1/*-
2 * Copyright (c) 2002 Marcel Moolenaar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#if HAVE_NBTOOL_CONFIG_H
28#include "nbtool_config.h"
29#endif
30
31#include <sys/cdefs.h>
32#ifdef __FBSDID
33__FBSDID("$FreeBSD: src/sbin/gpt/add.c,v 1.14 2006/06/22 22:05:28 marcel Exp $");
34#endif
35#ifdef __RCSID
36__RCSID("$NetBSD: resize.c,v 1.25 2020/05/24 14:42:44 jmcneill Exp $");
37#endif
38
39#include <sys/types.h>
40
41#include <err.h>
42#include <stdbool.h>
43#include <stddef.h>
44#include <stdio.h>
45#include <stdlib.h>
46#include <string.h>
47#include <unistd.h>
48
49#include "map.h"
50#include "gpt.h"
51#include "gpt_private.h"
52
53static int cmd_resize(gpt_t, int, char *[]);
54
55static const char *resizehelp[] = {
56	"[-i index | -b blocknr] [-a alignment] [-s size] [-q]",
57};
58
59struct gpt_cmd c_resize = {
60	"resize",
61	cmd_resize,
62	resizehelp, __arraycount(resizehelp),
63	GPT_SYNC,
64};
65
66#define usage() gpt_usage(NULL, &c_resize)
67
68static int
69resize(gpt_t gpt, u_int entry, off_t alignment, off_t sectors, off_t size, bool quiet)
70{
71	map_t map;
72	struct gpt_hdr *hdr;
73	struct gpt_ent *ent;
74	unsigned int i;
75	off_t alignsecs, newsize, oldsize;
76	uint64_t end;
77
78
79	if ((hdr = gpt_hdr(gpt)) == NULL)
80		return -1;
81
82	i = entry - 1;
83	ent = gpt_ent_primary(gpt, i);
84	if (gpt_uuid_is_nil(ent->ent_type)) {
85		gpt_warnx(gpt, "Entry at index %u is unused", entry);
86		return -1;
87	}
88
89	alignsecs = alignment / gpt->secsz;
90
91	for (map = map_first(gpt); map != NULL; map = map->map_next) {
92		if (entry == map->map_index)
93			break;
94	}
95	if (map == NULL) {
96		gpt_warnx(gpt, "Could not find map entry corresponding "
97		    "to index");
98		return -1;
99	}
100
101	if (sectors > 0 && sectors == map->map_size)
102		if (alignment == 0 ||
103		    (alignment > 0 && sectors % alignsecs == 0)) {
104			/* nothing to do */
105			if (!quiet)
106				gpt_warnx(gpt,
107				    "partition does not need resizing");
108			return 0;
109		}
110
111	oldsize = map->map_size;
112	newsize = map_resize(gpt, map, sectors, alignsecs);
113	if (newsize == -1)
114		return -1;
115
116	if (oldsize == newsize) {
117		/* Nothing to do */
118		if (!quiet)
119			gpt_warnx(gpt,
120			    "partition does not need resizing");
121		return 0;
122	}
123
124	end = htole64((uint64_t)(map->map_start + newsize - 1LL));
125	ent->ent_lba_end = end;
126
127	if (gpt_write_primary(gpt) == -1)
128		return -1;
129
130	ent = gpt_ent(gpt->gpt, gpt->lbt, i);
131	ent->ent_lba_end = end;
132
133	if (gpt_write_backup(gpt) == -1)
134		return -1;
135
136	gpt_msg(gpt, "Partition %d resized: %" PRIu64 " %" PRIu64, entry,
137	    map->map_start, newsize);
138
139	return 0;
140}
141
142static int
143cmd_resize(gpt_t gpt, int argc, char *argv[])
144{
145	int ch;
146	off_t alignment = 0, sectors, start = 0, size = 0;
147	unsigned int entry = 0;
148	map_t m;
149	bool quiet = false;
150
151	while ((ch = getopt(argc, argv, GPT_AIS "b:q")) != -1) {
152		if (ch == 'b')
153			gpt_human_get(gpt, &start);
154		else if (ch == 'q')
155			quiet = true;
156		else if (gpt_add_ais(gpt, &alignment, &entry, &size, ch) == -1)
157			return usage();
158	}
159
160	if (argc != optind)
161		return usage();
162
163	if (start > 0) {
164		for (m = map_first(gpt); m != NULL; m = m->map_next) {
165			if (m->map_type != MAP_TYPE_GPT_PART ||
166			    m->map_index < 1)
167				continue;
168			if (start != m->map_start)
169				continue;
170			entry = m->map_index;
171			break;
172		}
173	}
174
175	if ((sectors = gpt_check_ais(gpt, alignment, entry, size)) == -1)
176		return -1;
177
178	return resize(gpt, entry, alignment, sectors, size, quiet);
179}
180