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