1132904Spjd/*- 2156878Spjd * Copyright (c) 2004-2006 Pawel Jakub Dawidek <pjd@FreeBSD.org> 3132904Spjd * All rights reserved. 4132904Spjd * 5132904Spjd * Redistribution and use in source and binary forms, with or without 6132904Spjd * modification, are permitted provided that the following conditions 7132904Spjd * are met: 8132904Spjd * 1. Redistributions of source code must retain the above copyright 9132904Spjd * notice, this list of conditions and the following disclaimer. 10132904Spjd * 2. Redistributions in binary form must reproduce the above copyright 11132904Spjd * notice, this list of conditions and the following disclaimer in the 12132904Spjd * documentation and/or other materials provided with the distribution. 13155174Spjd * 14132904Spjd * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 15132904Spjd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16132904Spjd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17132904Spjd * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 18132904Spjd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19132904Spjd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20132904Spjd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21132904Spjd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22132904Spjd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23132904Spjd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24132904Spjd * SUCH DAMAGE. 25132904Spjd */ 26132904Spjd 27132904Spjd#include <sys/cdefs.h> 28132904Spjd__FBSDID("$FreeBSD$"); 29132904Spjd 30132904Spjd#include <sys/param.h> 31132904Spjd#include <sys/systm.h> 32132904Spjd#include <sys/kernel.h> 33132904Spjd#include <sys/module.h> 34132904Spjd#include <sys/limits.h> 35132904Spjd#include <sys/lock.h> 36132904Spjd#include <sys/mutex.h> 37132904Spjd#include <sys/bio.h> 38223921Sae#include <sys/sbuf.h> 39132904Spjd#include <sys/sysctl.h> 40132904Spjd#include <sys/malloc.h> 41137254Spjd#include <sys/eventhandler.h> 42132904Spjd#include <vm/uma.h> 43132904Spjd#include <geom/geom.h> 44132904Spjd#include <sys/proc.h> 45132904Spjd#include <sys/kthread.h> 46139451Sjhb#include <sys/sched.h> 47132904Spjd#include <geom/mirror/g_mirror.h> 48132904Spjd 49219029SnetchildFEATURE(geom_mirror, "GEOM mirroring support"); 50132904Spjd 51151897Srwatsonstatic MALLOC_DEFINE(M_MIRROR, "mirror_data", "GEOM_MIRROR Data"); 52132904Spjd 53132904SpjdSYSCTL_DECL(_kern_geom); 54227309Sedstatic SYSCTL_NODE(_kern_geom, OID_AUTO, mirror, CTLFLAG_RW, 0, 55227309Sed "GEOM_MIRROR stuff"); 56132904Spjdu_int g_mirror_debug = 0; 57134528SpjdTUNABLE_INT("kern.geom.mirror.debug", &g_mirror_debug); 58132904SpjdSYSCTL_UINT(_kern_geom_mirror, OID_AUTO, debug, CTLFLAG_RW, &g_mirror_debug, 0, 59132904Spjd "Debug level"); 60135854Spjdstatic u_int g_mirror_timeout = 4; 61134226SpjdTUNABLE_INT("kern.geom.mirror.timeout", &g_mirror_timeout); 62132904SpjdSYSCTL_UINT(_kern_geom_mirror, OID_AUTO, timeout, CTLFLAG_RW, &g_mirror_timeout, 63132904Spjd 0, "Time to wait on all mirror components"); 64137251Spjdstatic u_int g_mirror_idletime = 5; 65137251SpjdTUNABLE_INT("kern.geom.mirror.idletime", &g_mirror_idletime); 66137251SpjdSYSCTL_UINT(_kern_geom_mirror, OID_AUTO, idletime, CTLFLAG_RW, 67137251Spjd &g_mirror_idletime, 0, "Mark components as clean when idling"); 68155545Spjdstatic u_int g_mirror_disconnect_on_failure = 1; 69155545SpjdTUNABLE_INT("kern.geom.mirror.disconnect_on_failure", 70155545Spjd &g_mirror_disconnect_on_failure); 71155545SpjdSYSCTL_UINT(_kern_geom_mirror, OID_AUTO, disconnect_on_failure, CTLFLAG_RW, 72155545Spjd &g_mirror_disconnect_on_failure, 0, "Disconnect component on I/O failure."); 73156873Spjdstatic u_int g_mirror_syncreqs = 2; 74156610SpjdTUNABLE_INT("kern.geom.mirror.sync_requests", &g_mirror_syncreqs); 75156610SpjdSYSCTL_UINT(_kern_geom_mirror, OID_AUTO, sync_requests, CTLFLAG_RDTUN, 76156610Spjd &g_mirror_syncreqs, 0, "Parallel synchronization I/O requests."); 77132904Spjd 78132904Spjd#define MSLEEP(ident, mtx, priority, wmesg, timeout) do { \ 79132904Spjd G_MIRROR_DEBUG(4, "%s: Sleeping %p.", __func__, (ident)); \ 80132904Spjd msleep((ident), (mtx), (priority), (wmesg), (timeout)); \ 81132904Spjd G_MIRROR_DEBUG(4, "%s: Woken up %p.", __func__, (ident)); \ 82132904Spjd} while (0) 83132904Spjd 84245443Smavstatic eventhandler_tag g_mirror_post_sync = NULL; 85245443Smavstatic int g_mirror_shutdown = 0; 86132904Spjd 87132904Spjdstatic int g_mirror_destroy_geom(struct gctl_req *req, struct g_class *mp, 88132904Spjd struct g_geom *gp); 89132904Spjdstatic g_taste_t g_mirror_taste; 90137254Spjdstatic void g_mirror_init(struct g_class *mp); 91137254Spjdstatic void g_mirror_fini(struct g_class *mp); 92132904Spjd 93132904Spjdstruct g_class g_mirror_class = { 94132904Spjd .name = G_MIRROR_CLASS_NAME, 95133318Sphk .version = G_VERSION, 96132904Spjd .ctlreq = g_mirror_config, 97132904Spjd .taste = g_mirror_taste, 98137254Spjd .destroy_geom = g_mirror_destroy_geom, 99137254Spjd .init = g_mirror_init, 100137254Spjd .fini = g_mirror_fini 101132904Spjd}; 102132904Spjd 103132904Spjd 104132904Spjdstatic void g_mirror_destroy_provider(struct g_mirror_softc *sc); 105139051Spjdstatic int g_mirror_update_disk(struct g_mirror_disk *disk, u_int state); 106139051Spjdstatic void g_mirror_update_device(struct g_mirror_softc *sc, boolean_t force); 107132904Spjdstatic void g_mirror_dumpconf(struct sbuf *sb, const char *indent, 108132904Spjd struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp); 109132904Spjdstatic void g_mirror_sync_stop(struct g_mirror_disk *disk, int type); 110156610Spjdstatic void g_mirror_register_request(struct bio *bp); 111156610Spjdstatic void g_mirror_sync_release(struct g_mirror_softc *sc); 112132904Spjd 113132904Spjd 114132904Spjdstatic const char * 115132904Spjdg_mirror_disk_state2str(int state) 116132904Spjd{ 117132904Spjd 118132904Spjd switch (state) { 119132904Spjd case G_MIRROR_DISK_STATE_NONE: 120132904Spjd return ("NONE"); 121132904Spjd case G_MIRROR_DISK_STATE_NEW: 122132904Spjd return ("NEW"); 123132904Spjd case G_MIRROR_DISK_STATE_ACTIVE: 124132904Spjd return ("ACTIVE"); 125132904Spjd case G_MIRROR_DISK_STATE_STALE: 126132904Spjd return ("STALE"); 127132904Spjd case G_MIRROR_DISK_STATE_SYNCHRONIZING: 128132904Spjd return ("SYNCHRONIZING"); 129132904Spjd case G_MIRROR_DISK_STATE_DISCONNECTED: 130132904Spjd return ("DISCONNECTED"); 131132904Spjd case G_MIRROR_DISK_STATE_DESTROY: 132132904Spjd return ("DESTROY"); 133132904Spjd default: 134132904Spjd return ("INVALID"); 135132904Spjd } 136132904Spjd} 137132904Spjd 138132904Spjdstatic const char * 139132904Spjdg_mirror_device_state2str(int state) 140132904Spjd{ 141132904Spjd 142132904Spjd switch (state) { 143132904Spjd case G_MIRROR_DEVICE_STATE_STARTING: 144132904Spjd return ("STARTING"); 145132904Spjd case G_MIRROR_DEVICE_STATE_RUNNING: 146132904Spjd return ("RUNNING"); 147132904Spjd default: 148132904Spjd return ("INVALID"); 149132904Spjd } 150132904Spjd} 151132904Spjd 152132904Spjdstatic const char * 153132904Spjdg_mirror_get_diskname(struct g_mirror_disk *disk) 154132904Spjd{ 155132904Spjd 156132904Spjd if (disk->d_consumer == NULL || disk->d_consumer->provider == NULL) 157132904Spjd return ("[unknown]"); 158132904Spjd return (disk->d_name); 159132904Spjd} 160132904Spjd 161132904Spjd/* 162132904Spjd * --- Events handling functions --- 163132904Spjd * Events in geom_mirror are used to maintain disks and device status 164132904Spjd * from one thread to simplify locking. 165132904Spjd */ 166132904Spjdstatic void 167132904Spjdg_mirror_event_free(struct g_mirror_event *ep) 168132904Spjd{ 169132904Spjd 170132904Spjd free(ep, M_MIRROR); 171132904Spjd} 172132904Spjd 173132904Spjdint 174132904Spjdg_mirror_event_send(void *arg, int state, int flags) 175132904Spjd{ 176132904Spjd struct g_mirror_softc *sc; 177132904Spjd struct g_mirror_disk *disk; 178132904Spjd struct g_mirror_event *ep; 179132904Spjd int error; 180132904Spjd 181132904Spjd ep = malloc(sizeof(*ep), M_MIRROR, M_WAITOK); 182132904Spjd G_MIRROR_DEBUG(4, "%s: Sending event %p.", __func__, ep); 183132904Spjd if ((flags & G_MIRROR_EVENT_DEVICE) != 0) { 184132904Spjd disk = NULL; 185132904Spjd sc = arg; 186132904Spjd } else { 187132904Spjd disk = arg; 188132904Spjd sc = disk->d_softc; 189132904Spjd } 190132904Spjd ep->e_disk = disk; 191132904Spjd ep->e_state = state; 192132904Spjd ep->e_flags = flags; 193132904Spjd ep->e_error = 0; 194132904Spjd mtx_lock(&sc->sc_events_mtx); 195132904Spjd TAILQ_INSERT_TAIL(&sc->sc_events, ep, e_next); 196132904Spjd mtx_unlock(&sc->sc_events_mtx); 197132904Spjd G_MIRROR_DEBUG(4, "%s: Waking up %p.", __func__, sc); 198132904Spjd mtx_lock(&sc->sc_queue_mtx); 199132904Spjd wakeup(sc); 200132904Spjd mtx_unlock(&sc->sc_queue_mtx); 201132904Spjd if ((flags & G_MIRROR_EVENT_DONTWAIT) != 0) 202132904Spjd return (0); 203156610Spjd sx_assert(&sc->sc_lock, SX_XLOCKED); 204132904Spjd G_MIRROR_DEBUG(4, "%s: Sleeping %p.", __func__, ep); 205156610Spjd sx_xunlock(&sc->sc_lock); 206132904Spjd while ((ep->e_flags & G_MIRROR_EVENT_DONE) == 0) { 207132904Spjd mtx_lock(&sc->sc_events_mtx); 208132904Spjd MSLEEP(ep, &sc->sc_events_mtx, PRIBIO | PDROP, "m:event", 209132904Spjd hz * 5); 210132904Spjd } 211132904Spjd error = ep->e_error; 212132904Spjd g_mirror_event_free(ep); 213156610Spjd sx_xlock(&sc->sc_lock); 214132904Spjd return (error); 215132904Spjd} 216132904Spjd 217132904Spjdstatic struct g_mirror_event * 218132904Spjdg_mirror_event_get(struct g_mirror_softc *sc) 219132904Spjd{ 220132904Spjd struct g_mirror_event *ep; 221132904Spjd 222132904Spjd mtx_lock(&sc->sc_events_mtx); 223132904Spjd ep = TAILQ_FIRST(&sc->sc_events); 224132904Spjd mtx_unlock(&sc->sc_events_mtx); 225132904Spjd return (ep); 226132904Spjd} 227132904Spjd 228132904Spjdstatic void 229139140Spjdg_mirror_event_remove(struct g_mirror_softc *sc, struct g_mirror_event *ep) 230139140Spjd{ 231139140Spjd 232139140Spjd mtx_lock(&sc->sc_events_mtx); 233139140Spjd TAILQ_REMOVE(&sc->sc_events, ep, e_next); 234139140Spjd mtx_unlock(&sc->sc_events_mtx); 235139140Spjd} 236139140Spjd 237139140Spjdstatic void 238132904Spjdg_mirror_event_cancel(struct g_mirror_disk *disk) 239132904Spjd{ 240132904Spjd struct g_mirror_softc *sc; 241132904Spjd struct g_mirror_event *ep, *tmpep; 242132904Spjd 243156610Spjd sc = disk->d_softc; 244156610Spjd sx_assert(&sc->sc_lock, SX_XLOCKED); 245132904Spjd 246132904Spjd mtx_lock(&sc->sc_events_mtx); 247132904Spjd TAILQ_FOREACH_SAFE(ep, &sc->sc_events, e_next, tmpep) { 248132904Spjd if ((ep->e_flags & G_MIRROR_EVENT_DEVICE) != 0) 249132904Spjd continue; 250132904Spjd if (ep->e_disk != disk) 251132904Spjd continue; 252132904Spjd TAILQ_REMOVE(&sc->sc_events, ep, e_next); 253132904Spjd if ((ep->e_flags & G_MIRROR_EVENT_DONTWAIT) != 0) 254132904Spjd g_mirror_event_free(ep); 255132904Spjd else { 256132904Spjd ep->e_error = ECANCELED; 257132904Spjd wakeup(ep); 258132904Spjd } 259132904Spjd } 260132904Spjd mtx_unlock(&sc->sc_events_mtx); 261132904Spjd} 262132904Spjd 263132904Spjd/* 264132904Spjd * Return the number of disks in given state. 265132904Spjd * If state is equal to -1, count all connected disks. 266132904Spjd */ 267132904Spjdu_int 268132904Spjdg_mirror_ndisks(struct g_mirror_softc *sc, int state) 269132904Spjd{ 270132904Spjd struct g_mirror_disk *disk; 271132904Spjd u_int n = 0; 272132904Spjd 273156610Spjd sx_assert(&sc->sc_lock, SX_LOCKED); 274156610Spjd 275132904Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 276132904Spjd if (state == -1 || disk->d_state == state) 277132904Spjd n++; 278132904Spjd } 279132904Spjd return (n); 280132904Spjd} 281132904Spjd 282132904Spjd/* 283132904Spjd * Find a disk in mirror by its disk ID. 284132904Spjd */ 285132904Spjdstatic struct g_mirror_disk * 286132904Spjdg_mirror_id2disk(struct g_mirror_softc *sc, uint32_t id) 287132904Spjd{ 288132904Spjd struct g_mirror_disk *disk; 289132904Spjd 290156610Spjd sx_assert(&sc->sc_lock, SX_XLOCKED); 291132904Spjd 292132904Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 293132904Spjd if (disk->d_id == id) 294132904Spjd return (disk); 295132904Spjd } 296132904Spjd return (NULL); 297132904Spjd} 298132904Spjd 299132904Spjdstatic u_int 300132904Spjdg_mirror_nrequests(struct g_mirror_softc *sc, struct g_consumer *cp) 301132904Spjd{ 302132904Spjd struct bio *bp; 303132904Spjd u_int nreqs = 0; 304132904Spjd 305132904Spjd mtx_lock(&sc->sc_queue_mtx); 306132904Spjd TAILQ_FOREACH(bp, &sc->sc_queue.queue, bio_queue) { 307132904Spjd if (bp->bio_from == cp) 308132904Spjd nreqs++; 309132904Spjd } 310132904Spjd mtx_unlock(&sc->sc_queue_mtx); 311132904Spjd return (nreqs); 312132904Spjd} 313132904Spjd 314133484Spjdstatic int 315133484Spjdg_mirror_is_busy(struct g_mirror_softc *sc, struct g_consumer *cp) 316132904Spjd{ 317132904Spjd 318137248Spjd if (cp->index > 0) { 319132904Spjd G_MIRROR_DEBUG(2, 320132904Spjd "I/O requests for %s exist, can't destroy it now.", 321132904Spjd cp->provider->name); 322133484Spjd return (1); 323132904Spjd } 324132904Spjd if (g_mirror_nrequests(sc, cp) > 0) { 325132904Spjd G_MIRROR_DEBUG(2, 326132904Spjd "I/O requests for %s in queue, can't destroy it now.", 327132904Spjd cp->provider->name); 328133484Spjd return (1); 329133484Spjd } 330133484Spjd return (0); 331133484Spjd} 332133484Spjd 333133484Spjdstatic void 334139053Spjdg_mirror_destroy_consumer(void *arg, int flags __unused) 335139051Spjd{ 336139051Spjd struct g_consumer *cp; 337139051Spjd 338156610Spjd g_topology_assert(); 339156610Spjd 340139051Spjd cp = arg; 341139051Spjd G_MIRROR_DEBUG(1, "Consumer %s destroyed.", cp->provider->name); 342139051Spjd g_detach(cp); 343139051Spjd g_destroy_consumer(cp); 344139051Spjd} 345139051Spjd 346139051Spjdstatic void 347133484Spjdg_mirror_kill_consumer(struct g_mirror_softc *sc, struct g_consumer *cp) 348133484Spjd{ 349139051Spjd struct g_provider *pp; 350139051Spjd int retaste_wait; 351133484Spjd 352133484Spjd g_topology_assert(); 353133484Spjd 354133484Spjd cp->private = NULL; 355133484Spjd if (g_mirror_is_busy(sc, cp)) 356132904Spjd return; 357139051Spjd pp = cp->provider; 358139051Spjd retaste_wait = 0; 359139051Spjd if (cp->acw == 1) { 360139051Spjd if ((pp->geom->flags & G_GEOM_WITHER) == 0) 361139051Spjd retaste_wait = 1; 362139051Spjd } 363139051Spjd G_MIRROR_DEBUG(2, "Access %s r%dw%de%d = %d", pp->name, -cp->acr, 364139051Spjd -cp->acw, -cp->ace, 0); 365139053Spjd if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0) 366139053Spjd g_access(cp, -cp->acr, -cp->acw, -cp->ace); 367139051Spjd if (retaste_wait) { 368139051Spjd /* 369139051Spjd * After retaste event was send (inside g_access()), we can send 370139051Spjd * event to detach and destroy consumer. 371139051Spjd * A class, which has consumer to the given provider connected 372139051Spjd * will not receive retaste event for the provider. 373139051Spjd * This is the way how I ignore retaste events when I close 374139051Spjd * consumers opened for write: I detach and destroy consumer 375139051Spjd * after retaste event is sent. 376139051Spjd */ 377139051Spjd g_post_event(g_mirror_destroy_consumer, cp, M_WAITOK, NULL); 378139051Spjd return; 379139051Spjd } 380139051Spjd G_MIRROR_DEBUG(1, "Consumer %s destroyed.", pp->name); 381132904Spjd g_detach(cp); 382132904Spjd g_destroy_consumer(cp); 383132904Spjd} 384132904Spjd 385132904Spjdstatic int 386132904Spjdg_mirror_connect_disk(struct g_mirror_disk *disk, struct g_provider *pp) 387132904Spjd{ 388144143Spjd struct g_consumer *cp; 389132904Spjd int error; 390132904Spjd 391156610Spjd g_topology_assert_not(); 392132904Spjd KASSERT(disk->d_consumer == NULL, 393132904Spjd ("Disk already connected (device %s).", disk->d_softc->sc_name)); 394132904Spjd 395156610Spjd g_topology_lock(); 396144143Spjd cp = g_new_consumer(disk->d_softc->sc_geom); 397144143Spjd error = g_attach(cp, pp); 398144143Spjd if (error != 0) { 399144143Spjd g_destroy_consumer(cp); 400156610Spjd g_topology_unlock(); 401132904Spjd return (error); 402144143Spjd } 403144143Spjd error = g_access(cp, 1, 1, 1); 404139051Spjd if (error != 0) { 405144143Spjd g_detach(cp); 406144143Spjd g_destroy_consumer(cp); 407156610Spjd g_topology_unlock(); 408139051Spjd G_MIRROR_DEBUG(0, "Cannot open consumer %s (error=%d).", 409139051Spjd pp->name, error); 410139051Spjd return (error); 411139051Spjd } 412156610Spjd g_topology_unlock(); 413144143Spjd disk->d_consumer = cp; 414144143Spjd disk->d_consumer->private = disk; 415144143Spjd disk->d_consumer->index = 0; 416139051Spjd 417132904Spjd G_MIRROR_DEBUG(2, "Disk %s connected.", g_mirror_get_diskname(disk)); 418132904Spjd return (0); 419132904Spjd} 420132904Spjd 421132904Spjdstatic void 422133484Spjdg_mirror_disconnect_consumer(struct g_mirror_softc *sc, struct g_consumer *cp) 423132904Spjd{ 424132904Spjd 425132904Spjd g_topology_assert(); 426132904Spjd 427132904Spjd if (cp == NULL) 428132904Spjd return; 429139051Spjd if (cp->provider != NULL) 430133484Spjd g_mirror_kill_consumer(sc, cp); 431139051Spjd else 432132904Spjd g_destroy_consumer(cp); 433132904Spjd} 434132904Spjd 435132904Spjd/* 436132904Spjd * Initialize disk. This means allocate memory, create consumer, attach it 437132904Spjd * to the provider and open access (r1w1e1) to it. 438132904Spjd */ 439132904Spjdstatic struct g_mirror_disk * 440132904Spjdg_mirror_init_disk(struct g_mirror_softc *sc, struct g_provider *pp, 441132904Spjd struct g_mirror_metadata *md, int *errorp) 442132904Spjd{ 443132904Spjd struct g_mirror_disk *disk; 444237930Sglebius int i, error; 445132904Spjd 446132904Spjd disk = malloc(sizeof(*disk), M_MIRROR, M_NOWAIT | M_ZERO); 447132904Spjd if (disk == NULL) { 448132904Spjd error = ENOMEM; 449132904Spjd goto fail; 450132904Spjd } 451132904Spjd disk->d_softc = sc; 452132904Spjd error = g_mirror_connect_disk(disk, pp); 453132904Spjd if (error != 0) 454132904Spjd goto fail; 455132904Spjd disk->d_id = md->md_did; 456132904Spjd disk->d_state = G_MIRROR_DISK_STATE_NONE; 457132904Spjd disk->d_priority = md->md_priority; 458132904Spjd disk->d_flags = md->md_dflags; 459237930Sglebius error = g_getattr("GEOM::candelete", disk->d_consumer, &i); 460245946Savg if (error == 0 && i != 0) 461237930Sglebius disk->d_flags |= G_MIRROR_DISK_FLAG_CANDELETE; 462133373Spjd if (md->md_provider[0] != '\0') 463133373Spjd disk->d_flags |= G_MIRROR_DISK_FLAG_HARDCODED; 464132904Spjd disk->d_sync.ds_consumer = NULL; 465132904Spjd disk->d_sync.ds_offset = md->md_sync_offset; 466132904Spjd disk->d_sync.ds_offset_done = md->md_sync_offset; 467139213Spjd disk->d_genid = md->md_genid; 468132904Spjd disk->d_sync.ds_syncid = md->md_syncid; 469132904Spjd if (errorp != NULL) 470132904Spjd *errorp = 0; 471132904Spjd return (disk); 472132904Spjdfail: 473132904Spjd if (errorp != NULL) 474132904Spjd *errorp = error; 475144143Spjd if (disk != NULL) 476132904Spjd free(disk, M_MIRROR); 477132904Spjd return (NULL); 478132904Spjd} 479132904Spjd 480132904Spjdstatic void 481132904Spjdg_mirror_destroy_disk(struct g_mirror_disk *disk) 482132904Spjd{ 483132904Spjd struct g_mirror_softc *sc; 484132904Spjd 485156610Spjd g_topology_assert_not(); 486156610Spjd sc = disk->d_softc; 487156610Spjd sx_assert(&sc->sc_lock, SX_XLOCKED); 488132904Spjd 489132904Spjd LIST_REMOVE(disk, d_next); 490132904Spjd g_mirror_event_cancel(disk); 491132904Spjd if (sc->sc_hint == disk) 492132904Spjd sc->sc_hint = NULL; 493132904Spjd switch (disk->d_state) { 494132904Spjd case G_MIRROR_DISK_STATE_SYNCHRONIZING: 495132904Spjd g_mirror_sync_stop(disk, 1); 496132904Spjd /* FALLTHROUGH */ 497132904Spjd case G_MIRROR_DISK_STATE_NEW: 498132904Spjd case G_MIRROR_DISK_STATE_STALE: 499132904Spjd case G_MIRROR_DISK_STATE_ACTIVE: 500156610Spjd g_topology_lock(); 501133484Spjd g_mirror_disconnect_consumer(sc, disk->d_consumer); 502156610Spjd g_topology_unlock(); 503133114Spjd free(disk, M_MIRROR); 504132904Spjd break; 505132904Spjd default: 506132904Spjd KASSERT(0 == 1, ("Wrong disk state (%s, %s).", 507132904Spjd g_mirror_get_diskname(disk), 508132904Spjd g_mirror_disk_state2str(disk->d_state))); 509132904Spjd } 510132904Spjd} 511132904Spjd 512132904Spjdstatic void 513132904Spjdg_mirror_destroy_device(struct g_mirror_softc *sc) 514132904Spjd{ 515132904Spjd struct g_mirror_disk *disk; 516132904Spjd struct g_mirror_event *ep; 517132904Spjd struct g_geom *gp; 518133484Spjd struct g_consumer *cp, *tmpcp; 519132904Spjd 520156610Spjd g_topology_assert_not(); 521156610Spjd sx_assert(&sc->sc_lock, SX_XLOCKED); 522132904Spjd 523132904Spjd gp = sc->sc_geom; 524132904Spjd if (sc->sc_provider != NULL) 525132904Spjd g_mirror_destroy_provider(sc); 526132904Spjd for (disk = LIST_FIRST(&sc->sc_disks); disk != NULL; 527132904Spjd disk = LIST_FIRST(&sc->sc_disks)) { 528137254Spjd disk->d_flags &= ~G_MIRROR_DISK_FLAG_DIRTY; 529137254Spjd g_mirror_update_metadata(disk); 530132904Spjd g_mirror_destroy_disk(disk); 531132904Spjd } 532132904Spjd while ((ep = g_mirror_event_get(sc)) != NULL) { 533139140Spjd g_mirror_event_remove(sc, ep); 534132904Spjd if ((ep->e_flags & G_MIRROR_EVENT_DONTWAIT) != 0) 535132904Spjd g_mirror_event_free(ep); 536132904Spjd else { 537132904Spjd ep->e_error = ECANCELED; 538132904Spjd ep->e_flags |= G_MIRROR_EVENT_DONE; 539132904Spjd G_MIRROR_DEBUG(4, "%s: Waking up %p.", __func__, ep); 540132904Spjd mtx_lock(&sc->sc_events_mtx); 541132904Spjd wakeup(ep); 542132904Spjd mtx_unlock(&sc->sc_events_mtx); 543132904Spjd } 544132904Spjd } 545132904Spjd callout_drain(&sc->sc_callout); 546133484Spjd 547156610Spjd g_topology_lock(); 548133484Spjd LIST_FOREACH_SAFE(cp, &sc->sc_sync.ds_geom->consumer, consumer, tmpcp) { 549133484Spjd g_mirror_disconnect_consumer(sc, cp); 550132922Spjd } 551133484Spjd g_wither_geom(sc->sc_sync.ds_geom, ENXIO); 552156610Spjd G_MIRROR_DEBUG(0, "Device %s destroyed.", gp->name); 553156610Spjd g_wither_geom(gp, ENXIO); 554156610Spjd g_topology_unlock(); 555132904Spjd mtx_destroy(&sc->sc_queue_mtx); 556132904Spjd mtx_destroy(&sc->sc_events_mtx); 557156610Spjd sx_xunlock(&sc->sc_lock); 558156610Spjd sx_destroy(&sc->sc_lock); 559132904Spjd} 560132904Spjd 561132904Spjdstatic void 562132904Spjdg_mirror_orphan(struct g_consumer *cp) 563132904Spjd{ 564132904Spjd struct g_mirror_disk *disk; 565132904Spjd 566132904Spjd g_topology_assert(); 567132904Spjd 568132904Spjd disk = cp->private; 569132904Spjd if (disk == NULL) 570132904Spjd return; 571139670Spjd disk->d_softc->sc_bump_id |= G_MIRROR_BUMP_SYNCID; 572132904Spjd g_mirror_event_send(disk, G_MIRROR_DISK_STATE_DISCONNECTED, 573132904Spjd G_MIRROR_EVENT_DONTWAIT); 574132904Spjd} 575132904Spjd 576132904Spjd/* 577132904Spjd * Function should return the next active disk on the list. 578132904Spjd * It is possible that it will be the same disk as given. 579132904Spjd * If there are no active disks on list, NULL is returned. 580132904Spjd */ 581132904Spjdstatic __inline struct g_mirror_disk * 582132904Spjdg_mirror_find_next(struct g_mirror_softc *sc, struct g_mirror_disk *disk) 583132904Spjd{ 584132904Spjd struct g_mirror_disk *dp; 585132904Spjd 586132904Spjd for (dp = LIST_NEXT(disk, d_next); dp != disk; 587132904Spjd dp = LIST_NEXT(dp, d_next)) { 588132904Spjd if (dp == NULL) 589132904Spjd dp = LIST_FIRST(&sc->sc_disks); 590132904Spjd if (dp->d_state == G_MIRROR_DISK_STATE_ACTIVE) 591132904Spjd break; 592132904Spjd } 593132904Spjd if (dp->d_state != G_MIRROR_DISK_STATE_ACTIVE) 594132904Spjd return (NULL); 595132904Spjd return (dp); 596132904Spjd} 597132904Spjd 598132904Spjdstatic struct g_mirror_disk * 599132904Spjdg_mirror_get_disk(struct g_mirror_softc *sc) 600132904Spjd{ 601132904Spjd struct g_mirror_disk *disk; 602132904Spjd 603132904Spjd if (sc->sc_hint == NULL) { 604132904Spjd sc->sc_hint = LIST_FIRST(&sc->sc_disks); 605132904Spjd if (sc->sc_hint == NULL) 606132904Spjd return (NULL); 607132904Spjd } 608132904Spjd disk = sc->sc_hint; 609132904Spjd if (disk->d_state != G_MIRROR_DISK_STATE_ACTIVE) { 610132904Spjd disk = g_mirror_find_next(sc, disk); 611132904Spjd if (disk == NULL) 612132904Spjd return (NULL); 613132904Spjd } 614132904Spjd sc->sc_hint = g_mirror_find_next(sc, disk); 615132904Spjd return (disk); 616132904Spjd} 617132904Spjd 618132904Spjdstatic int 619133752Spjdg_mirror_write_metadata(struct g_mirror_disk *disk, 620133752Spjd struct g_mirror_metadata *md) 621132904Spjd{ 622132904Spjd struct g_mirror_softc *sc; 623132904Spjd struct g_consumer *cp; 624132904Spjd off_t offset, length; 625132904Spjd u_char *sector; 626139051Spjd int error = 0; 627132904Spjd 628156610Spjd g_topology_assert_not(); 629156610Spjd sc = disk->d_softc; 630156610Spjd sx_assert(&sc->sc_lock, SX_LOCKED); 631132904Spjd 632132904Spjd cp = disk->d_consumer; 633132904Spjd KASSERT(cp != NULL, ("NULL consumer (%s).", sc->sc_name)); 634132904Spjd KASSERT(cp->provider != NULL, ("NULL provider (%s).", sc->sc_name)); 635156610Spjd KASSERT(cp->acr >= 1 && cp->acw >= 1 && cp->ace >= 1, 636139051Spjd ("Consumer %s closed? (r%dw%de%d).", cp->provider->name, cp->acr, 637139051Spjd cp->acw, cp->ace)); 638132904Spjd length = cp->provider->sectorsize; 639132904Spjd offset = cp->provider->mediasize - length; 640132904Spjd sector = malloc((size_t)length, M_MIRROR, M_WAITOK | M_ZERO); 641139051Spjd if (md != NULL) 642139051Spjd mirror_metadata_encode(md, sector); 643139051Spjd error = g_write_data(cp, offset, sector, length); 644132904Spjd free(sector, M_MIRROR); 645132904Spjd if (error != 0) { 646155545Spjd if ((disk->d_flags & G_MIRROR_DISK_FLAG_BROKEN) == 0) { 647155545Spjd disk->d_flags |= G_MIRROR_DISK_FLAG_BROKEN; 648155545Spjd G_MIRROR_DEBUG(0, "Cannot write metadata on %s " 649155545Spjd "(device=%s, error=%d).", 650155545Spjd g_mirror_get_diskname(disk), sc->sc_name, error); 651155545Spjd } else { 652155545Spjd G_MIRROR_DEBUG(1, "Cannot write metadata on %s " 653155545Spjd "(device=%s, error=%d).", 654155545Spjd g_mirror_get_diskname(disk), sc->sc_name, error); 655155545Spjd } 656155545Spjd if (g_mirror_disconnect_on_failure && 657155545Spjd g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_ACTIVE) > 1) { 658155545Spjd sc->sc_bump_id |= G_MIRROR_BUMP_GENID; 659155545Spjd g_mirror_event_send(disk, 660155545Spjd G_MIRROR_DISK_STATE_DISCONNECTED, 661155545Spjd G_MIRROR_EVENT_DONTWAIT); 662155545Spjd } 663132904Spjd } 664133752Spjd return (error); 665132904Spjd} 666132904Spjd 667133752Spjdstatic int 668133752Spjdg_mirror_clear_metadata(struct g_mirror_disk *disk) 669133752Spjd{ 670133752Spjd int error; 671133752Spjd 672156610Spjd g_topology_assert_not(); 673156610Spjd sx_assert(&disk->d_softc->sc_lock, SX_LOCKED); 674156610Spjd 675133752Spjd error = g_mirror_write_metadata(disk, NULL); 676133752Spjd if (error == 0) { 677133752Spjd G_MIRROR_DEBUG(2, "Metadata on %s cleared.", 678133752Spjd g_mirror_get_diskname(disk)); 679133752Spjd } else { 680133752Spjd G_MIRROR_DEBUG(0, 681133752Spjd "Cannot clear metadata on disk %s (error=%d).", 682133752Spjd g_mirror_get_diskname(disk), error); 683133752Spjd } 684133752Spjd return (error); 685133752Spjd} 686133752Spjd 687132904Spjdvoid 688132904Spjdg_mirror_fill_metadata(struct g_mirror_softc *sc, struct g_mirror_disk *disk, 689132904Spjd struct g_mirror_metadata *md) 690132904Spjd{ 691132904Spjd 692132904Spjd strlcpy(md->md_magic, G_MIRROR_MAGIC, sizeof(md->md_magic)); 693132904Spjd md->md_version = G_MIRROR_VERSION; 694132904Spjd strlcpy(md->md_name, sc->sc_name, sizeof(md->md_name)); 695132904Spjd md->md_mid = sc->sc_id; 696132904Spjd md->md_all = sc->sc_ndisks; 697132904Spjd md->md_slice = sc->sc_slice; 698132904Spjd md->md_balance = sc->sc_balance; 699139213Spjd md->md_genid = sc->sc_genid; 700132904Spjd md->md_mediasize = sc->sc_mediasize; 701132904Spjd md->md_sectorsize = sc->sc_sectorsize; 702132904Spjd md->md_mflags = (sc->sc_flags & G_MIRROR_DEVICE_FLAG_MASK); 703133373Spjd bzero(md->md_provider, sizeof(md->md_provider)); 704132904Spjd if (disk == NULL) { 705132904Spjd md->md_did = arc4random(); 706132904Spjd md->md_priority = 0; 707132904Spjd md->md_syncid = 0; 708132904Spjd md->md_dflags = 0; 709132904Spjd md->md_sync_offset = 0; 710142727Spjd md->md_provsize = 0; 711132904Spjd } else { 712132904Spjd md->md_did = disk->d_id; 713132904Spjd md->md_priority = disk->d_priority; 714132904Spjd md->md_syncid = disk->d_sync.ds_syncid; 715132904Spjd md->md_dflags = (disk->d_flags & G_MIRROR_DISK_FLAG_MASK); 716132904Spjd if (disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING) 717132904Spjd md->md_sync_offset = disk->d_sync.ds_offset_done; 718132904Spjd else 719132904Spjd md->md_sync_offset = 0; 720133373Spjd if ((disk->d_flags & G_MIRROR_DISK_FLAG_HARDCODED) != 0) { 721133373Spjd strlcpy(md->md_provider, 722133373Spjd disk->d_consumer->provider->name, 723133373Spjd sizeof(md->md_provider)); 724133373Spjd } 725142727Spjd md->md_provsize = disk->d_consumer->provider->mediasize; 726132904Spjd } 727132904Spjd} 728132904Spjd 729132904Spjdvoid 730132904Spjdg_mirror_update_metadata(struct g_mirror_disk *disk) 731132904Spjd{ 732156610Spjd struct g_mirror_softc *sc; 733132904Spjd struct g_mirror_metadata md; 734133752Spjd int error; 735132904Spjd 736156610Spjd g_topology_assert_not(); 737156610Spjd sc = disk->d_softc; 738156610Spjd sx_assert(&sc->sc_lock, SX_LOCKED); 739156610Spjd 740156610Spjd g_mirror_fill_metadata(sc, disk, &md); 741133752Spjd error = g_mirror_write_metadata(disk, &md); 742133752Spjd if (error == 0) { 743133752Spjd G_MIRROR_DEBUG(2, "Metadata on %s updated.", 744133752Spjd g_mirror_get_diskname(disk)); 745132904Spjd } else { 746132904Spjd G_MIRROR_DEBUG(0, 747132904Spjd "Cannot update metadata on disk %s (error=%d).", 748132904Spjd g_mirror_get_diskname(disk), error); 749132904Spjd } 750132904Spjd} 751132904Spjd 752132904Spjdstatic void 753139051Spjdg_mirror_bump_syncid(struct g_mirror_softc *sc) 754132904Spjd{ 755132904Spjd struct g_mirror_disk *disk; 756132904Spjd 757156610Spjd g_topology_assert_not(); 758156610Spjd sx_assert(&sc->sc_lock, SX_XLOCKED); 759132904Spjd KASSERT(g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_ACTIVE) > 0, 760132904Spjd ("%s called with no active disks (device=%s).", __func__, 761132904Spjd sc->sc_name)); 762132904Spjd 763132904Spjd sc->sc_syncid++; 764132954Spjd G_MIRROR_DEBUG(1, "Device %s: syncid bumped to %u.", sc->sc_name, 765132954Spjd sc->sc_syncid); 766132904Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 767132904Spjd if (disk->d_state == G_MIRROR_DISK_STATE_ACTIVE || 768132904Spjd disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING) { 769132904Spjd disk->d_sync.ds_syncid = sc->sc_syncid; 770132904Spjd g_mirror_update_metadata(disk); 771132904Spjd } 772132904Spjd } 773132904Spjd} 774132904Spjd 775137248Spjdstatic void 776139213Spjdg_mirror_bump_genid(struct g_mirror_softc *sc) 777139213Spjd{ 778139213Spjd struct g_mirror_disk *disk; 779139213Spjd 780156610Spjd g_topology_assert_not(); 781156610Spjd sx_assert(&sc->sc_lock, SX_XLOCKED); 782139213Spjd KASSERT(g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_ACTIVE) > 0, 783139213Spjd ("%s called with no active disks (device=%s).", __func__, 784139213Spjd sc->sc_name)); 785139213Spjd 786139213Spjd sc->sc_genid++; 787139213Spjd G_MIRROR_DEBUG(1, "Device %s: genid bumped to %u.", sc->sc_name, 788139213Spjd sc->sc_genid); 789139213Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 790139213Spjd if (disk->d_state == G_MIRROR_DISK_STATE_ACTIVE || 791139213Spjd disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING) { 792139246Spjd disk->d_genid = sc->sc_genid; 793139213Spjd g_mirror_update_metadata(disk); 794139213Spjd } 795139213Spjd } 796139213Spjd} 797139213Spjd 798155539Spjdstatic int 799156610Spjdg_mirror_idle(struct g_mirror_softc *sc, int acw) 800137248Spjd{ 801137248Spjd struct g_mirror_disk *disk; 802155539Spjd int timeout; 803137248Spjd 804156610Spjd g_topology_assert_not(); 805156610Spjd sx_assert(&sc->sc_lock, SX_XLOCKED); 806156610Spjd 807155539Spjd if (sc->sc_provider == NULL) 808155539Spjd return (0); 809163888Spjd if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_NOFAILSYNC) != 0) 810163888Spjd return (0); 811155539Spjd if (sc->sc_idle) 812155539Spjd return (0); 813155539Spjd if (sc->sc_writes > 0) 814155539Spjd return (0); 815156610Spjd if (acw > 0 || (acw == -1 && sc->sc_provider->acw > 0)) { 816155581Spjd timeout = g_mirror_idletime - (time_uptime - sc->sc_last_write); 817245443Smav if (!g_mirror_shutdown && timeout > 0) 818155539Spjd return (timeout); 819155539Spjd } 820137248Spjd sc->sc_idle = 1; 821137248Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 822137248Spjd if (disk->d_state != G_MIRROR_DISK_STATE_ACTIVE) 823137248Spjd continue; 824137248Spjd G_MIRROR_DEBUG(1, "Disk %s (device %s) marked as clean.", 825137248Spjd g_mirror_get_diskname(disk), sc->sc_name); 826137248Spjd disk->d_flags &= ~G_MIRROR_DISK_FLAG_DIRTY; 827137248Spjd g_mirror_update_metadata(disk); 828137248Spjd } 829155539Spjd return (0); 830137248Spjd} 831137248Spjd 832137248Spjdstatic void 833137248Spjdg_mirror_unidle(struct g_mirror_softc *sc) 834137248Spjd{ 835137248Spjd struct g_mirror_disk *disk; 836137248Spjd 837156610Spjd g_topology_assert_not(); 838156610Spjd sx_assert(&sc->sc_lock, SX_XLOCKED); 839156610Spjd 840163888Spjd if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_NOFAILSYNC) != 0) 841163888Spjd return; 842137248Spjd sc->sc_idle = 0; 843155581Spjd sc->sc_last_write = time_uptime; 844137248Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 845137248Spjd if (disk->d_state != G_MIRROR_DISK_STATE_ACTIVE) 846137248Spjd continue; 847137248Spjd G_MIRROR_DEBUG(1, "Disk %s (device %s) marked as dirty.", 848137248Spjd g_mirror_get_diskname(disk), sc->sc_name); 849137248Spjd disk->d_flags |= G_MIRROR_DISK_FLAG_DIRTY; 850137248Spjd g_mirror_update_metadata(disk); 851137248Spjd } 852137248Spjd} 853137248Spjd 854132904Spjdstatic void 855132904Spjdg_mirror_done(struct bio *bp) 856132904Spjd{ 857132904Spjd struct g_mirror_softc *sc; 858132904Spjd 859132904Spjd sc = bp->bio_from->geom->softc; 860162282Spjd bp->bio_cflags = G_MIRROR_BIO_FLAG_REGULAR; 861132904Spjd mtx_lock(&sc->sc_queue_mtx); 862132904Spjd bioq_disksort(&sc->sc_queue, bp); 863201566Smav mtx_unlock(&sc->sc_queue_mtx); 864132904Spjd wakeup(sc); 865132904Spjd} 866132904Spjd 867132904Spjdstatic void 868132904Spjdg_mirror_regular_request(struct bio *bp) 869132904Spjd{ 870132904Spjd struct g_mirror_softc *sc; 871132904Spjd struct g_mirror_disk *disk; 872132904Spjd struct bio *pbp; 873132904Spjd 874132904Spjd g_topology_assert_not(); 875132904Spjd 876132904Spjd pbp = bp->bio_parent; 877132904Spjd sc = pbp->bio_to->geom->softc; 878155539Spjd bp->bio_from->index--; 879155539Spjd if (bp->bio_cmd == BIO_WRITE) 880155539Spjd sc->sc_writes--; 881132904Spjd disk = bp->bio_from->private; 882132904Spjd if (disk == NULL) { 883132904Spjd g_topology_lock(); 884132904Spjd g_mirror_kill_consumer(sc, bp->bio_from); 885132904Spjd g_topology_unlock(); 886132904Spjd } 887132904Spjd 888132904Spjd pbp->bio_inbed++; 889132904Spjd KASSERT(pbp->bio_inbed <= pbp->bio_children, 890132904Spjd ("bio_inbed (%u) is bigger than bio_children (%u).", pbp->bio_inbed, 891132904Spjd pbp->bio_children)); 892132904Spjd if (bp->bio_error == 0 && pbp->bio_error == 0) { 893132904Spjd G_MIRROR_LOGREQ(3, bp, "Request delivered."); 894132904Spjd g_destroy_bio(bp); 895132904Spjd if (pbp->bio_children == pbp->bio_inbed) { 896132904Spjd G_MIRROR_LOGREQ(3, pbp, "Request delivered."); 897132904Spjd pbp->bio_completed = pbp->bio_length; 898237929Sglebius if (pbp->bio_cmd == BIO_WRITE || 899237929Sglebius pbp->bio_cmd == BIO_DELETE) { 900156610Spjd bioq_remove(&sc->sc_inflight, pbp); 901156610Spjd /* Release delayed sync requests if possible. */ 902156610Spjd g_mirror_sync_release(sc); 903156610Spjd } 904132904Spjd g_io_deliver(pbp, pbp->bio_error); 905132904Spjd } 906132904Spjd return; 907132904Spjd } else if (bp->bio_error != 0) { 908132904Spjd if (pbp->bio_error == 0) 909132904Spjd pbp->bio_error = bp->bio_error; 910132904Spjd if (disk != NULL) { 911155545Spjd if ((disk->d_flags & G_MIRROR_DISK_FLAG_BROKEN) == 0) { 912155545Spjd disk->d_flags |= G_MIRROR_DISK_FLAG_BROKEN; 913155545Spjd G_MIRROR_LOGREQ(0, bp, 914155545Spjd "Request failed (error=%d).", 915155545Spjd bp->bio_error); 916155545Spjd } else { 917155545Spjd G_MIRROR_LOGREQ(1, bp, 918155545Spjd "Request failed (error=%d).", 919155545Spjd bp->bio_error); 920155545Spjd } 921155545Spjd if (g_mirror_disconnect_on_failure && 922155545Spjd g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_ACTIVE) > 1) 923155545Spjd { 924155545Spjd sc->sc_bump_id |= G_MIRROR_BUMP_GENID; 925155545Spjd g_mirror_event_send(disk, 926155545Spjd G_MIRROR_DISK_STATE_DISCONNECTED, 927155545Spjd G_MIRROR_EVENT_DONTWAIT); 928155545Spjd } 929132904Spjd } 930132904Spjd switch (pbp->bio_cmd) { 931132904Spjd case BIO_DELETE: 932132904Spjd case BIO_WRITE: 933132904Spjd pbp->bio_inbed--; 934132904Spjd pbp->bio_children--; 935132904Spjd break; 936132904Spjd } 937132904Spjd } 938132904Spjd g_destroy_bio(bp); 939132904Spjd 940132904Spjd switch (pbp->bio_cmd) { 941132904Spjd case BIO_READ: 942155545Spjd if (pbp->bio_inbed < pbp->bio_children) 943155545Spjd break; 944155545Spjd if (g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_ACTIVE) == 1) 945155545Spjd g_io_deliver(pbp, pbp->bio_error); 946155545Spjd else { 947132904Spjd pbp->bio_error = 0; 948132904Spjd mtx_lock(&sc->sc_queue_mtx); 949132904Spjd bioq_disksort(&sc->sc_queue, pbp); 950201566Smav mtx_unlock(&sc->sc_queue_mtx); 951132904Spjd G_MIRROR_DEBUG(4, "%s: Waking up %p.", __func__, sc); 952132904Spjd wakeup(sc); 953132904Spjd } 954132904Spjd break; 955132904Spjd case BIO_DELETE: 956132904Spjd case BIO_WRITE: 957132904Spjd if (pbp->bio_children == 0) { 958132904Spjd /* 959132904Spjd * All requests failed. 960132904Spjd */ 961132904Spjd } else if (pbp->bio_inbed < pbp->bio_children) { 962132904Spjd /* Do nothing. */ 963132904Spjd break; 964132904Spjd } else if (pbp->bio_children == pbp->bio_inbed) { 965132904Spjd /* Some requests succeeded. */ 966132904Spjd pbp->bio_error = 0; 967132904Spjd pbp->bio_completed = pbp->bio_length; 968132904Spjd } 969156610Spjd bioq_remove(&sc->sc_inflight, pbp); 970156610Spjd /* Release delayed sync requests if possible. */ 971156610Spjd g_mirror_sync_release(sc); 972132904Spjd g_io_deliver(pbp, pbp->bio_error); 973132904Spjd break; 974132904Spjd default: 975132904Spjd KASSERT(1 == 0, ("Invalid request: %u.", pbp->bio_cmd)); 976132904Spjd break; 977132904Spjd } 978132904Spjd} 979132904Spjd 980132904Spjdstatic void 981132904Spjdg_mirror_sync_done(struct bio *bp) 982132904Spjd{ 983132904Spjd struct g_mirror_softc *sc; 984132904Spjd 985132904Spjd G_MIRROR_LOGREQ(3, bp, "Synchronization request delivered."); 986132904Spjd sc = bp->bio_from->geom->softc; 987162282Spjd bp->bio_cflags = G_MIRROR_BIO_FLAG_SYNC; 988132904Spjd mtx_lock(&sc->sc_queue_mtx); 989132904Spjd bioq_disksort(&sc->sc_queue, bp); 990201566Smav mtx_unlock(&sc->sc_queue_mtx); 991132904Spjd wakeup(sc); 992132904Spjd} 993132904Spjd 994132904Spjdstatic void 995156421Spjdg_mirror_kernel_dump(struct bio *bp) 996156421Spjd{ 997156421Spjd struct g_mirror_softc *sc; 998156421Spjd struct g_mirror_disk *disk; 999156421Spjd struct bio *cbp; 1000156421Spjd struct g_kerneldump *gkd; 1001156421Spjd 1002156421Spjd /* 1003156421Spjd * We configure dumping to the first component, because this component 1004156421Spjd * will be used for reading with 'prefer' balance algorithm. 1005156421Spjd * If the component with the higest priority is currently disconnected 1006156421Spjd * we will not be able to read the dump after the reboot if it will be 1007156421Spjd * connected and synchronized later. Can we do something better? 1008156421Spjd */ 1009156421Spjd sc = bp->bio_to->geom->softc; 1010156421Spjd disk = LIST_FIRST(&sc->sc_disks); 1011156421Spjd 1012156421Spjd gkd = (struct g_kerneldump *)bp->bio_data; 1013156421Spjd if (gkd->length > bp->bio_to->mediasize) 1014156421Spjd gkd->length = bp->bio_to->mediasize; 1015156421Spjd cbp = g_clone_bio(bp); 1016156421Spjd if (cbp == NULL) { 1017156421Spjd g_io_deliver(bp, ENOMEM); 1018156421Spjd return; 1019156421Spjd } 1020156421Spjd cbp->bio_done = g_std_done; 1021156421Spjd g_io_request(cbp, disk->d_consumer); 1022156421Spjd G_MIRROR_DEBUG(1, "Kernel dump will go to %s.", 1023156421Spjd g_mirror_get_diskname(disk)); 1024156421Spjd} 1025156421Spjd 1026156421Spjdstatic void 1027163836Spjdg_mirror_flush(struct g_mirror_softc *sc, struct bio *bp) 1028163836Spjd{ 1029163836Spjd struct bio_queue_head queue; 1030163836Spjd struct g_mirror_disk *disk; 1031163836Spjd struct g_consumer *cp; 1032163836Spjd struct bio *cbp; 1033163836Spjd 1034163836Spjd bioq_init(&queue); 1035163836Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 1036163836Spjd if (disk->d_state != G_MIRROR_DISK_STATE_ACTIVE) 1037163836Spjd continue; 1038163836Spjd cbp = g_clone_bio(bp); 1039163836Spjd if (cbp == NULL) { 1040163836Spjd for (cbp = bioq_first(&queue); cbp != NULL; 1041163836Spjd cbp = bioq_first(&queue)) { 1042163836Spjd bioq_remove(&queue, cbp); 1043163836Spjd g_destroy_bio(cbp); 1044163836Spjd } 1045163836Spjd if (bp->bio_error == 0) 1046163836Spjd bp->bio_error = ENOMEM; 1047163836Spjd g_io_deliver(bp, bp->bio_error); 1048163836Spjd return; 1049163836Spjd } 1050163836Spjd bioq_insert_tail(&queue, cbp); 1051163836Spjd cbp->bio_done = g_std_done; 1052163836Spjd cbp->bio_caller1 = disk; 1053163836Spjd cbp->bio_to = disk->d_consumer->provider; 1054163836Spjd } 1055163836Spjd for (cbp = bioq_first(&queue); cbp != NULL; cbp = bioq_first(&queue)) { 1056163836Spjd bioq_remove(&queue, cbp); 1057163836Spjd G_MIRROR_LOGREQ(3, cbp, "Sending request."); 1058163836Spjd disk = cbp->bio_caller1; 1059163836Spjd cbp->bio_caller1 = NULL; 1060163836Spjd cp = disk->d_consumer; 1061163836Spjd KASSERT(cp->acr >= 1 && cp->acw >= 1 && cp->ace >= 1, 1062163836Spjd ("Consumer %s not opened (r%dw%de%d).", cp->provider->name, 1063163836Spjd cp->acr, cp->acw, cp->ace)); 1064163836Spjd g_io_request(cbp, disk->d_consumer); 1065163836Spjd } 1066163836Spjd} 1067163836Spjd 1068163836Spjdstatic void 1069132904Spjdg_mirror_start(struct bio *bp) 1070132904Spjd{ 1071132904Spjd struct g_mirror_softc *sc; 1072132904Spjd 1073132904Spjd sc = bp->bio_to->geom->softc; 1074132904Spjd /* 1075132904Spjd * If sc == NULL or there are no valid disks, provider's error 1076132904Spjd * should be set and g_mirror_start() should not be called at all. 1077132904Spjd */ 1078132904Spjd KASSERT(sc != NULL && sc->sc_state == G_MIRROR_DEVICE_STATE_RUNNING, 1079132904Spjd ("Provider's error should be set (error=%d)(mirror=%s).", 1080132904Spjd bp->bio_to->error, bp->bio_to->name)); 1081132904Spjd G_MIRROR_LOGREQ(3, bp, "Request received."); 1082132904Spjd 1083132904Spjd switch (bp->bio_cmd) { 1084132904Spjd case BIO_READ: 1085132904Spjd case BIO_WRITE: 1086132904Spjd case BIO_DELETE: 1087132904Spjd break; 1088163836Spjd case BIO_FLUSH: 1089163836Spjd g_mirror_flush(sc, bp); 1090163836Spjd return; 1091132904Spjd case BIO_GETATTR: 1092237930Sglebius if (g_handleattr_int(bp, "GEOM::candelete", 1)) 1093237930Sglebius return; 1094237930Sglebius else if (strcmp("GEOM::kerneldump", bp->bio_attribute) == 0) { 1095156421Spjd g_mirror_kernel_dump(bp); 1096156421Spjd return; 1097156421Spjd } 1098156421Spjd /* FALLTHROUGH */ 1099132904Spjd default: 1100132904Spjd g_io_deliver(bp, EOPNOTSUPP); 1101132904Spjd return; 1102132904Spjd } 1103132904Spjd mtx_lock(&sc->sc_queue_mtx); 1104132904Spjd bioq_disksort(&sc->sc_queue, bp); 1105201566Smav mtx_unlock(&sc->sc_queue_mtx); 1106132904Spjd G_MIRROR_DEBUG(4, "%s: Waking up %p.", __func__, sc); 1107132904Spjd wakeup(sc); 1108132904Spjd} 1109132904Spjd 1110132904Spjd/* 1111156610Spjd * Return TRUE if the given request is colliding with a in-progress 1112156610Spjd * synchronization request. 1113132904Spjd */ 1114156610Spjdstatic int 1115156610Spjdg_mirror_sync_collision(struct g_mirror_softc *sc, struct bio *bp) 1116132904Spjd{ 1117156610Spjd struct g_mirror_disk *disk; 1118156610Spjd struct bio *sbp; 1119156610Spjd off_t rstart, rend, sstart, send; 1120156610Spjd int i; 1121156610Spjd 1122156610Spjd if (sc->sc_sync.ds_ndisks == 0) 1123156610Spjd return (0); 1124156610Spjd rstart = bp->bio_offset; 1125156610Spjd rend = bp->bio_offset + bp->bio_length; 1126156610Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 1127156610Spjd if (disk->d_state != G_MIRROR_DISK_STATE_SYNCHRONIZING) 1128156610Spjd continue; 1129156610Spjd for (i = 0; i < g_mirror_syncreqs; i++) { 1130156610Spjd sbp = disk->d_sync.ds_bios[i]; 1131156610Spjd if (sbp == NULL) 1132156610Spjd continue; 1133156610Spjd sstart = sbp->bio_offset; 1134156610Spjd send = sbp->bio_offset + sbp->bio_length; 1135156610Spjd if (rend > sstart && rstart < send) 1136156610Spjd return (1); 1137156610Spjd } 1138156610Spjd } 1139156610Spjd return (0); 1140156610Spjd} 1141156610Spjd 1142156610Spjd/* 1143156610Spjd * Return TRUE if the given sync request is colliding with a in-progress regular 1144156610Spjd * request. 1145156610Spjd */ 1146156610Spjdstatic int 1147156610Spjdg_mirror_regular_collision(struct g_mirror_softc *sc, struct bio *sbp) 1148156610Spjd{ 1149156610Spjd off_t rstart, rend, sstart, send; 1150132904Spjd struct bio *bp; 1151132904Spjd 1152156610Spjd if (sc->sc_sync.ds_ndisks == 0) 1153156610Spjd return (0); 1154156610Spjd sstart = sbp->bio_offset; 1155156610Spjd send = sbp->bio_offset + sbp->bio_length; 1156156610Spjd TAILQ_FOREACH(bp, &sc->sc_inflight.queue, bio_queue) { 1157156610Spjd rstart = bp->bio_offset; 1158156610Spjd rend = bp->bio_offset + bp->bio_length; 1159156610Spjd if (rend > sstart && rstart < send) 1160156610Spjd return (1); 1161156610Spjd } 1162156610Spjd return (0); 1163156610Spjd} 1164132904Spjd 1165156610Spjd/* 1166156610Spjd * Puts request onto delayed queue. 1167156610Spjd */ 1168156610Spjdstatic void 1169156610Spjdg_mirror_regular_delay(struct g_mirror_softc *sc, struct bio *bp) 1170156610Spjd{ 1171156610Spjd 1172156610Spjd G_MIRROR_LOGREQ(2, bp, "Delaying request."); 1173156610Spjd bioq_insert_head(&sc->sc_regular_delayed, bp); 1174156610Spjd} 1175156610Spjd 1176156610Spjd/* 1177156610Spjd * Puts synchronization request onto delayed queue. 1178156610Spjd */ 1179156610Spjdstatic void 1180156610Spjdg_mirror_sync_delay(struct g_mirror_softc *sc, struct bio *bp) 1181156610Spjd{ 1182156610Spjd 1183156610Spjd G_MIRROR_LOGREQ(2, bp, "Delaying synchronization request."); 1184156610Spjd bioq_insert_tail(&sc->sc_sync_delayed, bp); 1185156610Spjd} 1186156610Spjd 1187156610Spjd/* 1188156610Spjd * Releases delayed regular requests which don't collide anymore with sync 1189156610Spjd * requests. 1190156610Spjd */ 1191156610Spjdstatic void 1192156610Spjdg_mirror_regular_release(struct g_mirror_softc *sc) 1193156610Spjd{ 1194156610Spjd struct bio *bp, *bp2; 1195156610Spjd 1196156610Spjd TAILQ_FOREACH_SAFE(bp, &sc->sc_regular_delayed.queue, bio_queue, bp2) { 1197156610Spjd if (g_mirror_sync_collision(sc, bp)) 1198156610Spjd continue; 1199156610Spjd bioq_remove(&sc->sc_regular_delayed, bp); 1200156610Spjd G_MIRROR_LOGREQ(2, bp, "Releasing delayed request (%p).", bp); 1201156610Spjd mtx_lock(&sc->sc_queue_mtx); 1202156610Spjd bioq_insert_head(&sc->sc_queue, bp); 1203156610Spjd#if 0 1204156610Spjd /* 1205156610Spjd * wakeup() is not needed, because this function is called from 1206156610Spjd * the worker thread. 1207156610Spjd */ 1208156610Spjd wakeup(&sc->sc_queue); 1209156610Spjd#endif 1210156610Spjd mtx_unlock(&sc->sc_queue_mtx); 1211132904Spjd } 1212132904Spjd} 1213132904Spjd 1214156610Spjd/* 1215156610Spjd * Releases delayed sync requests which don't collide anymore with regular 1216156610Spjd * requests. 1217156610Spjd */ 1218132904Spjdstatic void 1219156610Spjdg_mirror_sync_release(struct g_mirror_softc *sc) 1220156610Spjd{ 1221156610Spjd struct bio *bp, *bp2; 1222156610Spjd 1223156610Spjd TAILQ_FOREACH_SAFE(bp, &sc->sc_sync_delayed.queue, bio_queue, bp2) { 1224156610Spjd if (g_mirror_regular_collision(sc, bp)) 1225156610Spjd continue; 1226156610Spjd bioq_remove(&sc->sc_sync_delayed, bp); 1227156610Spjd G_MIRROR_LOGREQ(2, bp, 1228156610Spjd "Releasing delayed synchronization request."); 1229156610Spjd g_io_request(bp, bp->bio_from); 1230156610Spjd } 1231156610Spjd} 1232156610Spjd 1233156610Spjd/* 1234156610Spjd * Handle synchronization requests. 1235156610Spjd * Every synchronization request is two-steps process: first, READ request is 1236156610Spjd * send to active provider and then WRITE request (with read data) to the provider 1237156610Spjd * beeing synchronized. When WRITE is finished, new synchronization request is 1238156610Spjd * send. 1239156610Spjd */ 1240156610Spjdstatic void 1241132904Spjdg_mirror_sync_request(struct bio *bp) 1242132904Spjd{ 1243132904Spjd struct g_mirror_softc *sc; 1244132904Spjd struct g_mirror_disk *disk; 1245132904Spjd 1246137248Spjd bp->bio_from->index--; 1247132904Spjd sc = bp->bio_from->geom->softc; 1248132904Spjd disk = bp->bio_from->private; 1249132904Spjd if (disk == NULL) { 1250156610Spjd sx_xunlock(&sc->sc_lock); /* Avoid recursion on sc_lock. */ 1251132904Spjd g_topology_lock(); 1252132904Spjd g_mirror_kill_consumer(sc, bp->bio_from); 1253132904Spjd g_topology_unlock(); 1254156610Spjd free(bp->bio_data, M_MIRROR); 1255132904Spjd g_destroy_bio(bp); 1256156610Spjd sx_xlock(&sc->sc_lock); 1257132904Spjd return; 1258132904Spjd } 1259132904Spjd 1260132904Spjd /* 1261132904Spjd * Synchronization request. 1262132904Spjd */ 1263132904Spjd switch (bp->bio_cmd) { 1264132904Spjd case BIO_READ: 1265132904Spjd { 1266132904Spjd struct g_consumer *cp; 1267132904Spjd 1268132904Spjd if (bp->bio_error != 0) { 1269132904Spjd G_MIRROR_LOGREQ(0, bp, 1270132904Spjd "Synchronization request failed (error=%d).", 1271132904Spjd bp->bio_error); 1272132904Spjd g_destroy_bio(bp); 1273132904Spjd return; 1274132904Spjd } 1275137248Spjd G_MIRROR_LOGREQ(3, bp, 1276137248Spjd "Synchronization request half-finished."); 1277132904Spjd bp->bio_cmd = BIO_WRITE; 1278133142Spjd bp->bio_cflags = 0; 1279132904Spjd cp = disk->d_consumer; 1280156610Spjd KASSERT(cp->acr >= 1 && cp->acw >= 1 && cp->ace >= 1, 1281132904Spjd ("Consumer %s not opened (r%dw%de%d).", cp->provider->name, 1282132904Spjd cp->acr, cp->acw, cp->ace)); 1283137248Spjd cp->index++; 1284132904Spjd g_io_request(bp, cp); 1285132904Spjd return; 1286132904Spjd } 1287132904Spjd case BIO_WRITE: 1288135833Spjd { 1289135833Spjd struct g_mirror_disk_sync *sync; 1290156610Spjd off_t offset; 1291156610Spjd void *data; 1292156610Spjd int i; 1293135833Spjd 1294132904Spjd if (bp->bio_error != 0) { 1295132904Spjd G_MIRROR_LOGREQ(0, bp, 1296132904Spjd "Synchronization request failed (error=%d).", 1297132904Spjd bp->bio_error); 1298132904Spjd g_destroy_bio(bp); 1299139670Spjd sc->sc_bump_id |= G_MIRROR_BUMP_GENID; 1300132904Spjd g_mirror_event_send(disk, 1301132904Spjd G_MIRROR_DISK_STATE_DISCONNECTED, 1302132904Spjd G_MIRROR_EVENT_DONTWAIT); 1303132904Spjd return; 1304132904Spjd } 1305132904Spjd G_MIRROR_LOGREQ(3, bp, "Synchronization request finished."); 1306135833Spjd sync = &disk->d_sync; 1307156610Spjd if (sync->ds_offset == sc->sc_mediasize || 1308156610Spjd sync->ds_consumer == NULL || 1309156610Spjd (sc->sc_flags & G_MIRROR_DEVICE_FLAG_DESTROY) != 0) { 1310156610Spjd /* Don't send more synchronization requests. */ 1311156610Spjd sync->ds_inflight--; 1312156610Spjd if (sync->ds_bios != NULL) { 1313156684Sru i = (int)(uintptr_t)bp->bio_caller1; 1314156610Spjd sync->ds_bios[i] = NULL; 1315156610Spjd } 1316156610Spjd free(bp->bio_data, M_MIRROR); 1317156610Spjd g_destroy_bio(bp); 1318156610Spjd if (sync->ds_inflight > 0) 1319156610Spjd return; 1320156610Spjd if (sync->ds_consumer == NULL || 1321156610Spjd (sc->sc_flags & G_MIRROR_DEVICE_FLAG_DESTROY) != 0) { 1322156610Spjd return; 1323156610Spjd } 1324156610Spjd /* Disk up-to-date, activate it. */ 1325132904Spjd g_mirror_event_send(disk, G_MIRROR_DISK_STATE_ACTIVE, 1326132904Spjd G_MIRROR_EVENT_DONTWAIT); 1327132904Spjd return; 1328156610Spjd } 1329156610Spjd 1330156610Spjd /* Send next synchronization request. */ 1331156610Spjd data = bp->bio_data; 1332156610Spjd bzero(bp, sizeof(*bp)); 1333156610Spjd bp->bio_cmd = BIO_READ; 1334156610Spjd bp->bio_offset = sync->ds_offset; 1335156610Spjd bp->bio_length = MIN(MAXPHYS, sc->sc_mediasize - bp->bio_offset); 1336156610Spjd sync->ds_offset += bp->bio_length; 1337156610Spjd bp->bio_done = g_mirror_sync_done; 1338156610Spjd bp->bio_data = data; 1339156610Spjd bp->bio_from = sync->ds_consumer; 1340156610Spjd bp->bio_to = sc->sc_provider; 1341156610Spjd G_MIRROR_LOGREQ(3, bp, "Sending synchronization request."); 1342156610Spjd sync->ds_consumer->index++; 1343156610Spjd /* 1344156610Spjd * Delay the request if it is colliding with a regular request. 1345156610Spjd */ 1346156610Spjd if (g_mirror_regular_collision(sc, bp)) 1347156610Spjd g_mirror_sync_delay(sc, bp); 1348156610Spjd else 1349156610Spjd g_io_request(bp, sync->ds_consumer); 1350156610Spjd 1351156610Spjd /* Release delayed requests if possible. */ 1352156610Spjd g_mirror_regular_release(sc); 1353156610Spjd 1354156610Spjd /* Find the smallest offset */ 1355156610Spjd offset = sc->sc_mediasize; 1356156610Spjd for (i = 0; i < g_mirror_syncreqs; i++) { 1357156610Spjd bp = sync->ds_bios[i]; 1358156610Spjd if (bp->bio_offset < offset) 1359156610Spjd offset = bp->bio_offset; 1360156610Spjd } 1361156610Spjd if (sync->ds_offset_done + (MAXPHYS * 100) < offset) { 1362156610Spjd /* Update offset_done on every 100 blocks. */ 1363156610Spjd sync->ds_offset_done = offset; 1364132904Spjd g_mirror_update_metadata(disk); 1365132904Spjd } 1366132904Spjd return; 1367135833Spjd } 1368132904Spjd default: 1369132904Spjd KASSERT(1 == 0, ("Invalid command here: %u (device=%s)", 1370132904Spjd bp->bio_cmd, sc->sc_name)); 1371132904Spjd break; 1372132904Spjd } 1373132904Spjd} 1374132904Spjd 1375132904Spjdstatic void 1376133115Spjdg_mirror_request_prefer(struct g_mirror_softc *sc, struct bio *bp) 1377133115Spjd{ 1378133115Spjd struct g_mirror_disk *disk; 1379133115Spjd struct g_consumer *cp; 1380133115Spjd struct bio *cbp; 1381133115Spjd 1382133115Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 1383133115Spjd if (disk->d_state == G_MIRROR_DISK_STATE_ACTIVE) 1384133115Spjd break; 1385133115Spjd } 1386133115Spjd if (disk == NULL) { 1387133115Spjd if (bp->bio_error == 0) 1388133115Spjd bp->bio_error = ENXIO; 1389133115Spjd g_io_deliver(bp, bp->bio_error); 1390133115Spjd return; 1391133115Spjd } 1392133115Spjd cbp = g_clone_bio(bp); 1393133115Spjd if (cbp == NULL) { 1394133115Spjd if (bp->bio_error == 0) 1395133115Spjd bp->bio_error = ENOMEM; 1396133115Spjd g_io_deliver(bp, bp->bio_error); 1397133115Spjd return; 1398133115Spjd } 1399133115Spjd /* 1400133115Spjd * Fill in the component buf structure. 1401133115Spjd */ 1402133115Spjd cp = disk->d_consumer; 1403133115Spjd cbp->bio_done = g_mirror_done; 1404133115Spjd cbp->bio_to = cp->provider; 1405133115Spjd G_MIRROR_LOGREQ(3, cbp, "Sending request."); 1406156610Spjd KASSERT(cp->acr >= 1 && cp->acw >= 1 && cp->ace >= 1, 1407133115Spjd ("Consumer %s not opened (r%dw%de%d).", cp->provider->name, cp->acr, 1408133115Spjd cp->acw, cp->ace)); 1409137248Spjd cp->index++; 1410133115Spjd g_io_request(cbp, cp); 1411133115Spjd} 1412133115Spjd 1413133115Spjdstatic void 1414132904Spjdg_mirror_request_round_robin(struct g_mirror_softc *sc, struct bio *bp) 1415132904Spjd{ 1416132904Spjd struct g_mirror_disk *disk; 1417132904Spjd struct g_consumer *cp; 1418132904Spjd struct bio *cbp; 1419132904Spjd 1420132904Spjd disk = g_mirror_get_disk(sc); 1421132904Spjd if (disk == NULL) { 1422132904Spjd if (bp->bio_error == 0) 1423132904Spjd bp->bio_error = ENXIO; 1424132904Spjd g_io_deliver(bp, bp->bio_error); 1425132904Spjd return; 1426132904Spjd } 1427132904Spjd cbp = g_clone_bio(bp); 1428132904Spjd if (cbp == NULL) { 1429132904Spjd if (bp->bio_error == 0) 1430132904Spjd bp->bio_error = ENOMEM; 1431132904Spjd g_io_deliver(bp, bp->bio_error); 1432132904Spjd return; 1433132904Spjd } 1434132904Spjd /* 1435132904Spjd * Fill in the component buf structure. 1436132904Spjd */ 1437132904Spjd cp = disk->d_consumer; 1438132904Spjd cbp->bio_done = g_mirror_done; 1439132904Spjd cbp->bio_to = cp->provider; 1440132904Spjd G_MIRROR_LOGREQ(3, cbp, "Sending request."); 1441156610Spjd KASSERT(cp->acr >= 1 && cp->acw >= 1 && cp->ace >= 1, 1442132904Spjd ("Consumer %s not opened (r%dw%de%d).", cp->provider->name, cp->acr, 1443132904Spjd cp->acw, cp->ace)); 1444137248Spjd cp->index++; 1445132904Spjd g_io_request(cbp, cp); 1446132904Spjd} 1447132904Spjd 1448200086Smav#define TRACK_SIZE (1 * 1024 * 1024) 1449200086Smav#define LOAD_SCALE 256 1450200086Smav#define ABS(x) (((x) >= 0) ? (x) : (-(x))) 1451200086Smav 1452132904Spjdstatic void 1453132904Spjdg_mirror_request_load(struct g_mirror_softc *sc, struct bio *bp) 1454132904Spjd{ 1455132904Spjd struct g_mirror_disk *disk, *dp; 1456132904Spjd struct g_consumer *cp; 1457132904Spjd struct bio *cbp; 1458200086Smav int prio, best; 1459132904Spjd 1460200086Smav /* Find a disk with the smallest load. */ 1461132904Spjd disk = NULL; 1462200086Smav best = INT_MAX; 1463132904Spjd LIST_FOREACH(dp, &sc->sc_disks, d_next) { 1464132904Spjd if (dp->d_state != G_MIRROR_DISK_STATE_ACTIVE) 1465132904Spjd continue; 1466200086Smav prio = dp->load; 1467200086Smav /* If disk head is precisely in position - highly prefer it. */ 1468200086Smav if (dp->d_last_offset == bp->bio_offset) 1469200086Smav prio -= 2 * LOAD_SCALE; 1470200086Smav else 1471200086Smav /* If disk head is close to position - prefer it. */ 1472200086Smav if (ABS(dp->d_last_offset - bp->bio_offset) < TRACK_SIZE) 1473200086Smav prio -= 1 * LOAD_SCALE; 1474200086Smav if (prio <= best) { 1475132904Spjd disk = dp; 1476200086Smav best = prio; 1477132904Spjd } 1478132904Spjd } 1479146110Spjd KASSERT(disk != NULL, ("NULL disk for %s.", sc->sc_name)); 1480132904Spjd cbp = g_clone_bio(bp); 1481132904Spjd if (cbp == NULL) { 1482132904Spjd if (bp->bio_error == 0) 1483132904Spjd bp->bio_error = ENOMEM; 1484132904Spjd g_io_deliver(bp, bp->bio_error); 1485132904Spjd return; 1486132904Spjd } 1487132904Spjd /* 1488132904Spjd * Fill in the component buf structure. 1489132904Spjd */ 1490132904Spjd cp = disk->d_consumer; 1491132904Spjd cbp->bio_done = g_mirror_done; 1492132904Spjd cbp->bio_to = cp->provider; 1493132904Spjd G_MIRROR_LOGREQ(3, cbp, "Sending request."); 1494156610Spjd KASSERT(cp->acr >= 1 && cp->acw >= 1 && cp->ace >= 1, 1495132904Spjd ("Consumer %s not opened (r%dw%de%d).", cp->provider->name, cp->acr, 1496132904Spjd cp->acw, cp->ace)); 1497137248Spjd cp->index++; 1498200086Smav /* Remember last head position */ 1499200086Smav disk->d_last_offset = bp->bio_offset + bp->bio_length; 1500200086Smav /* Update loads. */ 1501200086Smav LIST_FOREACH(dp, &sc->sc_disks, d_next) { 1502200086Smav dp->load = (dp->d_consumer->index * LOAD_SCALE + 1503200086Smav dp->load * 7) / 8; 1504200086Smav } 1505132904Spjd g_io_request(cbp, cp); 1506132904Spjd} 1507132904Spjd 1508132904Spjdstatic void 1509132904Spjdg_mirror_request_split(struct g_mirror_softc *sc, struct bio *bp) 1510132904Spjd{ 1511132904Spjd struct bio_queue_head queue; 1512132904Spjd struct g_mirror_disk *disk; 1513132904Spjd struct g_consumer *cp; 1514132904Spjd struct bio *cbp; 1515132904Spjd off_t left, mod, offset, slice; 1516132904Spjd u_char *data; 1517132904Spjd u_int ndisks; 1518132904Spjd 1519132904Spjd if (bp->bio_length <= sc->sc_slice) { 1520132904Spjd g_mirror_request_round_robin(sc, bp); 1521132904Spjd return; 1522132904Spjd } 1523132904Spjd ndisks = g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_ACTIVE); 1524132904Spjd slice = bp->bio_length / ndisks; 1525132904Spjd mod = slice % sc->sc_provider->sectorsize; 1526132904Spjd if (mod != 0) 1527132904Spjd slice += sc->sc_provider->sectorsize - mod; 1528132904Spjd /* 1529132904Spjd * Allocate all bios before sending any request, so we can 1530132904Spjd * return ENOMEM in nice and clean way. 1531132904Spjd */ 1532132904Spjd left = bp->bio_length; 1533132904Spjd offset = bp->bio_offset; 1534132904Spjd data = bp->bio_data; 1535132904Spjd bioq_init(&queue); 1536132904Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 1537132904Spjd if (disk->d_state != G_MIRROR_DISK_STATE_ACTIVE) 1538132904Spjd continue; 1539132904Spjd cbp = g_clone_bio(bp); 1540132904Spjd if (cbp == NULL) { 1541132904Spjd for (cbp = bioq_first(&queue); cbp != NULL; 1542132904Spjd cbp = bioq_first(&queue)) { 1543132904Spjd bioq_remove(&queue, cbp); 1544132904Spjd g_destroy_bio(cbp); 1545132904Spjd } 1546132904Spjd if (bp->bio_error == 0) 1547132904Spjd bp->bio_error = ENOMEM; 1548132904Spjd g_io_deliver(bp, bp->bio_error); 1549132904Spjd return; 1550132904Spjd } 1551132904Spjd bioq_insert_tail(&queue, cbp); 1552132904Spjd cbp->bio_done = g_mirror_done; 1553132904Spjd cbp->bio_caller1 = disk; 1554132904Spjd cbp->bio_to = disk->d_consumer->provider; 1555132904Spjd cbp->bio_offset = offset; 1556132904Spjd cbp->bio_data = data; 1557132904Spjd cbp->bio_length = MIN(left, slice); 1558132904Spjd left -= cbp->bio_length; 1559132904Spjd if (left == 0) 1560132904Spjd break; 1561132904Spjd offset += cbp->bio_length; 1562132904Spjd data += cbp->bio_length; 1563132904Spjd } 1564132904Spjd for (cbp = bioq_first(&queue); cbp != NULL; cbp = bioq_first(&queue)) { 1565132904Spjd bioq_remove(&queue, cbp); 1566132904Spjd G_MIRROR_LOGREQ(3, cbp, "Sending request."); 1567132904Spjd disk = cbp->bio_caller1; 1568132904Spjd cbp->bio_caller1 = NULL; 1569132904Spjd cp = disk->d_consumer; 1570156610Spjd KASSERT(cp->acr >= 1 && cp->acw >= 1 && cp->ace >= 1, 1571132904Spjd ("Consumer %s not opened (r%dw%de%d).", cp->provider->name, 1572132904Spjd cp->acr, cp->acw, cp->ace)); 1573137248Spjd disk->d_consumer->index++; 1574132904Spjd g_io_request(cbp, disk->d_consumer); 1575132904Spjd } 1576132904Spjd} 1577132904Spjd 1578132904Spjdstatic void 1579132904Spjdg_mirror_register_request(struct bio *bp) 1580132904Spjd{ 1581132904Spjd struct g_mirror_softc *sc; 1582132904Spjd 1583132904Spjd sc = bp->bio_to->geom->softc; 1584132904Spjd switch (bp->bio_cmd) { 1585132904Spjd case BIO_READ: 1586132904Spjd switch (sc->sc_balance) { 1587133115Spjd case G_MIRROR_BALANCE_LOAD: 1588133115Spjd g_mirror_request_load(sc, bp); 1589133115Spjd break; 1590133115Spjd case G_MIRROR_BALANCE_PREFER: 1591133115Spjd g_mirror_request_prefer(sc, bp); 1592133115Spjd break; 1593132904Spjd case G_MIRROR_BALANCE_ROUND_ROBIN: 1594132904Spjd g_mirror_request_round_robin(sc, bp); 1595132904Spjd break; 1596132904Spjd case G_MIRROR_BALANCE_SPLIT: 1597132904Spjd g_mirror_request_split(sc, bp); 1598132904Spjd break; 1599132904Spjd } 1600132904Spjd return; 1601132904Spjd case BIO_WRITE: 1602132904Spjd case BIO_DELETE: 1603132904Spjd { 1604132904Spjd struct g_mirror_disk *disk; 1605135833Spjd struct g_mirror_disk_sync *sync; 1606132904Spjd struct bio_queue_head queue; 1607132904Spjd struct g_consumer *cp; 1608132904Spjd struct bio *cbp; 1609132904Spjd 1610156610Spjd /* 1611156610Spjd * Delay the request if it is colliding with a synchronization 1612156610Spjd * request. 1613156610Spjd */ 1614156610Spjd if (g_mirror_sync_collision(sc, bp)) { 1615156610Spjd g_mirror_regular_delay(sc, bp); 1616156610Spjd return; 1617156610Spjd } 1618156610Spjd 1619137248Spjd if (sc->sc_idle) 1620137248Spjd g_mirror_unidle(sc); 1621155539Spjd else 1622155581Spjd sc->sc_last_write = time_uptime; 1623155539Spjd 1624132904Spjd /* 1625132904Spjd * Allocate all bios before sending any request, so we can 1626132904Spjd * return ENOMEM in nice and clean way. 1627132904Spjd */ 1628132904Spjd bioq_init(&queue); 1629132904Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 1630135833Spjd sync = &disk->d_sync; 1631132904Spjd switch (disk->d_state) { 1632132904Spjd case G_MIRROR_DISK_STATE_ACTIVE: 1633132904Spjd break; 1634132904Spjd case G_MIRROR_DISK_STATE_SYNCHRONIZING: 1635135833Spjd if (bp->bio_offset >= sync->ds_offset) 1636132904Spjd continue; 1637132904Spjd break; 1638132904Spjd default: 1639132904Spjd continue; 1640132904Spjd } 1641237930Sglebius if (bp->bio_cmd == BIO_DELETE && 1642237930Sglebius (disk->d_flags & G_MIRROR_DISK_FLAG_CANDELETE) == 0) 1643237930Sglebius continue; 1644132904Spjd cbp = g_clone_bio(bp); 1645132904Spjd if (cbp == NULL) { 1646132904Spjd for (cbp = bioq_first(&queue); cbp != NULL; 1647132904Spjd cbp = bioq_first(&queue)) { 1648132904Spjd bioq_remove(&queue, cbp); 1649132904Spjd g_destroy_bio(cbp); 1650132904Spjd } 1651132904Spjd if (bp->bio_error == 0) 1652132904Spjd bp->bio_error = ENOMEM; 1653132904Spjd g_io_deliver(bp, bp->bio_error); 1654132904Spjd return; 1655132904Spjd } 1656132904Spjd bioq_insert_tail(&queue, cbp); 1657135831Spjd cbp->bio_done = g_mirror_done; 1658132904Spjd cp = disk->d_consumer; 1659135831Spjd cbp->bio_caller1 = cp; 1660132904Spjd cbp->bio_to = cp->provider; 1661156610Spjd KASSERT(cp->acr >= 1 && cp->acw >= 1 && cp->ace >= 1, 1662132904Spjd ("Consumer %s not opened (r%dw%de%d).", 1663132904Spjd cp->provider->name, cp->acr, cp->acw, cp->ace)); 1664135831Spjd } 1665135831Spjd for (cbp = bioq_first(&queue); cbp != NULL; 1666135831Spjd cbp = bioq_first(&queue)) { 1667135831Spjd bioq_remove(&queue, cbp); 1668135831Spjd G_MIRROR_LOGREQ(3, cbp, "Sending request."); 1669135831Spjd cp = cbp->bio_caller1; 1670135831Spjd cbp->bio_caller1 = NULL; 1671137248Spjd cp->index++; 1672155539Spjd sc->sc_writes++; 1673132904Spjd g_io_request(cbp, cp); 1674132904Spjd } 1675132904Spjd /* 1676156610Spjd * Put request onto inflight queue, so we can check if new 1677156610Spjd * synchronization requests don't collide with it. 1678156610Spjd */ 1679156610Spjd bioq_insert_tail(&sc->sc_inflight, bp); 1680156610Spjd /* 1681132904Spjd * Bump syncid on first write. 1682132904Spjd */ 1683139670Spjd if ((sc->sc_bump_id & G_MIRROR_BUMP_SYNCID) != 0) { 1684139213Spjd sc->sc_bump_id &= ~G_MIRROR_BUMP_SYNCID; 1685139051Spjd g_mirror_bump_syncid(sc); 1686132904Spjd } 1687132904Spjd return; 1688132904Spjd } 1689132904Spjd default: 1690132904Spjd KASSERT(1 == 0, ("Invalid command here: %u (device=%s)", 1691132904Spjd bp->bio_cmd, sc->sc_name)); 1692132904Spjd break; 1693132904Spjd } 1694132904Spjd} 1695132904Spjd 1696133484Spjdstatic int 1697133484Spjdg_mirror_can_destroy(struct g_mirror_softc *sc) 1698133484Spjd{ 1699133484Spjd struct g_geom *gp; 1700133484Spjd struct g_consumer *cp; 1701133484Spjd 1702133484Spjd g_topology_assert(); 1703133484Spjd gp = sc->sc_geom; 1704158112Spjd if (gp->softc == NULL) 1705158112Spjd return (1); 1706235599Sae if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_TASTING) != 0) 1707235599Sae return (0); 1708133484Spjd LIST_FOREACH(cp, &gp->consumer, consumer) { 1709133484Spjd if (g_mirror_is_busy(sc, cp)) 1710133484Spjd return (0); 1711133484Spjd } 1712133484Spjd gp = sc->sc_sync.ds_geom; 1713133484Spjd LIST_FOREACH(cp, &gp->consumer, consumer) { 1714133484Spjd if (g_mirror_is_busy(sc, cp)) 1715133484Spjd return (0); 1716133484Spjd } 1717133484Spjd G_MIRROR_DEBUG(2, "No I/O requests for %s, it can be destroyed.", 1718133484Spjd sc->sc_name); 1719133484Spjd return (1); 1720133484Spjd} 1721133484Spjd 1722133484Spjdstatic int 1723133484Spjdg_mirror_try_destroy(struct g_mirror_softc *sc) 1724133484Spjd{ 1725133484Spjd 1726146616Spjd if (sc->sc_rootmount != NULL) { 1727146616Spjd G_MIRROR_DEBUG(1, "root_mount_rel[%u] %p", __LINE__, 1728146616Spjd sc->sc_rootmount); 1729146616Spjd root_mount_rel(sc->sc_rootmount); 1730146616Spjd sc->sc_rootmount = NULL; 1731146616Spjd } 1732139213Spjd g_topology_lock(); 1733139213Spjd if (!g_mirror_can_destroy(sc)) { 1734139213Spjd g_topology_unlock(); 1735139213Spjd return (0); 1736139213Spjd } 1737158112Spjd sc->sc_geom->softc = NULL; 1738158112Spjd sc->sc_sync.ds_geom->softc = NULL; 1739133484Spjd if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_WAIT) != 0) { 1740133484Spjd g_topology_unlock(); 1741133484Spjd G_MIRROR_DEBUG(4, "%s: Waking up %p.", __func__, 1742133484Spjd &sc->sc_worker); 1743156610Spjd /* Unlock sc_lock here, as it can be destroyed after wakeup. */ 1744156610Spjd sx_xunlock(&sc->sc_lock); 1745133484Spjd wakeup(&sc->sc_worker); 1746133484Spjd sc->sc_worker = NULL; 1747133484Spjd } else { 1748156610Spjd g_topology_unlock(); 1749133484Spjd g_mirror_destroy_device(sc); 1750133484Spjd free(sc, M_MIRROR); 1751133484Spjd } 1752133484Spjd return (1); 1753133484Spjd} 1754133484Spjd 1755132904Spjd/* 1756132904Spjd * Worker thread. 1757132904Spjd */ 1758132904Spjdstatic void 1759132904Spjdg_mirror_worker(void *arg) 1760132904Spjd{ 1761132904Spjd struct g_mirror_softc *sc; 1762132904Spjd struct g_mirror_event *ep; 1763132904Spjd struct bio *bp; 1764155539Spjd int timeout; 1765132904Spjd 1766132904Spjd sc = arg; 1767170307Sjeff thread_lock(curthread); 1768139451Sjhb sched_prio(curthread, PRIBIO); 1769170307Sjeff thread_unlock(curthread); 1770132904Spjd 1771156610Spjd sx_xlock(&sc->sc_lock); 1772132904Spjd for (;;) { 1773132904Spjd G_MIRROR_DEBUG(5, "%s: Let's see...", __func__); 1774132904Spjd /* 1775132904Spjd * First take a look at events. 1776132904Spjd * This is important to handle events before any I/O requests. 1777132904Spjd */ 1778132904Spjd ep = g_mirror_event_get(sc); 1779156610Spjd if (ep != NULL) { 1780139140Spjd g_mirror_event_remove(sc, ep); 1781132904Spjd if ((ep->e_flags & G_MIRROR_EVENT_DEVICE) != 0) { 1782132904Spjd /* Update only device status. */ 1783132904Spjd G_MIRROR_DEBUG(3, 1784132904Spjd "Running event for device %s.", 1785132904Spjd sc->sc_name); 1786132904Spjd ep->e_error = 0; 1787139051Spjd g_mirror_update_device(sc, 1); 1788132904Spjd } else { 1789132904Spjd /* Update disk status. */ 1790132904Spjd G_MIRROR_DEBUG(3, "Running event for disk %s.", 1791132904Spjd g_mirror_get_diskname(ep->e_disk)); 1792132904Spjd ep->e_error = g_mirror_update_disk(ep->e_disk, 1793139051Spjd ep->e_state); 1794132904Spjd if (ep->e_error == 0) 1795139051Spjd g_mirror_update_device(sc, 0); 1796132904Spjd } 1797132904Spjd if ((ep->e_flags & G_MIRROR_EVENT_DONTWAIT) != 0) { 1798132904Spjd KASSERT(ep->e_error == 0, 1799132904Spjd ("Error cannot be handled.")); 1800132904Spjd g_mirror_event_free(ep); 1801132904Spjd } else { 1802132904Spjd ep->e_flags |= G_MIRROR_EVENT_DONE; 1803132904Spjd G_MIRROR_DEBUG(4, "%s: Waking up %p.", __func__, 1804132904Spjd ep); 1805132904Spjd mtx_lock(&sc->sc_events_mtx); 1806132904Spjd wakeup(ep); 1807132904Spjd mtx_unlock(&sc->sc_events_mtx); 1808132904Spjd } 1809132904Spjd if ((sc->sc_flags & 1810132904Spjd G_MIRROR_DEVICE_FLAG_DESTROY) != 0) { 1811156610Spjd if (g_mirror_try_destroy(sc)) { 1812156610Spjd curthread->td_pflags &= ~TDP_GEOM; 1813156610Spjd G_MIRROR_DEBUG(1, "Thread exiting."); 1814172836Sjulian kproc_exit(0); 1815156610Spjd } 1816132904Spjd } 1817132904Spjd G_MIRROR_DEBUG(5, "%s: I'm here 1.", __func__); 1818132904Spjd continue; 1819132904Spjd } 1820132904Spjd /* 1821155539Spjd * Check if we can mark array as CLEAN and if we can't take 1822155539Spjd * how much seconds should we wait. 1823155539Spjd */ 1824156610Spjd timeout = g_mirror_idle(sc, -1); 1825155539Spjd /* 1826132904Spjd * Now I/O requests. 1827132904Spjd */ 1828132904Spjd /* Get first request from the queue. */ 1829132904Spjd mtx_lock(&sc->sc_queue_mtx); 1830132904Spjd bp = bioq_first(&sc->sc_queue); 1831132904Spjd if (bp == NULL) { 1832132904Spjd if ((sc->sc_flags & 1833132904Spjd G_MIRROR_DEVICE_FLAG_DESTROY) != 0) { 1834132904Spjd mtx_unlock(&sc->sc_queue_mtx); 1835156610Spjd if (g_mirror_try_destroy(sc)) { 1836156610Spjd curthread->td_pflags &= ~TDP_GEOM; 1837156610Spjd G_MIRROR_DEBUG(1, "Thread exiting."); 1838172836Sjulian kproc_exit(0); 1839156610Spjd } 1840133484Spjd mtx_lock(&sc->sc_queue_mtx); 1841132904Spjd } 1842156610Spjd sx_xunlock(&sc->sc_lock); 1843158116Spjd /* 1844158116Spjd * XXX: We can miss an event here, because an event 1845158116Spjd * can be added without sx-device-lock and without 1846158116Spjd * mtx-queue-lock. Maybe I should just stop using 1847158116Spjd * dedicated mutex for events synchronization and 1848158116Spjd * stick with the queue lock? 1849158116Spjd * The event will hang here until next I/O request 1850158116Spjd * or next event is received. 1851158116Spjd */ 1852155539Spjd MSLEEP(sc, &sc->sc_queue_mtx, PRIBIO | PDROP, "m:w1", 1853155539Spjd timeout * hz); 1854156610Spjd sx_xlock(&sc->sc_lock); 1855155539Spjd G_MIRROR_DEBUG(5, "%s: I'm here 4.", __func__); 1856132904Spjd continue; 1857132904Spjd } 1858132904Spjd bioq_remove(&sc->sc_queue, bp); 1859132904Spjd mtx_unlock(&sc->sc_queue_mtx); 1860132904Spjd 1861162282Spjd if (bp->bio_from->geom == sc->sc_sync.ds_geom && 1862162282Spjd (bp->bio_cflags & G_MIRROR_BIO_FLAG_SYNC) != 0) { 1863162282Spjd g_mirror_sync_request(bp); /* READ */ 1864162282Spjd } else if (bp->bio_to != sc->sc_provider) { 1865161116Spjd if ((bp->bio_cflags & G_MIRROR_BIO_FLAG_REGULAR) != 0) 1866161116Spjd g_mirror_regular_request(bp); 1867161116Spjd else if ((bp->bio_cflags & G_MIRROR_BIO_FLAG_SYNC) != 0) 1868162282Spjd g_mirror_sync_request(bp); /* WRITE */ 1869161116Spjd else { 1870161116Spjd KASSERT(0, 1871161116Spjd ("Invalid request cflags=0x%hhx to=%s.", 1872161116Spjd bp->bio_cflags, bp->bio_to->name)); 1873161116Spjd } 1874161116Spjd } else { 1875132904Spjd g_mirror_register_request(bp); 1876161116Spjd } 1877139140Spjd G_MIRROR_DEBUG(5, "%s: I'm here 9.", __func__); 1878132904Spjd } 1879132904Spjd} 1880132904Spjd 1881132904Spjdstatic void 1882155539Spjdg_mirror_update_idle(struct g_mirror_softc *sc, struct g_mirror_disk *disk) 1883132904Spjd{ 1884132904Spjd 1885156610Spjd sx_assert(&sc->sc_lock, SX_LOCKED); 1886156610Spjd 1887163888Spjd if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_NOFAILSYNC) != 0) 1888163888Spjd return; 1889155539Spjd if (!sc->sc_idle && (disk->d_flags & G_MIRROR_DISK_FLAG_DIRTY) == 0) { 1890155539Spjd G_MIRROR_DEBUG(1, "Disk %s (device %s) marked as dirty.", 1891156610Spjd g_mirror_get_diskname(disk), sc->sc_name); 1892155539Spjd disk->d_flags |= G_MIRROR_DISK_FLAG_DIRTY; 1893155539Spjd } else if (sc->sc_idle && 1894155539Spjd (disk->d_flags & G_MIRROR_DISK_FLAG_DIRTY) != 0) { 1895155539Spjd G_MIRROR_DEBUG(1, "Disk %s (device %s) marked as clean.", 1896156610Spjd g_mirror_get_diskname(disk), sc->sc_name); 1897155539Spjd disk->d_flags &= ~G_MIRROR_DISK_FLAG_DIRTY; 1898132904Spjd } 1899132904Spjd} 1900132904Spjd 1901132904Spjdstatic void 1902132904Spjdg_mirror_sync_start(struct g_mirror_disk *disk) 1903132904Spjd{ 1904132904Spjd struct g_mirror_softc *sc; 1905156610Spjd struct g_consumer *cp; 1906156610Spjd struct bio *bp; 1907156610Spjd int error, i; 1908132904Spjd 1909156610Spjd g_topology_assert_not(); 1910156610Spjd sc = disk->d_softc; 1911156610Spjd sx_assert(&sc->sc_lock, SX_LOCKED); 1912132904Spjd 1913156610Spjd KASSERT(disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING, 1914156610Spjd ("Disk %s is not marked for synchronization.", 1915156610Spjd g_mirror_get_diskname(disk))); 1916132904Spjd KASSERT(sc->sc_state == G_MIRROR_DEVICE_STATE_RUNNING, 1917132904Spjd ("Device not in RUNNING state (%s, %u).", sc->sc_name, 1918132904Spjd sc->sc_state)); 1919132904Spjd 1920156610Spjd sx_xunlock(&sc->sc_lock); 1921156610Spjd g_topology_lock(); 1922156610Spjd cp = g_new_consumer(sc->sc_sync.ds_geom); 1923156610Spjd error = g_attach(cp, sc->sc_provider); 1924156610Spjd KASSERT(error == 0, 1925156610Spjd ("Cannot attach to %s (error=%d).", sc->sc_name, error)); 1926156610Spjd error = g_access(cp, 1, 0, 0); 1927156610Spjd KASSERT(error == 0, ("Cannot open %s (error=%d).", sc->sc_name, error)); 1928156610Spjd g_topology_unlock(); 1929156610Spjd sx_xlock(&sc->sc_lock); 1930156610Spjd 1931132904Spjd G_MIRROR_DEBUG(0, "Device %s: rebuilding provider %s.", sc->sc_name, 1932132904Spjd g_mirror_get_diskname(disk)); 1933163888Spjd if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_NOFAILSYNC) == 0) 1934163888Spjd disk->d_flags |= G_MIRROR_DISK_FLAG_DIRTY; 1935132904Spjd KASSERT(disk->d_sync.ds_consumer == NULL, 1936132904Spjd ("Sync consumer already exists (device=%s, disk=%s).", 1937132904Spjd sc->sc_name, g_mirror_get_diskname(disk))); 1938156610Spjd 1939156610Spjd disk->d_sync.ds_consumer = cp; 1940132904Spjd disk->d_sync.ds_consumer->private = disk; 1941137248Spjd disk->d_sync.ds_consumer->index = 0; 1942156610Spjd 1943156610Spjd /* 1944156610Spjd * Allocate memory for synchronization bios and initialize them. 1945156610Spjd */ 1946156610Spjd disk->d_sync.ds_bios = malloc(sizeof(struct bio *) * g_mirror_syncreqs, 1947156610Spjd M_MIRROR, M_WAITOK); 1948156610Spjd for (i = 0; i < g_mirror_syncreqs; i++) { 1949156610Spjd bp = g_alloc_bio(); 1950156610Spjd disk->d_sync.ds_bios[i] = bp; 1951156610Spjd bp->bio_parent = NULL; 1952156610Spjd bp->bio_cmd = BIO_READ; 1953156610Spjd bp->bio_data = malloc(MAXPHYS, M_MIRROR, M_WAITOK); 1954156610Spjd bp->bio_cflags = 0; 1955156610Spjd bp->bio_offset = disk->d_sync.ds_offset; 1956156610Spjd bp->bio_length = MIN(MAXPHYS, sc->sc_mediasize - bp->bio_offset); 1957156610Spjd disk->d_sync.ds_offset += bp->bio_length; 1958156610Spjd bp->bio_done = g_mirror_sync_done; 1959156610Spjd bp->bio_from = disk->d_sync.ds_consumer; 1960156610Spjd bp->bio_to = sc->sc_provider; 1961156684Sru bp->bio_caller1 = (void *)(uintptr_t)i; 1962156610Spjd } 1963156610Spjd 1964156610Spjd /* Increase the number of disks in SYNCHRONIZING state. */ 1965132904Spjd sc->sc_sync.ds_ndisks++; 1966156610Spjd /* Set the number of in-flight synchronization requests. */ 1967156610Spjd disk->d_sync.ds_inflight = g_mirror_syncreqs; 1968156610Spjd 1969156610Spjd /* 1970156610Spjd * Fire off first synchronization requests. 1971156610Spjd */ 1972156610Spjd for (i = 0; i < g_mirror_syncreqs; i++) { 1973156610Spjd bp = disk->d_sync.ds_bios[i]; 1974156610Spjd G_MIRROR_LOGREQ(3, bp, "Sending synchronization request."); 1975156610Spjd disk->d_sync.ds_consumer->index++; 1976156610Spjd /* 1977156610Spjd * Delay the request if it is colliding with a regular request. 1978156610Spjd */ 1979156610Spjd if (g_mirror_regular_collision(sc, bp)) 1980156610Spjd g_mirror_sync_delay(sc, bp); 1981156610Spjd else 1982156610Spjd g_io_request(bp, disk->d_sync.ds_consumer); 1983156610Spjd } 1984132904Spjd} 1985132904Spjd 1986132904Spjd/* 1987132904Spjd * Stop synchronization process. 1988132904Spjd * type: 0 - synchronization finished 1989132904Spjd * 1 - synchronization stopped 1990132904Spjd */ 1991132904Spjdstatic void 1992132904Spjdg_mirror_sync_stop(struct g_mirror_disk *disk, int type) 1993132904Spjd{ 1994156610Spjd struct g_mirror_softc *sc; 1995156610Spjd struct g_consumer *cp; 1996132904Spjd 1997156610Spjd g_topology_assert_not(); 1998156610Spjd sc = disk->d_softc; 1999156610Spjd sx_assert(&sc->sc_lock, SX_LOCKED); 2000156610Spjd 2001132904Spjd KASSERT(disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING, 2002132904Spjd ("Wrong disk state (%s, %s).", g_mirror_get_diskname(disk), 2003132904Spjd g_mirror_disk_state2str(disk->d_state))); 2004132904Spjd if (disk->d_sync.ds_consumer == NULL) 2005132904Spjd return; 2006132904Spjd 2007132904Spjd if (type == 0) { 2008132904Spjd G_MIRROR_DEBUG(0, "Device %s: rebuilding provider %s finished.", 2009156610Spjd sc->sc_name, g_mirror_get_diskname(disk)); 2010132904Spjd } else /* if (type == 1) */ { 2011132904Spjd G_MIRROR_DEBUG(0, "Device %s: rebuilding provider %s stopped.", 2012156610Spjd sc->sc_name, g_mirror_get_diskname(disk)); 2013132904Spjd } 2014156610Spjd free(disk->d_sync.ds_bios, M_MIRROR); 2015156610Spjd disk->d_sync.ds_bios = NULL; 2016156610Spjd cp = disk->d_sync.ds_consumer; 2017132904Spjd disk->d_sync.ds_consumer = NULL; 2018132904Spjd disk->d_flags &= ~G_MIRROR_DISK_FLAG_DIRTY; 2019156610Spjd sc->sc_sync.ds_ndisks--; 2020156610Spjd sx_xunlock(&sc->sc_lock); /* Avoid recursion on sc_lock. */ 2021156610Spjd g_topology_lock(); 2022156610Spjd g_mirror_kill_consumer(sc, cp); 2023156610Spjd g_topology_unlock(); 2024156610Spjd sx_xlock(&sc->sc_lock); 2025132904Spjd} 2026132904Spjd 2027132904Spjdstatic void 2028132904Spjdg_mirror_launch_provider(struct g_mirror_softc *sc) 2029132904Spjd{ 2030132904Spjd struct g_mirror_disk *disk; 2031252010Sscottl struct g_provider *pp, *dp; 2032132904Spjd 2033156610Spjd sx_assert(&sc->sc_lock, SX_LOCKED); 2034132904Spjd 2035156610Spjd g_topology_lock(); 2036132904Spjd pp = g_new_providerf(sc->sc_geom, "mirror/%s", sc->sc_name); 2037132904Spjd pp->mediasize = sc->sc_mediasize; 2038132904Spjd pp->sectorsize = sc->sc_sectorsize; 2039200935Smav pp->stripesize = 0; 2040200935Smav pp->stripeoffset = 0; 2041252010Sscottl 2042252010Sscottl /* Splitting of unmapped BIO's could work but isn't implemented now */ 2043252011Sscottl if (sc->sc_balance != G_MIRROR_BALANCE_SPLIT) 2044252010Sscottl pp->flags |= G_PF_ACCEPT_UNMAPPED; 2045252010Sscottl 2046200935Smav LIST_FOREACH(disk, &sc->sc_disks, d_next) { 2047252010Sscottl if (disk->d_consumer && disk->d_consumer->provider) { 2048252010Sscottl dp = disk->d_consumer->provider; 2049252010Sscottl if (dp->stripesize > pp->stripesize) { 2050252010Sscottl pp->stripesize = dp->stripesize; 2051252010Sscottl pp->stripeoffset = dp->stripeoffset; 2052252010Sscottl } 2053252010Sscottl /* A provider underneath us doesn't support unmapped */ 2054252010Sscottl if ((dp->flags & G_PF_ACCEPT_UNMAPPED) == 0) { 2055254252Sed G_MIRROR_DEBUG(0, "Cancelling unmapped " 2056254252Sed "because of %s.", dp->name); 2057252010Sscottl pp->flags &= ~G_PF_ACCEPT_UNMAPPED; 2058252010Sscottl } 2059200935Smav } 2060200935Smav } 2061132904Spjd sc->sc_provider = pp; 2062132904Spjd g_error_provider(pp, 0); 2063156610Spjd g_topology_unlock(); 2064162188Sjmg G_MIRROR_DEBUG(0, "Device %s launched (%u/%u).", pp->name, 2065162188Sjmg g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_ACTIVE), sc->sc_ndisks); 2066132904Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 2067132904Spjd if (disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING) 2068132904Spjd g_mirror_sync_start(disk); 2069132904Spjd } 2070132904Spjd} 2071132904Spjd 2072132904Spjdstatic void 2073132904Spjdg_mirror_destroy_provider(struct g_mirror_softc *sc) 2074132904Spjd{ 2075132904Spjd struct g_mirror_disk *disk; 2076132904Spjd struct bio *bp; 2077132904Spjd 2078156610Spjd g_topology_assert_not(); 2079132904Spjd KASSERT(sc->sc_provider != NULL, ("NULL provider (device=%s).", 2080132904Spjd sc->sc_name)); 2081132904Spjd 2082156610Spjd g_topology_lock(); 2083132904Spjd g_error_provider(sc->sc_provider, ENXIO); 2084132904Spjd mtx_lock(&sc->sc_queue_mtx); 2085132904Spjd while ((bp = bioq_first(&sc->sc_queue)) != NULL) { 2086132904Spjd bioq_remove(&sc->sc_queue, bp); 2087132904Spjd g_io_deliver(bp, ENXIO); 2088132904Spjd } 2089132904Spjd mtx_unlock(&sc->sc_queue_mtx); 2090132904Spjd G_MIRROR_DEBUG(0, "Device %s: provider %s destroyed.", sc->sc_name, 2091132904Spjd sc->sc_provider->name); 2092132904Spjd sc->sc_provider->flags |= G_PF_WITHER; 2093132904Spjd g_orphan_provider(sc->sc_provider, ENXIO); 2094156610Spjd g_topology_unlock(); 2095132904Spjd sc->sc_provider = NULL; 2096132904Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 2097132904Spjd if (disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING) 2098132904Spjd g_mirror_sync_stop(disk, 1); 2099132904Spjd } 2100132904Spjd} 2101132904Spjd 2102132904Spjdstatic void 2103132904Spjdg_mirror_go(void *arg) 2104132904Spjd{ 2105132904Spjd struct g_mirror_softc *sc; 2106132904Spjd 2107132904Spjd sc = arg; 2108132904Spjd G_MIRROR_DEBUG(0, "Force device %s start due to timeout.", sc->sc_name); 2109132904Spjd g_mirror_event_send(sc, 0, 2110132904Spjd G_MIRROR_EVENT_DONTWAIT | G_MIRROR_EVENT_DEVICE); 2111132904Spjd} 2112132904Spjd 2113132904Spjdstatic u_int 2114132904Spjdg_mirror_determine_state(struct g_mirror_disk *disk) 2115132904Spjd{ 2116132904Spjd struct g_mirror_softc *sc; 2117132904Spjd u_int state; 2118132904Spjd 2119132904Spjd sc = disk->d_softc; 2120132904Spjd if (sc->sc_syncid == disk->d_sync.ds_syncid) { 2121132904Spjd if ((disk->d_flags & 2122132904Spjd G_MIRROR_DISK_FLAG_SYNCHRONIZING) == 0) { 2123132904Spjd /* Disk does not need synchronization. */ 2124132904Spjd state = G_MIRROR_DISK_STATE_ACTIVE; 2125132904Spjd } else { 2126132904Spjd if ((sc->sc_flags & 2127156873Spjd G_MIRROR_DEVICE_FLAG_NOAUTOSYNC) == 0 || 2128132904Spjd (disk->d_flags & 2129132904Spjd G_MIRROR_DISK_FLAG_FORCE_SYNC) != 0) { 2130132904Spjd /* 2131132904Spjd * We can start synchronization from 2132132904Spjd * the stored offset. 2133132904Spjd */ 2134132904Spjd state = G_MIRROR_DISK_STATE_SYNCHRONIZING; 2135132904Spjd } else { 2136132904Spjd state = G_MIRROR_DISK_STATE_STALE; 2137132904Spjd } 2138132904Spjd } 2139132904Spjd } else if (disk->d_sync.ds_syncid < sc->sc_syncid) { 2140132904Spjd /* 2141132904Spjd * Reset all synchronization data for this disk, 2142132904Spjd * because if it even was synchronized, it was 2143132904Spjd * synchronized to disks with different syncid. 2144132904Spjd */ 2145132904Spjd disk->d_flags |= G_MIRROR_DISK_FLAG_SYNCHRONIZING; 2146132904Spjd disk->d_sync.ds_offset = 0; 2147132904Spjd disk->d_sync.ds_offset_done = 0; 2148132904Spjd disk->d_sync.ds_syncid = sc->sc_syncid; 2149132904Spjd if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_NOAUTOSYNC) == 0 || 2150132904Spjd (disk->d_flags & G_MIRROR_DISK_FLAG_FORCE_SYNC) != 0) { 2151132904Spjd state = G_MIRROR_DISK_STATE_SYNCHRONIZING; 2152132904Spjd } else { 2153132904Spjd state = G_MIRROR_DISK_STATE_STALE; 2154132904Spjd } 2155132904Spjd } else /* if (sc->sc_syncid < disk->d_sync.ds_syncid) */ { 2156132904Spjd /* 2157132904Spjd * Not good, NOT GOOD! 2158132904Spjd * It means that mirror was started on stale disks 2159132904Spjd * and more fresh disk just arrive. 2160160895Spjd * If there were writes, mirror is broken, sorry. 2161132904Spjd * I think the best choice here is don't touch 2162160964Syar * this disk and inform the user loudly. 2163132904Spjd */ 2164132904Spjd G_MIRROR_DEBUG(0, "Device %s was started before the freshest " 2165132904Spjd "disk (%s) arrives!! It will not be connected to the " 2166132904Spjd "running device.", sc->sc_name, 2167132904Spjd g_mirror_get_diskname(disk)); 2168132904Spjd g_mirror_destroy_disk(disk); 2169132904Spjd state = G_MIRROR_DISK_STATE_NONE; 2170132904Spjd /* Return immediately, because disk was destroyed. */ 2171132904Spjd return (state); 2172132904Spjd } 2173132904Spjd G_MIRROR_DEBUG(3, "State for %s disk: %s.", 2174132904Spjd g_mirror_get_diskname(disk), g_mirror_disk_state2str(state)); 2175132904Spjd return (state); 2176132904Spjd} 2177132904Spjd 2178132904Spjd/* 2179132904Spjd * Update device state. 2180132904Spjd */ 2181132904Spjdstatic void 2182139051Spjdg_mirror_update_device(struct g_mirror_softc *sc, boolean_t force) 2183132904Spjd{ 2184132904Spjd struct g_mirror_disk *disk; 2185132904Spjd u_int state; 2186132904Spjd 2187156610Spjd sx_assert(&sc->sc_lock, SX_XLOCKED); 2188132904Spjd 2189132904Spjd switch (sc->sc_state) { 2190132904Spjd case G_MIRROR_DEVICE_STATE_STARTING: 2191132904Spjd { 2192139213Spjd struct g_mirror_disk *pdisk, *tdisk; 2193139213Spjd u_int dirty, ndisks, genid, syncid; 2194132904Spjd 2195132904Spjd KASSERT(sc->sc_provider == NULL, 2196132904Spjd ("Non-NULL provider in STARTING state (%s).", sc->sc_name)); 2197132904Spjd /* 2198132904Spjd * Are we ready? We are, if all disks are connected or 2199132904Spjd * if we have any disks and 'force' is true. 2200132904Spjd */ 2201156610Spjd ndisks = g_mirror_ndisks(sc, -1); 2202157290Spjd if (sc->sc_ndisks == ndisks || (force && ndisks > 0)) { 2203132904Spjd ; 2204156610Spjd } else if (ndisks == 0) { 2205132904Spjd /* 2206132904Spjd * Disks went down in starting phase, so destroy 2207132904Spjd * device. 2208132904Spjd */ 2209146616Spjd callout_drain(&sc->sc_callout); 2210146616Spjd sc->sc_flags |= G_MIRROR_DEVICE_FLAG_DESTROY; 2211146616Spjd G_MIRROR_DEBUG(1, "root_mount_rel[%u] %p", __LINE__, 2212146616Spjd sc->sc_rootmount); 2213145305Spjd root_mount_rel(sc->sc_rootmount); 2214145305Spjd sc->sc_rootmount = NULL; 2215132904Spjd return; 2216132904Spjd } else { 2217132904Spjd return; 2218132904Spjd } 2219132904Spjd 2220132904Spjd /* 2221132904Spjd * Activate all disks with the biggest syncid. 2222132904Spjd */ 2223132904Spjd if (force) { 2224132904Spjd /* 2225133079Spjd * If 'force' is true, we have been called due to 2226133079Spjd * timeout, so don't bother canceling timeout. 2227132904Spjd */ 2228132904Spjd ndisks = 0; 2229132904Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 2230132904Spjd if ((disk->d_flags & 2231132904Spjd G_MIRROR_DISK_FLAG_SYNCHRONIZING) == 0) { 2232132904Spjd ndisks++; 2233132904Spjd } 2234132904Spjd } 2235132904Spjd if (ndisks == 0) { 2236132941Spjd /* No valid disks found, destroy device. */ 2237132941Spjd sc->sc_flags |= G_MIRROR_DEVICE_FLAG_DESTROY; 2238146616Spjd G_MIRROR_DEBUG(1, "root_mount_rel[%u] %p", 2239146616Spjd __LINE__, sc->sc_rootmount); 2240146616Spjd root_mount_rel(sc->sc_rootmount); 2241146616Spjd sc->sc_rootmount = NULL; 2242132904Spjd return; 2243132904Spjd } 2244132904Spjd } else { 2245132904Spjd /* Cancel timeout. */ 2246132904Spjd callout_drain(&sc->sc_callout); 2247132904Spjd } 2248132904Spjd 2249132904Spjd /* 2250139213Spjd * Find the biggest genid. 2251132904Spjd */ 2252139213Spjd genid = 0; 2253139213Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 2254139213Spjd if (disk->d_genid > genid) 2255139213Spjd genid = disk->d_genid; 2256139213Spjd } 2257139213Spjd sc->sc_genid = genid; 2258139213Spjd /* 2259139213Spjd * Remove all disks without the biggest genid. 2260139213Spjd */ 2261139213Spjd LIST_FOREACH_SAFE(disk, &sc->sc_disks, d_next, tdisk) { 2262139213Spjd if (disk->d_genid < genid) { 2263139213Spjd G_MIRROR_DEBUG(0, 2264139213Spjd "Component %s (device %s) broken, skipping.", 2265139213Spjd g_mirror_get_diskname(disk), sc->sc_name); 2266139213Spjd g_mirror_destroy_disk(disk); 2267139213Spjd } 2268139213Spjd } 2269139213Spjd 2270139213Spjd /* 2271139213Spjd * Find the biggest syncid. 2272139213Spjd */ 2273132904Spjd syncid = 0; 2274132904Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 2275132904Spjd if (disk->d_sync.ds_syncid > syncid) 2276132904Spjd syncid = disk->d_sync.ds_syncid; 2277132904Spjd } 2278132904Spjd 2279132904Spjd /* 2280132904Spjd * Here we need to look for dirty disks and if all disks 2281132904Spjd * with the biggest syncid are dirty, we have to choose 2282132904Spjd * one with the biggest priority and rebuild the rest. 2283132904Spjd */ 2284132904Spjd /* 2285132904Spjd * Find the number of dirty disks with the biggest syncid. 2286132904Spjd * Find the number of disks with the biggest syncid. 2287132904Spjd * While here, find a disk with the biggest priority. 2288132904Spjd */ 2289132904Spjd dirty = ndisks = 0; 2290132904Spjd pdisk = NULL; 2291132904Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 2292132904Spjd if (disk->d_sync.ds_syncid != syncid) 2293132904Spjd continue; 2294132904Spjd if ((disk->d_flags & 2295132904Spjd G_MIRROR_DISK_FLAG_SYNCHRONIZING) != 0) { 2296132904Spjd continue; 2297132904Spjd } 2298132904Spjd ndisks++; 2299132904Spjd if ((disk->d_flags & G_MIRROR_DISK_FLAG_DIRTY) != 0) { 2300132904Spjd dirty++; 2301132904Spjd if (pdisk == NULL || 2302132904Spjd pdisk->d_priority < disk->d_priority) { 2303132904Spjd pdisk = disk; 2304132904Spjd } 2305132904Spjd } 2306132904Spjd } 2307132904Spjd if (dirty == 0) { 2308132904Spjd /* No dirty disks at all, great. */ 2309132904Spjd } else if (dirty == ndisks) { 2310132904Spjd /* 2311132904Spjd * Force synchronization for all dirty disks except one 2312132904Spjd * with the biggest priority. 2313132904Spjd */ 2314132904Spjd KASSERT(pdisk != NULL, ("pdisk == NULL")); 2315132904Spjd G_MIRROR_DEBUG(1, "Using disk %s (device %s) as a " 2316132904Spjd "master disk for synchronization.", 2317132904Spjd g_mirror_get_diskname(pdisk), sc->sc_name); 2318132904Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 2319132904Spjd if (disk->d_sync.ds_syncid != syncid) 2320132904Spjd continue; 2321132904Spjd if ((disk->d_flags & 2322132904Spjd G_MIRROR_DISK_FLAG_SYNCHRONIZING) != 0) { 2323132904Spjd continue; 2324132904Spjd } 2325132904Spjd KASSERT((disk->d_flags & 2326132904Spjd G_MIRROR_DISK_FLAG_DIRTY) != 0, 2327132904Spjd ("Disk %s isn't marked as dirty.", 2328132904Spjd g_mirror_get_diskname(disk))); 2329132904Spjd /* Skip the disk with the biggest priority. */ 2330132904Spjd if (disk == pdisk) 2331132904Spjd continue; 2332132904Spjd disk->d_sync.ds_syncid = 0; 2333132904Spjd } 2334132904Spjd } else if (dirty < ndisks) { 2335132904Spjd /* 2336132904Spjd * Force synchronization for all dirty disks. 2337132904Spjd * We have some non-dirty disks. 2338132904Spjd */ 2339132904Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 2340132904Spjd if (disk->d_sync.ds_syncid != syncid) 2341132904Spjd continue; 2342132904Spjd if ((disk->d_flags & 2343132904Spjd G_MIRROR_DISK_FLAG_SYNCHRONIZING) != 0) { 2344132904Spjd continue; 2345132904Spjd } 2346132904Spjd if ((disk->d_flags & 2347132904Spjd G_MIRROR_DISK_FLAG_DIRTY) == 0) { 2348132904Spjd continue; 2349132904Spjd } 2350132904Spjd disk->d_sync.ds_syncid = 0; 2351132904Spjd } 2352132904Spjd } 2353132904Spjd 2354132904Spjd /* Reset hint. */ 2355132904Spjd sc->sc_hint = NULL; 2356132904Spjd sc->sc_syncid = syncid; 2357132904Spjd if (force) { 2358132904Spjd /* Remember to bump syncid on first write. */ 2359139670Spjd sc->sc_bump_id |= G_MIRROR_BUMP_SYNCID; 2360132904Spjd } 2361132904Spjd state = G_MIRROR_DEVICE_STATE_RUNNING; 2362132904Spjd G_MIRROR_DEBUG(1, "Device %s state changed from %s to %s.", 2363132904Spjd sc->sc_name, g_mirror_device_state2str(sc->sc_state), 2364132904Spjd g_mirror_device_state2str(state)); 2365132904Spjd sc->sc_state = state; 2366132904Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 2367132904Spjd state = g_mirror_determine_state(disk); 2368132904Spjd g_mirror_event_send(disk, state, 2369132904Spjd G_MIRROR_EVENT_DONTWAIT); 2370139213Spjd if (state == G_MIRROR_DISK_STATE_STALE) 2371139670Spjd sc->sc_bump_id |= G_MIRROR_BUMP_SYNCID; 2372132904Spjd } 2373132904Spjd break; 2374132904Spjd } 2375132904Spjd case G_MIRROR_DEVICE_STATE_RUNNING: 2376137248Spjd if (g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_ACTIVE) == 0 && 2377132904Spjd g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_NEW) == 0) { 2378132904Spjd /* 2379137248Spjd * No active disks or no disks at all, 2380137248Spjd * so destroy device. 2381132904Spjd */ 2382132904Spjd if (sc->sc_provider != NULL) 2383132904Spjd g_mirror_destroy_provider(sc); 2384137248Spjd sc->sc_flags |= G_MIRROR_DEVICE_FLAG_DESTROY; 2385133946Spjd break; 2386132904Spjd } else if (g_mirror_ndisks(sc, 2387132954Spjd G_MIRROR_DISK_STATE_ACTIVE) > 0 && 2388132954Spjd g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_NEW) == 0) { 2389132904Spjd /* 2390132904Spjd * We have active disks, launch provider if it doesn't 2391132904Spjd * exist. 2392132904Spjd */ 2393132904Spjd if (sc->sc_provider == NULL) 2394132904Spjd g_mirror_launch_provider(sc); 2395146624Spjd if (sc->sc_rootmount != NULL) { 2396146624Spjd G_MIRROR_DEBUG(1, "root_mount_rel[%u] %p", 2397146624Spjd __LINE__, sc->sc_rootmount); 2398146624Spjd root_mount_rel(sc->sc_rootmount); 2399146624Spjd sc->sc_rootmount = NULL; 2400146624Spjd } 2401132904Spjd } 2402133946Spjd /* 2403139670Spjd * Genid should be bumped immediately, so do it here. 2404133946Spjd */ 2405139670Spjd if ((sc->sc_bump_id & G_MIRROR_BUMP_GENID) != 0) { 2406139213Spjd sc->sc_bump_id &= ~G_MIRROR_BUMP_GENID; 2407139213Spjd g_mirror_bump_genid(sc); 2408139213Spjd } 2409132904Spjd break; 2410132904Spjd default: 2411132904Spjd KASSERT(1 == 0, ("Wrong device state (%s, %s).", 2412132904Spjd sc->sc_name, g_mirror_device_state2str(sc->sc_state))); 2413132904Spjd break; 2414132904Spjd } 2415132904Spjd} 2416132904Spjd 2417132904Spjd/* 2418132904Spjd * Update disk state and device state if needed. 2419132904Spjd */ 2420132904Spjd#define DISK_STATE_CHANGED() G_MIRROR_DEBUG(1, \ 2421132904Spjd "Disk %s state changed from %s to %s (device %s).", \ 2422132904Spjd g_mirror_get_diskname(disk), \ 2423132904Spjd g_mirror_disk_state2str(disk->d_state), \ 2424132904Spjd g_mirror_disk_state2str(state), sc->sc_name) 2425132904Spjdstatic int 2426139051Spjdg_mirror_update_disk(struct g_mirror_disk *disk, u_int state) 2427132904Spjd{ 2428132904Spjd struct g_mirror_softc *sc; 2429132904Spjd 2430156610Spjd sc = disk->d_softc; 2431156610Spjd sx_assert(&sc->sc_lock, SX_XLOCKED); 2432132904Spjd 2433132904Spjdagain: 2434132904Spjd G_MIRROR_DEBUG(3, "Changing disk %s state from %s to %s.", 2435132904Spjd g_mirror_get_diskname(disk), g_mirror_disk_state2str(disk->d_state), 2436132904Spjd g_mirror_disk_state2str(state)); 2437132904Spjd switch (state) { 2438132904Spjd case G_MIRROR_DISK_STATE_NEW: 2439132904Spjd /* 2440132904Spjd * Possible scenarios: 2441132904Spjd * 1. New disk arrive. 2442132904Spjd */ 2443132904Spjd /* Previous state should be NONE. */ 2444132904Spjd KASSERT(disk->d_state == G_MIRROR_DISK_STATE_NONE, 2445132904Spjd ("Wrong disk state (%s, %s).", g_mirror_get_diskname(disk), 2446132904Spjd g_mirror_disk_state2str(disk->d_state))); 2447132904Spjd DISK_STATE_CHANGED(); 2448132904Spjd 2449132904Spjd disk->d_state = state; 2450133115Spjd if (LIST_EMPTY(&sc->sc_disks)) 2451133115Spjd LIST_INSERT_HEAD(&sc->sc_disks, disk, d_next); 2452133115Spjd else { 2453133115Spjd struct g_mirror_disk *dp; 2454133115Spjd 2455133115Spjd LIST_FOREACH(dp, &sc->sc_disks, d_next) { 2456133115Spjd if (disk->d_priority >= dp->d_priority) { 2457133115Spjd LIST_INSERT_BEFORE(dp, disk, d_next); 2458133115Spjd dp = NULL; 2459133115Spjd break; 2460133115Spjd } 2461133115Spjd if (LIST_NEXT(dp, d_next) == NULL) 2462133115Spjd break; 2463133115Spjd } 2464133115Spjd if (dp != NULL) 2465133115Spjd LIST_INSERT_AFTER(dp, disk, d_next); 2466133115Spjd } 2467162188Sjmg G_MIRROR_DEBUG(1, "Device %s: provider %s detected.", 2468132904Spjd sc->sc_name, g_mirror_get_diskname(disk)); 2469132904Spjd if (sc->sc_state == G_MIRROR_DEVICE_STATE_STARTING) 2470132904Spjd break; 2471132904Spjd KASSERT(sc->sc_state == G_MIRROR_DEVICE_STATE_RUNNING, 2472132904Spjd ("Wrong device state (%s, %s, %s, %s).", sc->sc_name, 2473132904Spjd g_mirror_device_state2str(sc->sc_state), 2474132904Spjd g_mirror_get_diskname(disk), 2475132904Spjd g_mirror_disk_state2str(disk->d_state))); 2476132904Spjd state = g_mirror_determine_state(disk); 2477132904Spjd if (state != G_MIRROR_DISK_STATE_NONE) 2478132904Spjd goto again; 2479132904Spjd break; 2480132904Spjd case G_MIRROR_DISK_STATE_ACTIVE: 2481132904Spjd /* 2482132904Spjd * Possible scenarios: 2483132904Spjd * 1. New disk does not need synchronization. 2484132904Spjd * 2. Synchronization process finished successfully. 2485132904Spjd */ 2486132904Spjd KASSERT(sc->sc_state == G_MIRROR_DEVICE_STATE_RUNNING, 2487132904Spjd ("Wrong device state (%s, %s, %s, %s).", sc->sc_name, 2488132904Spjd g_mirror_device_state2str(sc->sc_state), 2489132904Spjd g_mirror_get_diskname(disk), 2490132904Spjd g_mirror_disk_state2str(disk->d_state))); 2491132904Spjd /* Previous state should be NEW or SYNCHRONIZING. */ 2492132904Spjd KASSERT(disk->d_state == G_MIRROR_DISK_STATE_NEW || 2493132904Spjd disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING, 2494132904Spjd ("Wrong disk state (%s, %s).", g_mirror_get_diskname(disk), 2495132904Spjd g_mirror_disk_state2str(disk->d_state))); 2496132904Spjd DISK_STATE_CHANGED(); 2497132904Spjd 2498155582Spjd if (disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING) { 2499132904Spjd disk->d_flags &= ~G_MIRROR_DISK_FLAG_SYNCHRONIZING; 2500132904Spjd disk->d_flags &= ~G_MIRROR_DISK_FLAG_FORCE_SYNC; 2501132904Spjd g_mirror_sync_stop(disk, 0); 2502132904Spjd } 2503132904Spjd disk->d_state = state; 2504132904Spjd disk->d_sync.ds_offset = 0; 2505132904Spjd disk->d_sync.ds_offset_done = 0; 2506155539Spjd g_mirror_update_idle(sc, disk); 2507155582Spjd g_mirror_update_metadata(disk); 2508162188Sjmg G_MIRROR_DEBUG(1, "Device %s: provider %s activated.", 2509132904Spjd sc->sc_name, g_mirror_get_diskname(disk)); 2510132904Spjd break; 2511132904Spjd case G_MIRROR_DISK_STATE_STALE: 2512132904Spjd /* 2513132904Spjd * Possible scenarios: 2514132904Spjd * 1. Stale disk was connected. 2515132904Spjd */ 2516132904Spjd /* Previous state should be NEW. */ 2517132904Spjd KASSERT(disk->d_state == G_MIRROR_DISK_STATE_NEW, 2518132904Spjd ("Wrong disk state (%s, %s).", g_mirror_get_diskname(disk), 2519132904Spjd g_mirror_disk_state2str(disk->d_state))); 2520132904Spjd KASSERT(sc->sc_state == G_MIRROR_DEVICE_STATE_RUNNING, 2521132904Spjd ("Wrong device state (%s, %s, %s, %s).", sc->sc_name, 2522132904Spjd g_mirror_device_state2str(sc->sc_state), 2523132904Spjd g_mirror_get_diskname(disk), 2524132904Spjd g_mirror_disk_state2str(disk->d_state))); 2525132904Spjd /* 2526132904Spjd * STALE state is only possible if device is marked 2527132904Spjd * NOAUTOSYNC. 2528132904Spjd */ 2529132904Spjd KASSERT((sc->sc_flags & G_MIRROR_DEVICE_FLAG_NOAUTOSYNC) != 0, 2530132904Spjd ("Wrong device state (%s, %s, %s, %s).", sc->sc_name, 2531132904Spjd g_mirror_device_state2str(sc->sc_state), 2532132904Spjd g_mirror_get_diskname(disk), 2533132904Spjd g_mirror_disk_state2str(disk->d_state))); 2534132904Spjd DISK_STATE_CHANGED(); 2535132904Spjd 2536132904Spjd disk->d_flags &= ~G_MIRROR_DISK_FLAG_DIRTY; 2537132904Spjd disk->d_state = state; 2538132904Spjd g_mirror_update_metadata(disk); 2539132904Spjd G_MIRROR_DEBUG(0, "Device %s: provider %s is stale.", 2540132904Spjd sc->sc_name, g_mirror_get_diskname(disk)); 2541132904Spjd break; 2542132904Spjd case G_MIRROR_DISK_STATE_SYNCHRONIZING: 2543132904Spjd /* 2544132904Spjd * Possible scenarios: 2545132904Spjd * 1. Disk which needs synchronization was connected. 2546132904Spjd */ 2547132904Spjd /* Previous state should be NEW. */ 2548132904Spjd KASSERT(disk->d_state == G_MIRROR_DISK_STATE_NEW, 2549132904Spjd ("Wrong disk state (%s, %s).", g_mirror_get_diskname(disk), 2550132904Spjd g_mirror_disk_state2str(disk->d_state))); 2551132904Spjd KASSERT(sc->sc_state == G_MIRROR_DEVICE_STATE_RUNNING, 2552132904Spjd ("Wrong device state (%s, %s, %s, %s).", sc->sc_name, 2553132904Spjd g_mirror_device_state2str(sc->sc_state), 2554132904Spjd g_mirror_get_diskname(disk), 2555132904Spjd g_mirror_disk_state2str(disk->d_state))); 2556132904Spjd DISK_STATE_CHANGED(); 2557132904Spjd 2558132904Spjd if (disk->d_state == G_MIRROR_DISK_STATE_NEW) 2559132904Spjd disk->d_flags &= ~G_MIRROR_DISK_FLAG_DIRTY; 2560132904Spjd disk->d_state = state; 2561132904Spjd if (sc->sc_provider != NULL) { 2562132904Spjd g_mirror_sync_start(disk); 2563132904Spjd g_mirror_update_metadata(disk); 2564132904Spjd } 2565132904Spjd break; 2566132904Spjd case G_MIRROR_DISK_STATE_DISCONNECTED: 2567132904Spjd /* 2568132904Spjd * Possible scenarios: 2569132904Spjd * 1. Device wasn't running yet, but disk disappear. 2570132904Spjd * 2. Disk was active and disapppear. 2571132904Spjd * 3. Disk disappear during synchronization process. 2572132904Spjd */ 2573132904Spjd if (sc->sc_state == G_MIRROR_DEVICE_STATE_RUNNING) { 2574132904Spjd /* 2575132904Spjd * Previous state should be ACTIVE, STALE or 2576132904Spjd * SYNCHRONIZING. 2577132904Spjd */ 2578132904Spjd KASSERT(disk->d_state == G_MIRROR_DISK_STATE_ACTIVE || 2579132904Spjd disk->d_state == G_MIRROR_DISK_STATE_STALE || 2580132904Spjd disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING, 2581132904Spjd ("Wrong disk state (%s, %s).", 2582132904Spjd g_mirror_get_diskname(disk), 2583132904Spjd g_mirror_disk_state2str(disk->d_state))); 2584132904Spjd } else if (sc->sc_state == G_MIRROR_DEVICE_STATE_STARTING) { 2585132904Spjd /* Previous state should be NEW. */ 2586132904Spjd KASSERT(disk->d_state == G_MIRROR_DISK_STATE_NEW, 2587132904Spjd ("Wrong disk state (%s, %s).", 2588132904Spjd g_mirror_get_diskname(disk), 2589132904Spjd g_mirror_disk_state2str(disk->d_state))); 2590132904Spjd /* 2591132904Spjd * Reset bumping syncid if disk disappeared in STARTING 2592132904Spjd * state. 2593132904Spjd */ 2594139670Spjd if ((sc->sc_bump_id & G_MIRROR_BUMP_SYNCID) != 0) 2595139213Spjd sc->sc_bump_id &= ~G_MIRROR_BUMP_SYNCID; 2596132904Spjd#ifdef INVARIANTS 2597132904Spjd } else { 2598132904Spjd KASSERT(1 == 0, ("Wrong device state (%s, %s, %s, %s).", 2599132904Spjd sc->sc_name, 2600132904Spjd g_mirror_device_state2str(sc->sc_state), 2601132904Spjd g_mirror_get_diskname(disk), 2602132904Spjd g_mirror_disk_state2str(disk->d_state))); 2603132904Spjd#endif 2604132904Spjd } 2605132904Spjd DISK_STATE_CHANGED(); 2606132904Spjd G_MIRROR_DEBUG(0, "Device %s: provider %s disconnected.", 2607132904Spjd sc->sc_name, g_mirror_get_diskname(disk)); 2608132904Spjd 2609132904Spjd g_mirror_destroy_disk(disk); 2610132904Spjd break; 2611132904Spjd case G_MIRROR_DISK_STATE_DESTROY: 2612132904Spjd { 2613132904Spjd int error; 2614132904Spjd 2615132904Spjd error = g_mirror_clear_metadata(disk); 2616132904Spjd if (error != 0) 2617132904Spjd return (error); 2618132904Spjd DISK_STATE_CHANGED(); 2619132904Spjd G_MIRROR_DEBUG(0, "Device %s: provider %s destroyed.", 2620132904Spjd sc->sc_name, g_mirror_get_diskname(disk)); 2621132904Spjd 2622132904Spjd g_mirror_destroy_disk(disk); 2623132904Spjd sc->sc_ndisks--; 2624132904Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 2625132904Spjd g_mirror_update_metadata(disk); 2626132904Spjd } 2627132904Spjd break; 2628132904Spjd } 2629132904Spjd default: 2630132904Spjd KASSERT(1 == 0, ("Unknown state (%u).", state)); 2631132904Spjd break; 2632132904Spjd } 2633132904Spjd return (0); 2634132904Spjd} 2635132904Spjd#undef DISK_STATE_CHANGED 2636132904Spjd 2637139650Spjdint 2638132904Spjdg_mirror_read_metadata(struct g_consumer *cp, struct g_mirror_metadata *md) 2639132904Spjd{ 2640132904Spjd struct g_provider *pp; 2641132904Spjd u_char *buf; 2642132904Spjd int error; 2643132904Spjd 2644132904Spjd g_topology_assert(); 2645132904Spjd 2646132904Spjd error = g_access(cp, 1, 0, 0); 2647132904Spjd if (error != 0) 2648132904Spjd return (error); 2649132904Spjd pp = cp->provider; 2650132904Spjd g_topology_unlock(); 2651132904Spjd /* Metadata are stored on last sector. */ 2652132904Spjd buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize, 2653132904Spjd &error); 2654132904Spjd g_topology_lock(); 2655139051Spjd g_access(cp, -1, 0, 0); 2656152967Ssobomax if (buf == NULL) { 2657139213Spjd G_MIRROR_DEBUG(1, "Cannot read metadata from %s (error=%d).", 2658139213Spjd cp->provider->name, error); 2659132904Spjd return (error); 2660132904Spjd } 2661132904Spjd 2662132904Spjd /* Decode metadata. */ 2663132904Spjd error = mirror_metadata_decode(buf, md); 2664132904Spjd g_free(buf); 2665132904Spjd if (strcmp(md->md_magic, G_MIRROR_MAGIC) != 0) 2666132904Spjd return (EINVAL); 2667139213Spjd if (md->md_version > G_MIRROR_VERSION) { 2668139213Spjd G_MIRROR_DEBUG(0, 2669139213Spjd "Kernel module is too old to handle metadata from %s.", 2670139213Spjd cp->provider->name); 2671139213Spjd return (EINVAL); 2672139213Spjd } 2673132904Spjd if (error != 0) { 2674132904Spjd G_MIRROR_DEBUG(1, "MD5 metadata hash mismatch for provider %s.", 2675132904Spjd cp->provider->name); 2676132904Spjd return (error); 2677132904Spjd } 2678132904Spjd 2679132904Spjd return (0); 2680132904Spjd} 2681132904Spjd 2682132904Spjdstatic int 2683132904Spjdg_mirror_check_metadata(struct g_mirror_softc *sc, struct g_provider *pp, 2684132904Spjd struct g_mirror_metadata *md) 2685132904Spjd{ 2686132904Spjd 2687132904Spjd if (g_mirror_id2disk(sc, md->md_did) != NULL) { 2688132904Spjd G_MIRROR_DEBUG(1, "Disk %s (id=%u) already exists, skipping.", 2689132904Spjd pp->name, md->md_did); 2690132904Spjd return (EEXIST); 2691132904Spjd } 2692132904Spjd if (md->md_all != sc->sc_ndisks) { 2693132904Spjd G_MIRROR_DEBUG(1, 2694132904Spjd "Invalid '%s' field on disk %s (device %s), skipping.", 2695132904Spjd "md_all", pp->name, sc->sc_name); 2696132904Spjd return (EINVAL); 2697132904Spjd } 2698132904Spjd if (md->md_slice != sc->sc_slice) { 2699132904Spjd G_MIRROR_DEBUG(1, 2700132904Spjd "Invalid '%s' field on disk %s (device %s), skipping.", 2701132904Spjd "md_slice", pp->name, sc->sc_name); 2702132904Spjd return (EINVAL); 2703132904Spjd } 2704132904Spjd if (md->md_balance != sc->sc_balance) { 2705132904Spjd G_MIRROR_DEBUG(1, 2706132904Spjd "Invalid '%s' field on disk %s (device %s), skipping.", 2707132904Spjd "md_balance", pp->name, sc->sc_name); 2708132904Spjd return (EINVAL); 2709132904Spjd } 2710132904Spjd if (md->md_mediasize != sc->sc_mediasize) { 2711132904Spjd G_MIRROR_DEBUG(1, 2712132904Spjd "Invalid '%s' field on disk %s (device %s), skipping.", 2713132904Spjd "md_mediasize", pp->name, sc->sc_name); 2714132904Spjd return (EINVAL); 2715132904Spjd } 2716132904Spjd if (sc->sc_mediasize > pp->mediasize) { 2717132904Spjd G_MIRROR_DEBUG(1, 2718132904Spjd "Invalid size of disk %s (device %s), skipping.", pp->name, 2719132904Spjd sc->sc_name); 2720132904Spjd return (EINVAL); 2721132904Spjd } 2722132904Spjd if (md->md_sectorsize != sc->sc_sectorsize) { 2723132904Spjd G_MIRROR_DEBUG(1, 2724132904Spjd "Invalid '%s' field on disk %s (device %s), skipping.", 2725132904Spjd "md_sectorsize", pp->name, sc->sc_name); 2726132904Spjd return (EINVAL); 2727132904Spjd } 2728132904Spjd if ((sc->sc_sectorsize % pp->sectorsize) != 0) { 2729132904Spjd G_MIRROR_DEBUG(1, 2730132904Spjd "Invalid sector size of disk %s (device %s), skipping.", 2731132904Spjd pp->name, sc->sc_name); 2732132904Spjd return (EINVAL); 2733132904Spjd } 2734132904Spjd if ((md->md_mflags & ~G_MIRROR_DEVICE_FLAG_MASK) != 0) { 2735132904Spjd G_MIRROR_DEBUG(1, 2736132904Spjd "Invalid device flags on disk %s (device %s), skipping.", 2737132904Spjd pp->name, sc->sc_name); 2738132904Spjd return (EINVAL); 2739132904Spjd } 2740132904Spjd if ((md->md_dflags & ~G_MIRROR_DISK_FLAG_MASK) != 0) { 2741132904Spjd G_MIRROR_DEBUG(1, 2742132904Spjd "Invalid disk flags on disk %s (device %s), skipping.", 2743132904Spjd pp->name, sc->sc_name); 2744132904Spjd return (EINVAL); 2745132904Spjd } 2746132904Spjd return (0); 2747132904Spjd} 2748132904Spjd 2749139650Spjdint 2750132904Spjdg_mirror_add_disk(struct g_mirror_softc *sc, struct g_provider *pp, 2751132904Spjd struct g_mirror_metadata *md) 2752132904Spjd{ 2753132904Spjd struct g_mirror_disk *disk; 2754132904Spjd int error; 2755132904Spjd 2756156610Spjd g_topology_assert_not(); 2757132904Spjd G_MIRROR_DEBUG(2, "Adding disk %s.", pp->name); 2758132904Spjd 2759132904Spjd error = g_mirror_check_metadata(sc, pp, md); 2760132904Spjd if (error != 0) 2761132904Spjd return (error); 2762139213Spjd if (sc->sc_state == G_MIRROR_DEVICE_STATE_RUNNING && 2763139213Spjd md->md_genid < sc->sc_genid) { 2764139213Spjd G_MIRROR_DEBUG(0, "Component %s (device %s) broken, skipping.", 2765139213Spjd pp->name, sc->sc_name); 2766139213Spjd return (EINVAL); 2767139213Spjd } 2768132904Spjd disk = g_mirror_init_disk(sc, pp, md, &error); 2769132904Spjd if (disk == NULL) 2770132904Spjd return (error); 2771132904Spjd error = g_mirror_event_send(disk, G_MIRROR_DISK_STATE_NEW, 2772132904Spjd G_MIRROR_EVENT_WAIT); 2773139213Spjd if (error != 0) 2774139213Spjd return (error); 2775139213Spjd if (md->md_version < G_MIRROR_VERSION) { 2776139213Spjd G_MIRROR_DEBUG(0, "Upgrading metadata on %s (v%d->v%d).", 2777139213Spjd pp->name, md->md_version, G_MIRROR_VERSION); 2778139213Spjd g_mirror_update_metadata(disk); 2779139213Spjd } 2780139213Spjd return (0); 2781132904Spjd} 2782132904Spjd 2783157630Spjdstatic void 2784157630Spjdg_mirror_destroy_delayed(void *arg, int flag) 2785157630Spjd{ 2786157630Spjd struct g_mirror_softc *sc; 2787157630Spjd int error; 2788157630Spjd 2789157630Spjd if (flag == EV_CANCEL) { 2790157630Spjd G_MIRROR_DEBUG(1, "Destroying canceled."); 2791157630Spjd return; 2792157630Spjd } 2793157630Spjd sc = arg; 2794157630Spjd g_topology_unlock(); 2795157630Spjd sx_xlock(&sc->sc_lock); 2796157630Spjd KASSERT((sc->sc_flags & G_MIRROR_DEVICE_FLAG_DESTROY) == 0, 2797157630Spjd ("DESTROY flag set on %s.", sc->sc_name)); 2798157630Spjd KASSERT((sc->sc_flags & G_MIRROR_DEVICE_FLAG_DESTROYING) != 0, 2799157630Spjd ("DESTROYING flag not set on %s.", sc->sc_name)); 2800157630Spjd G_MIRROR_DEBUG(1, "Destroying %s (delayed).", sc->sc_name); 2801157630Spjd error = g_mirror_destroy(sc, G_MIRROR_DESTROY_SOFT); 2802157630Spjd if (error != 0) { 2803157630Spjd G_MIRROR_DEBUG(0, "Cannot destroy %s.", sc->sc_name); 2804157630Spjd sx_xunlock(&sc->sc_lock); 2805157630Spjd } 2806157630Spjd g_topology_lock(); 2807157630Spjd} 2808157630Spjd 2809132904Spjdstatic int 2810132904Spjdg_mirror_access(struct g_provider *pp, int acr, int acw, int ace) 2811132904Spjd{ 2812132904Spjd struct g_mirror_softc *sc; 2813157630Spjd int dcr, dcw, dce, error = 0; 2814132904Spjd 2815132904Spjd g_topology_assert(); 2816132904Spjd G_MIRROR_DEBUG(2, "Access request for %s: r%dw%de%d.", pp->name, acr, 2817132904Spjd acw, ace); 2818132904Spjd 2819160081Spjd sc = pp->geom->softc; 2820160081Spjd if (sc == NULL && acr <= 0 && acw <= 0 && ace <= 0) 2821160081Spjd return (0); 2822160081Spjd KASSERT(sc != NULL, ("NULL softc (provider=%s).", pp->name)); 2823160081Spjd 2824132904Spjd dcr = pp->acr + acr; 2825132904Spjd dcw = pp->acw + acw; 2826132904Spjd dce = pp->ace + ace; 2827132904Spjd 2828157630Spjd g_topology_unlock(); 2829157630Spjd sx_xlock(&sc->sc_lock); 2830157630Spjd if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_DESTROY) != 0 || 2831157630Spjd LIST_EMPTY(&sc->sc_disks)) { 2832157630Spjd if (acr > 0 || acw > 0 || ace > 0) 2833157630Spjd error = ENXIO; 2834157630Spjd goto end; 2835132904Spjd } 2836245443Smav if (dcw == 0) 2837156610Spjd g_mirror_idle(sc, dcw); 2838157630Spjd if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_DESTROYING) != 0) { 2839157630Spjd if (acr > 0 || acw > 0 || ace > 0) { 2840157630Spjd error = ENXIO; 2841157630Spjd goto end; 2842157630Spjd } 2843157630Spjd if (dcr == 0 && dcw == 0 && dce == 0) { 2844157630Spjd g_post_event(g_mirror_destroy_delayed, sc, M_WAITOK, 2845157630Spjd sc, NULL); 2846157630Spjd } 2847156610Spjd } 2848157630Spjdend: 2849157630Spjd sx_xunlock(&sc->sc_lock); 2850157630Spjd g_topology_lock(); 2851157630Spjd return (error); 2852132904Spjd} 2853132904Spjd 2854132904Spjdstatic struct g_geom * 2855132904Spjdg_mirror_create(struct g_class *mp, const struct g_mirror_metadata *md) 2856132904Spjd{ 2857132904Spjd struct g_mirror_softc *sc; 2858132904Spjd struct g_geom *gp; 2859132904Spjd int error, timeout; 2860132904Spjd 2861132904Spjd g_topology_assert(); 2862132904Spjd G_MIRROR_DEBUG(1, "Creating device %s (id=%u).", md->md_name, 2863132904Spjd md->md_mid); 2864132904Spjd 2865132904Spjd /* One disk is minimum. */ 2866132904Spjd if (md->md_all < 1) 2867132904Spjd return (NULL); 2868132904Spjd /* 2869132904Spjd * Action geom. 2870132904Spjd */ 2871132904Spjd gp = g_new_geomf(mp, "%s", md->md_name); 2872132904Spjd sc = malloc(sizeof(*sc), M_MIRROR, M_WAITOK | M_ZERO); 2873132904Spjd gp->start = g_mirror_start; 2874132904Spjd gp->orphan = g_mirror_orphan; 2875132904Spjd gp->access = g_mirror_access; 2876132904Spjd gp->dumpconf = g_mirror_dumpconf; 2877132904Spjd 2878132904Spjd sc->sc_id = md->md_mid; 2879132904Spjd sc->sc_slice = md->md_slice; 2880132904Spjd sc->sc_balance = md->md_balance; 2881132904Spjd sc->sc_mediasize = md->md_mediasize; 2882132904Spjd sc->sc_sectorsize = md->md_sectorsize; 2883132904Spjd sc->sc_ndisks = md->md_all; 2884132904Spjd sc->sc_flags = md->md_mflags; 2885139213Spjd sc->sc_bump_id = 0; 2886155539Spjd sc->sc_idle = 1; 2887155581Spjd sc->sc_last_write = time_uptime; 2888155539Spjd sc->sc_writes = 0; 2889156610Spjd sx_init(&sc->sc_lock, "gmirror:lock"); 2890132904Spjd bioq_init(&sc->sc_queue); 2891132904Spjd mtx_init(&sc->sc_queue_mtx, "gmirror:queue", NULL, MTX_DEF); 2892156610Spjd bioq_init(&sc->sc_regular_delayed); 2893156610Spjd bioq_init(&sc->sc_inflight); 2894156610Spjd bioq_init(&sc->sc_sync_delayed); 2895132904Spjd LIST_INIT(&sc->sc_disks); 2896132904Spjd TAILQ_INIT(&sc->sc_events); 2897132904Spjd mtx_init(&sc->sc_events_mtx, "gmirror:events", NULL, MTX_DEF); 2898132904Spjd callout_init(&sc->sc_callout, CALLOUT_MPSAFE); 2899132904Spjd sc->sc_state = G_MIRROR_DEVICE_STATE_STARTING; 2900132904Spjd gp->softc = sc; 2901132904Spjd sc->sc_geom = gp; 2902132904Spjd sc->sc_provider = NULL; 2903132904Spjd /* 2904132904Spjd * Synchronization geom. 2905132904Spjd */ 2906132904Spjd gp = g_new_geomf(mp, "%s.sync", md->md_name); 2907132904Spjd gp->softc = sc; 2908132904Spjd gp->orphan = g_mirror_orphan; 2909132904Spjd sc->sc_sync.ds_geom = gp; 2910132904Spjd sc->sc_sync.ds_ndisks = 0; 2911172836Sjulian error = kproc_create(g_mirror_worker, sc, &sc->sc_worker, 0, 0, 2912132904Spjd "g_mirror %s", md->md_name); 2913132904Spjd if (error != 0) { 2914132904Spjd G_MIRROR_DEBUG(1, "Cannot create kernel thread for %s.", 2915132904Spjd sc->sc_name); 2916132904Spjd g_destroy_geom(sc->sc_sync.ds_geom); 2917132904Spjd mtx_destroy(&sc->sc_events_mtx); 2918132904Spjd mtx_destroy(&sc->sc_queue_mtx); 2919156610Spjd sx_destroy(&sc->sc_lock); 2920132904Spjd g_destroy_geom(sc->sc_geom); 2921132904Spjd free(sc, M_MIRROR); 2922132904Spjd return (NULL); 2923132904Spjd } 2924132904Spjd 2925162188Sjmg G_MIRROR_DEBUG(1, "Device %s created (%u components, id=%u).", 2926162188Sjmg sc->sc_name, sc->sc_ndisks, sc->sc_id); 2927132904Spjd 2928190878Sthompsa sc->sc_rootmount = root_mount_hold("GMIRROR"); 2929146538Spjd G_MIRROR_DEBUG(1, "root_mount_hold %p", sc->sc_rootmount); 2930132904Spjd /* 2931132904Spjd * Run timeout. 2932132904Spjd */ 2933137251Spjd timeout = g_mirror_timeout * hz; 2934137251Spjd callout_reset(&sc->sc_callout, timeout, g_mirror_go, sc); 2935132904Spjd return (sc->sc_geom); 2936132904Spjd} 2937132904Spjd 2938132904Spjdint 2939157630Spjdg_mirror_destroy(struct g_mirror_softc *sc, int how) 2940132904Spjd{ 2941157630Spjd struct g_mirror_disk *disk; 2942132904Spjd struct g_provider *pp; 2943132904Spjd 2944156610Spjd g_topology_assert_not(); 2945132904Spjd if (sc == NULL) 2946132904Spjd return (ENXIO); 2947156610Spjd sx_assert(&sc->sc_lock, SX_XLOCKED); 2948156610Spjd 2949132904Spjd pp = sc->sc_provider; 2950132904Spjd if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) { 2951157630Spjd switch (how) { 2952157630Spjd case G_MIRROR_DESTROY_SOFT: 2953132904Spjd G_MIRROR_DEBUG(1, 2954132904Spjd "Device %s is still open (r%dw%de%d).", pp->name, 2955132904Spjd pp->acr, pp->acw, pp->ace); 2956132904Spjd return (EBUSY); 2957157630Spjd case G_MIRROR_DESTROY_DELAYED: 2958157630Spjd G_MIRROR_DEBUG(1, 2959157630Spjd "Device %s will be destroyed on last close.", 2960157630Spjd pp->name); 2961157630Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 2962157630Spjd if (disk->d_state == 2963157630Spjd G_MIRROR_DISK_STATE_SYNCHRONIZING) { 2964157630Spjd g_mirror_sync_stop(disk, 1); 2965157630Spjd } 2966157630Spjd } 2967157630Spjd sc->sc_flags |= G_MIRROR_DEVICE_FLAG_DESTROYING; 2968157630Spjd return (EBUSY); 2969157630Spjd case G_MIRROR_DESTROY_HARD: 2970157630Spjd G_MIRROR_DEBUG(1, "Device %s is still open, so it " 2971157630Spjd "can't be definitely removed.", pp->name); 2972132904Spjd } 2973132904Spjd } 2974132904Spjd 2975158112Spjd g_topology_lock(); 2976158112Spjd if (sc->sc_geom->softc == NULL) { 2977158112Spjd g_topology_unlock(); 2978158112Spjd return (0); 2979158112Spjd } 2980158112Spjd sc->sc_geom->softc = NULL; 2981158112Spjd sc->sc_sync.ds_geom->softc = NULL; 2982158112Spjd g_topology_unlock(); 2983158112Spjd 2984132904Spjd sc->sc_flags |= G_MIRROR_DEVICE_FLAG_DESTROY; 2985132904Spjd sc->sc_flags |= G_MIRROR_DEVICE_FLAG_WAIT; 2986132904Spjd G_MIRROR_DEBUG(4, "%s: Waking up %p.", __func__, sc); 2987156610Spjd sx_xunlock(&sc->sc_lock); 2988132904Spjd mtx_lock(&sc->sc_queue_mtx); 2989132904Spjd wakeup(sc); 2990132904Spjd mtx_unlock(&sc->sc_queue_mtx); 2991132904Spjd G_MIRROR_DEBUG(4, "%s: Sleeping %p.", __func__, &sc->sc_worker); 2992132904Spjd while (sc->sc_worker != NULL) 2993132904Spjd tsleep(&sc->sc_worker, PRIBIO, "m:destroy", hz / 5); 2994132904Spjd G_MIRROR_DEBUG(4, "%s: Woken up %p.", __func__, &sc->sc_worker); 2995156610Spjd sx_xlock(&sc->sc_lock); 2996132904Spjd g_mirror_destroy_device(sc); 2997132904Spjd free(sc, M_MIRROR); 2998132904Spjd return (0); 2999132904Spjd} 3000132904Spjd 3001132904Spjdstatic void 3002132904Spjdg_mirror_taste_orphan(struct g_consumer *cp) 3003132904Spjd{ 3004132904Spjd 3005132904Spjd KASSERT(1 == 0, ("%s called while tasting %s.", __func__, 3006132904Spjd cp->provider->name)); 3007132904Spjd} 3008132904Spjd 3009132904Spjdstatic struct g_geom * 3010132904Spjdg_mirror_taste(struct g_class *mp, struct g_provider *pp, int flags __unused) 3011132904Spjd{ 3012132904Spjd struct g_mirror_metadata md; 3013132904Spjd struct g_mirror_softc *sc; 3014132904Spjd struct g_consumer *cp; 3015132904Spjd struct g_geom *gp; 3016132904Spjd int error; 3017132904Spjd 3018132904Spjd g_topology_assert(); 3019132904Spjd g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name); 3020132904Spjd G_MIRROR_DEBUG(2, "Tasting %s.", pp->name); 3021132904Spjd 3022132904Spjd gp = g_new_geomf(mp, "mirror:taste"); 3023132904Spjd /* 3024132904Spjd * This orphan function should be never called. 3025132904Spjd */ 3026132904Spjd gp->orphan = g_mirror_taste_orphan; 3027132904Spjd cp = g_new_consumer(gp); 3028132904Spjd g_attach(cp, pp); 3029132904Spjd error = g_mirror_read_metadata(cp, &md); 3030132904Spjd g_detach(cp); 3031132904Spjd g_destroy_consumer(cp); 3032132904Spjd g_destroy_geom(gp); 3033132904Spjd if (error != 0) 3034132904Spjd return (NULL); 3035132904Spjd gp = NULL; 3036132904Spjd 3037221101Smav if (md.md_provider[0] != '\0' && 3038221101Smav !g_compare_names(md.md_provider, pp->name)) 3039133373Spjd return (NULL); 3040142727Spjd if (md.md_provsize != 0 && md.md_provsize != pp->mediasize) 3041142727Spjd return (NULL); 3042132904Spjd if ((md.md_dflags & G_MIRROR_DISK_FLAG_INACTIVE) != 0) { 3043132904Spjd G_MIRROR_DEBUG(0, 3044132904Spjd "Device %s: provider %s marked as inactive, skipping.", 3045132904Spjd md.md_name, pp->name); 3046132904Spjd return (NULL); 3047132904Spjd } 3048132904Spjd if (g_mirror_debug >= 2) 3049132904Spjd mirror_metadata_dump(&md); 3050132904Spjd 3051132904Spjd /* 3052132904Spjd * Let's check if device already exists. 3053132904Spjd */ 3054134486Spjd sc = NULL; 3055132904Spjd LIST_FOREACH(gp, &mp->geom, geom) { 3056132904Spjd sc = gp->softc; 3057132904Spjd if (sc == NULL) 3058132904Spjd continue; 3059132904Spjd if (sc->sc_sync.ds_geom == gp) 3060132904Spjd continue; 3061132904Spjd if (strcmp(md.md_name, sc->sc_name) != 0) 3062132904Spjd continue; 3063132904Spjd if (md.md_mid != sc->sc_id) { 3064132904Spjd G_MIRROR_DEBUG(0, "Device %s already configured.", 3065132904Spjd sc->sc_name); 3066132904Spjd return (NULL); 3067132904Spjd } 3068132904Spjd break; 3069132904Spjd } 3070132904Spjd if (gp == NULL) { 3071132904Spjd gp = g_mirror_create(mp, &md); 3072132904Spjd if (gp == NULL) { 3073132976Spjd G_MIRROR_DEBUG(0, "Cannot create device %s.", 3074132904Spjd md.md_name); 3075132904Spjd return (NULL); 3076132904Spjd } 3077132904Spjd sc = gp->softc; 3078132904Spjd } 3079132904Spjd G_MIRROR_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); 3080156610Spjd g_topology_unlock(); 3081156610Spjd sx_xlock(&sc->sc_lock); 3082235599Sae sc->sc_flags |= G_MIRROR_DEVICE_FLAG_TASTING; 3083132904Spjd error = g_mirror_add_disk(sc, pp, &md); 3084132904Spjd if (error != 0) { 3085132904Spjd G_MIRROR_DEBUG(0, "Cannot add disk %s to %s (error=%d).", 3086132904Spjd pp->name, gp->name, error); 3087156610Spjd if (LIST_EMPTY(&sc->sc_disks)) { 3088157630Spjd g_cancel_event(sc); 3089160248Spjd g_mirror_destroy(sc, G_MIRROR_DESTROY_HARD); 3090156610Spjd g_topology_lock(); 3091156610Spjd return (NULL); 3092156610Spjd } 3093156610Spjd gp = NULL; 3094132904Spjd } 3095235599Sae sc->sc_flags &= ~G_MIRROR_DEVICE_FLAG_TASTING; 3096235599Sae if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_DESTROY) != 0) { 3097235599Sae g_mirror_destroy(sc, G_MIRROR_DESTROY_HARD); 3098235599Sae g_topology_lock(); 3099235599Sae return (NULL); 3100235599Sae } 3101156610Spjd sx_xunlock(&sc->sc_lock); 3102156610Spjd g_topology_lock(); 3103132904Spjd return (gp); 3104132904Spjd} 3105132904Spjd 3106132904Spjdstatic int 3107132904Spjdg_mirror_destroy_geom(struct gctl_req *req __unused, 3108132904Spjd struct g_class *mp __unused, struct g_geom *gp) 3109132904Spjd{ 3110156610Spjd struct g_mirror_softc *sc; 3111156610Spjd int error; 3112132904Spjd 3113156610Spjd g_topology_unlock(); 3114156610Spjd sc = gp->softc; 3115156610Spjd sx_xlock(&sc->sc_lock); 3116157630Spjd g_cancel_event(sc); 3117160248Spjd error = g_mirror_destroy(gp->softc, G_MIRROR_DESTROY_SOFT); 3118156610Spjd if (error != 0) 3119156610Spjd sx_xunlock(&sc->sc_lock); 3120156610Spjd g_topology_lock(); 3121156610Spjd return (error); 3122132904Spjd} 3123132904Spjd 3124132904Spjdstatic void 3125132904Spjdg_mirror_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 3126132904Spjd struct g_consumer *cp, struct g_provider *pp) 3127132904Spjd{ 3128132904Spjd struct g_mirror_softc *sc; 3129132904Spjd 3130132904Spjd g_topology_assert(); 3131132904Spjd 3132132904Spjd sc = gp->softc; 3133132904Spjd if (sc == NULL) 3134132904Spjd return; 3135132904Spjd /* Skip synchronization geom. */ 3136132904Spjd if (gp == sc->sc_sync.ds_geom) 3137132904Spjd return; 3138132904Spjd if (pp != NULL) { 3139132904Spjd /* Nothing here. */ 3140132904Spjd } else if (cp != NULL) { 3141132904Spjd struct g_mirror_disk *disk; 3142132904Spjd 3143132904Spjd disk = cp->private; 3144132904Spjd if (disk == NULL) 3145132904Spjd return; 3146156610Spjd g_topology_unlock(); 3147156610Spjd sx_xlock(&sc->sc_lock); 3148132904Spjd sbuf_printf(sb, "%s<ID>%u</ID>\n", indent, (u_int)disk->d_id); 3149132904Spjd if (disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING) { 3150132904Spjd sbuf_printf(sb, "%s<Synchronized>", indent); 3151156610Spjd if (disk->d_sync.ds_offset == 0) 3152132904Spjd sbuf_printf(sb, "0%%"); 3153132904Spjd else { 3154132904Spjd sbuf_printf(sb, "%u%%", 3155156610Spjd (u_int)((disk->d_sync.ds_offset * 100) / 3156132904Spjd sc->sc_provider->mediasize)); 3157132904Spjd } 3158132904Spjd sbuf_printf(sb, "</Synchronized>\n"); 3159240371Sglebius if (disk->d_sync.ds_offset > 0) { 3160240371Sglebius sbuf_printf(sb, "%s<BytesSynced>%jd" 3161240371Sglebius "</BytesSynced>\n", indent, 3162240371Sglebius (intmax_t)disk->d_sync.ds_offset); 3163240371Sglebius } 3164132904Spjd } 3165132904Spjd sbuf_printf(sb, "%s<SyncID>%u</SyncID>\n", indent, 3166132904Spjd disk->d_sync.ds_syncid); 3167139213Spjd sbuf_printf(sb, "%s<GenID>%u</GenID>\n", indent, 3168139213Spjd disk->d_genid); 3169132904Spjd sbuf_printf(sb, "%s<Flags>", indent); 3170132904Spjd if (disk->d_flags == 0) 3171132904Spjd sbuf_printf(sb, "NONE"); 3172132904Spjd else { 3173132904Spjd int first = 1; 3174132904Spjd 3175133448Spjd#define ADD_FLAG(flag, name) do { \ 3176133448Spjd if ((disk->d_flags & (flag)) != 0) { \ 3177133448Spjd if (!first) \ 3178133448Spjd sbuf_printf(sb, ", "); \ 3179133448Spjd else \ 3180133448Spjd first = 0; \ 3181133448Spjd sbuf_printf(sb, name); \ 3182133448Spjd } \ 3183133448Spjd} while (0) 3184133448Spjd ADD_FLAG(G_MIRROR_DISK_FLAG_DIRTY, "DIRTY"); 3185133448Spjd ADD_FLAG(G_MIRROR_DISK_FLAG_HARDCODED, "HARDCODED"); 3186133448Spjd ADD_FLAG(G_MIRROR_DISK_FLAG_INACTIVE, "INACTIVE"); 3187133448Spjd ADD_FLAG(G_MIRROR_DISK_FLAG_SYNCHRONIZING, 3188133448Spjd "SYNCHRONIZING"); 3189133448Spjd ADD_FLAG(G_MIRROR_DISK_FLAG_FORCE_SYNC, "FORCE_SYNC"); 3190155545Spjd ADD_FLAG(G_MIRROR_DISK_FLAG_BROKEN, "BROKEN"); 3191133448Spjd#undef ADD_FLAG 3192132904Spjd } 3193132904Spjd sbuf_printf(sb, "</Flags>\n"); 3194132904Spjd sbuf_printf(sb, "%s<Priority>%u</Priority>\n", indent, 3195132907Spjd disk->d_priority); 3196132904Spjd sbuf_printf(sb, "%s<State>%s</State>\n", indent, 3197132904Spjd g_mirror_disk_state2str(disk->d_state)); 3198156610Spjd sx_xunlock(&sc->sc_lock); 3199156610Spjd g_topology_lock(); 3200132904Spjd } else { 3201156610Spjd g_topology_unlock(); 3202156610Spjd sx_xlock(&sc->sc_lock); 3203132904Spjd sbuf_printf(sb, "%s<ID>%u</ID>\n", indent, (u_int)sc->sc_id); 3204132904Spjd sbuf_printf(sb, "%s<SyncID>%u</SyncID>\n", indent, sc->sc_syncid); 3205139213Spjd sbuf_printf(sb, "%s<GenID>%u</GenID>\n", indent, sc->sc_genid); 3206132904Spjd sbuf_printf(sb, "%s<Flags>", indent); 3207132904Spjd if (sc->sc_flags == 0) 3208132904Spjd sbuf_printf(sb, "NONE"); 3209132904Spjd else { 3210132904Spjd int first = 1; 3211132904Spjd 3212133448Spjd#define ADD_FLAG(flag, name) do { \ 3213133448Spjd if ((sc->sc_flags & (flag)) != 0) { \ 3214133448Spjd if (!first) \ 3215133448Spjd sbuf_printf(sb, ", "); \ 3216133448Spjd else \ 3217133448Spjd first = 0; \ 3218133448Spjd sbuf_printf(sb, name); \ 3219133448Spjd } \ 3220133448Spjd} while (0) 3221163888Spjd ADD_FLAG(G_MIRROR_DEVICE_FLAG_NOFAILSYNC, "NOFAILSYNC"); 3222133448Spjd ADD_FLAG(G_MIRROR_DEVICE_FLAG_NOAUTOSYNC, "NOAUTOSYNC"); 3223133448Spjd#undef ADD_FLAG 3224132904Spjd } 3225132904Spjd sbuf_printf(sb, "</Flags>\n"); 3226132904Spjd sbuf_printf(sb, "%s<Slice>%u</Slice>\n", indent, 3227132904Spjd (u_int)sc->sc_slice); 3228132904Spjd sbuf_printf(sb, "%s<Balance>%s</Balance>\n", indent, 3229132904Spjd balance_name(sc->sc_balance)); 3230132904Spjd sbuf_printf(sb, "%s<Components>%u</Components>\n", indent, 3231132904Spjd sc->sc_ndisks); 3232134957Spjd sbuf_printf(sb, "%s<State>", indent); 3233134957Spjd if (sc->sc_state == G_MIRROR_DEVICE_STATE_STARTING) 3234134957Spjd sbuf_printf(sb, "%s", "STARTING"); 3235134957Spjd else if (sc->sc_ndisks == 3236134957Spjd g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_ACTIVE)) 3237134957Spjd sbuf_printf(sb, "%s", "COMPLETE"); 3238134957Spjd else 3239134957Spjd sbuf_printf(sb, "%s", "DEGRADED"); 3240134957Spjd sbuf_printf(sb, "</State>\n"); 3241156610Spjd sx_xunlock(&sc->sc_lock); 3242156610Spjd g_topology_lock(); 3243132904Spjd } 3244132904Spjd} 3245132904Spjd 3246137254Spjdstatic void 3247245443Smavg_mirror_shutdown_post_sync(void *arg, int howto) 3248137254Spjd{ 3249137254Spjd struct g_class *mp; 3250137254Spjd struct g_geom *gp, *gp2; 3251156610Spjd struct g_mirror_softc *sc; 3252157630Spjd int error; 3253137254Spjd 3254137254Spjd mp = arg; 3255137421Spjd DROP_GIANT(); 3256137254Spjd g_topology_lock(); 3257245443Smav g_mirror_shutdown = 1; 3258137254Spjd LIST_FOREACH_SAFE(gp, &mp->geom, geom, gp2) { 3259156610Spjd if ((sc = gp->softc) == NULL) 3260137254Spjd continue; 3261157630Spjd /* Skip synchronization geom. */ 3262157630Spjd if (gp == sc->sc_sync.ds_geom) 3263156610Spjd continue; 3264156610Spjd g_topology_unlock(); 3265156610Spjd sx_xlock(&sc->sc_lock); 3266245443Smav g_mirror_idle(sc, -1); 3267157630Spjd g_cancel_event(sc); 3268157630Spjd error = g_mirror_destroy(sc, G_MIRROR_DESTROY_DELAYED); 3269157630Spjd if (error != 0) 3270157630Spjd sx_xunlock(&sc->sc_lock); 3271156610Spjd g_topology_lock(); 3272156610Spjd } 3273156610Spjd g_topology_unlock(); 3274156610Spjd PICKUP_GIANT(); 3275137254Spjd} 3276137254Spjd 3277137254Spjdstatic void 3278137254Spjdg_mirror_init(struct g_class *mp) 3279137254Spjd{ 3280137254Spjd 3281245443Smav g_mirror_post_sync = EVENTHANDLER_REGISTER(shutdown_post_sync, 3282245443Smav g_mirror_shutdown_post_sync, mp, SHUTDOWN_PRI_FIRST); 3283245443Smav if (g_mirror_post_sync == NULL) 3284137254Spjd G_MIRROR_DEBUG(0, "Warning! Cannot register shutdown event."); 3285137254Spjd} 3286137254Spjd 3287137254Spjdstatic void 3288137254Spjdg_mirror_fini(struct g_class *mp) 3289137254Spjd{ 3290137254Spjd 3291245443Smav if (g_mirror_post_sync != NULL) 3292245443Smav EVENTHANDLER_DEREGISTER(shutdown_post_sync, g_mirror_post_sync); 3293137254Spjd} 3294137254Spjd 3295132904SpjdDECLARE_GEOM_CLASS(g_mirror_class, g_mirror); 3296