2 * Copyright (c) 1994 Bruce D. Evans.
5 * Copyright (c) 1990 The Regents of the University of California.
8 * This code is derived from software contributed to Berkeley by
11 * Copyright (c) 1982, 1986, 1988 Regents of the University of California.
12 * All rights reserved.
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution.
22 * 3. All advertising materials mentioning features or use of this software
23 * must display the following acknowledgement:
24 * This product includes software developed by the University of
25 * California, Berkeley and its contributors.
26 * 4. Neither the name of the University nor the names of its contributors
27 * may be used to endorse or promote products derived from this software
28 * without specific prior written permission.
30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42 * from: @(#)wd.c 7.2 (Berkeley) 5/9/91
43 * from: wd.c,v 1.55 1994/10/22 01:57:12 phk Exp $
44 * from: @(#)ufs_disksubr.c 7.16 (Berkeley) 5/4/91
45 * from: ufs_disksubr.c,v 1.8 1994/06/07 01:21:39 phk Exp $
46 * $FreeBSD: src/sys/kern/subr_diskslice.c,v 1.82.2.6 2001/07/24 09:49:41 dd Exp $
47 * $DragonFly: src/sys/kern/subr_diskslice.c,v 1.8 2004/06/02 17:18:43 dillon Exp $
50 #include <sys/param.h>
51 #include <sys/systm.h>
54 #include <sys/disklabel.h>
55 #include <sys/diskslice.h>
56 #include <sys/diskmbr.h>
57 #include <sys/fcntl.h>
58 #include <sys/malloc.h>
60 #include <sys/syslog.h>
61 #include <sys/vnode.h>
62 #include <sys/device.h>
64 #include <vfs/ufs/fs.h>
66 #define TRACE(str) do { if (ds_debug) printf str; } while (0)
68 typedef u_char bool_t;
70 static volatile bool_t ds_debug;
72 static struct disklabel *clone_label (struct disklabel *lp);
73 static void dsiodone (struct buf *bp);
74 static char *fixlabel (char *sname, struct diskslice *sp,
75 struct disklabel *lp, int writeflag);
76 static void free_ds_label (struct diskslices *ssp, int slice);
77 static void partition_info (char *sname, int part, struct partition *pp);
78 static void slice_info (char *sname, struct diskslice *sp);
79 static void set_ds_label (struct diskslices *ssp, int slice,
80 struct disklabel *lp);
81 static void set_ds_wlabel (struct diskslices *ssp, int slice, int wlabel);
84 * Duplicate a label for the whole disk, and initialize defaults in the
85 * copy for fields that are not already initialized. The caller only
86 * needs to initialize d_secsize and d_secperunit, and zero the fields
87 * that are to be defaulted.
89 static struct disklabel *
90 clone_label(struct disklabel *lp)
92 struct disklabel *lp1;
94 lp1 = malloc(sizeof *lp1, M_DEVBUF, M_WAITOK);
97 if (lp1->d_typename[0] == '\0')
98 strncpy(lp1->d_typename, "amnesiac", sizeof(lp1->d_typename));
99 if (lp1->d_packname[0] == '\0')
100 strncpy(lp1->d_packname, "fictitious", sizeof(lp1->d_packname));
101 if (lp1->d_nsectors == 0)
102 lp1->d_nsectors = 32;
103 if (lp1->d_ntracks == 0)
105 lp1->d_secpercyl = lp1->d_nsectors * lp1->d_ntracks;
106 lp1->d_ncylinders = lp1->d_secperunit / lp1->d_secpercyl;
109 if (lp1->d_interleave == 0)
110 lp1->d_interleave = 1;
111 if (lp1->d_npartitions < RAW_PART + 1)
112 lp1->d_npartitions = MAXPARTITIONS;
113 if (lp1->d_bbsize == 0)
114 lp1->d_bbsize = BBSIZE;
115 if (lp1->d_sbsize == 0)
116 lp1->d_sbsize = SBSIZE;
117 lp1->d_partitions[RAW_PART].p_size = lp1->d_secperunit;
118 lp1->d_magic = DISKMAGIC;
119 lp1->d_magic2 = DISKMAGIC;
120 lp1->d_checksum = dkcksum(lp1);
125 * Determine the size of the transfer, and make sure it is
126 * within the boundaries of the partition. Adjust transfer
127 * if needed, and signal errors or early completion.
130 * o Split buffers that are too big for the device.
131 * o Check for overflow.
132 * o Finish cleaning this up.
135 dscheck(struct buf *bp, struct diskslices *ssp)
140 struct disklabel *lp;
143 struct partition *pp;
145 daddr_t slicerel_secno;
146 struct diskslice *sp;
151 printf("dscheck(%s): negative b_blkno %ld\n",
152 devtoname(bp->b_dev), (long)blkno);
153 bp->b_error = EINVAL;
156 sp = &ssp->dss_slices[dkslice(bp->b_dev)];
158 if (ssp->dss_secmult == 1) {
159 if (bp->b_bcount % (u_long)DEV_BSIZE)
162 nsec = bp->b_bcount >> DEV_BSHIFT;
163 } else if (ssp->dss_secshift != -1) {
164 if (bp->b_bcount & (ssp->dss_secsize - 1))
166 if (blkno & (ssp->dss_secmult - 1))
168 secno = blkno >> ssp->dss_secshift;
169 nsec = bp->b_bcount >> (DEV_BSHIFT + ssp->dss_secshift);
171 if (bp->b_bcount % ssp->dss_secsize)
173 if (blkno % ssp->dss_secmult)
175 secno = blkno / ssp->dss_secmult;
176 nsec = bp->b_bcount / ssp->dss_secsize;
179 labelsect = -LABELSECTOR - 1;
180 endsecno = sp->ds_size;
181 slicerel_secno = secno;
183 labelsect = lp->d_partitions[LABEL_PART].p_offset;
185 Debugger("labelsect != 0 in dscheck()");
186 pp = &lp->d_partitions[dkpart(bp->b_dev)];
187 endsecno = pp->p_size;
188 slicerel_secno = pp->p_offset + secno;
191 /* overwriting disk label ? */
192 /* XXX should also protect bootstrap in first 8K */
193 if (slicerel_secno <= LABELSECTOR + labelsect &&
195 slicerel_secno + nsec > LABELSECTOR + labelsect &&
197 (bp->b_flags & B_READ) == 0 && sp->ds_wlabel == 0) {
202 #if defined(DOSBBSECTOR) && defined(notyet)
203 /* overwriting master boot record? */
204 if (slicerel_secno <= DOSBBSECTOR && (bp->b_flags & B_READ) == 0 &&
205 sp->ds_wlabel == 0) {
211 /* beyond partition? */
212 if (secno + nsec > endsecno) {
213 /* if exactly at end of disk, return an EOF */
214 if (secno == endsecno) {
215 bp->b_resid = bp->b_bcount;
218 /* or truncate if part of it fits */
219 nsec = endsecno - secno;
221 bp->b_error = EINVAL;
224 bp->b_bcount = nsec * ssp->dss_secsize;
227 bp->b_pblkno = sp->ds_offset + slicerel_secno;
230 * Snoop on label accesses if the slice offset is nonzero. Fudge
231 * offsets in the label to keep the in-core label coherent with
234 if (slicerel_secno <= LABELSECTOR + labelsect
236 && slicerel_secno + nsec > LABELSECTOR + labelsect
238 && sp->ds_offset != 0) {
239 struct iodone_chain *ic;
241 ic = malloc(sizeof *ic , M_DEVBUF, M_WAITOK);
242 ic->ic_prev_flags = bp->b_flags;
243 ic->ic_prev_iodone = bp->b_iodone;
244 ic->ic_prev_iodone_chain = bp->b_iodone_chain;
245 ic->ic_args[0].ia_long = (LABELSECTOR + labelsect -
246 slicerel_secno) * ssp->dss_secsize;
247 ic->ic_args[1].ia_ptr = sp;
248 bp->b_flags |= B_CALL;
249 bp->b_iodone = dsiodone;
250 bp->b_iodone_chain = ic;
251 if (!(bp->b_flags & B_READ)) {
253 * XXX even disklabel(8) writes directly so we need
254 * to adjust writes. Perhaps we should drop support
255 * for DIOCWLABEL (always write protect labels) and
256 * require the use of DIOCWDINFO.
258 * XXX probably need to copy the data to avoid even
259 * temporarily corrupting the in-core copy.
261 if (bp->b_vp != NULL) {
263 bp->b_vp->v_numoutput++;
266 /* XXX need name here. */
267 msg = fixlabel((char *)NULL, sp,
269 (bp->b_data + ic->ic_args[0].ia_long),
272 printf("dscheck(%s): %s\n",
273 devtoname(bp->b_dev), msg);
283 "dscheck(%s): b_bcount %ld is not on a sector boundary (ssize %d)\n",
284 devtoname(bp->b_dev), bp->b_bcount, ssp->dss_secsize);
285 bp->b_error = EINVAL;
290 "dscheck(%s): b_blkno %ld is not on a sector boundary (ssize %d)\n",
291 devtoname(bp->b_dev), (long)blkno, ssp->dss_secsize);
292 bp->b_error = EINVAL;
296 bp->b_resid = bp->b_bcount;
297 bp->b_flags |= B_ERROR;
302 dsclose(dev_t dev, int mode, struct diskslices *ssp)
305 struct diskslice *sp;
307 sp = &ssp->dss_slices[dkslice(dev)];
308 mask = 1 << dkpart(dev);
309 sp->ds_openmask &= ~mask;
313 dsgone(struct diskslices **sspp)
316 struct diskslice *sp;
317 struct diskslices *ssp;
319 for (slice = 0, ssp = *sspp; slice < ssp->dss_nslices; slice++) {
320 sp = &ssp->dss_slices[slice];
321 free_ds_label(ssp, slice);
328 * For the "write" commands (DIOCSDINFO and DIOCWDINFO), this
329 * is subject to the same restriction as dsopen().
332 dsioctl(dev_t dev, u_long cmd, caddr_t data,
333 int flags, struct diskslices **sspp)
336 struct disklabel *lp;
341 struct diskslice *sp;
342 struct diskslices *ssp;
343 struct partition *pp;
345 slice = dkslice(dev);
347 sp = &ssp->dss_slices[slice];
352 lp = (struct disklabel *)data;
353 if (ssp->dss_slices[WHOLE_DISK_SLICE].ds_label) {
354 *lp = *ssp->dss_slices[WHOLE_DISK_SLICE].ds_label;
356 bzero(lp, sizeof(struct disklabel));
359 lp->d_magic = DISKMAGIC;
360 lp->d_magic2 = DISKMAGIC;
361 pp = &lp->d_partitions[RAW_PART];
363 pp->p_size = sp->ds_size;
365 lp->d_npartitions = MAXPARTITIONS;
366 if (lp->d_interleave == 0)
367 lp->d_interleave = 1;
370 if (lp->d_nsectors == 0)
372 if (lp->d_ntracks == 0)
375 lp->d_bbsize = BBSIZE;
376 lp->d_sbsize = SBSIZE;
377 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks;
378 lp->d_ncylinders = sp->ds_size / lp->d_secpercyl;
379 lp->d_secperunit = sp->ds_size;
381 lp->d_checksum = dkcksum(lp);
387 *(struct disklabel *)data = *lp;
394 *(struct disklabel **)data = lp;
401 ((struct partinfo *)data)->disklab = lp;
402 ((struct partinfo *)data)->part
403 = &lp->d_partitions[dkpart(dev)];
407 bcopy(ssp, data, (char *)&ssp->dss_slices[ssp->dss_nslices] -
412 if (slice == WHOLE_DISK_SLICE)
414 if (!(flags & FWRITE))
416 lp = malloc(sizeof *lp, M_DEVBUF, M_WAITOK);
417 if (sp->ds_label == NULL)
418 bzero(lp, sizeof *lp);
420 bcopy(sp->ds_label, lp, sizeof *lp);
421 if (sp->ds_label == NULL)
424 openmask = sp->ds_openmask;
425 if (slice == COMPATIBILITY_SLICE)
426 openmask |= ssp->dss_slices[
427 ssp->dss_first_bsd_slice].ds_openmask;
428 else if (slice == ssp->dss_first_bsd_slice)
429 openmask |= ssp->dss_slices[
430 COMPATIBILITY_SLICE].ds_openmask;
432 error = setdisklabel(lp, (struct disklabel *)data,
434 /* XXX why doesn't setdisklabel() check this? */
435 if (error == 0 && lp->d_partitions[RAW_PART].p_offset != 0)
438 if (lp->d_secperunit > sp->ds_size)
440 for (part = 0; part < lp->d_npartitions; part++)
441 if (lp->d_partitions[part].p_size > sp->ds_size)
448 free_ds_label(ssp, slice);
449 set_ds_label(ssp, slice, lp);
452 case DIOCSYNCSLICEINFO:
453 if (slice != WHOLE_DISK_SLICE || dkpart(dev) != RAW_PART)
456 for (slice = 0; slice < ssp->dss_nslices; slice++) {
457 openmask = ssp->dss_slices[slice].ds_openmask;
459 && (slice != WHOLE_DISK_SLICE
460 || openmask & ~(1 << RAW_PART)))
465 * Temporarily forget the current slices struct and read
467 * XXX should wait for current accesses on this disk to
468 * complete, then lock out future accesses and opens.
471 lp = malloc(sizeof *lp, M_DEVBUF, M_WAITOK);
472 *lp = *ssp->dss_slices[WHOLE_DISK_SLICE].ds_label;
473 error = dsopen(dev, S_IFCHR, ssp->dss_oflags, sspp, lp);
481 * Reopen everything. This is a no-op except in the "force"
482 * case and when the raw bdev and cdev are both open. Abort
485 for (slice = 0; slice < ssp->dss_nslices; slice++) {
486 for (openmask = ssp->dss_slices[slice].ds_openmask,
487 part = 0; openmask; openmask >>= 1, part++) {
490 error = dsopen(dkmodslice(dkmodpart(dev, part),
492 S_IFCHR, ssp->dss_oflags, sspp,
507 error = dsioctl(dev, DIOCSDINFO, data, flags, &ssp);
511 * XXX this used to hack on dk_openpart to fake opening
512 * partition 0 in case that is used instead of dkpart(dev).
514 old_wlabel = sp->ds_wlabel;
515 set_ds_wlabel(ssp, slice, TRUE);
516 error = writedisklabel(dev, sp->ds_label);
517 /* XXX should invalidate in-core label if write failed. */
518 set_ds_wlabel(ssp, slice, old_wlabel);
523 if (slice == WHOLE_DISK_SLICE)
526 if (!(flags & FWRITE))
528 set_ds_wlabel(ssp, slice, *(int *)data != 0);
537 dsiodone(struct buf *bp)
539 struct iodone_chain *ic;
542 ic = bp->b_iodone_chain;
543 bp->b_flags = (ic->ic_prev_flags & B_CALL)
544 | (bp->b_flags & ~(B_CALL | B_DONE));
545 bp->b_iodone = ic->ic_prev_iodone;
546 bp->b_iodone_chain = ic->ic_prev_iodone_chain;
547 if (!(bp->b_flags & B_READ)
548 || (!(bp->b_flags & B_ERROR) && bp->b_error == 0)) {
549 msg = fixlabel((char *)NULL, ic->ic_args[1].ia_ptr,
551 (bp->b_data + ic->ic_args[0].ia_long),
561 dsisopen(struct diskslices *ssp)
567 for (slice = 0; slice < ssp->dss_nslices; slice++) {
568 if (ssp->dss_slices[slice].ds_openmask)
575 * Allocate a slices "struct" and initialize it to contain only an empty
576 * compatibility slice (pointing to itself), a whole disk slice (covering
577 * the disk as described by the label), and (nslices - BASE_SLICES) empty
578 * slices beginning at BASE_SLICE.
581 dsmakeslicestruct(int nslices, struct disklabel *lp)
583 struct diskslice *sp;
584 struct diskslices *ssp;
586 ssp = malloc(offsetof(struct diskslices, dss_slices) +
587 nslices * sizeof *sp, M_DEVBUF, M_WAITOK);
588 ssp->dss_first_bsd_slice = COMPATIBILITY_SLICE;
589 ssp->dss_nslices = nslices;
591 ssp->dss_secmult = lp->d_secsize / DEV_BSIZE;
592 if (ssp->dss_secmult & (ssp->dss_secmult - 1))
593 ssp->dss_secshift = -1;
595 ssp->dss_secshift = ffs(ssp->dss_secmult) - 1;
596 ssp->dss_secsize = lp->d_secsize;
597 sp = &ssp->dss_slices[0];
598 bzero(sp, nslices * sizeof *sp);
599 sp[WHOLE_DISK_SLICE].ds_size = lp->d_secperunit;
604 dsname(dev_t dev, int unit, int slice, int part, char *partname)
606 static char name[32];
609 dname = dev_dname(dev);
610 if (strlen(dname) > 16)
611 dname = "nametoolong";
612 snprintf(name, sizeof(name), "%s%d", dname, unit);
614 if (slice != WHOLE_DISK_SLICE || part != RAW_PART) {
615 partname[0] = 'a' + part;
617 if (slice != COMPATIBILITY_SLICE) {
618 snprintf(name + strlen(name),
619 sizeof(name) - strlen(name), "s%d", slice - 1);
626 * This should only be called when the unit is inactive and the strategy
627 * routine should not allow it to become active unless we call it. Our
628 * strategy routine must be special to allow activity.
631 dsopen(dev_t dev, int mode, u_int flags,
632 struct diskslices **sspp, struct disklabel *lp)
636 struct disklabel *lp1;
644 struct diskslice *sp;
645 struct diskslices *ssp;
648 dev->si_bsize_phys = lp->d_secsize;
651 if (lp->d_secsize % DEV_BSIZE) {
652 printf("%s: invalid sector size %lu\n", devtoname(dev),
653 (u_long)lp->d_secsize);
658 * XXX reinitialize the slice table unless there is an open device
659 * on the unit. This should only be done if the media has changed.
662 need_init = !dsisopen(ssp);
663 if (ssp != NULL && need_init)
667 * Allocate a minimal slices "struct". This will become
668 * the final slices "struct" if we don't want real slices
669 * or if we can't find any real slices.
671 *sspp = dsmakeslicestruct(BASE_SLICE, lp);
673 if (!(flags & DSO_ONESLICE)) {
675 error = dsinit(dev, lp, sspp);
682 ssp->dss_oflags = flags;
685 * If there are no real slices, then make the compatiblity
686 * slice cover the whole disk.
688 if (ssp->dss_nslices == BASE_SLICE)
689 ssp->dss_slices[COMPATIBILITY_SLICE].ds_size
692 /* Point the compatibility slice at the BSD slice, if any. */
693 for (slice = BASE_SLICE; slice < ssp->dss_nslices; slice++) {
694 sp = &ssp->dss_slices[slice];
695 if (sp->ds_type == DOSPTYP_386BSD /* XXX */) {
696 ssp->dss_first_bsd_slice = slice;
697 ssp->dss_slices[COMPATIBILITY_SLICE].ds_offset
699 ssp->dss_slices[COMPATIBILITY_SLICE].ds_size
701 ssp->dss_slices[COMPATIBILITY_SLICE].ds_type
707 ssp->dss_slices[WHOLE_DISK_SLICE].ds_label = clone_label(lp);
708 ssp->dss_slices[WHOLE_DISK_SLICE].ds_wlabel = TRUE;
712 * Initialize secondary info for all slices. It is needed for more
713 * than the current slice in the DEVFS case. XXX DEVFS is no more.
715 for (slice = 0; slice < ssp->dss_nslices; slice++) {
716 sp = &ssp->dss_slices[slice];
717 if (sp->ds_label != NULL
719 && slice != WHOLE_DISK_SLICE
723 dev1 = dkmodslice(dkmodpart(dev, RAW_PART), slice);
724 sname = dsname(dev, unit, slice, RAW_PART, partname);
726 * XXX this should probably only be done for the need_init
727 * case, but there may be a problem with DIOCSYNCSLICEINFO.
729 set_ds_wlabel(ssp, slice, TRUE); /* XXX invert */
730 lp1 = clone_label(lp);
731 TRACE(("readdisklabel\n"));
732 if (flags & DSO_NOLABELS)
735 msg = readdisklabel(dev1, lp1);
738 * readdisklabel() returns NULL for success, and an
739 * error string for failure.
741 * If there isn't a label on the disk, and if the
742 * DSO_COMPATLABEL is set, we want to use the
743 * faked-up label provided by the caller.
745 * So we set msg to NULL to indicate that there is
746 * no failure (since we have a faked-up label),
747 * free lp1, and then clone it again from lp.
748 * (In case readdisklabel() modified lp1.)
750 if (msg != NULL && (flags & DSO_COMPATLABEL)) {
753 lp1 = clone_label(lp);
757 msg = fixlabel(sname, sp, lp1, FALSE);
758 if (msg == NULL && lp1->d_secsize != ssp->dss_secsize)
759 msg = "inconsistent sector size";
761 if (sp->ds_type == DOSPTYP_386BSD /* XXX */)
762 log(LOG_WARNING, "%s: cannot find label (%s)\n",
767 if (lp1->d_flags & D_BADSECT) {
768 log(LOG_ERR, "%s: bad sector table not supported\n",
773 set_ds_label(ssp, slice, lp1);
774 set_ds_wlabel(ssp, slice, FALSE);
777 slice = dkslice(dev);
778 if (slice >= ssp->dss_nslices)
780 sp = &ssp->dss_slices[slice];
783 && (sp->ds_label == NULL || part >= sp->ds_label->d_npartitions))
784 return (EINVAL); /* XXX needs translation */
786 sp->ds_openmask |= mask;
791 dssize(dev_t dev, struct diskslices **sspp)
793 struct disklabel *lp;
796 struct diskslices *ssp;
798 slice = dkslice(dev);
801 if (ssp == NULL || slice >= ssp->dss_nslices
802 || !(ssp->dss_slices[slice].ds_openmask & (1 << part))) {
803 if (dev_dopen(dev, FREAD, S_IFCHR, NULL) != 0)
805 dev_dclose(dev, FREAD, S_IFCHR, NULL);
808 lp = ssp->dss_slices[slice].ds_label;
811 return ((int)lp->d_partitions[part].p_size);
815 free_ds_label(struct diskslices *ssp, int slice)
817 struct disklabel *lp;
818 struct diskslice *sp;
820 sp = &ssp->dss_slices[slice];
825 set_ds_label(ssp, slice, (struct disklabel *)NULL);
829 fixlabel(char *sname, struct diskslice *sp, struct disklabel *lp, int writeflag)
834 struct partition *pp;
838 /* These errors "can't happen" so don't bother reporting details. */
839 if (lp->d_magic != DISKMAGIC || lp->d_magic2 != DISKMAGIC)
840 return ("fixlabel: invalid magic");
841 if (dkcksum(lp) != 0)
842 return ("fixlabel: invalid checksum");
844 pp = &lp->d_partitions[RAW_PART];
847 offset = sp->ds_offset;
849 start = sp->ds_offset;
850 offset = -sp->ds_offset;
852 if (pp->p_offset != start) {
855 "%s: rejecting BSD label: raw partition offset != slice offset\n",
857 slice_info(sname, sp);
858 partition_info(sname, RAW_PART, pp);
860 return ("fixlabel: raw partition offset != slice offset");
862 if (pp->p_size != sp->ds_size) {
864 printf("%s: raw partition size != slice size\n", sname);
865 slice_info(sname, sp);
866 partition_info(sname, RAW_PART, pp);
868 if (pp->p_size > sp->ds_size) {
870 return ("fixlabel: raw partition size > slice size");
871 printf("%s: truncating raw partition\n", sname);
872 pp->p_size = sp->ds_size;
875 end = start + sp->ds_size;
877 return ("fixlabel: slice wraps");
878 if (lp->d_secpercyl <= 0)
879 return ("fixlabel: d_secpercyl <= 0");
882 for (part = 0; part < lp->d_npartitions; part++, pp++) {
883 if (pp->p_offset != 0 || pp->p_size != 0) {
884 if (pp->p_offset < start
885 || pp->p_offset + pp->p_size > end
886 || pp->p_offset + pp->p_size < pp->p_offset) {
889 "%s: rejecting partition in BSD label: it isn't entirely within the slice\n",
892 slice_info(sname, sp);
895 partition_info(sname, part, pp);
897 /* XXX else silently discard junk. */
898 bzero(pp, sizeof *pp);
900 pp->p_offset += offset;
903 lp->d_ncylinders = sp->ds_size / lp->d_secpercyl;
904 lp->d_secperunit = sp->ds_size;
906 lp->d_checksum = dkcksum(lp);
911 partition_info(char *sname, int part, struct partition *pp)
913 printf("%s%c: start %lu, end %lu, size %lu\n", sname, 'a' + part,
914 (u_long)pp->p_offset, (u_long)(pp->p_offset + pp->p_size - 1),
919 slice_info(char *sname, struct diskslice *sp)
921 printf("%s: start %lu, end %lu, size %lu\n", sname,
922 sp->ds_offset, sp->ds_offset + sp->ds_size - 1, sp->ds_size);
926 set_ds_label(struct diskslices *ssp, int slice, struct disklabel *lp)
928 ssp->dss_slices[slice].ds_label = lp;
929 if (slice == COMPATIBILITY_SLICE)
930 ssp->dss_slices[ssp->dss_first_bsd_slice].ds_label = lp;
931 else if (slice == ssp->dss_first_bsd_slice)
932 ssp->dss_slices[COMPATIBILITY_SLICE].ds_label = lp;
936 set_ds_wlabel(struct diskslices *ssp, int slice, int wlabel)
938 ssp->dss_slices[slice].ds_wlabel = wlabel;
939 if (slice == COMPATIBILITY_SLICE)
940 ssp->dss_slices[ssp->dss_first_bsd_slice].ds_wlabel = wlabel;
941 else if (slice == ssp->dss_first_bsd_slice)
942 ssp->dss_slices[COMPATIBILITY_SLICE].ds_wlabel = wlabel;