| Current Path : /usr/src/sys/geom/raid3/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/sys/geom/raid3/g_raid3_ctl.c |
/*-
* Copyright (c) 2004-2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/geom/raid3/g_raid3_ctl.c 163888 2006-11-01 22:51:49Z pjd $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/bio.h>
#include <sys/sysctl.h>
#include <sys/malloc.h>
#include <sys/bitstring.h>
#include <vm/uma.h>
#include <machine/atomic.h>
#include <geom/geom.h>
#include <sys/proc.h>
#include <sys/kthread.h>
#include <geom/raid3/g_raid3.h>
static struct g_raid3_softc *
g_raid3_find_device(struct g_class *mp, const char *name)
{
struct g_raid3_softc *sc;
struct g_geom *gp;
g_topology_lock();
LIST_FOREACH(gp, &mp->geom, geom) {
sc = gp->softc;
if (sc == NULL)
continue;
if ((sc->sc_flags & G_RAID3_DEVICE_FLAG_DESTROY) != 0)
continue;
if (strcmp(gp->name, name) == 0 ||
strcmp(sc->sc_name, name) == 0) {
g_topology_unlock();
sx_xlock(&sc->sc_lock);
return (sc);
}
}
g_topology_unlock();
return (NULL);
}
static struct g_raid3_disk *
g_raid3_find_disk(struct g_raid3_softc *sc, const char *name)
{
struct g_raid3_disk *disk;
u_int n;
sx_assert(&sc->sc_lock, SX_XLOCKED);
if (strncmp(name, "/dev/", 5) == 0)
name += 5;
for (n = 0; n < sc->sc_ndisks; n++) {
disk = &sc->sc_disks[n];
if (disk->d_state == G_RAID3_DISK_STATE_NODISK)
continue;
if (disk->d_consumer == NULL)
continue;
if (disk->d_consumer->provider == NULL)
continue;
if (strcmp(disk->d_consumer->provider->name, name) == 0)
return (disk);
}
return (NULL);
}
static void
g_raid3_ctl_configure(struct gctl_req *req, struct g_class *mp)
{
struct g_raid3_softc *sc;
struct g_raid3_disk *disk;
const char *name;
int *nargs, do_sync = 0, dirty = 1;
int *autosync, *noautosync;
int *failsync, *nofailsync;
int *round_robin, *noround_robin;
int *verify, *noverify;
u_int n;
nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
if (nargs == NULL) {
gctl_error(req, "No '%s' argument.", "nargs");
return;
}
if (*nargs != 1) {
gctl_error(req, "Invalid number of arguments.");
return;
}
autosync = gctl_get_paraml(req, "autosync", sizeof(*autosync));
if (autosync == NULL) {
gctl_error(req, "No '%s' argument.", "autosync");
return;
}
noautosync = gctl_get_paraml(req, "noautosync", sizeof(*noautosync));
if (noautosync == NULL) {
gctl_error(req, "No '%s' argument.", "noautosync");
return;
}
if (*autosync && *noautosync) {
gctl_error(req, "'%s' and '%s' specified.", "autosync",
"noautosync");
return;
}
failsync = gctl_get_paraml(req, "failsync", sizeof(*failsync));
if (failsync == NULL) {
gctl_error(req, "No '%s' argument.", "failsync");
return;
}
nofailsync = gctl_get_paraml(req, "nofailsync", sizeof(*nofailsync));
if (nofailsync == NULL) {
gctl_error(req, "No '%s' argument.", "nofailsync");
return;
}
if (*failsync && *nofailsync) {
gctl_error(req, "'%s' and '%s' specified.", "failsync",
"nofailsync");
return;
}
round_robin = gctl_get_paraml(req, "round_robin", sizeof(*round_robin));
if (round_robin == NULL) {
gctl_error(req, "No '%s' argument.", "round_robin");
return;
}
noround_robin = gctl_get_paraml(req, "noround_robin",
sizeof(*noround_robin));
if (noround_robin == NULL) {
gctl_error(req, "No '%s' argument.", "noround_robin");
return;
}
if (*round_robin && *noround_robin) {
gctl_error(req, "'%s' and '%s' specified.", "round_robin",
"noround_robin");
return;
}
verify = gctl_get_paraml(req, "verify", sizeof(*verify));
if (verify == NULL) {
gctl_error(req, "No '%s' argument.", "verify");
return;
}
noverify = gctl_get_paraml(req, "noverify", sizeof(*noverify));
if (noverify == NULL) {
gctl_error(req, "No '%s' argument.", "noverify");
return;
}
if (*verify && *noverify) {
gctl_error(req, "'%s' and '%s' specified.", "verify",
"noverify");
return;
}
if (!*autosync && !*noautosync && !*failsync && !*nofailsync &&
!*round_robin && !*noround_robin && !*verify && !*noverify) {
gctl_error(req, "Nothing has changed.");
return;
}
name = gctl_get_asciiparam(req, "arg0");
if (name == NULL) {
gctl_error(req, "No 'arg%u' argument.", 0);
return;
}
sc = g_raid3_find_device(mp, name);
if (sc == NULL) {
gctl_error(req, "No such device: %s.", name);
return;
}
if (g_raid3_ndisks(sc, -1) < sc->sc_ndisks) {
gctl_error(req, "Not all disks connected.");
sx_xunlock(&sc->sc_lock);
return;
}
if ((sc->sc_flags & G_RAID3_DEVICE_FLAG_NOAUTOSYNC) != 0) {
if (*autosync) {
sc->sc_flags &= ~G_RAID3_DEVICE_FLAG_NOAUTOSYNC;
do_sync = 1;
}
} else {
if (*noautosync)
sc->sc_flags |= G_RAID3_DEVICE_FLAG_NOAUTOSYNC;
}
if ((sc->sc_flags & G_RAID3_DEVICE_FLAG_NOFAILSYNC) != 0) {
if (*failsync)
sc->sc_flags &= ~G_RAID3_DEVICE_FLAG_NOFAILSYNC;
} else {
if (*nofailsync) {
sc->sc_flags |= G_RAID3_DEVICE_FLAG_NOFAILSYNC;
dirty = 0;
}
}
if ((sc->sc_flags & G_RAID3_DEVICE_FLAG_VERIFY) != 0) {
if (*noverify)
sc->sc_flags &= ~G_RAID3_DEVICE_FLAG_VERIFY;
} else {
if (*verify)
sc->sc_flags |= G_RAID3_DEVICE_FLAG_VERIFY;
}
if ((sc->sc_flags & G_RAID3_DEVICE_FLAG_ROUND_ROBIN) != 0) {
if (*noround_robin)
sc->sc_flags &= ~G_RAID3_DEVICE_FLAG_ROUND_ROBIN;
} else {
if (*round_robin)
sc->sc_flags |= G_RAID3_DEVICE_FLAG_ROUND_ROBIN;
}
if ((sc->sc_flags & G_RAID3_DEVICE_FLAG_VERIFY) != 0 &&
(sc->sc_flags & G_RAID3_DEVICE_FLAG_ROUND_ROBIN) != 0) {
/*
* VERIFY and ROUND-ROBIN options are mutally exclusive.
*/
sc->sc_flags &= ~G_RAID3_DEVICE_FLAG_ROUND_ROBIN;
}
for (n = 0; n < sc->sc_ndisks; n++) {
disk = &sc->sc_disks[n];
if (do_sync) {
if (disk->d_state == G_RAID3_DISK_STATE_SYNCHRONIZING)
disk->d_flags &= ~G_RAID3_DISK_FLAG_FORCE_SYNC;
}
if (!dirty)
disk->d_flags &= ~G_RAID3_DISK_FLAG_DIRTY;
g_raid3_update_metadata(disk);
if (do_sync) {
if (disk->d_state == G_RAID3_DISK_STATE_STALE) {
/*
* XXX: This is probably possible that this
* component will not be retasted.
*/
g_raid3_event_send(disk,
G_RAID3_DISK_STATE_DISCONNECTED,
G_RAID3_EVENT_DONTWAIT);
}
}
}
sx_xunlock(&sc->sc_lock);
}
static void
g_raid3_ctl_rebuild(struct gctl_req *req, struct g_class *mp)
{
struct g_raid3_metadata md;
struct g_raid3_softc *sc;
struct g_raid3_disk *disk;
struct g_provider *pp;
const char *name;
int error, *nargs;
nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
if (nargs == NULL) {
gctl_error(req, "No '%s' argument.", "nargs");
return;
}
if (*nargs != 2) {
gctl_error(req, "Invalid number of arguments.");
return;
}
name = gctl_get_asciiparam(req, "arg0");
if (name == NULL) {
gctl_error(req, "No 'arg%u' argument.", 0);
return;
}
sc = g_raid3_find_device(mp, name);
if (sc == NULL) {
gctl_error(req, "No such device: %s.", name);
return;
}
name = gctl_get_asciiparam(req, "arg1");
if (name == NULL) {
gctl_error(req, "No 'arg%u' argument.", 1);
sx_xunlock(&sc->sc_lock);
return;
}
disk = g_raid3_find_disk(sc, name);
if (disk == NULL) {
gctl_error(req, "No such provider: %s.", name);
sx_xunlock(&sc->sc_lock);
return;
}
if (disk->d_state == G_RAID3_DISK_STATE_ACTIVE &&
g_raid3_ndisks(sc, G_RAID3_DISK_STATE_ACTIVE) < sc->sc_ndisks) {
gctl_error(req, "There is one stale disk already.");
sx_xunlock(&sc->sc_lock);
return;
}
/*
* Do rebuild by resetting syncid and disconnecting disk.
* It'll be retasted, connected to the device and synchronized.
*/
disk->d_sync.ds_syncid = 0;
if ((sc->sc_flags & G_RAID3_DEVICE_FLAG_NOAUTOSYNC) != 0)
disk->d_flags |= G_RAID3_DISK_FLAG_FORCE_SYNC;
g_raid3_update_metadata(disk);
pp = disk->d_consumer->provider;
g_topology_lock();
error = g_raid3_read_metadata(disk->d_consumer, &md);
g_topology_unlock();
g_raid3_event_send(disk, G_RAID3_DISK_STATE_DISCONNECTED,
G_RAID3_EVENT_WAIT);
if (error != 0) {
gctl_error(req, "Cannot read metadata from %s.", pp->name);
sx_xunlock(&sc->sc_lock);
return;
}
error = g_raid3_add_disk(sc, pp, &md);
if (error != 0)
gctl_error(req, "Cannot reconnect component %s.", pp->name);
sx_xunlock(&sc->sc_lock);
}
static void
g_raid3_ctl_stop(struct gctl_req *req, struct g_class *mp)
{
struct g_raid3_softc *sc;
int *force, *nargs, error;
const char *name;
char param[16];
u_int i;
int how;
nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
if (nargs == NULL) {
gctl_error(req, "No '%s' argument.", "nargs");
return;
}
if (*nargs < 1) {
gctl_error(req, "Missing device(s).");
return;
}
force = gctl_get_paraml(req, "force", sizeof(*force));
if (force == NULL) {
gctl_error(req, "No '%s' argument.", "force");
return;
}
if (*force)
how = G_RAID3_DESTROY_HARD;
else
how = G_RAID3_DESTROY_SOFT;
for (i = 0; i < (u_int)*nargs; i++) {
snprintf(param, sizeof(param), "arg%u", i);
name = gctl_get_asciiparam(req, param);
if (name == NULL) {
gctl_error(req, "No 'arg%u' argument.", i);
return;
}
sc = g_raid3_find_device(mp, name);
if (sc == NULL) {
gctl_error(req, "No such device: %s.", name);
return;
}
g_cancel_event(sc);
error = g_raid3_destroy(sc, how);
if (error != 0) {
gctl_error(req, "Cannot destroy device %s (error=%d).",
sc->sc_geom->name, error);
sx_xunlock(&sc->sc_lock);
return;
}
/* No need to unlock, because lock is already dead. */
}
}
static void
g_raid3_ctl_insert_orphan(struct g_consumer *cp)
{
KASSERT(1 == 0, ("%s called while inserting %s.", __func__,
cp->provider->name));
}
static void
g_raid3_ctl_insert(struct gctl_req *req, struct g_class *mp)
{
struct g_raid3_metadata md;
struct g_raid3_softc *sc;
struct g_raid3_disk *disk;
struct g_geom *gp;
struct g_provider *pp;
struct g_consumer *cp;
const char *name;
u_char *sector;
off_t compsize;
intmax_t *no;
int *hardcode, *nargs, error;
nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
if (nargs == NULL) {
gctl_error(req, "No '%s' argument.", "nargs");
return;
}
if (*nargs != 2) {
gctl_error(req, "Invalid number of arguments.");
return;
}
hardcode = gctl_get_paraml(req, "hardcode", sizeof(*hardcode));
if (hardcode == NULL) {
gctl_error(req, "No '%s' argument.", "hardcode");
return;
}
name = gctl_get_asciiparam(req, "arg1");
if (name == NULL) {
gctl_error(req, "No 'arg%u' argument.", 1);
return;
}
no = gctl_get_paraml(req, "number", sizeof(*no));
if (no == NULL) {
gctl_error(req, "No '%s' argument.", "no");
return;
}
if (strncmp(name, "/dev/", 5) == 0)
name += 5;
g_topology_lock();
pp = g_provider_by_name(name);
if (pp == NULL) {
g_topology_unlock();
gctl_error(req, "Invalid provider.");
return;
}
gp = g_new_geomf(mp, "raid3:insert");
gp->orphan = g_raid3_ctl_insert_orphan;
cp = g_new_consumer(gp);
error = g_attach(cp, pp);
if (error != 0) {
g_topology_unlock();
gctl_error(req, "Cannot attach to %s.", pp->name);
goto end;
}
error = g_access(cp, 0, 1, 1);
if (error != 0) {
g_topology_unlock();
gctl_error(req, "Cannot access %s.", pp->name);
goto end;
}
g_topology_unlock();
name = gctl_get_asciiparam(req, "arg0");
if (name == NULL) {
gctl_error(req, "No 'arg%u' argument.", 0);
goto end;
}
sc = g_raid3_find_device(mp, name);
if (sc == NULL) {
gctl_error(req, "No such device: %s.", name);
goto end;
}
if (*no >= sc->sc_ndisks) {
sx_xunlock(&sc->sc_lock);
gctl_error(req, "Invalid component number.");
goto end;
}
disk = &sc->sc_disks[*no];
if (disk->d_state != G_RAID3_DISK_STATE_NODISK) {
sx_xunlock(&sc->sc_lock);
gctl_error(req, "Component %jd is already connected.", *no);
goto end;
}
if (((sc->sc_sectorsize / (sc->sc_ndisks - 1)) % pp->sectorsize) != 0) {
sx_xunlock(&sc->sc_lock);
gctl_error(req,
"Cannot insert provider %s, because of its sector size.",
pp->name);
goto end;
}
compsize = sc->sc_mediasize / (sc->sc_ndisks - 1);
if (compsize > pp->mediasize - pp->sectorsize) {
sx_xunlock(&sc->sc_lock);
gctl_error(req, "Provider %s too small.", pp->name);
goto end;
}
if (compsize < pp->mediasize - pp->sectorsize) {
gctl_error(req,
"warning: %s: only %jd bytes from %jd bytes used.",
pp->name, (intmax_t)compsize,
(intmax_t)(pp->mediasize - pp->sectorsize));
}
g_raid3_fill_metadata(disk, &md);
sx_xunlock(&sc->sc_lock);
md.md_syncid = 0;
md.md_dflags = 0;
if (*hardcode)
strlcpy(md.md_provider, pp->name, sizeof(md.md_provider));
else
bzero(md.md_provider, sizeof(md.md_provider));
md.md_provsize = pp->mediasize;
sector = g_malloc(pp->sectorsize, M_WAITOK);
raid3_metadata_encode(&md, sector);
error = g_write_data(cp, pp->mediasize - pp->sectorsize, sector,
pp->sectorsize);
g_free(sector);
if (error != 0)
gctl_error(req, "Cannot store metadata on %s.", pp->name);
end:
g_topology_lock();
if (cp->acw > 0)
g_access(cp, 0, -1, -1);
if (cp->provider != NULL)
g_detach(cp);
g_destroy_consumer(cp);
g_destroy_geom(gp);
g_topology_unlock();
}
static void
g_raid3_ctl_remove(struct gctl_req *req, struct g_class *mp)
{
struct g_raid3_softc *sc;
struct g_raid3_disk *disk;
const char *name;
intmax_t *no;
int *nargs;
nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
if (nargs == NULL) {
gctl_error(req, "No '%s' argument.", "nargs");
return;
}
if (*nargs != 1) {
gctl_error(req, "Invalid number of arguments.");
return;
}
no = gctl_get_paraml(req, "number", sizeof(*no));
if (no == NULL) {
gctl_error(req, "No '%s' argument.", "no");
return;
}
name = gctl_get_asciiparam(req, "arg0");
if (name == NULL) {
gctl_error(req, "No 'arg%u' argument.", 0);
return;
}
sc = g_raid3_find_device(mp, name);
if (sc == NULL) {
gctl_error(req, "No such device: %s.", name);
return;
}
if (*no >= sc->sc_ndisks) {
sx_xunlock(&sc->sc_lock);
gctl_error(req, "Invalid component number.");
return;
}
disk = &sc->sc_disks[*no];
switch (disk->d_state) {
case G_RAID3_DISK_STATE_ACTIVE:
/*
* When replacing ACTIVE component, all the rest has to be also
* ACTIVE.
*/
if (g_raid3_ndisks(sc, G_RAID3_DISK_STATE_ACTIVE) <
sc->sc_ndisks) {
gctl_error(req, "Cannot replace component number %jd.",
*no);
break;
}
/* FALLTHROUGH */
case G_RAID3_DISK_STATE_STALE:
case G_RAID3_DISK_STATE_SYNCHRONIZING:
if (g_raid3_clear_metadata(disk) != 0) {
gctl_error(req, "Cannot clear metadata on %s.",
g_raid3_get_diskname(disk));
} else {
g_raid3_event_send(disk,
G_RAID3_DISK_STATE_DISCONNECTED,
G_RAID3_EVENT_DONTWAIT);
}
break;
case G_RAID3_DISK_STATE_NODISK:
break;
default:
gctl_error(req, "Cannot replace component number %jd.", *no);
break;
}
sx_xunlock(&sc->sc_lock);
}
void
g_raid3_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 '%s' argument.", "version");
return;
}
if (*version != G_RAID3_VERSION) {
gctl_error(req, "Userland and kernel parts are out of sync.");
return;
}
g_topology_unlock();
if (strcmp(verb, "configure") == 0)
g_raid3_ctl_configure(req, mp);
else if (strcmp(verb, "insert") == 0)
g_raid3_ctl_insert(req, mp);
else if (strcmp(verb, "rebuild") == 0)
g_raid3_ctl_rebuild(req, mp);
else if (strcmp(verb, "remove") == 0)
g_raid3_ctl_remove(req, mp);
else if (strcmp(verb, "stop") == 0)
g_raid3_ctl_stop(req, mp);
else
gctl_error(req, "Unknown verb.");
g_topology_lock();
}