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b79cac0f92
freebsd-dev/sys/geom/vinum/geom_vinum.c
Ulf Lilleengen b79cac0f92 - Fix the issue with read access count modification on RAID-5 plexes properly. 
If the access counts were not increased and decreased in equal numbers by
  gvinum consumers, the read access count would be inconsistent with the write
  access count. Instead, modify the read access count with the write access
  count directly to prevent any inconsistencies.

Approved by:	re (kib)
2009-07-18 11:12:48 +00:00

1035 lines
25 KiB
C
Raw Blame History

/*-
* 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 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 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("$FreeBSD$");
#include <sys/param.h>
#include <sys/bio.h>
#include <sys/kernel.h>
#include <sys/kthread.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <geom/geom.h>
#include <geom/vinum/geom_vinum_var.h>
#include <geom/vinum/geom_vinum.h>
#include <geom/vinum/geom_vinum_raid5.h>
SYSCTL_DECL(_kern_geom);
SYSCTL_NODE(_kern_geom, OID_AUTO, vinum, CTLFLAG_RW, 0, "GEOM_VINUM stuff");
u_int g_vinum_debug = 0;
TUNABLE_INT("kern.geom.vinum.debug", &g_vinum_debug);
SYSCTL_UINT(_kern_geom_vinum, OID_AUTO, debug, CTLFLAG_RW, &g_vinum_debug, 0,
"Debug level");
static int gv_create(struct g_geom *, struct gctl_req *);
static void gv_attach(struct gv_softc *, struct gctl_req *);
static void gv_detach(struct gv_softc *, struct gctl_req *);
static void gv_parityop(struct gv_softc *, struct gctl_req *);
static void
gv_orphan(struct g_consumer *cp)
{
struct g_geom *gp;
struct gv_softc *sc;
struct gv_drive *d;
g_topology_assert();
KASSERT(cp != NULL, ("gv_orphan: null cp"));
gp = cp->geom;
KASSERT(gp != NULL, ("gv_orphan: null gp"));
sc = gp->softc;
KASSERT(sc != NULL, ("gv_orphan: null sc"));
d = cp->private;
KASSERT(d != NULL, ("gv_orphan: null d"));
g_trace(G_T_TOPOLOGY, "gv_orphan(%s)", gp->name);
gv_post_event(sc, GV_EVENT_DRIVE_LOST, d, NULL, 0, 0);
}
void
gv_start(struct bio *bp)
{
struct g_geom *gp;
struct gv_softc *sc;
gp = bp->bio_to->geom;
sc = gp->softc;
switch (bp->bio_cmd) {
case BIO_READ:
case BIO_WRITE:
case BIO_DELETE:
break;
case BIO_GETATTR:
default:
g_io_deliver(bp, EOPNOTSUPP);
return;
}
mtx_lock(&sc->bqueue_mtx);
bioq_disksort(sc->bqueue_down, bp);
wakeup(sc);
mtx_unlock(&sc->bqueue_mtx);
}
void
gv_done(struct bio *bp)
{
struct g_geom *gp;
struct gv_softc *sc;
KASSERT(bp != NULL, ("NULL bp"));
gp = bp->bio_from->geom;
sc = gp->softc;
mtx_lock(&sc->bqueue_mtx);
bioq_disksort(sc->bqueue_up, bp);
wakeup(sc);
mtx_unlock(&sc->bqueue_mtx);
}
int
gv_access(struct g_provider *pp, int dr, int dw, int de)
{
struct g_geom *gp;
struct gv_softc *sc;
struct gv_drive *d, *d2;
int error;
error = ENXIO;
gp = pp->geom;
sc = gp->softc;
/*
* We want to modify the read count with the write count in case we have
* plexes in a RAID-5 organization.
*/
dr += dw;
LIST_FOREACH(d, &sc->drives, drive) {
if (d->consumer == NULL)
continue;
error = g_access(d->consumer, dr, dw, de);
if (error) {
LIST_FOREACH(d2, &sc->drives, drive) {
if (d == d2)
break;
g_access(d2->consumer, -dr, -dw, -de);
}
G_VINUM_DEBUG(0, "g_access '%s' failed: %d", d->name,
error);
return (error);
}
}
return (0);
}
static void
gv_init(struct g_class *mp)
{
struct g_geom *gp;
struct gv_softc *sc;
g_trace(G_T_TOPOLOGY, "gv_init(%p)", mp);
gp = g_new_geomf(mp, "VINUM");
gp->spoiled = gv_orphan;
gp->orphan = gv_orphan;
gp->access = gv_access;
gp->start = gv_start;
gp->softc = g_malloc(sizeof(struct gv_softc), M_WAITOK | M_ZERO);
sc = gp->softc;
sc->geom = gp;
sc->bqueue_down = g_malloc(sizeof(struct bio_queue_head),
M_WAITOK | M_ZERO);
sc->bqueue_up = g_malloc(sizeof(struct bio_queue_head),
M_WAITOK | M_ZERO);
bioq_init(sc->bqueue_down);
bioq_init(sc->bqueue_up);
LIST_INIT(&sc->drives);
LIST_INIT(&sc->subdisks);
LIST_INIT(&sc->plexes);
LIST_INIT(&sc->volumes);
TAILQ_INIT(&sc->equeue);
mtx_init(&sc->config_mtx, "gv_config", NULL, MTX_DEF);
mtx_init(&sc->equeue_mtx, "gv_equeue", NULL, MTX_DEF);
mtx_init(&sc->bqueue_mtx, "gv_bqueue", NULL, MTX_DEF);
kproc_create(gv_worker, sc, NULL, 0, 0, "gv_worker");
}
static int
gv_unload(struct gctl_req *req, struct g_class *mp, struct g_geom *gp)
{
struct gv_softc *sc;
g_trace(G_T_TOPOLOGY, "gv_unload(%p)", mp);
g_topology_assert();
sc = gp->softc;
if (sc != NULL) {
gv_post_event(sc, GV_EVENT_THREAD_EXIT, NULL, NULL, 0, 0);
gp->softc = NULL;
g_wither_geom(gp, ENXIO);
return (EAGAIN);
}
return (0);
}
/* Handle userland request of attaching object. */
static void
gv_attach(struct gv_softc *sc, struct gctl_req *req)
{
struct gv_volume *v;
struct gv_plex *p;
struct gv_sd *s;
off_t *offset;
int *rename, type_child, type_parent;
char *child, *parent;
child = gctl_get_param(req, "child", NULL);
if (child == NULL) {
gctl_error(req, "no child given");
return;
}
parent = gctl_get_param(req, "parent", NULL);
if (parent == NULL) {
gctl_error(req, "no parent given");
return;
}
offset = gctl_get_paraml(req, "offset", sizeof(*offset));
if (offset == NULL) {
gctl_error(req, "no offset given");
return;
}
rename = gctl_get_paraml(req, "rename", sizeof(*rename));
if (rename == NULL) {
gctl_error(req, "no rename flag given");
return;
}
type_child = gv_object_type(sc, child);
type_parent = gv_object_type(sc, parent);
switch (type_child) {
case GV_TYPE_PLEX:
if (type_parent != GV_TYPE_VOL) {
gctl_error(req, "no such volume to attach to");
return;
}
v = gv_find_vol(sc, parent);
p = gv_find_plex(sc, child);
gv_post_event(sc, GV_EVENT_ATTACH_PLEX, p, v, *offset, *rename);
break;
case GV_TYPE_SD:
if (type_parent != GV_TYPE_PLEX) {
gctl_error(req, "no such plex to attach to");
return;
}
p = gv_find_plex(sc, parent);
s = gv_find_sd(sc, child);
gv_post_event(sc, GV_EVENT_ATTACH_SD, s, p, *offset, *rename);
break;
default:
gctl_error(req, "invalid child type");
break;
}
}
/* Handle userland request of detaching object. */
static void
gv_detach(struct gv_softc *sc, struct gctl_req *req)
{
struct gv_plex *p;
struct gv_sd *s;
int *flags, type;
char *object;
object = gctl_get_param(req, "object", NULL);
if (object == NULL) {
gctl_error(req, "no argument given");
return;
}
flags = gctl_get_paraml(req, "flags", sizeof(*flags));
type = gv_object_type(sc, object);
switch (type) {
case GV_TYPE_PLEX:
p = gv_find_plex(sc, object);
gv_post_event(sc, GV_EVENT_DETACH_PLEX, p, NULL, *flags, 0);
break;
case GV_TYPE_SD:
s = gv_find_sd(sc, object);
gv_post_event(sc, GV_EVENT_DETACH_SD, s, NULL, *flags, 0);
break;
default:
gctl_error(req, "invalid object type");
break;
}
}
/* Handle userland requests for creating new objects. */
static int
gv_create(struct g_geom *gp, struct gctl_req *req)
{
struct gv_softc *sc;
struct gv_drive *d, *d2;
struct gv_plex *p, *p2;
struct gv_sd *s, *s2;
struct gv_volume *v, *v2;
struct g_provider *pp;
int error, i, *drives, *flags, *plexes, *subdisks, *volumes;
char buf[20];
g_topology_assert();
sc = gp->softc;
/* Find out how many of each object have been passed in. */
volumes = gctl_get_paraml(req, "volumes", sizeof(*volumes));
plexes = gctl_get_paraml(req, "plexes", sizeof(*plexes));
subdisks = gctl_get_paraml(req, "subdisks", sizeof(*subdisks));
drives = gctl_get_paraml(req, "drives", sizeof(*drives));
if (volumes == NULL || plexes == NULL || subdisks == NULL ||
drives == NULL) {
gctl_error(req, "number of objects not given");
return (-1);
}
flags = gctl_get_paraml(req, "flags", sizeof(*flags));
if (flags == NULL) {
gctl_error(req, "flags not given");
return (-1);
}
/* First, handle drive definitions ... */
for (i = 0; i < *drives; i++) {
snprintf(buf, sizeof(buf), "drive%d", i);
d2 = gctl_get_paraml(req, buf, sizeof(*d2));
if (d2 == NULL) {
gctl_error(req, "no drive definition given");
return (-1);
}
/*
* Make sure that the device specified in the drive config is
* an active GEOM provider.
*/
pp = g_provider_by_name(d2->device);
if (pp == NULL) {
gctl_error(req, "%s: device not found", d2->device);
goto error;
}
if (gv_find_drive(sc, d2->name) != NULL) {
/* Ignore error. */
if (*flags & GV_FLAG_F)
continue;
gctl_error(req, "drive '%s' already exists", d2->name);
goto error;
}
if (gv_find_drive_device(sc, d2->device) != NULL) {
gctl_error(req, "device '%s' already configured in "
"gvinum", d2->device);
goto error;
}
d = g_malloc(sizeof(*d), M_WAITOK | M_ZERO);
bcopy(d2, d, sizeof(*d));
gv_post_event(sc, GV_EVENT_CREATE_DRIVE, d, NULL, 0, 0);
}
/* ... then volume definitions ... */
for (i = 0; i < *volumes; i++) {
error = 0;
snprintf(buf, sizeof(buf), "volume%d", i);
v2 = gctl_get_paraml(req, buf, sizeof(*v2));
if (v2 == NULL) {
gctl_error(req, "no volume definition given");
return (-1);
}
if (gv_find_vol(sc, v2->name) != NULL) {
/* Ignore error. */
if (*flags & GV_FLAG_F)
continue;
gctl_error(req, "volume '%s' already exists", v2->name);
goto error;
}
v = g_malloc(sizeof(*v), M_WAITOK | M_ZERO);
bcopy(v2, v, sizeof(*v));
gv_post_event(sc, GV_EVENT_CREATE_VOLUME, v, NULL, 0, 0);
}
/* ... then plex definitions ... */
for (i = 0; i < *plexes; i++) {
error = 0;
snprintf(buf, sizeof(buf), "plex%d", i);
p2 = gctl_get_paraml(req, buf, sizeof(*p2));
if (p2 == NULL) {
gctl_error(req, "no plex definition given");
return (-1);
}
if (gv_find_plex(sc, p2->name) != NULL) {
/* Ignore error. */
if (*flags & GV_FLAG_F)
continue;
gctl_error(req, "plex '%s' already exists", p2->name);
goto error;
}
p = g_malloc(sizeof(*p), M_WAITOK | M_ZERO);
bcopy(p2, p, sizeof(*p));
gv_post_event(sc, GV_EVENT_CREATE_PLEX, p, NULL, 0, 0);
}
/* ... and, finally, subdisk definitions. */
for (i = 0; i < *subdisks; i++) {
error = 0;
snprintf(buf, sizeof(buf), "sd%d", i);
s2 = gctl_get_paraml(req, buf, sizeof(*s2));
if (s2 == NULL) {
gctl_error(req, "no subdisk definition given");
return (-1);
}
if (gv_find_sd(sc, s2->name) != NULL) {
/* Ignore error. */
if (*flags & GV_FLAG_F)
continue;
gctl_error(req, "sd '%s' already exists", s2->name);
goto error;
}
s = g_malloc(sizeof(*s), M_WAITOK | M_ZERO);
bcopy(s2, s, sizeof(*s));
gv_post_event(sc, GV_EVENT_CREATE_SD, s, NULL, 0, 0);
}
error:
gv_post_event(sc, GV_EVENT_SETUP_OBJECTS, sc, NULL, 0, 0);
gv_post_event(sc, GV_EVENT_SAVE_CONFIG, sc, NULL, 0, 0);
return (0);
}
static void
gv_config(struct gctl_req *req, struct g_class *mp, char const *verb)
{
struct g_geom *gp;
struct gv_softc *sc;
struct sbuf *sb;
char *comment;
g_topology_assert();
gp = LIST_FIRST(&mp->geom);
sc = gp->softc;
if (!strcmp(verb, "attach")) {
gv_attach(sc, req);
} else if (!strcmp(verb, "concat")) {
gv_concat(gp, req);
} else if (!strcmp(verb, "detach")) {
gv_detach(sc, req);
} else if (!strcmp(verb, "list")) {
gv_list(gp, req);
/* Save our configuration back to disk. */
} else if (!strcmp(verb, "saveconfig")) {
gv_post_event(sc, GV_EVENT_SAVE_CONFIG, sc, NULL, 0, 0);
/* Return configuration in string form. */
} else if (!strcmp(verb, "getconfig")) {
comment = gctl_get_param(req, "comment", NULL);
if (comment == NULL) {
gctl_error(req, "no comment parameter given");
return;
}
sb = sbuf_new(NULL, NULL, GV_CFG_LEN, SBUF_FIXEDLEN);
gv_format_config(sc, sb, 0, comment);
sbuf_finish(sb);
gctl_set_param(req, "config", sbuf_data(sb), sbuf_len(sb) + 1);
sbuf_delete(sb);
} else if (!strcmp(verb, "create")) {
gv_create(gp, req);
} else if (!strcmp(verb, "mirror")) {
gv_mirror(gp, req);
} else if (!strcmp(verb, "move")) {
gv_move(gp, req);
} else if (!strcmp(verb, "raid5")) {
gv_raid5(gp, req);
} else if (!strcmp(verb, "rebuildparity") ||
!strcmp(verb, "checkparity")) {
gv_parityop(sc, req);
} else if (!strcmp(verb, "remove")) {
gv_remove(gp, req);
} else if (!strcmp(verb, "rename")) {
gv_rename(gp, req);
} else if (!strcmp(verb, "resetconfig")) {
gv_post_event(sc, GV_EVENT_RESET_CONFIG, sc, NULL, 0, 0);
} else if (!strcmp(verb, "start")) {
gv_start_obj(gp, req);
} else if (!strcmp(verb, "stripe")) {
gv_stripe(gp, req);
} else if (!strcmp(verb, "setstate")) {
gv_setstate(gp, req);
} else
gctl_error(req, "Unknown verb parameter");
}
static void
gv_parityop(struct gv_softc *sc, struct gctl_req *req)
{
struct gv_plex *p;
int *flags, *rebuild, type;
char *plex;
plex = gctl_get_param(req, "plex", NULL);
if (plex == NULL) {
gctl_error(req, "no plex given");
return;
}
flags = gctl_get_paraml(req, "flags", sizeof(*flags));
if (flags == NULL) {
gctl_error(req, "no flags given");
return;
}
rebuild = gctl_get_paraml(req, "rebuild", sizeof(*rebuild));
if (rebuild == NULL) {
gctl_error(req, "no operation given");
return;
}
type = gv_object_type(sc, plex);
if (type != GV_TYPE_PLEX) {
gctl_error(req, "'%s' is not a plex", plex);
return;
}
p = gv_find_plex(sc, plex);
if (p->state != GV_PLEX_UP) {
gctl_error(req, "plex %s is not completely accessible",
p->name);
return;
}
if (p->org != GV_PLEX_RAID5) {
gctl_error(req, "plex %s is not a RAID5 plex", p->name);
return;
}
/* Put it in the event queue. */
/* XXX: The state of the plex might have changed when this event is
* picked up ... We should perhaps check this afterwards. */
if (*rebuild)
gv_post_event(sc, GV_EVENT_PARITY_REBUILD, p, NULL, 0, 0);
else
gv_post_event(sc, GV_EVENT_PARITY_CHECK, p, NULL, 0, 0);
}
static struct g_geom *
gv_taste(struct g_class *mp, struct g_provider *pp, int flags __unused)
{
struct g_geom *gp;
struct g_consumer *cp;
struct gv_softc *sc;
struct gv_hdr vhdr;
int error;
g_topology_assert();
g_trace(G_T_TOPOLOGY, "gv_taste(%s, %s)", mp->name, pp->name);
gp = LIST_FIRST(&mp->geom);
if (gp == NULL) {
G_VINUM_DEBUG(0, "error: tasting, but not initialized?");
return (NULL);
}
sc = gp->softc;
cp = g_new_consumer(gp);
if (g_attach(cp, pp) != 0) {
g_destroy_consumer(cp);
return (NULL);
}
if (g_access(cp, 1, 0, 0) != 0) {
g_detach(cp);
g_destroy_consumer(cp);
return (NULL);
}
g_topology_unlock();
error = gv_read_header(cp, &vhdr);
g_topology_lock();
g_access(cp, -1, 0, 0);
g_detach(cp);
g_destroy_consumer(cp);
/* Check if what we've been given is a valid vinum drive. */
if (!error)
gv_post_event(sc, GV_EVENT_DRIVE_TASTED, pp, NULL, 0, 0);
return (NULL);
}
void
gv_worker(void *arg)
{
struct g_provider *pp;
struct gv_softc *sc;
struct gv_event *ev;
struct gv_volume *v;
struct gv_plex *p;
struct gv_sd *s;
struct gv_drive *d;
struct bio *bp;
int newstate, flags, err, rename;
char *newname;
off_t offset;
sc = arg;
KASSERT(sc != NULL, ("NULL sc"));
for (;;) {
/* Look at the events first... */
ev = gv_get_event(sc);
if (ev != NULL) {
gv_remove_event(sc, ev);
switch (ev->type) {
case GV_EVENT_DRIVE_TASTED:
G_VINUM_DEBUG(2, "event 'drive tasted'");
pp = ev->arg1;
gv_drive_tasted(sc, pp);
break;
case GV_EVENT_DRIVE_LOST:
G_VINUM_DEBUG(2, "event 'drive lost'");
d = ev->arg1;
gv_drive_lost(sc, d);
break;
case GV_EVENT_CREATE_DRIVE:
G_VINUM_DEBUG(2, "event 'create drive'");
d = ev->arg1;
gv_create_drive(sc, d);
break;
case GV_EVENT_CREATE_VOLUME:
G_VINUM_DEBUG(2, "event 'create volume'");
v = ev->arg1;
gv_create_volume(sc, v);
break;
case GV_EVENT_CREATE_PLEX:
G_VINUM_DEBUG(2, "event 'create plex'");
p = ev->arg1;
gv_create_plex(sc, p);
break;
case GV_EVENT_CREATE_SD:
G_VINUM_DEBUG(2, "event 'create sd'");
s = ev->arg1;
gv_create_sd(sc, s);
break;
case GV_EVENT_RM_DRIVE:
G_VINUM_DEBUG(2, "event 'remove drive'");
d = ev->arg1;
flags = ev->arg3;
gv_rm_drive(sc, d, flags);
/*gv_setup_objects(sc);*/
break;
case GV_EVENT_RM_VOLUME:
G_VINUM_DEBUG(2, "event 'remove volume'");
v = ev->arg1;
gv_rm_vol(sc, v);
/*gv_setup_objects(sc);*/
break;
case GV_EVENT_RM_PLEX:
G_VINUM_DEBUG(2, "event 'remove plex'");
p = ev->arg1;
gv_rm_plex(sc, p);
/*gv_setup_objects(sc);*/
break;
case GV_EVENT_RM_SD:
G_VINUM_DEBUG(2, "event 'remove sd'");
s = ev->arg1;
gv_rm_sd(sc, s);
/*gv_setup_objects(sc);*/
break;
case GV_EVENT_SAVE_CONFIG:
G_VINUM_DEBUG(2, "event 'save config'");
gv_save_config(sc);
break;
case GV_EVENT_SET_SD_STATE:
G_VINUM_DEBUG(2, "event 'setstate sd'");
s = ev->arg1;
newstate = ev->arg3;
flags = ev->arg4;
err = gv_set_sd_state(s, newstate, flags);
if (err)
G_VINUM_DEBUG(0, "error setting subdisk"
" state: error code %d", err);
break;
case GV_EVENT_SET_DRIVE_STATE:
G_VINUM_DEBUG(2, "event 'setstate drive'");
d = ev->arg1;
newstate = ev->arg3;
flags = ev->arg4;
err = gv_set_drive_state(d, newstate, flags);
if (err)
G_VINUM_DEBUG(0, "error setting drive "
"state: error code %d", err);
break;
case GV_EVENT_SET_VOL_STATE:
G_VINUM_DEBUG(2, "event 'setstate volume'");
v = ev->arg1;
newstate = ev->arg3;
flags = ev->arg4;
err = gv_set_vol_state(v, newstate, flags);
if (err)
G_VINUM_DEBUG(0, "error setting volume "
"state: error code %d", err);
break;
case GV_EVENT_SET_PLEX_STATE:
G_VINUM_DEBUG(2, "event 'setstate plex'");
p = ev->arg1;
newstate = ev->arg3;
flags = ev->arg4;
err = gv_set_plex_state(p, newstate, flags);
if (err)
G_VINUM_DEBUG(0, "error setting plex "
"state: error code %d", err);
break;
case GV_EVENT_SETUP_OBJECTS:
G_VINUM_DEBUG(2, "event 'setup objects'");
gv_setup_objects(sc);
break;
case GV_EVENT_RESET_CONFIG:
G_VINUM_DEBUG(2, "event 'resetconfig'");
err = gv_resetconfig(sc);
if (err)
G_VINUM_DEBUG(0, "error resetting "
"config: error code %d", err);
break;
case GV_EVENT_PARITY_REBUILD:
/*
* Start the rebuild. The gv_plex_done will
* handle issuing of the remaining rebuild bio's
* until it's finished.
*/
G_VINUM_DEBUG(2, "event 'rebuild'");
p = ev->arg1;
if (p->state != GV_PLEX_UP) {
G_VINUM_DEBUG(0, "plex %s is not "
"completely accessible", p->name);
break;
}
p->synced = 0;
g_topology_assert_not();
g_topology_lock();
err = gv_access(p->vol_sc->provider, 1, 1, 0);
if (err) {
G_VINUM_DEBUG(0, "unable to access "
"provider");
break;
}
g_topology_unlock();
gv_parity_request(p, GV_BIO_CHECK |
GV_BIO_PARITY, 0);
break;
case GV_EVENT_PARITY_CHECK:
/* Start parity check. */
G_VINUM_DEBUG(2, "event 'check'");
p = ev->arg1;
if (p->state != GV_PLEX_UP) {
G_VINUM_DEBUG(0, "plex %s is not "
"completely accessible", p->name);
break;
}
p->synced = 0;
g_topology_assert_not();
g_topology_lock();
err = gv_access(p->vol_sc->provider, 1, 1, 0);
if (err) {
G_VINUM_DEBUG(0, "unable to access "
"provider");
break;
}
g_topology_unlock();
gv_parity_request(p, GV_BIO_CHECK, 0);
break;
case GV_EVENT_START_PLEX:
G_VINUM_DEBUG(2, "event 'start' plex");
p = ev->arg1;
gv_start_plex(p);
break;
case GV_EVENT_START_VOLUME:
G_VINUM_DEBUG(2, "event 'start' volume");
v = ev->arg1;
gv_start_vol(v);
break;
case GV_EVENT_ATTACH_PLEX:
G_VINUM_DEBUG(2, "event 'attach' plex");
p = ev->arg1;
v = ev->arg2;
rename = ev->arg4;
err = gv_attach_plex(p, v, rename);
if (err)
G_VINUM_DEBUG(0, "error attaching %s to"
" %s: error code %d", p->name,
v->name, err);
break;
case GV_EVENT_ATTACH_SD:
G_VINUM_DEBUG(2, "event 'attach' sd");
s = ev->arg1;
p = ev->arg2;
offset = ev->arg3;
rename = ev->arg4;
err = gv_attach_sd(s, p, offset, rename);
if (err)
G_VINUM_DEBUG(0, "error attaching %s to"
" %s: error code %d", s->name,
p->name, err);
break;
case GV_EVENT_DETACH_PLEX:
G_VINUM_DEBUG(2, "event 'detach' plex");
p = ev->arg1;
flags = ev->arg3;
err = gv_detach_plex(p, flags);
if (err)
G_VINUM_DEBUG(0, "error detaching %s: "
"error code %d", p->name, err);
break;
case GV_EVENT_DETACH_SD:
G_VINUM_DEBUG(2, "event 'detach' sd");
s = ev->arg1;
flags = ev->arg3;
err = gv_detach_sd(s, flags);
if (err)
G_VINUM_DEBUG(0, "error detaching %s: "
"error code %d", s->name, err);
break;
case GV_EVENT_RENAME_VOL:
G_VINUM_DEBUG(2, "event 'rename' volume");
v = ev->arg1;
newname = ev->arg2;
flags = ev->arg3;
err = gv_rename_vol(sc, v, newname, flags);
if (err)
G_VINUM_DEBUG(0, "error renaming %s to "
"%s: error code %d", v->name,
newname, err);
g_free(newname);
/* Destroy and recreate the provider if we can. */
if (gv_provider_is_open(v->provider)) {
G_VINUM_DEBUG(0, "unable to rename "
"provider to %s: provider in use",
v->name);
break;
}
g_topology_lock();
g_wither_provider(v->provider, ENOENT);
g_topology_unlock();
v->provider = NULL;
gv_post_event(sc, GV_EVENT_SETUP_OBJECTS, sc,
NULL, 0, 0);
break;
case GV_EVENT_RENAME_PLEX:
G_VINUM_DEBUG(2, "event 'rename' plex");
p = ev->arg1;
newname = ev->arg2;
flags = ev->arg3;
err = gv_rename_plex(sc, p, newname, flags);
if (err)
G_VINUM_DEBUG(0, "error renaming %s to "
"%s: error code %d", p->name,
newname, err);
g_free(newname);
break;
case GV_EVENT_RENAME_SD:
G_VINUM_DEBUG(2, "event 'rename' sd");
s = ev->arg1;
newname = ev->arg2;
flags = ev->arg3;
err = gv_rename_sd(sc, s, newname, flags);
if (err)
G_VINUM_DEBUG(0, "error renaming %s to "
"%s: error code %d", s->name,
newname, err);
g_free(newname);
break;
case GV_EVENT_RENAME_DRIVE:
G_VINUM_DEBUG(2, "event 'rename' drive");
d = ev->arg1;
newname = ev->arg2;
flags = ev->arg3;
err = gv_rename_drive(sc, d, newname, flags);
if (err)
G_VINUM_DEBUG(0, "error renaming %s to "
"%s: error code %d", d->name,
newname, err);
g_free(newname);
break;
case GV_EVENT_MOVE_SD:
G_VINUM_DEBUG(2, "event 'move' sd");
s = ev->arg1;
d = ev->arg2;
flags = ev->arg3;
err = gv_move_sd(sc, s, d, flags);
if (err)
G_VINUM_DEBUG(0, "error moving %s to "
"%s: error code %d", s->name,
d->name, err);
break;
case GV_EVENT_THREAD_EXIT:
G_VINUM_DEBUG(2, "event 'thread exit'");
g_free(ev);
mtx_lock(&sc->equeue_mtx);
mtx_lock(&sc->bqueue_mtx);
gv_cleanup(sc);
mtx_destroy(&sc->bqueue_mtx);
mtx_destroy(&sc->equeue_mtx);
g_free(sc->bqueue_down);
g_free(sc->bqueue_up);
g_free(sc);
kproc_exit(ENXIO);
break; /* not reached */
default:
G_VINUM_DEBUG(1, "unknown event %d", ev->type);
}
g_free(ev);
continue;
}
/* ... then do I/O processing. */
mtx_lock(&sc->bqueue_mtx);
/* First do new requests. */
bp = bioq_takefirst(sc->bqueue_down);
if (bp != NULL) {
mtx_unlock(&sc->bqueue_mtx);
/* A bio that interfered with another bio. */
if (bp->bio_pflags & GV_BIO_ONHOLD) {
s = bp->bio_caller1;
p = s->plex_sc;
/* Is it still locked out? */
if (gv_stripe_active(p, bp)) {
/* Park the bio on the waiting queue. */
bioq_disksort(p->wqueue, bp);
} else {
bp->bio_pflags &= ~GV_BIO_ONHOLD;
g_io_request(bp, s->drive_sc->consumer);
}
/* A special request requireing special handling. */
} else if (bp->bio_pflags & GV_BIO_INTERNAL) {
p = bp->bio_caller1;
gv_plex_start(p, bp);
} else {
gv_volume_start(sc, bp);
}
mtx_lock(&sc->bqueue_mtx);
}
/* Then do completed requests. */
bp = bioq_takefirst(sc->bqueue_up);
if (bp == NULL) {
msleep(sc, &sc->bqueue_mtx, PRIBIO, "-", hz/10);
mtx_unlock(&sc->bqueue_mtx);
continue;
}
mtx_unlock(&sc->bqueue_mtx);
gv_bio_done(sc, bp);
}
}
#define VINUM_CLASS_NAME "VINUM"
static struct g_class g_vinum_class = {
.name = VINUM_CLASS_NAME,
.version = G_VERSION,
.init = gv_init,
.taste = gv_taste,
.ctlreq = gv_config,
.destroy_geom = gv_unload,
};
DECLARE_GEOM_CLASS(g_vinum_class, g_vinum);
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