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