Function load_root_filesystem

kernel/kernel/FS/VirtualFileSystem.cpp:83–165

	}

	static BAN::RefPtr<FileSystem> load_root_filesystem(BAN::StringView root_path)
	{
		if (root_path.empty())
			return load_fallback_root_filesystem();

		enum class RootType
		{
			PartitionUUID,
			BlockDeviceName,
		};

		BAN::StringView entry;
		RootType type;

		if (root_path.starts_with("PARTUUID="_sv))
		{
			entry = root_path.substring(9);
			if (entry.size() != 36)
			{
				derrorln("Invalid UUID '{}'", entry);
				return load_fallback_root_filesystem();
			}
			type = RootType::PartitionUUID;
		}
		else if (root_path.starts_with("/dev/"_sv))
		{
			entry = root_path.substring(5);
			if (entry.empty() || entry.contains('/'))
			{
				derrorln("Invalid root path '{}'", root_path);
				return load_fallback_root_filesystem();
			}
			type = RootType::BlockDeviceName;
		}
		else
		{
			derrorln("Unsupported root path format '{}'", root_path);
			return load_fallback_root_filesystem();
		}

		constexpr size_t timeout_ms = 10'000;
		constexpr size_t sleep_ms = 500;

		for (size_t i = 0; i < timeout_ms / sleep_ms; i++)
		{
			BAN::ErrorOr<BAN::RefPtr<BlockDevice>> ret = BAN::Error::from_errno(EINVAL);

			switch (type)
			{
				case RootType::PartitionUUID:
					ret = find_partition_by_uuid(entry);
					break;
				case RootType::BlockDeviceName:
					ret = find_block_device_by_name(entry);
					break;
			}

			if (!ret.is_error())