freebsd-nq/sys/geom/raid/g_raid_ctl.c

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/*-
* Copyright (c) 2010 Alexander Motin <mav@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("$FreeBSD$");
#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/raid/g_raid.h>
#include "g_raid_md_if.h"
static struct g_raid_softc *
g_raid_find_node(struct g_class *mp, const char *name)
{
struct g_raid_softc *sc;
struct g_geom *gp;
LIST_FOREACH(gp, &mp->geom, geom) {
sc = gp->softc;
if (sc == NULL)
continue;
if (sc->sc_stopping != 0)
continue;
if (strcasecmp(sc->sc_name, name) == 0)
return (sc);
}
return (NULL);
}
static void
g_raid_ctl_label(struct gctl_req *req, struct g_class *mp)
{
struct g_geom *geom;
struct g_raid_softc *sc;
const char *format;
int *nargs;
int crstatus, ctlstatus;
char buf[64];
nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
if (nargs == NULL) {
gctl_error(req, "No '%s' argument.", "nargs");
return;
}
if (*nargs < 4) {
gctl_error(req, "Invalid number of arguments.");
return;
}
format = gctl_get_asciiparam(req, "arg0");
if (format == NULL) {
gctl_error(req, "No format recieved.");
return;
}
crstatus = g_raid_create_node_format(format, &geom);
if (crstatus == G_RAID_MD_TASTE_FAIL) {
gctl_error(req, "Failed to create array with format '%s'.",
format);
return;
}
sc = (struct g_raid_softc *)geom->softc;
g_topology_unlock();
sx_xlock(&sc->sc_lock);
ctlstatus = G_RAID_MD_CTL(sc->sc_md, req);
if (ctlstatus < 0) {
gctl_error(req, "Command failed: %d.", ctlstatus);
if (crstatus == G_RAID_MD_TASTE_NEW)
g_raid_destroy_node(sc, 0);
} else {
if (crstatus == G_RAID_MD_TASTE_NEW)
snprintf(buf, sizeof(buf), "%s created\n", sc->sc_name);
else
snprintf(buf, sizeof(buf), "%s reused\n", sc->sc_name);
gctl_set_param_err(req, "output", buf, strlen(buf) + 1);
}
sx_xunlock(&sc->sc_lock);
g_topology_lock();
}
static void
g_raid_ctl_stop(struct gctl_req *req, struct g_class *mp)
{
struct g_raid_softc *sc;
const char *nodename;
int *nargs, *force;
int error, 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, "Invalid number of arguments.");
return;
}
nodename = gctl_get_asciiparam(req, "arg0");
if (nodename == NULL) {
gctl_error(req, "No array name recieved.");
return;
}
sc = g_raid_find_node(mp, nodename);
if (sc == NULL) {
gctl_error(req, "Array '%s' not found.", nodename);
return;
}
force = gctl_get_paraml(req, "force", sizeof(*force));
if (force != NULL && *force)
how = G_RAID_DESTROY_HARD;
else
how = G_RAID_DESTROY_SOFT;
g_topology_unlock();
sx_xlock(&sc->sc_lock);
error = g_raid_destroy(sc, how);
if (error != 0)
sx_xunlock(&sc->sc_lock);
g_topology_lock();
}
static void
g_raid_ctl_other(struct gctl_req *req, struct g_class *mp)
{
struct g_raid_softc *sc;
const char *nodename;
int *nargs;
int ctlstatus;
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;
}
nodename = gctl_get_asciiparam(req, "arg0");
if (nodename == NULL) {
gctl_error(req, "No array name recieved.");
return;
}
sc = g_raid_find_node(mp, nodename);
if (sc == NULL) {
gctl_error(req, "Array '%s' not found.", nodename);
return;
}
g_topology_unlock();
sx_xlock(&sc->sc_lock);
if (sc->sc_md != NULL) {
ctlstatus = G_RAID_MD_CTL(sc->sc_md, req);
if (ctlstatus < 0)
gctl_error(req, "Command failed: %d.", ctlstatus);
}
sx_xunlock(&sc->sc_lock);
g_topology_lock();
}
void
g_raid_ctl(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_RAID_VERSION) {
gctl_error(req, "Userland and kernel parts are out of sync.");
return;
}
if (strcmp(verb, "label") == 0)
g_raid_ctl_label(req, mp);
else if (strcmp(verb, "stop") == 0)
g_raid_ctl_stop(req, mp);
else
g_raid_ctl_other(req, mp);
}