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 27 #include <sys/cdefs.h> 28 #ifdef __FBSDID 29 __FBSDID("$FreeBSD: src/sbin/gpt/remove.c,v 1.10 2006/10/04 18:20:25 marcel Exp $"); 30 #endif 31 #ifdef __RCSID 32 __RCSID("$NetBSD: remove.c,v 1.3 2007/02/16 17:13:02 riz Exp $"); 33 #endif 34 35 #include <sys/types.h> 36 37 #include <err.h> 38 #include <stddef.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <unistd.h> 43 44 #include "map.h" 45 #include "gpt.h" 46 47 static int all; 48 static uuid_t type; 49 static off_t block, size; 50 static unsigned int entry; 51 52 static void 53 usage_remove(void) 54 { 55 56 fprintf(stderr, 57 "usage: %s -a device ...\n" 58 " %s [-b lba] [-i index] [-s lba] [-t uuid] device ...\n", 59 getprogname(), getprogname()); 60 exit(1); 61 } 62 63 static void 64 rem(int fd) 65 { 66 uuid_t uuid; 67 map_t *gpt, *tpg; 68 map_t *tbl, *lbt; 69 map_t *m; 70 struct gpt_hdr *hdr; 71 struct gpt_ent *ent; 72 unsigned int i; 73 74 gpt = map_find(MAP_TYPE_PRI_GPT_HDR); 75 if (gpt == NULL) { 76 warnx("%s: error: no primary GPT header; run create or recover", 77 device_name); 78 return; 79 } 80 81 tpg = map_find(MAP_TYPE_SEC_GPT_HDR); 82 if (tpg == NULL) { 83 warnx("%s: error: no secondary GPT header; run recover", 84 device_name); 85 return; 86 } 87 88 tbl = map_find(MAP_TYPE_PRI_GPT_TBL); 89 lbt = map_find(MAP_TYPE_SEC_GPT_TBL); 90 if (tbl == NULL || lbt == NULL) { 91 warnx("%s: error: run recover -- trust me", device_name); 92 return; 93 } 94 95 /* Remove all matching entries in the map. */ 96 for (m = map_first(); m != NULL; m = m->map_next) { 97 if (m->map_type != MAP_TYPE_GPT_PART || m->map_index < 1) 98 continue; 99 if (entry > 0 && entry != m->map_index) 100 continue; 101 if (block > 0 && block != m->map_start) 102 continue; 103 if (size > 0 && size != m->map_size) 104 continue; 105 106 i = m->map_index - 1; 107 108 hdr = gpt->map_data; 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(&type, NULL) && 113 !uuid_equal(&type, &uuid, NULL)) 114 continue; 115 116 /* Remove the primary entry by clearing the partition type. */ 117 uuid_create_nil((uuid_t *)&ent->ent_type, NULL); 118 119 hdr->hdr_crc_table = htole32(crc32(tbl->map_data, 120 le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz))); 121 hdr->hdr_crc_self = 0; 122 hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size))); 123 124 gpt_write(fd, gpt); 125 gpt_write(fd, tbl); 126 127 hdr = tpg->map_data; 128 ent = (void*)((char*)lbt->map_data + i * 129 le32toh(hdr->hdr_entsz)); 130 131 /* Remove the secundary entry. */ 132 uuid_create_nil((uuid_t *)&ent->ent_type, NULL); 133 134 hdr->hdr_crc_table = htole32(crc32(lbt->map_data, 135 le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz))); 136 hdr->hdr_crc_self = 0; 137 hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size))); 138 139 gpt_write(fd, lbt); 140 gpt_write(fd, tpg); 141 #ifdef __FreeBSD__ 142 printf("%sp%u removed\n", device_name, m->map_index); 143 #endif 144 #ifdef __NetBSD__ 145 printf("partition %d removed from %s\n", m->map_index, 146 device_name); 147 #endif 148 } 149 } 150 151 int 152 cmd_remove(int argc, char *argv[]) 153 { 154 char *p; 155 int ch, fd; 156 157 /* Get the remove options */ 158 while ((ch = getopt(argc, argv, "ab:i:s:t:")) != -1) { 159 switch(ch) { 160 case 'a': 161 if (all > 0) 162 usage_remove(); 163 all = 1; 164 break; 165 case 'b': 166 if (block > 0) 167 usage_remove(); 168 block = strtoll(optarg, &p, 10); 169 if (*p != 0 || block < 1) 170 usage_remove(); 171 break; 172 case 'i': 173 if (entry > 0) 174 usage_remove(); 175 entry = strtoul(optarg, &p, 10); 176 if (*p != 0 || entry < 1) 177 usage_remove(); 178 break; 179 case 's': 180 if (size > 0) 181 usage_remove(); 182 size = strtoll(optarg, &p, 10); 183 if (*p != 0 || size < 1) 184 usage_remove(); 185 break; 186 case 't': 187 if (!uuid_is_nil(&type, NULL)) 188 usage_remove(); 189 if (parse_uuid(optarg, &type) != 0) 190 usage_remove(); 191 break; 192 default: 193 usage_remove(); 194 } 195 } 196 197 if (!all ^ 198 (block > 0 || entry > 0 || size > 0 || !uuid_is_nil(&type, NULL))) 199 usage_remove(); 200 201 if (argc == optind) 202 usage_remove(); 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 rem(fd); 212 213 gpt_close(fd); 214 } 215 216 return (0); 217 } 218