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Implement the BSD scheme. This doesn't quite work as geom_part_bsd

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finds an invalid label. I'm not going to worry about that right now,
because there's more to worry about: the BSD disk label has the 'c'
partition for the entire disk and we don't handle this at all.
Note also that the BSD disk label wants a geometry, so this will
have to be revisited anyway once a good solution is in place.
This commit is contained in:
marcel 2014-03-23 19:22:13 +00:00
parent c9139def6c
commit 0c6234c0ae
1 changed files with 62 additions and 5 deletions
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67
bsd.c
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@ -29,13 +29,21 @@ __FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/disklabel.h>
#include <sys/endian.h>
#include <sys/errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "mkimg.h"
#include "scheme.h"
static struct mkimg_alias bsd_aliases[] = {
{ ALIAS_FREEBSD_NANDFS, ALIAS_INT2TYPE(FS_NANDFS) },
{ ALIAS_FREEBSD_SWAP, ALIAS_INT2TYPE(FS_SWAP) },
{ ALIAS_FREEBSD_UFS, ALIAS_INT2TYPE(FS_BSDFFS) },
{ ALIAS_FREEBSD_VINUM, ALIAS_INT2TYPE(FS_VINUM) },
{ ALIAS_FREEBSD_ZFS, ALIAS_INT2TYPE(FS_ZFS) },
{ ALIAS_NONE, 0 }
};
@ -44,14 +52,62 @@ bsd_metadata(u_int where)
{
u_int secs;
secs = (where == SCHEME_META_IMG_START) ? 16 : 0;
return (secs);
secs = BBSIZE / secsz;
return ((where == SCHEME_META_IMG_START) ? secs : 0);
}
static int
bsd_write(int fd __unused, lba_t imgsz __unused, void *bootcode __unused)
bsd_write(int fd, lba_t imgsz, void *bootcode)
{
return (ENOSYS);
u_char *buf, *p;
struct disklabel *d;
struct partition *dp;
struct part *part;
int error;
uint16_t checksum;
buf = malloc(BBSIZE);
if (buf == NULL)
return (ENOMEM);
if (bootcode != NULL) {
memcpy(buf, bootcode, BBSIZE);
memset(buf + LABELSECTOR * secsz, 0, secsz);
} else
memset(buf, 0, BBSIZE);
d = (void *)(buf + LABELSECTOR * secsz + LABELOFFSET);
le32enc(&d->d_magic, DISKMAGIC);
le32enc(&d->d_secsize, secsz);
le32enc(&d->d_nsectors, 1); /* XXX */
le32enc(&d->d_ntracks, 1); /* XXX */
le32enc(&d->d_ncylinders, 0); /* XXX */
le32enc(&d->d_secpercyl, 1); /* XXX */
le32enc(&d->d_secperunit, imgsz);
le16enc(&d->d_rpm, 3600);
le32enc(&d->d_magic2, DISKMAGIC);
le16enc(&d->d_npartitions, (8 > nparts) ? 8 : nparts);
le32enc(&d->d_bbsize, BBSIZE);
STAILQ_FOREACH(part, &partlist, link) {
dp = &d->d_partitions[part->index];
le32enc(&dp->p_size, part->size);
le32enc(&dp->p_offset, part->block);
dp->p_fstype = ALIAS_TYPE2INT(part->type);
}
dp = &d->d_partitions[nparts];
checksum = 0;
for (p = buf; p < (u_char *)dp; p += 2)
checksum ^= le16dec(p);
le16enc(&d->d_checksum, checksum);
error = mkimg_seek(fd, 0);
if (error == 0) {
if (write(fd, buf, BBSIZE) != BBSIZE)
error = errno;
}
free(buf);
return (error);
}
static struct mkimg_scheme bsd_scheme = {
@ -60,7 +116,8 @@ static struct mkimg_scheme bsd_scheme = {
.aliases = bsd_aliases,
.metadata = bsd_metadata,
.write = bsd_write,
.nparts = 20
.nparts = 20,
.bootcode = BBSIZE
};
SCHEME_DEFINE(bsd_scheme);