kernel/drivers/target/iscsi/iscsi_target_parameters.c

   1 /*******************************************************************************
   2  * This file contains main functions related to iSCSI Parameter negotiation.
   3  *
   4  * (c) Copyright 2007-2013 Datera, Inc.
   5  *
   6  * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  ******************************************************************************/
  18
  19 #include <linux/slab.h>
  20
  21 #include <target/iscsi/iscsi_target_core.h>
  22 #include "iscsi_target_util.h"
  23 #include "iscsi_target_parameters.h"
  24
  25 int iscsi_login_rx_data(
  26         struct iscsi_conn *conn,
  27         char *buf,
  28         int length)
  29 {
  30         int rx_got;
  31         struct kvec iov;
  32
  33         memset(&iov, 0, sizeof(struct kvec));
  34         iov.iov_len     = length;
  35         iov.iov_base    = buf;
  36
  37         /*
  38          * Initial Marker-less Interval.
  39          * Add the values regardless of IFMarker/OFMarker, considering
  40          * it may not be negoitated yet.
  41          */
  42         conn->of_marker += length;
  43
  44         rx_got = rx_data(conn, &iov, 1, length);
  45         if (rx_got != length) {
  46                 pr_err("rx_data returned %d, expecting %d.\n",
  47                                 rx_got, length);
  48                 return -1;
  49         }
  50
  51         return 0 ;
  52 }
  53
  54 int iscsi_login_tx_data(
  55         struct iscsi_conn *conn,
  56         char *pdu_buf,
  57         char *text_buf,
  58         int text_length)
  59 {
  60         int length, tx_sent, iov_cnt = 1;
  61         struct kvec iov[2];
  62
  63         length = (ISCSI_HDR_LEN + text_length);
  64
  65         memset(&iov[0], 0, 2 * sizeof(struct kvec));
  66         iov[0].iov_len          = ISCSI_HDR_LEN;
  67         iov[0].iov_base         = pdu_buf;
  68
  69         if (text_buf && text_length) {
  70                 iov[1].iov_len  = text_length;
  71                 iov[1].iov_base = text_buf;
  72                 iov_cnt++;
  73         }
  74
  75         /*
  76          * Initial Marker-less Interval.
  77          * Add the values regardless of IFMarker/OFMarker, considering
  78          * it may not be negoitated yet.
  79          */
  80         conn->if_marker += length;
  81
  82         tx_sent = tx_data(conn, &iov[0], iov_cnt, length);
  83         if (tx_sent != length) {
  84                 pr_err("tx_data returned %d, expecting %d.\n",
  85                                 tx_sent, length);
  86                 return -1;
  87         }
  88
  89         return 0;
  90 }
  91
  92 void iscsi_dump_conn_ops(struct iscsi_conn_ops *conn_ops)
  93 {
  94         pr_debug("HeaderDigest: %s\n", (conn_ops->HeaderDigest) ?
  95                                 "CRC32C" : "None");
  96         pr_debug("DataDigest: %s\n", (conn_ops->DataDigest) ?
  97                                 "CRC32C" : "None");
  98         pr_debug("MaxRecvDataSegmentLength: %u\n",
  99                                 conn_ops->MaxRecvDataSegmentLength);
 100         pr_debug("OFMarker: %s\n", (conn_ops->OFMarker) ? "Yes" : "No");
 101         pr_debug("IFMarker: %s\n", (conn_ops->IFMarker) ? "Yes" : "No");
 102         if (conn_ops->OFMarker)
 103                 pr_debug("OFMarkInt: %u\n", conn_ops->OFMarkInt);
 104         if (conn_ops->IFMarker)
 105                 pr_debug("IFMarkInt: %u\n", conn_ops->IFMarkInt);
 106 }
 107
 108 void iscsi_dump_sess_ops(struct iscsi_sess_ops *sess_ops)
 109 {
 110         pr_debug("InitiatorName: %s\n", sess_ops->InitiatorName);
 111         pr_debug("InitiatorAlias: %s\n", sess_ops->InitiatorAlias);
 112         pr_debug("TargetName: %s\n", sess_ops->TargetName);
 113         pr_debug("TargetAlias: %s\n", sess_ops->TargetAlias);
 114         pr_debug("TargetPortalGroupTag: %hu\n",
 115                         sess_ops->TargetPortalGroupTag);
 116         pr_debug("MaxConnections: %hu\n", sess_ops->MaxConnections);
 117         pr_debug("InitialR2T: %s\n",
 118                         (sess_ops->InitialR2T) ? "Yes" : "No");
 119         pr_debug("ImmediateData: %s\n", (sess_ops->ImmediateData) ?
 120                         "Yes" : "No");
 121         pr_debug("MaxBurstLength: %u\n", sess_ops->MaxBurstLength);
 122         pr_debug("FirstBurstLength: %u\n", sess_ops->FirstBurstLength);
 123         pr_debug("DefaultTime2Wait: %hu\n", sess_ops->DefaultTime2Wait);
 124         pr_debug("DefaultTime2Retain: %hu\n",
 125                         sess_ops->DefaultTime2Retain);
 126         pr_debug("MaxOutstandingR2T: %hu\n",
 127                         sess_ops->MaxOutstandingR2T);
 128         pr_debug("DataPDUInOrder: %s\n",
 129                         (sess_ops->DataPDUInOrder) ? "Yes" : "No");
 130         pr_debug("DataSequenceInOrder: %s\n",
 131                         (sess_ops->DataSequenceInOrder) ? "Yes" : "No");
 132         pr_debug("ErrorRecoveryLevel: %hu\n",
 133                         sess_ops->ErrorRecoveryLevel);
 134         pr_debug("SessionType: %s\n", (sess_ops->SessionType) ?
 135                         "Discovery" : "Normal");
 136 }
 137
 138 void iscsi_print_params(struct iscsi_param_list *param_list)
 139 {
 140         struct iscsi_param *param;
 141
 142         list_for_each_entry(param, &param_list->param_list, p_list)
 143                 pr_debug("%s: %s\n", param->name, param->value);
 144 }
 145
 146 static struct iscsi_param *iscsi_set_default_param(struct iscsi_param_list *param_list,
 147                 char *name, char *value, u8 phase, u8 scope, u8 sender,
 148                 u16 type_range, u8 use)
 149 {
 150         struct iscsi_param *param = NULL;
 151
 152         param = kzalloc(sizeof(struct iscsi_param), GFP_KERNEL);
 153         if (!param) {
 154                 pr_err("Unable to allocate memory for parameter.\n");
 155                 goto out;
 156         }
 157         INIT_LIST_HEAD(&param->p_list);
 158
 159         param->name = kstrdup(name, GFP_KERNEL);
 160         if (!param->name) {
 161                 pr_err("Unable to allocate memory for parameter name.\n");
 162                 goto out;
 163         }
 164
 165         param->value = kstrdup(value, GFP_KERNEL);
 166         if (!param->value) {
 167                 pr_err("Unable to allocate memory for parameter value.\n");
 168                 goto out;
 169         }
 170
 171         param->phase            = phase;
 172         param->scope            = scope;
 173         param->sender           = sender;
 174         param->use              = use;
 175         param->type_range       = type_range;
 176
 177         switch (param->type_range) {
 178         case TYPERANGE_BOOL_AND:
 179                 param->type = TYPE_BOOL_AND;
 180                 break;
 181         case TYPERANGE_BOOL_OR:
 182                 param->type = TYPE_BOOL_OR;
 183                 break;
 184         case TYPERANGE_0_TO_2:
 185         case TYPERANGE_0_TO_3600:
 186         case TYPERANGE_0_TO_32767:
 187         case TYPERANGE_0_TO_65535:
 188         case TYPERANGE_1_TO_65535:
 189         case TYPERANGE_2_TO_3600:
 190         case TYPERANGE_512_TO_16777215:
 191                 param->type = TYPE_NUMBER;
 192                 break;
 193         case TYPERANGE_AUTH:
 194         case TYPERANGE_DIGEST:
 195                 param->type = TYPE_VALUE_LIST | TYPE_STRING;
 196                 break;
 197         case TYPERANGE_MARKINT:
 198                 param->type = TYPE_NUMBER_RANGE;
 199                 param->type_range |= TYPERANGE_1_TO_65535;
 200                 break;
 201         case TYPERANGE_ISCSINAME:
 202         case TYPERANGE_SESSIONTYPE:
 203         case TYPERANGE_TARGETADDRESS:
 204         case TYPERANGE_UTF8:
 205                 param->type = TYPE_STRING;
 206                 break;
 207         default:
 208                 pr_err("Unknown type_range 0x%02x\n",
 209                                 param->type_range);
 210                 goto out;
 211         }
 212         list_add_tail(&param->p_list, &param_list->param_list);
 213
 214         return param;
 215 out:
 216         if (param) {
 217                 kfree(param->value);
 218                 kfree(param->name);
 219                 kfree(param);
 220         }
 221
 222         return NULL;
 223 }
 224
 225 /* #warning Add extension keys */
 226 int iscsi_create_default_params(struct iscsi_param_list **param_list_ptr)
 227 {
 228         struct iscsi_param *param = NULL;
 229         struct iscsi_param_list *pl;
 230
 231         pl = kzalloc(sizeof(struct iscsi_param_list), GFP_KERNEL);
 232         if (!pl) {
 233                 pr_err("Unable to allocate memory for"
 234                                 " struct iscsi_param_list.\n");
 235                 return -1 ;
 236         }
 237         INIT_LIST_HEAD(&pl->param_list);
 238         INIT_LIST_HEAD(&pl->extra_response_list);
 239
 240         /*
 241          * The format for setting the initial parameter definitions are:
 242          *
 243          * Parameter name:
 244          * Initial value:
 245          * Allowable phase:
 246          * Scope:
 247          * Allowable senders:
 248          * Typerange:
 249          * Use:
 250          */
 251         param = iscsi_set_default_param(pl, AUTHMETHOD, INITIAL_AUTHMETHOD,
 252                         PHASE_SECURITY, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
 253                         TYPERANGE_AUTH, USE_INITIAL_ONLY);
 254         if (!param)
 255                 goto out;
 256
 257         param = iscsi_set_default_param(pl, HEADERDIGEST, INITIAL_HEADERDIGEST,
 258                         PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
 259                         TYPERANGE_DIGEST, USE_INITIAL_ONLY);
 260         if (!param)
 261                 goto out;
 262
 263         param = iscsi_set_default_param(pl, DATADIGEST, INITIAL_DATADIGEST,
 264                         PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
 265                         TYPERANGE_DIGEST, USE_INITIAL_ONLY);
 266         if (!param)
 267                 goto out;
 268
 269         param = iscsi_set_default_param(pl, MAXCONNECTIONS,
 270                         INITIAL_MAXCONNECTIONS, PHASE_OPERATIONAL,
 271                         SCOPE_SESSION_WIDE, SENDER_BOTH,
 272                         TYPERANGE_1_TO_65535, USE_LEADING_ONLY);
 273         if (!param)
 274                 goto out;
 275
 276         param = iscsi_set_default_param(pl, SENDTARGETS, INITIAL_SENDTARGETS,
 277                         PHASE_FFP0, SCOPE_SESSION_WIDE, SENDER_INITIATOR,
 278                         TYPERANGE_UTF8, 0);
 279         if (!param)
 280                 goto out;
 281
 282         param = iscsi_set_default_param(pl, TARGETNAME, INITIAL_TARGETNAME,
 283                         PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_BOTH,
 284                         TYPERANGE_ISCSINAME, USE_ALL);
 285         if (!param)
 286                 goto out;
 287
 288         param = iscsi_set_default_param(pl, INITIATORNAME,
 289                         INITIAL_INITIATORNAME, PHASE_DECLARATIVE,
 290                         SCOPE_SESSION_WIDE, SENDER_INITIATOR,
 291                         TYPERANGE_ISCSINAME, USE_INITIAL_ONLY);
 292         if (!param)
 293                 goto out;
 294
 295         param = iscsi_set_default_param(pl, TARGETALIAS, INITIAL_TARGETALIAS,
 296                         PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_TARGET,
 297                         TYPERANGE_UTF8, USE_ALL);
 298         if (!param)
 299                 goto out;
 300
 301         param = iscsi_set_default_param(pl, INITIATORALIAS,
 302                         INITIAL_INITIATORALIAS, PHASE_DECLARATIVE,
 303                         SCOPE_SESSION_WIDE, SENDER_INITIATOR, TYPERANGE_UTF8,
 304                         USE_ALL);
 305         if (!param)
 306                 goto out;
 307
 308         param = iscsi_set_default_param(pl, TARGETADDRESS,
 309                         INITIAL_TARGETADDRESS, PHASE_DECLARATIVE,
 310                         SCOPE_SESSION_WIDE, SENDER_TARGET,
 311                         TYPERANGE_TARGETADDRESS, USE_ALL);
 312         if (!param)
 313                 goto out;
 314
 315         param = iscsi_set_default_param(pl, TARGETPORTALGROUPTAG,
 316                         INITIAL_TARGETPORTALGROUPTAG,
 317                         PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_TARGET,
 318                         TYPERANGE_0_TO_65535, USE_INITIAL_ONLY);
 319         if (!param)
 320                 goto out;
 321
 322         param = iscsi_set_default_param(pl, INITIALR2T, INITIAL_INITIALR2T,
 323                         PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
 324                         TYPERANGE_BOOL_OR, USE_LEADING_ONLY);
 325         if (!param)
 326                 goto out;
 327
 328         param = iscsi_set_default_param(pl, IMMEDIATEDATA,
 329                         INITIAL_IMMEDIATEDATA, PHASE_OPERATIONAL,
 330                         SCOPE_SESSION_WIDE, SENDER_BOTH, TYPERANGE_BOOL_AND,
 331                         USE_LEADING_ONLY);
 332         if (!param)
 333                 goto out;
 334
 335         param = iscsi_set_default_param(pl, MAXXMITDATASEGMENTLENGTH,
 336                         INITIAL_MAXXMITDATASEGMENTLENGTH,
 337                         PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
 338                         TYPERANGE_512_TO_16777215, USE_ALL);
 339         if (!param)
 340                 goto out;
 341
 342         param = iscsi_set_default_param(pl, MAXRECVDATASEGMENTLENGTH,
 343                         INITIAL_MAXRECVDATASEGMENTLENGTH,
 344                         PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
 345                         TYPERANGE_512_TO_16777215, USE_ALL);
 346         if (!param)
 347                 goto out;
 348
 349         param = iscsi_set_default_param(pl, MAXBURSTLENGTH,
 350                         INITIAL_MAXBURSTLENGTH, PHASE_OPERATIONAL,
 351                         SCOPE_SESSION_WIDE, SENDER_BOTH,
 352                         TYPERANGE_512_TO_16777215, USE_LEADING_ONLY);
 353         if (!param)
 354                 goto out;
 355
 356         param = iscsi_set_default_param(pl, FIRSTBURSTLENGTH,
 357                         INITIAL_FIRSTBURSTLENGTH,
 358                         PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
 359                         TYPERANGE_512_TO_16777215, USE_LEADING_ONLY);
 360         if (!param)
 361                 goto out;
 362
 363         param = iscsi_set_default_param(pl, DEFAULTTIME2WAIT,
 364                         INITIAL_DEFAULTTIME2WAIT,
 365                         PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
 366                         TYPERANGE_0_TO_3600, USE_LEADING_ONLY);
 367         if (!param)
 368                 goto out;
 369
 370         param = iscsi_set_default_param(pl, DEFAULTTIME2RETAIN,
 371                         INITIAL_DEFAULTTIME2RETAIN,
 372                         PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
 373                         TYPERANGE_0_TO_3600, USE_LEADING_ONLY);
 374         if (!param)
 375                 goto out;
 376
 377         param = iscsi_set_default_param(pl, MAXOUTSTANDINGR2T,
 378                         INITIAL_MAXOUTSTANDINGR2T,
 379                         PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
 380                         TYPERANGE_1_TO_65535, USE_LEADING_ONLY);
 381         if (!param)
 382                 goto out;
 383
 384         param = iscsi_set_default_param(pl, DATAPDUINORDER,
 385                         INITIAL_DATAPDUINORDER, PHASE_OPERATIONAL,
 386                         SCOPE_SESSION_WIDE, SENDER_BOTH, TYPERANGE_BOOL_OR,
 387                         USE_LEADING_ONLY);
 388         if (!param)
 389                 goto out;
 390
 391         param = iscsi_set_default_param(pl, DATASEQUENCEINORDER,
 392                         INITIAL_DATASEQUENCEINORDER,
 393                         PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
 394                         TYPERANGE_BOOL_OR, USE_LEADING_ONLY);
 395         if (!param)
 396                 goto out;
 397
 398         param = iscsi_set_default_param(pl, ERRORRECOVERYLEVEL,
 399                         INITIAL_ERRORRECOVERYLEVEL,
 400                         PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
 401                         TYPERANGE_0_TO_2, USE_LEADING_ONLY);
 402         if (!param)
 403                 goto out;
 404
 405         param = iscsi_set_default_param(pl, SESSIONTYPE, INITIAL_SESSIONTYPE,
 406                         PHASE_DECLARATIVE, SCOPE_SESSION_WIDE, SENDER_INITIATOR,
 407                         TYPERANGE_SESSIONTYPE, USE_LEADING_ONLY);
 408         if (!param)
 409                 goto out;
 410
 411         param = iscsi_set_default_param(pl, IFMARKER, INITIAL_IFMARKER,
 412                         PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
 413                         TYPERANGE_BOOL_AND, USE_INITIAL_ONLY);
 414         if (!param)
 415                 goto out;
 416
 417         param = iscsi_set_default_param(pl, OFMARKER, INITIAL_OFMARKER,
 418                         PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
 419                         TYPERANGE_BOOL_AND, USE_INITIAL_ONLY);
 420         if (!param)
 421                 goto out;
 422
 423         param = iscsi_set_default_param(pl, IFMARKINT, INITIAL_IFMARKINT,
 424                         PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
 425                         TYPERANGE_MARKINT, USE_INITIAL_ONLY);
 426         if (!param)
 427                 goto out;
 428
 429         param = iscsi_set_default_param(pl, OFMARKINT, INITIAL_OFMARKINT,
 430                         PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
 431                         TYPERANGE_MARKINT, USE_INITIAL_ONLY);
 432         if (!param)
 433                 goto out;
 434         /*
 435          * Extra parameters for ISER from RFC-5046
 436          */
 437         param = iscsi_set_default_param(pl, RDMAEXTENSIONS, INITIAL_RDMAEXTENSIONS,
 438                         PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
 439                         TYPERANGE_BOOL_AND, USE_LEADING_ONLY);
 440         if (!param)
 441                 goto out;
 442
 443         param = iscsi_set_default_param(pl, INITIATORRECVDATASEGMENTLENGTH,
 444                         INITIAL_INITIATORRECVDATASEGMENTLENGTH,
 445                         PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
 446                         TYPERANGE_512_TO_16777215, USE_ALL);
 447         if (!param)
 448                 goto out;
 449
 450         param = iscsi_set_default_param(pl, TARGETRECVDATASEGMENTLENGTH,
 451                         INITIAL_TARGETRECVDATASEGMENTLENGTH,
 452                         PHASE_OPERATIONAL, SCOPE_CONNECTION_ONLY, SENDER_BOTH,
 453                         TYPERANGE_512_TO_16777215, USE_ALL);
 454         if (!param)
 455                 goto out;
 456
 457         *param_list_ptr = pl;
 458         return 0;
 459 out:
 460         iscsi_release_param_list(pl);
 461         return -1;
 462 }
 463
 464 int iscsi_set_keys_to_negotiate(
 465         struct iscsi_param_list *param_list,
 466         bool iser)
 467 {
 468         struct iscsi_param *param;
 469
 470         param_list->iser = iser;
 471
 472         list_for_each_entry(param, &param_list->param_list, p_list) {
 473                 param->state = 0;
 474                 if (!strcmp(param->name, AUTHMETHOD)) {
 475                         SET_PSTATE_NEGOTIATE(param);
 476                 } else if (!strcmp(param->name, HEADERDIGEST)) {
 477                         if (!iser)
 478                                 SET_PSTATE_NEGOTIATE(param);
 479                 } else if (!strcmp(param->name, DATADIGEST)) {
 480                         if (!iser)
 481                                 SET_PSTATE_NEGOTIATE(param);
 482                 } else if (!strcmp(param->name, MAXCONNECTIONS)) {
 483                         SET_PSTATE_NEGOTIATE(param);
 484                 } else if (!strcmp(param->name, TARGETNAME)) {
 485                         continue;
 486                 } else if (!strcmp(param->name, INITIATORNAME)) {
 487                         continue;
 488                 } else if (!strcmp(param->name, TARGETALIAS)) {
 489                         if (param->value)
 490                                 SET_PSTATE_NEGOTIATE(param);
 491                 } else if (!strcmp(param->name, INITIATORALIAS)) {
 492                         continue;
 493                 } else if (!strcmp(param->name, TARGETPORTALGROUPTAG)) {
 494                         SET_PSTATE_NEGOTIATE(param);
 495                 } else if (!strcmp(param->name, INITIALR2T)) {
 496                         SET_PSTATE_NEGOTIATE(param);
 497                 } else if (!strcmp(param->name, IMMEDIATEDATA)) {
 498                         SET_PSTATE_NEGOTIATE(param);
 499                 } else if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) {
 500                         if (!iser)
 501                                 SET_PSTATE_NEGOTIATE(param);
 502                 } else if (!strcmp(param->name, MAXXMITDATASEGMENTLENGTH)) {
 503                         continue;
 504                 } else if (!strcmp(param->name, MAXBURSTLENGTH)) {
 505                         SET_PSTATE_NEGOTIATE(param);
 506                 } else if (!strcmp(param->name, FIRSTBURSTLENGTH)) {
 507                         SET_PSTATE_NEGOTIATE(param);
 508                 } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) {
 509                         SET_PSTATE_NEGOTIATE(param);
 510                 } else if (!strcmp(param->name, DEFAULTTIME2RETAIN)) {
 511                         SET_PSTATE_NEGOTIATE(param);
 512                 } else if (!strcmp(param->name, MAXOUTSTANDINGR2T)) {
 513                         SET_PSTATE_NEGOTIATE(param);
 514                 } else if (!strcmp(param->name, DATAPDUINORDER)) {
 515                         SET_PSTATE_NEGOTIATE(param);
 516                 } else if (!strcmp(param->name, DATASEQUENCEINORDER)) {
 517                         SET_PSTATE_NEGOTIATE(param);
 518                 } else if (!strcmp(param->name, ERRORRECOVERYLEVEL)) {
 519                         SET_PSTATE_NEGOTIATE(param);
 520                 } else if (!strcmp(param->name, SESSIONTYPE)) {
 521                         SET_PSTATE_NEGOTIATE(param);
 522                 } else if (!strcmp(param->name, IFMARKER)) {
 523                         SET_PSTATE_NEGOTIATE(param);
 524                 } else if (!strcmp(param->name, OFMARKER)) {
 525                         SET_PSTATE_NEGOTIATE(param);
 526                 } else if (!strcmp(param->name, IFMARKINT)) {
 527                         SET_PSTATE_NEGOTIATE(param);
 528                 } else if (!strcmp(param->name, OFMARKINT)) {
 529                         SET_PSTATE_NEGOTIATE(param);
 530                 } else if (!strcmp(param->name, RDMAEXTENSIONS)) {
 531                         if (iser)
 532                                 SET_PSTATE_NEGOTIATE(param);
 533                 } else if (!strcmp(param->name, INITIATORRECVDATASEGMENTLENGTH)) {
 534                         if (iser)
 535                                 SET_PSTATE_NEGOTIATE(param);
 536                 } else if (!strcmp(param->name, TARGETRECVDATASEGMENTLENGTH)) {
 537                         if (iser)
 538                                 SET_PSTATE_NEGOTIATE(param);
 539                 }
 540         }
 541
 542         return 0;
 543 }
 544
 545 int iscsi_set_keys_irrelevant_for_discovery(
 546         struct iscsi_param_list *param_list)
 547 {
 548         struct iscsi_param *param;
 549
 550         list_for_each_entry(param, &param_list->param_list, p_list) {
 551                 if (!strcmp(param->name, MAXCONNECTIONS))
 552                         param->state &= ~PSTATE_NEGOTIATE;
 553                 else if (!strcmp(param->name, INITIALR2T))
 554                         param->state &= ~PSTATE_NEGOTIATE;
 555                 else if (!strcmp(param->name, IMMEDIATEDATA))
 556                         param->state &= ~PSTATE_NEGOTIATE;
 557                 else if (!strcmp(param->name, MAXBURSTLENGTH))
 558                         param->state &= ~PSTATE_NEGOTIATE;
 559                 else if (!strcmp(param->name, FIRSTBURSTLENGTH))
 560                         param->state &= ~PSTATE_NEGOTIATE;
 561                 else if (!strcmp(param->name, MAXOUTSTANDINGR2T))
 562                         param->state &= ~PSTATE_NEGOTIATE;
 563                 else if (!strcmp(param->name, DATAPDUINORDER))
 564                         param->state &= ~PSTATE_NEGOTIATE;
 565                 else if (!strcmp(param->name, DATASEQUENCEINORDER))
 566                         param->state &= ~PSTATE_NEGOTIATE;
 567                 else if (!strcmp(param->name, ERRORRECOVERYLEVEL))
 568                         param->state &= ~PSTATE_NEGOTIATE;
 569                 else if (!strcmp(param->name, DEFAULTTIME2WAIT))
 570                         param->state &= ~PSTATE_NEGOTIATE;
 571                 else if (!strcmp(param->name, DEFAULTTIME2RETAIN))
 572                         param->state &= ~PSTATE_NEGOTIATE;
 573                 else if (!strcmp(param->name, IFMARKER))
 574                         param->state &= ~PSTATE_NEGOTIATE;
 575                 else if (!strcmp(param->name, OFMARKER))
 576                         param->state &= ~PSTATE_NEGOTIATE;
 577                 else if (!strcmp(param->name, IFMARKINT))
 578                         param->state &= ~PSTATE_NEGOTIATE;
 579                 else if (!strcmp(param->name, OFMARKINT))
 580                         param->state &= ~PSTATE_NEGOTIATE;
 581                 else if (!strcmp(param->name, RDMAEXTENSIONS))
 582                         param->state &= ~PSTATE_NEGOTIATE;
 583                 else if (!strcmp(param->name, INITIATORRECVDATASEGMENTLENGTH))
 584                         param->state &= ~PSTATE_NEGOTIATE;
 585                 else if (!strcmp(param->name, TARGETRECVDATASEGMENTLENGTH))
 586                         param->state &= ~PSTATE_NEGOTIATE;
 587         }
 588
 589         return 0;
 590 }
 591
 592 int iscsi_copy_param_list(
 593         struct iscsi_param_list **dst_param_list,
 594         struct iscsi_param_list *src_param_list,
 595         int leading)
 596 {
 597         struct iscsi_param *param = NULL;
 598         struct iscsi_param *new_param = NULL;
 599         struct iscsi_param_list *param_list = NULL;
 600
 601         param_list = kzalloc(sizeof(struct iscsi_param_list), GFP_KERNEL);
 602         if (!param_list) {
 603                 pr_err("Unable to allocate memory for struct iscsi_param_list.\n");
 604                 return -1;
 605         }
 606         INIT_LIST_HEAD(&param_list->param_list);
 607         INIT_LIST_HEAD(&param_list->extra_response_list);
 608
 609         list_for_each_entry(param, &src_param_list->param_list, p_list) {
 610                 if (!leading && (param->scope & SCOPE_SESSION_WIDE)) {
 611                         if ((strcmp(param->name, "TargetName") != 0) &&
 612                             (strcmp(param->name, "InitiatorName") != 0) &&
 613                             (strcmp(param->name, "TargetPortalGroupTag") != 0))
 614                                 continue;
 615                 }
 616
 617                 new_param = kzalloc(sizeof(struct iscsi_param), GFP_KERNEL);
 618                 if (!new_param) {
 619                         pr_err("Unable to allocate memory for struct iscsi_param.\n");
 620                         goto err_out;
 621                 }
 622
 623                 new_param->name = kstrdup(param->name, GFP_KERNEL);
 624                 new_param->value = kstrdup(param->value, GFP_KERNEL);
 625                 if (!new_param->value || !new_param->name) {
 626                         kfree(new_param->value);
 627                         kfree(new_param->name);
 628                         kfree(new_param);
 629                         pr_err("Unable to allocate memory for parameter name/value.\n");
 630                         goto err_out;
 631                 }
 632
 633                 new_param->set_param = param->set_param;
 634                 new_param->phase = param->phase;
 635                 new_param->scope = param->scope;
 636                 new_param->sender = param->sender;
 637                 new_param->type = param->type;
 638                 new_param->use = param->use;
 639                 new_param->type_range = param->type_range;
 640
 641                 list_add_tail(&new_param->p_list, &param_list->param_list);
 642         }
 643
 644         if (!list_empty(&param_list->param_list)) {
 645                 *dst_param_list = param_list;
 646         } else {
 647                 pr_err("No parameters allocated.\n");
 648                 goto err_out;
 649         }
 650
 651         return 0;
 652
 653 err_out:
 654         iscsi_release_param_list(param_list);
 655         return -1;
 656 }
 657
 658 static void iscsi_release_extra_responses(struct iscsi_param_list *param_list)
 659 {
 660         struct iscsi_extra_response *er, *er_tmp;
 661
 662         list_for_each_entry_safe(er, er_tmp, &param_list->extra_response_list,
 663                         er_list) {
 664                 list_del(&er->er_list);
 665                 kfree(er);
 666         }
 667 }
 668
 669 void iscsi_release_param_list(struct iscsi_param_list *param_list)
 670 {
 671         struct iscsi_param *param, *param_tmp;
 672
 673         list_for_each_entry_safe(param, param_tmp, &param_list->param_list,
 674                         p_list) {
 675                 list_del(&param->p_list);
 676
 677                 kfree(param->name);
 678                 kfree(param->value);
 679                 kfree(param);
 680         }
 681
 682         iscsi_release_extra_responses(param_list);
 683
 684         kfree(param_list);
 685 }
 686
 687 struct iscsi_param *iscsi_find_param_from_key(
 688         char *key,
 689         struct iscsi_param_list *param_list)
 690 {
 691         struct iscsi_param *param;
 692
 693         if (!key || !param_list) {
 694                 pr_err("Key or parameter list pointer is NULL.\n");
 695                 return NULL;
 696         }
 697
 698         list_for_each_entry(param, &param_list->param_list, p_list) {
 699                 if (!strcmp(key, param->name))
 700                         return param;
 701         }
 702
 703         pr_err("Unable to locate key \"%s\".\n", key);
 704         return NULL;
 705 }
 706
 707 int iscsi_extract_key_value(char *textbuf, char **key, char **value)
 708 {
 709         *value = strchr(textbuf, '=');
 710         if (!*value) {
 711                 pr_err("Unable to locate \"=\" separator for key,"
 712                                 " ignoring request.\n");
 713                 return -1;
 714         }
 715
 716         *key = textbuf;
 717         **value = '\0';
 718         *value = *value + 1;
 719
 720         return 0;
 721 }
 722
 723 int iscsi_update_param_value(struct iscsi_param *param, char *value)
 724 {
 725         kfree(param->value);
 726
 727         param->value = kstrdup(value, GFP_KERNEL);
 728         if (!param->value) {
 729                 pr_err("Unable to allocate memory for value.\n");
 730                 return -ENOMEM;
 731         }
 732
 733         pr_debug("iSCSI Parameter updated to %s=%s\n",
 734                         param->name, param->value);
 735         return 0;
 736 }
 737
 738 static int iscsi_add_notunderstood_response(
 739         char *key,
 740         char *value,
 741         struct iscsi_param_list *param_list)
 742 {
 743         struct iscsi_extra_response *extra_response;
 744
 745         if (strlen(value) > VALUE_MAXLEN) {
 746                 pr_err("Value for notunderstood key \"%s\" exceeds %d,"
 747                         " protocol error.\n", key, VALUE_MAXLEN);
 748                 return -1;
 749         }
 750
 751         extra_response = kzalloc(sizeof(struct iscsi_extra_response), GFP_KERNEL);
 752         if (!extra_response) {
 753                 pr_err("Unable to allocate memory for"
 754                         " struct iscsi_extra_response.\n");
 755                 return -1;
 756         }
 757         INIT_LIST_HEAD(&extra_response->er_list);
 758
 759         strlcpy(extra_response->key, key, sizeof(extra_response->key));
 760         strlcpy(extra_response->value, NOTUNDERSTOOD,
 761                 sizeof(extra_response->value));
 762
 763         list_add_tail(&extra_response->er_list,
 764                         &param_list->extra_response_list);
 765         return 0;
 766 }
 767
 768 static int iscsi_check_for_auth_key(char *key)
 769 {
 770         /*
 771          * RFC 1994
 772          */
 773         if (!strcmp(key, "CHAP_A") || !strcmp(key, "CHAP_I") ||
 774             !strcmp(key, "CHAP_C") || !strcmp(key, "CHAP_N") ||
 775             !strcmp(key, "CHAP_R"))
 776                 return 1;
 777
 778         /*
 779          * RFC 2945
 780          */
 781         if (!strcmp(key, "SRP_U") || !strcmp(key, "SRP_N") ||
 782             !strcmp(key, "SRP_g") || !strcmp(key, "SRP_s") ||
 783             !strcmp(key, "SRP_A") || !strcmp(key, "SRP_B") ||
 784             !strcmp(key, "SRP_M") || !strcmp(key, "SRP_HM"))
 785                 return 1;
 786
 787         return 0;
 788 }
 789
 790 static void iscsi_check_proposer_for_optional_reply(struct iscsi_param *param)
 791 {
 792         if (IS_TYPE_BOOL_AND(param)) {
 793                 if (!strcmp(param->value, NO))
 794                         SET_PSTATE_REPLY_OPTIONAL(param);
 795         } else if (IS_TYPE_BOOL_OR(param)) {
 796                 if (!strcmp(param->value, YES))
 797                         SET_PSTATE_REPLY_OPTIONAL(param);
 798                  /*
 799                   * Required for gPXE iSCSI boot client
 800                   */
 801                 if (!strcmp(param->name, IMMEDIATEDATA))
 802                         SET_PSTATE_REPLY_OPTIONAL(param);
 803         } else if (IS_TYPE_NUMBER(param)) {
 804                 if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH))
 805                         SET_PSTATE_REPLY_OPTIONAL(param);
 806                 /*
 807                  * The GlobalSAN iSCSI Initiator for MacOSX does
 808                  * not respond to MaxBurstLength, FirstBurstLength,
 809                  * DefaultTime2Wait or DefaultTime2Retain parameter keys.
 810                  * So, we set them to 'reply optional' here, and assume the
 811                  * the defaults from iscsi_parameters.h if the initiator
 812                  * is not RFC compliant and the keys are not negotiated.
 813                  */
 814                 if (!strcmp(param->name, MAXBURSTLENGTH))
 815                         SET_PSTATE_REPLY_OPTIONAL(param);
 816                 if (!strcmp(param->name, FIRSTBURSTLENGTH))
 817                         SET_PSTATE_REPLY_OPTIONAL(param);
 818                 if (!strcmp(param->name, DEFAULTTIME2WAIT))
 819                         SET_PSTATE_REPLY_OPTIONAL(param);
 820                 if (!strcmp(param->name, DEFAULTTIME2RETAIN))
 821                         SET_PSTATE_REPLY_OPTIONAL(param);
 822                 /*
 823                  * Required for gPXE iSCSI boot client
 824                  */
 825                 if (!strcmp(param->name, MAXCONNECTIONS))
 826                         SET_PSTATE_REPLY_OPTIONAL(param);
 827         } else if (IS_PHASE_DECLARATIVE(param))
 828                 SET_PSTATE_REPLY_OPTIONAL(param);
 829 }
 830
 831 static int iscsi_check_boolean_value(struct iscsi_param *param, char *value)
 832 {
 833         if (strcmp(value, YES) && strcmp(value, NO)) {
 834                 pr_err("Illegal value for \"%s\", must be either"
 835                         " \"%s\" or \"%s\".\n", param->name, YES, NO);
 836                 return -1;
 837         }
 838
 839         return 0;
 840 }
 841
 842 static int iscsi_check_numerical_value(struct iscsi_param *param, char *value_ptr)
 843 {
 844         char *tmpptr;
 845         int value = 0;
 846
 847         value = simple_strtoul(value_ptr, &tmpptr, 0);
 848
 849         if (IS_TYPERANGE_0_TO_2(param)) {
 850                 if ((value < 0) || (value > 2)) {
 851                         pr_err("Illegal value for \"%s\", must be"
 852                                 " between 0 and 2.\n", param->name);
 853                         return -1;
 854                 }
 855                 return 0;
 856         }
 857         if (IS_TYPERANGE_0_TO_3600(param)) {
 858                 if ((value < 0) || (value > 3600)) {
 859                         pr_err("Illegal value for \"%s\", must be"
 860                                 " between 0 and 3600.\n", param->name);
 861                         return -1;
 862                 }
 863                 return 0;
 864         }
 865         if (IS_TYPERANGE_0_TO_32767(param)) {
 866                 if ((value < 0) || (value > 32767)) {
 867                         pr_err("Illegal value for \"%s\", must be"
 868                                 " between 0 and 32767.\n", param->name);
 869                         return -1;
 870                 }
 871                 return 0;
 872         }
 873         if (IS_TYPERANGE_0_TO_65535(param)) {
 874                 if ((value < 0) || (value > 65535)) {
 875                         pr_err("Illegal value for \"%s\", must be"
 876                                 " between 0 and 65535.\n", param->name);
 877                         return -1;
 878                 }
 879                 return 0;
 880         }
 881         if (IS_TYPERANGE_1_TO_65535(param)) {
 882                 if ((value < 1) || (value > 65535)) {
 883                         pr_err("Illegal value for \"%s\", must be"
 884                                 " between 1 and 65535.\n", param->name);
 885                         return -1;
 886                 }
 887                 return 0;
 888         }
 889         if (IS_TYPERANGE_2_TO_3600(param)) {
 890                 if ((value < 2) || (value > 3600)) {
 891                         pr_err("Illegal value for \"%s\", must be"
 892                                 " between 2 and 3600.\n", param->name);
 893                         return -1;
 894                 }
 895                 return 0;
 896         }
 897         if (IS_TYPERANGE_512_TO_16777215(param)) {
 898                 if ((value < 512) || (value > 16777215)) {
 899                         pr_err("Illegal value for \"%s\", must be"
 900                                 " between 512 and 16777215.\n", param->name);
 901                         return -1;
 902                 }
 903                 return 0;
 904         }
 905
 906         return 0;
 907 }
 908
 909 static int iscsi_check_numerical_range_value(struct iscsi_param *param, char *value)
 910 {
 911         char *left_val_ptr = NULL, *right_val_ptr = NULL;
 912         char *tilde_ptr = NULL;
 913         u32 left_val, right_val, local_left_val;
 914
 915         if (strcmp(param->name, IFMARKINT) &&
 916             strcmp(param->name, OFMARKINT)) {
 917                 pr_err("Only parameters \"%s\" or \"%s\" may contain a"
 918                        " numerical range value.\n", IFMARKINT, OFMARKINT);
 919                 return -1;
 920         }
 921
 922         if (IS_PSTATE_PROPOSER(param))
 923                 return 0;
 924
 925         tilde_ptr = strchr(value, '~');
 926         if (!tilde_ptr) {
 927                 pr_err("Unable to locate numerical range indicator"
 928                         " \"~\" for \"%s\".\n", param->name);
 929                 return -1;
 930         }
 931         *tilde_ptr = '\0';
 932
 933         left_val_ptr = value;
 934         right_val_ptr = value + strlen(left_val_ptr) + 1;
 935
 936         if (iscsi_check_numerical_value(param, left_val_ptr) < 0)
 937                 return -1;
 938         if (iscsi_check_numerical_value(param, right_val_ptr) < 0)
 939                 return -1;
 940
 941         left_val = simple_strtoul(left_val_ptr, NULL, 0);
 942         right_val = simple_strtoul(right_val_ptr, NULL, 0);
 943         *tilde_ptr = '~';
 944
 945         if (right_val < left_val) {
 946                 pr_err("Numerical range for parameter \"%s\" contains"
 947                         " a right value which is less than the left.\n",
 948                                 param->name);
 949                 return -1;
 950         }
 951
 952         /*
 953          * For now,  enforce reasonable defaults for [I,O]FMarkInt.
 954          */
 955         tilde_ptr = strchr(param->value, '~');
 956         if (!tilde_ptr) {
 957                 pr_err("Unable to locate numerical range indicator"
 958                         " \"~\" for \"%s\".\n", param->name);
 959                 return -1;
 960         }
 961         *tilde_ptr = '\0';
 962
 963         left_val_ptr = param->value;
 964         right_val_ptr = param->value + strlen(left_val_ptr) + 1;
 965
 966         local_left_val = simple_strtoul(left_val_ptr, NULL, 0);
 967         *tilde_ptr = '~';
 968
 969         if (param->set_param) {
 970                 if ((left_val < local_left_val) ||
 971                     (right_val < local_left_val)) {
 972                         pr_err("Passed value range \"%u~%u\" is below"
 973                                 " minimum left value \"%u\" for key \"%s\","
 974                                 " rejecting.\n", left_val, right_val,
 975                                 local_left_val, param->name);
 976                         return -1;
 977                 }
 978         } else {
 979                 if ((left_val < local_left_val) &&
 980                     (right_val < local_left_val)) {
 981                         pr_err("Received value range \"%u~%u\" is"
 982                                 " below minimum left value \"%u\" for key"
 983                                 " \"%s\", rejecting.\n", left_val, right_val,
 984                                 local_left_val, param->name);
 985                         SET_PSTATE_REJECT(param);
 986                         if (iscsi_update_param_value(param, REJECT) < 0)
 987                                 return -1;
 988                 }
 989         }
 990
 991         return 0;
 992 }
 993
 994 static int iscsi_check_string_or_list_value(struct iscsi_param *param, char *value)
 995 {
 996         if (IS_PSTATE_PROPOSER(param))
 997                 return 0;
 998
 999         if (IS_TYPERANGE_AUTH_PARAM(param)) {
1000                 if (strcmp(value, KRB5) && strcmp(value, SPKM1) &&
1001                     strcmp(value, SPKM2) && strcmp(value, SRP) &&
1002                     strcmp(value, CHAP) && strcmp(value, NONE)) {
1003                         pr_err("Illegal value for \"%s\", must be"
1004                                 " \"%s\", \"%s\", \"%s\", \"%s\", \"%s\""
1005                                 " or \"%s\".\n", param->name, KRB5,
1006                                         SPKM1, SPKM2, SRP, CHAP, NONE);
1007                         return -1;
1008                 }
1009         }
1010         if (IS_TYPERANGE_DIGEST_PARAM(param)) {
1011                 if (strcmp(value, CRC32C) && strcmp(value, NONE)) {
1012                         pr_err("Illegal value for \"%s\", must be"
1013                                 " \"%s\" or \"%s\".\n", param->name,
1014                                         CRC32C, NONE);
1015                         return -1;
1016                 }
1017         }
1018         if (IS_TYPERANGE_SESSIONTYPE(param)) {
1019                 if (strcmp(value, DISCOVERY) && strcmp(value, NORMAL)) {
1020                         pr_err("Illegal value for \"%s\", must be"
1021                                 " \"%s\" or \"%s\".\n", param->name,
1022                                         DISCOVERY, NORMAL);
1023                         return -1;
1024                 }
1025         }
1026
1027         return 0;
1028 }
1029
1030 /*
1031  *      This function is used to pick a value range number,  currently just
1032  *      returns the lesser of both right values.
1033  */
1034 static char *iscsi_get_value_from_number_range(
1035         struct iscsi_param *param,
1036         char *value)
1037 {
1038         char *end_ptr, *tilde_ptr1 = NULL, *tilde_ptr2 = NULL;
1039         u32 acceptor_right_value, proposer_right_value;
1040
1041         tilde_ptr1 = strchr(value, '~');
1042         if (!tilde_ptr1)
1043                 return NULL;
1044         *tilde_ptr1++ = '\0';
1045         proposer_right_value = simple_strtoul(tilde_ptr1, &end_ptr, 0);
1046
1047         tilde_ptr2 = strchr(param->value, '~');
1048         if (!tilde_ptr2)
1049                 return NULL;
1050         *tilde_ptr2++ = '\0';
1051         acceptor_right_value = simple_strtoul(tilde_ptr2, &end_ptr, 0);
1052
1053         return (acceptor_right_value >= proposer_right_value) ?
1054                 tilde_ptr1 : tilde_ptr2;
1055 }
1056
1057 static char *iscsi_check_valuelist_for_support(
1058         struct iscsi_param *param,
1059         char *value)
1060 {
1061         char *tmp1 = NULL, *tmp2 = NULL;
1062         char *acceptor_values = NULL, *proposer_values = NULL;
1063
1064         acceptor_values = param->value;
1065         proposer_values = value;
1066
1067         do {
1068                 if (!proposer_values)
1069                         return NULL;
1070                 tmp1 = strchr(proposer_values, ',');
1071                 if (tmp1)
1072                         *tmp1 = '\0';
1073                 acceptor_values = param->value;
1074                 do {
1075                         if (!acceptor_values) {
1076                                 if (tmp1)
1077                                         *tmp1 = ',';
1078                                 return NULL;
1079                         }
1080                         tmp2 = strchr(acceptor_values, ',');
1081                         if (tmp2)
1082                                 *tmp2 = '\0';
1083                         if (!strcmp(acceptor_values, proposer_values)) {
1084                                 if (tmp2)
1085                                         *tmp2 = ',';
1086                                 goto out;
1087                         }
1088                         if (tmp2)
1089                                 *tmp2++ = ',';
1090
1091                         acceptor_values = tmp2;
1092                 } while (acceptor_values);
1093                 if (tmp1)
1094                         *tmp1++ = ',';
1095                 proposer_values = tmp1;
1096         } while (proposer_values);
1097
1098 out:
1099         return proposer_values;
1100 }
1101
1102 static int iscsi_check_acceptor_state(struct iscsi_param *param, char *value,
1103                                 struct iscsi_conn *conn)
1104 {
1105         u8 acceptor_boolean_value = 0, proposer_boolean_value = 0;
1106         char *negoitated_value = NULL;
1107
1108         if (IS_PSTATE_ACCEPTOR(param)) {
1109                 pr_err("Received key \"%s\" twice, protocol error.\n",
1110                                 param->name);
1111                 return -1;
1112         }
1113
1114         if (IS_PSTATE_REJECT(param))
1115                 return 0;
1116
1117         if (IS_TYPE_BOOL_AND(param)) {
1118                 if (!strcmp(value, YES))
1119                         proposer_boolean_value = 1;
1120                 if (!strcmp(param->value, YES))
1121                         acceptor_boolean_value = 1;
1122                 if (acceptor_boolean_value && proposer_boolean_value)
1123                         do {} while (0);
1124                 else {
1125                         if (iscsi_update_param_value(param, NO) < 0)
1126                                 return -1;
1127                         if (!proposer_boolean_value)
1128                                 SET_PSTATE_REPLY_OPTIONAL(param);
1129                 }
1130         } else if (IS_TYPE_BOOL_OR(param)) {
1131                 if (!strcmp(value, YES))
1132                         proposer_boolean_value = 1;
1133                 if (!strcmp(param->value, YES))
1134                         acceptor_boolean_value = 1;
1135                 if (acceptor_boolean_value || proposer_boolean_value) {
1136                         if (iscsi_update_param_value(param, YES) < 0)
1137                                 return -1;
1138                         if (proposer_boolean_value)
1139                                 SET_PSTATE_REPLY_OPTIONAL(param);
1140                 }
1141         } else if (IS_TYPE_NUMBER(param)) {
1142                 char *tmpptr, buf[11];
1143                 u32 acceptor_value = simple_strtoul(param->value, &tmpptr, 0);
1144                 u32 proposer_value = simple_strtoul(value, &tmpptr, 0);
1145
1146                 memset(buf, 0, sizeof(buf));
1147
1148                 if (!strcmp(param->name, MAXCONNECTIONS) ||
1149                     !strcmp(param->name, MAXBURSTLENGTH) ||
1150                     !strcmp(param->name, FIRSTBURSTLENGTH) ||
1151                     !strcmp(param->name, MAXOUTSTANDINGR2T) ||
1152                     !strcmp(param->name, DEFAULTTIME2RETAIN) ||
1153                     !strcmp(param->name, ERRORRECOVERYLEVEL)) {
1154                         if (proposer_value > acceptor_value) {
1155                                 sprintf(buf, "%u", acceptor_value);
1156                                 if (iscsi_update_param_value(param,
1157                                                 &buf[0]) < 0)
1158                                         return -1;
1159                         } else {
1160                                 if (iscsi_update_param_value(param, value) < 0)
1161                                         return -1;
1162                         }
1163                 } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) {
1164                         if (acceptor_value > proposer_value) {
1165                                 sprintf(buf, "%u", acceptor_value);
1166                                 if (iscsi_update_param_value(param,
1167                                                 &buf[0]) < 0)
1168                                         return -1;
1169                         } else {
1170                                 if (iscsi_update_param_value(param, value) < 0)
1171                                         return -1;
1172                         }
1173                 } else {
1174                         if (iscsi_update_param_value(param, value) < 0)
1175                                 return -1;
1176                 }
1177
1178                 if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) {
1179                         struct iscsi_param *param_mxdsl;
1180                         unsigned long long tmp;
1181                         int rc;
1182
1183                         rc = kstrtoull(param->value, 0, &tmp);
1184                         if (rc < 0)
1185                                 return -1;
1186
1187                         conn->conn_ops->MaxRecvDataSegmentLength = tmp;
1188                         pr_debug("Saving op->MaxRecvDataSegmentLength from"
1189                                 " original initiator received value: %u\n",
1190                                 conn->conn_ops->MaxRecvDataSegmentLength);
1191
1192                         param_mxdsl = iscsi_find_param_from_key(
1193                                                 MAXXMITDATASEGMENTLENGTH,
1194                                                 conn->param_list);
1195                         if (!param_mxdsl)
1196                                 return -1;
1197
1198                         rc = iscsi_update_param_value(param,
1199                                                 param_mxdsl->value);
1200                         if (rc < 0)
1201                                 return -1;
1202
1203                         pr_debug("Updated %s to target MXDSL value: %s\n",
1204                                         param->name, param->value);
1205                 }
1206
1207         } else if (IS_TYPE_NUMBER_RANGE(param)) {
1208                 negoitated_value = iscsi_get_value_from_number_range(
1209                                         param, value);
1210                 if (!negoitated_value)
1211                         return -1;
1212                 if (iscsi_update_param_value(param, negoitated_value) < 0)
1213                         return -1;
1214         } else if (IS_TYPE_VALUE_LIST(param)) {
1215                 negoitated_value = iscsi_check_valuelist_for_support(
1216                                         param, value);
1217                 if (!negoitated_value) {
1218                         pr_err("Proposer's value list \"%s\" contains"
1219                                 " no valid values from Acceptor's value list"
1220                                 " \"%s\".\n", value, param->value);
1221                         return -1;
1222                 }
1223                 if (iscsi_update_param_value(param, negoitated_value) < 0)
1224                         return -1;
1225         } else if (IS_PHASE_DECLARATIVE(param)) {
1226                 if (iscsi_update_param_value(param, value) < 0)
1227                         return -1;
1228                 SET_PSTATE_REPLY_OPTIONAL(param);
1229         }
1230
1231         return 0;
1232 }
1233
1234 static int iscsi_check_proposer_state(struct iscsi_param *param, char *value)
1235 {
1236         if (IS_PSTATE_RESPONSE_GOT(param)) {
1237                 pr_err("Received key \"%s\" twice, protocol error.\n",
1238                                 param->name);
1239                 return -1;
1240         }
1241
1242         if (IS_TYPE_NUMBER_RANGE(param)) {
1243                 u32 left_val = 0, right_val = 0, recieved_value = 0;
1244                 char *left_val_ptr = NULL, *right_val_ptr = NULL;
1245                 char *tilde_ptr = NULL;
1246
1247                 if (!strcmp(value, IRRELEVANT) || !strcmp(value, REJECT)) {
1248                         if (iscsi_update_param_value(param, value) < 0)
1249                                 return -1;
1250                         return 0;
1251                 }
1252
1253                 tilde_ptr = strchr(value, '~');
1254                 if (tilde_ptr) {
1255                         pr_err("Illegal \"~\" in response for \"%s\".\n",
1256                                         param->name);
1257                         return -1;
1258                 }
1259                 tilde_ptr = strchr(param->value, '~');
1260                 if (!tilde_ptr) {
1261                         pr_err("Unable to locate numerical range"
1262                                 " indicator \"~\" for \"%s\".\n", param->name);
1263                         return -1;
1264                 }
1265                 *tilde_ptr = '\0';
1266
1267                 left_val_ptr = param->value;
1268                 right_val_ptr = param->value + strlen(left_val_ptr) + 1;
1269                 left_val = simple_strtoul(left_val_ptr, NULL, 0);
1270                 right_val = simple_strtoul(right_val_ptr, NULL, 0);
1271                 recieved_value = simple_strtoul(value, NULL, 0);
1272
1273                 *tilde_ptr = '~';
1274
1275                 if ((recieved_value < left_val) ||
1276                     (recieved_value > right_val)) {
1277                         pr_err("Illegal response \"%s=%u\", value must"
1278                                 " be between %u and %u.\n", param->name,
1279                                 recieved_value, left_val, right_val);
1280                         return -1;
1281                 }
1282         } else if (IS_TYPE_VALUE_LIST(param)) {
1283                 char *comma_ptr = NULL, *tmp_ptr = NULL;
1284
1285                 comma_ptr = strchr(value, ',');
1286                 if (comma_ptr) {
1287                         pr_err("Illegal \",\" in response for \"%s\".\n",
1288                                         param->name);
1289                         return -1;
1290                 }
1291
1292                 tmp_ptr = iscsi_check_valuelist_for_support(param, value);
1293                 if (!tmp_ptr)
1294                         return -1;
1295         }
1296
1297         if (iscsi_update_param_value(param, value) < 0)
1298                 return -1;
1299
1300         return 0;
1301 }
1302
1303 static int iscsi_check_value(struct iscsi_param *param, char *value)
1304 {
1305         char *comma_ptr = NULL;
1306
1307         if (!strcmp(value, REJECT)) {
1308                 if (!strcmp(param->name, IFMARKINT) ||
1309                     !strcmp(param->name, OFMARKINT)) {
1310                         /*
1311                          * Reject is not fatal for [I,O]FMarkInt,  and causes
1312                          * [I,O]FMarker to be reset to No. (See iSCSI v20 A.3.2)
1313                          */
1314                         SET_PSTATE_REJECT(param);
1315                         return 0;
1316                 }
1317                 pr_err("Received %s=%s\n", param->name, value);
1318                 return -1;
1319         }
1320         if (!strcmp(value, IRRELEVANT)) {
1321                 pr_debug("Received %s=%s\n", param->name, value);
1322                 SET_PSTATE_IRRELEVANT(param);
1323                 return 0;
1324         }
1325         if (!strcmp(value, NOTUNDERSTOOD)) {
1326                 if (!IS_PSTATE_PROPOSER(param)) {
1327                         pr_err("Received illegal offer %s=%s\n",
1328                                 param->name, value);
1329                         return -1;
1330                 }
1331
1332 /* #warning FIXME: Add check for X-ExtensionKey here */
1333                 pr_err("Standard iSCSI key \"%s\" cannot be answered"
1334                         " with \"%s\", protocol error.\n", param->name, value);
1335                 return -1;
1336         }
1337
1338         do {
1339                 comma_ptr = NULL;
1340                 comma_ptr = strchr(value, ',');
1341
1342                 if (comma_ptr && !IS_TYPE_VALUE_LIST(param)) {
1343                         pr_err("Detected value separator \",\", but"
1344                                 " key \"%s\" does not allow a value list,"
1345                                 " protocol error.\n", param->name);
1346                         return -1;
1347                 }
1348                 if (comma_ptr)
1349                         *comma_ptr = '\0';
1350
1351                 if (strlen(value) > VALUE_MAXLEN) {
1352                         pr_err("Value for key \"%s\" exceeds %d,"
1353                                 " protocol error.\n", param->name,
1354                                 VALUE_MAXLEN);
1355                         return -1;
1356                 }
1357
1358                 if (IS_TYPE_BOOL_AND(param) || IS_TYPE_BOOL_OR(param)) {
1359                         if (iscsi_check_boolean_value(param, value) < 0)
1360                                 return -1;
1361                 } else if (IS_TYPE_NUMBER(param)) {
1362                         if (iscsi_check_numerical_value(param, value) < 0)
1363                                 return -1;
1364                 } else if (IS_TYPE_NUMBER_RANGE(param)) {
1365                         if (iscsi_check_numerical_range_value(param, value) < 0)
1366                                 return -1;
1367                 } else if (IS_TYPE_STRING(param) || IS_TYPE_VALUE_LIST(param)) {
1368                         if (iscsi_check_string_or_list_value(param, value) < 0)
1369                                 return -1;
1370                 } else {
1371                         pr_err("Huh? 0x%02x\n", param->type);
1372                         return -1;
1373                 }
1374
1375                 if (comma_ptr)
1376                         *comma_ptr++ = ',';
1377
1378                 value = comma_ptr;
1379         } while (value);
1380
1381         return 0;
1382 }
1383
1384 static struct iscsi_param *__iscsi_check_key(
1385         char *key,
1386         int sender,
1387         struct iscsi_param_list *param_list)
1388 {
1389         struct iscsi_param *param;
1390
1391         if (strlen(key) > KEY_MAXLEN) {
1392                 pr_err("Length of key name \"%s\" exceeds %d.\n",
1393                         key, KEY_MAXLEN);
1394                 return NULL;
1395         }
1396
1397         param = iscsi_find_param_from_key(key, param_list);
1398         if (!param)
1399                 return NULL;
1400
1401         if ((sender & SENDER_INITIATOR) && !IS_SENDER_INITIATOR(param)) {
1402                 pr_err("Key \"%s\" may not be sent to %s,"
1403                         " protocol error.\n", param->name,
1404                         (sender & SENDER_RECEIVER) ? "target" : "initiator");
1405                 return NULL;
1406         }
1407
1408         if ((sender & SENDER_TARGET) && !IS_SENDER_TARGET(param)) {
1409                 pr_err("Key \"%s\" may not be sent to %s,"
1410                         " protocol error.\n", param->name,
1411                         (sender & SENDER_RECEIVER) ? "initiator" : "target");
1412                 return NULL;
1413         }
1414
1415         return param;
1416 }
1417
1418 static struct iscsi_param *iscsi_check_key(
1419         char *key,
1420         int phase,
1421         int sender,
1422         struct iscsi_param_list *param_list)
1423 {
1424         struct iscsi_param *param;
1425         /*
1426          * Key name length must not exceed 63 bytes. (See iSCSI v20 5.1)
1427          */
1428         if (strlen(key) > KEY_MAXLEN) {
1429                 pr_err("Length of key name \"%s\" exceeds %d.\n",
1430                         key, KEY_MAXLEN);
1431                 return NULL;
1432         }
1433
1434         param = iscsi_find_param_from_key(key, param_list);
1435         if (!param)
1436                 return NULL;
1437
1438         if ((sender & SENDER_INITIATOR) && !IS_SENDER_INITIATOR(param)) {
1439                 pr_err("Key \"%s\" may not be sent to %s,"
1440                         " protocol error.\n", param->name,
1441                         (sender & SENDER_RECEIVER) ? "target" : "initiator");
1442                 return NULL;
1443         }
1444         if ((sender & SENDER_TARGET) && !IS_SENDER_TARGET(param)) {
1445                 pr_err("Key \"%s\" may not be sent to %s,"
1446                                 " protocol error.\n", param->name,
1447                         (sender & SENDER_RECEIVER) ? "initiator" : "target");
1448                 return NULL;
1449         }
1450
1451         if (IS_PSTATE_ACCEPTOR(param)) {
1452                 pr_err("Key \"%s\" received twice, protocol error.\n",
1453                                 key);
1454                 return NULL;
1455         }
1456
1457         if (!phase)
1458                 return param;
1459
1460         if (!(param->phase & phase)) {
1461                 pr_err("Key \"%s\" may not be negotiated during ",
1462                                 param->name);
1463                 switch (phase) {
1464                 case PHASE_SECURITY:
1465                         pr_debug("Security phase.\n");
1466                         break;
1467                 case PHASE_OPERATIONAL:
1468                         pr_debug("Operational phase.\n");
1469                         break;
1470                 default:
1471                         pr_debug("Unknown phase.\n");
1472                 }
1473                 return NULL;
1474         }
1475
1476         return param;
1477 }
1478
1479 static int iscsi_enforce_integrity_rules(
1480         u8 phase,
1481         struct iscsi_param_list *param_list)
1482 {
1483         char *tmpptr;
1484         u8 DataSequenceInOrder = 0;
1485         u8 ErrorRecoveryLevel = 0, SessionType = 0;
1486         u8 IFMarker = 0, OFMarker = 0;
1487         u8 IFMarkInt_Reject = 1, OFMarkInt_Reject = 1;
1488         u32 FirstBurstLength = 0, MaxBurstLength = 0;
1489         struct iscsi_param *param = NULL;
1490
1491         list_for_each_entry(param, &param_list->param_list, p_list) {
1492                 if (!(param->phase & phase))
1493                         continue;
1494                 if (!strcmp(param->name, SESSIONTYPE))
1495                         if (!strcmp(param->value, NORMAL))
1496                                 SessionType = 1;
1497                 if (!strcmp(param->name, ERRORRECOVERYLEVEL))
1498                         ErrorRecoveryLevel = simple_strtoul(param->value,
1499                                         &tmpptr, 0);
1500                 if (!strcmp(param->name, DATASEQUENCEINORDER))
1501                         if (!strcmp(param->value, YES))
1502                                 DataSequenceInOrder = 1;
1503                 if (!strcmp(param->name, MAXBURSTLENGTH))
1504                         MaxBurstLength = simple_strtoul(param->value,
1505                                         &tmpptr, 0);
1506                 if (!strcmp(param->name, IFMARKER))
1507                         if (!strcmp(param->value, YES))
1508                                 IFMarker = 1;
1509                 if (!strcmp(param->name, OFMARKER))
1510                         if (!strcmp(param->value, YES))
1511                                 OFMarker = 1;
1512                 if (!strcmp(param->name, IFMARKINT))
1513                         if (!strcmp(param->value, REJECT))
1514                                 IFMarkInt_Reject = 1;
1515                 if (!strcmp(param->name, OFMARKINT))
1516                         if (!strcmp(param->value, REJECT))
1517                                 OFMarkInt_Reject = 1;
1518         }
1519
1520         list_for_each_entry(param, &param_list->param_list, p_list) {
1521                 if (!(param->phase & phase))
1522                         continue;
1523                 if (!SessionType && (!IS_PSTATE_ACCEPTOR(param) &&
1524                      (strcmp(param->name, IFMARKER) &&
1525                       strcmp(param->name, OFMARKER) &&
1526                       strcmp(param->name, IFMARKINT) &&
1527                       strcmp(param->name, OFMARKINT))))
1528                         continue;
1529                 if (!strcmp(param->name, MAXOUTSTANDINGR2T) &&
1530                     DataSequenceInOrder && (ErrorRecoveryLevel > 0)) {
1531                         if (strcmp(param->value, "1")) {
1532                                 if (iscsi_update_param_value(param, "1") < 0)
1533                                         return -1;
1534                                 pr_debug("Reset \"%s\" to \"%s\".\n",
1535                                         param->name, param->value);
1536                         }
1537                 }
1538                 if (!strcmp(param->name, MAXCONNECTIONS) && !SessionType) {
1539                         if (strcmp(param->value, "1")) {
1540                                 if (iscsi_update_param_value(param, "1") < 0)
1541                                         return -1;
1542                                 pr_debug("Reset \"%s\" to \"%s\".\n",
1543                                         param->name, param->value);
1544                         }
1545                 }
1546                 if (!strcmp(param->name, FIRSTBURSTLENGTH)) {
1547                         FirstBurstLength = simple_strtoul(param->value,
1548                                         &tmpptr, 0);
1549                         if (FirstBurstLength > MaxBurstLength) {
1550                                 char tmpbuf[11];
1551                                 memset(tmpbuf, 0, sizeof(tmpbuf));
1552                                 sprintf(tmpbuf, "%u", MaxBurstLength);
1553                                 if (iscsi_update_param_value(param, tmpbuf))
1554                                         return -1;
1555                                 pr_debug("Reset \"%s\" to \"%s\".\n",
1556                                         param->name, param->value);
1557                         }
1558                 }
1559                 if (!strcmp(param->name, IFMARKER) && IFMarkInt_Reject) {
1560                         if (iscsi_update_param_value(param, NO) < 0)
1561                                 return -1;
1562                         IFMarker = 0;
1563                         pr_debug("Reset \"%s\" to \"%s\".\n",
1564                                         param->name, param->value);
1565                 }
1566                 if (!strcmp(param->name, OFMARKER) && OFMarkInt_Reject) {
1567                         if (iscsi_update_param_value(param, NO) < 0)
1568                                 return -1;
1569                         OFMarker = 0;
1570                         pr_debug("Reset \"%s\" to \"%s\".\n",
1571                                          param->name, param->value);
1572                 }
1573                 if (!strcmp(param->name, IFMARKINT) && !IFMarker) {
1574                         if (!strcmp(param->value, REJECT))
1575                                 continue;
1576                         param->state &= ~PSTATE_NEGOTIATE;
1577                         if (iscsi_update_param_value(param, IRRELEVANT) < 0)
1578                                 return -1;
1579                         pr_debug("Reset \"%s\" to \"%s\".\n",
1580                                         param->name, param->value);
1581                 }
1582                 if (!strcmp(param->name, OFMARKINT) && !OFMarker) {
1583                         if (!strcmp(param->value, REJECT))
1584                                 continue;
1585                         param->state &= ~PSTATE_NEGOTIATE;
1586                         if (iscsi_update_param_value(param, IRRELEVANT) < 0)
1587                                 return -1;
1588                         pr_debug("Reset \"%s\" to \"%s\".\n",
1589                                         param->name, param->value);
1590                 }
1591         }
1592
1593         return 0;
1594 }
1595
1596 int iscsi_decode_text_input(
1597         u8 phase,
1598         u8 sender,
1599         char *textbuf,
1600         u32 length,
1601         struct iscsi_conn *conn)
1602 {
1603         struct iscsi_param_list *param_list = conn->param_list;
1604         char *tmpbuf, *start = NULL, *end = NULL;
1605
1606         tmpbuf = kzalloc(length + 1, GFP_KERNEL);
1607         if (!tmpbuf) {
1608                 pr_err("Unable to allocate %u + 1 bytes for tmpbuf.\n", length);
1609                 return -1;
1610         }
1611
1612         memcpy(tmpbuf, textbuf, length);
1613         tmpbuf[length] = '\0';
1614         start = tmpbuf;
1615         end = (start + length);
1616
1617         while (start < end) {
1618                 char *key, *value;
1619                 struct iscsi_param *param;
1620
1621                 if (iscsi_extract_key_value(start, &key, &value) < 0) {
1622                         kfree(tmpbuf);
1623                         return -1;
1624                 }
1625
1626                 pr_debug("Got key: %s=%s\n", key, value);
1627
1628                 if (phase & PHASE_SECURITY) {
1629                         if (iscsi_check_for_auth_key(key) > 0) {
1630                                 kfree(tmpbuf);
1631                                 return 1;
1632                         }
1633                 }
1634
1635                 param = iscsi_check_key(key, phase, sender, param_list);
1636                 if (!param) {
1637                         if (iscsi_add_notunderstood_response(key,
1638                                         value, param_list) < 0) {
1639                                 kfree(tmpbuf);
1640                                 return -1;
1641                         }
1642                         start += strlen(key) + strlen(value) + 2;
1643                         continue;
1644                 }
1645                 if (iscsi_check_value(param, value) < 0) {
1646                         kfree(tmpbuf);
1647                         return -1;
1648                 }
1649
1650                 start += strlen(key) + strlen(value) + 2;
1651
1652                 if (IS_PSTATE_PROPOSER(param)) {
1653                         if (iscsi_check_proposer_state(param, value) < 0) {
1654                                 kfree(tmpbuf);
1655                                 return -1;
1656                         }
1657                         SET_PSTATE_RESPONSE_GOT(param);
1658                 } else {
1659                         if (iscsi_check_acceptor_state(param, value, conn) < 0) {
1660                                 kfree(tmpbuf);
1661                                 return -1;
1662                         }
1663                         SET_PSTATE_ACCEPTOR(param);
1664                 }
1665         }
1666
1667         kfree(tmpbuf);
1668         return 0;
1669 }
1670
1671 int iscsi_encode_text_output(
1672         u8 phase,
1673         u8 sender,
1674         char *textbuf,
1675         u32 *length,
1676         struct iscsi_param_list *param_list)
1677 {
1678         char *output_buf = NULL;
1679         struct iscsi_extra_response *er;
1680         struct iscsi_param *param;
1681
1682         output_buf = textbuf + *length;
1683
1684         if (iscsi_enforce_integrity_rules(phase, param_list) < 0)
1685                 return -1;
1686
1687         list_for_each_entry(param, &param_list->param_list, p_list) {
1688                 if (!(param->sender & sender))
1689                         continue;
1690                 if (IS_PSTATE_ACCEPTOR(param) &&
1691                     !IS_PSTATE_RESPONSE_SENT(param) &&
1692                     !IS_PSTATE_REPLY_OPTIONAL(param) &&
1693                     (param->phase & phase)) {
1694                         *length += sprintf(output_buf, "%s=%s",
1695                                 param->name, param->value);
1696                         *length += 1;
1697                         output_buf = textbuf + *length;
1698                         SET_PSTATE_RESPONSE_SENT(param);
1699                         pr_debug("Sending key: %s=%s\n",
1700                                 param->name, param->value);
1701                         continue;
1702                 }
1703                 if (IS_PSTATE_NEGOTIATE(param) &&
1704                     !IS_PSTATE_ACCEPTOR(param) &&
1705                     !IS_PSTATE_PROPOSER(param) &&
1706                     (param->phase & phase)) {
1707                         *length += sprintf(output_buf, "%s=%s",
1708                                 param->name, param->value);
1709                         *length += 1;
1710                         output_buf = textbuf + *length;
1711                         SET_PSTATE_PROPOSER(param);
1712                         iscsi_check_proposer_for_optional_reply(param);
1713                         pr_debug("Sending key: %s=%s\n",
1714                                 param->name, param->value);
1715                 }
1716         }
1717
1718         list_for_each_entry(er, &param_list->extra_response_list, er_list) {
1719                 *length += sprintf(output_buf, "%s=%s", er->key, er->value);
1720                 *length += 1;
1721                 output_buf = textbuf + *length;
1722                 pr_debug("Sending key: %s=%s\n", er->key, er->value);
1723         }
1724         iscsi_release_extra_responses(param_list);
1725
1726         return 0;
1727 }
1728
1729 int iscsi_check_negotiated_keys(struct iscsi_param_list *param_list)
1730 {
1731         int ret = 0;
1732         struct iscsi_param *param;
1733
1734         list_for_each_entry(param, &param_list->param_list, p_list) {
1735                 if (IS_PSTATE_NEGOTIATE(param) &&
1736                     IS_PSTATE_PROPOSER(param) &&
1737                     !IS_PSTATE_RESPONSE_GOT(param) &&
1738                     !IS_PSTATE_REPLY_OPTIONAL(param) &&
1739                     !IS_PHASE_DECLARATIVE(param)) {
1740                         pr_err("No response for proposed key \"%s\".\n",
1741                                         param->name);
1742                         ret = -1;
1743                 }
1744         }
1745
1746         return ret;
1747 }
1748
1749 int iscsi_change_param_value(
1750         char *keyvalue,
1751         struct iscsi_param_list *param_list,
1752         int check_key)
1753 {
1754         char *key = NULL, *value = NULL;
1755         struct iscsi_param *param;
1756         int sender = 0;
1757
1758         if (iscsi_extract_key_value(keyvalue, &key, &value) < 0)
1759                 return -1;
1760
1761         if (!check_key) {
1762                 param = __iscsi_check_key(keyvalue, sender, param_list);
1763                 if (!param)
1764                         return -1;
1765         } else {
1766                 param = iscsi_check_key(keyvalue, 0, sender, param_list);
1767                 if (!param)
1768                         return -1;
1769
1770                 param->set_param = 1;
1771                 if (iscsi_check_value(param, value) < 0) {
1772                         param->set_param = 0;
1773                         return -1;
1774                 }
1775                 param->set_param = 0;
1776         }
1777
1778         if (iscsi_update_param_value(param, value) < 0)
1779                 return -1;
1780
1781         return 0;
1782 }
1783
1784 void iscsi_set_connection_parameters(
1785         struct iscsi_conn_ops *ops,
1786         struct iscsi_param_list *param_list)
1787 {
1788         char *tmpptr;
1789         struct iscsi_param *param;
1790
1791         pr_debug("---------------------------------------------------"
1792                         "---------------\n");
1793         list_for_each_entry(param, &param_list->param_list, p_list) {
1794                 /*
1795                  * Special case to set MAXXMITDATASEGMENTLENGTH from the
1796                  * target requested MaxRecvDataSegmentLength, even though
1797                  * this key is not sent over the wire.
1798                  */
1799                 if (!strcmp(param->name, MAXXMITDATASEGMENTLENGTH)) {
1800                         ops->MaxXmitDataSegmentLength =
1801                                 simple_strtoul(param->value, &tmpptr, 0);
1802                         pr_debug("MaxXmitDataSegmentLength:     %s\n",
1803                                 param->value);
1804                 }
1805
1806                 if (!IS_PSTATE_ACCEPTOR(param) && !IS_PSTATE_PROPOSER(param))
1807                         continue;
1808                 if (!strcmp(param->name, AUTHMETHOD)) {
1809                         pr_debug("AuthMethod:                   %s\n",
1810                                 param->value);
1811                 } else if (!strcmp(param->name, HEADERDIGEST)) {
1812                         ops->HeaderDigest = !strcmp(param->value, CRC32C);
1813                         pr_debug("HeaderDigest:                 %s\n",
1814                                 param->value);
1815                 } else if (!strcmp(param->name, DATADIGEST)) {
1816                         ops->DataDigest = !strcmp(param->value, CRC32C);
1817                         pr_debug("DataDigest:                   %s\n",
1818                                 param->value);
1819                 } else if (!strcmp(param->name, MAXRECVDATASEGMENTLENGTH)) {
1820                         /*
1821                          * At this point iscsi_check_acceptor_state() will have
1822                          * set ops->MaxRecvDataSegmentLength from the original
1823                          * initiator provided value.
1824                          */
1825                         pr_debug("MaxRecvDataSegmentLength:     %u\n",
1826                                 ops->MaxRecvDataSegmentLength);
1827                 } else if (!strcmp(param->name, OFMARKER)) {
1828                         ops->OFMarker = !strcmp(param->value, YES);
1829                         pr_debug("OFMarker:                     %s\n",
1830                                 param->value);
1831                 } else if (!strcmp(param->name, IFMARKER)) {
1832                         ops->IFMarker = !strcmp(param->value, YES);
1833                         pr_debug("IFMarker:                     %s\n",
1834                                 param->value);
1835                 } else if (!strcmp(param->name, OFMARKINT)) {
1836                         ops->OFMarkInt =
1837                                 simple_strtoul(param->value, &tmpptr, 0);
1838                         pr_debug("OFMarkInt:                    %s\n",
1839                                 param->value);
1840                 } else if (!strcmp(param->name, IFMARKINT)) {
1841                         ops->IFMarkInt =
1842                                 simple_strtoul(param->value, &tmpptr, 0);
1843                         pr_debug("IFMarkInt:                    %s\n",
1844                                 param->value);
1845                 } else if (!strcmp(param->name, INITIATORRECVDATASEGMENTLENGTH)) {
1846                         ops->InitiatorRecvDataSegmentLength =
1847                                 simple_strtoul(param->value, &tmpptr, 0);
1848                         pr_debug("InitiatorRecvDataSegmentLength: %s\n",
1849                                 param->value);
1850                         ops->MaxRecvDataSegmentLength =
1851                                         ops->InitiatorRecvDataSegmentLength;
1852                         pr_debug("Set MRDSL from InitiatorRecvDataSegmentLength\n");
1853                 } else if (!strcmp(param->name, TARGETRECVDATASEGMENTLENGTH)) {
1854                         ops->TargetRecvDataSegmentLength =
1855                                 simple_strtoul(param->value, &tmpptr, 0);
1856                         pr_debug("TargetRecvDataSegmentLength:  %s\n",
1857                                 param->value);
1858                         ops->MaxXmitDataSegmentLength =
1859                                         ops->TargetRecvDataSegmentLength;
1860                         pr_debug("Set MXDSL from TargetRecvDataSegmentLength\n");
1861                 }
1862         }
1863         pr_debug("----------------------------------------------------"
1864                         "--------------\n");
1865 }
1866
1867 void iscsi_set_session_parameters(
1868         struct iscsi_sess_ops *ops,
1869         struct iscsi_param_list *param_list,
1870         int leading)
1871 {
1872         char *tmpptr;
1873         struct iscsi_param *param;
1874
1875         pr_debug("----------------------------------------------------"
1876                         "--------------\n");
1877         list_for_each_entry(param, &param_list->param_list, p_list) {
1878                 if (!IS_PSTATE_ACCEPTOR(param) && !IS_PSTATE_PROPOSER(param))
1879                         continue;
1880                 if (!strcmp(param->name, INITIATORNAME)) {
1881                         if (!param->value)
1882                                 continue;
1883                         if (leading)
1884                                 snprintf(ops->InitiatorName,
1885                                                 sizeof(ops->InitiatorName),
1886                                                 "%s", param->value);
1887                         pr_debug("InitiatorName:                %s\n",
1888                                 param->value);
1889                 } else if (!strcmp(param->name, INITIATORALIAS)) {
1890                         if (!param->value)
1891                                 continue;
1892                         snprintf(ops->InitiatorAlias,
1893                                                 sizeof(ops->InitiatorAlias),
1894                                                 "%s", param->value);
1895                         pr_debug("InitiatorAlias:               %s\n",
1896                                 param->value);
1897                 } else if (!strcmp(param->name, TARGETNAME)) {
1898                         if (!param->value)
1899                                 continue;
1900                         if (leading)
1901                                 snprintf(ops->TargetName,
1902                                                 sizeof(ops->TargetName),
1903                                                 "%s", param->value);
1904                         pr_debug("TargetName:                   %s\n",
1905                                 param->value);
1906                 } else if (!strcmp(param->name, TARGETALIAS)) {
1907                         if (!param->value)
1908                                 continue;
1909                         snprintf(ops->TargetAlias, sizeof(ops->TargetAlias),
1910                                         "%s", param->value);
1911                         pr_debug("TargetAlias:                  %s\n",
1912                                 param->value);
1913                 } else if (!strcmp(param->name, TARGETPORTALGROUPTAG)) {
1914                         ops->TargetPortalGroupTag =
1915                                 simple_strtoul(param->value, &tmpptr, 0);
1916                         pr_debug("TargetPortalGroupTag:         %s\n",
1917                                 param->value);
1918                 } else if (!strcmp(param->name, MAXCONNECTIONS)) {
1919                         ops->MaxConnections =
1920                                 simple_strtoul(param->value, &tmpptr, 0);
1921                         pr_debug("MaxConnections:               %s\n",
1922                                 param->value);
1923                 } else if (!strcmp(param->name, INITIALR2T)) {
1924                         ops->InitialR2T = !strcmp(param->value, YES);
1925                          pr_debug("InitialR2T:                   %s\n",
1926                                 param->value);
1927                 } else if (!strcmp(param->name, IMMEDIATEDATA)) {
1928                         ops->ImmediateData = !strcmp(param->value, YES);
1929                         pr_debug("ImmediateData:                %s\n",
1930                                 param->value);
1931                 } else if (!strcmp(param->name, MAXBURSTLENGTH)) {
1932                         ops->MaxBurstLength =
1933                                 simple_strtoul(param->value, &tmpptr, 0);
1934                         pr_debug("MaxBurstLength:               %s\n",
1935                                 param->value);
1936                 } else if (!strcmp(param->name, FIRSTBURSTLENGTH)) {
1937                         ops->FirstBurstLength =
1938                                 simple_strtoul(param->value, &tmpptr, 0);
1939                         pr_debug("FirstBurstLength:             %s\n",
1940                                 param->value);
1941                 } else if (!strcmp(param->name, DEFAULTTIME2WAIT)) {
1942                         ops->DefaultTime2Wait =
1943                                 simple_strtoul(param->value, &tmpptr, 0);
1944                         pr_debug("DefaultTime2Wait:             %s\n",
1945                                 param->value);
1946                 } else if (!strcmp(param->name, DEFAULTTIME2RETAIN)) {
1947                         ops->DefaultTime2Retain =
1948                                 simple_strtoul(param->value, &tmpptr, 0);
1949                         pr_debug("DefaultTime2Retain:           %s\n",
1950                                 param->value);
1951                 } else if (!strcmp(param->name, MAXOUTSTANDINGR2T)) {
1952                         ops->MaxOutstandingR2T =
1953                                 simple_strtoul(param->value, &tmpptr, 0);
1954                         pr_debug("MaxOutstandingR2T:            %s\n",
1955                                 param->value);
1956                 } else if (!strcmp(param->name, DATAPDUINORDER)) {
1957                         ops->DataPDUInOrder = !strcmp(param->value, YES);
1958                         pr_debug("DataPDUInOrder:               %s\n",
1959                                 param->value);
1960                 } else if (!strcmp(param->name, DATASEQUENCEINORDER)) {
1961                         ops->DataSequenceInOrder = !strcmp(param->value, YES);
1962                         pr_debug("DataSequenceInOrder:          %s\n",
1963                                 param->value);
1964                 } else if (!strcmp(param->name, ERRORRECOVERYLEVEL)) {
1965                         ops->ErrorRecoveryLevel =
1966                                 simple_strtoul(param->value, &tmpptr, 0);
1967                         pr_debug("ErrorRecoveryLevel:           %s\n",
1968                                 param->value);
1969                 } else if (!strcmp(param->name, SESSIONTYPE)) {
1970                         ops->SessionType = !strcmp(param->value, DISCOVERY);
1971                         pr_debug("SessionType:                  %s\n",
1972                                 param->value);
1973                 } else if (!strcmp(param->name, RDMAEXTENSIONS)) {
1974                         ops->RDMAExtensions = !strcmp(param->value, YES);
1975                         pr_debug("RDMAExtensions:               %s\n",
1976                                 param->value);
1977                 }
1978         }
1979         pr_debug("----------------------------------------------------"
1980                         "--------------\n");
1981
1982 }