2 * Copyright (c) 2004-2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/kernel.h>
33 #include <sys/module.h>
34 #include <sys/limits.h>
36 #include <sys/mutex.h>
39 #include <sys/sysctl.h>
40 #include <sys/malloc.h>
41 #include <sys/eventhandler.h>
43 #include <geom/geom.h>
45 #include <sys/kthread.h>
46 #include <sys/sched.h>
47 #include <geom/mirror/g_mirror.h>
49 FEATURE(geom_mirror, "GEOM mirroring support");
51 static MALLOC_DEFINE(M_MIRROR, "mirror_data", "GEOM_MIRROR Data");
53 SYSCTL_DECL(_kern_geom);
54 static SYSCTL_NODE(_kern_geom, OID_AUTO, mirror, CTLFLAG_RW, 0,
56 u_int g_mirror_debug = 0;
57 TUNABLE_INT("kern.geom.mirror.debug", &g_mirror_debug);
58 SYSCTL_UINT(_kern_geom_mirror, OID_AUTO, debug, CTLFLAG_RW, &g_mirror_debug, 0,
60 static u_int g_mirror_timeout = 4;
61 TUNABLE_INT("kern.geom.mirror.timeout", &g_mirror_timeout);
62 SYSCTL_UINT(_kern_geom_mirror, OID_AUTO, timeout, CTLFLAG_RW, &g_mirror_timeout,
63 0, "Time to wait on all mirror components");
64 static u_int g_mirror_idletime = 5;
65 TUNABLE_INT("kern.geom.mirror.idletime", &g_mirror_idletime);
66 SYSCTL_UINT(_kern_geom_mirror, OID_AUTO, idletime, CTLFLAG_RW,
67 &g_mirror_idletime, 0, "Mark components as clean when idling");
68 static u_int g_mirror_disconnect_on_failure = 1;
69 TUNABLE_INT("kern.geom.mirror.disconnect_on_failure",
70 &g_mirror_disconnect_on_failure);
71 SYSCTL_UINT(_kern_geom_mirror, OID_AUTO, disconnect_on_failure, CTLFLAG_RW,
72 &g_mirror_disconnect_on_failure, 0, "Disconnect component on I/O failure.");
73 static u_int g_mirror_syncreqs = 2;
74 TUNABLE_INT("kern.geom.mirror.sync_requests", &g_mirror_syncreqs);
75 SYSCTL_UINT(_kern_geom_mirror, OID_AUTO, sync_requests, CTLFLAG_RDTUN,
76 &g_mirror_syncreqs, 0, "Parallel synchronization I/O requests.");
78 #define MSLEEP(ident, mtx, priority, wmesg, timeout) do { \
79 G_MIRROR_DEBUG(4, "%s: Sleeping %p.", __func__, (ident)); \
80 msleep((ident), (mtx), (priority), (wmesg), (timeout)); \
81 G_MIRROR_DEBUG(4, "%s: Woken up %p.", __func__, (ident)); \
84 static eventhandler_tag g_mirror_post_sync = NULL;
85 static int g_mirror_shutdown = 0;
87 static int g_mirror_destroy_geom(struct gctl_req *req, struct g_class *mp,
89 static g_taste_t g_mirror_taste;
90 static void g_mirror_init(struct g_class *mp);
91 static void g_mirror_fini(struct g_class *mp);
93 struct g_class g_mirror_class = {
94 .name = G_MIRROR_CLASS_NAME,
96 .ctlreq = g_mirror_config,
97 .taste = g_mirror_taste,
98 .destroy_geom = g_mirror_destroy_geom,
99 .init = g_mirror_init,
100 .fini = g_mirror_fini
104 static void g_mirror_destroy_provider(struct g_mirror_softc *sc);
105 static int g_mirror_update_disk(struct g_mirror_disk *disk, u_int state);
106 static void g_mirror_update_device(struct g_mirror_softc *sc, boolean_t force);
107 static void g_mirror_dumpconf(struct sbuf *sb, const char *indent,
108 struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp);
109 static void g_mirror_sync_stop(struct g_mirror_disk *disk, int type);
110 static void g_mirror_register_request(struct bio *bp);
111 static void g_mirror_sync_release(struct g_mirror_softc *sc);
115 g_mirror_disk_state2str(int state)
119 case G_MIRROR_DISK_STATE_NONE:
121 case G_MIRROR_DISK_STATE_NEW:
123 case G_MIRROR_DISK_STATE_ACTIVE:
125 case G_MIRROR_DISK_STATE_STALE:
127 case G_MIRROR_DISK_STATE_SYNCHRONIZING:
128 return ("SYNCHRONIZING");
129 case G_MIRROR_DISK_STATE_DISCONNECTED:
130 return ("DISCONNECTED");
131 case G_MIRROR_DISK_STATE_DESTROY:
139 g_mirror_device_state2str(int state)
143 case G_MIRROR_DEVICE_STATE_STARTING:
145 case G_MIRROR_DEVICE_STATE_RUNNING:
153 g_mirror_get_diskname(struct g_mirror_disk *disk)
156 if (disk->d_consumer == NULL || disk->d_consumer->provider == NULL)
157 return ("[unknown]");
158 return (disk->d_name);
162 * --- Events handling functions ---
163 * Events in geom_mirror are used to maintain disks and device status
164 * from one thread to simplify locking.
167 g_mirror_event_free(struct g_mirror_event *ep)
174 g_mirror_event_send(void *arg, int state, int flags)
176 struct g_mirror_softc *sc;
177 struct g_mirror_disk *disk;
178 struct g_mirror_event *ep;
181 ep = malloc(sizeof(*ep), M_MIRROR, M_WAITOK);
182 G_MIRROR_DEBUG(4, "%s: Sending event %p.", __func__, ep);
183 if ((flags & G_MIRROR_EVENT_DEVICE) != 0) {
194 mtx_lock(&sc->sc_events_mtx);
195 TAILQ_INSERT_TAIL(&sc->sc_events, ep, e_next);
196 mtx_unlock(&sc->sc_events_mtx);
197 G_MIRROR_DEBUG(4, "%s: Waking up %p.", __func__, sc);
198 mtx_lock(&sc->sc_queue_mtx);
200 mtx_unlock(&sc->sc_queue_mtx);
201 if ((flags & G_MIRROR_EVENT_DONTWAIT) != 0)
203 sx_assert(&sc->sc_lock, SX_XLOCKED);
204 G_MIRROR_DEBUG(4, "%s: Sleeping %p.", __func__, ep);
205 sx_xunlock(&sc->sc_lock);
206 while ((ep->e_flags & G_MIRROR_EVENT_DONE) == 0) {
207 mtx_lock(&sc->sc_events_mtx);
208 MSLEEP(ep, &sc->sc_events_mtx, PRIBIO | PDROP, "m:event",
212 g_mirror_event_free(ep);
213 sx_xlock(&sc->sc_lock);
217 static struct g_mirror_event *
218 g_mirror_event_get(struct g_mirror_softc *sc)
220 struct g_mirror_event *ep;
222 mtx_lock(&sc->sc_events_mtx);
223 ep = TAILQ_FIRST(&sc->sc_events);
224 mtx_unlock(&sc->sc_events_mtx);
229 g_mirror_event_remove(struct g_mirror_softc *sc, struct g_mirror_event *ep)
232 mtx_lock(&sc->sc_events_mtx);
233 TAILQ_REMOVE(&sc->sc_events, ep, e_next);
234 mtx_unlock(&sc->sc_events_mtx);
238 g_mirror_event_cancel(struct g_mirror_disk *disk)
240 struct g_mirror_softc *sc;
241 struct g_mirror_event *ep, *tmpep;
244 sx_assert(&sc->sc_lock, SX_XLOCKED);
246 mtx_lock(&sc->sc_events_mtx);
247 TAILQ_FOREACH_SAFE(ep, &sc->sc_events, e_next, tmpep) {
248 if ((ep->e_flags & G_MIRROR_EVENT_DEVICE) != 0)
250 if (ep->e_disk != disk)
252 TAILQ_REMOVE(&sc->sc_events, ep, e_next);
253 if ((ep->e_flags & G_MIRROR_EVENT_DONTWAIT) != 0)
254 g_mirror_event_free(ep);
256 ep->e_error = ECANCELED;
260 mtx_unlock(&sc->sc_events_mtx);
264 * Return the number of disks in given state.
265 * If state is equal to -1, count all connected disks.
268 g_mirror_ndisks(struct g_mirror_softc *sc, int state)
270 struct g_mirror_disk *disk;
273 sx_assert(&sc->sc_lock, SX_LOCKED);
275 LIST_FOREACH(disk, &sc->sc_disks, d_next) {
276 if (state == -1 || disk->d_state == state)
283 * Find a disk in mirror by its disk ID.
285 static struct g_mirror_disk *
286 g_mirror_id2disk(struct g_mirror_softc *sc, uint32_t id)
288 struct g_mirror_disk *disk;
290 sx_assert(&sc->sc_lock, SX_XLOCKED);
292 LIST_FOREACH(disk, &sc->sc_disks, d_next) {
293 if (disk->d_id == id)
300 g_mirror_nrequests(struct g_mirror_softc *sc, struct g_consumer *cp)
305 mtx_lock(&sc->sc_queue_mtx);
306 TAILQ_FOREACH(bp, &sc->sc_queue.queue, bio_queue) {
307 if (bp->bio_from == cp)
310 mtx_unlock(&sc->sc_queue_mtx);
315 g_mirror_is_busy(struct g_mirror_softc *sc, struct g_consumer *cp)
320 "I/O requests for %s exist, can't destroy it now.",
324 if (g_mirror_nrequests(sc, cp) > 0) {
326 "I/O requests for %s in queue, can't destroy it now.",
334 g_mirror_destroy_consumer(void *arg, int flags __unused)
336 struct g_consumer *cp;
341 G_MIRROR_DEBUG(1, "Consumer %s destroyed.", cp->provider->name);
343 g_destroy_consumer(cp);
347 g_mirror_kill_consumer(struct g_mirror_softc *sc, struct g_consumer *cp)
349 struct g_provider *pp;
355 if (g_mirror_is_busy(sc, cp))
360 if ((pp->geom->flags & G_GEOM_WITHER) == 0)
363 G_MIRROR_DEBUG(2, "Access %s r%dw%de%d = %d", pp->name, -cp->acr,
364 -cp->acw, -cp->ace, 0);
365 if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0)
366 g_access(cp, -cp->acr, -cp->acw, -cp->ace);
369 * After retaste event was send (inside g_access()), we can send
370 * event to detach and destroy consumer.
371 * A class, which has consumer to the given provider connected
372 * will not receive retaste event for the provider.
373 * This is the way how I ignore retaste events when I close
374 * consumers opened for write: I detach and destroy consumer
375 * after retaste event is sent.
377 g_post_event(g_mirror_destroy_consumer, cp, M_WAITOK, NULL);
380 G_MIRROR_DEBUG(1, "Consumer %s destroyed.", pp->name);
382 g_destroy_consumer(cp);
386 g_mirror_connect_disk(struct g_mirror_disk *disk, struct g_provider *pp)
388 struct g_consumer *cp;
391 g_topology_assert_not();
392 KASSERT(disk->d_consumer == NULL,
393 ("Disk already connected (device %s).", disk->d_softc->sc_name));
396 cp = g_new_consumer(disk->d_softc->sc_geom);
397 error = g_attach(cp, pp);
399 g_destroy_consumer(cp);
403 error = g_access(cp, 1, 1, 1);
406 g_destroy_consumer(cp);
408 G_MIRROR_DEBUG(0, "Cannot open consumer %s (error=%d).",
413 disk->d_consumer = cp;
414 disk->d_consumer->private = disk;
415 disk->d_consumer->index = 0;
417 G_MIRROR_DEBUG(2, "Disk %s connected.", g_mirror_get_diskname(disk));
422 g_mirror_disconnect_consumer(struct g_mirror_softc *sc, struct g_consumer *cp)
429 if (cp->provider != NULL)
430 g_mirror_kill_consumer(sc, cp);
432 g_destroy_consumer(cp);
436 * Initialize disk. This means allocate memory, create consumer, attach it
437 * to the provider and open access (r1w1e1) to it.
439 static struct g_mirror_disk *
440 g_mirror_init_disk(struct g_mirror_softc *sc, struct g_provider *pp,
441 struct g_mirror_metadata *md, int *errorp)
443 struct g_mirror_disk *disk;
446 disk = malloc(sizeof(*disk), M_MIRROR, M_NOWAIT | M_ZERO);
452 error = g_mirror_connect_disk(disk, pp);
455 disk->d_id = md->md_did;
456 disk->d_state = G_MIRROR_DISK_STATE_NONE;
457 disk->d_priority = md->md_priority;
458 disk->d_flags = md->md_dflags;
459 error = g_getattr("GEOM::candelete", disk->d_consumer, &i);
460 if (error == 0 && i != 0)
461 disk->d_flags |= G_MIRROR_DISK_FLAG_CANDELETE;
462 if (md->md_provider[0] != '\0')
463 disk->d_flags |= G_MIRROR_DISK_FLAG_HARDCODED;
464 disk->d_sync.ds_consumer = NULL;
465 disk->d_sync.ds_offset = md->md_sync_offset;
466 disk->d_sync.ds_offset_done = md->md_sync_offset;
467 disk->d_genid = md->md_genid;
468 disk->d_sync.ds_syncid = md->md_syncid;
476 free(disk, M_MIRROR);
481 g_mirror_destroy_disk(struct g_mirror_disk *disk)
483 struct g_mirror_softc *sc;
485 g_topology_assert_not();
487 sx_assert(&sc->sc_lock, SX_XLOCKED);
489 LIST_REMOVE(disk, d_next);
490 g_mirror_event_cancel(disk);
491 if (sc->sc_hint == disk)
493 switch (disk->d_state) {
494 case G_MIRROR_DISK_STATE_SYNCHRONIZING:
495 g_mirror_sync_stop(disk, 1);
497 case G_MIRROR_DISK_STATE_NEW:
498 case G_MIRROR_DISK_STATE_STALE:
499 case G_MIRROR_DISK_STATE_ACTIVE:
501 g_mirror_disconnect_consumer(sc, disk->d_consumer);
503 free(disk, M_MIRROR);
506 KASSERT(0 == 1, ("Wrong disk state (%s, %s).",
507 g_mirror_get_diskname(disk),
508 g_mirror_disk_state2str(disk->d_state)));
513 g_mirror_destroy_device(struct g_mirror_softc *sc)
515 struct g_mirror_disk *disk;
516 struct g_mirror_event *ep;
518 struct g_consumer *cp, *tmpcp;
520 g_topology_assert_not();
521 sx_assert(&sc->sc_lock, SX_XLOCKED);
524 if (sc->sc_provider != NULL)
525 g_mirror_destroy_provider(sc);
526 for (disk = LIST_FIRST(&sc->sc_disks); disk != NULL;
527 disk = LIST_FIRST(&sc->sc_disks)) {
528 disk->d_flags &= ~G_MIRROR_DISK_FLAG_DIRTY;
529 g_mirror_update_metadata(disk);
530 g_mirror_destroy_disk(disk);
532 while ((ep = g_mirror_event_get(sc)) != NULL) {
533 g_mirror_event_remove(sc, ep);
534 if ((ep->e_flags & G_MIRROR_EVENT_DONTWAIT) != 0)
535 g_mirror_event_free(ep);
537 ep->e_error = ECANCELED;
538 ep->e_flags |= G_MIRROR_EVENT_DONE;
539 G_MIRROR_DEBUG(4, "%s: Waking up %p.", __func__, ep);
540 mtx_lock(&sc->sc_events_mtx);
542 mtx_unlock(&sc->sc_events_mtx);
545 callout_drain(&sc->sc_callout);
548 LIST_FOREACH_SAFE(cp, &sc->sc_sync.ds_geom->consumer, consumer, tmpcp) {
549 g_mirror_disconnect_consumer(sc, cp);
551 g_wither_geom(sc->sc_sync.ds_geom, ENXIO);
552 G_MIRROR_DEBUG(0, "Device %s destroyed.", gp->name);
553 g_wither_geom(gp, ENXIO);
555 mtx_destroy(&sc->sc_queue_mtx);
556 mtx_destroy(&sc->sc_events_mtx);
557 sx_xunlock(&sc->sc_lock);
558 sx_destroy(&sc->sc_lock);
562 g_mirror_orphan(struct g_consumer *cp)
564 struct g_mirror_disk *disk;
571 disk->d_softc->sc_bump_id |= G_MIRROR_BUMP_SYNCID;
572 g_mirror_event_send(disk, G_MIRROR_DISK_STATE_DISCONNECTED,
573 G_MIRROR_EVENT_DONTWAIT);
577 * Function should return the next active disk on the list.
578 * It is possible that it will be the same disk as given.
579 * If there are no active disks on list, NULL is returned.
581 static __inline struct g_mirror_disk *
582 g_mirror_find_next(struct g_mirror_softc *sc, struct g_mirror_disk *disk)
584 struct g_mirror_disk *dp;
586 for (dp = LIST_NEXT(disk, d_next); dp != disk;
587 dp = LIST_NEXT(dp, d_next)) {
589 dp = LIST_FIRST(&sc->sc_disks);
590 if (dp->d_state == G_MIRROR_DISK_STATE_ACTIVE)
593 if (dp->d_state != G_MIRROR_DISK_STATE_ACTIVE)
598 static struct g_mirror_disk *
599 g_mirror_get_disk(struct g_mirror_softc *sc)
601 struct g_mirror_disk *disk;
603 if (sc->sc_hint == NULL) {
604 sc->sc_hint = LIST_FIRST(&sc->sc_disks);
605 if (sc->sc_hint == NULL)
609 if (disk->d_state != G_MIRROR_DISK_STATE_ACTIVE) {
610 disk = g_mirror_find_next(sc, disk);
614 sc->sc_hint = g_mirror_find_next(sc, disk);
619 g_mirror_write_metadata(struct g_mirror_disk *disk,
620 struct g_mirror_metadata *md)
622 struct g_mirror_softc *sc;
623 struct g_consumer *cp;
624 off_t offset, length;
628 g_topology_assert_not();
630 sx_assert(&sc->sc_lock, SX_LOCKED);
632 cp = disk->d_consumer;
633 KASSERT(cp != NULL, ("NULL consumer (%s).", sc->sc_name));
634 KASSERT(cp->provider != NULL, ("NULL provider (%s).", sc->sc_name));
635 KASSERT(cp->acr >= 1 && cp->acw >= 1 && cp->ace >= 1,
636 ("Consumer %s closed? (r%dw%de%d).", cp->provider->name, cp->acr,
638 length = cp->provider->sectorsize;
639 offset = cp->provider->mediasize - length;
640 sector = malloc((size_t)length, M_MIRROR, M_WAITOK | M_ZERO);
642 mirror_metadata_encode(md, sector);
643 error = g_write_data(cp, offset, sector, length);
644 free(sector, M_MIRROR);
646 if ((disk->d_flags & G_MIRROR_DISK_FLAG_BROKEN) == 0) {
647 disk->d_flags |= G_MIRROR_DISK_FLAG_BROKEN;
648 G_MIRROR_DEBUG(0, "Cannot write metadata on %s "
649 "(device=%s, error=%d).",
650 g_mirror_get_diskname(disk), sc->sc_name, error);
652 G_MIRROR_DEBUG(1, "Cannot write metadata on %s "
653 "(device=%s, error=%d).",
654 g_mirror_get_diskname(disk), sc->sc_name, error);
656 if (g_mirror_disconnect_on_failure &&
657 g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_ACTIVE) > 1) {
658 sc->sc_bump_id |= G_MIRROR_BUMP_GENID;
659 g_mirror_event_send(disk,
660 G_MIRROR_DISK_STATE_DISCONNECTED,
661 G_MIRROR_EVENT_DONTWAIT);
668 g_mirror_clear_metadata(struct g_mirror_disk *disk)
672 g_topology_assert_not();
673 sx_assert(&disk->d_softc->sc_lock, SX_LOCKED);
675 error = g_mirror_write_metadata(disk, NULL);
677 G_MIRROR_DEBUG(2, "Metadata on %s cleared.",
678 g_mirror_get_diskname(disk));
681 "Cannot clear metadata on disk %s (error=%d).",
682 g_mirror_get_diskname(disk), error);
688 g_mirror_fill_metadata(struct g_mirror_softc *sc, struct g_mirror_disk *disk,
689 struct g_mirror_metadata *md)
692 strlcpy(md->md_magic, G_MIRROR_MAGIC, sizeof(md->md_magic));
693 md->md_version = G_MIRROR_VERSION;
694 strlcpy(md->md_name, sc->sc_name, sizeof(md->md_name));
695 md->md_mid = sc->sc_id;
696 md->md_all = sc->sc_ndisks;
697 md->md_slice = sc->sc_slice;
698 md->md_balance = sc->sc_balance;
699 md->md_genid = sc->sc_genid;
700 md->md_mediasize = sc->sc_mediasize;
701 md->md_sectorsize = sc->sc_sectorsize;
702 md->md_mflags = (sc->sc_flags & G_MIRROR_DEVICE_FLAG_MASK);
703 bzero(md->md_provider, sizeof(md->md_provider));
705 md->md_did = arc4random();
709 md->md_sync_offset = 0;
712 md->md_did = disk->d_id;
713 md->md_priority = disk->d_priority;
714 md->md_syncid = disk->d_sync.ds_syncid;
715 md->md_dflags = (disk->d_flags & G_MIRROR_DISK_FLAG_MASK);
716 if (disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING)
717 md->md_sync_offset = disk->d_sync.ds_offset_done;
719 md->md_sync_offset = 0;
720 if ((disk->d_flags & G_MIRROR_DISK_FLAG_HARDCODED) != 0) {
721 strlcpy(md->md_provider,
722 disk->d_consumer->provider->name,
723 sizeof(md->md_provider));
725 md->md_provsize = disk->d_consumer->provider->mediasize;
730 g_mirror_update_metadata(struct g_mirror_disk *disk)
732 struct g_mirror_softc *sc;
733 struct g_mirror_metadata md;
736 g_topology_assert_not();
738 sx_assert(&sc->sc_lock, SX_LOCKED);
740 g_mirror_fill_metadata(sc, disk, &md);
741 error = g_mirror_write_metadata(disk, &md);
743 G_MIRROR_DEBUG(2, "Metadata on %s updated.",
744 g_mirror_get_diskname(disk));
747 "Cannot update metadata on disk %s (error=%d).",
748 g_mirror_get_diskname(disk), error);
753 g_mirror_bump_syncid(struct g_mirror_softc *sc)
755 struct g_mirror_disk *disk;
757 g_topology_assert_not();
758 sx_assert(&sc->sc_lock, SX_XLOCKED);
759 KASSERT(g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_ACTIVE) > 0,
760 ("%s called with no active disks (device=%s).", __func__,
764 G_MIRROR_DEBUG(1, "Device %s: syncid bumped to %u.", sc->sc_name,
766 LIST_FOREACH(disk, &sc->sc_disks, d_next) {
767 if (disk->d_state == G_MIRROR_DISK_STATE_ACTIVE ||
768 disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING) {
769 disk->d_sync.ds_syncid = sc->sc_syncid;
770 g_mirror_update_metadata(disk);
776 g_mirror_bump_genid(struct g_mirror_softc *sc)
778 struct g_mirror_disk *disk;
780 g_topology_assert_not();
781 sx_assert(&sc->sc_lock, SX_XLOCKED);
782 KASSERT(g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_ACTIVE) > 0,
783 ("%s called with no active disks (device=%s).", __func__,
787 G_MIRROR_DEBUG(1, "Device %s: genid bumped to %u.", sc->sc_name,
789 LIST_FOREACH(disk, &sc->sc_disks, d_next) {
790 if (disk->d_state == G_MIRROR_DISK_STATE_ACTIVE ||
791 disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING) {
792 disk->d_genid = sc->sc_genid;
793 g_mirror_update_metadata(disk);
799 g_mirror_idle(struct g_mirror_softc *sc, int acw)
801 struct g_mirror_disk *disk;
804 g_topology_assert_not();
805 sx_assert(&sc->sc_lock, SX_XLOCKED);
807 if (sc->sc_provider == NULL)
809 if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_NOFAILSYNC) != 0)
813 if (sc->sc_writes > 0)
815 if (acw > 0 || (acw == -1 && sc->sc_provider->acw > 0)) {
816 timeout = g_mirror_idletime - (time_uptime - sc->sc_last_write);
817 if (!g_mirror_shutdown && timeout > 0)
821 LIST_FOREACH(disk, &sc->sc_disks, d_next) {
822 if (disk->d_state != G_MIRROR_DISK_STATE_ACTIVE)
824 G_MIRROR_DEBUG(1, "Disk %s (device %s) marked as clean.",
825 g_mirror_get_diskname(disk), sc->sc_name);
826 disk->d_flags &= ~G_MIRROR_DISK_FLAG_DIRTY;
827 g_mirror_update_metadata(disk);
833 g_mirror_unidle(struct g_mirror_softc *sc)
835 struct g_mirror_disk *disk;
837 g_topology_assert_not();
838 sx_assert(&sc->sc_lock, SX_XLOCKED);
840 if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_NOFAILSYNC) != 0)
843 sc->sc_last_write = time_uptime;
844 LIST_FOREACH(disk, &sc->sc_disks, d_next) {
845 if (disk->d_state != G_MIRROR_DISK_STATE_ACTIVE)
847 G_MIRROR_DEBUG(1, "Disk %s (device %s) marked as dirty.",
848 g_mirror_get_diskname(disk), sc->sc_name);
849 disk->d_flags |= G_MIRROR_DISK_FLAG_DIRTY;
850 g_mirror_update_metadata(disk);
855 g_mirror_done(struct bio *bp)
857 struct g_mirror_softc *sc;
859 sc = bp->bio_from->geom->softc;
860 bp->bio_cflags = G_MIRROR_BIO_FLAG_REGULAR;
861 mtx_lock(&sc->sc_queue_mtx);
862 bioq_disksort(&sc->sc_queue, bp);
863 mtx_unlock(&sc->sc_queue_mtx);
868 g_mirror_regular_request(struct bio *bp)
870 struct g_mirror_softc *sc;
871 struct g_mirror_disk *disk;
874 g_topology_assert_not();
876 pbp = bp->bio_parent;
877 sc = pbp->bio_to->geom->softc;
878 bp->bio_from->index--;
879 if (bp->bio_cmd == BIO_WRITE)
881 disk = bp->bio_from->private;
884 g_mirror_kill_consumer(sc, bp->bio_from);
889 KASSERT(pbp->bio_inbed <= pbp->bio_children,
890 ("bio_inbed (%u) is bigger than bio_children (%u).", pbp->bio_inbed,
892 if (bp->bio_error == 0 && pbp->bio_error == 0) {
893 G_MIRROR_LOGREQ(3, bp, "Request delivered.");
895 if (pbp->bio_children == pbp->bio_inbed) {
896 G_MIRROR_LOGREQ(3, pbp, "Request delivered.");
897 pbp->bio_completed = pbp->bio_length;
898 if (pbp->bio_cmd == BIO_WRITE ||
899 pbp->bio_cmd == BIO_DELETE) {
900 bioq_remove(&sc->sc_inflight, pbp);
901 /* Release delayed sync requests if possible. */
902 g_mirror_sync_release(sc);
904 g_io_deliver(pbp, pbp->bio_error);
907 } else if (bp->bio_error != 0) {
908 if (pbp->bio_error == 0)
909 pbp->bio_error = bp->bio_error;
911 if ((disk->d_flags & G_MIRROR_DISK_FLAG_BROKEN) == 0) {
912 disk->d_flags |= G_MIRROR_DISK_FLAG_BROKEN;
913 G_MIRROR_LOGREQ(0, bp,
914 "Request failed (error=%d).",
917 G_MIRROR_LOGREQ(1, bp,
918 "Request failed (error=%d).",
921 if (g_mirror_disconnect_on_failure &&
922 g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_ACTIVE) > 1)
924 sc->sc_bump_id |= G_MIRROR_BUMP_GENID;
925 g_mirror_event_send(disk,
926 G_MIRROR_DISK_STATE_DISCONNECTED,
927 G_MIRROR_EVENT_DONTWAIT);
930 switch (pbp->bio_cmd) {
940 switch (pbp->bio_cmd) {
942 if (pbp->bio_inbed < pbp->bio_children)
944 if (g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_ACTIVE) == 1)
945 g_io_deliver(pbp, pbp->bio_error);
948 mtx_lock(&sc->sc_queue_mtx);
949 bioq_disksort(&sc->sc_queue, pbp);
950 mtx_unlock(&sc->sc_queue_mtx);
951 G_MIRROR_DEBUG(4, "%s: Waking up %p.", __func__, sc);
957 if (pbp->bio_children == 0) {
959 * All requests failed.
961 } else if (pbp->bio_inbed < pbp->bio_children) {
964 } else if (pbp->bio_children == pbp->bio_inbed) {
965 /* Some requests succeeded. */
967 pbp->bio_completed = pbp->bio_length;
969 bioq_remove(&sc->sc_inflight, pbp);
970 /* Release delayed sync requests if possible. */
971 g_mirror_sync_release(sc);
972 g_io_deliver(pbp, pbp->bio_error);
975 KASSERT(1 == 0, ("Invalid request: %u.", pbp->bio_cmd));
981 g_mirror_sync_done(struct bio *bp)
983 struct g_mirror_softc *sc;
985 G_MIRROR_LOGREQ(3, bp, "Synchronization request delivered.");
986 sc = bp->bio_from->geom->softc;
987 bp->bio_cflags = G_MIRROR_BIO_FLAG_SYNC;
988 mtx_lock(&sc->sc_queue_mtx);
989 bioq_disksort(&sc->sc_queue, bp);
990 mtx_unlock(&sc->sc_queue_mtx);
995 g_mirror_kernel_dump(struct bio *bp)
997 struct g_mirror_softc *sc;
998 struct g_mirror_disk *disk;
1000 struct g_kerneldump *gkd;
1003 * We configure dumping to the first component, because this component
1004 * will be used for reading with 'prefer' balance algorithm.
1005 * If the component with the higest priority is currently disconnected
1006 * we will not be able to read the dump after the reboot if it will be
1007 * connected and synchronized later. Can we do something better?
1009 sc = bp->bio_to->geom->softc;
1010 disk = LIST_FIRST(&sc->sc_disks);
1012 gkd = (struct g_kerneldump *)bp->bio_data;
1013 if (gkd->length > bp->bio_to->mediasize)
1014 gkd->length = bp->bio_to->mediasize;
1015 cbp = g_clone_bio(bp);
1017 g_io_deliver(bp, ENOMEM);
1020 cbp->bio_done = g_std_done;
1021 g_io_request(cbp, disk->d_consumer);
1022 G_MIRROR_DEBUG(1, "Kernel dump will go to %s.",
1023 g_mirror_get_diskname(disk));
1027 g_mirror_flush(struct g_mirror_softc *sc, struct bio *bp)
1029 struct bio_queue_head queue;
1030 struct g_mirror_disk *disk;
1031 struct g_consumer *cp;
1035 LIST_FOREACH(disk, &sc->sc_disks, d_next) {
1036 if (disk->d_state != G_MIRROR_DISK_STATE_ACTIVE)
1038 cbp = g_clone_bio(bp);
1040 for (cbp = bioq_first(&queue); cbp != NULL;
1041 cbp = bioq_first(&queue)) {
1042 bioq_remove(&queue, cbp);
1045 if (bp->bio_error == 0)
1046 bp->bio_error = ENOMEM;
1047 g_io_deliver(bp, bp->bio_error);
1050 bioq_insert_tail(&queue, cbp);
1051 cbp->bio_done = g_std_done;
1052 cbp->bio_caller1 = disk;
1053 cbp->bio_to = disk->d_consumer->provider;
1055 for (cbp = bioq_first(&queue); cbp != NULL; cbp = bioq_first(&queue)) {
1056 bioq_remove(&queue, cbp);
1057 G_MIRROR_LOGREQ(3, cbp, "Sending request.");
1058 disk = cbp->bio_caller1;
1059 cbp->bio_caller1 = NULL;
1060 cp = disk->d_consumer;
1061 KASSERT(cp->acr >= 1 && cp->acw >= 1 && cp->ace >= 1,
1062 ("Consumer %s not opened (r%dw%de%d).", cp->provider->name,
1063 cp->acr, cp->acw, cp->ace));
1064 g_io_request(cbp, disk->d_consumer);
1069 g_mirror_start(struct bio *bp)
1071 struct g_mirror_softc *sc;
1073 sc = bp->bio_to->geom->softc;
1075 * If sc == NULL or there are no valid disks, provider's error
1076 * should be set and g_mirror_start() should not be called at all.
1078 KASSERT(sc != NULL && sc->sc_state == G_MIRROR_DEVICE_STATE_RUNNING,
1079 ("Provider's error should be set (error=%d)(mirror=%s).",
1080 bp->bio_to->error, bp->bio_to->name));
1081 G_MIRROR_LOGREQ(3, bp, "Request received.");
1083 switch (bp->bio_cmd) {
1089 g_mirror_flush(sc, bp);
1092 if (g_handleattr_int(bp, "GEOM::candelete", 1))
1094 else if (strcmp("GEOM::kerneldump", bp->bio_attribute) == 0) {
1095 g_mirror_kernel_dump(bp);
1100 g_io_deliver(bp, EOPNOTSUPP);
1103 mtx_lock(&sc->sc_queue_mtx);
1104 bioq_disksort(&sc->sc_queue, bp);
1105 mtx_unlock(&sc->sc_queue_mtx);
1106 G_MIRROR_DEBUG(4, "%s: Waking up %p.", __func__, sc);
1111 * Return TRUE if the given request is colliding with a in-progress
1112 * synchronization request.
1115 g_mirror_sync_collision(struct g_mirror_softc *sc, struct bio *bp)
1117 struct g_mirror_disk *disk;
1119 off_t rstart, rend, sstart, send;
1122 if (sc->sc_sync.ds_ndisks == 0)
1124 rstart = bp->bio_offset;
1125 rend = bp->bio_offset + bp->bio_length;
1126 LIST_FOREACH(disk, &sc->sc_disks, d_next) {
1127 if (disk->d_state != G_MIRROR_DISK_STATE_SYNCHRONIZING)
1129 for (i = 0; i < g_mirror_syncreqs; i++) {
1130 sbp = disk->d_sync.ds_bios[i];
1133 sstart = sbp->bio_offset;
1134 send = sbp->bio_offset + sbp->bio_length;
1135 if (rend > sstart && rstart < send)
1143 * Return TRUE if the given sync request is colliding with a in-progress regular
1147 g_mirror_regular_collision(struct g_mirror_softc *sc, struct bio *sbp)
1149 off_t rstart, rend, sstart, send;
1152 if (sc->sc_sync.ds_ndisks == 0)
1154 sstart = sbp->bio_offset;
1155 send = sbp->bio_offset + sbp->bio_length;
1156 TAILQ_FOREACH(bp, &sc->sc_inflight.queue, bio_queue) {
1157 rstart = bp->bio_offset;
1158 rend = bp->bio_offset + bp->bio_length;
1159 if (rend > sstart && rstart < send)
1166 * Puts request onto delayed queue.
1169 g_mirror_regular_delay(struct g_mirror_softc *sc, struct bio *bp)
1172 G_MIRROR_LOGREQ(2, bp, "Delaying request.");
1173 bioq_insert_head(&sc->sc_regular_delayed, bp);
1177 * Puts synchronization request onto delayed queue.
1180 g_mirror_sync_delay(struct g_mirror_softc *sc, struct bio *bp)
1183 G_MIRROR_LOGREQ(2, bp, "Delaying synchronization request.");
1184 bioq_insert_tail(&sc->sc_sync_delayed, bp);
1188 * Releases delayed regular requests which don't collide anymore with sync
1192 g_mirror_regular_release(struct g_mirror_softc *sc)
1194 struct bio *bp, *bp2;
1196 TAILQ_FOREACH_SAFE(bp, &sc->sc_regular_delayed.queue, bio_queue, bp2) {
1197 if (g_mirror_sync_collision(sc, bp))
1199 bioq_remove(&sc->sc_regular_delayed, bp);
1200 G_MIRROR_LOGREQ(2, bp, "Releasing delayed request (%p).", bp);
1201 mtx_lock(&sc->sc_queue_mtx);
1202 bioq_insert_head(&sc->sc_queue, bp);
1205 * wakeup() is not needed, because this function is called from
1206 * the worker thread.
1208 wakeup(&sc->sc_queue);
1210 mtx_unlock(&sc->sc_queue_mtx);
1215 * Releases delayed sync requests which don't collide anymore with regular
1219 g_mirror_sync_release(struct g_mirror_softc *sc)
1221 struct bio *bp, *bp2;
1223 TAILQ_FOREACH_SAFE(bp, &sc->sc_sync_delayed.queue, bio_queue, bp2) {
1224 if (g_mirror_regular_collision(sc, bp))
1226 bioq_remove(&sc->sc_sync_delayed, bp);
1227 G_MIRROR_LOGREQ(2, bp,
1228 "Releasing delayed synchronization request.");
1229 g_io_request(bp, bp->bio_from);
1234 * Handle synchronization requests.
1235 * Every synchronization request is two-steps process: first, READ request is
1236 * send to active provider and then WRITE request (with read data) to the provider
1237 * beeing synchronized. When WRITE is finished, new synchronization request is
1241 g_mirror_sync_request(struct bio *bp)
1243 struct g_mirror_softc *sc;
1244 struct g_mirror_disk *disk;
1246 bp->bio_from->index--;
1247 sc = bp->bio_from->geom->softc;
1248 disk = bp->bio_from->private;
1250 sx_xunlock(&sc->sc_lock); /* Avoid recursion on sc_lock. */
1252 g_mirror_kill_consumer(sc, bp->bio_from);
1253 g_topology_unlock();
1254 free(bp->bio_data, M_MIRROR);
1256 sx_xlock(&sc->sc_lock);
1261 * Synchronization request.
1263 switch (bp->bio_cmd) {
1266 struct g_consumer *cp;
1268 if (bp->bio_error != 0) {
1269 G_MIRROR_LOGREQ(0, bp,
1270 "Synchronization request failed (error=%d).",
1275 G_MIRROR_LOGREQ(3, bp,
1276 "Synchronization request half-finished.");
1277 bp->bio_cmd = BIO_WRITE;
1279 cp = disk->d_consumer;
1280 KASSERT(cp->acr >= 1 && cp->acw >= 1 && cp->ace >= 1,
1281 ("Consumer %s not opened (r%dw%de%d).", cp->provider->name,
1282 cp->acr, cp->acw, cp->ace));
1284 g_io_request(bp, cp);
1289 struct g_mirror_disk_sync *sync;
1294 if (bp->bio_error != 0) {
1295 G_MIRROR_LOGREQ(0, bp,
1296 "Synchronization request failed (error=%d).",
1299 sc->sc_bump_id |= G_MIRROR_BUMP_GENID;
1300 g_mirror_event_send(disk,
1301 G_MIRROR_DISK_STATE_DISCONNECTED,
1302 G_MIRROR_EVENT_DONTWAIT);
1305 G_MIRROR_LOGREQ(3, bp, "Synchronization request finished.");
1306 sync = &disk->d_sync;
1307 if (sync->ds_offset == sc->sc_mediasize ||
1308 sync->ds_consumer == NULL ||
1309 (sc->sc_flags & G_MIRROR_DEVICE_FLAG_DESTROY) != 0) {
1310 /* Don't send more synchronization requests. */
1311 sync->ds_inflight--;
1312 if (sync->ds_bios != NULL) {
1313 i = (int)(uintptr_t)bp->bio_caller1;
1314 sync->ds_bios[i] = NULL;
1316 free(bp->bio_data, M_MIRROR);
1318 if (sync->ds_inflight > 0)
1320 if (sync->ds_consumer == NULL ||
1321 (sc->sc_flags & G_MIRROR_DEVICE_FLAG_DESTROY) != 0) {
1324 /* Disk up-to-date, activate it. */
1325 g_mirror_event_send(disk, G_MIRROR_DISK_STATE_ACTIVE,
1326 G_MIRROR_EVENT_DONTWAIT);
1330 /* Send next synchronization request. */
1331 data = bp->bio_data;
1332 bzero(bp, sizeof(*bp));
1333 bp->bio_cmd = BIO_READ;
1334 bp->bio_offset = sync->ds_offset;
1335 bp->bio_length = MIN(MAXPHYS, sc->sc_mediasize - bp->bio_offset);
1336 sync->ds_offset += bp->bio_length;
1337 bp->bio_done = g_mirror_sync_done;
1338 bp->bio_data = data;
1339 bp->bio_from = sync->ds_consumer;
1340 bp->bio_to = sc->sc_provider;
1341 G_MIRROR_LOGREQ(3, bp, "Sending synchronization request.");
1342 sync->ds_consumer->index++;
1344 * Delay the request if it is colliding with a regular request.
1346 if (g_mirror_regular_collision(sc, bp))
1347 g_mirror_sync_delay(sc, bp);
1349 g_io_request(bp, sync->ds_consumer);
1351 /* Release delayed requests if possible. */
1352 g_mirror_regular_release(sc);
1354 /* Find the smallest offset */
1355 offset = sc->sc_mediasize;
1356 for (i = 0; i < g_mirror_syncreqs; i++) {
1357 bp = sync->ds_bios[i];
1358 if (bp->bio_offset < offset)
1359 offset = bp->bio_offset;
1361 if (sync->ds_offset_done + (MAXPHYS * 100) < offset) {
1362 /* Update offset_done on every 100 blocks. */
1363 sync->ds_offset_done = offset;
1364 g_mirror_update_metadata(disk);
1369 KASSERT(1 == 0, ("Invalid command here: %u (device=%s)",
1370 bp->bio_cmd, sc->sc_name));
1376 g_mirror_request_prefer(struct g_mirror_softc *sc, struct bio *bp)
1378 struct g_mirror_disk *disk;
1379 struct g_consumer *cp;
1382 LIST_FOREACH(disk, &sc->sc_disks, d_next) {
1383 if (disk->d_state == G_MIRROR_DISK_STATE_ACTIVE)
1387 if (bp->bio_error == 0)
1388 bp->bio_error = ENXIO;
1389 g_io_deliver(bp, bp->bio_error);
1392 cbp = g_clone_bio(bp);
1394 if (bp->bio_error == 0)
1395 bp->bio_error = ENOMEM;
1396 g_io_deliver(bp, bp->bio_error);
1400 * Fill in the component buf structure.
1402 cp = disk->d_consumer;
1403 cbp->bio_done = g_mirror_done;
1404 cbp->bio_to = cp->provider;
1405 G_MIRROR_LOGREQ(3, cbp, "Sending request.");
1406 KASSERT(cp->acr >= 1 && cp->acw >= 1 && cp->ace >= 1,
1407 ("Consumer %s not opened (r%dw%de%d).", cp->provider->name, cp->acr,
1410 g_io_request(cbp, cp);
1414 g_mirror_request_round_robin(struct g_mirror_softc *sc, struct bio *bp)
1416 struct g_mirror_disk *disk;
1417 struct g_consumer *cp;
1420 disk = g_mirror_get_disk(sc);
1422 if (bp->bio_error == 0)
1423 bp->bio_error = ENXIO;
1424 g_io_deliver(bp, bp->bio_error);
1427 cbp = g_clone_bio(bp);
1429 if (bp->bio_error == 0)
1430 bp->bio_error = ENOMEM;
1431 g_io_deliver(bp, bp->bio_error);
1435 * Fill in the component buf structure.
1437 cp = disk->d_consumer;
1438 cbp->bio_done = g_mirror_done;
1439 cbp->bio_to = cp->provider;
1440 G_MIRROR_LOGREQ(3, cbp, "Sending request.");
1441 KASSERT(cp->acr >= 1 && cp->acw >= 1 && cp->ace >= 1,
1442 ("Consumer %s not opened (r%dw%de%d).", cp->provider->name, cp->acr,
1445 g_io_request(cbp, cp);
1448 #define TRACK_SIZE (1 * 1024 * 1024)
1449 #define LOAD_SCALE 256
1450 #define ABS(x) (((x) >= 0) ? (x) : (-(x)))
1453 g_mirror_request_load(struct g_mirror_softc *sc, struct bio *bp)
1455 struct g_mirror_disk *disk, *dp;
1456 struct g_consumer *cp;
1460 /* Find a disk with the smallest load. */
1463 LIST_FOREACH(dp, &sc->sc_disks, d_next) {
1464 if (dp->d_state != G_MIRROR_DISK_STATE_ACTIVE)
1467 /* If disk head is precisely in position - highly prefer it. */
1468 if (dp->d_last_offset == bp->bio_offset)
1469 prio -= 2 * LOAD_SCALE;
1471 /* If disk head is close to position - prefer it. */
1472 if (ABS(dp->d_last_offset - bp->bio_offset) < TRACK_SIZE)
1473 prio -= 1 * LOAD_SCALE;
1479 KASSERT(disk != NULL, ("NULL disk for %s.", sc->sc_name));
1480 cbp = g_clone_bio(bp);
1482 if (bp->bio_error == 0)
1483 bp->bio_error = ENOMEM;
1484 g_io_deliver(bp, bp->bio_error);
1488 * Fill in the component buf structure.
1490 cp = disk->d_consumer;
1491 cbp->bio_done = g_mirror_done;
1492 cbp->bio_to = cp->provider;
1493 G_MIRROR_LOGREQ(3, cbp, "Sending request.");
1494 KASSERT(cp->acr >= 1 && cp->acw >= 1 && cp->ace >= 1,
1495 ("Consumer %s not opened (r%dw%de%d).", cp->provider->name, cp->acr,
1498 /* Remember last head position */
1499 disk->d_last_offset = bp->bio_offset + bp->bio_length;
1501 LIST_FOREACH(dp, &sc->sc_disks, d_next) {
1502 dp->load = (dp->d_consumer->index * LOAD_SCALE +
1505 g_io_request(cbp, cp);
1509 g_mirror_request_split(struct g_mirror_softc *sc, struct bio *bp)
1511 struct bio_queue_head queue;
1512 struct g_mirror_disk *disk;
1513 struct g_consumer *cp;
1515 off_t left, mod, offset, slice;
1519 if (bp->bio_length <= sc->sc_slice) {
1520 g_mirror_request_round_robin(sc, bp);
1523 ndisks = g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_ACTIVE);
1524 slice = bp->bio_length / ndisks;
1525 mod = slice % sc->sc_provider->sectorsize;
1527 slice += sc->sc_provider->sectorsize - mod;
1529 * Allocate all bios before sending any request, so we can
1530 * return ENOMEM in nice and clean way.
1532 left = bp->bio_length;
1533 offset = bp->bio_offset;
1534 data = bp->bio_data;
1536 LIST_FOREACH(disk, &sc->sc_disks, d_next) {
1537 if (disk->d_state != G_MIRROR_DISK_STATE_ACTIVE)
1539 cbp = g_clone_bio(bp);
1541 for (cbp = bioq_first(&queue); cbp != NULL;
1542 cbp = bioq_first(&queue)) {
1543 bioq_remove(&queue, cbp);
1546 if (bp->bio_error == 0)
1547 bp->bio_error = ENOMEM;
1548 g_io_deliver(bp, bp->bio_error);
1551 bioq_insert_tail(&queue, cbp);
1552 cbp->bio_done = g_mirror_done;
1553 cbp->bio_caller1 = disk;
1554 cbp->bio_to = disk->d_consumer->provider;
1555 cbp->bio_offset = offset;
1556 cbp->bio_data = data;
1557 cbp->bio_length = MIN(left, slice);
1558 left -= cbp->bio_length;
1561 offset += cbp->bio_length;
1562 data += cbp->bio_length;
1564 for (cbp = bioq_first(&queue); cbp != NULL; cbp = bioq_first(&queue)) {
1565 bioq_remove(&queue, cbp);
1566 G_MIRROR_LOGREQ(3, cbp, "Sending request.");
1567 disk = cbp->bio_caller1;
1568 cbp->bio_caller1 = NULL;
1569 cp = disk->d_consumer;
1570 KASSERT(cp->acr >= 1 && cp->acw >= 1 && cp->ace >= 1,
1571 ("Consumer %s not opened (r%dw%de%d).", cp->provider->name,
1572 cp->acr, cp->acw, cp->ace));
1573 disk->d_consumer->index++;
1574 g_io_request(cbp, disk->d_consumer);
1579 g_mirror_register_request(struct bio *bp)
1581 struct g_mirror_softc *sc;
1583 sc = bp->bio_to->geom->softc;
1584 switch (bp->bio_cmd) {
1586 switch (sc->sc_balance) {
1587 case G_MIRROR_BALANCE_LOAD:
1588 g_mirror_request_load(sc, bp);
1590 case G_MIRROR_BALANCE_PREFER:
1591 g_mirror_request_prefer(sc, bp);
1593 case G_MIRROR_BALANCE_ROUND_ROBIN:
1594 g_mirror_request_round_robin(sc, bp);
1596 case G_MIRROR_BALANCE_SPLIT:
1597 g_mirror_request_split(sc, bp);
1604 struct g_mirror_disk *disk;
1605 struct g_mirror_disk_sync *sync;
1606 struct bio_queue_head queue;
1607 struct g_consumer *cp;
1611 * Delay the request if it is colliding with a synchronization
1614 if (g_mirror_sync_collision(sc, bp)) {
1615 g_mirror_regular_delay(sc, bp);
1620 g_mirror_unidle(sc);
1622 sc->sc_last_write = time_uptime;
1625 * Allocate all bios before sending any request, so we can
1626 * return ENOMEM in nice and clean way.
1629 LIST_FOREACH(disk, &sc->sc_disks, d_next) {
1630 sync = &disk->d_sync;
1631 switch (disk->d_state) {
1632 case G_MIRROR_DISK_STATE_ACTIVE:
1634 case G_MIRROR_DISK_STATE_SYNCHRONIZING:
1635 if (bp->bio_offset >= sync->ds_offset)
1641 if (bp->bio_cmd == BIO_DELETE &&
1642 (disk->d_flags & G_MIRROR_DISK_FLAG_CANDELETE) == 0)
1644 cbp = g_clone_bio(bp);
1646 for (cbp = bioq_first(&queue); cbp != NULL;
1647 cbp = bioq_first(&queue)) {
1648 bioq_remove(&queue, cbp);
1651 if (bp->bio_error == 0)
1652 bp->bio_error = ENOMEM;
1653 g_io_deliver(bp, bp->bio_error);
1656 bioq_insert_tail(&queue, cbp);
1657 cbp->bio_done = g_mirror_done;
1658 cp = disk->d_consumer;
1659 cbp->bio_caller1 = cp;
1660 cbp->bio_to = cp->provider;
1661 KASSERT(cp->acr >= 1 && cp->acw >= 1 && cp->ace >= 1,
1662 ("Consumer %s not opened (r%dw%de%d).",
1663 cp->provider->name, cp->acr, cp->acw, cp->ace));
1665 for (cbp = bioq_first(&queue); cbp != NULL;
1666 cbp = bioq_first(&queue)) {
1667 bioq_remove(&queue, cbp);
1668 G_MIRROR_LOGREQ(3, cbp, "Sending request.");
1669 cp = cbp->bio_caller1;
1670 cbp->bio_caller1 = NULL;
1673 g_io_request(cbp, cp);
1676 * Put request onto inflight queue, so we can check if new
1677 * synchronization requests don't collide with it.
1679 bioq_insert_tail(&sc->sc_inflight, bp);
1681 * Bump syncid on first write.
1683 if ((sc->sc_bump_id & G_MIRROR_BUMP_SYNCID) != 0) {
1684 sc->sc_bump_id &= ~G_MIRROR_BUMP_SYNCID;
1685 g_mirror_bump_syncid(sc);
1690 KASSERT(1 == 0, ("Invalid command here: %u (device=%s)",
1691 bp->bio_cmd, sc->sc_name));
1697 g_mirror_can_destroy(struct g_mirror_softc *sc)
1700 struct g_consumer *cp;
1702 g_topology_assert();
1704 if (gp->softc == NULL)
1706 if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_TASTING) != 0)
1708 LIST_FOREACH(cp, &gp->consumer, consumer) {
1709 if (g_mirror_is_busy(sc, cp))
1712 gp = sc->sc_sync.ds_geom;
1713 LIST_FOREACH(cp, &gp->consumer, consumer) {
1714 if (g_mirror_is_busy(sc, cp))
1717 G_MIRROR_DEBUG(2, "No I/O requests for %s, it can be destroyed.",
1723 g_mirror_try_destroy(struct g_mirror_softc *sc)
1726 if (sc->sc_rootmount != NULL) {
1727 G_MIRROR_DEBUG(1, "root_mount_rel[%u] %p", __LINE__,
1729 root_mount_rel(sc->sc_rootmount);
1730 sc->sc_rootmount = NULL;
1733 if (!g_mirror_can_destroy(sc)) {
1734 g_topology_unlock();
1737 sc->sc_geom->softc = NULL;
1738 sc->sc_sync.ds_geom->softc = NULL;
1739 if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_WAIT) != 0) {
1740 g_topology_unlock();
1741 G_MIRROR_DEBUG(4, "%s: Waking up %p.", __func__,
1743 /* Unlock sc_lock here, as it can be destroyed after wakeup. */
1744 sx_xunlock(&sc->sc_lock);
1745 wakeup(&sc->sc_worker);
1746 sc->sc_worker = NULL;
1748 g_topology_unlock();
1749 g_mirror_destroy_device(sc);
1759 g_mirror_worker(void *arg)
1761 struct g_mirror_softc *sc;
1762 struct g_mirror_event *ep;
1767 thread_lock(curthread);
1768 sched_prio(curthread, PRIBIO);
1769 thread_unlock(curthread);
1771 sx_xlock(&sc->sc_lock);
1773 G_MIRROR_DEBUG(5, "%s: Let's see...", __func__);
1775 * First take a look at events.
1776 * This is important to handle events before any I/O requests.
1778 ep = g_mirror_event_get(sc);
1780 g_mirror_event_remove(sc, ep);
1781 if ((ep->e_flags & G_MIRROR_EVENT_DEVICE) != 0) {
1782 /* Update only device status. */
1784 "Running event for device %s.",
1787 g_mirror_update_device(sc, 1);
1789 /* Update disk status. */
1790 G_MIRROR_DEBUG(3, "Running event for disk %s.",
1791 g_mirror_get_diskname(ep->e_disk));
1792 ep->e_error = g_mirror_update_disk(ep->e_disk,
1794 if (ep->e_error == 0)
1795 g_mirror_update_device(sc, 0);
1797 if ((ep->e_flags & G_MIRROR_EVENT_DONTWAIT) != 0) {
1798 KASSERT(ep->e_error == 0,
1799 ("Error cannot be handled."));
1800 g_mirror_event_free(ep);
1802 ep->e_flags |= G_MIRROR_EVENT_DONE;
1803 G_MIRROR_DEBUG(4, "%s: Waking up %p.", __func__,
1805 mtx_lock(&sc->sc_events_mtx);
1807 mtx_unlock(&sc->sc_events_mtx);
1810 G_MIRROR_DEVICE_FLAG_DESTROY) != 0) {
1811 if (g_mirror_try_destroy(sc)) {
1812 curthread->td_pflags &= ~TDP_GEOM;
1813 G_MIRROR_DEBUG(1, "Thread exiting.");
1817 G_MIRROR_DEBUG(5, "%s: I'm here 1.", __func__);
1821 * Check if we can mark array as CLEAN and if we can't take
1822 * how much seconds should we wait.
1824 timeout = g_mirror_idle(sc, -1);
1828 /* Get first request from the queue. */
1829 mtx_lock(&sc->sc_queue_mtx);
1830 bp = bioq_first(&sc->sc_queue);
1833 G_MIRROR_DEVICE_FLAG_DESTROY) != 0) {
1834 mtx_unlock(&sc->sc_queue_mtx);
1835 if (g_mirror_try_destroy(sc)) {
1836 curthread->td_pflags &= ~TDP_GEOM;
1837 G_MIRROR_DEBUG(1, "Thread exiting.");
1840 mtx_lock(&sc->sc_queue_mtx);
1842 sx_xunlock(&sc->sc_lock);
1844 * XXX: We can miss an event here, because an event
1845 * can be added without sx-device-lock and without
1846 * mtx-queue-lock. Maybe I should just stop using
1847 * dedicated mutex for events synchronization and
1848 * stick with the queue lock?
1849 * The event will hang here until next I/O request
1850 * or next event is received.
1852 MSLEEP(sc, &sc->sc_queue_mtx, PRIBIO | PDROP, "m:w1",
1854 sx_xlock(&sc->sc_lock);
1855 G_MIRROR_DEBUG(5, "%s: I'm here 4.", __func__);
1858 bioq_remove(&sc->sc_queue, bp);
1859 mtx_unlock(&sc->sc_queue_mtx);
1861 if (bp->bio_from->geom == sc->sc_sync.ds_geom &&
1862 (bp->bio_cflags & G_MIRROR_BIO_FLAG_SYNC) != 0) {
1863 g_mirror_sync_request(bp); /* READ */
1864 } else if (bp->bio_to != sc->sc_provider) {
1865 if ((bp->bio_cflags & G_MIRROR_BIO_FLAG_REGULAR) != 0)
1866 g_mirror_regular_request(bp);
1867 else if ((bp->bio_cflags & G_MIRROR_BIO_FLAG_SYNC) != 0)
1868 g_mirror_sync_request(bp); /* WRITE */
1871 ("Invalid request cflags=0x%hhx to=%s.",
1872 bp->bio_cflags, bp->bio_to->name));
1875 g_mirror_register_request(bp);
1877 G_MIRROR_DEBUG(5, "%s: I'm here 9.", __func__);
1882 g_mirror_update_idle(struct g_mirror_softc *sc, struct g_mirror_disk *disk)
1885 sx_assert(&sc->sc_lock, SX_LOCKED);
1887 if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_NOFAILSYNC) != 0)
1889 if (!sc->sc_idle && (disk->d_flags & G_MIRROR_DISK_FLAG_DIRTY) == 0) {
1890 G_MIRROR_DEBUG(1, "Disk %s (device %s) marked as dirty.",
1891 g_mirror_get_diskname(disk), sc->sc_name);
1892 disk->d_flags |= G_MIRROR_DISK_FLAG_DIRTY;
1893 } else if (sc->sc_idle &&
1894 (disk->d_flags & G_MIRROR_DISK_FLAG_DIRTY) != 0) {
1895 G_MIRROR_DEBUG(1, "Disk %s (device %s) marked as clean.",
1896 g_mirror_get_diskname(disk), sc->sc_name);
1897 disk->d_flags &= ~G_MIRROR_DISK_FLAG_DIRTY;
1902 g_mirror_sync_start(struct g_mirror_disk *disk)
1904 struct g_mirror_softc *sc;
1905 struct g_consumer *cp;
1909 g_topology_assert_not();
1911 sx_assert(&sc->sc_lock, SX_LOCKED);
1913 KASSERT(disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING,
1914 ("Disk %s is not marked for synchronization.",
1915 g_mirror_get_diskname(disk)));
1916 KASSERT(sc->sc_state == G_MIRROR_DEVICE_STATE_RUNNING,
1917 ("Device not in RUNNING state (%s, %u).", sc->sc_name,
1920 sx_xunlock(&sc->sc_lock);
1922 cp = g_new_consumer(sc->sc_sync.ds_geom);
1923 error = g_attach(cp, sc->sc_provider);
1925 ("Cannot attach to %s (error=%d).", sc->sc_name, error));
1926 error = g_access(cp, 1, 0, 0);
1927 KASSERT(error == 0, ("Cannot open %s (error=%d).", sc->sc_name, error));
1928 g_topology_unlock();
1929 sx_xlock(&sc->sc_lock);
1931 G_MIRROR_DEBUG(0, "Device %s: rebuilding provider %s.", sc->sc_name,
1932 g_mirror_get_diskname(disk));
1933 if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_NOFAILSYNC) == 0)
1934 disk->d_flags |= G_MIRROR_DISK_FLAG_DIRTY;
1935 KASSERT(disk->d_sync.ds_consumer == NULL,
1936 ("Sync consumer already exists (device=%s, disk=%s).",
1937 sc->sc_name, g_mirror_get_diskname(disk)));
1939 disk->d_sync.ds_consumer = cp;
1940 disk->d_sync.ds_consumer->private = disk;
1941 disk->d_sync.ds_consumer->index = 0;
1944 * Allocate memory for synchronization bios and initialize them.
1946 disk->d_sync.ds_bios = malloc(sizeof(struct bio *) * g_mirror_syncreqs,
1947 M_MIRROR, M_WAITOK);
1948 for (i = 0; i < g_mirror_syncreqs; i++) {
1950 disk->d_sync.ds_bios[i] = bp;
1951 bp->bio_parent = NULL;
1952 bp->bio_cmd = BIO_READ;
1953 bp->bio_data = malloc(MAXPHYS, M_MIRROR, M_WAITOK);
1955 bp->bio_offset = disk->d_sync.ds_offset;
1956 bp->bio_length = MIN(MAXPHYS, sc->sc_mediasize - bp->bio_offset);
1957 disk->d_sync.ds_offset += bp->bio_length;
1958 bp->bio_done = g_mirror_sync_done;
1959 bp->bio_from = disk->d_sync.ds_consumer;
1960 bp->bio_to = sc->sc_provider;
1961 bp->bio_caller1 = (void *)(uintptr_t)i;
1964 /* Increase the number of disks in SYNCHRONIZING state. */
1965 sc->sc_sync.ds_ndisks++;
1966 /* Set the number of in-flight synchronization requests. */
1967 disk->d_sync.ds_inflight = g_mirror_syncreqs;
1970 * Fire off first synchronization requests.
1972 for (i = 0; i < g_mirror_syncreqs; i++) {
1973 bp = disk->d_sync.ds_bios[i];
1974 G_MIRROR_LOGREQ(3, bp, "Sending synchronization request.");
1975 disk->d_sync.ds_consumer->index++;
1977 * Delay the request if it is colliding with a regular request.
1979 if (g_mirror_regular_collision(sc, bp))
1980 g_mirror_sync_delay(sc, bp);
1982 g_io_request(bp, disk->d_sync.ds_consumer);
1987 * Stop synchronization process.
1988 * type: 0 - synchronization finished
1989 * 1 - synchronization stopped
1992 g_mirror_sync_stop(struct g_mirror_disk *disk, int type)
1994 struct g_mirror_softc *sc;
1995 struct g_consumer *cp;
1997 g_topology_assert_not();
1999 sx_assert(&sc->sc_lock, SX_LOCKED);
2001 KASSERT(disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING,
2002 ("Wrong disk state (%s, %s).", g_mirror_get_diskname(disk),
2003 g_mirror_disk_state2str(disk->d_state)));
2004 if (disk->d_sync.ds_consumer == NULL)
2008 G_MIRROR_DEBUG(0, "Device %s: rebuilding provider %s finished.",
2009 sc->sc_name, g_mirror_get_diskname(disk));
2010 } else /* if (type == 1) */ {
2011 G_MIRROR_DEBUG(0, "Device %s: rebuilding provider %s stopped.",
2012 sc->sc_name, g_mirror_get_diskname(disk));
2014 free(disk->d_sync.ds_bios, M_MIRROR);
2015 disk->d_sync.ds_bios = NULL;
2016 cp = disk->d_sync.ds_consumer;
2017 disk->d_sync.ds_consumer = NULL;
2018 disk->d_flags &= ~G_MIRROR_DISK_FLAG_DIRTY;
2019 sc->sc_sync.ds_ndisks--;
2020 sx_xunlock(&sc->sc_lock); /* Avoid recursion on sc_lock. */
2022 g_mirror_kill_consumer(sc, cp);
2023 g_topology_unlock();
2024 sx_xlock(&sc->sc_lock);
2028 g_mirror_launch_provider(struct g_mirror_softc *sc)
2030 struct g_mirror_disk *disk;
2031 struct g_provider *pp, *dp;
2033 sx_assert(&sc->sc_lock, SX_LOCKED);
2036 pp = g_new_providerf(sc->sc_geom, "mirror/%s", sc->sc_name);
2037 pp->mediasize = sc->sc_mediasize;
2038 pp->sectorsize = sc->sc_sectorsize;
2040 pp->stripeoffset = 0;
2042 /* Splitting of unmapped BIO's could work but isn't implemented now */
2043 if (sc->sc_balance != G_MIRROR_BALANCE_SPLIT)
2044 pp->flags |= G_PF_ACCEPT_UNMAPPED;
2046 LIST_FOREACH(disk, &sc->sc_disks, d_next) {
2047 if (disk->d_consumer && disk->d_consumer->provider) {
2048 dp = disk->d_consumer->provider;
2049 if (dp->stripesize > pp->stripesize) {
2050 pp->stripesize = dp->stripesize;
2051 pp->stripeoffset = dp->stripeoffset;
2053 /* A provider underneath us doesn't support unmapped */
2054 if ((dp->flags & G_PF_ACCEPT_UNMAPPED) == 0) {
2055 G_MIRROR_DEBUG(0, "Cancelling unmapped "
2056 "because of %s.", dp->name);
2057 pp->flags &= ~G_PF_ACCEPT_UNMAPPED;
2061 sc->sc_provider = pp;
2062 g_error_provider(pp, 0);
2063 g_topology_unlock();
2064 G_MIRROR_DEBUG(0, "Device %s launched (%u/%u).", pp->name,
2065 g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_ACTIVE), sc->sc_ndisks);
2066 LIST_FOREACH(disk, &sc->sc_disks, d_next) {
2067 if (disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING)
2068 g_mirror_sync_start(disk);
2073 g_mirror_destroy_provider(struct g_mirror_softc *sc)
2075 struct g_mirror_disk *disk;
2078 g_topology_assert_not();
2079 KASSERT(sc->sc_provider != NULL, ("NULL provider (device=%s).",
2083 g_error_provider(sc->sc_provider, ENXIO);
2084 mtx_lock(&sc->sc_queue_mtx);
2085 while ((bp = bioq_first(&sc->sc_queue)) != NULL) {
2086 bioq_remove(&sc->sc_queue, bp);
2087 g_io_deliver(bp, ENXIO);
2089 mtx_unlock(&sc->sc_queue_mtx);
2090 G_MIRROR_DEBUG(0, "Device %s: provider %s destroyed.", sc->sc_name,
2091 sc->sc_provider->name);
2092 sc->sc_provider->flags |= G_PF_WITHER;
2093 g_orphan_provider(sc->sc_provider, ENXIO);
2094 g_topology_unlock();
2095 sc->sc_provider = NULL;
2096 LIST_FOREACH(disk, &sc->sc_disks, d_next) {
2097 if (disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING)
2098 g_mirror_sync_stop(disk, 1);
2103 g_mirror_go(void *arg)
2105 struct g_mirror_softc *sc;
2108 G_MIRROR_DEBUG(0, "Force device %s start due to timeout.", sc->sc_name);
2109 g_mirror_event_send(sc, 0,
2110 G_MIRROR_EVENT_DONTWAIT | G_MIRROR_EVENT_DEVICE);
2114 g_mirror_determine_state(struct g_mirror_disk *disk)
2116 struct g_mirror_softc *sc;
2120 if (sc->sc_syncid == disk->d_sync.ds_syncid) {
2121 if ((disk->d_flags &
2122 G_MIRROR_DISK_FLAG_SYNCHRONIZING) == 0) {
2123 /* Disk does not need synchronization. */
2124 state = G_MIRROR_DISK_STATE_ACTIVE;
2127 G_MIRROR_DEVICE_FLAG_NOAUTOSYNC) == 0 ||
2129 G_MIRROR_DISK_FLAG_FORCE_SYNC) != 0) {
2131 * We can start synchronization from
2132 * the stored offset.
2134 state = G_MIRROR_DISK_STATE_SYNCHRONIZING;
2136 state = G_MIRROR_DISK_STATE_STALE;
2139 } else if (disk->d_sync.ds_syncid < sc->sc_syncid) {
2141 * Reset all synchronization data for this disk,
2142 * because if it even was synchronized, it was
2143 * synchronized to disks with different syncid.
2145 disk->d_flags |= G_MIRROR_DISK_FLAG_SYNCHRONIZING;
2146 disk->d_sync.ds_offset = 0;
2147 disk->d_sync.ds_offset_done = 0;
2148 disk->d_sync.ds_syncid = sc->sc_syncid;
2149 if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_NOAUTOSYNC) == 0 ||
2150 (disk->d_flags & G_MIRROR_DISK_FLAG_FORCE_SYNC) != 0) {
2151 state = G_MIRROR_DISK_STATE_SYNCHRONIZING;
2153 state = G_MIRROR_DISK_STATE_STALE;
2155 } else /* if (sc->sc_syncid < disk->d_sync.ds_syncid) */ {
2157 * Not good, NOT GOOD!
2158 * It means that mirror was started on stale disks
2159 * and more fresh disk just arrive.
2160 * If there were writes, mirror is broken, sorry.
2161 * I think the best choice here is don't touch
2162 * this disk and inform the user loudly.
2164 G_MIRROR_DEBUG(0, "Device %s was started before the freshest "
2165 "disk (%s) arrives!! It will not be connected to the "
2166 "running device.", sc->sc_name,
2167 g_mirror_get_diskname(disk));
2168 g_mirror_destroy_disk(disk);
2169 state = G_MIRROR_DISK_STATE_NONE;
2170 /* Return immediately, because disk was destroyed. */
2173 G_MIRROR_DEBUG(3, "State for %s disk: %s.",
2174 g_mirror_get_diskname(disk), g_mirror_disk_state2str(state));
2179 * Update device state.
2182 g_mirror_update_device(struct g_mirror_softc *sc, boolean_t force)
2184 struct g_mirror_disk *disk;
2187 sx_assert(&sc->sc_lock, SX_XLOCKED);
2189 switch (sc->sc_state) {
2190 case G_MIRROR_DEVICE_STATE_STARTING:
2192 struct g_mirror_disk *pdisk, *tdisk;
2193 u_int dirty, ndisks, genid, syncid;
2195 KASSERT(sc->sc_provider == NULL,
2196 ("Non-NULL provider in STARTING state (%s).", sc->sc_name));
2198 * Are we ready? We are, if all disks are connected or
2199 * if we have any disks and 'force' is true.
2201 ndisks = g_mirror_ndisks(sc, -1);
2202 if (sc->sc_ndisks == ndisks || (force && ndisks > 0)) {
2204 } else if (ndisks == 0) {
2206 * Disks went down in starting phase, so destroy
2209 callout_drain(&sc->sc_callout);
2210 sc->sc_flags |= G_MIRROR_DEVICE_FLAG_DESTROY;
2211 G_MIRROR_DEBUG(1, "root_mount_rel[%u] %p", __LINE__,
2213 root_mount_rel(sc->sc_rootmount);
2214 sc->sc_rootmount = NULL;
2221 * Activate all disks with the biggest syncid.
2225 * If 'force' is true, we have been called due to
2226 * timeout, so don't bother canceling timeout.
2229 LIST_FOREACH(disk, &sc->sc_disks, d_next) {
2230 if ((disk->d_flags &
2231 G_MIRROR_DISK_FLAG_SYNCHRONIZING) == 0) {
2236 /* No valid disks found, destroy device. */
2237 sc->sc_flags |= G_MIRROR_DEVICE_FLAG_DESTROY;
2238 G_MIRROR_DEBUG(1, "root_mount_rel[%u] %p",
2239 __LINE__, sc->sc_rootmount);
2240 root_mount_rel(sc->sc_rootmount);
2241 sc->sc_rootmount = NULL;
2245 /* Cancel timeout. */
2246 callout_drain(&sc->sc_callout);
2250 * Find the biggest genid.
2253 LIST_FOREACH(disk, &sc->sc_disks, d_next) {
2254 if (disk->d_genid > genid)
2255 genid = disk->d_genid;
2257 sc->sc_genid = genid;
2259 * Remove all disks without the biggest genid.
2261 LIST_FOREACH_SAFE(disk, &sc->sc_disks, d_next, tdisk) {
2262 if (disk->d_genid < genid) {
2264 "Component %s (device %s) broken, skipping.",
2265 g_mirror_get_diskname(disk), sc->sc_name);
2266 g_mirror_destroy_disk(disk);
2271 * Find the biggest syncid.
2274 LIST_FOREACH(disk, &sc->sc_disks, d_next) {
2275 if (disk->d_sync.ds_syncid > syncid)
2276 syncid = disk->d_sync.ds_syncid;
2280 * Here we need to look for dirty disks and if all disks
2281 * with the biggest syncid are dirty, we have to choose
2282 * one with the biggest priority and rebuild the rest.
2285 * Find the number of dirty disks with the biggest syncid.
2286 * Find the number of disks with the biggest syncid.
2287 * While here, find a disk with the biggest priority.
2291 LIST_FOREACH(disk, &sc->sc_disks, d_next) {
2292 if (disk->d_sync.ds_syncid != syncid)
2294 if ((disk->d_flags &
2295 G_MIRROR_DISK_FLAG_SYNCHRONIZING) != 0) {
2299 if ((disk->d_flags & G_MIRROR_DISK_FLAG_DIRTY) != 0) {
2301 if (pdisk == NULL ||
2302 pdisk->d_priority < disk->d_priority) {
2308 /* No dirty disks at all, great. */
2309 } else if (dirty == ndisks) {
2311 * Force synchronization for all dirty disks except one
2312 * with the biggest priority.
2314 KASSERT(pdisk != NULL, ("pdisk == NULL"));
2315 G_MIRROR_DEBUG(1, "Using disk %s (device %s) as a "
2316 "master disk for synchronization.",
2317 g_mirror_get_diskname(pdisk), sc->sc_name);
2318 LIST_FOREACH(disk, &sc->sc_disks, d_next) {
2319 if (disk->d_sync.ds_syncid != syncid)
2321 if ((disk->d_flags &
2322 G_MIRROR_DISK_FLAG_SYNCHRONIZING) != 0) {
2325 KASSERT((disk->d_flags &
2326 G_MIRROR_DISK_FLAG_DIRTY) != 0,
2327 ("Disk %s isn't marked as dirty.",
2328 g_mirror_get_diskname(disk)));
2329 /* Skip the disk with the biggest priority. */
2332 disk->d_sync.ds_syncid = 0;
2334 } else if (dirty < ndisks) {
2336 * Force synchronization for all dirty disks.
2337 * We have some non-dirty disks.
2339 LIST_FOREACH(disk, &sc->sc_disks, d_next) {
2340 if (disk->d_sync.ds_syncid != syncid)
2342 if ((disk->d_flags &
2343 G_MIRROR_DISK_FLAG_SYNCHRONIZING) != 0) {
2346 if ((disk->d_flags &
2347 G_MIRROR_DISK_FLAG_DIRTY) == 0) {
2350 disk->d_sync.ds_syncid = 0;
2356 sc->sc_syncid = syncid;
2358 /* Remember to bump syncid on first write. */
2359 sc->sc_bump_id |= G_MIRROR_BUMP_SYNCID;
2361 state = G_MIRROR_DEVICE_STATE_RUNNING;
2362 G_MIRROR_DEBUG(1, "Device %s state changed from %s to %s.",
2363 sc->sc_name, g_mirror_device_state2str(sc->sc_state),
2364 g_mirror_device_state2str(state));
2365 sc->sc_state = state;
2366 LIST_FOREACH(disk, &sc->sc_disks, d_next) {
2367 state = g_mirror_determine_state(disk);
2368 g_mirror_event_send(disk, state,
2369 G_MIRROR_EVENT_DONTWAIT);
2370 if (state == G_MIRROR_DISK_STATE_STALE)
2371 sc->sc_bump_id |= G_MIRROR_BUMP_SYNCID;
2375 case G_MIRROR_DEVICE_STATE_RUNNING:
2376 if (g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_ACTIVE) == 0 &&
2377 g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_NEW) == 0) {
2379 * No active disks or no disks at all,
2380 * so destroy device.
2382 if (sc->sc_provider != NULL)
2383 g_mirror_destroy_provider(sc);
2384 sc->sc_flags |= G_MIRROR_DEVICE_FLAG_DESTROY;
2386 } else if (g_mirror_ndisks(sc,
2387 G_MIRROR_DISK_STATE_ACTIVE) > 0 &&
2388 g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_NEW) == 0) {
2390 * We have active disks, launch provider if it doesn't
2393 if (sc->sc_provider == NULL)
2394 g_mirror_launch_provider(sc);
2395 if (sc->sc_rootmount != NULL) {
2396 G_MIRROR_DEBUG(1, "root_mount_rel[%u] %p",
2397 __LINE__, sc->sc_rootmount);
2398 root_mount_rel(sc->sc_rootmount);
2399 sc->sc_rootmount = NULL;
2403 * Genid should be bumped immediately, so do it here.
2405 if ((sc->sc_bump_id & G_MIRROR_BUMP_GENID) != 0) {
2406 sc->sc_bump_id &= ~G_MIRROR_BUMP_GENID;
2407 g_mirror_bump_genid(sc);
2411 KASSERT(1 == 0, ("Wrong device state (%s, %s).",
2412 sc->sc_name, g_mirror_device_state2str(sc->sc_state)));
2418 * Update disk state and device state if needed.
2420 #define DISK_STATE_CHANGED() G_MIRROR_DEBUG(1, \
2421 "Disk %s state changed from %s to %s (device %s).", \
2422 g_mirror_get_diskname(disk), \
2423 g_mirror_disk_state2str(disk->d_state), \
2424 g_mirror_disk_state2str(state), sc->sc_name)
2426 g_mirror_update_disk(struct g_mirror_disk *disk, u_int state)
2428 struct g_mirror_softc *sc;
2431 sx_assert(&sc->sc_lock, SX_XLOCKED);
2434 G_MIRROR_DEBUG(3, "Changing disk %s state from %s to %s.",
2435 g_mirror_get_diskname(disk), g_mirror_disk_state2str(disk->d_state),
2436 g_mirror_disk_state2str(state));
2438 case G_MIRROR_DISK_STATE_NEW:
2440 * Possible scenarios:
2441 * 1. New disk arrive.
2443 /* Previous state should be NONE. */
2444 KASSERT(disk->d_state == G_MIRROR_DISK_STATE_NONE,
2445 ("Wrong disk state (%s, %s).", g_mirror_get_diskname(disk),
2446 g_mirror_disk_state2str(disk->d_state)));
2447 DISK_STATE_CHANGED();
2449 disk->d_state = state;
2450 if (LIST_EMPTY(&sc->sc_disks))
2451 LIST_INSERT_HEAD(&sc->sc_disks, disk, d_next);
2453 struct g_mirror_disk *dp;
2455 LIST_FOREACH(dp, &sc->sc_disks, d_next) {
2456 if (disk->d_priority >= dp->d_priority) {
2457 LIST_INSERT_BEFORE(dp, disk, d_next);
2461 if (LIST_NEXT(dp, d_next) == NULL)
2465 LIST_INSERT_AFTER(dp, disk, d_next);
2467 G_MIRROR_DEBUG(1, "Device %s: provider %s detected.",
2468 sc->sc_name, g_mirror_get_diskname(disk));
2469 if (sc->sc_state == G_MIRROR_DEVICE_STATE_STARTING)
2471 KASSERT(sc->sc_state == G_MIRROR_DEVICE_STATE_RUNNING,
2472 ("Wrong device state (%s, %s, %s, %s).", sc->sc_name,
2473 g_mirror_device_state2str(sc->sc_state),
2474 g_mirror_get_diskname(disk),
2475 g_mirror_disk_state2str(disk->d_state)));
2476 state = g_mirror_determine_state(disk);
2477 if (state != G_MIRROR_DISK_STATE_NONE)
2480 case G_MIRROR_DISK_STATE_ACTIVE:
2482 * Possible scenarios:
2483 * 1. New disk does not need synchronization.
2484 * 2. Synchronization process finished successfully.
2486 KASSERT(sc->sc_state == G_MIRROR_DEVICE_STATE_RUNNING,
2487 ("Wrong device state (%s, %s, %s, %s).", sc->sc_name,
2488 g_mirror_device_state2str(sc->sc_state),
2489 g_mirror_get_diskname(disk),
2490 g_mirror_disk_state2str(disk->d_state)));
2491 /* Previous state should be NEW or SYNCHRONIZING. */
2492 KASSERT(disk->d_state == G_MIRROR_DISK_STATE_NEW ||
2493 disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING,
2494 ("Wrong disk state (%s, %s).", g_mirror_get_diskname(disk),
2495 g_mirror_disk_state2str(disk->d_state)));
2496 DISK_STATE_CHANGED();
2498 if (disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING) {
2499 disk->d_flags &= ~G_MIRROR_DISK_FLAG_SYNCHRONIZING;
2500 disk->d_flags &= ~G_MIRROR_DISK_FLAG_FORCE_SYNC;
2501 g_mirror_sync_stop(disk, 0);
2503 disk->d_state = state;
2504 disk->d_sync.ds_offset = 0;
2505 disk->d_sync.ds_offset_done = 0;
2506 g_mirror_update_idle(sc, disk);
2507 g_mirror_update_metadata(disk);
2508 G_MIRROR_DEBUG(1, "Device %s: provider %s activated.",
2509 sc->sc_name, g_mirror_get_diskname(disk));
2511 case G_MIRROR_DISK_STATE_STALE:
2513 * Possible scenarios:
2514 * 1. Stale disk was connected.
2516 /* Previous state should be NEW. */
2517 KASSERT(disk->d_state == G_MIRROR_DISK_STATE_NEW,
2518 ("Wrong disk state (%s, %s).", g_mirror_get_diskname(disk),
2519 g_mirror_disk_state2str(disk->d_state)));
2520 KASSERT(sc->sc_state == G_MIRROR_DEVICE_STATE_RUNNING,
2521 ("Wrong device state (%s, %s, %s, %s).", sc->sc_name,
2522 g_mirror_device_state2str(sc->sc_state),
2523 g_mirror_get_diskname(disk),
2524 g_mirror_disk_state2str(disk->d_state)));
2526 * STALE state is only possible if device is marked
2529 KASSERT((sc->sc_flags & G_MIRROR_DEVICE_FLAG_NOAUTOSYNC) != 0,
2530 ("Wrong device state (%s, %s, %s, %s).", sc->sc_name,
2531 g_mirror_device_state2str(sc->sc_state),
2532 g_mirror_get_diskname(disk),
2533 g_mirror_disk_state2str(disk->d_state)));
2534 DISK_STATE_CHANGED();
2536 disk->d_flags &= ~G_MIRROR_DISK_FLAG_DIRTY;
2537 disk->d_state = state;
2538 g_mirror_update_metadata(disk);
2539 G_MIRROR_DEBUG(0, "Device %s: provider %s is stale.",
2540 sc->sc_name, g_mirror_get_diskname(disk));
2542 case G_MIRROR_DISK_STATE_SYNCHRONIZING:
2544 * Possible scenarios:
2545 * 1. Disk which needs synchronization was connected.
2547 /* Previous state should be NEW. */
2548 KASSERT(disk->d_state == G_MIRROR_DISK_STATE_NEW,
2549 ("Wrong disk state (%s, %s).", g_mirror_get_diskname(disk),
2550 g_mirror_disk_state2str(disk->d_state)));
2551 KASSERT(sc->sc_state == G_MIRROR_DEVICE_STATE_RUNNING,
2552 ("Wrong device state (%s, %s, %s, %s).", sc->sc_name,
2553 g_mirror_device_state2str(sc->sc_state),
2554 g_mirror_get_diskname(disk),
2555 g_mirror_disk_state2str(disk->d_state)));
2556 DISK_STATE_CHANGED();
2558 if (disk->d_state == G_MIRROR_DISK_STATE_NEW)
2559 disk->d_flags &= ~G_MIRROR_DISK_FLAG_DIRTY;
2560 disk->d_state = state;
2561 if (sc->sc_provider != NULL) {
2562 g_mirror_sync_start(disk);
2563 g_mirror_update_metadata(disk);
2566 case G_MIRROR_DISK_STATE_DISCONNECTED:
2568 * Possible scenarios:
2569 * 1. Device wasn't running yet, but disk disappear.
2570 * 2. Disk was active and disapppear.
2571 * 3. Disk disappear during synchronization process.
2573 if (sc->sc_state == G_MIRROR_DEVICE_STATE_RUNNING) {
2575 * Previous state should be ACTIVE, STALE or
2578 KASSERT(disk->d_state == G_MIRROR_DISK_STATE_ACTIVE ||
2579 disk->d_state == G_MIRROR_DISK_STATE_STALE ||
2580 disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING,
2581 ("Wrong disk state (%s, %s).",
2582 g_mirror_get_diskname(disk),
2583 g_mirror_disk_state2str(disk->d_state)));
2584 } else if (sc->sc_state == G_MIRROR_DEVICE_STATE_STARTING) {
2585 /* Previous state should be NEW. */
2586 KASSERT(disk->d_state == G_MIRROR_DISK_STATE_NEW,
2587 ("Wrong disk state (%s, %s).",
2588 g_mirror_get_diskname(disk),
2589 g_mirror_disk_state2str(disk->d_state)));
2591 * Reset bumping syncid if disk disappeared in STARTING
2594 if ((sc->sc_bump_id & G_MIRROR_BUMP_SYNCID) != 0)
2595 sc->sc_bump_id &= ~G_MIRROR_BUMP_SYNCID;
2598 KASSERT(1 == 0, ("Wrong device state (%s, %s, %s, %s).",
2600 g_mirror_device_state2str(sc->sc_state),
2601 g_mirror_get_diskname(disk),
2602 g_mirror_disk_state2str(disk->d_state)));
2605 DISK_STATE_CHANGED();
2606 G_MIRROR_DEBUG(0, "Device %s: provider %s disconnected.",
2607 sc->sc_name, g_mirror_get_diskname(disk));
2609 g_mirror_destroy_disk(disk);
2611 case G_MIRROR_DISK_STATE_DESTROY:
2615 error = g_mirror_clear_metadata(disk);
2618 DISK_STATE_CHANGED();
2619 G_MIRROR_DEBUG(0, "Device %s: provider %s destroyed.",
2620 sc->sc_name, g_mirror_get_diskname(disk));
2622 g_mirror_destroy_disk(disk);
2624 LIST_FOREACH(disk, &sc->sc_disks, d_next) {
2625 g_mirror_update_metadata(disk);
2630 KASSERT(1 == 0, ("Unknown state (%u).", state));
2635 #undef DISK_STATE_CHANGED
2638 g_mirror_read_metadata(struct g_consumer *cp, struct g_mirror_metadata *md)
2640 struct g_provider *pp;
2644 g_topology_assert();
2646 error = g_access(cp, 1, 0, 0);
2650 g_topology_unlock();
2651 /* Metadata are stored on last sector. */
2652 buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize,
2655 g_access(cp, -1, 0, 0);
2657 G_MIRROR_DEBUG(1, "Cannot read metadata from %s (error=%d).",
2658 cp->provider->name, error);
2662 /* Decode metadata. */
2663 error = mirror_metadata_decode(buf, md);
2665 if (strcmp(md->md_magic, G_MIRROR_MAGIC) != 0)
2667 if (md->md_version > G_MIRROR_VERSION) {
2669 "Kernel module is too old to handle metadata from %s.",
2670 cp->provider->name);
2674 G_MIRROR_DEBUG(1, "MD5 metadata hash mismatch for provider %s.",
2675 cp->provider->name);
2683 g_mirror_check_metadata(struct g_mirror_softc *sc, struct g_provider *pp,
2684 struct g_mirror_metadata *md)
2687 if (g_mirror_id2disk(sc, md->md_did) != NULL) {
2688 G_MIRROR_DEBUG(1, "Disk %s (id=%u) already exists, skipping.",
2689 pp->name, md->md_did);
2692 if (md->md_all != sc->sc_ndisks) {
2694 "Invalid '%s' field on disk %s (device %s), skipping.",
2695 "md_all", pp->name, sc->sc_name);
2698 if (md->md_slice != sc->sc_slice) {
2700 "Invalid '%s' field on disk %s (device %s), skipping.",
2701 "md_slice", pp->name, sc->sc_name);
2704 if (md->md_balance != sc->sc_balance) {
2706 "Invalid '%s' field on disk %s (device %s), skipping.",
2707 "md_balance", pp->name, sc->sc_name);
2710 if (md->md_mediasize != sc->sc_mediasize) {
2712 "Invalid '%s' field on disk %s (device %s), skipping.",
2713 "md_mediasize", pp->name, sc->sc_name);
2716 if (sc->sc_mediasize > pp->mediasize) {
2718 "Invalid size of disk %s (device %s), skipping.", pp->name,
2722 if (md->md_sectorsize != sc->sc_sectorsize) {
2724 "Invalid '%s' field on disk %s (device %s), skipping.",
2725 "md_sectorsize", pp->name, sc->sc_name);
2728 if ((sc->sc_sectorsize % pp->sectorsize) != 0) {
2730 "Invalid sector size of disk %s (device %s), skipping.",
2731 pp->name, sc->sc_name);
2734 if ((md->md_mflags & ~G_MIRROR_DEVICE_FLAG_MASK) != 0) {
2736 "Invalid device flags on disk %s (device %s), skipping.",
2737 pp->name, sc->sc_name);
2740 if ((md->md_dflags & ~G_MIRROR_DISK_FLAG_MASK) != 0) {
2742 "Invalid disk flags on disk %s (device %s), skipping.",
2743 pp->name, sc->sc_name);
2750 g_mirror_add_disk(struct g_mirror_softc *sc, struct g_provider *pp,
2751 struct g_mirror_metadata *md)
2753 struct g_mirror_disk *disk;
2756 g_topology_assert_not();
2757 G_MIRROR_DEBUG(2, "Adding disk %s.", pp->name);
2759 error = g_mirror_check_metadata(sc, pp, md);
2762 if (sc->sc_state == G_MIRROR_DEVICE_STATE_RUNNING &&
2763 md->md_genid < sc->sc_genid) {
2764 G_MIRROR_DEBUG(0, "Component %s (device %s) broken, skipping.",
2765 pp->name, sc->sc_name);
2768 disk = g_mirror_init_disk(sc, pp, md, &error);
2771 error = g_mirror_event_send(disk, G_MIRROR_DISK_STATE_NEW,
2772 G_MIRROR_EVENT_WAIT);
2775 if (md->md_version < G_MIRROR_VERSION) {
2776 G_MIRROR_DEBUG(0, "Upgrading metadata on %s (v%d->v%d).",
2777 pp->name, md->md_version, G_MIRROR_VERSION);
2778 g_mirror_update_metadata(disk);
2784 g_mirror_destroy_delayed(void *arg, int flag)
2786 struct g_mirror_softc *sc;
2789 if (flag == EV_CANCEL) {
2790 G_MIRROR_DEBUG(1, "Destroying canceled.");
2794 g_topology_unlock();
2795 sx_xlock(&sc->sc_lock);
2796 KASSERT((sc->sc_flags & G_MIRROR_DEVICE_FLAG_DESTROY) == 0,
2797 ("DESTROY flag set on %s.", sc->sc_name));
2798 KASSERT((sc->sc_flags & G_MIRROR_DEVICE_FLAG_DESTROYING) != 0,
2799 ("DESTROYING flag not set on %s.", sc->sc_name));
2800 G_MIRROR_DEBUG(1, "Destroying %s (delayed).", sc->sc_name);
2801 error = g_mirror_destroy(sc, G_MIRROR_DESTROY_SOFT);
2803 G_MIRROR_DEBUG(0, "Cannot destroy %s.", sc->sc_name);
2804 sx_xunlock(&sc->sc_lock);
2810 g_mirror_access(struct g_provider *pp, int acr, int acw, int ace)
2812 struct g_mirror_softc *sc;
2813 int dcr, dcw, dce, error = 0;
2815 g_topology_assert();
2816 G_MIRROR_DEBUG(2, "Access request for %s: r%dw%de%d.", pp->name, acr,
2819 sc = pp->geom->softc;
2820 if (sc == NULL && acr <= 0 && acw <= 0 && ace <= 0)
2822 KASSERT(sc != NULL, ("NULL softc (provider=%s).", pp->name));
2824 dcr = pp->acr + acr;
2825 dcw = pp->acw + acw;
2826 dce = pp->ace + ace;
2828 g_topology_unlock();
2829 sx_xlock(&sc->sc_lock);
2830 if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_DESTROY) != 0 ||
2831 LIST_EMPTY(&sc->sc_disks)) {
2832 if (acr > 0 || acw > 0 || ace > 0)
2837 g_mirror_idle(sc, dcw);
2838 if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_DESTROYING) != 0) {
2839 if (acr > 0 || acw > 0 || ace > 0) {
2843 if (dcr == 0 && dcw == 0 && dce == 0) {
2844 g_post_event(g_mirror_destroy_delayed, sc, M_WAITOK,
2849 sx_xunlock(&sc->sc_lock);
2854 static struct g_geom *
2855 g_mirror_create(struct g_class *mp, const struct g_mirror_metadata *md)
2857 struct g_mirror_softc *sc;
2861 g_topology_assert();
2862 G_MIRROR_DEBUG(1, "Creating device %s (id=%u).", md->md_name,
2865 /* One disk is minimum. */
2871 gp = g_new_geomf(mp, "%s", md->md_name);
2872 sc = malloc(sizeof(*sc), M_MIRROR, M_WAITOK | M_ZERO);
2873 gp->start = g_mirror_start;
2874 gp->orphan = g_mirror_orphan;
2875 gp->access = g_mirror_access;
2876 gp->dumpconf = g_mirror_dumpconf;
2878 sc->sc_id = md->md_mid;
2879 sc->sc_slice = md->md_slice;
2880 sc->sc_balance = md->md_balance;
2881 sc->sc_mediasize = md->md_mediasize;
2882 sc->sc_sectorsize = md->md_sectorsize;
2883 sc->sc_ndisks = md->md_all;
2884 sc->sc_flags = md->md_mflags;
2887 sc->sc_last_write = time_uptime;
2889 sx_init(&sc->sc_lock, "gmirror:lock");
2890 bioq_init(&sc->sc_queue);
2891 mtx_init(&sc->sc_queue_mtx, "gmirror:queue", NULL, MTX_DEF);
2892 bioq_init(&sc->sc_regular_delayed);
2893 bioq_init(&sc->sc_inflight);
2894 bioq_init(&sc->sc_sync_delayed);
2895 LIST_INIT(&sc->sc_disks);
2896 TAILQ_INIT(&sc->sc_events);
2897 mtx_init(&sc->sc_events_mtx, "gmirror:events", NULL, MTX_DEF);
2898 callout_init(&sc->sc_callout, CALLOUT_MPSAFE);
2899 sc->sc_state = G_MIRROR_DEVICE_STATE_STARTING;
2902 sc->sc_provider = NULL;
2904 * Synchronization geom.
2906 gp = g_new_geomf(mp, "%s.sync", md->md_name);
2908 gp->orphan = g_mirror_orphan;
2909 sc->sc_sync.ds_geom = gp;
2910 sc->sc_sync.ds_ndisks = 0;
2911 error = kproc_create(g_mirror_worker, sc, &sc->sc_worker, 0, 0,
2912 "g_mirror %s", md->md_name);
2914 G_MIRROR_DEBUG(1, "Cannot create kernel thread for %s.",
2916 g_destroy_geom(sc->sc_sync.ds_geom);
2917 mtx_destroy(&sc->sc_events_mtx);
2918 mtx_destroy(&sc->sc_queue_mtx);
2919 sx_destroy(&sc->sc_lock);
2920 g_destroy_geom(sc->sc_geom);
2925 G_MIRROR_DEBUG(1, "Device %s created (%u components, id=%u).",
2926 sc->sc_name, sc->sc_ndisks, sc->sc_id);
2928 sc->sc_rootmount = root_mount_hold("GMIRROR");
2929 G_MIRROR_DEBUG(1, "root_mount_hold %p", sc->sc_rootmount);
2933 timeout = g_mirror_timeout * hz;
2934 callout_reset(&sc->sc_callout, timeout, g_mirror_go, sc);
2935 return (sc->sc_geom);
2939 g_mirror_destroy(struct g_mirror_softc *sc, int how)
2941 struct g_mirror_disk *disk;
2942 struct g_provider *pp;
2944 g_topology_assert_not();
2947 sx_assert(&sc->sc_lock, SX_XLOCKED);
2949 pp = sc->sc_provider;
2950 if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) {
2952 case G_MIRROR_DESTROY_SOFT:
2954 "Device %s is still open (r%dw%de%d).", pp->name,
2955 pp->acr, pp->acw, pp->ace);
2957 case G_MIRROR_DESTROY_DELAYED:
2959 "Device %s will be destroyed on last close.",
2961 LIST_FOREACH(disk, &sc->sc_disks, d_next) {
2962 if (disk->d_state ==
2963 G_MIRROR_DISK_STATE_SYNCHRONIZING) {
2964 g_mirror_sync_stop(disk, 1);
2967 sc->sc_flags |= G_MIRROR_DEVICE_FLAG_DESTROYING;
2969 case G_MIRROR_DESTROY_HARD:
2970 G_MIRROR_DEBUG(1, "Device %s is still open, so it "
2971 "can't be definitely removed.", pp->name);
2976 if (sc->sc_geom->softc == NULL) {
2977 g_topology_unlock();
2980 sc->sc_geom->softc = NULL;
2981 sc->sc_sync.ds_geom->softc = NULL;
2982 g_topology_unlock();
2984 sc->sc_flags |= G_MIRROR_DEVICE_FLAG_DESTROY;
2985 sc->sc_flags |= G_MIRROR_DEVICE_FLAG_WAIT;
2986 G_MIRROR_DEBUG(4, "%s: Waking up %p.", __func__, sc);
2987 sx_xunlock(&sc->sc_lock);
2988 mtx_lock(&sc->sc_queue_mtx);
2990 mtx_unlock(&sc->sc_queue_mtx);
2991 G_MIRROR_DEBUG(4, "%s: Sleeping %p.", __func__, &sc->sc_worker);
2992 while (sc->sc_worker != NULL)
2993 tsleep(&sc->sc_worker, PRIBIO, "m:destroy", hz / 5);
2994 G_MIRROR_DEBUG(4, "%s: Woken up %p.", __func__, &sc->sc_worker);
2995 sx_xlock(&sc->sc_lock);
2996 g_mirror_destroy_device(sc);
3002 g_mirror_taste_orphan(struct g_consumer *cp)
3005 KASSERT(1 == 0, ("%s called while tasting %s.", __func__,
3006 cp->provider->name));
3009 static struct g_geom *
3010 g_mirror_taste(struct g_class *mp, struct g_provider *pp, int flags __unused)
3012 struct g_mirror_metadata md;
3013 struct g_mirror_softc *sc;
3014 struct g_consumer *cp;
3018 g_topology_assert();
3019 g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name);
3020 G_MIRROR_DEBUG(2, "Tasting %s.", pp->name);
3022 gp = g_new_geomf(mp, "mirror:taste");
3024 * This orphan function should be never called.
3026 gp->orphan = g_mirror_taste_orphan;
3027 cp = g_new_consumer(gp);
3029 error = g_mirror_read_metadata(cp, &md);
3031 g_destroy_consumer(cp);
3037 if (md.md_provider[0] != '\0' &&
3038 !g_compare_names(md.md_provider, pp->name))
3040 if (md.md_provsize != 0 && md.md_provsize != pp->mediasize)
3042 if ((md.md_dflags & G_MIRROR_DISK_FLAG_INACTIVE) != 0) {
3044 "Device %s: provider %s marked as inactive, skipping.",
3045 md.md_name, pp->name);
3048 if (g_mirror_debug >= 2)
3049 mirror_metadata_dump(&md);
3052 * Let's check if device already exists.
3055 LIST_FOREACH(gp, &mp->geom, geom) {
3059 if (sc->sc_sync.ds_geom == gp)
3061 if (strcmp(md.md_name, sc->sc_name) != 0)
3063 if (md.md_mid != sc->sc_id) {
3064 G_MIRROR_DEBUG(0, "Device %s already configured.",
3071 gp = g_mirror_create(mp, &md);
3073 G_MIRROR_DEBUG(0, "Cannot create device %s.",
3079 G_MIRROR_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name);
3080 g_topology_unlock();
3081 sx_xlock(&sc->sc_lock);
3082 sc->sc_flags |= G_MIRROR_DEVICE_FLAG_TASTING;
3083 error = g_mirror_add_disk(sc, pp, &md);
3085 G_MIRROR_DEBUG(0, "Cannot add disk %s to %s (error=%d).",
3086 pp->name, gp->name, error);
3087 if (LIST_EMPTY(&sc->sc_disks)) {
3089 g_mirror_destroy(sc, G_MIRROR_DESTROY_HARD);
3095 sc->sc_flags &= ~G_MIRROR_DEVICE_FLAG_TASTING;
3096 if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_DESTROY) != 0) {
3097 g_mirror_destroy(sc, G_MIRROR_DESTROY_HARD);
3101 sx_xunlock(&sc->sc_lock);
3107 g_mirror_destroy_geom(struct gctl_req *req __unused,
3108 struct g_class *mp __unused, struct g_geom *gp)
3110 struct g_mirror_softc *sc;
3113 g_topology_unlock();
3115 sx_xlock(&sc->sc_lock);
3117 error = g_mirror_destroy(gp->softc, G_MIRROR_DESTROY_SOFT);
3119 sx_xunlock(&sc->sc_lock);
3125 g_mirror_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp,
3126 struct g_consumer *cp, struct g_provider *pp)
3128 struct g_mirror_softc *sc;
3130 g_topology_assert();
3135 /* Skip synchronization geom. */
3136 if (gp == sc->sc_sync.ds_geom)
3140 } else if (cp != NULL) {
3141 struct g_mirror_disk *disk;
3146 g_topology_unlock();
3147 sx_xlock(&sc->sc_lock);
3148 sbuf_printf(sb, "%s<ID>%u</ID>\n", indent, (u_int)disk->d_id);
3149 if (disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING) {
3150 sbuf_printf(sb, "%s<Synchronized>", indent);
3151 if (disk->d_sync.ds_offset == 0)
3152 sbuf_printf(sb, "0%%");
3154 sbuf_printf(sb, "%u%%",
3155 (u_int)((disk->d_sync.ds_offset * 100) /
3156 sc->sc_provider->mediasize));
3158 sbuf_printf(sb, "</Synchronized>\n");
3159 if (disk->d_sync.ds_offset > 0) {
3160 sbuf_printf(sb, "%s<BytesSynced>%jd"
3161 "</BytesSynced>\n", indent,
3162 (intmax_t)disk->d_sync.ds_offset);
3165 sbuf_printf(sb, "%s<SyncID>%u</SyncID>\n", indent,
3166 disk->d_sync.ds_syncid);
3167 sbuf_printf(sb, "%s<GenID>%u</GenID>\n", indent,
3169 sbuf_printf(sb, "%s<Flags>", indent);
3170 if (disk->d_flags == 0)
3171 sbuf_printf(sb, "NONE");
3175 #define ADD_FLAG(flag, name) do { \
3176 if ((disk->d_flags & (flag)) != 0) { \
3178 sbuf_printf(sb, ", "); \
3181 sbuf_printf(sb, name); \
3184 ADD_FLAG(G_MIRROR_DISK_FLAG_DIRTY, "DIRTY");
3185 ADD_FLAG(G_MIRROR_DISK_FLAG_HARDCODED, "HARDCODED");
3186 ADD_FLAG(G_MIRROR_DISK_FLAG_INACTIVE, "INACTIVE");
3187 ADD_FLAG(G_MIRROR_DISK_FLAG_SYNCHRONIZING,
3189 ADD_FLAG(G_MIRROR_DISK_FLAG_FORCE_SYNC, "FORCE_SYNC");
3190 ADD_FLAG(G_MIRROR_DISK_FLAG_BROKEN, "BROKEN");
3193 sbuf_printf(sb, "</Flags>\n");
3194 sbuf_printf(sb, "%s<Priority>%u</Priority>\n", indent,
3196 sbuf_printf(sb, "%s<State>%s</State>\n", indent,
3197 g_mirror_disk_state2str(disk->d_state));
3198 sx_xunlock(&sc->sc_lock);
3201 g_topology_unlock();
3202 sx_xlock(&sc->sc_lock);
3203 sbuf_printf(sb, "%s<ID>%u</ID>\n", indent, (u_int)sc->sc_id);
3204 sbuf_printf(sb, "%s<SyncID>%u</SyncID>\n", indent, sc->sc_syncid);
3205 sbuf_printf(sb, "%s<GenID>%u</GenID>\n", indent, sc->sc_genid);
3206 sbuf_printf(sb, "%s<Flags>", indent);
3207 if (sc->sc_flags == 0)
3208 sbuf_printf(sb, "NONE");
3212 #define ADD_FLAG(flag, name) do { \
3213 if ((sc->sc_flags & (flag)) != 0) { \
3215 sbuf_printf(sb, ", "); \
3218 sbuf_printf(sb, name); \
3221 ADD_FLAG(G_MIRROR_DEVICE_FLAG_NOFAILSYNC, "NOFAILSYNC");
3222 ADD_FLAG(G_MIRROR_DEVICE_FLAG_NOAUTOSYNC, "NOAUTOSYNC");
3225 sbuf_printf(sb, "</Flags>\n");
3226 sbuf_printf(sb, "%s<Slice>%u</Slice>\n", indent,
3227 (u_int)sc->sc_slice);
3228 sbuf_printf(sb, "%s<Balance>%s</Balance>\n", indent,
3229 balance_name(sc->sc_balance));
3230 sbuf_printf(sb, "%s<Components>%u</Components>\n", indent,
3232 sbuf_printf(sb, "%s<State>", indent);
3233 if (sc->sc_state == G_MIRROR_DEVICE_STATE_STARTING)
3234 sbuf_printf(sb, "%s", "STARTING");
3235 else if (sc->sc_ndisks ==
3236 g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_ACTIVE))
3237 sbuf_printf(sb, "%s", "COMPLETE");
3239 sbuf_printf(sb, "%s", "DEGRADED");
3240 sbuf_printf(sb, "</State>\n");
3241 sx_xunlock(&sc->sc_lock);
3247 g_mirror_shutdown_post_sync(void *arg, int howto)
3250 struct g_geom *gp, *gp2;
3251 struct g_mirror_softc *sc;
3257 g_mirror_shutdown = 1;
3258 LIST_FOREACH_SAFE(gp, &mp->geom, geom, gp2) {
3259 if ((sc = gp->softc) == NULL)
3261 /* Skip synchronization geom. */
3262 if (gp == sc->sc_sync.ds_geom)
3264 g_topology_unlock();
3265 sx_xlock(&sc->sc_lock);
3266 g_mirror_idle(sc, -1);
3268 error = g_mirror_destroy(sc, G_MIRROR_DESTROY_DELAYED);
3270 sx_xunlock(&sc->sc_lock);
3273 g_topology_unlock();
3278 g_mirror_init(struct g_class *mp)
3281 g_mirror_post_sync = EVENTHANDLER_REGISTER(shutdown_post_sync,
3282 g_mirror_shutdown_post_sync, mp, SHUTDOWN_PRI_FIRST);
3283 if (g_mirror_post_sync == NULL)
3284 G_MIRROR_DEBUG(0, "Warning! Cannot register shutdown event.");
3288 g_mirror_fini(struct g_class *mp)
3291 if (g_mirror_post_sync != NULL)
3292 EVENTHANDLER_DEREGISTER(shutdown_post_sync, g_mirror_post_sync);
3295 DECLARE_GEOM_CLASS(g_mirror_class, g_mirror);