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 1.26 2025/02/23 20:47:19 christos 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
53 static int cmd_resize(gpt_t, int, char *[]);
54
55 static const char *resizehelp[] = {
56 "[-i index | -b blocknr] [-a alignment] [-s size] [-q]",
57 };
58
59 const struct 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
68 static int
resize(gpt_t gpt,u_int entry,off_t alignment,off_t sectors,off_t size __unused,bool quiet)69 resize(gpt_t gpt, u_int entry, off_t alignment, off_t sectors,
70 off_t size __unused, bool quiet)
71 {
72 map_t map;
73 struct gpt_ent *ent;
74 unsigned int i;
75 off_t alignsecs, newsize, oldsize;
76 uint64_t end;
77
78
79 if (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
142 static int
cmd_resize(gpt_t gpt,int argc,char * argv[])143 cmd_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