1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2010 Alexander Motin <mav@FreeBSD.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD$");
31
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/kernel.h>
35#include <sys/module.h>
36#include <sys/lock.h>
37#include <sys/mutex.h>
38#include <sys/bio.h>
39#include <sys/sysctl.h>
40#include <sys/malloc.h>
41#include <sys/bitstring.h>
42#include <vm/uma.h>
43#include <machine/atomic.h>
44#include <geom/geom.h>
45#include <sys/proc.h>
46#include <sys/kthread.h>
47#include <geom/raid/g_raid.h>
48#include "g_raid_md_if.h"
49
50static struct g_raid_softc *
51g_raid_find_node(struct g_class *mp, const char *name)
52{
53	struct g_raid_softc *sc;
54	struct g_geom *gp;
55	struct g_provider *pp;
56	struct g_raid_volume *vol;
57
58	/* Look for geom with specified name. */
59	LIST_FOREACH(gp, &mp->geom, geom) {
60		sc = gp->softc;
61		if (sc == NULL)
62			continue;
63		if (sc->sc_stopping != 0)
64			continue;
65		if (strcasecmp(sc->sc_name, name) == 0)
66			return (sc);
67	}
68
69	/* Look for provider with specified name. */
70	LIST_FOREACH(gp, &mp->geom, geom) {
71		sc = gp->softc;
72		if (sc == NULL)
73			continue;
74		if (sc->sc_stopping != 0)
75			continue;
76		LIST_FOREACH(pp, &gp->provider, provider) {
77			if (strcmp(pp->name, name) == 0)
78				return (sc);
79			if (strncmp(pp->name, "raid/", 5) == 0 &&
80			    strcmp(pp->name + 5, name) == 0)
81				return (sc);
82		}
83	}
84
85	/* Look for volume with specified name. */
86	LIST_FOREACH(gp, &mp->geom, geom) {
87		sc = gp->softc;
88		if (sc == NULL)
89			continue;
90		if (sc->sc_stopping != 0)
91			continue;
92		TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) {
93			if (strcmp(vol->v_name, name) == 0)
94				return (sc);
95		}
96	}
97	return (NULL);
98}
99
100static void
101g_raid_ctl_label(struct gctl_req *req, struct g_class *mp)
102{
103	struct g_geom *geom;
104	struct g_raid_softc *sc;
105	const char *format;
106	int *nargs;
107	int crstatus, ctlstatus;
108	char buf[64];
109
110	nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
111	if (nargs == NULL) {
112		gctl_error(req, "No '%s' argument.", "nargs");
113		return;
114	}
115	if (*nargs < 4) {
116		gctl_error(req, "Invalid number of arguments.");
117		return;
118	}
119	format = gctl_get_asciiparam(req, "arg0");
120	if (format == NULL) {
121		gctl_error(req, "No format received.");
122		return;
123	}
124	crstatus = g_raid_create_node_format(format, req, &geom);
125	if (crstatus == G_RAID_MD_TASTE_FAIL) {
126		gctl_error(req, "Failed to create array with format '%s'.",
127		    format);
128		return;
129	}
130	sc = (struct g_raid_softc *)geom->softc;
131	g_topology_unlock();
132	sx_xlock(&sc->sc_lock);
133	ctlstatus = G_RAID_MD_CTL(sc->sc_md, req);
134	if (ctlstatus < 0) {
135		gctl_error(req, "Command failed: %d.", ctlstatus);
136		if (crstatus == G_RAID_MD_TASTE_NEW)
137			g_raid_destroy_node(sc, 0);
138	} else {
139		if (crstatus == G_RAID_MD_TASTE_NEW)
140			snprintf(buf, sizeof(buf), "%s created\n", sc->sc_name);
141		else
142			snprintf(buf, sizeof(buf), "%s reused\n", sc->sc_name);
143		gctl_set_param_err(req, "output", buf, strlen(buf) + 1);
144	}
145	sx_xunlock(&sc->sc_lock);
146	g_topology_lock();
147}
148
149static void
150g_raid_ctl_stop(struct gctl_req *req, struct g_class *mp)
151{
152	struct g_raid_softc *sc;
153	const char *nodename;
154	int *nargs, *force;
155	int error, how;
156
157	nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
158	if (nargs == NULL) {
159		gctl_error(req, "No '%s' argument.", "nargs");
160		return;
161	}
162	if (*nargs != 1) {
163		gctl_error(req, "Invalid number of arguments.");
164		return;
165	}
166	nodename = gctl_get_asciiparam(req, "arg0");
167	if (nodename == NULL) {
168		gctl_error(req, "No array name received.");
169		return;
170	}
171	sc = g_raid_find_node(mp, nodename);
172	if (sc == NULL) {
173		gctl_error(req, "Array '%s' not found.", nodename);
174		return;
175	}
176	force = gctl_get_paraml(req, "force", sizeof(*force));
177	if (force != NULL && *force)
178		how = G_RAID_DESTROY_HARD;
179	else
180		how = G_RAID_DESTROY_SOFT;
181	g_topology_unlock();
182	sx_xlock(&sc->sc_lock);
183	error = g_raid_destroy(sc, how);
184	if (error != 0)
185		gctl_error(req, "Array is busy.");
186	g_topology_lock();
187}
188
189static void
190g_raid_ctl_other(struct gctl_req *req, struct g_class *mp)
191{
192	struct g_raid_softc *sc;
193	const char *nodename;
194	int *nargs;
195	int ctlstatus;
196
197	nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
198	if (nargs == NULL) {
199		gctl_error(req, "No '%s' argument.", "nargs");
200		return;
201	}
202	if (*nargs < 1) {
203		gctl_error(req, "Invalid number of arguments.");
204		return;
205	}
206	nodename = gctl_get_asciiparam(req, "arg0");
207	if (nodename == NULL) {
208		gctl_error(req, "No array name received.");
209		return;
210	}
211	sc = g_raid_find_node(mp, nodename);
212	if (sc == NULL) {
213		gctl_error(req, "Array '%s' not found.", nodename);
214		return;
215	}
216	g_topology_unlock();
217	sx_xlock(&sc->sc_lock);
218	if (sc->sc_md != NULL) {
219		ctlstatus = G_RAID_MD_CTL(sc->sc_md, req);
220		if (ctlstatus < 0)
221			gctl_error(req, "Command failed: %d.", ctlstatus);
222	}
223	sx_xunlock(&sc->sc_lock);
224	g_topology_lock();
225}
226
227void
228g_raid_ctl(struct gctl_req *req, struct g_class *mp, const char *verb)
229{
230	uint32_t *version;
231
232	g_topology_assert();
233
234	version = gctl_get_paraml(req, "version", sizeof(*version));
235	if (version == NULL) {
236		gctl_error(req, "No '%s' argument.", "version");
237		return;
238	}
239	if (*version != G_RAID_VERSION) {
240		gctl_error(req, "Userland and kernel parts are out of sync.");
241		return;
242	}
243
244	if (strcmp(verb, "label") == 0)
245		g_raid_ctl_label(req, mp);
246	else if (strcmp(verb, "stop") == 0)
247		g_raid_ctl_stop(req, mp);
248	else
249		g_raid_ctl_other(req, mp);
250}
251