Merge branch 'mountpoints' of github.com:Alexis211/Melon into mountpoints

36 files changed, 969 insertions, 97 deletions

diff --git a/Source/Kernel/Core/Log.ns.cpp b/Source/Kernel/Core/Log.ns.cpp
index 1727024..c8ccd80 100644
--- a/Source/Kernel/Core/Log.ns.cpp
+++ b/Source/Kernel/Core/Log.ns.cpp
@@ -1,4 +1,5 @@
 #include "Log.ns.h"
+#include <FileSystems/RamFS/RamFS.class.h>
 #include <VFS/VFS.ns.h>
 
 namespace Log {
@@ -11,6 +12,10 @@ void init(u8int loglevel) {
 	if (VFS::find("/System/Logs") == 0) VFS::createDirectory("/System/Logs");
 
 	logs[KL_PANIC] = new TextFile("/System/Logs/Panic.log", FM_APPEND);
+	if (!logs[KL_PANIC]->valid()) {	//FS maybee not read/write, mount a ramfs
+		RamFS::mount(1024*1024, (DirectoryNode*)VFS::find("/System/Logs"));
+		logs[KL_PANIC] = new TextFile("/System/Logs/Panic.log", FM_APPEND);
+	}
 	if (KL_CRITICAL <= loglevel) logs[KL_CRITICAL] = new TextFile("/System/Logs/Critical.log", FM_APPEND);
 	if (KL_ERROR <= loglevel) logs[KL_ERROR] = new TextFile("/System/Logs/Error.log", FM_APPEND);
 	if (KL_WARNING <= loglevel) logs[KL_WARNING] = new TextFile("/System/Logs/Warning.log", FM_APPEND);
diff --git a/Source/Kernel/Core/Sys.ns.cpp b/Source/Kernel/Core/Sys.ns.cpp
index eeb92ee..49b2725 100644
--- a/Source/Kernel/Core/Sys.ns.cpp
+++ b/Source/Kernel/Core/Sys.ns.cpp
@@ -83,7 +83,7 @@ void dumpRegs(registers_t *regs, VirtualTerminal& vt) {
 
 void stackTrace(u32int ebp, VirtualTerminal& vt, u32int maxframes) {
 	u32int *stack = (u32int*)ebp;
-	for (u32int i = 0; i < maxframes and (u32int)stack > 0xC0000000; i++) {
+	for (u32int i = 0; i < maxframes and (u32int)stack > 0xC0000000 and (u32int)stack < (ebp + 0x10000); i++) {
 		vt << "Frame: " << (u32int)stack << " n:" << stack[0] << " r:" << stack[1] << "\n";
 		stack = (u32int*)stack[0];
 	}
diff --git a/Source/Kernel/Core/Sys.ns.h b/Source/Kernel/Core/Sys.ns.h
index 4d15676..9b34dbf 100644
--- a/Source/Kernel/Core/Sys.ns.h
+++ b/Source/Kernel/Core/Sys.ns.h
@@ -18,9 +18,12 @@
 
 //This file contains system-relative functions
 class String;
+class SimpleVT;
 class VirtualTerminal;
 struct registers_t;
 
+extern SimpleVT* kvt;
+
 namespace Sys {
 	void outb(u16int port, u8int value);
 	u8int inb(u16int port);
diff --git a/Source/Kernel/Core/kmain.wtf.cpp b/Source/Kernel/Core/kmain.wtf.cpp
index 0486702..a028457 100644
--- a/Source/Kernel/Core/kmain.wtf.cpp
+++ b/Source/Kernel/Core/kmain.wtf.cpp
@@ -25,6 +25,7 @@
 #include <Rand.ns.h>
 #include <VFS/Part.ns.h>
 #include <FileSystems/RamFS/RamFS.class.h>
+#include <FileSystems/FAT/FATFS.class.h>
 #include <VFS/FileNode.class.h>
 #include <VFS/VFS.ns.h>
 #include <VFS/DirectoryNode.class.h>
@@ -37,6 +38,8 @@ extern u32int end;	//Placement address
 
 extern "C" void kmain(multiboot_info_t* mbd, u32int magic);
 
+SimpleVT* kvt;
+
 u32int logoAnimation(void* p) {
 	SimpleVT& vt = *((SimpleVT*)p);
 	vt.setColor(8);
@@ -83,7 +86,7 @@ u32int logoAnimation(void* p) {
 
 void selectVideoMode(SimpleVT& v) {
 	Disp::getModes();
-	v << "\n\nPlease select a graphic mode in the list below:\n";
+	v << "\nPlease select a graphic mode in the list below:\n";
 
 	for (u32int i = 0; i < Disp::modes.size(); i++) {
 		Disp::mode_t& m = Disp::modes[i];
@@ -140,9 +143,9 @@ void kmain(multiboot_info_t* mbd, u32int magic) {
 	Disp::setText(vgaout);
 
 	//Create a VT for logging what kernel does
-	SimpleVT *kvt = new ScrollableVT(25, 80, 20, KVT_FGCOLOR, KVT_BGCOLOR);
+	kvt = new ScrollableVT(25, 80, 20, KVT_FGCOLOR, KVT_BGCOLOR);
 	kvt->map(0, 0);
-	*kvt << "Melon is loading...";
+	*kvt << "Melon is loading...\n";
 
 	IDT::init();		//Setup interrupts 
 
@@ -164,13 +167,17 @@ void kmain(multiboot_info_t* mbd, u32int magic) {
 	//***************************************	PARSE COMMAND LINE
 	
 	Vector<String> opts = kcmdline.split(" ");
-	String keymap = "fr", init = "/System/Applications/PaperWork.app";
+	String keymap = "builtin", init = "/System/Applications/PaperWork.app";
+	String root = "ramfs:0";
+	Vector<String> mount;
 	bool enableVESA = true;
 	for (u32int i = 0; i < opts.size(); i++) {
 		Vector<String> opt = opts[i].split(":");
 		if (opt[0] == "vesa" && opt[1] != "enabled") enableVESA = false;
 		if (opt[0] == "keymap") keymap = opt[1];
 		if (opt[0] == "init") init = opt[1];
+		if (opt[0] == "root") root = opts[i].substr(5);
+		if (opt[0] == "mount") mount.push(opts[i].substr(6));
 	}
 
 	//*************************************** 	DEVICE SETUP
@@ -180,16 +187,26 @@ void kmain(multiboot_info_t* mbd, u32int magic) {
 	if (enableVESA) Dev::registerDevice(new VESADisplay());
 	FloppyController::detect();
 
-	//***************************************	MOUNT ROOT FILESYSTEM
+	//***************************************	MOUNT FILESYSTEMS
 
-	FileSystem* fs = RamFS::mount((u8int*)mods[0].mod_start, 1024 * 1024, NULL);
+	{	// mount root filesystem
+		if (!VFS::mount(String("/:") += root, kvt, mbd)) PANIC("Cannot mount root filesystem.");
+	}
 	DirectoryNode* cwd;
-	cwd = fs->getRootNode();
+	cwd = VFS::getRootNode();
 	Task::currProcess()->setCwd(cwd);
-	VFS::setRootNode(cwd);
+
+	// mount other filesystems
+	for (u32int i = 0; i < mount.size(); i++) {
+		VFS::mount(mount[i], kvt, mbd);
+	}
+
+	//FATFS::mount(Part::partitions[0], (DirectoryNode*)VFS::createDirectory("/Mount"));
+	
+	//***************************************	LOAD SYSTEM STUFF
 
 	if (keymap != "builtin") {
-		if (!Kbd::loadKeymap(keymap)) *kvt << "\nWARNING : Could not load keymap " << keymap << ", using built-in keymap instead.";
+		if (!Kbd::loadKeymap(keymap)) *kvt << "WARNING : Could not load keymap " << keymap << ", using built-in keymap instead.";
 	}
 
 	Log::init(KL_STATUS);	//Setup logging
@@ -199,7 +216,7 @@ void kmain(multiboot_info_t* mbd, u32int magic) {
 	Log::log(KL_STATUS, "kmain : User list loaded");
 
 	if (init.empty()) {
-		*kvt << "\n\n";
+		*kvt << "\n";
 		new KernelShell(cwd, kvt);
 		while (KernelShell::getInstances() > 0) {
 			Task::currThread()->sleep(100);
diff --git a/Source/Kernel/Devices/Floppy/FloppyController.class.cpp b/Source/Kernel/Devices/Floppy/FloppyController.class.cpp
index 146ce28..7201c5c 100644
--- a/Source/Kernel/Devices/Floppy/FloppyController.class.cpp
+++ b/Source/Kernel/Devices/Floppy/FloppyController.class.cpp
@@ -96,6 +96,7 @@ FloppyController::FloppyController(u32int base, u8int irq) : m_driveMutex(false)
 	m_drives[0] = NULL;
 	m_drives[1] = NULL;
 	m_first = false;
+	Dev::requestIRQ(this, m_irq);
 }
 
 void FloppyController::detect() {	//TODO : do this better
@@ -144,16 +145,14 @@ void FloppyController::setDOR() {
 		dor |= 0x10;
 	if (m_drives[1] != NULL and m_drives[1]->m_motorState != 0)
 		dor |= 0x20;
-	asm volatile ("cli");
+	resetIrq();
 	outb(m_base + FR_DOR, dor);
 	if (m_first) {	//First time we set the DOR, controller initialized
-		Task::currThread()->waitIRQ(m_irq);
+		waitIrq();
 		int st0, cyl;
 		checkInterrupt(&st0, &cyl);
 		m_first = false;
 	}
-	asm volatile ("sti");
-			//PANIC("test");
 }
 
 void FloppyController::setActiveDrive(u8int drive) {
@@ -190,10 +189,10 @@ u8int FloppyController::readData() {
 bool FloppyController::reset() {
 	outb(m_base + FR_DOR, 0x00);	//Disable controller
 	m_first = true;
-	setNoActiveDrive();
 
 	if (m_drives[0] != NULL) m_drives[0]->m_motorState = 0;
 	if (m_drives[1] != NULL) m_drives[1]->m_motorState = 0;
+	setNoActiveDrive();
 
 	for (int i = 0; i < 2; i++) {
 		if (m_drives[i] != NULL) {
@@ -203,3 +202,11 @@ bool FloppyController::reset() {
 	}
 	return true;
 }
+
+void FloppyController::handleIRQ(registers_t regs, int irq) {
+	m_irqHappened = true;
+}
+
+void FloppyController::waitIrq() {
+	while (!m_irqHappened) Task::currThread()->sleep(10);
+}
diff --git a/Source/Kernel/Devices/Floppy/FloppyController.class.h b/Source/Kernel/Devices/Floppy/FloppyController.class.h
index a27d853..f0a7c10 100644
--- a/Source/Kernel/Devices/Floppy/FloppyController.class.h
+++ b/Source/Kernel/Devices/Floppy/FloppyController.class.h
@@ -60,6 +60,8 @@ class FloppyController : public Device {
 
 	bool m_first;
 
+	bool m_irqHappened;
+
 	FloppyDrive* m_drives[2];
 
 	void checkInterrupt(int *st0, int *cyl);
@@ -69,6 +71,10 @@ class FloppyController : public Device {
 	bool writeCmd(u8int cmd);			//Sends command to controller
 	u8int readData();					//Reads a byte from controller
 	bool reset();
+
+	void handleIRQ(registers_t regs, int irq);
+	void resetIrq() { m_irqHappened = false; }
+	void waitIrq();
 	
 	public:
 	static void detect();
diff --git a/Source/Kernel/Devices/Floppy/FloppyDrive.class.cpp b/Source/Kernel/Devices/Floppy/FloppyDrive.class.cpp
index 7edf24a..b7fd69b 100644
--- a/Source/Kernel/Devices/Floppy/FloppyDrive.class.cpp
+++ b/Source/Kernel/Devices/Floppy/FloppyDrive.class.cpp
@@ -2,6 +2,7 @@
 #include "FloppyController.class.h"
 #include <TaskManager/Task.ns.h>
 #include <DeviceManager/Time.ns.h>
+#include <VTManager/SimpleVT.class.h>
 #include <Core/Log.ns.h>
 
 using namespace Sys;
@@ -91,16 +92,18 @@ bool FloppyDrive::calibrate() {
 
 	int st0, cyl = -1;
 
-	if (!setMotorState(true)) return false;
+	if (!setMotorState(true)) {
+		*kvt << getName() << ": calibrate fail\n";
+		return false;
+	}
 
 	for (int i = 0; i < 10; i++) {
-		asm volatile("cli");
+		m_fdc->resetIrq();
 		m_fdc->writeCmd(FC_RECALIBRATE);
 		m_fdc->writeCmd(m_driveNumber);
 
-		Task::currThread()->waitIRQ(m_fdc->m_irq);
+		m_fdc->waitIrq();
 		m_fdc->checkInterrupt(&st0, &cyl);
-		asm volatile("sti");
 
 		if (st0 & 0xC0) {
 			continue;
@@ -111,6 +114,7 @@ bool FloppyDrive::calibrate() {
 		}
 	}
 	setMotorState(false);
+	*kvt << getName() << ": calibrate fail\n";
 	return false;
 }
 
@@ -137,47 +141,44 @@ bool FloppyDrive::killMotor() {
 	return true;
 }
 
-bool FloppyDrive::seek(u32int cyli, s32int head) {
+bool FloppyDrive::seek(u32int cyli, s32int head, bool recursive) {
 	if (cyli >= m_cylinders) return false;
-	m_fdc->setActiveDrive(m_driveNumber);
 
 	setMotorState(true);	//Turn on motor
 
 	int st0, cyl = -1;
 
-	for (u32int i = 0; i < 10; i++) {
-		asm volatile ("cli");
+	for (u32int i = 0; i < (recursive ? 10 : 5); i++) {
+		m_fdc->resetIrq();
 		m_fdc->writeCmd(FC_SEEK);
-		m_fdc->writeCmd(head << 2);
+		m_fdc->writeCmd(head << 2 | m_driveNumber);
 		m_fdc->writeCmd(cyl);
 
-		Task::currThread()->waitIRQ(m_fdc->m_irq);
+		m_fdc->waitIrq();
 		m_fdc->checkInterrupt(&st0, &cyl);
-		asm volatile("sti");
 
 		if (st0 & 0xC0) { //Error
 			continue;
 		}
-		if (cyl == 0xFF or cyl == 0x00) {	//0xFF for bochs, 0x00 for qemu :D
-			setMotorState(false);
-			m_fdc->setNoActiveDrive();
-			return true;
-		}
-		if (cyl == (int)cyli) {
+		if (cyl == 0xFF or cyl == 0x00 or cyl == (int)cyli) {	//0xFF for bochs, 0x00 for qemu :D
 			setMotorState(false);
-			m_fdc->setNoActiveDrive();
 			return true;
 		}
 	}
-	setMotorState(false);
-	m_fdc->setNoActiveDrive();
-	return false;
+	if (recursive) {
+		setMotorState(false);
+		*kvt << getName() << ": seek fail\n";
+		return false;
+	} else {
+		calibrate();
+		return seek(cyli, head, true);
+	}
 }
 
 bool FloppyDrive::doTrack(u32int cyl, u8int dir) {
+	m_fdc->setActiveDrive(m_driveNumber);
 	if (!seek(cyl, 0)) return false;
 	if (!seek(cyl, 1)) return false;
-	m_fdc->setActiveDrive(m_driveNumber);
 
 	u8int cmd, flags = 0xC0;
 	switch (dir) {
@@ -203,7 +204,7 @@ bool FloppyDrive::doTrack(u32int cyl, u8int dir) {
 
 		Task::currThread()->sleep(100);
 
-		asm volatile("cli");
+		m_fdc->resetIrq();
 		m_fdc->writeCmd(cmd);
 		m_fdc->writeCmd(m_driveNumber);	//Drive number & first head << 2
 		m_fdc->writeCmd(cyl);	//Cylinder
@@ -214,7 +215,7 @@ bool FloppyDrive::doTrack(u32int cyl, u8int dir) {
 		m_fdc->writeCmd(0x1B);
 		m_fdc->writeCmd(0xFF);
 
-		Task::currThread()->waitIRQ(m_fdc->m_irq);
+		m_fdc->waitIrq();
 
 		u8int st0, st1, st2, rcy, rhe, rse, bps;
 		st0 = m_fdc->readData();
@@ -224,7 +225,6 @@ bool FloppyDrive::doTrack(u32int cyl, u8int dir) {
 		rhe = m_fdc->readData();
 		rse = m_fdc->readData();
 		bps = m_fdc->readData();
-		asm volatile("sti");
 
 		int error = 0;
 	
@@ -274,12 +274,11 @@ bool FloppyDrive::doTrack(u32int cyl, u8int dir) {
 
 bool FloppyDrive::readOnly() {
 	m_fdc->setActiveDrive(m_driveNumber);
-	asm volatile("cli");
+	m_fdc->resetIrq();
 	m_fdc->writeCmd(FC_SENSE_DRIVE_STATUS);
 	m_fdc->writeCmd(m_driveNumber);
-	Task::currThread()->waitIRQ(m_fdc->m_irq);
+	m_fdc->waitIrq();
 	u8int st3 = m_fdc->readData();
-	asm volatile("sti");
 
 	bool ret = (st3 & 0x80 ? true : false);
 
@@ -296,16 +295,13 @@ bool FloppyDrive::readBlocks(u64int start, u32int count, u8int *data) {
 	u32int startblock = start;
 	if (count == 1) {
 		u32int cylinder = (startblock / (m_sectors * 2)), offset = (startblock % (m_sectors * 2)) * 512;
-		if (m_buffCyl == cylinder && m_buffTime >= Time::uptime() - 4) {
-			memcpy(data, (const u8int*)(&m_buffer[offset]), 512);
-			return true;
-		} else {
+		if (m_buffCyl != cylinder or m_buffTime < Time::uptime() - 4) {
 			if (!doTrack(cylinder, FD_READ)) return false;
 			m_buffCyl = cylinder;
 			m_buffTime = Time::uptime();
-			memcpy(data, (const u8int*)(&m_buffer[offset]), 512);
-			return true;
 		}
+		memcpy(data, (const u8int*)(&m_buffer[offset]), 512);
+		return true;
 	} else {
 		m_buffCyl = 0xFFFF;	//Invalid cylinder
 		m_buffTime = 0;
diff --git a/Source/Kernel/Devices/Floppy/FloppyDrive.class.h b/Source/Kernel/Devices/Floppy/FloppyDrive.class.h
index 75926ea..73229b1 100644
--- a/Source/Kernel/Devices/Floppy/FloppyDrive.class.h
+++ b/Source/Kernel/Devices/Floppy/FloppyDrive.class.h
@@ -22,7 +22,7 @@ class FloppyDrive : public BlockDevice {
 	bool calibrate();
 	bool setMotorState(bool on);
 	bool killMotor();
-	bool seek(u32int cyli, s32int head);
+	bool seek(u32int cyli, s32int head, bool recursive = false);
 	bool doTrack(u32int cyl, u8int dir);
 
 	public:
diff --git a/Source/Kernel/FileSystems/FAT/FATDirectoryNode.class.h b/Source/Kernel/FileSystems/FAT/FATDirectoryNode.class.h
new file mode 100644
index 0000000..c2f55e1
--- /dev/null
+++ b/Source/Kernel/FileSystems/FAT/FATDirectoryNode.class.h
@@ -0,0 +1,16 @@
+#ifndef DEF_FATDIRECTORYNODE_CLASS_H
+#define DEF_FATDIRECTORYNODE_CLASS_H
+
+#include <VFS/DirectoryNode.class.h>
+
+class FATDirectoryNode : public DirectoryNode {
+	friend class FATFS;
+	FATDirectoryNode(String name, FileSystem* fs, FSNode* parent, u32int permissions = 0777,
+			u32int uid = 0, u32int gid = 0) :
+			DirectoryNode(name, fs, parent, permissions, uid, gid) {}
+
+	u32int m_firstCluster;
+	u32int m_firstDirEntryID;	//id of the first directory entry corresponding to this file in parent directory
+};
+
+#endif
diff --git a/Source/Kernel/FileSystems/FAT/FATFS.class.cpp b/Source/Kernel/FileSystems/FAT/FATFS.class.cpp
new file mode 100644
index 0000000..4c20b3f
--- /dev/null
+++ b/Source/Kernel/FileSystems/FAT/FATFS.class.cpp
@@ -0,0 +1,247 @@
+#include "FATFS.class.h"
+#include <VTManager/SimpleVT.class.h>
+#include "FATFileNode.class.h"
+#include "FATDirectoryNode.class.h"
+#include <VFS/VFS.ns.h>
+#include <ByteArray.class.h>
+
+#define FIRSTCLUS(node) ((u32int&)(node->type() == NT_DIRECTORY ? \
+			((FATDirectoryNode*)(node))->m_firstCluster : \
+			((FATFileNode*)(node))->m_firstCluster))
+#define FIRSTDEID(node) ((u32int&)(node->type() == NT_DIRECTORY ? \
+			((FATDirectoryNode*)(node))->m_firstDirEntryID : \
+			((FATFileNode*)(node))->m_firstDirEntryID))
+
+FileSystem* FATFS::mount(Partition* p, DirectoryNode* mountpoint, bool readwrite) {
+	if (readwrite) return 0;
+	if (mountpoint != 0 and !mountpoint->mountpointable()) return 0;
+	//		***	READ BOOT SECTOR ***
+	union {
+		fat_BS_t s;
+		u8int c[512];
+	} bs;
+	if (!p->readBlocks(0, 1, bs.c)) return 0;
+	//		*** CHECK FILESYSTEM TYPE ***
+	if (bs.s.extBS_16.boot_signature != 0x28 and bs.s.extBS_16.boot_signature != 0x29
+			and bs.s.extBS_32.boot_signature != 0x28 and bs.s.extBS_32.boot_signature != 0x29) return 0;
+	//		*** DO SOME CALCULATIONS ***
+	FATFS* fs = new FATFS(p);
+	fs->m_fatSize = (bs.s.table_size_16 == 0 ? bs.s.extBS_32.table_size_32 : bs.s.table_size_16);
+	fs->m_totalSectors = (bs.s.total_sectors_16 == 0 ? bs.s.total_sectors_32 : bs.s.total_sectors_16);
+	fs->m_rootDirSectors = ((bs.s.root_entry_count * 32) + (bs.s.bytes_per_sector - 1)) / bs.s.bytes_per_sector;
+	fs->m_firstDataSector = bs.s.reserved_sector_count + (fs->m_fatSize * bs.s.table_count);
+	fs->m_clusterSize = bs.s.bytes_per_sector * bs.s.sectors_per_cluster;
+	u32int dataSectors = fs->m_totalSectors - (fs->m_firstDataSector + fs->m_rootDirSectors);
+	fs->m_countOfClusters = dataSectors / bs.s.sectors_per_cluster;
+	if (fs->m_countOfClusters < 4085) {	//Find out FAT type
+		fs->m_fatType = 12;
+	} else if (fs->m_countOfClusters < 65525) {
+		fs->m_fatType = 16;
+	} else {
+		fs->m_fatType = 32;
+	}
+	fs->m_readOnly = true;
+	fs->m_bs = bs.s;
+	//		*** CREATE ROOT DIRECTORY NODE ***
+	fs->m_rootNode = new FATDirectoryNode("/", fs, mountpoint);
+	FIRSTCLUS(fs->m_rootNode) = 2;
+	if (fs->m_fatType == 32) FIRSTCLUS(fs->m_rootNode) = bs.s.extBS_32.root_cluster;
+	if (!fs->m_rootNode->loadContent()) {
+		*kvt << "Could not read FAT filesystem root directory.\n";
+		delete fs;
+		return 0;
+	}
+	fs->m_fatCache.init(fs->m_fatType == 12 ? 8 : (fs->m_fatType == 16 ? 20 : 40));
+	if (mountpoint != 0) mountpoint->mount(fs->m_rootNode);
+	VFS::registerFilesystem(fs);
+	*kvt << "Detected a FAT" << (s64int)fs->m_fatType << " filesystem.\n" <<
+		"root_dir_sectors:" << fs->m_rootDirSectors << " fat_size:" << fs->m_fatSize << " total_sectors:" <<
+		fs->m_totalSectors << " data_sectors:" << dataSectors << " count_of_clusters:" << fs->m_countOfClusters <<
+		" sizeof(fat_dir_entry_t):" << sizeof(fat_dir_entry_t) << " first_data_sector:" << fs->m_firstDataSector <<
+		" cluster_size:" << fs->m_clusterSize << "\n";
+	return fs;
+}
+
+u32int FATFS::nextCluster(u32int cluster) {
+	u8int fat_table[m_part->blockSize()];
+	u32int val;
+	if (m_fatType == 12) {
+		u32int fat_offset = cluster + (cluster / 2);
+		u32int fat_sector = m_bs.reserved_sector_count + (fat_offset / m_part->blockSize());
+		u32int ent_offset = fat_offset % m_part->blockSize();
+		m_fatCache.readBlocks(fat_sector, 1, fat_table);
+		u16int tblval = *(u16int*)&fat_table[ent_offset];
+		if (cluster & 1) val = tblval >> 4;
+		else val = tblval & 0x0FFF;
+		if (val >= 0xFF7) val = 0;
+	} else if (m_fatType == 16) {
+		u32int fat_offset = cluster * 2;
+		u32int fat_sector = m_bs.reserved_sector_count + (fat_offset / m_part->blockSize());
+		u32int ent_offset = fat_offset % m_part->blockSize();
+		m_fatCache.readBlocks(fat_sector, 1, fat_table);
+		u16int tblval = *(u16int*)&fat_table[ent_offset];
+		val = tblval;
+		if (tblval >= 0xFFF7) val = 0;
+	} else if (m_fatType == 32) {
+		u32int fat_offset = cluster * 4;
+		u32int fat_sector = m_bs.reserved_sector_count + (fat_offset / m_part->blockSize());
+		u32int ent_offset = fat_offset % m_part->blockSize();
+		m_fatCache.readBlocks(fat_sector, 1, fat_table);
+		val = *(u32int*)&fat_table[ent_offset] & 0x0FFFFFFF;
+		if (val >= 0x0FFFFFF7) val = 0;
+	}
+	return val;
+}
+
+bool FATFS::readCluster(u32int cluster, u8int* data) {
+	u32int firstSector = ((cluster - 2) * m_bs.sectors_per_cluster) + m_firstDataSector;
+	if (cluster > 2 and m_fatType != 32) firstSector += m_rootDirSectors;
+	return m_part->readBlocks(firstSector, m_bs.sectors_per_cluster, data);
+}
+
+bool FATFS::unmount() {
+	if (m_readOnly) return true;
+	return false;
+}
+
+bool FATFS::setName(FSNode* node, String name) {
+	if (m_readOnly) return false;
+	return false;
+}
+
+bool FATFS::setPermissions(FSNode* node, u32int permissions) {
+	if (m_readOnly) return false;
+	return false;
+}
+
+bool FATFS::setUid(FSNode* node, u32int uid) {
+	if (m_readOnly) return false;
+	return false;
+}
+
+bool FATFS::setGid(FSNode* node, u32int gid) {
+	if (m_readOnly) return false;
+	return false;
+}
+
+bool FATFS::setParent(FSNode* node, FSNode* parent) {
+	if (m_readOnly) return false;
+	return false;
+}
+
+u32int FATFS::read(FileNode* file, u64int position, u32int max_length, u8int *data) {
+	u32int len = max_length;
+	if (position >= file->getLength()) return 0;
+	if (position + len > file->getLength()) len = file->getLength() - position;
+	u32int firstCluster = position / m_clusterSize, clusterOffset = position % m_clusterSize;
+	u32int clusters = (len + clusterOffset) / m_clusterSize + 1, lastClusBytesToRead = (len + clusterOffset) % m_clusterSize;
+	u32int clust = FIRSTCLUS(file);
+	//Find first cluster
+	for (u32int i = 0; i < firstCluster and clust != 0; i++) clust = nextCluster(clust);
+	if (clust == 0) return 0;
+	//Read first cluster
+	u8int* temp = (u8int*)Mem::alloc(m_clusterSize);
+	readCluster(clust, temp);
+	memcpy(data, temp + clusterOffset, (len > m_clusterSize - clusterOffset ? m_clusterSize - clusterOffset : len));
+	//Read next cluster
+	u32int pos = (m_clusterSize - clusterOffset);
+	for (u32int i = 1; i < clusters; i++) {
+		clust = nextCluster(clust);
+		if (clust == 0) break;
+		readCluster(clust, temp);
+		memcpy(data + pos, temp, (i == clusters - 1 ? lastClusBytesToRead : m_clusterSize));
+		pos += m_clusterSize;
+	}
+	Mem::free(temp);
+	return len;
+}
+
+bool FATFS::write(FileNode* file, u64int position, u32int length, u8int* data) {
+	if (m_readOnly) return false;
+	return false;
+}
+
+bool FATFS::truncate(FileNode* file) {
+	if (m_readOnly) return false;
+	return false;
+}
+
+bool FATFS::loadContents(DirectoryNode* dir) {
+	u32int cluster = FIRSTCLUS(dir);
+	union {
+		u8int *c;
+		fat_dir_entry_t *e;
+	} e;
+
+	u32int entries = m_clusterSize / sizeof(fat_dir_entry_t);
+	if (cluster == 2 and m_fatType != 32) {		//This is the value we use for the root directory
+		e.c = (u8int*)Mem::alloc(m_rootDirSectors * m_part->blockSize());
+		if (!m_part->readBlocks(m_firstDataSector, m_rootDirSectors, e.c)) return false;
+	} else {
+		e.c = (u8int*)Mem::alloc(m_clusterSize);
+	}
+
+	ByteArray lfnBuffer;
+	while (cluster != 0) {
+		if (cluster != 2 or m_fatType == 32) {
+			if (!readCluster(cluster, e.c)) return false;
+		}
+		for (u32int i = 0; i < entries; i++) {
+			if (e.e[i].attributes == FA_LFN && e.c[i*32] != 0xE5) {	//Long file name entry
+				u8int num = e.c[i*32] & 0x3;
+				if (lfnBuffer.size() < num * 26) lfnBuffer.resize(num * 26);
+				num--;
+				memcpy(lfnBuffer + (num * 26), e.c + (i*32 + 1), 10);
+				memcpy(lfnBuffer + (num * 26 + 10), e.c + (i*32 + 14), 12);
+				memcpy(lfnBuffer + (num * 26 + 22), e.c + (i*32 + 28), 4);
+			}
+			if (e.e[i].attributes & FA_VOLUMEID) continue;
+			if (e.e[i].name[0] == 0  or e.e[i].name[0] == 0xE5) continue;	//Nothing intresting here.
+			String name;
+			if (lfnBuffer.empty()) {
+				for (int j = 0; j < 8; j++) {
+					if (e.e[i].name[j] == ' ') break;
+					name += WChar(e.e[i].name[j]);
+				}
+				for (int j = 0; j < 3; j++) {
+					if (e.e[i].extension[j] == ' ') break;
+					if (j == 0) name += ".";
+					name += WChar(e.e[i].extension[j]);
+				}
+			} else {
+				name = lfnBuffer.toString(UE_UTF16_LE);
+				lfnBuffer.clear();
+			}
+			u32int first_clus = (e.e[i].first_clust_high << 16) + e.e[i].first_clust_low;
+			FSNode* n;
+			if (e.e[i].attributes & FA_DIRECTORY) {
+				if (name == "." or name == "..") continue;
+				n = new FATDirectoryNode(name, this, dir);
+			} else {
+				n = new FATFileNode(name, this, dir, e.e[i].size);
+			}
+			FIRSTCLUS(n) = first_clus;
+			dir->getChildren().push(n);
+		}
+		if (cluster == 2 && m_fatType != 32) break;	//We are in a FAT12/16 root directory
+		cluster = nextCluster(cluster);
+	}
+
+	Mem::free(e.c);
+	return true;
+}
+
+FileNode* FATFS::createFile(DirectoryNode* parent, String name) {
+	if (m_readOnly) return false;
+	return 0;
+}
+
+DirectoryNode* FATFS::createDirectory(DirectoryNode* parent, String name) {
+	if (m_readOnly) return false;
+	return 0;
+}
+
+bool FATFS::remove(DirectoryNode* parent, FSNode* node) {
+	if (m_readOnly) return false;
+	return false;
+}
diff --git a/Source/Kernel/FileSystems/FAT/FATFS.class.h b/Source/Kernel/FileSystems/FAT/FATFS.class.h
new file mode 100644
index 0000000..fbefc02
--- /dev/null
+++ b/Source/Kernel/FileSystems/FAT/FATFS.class.h
@@ -0,0 +1,134 @@
+#ifndef DEF_FATFS_CLASS_H
+#define DEF_FATFS_CLASS_H
+
+#include <VFS/FileSystem.proto.h>
+#include <VFS/Part.ns.h>
+#include <VFS/BlockCache.class.h>
+
+struct fat_extBS_32_t {			//Extended boot sector for FAT32
+	unsigned int		table_size_32;
+	unsigned short		extended_flags;
+	unsigned short		fat_version;
+	unsigned int		root_cluster;
+	unsigned short		fat_info;
+	unsigned short		backup_BS_sector;
+	unsigned char 		reserved_0[12];
+	unsigned char		drive_number;
+	unsigned char 		reserved_1;
+	unsigned char		boot_signature;
+	unsigned int 		volume_id;
+	unsigned char		volume_label[11];
+	unsigned char		fat_type_label[8];
+}__attribute__((packed));
+
+struct fat_extBS_16_t {	//Extended boot sector for FAT12 and FAT16
+	unsigned char		bios_drive_num;
+	unsigned char		reserved1;
+	unsigned char		boot_signature;
+	unsigned int		volume_id;
+	unsigned char		volume_label[11];
+	unsigned char		fat_type_label[8];
+}__attribute__((packed));
+
+struct fat_BS_t {		//Boot sector
+	unsigned char 		bootjmp[3];
+	unsigned char 		oem_name[8];
+	unsigned short 	        bytes_per_sector;
+	unsigned char		sectors_per_cluster;
+	unsigned short		reserved_sector_count;
+	unsigned char		table_count;
+	unsigned short		root_entry_count;
+	unsigned short		total_sectors_16;
+	unsigned char		media_type;
+	unsigned short		table_size_16;
+	unsigned short		sectors_per_track;
+	unsigned short		head_side_count;
+	unsigned int 		hidden_sector_count;
+	unsigned int 		total_sectors_32;
+	union {
+		fat_extBS_32_t	extBS_32;
+		fat_extBS_16_t	extBS_16;
+	};
+}__attribute__((packed));
+
+struct fat_date_t {
+	u16int year		: 7;
+	u16int month	: 4;
+	u16int day		: 5;
+}__attribute__((packed));
+
+struct fat_time_t {
+	u16int hour		: 5;
+	u16int minutes	: 6;
+	u16int seconds	: 5;
+}__attribute__((packed));
+
+struct fat_dir_entry_t {
+	char name[8];
+	char extension[3];
+	u8int attributes;
+	u8int reserved;
+	u8int createtenthsofseconds;
+	fat_time_t created_time;
+	fat_date_t created_date;
+	fat_date_t accessed_date;
+	u16int first_clust_high;	//always 0 on FAT12/16
+	fat_time_t modified_time;
+	fat_date_t modified_date;
+	u16int first_clust_low;
+	u32int size;
+}__attribute__((packed));
+
+#define FA_READONLY 0x01
+#define FA_HIDDEN 0x02
+#define FA_SYSTEM 0x04
+#define FA_VOLUMEID 0x08
+#define FA_DIRECTORY 0x10
+#define FA_ARCHIVE 0x20
+#define FA_LFN 0x0F
+
+class FATFS : public FileSystem {
+	private:
+	fat_BS_t m_bs;
+	bool m_readOnly;
+	u32int m_fatSize;	//Size of one FAT, in sectors
+	u32int m_totalSectors;	//Total sectors used by the FAT
+	u32int m_rootDirSectors;	//Sectors used by the root directory
+	u32int m_firstDataSector;	//First data sector, start of cluster 2
+	u32int m_countOfClusters;	//Count of usable clusters, EXCLUDING the ones used by the root directory
+	u32int m_clusterSize;	//size of a cluster in bytes
+	u32int m_fatType;	//12, 16 or 32
+	Partition* m_part;
+	BlockCache<Partition> m_fatCache;
+
+	u32int nextCluster(u32int cluster);		//Get the next cluster number in the chain (0 = EOF)
+	bool readCluster(u32int cluster, u8int* data);	//Read the content of a cluster to a buffer
+	
+	~FATFS() {}
+	FATFS(Partition* p) : m_part(p), m_fatCache(p) {}
+
+	public:
+	static FileSystem* mount(Partition* p, DirectoryNode* mountpoint, bool readwrite = false);
+
+	bool unmount();
+
+	String getDevDescription() { return Part::partIdentifier(m_part); }
+
+	bool setName(FSNode* node, String name);
+	bool setPermissions(FSNode* node, u32int permissions);
+	bool setUid(FSNode* node, u32int uid);
+	bool setGid(FSNode* node, u32int gid);
+	bool setParent(FSNode* node, FSNode* parent);
+
+	u32int read(FileNode* file, u64int position, u32int max_length, u8int *data);
+	bool write(FileNode* file, u64int position, u32int length, u8int *data);
+	bool truncate(FileNode* file);
+
+	bool loadContents(DirectoryNode* dir);
+	FileNode* createFile(DirectoryNode* parent, String name);
+	DirectoryNode* createDirectory(DirectoryNode* parent, String name);
+	bool remove(DirectoryNode* parent, FSNode* node);
+};
+
+#endif
+
diff --git a/Source/Kernel/FileSystems/FAT/FATFileNode.class.h b/Source/Kernel/FileSystems/FAT/FATFileNode.class.h
new file mode 100644
index 0000000..b64f911
--- /dev/null
+++ b/Source/Kernel/FileSystems/FAT/FATFileNode.class.h
@@ -0,0 +1,16 @@
+#ifndef DEF_FATFILENODE_CLASS_H
+#define DEF_FATFILENODE_CLASS_H
+
+#include <VFS/FileNode.class.h>
+
+class FATFileNode : public FileNode {
+	friend class FATFS;
+	FATFileNode (String name, FileSystem* fs, FSNode* parent, u32int size, u32int permissions = 0777,
+			u32int uid = 0, u32int gid = 0) :
+		FileNode(name, fs, parent, size, permissions, uid, gid){}
+
+	u32int m_firstCluster;
+	u32int m_firstDirEntryID;	//id of the first directory entry corresponding to this file in parent directory
+};
+
+#endif
diff --git a/Source/Kernel/FileSystems/RamFS/RamFS.class.cpp b/Source/Kernel/FileSystems/RamFS/RamFS.class.cpp
index 5997841..e6370d0 100644
--- a/Source/Kernel/FileSystems/RamFS/RamFS.class.cpp
+++ b/Source/Kernel/FileSystems/RamFS/RamFS.class.cpp
@@ -1,30 +1,36 @@
 #include "RamFS.class.h"
 #include <VFS/DirectoryNode.class.h>
 #include "RamFileNode.class.h"
+#include <VFS/VFS.ns.h>
 
 RamFS::RamFS() {
 }
 
 RamFS::~RamFS() {
-	delete m_rootNode;
 }
 
 RamFS* RamFS::mount(u32int maxSize, DirectoryNode* mountpoint) {
+	if (mountpoint != 0 and !mountpoint->mountpointable()) return 0;
 	RamFS* rfs = new RamFS();
 	rfs->m_maxSize = maxSize;
 	rfs->m_usedSize = 0;
 	rfs->m_isWritable = true;
 	rfs->m_rootNode = new DirectoryNode("/", rfs, mountpoint);	
+	if (mountpoint != 0) mountpoint->mount(rfs->m_rootNode);
+	VFS::registerFilesystem(rfs);
 	return rfs;
 }
 
 RamFS* RamFS::mount(u8int *ptr, u32int maxSize, DirectoryNode* mountpoint, bool writable) {
+	if (mountpoint != 0 and !mountpoint->mountpointable()) return 0;
 	RamFS* rfs = new RamFS();
 
 	rfs->m_maxSize = maxSize;
 	rfs->m_usedSize = 0;
 	rfs->m_isWritable = true;
 	rfs->m_rootNode = new DirectoryNode("/", rfs, mountpoint);
+	if (mountpoint != 0) mountpoint->mount(rfs->m_rootNode);
+	VFS::registerFilesystem(rfs);
 
 	union {
 		u8int* c;
@@ -81,7 +87,7 @@ RamFS* RamFS::mount(u8int *ptr, u32int maxSize, DirectoryNode* mountpoint, bool
 }
 
 bool RamFS::unmount() {
-	return m_rootNode->unmountable();
+	return true;
 }
 
 bool RamFS::setName(FSNode* node, String name) { return true; }
@@ -164,6 +170,7 @@ bool RamFS::remove(DirectoryNode* parent, FSNode* node) {
 	if (node->type() == NT_FILE) {
 		u8int *d = ((RamFileNode*)node)->m_data;
 		if (d != 0) Mem::free(d);
+		((RamFileNode*)node)->m_data = 0;
 	}
 	return true;
 }
diff --git a/Source/Kernel/FileSystems/RamFS/RamFS.class.h b/Source/Kernel/FileSystems/RamFS/RamFS.class.h
index 1d60796..042baa9 100644
--- a/Source/Kernel/FileSystems/RamFS/RamFS.class.h
+++ b/Source/Kernel/FileSystems/RamFS/RamFS.class.h
@@ -17,10 +17,10 @@ struct initrd_file_header {
 
 class RamFS : public FileSystem {
 	private:
-	~RamFS();
+	virtual ~RamFS();
 	RamFS(const RamFS& other);
 	RamFS();
-	bool unmount();	//TO BE USED ONLY BY VFS::UNMOUNT (when will exist...)
+	bool unmount();
 
 	u32int m_maxSize;
 	u32int m_usedSize;
@@ -35,6 +35,8 @@ class RamFS : public FileSystem {
 	bool setGid(FSNode* node, u32int gid);
 	bool setParent(FSNode* node, FSNode* parent);
 
+	String getDevDescription() { return "ramfs"; }
+
 	u32int read(FileNode* file, u64int position, u32int max_length, u8int *data);
 	bool write(FileNode* file, u64int position, u32int length, u8int *data);
 	bool truncate(FileNode* file);
diff --git a/Source/Kernel/FileSystems/RamFS/RamFileNode.class.h b/Source/Kernel/FileSystems/RamFS/RamFileNode.class.h
index d600630..2abad64 100644
--- a/Source/Kernel/FileSystems/RamFS/RamFileNode.class.h
+++ b/Source/Kernel/FileSystems/RamFS/RamFileNode.class.h
@@ -11,6 +11,8 @@ class RamFileNode : public FileNode {
 			u32int uid = 0, u32int gid = 0) :
 		FileNode(name, fs, parent, 0, permissions, uid, gid), m_data(0) {}
 
+	~RamFileNode() { if (m_data != 0) delete m_data; }
+
 	u8int *m_data;		//We don't take care of allocation/freeing here, RamFS:: does that for us
 
 	void setLength(u32int length) { m_length = length; }
diff --git a/Source/Kernel/Linker/ElfBinary.class.cpp b/Source/Kernel/Linker/ElfBinary.class.cpp
index 27e5474..0518c38 100644
--- a/Source/Kernel/Linker/ElfBinary.class.cpp
+++ b/Source/Kernel/Linker/ElfBinary.class.cpp
@@ -9,7 +9,7 @@ ElfBinary::~ElfBinary() {
 
 Binary* ElfBinary::load(File& file) {
 	elf_ehdr_t hdr;
-	file.read<elf_ehdr_t> (&hdr);
+	if (!file.read<elf_ehdr_t> (&hdr)) return 0;
 	//Verify we have an elf file
 	if (hdr.e_ident[0] != 0x7F or hdr.e_ident[1] != 'E' or hdr.e_ident[2] != 'L' or hdr.e_ident[3] != 'F') return 0;
 
diff --git a/Source/Kernel/Linker/MelonBinary.class.cpp b/Source/Kernel/Linker/MelonBinary.class.cpp
index 0737b71..8a85977 100644
--- a/Source/Kernel/Linker/MelonBinary.class.cpp
+++ b/Source/Kernel/Linker/MelonBinary.class.cpp
@@ -2,7 +2,7 @@
 
 Binary* MelonBinary::load(File& file) {
 	u32int magic;
-	file.read<u32int>(&magic);
+	if (!file.read<u32int>(&magic)) return 0;
 	if (magic == 0xFEEDBEEF) {
 		MelonBinary* r = new MelonBinary;
 		file.read<u32int>(&r->m_size);
diff --git a/Source/Kernel/Makefile b/Source/Kernel/Makefile
index a70c8c5..2005cd2 100644
--- a/Source/Kernel/Makefile
+++ b/Source/Kernel/Makefile
@@ -66,6 +66,7 @@ Objects = Core/loader.wtf.o \
 		VFS/DirectoryNode.class.o \
 		UserManager/Usr.ns.o \
 		FileSystems/RamFS/RamFS.class.o \
+		FileSystems/FAT/FATFS.class.o \
 		SyscallManager/IDT.ns.o \
 		SyscallManager/Ressource.class.o \
 		SyscallManager/Res.ns.o \
diff --git a/Source/Kernel/Shell/KernelShell-fs.class.cpp b/Source/Kernel/Shell/KernelShell-fs.class.cpp
index fa2078d..c389d45 100644
--- a/Source/Kernel/Shell/KernelShell-fs.class.cpp
+++ b/Source/Kernel/Shell/KernelShell-fs.class.cpp
@@ -125,3 +125,21 @@ void KernelShell::run(Vector<String>& args) {
 		}
 	}
 }
+
+void KernelShell::hexdump(Vector<String>& args) {
+	if (args.size() == 1) {
+		*m_vt << "No file to hexdump.\n";
+	} else {
+		for (u32int i = 1; i < args.size(); i++) {
+			File f(args[i], FM_READ, m_cwd);
+			if (f.valid()) {
+				u8int *buff = (u8int*)Mem::alloc(f.length());
+				f.read(f.length(), buff);
+				m_vt->hexDump(buff, f.length());
+				Mem::free(buff);
+			} else {
+				*m_vt << "Error reading from file " << args[i] << "\n";
+			}
+		}
+	}
+}
diff --git a/Source/Kernel/Shell/KernelShell-sys.class.cpp b/Source/Kernel/Shell/KernelShell-sys.class.cpp
index 6243b0f..06af11d 100644
--- a/Source/Kernel/Shell/KernelShell-sys.class.cpp
+++ b/Source/Kernel/Shell/KernelShell-sys.class.cpp
@@ -4,6 +4,8 @@
 #include <MemoryManager/Mem.ns.h>
 #include <MemoryManager/PhysMem.ns.h>
 #include <VFS/Part.ns.h>
+#include <VFS/VFS.ns.h>
+#include <FileSystems/RamFS/RamFS.class.h>
 
 void KernelShell::devices(Vector<String>& args) {
 	Vector<Device*> dev = Dev::findDevices();
@@ -58,3 +60,42 @@ void KernelShell::part(Vector<String>& args) {
 		}
 	}
 }
+
+void KernelShell::mount(Vector<String>& args) {
+	if (args.size() == 1) {
+		for (u32int i = 0; i < VFS::filesystems.size(); i++) {
+			*m_vt << VFS::filesystems[i]->getDevDescription() << " on " << VFS::path(VFS::filesystems[i]->getRootNode()) << "\n";
+		}
+	} else if (args.size() == 2) {
+		if (args[1] == "help") {
+			*m_vt << "Usage: mount [help|<options>]\n" <<
+				"Options formats :\n" << 
+				" - <mountpoint>:ramfs\n" <<
+				" - <mountpoint>:[<dev_class>]:<dev_number>:<part_number>[:<type>[:[ro|rw]]]\n" <<
+				"You can have a list of available block devices and partitions by typing 'part'.\n";
+		} else {
+			if (VFS::mount(args[1], m_vt)) *m_vt << "Ok, filesystem mounted.\n";
+		}
+	} else {
+		*m_vt << "Usage: mount [<device> <mountpoint>\n";
+	}
+}
+
+void KernelShell::readblock(Vector<String>& args) {
+	if (args.size() == 3) {
+		Vector<Device*> devcs = Dev::findDevices("block");
+		u32int id = args[1].toInt(), block = args[2].toInt();
+		if (id < devcs.size()) {
+			BlockDevice* bdev = (BlockDevice*)devcs[id];
+			*m_vt << "Block " << block << " from device " << bdev->getName() << " (" << bdev->getClass() << ")\n";
+			u8int* buff = (u8int*)Mem::alloc(bdev->blockSize());
+			bdev->readBlocks(block, 1, buff);
+			m_vt->hexDump(buff, 32);
+			Mem::free(buff);
+		} else {
+			*m_vt << "Block device #" << id << " does not exist.\n";
+		}
+	} else {
+		*m_vt << "Usage: readblock <dev id> <block id>\n";
+	}
+}
diff --git a/Source/Kernel/Shell/KernelShell.class.cpp b/Source/Kernel/Shell/KernelShell.class.cpp
index d62d822..71a717a 100644
--- a/Source/Kernel/Shell/KernelShell.class.cpp
+++ b/Source/Kernel/Shell/KernelShell.class.cpp
@@ -3,8 +3,8 @@
 #include <DeviceManager/Kbd.ns.h>
 #include <SimpleList.class.h>
 #include <MemoryManager/PhysMem.ns.h>
-#include <VFS/VFS.ns.h>
 #include <TaskManager/Task.ns.h>
+#include <VFS/VFS.ns.h>
 
 u32int KernelShell::m_instances = 0;
 
@@ -60,6 +60,9 @@ u32int KernelShell::run() {
 		{"free", &KernelShell::free},
 		{"uptime", &KernelShell::uptime},
 		{"part", &KernelShell::part},
+		{"readblock", &KernelShell::readblock},
+		{"mount", &KernelShell::mount},
+		{"hexdump", &KernelShell::hexdump},
 
 		{0, 0}
 	};
@@ -81,6 +84,9 @@ u32int KernelShell::run() {
 			*m_vt << "  - free       shows memory usage (frames and kheap)\n";
 			*m_vt << "  - uptime     shows seconds since boot\n";
 			*m_vt << "  - part       shows all detected block devs and partitions\n";
+			*m_vt << "  - mount      shows mounted devices or mounts a ramfs\n";
+			*m_vt << "  - readblock  reads a block from a block device and dumps it\n";
+			*m_vt << "  - hexdump    shows a hexadecimal dump of a file\n";
 			*m_vt << "  - Standard UNIX commands : ls cd cat pwd rm mkdir wf\n";
 			*m_vt << " - Scroll up with shift+pgup !\n";
 		} else if (tokens[0] == "reboot") {
@@ -92,6 +98,26 @@ u32int KernelShell::run() {
 		} else if (tokens[0] == "exit") {
 			if (tokens.size() == 1) return 0;
 			return tokens[1].toInt();
+		} else if (tokens[0] == "unmount") {
+			if (tokens.size() == 2) {
+				FSNode* n = VFS::find(tokens[1], m_cwd);
+				bool ok = false;
+				if (n == 0) {
+					ok = false;
+				} else {
+					String p = VFS::path(n);
+					for (u32int i = 0; i < VFS::filesystems.size(); i++) {
+						if (VFS::path(VFS::filesystems[i]->getRootNode()) == p) {
+							ok = VFS::unmount(VFS::filesystems[i]);
+							break;
+						}
+					}
+				}
+				if (ok) *m_vt << "Ok, filesystem unmounted.\n";
+				else *m_vt << "Error.\n";
+			} else {
+				*m_vt << "Usage: unmount <mountpoint>\n";
+			}
 		} else if (tokens[0] != "" or tokens.size() != 1) {
 			u32int i = 0;
 			bool found = false;
diff --git a/Source/Kernel/Shell/KernelShell.class.h b/Source/Kernel/Shell/KernelShell.class.h
index e7549c2..9655def 100644
--- a/Source/Kernel/Shell/KernelShell.class.h
+++ b/Source/Kernel/Shell/KernelShell.class.h
@@ -27,6 +27,7 @@ class KernelShell {
 	void rm(Vector<String>& args);
 	void wf(Vector<String>& args);
 	void run(Vector<String>& args);
+	void hexdump(Vector<String>& args);
 
 	//in KernelShell-sys
 	void devices(Vector<String>& args);
@@ -34,6 +35,8 @@ class KernelShell {
 	void free(Vector<String>& args);
 	void uptime(Vector<String>& args);
 	void part(Vector<String>& args);
+	void readblock(Vector<String>& args);
+	void mount(Vector<String>& args);
 
 	void setup(DirectoryNode* cwd, VirtualTerminal *vt);
 
diff --git a/Source/Kernel/UserManager/Usr.ns.cpp b/Source/Kernel/UserManager/Usr.ns.cpp
index ecf9bae..66e159e 100644
--- a/Source/Kernel/UserManager/Usr.ns.cpp
+++ b/Source/Kernel/UserManager/Usr.ns.cpp
@@ -26,11 +26,13 @@ void load() {
 	if (VFS::find("/System/Configuration/Groups")) VFS::find("/System/Configuration/Groups")->setPermissions(0600);
 	if (VFS::find("/System/Configuration/Users")) VFS::find("/System/Configuration/Users")->setPermissions(0600);
 	TextFile groups("/System/Configuration/Groups", FM_READ);
-	while (!groups.eof()) {
-		String s = groups.readLine();
-		Vector<String> data = s.split(":");
-		if (data.size() == 2 and !(s[0] == WChar("#"))) {
-			m_groups = m_groups->cons(Group(data[1], data[0].toInt()));
+	if (groups.valid()) {
+		while (!groups.eof()) {
+			String s = groups.readLine();
+			Vector<String> data = s.split(":");
+			if (data.size() == 2 and !(s[0] == WChar("#"))) {
+				m_groups = m_groups->cons(Group(data[1], data[0].toInt()));
+			}
 		}
 	}
 	if (m_groups == 0) {
@@ -39,12 +41,14 @@ void load() {
 	}
 
 	TextFile users("/System/Configuration/Users", FM_READ);
-	while (!users.eof()) {
-		String s = users.readLine();
-		if (s == "" or s[0] == WChar("#")) continue;
-		Vector<String> data = s.split(":");
-		if (data.size() == 6) {
-			m_users = m_users->cons(User(data[1], data[4], data[5], group(data[2].toInt()), data[3], data[0].toInt()));
+	if (users.valid()) {
+		while (!users.eof()) {
+			String s = users.readLine();
+			if (s == "" or s[0] == WChar("#")) continue;
+			Vector<String> data = s.split(":");
+			if (data.size() == 6) {
+				m_users = m_users->cons(User(data[1], data[4], data[5], group(data[2].toInt()), data[3], data[0].toInt()));
+			}
 		}
 	}
 	if (m_users == 0) {
diff --git a/Source/Kernel/VFS/BlockCache.class.cpp b/Source/Kernel/VFS/BlockCache.class.cpp
new file mode 100644
index 0000000..d505a99
--- /dev/null
+++ b/Source/Kernel/VFS/BlockCache.class.cpp
@@ -0,0 +1,89 @@
+#include <DeviceManager/Time.ns.h>
+
+template <typename T>
+BlockCache<T>::BlockCache(T* dev) {
+	m_dev = dev;
+	m_count = 0;
+}
+
+template <typename T>
+BlockCache<T>::~BlockCache() {
+	sync();
+	m_count = 0;
+	delete m_cache;
+	delete m_cacheInfo;
+}
+
+template <typename T>
+void BlockCache<T>::sync() {
+	for (u32int i = 0; i < m_count; i++) {
+		if (m_cacheInfo[i].dirty) m_dev->writeBlocks(m_cacheInfo[i].id, 1, m_cache + (i * m_dev->blockSize()));
+	}	
+}
+
+template <typename T>
+void BlockCache<T>::init(u32int count) {
+	m_count = count;
+	m_cacheInfo = new cached_block_t[count];
+	for (u32int i = 0; i < m_count; i++) {
+		m_cacheInfo[i].id = 0;
+		m_cacheInfo[i].lastuse = 0;
+		m_cacheInfo[i].dirty = false;
+	}
+	m_cache = (u8int*)Mem::alloc(m_count * m_dev->blockSize());
+}
+
+template <typename T>
+bool BlockCache<T>::setCache(u64int block, u8int* data, bool dirty) {
+	u32int best = 0;
+	for (u32int i = 0; i < m_count; i++) {
+		if (m_cacheInfo[i].id == block) {
+			best = i;
+			break;
+		}
+		if (m_cacheInfo[i].lastuse < m_cacheInfo[best].lastuse) best = i;
+	}
+	if (best >= m_count) return false;
+	if (m_cacheInfo[best].dirty && (m_cacheInfo[best].id != block or !dirty))
+	   m_dev->writeBlocks(m_cacheInfo[best].id, 1, m_cache + (best * m_dev->blockSize()));
+	m_cacheInfo[best].id = block;
+	m_cacheInfo[best].lastuse = Time::uptime();
+	m_cacheInfo[best].dirty = dirty;
+	memcpy(m_cache + (best * m_dev->blockSize()), data, m_dev->blockSize());
+	return true;
+}
+
+template <typename T>
+bool BlockCache<T>::getCache(u64int block, u8int* data) {
+	for (u32int i = 0; i < m_count; i++) {
+		if (m_cacheInfo[i].id == block && m_cacheInfo[i].lastuse != 0) {
+			m_cacheInfo[i].lastuse = Time::uptime();
+			memcpy(data, m_cache + (i * m_dev->blockSize()), m_dev->blockSize());
+			return true;
+		}
+	}
+	return false;
+}
+
+template <typename T>
+bool BlockCache<T>::readBlocks(u64int startblock, u32int count, u8int* data) {
+	if (count == 1) {
+		if (getCache(startblock, data)) return true;
+		if (!m_dev->readBlocks(startblock, count, data)) return false;
+		setCache(startblock, data);
+		return true;
+	} else {
+		return m_dev->readBlocks(startblock, count, data);
+	}
+}
+
+template <typename T>
+bool BlockCache<T>::writeBlocks(u64int startblock, u32int count, u8int* data) {
+	if (m_dev->readOnly()) return false;
+	if (count == 1) {
+		if (!setCache(startblock, data, true)) return m_dev->writeBlocks(startblock, count, data);
+		return true;
+	} else {
+		return m_dev->writeBlocks(startblock, count, data);
+	}
+}
diff --git a/Source/Kernel/VFS/BlockCache.class.h b/Source/Kernel/VFS/BlockCache.class.h
new file mode 100644
index 0000000..0b26180
--- /dev/null
+++ b/Source/Kernel/VFS/BlockCache.class.h
@@ -0,0 +1,32 @@
+#ifndef DEF_BLOCKCACHE_CLASS_H
+#define DEF_BLOCKCACHE_CLASS_H
+
+template <typename T>
+class BlockCache {
+	private:
+	T* m_dev;
+	u32int m_count;
+	struct cached_block_t {
+		u64int id;
+		u32int lastuse;
+		bool dirty;
+	} *m_cacheInfo;
+	u8int* m_cache;
+
+	void sync();
+	bool setCache(u64int block, u8int* data, bool dirty = false);
+	bool getCache(u64int block, u8int* data);
+
+	public:
+	BlockCache(T* dev);
+	~BlockCache();
+	void init(u32int count);
+
+	bool readBlocks(u64int startblock, u32int count, u8int* data);
+	bool writeBlocks(u64int startblock, u32int count, u8int* data);
+	
+};
+
+#include "BlockCache.class.cpp"
+
+#endif
diff --git a/Source/Kernel/VFS/DirectoryNode.class.cpp b/Source/Kernel/VFS/DirectoryNode.class.cpp
index 74c1ff8..55365f0 100644
--- a/Source/Kernel/VFS/DirectoryNode.class.cpp
+++ b/Source/Kernel/VFS/DirectoryNode.class.cpp
@@ -6,6 +6,15 @@ call_t DirectoryNode::m_callTable[] = {
 	CALL0(0, 0)
 };
 
+DirectoryNode::~DirectoryNode() {
+	if (m_contentLoaded) {
+		for (u32int i = 0; i < m_children.size(); i++) {
+			delete m_children[i];
+		}
+	}
+	if (m_name == "/" && m_parent != NULL) ((DirectoryNode*)(m_parent))->unmount();
+}
+
 u32int DirectoryNode::getIdxChildSC(u32int idx) {
 	if (!runnable()) return (u32int) - 1;
 	FSNode* n = getChild(idx);
@@ -21,15 +30,29 @@ u32int DirectoryNode::getNameChildSC(u32int name) {
 	return (u32int) - 1;
 }
 
+u64int DirectoryNode::getLength() {
+	if (m_mounts != 0) return m_mounts->getLength();
+	if (!m_contentLoaded)
+		if (!loadContent())
+			return 0;
+	return m_length;
+}
+
+FSNode* DirectoryNode::getParent() {
+	//if (m_name == "/" and m_parent != 0) return m_parent->getParent();
+	return m_parent;
+}
+
 bool DirectoryNode::removable() {
 	if (!m_contentLoaded)
 		if (!loadContent())
 			return false;
-	return m_children.empty();
+	return m_children.empty() && (m_mounts == 0);
 }
 
 bool DirectoryNode::unmountable() {
 	if (!m_contentLoaded) return true;
+	if (m_mounts != 0) return false;
 	for (u32int i = 0; i < m_children.size(); i++) {
 		if (m_children[i]->type() == NT_DIRECTORY) {
 			if (!((DirectoryNode*)m_children[i])->unmountable()) return false;
@@ -40,7 +63,22 @@ bool DirectoryNode::unmountable() {
 	return true;
 }
 
+bool DirectoryNode::mountpointable() {
+	if (!m_contentLoaded)
+		if (!loadContent()) return false;
+	return m_children.empty();
+}
+
+void DirectoryNode::mount(DirectoryNode* childRoot) {
+	m_mounts = childRoot;
+}
+
+void DirectoryNode::unmount() {
+	m_mounts = 0;
+}
+
 bool DirectoryNode::loadContent() {
+	if (m_mounts != 0) return m_mounts->loadContent();
 	if (m_contentLoaded) return true;
 	bool b = m_fs->loadContents(this);
 	if (!b) return false;
@@ -50,6 +88,7 @@ bool DirectoryNode::loadContent() {
 }
 
 FSNode* DirectoryNode::getChild(u32int index) {
+	if (m_mounts != 0) return m_mounts->getChild(index);
 	if (!m_contentLoaded)
 		if (!loadContent())
 			return NULL;
@@ -58,6 +97,7 @@ FSNode* DirectoryNode::getChild(u32int index) {
 }
 
 FSNode* DirectoryNode::getChild(const String& name) {
+	if (m_mounts != 0) return m_mounts->getChild(name);
 	if (!m_contentLoaded)
 		if (!loadContent())
 			return NULL;
@@ -69,18 +109,21 @@ FSNode* DirectoryNode::getChild(const String& name) {
 }
 
 FileNode* DirectoryNode::createFile(const String& name) {
+	if (m_mounts != 0) return m_mounts->createFile(name);
 	FileNode* n = m_fs->createFile(this, name);
 	m_length = m_children.size();
 	return n;
 }
 
 DirectoryNode* DirectoryNode::createDirectory(const String& name) {
+	if (m_mounts != 0) return m_mounts->createDirectory(name);
 	DirectoryNode* n = m_fs->createDirectory(this, name);
 	m_length = m_children.size();
 	return n;
 }
 
 bool DirectoryNode::remove(FSNode* child) {
+	if (m_mounts != 0) return m_mounts->remove(child);
 	//Check node is indeed one of our childs
 	if (!m_contentLoaded)
 		if (!loadContent())
diff --git a/Source/Kernel/VFS/DirectoryNode.class.h b/Source/Kernel/VFS/DirectoryNode.class.h
index 4d9b211..1fc4c52 100644
--- a/Source/Kernel/VFS/DirectoryNode.class.h
+++ b/Source/Kernel/VFS/DirectoryNode.class.h
@@ -8,6 +8,7 @@ class DirectoryNode : public FSNode {
 	protected:
 	Vector<FSNode*> m_children;
 	bool m_contentLoaded;
+	DirectoryNode* m_mounts;	//Root node of the filesystem mounted here, null if none
 
 	//Syscalls
 	static call_t m_callTable[];
@@ -19,20 +20,20 @@ class DirectoryNode : public FSNode {
 			u32int uid = 0, u32int gid = 0) : 
 			FSNode(name, fs, parent, 0, permissions, uid, gid), m_children(), m_contentLoaded(false) {
 		addCallTable(m_callTable);
+		m_mounts = 0;
 	}
-	virtual ~DirectoryNode() {
-		if (m_contentLoaded) {
-			for (u32int i = 0; i < m_children.size(); i++) {
-				delete m_children[i];
-			}
-		}
-	}
+	virtual ~DirectoryNode();
 
 	Vector<FSNode*> &getChildren() { return m_children; }	//MUST BE USED ONLY BY FILESYSTEMS
 
 	u8int type() { return NT_DIRECTORY; }
+	u64int getLength();
+	FSNode* getParent();
 	bool removable();
 	bool unmountable();
+	bool mountpointable();
+	void mount(DirectoryNode* childRoot);
+	void unmount();
 
 	bool loadContent();
 	FSNode* getChild(u32int index);
diff --git a/Source/Kernel/VFS/FSNode.proto.h b/Source/Kernel/VFS/FSNode.proto.h
index 0aafc8a..a46c79d 100644
--- a/Source/Kernel/VFS/FSNode.proto.h
+++ b/Source/Kernel/VFS/FSNode.proto.h
@@ -44,12 +44,12 @@ class FSNode : public Ressource {
 	virtual bool used() { return false; }	//True if file is read/written from/to
 	
 	const String& getName() { return m_name; }
-	u64int getLength() { return m_length; }
+	virtual u64int getLength() { return m_length; }
 	u32int getPermissions() { return m_permissions; }
 	u32int getUid() { return m_uid; }
 	u32int getGid() { return m_gid; }
 	FileSystem *getFS() { return m_fs; }
-	FSNode* getParent() { return m_parent; }
+	virtual FSNode* getParent() { return m_parent; }
 
 	//Helper functions
 	bool readable(User* user = 0);
diff --git a/Source/Kernel/VFS/File.class.cpp b/Source/Kernel/VFS/File.class.cpp
index c5ddcd6..84561a5 100644
--- a/Source/Kernel/VFS/File.class.cpp
+++ b/Source/Kernel/VFS/File.class.cpp
@@ -33,7 +33,7 @@ bool File::open(String filename, u8int mode, FSNode* start, bool vrfyperm) {
 	if (node == NULL){
 	   	if (mode == FM_READ) return false;
 		node = VFS::createFile(filename, start, vrfyperm);
-		if (node == 0) return false;
+		if (node == NULL) return false;
 	}
 	if (node->type() != NT_FILE) return false;
 
@@ -137,6 +137,7 @@ bool File::seek(u64int count, u8int mode) {
 }
 
 bool File::eof() {
+	if (!m_valid) return false;
 	return m_position == m_file->getLength();
 }
 
diff --git a/Source/Kernel/VFS/FileSystem.proto.h b/Source/Kernel/VFS/FileSystem.proto.h
index a614c13..9216219 100644
--- a/Source/Kernel/VFS/FileSystem.proto.h
+++ b/Source/Kernel/VFS/FileSystem.proto.h
@@ -5,20 +5,29 @@
 class FSNode;
 class FileNode;
 class DirectoryNode;
+class FileSystem;
+
+namespace VFS {
+	bool unmount(FileSystem*);
+}
 
 //This abstract class describes a filesystem
 class FileSystem {
+	friend bool VFS::unmount(FileSystem*);
+
 	protected:
-	virtual ~FileSystem() {}
+	virtual ~FileSystem();
 	bool m_isWritable;	//false = read only
 	DirectoryNode* m_rootNode;
 
-	public:
-	bool unmount();
+	virtual bool unmount() = 0;	//Sync data with the disk
 
+	public:
 	bool isWritable() { return m_isWritable; }
 	DirectoryNode* getRootNode() { return m_rootNode; }
 
+	virtual String getDevDescription() = 0;
+
 	//Must be implemented by the filesystem
 	virtual bool setName(FSNode* node, String name) = 0;
 	virtual bool setPermissions(FSNode* node, u32int permissions) = 0;
diff --git a/Source/Kernel/VFS/Part.ns.cpp b/Source/Kernel/VFS/Part.ns.cpp
index 6408dbd..9ead6b5 100644
--- a/Source/Kernel/VFS/Part.ns.cpp
+++ b/Source/Kernel/VFS/Part.ns.cpp
@@ -56,4 +56,36 @@ u32int getDeviceID(BlockDevice* dev) {
 	return (u32int) - 1;
 }
 
+BlockDevice* dev(String _class, u32int idx) {
+	if (_class.empty()) return devices[idx];
+	for (u32int i = 0; i < devices.size(); i++) {
+		String devclass = devices[i]->getClass();
+		if (devclass == _class or (devclass.size() > _class.size() and devclass.substr(0, _class.size()) == _class)) {
+			if (idx == 0) {
+				return devices[i];
+			} else {
+				idx--;
+			}
+		}
+	}
+	return NULL;
+}
+
+Partition* part(BlockDevice* dev, u32int idx) {
+	for (u32int i = 0; i < partitions.size(); i++) {
+		if (partitions[i]->getDevice() == dev) {
+			if (idx == 0) {
+				return partitions[i];
+			} else {
+				idx--;
+			}
+		}
+	}
+	return NULL;
+}
+
+String partIdentifier(Partition* p) {
+	return String("d") += String::number(getDeviceID(p->getDevice())) += String("p") += String::number(p->getPartNumber());
+}
+
 }
diff --git a/Source/Kernel/VFS/Part.ns.h b/Source/Kernel/VFS/Part.ns.h
index 40a0fb2..992f6f3 100644
--- a/Source/Kernel/VFS/Part.ns.h
+++ b/Source/Kernel/VFS/Part.ns.h
@@ -13,6 +13,11 @@ namespace Part {
 	void unregisterDevice(BlockDevice* dev);
 
 	u32int getDeviceID(BlockDevice* dev);
+
+	BlockDevice* dev(String _class, u32int idx);
+	Partition* part(BlockDevice* dev, u32int idx);
+
+	String partIdentifier(Partition* p);	//Simply to help recognize the partition
 }
 
 #endif
diff --git a/Source/Kernel/VFS/Partition.class.cpp b/Source/Kernel/VFS/Partition.class.cpp
index b62f33c..8d7de9b 100644
--- a/Source/Kernel/VFS/Partition.class.cpp
+++ b/Source/Kernel/VFS/Partition.class.cpp
@@ -2,21 +2,23 @@
 
 using namespace CMem;	//For memcpy
 
-Partition::Partition(BlockDevice* dev, u8int partnumber, u64int startblock, u64int blockcount) {
+Partition::Partition(BlockDevice* dev, u8int partnumber, u64int startblock, u64int blockcount)
+: m_cache(dev) {
 	m_device = dev;
 	m_partnumber = partnumber;
 	m_startblock = startblock;
 	m_blockcount = blockcount;
+	m_cache.init(10 + (m_device->blocks() / 1000 > 100 ? 100 : m_device->blocks() / 1000));
 }
 
 bool Partition::readBlocks(u64int startblock, u32int count, u8int *data) {
 	if (startblock + count > m_startblock + m_blockcount) return false;
-	return m_device->readBlocks(startblock - m_startblock, count, data);
+	return m_cache.readBlocks(startblock - m_startblock, count, data);
 }
 
 bool Partition::writeBlocks(u64int startblock, u32int count, u8int *data) {
 	if (startblock + count > m_startblock + m_blockcount) return false;
-	return m_device->writeBlocks(startblock - m_startblock, count, data);
+	return m_cache.writeBlocks(startblock - m_startblock, count, data);
 }
 
 bool Partition::read(u64int start, u32int length, u8int *data) {
@@ -65,4 +67,4 @@ BlockDevice* Partition::getDevice() { return m_device; }
 u64int Partition::getStartBlock() { return m_startblock; }
 u64int Partition::getBlockCount() { return m_blockcount; }
 u8int Partition::getPartNumber() { return m_partnumber; }
-u32int Partition::getBlockSize() { return m_device->blockSize(); }
+u32int Partition::blockSize() { return m_device->blockSize(); }
diff --git a/Source/Kernel/VFS/Partition.class.h b/Source/Kernel/VFS/Partition.class.h
index 8df1c4f..eb0aafd 100644
--- a/Source/Kernel/VFS/Partition.class.h
+++ b/Source/Kernel/VFS/Partition.class.h
@@ -2,10 +2,12 @@
 #define DEF_PARTITION_CLASS_H
 
 #include <Devices/BlockDevice.proto.h>
+#include <VFS/BlockCache.class.h>
 
 class Partition {
 	private:
 	BlockDevice* m_device;
+	BlockCache<BlockDevice> m_cache;
 	u64int m_startblock, m_blockcount;
 	u8int m_partnumber;	//Partition number in partition table of device
 
@@ -24,7 +26,7 @@ class Partition {
 	u64int getStartBlock();
 	u64int getBlockCount();
 	u8int getPartNumber();
-	u32int getBlockSize();
+	u32int blockSize();
 	inline u64int blocks() { return getBlockCount(); }
 };
 
diff --git a/Source/Kernel/VFS/VFS.ns.cpp b/Source/Kernel/VFS/VFS.ns.cpp
index e95b911..3b59c5a 100644
--- a/Source/Kernel/VFS/VFS.ns.cpp
+++ b/Source/Kernel/VFS/VFS.ns.cpp
@@ -1,19 +1,114 @@
 #include "VFS.ns.h"
 #include <VFS/FileNode.class.h>
+#include <Vector.class.h>
+#include <VTManager/VirtualTerminal.proto.h>
+
+#include <VFS/Part.ns.h>
+#include <FileSystems/RamFS/RamFS.class.h>
+#include <FileSystems/FAT/FATFS.class.h>
+
+struct local_fs_t {
+	const char* name;
+	mount_callback_t cb;
+} fileSystems[] = {
+	{"fat", FATFS::mount},
+	{0, 0}
+};
+
+FileSystem::~FileSystem() { delete m_rootNode; }
 
 namespace VFS {
 
-DirectoryNode *rootNode;
+DirectoryNode *rootNode = 0;
+Vector<FileSystem*> filesystems;
+
+DirectoryNode* getRootNode() {
+	return rootNode;
+}
+
+void registerFilesystem(FileSystem* fs) {
+	unregisterFilesystem(fs);
+	filesystems.push(fs);
+	if (rootNode == 0) rootNode = fs->getRootNode();
+}
 
-//TODO : mount stuff
+void unregisterFilesystem(FileSystem* fs) {
+	for (u32int i = 0; i < filesystems.size(); i++) {
+		if (filesystems[i] == fs) {
+			filesystems[i] = filesystems.back();
+			filesystems.pop();
+			break;
+		}
+	}
+}
 
-bool setRootNode(DirectoryNode* node) {
-	rootNode = node;
+bool unmount(FileSystem* fs) {
+	if (!fs->getRootNode()->unmountable()) return false;
+	if (fs->getRootNode() == rootNode) return false;
+	if (!fs->unmount()) return false;
+	delete fs;	//Will automatically delete the root node (destructor is in this file);
 	return true;
 }
 
-DirectoryNode* getRootNode() {
-	return rootNode;
+bool mount(String str, VirtualTerminal* vt, multiboot_info_t *mbd) {
+	Vector<String> fs = str.split(":");
+	DirectoryNode* root;
+	if (fs[0] == "/") {
+		root = NULL;
+	} else {
+		FSNode* n = VFS::find(fs[0]);
+		if (n == NULL) {
+			*vt << "Mountpoint does not exist : " << fs[0] << "\n";
+			return false;
+		}
+		if (n->type() != NT_DIRECTORY) {
+			*vt << "Mountpoint is not a directory : " << fs[0] << "\n";
+			return false;
+		}
+		root = (DirectoryNode*)n;
+	}
+	if (fs[1] == "ramfs") {
+		if (fs.size() > 2) {
+			if (mbd != 0) {
+				module_t *mods = (module_t*)mbd->mods_addr;
+				if (fs[2].toInt() >= mbd->mods_count) {
+					*vt << "Invalid module number for filesystem to mount on " << fs[0] << "\n";
+					return false;
+				}
+				RamFS::mount((u8int*)mods[fs[2].toInt()].mod_start, 1024 * 1024, root);
+				return true;
+			} else {
+				*vt << "Cannot mount kernel modules outside of kernel command line.\n";
+				return false;
+			}
+		} else {
+			RamFS::mount(1024 * 1024, root);
+			return true;
+		}
+	} else {
+		if (fs.size() < 4) {
+			*vt << "Syntax: <mountpoint>:[<dev_class>]:<dev_id>:<part_id>[:<fs_type>[:[ro|rw]]]\n";
+			return false;
+		}
+		if (fs.size() < 5) fs.push("");
+		if (fs.size() < 6) fs.push("ro");	//By default, mount file systems read-only
+		BlockDevice* d = Part::dev(fs[1], fs[2].toInt());
+		Partition* p = Part::part(d, fs[3].toInt());
+		for (u32int i = 0; fileSystems[i].cb != 0; i++) {
+			if (fs[4] == fileSystems[i].name or fs[4] == "") {
+				if (fileSystems[i].cb(p, root, (fs[5] == "rw")) != NULL) {
+					return true;
+				} else if (fs[4] != "") {
+					*vt << "Could not mount filesystem on " << fs[0] << "\n";
+					if (root == NULL) PANIC("Error while mounting root filesystem.");
+					return false;
+				}
+			}
+		}
+		*vt << "Unknown filesystem type for filesystem to mount on " << fs[0] << "\n";
+		if (root == NULL) PANIC("Unknown filesystem type for root file system.");
+		return false;
+	}
 }
 
 FSNode* find(const String& path, FSNode* start) {
diff --git a/Source/Kernel/VFS/VFS.ns.h b/Source/Kernel/VFS/VFS.ns.h
index f1d628f..eede728 100644
--- a/Source/Kernel/VFS/VFS.ns.h
+++ b/Source/Kernel/VFS/VFS.ns.h
@@ -1,17 +1,27 @@
 #ifndef DEF_VFS_NS_H
 #define DEF_VFS_NS_H
 
+#include <Core/multiboot.wtf.h>
+
 #include <VFS/DirectoryNode.class.h>
 #include <VFS/FileSystem.proto.h>
+#include <Vector.class.h>
 
-typedef FileSystem* (* mountcallback)(Partition* partition);
+typedef FileSystem* (* mount_callback_t)(Partition* partition, DirectoryNode* mountpoint, bool readwrite);
 
 namespace VFS {
-	void registerMountCallback(mountcallback mcb);
+	extern Vector<FileSystem*> filesystems;
+
+	void registerMountCallback(mount_callback_t mcb);
 	bool mount(Partition* partition, DirectoryNode *mountpoint);
-	bool setRootNode(DirectoryNode* root);
 	DirectoryNode* getRootNode();
 
+	void registerFilesystem(FileSystem* fs);
+	void unregisterFilesystem(FileSystem* fs);
+	bool unmount(FileSystem* fs);
+
+	bool mount(String str, VirtualTerminal* logvt, multiboot_info_t* mbd = 0);
+
 	FSNode* find(const String& path, FSNode* start = 0);
 	FSNode* createFile(const String& path, FSNode* start = 0, bool vrfyperm = false);
 	FSNode* createDirectory(const String& path, FSNode* start = 0, bool vrfyperm = false);