1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 *  Copyright (c) 2005 Chris Jones
5 *  All rights reserved.
6 *
7 * This software was developed for the FreeBSD Project by Chris Jones
8 * thanks to the support of Google's Summer of Code program and
9 * mentoring by Lukas Ertl.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 */
33
34#include <sys/cdefs.h>
35__FBSDID("$FreeBSD$");
36
37#include <sys/libkern.h>
38#include <sys/malloc.h>
39
40#include <geom/geom.h>
41#include <geom/vinum/geom_vinum_var.h>
42#include <geom/vinum/geom_vinum.h>
43
44void
45gv_move(struct g_geom *gp, struct gctl_req *req)
46{
47	struct gv_softc *sc;
48	struct gv_sd *s;
49	struct gv_drive *d;
50	char buf[20], *destination, *object;
51	int *argc, *flags, i, type;
52
53	sc = gp->softc;
54
55	argc = gctl_get_paraml(req, "argc", sizeof(*argc));
56	if (argc == NULL) {
57		gctl_error(req, "no arguments given");
58		return;
59	}
60	flags = gctl_get_paraml(req, "flags", sizeof(*flags));
61	if (flags == NULL) {
62		gctl_error(req, "no flags given");
63		return;
64	}
65	destination = gctl_get_param(req, "destination", NULL);
66	if (destination == NULL) {
67		gctl_error(req, "no destination given");
68		return;
69	}
70	if (gv_object_type(sc, destination) != GV_TYPE_DRIVE) {
71		gctl_error(req, "destination '%s' is not a drive", destination);
72		return;
73	}
74	d = gv_find_drive(sc, destination);
75
76	/*
77	 * We start with 1 here, because argv[0] on the command line is the
78	 * destination drive.
79	 */
80	for (i = 1; i < *argc; i++) {
81		snprintf(buf, sizeof(buf), "argv%d", i);
82		object = gctl_get_param(req, buf, NULL);
83		if (object == NULL)
84			continue;
85
86		type = gv_object_type(sc, object);
87		if (type != GV_TYPE_SD) {
88			gctl_error(req, "you can only move subdisks; "
89			    "'%s' is not a subdisk", object);
90			return;
91		}
92
93		s = gv_find_sd(sc, object);
94		if (s == NULL) {
95			gctl_error(req, "unknown subdisk '%s'", object);
96			return;
97		}
98		gv_post_event(sc, GV_EVENT_MOVE_SD, s, d, *flags, 0);
99	}
100}
101
102/* Move a subdisk. */
103int
104gv_move_sd(struct gv_softc *sc, struct gv_sd *cursd,
105    struct gv_drive *destination, int flags)
106{
107	struct gv_drive *d;
108	struct gv_sd *newsd, *s, *s2;
109	struct gv_plex *p;
110	int err;
111
112	g_topology_assert();
113	KASSERT(cursd != NULL, ("gv_move_sd: NULL cursd"));
114	KASSERT(destination != NULL, ("gv_move_sd: NULL destination"));
115
116	d = cursd->drive_sc;
117
118	if ((gv_consumer_is_open(d->consumer) ||
119	    gv_consumer_is_open(destination->consumer)) &&
120	    !(flags & GV_FLAG_F)) {
121		G_VINUM_DEBUG(0, "consumers on current and destination drive "
122		    " still open");
123		return (GV_ERR_ISBUSY);
124	}
125
126	if (!(flags & GV_FLAG_F)) {
127		G_VINUM_DEBUG(1, "-f flag not passed; move would be "
128		    "destructive");
129		return (GV_ERR_INVFLAG);
130	}
131
132	if (destination == cursd->drive_sc) {
133		G_VINUM_DEBUG(1, "subdisk '%s' already on drive '%s'",
134		    cursd->name, destination->name);
135		return (GV_ERR_ISATTACHED);
136	}
137
138	/* XXX: Does it have to be part of a plex? */
139	p = gv_find_plex(sc, cursd->plex);
140	if (p == NULL) {
141		G_VINUM_DEBUG(0, "subdisk '%s' is not part of a plex",
142		    cursd->name);
143		return (GV_ERR_NOTFOUND);
144	}
145
146	/* Stale the old subdisk. */
147	err = gv_set_sd_state(cursd, GV_SD_STALE,
148	    GV_SETSTATE_FORCE | GV_SETSTATE_CONFIG);
149	if (err) {
150		G_VINUM_DEBUG(0, "unable to set the subdisk '%s' to state "
151		    "'stale'", cursd->name);
152		return (err);
153	}
154
155	/*
156	 * Create new subdisk. Ideally, we'd use gv_new_sd, but that requires
157	 * us to create a string for it to parse, which is silly.
158	 * TODO: maybe refactor gv_new_sd such that this is no longer the case.
159	 */
160	newsd = g_malloc(sizeof(struct gv_sd), M_WAITOK | M_ZERO);
161	newsd->plex_offset = cursd->plex_offset;
162	newsd->size = cursd->size;
163	newsd->drive_offset = -1;
164	strlcpy(newsd->name, cursd->name, sizeof(newsd->name));
165	strlcpy(newsd->drive, destination->name, sizeof(newsd->drive));
166	strlcpy(newsd->plex, cursd->plex, sizeof(newsd->plex));
167	newsd->state = GV_SD_STALE;
168	newsd->vinumconf = cursd->vinumconf;
169
170	err = gv_sd_to_drive(newsd, destination);
171	if (err) {
172		/* XXX not enough free space? */
173		g_free(newsd);
174		return (err);
175	}
176
177	/* Replace the old sd by the new one. */
178	LIST_FOREACH_SAFE(s, &p->subdisks, in_plex, s2) {
179		if (s == cursd) {
180			gv_rm_sd(sc, s);
181		}
182	}
183	gv_sd_to_plex(newsd, p);
184	LIST_INSERT_HEAD(&sc->subdisks, newsd, sd);
185	/* Update volume size of plex. */
186	if (p->vol_sc != NULL)
187		gv_update_vol_size(p->vol_sc, gv_vol_size(p->vol_sc));
188	gv_save_config(p->vinumconf);
189	return (0);
190}
191