1 /* 2 * RFC 3720 (iSCSI) protocol data types 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_PROTO_H 22 #define ISCSI_PROTO_H 23 24 #include <linux/types.h> 25 #include <scsi/scsi.h> 26 27 #define ISCSI_DRAFT20_VERSION 0x00 28 29 /* default iSCSI listen port for incoming connections */ 30 #define ISCSI_LISTEN_PORT 3260 31 32 /* Padding word length */ 33 #define ISCSI_PAD_LEN 4 34 35 /* 36 * useful common(control and data pathes) macro 37 */ 38 #define ntoh24(p) (((p)[0] << 16) | ((p)[1] << 8) | ((p)[2])) 39 #define hton24(p, v) { \ 40 p[0] = (((v) >> 16) & 0xFF); \ 41 p[1] = (((v) >> 8) & 0xFF); \ 42 p[2] = ((v) & 0xFF); \ 43 } 44 #define zero_data(p) {p[0]=0;p[1]=0;p[2]=0;} 45 46 /* initiator tags; opaque for target */ 47 typedef uint32_t __bitwise__ itt_t; 48 /* below makes sense only for initiator that created this tag */ 49 #define build_itt(itt, age) ((__force itt_t)\ 50 ((itt) | ((age) << ISCSI_AGE_SHIFT))) 51 #define get_itt(itt) ((__force uint32_t)(itt_t)(itt) & ISCSI_ITT_MASK) 52 #define RESERVED_ITT ((__force itt_t)0xffffffff) 53 54 /* 55 * iSCSI Template Message Header 56 */ 57 struct iscsi_hdr { 58 uint8_t opcode; 59 uint8_t flags; /* Final bit */ 60 uint8_t rsvd2[2]; 61 uint8_t hlength; /* AHSs total length */ 62 uint8_t dlength[3]; /* Data length */ 63 struct scsi_lun lun; 64 itt_t itt; /* Initiator Task Tag, opaque for target */ 65 __be32 ttt; /* Target Task Tag */ 66 __be32 statsn; 67 __be32 exp_statsn; 68 __be32 max_statsn; 69 uint8_t other[12]; 70 }; 71 72 /************************* RFC 3720 Begin *****************************/ 73 74 #define ISCSI_RESERVED_TAG 0xffffffff 75 76 /* Opcode encoding bits */ 77 #define ISCSI_OP_RETRY 0x80 78 #define ISCSI_OP_IMMEDIATE 0x40 79 #define ISCSI_OPCODE_MASK 0x3F 80 81 /* Initiator Opcode values */ 82 #define ISCSI_OP_NOOP_OUT 0x00 83 #define ISCSI_OP_SCSI_CMD 0x01 84 #define ISCSI_OP_SCSI_TMFUNC 0x02 85 #define ISCSI_OP_LOGIN 0x03 86 #define ISCSI_OP_TEXT 0x04 87 #define ISCSI_OP_SCSI_DATA_OUT 0x05 88 #define ISCSI_OP_LOGOUT 0x06 89 #define ISCSI_OP_SNACK 0x10 90 91 #define ISCSI_OP_VENDOR1_CMD 0x1c 92 #define ISCSI_OP_VENDOR2_CMD 0x1d 93 #define ISCSI_OP_VENDOR3_CMD 0x1e 94 #define ISCSI_OP_VENDOR4_CMD 0x1f 95 96 /* Target Opcode values */ 97 #define ISCSI_OP_NOOP_IN 0x20 98 #define ISCSI_OP_SCSI_CMD_RSP 0x21 99 #define ISCSI_OP_SCSI_TMFUNC_RSP 0x22 100 #define ISCSI_OP_LOGIN_RSP 0x23 101 #define ISCSI_OP_TEXT_RSP 0x24 102 #define ISCSI_OP_SCSI_DATA_IN 0x25 103 #define ISCSI_OP_LOGOUT_RSP 0x26 104 #define ISCSI_OP_R2T 0x31 105 #define ISCSI_OP_ASYNC_EVENT 0x32 106 #define ISCSI_OP_REJECT 0x3f 107 108 struct iscsi_ahs_hdr { 109 __be16 ahslength; 110 uint8_t ahstype; 111 uint8_t ahspec[5]; 112 }; 113 114 #define ISCSI_AHSTYPE_CDB 1 115 #define ISCSI_AHSTYPE_RLENGTH 2 116 #define ISCSI_CDB_SIZE 16 117 118 /* iSCSI PDU Header */ 119 struct iscsi_cmd { 120 uint8_t opcode; 121 uint8_t flags; 122 __be16 rsvd2; 123 uint8_t hlength; 124 uint8_t dlength[3]; 125 struct scsi_lun lun; 126 itt_t itt; /* Initiator Task Tag */ 127 __be32 data_length; 128 __be32 cmdsn; 129 __be32 exp_statsn; 130 uint8_t cdb[ISCSI_CDB_SIZE]; /* SCSI Command Block */ 131 /* Additional Data (Command Dependent) */ 132 }; 133 134 /* Command PDU flags */ 135 #define ISCSI_FLAG_CMD_FINAL 0x80 136 #define ISCSI_FLAG_CMD_READ 0x40 137 #define ISCSI_FLAG_CMD_WRITE 0x20 138 #define ISCSI_FLAG_CMD_ATTR_MASK 0x07 /* 3 bits */ 139 140 /* SCSI Command Attribute values */ 141 #define ISCSI_ATTR_UNTAGGED 0 142 #define ISCSI_ATTR_SIMPLE 1 143 #define ISCSI_ATTR_ORDERED 2 144 #define ISCSI_ATTR_HEAD_OF_QUEUE 3 145 #define ISCSI_ATTR_ACA 4 146 147 struct iscsi_rlength_ahdr { 148 __be16 ahslength; 149 uint8_t ahstype; 150 uint8_t reserved; 151 __be32 read_length; 152 }; 153 154 /* Extended CDB AHS */ 155 struct iscsi_ecdb_ahdr { 156 __be16 ahslength; /* CDB length - 15, including reserved byte */ 157 uint8_t ahstype; 158 uint8_t reserved; 159 /* 4-byte aligned extended CDB spillover */ 160 uint8_t ecdb[SCSI_MAX_VARLEN_CDB_SIZE - ISCSI_CDB_SIZE]; 161 }; 162 163 /* SCSI Response Header */ 164 struct iscsi_cmd_rsp { 165 uint8_t opcode; 166 uint8_t flags; 167 uint8_t response; 168 uint8_t cmd_status; 169 uint8_t hlength; 170 uint8_t dlength[3]; 171 uint8_t rsvd[8]; 172 itt_t itt; /* Initiator Task Tag */ 173 __be32 rsvd1; 174 __be32 statsn; 175 __be32 exp_cmdsn; 176 __be32 max_cmdsn; 177 __be32 exp_datasn; 178 __be32 bi_residual_count; 179 __be32 residual_count; 180 /* Response or Sense Data (optional) */ 181 }; 182 183 /* Command Response PDU flags */ 184 #define ISCSI_FLAG_CMD_BIDI_OVERFLOW 0x10 185 #define ISCSI_FLAG_CMD_BIDI_UNDERFLOW 0x08 186 #define ISCSI_FLAG_CMD_OVERFLOW 0x04 187 #define ISCSI_FLAG_CMD_UNDERFLOW 0x02 188 189 /* iSCSI Status values. Valid if Rsp Selector bit is not set */ 190 #define ISCSI_STATUS_CMD_COMPLETED 0 191 #define ISCSI_STATUS_TARGET_FAILURE 1 192 #define ISCSI_STATUS_SUBSYS_FAILURE 2 193 194 /* Asynchronous Event Header */ 195 struct iscsi_async { 196 uint8_t opcode; 197 uint8_t flags; 198 uint8_t rsvd2[2]; 199 uint8_t rsvd3; 200 uint8_t dlength[3]; 201 struct scsi_lun lun; 202 uint8_t rsvd4[8]; 203 __be32 statsn; 204 __be32 exp_cmdsn; 205 __be32 max_cmdsn; 206 uint8_t async_event; 207 uint8_t async_vcode; 208 __be16 param1; 209 __be16 param2; 210 __be16 param3; 211 uint8_t rsvd5[4]; 212 }; 213 214 /* iSCSI Event Codes */ 215 #define ISCSI_ASYNC_MSG_SCSI_EVENT 0 216 #define ISCSI_ASYNC_MSG_REQUEST_LOGOUT 1 217 #define ISCSI_ASYNC_MSG_DROPPING_CONNECTION 2 218 #define ISCSI_ASYNC_MSG_DROPPING_ALL_CONNECTIONS 3 219 #define ISCSI_ASYNC_MSG_PARAM_NEGOTIATION 4 220 #define ISCSI_ASYNC_MSG_VENDOR_SPECIFIC 255 221 222 /* NOP-Out Message */ 223 struct iscsi_nopout { 224 uint8_t opcode; 225 uint8_t flags; 226 __be16 rsvd2; 227 uint8_t rsvd3; 228 uint8_t dlength[3]; 229 struct scsi_lun lun; 230 itt_t itt; /* Initiator Task Tag */ 231 __be32 ttt; /* Target Transfer Tag */ 232 __be32 cmdsn; 233 __be32 exp_statsn; 234 uint8_t rsvd4[16]; 235 }; 236 237 /* NOP-In Message */ 238 struct iscsi_nopin { 239 uint8_t opcode; 240 uint8_t flags; 241 __be16 rsvd2; 242 uint8_t rsvd3; 243 uint8_t dlength[3]; 244 struct scsi_lun lun; 245 itt_t itt; /* Initiator Task Tag */ 246 __be32 ttt; /* Target Transfer Tag */ 247 __be32 statsn; 248 __be32 exp_cmdsn; 249 __be32 max_cmdsn; 250 uint8_t rsvd4[12]; 251 }; 252 253 /* SCSI Task Management Message Header */ 254 struct iscsi_tm { 255 uint8_t opcode; 256 uint8_t flags; 257 uint8_t rsvd1[2]; 258 uint8_t hlength; 259 uint8_t dlength[3]; 260 struct scsi_lun lun; 261 itt_t itt; /* Initiator Task Tag */ 262 itt_t rtt; /* Reference Task Tag */ 263 __be32 cmdsn; 264 __be32 exp_statsn; 265 __be32 refcmdsn; 266 __be32 exp_datasn; 267 uint8_t rsvd2[8]; 268 }; 269 270 #define ISCSI_FLAG_TM_FUNC_MASK 0x7F 271 272 /* Function values */ 273 #define ISCSI_TM_FUNC_ABORT_TASK 1 274 #define ISCSI_TM_FUNC_ABORT_TASK_SET 2 275 #define ISCSI_TM_FUNC_CLEAR_ACA 3 276 #define ISCSI_TM_FUNC_CLEAR_TASK_SET 4 277 #define ISCSI_TM_FUNC_LOGICAL_UNIT_RESET 5 278 #define ISCSI_TM_FUNC_TARGET_WARM_RESET 6 279 #define ISCSI_TM_FUNC_TARGET_COLD_RESET 7 280 #define ISCSI_TM_FUNC_TASK_REASSIGN 8 281 282 #define ISCSI_TM_FUNC_VALUE(hdr) ((hdr)->flags & ISCSI_FLAG_TM_FUNC_MASK) 283 284 /* SCSI Task Management Response Header */ 285 struct iscsi_tm_rsp { 286 uint8_t opcode; 287 uint8_t flags; 288 uint8_t response; /* see Response values below */ 289 uint8_t qualifier; 290 uint8_t hlength; 291 uint8_t dlength[3]; 292 uint8_t rsvd2[8]; 293 itt_t itt; /* Initiator Task Tag */ 294 itt_t rtt; /* Reference Task Tag */ 295 __be32 statsn; 296 __be32 exp_cmdsn; 297 __be32 max_cmdsn; 298 uint8_t rsvd3[12]; 299 }; 300 301 /* Response values */ 302 #define ISCSI_TMF_RSP_COMPLETE 0x00 303 #define ISCSI_TMF_RSP_NO_TASK 0x01 304 #define ISCSI_TMF_RSP_NO_LUN 0x02 305 #define ISCSI_TMF_RSP_TASK_ALLEGIANT 0x03 306 #define ISCSI_TMF_RSP_NO_FAILOVER 0x04 307 #define ISCSI_TMF_RSP_NOT_SUPPORTED 0x05 308 #define ISCSI_TMF_RSP_AUTH_FAILED 0x06 309 #define ISCSI_TMF_RSP_REJECTED 0xff 310 311 /* Ready To Transfer Header */ 312 struct iscsi_r2t_rsp { 313 uint8_t opcode; 314 uint8_t flags; 315 uint8_t rsvd2[2]; 316 uint8_t hlength; 317 uint8_t dlength[3]; 318 struct scsi_lun lun; 319 itt_t itt; /* Initiator Task Tag */ 320 __be32 ttt; /* Target Transfer Tag */ 321 __be32 statsn; 322 __be32 exp_cmdsn; 323 __be32 max_cmdsn; 324 __be32 r2tsn; 325 __be32 data_offset; 326 __be32 data_length; 327 }; 328 329 /* SCSI Data Hdr */ 330 struct iscsi_data { 331 uint8_t opcode; 332 uint8_t flags; 333 uint8_t rsvd2[2]; 334 uint8_t rsvd3; 335 uint8_t dlength[3]; 336 struct scsi_lun lun; 337 itt_t itt; 338 __be32 ttt; 339 __be32 rsvd4; 340 __be32 exp_statsn; 341 __be32 rsvd5; 342 __be32 datasn; 343 __be32 offset; 344 __be32 rsvd6; 345 /* Payload */ 346 }; 347 348 /* SCSI Data Response Hdr */ 349 struct iscsi_data_rsp { 350 uint8_t opcode; 351 uint8_t flags; 352 uint8_t rsvd2; 353 uint8_t cmd_status; 354 uint8_t hlength; 355 uint8_t dlength[3]; 356 struct scsi_lun lun; 357 itt_t itt; 358 __be32 ttt; 359 __be32 statsn; 360 __be32 exp_cmdsn; 361 __be32 max_cmdsn; 362 __be32 datasn; 363 __be32 offset; 364 __be32 residual_count; 365 }; 366 367 /* Data Response PDU flags */ 368 #define ISCSI_FLAG_DATA_ACK 0x40 369 #define ISCSI_FLAG_DATA_OVERFLOW 0x04 370 #define ISCSI_FLAG_DATA_UNDERFLOW 0x02 371 #define ISCSI_FLAG_DATA_STATUS 0x01 372 373 /* Text Header */ 374 struct iscsi_text { 375 uint8_t opcode; 376 uint8_t flags; 377 uint8_t rsvd2[2]; 378 uint8_t hlength; 379 uint8_t dlength[3]; 380 uint8_t rsvd4[8]; 381 itt_t itt; 382 __be32 ttt; 383 __be32 cmdsn; 384 __be32 exp_statsn; 385 uint8_t rsvd5[16]; 386 /* Text - key=value pairs */ 387 }; 388 389 #define ISCSI_FLAG_TEXT_CONTINUE 0x40 390 391 /* Text Response Header */ 392 struct iscsi_text_rsp { 393 uint8_t opcode; 394 uint8_t flags; 395 uint8_t rsvd2[2]; 396 uint8_t hlength; 397 uint8_t dlength[3]; 398 uint8_t rsvd4[8]; 399 itt_t itt; 400 __be32 ttt; 401 __be32 statsn; 402 __be32 exp_cmdsn; 403 __be32 max_cmdsn; 404 uint8_t rsvd5[12]; 405 /* Text Response - key:value pairs */ 406 }; 407 408 /* Login Header */ 409 struct iscsi_login { 410 uint8_t opcode; 411 uint8_t flags; 412 uint8_t max_version; /* Max. version supported */ 413 uint8_t min_version; /* Min. version supported */ 414 uint8_t hlength; 415 uint8_t dlength[3]; 416 uint8_t isid[6]; /* Initiator Session ID */ 417 __be16 tsih; /* Target Session Handle */ 418 itt_t itt; /* Initiator Task Tag */ 419 __be16 cid; 420 __be16 rsvd3; 421 __be32 cmdsn; 422 __be32 exp_statsn; 423 uint8_t rsvd5[16]; 424 }; 425 426 /* Login PDU flags */ 427 #define ISCSI_FLAG_LOGIN_TRANSIT 0x80 428 #define ISCSI_FLAG_LOGIN_CONTINUE 0x40 429 #define ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK 0x0C /* 2 bits */ 430 #define ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK 0x03 /* 2 bits */ 431 432 #define ISCSI_LOGIN_CURRENT_STAGE(flags) \ 433 ((flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) >> 2) 434 #define ISCSI_LOGIN_NEXT_STAGE(flags) \ 435 (flags & ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK) 436 437 /* Login Response Header */ 438 struct iscsi_login_rsp { 439 uint8_t opcode; 440 uint8_t flags; 441 uint8_t max_version; /* Max. version supported */ 442 uint8_t active_version; /* Active version */ 443 uint8_t hlength; 444 uint8_t dlength[3]; 445 uint8_t isid[6]; /* Initiator Session ID */ 446 __be16 tsih; /* Target Session Handle */ 447 itt_t itt; /* Initiator Task Tag */ 448 __be32 rsvd3; 449 __be32 statsn; 450 __be32 exp_cmdsn; 451 __be32 max_cmdsn; 452 uint8_t status_class; /* see Login RSP ststus classes below */ 453 uint8_t status_detail; /* see Login RSP Status details below */ 454 uint8_t rsvd4[10]; 455 }; 456 457 /* Login stage (phase) codes for CSG, NSG */ 458 #define ISCSI_INITIAL_LOGIN_STAGE -1 459 #define ISCSI_SECURITY_NEGOTIATION_STAGE 0 460 #define ISCSI_OP_PARMS_NEGOTIATION_STAGE 1 461 #define ISCSI_FULL_FEATURE_PHASE 3 462 463 /* Login Status response classes */ 464 #define ISCSI_STATUS_CLS_SUCCESS 0x00 465 #define ISCSI_STATUS_CLS_REDIRECT 0x01 466 #define ISCSI_STATUS_CLS_INITIATOR_ERR 0x02 467 #define ISCSI_STATUS_CLS_TARGET_ERR 0x03 468 469 /* Login Status response detail codes */ 470 /* Class-0 (Success) */ 471 #define ISCSI_LOGIN_STATUS_ACCEPT 0x00 472 473 /* Class-1 (Redirection) */ 474 #define ISCSI_LOGIN_STATUS_TGT_MOVED_TEMP 0x01 475 #define ISCSI_LOGIN_STATUS_TGT_MOVED_PERM 0x02 476 477 /* Class-2 (Initiator Error) */ 478 #define ISCSI_LOGIN_STATUS_INIT_ERR 0x00 479 #define ISCSI_LOGIN_STATUS_AUTH_FAILED 0x01 480 #define ISCSI_LOGIN_STATUS_TGT_FORBIDDEN 0x02 481 #define ISCSI_LOGIN_STATUS_TGT_NOT_FOUND 0x03 482 #define ISCSI_LOGIN_STATUS_TGT_REMOVED 0x04 483 #define ISCSI_LOGIN_STATUS_NO_VERSION 0x05 484 #define ISCSI_LOGIN_STATUS_ISID_ERROR 0x06 485 #define ISCSI_LOGIN_STATUS_MISSING_FIELDS 0x07 486 #define ISCSI_LOGIN_STATUS_CONN_ADD_FAILED 0x08 487 #define ISCSI_LOGIN_STATUS_NO_SESSION_TYPE 0x09 488 #define ISCSI_LOGIN_STATUS_NO_SESSION 0x0a 489 #define ISCSI_LOGIN_STATUS_INVALID_REQUEST 0x0b 490 491 /* Class-3 (Target Error) */ 492 #define ISCSI_LOGIN_STATUS_TARGET_ERROR 0x00 493 #define ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE 0x01 494 #define ISCSI_LOGIN_STATUS_NO_RESOURCES 0x02 495 496 /* Logout Header */ 497 struct iscsi_logout { 498 uint8_t opcode; 499 uint8_t flags; 500 uint8_t rsvd1[2]; 501 uint8_t hlength; 502 uint8_t dlength[3]; 503 uint8_t rsvd2[8]; 504 itt_t itt; /* Initiator Task Tag */ 505 __be16 cid; 506 uint8_t rsvd3[2]; 507 __be32 cmdsn; 508 __be32 exp_statsn; 509 uint8_t rsvd4[16]; 510 }; 511 512 /* Logout PDU flags */ 513 #define ISCSI_FLAG_LOGOUT_REASON_MASK 0x7F 514 515 /* logout reason_code values */ 516 517 #define ISCSI_LOGOUT_REASON_CLOSE_SESSION 0 518 #define ISCSI_LOGOUT_REASON_CLOSE_CONNECTION 1 519 #define ISCSI_LOGOUT_REASON_RECOVERY 2 520 #define ISCSI_LOGOUT_REASON_AEN_REQUEST 3 521 522 /* Logout Response Header */ 523 struct iscsi_logout_rsp { 524 uint8_t opcode; 525 uint8_t flags; 526 uint8_t response; /* see Logout response values below */ 527 uint8_t rsvd2; 528 uint8_t hlength; 529 uint8_t dlength[3]; 530 uint8_t rsvd3[8]; 531 itt_t itt; /* Initiator Task Tag */ 532 __be32 rsvd4; 533 __be32 statsn; 534 __be32 exp_cmdsn; 535 __be32 max_cmdsn; 536 __be32 rsvd5; 537 __be16 t2wait; 538 __be16 t2retain; 539 __be32 rsvd6; 540 }; 541 542 /* logout response status values */ 543 544 #define ISCSI_LOGOUT_SUCCESS 0 545 #define ISCSI_LOGOUT_CID_NOT_FOUND 1 546 #define ISCSI_LOGOUT_RECOVERY_UNSUPPORTED 2 547 #define ISCSI_LOGOUT_CLEANUP_FAILED 3 548 549 /* SNACK Header */ 550 struct iscsi_snack { 551 uint8_t opcode; 552 uint8_t flags; 553 uint8_t rsvd2[14]; 554 itt_t itt; 555 __be32 begrun; 556 __be32 runlength; 557 __be32 exp_statsn; 558 __be32 rsvd3; 559 __be32 exp_datasn; 560 uint8_t rsvd6[8]; 561 }; 562 563 /* SNACK PDU flags */ 564 #define ISCSI_FLAG_SNACK_TYPE_MASK 0x0F /* 4 bits */ 565 566 /* Reject Message Header */ 567 struct iscsi_reject { 568 uint8_t opcode; 569 uint8_t flags; 570 uint8_t reason; 571 uint8_t rsvd2; 572 uint8_t hlength; 573 uint8_t dlength[3]; 574 uint8_t rsvd3[8]; 575 __be32 ffffffff; 576 uint8_t rsvd4[4]; 577 __be32 statsn; 578 __be32 exp_cmdsn; 579 __be32 max_cmdsn; 580 __be32 datasn; 581 uint8_t rsvd5[8]; 582 /* Text - Rejected hdr */ 583 }; 584 585 /* Reason for Reject */ 586 #define ISCSI_REASON_CMD_BEFORE_LOGIN 1 587 #define ISCSI_REASON_DATA_DIGEST_ERROR 2 588 #define ISCSI_REASON_DATA_SNACK_REJECT 3 589 #define ISCSI_REASON_PROTOCOL_ERROR 4 590 #define ISCSI_REASON_CMD_NOT_SUPPORTED 5 591 #define ISCSI_REASON_IMM_CMD_REJECT 6 592 #define ISCSI_REASON_TASK_IN_PROGRESS 7 593 #define ISCSI_REASON_INVALID_SNACK 8 594 #define ISCSI_REASON_BOOKMARK_INVALID 9 595 #define ISCSI_REASON_BOOKMARK_NO_RESOURCES 10 596 #define ISCSI_REASON_NEGOTIATION_RESET 11 597 598 /* Max. number of Key=Value pairs in a text message */ 599 #define MAX_KEY_VALUE_PAIRS 8192 600 601 /* maximum length for text keys/values */ 602 #define KEY_MAXLEN 64 603 #define VALUE_MAXLEN 255 604 #define TARGET_NAME_MAXLEN VALUE_MAXLEN 605 606 #define ISCSI_DEF_MAX_RECV_SEG_LEN 8192 607 #define ISCSI_MIN_MAX_RECV_SEG_LEN 512 608 #define ISCSI_MAX_MAX_RECV_SEG_LEN 16777215 609 610 #define ISCSI_DEF_FIRST_BURST_LEN 65536 611 #define ISCSI_MIN_FIRST_BURST_LEN 512 612 #define ISCSI_MAX_FIRST_BURST_LEN 16777215 613 614 #define ISCSI_DEF_MAX_BURST_LEN 262144 615 #define ISCSI_MIN_MAX_BURST_LEN 512 616 #define ISCSI_MAX_MAX_BURST_LEN 16777215 617 618 #define ISCSI_DEF_TIME2WAIT 2 619 620 /************************* RFC 3720 End *****************************/ 621 622 #endif /* ISCSI_PROTO_H */ 623