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