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1// SPDX-License-Identifier: GPL-2.0-or-later2/*******************************************************************************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 17int 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 39int 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 70void iscsi_dump_conn_ops(struct iscsi_conn_ops *conn_ops)71{72 pr_debug("HeaderDigest: %s\n", (conn_ops->HeaderDigest) ?73 "CRC32C" : "None");74 pr_debug("DataDigest: %s\n", (conn_ops->DataDigest) ?75 "CRC32C" : "None");76 pr_debug("MaxRecvDataSegmentLength: %u\n",77 conn_ops->MaxRecvDataSegmentLength);78}79 80void iscsi_dump_sess_ops(struct iscsi_sess_ops *sess_ops)81{82 pr_debug("InitiatorName: %s\n", sess_ops->InitiatorName);83 pr_debug("InitiatorAlias: %s\n", sess_ops->InitiatorAlias);84 pr_debug("TargetName: %s\n", sess_ops->TargetName);85 pr_debug("TargetAlias: %s\n", sess_ops->TargetAlias);86 pr_debug("TargetPortalGroupTag: %hu\n",87 sess_ops->TargetPortalGroupTag);88 pr_debug("MaxConnections: %hu\n", sess_ops->MaxConnections);89 pr_debug("InitialR2T: %s\n",90 (sess_ops->InitialR2T) ? "Yes" : "No");91 pr_debug("ImmediateData: %s\n", (sess_ops->ImmediateData) ?92 "Yes" : "No");93 pr_debug("MaxBurstLength: %u\n", sess_ops->MaxBurstLength);94 pr_debug("FirstBurstLength: %u\n", sess_ops->FirstBurstLength);95 pr_debug("DefaultTime2Wait: %hu\n", sess_ops->DefaultTime2Wait);96 pr_debug("DefaultTime2Retain: %hu\n",97 sess_ops->DefaultTime2Retain);98 pr_debug("MaxOutstandingR2T: %hu\n",99 sess_ops->MaxOutstandingR2T);100 pr_debug("DataPDUInOrder: %s\n",101 (sess_ops->DataPDUInOrder) ? "Yes" : "No");102 pr_debug("DataSequenceInOrder: %s\n",103 (sess_ops->DataSequenceInOrder) ? "Yes" : "No");104 pr_debug("ErrorRecoveryLevel: %hu\n",105 sess_ops->ErrorRecoveryLevel);106 pr_debug("SessionType: %s\n", (sess_ops->SessionType) ?107 "Discovery" : "Normal");108}109 110void iscsi_print_params(struct iscsi_param_list *param_list)111{112 struct iscsi_param *param;113 114 list_for_each_entry(param, ¶m_list->param_list, p_list)115 pr_debug("%s: %s\n", param->name, param->value);116}117 118static struct iscsi_param *iscsi_set_default_param(struct iscsi_param_list *param_list,119 char *name, char *value, u8 phase, u8 scope, u8 sender,120 u16 type_range, u8 use)121{122 struct iscsi_param *param = NULL;123 124 param = kzalloc(sizeof(struct iscsi_param), GFP_KERNEL);125 if (!param) {126 pr_err("Unable to allocate memory for parameter.\n");127 goto out;128 }129 INIT_LIST_HEAD(¶m->p_list);130 131 param->name = kstrdup(name, GFP_KERNEL);132 if (!param->name) {133 pr_err("Unable to allocate memory for parameter name.\n");134 goto out;135 }136 137 param->value = kstrdup(value, GFP_KERNEL);138 if (!param->value) {139 pr_err("Unable to allocate memory for parameter value.\n");140 goto out;141 }142 143 param->phase = phase;144 param->scope = scope;145 param->sender = sender;146 param->use = use;147 param->type_range = type_range;148 149 switch (param->type_range) {150 case TYPERANGE_BOOL_AND:151 param->type = TYPE_BOOL_AND;152 break;153 case TYPERANGE_BOOL_OR:154 param->type = TYPE_BOOL_OR;155 break;156 case TYPERANGE_0_TO_2:157 case TYPERANGE_0_TO_3600:158 case TYPERANGE_0_TO_32767:159 case TYPERANGE_0_TO_65535:160 case TYPERANGE_1_TO_65535:161 case TYPERANGE_2_TO_3600:162 case TYPERANGE_512_TO_16777215:163 param->type = TYPE_NUMBER;164 break;165 case TYPERANGE_AUTH:166 case TYPERANGE_DIGEST:167 param->type = TYPE_VALUE_LIST | TYPE_STRING;168 break;169 case TYPERANGE_ISCSINAME:170 case TYPERANGE_SESSIONTYPE:171 case TYPERANGE_TARGETADDRESS:172 case TYPERANGE_UTF8:173 param->type = TYPE_STRING;174 break;175 default:176 pr_err("Unknown type_range 0x%02x\n",177 param->type_range);178 goto out;179 }180 list_add_tail(¶m->p_list, ¶m_list->param_list);181 182 return param;183out:184 if (param) {185 kfree(param->value);186 kfree(param->name);187 kfree(param);188 }189 190 return NULL;191}192 193/* #warning Add extension keys */194int iscsi_create_default_params(struct iscsi_param_list **param_list_ptr)195{196 struct iscsi_param *param = NULL;197 struct iscsi_param_list *pl;198 199 pl = kzalloc(sizeof(struct iscsi_param_list), GFP_KERNEL);200 if (!pl) {201 pr_err("Unable to allocate memory for"202 " struct iscsi_param_list.\n");203 return -ENOMEM;204 }205 INIT_LIST_HEAD(&pl->param_list);206 INIT_LIST_HEAD(&pl->extra_response_list);207 208 /*209 * The format for setting the initial parameter definitions are:210 *211 * Parameter name:212 * Initial value:213 * Allowable phase:214 * Scope:215 * Allowable senders:216 * Typerange:217 * Use:218 */219 param = iscsi_set_default_param(pl, AUTHMETHOD, INITIAL_AUTHMETHOD,220 PHASE_SECURITY, SCOPE_CONNECTION_ONLY, SENDER_BOTH,221 TYPERANGE_AUTH, USE_INITIAL_ONLY);222 if (!param)223 goto out;224 225 param = iscsi_set_default_param(pl, HEADERDIGEST, INITIAL_HEADERDIGEST,226 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,227 TYPERANGE_DIGEST, USE_INITIAL_ONLY);228 if (!param)229 goto out;230 231 param = iscsi_set_default_param(pl, DATADIGEST, INITIAL_DATADIGEST,232 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,233 TYPERANGE_DIGEST, USE_INITIAL_ONLY);234 if (!param)235 goto out;236 237 param = iscsi_set_default_param(pl, MAXCONNECTIONS,238 INITIAL_MAXCONNECTIONS, PHASE_OPERATIONAL,239 SCOPE_SESSION_WIDE, SENDER_BOTH,240 TYPERANGE_1_TO_65535, USE_LEADING_ONLY);241 if (!param)242 goto out;243 244 param = iscsi_set_default_param(pl, SENDTARGETS, INITIAL_SENDTARGETS,245 PHASE_FFP0, SCOPE_SESSION_WIDE, SENDER_INITIATOR,246 TYPERANGE_UTF8, 0);247 if (!param)248 goto out;249 250 param = iscsi_set_default_param(pl, TARGETNAME, INITIAL_TARGETNAME,251 PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_BOTH,252 TYPERANGE_ISCSINAME, USE_ALL);253 if (!param)254 goto out;255 256 param = iscsi_set_default_param(pl, INITIATORNAME,257 INITIAL_INITIATORNAME, PHASE_DECLARATIVE,258 SCOPE_SESSION_WIDE, SENDER_INITIATOR,259 TYPERANGE_ISCSINAME, USE_INITIAL_ONLY);260 if (!param)261 goto out;262 263 param = iscsi_set_default_param(pl, TARGETALIAS, INITIAL_TARGETALIAS,264 PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_TARGET,265 TYPERANGE_UTF8, USE_ALL);266 if (!param)267 goto out;268 269 param = iscsi_set_default_param(pl, INITIATORALIAS,270 INITIAL_INITIATORALIAS, PHASE_DECLARATIVE,271 SCOPE_SESSION_WIDE, SENDER_INITIATOR, TYPERANGE_UTF8,272 USE_ALL);273 if (!param)274 goto out;275 276 param = iscsi_set_default_param(pl, TARGETADDRESS,277 INITIAL_TARGETADDRESS, PHASE_DECLARATIVE,278 SCOPE_SESSION_WIDE, SENDER_TARGET,279 TYPERANGE_TARGETADDRESS, USE_ALL);280 if (!param)281 goto out;282 283 param = iscsi_set_default_param(pl, TARGETPORTALGROUPTAG,284 INITIAL_TARGETPORTALGROUPTAG,285 PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_TARGET,286 TYPERANGE_0_TO_65535, USE_INITIAL_ONLY);287 if (!param)288 goto out;289 290 param = iscsi_set_default_param(pl, INITIALR2T, INITIAL_INITIALR2T,291 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,292 TYPERANGE_BOOL_OR, USE_LEADING_ONLY);293 if (!param)294 goto out;295 296 param = iscsi_set_default_param(pl, IMMEDIATEDATA,297 INITIAL_IMMEDIATEDATA, PHASE_OPERATIONAL,298 SCOPE_SESSION_WIDE, SENDER_BOTH, TYPERANGE_BOOL_AND,299 USE_LEADING_ONLY);300 if (!param)301 goto out;302 303 param = iscsi_set_default_param(pl, MAXXMITDATASEGMENTLENGTH,304 INITIAL_MAXXMITDATASEGMENTLENGTH,305 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,306 TYPERANGE_512_TO_16777215, USE_ALL);307 if (!param)308 goto out;309 310 param = iscsi_set_default_param(pl, MAXRECVDATASEGMENTLENGTH,311 INITIAL_MAXRECVDATASEGMENTLENGTH,312 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,313 TYPERANGE_512_TO_16777215, USE_ALL);314 if (!param)315 goto out;316 317 param = iscsi_set_default_param(pl, MAXBURSTLENGTH,318 INITIAL_MAXBURSTLENGTH, PHASE_OPERATIONAL,319 SCOPE_SESSION_WIDE, SENDER_BOTH,320 TYPERANGE_512_TO_16777215, USE_LEADING_ONLY);321 if (!param)322 goto out;323 324 param = iscsi_set_default_param(pl, FIRSTBURSTLENGTH,325 INITIAL_FIRSTBURSTLENGTH,326 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,327 TYPERANGE_512_TO_16777215, USE_LEADING_ONLY);328 if (!param)329 goto out;330 331 param = iscsi_set_default_param(pl, DEFAULTTIME2WAIT,332 INITIAL_DEFAULTTIME2WAIT,333 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,334 TYPERANGE_0_TO_3600, USE_LEADING_ONLY);335 if (!param)336 goto out;337 338 param = iscsi_set_default_param(pl, DEFAULTTIME2RETAIN,339 INITIAL_DEFAULTTIME2RETAIN,340 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,341 TYPERANGE_0_TO_3600, USE_LEADING_ONLY);342 if (!param)343 goto out;344 345 param = iscsi_set_default_param(pl, MAXOUTSTANDINGR2T,346 INITIAL_MAXOUTSTANDINGR2T,347 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,348 TYPERANGE_1_TO_65535, USE_LEADING_ONLY);349 if (!param)350 goto out;351 352 param = iscsi_set_default_param(pl, DATAPDUINORDER,353 INITIAL_DATAPDUINORDER, PHASE_OPERATIONAL,354 SCOPE_SESSION_WIDE, SENDER_BOTH, TYPERANGE_BOOL_OR,355 USE_LEADING_ONLY);356 if (!param)357 goto out;358 359 param = iscsi_set_default_param(pl, DATASEQUENCEINORDER,360 INITIAL_DATASEQUENCEINORDER,361 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,362 TYPERANGE_BOOL_OR, USE_LEADING_ONLY);363 if (!param)364 goto out;365 366 param = iscsi_set_default_param(pl, ERRORRECOVERYLEVEL,367 INITIAL_ERRORRECOVERYLEVEL,368 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,369 TYPERANGE_0_TO_2, USE_LEADING_ONLY);370 if (!param)371 goto out;372 373 param = iscsi_set_default_param(pl, SESSIONTYPE, INITIAL_SESSIONTYPE,374 PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_INITIATOR,375 TYPERANGE_SESSIONTYPE, USE_LEADING_ONLY);376 if (!param)377 goto out;378 379 param = iscsi_set_default_param(pl, IFMARKER, INITIAL_IFMARKER,380 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,381 TYPERANGE_BOOL_AND, USE_INITIAL_ONLY);382 if (!param)383 goto out;384 385 param = iscsi_set_default_param(pl, OFMARKER, INITIAL_OFMARKER,386 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,387 TYPERANGE_BOOL_AND, USE_INITIAL_ONLY);388 if (!param)389 goto out;390 391 param = iscsi_set_default_param(pl, IFMARKINT, INITIAL_IFMARKINT,392 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,393 TYPERANGE_UTF8, USE_INITIAL_ONLY);394 if (!param)395 goto out;396 397 param = iscsi_set_default_param(pl, OFMARKINT, INITIAL_OFMARKINT,398 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,399 TYPERANGE_UTF8, USE_INITIAL_ONLY);400 if (!param)401 goto out;402 403 /*404 * Extra parameters for ISER from RFC-5046405 */406 param = iscsi_set_default_param(pl, RDMAEXTENSIONS, INITIAL_RDMAEXTENSIONS,407 PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,408 TYPERANGE_BOOL_AND, USE_LEADING_ONLY);409 if (!param)410 goto out;411 412 param = iscsi_set_default_param(pl, INITIATORRECVDATASEGMENTLENGTH,413 INITIAL_INITIATORRECVDATASEGMENTLENGTH,414 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,415 TYPERANGE_512_TO_16777215, USE_ALL);416 if (!param)417 goto out;418 419 param = iscsi_set_default_param(pl, TARGETRECVDATASEGMENTLENGTH,420 INITIAL_TARGETRECVDATASEGMENTLENGTH,421 PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,422 TYPERANGE_512_TO_16777215, USE_ALL);423 if (!param)424 goto out;425 426 *param_list_ptr = pl;427 return 0;428out:429 iscsi_release_param_list(pl);430 return -1;431}432 433int iscsi_set_keys_to_negotiate(434 struct iscsi_param_list *param_list,435 bool iser)436{437 struct iscsi_param *param;438 439 param_list->iser = iser;440 441 list_for_each_entry(param, ¶m_list->param_list, p_list) {442 param->state = 0;443 if (!strcmp(param->name, AUTHMETHOD)) {444 SET_PSTATE_NEGOTIATE(param);445 } else if (!strcmp(param->name, HEADERDIGEST)) {446 if (!iser)447 SET_PSTATE_NEGOTIATE(param);448 } else if (!strcmp(param->name, DATADIGEST)) {449 if (!iser)450 SET_PSTATE_NEGOTIATE(param);451 } else if (!strcmp(param->name, MAXCONNECTIONS)) {452 SET_PSTATE_NEGOTIATE(param);453 } else if (!strcmp(param->name, TARGETNAME)) {454 continue;455 } else if (!strcmp(param->name, INITIATORNAME)) {456 continue;457 } else if (!strcmp(param->name, TARGETALIAS)) {458 if (param->value)459 SET_PSTATE_NEGOTIATE(param);460 } else if (!strcmp(param->name, INITIATORALIAS)) {461 continue;462 } else if (!strcmp(param->name, TARGETPORTALGROUPTAG)) {463 SET_PSTATE_NEGOTIATE(param);464 } else if (!strcmp(param->name, INITIALR2T)) {465 SET_PSTATE_NEGOTIATE(param);466 } else if (!strcmp(param->name, IMMEDIATEDATA)) {467 SET_PSTATE_NEGOTIATE(param);468 } else if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) {469 if (!iser)470 SET_PSTATE_NEGOTIATE(param);471 } else if (!strcmp(param->name, MAXXMITDATASEGMENTLENGTH)) {472 continue;473 } else if (!strcmp(param->name, MAXBURSTLENGTH)) {474 SET_PSTATE_NEGOTIATE(param);475 } else if (!strcmp(param->name, FIRSTBURSTLENGTH)) {476 SET_PSTATE_NEGOTIATE(param);477 } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) {478 SET_PSTATE_NEGOTIATE(param);479 } else if (!strcmp(param->name, DEFAULTTIME2RETAIN)) {480 SET_PSTATE_NEGOTIATE(param);481 } else if (!strcmp(param->name, MAXOUTSTANDINGR2T)) {482 SET_PSTATE_NEGOTIATE(param);483 } else if (!strcmp(param->name, DATAPDUINORDER)) {484 SET_PSTATE_NEGOTIATE(param);485 } else if (!strcmp(param->name, DATASEQUENCEINORDER)) {486 SET_PSTATE_NEGOTIATE(param);487 } else if (!strcmp(param->name, ERRORRECOVERYLEVEL)) {488 SET_PSTATE_NEGOTIATE(param);489 } else if (!strcmp(param->name, SESSIONTYPE)) {490 SET_PSTATE_NEGOTIATE(param);491 } else if (!strcmp(param->name, IFMARKER)) {492 SET_PSTATE_REJECT(param);493 } else if (!strcmp(param->name, OFMARKER)) {494 SET_PSTATE_REJECT(param);495 } else if (!strcmp(param->name, IFMARKINT)) {496 SET_PSTATE_REJECT(param);497 } else if (!strcmp(param->name, OFMARKINT)) {498 SET_PSTATE_REJECT(param);499 } else if (!strcmp(param->name, RDMAEXTENSIONS)) {500 if (iser)501 SET_PSTATE_NEGOTIATE(param);502 } else if (!strcmp(param->name, INITIATORRECVDATASEGMENTLENGTH)) {503 if (iser)504 SET_PSTATE_NEGOTIATE(param);505 } else if (!strcmp(param->name, TARGETRECVDATASEGMENTLENGTH)) {506 if (iser)507 SET_PSTATE_NEGOTIATE(param);508 }509 }510 511 return 0;512}513 514int iscsi_set_keys_irrelevant_for_discovery(515 struct iscsi_param_list *param_list)516{517 struct iscsi_param *param;518 519 list_for_each_entry(param, ¶m_list->param_list, p_list) {520 if (!strcmp(param->name, MAXCONNECTIONS))521 param->state &= ~PSTATE_NEGOTIATE;522 else if (!strcmp(param->name, INITIALR2T))523 param->state &= ~PSTATE_NEGOTIATE;524 else if (!strcmp(param->name, IMMEDIATEDATA))525 param->state &= ~PSTATE_NEGOTIATE;526 else if (!strcmp(param->name, MAXBURSTLENGTH))527 param->state &= ~PSTATE_NEGOTIATE;528 else if (!strcmp(param->name, FIRSTBURSTLENGTH))529 param->state &= ~PSTATE_NEGOTIATE;530 else if (!strcmp(param->name, MAXOUTSTANDINGR2T))531 param->state &= ~PSTATE_NEGOTIATE;532 else if (!strcmp(param->name, DATAPDUINORDER))533 param->state &= ~PSTATE_NEGOTIATE;534 else if (!strcmp(param->name, DATASEQUENCEINORDER))535 param->state &= ~PSTATE_NEGOTIATE;536 else if (!strcmp(param->name, ERRORRECOVERYLEVEL))537 param->state &= ~PSTATE_NEGOTIATE;538 else if (!strcmp(param->name, DEFAULTTIME2WAIT))539 param->state &= ~PSTATE_NEGOTIATE;540 else if (!strcmp(param->name, DEFAULTTIME2RETAIN))541 param->state &= ~PSTATE_NEGOTIATE;542 else if (!strcmp(param->name, IFMARKER))543 param->state &= ~PSTATE_NEGOTIATE;544 else if (!strcmp(param->name, OFMARKER))545 param->state &= ~PSTATE_NEGOTIATE;546 else if (!strcmp(param->name, IFMARKINT))547 param->state &= ~PSTATE_NEGOTIATE;548 else if (!strcmp(param->name, OFMARKINT))549 param->state &= ~PSTATE_NEGOTIATE;550 else if (!strcmp(param->name, RDMAEXTENSIONS))551 param->state &= ~PSTATE_NEGOTIATE;552 else if (!strcmp(param->name, INITIATORRECVDATASEGMENTLENGTH))553 param->state &= ~PSTATE_NEGOTIATE;554 else if (!strcmp(param->name, TARGETRECVDATASEGMENTLENGTH))555 param->state &= ~PSTATE_NEGOTIATE;556 }557 558 return 0;559}560 561int iscsi_copy_param_list(562 struct iscsi_param_list **dst_param_list,563 struct iscsi_param_list *src_param_list,564 int leading)565{566 struct iscsi_param *param = NULL;567 struct iscsi_param *new_param = NULL;568 struct iscsi_param_list *param_list = NULL;569 570 param_list = kzalloc(sizeof(struct iscsi_param_list), GFP_KERNEL);571 if (!param_list) {572 pr_err("Unable to allocate memory for struct iscsi_param_list.\n");573 return -ENOMEM;574 }575 INIT_LIST_HEAD(¶m_list->param_list);576 INIT_LIST_HEAD(¶m_list->extra_response_list);577 578 list_for_each_entry(param, &src_param_list->param_list, p_list) {579 if (!leading && (param->scope & SCOPE_SESSION_WIDE)) {580 if ((strcmp(param->name, "TargetName") != 0) &&581 (strcmp(param->name, "InitiatorName") != 0) &&582 (strcmp(param->name, "TargetPortalGroupTag") != 0))583 continue;584 }585 586 new_param = kzalloc(sizeof(struct iscsi_param), GFP_KERNEL);587 if (!new_param) {588 pr_err("Unable to allocate memory for struct iscsi_param.\n");589 goto err_out;590 }591 592 new_param->name = kstrdup(param->name, GFP_KERNEL);593 new_param->value = kstrdup(param->value, GFP_KERNEL);594 if (!new_param->value || !new_param->name) {595 kfree(new_param->value);596 kfree(new_param->name);597 kfree(new_param);598 pr_err("Unable to allocate memory for parameter name/value.\n");599 goto err_out;600 }601 602 new_param->set_param = param->set_param;603 new_param->phase = param->phase;604 new_param->scope = param->scope;605 new_param->sender = param->sender;606 new_param->type = param->type;607 new_param->use = param->use;608 new_param->type_range = param->type_range;609 610 list_add_tail(&new_param->p_list, ¶m_list->param_list);611 }612 613 if (!list_empty(¶m_list->param_list)) {614 *dst_param_list = param_list;615 } else {616 pr_err("No parameters allocated.\n");617 goto err_out;618 }619 620 return 0;621 622err_out:623 iscsi_release_param_list(param_list);624 return -ENOMEM;625}626 627static void iscsi_release_extra_responses(struct iscsi_param_list *param_list)628{629 struct iscsi_extra_response *er, *er_tmp;630 631 list_for_each_entry_safe(er, er_tmp, ¶m_list->extra_response_list,632 er_list) {633 list_del(&er->er_list);634 kfree(er);635 }636}637 638void iscsi_release_param_list(struct iscsi_param_list *param_list)639{640 struct iscsi_param *param, *param_tmp;641 642 list_for_each_entry_safe(param, param_tmp, ¶m_list->param_list,643 p_list) {644 list_del(¶m->p_list);645 646 kfree(param->name);647 kfree(param->value);648 kfree(param);649 }650 651 iscsi_release_extra_responses(param_list);652 653 kfree(param_list);654}655 656struct iscsi_param *iscsi_find_param_from_key(657 char *key,658 struct iscsi_param_list *param_list)659{660 struct iscsi_param *param;661 662 if (!key || !param_list) {663 pr_err("Key or parameter list pointer is NULL.\n");664 return NULL;665 }666 667 list_for_each_entry(param, ¶m_list->param_list, p_list) {668 if (!strcmp(key, param->name))669 return param;670 }671 672 pr_err("Unable to locate key \"%s\".\n", key);673 return NULL;674}675EXPORT_SYMBOL(iscsi_find_param_from_key);676 677int iscsi_extract_key_value(char *textbuf, char **key, char **value)678{679 *value = strchr(textbuf, '=');680 if (!*value) {681 pr_err("Unable to locate \"=\" separator for key,"682 " ignoring request.\n");683 return -1;684 }685 686 *key = textbuf;687 **value = '\0';688 *value = *value + 1;689 690 return 0;691}692 693int iscsi_update_param_value(struct iscsi_param *param, char *value)694{695 kfree(param->value);696 697 param->value = kstrdup(value, GFP_KERNEL);698 if (!param->value) {699 pr_err("Unable to allocate memory for value.\n");700 return -ENOMEM;701 }702 703 pr_debug("iSCSI Parameter updated to %s=%s\n",704 param->name, param->value);705 return 0;706}707 708static int iscsi_add_notunderstood_response(709 char *key,710 char *value,711 struct iscsi_param_list *param_list)712{713 struct iscsi_extra_response *extra_response;714 715 if (strlen(value) > VALUE_MAXLEN) {716 pr_err("Value for notunderstood key \"%s\" exceeds %d,"717 " protocol error.\n", key, VALUE_MAXLEN);718 return -1;719 }720 721 extra_response = kzalloc(sizeof(struct iscsi_extra_response), GFP_KERNEL);722 if (!extra_response) {723 pr_err("Unable to allocate memory for"724 " struct iscsi_extra_response.\n");725 return -ENOMEM;726 }727 INIT_LIST_HEAD(&extra_response->er_list);728 729 strscpy(extra_response->key, key, sizeof(extra_response->key));730 strscpy(extra_response->value, NOTUNDERSTOOD,731 sizeof(extra_response->value));732 733 list_add_tail(&extra_response->er_list,734 ¶m_list->extra_response_list);735 return 0;736}737 738static int iscsi_check_for_auth_key(char *key)739{740 /*741 * RFC 1994742 */743 if (!strcmp(key, "CHAP_A") || !strcmp(key, "CHAP_I") ||744 !strcmp(key, "CHAP_C") || !strcmp(key, "CHAP_N") ||745 !strcmp(key, "CHAP_R"))746 return 1;747 748 /*749 * RFC 2945750 */751 if (!strcmp(key, "SRP_U") || !strcmp(key, "SRP_N") ||752 !strcmp(key, "SRP_g") || !strcmp(key, "SRP_s") ||753 !strcmp(key, "SRP_A") || !strcmp(key, "SRP_B") ||754 !strcmp(key, "SRP_M") || !strcmp(key, "SRP_HM"))755 return 1;756 757 return 0;758}759 760static void iscsi_check_proposer_for_optional_reply(struct iscsi_param *param,761 bool keys_workaround)762{763 if (IS_TYPE_BOOL_AND(param)) {764 if (!strcmp(param->value, NO))765 SET_PSTATE_REPLY_OPTIONAL(param);766 } else if (IS_TYPE_BOOL_OR(param)) {767 if (!strcmp(param->value, YES))768 SET_PSTATE_REPLY_OPTIONAL(param);769 770 if (keys_workaround) {771 /*772 * Required for gPXE iSCSI boot client773 */774 if (!strcmp(param->name, IMMEDIATEDATA))775 SET_PSTATE_REPLY_OPTIONAL(param);776 }777 } else if (IS_TYPE_NUMBER(param)) {778 if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH))779 SET_PSTATE_REPLY_OPTIONAL(param);780 781 if (keys_workaround) {782 /*783 * Required for Mellanox Flexboot PXE boot ROM784 */785 if (!strcmp(param->name, FIRSTBURSTLENGTH))786 SET_PSTATE_REPLY_OPTIONAL(param);787 788 /*789 * Required for gPXE iSCSI boot client790 */791 if (!strcmp(param->name, MAXCONNECTIONS))792 SET_PSTATE_REPLY_OPTIONAL(param);793 }794 } else if (IS_PHASE_DECLARATIVE(param))795 SET_PSTATE_REPLY_OPTIONAL(param);796}797 798static int iscsi_check_boolean_value(struct iscsi_param *param, char *value)799{800 if (strcmp(value, YES) && strcmp(value, NO)) {801 pr_err("Illegal value for \"%s\", must be either"802 " \"%s\" or \"%s\".\n", param->name, YES, NO);803 return -1;804 }805 806 return 0;807}808 809static int iscsi_check_numerical_value(struct iscsi_param *param, char *value_ptr)810{811 char *tmpptr;812 int value = 0;813 814 value = simple_strtoul(value_ptr, &tmpptr, 0);815 816 if (IS_TYPERANGE_0_TO_2(param)) {817 if ((value < 0) || (value > 2)) {818 pr_err("Illegal value for \"%s\", must be"819 " between 0 and 2.\n", param->name);820 return -1;821 }822 return 0;823 }824 if (IS_TYPERANGE_0_TO_3600(param)) {825 if ((value < 0) || (value > 3600)) {826 pr_err("Illegal value for \"%s\", must be"827 " between 0 and 3600.\n", param->name);828 return -1;829 }830 return 0;831 }832 if (IS_TYPERANGE_0_TO_32767(param)) {833 if ((value < 0) || (value > 32767)) {834 pr_err("Illegal value for \"%s\", must be"835 " between 0 and 32767.\n", param->name);836 return -1;837 }838 return 0;839 }840 if (IS_TYPERANGE_0_TO_65535(param)) {841 if ((value < 0) || (value > 65535)) {842 pr_err("Illegal value for \"%s\", must be"843 " between 0 and 65535.\n", param->name);844 return -1;845 }846 return 0;847 }848 if (IS_TYPERANGE_1_TO_65535(param)) {849 if ((value < 1) || (value > 65535)) {850 pr_err("Illegal value for \"%s\", must be"851 " between 1 and 65535.\n", param->name);852 return -1;853 }854 return 0;855 }856 if (IS_TYPERANGE_2_TO_3600(param)) {857 if ((value < 2) || (value > 3600)) {858 pr_err("Illegal value for \"%s\", must be"859 " between 2 and 3600.\n", param->name);860 return -1;861 }862 return 0;863 }864 if (IS_TYPERANGE_512_TO_16777215(param)) {865 if ((value < 512) || (value > 16777215)) {866 pr_err("Illegal value for \"%s\", must be"867 " between 512 and 16777215.\n", param->name);868 return -1;869 }870 return 0;871 }872 873 return 0;874}875 876static int iscsi_check_string_or_list_value(struct iscsi_param *param, char *value)877{878 if (IS_PSTATE_PROPOSER(param))879 return 0;880 881 if (IS_TYPERANGE_AUTH_PARAM(param)) {882 if (strcmp(value, KRB5) && strcmp(value, SPKM1) &&883 strcmp(value, SPKM2) && strcmp(value, SRP) &&884 strcmp(value, CHAP) && strcmp(value, NONE)) {885 pr_err("Illegal value for \"%s\", must be"886 " \"%s\", \"%s\", \"%s\", \"%s\", \"%s\""887 " or \"%s\".\n", param->name, KRB5,888 SPKM1, SPKM2, SRP, CHAP, NONE);889 return -1;890 }891 }892 if (IS_TYPERANGE_DIGEST_PARAM(param)) {893 if (strcmp(value, CRC32C) && strcmp(value, NONE)) {894 pr_err("Illegal value for \"%s\", must be"895 " \"%s\" or \"%s\".\n", param->name,896 CRC32C, NONE);897 return -1;898 }899 }900 if (IS_TYPERANGE_SESSIONTYPE(param)) {901 if (strcmp(value, DISCOVERY) && strcmp(value, NORMAL)) {902 pr_err("Illegal value for \"%s\", must be"903 " \"%s\" or \"%s\".\n", param->name,904 DISCOVERY, NORMAL);905 return -1;906 }907 }908 909 return 0;910}911 912static char *iscsi_check_valuelist_for_support(913 struct iscsi_param *param,914 char *value)915{916 char *tmp1 = NULL, *tmp2 = NULL;917 char *acceptor_values = NULL, *proposer_values = NULL;918 919 acceptor_values = param->value;920 proposer_values = value;921 922 do {923 if (!proposer_values)924 return NULL;925 tmp1 = strchr(proposer_values, ',');926 if (tmp1)927 *tmp1 = '\0';928 acceptor_values = param->value;929 do {930 if (!acceptor_values) {931 if (tmp1)932 *tmp1 = ',';933 return NULL;934 }935 tmp2 = strchr(acceptor_values, ',');936 if (tmp2)937 *tmp2 = '\0';938 if (!strcmp(acceptor_values, proposer_values)) {939 if (tmp2)940 *tmp2 = ',';941 goto out;942 }943 if (tmp2)944 *tmp2++ = ',';945 946 acceptor_values = tmp2;947 } while (acceptor_values);948 if (tmp1)949 *tmp1++ = ',';950 proposer_values = tmp1;951 } while (proposer_values);952 953out:954 return proposer_values;955}956 957static int iscsi_check_acceptor_state(struct iscsi_param *param, char *value,958 struct iscsit_conn *conn)959{960 u8 acceptor_boolean_value = 0, proposer_boolean_value = 0;961 char *negotiated_value = NULL;962 963 if (IS_PSTATE_ACCEPTOR(param)) {964 pr_err("Received key \"%s\" twice, protocol error.\n",965 param->name);966 return -1;967 }968 969 if (IS_PSTATE_REJECT(param))970 return 0;971 972 if (IS_TYPE_BOOL_AND(param)) {973 if (!strcmp(value, YES))974 proposer_boolean_value = 1;975 if (!strcmp(param->value, YES))976 acceptor_boolean_value = 1;977 if (acceptor_boolean_value && proposer_boolean_value)978 do {} while (0);979 else {980 if (iscsi_update_param_value(param, NO) < 0)981 return -1;982 if (!proposer_boolean_value)983 SET_PSTATE_REPLY_OPTIONAL(param);984 }985 } else if (IS_TYPE_BOOL_OR(param)) {986 if (!strcmp(value, YES))987 proposer_boolean_value = 1;988 if (!strcmp(param->value, YES))989 acceptor_boolean_value = 1;990 if (acceptor_boolean_value || proposer_boolean_value) {991 if (iscsi_update_param_value(param, YES) < 0)992 return -1;993 if (proposer_boolean_value)994 SET_PSTATE_REPLY_OPTIONAL(param);995 }996 } else if (IS_TYPE_NUMBER(param)) {997 char *tmpptr, buf[11];998 u32 acceptor_value = simple_strtoul(param->value, &tmpptr, 0);999 u32 proposer_value = simple_strtoul(value, &tmpptr, 0);1000 1001 memset(buf, 0, sizeof(buf));1002 1003 if (!strcmp(param->name, MAXCONNECTIONS) ||1004 !strcmp(param->name, MAXBURSTLENGTH) ||1005 !strcmp(param->name, FIRSTBURSTLENGTH) ||1006 !strcmp(param->name, MAXOUTSTANDINGR2T) ||1007 !strcmp(param->name, DEFAULTTIME2RETAIN) ||1008 !strcmp(param->name, ERRORRECOVERYLEVEL)) {1009 if (proposer_value > acceptor_value) {1010 sprintf(buf, "%u", acceptor_value);1011 if (iscsi_update_param_value(param,1012 &buf[0]) < 0)1013 return -1;1014 } else {1015 if (iscsi_update_param_value(param, value) < 0)1016 return -1;1017 }1018 } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) {1019 if (acceptor_value > proposer_value) {1020 sprintf(buf, "%u", acceptor_value);1021 if (iscsi_update_param_value(param,1022 &buf[0]) < 0)1023 return -1;1024 } else {1025 if (iscsi_update_param_value(param, value) < 0)1026 return -1;1027 }1028 } else {1029 if (iscsi_update_param_value(param, value) < 0)1030 return -1;1031 }1032 1033 if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) {1034 struct iscsi_param *param_mxdsl;1035 unsigned long long tmp;1036 int rc;1037 1038 rc = kstrtoull(param->value, 0, &tmp);1039 if (rc < 0)1040 return -1;1041 1042 conn->conn_ops->MaxRecvDataSegmentLength = tmp;1043 pr_debug("Saving op->MaxRecvDataSegmentLength from"1044 " original initiator received value: %u\n",1045 conn->conn_ops->MaxRecvDataSegmentLength);1046 1047 param_mxdsl = iscsi_find_param_from_key(1048 MAXXMITDATASEGMENTLENGTH,1049 conn->param_list);1050 if (!param_mxdsl)1051 return -1;1052 1053 rc = iscsi_update_param_value(param,1054 param_mxdsl->value);1055 if (rc < 0)1056 return -1;1057 1058 pr_debug("Updated %s to target MXDSL value: %s\n",1059 param->name, param->value);1060 }1061 } else if (IS_TYPE_VALUE_LIST(param)) {1062 negotiated_value = iscsi_check_valuelist_for_support(1063 param, value);1064 if (!negotiated_value) {1065 pr_err("Proposer's value list \"%s\" contains"1066 " no valid values from Acceptor's value list"1067 " \"%s\".\n", value, param->value);1068 return -1;1069 }1070 if (iscsi_update_param_value(param, negotiated_value) < 0)1071 return -1;1072 } else if (IS_PHASE_DECLARATIVE(param)) {1073 if (iscsi_update_param_value(param, value) < 0)1074 return -1;1075 SET_PSTATE_REPLY_OPTIONAL(param);1076 }1077 1078 return 0;1079}1080 1081static int iscsi_check_proposer_state(struct iscsi_param *param, char *value)1082{1083 if (IS_PSTATE_RESPONSE_GOT(param)) {1084 pr_err("Received key \"%s\" twice, protocol error.\n",1085 param->name);1086 return -1;1087 }1088 1089 if (IS_TYPE_VALUE_LIST(param)) {1090 char *comma_ptr = NULL, *tmp_ptr = NULL;1091 1092 comma_ptr = strchr(value, ',');1093 if (comma_ptr) {1094 pr_err("Illegal \",\" in response for \"%s\".\n",1095 param->name);1096 return -1;1097 }1098 1099 tmp_ptr = iscsi_check_valuelist_for_support(param, value);1100 if (!tmp_ptr)1101 return -1;1102 }1103 1104 if (iscsi_update_param_value(param, value) < 0)1105 return -1;1106 1107 return 0;1108}1109 1110static int iscsi_check_value(struct iscsi_param *param, char *value)1111{1112 char *comma_ptr = NULL;1113 1114 if (!strcmp(value, REJECT)) {1115 if (!strcmp(param->name, IFMARKINT) ||1116 !strcmp(param->name, OFMARKINT)) {1117 /*1118 * Reject is not fatal for [I,O]FMarkInt, and causes1119 * [I,O]FMarker to be reset to No. (See iSCSI v20 A.3.2)1120 */1121 SET_PSTATE_REJECT(param);1122 return 0;1123 }1124 pr_err("Received %s=%s\n", param->name, value);1125 return -1;1126 }1127 if (!strcmp(value, IRRELEVANT)) {1128 pr_debug("Received %s=%s\n", param->name, value);1129 SET_PSTATE_IRRELEVANT(param);1130 return 0;1131 }1132 if (!strcmp(value, NOTUNDERSTOOD)) {1133 if (!IS_PSTATE_PROPOSER(param)) {1134 pr_err("Received illegal offer %s=%s\n",1135 param->name, value);1136 return -1;1137 }1138 1139/* #warning FIXME: Add check for X-ExtensionKey here */1140 pr_err("Standard iSCSI key \"%s\" cannot be answered"1141 " with \"%s\", protocol error.\n", param->name, value);1142 return -1;1143 }1144 1145 do {1146 comma_ptr = NULL;1147 comma_ptr = strchr(value, ',');1148 1149 if (comma_ptr && !IS_TYPE_VALUE_LIST(param)) {1150 pr_err("Detected value separator \",\", but"1151 " key \"%s\" does not allow a value list,"1152 " protocol error.\n", param->name);1153 return -1;1154 }1155 if (comma_ptr)1156 *comma_ptr = '\0';1157 1158 if (strlen(value) > VALUE_MAXLEN) {1159 pr_err("Value for key \"%s\" exceeds %d,"1160 " protocol error.\n", param->name,1161 VALUE_MAXLEN);1162 return -1;1163 }1164 1165 if (IS_TYPE_BOOL_AND(param) || IS_TYPE_BOOL_OR(param)) {1166 if (iscsi_check_boolean_value(param, value) < 0)1167 return -1;1168 } else if (IS_TYPE_NUMBER(param)) {1169 if (iscsi_check_numerical_value(param, value) < 0)1170 return -1;1171 } else if (IS_TYPE_STRING(param) || IS_TYPE_VALUE_LIST(param)) {1172 if (iscsi_check_string_or_list_value(param, value) < 0)1173 return -1;1174 } else {1175 pr_err("Huh? 0x%02x\n", param->type);1176 return -1;1177 }1178 1179 if (comma_ptr)1180 *comma_ptr++ = ',';1181 1182 value = comma_ptr;1183 } while (value);1184 1185 return 0;1186}1187 1188static struct iscsi_param *__iscsi_check_key(1189 char *key,1190 int sender,1191 struct iscsi_param_list *param_list)1192{1193 struct iscsi_param *param;1194 1195 if (strlen(key) > KEY_MAXLEN) {1196 pr_err("Length of key name \"%s\" exceeds %d.\n",1197 key, KEY_MAXLEN);1198 return NULL;1199 }1200 1201 param = iscsi_find_param_from_key(key, param_list);1202 if (!param)1203 return NULL;1204 1205 if ((sender & SENDER_INITIATOR) && !IS_SENDER_INITIATOR(param)) {1206 pr_err("Key \"%s\" may not be sent to %s,"1207 " protocol error.\n", param->name,1208 (sender & SENDER_RECEIVER) ? "target" : "initiator");1209 return NULL;1210 }1211 1212 if ((sender & SENDER_TARGET) && !IS_SENDER_TARGET(param)) {1213 pr_err("Key \"%s\" may not be sent to %s,"1214 " protocol error.\n", param->name,1215 (sender & SENDER_RECEIVER) ? "initiator" : "target");1216 return NULL;1217 }1218 1219 return param;1220}1221 1222static struct iscsi_param *iscsi_check_key(1223 char *key,1224 int phase,1225 int sender,1226 struct iscsi_param_list *param_list)1227{1228 struct iscsi_param *param;1229 /*1230 * Key name length must not exceed 63 bytes. (See iSCSI v20 5.1)1231 */1232 if (strlen(key) > KEY_MAXLEN) {1233 pr_err("Length of key name \"%s\" exceeds %d.\n",1234 key, KEY_MAXLEN);1235 return NULL;1236 }1237 1238 param = iscsi_find_param_from_key(key, param_list);1239 if (!param)1240 return NULL;1241 1242 if ((sender & SENDER_INITIATOR) && !IS_SENDER_INITIATOR(param)) {1243 pr_err("Key \"%s\" may not be sent to %s,"1244 " protocol error.\n", param->name,1245 (sender & SENDER_RECEIVER) ? "target" : "initiator");1246 return NULL;1247 }1248 if ((sender & SENDER_TARGET) && !IS_SENDER_TARGET(param)) {1249 pr_err("Key \"%s\" may not be sent to %s,"1250 " protocol error.\n", param->name,1251 (sender & SENDER_RECEIVER) ? "initiator" : "target");1252 return NULL;1253 }1254 1255 if (IS_PSTATE_ACCEPTOR(param)) {1256 pr_err("Key \"%s\" received twice, protocol error.\n",1257 key);1258 return NULL;1259 }1260 1261 if (!phase)1262 return param;1263 1264 if (!(param->phase & phase)) {1265 char *phase_name;1266 1267 switch (phase) {1268 case PHASE_SECURITY:1269 phase_name = "Security";1270 break;1271 case PHASE_OPERATIONAL:1272 phase_name = "Operational";1273 break;1274 default:1275 phase_name = "Unknown";1276 }1277 pr_err("Key \"%s\" may not be negotiated during %s phase.\n",1278 param->name, phase_name);1279 return NULL;1280 }1281 1282 return param;1283}1284 1285static int iscsi_enforce_integrity_rules(1286 u8 phase,1287 struct iscsi_param_list *param_list)1288{1289 char *tmpptr;1290 u8 DataSequenceInOrder = 0;1291 u8 ErrorRecoveryLevel = 0, SessionType = 0;1292 u32 FirstBurstLength = 0, MaxBurstLength = 0;1293 struct iscsi_param *param = NULL;1294 1295 list_for_each_entry(param, ¶m_list->param_list, p_list) {1296 if (!(param->phase & phase))1297 continue;1298 if (!strcmp(param->name, SESSIONTYPE))1299 if (!strcmp(param->value, NORMAL))1300 SessionType = 1;1301 if (!strcmp(param->name, ERRORRECOVERYLEVEL))1302 ErrorRecoveryLevel = simple_strtoul(param->value,1303 &tmpptr, 0);1304 if (!strcmp(param->name, DATASEQUENCEINORDER))1305 if (!strcmp(param->value, YES))1306 DataSequenceInOrder = 1;1307 if (!strcmp(param->name, MAXBURSTLENGTH))1308 MaxBurstLength = simple_strtoul(param->value,1309 &tmpptr, 0);1310 }1311 1312 list_for_each_entry(param, ¶m_list->param_list, p_list) {1313 if (!(param->phase & phase))1314 continue;1315 if (!SessionType && !IS_PSTATE_ACCEPTOR(param))1316 continue;1317 if (!strcmp(param->name, MAXOUTSTANDINGR2T) &&1318 DataSequenceInOrder && (ErrorRecoveryLevel > 0)) {1319 if (strcmp(param->value, "1")) {1320 if (iscsi_update_param_value(param, "1") < 0)1321 return -1;1322 pr_debug("Reset \"%s\" to \"%s\".\n",1323 param->name, param->value);1324 }1325 }1326 if (!strcmp(param->name, MAXCONNECTIONS) && !SessionType) {1327 if (strcmp(param->value, "1")) {1328 if (iscsi_update_param_value(param, "1") < 0)1329 return -1;1330 pr_debug("Reset \"%s\" to \"%s\".\n",1331 param->name, param->value);1332 }1333 }1334 if (!strcmp(param->name, FIRSTBURSTLENGTH)) {1335 FirstBurstLength = simple_strtoul(param->value,1336 &tmpptr, 0);1337 if (FirstBurstLength > MaxBurstLength) {1338 char tmpbuf[11];1339 memset(tmpbuf, 0, sizeof(tmpbuf));1340 sprintf(tmpbuf, "%u", MaxBurstLength);1341 if (iscsi_update_param_value(param, tmpbuf))1342 return -1;1343 pr_debug("Reset \"%s\" to \"%s\".\n",1344 param->name, param->value);1345 }1346 }1347 }1348 1349 return 0;1350}1351 1352int iscsi_decode_text_input(1353 u8 phase,1354 u8 sender,1355 char *textbuf,1356 u32 length,1357 struct iscsit_conn *conn)1358{1359 struct iscsi_param_list *param_list = conn->param_list;1360 char *tmpbuf, *start = NULL, *end = NULL;1361 1362 tmpbuf = kmemdup_nul(textbuf, length, GFP_KERNEL);1363 if (!tmpbuf) {1364 pr_err("Unable to allocate %u + 1 bytes for tmpbuf.\n", length);1365 return -ENOMEM;1366 }1367 1368 start = tmpbuf;1369 end = (start + length);1370 1371 while (start < end) {1372 char *key, *value;1373 struct iscsi_param *param;1374 1375 if (iscsi_extract_key_value(start, &key, &value) < 0)1376 goto free_buffer;1377 1378 pr_debug("Got key: %s=%s\n", key, value);1379 1380 if (phase & PHASE_SECURITY) {1381 if (iscsi_check_for_auth_key(key) > 0) {1382 kfree(tmpbuf);1383 return 1;1384 }1385 }1386 1387 param = iscsi_check_key(key, phase, sender, param_list);1388 if (!param) {1389 if (iscsi_add_notunderstood_response(key, value,1390 param_list) < 0)1391 goto free_buffer;1392 1393 start += strlen(key) + strlen(value) + 2;1394 continue;1395 }1396 if (iscsi_check_value(param, value) < 0)1397 goto free_buffer;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 goto free_buffer;1404 1405 SET_PSTATE_RESPONSE_GOT(param);1406 } else {1407 if (iscsi_check_acceptor_state(param, value, conn) < 0)1408 goto free_buffer;1409 1410 SET_PSTATE_ACCEPTOR(param);1411 }1412 }1413 1414 kfree(tmpbuf);1415 return 0;1416 1417free_buffer:1418 kfree(tmpbuf);1419 return -1;1420}1421 1422int iscsi_encode_text_output(1423 u8 phase,1424 u8 sender,1425 char *textbuf,1426 u32 *length,1427 struct iscsi_param_list *param_list,1428 bool keys_workaround)1429{1430 char *output_buf = NULL;1431 struct iscsi_extra_response *er;1432 struct iscsi_param *param;1433 1434 output_buf = textbuf + *length;1435 1436 if (iscsi_enforce_integrity_rules(phase, param_list) < 0)1437 return -1;1438 1439 list_for_each_entry(param, ¶m_list->param_list, p_list) {1440 if (!(param->sender & sender))1441 continue;1442 if (IS_PSTATE_ACCEPTOR(param) &&1443 !IS_PSTATE_RESPONSE_SENT(param) &&1444 !IS_PSTATE_REPLY_OPTIONAL(param) &&1445 (param->phase & phase)) {1446 *length += sprintf(output_buf, "%s=%s",1447 param->name, param->value);1448 *length += 1;1449 output_buf = textbuf + *length;1450 SET_PSTATE_RESPONSE_SENT(param);1451 pr_debug("Sending key: %s=%s\n",1452 param->name, param->value);1453 continue;1454 }1455 if (IS_PSTATE_NEGOTIATE(param) &&1456 !IS_PSTATE_ACCEPTOR(param) &&1457 !IS_PSTATE_PROPOSER(param) &&1458 (param->phase & phase)) {1459 *length += sprintf(output_buf, "%s=%s",1460 param->name, param->value);1461 *length += 1;1462 output_buf = textbuf + *length;1463 SET_PSTATE_PROPOSER(param);1464 iscsi_check_proposer_for_optional_reply(param,1465 keys_workaround);1466 pr_debug("Sending key: %s=%s\n",1467 param->name, param->value);1468 }1469 }1470 1471 list_for_each_entry(er, ¶m_list->extra_response_list, er_list) {1472 *length += sprintf(output_buf, "%s=%s", er->key, er->value);1473 *length += 1;1474 output_buf = textbuf + *length;1475 pr_debug("Sending key: %s=%s\n", er->key, er->value);1476 }1477 iscsi_release_extra_responses(param_list);1478 1479 return 0;1480}1481 1482int iscsi_check_negotiated_keys(struct iscsi_param_list *param_list)1483{1484 int ret = 0;1485 struct iscsi_param *param;1486 1487 list_for_each_entry(param, ¶m_list->param_list, p_list) {1488 if (IS_PSTATE_NEGOTIATE(param) &&1489 IS_PSTATE_PROPOSER(param) &&1490 !IS_PSTATE_RESPONSE_GOT(param) &&1491 !IS_PSTATE_REPLY_OPTIONAL(param) &&1492 !IS_PHASE_DECLARATIVE(param)) {1493 pr_err("No response for proposed key \"%s\".\n",1494 param->name);1495 ret = -1;1496 }1497 }1498 1499 return ret;1500}1501 1502int iscsi_change_param_value(1503 char *keyvalue,1504 struct iscsi_param_list *param_list,1505 int check_key)1506{1507 char *key = NULL, *value = NULL;1508 struct iscsi_param *param;1509 int sender = 0;1510 1511 if (iscsi_extract_key_value(keyvalue, &key, &value) < 0)1512 return -1;1513 1514 if (!check_key) {1515 param = __iscsi_check_key(keyvalue, sender, param_list);1516 if (!param)1517 return -1;1518 } else {1519 param = iscsi_check_key(keyvalue, 0, sender, param_list);1520 if (!param)1521 return -1;1522 1523 param->set_param = 1;1524 if (iscsi_check_value(param, value) < 0) {1525 param->set_param = 0;1526 return -1;1527 }1528 param->set_param = 0;1529 }1530 1531 if (iscsi_update_param_value(param, value) < 0)1532 return -1;1533 1534 return 0;1535}1536 1537void iscsi_set_connection_parameters(1538 struct iscsi_conn_ops *ops,1539 struct iscsi_param_list *param_list)1540{1541 char *tmpptr;1542 struct iscsi_param *param;1543 1544 pr_debug("---------------------------------------------------"1545 "---------------\n");1546 list_for_each_entry(param, ¶m_list->param_list, p_list) {1547 /*1548 * Special case to set MAXXMITDATASEGMENTLENGTH from the1549 * target requested MaxRecvDataSegmentLength, even though1550 * this key is not sent over the wire.1551 */1552 if (!strcmp(param->name, MAXXMITDATASEGMENTLENGTH)) {1553 ops->MaxXmitDataSegmentLength =1554 simple_strtoul(param->value, &tmpptr, 0);1555 pr_debug("MaxXmitDataSegmentLength: %s\n",1556 param->value);1557 }1558 1559 if (!IS_PSTATE_ACCEPTOR(param) && !IS_PSTATE_PROPOSER(param))1560 continue;1561 if (!strcmp(param->name, AUTHMETHOD)) {1562 pr_debug("AuthMethod: %s\n",1563 param->value);1564 } else if (!strcmp(param->name, HEADERDIGEST)) {1565 ops->HeaderDigest = !strcmp(param->value, CRC32C);1566 pr_debug("HeaderDigest: %s\n",1567 param->value);1568 } else if (!strcmp(param->name, DATADIGEST)) {1569 ops->DataDigest = !strcmp(param->value, CRC32C);1570 pr_debug("DataDigest: %s\n",1571 param->value);1572 } else if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) {1573 /*1574 * At this point iscsi_check_acceptor_state() will have1575 * set ops->MaxRecvDataSegmentLength from the original1576 * initiator provided value.1577 */1578 pr_debug("MaxRecvDataSegmentLength: %u\n",1579 ops->MaxRecvDataSegmentLength);1580 } else if (!strcmp(param->name, INITIATORRECVDATASEGMENTLENGTH)) {1581 ops->InitiatorRecvDataSegmentLength =1582 simple_strtoul(param->value, &tmpptr, 0);1583 pr_debug("InitiatorRecvDataSegmentLength: %s\n",1584 param->value);1585 ops->MaxRecvDataSegmentLength =1586 ops->InitiatorRecvDataSegmentLength;1587 pr_debug("Set MRDSL from InitiatorRecvDataSegmentLength\n");1588 } else if (!strcmp(param->name, TARGETRECVDATASEGMENTLENGTH)) {1589 ops->TargetRecvDataSegmentLength =1590 simple_strtoul(param->value, &tmpptr, 0);1591 pr_debug("TargetRecvDataSegmentLength: %s\n",1592 param->value);1593 ops->MaxXmitDataSegmentLength =1594 ops->TargetRecvDataSegmentLength;1595 pr_debug("Set MXDSL from TargetRecvDataSegmentLength\n");1596 }1597 }1598 pr_debug("----------------------------------------------------"1599 "--------------\n");1600}1601 1602void iscsi_set_session_parameters(1603 struct iscsi_sess_ops *ops,1604 struct iscsi_param_list *param_list,1605 int leading)1606{1607 char *tmpptr;1608 struct iscsi_param *param;1609 1610 pr_debug("----------------------------------------------------"1611 "--------------\n");1612 list_for_each_entry(param, ¶m_list->param_list, p_list) {1613 if (!IS_PSTATE_ACCEPTOR(param) && !IS_PSTATE_PROPOSER(param))1614 continue;1615 if (!strcmp(param->name, INITIATORNAME)) {1616 if (!param->value)1617 continue;1618 if (leading)1619 snprintf(ops->InitiatorName,1620 sizeof(ops->InitiatorName),1621 "%s", param->value);1622 pr_debug("InitiatorName: %s\n",1623 param->value);1624 } else if (!strcmp(param->name, INITIATORALIAS)) {1625 if (!param->value)1626 continue;1627 snprintf(ops->InitiatorAlias,1628 sizeof(ops->InitiatorAlias),1629 "%s", param->value);1630 pr_debug("InitiatorAlias: %s\n",1631 param->value);1632 } else if (!strcmp(param->name, TARGETNAME)) {1633 if (!param->value)1634 continue;1635 if (leading)1636 snprintf(ops->TargetName,1637 sizeof(ops->TargetName),1638 "%s", param->value);1639 pr_debug("TargetName: %s\n",1640 param->value);1641 } else if (!strcmp(param->name, TARGETALIAS)) {1642 if (!param->value)1643 continue;1644 snprintf(ops->TargetAlias, sizeof(ops->TargetAlias),1645 "%s", param->value);1646 pr_debug("TargetAlias: %s\n",1647 param->value);1648 } else if (!strcmp(param->name, TARGETPORTALGROUPTAG)) {1649 ops->TargetPortalGroupTag =1650 simple_strtoul(param->value, &tmpptr, 0);1651 pr_debug("TargetPortalGroupTag: %s\n",1652 param->value);1653 } else if (!strcmp(param->name, MAXCONNECTIONS)) {1654 ops->MaxConnections =1655 simple_strtoul(param->value, &tmpptr, 0);1656 pr_debug("MaxConnections: %s\n",1657 param->value);1658 } else if (!strcmp(param->name, INITIALR2T)) {1659 ops->InitialR2T = !strcmp(param->value, YES);1660 pr_debug("InitialR2T: %s\n",1661 param->value);1662 } else if (!strcmp(param->name, IMMEDIATEDATA)) {1663 ops->ImmediateData = !strcmp(param->value, YES);1664 pr_debug("ImmediateData: %s\n",1665 param->value);1666 } else if (!strcmp(param->name, MAXBURSTLENGTH)) {1667 ops->MaxBurstLength =1668 simple_strtoul(param->value, &tmpptr, 0);1669 pr_debug("MaxBurstLength: %s\n",1670 param->value);1671 } else if (!strcmp(param->name, FIRSTBURSTLENGTH)) {1672 ops->FirstBurstLength =1673 simple_strtoul(param->value, &tmpptr, 0);1674 pr_debug("FirstBurstLength: %s\n",1675 param->value);1676 } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) {1677 ops->DefaultTime2Wait =1678 simple_strtoul(param->value, &tmpptr, 0);1679 pr_debug("DefaultTime2Wait: %s\n",1680 param->value);1681 } else if (!strcmp(param->name, DEFAULTTIME2RETAIN)) {1682 ops->DefaultTime2Retain =1683 simple_strtoul(param->value, &tmpptr, 0);1684 pr_debug("DefaultTime2Retain: %s\n",1685 param->value);1686 } else if (!strcmp(param->name, MAXOUTSTANDINGR2T)) {1687 ops->MaxOutstandingR2T =1688 simple_strtoul(param->value, &tmpptr, 0);1689 pr_debug("MaxOutstandingR2T: %s\n",1690 param->value);1691 } else if (!strcmp(param->name, DATAPDUINORDER)) {1692 ops->DataPDUInOrder = !strcmp(param->value, YES);1693 pr_debug("DataPDUInOrder: %s\n",1694 param->value);1695 } else if (!strcmp(param->name, DATASEQUENCEINORDER)) {1696 ops->DataSequenceInOrder = !strcmp(param->value, YES);1697 pr_debug("DataSequenceInOrder: %s\n",1698 param->value);1699 } else if (!strcmp(param->name, ERRORRECOVERYLEVEL)) {1700 ops->ErrorRecoveryLevel =1701 simple_strtoul(param->value, &tmpptr, 0);1702 pr_debug("ErrorRecoveryLevel: %s\n",1703 param->value);1704 } else if (!strcmp(param->name, SESSIONTYPE)) {1705 ops->SessionType = !strcmp(param->value, DISCOVERY);1706 pr_debug("SessionType: %s\n",1707 param->value);1708 } else if (!strcmp(param->name, RDMAEXTENSIONS)) {1709 ops->RDMAExtensions = !strcmp(param->value, YES);1710 pr_debug("RDMAExtensions: %s\n",1711 param->value);1712 }1713 }1714 pr_debug("----------------------------------------------------"1715 "--------------\n");1716 1717}1718