1 /* $NetBSD: mbrlabel.c,v 1.21 2002/09/28 00:56:26 dbj Exp $ */ 2 3 /* 4 * Copyright (C) 1998 Wolfgang Solfrank. 5 * Copyright (C) 1998 TooLs GmbH. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by TooLs GmbH. 19 * 4. The name of TooLs GmbH may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 #ifndef lint 36 __RCSID("$NetBSD: mbrlabel.c,v 1.21 2002/09/28 00:56:26 dbj Exp $"); 37 #endif /* not lint */ 38 39 #include <stdio.h> 40 #include <fcntl.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <unistd.h> 44 #include <util.h> 45 46 #include <sys/param.h> 47 #define FSTYPENAMES 48 #include <sys/disklabel.h> 49 #include <sys/disklabel_mbr.h> 50 #include <sys/ioctl.h> 51 52 #include "dkcksum.h" 53 #include "extern.h" 54 55 int main(int, char **); 56 void usage(void); 57 void getlabel(int); 58 void setlabel(int, int); 59 int getparts(int, u_int32_t, u_int32_t, int); 60 int nbsdtype(int); 61 u_int16_t getshort(void *); 62 u_int32_t getlong(void *); 63 64 struct disklabel label; 65 66 void 67 getlabel(int sd) 68 { 69 70 if (ioctl(sd, DIOCGDINFO, &label) < 0) { 71 perror("get label"); 72 exit(1); 73 } 74 /* 75 * Some ports seem to not set the number of partitions 76 * correctly, albeit they seem to set the raw partition ok! 77 */ 78 if (label.d_npartitions <= getrawpartition()) 79 label.d_npartitions = getrawpartition() + 1; 80 } 81 82 void 83 setlabel(int sd, int doraw) 84 { 85 86 label.d_checksum = 0; 87 label.d_checksum = dkcksum(&label); 88 if (ioctl(sd, doraw ? DIOCWDINFO : DIOCSDINFO, &label) < 0) { 89 perror("set label"); 90 exit(1); 91 } 92 } 93 94 static struct typetab { 95 int mbrtype; 96 int nbsdtype; 97 } typetable[] = { 98 { MBR_PTYPE_386BSD, FS_BSDFFS }, 99 { MBR_PTYPE_FAT12, FS_MSDOS }, 100 { MBR_PTYPE_FAT16B, FS_MSDOS }, 101 { MBR_PTYPE_FAT16L, FS_MSDOS }, 102 { MBR_PTYPE_FAT16S, FS_MSDOS }, 103 { MBR_PTYPE_FAT32, FS_MSDOS }, 104 { MBR_PTYPE_FAT32L, FS_MSDOS }, 105 { MBR_PTYPE_LNXEXT2, FS_EX2FS }, 106 { MBR_PTYPE_LNXSWAP, FS_SWAP }, 107 { MBR_PTYPE_NETBSD, FS_BSDFFS }, 108 { MBR_PTYPE_NTFS, FS_NTFS }, 109 { MBR_PTYPE_APPLEUFS, FS_APPLEUFS }, 110 { 0, 0 } 111 }; 112 113 int 114 nbsdtype(int type) 115 { 116 struct typetab *tt; 117 118 for (tt = typetable; tt->mbrtype; tt++) 119 if (tt->mbrtype == type) 120 return (tt->nbsdtype); 121 return (FS_OTHER); 122 } 123 124 u_int16_t 125 getshort(void *p) 126 { 127 unsigned char *cp = p; 128 129 return (cp[0] | (cp[1] << 8)); 130 } 131 132 u_int32_t 133 getlong(void *p) 134 { 135 unsigned char *cp = p; 136 137 return (cp[0] | (cp[1] << 8) | (cp[2] << 16) | (cp[3] << 24)); 138 } 139 140 int 141 getparts(int sd, u_int32_t off, u_int32_t extoff, int verbose) 142 { 143 unsigned char buf[DEV_BSIZE]; 144 struct mbr_partition parts[NMBRPART]; 145 struct partition npe; 146 off_t loff; 147 int i, j, unused, changed; 148 149 changed = 0; 150 loff = (off_t)off * DEV_BSIZE; 151 152 if (lseek(sd, loff, SEEK_SET) != loff) { 153 perror("seek label"); 154 exit(1); 155 } 156 if (read(sd, buf, sizeof buf) != DEV_BSIZE) { 157 perror("read label"); 158 exit(1); 159 } 160 if (getshort(buf + MBR_MAGICOFF) != MBR_MAGIC) 161 return (changed); 162 memcpy(parts, buf + MBR_PARTOFF, sizeof parts); 163 164 /* scan partition table */ 165 for (i = 0; i < NMBRPART; i++) { 166 if (parts[i].mbrp_typ == 0 || 167 /* extended partitions are handled below */ 168 MBR_IS_EXTENDED(parts[i].mbrp_typ)) 169 continue; 170 171 memset((void *)&npe, 0, sizeof(npe)); 172 npe.p_size = getlong(&parts[i].mbrp_size); 173 npe.p_offset = getlong(&parts[i].mbrp_start) + off; 174 npe.p_fstype = nbsdtype(parts[i].mbrp_typ); 175 176 /* find existing entry, or first free slot */ 177 unused = -1; /* flag as no free slot */ 178 if (verbose) 179 printf( 180 "Found %s partition; size %u (%u MB), offset %u\n", 181 fstypenames[npe.p_fstype], 182 npe.p_size, npe.p_size / 2048, npe.p_offset); 183 for (j = 0; j < label.d_npartitions; j++) { 184 struct partition *lpe; 185 186 if (j == RAW_PART) 187 continue; 188 lpe = &label.d_partitions[j]; 189 if (lpe->p_size == npe.p_size && 190 lpe->p_offset == npe.p_offset 191 #ifdef notyet 192 && (lpe->p_fstype == npe.p_fstype || 193 lpe->p_fstype == FS_UNUSED) */ 194 #endif 195 ) { 196 if (verbose) 197 printf( 198 " skipping existing %s partition at slot %c.\n", 199 fstypenames[lpe->p_fstype], 200 j + 'a'); 201 unused = -2; /* flag as existing */ 202 break; 203 } 204 if (unused == -1 && lpe->p_size == 0 && 205 lpe->p_fstype == FS_UNUSED) 206 unused = j; 207 } 208 if (unused == -2) 209 continue; /* entry exists, skip... */ 210 if (unused == -1) { 211 if (label.d_npartitions < MAXPARTITIONS) { 212 unused = label.d_npartitions; 213 label.d_npartitions++; 214 } else { 215 printf( 216 " WARNING: no slots free for %s partition.\n", 217 fstypenames[npe.p_fstype]); 218 continue; 219 } 220 } 221 222 if (verbose) 223 printf(" adding %s partition to slot %c.\n", 224 fstypenames[npe.p_fstype], unused + 'a'); 225 switch (npe.p_fstype) { 226 case FS_BSDFFS: 227 case FS_APPLEUFS: 228 npe.p_size = 16384; /* XXX */ 229 npe.p_fsize = 1024; 230 npe.p_frag = 8; 231 npe.p_cpg = 16; 232 break; 233 #ifdef __does_not_happen__ 234 case FS_BSDLFS: 235 npe.p_size = 16384; /* XXX */ 236 npe.p_fsize = 1024; 237 npe.p_frag = 8; 238 npe.p_sgs = XXX; 239 break; 240 #endif 241 } 242 changed++; 243 label.d_partitions[unused] = npe; 244 } 245 246 /* recursively scan extended partitions */ 247 for (i = 0; i < NMBRPART; i++) { 248 u_int32_t poff; 249 250 if (MBR_IS_EXTENDED(parts[i].mbrp_typ)) { 251 poff = getlong(&parts[i].mbrp_start) + extoff; 252 changed += getparts(sd, poff, 253 extoff ? extoff : poff, verbose); 254 } 255 } 256 return (changed); 257 } 258 259 void 260 usage(void) 261 { 262 fprintf(stderr, "Usage: %s [-fqrw] rawdisk\n", getprogname()); 263 exit(1); 264 } 265 266 267 int 268 main(int argc, char **argv) 269 { 270 int sd, ch, changed; 271 char name[MAXPATHLEN]; 272 int force; /* force label update */ 273 int raw; /* update on-disk label as well */ 274 int verbose; /* verbose output */ 275 int write_it; /* update in-core label if changed */ 276 277 force = 0; 278 raw = 0; 279 verbose = 1; 280 write_it = 0; 281 while ((ch = getopt(argc, argv, "fqrw")) != -1) { 282 switch (ch) { 283 case 'f': 284 force = 1; 285 break; 286 case 'q': 287 verbose = 0; 288 break; 289 case 'r': 290 raw = 1; 291 break; 292 case 'w': 293 write_it = 1; 294 break; 295 default: 296 usage(); 297 } 298 } 299 argc -= optind; 300 argv += optind; 301 if (argc != 1) 302 usage(); 303 304 if ((sd = opendisk(argv[0], write_it ? O_RDWR : O_RDONLY, name, 305 (size_t)MAXPATHLEN, 0)) < 0) { 306 perror(argv[0]); 307 exit(1); 308 } 309 getlabel(sd); 310 changed = getparts(sd, MBR_BBSECTOR, 0, verbose); 311 312 if (verbose) { 313 putchar('\n'); 314 showpartitions(stdout, &label, 0); 315 putchar('\n'); 316 } 317 if (write_it) { 318 if (! changed && ! force) 319 printf("No change; not updating disk label.\n"); 320 else { 321 if (verbose) 322 printf("Updating in-core %sdisk label.\n", 323 raw ? "and on-disk " : ""); 324 setlabel(sd, raw); 325 } 326 } else { 327 printf("Not updating disk label.\n"); 328 } 329 close(sd); 330 return (0); 331 } 332