g_raid3_ctl.c revision 156527
1/*- 2 * Copyright (c) 2004-2005 Pawel Jakub Dawidek <pjd@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sys/geom/raid3/g_raid3_ctl.c 156527 2006-03-10 07:41:31Z pjd $"); 29 30#include <sys/param.h> 31#include <sys/systm.h> 32#include <sys/kernel.h> 33#include <sys/module.h> 34#include <sys/lock.h> 35#include <sys/mutex.h> 36#include <sys/bio.h> 37#include <sys/sysctl.h> 38#include <sys/malloc.h> 39#include <sys/bitstring.h> 40#include <vm/uma.h> 41#include <machine/atomic.h> 42#include <geom/geom.h> 43#include <sys/proc.h> 44#include <sys/kthread.h> 45#include <geom/raid3/g_raid3.h> 46 47 48static struct g_raid3_softc * 49g_raid3_find_device(struct g_class *mp, const char *name) 50{ 51 struct g_raid3_softc *sc; 52 struct g_geom *gp; 53 54 g_topology_assert(); 55 LIST_FOREACH(gp, &mp->geom, geom) { 56 sc = gp->softc; 57 if (sc == NULL) 58 continue; 59 if ((sc->sc_flags & G_RAID3_DEVICE_FLAG_DESTROY) != 0) 60 continue; 61 if (strcmp(gp->name, name) == 0 || 62 strcmp(sc->sc_name, name) == 0) { 63 return (sc); 64 } 65 } 66 return (NULL); 67} 68 69static struct g_raid3_disk * 70g_raid3_find_disk(struct g_raid3_softc *sc, const char *name) 71{ 72 struct g_raid3_disk *disk; 73 u_int n; 74 75 g_topology_assert(); 76 for (n = 0; n < sc->sc_ndisks; n++) { 77 disk = &sc->sc_disks[n]; 78 if (disk->d_state == G_RAID3_DISK_STATE_NODISK) 79 continue; 80 if (disk->d_consumer == NULL) 81 continue; 82 if (disk->d_consumer->provider == NULL) 83 continue; 84 if (strcmp(disk->d_consumer->provider->name, name) == 0) 85 return (disk); 86 } 87 return (NULL); 88} 89 90static void 91g_raid3_ctl_configure(struct gctl_req *req, struct g_class *mp) 92{ 93 struct g_raid3_softc *sc; 94 struct g_raid3_disk *disk; 95 const char *name; 96 int *nargs, do_sync = 0; 97 int *autosync, *noautosync; 98 int *round_robin, *noround_robin; 99 int *verify, *noverify; 100 u_int n; 101 102 g_topology_assert(); 103 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 104 if (nargs == NULL) { 105 gctl_error(req, "No '%s' argument.", "nargs"); 106 return; 107 } 108 if (*nargs != 1) { 109 gctl_error(req, "Invalid number of arguments."); 110 return; 111 } 112 name = gctl_get_asciiparam(req, "arg0"); 113 if (name == NULL) { 114 gctl_error(req, "No 'arg%u' argument.", 0); 115 return; 116 } 117 sc = g_raid3_find_device(mp, name); 118 if (sc == NULL) { 119 gctl_error(req, "No such device: %s.", name); 120 return; 121 } 122 if (g_raid3_ndisks(sc, -1) < sc->sc_ndisks) { 123 gctl_error(req, "Not all disks connected."); 124 return; 125 } 126 autosync = gctl_get_paraml(req, "autosync", sizeof(*autosync)); 127 if (autosync == NULL) { 128 gctl_error(req, "No '%s' argument.", "autosync"); 129 return; 130 } 131 noautosync = gctl_get_paraml(req, "noautosync", sizeof(*noautosync)); 132 if (noautosync == NULL) { 133 gctl_error(req, "No '%s' argument.", "noautosync"); 134 return; 135 } 136 if (*autosync && *noautosync) { 137 gctl_error(req, "'%s' and '%s' specified.", "autosync", 138 "noautosync"); 139 return; 140 } 141 round_robin = gctl_get_paraml(req, "round_robin", sizeof(*round_robin)); 142 if (round_robin == NULL) { 143 gctl_error(req, "No '%s' argument.", "round_robin"); 144 return; 145 } 146 noround_robin = gctl_get_paraml(req, "noround_robin", 147 sizeof(*noround_robin)); 148 if (noround_robin == NULL) { 149 gctl_error(req, "No '%s' argument.", "noround_robin"); 150 return; 151 } 152 if (*round_robin && *noround_robin) { 153 gctl_error(req, "'%s' and '%s' specified.", "round_robin", 154 "noround_robin"); 155 return; 156 } 157 verify = gctl_get_paraml(req, "verify", sizeof(*verify)); 158 if (verify == NULL) { 159 gctl_error(req, "No '%s' argument.", "verify"); 160 return; 161 } 162 noverify = gctl_get_paraml(req, "noverify", sizeof(*noverify)); 163 if (noverify == NULL) { 164 gctl_error(req, "No '%s' argument.", "noverify"); 165 return; 166 } 167 if (*verify && *noverify) { 168 gctl_error(req, "'%s' and '%s' specified.", "verify", 169 "noverify"); 170 return; 171 } 172 if (!*autosync && !*noautosync && !*round_robin && !*noround_robin && 173 !*verify && !*noverify) { 174 gctl_error(req, "Nothing has changed."); 175 return; 176 } 177 if ((sc->sc_flags & G_RAID3_DEVICE_FLAG_NOAUTOSYNC) != 0) { 178 if (*autosync) { 179 sc->sc_flags &= ~G_RAID3_DEVICE_FLAG_NOAUTOSYNC; 180 do_sync = 1; 181 } 182 } else { 183 if (*noautosync) 184 sc->sc_flags |= G_RAID3_DEVICE_FLAG_NOAUTOSYNC; 185 } 186 if ((sc->sc_flags & G_RAID3_DEVICE_FLAG_VERIFY) != 0) { 187 if (*noverify) 188 sc->sc_flags &= ~G_RAID3_DEVICE_FLAG_VERIFY; 189 } else { 190 if (*verify) 191 sc->sc_flags |= G_RAID3_DEVICE_FLAG_VERIFY; 192 } 193 if ((sc->sc_flags & G_RAID3_DEVICE_FLAG_ROUND_ROBIN) != 0) { 194 if (*noround_robin) 195 sc->sc_flags &= ~G_RAID3_DEVICE_FLAG_ROUND_ROBIN; 196 } else { 197 if (*round_robin) 198 sc->sc_flags |= G_RAID3_DEVICE_FLAG_ROUND_ROBIN; 199 } 200 if ((sc->sc_flags & G_RAID3_DEVICE_FLAG_VERIFY) != 0 && 201 (sc->sc_flags & G_RAID3_DEVICE_FLAG_ROUND_ROBIN) != 0) { 202 /* 203 * VERIFY and ROUND-ROBIN options are mutally exclusive. 204 */ 205 sc->sc_flags &= ~G_RAID3_DEVICE_FLAG_ROUND_ROBIN; 206 } 207 for (n = 0; n < sc->sc_ndisks; n++) { 208 disk = &sc->sc_disks[n]; 209 if (do_sync) { 210 if (disk->d_state == G_RAID3_DISK_STATE_SYNCHRONIZING) 211 disk->d_flags &= ~G_RAID3_DISK_FLAG_FORCE_SYNC; 212 } 213 g_raid3_update_metadata(disk); 214 if (do_sync) { 215 if (disk->d_state == G_RAID3_DISK_STATE_STALE) { 216 /* 217 * XXX: This is probably possible that this 218 * component will not be retasted. 219 */ 220 g_raid3_event_send(disk, 221 G_RAID3_DISK_STATE_DISCONNECTED, 222 G_RAID3_EVENT_DONTWAIT); 223 } 224 } 225 } 226} 227 228static void 229g_raid3_ctl_rebuild(struct gctl_req *req, struct g_class *mp) 230{ 231 struct g_raid3_metadata md; 232 struct g_raid3_softc *sc; 233 struct g_raid3_disk *disk; 234 struct g_provider *pp; 235 const char *name; 236 int error, *nargs; 237 238 g_topology_assert(); 239 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 240 if (nargs == NULL) { 241 gctl_error(req, "No '%s' argument.", "nargs"); 242 return; 243 } 244 if (*nargs != 2) { 245 gctl_error(req, "Invalid number of arguments."); 246 return; 247 } 248 name = gctl_get_asciiparam(req, "arg0"); 249 if (name == NULL) { 250 gctl_error(req, "No 'arg%u' argument.", 0); 251 return; 252 } 253 sc = g_raid3_find_device(mp, name); 254 if (sc == NULL) { 255 gctl_error(req, "No such device: %s.", name); 256 return; 257 } 258 name = gctl_get_asciiparam(req, "arg1"); 259 if (name == NULL) { 260 gctl_error(req, "No 'arg%u' argument.", 1); 261 return; 262 } 263 disk = g_raid3_find_disk(sc, name); 264 if (disk == NULL) { 265 gctl_error(req, "No such provider: %s.", name); 266 return; 267 } 268 if (disk->d_state == G_RAID3_DISK_STATE_ACTIVE && 269 g_raid3_ndisks(sc, G_RAID3_DISK_STATE_ACTIVE) < sc->sc_ndisks) { 270 gctl_error(req, "There is one stale disk already.", name); 271 return; 272 } 273 /* 274 * Do rebuild by resetting syncid and disconnecting disk. 275 * It'll be retasted, connected to the device and synchronized. 276 */ 277 disk->d_sync.ds_syncid = 0; 278 if ((sc->sc_flags & G_RAID3_DEVICE_FLAG_NOAUTOSYNC) != 0) 279 disk->d_flags |= G_RAID3_DISK_FLAG_FORCE_SYNC; 280 g_raid3_update_metadata(disk); 281 pp = disk->d_consumer->provider; 282 error = g_raid3_read_metadata(disk->d_consumer, &md); 283 g_raid3_event_send(disk, G_RAID3_DISK_STATE_DISCONNECTED, 284 G_RAID3_EVENT_WAIT); 285 if (error != 0) { 286 gctl_error(req, "Cannot read metadata from %s.", pp->name); 287 return; 288 } 289 error = g_raid3_add_disk(sc, pp, &md); 290 if (error != 0) { 291 gctl_error(req, "Cannot reconnect component %s.", pp->name); 292 return; 293 } 294} 295 296static void 297g_raid3_ctl_stop(struct gctl_req *req, struct g_class *mp) 298{ 299 struct g_raid3_softc *sc; 300 int *force, *nargs, error; 301 const char *name; 302 char param[16]; 303 u_int i; 304 305 g_topology_assert(); 306 307 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 308 if (nargs == NULL) { 309 gctl_error(req, "No '%s' argument.", "nargs"); 310 return; 311 } 312 if (*nargs < 1) { 313 gctl_error(req, "Missing device(s)."); 314 return; 315 } 316 force = gctl_get_paraml(req, "force", sizeof(*force)); 317 if (force == NULL) { 318 gctl_error(req, "No '%s' argument.", "force"); 319 return; 320 } 321 322 for (i = 0; i < (u_int)*nargs; i++) { 323 snprintf(param, sizeof(param), "arg%u", i); 324 name = gctl_get_asciiparam(req, param); 325 if (name == NULL) { 326 gctl_error(req, "No 'arg%u' argument.", i); 327 return; 328 } 329 sc = g_raid3_find_device(mp, name); 330 if (sc == NULL) { 331 gctl_error(req, "No such device: %s.", name); 332 return; 333 } 334 error = g_raid3_destroy(sc, *force); 335 if (error != 0) { 336 gctl_error(req, "Cannot destroy device %s (error=%d).", 337 sc->sc_geom->name, error); 338 return; 339 } 340 } 341} 342 343static void 344g_raid3_ctl_insert_orphan(struct g_consumer *cp) 345{ 346 347 KASSERT(1 == 0, ("%s called while inserting %s.", __func__, 348 cp->provider->name)); 349} 350 351static void 352g_raid3_ctl_insert(struct gctl_req *req, struct g_class *mp) 353{ 354 struct g_raid3_metadata md; 355 struct g_raid3_softc *sc; 356 struct g_raid3_disk *disk; 357 struct g_geom *gp; 358 struct g_provider *pp; 359 struct g_consumer *cp; 360 const char *name; 361 u_char *sector; 362 off_t compsize; 363 intmax_t *no; 364 int *hardcode, *nargs, error; 365 366 g_topology_assert(); 367 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 368 if (nargs == NULL) { 369 gctl_error(req, "No '%s' argument.", "nargs"); 370 return; 371 } 372 if (*nargs != 2) { 373 gctl_error(req, "Invalid number of arguments."); 374 return; 375 } 376 name = gctl_get_asciiparam(req, "arg0"); 377 if (name == NULL) { 378 gctl_error(req, "No 'arg%u' argument.", 0); 379 return; 380 } 381 sc = g_raid3_find_device(mp, name); 382 if (sc == NULL) { 383 gctl_error(req, "No such device: %s.", name); 384 return; 385 } 386 no = gctl_get_paraml(req, "number", sizeof(*no)); 387 if (no == NULL) { 388 gctl_error(req, "No '%s' argument.", "no"); 389 return; 390 } 391 if (*no >= sc->sc_ndisks) { 392 gctl_error(req, "Invalid component number."); 393 return; 394 } 395 hardcode = gctl_get_paraml(req, "hardcode", sizeof(*hardcode)); 396 if (hardcode == NULL) { 397 gctl_error(req, "No '%s' argument.", "hardcode"); 398 return; 399 } 400 disk = &sc->sc_disks[*no]; 401 if (disk->d_state != G_RAID3_DISK_STATE_NODISK) { 402 gctl_error(req, "Component %u is already connected.", *no); 403 return; 404 } 405 name = gctl_get_asciiparam(req, "arg1"); 406 if (name == NULL) { 407 gctl_error(req, "No 'arg%u' argument.", 1); 408 return; 409 } 410 pp = g_provider_by_name(name); 411 if (pp == NULL) { 412 gctl_error(req, "Invalid provider."); 413 return; 414 } 415 if (((sc->sc_sectorsize / (sc->sc_ndisks - 1)) % pp->sectorsize) != 0) { 416 gctl_error(req, 417 "Cannot insert provider %s, because of its sector size.", 418 pp->name); 419 return; 420 } 421 compsize = sc->sc_mediasize / (sc->sc_ndisks - 1); 422 if (compsize > pp->mediasize - pp->sectorsize) { 423 gctl_error(req, "Provider %s too small.", pp->name); 424 return; 425 } 426 if (compsize < pp->mediasize - pp->sectorsize) { 427 gctl_error(req, 428 "warning: %s: only %jd bytes from %jd bytes used.", 429 pp->name, (intmax_t)compsize, 430 (intmax_t)(pp->mediasize - pp->sectorsize)); 431 } 432 gp = g_new_geomf(mp, "raid3:insert"); 433 gp->orphan = g_raid3_ctl_insert_orphan; 434 cp = g_new_consumer(gp); 435 error = g_attach(cp, pp); 436 if (error != 0) { 437 gctl_error(req, "Cannot attach to %s.", pp->name); 438 goto end; 439 } 440 error = g_access(cp, 0, 1, 1); 441 if (error != 0) { 442 gctl_error(req, "Cannot access %s.", pp->name); 443 goto end; 444 } 445 g_raid3_fill_metadata(disk, &md); 446 md.md_syncid = 0; 447 md.md_dflags = 0; 448 if (*hardcode) 449 strlcpy(md.md_provider, pp->name, sizeof(md.md_provider)); 450 else 451 bzero(md.md_provider, sizeof(md.md_provider)); 452 md.md_provsize = pp->mediasize; 453 sector = g_malloc(pp->sectorsize, M_WAITOK); 454 raid3_metadata_encode(&md, sector); 455 g_topology_unlock(); 456 error = g_write_data(cp, pp->mediasize - pp->sectorsize, sector, 457 pp->sectorsize); 458 g_topology_lock(); 459 g_free(sector); 460 if (error != 0) 461 gctl_error(req, "Cannot store metadata on %s.", pp->name); 462end: 463 if (cp->acw > 0) 464 g_access(cp, 0, -1, -1); 465 if (cp->provider != NULL) 466 g_detach(cp); 467 g_destroy_consumer(cp); 468 g_destroy_geom(gp); 469} 470 471static void 472g_raid3_ctl_remove(struct gctl_req *req, struct g_class *mp) 473{ 474 struct g_raid3_softc *sc; 475 struct g_raid3_disk *disk; 476 const char *name; 477 intmax_t *no; 478 int *nargs; 479 480 g_topology_assert(); 481 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 482 if (nargs == NULL) { 483 gctl_error(req, "No '%s' argument.", "nargs"); 484 return; 485 } 486 if (*nargs != 1) { 487 gctl_error(req, "Invalid number of arguments."); 488 return; 489 } 490 name = gctl_get_asciiparam(req, "arg0"); 491 if (name == NULL) { 492 gctl_error(req, "No 'arg%u' argument.", 0); 493 return; 494 } 495 sc = g_raid3_find_device(mp, name); 496 if (sc == NULL) { 497 gctl_error(req, "No such device: %s.", name); 498 return; 499 } 500 no = gctl_get_paraml(req, "number", sizeof(*no)); 501 if (no == NULL) { 502 gctl_error(req, "No '%s' argument.", "no"); 503 return; 504 } 505 if (*no >= sc->sc_ndisks) { 506 gctl_error(req, "Invalid component number."); 507 return; 508 } 509 disk = &sc->sc_disks[*no]; 510 switch (disk->d_state) { 511 case G_RAID3_DISK_STATE_ACTIVE: 512 /* 513 * When replacing ACTIVE component, all the rest has to be also 514 * ACTIVE. 515 */ 516 if (g_raid3_ndisks(sc, G_RAID3_DISK_STATE_ACTIVE) < 517 sc->sc_ndisks) { 518 gctl_error(req, "Cannot replace component number %u.", 519 *no); 520 return; 521 } 522 /* FALLTHROUGH */ 523 case G_RAID3_DISK_STATE_STALE: 524 case G_RAID3_DISK_STATE_SYNCHRONIZING: 525 if (g_raid3_clear_metadata(disk) != 0) { 526 gctl_error(req, "Cannot clear metadata on %s.", 527 g_raid3_get_diskname(disk)); 528 } else { 529 g_raid3_event_send(disk, 530 G_RAID3_DISK_STATE_DISCONNECTED, 531 G_RAID3_EVENT_WAIT); 532 } 533 break; 534 case G_RAID3_DISK_STATE_NODISK: 535 break; 536 default: 537 gctl_error(req, "Cannot replace component number %u.", *no); 538 return; 539 } 540} 541 542void 543g_raid3_config(struct gctl_req *req, struct g_class *mp, const char *verb) 544{ 545 uint32_t *version; 546 547 g_topology_assert(); 548 549 version = gctl_get_paraml(req, "version", sizeof(*version)); 550 if (version == NULL) { 551 gctl_error(req, "No '%s' argument.", "version"); 552 return; 553 } 554 if (*version != G_RAID3_VERSION) { 555 gctl_error(req, "Userland and kernel parts are out of sync."); 556 return; 557 } 558 559 if (strcmp(verb, "configure") == 0) 560 g_raid3_ctl_configure(req, mp); 561 else if (strcmp(verb, "insert") == 0) 562 g_raid3_ctl_insert(req, mp); 563 else if (strcmp(verb, "rebuild") == 0) 564 g_raid3_ctl_rebuild(req, mp); 565 else if (strcmp(verb, "remove") == 0) 566 g_raid3_ctl_remove(req, mp); 567 else if (strcmp(verb, "stop") == 0) 568 g_raid3_ctl_stop(req, mp); 569 else 570 gctl_error(req, "Unknown verb."); 571} 572