Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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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("$FreeBSD$"); 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/sysctl.h> 39 #include <sys/malloc.h> 40 #include <sys/eventhandler.h> 41 #include <vm/uma.h> 42 #include <geom/geom.h> 43 #include <sys/proc.h> 44 #include <sys/kthread.h> 45 #include <sys/sched.h> 46 #include <geom/raid/g_raid.h> 47 #include "g_raid_md_if.h" 48 #include "g_raid_tr_if.h" 49 50 static MALLOC_DEFINE(M_RAID, "raid_data", "GEOM_RAID Data"); 51 52 SYSCTL_DECL(_kern_geom); 53 SYSCTL_NODE(_kern_geom, OID_AUTO, raid, CTLFLAG_RW, 0, "GEOM_RAID stuff"); 54 int g_raid_enable = 1; 55 TUNABLE_INT("kern.geom.raid.enable", &g_raid_enable); 56 SYSCTL_INT(_kern_geom_raid, OID_AUTO, enable, CTLFLAG_RW, 57 &g_raid_enable, 0, "Enable on-disk metadata taste"); 58 u_int g_raid_aggressive_spare = 0; 59 TUNABLE_INT("kern.geom.raid.aggressive_spare", &g_raid_aggressive_spare); 60 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, aggressive_spare, CTLFLAG_RW, 61 &g_raid_aggressive_spare, 0, "Use disks without metadata as spare"); 62 u_int g_raid_debug = 0; 63 TUNABLE_INT("kern.geom.raid.debug", &g_raid_debug); 64 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, debug, CTLFLAG_RW, &g_raid_debug, 0, 65 "Debug level"); 66 int g_raid_read_err_thresh = 10; 67 TUNABLE_INT("kern.geom.raid.read_err_thresh", &g_raid_read_err_thresh); 68 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, read_err_thresh, CTLFLAG_RW, 69 &g_raid_read_err_thresh, 0, 70 "Number of read errors equated to disk failure"); 71 u_int g_raid_start_timeout = 30; 72 TUNABLE_INT("kern.geom.raid.start_timeout", &g_raid_start_timeout); 73 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, start_timeout, CTLFLAG_RW, 74 &g_raid_start_timeout, 0, 75 "Time to wait for all array components"); 76 static u_int g_raid_clean_time = 5; 77 TUNABLE_INT("kern.geom.raid.clean_time", &g_raid_clean_time); 78 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, clean_time, CTLFLAG_RW, 79 &g_raid_clean_time, 0, "Mark volume as clean when idling"); 80 static u_int g_raid_disconnect_on_failure = 1; 81 TUNABLE_INT("kern.geom.raid.disconnect_on_failure", 82 &g_raid_disconnect_on_failure); 83 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, disconnect_on_failure, CTLFLAG_RW, 84 &g_raid_disconnect_on_failure, 0, "Disconnect component on I/O failure."); 85 static u_int g_raid_name_format = 0; 86 TUNABLE_INT("kern.geom.raid.name_format", &g_raid_name_format); 87 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, name_format, CTLFLAG_RW, 88 &g_raid_name_format, 0, "Providers name format."); 89 static u_int g_raid_idle_threshold = 1000000; 90 TUNABLE_INT("kern.geom.raid.idle_threshold", &g_raid_idle_threshold); 91 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, idle_threshold, CTLFLAG_RW, 92 &g_raid_idle_threshold, 1000000, 93 "Time in microseconds to consider a volume idle."); 94 95 #define MSLEEP(rv, ident, mtx, priority, wmesg, timeout) do { \ 96 G_RAID_DEBUG(4, "%s: Sleeping %p.", __func__, (ident)); \ 97 rv = msleep((ident), (mtx), (priority), (wmesg), (timeout)); \ 98 G_RAID_DEBUG(4, "%s: Woken up %p.", __func__, (ident)); \ 99 } while (0) 100 101 LIST_HEAD(, g_raid_md_class) g_raid_md_classes = 102 LIST_HEAD_INITIALIZER(g_raid_md_classes); 103 104 LIST_HEAD(, g_raid_tr_class) g_raid_tr_classes = 105 LIST_HEAD_INITIALIZER(g_raid_tr_classes); 106 107 LIST_HEAD(, g_raid_volume) g_raid_volumes = 108 LIST_HEAD_INITIALIZER(g_raid_volumes); 109 110 static eventhandler_tag g_raid_post_sync = NULL; 111 static int g_raid_started = 0; 112 static int g_raid_shutdown = 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_DISABLED: 166 return ("DISABLED"); 167 case G_RAID_DISK_S_FAILED: 168 return ("FAILED"); 169 case G_RAID_DISK_S_STALE_FAILED: 170 return ("STALE_FAILED"); 171 case G_RAID_DISK_S_SPARE: 172 return ("SPARE"); 173 case G_RAID_DISK_S_STALE: 174 return ("STALE"); 175 case G_RAID_DISK_S_ACTIVE: 176 return ("ACTIVE"); 177 default: 178 return ("INVALID"); 179 } 180 } 181 182 static const char * 183 g_raid_disk_event2str(int event) 184 { 185 186 switch (event) { 187 case G_RAID_DISK_E_DISCONNECTED: 188 return ("DISCONNECTED"); 189 default: 190 return ("INVALID"); 191 } 192 } 193 194 const char * 195 g_raid_subdisk_state2str(int state) 196 { 197 198 switch (state) { 199 case G_RAID_SUBDISK_S_NONE: 200 return ("NONE"); 201 case G_RAID_SUBDISK_S_FAILED: 202 return ("FAILED"); 203 case G_RAID_SUBDISK_S_NEW: 204 return ("NEW"); 205 case G_RAID_SUBDISK_S_REBUILD: 206 return ("REBUILD"); 207 case G_RAID_SUBDISK_S_UNINITIALIZED: 208 return ("UNINITIALIZED"); 209 case G_RAID_SUBDISK_S_STALE: 210 return ("STALE"); 211 case G_RAID_SUBDISK_S_RESYNC: 212 return ("RESYNC"); 213 case G_RAID_SUBDISK_S_ACTIVE: 214 return ("ACTIVE"); 215 default: 216 return ("INVALID"); 217 } 218 } 219 220 static const char * 221 g_raid_subdisk_event2str(int event) 222 { 223 224 switch (event) { 225 case G_RAID_SUBDISK_E_NEW: 226 return ("NEW"); 227 case G_RAID_SUBDISK_E_FAILED: 228 return ("FAILED"); 229 case G_RAID_SUBDISK_E_DISCONNECTED: 230 return ("DISCONNECTED"); 231 default: 232 return ("INVALID"); 233 } 234 } 235 236 const char * 237 g_raid_volume_state2str(int state) 238 { 239 240 switch (state) { 241 case G_RAID_VOLUME_S_STARTING: 242 return ("STARTING"); 243 case G_RAID_VOLUME_S_BROKEN: 244 return ("BROKEN"); 245 case G_RAID_VOLUME_S_DEGRADED: 246 return ("DEGRADED"); 247 case G_RAID_VOLUME_S_SUBOPTIMAL: 248 return ("SUBOPTIMAL"); 249 case G_RAID_VOLUME_S_OPTIMAL: 250 return ("OPTIMAL"); 251 case G_RAID_VOLUME_S_UNSUPPORTED: 252 return ("UNSUPPORTED"); 253 case G_RAID_VOLUME_S_STOPPED: 254 return ("STOPPED"); 255 default: 256 return ("INVALID"); 257 } 258 } 259 260 static const char * 261 g_raid_volume_event2str(int event) 262 { 263 264 switch (event) { 265 case G_RAID_VOLUME_E_UP: 266 return ("UP"); 267 case G_RAID_VOLUME_E_DOWN: 268 return ("DOWN"); 269 case G_RAID_VOLUME_E_START: 270 return ("START"); 271 case G_RAID_VOLUME_E_STARTMD: 272 return ("STARTMD"); 273 default: 274 return ("INVALID"); 275 } 276 } 277 278 const char * 279 g_raid_volume_level2str(int level, int qual) 280 { 281 282 switch (level) { 283 case G_RAID_VOLUME_RL_RAID0: 284 return ("RAID0"); 285 case G_RAID_VOLUME_RL_RAID1: 286 return ("RAID1"); 287 case G_RAID_VOLUME_RL_RAID3: 288 if (qual == G_RAID_VOLUME_RLQ_R3P0) 289 return ("RAID3-P0"); 290 if (qual == G_RAID_VOLUME_RLQ_R3PN) 291 return ("RAID3-PN"); 292 return ("RAID3"); 293 case G_RAID_VOLUME_RL_RAID4: 294 if (qual == G_RAID_VOLUME_RLQ_R4P0) 295 return ("RAID4-P0"); 296 if (qual == G_RAID_VOLUME_RLQ_R4PN) 297 return ("RAID4-PN"); 298 return ("RAID4"); 299 case G_RAID_VOLUME_RL_RAID5: 300 if (qual == G_RAID_VOLUME_RLQ_R5RA) 301 return ("RAID5-RA"); 302 if (qual == G_RAID_VOLUME_RLQ_R5RS) 303 return ("RAID5-RS"); 304 if (qual == G_RAID_VOLUME_RLQ_R5LA) 305 return ("RAID5-LA"); 306 if (qual == G_RAID_VOLUME_RLQ_R5LS) 307 return ("RAID5-LS"); 308 return ("RAID5"); 309 case G_RAID_VOLUME_RL_RAID6: 310 if (qual == G_RAID_VOLUME_RLQ_R6RA) 311 return ("RAID6-RA"); 312 if (qual == G_RAID_VOLUME_RLQ_R6RS) 313 return ("RAID6-RS"); 314 if (qual == G_RAID_VOLUME_RLQ_R6LA) 315 return ("RAID6-LA"); 316 if (qual == G_RAID_VOLUME_RLQ_R6LS) 317 return ("RAID6-LS"); 318 return ("RAID6"); 319 case G_RAID_VOLUME_RL_RAIDMDF: 320 if (qual == G_RAID_VOLUME_RLQ_RMDFRA) 321 return ("RAIDMDF-RA"); 322 if (qual == G_RAID_VOLUME_RLQ_RMDFRS) 323 return ("RAIDMDF-RS"); 324 if (qual == G_RAID_VOLUME_RLQ_RMDFLA) 325 return ("RAIDMDF-LA"); 326 if (qual == G_RAID_VOLUME_RLQ_RMDFLS) 327 return ("RAIDMDF-LS"); 328 return ("RAIDMDF"); 329 case G_RAID_VOLUME_RL_RAID1E: 330 if (qual == G_RAID_VOLUME_RLQ_R1EA) 331 return ("RAID1E-A"); 332 if (qual == G_RAID_VOLUME_RLQ_R1EO) 333 return ("RAID1E-O"); 334 return ("RAID1E"); 335 case G_RAID_VOLUME_RL_SINGLE: 336 return ("SINGLE"); 337 case G_RAID_VOLUME_RL_CONCAT: 338 return ("CONCAT"); 339 case G_RAID_VOLUME_RL_RAID5E: 340 if (qual == G_RAID_VOLUME_RLQ_R5ERA) 341 return ("RAID5E-RA"); 342 if (qual == G_RAID_VOLUME_RLQ_R5ERS) 343 return ("RAID5E-RS"); 344 if (qual == G_RAID_VOLUME_RLQ_R5ELA) 345 return ("RAID5E-LA"); 346 if (qual == G_RAID_VOLUME_RLQ_R5ELS) 347 return ("RAID5E-LS"); 348 return ("RAID5E"); 349 case G_RAID_VOLUME_RL_RAID5EE: 350 if (qual == G_RAID_VOLUME_RLQ_R5EERA) 351 return ("RAID5EE-RA"); 352 if (qual == G_RAID_VOLUME_RLQ_R5EERS) 353 return ("RAID5EE-RS"); 354 if (qual == G_RAID_VOLUME_RLQ_R5EELA) 355 return ("RAID5EE-LA"); 356 if (qual == G_RAID_VOLUME_RLQ_R5EELS) 357 return ("RAID5EE-LS"); 358 return ("RAID5EE"); 359 case G_RAID_VOLUME_RL_RAID5R: 360 if (qual == G_RAID_VOLUME_RLQ_R5RRA) 361 return ("RAID5R-RA"); 362 if (qual == G_RAID_VOLUME_RLQ_R5RRS) 363 return ("RAID5R-RS"); 364 if (qual == G_RAID_VOLUME_RLQ_R5RLA) 365 return ("RAID5R-LA"); 366 if (qual == G_RAID_VOLUME_RLQ_R5RLS) 367 return ("RAID5R-LS"); 368 return ("RAID5E"); 369 default: 370 return ("UNKNOWN"); 371 } 372 } 373 374 int 375 g_raid_volume_str2level(const char *str, int *level, int *qual) 376 { 377 378 *level = G_RAID_VOLUME_RL_UNKNOWN; 379 *qual = G_RAID_VOLUME_RLQ_NONE; 380 if (strcasecmp(str, "RAID0") == 0) 381 *level = G_RAID_VOLUME_RL_RAID0; 382 else if (strcasecmp(str, "RAID1") == 0) 383 *level = G_RAID_VOLUME_RL_RAID1; 384 else if (strcasecmp(str, "RAID3-P0") == 0) { 385 *level = G_RAID_VOLUME_RL_RAID3; 386 *qual = G_RAID_VOLUME_RLQ_R3P0; 387 } else if (strcasecmp(str, "RAID3-PN") == 0 || 388 strcasecmp(str, "RAID3") == 0) { 389 *level = G_RAID_VOLUME_RL_RAID3; 390 *qual = G_RAID_VOLUME_RLQ_R3PN; 391 } else if (strcasecmp(str, "RAID4-P0") == 0) { 392 *level = G_RAID_VOLUME_RL_RAID4; 393 *qual = G_RAID_VOLUME_RLQ_R4P0; 394 } else if (strcasecmp(str, "RAID4-PN") == 0 || 395 strcasecmp(str, "RAID4") == 0) { 396 *level = G_RAID_VOLUME_RL_RAID4; 397 *qual = G_RAID_VOLUME_RLQ_R4PN; 398 } else if (strcasecmp(str, "RAID5-RA") == 0) { 399 *level = G_RAID_VOLUME_RL_RAID5; 400 *qual = G_RAID_VOLUME_RLQ_R5RA; 401 } else if (strcasecmp(str, "RAID5-RS") == 0) { 402 *level = G_RAID_VOLUME_RL_RAID5; 403 *qual = G_RAID_VOLUME_RLQ_R5RS; 404 } else if (strcasecmp(str, "RAID5") == 0 || 405 strcasecmp(str, "RAID5-LA") == 0) { 406 *level = G_RAID_VOLUME_RL_RAID5; 407 *qual = G_RAID_VOLUME_RLQ_R5LA; 408 } else if (strcasecmp(str, "RAID5-LS") == 0) { 409 *level = G_RAID_VOLUME_RL_RAID5; 410 *qual = G_RAID_VOLUME_RLQ_R5LS; 411 } else if (strcasecmp(str, "RAID6-RA") == 0) { 412 *level = G_RAID_VOLUME_RL_RAID6; 413 *qual = G_RAID_VOLUME_RLQ_R6RA; 414 } else if (strcasecmp(str, "RAID6-RS") == 0) { 415 *level = G_RAID_VOLUME_RL_RAID6; 416 *qual = G_RAID_VOLUME_RLQ_R6RS; 417 } else if (strcasecmp(str, "RAID6") == 0 || 418 strcasecmp(str, "RAID6-LA") == 0) { 419 *level = G_RAID_VOLUME_RL_RAID6; 420 *qual = G_RAID_VOLUME_RLQ_R6LA; 421 } else if (strcasecmp(str, "RAID6-LS") == 0) { 422 *level = G_RAID_VOLUME_RL_RAID6; 423 *qual = G_RAID_VOLUME_RLQ_R6LS; 424 } else if (strcasecmp(str, "RAIDMDF-RA") == 0) { 425 *level = G_RAID_VOLUME_RL_RAIDMDF; 426 *qual = G_RAID_VOLUME_RLQ_RMDFRA; 427 } else if (strcasecmp(str, "RAIDMDF-RS") == 0) { 428 *level = G_RAID_VOLUME_RL_RAIDMDF; 429 *qual = G_RAID_VOLUME_RLQ_RMDFRS; 430 } else if (strcasecmp(str, "RAIDMDF") == 0 || 431 strcasecmp(str, "RAIDMDF-LA") == 0) { 432 *level = G_RAID_VOLUME_RL_RAIDMDF; 433 *qual = G_RAID_VOLUME_RLQ_RMDFLA; 434 } else if (strcasecmp(str, "RAIDMDF-LS") == 0) { 435 *level = G_RAID_VOLUME_RL_RAIDMDF; 436 *qual = G_RAID_VOLUME_RLQ_RMDFLS; 437 } else if (strcasecmp(str, "RAID10") == 0 || 438 strcasecmp(str, "RAID1E") == 0 || 439 strcasecmp(str, "RAID1E-A") == 0) { 440 *level = G_RAID_VOLUME_RL_RAID1E; 441 *qual = G_RAID_VOLUME_RLQ_R1EA; 442 } else if (strcasecmp(str, "RAID1E-O") == 0) { 443 *level = G_RAID_VOLUME_RL_RAID1E; 444 *qual = G_RAID_VOLUME_RLQ_R1EO; 445 } else if (strcasecmp(str, "SINGLE") == 0) 446 *level = G_RAID_VOLUME_RL_SINGLE; 447 else if (strcasecmp(str, "CONCAT") == 0) 448 *level = G_RAID_VOLUME_RL_CONCAT; 449 else if (strcasecmp(str, "RAID5E-RA") == 0) { 450 *level = G_RAID_VOLUME_RL_RAID5E; 451 *qual = G_RAID_VOLUME_RLQ_R5ERA; 452 } else if (strcasecmp(str, "RAID5E-RS") == 0) { 453 *level = G_RAID_VOLUME_RL_RAID5E; 454 *qual = G_RAID_VOLUME_RLQ_R5ERS; 455 } else if (strcasecmp(str, "RAID5E") == 0 || 456 strcasecmp(str, "RAID5E-LA") == 0) { 457 *level = G_RAID_VOLUME_RL_RAID5E; 458 *qual = G_RAID_VOLUME_RLQ_R5ELA; 459 } else if (strcasecmp(str, "RAID5E-LS") == 0) { 460 *level = G_RAID_VOLUME_RL_RAID5E; 461 *qual = G_RAID_VOLUME_RLQ_R5ELS; 462 } else if (strcasecmp(str, "RAID5EE-RA") == 0) { 463 *level = G_RAID_VOLUME_RL_RAID5EE; 464 *qual = G_RAID_VOLUME_RLQ_R5EERA; 465 } else if (strcasecmp(str, "RAID5EE-RS") == 0) { 466 *level = G_RAID_VOLUME_RL_RAID5EE; 467 *qual = G_RAID_VOLUME_RLQ_R5EERS; 468 } else if (strcasecmp(str, "RAID5EE") == 0 || 469 strcasecmp(str, "RAID5EE-LA") == 0) { 470 *level = G_RAID_VOLUME_RL_RAID5EE; 471 *qual = G_RAID_VOLUME_RLQ_R5EELA; 472 } else if (strcasecmp(str, "RAID5EE-LS") == 0) { 473 *level = G_RAID_VOLUME_RL_RAID5EE; 474 *qual = G_RAID_VOLUME_RLQ_R5EELS; 475 } else if (strcasecmp(str, "RAID5R-RA") == 0) { 476 *level = G_RAID_VOLUME_RL_RAID5R; 477 *qual = G_RAID_VOLUME_RLQ_R5RRA; 478 } else if (strcasecmp(str, "RAID5R-RS") == 0) { 479 *level = G_RAID_VOLUME_RL_RAID5R; 480 *qual = G_RAID_VOLUME_RLQ_R5RRS; 481 } else if (strcasecmp(str, "RAID5R") == 0 || 482 strcasecmp(str, "RAID5R-LA") == 0) { 483 *level = G_RAID_VOLUME_RL_RAID5R; 484 *qual = G_RAID_VOLUME_RLQ_R5RLA; 485 } else if (strcasecmp(str, "RAID5R-LS") == 0) { 486 *level = G_RAID_VOLUME_RL_RAID5R; 487 *qual = G_RAID_VOLUME_RLQ_R5RLS; 488 } else 489 return (-1); 490 return (0); 491 } 492 493 const char * 494 g_raid_get_diskname(struct g_raid_disk *disk) 495 { 496 497 if (disk->d_consumer == NULL || disk->d_consumer->provider == NULL) 498 return ("[unknown]"); 499 return (disk->d_consumer->provider->name); 500 } 501 502 void 503 g_raid_get_disk_info(struct g_raid_disk *disk) 504 { 505 struct g_consumer *cp = disk->d_consumer; 506 int error, len; 507 508 /* Read kernel dumping information. */ 509 disk->d_kd.offset = 0; 510 disk->d_kd.length = OFF_MAX; 511 len = sizeof(disk->d_kd); 512 error = g_io_getattr("GEOM::kerneldump", cp, &len, &disk->d_kd); 513 if (error) 514 disk->d_kd.di.dumper = NULL; 515 if (disk->d_kd.di.dumper == NULL) 516 G_RAID_DEBUG1(2, disk->d_softc, 517 "Dumping not supported by %s: %d.", 518 cp->provider->name, error); 519 520 /* Read BIO_DELETE support. */ 521 error = g_getattr("GEOM::candelete", cp, &disk->d_candelete); 522 if (error) 523 disk->d_candelete = 0; 524 if (!disk->d_candelete) 525 G_RAID_DEBUG1(2, disk->d_softc, 526 "BIO_DELETE not supported by %s: %d.", 527 cp->provider->name, error); 528 } 529 530 void 531 g_raid_report_disk_state(struct g_raid_disk *disk) 532 { 533 struct g_raid_subdisk *sd; 534 int len, state; 535 uint32_t s; 536 537 if (disk->d_consumer == NULL) 538 return; 539 if (disk->d_state == G_RAID_DISK_S_DISABLED) { 540 s = G_STATE_ACTIVE; /* XXX */ 541 } else if (disk->d_state == G_RAID_DISK_S_FAILED || 542 disk->d_state == G_RAID_DISK_S_STALE_FAILED) { 543 s = G_STATE_FAILED; 544 } else { 545 state = G_RAID_SUBDISK_S_ACTIVE; 546 TAILQ_FOREACH(sd, &disk->d_subdisks, sd_next) { 547 if (sd->sd_state < state) 548 state = sd->sd_state; 549 } 550 if (state == G_RAID_SUBDISK_S_FAILED) 551 s = G_STATE_FAILED; 552 else if (state == G_RAID_SUBDISK_S_NEW || 553 state == G_RAID_SUBDISK_S_REBUILD) 554 s = G_STATE_REBUILD; 555 else if (state == G_RAID_SUBDISK_S_STALE || 556 state == G_RAID_SUBDISK_S_RESYNC) 557 s = G_STATE_RESYNC; 558 else 559 s = G_STATE_ACTIVE; 560 } 561 len = sizeof(s); 562 g_io_getattr("GEOM::setstate", disk->d_consumer, &len, &s); 563 G_RAID_DEBUG1(2, disk->d_softc, "Disk %s state reported as %d.", 564 g_raid_get_diskname(disk), s); 565 } 566 567 void 568 g_raid_change_disk_state(struct g_raid_disk *disk, int state) 569 { 570 571 G_RAID_DEBUG1(0, disk->d_softc, "Disk %s state changed from %s to %s.", 572 g_raid_get_diskname(disk), 573 g_raid_disk_state2str(disk->d_state), 574 g_raid_disk_state2str(state)); 575 disk->d_state = state; 576 g_raid_report_disk_state(disk); 577 } 578 579 void 580 g_raid_change_subdisk_state(struct g_raid_subdisk *sd, int state) 581 { 582 583 G_RAID_DEBUG1(0, sd->sd_softc, 584 "Subdisk %s:%d-%s state changed from %s to %s.", 585 sd->sd_volume->v_name, sd->sd_pos, 586 sd->sd_disk ? g_raid_get_diskname(sd->sd_disk) : "[none]", 587 g_raid_subdisk_state2str(sd->sd_state), 588 g_raid_subdisk_state2str(state)); 589 sd->sd_state = state; 590 if (sd->sd_disk) 591 g_raid_report_disk_state(sd->sd_disk); 592 } 593 594 void 595 g_raid_change_volume_state(struct g_raid_volume *vol, int state) 596 { 597 598 G_RAID_DEBUG1(0, vol->v_softc, 599 "Volume %s state changed from %s to %s.", 600 vol->v_name, 601 g_raid_volume_state2str(vol->v_state), 602 g_raid_volume_state2str(state)); 603 vol->v_state = state; 604 } 605 606 /* 607 * --- Events handling functions --- 608 * Events in geom_raid are used to maintain subdisks and volumes status 609 * from one thread to simplify locking. 610 */ 611 static void 612 g_raid_event_free(struct g_raid_event *ep) 613 { 614 615 free(ep, M_RAID); 616 } 617 618 int 619 g_raid_event_send(void *arg, int event, int flags) 620 { 621 struct g_raid_softc *sc; 622 struct g_raid_event *ep; 623 int error; 624 625 if ((flags & G_RAID_EVENT_VOLUME) != 0) { 626 sc = ((struct g_raid_volume *)arg)->v_softc; 627 } else if ((flags & G_RAID_EVENT_DISK) != 0) { 628 sc = ((struct g_raid_disk *)arg)->d_softc; 629 } else if ((flags & G_RAID_EVENT_SUBDISK) != 0) { 630 sc = ((struct g_raid_subdisk *)arg)->sd_softc; 631 } else { 632 sc = arg; 633 } 634 ep = malloc(sizeof(*ep), M_RAID, 635 sx_xlocked(&sc->sc_lock) ? M_WAITOK : M_NOWAIT); 636 if (ep == NULL) 637 return (ENOMEM); 638 ep->e_tgt = arg; 639 ep->e_event = event; 640 ep->e_flags = flags; 641 ep->e_error = 0; 642 G_RAID_DEBUG1(4, sc, "Sending event %p. Waking up %p.", ep, sc); 643 mtx_lock(&sc->sc_queue_mtx); 644 TAILQ_INSERT_TAIL(&sc->sc_events, ep, e_next); 645 mtx_unlock(&sc->sc_queue_mtx); 646 wakeup(sc); 647 648 if ((flags & G_RAID_EVENT_WAIT) == 0) 649 return (0); 650 651 sx_assert(&sc->sc_lock, SX_XLOCKED); 652 G_RAID_DEBUG1(4, sc, "Sleeping on %p.", ep); 653 sx_xunlock(&sc->sc_lock); 654 while ((ep->e_flags & G_RAID_EVENT_DONE) == 0) { 655 mtx_lock(&sc->sc_queue_mtx); 656 MSLEEP(error, ep, &sc->sc_queue_mtx, PRIBIO | PDROP, "m:event", 657 hz * 5); 658 } 659 error = ep->e_error; 660 g_raid_event_free(ep); 661 sx_xlock(&sc->sc_lock); 662 return (error); 663 } 664 665 static void 666 g_raid_event_cancel(struct g_raid_softc *sc, void *tgt) 667 { 668 struct g_raid_event *ep, *tmpep; 669 670 sx_assert(&sc->sc_lock, SX_XLOCKED); 671 672 mtx_lock(&sc->sc_queue_mtx); 673 TAILQ_FOREACH_SAFE(ep, &sc->sc_events, e_next, tmpep) { 674 if (ep->e_tgt != tgt) 675 continue; 676 TAILQ_REMOVE(&sc->sc_events, ep, e_next); 677 if ((ep->e_flags & G_RAID_EVENT_WAIT) == 0) 678 g_raid_event_free(ep); 679 else { 680 ep->e_error = ECANCELED; 681 wakeup(ep); 682 } 683 } 684 mtx_unlock(&sc->sc_queue_mtx); 685 } 686 687 static int 688 g_raid_event_check(struct g_raid_softc *sc, void *tgt) 689 { 690 struct g_raid_event *ep; 691 int res = 0; 692 693 sx_assert(&sc->sc_lock, SX_XLOCKED); 694 695 mtx_lock(&sc->sc_queue_mtx); 696 TAILQ_FOREACH(ep, &sc->sc_events, e_next) { 697 if (ep->e_tgt != tgt) 698 continue; 699 res = 1; 700 break; 701 } 702 mtx_unlock(&sc->sc_queue_mtx); 703 return (res); 704 } 705 706 /* 707 * Return the number of disks in given state. 708 * If state is equal to -1, count all connected disks. 709 */ 710 u_int 711 g_raid_ndisks(struct g_raid_softc *sc, int state) 712 { 713 struct g_raid_disk *disk; 714 u_int n; 715 716 sx_assert(&sc->sc_lock, SX_LOCKED); 717 718 n = 0; 719 TAILQ_FOREACH(disk, &sc->sc_disks, d_next) { 720 if (disk->d_state == state || state == -1) 721 n++; 722 } 723 return (n); 724 } 725 726 /* 727 * Return the number of subdisks in given state. 728 * If state is equal to -1, count all connected disks. 729 */ 730 u_int 731 g_raid_nsubdisks(struct g_raid_volume *vol, int state) 732 { 733 struct g_raid_subdisk *subdisk; 734 struct g_raid_softc *sc; 735 u_int i, n ; 736 737 sc = vol->v_softc; 738 sx_assert(&sc->sc_lock, SX_LOCKED); 739 740 n = 0; 741 for (i = 0; i < vol->v_disks_count; i++) { 742 subdisk = &vol->v_subdisks[i]; 743 if ((state == -1 && 744 subdisk->sd_state != G_RAID_SUBDISK_S_NONE) || 745 subdisk->sd_state == state) 746 n++; 747 } 748 return (n); 749 } 750 751 /* 752 * Return the first subdisk in given state. 753 * If state is equal to -1, then the first connected disks. 754 */ 755 struct g_raid_subdisk * 756 g_raid_get_subdisk(struct g_raid_volume *vol, int state) 757 { 758 struct g_raid_subdisk *sd; 759 struct g_raid_softc *sc; 760 u_int i; 761 762 sc = vol->v_softc; 763 sx_assert(&sc->sc_lock, SX_LOCKED); 764 765 for (i = 0; i < vol->v_disks_count; i++) { 766 sd = &vol->v_subdisks[i]; 767 if ((state == -1 && 768 sd->sd_state != G_RAID_SUBDISK_S_NONE) || 769 sd->sd_state == state) 770 return (sd); 771 } 772 return (NULL); 773 } 774 775 struct g_consumer * 776 g_raid_open_consumer(struct g_raid_softc *sc, const char *name) 777 { 778 struct g_consumer *cp; 779 struct g_provider *pp; 780 781 g_topology_assert(); 782 783 if (strncmp(name, "/dev/", 5) == 0) 784 name += 5; 785 pp = g_provider_by_name(name); 786 if (pp == NULL) 787 return (NULL); 788 cp = g_new_consumer(sc->sc_geom); 789 if (g_attach(cp, pp) != 0) { 790 g_destroy_consumer(cp); 791 return (NULL); 792 } 793 if (g_access(cp, 1, 1, 1) != 0) { 794 g_detach(cp); 795 g_destroy_consumer(cp); 796 return (NULL); 797 } 798 return (cp); 799 } 800 801 static u_int 802 g_raid_nrequests(struct g_raid_softc *sc, struct g_consumer *cp) 803 { 804 struct bio *bp; 805 u_int nreqs = 0; 806 807 mtx_lock(&sc->sc_queue_mtx); 808 TAILQ_FOREACH(bp, &sc->sc_queue.queue, bio_queue) { 809 if (bp->bio_from == cp) 810 nreqs++; 811 } 812 mtx_unlock(&sc->sc_queue_mtx); 813 return (nreqs); 814 } 815 816 u_int 817 g_raid_nopens(struct g_raid_softc *sc) 818 { 819 struct g_raid_volume *vol; 820 u_int opens; 821 822 opens = 0; 823 TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) { 824 if (vol->v_provider_open != 0) 825 opens++; 826 } 827 return (opens); 828 } 829 830 static int 831 g_raid_consumer_is_busy(struct g_raid_softc *sc, struct g_consumer *cp) 832 { 833 834 if (cp->index > 0) { 835 G_RAID_DEBUG1(2, sc, 836 "I/O requests for %s exist, can't destroy it now.", 837 cp->provider->name); 838 return (1); 839 } 840 if (g_raid_nrequests(sc, cp) > 0) { 841 G_RAID_DEBUG1(2, sc, 842 "I/O requests for %s in queue, can't destroy it now.", 843 cp->provider->name); 844 return (1); 845 } 846 return (0); 847 } 848 849 static void 850 g_raid_destroy_consumer(void *arg, int flags __unused) 851 { 852 struct g_consumer *cp; 853 854 g_topology_assert(); 855 856 cp = arg; 857 G_RAID_DEBUG(1, "Consumer %s destroyed.", cp->provider->name); 858 g_detach(cp); 859 g_destroy_consumer(cp); 860 } 861 862 void 863 g_raid_kill_consumer(struct g_raid_softc *sc, struct g_consumer *cp) 864 { 865 struct g_provider *pp; 866 int retaste_wait; 867 868 g_topology_assert_not(); 869 870 g_topology_lock(); 871 cp->private = NULL; 872 if (g_raid_consumer_is_busy(sc, cp)) 873 goto out; 874 pp = cp->provider; 875 retaste_wait = 0; 876 if (cp->acw == 1) { 877 if ((pp->geom->flags & G_GEOM_WITHER) == 0) 878 retaste_wait = 1; 879 } 880 if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0) 881 g_access(cp, -cp->acr, -cp->acw, -cp->ace); 882 if (retaste_wait) { 883 /* 884 * After retaste event was send (inside g_access()), we can send 885 * event to detach and destroy consumer. 886 * A class, which has consumer to the given provider connected 887 * will not receive retaste event for the provider. 888 * This is the way how I ignore retaste events when I close 889 * consumers opened for write: I detach and destroy consumer 890 * after retaste event is sent. 891 */ 892 g_post_event(g_raid_destroy_consumer, cp, M_WAITOK, NULL); 893 goto out; 894 } 895 G_RAID_DEBUG(1, "Consumer %s destroyed.", pp->name); 896 g_detach(cp); 897 g_destroy_consumer(cp); 898 out: 899 g_topology_unlock(); 900 } 901 902 static void 903 g_raid_orphan(struct g_consumer *cp) 904 { 905 struct g_raid_disk *disk; 906 907 g_topology_assert(); 908 909 disk = cp->private; 910 if (disk == NULL) 911 return; 912 g_raid_event_send(disk, G_RAID_DISK_E_DISCONNECTED, 913 G_RAID_EVENT_DISK); 914 } 915 916 static void 917 g_raid_clean(struct g_raid_volume *vol, int acw) 918 { 919 struct g_raid_softc *sc; 920 int timeout; 921 922 sc = vol->v_softc; 923 g_topology_assert_not(); 924 sx_assert(&sc->sc_lock, SX_XLOCKED); 925 926 // if ((sc->sc_flags & G_RAID_DEVICE_FLAG_NOFAILSYNC) != 0) 927 // return; 928 if (!vol->v_dirty) 929 return; 930 if (vol->v_writes > 0) 931 return; 932 if (acw > 0 || (acw == -1 && 933 vol->v_provider != NULL && vol->v_provider->acw > 0)) { 934 timeout = g_raid_clean_time - (time_uptime - vol->v_last_write); 935 if (!g_raid_shutdown && timeout > 0) 936 return; 937 } 938 vol->v_dirty = 0; 939 G_RAID_DEBUG1(1, sc, "Volume %s marked as clean.", 940 vol->v_name); 941 g_raid_write_metadata(sc, vol, NULL, NULL); 942 } 943 944 static void 945 g_raid_dirty(struct g_raid_volume *vol) 946 { 947 struct g_raid_softc *sc; 948 949 sc = vol->v_softc; 950 g_topology_assert_not(); 951 sx_assert(&sc->sc_lock, SX_XLOCKED); 952 953 // if ((sc->sc_flags & G_RAID_DEVICE_FLAG_NOFAILSYNC) != 0) 954 // return; 955 vol->v_dirty = 1; 956 G_RAID_DEBUG1(1, sc, "Volume %s marked as dirty.", 957 vol->v_name); 958 g_raid_write_metadata(sc, vol, NULL, NULL); 959 } 960 961 void 962 g_raid_tr_flush_common(struct g_raid_tr_object *tr, struct bio *bp) 963 { 964 struct g_raid_softc *sc; 965 struct g_raid_volume *vol; 966 struct g_raid_subdisk *sd; 967 struct bio_queue_head queue; 968 struct bio *cbp; 969 int i; 970 971 vol = tr->tro_volume; 972 sc = vol->v_softc; 973 974 /* 975 * Allocate all bios before sending any request, so we can return 976 * ENOMEM in nice and clean way. 977 */ 978 bioq_init(&queue); 979 for (i = 0; i < vol->v_disks_count; i++) { 980 sd = &vol->v_subdisks[i]; 981 if (sd->sd_state == G_RAID_SUBDISK_S_NONE || 982 sd->sd_state == G_RAID_SUBDISK_S_FAILED) 983 continue; 984 cbp = g_clone_bio(bp); 985 if (cbp == NULL) 986 goto failure; 987 cbp->bio_caller1 = sd; 988 bioq_insert_tail(&queue, cbp); 989 } 990 for (cbp = bioq_first(&queue); cbp != NULL; 991 cbp = bioq_first(&queue)) { 992 bioq_remove(&queue, cbp); 993 sd = cbp->bio_caller1; 994 cbp->bio_caller1 = NULL; 995 g_raid_subdisk_iostart(sd, cbp); 996 } 997 return; 998 failure: 999 for (cbp = bioq_first(&queue); cbp != NULL; 1000 cbp = bioq_first(&queue)) { 1001 bioq_remove(&queue, cbp); 1002 g_destroy_bio(cbp); 1003 } 1004 if (bp->bio_error == 0) 1005 bp->bio_error = ENOMEM; 1006 g_raid_iodone(bp, bp->bio_error); 1007 } 1008 1009 static void 1010 g_raid_tr_kerneldump_common_done(struct bio *bp) 1011 { 1012 1013 bp->bio_flags |= BIO_DONE; 1014 } 1015 1016 int 1017 g_raid_tr_kerneldump_common(struct g_raid_tr_object *tr, 1018 void *virtual, vm_offset_t physical, off_t offset, size_t length) 1019 { 1020 struct g_raid_softc *sc; 1021 struct g_raid_volume *vol; 1022 struct bio bp; 1023 1024 vol = tr->tro_volume; 1025 sc = vol->v_softc; 1026 1027 bzero(&bp, sizeof(bp)); 1028 bp.bio_cmd = BIO_WRITE; 1029 bp.bio_done = g_raid_tr_kerneldump_common_done; 1030 bp.bio_attribute = NULL; 1031 bp.bio_offset = offset; 1032 bp.bio_length = length; 1033 bp.bio_data = virtual; 1034 bp.bio_to = vol->v_provider; 1035 1036 g_raid_start(&bp); 1037 while (!(bp.bio_flags & BIO_DONE)) { 1038 G_RAID_DEBUG1(4, sc, "Poll..."); 1039 g_raid_poll(sc); 1040 DELAY(10); 1041 } 1042 1043 return (bp.bio_error != 0 ? EIO : 0); 1044 } 1045 1046 static int 1047 g_raid_dump(void *arg, 1048 void *virtual, vm_offset_t physical, off_t offset, size_t length) 1049 { 1050 struct g_raid_volume *vol; 1051 int error; 1052 1053 vol = (struct g_raid_volume *)arg; 1054 G_RAID_DEBUG1(3, vol->v_softc, "Dumping at off %llu len %llu.", 1055 (long long unsigned)offset, (long long unsigned)length); 1056 1057 error = G_RAID_TR_KERNELDUMP(vol->v_tr, 1058 virtual, physical, offset, length); 1059 return (error); 1060 } 1061 1062 static void 1063 g_raid_kerneldump(struct g_raid_softc *sc, struct bio *bp) 1064 { 1065 struct g_kerneldump *gkd; 1066 struct g_provider *pp; 1067 struct g_raid_volume *vol; 1068 1069 gkd = (struct g_kerneldump*)bp->bio_data; 1070 pp = bp->bio_to; 1071 vol = pp->private; 1072 g_trace(G_T_TOPOLOGY, "g_raid_kerneldump(%s, %jd, %jd)", 1073 pp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length); 1074 gkd->di.dumper = g_raid_dump; 1075 gkd->di.priv = vol; 1076 gkd->di.blocksize = vol->v_sectorsize; 1077 gkd->di.maxiosize = DFLTPHYS; 1078 gkd->di.mediaoffset = gkd->offset; 1079 if ((gkd->offset + gkd->length) > vol->v_mediasize) 1080 gkd->length = vol->v_mediasize - gkd->offset; 1081 gkd->di.mediasize = gkd->length; 1082 g_io_deliver(bp, 0); 1083 } 1084 1085 static void 1086 g_raid_candelete(struct g_raid_softc *sc, struct bio *bp) 1087 { 1088 struct g_provider *pp; 1089 struct g_raid_volume *vol; 1090 struct g_raid_subdisk *sd; 1091 int *val; 1092 int i; 1093 1094 val = (int *)bp->bio_data; 1095 pp = bp->bio_to; 1096 vol = pp->private; 1097 *val = 0; 1098 for (i = 0; i < vol->v_disks_count; i++) { 1099 sd = &vol->v_subdisks[i]; 1100 if (sd->sd_state == G_RAID_SUBDISK_S_NONE) 1101 continue; 1102 if (sd->sd_disk->d_candelete) { 1103 *val = 1; 1104 break; 1105 } 1106 } 1107 g_io_deliver(bp, 0); 1108 } 1109 1110 static void 1111 g_raid_start(struct bio *bp) 1112 { 1113 struct g_raid_softc *sc; 1114 1115 sc = bp->bio_to->geom->softc; 1116 /* 1117 * If sc == NULL or there are no valid disks, provider's error 1118 * should be set and g_raid_start() should not be called at all. 1119 */ 1120 // KASSERT(sc != NULL && sc->sc_state == G_RAID_VOLUME_S_RUNNING, 1121 // ("Provider's error should be set (error=%d)(mirror=%s).", 1122 // bp->bio_to->error, bp->bio_to->name)); 1123 G_RAID_LOGREQ(3, bp, "Request received."); 1124 1125 switch (bp->bio_cmd) { 1126 case BIO_READ: 1127 case BIO_WRITE: 1128 case BIO_DELETE: 1129 case BIO_FLUSH: 1130 break; 1131 case BIO_GETATTR: 1132 if (!strcmp(bp->bio_attribute, "GEOM::candelete")) 1133 g_raid_candelete(sc, bp); 1134 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump")) 1135 g_raid_kerneldump(sc, bp); 1136 else 1137 g_io_deliver(bp, EOPNOTSUPP); 1138 return; 1139 default: 1140 g_io_deliver(bp, EOPNOTSUPP); 1141 return; 1142 } 1143 mtx_lock(&sc->sc_queue_mtx); 1144 bioq_insert_tail(&sc->sc_queue, bp); 1145 mtx_unlock(&sc->sc_queue_mtx); 1146 if (!dumping) { 1147 G_RAID_DEBUG1(4, sc, "Waking up %p.", sc); 1148 wakeup(sc); 1149 } 1150 } 1151 1152 static int 1153 g_raid_bio_overlaps(const struct bio *bp, off_t lstart, off_t len) 1154 { 1155 /* 1156 * 5 cases: 1157 * (1) bp entirely below NO 1158 * (2) bp entirely above NO 1159 * (3) bp start below, but end in range YES 1160 * (4) bp entirely within YES 1161 * (5) bp starts within, ends above YES 1162 * 1163 * lock range 10-19 (offset 10 length 10) 1164 * (1) 1-5: first if kicks it out 1165 * (2) 30-35: second if kicks it out 1166 * (3) 5-15: passes both ifs 1167 * (4) 12-14: passes both ifs 1168 * (5) 19-20: passes both 1169 */ 1170 off_t lend = lstart + len - 1; 1171 off_t bstart = bp->bio_offset; 1172 off_t bend = bp->bio_offset + bp->bio_length - 1; 1173 1174 if (bend < lstart) 1175 return (0); 1176 if (lend < bstart) 1177 return (0); 1178 return (1); 1179 } 1180 1181 static int 1182 g_raid_is_in_locked_range(struct g_raid_volume *vol, const struct bio *bp) 1183 { 1184 struct g_raid_lock *lp; 1185 1186 sx_assert(&vol->v_softc->sc_lock, SX_LOCKED); 1187 1188 LIST_FOREACH(lp, &vol->v_locks, l_next) { 1189 if (g_raid_bio_overlaps(bp, lp->l_offset, lp->l_length)) 1190 return (1); 1191 } 1192 return (0); 1193 } 1194 1195 static void 1196 g_raid_start_request(struct bio *bp) 1197 { 1198 struct g_raid_softc *sc; 1199 struct g_raid_volume *vol; 1200 1201 sc = bp->bio_to->geom->softc; 1202 sx_assert(&sc->sc_lock, SX_LOCKED); 1203 vol = bp->bio_to->private; 1204 1205 /* 1206 * Check to see if this item is in a locked range. If so, 1207 * queue it to our locked queue and return. We'll requeue 1208 * it when the range is unlocked. Internal I/O for the 1209 * rebuild/rescan/recovery process is excluded from this 1210 * check so we can actually do the recovery. 1211 */ 1212 if (!(bp->bio_cflags & G_RAID_BIO_FLAG_SPECIAL) && 1213 g_raid_is_in_locked_range(vol, bp)) { 1214 G_RAID_LOGREQ(3, bp, "Defer request."); 1215 bioq_insert_tail(&vol->v_locked, bp); 1216 return; 1217 } 1218 1219 /* 1220 * If we're actually going to do the write/delete, then 1221 * update the idle stats for the volume. 1222 */ 1223 if (bp->bio_cmd == BIO_WRITE || bp->bio_cmd == BIO_DELETE) { 1224 if (!vol->v_dirty) 1225 g_raid_dirty(vol); 1226 vol->v_writes++; 1227 } 1228 1229 /* 1230 * Put request onto inflight queue, so we can check if new 1231 * synchronization requests don't collide with it. Then tell 1232 * the transformation layer to start the I/O. 1233 */ 1234 bioq_insert_tail(&vol->v_inflight, bp); 1235 G_RAID_LOGREQ(4, bp, "Request started"); 1236 G_RAID_TR_IOSTART(vol->v_tr, bp); 1237 } 1238 1239 static void 1240 g_raid_finish_with_locked_ranges(struct g_raid_volume *vol, struct bio *bp) 1241 { 1242 off_t off, len; 1243 struct bio *nbp; 1244 struct g_raid_lock *lp; 1245 1246 vol->v_pending_lock = 0; 1247 LIST_FOREACH(lp, &vol->v_locks, l_next) { 1248 if (lp->l_pending) { 1249 off = lp->l_offset; 1250 len = lp->l_length; 1251 lp->l_pending = 0; 1252 TAILQ_FOREACH(nbp, &vol->v_inflight.queue, bio_queue) { 1253 if (g_raid_bio_overlaps(nbp, off, len)) 1254 lp->l_pending++; 1255 } 1256 if (lp->l_pending) { 1257 vol->v_pending_lock = 1; 1258 G_RAID_DEBUG1(4, vol->v_softc, 1259 "Deferred lock(%jd, %jd) has %d pending", 1260 (intmax_t)off, (intmax_t)(off + len), 1261 lp->l_pending); 1262 continue; 1263 } 1264 G_RAID_DEBUG1(4, vol->v_softc, 1265 "Deferred lock of %jd to %jd completed", 1266 (intmax_t)off, (intmax_t)(off + len)); 1267 G_RAID_TR_LOCKED(vol->v_tr, lp->l_callback_arg); 1268 } 1269 } 1270 } 1271 1272 void 1273 g_raid_iodone(struct bio *bp, int error) 1274 { 1275 struct g_raid_softc *sc; 1276 struct g_raid_volume *vol; 1277 1278 sc = bp->bio_to->geom->softc; 1279 sx_assert(&sc->sc_lock, SX_LOCKED); 1280 vol = bp->bio_to->private; 1281 G_RAID_LOGREQ(3, bp, "Request done: %d.", error); 1282 1283 /* Update stats if we done write/delete. */ 1284 if (bp->bio_cmd == BIO_WRITE || bp->bio_cmd == BIO_DELETE) { 1285 vol->v_writes--; 1286 vol->v_last_write = time_uptime; 1287 } 1288 1289 bioq_remove(&vol->v_inflight, bp); 1290 if (vol->v_pending_lock && g_raid_is_in_locked_range(vol, bp)) 1291 g_raid_finish_with_locked_ranges(vol, bp); 1292 getmicrouptime(&vol->v_last_done); 1293 g_io_deliver(bp, error); 1294 } 1295 1296 int 1297 g_raid_lock_range(struct g_raid_volume *vol, off_t off, off_t len, 1298 struct bio *ignore, void *argp) 1299 { 1300 struct g_raid_softc *sc; 1301 struct g_raid_lock *lp; 1302 struct bio *bp; 1303 1304 sc = vol->v_softc; 1305 lp = malloc(sizeof(*lp), M_RAID, M_WAITOK | M_ZERO); 1306 LIST_INSERT_HEAD(&vol->v_locks, lp, l_next); 1307 lp->l_offset = off; 1308 lp->l_length = len; 1309 lp->l_callback_arg = argp; 1310 1311 lp->l_pending = 0; 1312 TAILQ_FOREACH(bp, &vol->v_inflight.queue, bio_queue) { 1313 if (bp != ignore && g_raid_bio_overlaps(bp, off, len)) 1314 lp->l_pending++; 1315 } 1316 1317 /* 1318 * If there are any writes that are pending, we return EBUSY. All 1319 * callers will have to wait until all pending writes clear. 1320 */ 1321 if (lp->l_pending > 0) { 1322 vol->v_pending_lock = 1; 1323 G_RAID_DEBUG1(4, sc, "Locking range %jd to %jd deferred %d pend", 1324 (intmax_t)off, (intmax_t)(off+len), lp->l_pending); 1325 return (EBUSY); 1326 } 1327 G_RAID_DEBUG1(4, sc, "Locking range %jd to %jd", 1328 (intmax_t)off, (intmax_t)(off+len)); 1329 G_RAID_TR_LOCKED(vol->v_tr, lp->l_callback_arg); 1330 return (0); 1331 } 1332 1333 int 1334 g_raid_unlock_range(struct g_raid_volume *vol, off_t off, off_t len) 1335 { 1336 struct g_raid_lock *lp; 1337 struct g_raid_softc *sc; 1338 struct bio *bp; 1339 1340 sc = vol->v_softc; 1341 LIST_FOREACH(lp, &vol->v_locks, l_next) { 1342 if (lp->l_offset == off && lp->l_length == len) { 1343 LIST_REMOVE(lp, l_next); 1344 /* XXX 1345 * Right now we just put them all back on the queue 1346 * and hope for the best. We hope this because any 1347 * locked ranges will go right back on this list 1348 * when the worker thread runs. 1349 * XXX 1350 */ 1351 G_RAID_DEBUG1(4, sc, "Unlocked %jd to %jd", 1352 (intmax_t)lp->l_offset, 1353 (intmax_t)(lp->l_offset+lp->l_length)); 1354 mtx_lock(&sc->sc_queue_mtx); 1355 while ((bp = bioq_takefirst(&vol->v_locked)) != NULL) 1356 bioq_insert_tail(&sc->sc_queue, bp); 1357 mtx_unlock(&sc->sc_queue_mtx); 1358 free(lp, M_RAID); 1359 return (0); 1360 } 1361 } 1362 return (EINVAL); 1363 } 1364 1365 void 1366 g_raid_subdisk_iostart(struct g_raid_subdisk *sd, struct bio *bp) 1367 { 1368 struct g_consumer *cp; 1369 struct g_raid_disk *disk, *tdisk; 1370 1371 bp->bio_caller1 = sd; 1372 1373 /* 1374 * Make sure that the disk is present. Generally it is a task of 1375 * transformation layers to not send requests to absent disks, but 1376 * it is better to be safe and report situation then sorry. 1377 */ 1378 if (sd->sd_disk == NULL) { 1379 G_RAID_LOGREQ(0, bp, "Warning! I/O request to an absent disk!"); 1380 nodisk: 1381 bp->bio_from = NULL; 1382 bp->bio_to = NULL; 1383 bp->bio_error = ENXIO; 1384 g_raid_disk_done(bp); 1385 return; 1386 } 1387 disk = sd->sd_disk; 1388 if (disk->d_state != G_RAID_DISK_S_ACTIVE && 1389 disk->d_state != G_RAID_DISK_S_FAILED) { 1390 G_RAID_LOGREQ(0, bp, "Warning! I/O request to a disk in a " 1391 "wrong state (%s)!", g_raid_disk_state2str(disk->d_state)); 1392 goto nodisk; 1393 } 1394 1395 cp = disk->d_consumer; 1396 bp->bio_from = cp; 1397 bp->bio_to = cp->provider; 1398 cp->index++; 1399 1400 /* Update average disks load. */ 1401 TAILQ_FOREACH(tdisk, &sd->sd_softc->sc_disks, d_next) { 1402 if (tdisk->d_consumer == NULL) 1403 tdisk->d_load = 0; 1404 else 1405 tdisk->d_load = (tdisk->d_consumer->index * 1406 G_RAID_SUBDISK_LOAD_SCALE + tdisk->d_load * 7) / 8; 1407 } 1408 1409 disk->d_last_offset = bp->bio_offset + bp->bio_length; 1410 if (dumping) { 1411 G_RAID_LOGREQ(3, bp, "Sending dumping request."); 1412 if (bp->bio_cmd == BIO_WRITE) { 1413 bp->bio_error = g_raid_subdisk_kerneldump(sd, 1414 bp->bio_data, 0, bp->bio_offset, bp->bio_length); 1415 } else 1416 bp->bio_error = EOPNOTSUPP; 1417 g_raid_disk_done(bp); 1418 } else { 1419 bp->bio_done = g_raid_disk_done; 1420 bp->bio_offset += sd->sd_offset; 1421 G_RAID_LOGREQ(3, bp, "Sending request."); 1422 g_io_request(bp, cp); 1423 } 1424 } 1425 1426 int 1427 g_raid_subdisk_kerneldump(struct g_raid_subdisk *sd, 1428 void *virtual, vm_offset_t physical, off_t offset, size_t length) 1429 { 1430 1431 if (sd->sd_disk == NULL) 1432 return (ENXIO); 1433 if (sd->sd_disk->d_kd.di.dumper == NULL) 1434 return (EOPNOTSUPP); 1435 return (dump_write(&sd->sd_disk->d_kd.di, 1436 virtual, physical, 1437 sd->sd_disk->d_kd.di.mediaoffset + sd->sd_offset + offset, 1438 length)); 1439 } 1440 1441 static void 1442 g_raid_disk_done(struct bio *bp) 1443 { 1444 struct g_raid_softc *sc; 1445 struct g_raid_subdisk *sd; 1446 1447 sd = bp->bio_caller1; 1448 sc = sd->sd_softc; 1449 mtx_lock(&sc->sc_queue_mtx); 1450 bioq_insert_tail(&sc->sc_queue, bp); 1451 mtx_unlock(&sc->sc_queue_mtx); 1452 if (!dumping) 1453 wakeup(sc); 1454 } 1455 1456 static void 1457 g_raid_disk_done_request(struct bio *bp) 1458 { 1459 struct g_raid_softc *sc; 1460 struct g_raid_disk *disk; 1461 struct g_raid_subdisk *sd; 1462 struct g_raid_volume *vol; 1463 1464 g_topology_assert_not(); 1465 1466 G_RAID_LOGREQ(3, bp, "Disk request done: %d.", bp->bio_error); 1467 sd = bp->bio_caller1; 1468 sc = sd->sd_softc; 1469 vol = sd->sd_volume; 1470 if (bp->bio_from != NULL) { 1471 bp->bio_from->index--; 1472 disk = bp->bio_from->private; 1473 if (disk == NULL) 1474 g_raid_kill_consumer(sc, bp->bio_from); 1475 } 1476 bp->bio_offset -= sd->sd_offset; 1477 1478 G_RAID_TR_IODONE(vol->v_tr, sd, bp); 1479 } 1480 1481 static void 1482 g_raid_handle_event(struct g_raid_softc *sc, struct g_raid_event *ep) 1483 { 1484 1485 if ((ep->e_flags & G_RAID_EVENT_VOLUME) != 0) 1486 ep->e_error = g_raid_update_volume(ep->e_tgt, ep->e_event); 1487 else if ((ep->e_flags & G_RAID_EVENT_DISK) != 0) 1488 ep->e_error = g_raid_update_disk(ep->e_tgt, ep->e_event); 1489 else if ((ep->e_flags & G_RAID_EVENT_SUBDISK) != 0) 1490 ep->e_error = g_raid_update_subdisk(ep->e_tgt, ep->e_event); 1491 else 1492 ep->e_error = g_raid_update_node(ep->e_tgt, ep->e_event); 1493 if ((ep->e_flags & G_RAID_EVENT_WAIT) == 0) { 1494 KASSERT(ep->e_error == 0, 1495 ("Error cannot be handled.")); 1496 g_raid_event_free(ep); 1497 } else { 1498 ep->e_flags |= G_RAID_EVENT_DONE; 1499 G_RAID_DEBUG1(4, sc, "Waking up %p.", ep); 1500 mtx_lock(&sc->sc_queue_mtx); 1501 wakeup(ep); 1502 mtx_unlock(&sc->sc_queue_mtx); 1503 } 1504 } 1505 1506 /* 1507 * Worker thread. 1508 */ 1509 static void 1510 g_raid_worker(void *arg) 1511 { 1512 struct g_raid_softc *sc; 1513 struct g_raid_event *ep; 1514 struct g_raid_volume *vol; 1515 struct bio *bp; 1516 struct timeval now, t; 1517 int timeout, rv; 1518 1519 sc = arg; 1520 thread_lock(curthread); 1521 sched_prio(curthread, PRIBIO); 1522 thread_unlock(curthread); 1523 1524 sx_xlock(&sc->sc_lock); 1525 for (;;) { 1526 mtx_lock(&sc->sc_queue_mtx); 1527 /* 1528 * First take a look at events. 1529 * This is important to handle events before any I/O requests. 1530 */ 1531 bp = NULL; 1532 vol = NULL; 1533 rv = 0; 1534 ep = TAILQ_FIRST(&sc->sc_events); 1535 if (ep != NULL) 1536 TAILQ_REMOVE(&sc->sc_events, ep, e_next); 1537 else if ((bp = bioq_takefirst(&sc->sc_queue)) != NULL) 1538 ; 1539 else { 1540 getmicrouptime(&now); 1541 t = now; 1542 TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) { 1543 if (bioq_first(&vol->v_inflight) == NULL && 1544 vol->v_tr && 1545 timevalcmp(&vol->v_last_done, &t, < )) 1546 t = vol->v_last_done; 1547 } 1548 timevalsub(&t, &now); 1549 timeout = g_raid_idle_threshold + 1550 t.tv_sec * 1000000 + t.tv_usec; 1551 if (timeout > 0) { 1552 /* 1553 * Two steps to avoid overflows at HZ=1000 1554 * and idle timeouts > 2.1s. Some rounding 1555 * errors can occur, but they are < 1tick, 1556 * which is deemed to be close enough for 1557 * this purpose. 1558 */ 1559 int micpertic = 1000000 / hz; 1560 timeout = (timeout + micpertic - 1) / micpertic; 1561 sx_xunlock(&sc->sc_lock); 1562 MSLEEP(rv, sc, &sc->sc_queue_mtx, 1563 PRIBIO | PDROP, "-", timeout); 1564 sx_xlock(&sc->sc_lock); 1565 goto process; 1566 } else 1567 rv = EWOULDBLOCK; 1568 } 1569 mtx_unlock(&sc->sc_queue_mtx); 1570 process: 1571 if (ep != NULL) { 1572 g_raid_handle_event(sc, ep); 1573 } else if (bp != NULL) { 1574 if (bp->bio_to != NULL && 1575 bp->bio_to->geom == sc->sc_geom) 1576 g_raid_start_request(bp); 1577 else 1578 g_raid_disk_done_request(bp); 1579 } else if (rv == EWOULDBLOCK) { 1580 TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) { 1581 g_raid_clean(vol, -1); 1582 if (bioq_first(&vol->v_inflight) == NULL && 1583 vol->v_tr) { 1584 t.tv_sec = g_raid_idle_threshold / 1000000; 1585 t.tv_usec = g_raid_idle_threshold % 1000000; 1586 timevaladd(&t, &vol->v_last_done); 1587 getmicrouptime(&now); 1588 if (timevalcmp(&t, &now, <= )) { 1589 G_RAID_TR_IDLE(vol->v_tr); 1590 vol->v_last_done = now; 1591 } 1592 } 1593 } 1594 } 1595 if (sc->sc_stopping == G_RAID_DESTROY_HARD) 1596 g_raid_destroy_node(sc, 1); /* May not return. */ 1597 } 1598 } 1599 1600 static void 1601 g_raid_poll(struct g_raid_softc *sc) 1602 { 1603 struct g_raid_event *ep; 1604 struct bio *bp; 1605 1606 sx_xlock(&sc->sc_lock); 1607 mtx_lock(&sc->sc_queue_mtx); 1608 /* 1609 * First take a look at events. 1610 * This is important to handle events before any I/O requests. 1611 */ 1612 ep = TAILQ_FIRST(&sc->sc_events); 1613 if (ep != NULL) { 1614 TAILQ_REMOVE(&sc->sc_events, ep, e_next); 1615 mtx_unlock(&sc->sc_queue_mtx); 1616 g_raid_handle_event(sc, ep); 1617 goto out; 1618 } 1619 bp = bioq_takefirst(&sc->sc_queue); 1620 if (bp != NULL) { 1621 mtx_unlock(&sc->sc_queue_mtx); 1622 if (bp->bio_from == NULL || 1623 bp->bio_from->geom != sc->sc_geom) 1624 g_raid_start_request(bp); 1625 else 1626 g_raid_disk_done_request(bp); 1627 } 1628 out: 1629 sx_xunlock(&sc->sc_lock); 1630 } 1631 1632 static void 1633 g_raid_launch_provider(struct g_raid_volume *vol) 1634 { 1635 struct g_raid_disk *disk; 1636 struct g_raid_softc *sc; 1637 struct g_provider *pp; 1638 char name[G_RAID_MAX_VOLUMENAME]; 1639 off_t off; 1640 1641 sc = vol->v_softc; 1642 sx_assert(&sc->sc_lock, SX_LOCKED); 1643 1644 g_topology_lock(); 1645 /* Try to name provider with volume name. */ 1646 snprintf(name, sizeof(name), "raid/%s", vol->v_name); 1647 if (g_raid_name_format == 0 || vol->v_name[0] == 0 || 1648 g_provider_by_name(name) != NULL) { 1649 /* Otherwise use sequential volume number. */ 1650 snprintf(name, sizeof(name), "raid/r%d", vol->v_global_id); 1651 } 1652 pp = g_new_providerf(sc->sc_geom, "%s", name); 1653 pp->private = vol; 1654 pp->mediasize = vol->v_mediasize; 1655 pp->sectorsize = vol->v_sectorsize; 1656 pp->stripesize = 0; 1657 pp->stripeoffset = 0; 1658 if (vol->v_raid_level == G_RAID_VOLUME_RL_RAID1 || 1659 vol->v_raid_level == G_RAID_VOLUME_RL_RAID3 || 1660 vol->v_raid_level == G_RAID_VOLUME_RL_SINGLE || 1661 vol->v_raid_level == G_RAID_VOLUME_RL_CONCAT) { 1662 if ((disk = vol->v_subdisks[0].sd_disk) != NULL && 1663 disk->d_consumer != NULL && 1664 disk->d_consumer->provider != NULL) { 1665 pp->stripesize = disk->d_consumer->provider->stripesize; 1666 off = disk->d_consumer->provider->stripeoffset; 1667 pp->stripeoffset = off + vol->v_subdisks[0].sd_offset; 1668 if (off > 0) 1669 pp->stripeoffset %= off; 1670 } 1671 if (vol->v_raid_level == G_RAID_VOLUME_RL_RAID3) { 1672 pp->stripesize *= (vol->v_disks_count - 1); 1673 pp->stripeoffset *= (vol->v_disks_count - 1); 1674 } 1675 } else 1676 pp->stripesize = vol->v_strip_size; 1677 vol->v_provider = pp; 1678 g_error_provider(pp, 0); 1679 g_topology_unlock(); 1680 G_RAID_DEBUG1(0, sc, "Provider %s for volume %s created.", 1681 pp->name, vol->v_name); 1682 } 1683 1684 static void 1685 g_raid_destroy_provider(struct g_raid_volume *vol) 1686 { 1687 struct g_raid_softc *sc; 1688 struct g_provider *pp; 1689 struct bio *bp, *tmp; 1690 1691 g_topology_assert_not(); 1692 sc = vol->v_softc; 1693 pp = vol->v_provider; 1694 KASSERT(pp != NULL, ("NULL provider (volume=%s).", vol->v_name)); 1695 1696 g_topology_lock(); 1697 g_error_provider(pp, ENXIO); 1698 mtx_lock(&sc->sc_queue_mtx); 1699 TAILQ_FOREACH_SAFE(bp, &sc->sc_queue.queue, bio_queue, tmp) { 1700 if (bp->bio_to != pp) 1701 continue; 1702 bioq_remove(&sc->sc_queue, bp); 1703 g_io_deliver(bp, ENXIO); 1704 } 1705 mtx_unlock(&sc->sc_queue_mtx); 1706 G_RAID_DEBUG1(0, sc, "Provider %s for volume %s destroyed.", 1707 pp->name, vol->v_name); 1708 g_wither_provider(pp, ENXIO); 1709 g_topology_unlock(); 1710 vol->v_provider = NULL; 1711 } 1712 1713 /* 1714 * Update device state. 1715 */ 1716 static int 1717 g_raid_update_volume(struct g_raid_volume *vol, u_int event) 1718 { 1719 struct g_raid_softc *sc; 1720 1721 sc = vol->v_softc; 1722 sx_assert(&sc->sc_lock, SX_XLOCKED); 1723 1724 G_RAID_DEBUG1(2, sc, "Event %s for volume %s.", 1725 g_raid_volume_event2str(event), 1726 vol->v_name); 1727 switch (event) { 1728 case G_RAID_VOLUME_E_DOWN: 1729 if (vol->v_provider != NULL) 1730 g_raid_destroy_provider(vol); 1731 break; 1732 case G_RAID_VOLUME_E_UP: 1733 if (vol->v_provider == NULL) 1734 g_raid_launch_provider(vol); 1735 break; 1736 case G_RAID_VOLUME_E_START: 1737 if (vol->v_tr) 1738 G_RAID_TR_START(vol->v_tr); 1739 return (0); 1740 default: 1741 if (sc->sc_md) 1742 G_RAID_MD_VOLUME_EVENT(sc->sc_md, vol, event); 1743 return (0); 1744 } 1745 1746 /* Manage root mount release. */ 1747 if (vol->v_starting) { 1748 vol->v_starting = 0; 1749 G_RAID_DEBUG1(1, sc, "root_mount_rel %p", vol->v_rootmount); 1750 root_mount_rel(vol->v_rootmount); 1751 vol->v_rootmount = NULL; 1752 } 1753 if (vol->v_stopping && vol->v_provider_open == 0) 1754 g_raid_destroy_volume(vol); 1755 return (0); 1756 } 1757 1758 /* 1759 * Update subdisk state. 1760 */ 1761 static int 1762 g_raid_update_subdisk(struct g_raid_subdisk *sd, u_int event) 1763 { 1764 struct g_raid_softc *sc; 1765 struct g_raid_volume *vol; 1766 1767 sc = sd->sd_softc; 1768 vol = sd->sd_volume; 1769 sx_assert(&sc->sc_lock, SX_XLOCKED); 1770 1771 G_RAID_DEBUG1(2, sc, "Event %s for subdisk %s:%d-%s.", 1772 g_raid_subdisk_event2str(event), 1773 vol->v_name, sd->sd_pos, 1774 sd->sd_disk ? g_raid_get_diskname(sd->sd_disk) : "[none]"); 1775 if (vol->v_tr) 1776 G_RAID_TR_EVENT(vol->v_tr, sd, event); 1777 1778 return (0); 1779 } 1780 1781 /* 1782 * Update disk state. 1783 */ 1784 static int 1785 g_raid_update_disk(struct g_raid_disk *disk, u_int event) 1786 { 1787 struct g_raid_softc *sc; 1788 1789 sc = disk->d_softc; 1790 sx_assert(&sc->sc_lock, SX_XLOCKED); 1791 1792 G_RAID_DEBUG1(2, sc, "Event %s for disk %s.", 1793 g_raid_disk_event2str(event), 1794 g_raid_get_diskname(disk)); 1795 1796 if (sc->sc_md) 1797 G_RAID_MD_EVENT(sc->sc_md, disk, event); 1798 return (0); 1799 } 1800 1801 /* 1802 * Node event. 1803 */ 1804 static int 1805 g_raid_update_node(struct g_raid_softc *sc, u_int event) 1806 { 1807 sx_assert(&sc->sc_lock, SX_XLOCKED); 1808 1809 G_RAID_DEBUG1(2, sc, "Event %s for the array.", 1810 g_raid_node_event2str(event)); 1811 1812 if (event == G_RAID_NODE_E_WAKE) 1813 return (0); 1814 if (sc->sc_md) 1815 G_RAID_MD_EVENT(sc->sc_md, NULL, event); 1816 return (0); 1817 } 1818 1819 static int 1820 g_raid_access(struct g_provider *pp, int acr, int acw, int ace) 1821 { 1822 struct g_raid_volume *vol; 1823 struct g_raid_softc *sc; 1824 int dcw, opens, error = 0; 1825 1826 g_topology_assert(); 1827 sc = pp->geom->softc; 1828 vol = pp->private; 1829 KASSERT(sc != NULL, ("NULL softc (provider=%s).", pp->name)); 1830 KASSERT(vol != NULL, ("NULL volume (provider=%s).", pp->name)); 1831 1832 G_RAID_DEBUG1(2, sc, "Access request for %s: r%dw%de%d.", pp->name, 1833 acr, acw, ace); 1834 dcw = pp->acw + acw; 1835 1836 g_topology_unlock(); 1837 sx_xlock(&sc->sc_lock); 1838 /* Deny new opens while dying. */ 1839 if (sc->sc_stopping != 0 && (acr > 0 || acw > 0 || ace > 0)) { 1840 error = ENXIO; 1841 goto out; 1842 } 1843 if (dcw == 0) 1844 g_raid_clean(vol, dcw); 1845 vol->v_provider_open += acr + acw + ace; 1846 /* Handle delayed node destruction. */ 1847 if (sc->sc_stopping == G_RAID_DESTROY_DELAYED && 1848 vol->v_provider_open == 0) { 1849 /* Count open volumes. */ 1850 opens = g_raid_nopens(sc); 1851 if (opens == 0) { 1852 sc->sc_stopping = G_RAID_DESTROY_HARD; 1853 /* Wake up worker to make it selfdestruct. */ 1854 g_raid_event_send(sc, G_RAID_NODE_E_WAKE, 0); 1855 } 1856 } 1857 /* Handle open volume destruction. */ 1858 if (vol->v_stopping && vol->v_provider_open == 0) 1859 g_raid_destroy_volume(vol); 1860 out: 1861 sx_xunlock(&sc->sc_lock); 1862 g_topology_lock(); 1863 return (error); 1864 } 1865 1866 struct g_raid_softc * 1867 g_raid_create_node(struct g_class *mp, 1868 const char *name, struct g_raid_md_object *md) 1869 { 1870 struct g_raid_softc *sc; 1871 struct g_geom *gp; 1872 int error; 1873 1874 g_topology_assert(); 1875 G_RAID_DEBUG(1, "Creating array %s.", name); 1876 1877 gp = g_new_geomf(mp, "%s", name); 1878 sc = malloc(sizeof(*sc), M_RAID, M_WAITOK | M_ZERO); 1879 gp->start = g_raid_start; 1880 gp->orphan = g_raid_orphan; 1881 gp->access = g_raid_access; 1882 gp->dumpconf = g_raid_dumpconf; 1883 1884 sc->sc_md = md; 1885 sc->sc_geom = gp; 1886 sc->sc_flags = 0; 1887 TAILQ_INIT(&sc->sc_volumes); 1888 TAILQ_INIT(&sc->sc_disks); 1889 sx_init(&sc->sc_lock, "graid:lock"); 1890 mtx_init(&sc->sc_queue_mtx, "graid:queue", NULL, MTX_DEF); 1891 TAILQ_INIT(&sc->sc_events); 1892 bioq_init(&sc->sc_queue); 1893 gp->softc = sc; 1894 error = kproc_create(g_raid_worker, sc, &sc->sc_worker, 0, 0, 1895 "g_raid %s", name); 1896 if (error != 0) { 1897 G_RAID_DEBUG(0, "Cannot create kernel thread for %s.", name); 1898 mtx_destroy(&sc->sc_queue_mtx); 1899 sx_destroy(&sc->sc_lock); 1900 g_destroy_geom(sc->sc_geom); 1901 free(sc, M_RAID); 1902 return (NULL); 1903 } 1904 1905 G_RAID_DEBUG1(0, sc, "Array %s created.", name); 1906 return (sc); 1907 } 1908 1909 struct g_raid_volume * 1910 g_raid_create_volume(struct g_raid_softc *sc, const char *name, int id) 1911 { 1912 struct g_raid_volume *vol, *vol1; 1913 int i; 1914 1915 G_RAID_DEBUG1(1, sc, "Creating volume %s.", name); 1916 vol = malloc(sizeof(*vol), M_RAID, M_WAITOK | M_ZERO); 1917 vol->v_softc = sc; 1918 strlcpy(vol->v_name, name, G_RAID_MAX_VOLUMENAME); 1919 vol->v_state = G_RAID_VOLUME_S_STARTING; 1920 vol->v_raid_level = G_RAID_VOLUME_RL_UNKNOWN; 1921 vol->v_raid_level_qualifier = G_RAID_VOLUME_RLQ_UNKNOWN; 1922 vol->v_rotate_parity = 1; 1923 bioq_init(&vol->v_inflight); 1924 bioq_init(&vol->v_locked); 1925 LIST_INIT(&vol->v_locks); 1926 for (i = 0; i < G_RAID_MAX_SUBDISKS; i++) { 1927 vol->v_subdisks[i].sd_softc = sc; 1928 vol->v_subdisks[i].sd_volume = vol; 1929 vol->v_subdisks[i].sd_pos = i; 1930 vol->v_subdisks[i].sd_state = G_RAID_DISK_S_NONE; 1931 } 1932 1933 /* Find free ID for this volume. */ 1934 g_topology_lock(); 1935 vol1 = vol; 1936 if (id >= 0) { 1937 LIST_FOREACH(vol1, &g_raid_volumes, v_global_next) { 1938 if (vol1->v_global_id == id) 1939 break; 1940 } 1941 } 1942 if (vol1 != NULL) { 1943 for (id = 0; ; id++) { 1944 LIST_FOREACH(vol1, &g_raid_volumes, v_global_next) { 1945 if (vol1->v_global_id == id) 1946 break; 1947 } 1948 if (vol1 == NULL) 1949 break; 1950 } 1951 } 1952 vol->v_global_id = id; 1953 LIST_INSERT_HEAD(&g_raid_volumes, vol, v_global_next); 1954 g_topology_unlock(); 1955 1956 /* Delay root mounting. */ 1957 vol->v_rootmount = root_mount_hold("GRAID"); 1958 G_RAID_DEBUG1(1, sc, "root_mount_hold %p", vol->v_rootmount); 1959 vol->v_starting = 1; 1960 TAILQ_INSERT_TAIL(&sc->sc_volumes, vol, v_next); 1961 return (vol); 1962 } 1963 1964 struct g_raid_disk * 1965 g_raid_create_disk(struct g_raid_softc *sc) 1966 { 1967 struct g_raid_disk *disk; 1968 1969 G_RAID_DEBUG1(1, sc, "Creating disk."); 1970 disk = malloc(sizeof(*disk), M_RAID, M_WAITOK | M_ZERO); 1971 disk->d_softc = sc; 1972 disk->d_state = G_RAID_DISK_S_NONE; 1973 TAILQ_INIT(&disk->d_subdisks); 1974 TAILQ_INSERT_TAIL(&sc->sc_disks, disk, d_next); 1975 return (disk); 1976 } 1977 1978 int g_raid_start_volume(struct g_raid_volume *vol) 1979 { 1980 struct g_raid_tr_class *class; 1981 struct g_raid_tr_object *obj; 1982 int status; 1983 1984 G_RAID_DEBUG1(2, vol->v_softc, "Starting volume %s.", vol->v_name); 1985 LIST_FOREACH(class, &g_raid_tr_classes, trc_list) { 1986 if (!class->trc_enable) 1987 continue; 1988 G_RAID_DEBUG1(2, vol->v_softc, 1989 "Tasting volume %s for %s transformation.", 1990 vol->v_name, class->name); 1991 obj = (void *)kobj_create((kobj_class_t)class, M_RAID, 1992 M_WAITOK); 1993 obj->tro_class = class; 1994 obj->tro_volume = vol; 1995 status = G_RAID_TR_TASTE(obj, vol); 1996 if (status != G_RAID_TR_TASTE_FAIL) 1997 break; 1998 kobj_delete((kobj_t)obj, M_RAID); 1999 } 2000 if (class == NULL) { 2001 G_RAID_DEBUG1(0, vol->v_softc, 2002 "No transformation module found for %s.", 2003 vol->v_name); 2004 vol->v_tr = NULL; 2005 g_raid_change_volume_state(vol, G_RAID_VOLUME_S_UNSUPPORTED); 2006 g_raid_event_send(vol, G_RAID_VOLUME_E_DOWN, 2007 G_RAID_EVENT_VOLUME); 2008 return (-1); 2009 } 2010 G_RAID_DEBUG1(2, vol->v_softc, 2011 "Transformation module %s chosen for %s.", 2012 class->name, vol->v_name); 2013 vol->v_tr = obj; 2014 return (0); 2015 } 2016 2017 int 2018 g_raid_destroy_node(struct g_raid_softc *sc, int worker) 2019 { 2020 struct g_raid_volume *vol, *tmpv; 2021 struct g_raid_disk *disk, *tmpd; 2022 int error = 0; 2023 2024 sc->sc_stopping = G_RAID_DESTROY_HARD; 2025 TAILQ_FOREACH_SAFE(vol, &sc->sc_volumes, v_next, tmpv) { 2026 if (g_raid_destroy_volume(vol)) 2027 error = EBUSY; 2028 } 2029 if (error) 2030 return (error); 2031 TAILQ_FOREACH_SAFE(disk, &sc->sc_disks, d_next, tmpd) { 2032 if (g_raid_destroy_disk(disk)) 2033 error = EBUSY; 2034 } 2035 if (error) 2036 return (error); 2037 if (sc->sc_md) { 2038 G_RAID_MD_FREE(sc->sc_md); 2039 kobj_delete((kobj_t)sc->sc_md, M_RAID); 2040 sc->sc_md = NULL; 2041 } 2042 if (sc->sc_geom != NULL) { 2043 G_RAID_DEBUG1(0, sc, "Array %s destroyed.", sc->sc_name); 2044 g_topology_lock(); 2045 sc->sc_geom->softc = NULL; 2046 g_wither_geom(sc->sc_geom, ENXIO); 2047 g_topology_unlock(); 2048 sc->sc_geom = NULL; 2049 } else 2050 G_RAID_DEBUG(1, "Array destroyed."); 2051 if (worker) { 2052 g_raid_event_cancel(sc, sc); 2053 mtx_destroy(&sc->sc_queue_mtx); 2054 sx_xunlock(&sc->sc_lock); 2055 sx_destroy(&sc->sc_lock); 2056 wakeup(&sc->sc_stopping); 2057 free(sc, M_RAID); 2058 curthread->td_pflags &= ~TDP_GEOM; 2059 G_RAID_DEBUG(1, "Thread exiting."); 2060 kproc_exit(0); 2061 } else { 2062 /* Wake up worker to make it selfdestruct. */ 2063 g_raid_event_send(sc, G_RAID_NODE_E_WAKE, 0); 2064 } 2065 return (0); 2066 } 2067 2068 int 2069 g_raid_destroy_volume(struct g_raid_volume *vol) 2070 { 2071 struct g_raid_softc *sc; 2072 struct g_raid_disk *disk; 2073 int i; 2074 2075 sc = vol->v_softc; 2076 G_RAID_DEBUG1(2, sc, "Destroying volume %s.", vol->v_name); 2077 vol->v_stopping = 1; 2078 if (vol->v_state != G_RAID_VOLUME_S_STOPPED) { 2079 if (vol->v_tr) { 2080 G_RAID_TR_STOP(vol->v_tr); 2081 return (EBUSY); 2082 } else 2083 vol->v_state = G_RAID_VOLUME_S_STOPPED; 2084 } 2085 if (g_raid_event_check(sc, vol) != 0) 2086 return (EBUSY); 2087 if (vol->v_provider != NULL) 2088 return (EBUSY); 2089 if (vol->v_provider_open != 0) 2090 return (EBUSY); 2091 if (vol->v_tr) { 2092 G_RAID_TR_FREE(vol->v_tr); 2093 kobj_delete((kobj_t)vol->v_tr, M_RAID); 2094 vol->v_tr = NULL; 2095 } 2096 if (vol->v_rootmount) 2097 root_mount_rel(vol->v_rootmount); 2098 g_topology_lock(); 2099 LIST_REMOVE(vol, v_global_next); 2100 g_topology_unlock(); 2101 TAILQ_REMOVE(&sc->sc_volumes, vol, v_next); 2102 for (i = 0; i < G_RAID_MAX_SUBDISKS; i++) { 2103 g_raid_event_cancel(sc, &vol->v_subdisks[i]); 2104 disk = vol->v_subdisks[i].sd_disk; 2105 if (disk == NULL) 2106 continue; 2107 TAILQ_REMOVE(&disk->d_subdisks, &vol->v_subdisks[i], sd_next); 2108 } 2109 G_RAID_DEBUG1(2, sc, "Volume %s destroyed.", vol->v_name); 2110 if (sc->sc_md) 2111 G_RAID_MD_FREE_VOLUME(sc->sc_md, vol); 2112 g_raid_event_cancel(sc, vol); 2113 free(vol, M_RAID); 2114 if (sc->sc_stopping == G_RAID_DESTROY_HARD) { 2115 /* Wake up worker to let it selfdestruct. */ 2116 g_raid_event_send(sc, G_RAID_NODE_E_WAKE, 0); 2117 } 2118 return (0); 2119 } 2120 2121 int 2122 g_raid_destroy_disk(struct g_raid_disk *disk) 2123 { 2124 struct g_raid_softc *sc; 2125 struct g_raid_subdisk *sd, *tmp; 2126 2127 sc = disk->d_softc; 2128 G_RAID_DEBUG1(2, sc, "Destroying disk."); 2129 if (disk->d_consumer) { 2130 g_raid_kill_consumer(sc, disk->d_consumer); 2131 disk->d_consumer = NULL; 2132 } 2133 TAILQ_FOREACH_SAFE(sd, &disk->d_subdisks, sd_next, tmp) { 2134 g_raid_change_subdisk_state(sd, G_RAID_SUBDISK_S_NONE); 2135 g_raid_event_send(sd, G_RAID_SUBDISK_E_DISCONNECTED, 2136 G_RAID_EVENT_SUBDISK); 2137 TAILQ_REMOVE(&disk->d_subdisks, sd, sd_next); 2138 sd->sd_disk = NULL; 2139 } 2140 TAILQ_REMOVE(&sc->sc_disks, disk, d_next); 2141 if (sc->sc_md) 2142 G_RAID_MD_FREE_DISK(sc->sc_md, disk); 2143 g_raid_event_cancel(sc, disk); 2144 free(disk, M_RAID); 2145 return (0); 2146 } 2147 2148 int 2149 g_raid_destroy(struct g_raid_softc *sc, int how) 2150 { 2151 int opens; 2152 2153 g_topology_assert_not(); 2154 if (sc == NULL) 2155 return (ENXIO); 2156 sx_assert(&sc->sc_lock, SX_XLOCKED); 2157 2158 /* Count open volumes. */ 2159 opens = g_raid_nopens(sc); 2160 2161 /* React on some opened volumes. */ 2162 if (opens > 0) { 2163 switch (how) { 2164 case G_RAID_DESTROY_SOFT: 2165 G_RAID_DEBUG1(1, sc, 2166 "%d volumes are still open.", 2167 opens); 2168 return (EBUSY); 2169 case G_RAID_DESTROY_DELAYED: 2170 G_RAID_DEBUG1(1, sc, 2171 "Array will be destroyed on last close."); 2172 sc->sc_stopping = G_RAID_DESTROY_DELAYED; 2173 return (EBUSY); 2174 case G_RAID_DESTROY_HARD: 2175 G_RAID_DEBUG1(1, sc, 2176 "%d volumes are still open.", 2177 opens); 2178 } 2179 } 2180 2181 /* Mark node for destruction. */ 2182 sc->sc_stopping = G_RAID_DESTROY_HARD; 2183 /* Wake up worker to let it selfdestruct. */ 2184 g_raid_event_send(sc, G_RAID_NODE_E_WAKE, 0); 2185 /* Sleep until node destroyed. */ 2186 sx_sleep(&sc->sc_stopping, &sc->sc_lock, 2187 PRIBIO | PDROP, "r:destroy", 0); 2188 return (0); 2189 } 2190 2191 static void 2192 g_raid_taste_orphan(struct g_consumer *cp) 2193 { 2194 2195 KASSERT(1 == 0, ("%s called while tasting %s.", __func__, 2196 cp->provider->name)); 2197 } 2198 2199 static struct g_geom * 2200 g_raid_taste(struct g_class *mp, struct g_provider *pp, int flags __unused) 2201 { 2202 struct g_consumer *cp; 2203 struct g_geom *gp, *geom; 2204 struct g_raid_md_class *class; 2205 struct g_raid_md_object *obj; 2206 int status; 2207 2208 g_topology_assert(); 2209 g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name); 2210 if (!g_raid_enable) 2211 return (NULL); 2212 G_RAID_DEBUG(2, "Tasting provider %s.", pp->name); 2213 2214 gp = g_new_geomf(mp, "raid:taste"); 2215 /* 2216 * This orphan function should be never called. 2217 */ 2218 gp->orphan = g_raid_taste_orphan; 2219 cp = g_new_consumer(gp); 2220 g_attach(cp, pp); 2221 2222 geom = NULL; 2223 LIST_FOREACH(class, &g_raid_md_classes, mdc_list) { 2224 if (!class->mdc_enable) 2225 continue; 2226 G_RAID_DEBUG(2, "Tasting provider %s for %s metadata.", 2227 pp->name, class->name); 2228 obj = (void *)kobj_create((kobj_class_t)class, M_RAID, 2229 M_WAITOK); 2230 obj->mdo_class = class; 2231 status = G_RAID_MD_TASTE(obj, mp, cp, &geom); 2232 if (status != G_RAID_MD_TASTE_NEW) 2233 kobj_delete((kobj_t)obj, M_RAID); 2234 if (status != G_RAID_MD_TASTE_FAIL) 2235 break; 2236 } 2237 2238 g_detach(cp); 2239 g_destroy_consumer(cp); 2240 g_destroy_geom(gp); 2241 G_RAID_DEBUG(2, "Tasting provider %s done.", pp->name); 2242 return (geom); 2243 } 2244 2245 int 2246 g_raid_create_node_format(const char *format, struct gctl_req *req, 2247 struct g_geom **gp) 2248 { 2249 struct g_raid_md_class *class; 2250 struct g_raid_md_object *obj; 2251 int status; 2252 2253 G_RAID_DEBUG(2, "Creating array for %s metadata.", format); 2254 LIST_FOREACH(class, &g_raid_md_classes, mdc_list) { 2255 if (strcasecmp(class->name, format) == 0) 2256 break; 2257 } 2258 if (class == NULL) { 2259 G_RAID_DEBUG(1, "No support for %s metadata.", format); 2260 return (G_RAID_MD_TASTE_FAIL); 2261 } 2262 obj = (void *)kobj_create((kobj_class_t)class, M_RAID, 2263 M_WAITOK); 2264 obj->mdo_class = class; 2265 status = G_RAID_MD_CREATE_REQ(obj, &g_raid_class, req, gp); 2266 if (status != G_RAID_MD_TASTE_NEW) 2267 kobj_delete((kobj_t)obj, M_RAID); 2268 return (status); 2269 } 2270 2271 static int 2272 g_raid_destroy_geom(struct gctl_req *req __unused, 2273 struct g_class *mp __unused, struct g_geom *gp) 2274 { 2275 struct g_raid_softc *sc; 2276 int error; 2277 2278 g_topology_unlock(); 2279 sc = gp->softc; 2280 sx_xlock(&sc->sc_lock); 2281 g_cancel_event(sc); 2282 error = g_raid_destroy(gp->softc, G_RAID_DESTROY_SOFT); 2283 if (error != 0) 2284 sx_xunlock(&sc->sc_lock); 2285 g_topology_lock(); 2286 return (error); 2287 } 2288 2289 void g_raid_write_metadata(struct g_raid_softc *sc, struct g_raid_volume *vol, 2290 struct g_raid_subdisk *sd, struct g_raid_disk *disk) 2291 { 2292 2293 if (sc->sc_stopping == G_RAID_DESTROY_HARD) 2294 return; 2295 if (sc->sc_md) 2296 G_RAID_MD_WRITE(sc->sc_md, vol, sd, disk); 2297 } 2298 2299 void g_raid_fail_disk(struct g_raid_softc *sc, 2300 struct g_raid_subdisk *sd, struct g_raid_disk *disk) 2301 { 2302 2303 if (disk == NULL) 2304 disk = sd->sd_disk; 2305 if (disk == NULL) { 2306 G_RAID_DEBUG1(0, sc, "Warning! Fail request to an absent disk!"); 2307 return; 2308 } 2309 if (disk->d_state != G_RAID_DISK_S_ACTIVE) { 2310 G_RAID_DEBUG1(0, sc, "Warning! Fail request to a disk in a " 2311 "wrong state (%s)!", g_raid_disk_state2str(disk->d_state)); 2312 return; 2313 } 2314 if (sc->sc_md) 2315 G_RAID_MD_FAIL_DISK(sc->sc_md, sd, disk); 2316 } 2317 2318 static void 2319 g_raid_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 2320 struct g_consumer *cp, struct g_provider *pp) 2321 { 2322 struct g_raid_softc *sc; 2323 struct g_raid_volume *vol; 2324 struct g_raid_subdisk *sd; 2325 struct g_raid_disk *disk; 2326 int i, s; 2327 2328 g_topology_assert(); 2329 2330 sc = gp->softc; 2331 if (sc == NULL) 2332 return; 2333 if (pp != NULL) { 2334 vol = pp->private; 2335 g_topology_unlock(); 2336 sx_xlock(&sc->sc_lock); 2337 sbuf_printf(sb, "%s<Label>%s</Label>\n", indent, 2338 vol->v_name); 2339 sbuf_printf(sb, "%s<RAIDLevel>%s</RAIDLevel>\n", indent, 2340 g_raid_volume_level2str(vol->v_raid_level, 2341 vol->v_raid_level_qualifier)); 2342 sbuf_printf(sb, 2343 "%s<Transformation>%s</Transformation>\n", indent, 2344 vol->v_tr ? vol->v_tr->tro_class->name : "NONE"); 2345 sbuf_printf(sb, "%s<Components>%u</Components>\n", indent, 2346 vol->v_disks_count); 2347 sbuf_printf(sb, "%s<Strip>%u</Strip>\n", indent, 2348 vol->v_strip_size); 2349 sbuf_printf(sb, "%s<State>%s</State>\n", indent, 2350 g_raid_volume_state2str(vol->v_state)); 2351 sbuf_printf(sb, "%s<Dirty>%s</Dirty>\n", indent, 2352 vol->v_dirty ? "Yes" : "No"); 2353 sbuf_printf(sb, "%s<Subdisks>", indent); 2354 for (i = 0; i < vol->v_disks_count; i++) { 2355 sd = &vol->v_subdisks[i]; 2356 if (sd->sd_disk != NULL && 2357 sd->sd_disk->d_consumer != NULL) { 2358 sbuf_printf(sb, "%s ", 2359 g_raid_get_diskname(sd->sd_disk)); 2360 } else { 2361 sbuf_printf(sb, "NONE "); 2362 } 2363 sbuf_printf(sb, "(%s", 2364 g_raid_subdisk_state2str(sd->sd_state)); 2365 if (sd->sd_state == G_RAID_SUBDISK_S_REBUILD || 2366 sd->sd_state == G_RAID_SUBDISK_S_RESYNC) { 2367 sbuf_printf(sb, " %d%%", 2368 (int)(sd->sd_rebuild_pos * 100 / 2369 sd->sd_size)); 2370 } 2371 sbuf_printf(sb, ")"); 2372 if (i + 1 < vol->v_disks_count) 2373 sbuf_printf(sb, ", "); 2374 } 2375 sbuf_printf(sb, "</Subdisks>\n"); 2376 sx_xunlock(&sc->sc_lock); 2377 g_topology_lock(); 2378 } else if (cp != NULL) { 2379 disk = cp->private; 2380 if (disk == NULL) 2381 return; 2382 g_topology_unlock(); 2383 sx_xlock(&sc->sc_lock); 2384 sbuf_printf(sb, "%s<State>%s", indent, 2385 g_raid_disk_state2str(disk->d_state)); 2386 if (!TAILQ_EMPTY(&disk->d_subdisks)) { 2387 sbuf_printf(sb, " ("); 2388 TAILQ_FOREACH(sd, &disk->d_subdisks, sd_next) { 2389 sbuf_printf(sb, "%s", 2390 g_raid_subdisk_state2str(sd->sd_state)); 2391 if (sd->sd_state == G_RAID_SUBDISK_S_REBUILD || 2392 sd->sd_state == G_RAID_SUBDISK_S_RESYNC) { 2393 sbuf_printf(sb, " %d%%", 2394 (int)(sd->sd_rebuild_pos * 100 / 2395 sd->sd_size)); 2396 } 2397 if (TAILQ_NEXT(sd, sd_next)) 2398 sbuf_printf(sb, ", "); 2399 } 2400 sbuf_printf(sb, ")"); 2401 } 2402 sbuf_printf(sb, "</State>\n"); 2403 sbuf_printf(sb, "%s<Subdisks>", indent); 2404 TAILQ_FOREACH(sd, &disk->d_subdisks, sd_next) { 2405 sbuf_printf(sb, "r%d(%s):%d@%ju", 2406 sd->sd_volume->v_global_id, 2407 sd->sd_volume->v_name, 2408 sd->sd_pos, sd->sd_offset); 2409 if (TAILQ_NEXT(sd, sd_next)) 2410 sbuf_printf(sb, ", "); 2411 } 2412 sbuf_printf(sb, "</Subdisks>\n"); 2413 sbuf_printf(sb, "%s<ReadErrors>%d</ReadErrors>\n", indent, 2414 disk->d_read_errs); 2415 sx_xunlock(&sc->sc_lock); 2416 g_topology_lock(); 2417 } else { 2418 g_topology_unlock(); 2419 sx_xlock(&sc->sc_lock); 2420 if (sc->sc_md) { 2421 sbuf_printf(sb, "%s<Metadata>%s</Metadata>\n", indent, 2422 sc->sc_md->mdo_class->name); 2423 } 2424 if (!TAILQ_EMPTY(&sc->sc_volumes)) { 2425 s = 0xff; 2426 TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) { 2427 if (vol->v_state < s) 2428 s = vol->v_state; 2429 } 2430 sbuf_printf(sb, "%s<State>%s</State>\n", indent, 2431 g_raid_volume_state2str(s)); 2432 } 2433 sx_xunlock(&sc->sc_lock); 2434 g_topology_lock(); 2435 } 2436 } 2437 2438 static void 2439 g_raid_shutdown_post_sync(void *arg, int howto) 2440 { 2441 struct g_class *mp; 2442 struct g_geom *gp, *gp2; 2443 struct g_raid_softc *sc; 2444 struct g_raid_volume *vol; 2445 int error; 2446 2447 mp = arg; 2448 DROP_GIANT(); 2449 g_topology_lock(); 2450 g_raid_shutdown = 1; 2451 LIST_FOREACH_SAFE(gp, &mp->geom, geom, gp2) { 2452 if ((sc = gp->softc) == NULL) 2453 continue; 2454 g_topology_unlock(); 2455 sx_xlock(&sc->sc_lock); 2456 TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) 2457 g_raid_clean(vol, -1); 2458 g_cancel_event(sc); 2459 error = g_raid_destroy(sc, G_RAID_DESTROY_DELAYED); 2460 if (error != 0) 2461 sx_xunlock(&sc->sc_lock); 2462 g_topology_lock(); 2463 } 2464 g_topology_unlock(); 2465 PICKUP_GIANT(); 2466 } 2467 2468 static void 2469 g_raid_init(struct g_class *mp) 2470 { 2471 2472 g_raid_post_sync = EVENTHANDLER_REGISTER(shutdown_post_sync, 2473 g_raid_shutdown_post_sync, mp, SHUTDOWN_PRI_FIRST); 2474 if (g_raid_post_sync == NULL) 2475 G_RAID_DEBUG(0, "Warning! Cannot register shutdown event."); 2476 g_raid_started = 1; 2477 } 2478 2479 static void 2480 g_raid_fini(struct g_class *mp) 2481 { 2482 2483 if (g_raid_post_sync != NULL) 2484 EVENTHANDLER_DEREGISTER(shutdown_post_sync, g_raid_post_sync); 2485 g_raid_started = 0; 2486 } 2487 2488 int 2489 g_raid_md_modevent(module_t mod, int type, void *arg) 2490 { 2491 struct g_raid_md_class *class, *c, *nc; 2492 int error; 2493 2494 error = 0; 2495 class = arg; 2496 switch (type) { 2497 case MOD_LOAD: 2498 c = LIST_FIRST(&g_raid_md_classes); 2499 if (c == NULL || c->mdc_priority > class->mdc_priority) 2500 LIST_INSERT_HEAD(&g_raid_md_classes, class, mdc_list); 2501 else { 2502 while ((nc = LIST_NEXT(c, mdc_list)) != NULL && 2503 nc->mdc_priority < class->mdc_priority) 2504 c = nc; 2505 LIST_INSERT_AFTER(c, class, mdc_list); 2506 } 2507 if (g_raid_started) 2508 g_retaste(&g_raid_class); 2509 break; 2510 case MOD_UNLOAD: 2511 LIST_REMOVE(class, mdc_list); 2512 break; 2513 default: 2514 error = EOPNOTSUPP; 2515 break; 2516 } 2517 2518 return (error); 2519 } 2520 2521 int 2522 g_raid_tr_modevent(module_t mod, int type, void *arg) 2523 { 2524 struct g_raid_tr_class *class, *c, *nc; 2525 int error; 2526 2527 error = 0; 2528 class = arg; 2529 switch (type) { 2530 case MOD_LOAD: 2531 c = LIST_FIRST(&g_raid_tr_classes); 2532 if (c == NULL || c->trc_priority > class->trc_priority) 2533 LIST_INSERT_HEAD(&g_raid_tr_classes, class, trc_list); 2534 else { 2535 while ((nc = LIST_NEXT(c, trc_list)) != NULL && 2536 nc->trc_priority < class->trc_priority) 2537 c = nc; 2538 LIST_INSERT_AFTER(c, class, trc_list); 2539 } 2540 break; 2541 case MOD_UNLOAD: 2542 LIST_REMOVE(class, trc_list); 2543 break; 2544 default: 2545 error = EOPNOTSUPP; 2546 break; 2547 } 2548 2549 return (error); 2550 } 2551 2552 /* 2553 * Use local implementation of DECLARE_GEOM_CLASS(g_raid_class, g_raid) 2554 * to reduce module priority, allowing submodules to register them first. 2555 */ 2556 static moduledata_t g_raid_mod = { 2557 "g_raid", 2558 g_modevent, 2559 &g_raid_class 2560 }; 2561 DECLARE_MODULE(g_raid, g_raid_mod, SI_SUB_DRIVERS, SI_ORDER_THIRD); 2562 MODULE_VERSION(geom_raid, 0);
Cache object: ee9faf97db661eefc5363f4dac383640
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