mirror of
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653681fb30
Glanced by: jhb
297 lines
5.8 KiB
C
297 lines
5.8 KiB
C
/*
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* ----------------------------------------------------------------------------
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* "THE BEER-WARE LICENSE" (Revision 42):
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* <phk@FreeBSD.org> wrote this file. As long as you retain this notice you
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* can do whatever you want with this stuff. If we meet some day, and you think
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* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
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* ----------------------------------------------------------------------------
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/stdint.h>
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#include <sys/disklabel.h>
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#ifdef PC98
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#include <sys/diskpc98.h>
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#else
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#include <sys/diskmbr.h>
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include "libdisk.h"
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int
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Track_Aligned(const struct disk *d, daddr_t offset)
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{
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#ifndef __ia64__
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if (!d->bios_sect)
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return 1;
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if (offset % d->bios_sect)
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return 0;
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#endif /* __ia64__ */
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return 1;
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}
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daddr_t
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Prev_Track_Aligned(const struct disk *d, daddr_t offset)
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{
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#ifndef __ia64__
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if (!d->bios_sect)
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return offset;
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return (offset / d->bios_sect) * d->bios_sect;
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#else
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return 1;
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#endif
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}
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daddr_t
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Next_Track_Aligned(const struct disk *d, daddr_t offset)
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{
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#ifndef __ia64__
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if (!d->bios_sect)
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return offset;
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return Prev_Track_Aligned(d, offset + d->bios_sect-1);
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#else
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return 1;
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#endif
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}
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static int
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Cyl_Aligned(const struct disk *d, daddr_t offset)
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{
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#ifndef __ia64__
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if (!d->bios_sect || !d->bios_hd)
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return 1;
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if (offset % (d->bios_sect * d->bios_hd))
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return 0;
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#endif
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return 1;
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}
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daddr_t
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Prev_Cyl_Aligned(const struct disk *d, daddr_t offset)
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{
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#ifndef __ia64__
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if (!d->bios_sect || !d->bios_hd)
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return offset;
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return (offset / (d->bios_sect * d->bios_hd)) * d->bios_sect *
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d->bios_hd;
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#else
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return 1;
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#endif
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}
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daddr_t
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Next_Cyl_Aligned(const struct disk *d, daddr_t offset)
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{
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#ifndef __ia64__
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if (!d->bios_sect || !d->bios_hd)
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return offset;
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return Prev_Cyl_Aligned(d,offset + (d->bios_sect * d->bios_hd) - 1);
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#else
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return 1;
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#endif
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}
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/*
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* Rule#0:
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* Chunks of type 'whole' can have max NDOSPART children.
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* Only one of them can have the "active" flag
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*/
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static void
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Rule_000(__unused const struct disk *d, const struct chunk *c, char *msg)
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{
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#ifdef PC98
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int i = 0;
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#else
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int i = 0, j = 0;
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#endif
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struct chunk *c1;
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if (c->type != whole)
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return;
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for (c1 = c->part; c1; c1 = c1->next) {
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if (c1->type != unused)
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continue;
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#ifndef PC98
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if (c1->flags & CHUNK_ACTIVE)
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j++;
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#endif
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i++;
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}
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if (i > NDOSPART)
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sprintf(msg + strlen(msg),
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"%d is too many children of the 'whole' chunk."
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" Max is %d\n", i, NDOSPART);
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#ifndef PC98
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if (j > 1)
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sprintf(msg + strlen(msg),
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"Too many active children of 'whole'");
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#endif
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}
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/*
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* Rule#1:
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* All children of 'whole' and 'extended' must be track-aligned.
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* Exception: the end can be unaligned if it matches the end of 'whole'
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*/
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static void
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Rule_001(const struct disk *d, const struct chunk *c, char *msg)
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{
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struct chunk *c1;
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if (c->type != whole && c->type != extended)
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return;
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for (c1 = c->part; c1; c1 = c1->next) {
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if (c1->type == unused)
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continue;
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c1->flags |= CHUNK_ALIGN;
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#ifdef PC98
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if (!Cyl_Aligned(d, c1->offset))
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#else
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if (!Track_Aligned(d, c1->offset))
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#endif
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sprintf(msg + strlen(msg),
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#ifdef PC98
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"chunk '%s' [%jd..%jd] does not start"
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" on a cylinder boundary\n",
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#else
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"chunk '%s' [%jd..%jd] does not start"
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" on a track boundary\n",
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#endif
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c1->name, (intmax_t)c1->offset, (intmax_t)c1->end);
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if ((c->type == whole || c->end == c1->end)
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|| Cyl_Aligned(d, c1->end + 1))
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;
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else
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sprintf(msg + strlen(msg),
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"chunk '%s' [%jd..%jd] does not end"
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" on a cylinder boundary\n",
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c1->name, (intmax_t)c1->offset, (intmax_t)c1->end);
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}
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}
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/*
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* Rule#2:
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* Max one 'fat' as child of 'whole'
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*/
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static void
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Rule_002(__unused const struct disk *d, const struct chunk *c, char *msg)
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{
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int i;
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struct chunk *c1;
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if (c->type != whole)
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return;
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for (i = 0, c1 = c->part; c1; c1 = c1->next) {
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if (c1->type != fat)
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continue;
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i++;
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}
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if (i > 1) {
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sprintf(msg + strlen(msg),
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"Max one 'fat' allowed as child of 'whole'\n");
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}
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}
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/*
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* Rule#3:
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* Max one extended as child of 'whole'
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*/
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static void
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Rule_003(__unused const struct disk *d, const struct chunk *c, char *msg)
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{
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int i;
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struct chunk *c1;
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if (c->type != whole)
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return;
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for (i = 0, c1 = c->part; c1; c1 = c1->next) {
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if (c1->type != extended)
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continue;
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i++;
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}
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if (i > 1) {
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sprintf(msg + strlen(msg),
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"Max one 'extended' allowed as child of 'whole'\n");
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}
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}
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/*
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* Rule#4:
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* Max seven 'part' as children of 'freebsd'
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* Max one CHUNK_IS_ROOT child per 'freebsd'
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*/
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static void
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Rule_004(__unused const struct disk *d, const struct chunk *c, char *msg)
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{
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int i = 0, k = 0;
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struct chunk *c1;
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if (c->type != freebsd)
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return;
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for (c1 = c->part; c1; c1 = c1->next) {
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if (c1->type != part)
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continue;
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if (c1->flags & CHUNK_IS_ROOT)
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k++;
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i++;
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}
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if (i > 7) {
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sprintf(msg + strlen(msg),
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"Max seven partitions per freebsd slice\n");
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}
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if (k > 1) {
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sprintf(msg + strlen(msg),
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"Max one root partition child per freebsd slice\n");
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}
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}
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static void
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Check_Chunk(const struct disk *d, const struct chunk *c, char *msg)
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{
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switch (platform) {
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case p_i386:
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case p_amd64:
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Rule_000(d, c, msg);
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Rule_001(d, c, msg);
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Rule_002(d, c, msg);
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Rule_003(d, c, msg);
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Rule_004(d, c, msg);
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if (c->part)
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Check_Chunk(d, c->part, msg);
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if (c->next)
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Check_Chunk(d, c->next, msg);
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break;
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case p_pc98:
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Rule_000(d, c, msg);
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Rule_001(d, c, msg);
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Rule_004(d, c, msg);
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if (c->part)
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Check_Chunk(d, c->part, msg);
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if (c->next)
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Check_Chunk(d, c->next, msg);
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break;
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default:
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break;
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}
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}
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char *
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CheckRules(const struct disk *d)
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{
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char msg[BUFSIZ];
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*msg = '\0';
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Check_Chunk(d, d->chunks, msg);
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if (*msg)
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return strdup(msg);
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return 0;
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}
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