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281fb05e83
freebsd/sys/geom/vinum/geom_vinum.c
Jaakko Heinonen 3535526b15 - Don't return EAGAIN from gv_unload(). It was used to work around the 
deadlock fixed in r207671.
- Wait for worker process to exit at class unload. The worker process
  was not guaranteed to exit before the linker unloaded the module.
- Use 0 as the worker process exit status instead of ENXIO and style
  the NOTREACHED comment.

Reviewed by:	lulf
X-MFC after:	r207671
2010-05-10 19:12:23 +00:00

1048 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;
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, &sc->worker, 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_worker_exit(sc);
gp->softc = NULL;
g_wither_geom(gp, ENXIO);
}
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;
}
if (p->flags & GV_PLEX_SYNCING ||
p->flags & GV_PLEX_REBUILDING ||
p->flags & GV_PLEX_GROWING) {
G_VINUM_DEBUG(0, "plex %s is busy with "
"syncing or parity build", p->name);
break;
}
p->synced = 0;
p->flags |= GV_PLEX_REBUILDING;
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;
}
if (p->flags & GV_PLEX_SYNCING ||
p->flags & GV_PLEX_REBUILDING ||
p->flags & GV_PLEX_GROWING) {
G_VINUM_DEBUG(0, "plex %s is busy with "
"syncing or parity build", 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(0);
/* NOTREACHED */
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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