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 1.5 2009/02/07 17:21:44 uebayasi 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 const char removemsg1[] = "remove -a device ..."; 53 const char removemsg2[] = "remove [-b lba] [-i index] [-s lba] " 54 "[-t type] device ..."; 55 56 static void 57 usage_remove(void) 58 { 59 60 fprintf(stderr, 61 "usage: %s %s\n" 62 " %s %s\n", 63 getprogname(), removemsg1, getprogname(), removemsg2); 64 exit(1); 65 } 66 67 static void 68 rem(int fd) 69 { 70 uuid_t uuid; 71 map_t *gpt, *tpg; 72 map_t *tbl, *lbt; 73 map_t *m; 74 struct gpt_hdr *hdr; 75 struct gpt_ent *ent; 76 unsigned int i; 77 78 gpt = map_find(MAP_TYPE_PRI_GPT_HDR); 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 /* Remove all matching entries in the map. */ 100 for (m = map_first(); m != NULL; m = m->map_next) { 101 if (m->map_type != MAP_TYPE_GPT_PART || m->map_index < 1) 102 continue; 103 if (entry > 0 && entry != m->map_index) 104 continue; 105 if (block > 0 && block != m->map_start) 106 continue; 107 if (size > 0 && size != m->map_size) 108 continue; 109 110 i = m->map_index - 1; 111 112 hdr = gpt->map_data; 113 ent = (void*)((char*)tbl->map_data + i * 114 le32toh(hdr->hdr_entsz)); 115 le_uuid_dec(&ent->ent_type, &uuid); 116 if (!uuid_is_nil(&type, NULL) && 117 !uuid_equal(&type, &uuid, NULL)) 118 continue; 119 120 /* Remove the primary entry by clearing the partition type. */ 121 uuid_create_nil((uuid_t *)&ent->ent_type, NULL); 122 123 hdr->hdr_crc_table = htole32(crc32(tbl->map_data, 124 le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz))); 125 hdr->hdr_crc_self = 0; 126 hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size))); 127 128 gpt_write(fd, gpt); 129 gpt_write(fd, tbl); 130 131 hdr = tpg->map_data; 132 ent = (void*)((char*)lbt->map_data + i * 133 le32toh(hdr->hdr_entsz)); 134 135 /* Remove the secundary entry. */ 136 uuid_create_nil((uuid_t *)&ent->ent_type, NULL); 137 138 hdr->hdr_crc_table = htole32(crc32(lbt->map_data, 139 le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz))); 140 hdr->hdr_crc_self = 0; 141 hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size))); 142 143 gpt_write(fd, lbt); 144 gpt_write(fd, tpg); 145 #ifdef __FreeBSD__ 146 printf("%sp%u removed\n", device_name, m->map_index); 147 #endif 148 #ifdef __NetBSD__ 149 printf("partition %d removed from %s\n", m->map_index, 150 device_name); 151 #endif 152 } 153 } 154 155 int 156 cmd_remove(int argc, char *argv[]) 157 { 158 char *p; 159 int ch, fd; 160 161 /* Get the remove options */ 162 while ((ch = getopt(argc, argv, "ab:i:s:t:")) != -1) { 163 switch(ch) { 164 case 'a': 165 if (all > 0) 166 usage_remove(); 167 all = 1; 168 break; 169 case 'b': 170 if (block > 0) 171 usage_remove(); 172 block = strtoll(optarg, &p, 10); 173 if (*p != 0 || block < 1) 174 usage_remove(); 175 break; 176 case 'i': 177 if (entry > 0) 178 usage_remove(); 179 entry = strtoul(optarg, &p, 10); 180 if (*p != 0 || entry < 1) 181 usage_remove(); 182 break; 183 case 's': 184 if (size > 0) 185 usage_remove(); 186 size = strtoll(optarg, &p, 10); 187 if (*p != 0 || size < 1) 188 usage_remove(); 189 break; 190 case 't': 191 if (!uuid_is_nil(&type, NULL)) 192 usage_remove(); 193 if (parse_uuid(optarg, &type) != 0) 194 usage_remove(); 195 break; 196 default: 197 usage_remove(); 198 } 199 } 200 201 if (!all ^ 202 (block > 0 || entry > 0 || size > 0 || !uuid_is_nil(&type, NULL))) 203 usage_remove(); 204 205 if (argc == optind) 206 usage_remove(); 207 208 while (optind < argc) { 209 fd = gpt_open(argv[optind++]); 210 if (fd == -1) { 211 warn("unable to open device '%s'", device_name); 212 continue; 213 } 214 215 rem(fd); 216 217 gpt_close(fd); 218 } 219 220 return (0); 221 } 222