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;
  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         iov[1].iov_len          = text_length;
  71         iov[1].iov_base         = text_buf;
  72
  73         /*
  74          * Initial Marker-less Interval.
  75          * Add the values regardless of IFMarker/OFMarker, considering
  76          * it may not be negoitated yet.
  77          */
  78         conn->if_marker += length;
  79
  80         tx_sent = tx_data(conn, &iov[0], 2, length);
  81         if (tx_sent != length) {
  82                 pr_err("tx_data returned %d, expecting %d.\n",
  83                                 tx_sent, length);
  84                 return -1;
  85         }
  86
  87         return 0;
  88 }
  89
  90 void iscsi_dump_conn_ops(struct iscsi_conn_ops *conn_ops)
  91 {
  92         pr_debug("HeaderDigest: %s\n", (conn_ops->HeaderDigest) ?
  93                                 "CRC32C" : "None");
  94         pr_debug("DataDigest: %s\n", (conn_ops->DataDigest) ?
  95                                 "CRC32C" : "None");
  96         pr_debug("MaxRecvDataSegmentLength: %u\n",
  97                                 conn_ops->MaxRecvDataSegmentLength);
  98         pr_debug("OFMarker: %s\n", (conn_ops->OFMarker) ? "Yes" : "No");
  99         pr_debug("IFMarker: %s\n", (conn_ops->IFMarker) ? "Yes" : "No");
 100         if (conn_ops->OFMarker)
 101                 pr_debug("OFMarkInt: %u\n", conn_ops->OFMarkInt);
 102         if (conn_ops->IFMarker)
 103                 pr_debug("IFMarkInt: %u\n", conn_ops->IFMarkInt);
 104 }
 105
 106 void iscsi_dump_sess_ops(struct iscsi_sess_ops *sess_ops)
 107 {
 108         pr_debug("InitiatorName: %s\n", sess_ops->InitiatorName);
 109         pr_debug("InitiatorAlias: %s\n", sess_ops->InitiatorAlias);
 110         pr_debug("TargetName: %s\n", sess_ops->TargetName);
 111         pr_debug("TargetAlias: %s\n", sess_ops->TargetAlias);
 112         pr_debug("TargetPortalGroupTag: %hu\n",
 113                         sess_ops->TargetPortalGroupTag);
 114         pr_debug("MaxConnections: %hu\n", sess_ops->MaxConnections);
 115         pr_debug("InitialR2T: %s\n",
 116                         (sess_ops->InitialR2T) ? "Yes" : "No");
 117         pr_debug("ImmediateData: %s\n", (sess_ops->ImmediateData) ?
 118                         "Yes" : "No");
 119         pr_debug("MaxBurstLength: %u\n", sess_ops->MaxBurstLength);
 120         pr_debug("FirstBurstLength: %u\n", sess_ops->FirstBurstLength);
 121         pr_debug("DefaultTime2Wait: %hu\n", sess_ops->DefaultTime2Wait);
 122         pr_debug("DefaultTime2Retain: %hu\n",
 123                         sess_ops->DefaultTime2Retain);
 124         pr_debug("MaxOutstandingR2T: %hu\n",
 125                         sess_ops->MaxOutstandingR2T);
 126         pr_debug("DataPDUInOrder: %s\n",
 127                         (sess_ops->DataPDUInOrder) ? "Yes" : "No");
 128         pr_debug("DataSequenceInOrder: %s\n",
 129                         (sess_ops->DataSequenceInOrder) ? "Yes" : "No");
 130         pr_debug("ErrorRecoveryLevel: %hu\n",
 131                         sess_ops->ErrorRecoveryLevel);
 132         pr_debug("SessionType: %s\n", (sess_ops->SessionType) ?
 133                         "Discovery" : "Normal");
 134 }
 135
 136 void iscsi_print_params(struct iscsi_param_list *param_list)
 137 {
 138         struct iscsi_param *param;
 139
 140         list_for_each_entry(param, &param_list->param_list, p_list)
 141                 pr_debug("%s: %s\n", param->name, param->value);
 142 }
 143
 144 static struct iscsi_param *iscsi_set_default_param(struct iscsi_param_list *param_list,
 145                 char *name, char *value, u8 phase, u8 scope, u8 sender,
 146                 u16 type_range, u8 use)
 147 {
 148         struct iscsi_param *param = NULL;
 149
 150         param = kzalloc(sizeof(struct iscsi_param), GFP_KERNEL);
 151         if (!param) {
 152                 pr_err("Unable to allocate memory for parameter.\n");
 153                 goto out;
 154         }
 155         INIT_LIST_HEAD(&param->p_list);
 156
 157         param->name = kzalloc(strlen(name) + 1, GFP_KERNEL);
 158         if (!param->name) {
 159                 pr_err("Unable to allocate memory for parameter name.\n");
 160                 goto out;
 161         }
 162
 163         param->value = kzalloc(strlen(value) + 1, GFP_KERNEL);
 164         if (!param->value) {
 165                 pr_err("Unable to allocate memory for parameter value.\n");
 166                 goto out;
 167         }
 168
 169         memcpy(param->name, name, strlen(name));
 170         param->name[strlen(name)] = '\0';
 171         memcpy(param->value, value, strlen(value));
 172         param->value[strlen(value)] = '\0';
 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         *param_list_ptr = pl;
 438         return 0;
 439 out:
 440         iscsi_release_param_list(pl);
 441         return -1;
 442 }
 443
 444 int iscsi_set_keys_to_negotiate(
 445         int sessiontype,
 446         struct iscsi_param_list *param_list)
 447 {
 448         struct iscsi_param *param;
 449
 450         list_for_each_entry(param, &param_list->param_list, p_list) {
 451                 param->state = 0;
 452                 if (!strcmp(param->name, AUTHMETHOD)) {
 453                         SET_PSTATE_NEGOTIATE(param);
 454                 } else if (!strcmp(param->name, HEADERDIGEST)) {
 455                         SET_PSTATE_NEGOTIATE(param);
 456                 } else if (!strcmp(param->name, DATADIGEST)) {
 457                         SET_PSTATE_NEGOTIATE(param);
 458                 } else if (!strcmp(param->name, MAXCONNECTIONS)) {
 459                         SET_PSTATE_NEGOTIATE(param);
 460                 } else if (!strcmp(param->name, TARGETNAME)) {
 461                         continue;
 462                 } else if (!strcmp(param->name, INITIATORNAME)) {
 463                         continue;
 464                 } else if (!strcmp(param->name, TARGETALIAS)) {
 465                         if (param->value)
 466                                 SET_PSTATE_NEGOTIATE(param);
 467                 } else if (!strcmp(param->name, INITIATORALIAS)) {
 468                         continue;
 469                 } else if (!strcmp(param->name, TARGETPORTALGROUPTAG)) {
 470                         SET_PSTATE_NEGOTIATE(param);
 471                 } else if (!strcmp(param->name, INITIALR2T)) {
 472                         SET_PSTATE_NEGOTIATE(param);
 473                 } else if (!strcmp(param->name, IMMEDIATEDATA)) {
 474                         SET_PSTATE_NEGOTIATE(param);
 475                 } else if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) {
 476                         SET_PSTATE_NEGOTIATE(param);
 477                 } else if (!strcmp(param->name, MAXXMITDATASEGMENTLENGTH)) {
 478                         continue;
 479                 } else if (!strcmp(param->name, MAXBURSTLENGTH)) {
 480                         SET_PSTATE_NEGOTIATE(param);
 481                 } else if (!strcmp(param->name, FIRSTBURSTLENGTH)) {
 482                         SET_PSTATE_NEGOTIATE(param);
 483                 } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) {
 484                         SET_PSTATE_NEGOTIATE(param);
 485                 } else if (!strcmp(param->name, DEFAULTTIME2RETAIN)) {
 486                         SET_PSTATE_NEGOTIATE(param);
 487                 } else if (!strcmp(param->name, MAXOUTSTANDINGR2T)) {
 488                         SET_PSTATE_NEGOTIATE(param);
 489                 } else if (!strcmp(param->name, DATAPDUINORDER)) {
 490                         SET_PSTATE_NEGOTIATE(param);
 491                 } else if (!strcmp(param->name, DATASEQUENCEINORDER)) {
 492                         SET_PSTATE_NEGOTIATE(param);
 493                 } else if (!strcmp(param->name, ERRORRECOVERYLEVEL)) {
 494                         SET_PSTATE_NEGOTIATE(param);
 495                 } else if (!strcmp(param->name, SESSIONTYPE)) {
 496                         SET_PSTATE_NEGOTIATE(param);
 497                 } else if (!strcmp(param->name, IFMARKER)) {
 498                         SET_PSTATE_NEGOTIATE(param);
 499                 } else if (!strcmp(param->name, OFMARKER)) {
 500                         SET_PSTATE_NEGOTIATE(param);
 501                 } else if (!strcmp(param->name, IFMARKINT)) {
 502                         SET_PSTATE_NEGOTIATE(param);
 503                 } else if (!strcmp(param->name, OFMARKINT)) {
 504                         SET_PSTATE_NEGOTIATE(param);
 505                 }
 506         }
 507
 508         return 0;
 509 }
 510
 511 int iscsi_set_keys_irrelevant_for_discovery(
 512         struct iscsi_param_list *param_list)
 513 {
 514         struct iscsi_param *param;
 515
 516         list_for_each_entry(param, &param_list->param_list, p_list) {
 517                 if (!strcmp(param->name, MAXCONNECTIONS))
 518                         param->state &= ~PSTATE_NEGOTIATE;
 519                 else if (!strcmp(param->name, INITIALR2T))
 520                         param->state &= ~PSTATE_NEGOTIATE;
 521                 else if (!strcmp(param->name, IMMEDIATEDATA))
 522                         param->state &= ~PSTATE_NEGOTIATE;
 523                 else if (!strcmp(param->name, MAXBURSTLENGTH))
 524                         param->state &= ~PSTATE_NEGOTIATE;
 525                 else if (!strcmp(param->name, FIRSTBURSTLENGTH))
 526                         param->state &= ~PSTATE_NEGOTIATE;
 527                 else if (!strcmp(param->name, MAXOUTSTANDINGR2T))
 528                         param->state &= ~PSTATE_NEGOTIATE;
 529                 else if (!strcmp(param->name, DATAPDUINORDER))
 530                         param->state &= ~PSTATE_NEGOTIATE;
 531                 else if (!strcmp(param->name, DATASEQUENCEINORDER))
 532                         param->state &= ~PSTATE_NEGOTIATE;
 533                 else if (!strcmp(param->name, ERRORRECOVERYLEVEL))
 534                         param->state &= ~PSTATE_NEGOTIATE;
 535                 else if (!strcmp(param->name, DEFAULTTIME2WAIT))
 536                         param->state &= ~PSTATE_NEGOTIATE;
 537                 else if (!strcmp(param->name, DEFAULTTIME2RETAIN))
 538                         param->state &= ~PSTATE_NEGOTIATE;
 539                 else if (!strcmp(param->name, IFMARKER))
 540                         param->state &= ~PSTATE_NEGOTIATE;
 541                 else if (!strcmp(param->name, OFMARKER))
 542                         param->state &= ~PSTATE_NEGOTIATE;
 543                 else if (!strcmp(param->name, IFMARKINT))
 544                         param->state &= ~PSTATE_NEGOTIATE;
 545                 else if (!strcmp(param->name, OFMARKINT))
 546                         param->state &= ~PSTATE_NEGOTIATE;
 547         }
 548
 549         return 0;
 550 }
 551
 552 int iscsi_copy_param_list(
 553         struct iscsi_param_list **dst_param_list,
 554         struct iscsi_param_list *src_param_list,
 555         int leading)
 556 {
 557         struct iscsi_param *param = NULL;
 558         struct iscsi_param *new_param = NULL;
 559         struct iscsi_param_list *param_list = NULL;
 560
 561         param_list = kzalloc(sizeof(struct iscsi_param_list), GFP_KERNEL);
 562         if (!param_list) {
 563                 pr_err("Unable to allocate memory for struct iscsi_param_list.\n");
 564                 goto err_out;
 565         }
 566         INIT_LIST_HEAD(&param_list->param_list);
 567         INIT_LIST_HEAD(&param_list->extra_response_list);
 568
 569         list_for_each_entry(param, &src_param_list->param_list, p_list) {
 570                 if (!leading && (param->scope & SCOPE_SESSION_WIDE)) {
 571                         if ((strcmp(param->name, "TargetName") != 0) &&
 572                             (strcmp(param->name, "InitiatorName") != 0) &&
 573                             (strcmp(param->name, "TargetPortalGroupTag") != 0))
 574                                 continue;
 575                 }
 576
 577                 new_param = kzalloc(sizeof(struct iscsi_param), GFP_KERNEL);
 578                 if (!new_param) {
 579                         pr_err("Unable to allocate memory for struct iscsi_param.\n");
 580                         goto err_out;
 581                 }
 582
 583                 new_param->name = kstrdup(param->name, GFP_KERNEL);
 584                 new_param->value = kstrdup(param->value, GFP_KERNEL);
 585                 if (!new_param->value || !new_param->name) {
 586                         kfree(new_param->value);
 587                         kfree(new_param->name);
 588                         kfree(new_param);
 589                         pr_err("Unable to allocate memory for parameter name/value.\n");
 590                         goto err_out;
 591                 }
 592
 593                 new_param->set_param = param->set_param;
 594                 new_param->phase = param->phase;
 595                 new_param->scope = param->scope;
 596                 new_param->sender = param->sender;
 597                 new_param->type = param->type;
 598                 new_param->use = param->use;
 599                 new_param->type_range = param->type_range;
 600
 601                 list_add_tail(&new_param->p_list, &param_list->param_list);
 602         }
 603
 604         if (!list_empty(&param_list->param_list)) {
 605                 *dst_param_list = param_list;
 606         } else {
 607                 pr_err("No parameters allocated.\n");
 608                 goto err_out;
 609         }
 610
 611         return 0;
 612
 613 err_out:
 614         iscsi_release_param_list(param_list);
 615         return -1;
 616 }
 617
 618 static void iscsi_release_extra_responses(struct iscsi_param_list *param_list)
 619 {
 620         struct iscsi_extra_response *er, *er_tmp;
 621
 622         list_for_each_entry_safe(er, er_tmp, &param_list->extra_response_list,
 623                         er_list) {
 624                 list_del(&er->er_list);
 625                 kfree(er);
 626         }
 627 }
 628
 629 void iscsi_release_param_list(struct iscsi_param_list *param_list)
 630 {
 631         struct iscsi_param *param, *param_tmp;
 632
 633         list_for_each_entry_safe(param, param_tmp, &param_list->param_list,
 634                         p_list) {
 635                 list_del(&param->p_list);
 636
 637                 kfree(param->name);
 638                 param->name = NULL;
 639                 kfree(param->value);
 640                 param->value = NULL;
 641                 kfree(param);
 642                 param = NULL;
 643         }
 644
 645         iscsi_release_extra_responses(param_list);
 646
 647         kfree(param_list);
 648 }
 649
 650 struct iscsi_param *iscsi_find_param_from_key(
 651         char *key,
 652         struct iscsi_param_list *param_list)
 653 {
 654         struct iscsi_param *param;
 655
 656         if (!key || !param_list) {
 657                 pr_err("Key or parameter list pointer is NULL.\n");
 658                 return NULL;
 659         }
 660
 661         list_for_each_entry(param, &param_list->param_list, p_list) {
 662                 if (!strcmp(key, param->name))
 663                         return param;
 664         }
 665
 666         pr_err("Unable to locate key \"%s\".\n", key);
 667         return NULL;
 668 }
 669
 670 int iscsi_extract_key_value(char *textbuf, char **key, char **value)
 671 {
 672         *value = strchr(textbuf, '=');
 673         if (!*value) {
 674                 pr_err("Unable to locate \"=\" separator for key,"
 675                                 " ignoring request.\n");
 676                 return -1;
 677         }
 678
 679         *key = textbuf;
 680         **value = '\0';
 681         *value = *value + 1;
 682
 683         return 0;
 684 }
 685
 686 int iscsi_update_param_value(struct iscsi_param *param, char *value)
 687 {
 688         kfree(param->value);
 689
 690         param->value = kzalloc(strlen(value) + 1, GFP_KERNEL);
 691         if (!param->value) {
 692                 pr_err("Unable to allocate memory for value.\n");
 693                 return -ENOMEM;
 694         }
 695
 696         memcpy(param->value, value, strlen(value));
 697         param->value[strlen(value)] = '\0';
 698
 699         pr_debug("iSCSI Parameter updated to %s=%s\n",
 700                         param->name, param->value);
 701         return 0;
 702 }
 703
 704 static int iscsi_add_notunderstood_response(
 705         char *key,
 706         char *value,
 707         struct iscsi_param_list *param_list)
 708 {
 709         struct iscsi_extra_response *extra_response;
 710
 711         if (strlen(value) > VALUE_MAXLEN) {
 712                 pr_err("Value for notunderstood key \"%s\" exceeds %d,"
 713                         " protocol error.\n", key, VALUE_MAXLEN);
 714                 return -1;
 715         }
 716
 717         extra_response = kzalloc(sizeof(struct iscsi_extra_response), GFP_KERNEL);
 718         if (!extra_response) {
 719                 pr_err("Unable to allocate memory for"
 720                         " struct iscsi_extra_response.\n");
 721                 return -1;
 722         }
 723         INIT_LIST_HEAD(&extra_response->er_list);
 724
 725         strncpy(extra_response->key, key, strlen(key) + 1);
 726         strncpy(extra_response->value, NOTUNDERSTOOD,
 727                         strlen(NOTUNDERSTOOD) + 1);
 728
 729         list_add_tail(&extra_response->er_list,
 730                         &param_list->extra_response_list);
 731         return 0;
 732 }
 733
 734 static int iscsi_check_for_auth_key(char *key)
 735 {
 736         /*
 737          * RFC 1994
 738          */
 739         if (!strcmp(key, "CHAP_A") || !strcmp(key, "CHAP_I") ||
 740             !strcmp(key, "CHAP_C") || !strcmp(key, "CHAP_N") ||
 741             !strcmp(key, "CHAP_R"))
 742                 return 1;
 743
 744         /*
 745          * RFC 2945
 746          */
 747         if (!strcmp(key, "SRP_U") || !strcmp(key, "SRP_N") ||
 748             !strcmp(key, "SRP_g") || !strcmp(key, "SRP_s") ||
 749             !strcmp(key, "SRP_A") || !strcmp(key, "SRP_B") ||
 750             !strcmp(key, "SRP_M") || !strcmp(key, "SRP_HM"))
 751                 return 1;
 752
 753         return 0;
 754 }
 755
 756 static void iscsi_check_proposer_for_optional_reply(struct iscsi_param *param)
 757 {
 758         if (IS_TYPE_BOOL_AND(param)) {
 759                 if (!strcmp(param->value, NO))
 760                         SET_PSTATE_REPLY_OPTIONAL(param);
 761         } else if (IS_TYPE_BOOL_OR(param)) {
 762                 if (!strcmp(param->value, YES))
 763                         SET_PSTATE_REPLY_OPTIONAL(param);
 764                  /*
 765                   * Required for gPXE iSCSI boot client
 766                   */
 767                 if (!strcmp(param->name, IMMEDIATEDATA))
 768                         SET_PSTATE_REPLY_OPTIONAL(param);
 769         } else if (IS_TYPE_NUMBER(param)) {
 770                 if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH))
 771                         SET_PSTATE_REPLY_OPTIONAL(param);
 772                 /*
 773                  * The GlobalSAN iSCSI Initiator for MacOSX does
 774                  * not respond to MaxBurstLength, FirstBurstLength,
 775                  * DefaultTime2Wait or DefaultTime2Retain parameter keys.
 776                  * So, we set them to 'reply optional' here, and assume the
 777                  * the defaults from iscsi_parameters.h if the initiator
 778                  * is not RFC compliant and the keys are not negotiated.
 779                  */
 780                 if (!strcmp(param->name, MAXBURSTLENGTH))
 781                         SET_PSTATE_REPLY_OPTIONAL(param);
 782                 if (!strcmp(param->name, FIRSTBURSTLENGTH))
 783                         SET_PSTATE_REPLY_OPTIONAL(param);
 784                 if (!strcmp(param->name, DEFAULTTIME2WAIT))
 785                         SET_PSTATE_REPLY_OPTIONAL(param);
 786                 if (!strcmp(param->name, DEFAULTTIME2RETAIN))
 787                         SET_PSTATE_REPLY_OPTIONAL(param);
 788                 /*
 789                  * Required for gPXE iSCSI boot client
 790                  */
 791                 if (!strcmp(param->name, MAXCONNECTIONS))
 792                         SET_PSTATE_REPLY_OPTIONAL(param);
 793         } else if (IS_PHASE_DECLARATIVE(param))
 794                 SET_PSTATE_REPLY_OPTIONAL(param);
 795 }
 796
 797 static int iscsi_check_boolean_value(struct iscsi_param *param, char *value)
 798 {
 799         if (strcmp(value, YES) && strcmp(value, NO)) {
 800                 pr_err("Illegal value for \"%s\", must be either"
 801                         " \"%s\" or \"%s\".\n", param->name, YES, NO);
 802                 return -1;
 803         }
 804
 805         return 0;
 806 }
 807
 808 static int iscsi_check_numerical_value(struct iscsi_param *param, char *value_ptr)
 809 {
 810         char *tmpptr;
 811         int value = 0;
 812
 813         value = simple_strtoul(value_ptr, &tmpptr, 0);
 814
 815         if (IS_TYPERANGE_0_TO_2(param)) {
 816                 if ((value < 0) || (value > 2)) {
 817                         pr_err("Illegal value for \"%s\", must be"
 818                                 " between 0 and 2.\n", param->name);
 819                         return -1;
 820                 }
 821                 return 0;
 822         }
 823         if (IS_TYPERANGE_0_TO_3600(param)) {
 824                 if ((value < 0) || (value > 3600)) {
 825                         pr_err("Illegal value for \"%s\", must be"
 826                                 " between 0 and 3600.\n", param->name);
 827                         return -1;
 828                 }
 829                 return 0;
 830         }
 831         if (IS_TYPERANGE_0_TO_32767(param)) {
 832                 if ((value < 0) || (value > 32767)) {
 833                         pr_err("Illegal value for \"%s\", must be"
 834                                 " between 0 and 32767.\n", param->name);
 835                         return -1;
 836                 }
 837                 return 0;
 838         }
 839         if (IS_TYPERANGE_0_TO_65535(param)) {
 840                 if ((value < 0) || (value > 65535)) {
 841                         pr_err("Illegal value for \"%s\", must be"
 842                                 " between 0 and 65535.\n", param->name);
 843                         return -1;
 844                 }
 845                 return 0;
 846         }
 847         if (IS_TYPERANGE_1_TO_65535(param)) {
 848                 if ((value < 1) || (value > 65535)) {
 849                         pr_err("Illegal value for \"%s\", must be"
 850                                 " between 1 and 65535.\n", param->name);
 851                         return -1;
 852                 }
 853                 return 0;
 854         }
 855         if (IS_TYPERANGE_2_TO_3600(param)) {
 856                 if ((value < 2) || (value > 3600)) {
 857                         pr_err("Illegal value for \"%s\", must be"
 858                                 " between 2 and 3600.\n", param->name);
 859                         return -1;
 860                 }
 861                 return 0;
 862         }
 863         if (IS_TYPERANGE_512_TO_16777215(param)) {
 864                 if ((value < 512) || (value > 16777215)) {
 865                         pr_err("Illegal value for \"%s\", must be"
 866                                 " between 512 and 16777215.\n", param->name);
 867                         return -1;
 868                 }
 869                 return 0;
 870         }
 871
 872         return 0;
 873 }
 874
 875 static int iscsi_check_numerical_range_value(struct iscsi_param *param, char *value)
 876 {
 877         char *left_val_ptr = NULL, *right_val_ptr = NULL;
 878         char *tilde_ptr = NULL;
 879         u32 left_val, right_val, local_left_val;
 880
 881         if (strcmp(param->name, IFMARKINT) &&
 882             strcmp(param->name, OFMARKINT)) {
 883                 pr_err("Only parameters \"%s\" or \"%s\" may contain a"
 884                        " numerical range value.\n", IFMARKINT, OFMARKINT);
 885                 return -1;
 886         }
 887
 888         if (IS_PSTATE_PROPOSER(param))
 889                 return 0;
 890
 891         tilde_ptr = strchr(value, '~');
 892         if (!tilde_ptr) {
 893                 pr_err("Unable to locate numerical range indicator"
 894                         " \"~\" for \"%s\".\n", param->name);
 895                 return -1;
 896         }
 897         *tilde_ptr = '\0';
 898
 899         left_val_ptr = value;
 900         right_val_ptr = value + strlen(left_val_ptr) + 1;
 901
 902         if (iscsi_check_numerical_value(param, left_val_ptr) < 0)
 903                 return -1;
 904         if (iscsi_check_numerical_value(param, right_val_ptr) < 0)
 905                 return -1;
 906
 907         left_val = simple_strtoul(left_val_ptr, NULL, 0);
 908         right_val = simple_strtoul(right_val_ptr, NULL, 0);
 909         *tilde_ptr = '~';
 910
 911         if (right_val < left_val) {
 912                 pr_err("Numerical range for parameter \"%s\" contains"
 913                         " a right value which is less than the left.\n",
 914                                 param->name);
 915                 return -1;
 916         }
 917
 918         /*
 919          * For now,  enforce reasonable defaults for [I,O]FMarkInt.
 920          */
 921         tilde_ptr = strchr(param->value, '~');
 922         if (!tilde_ptr) {
 923                 pr_err("Unable to locate numerical range indicator"
 924                         " \"~\" for \"%s\".\n", param->name);
 925                 return -1;
 926         }
 927         *tilde_ptr = '\0';
 928
 929         left_val_ptr = param->value;
 930         right_val_ptr = param->value + strlen(left_val_ptr) + 1;
 931
 932         local_left_val = simple_strtoul(left_val_ptr, NULL, 0);
 933         *tilde_ptr = '~';
 934
 935         if (param->set_param) {
 936                 if ((left_val < local_left_val) ||
 937                     (right_val < local_left_val)) {
 938                         pr_err("Passed value range \"%u~%u\" is below"
 939                                 " minimum left value \"%u\" for key \"%s\","
 940                                 " rejecting.\n", left_val, right_val,
 941                                 local_left_val, param->name);
 942                         return -1;
 943                 }
 944         } else {
 945                 if ((left_val < local_left_val) &&
 946                     (right_val < local_left_val)) {
 947                         pr_err("Received value range \"%u~%u\" is"
 948                                 " below minimum left value \"%u\" for key"
 949                                 " \"%s\", rejecting.\n", left_val, right_val,
 950                                 local_left_val, param->name);
 951                         SET_PSTATE_REJECT(param);
 952                         if (iscsi_update_param_value(param, REJECT) < 0)
 953                                 return -1;
 954                 }
 955         }
 956
 957         return 0;
 958 }
 959
 960 static int iscsi_check_string_or_list_value(struct iscsi_param *param, char *value)
 961 {
 962         if (IS_PSTATE_PROPOSER(param))
 963                 return 0;
 964
 965         if (IS_TYPERANGE_AUTH_PARAM(param)) {
 966                 if (strcmp(value, KRB5) && strcmp(value, SPKM1) &&
 967                     strcmp(value, SPKM2) && strcmp(value, SRP) &&
 968                     strcmp(value, CHAP) && strcmp(value, NONE)) {
 969                         pr_err("Illegal value for \"%s\", must be"
 970                                 " \"%s\", \"%s\", \"%s\", \"%s\", \"%s\""
 971                                 " or \"%s\".\n", param->name, KRB5,
 972                                         SPKM1, SPKM2, SRP, CHAP, NONE);
 973                         return -1;
 974                 }
 975         }
 976         if (IS_TYPERANGE_DIGEST_PARAM(param)) {
 977                 if (strcmp(value, CRC32C) && strcmp(value, NONE)) {
 978                         pr_err("Illegal value for \"%s\", must be"
 979                                 " \"%s\" or \"%s\".\n", param->name,
 980                                         CRC32C, NONE);
 981                         return -1;
 982                 }
 983         }
 984         if (IS_TYPERANGE_SESSIONTYPE(param)) {
 985                 if (strcmp(value, DISCOVERY) && strcmp(value, NORMAL)) {
 986                         pr_err("Illegal value for \"%s\", must be"
 987                                 " \"%s\" or \"%s\".\n", param->name,
 988                                         DISCOVERY, NORMAL);
 989                         return -1;
 990                 }
 991         }
 992
 993         return 0;
 994 }
 995
 996 /*
 997  *      This function is used to pick a value range number,  currently just
 998  *      returns the lesser of both right values.
 999  */
1000 static char *iscsi_get_value_from_number_range(
1001         struct iscsi_param *param,
1002         char *value)
1003 {
1004         char *end_ptr, *tilde_ptr1 = NULL, *tilde_ptr2 = NULL;
1005         u32 acceptor_right_value, proposer_right_value;
1006
1007         tilde_ptr1 = strchr(value, '~');
1008         if (!tilde_ptr1)
1009                 return NULL;
1010         *tilde_ptr1++ = '\0';
1011         proposer_right_value = simple_strtoul(tilde_ptr1, &end_ptr, 0);
1012
1013         tilde_ptr2 = strchr(param->value, '~');
1014         if (!tilde_ptr2)
1015                 return NULL;
1016         *tilde_ptr2++ = '\0';
1017         acceptor_right_value = simple_strtoul(tilde_ptr2, &end_ptr, 0);
1018
1019         return (acceptor_right_value >= proposer_right_value) ?
1020                 tilde_ptr1 : tilde_ptr2;
1021 }
1022
1023 static char *iscsi_check_valuelist_for_support(
1024         struct iscsi_param *param,
1025         char *value)
1026 {
1027         char *tmp1 = NULL, *tmp2 = NULL;
1028         char *acceptor_values = NULL, *proposer_values = NULL;
1029
1030         acceptor_values = param->value;
1031         proposer_values = value;
1032
1033         do {
1034                 if (!proposer_values)
1035                         return NULL;
1036                 tmp1 = strchr(proposer_values, ',');
1037                 if (tmp1)
1038                         *tmp1 = '\0';
1039                 acceptor_values = param->value;
1040                 do {
1041                         if (!acceptor_values) {
1042                                 if (tmp1)
1043                                         *tmp1 = ',';
1044                                 return NULL;
1045                         }
1046                         tmp2 = strchr(acceptor_values, ',');
1047                         if (tmp2)
1048                                 *tmp2 = '\0';
1049                         if (!strcmp(acceptor_values, proposer_values)) {
1050                                 if (tmp2)
1051                                         *tmp2 = ',';
1052                                 goto out;
1053                         }
1054                         if (tmp2)
1055                                 *tmp2++ = ',';
1056
1057                         acceptor_values = tmp2;
1058                 } while (acceptor_values);
1059                 if (tmp1)
1060                         *tmp1++ = ',';
1061                 proposer_values = tmp1;
1062         } while (proposer_values);
1063
1064 out:
1065         return proposer_values;
1066 }
1067
1068 static int iscsi_check_acceptor_state(struct iscsi_param *param, char *value,
1069                                 struct iscsi_conn *conn)
1070 {
1071         u8 acceptor_boolean_value = 0, proposer_boolean_value = 0;
1072         char *negoitated_value = NULL;
1073
1074         if (IS_PSTATE_ACCEPTOR(param)) {
1075                 pr_err("Received key \"%s\" twice, protocol error.\n",
1076                                 param->name);
1077                 return -1;
1078         }
1079
1080         if (IS_PSTATE_REJECT(param))
1081                 return 0;
1082
1083         if (IS_TYPE_BOOL_AND(param)) {
1084                 if (!strcmp(value, YES))
1085                         proposer_boolean_value = 1;
1086                 if (!strcmp(param->value, YES))
1087                         acceptor_boolean_value = 1;
1088                 if (acceptor_boolean_value && proposer_boolean_value)
1089                         do {} while (0);
1090                 else {
1091                         if (iscsi_update_param_value(param, NO) < 0)
1092                                 return -1;
1093                         if (!proposer_boolean_value)
1094                                 SET_PSTATE_REPLY_OPTIONAL(param);
1095                 }
1096         } else if (IS_TYPE_BOOL_OR(param)) {
1097                 if (!strcmp(value, YES))
1098                         proposer_boolean_value = 1;
1099                 if (!strcmp(param->value, YES))
1100                         acceptor_boolean_value = 1;
1101                 if (acceptor_boolean_value || proposer_boolean_value) {
1102                         if (iscsi_update_param_value(param, YES) < 0)
1103                                 return -1;
1104                         if (proposer_boolean_value)
1105                                 SET_PSTATE_REPLY_OPTIONAL(param);
1106                 }
1107         } else if (IS_TYPE_NUMBER(param)) {
1108                 char *tmpptr, buf[10];
1109                 u32 acceptor_value = simple_strtoul(param->value, &tmpptr, 0);
1110                 u32 proposer_value = simple_strtoul(value, &tmpptr, 0);
1111
1112                 memset(buf, 0, 10);
1113
1114                 if (!strcmp(param->name, MAXCONNECTIONS) ||
1115                     !strcmp(param->name, MAXBURSTLENGTH) ||
1116                     !strcmp(param->name, FIRSTBURSTLENGTH) ||
1117                     !strcmp(param->name, MAXOUTSTANDINGR2T) ||
1118                     !strcmp(param->name, DEFAULTTIME2RETAIN) ||
1119                     !strcmp(param->name, ERRORRECOVERYLEVEL)) {
1120                         if (proposer_value > acceptor_value) {
1121                                 sprintf(buf, "%u", acceptor_value);
1122                                 if (iscsi_update_param_value(param,
1123                                                 &buf[0]) < 0)
1124                                         return -1;
1125                         } else {
1126                                 if (iscsi_update_param_value(param, value) < 0)
1127                                         return -1;
1128                         }
1129                 } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) {
1130                         if (acceptor_value > proposer_value) {
1131                                 sprintf(buf, "%u", acceptor_value);
1132                                 if (iscsi_update_param_value(param,
1133                                                 &buf[0]) < 0)
1134                                         return -1;
1135                         } else {
1136                                 if (iscsi_update_param_value(param, value) < 0)
1137                                         return -1;
1138                         }
1139                 } else {
1140                         if (iscsi_update_param_value(param, value) < 0)
1141                                 return -1;
1142                 }
1143
1144                 if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) {
1145                         struct iscsi_param *param_mxdsl;
1146                         unsigned long long tmp;
1147                         int rc;
1148
1149                         rc = strict_strtoull(param->value, 0, &tmp);
1150                         if (rc < 0)
1151                                 return -1;
1152
1153                         conn->conn_ops->MaxRecvDataSegmentLength = tmp;
1154                         pr_debug("Saving op->MaxRecvDataSegmentLength from"
1155                                 " original initiator received value: %u\n",
1156                                 conn->conn_ops->MaxRecvDataSegmentLength);
1157
1158                         param_mxdsl = iscsi_find_param_from_key(
1159                                                 MAXXMITDATASEGMENTLENGTH,
1160                                                 conn->param_list);
1161                         if (!param_mxdsl)
1162                                 return -1;
1163
1164                         rc = iscsi_update_param_value(param,
1165                                                 param_mxdsl->value);
1166                         if (rc < 0)
1167                                 return -1;
1168
1169                         pr_debug("Updated %s to target MXDSL value: %s\n",
1170                                         param->name, param->value);
1171                 }
1172
1173         } else if (IS_TYPE_NUMBER_RANGE(param)) {
1174                 negoitated_value = iscsi_get_value_from_number_range(
1175                                         param, value);
1176                 if (!negoitated_value)
1177                         return -1;
1178                 if (iscsi_update_param_value(param, negoitated_value) < 0)
1179                         return -1;
1180         } else if (IS_TYPE_VALUE_LIST(param)) {
1181                 negoitated_value = iscsi_check_valuelist_for_support(
1182                                         param, value);
1183                 if (!negoitated_value) {
1184                         pr_err("Proposer's value list \"%s\" contains"
1185                                 " no valid values from Acceptor's value list"
1186                                 " \"%s\".\n", value, param->value);
1187                         return -1;
1188                 }
1189                 if (iscsi_update_param_value(param, negoitated_value) < 0)
1190                         return -1;
1191         } else if (IS_PHASE_DECLARATIVE(param)) {
1192                 if (iscsi_update_param_value(param, value) < 0)
1193                         return -1;
1194                 SET_PSTATE_REPLY_OPTIONAL(param);
1195         }
1196
1197         return 0;
1198 }
1199
1200 static int iscsi_check_proposer_state(struct iscsi_param *param, char *value)
1201 {
1202         if (IS_PSTATE_RESPONSE_GOT(param)) {
1203                 pr_err("Received key \"%s\" twice, protocol error.\n",
1204                                 param->name);
1205                 return -1;
1206         }
1207
1208         if (IS_TYPE_NUMBER_RANGE(param)) {
1209                 u32 left_val = 0, right_val = 0, recieved_value = 0;
1210                 char *left_val_ptr = NULL, *right_val_ptr = NULL;
1211                 char *tilde_ptr = NULL;
1212
1213                 if (!strcmp(value, IRRELEVANT) || !strcmp(value, REJECT)) {
1214                         if (iscsi_update_param_value(param, value) < 0)
1215                                 return -1;
1216                         return 0;
1217                 }
1218
1219                 tilde_ptr = strchr(value, '~');
1220                 if (tilde_ptr) {
1221                         pr_err("Illegal \"~\" in response for \"%s\".\n",
1222                                         param->name);
1223                         return -1;
1224                 }
1225                 tilde_ptr = strchr(param->value, '~');
1226                 if (!tilde_ptr) {
1227                         pr_err("Unable to locate numerical range"
1228                                 " indicator \"~\" for \"%s\".\n", param->name);
1229                         return -1;
1230                 }
1231                 *tilde_ptr = '\0';
1232
1233                 left_val_ptr = param->value;
1234                 right_val_ptr = param->value + strlen(left_val_ptr) + 1;
1235                 left_val = simple_strtoul(left_val_ptr, NULL, 0);
1236                 right_val = simple_strtoul(right_val_ptr, NULL, 0);
1237                 recieved_value = simple_strtoul(value, NULL, 0);
1238
1239                 *tilde_ptr = '~';
1240
1241                 if ((recieved_value < left_val) ||
1242                     (recieved_value > right_val)) {
1243                         pr_err("Illegal response \"%s=%u\", value must"
1244                                 " be between %u and %u.\n", param->name,
1245                                 recieved_value, left_val, right_val);
1246                         return -1;
1247                 }
1248         } else if (IS_TYPE_VALUE_LIST(param)) {
1249                 char *comma_ptr = NULL, *tmp_ptr = NULL;
1250
1251                 comma_ptr = strchr(value, ',');
1252                 if (comma_ptr) {
1253                         pr_err("Illegal \",\" in response for \"%s\".\n",
1254                                         param->name);
1255                         return -1;
1256                 }
1257
1258                 tmp_ptr = iscsi_check_valuelist_for_support(param, value);
1259                 if (!tmp_ptr)
1260                         return -1;
1261         }
1262
1263         if (iscsi_update_param_value(param, value) < 0)
1264                 return -1;
1265
1266         return 0;
1267 }
1268
1269 static int iscsi_check_value(struct iscsi_param *param, char *value)
1270 {
1271         char *comma_ptr = NULL;
1272
1273         if (!strcmp(value, REJECT)) {
1274                 if (!strcmp(param->name, IFMARKINT) ||
1275                     !strcmp(param->name, OFMARKINT)) {
1276                         /*
1277                          * Reject is not fatal for [I,O]FMarkInt,  and causes
1278                          * [I,O]FMarker to be reset to No. (See iSCSI v20 A.3.2)
1279                          */
1280                         SET_PSTATE_REJECT(param);
1281                         return 0;
1282                 }
1283                 pr_err("Received %s=%s\n", param->name, value);
1284                 return -1;
1285         }
1286         if (!strcmp(value, IRRELEVANT)) {
1287                 pr_debug("Received %s=%s\n", param->name, value);
1288                 SET_PSTATE_IRRELEVANT(param);
1289                 return 0;
1290         }
1291         if (!strcmp(value, NOTUNDERSTOOD)) {
1292                 if (!IS_PSTATE_PROPOSER(param)) {
1293                         pr_err("Received illegal offer %s=%s\n",
1294                                 param->name, value);
1295                         return -1;
1296                 }
1297
1298 /* #warning FIXME: Add check for X-ExtensionKey here */
1299                 pr_err("Standard iSCSI key \"%s\" cannot be answered"
1300                         " with \"%s\", protocol error.\n", param->name, value);
1301                 return -1;
1302         }
1303
1304         do {
1305                 comma_ptr = NULL;
1306                 comma_ptr = strchr(value, ',');
1307
1308                 if (comma_ptr && !IS_TYPE_VALUE_LIST(param)) {
1309                         pr_err("Detected value separator \",\", but"
1310                                 " key \"%s\" does not allow a value list,"
1311                                 " protocol error.\n", param->name);
1312                         return -1;
1313                 }
1314                 if (comma_ptr)
1315                         *comma_ptr = '\0';
1316
1317                 if (strlen(value) > VALUE_MAXLEN) {
1318                         pr_err("Value for key \"%s\" exceeds %d,"
1319                                 " protocol error.\n", param->name,
1320                                 VALUE_MAXLEN);
1321                         return -1;
1322                 }
1323
1324                 if (IS_TYPE_BOOL_AND(param) || IS_TYPE_BOOL_OR(param)) {
1325                         if (iscsi_check_boolean_value(param, value) < 0)
1326                                 return -1;
1327                 } else if (IS_TYPE_NUMBER(param)) {
1328                         if (iscsi_check_numerical_value(param, value) < 0)
1329                                 return -1;
1330                 } else if (IS_TYPE_NUMBER_RANGE(param)) {
1331                         if (iscsi_check_numerical_range_value(param, value) < 0)
1332                                 return -1;
1333                 } else if (IS_TYPE_STRING(param) || IS_TYPE_VALUE_LIST(param)) {
1334                         if (iscsi_check_string_or_list_value(param, value) < 0)
1335                                 return -1;
1336                 } else {
1337                         pr_err("Huh? 0x%02x\n", param->type);
1338                         return -1;
1339                 }
1340
1341                 if (comma_ptr)
1342                         *comma_ptr++ = ',';
1343
1344                 value = comma_ptr;
1345         } while (value);
1346
1347         return 0;
1348 }
1349
1350 static struct iscsi_param *__iscsi_check_key(
1351         char *key,
1352         int sender,
1353         struct iscsi_param_list *param_list)
1354 {
1355         struct iscsi_param *param;
1356
1357         if (strlen(key) > KEY_MAXLEN) {
1358                 pr_err("Length of key name \"%s\" exceeds %d.\n",
1359                         key, KEY_MAXLEN);
1360                 return NULL;
1361         }
1362
1363         param = iscsi_find_param_from_key(key, param_list);
1364         if (!param)
1365                 return NULL;
1366
1367         if ((sender & SENDER_INITIATOR) && !IS_SENDER_INITIATOR(param)) {
1368                 pr_err("Key \"%s\" may not be sent to %s,"
1369                         " protocol error.\n", param->name,
1370                         (sender & SENDER_RECEIVER) ? "target" : "initiator");
1371                 return NULL;
1372         }
1373
1374         if ((sender & SENDER_TARGET) && !IS_SENDER_TARGET(param)) {
1375                 pr_err("Key \"%s\" may not be sent to %s,"
1376                         " protocol error.\n", param->name,
1377                         (sender & SENDER_RECEIVER) ? "initiator" : "target");
1378                 return NULL;
1379         }
1380
1381         return param;
1382 }
1383
1384 static struct iscsi_param *iscsi_check_key(
1385         char *key,
1386         int phase,
1387         int sender,
1388         struct iscsi_param_list *param_list)
1389 {
1390         struct iscsi_param *param;
1391         /*
1392          * Key name length must not exceed 63 bytes. (See iSCSI v20 5.1)
1393          */
1394         if (strlen(key) > KEY_MAXLEN) {
1395                 pr_err("Length of key name \"%s\" exceeds %d.\n",
1396                         key, KEY_MAXLEN);
1397                 return NULL;
1398         }
1399
1400         param = iscsi_find_param_from_key(key, param_list);
1401         if (!param)
1402                 return NULL;
1403
1404         if ((sender & SENDER_INITIATOR) && !IS_SENDER_INITIATOR(param)) {
1405                 pr_err("Key \"%s\" may not be sent to %s,"
1406                         " protocol error.\n", param->name,
1407                         (sender & SENDER_RECEIVER) ? "target" : "initiator");
1408                 return NULL;
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         if (IS_PSTATE_ACCEPTOR(param)) {
1418                 pr_err("Key \"%s\" received twice, protocol error.\n",
1419                                 key);
1420                 return NULL;
1421         }
1422
1423         if (!phase)
1424                 return param;
1425
1426         if (!(param->phase & phase)) {
1427                 pr_err("Key \"%s\" may not be negotiated during ",
1428                                 param->name);
1429                 switch (phase) {
1430                 case PHASE_SECURITY:
1431                         pr_debug("Security phase.\n");
1432                         break;
1433                 case PHASE_OPERATIONAL:
1434                         pr_debug("Operational phase.\n");
1435                         break;
1436                 default:
1437                         pr_debug("Unknown phase.\n");
1438                 }
1439                 return NULL;
1440         }
1441
1442         return param;
1443 }
1444
1445 static int iscsi_enforce_integrity_rules(
1446         u8 phase,
1447         struct iscsi_param_list *param_list)
1448 {
1449         char *tmpptr;
1450         u8 DataSequenceInOrder = 0;
1451         u8 ErrorRecoveryLevel = 0, SessionType = 0;
1452         u8 IFMarker = 0, OFMarker = 0;
1453         u8 IFMarkInt_Reject = 1, OFMarkInt_Reject = 1;
1454         u32 FirstBurstLength = 0, MaxBurstLength = 0;
1455         struct iscsi_param *param = NULL;
1456
1457         list_for_each_entry(param, &param_list->param_list, p_list) {
1458                 if (!(param->phase & phase))
1459                         continue;
1460                 if (!strcmp(param->name, SESSIONTYPE))
1461                         if (!strcmp(param->value, NORMAL))
1462                                 SessionType = 1;
1463                 if (!strcmp(param->name, ERRORRECOVERYLEVEL))
1464                         ErrorRecoveryLevel = simple_strtoul(param->value,
1465                                         &tmpptr, 0);
1466                 if (!strcmp(param->name, DATASEQUENCEINORDER))
1467                         if (!strcmp(param->value, YES))
1468                                 DataSequenceInOrder = 1;
1469                 if (!strcmp(param->name, MAXBURSTLENGTH))
1470                         MaxBurstLength = simple_strtoul(param->value,
1471                                         &tmpptr, 0);
1472                 if (!strcmp(param->name, IFMARKER))
1473                         if (!strcmp(param->value, YES))
1474                                 IFMarker = 1;
1475                 if (!strcmp(param->name, OFMARKER))
1476                         if (!strcmp(param->value, YES))
1477                                 OFMarker = 1;
1478                 if (!strcmp(param->name, IFMARKINT))
1479                         if (!strcmp(param->value, REJECT))
1480                                 IFMarkInt_Reject = 1;
1481                 if (!strcmp(param->name, OFMARKINT))
1482                         if (!strcmp(param->value, REJECT))
1483                                 OFMarkInt_Reject = 1;
1484         }
1485
1486         list_for_each_entry(param, &param_list->param_list, p_list) {
1487                 if (!(param->phase & phase))
1488                         continue;
1489                 if (!SessionType && (!IS_PSTATE_ACCEPTOR(param) &&
1490                      (strcmp(param->name, IFMARKER) &&
1491                       strcmp(param->name, OFMARKER) &&
1492                       strcmp(param->name, IFMARKINT) &&
1493                       strcmp(param->name, OFMARKINT))))
1494                         continue;
1495                 if (!strcmp(param->name, MAXOUTSTANDINGR2T) &&
1496                     DataSequenceInOrder && (ErrorRecoveryLevel > 0)) {
1497                         if (strcmp(param->value, "1")) {
1498                                 if (iscsi_update_param_value(param, "1") < 0)
1499                                         return -1;
1500                                 pr_debug("Reset \"%s\" to \"%s\".\n",
1501                                         param->name, param->value);
1502                         }
1503                 }
1504                 if (!strcmp(param->name, MAXCONNECTIONS) && !SessionType) {
1505                         if (strcmp(param->value, "1")) {
1506                                 if (iscsi_update_param_value(param, "1") < 0)
1507                                         return -1;
1508                                 pr_debug("Reset \"%s\" to \"%s\".\n",
1509                                         param->name, param->value);
1510                         }
1511                 }
1512                 if (!strcmp(param->name, FIRSTBURSTLENGTH)) {
1513                         FirstBurstLength = simple_strtoul(param->value,
1514                                         &tmpptr, 0);
1515                         if (FirstBurstLength > MaxBurstLength) {
1516                                 char tmpbuf[10];
1517                                 memset(tmpbuf, 0, 10);
1518                                 sprintf(tmpbuf, "%u", MaxBurstLength);
1519                                 if (iscsi_update_param_value(param, tmpbuf))
1520                                         return -1;
1521                                 pr_debug("Reset \"%s\" to \"%s\".\n",
1522                                         param->name, param->value);
1523                         }
1524                 }
1525                 if (!strcmp(param->name, IFMARKER) && IFMarkInt_Reject) {
1526                         if (iscsi_update_param_value(param, NO) < 0)
1527                                 return -1;
1528                         IFMarker = 0;
1529                         pr_debug("Reset \"%s\" to \"%s\".\n",
1530                                         param->name, param->value);
1531                 }
1532                 if (!strcmp(param->name, OFMARKER) && OFMarkInt_Reject) {
1533                         if (iscsi_update_param_value(param, NO) < 0)
1534                                 return -1;
1535                         OFMarker = 0;
1536                         pr_debug("Reset \"%s\" to \"%s\".\n",
1537                                          param->name, param->value);
1538                 }
1539                 if (!strcmp(param->name, IFMARKINT) && !IFMarker) {
1540                         if (!strcmp(param->value, REJECT))
1541                                 continue;
1542                         param->state &= ~PSTATE_NEGOTIATE;
1543                         if (iscsi_update_param_value(param, IRRELEVANT) < 0)
1544                                 return -1;
1545                         pr_debug("Reset \"%s\" to \"%s\".\n",
1546                                         param->name, param->value);
1547                 }
1548                 if (!strcmp(param->name, OFMARKINT) && !OFMarker) {
1549                         if (!strcmp(param->value, REJECT))
1550                                 continue;
1551                         param->state &= ~PSTATE_NEGOTIATE;
1552                         if (iscsi_update_param_value(param, IRRELEVANT) < 0)
1553                                 return -1;
1554                         pr_debug("Reset \"%s\" to \"%s\".\n",
1555                                         param->name, param->value);
1556                 }
1557         }
1558
1559         return 0;
1560 }
1561
1562 int iscsi_decode_text_input(
1563         u8 phase,
1564         u8 sender,
1565         char *textbuf,
1566         u32 length,
1567         struct iscsi_conn *conn)
1568 {
1569         struct iscsi_param_list *param_list = conn->param_list;
1570         char *tmpbuf, *start = NULL, *end = NULL;
1571
1572         tmpbuf = kzalloc(length + 1, GFP_KERNEL);
1573         if (!tmpbuf) {
1574                 pr_err("Unable to allocate memory for tmpbuf.\n");
1575                 return -1;
1576         }
1577
1578         memcpy(tmpbuf, textbuf, length);
1579         tmpbuf[length] = '\0';
1580         start = tmpbuf;
1581         end = (start + length);
1582
1583         while (start < end) {
1584                 char *key, *value;
1585                 struct iscsi_param *param;
1586
1587                 if (iscsi_extract_key_value(start, &key, &value) < 0) {
1588                         kfree(tmpbuf);
1589                         return -1;
1590                 }
1591
1592                 pr_debug("Got key: %s=%s\n", key, value);
1593
1594                 if (phase & PHASE_SECURITY) {
1595                         if (iscsi_check_for_auth_key(key) > 0) {
1596                                 char *tmpptr = key + strlen(key);
1597                                 *tmpptr = '=';
1598                                 kfree(tmpbuf);
1599                                 return 1;
1600                         }
1601                 }
1602
1603                 param = iscsi_check_key(key, phase, sender, param_list);
1604                 if (!param) {
1605                         if (iscsi_add_notunderstood_response(key,
1606                                         value, param_list) < 0) {
1607                                 kfree(tmpbuf);
1608                                 return -1;
1609                         }
1610                         start += strlen(key) + strlen(value) + 2;
1611                         continue;
1612                 }
1613                 if (iscsi_check_value(param, value) < 0) {
1614                         kfree(tmpbuf);
1615                         return -1;
1616                 }
1617
1618                 start += strlen(key) + strlen(value) + 2;
1619
1620                 if (IS_PSTATE_PROPOSER(param)) {
1621                         if (iscsi_check_proposer_state(param, value) < 0) {
1622                                 kfree(tmpbuf);
1623                                 return -1;
1624                         }
1625                         SET_PSTATE_RESPONSE_GOT(param);
1626                 } else {
1627                         if (iscsi_check_acceptor_state(param, value, conn) < 0) {
1628                                 kfree(tmpbuf);
1629                                 return -1;
1630                         }
1631                         SET_PSTATE_ACCEPTOR(param);
1632                 }
1633         }
1634
1635         kfree(tmpbuf);
1636         return 0;
1637 }
1638
1639 int iscsi_encode_text_output(
1640         u8 phase,
1641         u8 sender,
1642         char *textbuf,
1643         u32 *length,
1644         struct iscsi_param_list *param_list)
1645 {
1646         char *output_buf = NULL;
1647         struct iscsi_extra_response *er;
1648         struct iscsi_param *param;
1649
1650         output_buf = textbuf + *length;
1651
1652         if (iscsi_enforce_integrity_rules(phase, param_list) < 0)
1653                 return -1;
1654
1655         list_for_each_entry(param, &param_list->param_list, p_list) {
1656                 if (!(param->sender & sender))
1657                         continue;
1658                 if (IS_PSTATE_ACCEPTOR(param) &&
1659                     !IS_PSTATE_RESPONSE_SENT(param) &&
1660                     !IS_PSTATE_REPLY_OPTIONAL(param) &&
1661                     (param->phase & phase)) {
1662                         *length += sprintf(output_buf, "%s=%s",
1663                                 param->name, param->value);
1664                         *length += 1;
1665                         output_buf = textbuf + *length;
1666                         SET_PSTATE_RESPONSE_SENT(param);
1667                         pr_debug("Sending key: %s=%s\n",
1668                                 param->name, param->value);
1669                         continue;
1670                 }
1671                 if (IS_PSTATE_NEGOTIATE(param) &&
1672                     !IS_PSTATE_ACCEPTOR(param) &&
1673                     !IS_PSTATE_PROPOSER(param) &&
1674                     (param->phase & phase)) {
1675                         *length += sprintf(output_buf, "%s=%s",
1676                                 param->name, param->value);
1677                         *length += 1;
1678                         output_buf = textbuf + *length;
1679                         SET_PSTATE_PROPOSER(param);
1680                         iscsi_check_proposer_for_optional_reply(param);
1681                         pr_debug("Sending key: %s=%s\n",
1682                                 param->name, param->value);
1683                 }
1684         }
1685
1686         list_for_each_entry(er, &param_list->extra_response_list, er_list) {
1687                 *length += sprintf(output_buf, "%s=%s", er->key, er->value);
1688                 *length += 1;
1689                 output_buf = textbuf + *length;
1690                 pr_debug("Sending key: %s=%s\n", er->key, er->value);
1691         }
1692         iscsi_release_extra_responses(param_list);
1693
1694         return 0;
1695 }
1696
1697 int iscsi_check_negotiated_keys(struct iscsi_param_list *param_list)
1698 {
1699         int ret = 0;
1700         struct iscsi_param *param;
1701
1702         list_for_each_entry(param, &param_list->param_list, p_list) {
1703                 if (IS_PSTATE_NEGOTIATE(param) &&
1704                     IS_PSTATE_PROPOSER(param) &&
1705                     !IS_PSTATE_RESPONSE_GOT(param) &&
1706                     !IS_PSTATE_REPLY_OPTIONAL(param) &&
1707                     !IS_PHASE_DECLARATIVE(param)) {
1708                         pr_err("No response for proposed key \"%s\".\n",
1709                                         param->name);
1710                         ret = -1;
1711                 }
1712         }
1713
1714         return ret;
1715 }
1716
1717 int iscsi_change_param_value(
1718         char *keyvalue,
1719         struct iscsi_param_list *param_list,
1720         int check_key)
1721 {
1722         char *key = NULL, *value = NULL;
1723         struct iscsi_param *param;
1724         int sender = 0;
1725
1726         if (iscsi_extract_key_value(keyvalue, &key, &value) < 0)
1727                 return -1;
1728
1729         if (!check_key) {
1730                 param = __iscsi_check_key(keyvalue, sender, param_list);
1731                 if (!param)
1732                         return -1;
1733         } else {
1734                 param = iscsi_check_key(keyvalue, 0, sender, param_list);
1735                 if (!param)
1736                         return -1;
1737
1738                 param->set_param = 1;
1739                 if (iscsi_check_value(param, value) < 0) {
1740                         param->set_param = 0;
1741                         return -1;
1742                 }
1743                 param->set_param = 0;
1744         }
1745
1746         if (iscsi_update_param_value(param, value) < 0)
1747                 return -1;
1748
1749         return 0;
1750 }
1751
1752 void iscsi_set_connection_parameters(
1753         struct iscsi_conn_ops *ops,
1754         struct iscsi_param_list *param_list)
1755 {
1756         char *tmpptr;
1757         struct iscsi_param *param;
1758
1759         pr_debug("---------------------------------------------------"
1760                         "---------------\n");
1761         list_for_each_entry(param, &param_list->param_list, p_list) {
1762                 /*
1763                  * Special case to set MAXXMITDATASEGMENTLENGTH from the
1764                  * target requested MaxRecvDataSegmentLength, even though
1765                  * this key is not sent over the wire.
1766                  */
1767                 if (!strcmp(param->name, MAXXMITDATASEGMENTLENGTH)) {
1768                         ops->MaxXmitDataSegmentLength =
1769                                 simple_strtoul(param->value, &tmpptr, 0);
1770                         pr_debug("MaxXmitDataSegmentLength:     %s\n",
1771                                 param->value);
1772                 }
1773
1774                 if (!IS_PSTATE_ACCEPTOR(param) && !IS_PSTATE_PROPOSER(param))
1775                         continue;
1776                 if (!strcmp(param->name, AUTHMETHOD)) {
1777                         pr_debug("AuthMethod:                   %s\n",
1778                                 param->value);
1779                 } else if (!strcmp(param->name, HEADERDIGEST)) {
1780                         ops->HeaderDigest = !strcmp(param->value, CRC32C);
1781                         pr_debug("HeaderDigest:                 %s\n",
1782                                 param->value);
1783                 } else if (!strcmp(param->name, DATADIGEST)) {
1784                         ops->DataDigest = !strcmp(param->value, CRC32C);
1785                         pr_debug("DataDigest:                   %s\n",
1786                                 param->value);
1787                 } else if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) {
1788                         /*
1789                          * At this point iscsi_check_acceptor_state() will have
1790                          * set ops->MaxRecvDataSegmentLength from the original
1791                          * initiator provided value.
1792                          */
1793                         pr_debug("MaxRecvDataSegmentLength:     %u\n",
1794                                 ops->MaxRecvDataSegmentLength);
1795                 } else if (!strcmp(param->name, OFMARKER)) {
1796                         ops->OFMarker = !strcmp(param->value, YES);
1797                         pr_debug("OFMarker:                     %s\n",
1798                                 param->value);
1799                 } else if (!strcmp(param->name, IFMARKER)) {
1800                         ops->IFMarker = !strcmp(param->value, YES);
1801                         pr_debug("IFMarker:                     %s\n",
1802                                 param->value);
1803                 } else if (!strcmp(param->name, OFMARKINT)) {
1804                         ops->OFMarkInt =
1805                                 simple_strtoul(param->value, &tmpptr, 0);
1806                         pr_debug("OFMarkInt:                    %s\n",
1807                                 param->value);
1808                 } else if (!strcmp(param->name, IFMARKINT)) {
1809                         ops->IFMarkInt =
1810                                 simple_strtoul(param->value, &tmpptr, 0);
1811                         pr_debug("IFMarkInt:                    %s\n",
1812                                 param->value);
1813                 }
1814         }
1815         pr_debug("----------------------------------------------------"
1816                         "--------------\n");
1817 }
1818
1819 void iscsi_set_session_parameters(
1820         struct iscsi_sess_ops *ops,
1821         struct iscsi_param_list *param_list,
1822         int leading)
1823 {
1824         char *tmpptr;
1825         struct iscsi_param *param;
1826
1827         pr_debug("----------------------------------------------------"
1828                         "--------------\n");
1829         list_for_each_entry(param, &param_list->param_list, p_list) {
1830                 if (!IS_PSTATE_ACCEPTOR(param) && !IS_PSTATE_PROPOSER(param))
1831                         continue;
1832                 if (!strcmp(param->name, INITIATORNAME)) {
1833                         if (!param->value)
1834                                 continue;
1835                         if (leading)
1836                                 snprintf(ops->InitiatorName,
1837                                                 sizeof(ops->InitiatorName),
1838                                                 "%s", param->value);
1839                         pr_debug("InitiatorName:                %s\n",
1840                                 param->value);
1841                 } else if (!strcmp(param->name, INITIATORALIAS)) {
1842                         if (!param->value)
1843                                 continue;
1844                         snprintf(ops->InitiatorAlias,
1845                                                 sizeof(ops->InitiatorAlias),
1846                                                 "%s", param->value);
1847                         pr_debug("InitiatorAlias:               %s\n",
1848                                 param->value);
1849                 } else if (!strcmp(param->name, TARGETNAME)) {
1850                         if (!param->value)
1851                                 continue;
1852                         if (leading)
1853                                 snprintf(ops->TargetName,
1854                                                 sizeof(ops->TargetName),
1855                                                 "%s", param->value);
1856                         pr_debug("TargetName:                   %s\n",
1857                                 param->value);
1858                 } else if (!strcmp(param->name, TARGETALIAS)) {
1859                         if (!param->value)
1860                                 continue;
1861                         snprintf(ops->TargetAlias, sizeof(ops->TargetAlias),
1862                                         "%s", param->value);
1863                         pr_debug("TargetAlias:                  %s\n",
1864                                 param->value);
1865                 } else if (!strcmp(param->name, TARGETPORTALGROUPTAG)) {
1866                         ops->TargetPortalGroupTag =
1867                                 simple_strtoul(param->value, &tmpptr, 0);
1868                         pr_debug("TargetPortalGroupTag:         %s\n",
1869                                 param->value);
1870                 } else if (!strcmp(param->name, MAXCONNECTIONS)) {
1871                         ops->MaxConnections =
1872                                 simple_strtoul(param->value, &tmpptr, 0);
1873                         pr_debug("MaxConnections:               %s\n",
1874                                 param->value);
1875                 } else if (!strcmp(param->name, INITIALR2T)) {
1876                         ops->InitialR2T = !strcmp(param->value, YES);
1877                          pr_debug("InitialR2T:                   %s\n",
1878                                 param->value);
1879                 } else if (!strcmp(param->name, IMMEDIATEDATA)) {
1880                         ops->ImmediateData = !strcmp(param->value, YES);
1881                         pr_debug("ImmediateData:                %s\n",
1882                                 param->value);
1883                 } else if (!strcmp(param->name, MAXBURSTLENGTH)) {
1884                         ops->MaxBurstLength =
1885                                 simple_strtoul(param->value, &tmpptr, 0);
1886                         pr_debug("MaxBurstLength:               %s\n",
1887                                 param->value);
1888                 } else if (!strcmp(param->name, FIRSTBURSTLENGTH)) {
1889                         ops->FirstBurstLength =
1890                                 simple_strtoul(param->value, &tmpptr, 0);
1891                         pr_debug("FirstBurstLength:             %s\n",
1892                                 param->value);
1893                 } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) {
1894                         ops->DefaultTime2Wait =
1895                                 simple_strtoul(param->value, &tmpptr, 0);
1896                         pr_debug("DefaultTime2Wait:             %s\n",
1897                                 param->value);
1898                 } else if (!strcmp(param->name, DEFAULTTIME2RETAIN)) {
1899                         ops->DefaultTime2Retain =
1900                                 simple_strtoul(param->value, &tmpptr, 0);
1901                         pr_debug("DefaultTime2Retain:           %s\n",
1902                                 param->value);
1903                 } else if (!strcmp(param->name, MAXOUTSTANDINGR2T)) {
1904                         ops->MaxOutstandingR2T =
1905                                 simple_strtoul(param->value, &tmpptr, 0);
1906                         pr_debug("MaxOutstandingR2T:            %s\n",
1907                                 param->value);
1908                 } else if (!strcmp(param->name, DATAPDUINORDER)) {
1909                         ops->DataPDUInOrder = !strcmp(param->value, YES);
1910                         pr_debug("DataPDUInOrder:               %s\n",
1911                                 param->value);
1912                 } else if (!strcmp(param->name, DATASEQUENCEINORDER)) {
1913                         ops->DataSequenceInOrder = !strcmp(param->value, YES);
1914                         pr_debug("DataSequenceInOrder:          %s\n",
1915                                 param->value);
1916                 } else if (!strcmp(param->name, ERRORRECOVERYLEVEL)) {
1917                         ops->ErrorRecoveryLevel =
1918                                 simple_strtoul(param->value, &tmpptr, 0);
1919                         pr_debug("ErrorRecoveryLevel:           %s\n",
1920                                 param->value);
1921                 } else if (!strcmp(param->name, SESSIONTYPE)) {
1922                         ops->SessionType = !strcmp(param->value, DISCOVERY);
1923                         pr_debug("SessionType:                  %s\n",
1924                                 param->value);
1925                 }
1926         }
1927         pr_debug("----------------------------------------------------"
1928                         "--------------\n");
1929
1930 }