Kernel: Start making device numbers unique for each device

kernel/include/kernel/Device/DeviceNumbers.h

@@ -0,0 +1,24 @@
+#pragma once
+
+#include <sys/types.h>
+
+namespace Kernel
+{
+
+	enum class DeviceNumber : dev_t
+	{
+		Framebuffer = 1,
+		TTY,
+		Serial,
+		Null,
+		Zero,
+		Debug,
+		Input,
+		SCSI,
+		NVMeController,
+		NVMeNamespace,
+		Ethernet,
+		TmpFS,
+	};
+
+}

kernel/include/kernel/FS/DevFS/FileSystem.h

@@ -19,7 +19,6 @@ namespace Kernel
 		void add_device(BAN::RefPtr<Device>);
 		void add_inode(BAN::StringView path, BAN::RefPtr<TmpInode>);
 
-		dev_t get_next_dev() const;
 		int get_next_input_device() const;
 
 		void initiate_sync(bool should_block);

kernel/include/kernel/FS/Ext2/FileSystem.h

@@ -49,6 +49,8 @@ namespace Kernel
 
 		virtual BAN::RefPtr<Inode> root_inode() override { return m_root_inode; }
 
+		virtual dev_t dev() const override { return m_block_device->rdev(); };
+
 	private:
 		Ext2FS(BAN::RefPtr<BlockDevice> block_device)
 			: m_block_device(block_device)

kernel/include/kernel/FS/FileSystem.h

@@ -10,6 +10,8 @@ namespace Kernel
 	public:
 		virtual ~FileSystem() {}
 		virtual BAN::RefPtr<Inode> root_inode() = 0;
+
+		virtual dev_t dev() const = 0;
 	};
 
 }

kernel/include/kernel/FS/TmpFS/FileSystem.h

@@ -46,6 +46,8 @@ namespace Kernel
 
 		virtual BAN::RefPtr<Inode> root_inode() override { return m_root_inode; }
 
+		virtual dev_t dev() const override { return m_rdev; }
+
 		BAN::ErrorOr<BAN::RefPtr<TmpInode>> open_inode(ino_t ino);
 
 		BAN::ErrorOr<void> add_to_cache(BAN::RefPtr<TmpInode>);
@@ -115,6 +117,8 @@ namespace Kernel
 		paddr_t find_indirect(PageInfo root, size_t index, size_t depth);
 
 	private:
+		const dev_t m_rdev;
+
 		RecursiveSpinLock m_lock;
 
 		BAN::HashMap<ino_t, BAN::RefPtr<TmpInode>> m_inode_cache;

kernel/include/kernel/FS/TmpFS/Inode.h

@@ -35,8 +35,8 @@ namespace Kernel
 		virtual timespec	ctime()		const override { return m_inode_info.ctime; }
 		virtual blksize_t	blksize()	const override { return PAGE_SIZE; }
 		virtual blkcnt_t	blocks()	const override { return m_inode_info.blocks; }
-		virtual dev_t		dev()		const override { return 0; } // TODO
-		virtual dev_t		rdev()		const override { return 0; } // TODO
+		virtual dev_t		dev()		const override;
+		virtual dev_t		rdev()		const override { return 0; }
 
 	public:
 		static BAN::ErrorOr<BAN::RefPtr<TmpInode>> create_from_existing(TmpFileSystem&, ino_t, const TmpInodeInfo&);

kernel/include/kernel/FS/VirtualFileSystem.h

@@ -17,6 +17,9 @@ namespace Kernel
 
 		virtual BAN::RefPtr<Inode> root_inode() override { return m_root_fs->root_inode(); }
 
+		// FIXME:
+		virtual dev_t dev() const override { return 0; }
+
 		BAN::ErrorOr<void> mount(const Credentials&, BAN::StringView, BAN::StringView);
 		BAN::ErrorOr<void> mount(const Credentials&, FileSystem*, BAN::StringView);
 

kernel/include/kernel/Input/PS2/Device.h

@@ -9,7 +9,6 @@ namespace Kernel::Input
 	class PS2Device : public CharacterDevice, public Interruptable
 	{
 	public:
-		PS2Device(PS2Controller&);
 		virtual ~PS2Device() {}
 
 		virtual void send_initialize() = 0;
@@ -27,9 +26,12 @@ namespace Kernel::Input
 
 		virtual void update() final override { m_controller.update_command_queue(); }
 
+	protected:
+		PS2Device(PS2Controller&);
+
 	private:
-		const BAN::String m_name;
 		const dev_t m_rdev;
+		const BAN::String m_name;
 		PS2Controller& m_controller;
 	};