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/*
* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/UUID.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 StorageManagement* s_the;
static size_t s_device_minor_number;
UNMAP_AFTER_INIT StorageManagement::StorageManagement(String boot_argument, bool force_pio)
: m_boot_argument(boot_argument)
, m_controllers(enumerate_controllers(force_pio))
, m_storage_devices(enumerate_storage_devices())
, m_disk_partitions(enumerate_disk_partitions())
{
s_device_minor_number = 0;
if (!boot_argument_contains_partition_uuid()) {
determine_boot_device();
return;
}
determine_boot_device_with_partition_uuid();
}
bool StorageManagement::boot_argument_contains_partition_uuid()
{
return m_boot_argument.starts_with("PARTUUID=");
}
UNMAP_AFTER_INIT NonnullRefPtrVector<StorageController> StorageManagement::enumerate_controllers(bool force_pio) const
{
NonnullRefPtrVector<StorageController> controllers;
if (!kernel_command_line().disable_physical_storage()) {
if (kernel_command_line().is_ide_enabled()) {
PCI::enumerate([&](const PCI::Address& address, PCI::ID) {
if (PCI::get_class(address) == PCI_MASS_STORAGE_CLASS_ID && PCI::get_subclass(address) == PCI_IDE_CTRL_SUBCLASS_ID) {
controllers.append(IDEController::initialize(address, force_pio));
}
});
}
PCI::enumerate([&](const PCI::Address& address, PCI::ID) {
if (PCI::get_class(address) == PCI_MASS_STORAGE_CLASS_ID && PCI::get_subclass(address) == PCI_SATA_CTRL_SUBCLASS_ID && PCI::get_programming_interface(address) == PCI_AHCI_IF_PROGIF) {
controllers.append(AHCIController::initialize(address));
}
});
}
controllers.append(RamdiskController::initialize());
return controllers;
}
UNMAP_AFTER_INIT NonnullRefPtrVector<StorageDevice> StorageManagement::enumerate_storage_devices() const
{
VERIFY(!m_controllers.is_empty());
NonnullRefPtrVector<StorageDevice> devices;
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;
devices.append(device.release_nonnull());
}
}
return devices;
}
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 NonnullRefPtrVector<DiskPartition> 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++;
}
return partitions;
}
UNMAP_AFTER_INIT void StorageManagement::determine_boot_device()
{
VERIFY(!m_controllers.is_empty());
if (m_boot_argument.starts_with("/dev/")) {
StringView device_name = m_boot_argument.substring_view(5);
Device::for_each([&](Device& device) {
if (device.is_block_device()) {
auto& block_device = static_cast<BlockDevice&>(device);
if (device.device_name() == device_name) {
m_boot_block_device = block_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_disk_partitions.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& partition : m_disk_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;
}
int StorageManagement::major_number()
{
return 3;
}
int StorageManagement::minor_number()
{
return s_device_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 e2fs = Ext2FS::create(FileDescription::try_create(boot_device_description.release_nonnull()).value());
if (auto result = e2fs->initialize(); result.is_error()) {
PANIC("StorageManagement: Couldn't open root filesystem: {}", result);
}
return e2fs;
}
bool StorageManagement::initialized()
{
return (s_the != nullptr);
}
UNMAP_AFTER_INIT void StorageManagement::initialize(String root_device, bool force_pio)
{
VERIFY(!StorageManagement::initialized());
s_the = new StorageManagement(root_device, force_pio);
}
StorageManagement& StorageManagement::the()
{
return *s_the;
}
}
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