add open iscsi netlink interface to iscsi transport class

diff -Naurp linux-2.6.12-rc3.orig/include/scsi/iscsi_ifev.h linux-2.6.12-rc3/include/scsi/iscsi_ifev.h
@@ -0,0 +1,121 @@
+/*
+ * iSCSI Kernel/User Interface Events
+ *
+ * Copyright (C) 2005 Dmitry Yusupov, Alex Aizman
+ * maintained by [email protected]
+ *
+ * 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.
+ *
+ * See the file COPYING included with this distribution for more details.
+ */
+
+#ifndef ISCSI_IFEV_H
+#define ISCSI_IFEV_H
+
+enum iscsi_uevent_e {
+	ISCSI_UEVENT_UNKNOWN		= 0,
+
+	/* down events */
+	ISCSI_UEVENT_CREATE_SESSION	= UEVENT_BASE + 1,
+	ISCSI_UEVENT_DESTROY_SESSION	= UEVENT_BASE + 2,
+	ISCSI_UEVENT_CREATE_CNX		= UEVENT_BASE + 3,
+	ISCSI_UEVENT_DESTROY_CNX	= UEVENT_BASE + 4,
+	ISCSI_UEVENT_BIND_CNX		= UEVENT_BASE + 5,
+	ISCSI_UEVENT_SET_PARAM		= UEVENT_BASE + 6,
+	ISCSI_UEVENT_START_CNX		= UEVENT_BASE + 7,
+	ISCSI_UEVENT_STOP_CNX		= UEVENT_BASE + 8,
+	ISCSI_UEVENT_SEND_PDU		= UEVENT_BASE + 9,
+	ISCSI_UEVENT_TRANS_LIST		= UEVENT_BASE + 10,
+	ISCSI_UEVENT_GET_STATS		= UEVENT_BASE + 11,
+	ISCSI_UEVENT_GET_PARAM		= UEVENT_BASE + 12,
+
+	/* up events */
+	ISCSI_KEVENT_RECV_PDU		= KEVENT_BASE + 1,
+	ISCSI_KEVENT_CNX_ERROR		= KEVENT_BASE + 2,
+	ISCSI_KEVENT_IF_ERROR		= KEVENT_BASE + 3,
+};
+
+struct iscsi_uevent {
+	uint32_t type; /* k/u events type */
+	uint32_t iferror; /* carries interface or resource errors */
+	uint64_t transport_handle;
+
+	union {
+		/* messages u -> k */
+		struct msg_create_session {
+			uint32_t	initial_cmdsn;
+		} c_session;
+		struct msg_destroy_session {
+			uint64_t	session_handle;
+			uint32_t	sid;
+		} d_session;
+		struct msg_create_cnx {
+			uint64_t	session_handle;
+			uint32_t	cid;
+			uint32_t	sid;
+		} c_cnx;
+		struct msg_bind_cnx {
+			uint64_t	session_handle;
+			uint64_t	cnx_handle;
+			uint32_t	transport_fd;
+			uint32_t	is_leading;
+		} b_cnx;
+		struct msg_destroy_cnx {
+			uint64_t	cnx_handle;
+			uint32_t	cid;
+		} d_cnx;
+		struct msg_send_pdu {
+			uint32_t	hdr_size;
+			uint32_t	data_size;
+			uint64_t	cnx_handle;
+		} send_pdu;
+		struct msg_set_param {
+			uint64_t	cnx_handle;
+			uint32_t	param; /* enum iscsi_param */
+			uint32_t	value;
+		} set_param;
+		struct msg_start_cnx {
+			uint64_t	cnx_handle;
+		} start_cnx;
+		struct msg_stop_cnx {
+			uint64_t	cnx_handle;
+			uint32_t	flag;
+		} stop_cnx;
+		struct msg_get_stats {
+			uint64_t	cnx_handle;
+		} get_stats;
+	} u;
+	union {
+		/* messages k -> u */
+		uint64_t		handle;
+		int			retcode;
+		struct msg_create_session_ret {
+			uint64_t	session_handle;
+			uint32_t	sid;
+		} c_session_ret;
+		struct msg_recv_req {
+			uint64_t	recv_handle;
+			uint64_t	cnx_handle;
+		} recv_req;
+		struct msg_cnx_error {
+			uint64_t	cnx_handle;
+			uint32_t	error; /* enum iscsi_err */
+		} cnxerror;
+		struct msg_trans_list {
+			struct {
+				uint64_t trans_handle;
+				char name[ISCSI_TRANSPORT_NAME_MAXLEN];
+			} elements[ISCSI_TRANSPORT_MAX];
+		} t_list;
+	} r;
+} __attribute__ ((aligned (sizeof(unsigned long))));
+
+#endif /* ISCSI_IFEV_H */

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