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Annotation of src/sbin/gpt/gpt.c, Revision 1.46

1.1       christos    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:  * CRC32 code derived from work by Gary S. Brown.
                     27:  */
                     28:
1.31      christos   29: #if HAVE_NBTOOL_CONFIG_H
                     30: #include "nbtool_config.h"
                     31: #endif
                     32:
1.1       christos   33: #include <sys/cdefs.h>
1.2       christos   34: #ifdef __FBSDID
1.1       christos   35: __FBSDID("$FreeBSD: src/sbin/gpt/gpt.c,v 1.16 2006/07/07 02:44:23 marcel Exp $");
1.2       christos   36: #endif
                     37: #ifdef __RCSID
1.46    ! christos   38: __RCSID("$NetBSD: gpt.c,v 1.45 2015/11/29 14:03:35 christos Exp $");
1.2       christos   39: #endif
1.1       christos   40:
                     41: #include <sys/param.h>
                     42: #include <sys/types.h>
                     43: #include <sys/stat.h>
1.2       christos   44: #include <sys/ioctl.h>
1.25      jakllsch   45: #include <sys/bootblock.h>
1.1       christos   46:
                     47: #include <err.h>
                     48: #include <errno.h>
                     49: #include <fcntl.h>
                     50: #include <paths.h>
                     51: #include <stddef.h>
1.42      christos   52: #include <stdarg.h>
1.1       christos   53: #include <stdio.h>
                     54: #include <stdlib.h>
                     55: #include <string.h>
                     56: #include <unistd.h>
1.32      christos   57: #include <ctype.h>
1.1       christos   58:
                     59: #include "map.h"
                     60: #include "gpt.h"
                     61:
                     62: char   device_path[MAXPATHLEN];
1.9       uebayasi   63: const char *device_arg;
1.39      mlelstv    64: const char *device_name;
1.1       christos   65:
                     66: off_t  mediasz;
                     67:
                     68: u_int  parts;
                     69: u_int  secsz;
                     70:
1.46    ! christos   71: int    readonly, verbose, quiet, nosync;
        !            72:
        !            73: static int modified;
1.1       christos   74:
                     75: static uint32_t crc32_tab[] = {
                     76:        0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
                     77:        0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
                     78:        0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
                     79:        0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
                     80:        0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
                     81:        0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
                     82:        0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
                     83:        0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
                     84:        0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
                     85:        0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
                     86:        0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
                     87:        0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
                     88:        0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
                     89:        0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
                     90:        0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
                     91:        0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
                     92:        0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
                     93:        0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
                     94:        0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
                     95:        0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
                     96:        0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
                     97:        0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
                     98:        0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
                     99:        0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
                    100:        0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
                    101:        0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
                    102:        0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
                    103:        0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
                    104:        0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
                    105:        0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
                    106:        0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
                    107:        0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
                    108:        0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
                    109:        0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
                    110:        0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
                    111:        0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
                    112:        0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
                    113:        0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
                    114:        0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
                    115:        0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
                    116:        0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
                    117:        0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
                    118:        0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
                    119: };
                    120:
                    121: uint32_t
                    122: crc32(const void *buf, size_t size)
                    123: {
                    124:        const uint8_t *p;
                    125:        uint32_t crc;
                    126:
                    127:        p = buf;
                    128:        crc = ~0U;
                    129:
                    130:        while (size--)
                    131:                crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8);
                    132:
                    133:        return crc ^ ~0U;
                    134: }
                    135:
                    136: uint8_t *
                    137: utf16_to_utf8(uint16_t *s16)
                    138: {
                    139:        static uint8_t *s8 = NULL;
                    140:        static size_t s8len = 0;
                    141:        size_t s8idx, s16idx, s16len;
                    142:        uint32_t utfchar;
                    143:        unsigned int c;
                    144:
                    145:        s16len = 0;
                    146:        while (s16[s16len++] != 0)
                    147:                ;
                    148:        if (s8len < s16len * 3) {
                    149:                if (s8 != NULL)
                    150:                        free(s8);
                    151:                s8len = s16len * 3;
                    152:                s8 = calloc(s16len, 3);
                    153:        }
                    154:        s8idx = s16idx = 0;
                    155:        while (s16idx < s16len) {
                    156:                utfchar = le16toh(s16[s16idx++]);
                    157:                if ((utfchar & 0xf800) == 0xd800) {
                    158:                        c = le16toh(s16[s16idx]);
                    159:                        if ((utfchar & 0x400) != 0 || (c & 0xfc00) != 0xdc00)
                    160:                                utfchar = 0xfffd;
                    161:                        else
                    162:                                s16idx++;
                    163:                }
                    164:                if (utfchar < 0x80) {
                    165:                        s8[s8idx++] = utfchar;
                    166:                } else if (utfchar < 0x800) {
                    167:                        s8[s8idx++] = 0xc0 | (utfchar >> 6);
                    168:                        s8[s8idx++] = 0x80 | (utfchar & 0x3f);
                    169:                } else if (utfchar < 0x10000) {
                    170:                        s8[s8idx++] = 0xe0 | (utfchar >> 12);
                    171:                        s8[s8idx++] = 0x80 | ((utfchar >> 6) & 0x3f);
                    172:                        s8[s8idx++] = 0x80 | (utfchar & 0x3f);
                    173:                } else if (utfchar < 0x200000) {
                    174:                        s8[s8idx++] = 0xf0 | (utfchar >> 18);
                    175:                        s8[s8idx++] = 0x80 | ((utfchar >> 12) & 0x3f);
                    176:                        s8[s8idx++] = 0x80 | ((utfchar >> 6) & 0x3f);
                    177:                        s8[s8idx++] = 0x80 | (utfchar & 0x3f);
                    178:                }
                    179:        }
                    180:        return (s8);
                    181: }
                    182:
                    183: void
                    184: utf8_to_utf16(const uint8_t *s8, uint16_t *s16, size_t s16len)
                    185: {
                    186:        size_t s16idx, s8idx, s8len;
1.2       christos  187:        uint32_t utfchar = 0;
1.1       christos  188:        unsigned int c, utfbytes;
                    189:
                    190:        s8len = 0;
                    191:        while (s8[s8len++] != 0)
                    192:                ;
                    193:        s8idx = s16idx = 0;
                    194:        utfbytes = 0;
                    195:        do {
                    196:                c = s8[s8idx++];
                    197:                if ((c & 0xc0) != 0x80) {
                    198:                        /* Initial characters. */
                    199:                        if (utfbytes != 0) {
                    200:                                /* Incomplete encoding. */
1.17      matt      201:                                s16[s16idx++] = htole16(0xfffd);
1.1       christos  202:                                if (s16idx == s16len) {
                    203:                                        s16[--s16idx] = 0;
                    204:                                        return;
                    205:                                }
                    206:                        }
                    207:                        if ((c & 0xf8) == 0xf0) {
                    208:                                utfchar = c & 0x07;
                    209:                                utfbytes = 3;
                    210:                        } else if ((c & 0xf0) == 0xe0) {
                    211:                                utfchar = c & 0x0f;
                    212:                                utfbytes = 2;
                    213:                        } else if ((c & 0xe0) == 0xc0) {
                    214:                                utfchar = c & 0x1f;
                    215:                                utfbytes = 1;
                    216:                        } else {
                    217:                                utfchar = c & 0x7f;
                    218:                                utfbytes = 0;
                    219:                        }
                    220:                } else {
                    221:                        /* Followup characters. */
                    222:                        if (utfbytes > 0) {
                    223:                                utfchar = (utfchar << 6) + (c & 0x3f);
                    224:                                utfbytes--;
                    225:                        } else if (utfbytes == 0)
                    226:                                utfbytes = -1;
                    227:                }
                    228:                if (utfbytes == 0) {
                    229:                        if (utfchar >= 0x10000 && s16idx + 2 >= s16len)
1.17      matt      230:                                utfchar = 0xfffd;
1.1       christos  231:                        if (utfchar >= 0x10000) {
1.16      matt      232:                                s16[s16idx++] =
                    233:                                    htole16(0xd800 | ((utfchar>>10)-0x40));
                    234:                                s16[s16idx++] =
                    235:                                    htole16(0xdc00 | (utfchar & 0x3ff));
1.1       christos  236:                        } else
1.16      matt      237:                                s16[s16idx++] = htole16(utfchar);
1.1       christos  238:                        if (s16idx == s16len) {
                    239:                                s16[--s16idx] = 0;
                    240:                                return;
                    241:                        }
                    242:                }
                    243:        } while (c != 0);
                    244: }
                    245:
                    246: void*
                    247: gpt_read(int fd, off_t lba, size_t count)
                    248: {
                    249:        off_t ofs;
                    250:        void *buf;
                    251:
                    252:        count *= secsz;
                    253:        buf = malloc(count);
                    254:        if (buf == NULL)
                    255:                return (NULL);
                    256:
                    257:        ofs = lba * secsz;
                    258:        if (lseek(fd, ofs, SEEK_SET) == ofs &&
                    259:            read(fd, buf, count) == (ssize_t)count)
                    260:                return (buf);
                    261:
                    262:        free(buf);
                    263:        return (NULL);
                    264: }
                    265:
                    266: int
                    267: gpt_write(int fd, map_t *map)
                    268: {
                    269:        off_t ofs;
                    270:        size_t count;
                    271:
                    272:        count = map->map_size * secsz;
                    273:        ofs = map->map_start * secsz;
1.46    ! christos  274:        if (lseek(fd, ofs, SEEK_SET) != ofs ||
        !           275:            write(fd, map->map_data, count) != (ssize_t)count)
        !           276:                return -1;
        !           277:        modified = 1;
        !           278:        return 0;
1.1       christos  279: }
                    280:
                    281: static int
                    282: gpt_mbr(int fd, off_t lba)
                    283: {
                    284:        struct mbr *mbr;
                    285:        map_t *m, *p;
                    286:        off_t size, start;
                    287:        unsigned int i, pmbr;
                    288:
                    289:        mbr = gpt_read(fd, lba, 1);
1.42      christos  290:        if (mbr == NULL) {
                    291:                if (!quiet)
                    292:                        warn("%s: read failed", device_name);
1.1       christos  293:                return (-1);
1.42      christos  294:        }
1.1       christos  295:
                    296:        if (mbr->mbr_sig != htole16(MBR_SIG)) {
                    297:                if (verbose)
1.42      christos  298:                        gpt_msg("MBR not found at sector %ju", (uintmax_t)lba);
1.1       christos  299:                free(mbr);
                    300:                return (0);
                    301:        }
                    302:
                    303:        /*
                    304:         * Differentiate between a regular MBR and a PMBR. This is more
                    305:         * convenient in general. A PMBR is one with a single partition
                    306:         * of type 0xee.
                    307:         */
                    308:        pmbr = 0;
                    309:        for (i = 0; i < 4; i++) {
1.25      jakllsch  310:                if (mbr->mbr_part[i].part_typ == MBR_PTYPE_UNUSED)
1.1       christos  311:                        continue;
1.25      jakllsch  312:                if (mbr->mbr_part[i].part_typ == MBR_PTYPE_PMBR)
1.1       christos  313:                        pmbr++;
                    314:                else
                    315:                        break;
                    316:        }
                    317:        if (pmbr && i == 4 && lba == 0) {
1.42      christos  318:                if (pmbr != 1 && !quiet)
                    319:                        warnx("%s: Suspicious PMBR at sector %ju",
                    320:                            device_name, (uintmax_t)lba);
1.1       christos  321:                else if (verbose > 1)
1.42      christos  322:                        gpt_msg("PMBR at sector %ju", (uintmax_t)lba);
1.1       christos  323:                p = map_add(lba, 1LL, MAP_TYPE_PMBR, mbr);
                    324:                return ((p == NULL) ? -1 : 0);
                    325:        }
1.42      christos  326:        if (pmbr && !quiet)
                    327:                warnx("%s: Suspicious MBR at sector %ju", device_name,
                    328:                    (uintmax_t)lba);
1.1       christos  329:        else if (verbose > 1)
1.42      christos  330:                gpt_msg("MBR at sector %ju", (uintmax_t)lba);
1.1       christos  331:
                    332:        p = map_add(lba, 1LL, MAP_TYPE_MBR, mbr);
                    333:        if (p == NULL)
                    334:                return (-1);
                    335:        for (i = 0; i < 4; i++) {
1.25      jakllsch  336:                if (mbr->mbr_part[i].part_typ == MBR_PTYPE_UNUSED ||
                    337:                    mbr->mbr_part[i].part_typ == MBR_PTYPE_PMBR)
1.1       christos  338:                        continue;
                    339:                start = le16toh(mbr->mbr_part[i].part_start_hi);
                    340:                start = (start << 16) + le16toh(mbr->mbr_part[i].part_start_lo);
                    341:                size = le16toh(mbr->mbr_part[i].part_size_hi);
                    342:                size = (size << 16) + le16toh(mbr->mbr_part[i].part_size_lo);
                    343:                if (start == 0 && size == 0) {
                    344:                        warnx("%s: Malformed MBR at sector %llu", device_name,
                    345:                            (long long)lba);
                    346:                        continue;
                    347:                }
                    348:                /* start is relative to the offset of the MBR itself. */
                    349:                start += lba;
                    350:                if (verbose > 2)
1.42      christos  351:                        gpt_msg("MBR part: type=%d, start=%ju, size=%ju",
                    352:                            mbr->mbr_part[i].part_typ,
                    353:                            (uintmax_t)start, (uintmax_t)size);
1.25      jakllsch  354:                if (mbr->mbr_part[i].part_typ != MBR_PTYPE_EXT_LBA) {
1.1       christos  355:                        m = map_add(start, size, MAP_TYPE_MBR_PART, p);
                    356:                        if (m == NULL)
                    357:                                return (-1);
                    358:                        m->map_index = i + 1;
                    359:                } else {
                    360:                        if (gpt_mbr(fd, start) == -1)
                    361:                                return (-1);
                    362:                }
                    363:        }
                    364:        return (0);
                    365: }
                    366:
1.29      jnemeth   367: int
1.11      christos  368: gpt_gpt(int fd, off_t lba, int found)
1.1       christos  369: {
                    370:        off_t size;
                    371:        struct gpt_ent *ent;
                    372:        struct gpt_hdr *hdr;
1.34      christos  373:        char *p;
1.1       christos  374:        map_t *m;
                    375:        size_t blocks, tblsz;
                    376:        unsigned int i;
                    377:        uint32_t crc;
                    378:
                    379:        hdr = gpt_read(fd, lba, 1);
                    380:        if (hdr == NULL)
                    381:                return (-1);
                    382:
                    383:        if (memcmp(hdr->hdr_sig, GPT_HDR_SIG, sizeof(hdr->hdr_sig)))
                    384:                goto fail_hdr;
                    385:
                    386:        crc = le32toh(hdr->hdr_crc_self);
                    387:        hdr->hdr_crc_self = 0;
                    388:        if (crc32(hdr, le32toh(hdr->hdr_size)) != crc) {
                    389:                if (verbose)
                    390:                        warnx("%s: Bad CRC in GPT header at sector %llu",
                    391:                            device_name, (long long)lba);
                    392:                goto fail_hdr;
                    393:        }
                    394:
                    395:        tblsz = le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz);
                    396:        blocks = tblsz / secsz + ((tblsz % secsz) ? 1 : 0);
                    397:
                    398:        /* Use generic pointer to deal with hdr->hdr_entsz != sizeof(*ent). */
                    399:        p = gpt_read(fd, le64toh(hdr->hdr_lba_table), blocks);
1.11      christos  400:        if (p == NULL) {
                    401:                if (found) {
                    402:                        if (verbose)
                    403:                                warn("%s: Cannot read LBA table at sector %llu",
1.12      christos  404:                                    device_name, (unsigned long long)
                    405:                                    le64toh(hdr->hdr_lba_table));
1.11      christos  406:                        return (-1);
                    407:                }
                    408:                goto fail_hdr;
                    409:        }
1.1       christos  410:
                    411:        if (crc32(p, tblsz) != le32toh(hdr->hdr_crc_table)) {
                    412:                if (verbose)
                    413:                        warnx("%s: Bad CRC in GPT table at sector %llu",
                    414:                            device_name,
                    415:                            (long long)le64toh(hdr->hdr_lba_table));
                    416:                goto fail_ent;
                    417:        }
                    418:
                    419:        if (verbose > 1)
                    420:                warnx("%s: %s GPT at sector %llu", device_name,
                    421:                    (lba == 1) ? "Pri" : "Sec", (long long)lba);
                    422:
                    423:        m = map_add(lba, 1, (lba == 1)
                    424:            ? MAP_TYPE_PRI_GPT_HDR : MAP_TYPE_SEC_GPT_HDR, hdr);
                    425:        if (m == NULL)
                    426:                return (-1);
                    427:
                    428:        m = map_add(le64toh(hdr->hdr_lba_table), blocks, (lba == 1)
                    429:            ? MAP_TYPE_PRI_GPT_TBL : MAP_TYPE_SEC_GPT_TBL, p);
                    430:        if (m == NULL)
                    431:                return (-1);
                    432:
                    433:        if (lba != 1)
1.11      christos  434:                return (1);
1.1       christos  435:
                    436:        for (i = 0; i < le32toh(hdr->hdr_entries); i++) {
                    437:                ent = (void*)(p + i * le32toh(hdr->hdr_entsz));
1.34      christos  438:                if (gpt_uuid_is_nil(ent->ent_type))
1.1       christos  439:                        continue;
                    440:
                    441:                size = le64toh(ent->ent_lba_end) - le64toh(ent->ent_lba_start) +
                    442:                    1LL;
                    443:                if (verbose > 2) {
1.34      christos  444:                        char buf[128];
                    445:                        gpt_uuid_snprintf(buf, sizeof(buf), "%s",
                    446:                            ent->ent_type);
                    447:                        warnx("%s: GPT partition: type=%s, start=%llu, "
                    448:                            "size=%llu", device_name, buf,
1.1       christos  449:                            (long long)le64toh(ent->ent_lba_start),
                    450:                            (long long)size);
                    451:                }
                    452:                m = map_add(le64toh(ent->ent_lba_start), size,
                    453:                    MAP_TYPE_GPT_PART, ent);
                    454:                if (m == NULL)
                    455:                        return (-1);
                    456:                m->map_index = i + 1;
                    457:        }
1.11      christos  458:        return (1);
1.1       christos  459:
                    460:  fail_ent:
                    461:        free(p);
                    462:
                    463:  fail_hdr:
                    464:        free(hdr);
                    465:        return (0);
                    466: }
                    467:
                    468: int
1.42      christos  469: gpt_open(const char *dev, int flags)
1.1       christos  470: {
                    471:        struct stat sb;
1.11      christos  472:        int fd, mode, found;
1.45      christos  473:        off_t devsz;
1.1       christos  474:
                    475:        mode = readonly ? O_RDONLY : O_RDWR|O_EXCL;
                    476:
1.39      mlelstv   477:        device_arg = device_name = dev;
1.2       christos  478:        fd = opendisk(dev, mode, device_path, sizeof(device_path), 0);
1.42      christos  479:        if (fd == -1) {
                    480:                if (!quiet)
                    481:                        warn("Cannot open `%s'", device_name);
1.2       christos  482:                return -1;
1.42      christos  483:        }
                    484:        device_name = device_path;
1.1       christos  485:
1.42      christos  486:        if (fstat(fd, &sb) == -1) {
                    487:                if (!quiet)
                    488:                        warn("Cannot stat `%s'", device_name);
1.1       christos  489:                goto close;
1.42      christos  490:        }
1.1       christos  491:
                    492:        if ((sb.st_mode & S_IFMT) != S_IFREG) {
1.44      christos  493:                if (secsz == 0) {
1.43      jnemeth   494: #ifdef DIOCGSECTORSIZE
1.44      christos  495:                        if (ioctl(fd, DIOCGSECTORSIZE, &secsz) == -1) {
                    496:                                if (!quiet)
                    497:                                        warn("Cannot get sector size for `%s'",
                    498:                                            device_name);
                    499:                                goto close;
                    500:                        }
                    501: #endif
                    502:                        if (secsz == 0) {
                    503:                                if (!quiet)
                    504:                                        warnx("Sector size for `%s' can't be 0",
                    505:                                            device_name);
                    506:                                goto close;
                    507:                        }
1.42      christos  508:                }
1.44      christos  509:                if (mediasz == 0) {
                    510: #ifdef DIOCGMEDIASIZE
                    511:                        if (ioctl(fd, DIOCGMEDIASIZE, &mediasz) == -1) {
                    512:                                if (!quiet)
                    513:                                        warn("Cannot get media size for `%s'",
                    514:                                        device_name);
                    515:                                goto close;
                    516:                        }
1.43      jnemeth   517: #endif
1.44      christos  518:                        if (mediasz == 0) {
                    519:                                if (!quiet)
                    520:                                        warnx("Media size for `%s' can't be 0",
                    521:                                            device_name);
                    522:                                goto close;
                    523:                        }
                    524:                }
1.1       christos  525:        } else {
1.36      christos  526:                if (secsz == 0)
                    527:                        secsz = 512;    /* Fixed size for files. */
                    528:                if (mediasz == 0) {
                    529:                        if (sb.st_size % secsz) {
                    530:                                errno = EINVAL;
                    531:                                goto close;
                    532:                        }
                    533:                        mediasz = sb.st_size;
1.1       christos  534:                }
                    535:        }
                    536:
                    537:        /*
                    538:         * We require an absolute minimum of 6 sectors. One for the MBR,
                    539:         * 2 for the GPT header, 2 for the GPT table and one to hold some
                    540:         * user data. Let's catch this extreme border case here so that
                    541:         * we don't have to worry about it later.
                    542:         */
1.45      christos  543:        devsz = mediasz / secsz;
                    544:        if (devsz < 6) {
1.42      christos  545:                if (!quiet)
1.45      christos  546:                        warnx("Need 6 sectors on '%s' we have %ju",
                    547:                            device_name, (uintmax_t)devsz);
1.1       christos  548:                goto close;
                    549:        }
                    550:
1.42      christos  551:        if (verbose) {
                    552:                gpt_msg("mediasize=%ju; sectorsize=%u; blocks=%ju",
1.45      christos  553:                    (uintmax_t)mediasz, secsz, (uintmax_t)devsz);
1.42      christos  554:        }
1.1       christos  555:
1.45      christos  556:        map_init(devsz);
1.1       christos  557:
                    558:        if (gpt_mbr(fd, 0LL) == -1)
                    559:                goto close;
1.11      christos  560:        if ((found = gpt_gpt(fd, 1LL, 1)) == -1)
1.1       christos  561:                goto close;
1.45      christos  562:        if (gpt_gpt(fd, devsz - 1LL, found) == -1)
1.1       christos  563:                goto close;
                    564:
                    565:        return (fd);
                    566:
                    567:  close:
                    568:        close(fd);
                    569:        return (-1);
                    570: }
                    571:
                    572: void
                    573: gpt_close(int fd)
                    574: {
1.46    ! christos  575:        int bits;
        !           576:
        !           577:        if (modified && !nosync)
        !           578:                if (ioctl(fd, DIOCMWEDGES, &bits) == -1)
        !           579:                        warn("Can't update wedge information");
        !           580:
1.1       christos  581:        /* XXX post processing? */
                    582:        close(fd);
                    583: }
                    584:
1.42      christos  585: void
                    586: gpt_msg(const char *fmt, ...)
                    587: {
                    588:        va_list ap;
                    589:        printf("%s: ", device_name);
                    590:        va_start(ap, fmt);
                    591:        vprintf(fmt, ap);
                    592:        va_end(ap);
                    593:        printf("\n");
                    594: }

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