1 /******************************************************************************* 2 * This file contains main functions related to iSCSI Parameter negotiation. 3 * 4 * (c) Copyright 2007-2013 Datera, Inc. 5 * 6 * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> 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 by 10 * 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, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 ******************************************************************************/ 18 19 #include <linux/slab.h> 20 21 #include <target/iscsi/iscsi_target_core.h> 22 #include "iscsi_target_util.h" 23 #include "iscsi_target_parameters.h" 24 25 int iscsi_login_rx_data( 26 struct iscsi_conn *conn, 27 char *buf, 28 int length) 29 { 30 int rx_got; 31 struct kvec iov; 32 33 memset(&iov, 0, sizeof(struct kvec)); 34 iov.iov_len = length; 35 iov.iov_base = buf; 36 37 rx_got = rx_data(conn, &iov, 1, length); 38 if (rx_got != length) { 39 pr_err("rx_data returned %d, expecting %d.\n", 40 rx_got, length); 41 return -1; 42 } 43 44 return 0 ; 45 } 46 47 int iscsi_login_tx_data( 48 struct iscsi_conn *conn, 49 char *pdu_buf, 50 char *text_buf, 51 int text_length) 52 { 53 int length, tx_sent, iov_cnt = 1; 54 struct kvec iov[2]; 55 56 length = (ISCSI_HDR_LEN + text_length); 57 58 memset(&iov[0], 0, 2 * sizeof(struct kvec)); 59 iov[0].iov_len = ISCSI_HDR_LEN; 60 iov[0].iov_base = pdu_buf; 61 62 if (text_buf && text_length) { 63 iov[1].iov_len = text_length; 64 iov[1].iov_base = text_buf; 65 iov_cnt++; 66 } 67 68 tx_sent = tx_data(conn, &iov[0], iov_cnt, length); 69 if (tx_sent != length) { 70 pr_err("tx_data returned %d, expecting %d.\n", 71 tx_sent, length); 72 return -1; 73 } 74 75 return 0; 76 } 77 78 void iscsi_dump_conn_ops(struct iscsi_conn_ops *conn_ops) 79 { 80 pr_debug("HeaderDigest: %s\n", (conn_ops->HeaderDigest) ? 81 "CRC32C" : "None"); 82 pr_debug("DataDigest: %s\n", (conn_ops->DataDigest) ? 83 "CRC32C" : "None"); 84 pr_debug("MaxRecvDataSegmentLength: %u\n", 85 conn_ops->MaxRecvDataSegmentLength); 86 } 87 88 void iscsi_dump_sess_ops(struct iscsi_sess_ops *sess_ops) 89 { 90 pr_debug("InitiatorName: %s\n", sess_ops->InitiatorName); 91 pr_debug("InitiatorAlias: %s\n", sess_ops->InitiatorAlias); 92 pr_debug("TargetName: %s\n", sess_ops->TargetName); 93 pr_debug("TargetAlias: %s\n", sess_ops->TargetAlias); 94 pr_debug("TargetPortalGroupTag: %hu\n", 95 sess_ops->TargetPortalGroupTag); 96 pr_debug("MaxConnections: %hu\n", sess_ops->MaxConnections); 97 pr_debug("InitialR2T: %s\n", 98 (sess_ops->InitialR2T) ? "Yes" : "No"); 99 pr_debug("ImmediateData: %s\n", (sess_ops->ImmediateData) ? 100 "Yes" : "No"); 101 pr_debug("MaxBurstLength: %u\n", sess_ops->MaxBurstLength); 102 pr_debug("FirstBurstLength: %u\n", sess_ops->FirstBurstLength); 103 pr_debug("DefaultTime2Wait: %hu\n", sess_ops->DefaultTime2Wait); 104 pr_debug("DefaultTime2Retain: %hu\n", 105 sess_ops->DefaultTime2Retain); 106 pr_debug("MaxOutstandingR2T: %hu\n", 107 sess_ops->MaxOutstandingR2T); 108 pr_debug("DataPDUInOrder: %s\n", 109 (sess_ops->DataPDUInOrder) ? "Yes" : "No"); 110 pr_debug("DataSequenceInOrder: %s\n", 111 (sess_ops->DataSequenceInOrder) ? "Yes" : "No"); 112 pr_debug("ErrorRecoveryLevel: %hu\n", 113 sess_ops->ErrorRecoveryLevel); 114 pr_debug("SessionType: %s\n", (sess_ops->SessionType) ? 115 "Discovery" : "Normal"); 116 } 117 118 void iscsi_print_params(struct iscsi_param_list *param_list) 119 { 120 struct iscsi_param *param; 121 122 list_for_each_entry(param, ¶m_list->param_list, p_list) 123 pr_debug("%s: %s\n", param->name, param->value); 124 } 125 126 static struct iscsi_param *iscsi_set_default_param(struct iscsi_param_list *param_list, 127 char *name, char *value, u8 phase, u8 scope, u8 sender, 128 u16 type_range, u8 use) 129 { 130 struct iscsi_param *param = NULL; 131 132 param = kzalloc(sizeof(struct iscsi_param), GFP_KERNEL); 133 if (!param) { 134 pr_err("Unable to allocate memory for parameter.\n"); 135 goto out; 136 } 137 INIT_LIST_HEAD(¶m->p_list); 138 139 param->name = kstrdup(name, GFP_KERNEL); 140 if (!param->name) { 141 pr_err("Unable to allocate memory for parameter name.\n"); 142 goto out; 143 } 144 145 param->value = kstrdup(value, GFP_KERNEL); 146 if (!param->value) { 147 pr_err("Unable to allocate memory for parameter value.\n"); 148 goto out; 149 } 150 151 param->phase = phase; 152 param->scope = scope; 153 param->sender = sender; 154 param->use = use; 155 param->type_range = type_range; 156 157 switch (param->type_range) { 158 case TYPERANGE_BOOL_AND: 159 param->type = TYPE_BOOL_AND; 160 break; 161 case TYPERANGE_BOOL_OR: 162 param->type = TYPE_BOOL_OR; 163 break; 164 case TYPERANGE_0_TO_2: 165 case TYPERANGE_0_TO_3600: 166 case TYPERANGE_0_TO_32767: 167 case TYPERANGE_0_TO_65535: 168 case TYPERANGE_1_TO_65535: 169 case TYPERANGE_2_TO_3600: 170 case TYPERANGE_512_TO_16777215: 171 param->type = TYPE_NUMBER; 172 break; 173 case TYPERANGE_AUTH: 174 case TYPERANGE_DIGEST: 175 param->type = TYPE_VALUE_LIST | TYPE_STRING; 176 break; 177 case TYPERANGE_ISCSINAME: 178 case TYPERANGE_SESSIONTYPE: 179 case TYPERANGE_TARGETADDRESS: 180 case TYPERANGE_UTF8: 181 param->type = TYPE_STRING; 182 break; 183 default: 184 pr_err("Unknown type_range 0x%02x\n", 185 param->type_range); 186 goto out; 187 } 188 list_add_tail(¶m->p_list, ¶m_list->param_list); 189 190 return param; 191 out: 192 if (param) { 193 kfree(param->value); 194 kfree(param->name); 195 kfree(param); 196 } 197 198 return NULL; 199 } 200 201 /* #warning Add extension keys */ 202 int iscsi_create_default_params(struct iscsi_param_list **param_list_ptr) 203 { 204 struct iscsi_param *param = NULL; 205 struct iscsi_param_list *pl; 206 207 pl = kzalloc(sizeof(struct iscsi_param_list), GFP_KERNEL); 208 if (!pl) { 209 pr_err("Unable to allocate memory for" 210 " struct iscsi_param_list.\n"); 211 return -1 ; 212 } 213 INIT_LIST_HEAD(&pl->param_list); 214 INIT_LIST_HEAD(&pl->extra_response_list); 215 216 /* 217 * The format for setting the initial parameter definitions are: 218 * 219 * Parameter name: 220 * Initial value: 221 * Allowable phase: 222 * Scope: 223 * Allowable senders: 224 * Typerange: 225 * Use: 226 */ 227 param = iscsi_set_default_param(pl, AUTHMETHOD, INITIAL_AUTHMETHOD, 228 PHASE_SECURITY, SCOPE_CONNECTION_ONLY, SENDER_BOTH, 229 TYPERANGE_AUTH, USE_INITIAL_ONLY); 230 if (!param) 231 goto out; 232 233 param = iscsi_set_default_param(pl, HEADERDIGEST, INITIAL_HEADERDIGEST, 234 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH, 235 TYPERANGE_DIGEST, USE_INITIAL_ONLY); 236 if (!param) 237 goto out; 238 239 param = iscsi_set_default_param(pl, DATADIGEST, INITIAL_DATADIGEST, 240 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH, 241 TYPERANGE_DIGEST, USE_INITIAL_ONLY); 242 if (!param) 243 goto out; 244 245 param = iscsi_set_default_param(pl, MAXCONNECTIONS, 246 INITIAL_MAXCONNECTIONS, PHASE_OPERATIONAL, 247 SCOPE_SESSION_WIDE, SENDER_BOTH, 248 TYPERANGE_1_TO_65535, USE_LEADING_ONLY); 249 if (!param) 250 goto out; 251 252 param = iscsi_set_default_param(pl, SENDTARGETS, INITIAL_SENDTARGETS, 253 PHASE_FFP0, SCOPE_SESSION_WIDE, SENDER_INITIATOR, 254 TYPERANGE_UTF8, 0); 255 if (!param) 256 goto out; 257 258 param = iscsi_set_default_param(pl, TARGETNAME, INITIAL_TARGETNAME, 259 PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_BOTH, 260 TYPERANGE_ISCSINAME, USE_ALL); 261 if (!param) 262 goto out; 263 264 param = iscsi_set_default_param(pl, INITIATORNAME, 265 INITIAL_INITIATORNAME, PHASE_DECLARATIVE, 266 SCOPE_SESSION_WIDE, SENDER_INITIATOR, 267 TYPERANGE_ISCSINAME, USE_INITIAL_ONLY); 268 if (!param) 269 goto out; 270 271 param = iscsi_set_default_param(pl, TARGETALIAS, INITIAL_TARGETALIAS, 272 PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_TARGET, 273 TYPERANGE_UTF8, USE_ALL); 274 if (!param) 275 goto out; 276 277 param = iscsi_set_default_param(pl, INITIATORALIAS, 278 INITIAL_INITIATORALIAS, PHASE_DECLARATIVE, 279 SCOPE_SESSION_WIDE, SENDER_INITIATOR, TYPERANGE_UTF8, 280 USE_ALL); 281 if (!param) 282 goto out; 283 284 param = iscsi_set_default_param(pl, TARGETADDRESS, 285 INITIAL_TARGETADDRESS, PHASE_DECLARATIVE, 286 SCOPE_SESSION_WIDE, SENDER_TARGET, 287 TYPERANGE_TARGETADDRESS, USE_ALL); 288 if (!param) 289 goto out; 290 291 param = iscsi_set_default_param(pl, TARGETPORTALGROUPTAG, 292 INITIAL_TARGETPORTALGROUPTAG, 293 PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_TARGET, 294 TYPERANGE_0_TO_65535, USE_INITIAL_ONLY); 295 if (!param) 296 goto out; 297 298 param = iscsi_set_default_param(pl, INITIALR2T, INITIAL_INITIALR2T, 299 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH, 300 TYPERANGE_BOOL_OR, USE_LEADING_ONLY); 301 if (!param) 302 goto out; 303 304 param = iscsi_set_default_param(pl, IMMEDIATEDATA, 305 INITIAL_IMMEDIATEDATA, PHASE_OPERATIONAL, 306 SCOPE_SESSION_WIDE, SENDER_BOTH, TYPERANGE_BOOL_AND, 307 USE_LEADING_ONLY); 308 if (!param) 309 goto out; 310 311 param = iscsi_set_default_param(pl, MAXXMITDATASEGMENTLENGTH, 312 INITIAL_MAXXMITDATASEGMENTLENGTH, 313 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH, 314 TYPERANGE_512_TO_16777215, USE_ALL); 315 if (!param) 316 goto out; 317 318 param = iscsi_set_default_param(pl, MAXRECVDATASEGMENTLENGTH, 319 INITIAL_MAXRECVDATASEGMENTLENGTH, 320 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH, 321 TYPERANGE_512_TO_16777215, USE_ALL); 322 if (!param) 323 goto out; 324 325 param = iscsi_set_default_param(pl, MAXBURSTLENGTH, 326 INITIAL_MAXBURSTLENGTH, PHASE_OPERATIONAL, 327 SCOPE_SESSION_WIDE, SENDER_BOTH, 328 TYPERANGE_512_TO_16777215, USE_LEADING_ONLY); 329 if (!param) 330 goto out; 331 332 param = iscsi_set_default_param(pl, FIRSTBURSTLENGTH, 333 INITIAL_FIRSTBURSTLENGTH, 334 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH, 335 TYPERANGE_512_TO_16777215, USE_LEADING_ONLY); 336 if (!param) 337 goto out; 338 339 param = iscsi_set_default_param(pl, DEFAULTTIME2WAIT, 340 INITIAL_DEFAULTTIME2WAIT, 341 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH, 342 TYPERANGE_0_TO_3600, USE_LEADING_ONLY); 343 if (!param) 344 goto out; 345 346 param = iscsi_set_default_param(pl, DEFAULTTIME2RETAIN, 347 INITIAL_DEFAULTTIME2RETAIN, 348 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH, 349 TYPERANGE_0_TO_3600, USE_LEADING_ONLY); 350 if (!param) 351 goto out; 352 353 param = iscsi_set_default_param(pl, MAXOUTSTANDINGR2T, 354 INITIAL_MAXOUTSTANDINGR2T, 355 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH, 356 TYPERANGE_1_TO_65535, USE_LEADING_ONLY); 357 if (!param) 358 goto out; 359 360 param = iscsi_set_default_param(pl, DATAPDUINORDER, 361 INITIAL_DATAPDUINORDER, PHASE_OPERATIONAL, 362 SCOPE_SESSION_WIDE, SENDER_BOTH, TYPERANGE_BOOL_OR, 363 USE_LEADING_ONLY); 364 if (!param) 365 goto out; 366 367 param = iscsi_set_default_param(pl, DATASEQUENCEINORDER, 368 INITIAL_DATASEQUENCEINORDER, 369 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH, 370 TYPERANGE_BOOL_OR, USE_LEADING_ONLY); 371 if (!param) 372 goto out; 373 374 param = iscsi_set_default_param(pl, ERRORRECOVERYLEVEL, 375 INITIAL_ERRORRECOVERYLEVEL, 376 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH, 377 TYPERANGE_0_TO_2, USE_LEADING_ONLY); 378 if (!param) 379 goto out; 380 381 param = iscsi_set_default_param(pl, SESSIONTYPE, INITIAL_SESSIONTYPE, 382 PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_INITIATOR, 383 TYPERANGE_SESSIONTYPE, USE_LEADING_ONLY); 384 if (!param) 385 goto out; 386 387 param = iscsi_set_default_param(pl, IFMARKER, INITIAL_IFMARKER, 388 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH, 389 TYPERANGE_BOOL_AND, USE_INITIAL_ONLY); 390 if (!param) 391 goto out; 392 393 param = iscsi_set_default_param(pl, OFMARKER, INITIAL_OFMARKER, 394 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH, 395 TYPERANGE_BOOL_AND, USE_INITIAL_ONLY); 396 if (!param) 397 goto out; 398 399 param = iscsi_set_default_param(pl, IFMARKINT, INITIAL_IFMARKINT, 400 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH, 401 TYPERANGE_UTF8, USE_INITIAL_ONLY); 402 if (!param) 403 goto out; 404 405 param = iscsi_set_default_param(pl, OFMARKINT, INITIAL_OFMARKINT, 406 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH, 407 TYPERANGE_UTF8, USE_INITIAL_ONLY); 408 if (!param) 409 goto out; 410 411 /* 412 * Extra parameters for ISER from RFC-5046 413 */ 414 param = iscsi_set_default_param(pl, RDMAEXTENSIONS, INITIAL_RDMAEXTENSIONS, 415 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH, 416 TYPERANGE_BOOL_AND, USE_LEADING_ONLY); 417 if (!param) 418 goto out; 419 420 param = iscsi_set_default_param(pl, INITIATORRECVDATASEGMENTLENGTH, 421 INITIAL_INITIATORRECVDATASEGMENTLENGTH, 422 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH, 423 TYPERANGE_512_TO_16777215, USE_ALL); 424 if (!param) 425 goto out; 426 427 param = iscsi_set_default_param(pl, TARGETRECVDATASEGMENTLENGTH, 428 INITIAL_TARGETRECVDATASEGMENTLENGTH, 429 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH, 430 TYPERANGE_512_TO_16777215, USE_ALL); 431 if (!param) 432 goto out; 433 434 *param_list_ptr = pl; 435 return 0; 436 out: 437 iscsi_release_param_list(pl); 438 return -1; 439 } 440 441 int iscsi_set_keys_to_negotiate( 442 struct iscsi_param_list *param_list, 443 bool iser) 444 { 445 struct iscsi_param *param; 446 447 param_list->iser = iser; 448 449 list_for_each_entry(param, ¶m_list->param_list, p_list) { 450 param->state = 0; 451 if (!strcmp(param->name, AUTHMETHOD)) { 452 SET_PSTATE_NEGOTIATE(param); 453 } else if (!strcmp(param->name, HEADERDIGEST)) { 454 if (!iser) 455 SET_PSTATE_NEGOTIATE(param); 456 } else if (!strcmp(param->name, DATADIGEST)) { 457 if (!iser) 458 SET_PSTATE_NEGOTIATE(param); 459 } else if (!strcmp(param->name, MAXCONNECTIONS)) { 460 SET_PSTATE_NEGOTIATE(param); 461 } else if (!strcmp(param->name, TARGETNAME)) { 462 continue; 463 } else if (!strcmp(param->name, INITIATORNAME)) { 464 continue; 465 } else if (!strcmp(param->name, TARGETALIAS)) { 466 if (param->value) 467 SET_PSTATE_NEGOTIATE(param); 468 } else if (!strcmp(param->name, INITIATORALIAS)) { 469 continue; 470 } else if (!strcmp(param->name, TARGETPORTALGROUPTAG)) { 471 SET_PSTATE_NEGOTIATE(param); 472 } else if (!strcmp(param->name, INITIALR2T)) { 473 SET_PSTATE_NEGOTIATE(param); 474 } else if (!strcmp(param->name, IMMEDIATEDATA)) { 475 SET_PSTATE_NEGOTIATE(param); 476 } else if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) { 477 if (!iser) 478 SET_PSTATE_NEGOTIATE(param); 479 } else if (!strcmp(param->name, MAXXMITDATASEGMENTLENGTH)) { 480 continue; 481 } else if (!strcmp(param->name, MAXBURSTLENGTH)) { 482 SET_PSTATE_NEGOTIATE(param); 483 } else if (!strcmp(param->name, FIRSTBURSTLENGTH)) { 484 SET_PSTATE_NEGOTIATE(param); 485 } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) { 486 SET_PSTATE_NEGOTIATE(param); 487 } else if (!strcmp(param->name, DEFAULTTIME2RETAIN)) { 488 SET_PSTATE_NEGOTIATE(param); 489 } else if (!strcmp(param->name, MAXOUTSTANDINGR2T)) { 490 SET_PSTATE_NEGOTIATE(param); 491 } else if (!strcmp(param->name, DATAPDUINORDER)) { 492 SET_PSTATE_NEGOTIATE(param); 493 } else if (!strcmp(param->name, DATASEQUENCEINORDER)) { 494 SET_PSTATE_NEGOTIATE(param); 495 } else if (!strcmp(param->name, ERRORRECOVERYLEVEL)) { 496 SET_PSTATE_NEGOTIATE(param); 497 } else if (!strcmp(param->name, SESSIONTYPE)) { 498 SET_PSTATE_NEGOTIATE(param); 499 } else if (!strcmp(param->name, IFMARKER)) { 500 SET_PSTATE_REJECT(param); 501 } else if (!strcmp(param->name, OFMARKER)) { 502 SET_PSTATE_REJECT(param); 503 } else if (!strcmp(param->name, IFMARKINT)) { 504 SET_PSTATE_REJECT(param); 505 } else if (!strcmp(param->name, OFMARKINT)) { 506 SET_PSTATE_REJECT(param); 507 } else if (!strcmp(param->name, RDMAEXTENSIONS)) { 508 if (iser) 509 SET_PSTATE_NEGOTIATE(param); 510 } else if (!strcmp(param->name, INITIATORRECVDATASEGMENTLENGTH)) { 511 if (iser) 512 SET_PSTATE_NEGOTIATE(param); 513 } else if (!strcmp(param->name, TARGETRECVDATASEGMENTLENGTH)) { 514 if (iser) 515 SET_PSTATE_NEGOTIATE(param); 516 } 517 } 518 519 return 0; 520 } 521 522 int iscsi_set_keys_irrelevant_for_discovery( 523 struct iscsi_param_list *param_list) 524 { 525 struct iscsi_param *param; 526 527 list_for_each_entry(param, ¶m_list->param_list, p_list) { 528 if (!strcmp(param->name, MAXCONNECTIONS)) 529 param->state &= ~PSTATE_NEGOTIATE; 530 else if (!strcmp(param->name, INITIALR2T)) 531 param->state &= ~PSTATE_NEGOTIATE; 532 else if (!strcmp(param->name, IMMEDIATEDATA)) 533 param->state &= ~PSTATE_NEGOTIATE; 534 else if (!strcmp(param->name, MAXBURSTLENGTH)) 535 param->state &= ~PSTATE_NEGOTIATE; 536 else if (!strcmp(param->name, FIRSTBURSTLENGTH)) 537 param->state &= ~PSTATE_NEGOTIATE; 538 else if (!strcmp(param->name, MAXOUTSTANDINGR2T)) 539 param->state &= ~PSTATE_NEGOTIATE; 540 else if (!strcmp(param->name, DATAPDUINORDER)) 541 param->state &= ~PSTATE_NEGOTIATE; 542 else if (!strcmp(param->name, DATASEQUENCEINORDER)) 543 param->state &= ~PSTATE_NEGOTIATE; 544 else if (!strcmp(param->name, ERRORRECOVERYLEVEL)) 545 param->state &= ~PSTATE_NEGOTIATE; 546 else if (!strcmp(param->name, DEFAULTTIME2WAIT)) 547 param->state &= ~PSTATE_NEGOTIATE; 548 else if (!strcmp(param->name, DEFAULTTIME2RETAIN)) 549 param->state &= ~PSTATE_NEGOTIATE; 550 else if (!strcmp(param->name, IFMARKER)) 551 param->state &= ~PSTATE_NEGOTIATE; 552 else if (!strcmp(param->name, OFMARKER)) 553 param->state &= ~PSTATE_NEGOTIATE; 554 else if (!strcmp(param->name, IFMARKINT)) 555 param->state &= ~PSTATE_NEGOTIATE; 556 else if (!strcmp(param->name, OFMARKINT)) 557 param->state &= ~PSTATE_NEGOTIATE; 558 else if (!strcmp(param->name, RDMAEXTENSIONS)) 559 param->state &= ~PSTATE_NEGOTIATE; 560 else if (!strcmp(param->name, INITIATORRECVDATASEGMENTLENGTH)) 561 param->state &= ~PSTATE_NEGOTIATE; 562 else if (!strcmp(param->name, TARGETRECVDATASEGMENTLENGTH)) 563 param->state &= ~PSTATE_NEGOTIATE; 564 } 565 566 return 0; 567 } 568 569 int iscsi_copy_param_list( 570 struct iscsi_param_list **dst_param_list, 571 struct iscsi_param_list *src_param_list, 572 int leading) 573 { 574 struct iscsi_param *param = NULL; 575 struct iscsi_param *new_param = NULL; 576 struct iscsi_param_list *param_list = NULL; 577 578 param_list = kzalloc(sizeof(struct iscsi_param_list), GFP_KERNEL); 579 if (!param_list) { 580 pr_err("Unable to allocate memory for struct iscsi_param_list.\n"); 581 return -1; 582 } 583 INIT_LIST_HEAD(¶m_list->param_list); 584 INIT_LIST_HEAD(¶m_list->extra_response_list); 585 586 list_for_each_entry(param, &src_param_list->param_list, p_list) { 587 if (!leading && (param->scope & SCOPE_SESSION_WIDE)) { 588 if ((strcmp(param->name, "TargetName") != 0) && 589 (strcmp(param->name, "InitiatorName") != 0) && 590 (strcmp(param->name, "TargetPortalGroupTag") != 0)) 591 continue; 592 } 593 594 new_param = kzalloc(sizeof(struct iscsi_param), GFP_KERNEL); 595 if (!new_param) { 596 pr_err("Unable to allocate memory for struct iscsi_param.\n"); 597 goto err_out; 598 } 599 600 new_param->name = kstrdup(param->name, GFP_KERNEL); 601 new_param->value = kstrdup(param->value, GFP_KERNEL); 602 if (!new_param->value || !new_param->name) { 603 kfree(new_param->value); 604 kfree(new_param->name); 605 kfree(new_param); 606 pr_err("Unable to allocate memory for parameter name/value.\n"); 607 goto err_out; 608 } 609 610 new_param->set_param = param->set_param; 611 new_param->phase = param->phase; 612 new_param->scope = param->scope; 613 new_param->sender = param->sender; 614 new_param->type = param->type; 615 new_param->use = param->use; 616 new_param->type_range = param->type_range; 617 618 list_add_tail(&new_param->p_list, ¶m_list->param_list); 619 } 620 621 if (!list_empty(¶m_list->param_list)) { 622 *dst_param_list = param_list; 623 } else { 624 pr_err("No parameters allocated.\n"); 625 goto err_out; 626 } 627 628 return 0; 629 630 err_out: 631 iscsi_release_param_list(param_list); 632 return -1; 633 } 634 635 static void iscsi_release_extra_responses(struct iscsi_param_list *param_list) 636 { 637 struct iscsi_extra_response *er, *er_tmp; 638 639 list_for_each_entry_safe(er, er_tmp, ¶m_list->extra_response_list, 640 er_list) { 641 list_del(&er->er_list); 642 kfree(er); 643 } 644 } 645 646 void iscsi_release_param_list(struct iscsi_param_list *param_list) 647 { 648 struct iscsi_param *param, *param_tmp; 649 650 list_for_each_entry_safe(param, param_tmp, ¶m_list->param_list, 651 p_list) { 652 list_del(¶m->p_list); 653 654 kfree(param->name); 655 kfree(param->value); 656 kfree(param); 657 } 658 659 iscsi_release_extra_responses(param_list); 660 661 kfree(param_list); 662 } 663 664 struct iscsi_param *iscsi_find_param_from_key( 665 char *key, 666 struct iscsi_param_list *param_list) 667 { 668 struct iscsi_param *param; 669 670 if (!key || !param_list) { 671 pr_err("Key or parameter list pointer is NULL.\n"); 672 return NULL; 673 } 674 675 list_for_each_entry(param, ¶m_list->param_list, p_list) { 676 if (!strcmp(key, param->name)) 677 return param; 678 } 679 680 pr_err("Unable to locate key \"%s\".\n", key); 681 return NULL; 682 } 683 684 int iscsi_extract_key_value(char *textbuf, char **key, char **value) 685 { 686 *value = strchr(textbuf, '='); 687 if (!*value) { 688 pr_err("Unable to locate \"=\" separator for key," 689 " ignoring request.\n"); 690 return -1; 691 } 692 693 *key = textbuf; 694 **value = '\0'; 695 *value = *value + 1; 696 697 return 0; 698 } 699 700 int iscsi_update_param_value(struct iscsi_param *param, char *value) 701 { 702 kfree(param->value); 703 704 param->value = kstrdup(value, GFP_KERNEL); 705 if (!param->value) { 706 pr_err("Unable to allocate memory for value.\n"); 707 return -ENOMEM; 708 } 709 710 pr_debug("iSCSI Parameter updated to %s=%s\n", 711 param->name, param->value); 712 return 0; 713 } 714 715 static int iscsi_add_notunderstood_response( 716 char *key, 717 char *value, 718 struct iscsi_param_list *param_list) 719 { 720 struct iscsi_extra_response *extra_response; 721 722 if (strlen(value) > VALUE_MAXLEN) { 723 pr_err("Value for notunderstood key \"%s\" exceeds %d," 724 " protocol error.\n", key, VALUE_MAXLEN); 725 return -1; 726 } 727 728 extra_response = kzalloc(sizeof(struct iscsi_extra_response), GFP_KERNEL); 729 if (!extra_response) { 730 pr_err("Unable to allocate memory for" 731 " struct iscsi_extra_response.\n"); 732 return -1; 733 } 734 INIT_LIST_HEAD(&extra_response->er_list); 735 736 strlcpy(extra_response->key, key, sizeof(extra_response->key)); 737 strlcpy(extra_response->value, NOTUNDERSTOOD, 738 sizeof(extra_response->value)); 739 740 list_add_tail(&extra_response->er_list, 741 ¶m_list->extra_response_list); 742 return 0; 743 } 744 745 static int iscsi_check_for_auth_key(char *key) 746 { 747 /* 748 * RFC 1994 749 */ 750 if (!strcmp(key, "CHAP_A") || !strcmp(key, "CHAP_I") || 751 !strcmp(key, "CHAP_C") || !strcmp(key, "CHAP_N") || 752 !strcmp(key, "CHAP_R")) 753 return 1; 754 755 /* 756 * RFC 2945 757 */ 758 if (!strcmp(key, "SRP_U") || !strcmp(key, "SRP_N") || 759 !strcmp(key, "SRP_g") || !strcmp(key, "SRP_s") || 760 !strcmp(key, "SRP_A") || !strcmp(key, "SRP_B") || 761 !strcmp(key, "SRP_M") || !strcmp(key, "SRP_HM")) 762 return 1; 763 764 return 0; 765 } 766 767 static void iscsi_check_proposer_for_optional_reply(struct iscsi_param *param) 768 { 769 if (IS_TYPE_BOOL_AND(param)) { 770 if (!strcmp(param->value, NO)) 771 SET_PSTATE_REPLY_OPTIONAL(param); 772 } else if (IS_TYPE_BOOL_OR(param)) { 773 if (!strcmp(param->value, YES)) 774 SET_PSTATE_REPLY_OPTIONAL(param); 775 /* 776 * Required for gPXE iSCSI boot client 777 */ 778 if (!strcmp(param->name, IMMEDIATEDATA)) 779 SET_PSTATE_REPLY_OPTIONAL(param); 780 } else if (IS_TYPE_NUMBER(param)) { 781 if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) 782 SET_PSTATE_REPLY_OPTIONAL(param); 783 /* 784 * The GlobalSAN iSCSI Initiator for MacOSX does 785 * not respond to MaxBurstLength, FirstBurstLength, 786 * DefaultTime2Wait or DefaultTime2Retain parameter keys. 787 * So, we set them to 'reply optional' here, and assume the 788 * the defaults from iscsi_parameters.h if the initiator 789 * is not RFC compliant and the keys are not negotiated. 790 */ 791 if (!strcmp(param->name, MAXBURSTLENGTH)) 792 SET_PSTATE_REPLY_OPTIONAL(param); 793 if (!strcmp(param->name, FIRSTBURSTLENGTH)) 794 SET_PSTATE_REPLY_OPTIONAL(param); 795 if (!strcmp(param->name, DEFAULTTIME2WAIT)) 796 SET_PSTATE_REPLY_OPTIONAL(param); 797 if (!strcmp(param->name, DEFAULTTIME2RETAIN)) 798 SET_PSTATE_REPLY_OPTIONAL(param); 799 /* 800 * Required for gPXE iSCSI boot client 801 */ 802 if (!strcmp(param->name, MAXCONNECTIONS)) 803 SET_PSTATE_REPLY_OPTIONAL(param); 804 } else if (IS_PHASE_DECLARATIVE(param)) 805 SET_PSTATE_REPLY_OPTIONAL(param); 806 } 807 808 static int iscsi_check_boolean_value(struct iscsi_param *param, char *value) 809 { 810 if (strcmp(value, YES) && strcmp(value, NO)) { 811 pr_err("Illegal value for \"%s\", must be either" 812 " \"%s\" or \"%s\".\n", param->name, YES, NO); 813 return -1; 814 } 815 816 return 0; 817 } 818 819 static int iscsi_check_numerical_value(struct iscsi_param *param, char *value_ptr) 820 { 821 char *tmpptr; 822 int value = 0; 823 824 value = simple_strtoul(value_ptr, &tmpptr, 0); 825 826 if (IS_TYPERANGE_0_TO_2(param)) { 827 if ((value < 0) || (value > 2)) { 828 pr_err("Illegal value for \"%s\", must be" 829 " between 0 and 2.\n", param->name); 830 return -1; 831 } 832 return 0; 833 } 834 if (IS_TYPERANGE_0_TO_3600(param)) { 835 if ((value < 0) || (value > 3600)) { 836 pr_err("Illegal value for \"%s\", must be" 837 " between 0 and 3600.\n", param->name); 838 return -1; 839 } 840 return 0; 841 } 842 if (IS_TYPERANGE_0_TO_32767(param)) { 843 if ((value < 0) || (value > 32767)) { 844 pr_err("Illegal value for \"%s\", must be" 845 " between 0 and 32767.\n", param->name); 846 return -1; 847 } 848 return 0; 849 } 850 if (IS_TYPERANGE_0_TO_65535(param)) { 851 if ((value < 0) || (value > 65535)) { 852 pr_err("Illegal value for \"%s\", must be" 853 " between 0 and 65535.\n", param->name); 854 return -1; 855 } 856 return 0; 857 } 858 if (IS_TYPERANGE_1_TO_65535(param)) { 859 if ((value < 1) || (value > 65535)) { 860 pr_err("Illegal value for \"%s\", must be" 861 " between 1 and 65535.\n", param->name); 862 return -1; 863 } 864 return 0; 865 } 866 if (IS_TYPERANGE_2_TO_3600(param)) { 867 if ((value < 2) || (value > 3600)) { 868 pr_err("Illegal value for \"%s\", must be" 869 " between 2 and 3600.\n", param->name); 870 return -1; 871 } 872 return 0; 873 } 874 if (IS_TYPERANGE_512_TO_16777215(param)) { 875 if ((value < 512) || (value > 16777215)) { 876 pr_err("Illegal value for \"%s\", must be" 877 " between 512 and 16777215.\n", param->name); 878 return -1; 879 } 880 return 0; 881 } 882 883 return 0; 884 } 885 886 static int iscsi_check_string_or_list_value(struct iscsi_param *param, char *value) 887 { 888 if (IS_PSTATE_PROPOSER(param)) 889 return 0; 890 891 if (IS_TYPERANGE_AUTH_PARAM(param)) { 892 if (strcmp(value, KRB5) && strcmp(value, SPKM1) && 893 strcmp(value, SPKM2) && strcmp(value, SRP) && 894 strcmp(value, CHAP) && strcmp(value, NONE)) { 895 pr_err("Illegal value for \"%s\", must be" 896 " \"%s\", \"%s\", \"%s\", \"%s\", \"%s\"" 897 " or \"%s\".\n", param->name, KRB5, 898 SPKM1, SPKM2, SRP, CHAP, NONE); 899 return -1; 900 } 901 } 902 if (IS_TYPERANGE_DIGEST_PARAM(param)) { 903 if (strcmp(value, CRC32C) && strcmp(value, NONE)) { 904 pr_err("Illegal value for \"%s\", must be" 905 " \"%s\" or \"%s\".\n", param->name, 906 CRC32C, NONE); 907 return -1; 908 } 909 } 910 if (IS_TYPERANGE_SESSIONTYPE(param)) { 911 if (strcmp(value, DISCOVERY) && strcmp(value, NORMAL)) { 912 pr_err("Illegal value for \"%s\", must be" 913 " \"%s\" or \"%s\".\n", param->name, 914 DISCOVERY, NORMAL); 915 return -1; 916 } 917 } 918 919 return 0; 920 } 921 922 static char *iscsi_check_valuelist_for_support( 923 struct iscsi_param *param, 924 char *value) 925 { 926 char *tmp1 = NULL, *tmp2 = NULL; 927 char *acceptor_values = NULL, *proposer_values = NULL; 928 929 acceptor_values = param->value; 930 proposer_values = value; 931 932 do { 933 if (!proposer_values) 934 return NULL; 935 tmp1 = strchr(proposer_values, ','); 936 if (tmp1) 937 *tmp1 = '\0'; 938 acceptor_values = param->value; 939 do { 940 if (!acceptor_values) { 941 if (tmp1) 942 *tmp1 = ','; 943 return NULL; 944 } 945 tmp2 = strchr(acceptor_values, ','); 946 if (tmp2) 947 *tmp2 = '\0'; 948 if (!strcmp(acceptor_values, proposer_values)) { 949 if (tmp2) 950 *tmp2 = ','; 951 goto out; 952 } 953 if (tmp2) 954 *tmp2++ = ','; 955 956 acceptor_values = tmp2; 957 } while (acceptor_values); 958 if (tmp1) 959 *tmp1++ = ','; 960 proposer_values = tmp1; 961 } while (proposer_values); 962 963 out: 964 return proposer_values; 965 } 966 967 static int iscsi_check_acceptor_state(struct iscsi_param *param, char *value, 968 struct iscsi_conn *conn) 969 { 970 u8 acceptor_boolean_value = 0, proposer_boolean_value = 0; 971 char *negotiated_value = NULL; 972 973 if (IS_PSTATE_ACCEPTOR(param)) { 974 pr_err("Received key \"%s\" twice, protocol error.\n", 975 param->name); 976 return -1; 977 } 978 979 if (IS_PSTATE_REJECT(param)) 980 return 0; 981 982 if (IS_TYPE_BOOL_AND(param)) { 983 if (!strcmp(value, YES)) 984 proposer_boolean_value = 1; 985 if (!strcmp(param->value, YES)) 986 acceptor_boolean_value = 1; 987 if (acceptor_boolean_value && proposer_boolean_value) 988 do {} while (0); 989 else { 990 if (iscsi_update_param_value(param, NO) < 0) 991 return -1; 992 if (!proposer_boolean_value) 993 SET_PSTATE_REPLY_OPTIONAL(param); 994 } 995 } else if (IS_TYPE_BOOL_OR(param)) { 996 if (!strcmp(value, YES)) 997 proposer_boolean_value = 1; 998 if (!strcmp(param->value, YES)) 999 acceptor_boolean_value = 1; 1000 if (acceptor_boolean_value || proposer_boolean_value) { 1001 if (iscsi_update_param_value(param, YES) < 0) 1002 return -1; 1003 if (proposer_boolean_value) 1004 SET_PSTATE_REPLY_OPTIONAL(param); 1005 } 1006 } else if (IS_TYPE_NUMBER(param)) { 1007 char *tmpptr, buf[11]; 1008 u32 acceptor_value = simple_strtoul(param->value, &tmpptr, 0); 1009 u32 proposer_value = simple_strtoul(value, &tmpptr, 0); 1010 1011 memset(buf, 0, sizeof(buf)); 1012 1013 if (!strcmp(param->name, MAXCONNECTIONS) || 1014 !strcmp(param->name, MAXBURSTLENGTH) || 1015 !strcmp(param->name, FIRSTBURSTLENGTH) || 1016 !strcmp(param->name, MAXOUTSTANDINGR2T) || 1017 !strcmp(param->name, DEFAULTTIME2RETAIN) || 1018 !strcmp(param->name, ERRORRECOVERYLEVEL)) { 1019 if (proposer_value > acceptor_value) { 1020 sprintf(buf, "%u", acceptor_value); 1021 if (iscsi_update_param_value(param, 1022 &buf[0]) < 0) 1023 return -1; 1024 } else { 1025 if (iscsi_update_param_value(param, value) < 0) 1026 return -1; 1027 } 1028 } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) { 1029 if (acceptor_value > proposer_value) { 1030 sprintf(buf, "%u", acceptor_value); 1031 if (iscsi_update_param_value(param, 1032 &buf[0]) < 0) 1033 return -1; 1034 } else { 1035 if (iscsi_update_param_value(param, value) < 0) 1036 return -1; 1037 } 1038 } else { 1039 if (iscsi_update_param_value(param, value) < 0) 1040 return -1; 1041 } 1042 1043 if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) { 1044 struct iscsi_param *param_mxdsl; 1045 unsigned long long tmp; 1046 int rc; 1047 1048 rc = kstrtoull(param->value, 0, &tmp); 1049 if (rc < 0) 1050 return -1; 1051 1052 conn->conn_ops->MaxRecvDataSegmentLength = tmp; 1053 pr_debug("Saving op->MaxRecvDataSegmentLength from" 1054 " original initiator received value: %u\n", 1055 conn->conn_ops->MaxRecvDataSegmentLength); 1056 1057 param_mxdsl = iscsi_find_param_from_key( 1058 MAXXMITDATASEGMENTLENGTH, 1059 conn->param_list); 1060 if (!param_mxdsl) 1061 return -1; 1062 1063 rc = iscsi_update_param_value(param, 1064 param_mxdsl->value); 1065 if (rc < 0) 1066 return -1; 1067 1068 pr_debug("Updated %s to target MXDSL value: %s\n", 1069 param->name, param->value); 1070 } 1071 } else if (IS_TYPE_VALUE_LIST(param)) { 1072 negotiated_value = iscsi_check_valuelist_for_support( 1073 param, value); 1074 if (!negotiated_value) { 1075 pr_err("Proposer's value list \"%s\" contains" 1076 " no valid values from Acceptor's value list" 1077 " \"%s\".\n", value, param->value); 1078 return -1; 1079 } 1080 if (iscsi_update_param_value(param, negotiated_value) < 0) 1081 return -1; 1082 } else if (IS_PHASE_DECLARATIVE(param)) { 1083 if (iscsi_update_param_value(param, value) < 0) 1084 return -1; 1085 SET_PSTATE_REPLY_OPTIONAL(param); 1086 } 1087 1088 return 0; 1089 } 1090 1091 static int iscsi_check_proposer_state(struct iscsi_param *param, char *value) 1092 { 1093 if (IS_PSTATE_RESPONSE_GOT(param)) { 1094 pr_err("Received key \"%s\" twice, protocol error.\n", 1095 param->name); 1096 return -1; 1097 } 1098 1099 if (IS_TYPE_VALUE_LIST(param)) { 1100 char *comma_ptr = NULL, *tmp_ptr = NULL; 1101 1102 comma_ptr = strchr(value, ','); 1103 if (comma_ptr) { 1104 pr_err("Illegal \",\" in response for \"%s\".\n", 1105 param->name); 1106 return -1; 1107 } 1108 1109 tmp_ptr = iscsi_check_valuelist_for_support(param, value); 1110 if (!tmp_ptr) 1111 return -1; 1112 } 1113 1114 if (iscsi_update_param_value(param, value) < 0) 1115 return -1; 1116 1117 return 0; 1118 } 1119 1120 static int iscsi_check_value(struct iscsi_param *param, char *value) 1121 { 1122 char *comma_ptr = NULL; 1123 1124 if (!strcmp(value, REJECT)) { 1125 if (!strcmp(param->name, IFMARKINT) || 1126 !strcmp(param->name, OFMARKINT)) { 1127 /* 1128 * Reject is not fatal for [I,O]FMarkInt, and causes 1129 * [I,O]FMarker to be reset to No. (See iSCSI v20 A.3.2) 1130 */ 1131 SET_PSTATE_REJECT(param); 1132 return 0; 1133 } 1134 pr_err("Received %s=%s\n", param->name, value); 1135 return -1; 1136 } 1137 if (!strcmp(value, IRRELEVANT)) { 1138 pr_debug("Received %s=%s\n", param->name, value); 1139 SET_PSTATE_IRRELEVANT(param); 1140 return 0; 1141 } 1142 if (!strcmp(value, NOTUNDERSTOOD)) { 1143 if (!IS_PSTATE_PROPOSER(param)) { 1144 pr_err("Received illegal offer %s=%s\n", 1145 param->name, value); 1146 return -1; 1147 } 1148 1149 /* #warning FIXME: Add check for X-ExtensionKey here */ 1150 pr_err("Standard iSCSI key \"%s\" cannot be answered" 1151 " with \"%s\", protocol error.\n", param->name, value); 1152 return -1; 1153 } 1154 1155 do { 1156 comma_ptr = NULL; 1157 comma_ptr = strchr(value, ','); 1158 1159 if (comma_ptr && !IS_TYPE_VALUE_LIST(param)) { 1160 pr_err("Detected value separator \",\", but" 1161 " key \"%s\" does not allow a value list," 1162 " protocol error.\n", param->name); 1163 return -1; 1164 } 1165 if (comma_ptr) 1166 *comma_ptr = '\0'; 1167 1168 if (strlen(value) > VALUE_MAXLEN) { 1169 pr_err("Value for key \"%s\" exceeds %d," 1170 " protocol error.\n", param->name, 1171 VALUE_MAXLEN); 1172 return -1; 1173 } 1174 1175 if (IS_TYPE_BOOL_AND(param) || IS_TYPE_BOOL_OR(param)) { 1176 if (iscsi_check_boolean_value(param, value) < 0) 1177 return -1; 1178 } else if (IS_TYPE_NUMBER(param)) { 1179 if (iscsi_check_numerical_value(param, value) < 0) 1180 return -1; 1181 } else if (IS_TYPE_STRING(param) || IS_TYPE_VALUE_LIST(param)) { 1182 if (iscsi_check_string_or_list_value(param, value) < 0) 1183 return -1; 1184 } else { 1185 pr_err("Huh? 0x%02x\n", param->type); 1186 return -1; 1187 } 1188 1189 if (comma_ptr) 1190 *comma_ptr++ = ','; 1191 1192 value = comma_ptr; 1193 } while (value); 1194 1195 return 0; 1196 } 1197 1198 static struct iscsi_param *__iscsi_check_key( 1199 char *key, 1200 int sender, 1201 struct iscsi_param_list *param_list) 1202 { 1203 struct iscsi_param *param; 1204 1205 if (strlen(key) > KEY_MAXLEN) { 1206 pr_err("Length of key name \"%s\" exceeds %d.\n", 1207 key, KEY_MAXLEN); 1208 return NULL; 1209 } 1210 1211 param = iscsi_find_param_from_key(key, param_list); 1212 if (!param) 1213 return NULL; 1214 1215 if ((sender & SENDER_INITIATOR) && !IS_SENDER_INITIATOR(param)) { 1216 pr_err("Key \"%s\" may not be sent to %s," 1217 " protocol error.\n", param->name, 1218 (sender & SENDER_RECEIVER) ? "target" : "initiator"); 1219 return NULL; 1220 } 1221 1222 if ((sender & SENDER_TARGET) && !IS_SENDER_TARGET(param)) { 1223 pr_err("Key \"%s\" may not be sent to %s," 1224 " protocol error.\n", param->name, 1225 (sender & SENDER_RECEIVER) ? "initiator" : "target"); 1226 return NULL; 1227 } 1228 1229 return param; 1230 } 1231 1232 static struct iscsi_param *iscsi_check_key( 1233 char *key, 1234 int phase, 1235 int sender, 1236 struct iscsi_param_list *param_list) 1237 { 1238 struct iscsi_param *param; 1239 /* 1240 * Key name length must not exceed 63 bytes. (See iSCSI v20 5.1) 1241 */ 1242 if (strlen(key) > KEY_MAXLEN) { 1243 pr_err("Length of key name \"%s\" exceeds %d.\n", 1244 key, KEY_MAXLEN); 1245 return NULL; 1246 } 1247 1248 param = iscsi_find_param_from_key(key, param_list); 1249 if (!param) 1250 return NULL; 1251 1252 if ((sender & SENDER_INITIATOR) && !IS_SENDER_INITIATOR(param)) { 1253 pr_err("Key \"%s\" may not be sent to %s," 1254 " protocol error.\n", param->name, 1255 (sender & SENDER_RECEIVER) ? "target" : "initiator"); 1256 return NULL; 1257 } 1258 if ((sender & SENDER_TARGET) && !IS_SENDER_TARGET(param)) { 1259 pr_err("Key \"%s\" may not be sent to %s," 1260 " protocol error.\n", param->name, 1261 (sender & SENDER_RECEIVER) ? "initiator" : "target"); 1262 return NULL; 1263 } 1264 1265 if (IS_PSTATE_ACCEPTOR(param)) { 1266 pr_err("Key \"%s\" received twice, protocol error.\n", 1267 key); 1268 return NULL; 1269 } 1270 1271 if (!phase) 1272 return param; 1273 1274 if (!(param->phase & phase)) { 1275 pr_err("Key \"%s\" may not be negotiated during ", 1276 param->name); 1277 switch (phase) { 1278 case PHASE_SECURITY: 1279 pr_debug("Security phase.\n"); 1280 break; 1281 case PHASE_OPERATIONAL: 1282 pr_debug("Operational phase.\n"); 1283 break; 1284 default: 1285 pr_debug("Unknown phase.\n"); 1286 } 1287 return NULL; 1288 } 1289 1290 return param; 1291 } 1292 1293 static int iscsi_enforce_integrity_rules( 1294 u8 phase, 1295 struct iscsi_param_list *param_list) 1296 { 1297 char *tmpptr; 1298 u8 DataSequenceInOrder = 0; 1299 u8 ErrorRecoveryLevel = 0, SessionType = 0; 1300 u32 FirstBurstLength = 0, MaxBurstLength = 0; 1301 struct iscsi_param *param = NULL; 1302 1303 list_for_each_entry(param, ¶m_list->param_list, p_list) { 1304 if (!(param->phase & phase)) 1305 continue; 1306 if (!strcmp(param->name, SESSIONTYPE)) 1307 if (!strcmp(param->value, NORMAL)) 1308 SessionType = 1; 1309 if (!strcmp(param->name, ERRORRECOVERYLEVEL)) 1310 ErrorRecoveryLevel = simple_strtoul(param->value, 1311 &tmpptr, 0); 1312 if (!strcmp(param->name, DATASEQUENCEINORDER)) 1313 if (!strcmp(param->value, YES)) 1314 DataSequenceInOrder = 1; 1315 if (!strcmp(param->name, MAXBURSTLENGTH)) 1316 MaxBurstLength = simple_strtoul(param->value, 1317 &tmpptr, 0); 1318 } 1319 1320 list_for_each_entry(param, ¶m_list->param_list, p_list) { 1321 if (!(param->phase & phase)) 1322 continue; 1323 if (!SessionType && !IS_PSTATE_ACCEPTOR(param)) 1324 continue; 1325 if (!strcmp(param->name, MAXOUTSTANDINGR2T) && 1326 DataSequenceInOrder && (ErrorRecoveryLevel > 0)) { 1327 if (strcmp(param->value, "1")) { 1328 if (iscsi_update_param_value(param, "1") < 0) 1329 return -1; 1330 pr_debug("Reset \"%s\" to \"%s\".\n", 1331 param->name, param->value); 1332 } 1333 } 1334 if (!strcmp(param->name, MAXCONNECTIONS) && !SessionType) { 1335 if (strcmp(param->value, "1")) { 1336 if (iscsi_update_param_value(param, "1") < 0) 1337 return -1; 1338 pr_debug("Reset \"%s\" to \"%s\".\n", 1339 param->name, param->value); 1340 } 1341 } 1342 if (!strcmp(param->name, FIRSTBURSTLENGTH)) { 1343 FirstBurstLength = simple_strtoul(param->value, 1344 &tmpptr, 0); 1345 if (FirstBurstLength > MaxBurstLength) { 1346 char tmpbuf[11]; 1347 memset(tmpbuf, 0, sizeof(tmpbuf)); 1348 sprintf(tmpbuf, "%u", MaxBurstLength); 1349 if (iscsi_update_param_value(param, tmpbuf)) 1350 return -1; 1351 pr_debug("Reset \"%s\" to \"%s\".\n", 1352 param->name, param->value); 1353 } 1354 } 1355 } 1356 1357 return 0; 1358 } 1359 1360 int iscsi_decode_text_input( 1361 u8 phase, 1362 u8 sender, 1363 char *textbuf, 1364 u32 length, 1365 struct iscsi_conn *conn) 1366 { 1367 struct iscsi_param_list *param_list = conn->param_list; 1368 char *tmpbuf, *start = NULL, *end = NULL; 1369 1370 tmpbuf = kzalloc(length + 1, GFP_KERNEL); 1371 if (!tmpbuf) { 1372 pr_err("Unable to allocate %u + 1 bytes for tmpbuf.\n", length); 1373 return -1; 1374 } 1375 1376 memcpy(tmpbuf, textbuf, length); 1377 tmpbuf[length] = '\0'; 1378 start = tmpbuf; 1379 end = (start + length); 1380 1381 while (start < end) { 1382 char *key, *value; 1383 struct iscsi_param *param; 1384 1385 if (iscsi_extract_key_value(start, &key, &value) < 0) { 1386 kfree(tmpbuf); 1387 return -1; 1388 } 1389 1390 pr_debug("Got key: %s=%s\n", key, value); 1391 1392 if (phase & PHASE_SECURITY) { 1393 if (iscsi_check_for_auth_key(key) > 0) { 1394 kfree(tmpbuf); 1395 return 1; 1396 } 1397 } 1398 1399 param = iscsi_check_key(key, phase, sender, param_list); 1400 if (!param) { 1401 if (iscsi_add_notunderstood_response(key, 1402 value, param_list) < 0) { 1403 kfree(tmpbuf); 1404 return -1; 1405 } 1406 start += strlen(key) + strlen(value) + 2; 1407 continue; 1408 } 1409 if (iscsi_check_value(param, value) < 0) { 1410 kfree(tmpbuf); 1411 return -1; 1412 } 1413 1414 start += strlen(key) + strlen(value) + 2; 1415 1416 if (IS_PSTATE_PROPOSER(param)) { 1417 if (iscsi_check_proposer_state(param, value) < 0) { 1418 kfree(tmpbuf); 1419 return -1; 1420 } 1421 SET_PSTATE_RESPONSE_GOT(param); 1422 } else { 1423 if (iscsi_check_acceptor_state(param, value, conn) < 0) { 1424 kfree(tmpbuf); 1425 return -1; 1426 } 1427 SET_PSTATE_ACCEPTOR(param); 1428 } 1429 } 1430 1431 kfree(tmpbuf); 1432 return 0; 1433 } 1434 1435 int iscsi_encode_text_output( 1436 u8 phase, 1437 u8 sender, 1438 char *textbuf, 1439 u32 *length, 1440 struct iscsi_param_list *param_list) 1441 { 1442 char *output_buf = NULL; 1443 struct iscsi_extra_response *er; 1444 struct iscsi_param *param; 1445 1446 output_buf = textbuf + *length; 1447 1448 if (iscsi_enforce_integrity_rules(phase, param_list) < 0) 1449 return -1; 1450 1451 list_for_each_entry(param, ¶m_list->param_list, p_list) { 1452 if (!(param->sender & sender)) 1453 continue; 1454 if (IS_PSTATE_ACCEPTOR(param) && 1455 !IS_PSTATE_RESPONSE_SENT(param) && 1456 !IS_PSTATE_REPLY_OPTIONAL(param) && 1457 (param->phase & phase)) { 1458 *length += sprintf(output_buf, "%s=%s", 1459 param->name, param->value); 1460 *length += 1; 1461 output_buf = textbuf + *length; 1462 SET_PSTATE_RESPONSE_SENT(param); 1463 pr_debug("Sending key: %s=%s\n", 1464 param->name, param->value); 1465 continue; 1466 } 1467 if (IS_PSTATE_NEGOTIATE(param) && 1468 !IS_PSTATE_ACCEPTOR(param) && 1469 !IS_PSTATE_PROPOSER(param) && 1470 (param->phase & phase)) { 1471 *length += sprintf(output_buf, "%s=%s", 1472 param->name, param->value); 1473 *length += 1; 1474 output_buf = textbuf + *length; 1475 SET_PSTATE_PROPOSER(param); 1476 iscsi_check_proposer_for_optional_reply(param); 1477 pr_debug("Sending key: %s=%s\n", 1478 param->name, param->value); 1479 } 1480 } 1481 1482 list_for_each_entry(er, ¶m_list->extra_response_list, er_list) { 1483 *length += sprintf(output_buf, "%s=%s", er->key, er->value); 1484 *length += 1; 1485 output_buf = textbuf + *length; 1486 pr_debug("Sending key: %s=%s\n", er->key, er->value); 1487 } 1488 iscsi_release_extra_responses(param_list); 1489 1490 return 0; 1491 } 1492 1493 int iscsi_check_negotiated_keys(struct iscsi_param_list *param_list) 1494 { 1495 int ret = 0; 1496 struct iscsi_param *param; 1497 1498 list_for_each_entry(param, ¶m_list->param_list, p_list) { 1499 if (IS_PSTATE_NEGOTIATE(param) && 1500 IS_PSTATE_PROPOSER(param) && 1501 !IS_PSTATE_RESPONSE_GOT(param) && 1502 !IS_PSTATE_REPLY_OPTIONAL(param) && 1503 !IS_PHASE_DECLARATIVE(param)) { 1504 pr_err("No response for proposed key \"%s\".\n", 1505 param->name); 1506 ret = -1; 1507 } 1508 } 1509 1510 return ret; 1511 } 1512 1513 int iscsi_change_param_value( 1514 char *keyvalue, 1515 struct iscsi_param_list *param_list, 1516 int check_key) 1517 { 1518 char *key = NULL, *value = NULL; 1519 struct iscsi_param *param; 1520 int sender = 0; 1521 1522 if (iscsi_extract_key_value(keyvalue, &key, &value) < 0) 1523 return -1; 1524 1525 if (!check_key) { 1526 param = __iscsi_check_key(keyvalue, sender, param_list); 1527 if (!param) 1528 return -1; 1529 } else { 1530 param = iscsi_check_key(keyvalue, 0, sender, param_list); 1531 if (!param) 1532 return -1; 1533 1534 param->set_param = 1; 1535 if (iscsi_check_value(param, value) < 0) { 1536 param->set_param = 0; 1537 return -1; 1538 } 1539 param->set_param = 0; 1540 } 1541 1542 if (iscsi_update_param_value(param, value) < 0) 1543 return -1; 1544 1545 return 0; 1546 } 1547 1548 void iscsi_set_connection_parameters( 1549 struct iscsi_conn_ops *ops, 1550 struct iscsi_param_list *param_list) 1551 { 1552 char *tmpptr; 1553 struct iscsi_param *param; 1554 1555 pr_debug("---------------------------------------------------" 1556 "---------------\n"); 1557 list_for_each_entry(param, ¶m_list->param_list, p_list) { 1558 /* 1559 * Special case to set MAXXMITDATASEGMENTLENGTH from the 1560 * target requested MaxRecvDataSegmentLength, even though 1561 * this key is not sent over the wire. 1562 */ 1563 if (!strcmp(param->name, MAXXMITDATASEGMENTLENGTH)) { 1564 ops->MaxXmitDataSegmentLength = 1565 simple_strtoul(param->value, &tmpptr, 0); 1566 pr_debug("MaxXmitDataSegmentLength: %s\n", 1567 param->value); 1568 } 1569 1570 if (!IS_PSTATE_ACCEPTOR(param) && !IS_PSTATE_PROPOSER(param)) 1571 continue; 1572 if (!strcmp(param->name, AUTHMETHOD)) { 1573 pr_debug("AuthMethod: %s\n", 1574 param->value); 1575 } else if (!strcmp(param->name, HEADERDIGEST)) { 1576 ops->HeaderDigest = !strcmp(param->value, CRC32C); 1577 pr_debug("HeaderDigest: %s\n", 1578 param->value); 1579 } else if (!strcmp(param->name, DATADIGEST)) { 1580 ops->DataDigest = !strcmp(param->value, CRC32C); 1581 pr_debug("DataDigest: %s\n", 1582 param->value); 1583 } else if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) { 1584 /* 1585 * At this point iscsi_check_acceptor_state() will have 1586 * set ops->MaxRecvDataSegmentLength from the original 1587 * initiator provided value. 1588 */ 1589 pr_debug("MaxRecvDataSegmentLength: %u\n", 1590 ops->MaxRecvDataSegmentLength); 1591 } else if (!strcmp(param->name, INITIATORRECVDATASEGMENTLENGTH)) { 1592 ops->InitiatorRecvDataSegmentLength = 1593 simple_strtoul(param->value, &tmpptr, 0); 1594 pr_debug("InitiatorRecvDataSegmentLength: %s\n", 1595 param->value); 1596 ops->MaxRecvDataSegmentLength = 1597 ops->InitiatorRecvDataSegmentLength; 1598 pr_debug("Set MRDSL from InitiatorRecvDataSegmentLength\n"); 1599 } else if (!strcmp(param->name, TARGETRECVDATASEGMENTLENGTH)) { 1600 ops->TargetRecvDataSegmentLength = 1601 simple_strtoul(param->value, &tmpptr, 0); 1602 pr_debug("TargetRecvDataSegmentLength: %s\n", 1603 param->value); 1604 ops->MaxXmitDataSegmentLength = 1605 ops->TargetRecvDataSegmentLength; 1606 pr_debug("Set MXDSL from TargetRecvDataSegmentLength\n"); 1607 } 1608 } 1609 pr_debug("----------------------------------------------------" 1610 "--------------\n"); 1611 } 1612 1613 void iscsi_set_session_parameters( 1614 struct iscsi_sess_ops *ops, 1615 struct iscsi_param_list *param_list, 1616 int leading) 1617 { 1618 char *tmpptr; 1619 struct iscsi_param *param; 1620 1621 pr_debug("----------------------------------------------------" 1622 "--------------\n"); 1623 list_for_each_entry(param, ¶m_list->param_list, p_list) { 1624 if (!IS_PSTATE_ACCEPTOR(param) && !IS_PSTATE_PROPOSER(param)) 1625 continue; 1626 if (!strcmp(param->name, INITIATORNAME)) { 1627 if (!param->value) 1628 continue; 1629 if (leading) 1630 snprintf(ops->InitiatorName, 1631 sizeof(ops->InitiatorName), 1632 "%s", param->value); 1633 pr_debug("InitiatorName: %s\n", 1634 param->value); 1635 } else if (!strcmp(param->name, INITIATORALIAS)) { 1636 if (!param->value) 1637 continue; 1638 snprintf(ops->InitiatorAlias, 1639 sizeof(ops->InitiatorAlias), 1640 "%s", param->value); 1641 pr_debug("InitiatorAlias: %s\n", 1642 param->value); 1643 } else if (!strcmp(param->name, TARGETNAME)) { 1644 if (!param->value) 1645 continue; 1646 if (leading) 1647 snprintf(ops->TargetName, 1648 sizeof(ops->TargetName), 1649 "%s", param->value); 1650 pr_debug("TargetName: %s\n", 1651 param->value); 1652 } else if (!strcmp(param->name, TARGETALIAS)) { 1653 if (!param->value) 1654 continue; 1655 snprintf(ops->TargetAlias, sizeof(ops->TargetAlias), 1656 "%s", param->value); 1657 pr_debug("TargetAlias: %s\n", 1658 param->value); 1659 } else if (!strcmp(param->name, TARGETPORTALGROUPTAG)) { 1660 ops->TargetPortalGroupTag = 1661 simple_strtoul(param->value, &tmpptr, 0); 1662 pr_debug("TargetPortalGroupTag: %s\n", 1663 param->value); 1664 } else if (!strcmp(param->name, MAXCONNECTIONS)) { 1665 ops->MaxConnections = 1666 simple_strtoul(param->value, &tmpptr, 0); 1667 pr_debug("MaxConnections: %s\n", 1668 param->value); 1669 } else if (!strcmp(param->name, INITIALR2T)) { 1670 ops->InitialR2T = !strcmp(param->value, YES); 1671 pr_debug("InitialR2T: %s\n", 1672 param->value); 1673 } else if (!strcmp(param->name, IMMEDIATEDATA)) { 1674 ops->ImmediateData = !strcmp(param->value, YES); 1675 pr_debug("ImmediateData: %s\n", 1676 param->value); 1677 } else if (!strcmp(param->name, MAXBURSTLENGTH)) { 1678 ops->MaxBurstLength = 1679 simple_strtoul(param->value, &tmpptr, 0); 1680 pr_debug("MaxBurstLength: %s\n", 1681 param->value); 1682 } else if (!strcmp(param->name, FIRSTBURSTLENGTH)) { 1683 ops->FirstBurstLength = 1684 simple_strtoul(param->value, &tmpptr, 0); 1685 pr_debug("FirstBurstLength: %s\n", 1686 param->value); 1687 } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) { 1688 ops->DefaultTime2Wait = 1689 simple_strtoul(param->value, &tmpptr, 0); 1690 pr_debug("DefaultTime2Wait: %s\n", 1691 param->value); 1692 } else if (!strcmp(param->name, DEFAULTTIME2RETAIN)) { 1693 ops->DefaultTime2Retain = 1694 simple_strtoul(param->value, &tmpptr, 0); 1695 pr_debug("DefaultTime2Retain: %s\n", 1696 param->value); 1697 } else if (!strcmp(param->name, MAXOUTSTANDINGR2T)) { 1698 ops->MaxOutstandingR2T = 1699 simple_strtoul(param->value, &tmpptr, 0); 1700 pr_debug("MaxOutstandingR2T: %s\n", 1701 param->value); 1702 } else if (!strcmp(param->name, DATAPDUINORDER)) { 1703 ops->DataPDUInOrder = !strcmp(param->value, YES); 1704 pr_debug("DataPDUInOrder: %s\n", 1705 param->value); 1706 } else if (!strcmp(param->name, DATASEQUENCEINORDER)) { 1707 ops->DataSequenceInOrder = !strcmp(param->value, YES); 1708 pr_debug("DataSequenceInOrder: %s\n", 1709 param->value); 1710 } else if (!strcmp(param->name, ERRORRECOVERYLEVEL)) { 1711 ops->ErrorRecoveryLevel = 1712 simple_strtoul(param->value, &tmpptr, 0); 1713 pr_debug("ErrorRecoveryLevel: %s\n", 1714 param->value); 1715 } else if (!strcmp(param->name, SESSIONTYPE)) { 1716 ops->SessionType = !strcmp(param->value, DISCOVERY); 1717 pr_debug("SessionType: %s\n", 1718 param->value); 1719 } else if (!strcmp(param->name, RDMAEXTENSIONS)) { 1720 ops->RDMAExtensions = !strcmp(param->value, YES); 1721 pr_debug("RDMAExtensions: %s\n", 1722 param->value); 1723 } 1724 } 1725 pr_debug("----------------------------------------------------" 1726 "--------------\n"); 1727 1728 } 1729