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Annotation of src/sbin/gpt/remove.c, Revision 1.6.2.1

1.1       christos    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>
1.2       christos   28: #ifdef __FBSDID
1.1       christos   29: __FBSDID("$FreeBSD: src/sbin/gpt/remove.c,v 1.10 2006/10/04 18:20:25 marcel Exp $");
1.2       christos   30: #endif
                     31: #ifdef __RCSID
1.6.2.1 ! yamt       32: __RCSID("$NetBSD: remove.c,v 1.6 2011/08/27 17:38:16 joerg Exp $");
1.2       christos   33: #endif
1.1       christos   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:
1.4       riz        52: const char removemsg1[] = "remove -a device ...";
1.6.2.1 ! yamt       53: const char removemsg2[] = "remove [-b blocknr] [-i index] [-s sectors] "
1.5       uebayasi   54:        "[-t type] device ...";
1.4       riz        55:
1.6       joerg      56: __dead static void
1.1       christos   57: usage_remove(void)
                     58: {
                     59:
                     60:        fprintf(stderr,
1.4       riz        61:            "usage: %s %s\n"
                     62:            "       %s %s\n",
                     63:            getprogname(), removemsg1, getprogname(), removemsg2);
1.1       christos   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));
1.6.2.1 ! yamt      115:                le_uuid_dec(ent->ent_type, &uuid);
1.1       christos  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. */
1.6.2.1 ! yamt      121:                uuid_create_nil(&uuid, NULL);
        !           122:                le_uuid_enc(ent->ent_type, &uuid);
1.1       christos  123:
                    124:                hdr->hdr_crc_table = htole32(crc32(tbl->map_data,
                    125:                    le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz)));
                    126:                hdr->hdr_crc_self = 0;
                    127:                hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size)));
                    128:
                    129:                gpt_write(fd, gpt);
                    130:                gpt_write(fd, tbl);
                    131:
                    132:                hdr = tpg->map_data;
                    133:                ent = (void*)((char*)lbt->map_data + i *
                    134:                    le32toh(hdr->hdr_entsz));
                    135:
1.6.2.1 ! yamt      136:                /* Remove the secondary entry. */
        !           137:                le_uuid_enc(ent->ent_type, &uuid);
1.1       christos  138:
                    139:                hdr->hdr_crc_table = htole32(crc32(lbt->map_data,
                    140:                    le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz)));
                    141:                hdr->hdr_crc_self = 0;
                    142:                hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size)));
                    143:
                    144:                gpt_write(fd, lbt);
                    145:                gpt_write(fd, tpg);
1.2       christos  146:                printf("partition %d removed from %s\n", m->map_index,
                    147:                    device_name);
1.1       christos  148:        }
                    149: }
                    150:
                    151: int
                    152: cmd_remove(int argc, char *argv[])
                    153: {
                    154:        char *p;
                    155:        int ch, fd;
1.6.2.1 ! yamt      156:        int64_t human_num;
1.1       christos  157:
                    158:        /* Get the remove options */
                    159:        while ((ch = getopt(argc, argv, "ab:i:s:t:")) != -1) {
                    160:                switch(ch) {
                    161:                case 'a':
                    162:                        if (all > 0)
                    163:                                usage_remove();
                    164:                        all = 1;
                    165:                        break;
                    166:                case 'b':
                    167:                        if (block > 0)
                    168:                                usage_remove();
1.6.2.1 ! yamt      169:                        if (dehumanize_number(optarg, &human_num) < 0)
        !           170:                                usage_remove();
        !           171:                        block = human_num;
        !           172:                        if (block < 1)
1.1       christos  173:                                usage_remove();
                    174:                        break;
                    175:                case 'i':
                    176:                        if (entry > 0)
                    177:                                usage_remove();
1.3       riz       178:                        entry = strtoul(optarg, &p, 10);
1.1       christos  179:                        if (*p != 0 || entry < 1)
                    180:                                usage_remove();
                    181:                        break;
                    182:                case 's':
                    183:                        if (size > 0)
                    184:                                usage_remove();
                    185:                        size = strtoll(optarg, &p, 10);
                    186:                        if (*p != 0 || size < 1)
                    187:                                usage_remove();
                    188:                        break;
                    189:                case 't':
                    190:                        if (!uuid_is_nil(&type, NULL))
                    191:                                usage_remove();
                    192:                        if (parse_uuid(optarg, &type) != 0)
                    193:                                usage_remove();
                    194:                        break;
                    195:                default:
                    196:                        usage_remove();
                    197:                }
                    198:        }
                    199:
                    200:        if (!all ^
                    201:            (block > 0 || entry > 0 || size > 0 || !uuid_is_nil(&type, NULL)))
                    202:                usage_remove();
                    203:
                    204:        if (argc == optind)
                    205:                usage_remove();
                    206:
                    207:        while (optind < argc) {
                    208:                fd = gpt_open(argv[optind++]);
                    209:                if (fd == -1) {
                    210:                        warn("unable to open device '%s'", device_name);
                    211:                        continue;
                    212:                }
                    213:
                    214:                rem(fd);
                    215:
                    216:                gpt_close(fd);
                    217:        }
                    218:
                    219:        return (0);
                    220: }

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