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: }
CVSweb <webmaster@jp.NetBSD.org>