609a74746a
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
/*-
|
|
* Copyright (c) 2010 Alexander Motin <mav@FreeBSD.org>
|
|
* 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 AUTHORS 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 AUTHORS 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("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/bio.h>
|
|
#include <sys/endian.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/kobj.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/systm.h>
|
|
#include <geom/geom.h>
|
|
#include "geom/raid/g_raid.h"
|
|
#include "g_raid_tr_if.h"
|
|
|
|
static MALLOC_DEFINE(M_TR_RAID0, "tr_raid0_data", "GEOM_RAID RAID0 data");
|
|
|
|
struct g_raid_tr_raid0_object {
|
|
struct g_raid_tr_object trso_base;
|
|
int trso_starting;
|
|
int trso_stopped;
|
|
};
|
|
|
|
static g_raid_tr_taste_t g_raid_tr_taste_raid0;
|
|
static g_raid_tr_event_t g_raid_tr_event_raid0;
|
|
static g_raid_tr_start_t g_raid_tr_start_raid0;
|
|
static g_raid_tr_stop_t g_raid_tr_stop_raid0;
|
|
static g_raid_tr_iostart_t g_raid_tr_iostart_raid0;
|
|
static g_raid_tr_iodone_t g_raid_tr_iodone_raid0;
|
|
static g_raid_tr_kerneldump_t g_raid_tr_kerneldump_raid0;
|
|
static g_raid_tr_free_t g_raid_tr_free_raid0;
|
|
|
|
static kobj_method_t g_raid_tr_raid0_methods[] = {
|
|
KOBJMETHOD(g_raid_tr_taste, g_raid_tr_taste_raid0),
|
|
KOBJMETHOD(g_raid_tr_event, g_raid_tr_event_raid0),
|
|
KOBJMETHOD(g_raid_tr_start, g_raid_tr_start_raid0),
|
|
KOBJMETHOD(g_raid_tr_stop, g_raid_tr_stop_raid0),
|
|
KOBJMETHOD(g_raid_tr_iostart, g_raid_tr_iostart_raid0),
|
|
KOBJMETHOD(g_raid_tr_iodone, g_raid_tr_iodone_raid0),
|
|
KOBJMETHOD(g_raid_tr_kerneldump, g_raid_tr_kerneldump_raid0),
|
|
KOBJMETHOD(g_raid_tr_free, g_raid_tr_free_raid0),
|
|
{ 0, 0 }
|
|
};
|
|
|
|
static struct g_raid_tr_class g_raid_tr_raid0_class = {
|
|
"RAID0",
|
|
g_raid_tr_raid0_methods,
|
|
sizeof(struct g_raid_tr_raid0_object),
|
|
.trc_enable = 1,
|
|
.trc_priority = 100
|
|
};
|
|
|
|
static int
|
|
g_raid_tr_taste_raid0(struct g_raid_tr_object *tr, struct g_raid_volume *volume)
|
|
{
|
|
struct g_raid_tr_raid0_object *trs;
|
|
|
|
trs = (struct g_raid_tr_raid0_object *)tr;
|
|
if (tr->tro_volume->v_raid_level != G_RAID_VOLUME_RL_RAID0 ||
|
|
tr->tro_volume->v_raid_level_qualifier != G_RAID_VOLUME_RLQ_NONE)
|
|
return (G_RAID_TR_TASTE_FAIL);
|
|
trs->trso_starting = 1;
|
|
return (G_RAID_TR_TASTE_SUCCEED);
|
|
}
|
|
|
|
static int
|
|
g_raid_tr_update_state_raid0(struct g_raid_volume *vol)
|
|
{
|
|
struct g_raid_tr_raid0_object *trs;
|
|
struct g_raid_softc *sc;
|
|
u_int s;
|
|
int n, f;
|
|
|
|
sc = vol->v_softc;
|
|
trs = (struct g_raid_tr_raid0_object *)vol->v_tr;
|
|
if (trs->trso_stopped)
|
|
s = G_RAID_VOLUME_S_STOPPED;
|
|
else if (trs->trso_starting)
|
|
s = G_RAID_VOLUME_S_STARTING;
|
|
else {
|
|
n = g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_ACTIVE);
|
|
f = g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_FAILED);
|
|
if (n + f == vol->v_disks_count) {
|
|
if (f == 0)
|
|
s = G_RAID_VOLUME_S_OPTIMAL;
|
|
else
|
|
s = G_RAID_VOLUME_S_SUBOPTIMAL;
|
|
} else
|
|
s = G_RAID_VOLUME_S_BROKEN;
|
|
}
|
|
if (s != vol->v_state) {
|
|
g_raid_event_send(vol, G_RAID_VOLUME_S_ALIVE(s) ?
|
|
G_RAID_VOLUME_E_UP : G_RAID_VOLUME_E_DOWN,
|
|
G_RAID_EVENT_VOLUME);
|
|
g_raid_change_volume_state(vol, s);
|
|
if (!trs->trso_starting && !trs->trso_stopped)
|
|
g_raid_write_metadata(sc, vol, NULL, NULL);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
g_raid_tr_event_raid0(struct g_raid_tr_object *tr,
|
|
struct g_raid_subdisk *sd, u_int event)
|
|
{
|
|
struct g_raid_tr_raid0_object *trs;
|
|
struct g_raid_softc *sc;
|
|
struct g_raid_volume *vol;
|
|
int state;
|
|
|
|
trs = (struct g_raid_tr_raid0_object *)tr;
|
|
vol = tr->tro_volume;
|
|
sc = vol->v_softc;
|
|
|
|
state = sd->sd_state;
|
|
if (state != G_RAID_SUBDISK_S_NONE &&
|
|
state != G_RAID_SUBDISK_S_FAILED &&
|
|
state != G_RAID_SUBDISK_S_ACTIVE) {
|
|
G_RAID_DEBUG1(1, sc,
|
|
"Promote subdisk %s:%d from %s to ACTIVE.",
|
|
vol->v_name, sd->sd_pos,
|
|
g_raid_subdisk_state2str(sd->sd_state));
|
|
g_raid_change_subdisk_state(sd, G_RAID_SUBDISK_S_ACTIVE);
|
|
}
|
|
if (state != sd->sd_state &&
|
|
!trs->trso_starting && !trs->trso_stopped)
|
|
g_raid_write_metadata(sc, vol, sd, NULL);
|
|
g_raid_tr_update_state_raid0(vol);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
g_raid_tr_start_raid0(struct g_raid_tr_object *tr)
|
|
{
|
|
struct g_raid_tr_raid0_object *trs;
|
|
struct g_raid_volume *vol;
|
|
|
|
trs = (struct g_raid_tr_raid0_object *)tr;
|
|
vol = tr->tro_volume;
|
|
trs->trso_starting = 0;
|
|
g_raid_tr_update_state_raid0(vol);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
g_raid_tr_stop_raid0(struct g_raid_tr_object *tr)
|
|
{
|
|
struct g_raid_tr_raid0_object *trs;
|
|
struct g_raid_volume *vol;
|
|
|
|
trs = (struct g_raid_tr_raid0_object *)tr;
|
|
vol = tr->tro_volume;
|
|
trs->trso_starting = 0;
|
|
trs->trso_stopped = 1;
|
|
g_raid_tr_update_state_raid0(vol);
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
g_raid_tr_iostart_raid0(struct g_raid_tr_object *tr, struct bio *bp)
|
|
{
|
|
struct g_raid_volume *vol;
|
|
struct g_raid_subdisk *sd;
|
|
struct bio_queue_head queue;
|
|
struct bio *cbp;
|
|
char *addr;
|
|
off_t offset, start, length, nstripe, remain;
|
|
u_int no, strip_size;
|
|
|
|
vol = tr->tro_volume;
|
|
if (vol->v_state != G_RAID_VOLUME_S_OPTIMAL &&
|
|
vol->v_state != G_RAID_VOLUME_S_SUBOPTIMAL) {
|
|
g_raid_iodone(bp, EIO);
|
|
return;
|
|
}
|
|
if (bp->bio_cmd == BIO_FLUSH) {
|
|
g_raid_tr_flush_common(tr, bp);
|
|
return;
|
|
}
|
|
addr = bp->bio_data;
|
|
strip_size = vol->v_strip_size;
|
|
|
|
/* Stripe number. */
|
|
nstripe = bp->bio_offset / strip_size;
|
|
/* Start position in stripe. */
|
|
start = bp->bio_offset % strip_size;
|
|
/* Disk number. */
|
|
no = nstripe % vol->v_disks_count;
|
|
/* Stripe start position in disk. */
|
|
offset = (nstripe / vol->v_disks_count) * strip_size;
|
|
/* Length of data to operate. */
|
|
remain = bp->bio_length;
|
|
|
|
bioq_init(&queue);
|
|
do {
|
|
length = MIN(strip_size - start, remain);
|
|
cbp = g_clone_bio(bp);
|
|
if (cbp == NULL)
|
|
goto failure;
|
|
cbp->bio_offset = offset + start;
|
|
cbp->bio_data = addr;
|
|
cbp->bio_length = length;
|
|
cbp->bio_caller1 = &vol->v_subdisks[no];
|
|
bioq_insert_tail(&queue, cbp);
|
|
if (++no >= vol->v_disks_count) {
|
|
no = 0;
|
|
offset += strip_size;
|
|
}
|
|
remain -= length;
|
|
if (bp->bio_cmd != BIO_DELETE)
|
|
addr += length;
|
|
start = 0;
|
|
} while (remain > 0);
|
|
for (cbp = bioq_first(&queue); cbp != NULL;
|
|
cbp = bioq_first(&queue)) {
|
|
bioq_remove(&queue, cbp);
|
|
sd = cbp->bio_caller1;
|
|
cbp->bio_caller1 = NULL;
|
|
g_raid_subdisk_iostart(sd, cbp);
|
|
}
|
|
return;
|
|
failure:
|
|
for (cbp = bioq_first(&queue); cbp != NULL;
|
|
cbp = bioq_first(&queue)) {
|
|
bioq_remove(&queue, cbp);
|
|
g_destroy_bio(cbp);
|
|
}
|
|
if (bp->bio_error == 0)
|
|
bp->bio_error = ENOMEM;
|
|
g_raid_iodone(bp, bp->bio_error);
|
|
}
|
|
|
|
static int
|
|
g_raid_tr_kerneldump_raid0(struct g_raid_tr_object *tr,
|
|
void *virtual, vm_offset_t physical, off_t boffset, size_t blength)
|
|
{
|
|
struct g_raid_volume *vol;
|
|
char *addr;
|
|
off_t offset, start, length, nstripe, remain;
|
|
u_int no, strip_size;
|
|
int error;
|
|
|
|
vol = tr->tro_volume;
|
|
if (vol->v_state != G_RAID_VOLUME_S_OPTIMAL)
|
|
return (ENXIO);
|
|
addr = virtual;
|
|
strip_size = vol->v_strip_size;
|
|
|
|
/* Stripe number. */
|
|
nstripe = boffset / strip_size;
|
|
/* Start position in stripe. */
|
|
start = boffset % strip_size;
|
|
/* Disk number. */
|
|
no = nstripe % vol->v_disks_count;
|
|
/* Stripe tart position in disk. */
|
|
offset = (nstripe / vol->v_disks_count) * strip_size;
|
|
/* Length of data to operate. */
|
|
remain = blength;
|
|
|
|
do {
|
|
length = MIN(strip_size - start, remain);
|
|
error = g_raid_subdisk_kerneldump(&vol->v_subdisks[no],
|
|
addr, 0, offset + start, length);
|
|
if (error != 0)
|
|
return (error);
|
|
if (++no >= vol->v_disks_count) {
|
|
no = 0;
|
|
offset += strip_size;
|
|
}
|
|
remain -= length;
|
|
addr += length;
|
|
start = 0;
|
|
} while (remain > 0);
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
g_raid_tr_iodone_raid0(struct g_raid_tr_object *tr,
|
|
struct g_raid_subdisk *sd,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) {
|
|
pbp->bio_completed = pbp->bio_length;
|
|
g_raid_iodone(pbp, bp->bio_error);
|
|
}
|
|
}
|
|
|
|
static int
|
|
g_raid_tr_free_raid0(struct g_raid_tr_object *tr)
|
|
{
|
|
|
|
return (0);
|
|
}
|
|
|
|
G_RAID_TR_DECLARE(raid0, "RAID0");
|