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/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 static u_int ar_legacy_aliases = 1; 96 SYSCTL_INT(_kern_geom_raid, OID_AUTO, legacy_aliases, CTLFLAG_RW, 97 &ar_legacy_aliases, 0, "Create aliases named as the legacy ataraid style."); 98 TUNABLE_INT("kern.geom_raid.legacy_aliases", &ar_legacy_aliases); 99 100 101 #define MSLEEP(rv, ident, mtx, priority, wmesg, timeout) do { \ 102 G_RAID_DEBUG(4, "%s: Sleeping %p.", __func__, (ident)); \ 103 rv = msleep((ident), (mtx), (priority), (wmesg), (timeout)); \ 104 G_RAID_DEBUG(4, "%s: Woken up %p.", __func__, (ident)); \ 105 } while (0) 106 107 LIST_HEAD(, g_raid_md_class) g_raid_md_classes = 108 LIST_HEAD_INITIALIZER(g_raid_md_classes); 109 110 LIST_HEAD(, g_raid_tr_class) g_raid_tr_classes = 111 LIST_HEAD_INITIALIZER(g_raid_tr_classes); 112 113 LIST_HEAD(, g_raid_volume) g_raid_volumes = 114 LIST_HEAD_INITIALIZER(g_raid_volumes); 115 116 static eventhandler_tag g_raid_post_sync = NULL; 117 static int g_raid_started = 0; 118 static int g_raid_shutdown = 0; 119 120 static int g_raid_destroy_geom(struct gctl_req *req, struct g_class *mp, 121 struct g_geom *gp); 122 static g_taste_t g_raid_taste; 123 static void g_raid_init(struct g_class *mp); 124 static void g_raid_fini(struct g_class *mp); 125 126 struct g_class g_raid_class = { 127 .name = G_RAID_CLASS_NAME, 128 .version = G_VERSION, 129 .ctlreq = g_raid_ctl, 130 .taste = g_raid_taste, 131 .destroy_geom = g_raid_destroy_geom, 132 .init = g_raid_init, 133 .fini = g_raid_fini 134 }; 135 136 static void g_raid_destroy_provider(struct g_raid_volume *vol); 137 static int g_raid_update_disk(struct g_raid_disk *disk, u_int event); 138 static int g_raid_update_subdisk(struct g_raid_subdisk *subdisk, u_int event); 139 static int g_raid_update_volume(struct g_raid_volume *vol, u_int event); 140 static int g_raid_update_node(struct g_raid_softc *sc, u_int event); 141 static void g_raid_dumpconf(struct sbuf *sb, const char *indent, 142 struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp); 143 static void g_raid_start(struct bio *bp); 144 static void g_raid_start_request(struct bio *bp); 145 static void g_raid_disk_done(struct bio *bp); 146 static void g_raid_poll(struct g_raid_softc *sc); 147 148 static const char * 149 g_raid_node_event2str(int event) 150 { 151 152 switch (event) { 153 case G_RAID_NODE_E_WAKE: 154 return ("WAKE"); 155 case G_RAID_NODE_E_START: 156 return ("START"); 157 default: 158 return ("INVALID"); 159 } 160 } 161 162 const char * 163 g_raid_disk_state2str(int state) 164 { 165 166 switch (state) { 167 case G_RAID_DISK_S_NONE: 168 return ("NONE"); 169 case G_RAID_DISK_S_OFFLINE: 170 return ("OFFLINE"); 171 case G_RAID_DISK_S_DISABLED: 172 return ("DISABLED"); 173 case G_RAID_DISK_S_FAILED: 174 return ("FAILED"); 175 case G_RAID_DISK_S_STALE_FAILED: 176 return ("STALE_FAILED"); 177 case G_RAID_DISK_S_SPARE: 178 return ("SPARE"); 179 case G_RAID_DISK_S_STALE: 180 return ("STALE"); 181 case G_RAID_DISK_S_ACTIVE: 182 return ("ACTIVE"); 183 default: 184 return ("INVALID"); 185 } 186 } 187 188 static const char * 189 g_raid_disk_event2str(int event) 190 { 191 192 switch (event) { 193 case G_RAID_DISK_E_DISCONNECTED: 194 return ("DISCONNECTED"); 195 default: 196 return ("INVALID"); 197 } 198 } 199 200 const char * 201 g_raid_subdisk_state2str(int state) 202 { 203 204 switch (state) { 205 case G_RAID_SUBDISK_S_NONE: 206 return ("NONE"); 207 case G_RAID_SUBDISK_S_FAILED: 208 return ("FAILED"); 209 case G_RAID_SUBDISK_S_NEW: 210 return ("NEW"); 211 case G_RAID_SUBDISK_S_REBUILD: 212 return ("REBUILD"); 213 case G_RAID_SUBDISK_S_UNINITIALIZED: 214 return ("UNINITIALIZED"); 215 case G_RAID_SUBDISK_S_STALE: 216 return ("STALE"); 217 case G_RAID_SUBDISK_S_RESYNC: 218 return ("RESYNC"); 219 case G_RAID_SUBDISK_S_ACTIVE: 220 return ("ACTIVE"); 221 default: 222 return ("INVALID"); 223 } 224 } 225 226 static const char * 227 g_raid_subdisk_event2str(int event) 228 { 229 230 switch (event) { 231 case G_RAID_SUBDISK_E_NEW: 232 return ("NEW"); 233 case G_RAID_SUBDISK_E_FAILED: 234 return ("FAILED"); 235 case G_RAID_SUBDISK_E_DISCONNECTED: 236 return ("DISCONNECTED"); 237 default: 238 return ("INVALID"); 239 } 240 } 241 242 const char * 243 g_raid_volume_state2str(int state) 244 { 245 246 switch (state) { 247 case G_RAID_VOLUME_S_STARTING: 248 return ("STARTING"); 249 case G_RAID_VOLUME_S_BROKEN: 250 return ("BROKEN"); 251 case G_RAID_VOLUME_S_DEGRADED: 252 return ("DEGRADED"); 253 case G_RAID_VOLUME_S_SUBOPTIMAL: 254 return ("SUBOPTIMAL"); 255 case G_RAID_VOLUME_S_OPTIMAL: 256 return ("OPTIMAL"); 257 case G_RAID_VOLUME_S_UNSUPPORTED: 258 return ("UNSUPPORTED"); 259 case G_RAID_VOLUME_S_STOPPED: 260 return ("STOPPED"); 261 default: 262 return ("INVALID"); 263 } 264 } 265 266 static const char * 267 g_raid_volume_event2str(int event) 268 { 269 270 switch (event) { 271 case G_RAID_VOLUME_E_UP: 272 return ("UP"); 273 case G_RAID_VOLUME_E_DOWN: 274 return ("DOWN"); 275 case G_RAID_VOLUME_E_START: 276 return ("START"); 277 case G_RAID_VOLUME_E_STARTMD: 278 return ("STARTMD"); 279 default: 280 return ("INVALID"); 281 } 282 } 283 284 const char * 285 g_raid_volume_level2str(int level, int qual) 286 { 287 288 switch (level) { 289 case G_RAID_VOLUME_RL_RAID0: 290 return ("RAID0"); 291 case G_RAID_VOLUME_RL_RAID1: 292 return ("RAID1"); 293 case G_RAID_VOLUME_RL_RAID3: 294 if (qual == G_RAID_VOLUME_RLQ_R3P0) 295 return ("RAID3-P0"); 296 if (qual == G_RAID_VOLUME_RLQ_R3PN) 297 return ("RAID3-PN"); 298 return ("RAID3"); 299 case G_RAID_VOLUME_RL_RAID4: 300 if (qual == G_RAID_VOLUME_RLQ_R4P0) 301 return ("RAID4-P0"); 302 if (qual == G_RAID_VOLUME_RLQ_R4PN) 303 return ("RAID4-PN"); 304 return ("RAID4"); 305 case G_RAID_VOLUME_RL_RAID5: 306 if (qual == G_RAID_VOLUME_RLQ_R5RA) 307 return ("RAID5-RA"); 308 if (qual == G_RAID_VOLUME_RLQ_R5RS) 309 return ("RAID5-RS"); 310 if (qual == G_RAID_VOLUME_RLQ_R5LA) 311 return ("RAID5-LA"); 312 if (qual == G_RAID_VOLUME_RLQ_R5LS) 313 return ("RAID5-LS"); 314 return ("RAID5"); 315 case G_RAID_VOLUME_RL_RAID6: 316 if (qual == G_RAID_VOLUME_RLQ_R6RA) 317 return ("RAID6-RA"); 318 if (qual == G_RAID_VOLUME_RLQ_R6RS) 319 return ("RAID6-RS"); 320 if (qual == G_RAID_VOLUME_RLQ_R6LA) 321 return ("RAID6-LA"); 322 if (qual == G_RAID_VOLUME_RLQ_R6LS) 323 return ("RAID6-LS"); 324 return ("RAID6"); 325 case G_RAID_VOLUME_RL_RAIDMDF: 326 if (qual == G_RAID_VOLUME_RLQ_RMDFRA) 327 return ("RAIDMDF-RA"); 328 if (qual == G_RAID_VOLUME_RLQ_RMDFRS) 329 return ("RAIDMDF-RS"); 330 if (qual == G_RAID_VOLUME_RLQ_RMDFLA) 331 return ("RAIDMDF-LA"); 332 if (qual == G_RAID_VOLUME_RLQ_RMDFLS) 333 return ("RAIDMDF-LS"); 334 return ("RAIDMDF"); 335 case G_RAID_VOLUME_RL_RAID1E: 336 if (qual == G_RAID_VOLUME_RLQ_R1EA) 337 return ("RAID1E-A"); 338 if (qual == G_RAID_VOLUME_RLQ_R1EO) 339 return ("RAID1E-O"); 340 return ("RAID1E"); 341 case G_RAID_VOLUME_RL_SINGLE: 342 return ("SINGLE"); 343 case G_RAID_VOLUME_RL_CONCAT: 344 return ("CONCAT"); 345 case G_RAID_VOLUME_RL_RAID5E: 346 if (qual == G_RAID_VOLUME_RLQ_R5ERA) 347 return ("RAID5E-RA"); 348 if (qual == G_RAID_VOLUME_RLQ_R5ERS) 349 return ("RAID5E-RS"); 350 if (qual == G_RAID_VOLUME_RLQ_R5ELA) 351 return ("RAID5E-LA"); 352 if (qual == G_RAID_VOLUME_RLQ_R5ELS) 353 return ("RAID5E-LS"); 354 return ("RAID5E"); 355 case G_RAID_VOLUME_RL_RAID5EE: 356 if (qual == G_RAID_VOLUME_RLQ_R5EERA) 357 return ("RAID5EE-RA"); 358 if (qual == G_RAID_VOLUME_RLQ_R5EERS) 359 return ("RAID5EE-RS"); 360 if (qual == G_RAID_VOLUME_RLQ_R5EELA) 361 return ("RAID5EE-LA"); 362 if (qual == G_RAID_VOLUME_RLQ_R5EELS) 363 return ("RAID5EE-LS"); 364 return ("RAID5EE"); 365 case G_RAID_VOLUME_RL_RAID5R: 366 if (qual == G_RAID_VOLUME_RLQ_R5RRA) 367 return ("RAID5R-RA"); 368 if (qual == G_RAID_VOLUME_RLQ_R5RRS) 369 return ("RAID5R-RS"); 370 if (qual == G_RAID_VOLUME_RLQ_R5RLA) 371 return ("RAID5R-LA"); 372 if (qual == G_RAID_VOLUME_RLQ_R5RLS) 373 return ("RAID5R-LS"); 374 return ("RAID5E"); 375 default: 376 return ("UNKNOWN"); 377 } 378 } 379 380 int 381 g_raid_volume_str2level(const char *str, int *level, int *qual) 382 { 383 384 *level = G_RAID_VOLUME_RL_UNKNOWN; 385 *qual = G_RAID_VOLUME_RLQ_NONE; 386 if (strcasecmp(str, "RAID0") == 0) 387 *level = G_RAID_VOLUME_RL_RAID0; 388 else if (strcasecmp(str, "RAID1") == 0) 389 *level = G_RAID_VOLUME_RL_RAID1; 390 else if (strcasecmp(str, "RAID3-P0") == 0) { 391 *level = G_RAID_VOLUME_RL_RAID3; 392 *qual = G_RAID_VOLUME_RLQ_R3P0; 393 } else if (strcasecmp(str, "RAID3-PN") == 0 || 394 strcasecmp(str, "RAID3") == 0) { 395 *level = G_RAID_VOLUME_RL_RAID3; 396 *qual = G_RAID_VOLUME_RLQ_R3PN; 397 } else if (strcasecmp(str, "RAID4-P0") == 0) { 398 *level = G_RAID_VOLUME_RL_RAID4; 399 *qual = G_RAID_VOLUME_RLQ_R4P0; 400 } else if (strcasecmp(str, "RAID4-PN") == 0 || 401 strcasecmp(str, "RAID4") == 0) { 402 *level = G_RAID_VOLUME_RL_RAID4; 403 *qual = G_RAID_VOLUME_RLQ_R4PN; 404 } else if (strcasecmp(str, "RAID5-RA") == 0) { 405 *level = G_RAID_VOLUME_RL_RAID5; 406 *qual = G_RAID_VOLUME_RLQ_R5RA; 407 } else if (strcasecmp(str, "RAID5-RS") == 0) { 408 *level = G_RAID_VOLUME_RL_RAID5; 409 *qual = G_RAID_VOLUME_RLQ_R5RS; 410 } else if (strcasecmp(str, "RAID5") == 0 || 411 strcasecmp(str, "RAID5-LA") == 0) { 412 *level = G_RAID_VOLUME_RL_RAID5; 413 *qual = G_RAID_VOLUME_RLQ_R5LA; 414 } else if (strcasecmp(str, "RAID5-LS") == 0) { 415 *level = G_RAID_VOLUME_RL_RAID5; 416 *qual = G_RAID_VOLUME_RLQ_R5LS; 417 } else if (strcasecmp(str, "RAID6-RA") == 0) { 418 *level = G_RAID_VOLUME_RL_RAID6; 419 *qual = G_RAID_VOLUME_RLQ_R6RA; 420 } else if (strcasecmp(str, "RAID6-RS") == 0) { 421 *level = G_RAID_VOLUME_RL_RAID6; 422 *qual = G_RAID_VOLUME_RLQ_R6RS; 423 } else if (strcasecmp(str, "RAID6") == 0 || 424 strcasecmp(str, "RAID6-LA") == 0) { 425 *level = G_RAID_VOLUME_RL_RAID6; 426 *qual = G_RAID_VOLUME_RLQ_R6LA; 427 } else if (strcasecmp(str, "RAID6-LS") == 0) { 428 *level = G_RAID_VOLUME_RL_RAID6; 429 *qual = G_RAID_VOLUME_RLQ_R6LS; 430 } else if (strcasecmp(str, "RAIDMDF-RA") == 0) { 431 *level = G_RAID_VOLUME_RL_RAIDMDF; 432 *qual = G_RAID_VOLUME_RLQ_RMDFRA; 433 } else if (strcasecmp(str, "RAIDMDF-RS") == 0) { 434 *level = G_RAID_VOLUME_RL_RAIDMDF; 435 *qual = G_RAID_VOLUME_RLQ_RMDFRS; 436 } else if (strcasecmp(str, "RAIDMDF") == 0 || 437 strcasecmp(str, "RAIDMDF-LA") == 0) { 438 *level = G_RAID_VOLUME_RL_RAIDMDF; 439 *qual = G_RAID_VOLUME_RLQ_RMDFLA; 440 } else if (strcasecmp(str, "RAIDMDF-LS") == 0) { 441 *level = G_RAID_VOLUME_RL_RAIDMDF; 442 *qual = G_RAID_VOLUME_RLQ_RMDFLS; 443 } else if (strcasecmp(str, "RAID10") == 0 || 444 strcasecmp(str, "RAID1E") == 0 || 445 strcasecmp(str, "RAID1E-A") == 0) { 446 *level = G_RAID_VOLUME_RL_RAID1E; 447 *qual = G_RAID_VOLUME_RLQ_R1EA; 448 } else if (strcasecmp(str, "RAID1E-O") == 0) { 449 *level = G_RAID_VOLUME_RL_RAID1E; 450 *qual = G_RAID_VOLUME_RLQ_R1EO; 451 } else if (strcasecmp(str, "SINGLE") == 0) 452 *level = G_RAID_VOLUME_RL_SINGLE; 453 else if (strcasecmp(str, "CONCAT") == 0) 454 *level = G_RAID_VOLUME_RL_CONCAT; 455 else if (strcasecmp(str, "RAID5E-RA") == 0) { 456 *level = G_RAID_VOLUME_RL_RAID5E; 457 *qual = G_RAID_VOLUME_RLQ_R5ERA; 458 } else if (strcasecmp(str, "RAID5E-RS") == 0) { 459 *level = G_RAID_VOLUME_RL_RAID5E; 460 *qual = G_RAID_VOLUME_RLQ_R5ERS; 461 } else if (strcasecmp(str, "RAID5E") == 0 || 462 strcasecmp(str, "RAID5E-LA") == 0) { 463 *level = G_RAID_VOLUME_RL_RAID5E; 464 *qual = G_RAID_VOLUME_RLQ_R5ELA; 465 } else if (strcasecmp(str, "RAID5E-LS") == 0) { 466 *level = G_RAID_VOLUME_RL_RAID5E; 467 *qual = G_RAID_VOLUME_RLQ_R5ELS; 468 } else if (strcasecmp(str, "RAID5EE-RA") == 0) { 469 *level = G_RAID_VOLUME_RL_RAID5EE; 470 *qual = G_RAID_VOLUME_RLQ_R5EERA; 471 } else if (strcasecmp(str, "RAID5EE-RS") == 0) { 472 *level = G_RAID_VOLUME_RL_RAID5EE; 473 *qual = G_RAID_VOLUME_RLQ_R5EERS; 474 } else if (strcasecmp(str, "RAID5EE") == 0 || 475 strcasecmp(str, "RAID5EE-LA") == 0) { 476 *level = G_RAID_VOLUME_RL_RAID5EE; 477 *qual = G_RAID_VOLUME_RLQ_R5EELA; 478 } else if (strcasecmp(str, "RAID5EE-LS") == 0) { 479 *level = G_RAID_VOLUME_RL_RAID5EE; 480 *qual = G_RAID_VOLUME_RLQ_R5EELS; 481 } else if (strcasecmp(str, "RAID5R-RA") == 0) { 482 *level = G_RAID_VOLUME_RL_RAID5R; 483 *qual = G_RAID_VOLUME_RLQ_R5RRA; 484 } else if (strcasecmp(str, "RAID5R-RS") == 0) { 485 *level = G_RAID_VOLUME_RL_RAID5R; 486 *qual = G_RAID_VOLUME_RLQ_R5RRS; 487 } else if (strcasecmp(str, "RAID5R") == 0 || 488 strcasecmp(str, "RAID5R-LA") == 0) { 489 *level = G_RAID_VOLUME_RL_RAID5R; 490 *qual = G_RAID_VOLUME_RLQ_R5RLA; 491 } else if (strcasecmp(str, "RAID5R-LS") == 0) { 492 *level = G_RAID_VOLUME_RL_RAID5R; 493 *qual = G_RAID_VOLUME_RLQ_R5RLS; 494 } else 495 return (-1); 496 return (0); 497 } 498 499 const char * 500 g_raid_get_diskname(struct g_raid_disk *disk) 501 { 502 503 if (disk->d_consumer == NULL || disk->d_consumer->provider == NULL) 504 return ("[unknown]"); 505 return (disk->d_consumer->provider->name); 506 } 507 508 void 509 g_raid_get_disk_info(struct g_raid_disk *disk) 510 { 511 struct g_consumer *cp = disk->d_consumer; 512 int error, len; 513 514 /* Read kernel dumping information. */ 515 disk->d_kd.offset = 0; 516 disk->d_kd.length = OFF_MAX; 517 len = sizeof(disk->d_kd); 518 error = g_io_getattr("GEOM::kerneldump", cp, &len, &disk->d_kd); 519 if (error) 520 disk->d_kd.di.dumper = NULL; 521 if (disk->d_kd.di.dumper == NULL) 522 G_RAID_DEBUG1(2, disk->d_softc, 523 "Dumping not supported by %s: %d.", 524 cp->provider->name, error); 525 526 /* Read BIO_DELETE support. */ 527 error = g_getattr("GEOM::candelete", cp, &disk->d_candelete); 528 if (error) 529 disk->d_candelete = 0; 530 if (!disk->d_candelete) 531 G_RAID_DEBUG1(2, disk->d_softc, 532 "BIO_DELETE not supported by %s: %d.", 533 cp->provider->name, error); 534 } 535 536 void 537 g_raid_report_disk_state(struct g_raid_disk *disk) 538 { 539 struct g_raid_subdisk *sd; 540 int len, state; 541 uint32_t s; 542 543 if (disk->d_consumer == NULL) 544 return; 545 if (disk->d_state == G_RAID_DISK_S_DISABLED) { 546 s = G_STATE_ACTIVE; /* XXX */ 547 } else if (disk->d_state == G_RAID_DISK_S_FAILED || 548 disk->d_state == G_RAID_DISK_S_STALE_FAILED) { 549 s = G_STATE_FAILED; 550 } else { 551 state = G_RAID_SUBDISK_S_ACTIVE; 552 TAILQ_FOREACH(sd, &disk->d_subdisks, sd_next) { 553 if (sd->sd_state < state) 554 state = sd->sd_state; 555 } 556 if (state == G_RAID_SUBDISK_S_FAILED) 557 s = G_STATE_FAILED; 558 else if (state == G_RAID_SUBDISK_S_NEW || 559 state == G_RAID_SUBDISK_S_REBUILD) 560 s = G_STATE_REBUILD; 561 else if (state == G_RAID_SUBDISK_S_STALE || 562 state == G_RAID_SUBDISK_S_RESYNC) 563 s = G_STATE_RESYNC; 564 else 565 s = G_STATE_ACTIVE; 566 } 567 len = sizeof(s); 568 g_io_getattr("GEOM::setstate", disk->d_consumer, &len, &s); 569 G_RAID_DEBUG1(2, disk->d_softc, "Disk %s state reported as %d.", 570 g_raid_get_diskname(disk), s); 571 } 572 573 void 574 g_raid_change_disk_state(struct g_raid_disk *disk, int state) 575 { 576 577 G_RAID_DEBUG1(0, disk->d_softc, "Disk %s state changed from %s to %s.", 578 g_raid_get_diskname(disk), 579 g_raid_disk_state2str(disk->d_state), 580 g_raid_disk_state2str(state)); 581 disk->d_state = state; 582 g_raid_report_disk_state(disk); 583 } 584 585 void 586 g_raid_change_subdisk_state(struct g_raid_subdisk *sd, int state) 587 { 588 589 G_RAID_DEBUG1(0, sd->sd_softc, 590 "Subdisk %s:%d-%s state changed from %s to %s.", 591 sd->sd_volume->v_name, sd->sd_pos, 592 sd->sd_disk ? g_raid_get_diskname(sd->sd_disk) : "[none]", 593 g_raid_subdisk_state2str(sd->sd_state), 594 g_raid_subdisk_state2str(state)); 595 sd->sd_state = state; 596 if (sd->sd_disk) 597 g_raid_report_disk_state(sd->sd_disk); 598 } 599 600 void 601 g_raid_change_volume_state(struct g_raid_volume *vol, int state) 602 { 603 604 G_RAID_DEBUG1(0, vol->v_softc, 605 "Volume %s state changed from %s to %s.", 606 vol->v_name, 607 g_raid_volume_state2str(vol->v_state), 608 g_raid_volume_state2str(state)); 609 vol->v_state = state; 610 } 611 612 /* 613 * --- Events handling functions --- 614 * Events in geom_raid are used to maintain subdisks and volumes status 615 * from one thread to simplify locking. 616 */ 617 static void 618 g_raid_event_free(struct g_raid_event *ep) 619 { 620 621 free(ep, M_RAID); 622 } 623 624 int 625 g_raid_event_send(void *arg, int event, int flags) 626 { 627 struct g_raid_softc *sc; 628 struct g_raid_event *ep; 629 int error; 630 631 if ((flags & G_RAID_EVENT_VOLUME) != 0) { 632 sc = ((struct g_raid_volume *)arg)->v_softc; 633 } else if ((flags & G_RAID_EVENT_DISK) != 0) { 634 sc = ((struct g_raid_disk *)arg)->d_softc; 635 } else if ((flags & G_RAID_EVENT_SUBDISK) != 0) { 636 sc = ((struct g_raid_subdisk *)arg)->sd_softc; 637 } else { 638 sc = arg; 639 } 640 ep = malloc(sizeof(*ep), M_RAID, 641 sx_xlocked(&sc->sc_lock) ? M_WAITOK : M_NOWAIT); 642 if (ep == NULL) 643 return (ENOMEM); 644 ep->e_tgt = arg; 645 ep->e_event = event; 646 ep->e_flags = flags; 647 ep->e_error = 0; 648 G_RAID_DEBUG1(4, sc, "Sending event %p. Waking up %p.", ep, sc); 649 mtx_lock(&sc->sc_queue_mtx); 650 TAILQ_INSERT_TAIL(&sc->sc_events, ep, e_next); 651 mtx_unlock(&sc->sc_queue_mtx); 652 wakeup(sc); 653 654 if ((flags & G_RAID_EVENT_WAIT) == 0) 655 return (0); 656 657 sx_assert(&sc->sc_lock, SX_XLOCKED); 658 G_RAID_DEBUG1(4, sc, "Sleeping on %p.", ep); 659 sx_xunlock(&sc->sc_lock); 660 while ((ep->e_flags & G_RAID_EVENT_DONE) == 0) { 661 mtx_lock(&sc->sc_queue_mtx); 662 MSLEEP(error, ep, &sc->sc_queue_mtx, PRIBIO | PDROP, "m:event", 663 hz * 5); 664 } 665 error = ep->e_error; 666 g_raid_event_free(ep); 667 sx_xlock(&sc->sc_lock); 668 return (error); 669 } 670 671 static void 672 g_raid_event_cancel(struct g_raid_softc *sc, void *tgt) 673 { 674 struct g_raid_event *ep, *tmpep; 675 676 sx_assert(&sc->sc_lock, SX_XLOCKED); 677 678 mtx_lock(&sc->sc_queue_mtx); 679 TAILQ_FOREACH_SAFE(ep, &sc->sc_events, e_next, tmpep) { 680 if (ep->e_tgt != tgt) 681 continue; 682 TAILQ_REMOVE(&sc->sc_events, ep, e_next); 683 if ((ep->e_flags & G_RAID_EVENT_WAIT) == 0) 684 g_raid_event_free(ep); 685 else { 686 ep->e_error = ECANCELED; 687 wakeup(ep); 688 } 689 } 690 mtx_unlock(&sc->sc_queue_mtx); 691 } 692 693 static int 694 g_raid_event_check(struct g_raid_softc *sc, void *tgt) 695 { 696 struct g_raid_event *ep; 697 int res = 0; 698 699 sx_assert(&sc->sc_lock, SX_XLOCKED); 700 701 mtx_lock(&sc->sc_queue_mtx); 702 TAILQ_FOREACH(ep, &sc->sc_events, e_next) { 703 if (ep->e_tgt != tgt) 704 continue; 705 res = 1; 706 break; 707 } 708 mtx_unlock(&sc->sc_queue_mtx); 709 return (res); 710 } 711 712 /* 713 * Return the number of disks in given state. 714 * If state is equal to -1, count all connected disks. 715 */ 716 u_int 717 g_raid_ndisks(struct g_raid_softc *sc, int state) 718 { 719 struct g_raid_disk *disk; 720 u_int n; 721 722 sx_assert(&sc->sc_lock, SX_LOCKED); 723 724 n = 0; 725 TAILQ_FOREACH(disk, &sc->sc_disks, d_next) { 726 if (disk->d_state == state || state == -1) 727 n++; 728 } 729 return (n); 730 } 731 732 /* 733 * Return the number of subdisks in given state. 734 * If state is equal to -1, count all connected disks. 735 */ 736 u_int 737 g_raid_nsubdisks(struct g_raid_volume *vol, int state) 738 { 739 struct g_raid_subdisk *subdisk; 740 struct g_raid_softc *sc; 741 u_int i, n ; 742 743 sc = vol->v_softc; 744 sx_assert(&sc->sc_lock, SX_LOCKED); 745 746 n = 0; 747 for (i = 0; i < vol->v_disks_count; i++) { 748 subdisk = &vol->v_subdisks[i]; 749 if ((state == -1 && 750 subdisk->sd_state != G_RAID_SUBDISK_S_NONE) || 751 subdisk->sd_state == state) 752 n++; 753 } 754 return (n); 755 } 756 757 /* 758 * Return the first subdisk in given state. 759 * If state is equal to -1, then the first connected disks. 760 */ 761 struct g_raid_subdisk * 762 g_raid_get_subdisk(struct g_raid_volume *vol, int state) 763 { 764 struct g_raid_subdisk *sd; 765 struct g_raid_softc *sc; 766 u_int i; 767 768 sc = vol->v_softc; 769 sx_assert(&sc->sc_lock, SX_LOCKED); 770 771 for (i = 0; i < vol->v_disks_count; i++) { 772 sd = &vol->v_subdisks[i]; 773 if ((state == -1 && 774 sd->sd_state != G_RAID_SUBDISK_S_NONE) || 775 sd->sd_state == state) 776 return (sd); 777 } 778 return (NULL); 779 } 780 781 struct g_consumer * 782 g_raid_open_consumer(struct g_raid_softc *sc, const char *name) 783 { 784 struct g_consumer *cp; 785 struct g_provider *pp; 786 787 g_topology_assert(); 788 789 if (strncmp(name, "/dev/", 5) == 0) 790 name += 5; 791 pp = g_provider_by_name(name); 792 if (pp == NULL) 793 return (NULL); 794 cp = g_new_consumer(sc->sc_geom); 795 if (g_attach(cp, pp) != 0) { 796 g_destroy_consumer(cp); 797 return (NULL); 798 } 799 if (g_access(cp, 1, 1, 1) != 0) { 800 g_detach(cp); 801 g_destroy_consumer(cp); 802 return (NULL); 803 } 804 return (cp); 805 } 806 807 static u_int 808 g_raid_nrequests(struct g_raid_softc *sc, struct g_consumer *cp) 809 { 810 struct bio *bp; 811 u_int nreqs = 0; 812 813 mtx_lock(&sc->sc_queue_mtx); 814 TAILQ_FOREACH(bp, &sc->sc_queue.queue, bio_queue) { 815 if (bp->bio_from == cp) 816 nreqs++; 817 } 818 mtx_unlock(&sc->sc_queue_mtx); 819 return (nreqs); 820 } 821 822 u_int 823 g_raid_nopens(struct g_raid_softc *sc) 824 { 825 struct g_raid_volume *vol; 826 u_int opens; 827 828 opens = 0; 829 TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) { 830 if (vol->v_provider_open != 0) 831 opens++; 832 } 833 return (opens); 834 } 835 836 static int 837 g_raid_consumer_is_busy(struct g_raid_softc *sc, struct g_consumer *cp) 838 { 839 840 if (cp->index > 0) { 841 G_RAID_DEBUG1(2, sc, 842 "I/O requests for %s exist, can't destroy it now.", 843 cp->provider->name); 844 return (1); 845 } 846 if (g_raid_nrequests(sc, cp) > 0) { 847 G_RAID_DEBUG1(2, sc, 848 "I/O requests for %s in queue, can't destroy it now.", 849 cp->provider->name); 850 return (1); 851 } 852 return (0); 853 } 854 855 static void 856 g_raid_destroy_consumer(void *arg, int flags __unused) 857 { 858 struct g_consumer *cp; 859 860 g_topology_assert(); 861 862 cp = arg; 863 G_RAID_DEBUG(1, "Consumer %s destroyed.", cp->provider->name); 864 g_detach(cp); 865 g_destroy_consumer(cp); 866 } 867 868 void 869 g_raid_kill_consumer(struct g_raid_softc *sc, struct g_consumer *cp) 870 { 871 struct g_provider *pp; 872 int retaste_wait; 873 874 g_topology_assert_not(); 875 876 g_topology_lock(); 877 cp->private = NULL; 878 if (g_raid_consumer_is_busy(sc, cp)) 879 goto out; 880 pp = cp->provider; 881 retaste_wait = 0; 882 if (cp->acw == 1) { 883 if ((pp->geom->flags & G_GEOM_WITHER) == 0) 884 retaste_wait = 1; 885 } 886 if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0) 887 g_access(cp, -cp->acr, -cp->acw, -cp->ace); 888 if (retaste_wait) { 889 /* 890 * After retaste event was send (inside g_access()), we can send 891 * event to detach and destroy consumer. 892 * A class, which has consumer to the given provider connected 893 * will not receive retaste event for the provider. 894 * This is the way how I ignore retaste events when I close 895 * consumers opened for write: I detach and destroy consumer 896 * after retaste event is sent. 897 */ 898 g_post_event(g_raid_destroy_consumer, cp, M_WAITOK, NULL); 899 goto out; 900 } 901 G_RAID_DEBUG(1, "Consumer %s destroyed.", pp->name); 902 g_detach(cp); 903 g_destroy_consumer(cp); 904 out: 905 g_topology_unlock(); 906 } 907 908 static void 909 g_raid_orphan(struct g_consumer *cp) 910 { 911 struct g_raid_disk *disk; 912 913 g_topology_assert(); 914 915 disk = cp->private; 916 if (disk == NULL) 917 return; 918 g_raid_event_send(disk, G_RAID_DISK_E_DISCONNECTED, 919 G_RAID_EVENT_DISK); 920 } 921 922 static void 923 g_raid_clean(struct g_raid_volume *vol, int acw) 924 { 925 struct g_raid_softc *sc; 926 int timeout; 927 928 sc = vol->v_softc; 929 g_topology_assert_not(); 930 sx_assert(&sc->sc_lock, SX_XLOCKED); 931 932 // if ((sc->sc_flags & G_RAID_DEVICE_FLAG_NOFAILSYNC) != 0) 933 // return; 934 if (!vol->v_dirty) 935 return; 936 if (vol->v_writes > 0) 937 return; 938 if (acw > 0 || (acw == -1 && 939 vol->v_provider != NULL && vol->v_provider->acw > 0)) { 940 timeout = g_raid_clean_time - (time_uptime - vol->v_last_write); 941 if (!g_raid_shutdown && timeout > 0) 942 return; 943 } 944 vol->v_dirty = 0; 945 G_RAID_DEBUG1(1, sc, "Volume %s marked as clean.", 946 vol->v_name); 947 g_raid_write_metadata(sc, vol, NULL, NULL); 948 } 949 950 static void 951 g_raid_dirty(struct g_raid_volume *vol) 952 { 953 struct g_raid_softc *sc; 954 955 sc = vol->v_softc; 956 g_topology_assert_not(); 957 sx_assert(&sc->sc_lock, SX_XLOCKED); 958 959 // if ((sc->sc_flags & G_RAID_DEVICE_FLAG_NOFAILSYNC) != 0) 960 // return; 961 vol->v_dirty = 1; 962 G_RAID_DEBUG1(1, sc, "Volume %s marked as dirty.", 963 vol->v_name); 964 g_raid_write_metadata(sc, vol, NULL, NULL); 965 } 966 967 void 968 g_raid_tr_flush_common(struct g_raid_tr_object *tr, struct bio *bp) 969 { 970 struct g_raid_softc *sc; 971 struct g_raid_volume *vol; 972 struct g_raid_subdisk *sd; 973 struct bio_queue_head queue; 974 struct bio *cbp; 975 int i; 976 977 vol = tr->tro_volume; 978 sc = vol->v_softc; 979 980 /* 981 * Allocate all bios before sending any request, so we can return 982 * ENOMEM in nice and clean way. 983 */ 984 bioq_init(&queue); 985 for (i = 0; i < vol->v_disks_count; i++) { 986 sd = &vol->v_subdisks[i]; 987 if (sd->sd_state == G_RAID_SUBDISK_S_NONE || 988 sd->sd_state == G_RAID_SUBDISK_S_FAILED) 989 continue; 990 cbp = g_clone_bio(bp); 991 if (cbp == NULL) 992 goto failure; 993 cbp->bio_caller1 = sd; 994 bioq_insert_tail(&queue, cbp); 995 } 996 while ((cbp = bioq_takefirst(&queue)) != NULL) { 997 sd = cbp->bio_caller1; 998 cbp->bio_caller1 = NULL; 999 g_raid_subdisk_iostart(sd, cbp); 1000 } 1001 return; 1002 failure: 1003 while ((cbp = bioq_takefirst(&queue)) != NULL) 1004 g_destroy_bio(cbp); 1005 if (bp->bio_error == 0) 1006 bp->bio_error = ENOMEM; 1007 g_raid_iodone(bp, bp->bio_error); 1008 } 1009 1010 static void 1011 g_raid_tr_kerneldump_common_done(struct bio *bp) 1012 { 1013 1014 bp->bio_flags |= BIO_DONE; 1015 } 1016 1017 int 1018 g_raid_tr_kerneldump_common(struct g_raid_tr_object *tr, 1019 void *virtual, vm_offset_t physical, off_t offset, size_t length) 1020 { 1021 struct g_raid_softc *sc; 1022 struct g_raid_volume *vol; 1023 struct bio bp; 1024 1025 vol = tr->tro_volume; 1026 sc = vol->v_softc; 1027 1028 bzero(&bp, sizeof(bp)); 1029 bp.bio_cmd = BIO_WRITE; 1030 bp.bio_done = g_raid_tr_kerneldump_common_done; 1031 bp.bio_attribute = NULL; 1032 bp.bio_offset = offset; 1033 bp.bio_length = length; 1034 bp.bio_data = virtual; 1035 bp.bio_to = vol->v_provider; 1036 1037 g_raid_start(&bp); 1038 while (!(bp.bio_flags & BIO_DONE)) { 1039 G_RAID_DEBUG1(4, sc, "Poll..."); 1040 g_raid_poll(sc); 1041 DELAY(10); 1042 } 1043 1044 return (bp.bio_error != 0 ? EIO : 0); 1045 } 1046 1047 static int 1048 g_raid_dump(void *arg, 1049 void *virtual, vm_offset_t physical, off_t offset, size_t length) 1050 { 1051 struct g_raid_volume *vol; 1052 int error; 1053 1054 vol = (struct g_raid_volume *)arg; 1055 G_RAID_DEBUG1(3, vol->v_softc, "Dumping at off %llu len %llu.", 1056 (long long unsigned)offset, (long long unsigned)length); 1057 1058 error = G_RAID_TR_KERNELDUMP(vol->v_tr, 1059 virtual, physical, offset, length); 1060 return (error); 1061 } 1062 1063 static void 1064 g_raid_kerneldump(struct g_raid_softc *sc, struct bio *bp) 1065 { 1066 struct g_kerneldump *gkd; 1067 struct g_provider *pp; 1068 struct g_raid_volume *vol; 1069 1070 gkd = (struct g_kerneldump*)bp->bio_data; 1071 pp = bp->bio_to; 1072 vol = pp->private; 1073 g_trace(G_T_TOPOLOGY, "g_raid_kerneldump(%s, %jd, %jd)", 1074 pp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length); 1075 gkd->di.dumper = g_raid_dump; 1076 gkd->di.priv = vol; 1077 gkd->di.blocksize = vol->v_sectorsize; 1078 gkd->di.maxiosize = DFLTPHYS; 1079 gkd->di.mediaoffset = gkd->offset; 1080 if ((gkd->offset + gkd->length) > vol->v_mediasize) 1081 gkd->length = vol->v_mediasize - gkd->offset; 1082 gkd->di.mediasize = gkd->length; 1083 g_io_deliver(bp, 0); 1084 } 1085 1086 static void 1087 g_raid_candelete(struct g_raid_softc *sc, struct bio *bp) 1088 { 1089 struct g_provider *pp; 1090 struct g_raid_volume *vol; 1091 struct g_raid_subdisk *sd; 1092 int *val; 1093 int i; 1094 1095 val = (int *)bp->bio_data; 1096 pp = bp->bio_to; 1097 vol = pp->private; 1098 *val = 0; 1099 for (i = 0; i < vol->v_disks_count; i++) { 1100 sd = &vol->v_subdisks[i]; 1101 if (sd->sd_state == G_RAID_SUBDISK_S_NONE) 1102 continue; 1103 if (sd->sd_disk->d_candelete) { 1104 *val = 1; 1105 break; 1106 } 1107 } 1108 g_io_deliver(bp, 0); 1109 } 1110 1111 static void 1112 g_raid_start(struct bio *bp) 1113 { 1114 struct g_raid_softc *sc; 1115 1116 sc = bp->bio_to->geom->softc; 1117 /* 1118 * If sc == NULL or there are no valid disks, provider's error 1119 * should be set and g_raid_start() should not be called at all. 1120 */ 1121 // KASSERT(sc != NULL && sc->sc_state == G_RAID_VOLUME_S_RUNNING, 1122 // ("Provider's error should be set (error=%d)(mirror=%s).", 1123 // bp->bio_to->error, bp->bio_to->name)); 1124 G_RAID_LOGREQ(3, bp, "Request received."); 1125 1126 switch (bp->bio_cmd) { 1127 case BIO_READ: 1128 case BIO_WRITE: 1129 case BIO_DELETE: 1130 case BIO_FLUSH: 1131 break; 1132 case BIO_GETATTR: 1133 if (!strcmp(bp->bio_attribute, "GEOM::candelete")) 1134 g_raid_candelete(sc, bp); 1135 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump")) 1136 g_raid_kerneldump(sc, bp); 1137 else 1138 g_io_deliver(bp, EOPNOTSUPP); 1139 return; 1140 default: 1141 g_io_deliver(bp, EOPNOTSUPP); 1142 return; 1143 } 1144 mtx_lock(&sc->sc_queue_mtx); 1145 bioq_insert_tail(&sc->sc_queue, bp); 1146 mtx_unlock(&sc->sc_queue_mtx); 1147 if (!dumping) { 1148 G_RAID_DEBUG1(4, sc, "Waking up %p.", sc); 1149 wakeup(sc); 1150 } 1151 } 1152 1153 static int 1154 g_raid_bio_overlaps(const struct bio *bp, off_t lstart, off_t len) 1155 { 1156 /* 1157 * 5 cases: 1158 * (1) bp entirely below NO 1159 * (2) bp entirely above NO 1160 * (3) bp start below, but end in range YES 1161 * (4) bp entirely within YES 1162 * (5) bp starts within, ends above YES 1163 * 1164 * lock range 10-19 (offset 10 length 10) 1165 * (1) 1-5: first if kicks it out 1166 * (2) 30-35: second if kicks it out 1167 * (3) 5-15: passes both ifs 1168 * (4) 12-14: passes both ifs 1169 * (5) 19-20: passes both 1170 */ 1171 off_t lend = lstart + len - 1; 1172 off_t bstart = bp->bio_offset; 1173 off_t bend = bp->bio_offset + bp->bio_length - 1; 1174 1175 if (bend < lstart) 1176 return (0); 1177 if (lend < bstart) 1178 return (0); 1179 return (1); 1180 } 1181 1182 static int 1183 g_raid_is_in_locked_range(struct g_raid_volume *vol, const struct bio *bp) 1184 { 1185 struct g_raid_lock *lp; 1186 1187 sx_assert(&vol->v_softc->sc_lock, SX_LOCKED); 1188 1189 LIST_FOREACH(lp, &vol->v_locks, l_next) { 1190 if (g_raid_bio_overlaps(bp, lp->l_offset, lp->l_length)) 1191 return (1); 1192 } 1193 return (0); 1194 } 1195 1196 static void 1197 g_raid_start_request(struct bio *bp) 1198 { 1199 struct g_raid_softc *sc; 1200 struct g_raid_volume *vol; 1201 1202 sc = bp->bio_to->geom->softc; 1203 sx_assert(&sc->sc_lock, SX_LOCKED); 1204 vol = bp->bio_to->private; 1205 1206 /* 1207 * Check to see if this item is in a locked range. If so, 1208 * queue it to our locked queue and return. We'll requeue 1209 * it when the range is unlocked. Internal I/O for the 1210 * rebuild/rescan/recovery process is excluded from this 1211 * check so we can actually do the recovery. 1212 */ 1213 if (!(bp->bio_cflags & G_RAID_BIO_FLAG_SPECIAL) && 1214 g_raid_is_in_locked_range(vol, bp)) { 1215 G_RAID_LOGREQ(3, bp, "Defer request."); 1216 bioq_insert_tail(&vol->v_locked, bp); 1217 return; 1218 } 1219 1220 /* 1221 * If we're actually going to do the write/delete, then 1222 * update the idle stats for the volume. 1223 */ 1224 if (bp->bio_cmd == BIO_WRITE || bp->bio_cmd == BIO_DELETE) { 1225 if (!vol->v_dirty) 1226 g_raid_dirty(vol); 1227 vol->v_writes++; 1228 } 1229 1230 /* 1231 * Put request onto inflight queue, so we can check if new 1232 * synchronization requests don't collide with it. Then tell 1233 * the transformation layer to start the I/O. 1234 */ 1235 bioq_insert_tail(&vol->v_inflight, bp); 1236 G_RAID_LOGREQ(4, bp, "Request started"); 1237 G_RAID_TR_IOSTART(vol->v_tr, bp); 1238 } 1239 1240 static void 1241 g_raid_finish_with_locked_ranges(struct g_raid_volume *vol, struct bio *bp) 1242 { 1243 off_t off, len; 1244 struct bio *nbp; 1245 struct g_raid_lock *lp; 1246 1247 vol->v_pending_lock = 0; 1248 LIST_FOREACH(lp, &vol->v_locks, l_next) { 1249 if (lp->l_pending) { 1250 off = lp->l_offset; 1251 len = lp->l_length; 1252 lp->l_pending = 0; 1253 TAILQ_FOREACH(nbp, &vol->v_inflight.queue, bio_queue) { 1254 if (g_raid_bio_overlaps(nbp, off, len)) 1255 lp->l_pending++; 1256 } 1257 if (lp->l_pending) { 1258 vol->v_pending_lock = 1; 1259 G_RAID_DEBUG1(4, vol->v_softc, 1260 "Deferred lock(%jd, %jd) has %d pending", 1261 (intmax_t)off, (intmax_t)(off + len), 1262 lp->l_pending); 1263 continue; 1264 } 1265 G_RAID_DEBUG1(4, vol->v_softc, 1266 "Deferred lock of %jd to %jd completed", 1267 (intmax_t)off, (intmax_t)(off + len)); 1268 G_RAID_TR_LOCKED(vol->v_tr, lp->l_callback_arg); 1269 } 1270 } 1271 } 1272 1273 void 1274 g_raid_iodone(struct bio *bp, int error) 1275 { 1276 struct g_raid_softc *sc; 1277 struct g_raid_volume *vol; 1278 1279 sc = bp->bio_to->geom->softc; 1280 sx_assert(&sc->sc_lock, SX_LOCKED); 1281 vol = bp->bio_to->private; 1282 G_RAID_LOGREQ(3, bp, "Request done: %d.", error); 1283 1284 /* Update stats if we done write/delete. */ 1285 if (bp->bio_cmd == BIO_WRITE || bp->bio_cmd == BIO_DELETE) { 1286 vol->v_writes--; 1287 vol->v_last_write = time_uptime; 1288 } 1289 1290 bioq_remove(&vol->v_inflight, bp); 1291 if (vol->v_pending_lock && g_raid_is_in_locked_range(vol, bp)) 1292 g_raid_finish_with_locked_ranges(vol, bp); 1293 getmicrouptime(&vol->v_last_done); 1294 g_io_deliver(bp, error); 1295 } 1296 1297 int 1298 g_raid_lock_range(struct g_raid_volume *vol, off_t off, off_t len, 1299 struct bio *ignore, void *argp) 1300 { 1301 struct g_raid_softc *sc; 1302 struct g_raid_lock *lp; 1303 struct bio *bp; 1304 1305 sc = vol->v_softc; 1306 lp = malloc(sizeof(*lp), M_RAID, M_WAITOK | M_ZERO); 1307 LIST_INSERT_HEAD(&vol->v_locks, lp, l_next); 1308 lp->l_offset = off; 1309 lp->l_length = len; 1310 lp->l_callback_arg = argp; 1311 1312 lp->l_pending = 0; 1313 TAILQ_FOREACH(bp, &vol->v_inflight.queue, bio_queue) { 1314 if (bp != ignore && g_raid_bio_overlaps(bp, off, len)) 1315 lp->l_pending++; 1316 } 1317 1318 /* 1319 * If there are any writes that are pending, we return EBUSY. All 1320 * callers will have to wait until all pending writes clear. 1321 */ 1322 if (lp->l_pending > 0) { 1323 vol->v_pending_lock = 1; 1324 G_RAID_DEBUG1(4, sc, "Locking range %jd to %jd deferred %d pend", 1325 (intmax_t)off, (intmax_t)(off+len), lp->l_pending); 1326 return (EBUSY); 1327 } 1328 G_RAID_DEBUG1(4, sc, "Locking range %jd to %jd", 1329 (intmax_t)off, (intmax_t)(off+len)); 1330 G_RAID_TR_LOCKED(vol->v_tr, lp->l_callback_arg); 1331 return (0); 1332 } 1333 1334 int 1335 g_raid_unlock_range(struct g_raid_volume *vol, off_t off, off_t len) 1336 { 1337 struct g_raid_lock *lp; 1338 struct g_raid_softc *sc; 1339 struct bio *bp; 1340 1341 sc = vol->v_softc; 1342 LIST_FOREACH(lp, &vol->v_locks, l_next) { 1343 if (lp->l_offset == off && lp->l_length == len) { 1344 LIST_REMOVE(lp, l_next); 1345 /* XXX 1346 * Right now we just put them all back on the queue 1347 * and hope for the best. We hope this because any 1348 * locked ranges will go right back on this list 1349 * when the worker thread runs. 1350 * XXX 1351 */ 1352 G_RAID_DEBUG1(4, sc, "Unlocked %jd to %jd", 1353 (intmax_t)lp->l_offset, 1354 (intmax_t)(lp->l_offset+lp->l_length)); 1355 mtx_lock(&sc->sc_queue_mtx); 1356 while ((bp = bioq_takefirst(&vol->v_locked)) != NULL) 1357 bioq_insert_tail(&sc->sc_queue, bp); 1358 mtx_unlock(&sc->sc_queue_mtx); 1359 free(lp, M_RAID); 1360 return (0); 1361 } 1362 } 1363 return (EINVAL); 1364 } 1365 1366 void 1367 g_raid_subdisk_iostart(struct g_raid_subdisk *sd, struct bio *bp) 1368 { 1369 struct g_consumer *cp; 1370 struct g_raid_disk *disk, *tdisk; 1371 1372 bp->bio_caller1 = sd; 1373 1374 /* 1375 * Make sure that the disk is present. Generally it is a task of 1376 * transformation layers to not send requests to absent disks, but 1377 * it is better to be safe and report situation then sorry. 1378 */ 1379 if (sd->sd_disk == NULL) { 1380 G_RAID_LOGREQ(0, bp, "Warning! I/O request to an absent disk!"); 1381 nodisk: 1382 bp->bio_from = NULL; 1383 bp->bio_to = NULL; 1384 bp->bio_error = ENXIO; 1385 g_raid_disk_done(bp); 1386 return; 1387 } 1388 disk = sd->sd_disk; 1389 if (disk->d_state != G_RAID_DISK_S_ACTIVE && 1390 disk->d_state != G_RAID_DISK_S_FAILED) { 1391 G_RAID_LOGREQ(0, bp, "Warning! I/O request to a disk in a " 1392 "wrong state (%s)!", g_raid_disk_state2str(disk->d_state)); 1393 goto nodisk; 1394 } 1395 1396 cp = disk->d_consumer; 1397 bp->bio_from = cp; 1398 bp->bio_to = cp->provider; 1399 cp->index++; 1400 1401 /* Update average disks load. */ 1402 TAILQ_FOREACH(tdisk, &sd->sd_softc->sc_disks, d_next) { 1403 if (tdisk->d_consumer == NULL) 1404 tdisk->d_load = 0; 1405 else 1406 tdisk->d_load = (tdisk->d_consumer->index * 1407 G_RAID_SUBDISK_LOAD_SCALE + tdisk->d_load * 7) / 8; 1408 } 1409 1410 disk->d_last_offset = bp->bio_offset + bp->bio_length; 1411 if (dumping) { 1412 G_RAID_LOGREQ(3, bp, "Sending dumping request."); 1413 if (bp->bio_cmd == BIO_WRITE) { 1414 bp->bio_error = g_raid_subdisk_kerneldump(sd, 1415 bp->bio_data, 0, bp->bio_offset, bp->bio_length); 1416 } else 1417 bp->bio_error = EOPNOTSUPP; 1418 g_raid_disk_done(bp); 1419 } else { 1420 bp->bio_done = g_raid_disk_done; 1421 bp->bio_offset += sd->sd_offset; 1422 G_RAID_LOGREQ(3, bp, "Sending request."); 1423 g_io_request(bp, cp); 1424 } 1425 } 1426 1427 int 1428 g_raid_subdisk_kerneldump(struct g_raid_subdisk *sd, 1429 void *virtual, vm_offset_t physical, off_t offset, size_t length) 1430 { 1431 1432 if (sd->sd_disk == NULL) 1433 return (ENXIO); 1434 if (sd->sd_disk->d_kd.di.dumper == NULL) 1435 return (EOPNOTSUPP); 1436 return (dump_write(&sd->sd_disk->d_kd.di, 1437 virtual, physical, 1438 sd->sd_disk->d_kd.di.mediaoffset + sd->sd_offset + offset, 1439 length)); 1440 } 1441 1442 static void 1443 g_raid_disk_done(struct bio *bp) 1444 { 1445 struct g_raid_softc *sc; 1446 struct g_raid_subdisk *sd; 1447 1448 sd = bp->bio_caller1; 1449 sc = sd->sd_softc; 1450 mtx_lock(&sc->sc_queue_mtx); 1451 bioq_insert_tail(&sc->sc_queue, bp); 1452 mtx_unlock(&sc->sc_queue_mtx); 1453 if (!dumping) 1454 wakeup(sc); 1455 } 1456 1457 static void 1458 g_raid_disk_done_request(struct bio *bp) 1459 { 1460 struct g_raid_softc *sc; 1461 struct g_raid_disk *disk; 1462 struct g_raid_subdisk *sd; 1463 struct g_raid_volume *vol; 1464 1465 g_topology_assert_not(); 1466 1467 G_RAID_LOGREQ(3, bp, "Disk request done: %d.", bp->bio_error); 1468 sd = bp->bio_caller1; 1469 sc = sd->sd_softc; 1470 vol = sd->sd_volume; 1471 if (bp->bio_from != NULL) { 1472 bp->bio_from->index--; 1473 disk = bp->bio_from->private; 1474 if (disk == NULL) 1475 g_raid_kill_consumer(sc, bp->bio_from); 1476 } 1477 bp->bio_offset -= sd->sd_offset; 1478 1479 G_RAID_TR_IODONE(vol->v_tr, sd, bp); 1480 } 1481 1482 static void 1483 g_raid_handle_event(struct g_raid_softc *sc, struct g_raid_event *ep) 1484 { 1485 1486 if ((ep->e_flags & G_RAID_EVENT_VOLUME) != 0) 1487 ep->e_error = g_raid_update_volume(ep->e_tgt, ep->e_event); 1488 else if ((ep->e_flags & G_RAID_EVENT_DISK) != 0) 1489 ep->e_error = g_raid_update_disk(ep->e_tgt, ep->e_event); 1490 else if ((ep->e_flags & G_RAID_EVENT_SUBDISK) != 0) 1491 ep->e_error = g_raid_update_subdisk(ep->e_tgt, ep->e_event); 1492 else 1493 ep->e_error = g_raid_update_node(ep->e_tgt, ep->e_event); 1494 if ((ep->e_flags & G_RAID_EVENT_WAIT) == 0) { 1495 KASSERT(ep->e_error == 0, 1496 ("Error cannot be handled.")); 1497 g_raid_event_free(ep); 1498 } else { 1499 ep->e_flags |= G_RAID_EVENT_DONE; 1500 G_RAID_DEBUG1(4, sc, "Waking up %p.", ep); 1501 mtx_lock(&sc->sc_queue_mtx); 1502 wakeup(ep); 1503 mtx_unlock(&sc->sc_queue_mtx); 1504 } 1505 } 1506 1507 /* 1508 * Worker thread. 1509 */ 1510 static void 1511 g_raid_worker(void *arg) 1512 { 1513 struct g_raid_softc *sc; 1514 struct g_raid_event *ep; 1515 struct g_raid_volume *vol; 1516 struct bio *bp; 1517 struct timeval now, t; 1518 int timeout, rv; 1519 1520 sc = arg; 1521 thread_lock(curthread); 1522 sched_prio(curthread, PRIBIO); 1523 thread_unlock(curthread); 1524 1525 sx_xlock(&sc->sc_lock); 1526 for (;;) { 1527 mtx_lock(&sc->sc_queue_mtx); 1528 /* 1529 * First take a look at events. 1530 * This is important to handle events before any I/O requests. 1531 */ 1532 bp = NULL; 1533 vol = NULL; 1534 rv = 0; 1535 ep = TAILQ_FIRST(&sc->sc_events); 1536 if (ep != NULL) 1537 TAILQ_REMOVE(&sc->sc_events, ep, e_next); 1538 else if ((bp = bioq_takefirst(&sc->sc_queue)) != NULL) 1539 ; 1540 else { 1541 getmicrouptime(&now); 1542 t = now; 1543 TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) { 1544 if (bioq_first(&vol->v_inflight) == NULL && 1545 vol->v_tr && 1546 timevalcmp(&vol->v_last_done, &t, < )) 1547 t = vol->v_last_done; 1548 } 1549 timevalsub(&t, &now); 1550 timeout = g_raid_idle_threshold + 1551 t.tv_sec * 1000000 + t.tv_usec; 1552 if (timeout > 0) { 1553 /* 1554 * Two steps to avoid overflows at HZ=1000 1555 * and idle timeouts > 2.1s. Some rounding 1556 * errors can occur, but they are < 1tick, 1557 * which is deemed to be close enough for 1558 * this purpose. 1559 */ 1560 int micpertic = 1000000 / hz; 1561 timeout = (timeout + micpertic - 1) / micpertic; 1562 sx_xunlock(&sc->sc_lock); 1563 MSLEEP(rv, sc, &sc->sc_queue_mtx, 1564 PRIBIO | PDROP, "-", timeout); 1565 sx_xlock(&sc->sc_lock); 1566 goto process; 1567 } else 1568 rv = EWOULDBLOCK; 1569 } 1570 mtx_unlock(&sc->sc_queue_mtx); 1571 process: 1572 if (ep != NULL) { 1573 g_raid_handle_event(sc, ep); 1574 } else if (bp != NULL) { 1575 if (bp->bio_to != NULL && 1576 bp->bio_to->geom == sc->sc_geom) 1577 g_raid_start_request(bp); 1578 else 1579 g_raid_disk_done_request(bp); 1580 } else if (rv == EWOULDBLOCK) { 1581 TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) { 1582 g_raid_clean(vol, -1); 1583 if (bioq_first(&vol->v_inflight) == NULL && 1584 vol->v_tr) { 1585 t.tv_sec = g_raid_idle_threshold / 1000000; 1586 t.tv_usec = g_raid_idle_threshold % 1000000; 1587 timevaladd(&t, &vol->v_last_done); 1588 getmicrouptime(&now); 1589 if (timevalcmp(&t, &now, <= )) { 1590 G_RAID_TR_IDLE(vol->v_tr); 1591 vol->v_last_done = now; 1592 } 1593 } 1594 } 1595 } 1596 if (sc->sc_stopping == G_RAID_DESTROY_HARD) 1597 g_raid_destroy_node(sc, 1); /* May not return. */ 1598 } 1599 } 1600 1601 static void 1602 g_raid_poll(struct g_raid_softc *sc) 1603 { 1604 struct g_raid_event *ep; 1605 struct bio *bp; 1606 1607 sx_xlock(&sc->sc_lock); 1608 mtx_lock(&sc->sc_queue_mtx); 1609 /* 1610 * First take a look at events. 1611 * This is important to handle events before any I/O requests. 1612 */ 1613 ep = TAILQ_FIRST(&sc->sc_events); 1614 if (ep != NULL) { 1615 TAILQ_REMOVE(&sc->sc_events, ep, e_next); 1616 mtx_unlock(&sc->sc_queue_mtx); 1617 g_raid_handle_event(sc, ep); 1618 goto out; 1619 } 1620 bp = bioq_takefirst(&sc->sc_queue); 1621 if (bp != NULL) { 1622 mtx_unlock(&sc->sc_queue_mtx); 1623 if (bp->bio_from == NULL || 1624 bp->bio_from->geom != sc->sc_geom) 1625 g_raid_start_request(bp); 1626 else 1627 g_raid_disk_done_request(bp); 1628 } 1629 out: 1630 sx_xunlock(&sc->sc_lock); 1631 } 1632 1633 static void 1634 g_raid_launch_provider(struct g_raid_volume *vol) 1635 { 1636 struct g_raid_disk *disk; 1637 struct g_raid_subdisk *sd; 1638 struct g_raid_softc *sc; 1639 struct g_provider *pp; 1640 char name[G_RAID_MAX_VOLUMENAME]; 1641 char announce_buf[80], buf1[32]; 1642 off_t off; 1643 int i; 1644 1645 sc = vol->v_softc; 1646 sx_assert(&sc->sc_lock, SX_LOCKED); 1647 1648 g_topology_lock(); 1649 /* Try to name provider with volume name. */ 1650 snprintf(name, sizeof(name), "raid/%s", vol->v_name); 1651 if (g_raid_name_format == 0 || vol->v_name[0] == 0 || 1652 g_provider_by_name(name) != NULL) { 1653 /* Otherwise use sequential volume number. */ 1654 snprintf(name, sizeof(name), "raid/r%d", vol->v_global_id); 1655 } 1656 1657 /* 1658 * Create a /dev/ar%d that the old ataraid(4) stack once 1659 * created as an alias for /dev/raid/r%d if requested. 1660 * This helps going from stable/7 ataraid devices to newer 1661 * FreeBSD releases. sbruno 07 MAY 2013 1662 */ 1663 1664 if (ar_legacy_aliases) { 1665 snprintf(announce_buf, sizeof(announce_buf), 1666 "kern.devalias.%s", name); 1667 snprintf(buf1, sizeof(buf1), 1668 "ar%d", vol->v_global_id); 1669 setenv(announce_buf, buf1); 1670 } 1671 1672 pp = g_new_providerf(sc->sc_geom, "%s", name); 1673 if (vol->v_tr->tro_class->trc_accept_unmapped) { 1674 pp->flags |= G_PF_ACCEPT_UNMAPPED; 1675 for (i = 0; i < vol->v_disks_count; i++) { 1676 sd = &vol->v_subdisks[i]; 1677 if (sd->sd_state == G_RAID_SUBDISK_S_NONE) 1678 continue; 1679 if ((sd->sd_disk->d_consumer->provider->flags & 1680 G_PF_ACCEPT_UNMAPPED) == 0) 1681 pp->flags &= ~G_PF_ACCEPT_UNMAPPED; 1682 } 1683 } 1684 pp->private = vol; 1685 pp->mediasize = vol->v_mediasize; 1686 pp->sectorsize = vol->v_sectorsize; 1687 pp->stripesize = 0; 1688 pp->stripeoffset = 0; 1689 if (vol->v_raid_level == G_RAID_VOLUME_RL_RAID1 || 1690 vol->v_raid_level == G_RAID_VOLUME_RL_RAID3 || 1691 vol->v_raid_level == G_RAID_VOLUME_RL_SINGLE || 1692 vol->v_raid_level == G_RAID_VOLUME_RL_CONCAT) { 1693 if ((disk = vol->v_subdisks[0].sd_disk) != NULL && 1694 disk->d_consumer != NULL && 1695 disk->d_consumer->provider != NULL) { 1696 pp->stripesize = disk->d_consumer->provider->stripesize; 1697 off = disk->d_consumer->provider->stripeoffset; 1698 pp->stripeoffset = off + vol->v_subdisks[0].sd_offset; 1699 if (off > 0) 1700 pp->stripeoffset %= off; 1701 } 1702 if (vol->v_raid_level == G_RAID_VOLUME_RL_RAID3) { 1703 pp->stripesize *= (vol->v_disks_count - 1); 1704 pp->stripeoffset *= (vol->v_disks_count - 1); 1705 } 1706 } else 1707 pp->stripesize = vol->v_strip_size; 1708 vol->v_provider = pp; 1709 g_error_provider(pp, 0); 1710 g_topology_unlock(); 1711 G_RAID_DEBUG1(0, sc, "Provider %s for volume %s created.", 1712 pp->name, vol->v_name); 1713 } 1714 1715 static void 1716 g_raid_destroy_provider(struct g_raid_volume *vol) 1717 { 1718 struct g_raid_softc *sc; 1719 struct g_provider *pp; 1720 struct bio *bp, *tmp; 1721 1722 g_topology_assert_not(); 1723 sc = vol->v_softc; 1724 pp = vol->v_provider; 1725 KASSERT(pp != NULL, ("NULL provider (volume=%s).", vol->v_name)); 1726 1727 g_topology_lock(); 1728 g_error_provider(pp, ENXIO); 1729 mtx_lock(&sc->sc_queue_mtx); 1730 TAILQ_FOREACH_SAFE(bp, &sc->sc_queue.queue, bio_queue, tmp) { 1731 if (bp->bio_to != pp) 1732 continue; 1733 bioq_remove(&sc->sc_queue, bp); 1734 g_io_deliver(bp, ENXIO); 1735 } 1736 mtx_unlock(&sc->sc_queue_mtx); 1737 G_RAID_DEBUG1(0, sc, "Provider %s for volume %s destroyed.", 1738 pp->name, vol->v_name); 1739 g_wither_provider(pp, ENXIO); 1740 g_topology_unlock(); 1741 vol->v_provider = NULL; 1742 } 1743 1744 /* 1745 * Update device state. 1746 */ 1747 static int 1748 g_raid_update_volume(struct g_raid_volume *vol, u_int event) 1749 { 1750 struct g_raid_softc *sc; 1751 1752 sc = vol->v_softc; 1753 sx_assert(&sc->sc_lock, SX_XLOCKED); 1754 1755 G_RAID_DEBUG1(2, sc, "Event %s for volume %s.", 1756 g_raid_volume_event2str(event), 1757 vol->v_name); 1758 switch (event) { 1759 case G_RAID_VOLUME_E_DOWN: 1760 if (vol->v_provider != NULL) 1761 g_raid_destroy_provider(vol); 1762 break; 1763 case G_RAID_VOLUME_E_UP: 1764 if (vol->v_provider == NULL) 1765 g_raid_launch_provider(vol); 1766 break; 1767 case G_RAID_VOLUME_E_START: 1768 if (vol->v_tr) 1769 G_RAID_TR_START(vol->v_tr); 1770 return (0); 1771 default: 1772 if (sc->sc_md) 1773 G_RAID_MD_VOLUME_EVENT(sc->sc_md, vol, event); 1774 return (0); 1775 } 1776 1777 /* Manage root mount release. */ 1778 if (vol->v_starting) { 1779 vol->v_starting = 0; 1780 G_RAID_DEBUG1(1, sc, "root_mount_rel %p", vol->v_rootmount); 1781 root_mount_rel(vol->v_rootmount); 1782 vol->v_rootmount = NULL; 1783 } 1784 if (vol->v_stopping && vol->v_provider_open == 0) 1785 g_raid_destroy_volume(vol); 1786 return (0); 1787 } 1788 1789 /* 1790 * Update subdisk state. 1791 */ 1792 static int 1793 g_raid_update_subdisk(struct g_raid_subdisk *sd, u_int event) 1794 { 1795 struct g_raid_softc *sc; 1796 struct g_raid_volume *vol; 1797 1798 sc = sd->sd_softc; 1799 vol = sd->sd_volume; 1800 sx_assert(&sc->sc_lock, SX_XLOCKED); 1801 1802 G_RAID_DEBUG1(2, sc, "Event %s for subdisk %s:%d-%s.", 1803 g_raid_subdisk_event2str(event), 1804 vol->v_name, sd->sd_pos, 1805 sd->sd_disk ? g_raid_get_diskname(sd->sd_disk) : "[none]"); 1806 if (vol->v_tr) 1807 G_RAID_TR_EVENT(vol->v_tr, sd, event); 1808 1809 return (0); 1810 } 1811 1812 /* 1813 * Update disk state. 1814 */ 1815 static int 1816 g_raid_update_disk(struct g_raid_disk *disk, u_int event) 1817 { 1818 struct g_raid_softc *sc; 1819 1820 sc = disk->d_softc; 1821 sx_assert(&sc->sc_lock, SX_XLOCKED); 1822 1823 G_RAID_DEBUG1(2, sc, "Event %s for disk %s.", 1824 g_raid_disk_event2str(event), 1825 g_raid_get_diskname(disk)); 1826 1827 if (sc->sc_md) 1828 G_RAID_MD_EVENT(sc->sc_md, disk, event); 1829 return (0); 1830 } 1831 1832 /* 1833 * Node event. 1834 */ 1835 static int 1836 g_raid_update_node(struct g_raid_softc *sc, u_int event) 1837 { 1838 sx_assert(&sc->sc_lock, SX_XLOCKED); 1839 1840 G_RAID_DEBUG1(2, sc, "Event %s for the array.", 1841 g_raid_node_event2str(event)); 1842 1843 if (event == G_RAID_NODE_E_WAKE) 1844 return (0); 1845 if (sc->sc_md) 1846 G_RAID_MD_EVENT(sc->sc_md, NULL, event); 1847 return (0); 1848 } 1849 1850 static int 1851 g_raid_access(struct g_provider *pp, int acr, int acw, int ace) 1852 { 1853 struct g_raid_volume *vol; 1854 struct g_raid_softc *sc; 1855 int dcw, opens, error = 0; 1856 1857 g_topology_assert(); 1858 sc = pp->geom->softc; 1859 vol = pp->private; 1860 KASSERT(sc != NULL, ("NULL softc (provider=%s).", pp->name)); 1861 KASSERT(vol != NULL, ("NULL volume (provider=%s).", pp->name)); 1862 1863 G_RAID_DEBUG1(2, sc, "Access request for %s: r%dw%de%d.", pp->name, 1864 acr, acw, ace); 1865 dcw = pp->acw + acw; 1866 1867 g_topology_unlock(); 1868 sx_xlock(&sc->sc_lock); 1869 /* Deny new opens while dying. */ 1870 if (sc->sc_stopping != 0 && (acr > 0 || acw > 0 || ace > 0)) { 1871 error = ENXIO; 1872 goto out; 1873 } 1874 /* Deny write opens for read-only volumes. */ 1875 if (vol->v_read_only && acw > 0) { 1876 error = EROFS; 1877 goto out; 1878 } 1879 if (dcw == 0) 1880 g_raid_clean(vol, dcw); 1881 vol->v_provider_open += acr + acw + ace; 1882 /* Handle delayed node destruction. */ 1883 if (sc->sc_stopping == G_RAID_DESTROY_DELAYED && 1884 vol->v_provider_open == 0) { 1885 /* Count open volumes. */ 1886 opens = g_raid_nopens(sc); 1887 if (opens == 0) { 1888 sc->sc_stopping = G_RAID_DESTROY_HARD; 1889 /* Wake up worker to make it selfdestruct. */ 1890 g_raid_event_send(sc, G_RAID_NODE_E_WAKE, 0); 1891 } 1892 } 1893 /* Handle open volume destruction. */ 1894 if (vol->v_stopping && vol->v_provider_open == 0) 1895 g_raid_destroy_volume(vol); 1896 out: 1897 sx_xunlock(&sc->sc_lock); 1898 g_topology_lock(); 1899 return (error); 1900 } 1901 1902 struct g_raid_softc * 1903 g_raid_create_node(struct g_class *mp, 1904 const char *name, struct g_raid_md_object *md) 1905 { 1906 struct g_raid_softc *sc; 1907 struct g_geom *gp; 1908 int error; 1909 1910 g_topology_assert(); 1911 G_RAID_DEBUG(1, "Creating array %s.", name); 1912 1913 gp = g_new_geomf(mp, "%s", name); 1914 sc = malloc(sizeof(*sc), M_RAID, M_WAITOK | M_ZERO); 1915 gp->start = g_raid_start; 1916 gp->orphan = g_raid_orphan; 1917 gp->access = g_raid_access; 1918 gp->dumpconf = g_raid_dumpconf; 1919 1920 sc->sc_md = md; 1921 sc->sc_geom = gp; 1922 sc->sc_flags = 0; 1923 TAILQ_INIT(&sc->sc_volumes); 1924 TAILQ_INIT(&sc->sc_disks); 1925 sx_init(&sc->sc_lock, "graid:lock"); 1926 mtx_init(&sc->sc_queue_mtx, "graid:queue", NULL, MTX_DEF); 1927 TAILQ_INIT(&sc->sc_events); 1928 bioq_init(&sc->sc_queue); 1929 gp->softc = sc; 1930 error = kproc_create(g_raid_worker, sc, &sc->sc_worker, 0, 0, 1931 "g_raid %s", name); 1932 if (error != 0) { 1933 G_RAID_DEBUG(0, "Cannot create kernel thread for %s.", name); 1934 mtx_destroy(&sc->sc_queue_mtx); 1935 sx_destroy(&sc->sc_lock); 1936 g_destroy_geom(sc->sc_geom); 1937 free(sc, M_RAID); 1938 return (NULL); 1939 } 1940 1941 G_RAID_DEBUG1(0, sc, "Array %s created.", name); 1942 return (sc); 1943 } 1944 1945 struct g_raid_volume * 1946 g_raid_create_volume(struct g_raid_softc *sc, const char *name, int id) 1947 { 1948 struct g_raid_volume *vol, *vol1; 1949 int i; 1950 1951 G_RAID_DEBUG1(1, sc, "Creating volume %s.", name); 1952 vol = malloc(sizeof(*vol), M_RAID, M_WAITOK | M_ZERO); 1953 vol->v_softc = sc; 1954 strlcpy(vol->v_name, name, G_RAID_MAX_VOLUMENAME); 1955 vol->v_state = G_RAID_VOLUME_S_STARTING; 1956 vol->v_raid_level = G_RAID_VOLUME_RL_UNKNOWN; 1957 vol->v_raid_level_qualifier = G_RAID_VOLUME_RLQ_UNKNOWN; 1958 vol->v_rotate_parity = 1; 1959 bioq_init(&vol->v_inflight); 1960 bioq_init(&vol->v_locked); 1961 LIST_INIT(&vol->v_locks); 1962 for (i = 0; i < G_RAID_MAX_SUBDISKS; i++) { 1963 vol->v_subdisks[i].sd_softc = sc; 1964 vol->v_subdisks[i].sd_volume = vol; 1965 vol->v_subdisks[i].sd_pos = i; 1966 vol->v_subdisks[i].sd_state = G_RAID_DISK_S_NONE; 1967 } 1968 1969 /* Find free ID for this volume. */ 1970 g_topology_lock(); 1971 vol1 = vol; 1972 if (id >= 0) { 1973 LIST_FOREACH(vol1, &g_raid_volumes, v_global_next) { 1974 if (vol1->v_global_id == id) 1975 break; 1976 } 1977 } 1978 if (vol1 != NULL) { 1979 for (id = 0; ; id++) { 1980 LIST_FOREACH(vol1, &g_raid_volumes, v_global_next) { 1981 if (vol1->v_global_id == id) 1982 break; 1983 } 1984 if (vol1 == NULL) 1985 break; 1986 } 1987 } 1988 vol->v_global_id = id; 1989 LIST_INSERT_HEAD(&g_raid_volumes, vol, v_global_next); 1990 g_topology_unlock(); 1991 1992 /* Delay root mounting. */ 1993 vol->v_rootmount = root_mount_hold("GRAID"); 1994 G_RAID_DEBUG1(1, sc, "root_mount_hold %p", vol->v_rootmount); 1995 vol->v_starting = 1; 1996 TAILQ_INSERT_TAIL(&sc->sc_volumes, vol, v_next); 1997 return (vol); 1998 } 1999 2000 struct g_raid_disk * 2001 g_raid_create_disk(struct g_raid_softc *sc) 2002 { 2003 struct g_raid_disk *disk; 2004 2005 G_RAID_DEBUG1(1, sc, "Creating disk."); 2006 disk = malloc(sizeof(*disk), M_RAID, M_WAITOK | M_ZERO); 2007 disk->d_softc = sc; 2008 disk->d_state = G_RAID_DISK_S_NONE; 2009 TAILQ_INIT(&disk->d_subdisks); 2010 TAILQ_INSERT_TAIL(&sc->sc_disks, disk, d_next); 2011 return (disk); 2012 } 2013 2014 int g_raid_start_volume(struct g_raid_volume *vol) 2015 { 2016 struct g_raid_tr_class *class; 2017 struct g_raid_tr_object *obj; 2018 int status; 2019 2020 G_RAID_DEBUG1(2, vol->v_softc, "Starting volume %s.", vol->v_name); 2021 LIST_FOREACH(class, &g_raid_tr_classes, trc_list) { 2022 if (!class->trc_enable) 2023 continue; 2024 G_RAID_DEBUG1(2, vol->v_softc, 2025 "Tasting volume %s for %s transformation.", 2026 vol->v_name, class->name); 2027 obj = (void *)kobj_create((kobj_class_t)class, M_RAID, 2028 M_WAITOK); 2029 obj->tro_class = class; 2030 obj->tro_volume = vol; 2031 status = G_RAID_TR_TASTE(obj, vol); 2032 if (status != G_RAID_TR_TASTE_FAIL) 2033 break; 2034 kobj_delete((kobj_t)obj, M_RAID); 2035 } 2036 if (class == NULL) { 2037 G_RAID_DEBUG1(0, vol->v_softc, 2038 "No transformation module found for %s.", 2039 vol->v_name); 2040 vol->v_tr = NULL; 2041 g_raid_change_volume_state(vol, G_RAID_VOLUME_S_UNSUPPORTED); 2042 g_raid_event_send(vol, G_RAID_VOLUME_E_DOWN, 2043 G_RAID_EVENT_VOLUME); 2044 return (-1); 2045 } 2046 G_RAID_DEBUG1(2, vol->v_softc, 2047 "Transformation module %s chosen for %s.", 2048 class->name, vol->v_name); 2049 vol->v_tr = obj; 2050 return (0); 2051 } 2052 2053 int 2054 g_raid_destroy_node(struct g_raid_softc *sc, int worker) 2055 { 2056 struct g_raid_volume *vol, *tmpv; 2057 struct g_raid_disk *disk, *tmpd; 2058 int error = 0; 2059 2060 sc->sc_stopping = G_RAID_DESTROY_HARD; 2061 TAILQ_FOREACH_SAFE(vol, &sc->sc_volumes, v_next, tmpv) { 2062 if (g_raid_destroy_volume(vol)) 2063 error = EBUSY; 2064 } 2065 if (error) 2066 return (error); 2067 TAILQ_FOREACH_SAFE(disk, &sc->sc_disks, d_next, tmpd) { 2068 if (g_raid_destroy_disk(disk)) 2069 error = EBUSY; 2070 } 2071 if (error) 2072 return (error); 2073 if (sc->sc_md) { 2074 G_RAID_MD_FREE(sc->sc_md); 2075 kobj_delete((kobj_t)sc->sc_md, M_RAID); 2076 sc->sc_md = NULL; 2077 } 2078 if (sc->sc_geom != NULL) { 2079 G_RAID_DEBUG1(0, sc, "Array %s destroyed.", sc->sc_name); 2080 g_topology_lock(); 2081 sc->sc_geom->softc = NULL; 2082 g_wither_geom(sc->sc_geom, ENXIO); 2083 g_topology_unlock(); 2084 sc->sc_geom = NULL; 2085 } else 2086 G_RAID_DEBUG(1, "Array destroyed."); 2087 if (worker) { 2088 g_raid_event_cancel(sc, sc); 2089 mtx_destroy(&sc->sc_queue_mtx); 2090 sx_xunlock(&sc->sc_lock); 2091 sx_destroy(&sc->sc_lock); 2092 wakeup(&sc->sc_stopping); 2093 free(sc, M_RAID); 2094 curthread->td_pflags &= ~TDP_GEOM; 2095 G_RAID_DEBUG(1, "Thread exiting."); 2096 kproc_exit(0); 2097 } else { 2098 /* Wake up worker to make it selfdestruct. */ 2099 g_raid_event_send(sc, G_RAID_NODE_E_WAKE, 0); 2100 } 2101 return (0); 2102 } 2103 2104 int 2105 g_raid_destroy_volume(struct g_raid_volume *vol) 2106 { 2107 struct g_raid_softc *sc; 2108 struct g_raid_disk *disk; 2109 int i; 2110 2111 sc = vol->v_softc; 2112 G_RAID_DEBUG1(2, sc, "Destroying volume %s.", vol->v_name); 2113 vol->v_stopping = 1; 2114 if (vol->v_state != G_RAID_VOLUME_S_STOPPED) { 2115 if (vol->v_tr) { 2116 G_RAID_TR_STOP(vol->v_tr); 2117 return (EBUSY); 2118 } else 2119 vol->v_state = G_RAID_VOLUME_S_STOPPED; 2120 } 2121 if (g_raid_event_check(sc, vol) != 0) 2122 return (EBUSY); 2123 if (vol->v_provider != NULL) 2124 return (EBUSY); 2125 if (vol->v_provider_open != 0) 2126 return (EBUSY); 2127 if (vol->v_tr) { 2128 G_RAID_TR_FREE(vol->v_tr); 2129 kobj_delete((kobj_t)vol->v_tr, M_RAID); 2130 vol->v_tr = NULL; 2131 } 2132 if (vol->v_rootmount) 2133 root_mount_rel(vol->v_rootmount); 2134 g_topology_lock(); 2135 LIST_REMOVE(vol, v_global_next); 2136 g_topology_unlock(); 2137 TAILQ_REMOVE(&sc->sc_volumes, vol, v_next); 2138 for (i = 0; i < G_RAID_MAX_SUBDISKS; i++) { 2139 g_raid_event_cancel(sc, &vol->v_subdisks[i]); 2140 disk = vol->v_subdisks[i].sd_disk; 2141 if (disk == NULL) 2142 continue; 2143 TAILQ_REMOVE(&disk->d_subdisks, &vol->v_subdisks[i], sd_next); 2144 } 2145 G_RAID_DEBUG1(2, sc, "Volume %s destroyed.", vol->v_name); 2146 if (sc->sc_md) 2147 G_RAID_MD_FREE_VOLUME(sc->sc_md, vol); 2148 g_raid_event_cancel(sc, vol); 2149 free(vol, M_RAID); 2150 if (sc->sc_stopping == G_RAID_DESTROY_HARD) { 2151 /* Wake up worker to let it selfdestruct. */ 2152 g_raid_event_send(sc, G_RAID_NODE_E_WAKE, 0); 2153 } 2154 return (0); 2155 } 2156 2157 int 2158 g_raid_destroy_disk(struct g_raid_disk *disk) 2159 { 2160 struct g_raid_softc *sc; 2161 struct g_raid_subdisk *sd, *tmp; 2162 2163 sc = disk->d_softc; 2164 G_RAID_DEBUG1(2, sc, "Destroying disk."); 2165 if (disk->d_consumer) { 2166 g_raid_kill_consumer(sc, disk->d_consumer); 2167 disk->d_consumer = NULL; 2168 } 2169 TAILQ_FOREACH_SAFE(sd, &disk->d_subdisks, sd_next, tmp) { 2170 g_raid_change_subdisk_state(sd, G_RAID_SUBDISK_S_NONE); 2171 g_raid_event_send(sd, G_RAID_SUBDISK_E_DISCONNECTED, 2172 G_RAID_EVENT_SUBDISK); 2173 TAILQ_REMOVE(&disk->d_subdisks, sd, sd_next); 2174 sd->sd_disk = NULL; 2175 } 2176 TAILQ_REMOVE(&sc->sc_disks, disk, d_next); 2177 if (sc->sc_md) 2178 G_RAID_MD_FREE_DISK(sc->sc_md, disk); 2179 g_raid_event_cancel(sc, disk); 2180 free(disk, M_RAID); 2181 return (0); 2182 } 2183 2184 int 2185 g_raid_destroy(struct g_raid_softc *sc, int how) 2186 { 2187 int error, opens; 2188 2189 g_topology_assert_not(); 2190 if (sc == NULL) 2191 return (ENXIO); 2192 sx_assert(&sc->sc_lock, SX_XLOCKED); 2193 2194 /* Count open volumes. */ 2195 opens = g_raid_nopens(sc); 2196 2197 /* React on some opened volumes. */ 2198 if (opens > 0) { 2199 switch (how) { 2200 case G_RAID_DESTROY_SOFT: 2201 G_RAID_DEBUG1(1, sc, 2202 "%d volumes are still open.", 2203 opens); 2204 sx_xunlock(&sc->sc_lock); 2205 return (EBUSY); 2206 case G_RAID_DESTROY_DELAYED: 2207 G_RAID_DEBUG1(1, sc, 2208 "Array will be destroyed on last close."); 2209 sc->sc_stopping = G_RAID_DESTROY_DELAYED; 2210 sx_xunlock(&sc->sc_lock); 2211 return (EBUSY); 2212 case G_RAID_DESTROY_HARD: 2213 G_RAID_DEBUG1(1, sc, 2214 "%d volumes are still open.", 2215 opens); 2216 } 2217 } 2218 2219 /* Mark node for destruction. */ 2220 sc->sc_stopping = G_RAID_DESTROY_HARD; 2221 /* Wake up worker to let it selfdestruct. */ 2222 g_raid_event_send(sc, G_RAID_NODE_E_WAKE, 0); 2223 /* Sleep until node destroyed. */ 2224 error = sx_sleep(&sc->sc_stopping, &sc->sc_lock, 2225 PRIBIO | PDROP, "r:destroy", hz * 3); 2226 return (error == EWOULDBLOCK ? EBUSY : 0); 2227 } 2228 2229 static void 2230 g_raid_taste_orphan(struct g_consumer *cp) 2231 { 2232 2233 KASSERT(1 == 0, ("%s called while tasting %s.", __func__, 2234 cp->provider->name)); 2235 } 2236 2237 static struct g_geom * 2238 g_raid_taste(struct g_class *mp, struct g_provider *pp, int flags __unused) 2239 { 2240 struct g_consumer *cp; 2241 struct g_geom *gp, *geom; 2242 struct g_raid_md_class *class; 2243 struct g_raid_md_object *obj; 2244 int status; 2245 2246 g_topology_assert(); 2247 g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name); 2248 if (!g_raid_enable) 2249 return (NULL); 2250 G_RAID_DEBUG(2, "Tasting provider %s.", pp->name); 2251 2252 geom = NULL; 2253 status = G_RAID_MD_TASTE_FAIL; 2254 gp = g_new_geomf(mp, "raid:taste"); 2255 /* 2256 * This orphan function should be never called. 2257 */ 2258 gp->orphan = g_raid_taste_orphan; 2259 cp = g_new_consumer(gp); 2260 g_attach(cp, pp); 2261 if (g_access(cp, 1, 0, 0) != 0) 2262 goto ofail; 2263 2264 LIST_FOREACH(class, &g_raid_md_classes, mdc_list) { 2265 if (!class->mdc_enable) 2266 continue; 2267 G_RAID_DEBUG(2, "Tasting provider %s for %s metadata.", 2268 pp->name, class->name); 2269 obj = (void *)kobj_create((kobj_class_t)class, M_RAID, 2270 M_WAITOK); 2271 obj->mdo_class = class; 2272 status = G_RAID_MD_TASTE(obj, mp, cp, &geom); 2273 if (status != G_RAID_MD_TASTE_NEW) 2274 kobj_delete((kobj_t)obj, M_RAID); 2275 if (status != G_RAID_MD_TASTE_FAIL) 2276 break; 2277 } 2278 2279 if (status == G_RAID_MD_TASTE_FAIL) 2280 (void)g_access(cp, -1, 0, 0); 2281 ofail: 2282 g_detach(cp); 2283 g_destroy_consumer(cp); 2284 g_destroy_geom(gp); 2285 G_RAID_DEBUG(2, "Tasting provider %s done.", pp->name); 2286 return (geom); 2287 } 2288 2289 int 2290 g_raid_create_node_format(const char *format, struct gctl_req *req, 2291 struct g_geom **gp) 2292 { 2293 struct g_raid_md_class *class; 2294 struct g_raid_md_object *obj; 2295 int status; 2296 2297 G_RAID_DEBUG(2, "Creating array for %s metadata.", format); 2298 LIST_FOREACH(class, &g_raid_md_classes, mdc_list) { 2299 if (strcasecmp(class->name, format) == 0) 2300 break; 2301 } 2302 if (class == NULL) { 2303 G_RAID_DEBUG(1, "No support for %s metadata.", format); 2304 return (G_RAID_MD_TASTE_FAIL); 2305 } 2306 obj = (void *)kobj_create((kobj_class_t)class, M_RAID, 2307 M_WAITOK); 2308 obj->mdo_class = class; 2309 status = G_RAID_MD_CREATE_REQ(obj, &g_raid_class, req, gp); 2310 if (status != G_RAID_MD_TASTE_NEW) 2311 kobj_delete((kobj_t)obj, M_RAID); 2312 return (status); 2313 } 2314 2315 static int 2316 g_raid_destroy_geom(struct gctl_req *req __unused, 2317 struct g_class *mp __unused, struct g_geom *gp) 2318 { 2319 struct g_raid_softc *sc; 2320 int error; 2321 2322 g_topology_unlock(); 2323 sc = gp->softc; 2324 sx_xlock(&sc->sc_lock); 2325 g_cancel_event(sc); 2326 error = g_raid_destroy(gp->softc, G_RAID_DESTROY_SOFT); 2327 g_topology_lock(); 2328 return (error); 2329 } 2330 2331 void g_raid_write_metadata(struct g_raid_softc *sc, struct g_raid_volume *vol, 2332 struct g_raid_subdisk *sd, struct g_raid_disk *disk) 2333 { 2334 2335 if (sc->sc_stopping == G_RAID_DESTROY_HARD) 2336 return; 2337 if (sc->sc_md) 2338 G_RAID_MD_WRITE(sc->sc_md, vol, sd, disk); 2339 } 2340 2341 void g_raid_fail_disk(struct g_raid_softc *sc, 2342 struct g_raid_subdisk *sd, struct g_raid_disk *disk) 2343 { 2344 2345 if (disk == NULL) 2346 disk = sd->sd_disk; 2347 if (disk == NULL) { 2348 G_RAID_DEBUG1(0, sc, "Warning! Fail request to an absent disk!"); 2349 return; 2350 } 2351 if (disk->d_state != G_RAID_DISK_S_ACTIVE) { 2352 G_RAID_DEBUG1(0, sc, "Warning! Fail request to a disk in a " 2353 "wrong state (%s)!", g_raid_disk_state2str(disk->d_state)); 2354 return; 2355 } 2356 if (sc->sc_md) 2357 G_RAID_MD_FAIL_DISK(sc->sc_md, sd, disk); 2358 } 2359 2360 static void 2361 g_raid_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 2362 struct g_consumer *cp, struct g_provider *pp) 2363 { 2364 struct g_raid_softc *sc; 2365 struct g_raid_volume *vol; 2366 struct g_raid_subdisk *sd; 2367 struct g_raid_disk *disk; 2368 int i, s; 2369 2370 g_topology_assert(); 2371 2372 sc = gp->softc; 2373 if (sc == NULL) 2374 return; 2375 if (pp != NULL) { 2376 vol = pp->private; 2377 g_topology_unlock(); 2378 sx_xlock(&sc->sc_lock); 2379 sbuf_printf(sb, "%s<descr>%s %s volume</descr>\n", indent, 2380 sc->sc_md->mdo_class->name, 2381 g_raid_volume_level2str(vol->v_raid_level, 2382 vol->v_raid_level_qualifier)); 2383 sbuf_printf(sb, "%s<Label>%s</Label>\n", indent, 2384 vol->v_name); 2385 sbuf_printf(sb, "%s<RAIDLevel>%s</RAIDLevel>\n", indent, 2386 g_raid_volume_level2str(vol->v_raid_level, 2387 vol->v_raid_level_qualifier)); 2388 sbuf_printf(sb, 2389 "%s<Transformation>%s</Transformation>\n", indent, 2390 vol->v_tr ? vol->v_tr->tro_class->name : "NONE"); 2391 sbuf_printf(sb, "%s<Components>%u</Components>\n", indent, 2392 vol->v_disks_count); 2393 sbuf_printf(sb, "%s<Strip>%u</Strip>\n", indent, 2394 vol->v_strip_size); 2395 sbuf_printf(sb, "%s<State>%s</State>\n", indent, 2396 g_raid_volume_state2str(vol->v_state)); 2397 sbuf_printf(sb, "%s<Dirty>%s</Dirty>\n", indent, 2398 vol->v_dirty ? "Yes" : "No"); 2399 sbuf_printf(sb, "%s<Subdisks>", indent); 2400 for (i = 0; i < vol->v_disks_count; i++) { 2401 sd = &vol->v_subdisks[i]; 2402 if (sd->sd_disk != NULL && 2403 sd->sd_disk->d_consumer != NULL) { 2404 sbuf_printf(sb, "%s ", 2405 g_raid_get_diskname(sd->sd_disk)); 2406 } else { 2407 sbuf_printf(sb, "NONE "); 2408 } 2409 sbuf_printf(sb, "(%s", 2410 g_raid_subdisk_state2str(sd->sd_state)); 2411 if (sd->sd_state == G_RAID_SUBDISK_S_REBUILD || 2412 sd->sd_state == G_RAID_SUBDISK_S_RESYNC) { 2413 sbuf_printf(sb, " %d%%", 2414 (int)(sd->sd_rebuild_pos * 100 / 2415 sd->sd_size)); 2416 } 2417 sbuf_printf(sb, ")"); 2418 if (i + 1 < vol->v_disks_count) 2419 sbuf_printf(sb, ", "); 2420 } 2421 sbuf_printf(sb, "</Subdisks>\n"); 2422 sx_xunlock(&sc->sc_lock); 2423 g_topology_lock(); 2424 } else if (cp != NULL) { 2425 disk = cp->private; 2426 if (disk == NULL) 2427 return; 2428 g_topology_unlock(); 2429 sx_xlock(&sc->sc_lock); 2430 sbuf_printf(sb, "%s<State>%s", indent, 2431 g_raid_disk_state2str(disk->d_state)); 2432 if (!TAILQ_EMPTY(&disk->d_subdisks)) { 2433 sbuf_printf(sb, " ("); 2434 TAILQ_FOREACH(sd, &disk->d_subdisks, sd_next) { 2435 sbuf_printf(sb, "%s", 2436 g_raid_subdisk_state2str(sd->sd_state)); 2437 if (sd->sd_state == G_RAID_SUBDISK_S_REBUILD || 2438 sd->sd_state == G_RAID_SUBDISK_S_RESYNC) { 2439 sbuf_printf(sb, " %d%%", 2440 (int)(sd->sd_rebuild_pos * 100 / 2441 sd->sd_size)); 2442 } 2443 if (TAILQ_NEXT(sd, sd_next)) 2444 sbuf_printf(sb, ", "); 2445 } 2446 sbuf_printf(sb, ")"); 2447 } 2448 sbuf_printf(sb, "</State>\n"); 2449 sbuf_printf(sb, "%s<Subdisks>", indent); 2450 TAILQ_FOREACH(sd, &disk->d_subdisks, sd_next) { 2451 sbuf_printf(sb, "r%d(%s):%d@%ju", 2452 sd->sd_volume->v_global_id, 2453 sd->sd_volume->v_name, 2454 sd->sd_pos, sd->sd_offset); 2455 if (TAILQ_NEXT(sd, sd_next)) 2456 sbuf_printf(sb, ", "); 2457 } 2458 sbuf_printf(sb, "</Subdisks>\n"); 2459 sbuf_printf(sb, "%s<ReadErrors>%d</ReadErrors>\n", indent, 2460 disk->d_read_errs); 2461 sx_xunlock(&sc->sc_lock); 2462 g_topology_lock(); 2463 } else { 2464 g_topology_unlock(); 2465 sx_xlock(&sc->sc_lock); 2466 if (sc->sc_md) { 2467 sbuf_printf(sb, "%s<Metadata>%s</Metadata>\n", indent, 2468 sc->sc_md->mdo_class->name); 2469 } 2470 if (!TAILQ_EMPTY(&sc->sc_volumes)) { 2471 s = 0xff; 2472 TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) { 2473 if (vol->v_state < s) 2474 s = vol->v_state; 2475 } 2476 sbuf_printf(sb, "%s<State>%s</State>\n", indent, 2477 g_raid_volume_state2str(s)); 2478 } 2479 sx_xunlock(&sc->sc_lock); 2480 g_topology_lock(); 2481 } 2482 } 2483 2484 static void 2485 g_raid_shutdown_post_sync(void *arg, int howto) 2486 { 2487 struct g_class *mp; 2488 struct g_geom *gp, *gp2; 2489 struct g_raid_softc *sc; 2490 struct g_raid_volume *vol; 2491 2492 mp = arg; 2493 DROP_GIANT(); 2494 g_topology_lock(); 2495 g_raid_shutdown = 1; 2496 LIST_FOREACH_SAFE(gp, &mp->geom, geom, gp2) { 2497 if ((sc = gp->softc) == NULL) 2498 continue; 2499 g_topology_unlock(); 2500 sx_xlock(&sc->sc_lock); 2501 TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) 2502 g_raid_clean(vol, -1); 2503 g_cancel_event(sc); 2504 g_raid_destroy(sc, G_RAID_DESTROY_DELAYED); 2505 g_topology_lock(); 2506 } 2507 g_topology_unlock(); 2508 PICKUP_GIANT(); 2509 } 2510 2511 static void 2512 g_raid_init(struct g_class *mp) 2513 { 2514 2515 g_raid_post_sync = EVENTHANDLER_REGISTER(shutdown_post_sync, 2516 g_raid_shutdown_post_sync, mp, SHUTDOWN_PRI_FIRST); 2517 if (g_raid_post_sync == NULL) 2518 G_RAID_DEBUG(0, "Warning! Cannot register shutdown event."); 2519 g_raid_started = 1; 2520 } 2521 2522 static void 2523 g_raid_fini(struct g_class *mp) 2524 { 2525 2526 if (g_raid_post_sync != NULL) 2527 EVENTHANDLER_DEREGISTER(shutdown_post_sync, g_raid_post_sync); 2528 g_raid_started = 0; 2529 } 2530 2531 int 2532 g_raid_md_modevent(module_t mod, int type, void *arg) 2533 { 2534 struct g_raid_md_class *class, *c, *nc; 2535 int error; 2536 2537 error = 0; 2538 class = arg; 2539 switch (type) { 2540 case MOD_LOAD: 2541 c = LIST_FIRST(&g_raid_md_classes); 2542 if (c == NULL || c->mdc_priority > class->mdc_priority) 2543 LIST_INSERT_HEAD(&g_raid_md_classes, class, mdc_list); 2544 else { 2545 while ((nc = LIST_NEXT(c, mdc_list)) != NULL && 2546 nc->mdc_priority < class->mdc_priority) 2547 c = nc; 2548 LIST_INSERT_AFTER(c, class, mdc_list); 2549 } 2550 if (g_raid_started) 2551 g_retaste(&g_raid_class); 2552 break; 2553 case MOD_UNLOAD: 2554 LIST_REMOVE(class, mdc_list); 2555 break; 2556 default: 2557 error = EOPNOTSUPP; 2558 break; 2559 } 2560 2561 return (error); 2562 } 2563 2564 int 2565 g_raid_tr_modevent(module_t mod, int type, void *arg) 2566 { 2567 struct g_raid_tr_class *class, *c, *nc; 2568 int error; 2569 2570 error = 0; 2571 class = arg; 2572 switch (type) { 2573 case MOD_LOAD: 2574 c = LIST_FIRST(&g_raid_tr_classes); 2575 if (c == NULL || c->trc_priority > class->trc_priority) 2576 LIST_INSERT_HEAD(&g_raid_tr_classes, class, trc_list); 2577 else { 2578 while ((nc = LIST_NEXT(c, trc_list)) != NULL && 2579 nc->trc_priority < class->trc_priority) 2580 c = nc; 2581 LIST_INSERT_AFTER(c, class, trc_list); 2582 } 2583 break; 2584 case MOD_UNLOAD: 2585 LIST_REMOVE(class, trc_list); 2586 break; 2587 default: 2588 error = EOPNOTSUPP; 2589 break; 2590 } 2591 2592 return (error); 2593 } 2594 2595 /* 2596 * Use local implementation of DECLARE_GEOM_CLASS(g_raid_class, g_raid) 2597 * to reduce module priority, allowing submodules to register them first. 2598 */ 2599 static moduledata_t g_raid_mod = { 2600 "g_raid", 2601 g_modevent, 2602 &g_raid_class 2603 }; 2604 DECLARE_MODULE(g_raid, g_raid_mod, SI_SUB_DRIVERS, SI_ORDER_THIRD); 2605 MODULE_VERSION(geom_raid, 0);
Cache object: ecb862ede2095489e8761f9edaac3d14
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