Import dnbd* from the former openslx-contrib repo as of revision 92.

openslx-contrib is currently read only and will get removed in some
days.


git-svn-id: http://svn.openslx.org/svn/openslx/contrib/dnbd/trunk@1592 95ad53e4-c205-0410-b2fa-d234c58c8868

2 files changed, 121 insertions, 0 deletions

diff --git a/common/dnbd-cliserv.h b/common/dnbd-cliserv.h
new file mode 100644
index 0000000..cf96767
--- /dev/null
+++ b/common/dnbd-cliserv.h
@@ -0,0 +1,103 @@
+#ifndef LINUX_DNBD_CLISERV_H
+#define LINUX_DNBD_CLISERV_H	1
+
+#ifndef MODULE
+#include <stdint.h>
+#endif
+
+#ifdef DNBD_USERSPACE
+#include <bits/types.h>
+#include <netinet/in.h>
+#include <endian.h>
+#include <byteswap.h>
+
+/* host byte order <-> network byte order */
+#if __BYTE_ORDER == __BIG_ENDIAN
+#define ntohll(x) (x)
+#else
+#define ntohll(x) bswap_64(x)
+#endif
+
+#else
+#include <linux/in.h>
+#endif
+
+#include <linux/types.h>
+
+/* some constants */
+#define		DNBD_VERSION		"0.9.0"
+#define		DNBD_PORT		5001
+#define		DNBD_MAGIC		0x19051979
+#define 	DNBD_MAJOR 		0
+#define		DNBD_UIDLEN		20
+
+/* states */
+#define	DNBD_STATE_LOADED	1<<0
+#define DNBD_STATE_CONFIGURED	1<<1
+#define DNBD_STATE_RUNNING	1<<2
+
+/* define ioctls */
+#define DNBD_IOCTL_TYPE		0xac
+#define DNBD_SET_SOCK		_IO( DNBD_IOCTL_TYPE, 0)
+#define DNBD_SET_GROUPNET	_IO( DNBD_IOCTL_TYPE, 1)
+#define DNBD_SET_BLKSIZE	_IO( DNBD_IOCTL_TYPE, 2)
+#define DNBD_SET_CAPACITY	_IO( DNBD_IOCTL_TYPE, 3)
+#define DNBD_SET_SERVERID	_IO( DNBD_IOCTL_TYPE, 4)
+#define DNBD_SET_CACHE		_IO( DNBD_IOCTL_TYPE, 5)
+#define DNBD_DO_IT		_IO( DNBD_IOCTL_TYPE, 6)
+#define DNBD_DISCONNECT		_IO( DNBD_IOCTL_TYPE, 7)
+
+/* define communication between server and client */
+#define DNBD_CMD_MASK		0x07
+#define DNBD_CMD_INIT		0x01
+#define DNBD_CMD_READ		0x02
+#define DNBD_CMD_HB		0x03
+
+#define DNBD_CMD_CLI		0x08
+#define DNBD_CMD_SRV		0x10
+
+#define DNBD_TMR_OUT		0x0a
+
+/* do not allign variables to 32bit etc.*/
+#pragma pack(1) 
+struct dnbd_request {
+	uint32_t magic;
+	uint16_t id;
+	uint16_t cmd;
+	uint64_t pos;
+	uint16_t time;
+	uint16_t len;
+};
+#pragma pack()
+
+#pragma pack(1)
+struct dnbd_reply {
+	uint32_t magic;
+	uint16_t id;
+	uint16_t cmd;
+	uint64_t pos;
+	uint16_t time;
+};
+#pragma pack()
+
+#pragma pack(1)
+struct dnbd_reply_init {
+	uint32_t magic;
+	uint16_t id;
+	uint16_t cmd;
+	uint64_t capacity;
+	uint16_t time;
+	uint16_t blksize;	
+};
+#pragma pack()
+
+typedef struct dnbd_reply dnbd_reply_t;
+typedef struct dnbd_reply_init dnbd_reply_init_t;
+typedef struct dnbd_request dnbd_request_t;
+	
+struct dnbd_file {
+	const char *name;
+	int len;
+};
+
+#endif /* LINUX_DNBD_CLISERV_H */
diff --git a/common/dnbd.h b/common/dnbd.h
new file mode 100644
index 0000000..eb8de33
--- /dev/null
+++ b/common/dnbd.h
@@ -0,0 +1,18 @@
+#define DNBD_MAJOR 43
+#define MAX_DNBD 32
+
+struct dnbd_device {
+	int flags;
+	int harderror;		/* Code of hard error			*/
+	struct socket * sock;
+	struct file * file; 	/* If == NULL, device is not ready, yet	*/
+	int magic;
+	spinlock_t queue_lock;
+	struct list_head queue_head;/* Requests are added here...	*/
+	struct semaphore tx_lock;
+	struct gendisk *disk;
+	int blksize;
+	u64 bytesize;
+};
+
+typedef struct dnbd_device dnbd_device_t;