Pileus Git - ~andy/linux/blob - 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 #include <target/iscsi/iscsi_transport.h>
  35
  36 struct iscsi_portal_group *iscsit_alloc_portal_group(struct iscsi_tiqn *tiqn, u16 tpgt)
  37 {
  38         struct iscsi_portal_group *tpg;
  39
  40         tpg = kzalloc(sizeof(struct iscsi_portal_group), GFP_KERNEL);
  41         if (!tpg) {
  42                 pr_err("Unable to allocate struct iscsi_portal_group\n");
  43                 return NULL;
  44         }
  45
  46         tpg->tpgt = tpgt;
  47         tpg->tpg_state = TPG_STATE_FREE;
  48         tpg->tpg_tiqn = tiqn;
  49         INIT_LIST_HEAD(&tpg->tpg_gnp_list);
  50         INIT_LIST_HEAD(&tpg->tpg_list);
  51         mutex_init(&tpg->tpg_access_lock);
  52         sema_init(&tpg->np_login_sem, 1);
  53         spin_lock_init(&tpg->tpg_state_lock);
  54         spin_lock_init(&tpg->tpg_np_lock);
  55
  56         return tpg;
  57 }
  58
  59 static void iscsit_set_default_tpg_attribs(struct iscsi_portal_group *);
  60
  61 int iscsit_load_discovery_tpg(void)
  62 {
  63         struct iscsi_param *param;
  64         struct iscsi_portal_group *tpg;
  65         int ret;
  66
  67         tpg = iscsit_alloc_portal_group(NULL, 1);
  68         if (!tpg) {
  69                 pr_err("Unable to allocate struct iscsi_portal_group\n");
  70                 return -1;
  71         }
  72
  73         ret = core_tpg_register(
  74                         &lio_target_fabric_configfs->tf_ops,
  75                         NULL, &tpg->tpg_se_tpg, tpg,
  76                         TRANSPORT_TPG_TYPE_DISCOVERY);
  77         if (ret < 0) {
  78                 kfree(tpg);
  79                 return -1;
  80         }
  81
  82         tpg->sid = 1; /* First Assigned LIO Session ID */
  83         iscsit_set_default_tpg_attribs(tpg);
  84
  85         if (iscsi_create_default_params(&tpg->param_list) < 0)
  86                 goto out;
  87         /*
  88          * By default we disable authentication for discovery sessions,
  89          * this can be changed with:
  90          *
  91          * /sys/kernel/config/target/iscsi/discovery_auth/enforce_discovery_auth
  92          */
  93         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
  94         if (!param)
  95                 goto out;
  96
  97         if (iscsi_update_param_value(param, "CHAP,None") < 0)
  98                 goto out;
  99
 100         tpg->tpg_attrib.authentication = 0;
 101
 102         spin_lock(&tpg->tpg_state_lock);
 103         tpg->tpg_state  = TPG_STATE_ACTIVE;
 104         spin_unlock(&tpg->tpg_state_lock);
 105
 106         iscsit_global->discovery_tpg = tpg;
 107         pr_debug("CORE[0] - Allocated Discovery TPG\n");
 108
 109         return 0;
 110 out:
 111         if (tpg->sid == 1)
 112                 core_tpg_deregister(&tpg->tpg_se_tpg);
 113         kfree(tpg);
 114         return -1;
 115 }
 116
 117 void iscsit_release_discovery_tpg(void)
 118 {
 119         struct iscsi_portal_group *tpg = iscsit_global->discovery_tpg;
 120
 121         if (!tpg)
 122                 return;
 123
 124         core_tpg_deregister(&tpg->tpg_se_tpg);
 125
 126         kfree(tpg);
 127         iscsit_global->discovery_tpg = NULL;
 128 }
 129
 130 struct iscsi_portal_group *iscsit_get_tpg_from_np(
 131         struct iscsi_tiqn *tiqn,
 132         struct iscsi_np *np)
 133 {
 134         struct iscsi_portal_group *tpg = NULL;
 135         struct iscsi_tpg_np *tpg_np;
 136
 137         spin_lock(&tiqn->tiqn_tpg_lock);
 138         list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) {
 139
 140                 spin_lock(&tpg->tpg_state_lock);
 141                 if (tpg->tpg_state == TPG_STATE_FREE) {
 142                         spin_unlock(&tpg->tpg_state_lock);
 143                         continue;
 144                 }
 145                 spin_unlock(&tpg->tpg_state_lock);
 146
 147                 spin_lock(&tpg->tpg_np_lock);
 148                 list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
 149                         if (tpg_np->tpg_np == np) {
 150                                 spin_unlock(&tpg->tpg_np_lock);
 151                                 spin_unlock(&tiqn->tiqn_tpg_lock);
 152                                 return tpg;
 153                         }
 154                 }
 155                 spin_unlock(&tpg->tpg_np_lock);
 156         }
 157         spin_unlock(&tiqn->tiqn_tpg_lock);
 158
 159         return NULL;
 160 }
 161
 162 int iscsit_get_tpg(
 163         struct iscsi_portal_group *tpg)
 164 {
 165         int ret;
 166
 167         ret = mutex_lock_interruptible(&tpg->tpg_access_lock);
 168         return ((ret != 0) || signal_pending(current)) ? -1 : 0;
 169 }
 170
 171 void iscsit_put_tpg(struct iscsi_portal_group *tpg)
 172 {
 173         mutex_unlock(&tpg->tpg_access_lock);
 174 }
 175
 176 static void iscsit_clear_tpg_np_login_thread(
 177         struct iscsi_tpg_np *tpg_np,
 178         struct iscsi_portal_group *tpg,
 179         bool shutdown)
 180 {
 181         if (!tpg_np->tpg_np) {
 182                 pr_err("struct iscsi_tpg_np->tpg_np is NULL!\n");
 183                 return;
 184         }
 185
 186         iscsit_reset_np_thread(tpg_np->tpg_np, tpg_np, tpg, shutdown);
 187 }
 188
 189 void iscsit_clear_tpg_np_login_threads(
 190         struct iscsi_portal_group *tpg,
 191         bool shutdown)
 192 {
 193         struct iscsi_tpg_np *tpg_np;
 194
 195         spin_lock(&tpg->tpg_np_lock);
 196         list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
 197                 if (!tpg_np->tpg_np) {
 198                         pr_err("struct iscsi_tpg_np->tpg_np is NULL!\n");
 199                         continue;
 200                 }
 201                 spin_unlock(&tpg->tpg_np_lock);
 202                 iscsit_clear_tpg_np_login_thread(tpg_np, tpg, shutdown);
 203                 spin_lock(&tpg->tpg_np_lock);
 204         }
 205         spin_unlock(&tpg->tpg_np_lock);
 206 }
 207
 208 void iscsit_tpg_dump_params(struct iscsi_portal_group *tpg)
 209 {
 210         iscsi_print_params(tpg->param_list);
 211 }
 212
 213 static void iscsit_set_default_tpg_attribs(struct iscsi_portal_group *tpg)
 214 {
 215         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 216
 217         a->authentication = TA_AUTHENTICATION;
 218         a->login_timeout = TA_LOGIN_TIMEOUT;
 219         a->netif_timeout = TA_NETIF_TIMEOUT;
 220         a->default_cmdsn_depth = TA_DEFAULT_CMDSN_DEPTH;
 221         a->generate_node_acls = TA_GENERATE_NODE_ACLS;
 222         a->cache_dynamic_acls = TA_CACHE_DYNAMIC_ACLS;
 223         a->demo_mode_write_protect = TA_DEMO_MODE_WRITE_PROTECT;
 224         a->prod_mode_write_protect = TA_PROD_MODE_WRITE_PROTECT;
 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         ISCSI_TPG_ATTRIB(tpg)->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         iscsit_clear_tpg_np_login_threads(tpg, true);
 274
 275         if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
 276                 pr_err("Unable to delete iSCSI Target Portal Group:"
 277                         " %hu while active sessions exist, and force=0\n",
 278                         tpg->tpgt);
 279                 tpg->tpg_state = old_state;
 280                 return -EPERM;
 281         }
 282
 283         core_tpg_clear_object_luns(&tpg->tpg_se_tpg);
 284
 285         if (tpg->param_list) {
 286                 iscsi_release_param_list(tpg->param_list);
 287                 tpg->param_list = NULL;
 288         }
 289
 290         core_tpg_deregister(&tpg->tpg_se_tpg);
 291
 292         spin_lock(&tpg->tpg_state_lock);
 293         tpg->tpg_state = TPG_STATE_FREE;
 294         spin_unlock(&tpg->tpg_state_lock);
 295
 296         spin_lock(&tiqn->tiqn_tpg_lock);
 297         tiqn->tiqn_ntpgs--;
 298         list_del(&tpg->tpg_list);
 299         spin_unlock(&tiqn->tiqn_tpg_lock);
 300
 301         pr_debug("CORE[%s]_TPG[%hu] - Deleted iSCSI Target Portal Group\n",
 302                         tiqn->tiqn, tpg->tpgt);
 303
 304         kfree(tpg);
 305         return 0;
 306 }
 307
 308 int iscsit_tpg_enable_portal_group(struct iscsi_portal_group *tpg)
 309 {
 310         struct iscsi_param *param;
 311         struct iscsi_tiqn *tiqn = tpg->tpg_tiqn;
 312         int ret;
 313
 314         spin_lock(&tpg->tpg_state_lock);
 315         if (tpg->tpg_state == TPG_STATE_ACTIVE) {
 316                 pr_err("iSCSI target portal group: %hu is already"
 317                         " active, ignoring request.\n", tpg->tpgt);
 318                 spin_unlock(&tpg->tpg_state_lock);
 319                 return -EINVAL;
 320         }
 321         /*
 322          * Make sure that AuthMethod does not contain None as an option
 323          * unless explictly disabled.  Set the default to CHAP if authentication
 324          * is enforced (as per default), and remove the NONE option.
 325          */
 326         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
 327         if (!param) {
 328                 spin_unlock(&tpg->tpg_state_lock);
 329                 return -EINVAL;
 330         }
 331
 332         if (ISCSI_TPG_ATTRIB(tpg)->authentication) {
 333                 if (!strcmp(param->value, NONE)) {
 334                         ret = iscsi_update_param_value(param, CHAP);
 335                         if (ret)
 336                                 goto err;
 337                 }
 338
 339                 ret = iscsit_ta_authentication(tpg, 1);
 340                 if (ret < 0)
 341                         goto err;
 342         }
 343
 344         tpg->tpg_state = TPG_STATE_ACTIVE;
 345         spin_unlock(&tpg->tpg_state_lock);
 346
 347         spin_lock(&tiqn->tiqn_tpg_lock);
 348         tiqn->tiqn_active_tpgs++;
 349         pr_debug("iSCSI_TPG[%hu] - Enabled iSCSI Target Portal Group\n",
 350                         tpg->tpgt);
 351         spin_unlock(&tiqn->tiqn_tpg_lock);
 352
 353         return 0;
 354
 355 err:
 356         spin_unlock(&tpg->tpg_state_lock);
 357         return ret;
 358 }
 359
 360 int iscsit_tpg_disable_portal_group(struct iscsi_portal_group *tpg, int force)
 361 {
 362         struct iscsi_tiqn *tiqn;
 363         u8 old_state = tpg->tpg_state;
 364
 365         spin_lock(&tpg->tpg_state_lock);
 366         if (tpg->tpg_state == TPG_STATE_INACTIVE) {
 367                 pr_err("iSCSI Target Portal Group: %hu is already"
 368                         " inactive, ignoring request.\n", tpg->tpgt);
 369                 spin_unlock(&tpg->tpg_state_lock);
 370                 return -EINVAL;
 371         }
 372         tpg->tpg_state = TPG_STATE_INACTIVE;
 373         spin_unlock(&tpg->tpg_state_lock);
 374
 375         iscsit_clear_tpg_np_login_threads(tpg, false);
 376
 377         if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
 378                 spin_lock(&tpg->tpg_state_lock);
 379                 tpg->tpg_state = old_state;
 380                 spin_unlock(&tpg->tpg_state_lock);
 381                 pr_err("Unable to disable iSCSI Target Portal Group:"
 382                         " %hu while active sessions exist, and force=0\n",
 383                         tpg->tpgt);
 384                 return -EPERM;
 385         }
 386
 387         tiqn = tpg->tpg_tiqn;
 388         if (!tiqn || (tpg == iscsit_global->discovery_tpg))
 389                 return 0;
 390
 391         spin_lock(&tiqn->tiqn_tpg_lock);
 392         tiqn->tiqn_active_tpgs--;
 393         pr_debug("iSCSI_TPG[%hu] - Disabled iSCSI Target Portal Group\n",
 394                         tpg->tpgt);
 395         spin_unlock(&tiqn->tiqn_tpg_lock);
 396
 397         return 0;
 398 }
 399
 400 struct iscsi_node_attrib *iscsit_tpg_get_node_attrib(
 401         struct iscsi_session *sess)
 402 {
 403         struct se_session *se_sess = sess->se_sess;
 404         struct se_node_acl *se_nacl = se_sess->se_node_acl;
 405         struct iscsi_node_acl *acl = container_of(se_nacl, struct iscsi_node_acl,
 406                                         se_node_acl);
 407
 408         return &acl->node_attrib;
 409 }
 410
 411 struct iscsi_tpg_np *iscsit_tpg_locate_child_np(
 412         struct iscsi_tpg_np *tpg_np,
 413         int network_transport)
 414 {
 415         struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
 416
 417         spin_lock(&tpg_np->tpg_np_parent_lock);
 418         list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
 419                         &tpg_np->tpg_np_parent_list, tpg_np_child_list) {
 420                 if (tpg_np_child->tpg_np->np_network_transport ==
 421                                 network_transport) {
 422                         spin_unlock(&tpg_np->tpg_np_parent_lock);
 423                         return tpg_np_child;
 424                 }
 425         }
 426         spin_unlock(&tpg_np->tpg_np_parent_lock);
 427
 428         return NULL;
 429 }
 430
 431 static bool iscsit_tpg_check_network_portal(
 432         struct iscsi_tiqn *tiqn,
 433         struct __kernel_sockaddr_storage *sockaddr,
 434         int network_transport)
 435 {
 436         struct iscsi_portal_group *tpg;
 437         struct iscsi_tpg_np *tpg_np;
 438         struct iscsi_np *np;
 439         bool match = false;
 440
 441         spin_lock(&tiqn->tiqn_tpg_lock);
 442         list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) {
 443
 444                 spin_lock(&tpg->tpg_np_lock);
 445                 list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
 446                         np = tpg_np->tpg_np;
 447
 448                         match = iscsit_check_np_match(sockaddr, np,
 449                                                 network_transport);
 450                         if (match == true)
 451                                 break;
 452                 }
 453                 spin_unlock(&tpg->tpg_np_lock);
 454         }
 455         spin_unlock(&tiqn->tiqn_tpg_lock);
 456
 457         return match;
 458 }
 459
 460 struct iscsi_tpg_np *iscsit_tpg_add_network_portal(
 461         struct iscsi_portal_group *tpg,
 462         struct __kernel_sockaddr_storage *sockaddr,
 463         char *ip_str,
 464         struct iscsi_tpg_np *tpg_np_parent,
 465         int network_transport)
 466 {
 467         struct iscsi_np *np;
 468         struct iscsi_tpg_np *tpg_np;
 469
 470         if (!tpg_np_parent) {
 471                 if (iscsit_tpg_check_network_portal(tpg->tpg_tiqn, sockaddr,
 472                                 network_transport) == true) {
 473                         pr_err("Network Portal: %s already exists on a"
 474                                 " different TPG on %s\n", ip_str,
 475                                 tpg->tpg_tiqn->tiqn);
 476                         return ERR_PTR(-EEXIST);
 477                 }
 478         }
 479
 480         tpg_np = kzalloc(sizeof(struct iscsi_tpg_np), GFP_KERNEL);
 481         if (!tpg_np) {
 482                 pr_err("Unable to allocate memory for"
 483                                 " struct iscsi_tpg_np.\n");
 484                 return ERR_PTR(-ENOMEM);
 485         }
 486
 487         np = iscsit_add_np(sockaddr, ip_str, network_transport);
 488         if (IS_ERR(np)) {
 489                 kfree(tpg_np);
 490                 return ERR_CAST(np);
 491         }
 492
 493         INIT_LIST_HEAD(&tpg_np->tpg_np_list);
 494         INIT_LIST_HEAD(&tpg_np->tpg_np_child_list);
 495         INIT_LIST_HEAD(&tpg_np->tpg_np_parent_list);
 496         spin_lock_init(&tpg_np->tpg_np_parent_lock);
 497         tpg_np->tpg_np          = np;
 498         tpg_np->tpg             = tpg;
 499
 500         spin_lock(&tpg->tpg_np_lock);
 501         list_add_tail(&tpg_np->tpg_np_list, &tpg->tpg_gnp_list);
 502         tpg->num_tpg_nps++;
 503         if (tpg->tpg_tiqn)
 504                 tpg->tpg_tiqn->tiqn_num_tpg_nps++;
 505         spin_unlock(&tpg->tpg_np_lock);
 506
 507         if (tpg_np_parent) {
 508                 tpg_np->tpg_np_parent = tpg_np_parent;
 509                 spin_lock(&tpg_np_parent->tpg_np_parent_lock);
 510                 list_add_tail(&tpg_np->tpg_np_child_list,
 511                         &tpg_np_parent->tpg_np_parent_list);
 512                 spin_unlock(&tpg_np_parent->tpg_np_parent_lock);
 513         }
 514
 515         pr_debug("CORE[%s] - Added Network Portal: %s:%hu,%hu on %s\n",
 516                 tpg->tpg_tiqn->tiqn, np->np_ip, np->np_port, tpg->tpgt,
 517                 np->np_transport->name);
 518
 519         return tpg_np;
 520 }
 521
 522 static int iscsit_tpg_release_np(
 523         struct iscsi_tpg_np *tpg_np,
 524         struct iscsi_portal_group *tpg,
 525         struct iscsi_np *np)
 526 {
 527         iscsit_clear_tpg_np_login_thread(tpg_np, tpg, true);
 528
 529         pr_debug("CORE[%s] - Removed Network Portal: %s:%hu,%hu on %s\n",
 530                 tpg->tpg_tiqn->tiqn, np->np_ip, np->np_port, tpg->tpgt,
 531                 np->np_transport->name);
 532
 533         tpg_np->tpg_np = NULL;
 534         tpg_np->tpg = NULL;
 535         kfree(tpg_np);
 536         /*
 537          * iscsit_del_np() will shutdown struct iscsi_np when last TPG reference is released.
 538          */
 539         return iscsit_del_np(np);
 540 }
 541
 542 int iscsit_tpg_del_network_portal(
 543         struct iscsi_portal_group *tpg,
 544         struct iscsi_tpg_np *tpg_np)
 545 {
 546         struct iscsi_np *np;
 547         struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
 548         int ret = 0;
 549
 550         np = tpg_np->tpg_np;
 551         if (!np) {
 552                 pr_err("Unable to locate struct iscsi_np from"
 553                                 " struct iscsi_tpg_np\n");
 554                 return -EINVAL;
 555         }
 556
 557         if (!tpg_np->tpg_np_parent) {
 558                 /*
 559                  * We are the parent tpg network portal.  Release all of the
 560                  * child tpg_np's (eg: the non ISCSI_TCP ones) on our parent
 561                  * list first.
 562                  */
 563                 list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
 564                                 &tpg_np->tpg_np_parent_list,
 565                                 tpg_np_child_list) {
 566                         ret = iscsit_tpg_del_network_portal(tpg, tpg_np_child);
 567                         if (ret < 0)
 568                                 pr_err("iscsit_tpg_del_network_portal()"
 569                                         " failed: %d\n", ret);
 570                 }
 571         } else {
 572                 /*
 573                  * We are not the parent ISCSI_TCP tpg network portal.  Release
 574                  * our own network portals from the child list.
 575                  */
 576                 spin_lock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
 577                 list_del(&tpg_np->tpg_np_child_list);
 578                 spin_unlock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
 579         }
 580
 581         spin_lock(&tpg->tpg_np_lock);
 582         list_del(&tpg_np->tpg_np_list);
 583         tpg->num_tpg_nps--;
 584         if (tpg->tpg_tiqn)
 585                 tpg->tpg_tiqn->tiqn_num_tpg_nps--;
 586         spin_unlock(&tpg->tpg_np_lock);
 587
 588         return iscsit_tpg_release_np(tpg_np, tpg, np);
 589 }
 590
 591 int iscsit_tpg_set_initiator_node_queue_depth(
 592         struct iscsi_portal_group *tpg,
 593         unsigned char *initiatorname,
 594         u32 queue_depth,
 595         int force)
 596 {
 597         return core_tpg_set_initiator_node_queue_depth(&tpg->tpg_se_tpg,
 598                 initiatorname, queue_depth, force);
 599 }
 600
 601 int iscsit_ta_authentication(struct iscsi_portal_group *tpg, u32 authentication)
 602 {
 603         unsigned char buf1[256], buf2[256], *none = NULL;
 604         int len;
 605         struct iscsi_param *param;
 606         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 607
 608         if ((authentication != 1) && (authentication != 0)) {
 609                 pr_err("Illegal value for authentication parameter:"
 610                         " %u, ignoring request.\n", authentication);
 611                 return -EINVAL;
 612         }
 613
 614         memset(buf1, 0, sizeof(buf1));
 615         memset(buf2, 0, sizeof(buf2));
 616
 617         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
 618         if (!param)
 619                 return -EINVAL;
 620
 621         if (authentication) {
 622                 snprintf(buf1, sizeof(buf1), "%s", param->value);
 623                 none = strstr(buf1, NONE);
 624                 if (!none)
 625                         goto out;
 626                 if (!strncmp(none + 4, ",", 1)) {
 627                         if (!strcmp(buf1, none))
 628                                 sprintf(buf2, "%s", none+5);
 629                         else {
 630                                 none--;
 631                                 *none = '\0';
 632                                 len = sprintf(buf2, "%s", buf1);
 633                                 none += 5;
 634                                 sprintf(buf2 + len, "%s", none);
 635                         }
 636                 } else {
 637                         none--;
 638                         *none = '\0';
 639                         sprintf(buf2, "%s", buf1);
 640                 }
 641                 if (iscsi_update_param_value(param, buf2) < 0)
 642                         return -EINVAL;
 643         } else {
 644                 snprintf(buf1, sizeof(buf1), "%s", param->value);
 645                 none = strstr(buf1, NONE);
 646                 if (none)
 647                         goto out;
 648                 strncat(buf1, ",", strlen(","));
 649                 strncat(buf1, NONE, strlen(NONE));
 650                 if (iscsi_update_param_value(param, buf1) < 0)
 651                         return -EINVAL;
 652         }
 653
 654 out:
 655         a->authentication = authentication;
 656         pr_debug("%s iSCSI Authentication Methods for TPG: %hu.\n",
 657                 a->authentication ? "Enforcing" : "Disabling", tpg->tpgt);
 658
 659         return 0;
 660 }
 661
 662 int iscsit_ta_login_timeout(
 663         struct iscsi_portal_group *tpg,
 664         u32 login_timeout)
 665 {
 666         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 667
 668         if (login_timeout > TA_LOGIN_TIMEOUT_MAX) {
 669                 pr_err("Requested Login Timeout %u larger than maximum"
 670                         " %u\n", login_timeout, TA_LOGIN_TIMEOUT_MAX);
 671                 return -EINVAL;
 672         } else if (login_timeout < TA_LOGIN_TIMEOUT_MIN) {
 673                 pr_err("Requested Logout Timeout %u smaller than"
 674                         " minimum %u\n", login_timeout, TA_LOGIN_TIMEOUT_MIN);
 675                 return -EINVAL;
 676         }
 677
 678         a->login_timeout = login_timeout;
 679         pr_debug("Set Logout Timeout to %u for Target Portal Group"
 680                 " %hu\n", a->login_timeout, tpg->tpgt);
 681
 682         return 0;
 683 }
 684
 685 int iscsit_ta_netif_timeout(
 686         struct iscsi_portal_group *tpg,
 687         u32 netif_timeout)
 688 {
 689         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 690
 691         if (netif_timeout > TA_NETIF_TIMEOUT_MAX) {
 692                 pr_err("Requested Network Interface Timeout %u larger"
 693                         " than maximum %u\n", netif_timeout,
 694                                 TA_NETIF_TIMEOUT_MAX);
 695                 return -EINVAL;
 696         } else if (netif_timeout < TA_NETIF_TIMEOUT_MIN) {
 697                 pr_err("Requested Network Interface Timeout %u smaller"
 698                         " than minimum %u\n", netif_timeout,
 699                                 TA_NETIF_TIMEOUT_MIN);
 700                 return -EINVAL;
 701         }
 702
 703         a->netif_timeout = netif_timeout;
 704         pr_debug("Set Network Interface Timeout to %u for"
 705                 " Target Portal Group %hu\n", a->netif_timeout, tpg->tpgt);
 706
 707         return 0;
 708 }
 709
 710 int iscsit_ta_generate_node_acls(
 711         struct iscsi_portal_group *tpg,
 712         u32 flag)
 713 {
 714         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 715
 716         if ((flag != 0) && (flag != 1)) {
 717                 pr_err("Illegal value %d\n", flag);
 718                 return -EINVAL;
 719         }
 720
 721         a->generate_node_acls = flag;
 722         pr_debug("iSCSI_TPG[%hu] - Generate Initiator Portal Group ACLs: %s\n",
 723                 tpg->tpgt, (a->generate_node_acls) ? "Enabled" : "Disabled");
 724
 725         if (flag == 1 && a->cache_dynamic_acls == 0) {
 726                 pr_debug("Explicitly setting cache_dynamic_acls=1 when "
 727                         "generate_node_acls=1\n");
 728                 a->cache_dynamic_acls = 1;
 729         }
 730
 731         return 0;
 732 }
 733
 734 int iscsit_ta_default_cmdsn_depth(
 735         struct iscsi_portal_group *tpg,
 736         u32 tcq_depth)
 737 {
 738         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 739
 740         if (tcq_depth > TA_DEFAULT_CMDSN_DEPTH_MAX) {
 741                 pr_err("Requested Default Queue Depth: %u larger"
 742                         " than maximum %u\n", tcq_depth,
 743                                 TA_DEFAULT_CMDSN_DEPTH_MAX);
 744                 return -EINVAL;
 745         } else if (tcq_depth < TA_DEFAULT_CMDSN_DEPTH_MIN) {
 746                 pr_err("Requested Default Queue Depth: %u smaller"
 747                         " than minimum %u\n", tcq_depth,
 748                                 TA_DEFAULT_CMDSN_DEPTH_MIN);
 749                 return -EINVAL;
 750         }
 751
 752         a->default_cmdsn_depth = tcq_depth;
 753         pr_debug("iSCSI_TPG[%hu] - Set Default CmdSN TCQ Depth to %u\n",
 754                 tpg->tpgt, a->default_cmdsn_depth);
 755
 756         return 0;
 757 }
 758
 759 int iscsit_ta_cache_dynamic_acls(
 760         struct iscsi_portal_group *tpg,
 761         u32 flag)
 762 {
 763         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 764
 765         if ((flag != 0) && (flag != 1)) {
 766                 pr_err("Illegal value %d\n", flag);
 767                 return -EINVAL;
 768         }
 769
 770         if (a->generate_node_acls == 1 && flag == 0) {
 771                 pr_debug("Skipping cache_dynamic_acls=0 when"
 772                         " generate_node_acls=1\n");
 773                 return 0;
 774         }
 775
 776         a->cache_dynamic_acls = flag;
 777         pr_debug("iSCSI_TPG[%hu] - Cache Dynamic Initiator Portal Group"
 778                 " ACLs %s\n", tpg->tpgt, (a->cache_dynamic_acls) ?
 779                 "Enabled" : "Disabled");
 780
 781         return 0;
 782 }
 783
 784 int iscsit_ta_demo_mode_write_protect(
 785         struct iscsi_portal_group *tpg,
 786         u32 flag)
 787 {
 788         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 789
 790         if ((flag != 0) && (flag != 1)) {
 791                 pr_err("Illegal value %d\n", flag);
 792                 return -EINVAL;
 793         }
 794
 795         a->demo_mode_write_protect = flag;
 796         pr_debug("iSCSI_TPG[%hu] - Demo Mode Write Protect bit: %s\n",
 797                 tpg->tpgt, (a->demo_mode_write_protect) ? "ON" : "OFF");
 798
 799         return 0;
 800 }
 801
 802 int iscsit_ta_prod_mode_write_protect(
 803         struct iscsi_portal_group *tpg,
 804         u32 flag)
 805 {
 806         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 807
 808         if ((flag != 0) && (flag != 1)) {
 809                 pr_err("Illegal value %d\n", flag);
 810                 return -EINVAL;
 811         }
 812
 813         a->prod_mode_write_protect = flag;
 814         pr_debug("iSCSI_TPG[%hu] - Production Mode Write Protect bit:"
 815                 " %s\n", tpg->tpgt, (a->prod_mode_write_protect) ?
 816                 "ON" : "OFF");
 817
 818         return 0;
 819 }