// _ParsePrimary
status_t
PartitionMapParser::_ParsePrimary(const partition_table* table,
bool& hadToReFitSize)
{
if (table == NULL)
return B_BAD_VALUE;
// check the signature
if (table->signature != kPartitionTableSectorSignature) {
TRACE(("intel: _ParsePrimary(): invalid PartitionTable signature: %lx\n",
(uint32)table->signature));
return B_BAD_DATA;
}
hadToReFitSize = false;
// examine the table
for (int32 i = 0; i < 4; i++) {
const partition_descriptor* descriptor = &table->table[i];
PrimaryPartition* partition = fMap->PrimaryPartitionAt(i);
partition->SetTo(descriptor, 0, fBlockSize);
// work-around potential BIOS/OS problems
hadToReFitSize |= partition->FitSizeToSession(fSessionSize);
// ignore, if location is bad
if (!partition->CheckLocation(fSessionSize)) {
TRACE(("intel: _ParsePrimary(): partition %ld: bad location, "
"ignoring\n", i));
partition->Unset();
}
}
// allocate a partition_table buffer
fPartitionTable = new(nothrow) partition_table;
if (fPartitionTable == NULL)
return B_NO_MEMORY;
// parse extended partitions
status_t error = B_OK;
for (int32 i = 0; error == B_OK && i < 4; i++) {
PrimaryPartition* primary = fMap->PrimaryPartitionAt(i);
if (primary->IsExtended())
error = _ParseExtended(primary, primary->Offset());
}
// cleanup
delete fPartitionTable;
fPartitionTable = NULL;
return error;
}
void
LogicalPartition::GetPartitionDescriptor(partition_descriptor* descriptor,
bool inner) const
{
PrimaryPartition* primary = GetPrimaryPartition();
if (inner) {
descriptor->start = (PartitionTableOffset() - primary->Offset())
/ BlockSize();
descriptor->type = primary->Type();
} else {
descriptor->start = (Offset() - PartitionTableOffset()) / BlockSize();
descriptor->type = Type();
}
descriptor->size = Size() / BlockSize();
descriptor->active = 0x00;
descriptor->begin.Unset();
descriptor->end.Unset();
}
status_t
PartitionMapHandle::GetPartitioningInfo(BPartitioningInfo* info)
{
// init to the full size (minus the first sector)
off_t size = Partition()->ContentSize();
status_t error = info->SetTo(Partition()->BlockSize(),
size - Partition()->BlockSize());
if (error != B_OK)
return error;
// exclude the space of the existing partitions
for (int32 i = 0; i < 4; i++) {
PrimaryPartition* primary = fPartitionMap.PrimaryPartitionAt(i);
if (!primary->IsEmpty()) {
error = info->ExcludeOccupiedSpace(primary->Offset(),
primary->Size());
if (error != B_OK)
return error;
}
}
return B_OK;
}
// pm_scan_partition
static status_t
pm_scan_partition(int fd, partition_data* partition, void* cookie)
{
// check parameters
if (fd < 0 || !partition || !cookie)
return B_ERROR;
TRACE(("intel: pm_scan_partition(%d, %ld: %lld, %lld, %ld)\n", fd,
partition->id, partition->offset, partition->size,
partition->block_size));
PartitionMapCookie* map = (PartitionMapCookie*)cookie;
// fill in the partition_data structure
partition->status = B_PARTITION_VALID;
partition->flags |= B_PARTITION_PARTITIONING_SYSTEM;
partition->content_size = partition->size;
// (no content_name and content_parameters)
// (content_type is set by the system)
partition->content_cookie = map;
// children
status_t error = B_OK;
int32 index = 0;
for (int32 i = 0; i < 4; i++) {
PrimaryPartition* primary = map->PrimaryPartitionAt(i);
if (!primary->IsEmpty()) {
partition_data* child = create_child_partition(partition->id,
index, partition->offset + primary->Offset(), primary->Size(),
-1);
index++;
if (!child) {
// something went wrong
error = B_ERROR;
break;
}
child->block_size = partition->block_size;
// (no name)
char type[B_FILE_NAME_LENGTH];
primary->GetTypeString(type);
child->type = strdup(type);
// parameters
char buffer[128];
sprintf(buffer, "type = %u ; active = %d", primary->Type(),
primary->Active());
child->parameters = strdup(buffer);
child->cookie = primary;
// check for allocation problems
if (!child->type || !child->parameters) {
error = B_NO_MEMORY;
break;
}
}
}
// keep map on success or cleanup on error
if (error == B_OK) {
atomic_add(&map->ref_count, 1);
} else {
partition->content_cookie = NULL;
for (int32 i = 0; i < partition->child_count; i++) {
if (partition_data* child = get_child_partition(partition->id, i))
child->cookie = NULL;
}
}
return error;
}