| Current Path : /sys/amd64/compile/hs32/modules/usr/src/sys/modules/dtrace/dtrace_test/@/geom/raid/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/amd64/compile/hs32/modules/usr/src/sys/modules/dtrace/dtrace_test/@/geom/raid/tr_raid0.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: release/9.1.0/sys/geom/raid/tr_raid0.c 240558 2012-09-16 11:02:22Z mav $");
#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;
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");