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. All advertising materials mentioning features or use of this software
  70  *    must display the following acknowledgement:
  71  *      This product includes software developed by the University of
  72  *      California, Berkeley and its contributors.
  73  * 4. Neither the name of the University nor the names of its contributors
  74  *    may be used to endorse or promote products derived from this software
  75  *    without specific prior written permission.
  76  *
  77  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  78  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  79  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  80  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  81  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  82  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  83  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  84  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  85  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  86  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  87  * SUCH DAMAGE.
  88  *
  89  *      @(#)ufs_disksubr.c      8.5 (Berkeley) 1/21/94
  90  * $FreeBSD: src/sys/kern/subr_disk.c,v 1.20.2.6 2001/10/05 07:14:57 peter Exp $
  91  * $FreeBSD: src/sys/ufs/ufs/ufs_disksubr.c,v 1.44.2.3 2001/03/05 05:42:19 obrien Exp $
  92  * $DragonFly: src/sys/kern/subr_disklabel32.c,v 1.4 2007/06/19 06:07:57 dillon Exp $
  93  */
  94
  95 #include <sys/param.h>
  96 #include <sys/systm.h>
  97 #include <sys/kernel.h>
  98 #include <sys/proc.h>
  99 #include <sys/sysctl.h>
 100 #include <sys/buf.h>
 101 #include <sys/conf.h>
 102 #include <sys/disklabel.h>
 103 #include <sys/disklabel32.h>
 104 #include <sys/diskslice.h>
 105 #include <sys/disk.h>
 106 #include <sys/dtype.h>          /* DTYPE_* constants */
 107 #include <sys/sysctl.h>
 108 #include <machine/md_var.h>
 109 #include <sys/ctype.h>
 110 #include <sys/syslog.h>
 111 #include <sys/device.h>
 112 #include <sys/msgport.h>
 113 #include <sys/msgport2.h>
 114 #include <sys/buf2.h>
 115
 116 #include <vfs/ufs/dinode.h>     /* XXX used only for fs.h */
 117 #include <vfs/ufs/fs.h>         /* XXX used only to get BBSIZE/SBSIZE */
 118
 119 static void partition_info(const char *sname, int part, struct partition32 *pp);
 120 static void slice_info(const char *sname, struct diskslice *sp);
 121 static const char *l32_fixlabel(const char *sname, struct diskslice *sp,
 122                                 disklabel_t lpx, int writeflag);
 123
 124 /*
 125  * Retrieve the partition start and extent, in blocks.  Return 0 on success,
 126  * EINVAL on error.
 127  */
 128 static int
 129 l32_getpartbounds(struct diskslices *ssp, disklabel_t lp, u_int32_t part,
 130                   u_int64_t *start, u_int64_t *blocks)
 131 {
 132         struct partition32 *pp;
 133
 134         if (part >= lp.lab32->d_npartitions)
 135                 return (EINVAL);
 136         pp = &lp.lab32->d_partitions[part];
 137         *start = pp->p_offset;
 138         *blocks = pp->p_size;
 139         return(0);
 140 }
 141
 142 static void
 143 l32_loadpartinfo(disklabel_t lp, u_int32_t part, struct partinfo *dpart)
 144 {
 145         struct partition32 *pp;
 146         const size_t uuid_size = sizeof(struct uuid);
 147
 148         bzero(&dpart->fstype_uuid, uuid_size);
 149         bzero(&dpart->storage_uuid, uuid_size);
 150         if (part < lp.lab32->d_npartitions) {
 151                 pp = &lp.lab32->d_partitions[part];
 152                 dpart->fstype = pp->p_fstype;
 153         } else {
 154                 dpart->fstype = 0;
 155         }
 156 }
 157
 158 static u_int32_t
 159 l32_getnumparts(disklabel_t lp)
 160 {
 161         return(lp.lab32->d_npartitions);
 162 }
 163
 164 /*
 165  * Attempt to read a disk label from a device.
 166  *
 167  * Returns NULL on sucess, and an error string on failure
 168  */
 169 static const char *
 170 l32_readdisklabel(cdev_t dev, struct diskslice *sp, disklabel_t *lpp,
 171                 struct disk_info *info)
 172 {
 173         disklabel_t lpx;
 174         struct buf *bp;
 175         struct disklabel32 *dlp;
 176         const char *msg = NULL;
 177         int secsize = info->d_media_blksize;
 178
 179         bp = geteblk(secsize);
 180         bp->b_bio1.bio_offset = (off_t)LABELSECTOR32 * secsize;
 181         bp->b_bio1.bio_done = biodone_sync;
 182         bp->b_bio1.bio_flags |= BIO_SYNC;
 183         bp->b_bcount = secsize;
 184         bp->b_flags &= ~B_INVAL;
 185         bp->b_cmd = BUF_CMD_READ;
 186         dev_dstrategy(dev, &bp->b_bio1);
 187         if (biowait(&bp->b_bio1, "labrd"))
 188                 msg = "I/O error";
 189         else for (dlp = (struct disklabel32 *)bp->b_data;
 190             dlp <= (struct disklabel32 *)((char *)bp->b_data +
 191             secsize - sizeof(*dlp));
 192             dlp = (struct disklabel32 *)((char *)dlp + sizeof(long))) {
 193                 if (dlp->d_magic != DISKMAGIC32 ||
 194                     dlp->d_magic2 != DISKMAGIC32) {
 195                         /*
 196                          * NOTE! dsreadandsetlabel() does a strcmp() on
 197                          * this string.
 198                          */
 199                         if (msg == NULL)
 200                                 msg = "no disk label";
 201                 } else if (dlp->d_npartitions > MAXPARTITIONS32 ||
 202                            dkcksum32(dlp) != 0) {
 203                         msg = "disk label corrupted";
 204                 } else {
 205                         lpx.lab32 = dlp;
 206                         msg = l32_fixlabel(NULL, sp, lpx, FALSE);
 207                         if (msg == NULL) {
 208                                 (*lpp).lab32 = kmalloc(sizeof(*dlp),
 209                                                        M_DEVBUF, M_WAITOK|M_ZERO);
 210                                 *(*lpp).lab32 = *dlp;
 211                         }
 212                         break;
 213                 }
 214         }
 215         bp->b_flags |= B_INVAL | B_AGE;
 216         brelse(bp);
 217         return (msg);
 218 }
 219
 220 /*
 221  * Check new disk label for sensibility before setting it.
 222  */
 223 static int
 224 l32_setdisklabel(disklabel_t olpx, disklabel_t nlpx, struct diskslices *ssp,
 225                  struct diskslice *sp, u_int32_t *openmask)
 226 {
 227         struct disklabel32 *olp, *nlp;
 228         struct partition32 *opp, *npp;
 229         int part;
 230         int i;
 231
 232         olp = olpx.lab32;
 233         nlp = nlpx.lab32;
 234
 235         /*
 236          * Check it is actually a disklabel we are looking at.
 237          */
 238         if (nlp->d_magic != DISKMAGIC32 || nlp->d_magic2 != DISKMAGIC32 ||
 239             dkcksum32(nlp) != 0)
 240                 return (EINVAL);
 241
 242         /*
 243          * For each partition that we think is open, check the new disklabel
 244          * for compatibility.  Ignore special partitions (>= 128).
 245          */
 246         i = 0;
 247         while (i < 128) {
 248                 if (openmask[i >> 5] == 0) {
 249                         i += 32;
 250                         continue;
 251                 }
 252                 if ((openmask[i >> 5] & (1 << (i & 31))) == 0) {
 253                         ++i;
 254                         continue;
 255                 }
 256                 if (nlp->d_npartitions <= i)
 257                         return (EBUSY);
 258                 opp = &olp->d_partitions[i];
 259                 npp = &nlp->d_partitions[i];
 260                 if (npp->p_offset != opp->p_offset || npp->p_size < opp->p_size)
 261                         return (EBUSY);
 262                 /*
 263                  * Copy internally-set partition information
 264                  * if new label doesn't include it.             XXX
 265                  * (If we are using it then we had better stay the same type)
 266                  * This is possibly dubious, as someone else noted (XXX)
 267                  */
 268                 if (npp->p_fstype == FS_UNUSED && opp->p_fstype != FS_UNUSED) {
 269                         npp->p_fstype = opp->p_fstype;
 270                         npp->p_fsize = opp->p_fsize;
 271                         npp->p_frag = opp->p_frag;
 272                         npp->p_cpg = opp->p_cpg;
 273                 }
 274                 ++i;
 275         }
 276         nlp->d_checksum = 0;
 277         nlp->d_checksum = dkcksum32(nlp);
 278         *olp = *nlp;
 279
 280         if (olp->d_partitions[RAW_PART].p_offset)
 281                 return (EXDEV);
 282         if (olp->d_secperunit > sp->ds_size)
 283                 return (ENOSPC);
 284         for (part = 0; part < olp->d_npartitions; ++part) {
 285                 if (olp->d_partitions[part].p_size > sp->ds_size)
 286                         return(ENOSPC);
 287         }
 288         return (0);
 289 }
 290
 291 /*
 292  * Write disk label back to device after modification.
 293  */
 294 static int
 295 l32_writedisklabel(cdev_t dev, struct diskslices *ssp, struct diskslice *sp,
 296                    disklabel_t lpx)
 297 {
 298         struct disklabel32 *lp;
 299         struct disklabel32 *dlp;
 300         struct buf *bp;
 301         const char *msg;
 302         int error = 0;
 303
 304         lp = lpx.lab32;
 305
 306         if (lp->d_partitions[RAW_PART].p_offset != 0)
 307                 return (EXDEV);                 /* not quite right */
 308
 309         bp = geteblk((int)lp->d_secsize);
 310         bp->b_bio1.bio_offset = (off_t)LABELSECTOR32 * lp->d_secsize;
 311         bp->b_bio1.bio_done = biodone_sync;
 312         bp->b_bio1.bio_flags |= BIO_SYNC;
 313         bp->b_bcount = lp->d_secsize;
 314
 315 #if 1
 316         /*
 317          * We read the label first to see if it's there,
 318          * in which case we will put ours at the same offset into the block..
 319          * (I think this is stupid [Julian])
 320          * Note that you can't write a label out over a corrupted label!
 321          * (also stupid.. how do you write the first one? by raw writes?)
 322          */
 323         bp->b_flags &= ~B_INVAL;
 324         bp->b_cmd = BUF_CMD_READ;
 325         KKASSERT(dkpart(dev) == WHOLE_SLICE_PART);
 326         dev_dstrategy(dev, &bp->b_bio1);
 327         error = biowait(&bp->b_bio1, "labrd");
 328         if (error)
 329                 goto done;
 330         for (dlp = (struct disklabel32 *)bp->b_data;
 331             dlp <= (struct disklabel32 *)
 332               ((char *)bp->b_data + lp->d_secsize - sizeof(*dlp));
 333             dlp = (struct disklabel32 *)((char *)dlp + sizeof(long))) {
 334                 if (dlp->d_magic == DISKMAGIC32 &&
 335                     dlp->d_magic2 == DISKMAGIC32 && dkcksum32(dlp) == 0) {
 336                         *dlp = *lp;
 337                         lpx.lab32 = dlp;
 338                         msg = l32_fixlabel(NULL, sp, lpx, TRUE);
 339                         if (msg) {
 340                                 error = EINVAL;
 341                         } else {
 342                                 bp->b_cmd = BUF_CMD_WRITE;
 343                                 bp->b_bio1.bio_done = biodone_sync;
 344                                 bp->b_bio1.bio_flags |= BIO_SYNC;
 345                                 KKASSERT(dkpart(dev) == WHOLE_SLICE_PART);
 346                                 dev_dstrategy(dev, &bp->b_bio1);
 347                                 error = biowait(&bp->b_bio1, "labwr");
 348                         }
 349                         goto done;
 350                 }
 351         }
 352         error = ESRCH;
 353 done:
 354 #else
 355         bzero(bp->b_data, lp->d_secsize);
 356         dlp = (struct disklabel32 *)bp->b_data;
 357         *dlp = *lp;
 358         bp->b_flags &= ~B_INVAL;
 359         bp->b_cmd = BUF_CMD_WRITE;
 360         bp->b_bio1.bio_done = biodone_sync;
 361         bp->b_bio1.bio_flags |= BIO_SYNC;
 362         BUF_STRATEGY(bp, 1);
 363         error = biowait(&bp->b_bio1, "labwr");
 364 #endif
 365         bp->b_flags |= B_INVAL | B_AGE;
 366         brelse(bp);
 367         return (error);
 368 }
 369
 370 /*
 371  * Create a disklabel based on a disk_info structure, initializing
 372  * the appropriate fields and creating a raw partition that covers the
 373  * whole disk.
 374  *
 375  * If a diskslice is passed, the label is truncated to the slice
 376  */
 377 static disklabel_t
 378 l32_clone_label(struct disk_info *info, struct diskslice *sp)
 379 {
 380         struct disklabel32 *lp;
 381         disklabel_t res;
 382
 383         lp = kmalloc(sizeof *lp, M_DEVBUF, M_WAITOK | M_ZERO);
 384         lp->d_nsectors = info->d_secpertrack;
 385         lp->d_ntracks = info->d_nheads;
 386         lp->d_secpercyl = info->d_secpercyl;
 387         lp->d_secsize = info->d_media_blksize;
 388
 389         if (sp)
 390                 lp->d_secperunit = (u_int)sp->ds_size;
 391         else
 392                 lp->d_secperunit = (u_int)info->d_media_blocks;
 393
 394         if (lp->d_typename[0] == '\0')
 395                 strncpy(lp->d_typename, "amnesiac", sizeof(lp->d_typename));
 396         if (lp->d_packname[0] == '\0')
 397                 strncpy(lp->d_packname, "fictitious", sizeof(lp->d_packname));
 398         if (lp->d_nsectors == 0)
 399                 lp->d_nsectors = 32;
 400         if (lp->d_ntracks == 0)
 401                 lp->d_ntracks = 64;
 402         lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks;
 403         lp->d_ncylinders = lp->d_secperunit / lp->d_secpercyl;
 404         if (lp->d_rpm == 0)
 405                 lp->d_rpm = 3600;
 406         if (lp->d_interleave == 0)
 407                 lp->d_interleave = 1;
 408         if (lp->d_npartitions < RAW_PART + 1)
 409                 lp->d_npartitions = MAXPARTITIONS32;
 410         if (lp->d_bbsize == 0)
 411                 lp->d_bbsize = BBSIZE;
 412         if (lp->d_sbsize == 0)
 413                 lp->d_sbsize = SBSIZE;
 414
 415         /*
 416          * Used by various devices to create a compatibility slice which
 417          * allows us to mount root from devices which do not have a
 418          * disklabel.  Particularly: CDs.
 419          */
 420         lp->d_partitions[RAW_PART].p_size = lp->d_secperunit;
 421         if (info->d_dsflags & DSO_COMPATPARTA) {
 422                 lp->d_partitions[0].p_size = lp->d_secperunit;
 423                 lp->d_partitions[0].p_fstype = FS_OTHER;
 424         }
 425         lp->d_magic = DISKMAGIC32;
 426         lp->d_magic2 = DISKMAGIC32;
 427         lp->d_checksum = dkcksum32(lp);
 428         res.lab32 = lp;
 429         return (res);
 430 }
 431
 432 static void
 433 l32_makevirginlabel(disklabel_t lpx, struct diskslices *ssp,
 434                     struct diskslice *sp, struct disk_info *info)
 435 {
 436         struct disklabel32 *lp = lpx.lab32;
 437         struct partition32 *pp;
 438         disklabel_t template;
 439
 440         template = l32_clone_label(info, NULL);
 441         bcopy(template.opaque, lp, sizeof(struct disklabel32));
 442
 443         lp->d_magic = DISKMAGIC32;
 444         lp->d_magic2 = DISKMAGIC32;
 445
 446         lp->d_npartitions = MAXPARTITIONS32;
 447         if (lp->d_interleave == 0)
 448                 lp->d_interleave = 1;
 449         if (lp->d_rpm == 0)
 450                 lp->d_rpm = 3600;
 451         if (lp->d_nsectors == 0)        /* sectors per track */
 452                 lp->d_nsectors = 32;
 453         if (lp->d_ntracks == 0)         /* heads */
 454                 lp->d_ntracks = 64;
 455         lp->d_ncylinders = 0;
 456         lp->d_bbsize = BBSIZE;
 457         lp->d_sbsize = SBSIZE;
 458
 459         /*
 460          * If the slice or GPT partition is really small we could
 461          * wind up with an absurd calculation for ncylinders.
 462          */
 463         while (lp->d_ncylinders < 4) {
 464                 if (lp->d_ntracks > 1)
 465                         lp->d_ntracks >>= 1;
 466                 else if (lp->d_nsectors > 1)
 467                         lp->d_nsectors >>= 1;
 468                 else
 469                         break;
 470                 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks;
 471                 lp->d_ncylinders = sp->ds_size / lp->d_secpercyl;
 472         }
 473
 474         /*
 475          * Set or Modify the partition sizes to accomodate the slice,
 476          * since we started with a copy of the virgin label stored
 477          * in the whole-disk-slice and we are probably not a
 478          * whole-disk slice.
 479          */
 480         lp->d_secperunit = sp->ds_size;
 481         pp = &lp->d_partitions[RAW_PART];
 482         pp->p_offset = 0;
 483         pp->p_size = lp->d_secperunit;
 484         if (info->d_dsflags & DSO_COMPATPARTA) {
 485                 pp = &lp->d_partitions[0];
 486                 pp->p_offset = 0;
 487                 pp->p_size = lp->d_secperunit;
 488                 pp->p_fstype = FS_OTHER;
 489         }
 490         lp->d_checksum = 0;
 491         lp->d_checksum = dkcksum32(lp);
 492
 493         kfree(template.opaque, M_DEVBUF);
 494 }
 495
 496 static const char *
 497 l32_fixlabel(const char *sname, struct diskslice *sp,
 498              disklabel_t lpx, int writeflag)
 499 {
 500         struct disklabel32 *lp;
 501         struct partition32 *pp;
 502         u_int64_t start;
 503         u_int64_t end;
 504         u_int64_t offset;
 505         int part;
 506         int warned;
 507
 508         lp = lpx.lab32;
 509
 510         /* These errors "can't happen" so don't bother reporting details. */
 511         if (lp->d_magic != DISKMAGIC32 || lp->d_magic2 != DISKMAGIC32)
 512                 return ("fixlabel: invalid magic");
 513         if (dkcksum32(lp) != 0)
 514                 return ("fixlabel: invalid checksum");
 515
 516         pp = &lp->d_partitions[RAW_PART];
 517
 518         /*
 519          * What a mess.  For ages old backwards compatibility the disklabel
 520          * on-disk stores absolute offsets instead of slice-relative offsets.
 521          * So fix it up when reading, writing, or snooping.
 522          *
 523          * The in-core label is always slice-relative.
 524          */
 525         if (writeflag) {
 526                 start = 0;
 527                 offset = sp->ds_offset;
 528         } else {
 529                 start = sp->ds_offset;
 530                 offset = -sp->ds_offset;
 531         }
 532         if (pp->p_offset != start) {
 533                 if (sname != NULL) {
 534                         kprintf(
 535 "%s: rejecting BSD label: raw partition offset != slice offset\n",
 536                                sname);
 537                         slice_info(sname, sp);
 538                         partition_info(sname, RAW_PART, pp);
 539                 }
 540                 return ("fixlabel: raw partition offset != slice offset");
 541         }
 542         if (pp->p_size != sp->ds_size) {
 543                 if (sname != NULL) {
 544                         kprintf("%s: raw partition size != slice size\n", sname);
 545                         slice_info(sname, sp);
 546                         partition_info(sname, RAW_PART, pp);
 547                 }
 548                 if (pp->p_size > sp->ds_size) {
 549                         if (sname == NULL)
 550                                 return ("fixlabel: raw partition size > slice size");
 551                         kprintf("%s: truncating raw partition\n", sname);
 552                         pp->p_size = sp->ds_size;
 553                 }
 554         }
 555         end = start + sp->ds_size;
 556         if (start > end)
 557                 return ("fixlabel: slice wraps");
 558         if (lp->d_secpercyl <= 0)
 559                 return ("fixlabel: d_secpercyl <= 0");
 560         pp -= RAW_PART;
 561         warned = FALSE;
 562         for (part = 0; part < lp->d_npartitions; part++, pp++) {
 563                 if (pp->p_offset != 0 || pp->p_size != 0) {
 564                         if (pp->p_offset < start
 565                             || pp->p_offset + pp->p_size > end
 566                             || pp->p_offset + pp->p_size < pp->p_offset) {
 567                                 if (sname != NULL) {
 568                                         kprintf(
 569 "%s: rejecting partition in BSD label: it isn't entirely within the slice\n",
 570                                                sname);
 571                                         if (!warned) {
 572                                                 slice_info(sname, sp);
 573                                                 warned = TRUE;
 574                                         }
 575                                         partition_info(sname, part, pp);
 576                                 }
 577                                 /* XXX else silently discard junk. */
 578                                 bzero(pp, sizeof *pp);
 579                         } else {
 580                                 pp->p_offset += offset;
 581                         }
 582                 }
 583         }
 584         lp->d_ncylinders = sp->ds_size / lp->d_secpercyl;
 585         lp->d_secperunit = sp->ds_size;
 586         lp->d_checksum = 0;
 587         lp->d_checksum = dkcksum32(lp);
 588         return (NULL);
 589 }
 590
 591 /*
 592  * Set the number of blocks at the beginning of the slice which have
 593  * been reserved for label operations.  This area will be write-protected
 594  * when accessed via the slice.
 595  */
 596 static void
 597 l32_adjust_label_reserved(struct diskslices *ssp, int slice,
 598                           struct diskslice *sp)
 599 {
 600         /*struct disklabel32 *lp = sp->ds_label.lab32;*/
 601         sp->ds_reserved = SBSIZE / ssp->dss_secsize;
 602 }
 603
 604 static void
 605 partition_info(const char *sname, int part, struct partition32 *pp)
 606 {
 607         kprintf("%s%c: start %lu, end %lu, size %lu\n", sname, 'a' + part,
 608                 (u_long)pp->p_offset, (u_long)(pp->p_offset + pp->p_size - 1),
 609                 (u_long)pp->p_size);
 610 }
 611
 612 static void
 613 slice_info(const char *sname, struct diskslice *sp)
 614 {
 615         kprintf("%s: start %llu, end %llu, size %llu\n", sname,
 616                (long long)sp->ds_offset,
 617                (long long)sp->ds_offset + sp->ds_size - 1,
 618                (long long)sp->ds_size);
 619 }
 620
 621 struct disklabel_ops disklabel32_ops = {
 622         .labelsize = sizeof(struct disklabel32),
 623         .op_readdisklabel = l32_readdisklabel,
 624         .op_setdisklabel = l32_setdisklabel,
 625         .op_writedisklabel = l32_writedisklabel,
 626         .op_clone_label = l32_clone_label,
 627         .op_adjust_label_reserved = l32_adjust_label_reserved,
 628         .op_getpartbounds = l32_getpartbounds,
 629         .op_loadpartinfo = l32_loadpartinfo,
 630         .op_getnumparts = l32_getnumparts,
 631         .op_makevirginlabel = l32_makevirginlabel
 632 };
 633