1 /*- 2 * Copyright (c) 2004 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 * $FreeBSD: src/sbin/gpt/remove.c,v 1.10 2006/10/04 18:20:25 marcel Exp $ 27 * $DragonFly: src/sbin/gpt/remove.c,v 1.2 2007/06/17 08:34:59 dillon Exp $ 28 */ 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 int all; 43 static uuid_t type; 44 static off_t block, size; 45 static unsigned int entry = NOENTRY; 46 47 static void 48 usage_remove(void) 49 { 50 51 fprintf(stderr, 52 "usage: %s -a device ...\n" 53 " %s [-b lba] [-i index] [-s lba] [-t uuid] device ...\n", 54 getprogname(), getprogname()); 55 exit(1); 56 } 57 58 static void 59 rem(int fd) 60 { 61 uuid_t uuid; 62 map_t *gpt, *tpg; 63 map_t *tbl, *lbt; 64 map_t *m; 65 struct gpt_hdr *hdr; 66 struct gpt_ent *ent; 67 unsigned int i; 68 69 gpt = map_find(MAP_TYPE_PRI_GPT_HDR); 70 if (gpt == NULL) { 71 warnx("%s: error: no primary GPT header; run create or recover", 72 device_name); 73 return; 74 } 75 76 tpg = map_find(MAP_TYPE_SEC_GPT_HDR); 77 if (tpg == NULL) { 78 warnx("%s: error: no secondary GPT header; run recover", 79 device_name); 80 return; 81 } 82 83 tbl = map_find(MAP_TYPE_PRI_GPT_TBL); 84 lbt = map_find(MAP_TYPE_SEC_GPT_TBL); 85 if (tbl == NULL || lbt == NULL) { 86 warnx("%s: error: run recover -- trust me", device_name); 87 return; 88 } 89 90 /* Remove all matching entries in the map. */ 91 for (m = map_first(); m != NULL; m = m->map_next) { 92 if (m->map_type != MAP_TYPE_GPT_PART || m->map_index == NOENTRY) 93 continue; 94 if (entry != NOENTRY && entry != m->map_index) 95 continue; 96 if (block > 0 && block != m->map_start) 97 continue; 98 if (size > 0 && size != m->map_size) 99 continue; 100 101 i = m->map_index; 102 103 hdr = gpt->map_data; 104 ent = (void*)((char*)tbl->map_data + i * 105 le32toh(hdr->hdr_entsz)); 106 le_uuid_dec(&ent->ent_type, &uuid); 107 if (!uuid_is_nil(&type, NULL) && 108 !uuid_equal(&type, &uuid, NULL)) 109 continue; 110 111 /* Remove the primary entry by clearing the partition type. */ 112 uuid_create_nil(&ent->ent_type, NULL); 113 114 hdr->hdr_crc_table = htole32(crc32(tbl->map_data, 115 le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz))); 116 hdr->hdr_crc_self = 0; 117 hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size))); 118 119 gpt_write(fd, gpt); 120 gpt_write(fd, tbl); 121 122 hdr = tpg->map_data; 123 ent = (void*)((char*)lbt->map_data + i * 124 le32toh(hdr->hdr_entsz)); 125 126 /* Remove the secundary entry. */ 127 uuid_create_nil(&ent->ent_type, NULL); 128 129 hdr->hdr_crc_table = htole32(crc32(lbt->map_data, 130 le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz))); 131 hdr->hdr_crc_self = 0; 132 hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size))); 133 134 gpt_write(fd, lbt); 135 gpt_write(fd, tpg); 136 137 printf("%ss%u removed\n", device_name, m->map_index); 138 } 139 } 140 141 int 142 cmd_remove(int argc, char *argv[]) 143 { 144 char *p; 145 int ch, fd; 146 147 /* Get the remove options */ 148 while ((ch = getopt(argc, argv, "ab:i:s:t:")) != -1) { 149 switch(ch) { 150 case 'a': 151 if (all > 0) 152 usage_remove(); 153 all = 1; 154 break; 155 case 'b': 156 if (block > 0) 157 usage_remove(); 158 block = strtoll(optarg, &p, 10); 159 if (*p != 0 || block < 1) 160 usage_remove(); 161 break; 162 case 'i': 163 if (entry != NOENTRY) 164 usage_remove(); 165 entry = strtoul(optarg, &p, 10); 166 if (*p != 0 || entry == NOENTRY) 167 usage_remove(); 168 break; 169 case 's': 170 if (size > 0) 171 usage_remove(); 172 size = strtoll(optarg, &p, 10); 173 if (*p != 0 || size < 1) 174 usage_remove(); 175 break; 176 case 't': 177 if (!uuid_is_nil(&type, NULL)) 178 usage_remove(); 179 if (parse_uuid(optarg, &type) != 0) 180 usage_remove(); 181 break; 182 default: 183 usage_remove(); 184 } 185 } 186 187 if (!all ^ 188 (block > 0 || entry != NOENTRY || size > 0 || 189 !uuid_is_nil(&type, NULL))) 190 usage_remove(); 191 192 if (argc == optind) 193 usage_remove(); 194 195 while (optind < argc) { 196 fd = gpt_open(argv[optind++]); 197 if (fd == -1) { 198 warn("unable to open device '%s'", device_name); 199 continue; 200 } 201 202 rem(fd); 203 204 gpt_close(fd); 205 } 206 207 return (0); 208 } 209