diff --git a/sys/geom/multipath/g_multipath.c b/sys/geom/multipath/g_multipath.c
index f5fe539a879c..7a8c88ab61fc 100644
--- a/sys/geom/multipath/g_multipath.c
+++ b/sys/geom/multipath/g_multipath.c
@@ -1,1560 +1,1566 @@
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2011-2013 Alexander Motin <mav@FreeBSD.org>
* Copyright (c) 2006-2007 Matthew Jacob <mjacob@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.
*/
/*
* Based upon work by Pawel Jakub Dawidek <pjd@FreeBSD.org> for all of the
* fine geom examples, and by Poul Henning Kamp <phk@FreeBSD.org> for GEOM
* itself, all of which is most gratefully acknowledged.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/limits.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/bio.h>
#include <sys/sbuf.h>
#include <sys/sdt.h>
#include <sys/sysctl.h>
#include <sys/kthread.h>
#include <sys/malloc.h>
#include <geom/geom.h>
#include <geom/multipath/g_multipath.h>
FEATURE(geom_multipath, "GEOM multipath support");
SYSCTL_DECL(_kern_geom);
static SYSCTL_NODE(_kern_geom, OID_AUTO, multipath, CTLFLAG_RW, 0,
"GEOM_MULTIPATH tunables");
static u_int g_multipath_debug = 0;
SYSCTL_UINT(_kern_geom_multipath, OID_AUTO, debug, CTLFLAG_RW,
&g_multipath_debug, 0, "Debug level");
static u_int g_multipath_exclusive = 1;
SYSCTL_UINT(_kern_geom_multipath, OID_AUTO, exclusive, CTLFLAG_RW,
&g_multipath_exclusive, 0, "Exclusively open providers");
SDT_PROVIDER_DECLARE(geom);
SDT_PROBE_DEFINE2(geom, multipath, config, restore, "char*", "char*");
SDT_PROBE_DEFINE2(geom, multipath, config, remove, "char*", "char*");
SDT_PROBE_DEFINE2(geom, multipath, config, disconnect, "char*", "char*");
SDT_PROBE_DEFINE3(geom, multipath, config, fail, "char*", "char*", "int");
SDT_PROBE_DEFINE2(geom, multipath, config, taste, "char*", "char*");
SDT_PROBE_DEFINE2(geom, multipath, io, restart, "struct bio*", "struct bio*");
static enum {
GKT_NIL,
GKT_RUN,
GKT_DIE
} g_multipath_kt_state;
static struct bio_queue_head gmtbq;
static struct mtx gmtbq_mtx;
static int g_multipath_read_metadata(struct g_consumer *cp,
struct g_multipath_metadata *md);
static int g_multipath_write_metadata(struct g_consumer *cp,
struct g_multipath_metadata *md);
static void g_multipath_orphan(struct g_consumer *);
static void g_multipath_resize(struct g_consumer *);
static void g_multipath_start(struct bio *);
static void g_multipath_done(struct bio *);
static void g_multipath_done_error(struct bio *);
static void g_multipath_kt(void *);
static int g_multipath_destroy(struct g_geom *);
static int
g_multipath_destroy_geom(struct gctl_req *, struct g_class *, struct g_geom *);
static struct g_geom *g_multipath_find_geom(struct g_class *, const char *);
static int g_multipath_rotate(struct g_geom *);
static g_taste_t g_multipath_taste;
static g_ctl_req_t g_multipath_config;
static g_init_t g_multipath_init;
static g_fini_t g_multipath_fini;
static g_dumpconf_t g_multipath_dumpconf;
struct g_class g_multipath_class = {
.name = G_MULTIPATH_CLASS_NAME,
.version = G_VERSION,
.ctlreq = g_multipath_config,
.taste = g_multipath_taste,
.destroy_geom = g_multipath_destroy_geom,
.init = g_multipath_init,
.fini = g_multipath_fini
};
#define MP_FAIL 0x00000001
#define MP_LOST 0x00000002
#define MP_NEW 0x00000004
#define MP_POSTED 0x00000008
#define MP_BAD (MP_FAIL | MP_LOST | MP_NEW)
#define MP_WITHER 0x00000010
#define MP_IDLE 0x00000020
#define MP_IDLE_MASK 0xffffffe0
static int
g_multipath_good(struct g_geom *gp)
{
struct g_consumer *cp;
int n = 0;
LIST_FOREACH(cp, &gp->consumer, consumer) {
if ((cp->index & MP_BAD) == 0)
n++;
}
return (n);
}
static void
g_multipath_fault(struct g_consumer *cp, int cause)
{
struct g_multipath_softc *sc;
struct g_consumer *lcp;
struct g_geom *gp;
gp = cp->geom;
sc = gp->softc;
cp->index |= cause;
if (g_multipath_good(gp) == 0 && sc->sc_ndisks > 0) {
LIST_FOREACH(lcp, &gp->consumer, consumer) {
if (lcp->provider == NULL ||
(lcp->index & (MP_LOST | MP_NEW)))
continue;
if (sc->sc_ndisks > 1 && lcp == cp)
continue;
printf("GEOM_MULTIPATH: "
"all paths in %s were marked FAIL, restore %s\n",
sc->sc_name, lcp->provider->name);
SDT_PROBE2(geom, multipath, config, restore,
sc->sc_name, lcp->provider->name);
lcp->index &= ~MP_FAIL;
}
}
if (cp != sc->sc_active)
return;
sc->sc_active = NULL;
LIST_FOREACH(lcp, &gp->consumer, consumer) {
if ((lcp->index & MP_BAD) == 0) {
sc->sc_active = lcp;
break;
}
}
if (sc->sc_active == NULL) {
printf("GEOM_MULTIPATH: out of providers for %s\n",
sc->sc_name);
} else if (sc->sc_active_active != 1) {
printf("GEOM_MULTIPATH: %s is now active path in %s\n",
sc->sc_active->provider->name, sc->sc_name);
}
}
static struct g_consumer *
g_multipath_choose(struct g_geom *gp, struct bio *bp)
{
struct g_multipath_softc *sc;
struct g_consumer *best, *cp;
sc = gp->softc;
if (sc->sc_active_active == 0 ||
(sc->sc_active_active == 2 && bp->bio_cmd != BIO_READ))
return (sc->sc_active);
best = NULL;
LIST_FOREACH(cp, &gp->consumer, consumer) {
if (cp->index & MP_BAD)
continue;
cp->index += MP_IDLE;
if (best == NULL || cp->private < best->private ||
(cp->private == best->private && cp->index > best->index))
best = cp;
}
if (best != NULL)
best->index &= ~MP_IDLE_MASK;
return (best);
}
static void
g_mpd(void *arg, int flags __unused)
{
struct g_geom *gp;
struct g_multipath_softc *sc;
struct g_consumer *cp;
int w;
g_topology_assert();
cp = arg;
gp = cp->geom;
if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0) {
w = cp->acw;
g_access(cp, -cp->acr, -cp->acw, -cp->ace);
if (w > 0 && cp->provider != NULL &&
(cp->provider->geom->flags & G_GEOM_WITHER) == 0) {
cp->index |= MP_WITHER;
g_post_event(g_mpd, cp, M_WAITOK, NULL);
return;
}
}
sc = gp->softc;
mtx_lock(&sc->sc_mtx);
if (cp->provider) {
printf("GEOM_MULTIPATH: %s removed from %s\n",
cp->provider->name, gp->name);
SDT_PROBE2(geom, multipath, config, remove,
gp->name, cp->provider->name);
g_detach(cp);
}
g_destroy_consumer(cp);
mtx_unlock(&sc->sc_mtx);
if (LIST_EMPTY(&gp->consumer))
g_multipath_destroy(gp);
}
static void
g_multipath_orphan(struct g_consumer *cp)
{
struct g_multipath_softc *sc;
uintptr_t *cnt;
g_topology_assert();
printf("GEOM_MULTIPATH: %s in %s was disconnected\n",
cp->provider->name, cp->geom->name);
SDT_PROBE2(geom, multipath, config, disconnect,
cp->geom->name, cp->provider->name);
sc = cp->geom->softc;
cnt = (uintptr_t *)&cp->private;
mtx_lock(&sc->sc_mtx);
sc->sc_ndisks--;
g_multipath_fault(cp, MP_LOST);
if (*cnt == 0 && (cp->index & MP_POSTED) == 0) {
cp->index |= MP_POSTED;
mtx_unlock(&sc->sc_mtx);
g_mpd(cp, 0);
} else
mtx_unlock(&sc->sc_mtx);
}
static void
g_multipath_resize(struct g_consumer *cp)
{
struct g_multipath_softc *sc;
struct g_geom *gp;
struct g_consumer *cp1;
struct g_provider *pp;
struct g_multipath_metadata md;
off_t size, psize, ssize;
int error;
g_topology_assert();
gp = cp->geom;
pp = cp->provider;
sc = gp->softc;
if (sc->sc_stopping)
return;
if (pp->mediasize < sc->sc_size) {
size = pp->mediasize;
ssize = pp->sectorsize;
} else {
size = ssize = OFF_MAX;
mtx_lock(&sc->sc_mtx);
LIST_FOREACH(cp1, &gp->consumer, consumer) {
pp = cp1->provider;
if (pp == NULL)
continue;
if (pp->mediasize < size) {
size = pp->mediasize;
ssize = pp->sectorsize;
}
}
mtx_unlock(&sc->sc_mtx);
if (size == OFF_MAX || size == sc->sc_size)
return;
}
psize = size - ((sc->sc_uuid[0] != 0) ? ssize : 0);
printf("GEOM_MULTIPATH: %s size changed from %jd to %jd\n",
sc->sc_name, sc->sc_pp->mediasize, psize);
if (sc->sc_uuid[0] != 0 && size < sc->sc_size) {
error = g_multipath_read_metadata(cp, &md);
if (error ||
(strcmp(md.md_magic, G_MULTIPATH_MAGIC) != 0) ||
(memcmp(md.md_uuid, sc->sc_uuid, sizeof(sc->sc_uuid)) != 0) ||
(strcmp(md.md_name, sc->sc_name) != 0) ||
(md.md_size != 0 && md.md_size != size) ||
(md.md_sectorsize != 0 && md.md_sectorsize != ssize)) {
g_multipath_destroy(gp);
return;
}
}
sc->sc_size = size;
g_resize_provider(sc->sc_pp, psize);
if (sc->sc_uuid[0] != 0) {
pp = cp->provider;
strlcpy(md.md_magic, G_MULTIPATH_MAGIC, sizeof(md.md_magic));
memcpy(md.md_uuid, sc->sc_uuid, sizeof (sc->sc_uuid));
strlcpy(md.md_name, sc->sc_name, sizeof(md.md_name));
md.md_version = G_MULTIPATH_VERSION;
md.md_size = size;
md.md_sectorsize = ssize;
md.md_active_active = sc->sc_active_active;
error = g_multipath_write_metadata(cp, &md);
if (error != 0)
printf("GEOM_MULTIPATH: Can't update metadata on %s "
"(%d)\n", pp->name, error);
}
}
static void
g_multipath_start(struct bio *bp)
{
struct g_multipath_softc *sc;
struct g_geom *gp;
struct g_consumer *cp;
struct bio *cbp;
uintptr_t *cnt;
gp = bp->bio_to->geom;
sc = gp->softc;
KASSERT(sc != NULL, ("NULL sc"));
cbp = g_clone_bio(bp);
if (cbp == NULL) {
g_io_deliver(bp, ENOMEM);
return;
}
mtx_lock(&sc->sc_mtx);
cp = g_multipath_choose(gp, bp);
if (cp == NULL) {
mtx_unlock(&sc->sc_mtx);
g_destroy_bio(cbp);
g_io_deliver(bp, ENXIO);
return;
}
if ((uintptr_t)bp->bio_driver1 < sc->sc_ndisks)
bp->bio_driver1 = (void *)(uintptr_t)sc->sc_ndisks;
cnt = (uintptr_t *)&cp->private;
(*cnt)++;
mtx_unlock(&sc->sc_mtx);
cbp->bio_done = g_multipath_done;
g_io_request(cbp, cp);
}
static void
g_multipath_done(struct bio *bp)
{
struct g_multipath_softc *sc;
struct g_consumer *cp;
uintptr_t *cnt;
if (bp->bio_error == ENXIO || bp->bio_error == EIO) {
mtx_lock(&gmtbq_mtx);
bioq_insert_tail(&gmtbq, bp);
mtx_unlock(&gmtbq_mtx);
wakeup(&g_multipath_kt_state);
} else {
cp = bp->bio_from;
sc = cp->geom->softc;
cnt = (uintptr_t *)&cp->private;
mtx_lock(&sc->sc_mtx);
(*cnt)--;
if (*cnt == 0 && (cp->index & MP_LOST)) {
if (g_post_event(g_mpd, cp, M_NOWAIT, NULL) == 0)
cp->index |= MP_POSTED;
mtx_unlock(&sc->sc_mtx);
} else
mtx_unlock(&sc->sc_mtx);
+ if (bp->bio_error == 0 &&
+ bp->bio_cmd == BIO_GETATTR &&
+ !strcmp(bp->bio_attribute, "GEOM::physpath"))
+ {
+ strlcat(bp->bio_data, "/mp", bp->bio_length);
+ }
g_std_done(bp);
}
}
static void
g_multipath_done_error(struct bio *bp)
{
struct bio *pbp;
struct g_geom *gp;
struct g_multipath_softc *sc;
struct g_consumer *cp;
struct g_provider *pp;
uintptr_t *cnt;
/*
* If we had a failure, we have to check first to see
* whether the consumer it failed on was the currently
* active consumer (i.e., this is the first in perhaps
* a number of failures). If so, we then switch consumers
* to the next available consumer.
*/
pbp = bp->bio_parent;
gp = pbp->bio_to->geom;
sc = gp->softc;
cp = bp->bio_from;
pp = cp->provider;
cnt = (uintptr_t *)&cp->private;
mtx_lock(&sc->sc_mtx);
if ((cp->index & MP_FAIL) == 0) {
printf("GEOM_MULTIPATH: Error %d, %s in %s marked FAIL\n",
bp->bio_error, pp->name, sc->sc_name);
SDT_PROBE3(geom, multipath, config, fail,
sc->sc_name, pp->name, bp->bio_error);
g_multipath_fault(cp, MP_FAIL);
}
(*cnt)--;
if (*cnt == 0 && (cp->index & (MP_LOST | MP_POSTED)) == MP_LOST) {
cp->index |= MP_POSTED;
mtx_unlock(&sc->sc_mtx);
g_post_event(g_mpd, cp, M_WAITOK, NULL);
} else
mtx_unlock(&sc->sc_mtx);
/*
* If we can fruitfully restart the I/O, do so.
*/
if (pbp->bio_children < (uintptr_t)pbp->bio_driver1) {
pbp->bio_inbed++;
SDT_PROBE2(geom, multipath, io, restart, bp, pbp);
g_destroy_bio(bp);
g_multipath_start(pbp);
} else {
g_std_done(bp);
}
}
static void
g_multipath_kt(void *arg)
{
g_multipath_kt_state = GKT_RUN;
mtx_lock(&gmtbq_mtx);
while (g_multipath_kt_state == GKT_RUN) {
for (;;) {
struct bio *bp;
bp = bioq_takefirst(&gmtbq);
if (bp == NULL)
break;
mtx_unlock(&gmtbq_mtx);
g_multipath_done_error(bp);
mtx_lock(&gmtbq_mtx);
}
if (g_multipath_kt_state != GKT_RUN)
break;
msleep(&g_multipath_kt_state, &gmtbq_mtx, PRIBIO,
"gkt:wait", 0);
}
mtx_unlock(&gmtbq_mtx);
wakeup(&g_multipath_kt_state);
kproc_exit(0);
}
static int
g_multipath_access(struct g_provider *pp, int dr, int dw, int de)
{
struct g_geom *gp;
struct g_consumer *cp, *badcp = NULL;
struct g_multipath_softc *sc;
int error;
gp = pp->geom;
/* Error used if we have no valid consumers. */
error = (dr > 0 || dw > 0 || de > 0) ? ENXIO : 0;
LIST_FOREACH(cp, &gp->consumer, consumer) {
if (cp->index & MP_WITHER)
continue;
error = g_access(cp, dr, dw, de);
if (error) {
badcp = cp;
goto fail;
}
}
if (error != 0)
return (error);
sc = gp->softc;
sc->sc_opened += dr + dw + de;
if (sc->sc_stopping && sc->sc_opened == 0)
g_multipath_destroy(gp);
return (0);
fail:
LIST_FOREACH(cp, &gp->consumer, consumer) {
if (cp == badcp)
break;
if (cp->index & MP_WITHER)
continue;
(void) g_access(cp, -dr, -dw, -de);
}
return (error);
}
static struct g_geom *
g_multipath_create(struct g_class *mp, struct g_multipath_metadata *md)
{
struct g_multipath_softc *sc;
struct g_geom *gp;
struct g_provider *pp;
g_topology_assert();
LIST_FOREACH(gp, &mp->geom, geom) {
sc = gp->softc;
if (sc == NULL || sc->sc_stopping)
continue;
if (strcmp(gp->name, md->md_name) == 0) {
printf("GEOM_MULTIPATH: name %s already exists\n",
md->md_name);
return (NULL);
}
}
gp = g_new_geomf(mp, "%s", md->md_name);
sc = g_malloc(sizeof(*sc), M_WAITOK | M_ZERO);
mtx_init(&sc->sc_mtx, "multipath", NULL, MTX_DEF);
memcpy(sc->sc_uuid, md->md_uuid, sizeof (sc->sc_uuid));
memcpy(sc->sc_name, md->md_name, sizeof (sc->sc_name));
sc->sc_active_active = md->md_active_active;
sc->sc_size = md->md_size;
gp->softc = sc;
gp->start = g_multipath_start;
gp->orphan = g_multipath_orphan;
gp->resize = g_multipath_resize;
gp->access = g_multipath_access;
gp->dumpconf = g_multipath_dumpconf;
pp = g_new_providerf(gp, "multipath/%s", md->md_name);
pp->flags |= G_PF_DIRECT_SEND | G_PF_DIRECT_RECEIVE;
if (md->md_size != 0) {
pp->mediasize = md->md_size -
((md->md_uuid[0] != 0) ? md->md_sectorsize : 0);
pp->sectorsize = md->md_sectorsize;
}
sc->sc_pp = pp;
g_error_provider(pp, 0);
printf("GEOM_MULTIPATH: %s created\n", gp->name);
return (gp);
}
static int
g_multipath_add_disk(struct g_geom *gp, struct g_provider *pp)
{
struct g_multipath_softc *sc;
struct g_consumer *cp, *nxtcp;
int error, acr, acw, ace;
g_topology_assert();
sc = gp->softc;
KASSERT(sc, ("no softc"));
/*
* Make sure that the passed provider isn't already attached
*/
LIST_FOREACH(cp, &gp->consumer, consumer) {
if (cp->provider == pp)
break;
}
if (cp) {
printf("GEOM_MULTIPATH: provider %s already attached to %s\n",
pp->name, gp->name);
return (EEXIST);
}
nxtcp = LIST_FIRST(&gp->consumer);
cp = g_new_consumer(gp);
cp->flags |= G_CF_DIRECT_SEND | G_CF_DIRECT_RECEIVE;
cp->private = NULL;
cp->index = MP_NEW;
error = g_attach(cp, pp);
if (error != 0) {
printf("GEOM_MULTIPATH: cannot attach %s to %s",
pp->name, sc->sc_name);
g_destroy_consumer(cp);
return (error);
}
/*
* Set access permissions on new consumer to match other consumers
*/
if (sc->sc_pp) {
acr = sc->sc_pp->acr;
acw = sc->sc_pp->acw;
ace = sc->sc_pp->ace;
} else
acr = acw = ace = 0;
if (g_multipath_exclusive) {
acr++;
acw++;
ace++;
}
error = g_access(cp, acr, acw, ace);
if (error) {
printf("GEOM_MULTIPATH: cannot set access in "
"attaching %s to %s (%d)\n",
pp->name, sc->sc_name, error);
g_detach(cp);
g_destroy_consumer(cp);
return (error);
}
if (sc->sc_size == 0) {
sc->sc_size = pp->mediasize -
((sc->sc_uuid[0] != 0) ? pp->sectorsize : 0);
sc->sc_pp->mediasize = sc->sc_size;
sc->sc_pp->sectorsize = pp->sectorsize;
}
if (sc->sc_pp->stripesize == 0 && sc->sc_pp->stripeoffset == 0) {
sc->sc_pp->stripesize = pp->stripesize;
sc->sc_pp->stripeoffset = pp->stripeoffset;
}
sc->sc_pp->flags |= pp->flags & G_PF_ACCEPT_UNMAPPED;
mtx_lock(&sc->sc_mtx);
cp->index = 0;
sc->sc_ndisks++;
mtx_unlock(&sc->sc_mtx);
printf("GEOM_MULTIPATH: %s added to %s\n",
pp->name, sc->sc_name);
if (sc->sc_active == NULL) {
sc->sc_active = cp;
if (sc->sc_active_active != 1)
printf("GEOM_MULTIPATH: %s is now active path in %s\n",
pp->name, sc->sc_name);
}
return (0);
}
static int
g_multipath_destroy(struct g_geom *gp)
{
struct g_multipath_softc *sc;
struct g_consumer *cp, *cp1;
g_topology_assert();
if (gp->softc == NULL)
return (ENXIO);
sc = gp->softc;
if (!sc->sc_stopping) {
printf("GEOM_MULTIPATH: destroying %s\n", gp->name);
sc->sc_stopping = 1;
}
if (sc->sc_opened != 0) {
g_wither_provider(sc->sc_pp, ENXIO);
sc->sc_pp = NULL;
return (EINPROGRESS);
}
LIST_FOREACH_SAFE(cp, &gp->consumer, consumer, cp1) {
mtx_lock(&sc->sc_mtx);
if ((cp->index & MP_POSTED) == 0) {
cp->index |= MP_POSTED;
mtx_unlock(&sc->sc_mtx);
g_mpd(cp, 0);
if (cp1 == NULL)
return(0); /* Recursion happened. */
} else
mtx_unlock(&sc->sc_mtx);
}
if (!LIST_EMPTY(&gp->consumer))
return (EINPROGRESS);
mtx_destroy(&sc->sc_mtx);
g_free(gp->softc);
gp->softc = NULL;
printf("GEOM_MULTIPATH: %s destroyed\n", gp->name);
g_wither_geom(gp, ENXIO);
return (0);
}
static int
g_multipath_destroy_geom(struct gctl_req *req, struct g_class *mp,
struct g_geom *gp)
{
return (g_multipath_destroy(gp));
}
static int
g_multipath_rotate(struct g_geom *gp)
{
struct g_consumer *lcp, *first_good_cp = NULL;
struct g_multipath_softc *sc = gp->softc;
int active_cp_seen = 0;
g_topology_assert();
if (sc == NULL)
return (ENXIO);
LIST_FOREACH(lcp, &gp->consumer, consumer) {
if ((lcp->index & MP_BAD) == 0) {
if (first_good_cp == NULL)
first_good_cp = lcp;
if (active_cp_seen)
break;
}
if (sc->sc_active == lcp)
active_cp_seen = 1;
}
if (lcp == NULL)
lcp = first_good_cp;
if (lcp && lcp != sc->sc_active) {
sc->sc_active = lcp;
if (sc->sc_active_active != 1)
printf("GEOM_MULTIPATH: %s is now active path in %s\n",
lcp->provider->name, sc->sc_name);
}
return (0);
}
static void
g_multipath_init(struct g_class *mp)
{
bioq_init(&gmtbq);
mtx_init(&gmtbq_mtx, "gmtbq", NULL, MTX_DEF);
kproc_create(g_multipath_kt, mp, NULL, 0, 0, "g_mp_kt");
}
static void
g_multipath_fini(struct g_class *mp)
{
if (g_multipath_kt_state == GKT_RUN) {
mtx_lock(&gmtbq_mtx);
g_multipath_kt_state = GKT_DIE;
wakeup(&g_multipath_kt_state);
msleep(&g_multipath_kt_state, &gmtbq_mtx, PRIBIO,
"gmp:fini", 0);
mtx_unlock(&gmtbq_mtx);
}
}
static int
g_multipath_read_metadata(struct g_consumer *cp,
struct g_multipath_metadata *md)
{
struct g_provider *pp;
u_char *buf;
int error;
g_topology_assert();
error = g_access(cp, 1, 0, 0);
if (error != 0)
return (error);
pp = cp->provider;
g_topology_unlock();
buf = g_read_data(cp, pp->mediasize - pp->sectorsize,
pp->sectorsize, &error);
g_topology_lock();
g_access(cp, -1, 0, 0);
if (buf == NULL)
return (error);
multipath_metadata_decode(buf, md);
g_free(buf);
return (0);
}
static int
g_multipath_write_metadata(struct g_consumer *cp,
struct g_multipath_metadata *md)
{
struct g_provider *pp;
u_char *buf;
int error;
g_topology_assert();
error = g_access(cp, 1, 1, 1);
if (error != 0)
return (error);
pp = cp->provider;
g_topology_unlock();
buf = g_malloc(pp->sectorsize, M_WAITOK | M_ZERO);
multipath_metadata_encode(md, buf);
error = g_write_data(cp, pp->mediasize - pp->sectorsize,
buf, pp->sectorsize);
g_topology_lock();
g_access(cp, -1, -1, -1);
g_free(buf);
return (error);
}
static struct g_geom *
g_multipath_taste(struct g_class *mp, struct g_provider *pp, int flags __unused)
{
struct g_multipath_metadata md;
struct g_multipath_softc *sc;
struct g_consumer *cp;
struct g_geom *gp, *gp1;
int error, isnew;
g_topology_assert();
gp = g_new_geomf(mp, "multipath:taste");
gp->start = g_multipath_start;
gp->access = g_multipath_access;
gp->orphan = g_multipath_orphan;
cp = g_new_consumer(gp);
g_attach(cp, pp);
error = g_multipath_read_metadata(cp, &md);
g_detach(cp);
g_destroy_consumer(cp);
g_destroy_geom(gp);
if (error != 0)
return (NULL);
gp = NULL;
if (strcmp(md.md_magic, G_MULTIPATH_MAGIC) != 0) {
if (g_multipath_debug)
printf("%s is not MULTIPATH\n", pp->name);
return (NULL);
}
if (md.md_version != G_MULTIPATH_VERSION) {
printf("%s has version %d multipath id- this module is version "
" %d: rejecting\n", pp->name, md.md_version,
G_MULTIPATH_VERSION);
return (NULL);
}
if (md.md_size != 0 && md.md_size != pp->mediasize)
return (NULL);
if (md.md_sectorsize != 0 && md.md_sectorsize != pp->sectorsize)
return (NULL);
if (g_multipath_debug)
printf("MULTIPATH: %s/%s\n", md.md_name, md.md_uuid);
SDT_PROBE2(geom, multipath, config, taste, md.md_name, md.md_uuid);
/*
* Let's check if such a device already is present. We check against
* uuid alone first because that's the true distinguishor. If that
* passes, then we check for name conflicts. If there are conflicts,
* modify the name.
*
* The whole purpose of this is to solve the problem that people don't
* pick good unique names, but good unique names (like uuids) are a
* pain to use. So, we allow people to build GEOMs with friendly names
* and uuids, and modify the names in case there's a collision.
*/
sc = NULL;
LIST_FOREACH(gp, &mp->geom, geom) {
sc = gp->softc;
if (sc == NULL || sc->sc_stopping)
continue;
if (strncmp(md.md_uuid, sc->sc_uuid, sizeof(md.md_uuid)) == 0)
break;
}
LIST_FOREACH(gp1, &mp->geom, geom) {
if (gp1 == gp)
continue;
sc = gp1->softc;
if (sc == NULL || sc->sc_stopping)
continue;
if (strncmp(md.md_name, sc->sc_name, sizeof(md.md_name)) == 0)
break;
}
/*
* If gp is NULL, we had no extant MULTIPATH geom with this uuid.
*
* If gp1 is *not* NULL, that means we have a MULTIPATH geom extant
* with the same name (but a different UUID).
*
* If gp is NULL, then modify the name with a random number and
* complain, but allow the creation of the geom to continue.
*
* If gp is *not* NULL, just use the geom's name as we're attaching
* this disk to the (previously generated) name.
*/
if (gp1) {
sc = gp1->softc;
if (gp == NULL) {
char buf[16];
u_long rand = random();
snprintf(buf, sizeof (buf), "%s-%lu", md.md_name, rand);
printf("GEOM_MULTIPATH: geom %s/%s exists already\n",
sc->sc_name, sc->sc_uuid);
printf("GEOM_MULTIPATH: %s will be (temporarily) %s\n",
md.md_uuid, buf);
strlcpy(md.md_name, buf, sizeof(md.md_name));
} else {
strlcpy(md.md_name, sc->sc_name, sizeof(md.md_name));
}
}
if (gp == NULL) {
gp = g_multipath_create(mp, &md);
if (gp == NULL) {
printf("GEOM_MULTIPATH: cannot create geom %s/%s\n",
md.md_name, md.md_uuid);
return (NULL);
}
isnew = 1;
} else {
isnew = 0;
}
sc = gp->softc;
KASSERT(sc != NULL, ("sc is NULL"));
error = g_multipath_add_disk(gp, pp);
if (error != 0) {
if (isnew)
g_multipath_destroy(gp);
return (NULL);
}
return (gp);
}
static void
g_multipath_ctl_add_name(struct gctl_req *req, struct g_class *mp,
const char *name)
{
struct g_multipath_softc *sc;
struct g_geom *gp;
struct g_consumer *cp;
struct g_provider *pp;
const char *mpname;
static const char devpf[6] = "/dev/";
int error;
g_topology_assert();
mpname = gctl_get_asciiparam(req, "arg0");
if (mpname == NULL) {
gctl_error(req, "No 'arg0' argument");
return;
}
gp = g_multipath_find_geom(mp, mpname);
if (gp == NULL) {
gctl_error(req, "Device %s is invalid", mpname);
return;
}
sc = gp->softc;
if (strncmp(name, devpf, 5) == 0)
name += 5;
pp = g_provider_by_name(name);
if (pp == NULL) {
gctl_error(req, "Provider %s is invalid", name);
return;
}
/*
* Check to make sure parameters match.
*/
LIST_FOREACH(cp, &gp->consumer, consumer) {
if (cp->provider == pp) {
gctl_error(req, "provider %s is already there",
pp->name);
return;
}
}
if (sc->sc_pp->mediasize != 0 &&
sc->sc_pp->mediasize + (sc->sc_uuid[0] != 0 ? pp->sectorsize : 0)
!= pp->mediasize) {
gctl_error(req, "Providers size mismatch %jd != %jd",
(intmax_t) sc->sc_pp->mediasize +
(sc->sc_uuid[0] != 0 ? pp->sectorsize : 0),
(intmax_t) pp->mediasize);
return;
}
if (sc->sc_pp->sectorsize != 0 &&
sc->sc_pp->sectorsize != pp->sectorsize) {
gctl_error(req, "Providers sectorsize mismatch %u != %u",
sc->sc_pp->sectorsize, pp->sectorsize);
return;
}
error = g_multipath_add_disk(gp, pp);
if (error != 0)
gctl_error(req, "Provider addition error: %d", error);
}
static void
g_multipath_ctl_prefer(struct gctl_req *req, struct g_class *mp)
{
struct g_geom *gp;
struct g_multipath_softc *sc;
struct g_consumer *cp;
const char *name, *mpname;
static const char devpf[6] = "/dev/";
int *nargs;
g_topology_assert();
mpname = gctl_get_asciiparam(req, "arg0");
if (mpname == NULL) {
gctl_error(req, "No 'arg0' argument");
return;
}
gp = g_multipath_find_geom(mp, mpname);
if (gp == NULL) {
gctl_error(req, "Device %s is invalid", mpname);
return;
}
sc = gp->softc;
nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
if (nargs == NULL) {
gctl_error(req, "No 'nargs' argument");
return;
}
if (*nargs != 2) {
gctl_error(req, "missing device");
return;
}
name = gctl_get_asciiparam(req, "arg1");
if (name == NULL) {
gctl_error(req, "No 'arg1' argument");
return;
}
if (strncmp(name, devpf, 5) == 0) {
name += 5;
}
LIST_FOREACH(cp, &gp->consumer, consumer) {
if (cp->provider != NULL
&& strcmp(cp->provider->name, name) == 0)
break;
}
if (cp == NULL) {
gctl_error(req, "Provider %s not found", name);
return;
}
mtx_lock(&sc->sc_mtx);
if (cp->index & MP_BAD) {
gctl_error(req, "Consumer %s is invalid", name);
mtx_unlock(&sc->sc_mtx);
return;
}
/* Here when the consumer is present and in good shape */
sc->sc_active = cp;
if (!sc->sc_active_active)
printf("GEOM_MULTIPATH: %s now active path in %s\n",
sc->sc_active->provider->name, sc->sc_name);
mtx_unlock(&sc->sc_mtx);
}
static void
g_multipath_ctl_add(struct gctl_req *req, struct g_class *mp)
{
struct g_multipath_softc *sc;
struct g_geom *gp;
const char *mpname, *name;
mpname = gctl_get_asciiparam(req, "arg0");
if (mpname == NULL) {
gctl_error(req, "No 'arg0' argument");
return;
}
gp = g_multipath_find_geom(mp, mpname);
if (gp == NULL) {
gctl_error(req, "Device %s not found", mpname);
return;
}
sc = gp->softc;
name = gctl_get_asciiparam(req, "arg1");
if (name == NULL) {
gctl_error(req, "No 'arg1' argument");
return;
}
g_multipath_ctl_add_name(req, mp, name);
}
static void
g_multipath_ctl_create(struct gctl_req *req, struct g_class *mp)
{
struct g_multipath_metadata md;
struct g_multipath_softc *sc;
struct g_geom *gp;
const char *mpname, *name;
char param[16];
int *nargs, i, *val;
g_topology_assert();
nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
if (*nargs < 2) {
gctl_error(req, "wrong number of arguments.");
return;
}
mpname = gctl_get_asciiparam(req, "arg0");
if (mpname == NULL) {
gctl_error(req, "No 'arg0' argument");
return;
}
gp = g_multipath_find_geom(mp, mpname);
if (gp != NULL) {
gctl_error(req, "Device %s already exist", mpname);
return;
}
memset(&md, 0, sizeof(md));
strlcpy(md.md_magic, G_MULTIPATH_MAGIC, sizeof(md.md_magic));
md.md_version = G_MULTIPATH_VERSION;
strlcpy(md.md_name, mpname, sizeof(md.md_name));
md.md_size = 0;
md.md_sectorsize = 0;
md.md_uuid[0] = 0;
md.md_active_active = 0;
val = gctl_get_paraml(req, "active_active", sizeof(*val));
if (val != NULL && *val != 0)
md.md_active_active = 1;
val = gctl_get_paraml(req, "active_read", sizeof(*val));
if (val != NULL && *val != 0)
md.md_active_active = 2;
gp = g_multipath_create(mp, &md);
if (gp == NULL) {
gctl_error(req, "GEOM_MULTIPATH: cannot create geom %s/%s\n",
md.md_name, md.md_uuid);
return;
}
sc = gp->softc;
for (i = 1; i < *nargs; i++) {
snprintf(param, sizeof(param), "arg%d", i);
name = gctl_get_asciiparam(req, param);
g_multipath_ctl_add_name(req, mp, name);
}
if (sc->sc_ndisks != (*nargs - 1))
g_multipath_destroy(gp);
}
static void
g_multipath_ctl_configure(struct gctl_req *req, struct g_class *mp)
{
struct g_multipath_softc *sc;
struct g_geom *gp;
struct g_consumer *cp;
struct g_provider *pp;
struct g_multipath_metadata md;
const char *name;
int error, *val;
g_topology_assert();
name = gctl_get_asciiparam(req, "arg0");
if (name == NULL) {
gctl_error(req, "No 'arg0' argument");
return;
}
gp = g_multipath_find_geom(mp, name);
if (gp == NULL) {
gctl_error(req, "Device %s is invalid", name);
return;
}
sc = gp->softc;
val = gctl_get_paraml(req, "active_active", sizeof(*val));
if (val != NULL && *val != 0)
sc->sc_active_active = 1;
val = gctl_get_paraml(req, "active_read", sizeof(*val));
if (val != NULL && *val != 0)
sc->sc_active_active = 2;
val = gctl_get_paraml(req, "active_passive", sizeof(*val));
if (val != NULL && *val != 0)
sc->sc_active_active = 0;
if (sc->sc_uuid[0] != 0 && sc->sc_active != NULL) {
cp = sc->sc_active;
pp = cp->provider;
strlcpy(md.md_magic, G_MULTIPATH_MAGIC, sizeof(md.md_magic));
memcpy(md.md_uuid, sc->sc_uuid, sizeof (sc->sc_uuid));
strlcpy(md.md_name, name, sizeof(md.md_name));
md.md_version = G_MULTIPATH_VERSION;
md.md_size = pp->mediasize;
md.md_sectorsize = pp->sectorsize;
md.md_active_active = sc->sc_active_active;
error = g_multipath_write_metadata(cp, &md);
if (error != 0)
gctl_error(req, "Can't update metadata on %s (%d)",
pp->name, error);
}
}
static void
g_multipath_ctl_fail(struct gctl_req *req, struct g_class *mp, int fail)
{
struct g_multipath_softc *sc;
struct g_geom *gp;
struct g_consumer *cp;
const char *mpname, *name;
int found;
mpname = gctl_get_asciiparam(req, "arg0");
if (mpname == NULL) {
gctl_error(req, "No 'arg0' argument");
return;
}
gp = g_multipath_find_geom(mp, mpname);
if (gp == NULL) {
gctl_error(req, "Device %s not found", mpname);
return;
}
sc = gp->softc;
name = gctl_get_asciiparam(req, "arg1");
if (name == NULL) {
gctl_error(req, "No 'arg1' argument");
return;
}
found = 0;
mtx_lock(&sc->sc_mtx);
LIST_FOREACH(cp, &gp->consumer, consumer) {
if (cp->provider != NULL &&
strcmp(cp->provider->name, name) == 0 &&
(cp->index & MP_LOST) == 0) {
found = 1;
if (!fail == !(cp->index & MP_FAIL))
continue;
printf("GEOM_MULTIPATH: %s in %s is marked %s.\n",
name, sc->sc_name, fail ? "FAIL" : "OK");
if (fail) {
g_multipath_fault(cp, MP_FAIL);
SDT_PROBE3(geom, multipath, config, fail,
sc->sc_name, cp->provider->name, 0);
} else {
cp->index &= ~MP_FAIL;
SDT_PROBE2(geom, multipath, config, restore,
sc->sc_name, cp->provider->name);
}
}
}
mtx_unlock(&sc->sc_mtx);
if (found == 0)
gctl_error(req, "Provider %s not found", name);
}
static void
g_multipath_ctl_remove(struct gctl_req *req, struct g_class *mp)
{
struct g_multipath_softc *sc;
struct g_geom *gp;
struct g_consumer *cp, *cp1;
const char *mpname, *name;
uintptr_t *cnt;
int found;
mpname = gctl_get_asciiparam(req, "arg0");
if (mpname == NULL) {
gctl_error(req, "No 'arg0' argument");
return;
}
gp = g_multipath_find_geom(mp, mpname);
if (gp == NULL) {
gctl_error(req, "Device %s not found", mpname);
return;
}
sc = gp->softc;
name = gctl_get_asciiparam(req, "arg1");
if (name == NULL) {
gctl_error(req, "No 'arg1' argument");
return;
}
found = 0;
mtx_lock(&sc->sc_mtx);
LIST_FOREACH_SAFE(cp, &gp->consumer, consumer, cp1) {
if (cp->provider != NULL &&
strcmp(cp->provider->name, name) == 0 &&
(cp->index & MP_LOST) == 0) {
found = 1;
printf("GEOM_MULTIPATH: removing %s from %s\n",
cp->provider->name, cp->geom->name);
SDT_PROBE2(geom, multipath, config, remove,
cp->geom->name, cp->provider->name);
sc->sc_ndisks--;
g_multipath_fault(cp, MP_LOST);
cnt = (uintptr_t *)&cp->private;
if (*cnt == 0 && (cp->index & MP_POSTED) == 0) {
cp->index |= MP_POSTED;
mtx_unlock(&sc->sc_mtx);
g_mpd(cp, 0);
if (cp1 == NULL)
return; /* Recursion happened. */
mtx_lock(&sc->sc_mtx);
}
}
}
mtx_unlock(&sc->sc_mtx);
if (found == 0)
gctl_error(req, "Provider %s not found", name);
}
static struct g_geom *
g_multipath_find_geom(struct g_class *mp, const char *name)
{
struct g_geom *gp;
struct g_multipath_softc *sc;
LIST_FOREACH(gp, &mp->geom, geom) {
sc = gp->softc;
if (sc == NULL || sc->sc_stopping)
continue;
if (strcmp(gp->name, name) == 0)
return (gp);
}
return (NULL);
}
static void
g_multipath_ctl_stop(struct gctl_req *req, struct g_class *mp)
{
struct g_geom *gp;
const char *name;
int error;
g_topology_assert();
name = gctl_get_asciiparam(req, "arg0");
if (name == NULL) {
gctl_error(req, "No 'arg0' argument");
return;
}
gp = g_multipath_find_geom(mp, name);
if (gp == NULL) {
gctl_error(req, "Device %s is invalid", name);
return;
}
error = g_multipath_destroy(gp);
if (error != 0 && error != EINPROGRESS)
gctl_error(req, "failed to stop %s (err=%d)", name, error);
}
static void
g_multipath_ctl_destroy(struct gctl_req *req, struct g_class *mp)
{
struct g_geom *gp;
struct g_multipath_softc *sc;
struct g_consumer *cp;
struct g_provider *pp;
const char *name;
uint8_t *buf;
int error;
g_topology_assert();
name = gctl_get_asciiparam(req, "arg0");
if (name == NULL) {
gctl_error(req, "No 'arg0' argument");
return;
}
gp = g_multipath_find_geom(mp, name);
if (gp == NULL) {
gctl_error(req, "Device %s is invalid", name);
return;
}
sc = gp->softc;
if (sc->sc_uuid[0] != 0 && sc->sc_active != NULL) {
cp = sc->sc_active;
pp = cp->provider;
error = g_access(cp, 1, 1, 1);
if (error != 0) {
gctl_error(req, "Can't open %s (%d)", pp->name, error);
goto destroy;
}
g_topology_unlock();
buf = g_malloc(pp->sectorsize, M_WAITOK | M_ZERO);
error = g_write_data(cp, pp->mediasize - pp->sectorsize,
buf, pp->sectorsize);
g_topology_lock();
g_access(cp, -1, -1, -1);
if (error != 0)
gctl_error(req, "Can't erase metadata on %s (%d)",
pp->name, error);
}
destroy:
error = g_multipath_destroy(gp);
if (error != 0 && error != EINPROGRESS)
gctl_error(req, "failed to destroy %s (err=%d)", name, error);
}
static void
g_multipath_ctl_rotate(struct gctl_req *req, struct g_class *mp)
{
struct g_geom *gp;
const char *name;
int error;
g_topology_assert();
name = gctl_get_asciiparam(req, "arg0");
if (name == NULL) {
gctl_error(req, "No 'arg0' argument");
return;
}
gp = g_multipath_find_geom(mp, name);
if (gp == NULL) {
gctl_error(req, "Device %s is invalid", name);
return;
}
error = g_multipath_rotate(gp);
if (error != 0) {
gctl_error(req, "failed to rotate %s (err=%d)", name, error);
}
}
static void
g_multipath_ctl_getactive(struct gctl_req *req, struct g_class *mp)
{
struct sbuf *sb;
struct g_geom *gp;
struct g_multipath_softc *sc;
struct g_consumer *cp;
const char *name;
int empty;
sb = sbuf_new_auto();
g_topology_assert();
name = gctl_get_asciiparam(req, "arg0");
if (name == NULL) {
gctl_error(req, "No 'arg0' argument");
return;
}
gp = g_multipath_find_geom(mp, name);
if (gp == NULL) {
gctl_error(req, "Device %s is invalid", name);
return;
}
sc = gp->softc;
if (sc->sc_active_active == 1) {
empty = 1;
LIST_FOREACH(cp, &gp->consumer, consumer) {
if (cp->index & MP_BAD)
continue;
if (!empty)
sbuf_cat(sb, " ");
sbuf_cat(sb, cp->provider->name);
empty = 0;
}
if (empty)
sbuf_cat(sb, "none");
sbuf_cat(sb, "\n");
} else if (sc->sc_active && sc->sc_active->provider) {
sbuf_printf(sb, "%s\n", sc->sc_active->provider->name);
} else {
sbuf_cat(sb, "none\n");
}
sbuf_finish(sb);
gctl_set_param_err(req, "output", sbuf_data(sb), sbuf_len(sb) + 1);
sbuf_delete(sb);
}
static void
g_multipath_config(struct gctl_req *req, struct g_class *mp, const char *verb)
{
uint32_t *version;
g_topology_assert();
version = gctl_get_paraml(req, "version", sizeof(*version));
if (version == NULL) {
gctl_error(req, "No 'version' argument");
} else if (*version != G_MULTIPATH_VERSION) {
gctl_error(req, "Userland and kernel parts are out of sync");
} else if (strcmp(verb, "add") == 0) {
g_multipath_ctl_add(req, mp);
} else if (strcmp(verb, "prefer") == 0) {
g_multipath_ctl_prefer(req, mp);
} else if (strcmp(verb, "create") == 0) {
g_multipath_ctl_create(req, mp);
} else if (strcmp(verb, "configure") == 0) {
g_multipath_ctl_configure(req, mp);
} else if (strcmp(verb, "stop") == 0) {
g_multipath_ctl_stop(req, mp);
} else if (strcmp(verb, "destroy") == 0) {
g_multipath_ctl_destroy(req, mp);
} else if (strcmp(verb, "fail") == 0) {
g_multipath_ctl_fail(req, mp, 1);
} else if (strcmp(verb, "restore") == 0) {
g_multipath_ctl_fail(req, mp, 0);
} else if (strcmp(verb, "remove") == 0) {
g_multipath_ctl_remove(req, mp);
} else if (strcmp(verb, "rotate") == 0) {
g_multipath_ctl_rotate(req, mp);
} else if (strcmp(verb, "getactive") == 0) {
g_multipath_ctl_getactive(req, mp);
} else {
gctl_error(req, "Unknown verb %s", verb);
}
}
static void
g_multipath_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp,
struct g_consumer *cp, struct g_provider *pp)
{
struct g_multipath_softc *sc;
int good;
g_topology_assert();
sc = gp->softc;
if (sc == NULL)
return;
if (cp != NULL) {
sbuf_printf(sb, "%s<State>%s</State>\n", indent,
(cp->index & MP_NEW) ? "NEW" :
(cp->index & MP_LOST) ? "LOST" :
(cp->index & MP_FAIL) ? "FAIL" :
(sc->sc_active_active == 1 || sc->sc_active == cp) ?
"ACTIVE" :
sc->sc_active_active == 2 ? "READ" : "PASSIVE");
} else {
good = g_multipath_good(gp);
sbuf_printf(sb, "%s<State>%s</State>\n", indent,
good == 0 ? "BROKEN" :
(good != sc->sc_ndisks || sc->sc_ndisks == 1) ?
"DEGRADED" : "OPTIMAL");
}
if (cp == NULL && pp == NULL) {
sbuf_printf(sb, "%s<UUID>%s</UUID>\n", indent, sc->sc_uuid);
sbuf_printf(sb, "%s<Mode>Active/%s</Mode>\n", indent,
sc->sc_active_active == 2 ? "Read" :
sc->sc_active_active == 1 ? "Active" : "Passive");
sbuf_printf(sb, "%s<Type>%s</Type>\n", indent,
sc->sc_uuid[0] == 0 ? "MANUAL" : "AUTOMATIC");
}
}
DECLARE_GEOM_CLASS(g_multipath_class, g_multipath);
MODULE_VERSION(geom_multipath, 0);
diff --git a/tests/sys/geom/class/multipath/misc.sh b/tests/sys/geom/class/multipath/misc.sh
index 583434e1cfa5..4da8462588ca 100755
--- a/tests/sys/geom/class/multipath/misc.sh
+++ b/tests/sys/geom/class/multipath/misc.sh
@@ -1,363 +1,363 @@
#!/bin/sh
# Copyright (c) 2019 Axcient
#
# 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.
#
# $FreeBSD$
. $(atf_get_srcdir)/conf.sh
atf_test_case add cleanup
add_head()
{
atf_set "descr" "Add a new path"
atf_set "require.user" "root"
}
add_body()
{
load_gmultipath
load_dtrace
md0=$(alloc_md)
md1=$(alloc_md)
md2=$(alloc_md)
name=$(mkname)
atf_check -s exit:0 gmultipath create "$name" ${md0} ${md1}
check_multipath_state ${md0} "OPTIMAL" "ACTIVE" "PASSIVE"
# Add a new path
atf_check -s exit:0 gmultipath add "$name" ${md2}
check_multipath_state ${md0} "OPTIMAL" "ACTIVE" "PASSIVE" "PASSIVE"
}
add_cleanup()
{
common_cleanup
}
atf_test_case create_A cleanup
create_A_head()
{
atf_set "descr" "Create an Active/Active multipath device"
atf_set "require.user" "root"
}
create_A_body()
{
load_gmultipath
load_dtrace
md0=$(alloc_md)
md1=$(alloc_md)
name=$(mkname)
atf_check -s exit:0 gmultipath create -A "$name" ${md0} ${md1}
check_multipath_state "${md1} ${md0}" "OPTIMAL" "ACTIVE" "ACTIVE"
}
create_A_cleanup()
{
common_cleanup
}
atf_test_case create_R cleanup
create_R_head()
{
atf_set "descr" "Create an Active/Read multipath device"
atf_set "require.user" "root"
}
create_R_body()
{
load_gmultipath
load_dtrace
md0=$(alloc_md)
md1=$(alloc_md)
name=$(mkname)
atf_check -s exit:0 gmultipath create -R "$name" ${md0} ${md1}
check_multipath_state ${md0} "OPTIMAL" "ACTIVE" "READ"
}
create_R_cleanup()
{
common_cleanup
}
atf_test_case depart_and_arrive cleanup
depart_and_arrive_head()
{
atf_set "descr" "gmultipath should remove devices that disappear, and automatically reattach labeled providers that reappear"
atf_set "require.user" "root"
}
depart_and_arrive_body()
{
load_gnop
load_gmultipath
md0=$(alloc_md)
md1=$(alloc_md)
name=$(mkname)
# We need a non-zero offset to gmultipath won't see the label when it
# tastes the md device. We only want the label to be visible on the
# gnop device.
offset=131072
atf_check gnop create -o $offset /dev/${md0}
atf_check gnop create -o $offset /dev/${md1}
atf_check -s exit:0 gmultipath label "$name" ${md0}.nop
# gmultipath is too smart to let us create a gmultipath device by label
# when the two providers aren't actually related. So we create a
# device by label with one provider, and then manually add the second.
atf_check -s exit:0 gmultipath add "$name" ${md1}.nop
NDEVS=`gmultipath list "$name" | grep -c 'md[0-9]*\.nop'`
atf_check_equal 2 $NDEVS
# Now fail the labeled provider
atf_check -s exit:0 gnop destroy -f ${md0}.nop
# It should be automatically removed from the multipath device
NDEVS=`gmultipath list "$name" | grep -c 'md[0-9]*\.nop'`
atf_check_equal 1 $NDEVS
# Now return the labeled provider
atf_check gnop create -o $offset /dev/${md0}
# It should be automatically restored to the multipath device. We
# don't really care which path is active.
NDEVS=`gmultipath list "$name" | grep -c 'md[0-9]*\.nop'`
atf_check_equal 2 $NDEVS
STATE=`gmultipath list "$name" | awk '/^State:/ {print $2}'`
atf_check_equal "OPTIMAL" $STATE
}
depart_and_arrive_cleanup()
{
common_cleanup
}
atf_test_case fail cleanup
fail_head()
{
atf_set "descr" "Manually fail a path"
atf_set "require.user" "root"
}
fail_body()
{
load_gmultipath
md0=$(alloc_md)
md1=$(alloc_md)
name=$(mkname)
atf_check -s exit:0 gmultipath create "$name" ${md0} ${md1}
check_multipath_state ${md0} "OPTIMAL" "ACTIVE" "PASSIVE"
# Manually fail the active path
atf_check -s exit:0 gmultipath fail "$name" ${md0}
check_multipath_state ${md1} "DEGRADED" "FAIL" "ACTIVE"
}
fail_cleanup()
{
common_cleanup
}
atf_test_case fail_on_error cleanup
fail_on_error_head()
{
atf_set "descr" "An error in the provider will cause gmultipath to mark it as FAIL"
atf_set "require.user" "root"
}
fail_on_error_body()
{
load_gnop
load_gmultipath
md0=$(alloc_md)
md1=$(alloc_md)
name=$(mkname)
atf_check gnop create /dev/${md0}
atf_check gnop create /dev/${md1}
atf_check -s exit:0 gmultipath create "$name" ${md0}.nop ${md1}.nop
# The first I/O to the first path should fail, causing gmultipath to
# fail over to the second path.
atf_check gnop configure -r 100 -w 100 ${md0}.nop
atf_check -s exit:0 -o ignore -e ignore dd if=/dev/zero of=/dev/multipath/"$name" bs=4096 count=1
check_multipath_state ${md1}.nop "DEGRADED" "FAIL" "ACTIVE"
}
fail_on_error_cleanup()
{
common_cleanup
}
atf_test_case physpath cleanup
physpath_head()
{
- atf_set "descr" "gmultipath should pass through the underlying providers' physical path"
+ atf_set "descr" "gmultipath should append /mp to the underlying providers' physical path"
atf_set "require.user" "root"
}
physpath_body()
{
load_gnop
load_gmultipath
md0=$(alloc_md)
md1=$(alloc_md)
name=$(mkname)
physpath="some/physical/path"
# Create two providers with the same physical paths, mimicing how
# multipathed SAS drives appear. This is the normal way to use
# gmultipath. If the underlying providers' physical paths differ,
# then you're probably using gmultipath wrong.
atf_check gnop create -z $physpath /dev/${md0}
atf_check gnop create -z $physpath /dev/${md1}
atf_check -s exit:0 gmultipath create "$name" ${md0}.nop ${md1}.nop
gmultipath_physpath=$(diskinfo -p multipath/"$name")
- atf_check_equal "$physpath" "$gmultipath_physpath"
+ atf_check_equal "$physpath/mp" "$gmultipath_physpath"
}
physpath_cleanup()
{
common_cleanup
}
atf_test_case prefer cleanup
prefer_head()
{
atf_set "descr" "Manually select the preferred path"
atf_set "require.user" "root"
}
prefer_body()
{
load_gmultipath
load_dtrace
md0=$(alloc_md)
md1=$(alloc_md)
md2=$(alloc_md)
name=$(mkname)
atf_check -s exit:0 gmultipath create "$name" ${md0} ${md1} ${md2}
check_multipath_state ${md0} "OPTIMAL" "ACTIVE" "PASSIVE" "PASSIVE"
# Explicitly prefer the final path
atf_check -s exit:0 gmultipath prefer "$name" ${md2}
check_multipath_state ${md2} "OPTIMAL" "PASSIVE" "PASSIVE" "ACTIVE"
}
prefer_cleanup()
{
common_cleanup
}
atf_test_case restore cleanup
restore_head()
{
atf_set "descr" "Manually restore a failed path"
atf_set "require.user" "root"
}
restore_body()
{
load_gmultipath
load_dtrace
md0=$(alloc_md)
md1=$(alloc_md)
name=$(mkname)
atf_check -s exit:0 gmultipath create "$name" ${md0} ${md1}
# Explicitly fail the first path
atf_check -s exit:0 gmultipath fail "$name" ${md0}
check_multipath_state ${md1} "DEGRADED" "FAIL" "ACTIVE"
# Explicitly restore it
atf_check -s exit:0 gmultipath restore "$name" ${md0}
check_multipath_state ${md1} "OPTIMAL" "PASSIVE" "ACTIVE"
}
restore_cleanup()
{
common_cleanup
}
atf_test_case restore_on_error cleanup
restore_on_error_head()
{
atf_set "descr" "A failed path should be restored if an I/O error is encountered on all other active paths"
atf_set "require.user" "root"
}
restore_on_error_body()
{
load_gnop
load_gmultipath
load_dtrace
md0=$(alloc_md)
md1=$(alloc_md)
name=$(mkname)
atf_check gnop create /dev/${md0}
atf_check gnop create /dev/${md1}
atf_check -s exit:0 gmultipath create "$name" ${md0}.nop ${md1}.nop
# Explicitly fail the first path
atf_check -s exit:0 gmultipath fail "$name" ${md0}.nop
# Setup the second path to fail on the next I/O
atf_check gnop configure -r 100 -w 100 ${md1}.nop
atf_check -s exit:0 -o ignore -e ignore \
dd if=/dev/zero of=/dev/multipath/"$name" bs=4096 count=1
# Now the first path should be active, and the second should be failed
check_multipath_state ${md0}.nop "DEGRADED" "ACTIVE" "FAIL"
}
restore_on_error_cleanup()
{
common_cleanup
}
atf_test_case rotate cleanup
rotate_head()
{
atf_set "descr" "Manually rotate the active path"
atf_set "require.user" "root"
}
rotate_body()
{
load_gmultipath
load_dtrace
md0=$(alloc_md)
md1=$(alloc_md)
md2=$(alloc_md)
name=$(mkname)
atf_check -s exit:0 gmultipath create "$name" ${md0} ${md1} ${md2}
check_multipath_state ${md0} "OPTIMAL" "ACTIVE" "PASSIVE" "PASSIVE"
# Explicitly rotate the paths
atf_check -s exit:0 gmultipath rotate "$name"
check_multipath_state ${md2} "OPTIMAL" "PASSIVE" "PASSIVE" "ACTIVE"
# Again
atf_check -s exit:0 gmultipath rotate "$name"
check_multipath_state ${md1} "OPTIMAL" "PASSIVE" "ACTIVE" "PASSIVE"
# Final rotation should restore original configuration
atf_check -s exit:0 gmultipath rotate "$name"
check_multipath_state ${md0} "OPTIMAL" "ACTIVE" "PASSIVE" "PASSIVE"
}
rotate_cleanup()
{
common_cleanup
}
atf_init_test_cases()
{
atf_add_test_case add
atf_add_test_case create_A
atf_add_test_case create_R
atf_add_test_case depart_and_arrive
atf_add_test_case fail
atf_add_test_case fail_on_error
atf_add_test_case physpath
atf_add_test_case prefer
atf_add_test_case restore
atf_add_test_case restore_on_error
atf_add_test_case rotate
}