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_IOCTL_H 33 #define ISCSI_IOCTL_H 34 35 #ifdef ICL_KERNEL_PROXY 36 #include <sys/socket.h> 37 #endif 38 39 #define ISCSI_PATH "/dev/iscsi" 40 #define ISCSI_MAX_DATA_SEGMENT_LENGTH (128 * 1024) 41 42 #define ISCSI_NAME_LEN 224 /* 223 bytes, by RFC 3720, + '\0' */ 43 #define ISCSI_ADDR_LEN 47 /* INET6_ADDRSTRLEN + '\0' */ 44 #define ISCSI_ALIAS_LEN 256 /* XXX: Where did it come from? */ 45 #define ISCSI_SECRET_LEN 17 /* 16 + '\0' */ 46 #define ISCSI_REASON_LEN 64 47 48 #define ISCSI_DIGEST_NONE 0 49 #define ISCSI_DIGEST_CRC32C 1 50 51 /* 52 * Session configuration, set when adding the session. 53 */ 54 struct iscsi_session_conf { 55 char isc_initiator[ISCSI_NAME_LEN]; 56 char isc_initiator_addr[ISCSI_ADDR_LEN]; 57 char isc_initiator_alias[ISCSI_ALIAS_LEN]; 58 char isc_target[ISCSI_NAME_LEN]; 59 char isc_target_addr[ISCSI_ADDR_LEN]; 60 char isc_user[ISCSI_NAME_LEN]; 61 char isc_secret[ISCSI_SECRET_LEN]; 62 char isc_mutual_user[ISCSI_NAME_LEN]; 63 char isc_mutual_secret[ISCSI_SECRET_LEN]; 64 int isc_discovery; 65 int isc_header_digest; 66 int isc_data_digest; 67 int isc_iser; 68 int isc_spare[4]; 69 }; 70 71 /* 72 * Session state, negotiated by iscsid(8) and queried by iscsictl(8). 73 */ 74 struct iscsi_session_state { 75 struct iscsi_session_conf iss_conf; 76 unsigned int iss_id; 77 char iss_target_alias[ISCSI_ALIAS_LEN]; 78 int iss_header_digest; 79 int iss_data_digest; 80 int iss_max_data_segment_length; 81 int iss_immediate_data; 82 int iss_connected; 83 char iss_reason[ISCSI_REASON_LEN]; 84 int iss_spare[4]; 85 }; 86 87 /* 88 * For use with iscsid(8). 89 */ 90 91 struct iscsi_daemon_request { 92 unsigned int idr_session_id; 93 struct iscsi_session_conf idr_conf; 94 uint8_t idr_spare_isid[6]; 95 uint16_t idr_spare_tsih; 96 uint16_t idr_spare_cid; 97 int idr_spare[4]; 98 }; 99 100 struct iscsi_daemon_handoff { 101 unsigned int idh_session_id; 102 int idh_socket; 103 char idh_target_alias[ISCSI_ALIAS_LEN]; 104 uint8_t idh_isid[6]; 105 uint16_t idr_spare_tsih; 106 uint16_t idr_spare_cid; 107 uint32_t idh_statsn; 108 int idh_header_digest; 109 int idh_data_digest; 110 int idh_initial_r2t; 111 int idh_immediate_data; 112 size_t idh_max_data_segment_length; 113 size_t idh_max_burst_length; 114 size_t idh_first_burst_length; 115 int idh_spare[4]; 116 }; 117 118 struct iscsi_daemon_fail { 119 unsigned int idf_session_id; 120 char idf_reason[ISCSI_REASON_LEN]; 121 int idf_spare[4]; 122 }; 123 124 #define ISCSIDWAIT _IOR('I', 0x01, struct iscsi_daemon_request) 125 #define ISCSIDHANDOFF _IOW('I', 0x02, struct iscsi_daemon_handoff) 126 #define ISCSIDFAIL _IOW('I', 0x03, struct iscsi_daemon_fail) 127 128 #ifdef ICL_KERNEL_PROXY 129 130 /* 131 * When ICL_KERNEL_PROXY is not defined, the iscsid(8) is responsible 132 * for creating the socket, connecting, and performing Login Phase using 133 * the socket in the usual userspace way, and then passing the socket 134 * file descriptor to the kernel part using ISCSIDHANDOFF. 135 * 136 * When ICL_KERNEL_PROXY is defined, the iscsid(8) creates the session 137 * using ISCSICONNECT, performs Login Phase using ISCSISEND/ISCSIRECEIVE 138 * instead of read(2)/write(2), and then calls ISCSIDHANDOFF with 139 * idh_socket set to 0. 140 * 141 * The purpose of ICL_KERNEL_PROXY is to workaround the fact that, 142 * at this time, it's not possible to do iWARP (RDMA) in userspace. 143 */ 144 145 struct iscsi_daemon_connect { 146 int idc_session_id; 147 int idc_iser; 148 int idc_domain; 149 int idc_socktype; 150 int idc_protocol; 151 struct sockaddr *idc_from_addr; 152 socklen_t idc_from_addrlen; 153 struct sockaddr *idc_to_addr; 154 socklen_t idc_to_addrlen; 155 int idc_spare[4]; 156 }; 157 158 struct iscsi_daemon_send { 159 int ids_session_id; 160 void *ids_bhs; 161 size_t ids_spare; 162 void *ids_spare2; 163 size_t ids_data_segment_len; 164 void *ids_data_segment; 165 int ids_spare3[4]; 166 }; 167 168 struct iscsi_daemon_receive { 169 int idr_session_id; 170 void *idr_bhs; 171 size_t idr_spare; 172 void *idr_spare2; 173 size_t idr_data_segment_len; 174 void *idr_data_segment; 175 int idr_spare3[4]; 176 }; 177 178 #define ISCSIDCONNECT _IOWR('I', 0x04, struct iscsi_daemon_connect) 179 #define ISCSIDSEND _IOWR('I', 0x05, struct iscsi_daemon_send) 180 #define ISCSIDRECEIVE _IOWR('I', 0x06, struct iscsi_daemon_receive) 181 182 #endif /* ICL_KERNEL_PROXY */ 183 184 /* 185 * For use with iscsictl(8). 186 */ 187 188 struct iscsi_session_add { 189 struct iscsi_session_conf isa_conf; 190 int isa_spare[4]; 191 }; 192 193 struct iscsi_session_remove { 194 unsigned int isr_session_id; 195 struct iscsi_session_conf isr_conf; 196 int isr_spare[4]; 197 }; 198 199 struct iscsi_session_list { 200 unsigned int isl_nentries; 201 struct iscsi_session_state *isl_pstates; 202 int isl_spare[4]; 203 }; 204 205 #define ISCSISADD _IOW('I', 0x11, struct iscsi_session_add) 206 #define ISCSISREMOVE _IOW('I', 0x12, struct iscsi_session_remove) 207 #define ISCSISLIST _IOWR('I', 0x13, struct iscsi_session_list) 208 209 #endif /* !ISCSI_IOCTL_H */ 210