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