int check_dos_label(struct fdisk_context *cxt)
{
int i;
if (!valid_part_table_flag(cxt->mbr))
return 0;
dos_init(cxt);
for (i = 0; i < 4; i++) {
struct pte *pe = &ptes[i];
if (IS_EXTENDED (pe->part_table->sys_ind)) {
if (partitions != 4)
fprintf(stderr, _("Ignoring extra extended "
"partition %d\n"), i + 1);
else
read_extended(cxt, i);
}
}
for (i = 3; i < partitions; i++) {
struct pte *pe = &ptes[i];
if (!valid_part_table_flag(pe->sectorbuffer)) {
fprintf(stderr,
_("Warning: invalid flag 0x%04x of partition "
"table %d will be corrected by w(rite)\n"),
part_table_flag(pe->sectorbuffer), i + 1);
pe->changed = 1;
}
}
return 1;
}
/*
* Attempt to interpret ASR metadata from a block device. This function
* returns either NULL (not an ASR) or a pointer to a descriptor struct.
* Note that the struct should be fully converted to the correct endianness
* by the time this function returns.
*
* WARNING: If you take disks out of an ASR HostRAID array and plug them in
* to a normal SCSI controller, the array will still show up! Even if you
* scribble over the disks! I assume that the a320raid binary driver only
* does its HostRAID magic if your controller is in RAID mode... but dmraid
* lacks this sort of visibility as to where its block devices come from.
* This is EXTREMELY DANGEROUS if you aren't careful!
*/
static void *
read_metadata_areas(struct lib_context *lc, struct dev_info *di,
size_t * sz, uint64_t * offset, union read_info *info)
{
size_t size = ASR_DISK_BLOCK_SIZE;
uint64_t asr_sboffset = ASR_CONFIGOFFSET;
struct asr *asr;
struct asr_raid_configline *cl;
/*
* Read the ASR reserved block on each disk. This is the very
* last sector of the disk, and we're really only interested in
* the two magic numbers, the version, and the pointer to the
* RAID table. Everything else appears to be unused in v8.
*/
if (!(asr = alloc_private(lc, handler, sizeof(*asr))))
goto bad0;
if (!(asr->rt = alloc_private(lc, handler, sizeof(*asr->rt))))
goto bad1;
if (!read_file(lc, handler, di->path, &asr->rb, size, asr_sboffset))
goto bad2;
/*
* Convert metadata and read in
*/
to_cpu(asr, ASR_BLOCK);
/* Check Signature and read optional extended metadata. */
if (!is_asr(lc, di, asr) || !read_extended(lc, di, asr))
goto bad2;
/*
* Now that we made sure that we have all the metadata, we exit.
*/
cl = this_disk(asr);
if (cl->raidstate == LSU_COMPONENT_STATE_FAILED)
goto bad2;
goto out;
bad2:
dbg_free(asr->rt);
bad1:
asr->rt = NULL;
dbg_free(asr);
bad0:
asr = NULL;
out:
return asr;
}
