drivers/target/iscsi/iscsi_target_tpg.c

   1 /*******************************************************************************
   2  * This file contains iSCSI Target Portal Group related functions.
   3  *
   4  * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
   5  *
   6  * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
   7  *
   8  * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  ******************************************************************************/
  20
  21 #include <target/target_core_base.h>
  22 #include <target/target_core_fabric.h>
  23 #include <target/target_core_configfs.h>
  24
  25 #include "iscsi_target_core.h"
  26 #include "iscsi_target_erl0.h"
  27 #include "iscsi_target_login.h"
  28 #include "iscsi_target_nodeattrib.h"
  29 #include "iscsi_target_tpg.h"
  30 #include "iscsi_target_util.h"
  31 #include "iscsi_target.h"
  32 #include "iscsi_target_parameters.h"
  33
  34 struct iscsi_portal_group *iscsit_alloc_portal_group(struct iscsi_tiqn *tiqn, u16 tpgt)
  35 {
  36         struct iscsi_portal_group *tpg;
  37
  38         tpg = kzalloc(sizeof(struct iscsi_portal_group), GFP_KERNEL);
  39         if (!tpg) {
  40                 pr_err("Unable to allocate struct iscsi_portal_group\n");
  41                 return NULL;
  42         }
  43
  44         tpg->tpgt = tpgt;
  45         tpg->tpg_state = TPG_STATE_FREE;
  46         tpg->tpg_tiqn = tiqn;
  47         INIT_LIST_HEAD(&tpg->tpg_gnp_list);
  48         INIT_LIST_HEAD(&tpg->tpg_list);
  49         mutex_init(&tpg->tpg_access_lock);
  50         mutex_init(&tpg->np_login_lock);
  51         spin_lock_init(&tpg->tpg_state_lock);
  52         spin_lock_init(&tpg->tpg_np_lock);
  53
  54         return tpg;
  55 }
  56
  57 static void iscsit_set_default_tpg_attribs(struct iscsi_portal_group *);
  58
  59 int iscsit_load_discovery_tpg(void)
  60 {
  61         struct iscsi_param *param;
  62         struct iscsi_portal_group *tpg;
  63         int ret;
  64
  65         tpg = iscsit_alloc_portal_group(NULL, 1);
  66         if (!tpg) {
  67                 pr_err("Unable to allocate struct iscsi_portal_group\n");
  68                 return -1;
  69         }
  70
  71         ret = core_tpg_register(
  72                         &lio_target_fabric_configfs->tf_ops,
  73                         NULL, &tpg->tpg_se_tpg, tpg,
  74                         TRANSPORT_TPG_TYPE_DISCOVERY);
  75         if (ret < 0) {
  76                 kfree(tpg);
  77                 return -1;
  78         }
  79
  80         tpg->sid = 1; /* First Assigned LIO Session ID */
  81         iscsit_set_default_tpg_attribs(tpg);
  82
  83         if (iscsi_create_default_params(&tpg->param_list) < 0)
  84                 goto out;
  85         /*
  86          * By default we disable authentication for discovery sessions,
  87          * this can be changed with:
  88          *
  89          * /sys/kernel/config/target/iscsi/discovery_auth/enforce_discovery_auth
  90          */
  91         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
  92         if (!param)
  93                 goto out;
  94
  95         if (iscsi_update_param_value(param, "CHAP,None") < 0)
  96                 goto out;
  97
  98         tpg->tpg_attrib.authentication = 0;
  99
 100         spin_lock(&tpg->tpg_state_lock);
 101         tpg->tpg_state  = TPG_STATE_ACTIVE;
 102         spin_unlock(&tpg->tpg_state_lock);
 103
 104         iscsit_global->discovery_tpg = tpg;
 105         pr_debug("CORE[0] - Allocated Discovery TPG\n");
 106
 107         return 0;
 108 out:
 109         if (tpg->sid == 1)
 110                 core_tpg_deregister(&tpg->tpg_se_tpg);
 111         kfree(tpg);
 112         return -1;
 113 }
 114
 115 void iscsit_release_discovery_tpg(void)
 116 {
 117         struct iscsi_portal_group *tpg = iscsit_global->discovery_tpg;
 118
 119         if (!tpg)
 120                 return;
 121
 122         core_tpg_deregister(&tpg->tpg_se_tpg);
 123
 124         kfree(tpg);
 125         iscsit_global->discovery_tpg = NULL;
 126 }
 127
 128 struct iscsi_portal_group *iscsit_get_tpg_from_np(
 129         struct iscsi_tiqn *tiqn,
 130         struct iscsi_np *np)
 131 {
 132         struct iscsi_portal_group *tpg = NULL;
 133         struct iscsi_tpg_np *tpg_np;
 134
 135         spin_lock(&tiqn->tiqn_tpg_lock);
 136         list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) {
 137
 138                 spin_lock(&tpg->tpg_state_lock);
 139                 if (tpg->tpg_state == TPG_STATE_FREE) {
 140                         spin_unlock(&tpg->tpg_state_lock);
 141                         continue;
 142                 }
 143                 spin_unlock(&tpg->tpg_state_lock);
 144
 145                 spin_lock(&tpg->tpg_np_lock);
 146                 list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
 147                         if (tpg_np->tpg_np == np) {
 148                                 spin_unlock(&tpg->tpg_np_lock);
 149                                 spin_unlock(&tiqn->tiqn_tpg_lock);
 150                                 return tpg;
 151                         }
 152                 }
 153                 spin_unlock(&tpg->tpg_np_lock);
 154         }
 155         spin_unlock(&tiqn->tiqn_tpg_lock);
 156
 157         return NULL;
 158 }
 159
 160 int iscsit_get_tpg(
 161         struct iscsi_portal_group *tpg)
 162 {
 163         int ret;
 164
 165         ret = mutex_lock_interruptible(&tpg->tpg_access_lock);
 166         return ((ret != 0) || signal_pending(current)) ? -1 : 0;
 167 }
 168
 169 void iscsit_put_tpg(struct iscsi_portal_group *tpg)
 170 {
 171         mutex_unlock(&tpg->tpg_access_lock);
 172 }
 173
 174 static void iscsit_clear_tpg_np_login_thread(
 175         struct iscsi_tpg_np *tpg_np,
 176         struct iscsi_portal_group *tpg)
 177 {
 178         if (!tpg_np->tpg_np) {
 179                 pr_err("struct iscsi_tpg_np->tpg_np is NULL!\n");
 180                 return;
 181         }
 182
 183         iscsit_reset_np_thread(tpg_np->tpg_np, tpg_np, tpg);
 184 }
 185
 186 void iscsit_clear_tpg_np_login_threads(
 187         struct iscsi_portal_group *tpg)
 188 {
 189         struct iscsi_tpg_np *tpg_np;
 190
 191         spin_lock(&tpg->tpg_np_lock);
 192         list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
 193                 if (!tpg_np->tpg_np) {
 194                         pr_err("struct iscsi_tpg_np->tpg_np is NULL!\n");
 195                         continue;
 196                 }
 197                 spin_unlock(&tpg->tpg_np_lock);
 198                 iscsit_clear_tpg_np_login_thread(tpg_np, tpg);
 199                 spin_lock(&tpg->tpg_np_lock);
 200         }
 201         spin_unlock(&tpg->tpg_np_lock);
 202 }
 203
 204 void iscsit_tpg_dump_params(struct iscsi_portal_group *tpg)
 205 {
 206         iscsi_print_params(tpg->param_list);
 207 }
 208
 209 static void iscsit_set_default_tpg_attribs(struct iscsi_portal_group *tpg)
 210 {
 211         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 212
 213         a->authentication = TA_AUTHENTICATION;
 214         a->login_timeout = TA_LOGIN_TIMEOUT;
 215         a->netif_timeout = TA_NETIF_TIMEOUT;
 216         a->default_cmdsn_depth = TA_DEFAULT_CMDSN_DEPTH;
 217         a->generate_node_acls = TA_GENERATE_NODE_ACLS;
 218         a->cache_dynamic_acls = TA_CACHE_DYNAMIC_ACLS;
 219         a->demo_mode_write_protect = TA_DEMO_MODE_WRITE_PROTECT;
 220         a->prod_mode_write_protect = TA_PROD_MODE_WRITE_PROTECT;
 221 }
 222
 223 int iscsit_tpg_add_portal_group(struct iscsi_tiqn *tiqn, struct iscsi_portal_group *tpg)
 224 {
 225         if (tpg->tpg_state != TPG_STATE_FREE) {
 226                 pr_err("Unable to add iSCSI Target Portal Group: %d"
 227                         " while not in TPG_STATE_FREE state.\n", tpg->tpgt);
 228                 return -EEXIST;
 229         }
 230         iscsit_set_default_tpg_attribs(tpg);
 231
 232         if (iscsi_create_default_params(&tpg->param_list) < 0)
 233                 goto err_out;
 234
 235         ISCSI_TPG_ATTRIB(tpg)->tpg = tpg;
 236
 237         spin_lock(&tpg->tpg_state_lock);
 238         tpg->tpg_state  = TPG_STATE_INACTIVE;
 239         spin_unlock(&tpg->tpg_state_lock);
 240
 241         spin_lock(&tiqn->tiqn_tpg_lock);
 242         list_add_tail(&tpg->tpg_list, &tiqn->tiqn_tpg_list);
 243         tiqn->tiqn_ntpgs++;
 244         pr_debug("CORE[%s]_TPG[%hu] - Added iSCSI Target Portal Group\n",
 245                         tiqn->tiqn, tpg->tpgt);
 246         spin_unlock(&tiqn->tiqn_tpg_lock);
 247
 248         return 0;
 249 err_out:
 250         if (tpg->param_list) {
 251                 iscsi_release_param_list(tpg->param_list);
 252                 tpg->param_list = NULL;
 253         }
 254         kfree(tpg);
 255         return -ENOMEM;
 256 }
 257
 258 int iscsit_tpg_del_portal_group(
 259         struct iscsi_tiqn *tiqn,
 260         struct iscsi_portal_group *tpg,
 261         int force)
 262 {
 263         u8 old_state = tpg->tpg_state;
 264
 265         spin_lock(&tpg->tpg_state_lock);
 266         tpg->tpg_state = TPG_STATE_INACTIVE;
 267         spin_unlock(&tpg->tpg_state_lock);
 268
 269         if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
 270                 pr_err("Unable to delete iSCSI Target Portal Group:"
 271                         " %hu while active sessions exist, and force=0\n",
 272                         tpg->tpgt);
 273                 tpg->tpg_state = old_state;
 274                 return -EPERM;
 275         }
 276
 277         core_tpg_clear_object_luns(&tpg->tpg_se_tpg);
 278
 279         if (tpg->param_list) {
 280                 iscsi_release_param_list(tpg->param_list);
 281                 tpg->param_list = NULL;
 282         }
 283
 284         core_tpg_deregister(&tpg->tpg_se_tpg);
 285
 286         spin_lock(&tpg->tpg_state_lock);
 287         tpg->tpg_state = TPG_STATE_FREE;
 288         spin_unlock(&tpg->tpg_state_lock);
 289
 290         spin_lock(&tiqn->tiqn_tpg_lock);
 291         tiqn->tiqn_ntpgs--;
 292         list_del(&tpg->tpg_list);
 293         spin_unlock(&tiqn->tiqn_tpg_lock);
 294
 295         pr_debug("CORE[%s]_TPG[%hu] - Deleted iSCSI Target Portal Group\n",
 296                         tiqn->tiqn, tpg->tpgt);
 297
 298         kfree(tpg);
 299         return 0;
 300 }
 301
 302 int iscsit_tpg_enable_portal_group(struct iscsi_portal_group *tpg)
 303 {
 304         struct iscsi_param *param;
 305         struct iscsi_tiqn *tiqn = tpg->tpg_tiqn;
 306
 307         spin_lock(&tpg->tpg_state_lock);
 308         if (tpg->tpg_state == TPG_STATE_ACTIVE) {
 309                 pr_err("iSCSI target portal group: %hu is already"
 310                         " active, ignoring request.\n", tpg->tpgt);
 311                 spin_unlock(&tpg->tpg_state_lock);
 312                 return -EINVAL;
 313         }
 314         /*
 315          * Make sure that AuthMethod does not contain None as an option
 316          * unless explictly disabled.  Set the default to CHAP if authentication
 317          * is enforced (as per default), and remove the NONE option.
 318          */
 319         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
 320         if (!param) {
 321                 spin_unlock(&tpg->tpg_state_lock);
 322                 return -ENOMEM;
 323         }
 324
 325         if (ISCSI_TPG_ATTRIB(tpg)->authentication) {
 326                 if (!strcmp(param->value, NONE))
 327                         if (iscsi_update_param_value(param, CHAP) < 0) {
 328                                 spin_unlock(&tpg->tpg_state_lock);
 329                                 return -ENOMEM;
 330                         }
 331                 if (iscsit_ta_authentication(tpg, 1) < 0) {
 332                         spin_unlock(&tpg->tpg_state_lock);
 333                         return -ENOMEM;
 334                 }
 335         }
 336
 337         tpg->tpg_state = TPG_STATE_ACTIVE;
 338         spin_unlock(&tpg->tpg_state_lock);
 339
 340         spin_lock(&tiqn->tiqn_tpg_lock);
 341         tiqn->tiqn_active_tpgs++;
 342         pr_debug("iSCSI_TPG[%hu] - Enabled iSCSI Target Portal Group\n",
 343                         tpg->tpgt);
 344         spin_unlock(&tiqn->tiqn_tpg_lock);
 345
 346         return 0;
 347 }
 348
 349 int iscsit_tpg_disable_portal_group(struct iscsi_portal_group *tpg, int force)
 350 {
 351         struct iscsi_tiqn *tiqn;
 352         u8 old_state = tpg->tpg_state;
 353
 354         spin_lock(&tpg->tpg_state_lock);
 355         if (tpg->tpg_state == TPG_STATE_INACTIVE) {
 356                 pr_err("iSCSI Target Portal Group: %hu is already"
 357                         " inactive, ignoring request.\n", tpg->tpgt);
 358                 spin_unlock(&tpg->tpg_state_lock);
 359                 return -EINVAL;
 360         }
 361         tpg->tpg_state = TPG_STATE_INACTIVE;
 362         spin_unlock(&tpg->tpg_state_lock);
 363
 364         iscsit_clear_tpg_np_login_threads(tpg);
 365
 366         if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
 367                 spin_lock(&tpg->tpg_state_lock);
 368                 tpg->tpg_state = old_state;
 369                 spin_unlock(&tpg->tpg_state_lock);
 370                 pr_err("Unable to disable iSCSI Target Portal Group:"
 371                         " %hu while active sessions exist, and force=0\n",
 372                         tpg->tpgt);
 373                 return -EPERM;
 374         }
 375
 376         tiqn = tpg->tpg_tiqn;
 377         if (!tiqn || (tpg == iscsit_global->discovery_tpg))
 378                 return 0;
 379
 380         spin_lock(&tiqn->tiqn_tpg_lock);
 381         tiqn->tiqn_active_tpgs--;
 382         pr_debug("iSCSI_TPG[%hu] - Disabled iSCSI Target Portal Group\n",
 383                         tpg->tpgt);
 384         spin_unlock(&tiqn->tiqn_tpg_lock);
 385
 386         return 0;
 387 }
 388
 389 struct iscsi_node_attrib *iscsit_tpg_get_node_attrib(
 390         struct iscsi_session *sess)
 391 {
 392         struct se_session *se_sess = sess->se_sess;
 393         struct se_node_acl *se_nacl = se_sess->se_node_acl;
 394         struct iscsi_node_acl *acl = container_of(se_nacl, struct iscsi_node_acl,
 395                                         se_node_acl);
 396
 397         return &acl->node_attrib;
 398 }
 399
 400 struct iscsi_tpg_np *iscsit_tpg_locate_child_np(
 401         struct iscsi_tpg_np *tpg_np,
 402         int network_transport)
 403 {
 404         struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
 405
 406         spin_lock(&tpg_np->tpg_np_parent_lock);
 407         list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
 408                         &tpg_np->tpg_np_parent_list, tpg_np_child_list) {
 409                 if (tpg_np_child->tpg_np->np_network_transport ==
 410                                 network_transport) {
 411                         spin_unlock(&tpg_np->tpg_np_parent_lock);
 412                         return tpg_np_child;
 413                 }
 414         }
 415         spin_unlock(&tpg_np->tpg_np_parent_lock);
 416
 417         return NULL;
 418 }
 419
 420 struct iscsi_tpg_np *iscsit_tpg_add_network_portal(
 421         struct iscsi_portal_group *tpg,
 422         struct __kernel_sockaddr_storage *sockaddr,
 423         char *ip_str,
 424         struct iscsi_tpg_np *tpg_np_parent,
 425         int network_transport)
 426 {
 427         struct iscsi_np *np;
 428         struct iscsi_tpg_np *tpg_np;
 429
 430         tpg_np = kzalloc(sizeof(struct iscsi_tpg_np), GFP_KERNEL);
 431         if (!tpg_np) {
 432                 pr_err("Unable to allocate memory for"
 433                                 " struct iscsi_tpg_np.\n");
 434                 return ERR_PTR(-ENOMEM);
 435         }
 436
 437         np = iscsit_add_np(sockaddr, ip_str, network_transport);
 438         if (IS_ERR(np)) {
 439                 kfree(tpg_np);
 440                 return ERR_CAST(np);
 441         }
 442
 443         INIT_LIST_HEAD(&tpg_np->tpg_np_list);
 444         INIT_LIST_HEAD(&tpg_np->tpg_np_child_list);
 445         INIT_LIST_HEAD(&tpg_np->tpg_np_parent_list);
 446         spin_lock_init(&tpg_np->tpg_np_parent_lock);
 447         tpg_np->tpg_np          = np;
 448         tpg_np->tpg             = tpg;
 449
 450         spin_lock(&tpg->tpg_np_lock);
 451         list_add_tail(&tpg_np->tpg_np_list, &tpg->tpg_gnp_list);
 452         tpg->num_tpg_nps++;
 453         if (tpg->tpg_tiqn)
 454                 tpg->tpg_tiqn->tiqn_num_tpg_nps++;
 455         spin_unlock(&tpg->tpg_np_lock);
 456
 457         if (tpg_np_parent) {
 458                 tpg_np->tpg_np_parent = tpg_np_parent;
 459                 spin_lock(&tpg_np_parent->tpg_np_parent_lock);
 460                 list_add_tail(&tpg_np->tpg_np_child_list,
 461                         &tpg_np_parent->tpg_np_parent_list);
 462                 spin_unlock(&tpg_np_parent->tpg_np_parent_lock);
 463         }
 464
 465         pr_debug("CORE[%s] - Added Network Portal: %s:%hu,%hu on %s\n",
 466                 tpg->tpg_tiqn->tiqn, np->np_ip, np->np_port, tpg->tpgt,
 467                 (np->np_network_transport == ISCSI_TCP) ? "TCP" : "SCTP");
 468
 469         return tpg_np;
 470 }
 471
 472 static int iscsit_tpg_release_np(
 473         struct iscsi_tpg_np *tpg_np,
 474         struct iscsi_portal_group *tpg,
 475         struct iscsi_np *np)
 476 {
 477         iscsit_clear_tpg_np_login_thread(tpg_np, tpg);
 478
 479         pr_debug("CORE[%s] - Removed Network Portal: %s:%hu,%hu on %s\n",
 480                 tpg->tpg_tiqn->tiqn, np->np_ip, np->np_port, tpg->tpgt,
 481                 (np->np_network_transport == ISCSI_TCP) ? "TCP" : "SCTP");
 482
 483         tpg_np->tpg_np = NULL;
 484         tpg_np->tpg = NULL;
 485         kfree(tpg_np);
 486         /*
 487          * iscsit_del_np() will shutdown struct iscsi_np when last TPG reference is released.
 488          */
 489         return iscsit_del_np(np);
 490 }
 491
 492 int iscsit_tpg_del_network_portal(
 493         struct iscsi_portal_group *tpg,
 494         struct iscsi_tpg_np *tpg_np)
 495 {
 496         struct iscsi_np *np;
 497         struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
 498         int ret = 0;
 499
 500         np = tpg_np->tpg_np;
 501         if (!np) {
 502                 pr_err("Unable to locate struct iscsi_np from"
 503                                 " struct iscsi_tpg_np\n");
 504                 return -EINVAL;
 505         }
 506
 507         if (!tpg_np->tpg_np_parent) {
 508                 /*
 509                  * We are the parent tpg network portal.  Release all of the
 510                  * child tpg_np's (eg: the non ISCSI_TCP ones) on our parent
 511                  * list first.
 512                  */
 513                 list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
 514                                 &tpg_np->tpg_np_parent_list,
 515                                 tpg_np_child_list) {
 516                         ret = iscsit_tpg_del_network_portal(tpg, tpg_np_child);
 517                         if (ret < 0)
 518                                 pr_err("iscsit_tpg_del_network_portal()"
 519                                         " failed: %d\n", ret);
 520                 }
 521         } else {
 522                 /*
 523                  * We are not the parent ISCSI_TCP tpg network portal.  Release
 524                  * our own network portals from the child list.
 525                  */
 526                 spin_lock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
 527                 list_del(&tpg_np->tpg_np_child_list);
 528                 spin_unlock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
 529         }
 530
 531         spin_lock(&tpg->tpg_np_lock);
 532         list_del(&tpg_np->tpg_np_list);
 533         tpg->num_tpg_nps--;
 534         if (tpg->tpg_tiqn)
 535                 tpg->tpg_tiqn->tiqn_num_tpg_nps--;
 536         spin_unlock(&tpg->tpg_np_lock);
 537
 538         return iscsit_tpg_release_np(tpg_np, tpg, np);
 539 }
 540
 541 int iscsit_tpg_set_initiator_node_queue_depth(
 542         struct iscsi_portal_group *tpg,
 543         unsigned char *initiatorname,
 544         u32 queue_depth,
 545         int force)
 546 {
 547         return core_tpg_set_initiator_node_queue_depth(&tpg->tpg_se_tpg,
 548                 initiatorname, queue_depth, force);
 549 }
 550
 551 int iscsit_ta_authentication(struct iscsi_portal_group *tpg, u32 authentication)
 552 {
 553         unsigned char buf1[256], buf2[256], *none = NULL;
 554         int len;
 555         struct iscsi_param *param;
 556         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 557
 558         if ((authentication != 1) && (authentication != 0)) {
 559                 pr_err("Illegal value for authentication parameter:"
 560                         " %u, ignoring request.\n", authentication);
 561                 return -1;
 562         }
 563
 564         memset(buf1, 0, sizeof(buf1));
 565         memset(buf2, 0, sizeof(buf2));
 566
 567         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
 568         if (!param)
 569                 return -EINVAL;
 570
 571         if (authentication) {
 572                 snprintf(buf1, sizeof(buf1), "%s", param->value);
 573                 none = strstr(buf1, NONE);
 574                 if (!none)
 575                         goto out;
 576                 if (!strncmp(none + 4, ",", 1)) {
 577                         if (!strcmp(buf1, none))
 578                                 sprintf(buf2, "%s", none+5);
 579                         else {
 580                                 none--;
 581                                 *none = '\0';
 582                                 len = sprintf(buf2, "%s", buf1);
 583                                 none += 5;
 584                                 sprintf(buf2 + len, "%s", none);
 585                         }
 586                 } else {
 587                         none--;
 588                         *none = '\0';
 589                         sprintf(buf2, "%s", buf1);
 590                 }
 591                 if (iscsi_update_param_value(param, buf2) < 0)
 592                         return -EINVAL;
 593         } else {
 594                 snprintf(buf1, sizeof(buf1), "%s", param->value);
 595                 none = strstr(buf1, NONE);
 596                 if (none)
 597                         goto out;
 598                 strncat(buf1, ",", strlen(","));
 599                 strncat(buf1, NONE, strlen(NONE));
 600                 if (iscsi_update_param_value(param, buf1) < 0)
 601                         return -EINVAL;
 602         }
 603
 604 out:
 605         a->authentication = authentication;
 606         pr_debug("%s iSCSI Authentication Methods for TPG: %hu.\n",
 607                 a->authentication ? "Enforcing" : "Disabling", tpg->tpgt);
 608
 609         return 0;
 610 }
 611
 612 int iscsit_ta_login_timeout(
 613         struct iscsi_portal_group *tpg,
 614         u32 login_timeout)
 615 {
 616         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 617
 618         if (login_timeout > TA_LOGIN_TIMEOUT_MAX) {
 619                 pr_err("Requested Login Timeout %u larger than maximum"
 620                         " %u\n", login_timeout, TA_LOGIN_TIMEOUT_MAX);
 621                 return -EINVAL;
 622         } else if (login_timeout < TA_LOGIN_TIMEOUT_MIN) {
 623                 pr_err("Requested Logout Timeout %u smaller than"
 624                         " minimum %u\n", login_timeout, TA_LOGIN_TIMEOUT_MIN);
 625                 return -EINVAL;
 626         }
 627
 628         a->login_timeout = login_timeout;
 629         pr_debug("Set Logout Timeout to %u for Target Portal Group"
 630                 " %hu\n", a->login_timeout, tpg->tpgt);
 631
 632         return 0;
 633 }
 634
 635 int iscsit_ta_netif_timeout(
 636         struct iscsi_portal_group *tpg,
 637         u32 netif_timeout)
 638 {
 639         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 640
 641         if (netif_timeout > TA_NETIF_TIMEOUT_MAX) {
 642                 pr_err("Requested Network Interface Timeout %u larger"
 643                         " than maximum %u\n", netif_timeout,
 644                                 TA_NETIF_TIMEOUT_MAX);
 645                 return -EINVAL;
 646         } else if (netif_timeout < TA_NETIF_TIMEOUT_MIN) {
 647                 pr_err("Requested Network Interface Timeout %u smaller"
 648                         " than minimum %u\n", netif_timeout,
 649                                 TA_NETIF_TIMEOUT_MIN);
 650                 return -EINVAL;
 651         }
 652
 653         a->netif_timeout = netif_timeout;
 654         pr_debug("Set Network Interface Timeout to %u for"
 655                 " Target Portal Group %hu\n", a->netif_timeout, tpg->tpgt);
 656
 657         return 0;
 658 }
 659
 660 int iscsit_ta_generate_node_acls(
 661         struct iscsi_portal_group *tpg,
 662         u32 flag)
 663 {
 664         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 665
 666         if ((flag != 0) && (flag != 1)) {
 667                 pr_err("Illegal value %d\n", flag);
 668                 return -EINVAL;
 669         }
 670
 671         a->generate_node_acls = flag;
 672         pr_debug("iSCSI_TPG[%hu] - Generate Initiator Portal Group ACLs: %s\n",
 673                 tpg->tpgt, (a->generate_node_acls) ? "Enabled" : "Disabled");
 674
 675         return 0;
 676 }
 677
 678 int iscsit_ta_default_cmdsn_depth(
 679         struct iscsi_portal_group *tpg,
 680         u32 tcq_depth)
 681 {
 682         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 683
 684         if (tcq_depth > TA_DEFAULT_CMDSN_DEPTH_MAX) {
 685                 pr_err("Requested Default Queue Depth: %u larger"
 686                         " than maximum %u\n", tcq_depth,
 687                                 TA_DEFAULT_CMDSN_DEPTH_MAX);
 688                 return -EINVAL;
 689         } else if (tcq_depth < TA_DEFAULT_CMDSN_DEPTH_MIN) {
 690                 pr_err("Requested Default Queue Depth: %u smaller"
 691                         " than minimum %u\n", tcq_depth,
 692                                 TA_DEFAULT_CMDSN_DEPTH_MIN);
 693                 return -EINVAL;
 694         }
 695
 696         a->default_cmdsn_depth = tcq_depth;
 697         pr_debug("iSCSI_TPG[%hu] - Set Default CmdSN TCQ Depth to %u\n",
 698                 tpg->tpgt, a->default_cmdsn_depth);
 699
 700         return 0;
 701 }
 702
 703 int iscsit_ta_cache_dynamic_acls(
 704         struct iscsi_portal_group *tpg,
 705         u32 flag)
 706 {
 707         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 708
 709         if ((flag != 0) && (flag != 1)) {
 710                 pr_err("Illegal value %d\n", flag);
 711                 return -EINVAL;
 712         }
 713
 714         a->cache_dynamic_acls = flag;
 715         pr_debug("iSCSI_TPG[%hu] - Cache Dynamic Initiator Portal Group"
 716                 " ACLs %s\n", tpg->tpgt, (a->cache_dynamic_acls) ?
 717                 "Enabled" : "Disabled");
 718
 719         return 0;
 720 }
 721
 722 int iscsit_ta_demo_mode_write_protect(
 723         struct iscsi_portal_group *tpg,
 724         u32 flag)
 725 {
 726         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 727
 728         if ((flag != 0) && (flag != 1)) {
 729                 pr_err("Illegal value %d\n", flag);
 730                 return -EINVAL;
 731         }
 732
 733         a->demo_mode_write_protect = flag;
 734         pr_debug("iSCSI_TPG[%hu] - Demo Mode Write Protect bit: %s\n",
 735                 tpg->tpgt, (a->demo_mode_write_protect) ? "ON" : "OFF");
 736
 737         return 0;
 738 }
 739
 740 int iscsit_ta_prod_mode_write_protect(
 741         struct iscsi_portal_group *tpg,
 742         u32 flag)
 743 {
 744         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 745
 746         if ((flag != 0) && (flag != 1)) {
 747                 pr_err("Illegal value %d\n", flag);
 748                 return -EINVAL;
 749         }
 750
 751         a->prod_mode_write_protect = flag;
 752         pr_debug("iSCSI_TPG[%hu] - Production Mode Write Protect bit:"
 753                 " %s\n", tpg->tpgt, (a->prod_mode_write_protect) ?
 754                 "ON" : "OFF");
 755
 756         return 0;
 757 }