iscsi.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2012 The FreeBSD Foundation
    5  *
    6  * This software was developed by Edward Tomasz Napierala under sponsorship
    7  * from the FreeBSD Foundation.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   28  * SUCH DAMAGE.
   29  *
   30  * $FreeBSD$
   31  */
   32 
   33 #ifndef ISCSI_H
   34 #define ISCSI_H
   35 
   36 struct iscsi_softc;
   37 struct icl_conn;
   38 
   39 #define ISCSI_NAME_LEN          224     /* 223 bytes, by RFC 3720, + '\0' */
   40 #define ISCSI_ADDR_LEN          47      /* INET6_ADDRSTRLEN + '\0' */
   41 #define ISCSI_SECRET_LEN        17      /* 16 + '\0' */
   42 
   43 struct iscsi_outstanding {
   44         TAILQ_ENTRY(iscsi_outstanding)  io_next;
   45         union ccb                       *io_ccb;
   46         size_t                          io_received;
   47         uint32_t                        io_datasn;
   48         uint32_t                        io_initiator_task_tag;
   49         uint32_t                        io_referenced_task_tag;
   50         void                            *io_icl_prv;
   51 };
   52 
   53 struct iscsi_session {
   54         TAILQ_ENTRY(iscsi_session)      is_next;
   55 
   56         struct icl_conn                 *is_conn;
   57         struct mtx                      is_lock;
   58 
   59         uint32_t                        is_statsn;
   60         uint32_t                        is_cmdsn;
   61         uint32_t                        is_expcmdsn;
   62         uint32_t                        is_maxcmdsn;
   63         uint32_t                        is_initiator_task_tag;
   64         int                             is_protocol_level;
   65         int                             is_initial_r2t;
   66         int                             is_max_burst_length;
   67         int                             is_first_burst_length;
   68         uint8_t                         is_isid[6];
   69         uint16_t                        is_tsih;
   70         bool                            is_immediate_data;
   71         char                            is_target_alias[ISCSI_ALIAS_LEN];
   72 
   73         TAILQ_HEAD(, iscsi_outstanding) is_outstanding;
   74         STAILQ_HEAD(, icl_pdu)          is_postponed;
   75 
   76         struct callout                  is_callout;
   77         unsigned int                    is_timeout;
   78         int                             is_ping_timeout;
   79         int                             is_login_timeout;
   80 
   81         /*
   82          * XXX: This could be rewritten using a single variable,
   83          *      but somehow it results in uglier code. 
   84          */
   85         /*
   86          * We're waiting for iscsid(8); after iscsid_timeout
   87          * expires, kernel will wake up an iscsid(8) to handle
   88          * the session.
   89          */
   90         bool                            is_waiting_for_iscsid;
   91 
   92         /*
   93          * Some iscsid(8) instance is handling the session;
   94          * after login_timeout expires, kernel will wake up
   95          * another iscsid(8) to handle the session.
   96          */
   97         bool                            is_login_phase;
   98 
   99         /*
  100          * We're in the process of removing the iSCSI session.
  101          */
  102         bool                            is_terminating;
  103 
  104         /*
  105          * We're waiting for the maintenance thread to do some
  106          * reconnection tasks.
  107          */
  108         bool                            is_reconnecting;
  109 
  110         bool                            is_connected;
  111 
  112         struct cam_devq                 *is_devq;
  113         struct cam_sim                  *is_sim;
  114         struct cam_path                 *is_path;
  115         struct cv                       is_maintenance_cv;
  116         struct iscsi_softc              *is_softc;
  117         unsigned int                    is_id;
  118         struct iscsi_session_conf       is_conf;
  119         bool                            is_simq_frozen;
  120 
  121         char                            is_reason[ISCSI_REASON_LEN];
  122 
  123 #ifdef ICL_KERNEL_PROXY
  124         struct cv                       is_login_cv;
  125         struct icl_pdu                  *is_login_pdu;
  126 #endif
  127 };
  128 
  129 struct iscsi_softc {
  130         device_t                        sc_dev;
  131         struct sx                       sc_lock;
  132         struct cdev                     *sc_cdev;
  133         TAILQ_HEAD(, iscsi_session)     sc_sessions;
  134         struct cv                       sc_cv;
  135         unsigned int                    sc_last_session_id;
  136         bool                            sc_unloading;
  137         eventhandler_tag                sc_shutdown_pre_eh;
  138         eventhandler_tag                sc_shutdown_post_eh;
  139 };
  140 
  141 #endif /* !ISCSI_H */

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FreeBSD/Linux Kernel Cross Reference sys/dev/iscsi/iscsi.h

FreeBSD/Linux Kernel Cross Reference
sys/dev/iscsi/iscsi.h