Annotation of src/sbin/gpt/biosboot.c, Revision 1.22
1.22 ! christos 1: /* $NetBSD: biosboot.c,v 1.21 2015/12/03 01:07:28 christos Exp $ */
1.1 jakllsch 2:
3: /*
1.6 jakllsch 4: * Copyright (c) 2009 The NetBSD Foundation, Inc.
1.1 jakllsch 5: * All rights reserved.
1.6 jakllsch 6: *
1.1 jakllsch 7: * This code is derived from software contributed to the NetBSD Foundation
8: * by Mike M. Volokhov. Development of this software was supported by the
9: * Google Summer of Code program.
10: * The GSoC project was mentored by Allen Briggs and Joerg Sonnenberger.
11: *
12: * Redistribution and use in source and binary forms, with or without
13: * modification, are permitted provided that the following conditions
14: * are met:
15: * 1. Redistributions of source code must retain the above copyright
16: * notice, this list of conditions and the following disclaimer.
17: * 2. Redistributions in binary form must reproduce the above copyright
18: * notice, this list of conditions and the following disclaimer in the
19: * documentation and/or other materials provided with the distribution.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
22: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
23: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
25: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31: * POSSIBILITY OF SUCH DAMAGE.
32: */
33:
1.10 christos 34: #if HAVE_NBTOOL_CONFIG_H
35: #include "nbtool_config.h"
36: #endif
37:
1.1 jakllsch 38: #include <sys/cdefs.h>
39: #ifdef __RCSID
1.22 ! christos 40: __RCSID("$NetBSD: biosboot.c,v 1.21 2015/12/03 01:07:28 christos Exp $");
1.1 jakllsch 41: #endif
42:
43: #include <sys/stat.h>
44: #include <sys/types.h>
45: #include <sys/ioctl.h>
1.14 christos 46: #ifdef DIOCGWEDGEINFO
1.1 jakllsch 47: #include <sys/disk.h>
1.13 joerg 48: #endif
1.1 jakllsch 49: #include <sys/param.h>
50: #include <sys/bootblock.h>
51:
52: #include <err.h>
53: #include <fcntl.h>
54: #include <paths.h>
55: #include <stddef.h>
56: #include <stdio.h>
57: #include <stdlib.h>
58: #include <string.h>
59: #include <unistd.h>
60:
61: #include "map.h"
62: #include "gpt.h"
1.16 christos 63: #include "gpt_private.h"
1.1 jakllsch 64:
65: #define DEFAULT_BOOTDIR "/usr/mdec"
1.3 jakllsch 66: #define DEFAULT_BOOTCODE "gptmbr.bin"
1.1 jakllsch 67:
1.17 christos 68: static int cmd_biosboot(gpt_t, int, char *[]);
1.1 jakllsch 69:
1.17 christos 70: static const char *biosboothelp[] = {
1.21 christos 71: "[-c bootcode] [-i index] [-L label]",
1.20 christos 72: #if notyet
1.21 christos 73: "[-a alignment] [-b blocknr] [-i index] [-l label]",
74: "[-s size] [-t type]",
1.20 christos 75: #endif
1.17 christos 76: };
77:
78: struct gpt_cmd c_biosboot = {
79: "biosboot",
80: cmd_biosboot,
81: biosboothelp, __arraycount(biosboothelp),
82: 0,
83: };
84:
85: #define usage() gpt_usage(NULL, &c_biosboot)
1.1 jakllsch 86:
87: static struct mbr*
1.21 christos 88: read_boot(gpt_t gpt, const char *bootpath)
1.1 jakllsch 89: {
1.21 christos 90: int bfd, ret = -1;
1.1 jakllsch 91: struct mbr *buf;
92: struct stat st;
1.21 christos 93: char *bp;
1.1 jakllsch 94:
1.16 christos 95: buf = NULL;
96: bfd = -1;
97:
98: if (bootpath == NULL)
1.21 christos 99: bp = strdup(DEFAULT_BOOTDIR "/" DEFAULT_BOOTCODE);
1.16 christos 100: else if (*bootpath == '/')
1.21 christos 101: bp = strdup(bootpath);
1.16 christos 102: else {
1.21 christos 103: if (asprintf(&bp, "%s/%s", DEFAULT_BOOTDIR, bootpath) < 0)
104: bp = NULL;
1.16 christos 105: }
106:
1.21 christos 107: if (bp == NULL) {
1.16 christos 108: gpt_warn(gpt, "Can't allocate memory for bootpath");
109: goto fail;
110: }
111:
112: if ((buf = malloc((size_t)gpt->secsz)) == NULL) {
113: gpt_warn(gpt, "Can't allocate memory for sector");
114: goto fail;
1.1 jakllsch 115: }
116:
117:
1.21 christos 118: if ((bfd = open(bp, O_RDONLY)) < 0 || fstat(bfd, &st) == -1) {
119: gpt_warn(gpt, "Can't open `%s'", bp);
1.1 jakllsch 120: goto fail;
121: }
122:
1.2 jakllsch 123: if (st.st_size != MBR_DSN_OFFSET) {
1.16 christos 124: gpt_warnx(gpt, "The bootcode in `%s' does not match the"
1.21 christos 125: " expected size %u", bp, MBR_DSN_OFFSET);
1.1 jakllsch 126: goto fail;
127: }
128:
1.22 ! christos 129: if (read(bfd, buf, (size_t)st.st_size) != (ssize_t)st.st_size) {
1.21 christos 130: gpt_warn(gpt, "Error reading from `%s'", bp);
1.1 jakllsch 131: goto fail;
132: }
133:
1.21 christos 134: ret = 0;
135: fail:
1.16 christos 136: if (bfd != -1)
1.1 jakllsch 137: close(bfd);
1.21 christos 138: if (ret == -1) {
1.1 jakllsch 139: free(buf);
140: buf = NULL;
141: }
1.21 christos 142: free(bp);
1.1 jakllsch 143: return buf;
144: }
145:
1.16 christos 146: static int
147: set_bootable(gpt_t gpt, map_t map, map_t tbl, unsigned int i)
1.1 jakllsch 148: {
1.16 christos 149: unsigned int j;
150: struct gpt_hdr *hdr = map->map_data;
151: struct gpt_ent *ent;
152: unsigned int ne = le32toh(hdr->hdr_entries);
153:
154: for (j = 0; j < ne; j++) {
155: ent = gpt_ent(map, tbl, j);
156: ent->ent_attr &= ~GPT_ENT_ATTR_LEGACY_BIOS_BOOTABLE;
157: }
158:
159: ent = gpt_ent(map, tbl, i);
160: ent->ent_attr |= GPT_ENT_ATTR_LEGACY_BIOS_BOOTABLE;
161:
162: return gpt_write_crc(gpt, map, tbl);
163: }
164:
165: static int
1.21 christos 166: biosboot(gpt_t gpt, daddr_t start, uint64_t size, u_int entry, uint8_t *label,
167: const char *bootpath)
1.16 christos 168: {
169: map_t mbrmap, m;
1.1 jakllsch 170: struct mbr *mbr, *bootcode;
1.16 christos 171: unsigned int i;
1.2 jakllsch 172: struct gpt_ent *ent;
1.19 christos 173: uint8_t utfbuf[__arraycount(ent->ent_name) * 3 + 1];
1.1 jakllsch 174:
175: /*
176: * Parse and validate partition maps
177: */
1.16 christos 178: if (gpt_hdr(gpt) == NULL)
179: return -1;
1.1 jakllsch 180:
1.16 christos 181: mbrmap = map_find(gpt, MAP_TYPE_PMBR);
1.1 jakllsch 182: if (mbrmap == NULL || mbrmap->map_start != 0) {
1.16 christos 183: gpt_warnx(gpt, "No valid Protective MBR found");
184: return -1;
1.1 jakllsch 185: }
186:
187: mbr = mbrmap->map_data;
188:
189: /*
190: * Update the boot code
191: */
1.21 christos 192: if ((bootcode = read_boot(gpt, bootpath)) == NULL) {
1.16 christos 193: gpt_warnx(gpt, "Error reading bootcode");
194: return -1;
1.1 jakllsch 195: }
196: (void)memcpy(&mbr->mbr_code, &bootcode->mbr_code,
197: sizeof(mbr->mbr_code));
198: free(bootcode);
199:
200: /*
201: * Walk through the GPT and see where we can boot from
202: */
1.16 christos 203: for (m = map_first(gpt); m != NULL; m = m->map_next) {
1.1 jakllsch 204: if (m->map_type != MAP_TYPE_GPT_PART || m->map_index < 1)
205: continue;
206:
1.2 jakllsch 207: ent = m->map_data;
1.1 jakllsch 208:
209: /* first, prefer user selection */
210: if (entry > 0 && m->map_index == entry)
211: break;
212:
1.19 christos 213: if (label != NULL) {
214: utf16_to_utf8(ent->ent_name, utfbuf, sizeof(utfbuf));
215: if (strcmp((char *)label, (char *)utfbuf) == 0)
1.9 jnemeth 216: break;
1.19 christos 217: }
1.9 jnemeth 218:
1.1 jakllsch 219: /* next, partition as could be specified by wedge */
1.9 jnemeth 220: if (entry < 1 && label == NULL && size > 0 &&
1.1 jakllsch 221: m->map_start == start && m->map_size == (off_t)size)
222: break;
223: }
224:
225: if (m == NULL) {
1.16 christos 226: gpt_warnx(gpt, "No bootable partition");
227: return -1;
1.2 jakllsch 228: }
229:
230: i = m->map_index - 1;
1.1 jakllsch 231:
232:
1.16 christos 233: if (set_bootable(gpt, gpt->gpt, gpt->tbl, i) == -1)
234: return -1;
1.2 jakllsch 235:
1.16 christos 236: if (set_bootable(gpt, gpt->tpg, gpt->lbt, i) == -1)
237: return -1;
1.2 jakllsch 238:
1.16 christos 239: if (gpt_write(gpt, mbrmap) == -1) {
240: gpt_warnx(gpt, "Cannot update Protective MBR");
241: return -1;
1.1 jakllsch 242: }
1.9 jnemeth 243:
1.16 christos 244: gpt_msg(gpt, "Partition %d marked as bootable", i + 1);
245: return 0;
1.1 jakllsch 246: }
247:
1.17 christos 248: static int
1.16 christos 249: cmd_biosboot(gpt_t gpt, int argc, char *argv[])
1.1 jakllsch 250: {
1.12 christos 251: #ifdef DIOCGWEDGEINFO
1.1 jakllsch 252: struct dkwedge_info dkw;
1.12 christos 253: #endif
1.16 christos 254: int ch;
255: gpt_t ngpt = gpt;
1.21 christos 256: daddr_t start = 0;
257: uint64_t size = 0;
258: unsigned int entry = 0;
259: uint8_t *label = NULL;
260: const char *bootpath = NULL;
1.1 jakllsch 261:
1.9 jnemeth 262: while ((ch = getopt(argc, argv, "c:i:L:")) != -1) {
1.1 jakllsch 263: switch(ch) {
264: case 'c':
1.18 christos 265: if (gpt_name_get(gpt, &bootpath) == -1)
266: return usage();
1.1 jakllsch 267: break;
268: case 'i':
1.22 ! christos 269: if (gpt_uint_get(&entry) == -1)
1.17 christos 270: return usage();
1.1 jakllsch 271: break;
1.9 jnemeth 272: case 'L':
1.18 christos 273: if (gpt_name_get(gpt, &label) == -1)
1.17 christos 274: return usage();
1.9 jnemeth 275: break;
1.1 jakllsch 276: default:
1.17 christos 277: return usage();
1.1 jakllsch 278: }
279: }
280:
1.16 christos 281: if (argc != optind)
1.17 christos 282: return usage();
1.1 jakllsch 283:
284: #ifdef DIOCGWEDGEINFO
1.16 christos 285: if ((gpt->sb.st_mode & S_IFMT) != S_IFREG &&
286: ioctl(gpt->fd, DIOCGWEDGEINFO, &dkw) != -1) {
287: if (entry > 0)
288: /* wedges and indexes are mutually exclusive */
1.17 christos 289: return usage();
1.16 christos 290: start = dkw.dkw_offset;
291: size = dkw.dkw_size;
1.21 christos 292: ngpt = gpt_open(dkw.dkw_parent, gpt->flags, gpt->verbose,
1.16 christos 293: gpt->mediasz, gpt->secsz);
294: if (ngpt == NULL)
295: return -1;
296: }
1.1 jakllsch 297: #endif
1.21 christos 298: biosboot(ngpt, start, size, entry, label, bootpath);
1.16 christos 299: if (ngpt != gpt)
300: gpt_close(ngpt);
1.1 jakllsch 301:
1.16 christos 302: return 0;
1.1 jakllsch 303: }
CVSweb <webmaster@jp.NetBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to biosboot.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [cvs.NetBSD.org] / src / sbin / gpt