resize.c revision 1.8.6.1
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 1.8.6.1 2015/06/02 19:49:38 snj 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 48 #include "map.h" 49 #include "gpt.h" 50 51 static off_t alignment, sectors, size; 52 static unsigned int entry; 53 54 const char resizemsg[] = "resize -i index [-a alignment] [-s size] device ..."; 55 56 __dead static void 57 usage_resize(void) 58 { 59 60 fprintf(stderr, 61 "usage: %s %s\n", getprogname(), resizemsg); 62 exit(1); 63 } 64 65 static void 66 resize(int fd) 67 { 68 map_t *gpt, *tpg; 69 map_t *tbl, *lbt; 70 map_t *map; 71 struct gpt_hdr *hdr; 72 struct gpt_ent *ent; 73 unsigned int i; 74 off_t alignsecs, newsize; 75 76 77 gpt = map_find(MAP_TYPE_PRI_GPT_HDR); 78 ent = NULL; 79 if (gpt == NULL) { 80 warnx("%s: error: no primary GPT header; run create or recover", 81 device_name); 82 return; 83 } 84 85 tpg = map_find(MAP_TYPE_SEC_GPT_HDR); 86 if (tpg == NULL) { 87 warnx("%s: error: no secondary GPT header; run recover", 88 device_name); 89 return; 90 } 91 92 tbl = map_find(MAP_TYPE_PRI_GPT_TBL); 93 lbt = map_find(MAP_TYPE_SEC_GPT_TBL); 94 if (tbl == NULL || lbt == NULL) { 95 warnx("%s: error: run recover -- trust me", device_name); 96 return; 97 } 98 99 hdr = gpt->map_data; 100 if (entry > le32toh(hdr->hdr_entries)) { 101 warnx("%s: error: index %u out of range (%u max)", device_name, 102 entry, le32toh(hdr->hdr_entries)); 103 return; 104 } 105 106 i = entry - 1; 107 ent = (void*)((char*)tbl->map_data + i * 108 le32toh(hdr->hdr_entsz)); 109 if (gpt_uuid_is_nil(ent->ent_type)) { 110 warnx("%s: error: entry at index %u is unused", 111 device_name, entry); 112 return; 113 } 114 115 alignsecs = alignment / secsz; 116 117 for (map = map_first(); map != NULL; map = map->map_next) { 118 if (entry == map->map_index) 119 break; 120 } 121 if (map == NULL) { 122 warnx("%s: error: could not find map entry corresponding " 123 "to index", device_name); 124 return; 125 } 126 127 if (sectors > 0 && sectors == map->map_size) 128 if (alignment == 0 || 129 (alignment > 0 && sectors % alignsecs == 0)) { 130 /* nothing to do */ 131 warnx("%s: partition does not need resizing", 132 device_name); 133 return; 134 } 135 136 newsize = map_resize(map, sectors, alignsecs); 137 if (newsize == 0 && alignment > 0) { 138 warnx("%s: could not resize partition with alignment " 139 "constraint", device_name); 140 return; 141 } else if (newsize == 0) { 142 warnx("%s: could not resize partition", device_name); 143 return; 144 } 145 146 ent->ent_lba_end = htole64(map->map_start + newsize - 1LL); 147 148 hdr->hdr_crc_table = htole32(crc32(tbl->map_data, 149 le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz))); 150 hdr->hdr_crc_self = 0; 151 hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size))); 152 153 gpt_write(fd, gpt); 154 gpt_write(fd, tbl); 155 156 hdr = tpg->map_data; 157 ent = (void*)((char*)lbt->map_data + i * le32toh(hdr->hdr_entsz)); 158 159 ent->ent_lba_end = htole64(map->map_start + newsize - 1LL); 160 161 hdr->hdr_crc_table = htole32(crc32(lbt->map_data, 162 le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz))); 163 hdr->hdr_crc_self = 0; 164 hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size))); 165 166 gpt_write(fd, lbt); 167 gpt_write(fd, tpg); 168 169 printf("Partition %d resized, use:\n", entry); 170 printf("\tdkctl %s addwedge <wedgename> %" PRIu64 " %" PRIu64 171 " <type>\n", device_arg, map->map_start, newsize); 172 printf("to create a wedge for it\n"); 173 } 174 175 int 176 cmd_resize(int argc, char *argv[]) 177 { 178 char *p; 179 int ch, fd; 180 int64_t human_num; 181 182 while ((ch = getopt(argc, argv, "a:i:s:")) != -1) { 183 switch(ch) { 184 case 'a': 185 if (alignment > 0) 186 usage_resize(); 187 if (dehumanize_number(optarg, &human_num) < 0) 188 usage_resize(); 189 alignment = human_num; 190 if (alignment < 1) 191 usage_resize(); 192 break; 193 case 'i': 194 if (entry > 0) 195 usage_resize(); 196 entry = strtoul(optarg, &p, 10); 197 if (*p != 0 || entry < 1) 198 usage_resize(); 199 break; 200 case 's': 201 if (sectors > 0 || size > 0) 202 usage_resize(); 203 sectors = strtoll(optarg, &p, 10); 204 if (sectors < 1) 205 usage_resize(); 206 if (*p == '\0') 207 break; 208 if (*p == 's' || *p == 'S') { 209 if (*(p + 1) == '\0') 210 break; 211 else 212 usage_resize(); 213 } 214 if (*p == 'b' || *p == 'B') { 215 if (*(p + 1) == '\0') { 216 size = sectors; 217 sectors = 0; 218 break; 219 } else 220 usage_resize(); 221 } 222 if (dehumanize_number(optarg, &human_num) < 0) 223 usage_resize(); 224 size = human_num; 225 sectors = 0; 226 break; 227 default: 228 usage_resize(); 229 } 230 } 231 232 if (argc == optind) 233 usage_resize(); 234 235 if (entry == 0) 236 usage_resize(); 237 238 while (optind < argc) { 239 fd = gpt_open(argv[optind++]); 240 if (fd == -1) { 241 warn("unable to open device '%s'", device_name); 242 continue; 243 } 244 245 if (alignment % secsz != 0) { 246 warnx("Alignment must be a multiple of sector size;"); 247 warnx("the sector size for %s is %d bytes.", 248 device_name, secsz); 249 continue; 250 } 251 252 if (size % secsz != 0) { 253 warnx("Size in bytes must be a multiple of sector " 254 "size;"); 255 warnx("the sector size for %s is %d bytes.", 256 device_name, secsz); 257 continue; 258 } 259 if (size > 0) 260 sectors = size / secsz; 261 262 resize(fd); 263 264 gpt_close(fd); 265 } 266 267 return 0; 268 } 269
Indexes created Wed Oct 01 18:09:54 GMT 2025