| Current Path : /sys/geom/mirror/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/geom/mirror/g_mirror_ctl.c |
/*-
* Copyright (c) 2004-2009 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/mirror/g_mirror_ctl.c 235968 2012-05-25 04:26:14Z ae $");
#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/mirror/g_mirror.h>
static struct g_mirror_softc *
g_mirror_find_device(struct g_class *mp, const char *name)
{
struct g_mirror_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_MIRROR_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_mirror_disk *
g_mirror_find_disk(struct g_mirror_softc *sc, const char *name)
{
struct g_mirror_disk *disk;
sx_assert(&sc->sc_lock, SX_XLOCKED);
if (strncmp(name, "/dev/", 5) == 0)
name += 5;
LIST_FOREACH(disk, &sc->sc_disks, d_next) {
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_mirror_ctl_configure(struct gctl_req *req, struct g_class *mp)
{
struct g_mirror_softc *sc;
struct g_mirror_disk *disk;
const char *name, *balancep, *prov;
intmax_t *slicep, *priority;
uint32_t slice;
uint8_t balance;
int *autosync, *noautosync, *failsync, *nofailsync, *hardcode, *dynamic;
int *nargs, do_sync = 0, dirty = 1, do_priority = 0;
nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
if (nargs == NULL) {
gctl_error(req, "No '%s' argument.", "nargs");
return;
}
if (*nargs != 1 && *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;
}
balancep = gctl_get_asciiparam(req, "balance");
if (balancep == NULL) {
gctl_error(req, "No '%s' argument.", "balance");
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;
}
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;
}
hardcode = gctl_get_paraml(req, "hardcode", sizeof(*hardcode));
if (hardcode == NULL) {
gctl_error(req, "No '%s' argument.", "hardcode");
return;
}
dynamic = gctl_get_paraml(req, "dynamic", sizeof(*dynamic));
if (dynamic == NULL) {
gctl_error(req, "No '%s' argument.", "dynamic");
return;
}
priority = gctl_get_paraml(req, "priority", sizeof(*priority));
if (priority == NULL) {
gctl_error(req, "No '%s' argument.", "priority");
return;
}
if (*priority < -1 || *priority > 255) {
gctl_error(req, "Priority range is 0 to 255, %jd given",
*priority);
return;
}
/*
* Since we have a priority, we also need a provider now.
* Note: be WARNS safe, by always assigning prov and only throw an
* error if *priority != -1.
*/
prov = gctl_get_asciiparam(req, "arg1");
if (*priority > -1) {
if (prov == NULL) {
gctl_error(req, "Priority needs a disk name");
return;
}
do_priority = 1;
}
if (*autosync && *noautosync) {
gctl_error(req, "'%s' and '%s' specified.", "autosync",
"noautosync");
return;
}
if (*failsync && *nofailsync) {
gctl_error(req, "'%s' and '%s' specified.", "failsync",
"nofailsync");
return;
}
if (*hardcode && *dynamic) {
gctl_error(req, "'%s' and '%s' specified.", "hardcode",
"dynamic");
return;
}
sc = g_mirror_find_device(mp, name);
if (sc == NULL) {
gctl_error(req, "No such device: %s.", name);
return;
}
if (*balancep == '\0')
balance = sc->sc_balance;
else {
if (balance_id(balancep) == -1) {
gctl_error(req, "Invalid balance algorithm.");
sx_xunlock(&sc->sc_lock);
return;
}
balance = balance_id(balancep);
}
slicep = gctl_get_paraml(req, "slice", sizeof(*slicep));
if (slicep == NULL) {
gctl_error(req, "No '%s' argument.", "slice");
sx_xunlock(&sc->sc_lock);
return;
}
if (*slicep == -1)
slice = sc->sc_slice;
else
slice = *slicep;
/* Enforce usage() of -p not allowing any other options. */
if (do_priority && (*autosync || *noautosync || *failsync ||
*nofailsync || *hardcode || *dynamic || *slicep != -1 ||
*balancep != '\0')) {
sx_xunlock(&sc->sc_lock);
gctl_error(req, "only -p accepted when setting priority");
return;
}
if (sc->sc_balance == balance && sc->sc_slice == slice && !*autosync &&
!*noautosync && !*failsync && !*nofailsync && !*hardcode &&
!*dynamic && !do_priority) {
sx_xunlock(&sc->sc_lock);
gctl_error(req, "Nothing has changed.");
return;
}
if ((!do_priority && *nargs != 1) || (do_priority && *nargs != 2)) {
sx_xunlock(&sc->sc_lock);
gctl_error(req, "Invalid number of arguments.");
return;
}
if (g_mirror_ndisks(sc, -1) < sc->sc_ndisks) {
sx_xunlock(&sc->sc_lock);
gctl_error(req, "Not all disks connected. Try 'forget' command "
"first.");
return;
}
sc->sc_balance = balance;
sc->sc_slice = slice;
if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_NOAUTOSYNC) != 0) {
if (*autosync) {
sc->sc_flags &= ~G_MIRROR_DEVICE_FLAG_NOAUTOSYNC;
do_sync = 1;
}
} else {
if (*noautosync)
sc->sc_flags |= G_MIRROR_DEVICE_FLAG_NOAUTOSYNC;
}
if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_NOFAILSYNC) != 0) {
if (*failsync)
sc->sc_flags &= ~G_MIRROR_DEVICE_FLAG_NOFAILSYNC;
} else {
if (*nofailsync) {
sc->sc_flags |= G_MIRROR_DEVICE_FLAG_NOFAILSYNC;
dirty = 0;
}
}
LIST_FOREACH(disk, &sc->sc_disks, d_next) {
/*
* Handle priority first, since we only need one disk, do one
* operation on it and then we're done. No need to check other
* flags, as usage doesn't allow it.
*/
if (do_priority) {
if (strcmp(disk->d_name, prov) == 0) {
if (disk->d_priority == *priority)
gctl_error(req, "Nothing has changed.");
else {
disk->d_priority = *priority;
g_mirror_update_metadata(disk);
}
break;
}
continue;
}
if (do_sync) {
if (disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING)
disk->d_flags &= ~G_MIRROR_DISK_FLAG_FORCE_SYNC;
}
if (*hardcode)
disk->d_flags |= G_MIRROR_DISK_FLAG_HARDCODED;
else if (*dynamic)
disk->d_flags &= ~G_MIRROR_DISK_FLAG_HARDCODED;
if (!dirty)
disk->d_flags &= ~G_MIRROR_DISK_FLAG_DIRTY;
g_mirror_update_metadata(disk);
if (do_sync) {
if (disk->d_state == G_MIRROR_DISK_STATE_STALE) {
g_mirror_event_send(disk,
G_MIRROR_DISK_STATE_DISCONNECTED,
G_MIRROR_EVENT_DONTWAIT);
}
}
}
sx_xunlock(&sc->sc_lock);
}
static void
g_mirror_ctl_rebuild(struct gctl_req *req, struct g_class *mp)
{
struct g_mirror_metadata md;
struct g_mirror_softc *sc;
struct g_mirror_disk *disk;
struct g_provider *pp;
const char *name;
char param[16];
int error, *nargs;
u_int i;
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, "Too few arguments.");
return;
}
name = gctl_get_asciiparam(req, "arg0");
if (name == NULL) {
gctl_error(req, "No 'arg%u' argument.", 0);
return;
}
sc = g_mirror_find_device(mp, name);
if (sc == NULL) {
gctl_error(req, "No such device: %s.", name);
return;
}
for (i = 1; 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);
continue;
}
disk = g_mirror_find_disk(sc, name);
if (disk == NULL) {
gctl_error(req, "No such provider: %s.", name);
continue;
}
if (g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_ACTIVE) == 1 &&
disk->d_state == G_MIRROR_DISK_STATE_ACTIVE) {
/*
* This is the last active disk. There will be nothing
* to rebuild it from, so deny this request.
*/
gctl_error(req,
"Provider %s is the last active provider in %s.",
name, sc->sc_geom->name);
break;
}
/*
* Do rebuild by resetting syncid, disconnecting the disk and
* connecting it again.
*/
disk->d_sync.ds_syncid = 0;
if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_NOAUTOSYNC) != 0)
disk->d_flags |= G_MIRROR_DISK_FLAG_FORCE_SYNC;
g_mirror_update_metadata(disk);
pp = disk->d_consumer->provider;
g_topology_lock();
error = g_mirror_read_metadata(disk->d_consumer, &md);
g_topology_unlock();
g_mirror_event_send(disk, G_MIRROR_DISK_STATE_DISCONNECTED,
G_MIRROR_EVENT_WAIT);
if (error != 0) {
gctl_error(req, "Cannot read metadata from %s.",
pp->name);
continue;
}
error = g_mirror_add_disk(sc, pp, &md);
if (error != 0) {
gctl_error(req, "Cannot reconnect component %s.",
pp->name);
continue;
}
}
sx_xunlock(&sc->sc_lock);
}
static void
g_mirror_ctl_insert(struct gctl_req *req, struct g_class *mp)
{
struct g_mirror_softc *sc;
struct g_mirror_disk *disk;
struct g_mirror_metadata md;
struct g_provider *pp;
struct g_consumer *cp;
intmax_t *priority;
const char *name;
char param[16];
u_char *sector;
u_int i, n;
int error, *nargs, *hardcode, *inactive;
struct {
struct g_provider *provider;
struct g_consumer *consumer;
} *disks;
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, "Too few arguments.");
return;
}
priority = gctl_get_paraml(req, "priority", sizeof(*priority));
if (priority == NULL) {
gctl_error(req, "No '%s' argument.", "priority");
return;
}
inactive = gctl_get_paraml(req, "inactive", sizeof(*inactive));
if (inactive == NULL) {
gctl_error(req, "No '%s' argument.", "inactive");
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, "arg0");
if (name == NULL) {
gctl_error(req, "No 'arg%u' argument.", 0);
return;
}
sc = g_mirror_find_device(mp, name);
if (sc == NULL) {
gctl_error(req, "No such device: %s.", name);
return;
}
if (g_mirror_ndisks(sc, -1) < sc->sc_ndisks) {
gctl_error(req, "Not all disks connected.");
sx_xunlock(&sc->sc_lock);
return;
}
disks = g_malloc(sizeof(*disks) * (*nargs), M_WAITOK | M_ZERO);
g_topology_lock();
for (i = 1, n = 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);
continue;
}
if (g_mirror_find_disk(sc, name) != NULL) {
gctl_error(req, "Provider %s already inserted.", name);
continue;
}
if (strncmp(name, "/dev/", 5) == 0)
name += 5;
pp = g_provider_by_name(name);
if (pp == NULL) {
gctl_error(req, "Unknown provider %s.", name);
continue;
}
if (sc->sc_provider->mediasize >
pp->mediasize - pp->sectorsize) {
gctl_error(req, "Provider %s too small.", name);
continue;
}
if ((sc->sc_provider->sectorsize % pp->sectorsize) != 0) {
gctl_error(req, "Invalid sectorsize of provider %s.",
name);
continue;
}
cp = g_new_consumer(sc->sc_geom);
if (g_attach(cp, pp) != 0) {
g_destroy_consumer(cp);
gctl_error(req, "Cannot attach to provider %s.", name);
continue;
}
if (g_access(cp, 0, 1, 1) != 0) {
g_detach(cp);
g_destroy_consumer(cp);
gctl_error(req, "Cannot access provider %s.", name);
continue;
}
disks[n].provider = pp;
disks[n].consumer = cp;
n++;
}
if (n == 0) {
g_topology_unlock();
sx_xunlock(&sc->sc_lock);
g_free(disks);
return;
}
sc->sc_ndisks += n;
again:
for (i = 0; i < n; i++) {
if (disks[i].consumer == NULL)
continue;
g_mirror_fill_metadata(sc, NULL, &md);
md.md_priority = *priority;
if (*inactive)
md.md_dflags |= G_MIRROR_DISK_FLAG_INACTIVE;
pp = disks[i].provider;
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);
mirror_metadata_encode(&md, sector);
error = g_write_data(disks[i].consumer,
pp->mediasize - pp->sectorsize, sector, pp->sectorsize);
g_free(sector);
if (error != 0) {
gctl_error(req, "Cannot store metadata on %s.",
pp->name);
g_access(disks[i].consumer, 0, -1, -1);
g_detach(disks[i].consumer);
g_destroy_consumer(disks[i].consumer);
disks[i].consumer = NULL;
disks[i].provider = NULL;
sc->sc_ndisks--;
goto again;
}
}
g_topology_unlock();
if (i == 0) {
/* All writes failed. */
sx_xunlock(&sc->sc_lock);
g_free(disks);
return;
}
LIST_FOREACH(disk, &sc->sc_disks, d_next) {
g_mirror_update_metadata(disk);
}
/*
* Release provider and wait for retaste.
*/
g_topology_lock();
for (i = 0; i < n; i++) {
if (disks[i].consumer == NULL)
continue;
g_access(disks[i].consumer, 0, -1, -1);
g_detach(disks[i].consumer);
g_destroy_consumer(disks[i].consumer);
}
g_topology_unlock();
sx_xunlock(&sc->sc_lock);
g_free(disks);
}
static void
g_mirror_ctl_remove(struct gctl_req *req, struct g_class *mp)
{
struct g_mirror_softc *sc;
struct g_mirror_disk *disk;
const char *name;
char param[16];
int *nargs;
u_int i, active;
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, "Too few arguments.");
return;
}
name = gctl_get_asciiparam(req, "arg0");
if (name == NULL) {
gctl_error(req, "No 'arg%u' argument.", 0);
return;
}
sc = g_mirror_find_device(mp, name);
if (sc == NULL) {
gctl_error(req, "No such device: %s.", name);
return;
}
if (g_mirror_ndisks(sc, -1) < sc->sc_ndisks) {
sx_xunlock(&sc->sc_lock);
gctl_error(req, "Not all disks connected. Try 'forget' command "
"first.");
return;
}
active = g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_ACTIVE);
for (i = 1; 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);
continue;
}
disk = g_mirror_find_disk(sc, name);
if (disk == NULL) {
gctl_error(req, "No such provider: %s.", name);
continue;
}
if (disk->d_state == G_MIRROR_DISK_STATE_ACTIVE) {
if (active > 1)
active--;
else {
gctl_error(req, "%s: Can't remove the last "
"ACTIVE component %s.", sc->sc_geom->name,
name);
continue;
}
}
g_mirror_event_send(disk, G_MIRROR_DISK_STATE_DESTROY,
G_MIRROR_EVENT_DONTWAIT);
}
sx_xunlock(&sc->sc_lock);
}
static void
g_mirror_ctl_deactivate(struct gctl_req *req, struct g_class *mp)
{
struct g_mirror_softc *sc;
struct g_mirror_disk *disk;
const char *name;
char param[16];
int *nargs;
u_int i;
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, "Too few arguments.");
return;
}
name = gctl_get_asciiparam(req, "arg0");
if (name == NULL) {
gctl_error(req, "No 'arg%u' argument.", 0);
return;
}
sc = g_mirror_find_device(mp, name);
if (sc == NULL) {
gctl_error(req, "No such device: %s.", name);
return;
}
for (i = 1; 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);
continue;
}
disk = g_mirror_find_disk(sc, name);
if (disk == NULL) {
gctl_error(req, "No such provider: %s.", name);
continue;
}
disk->d_flags |= G_MIRROR_DISK_FLAG_INACTIVE;
disk->d_flags &= ~G_MIRROR_DISK_FLAG_FORCE_SYNC;
g_mirror_update_metadata(disk);
sc->sc_bump_id |= G_MIRROR_BUMP_SYNCID;
g_mirror_event_send(disk, G_MIRROR_DISK_STATE_DISCONNECTED,
G_MIRROR_EVENT_DONTWAIT);
}
sx_xunlock(&sc->sc_lock);
}
static void
g_mirror_ctl_forget(struct gctl_req *req, struct g_class *mp)
{
struct g_mirror_softc *sc;
struct g_mirror_disk *disk;
const char *name;
char param[16];
int *nargs;
u_int i;
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;
}
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_mirror_find_device(mp, name);
if (sc == NULL) {
gctl_error(req, "No such device: %s.", name);
return;
}
if (g_mirror_ndisks(sc, -1) == sc->sc_ndisks) {
sx_xunlock(&sc->sc_lock);
G_MIRROR_DEBUG(1,
"All disks connected in %s, skipping.",
sc->sc_name);
continue;
}
sc->sc_ndisks = g_mirror_ndisks(sc, -1);
LIST_FOREACH(disk, &sc->sc_disks, d_next) {
g_mirror_update_metadata(disk);
}
sx_xunlock(&sc->sc_lock);
}
}
static void
g_mirror_ctl_stop(struct gctl_req *req, struct g_class *mp)
{
struct g_mirror_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_MIRROR_DESTROY_HARD;
else
how = G_MIRROR_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_mirror_find_device(mp, name);
if (sc == NULL) {
gctl_error(req, "No such device: %s.", name);
return;
}
g_cancel_event(sc);
error = g_mirror_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. */
}
}
void
g_mirror_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_MIRROR_VERSION) {
gctl_error(req, "Userland and kernel parts are out of sync.");
return;
}
g_topology_unlock();
if (strcmp(verb, "configure") == 0)
g_mirror_ctl_configure(req, mp);
else if (strcmp(verb, "rebuild") == 0)
g_mirror_ctl_rebuild(req, mp);
else if (strcmp(verb, "insert") == 0)
g_mirror_ctl_insert(req, mp);
else if (strcmp(verb, "remove") == 0)
g_mirror_ctl_remove(req, mp);
else if (strcmp(verb, "deactivate") == 0)
g_mirror_ctl_deactivate(req, mp);
else if (strcmp(verb, "forget") == 0)
g_mirror_ctl_forget(req, mp);
else if (strcmp(verb, "stop") == 0)
g_mirror_ctl_stop(req, mp);
else
gctl_error(req, "Unknown verb.");
g_topology_lock();
}