1 /*- 2 * Copyright (c) 2007 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 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/bio.h> 32 #include <sys/disklabel.h> 33 #include <sys/endian.h> 34 #include <sys/kernel.h> 35 #include <sys/kobj.h> 36 #include <sys/limits.h> 37 #include <sys/lock.h> 38 #include <sys/malloc.h> 39 #include <sys/mutex.h> 40 #include <sys/queue.h> 41 #include <sys/sbuf.h> 42 #include <sys/systm.h> 43 #include <geom/geom.h> 44 #include <geom/part/g_part.h> 45 46 #include "g_part_if.h" 47 48 struct g_part_bsd_table { 49 struct g_part_table base; 50 u_char *label; 51 uint32_t offset; 52 }; 53 54 struct g_part_bsd_entry { 55 struct g_part_entry base; 56 struct partition part; 57 }; 58 59 static int g_part_bsd_add(struct g_part_table *, struct g_part_entry *, 60 struct g_part_parms *); 61 static int g_part_bsd_create(struct g_part_table *, struct g_part_parms *); 62 static int g_part_bsd_destroy(struct g_part_table *, struct g_part_parms *); 63 static int g_part_bsd_dumpto(struct g_part_table *, struct g_part_entry *); 64 static int g_part_bsd_modify(struct g_part_table *, struct g_part_entry *, 65 struct g_part_parms *); 66 static char *g_part_bsd_name(struct g_part_table *, struct g_part_entry *, 67 char *, size_t); 68 static int g_part_bsd_probe(struct g_part_table *, struct g_consumer *); 69 static int g_part_bsd_read(struct g_part_table *, struct g_consumer *); 70 static const char *g_part_bsd_type(struct g_part_table *, struct g_part_entry *, 71 char *, size_t); 72 static int g_part_bsd_write(struct g_part_table *, struct g_consumer *); 73 74 static kobj_method_t g_part_bsd_methods[] = { 75 KOBJMETHOD(g_part_add, g_part_bsd_add), 76 KOBJMETHOD(g_part_create, g_part_bsd_create), 77 KOBJMETHOD(g_part_destroy, g_part_bsd_destroy), 78 KOBJMETHOD(g_part_dumpto, g_part_bsd_dumpto), 79 KOBJMETHOD(g_part_modify, g_part_bsd_modify), 80 KOBJMETHOD(g_part_name, g_part_bsd_name), 81 KOBJMETHOD(g_part_probe, g_part_bsd_probe), 82 KOBJMETHOD(g_part_read, g_part_bsd_read), 83 KOBJMETHOD(g_part_type, g_part_bsd_type), 84 KOBJMETHOD(g_part_write, g_part_bsd_write), 85 { 0, 0 } 86 }; 87 88 static struct g_part_scheme g_part_bsd_scheme = { 89 "BSD", 90 g_part_bsd_methods, 91 sizeof(struct g_part_bsd_table), 92 .gps_entrysz = sizeof(struct g_part_bsd_entry), 93 .gps_minent = 8, 94 .gps_maxent = 20, 95 }; 96 G_PART_SCHEME_DECLARE(g_part_bsd_scheme); 97 98 static int 99 bsd_parse_type(const char *type, uint8_t *fstype) 100 { 101 const char *alias; 102 char *endp; 103 long lt; 104 105 if (type[0] == '!') { 106 lt = strtol(type + 1, &endp, 0); 107 if (type[1] == '\0' || *endp != '\0' || lt <= 0 || lt >= 256) 108 return (EINVAL); 109 *fstype = (u_int)lt; 110 return (0); 111 } 112 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP); 113 if (!strcasecmp(type, alias)) { 114 *fstype = FS_SWAP; 115 return (0); 116 } 117 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS); 118 if (!strcasecmp(type, alias)) { 119 *fstype = FS_BSDFFS; 120 return (0); 121 } 122 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM); 123 if (!strcasecmp(type, alias)) { 124 *fstype = FS_VINUM; 125 return (0); 126 } 127 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS); 128 if (!strcasecmp(type, alias)) { 129 *fstype = FS_ZFS; 130 return (0); 131 } 132 return (EINVAL); 133 } 134 135 static int 136 g_part_bsd_add(struct g_part_table *basetable, struct g_part_entry *baseentry, 137 struct g_part_parms *gpp) 138 { 139 struct g_part_bsd_entry *entry; 140 struct g_part_bsd_table *table; 141 142 if (gpp->gpp_parms & G_PART_PARM_LABEL) 143 return (EINVAL); 144 145 entry = (struct g_part_bsd_entry *)baseentry; 146 table = (struct g_part_bsd_table *)basetable; 147 148 entry->part.p_size = gpp->gpp_size; 149 entry->part.p_offset = gpp->gpp_start + table->offset; 150 entry->part.p_fsize = 0; 151 entry->part.p_frag = 0; 152 entry->part.p_cpg = 0; 153 return (bsd_parse_type(gpp->gpp_type, &entry->part.p_fstype)); 154 } 155 156 static int 157 g_part_bsd_create(struct g_part_table *basetable, struct g_part_parms *gpp) 158 { 159 struct g_consumer *cp; 160 struct g_provider *pp; 161 struct g_part_entry *baseentry; 162 struct g_part_bsd_entry *entry; 163 struct g_part_bsd_table *table; 164 u_char *ptr; 165 uint64_t msize; 166 uint32_t ncyls, secpercyl; 167 168 pp = gpp->gpp_provider; 169 cp = LIST_FIRST(&pp->consumers); 170 171 if (pp->sectorsize < sizeof(struct disklabel)) 172 return (ENOSPC); 173 174 msize = pp->mediasize / pp->sectorsize; 175 secpercyl = basetable->gpt_sectors * basetable->gpt_heads; 176 ncyls = msize / secpercyl; 177 178 table = (struct g_part_bsd_table *)basetable; 179 ptr = table->label = g_malloc(pp->sectorsize, M_WAITOK | M_ZERO); 180 181 le32enc(ptr + 0, DISKMAGIC); /* d_magic */ 182 le32enc(ptr + 40, pp->sectorsize); /* d_secsize */ 183 le32enc(ptr + 44, basetable->gpt_sectors); /* d_nsectors */ 184 le32enc(ptr + 48, basetable->gpt_heads); /* d_ntracks */ 185 le32enc(ptr + 52, ncyls); /* d_ncylinders */ 186 le32enc(ptr + 56, secpercyl); /* d_secpercyl */ 187 le32enc(ptr + 60, msize); /* d_secperunit */ 188 le16enc(ptr + 72, 3600); /* d_rpm */ 189 le32enc(ptr + 132, DISKMAGIC); /* d_magic2 */ 190 le16enc(ptr + 138, basetable->gpt_entries); /* d_npartitions */ 191 le32enc(ptr + 140, BBSIZE); /* d_bbsize */ 192 193 basetable->gpt_first = 0; 194 basetable->gpt_last = msize - 1; 195 basetable->gpt_isleaf = 1; 196 197 baseentry = g_part_new_entry(basetable, RAW_PART + 1, 198 basetable->gpt_first, basetable->gpt_last); 199 baseentry->gpe_internal = 1; 200 entry = (struct g_part_bsd_entry *)baseentry; 201 entry->part.p_size = basetable->gpt_last + 1; 202 entry->part.p_offset = table->offset; 203 204 return (0); 205 } 206 207 static int 208 g_part_bsd_destroy(struct g_part_table *basetable, struct g_part_parms *gpp) 209 { 210 211 /* Wipe the second sector to clear the partitioning. */ 212 basetable->gpt_smhead |= 2; 213 return (0); 214 } 215 216 static int 217 g_part_bsd_dumpto(struct g_part_table *table, struct g_part_entry *baseentry) 218 { 219 struct g_part_bsd_entry *entry; 220 221 /* Allow dumping to a swap partition only. */ 222 entry = (struct g_part_bsd_entry *)baseentry; 223 return ((entry->part.p_fstype == FS_SWAP) ? 1 : 0); 224 } 225 226 static int 227 g_part_bsd_modify(struct g_part_table *basetable, 228 struct g_part_entry *baseentry, struct g_part_parms *gpp) 229 { 230 struct g_part_bsd_entry *entry; 231 232 if (gpp->gpp_parms & G_PART_PARM_LABEL) 233 return (EINVAL); 234 235 entry = (struct g_part_bsd_entry *)baseentry; 236 if (gpp->gpp_parms & G_PART_PARM_TYPE) 237 return (bsd_parse_type(gpp->gpp_type, &entry->part.p_fstype)); 238 return (0); 239 } 240 241 static char * 242 g_part_bsd_name(struct g_part_table *table, struct g_part_entry *baseentry, 243 char *buf, size_t bufsz) 244 { 245 246 snprintf(buf, bufsz, "%c", 'a' + baseentry->gpe_index - 1); 247 return (buf); 248 } 249 250 static int 251 g_part_bsd_probe(struct g_part_table *table, struct g_consumer *cp) 252 { 253 struct g_provider *pp; 254 u_char *buf; 255 uint32_t magic1, magic2; 256 int error; 257 258 pp = cp->provider; 259 260 /* Sanity-check the provider. */ 261 if (pp->sectorsize < sizeof(struct disklabel) || 262 pp->mediasize < BBSIZE) 263 return (ENOSPC); 264 265 /* Check that there's a disklabel. */ 266 buf = g_read_data(cp, pp->sectorsize, pp->sectorsize, &error); 267 if (buf == NULL) 268 return (error); 269 magic1 = le32dec(buf + 0); 270 magic2 = le32dec(buf + 132); 271 g_free(buf); 272 return ((magic1 == DISKMAGIC && magic2 == DISKMAGIC) 273 ? G_PART_PROBE_PRI_NORM : ENXIO); 274 } 275 276 static int 277 g_part_bsd_read(struct g_part_table *basetable, struct g_consumer *cp) 278 { 279 struct g_provider *pp; 280 struct g_part_bsd_table *table; 281 struct g_part_entry *baseentry; 282 struct g_part_bsd_entry *entry; 283 struct partition part; 284 u_char *buf, *p; 285 off_t chs, msize; 286 u_int sectors, heads; 287 int error, index; 288 289 pp = cp->provider; 290 table = (struct g_part_bsd_table *)basetable; 291 msize = pp->mediasize / pp->sectorsize; 292 293 buf = g_read_data(cp, pp->sectorsize, pp->sectorsize, &error); 294 if (buf == NULL) 295 return (error); 296 297 table->label = buf; 298 299 if (le32dec(buf + 40) != pp->sectorsize) 300 goto invalid_label; 301 sectors = le32dec(buf + 44); 302 if (sectors < 1 || sectors > 63) 303 goto invalid_label; 304 if (sectors != basetable->gpt_sectors && !basetable->gpt_fixgeom) { 305 g_part_geometry_heads(msize, sectors, &chs, &heads); 306 if (chs != 0) { 307 basetable->gpt_sectors = sectors; 308 basetable->gpt_heads = heads; 309 } 310 } 311 heads = le32dec(buf + 48); 312 if (heads < 1 || heads > 255) 313 goto invalid_label; 314 if (heads != basetable->gpt_heads && !basetable->gpt_fixgeom) 315 basetable->gpt_heads = heads; 316 if (sectors != basetable->gpt_sectors || 317 heads != basetable->gpt_heads) 318 printf("GEOM: %s: geometry does not match label.\n", pp->name); 319 320 chs = le32dec(buf + 60); 321 if (chs < 1 || chs > msize) 322 goto invalid_label; 323 if (chs != msize) 324 printf("GEOM: %s: media size does not match label.\n", 325 pp->name); 326 327 basetable->gpt_first = 0; 328 basetable->gpt_last = msize - 1; 329 basetable->gpt_isleaf = 1; 330 331 basetable->gpt_entries = le16dec(buf + 138); 332 if (basetable->gpt_entries < g_part_bsd_scheme.gps_minent || 333 basetable->gpt_entries > g_part_bsd_scheme.gps_maxent) 334 goto invalid_label; 335 336 table->offset = le32dec(buf + 148 + RAW_PART * 16 + 4); 337 for (index = basetable->gpt_entries - 1; index >= 0; index--) { 338 p = buf + 148 + index * 16; 339 part.p_size = le32dec(p + 0); 340 part.p_offset = le32dec(p + 4); 341 part.p_fsize = le32dec(p + 8); 342 part.p_fstype = p[12]; 343 part.p_frag = p[13]; 344 part.p_cpg = le16dec(p + 14); 345 if (part.p_size == 0) 346 continue; 347 if (part.p_fstype == FS_UNUSED && index != RAW_PART) 348 continue; 349 if (part.p_offset < table->offset) 350 continue; 351 baseentry = g_part_new_entry(basetable, index + 1, 352 part.p_offset - table->offset, 353 part.p_offset - table->offset + part.p_size - 1); 354 entry = (struct g_part_bsd_entry *)baseentry; 355 entry->part = part; 356 if (part.p_fstype == FS_UNUSED) 357 baseentry->gpe_internal = 1; 358 } 359 360 return (0); 361 362 invalid_label: 363 printf("GEOM: %s: invalid disklabel.\n", pp->name); 364 g_free(table->label); 365 return (EINVAL); 366 } 367 368 static const char * 369 g_part_bsd_type(struct g_part_table *basetable, struct g_part_entry *baseentry, 370 char *buf, size_t bufsz) 371 { 372 struct g_part_bsd_entry *entry; 373 int type; 374 375 entry = (struct g_part_bsd_entry *)baseentry; 376 type = entry->part.p_fstype; 377 if (type == FS_SWAP) 378 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP)); 379 if (type == FS_BSDFFS) 380 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS)); 381 if (type == FS_VINUM) 382 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM)); 383 if (type == FS_ZFS) 384 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS)); 385 snprintf(buf, bufsz, "!%d", type); 386 return (buf); 387 } 388 389 static int 390 g_part_bsd_write(struct g_part_table *basetable, struct g_consumer *cp) 391 { 392 struct g_provider *pp; 393 struct g_part_entry *baseentry; 394 struct g_part_bsd_entry *entry; 395 struct g_part_bsd_table *table; 396 uint16_t sum; 397 u_char *p, *pe; 398 int error, index; 399 400 pp = cp->provider; 401 table = (struct g_part_bsd_table *)basetable; 402 baseentry = LIST_FIRST(&basetable->gpt_entry); 403 for (index = 1; index <= basetable->gpt_entries; index++) { 404 p = table->label + 148 + (index - 1) * 16; 405 entry = (baseentry != NULL && index == baseentry->gpe_index) 406 ? (struct g_part_bsd_entry *)baseentry : NULL; 407 if (entry != NULL && !baseentry->gpe_deleted) { 408 le32enc(p + 0, entry->part.p_size); 409 le32enc(p + 4, entry->part.p_offset); 410 le32enc(p + 8, entry->part.p_fsize); 411 p[12] = entry->part.p_fstype; 412 p[13] = entry->part.p_frag; 413 le16enc(p + 14, entry->part.p_cpg); 414 } else 415 bzero(p, 16); 416 417 if (entry != NULL) 418 baseentry = LIST_NEXT(baseentry, gpe_entry); 419 } 420 421 /* Calculate checksum. */ 422 le16enc(table->label + 136, 0); 423 pe = table->label + 148 + basetable->gpt_entries * 16; 424 sum = 0; 425 for (p = table->label; p < pe; p += 2) 426 sum ^= le16dec(p); 427 le16enc(table->label + 136, sum); 428 429 error = g_write_data(cp, pp->sectorsize, table->label, pp->sectorsize); 430 return (error); 431 } 432