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