1 /* 2 * Copyright (c) 2003-2007 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Matthew Dillon <dillon@backplane.com> 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 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 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 3. Neither the name of The DragonFly Project nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific, prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * ---------------------------------------------------------------------------- 35 * "THE BEER-WARE LICENSE" (Revision 42): 36 * <phk@FreeBSD.ORG> wrote this file. As long as you retain this notice you 37 * can do whatever you want with this stuff. If we meet some day, and you think 38 * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp 39 * ---------------------------------------------------------------------------- 40 * 41 * Copyright (c) 1982, 1986, 1988, 1993 42 * The Regents of the University of California. All rights reserved. 43 * (c) UNIX System Laboratories, Inc. 44 * All or some portions of this file are derived from material licensed 45 * to the University of California by American Telephone and Telegraph 46 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 47 * the permission of UNIX System Laboratories, Inc. 48 * 49 * Copyright (c) 1994 Bruce D. Evans. 50 * All rights reserved. 51 * 52 * Copyright (c) 1990 The Regents of the University of California. 53 * All rights reserved. 54 * 55 * This code is derived from software contributed to Berkeley by 56 * William Jolitz. 57 * 58 * Copyright (c) 1982, 1986, 1988 Regents of the University of California. 59 * All rights reserved. 60 * 61 * Redistribution and use in source and binary forms, with or without 62 * modification, are permitted provided that the following conditions 63 * are met: 64 * 1. Redistributions of source code must retain the above copyright 65 * notice, this list of conditions and the following disclaimer. 66 * 2. Redistributions in binary form must reproduce the above copyright 67 * notice, this list of conditions and the following disclaimer in the 68 * documentation and/or other materials provided with the distribution. 69 * 3. Neither the name of the University nor the names of its contributors 70 * may be used to endorse or promote products derived from this software 71 * without specific prior written permission. 72 * 73 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 74 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 75 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 76 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 77 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 78 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 79 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 80 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 81 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 82 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 83 * SUCH DAMAGE. 84 * 85 * @(#)ufs_disksubr.c 8.5 (Berkeley) 1/21/94 86 * $FreeBSD: src/sys/kern/subr_disk.c,v 1.20.2.6 2001/10/05 07:14:57 peter Exp $ 87 * $FreeBSD: src/sys/ufs/ufs/ufs_disksubr.c,v 1.44.2.3 2001/03/05 05:42:19 obrien Exp $ 88 */ 89 90 #include <sys/param.h> 91 #include <sys/systm.h> 92 #include <sys/kernel.h> 93 #include <sys/malloc.h> 94 #include <sys/proc.h> 95 #include <sys/sysctl.h> 96 #include <sys/buf.h> 97 #include <sys/conf.h> 98 #include <sys/disklabel.h> 99 #include <sys/disklabel32.h> 100 #include <sys/diskslice.h> 101 #include <sys/disk.h> 102 #include <sys/dtype.h> /* DTYPE_* constants */ 103 #include <machine/md_var.h> 104 #include <sys/ctype.h> 105 #include <sys/syslog.h> 106 #include <sys/device.h> 107 #include <sys/msgport.h> 108 #include <sys/msgport2.h> 109 #include <sys/buf2.h> 110 111 #include <vfs/ufs/dinode.h> /* XXX used only for fs.h */ 112 #include <vfs/ufs/fs.h> /* XXX used only to get BBSIZE/SBSIZE */ 113 114 static void partition_info(const char *sname, int part, struct partition32 *pp); 115 static void slice_info(const char *sname, struct diskslice *sp); 116 static const char *l32_fixlabel(const char *sname, struct diskslice *sp, 117 disklabel_t lpx, int writeflag); 118 119 /* 120 * Retrieve the partition start and extent, in blocks. Return 0 on success, 121 * EINVAL on error. 122 */ 123 static int 124 l32_getpartbounds(struct diskslices *ssp, disklabel_t lp, u_int32_t part, 125 u_int64_t *start, u_int64_t *blocks) 126 { 127 struct partition32 *pp; 128 129 if (part >= lp.lab32->d_npartitions) 130 return (EINVAL); 131 pp = &lp.lab32->d_partitions[part]; 132 *start = pp->p_offset; 133 *blocks = pp->p_size; 134 return(0); 135 } 136 137 static void 138 l32_loadpartinfo(disklabel_t lp, u_int32_t part, struct partinfo *dpart) 139 { 140 struct partition32 *pp; 141 const size_t uuid_size = sizeof(struct uuid); 142 143 bzero(&dpart->fstype_uuid, uuid_size); 144 bzero(&dpart->storage_uuid, uuid_size); 145 if (part < lp.lab32->d_npartitions) { 146 pp = &lp.lab32->d_partitions[part]; 147 dpart->fstype = pp->p_fstype; 148 } else { 149 dpart->fstype = 0; 150 } 151 } 152 153 static u_int32_t 154 l32_getnumparts(disklabel_t lp) 155 { 156 return(lp.lab32->d_npartitions); 157 } 158 159 static int 160 l32_getpackname(disklabel_t lp, char *buf, size_t bytes) 161 { 162 size_t slen; 163 164 if (lp.lab32->d_packname[0] == 0) { 165 buf[0] = 0; 166 return -1; 167 } 168 slen = strnlen(lp.lab32->d_packname, sizeof(lp.lab32->d_packname)); 169 if (slen >= bytes) 170 slen = bytes - 1; 171 bcopy(lp.lab32->d_packname, buf, slen); 172 buf[slen] = 0; 173 174 return 0; 175 } 176 177 static void 178 l32_freedisklabel(disklabel_t *lpp) 179 { 180 kfree((*lpp).lab32, M_DEVBUF); 181 (*lpp).lab32 = NULL; 182 } 183 184 /* 185 * Attempt to read a disk label from a device. 186 * 187 * Returns NULL on sucess, and an error string on failure 188 */ 189 static const char * 190 l32_readdisklabel(cdev_t dev, struct diskslice *sp, disklabel_t *lpp, 191 struct disk_info *info) 192 { 193 disklabel_t lpx; 194 struct buf *bp; 195 struct disklabel32 *dlp; 196 const char *msg = NULL; 197 int secsize = info->d_media_blksize; 198 199 bp = getpbuf_mem(NULL); 200 KKASSERT(secsize <= bp->b_bufsize); 201 bp->b_bio1.bio_offset = (off_t)LABELSECTOR32 * secsize; 202 bp->b_bio1.bio_done = biodone_sync; 203 bp->b_bio1.bio_flags |= BIO_SYNC; 204 bp->b_bcount = secsize; 205 bp->b_flags &= ~B_INVAL; 206 bp->b_cmd = BUF_CMD_READ; 207 bp->b_flags |= B_FAILONDIS; 208 dev_dstrategy(dev, &bp->b_bio1); 209 if (biowait(&bp->b_bio1, "labrd")) 210 msg = "I/O error"; 211 else for (dlp = (struct disklabel32 *)bp->b_data; 212 dlp <= (struct disklabel32 *)((char *)bp->b_data + 213 secsize - sizeof(*dlp)); 214 dlp = (struct disklabel32 *)((char *)dlp + sizeof(long))) { 215 if (dlp->d_magic != DISKMAGIC32 || 216 dlp->d_magic2 != DISKMAGIC32) { 217 /* 218 * NOTE! dsreadandsetlabel() does a strcmp() on 219 * this string. 220 */ 221 if (msg == NULL) 222 msg = "no disk label"; 223 } else if (dlp->d_npartitions > MAXPARTITIONS32 || 224 dkcksum32(dlp) != 0) { 225 msg = "disk label corrupted"; 226 } else { 227 lpx.lab32 = dlp; 228 msg = l32_fixlabel(NULL, sp, lpx, FALSE); 229 if (msg == NULL) { 230 (*lpp).lab32 = kmalloc(sizeof(*dlp), 231 M_DEVBUF, M_WAITOK|M_ZERO); 232 *(*lpp).lab32 = *dlp; 233 } 234 break; 235 } 236 } 237 bp->b_flags |= B_INVAL | B_AGE; 238 relpbuf(bp, NULL); 239 240 return (msg); 241 } 242 243 /* 244 * Check new disk label for sensibility before setting it. 245 */ 246 static int 247 l32_setdisklabel(disklabel_t olpx, disklabel_t nlpx, struct diskslices *ssp, 248 struct diskslice *sp, u_int32_t *openmask) 249 { 250 struct disklabel32 *olp, *nlp; 251 struct partition32 *opp, *npp; 252 int part; 253 int i; 254 255 olp = olpx.lab32; 256 nlp = nlpx.lab32; 257 258 /* 259 * Check it is actually a disklabel we are looking at. 260 */ 261 if (nlp->d_magic != DISKMAGIC32 || nlp->d_magic2 != DISKMAGIC32 || 262 dkcksum32(nlp) != 0) 263 return (EINVAL); 264 265 /* 266 * For each partition that we think is open, check the new disklabel 267 * for compatibility. Ignore special partitions (>= 128). 268 */ 269 i = 0; 270 while (i < 128) { 271 if (openmask[i >> 5] == 0) { 272 i += 32; 273 continue; 274 } 275 if ((openmask[i >> 5] & (1 << (i & 31))) == 0) { 276 ++i; 277 continue; 278 } 279 if (nlp->d_npartitions <= i) 280 return (EBUSY); 281 opp = &olp->d_partitions[i]; 282 npp = &nlp->d_partitions[i]; 283 if (npp->p_offset != opp->p_offset || npp->p_size < opp->p_size) 284 return (EBUSY); 285 /* 286 * Copy internally-set partition information 287 * if new label doesn't include it. XXX 288 * (If we are using it then we had better stay the same type) 289 * This is possibly dubious, as someone else noted (XXX) 290 */ 291 if (npp->p_fstype == FS_UNUSED && opp->p_fstype != FS_UNUSED) { 292 npp->p_fstype = opp->p_fstype; 293 npp->p_fsize = opp->p_fsize; 294 npp->p_frag = opp->p_frag; 295 npp->p_cpg = opp->p_cpg; 296 } 297 ++i; 298 } 299 nlp->d_checksum = 0; 300 nlp->d_checksum = dkcksum32(nlp); 301 *olp = *nlp; 302 303 if (olp->d_partitions[RAW_PART].p_offset) 304 return (EXDEV); 305 if (olp->d_secperunit > sp->ds_size) 306 return (ENOSPC); 307 for (part = 0; part < olp->d_npartitions; ++part) { 308 if (olp->d_partitions[part].p_size > sp->ds_size) 309 return(ENOSPC); 310 } 311 return (0); 312 } 313 314 /* 315 * Write disk label back to device after modification. 316 */ 317 static int 318 l32_writedisklabel(cdev_t dev, struct diskslices *ssp, struct diskslice *sp, 319 disklabel_t lpx) 320 { 321 struct disklabel32 *lp; 322 struct disklabel32 *dlp; 323 struct buf *bp; 324 const char *msg; 325 int error = 0; 326 327 lp = lpx.lab32; 328 329 if (lp->d_partitions[RAW_PART].p_offset != 0) 330 return (EXDEV); /* not quite right */ 331 332 bp = getpbuf_mem(NULL); 333 KKASSERT((int)lp->d_secsize <= bp->b_bufsize); 334 bp->b_bio1.bio_offset = (off_t)LABELSECTOR32 * lp->d_secsize; 335 bp->b_bio1.bio_done = biodone_sync; 336 bp->b_bio1.bio_flags |= BIO_SYNC; 337 bp->b_bcount = lp->d_secsize; 338 bp->b_flags |= B_FAILONDIS; 339 340 #if 1 341 /* 342 * We read the label first to see if it's there, 343 * in which case we will put ours at the same offset into the block.. 344 * (I think this is stupid [Julian]) 345 * Note that you can't write a label out over a corrupted label! 346 * (also stupid.. how do you write the first one? by raw writes?) 347 */ 348 bp->b_flags &= ~B_INVAL; 349 bp->b_cmd = BUF_CMD_READ; 350 KKASSERT(dkpart(dev) == WHOLE_SLICE_PART); 351 dev_dstrategy(dev, &bp->b_bio1); 352 error = biowait(&bp->b_bio1, "labrd"); 353 if (error) 354 goto done; 355 for (dlp = (struct disklabel32 *)bp->b_data; 356 dlp <= (struct disklabel32 *) 357 ((char *)bp->b_data + lp->d_secsize - sizeof(*dlp)); 358 dlp = (struct disklabel32 *)((char *)dlp + sizeof(long))) { 359 if (dlp->d_magic == DISKMAGIC32 && 360 dlp->d_magic2 == DISKMAGIC32 && dkcksum32(dlp) == 0) { 361 *dlp = *lp; 362 lpx.lab32 = dlp; 363 msg = l32_fixlabel(NULL, sp, lpx, TRUE); 364 if (msg) { 365 error = EINVAL; 366 } else { 367 bp->b_cmd = BUF_CMD_WRITE; 368 bp->b_bio1.bio_done = biodone_sync; 369 bp->b_bio1.bio_flags |= BIO_SYNC; 370 KKASSERT(dkpart(dev) == WHOLE_SLICE_PART); 371 dev_dstrategy(dev, &bp->b_bio1); 372 error = biowait(&bp->b_bio1, "labwr"); 373 } 374 goto done; 375 } 376 } 377 error = ESRCH; 378 done: 379 #else 380 bzero(bp->b_data, lp->d_secsize); 381 dlp = (struct disklabel32 *)bp->b_data; 382 *dlp = *lp; 383 bp->b_flags &= ~B_INVAL; 384 bp->b_cmd = BUF_CMD_WRITE; 385 bp->b_bio1.bio_done = biodone_sync; 386 bp->b_bio1.bio_flags |= BIO_SYNC; 387 BUF_STRATEGY(bp, 1); 388 error = biowait(&bp->b_bio1, "labwr"); 389 #endif 390 bp->b_flags |= B_INVAL | B_AGE; 391 relpbuf(bp, NULL); 392 393 return (error); 394 } 395 396 /* 397 * Create a disklabel based on a disk_info structure, initializing 398 * the appropriate fields and creating a raw partition that covers the 399 * whole disk. 400 * 401 * If a diskslice is passed, the label is truncated to the slice 402 */ 403 static disklabel_t 404 l32_clone_label(struct disk_info *info, struct diskslice *sp) 405 { 406 struct disklabel32 *lp; 407 disklabel_t res; 408 409 lp = kmalloc(sizeof *lp, M_DEVBUF, M_WAITOK | M_ZERO); 410 lp->d_nsectors = info->d_secpertrack; 411 lp->d_ntracks = info->d_nheads; 412 lp->d_secpercyl = info->d_secpercyl; 413 lp->d_secsize = info->d_media_blksize; 414 415 if (sp) 416 lp->d_secperunit = (u_int)sp->ds_size; 417 else 418 lp->d_secperunit = (u_int)info->d_media_blocks; 419 420 if (lp->d_typename[0] == '\0') 421 strncpy(lp->d_typename, "amnesiac", sizeof(lp->d_typename)); 422 if (lp->d_packname[0] == '\0') 423 strncpy(lp->d_packname, "fictitious", sizeof(lp->d_packname)); 424 if (lp->d_nsectors == 0) 425 lp->d_nsectors = 32; 426 if (lp->d_ntracks == 0) 427 lp->d_ntracks = 64; 428 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks; 429 lp->d_ncylinders = lp->d_secperunit / lp->d_secpercyl; 430 if (lp->d_rpm == 0) 431 lp->d_rpm = 3600; 432 if (lp->d_interleave == 0) 433 lp->d_interleave = 1; 434 if (lp->d_npartitions < RAW_PART + 1) 435 lp->d_npartitions = MAXPARTITIONS32; 436 if (lp->d_bbsize == 0) 437 lp->d_bbsize = BBSIZE; 438 if (lp->d_sbsize == 0) 439 lp->d_sbsize = SBSIZE; 440 441 /* 442 * Used by various devices to create a compatibility slice which 443 * allows us to mount root from devices which do not have a 444 * disklabel. Particularly: CDs. 445 */ 446 lp->d_partitions[RAW_PART].p_size = lp->d_secperunit; 447 if (info->d_dsflags & DSO_COMPATPARTA) { 448 lp->d_partitions[0].p_size = lp->d_secperunit; 449 lp->d_partitions[0].p_fstype = FS_OTHER; 450 } 451 lp->d_magic = DISKMAGIC32; 452 lp->d_magic2 = DISKMAGIC32; 453 lp->d_checksum = dkcksum32(lp); 454 res.lab32 = lp; 455 return (res); 456 } 457 458 static void 459 l32_makevirginlabel(disklabel_t lpx, struct diskslices *ssp, 460 struct diskslice *sp, struct disk_info *info) 461 { 462 struct disklabel32 *lp = lpx.lab32; 463 struct partition32 *pp; 464 disklabel_t template; 465 466 template = l32_clone_label(info, NULL); 467 bcopy(template.opaque, lp, sizeof(struct disklabel32)); 468 469 lp->d_magic = DISKMAGIC32; 470 lp->d_magic2 = DISKMAGIC32; 471 472 lp->d_npartitions = MAXPARTITIONS32; 473 if (lp->d_interleave == 0) 474 lp->d_interleave = 1; 475 if (lp->d_rpm == 0) 476 lp->d_rpm = 3600; 477 if (lp->d_nsectors == 0) /* sectors per track */ 478 lp->d_nsectors = 32; 479 if (lp->d_ntracks == 0) /* heads */ 480 lp->d_ntracks = 64; 481 lp->d_ncylinders = 0; 482 lp->d_bbsize = BBSIZE; 483 lp->d_sbsize = SBSIZE; 484 485 /* 486 * If the slice or GPT partition is really small we could 487 * wind up with an absurd calculation for ncylinders. 488 */ 489 while (lp->d_ncylinders < 4) { 490 if (lp->d_ntracks > 1) 491 lp->d_ntracks >>= 1; 492 else if (lp->d_nsectors > 1) 493 lp->d_nsectors >>= 1; 494 else 495 break; 496 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks; 497 lp->d_ncylinders = sp->ds_size / lp->d_secpercyl; 498 } 499 500 /* 501 * Set or Modify the partition sizes to accomodate the slice, 502 * since we started with a copy of the virgin label stored 503 * in the whole-disk-slice and we are probably not a 504 * whole-disk slice. 505 */ 506 lp->d_secperunit = sp->ds_size; 507 pp = &lp->d_partitions[RAW_PART]; 508 pp->p_offset = 0; 509 pp->p_size = lp->d_secperunit; 510 if (info->d_dsflags & DSO_COMPATPARTA) { 511 pp = &lp->d_partitions[0]; 512 pp->p_offset = 0; 513 pp->p_size = lp->d_secperunit; 514 pp->p_fstype = FS_OTHER; 515 } 516 lp->d_checksum = 0; 517 lp->d_checksum = dkcksum32(lp); 518 519 kfree(template.opaque, M_DEVBUF); 520 } 521 522 static const char * 523 l32_fixlabel(const char *sname, struct diskslice *sp, 524 disklabel_t lpx, int writeflag) 525 { 526 struct disklabel32 *lp; 527 struct partition32 *pp; 528 u_int64_t start; 529 u_int64_t end; 530 u_int64_t offset; 531 int part; 532 int warned; 533 534 lp = lpx.lab32; 535 536 /* These errors "can't happen" so don't bother reporting details. */ 537 if (lp->d_magic != DISKMAGIC32 || lp->d_magic2 != DISKMAGIC32) 538 return ("fixlabel: invalid magic"); 539 if (dkcksum32(lp) != 0) 540 return ("fixlabel: invalid checksum"); 541 542 pp = &lp->d_partitions[RAW_PART]; 543 544 /* 545 * What a mess. For ages old backwards compatibility the disklabel 546 * on-disk stores absolute offsets instead of slice-relative offsets. 547 * So fix it up when reading, writing, or snooping. 548 * 549 * The in-core label is always slice-relative. 550 */ 551 if (writeflag) { 552 start = 0; 553 offset = sp->ds_offset; 554 } else { 555 start = sp->ds_offset; 556 offset = -sp->ds_offset; 557 } 558 if (pp->p_offset != start) { 559 if (sname != NULL) { 560 kprintf( 561 "%s: rejecting BSD label: raw partition offset != slice offset\n", 562 sname); 563 slice_info(sname, sp); 564 partition_info(sname, RAW_PART, pp); 565 } 566 return ("fixlabel: raw partition offset != slice offset"); 567 } 568 if (pp->p_size != sp->ds_size) { 569 if (sname != NULL) { 570 kprintf("%s: raw partition size != slice size\n", sname); 571 slice_info(sname, sp); 572 partition_info(sname, RAW_PART, pp); 573 } 574 if (pp->p_size > sp->ds_size) { 575 if (sname == NULL) 576 return ("fixlabel: raw partition size > slice size"); 577 kprintf("%s: truncating raw partition\n", sname); 578 pp->p_size = sp->ds_size; 579 } 580 } 581 end = start + sp->ds_size; 582 if (start > end) 583 return ("fixlabel: slice wraps"); 584 if (lp->d_secpercyl <= 0) 585 return ("fixlabel: d_secpercyl <= 0"); 586 pp -= RAW_PART; 587 warned = FALSE; 588 for (part = 0; part < lp->d_npartitions; part++, pp++) { 589 if (pp->p_offset != 0 || pp->p_size != 0) { 590 if (pp->p_offset < start 591 || pp->p_offset + pp->p_size > end 592 || pp->p_offset + pp->p_size < pp->p_offset) { 593 if (sname != NULL) { 594 kprintf( 595 "%s: rejecting partition in BSD label: it isn't entirely within the slice\n", 596 sname); 597 if (!warned) { 598 slice_info(sname, sp); 599 warned = TRUE; 600 } 601 partition_info(sname, part, pp); 602 } 603 /* XXX else silently discard junk. */ 604 bzero(pp, sizeof *pp); 605 } else { 606 pp->p_offset += offset; 607 } 608 } 609 } 610 lp->d_ncylinders = sp->ds_size / lp->d_secpercyl; 611 lp->d_secperunit = sp->ds_size; 612 lp->d_checksum = 0; 613 lp->d_checksum = dkcksum32(lp); 614 return (NULL); 615 } 616 617 /* 618 * Set the number of blocks at the beginning of the slice which have 619 * been reserved for label operations. This area will be write-protected 620 * when accessed via the slice. 621 */ 622 static void 623 l32_adjust_label_reserved(struct diskslices *ssp, int slice, 624 struct diskslice *sp) 625 { 626 /*struct disklabel32 *lp = sp->ds_label.lab32;*/ 627 sp->ds_reserved = SBSIZE / ssp->dss_secsize; 628 } 629 630 static void 631 partition_info(const char *sname, int part, struct partition32 *pp) 632 { 633 kprintf("%s%c: start %lu, end %lu, size %lu\n", sname, 'a' + part, 634 (u_long)pp->p_offset, (u_long)(pp->p_offset + pp->p_size - 1), 635 (u_long)pp->p_size); 636 } 637 638 static void 639 slice_info(const char *sname, struct diskslice *sp) 640 { 641 kprintf("%s: start %llu, end %llu, size %llu\n", sname, 642 (long long)sp->ds_offset, 643 (long long)sp->ds_offset + sp->ds_size - 1, 644 (long long)sp->ds_size); 645 } 646 647 struct disklabel_ops disklabel32_ops = { 648 .labelsize = sizeof(struct disklabel32), 649 .op_readdisklabel = l32_readdisklabel, 650 .op_setdisklabel = l32_setdisklabel, 651 .op_writedisklabel = l32_writedisklabel, 652 .op_clone_label = l32_clone_label, 653 .op_adjust_label_reserved = l32_adjust_label_reserved, 654 .op_getpartbounds = l32_getpartbounds, 655 .op_loadpartinfo = l32_loadpartinfo, 656 .op_getnumparts = l32_getnumparts, 657 .op_makevirginlabel = l32_makevirginlabel, 658 .op_getpackname = l32_getpackname, 659 .op_freedisklabel = l32_freedisklabel 660 }; 661 662