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 #include <linux/uio.h> /* struct kvec */ 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 -ENOMEM; 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 -ENOMEM; 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 -ENOMEM; 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 EXPORT_SYMBOL(iscsi_find_param_from_key); 684 685 int iscsi_extract_key_value(char *textbuf, char **key, char **value) 686 { 687 *value = strchr(textbuf, '='); 688 if (!*value) { 689 pr_err("Unable to locate \"=\" separator for key," 690 " ignoring request.\n"); 691 return -1; 692 } 693 694 *key = textbuf; 695 **value = '\0'; 696 *value = *value + 1; 697 698 return 0; 699 } 700 701 int iscsi_update_param_value(struct iscsi_param *param, char *value) 702 { 703 kfree(param->value); 704 705 param->value = kstrdup(value, GFP_KERNEL); 706 if (!param->value) { 707 pr_err("Unable to allocate memory for value.\n"); 708 return -ENOMEM; 709 } 710 711 pr_debug("iSCSI Parameter updated to %s=%s\n", 712 param->name, param->value); 713 return 0; 714 } 715 716 static int iscsi_add_notunderstood_response( 717 char *key, 718 char *value, 719 struct iscsi_param_list *param_list) 720 { 721 struct iscsi_extra_response *extra_response; 722 723 if (strlen(value) > VALUE_MAXLEN) { 724 pr_err("Value for notunderstood key \"%s\" exceeds %d," 725 " protocol error.\n", key, VALUE_MAXLEN); 726 return -1; 727 } 728 729 extra_response = kzalloc(sizeof(struct iscsi_extra_response), GFP_KERNEL); 730 if (!extra_response) { 731 pr_err("Unable to allocate memory for" 732 " struct iscsi_extra_response.\n"); 733 return -ENOMEM; 734 } 735 INIT_LIST_HEAD(&extra_response->er_list); 736 737 strlcpy(extra_response->key, key, sizeof(extra_response->key)); 738 strlcpy(extra_response->value, NOTUNDERSTOOD, 739 sizeof(extra_response->value)); 740 741 list_add_tail(&extra_response->er_list, 742 ¶m_list->extra_response_list); 743 return 0; 744 } 745 746 static int iscsi_check_for_auth_key(char *key) 747 { 748 /* 749 * RFC 1994 750 */ 751 if (!strcmp(key, "CHAP_A") || !strcmp(key, "CHAP_I") || 752 !strcmp(key, "CHAP_C") || !strcmp(key, "CHAP_N") || 753 !strcmp(key, "CHAP_R")) 754 return 1; 755 756 /* 757 * RFC 2945 758 */ 759 if (!strcmp(key, "SRP_U") || !strcmp(key, "SRP_N") || 760 !strcmp(key, "SRP_g") || !strcmp(key, "SRP_s") || 761 !strcmp(key, "SRP_A") || !strcmp(key, "SRP_B") || 762 !strcmp(key, "SRP_M") || !strcmp(key, "SRP_HM")) 763 return 1; 764 765 return 0; 766 } 767 768 static void iscsi_check_proposer_for_optional_reply(struct iscsi_param *param, 769 bool keys_workaround) 770 { 771 if (IS_TYPE_BOOL_AND(param)) { 772 if (!strcmp(param->value, NO)) 773 SET_PSTATE_REPLY_OPTIONAL(param); 774 } else if (IS_TYPE_BOOL_OR(param)) { 775 if (!strcmp(param->value, YES)) 776 SET_PSTATE_REPLY_OPTIONAL(param); 777 778 if (keys_workaround) { 779 /* 780 * Required for gPXE iSCSI boot client 781 */ 782 if (!strcmp(param->name, IMMEDIATEDATA)) 783 SET_PSTATE_REPLY_OPTIONAL(param); 784 } 785 } else if (IS_TYPE_NUMBER(param)) { 786 if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) 787 SET_PSTATE_REPLY_OPTIONAL(param); 788 789 if (keys_workaround) { 790 /* 791 * Required for Mellanox Flexboot PXE boot ROM 792 */ 793 if (!strcmp(param->name, FIRSTBURSTLENGTH)) 794 SET_PSTATE_REPLY_OPTIONAL(param); 795 796 /* 797 * Required for gPXE iSCSI boot client 798 */ 799 if (!strcmp(param->name, MAXCONNECTIONS)) 800 SET_PSTATE_REPLY_OPTIONAL(param); 801 } 802 } else if (IS_PHASE_DECLARATIVE(param)) 803 SET_PSTATE_REPLY_OPTIONAL(param); 804 } 805 806 static int iscsi_check_boolean_value(struct iscsi_param *param, char *value) 807 { 808 if (strcmp(value, YES) && strcmp(value, NO)) { 809 pr_err("Illegal value for \"%s\", must be either" 810 " \"%s\" or \"%s\".\n", param->name, YES, NO); 811 return -1; 812 } 813 814 return 0; 815 } 816 817 static int iscsi_check_numerical_value(struct iscsi_param *param, char *value_ptr) 818 { 819 char *tmpptr; 820 int value = 0; 821 822 value = simple_strtoul(value_ptr, &tmpptr, 0); 823 824 if (IS_TYPERANGE_0_TO_2(param)) { 825 if ((value < 0) || (value > 2)) { 826 pr_err("Illegal value for \"%s\", must be" 827 " between 0 and 2.\n", param->name); 828 return -1; 829 } 830 return 0; 831 } 832 if (IS_TYPERANGE_0_TO_3600(param)) { 833 if ((value < 0) || (value > 3600)) { 834 pr_err("Illegal value for \"%s\", must be" 835 " between 0 and 3600.\n", param->name); 836 return -1; 837 } 838 return 0; 839 } 840 if (IS_TYPERANGE_0_TO_32767(param)) { 841 if ((value < 0) || (value > 32767)) { 842 pr_err("Illegal value for \"%s\", must be" 843 " between 0 and 32767.\n", param->name); 844 return -1; 845 } 846 return 0; 847 } 848 if (IS_TYPERANGE_0_TO_65535(param)) { 849 if ((value < 0) || (value > 65535)) { 850 pr_err("Illegal value for \"%s\", must be" 851 " between 0 and 65535.\n", param->name); 852 return -1; 853 } 854 return 0; 855 } 856 if (IS_TYPERANGE_1_TO_65535(param)) { 857 if ((value < 1) || (value > 65535)) { 858 pr_err("Illegal value for \"%s\", must be" 859 " between 1 and 65535.\n", param->name); 860 return -1; 861 } 862 return 0; 863 } 864 if (IS_TYPERANGE_2_TO_3600(param)) { 865 if ((value < 2) || (value > 3600)) { 866 pr_err("Illegal value for \"%s\", must be" 867 " between 2 and 3600.\n", param->name); 868 return -1; 869 } 870 return 0; 871 } 872 if (IS_TYPERANGE_512_TO_16777215(param)) { 873 if ((value < 512) || (value > 16777215)) { 874 pr_err("Illegal value for \"%s\", must be" 875 " between 512 and 16777215.\n", param->name); 876 return -1; 877 } 878 return 0; 879 } 880 881 return 0; 882 } 883 884 static int iscsi_check_string_or_list_value(struct iscsi_param *param, char *value) 885 { 886 if (IS_PSTATE_PROPOSER(param)) 887 return 0; 888 889 if (IS_TYPERANGE_AUTH_PARAM(param)) { 890 if (strcmp(value, KRB5) && strcmp(value, SPKM1) && 891 strcmp(value, SPKM2) && strcmp(value, SRP) && 892 strcmp(value, CHAP) && strcmp(value, NONE)) { 893 pr_err("Illegal value for \"%s\", must be" 894 " \"%s\", \"%s\", \"%s\", \"%s\", \"%s\"" 895 " or \"%s\".\n", param->name, KRB5, 896 SPKM1, SPKM2, SRP, CHAP, NONE); 897 return -1; 898 } 899 } 900 if (IS_TYPERANGE_DIGEST_PARAM(param)) { 901 if (strcmp(value, CRC32C) && strcmp(value, NONE)) { 902 pr_err("Illegal value for \"%s\", must be" 903 " \"%s\" or \"%s\".\n", param->name, 904 CRC32C, NONE); 905 return -1; 906 } 907 } 908 if (IS_TYPERANGE_SESSIONTYPE(param)) { 909 if (strcmp(value, DISCOVERY) && strcmp(value, NORMAL)) { 910 pr_err("Illegal value for \"%s\", must be" 911 " \"%s\" or \"%s\".\n", param->name, 912 DISCOVERY, NORMAL); 913 return -1; 914 } 915 } 916 917 return 0; 918 } 919 920 static char *iscsi_check_valuelist_for_support( 921 struct iscsi_param *param, 922 char *value) 923 { 924 char *tmp1 = NULL, *tmp2 = NULL; 925 char *acceptor_values = NULL, *proposer_values = NULL; 926 927 acceptor_values = param->value; 928 proposer_values = value; 929 930 do { 931 if (!proposer_values) 932 return NULL; 933 tmp1 = strchr(proposer_values, ','); 934 if (tmp1) 935 *tmp1 = '\0'; 936 acceptor_values = param->value; 937 do { 938 if (!acceptor_values) { 939 if (tmp1) 940 *tmp1 = ','; 941 return NULL; 942 } 943 tmp2 = strchr(acceptor_values, ','); 944 if (tmp2) 945 *tmp2 = '\0'; 946 if (!strcmp(acceptor_values, proposer_values)) { 947 if (tmp2) 948 *tmp2 = ','; 949 goto out; 950 } 951 if (tmp2) 952 *tmp2++ = ','; 953 954 acceptor_values = tmp2; 955 } while (acceptor_values); 956 if (tmp1) 957 *tmp1++ = ','; 958 proposer_values = tmp1; 959 } while (proposer_values); 960 961 out: 962 return proposer_values; 963 } 964 965 static int iscsi_check_acceptor_state(struct iscsi_param *param, char *value, 966 struct iscsi_conn *conn) 967 { 968 u8 acceptor_boolean_value = 0, proposer_boolean_value = 0; 969 char *negotiated_value = NULL; 970 971 if (IS_PSTATE_ACCEPTOR(param)) { 972 pr_err("Received key \"%s\" twice, protocol error.\n", 973 param->name); 974 return -1; 975 } 976 977 if (IS_PSTATE_REJECT(param)) 978 return 0; 979 980 if (IS_TYPE_BOOL_AND(param)) { 981 if (!strcmp(value, YES)) 982 proposer_boolean_value = 1; 983 if (!strcmp(param->value, YES)) 984 acceptor_boolean_value = 1; 985 if (acceptor_boolean_value && proposer_boolean_value) 986 do {} while (0); 987 else { 988 if (iscsi_update_param_value(param, NO) < 0) 989 return -1; 990 if (!proposer_boolean_value) 991 SET_PSTATE_REPLY_OPTIONAL(param); 992 } 993 } else if (IS_TYPE_BOOL_OR(param)) { 994 if (!strcmp(value, YES)) 995 proposer_boolean_value = 1; 996 if (!strcmp(param->value, YES)) 997 acceptor_boolean_value = 1; 998 if (acceptor_boolean_value || proposer_boolean_value) { 999 if (iscsi_update_param_value(param, YES) < 0) 1000 return -1; 1001 if (proposer_boolean_value) 1002 SET_PSTATE_REPLY_OPTIONAL(param); 1003 } 1004 } else if (IS_TYPE_NUMBER(param)) { 1005 char *tmpptr, buf[11]; 1006 u32 acceptor_value = simple_strtoul(param->value, &tmpptr, 0); 1007 u32 proposer_value = simple_strtoul(value, &tmpptr, 0); 1008 1009 memset(buf, 0, sizeof(buf)); 1010 1011 if (!strcmp(param->name, MAXCONNECTIONS) || 1012 !strcmp(param->name, MAXBURSTLENGTH) || 1013 !strcmp(param->name, FIRSTBURSTLENGTH) || 1014 !strcmp(param->name, MAXOUTSTANDINGR2T) || 1015 !strcmp(param->name, DEFAULTTIME2RETAIN) || 1016 !strcmp(param->name, ERRORRECOVERYLEVEL)) { 1017 if (proposer_value > acceptor_value) { 1018 sprintf(buf, "%u", acceptor_value); 1019 if (iscsi_update_param_value(param, 1020 &buf[0]) < 0) 1021 return -1; 1022 } else { 1023 if (iscsi_update_param_value(param, value) < 0) 1024 return -1; 1025 } 1026 } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) { 1027 if (acceptor_value > proposer_value) { 1028 sprintf(buf, "%u", acceptor_value); 1029 if (iscsi_update_param_value(param, 1030 &buf[0]) < 0) 1031 return -1; 1032 } else { 1033 if (iscsi_update_param_value(param, value) < 0) 1034 return -1; 1035 } 1036 } else { 1037 if (iscsi_update_param_value(param, value) < 0) 1038 return -1; 1039 } 1040 1041 if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) { 1042 struct iscsi_param *param_mxdsl; 1043 unsigned long long tmp; 1044 int rc; 1045 1046 rc = kstrtoull(param->value, 0, &tmp); 1047 if (rc < 0) 1048 return -1; 1049 1050 conn->conn_ops->MaxRecvDataSegmentLength = tmp; 1051 pr_debug("Saving op->MaxRecvDataSegmentLength from" 1052 " original initiator received value: %u\n", 1053 conn->conn_ops->MaxRecvDataSegmentLength); 1054 1055 param_mxdsl = iscsi_find_param_from_key( 1056 MAXXMITDATASEGMENTLENGTH, 1057 conn->param_list); 1058 if (!param_mxdsl) 1059 return -1; 1060 1061 rc = iscsi_update_param_value(param, 1062 param_mxdsl->value); 1063 if (rc < 0) 1064 return -1; 1065 1066 pr_debug("Updated %s to target MXDSL value: %s\n", 1067 param->name, param->value); 1068 } 1069 } else if (IS_TYPE_VALUE_LIST(param)) { 1070 negotiated_value = iscsi_check_valuelist_for_support( 1071 param, value); 1072 if (!negotiated_value) { 1073 pr_err("Proposer's value list \"%s\" contains" 1074 " no valid values from Acceptor's value list" 1075 " \"%s\".\n", value, param->value); 1076 return -1; 1077 } 1078 if (iscsi_update_param_value(param, negotiated_value) < 0) 1079 return -1; 1080 } else if (IS_PHASE_DECLARATIVE(param)) { 1081 if (iscsi_update_param_value(param, value) < 0) 1082 return -1; 1083 SET_PSTATE_REPLY_OPTIONAL(param); 1084 } 1085 1086 return 0; 1087 } 1088 1089 static int iscsi_check_proposer_state(struct iscsi_param *param, char *value) 1090 { 1091 if (IS_PSTATE_RESPONSE_GOT(param)) { 1092 pr_err("Received key \"%s\" twice, protocol error.\n", 1093 param->name); 1094 return -1; 1095 } 1096 1097 if (IS_TYPE_VALUE_LIST(param)) { 1098 char *comma_ptr = NULL, *tmp_ptr = NULL; 1099 1100 comma_ptr = strchr(value, ','); 1101 if (comma_ptr) { 1102 pr_err("Illegal \",\" in response for \"%s\".\n", 1103 param->name); 1104 return -1; 1105 } 1106 1107 tmp_ptr = iscsi_check_valuelist_for_support(param, value); 1108 if (!tmp_ptr) 1109 return -1; 1110 } 1111 1112 if (iscsi_update_param_value(param, value) < 0) 1113 return -1; 1114 1115 return 0; 1116 } 1117 1118 static int iscsi_check_value(struct iscsi_param *param, char *value) 1119 { 1120 char *comma_ptr = NULL; 1121 1122 if (!strcmp(value, REJECT)) { 1123 if (!strcmp(param->name, IFMARKINT) || 1124 !strcmp(param->name, OFMARKINT)) { 1125 /* 1126 * Reject is not fatal for [I,O]FMarkInt, and causes 1127 * [I,O]FMarker to be reset to No. (See iSCSI v20 A.3.2) 1128 */ 1129 SET_PSTATE_REJECT(param); 1130 return 0; 1131 } 1132 pr_err("Received %s=%s\n", param->name, value); 1133 return -1; 1134 } 1135 if (!strcmp(value, IRRELEVANT)) { 1136 pr_debug("Received %s=%s\n", param->name, value); 1137 SET_PSTATE_IRRELEVANT(param); 1138 return 0; 1139 } 1140 if (!strcmp(value, NOTUNDERSTOOD)) { 1141 if (!IS_PSTATE_PROPOSER(param)) { 1142 pr_err("Received illegal offer %s=%s\n", 1143 param->name, value); 1144 return -1; 1145 } 1146 1147 /* #warning FIXME: Add check for X-ExtensionKey here */ 1148 pr_err("Standard iSCSI key \"%s\" cannot be answered" 1149 " with \"%s\", protocol error.\n", param->name, value); 1150 return -1; 1151 } 1152 1153 do { 1154 comma_ptr = NULL; 1155 comma_ptr = strchr(value, ','); 1156 1157 if (comma_ptr && !IS_TYPE_VALUE_LIST(param)) { 1158 pr_err("Detected value separator \",\", but" 1159 " key \"%s\" does not allow a value list," 1160 " protocol error.\n", param->name); 1161 return -1; 1162 } 1163 if (comma_ptr) 1164 *comma_ptr = '\0'; 1165 1166 if (strlen(value) > VALUE_MAXLEN) { 1167 pr_err("Value for key \"%s\" exceeds %d," 1168 " protocol error.\n", param->name, 1169 VALUE_MAXLEN); 1170 return -1; 1171 } 1172 1173 if (IS_TYPE_BOOL_AND(param) || IS_TYPE_BOOL_OR(param)) { 1174 if (iscsi_check_boolean_value(param, value) < 0) 1175 return -1; 1176 } else if (IS_TYPE_NUMBER(param)) { 1177 if (iscsi_check_numerical_value(param, value) < 0) 1178 return -1; 1179 } else if (IS_TYPE_STRING(param) || IS_TYPE_VALUE_LIST(param)) { 1180 if (iscsi_check_string_or_list_value(param, value) < 0) 1181 return -1; 1182 } else { 1183 pr_err("Huh? 0x%02x\n", param->type); 1184 return -1; 1185 } 1186 1187 if (comma_ptr) 1188 *comma_ptr++ = ','; 1189 1190 value = comma_ptr; 1191 } while (value); 1192 1193 return 0; 1194 } 1195 1196 static struct iscsi_param *__iscsi_check_key( 1197 char *key, 1198 int sender, 1199 struct iscsi_param_list *param_list) 1200 { 1201 struct iscsi_param *param; 1202 1203 if (strlen(key) > KEY_MAXLEN) { 1204 pr_err("Length of key name \"%s\" exceeds %d.\n", 1205 key, KEY_MAXLEN); 1206 return NULL; 1207 } 1208 1209 param = iscsi_find_param_from_key(key, param_list); 1210 if (!param) 1211 return NULL; 1212 1213 if ((sender & SENDER_INITIATOR) && !IS_SENDER_INITIATOR(param)) { 1214 pr_err("Key \"%s\" may not be sent to %s," 1215 " protocol error.\n", param->name, 1216 (sender & SENDER_RECEIVER) ? "target" : "initiator"); 1217 return NULL; 1218 } 1219 1220 if ((sender & SENDER_TARGET) && !IS_SENDER_TARGET(param)) { 1221 pr_err("Key \"%s\" may not be sent to %s," 1222 " protocol error.\n", param->name, 1223 (sender & SENDER_RECEIVER) ? "initiator" : "target"); 1224 return NULL; 1225 } 1226 1227 return param; 1228 } 1229 1230 static struct iscsi_param *iscsi_check_key( 1231 char *key, 1232 int phase, 1233 int sender, 1234 struct iscsi_param_list *param_list) 1235 { 1236 struct iscsi_param *param; 1237 /* 1238 * Key name length must not exceed 63 bytes. (See iSCSI v20 5.1) 1239 */ 1240 if (strlen(key) > KEY_MAXLEN) { 1241 pr_err("Length of key name \"%s\" exceeds %d.\n", 1242 key, KEY_MAXLEN); 1243 return NULL; 1244 } 1245 1246 param = iscsi_find_param_from_key(key, param_list); 1247 if (!param) 1248 return NULL; 1249 1250 if ((sender & SENDER_INITIATOR) && !IS_SENDER_INITIATOR(param)) { 1251 pr_err("Key \"%s\" may not be sent to %s," 1252 " protocol error.\n", param->name, 1253 (sender & SENDER_RECEIVER) ? "target" : "initiator"); 1254 return NULL; 1255 } 1256 if ((sender & SENDER_TARGET) && !IS_SENDER_TARGET(param)) { 1257 pr_err("Key \"%s\" may not be sent to %s," 1258 " protocol error.\n", param->name, 1259 (sender & SENDER_RECEIVER) ? "initiator" : "target"); 1260 return NULL; 1261 } 1262 1263 if (IS_PSTATE_ACCEPTOR(param)) { 1264 pr_err("Key \"%s\" received twice, protocol error.\n", 1265 key); 1266 return NULL; 1267 } 1268 1269 if (!phase) 1270 return param; 1271 1272 if (!(param->phase & phase)) { 1273 pr_err("Key \"%s\" may not be negotiated during ", 1274 param->name); 1275 switch (phase) { 1276 case PHASE_SECURITY: 1277 pr_debug("Security phase.\n"); 1278 break; 1279 case PHASE_OPERATIONAL: 1280 pr_debug("Operational phase.\n"); 1281 break; 1282 default: 1283 pr_debug("Unknown phase.\n"); 1284 } 1285 return NULL; 1286 } 1287 1288 return param; 1289 } 1290 1291 static int iscsi_enforce_integrity_rules( 1292 u8 phase, 1293 struct iscsi_param_list *param_list) 1294 { 1295 char *tmpptr; 1296 u8 DataSequenceInOrder = 0; 1297 u8 ErrorRecoveryLevel = 0, SessionType = 0; 1298 u32 FirstBurstLength = 0, MaxBurstLength = 0; 1299 struct iscsi_param *param = NULL; 1300 1301 list_for_each_entry(param, ¶m_list->param_list, p_list) { 1302 if (!(param->phase & phase)) 1303 continue; 1304 if (!strcmp(param->name, SESSIONTYPE)) 1305 if (!strcmp(param->value, NORMAL)) 1306 SessionType = 1; 1307 if (!strcmp(param->name, ERRORRECOVERYLEVEL)) 1308 ErrorRecoveryLevel = simple_strtoul(param->value, 1309 &tmpptr, 0); 1310 if (!strcmp(param->name, DATASEQUENCEINORDER)) 1311 if (!strcmp(param->value, YES)) 1312 DataSequenceInOrder = 1; 1313 if (!strcmp(param->name, MAXBURSTLENGTH)) 1314 MaxBurstLength = simple_strtoul(param->value, 1315 &tmpptr, 0); 1316 } 1317 1318 list_for_each_entry(param, ¶m_list->param_list, p_list) { 1319 if (!(param->phase & phase)) 1320 continue; 1321 if (!SessionType && !IS_PSTATE_ACCEPTOR(param)) 1322 continue; 1323 if (!strcmp(param->name, MAXOUTSTANDINGR2T) && 1324 DataSequenceInOrder && (ErrorRecoveryLevel > 0)) { 1325 if (strcmp(param->value, "1")) { 1326 if (iscsi_update_param_value(param, "1") < 0) 1327 return -1; 1328 pr_debug("Reset \"%s\" to \"%s\".\n", 1329 param->name, param->value); 1330 } 1331 } 1332 if (!strcmp(param->name, MAXCONNECTIONS) && !SessionType) { 1333 if (strcmp(param->value, "1")) { 1334 if (iscsi_update_param_value(param, "1") < 0) 1335 return -1; 1336 pr_debug("Reset \"%s\" to \"%s\".\n", 1337 param->name, param->value); 1338 } 1339 } 1340 if (!strcmp(param->name, FIRSTBURSTLENGTH)) { 1341 FirstBurstLength = simple_strtoul(param->value, 1342 &tmpptr, 0); 1343 if (FirstBurstLength > MaxBurstLength) { 1344 char tmpbuf[11]; 1345 memset(tmpbuf, 0, sizeof(tmpbuf)); 1346 sprintf(tmpbuf, "%u", MaxBurstLength); 1347 if (iscsi_update_param_value(param, tmpbuf)) 1348 return -1; 1349 pr_debug("Reset \"%s\" to \"%s\".\n", 1350 param->name, param->value); 1351 } 1352 } 1353 } 1354 1355 return 0; 1356 } 1357 1358 int iscsi_decode_text_input( 1359 u8 phase, 1360 u8 sender, 1361 char *textbuf, 1362 u32 length, 1363 struct iscsi_conn *conn) 1364 { 1365 struct iscsi_param_list *param_list = conn->param_list; 1366 char *tmpbuf, *start = NULL, *end = NULL; 1367 1368 tmpbuf = kzalloc(length + 1, GFP_KERNEL); 1369 if (!tmpbuf) { 1370 pr_err("Unable to allocate %u + 1 bytes for tmpbuf.\n", length); 1371 return -ENOMEM; 1372 } 1373 1374 memcpy(tmpbuf, textbuf, length); 1375 tmpbuf[length] = '\0'; 1376 start = tmpbuf; 1377 end = (start + length); 1378 1379 while (start < end) { 1380 char *key, *value; 1381 struct iscsi_param *param; 1382 1383 if (iscsi_extract_key_value(start, &key, &value) < 0) 1384 goto free_buffer; 1385 1386 pr_debug("Got key: %s=%s\n", key, value); 1387 1388 if (phase & PHASE_SECURITY) { 1389 if (iscsi_check_for_auth_key(key) > 0) { 1390 kfree(tmpbuf); 1391 return 1; 1392 } 1393 } 1394 1395 param = iscsi_check_key(key, phase, sender, param_list); 1396 if (!param) { 1397 if (iscsi_add_notunderstood_response(key, value, 1398 param_list) < 0) 1399 goto free_buffer; 1400 1401 start += strlen(key) + strlen(value) + 2; 1402 continue; 1403 } 1404 if (iscsi_check_value(param, value) < 0) 1405 goto free_buffer; 1406 1407 start += strlen(key) + strlen(value) + 2; 1408 1409 if (IS_PSTATE_PROPOSER(param)) { 1410 if (iscsi_check_proposer_state(param, value) < 0) 1411 goto free_buffer; 1412 1413 SET_PSTATE_RESPONSE_GOT(param); 1414 } else { 1415 if (iscsi_check_acceptor_state(param, value, conn) < 0) 1416 goto free_buffer; 1417 1418 SET_PSTATE_ACCEPTOR(param); 1419 } 1420 } 1421 1422 kfree(tmpbuf); 1423 return 0; 1424 1425 free_buffer: 1426 kfree(tmpbuf); 1427 return -1; 1428 } 1429 1430 int iscsi_encode_text_output( 1431 u8 phase, 1432 u8 sender, 1433 char *textbuf, 1434 u32 *length, 1435 struct iscsi_param_list *param_list, 1436 bool keys_workaround) 1437 { 1438 char *output_buf = NULL; 1439 struct iscsi_extra_response *er; 1440 struct iscsi_param *param; 1441 1442 output_buf = textbuf + *length; 1443 1444 if (iscsi_enforce_integrity_rules(phase, param_list) < 0) 1445 return -1; 1446 1447 list_for_each_entry(param, ¶m_list->param_list, p_list) { 1448 if (!(param->sender & sender)) 1449 continue; 1450 if (IS_PSTATE_ACCEPTOR(param) && 1451 !IS_PSTATE_RESPONSE_SENT(param) && 1452 !IS_PSTATE_REPLY_OPTIONAL(param) && 1453 (param->phase & phase)) { 1454 *length += sprintf(output_buf, "%s=%s", 1455 param->name, param->value); 1456 *length += 1; 1457 output_buf = textbuf + *length; 1458 SET_PSTATE_RESPONSE_SENT(param); 1459 pr_debug("Sending key: %s=%s\n", 1460 param->name, param->value); 1461 continue; 1462 } 1463 if (IS_PSTATE_NEGOTIATE(param) && 1464 !IS_PSTATE_ACCEPTOR(param) && 1465 !IS_PSTATE_PROPOSER(param) && 1466 (param->phase & phase)) { 1467 *length += sprintf(output_buf, "%s=%s", 1468 param->name, param->value); 1469 *length += 1; 1470 output_buf = textbuf + *length; 1471 SET_PSTATE_PROPOSER(param); 1472 iscsi_check_proposer_for_optional_reply(param, 1473 keys_workaround); 1474 pr_debug("Sending key: %s=%s\n", 1475 param->name, param->value); 1476 } 1477 } 1478 1479 list_for_each_entry(er, ¶m_list->extra_response_list, er_list) { 1480 *length += sprintf(output_buf, "%s=%s", er->key, er->value); 1481 *length += 1; 1482 output_buf = textbuf + *length; 1483 pr_debug("Sending key: %s=%s\n", er->key, er->value); 1484 } 1485 iscsi_release_extra_responses(param_list); 1486 1487 return 0; 1488 } 1489 1490 int iscsi_check_negotiated_keys(struct iscsi_param_list *param_list) 1491 { 1492 int ret = 0; 1493 struct iscsi_param *param; 1494 1495 list_for_each_entry(param, ¶m_list->param_list, p_list) { 1496 if (IS_PSTATE_NEGOTIATE(param) && 1497 IS_PSTATE_PROPOSER(param) && 1498 !IS_PSTATE_RESPONSE_GOT(param) && 1499 !IS_PSTATE_REPLY_OPTIONAL(param) && 1500 !IS_PHASE_DECLARATIVE(param)) { 1501 pr_err("No response for proposed key \"%s\".\n", 1502 param->name); 1503 ret = -1; 1504 } 1505 } 1506 1507 return ret; 1508 } 1509 1510 int iscsi_change_param_value( 1511 char *keyvalue, 1512 struct iscsi_param_list *param_list, 1513 int check_key) 1514 { 1515 char *key = NULL, *value = NULL; 1516 struct iscsi_param *param; 1517 int sender = 0; 1518 1519 if (iscsi_extract_key_value(keyvalue, &key, &value) < 0) 1520 return -1; 1521 1522 if (!check_key) { 1523 param = __iscsi_check_key(keyvalue, sender, param_list); 1524 if (!param) 1525 return -1; 1526 } else { 1527 param = iscsi_check_key(keyvalue, 0, sender, param_list); 1528 if (!param) 1529 return -1; 1530 1531 param->set_param = 1; 1532 if (iscsi_check_value(param, value) < 0) { 1533 param->set_param = 0; 1534 return -1; 1535 } 1536 param->set_param = 0; 1537 } 1538 1539 if (iscsi_update_param_value(param, value) < 0) 1540 return -1; 1541 1542 return 0; 1543 } 1544 1545 void iscsi_set_connection_parameters( 1546 struct iscsi_conn_ops *ops, 1547 struct iscsi_param_list *param_list) 1548 { 1549 char *tmpptr; 1550 struct iscsi_param *param; 1551 1552 pr_debug("---------------------------------------------------" 1553 "---------------\n"); 1554 list_for_each_entry(param, ¶m_list->param_list, p_list) { 1555 /* 1556 * Special case to set MAXXMITDATASEGMENTLENGTH from the 1557 * target requested MaxRecvDataSegmentLength, even though 1558 * this key is not sent over the wire. 1559 */ 1560 if (!strcmp(param->name, MAXXMITDATASEGMENTLENGTH)) { 1561 ops->MaxXmitDataSegmentLength = 1562 simple_strtoul(param->value, &tmpptr, 0); 1563 pr_debug("MaxXmitDataSegmentLength: %s\n", 1564 param->value); 1565 } 1566 1567 if (!IS_PSTATE_ACCEPTOR(param) && !IS_PSTATE_PROPOSER(param)) 1568 continue; 1569 if (!strcmp(param->name, AUTHMETHOD)) { 1570 pr_debug("AuthMethod: %s\n", 1571 param->value); 1572 } else if (!strcmp(param->name, HEADERDIGEST)) { 1573 ops->HeaderDigest = !strcmp(param->value, CRC32C); 1574 pr_debug("HeaderDigest: %s\n", 1575 param->value); 1576 } else if (!strcmp(param->name, DATADIGEST)) { 1577 ops->DataDigest = !strcmp(param->value, CRC32C); 1578 pr_debug("DataDigest: %s\n", 1579 param->value); 1580 } else if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) { 1581 /* 1582 * At this point iscsi_check_acceptor_state() will have 1583 * set ops->MaxRecvDataSegmentLength from the original 1584 * initiator provided value. 1585 */ 1586 pr_debug("MaxRecvDataSegmentLength: %u\n", 1587 ops->MaxRecvDataSegmentLength); 1588 } else if (!strcmp(param->name, INITIATORRECVDATASEGMENTLENGTH)) { 1589 ops->InitiatorRecvDataSegmentLength = 1590 simple_strtoul(param->value, &tmpptr, 0); 1591 pr_debug("InitiatorRecvDataSegmentLength: %s\n", 1592 param->value); 1593 ops->MaxRecvDataSegmentLength = 1594 ops->InitiatorRecvDataSegmentLength; 1595 pr_debug("Set MRDSL from InitiatorRecvDataSegmentLength\n"); 1596 } else if (!strcmp(param->name, TARGETRECVDATASEGMENTLENGTH)) { 1597 ops->TargetRecvDataSegmentLength = 1598 simple_strtoul(param->value, &tmpptr, 0); 1599 pr_debug("TargetRecvDataSegmentLength: %s\n", 1600 param->value); 1601 ops->MaxXmitDataSegmentLength = 1602 ops->TargetRecvDataSegmentLength; 1603 pr_debug("Set MXDSL from TargetRecvDataSegmentLength\n"); 1604 } 1605 } 1606 pr_debug("----------------------------------------------------" 1607 "--------------\n"); 1608 } 1609 1610 void iscsi_set_session_parameters( 1611 struct iscsi_sess_ops *ops, 1612 struct iscsi_param_list *param_list, 1613 int leading) 1614 { 1615 char *tmpptr; 1616 struct iscsi_param *param; 1617 1618 pr_debug("----------------------------------------------------" 1619 "--------------\n"); 1620 list_for_each_entry(param, ¶m_list->param_list, p_list) { 1621 if (!IS_PSTATE_ACCEPTOR(param) && !IS_PSTATE_PROPOSER(param)) 1622 continue; 1623 if (!strcmp(param->name, INITIATORNAME)) { 1624 if (!param->value) 1625 continue; 1626 if (leading) 1627 snprintf(ops->InitiatorName, 1628 sizeof(ops->InitiatorName), 1629 "%s", param->value); 1630 pr_debug("InitiatorName: %s\n", 1631 param->value); 1632 } else if (!strcmp(param->name, INITIATORALIAS)) { 1633 if (!param->value) 1634 continue; 1635 snprintf(ops->InitiatorAlias, 1636 sizeof(ops->InitiatorAlias), 1637 "%s", param->value); 1638 pr_debug("InitiatorAlias: %s\n", 1639 param->value); 1640 } else if (!strcmp(param->name, TARGETNAME)) { 1641 if (!param->value) 1642 continue; 1643 if (leading) 1644 snprintf(ops->TargetName, 1645 sizeof(ops->TargetName), 1646 "%s", param->value); 1647 pr_debug("TargetName: %s\n", 1648 param->value); 1649 } else if (!strcmp(param->name, TARGETALIAS)) { 1650 if (!param->value) 1651 continue; 1652 snprintf(ops->TargetAlias, sizeof(ops->TargetAlias), 1653 "%s", param->value); 1654 pr_debug("TargetAlias: %s\n", 1655 param->value); 1656 } else if (!strcmp(param->name, TARGETPORTALGROUPTAG)) { 1657 ops->TargetPortalGroupTag = 1658 simple_strtoul(param->value, &tmpptr, 0); 1659 pr_debug("TargetPortalGroupTag: %s\n", 1660 param->value); 1661 } else if (!strcmp(param->name, MAXCONNECTIONS)) { 1662 ops->MaxConnections = 1663 simple_strtoul(param->value, &tmpptr, 0); 1664 pr_debug("MaxConnections: %s\n", 1665 param->value); 1666 } else if (!strcmp(param->name, INITIALR2T)) { 1667 ops->InitialR2T = !strcmp(param->value, YES); 1668 pr_debug("InitialR2T: %s\n", 1669 param->value); 1670 } else if (!strcmp(param->name, IMMEDIATEDATA)) { 1671 ops->ImmediateData = !strcmp(param->value, YES); 1672 pr_debug("ImmediateData: %s\n", 1673 param->value); 1674 } else if (!strcmp(param->name, MAXBURSTLENGTH)) { 1675 ops->MaxBurstLength = 1676 simple_strtoul(param->value, &tmpptr, 0); 1677 pr_debug("MaxBurstLength: %s\n", 1678 param->value); 1679 } else if (!strcmp(param->name, FIRSTBURSTLENGTH)) { 1680 ops->FirstBurstLength = 1681 simple_strtoul(param->value, &tmpptr, 0); 1682 pr_debug("FirstBurstLength: %s\n", 1683 param->value); 1684 } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) { 1685 ops->DefaultTime2Wait = 1686 simple_strtoul(param->value, &tmpptr, 0); 1687 pr_debug("DefaultTime2Wait: %s\n", 1688 param->value); 1689 } else if (!strcmp(param->name, DEFAULTTIME2RETAIN)) { 1690 ops->DefaultTime2Retain = 1691 simple_strtoul(param->value, &tmpptr, 0); 1692 pr_debug("DefaultTime2Retain: %s\n", 1693 param->value); 1694 } else if (!strcmp(param->name, MAXOUTSTANDINGR2T)) { 1695 ops->MaxOutstandingR2T = 1696 simple_strtoul(param->value, &tmpptr, 0); 1697 pr_debug("MaxOutstandingR2T: %s\n", 1698 param->value); 1699 } else if (!strcmp(param->name, DATAPDUINORDER)) { 1700 ops->DataPDUInOrder = !strcmp(param->value, YES); 1701 pr_debug("DataPDUInOrder: %s\n", 1702 param->value); 1703 } else if (!strcmp(param->name, DATASEQUENCEINORDER)) { 1704 ops->DataSequenceInOrder = !strcmp(param->value, YES); 1705 pr_debug("DataSequenceInOrder: %s\n", 1706 param->value); 1707 } else if (!strcmp(param->name, ERRORRECOVERYLEVEL)) { 1708 ops->ErrorRecoveryLevel = 1709 simple_strtoul(param->value, &tmpptr, 0); 1710 pr_debug("ErrorRecoveryLevel: %s\n", 1711 param->value); 1712 } else if (!strcmp(param->name, SESSIONTYPE)) { 1713 ops->SessionType = !strcmp(param->value, DISCOVERY); 1714 pr_debug("SessionType: %s\n", 1715 param->value); 1716 } else if (!strcmp(param->name, RDMAEXTENSIONS)) { 1717 ops->RDMAExtensions = !strcmp(param->value, YES); 1718 pr_debug("RDMAExtensions: %s\n", 1719 param->value); 1720 } 1721 } 1722 pr_debug("----------------------------------------------------" 1723 "--------------\n"); 1724 1725 } 1726