a43d540d9e
If at least one subdisk in the volume supports it, BIO_DELETE requests will be propagated down. Unfortunatelly, for RAID levels with redundancy unmapped blocks will be mapped back during first rebuild/resync process. Sponsored by: iXsystems, Inc. MFC after: 1 month
329 lines
8.9 KiB
C
329 lines
8.9 KiB
C
/*-
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* Copyright (c) 2010 Alexander Motin <mav@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/bio.h>
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#include <sys/endian.h>
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#include <sys/kernel.h>
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#include <sys/kobj.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mutex.h>
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#include <sys/systm.h>
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#include <geom/geom.h>
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#include "geom/raid/g_raid.h"
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#include "g_raid_tr_if.h"
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static MALLOC_DEFINE(M_TR_RAID0, "tr_raid0_data", "GEOM_RAID RAID0 data");
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struct g_raid_tr_raid0_object {
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struct g_raid_tr_object trso_base;
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int trso_starting;
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int trso_stopped;
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};
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static g_raid_tr_taste_t g_raid_tr_taste_raid0;
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static g_raid_tr_event_t g_raid_tr_event_raid0;
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static g_raid_tr_start_t g_raid_tr_start_raid0;
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static g_raid_tr_stop_t g_raid_tr_stop_raid0;
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static g_raid_tr_iostart_t g_raid_tr_iostart_raid0;
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static g_raid_tr_iodone_t g_raid_tr_iodone_raid0;
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static g_raid_tr_kerneldump_t g_raid_tr_kerneldump_raid0;
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static g_raid_tr_free_t g_raid_tr_free_raid0;
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static kobj_method_t g_raid_tr_raid0_methods[] = {
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KOBJMETHOD(g_raid_tr_taste, g_raid_tr_taste_raid0),
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KOBJMETHOD(g_raid_tr_event, g_raid_tr_event_raid0),
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KOBJMETHOD(g_raid_tr_start, g_raid_tr_start_raid0),
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KOBJMETHOD(g_raid_tr_stop, g_raid_tr_stop_raid0),
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KOBJMETHOD(g_raid_tr_iostart, g_raid_tr_iostart_raid0),
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KOBJMETHOD(g_raid_tr_iodone, g_raid_tr_iodone_raid0),
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KOBJMETHOD(g_raid_tr_kerneldump, g_raid_tr_kerneldump_raid0),
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KOBJMETHOD(g_raid_tr_free, g_raid_tr_free_raid0),
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{ 0, 0 }
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};
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static struct g_raid_tr_class g_raid_tr_raid0_class = {
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"RAID0",
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g_raid_tr_raid0_methods,
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sizeof(struct g_raid_tr_raid0_object),
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.trc_enable = 1,
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.trc_priority = 100
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};
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static int
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g_raid_tr_taste_raid0(struct g_raid_tr_object *tr, struct g_raid_volume *volume)
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{
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struct g_raid_tr_raid0_object *trs;
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trs = (struct g_raid_tr_raid0_object *)tr;
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if (tr->tro_volume->v_raid_level != G_RAID_VOLUME_RL_RAID0 ||
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tr->tro_volume->v_raid_level_qualifier != G_RAID_VOLUME_RLQ_NONE)
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return (G_RAID_TR_TASTE_FAIL);
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trs->trso_starting = 1;
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return (G_RAID_TR_TASTE_SUCCEED);
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}
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static int
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g_raid_tr_update_state_raid0(struct g_raid_volume *vol)
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{
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struct g_raid_tr_raid0_object *trs;
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struct g_raid_softc *sc;
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u_int s;
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int n, f;
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sc = vol->v_softc;
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trs = (struct g_raid_tr_raid0_object *)vol->v_tr;
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if (trs->trso_stopped)
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s = G_RAID_VOLUME_S_STOPPED;
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else if (trs->trso_starting)
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s = G_RAID_VOLUME_S_STARTING;
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else {
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n = g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_ACTIVE);
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f = g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_FAILED);
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if (n + f == vol->v_disks_count) {
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if (f == 0)
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s = G_RAID_VOLUME_S_OPTIMAL;
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else
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s = G_RAID_VOLUME_S_SUBOPTIMAL;
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} else
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s = G_RAID_VOLUME_S_BROKEN;
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}
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if (s != vol->v_state) {
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g_raid_event_send(vol, G_RAID_VOLUME_S_ALIVE(s) ?
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G_RAID_VOLUME_E_UP : G_RAID_VOLUME_E_DOWN,
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G_RAID_EVENT_VOLUME);
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g_raid_change_volume_state(vol, s);
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if (!trs->trso_starting && !trs->trso_stopped)
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g_raid_write_metadata(sc, vol, NULL, NULL);
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}
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return (0);
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}
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static int
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g_raid_tr_event_raid0(struct g_raid_tr_object *tr,
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struct g_raid_subdisk *sd, u_int event)
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{
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struct g_raid_tr_raid0_object *trs;
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struct g_raid_softc *sc;
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struct g_raid_volume *vol;
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int state;
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trs = (struct g_raid_tr_raid0_object *)tr;
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vol = tr->tro_volume;
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sc = vol->v_softc;
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state = sd->sd_state;
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if (state != G_RAID_SUBDISK_S_NONE &&
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state != G_RAID_SUBDISK_S_FAILED &&
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state != G_RAID_SUBDISK_S_ACTIVE) {
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G_RAID_DEBUG1(1, sc,
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"Promote subdisk %s:%d from %s to ACTIVE.",
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vol->v_name, sd->sd_pos,
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g_raid_subdisk_state2str(sd->sd_state));
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g_raid_change_subdisk_state(sd, G_RAID_SUBDISK_S_ACTIVE);
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}
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if (state != sd->sd_state &&
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!trs->trso_starting && !trs->trso_stopped)
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g_raid_write_metadata(sc, vol, sd, NULL);
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g_raid_tr_update_state_raid0(vol);
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return (0);
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}
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static int
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g_raid_tr_start_raid0(struct g_raid_tr_object *tr)
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{
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struct g_raid_tr_raid0_object *trs;
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struct g_raid_volume *vol;
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trs = (struct g_raid_tr_raid0_object *)tr;
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vol = tr->tro_volume;
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trs->trso_starting = 0;
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g_raid_tr_update_state_raid0(vol);
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return (0);
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}
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static int
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g_raid_tr_stop_raid0(struct g_raid_tr_object *tr)
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{
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struct g_raid_tr_raid0_object *trs;
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struct g_raid_volume *vol;
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trs = (struct g_raid_tr_raid0_object *)tr;
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vol = tr->tro_volume;
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trs->trso_starting = 0;
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trs->trso_stopped = 1;
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g_raid_tr_update_state_raid0(vol);
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return (0);
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}
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static void
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g_raid_tr_iostart_raid0(struct g_raid_tr_object *tr, struct bio *bp)
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{
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struct g_raid_volume *vol;
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struct g_raid_subdisk *sd;
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struct bio_queue_head queue;
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struct bio *cbp;
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char *addr;
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off_t offset, start, length, nstripe, remain;
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u_int no, strip_size;
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vol = tr->tro_volume;
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if (vol->v_state != G_RAID_VOLUME_S_OPTIMAL &&
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vol->v_state != G_RAID_VOLUME_S_SUBOPTIMAL) {
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g_raid_iodone(bp, EIO);
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return;
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}
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if (bp->bio_cmd == BIO_FLUSH) {
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g_raid_tr_flush_common(tr, bp);
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return;
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}
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addr = bp->bio_data;
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strip_size = vol->v_strip_size;
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/* Stripe number. */
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nstripe = bp->bio_offset / strip_size;
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/* Start position in stripe. */
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start = bp->bio_offset % strip_size;
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/* Disk number. */
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no = nstripe % vol->v_disks_count;
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/* Stripe start position in disk. */
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offset = (nstripe / vol->v_disks_count) * strip_size;
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/* Length of data to operate. */
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remain = bp->bio_length;
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bioq_init(&queue);
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do {
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length = MIN(strip_size - start, remain);
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cbp = g_clone_bio(bp);
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if (cbp == NULL)
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goto failure;
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cbp->bio_offset = offset + start;
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cbp->bio_data = addr;
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cbp->bio_length = length;
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cbp->bio_caller1 = &vol->v_subdisks[no];
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bioq_insert_tail(&queue, cbp);
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if (++no >= vol->v_disks_count) {
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no = 0;
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offset += strip_size;
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}
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remain -= length;
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if (bp->bio_cmd != BIO_DELETE)
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addr += length;
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start = 0;
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} while (remain > 0);
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for (cbp = bioq_first(&queue); cbp != NULL;
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cbp = bioq_first(&queue)) {
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bioq_remove(&queue, cbp);
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sd = cbp->bio_caller1;
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cbp->bio_caller1 = NULL;
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g_raid_subdisk_iostart(sd, cbp);
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}
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return;
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failure:
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for (cbp = bioq_first(&queue); cbp != NULL;
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cbp = bioq_first(&queue)) {
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bioq_remove(&queue, cbp);
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g_destroy_bio(cbp);
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}
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if (bp->bio_error == 0)
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bp->bio_error = ENOMEM;
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g_raid_iodone(bp, bp->bio_error);
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}
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static int
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g_raid_tr_kerneldump_raid0(struct g_raid_tr_object *tr,
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void *virtual, vm_offset_t physical, off_t boffset, size_t blength)
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{
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struct g_raid_volume *vol;
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char *addr;
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off_t offset, start, length, nstripe, remain;
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u_int no, strip_size;
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int error;
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vol = tr->tro_volume;
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if (vol->v_state != G_RAID_VOLUME_S_OPTIMAL)
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return (ENXIO);
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addr = virtual;
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strip_size = vol->v_strip_size;
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/* Stripe number. */
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nstripe = boffset / strip_size;
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/* Start position in stripe. */
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start = boffset % strip_size;
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/* Disk number. */
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no = nstripe % vol->v_disks_count;
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/* Stripe tart position in disk. */
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offset = (nstripe / vol->v_disks_count) * strip_size;
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/* Length of data to operate. */
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remain = blength;
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do {
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length = MIN(strip_size - start, remain);
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error = g_raid_subdisk_kerneldump(&vol->v_subdisks[no],
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addr, 0, offset + start, length);
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if (error != 0)
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return (error);
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if (++no >= vol->v_disks_count) {
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no = 0;
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offset += strip_size;
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}
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remain -= length;
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addr += length;
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start = 0;
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} while (remain > 0);
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return (0);
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}
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static void
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g_raid_tr_iodone_raid0(struct g_raid_tr_object *tr,
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struct g_raid_subdisk *sd,struct bio *bp)
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{
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struct bio *pbp;
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pbp = bp->bio_parent;
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if (pbp->bio_error == 0)
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pbp->bio_error = bp->bio_error;
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g_destroy_bio(bp);
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pbp->bio_inbed++;
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if (pbp->bio_children == pbp->bio_inbed) {
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pbp->bio_completed = pbp->bio_length;
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g_raid_iodone(pbp, bp->bio_error);
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}
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}
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static int
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g_raid_tr_free_raid0(struct g_raid_tr_object *tr)
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{
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return (0);
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}
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G_RAID_TR_DECLARE(raid0, "RAID0");
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