int fdisk_read_firstsector(struct fdisk_context *cxt)
{
ssize_t r;
int rc;
assert(cxt);
assert(cxt->sector_size);
rc = fdisk_init_firstsector_buffer(cxt);
if (rc)
return rc;
assert(cxt->sector_size == cxt->firstsector_bufsz);
DBG(CXT, ul_debugobj(cxt, "reading first sector "
"buffer [sector_size=%lu]", cxt->sector_size));
r = lseek(cxt->dev_fd, 0, SEEK_SET);
if (r == -1)
{
DBG(CXT, ul_debugobj(cxt, "failed to seek to first sector %m"));
return -errno;
}
r = read(cxt->dev_fd, cxt->firstsector, cxt->sector_size);
if (r != cxt->sector_size) {
if (!errno)
errno = EINVAL; /* probably too small file/device */
DBG(CXT, ul_debugobj(cxt, "failed to read first sector %m"));
return -errno;
}
return 0;
}
static int sun_create_disklabel(struct fdisk_context *cxt)
{
unsigned int ndiv;
struct fdisk_sun_label *sun; /* libfdisk sun handler */
struct sun_disklabel *sunlabel; /* on disk data */
int rc = 0;
assert(cxt);
assert(cxt->label);
assert(fdisk_is_label(cxt, SUN));
/* map first sector to header */
rc = fdisk_init_firstsector_buffer(cxt, 0, 0);
if (rc)
return rc;
sun = (struct fdisk_sun_label *) cxt->label;
sun->header = (struct sun_disklabel *) cxt->firstsector;
sunlabel = sun->header;
cxt->label->nparts_max = SUN_MAXPARTITIONS;
sunlabel->magic = cpu_to_be16(SUN_LABEL_MAGIC);
sunlabel->vtoc.version = cpu_to_be32(SUN_VTOC_VERSION);
sunlabel->vtoc.sanity = cpu_to_be32(SUN_VTOC_SANITY);
sunlabel->vtoc.nparts = cpu_to_be16(SUN_MAXPARTITIONS);
#ifdef HDIO_GETGEO
if (cxt->geom.heads && cxt->geom.sectors) {
fdisk_sector_t llsectors;
if (blkdev_get_sectors(cxt->dev_fd, (unsigned long long *) &llsectors) == 0) {
int sec_fac = cxt->sector_size / 512;
fdisk_sector_t llcyls;
llcyls = llsectors / (cxt->geom.heads * cxt->geom.sectors * sec_fac);
cxt->geom.cylinders = llcyls;
if (cxt->geom.cylinders != llcyls)
cxt->geom.cylinders = ~0;
} else {
fdisk_warnx(cxt,
_("BLKGETSIZE ioctl failed on %s. "
"Using geometry cylinder value of %llu. "
"This value may be truncated for devices "
"> 33.8 GB."),
cxt->dev_path, cxt->geom.cylinders);
}
} else
#endif
ask_geom(cxt);
sunlabel->acyl = cpu_to_be16(0);
sunlabel->pcyl = cpu_to_be16(cxt->geom.cylinders);
sunlabel->rpm = cpu_to_be16(5400);
sunlabel->intrlv = cpu_to_be16(1);
sunlabel->apc = cpu_to_be16(0);
sunlabel->nhead = cpu_to_be16(cxt->geom.heads);
sunlabel->nsect = cpu_to_be16(cxt->geom.sectors);
sunlabel->ncyl = cpu_to_be16(cxt->geom.cylinders);
snprintf((char *) sunlabel->label_id, sizeof(sunlabel->label_id),
"Linux cyl %ju alt %u hd %u sec %ju",
(uintmax_t) cxt->geom.cylinders,
be16_to_cpu(sunlabel->acyl),
cxt->geom.heads,
(uintmax_t) cxt->geom.sectors);
if (cxt->geom.cylinders * cxt->geom.heads * cxt->geom.sectors >= 150 * 2048) {
ndiv = cxt->geom.cylinders - (50 * 2048 / (cxt->geom.heads * cxt->geom.sectors)); /* 50M swap */
} else
ndiv = cxt->geom.cylinders * 2 / 3;
/* create the default layout only if no-script defined */
if (!cxt->script) {
set_partition(cxt, 0, 0, ndiv * cxt->geom.heads * cxt->geom.sectors,
SUN_TAG_LINUX_NATIVE);
set_partition(cxt, 1, ndiv * cxt->geom.heads * cxt->geom.sectors,
cxt->geom.cylinders * cxt->geom.heads * cxt->geom.sectors,
SUN_TAG_LINUX_SWAP);
sunlabel->vtoc.infos[1].flags |= cpu_to_be16(SUN_FLAG_UNMNT);
set_partition(cxt, 2, 0,
cxt->geom.cylinders * cxt->geom.heads * cxt->geom.sectors,
SUN_TAG_WHOLEDISK);
}
{
unsigned short *ush = (unsigned short *)sunlabel;
unsigned short csum = 0;
while(ush < (unsigned short *)(&sunlabel->csum))
csum ^= *ush++;
sunlabel->csum = csum;
}
fdisk_label_set_changed(cxt->label, 1);
cxt->label->nparts_cur = count_used_partitions(cxt);
fdisk_info(cxt, _("Created a new Sun disklabel."));
return 0;
}
static int sgi_create_disklabel(struct fdisk_context *cxt)
{
struct fdisk_sgi_label *sgi;
struct sgi_disklabel *sgilabel;
int rc;
assert(cxt);
assert(cxt->label);
assert(fdisk_is_disklabel(cxt, SGI));
#ifdef HDIO_GETGEO
if (cxt->geom.heads && cxt->geom.sectors) {
sector_t llsectors;
if (blkdev_get_sectors(cxt->dev_fd, &llsectors) == 0) {
/* the get device size ioctl was successful */
sector_t llcyls;
int sec_fac = cxt->sector_size / 512;
llcyls = llsectors / (cxt->geom.heads * cxt->geom.sectors * sec_fac);
cxt->geom.cylinders = llcyls;
if (cxt->geom.cylinders != llcyls) /* truncated? */
cxt->geom.cylinders = ~0;
} else {
/* otherwise print error and use truncated version */
fdisk_warnx(cxt,
_("BLKGETSIZE ioctl failed on %s. "
"Using geometry cylinder value of %llu. "
"This value may be truncated for devices "
"> 33.8 GB."), cxt->dev_path, cxt->geom.cylinders);
}
}
#endif
rc = fdisk_init_firstsector_buffer(cxt);
if (rc)
return rc;
sgi = (struct fdisk_sgi_label *) cxt->label;
sgi->header = (struct sgi_disklabel *) cxt->firstsector;
sgilabel = sgi->header;
sgilabel->magic = cpu_to_be32(SGI_LABEL_MAGIC);
sgilabel->root_part_num = cpu_to_be16(0);
sgilabel->swap_part_num = cpu_to_be16(1);
/* sizeof(sgilabel->boot_file) = 16 > 6 */
memset(sgilabel->boot_file, 0, 16);
strcpy((char *) sgilabel->boot_file, "/unix");
sgilabel->devparam.skew = (0);
sgilabel->devparam.gap1 = (0);
sgilabel->devparam.gap2 = (0);
sgilabel->devparam.sparecyl = (0);
sgilabel->devparam.pcylcount = cpu_to_be16(cxt->geom.cylinders);
sgilabel->devparam.head_vol0 = cpu_to_be16(0);
sgilabel->devparam.ntrks = cpu_to_be16(cxt->geom.heads);
/* tracks/cylinder (heads) */
sgilabel->devparam.cmd_tag_queue_depth = (0);
sgilabel->devparam.unused0 = (0);
sgilabel->devparam.unused1 = cpu_to_be16(0);
sgilabel->devparam.nsect = cpu_to_be16(cxt->geom.sectors);
/* sectors/track */
sgilabel->devparam.bytes = cpu_to_be16(cxt->sector_size);
sgilabel->devparam.ilfact = cpu_to_be16(1);
sgilabel->devparam.flags = cpu_to_be32(
SGI_DEVPARAM_TRACK_FWD
| SGI_DEVPARAM_IGNORE_ERRORS
| SGI_DEVPARAM_RESEEK);
sgilabel->devparam.datarate = cpu_to_be32(0);
sgilabel->devparam.retries_on_error = cpu_to_be32(1);
sgilabel->devparam.ms_per_word = cpu_to_be32(0);
sgilabel->devparam.xylogics_gap1 = cpu_to_be16(0);
sgilabel->devparam.xylogics_syncdelay = cpu_to_be16(0);
sgilabel->devparam.xylogics_readdelay = cpu_to_be16(0);
sgilabel->devparam.xylogics_gap2 = cpu_to_be16(0);
sgilabel->devparam.xylogics_readgate = cpu_to_be16(0);
sgilabel->devparam.xylogics_writecont = cpu_to_be16(0);
memset(&(sgilabel->volume), 0,
sizeof(struct sgi_volume) * SGI_MAXVOLUMES);
memset(&(sgilabel->partitions), 0,
sizeof(struct sgi_partition) * SGI_MAXPARTITIONS);
cxt->label->nparts_max = SGI_MAXPARTITIONS;
sgi_set_entire(cxt);
sgi_set_volhdr(cxt);
cxt->label->nparts_cur = count_used_partitions(cxt);
fdisk_sinfo(cxt, FDISK_INFO_SUCCESS,
_("Created a new SGI disklabel."));
return 0;
}
