bbinfo.c revision 1.11
1 /* $NetBSD: bbinfo.c,v 1.11 2005/06/07 13:49:31 he Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Matt Fredette, Paul Kranenburg, and Luke Mewburn. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #if HAVE_NBTOOL_CONFIG_H 40 #include "nbtool_config.h" 41 #endif 42 43 #include <sys/cdefs.h> 44 #if !defined(__lint) 45 __RCSID("$NetBSD: bbinfo.c,v 1.11 2005/06/07 13:49:31 he Exp $"); 46 #endif /* !__lint */ 47 48 #include <sys/param.h> 49 50 #include <assert.h> 51 #include <err.h> 52 #include <stddef.h> 53 #include <stdio.h> 54 #include <stdlib.h> 55 #include <string.h> 56 #include <unistd.h> 57 58 #include "installboot.h" 59 60 int 61 shared_bbinfo_clearboot(ib_params *params, struct bbinfo_params *bbparams, 62 int (*callback)(ib_params *, struct bbinfo_params *, uint8_t *)) 63 { 64 uint8_t *bb; 65 ssize_t rv; 66 int retval; 67 68 assert(params != NULL); 69 assert(params->fsfd != -1); 70 assert(params->filesystem != NULL); 71 assert(bbparams != NULL); 72 assert((strlen(bbparams->magic) + 1) == 32); 73 74 retval = 0; 75 if ((bb = malloc(bbparams->maxsize)) == NULL) { 76 warn("Allocating %lu bytes for bbinfo", 77 (unsigned long) bbparams->maxsize); 78 goto done; 79 } 80 81 /* First check that it _could_ exist here */ 82 rv = pread(params->fsfd, bb, bbparams->maxsize, bbparams->offset); 83 if (rv == -1) { 84 warn("Reading `%s'", params->filesystem); 85 goto done; 86 } else if (rv != bbparams->maxsize) { 87 warnx("Reading `%s': short read", params->filesystem); 88 goto done; 89 } 90 91 /* Now clear out (past the header offset) */ 92 memset(bb + bbparams->headeroffset, 0, 93 bbparams->maxsize - bbparams->headeroffset); 94 if (callback != NULL && ! (*callback)(params, bbparams, bb)) 95 goto done; 96 97 if (params->flags & IB_VERBOSE) 98 printf("%slearing boot block\n", 99 (params->flags & IB_NOWRITE) ? "Not c" : "C"); 100 if (params->flags & IB_NOWRITE) { 101 retval = 1; 102 goto done; 103 } 104 105 rv = pwrite(params->fsfd, bb, bbparams->maxsize, bbparams->offset); 106 if (rv == -1) { 107 warn("Writing `%s'", params->filesystem); 108 goto done; 109 } else if (rv != bbparams->maxsize) { 110 warnx("Writing `%s': short write", params->filesystem); 111 goto done; 112 } else 113 retval = 1; 114 115 done: 116 if (bb != NULL) 117 free(bb); 118 return (retval); 119 } 120 121 int 122 shared_bbinfo_setboot(ib_params *params, struct bbinfo_params *bbparams, 123 int (*callback)(ib_params *, struct bbinfo_params *, uint8_t *)) 124 { 125 uint8_t *bb; 126 int retval; 127 ssize_t rv; 128 size_t bbi; 129 struct shared_bbinfo *bbinfop; /* bbinfo in prototype image */ 130 uint32_t maxblk, nblk, blk_i; 131 ib_block *blocks; 132 133 assert(params != NULL); 134 assert(params->fsfd != -1); 135 assert(params->filesystem != NULL); 136 assert(params->fstype != NULL); 137 assert(params->s1fd != -1); 138 assert(params->stage1 != NULL); 139 assert(bbparams != NULL); 140 assert((strlen(bbparams->magic) + 1) == 32); 141 142 bbinfop = NULL; /* XXXGCC -Wuninitialized [sparc64] */ 143 retval = 0; 144 blocks = NULL; 145 if ((bb = malloc(bbparams->maxsize)) == NULL) { 146 warn("Allocating %lu bytes for bbinfo", 147 (unsigned long) bbparams->maxsize); 148 goto done; 149 } 150 151 if (params->stage2 == NULL) { 152 warnx("Name of secondary bootstrap not provided"); 153 goto done; 154 } 155 156 if (params->s1stat.st_size > 157 bbparams->maxsize - bbparams->headeroffset) { 158 warnx("`%s' cannot be larger than %lu bytes", 159 params->stage1, (unsigned long)(bbparams->maxsize - 160 bbparams->headeroffset)); 161 goto done; 162 } 163 164 memset(bb, 0, bbparams->maxsize); 165 rv = read(params->s1fd, bb + bbparams->headeroffset, 166 bbparams->maxsize - bbparams->headeroffset); 167 if (rv == -1) { 168 warn("Reading `%s'", params->stage1); 169 goto done; 170 } 171 172 /* 173 * Quick sanity check that the bootstrap given 174 * is *not* an ELF executable. 175 */ 176 if (memcmp(bb + bbparams->headeroffset + 1, "ELF", strlen("ELF")) 177 == 0) { 178 warnx("`%s' is an ELF executable; need raw binary", 179 params->stage1); 180 goto done; 181 } 182 183 #define HOSTTOTARGET32(x) ((bbparams->endian == BBINFO_LITTLE_ENDIAN) \ 184 ? htole32((x)) : htobe32((x))) 185 #define TARGET32TOHOST(x) ((bbparams->endian == BBINFO_LITTLE_ENDIAN) \ 186 ? le32toh((x)) : be32toh((x))) 187 188 /* Look for the bbinfo structure. */ 189 bbinfop = NULL; 190 for (bbi = 0; bbi < bbparams->maxsize; bbi += sizeof(uint32_t)) { 191 bbinfop = (void *) (bb + bbparams->headeroffset + bbi); 192 if (memcmp(bbinfop->bbi_magic, bbparams->magic, 193 sizeof(bbinfop->bbi_magic)) == 0) 194 break; 195 } 196 if (bbi >= bbparams->maxsize) { 197 warnx("%s bbinfo structure not found in `%s'", 198 params->machine->name, params->stage1); 199 goto done; 200 } 201 maxblk = TARGET32TOHOST(bbinfop->bbi_block_count); 202 if (maxblk == 0 || maxblk > (bbparams->maxsize / sizeof(uint32_t))) { 203 warnx("%s bbinfo structure in `%s' has preposterous size `%u'", 204 params->machine->name, params->stage1, maxblk); 205 goto done; 206 } 207 208 /* Allocate space for our block list. */ 209 blocks = malloc(sizeof(*blocks) * maxblk); 210 if (blocks == NULL) { 211 warn("Allocating %lu bytes", 212 (unsigned long)sizeof(*blocks) * maxblk); 213 goto done; 214 } 215 216 if (S_ISREG(params->fsstat.st_mode)) { 217 if (fsync(params->fsfd) == -1) 218 warn("Synchronising file system `%s'", 219 params->filesystem); 220 } else { 221 /* Ensure the secondary bootstrap is on disk. */ 222 sync(); 223 } 224 225 /* Collect the blocks for the secondary bootstrap. */ 226 nblk = maxblk; 227 if (! params->fstype->findstage2(params, &nblk, blocks)) 228 goto done; 229 if (nblk == 0) { 230 warnx("Secondary bootstrap `%s' is empty", 231 params->stage2); 232 goto done; 233 } 234 235 /* Save those blocks in the primary bootstrap. */ 236 bbinfop->bbi_block_count = HOSTTOTARGET32(nblk); 237 bbinfop->bbi_block_size = HOSTTOTARGET32(blocks[0].blocksize); 238 for (blk_i = 0; blk_i < nblk; blk_i++) { 239 bbinfop->bbi_block_table[blk_i] = 240 HOSTTOTARGET32(blocks[blk_i].block); 241 if (blocks[blk_i].blocksize < blocks[0].blocksize && 242 blk_i + 1 != nblk) { 243 warnx("Secondary bootstrap `%s' blocks do not have " 244 "a uniform size", params->stage2); 245 goto done; 246 } 247 } 248 if (callback != NULL && ! (*callback)(params, bbparams, bb)) 249 goto done; 250 251 if (params->flags & IB_VERBOSE) { 252 printf("Bootstrap start sector: %u\n", 253 bbparams->offset / bbparams->blocksize); 254 printf("Bootstrap byte count: %u\n", (unsigned)rv); 255 printf("Bootstrap block table: " 256 "%u entries of %u bytes available, %u used:", 257 maxblk, blocks[0].blocksize, nblk); 258 for (blk_i = 0; blk_i < nblk; blk_i++) 259 printf(" %llu", 260 (unsigned long long)blocks[blk_i].block); 261 printf("\n%sriting bootstrap\n", 262 (params->flags & IB_NOWRITE) ? "Not w" : "W"); 263 } 264 if (params->flags & IB_NOWRITE) { 265 retval = 1; 266 goto done; 267 } 268 269 rv = pwrite(params->fsfd, bb, bbparams->maxsize, bbparams->offset); 270 if (rv == -1) { 271 warn("Writing `%s'", params->filesystem); 272 goto done; 273 } else if (rv != bbparams->maxsize) { 274 warnx("Writing `%s': short write", params->filesystem); 275 goto done; 276 } else { 277 retval = 1; 278 } 279 280 done: 281 if (blocks != NULL) 282 free(blocks); 283 if (bb != NULL) 284 free(bb); 285 return (retval); 286 } 287
Indexes created Thu Oct 02 14:10:14 GMT 2025