sys/geom/raid/g_raid.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2010 Alexander Motin <mav@FreeBSD.org>
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #include <sys/cdefs.h>
  30 __FBSDID("$FreeBSD$");
  31
  32 #include <sys/param.h>
  33 #include <sys/systm.h>
  34 #include <sys/kernel.h>
  35 #include <sys/module.h>
  36 #include <sys/limits.h>
  37 #include <sys/lock.h>
  38 #include <sys/mutex.h>
  39 #include <sys/bio.h>
  40 #include <sys/sbuf.h>
  41 #include <sys/sysctl.h>
  42 #include <sys/malloc.h>
  43 #include <sys/eventhandler.h>
  44 #include <vm/uma.h>
  45 #include <geom/geom.h>
  46 #include <geom/geom_dbg.h>
  47 #include <sys/proc.h>
  48 #include <sys/kthread.h>
  49 #include <sys/sched.h>
  50 #include <geom/raid/g_raid.h>
  51 #include "g_raid_md_if.h"
  52 #include "g_raid_tr_if.h"
  53
  54 static MALLOC_DEFINE(M_RAID, "raid_data", "GEOM_RAID Data");
  55
  56 SYSCTL_DECL(_kern_geom);
  57 SYSCTL_NODE(_kern_geom, OID_AUTO, raid, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
  58     "GEOM_RAID stuff");
  59 int g_raid_enable = 1;
  60 SYSCTL_INT(_kern_geom_raid, OID_AUTO, enable, CTLFLAG_RWTUN,
  61     &g_raid_enable, 0, "Enable on-disk metadata taste");
  62 u_int g_raid_aggressive_spare = 0;
  63 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, aggressive_spare, CTLFLAG_RWTUN,
  64     &g_raid_aggressive_spare, 0, "Use disks without metadata as spare");
  65 u_int g_raid_debug = 0;
  66 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, debug, CTLFLAG_RWTUN, &g_raid_debug, 0,
  67     "Debug level");
  68 int g_raid_read_err_thresh = 10;
  69 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, read_err_thresh, CTLFLAG_RWTUN,
  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 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, start_timeout, CTLFLAG_RWTUN,
  74     &g_raid_start_timeout, 0,
  75     "Time to wait for all array components");
  76 static u_int g_raid_clean_time = 5;
  77 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, clean_time, CTLFLAG_RWTUN,
  78     &g_raid_clean_time, 0, "Mark volume as clean when idling");
  79 static u_int g_raid_disconnect_on_failure = 1;
  80 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, disconnect_on_failure, CTLFLAG_RWTUN,
  81     &g_raid_disconnect_on_failure, 0, "Disconnect component on I/O failure.");
  82 static u_int g_raid_name_format = 0;
  83 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, name_format, CTLFLAG_RWTUN,
  84     &g_raid_name_format, 0, "Providers name format.");
  85 static u_int g_raid_idle_threshold = 1000000;
  86 SYSCTL_UINT(_kern_geom_raid, OID_AUTO, idle_threshold, CTLFLAG_RWTUN,
  87     &g_raid_idle_threshold, 1000000,
  88     "Time in microseconds to consider a volume idle.");
  89
  90 #define MSLEEP(rv, ident, mtx, priority, wmesg, timeout)        do {    \
  91         G_RAID_DEBUG(4, "%s: Sleeping %p.", __func__, (ident));         \
  92         rv = msleep((ident), (mtx), (priority), (wmesg), (timeout));    \
  93         G_RAID_DEBUG(4, "%s: Woken up %p.", __func__, (ident));         \
  94 } while (0)
  95
  96 LIST_HEAD(, g_raid_md_class) g_raid_md_classes =
  97     LIST_HEAD_INITIALIZER(g_raid_md_classes);
  98
  99 LIST_HEAD(, g_raid_tr_class) g_raid_tr_classes =
 100     LIST_HEAD_INITIALIZER(g_raid_tr_classes);
 101
 102 LIST_HEAD(, g_raid_volume) g_raid_volumes =
 103     LIST_HEAD_INITIALIZER(g_raid_volumes);
 104
 105 static eventhandler_tag g_raid_post_sync = NULL;
 106 static int g_raid_started = 0;
 107 static int g_raid_shutdown = 0;
 108
 109 static int g_raid_destroy_geom(struct gctl_req *req, struct g_class *mp,
 110     struct g_geom *gp);
 111 static g_taste_t g_raid_taste;
 112 static void g_raid_init(struct g_class *mp);
 113 static void g_raid_fini(struct g_class *mp);
 114
 115 struct g_class g_raid_class = {
 116         .name = G_RAID_CLASS_NAME,
 117         .version = G_VERSION,
 118         .ctlreq = g_raid_ctl,
 119         .taste = g_raid_taste,
 120         .destroy_geom = g_raid_destroy_geom,
 121         .init = g_raid_init,
 122         .fini = g_raid_fini
 123 };
 124
 125 static void g_raid_destroy_provider(struct g_raid_volume *vol);
 126 static int g_raid_update_disk(struct g_raid_disk *disk, u_int event);
 127 static int g_raid_update_subdisk(struct g_raid_subdisk *subdisk, u_int event);
 128 static int g_raid_update_volume(struct g_raid_volume *vol, u_int event);
 129 static int g_raid_update_node(struct g_raid_softc *sc, u_int event);
 130 static void g_raid_dumpconf(struct sbuf *sb, const char *indent,
 131     struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp);
 132 static void g_raid_start(struct bio *bp);
 133 static void g_raid_start_request(struct bio *bp);
 134 static void g_raid_disk_done(struct bio *bp);
 135 static void g_raid_poll(struct g_raid_softc *sc);
 136
 137 static const char *
 138 g_raid_node_event2str(int event)
 139 {
 140
 141         switch (event) {
 142         case G_RAID_NODE_E_WAKE:
 143                 return ("WAKE");
 144         case G_RAID_NODE_E_START:
 145                 return ("START");
 146         default:
 147                 return ("INVALID");
 148         }
 149 }
 150
 151 const char *
 152 g_raid_disk_state2str(int state)
 153 {
 154
 155         switch (state) {
 156         case G_RAID_DISK_S_NONE:
 157                 return ("NONE");
 158         case G_RAID_DISK_S_OFFLINE:
 159                 return ("OFFLINE");
 160         case G_RAID_DISK_S_DISABLED:
 161                 return ("DISABLED");
 162         case G_RAID_DISK_S_FAILED:
 163                 return ("FAILED");
 164         case G_RAID_DISK_S_STALE_FAILED:
 165                 return ("STALE_FAILED");
 166         case G_RAID_DISK_S_SPARE:
 167                 return ("SPARE");
 168         case G_RAID_DISK_S_STALE:
 169                 return ("STALE");
 170         case G_RAID_DISK_S_ACTIVE:
 171                 return ("ACTIVE");
 172         default:
 173                 return ("INVALID");
 174         }
 175 }
 176
 177 static const char *
 178 g_raid_disk_event2str(int event)
 179 {
 180
 181         switch (event) {
 182         case G_RAID_DISK_E_DISCONNECTED:
 183                 return ("DISCONNECTED");
 184         default:
 185                 return ("INVALID");
 186         }
 187 }
 188
 189 const char *
 190 g_raid_subdisk_state2str(int state)
 191 {
 192
 193         switch (state) {
 194         case G_RAID_SUBDISK_S_NONE:
 195                 return ("NONE");
 196         case G_RAID_SUBDISK_S_FAILED:
 197                 return ("FAILED");
 198         case G_RAID_SUBDISK_S_NEW:
 199                 return ("NEW");
 200         case G_RAID_SUBDISK_S_REBUILD:
 201                 return ("REBUILD");
 202         case G_RAID_SUBDISK_S_UNINITIALIZED:
 203                 return ("UNINITIALIZED");
 204         case G_RAID_SUBDISK_S_STALE:
 205                 return ("STALE");
 206         case G_RAID_SUBDISK_S_RESYNC:
 207                 return ("RESYNC");
 208         case G_RAID_SUBDISK_S_ACTIVE:
 209                 return ("ACTIVE");
 210         default:
 211                 return ("INVALID");
 212         }
 213 }
 214
 215 static const char *
 216 g_raid_subdisk_event2str(int event)
 217 {
 218
 219         switch (event) {
 220         case G_RAID_SUBDISK_E_NEW:
 221                 return ("NEW");
 222         case G_RAID_SUBDISK_E_FAILED:
 223                 return ("FAILED");
 224         case G_RAID_SUBDISK_E_DISCONNECTED:
 225                 return ("DISCONNECTED");
 226         default:
 227                 return ("INVALID");
 228         }
 229 }
 230
 231 const char *
 232 g_raid_volume_state2str(int state)
 233 {
 234
 235         switch (state) {
 236         case G_RAID_VOLUME_S_STARTING:
 237                 return ("STARTING");
 238         case G_RAID_VOLUME_S_BROKEN:
 239                 return ("BROKEN");
 240         case G_RAID_VOLUME_S_DEGRADED:
 241                 return ("DEGRADED");
 242         case G_RAID_VOLUME_S_SUBOPTIMAL:
 243                 return ("SUBOPTIMAL");
 244         case G_RAID_VOLUME_S_OPTIMAL:
 245                 return ("OPTIMAL");
 246         case G_RAID_VOLUME_S_UNSUPPORTED:
 247                 return ("UNSUPPORTED");
 248         case G_RAID_VOLUME_S_STOPPED:
 249                 return ("STOPPED");
 250         default:
 251                 return ("INVALID");
 252         }
 253 }
 254
 255 static const char *
 256 g_raid_volume_event2str(int event)
 257 {
 258
 259         switch (event) {
 260         case G_RAID_VOLUME_E_UP:
 261                 return ("UP");
 262         case G_RAID_VOLUME_E_DOWN:
 263                 return ("DOWN");
 264         case G_RAID_VOLUME_E_START:
 265                 return ("START");
 266         case G_RAID_VOLUME_E_STARTMD:
 267                 return ("STARTMD");
 268         default:
 269                 return ("INVALID");
 270         }
 271 }
 272
 273 const char *
 274 g_raid_volume_level2str(int level, int qual)
 275 {
 276
 277         switch (level) {
 278         case G_RAID_VOLUME_RL_RAID0:
 279                 return ("RAID0");
 280         case G_RAID_VOLUME_RL_RAID1:
 281                 return ("RAID1");
 282         case G_RAID_VOLUME_RL_RAID3:
 283                 if (qual == G_RAID_VOLUME_RLQ_R3P0)
 284                         return ("RAID3-P0");
 285                 if (qual == G_RAID_VOLUME_RLQ_R3PN)
 286                         return ("RAID3-PN");
 287                 return ("RAID3");
 288         case G_RAID_VOLUME_RL_RAID4:
 289                 if (qual == G_RAID_VOLUME_RLQ_R4P0)
 290                         return ("RAID4-P0");
 291                 if (qual == G_RAID_VOLUME_RLQ_R4PN)
 292                         return ("RAID4-PN");
 293                 return ("RAID4");
 294         case G_RAID_VOLUME_RL_RAID5:
 295                 if (qual == G_RAID_VOLUME_RLQ_R5RA)
 296                         return ("RAID5-RA");
 297                 if (qual == G_RAID_VOLUME_RLQ_R5RS)
 298                         return ("RAID5-RS");
 299                 if (qual == G_RAID_VOLUME_RLQ_R5LA)
 300                         return ("RAID5-LA");
 301                 if (qual == G_RAID_VOLUME_RLQ_R5LS)
 302                         return ("RAID5-LS");
 303                 return ("RAID5");
 304         case G_RAID_VOLUME_RL_RAID6:
 305                 if (qual == G_RAID_VOLUME_RLQ_R6RA)
 306                         return ("RAID6-RA");
 307                 if (qual == G_RAID_VOLUME_RLQ_R6RS)
 308                         return ("RAID6-RS");
 309                 if (qual == G_RAID_VOLUME_RLQ_R6LA)
 310                         return ("RAID6-LA");
 311                 if (qual == G_RAID_VOLUME_RLQ_R6LS)
 312                         return ("RAID6-LS");
 313                 return ("RAID6");
 314         case G_RAID_VOLUME_RL_RAIDMDF:
 315                 if (qual == G_RAID_VOLUME_RLQ_RMDFRA)
 316                         return ("RAIDMDF-RA");
 317                 if (qual == G_RAID_VOLUME_RLQ_RMDFRS)
 318                         return ("RAIDMDF-RS");
 319                 if (qual == G_RAID_VOLUME_RLQ_RMDFLA)
 320                         return ("RAIDMDF-LA");
 321                 if (qual == G_RAID_VOLUME_RLQ_RMDFLS)
 322                         return ("RAIDMDF-LS");
 323                 return ("RAIDMDF");
 324         case G_RAID_VOLUME_RL_RAID1E:
 325                 if (qual == G_RAID_VOLUME_RLQ_R1EA)
 326                         return ("RAID1E-A");
 327                 if (qual == G_RAID_VOLUME_RLQ_R1EO)
 328                         return ("RAID1E-O");
 329                 return ("RAID1E");
 330         case G_RAID_VOLUME_RL_SINGLE:
 331                 return ("SINGLE");
 332         case G_RAID_VOLUME_RL_CONCAT:
 333                 return ("CONCAT");
 334         case G_RAID_VOLUME_RL_RAID5E:
 335                 if (qual == G_RAID_VOLUME_RLQ_R5ERA)
 336                         return ("RAID5E-RA");
 337                 if (qual == G_RAID_VOLUME_RLQ_R5ERS)
 338                         return ("RAID5E-RS");
 339                 if (qual == G_RAID_VOLUME_RLQ_R5ELA)
 340                         return ("RAID5E-LA");
 341                 if (qual == G_RAID_VOLUME_RLQ_R5ELS)
 342                         return ("RAID5E-LS");
 343                 return ("RAID5E");
 344         case G_RAID_VOLUME_RL_RAID5EE:
 345                 if (qual == G_RAID_VOLUME_RLQ_R5EERA)
 346                         return ("RAID5EE-RA");
 347                 if (qual == G_RAID_VOLUME_RLQ_R5EERS)
 348                         return ("RAID5EE-RS");
 349                 if (qual == G_RAID_VOLUME_RLQ_R5EELA)
 350                         return ("RAID5EE-LA");
 351                 if (qual == G_RAID_VOLUME_RLQ_R5EELS)
 352                         return ("RAID5EE-LS");
 353                 return ("RAID5EE");
 354         case G_RAID_VOLUME_RL_RAID5R:
 355                 if (qual == G_RAID_VOLUME_RLQ_R5RRA)
 356                         return ("RAID5R-RA");
 357                 if (qual == G_RAID_VOLUME_RLQ_R5RRS)
 358                         return ("RAID5R-RS");
 359                 if (qual == G_RAID_VOLUME_RLQ_R5RLA)
 360                         return ("RAID5R-LA");
 361                 if (qual == G_RAID_VOLUME_RLQ_R5RLS)
 362                         return ("RAID5R-LS");
 363                 return ("RAID5E");
 364         default:
 365                 return ("UNKNOWN");
 366         }
 367 }
 368
 369 int
 370 g_raid_volume_str2level(const char *str, int *level, int *qual)
 371 {
 372
 373         *level = G_RAID_VOLUME_RL_UNKNOWN;
 374         *qual = G_RAID_VOLUME_RLQ_NONE;
 375         if (strcasecmp(str, "RAID0") == 0)
 376                 *level = G_RAID_VOLUME_RL_RAID0;
 377         else if (strcasecmp(str, "RAID1") == 0)
 378                 *level = G_RAID_VOLUME_RL_RAID1;
 379         else if (strcasecmp(str, "RAID3-P0") == 0) {
 380                 *level = G_RAID_VOLUME_RL_RAID3;
 381                 *qual = G_RAID_VOLUME_RLQ_R3P0;
 382         } else if (strcasecmp(str, "RAID3-PN") == 0 ||
 383                    strcasecmp(str, "RAID3") == 0) {
 384                 *level = G_RAID_VOLUME_RL_RAID3;
 385                 *qual = G_RAID_VOLUME_RLQ_R3PN;
 386         } else if (strcasecmp(str, "RAID4-P0") == 0) {
 387                 *level = G_RAID_VOLUME_RL_RAID4;
 388                 *qual = G_RAID_VOLUME_RLQ_R4P0;
 389         } else if (strcasecmp(str, "RAID4-PN") == 0 ||
 390                    strcasecmp(str, "RAID4") == 0) {
 391                 *level = G_RAID_VOLUME_RL_RAID4;
 392                 *qual = G_RAID_VOLUME_RLQ_R4PN;
 393         } else if (strcasecmp(str, "RAID5-RA") == 0) {
 394                 *level = G_RAID_VOLUME_RL_RAID5;
 395                 *qual = G_RAID_VOLUME_RLQ_R5RA;
 396         } else if (strcasecmp(str, "RAID5-RS") == 0) {
 397                 *level = G_RAID_VOLUME_RL_RAID5;
 398                 *qual = G_RAID_VOLUME_RLQ_R5RS;
 399         } else if (strcasecmp(str, "RAID5") == 0 ||
 400                    strcasecmp(str, "RAID5-LA") == 0) {
 401                 *level = G_RAID_VOLUME_RL_RAID5;
 402                 *qual = G_RAID_VOLUME_RLQ_R5LA;
 403         } else if (strcasecmp(str, "RAID5-LS") == 0) {
 404                 *level = G_RAID_VOLUME_RL_RAID5;
 405                 *qual = G_RAID_VOLUME_RLQ_R5LS;
 406         } else if (strcasecmp(str, "RAID6-RA") == 0) {
 407                 *level = G_RAID_VOLUME_RL_RAID6;
 408                 *qual = G_RAID_VOLUME_RLQ_R6RA;
 409         } else if (strcasecmp(str, "RAID6-RS") == 0) {
 410                 *level = G_RAID_VOLUME_RL_RAID6;
 411                 *qual = G_RAID_VOLUME_RLQ_R6RS;
 412         } else if (strcasecmp(str, "RAID6") == 0 ||
 413                    strcasecmp(str, "RAID6-LA") == 0) {
 414                 *level = G_RAID_VOLUME_RL_RAID6;
 415                 *qual = G_RAID_VOLUME_RLQ_R6LA;
 416         } else if (strcasecmp(str, "RAID6-LS") == 0) {
 417                 *level = G_RAID_VOLUME_RL_RAID6;
 418                 *qual = G_RAID_VOLUME_RLQ_R6LS;
 419         } else if (strcasecmp(str, "RAIDMDF-RA") == 0) {
 420                 *level = G_RAID_VOLUME_RL_RAIDMDF;
 421                 *qual = G_RAID_VOLUME_RLQ_RMDFRA;
 422         } else if (strcasecmp(str, "RAIDMDF-RS") == 0) {
 423                 *level = G_RAID_VOLUME_RL_RAIDMDF;
 424                 *qual = G_RAID_VOLUME_RLQ_RMDFRS;
 425         } else if (strcasecmp(str, "RAIDMDF") == 0 ||
 426                    strcasecmp(str, "RAIDMDF-LA") == 0) {
 427                 *level = G_RAID_VOLUME_RL_RAIDMDF;
 428                 *qual = G_RAID_VOLUME_RLQ_RMDFLA;
 429         } else if (strcasecmp(str, "RAIDMDF-LS") == 0) {
 430                 *level = G_RAID_VOLUME_RL_RAIDMDF;
 431                 *qual = G_RAID_VOLUME_RLQ_RMDFLS;
 432         } else if (strcasecmp(str, "RAID10") == 0 ||
 433                    strcasecmp(str, "RAID1E") == 0 ||
 434                    strcasecmp(str, "RAID1E-A") == 0) {
 435                 *level = G_RAID_VOLUME_RL_RAID1E;
 436                 *qual = G_RAID_VOLUME_RLQ_R1EA;
 437         } else if (strcasecmp(str, "RAID1E-O") == 0) {
 438                 *level = G_RAID_VOLUME_RL_RAID1E;
 439                 *qual = G_RAID_VOLUME_RLQ_R1EO;
 440         } else if (strcasecmp(str, "SINGLE") == 0)
 441                 *level = G_RAID_VOLUME_RL_SINGLE;
 442         else if (strcasecmp(str, "CONCAT") == 0)
 443                 *level = G_RAID_VOLUME_RL_CONCAT;
 444         else if (strcasecmp(str, "RAID5E-RA") == 0) {
 445                 *level = G_RAID_VOLUME_RL_RAID5E;
 446                 *qual = G_RAID_VOLUME_RLQ_R5ERA;
 447         } else if (strcasecmp(str, "RAID5E-RS") == 0) {
 448                 *level = G_RAID_VOLUME_RL_RAID5E;
 449                 *qual = G_RAID_VOLUME_RLQ_R5ERS;
 450         } else if (strcasecmp(str, "RAID5E") == 0 ||
 451                    strcasecmp(str, "RAID5E-LA") == 0) {
 452                 *level = G_RAID_VOLUME_RL_RAID5E;
 453                 *qual = G_RAID_VOLUME_RLQ_R5ELA;
 454         } else if (strcasecmp(str, "RAID5E-LS") == 0) {
 455                 *level = G_RAID_VOLUME_RL_RAID5E;
 456                 *qual = G_RAID_VOLUME_RLQ_R5ELS;
 457         } else if (strcasecmp(str, "RAID5EE-RA") == 0) {
 458                 *level = G_RAID_VOLUME_RL_RAID5EE;
 459                 *qual = G_RAID_VOLUME_RLQ_R5EERA;
 460         } else if (strcasecmp(str, "RAID5EE-RS") == 0) {
 461                 *level = G_RAID_VOLUME_RL_RAID5EE;
 462                 *qual = G_RAID_VOLUME_RLQ_R5EERS;
 463         } else if (strcasecmp(str, "RAID5EE") == 0 ||
 464                    strcasecmp(str, "RAID5EE-LA") == 0) {
 465                 *level = G_RAID_VOLUME_RL_RAID5EE;
 466                 *qual = G_RAID_VOLUME_RLQ_R5EELA;
 467         } else if (strcasecmp(str, "RAID5EE-LS") == 0) {
 468                 *level = G_RAID_VOLUME_RL_RAID5EE;
 469                 *qual = G_RAID_VOLUME_RLQ_R5EELS;
 470         } else if (strcasecmp(str, "RAID5R-RA") == 0) {
 471                 *level = G_RAID_VOLUME_RL_RAID5R;
 472                 *qual = G_RAID_VOLUME_RLQ_R5RRA;
 473         } else if (strcasecmp(str, "RAID5R-RS") == 0) {
 474                 *level = G_RAID_VOLUME_RL_RAID5R;
 475                 *qual = G_RAID_VOLUME_RLQ_R5RRS;
 476         } else if (strcasecmp(str, "RAID5R") == 0 ||
 477                    strcasecmp(str, "RAID5R-LA") == 0) {
 478                 *level = G_RAID_VOLUME_RL_RAID5R;
 479                 *qual = G_RAID_VOLUME_RLQ_R5RLA;
 480         } else if (strcasecmp(str, "RAID5R-LS") == 0) {
 481                 *level = G_RAID_VOLUME_RL_RAID5R;
 482                 *qual = G_RAID_VOLUME_RLQ_R5RLS;
 483         } else
 484                 return (-1);
 485         return (0);
 486 }
 487
 488 const char *
 489 g_raid_get_diskname(struct g_raid_disk *disk)
 490 {
 491
 492         if (disk->d_consumer == NULL || disk->d_consumer->provider == NULL)
 493                 return ("[unknown]");
 494         return (disk->d_consumer->provider->name);
 495 }
 496
 497 void
 498 g_raid_get_disk_info(struct g_raid_disk *disk)
 499 {
 500         struct g_consumer *cp = disk->d_consumer;
 501         int error, len;
 502
 503         /* Read kernel dumping information. */
 504         disk->d_kd.offset = 0;
 505         disk->d_kd.length = OFF_MAX;
 506         len = sizeof(disk->d_kd);
 507         error = g_io_getattr("GEOM::kerneldump", cp, &len, &disk->d_kd);
 508         if (error)
 509                 disk->d_kd.di.dumper = NULL;
 510         if (disk->d_kd.di.dumper == NULL)
 511                 G_RAID_DEBUG1(2, disk->d_softc,
 512                     "Dumping not supported by %s: %d.",
 513                     cp->provider->name, error);
 514
 515         /* Read BIO_DELETE support. */
 516         error = g_getattr("GEOM::candelete", cp, &disk->d_candelete);
 517         if (error)
 518                 disk->d_candelete = 0;
 519         if (!disk->d_candelete)
 520                 G_RAID_DEBUG1(2, disk->d_softc,
 521                     "BIO_DELETE not supported by %s: %d.",
 522                     cp->provider->name, error);
 523 }
 524
 525 void
 526 g_raid_report_disk_state(struct g_raid_disk *disk)
 527 {
 528         struct g_raid_subdisk *sd;
 529         int len, state;
 530         uint32_t s;
 531
 532         if (disk->d_consumer == NULL)
 533                 return;
 534         if (disk->d_state == G_RAID_DISK_S_DISABLED) {
 535                 s = G_STATE_ACTIVE; /* XXX */
 536         } else if (disk->d_state == G_RAID_DISK_S_FAILED ||
 537             disk->d_state == G_RAID_DISK_S_STALE_FAILED) {
 538                 s = G_STATE_FAILED;
 539         } else {
 540                 state = G_RAID_SUBDISK_S_ACTIVE;
 541                 TAILQ_FOREACH(sd, &disk->d_subdisks, sd_next) {
 542                         if (sd->sd_state < state)
 543                                 state = sd->sd_state;
 544                 }
 545                 if (state == G_RAID_SUBDISK_S_FAILED)
 546                         s = G_STATE_FAILED;
 547                 else if (state == G_RAID_SUBDISK_S_NEW ||
 548                     state == G_RAID_SUBDISK_S_REBUILD)
 549                         s = G_STATE_REBUILD;
 550                 else if (state == G_RAID_SUBDISK_S_STALE ||
 551                     state == G_RAID_SUBDISK_S_RESYNC)
 552                         s = G_STATE_RESYNC;
 553                 else
 554                         s = G_STATE_ACTIVE;
 555         }
 556         len = sizeof(s);
 557         g_io_getattr("GEOM::setstate", disk->d_consumer, &len, &s);
 558         G_RAID_DEBUG1(2, disk->d_softc, "Disk %s state reported as %d.",
 559             g_raid_get_diskname(disk), s);
 560 }
 561
 562 void
 563 g_raid_change_disk_state(struct g_raid_disk *disk, int state)
 564 {
 565
 566         G_RAID_DEBUG1(0, disk->d_softc, "Disk %s state changed from %s to %s.",
 567             g_raid_get_diskname(disk),
 568             g_raid_disk_state2str(disk->d_state),
 569             g_raid_disk_state2str(state));
 570         disk->d_state = state;
 571         g_raid_report_disk_state(disk);
 572 }
 573
 574 void
 575 g_raid_change_subdisk_state(struct g_raid_subdisk *sd, int state)
 576 {
 577
 578         G_RAID_DEBUG1(0, sd->sd_softc,
 579             "Subdisk %s:%d-%s state changed from %s to %s.",
 580             sd->sd_volume->v_name, sd->sd_pos,
 581             sd->sd_disk ? g_raid_get_diskname(sd->sd_disk) : "[none]",
 582             g_raid_subdisk_state2str(sd->sd_state),
 583             g_raid_subdisk_state2str(state));
 584         sd->sd_state = state;
 585         if (sd->sd_disk)
 586                 g_raid_report_disk_state(sd->sd_disk);
 587 }
 588
 589 void
 590 g_raid_change_volume_state(struct g_raid_volume *vol, int state)
 591 {
 592
 593         G_RAID_DEBUG1(0, vol->v_softc,
 594             "Volume %s state changed from %s to %s.",
 595             vol->v_name,
 596             g_raid_volume_state2str(vol->v_state),
 597             g_raid_volume_state2str(state));
 598         vol->v_state = state;
 599 }
 600
 601 /*
 602  * --- Events handling functions ---
 603  * Events in geom_raid are used to maintain subdisks and volumes status
 604  * from one thread to simplify locking.
 605  */
 606 static void
 607 g_raid_event_free(struct g_raid_event *ep)
 608 {
 609
 610         free(ep, M_RAID);
 611 }
 612
 613 int
 614 g_raid_event_send(void *arg, int event, int flags)
 615 {
 616         struct g_raid_softc *sc;
 617         struct g_raid_event *ep;
 618         int error;
 619
 620         if ((flags & G_RAID_EVENT_VOLUME) != 0) {
 621                 sc = ((struct g_raid_volume *)arg)->v_softc;
 622         } else if ((flags & G_RAID_EVENT_DISK) != 0) {
 623                 sc = ((struct g_raid_disk *)arg)->d_softc;
 624         } else if ((flags & G_RAID_EVENT_SUBDISK) != 0) {
 625                 sc = ((struct g_raid_subdisk *)arg)->sd_softc;
 626         } else {
 627                 sc = arg;
 628         }
 629         ep = malloc(sizeof(*ep), M_RAID,
 630             sx_xlocked(&sc->sc_lock) ? M_WAITOK : M_NOWAIT);
 631         if (ep == NULL)
 632                 return (ENOMEM);
 633         ep->e_tgt = arg;
 634         ep->e_event = event;
 635         ep->e_flags = flags;
 636         ep->e_error = 0;
 637         G_RAID_DEBUG1(4, sc, "Sending event %p. Waking up %p.", ep, sc);
 638         mtx_lock(&sc->sc_queue_mtx);
 639         TAILQ_INSERT_TAIL(&sc->sc_events, ep, e_next);
 640         mtx_unlock(&sc->sc_queue_mtx);
 641         wakeup(sc);
 642
 643         if ((flags & G_RAID_EVENT_WAIT) == 0)
 644                 return (0);
 645
 646         sx_assert(&sc->sc_lock, SX_XLOCKED);
 647         G_RAID_DEBUG1(4, sc, "Sleeping on %p.", ep);
 648         sx_xunlock(&sc->sc_lock);
 649         while ((ep->e_flags & G_RAID_EVENT_DONE) == 0) {
 650                 mtx_lock(&sc->sc_queue_mtx);
 651                 MSLEEP(error, ep, &sc->sc_queue_mtx, PRIBIO | PDROP, "m:event",
 652                     hz * 5);
 653         }
 654         error = ep->e_error;
 655         g_raid_event_free(ep);
 656         sx_xlock(&sc->sc_lock);
 657         return (error);
 658 }
 659
 660 static void
 661 g_raid_event_cancel(struct g_raid_softc *sc, void *tgt)
 662 {
 663         struct g_raid_event *ep, *tmpep;
 664
 665         sx_assert(&sc->sc_lock, SX_XLOCKED);
 666
 667         mtx_lock(&sc->sc_queue_mtx);
 668         TAILQ_FOREACH_SAFE(ep, &sc->sc_events, e_next, tmpep) {
 669                 if (ep->e_tgt != tgt)
 670                         continue;
 671                 TAILQ_REMOVE(&sc->sc_events, ep, e_next);
 672                 if ((ep->e_flags & G_RAID_EVENT_WAIT) == 0)
 673                         g_raid_event_free(ep);
 674                 else {
 675                         ep->e_error = ECANCELED;
 676                         wakeup(ep);
 677                 }
 678         }
 679         mtx_unlock(&sc->sc_queue_mtx);
 680 }
 681
 682 static int
 683 g_raid_event_check(struct g_raid_softc *sc, void *tgt)
 684 {
 685         struct g_raid_event *ep;
 686         int     res = 0;
 687
 688         sx_assert(&sc->sc_lock, SX_XLOCKED);
 689
 690         mtx_lock(&sc->sc_queue_mtx);
 691         TAILQ_FOREACH(ep, &sc->sc_events, e_next) {
 692                 if (ep->e_tgt != tgt)
 693                         continue;
 694                 res = 1;
 695                 break;
 696         }
 697         mtx_unlock(&sc->sc_queue_mtx);
 698         return (res);
 699 }
 700
 701 /*
 702  * Return the number of disks in given state.
 703  * If state is equal to -1, count all connected disks.
 704  */
 705 u_int
 706 g_raid_ndisks(struct g_raid_softc *sc, int state)
 707 {
 708         struct g_raid_disk *disk;
 709         u_int n;
 710
 711         sx_assert(&sc->sc_lock, SX_LOCKED);
 712
 713         n = 0;
 714         TAILQ_FOREACH(disk, &sc->sc_disks, d_next) {
 715                 if (disk->d_state == state || state == -1)
 716                         n++;
 717         }
 718         return (n);
 719 }
 720
 721 /*
 722  * Return the number of subdisks in given state.
 723  * If state is equal to -1, count all connected disks.
 724  */
 725 u_int
 726 g_raid_nsubdisks(struct g_raid_volume *vol, int state)
 727 {
 728         struct g_raid_subdisk *subdisk;
 729         struct g_raid_softc *sc;
 730         u_int i, n ;
 731
 732         sc = vol->v_softc;
 733         sx_assert(&sc->sc_lock, SX_LOCKED);
 734
 735         n = 0;
 736         for (i = 0; i < vol->v_disks_count; i++) {
 737                 subdisk = &vol->v_subdisks[i];
 738                 if ((state == -1 &&
 739                      subdisk->sd_state != G_RAID_SUBDISK_S_NONE) ||
 740                     subdisk->sd_state == state)
 741                         n++;
 742         }
 743         return (n);
 744 }
 745
 746 /*
 747  * Return the first subdisk in given state.
 748  * If state is equal to -1, then the first connected disks.
 749  */
 750 struct g_raid_subdisk *
 751 g_raid_get_subdisk(struct g_raid_volume *vol, int state)
 752 {
 753         struct g_raid_subdisk *sd;
 754         struct g_raid_softc *sc;
 755         u_int i;
 756
 757         sc = vol->v_softc;
 758         sx_assert(&sc->sc_lock, SX_LOCKED);
 759
 760         for (i = 0; i < vol->v_disks_count; i++) {
 761                 sd = &vol->v_subdisks[i];
 762                 if ((state == -1 &&
 763                      sd->sd_state != G_RAID_SUBDISK_S_NONE) ||
 764                     sd->sd_state == state)
 765                         return (sd);
 766         }
 767         return (NULL);
 768 }
 769
 770 struct g_consumer *
 771 g_raid_open_consumer(struct g_raid_softc *sc, const char *name)
 772 {
 773         struct g_consumer *cp;
 774         struct g_provider *pp;
 775
 776         g_topology_assert();
 777
 778         if (strncmp(name, _PATH_DEV, 5) == 0)
 779                 name += 5;
 780         pp = g_provider_by_name(name);
 781         if (pp == NULL)
 782                 return (NULL);
 783         cp = g_new_consumer(sc->sc_geom);
 784         cp->flags |= G_CF_DIRECT_RECEIVE;
 785         if (g_attach(cp, pp) != 0) {
 786                 g_destroy_consumer(cp);
 787                 return (NULL);
 788         }
 789         if (g_access(cp, 1, 1, 1) != 0) {
 790                 g_detach(cp);
 791                 g_destroy_consumer(cp);
 792                 return (NULL);
 793         }
 794         return (cp);
 795 }
 796
 797 static u_int
 798 g_raid_nrequests(struct g_raid_softc *sc, struct g_consumer *cp)
 799 {
 800         struct bio *bp;
 801         u_int nreqs = 0;
 802
 803         mtx_lock(&sc->sc_queue_mtx);
 804         TAILQ_FOREACH(bp, &sc->sc_queue.queue, bio_queue) {
 805                 if (bp->bio_from == cp)
 806                         nreqs++;
 807         }
 808         mtx_unlock(&sc->sc_queue_mtx);
 809         return (nreqs);
 810 }
 811
 812 u_int
 813 g_raid_nopens(struct g_raid_softc *sc)
 814 {
 815         struct g_raid_volume *vol;
 816         u_int opens;
 817
 818         opens = 0;
 819         TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) {
 820                 if (vol->v_provider_open != 0)
 821                         opens++;
 822         }
 823         return (opens);
 824 }
 825
 826 static int
 827 g_raid_consumer_is_busy(struct g_raid_softc *sc, struct g_consumer *cp)
 828 {
 829
 830         if (cp->index > 0) {
 831                 G_RAID_DEBUG1(2, sc,
 832                     "I/O requests for %s exist, can't destroy it now.",
 833                     cp->provider->name);
 834                 return (1);
 835         }
 836         if (g_raid_nrequests(sc, cp) > 0) {
 837                 G_RAID_DEBUG1(2, sc,
 838                     "I/O requests for %s in queue, can't destroy it now.",
 839                     cp->provider->name);
 840                 return (1);
 841         }
 842         return (0);
 843 }
 844
 845 static void
 846 g_raid_destroy_consumer(void *arg, int flags __unused)
 847 {
 848         struct g_consumer *cp;
 849
 850         g_topology_assert();
 851
 852         cp = arg;
 853         G_RAID_DEBUG(1, "Consumer %s destroyed.", cp->provider->name);
 854         g_detach(cp);
 855         g_destroy_consumer(cp);
 856 }
 857
 858 void
 859 g_raid_kill_consumer(struct g_raid_softc *sc, struct g_consumer *cp)
 860 {
 861         struct g_provider *pp;
 862         int retaste_wait;
 863
 864         g_topology_assert_not();
 865
 866         g_topology_lock();
 867         cp->private = NULL;
 868         if (g_raid_consumer_is_busy(sc, cp))
 869                 goto out;
 870         pp = cp->provider;
 871         retaste_wait = 0;
 872         if (cp->acw == 1) {
 873                 if ((pp->geom->flags & G_GEOM_WITHER) == 0)
 874                         retaste_wait = 1;
 875         }
 876         if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0)
 877                 g_access(cp, -cp->acr, -cp->acw, -cp->ace);
 878         if (retaste_wait) {
 879                 /*
 880                  * After retaste event was send (inside g_access()), we can send
 881                  * event to detach and destroy consumer.
 882                  * A class, which has consumer to the given provider connected
 883                  * will not receive retaste event for the provider.
 884                  * This is the way how I ignore retaste events when I close
 885                  * consumers opened for write: I detach and destroy consumer
 886                  * after retaste event is sent.
 887                  */
 888                 g_post_event(g_raid_destroy_consumer, cp, M_WAITOK, NULL);
 889                 goto out;
 890         }
 891         G_RAID_DEBUG(1, "Consumer %s destroyed.", pp->name);
 892         g_detach(cp);
 893         g_destroy_consumer(cp);
 894 out:
 895         g_topology_unlock();
 896 }
 897
 898 static void
 899 g_raid_orphan(struct g_consumer *cp)
 900 {
 901         struct g_raid_disk *disk;
 902
 903         g_topology_assert();
 904
 905         disk = cp->private;
 906         if (disk == NULL)
 907                 return;
 908         g_raid_event_send(disk, G_RAID_DISK_E_DISCONNECTED,
 909             G_RAID_EVENT_DISK);
 910 }
 911
 912 static void
 913 g_raid_clean(struct g_raid_volume *vol, int acw)
 914 {
 915         struct g_raid_softc *sc;
 916         int timeout;
 917
 918         sc = vol->v_softc;
 919         g_topology_assert_not();
 920         sx_assert(&sc->sc_lock, SX_XLOCKED);
 921
 922 //      if ((sc->sc_flags & G_RAID_DEVICE_FLAG_NOFAILSYNC) != 0)
 923 //              return;
 924         if (!vol->v_dirty)
 925                 return;
 926         if (vol->v_writes > 0)
 927                 return;
 928         if (acw > 0 || (acw == -1 &&
 929             vol->v_provider != NULL && vol->v_provider->acw > 0)) {
 930                 timeout = g_raid_clean_time - (time_uptime - vol->v_last_write);
 931                 if (!g_raid_shutdown && timeout > 0)
 932                         return;
 933         }
 934         vol->v_dirty = 0;
 935         G_RAID_DEBUG1(1, sc, "Volume %s marked as clean.",
 936             vol->v_name);
 937         g_raid_write_metadata(sc, vol, NULL, NULL);
 938 }
 939
 940 static void
 941 g_raid_dirty(struct g_raid_volume *vol)
 942 {
 943         struct g_raid_softc *sc;
 944
 945         sc = vol->v_softc;
 946         g_topology_assert_not();
 947         sx_assert(&sc->sc_lock, SX_XLOCKED);
 948
 949 //      if ((sc->sc_flags & G_RAID_DEVICE_FLAG_NOFAILSYNC) != 0)
 950 //              return;
 951         vol->v_dirty = 1;
 952         G_RAID_DEBUG1(1, sc, "Volume %s marked as dirty.",
 953             vol->v_name);
 954         g_raid_write_metadata(sc, vol, NULL, NULL);
 955 }
 956
 957 void
 958 g_raid_tr_flush_common(struct g_raid_tr_object *tr, struct bio *bp)
 959 {
 960         struct g_raid_volume *vol;
 961         struct g_raid_subdisk *sd;
 962         struct bio_queue_head queue;
 963         struct bio *cbp;
 964         int i;
 965
 966         vol = tr->tro_volume;
 967
 968         /*
 969          * Allocate all bios before sending any request, so we can return
 970          * ENOMEM in nice and clean way.
 971          */
 972         bioq_init(&queue);
 973         for (i = 0; i < vol->v_disks_count; i++) {
 974                 sd = &vol->v_subdisks[i];
 975                 if (sd->sd_state == G_RAID_SUBDISK_S_NONE ||
 976                     sd->sd_state == G_RAID_SUBDISK_S_FAILED)
 977                         continue;
 978                 cbp = g_clone_bio(bp);
 979                 if (cbp == NULL)
 980                         goto failure;
 981                 cbp->bio_caller1 = sd;
 982                 bioq_insert_tail(&queue, cbp);
 983         }
 984         while ((cbp = bioq_takefirst(&queue)) != NULL) {
 985                 sd = cbp->bio_caller1;
 986                 cbp->bio_caller1 = NULL;
 987                 g_raid_subdisk_iostart(sd, cbp);
 988         }
 989         return;
 990 failure:
 991         while ((cbp = bioq_takefirst(&queue)) != NULL)
 992                 g_destroy_bio(cbp);
 993         if (bp->bio_error == 0)
 994                 bp->bio_error = ENOMEM;
 995         g_raid_iodone(bp, bp->bio_error);
 996 }
 997
 998 static void
 999 g_raid_tr_kerneldump_common_done(struct bio *bp)
1000 {
1001
1002         bp->bio_flags |= BIO_DONE;
1003 }
1004
1005 int
1006 g_raid_tr_kerneldump_common(struct g_raid_tr_object *tr,
1007     void *virtual, vm_offset_t physical, off_t offset, size_t length)
1008 {
1009         struct g_raid_softc *sc;
1010         struct g_raid_volume *vol;
1011         struct bio bp;
1012
1013         vol = tr->tro_volume;
1014         sc = vol->v_softc;
1015
1016         g_reset_bio(&bp);
1017         bp.bio_cmd = BIO_WRITE;
1018         bp.bio_done = g_raid_tr_kerneldump_common_done;
1019         bp.bio_attribute = NULL;
1020         bp.bio_offset = offset;
1021         bp.bio_length = length;
1022         bp.bio_data = virtual;
1023         bp.bio_to = vol->v_provider;
1024
1025         g_raid_start(&bp);
1026         while (!(bp.bio_flags & BIO_DONE)) {
1027                 G_RAID_DEBUG1(4, sc, "Poll...");
1028                 g_raid_poll(sc);
1029                 DELAY(10);
1030         }
1031
1032         return (bp.bio_error != 0 ? EIO : 0);
1033 }
1034
1035 static int
1036 g_raid_dump(void *arg,
1037     void *virtual, vm_offset_t physical, off_t offset, size_t length)
1038 {
1039         struct g_raid_volume *vol;
1040         int error;
1041
1042         vol = (struct g_raid_volume *)arg;
1043         G_RAID_DEBUG1(3, vol->v_softc, "Dumping at off %llu len %llu.",
1044             (long long unsigned)offset, (long long unsigned)length);
1045
1046         error = G_RAID_TR_KERNELDUMP(vol->v_tr,
1047             virtual, physical, offset, length);
1048         return (error);
1049 }
1050
1051 static void
1052 g_raid_kerneldump(struct g_raid_softc *sc, struct bio *bp)
1053 {
1054         struct g_kerneldump *gkd;
1055         struct g_provider *pp;
1056         struct g_raid_volume *vol;
1057
1058         gkd = (struct g_kerneldump*)bp->bio_data;
1059         pp = bp->bio_to;
1060         vol = pp->private;
1061         g_trace(G_T_TOPOLOGY, "g_raid_kerneldump(%s, %jd, %jd)",
1062                 pp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length);
1063         gkd->di.dumper = g_raid_dump;
1064         gkd->di.priv = vol;
1065         gkd->di.blocksize = vol->v_sectorsize;
1066         gkd->di.maxiosize = DFLTPHYS;
1067         gkd->di.mediaoffset = gkd->offset;
1068         if ((gkd->offset + gkd->length) > vol->v_mediasize)
1069                 gkd->length = vol->v_mediasize - gkd->offset;
1070         gkd->di.mediasize = gkd->length;
1071         g_io_deliver(bp, 0);
1072 }
1073
1074 static void
1075 g_raid_candelete(struct g_raid_softc *sc, struct bio *bp)
1076 {
1077         struct g_provider *pp;
1078         struct g_raid_volume *vol;
1079         struct g_raid_subdisk *sd;
1080         int i, val;
1081
1082         pp = bp->bio_to;
1083         vol = pp->private;
1084         for (i = 0; i < vol->v_disks_count; i++) {
1085                 sd = &vol->v_subdisks[i];
1086                 if (sd->sd_state == G_RAID_SUBDISK_S_NONE)
1087                         continue;
1088                 if (sd->sd_disk->d_candelete)
1089                         break;
1090         }
1091         val = i < vol->v_disks_count;
1092         g_handleattr(bp, "GEOM::candelete", &val, sizeof(val));
1093 }
1094
1095 static void
1096 g_raid_start(struct bio *bp)
1097 {
1098         struct g_raid_softc *sc;
1099
1100         sc = bp->bio_to->geom->softc;
1101         /*
1102          * If sc == NULL or there are no valid disks, provider's error
1103          * should be set and g_raid_start() should not be called at all.
1104          */
1105 //      KASSERT(sc != NULL && sc->sc_state == G_RAID_VOLUME_S_RUNNING,
1106 //          ("Provider's error should be set (error=%d)(mirror=%s).",
1107 //          bp->bio_to->error, bp->bio_to->name));
1108         G_RAID_LOGREQ(3, bp, "Request received.");
1109
1110         switch (bp->bio_cmd) {
1111         case BIO_READ:
1112         case BIO_WRITE:
1113         case BIO_DELETE:
1114         case BIO_FLUSH:
1115         case BIO_SPEEDUP:
1116                 break;
1117         case BIO_GETATTR:
1118                 if (!strcmp(bp->bio_attribute, "GEOM::candelete"))
1119                         g_raid_candelete(sc, bp);
1120                 else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump"))
1121                         g_raid_kerneldump(sc, bp);
1122                 else
1123                         g_io_deliver(bp, EOPNOTSUPP);
1124                 return;
1125         default:
1126                 g_io_deliver(bp, EOPNOTSUPP);
1127                 return;
1128         }
1129         mtx_lock(&sc->sc_queue_mtx);
1130         bioq_insert_tail(&sc->sc_queue, bp);
1131         mtx_unlock(&sc->sc_queue_mtx);
1132         if (!dumping) {
1133                 G_RAID_DEBUG1(4, sc, "Waking up %p.", sc);
1134                 wakeup(sc);
1135         }
1136 }
1137
1138 static int
1139 g_raid_bio_overlaps(const struct bio *bp, off_t lstart, off_t len)
1140 {
1141         /*
1142          * 5 cases:
1143          * (1) bp entirely below NO
1144          * (2) bp entirely above NO
1145          * (3) bp start below, but end in range YES
1146          * (4) bp entirely within YES
1147          * (5) bp starts within, ends above YES
1148          *
1149          * lock range 10-19 (offset 10 length 10)
1150          * (1) 1-5: first if kicks it out
1151          * (2) 30-35: second if kicks it out
1152          * (3) 5-15: passes both ifs
1153          * (4) 12-14: passes both ifs
1154          * (5) 19-20: passes both
1155          */
1156         off_t lend = lstart + len - 1;
1157         off_t bstart = bp->bio_offset;
1158         off_t bend = bp->bio_offset + bp->bio_length - 1;
1159
1160         if (bend < lstart)
1161                 return (0);
1162         if (lend < bstart)
1163                 return (0);
1164         return (1);
1165 }
1166
1167 static int
1168 g_raid_is_in_locked_range(struct g_raid_volume *vol, const struct bio *bp)
1169 {
1170         struct g_raid_lock *lp;
1171
1172         sx_assert(&vol->v_softc->sc_lock, SX_LOCKED);
1173
1174         LIST_FOREACH(lp, &vol->v_locks, l_next) {
1175                 if (g_raid_bio_overlaps(bp, lp->l_offset, lp->l_length))
1176                         return (1);
1177         }
1178         return (0);
1179 }
1180
1181 static void
1182 g_raid_start_request(struct bio *bp)
1183 {
1184         struct g_raid_softc *sc;
1185         struct g_raid_volume *vol;
1186
1187         sc = bp->bio_to->geom->softc;
1188         sx_assert(&sc->sc_lock, SX_LOCKED);
1189         vol = bp->bio_to->private;
1190
1191         /*
1192          * Check to see if this item is in a locked range.  If so,
1193          * queue it to our locked queue and return.  We'll requeue
1194          * it when the range is unlocked.  Internal I/O for the
1195          * rebuild/rescan/recovery process is excluded from this
1196          * check so we can actually do the recovery.
1197          */
1198         if (!(bp->bio_cflags & G_RAID_BIO_FLAG_SPECIAL) &&
1199             g_raid_is_in_locked_range(vol, bp)) {
1200                 G_RAID_LOGREQ(3, bp, "Defer request.");
1201                 bioq_insert_tail(&vol->v_locked, bp);
1202                 return;
1203         }
1204
1205         /*
1206          * If we're actually going to do the write/delete, then
1207          * update the idle stats for the volume.
1208          */
1209         if (bp->bio_cmd == BIO_WRITE || bp->bio_cmd == BIO_DELETE) {
1210                 if (!vol->v_dirty)
1211                         g_raid_dirty(vol);
1212                 vol->v_writes++;
1213         }
1214
1215         /*
1216          * Put request onto inflight queue, so we can check if new
1217          * synchronization requests don't collide with it.  Then tell
1218          * the transformation layer to start the I/O.
1219          */
1220         bioq_insert_tail(&vol->v_inflight, bp);
1221         G_RAID_LOGREQ(4, bp, "Request started");
1222         G_RAID_TR_IOSTART(vol->v_tr, bp);
1223 }
1224
1225 static void
1226 g_raid_finish_with_locked_ranges(struct g_raid_volume *vol, struct bio *bp)
1227 {
1228         off_t off, len;
1229         struct bio *nbp;
1230         struct g_raid_lock *lp;
1231
1232         vol->v_pending_lock = 0;
1233         LIST_FOREACH(lp, &vol->v_locks, l_next) {
1234                 if (lp->l_pending) {
1235                         off = lp->l_offset;
1236                         len = lp->l_length;
1237                         lp->l_pending = 0;
1238                         TAILQ_FOREACH(nbp, &vol->v_inflight.queue, bio_queue) {
1239                                 if (g_raid_bio_overlaps(nbp, off, len))
1240                                         lp->l_pending++;
1241                         }
1242                         if (lp->l_pending) {
1243                                 vol->v_pending_lock = 1;
1244                                 G_RAID_DEBUG1(4, vol->v_softc,
1245                                     "Deferred lock(%jd, %jd) has %d pending",
1246                                     (intmax_t)off, (intmax_t)(off + len),
1247                                     lp->l_pending);
1248                                 continue;
1249                         }
1250                         G_RAID_DEBUG1(4, vol->v_softc,
1251                             "Deferred lock of %jd to %jd completed",
1252                             (intmax_t)off, (intmax_t)(off + len));
1253                         G_RAID_TR_LOCKED(vol->v_tr, lp->l_callback_arg);
1254                 }
1255         }
1256 }
1257
1258 void
1259 g_raid_iodone(struct bio *bp, int error)
1260 {
1261         struct g_raid_softc *sc;
1262         struct g_raid_volume *vol;
1263
1264         sc = bp->bio_to->geom->softc;
1265         sx_assert(&sc->sc_lock, SX_LOCKED);
1266         vol = bp->bio_to->private;
1267         G_RAID_LOGREQ(3, bp, "Request done: %d.", error);
1268
1269         /* Update stats if we done write/delete. */
1270         if (bp->bio_cmd == BIO_WRITE || bp->bio_cmd == BIO_DELETE) {
1271                 vol->v_writes--;
1272                 vol->v_last_write = time_uptime;
1273         }
1274
1275         bioq_remove(&vol->v_inflight, bp);
1276         if (vol->v_pending_lock && g_raid_is_in_locked_range(vol, bp))
1277                 g_raid_finish_with_locked_ranges(vol, bp);
1278         getmicrouptime(&vol->v_last_done);
1279         g_io_deliver(bp, error);
1280 }
1281
1282 int
1283 g_raid_lock_range(struct g_raid_volume *vol, off_t off, off_t len,
1284     struct bio *ignore, void *argp)
1285 {
1286         struct g_raid_softc *sc;
1287         struct g_raid_lock *lp;
1288         struct bio *bp;
1289
1290         sc = vol->v_softc;
1291         lp = malloc(sizeof(*lp), M_RAID, M_WAITOK | M_ZERO);
1292         LIST_INSERT_HEAD(&vol->v_locks, lp, l_next);
1293         lp->l_offset = off;
1294         lp->l_length = len;
1295         lp->l_callback_arg = argp;
1296
1297         lp->l_pending = 0;
1298         TAILQ_FOREACH(bp, &vol->v_inflight.queue, bio_queue) {
1299                 if (bp != ignore && g_raid_bio_overlaps(bp, off, len))
1300                         lp->l_pending++;
1301         }
1302
1303         /*
1304          * If there are any writes that are pending, we return EBUSY.  All
1305          * callers will have to wait until all pending writes clear.
1306          */
1307         if (lp->l_pending > 0) {
1308                 vol->v_pending_lock = 1;
1309                 G_RAID_DEBUG1(4, sc, "Locking range %jd to %jd deferred %d pend",
1310                     (intmax_t)off, (intmax_t)(off+len), lp->l_pending);
1311                 return (EBUSY);
1312         }
1313         G_RAID_DEBUG1(4, sc, "Locking range %jd to %jd",
1314             (intmax_t)off, (intmax_t)(off+len));
1315         G_RAID_TR_LOCKED(vol->v_tr, lp->l_callback_arg);
1316         return (0);
1317 }
1318
1319 int
1320 g_raid_unlock_range(struct g_raid_volume *vol, off_t off, off_t len)
1321 {
1322         struct g_raid_lock *lp;
1323         struct g_raid_softc *sc;
1324         struct bio *bp;
1325
1326         sc = vol->v_softc;
1327         LIST_FOREACH(lp, &vol->v_locks, l_next) {
1328                 if (lp->l_offset == off && lp->l_length == len) {
1329                         LIST_REMOVE(lp, l_next);
1330                         /* XXX
1331                          * Right now we just put them all back on the queue
1332                          * and hope for the best.  We hope this because any
1333                          * locked ranges will go right back on this list
1334                          * when the worker thread runs.
1335                          * XXX
1336                          */
1337                         G_RAID_DEBUG1(4, sc, "Unlocked %jd to %jd",
1338                             (intmax_t)lp->l_offset,
1339                             (intmax_t)(lp->l_offset+lp->l_length));
1340                         mtx_lock(&sc->sc_queue_mtx);
1341                         while ((bp = bioq_takefirst(&vol->v_locked)) != NULL)
1342                                 bioq_insert_tail(&sc->sc_queue, bp);
1343                         mtx_unlock(&sc->sc_queue_mtx);
1344                         free(lp, M_RAID);
1345                         return (0);
1346                 }
1347         }
1348         return (EINVAL);
1349 }
1350
1351 void
1352 g_raid_subdisk_iostart(struct g_raid_subdisk *sd, struct bio *bp)
1353 {
1354         struct g_consumer *cp;
1355         struct g_raid_disk *disk, *tdisk;
1356
1357         bp->bio_caller1 = sd;
1358
1359         /*
1360          * Make sure that the disk is present. Generally it is a task of
1361          * transformation layers to not send requests to absent disks, but
1362          * it is better to be safe and report situation then sorry.
1363          */
1364         if (sd->sd_disk == NULL) {
1365                 G_RAID_LOGREQ(0, bp, "Warning! I/O request to an absent disk!");
1366 nodisk:
1367                 bp->bio_from = NULL;
1368                 bp->bio_to = NULL;
1369                 bp->bio_error = ENXIO;
1370                 g_raid_disk_done(bp);
1371                 return;
1372         }
1373         disk = sd->sd_disk;
1374         if (disk->d_state != G_RAID_DISK_S_ACTIVE &&
1375             disk->d_state != G_RAID_DISK_S_FAILED) {
1376                 G_RAID_LOGREQ(0, bp, "Warning! I/O request to a disk in a "
1377                     "wrong state (%s)!", g_raid_disk_state2str(disk->d_state));
1378                 goto nodisk;
1379         }
1380
1381         cp = disk->d_consumer;
1382         bp->bio_from = cp;
1383         bp->bio_to = cp->provider;
1384         cp->index++;
1385
1386         /* Update average disks load. */
1387         TAILQ_FOREACH(tdisk, &sd->sd_softc->sc_disks, d_next) {
1388                 if (tdisk->d_consumer == NULL)
1389                         tdisk->d_load = 0;
1390                 else
1391                         tdisk->d_load = (tdisk->d_consumer->index *
1392                             G_RAID_SUBDISK_LOAD_SCALE + tdisk->d_load * 7) / 8;
1393         }
1394
1395         disk->d_last_offset = bp->bio_offset + bp->bio_length;
1396         if (dumping) {
1397                 G_RAID_LOGREQ(3, bp, "Sending dumping request.");
1398                 if (bp->bio_cmd == BIO_WRITE) {
1399                         bp->bio_error = g_raid_subdisk_kerneldump(sd,
1400                             bp->bio_data, 0, bp->bio_offset, bp->bio_length);
1401                 } else
1402                         bp->bio_error = EOPNOTSUPP;
1403                 g_raid_disk_done(bp);
1404         } else {
1405                 bp->bio_done = g_raid_disk_done;
1406                 bp->bio_offset += sd->sd_offset;
1407                 G_RAID_LOGREQ(3, bp, "Sending request.");
1408                 g_io_request(bp, cp);
1409         }
1410 }
1411
1412 int
1413 g_raid_subdisk_kerneldump(struct g_raid_subdisk *sd,
1414     void *virtual, vm_offset_t physical, off_t offset, size_t length)
1415 {
1416
1417         if (sd->sd_disk == NULL)
1418                 return (ENXIO);
1419         if (sd->sd_disk->d_kd.di.dumper == NULL)
1420                 return (EOPNOTSUPP);
1421         return (dump_write(&sd->sd_disk->d_kd.di,
1422             virtual, physical,
1423             sd->sd_disk->d_kd.di.mediaoffset + sd->sd_offset + offset,
1424             length));
1425 }
1426
1427 static void
1428 g_raid_disk_done(struct bio *bp)
1429 {
1430         struct g_raid_softc *sc;
1431         struct g_raid_subdisk *sd;
1432
1433         sd = bp->bio_caller1;
1434         sc = sd->sd_softc;
1435         mtx_lock(&sc->sc_queue_mtx);
1436         bioq_insert_tail(&sc->sc_queue, bp);
1437         mtx_unlock(&sc->sc_queue_mtx);
1438         if (!dumping)
1439                 wakeup(sc);
1440 }
1441
1442 static void
1443 g_raid_disk_done_request(struct bio *bp)
1444 {
1445         struct g_raid_softc *sc;
1446         struct g_raid_disk *disk;
1447         struct g_raid_subdisk *sd;
1448         struct g_raid_volume *vol;
1449
1450         g_topology_assert_not();
1451
1452         G_RAID_LOGREQ(3, bp, "Disk request done: %d.", bp->bio_error);
1453         sd = bp->bio_caller1;
1454         sc = sd->sd_softc;
1455         vol = sd->sd_volume;
1456         if (bp->bio_from != NULL) {
1457                 bp->bio_from->index--;
1458                 disk = bp->bio_from->private;
1459                 if (disk == NULL)
1460                         g_raid_kill_consumer(sc, bp->bio_from);
1461         }
1462         bp->bio_offset -= sd->sd_offset;
1463
1464         G_RAID_TR_IODONE(vol->v_tr, sd, bp);
1465 }
1466
1467 static void
1468 g_raid_handle_event(struct g_raid_softc *sc, struct g_raid_event *ep)
1469 {
1470
1471         if ((ep->e_flags & G_RAID_EVENT_VOLUME) != 0)
1472                 ep->e_error = g_raid_update_volume(ep->e_tgt, ep->e_event);
1473         else if ((ep->e_flags & G_RAID_EVENT_DISK) != 0)
1474                 ep->e_error = g_raid_update_disk(ep->e_tgt, ep->e_event);
1475         else if ((ep->e_flags & G_RAID_EVENT_SUBDISK) != 0)
1476                 ep->e_error = g_raid_update_subdisk(ep->e_tgt, ep->e_event);
1477         else
1478                 ep->e_error = g_raid_update_node(ep->e_tgt, ep->e_event);
1479         if ((ep->e_flags & G_RAID_EVENT_WAIT) == 0) {
1480                 KASSERT(ep->e_error == 0,
1481                     ("Error cannot be handled."));
1482                 g_raid_event_free(ep);
1483         } else {
1484                 ep->e_flags |= G_RAID_EVENT_DONE;
1485                 G_RAID_DEBUG1(4, sc, "Waking up %p.", ep);
1486                 mtx_lock(&sc->sc_queue_mtx);
1487                 wakeup(ep);
1488                 mtx_unlock(&sc->sc_queue_mtx);
1489         }
1490 }
1491
1492 /*
1493  * Worker thread.
1494  */
1495 static void
1496 g_raid_worker(void *arg)
1497 {
1498         struct g_raid_softc *sc;
1499         struct g_raid_event *ep;
1500         struct g_raid_volume *vol;
1501         struct bio *bp;
1502         struct timeval now, t;
1503         int timeout, rv;
1504
1505         sc = arg;
1506         thread_lock(curthread);
1507         sched_prio(curthread, PRIBIO);
1508         thread_unlock(curthread);
1509
1510         sx_xlock(&sc->sc_lock);
1511         for (;;) {
1512                 mtx_lock(&sc->sc_queue_mtx);
1513                 /*
1514                  * First take a look at events.
1515                  * This is important to handle events before any I/O requests.
1516                  */
1517                 bp = NULL;
1518                 vol = NULL;
1519                 rv = 0;
1520                 ep = TAILQ_FIRST(&sc->sc_events);
1521                 if (ep != NULL)
1522                         TAILQ_REMOVE(&sc->sc_events, ep, e_next);
1523                 else if ((bp = bioq_takefirst(&sc->sc_queue)) != NULL)
1524                         ;
1525                 else {
1526                         getmicrouptime(&now);
1527                         t = now;
1528                         TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) {
1529                                 if (bioq_first(&vol->v_inflight) == NULL &&
1530                                     vol->v_tr &&
1531                                     timevalcmp(&vol->v_last_done, &t, < ))
1532                                         t = vol->v_last_done;
1533                         }
1534                         timevalsub(&t, &now);
1535                         timeout = g_raid_idle_threshold +
1536                             t.tv_sec * 1000000 + t.tv_usec;
1537                         if (timeout > 0) {
1538                                 /*
1539                                  * Two steps to avoid overflows at HZ=1000
1540                                  * and idle timeouts > 2.1s.  Some rounding
1541                                  * errors can occur, but they are < 1tick,
1542                                  * which is deemed to be close enough for
1543                                  * this purpose.
1544                                  */
1545                                 int micpertic = 1000000 / hz;
1546                                 timeout = (timeout + micpertic - 1) / micpertic;
1547                                 sx_xunlock(&sc->sc_lock);
1548                                 MSLEEP(rv, sc, &sc->sc_queue_mtx,
1549                                     PRIBIO | PDROP, "-", timeout);
1550                                 sx_xlock(&sc->sc_lock);
1551                                 goto process;
1552                         } else
1553                                 rv = EWOULDBLOCK;
1554                 }
1555                 mtx_unlock(&sc->sc_queue_mtx);
1556 process:
1557                 if (ep != NULL) {
1558                         g_raid_handle_event(sc, ep);
1559                 } else if (bp != NULL) {
1560                         if (bp->bio_to != NULL &&
1561                             bp->bio_to->geom == sc->sc_geom)
1562                                 g_raid_start_request(bp);
1563                         else
1564                                 g_raid_disk_done_request(bp);
1565                 } else if (rv == EWOULDBLOCK) {
1566                         TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) {
1567                                 g_raid_clean(vol, -1);
1568                                 if (bioq_first(&vol->v_inflight) == NULL &&
1569                                     vol->v_tr) {
1570                                         t.tv_sec = g_raid_idle_threshold / 1000000;
1571                                         t.tv_usec = g_raid_idle_threshold % 1000000;
1572                                         timevaladd(&t, &vol->v_last_done);
1573                                         getmicrouptime(&now);
1574                                         if (timevalcmp(&t, &now, <= )) {
1575                                                 G_RAID_TR_IDLE(vol->v_tr);
1576                                                 vol->v_last_done = now;
1577                                         }
1578                                 }
1579                         }
1580                 }
1581                 if (sc->sc_stopping == G_RAID_DESTROY_HARD)
1582                         g_raid_destroy_node(sc, 1);     /* May not return. */
1583         }
1584 }
1585
1586 static void
1587 g_raid_poll(struct g_raid_softc *sc)
1588 {
1589         struct g_raid_event *ep;
1590         struct bio *bp;
1591
1592         sx_xlock(&sc->sc_lock);
1593         mtx_lock(&sc->sc_queue_mtx);
1594         /*
1595          * First take a look at events.
1596          * This is important to handle events before any I/O requests.
1597          */
1598         ep = TAILQ_FIRST(&sc->sc_events);
1599         if (ep != NULL) {
1600                 TAILQ_REMOVE(&sc->sc_events, ep, e_next);
1601                 mtx_unlock(&sc->sc_queue_mtx);
1602                 g_raid_handle_event(sc, ep);
1603                 goto out;
1604         }
1605         bp = bioq_takefirst(&sc->sc_queue);
1606         if (bp != NULL) {
1607                 mtx_unlock(&sc->sc_queue_mtx);
1608                 if (bp->bio_from == NULL ||
1609                     bp->bio_from->geom != sc->sc_geom)
1610                         g_raid_start_request(bp);
1611                 else
1612                         g_raid_disk_done_request(bp);
1613         }
1614 out:
1615         sx_xunlock(&sc->sc_lock);
1616 }
1617
1618 static void
1619 g_raid_launch_provider(struct g_raid_volume *vol)
1620 {
1621         struct g_raid_disk *disk;
1622         struct g_raid_subdisk *sd;
1623         struct g_raid_softc *sc;
1624         struct g_provider *pp;
1625         char name[G_RAID_MAX_VOLUMENAME];
1626         off_t off;
1627         int i;
1628
1629         sc = vol->v_softc;
1630         sx_assert(&sc->sc_lock, SX_LOCKED);
1631
1632         g_topology_lock();
1633         /* Try to name provider with volume name. */
1634         snprintf(name, sizeof(name), "raid/%s", vol->v_name);
1635         if (g_raid_name_format == 0 || vol->v_name[0] == 0 ||
1636             g_provider_by_name(name) != NULL) {
1637                 /* Otherwise use sequential volume number. */
1638                 snprintf(name, sizeof(name), "raid/r%d", vol->v_global_id);
1639         }
1640
1641         pp = g_new_providerf(sc->sc_geom, "%s", name);
1642         pp->flags |= G_PF_DIRECT_RECEIVE;
1643         if (vol->v_tr->tro_class->trc_accept_unmapped) {
1644                 pp->flags |= G_PF_ACCEPT_UNMAPPED;
1645                 for (i = 0; i < vol->v_disks_count; i++) {
1646                         sd = &vol->v_subdisks[i];
1647                         if (sd->sd_state == G_RAID_SUBDISK_S_NONE)
1648                                 continue;
1649                         if ((sd->sd_disk->d_consumer->provider->flags &
1650                             G_PF_ACCEPT_UNMAPPED) == 0)
1651                                 pp->flags &= ~G_PF_ACCEPT_UNMAPPED;
1652                 }
1653         }
1654         pp->private = vol;
1655         pp->mediasize = vol->v_mediasize;
1656         pp->sectorsize = vol->v_sectorsize;
1657         pp->stripesize = 0;
1658         pp->stripeoffset = 0;
1659         if (vol->v_raid_level == G_RAID_VOLUME_RL_RAID1 ||
1660             vol->v_raid_level == G_RAID_VOLUME_RL_RAID3 ||
1661             vol->v_raid_level == G_RAID_VOLUME_RL_SINGLE ||
1662             vol->v_raid_level == G_RAID_VOLUME_RL_CONCAT) {
1663                 if ((disk = vol->v_subdisks[0].sd_disk) != NULL &&
1664                     disk->d_consumer != NULL &&
1665                     disk->d_consumer->provider != NULL) {
1666                         pp->stripesize = disk->d_consumer->provider->stripesize;
1667                         off = disk->d_consumer->provider->stripeoffset;
1668                         pp->stripeoffset = off + vol->v_subdisks[0].sd_offset;
1669                         if (off > 0)
1670                                 pp->stripeoffset %= off;
1671                 }
1672                 if (vol->v_raid_level == G_RAID_VOLUME_RL_RAID3) {
1673                         pp->stripesize *= (vol->v_disks_count - 1);
1674                         pp->stripeoffset *= (vol->v_disks_count - 1);
1675                 }
1676         } else
1677                 pp->stripesize = vol->v_strip_size;
1678         vol->v_provider = pp;
1679         g_error_provider(pp, 0);
1680         g_topology_unlock();
1681         G_RAID_DEBUG1(0, sc, "Provider %s for volume %s created.",
1682             pp->name, vol->v_name);
1683 }
1684
1685 static void
1686 g_raid_destroy_provider(struct g_raid_volume *vol)
1687 {
1688         struct g_raid_softc *sc;
1689         struct g_provider *pp;
1690         struct bio *bp, *tmp;
1691
1692         g_topology_assert_not();
1693         sc = vol->v_softc;
1694         pp = vol->v_provider;
1695         KASSERT(pp != NULL, ("NULL provider (volume=%s).", vol->v_name));
1696
1697         g_topology_lock();
1698         g_error_provider(pp, ENXIO);
1699         mtx_lock(&sc->sc_queue_mtx);
1700         TAILQ_FOREACH_SAFE(bp, &sc->sc_queue.queue, bio_queue, tmp) {
1701                 if (bp->bio_to != pp)
1702                         continue;
1703                 bioq_remove(&sc->sc_queue, bp);
1704                 g_io_deliver(bp, ENXIO);
1705         }
1706         mtx_unlock(&sc->sc_queue_mtx);
1707         G_RAID_DEBUG1(0, sc, "Provider %s for volume %s destroyed.",
1708             pp->name, vol->v_name);
1709         g_wither_provider(pp, ENXIO);
1710         g_topology_unlock();
1711         vol->v_provider = NULL;
1712 }
1713
1714 /*
1715  * Update device state.
1716  */
1717 static int
1718 g_raid_update_volume(struct g_raid_volume *vol, u_int event)
1719 {
1720         struct g_raid_softc *sc;
1721
1722         sc = vol->v_softc;
1723         sx_assert(&sc->sc_lock, SX_XLOCKED);
1724
1725         G_RAID_DEBUG1(2, sc, "Event %s for volume %s.",
1726             g_raid_volume_event2str(event),
1727             vol->v_name);
1728         switch (event) {
1729         case G_RAID_VOLUME_E_DOWN:
1730                 if (vol->v_provider != NULL)
1731                         g_raid_destroy_provider(vol);
1732                 break;
1733         case G_RAID_VOLUME_E_UP:
1734                 if (vol->v_provider == NULL)
1735                         g_raid_launch_provider(vol);
1736                 break;
1737         case G_RAID_VOLUME_E_START:
1738                 if (vol->v_tr)
1739                         G_RAID_TR_START(vol->v_tr);
1740                 return (0);
1741         default:
1742                 if (sc->sc_md)
1743                         G_RAID_MD_VOLUME_EVENT(sc->sc_md, vol, event);
1744                 return (0);
1745         }
1746
1747         /* Manage root mount release. */
1748         if (vol->v_starting) {
1749                 vol->v_starting = 0;
1750                 G_RAID_DEBUG1(1, sc, "root_mount_rel %p", vol->v_rootmount);
1751                 root_mount_rel(vol->v_rootmount);
1752                 vol->v_rootmount = NULL;
1753         }
1754         if (vol->v_stopping && vol->v_provider_open == 0)
1755                 g_raid_destroy_volume(vol);
1756         return (0);
1757 }
1758
1759 /*
1760  * Update subdisk state.
1761  */
1762 static int
1763 g_raid_update_subdisk(struct g_raid_subdisk *sd, u_int event)
1764 {
1765         struct g_raid_softc *sc;
1766         struct g_raid_volume *vol;
1767
1768         sc = sd->sd_softc;
1769         vol = sd->sd_volume;
1770         sx_assert(&sc->sc_lock, SX_XLOCKED);
1771
1772         G_RAID_DEBUG1(2, sc, "Event %s for subdisk %s:%d-%s.",
1773             g_raid_subdisk_event2str(event),
1774             vol->v_name, sd->sd_pos,
1775             sd->sd_disk ? g_raid_get_diskname(sd->sd_disk) : "[none]");
1776         if (vol->v_tr)
1777                 G_RAID_TR_EVENT(vol->v_tr, sd, event);
1778
1779         return (0);
1780 }
1781
1782 /*
1783  * Update disk state.
1784  */
1785 static int
1786 g_raid_update_disk(struct g_raid_disk *disk, u_int event)
1787 {
1788         struct g_raid_softc *sc;
1789
1790         sc = disk->d_softc;
1791         sx_assert(&sc->sc_lock, SX_XLOCKED);
1792
1793         G_RAID_DEBUG1(2, sc, "Event %s for disk %s.",
1794             g_raid_disk_event2str(event),
1795             g_raid_get_diskname(disk));
1796
1797         if (sc->sc_md)
1798                 G_RAID_MD_EVENT(sc->sc_md, disk, event);
1799         return (0);
1800 }
1801
1802 /*
1803  * Node event.
1804  */
1805 static int
1806 g_raid_update_node(struct g_raid_softc *sc, u_int event)
1807 {
1808         sx_assert(&sc->sc_lock, SX_XLOCKED);
1809
1810         G_RAID_DEBUG1(2, sc, "Event %s for the array.",
1811             g_raid_node_event2str(event));
1812
1813         if (event == G_RAID_NODE_E_WAKE)
1814                 return (0);
1815         if (sc->sc_md)
1816                 G_RAID_MD_EVENT(sc->sc_md, NULL, event);
1817         return (0);
1818 }
1819
1820 static int
1821 g_raid_access(struct g_provider *pp, int acr, int acw, int ace)
1822 {
1823         struct g_raid_volume *vol;
1824         struct g_raid_softc *sc;
1825         int dcw, opens, error = 0;
1826
1827         g_topology_assert();
1828         sc = pp->geom->softc;
1829         vol = pp->private;
1830         KASSERT(sc != NULL, ("NULL softc (provider=%s).", pp->name));
1831         KASSERT(vol != NULL, ("NULL volume (provider=%s).", pp->name));
1832
1833         G_RAID_DEBUG1(2, sc, "Access request for %s: r%dw%de%d.", pp->name,
1834             acr, acw, ace);
1835         dcw = pp->acw + acw;
1836
1837         g_topology_unlock();
1838         sx_xlock(&sc->sc_lock);
1839         /* Deny new opens while dying. */
1840         if (sc->sc_stopping != 0 && (acr > 0 || acw > 0 || ace > 0)) {
1841                 error = ENXIO;
1842                 goto out;
1843         }
1844         /* Deny write opens for read-only volumes. */
1845         if (vol->v_read_only && acw > 0) {
1846                 error = EROFS;
1847                 goto out;
1848         }
1849         if (dcw == 0)
1850                 g_raid_clean(vol, dcw);
1851         vol->v_provider_open += acr + acw + ace;
1852         /* Handle delayed node destruction. */
1853         if (sc->sc_stopping == G_RAID_DESTROY_DELAYED &&
1854             vol->v_provider_open == 0) {
1855                 /* Count open volumes. */
1856                 opens = g_raid_nopens(sc);
1857                 if (opens == 0) {
1858                         sc->sc_stopping = G_RAID_DESTROY_HARD;
1859                         /* Wake up worker to make it selfdestruct. */
1860                         g_raid_event_send(sc, G_RAID_NODE_E_WAKE, 0);
1861                 }
1862         }
1863         /* Handle open volume destruction. */
1864         if (vol->v_stopping && vol->v_provider_open == 0)
1865                 g_raid_destroy_volume(vol);
1866 out:
1867         sx_xunlock(&sc->sc_lock);
1868         g_topology_lock();
1869         return (error);
1870 }
1871
1872 struct g_raid_softc *
1873 g_raid_create_node(struct g_class *mp,
1874     const char *name, struct g_raid_md_object *md)
1875 {
1876         struct g_raid_softc *sc;
1877         struct g_geom *gp;
1878         int error;
1879
1880         g_topology_assert();
1881         G_RAID_DEBUG(1, "Creating array %s.", name);
1882
1883         gp = g_new_geomf(mp, "%s", name);
1884         sc = malloc(sizeof(*sc), M_RAID, M_WAITOK | M_ZERO);
1885         gp->start = g_raid_start;
1886         gp->orphan = g_raid_orphan;
1887         gp->access = g_raid_access;
1888         gp->dumpconf = g_raid_dumpconf;
1889
1890         sc->sc_md = md;
1891         sc->sc_geom = gp;
1892         sc->sc_flags = 0;
1893         TAILQ_INIT(&sc->sc_volumes);
1894         TAILQ_INIT(&sc->sc_disks);
1895         sx_init(&sc->sc_lock, "graid:lock");
1896         mtx_init(&sc->sc_queue_mtx, "graid:queue", NULL, MTX_DEF);
1897         TAILQ_INIT(&sc->sc_events);
1898         bioq_init(&sc->sc_queue);
1899         gp->softc = sc;
1900         error = kproc_create(g_raid_worker, sc, &sc->sc_worker, 0, 0,
1901             "g_raid %s", name);
1902         if (error != 0) {
1903                 G_RAID_DEBUG(0, "Cannot create kernel thread for %s.", name);
1904                 mtx_destroy(&sc->sc_queue_mtx);
1905                 sx_destroy(&sc->sc_lock);
1906                 g_destroy_geom(sc->sc_geom);
1907                 free(sc, M_RAID);
1908                 return (NULL);
1909         }
1910
1911         G_RAID_DEBUG1(0, sc, "Array %s created.", name);
1912         return (sc);
1913 }
1914
1915 struct g_raid_volume *
1916 g_raid_create_volume(struct g_raid_softc *sc, const char *name, int id)
1917 {
1918         struct g_raid_volume    *vol, *vol1;
1919         int i;
1920
1921         G_RAID_DEBUG1(1, sc, "Creating volume %s.", name);
1922         vol = malloc(sizeof(*vol), M_RAID, M_WAITOK | M_ZERO);
1923         vol->v_softc = sc;
1924         strlcpy(vol->v_name, name, G_RAID_MAX_VOLUMENAME);
1925         vol->v_state = G_RAID_VOLUME_S_STARTING;
1926         vol->v_raid_level = G_RAID_VOLUME_RL_UNKNOWN;
1927         vol->v_raid_level_qualifier = G_RAID_VOLUME_RLQ_UNKNOWN;
1928         vol->v_rotate_parity = 1;
1929         bioq_init(&vol->v_inflight);
1930         bioq_init(&vol->v_locked);
1931         LIST_INIT(&vol->v_locks);
1932         for (i = 0; i < G_RAID_MAX_SUBDISKS; i++) {
1933                 vol->v_subdisks[i].sd_softc = sc;
1934                 vol->v_subdisks[i].sd_volume = vol;
1935                 vol->v_subdisks[i].sd_pos = i;
1936                 vol->v_subdisks[i].sd_state = G_RAID_DISK_S_NONE;
1937         }
1938
1939         /* Find free ID for this volume. */
1940         g_topology_lock();
1941         vol1 = vol;
1942         if (id >= 0) {
1943                 LIST_FOREACH(vol1, &g_raid_volumes, v_global_next) {
1944                         if (vol1->v_global_id == id)
1945                                 break;
1946                 }
1947         }
1948         if (vol1 != NULL) {
1949                 for (id = 0; ; id++) {
1950                         LIST_FOREACH(vol1, &g_raid_volumes, v_global_next) {
1951                                 if (vol1->v_global_id == id)
1952                                         break;
1953                         }
1954                         if (vol1 == NULL)
1955                                 break;
1956                 }
1957         }
1958         vol->v_global_id = id;
1959         LIST_INSERT_HEAD(&g_raid_volumes, vol, v_global_next);
1960         g_topology_unlock();
1961
1962         /* Delay root mounting. */
1963         vol->v_rootmount = root_mount_hold("GRAID");
1964         G_RAID_DEBUG1(1, sc, "root_mount_hold %p", vol->v_rootmount);
1965         vol->v_starting = 1;
1966         TAILQ_INSERT_TAIL(&sc->sc_volumes, vol, v_next);
1967         return (vol);
1968 }
1969
1970 struct g_raid_disk *
1971 g_raid_create_disk(struct g_raid_softc *sc)
1972 {
1973         struct g_raid_disk      *disk;
1974
1975         G_RAID_DEBUG1(1, sc, "Creating disk.");
1976         disk = malloc(sizeof(*disk), M_RAID, M_WAITOK | M_ZERO);
1977         disk->d_softc = sc;
1978         disk->d_state = G_RAID_DISK_S_NONE;
1979         TAILQ_INIT(&disk->d_subdisks);
1980         TAILQ_INSERT_TAIL(&sc->sc_disks, disk, d_next);
1981         return (disk);
1982 }
1983
1984 int g_raid_start_volume(struct g_raid_volume *vol)
1985 {
1986         struct g_raid_tr_class *class;
1987         struct g_raid_tr_object *obj;
1988         int status;
1989
1990         G_RAID_DEBUG1(2, vol->v_softc, "Starting volume %s.", vol->v_name);
1991         LIST_FOREACH(class, &g_raid_tr_classes, trc_list) {
1992                 if (!class->trc_enable)
1993                         continue;
1994                 G_RAID_DEBUG1(2, vol->v_softc,
1995                     "Tasting volume %s for %s transformation.",
1996                     vol->v_name, class->name);
1997                 obj = (void *)kobj_create((kobj_class_t)class, M_RAID,
1998                     M_WAITOK);
1999                 obj->tro_class = class;
2000                 obj->tro_volume = vol;
2001                 status = G_RAID_TR_TASTE(obj, vol);
2002                 if (status != G_RAID_TR_TASTE_FAIL)
2003                         break;
2004                 kobj_delete((kobj_t)obj, M_RAID);
2005         }
2006         if (class == NULL) {
2007                 G_RAID_DEBUG1(0, vol->v_softc,
2008                     "No transformation module found for %s.",
2009                     vol->v_name);
2010                 vol->v_tr = NULL;
2011                 g_raid_change_volume_state(vol, G_RAID_VOLUME_S_UNSUPPORTED);
2012                 g_raid_event_send(vol, G_RAID_VOLUME_E_DOWN,
2013                     G_RAID_EVENT_VOLUME);
2014                 return (-1);
2015         }
2016         G_RAID_DEBUG1(2, vol->v_softc,
2017             "Transformation module %s chosen for %s.",
2018             class->name, vol->v_name);
2019         vol->v_tr = obj;
2020         return (0);
2021 }
2022
2023 int
2024 g_raid_destroy_node(struct g_raid_softc *sc, int worker)
2025 {
2026         struct g_raid_volume *vol, *tmpv;
2027         struct g_raid_disk *disk, *tmpd;
2028         int error = 0;
2029
2030         sc->sc_stopping = G_RAID_DESTROY_HARD;
2031         TAILQ_FOREACH_SAFE(vol, &sc->sc_volumes, v_next, tmpv) {
2032                 if (g_raid_destroy_volume(vol))
2033                         error = EBUSY;
2034         }
2035         if (error)
2036                 return (error);
2037         TAILQ_FOREACH_SAFE(disk, &sc->sc_disks, d_next, tmpd) {
2038                 if (g_raid_destroy_disk(disk))
2039                         error = EBUSY;
2040         }
2041         if (error)
2042                 return (error);
2043         if (sc->sc_md) {
2044                 G_RAID_MD_FREE(sc->sc_md);
2045                 kobj_delete((kobj_t)sc->sc_md, M_RAID);
2046                 sc->sc_md = NULL;
2047         }
2048         if (sc->sc_geom != NULL) {
2049                 G_RAID_DEBUG1(0, sc, "Array %s destroyed.", sc->sc_name);
2050                 g_topology_lock();
2051                 sc->sc_geom->softc = NULL;
2052                 g_wither_geom(sc->sc_geom, ENXIO);
2053                 g_topology_unlock();
2054                 sc->sc_geom = NULL;
2055         } else
2056                 G_RAID_DEBUG(1, "Array destroyed.");
2057         if (worker) {
2058                 g_raid_event_cancel(sc, sc);
2059                 mtx_destroy(&sc->sc_queue_mtx);
2060                 sx_xunlock(&sc->sc_lock);
2061                 sx_destroy(&sc->sc_lock);
2062                 wakeup(&sc->sc_stopping);
2063                 free(sc, M_RAID);
2064                 curthread->td_pflags &= ~TDP_GEOM;
2065                 G_RAID_DEBUG(1, "Thread exiting.");
2066                 kproc_exit(0);
2067         } else {
2068                 /* Wake up worker to make it selfdestruct. */
2069                 g_raid_event_send(sc, G_RAID_NODE_E_WAKE, 0);
2070         }
2071         return (0);
2072 }
2073
2074 int
2075 g_raid_destroy_volume(struct g_raid_volume *vol)
2076 {
2077         struct g_raid_softc *sc;
2078         struct g_raid_disk *disk;
2079         int i;
2080
2081         sc = vol->v_softc;
2082         G_RAID_DEBUG1(2, sc, "Destroying volume %s.", vol->v_name);
2083         vol->v_stopping = 1;
2084         if (vol->v_state != G_RAID_VOLUME_S_STOPPED) {
2085                 if (vol->v_tr) {
2086                         G_RAID_TR_STOP(vol->v_tr);
2087                         return (EBUSY);
2088                 } else
2089                         vol->v_state = G_RAID_VOLUME_S_STOPPED;
2090         }
2091         if (g_raid_event_check(sc, vol) != 0)
2092                 return (EBUSY);
2093         if (vol->v_provider != NULL)
2094                 return (EBUSY);
2095         if (vol->v_provider_open != 0)
2096                 return (EBUSY);
2097         if (vol->v_tr) {
2098                 G_RAID_TR_FREE(vol->v_tr);
2099                 kobj_delete((kobj_t)vol->v_tr, M_RAID);
2100                 vol->v_tr = NULL;
2101         }
2102         if (vol->v_rootmount)
2103                 root_mount_rel(vol->v_rootmount);
2104         g_topology_lock();
2105         LIST_REMOVE(vol, v_global_next);
2106         g_topology_unlock();
2107         TAILQ_REMOVE(&sc->sc_volumes, vol, v_next);
2108         for (i = 0; i < G_RAID_MAX_SUBDISKS; i++) {
2109                 g_raid_event_cancel(sc, &vol->v_subdisks[i]);
2110                 disk = vol->v_subdisks[i].sd_disk;
2111                 if (disk == NULL)
2112                         continue;
2113                 TAILQ_REMOVE(&disk->d_subdisks, &vol->v_subdisks[i], sd_next);
2114         }
2115         G_RAID_DEBUG1(2, sc, "Volume %s destroyed.", vol->v_name);
2116         if (sc->sc_md)
2117                 G_RAID_MD_FREE_VOLUME(sc->sc_md, vol);
2118         g_raid_event_cancel(sc, vol);
2119         free(vol, M_RAID);
2120         if (sc->sc_stopping == G_RAID_DESTROY_HARD) {
2121                 /* Wake up worker to let it selfdestruct. */
2122                 g_raid_event_send(sc, G_RAID_NODE_E_WAKE, 0);
2123         }
2124         return (0);
2125 }
2126
2127 int
2128 g_raid_destroy_disk(struct g_raid_disk *disk)
2129 {
2130         struct g_raid_softc *sc;
2131         struct g_raid_subdisk *sd, *tmp;
2132
2133         sc = disk->d_softc;
2134         G_RAID_DEBUG1(2, sc, "Destroying disk.");
2135         if (disk->d_consumer) {
2136                 g_raid_kill_consumer(sc, disk->d_consumer);
2137                 disk->d_consumer = NULL;
2138         }
2139         TAILQ_FOREACH_SAFE(sd, &disk->d_subdisks, sd_next, tmp) {
2140                 g_raid_change_subdisk_state(sd, G_RAID_SUBDISK_S_NONE);
2141                 g_raid_event_send(sd, G_RAID_SUBDISK_E_DISCONNECTED,
2142                     G_RAID_EVENT_SUBDISK);
2143                 TAILQ_REMOVE(&disk->d_subdisks, sd, sd_next);
2144                 sd->sd_disk = NULL;
2145         }
2146         TAILQ_REMOVE(&sc->sc_disks, disk, d_next);
2147         if (sc->sc_md)
2148                 G_RAID_MD_FREE_DISK(sc->sc_md, disk);
2149         g_raid_event_cancel(sc, disk);
2150         free(disk, M_RAID);
2151         return (0);
2152 }
2153
2154 int
2155 g_raid_destroy(struct g_raid_softc *sc, int how)
2156 {
2157         int error, opens;
2158
2159         g_topology_assert_not();
2160         if (sc == NULL)
2161                 return (ENXIO);
2162         sx_assert(&sc->sc_lock, SX_XLOCKED);
2163
2164         /* Count open volumes. */
2165         opens = g_raid_nopens(sc);
2166
2167         /* React on some opened volumes. */
2168         if (opens > 0) {
2169                 switch (how) {
2170                 case G_RAID_DESTROY_SOFT:
2171                         G_RAID_DEBUG1(1, sc,
2172                             "%d volumes are still open.",
2173                             opens);
2174                         sx_xunlock(&sc->sc_lock);
2175                         return (EBUSY);
2176                 case G_RAID_DESTROY_DELAYED:
2177                         G_RAID_DEBUG1(1, sc,
2178                             "Array will be destroyed on last close.");
2179                         sc->sc_stopping = G_RAID_DESTROY_DELAYED;
2180                         sx_xunlock(&sc->sc_lock);
2181                         return (EBUSY);
2182                 case G_RAID_DESTROY_HARD:
2183                         G_RAID_DEBUG1(1, sc,
2184                             "%d volumes are still open.",
2185                             opens);
2186                 }
2187         }
2188
2189         /* Mark node for destruction. */
2190         sc->sc_stopping = G_RAID_DESTROY_HARD;
2191         /* Wake up worker to let it selfdestruct. */
2192         g_raid_event_send(sc, G_RAID_NODE_E_WAKE, 0);
2193         /* Sleep until node destroyed. */
2194         error = sx_sleep(&sc->sc_stopping, &sc->sc_lock,
2195             PRIBIO | PDROP, "r:destroy", hz * 3);
2196         return (error == EWOULDBLOCK ? EBUSY : 0);
2197 }
2198
2199 static void
2200 g_raid_taste_orphan(struct g_consumer *cp)
2201 {
2202
2203         KASSERT(1 == 0, ("%s called while tasting %s.", __func__,
2204             cp->provider->name));
2205 }
2206
2207 static struct g_geom *
2208 g_raid_taste(struct g_class *mp, struct g_provider *pp, int flags __unused)
2209 {
2210         struct g_consumer *cp;
2211         struct g_geom *gp, *geom;
2212         struct g_raid_md_class *class;
2213         struct g_raid_md_object *obj;
2214         int status;
2215
2216         g_topology_assert();
2217         g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name);
2218         if (!g_raid_enable)
2219                 return (NULL);
2220         G_RAID_DEBUG(2, "Tasting provider %s.", pp->name);
2221
2222         geom = NULL;
2223         status = G_RAID_MD_TASTE_FAIL;
2224         gp = g_new_geomf(mp, "raid:taste");
2225         /*
2226          * This orphan function should be never called.
2227          */
2228         gp->orphan = g_raid_taste_orphan;
2229         cp = g_new_consumer(gp);
2230         cp->flags |= G_CF_DIRECT_RECEIVE;
2231         if (g_attach(cp, pp) != 0)
2232                 goto ofail2;
2233         if (g_access(cp, 1, 0, 0) != 0)
2234                 goto ofail;
2235
2236         LIST_FOREACH(class, &g_raid_md_classes, mdc_list) {
2237                 if (!class->mdc_enable)
2238                         continue;
2239                 G_RAID_DEBUG(2, "Tasting provider %s for %s metadata.",
2240                     pp->name, class->name);
2241                 obj = (void *)kobj_create((kobj_class_t)class, M_RAID,
2242                     M_WAITOK);
2243                 obj->mdo_class = class;
2244                 status = G_RAID_MD_TASTE(obj, mp, cp, &geom);
2245                 if (status != G_RAID_MD_TASTE_NEW)
2246                         kobj_delete((kobj_t)obj, M_RAID);
2247                 if (status != G_RAID_MD_TASTE_FAIL)
2248                         break;
2249         }
2250
2251         if (status == G_RAID_MD_TASTE_FAIL)
2252                 (void)g_access(cp, -1, 0, 0);
2253 ofail:
2254         g_detach(cp);
2255 ofail2:
2256         g_destroy_consumer(cp);
2257         g_destroy_geom(gp);
2258         G_RAID_DEBUG(2, "Tasting provider %s done.", pp->name);
2259         return (geom);
2260 }
2261
2262 int
2263 g_raid_create_node_format(const char *format, struct gctl_req *req,
2264     struct g_geom **gp)
2265 {
2266         struct g_raid_md_class *class;
2267         struct g_raid_md_object *obj;
2268         int status;
2269
2270         G_RAID_DEBUG(2, "Creating array for %s metadata.", format);
2271         LIST_FOREACH(class, &g_raid_md_classes, mdc_list) {
2272                 if (strcasecmp(class->name, format) == 0)
2273                         break;
2274         }
2275         if (class == NULL) {
2276                 G_RAID_DEBUG(1, "No support for %s metadata.", format);
2277                 return (G_RAID_MD_TASTE_FAIL);
2278         }
2279         obj = (void *)kobj_create((kobj_class_t)class, M_RAID,
2280             M_WAITOK);
2281         obj->mdo_class = class;
2282         status = G_RAID_MD_CREATE_REQ(obj, &g_raid_class, req, gp);
2283         if (status != G_RAID_MD_TASTE_NEW)
2284                 kobj_delete((kobj_t)obj, M_RAID);
2285         return (status);
2286 }
2287
2288 static int
2289 g_raid_destroy_geom(struct gctl_req *req __unused,
2290     struct g_class *mp __unused, struct g_geom *gp)
2291 {
2292         struct g_raid_softc *sc;
2293         int error;
2294
2295         g_topology_unlock();
2296         sc = gp->softc;
2297         sx_xlock(&sc->sc_lock);
2298         g_cancel_event(sc);
2299         error = g_raid_destroy(gp->softc, G_RAID_DESTROY_SOFT);
2300         g_topology_lock();
2301         return (error);
2302 }
2303
2304 void g_raid_write_metadata(struct g_raid_softc *sc, struct g_raid_volume *vol,
2305     struct g_raid_subdisk *sd, struct g_raid_disk *disk)
2306 {
2307
2308         if (sc->sc_stopping == G_RAID_DESTROY_HARD)
2309                 return;
2310         if (sc->sc_md)
2311                 G_RAID_MD_WRITE(sc->sc_md, vol, sd, disk);
2312 }
2313
2314 void g_raid_fail_disk(struct g_raid_softc *sc,
2315     struct g_raid_subdisk *sd, struct g_raid_disk *disk)
2316 {
2317
2318         if (disk == NULL)
2319                 disk = sd->sd_disk;
2320         if (disk == NULL) {
2321                 G_RAID_DEBUG1(0, sc, "Warning! Fail request to an absent disk!");
2322                 return;
2323         }
2324         if (disk->d_state != G_RAID_DISK_S_ACTIVE) {
2325                 G_RAID_DEBUG1(0, sc, "Warning! Fail request to a disk in a "
2326                     "wrong state (%s)!", g_raid_disk_state2str(disk->d_state));
2327                 return;
2328         }
2329         if (sc->sc_md)
2330                 G_RAID_MD_FAIL_DISK(sc->sc_md, sd, disk);
2331 }
2332
2333 static void
2334 g_raid_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp,
2335     struct g_consumer *cp, struct g_provider *pp)
2336 {
2337         struct g_raid_softc *sc;
2338         struct g_raid_volume *vol;
2339         struct g_raid_subdisk *sd;
2340         struct g_raid_disk *disk;
2341         int i, s;
2342
2343         g_topology_assert();
2344
2345         sc = gp->softc;
2346         if (sc == NULL)
2347                 return;
2348         if (pp != NULL) {
2349                 vol = pp->private;
2350                 g_topology_unlock();
2351                 sx_xlock(&sc->sc_lock);
2352                 sbuf_printf(sb, "%s<descr>%s %s volume</descr>\n", indent,
2353                     sc->sc_md->mdo_class->name,
2354                     g_raid_volume_level2str(vol->v_raid_level,
2355                     vol->v_raid_level_qualifier));
2356                 sbuf_printf(sb, "%s<Label>%s</Label>\n", indent,
2357                     vol->v_name);
2358                 sbuf_printf(sb, "%s<RAIDLevel>%s</RAIDLevel>\n", indent,
2359                     g_raid_volume_level2str(vol->v_raid_level,
2360                     vol->v_raid_level_qualifier));
2361                 sbuf_printf(sb,
2362                     "%s<Transformation>%s</Transformation>\n", indent,
2363                     vol->v_tr ? vol->v_tr->tro_class->name : "NONE");
2364                 sbuf_printf(sb, "%s<Components>%u</Components>\n", indent,
2365                     vol->v_disks_count);
2366                 sbuf_printf(sb, "%s<Strip>%u</Strip>\n", indent,
2367                     vol->v_strip_size);
2368                 sbuf_printf(sb, "%s<State>%s</State>\n", indent,
2369                     g_raid_volume_state2str(vol->v_state));
2370                 sbuf_printf(sb, "%s<Dirty>%s</Dirty>\n", indent,
2371                     vol->v_dirty ? "Yes" : "No");
2372                 sbuf_printf(sb, "%s<Subdisks>", indent);
2373                 for (i = 0; i < vol->v_disks_count; i++) {
2374                         sd = &vol->v_subdisks[i];
2375                         if (sd->sd_disk != NULL &&
2376                             sd->sd_disk->d_consumer != NULL) {
2377                                 sbuf_printf(sb, "%s ",
2378                                     g_raid_get_diskname(sd->sd_disk));
2379                         } else {
2380                                 sbuf_cat(sb, "NONE ");
2381                         }
2382                         sbuf_printf(sb, "(%s",
2383                             g_raid_subdisk_state2str(sd->sd_state));
2384                         if (sd->sd_state == G_RAID_SUBDISK_S_REBUILD ||
2385                             sd->sd_state == G_RAID_SUBDISK_S_RESYNC) {
2386                                 sbuf_printf(sb, " %d%%",
2387                                     (int)(sd->sd_rebuild_pos * 100 /
2388                                      sd->sd_size));
2389                         }
2390                         sbuf_cat(sb, ")");
2391                         if (i + 1 < vol->v_disks_count)
2392                                 sbuf_cat(sb, ", ");
2393                 }
2394                 sbuf_cat(sb, "</Subdisks>\n");
2395                 sx_xunlock(&sc->sc_lock);
2396                 g_topology_lock();
2397         } else if (cp != NULL) {
2398                 disk = cp->private;
2399                 if (disk == NULL)
2400                         return;
2401                 g_topology_unlock();
2402                 sx_xlock(&sc->sc_lock);
2403                 sbuf_printf(sb, "%s<State>%s", indent,
2404                     g_raid_disk_state2str(disk->d_state));
2405                 if (!TAILQ_EMPTY(&disk->d_subdisks)) {
2406                         sbuf_cat(sb, " (");
2407                         TAILQ_FOREACH(sd, &disk->d_subdisks, sd_next) {
2408                                 sbuf_printf(sb, "%s",
2409                                     g_raid_subdisk_state2str(sd->sd_state));
2410                                 if (sd->sd_state == G_RAID_SUBDISK_S_REBUILD ||
2411                                     sd->sd_state == G_RAID_SUBDISK_S_RESYNC) {
2412                                         sbuf_printf(sb, " %d%%",
2413                                             (int)(sd->sd_rebuild_pos * 100 /
2414                                              sd->sd_size));
2415                                 }
2416                                 if (TAILQ_NEXT(sd, sd_next))
2417                                         sbuf_cat(sb, ", ");
2418                         }
2419                         sbuf_cat(sb, ")");
2420                 }
2421                 sbuf_cat(sb, "</State>\n");
2422                 sbuf_printf(sb, "%s<Subdisks>", indent);
2423                 TAILQ_FOREACH(sd, &disk->d_subdisks, sd_next) {
2424                         sbuf_printf(sb, "r%d(%s):%d@%ju",
2425                             sd->sd_volume->v_global_id,
2426                             sd->sd_volume->v_name,
2427                             sd->sd_pos, (uintmax_t)sd->sd_offset);
2428                         if (TAILQ_NEXT(sd, sd_next))
2429                                 sbuf_cat(sb, ", ");
2430                 }
2431                 sbuf_cat(sb, "</Subdisks>\n");
2432                 sbuf_printf(sb, "%s<ReadErrors>%d</ReadErrors>\n", indent,
2433                     disk->d_read_errs);
2434                 sx_xunlock(&sc->sc_lock);
2435                 g_topology_lock();
2436         } else {
2437                 g_topology_unlock();
2438                 sx_xlock(&sc->sc_lock);
2439                 if (sc->sc_md) {
2440                         sbuf_printf(sb, "%s<Metadata>%s</Metadata>\n", indent,
2441                             sc->sc_md->mdo_class->name);
2442                 }
2443                 if (!TAILQ_EMPTY(&sc->sc_volumes)) {
2444                         s = 0xff;
2445                         TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) {
2446                                 if (vol->v_state < s)
2447                                         s = vol->v_state;
2448                         }
2449                         sbuf_printf(sb, "%s<State>%s</State>\n", indent,
2450                             g_raid_volume_state2str(s));
2451                 }
2452                 sx_xunlock(&sc->sc_lock);
2453                 g_topology_lock();
2454         }
2455 }
2456
2457 static void
2458 g_raid_shutdown_post_sync(void *arg, int howto)
2459 {
2460         struct g_class *mp;
2461         struct g_geom *gp, *gp2;
2462         struct g_raid_softc *sc;
2463         struct g_raid_volume *vol;
2464
2465         mp = arg;
2466         g_topology_lock();
2467         g_raid_shutdown = 1;
2468         LIST_FOREACH_SAFE(gp, &mp->geom, geom, gp2) {
2469                 if ((sc = gp->softc) == NULL)
2470                         continue;
2471                 g_topology_unlock();
2472                 sx_xlock(&sc->sc_lock);
2473                 TAILQ_FOREACH(vol, &sc->sc_volumes, v_next)
2474                         g_raid_clean(vol, -1);
2475                 g_cancel_event(sc);
2476                 g_raid_destroy(sc, G_RAID_DESTROY_DELAYED);
2477                 g_topology_lock();
2478         }
2479         g_topology_unlock();
2480 }
2481
2482 static void
2483 g_raid_init(struct g_class *mp)
2484 {
2485
2486         g_raid_post_sync = EVENTHANDLER_REGISTER(shutdown_post_sync,
2487             g_raid_shutdown_post_sync, mp, SHUTDOWN_PRI_FIRST);
2488         if (g_raid_post_sync == NULL)
2489                 G_RAID_DEBUG(0, "Warning! Cannot register shutdown event.");
2490         g_raid_started = 1;
2491 }
2492
2493 static void
2494 g_raid_fini(struct g_class *mp)
2495 {
2496
2497         if (g_raid_post_sync != NULL)
2498                 EVENTHANDLER_DEREGISTER(shutdown_post_sync, g_raid_post_sync);
2499         g_raid_started = 0;
2500 }
2501
2502 int
2503 g_raid_md_modevent(module_t mod, int type, void *arg)
2504 {
2505         struct g_raid_md_class *class, *c, *nc;
2506         int error;
2507
2508         error = 0;
2509         class = arg;
2510         switch (type) {
2511         case MOD_LOAD:
2512                 c = LIST_FIRST(&g_raid_md_classes);
2513                 if (c == NULL || c->mdc_priority > class->mdc_priority)
2514                         LIST_INSERT_HEAD(&g_raid_md_classes, class, mdc_list);
2515                 else {
2516                         while ((nc = LIST_NEXT(c, mdc_list)) != NULL &&
2517                             nc->mdc_priority < class->mdc_priority)
2518                                 c = nc;
2519                         LIST_INSERT_AFTER(c, class, mdc_list);
2520                 }
2521                 if (g_raid_started)
2522                         g_retaste(&g_raid_class);
2523                 break;
2524         case MOD_UNLOAD:
2525                 LIST_REMOVE(class, mdc_list);
2526                 break;
2527         default:
2528                 error = EOPNOTSUPP;
2529                 break;
2530         }
2531
2532         return (error);
2533 }
2534
2535 int
2536 g_raid_tr_modevent(module_t mod, int type, void *arg)
2537 {
2538         struct g_raid_tr_class *class, *c, *nc;
2539         int error;
2540
2541         error = 0;
2542         class = arg;
2543         switch (type) {
2544         case MOD_LOAD:
2545                 c = LIST_FIRST(&g_raid_tr_classes);
2546                 if (c == NULL || c->trc_priority > class->trc_priority)
2547                         LIST_INSERT_HEAD(&g_raid_tr_classes, class, trc_list);
2548                 else {
2549                         while ((nc = LIST_NEXT(c, trc_list)) != NULL &&
2550                             nc->trc_priority < class->trc_priority)
2551                                 c = nc;
2552                         LIST_INSERT_AFTER(c, class, trc_list);
2553                 }
2554                 break;
2555         case MOD_UNLOAD:
2556                 LIST_REMOVE(class, trc_list);
2557                 break;
2558         default:
2559                 error = EOPNOTSUPP;
2560                 break;
2561         }
2562
2563         return (error);
2564 }
2565
2566 /*
2567  * Use local implementation of DECLARE_GEOM_CLASS(g_raid_class, g_raid)
2568  * to reduce module priority, allowing submodules to register them first.
2569  */
2570 static moduledata_t g_raid_mod = {
2571         "g_raid",
2572         g_modevent,
2573         &g_raid_class
2574 };
2575 DECLARE_MODULE(g_raid, g_raid_mod, SI_SUB_DRIVERS, SI_ORDER_THIRD);
2576 MODULE_VERSION(geom_raid, 0);