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/*-
* Copyright (c) 2012 The FreeBSD Foundation
* All rights reserved.
*
* This software was developed by Edward Tomasz Napierala under sponsorship
* from the FreeBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef ISCSI_H
#define ISCSI_H
struct iscsi_softc;
struct icl_conn;
#define ISCSI_NAME_LEN 224 /* 223 bytes, by RFC 3720, + '\0' */
#define ISCSI_ADDR_LEN 47 /* INET6_ADDRSTRLEN + '\0' */
#define ISCSI_SECRET_LEN 17 /* 16 + '\0' */
struct iscsi_outstanding {
TAILQ_ENTRY(iscsi_outstanding) io_next;
union ccb *io_ccb;
size_t io_received;
uint32_t io_initiator_task_tag;
uint32_t io_datasn;
};
struct iscsi_session {
TAILQ_ENTRY(iscsi_session) is_next;
struct icl_conn *is_conn;
struct mtx is_lock;
uint32_t is_statsn;
uint32_t is_cmdsn;
uint32_t is_expcmdsn;
uint32_t is_maxcmdsn;
uint32_t is_initiator_task_tag;
int is_header_digest;
int is_data_digest;
int is_initial_r2t;
size_t is_max_burst_length;
size_t is_first_burst_length;
uint8_t is_isid[6];
uint16_t is_tsih;
bool is_immediate_data;
size_t is_max_data_segment_length;
char is_target_alias[ISCSI_ALIAS_LEN];
TAILQ_HEAD(, iscsi_outstanding) is_outstanding;
STAILQ_HEAD(, icl_pdu) is_postponed;
struct callout is_callout;
unsigned int is_timeout;
/*
* XXX: This could be rewritten using a single variable,
* but somehow it results in uglier code.
*/
/*
* We're waiting for iscsid(8); after iscsid_timeout
* expires, kernel will wake up an iscsid(8) to handle
* the session.
*/
bool is_waiting_for_iscsid;
/*
* Some iscsid(8) instance is handling the session;
* after login_timeout expires, kernel will wake up
* another iscsid(8) to handle the session.
*/
bool is_login_phase;
/*
* We're in the process of removing the iSCSI session.
*/
bool is_terminating;
/*
* We're waiting for the maintenance thread to do some
* reconnection tasks.
*/
bool is_reconnecting;
bool is_connected;
struct cam_devq *is_devq;
struct cam_sim *is_sim;
struct cam_path *is_path;
struct cv is_maintenance_cv;
struct iscsi_softc *is_softc;
unsigned int is_id;
struct iscsi_session_conf is_conf;
bool is_simq_frozen;
char is_reason[ISCSI_REASON_LEN];
#ifdef ICL_KERNEL_PROXY
struct cv is_login_cv;;
struct icl_pdu *is_login_pdu;
#endif
};
struct iscsi_softc {
device_t sc_dev;
struct sx sc_lock;
struct cdev *sc_cdev;
TAILQ_HEAD(, iscsi_session) sc_sessions;
struct cv sc_cv;
unsigned int sc_last_session_id;
eventhandler_tag sc_shutdown_eh;
};
#endif /* !ISCSI_H */
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