ffe82e05b3
Previously ISID was changed every time, that made impossible correct persistent reservation, because reconnected session was identified as completely new one. Reviewed by: trasz MFC after: 1 week
137 lines
3.8 KiB
C
137 lines
3.8 KiB
C
/*-
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* Copyright (c) 2012 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by Edward Tomasz Napierala under sponsorship
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* from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef ISCSI_H
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#define ISCSI_H
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struct iscsi_softc;
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struct icl_conn;
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#define ISCSI_NAME_LEN 224 /* 223 bytes, by RFC 3720, + '\0' */
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#define ISCSI_ADDR_LEN 47 /* INET6_ADDRSTRLEN + '\0' */
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#define ISCSI_SECRET_LEN 17 /* 16 + '\0' */
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struct iscsi_outstanding {
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TAILQ_ENTRY(iscsi_outstanding) io_next;
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union ccb *io_ccb;
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size_t io_received;
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uint32_t io_initiator_task_tag;
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uint32_t io_datasn;
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};
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struct iscsi_session {
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TAILQ_ENTRY(iscsi_session) is_next;
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struct icl_conn *is_conn;
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struct mtx is_lock;
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uint32_t is_statsn;
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uint32_t is_cmdsn;
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uint32_t is_expcmdsn;
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uint32_t is_maxcmdsn;
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uint32_t is_initiator_task_tag;
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int is_header_digest;
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int is_data_digest;
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int is_initial_r2t;
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size_t is_max_burst_length;
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size_t is_first_burst_length;
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uint8_t is_isid[6];
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uint16_t is_tsih;
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bool is_immediate_data;
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size_t is_max_data_segment_length;
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char is_target_alias[ISCSI_ALIAS_LEN];
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TAILQ_HEAD(, iscsi_outstanding) is_outstanding;
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STAILQ_HEAD(, icl_pdu) is_postponed;
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struct callout is_callout;
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unsigned int is_timeout;
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/*
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* XXX: This could be rewritten using a single variable,
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* but somehow it results in uglier code.
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*/
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/*
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* We're waiting for iscsid(8); after iscsid_timeout
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* expires, kernel will wake up an iscsid(8) to handle
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* the session.
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*/
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bool is_waiting_for_iscsid;
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/*
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* Some iscsid(8) instance is handling the session;
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* after login_timeout expires, kernel will wake up
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* another iscsid(8) to handle the session.
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*/
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bool is_login_phase;
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/*
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* We're in the process of removing the iSCSI session.
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*/
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bool is_terminating;
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/*
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* We're waiting for the maintenance thread to do some
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* reconnection tasks.
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*/
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bool is_reconnecting;
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bool is_connected;
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struct cam_devq *is_devq;
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struct cam_sim *is_sim;
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struct cam_path *is_path;
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struct cv is_maintenance_cv;
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struct iscsi_softc *is_softc;
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unsigned int is_id;
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struct iscsi_session_conf is_conf;
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bool is_simq_frozen;
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char is_reason[ISCSI_REASON_LEN];
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#ifdef ICL_KERNEL_PROXY
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struct cv is_login_cv;;
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struct icl_pdu *is_login_pdu;
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#endif
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};
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struct iscsi_softc {
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device_t sc_dev;
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struct sx sc_lock;
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struct cdev *sc_cdev;
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TAILQ_HEAD(, iscsi_session) sc_sessions;
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struct cv sc_cv;
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unsigned int sc_last_session_id;
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eventhandler_tag sc_shutdown_eh;
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};
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#endif /* !ISCSI_H */
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