diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h
new file mode 100644
index 0000000..830700a
--- /dev/null
+++ b/include/scsi/libiscsi.h
@@ -0,0 +1,286 @@
+/*
+ * iSCSI lib definitions
+ *
+ * Copyright (C) 2006 Red Hat, Inc.  All rights reserved.
+ * Copyright (C) 2004 - 2006 Mike Christie
+ * Copyright (C) 2004 - 2005 Dmitry Yusupov
+ * Copyright (C) 2004 - 2005 Alex Aizman
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+#ifndef LIBISCSI_H
+#define LIBISCSI_H
+
+#include <linux/types.h>
+#include <linux/mutex.h>
+#include <scsi/iscsi_proto.h>
+#include <scsi/iscsi_if.h>
+
+struct scsi_transport_template;
+struct scsi_device;
+struct Scsi_Host;
+struct scsi_cmnd;
+struct socket;
+struct iscsi_transport;
+struct iscsi_cls_session;
+struct iscsi_cls_conn;
+struct iscsi_session;
+struct iscsi_nopin;
+
+/* #define DEBUG_SCSI */
+#ifdef DEBUG_SCSI
+#define debug_scsi(fmt...) printk(KERN_INFO "scsi: " fmt)
+#else
+#define debug_scsi(fmt...)
+#endif
+
+#define ISCSI_XMIT_CMDS_MAX	128	/* must be power of 2 */
+#define ISCSI_MGMT_CMDS_MAX	32	/* must be power of 2 */
+#define ISCSI_CONN_MAX			1
+
+#define ISCSI_MGMT_ITT_OFFSET	0xa00
+
+#define ISCSI_DEF_CMD_PER_LUN		32
+#define ISCSI_MAX_CMD_PER_LUN		128
+
+/* Task Mgmt states */
+#define TMABORT_INITIAL			0x0
+#define TMABORT_SUCCESS			0x1
+#define TMABORT_FAILED			0x2
+#define TMABORT_TIMEDOUT		0x3
+
+/* Connection suspend "bit" */
+#define ISCSI_SUSPEND_BIT		1
+
+#define ISCSI_ITT_MASK			(0xfff)
+#define ISCSI_CID_SHIFT			12
+#define ISCSI_CID_MASK			(0xffff << ISCSI_CID_SHIFT)
+#define ISCSI_AGE_SHIFT			28
+#define ISCSI_AGE_MASK			(0xf << ISCSI_AGE_SHIFT)
+
+struct iscsi_mgmt_task {
+	/*
+	 * Becuae LLDs allocate their hdr differently, this is a pointer to
+	 * that storage. It must be setup at session creation time.
+	 */
+	struct iscsi_hdr	*hdr;
+	char			*data;		/* mgmt payload */
+	int			data_count;	/* counts data to be sent */
+	uint32_t		itt;		/* this ITT */
+	void			*dd_data;	/* driver/transport data */
+	struct list_head	running;
+};
+
+struct iscsi_cmd_task {
+	/*
+	 * Becuae LLDs allocate their hdr differently, this is a pointer to
+	 * that storage. It must be setup at session creation time.
+	 */
+	struct iscsi_cmd	*hdr;
+	int			itt;		/* this ITT */
+	int			datasn;		/* DataSN */
+
+	uint32_t		unsol_datasn;
+	int			imm_count;	/* imm-data (bytes)   */
+	int			unsol_count;	/* unsolicited (bytes)*/
+	int			data_count;	/* remaining Data-Out */
+	struct scsi_cmnd	*sc;		/* associated SCSI cmd*/
+	int			total_length;
+	struct iscsi_conn	*conn;		/* used connection    */
+	struct iscsi_mgmt_task	*mtask;		/* tmf mtask in progr */
+
+	struct list_head	running;	/* running cmd list */
+	void			*dd_data;	/* driver/transport data */
+};
+
+struct iscsi_conn {
+	struct iscsi_cls_conn	*cls_conn;	/* ptr to class connection */
+	void			*dd_data;	/* iscsi_transport data */
+	struct iscsi_session	*session;	/* parent session */
+	/*
+	 * LLDs should set this lock. It protects the transport recv
+	 * code
+	 */
+	rwlock_t		*recv_lock;
+	/*
+	 * conn_stop() flag: stop to recover, stop to terminate
+	 */
+        int			stop_stage;
+
+	/* iSCSI connection-wide sequencing */
+	uint32_t		exp_statsn;
+
+	/* control data */
+	int			id;		/* CID */
+	struct list_head	item;		/* maintains list of conns */
+	int			c_stage;	/* connection state */
+	struct iscsi_mgmt_task	*login_mtask;	/* mtask used for login/text */
+	struct iscsi_mgmt_task	*mtask;		/* xmit mtask in progress */
+	struct iscsi_cmd_task	*ctask;		/* xmit ctask in progress */
+
+	/* xmit */
+	struct kfifo		*immqueue;	/* immediate xmit queue */
+	struct kfifo		*mgmtqueue;	/* mgmt (control) xmit queue */
+	struct list_head	mgmt_run_list;	/* list of control tasks */
+	struct kfifo		*xmitqueue;	/* data-path cmd queue */
+	struct list_head	run_list;	/* list of cmds in progress */
+	struct work_struct	xmitwork;	/* per-conn. xmit workqueue */
+	/*
+	 * serializes connection xmit, access to kfifos:
+	 * xmitqueue, immqueue, mgmtqueue
+	 */
+	struct mutex		xmitmutex;
+
+	unsigned long		suspend_tx;	/* suspend Tx */
+	unsigned long		suspend_rx;	/* suspend Rx */
+
+	/* abort */
+	wait_queue_head_t	ehwait;		/* used in eh_abort() */
+	struct iscsi_tm		tmhdr;
+	struct timer_list	tmabort_timer;
+	int			tmabort_state;	/* see TMABORT_INITIAL, etc.*/
+
+	/* negotiated params */
+	int			max_recv_dlength; /* initiator_max_recv_dsl*/
+	int			max_xmit_dlength; /* target_max_recv_dsl */
+	int			hdrdgst_en;
+	int			datadgst_en;
+
+	/* MIB-statistics */
+	uint64_t		txdata_octets;
+	uint64_t		rxdata_octets;
+	uint32_t		scsicmd_pdus_cnt;
+	uint32_t		dataout_pdus_cnt;
+	uint32_t		scsirsp_pdus_cnt;
+	uint32_t		datain_pdus_cnt;
+	uint32_t		r2t_pdus_cnt;
+	uint32_t		tmfcmd_pdus_cnt;
+	int32_t			tmfrsp_pdus_cnt;
+
+	/* custom statistics */
+	uint32_t		eh_abort_cnt;
+};
+
+struct iscsi_queue {
+	struct kfifo		*queue;		/* FIFO Queue */
+	void			**pool;		/* Pool of elements */
+	int			max;		/* Max number of elements */
+};
+
+struct iscsi_session {
+	/* iSCSI session-wide sequencing */
+	uint32_t		cmdsn;
+	uint32_t		exp_cmdsn;
+	uint32_t		max_cmdsn;
+
+	/* configuration */
+	int			initial_r2t_en;
+	int			max_r2t;
+	int			imm_data_en;
+	int			first_burst;
+	int			max_burst;
+	int			time2wait;
+	int			time2retain;
+	int			pdu_inorder_en;
+	int			dataseq_inorder_en;
+	int			erl;
+	int			ifmarker_en;
+	int			ofmarker_en;
+
+	/* control data */
+	struct iscsi_transport	*tt;
+	struct Scsi_Host	*host;
+	struct iscsi_conn	*leadconn;	/* leading connection */
+	spinlock_t		lock;		/* protects session state, *
+						 * sequence numbers,       *
+						 * session resources:      *
+						 * - cmdpool,		   *
+						 * - mgmtpool,		   *
+						 * - r2tpool		   */
+	int			state;		/* session state           */
+	int			recovery_failed;
+	struct list_head	item;
+	int			conn_cnt;
+	int			age;		/* counts session re-opens */
+
+	struct list_head	connections;	/* list of connections */
+	int			cmds_max;	/* size of cmds array */
+	struct iscsi_cmd_task	**cmds;		/* Original Cmds arr */
+	struct iscsi_queue	cmdpool;	/* PDU's pool */
+	int			mgmtpool_max;	/* size of mgmt array */
+	struct iscsi_mgmt_task	**mgmt_cmds;	/* Original mgmt arr */
+	struct iscsi_queue	mgmtpool;	/* Mgmt PDU's pool */
+};
+
+/*
+ * scsi host template
+ */
+extern int iscsi_change_queue_depth(struct scsi_device *sdev, int depth);
+extern int iscsi_eh_abort(struct scsi_cmnd *sc);
+extern int iscsi_eh_host_reset(struct scsi_cmnd *sc);
+extern int iscsi_queuecommand(struct scsi_cmnd *sc,
+			      void (*done)(struct scsi_cmnd *));
+
+/*
+ * session management
+ */
+extern struct iscsi_cls_session *
+iscsi_session_setup(struct iscsi_transport *, struct scsi_transport_template *,
+		    int, int, uint32_t, uint32_t *);
+extern void iscsi_session_teardown(struct iscsi_cls_session *);
+extern struct iscsi_session *class_to_transport_session(struct iscsi_cls_session *);
+extern void iscsi_start_session_recovery(struct iscsi_session *,
+					struct iscsi_conn *, int);
+extern void iscsi_session_recovery_timedout(struct iscsi_cls_session *);
+
+#define session_to_cls(_sess) \
+	hostdata_session(_sess->host->hostdata)
+
+/*
+ * connection management
+ */
+extern struct iscsi_cls_conn *iscsi_conn_setup(struct iscsi_cls_session *,
+					       uint32_t);
+extern void iscsi_conn_teardown(struct iscsi_cls_conn *);
+extern int iscsi_conn_start(struct iscsi_cls_conn *);
+extern void iscsi_conn_stop(struct iscsi_cls_conn *, int);
+extern int iscsi_conn_bind(struct iscsi_cls_session *, struct iscsi_cls_conn *,
+			   int);
+extern void iscsi_conn_failure(struct iscsi_conn *conn, enum iscsi_err err);
+
+/*
+ * pdu and task processing
+ */
+extern int iscsi_check_assign_cmdsn(struct iscsi_session *,
+				    struct iscsi_nopin *);
+extern void iscsi_prep_unsolicit_data_pdu(struct iscsi_cmd_task *,
+					struct iscsi_data *hdr,
+					int transport_data_cnt);
+extern int iscsi_conn_send_pdu(struct iscsi_cls_conn *, struct iscsi_hdr *,
+				char *, uint32_t);
+extern int iscsi_complete_pdu(struct iscsi_conn *, struct iscsi_hdr *,
+			      char *, int);
+extern int __iscsi_complete_pdu(struct iscsi_conn *, struct iscsi_hdr *,
+				char *, int);
+extern int iscsi_verify_itt(struct iscsi_conn *, struct iscsi_hdr *,
+			    uint32_t *);
+
+/*
+ * generic helpers
+ */
+extern void iscsi_pool_free(struct iscsi_queue *, void **);
+extern int iscsi_pool_init(struct iscsi_queue *, int, void ***, int);
+
+#endif