From 02981ccf1ab7040162fee0baf54c85dcab035a0c Mon Sep 17 00:00:00 2001
From: =?utf8?q?T=C3=BAlio=20Magno=20Quites=20Machado=20Filho?=
 <tuliom@gmail.com>
Date: Wed, 11 Jun 2008 23:54:37 -0300
Subject: [PATCH] Initial code for the module.

---
 .gitignore          |  6 +++++
 src/driver/Makefile |  9 +++++++
 src/driver/vdi.c    | 78 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/driver/vdi.h    | 33 +++++++++++++++++++++++
 4 files changed, 126 insertions(+)
 create mode 100644 src/driver/Makefile
 create mode 100644 src/driver/vdi.c
 create mode 100644 src/driver/vdi.h

diff --git a/.gitignore b/.gitignore
index 9298f33..a32f44a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,4 +2,10 @@
 *.vdi
 tstVDI
 obj/*
+*.mod
+*.cmd
+*.ko
+*.mod.c
+*.mod.o
+*.symvers
 
diff --git a/src/driver/Makefile b/src/driver/Makefile
new file mode 100644
index 0000000..ea0ec83
--- /dev/null
+++ b/src/driver/Makefile
@@ -0,0 +1,9 @@
+ifneq ($(KERNELRELEASE),)
+	obj-m := vdi.o
+else
+	KERNELDIR ?= /lib/modules/$(shell uname -r)/build
+	PWD := $(shell pwd)
+
+default:
+	$(MAKE) -C $(KERNELDIR) M=$(PWD) modules
+endif
diff --git a/src/driver/vdi.c b/src/driver/vdi.c
new file mode 100644
index 0000000..d16411d
--- /dev/null
+++ b/src/driver/vdi.c
@@ -0,0 +1,78 @@
+/*
+ * vdi.h - The driver for virtual disks of VirtualBox
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __KERNEL__
+#  define __KERNEL__
+#endif
+#ifndef MODULE
+#  define MODULE
+#endif
+
+//#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/blkdev.h>
+
+static int vdi_major;
+
+#include "vdi.h"
+
+
+/*
+ *
+ */
+static int major    = VDI_MAJOR;
+static int devs     = 0;
+static int rahead   = 0;
+static int size     = 0;
+static int blksize  = 1024;
+
+int vdi_devs, vdi_ra;
+
+static int vdi_init(void)
+{
+	int result;
+//	printk(KERN_ALERT "Starting VDI driver.\n");
+
+	// Register the VDI
+	result = register_blkdev(major, "vdi");
+	if (result < 0)
+	{
+		printk(KERN_WARNING "vdi: cannot get major %d\n", vdi_major);
+		return result;
+	}
+	// Set dynamic number
+	if (vdi_major == 0)
+	{
+		vdi_major = result;
+	}
+	major = vdi_major;
+	
+	
+
+	return 0;
+}
+
+static void vdi_exit(void)
+{
+	//printk(KERN_ALERT "Exiting VDI driver.\n");
+
+	// Unregister device
+	unregister_blkdev(major, "vdi");
+}
+
+module_init(vdi_init);
+module_exit(vdi_exit); 
diff --git a/src/driver/vdi.h b/src/driver/vdi.h
new file mode 100644
index 0000000..6edcc56
--- /dev/null
+++ b/src/driver/vdi.h
@@ -0,0 +1,33 @@
+/*
+ * vdi.h - The driver for virtual disks of VirtualBox
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef ___vdi_h
+#define ___vdi_h
+
+#define VDI_MAJOR 0
+
+struct vdi {
+	int size;			// Device size
+	u8 *data;			// Pointer to the data array
+	short users;			// Number of users
+	short media_change		// Flag for media change
+	spinlock_t lock;		// Mutual exclusion
+	struct request_queue *queue;	// Device request queue
+	struct gendisk *gd;		// gendisk structure
+}
+
+#endif
-- 
2.11.4.GIT