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_OFFLOAD_LEN 8 47 #define ISCSI_REASON_LEN 64 48 49 #define ISCSI_DIGEST_NONE 0 50 #define ISCSI_DIGEST_CRC32C 1 51 52 /* 53 * Session configuration, set when adding the session. 54 */ 55 struct iscsi_session_conf { 56 char isc_initiator[ISCSI_NAME_LEN]; 57 char isc_initiator_addr[ISCSI_ADDR_LEN]; 58 char isc_initiator_alias[ISCSI_ALIAS_LEN]; 59 char isc_target[ISCSI_NAME_LEN]; 60 char isc_target_addr[ISCSI_ADDR_LEN]; 61 char isc_user[ISCSI_NAME_LEN]; 62 char isc_secret[ISCSI_SECRET_LEN]; 63 char isc_mutual_user[ISCSI_NAME_LEN]; 64 char isc_mutual_secret[ISCSI_SECRET_LEN]; 65 int isc_discovery; 66 int isc_header_digest; 67 int isc_data_digest; 68 int isc_iser; 69 char isc_offload[ISCSI_OFFLOAD_LEN]; 70 int isc_enable; 71 int isc_spare[4]; 72 }; 73 74 /* 75 * Additional constraints imposed by chosen ICL offload module; 76 * iscsid(8) must obey those when negotiating operational parameters. 77 */ 78 struct iscsi_session_limits { 79 size_t isl_max_data_segment_length; 80 int isl_spare[8]; 81 }; 82 83 /* 84 * Session state, negotiated by iscsid(8) and queried by iscsictl(8). 85 */ 86 struct iscsi_session_state { 87 struct iscsi_session_conf iss_conf; 88 unsigned int iss_id; 89 char iss_target_alias[ISCSI_ALIAS_LEN]; 90 int iss_header_digest; 91 int iss_data_digest; 92 int iss_max_data_segment_length; 93 int iss_max_burst_length; 94 int iss_first_burst_length; 95 int iss_immediate_data; 96 int iss_connected; 97 char iss_reason[ISCSI_REASON_LEN]; 98 char iss_offload[ISCSI_OFFLOAD_LEN]; 99 int iss_spare[4]; 100 }; 101 102 /* 103 * The following ioctls are used by iscsid(8). 104 */ 105 struct iscsi_daemon_request { 106 unsigned int idr_session_id; 107 struct iscsi_session_conf idr_conf; 108 uint8_t idr_isid[6]; 109 uint16_t idr_tsih; 110 uint16_t idr_spare_cid; 111 struct iscsi_session_limits idr_limits; 112 int idr_spare[4]; 113 }; 114 115 struct iscsi_daemon_handoff { 116 unsigned int idh_session_id; 117 int idh_socket; 118 char idh_target_alias[ISCSI_ALIAS_LEN]; 119 uint8_t idh_spare_isid[6]; 120 uint16_t idh_tsih; 121 uint16_t idh_spare_cid; 122 uint32_t idh_statsn; 123 int idh_header_digest; 124 int idh_data_digest; 125 size_t idh_max_data_segment_length; 126 size_t idh_max_burst_length; 127 size_t idh_first_burst_length; 128 int idh_immediate_data; 129 int idh_initial_r2t; 130 int idh_spare[4]; 131 }; 132 133 struct iscsi_daemon_fail { 134 unsigned int idf_session_id; 135 char idf_reason[ISCSI_REASON_LEN]; 136 int idf_spare[4]; 137 }; 138 139 #define ISCSIDWAIT _IOR('I', 0x01, struct iscsi_daemon_request) 140 #define ISCSIDHANDOFF _IOW('I', 0x02, struct iscsi_daemon_handoff) 141 #define ISCSIDFAIL _IOW('I', 0x03, struct iscsi_daemon_fail) 142 143 #ifdef ICL_KERNEL_PROXY 144 145 /* 146 * When ICL_KERNEL_PROXY is not defined, the iscsid(8) is responsible 147 * for creating the socket, connecting, and performing Login Phase using 148 * the socket in the usual userspace way, and then passing the socket 149 * file descriptor to the kernel part using ISCSIDHANDOFF. 150 * 151 * When ICL_KERNEL_PROXY is defined, the iscsid(8) creates the session 152 * using ISCSICONNECT, performs Login Phase using ISCSISEND/ISCSIRECEIVE 153 * instead of read(2)/write(2), and then calls ISCSIDHANDOFF with 154 * idh_socket set to 0. 155 * 156 * The purpose of ICL_KERNEL_PROXY is to workaround the fact that, 157 * at this time, it's not possible to do iWARP (RDMA) in userspace. 158 */ 159 160 struct iscsi_daemon_connect { 161 unsigned int idc_session_id; 162 int idc_iser; 163 int idc_domain; 164 int idc_socktype; 165 int idc_protocol; 166 struct sockaddr *idc_from_addr; 167 socklen_t idc_from_addrlen; 168 struct sockaddr *idc_to_addr; 169 socklen_t idc_to_addrlen; 170 int idc_spare[4]; 171 }; 172 173 struct iscsi_daemon_send { 174 unsigned int ids_session_id; 175 void *ids_bhs; 176 size_t ids_spare; 177 void *ids_spare2; 178 size_t ids_data_segment_len; 179 void *ids_data_segment; 180 int ids_spare3[4]; 181 }; 182 183 struct iscsi_daemon_receive { 184 unsigned int idr_session_id; 185 void *idr_bhs; 186 size_t idr_spare; 187 void *idr_spare2; 188 size_t idr_data_segment_len; 189 void *idr_data_segment; 190 int idr_spare3[4]; 191 }; 192 193 #define ISCSIDCONNECT _IOWR('I', 0x04, struct iscsi_daemon_connect) 194 #define ISCSIDSEND _IOWR('I', 0x05, struct iscsi_daemon_send) 195 #define ISCSIDRECEIVE _IOWR('I', 0x06, struct iscsi_daemon_receive) 196 197 #endif /* ICL_KERNEL_PROXY */ 198 199 /* 200 * The following ioctls are used by iscsictl(8). 201 */ 202 struct iscsi_session_add { 203 struct iscsi_session_conf isa_conf; 204 int isa_spare[4]; 205 }; 206 207 struct iscsi_session_remove { 208 unsigned int isr_session_id; 209 struct iscsi_session_conf isr_conf; 210 int isr_spare[4]; 211 }; 212 213 struct iscsi_session_list { 214 unsigned int isl_nentries; 215 struct iscsi_session_state *isl_pstates; 216 int isl_spare[4]; 217 }; 218 219 struct iscsi_session_modify { 220 unsigned int ism_session_id; 221 struct iscsi_session_conf ism_conf; 222 int ism_spare[4]; 223 }; 224 225 #define ISCSISADD _IOW('I', 0x11, struct iscsi_session_add) 226 #define ISCSISREMOVE _IOW('I', 0x12, struct iscsi_session_remove) 227 #define ISCSISLIST _IOWR('I', 0x13, struct iscsi_session_list) 228 #define ISCSISMODIFY _IOWR('I', 0x14, struct iscsi_session_modify) 229 230 #endif /* !ISCSI_IOCTL_H */ 231