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); 54248085Smariusstatic SYSCTL_NODE(_kern_geom, OID_AUTO, mirror, CTLFLAG_RW, 0, 55248085Smarius "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 84246076Smavstatic eventhandler_tag g_mirror_post_sync = NULL; 85246076Smavstatic 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; 444238500Sglebius 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; 459238500Sglebius error = g_getattr("GEOM::candelete", disk->d_consumer, &i); 460246241Savg if (error == 0 && i != 0) 461238500Sglebius 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); 641260507Sae if (md != NULL && 642260507Sae (sc->sc_flags & G_MIRROR_DEVICE_FLAG_WIPE) == 0) 643139051Spjd mirror_metadata_encode(md, sector); 644139051Spjd error = g_write_data(cp, offset, sector, length); 645132904Spjd free(sector, M_MIRROR); 646132904Spjd if (error != 0) { 647155545Spjd if ((disk->d_flags & G_MIRROR_DISK_FLAG_BROKEN) == 0) { 648155545Spjd disk->d_flags |= G_MIRROR_DISK_FLAG_BROKEN; 649155545Spjd G_MIRROR_DEBUG(0, "Cannot write metadata on %s " 650155545Spjd "(device=%s, error=%d).", 651155545Spjd g_mirror_get_diskname(disk), sc->sc_name, error); 652155545Spjd } else { 653155545Spjd G_MIRROR_DEBUG(1, "Cannot write metadata on %s " 654155545Spjd "(device=%s, error=%d).", 655155545Spjd g_mirror_get_diskname(disk), sc->sc_name, error); 656155545Spjd } 657155545Spjd if (g_mirror_disconnect_on_failure && 658155545Spjd g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_ACTIVE) > 1) { 659155545Spjd sc->sc_bump_id |= G_MIRROR_BUMP_GENID; 660155545Spjd g_mirror_event_send(disk, 661155545Spjd G_MIRROR_DISK_STATE_DISCONNECTED, 662155545Spjd G_MIRROR_EVENT_DONTWAIT); 663155545Spjd } 664132904Spjd } 665133752Spjd return (error); 666132904Spjd} 667132904Spjd 668133752Spjdstatic int 669133752Spjdg_mirror_clear_metadata(struct g_mirror_disk *disk) 670133752Spjd{ 671133752Spjd int error; 672133752Spjd 673156610Spjd g_topology_assert_not(); 674156610Spjd sx_assert(&disk->d_softc->sc_lock, SX_LOCKED); 675156610Spjd 676133752Spjd error = g_mirror_write_metadata(disk, NULL); 677133752Spjd if (error == 0) { 678133752Spjd G_MIRROR_DEBUG(2, "Metadata on %s cleared.", 679133752Spjd g_mirror_get_diskname(disk)); 680133752Spjd } else { 681133752Spjd G_MIRROR_DEBUG(0, 682133752Spjd "Cannot clear metadata on disk %s (error=%d).", 683133752Spjd g_mirror_get_diskname(disk), error); 684133752Spjd } 685133752Spjd return (error); 686133752Spjd} 687133752Spjd 688132904Spjdvoid 689132904Spjdg_mirror_fill_metadata(struct g_mirror_softc *sc, struct g_mirror_disk *disk, 690132904Spjd struct g_mirror_metadata *md) 691132904Spjd{ 692132904Spjd 693132904Spjd strlcpy(md->md_magic, G_MIRROR_MAGIC, sizeof(md->md_magic)); 694132904Spjd md->md_version = G_MIRROR_VERSION; 695132904Spjd strlcpy(md->md_name, sc->sc_name, sizeof(md->md_name)); 696132904Spjd md->md_mid = sc->sc_id; 697132904Spjd md->md_all = sc->sc_ndisks; 698132904Spjd md->md_slice = sc->sc_slice; 699132904Spjd md->md_balance = sc->sc_balance; 700139213Spjd md->md_genid = sc->sc_genid; 701132904Spjd md->md_mediasize = sc->sc_mediasize; 702132904Spjd md->md_sectorsize = sc->sc_sectorsize; 703132904Spjd md->md_mflags = (sc->sc_flags & G_MIRROR_DEVICE_FLAG_MASK); 704133373Spjd bzero(md->md_provider, sizeof(md->md_provider)); 705132904Spjd if (disk == NULL) { 706132904Spjd md->md_did = arc4random(); 707132904Spjd md->md_priority = 0; 708132904Spjd md->md_syncid = 0; 709132904Spjd md->md_dflags = 0; 710132904Spjd md->md_sync_offset = 0; 711142727Spjd md->md_provsize = 0; 712132904Spjd } else { 713132904Spjd md->md_did = disk->d_id; 714132904Spjd md->md_priority = disk->d_priority; 715132904Spjd md->md_syncid = disk->d_sync.ds_syncid; 716132904Spjd md->md_dflags = (disk->d_flags & G_MIRROR_DISK_FLAG_MASK); 717132904Spjd if (disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING) 718132904Spjd md->md_sync_offset = disk->d_sync.ds_offset_done; 719132904Spjd else 720132904Spjd md->md_sync_offset = 0; 721133373Spjd if ((disk->d_flags & G_MIRROR_DISK_FLAG_HARDCODED) != 0) { 722133373Spjd strlcpy(md->md_provider, 723133373Spjd disk->d_consumer->provider->name, 724133373Spjd sizeof(md->md_provider)); 725133373Spjd } 726142727Spjd md->md_provsize = disk->d_consumer->provider->mediasize; 727132904Spjd } 728132904Spjd} 729132904Spjd 730132904Spjdvoid 731132904Spjdg_mirror_update_metadata(struct g_mirror_disk *disk) 732132904Spjd{ 733156610Spjd struct g_mirror_softc *sc; 734132904Spjd struct g_mirror_metadata md; 735133752Spjd int error; 736132904Spjd 737156610Spjd g_topology_assert_not(); 738156610Spjd sc = disk->d_softc; 739156610Spjd sx_assert(&sc->sc_lock, SX_LOCKED); 740156610Spjd 741260507Sae if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_WIPE) == 0) 742260507Sae g_mirror_fill_metadata(sc, disk, &md); 743133752Spjd error = g_mirror_write_metadata(disk, &md); 744133752Spjd if (error == 0) { 745133752Spjd G_MIRROR_DEBUG(2, "Metadata on %s updated.", 746133752Spjd g_mirror_get_diskname(disk)); 747132904Spjd } else { 748132904Spjd G_MIRROR_DEBUG(0, 749132904Spjd "Cannot update metadata on disk %s (error=%d).", 750132904Spjd g_mirror_get_diskname(disk), error); 751132904Spjd } 752132904Spjd} 753132904Spjd 754132904Spjdstatic void 755139051Spjdg_mirror_bump_syncid(struct g_mirror_softc *sc) 756132904Spjd{ 757132904Spjd struct g_mirror_disk *disk; 758132904Spjd 759156610Spjd g_topology_assert_not(); 760156610Spjd sx_assert(&sc->sc_lock, SX_XLOCKED); 761132904Spjd KASSERT(g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_ACTIVE) > 0, 762132904Spjd ("%s called with no active disks (device=%s).", __func__, 763132904Spjd sc->sc_name)); 764132904Spjd 765132904Spjd sc->sc_syncid++; 766132954Spjd G_MIRROR_DEBUG(1, "Device %s: syncid bumped to %u.", sc->sc_name, 767132954Spjd sc->sc_syncid); 768132904Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 769132904Spjd if (disk->d_state == G_MIRROR_DISK_STATE_ACTIVE || 770132904Spjd disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING) { 771132904Spjd disk->d_sync.ds_syncid = sc->sc_syncid; 772132904Spjd g_mirror_update_metadata(disk); 773132904Spjd } 774132904Spjd } 775132904Spjd} 776132904Spjd 777137248Spjdstatic void 778139213Spjdg_mirror_bump_genid(struct g_mirror_softc *sc) 779139213Spjd{ 780139213Spjd struct g_mirror_disk *disk; 781139213Spjd 782156610Spjd g_topology_assert_not(); 783156610Spjd sx_assert(&sc->sc_lock, SX_XLOCKED); 784139213Spjd KASSERT(g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_ACTIVE) > 0, 785139213Spjd ("%s called with no active disks (device=%s).", __func__, 786139213Spjd sc->sc_name)); 787139213Spjd 788139213Spjd sc->sc_genid++; 789139213Spjd G_MIRROR_DEBUG(1, "Device %s: genid bumped to %u.", sc->sc_name, 790139213Spjd sc->sc_genid); 791139213Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 792139213Spjd if (disk->d_state == G_MIRROR_DISK_STATE_ACTIVE || 793139213Spjd disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING) { 794139246Spjd disk->d_genid = sc->sc_genid; 795139213Spjd g_mirror_update_metadata(disk); 796139213Spjd } 797139213Spjd } 798139213Spjd} 799139213Spjd 800155539Spjdstatic int 801156610Spjdg_mirror_idle(struct g_mirror_softc *sc, int acw) 802137248Spjd{ 803137248Spjd struct g_mirror_disk *disk; 804155539Spjd int timeout; 805137248Spjd 806156610Spjd g_topology_assert_not(); 807156610Spjd sx_assert(&sc->sc_lock, SX_XLOCKED); 808156610Spjd 809155539Spjd if (sc->sc_provider == NULL) 810155539Spjd return (0); 811163888Spjd if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_NOFAILSYNC) != 0) 812163888Spjd return (0); 813155539Spjd if (sc->sc_idle) 814155539Spjd return (0); 815155539Spjd if (sc->sc_writes > 0) 816155539Spjd return (0); 817156610Spjd if (acw > 0 || (acw == -1 && sc->sc_provider->acw > 0)) { 818155581Spjd timeout = g_mirror_idletime - (time_uptime - sc->sc_last_write); 819246076Smav if (!g_mirror_shutdown && timeout > 0) 820155539Spjd return (timeout); 821155539Spjd } 822137248Spjd sc->sc_idle = 1; 823137248Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 824137248Spjd if (disk->d_state != G_MIRROR_DISK_STATE_ACTIVE) 825137248Spjd continue; 826137248Spjd G_MIRROR_DEBUG(1, "Disk %s (device %s) marked as clean.", 827137248Spjd g_mirror_get_diskname(disk), sc->sc_name); 828137248Spjd disk->d_flags &= ~G_MIRROR_DISK_FLAG_DIRTY; 829137248Spjd g_mirror_update_metadata(disk); 830137248Spjd } 831155539Spjd return (0); 832137248Spjd} 833137248Spjd 834137248Spjdstatic void 835137248Spjdg_mirror_unidle(struct g_mirror_softc *sc) 836137248Spjd{ 837137248Spjd struct g_mirror_disk *disk; 838137248Spjd 839156610Spjd g_topology_assert_not(); 840156610Spjd sx_assert(&sc->sc_lock, SX_XLOCKED); 841156610Spjd 842163888Spjd if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_NOFAILSYNC) != 0) 843163888Spjd return; 844137248Spjd sc->sc_idle = 0; 845155581Spjd sc->sc_last_write = time_uptime; 846137248Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 847137248Spjd if (disk->d_state != G_MIRROR_DISK_STATE_ACTIVE) 848137248Spjd continue; 849137248Spjd G_MIRROR_DEBUG(1, "Disk %s (device %s) marked as dirty.", 850137248Spjd g_mirror_get_diskname(disk), sc->sc_name); 851137248Spjd disk->d_flags |= G_MIRROR_DISK_FLAG_DIRTY; 852137248Spjd g_mirror_update_metadata(disk); 853137248Spjd } 854137248Spjd} 855137248Spjd 856132904Spjdstatic void 857132904Spjdg_mirror_done(struct bio *bp) 858132904Spjd{ 859132904Spjd struct g_mirror_softc *sc; 860132904Spjd 861132904Spjd sc = bp->bio_from->geom->softc; 862162282Spjd bp->bio_cflags = G_MIRROR_BIO_FLAG_REGULAR; 863132904Spjd mtx_lock(&sc->sc_queue_mtx); 864132904Spjd bioq_disksort(&sc->sc_queue, bp); 865201566Smav mtx_unlock(&sc->sc_queue_mtx); 866132904Spjd wakeup(sc); 867132904Spjd} 868132904Spjd 869132904Spjdstatic void 870132904Spjdg_mirror_regular_request(struct bio *bp) 871132904Spjd{ 872132904Spjd struct g_mirror_softc *sc; 873132904Spjd struct g_mirror_disk *disk; 874132904Spjd struct bio *pbp; 875132904Spjd 876132904Spjd g_topology_assert_not(); 877132904Spjd 878132904Spjd pbp = bp->bio_parent; 879132904Spjd sc = pbp->bio_to->geom->softc; 880155539Spjd bp->bio_from->index--; 881155539Spjd if (bp->bio_cmd == BIO_WRITE) 882155539Spjd sc->sc_writes--; 883132904Spjd disk = bp->bio_from->private; 884132904Spjd if (disk == NULL) { 885132904Spjd g_topology_lock(); 886132904Spjd g_mirror_kill_consumer(sc, bp->bio_from); 887132904Spjd g_topology_unlock(); 888132904Spjd } 889132904Spjd 890132904Spjd pbp->bio_inbed++; 891132904Spjd KASSERT(pbp->bio_inbed <= pbp->bio_children, 892132904Spjd ("bio_inbed (%u) is bigger than bio_children (%u).", pbp->bio_inbed, 893132904Spjd pbp->bio_children)); 894132904Spjd if (bp->bio_error == 0 && pbp->bio_error == 0) { 895132904Spjd G_MIRROR_LOGREQ(3, bp, "Request delivered."); 896132904Spjd g_destroy_bio(bp); 897132904Spjd if (pbp->bio_children == pbp->bio_inbed) { 898132904Spjd G_MIRROR_LOGREQ(3, pbp, "Request delivered."); 899132904Spjd pbp->bio_completed = pbp->bio_length; 900238500Sglebius if (pbp->bio_cmd == BIO_WRITE || 901238500Sglebius pbp->bio_cmd == BIO_DELETE) { 902156610Spjd bioq_remove(&sc->sc_inflight, pbp); 903156610Spjd /* Release delayed sync requests if possible. */ 904156610Spjd g_mirror_sync_release(sc); 905156610Spjd } 906132904Spjd g_io_deliver(pbp, pbp->bio_error); 907132904Spjd } 908132904Spjd return; 909132904Spjd } else if (bp->bio_error != 0) { 910132904Spjd if (pbp->bio_error == 0) 911132904Spjd pbp->bio_error = bp->bio_error; 912132904Spjd if (disk != NULL) { 913155545Spjd if ((disk->d_flags & G_MIRROR_DISK_FLAG_BROKEN) == 0) { 914155545Spjd disk->d_flags |= G_MIRROR_DISK_FLAG_BROKEN; 915155545Spjd G_MIRROR_LOGREQ(0, bp, 916155545Spjd "Request failed (error=%d).", 917155545Spjd bp->bio_error); 918155545Spjd } else { 919155545Spjd G_MIRROR_LOGREQ(1, bp, 920155545Spjd "Request failed (error=%d).", 921155545Spjd bp->bio_error); 922155545Spjd } 923155545Spjd if (g_mirror_disconnect_on_failure && 924155545Spjd g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_ACTIVE) > 1) 925155545Spjd { 926155545Spjd sc->sc_bump_id |= G_MIRROR_BUMP_GENID; 927155545Spjd g_mirror_event_send(disk, 928155545Spjd G_MIRROR_DISK_STATE_DISCONNECTED, 929155545Spjd G_MIRROR_EVENT_DONTWAIT); 930155545Spjd } 931132904Spjd } 932132904Spjd switch (pbp->bio_cmd) { 933132904Spjd case BIO_DELETE: 934132904Spjd case BIO_WRITE: 935132904Spjd pbp->bio_inbed--; 936132904Spjd pbp->bio_children--; 937132904Spjd break; 938132904Spjd } 939132904Spjd } 940132904Spjd g_destroy_bio(bp); 941132904Spjd 942132904Spjd switch (pbp->bio_cmd) { 943132904Spjd case BIO_READ: 944155545Spjd if (pbp->bio_inbed < pbp->bio_children) 945155545Spjd break; 946155545Spjd if (g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_ACTIVE) == 1) 947155545Spjd g_io_deliver(pbp, pbp->bio_error); 948155545Spjd else { 949132904Spjd pbp->bio_error = 0; 950132904Spjd mtx_lock(&sc->sc_queue_mtx); 951132904Spjd bioq_disksort(&sc->sc_queue, pbp); 952201566Smav mtx_unlock(&sc->sc_queue_mtx); 953132904Spjd G_MIRROR_DEBUG(4, "%s: Waking up %p.", __func__, sc); 954132904Spjd wakeup(sc); 955132904Spjd } 956132904Spjd break; 957132904Spjd case BIO_DELETE: 958132904Spjd case BIO_WRITE: 959132904Spjd if (pbp->bio_children == 0) { 960132904Spjd /* 961132904Spjd * All requests failed. 962132904Spjd */ 963132904Spjd } else if (pbp->bio_inbed < pbp->bio_children) { 964132904Spjd /* Do nothing. */ 965132904Spjd break; 966132904Spjd } else if (pbp->bio_children == pbp->bio_inbed) { 967132904Spjd /* Some requests succeeded. */ 968132904Spjd pbp->bio_error = 0; 969132904Spjd pbp->bio_completed = pbp->bio_length; 970132904Spjd } 971156610Spjd bioq_remove(&sc->sc_inflight, pbp); 972156610Spjd /* Release delayed sync requests if possible. */ 973156610Spjd g_mirror_sync_release(sc); 974132904Spjd g_io_deliver(pbp, pbp->bio_error); 975132904Spjd break; 976132904Spjd default: 977132904Spjd KASSERT(1 == 0, ("Invalid request: %u.", pbp->bio_cmd)); 978132904Spjd break; 979132904Spjd } 980132904Spjd} 981132904Spjd 982132904Spjdstatic void 983132904Spjdg_mirror_sync_done(struct bio *bp) 984132904Spjd{ 985132904Spjd struct g_mirror_softc *sc; 986132904Spjd 987132904Spjd G_MIRROR_LOGREQ(3, bp, "Synchronization request delivered."); 988132904Spjd sc = bp->bio_from->geom->softc; 989162282Spjd bp->bio_cflags = G_MIRROR_BIO_FLAG_SYNC; 990132904Spjd mtx_lock(&sc->sc_queue_mtx); 991132904Spjd bioq_disksort(&sc->sc_queue, bp); 992201566Smav mtx_unlock(&sc->sc_queue_mtx); 993132904Spjd wakeup(sc); 994132904Spjd} 995132904Spjd 996132904Spjdstatic void 997156421Spjdg_mirror_kernel_dump(struct bio *bp) 998156421Spjd{ 999156421Spjd struct g_mirror_softc *sc; 1000156421Spjd struct g_mirror_disk *disk; 1001156421Spjd struct bio *cbp; 1002156421Spjd struct g_kerneldump *gkd; 1003156421Spjd 1004156421Spjd /* 1005156421Spjd * We configure dumping to the first component, because this component 1006156421Spjd * will be used for reading with 'prefer' balance algorithm. 1007156421Spjd * If the component with the higest priority is currently disconnected 1008156421Spjd * we will not be able to read the dump after the reboot if it will be 1009156421Spjd * connected and synchronized later. Can we do something better? 1010156421Spjd */ 1011156421Spjd sc = bp->bio_to->geom->softc; 1012156421Spjd disk = LIST_FIRST(&sc->sc_disks); 1013156421Spjd 1014156421Spjd gkd = (struct g_kerneldump *)bp->bio_data; 1015156421Spjd if (gkd->length > bp->bio_to->mediasize) 1016156421Spjd gkd->length = bp->bio_to->mediasize; 1017156421Spjd cbp = g_clone_bio(bp); 1018156421Spjd if (cbp == NULL) { 1019156421Spjd g_io_deliver(bp, ENOMEM); 1020156421Spjd return; 1021156421Spjd } 1022156421Spjd cbp->bio_done = g_std_done; 1023156421Spjd g_io_request(cbp, disk->d_consumer); 1024156421Spjd G_MIRROR_DEBUG(1, "Kernel dump will go to %s.", 1025156421Spjd g_mirror_get_diskname(disk)); 1026156421Spjd} 1027156421Spjd 1028156421Spjdstatic void 1029163836Spjdg_mirror_flush(struct g_mirror_softc *sc, struct bio *bp) 1030163836Spjd{ 1031163836Spjd struct bio_queue_head queue; 1032163836Spjd struct g_mirror_disk *disk; 1033163836Spjd struct g_consumer *cp; 1034163836Spjd struct bio *cbp; 1035163836Spjd 1036163836Spjd bioq_init(&queue); 1037163836Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 1038163836Spjd if (disk->d_state != G_MIRROR_DISK_STATE_ACTIVE) 1039163836Spjd continue; 1040163836Spjd cbp = g_clone_bio(bp); 1041163836Spjd if (cbp == NULL) { 1042163836Spjd for (cbp = bioq_first(&queue); cbp != NULL; 1043163836Spjd cbp = bioq_first(&queue)) { 1044163836Spjd bioq_remove(&queue, cbp); 1045163836Spjd g_destroy_bio(cbp); 1046163836Spjd } 1047163836Spjd if (bp->bio_error == 0) 1048163836Spjd bp->bio_error = ENOMEM; 1049163836Spjd g_io_deliver(bp, bp->bio_error); 1050163836Spjd return; 1051163836Spjd } 1052163836Spjd bioq_insert_tail(&queue, cbp); 1053163836Spjd cbp->bio_done = g_std_done; 1054163836Spjd cbp->bio_caller1 = disk; 1055163836Spjd cbp->bio_to = disk->d_consumer->provider; 1056163836Spjd } 1057163836Spjd for (cbp = bioq_first(&queue); cbp != NULL; cbp = bioq_first(&queue)) { 1058163836Spjd bioq_remove(&queue, cbp); 1059163836Spjd G_MIRROR_LOGREQ(3, cbp, "Sending request."); 1060163836Spjd disk = cbp->bio_caller1; 1061163836Spjd cbp->bio_caller1 = NULL; 1062163836Spjd cp = disk->d_consumer; 1063163836Spjd KASSERT(cp->acr >= 1 && cp->acw >= 1 && cp->ace >= 1, 1064163836Spjd ("Consumer %s not opened (r%dw%de%d).", cp->provider->name, 1065163836Spjd cp->acr, cp->acw, cp->ace)); 1066163836Spjd g_io_request(cbp, disk->d_consumer); 1067163836Spjd } 1068163836Spjd} 1069163836Spjd 1070163836Spjdstatic void 1071132904Spjdg_mirror_start(struct bio *bp) 1072132904Spjd{ 1073132904Spjd struct g_mirror_softc *sc; 1074132904Spjd 1075132904Spjd sc = bp->bio_to->geom->softc; 1076132904Spjd /* 1077132904Spjd * If sc == NULL or there are no valid disks, provider's error 1078132904Spjd * should be set and g_mirror_start() should not be called at all. 1079132904Spjd */ 1080132904Spjd KASSERT(sc != NULL && sc->sc_state == G_MIRROR_DEVICE_STATE_RUNNING, 1081132904Spjd ("Provider's error should be set (error=%d)(mirror=%s).", 1082132904Spjd bp->bio_to->error, bp->bio_to->name)); 1083132904Spjd G_MIRROR_LOGREQ(3, bp, "Request received."); 1084132904Spjd 1085132904Spjd switch (bp->bio_cmd) { 1086132904Spjd case BIO_READ: 1087132904Spjd case BIO_WRITE: 1088132904Spjd case BIO_DELETE: 1089132904Spjd break; 1090163836Spjd case BIO_FLUSH: 1091163836Spjd g_mirror_flush(sc, bp); 1092163836Spjd return; 1093132904Spjd case BIO_GETATTR: 1094238500Sglebius if (g_handleattr_int(bp, "GEOM::candelete", 1)) 1095238500Sglebius return; 1096238500Sglebius else if (strcmp("GEOM::kerneldump", bp->bio_attribute) == 0) { 1097156421Spjd g_mirror_kernel_dump(bp); 1098156421Spjd return; 1099156421Spjd } 1100156421Spjd /* FALLTHROUGH */ 1101132904Spjd default: 1102132904Spjd g_io_deliver(bp, EOPNOTSUPP); 1103132904Spjd return; 1104132904Spjd } 1105132904Spjd mtx_lock(&sc->sc_queue_mtx); 1106132904Spjd bioq_disksort(&sc->sc_queue, bp); 1107201566Smav mtx_unlock(&sc->sc_queue_mtx); 1108132904Spjd G_MIRROR_DEBUG(4, "%s: Waking up %p.", __func__, sc); 1109132904Spjd wakeup(sc); 1110132904Spjd} 1111132904Spjd 1112132904Spjd/* 1113156610Spjd * Return TRUE if the given request is colliding with a in-progress 1114156610Spjd * synchronization request. 1115132904Spjd */ 1116156610Spjdstatic int 1117156610Spjdg_mirror_sync_collision(struct g_mirror_softc *sc, struct bio *bp) 1118132904Spjd{ 1119156610Spjd struct g_mirror_disk *disk; 1120156610Spjd struct bio *sbp; 1121156610Spjd off_t rstart, rend, sstart, send; 1122156610Spjd int i; 1123156610Spjd 1124156610Spjd if (sc->sc_sync.ds_ndisks == 0) 1125156610Spjd return (0); 1126156610Spjd rstart = bp->bio_offset; 1127156610Spjd rend = bp->bio_offset + bp->bio_length; 1128156610Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 1129156610Spjd if (disk->d_state != G_MIRROR_DISK_STATE_SYNCHRONIZING) 1130156610Spjd continue; 1131156610Spjd for (i = 0; i < g_mirror_syncreqs; i++) { 1132156610Spjd sbp = disk->d_sync.ds_bios[i]; 1133156610Spjd if (sbp == NULL) 1134156610Spjd continue; 1135156610Spjd sstart = sbp->bio_offset; 1136156610Spjd send = sbp->bio_offset + sbp->bio_length; 1137156610Spjd if (rend > sstart && rstart < send) 1138156610Spjd return (1); 1139156610Spjd } 1140156610Spjd } 1141156610Spjd return (0); 1142156610Spjd} 1143156610Spjd 1144156610Spjd/* 1145156610Spjd * Return TRUE if the given sync request is colliding with a in-progress regular 1146156610Spjd * request. 1147156610Spjd */ 1148156610Spjdstatic int 1149156610Spjdg_mirror_regular_collision(struct g_mirror_softc *sc, struct bio *sbp) 1150156610Spjd{ 1151156610Spjd off_t rstart, rend, sstart, send; 1152132904Spjd struct bio *bp; 1153132904Spjd 1154156610Spjd if (sc->sc_sync.ds_ndisks == 0) 1155156610Spjd return (0); 1156156610Spjd sstart = sbp->bio_offset; 1157156610Spjd send = sbp->bio_offset + sbp->bio_length; 1158156610Spjd TAILQ_FOREACH(bp, &sc->sc_inflight.queue, bio_queue) { 1159156610Spjd rstart = bp->bio_offset; 1160156610Spjd rend = bp->bio_offset + bp->bio_length; 1161156610Spjd if (rend > sstart && rstart < send) 1162156610Spjd return (1); 1163156610Spjd } 1164156610Spjd return (0); 1165156610Spjd} 1166132904Spjd 1167156610Spjd/* 1168156610Spjd * Puts request onto delayed queue. 1169156610Spjd */ 1170156610Spjdstatic void 1171156610Spjdg_mirror_regular_delay(struct g_mirror_softc *sc, struct bio *bp) 1172156610Spjd{ 1173156610Spjd 1174156610Spjd G_MIRROR_LOGREQ(2, bp, "Delaying request."); 1175156610Spjd bioq_insert_head(&sc->sc_regular_delayed, bp); 1176156610Spjd} 1177156610Spjd 1178156610Spjd/* 1179156610Spjd * Puts synchronization request onto delayed queue. 1180156610Spjd */ 1181156610Spjdstatic void 1182156610Spjdg_mirror_sync_delay(struct g_mirror_softc *sc, struct bio *bp) 1183156610Spjd{ 1184156610Spjd 1185156610Spjd G_MIRROR_LOGREQ(2, bp, "Delaying synchronization request."); 1186156610Spjd bioq_insert_tail(&sc->sc_sync_delayed, bp); 1187156610Spjd} 1188156610Spjd 1189156610Spjd/* 1190156610Spjd * Releases delayed regular requests which don't collide anymore with sync 1191156610Spjd * requests. 1192156610Spjd */ 1193156610Spjdstatic void 1194156610Spjdg_mirror_regular_release(struct g_mirror_softc *sc) 1195156610Spjd{ 1196156610Spjd struct bio *bp, *bp2; 1197156610Spjd 1198156610Spjd TAILQ_FOREACH_SAFE(bp, &sc->sc_regular_delayed.queue, bio_queue, bp2) { 1199156610Spjd if (g_mirror_sync_collision(sc, bp)) 1200156610Spjd continue; 1201156610Spjd bioq_remove(&sc->sc_regular_delayed, bp); 1202156610Spjd G_MIRROR_LOGREQ(2, bp, "Releasing delayed request (%p).", bp); 1203156610Spjd mtx_lock(&sc->sc_queue_mtx); 1204156610Spjd bioq_insert_head(&sc->sc_queue, bp); 1205156610Spjd#if 0 1206156610Spjd /* 1207156610Spjd * wakeup() is not needed, because this function is called from 1208156610Spjd * the worker thread. 1209156610Spjd */ 1210156610Spjd wakeup(&sc->sc_queue); 1211156610Spjd#endif 1212156610Spjd mtx_unlock(&sc->sc_queue_mtx); 1213132904Spjd } 1214132904Spjd} 1215132904Spjd 1216156610Spjd/* 1217156610Spjd * Releases delayed sync requests which don't collide anymore with regular 1218156610Spjd * requests. 1219156610Spjd */ 1220132904Spjdstatic void 1221156610Spjdg_mirror_sync_release(struct g_mirror_softc *sc) 1222156610Spjd{ 1223156610Spjd struct bio *bp, *bp2; 1224156610Spjd 1225156610Spjd TAILQ_FOREACH_SAFE(bp, &sc->sc_sync_delayed.queue, bio_queue, bp2) { 1226156610Spjd if (g_mirror_regular_collision(sc, bp)) 1227156610Spjd continue; 1228156610Spjd bioq_remove(&sc->sc_sync_delayed, bp); 1229156610Spjd G_MIRROR_LOGREQ(2, bp, 1230156610Spjd "Releasing delayed synchronization request."); 1231156610Spjd g_io_request(bp, bp->bio_from); 1232156610Spjd } 1233156610Spjd} 1234156610Spjd 1235156610Spjd/* 1236156610Spjd * Handle synchronization requests. 1237156610Spjd * Every synchronization request is two-steps process: first, READ request is 1238156610Spjd * send to active provider and then WRITE request (with read data) to the provider 1239156610Spjd * beeing synchronized. When WRITE is finished, new synchronization request is 1240156610Spjd * send. 1241156610Spjd */ 1242156610Spjdstatic void 1243132904Spjdg_mirror_sync_request(struct bio *bp) 1244132904Spjd{ 1245132904Spjd struct g_mirror_softc *sc; 1246132904Spjd struct g_mirror_disk *disk; 1247132904Spjd 1248137248Spjd bp->bio_from->index--; 1249132904Spjd sc = bp->bio_from->geom->softc; 1250132904Spjd disk = bp->bio_from->private; 1251132904Spjd if (disk == NULL) { 1252156610Spjd sx_xunlock(&sc->sc_lock); /* Avoid recursion on sc_lock. */ 1253132904Spjd g_topology_lock(); 1254132904Spjd g_mirror_kill_consumer(sc, bp->bio_from); 1255132904Spjd g_topology_unlock(); 1256156610Spjd free(bp->bio_data, M_MIRROR); 1257132904Spjd g_destroy_bio(bp); 1258156610Spjd sx_xlock(&sc->sc_lock); 1259132904Spjd return; 1260132904Spjd } 1261132904Spjd 1262132904Spjd /* 1263132904Spjd * Synchronization request. 1264132904Spjd */ 1265132904Spjd switch (bp->bio_cmd) { 1266132904Spjd case BIO_READ: 1267132904Spjd { 1268132904Spjd struct g_consumer *cp; 1269132904Spjd 1270132904Spjd if (bp->bio_error != 0) { 1271132904Spjd G_MIRROR_LOGREQ(0, bp, 1272132904Spjd "Synchronization request failed (error=%d).", 1273132904Spjd bp->bio_error); 1274132904Spjd g_destroy_bio(bp); 1275132904Spjd return; 1276132904Spjd } 1277137248Spjd G_MIRROR_LOGREQ(3, bp, 1278137248Spjd "Synchronization request half-finished."); 1279132904Spjd bp->bio_cmd = BIO_WRITE; 1280133142Spjd bp->bio_cflags = 0; 1281132904Spjd cp = disk->d_consumer; 1282156610Spjd KASSERT(cp->acr >= 1 && cp->acw >= 1 && cp->ace >= 1, 1283132904Spjd ("Consumer %s not opened (r%dw%de%d).", cp->provider->name, 1284132904Spjd cp->acr, cp->acw, cp->ace)); 1285137248Spjd cp->index++; 1286132904Spjd g_io_request(bp, cp); 1287132904Spjd return; 1288132904Spjd } 1289132904Spjd case BIO_WRITE: 1290135833Spjd { 1291135833Spjd struct g_mirror_disk_sync *sync; 1292156610Spjd off_t offset; 1293156610Spjd void *data; 1294156610Spjd int i; 1295135833Spjd 1296132904Spjd if (bp->bio_error != 0) { 1297132904Spjd G_MIRROR_LOGREQ(0, bp, 1298132904Spjd "Synchronization request failed (error=%d).", 1299132904Spjd bp->bio_error); 1300132904Spjd g_destroy_bio(bp); 1301139670Spjd sc->sc_bump_id |= G_MIRROR_BUMP_GENID; 1302132904Spjd g_mirror_event_send(disk, 1303132904Spjd G_MIRROR_DISK_STATE_DISCONNECTED, 1304132904Spjd G_MIRROR_EVENT_DONTWAIT); 1305132904Spjd return; 1306132904Spjd } 1307132904Spjd G_MIRROR_LOGREQ(3, bp, "Synchronization request finished."); 1308135833Spjd sync = &disk->d_sync; 1309156610Spjd if (sync->ds_offset == sc->sc_mediasize || 1310156610Spjd sync->ds_consumer == NULL || 1311156610Spjd (sc->sc_flags & G_MIRROR_DEVICE_FLAG_DESTROY) != 0) { 1312156610Spjd /* Don't send more synchronization requests. */ 1313156610Spjd sync->ds_inflight--; 1314156610Spjd if (sync->ds_bios != NULL) { 1315156684Sru i = (int)(uintptr_t)bp->bio_caller1; 1316156610Spjd sync->ds_bios[i] = NULL; 1317156610Spjd } 1318156610Spjd free(bp->bio_data, M_MIRROR); 1319156610Spjd g_destroy_bio(bp); 1320156610Spjd if (sync->ds_inflight > 0) 1321156610Spjd return; 1322156610Spjd if (sync->ds_consumer == NULL || 1323156610Spjd (sc->sc_flags & G_MIRROR_DEVICE_FLAG_DESTROY) != 0) { 1324156610Spjd return; 1325156610Spjd } 1326156610Spjd /* Disk up-to-date, activate it. */ 1327132904Spjd g_mirror_event_send(disk, G_MIRROR_DISK_STATE_ACTIVE, 1328132904Spjd G_MIRROR_EVENT_DONTWAIT); 1329132904Spjd return; 1330156610Spjd } 1331156610Spjd 1332156610Spjd /* Send next synchronization request. */ 1333156610Spjd data = bp->bio_data; 1334156610Spjd bzero(bp, sizeof(*bp)); 1335156610Spjd bp->bio_cmd = BIO_READ; 1336156610Spjd bp->bio_offset = sync->ds_offset; 1337156610Spjd bp->bio_length = MIN(MAXPHYS, sc->sc_mediasize - bp->bio_offset); 1338156610Spjd sync->ds_offset += bp->bio_length; 1339156610Spjd bp->bio_done = g_mirror_sync_done; 1340156610Spjd bp->bio_data = data; 1341156610Spjd bp->bio_from = sync->ds_consumer; 1342156610Spjd bp->bio_to = sc->sc_provider; 1343156610Spjd G_MIRROR_LOGREQ(3, bp, "Sending synchronization request."); 1344156610Spjd sync->ds_consumer->index++; 1345156610Spjd /* 1346156610Spjd * Delay the request if it is colliding with a regular request. 1347156610Spjd */ 1348156610Spjd if (g_mirror_regular_collision(sc, bp)) 1349156610Spjd g_mirror_sync_delay(sc, bp); 1350156610Spjd else 1351156610Spjd g_io_request(bp, sync->ds_consumer); 1352156610Spjd 1353156610Spjd /* Release delayed requests if possible. */ 1354156610Spjd g_mirror_regular_release(sc); 1355156610Spjd 1356156610Spjd /* Find the smallest offset */ 1357156610Spjd offset = sc->sc_mediasize; 1358156610Spjd for (i = 0; i < g_mirror_syncreqs; i++) { 1359156610Spjd bp = sync->ds_bios[i]; 1360156610Spjd if (bp->bio_offset < offset) 1361156610Spjd offset = bp->bio_offset; 1362156610Spjd } 1363156610Spjd if (sync->ds_offset_done + (MAXPHYS * 100) < offset) { 1364156610Spjd /* Update offset_done on every 100 blocks. */ 1365156610Spjd sync->ds_offset_done = offset; 1366132904Spjd g_mirror_update_metadata(disk); 1367132904Spjd } 1368132904Spjd return; 1369135833Spjd } 1370132904Spjd default: 1371132904Spjd KASSERT(1 == 0, ("Invalid command here: %u (device=%s)", 1372132904Spjd bp->bio_cmd, sc->sc_name)); 1373132904Spjd break; 1374132904Spjd } 1375132904Spjd} 1376132904Spjd 1377132904Spjdstatic void 1378133115Spjdg_mirror_request_prefer(struct g_mirror_softc *sc, struct bio *bp) 1379133115Spjd{ 1380133115Spjd struct g_mirror_disk *disk; 1381133115Spjd struct g_consumer *cp; 1382133115Spjd struct bio *cbp; 1383133115Spjd 1384133115Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 1385133115Spjd if (disk->d_state == G_MIRROR_DISK_STATE_ACTIVE) 1386133115Spjd break; 1387133115Spjd } 1388133115Spjd if (disk == NULL) { 1389133115Spjd if (bp->bio_error == 0) 1390133115Spjd bp->bio_error = ENXIO; 1391133115Spjd g_io_deliver(bp, bp->bio_error); 1392133115Spjd return; 1393133115Spjd } 1394133115Spjd cbp = g_clone_bio(bp); 1395133115Spjd if (cbp == NULL) { 1396133115Spjd if (bp->bio_error == 0) 1397133115Spjd bp->bio_error = ENOMEM; 1398133115Spjd g_io_deliver(bp, bp->bio_error); 1399133115Spjd return; 1400133115Spjd } 1401133115Spjd /* 1402133115Spjd * Fill in the component buf structure. 1403133115Spjd */ 1404133115Spjd cp = disk->d_consumer; 1405133115Spjd cbp->bio_done = g_mirror_done; 1406133115Spjd cbp->bio_to = cp->provider; 1407133115Spjd G_MIRROR_LOGREQ(3, cbp, "Sending request."); 1408156610Spjd KASSERT(cp->acr >= 1 && cp->acw >= 1 && cp->ace >= 1, 1409133115Spjd ("Consumer %s not opened (r%dw%de%d).", cp->provider->name, cp->acr, 1410133115Spjd cp->acw, cp->ace)); 1411137248Spjd cp->index++; 1412133115Spjd g_io_request(cbp, cp); 1413133115Spjd} 1414133115Spjd 1415133115Spjdstatic void 1416132904Spjdg_mirror_request_round_robin(struct g_mirror_softc *sc, struct bio *bp) 1417132904Spjd{ 1418132904Spjd struct g_mirror_disk *disk; 1419132904Spjd struct g_consumer *cp; 1420132904Spjd struct bio *cbp; 1421132904Spjd 1422132904Spjd disk = g_mirror_get_disk(sc); 1423132904Spjd if (disk == NULL) { 1424132904Spjd if (bp->bio_error == 0) 1425132904Spjd bp->bio_error = ENXIO; 1426132904Spjd g_io_deliver(bp, bp->bio_error); 1427132904Spjd return; 1428132904Spjd } 1429132904Spjd cbp = g_clone_bio(bp); 1430132904Spjd if (cbp == NULL) { 1431132904Spjd if (bp->bio_error == 0) 1432132904Spjd bp->bio_error = ENOMEM; 1433132904Spjd g_io_deliver(bp, bp->bio_error); 1434132904Spjd return; 1435132904Spjd } 1436132904Spjd /* 1437132904Spjd * Fill in the component buf structure. 1438132904Spjd */ 1439132904Spjd cp = disk->d_consumer; 1440132904Spjd cbp->bio_done = g_mirror_done; 1441132904Spjd cbp->bio_to = cp->provider; 1442132904Spjd G_MIRROR_LOGREQ(3, cbp, "Sending request."); 1443156610Spjd KASSERT(cp->acr >= 1 && cp->acw >= 1 && cp->ace >= 1, 1444132904Spjd ("Consumer %s not opened (r%dw%de%d).", cp->provider->name, cp->acr, 1445132904Spjd cp->acw, cp->ace)); 1446137248Spjd cp->index++; 1447132904Spjd g_io_request(cbp, cp); 1448132904Spjd} 1449132904Spjd 1450200086Smav#define TRACK_SIZE (1 * 1024 * 1024) 1451200086Smav#define LOAD_SCALE 256 1452200086Smav#define ABS(x) (((x) >= 0) ? (x) : (-(x))) 1453200086Smav 1454132904Spjdstatic void 1455132904Spjdg_mirror_request_load(struct g_mirror_softc *sc, struct bio *bp) 1456132904Spjd{ 1457132904Spjd struct g_mirror_disk *disk, *dp; 1458132904Spjd struct g_consumer *cp; 1459132904Spjd struct bio *cbp; 1460200086Smav int prio, best; 1461132904Spjd 1462200086Smav /* Find a disk with the smallest load. */ 1463132904Spjd disk = NULL; 1464200086Smav best = INT_MAX; 1465132904Spjd LIST_FOREACH(dp, &sc->sc_disks, d_next) { 1466132904Spjd if (dp->d_state != G_MIRROR_DISK_STATE_ACTIVE) 1467132904Spjd continue; 1468200086Smav prio = dp->load; 1469200086Smav /* If disk head is precisely in position - highly prefer it. */ 1470200086Smav if (dp->d_last_offset == bp->bio_offset) 1471200086Smav prio -= 2 * LOAD_SCALE; 1472200086Smav else 1473200086Smav /* If disk head is close to position - prefer it. */ 1474200086Smav if (ABS(dp->d_last_offset - bp->bio_offset) < TRACK_SIZE) 1475200086Smav prio -= 1 * LOAD_SCALE; 1476200086Smav if (prio <= best) { 1477132904Spjd disk = dp; 1478200086Smav best = prio; 1479132904Spjd } 1480132904Spjd } 1481146110Spjd KASSERT(disk != NULL, ("NULL disk for %s.", sc->sc_name)); 1482132904Spjd cbp = g_clone_bio(bp); 1483132904Spjd if (cbp == NULL) { 1484132904Spjd if (bp->bio_error == 0) 1485132904Spjd bp->bio_error = ENOMEM; 1486132904Spjd g_io_deliver(bp, bp->bio_error); 1487132904Spjd return; 1488132904Spjd } 1489132904Spjd /* 1490132904Spjd * Fill in the component buf structure. 1491132904Spjd */ 1492132904Spjd cp = disk->d_consumer; 1493132904Spjd cbp->bio_done = g_mirror_done; 1494132904Spjd cbp->bio_to = cp->provider; 1495132904Spjd G_MIRROR_LOGREQ(3, cbp, "Sending request."); 1496156610Spjd KASSERT(cp->acr >= 1 && cp->acw >= 1 && cp->ace >= 1, 1497132904Spjd ("Consumer %s not opened (r%dw%de%d).", cp->provider->name, cp->acr, 1498132904Spjd cp->acw, cp->ace)); 1499137248Spjd cp->index++; 1500200086Smav /* Remember last head position */ 1501200086Smav disk->d_last_offset = bp->bio_offset + bp->bio_length; 1502200086Smav /* Update loads. */ 1503200086Smav LIST_FOREACH(dp, &sc->sc_disks, d_next) { 1504200086Smav dp->load = (dp->d_consumer->index * LOAD_SCALE + 1505200086Smav dp->load * 7) / 8; 1506200086Smav } 1507132904Spjd g_io_request(cbp, cp); 1508132904Spjd} 1509132904Spjd 1510132904Spjdstatic void 1511132904Spjdg_mirror_request_split(struct g_mirror_softc *sc, struct bio *bp) 1512132904Spjd{ 1513132904Spjd struct bio_queue_head queue; 1514132904Spjd struct g_mirror_disk *disk; 1515132904Spjd struct g_consumer *cp; 1516132904Spjd struct bio *cbp; 1517132904Spjd off_t left, mod, offset, slice; 1518132904Spjd u_char *data; 1519132904Spjd u_int ndisks; 1520132904Spjd 1521132904Spjd if (bp->bio_length <= sc->sc_slice) { 1522132904Spjd g_mirror_request_round_robin(sc, bp); 1523132904Spjd return; 1524132904Spjd } 1525132904Spjd ndisks = g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_ACTIVE); 1526132904Spjd slice = bp->bio_length / ndisks; 1527132904Spjd mod = slice % sc->sc_provider->sectorsize; 1528132904Spjd if (mod != 0) 1529132904Spjd slice += sc->sc_provider->sectorsize - mod; 1530132904Spjd /* 1531132904Spjd * Allocate all bios before sending any request, so we can 1532132904Spjd * return ENOMEM in nice and clean way. 1533132904Spjd */ 1534132904Spjd left = bp->bio_length; 1535132904Spjd offset = bp->bio_offset; 1536132904Spjd data = bp->bio_data; 1537132904Spjd bioq_init(&queue); 1538132904Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 1539132904Spjd if (disk->d_state != G_MIRROR_DISK_STATE_ACTIVE) 1540132904Spjd continue; 1541132904Spjd cbp = g_clone_bio(bp); 1542132904Spjd if (cbp == NULL) { 1543132904Spjd for (cbp = bioq_first(&queue); cbp != NULL; 1544132904Spjd cbp = bioq_first(&queue)) { 1545132904Spjd bioq_remove(&queue, cbp); 1546132904Spjd g_destroy_bio(cbp); 1547132904Spjd } 1548132904Spjd if (bp->bio_error == 0) 1549132904Spjd bp->bio_error = ENOMEM; 1550132904Spjd g_io_deliver(bp, bp->bio_error); 1551132904Spjd return; 1552132904Spjd } 1553132904Spjd bioq_insert_tail(&queue, cbp); 1554132904Spjd cbp->bio_done = g_mirror_done; 1555132904Spjd cbp->bio_caller1 = disk; 1556132904Spjd cbp->bio_to = disk->d_consumer->provider; 1557132904Spjd cbp->bio_offset = offset; 1558132904Spjd cbp->bio_data = data; 1559132904Spjd cbp->bio_length = MIN(left, slice); 1560132904Spjd left -= cbp->bio_length; 1561132904Spjd if (left == 0) 1562132904Spjd break; 1563132904Spjd offset += cbp->bio_length; 1564132904Spjd data += cbp->bio_length; 1565132904Spjd } 1566132904Spjd for (cbp = bioq_first(&queue); cbp != NULL; cbp = bioq_first(&queue)) { 1567132904Spjd bioq_remove(&queue, cbp); 1568132904Spjd G_MIRROR_LOGREQ(3, cbp, "Sending request."); 1569132904Spjd disk = cbp->bio_caller1; 1570132904Spjd cbp->bio_caller1 = NULL; 1571132904Spjd cp = disk->d_consumer; 1572156610Spjd KASSERT(cp->acr >= 1 && cp->acw >= 1 && cp->ace >= 1, 1573132904Spjd ("Consumer %s not opened (r%dw%de%d).", cp->provider->name, 1574132904Spjd cp->acr, cp->acw, cp->ace)); 1575137248Spjd disk->d_consumer->index++; 1576132904Spjd g_io_request(cbp, disk->d_consumer); 1577132904Spjd } 1578132904Spjd} 1579132904Spjd 1580132904Spjdstatic void 1581132904Spjdg_mirror_register_request(struct bio *bp) 1582132904Spjd{ 1583132904Spjd struct g_mirror_softc *sc; 1584132904Spjd 1585132904Spjd sc = bp->bio_to->geom->softc; 1586132904Spjd switch (bp->bio_cmd) { 1587132904Spjd case BIO_READ: 1588132904Spjd switch (sc->sc_balance) { 1589133115Spjd case G_MIRROR_BALANCE_LOAD: 1590133115Spjd g_mirror_request_load(sc, bp); 1591133115Spjd break; 1592133115Spjd case G_MIRROR_BALANCE_PREFER: 1593133115Spjd g_mirror_request_prefer(sc, bp); 1594133115Spjd break; 1595132904Spjd case G_MIRROR_BALANCE_ROUND_ROBIN: 1596132904Spjd g_mirror_request_round_robin(sc, bp); 1597132904Spjd break; 1598132904Spjd case G_MIRROR_BALANCE_SPLIT: 1599132904Spjd g_mirror_request_split(sc, bp); 1600132904Spjd break; 1601132904Spjd } 1602132904Spjd return; 1603132904Spjd case BIO_WRITE: 1604132904Spjd case BIO_DELETE: 1605132904Spjd { 1606132904Spjd struct g_mirror_disk *disk; 1607135833Spjd struct g_mirror_disk_sync *sync; 1608132904Spjd struct bio_queue_head queue; 1609132904Spjd struct g_consumer *cp; 1610132904Spjd struct bio *cbp; 1611132904Spjd 1612156610Spjd /* 1613156610Spjd * Delay the request if it is colliding with a synchronization 1614156610Spjd * request. 1615156610Spjd */ 1616156610Spjd if (g_mirror_sync_collision(sc, bp)) { 1617156610Spjd g_mirror_regular_delay(sc, bp); 1618156610Spjd return; 1619156610Spjd } 1620156610Spjd 1621137248Spjd if (sc->sc_idle) 1622137248Spjd g_mirror_unidle(sc); 1623155539Spjd else 1624155581Spjd sc->sc_last_write = time_uptime; 1625155539Spjd 1626132904Spjd /* 1627132904Spjd * Allocate all bios before sending any request, so we can 1628132904Spjd * return ENOMEM in nice and clean way. 1629132904Spjd */ 1630132904Spjd bioq_init(&queue); 1631132904Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 1632135833Spjd sync = &disk->d_sync; 1633132904Spjd switch (disk->d_state) { 1634132904Spjd case G_MIRROR_DISK_STATE_ACTIVE: 1635132904Spjd break; 1636132904Spjd case G_MIRROR_DISK_STATE_SYNCHRONIZING: 1637135833Spjd if (bp->bio_offset >= sync->ds_offset) 1638132904Spjd continue; 1639132904Spjd break; 1640132904Spjd default: 1641132904Spjd continue; 1642132904Spjd } 1643238500Sglebius if (bp->bio_cmd == BIO_DELETE && 1644238500Sglebius (disk->d_flags & G_MIRROR_DISK_FLAG_CANDELETE) == 0) 1645238500Sglebius continue; 1646132904Spjd cbp = g_clone_bio(bp); 1647132904Spjd if (cbp == NULL) { 1648132904Spjd for (cbp = bioq_first(&queue); cbp != NULL; 1649132904Spjd cbp = bioq_first(&queue)) { 1650132904Spjd bioq_remove(&queue, cbp); 1651132904Spjd g_destroy_bio(cbp); 1652132904Spjd } 1653132904Spjd if (bp->bio_error == 0) 1654132904Spjd bp->bio_error = ENOMEM; 1655132904Spjd g_io_deliver(bp, bp->bio_error); 1656132904Spjd return; 1657132904Spjd } 1658132904Spjd bioq_insert_tail(&queue, cbp); 1659135831Spjd cbp->bio_done = g_mirror_done; 1660132904Spjd cp = disk->d_consumer; 1661135831Spjd cbp->bio_caller1 = cp; 1662132904Spjd cbp->bio_to = cp->provider; 1663156610Spjd KASSERT(cp->acr >= 1 && cp->acw >= 1 && cp->ace >= 1, 1664132904Spjd ("Consumer %s not opened (r%dw%de%d).", 1665132904Spjd cp->provider->name, cp->acr, cp->acw, cp->ace)); 1666135831Spjd } 1667135831Spjd for (cbp = bioq_first(&queue); cbp != NULL; 1668135831Spjd cbp = bioq_first(&queue)) { 1669135831Spjd bioq_remove(&queue, cbp); 1670135831Spjd G_MIRROR_LOGREQ(3, cbp, "Sending request."); 1671135831Spjd cp = cbp->bio_caller1; 1672135831Spjd cbp->bio_caller1 = NULL; 1673137248Spjd cp->index++; 1674155539Spjd sc->sc_writes++; 1675132904Spjd g_io_request(cbp, cp); 1676132904Spjd } 1677132904Spjd /* 1678156610Spjd * Put request onto inflight queue, so we can check if new 1679156610Spjd * synchronization requests don't collide with it. 1680156610Spjd */ 1681156610Spjd bioq_insert_tail(&sc->sc_inflight, bp); 1682156610Spjd /* 1683132904Spjd * Bump syncid on first write. 1684132904Spjd */ 1685139670Spjd if ((sc->sc_bump_id & G_MIRROR_BUMP_SYNCID) != 0) { 1686139213Spjd sc->sc_bump_id &= ~G_MIRROR_BUMP_SYNCID; 1687139051Spjd g_mirror_bump_syncid(sc); 1688132904Spjd } 1689132904Spjd return; 1690132904Spjd } 1691132904Spjd default: 1692132904Spjd KASSERT(1 == 0, ("Invalid command here: %u (device=%s)", 1693132904Spjd bp->bio_cmd, sc->sc_name)); 1694132904Spjd break; 1695132904Spjd } 1696132904Spjd} 1697132904Spjd 1698133484Spjdstatic int 1699133484Spjdg_mirror_can_destroy(struct g_mirror_softc *sc) 1700133484Spjd{ 1701133484Spjd struct g_geom *gp; 1702133484Spjd struct g_consumer *cp; 1703133484Spjd 1704133484Spjd g_topology_assert(); 1705133484Spjd gp = sc->sc_geom; 1706158112Spjd if (gp->softc == NULL) 1707158112Spjd return (1); 1708235968Sae if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_TASTING) != 0) 1709235968Sae return (0); 1710133484Spjd LIST_FOREACH(cp, &gp->consumer, consumer) { 1711133484Spjd if (g_mirror_is_busy(sc, cp)) 1712133484Spjd return (0); 1713133484Spjd } 1714133484Spjd gp = sc->sc_sync.ds_geom; 1715133484Spjd LIST_FOREACH(cp, &gp->consumer, consumer) { 1716133484Spjd if (g_mirror_is_busy(sc, cp)) 1717133484Spjd return (0); 1718133484Spjd } 1719133484Spjd G_MIRROR_DEBUG(2, "No I/O requests for %s, it can be destroyed.", 1720133484Spjd sc->sc_name); 1721133484Spjd return (1); 1722133484Spjd} 1723133484Spjd 1724133484Spjdstatic int 1725133484Spjdg_mirror_try_destroy(struct g_mirror_softc *sc) 1726133484Spjd{ 1727133484Spjd 1728146616Spjd if (sc->sc_rootmount != NULL) { 1729146616Spjd G_MIRROR_DEBUG(1, "root_mount_rel[%u] %p", __LINE__, 1730146616Spjd sc->sc_rootmount); 1731146616Spjd root_mount_rel(sc->sc_rootmount); 1732146616Spjd sc->sc_rootmount = NULL; 1733146616Spjd } 1734139213Spjd g_topology_lock(); 1735139213Spjd if (!g_mirror_can_destroy(sc)) { 1736139213Spjd g_topology_unlock(); 1737139213Spjd return (0); 1738139213Spjd } 1739158112Spjd sc->sc_geom->softc = NULL; 1740158112Spjd sc->sc_sync.ds_geom->softc = NULL; 1741133484Spjd if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_WAIT) != 0) { 1742133484Spjd g_topology_unlock(); 1743133484Spjd G_MIRROR_DEBUG(4, "%s: Waking up %p.", __func__, 1744133484Spjd &sc->sc_worker); 1745156610Spjd /* Unlock sc_lock here, as it can be destroyed after wakeup. */ 1746156610Spjd sx_xunlock(&sc->sc_lock); 1747133484Spjd wakeup(&sc->sc_worker); 1748133484Spjd sc->sc_worker = NULL; 1749133484Spjd } else { 1750156610Spjd g_topology_unlock(); 1751133484Spjd g_mirror_destroy_device(sc); 1752133484Spjd free(sc, M_MIRROR); 1753133484Spjd } 1754133484Spjd return (1); 1755133484Spjd} 1756133484Spjd 1757132904Spjd/* 1758132904Spjd * Worker thread. 1759132904Spjd */ 1760132904Spjdstatic void 1761132904Spjdg_mirror_worker(void *arg) 1762132904Spjd{ 1763132904Spjd struct g_mirror_softc *sc; 1764132904Spjd struct g_mirror_event *ep; 1765132904Spjd struct bio *bp; 1766155539Spjd int timeout; 1767132904Spjd 1768132904Spjd sc = arg; 1769170307Sjeff thread_lock(curthread); 1770139451Sjhb sched_prio(curthread, PRIBIO); 1771170307Sjeff thread_unlock(curthread); 1772132904Spjd 1773156610Spjd sx_xlock(&sc->sc_lock); 1774132904Spjd for (;;) { 1775132904Spjd G_MIRROR_DEBUG(5, "%s: Let's see...", __func__); 1776132904Spjd /* 1777132904Spjd * First take a look at events. 1778132904Spjd * This is important to handle events before any I/O requests. 1779132904Spjd */ 1780132904Spjd ep = g_mirror_event_get(sc); 1781156610Spjd if (ep != NULL) { 1782139140Spjd g_mirror_event_remove(sc, ep); 1783132904Spjd if ((ep->e_flags & G_MIRROR_EVENT_DEVICE) != 0) { 1784132904Spjd /* Update only device status. */ 1785132904Spjd G_MIRROR_DEBUG(3, 1786132904Spjd "Running event for device %s.", 1787132904Spjd sc->sc_name); 1788132904Spjd ep->e_error = 0; 1789139051Spjd g_mirror_update_device(sc, 1); 1790132904Spjd } else { 1791132904Spjd /* Update disk status. */ 1792132904Spjd G_MIRROR_DEBUG(3, "Running event for disk %s.", 1793132904Spjd g_mirror_get_diskname(ep->e_disk)); 1794132904Spjd ep->e_error = g_mirror_update_disk(ep->e_disk, 1795139051Spjd ep->e_state); 1796132904Spjd if (ep->e_error == 0) 1797139051Spjd g_mirror_update_device(sc, 0); 1798132904Spjd } 1799132904Spjd if ((ep->e_flags & G_MIRROR_EVENT_DONTWAIT) != 0) { 1800132904Spjd KASSERT(ep->e_error == 0, 1801132904Spjd ("Error cannot be handled.")); 1802132904Spjd g_mirror_event_free(ep); 1803132904Spjd } else { 1804132904Spjd ep->e_flags |= G_MIRROR_EVENT_DONE; 1805132904Spjd G_MIRROR_DEBUG(4, "%s: Waking up %p.", __func__, 1806132904Spjd ep); 1807132904Spjd mtx_lock(&sc->sc_events_mtx); 1808132904Spjd wakeup(ep); 1809132904Spjd mtx_unlock(&sc->sc_events_mtx); 1810132904Spjd } 1811132904Spjd if ((sc->sc_flags & 1812132904Spjd G_MIRROR_DEVICE_FLAG_DESTROY) != 0) { 1813156610Spjd if (g_mirror_try_destroy(sc)) { 1814156610Spjd curthread->td_pflags &= ~TDP_GEOM; 1815156610Spjd G_MIRROR_DEBUG(1, "Thread exiting."); 1816172836Sjulian kproc_exit(0); 1817156610Spjd } 1818132904Spjd } 1819132904Spjd G_MIRROR_DEBUG(5, "%s: I'm here 1.", __func__); 1820132904Spjd continue; 1821132904Spjd } 1822132904Spjd /* 1823155539Spjd * Check if we can mark array as CLEAN and if we can't take 1824155539Spjd * how much seconds should we wait. 1825155539Spjd */ 1826156610Spjd timeout = g_mirror_idle(sc, -1); 1827155539Spjd /* 1828132904Spjd * Now I/O requests. 1829132904Spjd */ 1830132904Spjd /* Get first request from the queue. */ 1831132904Spjd mtx_lock(&sc->sc_queue_mtx); 1832132904Spjd bp = bioq_first(&sc->sc_queue); 1833132904Spjd if (bp == NULL) { 1834132904Spjd if ((sc->sc_flags & 1835132904Spjd G_MIRROR_DEVICE_FLAG_DESTROY) != 0) { 1836132904Spjd mtx_unlock(&sc->sc_queue_mtx); 1837156610Spjd if (g_mirror_try_destroy(sc)) { 1838156610Spjd curthread->td_pflags &= ~TDP_GEOM; 1839156610Spjd G_MIRROR_DEBUG(1, "Thread exiting."); 1840172836Sjulian kproc_exit(0); 1841156610Spjd } 1842133484Spjd mtx_lock(&sc->sc_queue_mtx); 1843132904Spjd } 1844156610Spjd sx_xunlock(&sc->sc_lock); 1845158116Spjd /* 1846158116Spjd * XXX: We can miss an event here, because an event 1847158116Spjd * can be added without sx-device-lock and without 1848158116Spjd * mtx-queue-lock. Maybe I should just stop using 1849158116Spjd * dedicated mutex for events synchronization and 1850158116Spjd * stick with the queue lock? 1851158116Spjd * The event will hang here until next I/O request 1852158116Spjd * or next event is received. 1853158116Spjd */ 1854155539Spjd MSLEEP(sc, &sc->sc_queue_mtx, PRIBIO | PDROP, "m:w1", 1855155539Spjd timeout * hz); 1856156610Spjd sx_xlock(&sc->sc_lock); 1857155539Spjd G_MIRROR_DEBUG(5, "%s: I'm here 4.", __func__); 1858132904Spjd continue; 1859132904Spjd } 1860132904Spjd bioq_remove(&sc->sc_queue, bp); 1861132904Spjd mtx_unlock(&sc->sc_queue_mtx); 1862132904Spjd 1863162282Spjd if (bp->bio_from->geom == sc->sc_sync.ds_geom && 1864162282Spjd (bp->bio_cflags & G_MIRROR_BIO_FLAG_SYNC) != 0) { 1865162282Spjd g_mirror_sync_request(bp); /* READ */ 1866162282Spjd } else if (bp->bio_to != sc->sc_provider) { 1867161116Spjd if ((bp->bio_cflags & G_MIRROR_BIO_FLAG_REGULAR) != 0) 1868161116Spjd g_mirror_regular_request(bp); 1869161116Spjd else if ((bp->bio_cflags & G_MIRROR_BIO_FLAG_SYNC) != 0) 1870162282Spjd g_mirror_sync_request(bp); /* WRITE */ 1871161116Spjd else { 1872161116Spjd KASSERT(0, 1873161116Spjd ("Invalid request cflags=0x%hhx to=%s.", 1874161116Spjd bp->bio_cflags, bp->bio_to->name)); 1875161116Spjd } 1876161116Spjd } else { 1877132904Spjd g_mirror_register_request(bp); 1878161116Spjd } 1879139140Spjd G_MIRROR_DEBUG(5, "%s: I'm here 9.", __func__); 1880132904Spjd } 1881132904Spjd} 1882132904Spjd 1883132904Spjdstatic void 1884155539Spjdg_mirror_update_idle(struct g_mirror_softc *sc, struct g_mirror_disk *disk) 1885132904Spjd{ 1886132904Spjd 1887156610Spjd sx_assert(&sc->sc_lock, SX_LOCKED); 1888156610Spjd 1889163888Spjd if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_NOFAILSYNC) != 0) 1890163888Spjd return; 1891155539Spjd if (!sc->sc_idle && (disk->d_flags & G_MIRROR_DISK_FLAG_DIRTY) == 0) { 1892155539Spjd G_MIRROR_DEBUG(1, "Disk %s (device %s) marked as dirty.", 1893156610Spjd g_mirror_get_diskname(disk), sc->sc_name); 1894155539Spjd disk->d_flags |= G_MIRROR_DISK_FLAG_DIRTY; 1895155539Spjd } else if (sc->sc_idle && 1896155539Spjd (disk->d_flags & G_MIRROR_DISK_FLAG_DIRTY) != 0) { 1897155539Spjd G_MIRROR_DEBUG(1, "Disk %s (device %s) marked as clean.", 1898156610Spjd g_mirror_get_diskname(disk), sc->sc_name); 1899155539Spjd disk->d_flags &= ~G_MIRROR_DISK_FLAG_DIRTY; 1900132904Spjd } 1901132904Spjd} 1902132904Spjd 1903132904Spjdstatic void 1904132904Spjdg_mirror_sync_start(struct g_mirror_disk *disk) 1905132904Spjd{ 1906132904Spjd struct g_mirror_softc *sc; 1907156610Spjd struct g_consumer *cp; 1908156610Spjd struct bio *bp; 1909156610Spjd int error, i; 1910132904Spjd 1911156610Spjd g_topology_assert_not(); 1912156610Spjd sc = disk->d_softc; 1913156610Spjd sx_assert(&sc->sc_lock, SX_LOCKED); 1914132904Spjd 1915156610Spjd KASSERT(disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING, 1916156610Spjd ("Disk %s is not marked for synchronization.", 1917156610Spjd g_mirror_get_diskname(disk))); 1918132904Spjd KASSERT(sc->sc_state == G_MIRROR_DEVICE_STATE_RUNNING, 1919132904Spjd ("Device not in RUNNING state (%s, %u).", sc->sc_name, 1920132904Spjd sc->sc_state)); 1921132904Spjd 1922156610Spjd sx_xunlock(&sc->sc_lock); 1923156610Spjd g_topology_lock(); 1924156610Spjd cp = g_new_consumer(sc->sc_sync.ds_geom); 1925156610Spjd error = g_attach(cp, sc->sc_provider); 1926156610Spjd KASSERT(error == 0, 1927156610Spjd ("Cannot attach to %s (error=%d).", sc->sc_name, error)); 1928156610Spjd error = g_access(cp, 1, 0, 0); 1929156610Spjd KASSERT(error == 0, ("Cannot open %s (error=%d).", sc->sc_name, error)); 1930156610Spjd g_topology_unlock(); 1931156610Spjd sx_xlock(&sc->sc_lock); 1932156610Spjd 1933132904Spjd G_MIRROR_DEBUG(0, "Device %s: rebuilding provider %s.", sc->sc_name, 1934132904Spjd g_mirror_get_diskname(disk)); 1935163888Spjd if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_NOFAILSYNC) == 0) 1936163888Spjd disk->d_flags |= G_MIRROR_DISK_FLAG_DIRTY; 1937132904Spjd KASSERT(disk->d_sync.ds_consumer == NULL, 1938132904Spjd ("Sync consumer already exists (device=%s, disk=%s).", 1939132904Spjd sc->sc_name, g_mirror_get_diskname(disk))); 1940156610Spjd 1941156610Spjd disk->d_sync.ds_consumer = cp; 1942132904Spjd disk->d_sync.ds_consumer->private = disk; 1943137248Spjd disk->d_sync.ds_consumer->index = 0; 1944156610Spjd 1945156610Spjd /* 1946156610Spjd * Allocate memory for synchronization bios and initialize them. 1947156610Spjd */ 1948156610Spjd disk->d_sync.ds_bios = malloc(sizeof(struct bio *) * g_mirror_syncreqs, 1949156610Spjd M_MIRROR, M_WAITOK); 1950156610Spjd for (i = 0; i < g_mirror_syncreqs; i++) { 1951156610Spjd bp = g_alloc_bio(); 1952156610Spjd disk->d_sync.ds_bios[i] = bp; 1953156610Spjd bp->bio_parent = NULL; 1954156610Spjd bp->bio_cmd = BIO_READ; 1955156610Spjd bp->bio_data = malloc(MAXPHYS, M_MIRROR, M_WAITOK); 1956156610Spjd bp->bio_cflags = 0; 1957156610Spjd bp->bio_offset = disk->d_sync.ds_offset; 1958156610Spjd bp->bio_length = MIN(MAXPHYS, sc->sc_mediasize - bp->bio_offset); 1959156610Spjd disk->d_sync.ds_offset += bp->bio_length; 1960156610Spjd bp->bio_done = g_mirror_sync_done; 1961156610Spjd bp->bio_from = disk->d_sync.ds_consumer; 1962156610Spjd bp->bio_to = sc->sc_provider; 1963156684Sru bp->bio_caller1 = (void *)(uintptr_t)i; 1964156610Spjd } 1965156610Spjd 1966156610Spjd /* Increase the number of disks in SYNCHRONIZING state. */ 1967132904Spjd sc->sc_sync.ds_ndisks++; 1968156610Spjd /* Set the number of in-flight synchronization requests. */ 1969156610Spjd disk->d_sync.ds_inflight = g_mirror_syncreqs; 1970156610Spjd 1971156610Spjd /* 1972156610Spjd * Fire off first synchronization requests. 1973156610Spjd */ 1974156610Spjd for (i = 0; i < g_mirror_syncreqs; i++) { 1975156610Spjd bp = disk->d_sync.ds_bios[i]; 1976156610Spjd G_MIRROR_LOGREQ(3, bp, "Sending synchronization request."); 1977156610Spjd disk->d_sync.ds_consumer->index++; 1978156610Spjd /* 1979156610Spjd * Delay the request if it is colliding with a regular request. 1980156610Spjd */ 1981156610Spjd if (g_mirror_regular_collision(sc, bp)) 1982156610Spjd g_mirror_sync_delay(sc, bp); 1983156610Spjd else 1984156610Spjd g_io_request(bp, disk->d_sync.ds_consumer); 1985156610Spjd } 1986132904Spjd} 1987132904Spjd 1988132904Spjd/* 1989132904Spjd * Stop synchronization process. 1990132904Spjd * type: 0 - synchronization finished 1991132904Spjd * 1 - synchronization stopped 1992132904Spjd */ 1993132904Spjdstatic void 1994132904Spjdg_mirror_sync_stop(struct g_mirror_disk *disk, int type) 1995132904Spjd{ 1996156610Spjd struct g_mirror_softc *sc; 1997156610Spjd struct g_consumer *cp; 1998132904Spjd 1999156610Spjd g_topology_assert_not(); 2000156610Spjd sc = disk->d_softc; 2001156610Spjd sx_assert(&sc->sc_lock, SX_LOCKED); 2002156610Spjd 2003132904Spjd KASSERT(disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING, 2004132904Spjd ("Wrong disk state (%s, %s).", g_mirror_get_diskname(disk), 2005132904Spjd g_mirror_disk_state2str(disk->d_state))); 2006132904Spjd if (disk->d_sync.ds_consumer == NULL) 2007132904Spjd return; 2008132904Spjd 2009132904Spjd if (type == 0) { 2010132904Spjd G_MIRROR_DEBUG(0, "Device %s: rebuilding provider %s finished.", 2011156610Spjd sc->sc_name, g_mirror_get_diskname(disk)); 2012132904Spjd } else /* if (type == 1) */ { 2013132904Spjd G_MIRROR_DEBUG(0, "Device %s: rebuilding provider %s stopped.", 2014156610Spjd sc->sc_name, g_mirror_get_diskname(disk)); 2015132904Spjd } 2016156610Spjd free(disk->d_sync.ds_bios, M_MIRROR); 2017156610Spjd disk->d_sync.ds_bios = NULL; 2018156610Spjd cp = disk->d_sync.ds_consumer; 2019132904Spjd disk->d_sync.ds_consumer = NULL; 2020132904Spjd disk->d_flags &= ~G_MIRROR_DISK_FLAG_DIRTY; 2021156610Spjd sc->sc_sync.ds_ndisks--; 2022156610Spjd sx_xunlock(&sc->sc_lock); /* Avoid recursion on sc_lock. */ 2023156610Spjd g_topology_lock(); 2024156610Spjd g_mirror_kill_consumer(sc, cp); 2025156610Spjd g_topology_unlock(); 2026156610Spjd sx_xlock(&sc->sc_lock); 2027132904Spjd} 2028132904Spjd 2029132904Spjdstatic void 2030132904Spjdg_mirror_launch_provider(struct g_mirror_softc *sc) 2031132904Spjd{ 2032132904Spjd struct g_mirror_disk *disk; 2033252063Sscottl struct g_provider *pp, *dp; 2034132904Spjd 2035156610Spjd sx_assert(&sc->sc_lock, SX_LOCKED); 2036132904Spjd 2037156610Spjd g_topology_lock(); 2038132904Spjd pp = g_new_providerf(sc->sc_geom, "mirror/%s", sc->sc_name); 2039132904Spjd pp->mediasize = sc->sc_mediasize; 2040132904Spjd pp->sectorsize = sc->sc_sectorsize; 2041200935Smav pp->stripesize = 0; 2042200935Smav pp->stripeoffset = 0; 2043252063Sscottl 2044252063Sscottl /* Splitting of unmapped BIO's could work but isn't implemented now */ 2045252063Sscottl if (sc->sc_balance != G_MIRROR_BALANCE_SPLIT) 2046252063Sscottl pp->flags |= G_PF_ACCEPT_UNMAPPED; 2047252063Sscottl 2048200935Smav LIST_FOREACH(disk, &sc->sc_disks, d_next) { 2049252063Sscottl if (disk->d_consumer && disk->d_consumer->provider) { 2050252063Sscottl dp = disk->d_consumer->provider; 2051252063Sscottl if (dp->stripesize > pp->stripesize) { 2052252063Sscottl pp->stripesize = dp->stripesize; 2053252063Sscottl pp->stripeoffset = dp->stripeoffset; 2054252063Sscottl } 2055252063Sscottl /* A provider underneath us doesn't support unmapped */ 2056252063Sscottl if ((dp->flags & G_PF_ACCEPT_UNMAPPED) == 0) { 2057265670Smav G_MIRROR_DEBUG(0, "Cancelling unmapped " 2058265670Smav "because of %s.", dp->name); 2059252063Sscottl pp->flags &= ~G_PF_ACCEPT_UNMAPPED; 2060252063Sscottl } 2061200935Smav } 2062200935Smav } 2063132904Spjd sc->sc_provider = pp; 2064132904Spjd g_error_provider(pp, 0); 2065156610Spjd g_topology_unlock(); 2066162188Sjmg G_MIRROR_DEBUG(0, "Device %s launched (%u/%u).", pp->name, 2067162188Sjmg g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_ACTIVE), sc->sc_ndisks); 2068132904Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 2069132904Spjd if (disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING) 2070132904Spjd g_mirror_sync_start(disk); 2071132904Spjd } 2072132904Spjd} 2073132904Spjd 2074132904Spjdstatic void 2075132904Spjdg_mirror_destroy_provider(struct g_mirror_softc *sc) 2076132904Spjd{ 2077132904Spjd struct g_mirror_disk *disk; 2078132904Spjd struct bio *bp; 2079132904Spjd 2080156610Spjd g_topology_assert_not(); 2081132904Spjd KASSERT(sc->sc_provider != NULL, ("NULL provider (device=%s).", 2082132904Spjd sc->sc_name)); 2083132904Spjd 2084156610Spjd g_topology_lock(); 2085132904Spjd g_error_provider(sc->sc_provider, ENXIO); 2086132904Spjd mtx_lock(&sc->sc_queue_mtx); 2087132904Spjd while ((bp = bioq_first(&sc->sc_queue)) != NULL) { 2088132904Spjd bioq_remove(&sc->sc_queue, bp); 2089132904Spjd g_io_deliver(bp, ENXIO); 2090132904Spjd } 2091132904Spjd mtx_unlock(&sc->sc_queue_mtx); 2092132904Spjd G_MIRROR_DEBUG(0, "Device %s: provider %s destroyed.", sc->sc_name, 2093132904Spjd sc->sc_provider->name); 2094132904Spjd sc->sc_provider->flags |= G_PF_WITHER; 2095132904Spjd g_orphan_provider(sc->sc_provider, ENXIO); 2096156610Spjd g_topology_unlock(); 2097132904Spjd sc->sc_provider = NULL; 2098132904Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 2099132904Spjd if (disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING) 2100132904Spjd g_mirror_sync_stop(disk, 1); 2101132904Spjd } 2102132904Spjd} 2103132904Spjd 2104132904Spjdstatic void 2105132904Spjdg_mirror_go(void *arg) 2106132904Spjd{ 2107132904Spjd struct g_mirror_softc *sc; 2108132904Spjd 2109132904Spjd sc = arg; 2110132904Spjd G_MIRROR_DEBUG(0, "Force device %s start due to timeout.", sc->sc_name); 2111132904Spjd g_mirror_event_send(sc, 0, 2112132904Spjd G_MIRROR_EVENT_DONTWAIT | G_MIRROR_EVENT_DEVICE); 2113132904Spjd} 2114132904Spjd 2115132904Spjdstatic u_int 2116132904Spjdg_mirror_determine_state(struct g_mirror_disk *disk) 2117132904Spjd{ 2118132904Spjd struct g_mirror_softc *sc; 2119132904Spjd u_int state; 2120132904Spjd 2121132904Spjd sc = disk->d_softc; 2122132904Spjd if (sc->sc_syncid == disk->d_sync.ds_syncid) { 2123132904Spjd if ((disk->d_flags & 2124132904Spjd G_MIRROR_DISK_FLAG_SYNCHRONIZING) == 0) { 2125132904Spjd /* Disk does not need synchronization. */ 2126132904Spjd state = G_MIRROR_DISK_STATE_ACTIVE; 2127132904Spjd } else { 2128132904Spjd if ((sc->sc_flags & 2129156873Spjd G_MIRROR_DEVICE_FLAG_NOAUTOSYNC) == 0 || 2130132904Spjd (disk->d_flags & 2131132904Spjd G_MIRROR_DISK_FLAG_FORCE_SYNC) != 0) { 2132132904Spjd /* 2133132904Spjd * We can start synchronization from 2134132904Spjd * the stored offset. 2135132904Spjd */ 2136132904Spjd state = G_MIRROR_DISK_STATE_SYNCHRONIZING; 2137132904Spjd } else { 2138132904Spjd state = G_MIRROR_DISK_STATE_STALE; 2139132904Spjd } 2140132904Spjd } 2141132904Spjd } else if (disk->d_sync.ds_syncid < sc->sc_syncid) { 2142132904Spjd /* 2143132904Spjd * Reset all synchronization data for this disk, 2144132904Spjd * because if it even was synchronized, it was 2145132904Spjd * synchronized to disks with different syncid. 2146132904Spjd */ 2147132904Spjd disk->d_flags |= G_MIRROR_DISK_FLAG_SYNCHRONIZING; 2148132904Spjd disk->d_sync.ds_offset = 0; 2149132904Spjd disk->d_sync.ds_offset_done = 0; 2150132904Spjd disk->d_sync.ds_syncid = sc->sc_syncid; 2151132904Spjd if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_NOAUTOSYNC) == 0 || 2152132904Spjd (disk->d_flags & G_MIRROR_DISK_FLAG_FORCE_SYNC) != 0) { 2153132904Spjd state = G_MIRROR_DISK_STATE_SYNCHRONIZING; 2154132904Spjd } else { 2155132904Spjd state = G_MIRROR_DISK_STATE_STALE; 2156132904Spjd } 2157132904Spjd } else /* if (sc->sc_syncid < disk->d_sync.ds_syncid) */ { 2158132904Spjd /* 2159132904Spjd * Not good, NOT GOOD! 2160132904Spjd * It means that mirror was started on stale disks 2161132904Spjd * and more fresh disk just arrive. 2162160895Spjd * If there were writes, mirror is broken, sorry. 2163132904Spjd * I think the best choice here is don't touch 2164160964Syar * this disk and inform the user loudly. 2165132904Spjd */ 2166132904Spjd G_MIRROR_DEBUG(0, "Device %s was started before the freshest " 2167132904Spjd "disk (%s) arrives!! It will not be connected to the " 2168132904Spjd "running device.", sc->sc_name, 2169132904Spjd g_mirror_get_diskname(disk)); 2170132904Spjd g_mirror_destroy_disk(disk); 2171132904Spjd state = G_MIRROR_DISK_STATE_NONE; 2172132904Spjd /* Return immediately, because disk was destroyed. */ 2173132904Spjd return (state); 2174132904Spjd } 2175132904Spjd G_MIRROR_DEBUG(3, "State for %s disk: %s.", 2176132904Spjd g_mirror_get_diskname(disk), g_mirror_disk_state2str(state)); 2177132904Spjd return (state); 2178132904Spjd} 2179132904Spjd 2180132904Spjd/* 2181132904Spjd * Update device state. 2182132904Spjd */ 2183132904Spjdstatic void 2184139051Spjdg_mirror_update_device(struct g_mirror_softc *sc, boolean_t force) 2185132904Spjd{ 2186132904Spjd struct g_mirror_disk *disk; 2187132904Spjd u_int state; 2188132904Spjd 2189156610Spjd sx_assert(&sc->sc_lock, SX_XLOCKED); 2190132904Spjd 2191132904Spjd switch (sc->sc_state) { 2192132904Spjd case G_MIRROR_DEVICE_STATE_STARTING: 2193132904Spjd { 2194139213Spjd struct g_mirror_disk *pdisk, *tdisk; 2195139213Spjd u_int dirty, ndisks, genid, syncid; 2196132904Spjd 2197132904Spjd KASSERT(sc->sc_provider == NULL, 2198132904Spjd ("Non-NULL provider in STARTING state (%s).", sc->sc_name)); 2199132904Spjd /* 2200132904Spjd * Are we ready? We are, if all disks are connected or 2201132904Spjd * if we have any disks and 'force' is true. 2202132904Spjd */ 2203156610Spjd ndisks = g_mirror_ndisks(sc, -1); 2204157290Spjd if (sc->sc_ndisks == ndisks || (force && ndisks > 0)) { 2205132904Spjd ; 2206156610Spjd } else if (ndisks == 0) { 2207132904Spjd /* 2208132904Spjd * Disks went down in starting phase, so destroy 2209132904Spjd * device. 2210132904Spjd */ 2211146616Spjd callout_drain(&sc->sc_callout); 2212146616Spjd sc->sc_flags |= G_MIRROR_DEVICE_FLAG_DESTROY; 2213146616Spjd G_MIRROR_DEBUG(1, "root_mount_rel[%u] %p", __LINE__, 2214146616Spjd sc->sc_rootmount); 2215145305Spjd root_mount_rel(sc->sc_rootmount); 2216145305Spjd sc->sc_rootmount = NULL; 2217132904Spjd return; 2218132904Spjd } else { 2219132904Spjd return; 2220132904Spjd } 2221132904Spjd 2222132904Spjd /* 2223132904Spjd * Activate all disks with the biggest syncid. 2224132904Spjd */ 2225132904Spjd if (force) { 2226132904Spjd /* 2227133079Spjd * If 'force' is true, we have been called due to 2228133079Spjd * timeout, so don't bother canceling timeout. 2229132904Spjd */ 2230132904Spjd ndisks = 0; 2231132904Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 2232132904Spjd if ((disk->d_flags & 2233132904Spjd G_MIRROR_DISK_FLAG_SYNCHRONIZING) == 0) { 2234132904Spjd ndisks++; 2235132904Spjd } 2236132904Spjd } 2237132904Spjd if (ndisks == 0) { 2238132941Spjd /* No valid disks found, destroy device. */ 2239132941Spjd sc->sc_flags |= G_MIRROR_DEVICE_FLAG_DESTROY; 2240146616Spjd G_MIRROR_DEBUG(1, "root_mount_rel[%u] %p", 2241146616Spjd __LINE__, sc->sc_rootmount); 2242146616Spjd root_mount_rel(sc->sc_rootmount); 2243146616Spjd sc->sc_rootmount = NULL; 2244132904Spjd return; 2245132904Spjd } 2246132904Spjd } else { 2247132904Spjd /* Cancel timeout. */ 2248132904Spjd callout_drain(&sc->sc_callout); 2249132904Spjd } 2250132904Spjd 2251132904Spjd /* 2252139213Spjd * Find the biggest genid. 2253132904Spjd */ 2254139213Spjd genid = 0; 2255139213Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 2256139213Spjd if (disk->d_genid > genid) 2257139213Spjd genid = disk->d_genid; 2258139213Spjd } 2259139213Spjd sc->sc_genid = genid; 2260139213Spjd /* 2261139213Spjd * Remove all disks without the biggest genid. 2262139213Spjd */ 2263139213Spjd LIST_FOREACH_SAFE(disk, &sc->sc_disks, d_next, tdisk) { 2264139213Spjd if (disk->d_genid < genid) { 2265139213Spjd G_MIRROR_DEBUG(0, 2266139213Spjd "Component %s (device %s) broken, skipping.", 2267139213Spjd g_mirror_get_diskname(disk), sc->sc_name); 2268139213Spjd g_mirror_destroy_disk(disk); 2269139213Spjd } 2270139213Spjd } 2271139213Spjd 2272139213Spjd /* 2273139213Spjd * Find the biggest syncid. 2274139213Spjd */ 2275132904Spjd syncid = 0; 2276132904Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 2277132904Spjd if (disk->d_sync.ds_syncid > syncid) 2278132904Spjd syncid = disk->d_sync.ds_syncid; 2279132904Spjd } 2280132904Spjd 2281132904Spjd /* 2282132904Spjd * Here we need to look for dirty disks and if all disks 2283132904Spjd * with the biggest syncid are dirty, we have to choose 2284132904Spjd * one with the biggest priority and rebuild the rest. 2285132904Spjd */ 2286132904Spjd /* 2287132904Spjd * Find the number of dirty disks with the biggest syncid. 2288132904Spjd * Find the number of disks with the biggest syncid. 2289132904Spjd * While here, find a disk with the biggest priority. 2290132904Spjd */ 2291132904Spjd dirty = ndisks = 0; 2292132904Spjd pdisk = NULL; 2293132904Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 2294132904Spjd if (disk->d_sync.ds_syncid != syncid) 2295132904Spjd continue; 2296132904Spjd if ((disk->d_flags & 2297132904Spjd G_MIRROR_DISK_FLAG_SYNCHRONIZING) != 0) { 2298132904Spjd continue; 2299132904Spjd } 2300132904Spjd ndisks++; 2301132904Spjd if ((disk->d_flags & G_MIRROR_DISK_FLAG_DIRTY) != 0) { 2302132904Spjd dirty++; 2303132904Spjd if (pdisk == NULL || 2304132904Spjd pdisk->d_priority < disk->d_priority) { 2305132904Spjd pdisk = disk; 2306132904Spjd } 2307132904Spjd } 2308132904Spjd } 2309132904Spjd if (dirty == 0) { 2310132904Spjd /* No dirty disks at all, great. */ 2311132904Spjd } else if (dirty == ndisks) { 2312132904Spjd /* 2313132904Spjd * Force synchronization for all dirty disks except one 2314132904Spjd * with the biggest priority. 2315132904Spjd */ 2316132904Spjd KASSERT(pdisk != NULL, ("pdisk == NULL")); 2317132904Spjd G_MIRROR_DEBUG(1, "Using disk %s (device %s) as a " 2318132904Spjd "master disk for synchronization.", 2319132904Spjd g_mirror_get_diskname(pdisk), sc->sc_name); 2320132904Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 2321132904Spjd if (disk->d_sync.ds_syncid != syncid) 2322132904Spjd continue; 2323132904Spjd if ((disk->d_flags & 2324132904Spjd G_MIRROR_DISK_FLAG_SYNCHRONIZING) != 0) { 2325132904Spjd continue; 2326132904Spjd } 2327132904Spjd KASSERT((disk->d_flags & 2328132904Spjd G_MIRROR_DISK_FLAG_DIRTY) != 0, 2329132904Spjd ("Disk %s isn't marked as dirty.", 2330132904Spjd g_mirror_get_diskname(disk))); 2331132904Spjd /* Skip the disk with the biggest priority. */ 2332132904Spjd if (disk == pdisk) 2333132904Spjd continue; 2334132904Spjd disk->d_sync.ds_syncid = 0; 2335132904Spjd } 2336132904Spjd } else if (dirty < ndisks) { 2337132904Spjd /* 2338132904Spjd * Force synchronization for all dirty disks. 2339132904Spjd * We have some non-dirty disks. 2340132904Spjd */ 2341132904Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 2342132904Spjd if (disk->d_sync.ds_syncid != syncid) 2343132904Spjd continue; 2344132904Spjd if ((disk->d_flags & 2345132904Spjd G_MIRROR_DISK_FLAG_SYNCHRONIZING) != 0) { 2346132904Spjd continue; 2347132904Spjd } 2348132904Spjd if ((disk->d_flags & 2349132904Spjd G_MIRROR_DISK_FLAG_DIRTY) == 0) { 2350132904Spjd continue; 2351132904Spjd } 2352132904Spjd disk->d_sync.ds_syncid = 0; 2353132904Spjd } 2354132904Spjd } 2355132904Spjd 2356132904Spjd /* Reset hint. */ 2357132904Spjd sc->sc_hint = NULL; 2358132904Spjd sc->sc_syncid = syncid; 2359132904Spjd if (force) { 2360132904Spjd /* Remember to bump syncid on first write. */ 2361139670Spjd sc->sc_bump_id |= G_MIRROR_BUMP_SYNCID; 2362132904Spjd } 2363132904Spjd state = G_MIRROR_DEVICE_STATE_RUNNING; 2364132904Spjd G_MIRROR_DEBUG(1, "Device %s state changed from %s to %s.", 2365132904Spjd sc->sc_name, g_mirror_device_state2str(sc->sc_state), 2366132904Spjd g_mirror_device_state2str(state)); 2367132904Spjd sc->sc_state = state; 2368132904Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 2369132904Spjd state = g_mirror_determine_state(disk); 2370132904Spjd g_mirror_event_send(disk, state, 2371132904Spjd G_MIRROR_EVENT_DONTWAIT); 2372139213Spjd if (state == G_MIRROR_DISK_STATE_STALE) 2373139670Spjd sc->sc_bump_id |= G_MIRROR_BUMP_SYNCID; 2374132904Spjd } 2375132904Spjd break; 2376132904Spjd } 2377132904Spjd case G_MIRROR_DEVICE_STATE_RUNNING: 2378137248Spjd if (g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_ACTIVE) == 0 && 2379132904Spjd g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_NEW) == 0) { 2380132904Spjd /* 2381137248Spjd * No active disks or no disks at all, 2382137248Spjd * so destroy device. 2383132904Spjd */ 2384132904Spjd if (sc->sc_provider != NULL) 2385132904Spjd g_mirror_destroy_provider(sc); 2386137248Spjd sc->sc_flags |= G_MIRROR_DEVICE_FLAG_DESTROY; 2387133946Spjd break; 2388132904Spjd } else if (g_mirror_ndisks(sc, 2389132954Spjd G_MIRROR_DISK_STATE_ACTIVE) > 0 && 2390132954Spjd g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_NEW) == 0) { 2391132904Spjd /* 2392132904Spjd * We have active disks, launch provider if it doesn't 2393132904Spjd * exist. 2394132904Spjd */ 2395132904Spjd if (sc->sc_provider == NULL) 2396132904Spjd g_mirror_launch_provider(sc); 2397146624Spjd if (sc->sc_rootmount != NULL) { 2398146624Spjd G_MIRROR_DEBUG(1, "root_mount_rel[%u] %p", 2399146624Spjd __LINE__, sc->sc_rootmount); 2400146624Spjd root_mount_rel(sc->sc_rootmount); 2401146624Spjd sc->sc_rootmount = NULL; 2402146624Spjd } 2403132904Spjd } 2404133946Spjd /* 2405139670Spjd * Genid should be bumped immediately, so do it here. 2406133946Spjd */ 2407139670Spjd if ((sc->sc_bump_id & G_MIRROR_BUMP_GENID) != 0) { 2408139213Spjd sc->sc_bump_id &= ~G_MIRROR_BUMP_GENID; 2409139213Spjd g_mirror_bump_genid(sc); 2410139213Spjd } 2411132904Spjd break; 2412132904Spjd default: 2413132904Spjd KASSERT(1 == 0, ("Wrong device state (%s, %s).", 2414132904Spjd sc->sc_name, g_mirror_device_state2str(sc->sc_state))); 2415132904Spjd break; 2416132904Spjd } 2417132904Spjd} 2418132904Spjd 2419132904Spjd/* 2420132904Spjd * Update disk state and device state if needed. 2421132904Spjd */ 2422132904Spjd#define DISK_STATE_CHANGED() G_MIRROR_DEBUG(1, \ 2423132904Spjd "Disk %s state changed from %s to %s (device %s).", \ 2424132904Spjd g_mirror_get_diskname(disk), \ 2425132904Spjd g_mirror_disk_state2str(disk->d_state), \ 2426132904Spjd g_mirror_disk_state2str(state), sc->sc_name) 2427132904Spjdstatic int 2428139051Spjdg_mirror_update_disk(struct g_mirror_disk *disk, u_int state) 2429132904Spjd{ 2430132904Spjd struct g_mirror_softc *sc; 2431132904Spjd 2432156610Spjd sc = disk->d_softc; 2433156610Spjd sx_assert(&sc->sc_lock, SX_XLOCKED); 2434132904Spjd 2435132904Spjdagain: 2436132904Spjd G_MIRROR_DEBUG(3, "Changing disk %s state from %s to %s.", 2437132904Spjd g_mirror_get_diskname(disk), g_mirror_disk_state2str(disk->d_state), 2438132904Spjd g_mirror_disk_state2str(state)); 2439132904Spjd switch (state) { 2440132904Spjd case G_MIRROR_DISK_STATE_NEW: 2441132904Spjd /* 2442132904Spjd * Possible scenarios: 2443132904Spjd * 1. New disk arrive. 2444132904Spjd */ 2445132904Spjd /* Previous state should be NONE. */ 2446132904Spjd KASSERT(disk->d_state == G_MIRROR_DISK_STATE_NONE, 2447132904Spjd ("Wrong disk state (%s, %s).", g_mirror_get_diskname(disk), 2448132904Spjd g_mirror_disk_state2str(disk->d_state))); 2449132904Spjd DISK_STATE_CHANGED(); 2450132904Spjd 2451132904Spjd disk->d_state = state; 2452133115Spjd if (LIST_EMPTY(&sc->sc_disks)) 2453133115Spjd LIST_INSERT_HEAD(&sc->sc_disks, disk, d_next); 2454133115Spjd else { 2455133115Spjd struct g_mirror_disk *dp; 2456133115Spjd 2457133115Spjd LIST_FOREACH(dp, &sc->sc_disks, d_next) { 2458133115Spjd if (disk->d_priority >= dp->d_priority) { 2459133115Spjd LIST_INSERT_BEFORE(dp, disk, d_next); 2460133115Spjd dp = NULL; 2461133115Spjd break; 2462133115Spjd } 2463133115Spjd if (LIST_NEXT(dp, d_next) == NULL) 2464133115Spjd break; 2465133115Spjd } 2466133115Spjd if (dp != NULL) 2467133115Spjd LIST_INSERT_AFTER(dp, disk, d_next); 2468133115Spjd } 2469162188Sjmg G_MIRROR_DEBUG(1, "Device %s: provider %s detected.", 2470132904Spjd sc->sc_name, g_mirror_get_diskname(disk)); 2471132904Spjd if (sc->sc_state == G_MIRROR_DEVICE_STATE_STARTING) 2472132904Spjd break; 2473132904Spjd KASSERT(sc->sc_state == G_MIRROR_DEVICE_STATE_RUNNING, 2474132904Spjd ("Wrong device state (%s, %s, %s, %s).", sc->sc_name, 2475132904Spjd g_mirror_device_state2str(sc->sc_state), 2476132904Spjd g_mirror_get_diskname(disk), 2477132904Spjd g_mirror_disk_state2str(disk->d_state))); 2478132904Spjd state = g_mirror_determine_state(disk); 2479132904Spjd if (state != G_MIRROR_DISK_STATE_NONE) 2480132904Spjd goto again; 2481132904Spjd break; 2482132904Spjd case G_MIRROR_DISK_STATE_ACTIVE: 2483132904Spjd /* 2484132904Spjd * Possible scenarios: 2485132904Spjd * 1. New disk does not need synchronization. 2486132904Spjd * 2. Synchronization process finished successfully. 2487132904Spjd */ 2488132904Spjd KASSERT(sc->sc_state == G_MIRROR_DEVICE_STATE_RUNNING, 2489132904Spjd ("Wrong device state (%s, %s, %s, %s).", sc->sc_name, 2490132904Spjd g_mirror_device_state2str(sc->sc_state), 2491132904Spjd g_mirror_get_diskname(disk), 2492132904Spjd g_mirror_disk_state2str(disk->d_state))); 2493132904Spjd /* Previous state should be NEW or SYNCHRONIZING. */ 2494132904Spjd KASSERT(disk->d_state == G_MIRROR_DISK_STATE_NEW || 2495132904Spjd disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING, 2496132904Spjd ("Wrong disk state (%s, %s).", g_mirror_get_diskname(disk), 2497132904Spjd g_mirror_disk_state2str(disk->d_state))); 2498132904Spjd DISK_STATE_CHANGED(); 2499132904Spjd 2500155582Spjd if (disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING) { 2501132904Spjd disk->d_flags &= ~G_MIRROR_DISK_FLAG_SYNCHRONIZING; 2502132904Spjd disk->d_flags &= ~G_MIRROR_DISK_FLAG_FORCE_SYNC; 2503132904Spjd g_mirror_sync_stop(disk, 0); 2504132904Spjd } 2505132904Spjd disk->d_state = state; 2506132904Spjd disk->d_sync.ds_offset = 0; 2507132904Spjd disk->d_sync.ds_offset_done = 0; 2508155539Spjd g_mirror_update_idle(sc, disk); 2509155582Spjd g_mirror_update_metadata(disk); 2510162188Sjmg G_MIRROR_DEBUG(1, "Device %s: provider %s activated.", 2511132904Spjd sc->sc_name, g_mirror_get_diskname(disk)); 2512132904Spjd break; 2513132904Spjd case G_MIRROR_DISK_STATE_STALE: 2514132904Spjd /* 2515132904Spjd * Possible scenarios: 2516132904Spjd * 1. Stale disk was connected. 2517132904Spjd */ 2518132904Spjd /* Previous state should be NEW. */ 2519132904Spjd KASSERT(disk->d_state == G_MIRROR_DISK_STATE_NEW, 2520132904Spjd ("Wrong disk state (%s, %s).", g_mirror_get_diskname(disk), 2521132904Spjd g_mirror_disk_state2str(disk->d_state))); 2522132904Spjd KASSERT(sc->sc_state == G_MIRROR_DEVICE_STATE_RUNNING, 2523132904Spjd ("Wrong device state (%s, %s, %s, %s).", sc->sc_name, 2524132904Spjd g_mirror_device_state2str(sc->sc_state), 2525132904Spjd g_mirror_get_diskname(disk), 2526132904Spjd g_mirror_disk_state2str(disk->d_state))); 2527132904Spjd /* 2528132904Spjd * STALE state is only possible if device is marked 2529132904Spjd * NOAUTOSYNC. 2530132904Spjd */ 2531132904Spjd KASSERT((sc->sc_flags & G_MIRROR_DEVICE_FLAG_NOAUTOSYNC) != 0, 2532132904Spjd ("Wrong device state (%s, %s, %s, %s).", sc->sc_name, 2533132904Spjd g_mirror_device_state2str(sc->sc_state), 2534132904Spjd g_mirror_get_diskname(disk), 2535132904Spjd g_mirror_disk_state2str(disk->d_state))); 2536132904Spjd DISK_STATE_CHANGED(); 2537132904Spjd 2538132904Spjd disk->d_flags &= ~G_MIRROR_DISK_FLAG_DIRTY; 2539132904Spjd disk->d_state = state; 2540132904Spjd g_mirror_update_metadata(disk); 2541132904Spjd G_MIRROR_DEBUG(0, "Device %s: provider %s is stale.", 2542132904Spjd sc->sc_name, g_mirror_get_diskname(disk)); 2543132904Spjd break; 2544132904Spjd case G_MIRROR_DISK_STATE_SYNCHRONIZING: 2545132904Spjd /* 2546132904Spjd * Possible scenarios: 2547132904Spjd * 1. Disk which needs synchronization was connected. 2548132904Spjd */ 2549132904Spjd /* Previous state should be NEW. */ 2550132904Spjd KASSERT(disk->d_state == G_MIRROR_DISK_STATE_NEW, 2551132904Spjd ("Wrong disk state (%s, %s).", g_mirror_get_diskname(disk), 2552132904Spjd g_mirror_disk_state2str(disk->d_state))); 2553132904Spjd KASSERT(sc->sc_state == G_MIRROR_DEVICE_STATE_RUNNING, 2554132904Spjd ("Wrong device state (%s, %s, %s, %s).", sc->sc_name, 2555132904Spjd g_mirror_device_state2str(sc->sc_state), 2556132904Spjd g_mirror_get_diskname(disk), 2557132904Spjd g_mirror_disk_state2str(disk->d_state))); 2558132904Spjd DISK_STATE_CHANGED(); 2559132904Spjd 2560132904Spjd if (disk->d_state == G_MIRROR_DISK_STATE_NEW) 2561132904Spjd disk->d_flags &= ~G_MIRROR_DISK_FLAG_DIRTY; 2562132904Spjd disk->d_state = state; 2563132904Spjd if (sc->sc_provider != NULL) { 2564132904Spjd g_mirror_sync_start(disk); 2565132904Spjd g_mirror_update_metadata(disk); 2566132904Spjd } 2567132904Spjd break; 2568132904Spjd case G_MIRROR_DISK_STATE_DISCONNECTED: 2569132904Spjd /* 2570132904Spjd * Possible scenarios: 2571132904Spjd * 1. Device wasn't running yet, but disk disappear. 2572132904Spjd * 2. Disk was active and disapppear. 2573132904Spjd * 3. Disk disappear during synchronization process. 2574132904Spjd */ 2575132904Spjd if (sc->sc_state == G_MIRROR_DEVICE_STATE_RUNNING) { 2576132904Spjd /* 2577132904Spjd * Previous state should be ACTIVE, STALE or 2578132904Spjd * SYNCHRONIZING. 2579132904Spjd */ 2580132904Spjd KASSERT(disk->d_state == G_MIRROR_DISK_STATE_ACTIVE || 2581132904Spjd disk->d_state == G_MIRROR_DISK_STATE_STALE || 2582132904Spjd disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING, 2583132904Spjd ("Wrong disk state (%s, %s).", 2584132904Spjd g_mirror_get_diskname(disk), 2585132904Spjd g_mirror_disk_state2str(disk->d_state))); 2586132904Spjd } else if (sc->sc_state == G_MIRROR_DEVICE_STATE_STARTING) { 2587132904Spjd /* Previous state should be NEW. */ 2588132904Spjd KASSERT(disk->d_state == G_MIRROR_DISK_STATE_NEW, 2589132904Spjd ("Wrong disk state (%s, %s).", 2590132904Spjd g_mirror_get_diskname(disk), 2591132904Spjd g_mirror_disk_state2str(disk->d_state))); 2592132904Spjd /* 2593132904Spjd * Reset bumping syncid if disk disappeared in STARTING 2594132904Spjd * state. 2595132904Spjd */ 2596139670Spjd if ((sc->sc_bump_id & G_MIRROR_BUMP_SYNCID) != 0) 2597139213Spjd sc->sc_bump_id &= ~G_MIRROR_BUMP_SYNCID; 2598132904Spjd#ifdef INVARIANTS 2599132904Spjd } else { 2600132904Spjd KASSERT(1 == 0, ("Wrong device state (%s, %s, %s, %s).", 2601132904Spjd sc->sc_name, 2602132904Spjd g_mirror_device_state2str(sc->sc_state), 2603132904Spjd g_mirror_get_diskname(disk), 2604132904Spjd g_mirror_disk_state2str(disk->d_state))); 2605132904Spjd#endif 2606132904Spjd } 2607132904Spjd DISK_STATE_CHANGED(); 2608132904Spjd G_MIRROR_DEBUG(0, "Device %s: provider %s disconnected.", 2609132904Spjd sc->sc_name, g_mirror_get_diskname(disk)); 2610132904Spjd 2611132904Spjd g_mirror_destroy_disk(disk); 2612132904Spjd break; 2613132904Spjd case G_MIRROR_DISK_STATE_DESTROY: 2614132904Spjd { 2615132904Spjd int error; 2616132904Spjd 2617132904Spjd error = g_mirror_clear_metadata(disk); 2618132904Spjd if (error != 0) 2619132904Spjd return (error); 2620132904Spjd DISK_STATE_CHANGED(); 2621132904Spjd G_MIRROR_DEBUG(0, "Device %s: provider %s destroyed.", 2622132904Spjd sc->sc_name, g_mirror_get_diskname(disk)); 2623132904Spjd 2624132904Spjd g_mirror_destroy_disk(disk); 2625132904Spjd sc->sc_ndisks--; 2626132904Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 2627132904Spjd g_mirror_update_metadata(disk); 2628132904Spjd } 2629132904Spjd break; 2630132904Spjd } 2631132904Spjd default: 2632132904Spjd KASSERT(1 == 0, ("Unknown state (%u).", state)); 2633132904Spjd break; 2634132904Spjd } 2635132904Spjd return (0); 2636132904Spjd} 2637132904Spjd#undef DISK_STATE_CHANGED 2638132904Spjd 2639139650Spjdint 2640132904Spjdg_mirror_read_metadata(struct g_consumer *cp, struct g_mirror_metadata *md) 2641132904Spjd{ 2642132904Spjd struct g_provider *pp; 2643132904Spjd u_char *buf; 2644132904Spjd int error; 2645132904Spjd 2646132904Spjd g_topology_assert(); 2647132904Spjd 2648132904Spjd error = g_access(cp, 1, 0, 0); 2649132904Spjd if (error != 0) 2650132904Spjd return (error); 2651132904Spjd pp = cp->provider; 2652132904Spjd g_topology_unlock(); 2653132904Spjd /* Metadata are stored on last sector. */ 2654132904Spjd buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize, 2655132904Spjd &error); 2656132904Spjd g_topology_lock(); 2657139051Spjd g_access(cp, -1, 0, 0); 2658152967Ssobomax if (buf == NULL) { 2659139213Spjd G_MIRROR_DEBUG(1, "Cannot read metadata from %s (error=%d).", 2660139213Spjd cp->provider->name, error); 2661132904Spjd return (error); 2662132904Spjd } 2663132904Spjd 2664132904Spjd /* Decode metadata. */ 2665132904Spjd error = mirror_metadata_decode(buf, md); 2666132904Spjd g_free(buf); 2667132904Spjd if (strcmp(md->md_magic, G_MIRROR_MAGIC) != 0) 2668132904Spjd return (EINVAL); 2669139213Spjd if (md->md_version > G_MIRROR_VERSION) { 2670139213Spjd G_MIRROR_DEBUG(0, 2671139213Spjd "Kernel module is too old to handle metadata from %s.", 2672139213Spjd cp->provider->name); 2673139213Spjd return (EINVAL); 2674139213Spjd } 2675132904Spjd if (error != 0) { 2676132904Spjd G_MIRROR_DEBUG(1, "MD5 metadata hash mismatch for provider %s.", 2677132904Spjd cp->provider->name); 2678132904Spjd return (error); 2679132904Spjd } 2680132904Spjd 2681132904Spjd return (0); 2682132904Spjd} 2683132904Spjd 2684132904Spjdstatic int 2685132904Spjdg_mirror_check_metadata(struct g_mirror_softc *sc, struct g_provider *pp, 2686132904Spjd struct g_mirror_metadata *md) 2687132904Spjd{ 2688132904Spjd 2689132904Spjd if (g_mirror_id2disk(sc, md->md_did) != NULL) { 2690132904Spjd G_MIRROR_DEBUG(1, "Disk %s (id=%u) already exists, skipping.", 2691132904Spjd pp->name, md->md_did); 2692132904Spjd return (EEXIST); 2693132904Spjd } 2694132904Spjd if (md->md_all != sc->sc_ndisks) { 2695132904Spjd G_MIRROR_DEBUG(1, 2696132904Spjd "Invalid '%s' field on disk %s (device %s), skipping.", 2697132904Spjd "md_all", pp->name, sc->sc_name); 2698132904Spjd return (EINVAL); 2699132904Spjd } 2700132904Spjd if (md->md_slice != sc->sc_slice) { 2701132904Spjd G_MIRROR_DEBUG(1, 2702132904Spjd "Invalid '%s' field on disk %s (device %s), skipping.", 2703132904Spjd "md_slice", pp->name, sc->sc_name); 2704132904Spjd return (EINVAL); 2705132904Spjd } 2706132904Spjd if (md->md_balance != sc->sc_balance) { 2707132904Spjd G_MIRROR_DEBUG(1, 2708132904Spjd "Invalid '%s' field on disk %s (device %s), skipping.", 2709132904Spjd "md_balance", pp->name, sc->sc_name); 2710132904Spjd return (EINVAL); 2711132904Spjd } 2712132904Spjd if (md->md_mediasize != sc->sc_mediasize) { 2713132904Spjd G_MIRROR_DEBUG(1, 2714132904Spjd "Invalid '%s' field on disk %s (device %s), skipping.", 2715132904Spjd "md_mediasize", pp->name, sc->sc_name); 2716132904Spjd return (EINVAL); 2717132904Spjd } 2718132904Spjd if (sc->sc_mediasize > pp->mediasize) { 2719132904Spjd G_MIRROR_DEBUG(1, 2720132904Spjd "Invalid size of disk %s (device %s), skipping.", pp->name, 2721132904Spjd sc->sc_name); 2722132904Spjd return (EINVAL); 2723132904Spjd } 2724132904Spjd if (md->md_sectorsize != sc->sc_sectorsize) { 2725132904Spjd G_MIRROR_DEBUG(1, 2726132904Spjd "Invalid '%s' field on disk %s (device %s), skipping.", 2727132904Spjd "md_sectorsize", pp->name, sc->sc_name); 2728132904Spjd return (EINVAL); 2729132904Spjd } 2730132904Spjd if ((sc->sc_sectorsize % pp->sectorsize) != 0) { 2731132904Spjd G_MIRROR_DEBUG(1, 2732132904Spjd "Invalid sector size of disk %s (device %s), skipping.", 2733132904Spjd pp->name, sc->sc_name); 2734132904Spjd return (EINVAL); 2735132904Spjd } 2736132904Spjd if ((md->md_mflags & ~G_MIRROR_DEVICE_FLAG_MASK) != 0) { 2737132904Spjd G_MIRROR_DEBUG(1, 2738132904Spjd "Invalid device flags on disk %s (device %s), skipping.", 2739132904Spjd pp->name, sc->sc_name); 2740132904Spjd return (EINVAL); 2741132904Spjd } 2742132904Spjd if ((md->md_dflags & ~G_MIRROR_DISK_FLAG_MASK) != 0) { 2743132904Spjd G_MIRROR_DEBUG(1, 2744132904Spjd "Invalid disk flags on disk %s (device %s), skipping.", 2745132904Spjd pp->name, sc->sc_name); 2746132904Spjd return (EINVAL); 2747132904Spjd } 2748132904Spjd return (0); 2749132904Spjd} 2750132904Spjd 2751139650Spjdint 2752132904Spjdg_mirror_add_disk(struct g_mirror_softc *sc, struct g_provider *pp, 2753132904Spjd struct g_mirror_metadata *md) 2754132904Spjd{ 2755132904Spjd struct g_mirror_disk *disk; 2756132904Spjd int error; 2757132904Spjd 2758156610Spjd g_topology_assert_not(); 2759132904Spjd G_MIRROR_DEBUG(2, "Adding disk %s.", pp->name); 2760132904Spjd 2761132904Spjd error = g_mirror_check_metadata(sc, pp, md); 2762132904Spjd if (error != 0) 2763132904Spjd return (error); 2764139213Spjd if (sc->sc_state == G_MIRROR_DEVICE_STATE_RUNNING && 2765139213Spjd md->md_genid < sc->sc_genid) { 2766139213Spjd G_MIRROR_DEBUG(0, "Component %s (device %s) broken, skipping.", 2767139213Spjd pp->name, sc->sc_name); 2768139213Spjd return (EINVAL); 2769139213Spjd } 2770132904Spjd disk = g_mirror_init_disk(sc, pp, md, &error); 2771132904Spjd if (disk == NULL) 2772132904Spjd return (error); 2773132904Spjd error = g_mirror_event_send(disk, G_MIRROR_DISK_STATE_NEW, 2774132904Spjd G_MIRROR_EVENT_WAIT); 2775139213Spjd if (error != 0) 2776139213Spjd return (error); 2777139213Spjd if (md->md_version < G_MIRROR_VERSION) { 2778139213Spjd G_MIRROR_DEBUG(0, "Upgrading metadata on %s (v%d->v%d).", 2779139213Spjd pp->name, md->md_version, G_MIRROR_VERSION); 2780139213Spjd g_mirror_update_metadata(disk); 2781139213Spjd } 2782139213Spjd return (0); 2783132904Spjd} 2784132904Spjd 2785157630Spjdstatic void 2786157630Spjdg_mirror_destroy_delayed(void *arg, int flag) 2787157630Spjd{ 2788157630Spjd struct g_mirror_softc *sc; 2789157630Spjd int error; 2790157630Spjd 2791157630Spjd if (flag == EV_CANCEL) { 2792157630Spjd G_MIRROR_DEBUG(1, "Destroying canceled."); 2793157630Spjd return; 2794157630Spjd } 2795157630Spjd sc = arg; 2796157630Spjd g_topology_unlock(); 2797157630Spjd sx_xlock(&sc->sc_lock); 2798157630Spjd KASSERT((sc->sc_flags & G_MIRROR_DEVICE_FLAG_DESTROY) == 0, 2799157630Spjd ("DESTROY flag set on %s.", sc->sc_name)); 2800157630Spjd KASSERT((sc->sc_flags & G_MIRROR_DEVICE_FLAG_DESTROYING) != 0, 2801157630Spjd ("DESTROYING flag not set on %s.", sc->sc_name)); 2802157630Spjd G_MIRROR_DEBUG(1, "Destroying %s (delayed).", sc->sc_name); 2803157630Spjd error = g_mirror_destroy(sc, G_MIRROR_DESTROY_SOFT); 2804157630Spjd if (error != 0) { 2805264715Sbdrewery G_MIRROR_DEBUG(0, "Cannot destroy %s (error=%d).", 2806264715Sbdrewery sc->sc_name, error); 2807157630Spjd sx_xunlock(&sc->sc_lock); 2808157630Spjd } 2809157630Spjd g_topology_lock(); 2810157630Spjd} 2811157630Spjd 2812132904Spjdstatic int 2813132904Spjdg_mirror_access(struct g_provider *pp, int acr, int acw, int ace) 2814132904Spjd{ 2815132904Spjd struct g_mirror_softc *sc; 2816157630Spjd int dcr, dcw, dce, error = 0; 2817132904Spjd 2818132904Spjd g_topology_assert(); 2819132904Spjd G_MIRROR_DEBUG(2, "Access request for %s: r%dw%de%d.", pp->name, acr, 2820132904Spjd acw, ace); 2821132904Spjd 2822160081Spjd sc = pp->geom->softc; 2823160081Spjd if (sc == NULL && acr <= 0 && acw <= 0 && ace <= 0) 2824160081Spjd return (0); 2825160081Spjd KASSERT(sc != NULL, ("NULL softc (provider=%s).", pp->name)); 2826160081Spjd 2827132904Spjd dcr = pp->acr + acr; 2828132904Spjd dcw = pp->acw + acw; 2829132904Spjd dce = pp->ace + ace; 2830132904Spjd 2831157630Spjd g_topology_unlock(); 2832157630Spjd sx_xlock(&sc->sc_lock); 2833157630Spjd if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_DESTROY) != 0 || 2834157630Spjd LIST_EMPTY(&sc->sc_disks)) { 2835157630Spjd if (acr > 0 || acw > 0 || ace > 0) 2836157630Spjd error = ENXIO; 2837157630Spjd goto end; 2838132904Spjd } 2839246076Smav if (dcw == 0) 2840156610Spjd g_mirror_idle(sc, dcw); 2841157630Spjd if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_DESTROYING) != 0) { 2842157630Spjd if (acr > 0 || acw > 0 || ace > 0) { 2843157630Spjd error = ENXIO; 2844157630Spjd goto end; 2845157630Spjd } 2846157630Spjd if (dcr == 0 && dcw == 0 && dce == 0) { 2847157630Spjd g_post_event(g_mirror_destroy_delayed, sc, M_WAITOK, 2848157630Spjd sc, NULL); 2849157630Spjd } 2850156610Spjd } 2851157630Spjdend: 2852157630Spjd sx_xunlock(&sc->sc_lock); 2853157630Spjd g_topology_lock(); 2854157630Spjd return (error); 2855132904Spjd} 2856132904Spjd 2857132904Spjdstatic struct g_geom * 2858132904Spjdg_mirror_create(struct g_class *mp, const struct g_mirror_metadata *md) 2859132904Spjd{ 2860132904Spjd struct g_mirror_softc *sc; 2861132904Spjd struct g_geom *gp; 2862132904Spjd int error, timeout; 2863132904Spjd 2864132904Spjd g_topology_assert(); 2865132904Spjd G_MIRROR_DEBUG(1, "Creating device %s (id=%u).", md->md_name, 2866132904Spjd md->md_mid); 2867132904Spjd 2868132904Spjd /* One disk is minimum. */ 2869132904Spjd if (md->md_all < 1) 2870132904Spjd return (NULL); 2871132904Spjd /* 2872132904Spjd * Action geom. 2873132904Spjd */ 2874132904Spjd gp = g_new_geomf(mp, "%s", md->md_name); 2875132904Spjd sc = malloc(sizeof(*sc), M_MIRROR, M_WAITOK | M_ZERO); 2876132904Spjd gp->start = g_mirror_start; 2877132904Spjd gp->orphan = g_mirror_orphan; 2878132904Spjd gp->access = g_mirror_access; 2879132904Spjd gp->dumpconf = g_mirror_dumpconf; 2880132904Spjd 2881132904Spjd sc->sc_id = md->md_mid; 2882132904Spjd sc->sc_slice = md->md_slice; 2883132904Spjd sc->sc_balance = md->md_balance; 2884132904Spjd sc->sc_mediasize = md->md_mediasize; 2885132904Spjd sc->sc_sectorsize = md->md_sectorsize; 2886132904Spjd sc->sc_ndisks = md->md_all; 2887132904Spjd sc->sc_flags = md->md_mflags; 2888139213Spjd sc->sc_bump_id = 0; 2889155539Spjd sc->sc_idle = 1; 2890155581Spjd sc->sc_last_write = time_uptime; 2891155539Spjd sc->sc_writes = 0; 2892156610Spjd sx_init(&sc->sc_lock, "gmirror:lock"); 2893132904Spjd bioq_init(&sc->sc_queue); 2894132904Spjd mtx_init(&sc->sc_queue_mtx, "gmirror:queue", NULL, MTX_DEF); 2895156610Spjd bioq_init(&sc->sc_regular_delayed); 2896156610Spjd bioq_init(&sc->sc_inflight); 2897156610Spjd bioq_init(&sc->sc_sync_delayed); 2898132904Spjd LIST_INIT(&sc->sc_disks); 2899132904Spjd TAILQ_INIT(&sc->sc_events); 2900132904Spjd mtx_init(&sc->sc_events_mtx, "gmirror:events", NULL, MTX_DEF); 2901132904Spjd callout_init(&sc->sc_callout, CALLOUT_MPSAFE); 2902132904Spjd sc->sc_state = G_MIRROR_DEVICE_STATE_STARTING; 2903132904Spjd gp->softc = sc; 2904132904Spjd sc->sc_geom = gp; 2905132904Spjd sc->sc_provider = NULL; 2906132904Spjd /* 2907132904Spjd * Synchronization geom. 2908132904Spjd */ 2909132904Spjd gp = g_new_geomf(mp, "%s.sync", md->md_name); 2910132904Spjd gp->softc = sc; 2911132904Spjd gp->orphan = g_mirror_orphan; 2912132904Spjd sc->sc_sync.ds_geom = gp; 2913132904Spjd sc->sc_sync.ds_ndisks = 0; 2914172836Sjulian error = kproc_create(g_mirror_worker, sc, &sc->sc_worker, 0, 0, 2915132904Spjd "g_mirror %s", md->md_name); 2916132904Spjd if (error != 0) { 2917132904Spjd G_MIRROR_DEBUG(1, "Cannot create kernel thread for %s.", 2918132904Spjd sc->sc_name); 2919132904Spjd g_destroy_geom(sc->sc_sync.ds_geom); 2920132904Spjd mtx_destroy(&sc->sc_events_mtx); 2921132904Spjd mtx_destroy(&sc->sc_queue_mtx); 2922156610Spjd sx_destroy(&sc->sc_lock); 2923132904Spjd g_destroy_geom(sc->sc_geom); 2924132904Spjd free(sc, M_MIRROR); 2925132904Spjd return (NULL); 2926132904Spjd } 2927132904Spjd 2928162188Sjmg G_MIRROR_DEBUG(1, "Device %s created (%u components, id=%u).", 2929162188Sjmg sc->sc_name, sc->sc_ndisks, sc->sc_id); 2930132904Spjd 2931190878Sthompsa sc->sc_rootmount = root_mount_hold("GMIRROR"); 2932146538Spjd G_MIRROR_DEBUG(1, "root_mount_hold %p", sc->sc_rootmount); 2933132904Spjd /* 2934132904Spjd * Run timeout. 2935132904Spjd */ 2936137251Spjd timeout = g_mirror_timeout * hz; 2937137251Spjd callout_reset(&sc->sc_callout, timeout, g_mirror_go, sc); 2938132904Spjd return (sc->sc_geom); 2939132904Spjd} 2940132904Spjd 2941132904Spjdint 2942157630Spjdg_mirror_destroy(struct g_mirror_softc *sc, int how) 2943132904Spjd{ 2944157630Spjd struct g_mirror_disk *disk; 2945132904Spjd struct g_provider *pp; 2946132904Spjd 2947156610Spjd g_topology_assert_not(); 2948132904Spjd if (sc == NULL) 2949132904Spjd return (ENXIO); 2950156610Spjd sx_assert(&sc->sc_lock, SX_XLOCKED); 2951156610Spjd 2952132904Spjd pp = sc->sc_provider; 2953132904Spjd if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) { 2954157630Spjd switch (how) { 2955157630Spjd case G_MIRROR_DESTROY_SOFT: 2956132904Spjd G_MIRROR_DEBUG(1, 2957132904Spjd "Device %s is still open (r%dw%de%d).", pp->name, 2958132904Spjd pp->acr, pp->acw, pp->ace); 2959132904Spjd return (EBUSY); 2960157630Spjd case G_MIRROR_DESTROY_DELAYED: 2961157630Spjd G_MIRROR_DEBUG(1, 2962157630Spjd "Device %s will be destroyed on last close.", 2963157630Spjd pp->name); 2964157630Spjd LIST_FOREACH(disk, &sc->sc_disks, d_next) { 2965157630Spjd if (disk->d_state == 2966157630Spjd G_MIRROR_DISK_STATE_SYNCHRONIZING) { 2967157630Spjd g_mirror_sync_stop(disk, 1); 2968157630Spjd } 2969157630Spjd } 2970157630Spjd sc->sc_flags |= G_MIRROR_DEVICE_FLAG_DESTROYING; 2971157630Spjd return (EBUSY); 2972157630Spjd case G_MIRROR_DESTROY_HARD: 2973157630Spjd G_MIRROR_DEBUG(1, "Device %s is still open, so it " 2974157630Spjd "can't be definitely removed.", pp->name); 2975132904Spjd } 2976132904Spjd } 2977132904Spjd 2978158112Spjd g_topology_lock(); 2979158112Spjd if (sc->sc_geom->softc == NULL) { 2980158112Spjd g_topology_unlock(); 2981158112Spjd return (0); 2982158112Spjd } 2983158112Spjd sc->sc_geom->softc = NULL; 2984158112Spjd sc->sc_sync.ds_geom->softc = NULL; 2985158112Spjd g_topology_unlock(); 2986158112Spjd 2987132904Spjd sc->sc_flags |= G_MIRROR_DEVICE_FLAG_DESTROY; 2988132904Spjd sc->sc_flags |= G_MIRROR_DEVICE_FLAG_WAIT; 2989132904Spjd G_MIRROR_DEBUG(4, "%s: Waking up %p.", __func__, sc); 2990156610Spjd sx_xunlock(&sc->sc_lock); 2991132904Spjd mtx_lock(&sc->sc_queue_mtx); 2992132904Spjd wakeup(sc); 2993132904Spjd mtx_unlock(&sc->sc_queue_mtx); 2994132904Spjd G_MIRROR_DEBUG(4, "%s: Sleeping %p.", __func__, &sc->sc_worker); 2995132904Spjd while (sc->sc_worker != NULL) 2996132904Spjd tsleep(&sc->sc_worker, PRIBIO, "m:destroy", hz / 5); 2997132904Spjd G_MIRROR_DEBUG(4, "%s: Woken up %p.", __func__, &sc->sc_worker); 2998156610Spjd sx_xlock(&sc->sc_lock); 2999132904Spjd g_mirror_destroy_device(sc); 3000132904Spjd free(sc, M_MIRROR); 3001132904Spjd return (0); 3002132904Spjd} 3003132904Spjd 3004132904Spjdstatic void 3005132904Spjdg_mirror_taste_orphan(struct g_consumer *cp) 3006132904Spjd{ 3007132904Spjd 3008132904Spjd KASSERT(1 == 0, ("%s called while tasting %s.", __func__, 3009132904Spjd cp->provider->name)); 3010132904Spjd} 3011132904Spjd 3012132904Spjdstatic struct g_geom * 3013132904Spjdg_mirror_taste(struct g_class *mp, struct g_provider *pp, int flags __unused) 3014132904Spjd{ 3015132904Spjd struct g_mirror_metadata md; 3016132904Spjd struct g_mirror_softc *sc; 3017132904Spjd struct g_consumer *cp; 3018132904Spjd struct g_geom *gp; 3019132904Spjd int error; 3020132904Spjd 3021132904Spjd g_topology_assert(); 3022132904Spjd g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name); 3023132904Spjd G_MIRROR_DEBUG(2, "Tasting %s.", pp->name); 3024132904Spjd 3025132904Spjd gp = g_new_geomf(mp, "mirror:taste"); 3026132904Spjd /* 3027132904Spjd * This orphan function should be never called. 3028132904Spjd */ 3029132904Spjd gp->orphan = g_mirror_taste_orphan; 3030132904Spjd cp = g_new_consumer(gp); 3031132904Spjd g_attach(cp, pp); 3032132904Spjd error = g_mirror_read_metadata(cp, &md); 3033132904Spjd g_detach(cp); 3034132904Spjd g_destroy_consumer(cp); 3035132904Spjd g_destroy_geom(gp); 3036132904Spjd if (error != 0) 3037132904Spjd return (NULL); 3038132904Spjd gp = NULL; 3039132904Spjd 3040221101Smav if (md.md_provider[0] != '\0' && 3041221101Smav !g_compare_names(md.md_provider, pp->name)) 3042133373Spjd return (NULL); 3043142727Spjd if (md.md_provsize != 0 && md.md_provsize != pp->mediasize) 3044142727Spjd return (NULL); 3045132904Spjd if ((md.md_dflags & G_MIRROR_DISK_FLAG_INACTIVE) != 0) { 3046132904Spjd G_MIRROR_DEBUG(0, 3047132904Spjd "Device %s: provider %s marked as inactive, skipping.", 3048132904Spjd md.md_name, pp->name); 3049132904Spjd return (NULL); 3050132904Spjd } 3051132904Spjd if (g_mirror_debug >= 2) 3052132904Spjd mirror_metadata_dump(&md); 3053132904Spjd 3054132904Spjd /* 3055132904Spjd * Let's check if device already exists. 3056132904Spjd */ 3057134486Spjd sc = NULL; 3058132904Spjd LIST_FOREACH(gp, &mp->geom, geom) { 3059132904Spjd sc = gp->softc; 3060132904Spjd if (sc == NULL) 3061132904Spjd continue; 3062132904Spjd if (sc->sc_sync.ds_geom == gp) 3063132904Spjd continue; 3064132904Spjd if (strcmp(md.md_name, sc->sc_name) != 0) 3065132904Spjd continue; 3066132904Spjd if (md.md_mid != sc->sc_id) { 3067132904Spjd G_MIRROR_DEBUG(0, "Device %s already configured.", 3068132904Spjd sc->sc_name); 3069132904Spjd return (NULL); 3070132904Spjd } 3071132904Spjd break; 3072132904Spjd } 3073132904Spjd if (gp == NULL) { 3074132904Spjd gp = g_mirror_create(mp, &md); 3075132904Spjd if (gp == NULL) { 3076132976Spjd G_MIRROR_DEBUG(0, "Cannot create device %s.", 3077132904Spjd md.md_name); 3078132904Spjd return (NULL); 3079132904Spjd } 3080132904Spjd sc = gp->softc; 3081132904Spjd } 3082132904Spjd G_MIRROR_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); 3083156610Spjd g_topology_unlock(); 3084156610Spjd sx_xlock(&sc->sc_lock); 3085235968Sae sc->sc_flags |= G_MIRROR_DEVICE_FLAG_TASTING; 3086132904Spjd error = g_mirror_add_disk(sc, pp, &md); 3087132904Spjd if (error != 0) { 3088132904Spjd G_MIRROR_DEBUG(0, "Cannot add disk %s to %s (error=%d).", 3089132904Spjd pp->name, gp->name, error); 3090156610Spjd if (LIST_EMPTY(&sc->sc_disks)) { 3091157630Spjd g_cancel_event(sc); 3092160248Spjd g_mirror_destroy(sc, G_MIRROR_DESTROY_HARD); 3093156610Spjd g_topology_lock(); 3094156610Spjd return (NULL); 3095156610Spjd } 3096156610Spjd gp = NULL; 3097132904Spjd } 3098235968Sae sc->sc_flags &= ~G_MIRROR_DEVICE_FLAG_TASTING; 3099235968Sae if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_DESTROY) != 0) { 3100235968Sae g_mirror_destroy(sc, G_MIRROR_DESTROY_HARD); 3101235968Sae g_topology_lock(); 3102235968Sae return (NULL); 3103235968Sae } 3104156610Spjd sx_xunlock(&sc->sc_lock); 3105156610Spjd g_topology_lock(); 3106132904Spjd return (gp); 3107132904Spjd} 3108132904Spjd 3109132904Spjdstatic int 3110132904Spjdg_mirror_destroy_geom(struct gctl_req *req __unused, 3111132904Spjd struct g_class *mp __unused, struct g_geom *gp) 3112132904Spjd{ 3113156610Spjd struct g_mirror_softc *sc; 3114156610Spjd int error; 3115132904Spjd 3116156610Spjd g_topology_unlock(); 3117156610Spjd sc = gp->softc; 3118156610Spjd sx_xlock(&sc->sc_lock); 3119157630Spjd g_cancel_event(sc); 3120160248Spjd error = g_mirror_destroy(gp->softc, G_MIRROR_DESTROY_SOFT); 3121156610Spjd if (error != 0) 3122156610Spjd sx_xunlock(&sc->sc_lock); 3123156610Spjd g_topology_lock(); 3124156610Spjd return (error); 3125132904Spjd} 3126132904Spjd 3127132904Spjdstatic void 3128132904Spjdg_mirror_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 3129132904Spjd struct g_consumer *cp, struct g_provider *pp) 3130132904Spjd{ 3131132904Spjd struct g_mirror_softc *sc; 3132132904Spjd 3133132904Spjd g_topology_assert(); 3134132904Spjd 3135132904Spjd sc = gp->softc; 3136132904Spjd if (sc == NULL) 3137132904Spjd return; 3138132904Spjd /* Skip synchronization geom. */ 3139132904Spjd if (gp == sc->sc_sync.ds_geom) 3140132904Spjd return; 3141132904Spjd if (pp != NULL) { 3142132904Spjd /* Nothing here. */ 3143132904Spjd } else if (cp != NULL) { 3144132904Spjd struct g_mirror_disk *disk; 3145132904Spjd 3146132904Spjd disk = cp->private; 3147132904Spjd if (disk == NULL) 3148132904Spjd return; 3149156610Spjd g_topology_unlock(); 3150156610Spjd sx_xlock(&sc->sc_lock); 3151132904Spjd sbuf_printf(sb, "%s<ID>%u</ID>\n", indent, (u_int)disk->d_id); 3152132904Spjd if (disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING) { 3153132904Spjd sbuf_printf(sb, "%s<Synchronized>", indent); 3154156610Spjd if (disk->d_sync.ds_offset == 0) 3155132904Spjd sbuf_printf(sb, "0%%"); 3156132904Spjd else { 3157132904Spjd sbuf_printf(sb, "%u%%", 3158156610Spjd (u_int)((disk->d_sync.ds_offset * 100) / 3159132904Spjd sc->sc_provider->mediasize)); 3160132904Spjd } 3161132904Spjd sbuf_printf(sb, "</Synchronized>\n"); 3162240604Sglebius if (disk->d_sync.ds_offset > 0) { 3163240604Sglebius sbuf_printf(sb, "%s<BytesSynced>%jd" 3164240604Sglebius "</BytesSynced>\n", indent, 3165240604Sglebius (intmax_t)disk->d_sync.ds_offset); 3166240604Sglebius } 3167132904Spjd } 3168132904Spjd sbuf_printf(sb, "%s<SyncID>%u</SyncID>\n", indent, 3169132904Spjd disk->d_sync.ds_syncid); 3170139213Spjd sbuf_printf(sb, "%s<GenID>%u</GenID>\n", indent, 3171139213Spjd disk->d_genid); 3172132904Spjd sbuf_printf(sb, "%s<Flags>", indent); 3173132904Spjd if (disk->d_flags == 0) 3174132904Spjd sbuf_printf(sb, "NONE"); 3175132904Spjd else { 3176132904Spjd int first = 1; 3177132904Spjd 3178133448Spjd#define ADD_FLAG(flag, name) do { \ 3179133448Spjd if ((disk->d_flags & (flag)) != 0) { \ 3180133448Spjd if (!first) \ 3181133448Spjd sbuf_printf(sb, ", "); \ 3182133448Spjd else \ 3183133448Spjd first = 0; \ 3184133448Spjd sbuf_printf(sb, name); \ 3185133448Spjd } \ 3186133448Spjd} while (0) 3187133448Spjd ADD_FLAG(G_MIRROR_DISK_FLAG_DIRTY, "DIRTY"); 3188133448Spjd ADD_FLAG(G_MIRROR_DISK_FLAG_HARDCODED, "HARDCODED"); 3189133448Spjd ADD_FLAG(G_MIRROR_DISK_FLAG_INACTIVE, "INACTIVE"); 3190133448Spjd ADD_FLAG(G_MIRROR_DISK_FLAG_SYNCHRONIZING, 3191133448Spjd "SYNCHRONIZING"); 3192133448Spjd ADD_FLAG(G_MIRROR_DISK_FLAG_FORCE_SYNC, "FORCE_SYNC"); 3193155545Spjd ADD_FLAG(G_MIRROR_DISK_FLAG_BROKEN, "BROKEN"); 3194133448Spjd#undef ADD_FLAG 3195132904Spjd } 3196132904Spjd sbuf_printf(sb, "</Flags>\n"); 3197132904Spjd sbuf_printf(sb, "%s<Priority>%u</Priority>\n", indent, 3198132907Spjd disk->d_priority); 3199132904Spjd sbuf_printf(sb, "%s<State>%s</State>\n", indent, 3200132904Spjd g_mirror_disk_state2str(disk->d_state)); 3201156610Spjd sx_xunlock(&sc->sc_lock); 3202156610Spjd g_topology_lock(); 3203132904Spjd } else { 3204156610Spjd g_topology_unlock(); 3205156610Spjd sx_xlock(&sc->sc_lock); 3206132904Spjd sbuf_printf(sb, "%s<ID>%u</ID>\n", indent, (u_int)sc->sc_id); 3207132904Spjd sbuf_printf(sb, "%s<SyncID>%u</SyncID>\n", indent, sc->sc_syncid); 3208139213Spjd sbuf_printf(sb, "%s<GenID>%u</GenID>\n", indent, sc->sc_genid); 3209132904Spjd sbuf_printf(sb, "%s<Flags>", indent); 3210132904Spjd if (sc->sc_flags == 0) 3211132904Spjd sbuf_printf(sb, "NONE"); 3212132904Spjd else { 3213132904Spjd int first = 1; 3214132904Spjd 3215133448Spjd#define ADD_FLAG(flag, name) do { \ 3216133448Spjd if ((sc->sc_flags & (flag)) != 0) { \ 3217133448Spjd if (!first) \ 3218133448Spjd sbuf_printf(sb, ", "); \ 3219133448Spjd else \ 3220133448Spjd first = 0; \ 3221133448Spjd sbuf_printf(sb, name); \ 3222133448Spjd } \ 3223133448Spjd} while (0) 3224163888Spjd ADD_FLAG(G_MIRROR_DEVICE_FLAG_NOFAILSYNC, "NOFAILSYNC"); 3225133448Spjd ADD_FLAG(G_MIRROR_DEVICE_FLAG_NOAUTOSYNC, "NOAUTOSYNC"); 3226133448Spjd#undef ADD_FLAG 3227132904Spjd } 3228132904Spjd sbuf_printf(sb, "</Flags>\n"); 3229132904Spjd sbuf_printf(sb, "%s<Slice>%u</Slice>\n", indent, 3230132904Spjd (u_int)sc->sc_slice); 3231132904Spjd sbuf_printf(sb, "%s<Balance>%s</Balance>\n", indent, 3232132904Spjd balance_name(sc->sc_balance)); 3233132904Spjd sbuf_printf(sb, "%s<Components>%u</Components>\n", indent, 3234132904Spjd sc->sc_ndisks); 3235134957Spjd sbuf_printf(sb, "%s<State>", indent); 3236134957Spjd if (sc->sc_state == G_MIRROR_DEVICE_STATE_STARTING) 3237134957Spjd sbuf_printf(sb, "%s", "STARTING"); 3238134957Spjd else if (sc->sc_ndisks == 3239134957Spjd g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_ACTIVE)) 3240134957Spjd sbuf_printf(sb, "%s", "COMPLETE"); 3241134957Spjd else 3242134957Spjd sbuf_printf(sb, "%s", "DEGRADED"); 3243134957Spjd sbuf_printf(sb, "</State>\n"); 3244156610Spjd sx_xunlock(&sc->sc_lock); 3245156610Spjd g_topology_lock(); 3246132904Spjd } 3247132904Spjd} 3248132904Spjd 3249137254Spjdstatic void 3250246076Smavg_mirror_shutdown_post_sync(void *arg, int howto) 3251137254Spjd{ 3252137254Spjd struct g_class *mp; 3253137254Spjd struct g_geom *gp, *gp2; 3254156610Spjd struct g_mirror_softc *sc; 3255157630Spjd int error; 3256137254Spjd 3257137254Spjd mp = arg; 3258137421Spjd DROP_GIANT(); 3259137254Spjd g_topology_lock(); 3260246076Smav g_mirror_shutdown = 1; 3261137254Spjd LIST_FOREACH_SAFE(gp, &mp->geom, geom, gp2) { 3262156610Spjd if ((sc = gp->softc) == NULL) 3263137254Spjd continue; 3264157630Spjd /* Skip synchronization geom. */ 3265157630Spjd if (gp == sc->sc_sync.ds_geom) 3266156610Spjd continue; 3267156610Spjd g_topology_unlock(); 3268156610Spjd sx_xlock(&sc->sc_lock); 3269246076Smav g_mirror_idle(sc, -1); 3270157630Spjd g_cancel_event(sc); 3271157630Spjd error = g_mirror_destroy(sc, G_MIRROR_DESTROY_DELAYED); 3272157630Spjd if (error != 0) 3273157630Spjd sx_xunlock(&sc->sc_lock); 3274156610Spjd g_topology_lock(); 3275156610Spjd } 3276156610Spjd g_topology_unlock(); 3277156610Spjd PICKUP_GIANT(); 3278137254Spjd} 3279137254Spjd 3280137254Spjdstatic void 3281137254Spjdg_mirror_init(struct g_class *mp) 3282137254Spjd{ 3283137254Spjd 3284246076Smav g_mirror_post_sync = EVENTHANDLER_REGISTER(shutdown_post_sync, 3285246076Smav g_mirror_shutdown_post_sync, mp, SHUTDOWN_PRI_FIRST); 3286246076Smav if (g_mirror_post_sync == NULL) 3287137254Spjd G_MIRROR_DEBUG(0, "Warning! Cannot register shutdown event."); 3288137254Spjd} 3289137254Spjd 3290137254Spjdstatic void 3291137254Spjdg_mirror_fini(struct g_class *mp) 3292137254Spjd{ 3293137254Spjd 3294246076Smav if (g_mirror_post_sync != NULL) 3295246076Smav EVENTHANDLER_DEREGISTER(shutdown_post_sync, g_mirror_post_sync); 3296137254Spjd} 3297137254Spjd 3298132904SpjdDECLARE_GEOM_CLASS(g_mirror_class, g_mirror); 3299