sys/kern/subr_disklabel32.c

   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/proc.h>
  94 #include <sys/sysctl.h>
  95 #include <sys/buf.h>
  96 #include <sys/conf.h>
  97 #include <sys/disklabel.h>
  98 #include <sys/disklabel32.h>
  99 #include <sys/diskslice.h>
 100 #include <sys/disk.h>
 101 #include <sys/dtype.h>          /* DTYPE_* constants */
 102 #include <machine/md_var.h>
 103 #include <sys/ctype.h>
 104 #include <sys/syslog.h>
 105 #include <sys/device.h>
 106 #include <sys/msgport.h>
 107 #include <sys/msgport2.h>
 108 #include <sys/buf2.h>
 109
 110 #include <vfs/ufs/dinode.h>     /* XXX used only for fs.h */
 111 #include <vfs/ufs/fs.h>         /* XXX used only to get BBSIZE/SBSIZE */
 112
 113 static void partition_info(const char *sname, int part, struct partition32 *pp);
 114 static void slice_info(const char *sname, struct diskslice *sp);
 115 static const char *l32_fixlabel(const char *sname, struct diskslice *sp,
 116                                 disklabel_t lpx, int writeflag);
 117
 118 /*
 119  * Retrieve the partition start and extent, in blocks.  Return 0 on success,
 120  * EINVAL on error.
 121  */
 122 static int
 123 l32_getpartbounds(struct diskslices *ssp, disklabel_t lp, u_int32_t part,
 124                   u_int64_t *start, u_int64_t *blocks)
 125 {
 126         struct partition32 *pp;
 127
 128         if (part >= lp.lab32->d_npartitions)
 129                 return (EINVAL);
 130         pp = &lp.lab32->d_partitions[part];
 131         *start = pp->p_offset;
 132         *blocks = pp->p_size;
 133         return(0);
 134 }
 135
 136 static void
 137 l32_loadpartinfo(disklabel_t lp, u_int32_t part, struct partinfo *dpart)
 138 {
 139         struct partition32 *pp;
 140         const size_t uuid_size = sizeof(struct uuid);
 141
 142         bzero(&dpart->fstype_uuid, uuid_size);
 143         bzero(&dpart->storage_uuid, uuid_size);
 144         if (part < lp.lab32->d_npartitions) {
 145                 pp = &lp.lab32->d_partitions[part];
 146                 dpart->fstype = pp->p_fstype;
 147         } else {
 148                 dpart->fstype = 0;
 149         }
 150 }
 151
 152 static u_int32_t
 153 l32_getnumparts(disklabel_t lp)
 154 {
 155         return(lp.lab32->d_npartitions);
 156 }
 157
 158 static void
 159 l32_freedisklabel(disklabel_t *lpp)
 160 {
 161         kfree((*lpp).lab32, M_DEVBUF);
 162         (*lpp).lab32 = NULL;
 163 }
 164
 165 /*
 166  * Attempt to read a disk label from a device.
 167  *
 168  * Returns NULL on sucess, and an error string on failure
 169  */
 170 static const char *
 171 l32_readdisklabel(cdev_t dev, struct diskslice *sp, disklabel_t *lpp,
 172                 struct disk_info *info)
 173 {
 174         disklabel_t lpx;
 175         struct buf *bp;
 176         struct disklabel32 *dlp;
 177         const char *msg = NULL;
 178         int secsize = info->d_media_blksize;
 179
 180         bp = getpbuf_mem(NULL);
 181         KKASSERT(secsize <= bp->b_bufsize);
 182         bp->b_bio1.bio_offset = (off_t)LABELSECTOR32 * secsize;
 183         bp->b_bio1.bio_done = biodone_sync;
 184         bp->b_bio1.bio_flags |= BIO_SYNC;
 185         bp->b_bcount = secsize;
 186         bp->b_flags &= ~B_INVAL;
 187         bp->b_cmd = BUF_CMD_READ;
 188         bp->b_flags |= B_FAILONDIS;
 189         dev_dstrategy(dev, &bp->b_bio1);
 190         if (biowait(&bp->b_bio1, "labrd"))
 191                 msg = "I/O error";
 192         else for (dlp = (struct disklabel32 *)bp->b_data;
 193             dlp <= (struct disklabel32 *)((char *)bp->b_data +
 194             secsize - sizeof(*dlp));
 195             dlp = (struct disklabel32 *)((char *)dlp + sizeof(long))) {
 196                 if (dlp->d_magic != DISKMAGIC32 ||
 197                     dlp->d_magic2 != DISKMAGIC32) {
 198                         /*
 199                          * NOTE! dsreadandsetlabel() does a strcmp() on
 200                          * this string.
 201                          */
 202                         if (msg == NULL)
 203                                 msg = "no disk label";
 204                 } else if (dlp->d_npartitions > MAXPARTITIONS32 ||
 205                            dkcksum32(dlp) != 0) {
 206                         msg = "disk label corrupted";
 207                 } else {
 208                         lpx.lab32 = dlp;
 209                         msg = l32_fixlabel(NULL, sp, lpx, FALSE);
 210                         if (msg == NULL) {
 211                                 (*lpp).lab32 = kmalloc(sizeof(*dlp),
 212                                                        M_DEVBUF, M_WAITOK|M_ZERO);
 213                                 *(*lpp).lab32 = *dlp;
 214                         }
 215                         break;
 216                 }
 217         }
 218         bp->b_flags |= B_INVAL | B_AGE;
 219         relpbuf(bp, NULL);
 220
 221         return (msg);
 222 }
 223
 224 /*
 225  * Check new disk label for sensibility before setting it.
 226  */
 227 static int
 228 l32_setdisklabel(disklabel_t olpx, disklabel_t nlpx, struct diskslices *ssp,
 229                  struct diskslice *sp, u_int32_t *openmask)
 230 {
 231         struct disklabel32 *olp, *nlp;
 232         struct partition32 *opp, *npp;
 233         int part;
 234         int i;
 235
 236         olp = olpx.lab32;
 237         nlp = nlpx.lab32;
 238
 239         /*
 240          * Check it is actually a disklabel we are looking at.
 241          */
 242         if (nlp->d_magic != DISKMAGIC32 || nlp->d_magic2 != DISKMAGIC32 ||
 243             dkcksum32(nlp) != 0)
 244                 return (EINVAL);
 245
 246         /*
 247          * For each partition that we think is open, check the new disklabel
 248          * for compatibility.  Ignore special partitions (>= 128).
 249          */
 250         i = 0;
 251         while (i < 128) {
 252                 if (openmask[i >> 5] == 0) {
 253                         i += 32;
 254                         continue;
 255                 }
 256                 if ((openmask[i >> 5] & (1 << (i & 31))) == 0) {
 257                         ++i;
 258                         continue;
 259                 }
 260                 if (nlp->d_npartitions <= i)
 261                         return (EBUSY);
 262                 opp = &olp->d_partitions[i];
 263                 npp = &nlp->d_partitions[i];
 264                 if (npp->p_offset != opp->p_offset || npp->p_size < opp->p_size)
 265                         return (EBUSY);
 266                 /*
 267                  * Copy internally-set partition information
 268                  * if new label doesn't include it.             XXX
 269                  * (If we are using it then we had better stay the same type)
 270                  * This is possibly dubious, as someone else noted (XXX)
 271                  */
 272                 if (npp->p_fstype == FS_UNUSED && opp->p_fstype != FS_UNUSED) {
 273                         npp->p_fstype = opp->p_fstype;
 274                         npp->p_fsize = opp->p_fsize;
 275                         npp->p_frag = opp->p_frag;
 276                         npp->p_cpg = opp->p_cpg;
 277                 }
 278                 ++i;
 279         }
 280         nlp->d_checksum = 0;
 281         nlp->d_checksum = dkcksum32(nlp);
 282         *olp = *nlp;
 283
 284         if (olp->d_partitions[RAW_PART].p_offset)
 285                 return (EXDEV);
 286         if (olp->d_secperunit > sp->ds_size)
 287                 return (ENOSPC);
 288         for (part = 0; part < olp->d_npartitions; ++part) {
 289                 if (olp->d_partitions[part].p_size > sp->ds_size)
 290                         return(ENOSPC);
 291         }
 292         return (0);
 293 }
 294
 295 /*
 296  * Write disk label back to device after modification.
 297  */
 298 static int
 299 l32_writedisklabel(cdev_t dev, struct diskslices *ssp, struct diskslice *sp,
 300                    disklabel_t lpx)
 301 {
 302         struct disklabel32 *lp;
 303         struct disklabel32 *dlp;
 304         struct buf *bp;
 305         const char *msg;
 306         int error = 0;
 307
 308         lp = lpx.lab32;
 309
 310         if (lp->d_partitions[RAW_PART].p_offset != 0)
 311                 return (EXDEV);                 /* not quite right */
 312
 313         bp = getpbuf_mem(NULL);
 314         KKASSERT((int)lp->d_secsize <= bp->b_bufsize);
 315         bp->b_bio1.bio_offset = (off_t)LABELSECTOR32 * lp->d_secsize;
 316         bp->b_bio1.bio_done = biodone_sync;
 317         bp->b_bio1.bio_flags |= BIO_SYNC;
 318         bp->b_bcount = lp->d_secsize;
 319         bp->b_flags |= B_FAILONDIS;
 320
 321 #if 1
 322         /*
 323          * We read the label first to see if it's there,
 324          * in which case we will put ours at the same offset into the block..
 325          * (I think this is stupid [Julian])
 326          * Note that you can't write a label out over a corrupted label!
 327          * (also stupid.. how do you write the first one? by raw writes?)
 328          */
 329         bp->b_flags &= ~B_INVAL;
 330         bp->b_cmd = BUF_CMD_READ;
 331         KKASSERT(dkpart(dev) == WHOLE_SLICE_PART);
 332         dev_dstrategy(dev, &bp->b_bio1);
 333         error = biowait(&bp->b_bio1, "labrd");
 334         if (error)
 335                 goto done;
 336         for (dlp = (struct disklabel32 *)bp->b_data;
 337             dlp <= (struct disklabel32 *)
 338               ((char *)bp->b_data + lp->d_secsize - sizeof(*dlp));
 339             dlp = (struct disklabel32 *)((char *)dlp + sizeof(long))) {
 340                 if (dlp->d_magic == DISKMAGIC32 &&
 341                     dlp->d_magic2 == DISKMAGIC32 && dkcksum32(dlp) == 0) {
 342                         *dlp = *lp;
 343                         lpx.lab32 = dlp;
 344                         msg = l32_fixlabel(NULL, sp, lpx, TRUE);
 345                         if (msg) {
 346                                 error = EINVAL;
 347                         } else {
 348                                 bp->b_cmd = BUF_CMD_WRITE;
 349                                 bp->b_bio1.bio_done = biodone_sync;
 350                                 bp->b_bio1.bio_flags |= BIO_SYNC;
 351                                 KKASSERT(dkpart(dev) == WHOLE_SLICE_PART);
 352                                 dev_dstrategy(dev, &bp->b_bio1);
 353                                 error = biowait(&bp->b_bio1, "labwr");
 354                         }
 355                         goto done;
 356                 }
 357         }
 358         error = ESRCH;
 359 done:
 360 #else
 361         bzero(bp->b_data, lp->d_secsize);
 362         dlp = (struct disklabel32 *)bp->b_data;
 363         *dlp = *lp;
 364         bp->b_flags &= ~B_INVAL;
 365         bp->b_cmd = BUF_CMD_WRITE;
 366         bp->b_bio1.bio_done = biodone_sync;
 367         bp->b_bio1.bio_flags |= BIO_SYNC;
 368         BUF_STRATEGY(bp, 1);
 369         error = biowait(&bp->b_bio1, "labwr");
 370 #endif
 371         bp->b_flags |= B_INVAL | B_AGE;
 372         relpbuf(bp, NULL);
 373
 374         return (error);
 375 }
 376
 377 /*
 378  * Create a disklabel based on a disk_info structure, initializing
 379  * the appropriate fields and creating a raw partition that covers the
 380  * whole disk.
 381  *
 382  * If a diskslice is passed, the label is truncated to the slice
 383  */
 384 static disklabel_t
 385 l32_clone_label(struct disk_info *info, struct diskslice *sp)
 386 {
 387         struct disklabel32 *lp;
 388         disklabel_t res;
 389
 390         lp = kmalloc(sizeof *lp, M_DEVBUF, M_WAITOK | M_ZERO);
 391         lp->d_nsectors = info->d_secpertrack;
 392         lp->d_ntracks = info->d_nheads;
 393         lp->d_secpercyl = info->d_secpercyl;
 394         lp->d_secsize = info->d_media_blksize;
 395
 396         if (sp)
 397                 lp->d_secperunit = (u_int)sp->ds_size;
 398         else
 399                 lp->d_secperunit = (u_int)info->d_media_blocks;
 400
 401         if (lp->d_typename[0] == '\0')
 402                 strncpy(lp->d_typename, "amnesiac", sizeof(lp->d_typename));
 403         if (lp->d_packname[0] == '\0')
 404                 strncpy(lp->d_packname, "fictitious", sizeof(lp->d_packname));
 405         if (lp->d_nsectors == 0)
 406                 lp->d_nsectors = 32;
 407         if (lp->d_ntracks == 0)
 408                 lp->d_ntracks = 64;
 409         lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks;
 410         lp->d_ncylinders = lp->d_secperunit / lp->d_secpercyl;
 411         if (lp->d_rpm == 0)
 412                 lp->d_rpm = 3600;
 413         if (lp->d_interleave == 0)
 414                 lp->d_interleave = 1;
 415         if (lp->d_npartitions < RAW_PART + 1)
 416                 lp->d_npartitions = MAXPARTITIONS32;
 417         if (lp->d_bbsize == 0)
 418                 lp->d_bbsize = BBSIZE;
 419         if (lp->d_sbsize == 0)
 420                 lp->d_sbsize = SBSIZE;
 421
 422         /*
 423          * Used by various devices to create a compatibility slice which
 424          * allows us to mount root from devices which do not have a
 425          * disklabel.  Particularly: CDs.
 426          */
 427         lp->d_partitions[RAW_PART].p_size = lp->d_secperunit;
 428         if (info->d_dsflags & DSO_COMPATPARTA) {
 429                 lp->d_partitions[0].p_size = lp->d_secperunit;
 430                 lp->d_partitions[0].p_fstype = FS_OTHER;
 431         }
 432         lp->d_magic = DISKMAGIC32;
 433         lp->d_magic2 = DISKMAGIC32;
 434         lp->d_checksum = dkcksum32(lp);
 435         res.lab32 = lp;
 436         return (res);
 437 }
 438
 439 static void
 440 l32_makevirginlabel(disklabel_t lpx, struct diskslices *ssp,
 441                     struct diskslice *sp, struct disk_info *info)
 442 {
 443         struct disklabel32 *lp = lpx.lab32;
 444         struct partition32 *pp;
 445         disklabel_t template;
 446
 447         template = l32_clone_label(info, NULL);
 448         bcopy(template.opaque, lp, sizeof(struct disklabel32));
 449
 450         lp->d_magic = DISKMAGIC32;
 451         lp->d_magic2 = DISKMAGIC32;
 452
 453         lp->d_npartitions = MAXPARTITIONS32;
 454         if (lp->d_interleave == 0)
 455                 lp->d_interleave = 1;
 456         if (lp->d_rpm == 0)
 457                 lp->d_rpm = 3600;
 458         if (lp->d_nsectors == 0)        /* sectors per track */
 459                 lp->d_nsectors = 32;
 460         if (lp->d_ntracks == 0)         /* heads */
 461                 lp->d_ntracks = 64;
 462         lp->d_ncylinders = 0;
 463         lp->d_bbsize = BBSIZE;
 464         lp->d_sbsize = SBSIZE;
 465
 466         /*
 467          * If the slice or GPT partition is really small we could
 468          * wind up with an absurd calculation for ncylinders.
 469          */
 470         while (lp->d_ncylinders < 4) {
 471                 if (lp->d_ntracks > 1)
 472                         lp->d_ntracks >>= 1;
 473                 else if (lp->d_nsectors > 1)
 474                         lp->d_nsectors >>= 1;
 475                 else
 476                         break;
 477                 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks;
 478                 lp->d_ncylinders = sp->ds_size / lp->d_secpercyl;
 479         }
 480
 481         /*
 482          * Set or Modify the partition sizes to accomodate the slice,
 483          * since we started with a copy of the virgin label stored
 484          * in the whole-disk-slice and we are probably not a
 485          * whole-disk slice.
 486          */
 487         lp->d_secperunit = sp->ds_size;
 488         pp = &lp->d_partitions[RAW_PART];
 489         pp->p_offset = 0;
 490         pp->p_size = lp->d_secperunit;
 491         if (info->d_dsflags & DSO_COMPATPARTA) {
 492                 pp = &lp->d_partitions[0];
 493                 pp->p_offset = 0;
 494                 pp->p_size = lp->d_secperunit;
 495                 pp->p_fstype = FS_OTHER;
 496         }
 497         lp->d_checksum = 0;
 498         lp->d_checksum = dkcksum32(lp);
 499
 500         kfree(template.opaque, M_DEVBUF);
 501 }
 502
 503 static const char *
 504 l32_fixlabel(const char *sname, struct diskslice *sp,
 505              disklabel_t lpx, int writeflag)
 506 {
 507         struct disklabel32 *lp;
 508         struct partition32 *pp;
 509         u_int64_t start;
 510         u_int64_t end;
 511         u_int64_t offset;
 512         int part;
 513         int warned;
 514
 515         lp = lpx.lab32;
 516
 517         /* These errors "can't happen" so don't bother reporting details. */
 518         if (lp->d_magic != DISKMAGIC32 || lp->d_magic2 != DISKMAGIC32)
 519                 return ("fixlabel: invalid magic");
 520         if (dkcksum32(lp) != 0)
 521                 return ("fixlabel: invalid checksum");
 522
 523         pp = &lp->d_partitions[RAW_PART];
 524
 525         /*
 526          * What a mess.  For ages old backwards compatibility the disklabel
 527          * on-disk stores absolute offsets instead of slice-relative offsets.
 528          * So fix it up when reading, writing, or snooping.
 529          *
 530          * The in-core label is always slice-relative.
 531          */
 532         if (writeflag) {
 533                 start = 0;
 534                 offset = sp->ds_offset;
 535         } else {
 536                 start = sp->ds_offset;
 537                 offset = -sp->ds_offset;
 538         }
 539         if (pp->p_offset != start) {
 540                 if (sname != NULL) {
 541                         kprintf(
 542 "%s: rejecting BSD label: raw partition offset != slice offset\n",
 543                                sname);
 544                         slice_info(sname, sp);
 545                         partition_info(sname, RAW_PART, pp);
 546                 }
 547                 return ("fixlabel: raw partition offset != slice offset");
 548         }
 549         if (pp->p_size != sp->ds_size) {
 550                 if (sname != NULL) {
 551                         kprintf("%s: raw partition size != slice size\n", sname);
 552                         slice_info(sname, sp);
 553                         partition_info(sname, RAW_PART, pp);
 554                 }
 555                 if (pp->p_size > sp->ds_size) {
 556                         if (sname == NULL)
 557                                 return ("fixlabel: raw partition size > slice size");
 558                         kprintf("%s: truncating raw partition\n", sname);
 559                         pp->p_size = sp->ds_size;
 560                 }
 561         }
 562         end = start + sp->ds_size;
 563         if (start > end)
 564                 return ("fixlabel: slice wraps");
 565         if (lp->d_secpercyl <= 0)
 566                 return ("fixlabel: d_secpercyl <= 0");
 567         pp -= RAW_PART;
 568         warned = FALSE;
 569         for (part = 0; part < lp->d_npartitions; part++, pp++) {
 570                 if (pp->p_offset != 0 || pp->p_size != 0) {
 571                         if (pp->p_offset < start
 572                             || pp->p_offset + pp->p_size > end
 573                             || pp->p_offset + pp->p_size < pp->p_offset) {
 574                                 if (sname != NULL) {
 575                                         kprintf(
 576 "%s: rejecting partition in BSD label: it isn't entirely within the slice\n",
 577                                                sname);
 578                                         if (!warned) {
 579                                                 slice_info(sname, sp);
 580                                                 warned = TRUE;
 581                                         }
 582                                         partition_info(sname, part, pp);
 583                                 }
 584                                 /* XXX else silently discard junk. */
 585                                 bzero(pp, sizeof *pp);
 586                         } else {
 587                                 pp->p_offset += offset;
 588                         }
 589                 }
 590         }
 591         lp->d_ncylinders = sp->ds_size / lp->d_secpercyl;
 592         lp->d_secperunit = sp->ds_size;
 593         lp->d_checksum = 0;
 594         lp->d_checksum = dkcksum32(lp);
 595         return (NULL);
 596 }
 597
 598 /*
 599  * Set the number of blocks at the beginning of the slice which have
 600  * been reserved for label operations.  This area will be write-protected
 601  * when accessed via the slice.
 602  */
 603 static void
 604 l32_adjust_label_reserved(struct diskslices *ssp, int slice,
 605                           struct diskslice *sp)
 606 {
 607         /*struct disklabel32 *lp = sp->ds_label.lab32;*/
 608         sp->ds_reserved = SBSIZE / ssp->dss_secsize;
 609 }
 610
 611 static void
 612 partition_info(const char *sname, int part, struct partition32 *pp)
 613 {
 614         kprintf("%s%c: start %lu, end %lu, size %lu\n", sname, 'a' + part,
 615                 (u_long)pp->p_offset, (u_long)(pp->p_offset + pp->p_size - 1),
 616                 (u_long)pp->p_size);
 617 }
 618
 619 static void
 620 slice_info(const char *sname, struct diskslice *sp)
 621 {
 622         kprintf("%s: start %llu, end %llu, size %llu\n", sname,
 623                (long long)sp->ds_offset,
 624                (long long)sp->ds_offset + sp->ds_size - 1,
 625                (long long)sp->ds_size);
 626 }
 627
 628 struct disklabel_ops disklabel32_ops = {
 629         .labelsize = sizeof(struct disklabel32),
 630         .op_readdisklabel = l32_readdisklabel,
 631         .op_setdisklabel = l32_setdisklabel,
 632         .op_writedisklabel = l32_writedisklabel,
 633         .op_clone_label = l32_clone_label,
 634         .op_adjust_label_reserved = l32_adjust_label_reserved,
 635         .op_getpartbounds = l32_getpartbounds,
 636         .op_loadpartinfo = l32_loadpartinfo,
 637         .op_getnumparts = l32_getnumparts,
 638         .op_makevirginlabel = l32_makevirginlabel,
 639         .op_freedisklabel = l32_freedisklabel
 640 };
 641