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/*
* iSCSI transport class definitions
*
* Copyright (C) IBM Corporation, 2004
* Copyright (C) Mike Christie, 2004 - 2005
* Copyright (C) Dmitry Yusupov, 2004 - 2005
* Copyright (C) Alex Aizman, 2004 - 2005
*
* 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 SCSI_TRANSPORT_ISCSI_H
#define SCSI_TRANSPORT_ISCSI_H
#include <scsi/iscsi_if.h>
/**
* struct iscsi_transport - iSCSI Transport template
*
* @name: transport name
* @caps: iSCSI Data-Path capabilities
* @create_session: create new iSCSI session object
* @destroy_session: destroy existing iSCSI session object
* @create_conn: create new iSCSI connection
* @bind_conn: associate this connection with existing iSCSI session
* and specified transport descriptor
* @destroy_conn: destroy inactive iSCSI connection
* @set_param: set iSCSI Data-Path operational parameter
* @start_conn: set connection to be operational
* @stop_conn: suspend/recover/terminate connection
* @send_pdu: send iSCSI PDU, Login, Logout, NOP-Out, Reject, Text.
*
* Template API provided by iSCSI Transport
*/
struct iscsi_transport {
struct module *owner;
char *name;
unsigned int caps;
struct scsi_host_template *host_template;
int hostdata_size;
int max_lun;
unsigned int max_conn;
unsigned int max_cmd_len;
iscsi_sessionh_t (*create_session) (uint32_t initial_cmdsn,
struct Scsi_Host *shost);
void (*destroy_session) (iscsi_sessionh_t session);
iscsi_connh_t (*create_conn) (iscsi_sessionh_t session, uint32_t cid);
int (*bind_conn) (iscsi_sessionh_t session, iscsi_connh_t conn,
uint32_t transport_fd, int is_leading);
int (*start_conn) (iscsi_connh_t conn);
void (*stop_conn) (iscsi_connh_t conn, int flag);
void (*destroy_conn) (iscsi_connh_t conn);
int (*set_param) (iscsi_connh_t conn, enum iscsi_param param,
uint32_t value);
int (*get_param) (iscsi_connh_t conn, enum iscsi_param param,
uint32_t *value);
int (*send_pdu) (iscsi_connh_t conn, struct iscsi_hdr *hdr,
char *data, uint32_t data_size);
void (*get_stats) (iscsi_connh_t conn, struct iscsi_stats *stats);
};
/*
* transport registration upcalls
*/
extern int iscsi_register_transport(struct iscsi_transport *tt);
extern int iscsi_unregister_transport(struct iscsi_transport *tt);
/*
* control plane upcalls
*/
extern void iscsi_conn_error(iscsi_connh_t conn, enum iscsi_err error);
extern int iscsi_recv_pdu(iscsi_connh_t conn, struct iscsi_hdr *hdr,
char *data, uint32_t data_size);
#endif
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