sbin/gpt/add.c

   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 #include <sys/cdefs.h>
  28 __FBSDID("$FreeBSD$");
  29
  30 #include <sys/types.h>
  31
  32 #include <err.h>
  33 #include <stddef.h>
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <string.h>
  37 #include <unistd.h>
  38
  39 #include "map.h"
  40 #include "gpt.h"
  41
  42 static uuid_t type;
  43 static off_t block, size;
  44 static unsigned int entry;
  45
  46 static void
  47 usage_add(void)
  48 {
  49
  50         fprintf(stderr,
  51             "usage: %s [-b lba] [-i index] [-s lba] [-t uuid] device ...\n",
  52             getprogname());
  53         exit(1);
  54 }
  55
  56 static void
  57 add(int fd)
  58 {
  59         map_t *gpt, *tpg;
  60         map_t *tbl, *lbt;
  61         map_t *map;
  62         struct gpt_hdr *hdr;
  63         struct gpt_ent *ent;
  64         unsigned int i;
  65
  66         gpt = map_find(MAP_TYPE_PRI_GPT_HDR);
  67         if (gpt == NULL) {
  68                 warnx("%s: error: no primary GPT header; run create or recover",
  69                     device_name);
  70                 return;
  71         }
  72
  73         tpg = map_find(MAP_TYPE_SEC_GPT_HDR);
  74         if (tpg == NULL) {
  75                 warnx("%s: error: no secondary GPT header; run recover",
  76                     device_name);
  77                 return;
  78         }
  79
  80         tbl = map_find(MAP_TYPE_PRI_GPT_TBL);
  81         lbt = map_find(MAP_TYPE_SEC_GPT_TBL);
  82         if (tbl == NULL || lbt == NULL) {
  83                 warnx("%s: error: run recover -- trust me", device_name);
  84                 return;
  85         }
  86
  87         hdr = gpt->map_data;
  88         if (entry > le32toh(hdr->hdr_entries)) {
  89                 warnx("%s: error: index %u out of range (%u max)", device_name,
  90                     entry, le32toh(hdr->hdr_entries));
  91                 return;
  92         }
  93
  94         if (entry > 0) {
  95                 i = entry - 1;
  96                 ent = (void*)((char*)tbl->map_data + i *
  97                     le32toh(hdr->hdr_entsz));
  98                 if (!uuid_is_nil(&ent->ent_type, NULL)) {
  99                         warnx("%s: error: entry at index %u is not free",
 100                             device_name, entry);
 101                         return;
 102                 }
 103         } else {
 104                 /* Find empty slot in GPT table. */
 105                 for (i = 0; i < le32toh(hdr->hdr_entries); i++) {
 106                         ent = (void*)((char*)tbl->map_data + i *
 107                             le32toh(hdr->hdr_entsz));
 108                         if (uuid_is_nil(&ent->ent_type, NULL))
 109                                 break;
 110                 }
 111                 if (i == le32toh(hdr->hdr_entries)) {
 112                         warnx("%s: error: no available table entries",
 113                             device_name);
 114                         return;
 115                 }
 116         }
 117
 118         map = map_alloc(block, size);
 119         if (map == NULL) {
 120                 warnx("%s: error: no space available on device", device_name);
 121                 return;
 122         }
 123
 124         le_uuid_enc(&ent->ent_type, &type);
 125         ent->ent_lba_start = htole64(map->map_start);
 126         ent->ent_lba_end = htole64(map->map_start + map->map_size - 1LL);
 127
 128         hdr->hdr_crc_table = htole32(crc32(tbl->map_data,
 129             le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz)));
 130         hdr->hdr_crc_self = 0;
 131         hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size)));
 132
 133         gpt_write(fd, gpt);
 134         gpt_write(fd, tbl);
 135
 136         hdr = tpg->map_data;
 137         ent = (void*)((char*)lbt->map_data + i * le32toh(hdr->hdr_entsz));
 138
 139         le_uuid_enc(&ent->ent_type, &type);
 140         ent->ent_lba_start = htole64(map->map_start);
 141         ent->ent_lba_end = htole64(map->map_start + map->map_size - 1LL);
 142
 143         hdr->hdr_crc_table = htole32(crc32(lbt->map_data,
 144             le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz)));
 145         hdr->hdr_crc_self = 0;
 146         hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size)));
 147
 148         gpt_write(fd, lbt);
 149         gpt_write(fd, tpg);
 150
 151         printf("%sp%u added\n", device_name, i + 1);
 152 }
 153
 154 int
 155 cmd_add(int argc, char *argv[])
 156 {
 157         char *p;
 158         int ch, fd;
 159
 160         /* Get the migrate options */
 161         while ((ch = getopt(argc, argv, "b:i:s:t:")) != -1) {
 162                 switch(ch) {
 163                 case 'b':
 164                         if (block > 0)
 165                                 usage_add();
 166                         block = strtoll(optarg, &p, 10);
 167                         if (*p != 0 || block < 1)
 168                                 usage_add();
 169                         break;
 170                 case 'i':
 171                         if (entry > 0)
 172                                 usage_add();
 173                         entry = strtol(optarg, &p, 10);
 174                         if (*p != 0 || entry < 1)
 175                                 usage_add();
 176                         break;
 177                 case 's':
 178                         if (size > 0)
 179                                 usage_add();
 180                         size = strtoll(optarg, &p, 10);
 181                         if (*p != 0 || size < 1)
 182                                 usage_add();
 183                         break;
 184                 case 't':
 185                         if (!uuid_is_nil(&type, NULL))
 186                                 usage_add();
 187                         if (parse_uuid(optarg, &type) != 0)
 188                                 usage_add();
 189                         break;
 190                 default:
 191                         usage_add();
 192                 }
 193         }
 194
 195         if (argc == optind)
 196                 usage_add();
 197
 198         /* Create UFS partitions by default. */
 199         if (uuid_is_nil(&type, NULL)) {
 200                 uuid_t ufs = GPT_ENT_TYPE_FREEBSD_UFS;
 201                 type = ufs;
 202         }
 203
 204         while (optind < argc) {
 205                 fd = gpt_open(argv[optind++]);
 206                 if (fd == -1) {
 207                         warn("unable to open device '%s'", device_name);
 208                         continue;
 209                 }
 210
 211                 add(fd);
 212
 213                 gpt_close(fd);
 214         }
 215
 216         return (0);
 217 }