From b7fd7219ce4fc73939c912d4a02f5b8e4301ede7 Mon Sep 17 00:00:00 2001
From: Johann Latocha
Date: Thu, 19 Jan 2012 17:20:02 +0100
Subject: First working version :)

---
 src/kernel/core.c | 94 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 src/kernel/core.c

(limited to 'src/kernel/core.c')

diff --git a/src/kernel/core.c b/src/kernel/core.c
new file mode 100644
index 0000000..3b6ce54
--- /dev/null
+++ b/src/kernel/core.c
@@ -0,0 +1,94 @@
+/*
+ * This file is part of the Distributed Network Block Device 3
+ *
+ * Copyright(c) 2011-2012 Johann Latocha <johann@latocha.de>
+ *
+ * This file may be licensed under the terms of of the
+ * GNU General Public License Version 2 (the ``GPL'').
+ *
+ * Software distributed under the License is distributed
+ * on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
+ * express or implied. See the GPL for the specific language
+ * governing rights and limitations.
+ *
+ * You should have received a copy of the GPL along with this
+ * program. If not, go to http://www.gnu.org/licenses/gpl.html
+ * or write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "dnbd3.h"
+#include "blk.h"
+
+// block
+int major;
+struct gendisk *disk;
+struct request_queue *dnbd3_queue;
+spinlock_t dnbd3_lock;
+
+// network
+char* _host;
+char* _port;
+struct socket *_sock;
+
+// process
+wait_queue_head_t _process_queue_send;
+wait_queue_head_t _process_queue_receive;
+struct list_head _request_queue_send;
+struct list_head _request_queue_receive;
+
+static int __init dnbd3_init(void)
+{
+	// initialize queues
+	init_waitqueue_head(&_process_queue_send);
+	init_waitqueue_head(&_process_queue_receive);
+	INIT_LIST_HEAD(&_request_queue_send);
+	INIT_LIST_HEAD(&_request_queue_receive);
+
+	// initialize block device
+	if ((major = register_blkdev(0, "dnbd")) == 0)
+	{
+		printk("ERROR: dnbd3 register_blkdev failed.\n");
+		return -EIO;
+	}
+	if (!(disk = alloc_disk(1)))
+	{
+		printk("ERROR: dnbd3 alloc_disk failed.\n");
+		return -EIO;
+	}
+	disk->major = major;
+	disk->first_minor = 0;
+	sprintf(disk->disk_name, "dnbd0");
+	set_capacity(disk, 0);
+	set_disk_ro(disk, 1);
+	disk->fops = &dnbd3_blk_ops;
+	spin_lock_init(&dnbd3_lock);
+	if ((dnbd3_queue = blk_init_queue(&dnbd3_blk_request, &dnbd3_lock)) == NULL)
+	{
+		printk("ERROR: dnbd3 blk_init_queue failed.\n");
+		return -EIO;
+	}
+	blk_queue_logical_block_size(dnbd3_queue, DNBD3_BLOCK_SIZE);
+	disk->queue = dnbd3_queue;
+
+	add_disk(disk); // must be last
+
+	printk("INFO: dnbd3 init successful.\n");
+	return 0;
+}
+
+static void __exit dnbd3_exit(void)
+{
+	if (_sock)
+		sock_release(_sock);
+	unregister_blkdev(major, "dnbd");
+	del_gendisk(disk);
+	put_disk(disk);
+	blk_cleanup_queue(dnbd3_queue);
+	printk("INFO: dnbd3 exit.\n");
+}
+
+module_init( dnbd3_init);
+module_exit( dnbd3_exit);
+MODULE_LICENSE("GPL");
-- 
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