sys/geom/raid/g_raid.c

   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         cp->flags |= G_CF_DIRECT_RECEIVE;
 796         if (g_attach(cp, pp) != 0) {
 797                 g_destroy_consumer(cp);
 798                 return (NULL);
 799         }
 800         if (g_access(cp, 1, 1, 1) != 0) {
 801                 g_detach(cp);
 802                 g_destroy_consumer(cp);
 803                 return (NULL);
 804         }
 805         return (cp);
 806 }
 807
 808 static u_int
 809 g_raid_nrequests(struct g_raid_softc *sc, struct g_consumer *cp)
 810 {
 811         struct bio *bp;
 812         u_int nreqs = 0;
 813
 814         mtx_lock(&sc->sc_queue_mtx);
 815         TAILQ_FOREACH(bp, &sc->sc_queue.queue, bio_queue) {
 816                 if (bp->bio_from == cp)
 817                         nreqs++;
 818         }
 819         mtx_unlock(&sc->sc_queue_mtx);
 820         return (nreqs);
 821 }
 822
 823 u_int
 824 g_raid_nopens(struct g_raid_softc *sc)
 825 {
 826         struct g_raid_volume *vol;
 827         u_int opens;
 828
 829         opens = 0;
 830         TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) {
 831                 if (vol->v_provider_open != 0)
 832                         opens++;
 833         }
 834         return (opens);
 835 }
 836
 837 static int
 838 g_raid_consumer_is_busy(struct g_raid_softc *sc, struct g_consumer *cp)
 839 {
 840
 841         if (cp->index > 0) {
 842                 G_RAID_DEBUG1(2, sc,
 843                     "I/O requests for %s exist, can't destroy it now.",
 844                     cp->provider->name);
 845                 return (1);
 846         }
 847         if (g_raid_nrequests(sc, cp) > 0) {
 848                 G_RAID_DEBUG1(2, sc,
 849                     "I/O requests for %s in queue, can't destroy it now.",
 850                     cp->provider->name);
 851                 return (1);
 852         }
 853         return (0);
 854 }
 855
 856 static void
 857 g_raid_destroy_consumer(void *arg, int flags __unused)
 858 {
 859         struct g_consumer *cp;
 860
 861         g_topology_assert();
 862
 863         cp = arg;
 864         G_RAID_DEBUG(1, "Consumer %s destroyed.", cp->provider->name);
 865         g_detach(cp);
 866         g_destroy_consumer(cp);
 867 }
 868
 869 void
 870 g_raid_kill_consumer(struct g_raid_softc *sc, struct g_consumer *cp)
 871 {
 872         struct g_provider *pp;
 873         int retaste_wait;
 874
 875         g_topology_assert_not();
 876
 877         g_topology_lock();
 878         cp->private = NULL;
 879         if (g_raid_consumer_is_busy(sc, cp))
 880                 goto out;
 881         pp = cp->provider;
 882         retaste_wait = 0;
 883         if (cp->acw == 1) {
 884                 if ((pp->geom->flags & G_GEOM_WITHER) == 0)
 885                         retaste_wait = 1;
 886         }
 887         if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0)
 888                 g_access(cp, -cp->acr, -cp->acw, -cp->ace);
 889         if (retaste_wait) {
 890                 /*
 891                  * After retaste event was send (inside g_access()), we can send
 892                  * event to detach and destroy consumer.
 893                  * A class, which has consumer to the given provider connected
 894                  * will not receive retaste event for the provider.
 895                  * This is the way how I ignore retaste events when I close
 896                  * consumers opened for write: I detach and destroy consumer
 897                  * after retaste event is sent.
 898                  */
 899                 g_post_event(g_raid_destroy_consumer, cp, M_WAITOK, NULL);
 900                 goto out;
 901         }
 902         G_RAID_DEBUG(1, "Consumer %s destroyed.", pp->name);
 903         g_detach(cp);
 904         g_destroy_consumer(cp);
 905 out:
 906         g_topology_unlock();
 907 }
 908
 909 static void
 910 g_raid_orphan(struct g_consumer *cp)
 911 {
 912         struct g_raid_disk *disk;
 913
 914         g_topology_assert();
 915
 916         disk = cp->private;
 917         if (disk == NULL)
 918                 return;
 919         g_raid_event_send(disk, G_RAID_DISK_E_DISCONNECTED,
 920             G_RAID_EVENT_DISK);
 921 }
 922
 923 static void
 924 g_raid_clean(struct g_raid_volume *vol, int acw)
 925 {
 926         struct g_raid_softc *sc;
 927         int timeout;
 928
 929         sc = vol->v_softc;
 930         g_topology_assert_not();
 931         sx_assert(&sc->sc_lock, SX_XLOCKED);
 932
 933 //      if ((sc->sc_flags & G_RAID_DEVICE_FLAG_NOFAILSYNC) != 0)
 934 //              return;
 935         if (!vol->v_dirty)
 936                 return;
 937         if (vol->v_writes > 0)
 938                 return;
 939         if (acw > 0 || (acw == -1 &&
 940             vol->v_provider != NULL && vol->v_provider->acw > 0)) {
 941                 timeout = g_raid_clean_time - (time_uptime - vol->v_last_write);
 942                 if (!g_raid_shutdown && timeout > 0)
 943                         return;
 944         }
 945         vol->v_dirty = 0;
 946         G_RAID_DEBUG1(1, sc, "Volume %s marked as clean.",
 947             vol->v_name);
 948         g_raid_write_metadata(sc, vol, NULL, NULL);
 949 }
 950
 951 static void
 952 g_raid_dirty(struct g_raid_volume *vol)
 953 {
 954         struct g_raid_softc *sc;
 955
 956         sc = vol->v_softc;
 957         g_topology_assert_not();
 958         sx_assert(&sc->sc_lock, SX_XLOCKED);
 959
 960 //      if ((sc->sc_flags & G_RAID_DEVICE_FLAG_NOFAILSYNC) != 0)
 961 //              return;
 962         vol->v_dirty = 1;
 963         G_RAID_DEBUG1(1, sc, "Volume %s marked as dirty.",
 964             vol->v_name);
 965         g_raid_write_metadata(sc, vol, NULL, NULL);
 966 }
 967
 968 void
 969 g_raid_tr_flush_common(struct g_raid_tr_object *tr, struct bio *bp)
 970 {
 971         struct g_raid_softc *sc;
 972         struct g_raid_volume *vol;
 973         struct g_raid_subdisk *sd;
 974         struct bio_queue_head queue;
 975         struct bio *cbp;
 976         int i;
 977
 978         vol = tr->tro_volume;
 979         sc = vol->v_softc;
 980
 981         /*
 982          * Allocate all bios before sending any request, so we can return
 983          * ENOMEM in nice and clean way.
 984          */
 985         bioq_init(&queue);
 986         for (i = 0; i < vol->v_disks_count; i++) {
 987                 sd = &vol->v_subdisks[i];
 988                 if (sd->sd_state == G_RAID_SUBDISK_S_NONE ||
 989                     sd->sd_state == G_RAID_SUBDISK_S_FAILED)
 990                         continue;
 991                 cbp = g_clone_bio(bp);
 992                 if (cbp == NULL)
 993                         goto failure;
 994                 cbp->bio_caller1 = sd;
 995                 bioq_insert_tail(&queue, cbp);
 996         }
 997         while ((cbp = bioq_takefirst(&queue)) != NULL) {
 998                 sd = cbp->bio_caller1;
 999                 cbp->bio_caller1 = NULL;
1000                 g_raid_subdisk_iostart(sd, cbp);
1001         }
1002         return;
1003 failure:
1004         while ((cbp = bioq_takefirst(&queue)) != NULL)
1005                 g_destroy_bio(cbp);
1006         if (bp->bio_error == 0)
1007                 bp->bio_error = ENOMEM;
1008         g_raid_iodone(bp, bp->bio_error);
1009 }
1010
1011 static void
1012 g_raid_tr_kerneldump_common_done(struct bio *bp)
1013 {
1014
1015         bp->bio_flags |= BIO_DONE;
1016 }
1017
1018 int
1019 g_raid_tr_kerneldump_common(struct g_raid_tr_object *tr,
1020     void *virtual, vm_offset_t physical, off_t offset, size_t length)
1021 {
1022         struct g_raid_softc *sc;
1023         struct g_raid_volume *vol;
1024         struct bio bp;
1025
1026         vol = tr->tro_volume;
1027         sc = vol->v_softc;
1028
1029         bzero(&bp, sizeof(bp));
1030         bp.bio_cmd = BIO_WRITE;
1031         bp.bio_done = g_raid_tr_kerneldump_common_done;
1032         bp.bio_attribute = NULL;
1033         bp.bio_offset = offset;
1034         bp.bio_length = length;
1035         bp.bio_data = virtual;
1036         bp.bio_to = vol->v_provider;
1037
1038         g_raid_start(&bp);
1039         while (!(bp.bio_flags & BIO_DONE)) {
1040                 G_RAID_DEBUG1(4, sc, "Poll...");
1041                 g_raid_poll(sc);
1042                 DELAY(10);
1043         }
1044
1045         return (bp.bio_error != 0 ? EIO : 0);
1046 }
1047
1048 static int
1049 g_raid_dump(void *arg,
1050     void *virtual, vm_offset_t physical, off_t offset, size_t length)
1051 {
1052         struct g_raid_volume *vol;
1053         int error;
1054
1055         vol = (struct g_raid_volume *)arg;
1056         G_RAID_DEBUG1(3, vol->v_softc, "Dumping at off %llu len %llu.",
1057             (long long unsigned)offset, (long long unsigned)length);
1058
1059         error = G_RAID_TR_KERNELDUMP(vol->v_tr,
1060             virtual, physical, offset, length);
1061         return (error);
1062 }
1063
1064 static void
1065 g_raid_kerneldump(struct g_raid_softc *sc, struct bio *bp)
1066 {
1067         struct g_kerneldump *gkd;
1068         struct g_provider *pp;
1069         struct g_raid_volume *vol;
1070
1071         gkd = (struct g_kerneldump*)bp->bio_data;
1072         pp = bp->bio_to;
1073         vol = pp->private;
1074         g_trace(G_T_TOPOLOGY, "g_raid_kerneldump(%s, %jd, %jd)",
1075                 pp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length);
1076         gkd->di.dumper = g_raid_dump;
1077         gkd->di.priv = vol;
1078         gkd->di.blocksize = vol->v_sectorsize;
1079         gkd->di.maxiosize = DFLTPHYS;
1080         gkd->di.mediaoffset = gkd->offset;
1081         if ((gkd->offset + gkd->length) > vol->v_mediasize)
1082                 gkd->length = vol->v_mediasize - gkd->offset;
1083         gkd->di.mediasize = gkd->length;
1084         g_io_deliver(bp, 0);
1085 }
1086
1087 static void
1088 g_raid_candelete(struct g_raid_softc *sc, struct bio *bp)
1089 {
1090         struct g_provider *pp;
1091         struct g_raid_volume *vol;
1092         struct g_raid_subdisk *sd;
1093         int *val;
1094         int i;
1095
1096         val = (int *)bp->bio_data;
1097         pp = bp->bio_to;
1098         vol = pp->private;
1099         *val = 0;
1100         for (i = 0; i < vol->v_disks_count; i++) {
1101                 sd = &vol->v_subdisks[i];
1102                 if (sd->sd_state == G_RAID_SUBDISK_S_NONE)
1103                         continue;
1104                 if (sd->sd_disk->d_candelete) {
1105                         *val = 1;
1106                         break;
1107                 }
1108         }
1109         g_io_deliver(bp, 0);
1110 }
1111
1112 static void
1113 g_raid_start(struct bio *bp)
1114 {
1115         struct g_raid_softc *sc;
1116
1117         sc = bp->bio_to->geom->softc;
1118         /*
1119          * If sc == NULL or there are no valid disks, provider's error
1120          * should be set and g_raid_start() should not be called at all.
1121          */
1122 //      KASSERT(sc != NULL && sc->sc_state == G_RAID_VOLUME_S_RUNNING,
1123 //          ("Provider's error should be set (error=%d)(mirror=%s).",
1124 //          bp->bio_to->error, bp->bio_to->name));
1125         G_RAID_LOGREQ(3, bp, "Request received.");
1126
1127         switch (bp->bio_cmd) {
1128         case BIO_READ:
1129         case BIO_WRITE:
1130         case BIO_DELETE:
1131         case BIO_FLUSH:
1132                 break;
1133         case BIO_GETATTR:
1134                 if (!strcmp(bp->bio_attribute, "GEOM::candelete"))
1135                         g_raid_candelete(sc, bp);
1136                 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump"))
1137                         g_raid_kerneldump(sc, bp);
1138                 else
1139                         g_io_deliver(bp, EOPNOTSUPP);
1140                 return;
1141         default:
1142                 g_io_deliver(bp, EOPNOTSUPP);
1143                 return;
1144         }
1145         mtx_lock(&sc->sc_queue_mtx);
1146         bioq_insert_tail(&sc->sc_queue, bp);
1147         mtx_unlock(&sc->sc_queue_mtx);
1148         if (!dumping) {
1149                 G_RAID_DEBUG1(4, sc, "Waking up %p.", sc);
1150                 wakeup(sc);
1151         }
1152 }
1153
1154 static int
1155 g_raid_bio_overlaps(const struct bio *bp, off_t lstart, off_t len)
1156 {
1157         /*
1158          * 5 cases:
1159          * (1) bp entirely below NO
1160          * (2) bp entirely above NO
1161          * (3) bp start below, but end in range YES
1162          * (4) bp entirely within YES
1163          * (5) bp starts within, ends above YES
1164          *
1165          * lock range 10-19 (offset 10 length 10)
1166          * (1) 1-5: first if kicks it out
1167          * (2) 30-35: second if kicks it out
1168          * (3) 5-15: passes both ifs
1169          * (4) 12-14: passes both ifs
1170          * (5) 19-20: passes both
1171          */
1172         off_t lend = lstart + len - 1;
1173         off_t bstart = bp->bio_offset;
1174         off_t bend = bp->bio_offset + bp->bio_length - 1;
1175
1176         if (bend < lstart)
1177                 return (0);
1178         if (lend < bstart)
1179                 return (0);
1180         return (1);
1181 }
1182
1183 static int
1184 g_raid_is_in_locked_range(struct g_raid_volume *vol, const struct bio *bp)
1185 {
1186         struct g_raid_lock *lp;
1187
1188         sx_assert(&vol->v_softc->sc_lock, SX_LOCKED);
1189
1190         LIST_FOREACH(lp, &vol->v_locks, l_next) {
1191                 if (g_raid_bio_overlaps(bp, lp->l_offset, lp->l_length))
1192                         return (1);
1193         }
1194         return (0);
1195 }
1196
1197 static void
1198 g_raid_start_request(struct bio *bp)
1199 {
1200         struct g_raid_softc *sc;
1201         struct g_raid_volume *vol;
1202
1203         sc = bp->bio_to->geom->softc;
1204         sx_assert(&sc->sc_lock, SX_LOCKED);
1205         vol = bp->bio_to->private;
1206
1207         /*
1208          * Check to see if this item is in a locked range.  If so,
1209          * queue it to our locked queue and return.  We'll requeue
1210          * it when the range is unlocked.  Internal I/O for the
1211          * rebuild/rescan/recovery process is excluded from this
1212          * check so we can actually do the recovery.
1213          */
1214         if (!(bp->bio_cflags & G_RAID_BIO_FLAG_SPECIAL) &&
1215             g_raid_is_in_locked_range(vol, bp)) {
1216                 G_RAID_LOGREQ(3, bp, "Defer request.");
1217                 bioq_insert_tail(&vol->v_locked, bp);
1218                 return;
1219         }
1220
1221         /*
1222          * If we're actually going to do the write/delete, then
1223          * update the idle stats for the volume.
1224          */
1225         if (bp->bio_cmd == BIO_WRITE || bp->bio_cmd == BIO_DELETE) {
1226                 if (!vol->v_dirty)
1227                         g_raid_dirty(vol);
1228                 vol->v_writes++;
1229         }
1230
1231         /*
1232          * Put request onto inflight queue, so we can check if new
1233          * synchronization requests don't collide with it.  Then tell
1234          * the transformation layer to start the I/O.
1235          */
1236         bioq_insert_tail(&vol->v_inflight, bp);
1237         G_RAID_LOGREQ(4, bp, "Request started");
1238         G_RAID_TR_IOSTART(vol->v_tr, bp);
1239 }
1240
1241 static void
1242 g_raid_finish_with_locked_ranges(struct g_raid_volume *vol, struct bio *bp)
1243 {
1244         off_t off, len;
1245         struct bio *nbp;
1246         struct g_raid_lock *lp;
1247
1248         vol->v_pending_lock = 0;
1249         LIST_FOREACH(lp, &vol->v_locks, l_next) {
1250                 if (lp->l_pending) {
1251                         off = lp->l_offset;
1252                         len = lp->l_length;
1253                         lp->l_pending = 0;
1254                         TAILQ_FOREACH(nbp, &vol->v_inflight.queue, bio_queue) {
1255                                 if (g_raid_bio_overlaps(nbp, off, len))
1256                                         lp->l_pending++;
1257                         }
1258                         if (lp->l_pending) {
1259                                 vol->v_pending_lock = 1;
1260                                 G_RAID_DEBUG1(4, vol->v_softc,
1261                                     "Deferred lock(%jd, %jd) has %d pending",
1262                                     (intmax_t)off, (intmax_t)(off + len),
1263                                     lp->l_pending);
1264                                 continue;
1265                         }
1266                         G_RAID_DEBUG1(4, vol->v_softc,
1267                             "Deferred lock of %jd to %jd completed",
1268                             (intmax_t)off, (intmax_t)(off + len));
1269                         G_RAID_TR_LOCKED(vol->v_tr, lp->l_callback_arg);
1270                 }
1271         }
1272 }
1273
1274 void
1275 g_raid_iodone(struct bio *bp, int error)
1276 {
1277         struct g_raid_softc *sc;
1278         struct g_raid_volume *vol;
1279
1280         sc = bp->bio_to->geom->softc;
1281         sx_assert(&sc->sc_lock, SX_LOCKED);
1282         vol = bp->bio_to->private;
1283         G_RAID_LOGREQ(3, bp, "Request done: %d.", error);
1284
1285         /* Update stats if we done write/delete. */
1286         if (bp->bio_cmd == BIO_WRITE || bp->bio_cmd == BIO_DELETE) {
1287                 vol->v_writes--;
1288                 vol->v_last_write = time_uptime;
1289         }
1290
1291         bioq_remove(&vol->v_inflight, bp);
1292         if (vol->v_pending_lock && g_raid_is_in_locked_range(vol, bp))
1293                 g_raid_finish_with_locked_ranges(vol, bp);
1294         getmicrouptime(&vol->v_last_done);
1295         g_io_deliver(bp, error);
1296 }
1297
1298 int
1299 g_raid_lock_range(struct g_raid_volume *vol, off_t off, off_t len,
1300     struct bio *ignore, void *argp)
1301 {
1302         struct g_raid_softc *sc;
1303         struct g_raid_lock *lp;
1304         struct bio *bp;
1305
1306         sc = vol->v_softc;
1307         lp = malloc(sizeof(*lp), M_RAID, M_WAITOK | M_ZERO);
1308         LIST_INSERT_HEAD(&vol->v_locks, lp, l_next);
1309         lp->l_offset = off;
1310         lp->l_length = len;
1311         lp->l_callback_arg = argp;
1312
1313         lp->l_pending = 0;
1314         TAILQ_FOREACH(bp, &vol->v_inflight.queue, bio_queue) {
1315                 if (bp != ignore && g_raid_bio_overlaps(bp, off, len))
1316                         lp->l_pending++;
1317         }
1318
1319         /*
1320          * If there are any writes that are pending, we return EBUSY.  All
1321          * callers will have to wait until all pending writes clear.
1322          */
1323         if (lp->l_pending > 0) {
1324                 vol->v_pending_lock = 1;
1325                 G_RAID_DEBUG1(4, sc, "Locking range %jd to %jd deferred %d pend",
1326                     (intmax_t)off, (intmax_t)(off+len), lp->l_pending);
1327                 return (EBUSY);
1328         }
1329         G_RAID_DEBUG1(4, sc, "Locking range %jd to %jd",
1330             (intmax_t)off, (intmax_t)(off+len));
1331         G_RAID_TR_LOCKED(vol->v_tr, lp->l_callback_arg);
1332         return (0);
1333 }
1334
1335 int
1336 g_raid_unlock_range(struct g_raid_volume *vol, off_t off, off_t len)
1337 {
1338         struct g_raid_lock *lp;
1339         struct g_raid_softc *sc;
1340         struct bio *bp;
1341
1342         sc = vol->v_softc;
1343         LIST_FOREACH(lp, &vol->v_locks, l_next) {
1344                 if (lp->l_offset == off && lp->l_length == len) {
1345                         LIST_REMOVE(lp, l_next);
1346                         /* XXX
1347                          * Right now we just put them all back on the queue
1348                          * and hope for the best.  We hope this because any
1349                          * locked ranges will go right back on this list
1350                          * when the worker thread runs.
1351                          * XXX
1352                          */
1353                         G_RAID_DEBUG1(4, sc, "Unlocked %jd to %jd",
1354                             (intmax_t)lp->l_offset,
1355                             (intmax_t)(lp->l_offset+lp->l_length));
1356                         mtx_lock(&sc->sc_queue_mtx);
1357                         while ((bp = bioq_takefirst(&vol->v_locked)) != NULL)
1358                                 bioq_insert_tail(&sc->sc_queue, bp);
1359                         mtx_unlock(&sc->sc_queue_mtx);
1360                         free(lp, M_RAID);
1361                         return (0);
1362                 }
1363         }
1364         return (EINVAL);
1365 }
1366
1367 void
1368 g_raid_subdisk_iostart(struct g_raid_subdisk *sd, struct bio *bp)
1369 {
1370         struct g_consumer *cp;
1371         struct g_raid_disk *disk, *tdisk;
1372
1373         bp->bio_caller1 = sd;
1374
1375         /*
1376          * Make sure that the disk is present. Generally it is a task of
1377          * transformation layers to not send requests to absent disks, but
1378          * it is better to be safe and report situation then sorry.
1379          */
1380         if (sd->sd_disk == NULL) {
1381                 G_RAID_LOGREQ(0, bp, "Warning! I/O request to an absent disk!");
1382 nodisk:
1383                 bp->bio_from = NULL;
1384                 bp->bio_to = NULL;
1385                 bp->bio_error = ENXIO;
1386                 g_raid_disk_done(bp);
1387                 return;
1388         }
1389         disk = sd->sd_disk;
1390         if (disk->d_state != G_RAID_DISK_S_ACTIVE &&
1391             disk->d_state != G_RAID_DISK_S_FAILED) {
1392                 G_RAID_LOGREQ(0, bp, "Warning! I/O request to a disk in a "
1393                     "wrong state (%s)!", g_raid_disk_state2str(disk->d_state));
1394                 goto nodisk;
1395         }
1396
1397         cp = disk->d_consumer;
1398         bp->bio_from = cp;
1399         bp->bio_to = cp->provider;
1400         cp->index++;
1401
1402         /* Update average disks load. */
1403         TAILQ_FOREACH(tdisk, &sd->sd_softc->sc_disks, d_next) {
1404                 if (tdisk->d_consumer == NULL)
1405                         tdisk->d_load = 0;
1406                 else
1407                         tdisk->d_load = (tdisk->d_consumer->index *
1408                             G_RAID_SUBDISK_LOAD_SCALE + tdisk->d_load * 7) / 8;
1409         }
1410
1411         disk->d_last_offset = bp->bio_offset + bp->bio_length;
1412         if (dumping) {
1413                 G_RAID_LOGREQ(3, bp, "Sending dumping request.");
1414                 if (bp->bio_cmd == BIO_WRITE) {
1415                         bp->bio_error = g_raid_subdisk_kerneldump(sd,
1416                             bp->bio_data, 0, bp->bio_offset, bp->bio_length);
1417                 } else
1418                         bp->bio_error = EOPNOTSUPP;
1419                 g_raid_disk_done(bp);
1420         } else {
1421                 bp->bio_done = g_raid_disk_done;
1422                 bp->bio_offset += sd->sd_offset;
1423                 G_RAID_LOGREQ(3, bp, "Sending request.");
1424                 g_io_request(bp, cp);
1425         }
1426 }
1427
1428 int
1429 g_raid_subdisk_kerneldump(struct g_raid_subdisk *sd,
1430     void *virtual, vm_offset_t physical, off_t offset, size_t length)
1431 {
1432
1433         if (sd->sd_disk == NULL)
1434                 return (ENXIO);
1435         if (sd->sd_disk->d_kd.di.dumper == NULL)
1436                 return (EOPNOTSUPP);
1437         return (dump_write(&sd->sd_disk->d_kd.di,
1438             virtual, physical,
1439             sd->sd_disk->d_kd.di.mediaoffset + sd->sd_offset + offset,
1440             length));
1441 }
1442
1443 static void
1444 g_raid_disk_done(struct bio *bp)
1445 {
1446         struct g_raid_softc *sc;
1447         struct g_raid_subdisk *sd;
1448
1449         sd = bp->bio_caller1;
1450         sc = sd->sd_softc;
1451         mtx_lock(&sc->sc_queue_mtx);
1452         bioq_insert_tail(&sc->sc_queue, bp);
1453         mtx_unlock(&sc->sc_queue_mtx);
1454         if (!dumping)
1455                 wakeup(sc);
1456 }
1457
1458 static void
1459 g_raid_disk_done_request(struct bio *bp)
1460 {
1461         struct g_raid_softc *sc;
1462         struct g_raid_disk *disk;
1463         struct g_raid_subdisk *sd;
1464         struct g_raid_volume *vol;
1465
1466         g_topology_assert_not();
1467
1468         G_RAID_LOGREQ(3, bp, "Disk request done: %d.", bp->bio_error);
1469         sd = bp->bio_caller1;
1470         sc = sd->sd_softc;
1471         vol = sd->sd_volume;
1472         if (bp->bio_from != NULL) {
1473                 bp->bio_from->index--;
1474                 disk = bp->bio_from->private;
1475                 if (disk == NULL)
1476                         g_raid_kill_consumer(sc, bp->bio_from);
1477         }
1478         bp->bio_offset -= sd->sd_offset;
1479
1480         G_RAID_TR_IODONE(vol->v_tr, sd, bp);
1481 }
1482
1483 static void
1484 g_raid_handle_event(struct g_raid_softc *sc, struct g_raid_event *ep)
1485 {
1486
1487         if ((ep->e_flags & G_RAID_EVENT_VOLUME) != 0)
1488                 ep->e_error = g_raid_update_volume(ep->e_tgt, ep->e_event);
1489         else if ((ep->e_flags & G_RAID_EVENT_DISK) != 0)
1490                 ep->e_error = g_raid_update_disk(ep->e_tgt, ep->e_event);
1491         else if ((ep->e_flags & G_RAID_EVENT_SUBDISK) != 0)
1492                 ep->e_error = g_raid_update_subdisk(ep->e_tgt, ep->e_event);
1493         else
1494                 ep->e_error = g_raid_update_node(ep->e_tgt, ep->e_event);
1495         if ((ep->e_flags & G_RAID_EVENT_WAIT) == 0) {
1496                 KASSERT(ep->e_error == 0,
1497                     ("Error cannot be handled."));
1498                 g_raid_event_free(ep);
1499         } else {
1500                 ep->e_flags |= G_RAID_EVENT_DONE;
1501                 G_RAID_DEBUG1(4, sc, "Waking up %p.", ep);
1502                 mtx_lock(&sc->sc_queue_mtx);
1503                 wakeup(ep);
1504                 mtx_unlock(&sc->sc_queue_mtx);
1505         }
1506 }
1507
1508 /*
1509  * Worker thread.
1510  */
1511 static void
1512 g_raid_worker(void *arg)
1513 {
1514         struct g_raid_softc *sc;
1515         struct g_raid_event *ep;
1516         struct g_raid_volume *vol;
1517         struct bio *bp;
1518         struct timeval now, t;
1519         int timeout, rv;
1520
1521         sc = arg;
1522         thread_lock(curthread);
1523         sched_prio(curthread, PRIBIO);
1524         thread_unlock(curthread);
1525
1526         sx_xlock(&sc->sc_lock);
1527         for (;;) {
1528                 mtx_lock(&sc->sc_queue_mtx);
1529                 /*
1530                  * First take a look at events.
1531                  * This is important to handle events before any I/O requests.
1532                  */
1533                 bp = NULL;
1534                 vol = NULL;
1535                 rv = 0;
1536                 ep = TAILQ_FIRST(&sc->sc_events);
1537                 if (ep != NULL)
1538                         TAILQ_REMOVE(&sc->sc_events, ep, e_next);
1539                 else if ((bp = bioq_takefirst(&sc->sc_queue)) != NULL)
1540                         ;
1541                 else {
1542                         getmicrouptime(&now);
1543                         t = now;
1544                         TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) {
1545                                 if (bioq_first(&vol->v_inflight) == NULL &&
1546                                     vol->v_tr &&
1547                                     timevalcmp(&vol->v_last_done, &t, < ))
1548                                         t = vol->v_last_done;
1549                         }
1550                         timevalsub(&t, &now);
1551                         timeout = g_raid_idle_threshold +
1552                             t.tv_sec * 1000000 + t.tv_usec;
1553                         if (timeout > 0) {
1554                                 /*
1555                                  * Two steps to avoid overflows at HZ=1000
1556                                  * and idle timeouts > 2.1s.  Some rounding
1557                                  * errors can occur, but they are < 1tick,
1558                                  * which is deemed to be close enough for
1559                                  * this purpose.
1560                                  */
1561                                 int micpertic = 1000000 / hz;
1562                                 timeout = (timeout + micpertic - 1) / micpertic;
1563                                 sx_xunlock(&sc->sc_lock);
1564                                 MSLEEP(rv, sc, &sc->sc_queue_mtx,
1565                                     PRIBIO | PDROP, "-", timeout);
1566                                 sx_xlock(&sc->sc_lock);
1567                                 goto process;
1568                         } else
1569                                 rv = EWOULDBLOCK;
1570                 }
1571                 mtx_unlock(&sc->sc_queue_mtx);
1572 process:
1573                 if (ep != NULL) {
1574                         g_raid_handle_event(sc, ep);
1575                 } else if (bp != NULL) {
1576                         if (bp->bio_to != NULL &&
1577                             bp->bio_to->geom == sc->sc_geom)
1578                                 g_raid_start_request(bp);
1579                         else
1580                                 g_raid_disk_done_request(bp);
1581                 } else if (rv == EWOULDBLOCK) {
1582                         TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) {
1583                                 g_raid_clean(vol, -1);
1584                                 if (bioq_first(&vol->v_inflight) == NULL &&
1585                                     vol->v_tr) {
1586                                         t.tv_sec = g_raid_idle_threshold / 1000000;
1587                                         t.tv_usec = g_raid_idle_threshold % 1000000;
1588                                         timevaladd(&t, &vol->v_last_done);
1589                                         getmicrouptime(&now);
1590                                         if (timevalcmp(&t, &now, <= )) {
1591                                                 G_RAID_TR_IDLE(vol->v_tr);
1592                                                 vol->v_last_done = now;
1593                                         }
1594                                 }
1595                         }
1596                 }
1597                 if (sc->sc_stopping == G_RAID_DESTROY_HARD)
1598                         g_raid_destroy_node(sc, 1);     /* May not return. */
1599         }
1600 }
1601
1602 static void
1603 g_raid_poll(struct g_raid_softc *sc)
1604 {
1605         struct g_raid_event *ep;
1606         struct bio *bp;
1607
1608         sx_xlock(&sc->sc_lock);
1609         mtx_lock(&sc->sc_queue_mtx);
1610         /*
1611          * First take a look at events.
1612          * This is important to handle events before any I/O requests.
1613          */
1614         ep = TAILQ_FIRST(&sc->sc_events);
1615         if (ep != NULL) {
1616                 TAILQ_REMOVE(&sc->sc_events, ep, e_next);
1617                 mtx_unlock(&sc->sc_queue_mtx);
1618                 g_raid_handle_event(sc, ep);
1619                 goto out;
1620         }
1621         bp = bioq_takefirst(&sc->sc_queue);
1622         if (bp != NULL) {
1623                 mtx_unlock(&sc->sc_queue_mtx);
1624                 if (bp->bio_from == NULL ||
1625                     bp->bio_from->geom != sc->sc_geom)
1626                         g_raid_start_request(bp);
1627                 else
1628                         g_raid_disk_done_request(bp);
1629         }
1630 out:
1631         sx_xunlock(&sc->sc_lock);
1632 }
1633
1634 static void
1635 g_raid_launch_provider(struct g_raid_volume *vol)
1636 {
1637         struct g_raid_disk *disk;
1638         struct g_raid_subdisk *sd;
1639         struct g_raid_softc *sc;
1640         struct g_provider *pp;
1641         char name[G_RAID_MAX_VOLUMENAME];
1642         char   announce_buf[80], buf1[32];
1643         off_t off;
1644         int i;
1645
1646         sc = vol->v_softc;
1647         sx_assert(&sc->sc_lock, SX_LOCKED);
1648
1649         g_topology_lock();
1650         /* Try to name provider with volume name. */
1651         snprintf(name, sizeof(name), "raid/%s", vol->v_name);
1652         if (g_raid_name_format == 0 || vol->v_name[0] == 0 ||
1653             g_provider_by_name(name) != NULL) {
1654                 /* Otherwise use sequential volume number. */
1655                 snprintf(name, sizeof(name), "raid/r%d", vol->v_global_id);
1656         }
1657
1658         /*
1659          * Create a /dev/ar%d that the old ataraid(4) stack once
1660          * created as an alias for /dev/raid/r%d if requested.
1661          * This helps going from stable/7 ataraid devices to newer
1662          * FreeBSD releases. sbruno 07 MAY 2013
1663          */
1664
1665         if (ar_legacy_aliases) {
1666                 snprintf(announce_buf, sizeof(announce_buf),
1667                         "kern.devalias.%s", name);
1668                 snprintf(buf1, sizeof(buf1),
1669                         "ar%d", vol->v_global_id);
1670                 setenv(announce_buf, buf1);
1671         }
1672
1673         pp = g_new_providerf(sc->sc_geom, "%s", name);
1674         pp->flags |= G_PF_DIRECT_RECEIVE;
1675         if (vol->v_tr->tro_class->trc_accept_unmapped) {
1676                 pp->flags |= G_PF_ACCEPT_UNMAPPED;
1677                 for (i = 0; i < vol->v_disks_count; i++) {
1678                         sd = &vol->v_subdisks[i];
1679                         if (sd->sd_state == G_RAID_SUBDISK_S_NONE)
1680                                 continue;
1681                         if ((sd->sd_disk->d_consumer->provider->flags &
1682                             G_PF_ACCEPT_UNMAPPED) == 0)
1683                                 pp->flags &= ~G_PF_ACCEPT_UNMAPPED;
1684                 }
1685         }
1686         pp->private = vol;
1687         pp->mediasize = vol->v_mediasize;
1688         pp->sectorsize = vol->v_sectorsize;
1689         pp->stripesize = 0;
1690         pp->stripeoffset = 0;
1691         if (vol->v_raid_level == G_RAID_VOLUME_RL_RAID1 ||
1692             vol->v_raid_level == G_RAID_VOLUME_RL_RAID3 ||
1693             vol->v_raid_level == G_RAID_VOLUME_RL_SINGLE ||
1694             vol->v_raid_level == G_RAID_VOLUME_RL_CONCAT) {
1695                 if ((disk = vol->v_subdisks[0].sd_disk) != NULL &&
1696                     disk->d_consumer != NULL &&
1697                     disk->d_consumer->provider != NULL) {
1698                         pp->stripesize = disk->d_consumer->provider->stripesize;
1699                         off = disk->d_consumer->provider->stripeoffset;
1700                         pp->stripeoffset = off + vol->v_subdisks[0].sd_offset;
1701                         if (off > 0)
1702                                 pp->stripeoffset %= off;
1703                 }
1704                 if (vol->v_raid_level == G_RAID_VOLUME_RL_RAID3) {
1705                         pp->stripesize *= (vol->v_disks_count - 1);
1706                         pp->stripeoffset *= (vol->v_disks_count - 1);
1707                 }
1708         } else
1709                 pp->stripesize = vol->v_strip_size;
1710         vol->v_provider = pp;
1711         g_error_provider(pp, 0);
1712         g_topology_unlock();
1713         G_RAID_DEBUG1(0, sc, "Provider %s for volume %s created.",
1714             pp->name, vol->v_name);
1715 }
1716
1717 static void
1718 g_raid_destroy_provider(struct g_raid_volume *vol)
1719 {
1720         struct g_raid_softc *sc;
1721         struct g_provider *pp;
1722         struct bio *bp, *tmp;
1723
1724         g_topology_assert_not();
1725         sc = vol->v_softc;
1726         pp = vol->v_provider;
1727         KASSERT(pp != NULL, ("NULL provider (volume=%s).", vol->v_name));
1728
1729         g_topology_lock();
1730         g_error_provider(pp, ENXIO);
1731         mtx_lock(&sc->sc_queue_mtx);
1732         TAILQ_FOREACH_SAFE(bp, &sc->sc_queue.queue, bio_queue, tmp) {
1733                 if (bp->bio_to != pp)
1734                         continue;
1735                 bioq_remove(&sc->sc_queue, bp);
1736                 g_io_deliver(bp, ENXIO);
1737         }
1738         mtx_unlock(&sc->sc_queue_mtx);
1739         G_RAID_DEBUG1(0, sc, "Provider %s for volume %s destroyed.",
1740             pp->name, vol->v_name);
1741         g_wither_provider(pp, ENXIO);
1742         g_topology_unlock();
1743         vol->v_provider = NULL;
1744 }
1745
1746 /*
1747  * Update device state.
1748  */
1749 static int
1750 g_raid_update_volume(struct g_raid_volume *vol, u_int event)
1751 {
1752         struct g_raid_softc *sc;
1753
1754         sc = vol->v_softc;
1755         sx_assert(&sc->sc_lock, SX_XLOCKED);
1756
1757         G_RAID_DEBUG1(2, sc, "Event %s for volume %s.",
1758             g_raid_volume_event2str(event),
1759             vol->v_name);
1760         switch (event) {
1761         case G_RAID_VOLUME_E_DOWN:
1762                 if (vol->v_provider != NULL)
1763                         g_raid_destroy_provider(vol);
1764                 break;
1765         case G_RAID_VOLUME_E_UP:
1766                 if (vol->v_provider == NULL)
1767                         g_raid_launch_provider(vol);
1768                 break;
1769         case G_RAID_VOLUME_E_START:
1770                 if (vol->v_tr)
1771                         G_RAID_TR_START(vol->v_tr);
1772                 return (0);
1773         default:
1774                 if (sc->sc_md)
1775                         G_RAID_MD_VOLUME_EVENT(sc->sc_md, vol, event);
1776                 return (0);
1777         }
1778
1779         /* Manage root mount release. */
1780         if (vol->v_starting) {
1781                 vol->v_starting = 0;
1782                 G_RAID_DEBUG1(1, sc, "root_mount_rel %p", vol->v_rootmount);
1783                 root_mount_rel(vol->v_rootmount);
1784                 vol->v_rootmount = NULL;
1785         }
1786         if (vol->v_stopping && vol->v_provider_open == 0)
1787                 g_raid_destroy_volume(vol);
1788         return (0);
1789 }
1790
1791 /*
1792  * Update subdisk state.
1793  */
1794 static int
1795 g_raid_update_subdisk(struct g_raid_subdisk *sd, u_int event)
1796 {
1797         struct g_raid_softc *sc;
1798         struct g_raid_volume *vol;
1799
1800         sc = sd->sd_softc;
1801         vol = sd->sd_volume;
1802         sx_assert(&sc->sc_lock, SX_XLOCKED);
1803
1804         G_RAID_DEBUG1(2, sc, "Event %s for subdisk %s:%d-%s.",
1805             g_raid_subdisk_event2str(event),
1806             vol->v_name, sd->sd_pos,
1807             sd->sd_disk ? g_raid_get_diskname(sd->sd_disk) : "[none]");
1808         if (vol->v_tr)
1809                 G_RAID_TR_EVENT(vol->v_tr, sd, event);
1810
1811         return (0);
1812 }
1813
1814 /*
1815  * Update disk state.
1816  */
1817 static int
1818 g_raid_update_disk(struct g_raid_disk *disk, u_int event)
1819 {
1820         struct g_raid_softc *sc;
1821
1822         sc = disk->d_softc;
1823         sx_assert(&sc->sc_lock, SX_XLOCKED);
1824
1825         G_RAID_DEBUG1(2, sc, "Event %s for disk %s.",
1826             g_raid_disk_event2str(event),
1827             g_raid_get_diskname(disk));
1828
1829         if (sc->sc_md)
1830                 G_RAID_MD_EVENT(sc->sc_md, disk, event);
1831         return (0);
1832 }
1833
1834 /*
1835  * Node event.
1836  */
1837 static int
1838 g_raid_update_node(struct g_raid_softc *sc, u_int event)
1839 {
1840         sx_assert(&sc->sc_lock, SX_XLOCKED);
1841
1842         G_RAID_DEBUG1(2, sc, "Event %s for the array.",
1843             g_raid_node_event2str(event));
1844
1845         if (event == G_RAID_NODE_E_WAKE)
1846                 return (0);
1847         if (sc->sc_md)
1848                 G_RAID_MD_EVENT(sc->sc_md, NULL, event);
1849         return (0);
1850 }
1851
1852 static int
1853 g_raid_access(struct g_provider *pp, int acr, int acw, int ace)
1854 {
1855         struct g_raid_volume *vol;
1856         struct g_raid_softc *sc;
1857         int dcw, opens, error = 0;
1858
1859         g_topology_assert();
1860         sc = pp->geom->softc;
1861         vol = pp->private;
1862         KASSERT(sc != NULL, ("NULL softc (provider=%s).", pp->name));
1863         KASSERT(vol != NULL, ("NULL volume (provider=%s).", pp->name));
1864
1865         G_RAID_DEBUG1(2, sc, "Access request for %s: r%dw%de%d.", pp->name,
1866             acr, acw, ace);
1867         dcw = pp->acw + acw;
1868
1869         g_topology_unlock();
1870         sx_xlock(&sc->sc_lock);
1871         /* Deny new opens while dying. */
1872         if (sc->sc_stopping != 0 && (acr > 0 || acw > 0 || ace > 0)) {
1873                 error = ENXIO;
1874                 goto out;
1875         }
1876         /* Deny write opens for read-only volumes. */
1877         if (vol->v_read_only && acw > 0) {
1878                 error = EROFS;
1879                 goto out;
1880         }
1881         if (dcw == 0)
1882                 g_raid_clean(vol, dcw);
1883         vol->v_provider_open += acr + acw + ace;
1884         /* Handle delayed node destruction. */
1885         if (sc->sc_stopping == G_RAID_DESTROY_DELAYED &&
1886             vol->v_provider_open == 0) {
1887                 /* Count open volumes. */
1888                 opens = g_raid_nopens(sc);
1889                 if (opens == 0) {
1890                         sc->sc_stopping = G_RAID_DESTROY_HARD;
1891                         /* Wake up worker to make it selfdestruct. */
1892                         g_raid_event_send(sc, G_RAID_NODE_E_WAKE, 0);
1893                 }
1894         }
1895         /* Handle open volume destruction. */
1896         if (vol->v_stopping && vol->v_provider_open == 0)
1897                 g_raid_destroy_volume(vol);
1898 out:
1899         sx_xunlock(&sc->sc_lock);
1900         g_topology_lock();
1901         return (error);
1902 }
1903
1904 struct g_raid_softc *
1905 g_raid_create_node(struct g_class *mp,
1906     const char *name, struct g_raid_md_object *md)
1907 {
1908         struct g_raid_softc *sc;
1909         struct g_geom *gp;
1910         int error;
1911
1912         g_topology_assert();
1913         G_RAID_DEBUG(1, "Creating array %s.", name);
1914
1915         gp = g_new_geomf(mp, "%s", name);
1916         sc = malloc(sizeof(*sc), M_RAID, M_WAITOK | M_ZERO);
1917         gp->start = g_raid_start;
1918         gp->orphan = g_raid_orphan;
1919         gp->access = g_raid_access;
1920         gp->dumpconf = g_raid_dumpconf;
1921
1922         sc->sc_md = md;
1923         sc->sc_geom = gp;
1924         sc->sc_flags = 0;
1925         TAILQ_INIT(&sc->sc_volumes);
1926         TAILQ_INIT(&sc->sc_disks);
1927         sx_init(&sc->sc_lock, "graid:lock");
1928         mtx_init(&sc->sc_queue_mtx, "graid:queue", NULL, MTX_DEF);
1929         TAILQ_INIT(&sc->sc_events);
1930         bioq_init(&sc->sc_queue);
1931         gp->softc = sc;
1932         error = kproc_create(g_raid_worker, sc, &sc->sc_worker, 0, 0,
1933             "g_raid %s", name);
1934         if (error != 0) {
1935                 G_RAID_DEBUG(0, "Cannot create kernel thread for %s.", name);
1936                 mtx_destroy(&sc->sc_queue_mtx);
1937                 sx_destroy(&sc->sc_lock);
1938                 g_destroy_geom(sc->sc_geom);
1939                 free(sc, M_RAID);
1940                 return (NULL);
1941         }
1942
1943         G_RAID_DEBUG1(0, sc, "Array %s created.", name);
1944         return (sc);
1945 }
1946
1947 struct g_raid_volume *
1948 g_raid_create_volume(struct g_raid_softc *sc, const char *name, int id)
1949 {
1950         struct g_raid_volume    *vol, *vol1;
1951         int i;
1952
1953         G_RAID_DEBUG1(1, sc, "Creating volume %s.", name);
1954         vol = malloc(sizeof(*vol), M_RAID, M_WAITOK | M_ZERO);
1955         vol->v_softc = sc;
1956         strlcpy(vol->v_name, name, G_RAID_MAX_VOLUMENAME);
1957         vol->v_state = G_RAID_VOLUME_S_STARTING;
1958         vol->v_raid_level = G_RAID_VOLUME_RL_UNKNOWN;
1959         vol->v_raid_level_qualifier = G_RAID_VOLUME_RLQ_UNKNOWN;
1960         vol->v_rotate_parity = 1;
1961         bioq_init(&vol->v_inflight);
1962         bioq_init(&vol->v_locked);
1963         LIST_INIT(&vol->v_locks);
1964         for (i = 0; i < G_RAID_MAX_SUBDISKS; i++) {
1965                 vol->v_subdisks[i].sd_softc = sc;
1966                 vol->v_subdisks[i].sd_volume = vol;
1967                 vol->v_subdisks[i].sd_pos = i;
1968                 vol->v_subdisks[i].sd_state = G_RAID_DISK_S_NONE;
1969         }
1970
1971         /* Find free ID for this volume. */
1972         g_topology_lock();
1973         vol1 = vol;
1974         if (id >= 0) {
1975                 LIST_FOREACH(vol1, &g_raid_volumes, v_global_next) {
1976                         if (vol1->v_global_id == id)
1977                                 break;
1978                 }
1979         }
1980         if (vol1 != NULL) {
1981                 for (id = 0; ; id++) {
1982                         LIST_FOREACH(vol1, &g_raid_volumes, v_global_next) {
1983                                 if (vol1->v_global_id == id)
1984                                         break;
1985                         }
1986                         if (vol1 == NULL)
1987                                 break;
1988                 }
1989         }
1990         vol->v_global_id = id;
1991         LIST_INSERT_HEAD(&g_raid_volumes, vol, v_global_next);
1992         g_topology_unlock();
1993
1994         /* Delay root mounting. */
1995         vol->v_rootmount = root_mount_hold("GRAID");
1996         G_RAID_DEBUG1(1, sc, "root_mount_hold %p", vol->v_rootmount);
1997         vol->v_starting = 1;
1998         TAILQ_INSERT_TAIL(&sc->sc_volumes, vol, v_next);
1999         return (vol);
2000 }
2001
2002 struct g_raid_disk *
2003 g_raid_create_disk(struct g_raid_softc *sc)
2004 {
2005         struct g_raid_disk      *disk;
2006
2007         G_RAID_DEBUG1(1, sc, "Creating disk.");
2008         disk = malloc(sizeof(*disk), M_RAID, M_WAITOK | M_ZERO);
2009         disk->d_softc = sc;
2010         disk->d_state = G_RAID_DISK_S_NONE;
2011         TAILQ_INIT(&disk->d_subdisks);
2012         TAILQ_INSERT_TAIL(&sc->sc_disks, disk, d_next);
2013         return (disk);
2014 }
2015
2016 int g_raid_start_volume(struct g_raid_volume *vol)
2017 {
2018         struct g_raid_tr_class *class;
2019         struct g_raid_tr_object *obj;
2020         int status;
2021
2022         G_RAID_DEBUG1(2, vol->v_softc, "Starting volume %s.", vol->v_name);
2023         LIST_FOREACH(class, &g_raid_tr_classes, trc_list) {
2024                 if (!class->trc_enable)
2025                         continue;
2026                 G_RAID_DEBUG1(2, vol->v_softc,
2027                     "Tasting volume %s for %s transformation.",
2028                     vol->v_name, class->name);
2029                 obj = (void *)kobj_create((kobj_class_t)class, M_RAID,
2030                     M_WAITOK);
2031                 obj->tro_class = class;
2032                 obj->tro_volume = vol;
2033                 status = G_RAID_TR_TASTE(obj, vol);
2034                 if (status != G_RAID_TR_TASTE_FAIL)
2035                         break;
2036                 kobj_delete((kobj_t)obj, M_RAID);
2037         }
2038         if (class == NULL) {
2039                 G_RAID_DEBUG1(0, vol->v_softc,
2040                     "No transformation module found for %s.",
2041                     vol->v_name);
2042                 vol->v_tr = NULL;
2043                 g_raid_change_volume_state(vol, G_RAID_VOLUME_S_UNSUPPORTED);
2044                 g_raid_event_send(vol, G_RAID_VOLUME_E_DOWN,
2045                     G_RAID_EVENT_VOLUME);
2046                 return (-1);
2047         }
2048         G_RAID_DEBUG1(2, vol->v_softc,
2049             "Transformation module %s chosen for %s.",
2050             class->name, vol->v_name);
2051         vol->v_tr = obj;
2052         return (0);
2053 }
2054
2055 int
2056 g_raid_destroy_node(struct g_raid_softc *sc, int worker)
2057 {
2058         struct g_raid_volume *vol, *tmpv;
2059         struct g_raid_disk *disk, *tmpd;
2060         int error = 0;
2061
2062         sc->sc_stopping = G_RAID_DESTROY_HARD;
2063         TAILQ_FOREACH_SAFE(vol, &sc->sc_volumes, v_next, tmpv) {
2064                 if (g_raid_destroy_volume(vol))
2065                         error = EBUSY;
2066         }
2067         if (error)
2068                 return (error);
2069         TAILQ_FOREACH_SAFE(disk, &sc->sc_disks, d_next, tmpd) {
2070                 if (g_raid_destroy_disk(disk))
2071                         error = EBUSY;
2072         }
2073         if (error)
2074                 return (error);
2075         if (sc->sc_md) {
2076                 G_RAID_MD_FREE(sc->sc_md);
2077                 kobj_delete((kobj_t)sc->sc_md, M_RAID);
2078                 sc->sc_md = NULL;
2079         }
2080         if (sc->sc_geom != NULL) {
2081                 G_RAID_DEBUG1(0, sc, "Array %s destroyed.", sc->sc_name);
2082                 g_topology_lock();
2083                 sc->sc_geom->softc = NULL;
2084                 g_wither_geom(sc->sc_geom, ENXIO);
2085                 g_topology_unlock();
2086                 sc->sc_geom = NULL;
2087         } else
2088                 G_RAID_DEBUG(1, "Array destroyed.");
2089         if (worker) {
2090                 g_raid_event_cancel(sc, sc);
2091                 mtx_destroy(&sc->sc_queue_mtx);
2092                 sx_xunlock(&sc->sc_lock);
2093                 sx_destroy(&sc->sc_lock);
2094                 wakeup(&sc->sc_stopping);
2095                 free(sc, M_RAID);
2096                 curthread->td_pflags &= ~TDP_GEOM;
2097                 G_RAID_DEBUG(1, "Thread exiting.");
2098                 kproc_exit(0);
2099         } else {
2100                 /* Wake up worker to make it selfdestruct. */
2101                 g_raid_event_send(sc, G_RAID_NODE_E_WAKE, 0);
2102         }
2103         return (0);
2104 }
2105
2106 int
2107 g_raid_destroy_volume(struct g_raid_volume *vol)
2108 {
2109         struct g_raid_softc *sc;
2110         struct g_raid_disk *disk;
2111         int i;
2112
2113         sc = vol->v_softc;
2114         G_RAID_DEBUG1(2, sc, "Destroying volume %s.", vol->v_name);
2115         vol->v_stopping = 1;
2116         if (vol->v_state != G_RAID_VOLUME_S_STOPPED) {
2117                 if (vol->v_tr) {
2118                         G_RAID_TR_STOP(vol->v_tr);
2119                         return (EBUSY);
2120                 } else
2121                         vol->v_state = G_RAID_VOLUME_S_STOPPED;
2122         }
2123         if (g_raid_event_check(sc, vol) != 0)
2124                 return (EBUSY);
2125         if (vol->v_provider != NULL)
2126                 return (EBUSY);
2127         if (vol->v_provider_open != 0)
2128                 return (EBUSY);
2129         if (vol->v_tr) {
2130                 G_RAID_TR_FREE(vol->v_tr);
2131                 kobj_delete((kobj_t)vol->v_tr, M_RAID);
2132                 vol->v_tr = NULL;
2133         }
2134         if (vol->v_rootmount)
2135                 root_mount_rel(vol->v_rootmount);
2136         g_topology_lock();
2137         LIST_REMOVE(vol, v_global_next);
2138         g_topology_unlock();
2139         TAILQ_REMOVE(&sc->sc_volumes, vol, v_next);
2140         for (i = 0; i < G_RAID_MAX_SUBDISKS; i++) {
2141                 g_raid_event_cancel(sc, &vol->v_subdisks[i]);
2142                 disk = vol->v_subdisks[i].sd_disk;
2143                 if (disk == NULL)
2144                         continue;
2145                 TAILQ_REMOVE(&disk->d_subdisks, &vol->v_subdisks[i], sd_next);
2146         }
2147         G_RAID_DEBUG1(2, sc, "Volume %s destroyed.", vol->v_name);
2148         if (sc->sc_md)
2149                 G_RAID_MD_FREE_VOLUME(sc->sc_md, vol);
2150         g_raid_event_cancel(sc, vol);
2151         free(vol, M_RAID);
2152         if (sc->sc_stopping == G_RAID_DESTROY_HARD) {
2153                 /* Wake up worker to let it selfdestruct. */
2154                 g_raid_event_send(sc, G_RAID_NODE_E_WAKE, 0);
2155         }
2156         return (0);
2157 }
2158
2159 int
2160 g_raid_destroy_disk(struct g_raid_disk *disk)
2161 {
2162         struct g_raid_softc *sc;
2163         struct g_raid_subdisk *sd, *tmp;
2164
2165         sc = disk->d_softc;
2166         G_RAID_DEBUG1(2, sc, "Destroying disk.");
2167         if (disk->d_consumer) {
2168                 g_raid_kill_consumer(sc, disk->d_consumer);
2169                 disk->d_consumer = NULL;
2170         }
2171         TAILQ_FOREACH_SAFE(sd, &disk->d_subdisks, sd_next, tmp) {
2172                 g_raid_change_subdisk_state(sd, G_RAID_SUBDISK_S_NONE);
2173                 g_raid_event_send(sd, G_RAID_SUBDISK_E_DISCONNECTED,
2174                     G_RAID_EVENT_SUBDISK);
2175                 TAILQ_REMOVE(&disk->d_subdisks, sd, sd_next);
2176                 sd->sd_disk = NULL;
2177         }
2178         TAILQ_REMOVE(&sc->sc_disks, disk, d_next);
2179         if (sc->sc_md)
2180                 G_RAID_MD_FREE_DISK(sc->sc_md, disk);
2181         g_raid_event_cancel(sc, disk);
2182         free(disk, M_RAID);
2183         return (0);
2184 }
2185
2186 int
2187 g_raid_destroy(struct g_raid_softc *sc, int how)
2188 {
2189         int error, opens;
2190
2191         g_topology_assert_not();
2192         if (sc == NULL)
2193                 return (ENXIO);
2194         sx_assert(&sc->sc_lock, SX_XLOCKED);
2195
2196         /* Count open volumes. */
2197         opens = g_raid_nopens(sc);
2198
2199         /* React on some opened volumes. */
2200         if (opens > 0) {
2201                 switch (how) {
2202                 case G_RAID_DESTROY_SOFT:
2203                         G_RAID_DEBUG1(1, sc,
2204                             "%d volumes are still open.",
2205                             opens);
2206                         sx_xunlock(&sc->sc_lock);
2207                         return (EBUSY);
2208                 case G_RAID_DESTROY_DELAYED:
2209                         G_RAID_DEBUG1(1, sc,
2210                             "Array will be destroyed on last close.");
2211                         sc->sc_stopping = G_RAID_DESTROY_DELAYED;
2212                         sx_xunlock(&sc->sc_lock);
2213                         return (EBUSY);
2214                 case G_RAID_DESTROY_HARD:
2215                         G_RAID_DEBUG1(1, sc,
2216                             "%d volumes are still open.",
2217                             opens);
2218                 }
2219         }
2220
2221         /* Mark node for destruction. */
2222         sc->sc_stopping = G_RAID_DESTROY_HARD;
2223         /* Wake up worker to let it selfdestruct. */
2224         g_raid_event_send(sc, G_RAID_NODE_E_WAKE, 0);
2225         /* Sleep until node destroyed. */
2226         error = sx_sleep(&sc->sc_stopping, &sc->sc_lock,
2227             PRIBIO | PDROP, "r:destroy", hz * 3);
2228         return (error == EWOULDBLOCK ? EBUSY : 0);
2229 }
2230
2231 static void
2232 g_raid_taste_orphan(struct g_consumer *cp)
2233 {
2234
2235         KASSERT(1 == 0, ("%s called while tasting %s.", __func__,
2236             cp->provider->name));
2237 }
2238
2239 static struct g_geom *
2240 g_raid_taste(struct g_class *mp, struct g_provider *pp, int flags __unused)
2241 {
2242         struct g_consumer *cp;
2243         struct g_geom *gp, *geom;
2244         struct g_raid_md_class *class;
2245         struct g_raid_md_object *obj;
2246         int status;
2247
2248         g_topology_assert();
2249         g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name);
2250         if (!g_raid_enable)
2251                 return (NULL);
2252         G_RAID_DEBUG(2, "Tasting provider %s.", pp->name);
2253
2254         geom = NULL;
2255         status = G_RAID_MD_TASTE_FAIL;
2256         gp = g_new_geomf(mp, "raid:taste");
2257         /*
2258          * This orphan function should be never called.
2259          */
2260         gp->orphan = g_raid_taste_orphan;
2261         cp = g_new_consumer(gp);
2262         cp->flags |= G_CF_DIRECT_RECEIVE;
2263         g_attach(cp, pp);
2264         if (g_access(cp, 1, 0, 0) != 0)
2265                 goto ofail;
2266
2267         LIST_FOREACH(class, &g_raid_md_classes, mdc_list) {
2268                 if (!class->mdc_enable)
2269                         continue;
2270                 G_RAID_DEBUG(2, "Tasting provider %s for %s metadata.",
2271                     pp->name, class->name);
2272                 obj = (void *)kobj_create((kobj_class_t)class, M_RAID,
2273                     M_WAITOK);
2274                 obj->mdo_class = class;
2275                 status = G_RAID_MD_TASTE(obj, mp, cp, &geom);
2276                 if (status != G_RAID_MD_TASTE_NEW)
2277                         kobj_delete((kobj_t)obj, M_RAID);
2278                 if (status != G_RAID_MD_TASTE_FAIL)
2279                         break;
2280         }
2281
2282         if (status == G_RAID_MD_TASTE_FAIL)
2283                 (void)g_access(cp, -1, 0, 0);
2284 ofail:
2285         g_detach(cp);
2286         g_destroy_consumer(cp);
2287         g_destroy_geom(gp);
2288         G_RAID_DEBUG(2, "Tasting provider %s done.", pp->name);
2289         return (geom);
2290 }
2291
2292 int
2293 g_raid_create_node_format(const char *format, struct gctl_req *req,
2294     struct g_geom **gp)
2295 {
2296         struct g_raid_md_class *class;
2297         struct g_raid_md_object *obj;
2298         int status;
2299
2300         G_RAID_DEBUG(2, "Creating array for %s metadata.", format);
2301         LIST_FOREACH(class, &g_raid_md_classes, mdc_list) {
2302                 if (strcasecmp(class->name, format) == 0)
2303                         break;
2304         }
2305         if (class == NULL) {
2306                 G_RAID_DEBUG(1, "No support for %s metadata.", format);
2307                 return (G_RAID_MD_TASTE_FAIL);
2308         }
2309         obj = (void *)kobj_create((kobj_class_t)class, M_RAID,
2310             M_WAITOK);
2311         obj->mdo_class = class;
2312         status = G_RAID_MD_CREATE_REQ(obj, &g_raid_class, req, gp);
2313         if (status != G_RAID_MD_TASTE_NEW)
2314                 kobj_delete((kobj_t)obj, M_RAID);
2315         return (status);
2316 }
2317
2318 static int
2319 g_raid_destroy_geom(struct gctl_req *req __unused,
2320     struct g_class *mp __unused, struct g_geom *gp)
2321 {
2322         struct g_raid_softc *sc;
2323         int error;
2324
2325         g_topology_unlock();
2326         sc = gp->softc;
2327         sx_xlock(&sc->sc_lock);
2328         g_cancel_event(sc);
2329         error = g_raid_destroy(gp->softc, G_RAID_DESTROY_SOFT);
2330         g_topology_lock();
2331         return (error);
2332 }
2333
2334 void g_raid_write_metadata(struct g_raid_softc *sc, struct g_raid_volume *vol,
2335     struct g_raid_subdisk *sd, struct g_raid_disk *disk)
2336 {
2337
2338         if (sc->sc_stopping == G_RAID_DESTROY_HARD)
2339                 return;
2340         if (sc->sc_md)
2341                 G_RAID_MD_WRITE(sc->sc_md, vol, sd, disk);
2342 }
2343
2344 void g_raid_fail_disk(struct g_raid_softc *sc,
2345     struct g_raid_subdisk *sd, struct g_raid_disk *disk)
2346 {
2347
2348         if (disk == NULL)
2349                 disk = sd->sd_disk;
2350         if (disk == NULL) {
2351                 G_RAID_DEBUG1(0, sc, "Warning! Fail request to an absent disk!");
2352                 return;
2353         }
2354         if (disk->d_state != G_RAID_DISK_S_ACTIVE) {
2355                 G_RAID_DEBUG1(0, sc, "Warning! Fail request to a disk in a "
2356                     "wrong state (%s)!", g_raid_disk_state2str(disk->d_state));
2357                 return;
2358         }
2359         if (sc->sc_md)
2360                 G_RAID_MD_FAIL_DISK(sc->sc_md, sd, disk);
2361 }
2362
2363 static void
2364 g_raid_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp,
2365     struct g_consumer *cp, struct g_provider *pp)
2366 {
2367         struct g_raid_softc *sc;
2368         struct g_raid_volume *vol;
2369         struct g_raid_subdisk *sd;
2370         struct g_raid_disk *disk;
2371         int i, s;
2372
2373         g_topology_assert();
2374
2375         sc = gp->softc;
2376         if (sc == NULL)
2377                 return;
2378         if (pp != NULL) {
2379                 vol = pp->private;
2380                 g_topology_unlock();
2381                 sx_xlock(&sc->sc_lock);
2382                 sbuf_printf(sb, "%s<descr>%s %s volume</descr>\n", indent,
2383                     sc->sc_md->mdo_class->name,
2384                     g_raid_volume_level2str(vol->v_raid_level,
2385                     vol->v_raid_level_qualifier));
2386                 sbuf_printf(sb, "%s<Label>%s</Label>\n", indent,
2387                     vol->v_name);
2388                 sbuf_printf(sb, "%s<RAIDLevel>%s</RAIDLevel>\n", indent,
2389                     g_raid_volume_level2str(vol->v_raid_level,
2390                     vol->v_raid_level_qualifier));
2391                 sbuf_printf(sb,
2392                     "%s<Transformation>%s</Transformation>\n", indent,
2393                     vol->v_tr ? vol->v_tr->tro_class->name : "NONE");
2394                 sbuf_printf(sb, "%s<Components>%u</Components>\n", indent,
2395                     vol->v_disks_count);
2396                 sbuf_printf(sb, "%s<Strip>%u</Strip>\n", indent,
2397                     vol->v_strip_size);
2398                 sbuf_printf(sb, "%s<State>%s</State>\n", indent,
2399                     g_raid_volume_state2str(vol->v_state));
2400                 sbuf_printf(sb, "%s<Dirty>%s</Dirty>\n", indent,
2401                     vol->v_dirty ? "Yes" : "No");
2402                 sbuf_printf(sb, "%s<Subdisks>", indent);
2403                 for (i = 0; i < vol->v_disks_count; i++) {
2404                         sd = &vol->v_subdisks[i];
2405                         if (sd->sd_disk != NULL &&
2406                             sd->sd_disk->d_consumer != NULL) {
2407                                 sbuf_printf(sb, "%s ",
2408                                     g_raid_get_diskname(sd->sd_disk));
2409                         } else {
2410                                 sbuf_printf(sb, "NONE ");
2411                         }
2412                         sbuf_printf(sb, "(%s",
2413                             g_raid_subdisk_state2str(sd->sd_state));
2414                         if (sd->sd_state == G_RAID_SUBDISK_S_REBUILD ||
2415                             sd->sd_state == G_RAID_SUBDISK_S_RESYNC) {
2416                                 sbuf_printf(sb, " %d%%",
2417                                     (int)(sd->sd_rebuild_pos * 100 /
2418                                      sd->sd_size));
2419                         }
2420                         sbuf_printf(sb, ")");
2421                         if (i + 1 < vol->v_disks_count)
2422                                 sbuf_printf(sb, ", ");
2423                 }
2424                 sbuf_printf(sb, "</Subdisks>\n");
2425                 sx_xunlock(&sc->sc_lock);
2426                 g_topology_lock();
2427         } else if (cp != NULL) {
2428                 disk = cp->private;
2429                 if (disk == NULL)
2430                         return;
2431                 g_topology_unlock();
2432                 sx_xlock(&sc->sc_lock);
2433                 sbuf_printf(sb, "%s<State>%s", indent,
2434                     g_raid_disk_state2str(disk->d_state));
2435                 if (!TAILQ_EMPTY(&disk->d_subdisks)) {
2436                         sbuf_printf(sb, " (");
2437                         TAILQ_FOREACH(sd, &disk->d_subdisks, sd_next) {
2438                                 sbuf_printf(sb, "%s",
2439                                     g_raid_subdisk_state2str(sd->sd_state));
2440                                 if (sd->sd_state == G_RAID_SUBDISK_S_REBUILD ||
2441                                     sd->sd_state == G_RAID_SUBDISK_S_RESYNC) {
2442                                         sbuf_printf(sb, " %d%%",
2443                                             (int)(sd->sd_rebuild_pos * 100 /
2444                                              sd->sd_size));
2445                                 }
2446                                 if (TAILQ_NEXT(sd, sd_next))
2447                                         sbuf_printf(sb, ", ");
2448                         }
2449                         sbuf_printf(sb, ")");
2450                 }
2451                 sbuf_printf(sb, "</State>\n");
2452                 sbuf_printf(sb, "%s<Subdisks>", indent);
2453                 TAILQ_FOREACH(sd, &disk->d_subdisks, sd_next) {
2454                         sbuf_printf(sb, "r%d(%s):%d@%ju",
2455                             sd->sd_volume->v_global_id,
2456                             sd->sd_volume->v_name,
2457                             sd->sd_pos, sd->sd_offset);
2458                         if (TAILQ_NEXT(sd, sd_next))
2459                                 sbuf_printf(sb, ", ");
2460                 }
2461                 sbuf_printf(sb, "</Subdisks>\n");
2462                 sbuf_printf(sb, "%s<ReadErrors>%d</ReadErrors>\n", indent,
2463                     disk->d_read_errs);
2464                 sx_xunlock(&sc->sc_lock);
2465                 g_topology_lock();
2466         } else {
2467                 g_topology_unlock();
2468                 sx_xlock(&sc->sc_lock);
2469                 if (sc->sc_md) {
2470                         sbuf_printf(sb, "%s<Metadata>%s</Metadata>\n", indent,
2471                             sc->sc_md->mdo_class->name);
2472                 }
2473                 if (!TAILQ_EMPTY(&sc->sc_volumes)) {
2474                         s = 0xff;
2475                         TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) {
2476                                 if (vol->v_state < s)
2477                                         s = vol->v_state;
2478                         }
2479                         sbuf_printf(sb, "%s<State>%s</State>\n", indent,
2480                             g_raid_volume_state2str(s));
2481                 }
2482                 sx_xunlock(&sc->sc_lock);
2483                 g_topology_lock();
2484         }
2485 }
2486
2487 static void
2488 g_raid_shutdown_post_sync(void *arg, int howto)
2489 {
2490         struct g_class *mp;
2491         struct g_geom *gp, *gp2;
2492         struct g_raid_softc *sc;
2493         struct g_raid_volume *vol;
2494
2495         mp = arg;
2496         DROP_GIANT();
2497         g_topology_lock();
2498         g_raid_shutdown = 1;
2499         LIST_FOREACH_SAFE(gp, &mp->geom, geom, gp2) {
2500                 if ((sc = gp->softc) == NULL)
2501                         continue;
2502                 g_topology_unlock();
2503                 sx_xlock(&sc->sc_lock);
2504                 TAILQ_FOREACH(vol, &sc->sc_volumes, v_next)
2505                         g_raid_clean(vol, -1);
2506                 g_cancel_event(sc);
2507                 g_raid_destroy(sc, G_RAID_DESTROY_DELAYED);
2508                 g_topology_lock();
2509         }
2510         g_topology_unlock();
2511         PICKUP_GIANT();
2512 }
2513
2514 static void
2515 g_raid_init(struct g_class *mp)
2516 {
2517
2518         g_raid_post_sync = EVENTHANDLER_REGISTER(shutdown_post_sync,
2519             g_raid_shutdown_post_sync, mp, SHUTDOWN_PRI_FIRST);
2520         if (g_raid_post_sync == NULL)
2521                 G_RAID_DEBUG(0, "Warning! Cannot register shutdown event.");
2522         g_raid_started = 1;
2523 }
2524
2525 static void
2526 g_raid_fini(struct g_class *mp)
2527 {
2528
2529         if (g_raid_post_sync != NULL)
2530                 EVENTHANDLER_DEREGISTER(shutdown_post_sync, g_raid_post_sync);
2531         g_raid_started = 0;
2532 }
2533
2534 int
2535 g_raid_md_modevent(module_t mod, int type, void *arg)
2536 {
2537         struct g_raid_md_class *class, *c, *nc;
2538         int error;
2539
2540         error = 0;
2541         class = arg;
2542         switch (type) {
2543         case MOD_LOAD:
2544                 c = LIST_FIRST(&g_raid_md_classes);
2545                 if (c == NULL || c->mdc_priority > class->mdc_priority)
2546                         LIST_INSERT_HEAD(&g_raid_md_classes, class, mdc_list);
2547                 else {
2548                         while ((nc = LIST_NEXT(c, mdc_list)) != NULL &&
2549                             nc->mdc_priority < class->mdc_priority)
2550                                 c = nc;
2551                         LIST_INSERT_AFTER(c, class, mdc_list);
2552                 }
2553                 if (g_raid_started)
2554                         g_retaste(&g_raid_class);
2555                 break;
2556         case MOD_UNLOAD:
2557                 LIST_REMOVE(class, mdc_list);
2558                 break;
2559         default:
2560                 error = EOPNOTSUPP;
2561                 break;
2562         }
2563
2564         return (error);
2565 }
2566
2567 int
2568 g_raid_tr_modevent(module_t mod, int type, void *arg)
2569 {
2570         struct g_raid_tr_class *class, *c, *nc;
2571         int error;
2572
2573         error = 0;
2574         class = arg;
2575         switch (type) {
2576         case MOD_LOAD:
2577                 c = LIST_FIRST(&g_raid_tr_classes);
2578                 if (c == NULL || c->trc_priority > class->trc_priority)
2579                         LIST_INSERT_HEAD(&g_raid_tr_classes, class, trc_list);
2580                 else {
2581                         while ((nc = LIST_NEXT(c, trc_list)) != NULL &&
2582                             nc->trc_priority < class->trc_priority)
2583                                 c = nc;
2584                         LIST_INSERT_AFTER(c, class, trc_list);
2585                 }
2586                 break;
2587         case MOD_UNLOAD:
2588                 LIST_REMOVE(class, trc_list);
2589                 break;
2590         default:
2591                 error = EOPNOTSUPP;
2592                 break;
2593         }
2594
2595         return (error);
2596 }
2597
2598 /*
2599  * Use local implementation of DECLARE_GEOM_CLASS(g_raid_class, g_raid)
2600  * to reduce module priority, allowing submodules to register them first.
2601  */
2602 static moduledata_t g_raid_mod = {
2603         "g_raid",
2604         g_modevent,
2605         &g_raid_class
2606 };
2607 DECLARE_MODULE(g_raid, g_raid_mod, SI_SUB_DRIVERS, SI_ORDER_THIRD);
2608 MODULE_VERSION(geom_raid, 0);