1/* 2 * iSCSI User/Kernel Shares (Defines, Constants, Protocol definitions, etc) 3 * 4 * Copyright (C) 2005 Dmitry Yusupov 5 * Copyright (C) 2005 Alex Aizman 6 * maintained by open-iscsi@googlegroups.com 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published 10 * by the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, but 14 * WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * General Public License for more details. 17 * 18 * See the file COPYING included with this distribution for more details. 19 */ 20 21#ifndef ISCSI_IF_H 22#define ISCSI_IF_H 23 24#include <scsi/iscsi_proto.h> 25#include <linux/in.h> 26#include <linux/in6.h> 27 28#define ISCSI_NL_GRP_ISCSID 1 29#define ISCSI_NL_GRP_UIP 2 30 31#define UEVENT_BASE 10 32#define KEVENT_BASE 100 33#define ISCSI_ERR_BASE 1000 34 35enum iscsi_uevent_e { 36 ISCSI_UEVENT_UNKNOWN = 0, 37 38 /* down events */ 39 ISCSI_UEVENT_CREATE_SESSION = UEVENT_BASE + 1, 40 ISCSI_UEVENT_DESTROY_SESSION = UEVENT_BASE + 2, 41 ISCSI_UEVENT_CREATE_CONN = UEVENT_BASE + 3, 42 ISCSI_UEVENT_DESTROY_CONN = UEVENT_BASE + 4, 43 ISCSI_UEVENT_BIND_CONN = UEVENT_BASE + 5, 44 ISCSI_UEVENT_SET_PARAM = UEVENT_BASE + 6, 45 ISCSI_UEVENT_START_CONN = UEVENT_BASE + 7, 46 ISCSI_UEVENT_STOP_CONN = UEVENT_BASE + 8, 47 ISCSI_UEVENT_SEND_PDU = UEVENT_BASE + 9, 48 ISCSI_UEVENT_GET_STATS = UEVENT_BASE + 10, 49 ISCSI_UEVENT_GET_PARAM = UEVENT_BASE + 11, 50 51 ISCSI_UEVENT_TRANSPORT_EP_CONNECT = UEVENT_BASE + 12, 52 ISCSI_UEVENT_TRANSPORT_EP_POLL = UEVENT_BASE + 13, 53 ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT = UEVENT_BASE + 14, 54 55 ISCSI_UEVENT_TGT_DSCVR = UEVENT_BASE + 15, 56 ISCSI_UEVENT_SET_HOST_PARAM = UEVENT_BASE + 16, 57 ISCSI_UEVENT_UNBIND_SESSION = UEVENT_BASE + 17, 58 ISCSI_UEVENT_CREATE_BOUND_SESSION = UEVENT_BASE + 18, 59 ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST = UEVENT_BASE + 19, 60 61 ISCSI_UEVENT_PATH_UPDATE = UEVENT_BASE + 20, 62 63 /* up events */ 64 ISCSI_KEVENT_RECV_PDU = KEVENT_BASE + 1, 65 ISCSI_KEVENT_CONN_ERROR = KEVENT_BASE + 2, 66 ISCSI_KEVENT_IF_ERROR = KEVENT_BASE + 3, 67 ISCSI_KEVENT_DESTROY_SESSION = KEVENT_BASE + 4, 68 ISCSI_KEVENT_UNBIND_SESSION = KEVENT_BASE + 5, 69 ISCSI_KEVENT_CREATE_SESSION = KEVENT_BASE + 6, 70 71 ISCSI_KEVENT_PATH_REQ = KEVENT_BASE + 7, 72 ISCSI_KEVENT_IF_DOWN = KEVENT_BASE + 8, 73}; 74 75enum iscsi_tgt_dscvr { 76 ISCSI_TGT_DSCVR_SEND_TARGETS = 1, 77 ISCSI_TGT_DSCVR_ISNS = 2, 78 ISCSI_TGT_DSCVR_SLP = 3, 79}; 80 81struct iscsi_uevent { 82 uint32_t type; /* k/u events type */ 83 uint32_t iferror; /* carries interface or resource errors */ 84 uint64_t transport_handle; 85 86 union { 87 /* messages u -> k */ 88 struct msg_create_session { 89 uint32_t initial_cmdsn; 90 uint16_t cmds_max; 91 uint16_t queue_depth; 92 } c_session; 93 struct msg_create_bound_session { 94 uint64_t ep_handle; 95 uint32_t initial_cmdsn; 96 uint16_t cmds_max; 97 uint16_t queue_depth; 98 } c_bound_session; 99 struct msg_destroy_session { 100 uint32_t sid; 101 } d_session; 102 struct msg_create_conn { 103 uint32_t sid; 104 uint32_t cid; 105 } c_conn; 106 struct msg_bind_conn { 107 uint32_t sid; 108 uint32_t cid; 109 uint64_t transport_eph; 110 uint32_t is_leading; 111 } b_conn; 112 struct msg_destroy_conn { 113 uint32_t sid; 114 uint32_t cid; 115 } d_conn; 116 struct msg_send_pdu { 117 uint32_t sid; 118 uint32_t cid; 119 uint32_t hdr_size; 120 uint32_t data_size; 121 } send_pdu; 122 struct msg_set_param { 123 uint32_t sid; 124 uint32_t cid; 125 uint32_t param; /* enum iscsi_param */ 126 uint32_t len; 127 } set_param; 128 struct msg_start_conn { 129 uint32_t sid; 130 uint32_t cid; 131 } start_conn; 132 struct msg_stop_conn { 133 uint32_t sid; 134 uint32_t cid; 135 uint64_t conn_handle; 136 uint32_t flag; 137 } stop_conn; 138 struct msg_get_stats { 139 uint32_t sid; 140 uint32_t cid; 141 } get_stats; 142 struct msg_transport_connect { 143 uint32_t non_blocking; 144 } ep_connect; 145 struct msg_transport_connect_through_host { 146 uint32_t host_no; 147 uint32_t non_blocking; 148 } ep_connect_through_host; 149 struct msg_transport_poll { 150 uint64_t ep_handle; 151 uint32_t timeout_ms; 152 } ep_poll; 153 struct msg_transport_disconnect { 154 uint64_t ep_handle; 155 } ep_disconnect; 156 struct msg_tgt_dscvr { 157 enum iscsi_tgt_dscvr type; 158 uint32_t host_no; 159 /* 160 * enable = 1 to establish a new connection 161 * with the server. enable = 0 to disconnect 162 * from the server. Used primarily to switch 163 * from one iSNS server to another. 164 */ 165 uint32_t enable; 166 } tgt_dscvr; 167 struct msg_set_host_param { 168 uint32_t host_no; 169 uint32_t param; /* enum iscsi_host_param */ 170 uint32_t len; 171 } set_host_param; 172 struct msg_set_path { 173 uint32_t host_no; 174 } set_path; 175 } u; 176 union { 177 /* messages k -> u */ 178 int retcode; 179 struct msg_create_session_ret { 180 uint32_t sid; 181 uint32_t host_no; 182 } c_session_ret; 183 struct msg_create_conn_ret { 184 uint32_t sid; 185 uint32_t cid; 186 } c_conn_ret; 187 struct msg_unbind_session { 188 uint32_t sid; 189 uint32_t host_no; 190 } unbind_session; 191 struct msg_recv_req { 192 uint32_t sid; 193 uint32_t cid; 194 uint64_t recv_handle; 195 } recv_req; 196 struct msg_conn_error { 197 uint32_t sid; 198 uint32_t cid; 199 uint32_t error; /* enum iscsi_err */ 200 } connerror; 201 struct msg_session_destroyed { 202 uint32_t host_no; 203 uint32_t sid; 204 } d_session; 205 struct msg_transport_connect_ret { 206 uint64_t handle; 207 } ep_connect_ret; 208 struct msg_req_path { 209 uint32_t host_no; 210 } req_path; 211 struct msg_notify_if_down { 212 uint32_t host_no; 213 } notify_if_down; 214 } r; 215} __attribute__ ((aligned (sizeof(uint64_t)))); 216 217/* 218 * To keep the struct iscsi_uevent size the same for userspace code 219 * compatibility, the main structure for ISCSI_UEVENT_PATH_UPDATE and 220 * ISCSI_KEVENT_PATH_REQ is defined separately and comes after the 221 * struct iscsi_uevent in the NETLINK_ISCSI message. 222 */ 223struct iscsi_path { 224 uint64_t handle; 225 uint8_t mac_addr[6]; 226 uint8_t mac_addr_old[6]; 227 uint32_t ip_addr_len; /* 4 or 16 */ 228 union { 229 struct in_addr v4_addr; 230 struct in6_addr v6_addr; 231 } src; 232 union { 233 struct in_addr v4_addr; 234 struct in6_addr v6_addr; 235 } dst; 236 uint16_t vlan_id; 237 uint16_t pmtu; 238} __attribute__ ((aligned (sizeof(uint64_t)))); 239 240/* 241 * Common error codes 242 */ 243enum iscsi_err { 244 ISCSI_OK = 0, 245 246 ISCSI_ERR_DATASN = ISCSI_ERR_BASE + 1, 247 ISCSI_ERR_DATA_OFFSET = ISCSI_ERR_BASE + 2, 248 ISCSI_ERR_MAX_CMDSN = ISCSI_ERR_BASE + 3, 249 ISCSI_ERR_EXP_CMDSN = ISCSI_ERR_BASE + 4, 250 ISCSI_ERR_BAD_OPCODE = ISCSI_ERR_BASE + 5, 251 ISCSI_ERR_DATALEN = ISCSI_ERR_BASE + 6, 252 ISCSI_ERR_AHSLEN = ISCSI_ERR_BASE + 7, 253 ISCSI_ERR_PROTO = ISCSI_ERR_BASE + 8, 254 ISCSI_ERR_LUN = ISCSI_ERR_BASE + 9, 255 ISCSI_ERR_BAD_ITT = ISCSI_ERR_BASE + 10, 256 ISCSI_ERR_CONN_FAILED = ISCSI_ERR_BASE + 11, 257 ISCSI_ERR_R2TSN = ISCSI_ERR_BASE + 12, 258 ISCSI_ERR_SESSION_FAILED = ISCSI_ERR_BASE + 13, 259 ISCSI_ERR_HDR_DGST = ISCSI_ERR_BASE + 14, 260 ISCSI_ERR_DATA_DGST = ISCSI_ERR_BASE + 15, 261 ISCSI_ERR_PARAM_NOT_FOUND = ISCSI_ERR_BASE + 16, 262 ISCSI_ERR_NO_SCSI_CMD = ISCSI_ERR_BASE + 17, 263 ISCSI_ERR_INVALID_HOST = ISCSI_ERR_BASE + 18, 264 ISCSI_ERR_XMIT_FAILED = ISCSI_ERR_BASE + 19, 265 ISCSI_ERR_TCP_CONN_CLOSE = ISCSI_ERR_BASE + 20, 266}; 267 268/* 269 * iSCSI Parameters (RFC3720) 270 */ 271enum iscsi_param { 272 /* passed in using netlink set param */ 273 ISCSI_PARAM_MAX_RECV_DLENGTH, 274 ISCSI_PARAM_MAX_XMIT_DLENGTH, 275 ISCSI_PARAM_HDRDGST_EN, 276 ISCSI_PARAM_DATADGST_EN, 277 ISCSI_PARAM_INITIAL_R2T_EN, 278 ISCSI_PARAM_MAX_R2T, 279 ISCSI_PARAM_IMM_DATA_EN, 280 ISCSI_PARAM_FIRST_BURST, 281 ISCSI_PARAM_MAX_BURST, 282 ISCSI_PARAM_PDU_INORDER_EN, 283 ISCSI_PARAM_DATASEQ_INORDER_EN, 284 ISCSI_PARAM_ERL, 285 ISCSI_PARAM_IFMARKER_EN, 286 ISCSI_PARAM_OFMARKER_EN, 287 ISCSI_PARAM_EXP_STATSN, 288 ISCSI_PARAM_TARGET_NAME, 289 ISCSI_PARAM_TPGT, 290 ISCSI_PARAM_PERSISTENT_ADDRESS, 291 ISCSI_PARAM_PERSISTENT_PORT, 292 ISCSI_PARAM_SESS_RECOVERY_TMO, 293 294 /* pased in through bind conn using transport_fd */ 295 ISCSI_PARAM_CONN_PORT, 296 ISCSI_PARAM_CONN_ADDRESS, 297 298 ISCSI_PARAM_USERNAME, 299 ISCSI_PARAM_USERNAME_IN, 300 ISCSI_PARAM_PASSWORD, 301 ISCSI_PARAM_PASSWORD_IN, 302 303 ISCSI_PARAM_FAST_ABORT, 304 ISCSI_PARAM_ABORT_TMO, 305 ISCSI_PARAM_LU_RESET_TMO, 306 ISCSI_PARAM_HOST_RESET_TMO, 307 308 ISCSI_PARAM_PING_TMO, 309 ISCSI_PARAM_RECV_TMO, 310 311 ISCSI_PARAM_IFACE_NAME, 312 ISCSI_PARAM_ISID, 313 ISCSI_PARAM_INITIATOR_NAME, 314 315 ISCSI_PARAM_TGT_RESET_TMO, 316 ISCSI_PARAM_TARGET_ALIAS, 317 /* must always be last */ 318 ISCSI_PARAM_MAX, 319}; 320 321#define ISCSI_MAX_RECV_DLENGTH (1ULL << ISCSI_PARAM_MAX_RECV_DLENGTH) 322#define ISCSI_MAX_XMIT_DLENGTH (1ULL << ISCSI_PARAM_MAX_XMIT_DLENGTH) 323#define ISCSI_HDRDGST_EN (1ULL << ISCSI_PARAM_HDRDGST_EN) 324#define ISCSI_DATADGST_EN (1ULL << ISCSI_PARAM_DATADGST_EN) 325#define ISCSI_INITIAL_R2T_EN (1ULL << ISCSI_PARAM_INITIAL_R2T_EN) 326#define ISCSI_MAX_R2T (1ULL << ISCSI_PARAM_MAX_R2T) 327#define ISCSI_IMM_DATA_EN (1ULL << ISCSI_PARAM_IMM_DATA_EN) 328#define ISCSI_FIRST_BURST (1ULL << ISCSI_PARAM_FIRST_BURST) 329#define ISCSI_MAX_BURST (1ULL << ISCSI_PARAM_MAX_BURST) 330#define ISCSI_PDU_INORDER_EN (1ULL << ISCSI_PARAM_PDU_INORDER_EN) 331#define ISCSI_DATASEQ_INORDER_EN (1ULL << ISCSI_PARAM_DATASEQ_INORDER_EN) 332#define ISCSI_ERL (1ULL << ISCSI_PARAM_ERL) 333#define ISCSI_IFMARKER_EN (1ULL << ISCSI_PARAM_IFMARKER_EN) 334#define ISCSI_OFMARKER_EN (1ULL << ISCSI_PARAM_OFMARKER_EN) 335#define ISCSI_EXP_STATSN (1ULL << ISCSI_PARAM_EXP_STATSN) 336#define ISCSI_TARGET_NAME (1ULL << ISCSI_PARAM_TARGET_NAME) 337#define ISCSI_TPGT (1ULL << ISCSI_PARAM_TPGT) 338#define ISCSI_PERSISTENT_ADDRESS (1ULL << ISCSI_PARAM_PERSISTENT_ADDRESS) 339#define ISCSI_PERSISTENT_PORT (1ULL << ISCSI_PARAM_PERSISTENT_PORT) 340#define ISCSI_SESS_RECOVERY_TMO (1ULL << ISCSI_PARAM_SESS_RECOVERY_TMO) 341#define ISCSI_CONN_PORT (1ULL << ISCSI_PARAM_CONN_PORT) 342#define ISCSI_CONN_ADDRESS (1ULL << ISCSI_PARAM_CONN_ADDRESS) 343#define ISCSI_USERNAME (1ULL << ISCSI_PARAM_USERNAME) 344#define ISCSI_USERNAME_IN (1ULL << ISCSI_PARAM_USERNAME_IN) 345#define ISCSI_PASSWORD (1ULL << ISCSI_PARAM_PASSWORD) 346#define ISCSI_PASSWORD_IN (1ULL << ISCSI_PARAM_PASSWORD_IN) 347#define ISCSI_FAST_ABORT (1ULL << ISCSI_PARAM_FAST_ABORT) 348#define ISCSI_ABORT_TMO (1ULL << ISCSI_PARAM_ABORT_TMO) 349#define ISCSI_LU_RESET_TMO (1ULL << ISCSI_PARAM_LU_RESET_TMO) 350#define ISCSI_HOST_RESET_TMO (1ULL << ISCSI_PARAM_HOST_RESET_TMO) 351#define ISCSI_PING_TMO (1ULL << ISCSI_PARAM_PING_TMO) 352#define ISCSI_RECV_TMO (1ULL << ISCSI_PARAM_RECV_TMO) 353#define ISCSI_IFACE_NAME (1ULL << ISCSI_PARAM_IFACE_NAME) 354#define ISCSI_ISID (1ULL << ISCSI_PARAM_ISID) 355#define ISCSI_INITIATOR_NAME (1ULL << ISCSI_PARAM_INITIATOR_NAME) 356#define ISCSI_TGT_RESET_TMO (1ULL << ISCSI_PARAM_TGT_RESET_TMO) 357#define ISCSI_TARGET_ALIAS (1ULL << ISCSI_PARAM_TARGET_ALIAS) 358 359/* iSCSI HBA params */ 360enum iscsi_host_param { 361 ISCSI_HOST_PARAM_HWADDRESS, 362 ISCSI_HOST_PARAM_INITIATOR_NAME, 363 ISCSI_HOST_PARAM_NETDEV_NAME, 364 ISCSI_HOST_PARAM_IPADDRESS, 365 ISCSI_HOST_PARAM_MAX, 366}; 367 368#define ISCSI_HOST_HWADDRESS (1ULL << ISCSI_HOST_PARAM_HWADDRESS) 369#define ISCSI_HOST_INITIATOR_NAME (1ULL << ISCSI_HOST_PARAM_INITIATOR_NAME) 370#define ISCSI_HOST_NETDEV_NAME (1ULL << ISCSI_HOST_PARAM_NETDEV_NAME) 371#define ISCSI_HOST_IPADDRESS (1ULL << ISCSI_HOST_PARAM_IPADDRESS) 372 373#define iscsi_ptr(_handle) ((void*)(unsigned long)_handle) 374#define iscsi_handle(_ptr) ((uint64_t)(unsigned long)_ptr) 375 376/* 377 * These flags presents iSCSI Data-Path capabilities. 378 */ 379#define CAP_RECOVERY_L0 0x1 380#define CAP_RECOVERY_L1 0x2 381#define CAP_RECOVERY_L2 0x4 382#define CAP_MULTI_R2T 0x8 383#define CAP_HDRDGST 0x10 384#define CAP_DATADGST 0x20 385#define CAP_MULTI_CONN 0x40 386#define CAP_TEXT_NEGO 0x80 387#define CAP_MARKERS 0x100 388#define CAP_FW_DB 0x200 389#define CAP_SENDTARGETS_OFFLOAD 0x400 /* offload discovery process */ 390#define CAP_DATA_PATH_OFFLOAD 0x800 /* offload entire IO path */ 391#define CAP_DIGEST_OFFLOAD 0x1000 /* offload hdr and data digests */ 392#define CAP_PADDING_OFFLOAD 0x2000 /* offload padding insertion, removal, 393 and verification */ 394 395/* 396 * These flags describes reason of stop_conn() call 397 */ 398#define STOP_CONN_TERM 0x1 399#define STOP_CONN_SUSPEND 0x2 400#define STOP_CONN_RECOVER 0x3 401 402#define ISCSI_STATS_CUSTOM_MAX 32 403#define ISCSI_STATS_CUSTOM_DESC_MAX 64 404struct iscsi_stats_custom { 405 char desc[ISCSI_STATS_CUSTOM_DESC_MAX]; 406 uint64_t value; 407}; 408 409/* 410 * struct iscsi_stats - iSCSI Statistics (iSCSI MIB) 411 * 412 * Note: this structure contains counters collected on per-connection basis. 413 */ 414struct iscsi_stats { 415 /* octets */ 416 uint64_t txdata_octets; 417 uint64_t rxdata_octets; 418 419 /* xmit pdus */ 420 uint32_t noptx_pdus; 421 uint32_t scsicmd_pdus; 422 uint32_t tmfcmd_pdus; 423 uint32_t login_pdus; 424 uint32_t text_pdus; 425 uint32_t dataout_pdus; 426 uint32_t logout_pdus; 427 uint32_t snack_pdus; 428 429 /* recv pdus */ 430 uint32_t noprx_pdus; 431 uint32_t scsirsp_pdus; 432 uint32_t tmfrsp_pdus; 433 uint32_t textrsp_pdus; 434 uint32_t datain_pdus; 435 uint32_t logoutrsp_pdus; 436 uint32_t r2t_pdus; 437 uint32_t async_pdus; 438 uint32_t rjt_pdus; 439 440 /* errors */ 441 uint32_t digest_err; 442 uint32_t timeout_err; 443 444 /* 445 * iSCSI Custom Statistics support, i.e. Transport could 446 * extend existing MIB statistics with its own specific statistics 447 * up to ISCSI_STATS_CUSTOM_MAX 448 */ 449 uint32_t custom_length; 450 struct iscsi_stats_custom custom[0] 451 __attribute__ ((aligned (sizeof(uint64_t)))); 452}; 453 454#endif 455