static int pi_dos_next_mbr(struct part_iter *iter, uint32_t *lba,
struct disk_dos_part_entry **_dp)
{
struct disk_dos_part_entry *dp;
while (++iter->index0 < 4) {
dp = ((struct disk_dos_mbr *)iter->data)->table + iter->index0;
if (notsane_primary(iter)) {
iter->status = PI_INSANE;
goto bail;
}
if (ost_is_ext(dp->ostype)) {
if (iter->sub.dos.bebr_index0 >= 0) {
error("You have more than 1 extended partition.\n");
iter->status = PI_INSANE;
goto bail;
}
/* record base EBR index */
iter->sub.dos.bebr_index0 = iter->index0;
}
if (!ost_is_nondata(dp->ostype) || iter->stepall) {
*lba = dp->start_lba;
*_dp = dp;
break;
}
}
return 0;
bail:
return -1;
}
static int dos_next_mbr(struct part_iter *iter, uint32_t *lba,
struct disk_dos_part_entry **_dp)
{
struct disk_dos_part_entry *dp;
while (++iter->index0 < 4) {
dp = ((struct disk_dos_mbr *)iter->data)->table + iter->index0;
if (notsane_primary(iter)) {
iter->status = PI_INSANE;
return -1;
}
if (ost_is_ext(dp->ostype)) {
if (iter->dos.bebr_index0 >= 0) {
error("More than 1 extended partition.");
iter->status = PI_INSANE;
return -1;
}
/* record base EBR index */
iter->dos.bebr_index0 = iter->index0;
}
if (!ost_is_nondata(dp->ostype) || (iter->flags & PIF_STEPALL)) {
*lba = dp->start_lba;
*_dp = dp;
break;
}
}
return 0;
}
static int notsane_extended(const struct part_iter *iter)
{
const struct disk_dos_part_entry *dp;
uint32_t end_ebr;
dp = ((struct disk_dos_mbr *)iter->data)->table;
if (!dp[1].ostype)
return 0;
if (!ost_is_nondata(dp[1].ostype)) {
error("2nd EBR entry must be extended or empty.\n");
return -1;
}
end_ebr = dp[1].start_lba + dp[1].length;
if (!dp[1].start_lba ||
!dp[1].length ||
!sane(dp[1].start_lba, dp[1].length) ||
end_ebr > iter->sub.dos.bebr_size) {
error("Insane extended partition.\n");
return -1;
}
return 0;
}
static int notsane_extended(const struct part_iter *iter)
{
const struct disk_dos_part_entry *dp;
uint32_t end_ebr;
dp = ((struct disk_dos_mbr *)iter->data)->table;
if (!dp[1].ostype)
return 0;
if (!ost_is_nondata(dp[1].ostype)) {
error("The 2nd EBR entry must be extended or empty.");
return -1;
}
if (iter->flags & PIF_RELAX)
return 0;
end_ebr = dp[1].start_lba + dp[1].length;
if (!dp[1].start_lba ||
!dp[1].length ||
!sane(dp[1].start_lba, dp[1].length) ||
end_ebr > iter->dos.bebr_siz) {
error("Extended partition (EBR) with invalid offset and/or length.");
return -1;
}
return 0;
}
