drivers/target/iscsi/iscsi_target_tpg.c

   1 /*******************************************************************************
   2  * This file contains iSCSI Target Portal Group related functions.
   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 <target/target_core_base.h>
  20 #include <target/target_core_fabric.h>
  21
  22 #include <target/iscsi/iscsi_target_core.h>
  23 #include "iscsi_target_erl0.h"
  24 #include "iscsi_target_login.h"
  25 #include "iscsi_target_nodeattrib.h"
  26 #include "iscsi_target_tpg.h"
  27 #include "iscsi_target_util.h"
  28 #include "iscsi_target.h"
  29 #include "iscsi_target_parameters.h"
  30
  31 #include <target/iscsi/iscsi_transport.h>
  32
  33 struct iscsi_portal_group *iscsit_alloc_portal_group(struct iscsi_tiqn *tiqn, u16 tpgt)
  34 {
  35         struct iscsi_portal_group *tpg;
  36
  37         tpg = kzalloc(sizeof(struct iscsi_portal_group), GFP_KERNEL);
  38         if (!tpg) {
  39                 pr_err("Unable to allocate struct iscsi_portal_group\n");
  40                 return NULL;
  41         }
  42
  43         tpg->tpgt = tpgt;
  44         tpg->tpg_state = TPG_STATE_FREE;
  45         tpg->tpg_tiqn = tiqn;
  46         INIT_LIST_HEAD(&tpg->tpg_gnp_list);
  47         INIT_LIST_HEAD(&tpg->tpg_list);
  48         mutex_init(&tpg->tpg_access_lock);
  49         sema_init(&tpg->np_login_sem, 1);
  50         spin_lock_init(&tpg->tpg_state_lock);
  51         spin_lock_init(&tpg->tpg_np_lock);
  52
  53         return tpg;
  54 }
  55
  56 static void iscsit_set_default_tpg_attribs(struct iscsi_portal_group *);
  57
  58 int iscsit_load_discovery_tpg(void)
  59 {
  60         struct iscsi_param *param;
  61         struct iscsi_portal_group *tpg;
  62         int ret;
  63
  64         tpg = iscsit_alloc_portal_group(NULL, 1);
  65         if (!tpg) {
  66                 pr_err("Unable to allocate struct iscsi_portal_group\n");
  67                 return -1;
  68         }
  69
  70         ret = core_tpg_register(&iscsi_ops, NULL, &tpg->tpg_se_tpg, -1);
  71         if (ret < 0) {
  72                 kfree(tpg);
  73                 return -1;
  74         }
  75
  76         tpg->sid = 1; /* First Assigned LIO Session ID */
  77         iscsit_set_default_tpg_attribs(tpg);
  78
  79         if (iscsi_create_default_params(&tpg->param_list) < 0)
  80                 goto out;
  81         /*
  82          * By default we disable authentication for discovery sessions,
  83          * this can be changed with:
  84          *
  85          * /sys/kernel/config/target/iscsi/discovery_auth/enforce_discovery_auth
  86          */
  87         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
  88         if (!param)
  89                 goto out;
  90
  91         if (iscsi_update_param_value(param, "CHAP,None") < 0)
  92                 goto out;
  93
  94         tpg->tpg_attrib.authentication = 0;
  95
  96         spin_lock(&tpg->tpg_state_lock);
  97         tpg->tpg_state  = TPG_STATE_ACTIVE;
  98         spin_unlock(&tpg->tpg_state_lock);
  99
 100         iscsit_global->discovery_tpg = tpg;
 101         pr_debug("CORE[0] - Allocated Discovery TPG\n");
 102
 103         return 0;
 104 out:
 105         if (tpg->sid == 1)
 106                 core_tpg_deregister(&tpg->tpg_se_tpg);
 107         kfree(tpg);
 108         return -1;
 109 }
 110
 111 void iscsit_release_discovery_tpg(void)
 112 {
 113         struct iscsi_portal_group *tpg = iscsit_global->discovery_tpg;
 114
 115         if (!tpg)
 116                 return;
 117
 118         core_tpg_deregister(&tpg->tpg_se_tpg);
 119
 120         kfree(tpg);
 121         iscsit_global->discovery_tpg = NULL;
 122 }
 123
 124 struct iscsi_portal_group *iscsit_get_tpg_from_np(
 125         struct iscsi_tiqn *tiqn,
 126         struct iscsi_np *np,
 127         struct iscsi_tpg_np **tpg_np_out)
 128 {
 129         struct iscsi_portal_group *tpg = NULL;
 130         struct iscsi_tpg_np *tpg_np;
 131
 132         spin_lock(&tiqn->tiqn_tpg_lock);
 133         list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) {
 134
 135                 spin_lock(&tpg->tpg_state_lock);
 136                 if (tpg->tpg_state != TPG_STATE_ACTIVE) {
 137                         spin_unlock(&tpg->tpg_state_lock);
 138                         continue;
 139                 }
 140                 spin_unlock(&tpg->tpg_state_lock);
 141
 142                 spin_lock(&tpg->tpg_np_lock);
 143                 list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
 144                         if (tpg_np->tpg_np == np) {
 145                                 *tpg_np_out = tpg_np;
 146                                 kref_get(&tpg_np->tpg_np_kref);
 147                                 spin_unlock(&tpg->tpg_np_lock);
 148                                 spin_unlock(&tiqn->tiqn_tpg_lock);
 149                                 return tpg;
 150                         }
 151                 }
 152                 spin_unlock(&tpg->tpg_np_lock);
 153         }
 154         spin_unlock(&tiqn->tiqn_tpg_lock);
 155
 156         return NULL;
 157 }
 158
 159 int iscsit_get_tpg(
 160         struct iscsi_portal_group *tpg)
 161 {
 162         return mutex_lock_interruptible(&tpg->tpg_access_lock);
 163 }
 164
 165 void iscsit_put_tpg(struct iscsi_portal_group *tpg)
 166 {
 167         mutex_unlock(&tpg->tpg_access_lock);
 168 }
 169
 170 static void iscsit_clear_tpg_np_login_thread(
 171         struct iscsi_tpg_np *tpg_np,
 172         struct iscsi_portal_group *tpg,
 173         bool shutdown)
 174 {
 175         if (!tpg_np->tpg_np) {
 176                 pr_err("struct iscsi_tpg_np->tpg_np is NULL!\n");
 177                 return;
 178         }
 179
 180         if (shutdown)
 181                 tpg_np->tpg_np->enabled = false;
 182         iscsit_reset_np_thread(tpg_np->tpg_np, tpg_np, tpg, shutdown);
 183 }
 184
 185 static void iscsit_clear_tpg_np_login_threads(
 186         struct iscsi_portal_group *tpg,
 187         bool shutdown)
 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, shutdown);
 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         a->demo_mode_discovery = TA_DEMO_MODE_DISCOVERY;
 222         a->default_erl = TA_DEFAULT_ERL;
 223         a->t10_pi = TA_DEFAULT_T10_PI;
 224         a->fabric_prot_type = TA_DEFAULT_FABRIC_PROT_TYPE;
 225 }
 226
 227 int iscsit_tpg_add_portal_group(struct iscsi_tiqn *tiqn, struct iscsi_portal_group *tpg)
 228 {
 229         if (tpg->tpg_state != TPG_STATE_FREE) {
 230                 pr_err("Unable to add iSCSI Target Portal Group: %d"
 231                         " while not in TPG_STATE_FREE state.\n", tpg->tpgt);
 232                 return -EEXIST;
 233         }
 234         iscsit_set_default_tpg_attribs(tpg);
 235
 236         if (iscsi_create_default_params(&tpg->param_list) < 0)
 237                 goto err_out;
 238
 239         tpg->tpg_attrib.tpg = tpg;
 240
 241         spin_lock(&tpg->tpg_state_lock);
 242         tpg->tpg_state  = TPG_STATE_INACTIVE;
 243         spin_unlock(&tpg->tpg_state_lock);
 244
 245         spin_lock(&tiqn->tiqn_tpg_lock);
 246         list_add_tail(&tpg->tpg_list, &tiqn->tiqn_tpg_list);
 247         tiqn->tiqn_ntpgs++;
 248         pr_debug("CORE[%s]_TPG[%hu] - Added iSCSI Target Portal Group\n",
 249                         tiqn->tiqn, tpg->tpgt);
 250         spin_unlock(&tiqn->tiqn_tpg_lock);
 251
 252         return 0;
 253 err_out:
 254         if (tpg->param_list) {
 255                 iscsi_release_param_list(tpg->param_list);
 256                 tpg->param_list = NULL;
 257         }
 258         kfree(tpg);
 259         return -ENOMEM;
 260 }
 261
 262 int iscsit_tpg_del_portal_group(
 263         struct iscsi_tiqn *tiqn,
 264         struct iscsi_portal_group *tpg,
 265         int force)
 266 {
 267         u8 old_state = tpg->tpg_state;
 268
 269         spin_lock(&tpg->tpg_state_lock);
 270         tpg->tpg_state = TPG_STATE_INACTIVE;
 271         spin_unlock(&tpg->tpg_state_lock);
 272
 273         if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
 274                 pr_err("Unable to delete iSCSI Target Portal Group:"
 275                         " %hu while active sessions exist, and force=0\n",
 276                         tpg->tpgt);
 277                 tpg->tpg_state = old_state;
 278                 return -EPERM;
 279         }
 280
 281         if (tpg->param_list) {
 282                 iscsi_release_param_list(tpg->param_list);
 283                 tpg->param_list = NULL;
 284         }
 285
 286         core_tpg_deregister(&tpg->tpg_se_tpg);
 287
 288         spin_lock(&tpg->tpg_state_lock);
 289         tpg->tpg_state = TPG_STATE_FREE;
 290         spin_unlock(&tpg->tpg_state_lock);
 291
 292         spin_lock(&tiqn->tiqn_tpg_lock);
 293         tiqn->tiqn_ntpgs--;
 294         list_del(&tpg->tpg_list);
 295         spin_unlock(&tiqn->tiqn_tpg_lock);
 296
 297         pr_debug("CORE[%s]_TPG[%hu] - Deleted iSCSI Target Portal Group\n",
 298                         tiqn->tiqn, tpg->tpgt);
 299
 300         kfree(tpg);
 301         return 0;
 302 }
 303
 304 int iscsit_tpg_enable_portal_group(struct iscsi_portal_group *tpg)
 305 {
 306         struct iscsi_param *param;
 307         struct iscsi_tiqn *tiqn = tpg->tpg_tiqn;
 308         int ret;
 309
 310         spin_lock(&tpg->tpg_state_lock);
 311         if (tpg->tpg_state == TPG_STATE_ACTIVE) {
 312                 pr_err("iSCSI target portal group: %hu is already"
 313                         " active, ignoring request.\n", tpg->tpgt);
 314                 spin_unlock(&tpg->tpg_state_lock);
 315                 return -EINVAL;
 316         }
 317         /*
 318          * Make sure that AuthMethod does not contain None as an option
 319          * unless explictly disabled.  Set the default to CHAP if authentication
 320          * is enforced (as per default), and remove the NONE option.
 321          */
 322         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
 323         if (!param) {
 324                 spin_unlock(&tpg->tpg_state_lock);
 325                 return -EINVAL;
 326         }
 327
 328         if (tpg->tpg_attrib.authentication) {
 329                 if (!strcmp(param->value, NONE)) {
 330                         ret = iscsi_update_param_value(param, CHAP);
 331                         if (ret)
 332                                 goto err;
 333                 }
 334
 335                 ret = iscsit_ta_authentication(tpg, 1);
 336                 if (ret < 0)
 337                         goto err;
 338         }
 339
 340         tpg->tpg_state = TPG_STATE_ACTIVE;
 341         spin_unlock(&tpg->tpg_state_lock);
 342
 343         spin_lock(&tiqn->tiqn_tpg_lock);
 344         tiqn->tiqn_active_tpgs++;
 345         pr_debug("iSCSI_TPG[%hu] - Enabled iSCSI Target Portal Group\n",
 346                         tpg->tpgt);
 347         spin_unlock(&tiqn->tiqn_tpg_lock);
 348
 349         return 0;
 350
 351 err:
 352         spin_unlock(&tpg->tpg_state_lock);
 353         return ret;
 354 }
 355
 356 int iscsit_tpg_disable_portal_group(struct iscsi_portal_group *tpg, int force)
 357 {
 358         struct iscsi_tiqn *tiqn;
 359         u8 old_state = tpg->tpg_state;
 360
 361         spin_lock(&tpg->tpg_state_lock);
 362         if (tpg->tpg_state == TPG_STATE_INACTIVE) {
 363                 pr_err("iSCSI Target Portal Group: %hu is already"
 364                         " inactive, ignoring request.\n", tpg->tpgt);
 365                 spin_unlock(&tpg->tpg_state_lock);
 366                 return -EINVAL;
 367         }
 368         tpg->tpg_state = TPG_STATE_INACTIVE;
 369         spin_unlock(&tpg->tpg_state_lock);
 370
 371         iscsit_clear_tpg_np_login_threads(tpg, false);
 372
 373         if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
 374                 spin_lock(&tpg->tpg_state_lock);
 375                 tpg->tpg_state = old_state;
 376                 spin_unlock(&tpg->tpg_state_lock);
 377                 pr_err("Unable to disable iSCSI Target Portal Group:"
 378                         " %hu while active sessions exist, and force=0\n",
 379                         tpg->tpgt);
 380                 return -EPERM;
 381         }
 382
 383         tiqn = tpg->tpg_tiqn;
 384         if (!tiqn || (tpg == iscsit_global->discovery_tpg))
 385                 return 0;
 386
 387         spin_lock(&tiqn->tiqn_tpg_lock);
 388         tiqn->tiqn_active_tpgs--;
 389         pr_debug("iSCSI_TPG[%hu] - Disabled iSCSI Target Portal Group\n",
 390                         tpg->tpgt);
 391         spin_unlock(&tiqn->tiqn_tpg_lock);
 392
 393         return 0;
 394 }
 395
 396 struct iscsi_node_attrib *iscsit_tpg_get_node_attrib(
 397         struct iscsi_session *sess)
 398 {
 399         struct se_session *se_sess = sess->se_sess;
 400         struct se_node_acl *se_nacl = se_sess->se_node_acl;
 401         struct iscsi_node_acl *acl = container_of(se_nacl, struct iscsi_node_acl,
 402                                         se_node_acl);
 403
 404         return &acl->node_attrib;
 405 }
 406
 407 struct iscsi_tpg_np *iscsit_tpg_locate_child_np(
 408         struct iscsi_tpg_np *tpg_np,
 409         int network_transport)
 410 {
 411         struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
 412
 413         spin_lock(&tpg_np->tpg_np_parent_lock);
 414         list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
 415                         &tpg_np->tpg_np_parent_list, tpg_np_child_list) {
 416                 if (tpg_np_child->tpg_np->np_network_transport ==
 417                                 network_transport) {
 418                         spin_unlock(&tpg_np->tpg_np_parent_lock);
 419                         return tpg_np_child;
 420                 }
 421         }
 422         spin_unlock(&tpg_np->tpg_np_parent_lock);
 423
 424         return NULL;
 425 }
 426
 427 static bool iscsit_tpg_check_network_portal(
 428         struct iscsi_tiqn *tiqn,
 429         struct __kernel_sockaddr_storage *sockaddr,
 430         int network_transport)
 431 {
 432         struct iscsi_portal_group *tpg;
 433         struct iscsi_tpg_np *tpg_np;
 434         struct iscsi_np *np;
 435         bool match = false;
 436
 437         spin_lock(&tiqn->tiqn_tpg_lock);
 438         list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) {
 439
 440                 spin_lock(&tpg->tpg_np_lock);
 441                 list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
 442                         np = tpg_np->tpg_np;
 443
 444                         match = iscsit_check_np_match(sockaddr, np,
 445                                                 network_transport);
 446                         if (match)
 447                                 break;
 448                 }
 449                 spin_unlock(&tpg->tpg_np_lock);
 450         }
 451         spin_unlock(&tiqn->tiqn_tpg_lock);
 452
 453         return match;
 454 }
 455
 456 struct iscsi_tpg_np *iscsit_tpg_add_network_portal(
 457         struct iscsi_portal_group *tpg,
 458         struct __kernel_sockaddr_storage *sockaddr,
 459         char *ip_str,
 460         struct iscsi_tpg_np *tpg_np_parent,
 461         int network_transport)
 462 {
 463         struct iscsi_np *np;
 464         struct iscsi_tpg_np *tpg_np;
 465
 466         if (!tpg_np_parent) {
 467                 if (iscsit_tpg_check_network_portal(tpg->tpg_tiqn, sockaddr,
 468                                 network_transport)) {
 469                         pr_err("Network Portal: %s already exists on a"
 470                                 " different TPG on %s\n", ip_str,
 471                                 tpg->tpg_tiqn->tiqn);
 472                         return ERR_PTR(-EEXIST);
 473                 }
 474         }
 475
 476         tpg_np = kzalloc(sizeof(struct iscsi_tpg_np), GFP_KERNEL);
 477         if (!tpg_np) {
 478                 pr_err("Unable to allocate memory for"
 479                                 " struct iscsi_tpg_np.\n");
 480                 return ERR_PTR(-ENOMEM);
 481         }
 482
 483         np = iscsit_add_np(sockaddr, ip_str, network_transport);
 484         if (IS_ERR(np)) {
 485                 kfree(tpg_np);
 486                 return ERR_CAST(np);
 487         }
 488
 489         INIT_LIST_HEAD(&tpg_np->tpg_np_list);
 490         INIT_LIST_HEAD(&tpg_np->tpg_np_child_list);
 491         INIT_LIST_HEAD(&tpg_np->tpg_np_parent_list);
 492         spin_lock_init(&tpg_np->tpg_np_parent_lock);
 493         init_completion(&tpg_np->tpg_np_comp);
 494         kref_init(&tpg_np->tpg_np_kref);
 495         tpg_np->tpg_np          = np;
 496         tpg_np->tpg             = tpg;
 497
 498         spin_lock(&tpg->tpg_np_lock);
 499         list_add_tail(&tpg_np->tpg_np_list, &tpg->tpg_gnp_list);
 500         tpg->num_tpg_nps++;
 501         if (tpg->tpg_tiqn)
 502                 tpg->tpg_tiqn->tiqn_num_tpg_nps++;
 503         spin_unlock(&tpg->tpg_np_lock);
 504
 505         if (tpg_np_parent) {
 506                 tpg_np->tpg_np_parent = tpg_np_parent;
 507                 spin_lock(&tpg_np_parent->tpg_np_parent_lock);
 508                 list_add_tail(&tpg_np->tpg_np_child_list,
 509                         &tpg_np_parent->tpg_np_parent_list);
 510                 spin_unlock(&tpg_np_parent->tpg_np_parent_lock);
 511         }
 512
 513         pr_debug("CORE[%s] - Added Network Portal: %s:%hu,%hu on %s\n",
 514                 tpg->tpg_tiqn->tiqn, np->np_ip, np->np_port, tpg->tpgt,
 515                 np->np_transport->name);
 516
 517         return tpg_np;
 518 }
 519
 520 static int iscsit_tpg_release_np(
 521         struct iscsi_tpg_np *tpg_np,
 522         struct iscsi_portal_group *tpg,
 523         struct iscsi_np *np)
 524 {
 525         iscsit_clear_tpg_np_login_thread(tpg_np, tpg, true);
 526
 527         pr_debug("CORE[%s] - Removed Network Portal: %s:%hu,%hu on %s\n",
 528                 tpg->tpg_tiqn->tiqn, np->np_ip, np->np_port, tpg->tpgt,
 529                 np->np_transport->name);
 530
 531         tpg_np->tpg_np = NULL;
 532         tpg_np->tpg = NULL;
 533         kfree(tpg_np);
 534         /*
 535          * iscsit_del_np() will shutdown struct iscsi_np when last TPG reference is released.
 536          */
 537         return iscsit_del_np(np);
 538 }
 539
 540 int iscsit_tpg_del_network_portal(
 541         struct iscsi_portal_group *tpg,
 542         struct iscsi_tpg_np *tpg_np)
 543 {
 544         struct iscsi_np *np;
 545         struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
 546         int ret = 0;
 547
 548         np = tpg_np->tpg_np;
 549         if (!np) {
 550                 pr_err("Unable to locate struct iscsi_np from"
 551                                 " struct iscsi_tpg_np\n");
 552                 return -EINVAL;
 553         }
 554
 555         if (!tpg_np->tpg_np_parent) {
 556                 /*
 557                  * We are the parent tpg network portal.  Release all of the
 558                  * child tpg_np's (eg: the non ISCSI_TCP ones) on our parent
 559                  * list first.
 560                  */
 561                 list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
 562                                 &tpg_np->tpg_np_parent_list,
 563                                 tpg_np_child_list) {
 564                         ret = iscsit_tpg_del_network_portal(tpg, tpg_np_child);
 565                         if (ret < 0)
 566                                 pr_err("iscsit_tpg_del_network_portal()"
 567                                         " failed: %d\n", ret);
 568                 }
 569         } else {
 570                 /*
 571                  * We are not the parent ISCSI_TCP tpg network portal.  Release
 572                  * our own network portals from the child list.
 573                  */
 574                 spin_lock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
 575                 list_del(&tpg_np->tpg_np_child_list);
 576                 spin_unlock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
 577         }
 578
 579         spin_lock(&tpg->tpg_np_lock);
 580         list_del(&tpg_np->tpg_np_list);
 581         tpg->num_tpg_nps--;
 582         if (tpg->tpg_tiqn)
 583                 tpg->tpg_tiqn->tiqn_num_tpg_nps--;
 584         spin_unlock(&tpg->tpg_np_lock);
 585
 586         return iscsit_tpg_release_np(tpg_np, tpg, np);
 587 }
 588
 589 int iscsit_tpg_set_initiator_node_queue_depth(
 590         struct iscsi_portal_group *tpg,
 591         unsigned char *initiatorname,
 592         u32 queue_depth,
 593         int force)
 594 {
 595         return core_tpg_set_initiator_node_queue_depth(&tpg->tpg_se_tpg,
 596                 initiatorname, queue_depth, force);
 597 }
 598
 599 int iscsit_ta_authentication(struct iscsi_portal_group *tpg, u32 authentication)
 600 {
 601         unsigned char buf1[256], buf2[256], *none = NULL;
 602         int len;
 603         struct iscsi_param *param;
 604         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 605
 606         if ((authentication != 1) && (authentication != 0)) {
 607                 pr_err("Illegal value for authentication parameter:"
 608                         " %u, ignoring request.\n", authentication);
 609                 return -EINVAL;
 610         }
 611
 612         memset(buf1, 0, sizeof(buf1));
 613         memset(buf2, 0, sizeof(buf2));
 614
 615         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
 616         if (!param)
 617                 return -EINVAL;
 618
 619         if (authentication) {
 620                 snprintf(buf1, sizeof(buf1), "%s", param->value);
 621                 none = strstr(buf1, NONE);
 622                 if (!none)
 623                         goto out;
 624                 if (!strncmp(none + 4, ",", 1)) {
 625                         if (!strcmp(buf1, none))
 626                                 sprintf(buf2, "%s", none+5);
 627                         else {
 628                                 none--;
 629                                 *none = '\0';
 630                                 len = sprintf(buf2, "%s", buf1);
 631                                 none += 5;
 632                                 sprintf(buf2 + len, "%s", none);
 633                         }
 634                 } else {
 635                         none--;
 636                         *none = '\0';
 637                         sprintf(buf2, "%s", buf1);
 638                 }
 639                 if (iscsi_update_param_value(param, buf2) < 0)
 640                         return -EINVAL;
 641         } else {
 642                 snprintf(buf1, sizeof(buf1), "%s", param->value);
 643                 none = strstr(buf1, NONE);
 644                 if (none)
 645                         goto out;
 646                 strncat(buf1, ",", strlen(","));
 647                 strncat(buf1, NONE, strlen(NONE));
 648                 if (iscsi_update_param_value(param, buf1) < 0)
 649                         return -EINVAL;
 650         }
 651
 652 out:
 653         a->authentication = authentication;
 654         pr_debug("%s iSCSI Authentication Methods for TPG: %hu.\n",
 655                 a->authentication ? "Enforcing" : "Disabling", tpg->tpgt);
 656
 657         return 0;
 658 }
 659
 660 int iscsit_ta_login_timeout(
 661         struct iscsi_portal_group *tpg,
 662         u32 login_timeout)
 663 {
 664         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 665
 666         if (login_timeout > TA_LOGIN_TIMEOUT_MAX) {
 667                 pr_err("Requested Login Timeout %u larger than maximum"
 668                         " %u\n", login_timeout, TA_LOGIN_TIMEOUT_MAX);
 669                 return -EINVAL;
 670         } else if (login_timeout < TA_LOGIN_TIMEOUT_MIN) {
 671                 pr_err("Requested Logout Timeout %u smaller than"
 672                         " minimum %u\n", login_timeout, TA_LOGIN_TIMEOUT_MIN);
 673                 return -EINVAL;
 674         }
 675
 676         a->login_timeout = login_timeout;
 677         pr_debug("Set Logout Timeout to %u for Target Portal Group"
 678                 " %hu\n", a->login_timeout, tpg->tpgt);
 679
 680         return 0;
 681 }
 682
 683 int iscsit_ta_netif_timeout(
 684         struct iscsi_portal_group *tpg,
 685         u32 netif_timeout)
 686 {
 687         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 688
 689         if (netif_timeout > TA_NETIF_TIMEOUT_MAX) {
 690                 pr_err("Requested Network Interface Timeout %u larger"
 691                         " than maximum %u\n", netif_timeout,
 692                                 TA_NETIF_TIMEOUT_MAX);
 693                 return -EINVAL;
 694         } else if (netif_timeout < TA_NETIF_TIMEOUT_MIN) {
 695                 pr_err("Requested Network Interface Timeout %u smaller"
 696                         " than minimum %u\n", netif_timeout,
 697                                 TA_NETIF_TIMEOUT_MIN);
 698                 return -EINVAL;
 699         }
 700
 701         a->netif_timeout = netif_timeout;
 702         pr_debug("Set Network Interface Timeout to %u for"
 703                 " Target Portal Group %hu\n", a->netif_timeout, tpg->tpgt);
 704
 705         return 0;
 706 }
 707
 708 int iscsit_ta_generate_node_acls(
 709         struct iscsi_portal_group *tpg,
 710         u32 flag)
 711 {
 712         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 713
 714         if ((flag != 0) && (flag != 1)) {
 715                 pr_err("Illegal value %d\n", flag);
 716                 return -EINVAL;
 717         }
 718
 719         a->generate_node_acls = flag;
 720         pr_debug("iSCSI_TPG[%hu] - Generate Initiator Portal Group ACLs: %s\n",
 721                 tpg->tpgt, (a->generate_node_acls) ? "Enabled" : "Disabled");
 722
 723         if (flag == 1 && a->cache_dynamic_acls == 0) {
 724                 pr_debug("Explicitly setting cache_dynamic_acls=1 when "
 725                         "generate_node_acls=1\n");
 726                 a->cache_dynamic_acls = 1;
 727         }
 728
 729         return 0;
 730 }
 731
 732 int iscsit_ta_default_cmdsn_depth(
 733         struct iscsi_portal_group *tpg,
 734         u32 tcq_depth)
 735 {
 736         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 737
 738         if (tcq_depth > TA_DEFAULT_CMDSN_DEPTH_MAX) {
 739                 pr_err("Requested Default Queue Depth: %u larger"
 740                         " than maximum %u\n", tcq_depth,
 741                                 TA_DEFAULT_CMDSN_DEPTH_MAX);
 742                 return -EINVAL;
 743         } else if (tcq_depth < TA_DEFAULT_CMDSN_DEPTH_MIN) {
 744                 pr_err("Requested Default Queue Depth: %u smaller"
 745                         " than minimum %u\n", tcq_depth,
 746                                 TA_DEFAULT_CMDSN_DEPTH_MIN);
 747                 return -EINVAL;
 748         }
 749
 750         a->default_cmdsn_depth = tcq_depth;
 751         pr_debug("iSCSI_TPG[%hu] - Set Default CmdSN TCQ Depth to %u\n",
 752                 tpg->tpgt, a->default_cmdsn_depth);
 753
 754         return 0;
 755 }
 756
 757 int iscsit_ta_cache_dynamic_acls(
 758         struct iscsi_portal_group *tpg,
 759         u32 flag)
 760 {
 761         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 762
 763         if ((flag != 0) && (flag != 1)) {
 764                 pr_err("Illegal value %d\n", flag);
 765                 return -EINVAL;
 766         }
 767
 768         if (a->generate_node_acls == 1 && flag == 0) {
 769                 pr_debug("Skipping cache_dynamic_acls=0 when"
 770                         " generate_node_acls=1\n");
 771                 return 0;
 772         }
 773
 774         a->cache_dynamic_acls = flag;
 775         pr_debug("iSCSI_TPG[%hu] - Cache Dynamic Initiator Portal Group"
 776                 " ACLs %s\n", tpg->tpgt, (a->cache_dynamic_acls) ?
 777                 "Enabled" : "Disabled");
 778
 779         return 0;
 780 }
 781
 782 int iscsit_ta_demo_mode_write_protect(
 783         struct iscsi_portal_group *tpg,
 784         u32 flag)
 785 {
 786         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 787
 788         if ((flag != 0) && (flag != 1)) {
 789                 pr_err("Illegal value %d\n", flag);
 790                 return -EINVAL;
 791         }
 792
 793         a->demo_mode_write_protect = flag;
 794         pr_debug("iSCSI_TPG[%hu] - Demo Mode Write Protect bit: %s\n",
 795                 tpg->tpgt, (a->demo_mode_write_protect) ? "ON" : "OFF");
 796
 797         return 0;
 798 }
 799
 800 int iscsit_ta_prod_mode_write_protect(
 801         struct iscsi_portal_group *tpg,
 802         u32 flag)
 803 {
 804         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 805
 806         if ((flag != 0) && (flag != 1)) {
 807                 pr_err("Illegal value %d\n", flag);
 808                 return -EINVAL;
 809         }
 810
 811         a->prod_mode_write_protect = flag;
 812         pr_debug("iSCSI_TPG[%hu] - Production Mode Write Protect bit:"
 813                 " %s\n", tpg->tpgt, (a->prod_mode_write_protect) ?
 814                 "ON" : "OFF");
 815
 816         return 0;
 817 }
 818
 819 int iscsit_ta_demo_mode_discovery(
 820         struct iscsi_portal_group *tpg,
 821         u32 flag)
 822 {
 823         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 824
 825         if ((flag != 0) && (flag != 1)) {
 826                 pr_err("Illegal value %d\n", flag);
 827                 return -EINVAL;
 828         }
 829
 830         a->demo_mode_discovery = flag;
 831         pr_debug("iSCSI_TPG[%hu] - Demo Mode Discovery bit:"
 832                 " %s\n", tpg->tpgt, (a->demo_mode_discovery) ?
 833                 "ON" : "OFF");
 834
 835         return 0;
 836 }
 837
 838 int iscsit_ta_default_erl(
 839         struct iscsi_portal_group *tpg,
 840         u32 default_erl)
 841 {
 842         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 843
 844         if ((default_erl != 0) && (default_erl != 1) && (default_erl != 2)) {
 845                 pr_err("Illegal value for default_erl: %u\n", default_erl);
 846                 return -EINVAL;
 847         }
 848
 849         a->default_erl = default_erl;
 850         pr_debug("iSCSI_TPG[%hu] - DefaultERL: %u\n", tpg->tpgt, a->default_erl);
 851
 852         return 0;
 853 }
 854
 855 int iscsit_ta_t10_pi(
 856         struct iscsi_portal_group *tpg,
 857         u32 flag)
 858 {
 859         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 860
 861         if ((flag != 0) && (flag != 1)) {
 862                 pr_err("Illegal value %d\n", flag);
 863                 return -EINVAL;
 864         }
 865
 866         a->t10_pi = flag;
 867         pr_debug("iSCSI_TPG[%hu] - T10 Protection information bit:"
 868                 " %s\n", tpg->tpgt, (a->t10_pi) ?
 869                 "ON" : "OFF");
 870
 871         return 0;
 872 }
 873
 874 int iscsit_ta_fabric_prot_type(
 875         struct iscsi_portal_group *tpg,
 876         u32 prot_type)
 877 {
 878         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 879
 880         if ((prot_type != 0) && (prot_type != 1) && (prot_type != 3)) {
 881                 pr_err("Illegal value for fabric_prot_type: %u\n", prot_type);
 882                 return -EINVAL;
 883         }
 884
 885         a->fabric_prot_type = prot_type;
 886         pr_debug("iSCSI_TPG[%hu] - T10 Fabric Protection Type: %u\n",
 887                  tpg->tpgt, prot_type);
 888
 889         return 0;
 890 }