start work on fat

kernel/CMakeLists.txt

@@ -32,6 +32,7 @@ set(KERNEL_SOURCES
 	kernel/FS/DevFS/FileSystem.cpp
 	kernel/FS/Ext2/FileSystem.cpp
 	kernel/FS/Ext2/Inode.cpp
+	kernel/FS/FAT/FileSystem.cpp
 	kernel/FS/FileSystem.cpp
 	kernel/FS/Inode.cpp
 	kernel/FS/Pipe.cpp

kernel/include/kernel/FS/FAT/FileSystem.h

@@ -0,0 +1,32 @@
+#pragma once
+
+#include <kernel/FS/FileSystem.h>
+
+namespace Kernel
+{
+
+	class FATFS final : public FileSystem
+	{
+	public:
+		static BAN::ErrorOr<bool> probe(BAN::RefPtr<BlockDevice>);
+		static BAN::ErrorOr<BAN::RefPtr<FATFS>> create(BAN::RefPtr<BlockDevice>);
+
+		virtual BAN::RefPtr<Inode> root_inode() override { return m_root_inode; }
+
+		virtual dev_t dev() const override { return m_block_device->rdev(); };
+
+	private:
+		FATFS(BAN::RefPtr<BlockDevice> block_device)
+			: m_block_device(block_device)
+		{}
+
+	private:
+		Mutex m_mutex;
+
+		BAN::RefPtr<BlockDevice> m_block_device;
+		BAN::RefPtr<Inode> m_root_inode;
+
+		friend class BAN::RefPtr<FATFS>;
+	};
+
+}

kernel/kernel/FS/FAT/FileSystem.cpp

@@ -0,0 +1,16 @@
+#include <kernel/FS/FAT/FileSystem.h>
+
+namespace Kernel
+{
+
+	BAN::ErrorOr<bool> FATFS::probe(BAN::RefPtr<BlockDevice> block_device)
+	{
+
+	}
+
+	BAN::ErrorOr<BAN::RefPtr<FATFS>> FATFS::create(BAN::RefPtr<BlockDevice> block_device)
+	{
+
+	}
+
+}

kernel/kernel/FS/FileSystem.cpp

@@ -1,4 +1,5 @@
 #include <kernel/FS/Ext2/FileSystem.h>
+#include <kernel/FS/FAT/FileSystem.h>
 #include <kernel/FS/FileSystem.h>
 
 namespace Kernel
@@ -8,6 +9,8 @@ namespace Kernel
     {
         if (auto res = Ext2FS::probe(block_device); !res.is_error() && res.value())
             return BAN::RefPtr<FileSystem>(TRY(Ext2FS::create(block_device)));
+        if (auto res = FATFS::probe(block_device); !res.is_error() && res.value())
+            return BAN::RefPtr<FileSystem>(TRY(FATFS::create(block_device)));
         dprintln("Unsupported filesystem");
         return BAN::Error::from_errno(ENOTSUP);
     }

script/image-create.sh

@@ -57,7 +57,8 @@ if [ ! -b $PARTITION1 ] || [ ! -b $PARTITION2 ]; then
 fi
 
 # create root filesystem
-sudo mkfs.ext2 -q $PARTITION2
+sudo mkfs.fat -F 32 $PARTITION2
+#sudo mkfs.ext2 -q $PARTITION2
 
 # delete loop device
 sudo losetup -d $LOOP_DEV