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/*
* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Singleton.h>
#include <AK/UUID.h>
#include <Kernel/Bus/PCI/API.h>
#include <Kernel/Bus/PCI/Access.h>
#include <Kernel/CommandLine.h>
#include <Kernel/Devices/BlockDevice.h>
#include <Kernel/FileSystem/Ext2FileSystem.h>
#include <Kernel/Panic.h>
#include <Kernel/Storage/AHCIController.h>
#include <Kernel/Storage/IDEController.h>
#include <Kernel/Storage/Partition/EBRPartitionTable.h>
#include <Kernel/Storage/Partition/GUIDPartitionTable.h>
#include <Kernel/Storage/Partition/MBRPartitionTable.h>
#include <Kernel/Storage/RamdiskController.h>
#include <Kernel/Storage/StorageManagement.h>
namespace Kernel {
static Singleton<StorageManagement> s_the;
static Atomic<size_t> s_device_minor_number;
UNMAP_AFTER_INIT StorageManagement::StorageManagement()
{
}
void StorageManagement::remove_device(StorageDevice& device)
{
m_storage_devices.remove(device);
}
bool StorageManagement::boot_argument_contains_partition_uuid()
{
return m_boot_argument.starts_with("PARTUUID=");
}
UNMAP_AFTER_INIT void StorageManagement::enumerate_controllers(bool force_pio)
{
VERIFY(m_controllers.is_empty());
if (!kernel_command_line().disable_physical_storage()) {
if (kernel_command_line().is_ide_enabled()) {
PCI::enumerate([&](PCI::DeviceIdentifier const& device_identifier) {
if (device_identifier.class_code().value() == to_underlying(PCI::ClassID::MassStorage)
&& device_identifier.subclass_code().value() == to_underlying(PCI::MassStorage::SubclassID::IDEController)) {
m_controllers.append(IDEController::initialize(device_identifier, force_pio));
}
});
}
PCI::enumerate([&](PCI::DeviceIdentifier const& device_identifier) {
if (device_identifier.class_code().value() == to_underlying(PCI::ClassID::MassStorage)
&& device_identifier.subclass_code().value() == to_underlying(PCI::MassStorage::SubclassID::SATAController)
&& device_identifier.prog_if().value() == to_underlying(PCI::MassStorage::SATAProgIF::AHCI)) {
m_controllers.append(AHCIController::initialize(device_identifier));
}
});
}
m_controllers.append(RamdiskController::initialize());
}
UNMAP_AFTER_INIT void StorageManagement::enumerate_storage_devices()
{
VERIFY(!m_controllers.is_empty());
for (auto& controller : m_controllers) {
for (size_t device_index = 0; device_index < controller.devices_count(); device_index++) {
auto device = controller.device(device_index);
if (device.is_null())
continue;
m_storage_devices.append(device.release_nonnull());
}
}
}
UNMAP_AFTER_INIT OwnPtr<PartitionTable> StorageManagement::try_to_initialize_partition_table(const StorageDevice& device) const
{
auto mbr_table_or_result = MBRPartitionTable::try_to_initialize(device);
if (!mbr_table_or_result.is_error())
return move(mbr_table_or_result.value());
if (mbr_table_or_result.error() == PartitionTable::Error::MBRProtective) {
auto gpt_table_or_result = GUIDPartitionTable::try_to_initialize(device);
if (gpt_table_or_result.is_error())
return {};
return move(gpt_table_or_result.value());
}
if (mbr_table_or_result.error() == PartitionTable::Error::ConatinsEBR) {
auto ebr_table_or_result = EBRPartitionTable::try_to_initialize(device);
if (ebr_table_or_result.is_error())
return {};
return move(ebr_table_or_result.value());
}
return {};
}
UNMAP_AFTER_INIT void StorageManagement::enumerate_disk_partitions() const
{
VERIFY(!m_storage_devices.is_empty());
NonnullRefPtrVector<DiskPartition> partitions;
size_t device_index = 0;
for (auto& device : m_storage_devices) {
auto partition_table = try_to_initialize_partition_table(device);
if (!partition_table)
continue;
for (size_t partition_index = 0; partition_index < partition_table->partitions_count(); partition_index++) {
auto partition_metadata = partition_table->partition(partition_index);
if (!partition_metadata.has_value())
continue;
// FIXME: Try to not hardcode a maximum of 16 partitions per drive!
auto disk_partition = DiskPartition::create(const_cast<StorageDevice&>(device), (partition_index + (16 * device_index)), partition_metadata.value());
partitions.append(disk_partition);
const_cast<StorageDevice&>(device).m_partitions.append(disk_partition);
}
device_index++;
}
}
UNMAP_AFTER_INIT void StorageManagement::determine_boot_device()
{
VERIFY(!m_controllers.is_empty());
if (m_boot_argument.starts_with("/dev/")) {
StringView storage_name = m_boot_argument.substring_view(5);
for (auto& storage_device : m_storage_devices) {
if (storage_device.storage_name() == storage_name) {
m_boot_block_device = storage_device;
}
}
}
if (m_boot_block_device.is_null()) {
PANIC("StorageManagement: boot device {} not found", m_boot_argument);
}
}
UNMAP_AFTER_INIT void StorageManagement::determine_boot_device_with_partition_uuid()
{
VERIFY(!m_storage_devices.is_empty());
VERIFY(m_boot_argument.starts_with("PARTUUID="));
auto partition_uuid = UUID(m_boot_argument.substring_view(strlen("PARTUUID=")));
if (partition_uuid.to_string().length() != 36) {
PANIC("StorageManagement: Specified partition UUID is not valid");
}
for (auto& storage_device : m_storage_devices) {
for (auto& partition : storage_device.partitions()) {
if (partition.metadata().unique_guid().is_zero())
continue;
if (partition.metadata().unique_guid() == partition_uuid) {
m_boot_block_device = partition;
break;
}
}
}
}
RefPtr<BlockDevice> StorageManagement::boot_block_device() const
{
return m_boot_block_device.strong_ref();
}
int StorageManagement::major_number()
{
return 3;
}
int StorageManagement::minor_number()
{
auto minor_number = s_device_minor_number.load();
s_device_minor_number++;
return minor_number;
}
NonnullRefPtr<FileSystem> StorageManagement::root_filesystem() const
{
auto boot_device_description = boot_block_device();
if (!boot_device_description) {
PANIC("StorageManagement: Couldn't find a suitable device to boot from");
}
auto description_or_error = OpenFileDescription::try_create(boot_device_description.release_nonnull());
VERIFY(!description_or_error.is_error());
auto file_system = Ext2FS::try_create(description_or_error.release_value()).release_value();
if (auto result = file_system->initialize(); result.is_error()) {
PANIC("StorageManagement: Couldn't open root filesystem: {}", result);
}
return file_system;
}
UNMAP_AFTER_INIT void StorageManagement::initialize(String root_device, bool force_pio)
{
VERIFY(s_device_minor_number == 0);
m_boot_argument = root_device;
enumerate_controllers(force_pio);
enumerate_storage_devices();
enumerate_disk_partitions();
if (!boot_argument_contains_partition_uuid()) {
determine_boot_device();
return;
}
determine_boot_device_with_partition_uuid();
}
StorageManagement& StorageManagement::the()
{
return *s_the;
}
}
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