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