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/*- * Copyright (c) 2004, 2007 Lukas Ertl * Copyright (c) 2007, 2009 Ulf Lilleengen * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <sys/cdefs.h> __FBSDID("$FreeBSD: release/9.1.0/sys/geom/vinum/geom_vinum_plex.c 191856 2009-05-06 19:34:32Z lulf $"); #include <sys/param.h> #include <sys/bio.h> #include <sys/lock.h> #include <sys/malloc.h> #include <sys/systm.h> #include <geom/geom.h> #include <geom/vinum/geom_vinum_var.h> #include <geom/vinum/geom_vinum_raid5.h> #include <geom/vinum/geom_vinum.h> static int gv_check_parity(struct gv_plex *, struct bio *, struct gv_raid5_packet *); static int gv_normal_parity(struct gv_plex *, struct bio *, struct gv_raid5_packet *); static void gv_plex_flush(struct gv_plex *); static int gv_plex_offset(struct gv_plex *, off_t, off_t, off_t *, off_t *, int *, int); static int gv_plex_normal_request(struct gv_plex *, struct bio *, off_t, off_t, caddr_t); static void gv_post_bio(struct gv_softc *, struct bio *); void gv_plex_start(struct gv_plex *p, struct bio *bp) { struct bio *cbp; struct gv_sd *s; struct gv_raid5_packet *wp; caddr_t addr; off_t bcount, boff, len; bcount = bp->bio_length; addr = bp->bio_data; boff = bp->bio_offset; /* Walk over the whole length of the request, we might split it up. */ while (bcount > 0) { wp = NULL; /* * RAID5 plexes need special treatment, as a single request * might involve several read/write sub-requests. */ if (p->org == GV_PLEX_RAID5) { wp = gv_raid5_start(p, bp, addr, boff, bcount); if (wp == NULL) return; len = wp->length; if (TAILQ_EMPTY(&wp->bits)) g_free(wp); else if (wp->lockbase != -1) TAILQ_INSERT_TAIL(&p->packets, wp, list); /* * Requests to concatenated and striped plexes go straight * through. */ } else { len = gv_plex_normal_request(p, bp, boff, bcount, addr); } if (len < 0) return; bcount -= len; addr += len; boff += len; } /* * Fire off all sub-requests. We get the correct consumer (== drive) * to send each request to via the subdisk that was stored in * cbp->bio_caller1. */ cbp = bioq_takefirst(p->bqueue); while (cbp != NULL) { /* * RAID5 sub-requests need to come in correct order, otherwise * we trip over the parity, as it might be overwritten by * another sub-request. We abuse cbp->bio_caller2 to mark * potential overlap situations. */ if (cbp->bio_caller2 != NULL && gv_stripe_active(p, cbp)) { /* Park the bio on the waiting queue. */ cbp->bio_pflags |= GV_BIO_ONHOLD; bioq_disksort(p->wqueue, cbp); } else { s = cbp->bio_caller1; g_io_request(cbp, s->drive_sc->consumer); } cbp = bioq_takefirst(p->bqueue); } } static int gv_plex_offset(struct gv_plex *p, off_t boff, off_t bcount, off_t *real_off, off_t *real_len, int *sdno, int growing) { struct gv_sd *s; int i, sdcount; off_t len_left, stripeend, stripeno, stripestart; switch (p->org) { case GV_PLEX_CONCAT: /* * Find the subdisk where this request starts. The subdisks in * this list must be ordered by plex_offset. */ i = 0; LIST_FOREACH(s, &p->subdisks, in_plex) { if (s->plex_offset <= boff && s->plex_offset + s->size > boff) { *sdno = i; break; } i++; } if (s == NULL || s->drive_sc == NULL) return (GV_ERR_NOTFOUND); /* Calculate corresponding offsets on disk. */ *real_off = boff - s->plex_offset; len_left = s->size - (*real_off); KASSERT(len_left >= 0, ("gv_plex_offset: len_left < 0")); *real_len = (bcount > len_left) ? len_left : bcount; break; case GV_PLEX_STRIPED: /* The number of the stripe where the request starts. */ stripeno = boff / p->stripesize; KASSERT(stripeno >= 0, ("gv_plex_offset: stripeno < 0")); /* Take growing subdisks into account when calculating. */ sdcount = gv_sdcount(p, (boff >= p->synced)); if (!(boff + bcount <= p->synced) && (p->flags & GV_PLEX_GROWING) && !growing) return (GV_ERR_ISBUSY); *sdno = stripeno % sdcount; KASSERT(sdno >= 0, ("gv_plex_offset: sdno < 0")); stripestart = (stripeno / sdcount) * p->stripesize; KASSERT(stripestart >= 0, ("gv_plex_offset: stripestart < 0")); stripeend = stripestart + p->stripesize; *real_off = boff - (stripeno * p->stripesize) + stripestart; len_left = stripeend - *real_off; KASSERT(len_left >= 0, ("gv_plex_offset: len_left < 0")); *real_len = (bcount <= len_left) ? bcount : len_left; break; default: return (GV_ERR_PLEXORG); } return (0); } /* * Prepare a normal plex request. */ static int gv_plex_normal_request(struct gv_plex *p, struct bio *bp, off_t boff, off_t bcount, caddr_t addr) { struct gv_sd *s; struct bio *cbp; off_t real_len, real_off; int i, err, sdno; s = NULL; sdno = -1; real_len = real_off = 0; err = ENXIO; if (p == NULL || LIST_EMPTY(&p->subdisks)) goto bad; err = gv_plex_offset(p, boff, bcount, &real_off, &real_len, &sdno, (bp->bio_pflags & GV_BIO_GROW)); /* If the request was blocked, put it into wait. */ if (err == GV_ERR_ISBUSY) { bioq_disksort(p->rqueue, bp); return (-1); /* "Fail", and delay request. */ } if (err) { err = ENXIO; goto bad; } err = ENXIO; /* Find the right subdisk. */ i = 0; LIST_FOREACH(s, &p->subdisks, in_plex) { if (i == sdno) break; i++; } /* Subdisk not found. */ if (s == NULL || s->drive_sc == NULL) goto bad; /* Now check if we can handle the request on this subdisk. */ switch (s->state) { case GV_SD_UP: /* If the subdisk is up, just continue. */ break; case GV_SD_DOWN: if (bp->bio_pflags & GV_BIO_INTERNAL) G_VINUM_DEBUG(0, "subdisk must be in the stale state in" " order to perform administrative requests"); goto bad; case GV_SD_STALE: if (!(bp->bio_pflags & GV_BIO_SYNCREQ)) { G_VINUM_DEBUG(0, "subdisk stale, unable to perform " "regular requests"); goto bad; } G_VINUM_DEBUG(1, "sd %s is initializing", s->name); gv_set_sd_state(s, GV_SD_INITIALIZING, GV_SETSTATE_FORCE); break; case GV_SD_INITIALIZING: if (bp->bio_cmd == BIO_READ) goto bad; break; default: /* All other subdisk states mean it's not accessible. */ goto bad; } /* Clone the bio and adjust the offsets and sizes. */ cbp = g_clone_bio(bp); if (cbp == NULL) { err = ENOMEM; goto bad; } cbp->bio_offset = real_off + s->drive_offset; cbp->bio_length = real_len; cbp->bio_data = addr; cbp->bio_done = gv_done; cbp->bio_caller1 = s; /* Store the sub-requests now and let others issue them. */ bioq_insert_tail(p->bqueue, cbp); return (real_len); bad: G_VINUM_LOGREQ(0, bp, "plex request failed."); /* Building the sub-request failed. If internal BIO, do not deliver. */ if (bp->bio_pflags & GV_BIO_INTERNAL) { if (bp->bio_pflags & GV_BIO_MALLOC) g_free(bp->bio_data); g_destroy_bio(bp); p->flags &= ~(GV_PLEX_SYNCING | GV_PLEX_REBUILDING | GV_PLEX_GROWING); return (-1); } g_io_deliver(bp, err); return (-1); } /* * Handle a completed request to a striped or concatenated plex. */ void gv_plex_normal_done(struct gv_plex *p, struct bio *bp) { struct bio *pbp; pbp = bp->bio_parent; if (pbp->bio_error == 0) pbp->bio_error = bp->bio_error; g_destroy_bio(bp); pbp->bio_inbed++; if (pbp->bio_children == pbp->bio_inbed) { /* Just set it to length since multiple plexes will * screw things up. */ pbp->bio_completed = pbp->bio_length; if (pbp->bio_pflags & GV_BIO_SYNCREQ) gv_sync_complete(p, pbp); else if (pbp->bio_pflags & GV_BIO_GROW) gv_grow_complete(p, pbp); else g_io_deliver(pbp, pbp->bio_error); } } /* * Handle a completed request to a RAID-5 plex. */ void gv_plex_raid5_done(struct gv_plex *p, struct bio *bp) { struct gv_softc *sc; struct bio *cbp, *pbp; struct gv_bioq *bq, *bq2; struct gv_raid5_packet *wp; off_t completed; int i; completed = 0; sc = p->vinumconf; wp = bp->bio_caller2; switch (bp->bio_parent->bio_cmd) { case BIO_READ: if (wp == NULL) { completed = bp->bio_completed; break; } TAILQ_FOREACH_SAFE(bq, &wp->bits, queue, bq2) { if (bq->bp != bp) continue; TAILQ_REMOVE(&wp->bits, bq, queue); g_free(bq); for (i = 0; i < wp->length; i++) wp->data[i] ^= bp->bio_data[i]; break; } if (TAILQ_EMPTY(&wp->bits)) { completed = wp->length; if (wp->lockbase != -1) { TAILQ_REMOVE(&p->packets, wp, list); /* Bring the waiting bios back into the game. */ pbp = bioq_takefirst(p->wqueue); while (pbp != NULL) { gv_post_bio(sc, pbp); pbp = bioq_takefirst(p->wqueue); } } g_free(wp); } break; case BIO_WRITE: /* XXX can this ever happen? */ if (wp == NULL) { completed = bp->bio_completed; break; } /* Check if we need to handle parity data. */ TAILQ_FOREACH_SAFE(bq, &wp->bits, queue, bq2) { if (bq->bp != bp) continue; TAILQ_REMOVE(&wp->bits, bq, queue); g_free(bq); cbp = wp->parity; if (cbp != NULL) { for (i = 0; i < wp->length; i++) cbp->bio_data[i] ^= bp->bio_data[i]; } break; } /* Handle parity data. */ if (TAILQ_EMPTY(&wp->bits)) { if (bp->bio_parent->bio_pflags & GV_BIO_CHECK) i = gv_check_parity(p, bp, wp); else i = gv_normal_parity(p, bp, wp); /* All of our sub-requests have finished. */ if (i) { completed = wp->length; TAILQ_REMOVE(&p->packets, wp, list); /* Bring the waiting bios back into the game. */ pbp = bioq_takefirst(p->wqueue); while (pbp != NULL) { gv_post_bio(sc, pbp); pbp = bioq_takefirst(p->wqueue); } g_free(wp); } } break; } pbp = bp->bio_parent; if (pbp->bio_error == 0) pbp->bio_error = bp->bio_error; pbp->bio_completed += completed; /* When the original request is finished, we deliver it. */ pbp->bio_inbed++; if (pbp->bio_inbed == pbp->bio_children) { /* Hand it over for checking or delivery. */ if (pbp->bio_cmd == BIO_WRITE && (pbp->bio_pflags & GV_BIO_CHECK)) { gv_parity_complete(p, pbp); } else if (pbp->bio_cmd == BIO_WRITE && (pbp->bio_pflags & GV_BIO_REBUILD)) { gv_rebuild_complete(p, pbp); } else if (pbp->bio_pflags & GV_BIO_INIT) { gv_init_complete(p, pbp); } else if (pbp->bio_pflags & GV_BIO_SYNCREQ) { gv_sync_complete(p, pbp); } else if (pbp->bio_pflags & GV_BIO_GROW) { gv_grow_complete(p, pbp); } else { g_io_deliver(pbp, pbp->bio_error); } } /* Clean up what we allocated. */ if (bp->bio_cflags & GV_BIO_MALLOC) g_free(bp->bio_data); g_destroy_bio(bp); } static int gv_check_parity(struct gv_plex *p, struct bio *bp, struct gv_raid5_packet *wp) { struct bio *pbp; struct gv_sd *s; int err, finished, i; err = 0; finished = 1; if (wp->waiting != NULL) { pbp = wp->waiting; wp->waiting = NULL; s = pbp->bio_caller1; g_io_request(pbp, s->drive_sc->consumer); finished = 0; } else if (wp->parity != NULL) { pbp = wp->parity; wp->parity = NULL; /* Check if the parity is correct. */ for (i = 0; i < wp->length; i++) { if (bp->bio_data[i] != pbp->bio_data[i]) { err = 1; break; } } /* The parity is not correct... */ if (err) { bp->bio_parent->bio_error = EAGAIN; /* ... but we rebuild it. */ if (bp->bio_parent->bio_pflags & GV_BIO_PARITY) { s = pbp->bio_caller1; g_io_request(pbp, s->drive_sc->consumer); finished = 0; } } /* * Clean up the BIO we would have used for rebuilding the * parity. */ if (finished) { bp->bio_parent->bio_inbed++; g_destroy_bio(pbp); } } return (finished); } static int gv_normal_parity(struct gv_plex *p, struct bio *bp, struct gv_raid5_packet *wp) { struct bio *cbp, *pbp; struct gv_sd *s; int finished, i; finished = 1; if (wp->waiting != NULL) { pbp = wp->waiting; wp->waiting = NULL; cbp = wp->parity; for (i = 0; i < wp->length; i++) cbp->bio_data[i] ^= pbp->bio_data[i]; s = pbp->bio_caller1; g_io_request(pbp, s->drive_sc->consumer); finished = 0; } else if (wp->parity != NULL) { cbp = wp->parity; wp->parity = NULL; s = cbp->bio_caller1; g_io_request(cbp, s->drive_sc->consumer); finished = 0; } return (finished); } /* Flush the queue with delayed requests. */ static void gv_plex_flush(struct gv_plex *p) { struct gv_softc *sc; struct bio *bp; sc = p->vinumconf; bp = bioq_takefirst(p->rqueue); while (bp != NULL) { gv_plex_start(p, bp); bp = bioq_takefirst(p->rqueue); } } static void gv_post_bio(struct gv_softc *sc, struct bio *bp) { KASSERT(sc != NULL, ("NULL sc")); KASSERT(bp != NULL, ("NULL bp")); mtx_lock(&sc->bqueue_mtx); bioq_disksort(sc->bqueue_down, bp); wakeup(sc); mtx_unlock(&sc->bqueue_mtx); } int gv_sync_request(struct gv_plex *from, struct gv_plex *to, off_t offset, off_t length, int type, caddr_t data) { struct gv_softc *sc; struct bio *bp; KASSERT(from != NULL, ("NULL from")); KASSERT(to != NULL, ("NULL to")); sc = from->vinumconf; KASSERT(sc != NULL, ("NULL sc")); bp = g_new_bio(); if (bp == NULL) { G_VINUM_DEBUG(0, "sync from '%s' failed at offset " " %jd; out of memory", from->name, offset); return (ENOMEM); } bp->bio_length = length; bp->bio_done = gv_done; bp->bio_pflags |= GV_BIO_SYNCREQ; bp->bio_offset = offset; bp->bio_caller1 = from; bp->bio_caller2 = to; bp->bio_cmd = type; if (data == NULL) data = g_malloc(length, M_WAITOK); bp->bio_pflags |= GV_BIO_MALLOC; /* Free on the next run. */ bp->bio_data = data; /* Send down next. */ gv_post_bio(sc, bp); //gv_plex_start(from, bp); return (0); } /* * Handle a finished plex sync bio. */ int gv_sync_complete(struct gv_plex *to, struct bio *bp) { struct gv_plex *from, *p; struct gv_sd *s; struct gv_volume *v; struct gv_softc *sc; off_t offset; int err; g_topology_assert_not(); err = 0; KASSERT(to != NULL, ("NULL to")); KASSERT(bp != NULL, ("NULL bp")); from = bp->bio_caller2; KASSERT(from != NULL, ("NULL from")); v = to->vol_sc; KASSERT(v != NULL, ("NULL v")); sc = v->vinumconf; KASSERT(sc != NULL, ("NULL sc")); /* If it was a read, write it. */ if (bp->bio_cmd == BIO_READ) { err = gv_sync_request(from, to, bp->bio_offset, bp->bio_length, BIO_WRITE, bp->bio_data); /* If it was a write, read the next one. */ } else if (bp->bio_cmd == BIO_WRITE) { if (bp->bio_pflags & GV_BIO_MALLOC) g_free(bp->bio_data); to->synced += bp->bio_length; /* If we're finished, clean up. */ if (bp->bio_offset + bp->bio_length >= from->size) { G_VINUM_DEBUG(1, "syncing of %s from %s completed", to->name, from->name); /* Update our state. */ LIST_FOREACH(s, &to->subdisks, in_plex) gv_set_sd_state(s, GV_SD_UP, 0); gv_update_plex_state(to); to->flags &= ~GV_PLEX_SYNCING; to->synced = 0; gv_post_event(sc, GV_EVENT_SAVE_CONFIG, sc, NULL, 0, 0); } else { offset = bp->bio_offset + bp->bio_length; err = gv_sync_request(from, to, offset, MIN(bp->bio_length, from->size - offset), BIO_READ, NULL); } } g_destroy_bio(bp); /* Clean up if there was an error. */ if (err) { to->flags &= ~GV_PLEX_SYNCING; G_VINUM_DEBUG(0, "error syncing plexes: error code %d", err); } /* Check if all plexes are synced, and lower refcounts. */ g_topology_lock(); LIST_FOREACH(p, &v->plexes, in_volume) { if (p->flags & GV_PLEX_SYNCING) { g_topology_unlock(); return (-1); } } /* If we came here, all plexes are synced, and we're free. */ gv_access(v->provider, -1, -1, 0); g_topology_unlock(); G_VINUM_DEBUG(1, "plex sync completed"); gv_volume_flush(v); return (0); } /* * Create a new bio struct for the next grow request. */ int gv_grow_request(struct gv_plex *p, off_t offset, off_t length, int type, caddr_t data) { struct gv_softc *sc; struct bio *bp; KASSERT(p != NULL, ("gv_grow_request: NULL p")); sc = p->vinumconf; KASSERT(sc != NULL, ("gv_grow_request: NULL sc")); bp = g_new_bio(); if (bp == NULL) { G_VINUM_DEBUG(0, "grow of %s failed creating bio: " "out of memory", p->name); return (ENOMEM); } bp->bio_cmd = type; bp->bio_done = gv_done; bp->bio_error = 0; bp->bio_caller1 = p; bp->bio_offset = offset; bp->bio_length = length; bp->bio_pflags |= GV_BIO_GROW; if (data == NULL) data = g_malloc(length, M_WAITOK); bp->bio_pflags |= GV_BIO_MALLOC; bp->bio_data = data; gv_post_bio(sc, bp); //gv_plex_start(p, bp); return (0); } /* * Finish handling of a bio to a growing plex. */ void gv_grow_complete(struct gv_plex *p, struct bio *bp) { struct gv_softc *sc; struct gv_sd *s; struct gv_volume *v; off_t origsize, offset; int sdcount, err; v = p->vol_sc; KASSERT(v != NULL, ("gv_grow_complete: NULL v")); sc = v->vinumconf; KASSERT(sc != NULL, ("gv_grow_complete: NULL sc")); err = 0; /* If it was a read, write it. */ if (bp->bio_cmd == BIO_READ) { p->synced += bp->bio_length; err = gv_grow_request(p, bp->bio_offset, bp->bio_length, BIO_WRITE, bp->bio_data); /* If it was a write, read next. */ } else if (bp->bio_cmd == BIO_WRITE) { if (bp->bio_pflags & GV_BIO_MALLOC) g_free(bp->bio_data); /* Find the real size of the plex. */ sdcount = gv_sdcount(p, 1); s = LIST_FIRST(&p->subdisks); KASSERT(s != NULL, ("NULL s")); origsize = (s->size * (sdcount - 1)); if (bp->bio_offset + bp->bio_length >= origsize) { G_VINUM_DEBUG(1, "growing of %s completed", p->name); p->flags &= ~GV_PLEX_GROWING; LIST_FOREACH(s, &p->subdisks, in_plex) { s->flags &= ~GV_SD_GROW; gv_set_sd_state(s, GV_SD_UP, 0); } p->size = gv_plex_size(p); gv_update_vol_size(v, gv_vol_size(v)); gv_set_plex_state(p, GV_PLEX_UP, 0); g_topology_lock(); gv_access(v->provider, -1, -1, 0); g_topology_unlock(); p->synced = 0; gv_post_event(sc, GV_EVENT_SAVE_CONFIG, sc, NULL, 0, 0); /* Issue delayed requests. */ gv_plex_flush(p); } else { offset = bp->bio_offset + bp->bio_length; err = gv_grow_request(p, offset, MIN(bp->bio_length, origsize - offset), BIO_READ, NULL); } } g_destroy_bio(bp); if (err) { p->flags &= ~GV_PLEX_GROWING; G_VINUM_DEBUG(0, "error growing plex: error code %d", err); } } /* * Create an initialization BIO and send it off to the consumer. Assume that * we're given initialization data as parameter. */ void gv_init_request(struct gv_sd *s, off_t start, caddr_t data, off_t length) { struct gv_drive *d; struct g_consumer *cp; struct bio *bp, *cbp; KASSERT(s != NULL, ("gv_init_request: NULL s")); d = s->drive_sc; KASSERT(d != NULL, ("gv_init_request: NULL d")); cp = d->consumer; KASSERT(cp != NULL, ("gv_init_request: NULL cp")); bp = g_new_bio(); if (bp == NULL) { G_VINUM_DEBUG(0, "subdisk '%s' init: write failed at offset %jd" " (drive offset %jd); out of memory", s->name, (intmax_t)s->initialized, (intmax_t)start); return; /* XXX: Error codes. */ } bp->bio_cmd = BIO_WRITE; bp->bio_data = data; bp->bio_done = gv_done; bp->bio_error = 0; bp->bio_length = length; bp->bio_pflags |= GV_BIO_INIT; bp->bio_offset = start; bp->bio_caller1 = s; /* Then ofcourse, we have to clone it. */ cbp = g_clone_bio(bp); if (cbp == NULL) { G_VINUM_DEBUG(0, "subdisk '%s' init: write failed at offset %jd" " (drive offset %jd); out of memory", s->name, (intmax_t)s->initialized, (intmax_t)start); return; /* XXX: Error codes. */ } cbp->bio_done = gv_done; cbp->bio_caller1 = s; /* Send it off to the consumer. */ g_io_request(cbp, cp); } /* * Handle a finished initialization BIO. */ void gv_init_complete(struct gv_plex *p, struct bio *bp) { struct gv_softc *sc; struct gv_drive *d; struct g_consumer *cp; struct gv_sd *s; off_t start, length; caddr_t data; int error; s = bp->bio_caller1; start = bp->bio_offset; length = bp->bio_length; error = bp->bio_error; data = bp->bio_data; KASSERT(s != NULL, ("gv_init_complete: NULL s")); d = s->drive_sc; KASSERT(d != NULL, ("gv_init_complete: NULL d")); cp = d->consumer; KASSERT(cp != NULL, ("gv_init_complete: NULL cp")); sc = p->vinumconf; KASSERT(sc != NULL, ("gv_init_complete: NULL sc")); g_destroy_bio(bp); /* * First we need to find out if it was okay, and abort if it's not. * Then we need to free previous buffers, find out the correct subdisk, * as well as getting the correct starting point and length of the BIO. */ if (start >= s->drive_offset + s->size) { /* Free the data we initialized. */ if (data != NULL) g_free(data); g_topology_assert_not(); g_topology_lock(); g_access(cp, 0, -1, 0); g_topology_unlock(); if (error) { gv_set_sd_state(s, GV_SD_STALE, GV_SETSTATE_FORCE | GV_SETSTATE_CONFIG); } else { gv_set_sd_state(s, GV_SD_UP, GV_SETSTATE_CONFIG); s->initialized = 0; gv_post_event(sc, GV_EVENT_SAVE_CONFIG, sc, NULL, 0, 0); G_VINUM_DEBUG(1, "subdisk '%s' init: finished " "successfully", s->name); } return; } s->initialized += length; start += length; gv_init_request(s, start, data, length); } /* * Create a new bio struct for the next parity rebuild. Used both by internal * rebuild of degraded plexes as well as user initiated rebuilds/checks. */ void gv_parity_request(struct gv_plex *p, int flags, off_t offset) { struct gv_softc *sc; struct bio *bp; KASSERT(p != NULL, ("gv_parity_request: NULL p")); sc = p->vinumconf; KASSERT(sc != NULL, ("gv_parity_request: NULL sc")); bp = g_new_bio(); if (bp == NULL) { G_VINUM_DEBUG(0, "rebuild of %s failed creating bio: " "out of memory", p->name); return; } bp->bio_cmd = BIO_WRITE; bp->bio_done = gv_done; bp->bio_error = 0; bp->bio_length = p->stripesize; bp->bio_caller1 = p; /* * Check if it's a rebuild of a degraded plex or a user request of * parity rebuild. */ if (flags & GV_BIO_REBUILD) bp->bio_data = g_malloc(GV_DFLT_SYNCSIZE, M_WAITOK); else if (flags & GV_BIO_CHECK) bp->bio_data = g_malloc(p->stripesize, M_WAITOK | M_ZERO); else { G_VINUM_DEBUG(0, "invalid flags given in rebuild"); return; } bp->bio_pflags = flags; bp->bio_pflags |= GV_BIO_MALLOC; /* We still have more parity to build. */ bp->bio_offset = offset; gv_post_bio(sc, bp); //gv_plex_start(p, bp); /* Send it down to the plex. */ } /* * Handle a finished parity write. */ void gv_parity_complete(struct gv_plex *p, struct bio *bp) { struct gv_softc *sc; int error, flags; error = bp->bio_error; flags = bp->bio_pflags; flags &= ~GV_BIO_MALLOC; sc = p->vinumconf; KASSERT(sc != NULL, ("gv_parity_complete: NULL sc")); /* Clean up what we allocated. */ if (bp->bio_pflags & GV_BIO_MALLOC) g_free(bp->bio_data); g_destroy_bio(bp); if (error == EAGAIN) { G_VINUM_DEBUG(0, "parity incorrect at offset 0x%jx", (intmax_t)p->synced); } /* Any error is fatal, except EAGAIN when we're rebuilding. */ if (error && !(error == EAGAIN && (flags & GV_BIO_PARITY))) { /* Make sure we don't have the lock. */ g_topology_assert_not(); g_topology_lock(); gv_access(p->vol_sc->provider, -1, -1, 0); g_topology_unlock(); G_VINUM_DEBUG(0, "parity check on %s failed at 0x%jx " "errno %d", p->name, (intmax_t)p->synced, error); return; } else { p->synced += p->stripesize; } if (p->synced >= p->size) { /* Make sure we don't have the lock. */ g_topology_assert_not(); g_topology_lock(); gv_access(p->vol_sc->provider, -1, -1, 0); g_topology_unlock(); /* We're finished. */ G_VINUM_DEBUG(1, "parity operation on %s finished", p->name); p->synced = 0; gv_post_event(sc, GV_EVENT_SAVE_CONFIG, sc, NULL, 0, 0); return; } /* Send down next. It will determine if we need to itself. */ gv_parity_request(p, flags, p->synced); } /* * Handle a finished plex rebuild bio. */ void gv_rebuild_complete(struct gv_plex *p, struct bio *bp) { struct gv_softc *sc; struct gv_sd *s; int error, flags; off_t offset; error = bp->bio_error; flags = bp->bio_pflags; offset = bp->bio_offset; flags &= ~GV_BIO_MALLOC; sc = p->vinumconf; KASSERT(sc != NULL, ("gv_rebuild_complete: NULL sc")); /* Clean up what we allocated. */ if (bp->bio_pflags & GV_BIO_MALLOC) g_free(bp->bio_data); g_destroy_bio(bp); if (error) { g_topology_assert_not(); g_topology_lock(); gv_access(p->vol_sc->provider, -1, -1, 0); g_topology_unlock(); G_VINUM_DEBUG(0, "rebuild of %s failed at offset %jd errno: %d", p->name, (intmax_t)offset, error); p->flags &= ~GV_PLEX_REBUILDING; p->synced = 0; gv_plex_flush(p); /* Flush out remaining rebuild BIOs. */ return; } offset += (p->stripesize * (gv_sdcount(p, 1) - 1)); if (offset >= p->size) { /* We're finished. */ g_topology_assert_not(); g_topology_lock(); gv_access(p->vol_sc->provider, -1, -1, 0); g_topology_unlock(); G_VINUM_DEBUG(1, "rebuild of %s finished", p->name); gv_save_config(p->vinumconf); p->flags &= ~GV_PLEX_REBUILDING; p->synced = 0; /* Try to up all subdisks. */ LIST_FOREACH(s, &p->subdisks, in_plex) gv_update_sd_state(s); gv_post_event(sc, GV_EVENT_SAVE_CONFIG, sc, NULL, 0, 0); gv_plex_flush(p); /* Flush out remaining rebuild BIOs. */ return; } /* Send down next. It will determine if we need to itself. */ gv_parity_request(p, flags, offset); }