IB/iser: iSCSI iSER transport provider high level code

/*

 * iSCSI Initiator over iSER Data-Path

 *

 * Copyright (C) 2004 Dmitry Yusupov

 * Copyright (C) 2004 Alex Aizman

 * Copyright (C) 2005 Mike Christie

 * Copyright (c) 2005, 2006 Voltaire, Inc. All rights reserved.

 * maintained by openib-general@openib.org

 *

 * This software is available to you under a choice of one of two

 * licenses.  You may choose to be licensed under the terms of the GNU

 * General Public License (GPL) Version 2, available from the file

 * COPYING in the main directory of this source tree, or the

 * OpenIB.org BSD license below:

 *

 *     Redistribution and use in source and binary forms, with or

 *     without modification, are permitted provided that the following

 *     conditions are met:

 *

 *	- Redistributions of source code must retain the above

 *	  copyright notice, this list of conditions and the following

 *	  disclaimer.

 *

 *	- Redistributions in binary form must reproduce the above

 *	  copyright notice, this list of conditions and the following

 *	  disclaimer in the documentation and/or other materials

 *	  provided with the distribution.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS

 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN

 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

 * SOFTWARE.

 *

 * Credits:

 *	Christoph Hellwig

 *	FUJITA Tomonori

 *	Arne Redlich

 *	Zhenyu Wang

 * Modified by:

 *      Erez Zilber

 *

 *

 * $Id: iscsi_iser.c 6965 2006-05-07 11:36:20Z ogerlitz $

 */

#include <linux/types.h>

#include <linux/list.h>

#include <linux/hardirq.h>

#include <linux/kfifo.h>

#include <linux/blkdev.h>

#include <linux/init.h>

#include <linux/ioctl.h>

#include <linux/devfs_fs_kernel.h>

#include <linux/cdev.h>

#include <linux/in.h>

#include <linux/net.h>

#include <linux/scatterlist.h>

#include <linux/delay.h>

#include <net/sock.h>

#include <asm/uaccess.h>

#include <scsi/scsi_cmnd.h>

#include <scsi/scsi_device.h>

#include <scsi/scsi_eh.h>

#include <scsi/scsi_tcq.h>

#include <scsi/scsi_host.h>

#include <scsi/scsi.h>

#include <scsi/scsi_transport_iscsi.h>

#include "iscsi_iser.h"

static unsigned int iscsi_max_lun = 512;

module_param_named(max_lun, iscsi_max_lun, uint, S_IRUGO);

int iser_debug_level = 0;

MODULE_DESCRIPTION("iSER (iSCSI Extensions for RDMA) Datamover "

		   "v" DRV_VER " (" DRV_DATE ")");

MODULE_LICENSE("Dual BSD/GPL");

MODULE_AUTHOR("Alex Nezhinsky, Dan Bar Dov, Or Gerlitz");

module_param_named(debug_level, iser_debug_level, int, 0644);

MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0 (default:disabled)");

struct iser_global ig;

void

iscsi_iser_recv(struct iscsi_conn *conn,

		struct iscsi_hdr *hdr, char *rx_data, int rx_data_len)

{

	int rc = 0;

	uint32_t ret_itt;

	int datalen;

	int ahslen;

	/* verify PDU length */

	datalen = ntoh24(hdr->dlength);

	if (datalen != rx_data_len) {

		printk(KERN_ERR "iscsi_iser: datalen %d (hdr) != %d (IB) \n",

		       datalen, rx_data_len);

		rc = ISCSI_ERR_DATALEN;

		goto error;

	}

	/* read AHS */

	ahslen = hdr->hlength * 4;

	/* verify itt (itt encoding: age+cid+itt) */

	rc = iscsi_verify_itt(conn, hdr, &ret_itt);

	if (!rc)

		rc = iscsi_complete_pdu(conn, hdr, rx_data, rx_data_len);

	if (rc && rc != ISCSI_ERR_NO_SCSI_CMD)

		goto error;

	return;

error:

	iscsi_conn_failure(conn, rc);

}

/**

 * iscsi_iser_cmd_init - Initialize iSCSI SCSI_READ or SCSI_WRITE commands

 *

 **/

static void

iscsi_iser_cmd_init(struct iscsi_cmd_task *ctask)

{

	struct iscsi_iser_conn     *iser_conn  = ctask->conn->dd_data;

	struct iscsi_iser_cmd_task *iser_ctask = ctask->dd_data;

	struct scsi_cmnd  *sc = ctask->sc;

	iser_ctask->command_sent = 0;

	iser_ctask->iser_conn    = iser_conn;

	if (sc->sc_data_direction == DMA_TO_DEVICE) {

		BUG_ON(ctask->total_length == 0);

		/* bytes to be sent via RDMA operations */

		iser_ctask->rdma_data_count = ctask->total_length -

					 ctask->imm_count -

					 ctask->unsol_count;

		debug_scsi("cmd [itt %x total %d imm %d unsol_data %d "

			   "rdma_data %d]\n",

			   ctask->itt, ctask->total_length, ctask->imm_count,

			   ctask->unsol_count, iser_ctask->rdma_data_count);

	} else

		/* bytes to be sent via RDMA operations */

		iser_ctask->rdma_data_count = ctask->total_length;

	iser_ctask_rdma_init(iser_ctask);

}

/**

 * iscsi_mtask_xmit - xmit management(immediate) task

 * @conn: iscsi connection

 * @mtask: task management task

 *

 * Notes:

 *	The function can return -EAGAIN in which case caller must

 *	call it again later, or recover. '0' return code means successful

 *	xmit.

 *

 **/

static int

iscsi_iser_mtask_xmit(struct iscsi_conn *conn,

		      struct iscsi_mgmt_task *mtask)

{

	int error = 0;

	debug_scsi("mtask deq [cid %d itt 0x%x]\n", conn->id, mtask->itt);

	error = iser_send_control(conn, mtask);

	/* since iser xmits control with zero copy, mtasks can not be recycled

	 * right after sending them.

	 * The recycling scheme is based on whether a response is expected

	 * - if yes, the mtask is recycled at iscsi_complete_pdu

	 * - if no,  the mtask is recycled at iser_snd_completion

	 */

	if (error && error != -EAGAIN)

		iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);

	return error;

}

static int

iscsi_iser_ctask_xmit_unsol_data(struct iscsi_conn *conn,

				 struct iscsi_cmd_task *ctask)

{

	struct iscsi_data  hdr;

	int error = 0;

	struct iscsi_iser_cmd_task *iser_ctask = ctask->dd_data;

	/* Send data-out PDUs while there's still unsolicited data to send */

	while (ctask->unsol_count > 0) {

		iscsi_prep_unsolicit_data_pdu(ctask, &hdr,

					      iser_ctask->rdma_data_count);

		debug_scsi("Sending data-out: itt 0x%x, data count %d\n",

			   hdr.itt, ctask->data_count);

		/* the buffer description has been passed with the command */

		/* Send the command */

		error = iser_send_data_out(conn, ctask, &hdr);

		if (error) {

			ctask->unsol_datasn--;

			goto iscsi_iser_ctask_xmit_unsol_data_exit;

		}

		ctask->unsol_count -= ctask->data_count;

		debug_scsi("Need to send %d more as data-out PDUs\n",

			   ctask->unsol_count);

	}

iscsi_iser_ctask_xmit_unsol_data_exit:

	return error;

}

static int

iscsi_iser_ctask_xmit(struct iscsi_conn *conn,

		      struct iscsi_cmd_task *ctask)

{

	struct iscsi_iser_cmd_task *iser_ctask = ctask->dd_data;

	int error = 0;

	debug_scsi("ctask deq [cid %d itt 0x%x]\n",

		   conn->id, ctask->itt);

	/*

	 * serialize with TMF AbortTask

	 */

	if (ctask->mtask)

		return error;

	/* Send the cmd PDU */

	if (!iser_ctask->command_sent) {

		error = iser_send_command(conn, ctask);

		if (error)

			goto iscsi_iser_ctask_xmit_exit;

		iser_ctask->command_sent = 1;

	}

	/* Send unsolicited data-out PDU(s) if necessary */

	if (ctask->unsol_count)

		error = iscsi_iser_ctask_xmit_unsol_data(conn, ctask);

 iscsi_iser_ctask_xmit_exit:

	if (error && error != -EAGAIN)

		iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);

	return error;

}

static void

iscsi_iser_cleanup_ctask(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)

{

	struct iscsi_iser_cmd_task *iser_ctask = ctask->dd_data;

	if (iser_ctask->status == ISER_TASK_STATUS_STARTED) {

		iser_ctask->status = ISER_TASK_STATUS_COMPLETED;

		iser_ctask_rdma_finalize(iser_ctask);

	}

}

static struct iser_conn *

iscsi_iser_ib_conn_lookup(__u64 ep_handle)

{

	struct iser_conn *ib_conn;

	struct iser_conn *uib_conn = (struct iser_conn *)(unsigned long)ep_handle;

	mutex_lock(&ig.connlist_mutex);

	list_for_each_entry(ib_conn, &ig.connlist, conn_list) {

		if (ib_conn == uib_conn) {

			mutex_unlock(&ig.connlist_mutex);

			return ib_conn;

		}

	}

	mutex_unlock(&ig.connlist_mutex);

	iser_err("no conn exists for eph %llx\n",(unsigned long long)ep_handle);

	return NULL;

}

static struct iscsi_cls_conn *

iscsi_iser_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx)

{

	struct iscsi_conn *conn;

	struct iscsi_cls_conn *cls_conn;

	struct iscsi_iser_conn *iser_conn;

	cls_conn = iscsi_conn_setup(cls_session, conn_idx);

	if (!cls_conn)

		return NULL;

	conn = cls_conn->dd_data;

	/*

	 * due to issues with the login code re iser sematics

	 * this not set in iscsi_conn_setup - FIXME

	 */

	conn->max_recv_dlength = 128;

	iser_conn = kzalloc(sizeof(*iser_conn), GFP_KERNEL);

	if (!iser_conn)

		goto conn_alloc_fail;

	/* currently this is the only field which need to be initiated */

	rwlock_init(&iser_conn->lock);

	conn->dd_data = iser_conn;

	iser_conn->iscsi_conn = conn;

	return cls_conn;

conn_alloc_fail:

	iscsi_conn_teardown(cls_conn);

	return NULL;

}

static void

iscsi_iser_conn_destroy(struct iscsi_cls_conn *cls_conn)

{

	struct iscsi_conn *conn = cls_conn->dd_data;

	struct iscsi_iser_conn *iser_conn = conn->dd_data;

	iscsi_conn_teardown(cls_conn);

	kfree(iser_conn);

}

static int

iscsi_iser_conn_bind(struct iscsi_cls_session *cls_session,

		     struct iscsi_cls_conn *cls_conn, uint64_t transport_eph,

		     int is_leading)

{

	struct iscsi_conn *conn = cls_conn->dd_data;

	struct iscsi_iser_conn *iser_conn;

	struct iser_conn *ib_conn;

	int error;

	error = iscsi_conn_bind(cls_session, cls_conn, is_leading);

	if (error)

		return error;

	/* the transport ep handle comes from user space so it must be

	 * verified against the global ib connections list */

	ib_conn = iscsi_iser_ib_conn_lookup(transport_eph);

	if (!ib_conn) {

		iser_err("can't bind eph %llx\n",

			 (unsigned long long)transport_eph);

		return -EINVAL;

	}

	/* binds the iSER connection retrieved from the previously

	 * connected ep_handle to the iSCSI layer connection. exchanges

	 * connection pointers */

	iser_err("binding iscsi conn %p to iser_conn %p\n",conn,ib_conn);

	iser_conn = conn->dd_data;

	ib_conn->iser_conn = iser_conn;

	iser_conn->ib_conn  = ib_conn;

	conn->recv_lock = &iser_conn->lock;

	return 0;

}

static int

iscsi_iser_conn_start(struct iscsi_cls_conn *cls_conn)

{

	struct iscsi_conn *conn = cls_conn->dd_data;

	int err;

	err = iscsi_conn_start(cls_conn);

	if (err)

		return err;

	return iser_conn_set_full_featured_mode(conn);

}

static void

iscsi_iser_conn_terminate(struct iscsi_conn *conn)

{

	struct iscsi_iser_conn *iser_conn = conn->dd_data;

	struct iser_conn *ib_conn = iser_conn->ib_conn;

	BUG_ON(!ib_conn);

	/* starts conn teardown process, waits until all previously   *

	 * posted buffers get flushed, deallocates all conn resources */

	iser_conn_terminate(ib_conn);

	iser_conn->ib_conn = NULL;

	conn->recv_lock = NULL;

}

static struct iscsi_transport iscsi_iser_transport;

static struct iscsi_cls_session *

iscsi_iser_session_create(struct iscsi_transport *iscsit,

			 struct scsi_transport_template *scsit,

			  uint32_t initial_cmdsn, uint32_t *hostno)

{

	struct iscsi_cls_session *cls_session;

	struct iscsi_session *session;

	int i;

	uint32_t hn;

	struct iscsi_cmd_task  *ctask;

	struct iscsi_mgmt_task *mtask;

	struct iscsi_iser_cmd_task *iser_ctask;

	struct iser_desc *desc;

	cls_session = iscsi_session_setup(iscsit, scsit,

					  sizeof(struct iscsi_iser_cmd_task),

					  sizeof(struct iser_desc),

					  initial_cmdsn, &hn);

	if (!cls_session)

	return NULL;

	*hostno = hn;

	session = class_to_transport_session(cls_session);

	/* libiscsi setup itts, data and pool so just set desc fields */

	for (i = 0; i < session->cmds_max; i++) {

		ctask      = session->cmds[i];

		iser_ctask = ctask->dd_data;

		ctask->hdr = (struct iscsi_cmd *)&iser_ctask->desc.iscsi_header;

	}

	for (i = 0; i < session->mgmtpool_max; i++) {

		mtask      = session->mgmt_cmds[i];

		desc       = mtask->dd_data;

		mtask->hdr = &desc->iscsi_header;

		desc->data = mtask->data;

	}

	return cls_session;

}

static int

iscsi_iser_conn_set_param(struct iscsi_cls_conn *cls_conn,

			  enum iscsi_param param, uint32_t value)

{

	struct iscsi_conn *conn = cls_conn->dd_data;

	struct iscsi_session *session = conn->session;

	spin_lock_bh(&session->lock);

	if (conn->c_stage != ISCSI_CONN_INITIAL_STAGE &&

	    conn->stop_stage != STOP_CONN_RECOVER) {

		printk(KERN_ERR "iscsi_iser: can not change parameter [%d]\n",

		       param);

		spin_unlock_bh(&session->lock);

		return 0;

	}

	spin_unlock_bh(&session->lock);

	switch (param) {

	case ISCSI_PARAM_MAX_RECV_DLENGTH:

		/* TBD */

		break;

	case ISCSI_PARAM_MAX_XMIT_DLENGTH:

		conn->max_xmit_dlength =  value;

		break;

	case ISCSI_PARAM_HDRDGST_EN:

		if (value) {

			printk(KERN_ERR "DataDigest wasn't negotiated to None");

			return -EPROTO;

		}

		break;

	case ISCSI_PARAM_DATADGST_EN:

		if (value) {

			printk(KERN_ERR "DataDigest wasn't negotiated to None");

			return -EPROTO;

		}

		break;

	case ISCSI_PARAM_INITIAL_R2T_EN:

		session->initial_r2t_en = value;

		break;

	case ISCSI_PARAM_IMM_DATA_EN:

		session->imm_data_en = value;

		break;

	case ISCSI_PARAM_FIRST_BURST:

		session->first_burst = value;

		break;

	case ISCSI_PARAM_MAX_BURST:

		session->max_burst = value;

		break;

	case ISCSI_PARAM_PDU_INORDER_EN:

		session->pdu_inorder_en = value;

		break;

	case ISCSI_PARAM_DATASEQ_INORDER_EN:

		session->dataseq_inorder_en = value;

		break;

	case ISCSI_PARAM_ERL:

		session->erl = value;

		break;

	case ISCSI_PARAM_IFMARKER_EN:

		if (value) {

			printk(KERN_ERR "IFMarker wasn't negotiated to No");

			return -EPROTO;

		}

		break;

	case ISCSI_PARAM_OFMARKER_EN:

		if (value) {

			printk(KERN_ERR "OFMarker wasn't negotiated to No");

			return -EPROTO;

		}

		break;

	default:

		break;

	}

	return 0;

}

static int

iscsi_iser_session_get_param(struct iscsi_cls_session *cls_session,

			     enum iscsi_param param, uint32_t *value)

{

	struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);

	struct iscsi_session *session = iscsi_hostdata(shost->hostdata);

	switch (param) {

	case ISCSI_PARAM_INITIAL_R2T_EN:

		*value = session->initial_r2t_en;

		break;

	case ISCSI_PARAM_MAX_R2T:

		*value = session->max_r2t;

		break;

	case ISCSI_PARAM_IMM_DATA_EN:

		*value = session->imm_data_en;

		break;

	case ISCSI_PARAM_FIRST_BURST:

		*value = session->first_burst;

		break;

	case ISCSI_PARAM_MAX_BURST:

		*value = session->max_burst;

		break;

	case ISCSI_PARAM_PDU_INORDER_EN:

		*value = session->pdu_inorder_en;

		break;

	case ISCSI_PARAM_DATASEQ_INORDER_EN:

		*value = session->dataseq_inorder_en;

		break;

	case ISCSI_PARAM_ERL:

		*value = session->erl;

		break;

	case ISCSI_PARAM_IFMARKER_EN:

		*value = 0;

		break;

	case ISCSI_PARAM_OFMARKER_EN:

		*value = 0;

		break;

	default:

		return ISCSI_ERR_PARAM_NOT_FOUND;

	}

	return 0;

}

static int

iscsi_iser_conn_get_param(struct iscsi_cls_conn *cls_conn,

			  enum iscsi_param param, uint32_t *value)

{

	struct iscsi_conn *conn = cls_conn->dd_data;

	switch(param) {

	case ISCSI_PARAM_MAX_RECV_DLENGTH:

		*value = conn->max_recv_dlength;

		break;

	case ISCSI_PARAM_MAX_XMIT_DLENGTH:

		*value = conn->max_xmit_dlength;

		break;

	case ISCSI_PARAM_HDRDGST_EN:

		*value = 0;

		break;

	case ISCSI_PARAM_DATADGST_EN:

		*value = 0;

		break;

	/*case ISCSI_PARAM_TARGET_RECV_DLENGTH:

		*value = conn->target_recv_dlength;

		break;

	case ISCSI_PARAM_INITIATOR_RECV_DLENGTH:

		*value = conn->initiator_recv_dlength;

		break;*/

	default:

		return ISCSI_ERR_PARAM_NOT_FOUND;

	}

	return 0;

}

static void

iscsi_iser_conn_get_stats(struct iscsi_cls_conn *cls_conn, struct iscsi_stats *stats)

{

	struct iscsi_conn *conn = cls_conn->dd_data;

	stats->txdata_octets = conn->txdata_octets;

	stats->rxdata_octets = conn->rxdata_octets;

	stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;

	stats->dataout_pdus = conn->dataout_pdus_cnt;

	stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;

	stats->datain_pdus = conn->datain_pdus_cnt; /* always 0 */

	stats->r2t_pdus = conn->r2t_pdus_cnt; /* always 0 */

	stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;

	stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;

	stats->custom_length = 3;

	strcpy(stats->custom[0].desc, "qp_tx_queue_full");

	stats->custom[0].value = 0; /* TB iser_conn->qp_tx_queue_full; */

	strcpy(stats->custom[1].desc, "fmr_map_not_avail");

	stats->custom[1].value = 0; /* TB iser_conn->fmr_map_not_avail */;

	strcpy(stats->custom[2].desc, "eh_abort_cnt");

	stats->custom[2].value = conn->eh_abort_cnt;

}

static int

iscsi_iser_ep_connect(struct sockaddr *dst_addr, int non_blocking,

		      __u64 *ep_handle)

{

	int err;

	struct iser_conn *ib_conn;

	err = iser_conn_init(&ib_conn);

	if (err)

		goto out;

	err = iser_connect(ib_conn, NULL, (struct sockaddr_in *)dst_addr, non_blocking);

	if (!err)

		*ep_handle = (__u64)(unsigned long)ib_conn;

out:

	return err;

}

static int

iscsi_iser_ep_poll(__u64 ep_handle, int timeout_ms)

{

	struct iser_conn *ib_conn = iscsi_iser_ib_conn_lookup(ep_handle);

	int rc;

	if (!ib_conn)

		return -EINVAL;

	rc = wait_event_interruptible_timeout(ib_conn->wait,

			     ib_conn->state == ISER_CONN_UP,

			     msecs_to_jiffies(timeout_ms));

	/* if conn establishment failed, return error code to iscsi */

	if (!rc &&

	    (ib_conn->state == ISER_CONN_TERMINATING ||

	     ib_conn->state == ISER_CONN_DOWN))

		rc = -1;

	iser_err("ib conn %p rc = %d\n", ib_conn, rc);

	if (rc > 0)

		return 1; /* success, this is the equivalent of POLLOUT */

	else if (!rc)

		return 0; /* timeout */

	else

		return rc; /* signal */

}

static void

iscsi_iser_ep_disconnect(__u64 ep_handle)

{

	struct iser_conn *ib_conn = iscsi_iser_ib_conn_lookup(ep_handle);

	if (!ib_conn)

		return;

	iser_err("ib conn %p state %d\n",ib_conn, ib_conn->state);

	iser_conn_terminate(ib_conn);

}

static struct scsi_host_template iscsi_iser_sht = {

	.name                   = "iSCSI Initiator over iSER, v." DRV_VER,

	.queuecommand           = iscsi_queuecommand,

	.can_queue		= ISCSI_XMIT_CMDS_MAX - 1,

	.sg_tablesize           = ISCSI_ISER_SG_TABLESIZE,

	.cmd_per_lun            = ISCSI_MAX_CMD_PER_LUN,

	.eh_abort_handler       = iscsi_eh_abort,

	.eh_host_reset_handler	= iscsi_eh_host_reset,

	.use_clustering         = DISABLE_CLUSTERING,

	.proc_name              = "iscsi_iser",

	.this_id                = -1,

};

static struct iscsi_transport iscsi_iser_transport = {

	.owner                  = THIS_MODULE,

	.name                   = "iser",

	.caps                   = CAP_RECOVERY_L0 | CAP_MULTI_R2T,

	.param_mask		= ISCSI_MAX_RECV_DLENGTH |

				  ISCSI_MAX_XMIT_DLENGTH |

				  ISCSI_HDRDGST_EN |

				  ISCSI_DATADGST_EN |

				  ISCSI_INITIAL_R2T_EN |

				  ISCSI_MAX_R2T |

				  ISCSI_IMM_DATA_EN |

				  ISCSI_FIRST_BURST |

				  ISCSI_MAX_BURST |

				  ISCSI_PDU_INORDER_EN |

				  ISCSI_DATASEQ_INORDER_EN,

	.host_template          = &iscsi_iser_sht,

	.conndata_size		= sizeof(struct iscsi_conn),

	.max_lun                = ISCSI_ISER_MAX_LUN,

	.max_cmd_len            = ISCSI_ISER_MAX_CMD_LEN,

	/* session management */

	.create_session         = iscsi_iser_session_create,

	.destroy_session        = iscsi_session_teardown,

	/* connection management */

	.create_conn            = iscsi_iser_conn_create,

	.bind_conn              = iscsi_iser_conn_bind,

	.destroy_conn           = iscsi_iser_conn_destroy,

	.set_param              = iscsi_iser_conn_set_param,

	.get_conn_param		= iscsi_iser_conn_get_param,

	.get_session_param	= iscsi_iser_session_get_param,

	.start_conn             = iscsi_iser_conn_start,

	.stop_conn              = iscsi_conn_stop,

	/* these are called as part of conn recovery */

	.suspend_conn_recv	= NULL, /* FIXME is/how this relvant to iser? */

	.terminate_conn		= iscsi_iser_conn_terminate,

	/* IO */

	.send_pdu		= iscsi_conn_send_pdu,

	.get_stats		= iscsi_iser_conn_get_stats,

	.init_cmd_task		= iscsi_iser_cmd_init,

	.xmit_cmd_task		= iscsi_iser_ctask_xmit,

	.xmit_mgmt_task		= iscsi_iser_mtask_xmit,

	.cleanup_cmd_task	= iscsi_iser_cleanup_ctask,

	/* recovery */

	.session_recovery_timedout = iscsi_session_recovery_timedout,

	.ep_connect             = iscsi_iser_ep_connect,

	.ep_poll                = iscsi_iser_ep_poll,

	.ep_disconnect          = iscsi_iser_ep_disconnect

};

static int __init iser_init(void)

{

	int err;

	iser_dbg("Starting iSER datamover...\n");