resize.c revision 1.9
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 1.9 2014/09/29 20:28:57 christos Exp $"); 37 #endif 38 39 #include <sys/types.h> 40 41 #include <err.h> 42 #include <stddef.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <unistd.h> 47 #include <inttypes.h> 48 49 #include "map.h" 50 #include "gpt.h" 51 52 static off_t alignment, sectors, size; 53 static unsigned int entry; 54 55 const char resizemsg[] = "resize -i index [-a alignment] [-s size] device ..."; 56 57 __dead static void 58 usage_resize(void) 59 { 60 61 fprintf(stderr, 62 "usage: %s %s\n", getprogname(), resizemsg); 63 exit(1); 64 } 65 66 static void 67 resize(int fd) 68 { 69 uuid_t uuid; 70 map_t *gpt, *tpg; 71 map_t *tbl, *lbt; 72 map_t *map; 73 struct gpt_hdr *hdr; 74 struct gpt_ent *ent; 75 unsigned int i; 76 off_t alignsecs, newsize; 77 78 79 gpt = map_find(MAP_TYPE_PRI_GPT_HDR); 80 ent = NULL; 81 if (gpt == NULL) { 82 warnx("%s: error: no primary GPT header; run create or recover", 83 device_name); 84 return; 85 } 86 87 tpg = map_find(MAP_TYPE_SEC_GPT_HDR); 88 if (tpg == NULL) { 89 warnx("%s: error: no secondary GPT header; run recover", 90 device_name); 91 return; 92 } 93 94 tbl = map_find(MAP_TYPE_PRI_GPT_TBL); 95 lbt = map_find(MAP_TYPE_SEC_GPT_TBL); 96 if (tbl == NULL || lbt == NULL) { 97 warnx("%s: error: run recover -- trust me", device_name); 98 return; 99 } 100 101 hdr = gpt->map_data; 102 if (entry > le32toh(hdr->hdr_entries)) { 103 warnx("%s: error: index %u out of range (%u max)", device_name, 104 entry, le32toh(hdr->hdr_entries)); 105 return; 106 } 107 108 i = entry - 1; 109 ent = (void*)((char*)tbl->map_data + i * 110 le32toh(hdr->hdr_entsz)); 111 le_uuid_dec(ent->ent_type, &uuid); 112 if (uuid_is_nil(&uuid, NULL)) { 113 warnx("%s: error: entry at index %u is unused", 114 device_name, entry); 115 return; 116 } 117 118 alignsecs = alignment / secsz; 119 120 for (map = map_first(); map != NULL; map = map->map_next) { 121 if (entry == map->map_index) 122 break; 123 } 124 if (map == NULL) { 125 warnx("%s: error: could not find map entry corresponding " 126 "to index", device_name); 127 return; 128 } 129 130 if (sectors > 0 && sectors == map->map_size) 131 if (alignment == 0 || 132 (alignment > 0 && sectors % alignsecs == 0)) { 133 /* nothing to do */ 134 warnx("%s: partition does not need resizing", 135 device_name); 136 return; 137 } 138 139 newsize = map_resize(map, sectors, alignsecs); 140 if (newsize == 0 && alignment > 0) { 141 warnx("%s: could not resize partition with alignment " 142 "constraint", device_name); 143 return; 144 } else if (newsize == 0) { 145 warnx("%s: could not resize partition", device_name); 146 return; 147 } 148 149 ent->ent_lba_end = htole64(map->map_start + newsize - 1LL); 150 151 hdr->hdr_crc_table = htole32(crc32(tbl->map_data, 152 le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz))); 153 hdr->hdr_crc_self = 0; 154 hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size))); 155 156 gpt_write(fd, gpt); 157 gpt_write(fd, tbl); 158 159 hdr = tpg->map_data; 160 ent = (void*)((char*)lbt->map_data + i * le32toh(hdr->hdr_entsz)); 161 162 ent->ent_lba_end = htole64(map->map_start + newsize - 1LL); 163 164 hdr->hdr_crc_table = htole32(crc32(lbt->map_data, 165 le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz))); 166 hdr->hdr_crc_self = 0; 167 hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size))); 168 169 gpt_write(fd, lbt); 170 gpt_write(fd, tpg); 171 172 printf("Partition %d resized, use:\n", entry); 173 printf("\tdkctl %s addwedge <wedgename> %" PRIu64 " %" PRIu64 174 " <type>\n", device_arg, map->map_start, newsize); 175 printf("to create a wedge for it\n"); 176 } 177 178 int 179 cmd_resize(int argc, char *argv[]) 180 { 181 char *p; 182 int ch, fd; 183 int64_t human_num; 184 185 while ((ch = getopt(argc, argv, "a:i:s:")) != -1) { 186 switch(ch) { 187 case 'a': 188 if (alignment > 0) 189 usage_resize(); 190 if (dehumanize_number(optarg, &human_num) < 0) 191 usage_resize(); 192 alignment = human_num; 193 if (alignment < 1) 194 usage_resize(); 195 break; 196 case 'i': 197 if (entry > 0) 198 usage_resize(); 199 entry = strtoul(optarg, &p, 10); 200 if (*p != 0 || entry < 1) 201 usage_resize(); 202 break; 203 case 's': 204 if (sectors > 0 || size > 0) 205 usage_resize(); 206 sectors = strtoll(optarg, &p, 10); 207 if (sectors < 1) 208 usage_resize(); 209 if (*p == '\0') 210 break; 211 if (*p == 's' || *p == 'S') { 212 if (*(p + 1) == '\0') 213 break; 214 else 215 usage_resize(); 216 } 217 if (*p == 'b' || *p == 'B') { 218 if (*(p + 1) == '\0') { 219 size = sectors; 220 sectors = 0; 221 break; 222 } else 223 usage_resize(); 224 } 225 if (dehumanize_number(optarg, &human_num) < 0) 226 usage_resize(); 227 size = human_num; 228 sectors = 0; 229 break; 230 default: 231 usage_resize(); 232 } 233 } 234 235 if (argc == optind) 236 usage_resize(); 237 238 if (entry == 0) 239 usage_resize(); 240 241 while (optind < argc) { 242 fd = gpt_open(argv[optind++]); 243 if (fd == -1) { 244 warn("unable to open device '%s'", device_name); 245 continue; 246 } 247 248 if (alignment % secsz != 0) { 249 warnx("Alignment must be a multiple of sector size;"); 250 warnx("the sector size for %s is %d bytes.", 251 device_name, secsz); 252 continue; 253 } 254 255 if (size % secsz != 0) { 256 warnx("Size in bytes must be a multiple of sector " 257 "size;"); 258 warnx("the sector size for %s is %d bytes.", 259 device_name, secsz); 260 continue; 261 } 262 if (size > 0) 263 sectors = size / secsz; 264 265 resize(fd); 266 267 gpt_close(fd); 268 } 269 270 return 0; 271 } 272
Indexes created Sun Sep 21 20:09:37 GMT 2025