1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /******************************************************************************* 3 * This file contains main functions related to iSCSI Parameter negotiation. 4 * 5 * (c) Copyright 2007-2013 Datera, Inc. 6 * 7 * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> 8 * 9 ******************************************************************************/ 10 11 #include <linux/slab.h> 12 #include <linux/uio.h> /* struct kvec */ 13 #include <target/iscsi/iscsi_target_core.h> 14 #include "iscsi_target_util.h" 15 #include "iscsi_target_parameters.h" 16 17 int iscsi_login_rx_data( 18 struct iscsit_conn *conn, 19 char *buf, 20 int length) 21 { 22 int rx_got; 23 struct kvec iov; 24 25 memset(&iov, 0, sizeof(struct kvec)); 26 iov.iov_len = length; 27 iov.iov_base = buf; 28 29 rx_got = rx_data(conn, &iov, 1, length); 30 if (rx_got != length) { 31 pr_err("rx_data returned %d, expecting %d.\n", 32 rx_got, length); 33 return -1; 34 } 35 36 return 0 ; 37 } 38 39 int iscsi_login_tx_data( 40 struct iscsit_conn *conn, 41 char *pdu_buf, 42 char *text_buf, 43 int text_length) 44 { 45 int length, tx_sent, iov_cnt = 1; 46 struct kvec iov[2]; 47 48 length = (ISCSI_HDR_LEN + text_length); 49 50 memset(&iov[0], 0, 2 * sizeof(struct kvec)); 51 iov[0].iov_len = ISCSI_HDR_LEN; 52 iov[0].iov_base = pdu_buf; 53 54 if (text_buf && text_length) { 55 iov[1].iov_len = text_length; 56 iov[1].iov_base = text_buf; 57 iov_cnt++; 58 } 59 60 tx_sent = tx_data(conn, &iov[0], iov_cnt, length); 61 if (tx_sent != length) { 62 pr_err("tx_data returned %d, expecting %d.\n", 63 tx_sent, length); 64 return -1; 65 } 66 67 return 0; 68 } 69 70 static struct iscsi_param *iscsi_set_default_param(struct iscsi_param_list *param_list, 71 char *name, char *value, u8 phase, u8 scope, u8 sender, 72 u16 type_range, u8 use) 73 { 74 struct iscsi_param *param = NULL; 75 76 param = kzalloc(sizeof(struct iscsi_param), GFP_KERNEL); 77 if (!param) { 78 pr_err("Unable to allocate memory for parameter.\n"); 79 goto out; 80 } 81 INIT_LIST_HEAD(¶m->p_list); 82 83 param->name = kstrdup(name, GFP_KERNEL); 84 if (!param->name) { 85 pr_err("Unable to allocate memory for parameter name.\n"); 86 goto out; 87 } 88 89 param->value = kstrdup(value, GFP_KERNEL); 90 if (!param->value) { 91 pr_err("Unable to allocate memory for parameter value.\n"); 92 goto out; 93 } 94 95 param->phase = phase; 96 param->scope = scope; 97 param->sender = sender; 98 param->use = use; 99 param->type_range = type_range; 100 101 switch (param->type_range) { 102 case TYPERANGE_BOOL_AND: 103 param->type = TYPE_BOOL_AND; 104 break; 105 case TYPERANGE_BOOL_OR: 106 param->type = TYPE_BOOL_OR; 107 break; 108 case TYPERANGE_0_TO_2: 109 case TYPERANGE_0_TO_3600: 110 case TYPERANGE_0_TO_32767: 111 case TYPERANGE_0_TO_65535: 112 case TYPERANGE_1_TO_65535: 113 case TYPERANGE_2_TO_3600: 114 case TYPERANGE_512_TO_16777215: 115 param->type = TYPE_NUMBER; 116 break; 117 case TYPERANGE_AUTH: 118 case TYPERANGE_DIGEST: 119 param->type = TYPE_VALUE_LIST | TYPE_STRING; 120 break; 121 case TYPERANGE_ISCSINAME: 122 case TYPERANGE_SESSIONTYPE: 123 case TYPERANGE_TARGETADDRESS: 124 case TYPERANGE_UTF8: 125 param->type = TYPE_STRING; 126 break; 127 default: 128 pr_err("Unknown type_range 0x%02x\n", 129 param->type_range); 130 goto out; 131 } 132 list_add_tail(¶m->p_list, ¶m_list->param_list); 133 134 return param; 135 out: 136 if (param) { 137 kfree(param->value); 138 kfree(param->name); 139 kfree(param); 140 } 141 142 return NULL; 143 } 144 145 /* #warning Add extension keys */ 146 int iscsi_create_default_params(struct iscsi_param_list **param_list_ptr) 147 { 148 struct iscsi_param *param = NULL; 149 struct iscsi_param_list *pl; 150 151 pl = kzalloc(sizeof(struct iscsi_param_list), GFP_KERNEL); 152 if (!pl) { 153 pr_err("Unable to allocate memory for" 154 " struct iscsi_param_list.\n"); 155 return -ENOMEM; 156 } 157 INIT_LIST_HEAD(&pl->param_list); 158 INIT_LIST_HEAD(&pl->extra_response_list); 159 160 /* 161 * The format for setting the initial parameter definitions are: 162 * 163 * Parameter name: 164 * Initial value: 165 * Allowable phase: 166 * Scope: 167 * Allowable senders: 168 * Typerange: 169 * Use: 170 */ 171 param = iscsi_set_default_param(pl, AUTHMETHOD, INITIAL_AUTHMETHOD, 172 PHASE_SECURITY, SCOPE_CONNECTION_ONLY, SENDER_BOTH, 173 TYPERANGE_AUTH, USE_INITIAL_ONLY); 174 if (!param) 175 goto out; 176 177 param = iscsi_set_default_param(pl, HEADERDIGEST, INITIAL_HEADERDIGEST, 178 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH, 179 TYPERANGE_DIGEST, USE_INITIAL_ONLY); 180 if (!param) 181 goto out; 182 183 param = iscsi_set_default_param(pl, DATADIGEST, INITIAL_DATADIGEST, 184 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH, 185 TYPERANGE_DIGEST, USE_INITIAL_ONLY); 186 if (!param) 187 goto out; 188 189 param = iscsi_set_default_param(pl, MAXCONNECTIONS, 190 INITIAL_MAXCONNECTIONS, PHASE_OPERATIONAL, 191 SCOPE_SESSION_WIDE, SENDER_BOTH, 192 TYPERANGE_1_TO_65535, USE_LEADING_ONLY); 193 if (!param) 194 goto out; 195 196 param = iscsi_set_default_param(pl, SENDTARGETS, INITIAL_SENDTARGETS, 197 PHASE_FFP0, SCOPE_SESSION_WIDE, SENDER_INITIATOR, 198 TYPERANGE_UTF8, 0); 199 if (!param) 200 goto out; 201 202 param = iscsi_set_default_param(pl, TARGETNAME, INITIAL_TARGETNAME, 203 PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_BOTH, 204 TYPERANGE_ISCSINAME, USE_ALL); 205 if (!param) 206 goto out; 207 208 param = iscsi_set_default_param(pl, INITIATORNAME, 209 INITIAL_INITIATORNAME, PHASE_DECLARATIVE, 210 SCOPE_SESSION_WIDE, SENDER_INITIATOR, 211 TYPERANGE_ISCSINAME, USE_INITIAL_ONLY); 212 if (!param) 213 goto out; 214 215 param = iscsi_set_default_param(pl, TARGETALIAS, INITIAL_TARGETALIAS, 216 PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_TARGET, 217 TYPERANGE_UTF8, USE_ALL); 218 if (!param) 219 goto out; 220 221 param = iscsi_set_default_param(pl, INITIATORALIAS, 222 INITIAL_INITIATORALIAS, PHASE_DECLARATIVE, 223 SCOPE_SESSION_WIDE, SENDER_INITIATOR, TYPERANGE_UTF8, 224 USE_ALL); 225 if (!param) 226 goto out; 227 228 param = iscsi_set_default_param(pl, TARGETADDRESS, 229 INITIAL_TARGETADDRESS, PHASE_DECLARATIVE, 230 SCOPE_SESSION_WIDE, SENDER_TARGET, 231 TYPERANGE_TARGETADDRESS, USE_ALL); 232 if (!param) 233 goto out; 234 235 param = iscsi_set_default_param(pl, TARGETPORTALGROUPTAG, 236 INITIAL_TARGETPORTALGROUPTAG, 237 PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_TARGET, 238 TYPERANGE_0_TO_65535, USE_INITIAL_ONLY); 239 if (!param) 240 goto out; 241 242 param = iscsi_set_default_param(pl, INITIALR2T, INITIAL_INITIALR2T, 243 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH, 244 TYPERANGE_BOOL_OR, USE_LEADING_ONLY); 245 if (!param) 246 goto out; 247 248 param = iscsi_set_default_param(pl, IMMEDIATEDATA, 249 INITIAL_IMMEDIATEDATA, PHASE_OPERATIONAL, 250 SCOPE_SESSION_WIDE, SENDER_BOTH, TYPERANGE_BOOL_AND, 251 USE_LEADING_ONLY); 252 if (!param) 253 goto out; 254 255 param = iscsi_set_default_param(pl, MAXXMITDATASEGMENTLENGTH, 256 INITIAL_MAXXMITDATASEGMENTLENGTH, 257 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH, 258 TYPERANGE_512_TO_16777215, USE_ALL); 259 if (!param) 260 goto out; 261 262 param = iscsi_set_default_param(pl, MAXRECVDATASEGMENTLENGTH, 263 INITIAL_MAXRECVDATASEGMENTLENGTH, 264 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH, 265 TYPERANGE_512_TO_16777215, USE_ALL); 266 if (!param) 267 goto out; 268 269 param = iscsi_set_default_param(pl, MAXBURSTLENGTH, 270 INITIAL_MAXBURSTLENGTH, PHASE_OPERATIONAL, 271 SCOPE_SESSION_WIDE, SENDER_BOTH, 272 TYPERANGE_512_TO_16777215, USE_LEADING_ONLY); 273 if (!param) 274 goto out; 275 276 param = iscsi_set_default_param(pl, FIRSTBURSTLENGTH, 277 INITIAL_FIRSTBURSTLENGTH, 278 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH, 279 TYPERANGE_512_TO_16777215, USE_LEADING_ONLY); 280 if (!param) 281 goto out; 282 283 param = iscsi_set_default_param(pl, DEFAULTTIME2WAIT, 284 INITIAL_DEFAULTTIME2WAIT, 285 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH, 286 TYPERANGE_0_TO_3600, USE_LEADING_ONLY); 287 if (!param) 288 goto out; 289 290 param = iscsi_set_default_param(pl, DEFAULTTIME2RETAIN, 291 INITIAL_DEFAULTTIME2RETAIN, 292 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH, 293 TYPERANGE_0_TO_3600, USE_LEADING_ONLY); 294 if (!param) 295 goto out; 296 297 param = iscsi_set_default_param(pl, MAXOUTSTANDINGR2T, 298 INITIAL_MAXOUTSTANDINGR2T, 299 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH, 300 TYPERANGE_1_TO_65535, USE_LEADING_ONLY); 301 if (!param) 302 goto out; 303 304 param = iscsi_set_default_param(pl, DATAPDUINORDER, 305 INITIAL_DATAPDUINORDER, PHASE_OPERATIONAL, 306 SCOPE_SESSION_WIDE, SENDER_BOTH, TYPERANGE_BOOL_OR, 307 USE_LEADING_ONLY); 308 if (!param) 309 goto out; 310 311 param = iscsi_set_default_param(pl, DATASEQUENCEINORDER, 312 INITIAL_DATASEQUENCEINORDER, 313 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH, 314 TYPERANGE_BOOL_OR, USE_LEADING_ONLY); 315 if (!param) 316 goto out; 317 318 param = iscsi_set_default_param(pl, ERRORRECOVERYLEVEL, 319 INITIAL_ERRORRECOVERYLEVEL, 320 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH, 321 TYPERANGE_0_TO_2, USE_LEADING_ONLY); 322 if (!param) 323 goto out; 324 325 param = iscsi_set_default_param(pl, SESSIONTYPE, INITIAL_SESSIONTYPE, 326 PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_INITIATOR, 327 TYPERANGE_SESSIONTYPE, USE_LEADING_ONLY); 328 if (!param) 329 goto out; 330 331 param = iscsi_set_default_param(pl, IFMARKER, INITIAL_IFMARKER, 332 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH, 333 TYPERANGE_BOOL_AND, USE_INITIAL_ONLY); 334 if (!param) 335 goto out; 336 337 param = iscsi_set_default_param(pl, OFMARKER, INITIAL_OFMARKER, 338 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH, 339 TYPERANGE_BOOL_AND, USE_INITIAL_ONLY); 340 if (!param) 341 goto out; 342 343 param = iscsi_set_default_param(pl, IFMARKINT, INITIAL_IFMARKINT, 344 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH, 345 TYPERANGE_UTF8, USE_INITIAL_ONLY); 346 if (!param) 347 goto out; 348 349 param = iscsi_set_default_param(pl, OFMARKINT, INITIAL_OFMARKINT, 350 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH, 351 TYPERANGE_UTF8, USE_INITIAL_ONLY); 352 if (!param) 353 goto out; 354 355 /* 356 * Extra parameters for ISER from RFC-5046 357 */ 358 param = iscsi_set_default_param(pl, RDMAEXTENSIONS, INITIAL_RDMAEXTENSIONS, 359 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH, 360 TYPERANGE_BOOL_AND, USE_LEADING_ONLY); 361 if (!param) 362 goto out; 363 364 param = iscsi_set_default_param(pl, INITIATORRECVDATASEGMENTLENGTH, 365 INITIAL_INITIATORRECVDATASEGMENTLENGTH, 366 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH, 367 TYPERANGE_512_TO_16777215, USE_ALL); 368 if (!param) 369 goto out; 370 371 param = iscsi_set_default_param(pl, TARGETRECVDATASEGMENTLENGTH, 372 INITIAL_TARGETRECVDATASEGMENTLENGTH, 373 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH, 374 TYPERANGE_512_TO_16777215, USE_ALL); 375 if (!param) 376 goto out; 377 378 *param_list_ptr = pl; 379 return 0; 380 out: 381 iscsi_release_param_list(pl); 382 return -1; 383 } 384 385 int iscsi_set_keys_to_negotiate( 386 struct iscsi_param_list *param_list, 387 bool iser) 388 { 389 struct iscsi_param *param; 390 391 param_list->iser = iser; 392 393 list_for_each_entry(param, ¶m_list->param_list, p_list) { 394 param->state = 0; 395 if (!strcmp(param->name, AUTHMETHOD)) { 396 SET_PSTATE_NEGOTIATE(param); 397 } else if (!strcmp(param->name, HEADERDIGEST)) { 398 if (!iser) 399 SET_PSTATE_NEGOTIATE(param); 400 } else if (!strcmp(param->name, DATADIGEST)) { 401 if (!iser) 402 SET_PSTATE_NEGOTIATE(param); 403 } else if (!strcmp(param->name, MAXCONNECTIONS)) { 404 SET_PSTATE_NEGOTIATE(param); 405 } else if (!strcmp(param->name, TARGETNAME)) { 406 continue; 407 } else if (!strcmp(param->name, INITIATORNAME)) { 408 continue; 409 } else if (!strcmp(param->name, TARGETALIAS)) { 410 if (param->value) 411 SET_PSTATE_NEGOTIATE(param); 412 } else if (!strcmp(param->name, INITIATORALIAS)) { 413 continue; 414 } else if (!strcmp(param->name, TARGETPORTALGROUPTAG)) { 415 SET_PSTATE_NEGOTIATE(param); 416 } else if (!strcmp(param->name, INITIALR2T)) { 417 SET_PSTATE_NEGOTIATE(param); 418 } else if (!strcmp(param->name, IMMEDIATEDATA)) { 419 SET_PSTATE_NEGOTIATE(param); 420 } else if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) { 421 if (!iser) 422 SET_PSTATE_NEGOTIATE(param); 423 } else if (!strcmp(param->name, MAXXMITDATASEGMENTLENGTH)) { 424 continue; 425 } else if (!strcmp(param->name, MAXBURSTLENGTH)) { 426 SET_PSTATE_NEGOTIATE(param); 427 } else if (!strcmp(param->name, FIRSTBURSTLENGTH)) { 428 SET_PSTATE_NEGOTIATE(param); 429 } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) { 430 SET_PSTATE_NEGOTIATE(param); 431 } else if (!strcmp(param->name, DEFAULTTIME2RETAIN)) { 432 SET_PSTATE_NEGOTIATE(param); 433 } else if (!strcmp(param->name, MAXOUTSTANDINGR2T)) { 434 SET_PSTATE_NEGOTIATE(param); 435 } else if (!strcmp(param->name, DATAPDUINORDER)) { 436 SET_PSTATE_NEGOTIATE(param); 437 } else if (!strcmp(param->name, DATASEQUENCEINORDER)) { 438 SET_PSTATE_NEGOTIATE(param); 439 } else if (!strcmp(param->name, ERRORRECOVERYLEVEL)) { 440 SET_PSTATE_NEGOTIATE(param); 441 } else if (!strcmp(param->name, SESSIONTYPE)) { 442 SET_PSTATE_NEGOTIATE(param); 443 } else if (!strcmp(param->name, IFMARKER)) { 444 SET_PSTATE_REJECT(param); 445 } else if (!strcmp(param->name, OFMARKER)) { 446 SET_PSTATE_REJECT(param); 447 } else if (!strcmp(param->name, IFMARKINT)) { 448 SET_PSTATE_REJECT(param); 449 } else if (!strcmp(param->name, OFMARKINT)) { 450 SET_PSTATE_REJECT(param); 451 } else if (!strcmp(param->name, RDMAEXTENSIONS)) { 452 if (iser) 453 SET_PSTATE_NEGOTIATE(param); 454 } else if (!strcmp(param->name, INITIATORRECVDATASEGMENTLENGTH)) { 455 if (iser) 456 SET_PSTATE_NEGOTIATE(param); 457 } else if (!strcmp(param->name, TARGETRECVDATASEGMENTLENGTH)) { 458 if (iser) 459 SET_PSTATE_NEGOTIATE(param); 460 } 461 } 462 463 return 0; 464 } 465 466 int iscsi_set_keys_irrelevant_for_discovery( 467 struct iscsi_param_list *param_list) 468 { 469 struct iscsi_param *param; 470 471 list_for_each_entry(param, ¶m_list->param_list, p_list) { 472 if (!strcmp(param->name, MAXCONNECTIONS)) 473 param->state &= ~PSTATE_NEGOTIATE; 474 else if (!strcmp(param->name, INITIALR2T)) 475 param->state &= ~PSTATE_NEGOTIATE; 476 else if (!strcmp(param->name, IMMEDIATEDATA)) 477 param->state &= ~PSTATE_NEGOTIATE; 478 else if (!strcmp(param->name, MAXBURSTLENGTH)) 479 param->state &= ~PSTATE_NEGOTIATE; 480 else if (!strcmp(param->name, FIRSTBURSTLENGTH)) 481 param->state &= ~PSTATE_NEGOTIATE; 482 else if (!strcmp(param->name, MAXOUTSTANDINGR2T)) 483 param->state &= ~PSTATE_NEGOTIATE; 484 else if (!strcmp(param->name, DATAPDUINORDER)) 485 param->state &= ~PSTATE_NEGOTIATE; 486 else if (!strcmp(param->name, DATASEQUENCEINORDER)) 487 param->state &= ~PSTATE_NEGOTIATE; 488 else if (!strcmp(param->name, ERRORRECOVERYLEVEL)) 489 param->state &= ~PSTATE_NEGOTIATE; 490 else if (!strcmp(param->name, DEFAULTTIME2WAIT)) 491 param->state &= ~PSTATE_NEGOTIATE; 492 else if (!strcmp(param->name, DEFAULTTIME2RETAIN)) 493 param->state &= ~PSTATE_NEGOTIATE; 494 else if (!strcmp(param->name, IFMARKER)) 495 param->state &= ~PSTATE_NEGOTIATE; 496 else if (!strcmp(param->name, OFMARKER)) 497 param->state &= ~PSTATE_NEGOTIATE; 498 else if (!strcmp(param->name, IFMARKINT)) 499 param->state &= ~PSTATE_NEGOTIATE; 500 else if (!strcmp(param->name, OFMARKINT)) 501 param->state &= ~PSTATE_NEGOTIATE; 502 else if (!strcmp(param->name, RDMAEXTENSIONS)) 503 param->state &= ~PSTATE_NEGOTIATE; 504 else if (!strcmp(param->name, INITIATORRECVDATASEGMENTLENGTH)) 505 param->state &= ~PSTATE_NEGOTIATE; 506 else if (!strcmp(param->name, TARGETRECVDATASEGMENTLENGTH)) 507 param->state &= ~PSTATE_NEGOTIATE; 508 } 509 510 return 0; 511 } 512 513 int iscsi_copy_param_list( 514 struct iscsi_param_list **dst_param_list, 515 struct iscsi_param_list *src_param_list, 516 int leading) 517 { 518 struct iscsi_param *param = NULL; 519 struct iscsi_param *new_param = NULL; 520 struct iscsi_param_list *param_list = NULL; 521 522 param_list = kzalloc(sizeof(struct iscsi_param_list), GFP_KERNEL); 523 if (!param_list) { 524 pr_err("Unable to allocate memory for struct iscsi_param_list.\n"); 525 return -ENOMEM; 526 } 527 INIT_LIST_HEAD(¶m_list->param_list); 528 INIT_LIST_HEAD(¶m_list->extra_response_list); 529 530 list_for_each_entry(param, &src_param_list->param_list, p_list) { 531 if (!leading && (param->scope & SCOPE_SESSION_WIDE)) { 532 if ((strcmp(param->name, "TargetName") != 0) && 533 (strcmp(param->name, "InitiatorName") != 0) && 534 (strcmp(param->name, "TargetPortalGroupTag") != 0)) 535 continue; 536 } 537 538 new_param = kzalloc(sizeof(struct iscsi_param), GFP_KERNEL); 539 if (!new_param) { 540 pr_err("Unable to allocate memory for struct iscsi_param.\n"); 541 goto err_out; 542 } 543 544 new_param->name = kstrdup(param->name, GFP_KERNEL); 545 new_param->value = kstrdup(param->value, GFP_KERNEL); 546 if (!new_param->value || !new_param->name) { 547 kfree(new_param->value); 548 kfree(new_param->name); 549 kfree(new_param); 550 pr_err("Unable to allocate memory for parameter name/value.\n"); 551 goto err_out; 552 } 553 554 new_param->set_param = param->set_param; 555 new_param->phase = param->phase; 556 new_param->scope = param->scope; 557 new_param->sender = param->sender; 558 new_param->type = param->type; 559 new_param->use = param->use; 560 new_param->type_range = param->type_range; 561 562 list_add_tail(&new_param->p_list, ¶m_list->param_list); 563 } 564 565 if (!list_empty(¶m_list->param_list)) { 566 *dst_param_list = param_list; 567 } else { 568 pr_err("No parameters allocated.\n"); 569 goto err_out; 570 } 571 572 return 0; 573 574 err_out: 575 iscsi_release_param_list(param_list); 576 return -ENOMEM; 577 } 578 579 static void iscsi_release_extra_responses(struct iscsi_param_list *param_list) 580 { 581 struct iscsi_extra_response *er, *er_tmp; 582 583 list_for_each_entry_safe(er, er_tmp, ¶m_list->extra_response_list, 584 er_list) { 585 list_del(&er->er_list); 586 kfree(er); 587 } 588 } 589 590 void iscsi_release_param_list(struct iscsi_param_list *param_list) 591 { 592 struct iscsi_param *param, *param_tmp; 593 594 list_for_each_entry_safe(param, param_tmp, ¶m_list->param_list, 595 p_list) { 596 list_del(¶m->p_list); 597 598 kfree(param->name); 599 kfree(param->value); 600 kfree(param); 601 } 602 603 iscsi_release_extra_responses(param_list); 604 605 kfree(param_list); 606 } 607 608 struct iscsi_param *iscsi_find_param_from_key( 609 char *key, 610 struct iscsi_param_list *param_list) 611 { 612 struct iscsi_param *param; 613 614 if (!key || !param_list) { 615 pr_err("Key or parameter list pointer is NULL.\n"); 616 return NULL; 617 } 618 619 list_for_each_entry(param, ¶m_list->param_list, p_list) { 620 if (!strcmp(key, param->name)) 621 return param; 622 } 623 624 pr_err("Unable to locate key \"%s\".\n", key); 625 return NULL; 626 } 627 EXPORT_SYMBOL(iscsi_find_param_from_key); 628 629 int iscsi_extract_key_value(char *textbuf, char **key, char **value) 630 { 631 *value = strchr(textbuf, '='); 632 if (!*value) { 633 pr_err("Unable to locate \"=\" separator for key," 634 " ignoring request.\n"); 635 return -1; 636 } 637 638 *key = textbuf; 639 **value = '\0'; 640 *value = *value + 1; 641 642 return 0; 643 } 644 645 int iscsi_update_param_value(struct iscsi_param *param, char *value) 646 { 647 kfree(param->value); 648 649 param->value = kstrdup(value, GFP_KERNEL); 650 if (!param->value) { 651 pr_err("Unable to allocate memory for value.\n"); 652 return -ENOMEM; 653 } 654 655 pr_debug("iSCSI Parameter updated to %s=%s\n", 656 param->name, param->value); 657 return 0; 658 } 659 660 static int iscsi_add_notunderstood_response( 661 char *key, 662 char *value, 663 struct iscsi_param_list *param_list) 664 { 665 struct iscsi_extra_response *extra_response; 666 667 if (strlen(value) > VALUE_MAXLEN) { 668 pr_err("Value for notunderstood key \"%s\" exceeds %d," 669 " protocol error.\n", key, VALUE_MAXLEN); 670 return -1; 671 } 672 673 extra_response = kzalloc(sizeof(struct iscsi_extra_response), GFP_KERNEL); 674 if (!extra_response) { 675 pr_err("Unable to allocate memory for" 676 " struct iscsi_extra_response.\n"); 677 return -ENOMEM; 678 } 679 INIT_LIST_HEAD(&extra_response->er_list); 680 681 strscpy(extra_response->key, key, sizeof(extra_response->key)); 682 strscpy(extra_response->value, NOTUNDERSTOOD, 683 sizeof(extra_response->value)); 684 685 list_add_tail(&extra_response->er_list, 686 ¶m_list->extra_response_list); 687 return 0; 688 } 689 690 static int iscsi_check_for_auth_key(char *key) 691 { 692 /* 693 * RFC 1994 694 */ 695 if (!strcmp(key, "CHAP_A") || !strcmp(key, "CHAP_I") || 696 !strcmp(key, "CHAP_C") || !strcmp(key, "CHAP_N") || 697 !strcmp(key, "CHAP_R")) 698 return 1; 699 700 /* 701 * RFC 2945 702 */ 703 if (!strcmp(key, "SRP_U") || !strcmp(key, "SRP_N") || 704 !strcmp(key, "SRP_g") || !strcmp(key, "SRP_s") || 705 !strcmp(key, "SRP_A") || !strcmp(key, "SRP_B") || 706 !strcmp(key, "SRP_M") || !strcmp(key, "SRP_HM")) 707 return 1; 708 709 return 0; 710 } 711 712 static void iscsi_check_proposer_for_optional_reply(struct iscsi_param *param, 713 bool keys_workaround) 714 { 715 if (IS_TYPE_BOOL_AND(param)) { 716 if (!strcmp(param->value, NO)) 717 SET_PSTATE_REPLY_OPTIONAL(param); 718 } else if (IS_TYPE_BOOL_OR(param)) { 719 if (!strcmp(param->value, YES)) 720 SET_PSTATE_REPLY_OPTIONAL(param); 721 722 if (keys_workaround) { 723 /* 724 * Required for gPXE iSCSI boot client 725 */ 726 if (!strcmp(param->name, IMMEDIATEDATA)) 727 SET_PSTATE_REPLY_OPTIONAL(param); 728 } 729 } else if (IS_TYPE_NUMBER(param)) { 730 if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) 731 SET_PSTATE_REPLY_OPTIONAL(param); 732 733 if (keys_workaround) { 734 /* 735 * Required for Mellanox Flexboot PXE boot ROM 736 */ 737 if (!strcmp(param->name, FIRSTBURSTLENGTH)) 738 SET_PSTATE_REPLY_OPTIONAL(param); 739 740 /* 741 * Required for gPXE iSCSI boot client 742 */ 743 if (!strcmp(param->name, MAXCONNECTIONS)) 744 SET_PSTATE_REPLY_OPTIONAL(param); 745 } 746 } else if (IS_PHASE_DECLARATIVE(param)) 747 SET_PSTATE_REPLY_OPTIONAL(param); 748 } 749 750 static int iscsi_check_boolean_value(struct iscsi_param *param, char *value) 751 { 752 if (strcmp(value, YES) && strcmp(value, NO)) { 753 pr_err("Illegal value for \"%s\", must be either" 754 " \"%s\" or \"%s\".\n", param->name, YES, NO); 755 return -1; 756 } 757 758 return 0; 759 } 760 761 static int iscsi_check_numerical_value(struct iscsi_param *param, char *value_ptr) 762 { 763 char *tmpptr; 764 int value = 0; 765 766 value = simple_strtoul(value_ptr, &tmpptr, 0); 767 768 if (IS_TYPERANGE_0_TO_2(param)) { 769 if ((value < 0) || (value > 2)) { 770 pr_err("Illegal value for \"%s\", must be" 771 " between 0 and 2.\n", param->name); 772 return -1; 773 } 774 return 0; 775 } 776 if (IS_TYPERANGE_0_TO_3600(param)) { 777 if ((value < 0) || (value > 3600)) { 778 pr_err("Illegal value for \"%s\", must be" 779 " between 0 and 3600.\n", param->name); 780 return -1; 781 } 782 return 0; 783 } 784 if (IS_TYPERANGE_0_TO_32767(param)) { 785 if ((value < 0) || (value > 32767)) { 786 pr_err("Illegal value for \"%s\", must be" 787 " between 0 and 32767.\n", param->name); 788 return -1; 789 } 790 return 0; 791 } 792 if (IS_TYPERANGE_0_TO_65535(param)) { 793 if ((value < 0) || (value > 65535)) { 794 pr_err("Illegal value for \"%s\", must be" 795 " between 0 and 65535.\n", param->name); 796 return -1; 797 } 798 return 0; 799 } 800 if (IS_TYPERANGE_1_TO_65535(param)) { 801 if ((value < 1) || (value > 65535)) { 802 pr_err("Illegal value for \"%s\", must be" 803 " between 1 and 65535.\n", param->name); 804 return -1; 805 } 806 return 0; 807 } 808 if (IS_TYPERANGE_2_TO_3600(param)) { 809 if ((value < 2) || (value > 3600)) { 810 pr_err("Illegal value for \"%s\", must be" 811 " between 2 and 3600.\n", param->name); 812 return -1; 813 } 814 return 0; 815 } 816 if (IS_TYPERANGE_512_TO_16777215(param)) { 817 if ((value < 512) || (value > 16777215)) { 818 pr_err("Illegal value for \"%s\", must be" 819 " between 512 and 16777215.\n", param->name); 820 return -1; 821 } 822 return 0; 823 } 824 825 return 0; 826 } 827 828 static int iscsi_check_string_or_list_value(struct iscsi_param *param, char *value) 829 { 830 if (IS_PSTATE_PROPOSER(param)) 831 return 0; 832 833 if (IS_TYPERANGE_AUTH_PARAM(param)) { 834 if (strcmp(value, KRB5) && strcmp(value, SPKM1) && 835 strcmp(value, SPKM2) && strcmp(value, SRP) && 836 strcmp(value, CHAP) && strcmp(value, NONE)) { 837 pr_err("Illegal value for \"%s\", must be" 838 " \"%s\", \"%s\", \"%s\", \"%s\", \"%s\"" 839 " or \"%s\".\n", param->name, KRB5, 840 SPKM1, SPKM2, SRP, CHAP, NONE); 841 return -1; 842 } 843 } 844 if (IS_TYPERANGE_DIGEST_PARAM(param)) { 845 if (strcmp(value, CRC32C) && strcmp(value, NONE)) { 846 pr_err("Illegal value for \"%s\", must be" 847 " \"%s\" or \"%s\".\n", param->name, 848 CRC32C, NONE); 849 return -1; 850 } 851 } 852 if (IS_TYPERANGE_SESSIONTYPE(param)) { 853 if (strcmp(value, DISCOVERY) && strcmp(value, NORMAL)) { 854 pr_err("Illegal value for \"%s\", must be" 855 " \"%s\" or \"%s\".\n", param->name, 856 DISCOVERY, NORMAL); 857 return -1; 858 } 859 } 860 861 return 0; 862 } 863 864 static char *iscsi_check_valuelist_for_support( 865 struct iscsi_param *param, 866 char *value) 867 { 868 char *tmp1 = NULL, *tmp2 = NULL; 869 char *acceptor_values = NULL, *proposer_values = NULL; 870 871 acceptor_values = param->value; 872 proposer_values = value; 873 874 do { 875 if (!proposer_values) 876 return NULL; 877 tmp1 = strchr(proposer_values, ','); 878 if (tmp1) 879 *tmp1 = '\0'; 880 acceptor_values = param->value; 881 do { 882 if (!acceptor_values) { 883 if (tmp1) 884 *tmp1 = ','; 885 return NULL; 886 } 887 tmp2 = strchr(acceptor_values, ','); 888 if (tmp2) 889 *tmp2 = '\0'; 890 if (!strcmp(acceptor_values, proposer_values)) { 891 if (tmp2) 892 *tmp2 = ','; 893 goto out; 894 } 895 if (tmp2) 896 *tmp2++ = ','; 897 898 acceptor_values = tmp2; 899 } while (acceptor_values); 900 if (tmp1) 901 *tmp1++ = ','; 902 proposer_values = tmp1; 903 } while (proposer_values); 904 905 out: 906 return proposer_values; 907 } 908 909 static int iscsi_check_acceptor_state(struct iscsi_param *param, char *value, 910 struct iscsit_conn *conn) 911 { 912 u8 acceptor_boolean_value = 0, proposer_boolean_value = 0; 913 char *negotiated_value = NULL; 914 915 if (IS_PSTATE_ACCEPTOR(param)) { 916 pr_err("Received key \"%s\" twice, protocol error.\n", 917 param->name); 918 return -1; 919 } 920 921 if (IS_PSTATE_REJECT(param)) 922 return 0; 923 924 if (IS_TYPE_BOOL_AND(param)) { 925 if (!strcmp(value, YES)) 926 proposer_boolean_value = 1; 927 if (!strcmp(param->value, YES)) 928 acceptor_boolean_value = 1; 929 if (acceptor_boolean_value && proposer_boolean_value) 930 do {} while (0); 931 else { 932 if (iscsi_update_param_value(param, NO) < 0) 933 return -1; 934 if (!proposer_boolean_value) 935 SET_PSTATE_REPLY_OPTIONAL(param); 936 } 937 } else if (IS_TYPE_BOOL_OR(param)) { 938 if (!strcmp(value, YES)) 939 proposer_boolean_value = 1; 940 if (!strcmp(param->value, YES)) 941 acceptor_boolean_value = 1; 942 if (acceptor_boolean_value || proposer_boolean_value) { 943 if (iscsi_update_param_value(param, YES) < 0) 944 return -1; 945 if (proposer_boolean_value) 946 SET_PSTATE_REPLY_OPTIONAL(param); 947 } 948 } else if (IS_TYPE_NUMBER(param)) { 949 char *tmpptr, buf[11]; 950 u32 acceptor_value = simple_strtoul(param->value, &tmpptr, 0); 951 u32 proposer_value = simple_strtoul(value, &tmpptr, 0); 952 953 memset(buf, 0, sizeof(buf)); 954 955 if (!strcmp(param->name, MAXCONNECTIONS) || 956 !strcmp(param->name, MAXBURSTLENGTH) || 957 !strcmp(param->name, FIRSTBURSTLENGTH) || 958 !strcmp(param->name, MAXOUTSTANDINGR2T) || 959 !strcmp(param->name, DEFAULTTIME2RETAIN) || 960 !strcmp(param->name, ERRORRECOVERYLEVEL)) { 961 if (proposer_value > acceptor_value) { 962 sprintf(buf, "%u", acceptor_value); 963 if (iscsi_update_param_value(param, 964 &buf[0]) < 0) 965 return -1; 966 } else { 967 if (iscsi_update_param_value(param, value) < 0) 968 return -1; 969 } 970 } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) { 971 if (acceptor_value > proposer_value) { 972 sprintf(buf, "%u", acceptor_value); 973 if (iscsi_update_param_value(param, 974 &buf[0]) < 0) 975 return -1; 976 } else { 977 if (iscsi_update_param_value(param, value) < 0) 978 return -1; 979 } 980 } else { 981 if (iscsi_update_param_value(param, value) < 0) 982 return -1; 983 } 984 985 if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) { 986 struct iscsi_param *param_mxdsl; 987 unsigned long long tmp; 988 int rc; 989 990 rc = kstrtoull(param->value, 0, &tmp); 991 if (rc < 0) 992 return -1; 993 994 conn->conn_ops->MaxRecvDataSegmentLength = tmp; 995 pr_debug("Saving op->MaxRecvDataSegmentLength from" 996 " original initiator received value: %u\n", 997 conn->conn_ops->MaxRecvDataSegmentLength); 998 999 param_mxdsl = iscsi_find_param_from_key( 1000 MAXXMITDATASEGMENTLENGTH, 1001 conn->param_list); 1002 if (!param_mxdsl) 1003 return -1; 1004 1005 rc = iscsi_update_param_value(param, 1006 param_mxdsl->value); 1007 if (rc < 0) 1008 return -1; 1009 1010 pr_debug("Updated %s to target MXDSL value: %s\n", 1011 param->name, param->value); 1012 } 1013 } else if (IS_TYPE_VALUE_LIST(param)) { 1014 negotiated_value = iscsi_check_valuelist_for_support( 1015 param, value); 1016 if (!negotiated_value) { 1017 pr_err("Proposer's value list \"%s\" contains" 1018 " no valid values from Acceptor's value list" 1019 " \"%s\".\n", value, param->value); 1020 return -1; 1021 } 1022 if (iscsi_update_param_value(param, negotiated_value) < 0) 1023 return -1; 1024 } else if (IS_PHASE_DECLARATIVE(param)) { 1025 if (iscsi_update_param_value(param, value) < 0) 1026 return -1; 1027 SET_PSTATE_REPLY_OPTIONAL(param); 1028 } 1029 1030 return 0; 1031 } 1032 1033 static int iscsi_check_proposer_state(struct iscsi_param *param, char *value) 1034 { 1035 if (IS_PSTATE_RESPONSE_GOT(param)) { 1036 pr_err("Received key \"%s\" twice, protocol error.\n", 1037 param->name); 1038 return -1; 1039 } 1040 1041 if (IS_TYPE_VALUE_LIST(param)) { 1042 char *comma_ptr = NULL, *tmp_ptr = NULL; 1043 1044 comma_ptr = strchr(value, ','); 1045 if (comma_ptr) { 1046 pr_err("Illegal \",\" in response for \"%s\".\n", 1047 param->name); 1048 return -1; 1049 } 1050 1051 tmp_ptr = iscsi_check_valuelist_for_support(param, value); 1052 if (!tmp_ptr) 1053 return -1; 1054 } 1055 1056 if (iscsi_update_param_value(param, value) < 0) 1057 return -1; 1058 1059 return 0; 1060 } 1061 1062 static int iscsi_check_value(struct iscsi_param *param, char *value) 1063 { 1064 char *comma_ptr = NULL; 1065 1066 if (!strcmp(value, REJECT)) { 1067 if (!strcmp(param->name, IFMARKINT) || 1068 !strcmp(param->name, OFMARKINT)) { 1069 /* 1070 * Reject is not fatal for [I,O]FMarkInt, and causes 1071 * [I,O]FMarker to be reset to No. (See iSCSI v20 A.3.2) 1072 */ 1073 SET_PSTATE_REJECT(param); 1074 return 0; 1075 } 1076 pr_err("Received %s=%s\n", param->name, value); 1077 return -1; 1078 } 1079 if (!strcmp(value, IRRELEVANT)) { 1080 pr_debug("Received %s=%s\n", param->name, value); 1081 SET_PSTATE_IRRELEVANT(param); 1082 return 0; 1083 } 1084 if (!strcmp(value, NOTUNDERSTOOD)) { 1085 if (!IS_PSTATE_PROPOSER(param)) { 1086 pr_err("Received illegal offer %s=%s\n", 1087 param->name, value); 1088 return -1; 1089 } 1090 1091 /* #warning FIXME: Add check for X-ExtensionKey here */ 1092 pr_err("Standard iSCSI key \"%s\" cannot be answered" 1093 " with \"%s\", protocol error.\n", param->name, value); 1094 return -1; 1095 } 1096 1097 do { 1098 comma_ptr = NULL; 1099 comma_ptr = strchr(value, ','); 1100 1101 if (comma_ptr && !IS_TYPE_VALUE_LIST(param)) { 1102 pr_err("Detected value separator \",\", but" 1103 " key \"%s\" does not allow a value list," 1104 " protocol error.\n", param->name); 1105 return -1; 1106 } 1107 if (comma_ptr) 1108 *comma_ptr = '\0'; 1109 1110 if (strlen(value) > VALUE_MAXLEN) { 1111 pr_err("Value for key \"%s\" exceeds %d," 1112 " protocol error.\n", param->name, 1113 VALUE_MAXLEN); 1114 return -1; 1115 } 1116 1117 if (IS_TYPE_BOOL_AND(param) || IS_TYPE_BOOL_OR(param)) { 1118 if (iscsi_check_boolean_value(param, value) < 0) 1119 return -1; 1120 } else if (IS_TYPE_NUMBER(param)) { 1121 if (iscsi_check_numerical_value(param, value) < 0) 1122 return -1; 1123 } else if (IS_TYPE_STRING(param) || IS_TYPE_VALUE_LIST(param)) { 1124 if (iscsi_check_string_or_list_value(param, value) < 0) 1125 return -1; 1126 } else { 1127 pr_err("Huh? 0x%02x\n", param->type); 1128 return -1; 1129 } 1130 1131 if (comma_ptr) 1132 *comma_ptr++ = ','; 1133 1134 value = comma_ptr; 1135 } while (value); 1136 1137 return 0; 1138 } 1139 1140 static struct iscsi_param *__iscsi_check_key( 1141 char *key, 1142 int sender, 1143 struct iscsi_param_list *param_list) 1144 { 1145 struct iscsi_param *param; 1146 1147 if (strlen(key) > KEY_MAXLEN) { 1148 pr_err("Length of key name \"%s\" exceeds %d.\n", 1149 key, KEY_MAXLEN); 1150 return NULL; 1151 } 1152 1153 param = iscsi_find_param_from_key(key, param_list); 1154 if (!param) 1155 return NULL; 1156 1157 if ((sender & SENDER_INITIATOR) && !IS_SENDER_INITIATOR(param)) { 1158 pr_err("Key \"%s\" may not be sent to %s," 1159 " protocol error.\n", param->name, 1160 (sender & SENDER_RECEIVER) ? "target" : "initiator"); 1161 return NULL; 1162 } 1163 1164 if ((sender & SENDER_TARGET) && !IS_SENDER_TARGET(param)) { 1165 pr_err("Key \"%s\" may not be sent to %s," 1166 " protocol error.\n", param->name, 1167 (sender & SENDER_RECEIVER) ? "initiator" : "target"); 1168 return NULL; 1169 } 1170 1171 return param; 1172 } 1173 1174 static struct iscsi_param *iscsi_check_key( 1175 char *key, 1176 int phase, 1177 int sender, 1178 struct iscsi_param_list *param_list) 1179 { 1180 struct iscsi_param *param; 1181 /* 1182 * Key name length must not exceed 63 bytes. (See iSCSI v20 5.1) 1183 */ 1184 if (strlen(key) > KEY_MAXLEN) { 1185 pr_err("Length of key name \"%s\" exceeds %d.\n", 1186 key, KEY_MAXLEN); 1187 return NULL; 1188 } 1189 1190 param = iscsi_find_param_from_key(key, param_list); 1191 if (!param) 1192 return NULL; 1193 1194 if ((sender & SENDER_INITIATOR) && !IS_SENDER_INITIATOR(param)) { 1195 pr_err("Key \"%s\" may not be sent to %s," 1196 " protocol error.\n", param->name, 1197 (sender & SENDER_RECEIVER) ? "target" : "initiator"); 1198 return NULL; 1199 } 1200 if ((sender & SENDER_TARGET) && !IS_SENDER_TARGET(param)) { 1201 pr_err("Key \"%s\" may not be sent to %s," 1202 " protocol error.\n", param->name, 1203 (sender & SENDER_RECEIVER) ? "initiator" : "target"); 1204 return NULL; 1205 } 1206 1207 if (IS_PSTATE_ACCEPTOR(param)) { 1208 pr_err("Key \"%s\" received twice, protocol error.\n", 1209 key); 1210 return NULL; 1211 } 1212 1213 if (!phase) 1214 return param; 1215 1216 if (!(param->phase & phase)) { 1217 char *phase_name; 1218 1219 switch (phase) { 1220 case PHASE_SECURITY: 1221 phase_name = "Security"; 1222 break; 1223 case PHASE_OPERATIONAL: 1224 phase_name = "Operational"; 1225 break; 1226 default: 1227 phase_name = "Unknown"; 1228 } 1229 pr_err("Key \"%s\" may not be negotiated during %s phase.\n", 1230 param->name, phase_name); 1231 return NULL; 1232 } 1233 1234 return param; 1235 } 1236 1237 static int iscsi_enforce_integrity_rules( 1238 u8 phase, 1239 struct iscsi_param_list *param_list) 1240 { 1241 char *tmpptr; 1242 u8 DataSequenceInOrder = 0; 1243 u8 ErrorRecoveryLevel = 0, SessionType = 0; 1244 u32 FirstBurstLength = 0, MaxBurstLength = 0; 1245 struct iscsi_param *param = NULL; 1246 1247 list_for_each_entry(param, ¶m_list->param_list, p_list) { 1248 if (!(param->phase & phase)) 1249 continue; 1250 if (!strcmp(param->name, SESSIONTYPE)) 1251 if (!strcmp(param->value, NORMAL)) 1252 SessionType = 1; 1253 if (!strcmp(param->name, ERRORRECOVERYLEVEL)) 1254 ErrorRecoveryLevel = simple_strtoul(param->value, 1255 &tmpptr, 0); 1256 if (!strcmp(param->name, DATASEQUENCEINORDER)) 1257 if (!strcmp(param->value, YES)) 1258 DataSequenceInOrder = 1; 1259 if (!strcmp(param->name, MAXBURSTLENGTH)) 1260 MaxBurstLength = simple_strtoul(param->value, 1261 &tmpptr, 0); 1262 } 1263 1264 list_for_each_entry(param, ¶m_list->param_list, p_list) { 1265 if (!(param->phase & phase)) 1266 continue; 1267 if (!SessionType && !IS_PSTATE_ACCEPTOR(param)) 1268 continue; 1269 if (!strcmp(param->name, MAXOUTSTANDINGR2T) && 1270 DataSequenceInOrder && (ErrorRecoveryLevel > 0)) { 1271 if (strcmp(param->value, "1")) { 1272 if (iscsi_update_param_value(param, "1") < 0) 1273 return -1; 1274 pr_debug("Reset \"%s\" to \"%s\".\n", 1275 param->name, param->value); 1276 } 1277 } 1278 if (!strcmp(param->name, MAXCONNECTIONS) && !SessionType) { 1279 if (strcmp(param->value, "1")) { 1280 if (iscsi_update_param_value(param, "1") < 0) 1281 return -1; 1282 pr_debug("Reset \"%s\" to \"%s\".\n", 1283 param->name, param->value); 1284 } 1285 } 1286 if (!strcmp(param->name, FIRSTBURSTLENGTH)) { 1287 FirstBurstLength = simple_strtoul(param->value, 1288 &tmpptr, 0); 1289 if (FirstBurstLength > MaxBurstLength) { 1290 char tmpbuf[11]; 1291 memset(tmpbuf, 0, sizeof(tmpbuf)); 1292 sprintf(tmpbuf, "%u", MaxBurstLength); 1293 if (iscsi_update_param_value(param, tmpbuf)) 1294 return -1; 1295 pr_debug("Reset \"%s\" to \"%s\".\n", 1296 param->name, param->value); 1297 } 1298 } 1299 } 1300 1301 return 0; 1302 } 1303 1304 int iscsi_decode_text_input( 1305 u8 phase, 1306 u8 sender, 1307 char *textbuf, 1308 u32 length, 1309 struct iscsit_conn *conn) 1310 { 1311 struct iscsi_param_list *param_list = conn->param_list; 1312 char *tmpbuf, *start = NULL, *end = NULL; 1313 1314 tmpbuf = kmemdup_nul(textbuf, length, GFP_KERNEL); 1315 if (!tmpbuf) { 1316 pr_err("Unable to allocate %u + 1 bytes for tmpbuf.\n", length); 1317 return -ENOMEM; 1318 } 1319 1320 start = tmpbuf; 1321 end = (start + length); 1322 1323 while (start < end) { 1324 char *key, *value; 1325 struct iscsi_param *param; 1326 1327 if (iscsi_extract_key_value(start, &key, &value) < 0) 1328 goto free_buffer; 1329 1330 pr_debug("Got key: %s=%s\n", key, value); 1331 1332 if (phase & PHASE_SECURITY) { 1333 if (iscsi_check_for_auth_key(key) > 0) { 1334 kfree(tmpbuf); 1335 return 1; 1336 } 1337 } 1338 1339 param = iscsi_check_key(key, phase, sender, param_list); 1340 if (!param) { 1341 if (iscsi_add_notunderstood_response(key, value, 1342 param_list) < 0) 1343 goto free_buffer; 1344 1345 start += strlen(key) + strlen(value) + 2; 1346 continue; 1347 } 1348 if (iscsi_check_value(param, value) < 0) 1349 goto free_buffer; 1350 1351 start += strlen(key) + strlen(value) + 2; 1352 1353 if (IS_PSTATE_PROPOSER(param)) { 1354 if (iscsi_check_proposer_state(param, value) < 0) 1355 goto free_buffer; 1356 1357 SET_PSTATE_RESPONSE_GOT(param); 1358 } else { 1359 if (iscsi_check_acceptor_state(param, value, conn) < 0) 1360 goto free_buffer; 1361 1362 SET_PSTATE_ACCEPTOR(param); 1363 } 1364 } 1365 1366 kfree(tmpbuf); 1367 return 0; 1368 1369 free_buffer: 1370 kfree(tmpbuf); 1371 return -1; 1372 } 1373 1374 int iscsi_encode_text_output( 1375 u8 phase, 1376 u8 sender, 1377 char *textbuf, 1378 u32 *length, 1379 struct iscsi_param_list *param_list, 1380 bool keys_workaround) 1381 { 1382 char *output_buf = NULL; 1383 struct iscsi_extra_response *er; 1384 struct iscsi_param *param; 1385 1386 output_buf = textbuf + *length; 1387 1388 if (iscsi_enforce_integrity_rules(phase, param_list) < 0) 1389 return -1; 1390 1391 list_for_each_entry(param, ¶m_list->param_list, p_list) { 1392 if (!(param->sender & sender)) 1393 continue; 1394 if (IS_PSTATE_ACCEPTOR(param) && 1395 !IS_PSTATE_RESPONSE_SENT(param) && 1396 !IS_PSTATE_REPLY_OPTIONAL(param) && 1397 (param->phase & phase)) { 1398 *length += sprintf(output_buf, "%s=%s", 1399 param->name, param->value); 1400 *length += 1; 1401 output_buf = textbuf + *length; 1402 SET_PSTATE_RESPONSE_SENT(param); 1403 pr_debug("Sending key: %s=%s\n", 1404 param->name, param->value); 1405 continue; 1406 } 1407 if (IS_PSTATE_NEGOTIATE(param) && 1408 !IS_PSTATE_ACCEPTOR(param) && 1409 !IS_PSTATE_PROPOSER(param) && 1410 (param->phase & phase)) { 1411 *length += sprintf(output_buf, "%s=%s", 1412 param->name, param->value); 1413 *length += 1; 1414 output_buf = textbuf + *length; 1415 SET_PSTATE_PROPOSER(param); 1416 iscsi_check_proposer_for_optional_reply(param, 1417 keys_workaround); 1418 pr_debug("Sending key: %s=%s\n", 1419 param->name, param->value); 1420 } 1421 } 1422 1423 list_for_each_entry(er, ¶m_list->extra_response_list, er_list) { 1424 *length += sprintf(output_buf, "%s=%s", er->key, er->value); 1425 *length += 1; 1426 output_buf = textbuf + *length; 1427 pr_debug("Sending key: %s=%s\n", er->key, er->value); 1428 } 1429 iscsi_release_extra_responses(param_list); 1430 1431 return 0; 1432 } 1433 1434 int iscsi_check_negotiated_keys(struct iscsi_param_list *param_list) 1435 { 1436 int ret = 0; 1437 struct iscsi_param *param; 1438 1439 list_for_each_entry(param, ¶m_list->param_list, p_list) { 1440 if (IS_PSTATE_NEGOTIATE(param) && 1441 IS_PSTATE_PROPOSER(param) && 1442 !IS_PSTATE_RESPONSE_GOT(param) && 1443 !IS_PSTATE_REPLY_OPTIONAL(param) && 1444 !IS_PHASE_DECLARATIVE(param)) { 1445 pr_err("No response for proposed key \"%s\".\n", 1446 param->name); 1447 ret = -1; 1448 } 1449 } 1450 1451 return ret; 1452 } 1453 1454 int iscsi_change_param_value( 1455 char *keyvalue, 1456 struct iscsi_param_list *param_list, 1457 int check_key) 1458 { 1459 char *key = NULL, *value = NULL; 1460 struct iscsi_param *param; 1461 int sender = 0; 1462 1463 if (iscsi_extract_key_value(keyvalue, &key, &value) < 0) 1464 return -1; 1465 1466 if (!check_key) { 1467 param = __iscsi_check_key(keyvalue, sender, param_list); 1468 if (!param) 1469 return -1; 1470 } else { 1471 param = iscsi_check_key(keyvalue, 0, sender, param_list); 1472 if (!param) 1473 return -1; 1474 1475 param->set_param = 1; 1476 if (iscsi_check_value(param, value) < 0) { 1477 param->set_param = 0; 1478 return -1; 1479 } 1480 param->set_param = 0; 1481 } 1482 1483 if (iscsi_update_param_value(param, value) < 0) 1484 return -1; 1485 1486 return 0; 1487 } 1488 1489 void iscsi_set_connection_parameters( 1490 struct iscsi_conn_ops *ops, 1491 struct iscsi_param_list *param_list) 1492 { 1493 char *tmpptr; 1494 struct iscsi_param *param; 1495 1496 pr_debug("---------------------------------------------------" 1497 "---------------\n"); 1498 list_for_each_entry(param, ¶m_list->param_list, p_list) { 1499 /* 1500 * Special case to set MAXXMITDATASEGMENTLENGTH from the 1501 * target requested MaxRecvDataSegmentLength, even though 1502 * this key is not sent over the wire. 1503 */ 1504 if (!strcmp(param->name, MAXXMITDATASEGMENTLENGTH)) { 1505 ops->MaxXmitDataSegmentLength = 1506 simple_strtoul(param->value, &tmpptr, 0); 1507 pr_debug("MaxXmitDataSegmentLength: %s\n", 1508 param->value); 1509 } 1510 1511 if (!IS_PSTATE_ACCEPTOR(param) && !IS_PSTATE_PROPOSER(param)) 1512 continue; 1513 if (!strcmp(param->name, AUTHMETHOD)) { 1514 pr_debug("AuthMethod: %s\n", 1515 param->value); 1516 } else if (!strcmp(param->name, HEADERDIGEST)) { 1517 ops->HeaderDigest = !strcmp(param->value, CRC32C); 1518 pr_debug("HeaderDigest: %s\n", 1519 param->value); 1520 } else if (!strcmp(param->name, DATADIGEST)) { 1521 ops->DataDigest = !strcmp(param->value, CRC32C); 1522 pr_debug("DataDigest: %s\n", 1523 param->value); 1524 } else if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) { 1525 /* 1526 * At this point iscsi_check_acceptor_state() will have 1527 * set ops->MaxRecvDataSegmentLength from the original 1528 * initiator provided value. 1529 */ 1530 pr_debug("MaxRecvDataSegmentLength: %u\n", 1531 ops->MaxRecvDataSegmentLength); 1532 } else if (!strcmp(param->name, INITIATORRECVDATASEGMENTLENGTH)) { 1533 ops->InitiatorRecvDataSegmentLength = 1534 simple_strtoul(param->value, &tmpptr, 0); 1535 pr_debug("InitiatorRecvDataSegmentLength: %s\n", 1536 param->value); 1537 ops->MaxRecvDataSegmentLength = 1538 ops->InitiatorRecvDataSegmentLength; 1539 pr_debug("Set MRDSL from InitiatorRecvDataSegmentLength\n"); 1540 } else if (!strcmp(param->name, TARGETRECVDATASEGMENTLENGTH)) { 1541 ops->TargetRecvDataSegmentLength = 1542 simple_strtoul(param->value, &tmpptr, 0); 1543 pr_debug("TargetRecvDataSegmentLength: %s\n", 1544 param->value); 1545 ops->MaxXmitDataSegmentLength = 1546 ops->TargetRecvDataSegmentLength; 1547 pr_debug("Set MXDSL from TargetRecvDataSegmentLength\n"); 1548 } 1549 } 1550 pr_debug("----------------------------------------------------" 1551 "--------------\n"); 1552 } 1553 1554 void iscsi_set_session_parameters( 1555 struct iscsi_sess_ops *ops, 1556 struct iscsi_param_list *param_list, 1557 int leading) 1558 { 1559 char *tmpptr; 1560 struct iscsi_param *param; 1561 1562 pr_debug("----------------------------------------------------" 1563 "--------------\n"); 1564 list_for_each_entry(param, ¶m_list->param_list, p_list) { 1565 if (!IS_PSTATE_ACCEPTOR(param) && !IS_PSTATE_PROPOSER(param)) 1566 continue; 1567 if (!strcmp(param->name, INITIATORNAME)) { 1568 if (!param->value) 1569 continue; 1570 if (leading) 1571 snprintf(ops->InitiatorName, 1572 sizeof(ops->InitiatorName), 1573 "%s", param->value); 1574 pr_debug("InitiatorName: %s\n", 1575 param->value); 1576 } else if (!strcmp(param->name, INITIATORALIAS)) { 1577 if (!param->value) 1578 continue; 1579 snprintf(ops->InitiatorAlias, 1580 sizeof(ops->InitiatorAlias), 1581 "%s", param->value); 1582 pr_debug("InitiatorAlias: %s\n", 1583 param->value); 1584 } else if (!strcmp(param->name, TARGETNAME)) { 1585 if (!param->value) 1586 continue; 1587 if (leading) 1588 snprintf(ops->TargetName, 1589 sizeof(ops->TargetName), 1590 "%s", param->value); 1591 pr_debug("TargetName: %s\n", 1592 param->value); 1593 } else if (!strcmp(param->name, TARGETALIAS)) { 1594 if (!param->value) 1595 continue; 1596 snprintf(ops->TargetAlias, sizeof(ops->TargetAlias), 1597 "%s", param->value); 1598 pr_debug("TargetAlias: %s\n", 1599 param->value); 1600 } else if (!strcmp(param->name, TARGETPORTALGROUPTAG)) { 1601 ops->TargetPortalGroupTag = 1602 simple_strtoul(param->value, &tmpptr, 0); 1603 pr_debug("TargetPortalGroupTag: %s\n", 1604 param->value); 1605 } else if (!strcmp(param->name, MAXCONNECTIONS)) { 1606 ops->MaxConnections = 1607 simple_strtoul(param->value, &tmpptr, 0); 1608 pr_debug("MaxConnections: %s\n", 1609 param->value); 1610 } else if (!strcmp(param->name, INITIALR2T)) { 1611 ops->InitialR2T = !strcmp(param->value, YES); 1612 pr_debug("InitialR2T: %s\n", 1613 param->value); 1614 } else if (!strcmp(param->name, IMMEDIATEDATA)) { 1615 ops->ImmediateData = !strcmp(param->value, YES); 1616 pr_debug("ImmediateData: %s\n", 1617 param->value); 1618 } else if (!strcmp(param->name, MAXBURSTLENGTH)) { 1619 ops->MaxBurstLength = 1620 simple_strtoul(param->value, &tmpptr, 0); 1621 pr_debug("MaxBurstLength: %s\n", 1622 param->value); 1623 } else if (!strcmp(param->name, FIRSTBURSTLENGTH)) { 1624 ops->FirstBurstLength = 1625 simple_strtoul(param->value, &tmpptr, 0); 1626 pr_debug("FirstBurstLength: %s\n", 1627 param->value); 1628 } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) { 1629 ops->DefaultTime2Wait = 1630 simple_strtoul(param->value, &tmpptr, 0); 1631 pr_debug("DefaultTime2Wait: %s\n", 1632 param->value); 1633 } else if (!strcmp(param->name, DEFAULTTIME2RETAIN)) { 1634 ops->DefaultTime2Retain = 1635 simple_strtoul(param->value, &tmpptr, 0); 1636 pr_debug("DefaultTime2Retain: %s\n", 1637 param->value); 1638 } else if (!strcmp(param->name, MAXOUTSTANDINGR2T)) { 1639 ops->MaxOutstandingR2T = 1640 simple_strtoul(param->value, &tmpptr, 0); 1641 pr_debug("MaxOutstandingR2T: %s\n", 1642 param->value); 1643 } else if (!strcmp(param->name, DATAPDUINORDER)) { 1644 ops->DataPDUInOrder = !strcmp(param->value, YES); 1645 pr_debug("DataPDUInOrder: %s\n", 1646 param->value); 1647 } else if (!strcmp(param->name, DATASEQUENCEINORDER)) { 1648 ops->DataSequenceInOrder = !strcmp(param->value, YES); 1649 pr_debug("DataSequenceInOrder: %s\n", 1650 param->value); 1651 } else if (!strcmp(param->name, ERRORRECOVERYLEVEL)) { 1652 ops->ErrorRecoveryLevel = 1653 simple_strtoul(param->value, &tmpptr, 0); 1654 pr_debug("ErrorRecoveryLevel: %s\n", 1655 param->value); 1656 } else if (!strcmp(param->name, SESSIONTYPE)) { 1657 ops->SessionType = !strcmp(param->value, DISCOVERY); 1658 pr_debug("SessionType: %s\n", 1659 param->value); 1660 } else if (!strcmp(param->name, RDMAEXTENSIONS)) { 1661 ops->RDMAExtensions = !strcmp(param->value, YES); 1662 pr_debug("RDMAExtensions: %s\n", 1663 param->value); 1664 } 1665 } 1666 pr_debug("----------------------------------------------------" 1667 "--------------\n"); 1668 1669 } 1670