->sd_disk->d_kd.di.dumper == NULL) 1374 return (EOPNOTSUPP); 1375 return (dump_write(&sd->sd_disk->d_kd.di, 1376 virtual, physical, 1377 sd->sd_disk->d_kd.di.mediaoffset + sd->sd_offset + offset, 1378 length)); 1379 } 1380 1381 static void 1382 g_raid_disk_done(struct bio *bp) 1383 { 1384 struct g_raid_softc *sc; 1385 struct g_raid_subdisk *sd; 1386 1387 sd = bp->bio_caller1; 1388 sc = sd->sd_softc; 1389 mtx_lock(&sc->sc_queue_mtx); 1390 bioq_disksort(&sc->sc_queue, bp); 1391 mtx_unlock(&sc->sc_queue_mtx); 1392 if (!dumping) 1393 wakeup(sc); 1394 } 1395 1396 static void 1397 g_raid_disk_done_request(struct bio *bp) 1398 { 1399 struct g_raid_softc *sc; 1400 struct g_raid_disk *disk; 1401 struct g_raid_subdisk *sd; 1402 struct g_raid_volume *vol; 1403 1404 g_topology_assert_not(); 1405 1406 G_RAID_LOGREQ(3, bp, "Disk request done: %d.", bp->bio_error); 1407 sd = bp->bio_caller1; 1408 sc = sd->sd_softc; 1409 vol = sd->sd_volume; 1410 if (bp->bio_from != NULL) { 1411 bp->bio_from->index--; 1412 disk = bp->bio_from->private; 1413 if (disk == NULL) 1414 g_raid_kill_consumer(sc, bp->bio_from); 1415 } 1416 bp->bio_offset -= sd->sd_offset; 1417 1418 G_RAID_TR_IODONE(vol->v_tr, sd, bp); 1419 } 1420 1421 static void 1422 g_raid_handle_event(struct g_raid_softc *sc, struct g_raid_event *ep) 1423 { 1424 1425 if ((ep->e_flags & G_RAID_EVENT_VOLUME) != 0) 1426 ep->e_error = g_raid_update_volume(ep->e_tgt, ep->e_event); 1427 else if ((ep->e_flags & G_RAID_EVENT_DISK) != 0) 1428 ep->e_error = g_raid_update_disk(ep->e_tgt, ep->e_event); 1429 else if ((ep->e_flags & G_RAID_EVENT_SUBDISK) != 0) 1430 ep->e_error = g_raid_update_subdisk(ep->e_tgt, ep->e_event); 1431 else 1432 ep->e_error = g_raid_update_node(ep->e_tgt, ep->e_event); 1433 if ((ep->e_flags & G_RAID_EVENT_WAIT) == 0) { 1434 KASSERT(ep->e_error == 0, 1435 ("Error cannot be handled.")); 1436 g_raid_event_free(ep); 1437 } else { 1438 ep->e_flags |= G_RAID_EVENT_DONE; 1439 G_RAID_DEBUG1(4, sc, "Waking up %p.", ep); 1440 mtx_lock(&sc->sc_queue_mtx); 1441 wakeup(ep); 1442 mtx_unlock(&sc->sc_queue_mtx); 1443 } 1444 } 1445 1446 /* 1447 * Worker thread. 1448 */ 1449 static void 1450 g_raid_worker(void *arg) 1451 { 1452 struct g_raid_softc *sc; 1453 struct g_raid_event *ep; 1454 struct g_raid_volume *vol; 1455 struct bio *bp; 1456 struct timeval now, t; 1457 int timeout, rv; 1458 1459 sc = arg; 1460 thread_lock(curthread); 1461 sched_prio(curthread, PRIBIO); 1462 thread_unlock(curthread); 1463 1464 sx_xlock(&sc->sc_lock); 1465 for (;;) { 1466 mtx_lock(&sc->sc_queue_mtx); 1467 /* 1468 * First take a look at events. 1469 * This is important to handle events before any I/O requests. 1470 */ 1471 bp = NULL; 1472 vol = NULL; 1473 rv = 0; 1474 ep = TAILQ_FIRST(&sc->sc_events); 1475 if (ep != NULL) 1476 TAILQ_REMOVE(&sc->sc_events, ep, e_next); 1477 else if ((bp = bioq_takefirst(&sc->sc_queue)) != NULL) 1478 ; 1479 else { 1480 getmicrouptime(&now); 1481 t = now; 1482 TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) { 1483 if (bioq_first(&vol->v_inflight) == NULL && 1484 vol->v_tr && 1485 timevalcmp(&vol->v_last_done, &t, < )) 1486 t = vol->v_last_done; 1487 } 1488 timevalsub(&t, &now); 1489 timeout = g_raid_idle_threshold + 1490 t.tv_sec * 1000000 + t.tv_usec; 1491 if (timeout > 0) { 1492 /* 1493 * Two steps to avoid overflows at HZ=1000 1494 * and idle timeouts > 2.1s. Some rounding 1495 * errors can occur, but they are < 1tick, 1496 * which is deemed to be close enough for 1497 * this purpose. 1498 */ 1499 int micpertic = 1000000 / hz; 1500 timeout = (timeout + micpertic - 1) / micpertic; 1501 sx_xunlock(&sc->sc_lock); 1502 MSLEEP(rv, sc, &sc->sc_queue_mtx, 1503 PRIBIO | PDROP, "-", timeout); 1504 sx_xlock(&sc->sc_lock); 1505 goto process; 1506 } else 1507 rv = EWOULDBLOCK; 1508 } 1509 mtx_unlock(&sc->sc_queue_mtx); 1510 process: 1511 if (ep != NULL) { 1512 g_raid_handle_event(sc, ep); 1513 } else if (bp != NULL) { 1514 if (bp->bio_to != NULL && 1515 bp->bio_to->geom == sc->sc_geom) 1516 g_raid_start_request(bp); 1517 else 1518 g_raid_disk_done_request(bp); 1519 } else if (rv == EWOULDBLOCK) { 1520 TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) { 1521 if (vol->v_writes == 0 && vol->v_dirty) 1522 g_raid_clean(vol, -1); 1523 if (bioq_first(&vol->v_inflight) == NULL && 1524 vol->v_tr) { 1525 t.tv_sec = g_raid_idle_threshold / 1000000; 1526 t.tv_usec = g_raid_idle_threshold % 1000000; 1527 timevaladd(&t, &vol->v_last_done); 1528 getmicrouptime(&now); 1529 if (timevalcmp(&t, &now, <= )) { 1530 G_RAID_TR_IDLE(vol->v_tr); 1531 vol->v_last_done = now; 1532 } 1533 } 1534 } 1535 } 1536 if (sc->sc_stopping == G_RAID_DESTROY_HARD) 1537 g_raid_destroy_node(sc, 1); /* May not return. */ 1538 } 1539 } 1540 1541 static void 1542 g_raid_poll(struct g_raid_softc *sc) 1543 { 1544 struct g_raid_event *ep; 1545 struct bio *bp; 1546 1547 sx_xlock(&sc->sc_lock); 1548 mtx_lock(&sc->sc_queue_mtx); 1549 /* 1550 * First take a look at events. 1551 * This is important to handle events before any I/O requests. 1552 */ 1553 ep = TAILQ_FIRST(&sc->sc_events); 1554 if (ep != NULL) { 1555 TAILQ_REMOVE(&sc->sc_events, ep, e_next); 1556 mtx_unlock(&sc->sc_queue_mtx); 1557 g_raid_handle_event(sc, ep); 1558 goto out; 1559 } 1560 bp = bioq_takefirst(&sc->sc_queue); 1561 if (bp != NULL) { 1562 mtx_unlock(&sc->sc_queue_mtx); 1563 if (bp->bio_from == NULL || 1564 bp->bio_from->geom != sc->sc_geom) 1565 g_raid_start_request(bp); 1566 else 1567 g_raid_disk_done_request(bp); 1568 } 1569 out: 1570 sx_xunlock(&sc->sc_lock); 1571 } 1572 1573 static void 1574 g_raid_launch_provider(struct g_raid_volume *vol) 1575 { 1576 struct g_raid_disk *disk; 1577 struct g_raid_softc *sc; 1578 struct g_provider *pp; 1579 char name[G_RAID_MAX_VOLUMENAME]; 1580 off_t off; 1581 1582 sc = vol->v_softc; 1583 sx_assert(&sc->sc_lock, SX_LOCKED); 1584 1585 g_topology_lock(); 1586 /* Try to name provider with volume name. */ 1587 snprintf(name, sizeof(name), "raid/%s", vol->v_name); 1588 if (g_raid_name_format == 0 || vol->v_name[0] == 0 || 1589 g_provider_by_name(name) != NULL) { 1590 /* Otherwise use sequential volume number. */ 1591 snprintf(name, sizeof(name), "raid/r%d", vol->v_global_id); 1592 } 1593 pp = g_new_providerf(sc->sc_geom, "%s", name); 1594 pp->private = vol; 1595 pp->mediasize = vol->v_mediasize; 1596 pp->sectorsize = vol->v_sectorsize; 1597 pp->stripesize = 0; 1598 pp->stripeoffset = 0; 1599 if (vol->v_raid_level == G_RAID_VOLUME_RL_RAID1 || 1600 vol->v_raid_level == G_RAID_VOLUME_RL_RAID3 || 1601 vol->v_raid_level == G_RAID_VOLUME_RL_SINGLE || 1602 vol->v_raid_level == G_RAID_VOLUME_RL_CONCAT) { 1603 if ((disk = vol->v_subdisks[0].sd_disk) != NULL && 1604 disk->d_consumer != NULL && 1605 disk->d_consumer->provider != NULL) { 1606 pp->stripesize = disk->d_consumer->provider->stripesize; 1607 off = disk->d_consumer->provider->stripeoffset; 1608 pp->stripeoffset = off + vol->v_subdisks[0].sd_offset; 1609 if (off > 0) 1610 pp->stripeoffset %= off; 1611 } 1612 if (vol->v_raid_level == G_RAID_VOLUME_RL_RAID3) { 1613 pp->stripesize *= (vol->v_disks_count - 1); 1614 pp->stripeoffset *= (vol->v_disks_count - 1); 1615 } 1616 } else 1617 pp->stripesize = vol->v_strip_size; 1618 vol->v_provider = pp; 1619 g_error_provider(pp, 0); 1620 g_topology_unlock(); 1621 G_RAID_DEBUG1(0, sc, "Provider %s for volume %s created.", 1622 pp->name, vol->v_name); 1623 } 1624 1625 static void 1626 g_raid_destroy_provider(struct g_raid_volume *vol) 1627 { 1628 struct g_raid_softc *sc; 1629 struct g_provider *pp; 1630 struct bio *bp, *tmp; 1631 1632 g_topology_assert_not(); 1633 sc = vol->v_softc; 1634 pp = vol->v_provider; 1635 KASSERT(pp != NULL, ("NULL provider (volume=%s).", vol->v_name)); 1636 1637 g_topology_lock(); 1638 g_error_provider(pp, ENXIO); 1639 mtx_lock(&sc->sc_queue_mtx); 1640 TAILQ_FOREACH_SAFE(bp, &sc->sc_queue.queue, bio_queue, tmp) { 1641 if (bp->bio_to != pp) 1642 continue; 1643 bioq_remove(&sc->sc_queue, bp); 1644 g_io_deliver(bp, ENXIO); 1645 } 1646 mtx_unlock(&sc->sc_queue_mtx); 1647 G_RAID_DEBUG1(0, sc, "Provider %s for volume %s destroyed.", 1648 pp->name, vol->v_name); 1649 g_wither_provider(pp, ENXIO); 1650 g_topology_unlock(); 1651 vol->v_provider = NULL; 1652 } 1653 1654 /* 1655 * Update device state. 1656 */ 1657 static int 1658 g_raid_update_volume(struct g_raid_volume *vol, u_int event) 1659 { 1660 struct g_raid_softc *sc; 1661 1662 sc = vol->v_softc; 1663 sx_assert(&sc->sc_lock, SX_XLOCKED); 1664 1665 G_RAID_DEBUG1(2, sc, "Event %s for volume %s.", 1666 g_raid_volume_event2str(event), 1667 vol->v_name); 1668 switch (event) { 1669 case G_RAID_VOLUME_E_DOWN: 1670 if (vol->v_provider != NULL) 1671 g_raid_destroy_provider(vol); 1672 break; 1673 case G_RAID_VOLUME_E_UP: 1674 if (vol->v_provider == NULL) 1675 g_raid_launch_provider(vol); 1676 break; 1677 case G_RAID_VOLUME_E_START: 1678 if (vol->v_tr) 1679 G_RAID_TR_START(vol->v_tr); 1680 return (0); 1681 default: 1682 if (sc->sc_md) 1683 G_RAID_MD_VOLUME_EVENT(sc->sc_md, vol, event); 1684 return (0); 1685 } 1686 1687 /* Manage root mount release. */ 1688 if (vol->v_starting) { 1689 vol->v_starting = 0; 1690 G_RAID_DEBUG1(1, sc, "root_mount_rel %p", vol->v_rootmount); 1691 root_mount_rel(vol->v_rootmount); 1692 vol->v_rootmount = NULL; 1693 } 1694 if (vol->v_stopping && vol->v_provider_open == 0) 1695 g_raid_destroy_volume(vol); 1696 return (0); 1697 } 1698 1699 /* 1700 * Update subdisk state. 1701 */ 1702 static int 1703 g_raid_update_subdisk(struct g_raid_subdisk *sd, u_int event) 1704 { 1705 struct g_raid_softc *sc; 1706 struct g_raid_volume *vol; 1707 1708 sc = sd->sd_softc; 1709 vol = sd->sd_volume; 1710 sx_assert(&sc->sc_lock, SX_XLOCKED); 1711 1712 G_RAID_DEBUG1(2, sc, "Event %s for subdisk %s:%d-%s.", 1713 g_raid_subdisk_event2str(event), 1714 vol->v_name, sd->sd_pos, 1715 sd->sd_disk ? g_raid_get_diskname(sd->sd_disk) : "[none]"); 1716 if (vol->v_tr) 1717 G_RAID_TR_EVENT(vol->v_tr, sd, event); 1718 1719 return (0); 1720 } 1721 1722 /* 1723 * Update disk state. 1724 */ 1725 static int 1726 g_raid_update_disk(struct g_raid_disk *disk, u_int event) 1727 { 1728 struct g_raid_softc *sc; 1729 1730 sc = disk->d_softc; 1731 sx_assert(&sc->sc_lock, SX_XLOCKED); 1732 1733 G_RAID_DEBUG1(2, sc, "Event %s for disk %s.", 1734 g_raid_disk_event2str(event), 1735 g_raid_get_diskname(disk)); 1736 1737 if (sc->sc_md) 1738 G_RAID_MD_EVENT(sc->sc_md, disk, event); 1739 return (0); 1740 } 1741 1742 /* 1743 * Node event. 1744 */ 1745 static int 1746 g_raid_update_node(struct g_raid_softc *sc, u_int event) 1747 { 1748 sx_assert(&sc->sc_lock, SX_XLOCKED); 1749 1750 G_RAID_DEBUG1(2, sc, "Event %s for the array.", 1751 g_raid_node_event2str(event)); 1752 1753 if (event == G_RAID_NODE_E_WAKE) 1754 return (0); 1755 if (sc->sc_md) 1756 G_RAID_MD_EVENT(sc->sc_md, NULL, event); 1757 return (0); 1758 } 1759 1760 static int 1761 g_raid_access(struct g_provider *pp, int acr, int acw, int ace) 1762 { 1763 struct g_raid_volume *vol; 1764 struct g_raid_softc *sc; 1765 int dcw, opens, error = 0; 1766 1767 g_topology_assert(); 1768 sc = pp->geom->softc; 1769 vol = pp->private; 1770 KASSERT(sc != NULL, ("NULL softc (provider=%s).", pp->name)); 1771 KASSERT(vol != NULL, ("NULL volume (provider=%s).", pp->name)); 1772 1773 G_RAID_DEBUG1(2, sc, "Access request for %s: r%dw%de%d.", pp->name, 1774 acr, acw, ace); 1775 dcw = pp->acw + acw; 1776 1777 g_topology_unlock(); 1778 sx_xlock(&sc->sc_lock); 1779 /* Deny new opens while dying. */ 1780 if (sc->sc_stopping != 0 && (acr > 0 || acw > 0 || ace > 0)) { 1781 error = ENXIO; 1782 goto out; 1783 } 1784 if (dcw == 0 && vol->v_dirty) 1785 g_raid_clean(vol, dcw); 1786 vol->v_provider_open += acr + acw + ace; 1787 /* Handle delayed node destruction. */ 1788 if (sc->sc_stopping == G_RAID_DESTROY_DELAYED && 1789 vol->v_provider_open == 0) { 1790 /* Count open volumes. */ 1791 opens = g_raid_nopens(sc); 1792 if (opens == 0) { 1793 sc->sc_stopping = G_RAID_DESTROY_HARD; 1794 /* Wake up worker to make it selfdestruct. */ 1795 g_raid_event_send(sc, G_RAID_NODE_E_WAKE, 0); 1796 } 1797 } 1798 /* Handle open volume destruction. */ 1799 if (vol->v_stopping && vol->v_provider_open == 0) 1800 g_raid_destroy_volume(vol); 1801 out: 1802 sx_xunlock(&sc->sc_lock); 1803 g_topology_lock(); 1804 return (error); 1805 } 1806 1807 struct g_raid_softc * 1808 g_raid_create_node(struct g_class *mp, 1809 const char *name, struct g_raid_md_object *md) 1810 { 1811 struct g_raid_softc *sc; 1812 struct g_geom *gp; 1813 int error; 1814 1815 g_topology_assert(); 1816 G_RAID_DEBUG(1, "Creating array %s.", name); 1817 1818 gp = g_new_geomf(mp, "%s", name); 1819 sc = malloc(sizeof(*sc), M_RAID, M_WAITOK | M_ZERO); 1820 gp->start = g_raid_start; 1821 gp->orphan = g_raid_orphan; 1822 gp->access = g_raid_access; 1823 gp->dumpconf = g_raid_dumpconf; 1824 1825 sc->sc_md = md; 1826 sc->sc_geom = gp; 1827 sc->sc_flags = 0; 1828 TAILQ_INIT(&sc->sc_volumes); 1829 TAILQ_INIT(&sc->sc_disks); 1830 sx_init(&sc->sc_lock, "graid:lock"); 1831 mtx_init(&sc->sc_queue_mtx, "graid:queue", NULL, MTX_DEF); 1832 TAILQ_INIT(&sc->sc_events); 1833 bioq_init(&sc->sc_queue); 1834 gp->softc = sc; 1835 error = kproc_create(g_raid_worker, sc, &sc->sc_worker, 0, 0, 1836 "g_raid %s", name); 1837 if (error != 0) { 1838 G_RAID_DEBUG(0, "Cannot create kernel thread for %s.", name); 1839 mtx_destroy(&sc->sc_queue_mtx); 1840 sx_destroy(&sc->sc_lock); 1841 g_destroy_geom(sc->sc_geom); 1842 free(sc, M_RAID); 1843 return (NULL); 1844 } 1845 1846 G_RAID_DEBUG1(0, sc, "Array %s created.", name); 1847 return (sc); 1848 } 1849 1850 struct g_raid_volume * 1851 g_raid_create_volume(struct g_raid_softc *sc, const char *name, int id) 1852 { 1853 struct g_raid_volume *vol, *vol1; 1854 int i; 1855 1856 G_RAID_DEBUG1(1, sc, "Creating volume %s.", name); 1857 vol = malloc(sizeof(*vol), M_RAID, M_WAITOK | M_ZERO); 1858 vol->v_softc = sc; 1859 strlcpy(vol->v_name, name, G_RAID_MAX_VOLUMENAME); 1860 vol->v_state = G_RAID_VOLUME_S_STARTING; 1861 vol->v_raid_level = G_RAID_VOLUME_RL_UNKNOWN; 1862 vol->v_raid_level_qualifier = G_RAID_VOLUME_RLQ_UNKNOWN; 1863 vol->v_rotate_parity = 1; 1864 bioq_init(&vol->v_inflight); 1865 bioq_init(&vol->v_locked); 1866 LIST_INIT(&vol->v_locks); 1867 for (i = 0; i < G_RAID_MAX_SUBDISKS; i++) { 1868 vol->v_subdisks[i].sd_softc = sc; 1869 vol->v_subdisks[i].sd_volume = vol; 1870 vol->v_subdisks[i].sd_pos = i; 1871 vol->v_subdisks[i].sd_state = G_RAID_DISK_S_NONE; 1872 } 1873 1874 /* Find free ID for this volume. */ 1875 g_topology_lock(); 1876 vol1 = vol; 1877 if (id >= 0) { 1878 LIST_FOREACH(vol1, &g_raid_volumes, v_global_next) { 1879 if (vol1->v_global_id == id) 1880 break; 1881 } 1882 } 1883 if (vol1 != NULL) { 1884 for (id = 0; ; id++) { 1885 LIST_FOREACH(vol1, &g_raid_volumes, v_global_next) { 1886 if (vol1->v_global_id == id) 1887 break; 1888 } 1889 if (vol1 == NULL) 1890 break; 1891 } 1892 } 1893 vol->v_global_id = id; 1894 LIST_INSERT_HEAD(&g_raid_volumes, vol, v_global_next); 1895 g_topology_unlock(); 1896 1897 /* Delay root mounting. */ 1898 vol->v_rootmount = root_mount_hold("GRAID"); 1899 G_RAID_DEBUG1(1, sc, "root_mount_hold %p", vol->v_rootmount); 1900 vol->v_starting = 1; 1901 TAILQ_INSERT_TAIL(&sc->sc_volumes, vol, v_next); 1902 return (vol); 1903 } 1904 1905 struct g_raid_disk * 1906 g_raid_create_disk(struct g_raid_softc *sc) 1907 { 1908 struct g_raid_disk *disk; 1909 1910 G_RAID_DEBUG1(1, sc, "Creating disk."); 1911 disk = malloc(sizeof(*disk), M_RAID, M_WAITOK | M_ZERO); 1912 disk->d_softc = sc; 1913 disk->d_state = G_RAID_DISK_S_NONE; 1914 TAILQ_INIT(&disk->d_subdisks); 1915 TAILQ_INSERT_TAIL(&sc->sc_disks, disk, d_next); 1916 return (disk); 1917 } 1918 1919 int g_raid_start_volume(struct g_raid_volume *vol) 1920 { 1921 struct g_raid_tr_class *class; 1922 struct g_raid_tr_object *obj; 1923 int status; 1924 1925 G_RAID_DEBUG1(2, vol->v_softc, "Starting volume %s.", vol->v_name); 1926 LIST_FOREACH(class, &g_raid_tr_classes, trc_list) { 1927 if (!class->trc_enable) 1928 continue; 1929 G_RAID_DEBUG1(2, vol->v_softc, 1930 "Tasting volume %s for %s transformation.", 1931 vol->v_name, class->name); 1932 obj = (void *)kobj_create((kobj_class_t)class, M_RAID, 1933 M_WAITOK); 1934 obj->tro_class = class; 1935 obj->tro_volume = vol; 1936 status = G_RAID_TR_TASTE(obj, vol); 1937 if (status != G_RAID_TR_TASTE_FAIL) 1938 break; 1939 kobj_delete((kobj_t)obj, M_RAID); 1940 } 1941 if (class == NULL) { 1942 G_RAID_DEBUG1(0, vol->v_softc, 1943 "No transformation module found for %s.", 1944 vol->v_name); 1945 vol->v_tr = NULL; 1946 g_raid_change_volume_state(vol, G_RAID_VOLUME_S_UNSUPPORTED); 1947 g_raid_event_send(vol, G_RAID_VOLUME_E_DOWN, 1948 G_RAID_EVENT_VOLUME); 1949 return (-1); 1950 } 1951 G_RAID_DEBUG1(2, vol->v_softc, 1952 "Transformation module %s chosen for %s.", 1953 class->name, vol->v_name); 1954 vol->v_tr = obj; 1955 return (0); 1956 } 1957 1958 int 1959 g_raid_destroy_node(struct g_raid_softc *sc, int worker) 1960 { 1961 struct g_raid_volume *vol, *tmpv; 1962 struct g_raid_disk *disk, *tmpd; 1963 int error = 0; 1964 1965 sc->sc_stopping = G_RAID_DESTROY_HARD; 1966 TAILQ_FOREACH_SAFE(vol, &sc->sc_volumes, v_next, tmpv) { 1967 if (g_raid_destroy_volume(vol)) 1968 error = EBUSY; 1969 } 1970 if (error) 1971 return (error); 1972 TAILQ_FOREACH_SAFE(disk, &sc->sc_disks, d_next, tmpd) { 1973 if (g_raid_destroy_disk(disk)) 1974 error = EBUSY; 1975 } 1976 if (error) 1977 return (error); 1978 if (sc->sc_md) { 1979 G_RAID_MD_FREE(sc->sc_md); 1980 kobj_delete((kobj_t)sc->sc_md, M_RAID); 1981 sc->sc_md = NULL; 1982 } 1983 if (sc->sc_geom != NULL) { 1984 G_RAID_DEBUG1(0, sc, "Array %s destroyed.", sc->sc_name); 1985 g_topology_lock(); 1986 sc->sc_geom->softc = NULL; 1987 g_wither_geom(sc->sc_geom, ENXIO); 1988 g_topology_unlock(); 1989 sc->sc_geom = NULL; 1990 } else 1991 G_RAID_DEBUG(1, "Array destroyed."); 1992 if (worker) { 1993 g_raid_event_cancel(sc, sc); 1994 mtx_destroy(&sc->sc_queue_mtx); 1995 sx_xunlock(&sc->sc_lock); 1996 sx_destroy(&sc->sc_lock); 1997 wakeup(&sc->sc_stopping); 1998 free(sc, M_RAID); 1999 curthread->td_pflags &= ~TDP_GEOM; 2000 G_RAID_DEBUG(1, "Thread exiting."); 2001 kproc_exit(0); 2002 } else { 2003 /* Wake up worker to make it selfdestruct. */ 2004 g_raid_event_send(sc, G_RAID_NODE_E_WAKE, 0); 2005 } 2006 return (0); 2007 } 2008 2009 int 2010 g_raid_destroy_volume(struct g_raid_volume *vol) 2011 { 2012 struct g_raid_softc *sc; 2013 struct g_raid_disk *disk; 2014 int i; 2015 2016 sc = vol->v_softc; 2017 G_RAID_DEBUG1(2, sc, "Destroying volume %s.", vol->v_name); 2018 vol->v_stopping = 1; 2019 if (vol->v_state != G_RAID_VOLUME_S_STOPPED) { 2020 if (vol->v_tr) { 2021 G_RAID_TR_STOP(vol->v_tr); 2022 return (EBUSY); 2023 } else 2024 vol->v_state = G_RAID_VOLUME_S_STOPPED; 2025 } 2026 if (g_raid_event_check(sc, vol) != 0) 2027 return (EBUSY); 2028 if (vol->v_provider != NULL) 2029 return (EBUSY); 2030 if (vol->v_provider_open != 0) 2031 return (EBUSY); 2032 if (vol->v_tr) { 2033 G_RAID_TR_FREE(vol->v_tr); 2034 kobj_delete((kobj_t)vol->v_tr, M_RAID); 2035 vol->v_tr = NULL; 2036 } 2037 if (vol->v_rootmount) 2038 root_mount_rel(vol->v_rootmount); 2039 g_topology_lock(); 2040 LIST_REMOVE(vol, v_global_next); 2041 g_topology_unlock(); 2042 TAILQ_REMOVE(&sc->sc_volumes, vol, v_next); 2043 for (i = 0; i < G_RAID_MAX_SUBDISKS; i++) { 2044 g_raid_event_cancel(sc, &vol->v_subdisks[i]); 2045 disk = vol->v_subdisks[i].sd_disk; 2046 if (disk == NULL) 2047 continue; 2048 TAILQ_REMOVE(&disk->d_subdisks, &vol->v_subdisks[i], sd_next); 2049 } 2050 G_RAID_DEBUG1(2, sc, "Volume %s destroyed.", vol->v_name); 2051 if (sc->sc_md) 2052 G_RAID_MD_FREE_VOLUME(sc->sc_md, vol); 2053 g_raid_event_cancel(sc, vol); 2054 free(vol, M_RAID); 2055 if (sc->sc_stopping == G_RAID_DESTROY_HARD) { 2056 /* Wake up worker to let it selfdestruct. */ 2057 g_raid_event_send(sc, G_RAID_NODE_E_WAKE, 0); 2058 } 2059 return (0); 2060 } 2061 2062 int 2063 g_raid_destroy_disk(struct g_raid_disk *disk) 2064 { 2065 struct g_raid_softc *sc; 2066 struct g_raid_subdisk *sd, *tmp; 2067 2068 sc = disk->d_softc; 2069 G_RAID_DEBUG1(2, sc, "Destroying disk."); 2070 if (disk->d_consumer) { 2071 g_raid_kill_consumer(sc, disk->d_consumer); 2072 disk->d_consumer = NULL; 2073 } 2074 TAILQ_FOREACH_SAFE(sd, &disk->d_subdisks, sd_next, tmp) { 2075 g_raid_change_subdisk_state(sd, G_RAID_SUBDISK_S_NONE); 2076 g_raid_event_send(sd, G_RAID_SUBDISK_E_DISCONNECTED, 2077 G_RAID_EVENT_SUBDISK); 2078 TAILQ_REMOVE(&disk->d_subdisks, sd, sd_next); 2079 sd->sd_disk = NULL; 2080 } 2081 TAILQ_REMOVE(&sc->sc_disks, disk, d_next); 2082 if (sc->sc_md) 2083 G_RAID_MD_FREE_DISK(sc->sc_md, disk); 2084 g_raid_event_cancel(sc, disk); 2085 free(disk, M_RAID); 2086 return (0); 2087 } 2088 2089 int 2090 g_raid_destroy(struct g_raid_softc *sc, int how) 2091 { 2092 int opens; 2093 2094 g_topology_assert_not(); 2095 if (sc == NULL) 2096 return (ENXIO); 2097 sx_assert(&sc->sc_lock, SX_XLOCKED); 2098 2099 /* Count open volumes. */ 2100 opens = g_raid_nopens(sc); 2101 2102 /* React on some opened volumes. */ 2103 if (opens > 0) { 2104 switch (how) { 2105 case G_RAID_DESTROY_SOFT: 2106 G_RAID_DEBUG1(1, sc, 2107 "%d volumes are still open.", 2108 opens); 2109 return (EBUSY); 2110 case G_RAID_DESTROY_DELAYED: 2111 G_RAID_DEBUG1(1, sc, 2112 "Array will be destroyed on last close."); 2113 sc->sc_stopping = G_RAID_DESTROY_DELAYED; 2114 return (EBUSY); 2115 case G_RAID_DESTROY_HARD: 2116 G_RAID_DEBUG1(1, sc, 2117 "%d volumes are still open.", 2118 opens); 2119 } 2120 } 2121 2122 /* Mark node for destruction. */ 2123 sc->sc_stopping = G_RAID_DESTROY_HARD; 2124 /* Wake up worker to let it selfdestruct. */ 2125 g_raid_event_send(sc, G_RAID_NODE_E_WAKE, 0); 2126 /* Sleep until node destroyed. */ 2127 sx_sleep(&sc->sc_stopping, &sc->sc_lock, 2128 PRIBIO | PDROP, "r:destroy", 0); 2129 return (0); 2130 } 2131 2132 static void 2133 g_raid_taste_orphan(struct g_consumer *cp) 2134 { 2135 2136 KASSERT(1 == 0, ("%s called while tasting %s.", __func__, 2137 cp->provider->name)); 2138 } 2139 2140 static struct g_geom * 2141 g_raid_taste(struct g_class *mp, struct g_provider *pp, int flags __unused) 2142 { 2143 struct g_consumer *cp; 2144 struct g_geom *gp, *geom; 2145 struct g_raid_md_class *class; 2146 struct g_raid_md_object *obj; 2147 int status; 2148 2149 g_topology_assert(); 2150 g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name); 2151 if (!g_raid_enable) 2152 return (NULL); 2153 G_RAID_DEBUG(2, "Tasting provider %s.", pp->name); 2154 2155 gp = g_new_geomf(mp, "raid:taste"); 2156 /* 2157 * This orphan function should be never called. 2158 */ 2159 gp->orphan = g_raid_taste_orphan; 2160 cp = g_new_consumer(gp); 2161 g_attach(cp, pp); 2162 2163 geom = NULL; 2164 LIST_FOREACH(class, &g_raid_md_classes, mdc_list) { 2165 if (!class->mdc_enable) 2166 continue; 2167 G_RAID_DEBUG(2, "Tasting provider %s for %s metadata.", 2168 pp->name, class->name); 2169 obj = (void *)kobj_create((kobj_class_t)class, M_RAID, 2170 M_WAITOK); 2171 obj->mdo_class = class; 2172 status = G_RAID_MD_TASTE(obj, mp, cp, &geom); 2173 if (status != G_RAID_MD_TASTE_NEW) 2174 kobj_delete((kobj_t)obj, M_RAID); 2175 if (status != G_RAID_MD_TASTE_FAIL) 2176 break; 2177 } 2178 2179 g_detach(cp); 2180 g_destroy_consumer(cp); 2181 g_destroy_geom(gp); 2182 G_RAID_DEBUG(2, "Tasting provider %s done.", pp->name); 2183 return (geom); 2184 } 2185 2186 int 2187 g_raid_create_node_format(const char *format, struct gctl_req *req, 2188 struct g_geom **gp) 2189 { 2190 struct g_raid_md_class *class; 2191 struct g_raid_md_object *obj; 2192 int status; 2193 2194 G_RAID_DEBUG(2, "Creating array for %s metadata.", format); 2195 LIST_FOREACH(class, &g_raid_md_classes, mdc_list) { 2196 if (strcasecmp(class->name, format) == 0) 2197 break; 2198 } 2199 if (class == NULL) { 2200 G_RAID_DEBUG(1, "No support for %s metadata.", format); 2201 return (G_RAID_MD_TASTE_FAIL); 2202 } 2203 obj = (void *)kobj_create((kobj_class_t)class, M_RAID, 2204 M_WAITOK); 2205 obj->mdo_class = class; 2206 status = G_RAID_MD_CREATE_REQ(obj, &g_raid_class, req, gp); 2207 if (status != G_RAID_MD_TASTE_NEW) 2208 kobj_delete((kobj_t)obj, M_RAID); 2209 return (status); 2210 } 2211 2212 static int 2213 g_raid_destroy_geom(struct gctl_req *req __unused, 2214 struct g_class *mp __unused, struct g_geom *gp) 2215 { 2216 struct g_raid_softc *sc; 2217 int error; 2218 2219 g_topology_unlock(); 2220 sc = gp->softc; 2221 sx_xlock(&sc->sc_lock); 2222 g_cancel_event(sc); 2223 error = g_raid_destroy(gp->softc, G_RAID_DESTROY_SOFT); 2224 if (error != 0) 2225 sx_xunlock(&sc->sc_lock); 2226 g_topology_lock(); 2227 return (error); 2228 } 2229 2230 void g_raid_write_metadata(struct g_raid_softc *sc, struct g_raid_volume *vol, 2231 struct g_raid_subdisk *sd, struct g_raid_disk *disk) 2232 { 2233 2234 if (sc->sc_stopping == G_RAID_DESTROY_HARD) 2235 return; 2236 if (sc->sc_md) 2237 G_RAID_MD_WRITE(sc->sc_md, vol, sd, disk); 2238 } 2239 2240 void g_raid_fail_disk(struct g_raid_softc *sc, 2241 struct g_raid_subdisk *sd, struct g_raid_disk *disk) 2242 { 2243 2244 if (disk == NULL) 2245 disk = sd->sd_disk; 2246 if (disk == NULL) { 2247 G_RAID_DEBUG1(0, sc, "Warning! Fail request to an absent disk!"); 2248 return; 2249 } 2250 if (disk->d_state != G_RAID_DISK_S_ACTIVE) { 2251 G_RAID_DEBUG1(0, sc, "Warning! Fail request to a disk in a " 2252 "wrong state (%s)!", g_raid_disk_state2str(disk->d_state)); 2253 return; 2254 } 2255 if (sc->sc_md) 2256 G_RAID_MD_FAIL_DISK(sc->sc_md, sd, disk); 2257 } 2258 2259 static void 2260 g_raid_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 2261 struct g_consumer *cp, struct g_provider *pp) 2262 { 2263 struct g_raid_softc *sc; 2264 struct g_raid_volume *vol; 2265 struct g_raid_subdisk *sd; 2266 struct g_raid_disk *disk; 2267 int i, s; 2268 2269 g_topology_assert(); 2270 2271 sc = gp->softc; 2272 if (sc == NULL) 2273 return; 2274 if (pp != NULL) { 2275 vol = pp->private; 2276 g_topology_unlock(); 2277 sx_xlock(&sc->sc_lock); 2278 sbuf_printf(sb, "%s<Label>%s</Label>\n", indent, 2279 vol->v_name); 2280 sbuf_printf(sb, "%s<RAIDLevel>%s</RAIDLevel>\n", indent, 2281 g_raid_volume_level2str(vol->v_raid_level, 2282 vol->v_raid_level_qualifier)); 2283 sbuf_printf(sb, 2284 "%s<Transformation>%s</Transformation>\n", indent, 2285 vol->v_tr ? vol->v_tr->tro_class->name : "NONE"); 2286 sbuf_printf(sb, "%s<Components>%u</Components>\n", indent, 2287 vol->v_disks_count); 2288 sbuf_printf(sb, "%s<Strip>%u</Strip>\n", indent, 2289 vol->v_strip_size); 2290 sbuf_printf(sb, "%s<State>%s</State>\n", indent, 2291 g_raid_volume_state2str(vol->v_state)); 2292 sbuf_printf(sb, "%s<Dirty>%s</Dirty>\n", indent, 2293 vol->v_dirty ? "Yes" : "No"); 2294 sbuf_printf(sb, "%s<Subdisks>", indent); 2295 for (i = 0; i < vol->v_disks_count; i++) { 2296 sd = &vol->v_subdisks[i]; 2297 if (sd->sd_disk != NULL && 2298 sd->sd_disk->d_consumer != NULL) { 2299 sbuf_printf(sb, "%s ", 2300 g_raid_get_diskname(sd->sd_disk)); 2301 } else { 2302 sbuf_printf(sb, "NONE "); 2303 } 2304 sbuf_printf(sb, "(%s", 2305 g_raid_subdisk_state2str(sd->sd_state)); 2306 if (sd->sd_state == G_RAID_SUBDISK_S_REBUILD || 2307 sd->sd_state == G_RAID_SUBDISK_S_RESYNC) { 2308 sbuf_printf(sb, " %d%%", 2309 (int)(sd->sd_rebuild_pos * 100 / 2310 sd->sd_size)); 2311 } 2312 sbuf_printf(sb, ")"); 2313 if (i + 1 < vol->v_disks_count) 2314 sbuf_printf(sb, ", "); 2315 } 2316 sbuf_printf(sb, "</Subdisks>\n"); 2317 sx_xunlock(&sc->sc_lock); 2318 g_topology_lock(); 2319 } else if (cp != NULL) { 2320 disk = cp->private; 2321 if (disk == NULL) 2322 return; 2323 g_topology_unlock(); 2324 sx_xlock(&sc->sc_lock); 2325 sbuf_printf(sb, "%s<State>%s", indent, 2326 g_raid_disk_state2str(disk->d_state)); 2327 if (!TAILQ_EMPTY(&disk->d_subdisks)) { 2328 sbuf_printf(sb, " ("); 2329 TAILQ_FOREACH(sd, &disk->d_subdisks, sd_next) { 2330 sbuf_printf(sb, "%s", 2331 g_raid_subdisk_state2str(sd->sd_state)); 2332 if (sd->sd_state == G_RAID_SUBDISK_S_REBUILD || 2333 sd->sd_state == G_RAID_SUBDISK_S_RESYNC) { 2334 sbuf_printf(sb, " %d%%", 2335 (int)(sd->sd_rebuild_pos * 100 / 2336 sd->sd_size)); 2337 } 2338 if (TAILQ_NEXT(sd, sd_next)) 2339 sbuf_printf(sb, ", "); 2340 } 2341 sbuf_printf(sb, ")"); 2342 } 2343 sbuf_printf(sb, "</State>\n"); 2344 sbuf_printf(sb, "%s<Subdisks>", indent); 2345 TAILQ_FOREACH(sd, &disk->d_subdisks, sd_next) { 2346 sbuf_printf(sb, "r%d(%s):%d@%ju", 2347 sd->sd_volume->v_global_id, 2348 sd->sd_volume->v_name, 2349 sd->sd_pos, sd->sd_offset); 2350 if (TAILQ_NEXT(sd, sd_next)) 2351 sbuf_printf(sb, ", "); 2352 } 2353 sbuf_printf(sb, "</Subdisks>\n"); 2354 sbuf_printf(sb, "%s<ReadErrors>%d</ReadErrors>\n", indent, 2355 disk->d_read_errs); 2356 sx_xunlock(&sc->sc_lock); 2357 g_topology_lock(); 2358 } else { 2359 g_topology_unlock(); 2360 sx_xlock(&sc->sc_lock); 2361 if (sc->sc_md) { 2362 sbuf_printf(sb, "%s<Metadata>%s</Metadata>\n", indent, 2363 sc->sc_md->mdo_class->name); 2364 } 2365 if (!TAILQ_EMPTY(&sc->sc_volumes)) { 2366 s = 0xff; 2367 TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) { 2368 if (vol->v_state < s) 2369 s = vol->v_state; 2370 } 2371 sbuf_printf(sb, "%s<State>%s</State>\n", indent, 2372 g_raid_volume_state2str(s)); 2373 } 2374 sx_xunlock(&sc->sc_lock); 2375 g_topology_lock(); 2376 } 2377 } 2378 2379 static void 2380 g_raid_shutdown_pre_sync(void *arg, int howto) 2381 { 2382 struct g_class *mp; 2383 struct g_geom *gp, *gp2; 2384 struct g_raid_softc *sc; 2385 int error; 2386 2387 mp = arg; 2388 DROP_GIANT(); 2389 g_topology_lock(); 2390 LIST_FOREACH_SAFE(gp, &mp->geom, geom, gp2) { 2391 if ((sc = gp->softc) == NULL) 2392 continue; 2393 g_topology_unlock(); 2394 sx_xlock(&sc->sc_lock); 2395 g_cancel_event(sc); 2396 error = g_raid_destroy(sc, G_RAID_DESTROY_DELAYED); 2397 if (error != 0) 2398 sx_xunlock(&sc->sc_lock); 2399 g_topology_lock(); 2400 } 2401 g_topology_unlock(); 2402 PICKUP_GIANT(); 2403 } 2404 2405 static void 2406 g_raid_init(struct g_class *mp) 2407 { 2408 2409 g_raid_pre_sync = EVENTHANDLER_REGISTER(shutdown_pre_sync, 2410 g_raid_shutdown_pre_sync, mp, SHUTDOWN_PRI_FIRST); 2411 if (g_raid_pre_sync == NULL) 2412 G_RAID_DEBUG(0, "Warning! Cannot register shutdown event."); 2413 g_raid_started = 1; 2414 } 2415 2416 static void 2417 g_raid_fini(struct g_class *mp) 2418 { 2419 2420 if (g_raid_pre_sync != NULL) 2421 EVENTHANDLER_DEREGISTER(shutdown_pre_sync, g_raid_pre_sync); 2422 g_raid_started = 0; 2423 } 2424 2425 int 2426 g_raid_md_modevent(module_t mod, int type, void *arg) 2427 { 2428 struct g_raid_md_class *class, *c, *nc; 2429 int error; 2430 2431 error = 0; 2432 class = arg; 2433 switch (type) { 2434 case MOD_LOAD: 2435 c = LIST_FIRST(&g_raid_md_classes); 2436 if (c == NULL || c->mdc_priority > class->mdc_priority) 2437 LIST_INSERT_HEAD(&g_raid_md_classes, class, mdc_list); 2438 else { 2439 while ((nc = LIST_NEXT(c, mdc_list)) != NULL && 2440 nc->mdc_priority < class->mdc_priority) 2441 c = nc; 2442 LIST_INSERT_AFTER(c, class, mdc_list); 2443 } 2444 if (g_raid_started) 2445 g_retaste(&g_raid_class); 2446 break; 2447 case MOD_UNLOAD: 2448 LIST_REMOVE(class, mdc_list); 2449 break; 2450 default: 2451 error = EOPNOTSUPP; 2452 break; 2453 } 2454 2455 return (error); 2456 } 2457 2458 int 2459 g_raid_tr_modevent(module_t mod, int type, void *arg) 2460 { 2461 struct g_raid_tr_class *class, *c, *nc; 2462 int error; 2463 2464 error = 0; 2465 class = arg; 2466 switch (type) { 2467 case MOD_LOAD: 2468 c = LIST_FIRST(&g_raid_tr_classes); 2469 if (c == NULL || c->trc_priority > class->trc_priority) 2470 LIST_INSERT_HEAD(&g_raid_tr_classes, class, trc_list); 2471 else { 2472 while ((nc = LIST_NEXT(c, trc_list)) != NULL && 2473 nc->trc_priority < class->trc_priority) 2474 c = nc; 2475 LIST_INSERT_AFTER(c, class, trc_list); 2476 } 2477 break; 2478 case MOD_UNLOAD: 2479 LIST_REMOVE(class, trc_list); 2480 break; 2481 default: 2482 error = EOPNOTSUPP; 2483 break; 2484 } 2485 2486 return (error); 2487 } 2488 2489 /* 2490 * Use local implementation of DECLARE_GEOM_CLASS(g_raid_class, g_raid) 2491 * to reduce module priority, allowing submodules to register them first. 2492 */ 2493 static moduledata_t g_raid_mod = { 2494 "g_raid", 2495 g_modevent, 2496 &g_raid_class 2497 }; 2498 DECLARE_MODULE(g_raid, g_raid_mod, SI_SUB_DRIVERS, SI_ORDER_THIRD); 2499 MODULE_VERSION(geom_raid, 0);
Cache object: 927cc5f03ddc444bf3d6ffefb07d9b37
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