static int
g_sunlabel_modify(struct g_geom *gp, struct g_sunlabel_softc *ms, u_char *sec0)
{
int i, error;
u_int u, v, csize;
struct sun_disklabel sl;
MD5_CTX md5sum;
error = sunlabel_dec(sec0, &sl);
if (error)
return (error);
csize = sl.sl_ntracks * sl.sl_nsectors;
for (i = 0; i < SUN_NPART; i++) {
v = sl.sl_part[i].sdkp_cyloffset;
u = sl.sl_part[i].sdkp_nsectors;
error = g_slice_config(gp, i, G_SLICE_CONFIG_CHECK,
((off_t)v * csize) << 9ULL,
((off_t)u) << 9ULL,
ms->sectorsize,
"%s%c", gp->name, 'a' + i);
if (error)
return (error);
}
for (i = 0; i < SUN_NPART; i++) {
v = sl.sl_part[i].sdkp_cyloffset;
u = sl.sl_part[i].sdkp_nsectors;
g_slice_config(gp, i, G_SLICE_CONFIG_SET,
((off_t)v * csize) << 9ULL,
((off_t)u) << 9ULL,
ms->sectorsize,
"%s%c", gp->name, 'a' + i);
}
ms->nalt = sl.sl_acylinders;
ms->nheads = sl.sl_ntracks;
ms->nsects = sl.sl_nsectors;
/*
* Calculate MD5 from the first sector and use it for avoiding
* recursive labels creation.
*/
MD5Init(&md5sum);
MD5Update(&md5sum, sec0, ms->sectorsize);
MD5Final(ms->labelsum, &md5sum);
return (0);
}
static void
read_label(struct sun_disklabel *sl, const char *disk)
{
char path[MAXPATHLEN];
uint32_t fwsectors;
uint32_t fwheads;
char buf[SUN_SIZE];
int fd, error;
snprintf(path, sizeof(path), "%s%s", _PATH_DEV, disk);
if ((fd = open(path, O_RDONLY)) < 0)
err(1, "open %s", path);
if (read(fd, buf, sizeof(buf)) != sizeof(buf))
err(1, "read");
error = sunlabel_dec(buf, sl);
if (ioctl(fd, DIOCGMEDIASIZE, &mediasize) != 0)
if (error)
err(1, "%s: ioctl(DIOCGMEDIASIZE) failed", disk);
if (ioctl(fd, DIOCGSECTORSIZE, §orsize) != 0) {
if (error)
err(1, "%s: DIOCGSECTORSIZE failed", disk);
else
sectorsize = 512;
}
if (error) {
bzero(sl, sizeof(*sl));
if (ioctl(fd, DIOCGFWSECTORS, &fwsectors) != 0)
fwsectors = 63;
if (ioctl(fd, DIOCGFWHEADS, &fwheads) != 0) {
if (mediasize <= 63 * 1024 * sectorsize)
fwheads = 1;
else if (mediasize <= 63 * 16 * 1024 * sectorsize)
fwheads = 16;
else
fwheads = 255;
}
sl->sl_rpm = 3600;
sl->sl_pcylinders = mediasize / (fwsectors * fwheads *
sectorsize);
sl->sl_sparespercyl = 0;
sl->sl_interleave = 1;
sl->sl_ncylinders = sl->sl_pcylinders - 2;
sl->sl_acylinders = 2;
sl->sl_nsectors = fwsectors;
sl->sl_ntracks = fwheads;
sl->sl_part[SUN_RAWPART].sdkp_cyloffset = 0;
sl->sl_part[SUN_RAWPART].sdkp_nsectors = sl->sl_ncylinders *
sl->sl_ntracks * sl->sl_nsectors;
if (mediasize > (off_t)4999L * 1024L * 1024L) {
sprintf(sl->sl_text,
"FreeBSD%jdG cyl %u alt %u hd %u sec %u",
(intmax_t)(mediasize + 512 * 1024 * 1024) /
(1024 * 1024 * 1024),
sl->sl_ncylinders, sl->sl_acylinders,
sl->sl_ntracks, sl->sl_nsectors);
} else {
sprintf(sl->sl_text,
"FreeBSD%jdM cyl %u alt %u hd %u sec %u",
(intmax_t)(mediasize + 512 * 1024) / (1024 * 1024),
sl->sl_ncylinders, sl->sl_acylinders,
sl->sl_ntracks, sl->sl_nsectors);
}
}
close(fd);
}