drivers/target/iscsi/iscsi_target_parameters.c

   1 /*******************************************************************************
   2  * This file contains main functions related to iSCSI Parameter negotiation.
   3  *
   4  * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
   5  *
   6  * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
   7  *
   8  * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  ******************************************************************************/
  20
  21 #include <linux/slab.h>
  22
  23 #include "iscsi_target_core.h"
  24 #include "iscsi_target_util.h"
  25 #include "iscsi_target_parameters.h"
  26
  27 int iscsi_login_rx_data(
  28         struct iscsi_conn *conn,
  29         char *buf,
  30         int length)
  31 {
  32         int rx_got;
  33         struct kvec iov;
  34
  35         memset(&iov, 0, sizeof(struct kvec));
  36         iov.iov_len     = length;
  37         iov.iov_base    = buf;
  38
  39         /*
  40          * Initial Marker-less Interval.
  41          * Add the values regardless of IFMarker/OFMarker, considering
  42          * it may not be negoitated yet.
  43          */
  44         conn->of_marker += length;
  45
  46         rx_got = rx_data(conn, &iov, 1, length);
  47         if (rx_got != length) {
  48                 pr_err("rx_data returned %d, expecting %d.\n",
  49                                 rx_got, length);
  50                 return -1;
  51         }
  52
  53         return 0 ;
  54 }
  55
  56 int iscsi_login_tx_data(
  57         struct iscsi_conn *conn,
  58         char *pdu_buf,
  59         char *text_buf,
  60         int text_length)
  61 {
  62         int length, tx_sent, iov_cnt = 1;
  63         struct kvec iov[2];
  64
  65         length = (ISCSI_HDR_LEN + text_length);
  66
  67         memset(&iov[0], 0, 2 * sizeof(struct kvec));
  68         iov[0].iov_len          = ISCSI_HDR_LEN;
  69         iov[0].iov_base         = pdu_buf;
  70
  71         if (text_buf && text_length) {
  72                 iov[1].iov_len  = text_length;
  73                 iov[1].iov_base = text_buf;
  74                 iov_cnt++;
  75         }
  76
  77         /*
  78          * Initial Marker-less Interval.
  79          * Add the values regardless of IFMarker/OFMarker, considering
  80          * it may not be negoitated yet.
  81          */
  82         conn->if_marker += length;
  83
  84         tx_sent = tx_data(conn, &iov[0], iov_cnt, length);
  85         if (tx_sent != length) {
  86                 pr_err("tx_data returned %d, expecting %d.\n",
  87                                 tx_sent, length);
  88                 return -1;
  89         }
  90
  91         return 0;
  92 }
  93
  94 void iscsi_dump_conn_ops(struct iscsi_conn_ops *conn_ops)
  95 {
  96         pr_debug("HeaderDigest: %s\n", (conn_ops->HeaderDigest) ?
  97                                 "CRC32C" : "None");
  98         pr_debug("DataDigest: %s\n", (conn_ops->DataDigest) ?
  99                                 "CRC32C" : "None");
 100         pr_debug("MaxRecvDataSegmentLength: %u\n",
 101                                 conn_ops->MaxRecvDataSegmentLength);
 102         pr_debug("OFMarker: %s\n", (conn_ops->OFMarker) ? "Yes" : "No");
 103         pr_debug("IFMarker: %s\n", (conn_ops->IFMarker) ? "Yes" : "No");
 104         if (conn_ops->OFMarker)
 105                 pr_debug("OFMarkInt: %u\n", conn_ops->OFMarkInt);
 106         if (conn_ops->IFMarker)
 107                 pr_debug("IFMarkInt: %u\n", conn_ops->IFMarkInt);
 108 }
 109
 110 void iscsi_dump_sess_ops(struct iscsi_sess_ops *sess_ops)
 111 {
 112         pr_debug("InitiatorName: %s\n", sess_ops->InitiatorName);
 113         pr_debug("InitiatorAlias: %s\n", sess_ops->InitiatorAlias);
 114         pr_debug("TargetName: %s\n", sess_ops->TargetName);
 115         pr_debug("TargetAlias: %s\n", sess_ops->TargetAlias);
 116         pr_debug("TargetPortalGroupTag: %hu\n",
 117                         sess_ops->TargetPortalGroupTag);
 118         pr_debug("MaxConnections: %hu\n", sess_ops->MaxConnections);
 119         pr_debug("InitialR2T: %s\n",
 120                         (sess_ops->InitialR2T) ? "Yes" : "No");
 121         pr_debug("ImmediateData: %s\n", (sess_ops->ImmediateData) ?
 122                         "Yes" : "No");
 123         pr_debug("MaxBurstLength: %u\n", sess_ops->MaxBurstLength);
 124         pr_debug("FirstBurstLength: %u\n", sess_ops->FirstBurstLength);
 125         pr_debug("DefaultTime2Wait: %hu\n", sess_ops->DefaultTime2Wait);
 126         pr_debug("DefaultTime2Retain: %hu\n",
 127                         sess_ops->DefaultTime2Retain);
 128         pr_debug("MaxOutstandingR2T: %hu\n",
 129                         sess_ops->MaxOutstandingR2T);
 130         pr_debug("DataPDUInOrder: %s\n",
 131                         (sess_ops->DataPDUInOrder) ? "Yes" : "No");
 132         pr_debug("DataSequenceInOrder: %s\n",
 133                         (sess_ops->DataSequenceInOrder) ? "Yes" : "No");
 134         pr_debug("ErrorRecoveryLevel: %hu\n",
 135                         sess_ops->ErrorRecoveryLevel);
 136         pr_debug("SessionType: %s\n", (sess_ops->SessionType) ?
 137                         "Discovery" : "Normal");
 138 }
 139
 140 void iscsi_print_params(struct iscsi_param_list *param_list)
 141 {
 142         struct iscsi_param *param;
 143
 144         list_for_each_entry(param, &param_list->param_list, p_list)
 145                 pr_debug("%s: %s\n", param->name, param->value);
 146 }
 147
 148 static struct iscsi_param *iscsi_set_default_param(struct iscsi_param_list *param_list,
 149                 char *name, char *value, u8 phase, u8 scope, u8 sender,
 150                 u16 type_range, u8 use)
 151 {
 152         struct iscsi_param *param = NULL;
 153
 154         param = kzalloc(sizeof(struct iscsi_param), GFP_KERNEL);
 155         if (!param) {
 156                 pr_err("Unable to allocate memory for parameter.\n");
 157                 goto out;
 158         }
 159         INIT_LIST_HEAD(&param->p_list);
 160
 161         param->name = kstrdup(name, GFP_KERNEL);
 162         if (!param->name) {
 163                 pr_err("Unable to allocate memory for parameter name.\n");
 164                 goto out;
 165         }
 166
 167         param->value = kstrdup(value, GFP_KERNEL);
 168         if (!param->value) {
 169                 pr_err("Unable to allocate memory for parameter value.\n");
 170                 goto out;
 171         }
 172
 173         param->phase            = phase;
 174         param->scope            = scope;
 175         param->sender           = sender;
 176         param->use              = use;
 177         param->type_range       = type_range;
 178
 179         switch (param->type_range) {
 180         case TYPERANGE_BOOL_AND:
 181                 param->type = TYPE_BOOL_AND;
 182                 break;
 183         case TYPERANGE_BOOL_OR:
 184                 param->type = TYPE_BOOL_OR;
 185                 break;
 186         case TYPERANGE_0_TO_2:
 187         case TYPERANGE_0_TO_3600:
 188         case TYPERANGE_0_TO_32767:
 189         case TYPERANGE_0_TO_65535:
 190         case TYPERANGE_1_TO_65535:
 191         case TYPERANGE_2_TO_3600:
 192         case TYPERANGE_512_TO_16777215:
 193                 param->type = TYPE_NUMBER;
 194                 break;
 195         case TYPERANGE_AUTH:
 196         case TYPERANGE_DIGEST:
 197                 param->type = TYPE_VALUE_LIST | TYPE_STRING;
 198                 break;
 199         case TYPERANGE_MARKINT:
 200                 param->type = TYPE_NUMBER_RANGE;
 201                 param->type_range |= TYPERANGE_1_TO_65535;
 202                 break;
 203         case TYPERANGE_ISCSINAME:
 204         case TYPERANGE_SESSIONTYPE:
 205         case TYPERANGE_TARGETADDRESS:
 206         case TYPERANGE_UTF8:
 207                 param->type = TYPE_STRING;
 208                 break;
 209         default:
 210                 pr_err("Unknown type_range 0x%02x\n",
 211                                 param->type_range);
 212                 goto out;
 213         }
 214         list_add_tail(&param->p_list, &param_list->param_list);
 215
 216         return param;
 217 out:
 218         if (param) {
 219                 kfree(param->value);
 220                 kfree(param->name);
 221                 kfree(param);
 222         }
 223
 224         return NULL;
 225 }
 226
 227 /* #warning Add extension keys */
 228 int iscsi_create_default_params(struct iscsi_param_list **param_list_ptr)
 229 {
 230         struct iscsi_param *param = NULL;
 231         struct iscsi_param_list *pl;
 232
 233         pl = kzalloc(sizeof(struct iscsi_param_list), GFP_KERNEL);
 234         if (!pl) {
 235                 pr_err("Unable to allocate memory for"
 236                                 " struct iscsi_param_list.\n");
 237                 return -1 ;
 238         }
 239         INIT_LIST_HEAD(&pl->param_list);
 240         INIT_LIST_HEAD(&pl->extra_response_list);
 241
 242         /*
 243          * The format for setting the initial parameter definitions are:
 244          *
 245          * Parameter name:
 246          * Initial value:
 247          * Allowable phase:
 248          * Scope:
 249          * Allowable senders:
 250          * Typerange:
 251          * Use:
 252          */
 253         param = iscsi_set_default_param(pl, AUTHMETHOD, INITIAL_AUTHMETHOD,
 254                         PHASE_SECURITY, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
 255                         TYPERANGE_AUTH, USE_INITIAL_ONLY);
 256         if (!param)
 257                 goto out;
 258
 259         param = iscsi_set_default_param(pl, HEADERDIGEST, INITIAL_HEADERDIGEST,
 260                         PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
 261                         TYPERANGE_DIGEST, USE_INITIAL_ONLY);
 262         if (!param)
 263                 goto out;
 264
 265         param = iscsi_set_default_param(pl, DATADIGEST, INITIAL_DATADIGEST,
 266                         PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
 267                         TYPERANGE_DIGEST, USE_INITIAL_ONLY);
 268         if (!param)
 269                 goto out;
 270
 271         param = iscsi_set_default_param(pl, MAXCONNECTIONS,
 272                         INITIAL_MAXCONNECTIONS, PHASE_OPERATIONAL,
 273                         SCOPE_SESSION_WIDE, SENDER_BOTH,
 274                         TYPERANGE_1_TO_65535, USE_LEADING_ONLY);
 275         if (!param)
 276                 goto out;
 277
 278         param = iscsi_set_default_param(pl, SENDTARGETS, INITIAL_SENDTARGETS,
 279                         PHASE_FFP0, SCOPE_SESSION_WIDE, SENDER_INITIATOR,
 280                         TYPERANGE_UTF8, 0);
 281         if (!param)
 282                 goto out;
 283
 284         param = iscsi_set_default_param(pl, TARGETNAME, INITIAL_TARGETNAME,
 285                         PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_BOTH,
 286                         TYPERANGE_ISCSINAME, USE_ALL);
 287         if (!param)
 288                 goto out;
 289
 290         param = iscsi_set_default_param(pl, INITIATORNAME,
 291                         INITIAL_INITIATORNAME, PHASE_DECLARATIVE,
 292                         SCOPE_SESSION_WIDE, SENDER_INITIATOR,
 293                         TYPERANGE_ISCSINAME, USE_INITIAL_ONLY);
 294         if (!param)
 295                 goto out;
 296
 297         param = iscsi_set_default_param(pl, TARGETALIAS, INITIAL_TARGETALIAS,
 298                         PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_TARGET,
 299                         TYPERANGE_UTF8, USE_ALL);
 300         if (!param)
 301                 goto out;
 302
 303         param = iscsi_set_default_param(pl, INITIATORALIAS,
 304                         INITIAL_INITIATORALIAS, PHASE_DECLARATIVE,
 305                         SCOPE_SESSION_WIDE, SENDER_INITIATOR, TYPERANGE_UTF8,
 306                         USE_ALL);
 307         if (!param)
 308                 goto out;
 309
 310         param = iscsi_set_default_param(pl, TARGETADDRESS,
 311                         INITIAL_TARGETADDRESS, PHASE_DECLARATIVE,
 312                         SCOPE_SESSION_WIDE, SENDER_TARGET,
 313                         TYPERANGE_TARGETADDRESS, USE_ALL);
 314         if (!param)
 315                 goto out;
 316
 317         param = iscsi_set_default_param(pl, TARGETPORTALGROUPTAG,
 318                         INITIAL_TARGETPORTALGROUPTAG,
 319                         PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_TARGET,
 320                         TYPERANGE_0_TO_65535, USE_INITIAL_ONLY);
 321         if (!param)
 322                 goto out;
 323
 324         param = iscsi_set_default_param(pl, INITIALR2T, INITIAL_INITIALR2T,
 325                         PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
 326                         TYPERANGE_BOOL_OR, USE_LEADING_ONLY);
 327         if (!param)
 328                 goto out;
 329
 330         param = iscsi_set_default_param(pl, IMMEDIATEDATA,
 331                         INITIAL_IMMEDIATEDATA, PHASE_OPERATIONAL,
 332                         SCOPE_SESSION_WIDE, SENDER_BOTH, TYPERANGE_BOOL_AND,
 333                         USE_LEADING_ONLY);
 334         if (!param)
 335                 goto out;
 336
 337         param = iscsi_set_default_param(pl, MAXXMITDATASEGMENTLENGTH,
 338                         INITIAL_MAXXMITDATASEGMENTLENGTH,
 339                         PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
 340                         TYPERANGE_512_TO_16777215, USE_ALL);
 341         if (!param)
 342                 goto out;
 343
 344         param = iscsi_set_default_param(pl, MAXRECVDATASEGMENTLENGTH,
 345                         INITIAL_MAXRECVDATASEGMENTLENGTH,
 346                         PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
 347                         TYPERANGE_512_TO_16777215, USE_ALL);
 348         if (!param)
 349                 goto out;
 350
 351         param = iscsi_set_default_param(pl, MAXBURSTLENGTH,
 352                         INITIAL_MAXBURSTLENGTH, PHASE_OPERATIONAL,
 353                         SCOPE_SESSION_WIDE, SENDER_BOTH,
 354                         TYPERANGE_512_TO_16777215, USE_LEADING_ONLY);
 355         if (!param)
 356                 goto out;
 357
 358         param = iscsi_set_default_param(pl, FIRSTBURSTLENGTH,
 359                         INITIAL_FIRSTBURSTLENGTH,
 360                         PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
 361                         TYPERANGE_512_TO_16777215, USE_LEADING_ONLY);
 362         if (!param)
 363                 goto out;
 364
 365         param = iscsi_set_default_param(pl, DEFAULTTIME2WAIT,
 366                         INITIAL_DEFAULTTIME2WAIT,
 367                         PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
 368                         TYPERANGE_0_TO_3600, USE_LEADING_ONLY);
 369         if (!param)
 370                 goto out;
 371
 372         param = iscsi_set_default_param(pl, DEFAULTTIME2RETAIN,
 373                         INITIAL_DEFAULTTIME2RETAIN,
 374                         PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
 375                         TYPERANGE_0_TO_3600, USE_LEADING_ONLY);
 376         if (!param)
 377                 goto out;
 378
 379         param = iscsi_set_default_param(pl, MAXOUTSTANDINGR2T,
 380                         INITIAL_MAXOUTSTANDINGR2T,
 381                         PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
 382                         TYPERANGE_1_TO_65535, USE_LEADING_ONLY);
 383         if (!param)
 384                 goto out;
 385
 386         param = iscsi_set_default_param(pl, DATAPDUINORDER,
 387                         INITIAL_DATAPDUINORDER, PHASE_OPERATIONAL,
 388                         SCOPE_SESSION_WIDE, SENDER_BOTH, TYPERANGE_BOOL_OR,
 389                         USE_LEADING_ONLY);
 390         if (!param)
 391                 goto out;
 392
 393         param = iscsi_set_default_param(pl, DATASEQUENCEINORDER,
 394                         INITIAL_DATASEQUENCEINORDER,
 395                         PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
 396                         TYPERANGE_BOOL_OR, USE_LEADING_ONLY);
 397         if (!param)
 398                 goto out;
 399
 400         param = iscsi_set_default_param(pl, ERRORRECOVERYLEVEL,
 401                         INITIAL_ERRORRECOVERYLEVEL,
 402                         PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
 403                         TYPERANGE_0_TO_2, USE_LEADING_ONLY);
 404         if (!param)
 405                 goto out;
 406
 407         param = iscsi_set_default_param(pl, SESSIONTYPE, INITIAL_SESSIONTYPE,
 408                         PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_INITIATOR,
 409                         TYPERANGE_SESSIONTYPE, USE_LEADING_ONLY);
 410         if (!param)
 411                 goto out;
 412
 413         param = iscsi_set_default_param(pl, IFMARKER, INITIAL_IFMARKER,
 414                         PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
 415                         TYPERANGE_BOOL_AND, USE_INITIAL_ONLY);
 416         if (!param)
 417                 goto out;
 418
 419         param = iscsi_set_default_param(pl, OFMARKER, INITIAL_OFMARKER,
 420                         PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
 421                         TYPERANGE_BOOL_AND, USE_INITIAL_ONLY);
 422         if (!param)
 423                 goto out;
 424
 425         param = iscsi_set_default_param(pl, IFMARKINT, INITIAL_IFMARKINT,
 426                         PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
 427                         TYPERANGE_MARKINT, USE_INITIAL_ONLY);
 428         if (!param)
 429                 goto out;
 430
 431         param = iscsi_set_default_param(pl, OFMARKINT, INITIAL_OFMARKINT,
 432                         PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
 433                         TYPERANGE_MARKINT, USE_INITIAL_ONLY);
 434         if (!param)
 435                 goto out;
 436         /*
 437          * Extra parameters for ISER from RFC-5046
 438          */
 439         param = iscsi_set_default_param(pl, RDMAEXTENTIONS, INITIAL_RDMAEXTENTIONS,
 440                         PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
 441                         TYPERANGE_BOOL_AND, USE_LEADING_ONLY);
 442         if (!param)
 443                 goto out;
 444
 445         param = iscsi_set_default_param(pl, INITIATORRECVDATASEGMENTLENGTH,
 446                         INITIAL_INITIATORRECVDATASEGMENTLENGTH,
 447                         PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
 448                         TYPERANGE_512_TO_16777215, USE_ALL);
 449         if (!param)
 450                 goto out;
 451
 452         param = iscsi_set_default_param(pl, TARGETRECVDATASEGMENTLENGTH,
 453                         INITIAL_TARGETRECVDATASEGMENTLENGTH,
 454                         PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
 455                         TYPERANGE_512_TO_16777215, USE_ALL);
 456         if (!param)
 457                 goto out;
 458
 459         *param_list_ptr = pl;
 460         return 0;
 461 out:
 462         iscsi_release_param_list(pl);
 463         return -1;
 464 }
 465
 466 int iscsi_set_keys_to_negotiate(
 467         struct iscsi_param_list *param_list,
 468         bool iser)
 469 {
 470         struct iscsi_param *param;
 471
 472         param_list->iser = iser;
 473
 474         list_for_each_entry(param, &param_list->param_list, p_list) {
 475                 param->state = 0;
 476                 if (!strcmp(param->name, AUTHMETHOD)) {
 477                         SET_PSTATE_NEGOTIATE(param);
 478                 } else if (!strcmp(param->name, HEADERDIGEST)) {
 479                         if (iser == false)
 480                                 SET_PSTATE_NEGOTIATE(param);
 481                 } else if (!strcmp(param->name, DATADIGEST)) {
 482                         if (iser == false)
 483                                 SET_PSTATE_NEGOTIATE(param);
 484                 } else if (!strcmp(param->name, MAXCONNECTIONS)) {
 485                         SET_PSTATE_NEGOTIATE(param);
 486                 } else if (!strcmp(param->name, TARGETNAME)) {
 487                         continue;
 488                 } else if (!strcmp(param->name, INITIATORNAME)) {
 489                         continue;
 490                 } else if (!strcmp(param->name, TARGETALIAS)) {
 491                         if (param->value)
 492                                 SET_PSTATE_NEGOTIATE(param);
 493                 } else if (!strcmp(param->name, INITIATORALIAS)) {
 494                         continue;
 495                 } else if (!strcmp(param->name, TARGETPORTALGROUPTAG)) {
 496                         SET_PSTATE_NEGOTIATE(param);
 497                 } else if (!strcmp(param->name, INITIALR2T)) {
 498                         SET_PSTATE_NEGOTIATE(param);
 499                 } else if (!strcmp(param->name, IMMEDIATEDATA)) {
 500                         SET_PSTATE_NEGOTIATE(param);
 501                 } else if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) {
 502                         if (iser == false)
 503                                 SET_PSTATE_NEGOTIATE(param);
 504                 } else if (!strcmp(param->name, MAXXMITDATASEGMENTLENGTH)) {
 505                         continue;
 506                 } else if (!strcmp(param->name, MAXBURSTLENGTH)) {
 507                         SET_PSTATE_NEGOTIATE(param);
 508                 } else if (!strcmp(param->name, FIRSTBURSTLENGTH)) {
 509                         SET_PSTATE_NEGOTIATE(param);
 510                 } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) {
 511                         SET_PSTATE_NEGOTIATE(param);
 512                 } else if (!strcmp(param->name, DEFAULTTIME2RETAIN)) {
 513                         SET_PSTATE_NEGOTIATE(param);
 514                 } else if (!strcmp(param->name, MAXOUTSTANDINGR2T)) {
 515                         SET_PSTATE_NEGOTIATE(param);
 516                 } else if (!strcmp(param->name, DATAPDUINORDER)) {
 517                         SET_PSTATE_NEGOTIATE(param);
 518                 } else if (!strcmp(param->name, DATASEQUENCEINORDER)) {
 519                         SET_PSTATE_NEGOTIATE(param);
 520                 } else if (!strcmp(param->name, ERRORRECOVERYLEVEL)) {
 521                         SET_PSTATE_NEGOTIATE(param);
 522                 } else if (!strcmp(param->name, SESSIONTYPE)) {
 523                         SET_PSTATE_NEGOTIATE(param);
 524                 } else if (!strcmp(param->name, IFMARKER)) {
 525                         SET_PSTATE_NEGOTIATE(param);
 526                 } else if (!strcmp(param->name, OFMARKER)) {
 527                         SET_PSTATE_NEGOTIATE(param);
 528                 } else if (!strcmp(param->name, IFMARKINT)) {
 529                         SET_PSTATE_NEGOTIATE(param);
 530                 } else if (!strcmp(param->name, OFMARKINT)) {
 531                         SET_PSTATE_NEGOTIATE(param);
 532                 } else if (!strcmp(param->name, RDMAEXTENTIONS)) {
 533                         if (iser == true)
 534                                 SET_PSTATE_NEGOTIATE(param);
 535                 } else if (!strcmp(param->name, INITIATORRECVDATASEGMENTLENGTH)) {
 536                         if (iser == true)
 537                                 SET_PSTATE_NEGOTIATE(param);
 538                 } else if (!strcmp(param->name, TARGETRECVDATASEGMENTLENGTH)) {
 539                         if (iser == true)
 540                                 SET_PSTATE_NEGOTIATE(param);
 541                 }
 542         }
 543
 544         return 0;
 545 }
 546
 547 int iscsi_set_keys_irrelevant_for_discovery(
 548         struct iscsi_param_list *param_list)
 549 {
 550         struct iscsi_param *param;
 551
 552         list_for_each_entry(param, &param_list->param_list, p_list) {
 553                 if (!strcmp(param->name, MAXCONNECTIONS))
 554                         param->state &= ~PSTATE_NEGOTIATE;
 555                 else if (!strcmp(param->name, INITIALR2T))
 556                         param->state &= ~PSTATE_NEGOTIATE;
 557                 else if (!strcmp(param->name, IMMEDIATEDATA))
 558                         param->state &= ~PSTATE_NEGOTIATE;
 559                 else if (!strcmp(param->name, MAXBURSTLENGTH))
 560                         param->state &= ~PSTATE_NEGOTIATE;
 561                 else if (!strcmp(param->name, FIRSTBURSTLENGTH))
 562                         param->state &= ~PSTATE_NEGOTIATE;
 563                 else if (!strcmp(param->name, MAXOUTSTANDINGR2T))
 564                         param->state &= ~PSTATE_NEGOTIATE;
 565                 else if (!strcmp(param->name, DATAPDUINORDER))
 566                         param->state &= ~PSTATE_NEGOTIATE;
 567                 else if (!strcmp(param->name, DATASEQUENCEINORDER))
 568                         param->state &= ~PSTATE_NEGOTIATE;
 569                 else if (!strcmp(param->name, ERRORRECOVERYLEVEL))
 570                         param->state &= ~PSTATE_NEGOTIATE;
 571                 else if (!strcmp(param->name, DEFAULTTIME2WAIT))
 572                         param->state &= ~PSTATE_NEGOTIATE;
 573                 else if (!strcmp(param->name, DEFAULTTIME2RETAIN))
 574                         param->state &= ~PSTATE_NEGOTIATE;
 575                 else if (!strcmp(param->name, IFMARKER))
 576                         param->state &= ~PSTATE_NEGOTIATE;
 577                 else if (!strcmp(param->name, OFMARKER))
 578                         param->state &= ~PSTATE_NEGOTIATE;
 579                 else if (!strcmp(param->name, IFMARKINT))
 580                         param->state &= ~PSTATE_NEGOTIATE;
 581                 else if (!strcmp(param->name, OFMARKINT))
 582                         param->state &= ~PSTATE_NEGOTIATE;
 583                 else if (!strcmp(param->name, RDMAEXTENTIONS))
 584                         param->state &= ~PSTATE_NEGOTIATE;
 585                 else if (!strcmp(param->name, INITIATORRECVDATASEGMENTLENGTH))
 586                         param->state &= ~PSTATE_NEGOTIATE;
 587                 else if (!strcmp(param->name, TARGETRECVDATASEGMENTLENGTH))
 588                         param->state &= ~PSTATE_NEGOTIATE;
 589         }
 590
 591         return 0;
 592 }
 593
 594 int iscsi_copy_param_list(
 595         struct iscsi_param_list **dst_param_list,
 596         struct iscsi_param_list *src_param_list,
 597         int leading)
 598 {
 599         struct iscsi_param *param = NULL;
 600         struct iscsi_param *new_param = NULL;
 601         struct iscsi_param_list *param_list = NULL;
 602
 603         param_list = kzalloc(sizeof(struct iscsi_param_list), GFP_KERNEL);
 604         if (!param_list) {
 605                 pr_err("Unable to allocate memory for struct iscsi_param_list.\n");
 606                 goto err_out;
 607         }
 608         INIT_LIST_HEAD(&param_list->param_list);
 609         INIT_LIST_HEAD(&param_list->extra_response_list);
 610
 611         list_for_each_entry(param, &src_param_list->param_list, p_list) {
 612                 if (!leading && (param->scope & SCOPE_SESSION_WIDE)) {
 613                         if ((strcmp(param->name, "TargetName") != 0) &&
 614                             (strcmp(param->name, "InitiatorName") != 0) &&
 615                             (strcmp(param->name, "TargetPortalGroupTag") != 0))
 616                                 continue;
 617                 }
 618
 619                 new_param = kzalloc(sizeof(struct iscsi_param), GFP_KERNEL);
 620                 if (!new_param) {
 621                         pr_err("Unable to allocate memory for struct iscsi_param.\n");
 622                         goto err_out;
 623                 }
 624
 625                 new_param->name = kstrdup(param->name, GFP_KERNEL);
 626                 new_param->value = kstrdup(param->value, GFP_KERNEL);
 627                 if (!new_param->value || !new_param->name) {
 628                         kfree(new_param->value);
 629                         kfree(new_param->name);
 630                         kfree(new_param);
 631                         pr_err("Unable to allocate memory for parameter name/value.\n");
 632                         goto err_out;
 633                 }
 634
 635                 new_param->set_param = param->set_param;
 636                 new_param->phase = param->phase;
 637                 new_param->scope = param->scope;
 638                 new_param->sender = param->sender;
 639                 new_param->type = param->type;
 640                 new_param->use = param->use;
 641                 new_param->type_range = param->type_range;
 642
 643                 list_add_tail(&new_param->p_list, &param_list->param_list);
 644         }
 645
 646         if (!list_empty(&param_list->param_list)) {
 647                 *dst_param_list = param_list;
 648         } else {
 649                 pr_err("No parameters allocated.\n");
 650                 goto err_out;
 651         }
 652
 653         return 0;
 654
 655 err_out:
 656         iscsi_release_param_list(param_list);
 657         return -1;
 658 }
 659
 660 static void iscsi_release_extra_responses(struct iscsi_param_list *param_list)
 661 {
 662         struct iscsi_extra_response *er, *er_tmp;
 663
 664         list_for_each_entry_safe(er, er_tmp, &param_list->extra_response_list,
 665                         er_list) {
 666                 list_del(&er->er_list);
 667                 kfree(er);
 668         }
 669 }
 670
 671 void iscsi_release_param_list(struct iscsi_param_list *param_list)
 672 {
 673         struct iscsi_param *param, *param_tmp;
 674
 675         list_for_each_entry_safe(param, param_tmp, &param_list->param_list,
 676                         p_list) {
 677                 list_del(&param->p_list);
 678
 679                 kfree(param->name);
 680                 kfree(param->value);
 681                 kfree(param);
 682         }
 683
 684         iscsi_release_extra_responses(param_list);
 685
 686         kfree(param_list);
 687 }
 688
 689 struct iscsi_param *iscsi_find_param_from_key(
 690         char *key,
 691         struct iscsi_param_list *param_list)
 692 {
 693         struct iscsi_param *param;
 694
 695         if (!key || !param_list) {
 696                 pr_err("Key or parameter list pointer is NULL.\n");
 697                 return NULL;
 698         }
 699
 700         list_for_each_entry(param, &param_list->param_list, p_list) {
 701                 if (!strcmp(key, param->name))
 702                         return param;
 703         }
 704
 705         pr_err("Unable to locate key \"%s\".\n", key);
 706         return NULL;
 707 }
 708
 709 int iscsi_extract_key_value(char *textbuf, char **key, char **value)
 710 {
 711         *value = strchr(textbuf, '=');
 712         if (!*value) {
 713                 pr_err("Unable to locate \"=\" separator for key,"
 714                                 " ignoring request.\n");
 715                 return -1;
 716         }
 717
 718         *key = textbuf;
 719         **value = '\0';
 720         *value = *value + 1;
 721
 722         return 0;
 723 }
 724
 725 int iscsi_update_param_value(struct iscsi_param *param, char *value)
 726 {
 727         kfree(param->value);
 728
 729         param->value = kstrdup(value, GFP_KERNEL);
 730         if (!param->value) {
 731                 pr_err("Unable to allocate memory for value.\n");
 732                 return -ENOMEM;
 733         }
 734
 735         pr_debug("iSCSI Parameter updated to %s=%s\n",
 736                         param->name, param->value);
 737         return 0;
 738 }
 739
 740 static int iscsi_add_notunderstood_response(
 741         char *key,
 742         char *value,
 743         struct iscsi_param_list *param_list)
 744 {
 745         struct iscsi_extra_response *extra_response;
 746
 747         if (strlen(value) > VALUE_MAXLEN) {
 748                 pr_err("Value for notunderstood key \"%s\" exceeds %d,"
 749                         " protocol error.\n", key, VALUE_MAXLEN);
 750                 return -1;
 751         }
 752
 753         extra_response = kzalloc(sizeof(struct iscsi_extra_response), GFP_KERNEL);
 754         if (!extra_response) {
 755                 pr_err("Unable to allocate memory for"
 756                         " struct iscsi_extra_response.\n");
 757                 return -1;
 758         }
 759         INIT_LIST_HEAD(&extra_response->er_list);
 760
 761         strncpy(extra_response->key, key, strlen(key) + 1);
 762         strncpy(extra_response->value, NOTUNDERSTOOD,
 763                         strlen(NOTUNDERSTOOD) + 1);
 764
 765         list_add_tail(&extra_response->er_list,
 766                         &param_list->extra_response_list);
 767         return 0;
 768 }
 769
 770 static int iscsi_check_for_auth_key(char *key)
 771 {
 772         /*
 773          * RFC 1994
 774          */
 775         if (!strcmp(key, "CHAP_A") || !strcmp(key, "CHAP_I") ||
 776             !strcmp(key, "CHAP_C") || !strcmp(key, "CHAP_N") ||
 777             !strcmp(key, "CHAP_R"))
 778                 return 1;
 779
 780         /*
 781          * RFC 2945
 782          */
 783         if (!strcmp(key, "SRP_U") || !strcmp(key, "SRP_N") ||
 784             !strcmp(key, "SRP_g") || !strcmp(key, "SRP_s") ||
 785             !strcmp(key, "SRP_A") || !strcmp(key, "SRP_B") ||
 786             !strcmp(key, "SRP_M") || !strcmp(key, "SRP_HM"))
 787                 return 1;
 788
 789         return 0;
 790 }
 791
 792 static void iscsi_check_proposer_for_optional_reply(struct iscsi_param *param)
 793 {
 794         if (IS_TYPE_BOOL_AND(param)) {
 795                 if (!strcmp(param->value, NO))
 796                         SET_PSTATE_REPLY_OPTIONAL(param);
 797         } else if (IS_TYPE_BOOL_OR(param)) {
 798                 if (!strcmp(param->value, YES))
 799                         SET_PSTATE_REPLY_OPTIONAL(param);
 800                  /*
 801                   * Required for gPXE iSCSI boot client
 802                   */
 803                 if (!strcmp(param->name, IMMEDIATEDATA))
 804                         SET_PSTATE_REPLY_OPTIONAL(param);
 805         } else if (IS_TYPE_NUMBER(param)) {
 806                 if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH))
 807                         SET_PSTATE_REPLY_OPTIONAL(param);
 808                 /*
 809                  * The GlobalSAN iSCSI Initiator for MacOSX does
 810                  * not respond to MaxBurstLength, FirstBurstLength,
 811                  * DefaultTime2Wait or DefaultTime2Retain parameter keys.
 812                  * So, we set them to 'reply optional' here, and assume the
 813                  * the defaults from iscsi_parameters.h if the initiator
 814                  * is not RFC compliant and the keys are not negotiated.
 815                  */
 816                 if (!strcmp(param->name, MAXBURSTLENGTH))
 817                         SET_PSTATE_REPLY_OPTIONAL(param);
 818                 if (!strcmp(param->name, FIRSTBURSTLENGTH))
 819                         SET_PSTATE_REPLY_OPTIONAL(param);
 820                 if (!strcmp(param->name, DEFAULTTIME2WAIT))
 821                         SET_PSTATE_REPLY_OPTIONAL(param);
 822                 if (!strcmp(param->name, DEFAULTTIME2RETAIN))
 823                         SET_PSTATE_REPLY_OPTIONAL(param);
 824                 /*
 825                  * Required for gPXE iSCSI boot client
 826                  */
 827                 if (!strcmp(param->name, MAXCONNECTIONS))
 828                         SET_PSTATE_REPLY_OPTIONAL(param);
 829         } else if (IS_PHASE_DECLARATIVE(param))
 830                 SET_PSTATE_REPLY_OPTIONAL(param);
 831 }
 832
 833 static int iscsi_check_boolean_value(struct iscsi_param *param, char *value)
 834 {
 835         if (strcmp(value, YES) && strcmp(value, NO)) {
 836                 pr_err("Illegal value for \"%s\", must be either"
 837                         " \"%s\" or \"%s\".\n", param->name, YES, NO);
 838                 return -1;
 839         }
 840
 841         return 0;
 842 }
 843
 844 static int iscsi_check_numerical_value(struct iscsi_param *param, char *value_ptr)
 845 {
 846         char *tmpptr;
 847         int value = 0;
 848
 849         value = simple_strtoul(value_ptr, &tmpptr, 0);
 850
 851         if (IS_TYPERANGE_0_TO_2(param)) {
 852                 if ((value < 0) || (value > 2)) {
 853                         pr_err("Illegal value for \"%s\", must be"
 854                                 " between 0 and 2.\n", param->name);
 855                         return -1;
 856                 }
 857                 return 0;
 858         }
 859         if (IS_TYPERANGE_0_TO_3600(param)) {
 860                 if ((value < 0) || (value > 3600)) {
 861                         pr_err("Illegal value for \"%s\", must be"
 862                                 " between 0 and 3600.\n", param->name);
 863                         return -1;
 864                 }
 865                 return 0;
 866         }
 867         if (IS_TYPERANGE_0_TO_32767(param)) {
 868                 if ((value < 0) || (value > 32767)) {
 869                         pr_err("Illegal value for \"%s\", must be"
 870                                 " between 0 and 32767.\n", param->name);
 871                         return -1;
 872                 }
 873                 return 0;
 874         }
 875         if (IS_TYPERANGE_0_TO_65535(param)) {
 876                 if ((value < 0) || (value > 65535)) {
 877                         pr_err("Illegal value for \"%s\", must be"
 878                                 " between 0 and 65535.\n", param->name);
 879                         return -1;
 880                 }
 881                 return 0;
 882         }
 883         if (IS_TYPERANGE_1_TO_65535(param)) {
 884                 if ((value < 1) || (value > 65535)) {
 885                         pr_err("Illegal value for \"%s\", must be"
 886                                 " between 1 and 65535.\n", param->name);
 887                         return -1;
 888                 }
 889                 return 0;
 890         }
 891         if (IS_TYPERANGE_2_TO_3600(param)) {
 892                 if ((value < 2) || (value > 3600)) {
 893                         pr_err("Illegal value for \"%s\", must be"
 894                                 " between 2 and 3600.\n", param->name);
 895                         return -1;
 896                 }
 897                 return 0;
 898         }
 899         if (IS_TYPERANGE_512_TO_16777215(param)) {
 900                 if ((value < 512) || (value > 16777215)) {
 901                         pr_err("Illegal value for \"%s\", must be"
 902                                 " between 512 and 16777215.\n", param->name);
 903                         return -1;
 904                 }
 905                 return 0;
 906         }
 907
 908         return 0;
 909 }
 910
 911 static int iscsi_check_numerical_range_value(struct iscsi_param *param, char *value)
 912 {
 913         char *left_val_ptr = NULL, *right_val_ptr = NULL;
 914         char *tilde_ptr = NULL;
 915         u32 left_val, right_val, local_left_val;
 916
 917         if (strcmp(param->name, IFMARKINT) &&
 918             strcmp(param->name, OFMARKINT)) {
 919                 pr_err("Only parameters \"%s\" or \"%s\" may contain a"
 920                        " numerical range value.\n", IFMARKINT, OFMARKINT);
 921                 return -1;
 922         }
 923
 924         if (IS_PSTATE_PROPOSER(param))
 925                 return 0;
 926
 927         tilde_ptr = strchr(value, '~');
 928         if (!tilde_ptr) {
 929                 pr_err("Unable to locate numerical range indicator"
 930                         " \"~\" for \"%s\".\n", param->name);
 931                 return -1;
 932         }
 933         *tilde_ptr = '\0';
 934
 935         left_val_ptr = value;
 936         right_val_ptr = value + strlen(left_val_ptr) + 1;
 937
 938         if (iscsi_check_numerical_value(param, left_val_ptr) < 0)
 939                 return -1;
 940         if (iscsi_check_numerical_value(param, right_val_ptr) < 0)
 941                 return -1;
 942
 943         left_val = simple_strtoul(left_val_ptr, NULL, 0);
 944         right_val = simple_strtoul(right_val_ptr, NULL, 0);
 945         *tilde_ptr = '~';
 946
 947         if (right_val < left_val) {
 948                 pr_err("Numerical range for parameter \"%s\" contains"
 949                         " a right value which is less than the left.\n",
 950                                 param->name);
 951                 return -1;
 952         }
 953
 954         /*
 955          * For now,  enforce reasonable defaults for [I,O]FMarkInt.
 956          */
 957         tilde_ptr = strchr(param->value, '~');
 958         if (!tilde_ptr) {
 959                 pr_err("Unable to locate numerical range indicator"
 960                         " \"~\" for \"%s\".\n", param->name);
 961                 return -1;
 962         }
 963         *tilde_ptr = '\0';
 964
 965         left_val_ptr = param->value;
 966         right_val_ptr = param->value + strlen(left_val_ptr) + 1;
 967
 968         local_left_val = simple_strtoul(left_val_ptr, NULL, 0);
 969         *tilde_ptr = '~';
 970
 971         if (param->set_param) {
 972                 if ((left_val < local_left_val) ||
 973                     (right_val < local_left_val)) {
 974                         pr_err("Passed value range \"%u~%u\" is below"
 975                                 " minimum left value \"%u\" for key \"%s\","
 976                                 " rejecting.\n", left_val, right_val,
 977                                 local_left_val, param->name);
 978                         return -1;
 979                 }
 980         } else {
 981                 if ((left_val < local_left_val) &&
 982                     (right_val < local_left_val)) {
 983                         pr_err("Received value range \"%u~%u\" is"
 984                                 " below minimum left value \"%u\" for key"
 985                                 " \"%s\", rejecting.\n", left_val, right_val,
 986                                 local_left_val, param->name);
 987                         SET_PSTATE_REJECT(param);
 988                         if (iscsi_update_param_value(param, REJECT) < 0)
 989                                 return -1;
 990                 }
 991         }
 992
 993         return 0;
 994 }
 995
 996 static int iscsi_check_string_or_list_value(struct iscsi_param *param, char *value)
 997 {
 998         if (IS_PSTATE_PROPOSER(param))
 999                 return 0;
1000
1001         if (IS_TYPERANGE_AUTH_PARAM(param)) {
1002                 if (strcmp(value, KRB5) && strcmp(value, SPKM1) &&
1003                     strcmp(value, SPKM2) && strcmp(value, SRP) &&
1004                     strcmp(value, CHAP) && strcmp(value, NONE)) {
1005                         pr_err("Illegal value for \"%s\", must be"
1006                                 " \"%s\", \"%s\", \"%s\", \"%s\", \"%s\""
1007                                 " or \"%s\".\n", param->name, KRB5,
1008                                         SPKM1, SPKM2, SRP, CHAP, NONE);
1009                         return -1;
1010                 }
1011         }
1012         if (IS_TYPERANGE_DIGEST_PARAM(param)) {
1013                 if (strcmp(value, CRC32C) && strcmp(value, NONE)) {
1014                         pr_err("Illegal value for \"%s\", must be"
1015                                 " \"%s\" or \"%s\".\n", param->name,
1016                                         CRC32C, NONE);
1017                         return -1;
1018                 }
1019         }
1020         if (IS_TYPERANGE_SESSIONTYPE(param)) {
1021                 if (strcmp(value, DISCOVERY) && strcmp(value, NORMAL)) {
1022                         pr_err("Illegal value for \"%s\", must be"
1023                                 " \"%s\" or \"%s\".\n", param->name,
1024                                         DISCOVERY, NORMAL);
1025                         return -1;
1026                 }
1027         }
1028
1029         return 0;
1030 }
1031
1032 /*
1033  *      This function is used to pick a value range number,  currently just
1034  *      returns the lesser of both right values.
1035  */
1036 static char *iscsi_get_value_from_number_range(
1037         struct iscsi_param *param,
1038         char *value)
1039 {
1040         char *end_ptr, *tilde_ptr1 = NULL, *tilde_ptr2 = NULL;
1041         u32 acceptor_right_value, proposer_right_value;
1042
1043         tilde_ptr1 = strchr(value, '~');
1044         if (!tilde_ptr1)
1045                 return NULL;
1046         *tilde_ptr1++ = '\0';
1047         proposer_right_value = simple_strtoul(tilde_ptr1, &end_ptr, 0);
1048
1049         tilde_ptr2 = strchr(param->value, '~');
1050         if (!tilde_ptr2)
1051                 return NULL;
1052         *tilde_ptr2++ = '\0';
1053         acceptor_right_value = simple_strtoul(tilde_ptr2, &end_ptr, 0);
1054
1055         return (acceptor_right_value >= proposer_right_value) ?
1056                 tilde_ptr1 : tilde_ptr2;
1057 }
1058
1059 static char *iscsi_check_valuelist_for_support(
1060         struct iscsi_param *param,
1061         char *value)
1062 {
1063         char *tmp1 = NULL, *tmp2 = NULL;
1064         char *acceptor_values = NULL, *proposer_values = NULL;
1065
1066         acceptor_values = param->value;
1067         proposer_values = value;
1068
1069         do {
1070                 if (!proposer_values)
1071                         return NULL;
1072                 tmp1 = strchr(proposer_values, ',');
1073                 if (tmp1)
1074                         *tmp1 = '\0';
1075                 acceptor_values = param->value;
1076                 do {
1077                         if (!acceptor_values) {
1078                                 if (tmp1)
1079                                         *tmp1 = ',';
1080                                 return NULL;
1081                         }
1082                         tmp2 = strchr(acceptor_values, ',');
1083                         if (tmp2)
1084                                 *tmp2 = '\0';
1085                         if (!strcmp(acceptor_values, proposer_values)) {
1086                                 if (tmp2)
1087                                         *tmp2 = ',';
1088                                 goto out;
1089                         }
1090                         if (tmp2)
1091                                 *tmp2++ = ',';
1092
1093                         acceptor_values = tmp2;
1094                 } while (acceptor_values);
1095                 if (tmp1)
1096                         *tmp1++ = ',';
1097                 proposer_values = tmp1;
1098         } while (proposer_values);
1099
1100 out:
1101         return proposer_values;
1102 }
1103
1104 static int iscsi_check_acceptor_state(struct iscsi_param *param, char *value,
1105                                 struct iscsi_conn *conn)
1106 {
1107         u8 acceptor_boolean_value = 0, proposer_boolean_value = 0;
1108         char *negoitated_value = NULL;
1109
1110         if (IS_PSTATE_ACCEPTOR(param)) {
1111                 pr_err("Received key \"%s\" twice, protocol error.\n",
1112                                 param->name);
1113                 return -1;
1114         }
1115
1116         if (IS_PSTATE_REJECT(param))
1117                 return 0;
1118
1119         if (IS_TYPE_BOOL_AND(param)) {
1120                 if (!strcmp(value, YES))
1121                         proposer_boolean_value = 1;
1122                 if (!strcmp(param->value, YES))
1123                         acceptor_boolean_value = 1;
1124                 if (acceptor_boolean_value && proposer_boolean_value)
1125                         do {} while (0);
1126                 else {
1127                         if (iscsi_update_param_value(param, NO) < 0)
1128                                 return -1;
1129                         if (!proposer_boolean_value)
1130                                 SET_PSTATE_REPLY_OPTIONAL(param);
1131                 }
1132         } else if (IS_TYPE_BOOL_OR(param)) {
1133                 if (!strcmp(value, YES))
1134                         proposer_boolean_value = 1;
1135                 if (!strcmp(param->value, YES))
1136                         acceptor_boolean_value = 1;
1137                 if (acceptor_boolean_value || proposer_boolean_value) {
1138                         if (iscsi_update_param_value(param, YES) < 0)
1139                                 return -1;
1140                         if (proposer_boolean_value)
1141                                 SET_PSTATE_REPLY_OPTIONAL(param);
1142                 }
1143         } else if (IS_TYPE_NUMBER(param)) {
1144                 char *tmpptr, buf[11];
1145                 u32 acceptor_value = simple_strtoul(param->value, &tmpptr, 0);
1146                 u32 proposer_value = simple_strtoul(value, &tmpptr, 0);
1147
1148                 memset(buf, 0, sizeof(buf));
1149
1150                 if (!strcmp(param->name, MAXCONNECTIONS) ||
1151                     !strcmp(param->name, MAXBURSTLENGTH) ||
1152                     !strcmp(param->name, FIRSTBURSTLENGTH) ||
1153                     !strcmp(param->name, MAXOUTSTANDINGR2T) ||
1154                     !strcmp(param->name, DEFAULTTIME2RETAIN) ||
1155                     !strcmp(param->name, ERRORRECOVERYLEVEL)) {
1156                         if (proposer_value > acceptor_value) {
1157                                 sprintf(buf, "%u", acceptor_value);
1158                                 if (iscsi_update_param_value(param,
1159                                                 &buf[0]) < 0)
1160                                         return -1;
1161                         } else {
1162                                 if (iscsi_update_param_value(param, value) < 0)
1163                                         return -1;
1164                         }
1165                 } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) {
1166                         if (acceptor_value > proposer_value) {
1167                                 sprintf(buf, "%u", acceptor_value);
1168                                 if (iscsi_update_param_value(param,
1169                                                 &buf[0]) < 0)
1170                                         return -1;
1171                         } else {
1172                                 if (iscsi_update_param_value(param, value) < 0)
1173                                         return -1;
1174                         }
1175                 } else {
1176                         if (iscsi_update_param_value(param, value) < 0)
1177                                 return -1;
1178                 }
1179
1180                 if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) {
1181                         struct iscsi_param *param_mxdsl;
1182                         unsigned long long tmp;
1183                         int rc;
1184
1185                         rc = strict_strtoull(param->value, 0, &tmp);
1186                         if (rc < 0)
1187                                 return -1;
1188
1189                         conn->conn_ops->MaxRecvDataSegmentLength = tmp;
1190                         pr_debug("Saving op->MaxRecvDataSegmentLength from"
1191                                 " original initiator received value: %u\n",
1192                                 conn->conn_ops->MaxRecvDataSegmentLength);
1193
1194                         param_mxdsl = iscsi_find_param_from_key(
1195                                                 MAXXMITDATASEGMENTLENGTH,
1196                                                 conn->param_list);
1197                         if (!param_mxdsl)
1198                                 return -1;
1199
1200                         rc = iscsi_update_param_value(param,
1201                                                 param_mxdsl->value);
1202                         if (rc < 0)
1203                                 return -1;
1204
1205                         pr_debug("Updated %s to target MXDSL value: %s\n",
1206                                         param->name, param->value);
1207                 }
1208
1209         } else if (IS_TYPE_NUMBER_RANGE(param)) {
1210                 negoitated_value = iscsi_get_value_from_number_range(
1211                                         param, value);
1212                 if (!negoitated_value)
1213                         return -1;
1214                 if (iscsi_update_param_value(param, negoitated_value) < 0)
1215                         return -1;
1216         } else if (IS_TYPE_VALUE_LIST(param)) {
1217                 negoitated_value = iscsi_check_valuelist_for_support(
1218                                         param, value);
1219                 if (!negoitated_value) {
1220                         pr_err("Proposer's value list \"%s\" contains"
1221                                 " no valid values from Acceptor's value list"
1222                                 " \"%s\".\n", value, param->value);
1223                         return -1;
1224                 }
1225                 if (iscsi_update_param_value(param, negoitated_value) < 0)
1226                         return -1;
1227         } else if (IS_PHASE_DECLARATIVE(param)) {
1228                 if (iscsi_update_param_value(param, value) < 0)
1229                         return -1;
1230                 SET_PSTATE_REPLY_OPTIONAL(param);
1231         }
1232
1233         return 0;
1234 }
1235
1236 static int iscsi_check_proposer_state(struct iscsi_param *param, char *value)
1237 {
1238         if (IS_PSTATE_RESPONSE_GOT(param)) {
1239                 pr_err("Received key \"%s\" twice, protocol error.\n",
1240                                 param->name);
1241                 return -1;
1242         }
1243
1244         if (IS_TYPE_NUMBER_RANGE(param)) {
1245                 u32 left_val = 0, right_val = 0, recieved_value = 0;
1246                 char *left_val_ptr = NULL, *right_val_ptr = NULL;
1247                 char *tilde_ptr = NULL;
1248
1249                 if (!strcmp(value, IRRELEVANT) || !strcmp(value, REJECT)) {
1250                         if (iscsi_update_param_value(param, value) < 0)
1251                                 return -1;
1252                         return 0;
1253                 }
1254
1255                 tilde_ptr = strchr(value, '~');
1256                 if (tilde_ptr) {
1257                         pr_err("Illegal \"~\" in response for \"%s\".\n",
1258                                         param->name);
1259                         return -1;
1260                 }
1261                 tilde_ptr = strchr(param->value, '~');
1262                 if (!tilde_ptr) {
1263                         pr_err("Unable to locate numerical range"
1264                                 " indicator \"~\" for \"%s\".\n", param->name);
1265                         return -1;
1266                 }
1267                 *tilde_ptr = '\0';
1268
1269                 left_val_ptr = param->value;
1270                 right_val_ptr = param->value + strlen(left_val_ptr) + 1;
1271                 left_val = simple_strtoul(left_val_ptr, NULL, 0);
1272                 right_val = simple_strtoul(right_val_ptr, NULL, 0);
1273                 recieved_value = simple_strtoul(value, NULL, 0);
1274
1275                 *tilde_ptr = '~';
1276
1277                 if ((recieved_value < left_val) ||
1278                     (recieved_value > right_val)) {
1279                         pr_err("Illegal response \"%s=%u\", value must"
1280                                 " be between %u and %u.\n", param->name,
1281                                 recieved_value, left_val, right_val);
1282                         return -1;
1283                 }
1284         } else if (IS_TYPE_VALUE_LIST(param)) {
1285                 char *comma_ptr = NULL, *tmp_ptr = NULL;
1286
1287                 comma_ptr = strchr(value, ',');
1288                 if (comma_ptr) {
1289                         pr_err("Illegal \",\" in response for \"%s\".\n",
1290                                         param->name);
1291                         return -1;
1292                 }
1293
1294                 tmp_ptr = iscsi_check_valuelist_for_support(param, value);
1295                 if (!tmp_ptr)
1296                         return -1;
1297         }
1298
1299         if (iscsi_update_param_value(param, value) < 0)
1300                 return -1;
1301
1302         return 0;
1303 }
1304
1305 static int iscsi_check_value(struct iscsi_param *param, char *value)
1306 {
1307         char *comma_ptr = NULL;
1308
1309         if (!strcmp(value, REJECT)) {
1310                 if (!strcmp(param->name, IFMARKINT) ||
1311                     !strcmp(param->name, OFMARKINT)) {
1312                         /*
1313                          * Reject is not fatal for [I,O]FMarkInt,  and causes
1314                          * [I,O]FMarker to be reset to No. (See iSCSI v20 A.3.2)
1315                          */
1316                         SET_PSTATE_REJECT(param);
1317                         return 0;
1318                 }
1319                 pr_err("Received %s=%s\n", param->name, value);
1320                 return -1;
1321         }
1322         if (!strcmp(value, IRRELEVANT)) {
1323                 pr_debug("Received %s=%s\n", param->name, value);
1324                 SET_PSTATE_IRRELEVANT(param);
1325                 return 0;
1326         }
1327         if (!strcmp(value, NOTUNDERSTOOD)) {
1328                 if (!IS_PSTATE_PROPOSER(param)) {
1329                         pr_err("Received illegal offer %s=%s\n",
1330                                 param->name, value);
1331                         return -1;
1332                 }
1333
1334 /* #warning FIXME: Add check for X-ExtensionKey here */
1335                 pr_err("Standard iSCSI key \"%s\" cannot be answered"
1336                         " with \"%s\", protocol error.\n", param->name, value);
1337                 return -1;
1338         }
1339
1340         do {
1341                 comma_ptr = NULL;
1342                 comma_ptr = strchr(value, ',');
1343
1344                 if (comma_ptr && !IS_TYPE_VALUE_LIST(param)) {
1345                         pr_err("Detected value separator \",\", but"
1346                                 " key \"%s\" does not allow a value list,"
1347                                 " protocol error.\n", param->name);
1348                         return -1;
1349                 }
1350                 if (comma_ptr)
1351                         *comma_ptr = '\0';
1352
1353                 if (strlen(value) > VALUE_MAXLEN) {
1354                         pr_err("Value for key \"%s\" exceeds %d,"
1355                                 " protocol error.\n", param->name,
1356                                 VALUE_MAXLEN);
1357                         return -1;
1358                 }
1359
1360                 if (IS_TYPE_BOOL_AND(param) || IS_TYPE_BOOL_OR(param)) {
1361                         if (iscsi_check_boolean_value(param, value) < 0)
1362                                 return -1;
1363                 } else if (IS_TYPE_NUMBER(param)) {
1364                         if (iscsi_check_numerical_value(param, value) < 0)
1365                                 return -1;
1366                 } else if (IS_TYPE_NUMBER_RANGE(param)) {
1367                         if (iscsi_check_numerical_range_value(param, value) < 0)
1368                                 return -1;
1369                 } else if (IS_TYPE_STRING(param) || IS_TYPE_VALUE_LIST(param)) {
1370                         if (iscsi_check_string_or_list_value(param, value) < 0)
1371                                 return -1;
1372                 } else {
1373                         pr_err("Huh? 0x%02x\n", param->type);
1374                         return -1;
1375                 }
1376
1377                 if (comma_ptr)
1378                         *comma_ptr++ = ',';
1379
1380                 value = comma_ptr;
1381         } while (value);
1382
1383         return 0;
1384 }
1385
1386 static struct iscsi_param *__iscsi_check_key(
1387         char *key,
1388         int sender,
1389         struct iscsi_param_list *param_list)
1390 {
1391         struct iscsi_param *param;
1392
1393         if (strlen(key) > KEY_MAXLEN) {
1394                 pr_err("Length of key name \"%s\" exceeds %d.\n",
1395                         key, KEY_MAXLEN);
1396                 return NULL;
1397         }
1398
1399         param = iscsi_find_param_from_key(key, param_list);
1400         if (!param)
1401                 return NULL;
1402
1403         if ((sender & SENDER_INITIATOR) && !IS_SENDER_INITIATOR(param)) {
1404                 pr_err("Key \"%s\" may not be sent to %s,"
1405                         " protocol error.\n", param->name,
1406                         (sender & SENDER_RECEIVER) ? "target" : "initiator");
1407                 return NULL;
1408         }
1409
1410         if ((sender & SENDER_TARGET) && !IS_SENDER_TARGET(param)) {
1411                 pr_err("Key \"%s\" may not be sent to %s,"
1412                         " protocol error.\n", param->name,
1413                         (sender & SENDER_RECEIVER) ? "initiator" : "target");
1414                 return NULL;
1415         }
1416
1417         return param;
1418 }
1419
1420 static struct iscsi_param *iscsi_check_key(
1421         char *key,
1422         int phase,
1423         int sender,
1424         struct iscsi_param_list *param_list)
1425 {
1426         struct iscsi_param *param;
1427         /*
1428          * Key name length must not exceed 63 bytes. (See iSCSI v20 5.1)
1429          */
1430         if (strlen(key) > KEY_MAXLEN) {
1431                 pr_err("Length of key name \"%s\" exceeds %d.\n",
1432                         key, KEY_MAXLEN);
1433                 return NULL;
1434         }
1435
1436         param = iscsi_find_param_from_key(key, param_list);
1437         if (!param)
1438                 return NULL;
1439
1440         if ((sender & SENDER_INITIATOR) && !IS_SENDER_INITIATOR(param)) {
1441                 pr_err("Key \"%s\" may not be sent to %s,"
1442                         " protocol error.\n", param->name,
1443                         (sender & SENDER_RECEIVER) ? "target" : "initiator");
1444                 return NULL;
1445         }
1446         if ((sender & SENDER_TARGET) && !IS_SENDER_TARGET(param)) {
1447                 pr_err("Key \"%s\" may not be sent to %s,"
1448                                 " protocol error.\n", param->name,
1449                         (sender & SENDER_RECEIVER) ? "initiator" : "target");
1450                 return NULL;
1451         }
1452
1453         if (IS_PSTATE_ACCEPTOR(param)) {
1454                 pr_err("Key \"%s\" received twice, protocol error.\n",
1455                                 key);
1456                 return NULL;
1457         }
1458
1459         if (!phase)
1460                 return param;
1461
1462         if (!(param->phase & phase)) {
1463                 pr_err("Key \"%s\" may not be negotiated during ",
1464                                 param->name);
1465                 switch (phase) {
1466                 case PHASE_SECURITY:
1467                         pr_debug("Security phase.\n");
1468                         break;
1469                 case PHASE_OPERATIONAL:
1470                         pr_debug("Operational phase.\n");
1471                         break;
1472                 default:
1473                         pr_debug("Unknown phase.\n");
1474                 }
1475                 return NULL;
1476         }
1477
1478         return param;
1479 }
1480
1481 static int iscsi_enforce_integrity_rules(
1482         u8 phase,
1483         struct iscsi_param_list *param_list)
1484 {
1485         char *tmpptr;
1486         u8 DataSequenceInOrder = 0;
1487         u8 ErrorRecoveryLevel = 0, SessionType = 0;
1488         u8 IFMarker = 0, OFMarker = 0;
1489         u8 IFMarkInt_Reject = 1, OFMarkInt_Reject = 1;
1490         u32 FirstBurstLength = 0, MaxBurstLength = 0;
1491         struct iscsi_param *param = NULL;
1492
1493         list_for_each_entry(param, &param_list->param_list, p_list) {
1494                 if (!(param->phase & phase))
1495                         continue;
1496                 if (!strcmp(param->name, SESSIONTYPE))
1497                         if (!strcmp(param->value, NORMAL))
1498                                 SessionType = 1;
1499                 if (!strcmp(param->name, ERRORRECOVERYLEVEL))
1500                         ErrorRecoveryLevel = simple_strtoul(param->value,
1501                                         &tmpptr, 0);
1502                 if (!strcmp(param->name, DATASEQUENCEINORDER))
1503                         if (!strcmp(param->value, YES))
1504                                 DataSequenceInOrder = 1;
1505                 if (!strcmp(param->name, MAXBURSTLENGTH))
1506                         MaxBurstLength = simple_strtoul(param->value,
1507                                         &tmpptr, 0);
1508                 if (!strcmp(param->name, IFMARKER))
1509                         if (!strcmp(param->value, YES))
1510                                 IFMarker = 1;
1511                 if (!strcmp(param->name, OFMARKER))
1512                         if (!strcmp(param->value, YES))
1513                                 OFMarker = 1;
1514                 if (!strcmp(param->name, IFMARKINT))
1515                         if (!strcmp(param->value, REJECT))
1516                                 IFMarkInt_Reject = 1;
1517                 if (!strcmp(param->name, OFMARKINT))
1518                         if (!strcmp(param->value, REJECT))
1519                                 OFMarkInt_Reject = 1;
1520         }
1521
1522         list_for_each_entry(param, &param_list->param_list, p_list) {
1523                 if (!(param->phase & phase))
1524                         continue;
1525                 if (!SessionType && (!IS_PSTATE_ACCEPTOR(param) &&
1526                      (strcmp(param->name, IFMARKER) &&
1527                       strcmp(param->name, OFMARKER) &&
1528                       strcmp(param->name, IFMARKINT) &&
1529                       strcmp(param->name, OFMARKINT))))
1530                         continue;
1531                 if (!strcmp(param->name, MAXOUTSTANDINGR2T) &&
1532                     DataSequenceInOrder && (ErrorRecoveryLevel > 0)) {
1533                         if (strcmp(param->value, "1")) {
1534                                 if (iscsi_update_param_value(param, "1") < 0)
1535                                         return -1;
1536                                 pr_debug("Reset \"%s\" to \"%s\".\n",
1537                                         param->name, param->value);
1538                         }
1539                 }
1540                 if (!strcmp(param->name, MAXCONNECTIONS) && !SessionType) {
1541                         if (strcmp(param->value, "1")) {
1542                                 if (iscsi_update_param_value(param, "1") < 0)
1543                                         return -1;
1544                                 pr_debug("Reset \"%s\" to \"%s\".\n",
1545                                         param->name, param->value);
1546                         }
1547                 }
1548                 if (!strcmp(param->name, FIRSTBURSTLENGTH)) {
1549                         FirstBurstLength = simple_strtoul(param->value,
1550                                         &tmpptr, 0);
1551                         if (FirstBurstLength > MaxBurstLength) {
1552                                 char tmpbuf[11];
1553                                 memset(tmpbuf, 0, sizeof(tmpbuf));
1554                                 sprintf(tmpbuf, "%u", MaxBurstLength);
1555                                 if (iscsi_update_param_value(param, tmpbuf))
1556                                         return -1;
1557                                 pr_debug("Reset \"%s\" to \"%s\".\n",
1558                                         param->name, param->value);
1559                         }
1560                 }
1561                 if (!strcmp(param->name, IFMARKER) && IFMarkInt_Reject) {
1562                         if (iscsi_update_param_value(param, NO) < 0)
1563                                 return -1;
1564                         IFMarker = 0;
1565                         pr_debug("Reset \"%s\" to \"%s\".\n",
1566                                         param->name, param->value);
1567                 }
1568                 if (!strcmp(param->name, OFMARKER) && OFMarkInt_Reject) {
1569                         if (iscsi_update_param_value(param, NO) < 0)
1570                                 return -1;
1571                         OFMarker = 0;
1572                         pr_debug("Reset \"%s\" to \"%s\".\n",
1573                                          param->name, param->value);
1574                 }
1575                 if (!strcmp(param->name, IFMARKINT) && !IFMarker) {
1576                         if (!strcmp(param->value, REJECT))
1577                                 continue;
1578                         param->state &= ~PSTATE_NEGOTIATE;
1579                         if (iscsi_update_param_value(param, IRRELEVANT) < 0)
1580                                 return -1;
1581                         pr_debug("Reset \"%s\" to \"%s\".\n",
1582                                         param->name, param->value);
1583                 }
1584                 if (!strcmp(param->name, OFMARKINT) && !OFMarker) {
1585                         if (!strcmp(param->value, REJECT))
1586                                 continue;
1587                         param->state &= ~PSTATE_NEGOTIATE;
1588                         if (iscsi_update_param_value(param, IRRELEVANT) < 0)
1589                                 return -1;
1590                         pr_debug("Reset \"%s\" to \"%s\".\n",
1591                                         param->name, param->value);
1592                 }
1593         }
1594
1595         return 0;
1596 }
1597
1598 int iscsi_decode_text_input(
1599         u8 phase,
1600         u8 sender,
1601         char *textbuf,
1602         u32 length,
1603         struct iscsi_conn *conn)
1604 {
1605         struct iscsi_param_list *param_list = conn->param_list;
1606         char *tmpbuf, *start = NULL, *end = NULL;
1607
1608         tmpbuf = kzalloc(length + 1, GFP_KERNEL);
1609         if (!tmpbuf) {
1610                 pr_err("Unable to allocate memory for tmpbuf.\n");
1611                 return -1;
1612         }
1613
1614         memcpy(tmpbuf, textbuf, length);
1615         tmpbuf[length] = '\0';
1616         start = tmpbuf;
1617         end = (start + length);
1618
1619         while (start < end) {
1620                 char *key, *value;
1621                 struct iscsi_param *param;
1622
1623                 if (iscsi_extract_key_value(start, &key, &value) < 0) {
1624                         kfree(tmpbuf);
1625                         return -1;
1626                 }
1627
1628                 pr_debug("Got key: %s=%s\n", key, value);
1629
1630                 if (phase & PHASE_SECURITY) {
1631                         if (iscsi_check_for_auth_key(key) > 0) {
1632                                 char *tmpptr = key + strlen(key);
1633                                 *tmpptr = '=';
1634                                 kfree(tmpbuf);
1635                                 return 1;
1636                         }
1637                 }
1638
1639                 param = iscsi_check_key(key, phase, sender, param_list);
1640                 if (!param) {
1641                         if (iscsi_add_notunderstood_response(key,
1642                                         value, param_list) < 0) {
1643                                 kfree(tmpbuf);
1644                                 return -1;
1645                         }
1646                         start += strlen(key) + strlen(value) + 2;
1647                         continue;
1648                 }
1649                 if (iscsi_check_value(param, value) < 0) {
1650                         kfree(tmpbuf);
1651                         return -1;
1652                 }
1653
1654                 start += strlen(key) + strlen(value) + 2;
1655
1656                 if (IS_PSTATE_PROPOSER(param)) {
1657                         if (iscsi_check_proposer_state(param, value) < 0) {
1658                                 kfree(tmpbuf);
1659                                 return -1;
1660                         }
1661                         SET_PSTATE_RESPONSE_GOT(param);
1662                 } else {
1663                         if (iscsi_check_acceptor_state(param, value, conn) < 0) {
1664                                 kfree(tmpbuf);
1665                                 return -1;
1666                         }
1667                         SET_PSTATE_ACCEPTOR(param);
1668                 }
1669         }
1670
1671         kfree(tmpbuf);
1672         return 0;
1673 }
1674
1675 int iscsi_encode_text_output(
1676         u8 phase,
1677         u8 sender,
1678         char *textbuf,
1679         u32 *length,
1680         struct iscsi_param_list *param_list)
1681 {
1682         char *output_buf = NULL;
1683         struct iscsi_extra_response *er;
1684         struct iscsi_param *param;
1685
1686         output_buf = textbuf + *length;
1687
1688         if (iscsi_enforce_integrity_rules(phase, param_list) < 0)
1689                 return -1;
1690
1691         list_for_each_entry(param, &param_list->param_list, p_list) {
1692                 if (!(param->sender & sender))
1693                         continue;
1694                 if (IS_PSTATE_ACCEPTOR(param) &&
1695                     !IS_PSTATE_RESPONSE_SENT(param) &&
1696                     !IS_PSTATE_REPLY_OPTIONAL(param) &&
1697                     (param->phase & phase)) {
1698                         *length += sprintf(output_buf, "%s=%s",
1699                                 param->name, param->value);
1700                         *length += 1;
1701                         output_buf = textbuf + *length;
1702                         SET_PSTATE_RESPONSE_SENT(param);
1703                         pr_debug("Sending key: %s=%s\n",
1704                                 param->name, param->value);
1705                         continue;
1706                 }
1707                 if (IS_PSTATE_NEGOTIATE(param) &&
1708                     !IS_PSTATE_ACCEPTOR(param) &&
1709                     !IS_PSTATE_PROPOSER(param) &&
1710                     (param->phase & phase)) {
1711                         *length += sprintf(output_buf, "%s=%s",
1712                                 param->name, param->value);
1713                         *length += 1;
1714                         output_buf = textbuf + *length;
1715                         SET_PSTATE_PROPOSER(param);
1716                         iscsi_check_proposer_for_optional_reply(param);
1717                         pr_debug("Sending key: %s=%s\n",
1718                                 param->name, param->value);
1719                 }
1720         }
1721
1722         list_for_each_entry(er, &param_list->extra_response_list, er_list) {
1723                 *length += sprintf(output_buf, "%s=%s", er->key, er->value);
1724                 *length += 1;
1725                 output_buf = textbuf + *length;
1726                 pr_debug("Sending key: %s=%s\n", er->key, er->value);
1727         }
1728         iscsi_release_extra_responses(param_list);
1729
1730         return 0;
1731 }
1732
1733 int iscsi_check_negotiated_keys(struct iscsi_param_list *param_list)
1734 {
1735         int ret = 0;
1736         struct iscsi_param *param;
1737
1738         list_for_each_entry(param, &param_list->param_list, p_list) {
1739                 if (IS_PSTATE_NEGOTIATE(param) &&
1740                     IS_PSTATE_PROPOSER(param) &&
1741                     !IS_PSTATE_RESPONSE_GOT(param) &&
1742                     !IS_PSTATE_REPLY_OPTIONAL(param) &&
1743                     !IS_PHASE_DECLARATIVE(param)) {
1744                         pr_err("No response for proposed key \"%s\".\n",
1745                                         param->name);
1746                         ret = -1;
1747                 }
1748         }
1749
1750         return ret;
1751 }
1752
1753 int iscsi_change_param_value(
1754         char *keyvalue,
1755         struct iscsi_param_list *param_list,
1756         int check_key)
1757 {
1758         char *key = NULL, *value = NULL;
1759         struct iscsi_param *param;
1760         int sender = 0;
1761
1762         if (iscsi_extract_key_value(keyvalue, &key, &value) < 0)
1763                 return -1;
1764
1765         if (!check_key) {
1766                 param = __iscsi_check_key(keyvalue, sender, param_list);
1767                 if (!param)
1768                         return -1;
1769         } else {
1770                 param = iscsi_check_key(keyvalue, 0, sender, param_list);
1771                 if (!param)
1772                         return -1;
1773
1774                 param->set_param = 1;
1775                 if (iscsi_check_value(param, value) < 0) {
1776                         param->set_param = 0;
1777                         return -1;
1778                 }
1779                 param->set_param = 0;
1780         }
1781
1782         if (iscsi_update_param_value(param, value) < 0)
1783                 return -1;
1784
1785         return 0;
1786 }
1787
1788 void iscsi_set_connection_parameters(
1789         struct iscsi_conn_ops *ops,
1790         struct iscsi_param_list *param_list)
1791 {
1792         char *tmpptr;
1793         struct iscsi_param *param;
1794
1795         pr_debug("---------------------------------------------------"
1796                         "---------------\n");
1797         list_for_each_entry(param, &param_list->param_list, p_list) {
1798                 /*
1799                  * Special case to set MAXXMITDATASEGMENTLENGTH from the
1800                  * target requested MaxRecvDataSegmentLength, even though
1801                  * this key is not sent over the wire.
1802                  */
1803                 if (!strcmp(param->name, MAXXMITDATASEGMENTLENGTH)) {
1804                         if (param_list->iser == true)
1805                                 continue;
1806
1807                         ops->MaxXmitDataSegmentLength =
1808                                 simple_strtoul(param->value, &tmpptr, 0);
1809                         pr_debug("MaxXmitDataSegmentLength:     %s\n",
1810                                 param->value);
1811                 }
1812
1813                 if (!IS_PSTATE_ACCEPTOR(param) && !IS_PSTATE_PROPOSER(param))
1814                         continue;
1815                 if (!strcmp(param->name, AUTHMETHOD)) {
1816                         pr_debug("AuthMethod:                   %s\n",
1817                                 param->value);
1818                 } else if (!strcmp(param->name, HEADERDIGEST)) {
1819                         ops->HeaderDigest = !strcmp(param->value, CRC32C);
1820                         pr_debug("HeaderDigest:                 %s\n",
1821                                 param->value);
1822                 } else if (!strcmp(param->name, DATADIGEST)) {
1823                         ops->DataDigest = !strcmp(param->value, CRC32C);
1824                         pr_debug("DataDigest:                   %s\n",
1825                                 param->value);
1826                 } else if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) {
1827                         /*
1828                          * At this point iscsi_check_acceptor_state() will have
1829                          * set ops->MaxRecvDataSegmentLength from the original
1830                          * initiator provided value.
1831                          */
1832                         pr_debug("MaxRecvDataSegmentLength:     %u\n",
1833                                 ops->MaxRecvDataSegmentLength);
1834                 } else if (!strcmp(param->name, OFMARKER)) {
1835                         ops->OFMarker = !strcmp(param->value, YES);
1836                         pr_debug("OFMarker:                     %s\n",
1837                                 param->value);
1838                 } else if (!strcmp(param->name, IFMARKER)) {
1839                         ops->IFMarker = !strcmp(param->value, YES);
1840                         pr_debug("IFMarker:                     %s\n",
1841                                 param->value);
1842                 } else if (!strcmp(param->name, OFMARKINT)) {
1843                         ops->OFMarkInt =
1844                                 simple_strtoul(param->value, &tmpptr, 0);
1845                         pr_debug("OFMarkInt:                    %s\n",
1846                                 param->value);
1847                 } else if (!strcmp(param->name, IFMARKINT)) {
1848                         ops->IFMarkInt =
1849                                 simple_strtoul(param->value, &tmpptr, 0);
1850                         pr_debug("IFMarkInt:                    %s\n",
1851                                 param->value);
1852                 } else if (!strcmp(param->name, INITIATORRECVDATASEGMENTLENGTH)) {
1853                         ops->InitiatorRecvDataSegmentLength =
1854                                 simple_strtoul(param->value, &tmpptr, 0);
1855                         pr_debug("InitiatorRecvDataSegmentLength: %s\n",
1856                                 param->value);
1857                         ops->MaxRecvDataSegmentLength =
1858                                         ops->InitiatorRecvDataSegmentLength;
1859                         pr_debug("Set MRDSL from InitiatorRecvDataSegmentLength\n");
1860                 } else if (!strcmp(param->name, TARGETRECVDATASEGMENTLENGTH)) {
1861                         ops->TargetRecvDataSegmentLength =
1862                                 simple_strtoul(param->value, &tmpptr, 0);
1863                         pr_debug("TargetRecvDataSegmentLength:  %s\n",
1864                                 param->value);
1865                         ops->MaxXmitDataSegmentLength =
1866                                         ops->TargetRecvDataSegmentLength;
1867                         pr_debug("Set MXDSL from TargetRecvDataSegmentLength\n");
1868                 }
1869         }
1870         pr_debug("----------------------------------------------------"
1871                         "--------------\n");
1872 }
1873
1874 void iscsi_set_session_parameters(
1875         struct iscsi_sess_ops *ops,
1876         struct iscsi_param_list *param_list,
1877         int leading)
1878 {
1879         char *tmpptr;
1880         struct iscsi_param *param;
1881
1882         pr_debug("----------------------------------------------------"
1883                         "--------------\n");
1884         list_for_each_entry(param, &param_list->param_list, p_list) {
1885                 if (!IS_PSTATE_ACCEPTOR(param) && !IS_PSTATE_PROPOSER(param))
1886                         continue;
1887                 if (!strcmp(param->name, INITIATORNAME)) {
1888                         if (!param->value)
1889                                 continue;
1890                         if (leading)
1891                                 snprintf(ops->InitiatorName,
1892                                                 sizeof(ops->InitiatorName),
1893                                                 "%s", param->value);
1894                         pr_debug("InitiatorName:                %s\n",
1895                                 param->value);
1896                 } else if (!strcmp(param->name, INITIATORALIAS)) {
1897                         if (!param->value)
1898                                 continue;
1899                         snprintf(ops->InitiatorAlias,
1900                                                 sizeof(ops->InitiatorAlias),
1901                                                 "%s", param->value);
1902                         pr_debug("InitiatorAlias:               %s\n",
1903                                 param->value);
1904                 } else if (!strcmp(param->name, TARGETNAME)) {
1905                         if (!param->value)
1906                                 continue;
1907                         if (leading)
1908                                 snprintf(ops->TargetName,
1909                                                 sizeof(ops->TargetName),
1910                                                 "%s", param->value);
1911                         pr_debug("TargetName:                   %s\n",
1912                                 param->value);
1913                 } else if (!strcmp(param->name, TARGETALIAS)) {
1914                         if (!param->value)
1915                                 continue;
1916                         snprintf(ops->TargetAlias, sizeof(ops->TargetAlias),
1917                                         "%s", param->value);
1918                         pr_debug("TargetAlias:                  %s\n",
1919                                 param->value);
1920                 } else if (!strcmp(param->name, TARGETPORTALGROUPTAG)) {
1921                         ops->TargetPortalGroupTag =
1922                                 simple_strtoul(param->value, &tmpptr, 0);
1923                         pr_debug("TargetPortalGroupTag:         %s\n",
1924                                 param->value);
1925                 } else if (!strcmp(param->name, MAXCONNECTIONS)) {
1926                         ops->MaxConnections =
1927                                 simple_strtoul(param->value, &tmpptr, 0);
1928                         pr_debug("MaxConnections:               %s\n",
1929                                 param->value);
1930                 } else if (!strcmp(param->name, INITIALR2T)) {
1931                         ops->InitialR2T = !strcmp(param->value, YES);
1932                          pr_debug("InitialR2T:                   %s\n",
1933                                 param->value);
1934                 } else if (!strcmp(param->name, IMMEDIATEDATA)) {
1935                         ops->ImmediateData = !strcmp(param->value, YES);
1936                         pr_debug("ImmediateData:                %s\n",
1937                                 param->value);
1938                 } else if (!strcmp(param->name, MAXBURSTLENGTH)) {
1939                         ops->MaxBurstLength =
1940                                 simple_strtoul(param->value, &tmpptr, 0);
1941                         pr_debug("MaxBurstLength:               %s\n",
1942                                 param->value);
1943                 } else if (!strcmp(param->name, FIRSTBURSTLENGTH)) {
1944                         ops->FirstBurstLength =
1945                                 simple_strtoul(param->value, &tmpptr, 0);
1946                         pr_debug("FirstBurstLength:             %s\n",
1947                                 param->value);
1948                 } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) {
1949                         ops->DefaultTime2Wait =
1950                                 simple_strtoul(param->value, &tmpptr, 0);
1951                         pr_debug("DefaultTime2Wait:             %s\n",
1952                                 param->value);
1953                 } else if (!strcmp(param->name, DEFAULTTIME2RETAIN)) {
1954                         ops->DefaultTime2Retain =
1955                                 simple_strtoul(param->value, &tmpptr, 0);
1956                         pr_debug("DefaultTime2Retain:           %s\n",
1957                                 param->value);
1958                 } else if (!strcmp(param->name, MAXOUTSTANDINGR2T)) {
1959                         ops->MaxOutstandingR2T =
1960                                 simple_strtoul(param->value, &tmpptr, 0);
1961                         pr_debug("MaxOutstandingR2T:            %s\n",
1962                                 param->value);
1963                 } else if (!strcmp(param->name, DATAPDUINORDER)) {
1964                         ops->DataPDUInOrder = !strcmp(param->value, YES);
1965                         pr_debug("DataPDUInOrder:               %s\n",
1966                                 param->value);
1967                 } else if (!strcmp(param->name, DATASEQUENCEINORDER)) {
1968                         ops->DataSequenceInOrder = !strcmp(param->value, YES);
1969                         pr_debug("DataSequenceInOrder:          %s\n",
1970                                 param->value);
1971                 } else if (!strcmp(param->name, ERRORRECOVERYLEVEL)) {
1972                         ops->ErrorRecoveryLevel =
1973                                 simple_strtoul(param->value, &tmpptr, 0);
1974                         pr_debug("ErrorRecoveryLevel:           %s\n",
1975                                 param->value);
1976                 } else if (!strcmp(param->name, SESSIONTYPE)) {
1977                         ops->SessionType = !strcmp(param->value, DISCOVERY);
1978                         pr_debug("SessionType:                  %s\n",
1979                                 param->value);
1980                 } else if (!strcmp(param->name, RDMAEXTENTIONS)) {
1981                         ops->RDMAExtensions = !strcmp(param->value, YES);
1982                         pr_debug("RDMAExtensions:               %s\n",
1983                                 param->value);
1984                 }
1985         }
1986         pr_debug("----------------------------------------------------"
1987                         "--------------\n");
1988
1989 }