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 #include <target/target_core_configfs.h>
  22
  23 #include "iscsi_target_core.h"
  24 #include "iscsi_target_erl0.h"
  25 #include "iscsi_target_login.h"
  26 #include "iscsi_target_nodeattrib.h"
  27 #include "iscsi_target_tpg.h"
  28 #include "iscsi_target_util.h"
  29 #include "iscsi_target.h"
  30 #include "iscsi_target_parameters.h"
  31
  32 #include <target/iscsi/iscsi_transport.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         sema_init(&tpg->np_login_sem, 1);
  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         struct iscsi_tpg_np **tpg_np_out)
 132 {
 133         struct iscsi_portal_group *tpg = NULL;
 134         struct iscsi_tpg_np *tpg_np;
 135
 136         spin_lock(&tiqn->tiqn_tpg_lock);
 137         list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) {
 138
 139                 spin_lock(&tpg->tpg_state_lock);
 140                 if (tpg->tpg_state != TPG_STATE_ACTIVE) {
 141                         spin_unlock(&tpg->tpg_state_lock);
 142                         continue;
 143                 }
 144                 spin_unlock(&tpg->tpg_state_lock);
 145
 146                 spin_lock(&tpg->tpg_np_lock);
 147                 list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
 148                         if (tpg_np->tpg_np == np) {
 149                                 *tpg_np_out = tpg_np;
 150                                 kref_get(&tpg_np->tpg_np_kref);
 151                                 spin_unlock(&tpg->tpg_np_lock);
 152                                 spin_unlock(&tiqn->tiqn_tpg_lock);
 153                                 return tpg;
 154                         }
 155                 }
 156                 spin_unlock(&tpg->tpg_np_lock);
 157         }
 158         spin_unlock(&tiqn->tiqn_tpg_lock);
 159
 160         return NULL;
 161 }
 162
 163 int iscsit_get_tpg(
 164         struct iscsi_portal_group *tpg)
 165 {
 166         int ret;
 167
 168         ret = mutex_lock_interruptible(&tpg->tpg_access_lock);
 169         return ((ret != 0) || signal_pending(current)) ? -1 : 0;
 170 }
 171
 172 void iscsit_put_tpg(struct iscsi_portal_group *tpg)
 173 {
 174         mutex_unlock(&tpg->tpg_access_lock);
 175 }
 176
 177 static void iscsit_clear_tpg_np_login_thread(
 178         struct iscsi_tpg_np *tpg_np,
 179         struct iscsi_portal_group *tpg,
 180         bool shutdown)
 181 {
 182         if (!tpg_np->tpg_np) {
 183                 pr_err("struct iscsi_tpg_np->tpg_np is NULL!\n");
 184                 return;
 185         }
 186
 187         tpg_np->tpg_np->enabled = false;
 188         iscsit_reset_np_thread(tpg_np->tpg_np, tpg_np, tpg, shutdown);
 189 }
 190
 191 void iscsit_clear_tpg_np_login_threads(
 192         struct iscsi_portal_group *tpg,
 193         bool shutdown)
 194 {
 195         struct iscsi_tpg_np *tpg_np;
 196
 197         spin_lock(&tpg->tpg_np_lock);
 198         list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
 199                 if (!tpg_np->tpg_np) {
 200                         pr_err("struct iscsi_tpg_np->tpg_np is NULL!\n");
 201                         continue;
 202                 }
 203                 spin_unlock(&tpg->tpg_np_lock);
 204                 iscsit_clear_tpg_np_login_thread(tpg_np, tpg, shutdown);
 205                 spin_lock(&tpg->tpg_np_lock);
 206         }
 207         spin_unlock(&tpg->tpg_np_lock);
 208 }
 209
 210 void iscsit_tpg_dump_params(struct iscsi_portal_group *tpg)
 211 {
 212         iscsi_print_params(tpg->param_list);
 213 }
 214
 215 static void iscsit_set_default_tpg_attribs(struct iscsi_portal_group *tpg)
 216 {
 217         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 218
 219         a->authentication = TA_AUTHENTICATION;
 220         a->login_timeout = TA_LOGIN_TIMEOUT;
 221         a->netif_timeout = TA_NETIF_TIMEOUT;
 222         a->default_cmdsn_depth = TA_DEFAULT_CMDSN_DEPTH;
 223         a->generate_node_acls = TA_GENERATE_NODE_ACLS;
 224         a->cache_dynamic_acls = TA_CACHE_DYNAMIC_ACLS;
 225         a->demo_mode_write_protect = TA_DEMO_MODE_WRITE_PROTECT;
 226         a->prod_mode_write_protect = TA_PROD_MODE_WRITE_PROTECT;
 227         a->demo_mode_discovery = TA_DEMO_MODE_DISCOVERY;
 228         a->default_erl = TA_DEFAULT_ERL;
 229         a->t10_pi = TA_DEFAULT_T10_PI;
 230 }
 231
 232 int iscsit_tpg_add_portal_group(struct iscsi_tiqn *tiqn, struct iscsi_portal_group *tpg)
 233 {
 234         if (tpg->tpg_state != TPG_STATE_FREE) {
 235                 pr_err("Unable to add iSCSI Target Portal Group: %d"
 236                         " while not in TPG_STATE_FREE state.\n", tpg->tpgt);
 237                 return -EEXIST;
 238         }
 239         iscsit_set_default_tpg_attribs(tpg);
 240
 241         if (iscsi_create_default_params(&tpg->param_list) < 0)
 242                 goto err_out;
 243
 244         tpg->tpg_attrib.tpg = tpg;
 245
 246         spin_lock(&tpg->tpg_state_lock);
 247         tpg->tpg_state  = TPG_STATE_INACTIVE;
 248         spin_unlock(&tpg->tpg_state_lock);
 249
 250         spin_lock(&tiqn->tiqn_tpg_lock);
 251         list_add_tail(&tpg->tpg_list, &tiqn->tiqn_tpg_list);
 252         tiqn->tiqn_ntpgs++;
 253         pr_debug("CORE[%s]_TPG[%hu] - Added iSCSI Target Portal Group\n",
 254                         tiqn->tiqn, tpg->tpgt);
 255         spin_unlock(&tiqn->tiqn_tpg_lock);
 256
 257         return 0;
 258 err_out:
 259         if (tpg->param_list) {
 260                 iscsi_release_param_list(tpg->param_list);
 261                 tpg->param_list = NULL;
 262         }
 263         kfree(tpg);
 264         return -ENOMEM;
 265 }
 266
 267 int iscsit_tpg_del_portal_group(
 268         struct iscsi_tiqn *tiqn,
 269         struct iscsi_portal_group *tpg,
 270         int force)
 271 {
 272         u8 old_state = tpg->tpg_state;
 273
 274         spin_lock(&tpg->tpg_state_lock);
 275         tpg->tpg_state = TPG_STATE_INACTIVE;
 276         spin_unlock(&tpg->tpg_state_lock);
 277
 278         iscsit_clear_tpg_np_login_threads(tpg, true);
 279
 280         if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
 281                 pr_err("Unable to delete iSCSI Target Portal Group:"
 282                         " %hu while active sessions exist, and force=0\n",
 283                         tpg->tpgt);
 284                 tpg->tpg_state = old_state;
 285                 return -EPERM;
 286         }
 287
 288         core_tpg_clear_object_luns(&tpg->tpg_se_tpg);
 289
 290         if (tpg->param_list) {
 291                 iscsi_release_param_list(tpg->param_list);
 292                 tpg->param_list = NULL;
 293         }
 294
 295         core_tpg_deregister(&tpg->tpg_se_tpg);
 296
 297         spin_lock(&tpg->tpg_state_lock);
 298         tpg->tpg_state = TPG_STATE_FREE;
 299         spin_unlock(&tpg->tpg_state_lock);
 300
 301         spin_lock(&tiqn->tiqn_tpg_lock);
 302         tiqn->tiqn_ntpgs--;
 303         list_del(&tpg->tpg_list);
 304         spin_unlock(&tiqn->tiqn_tpg_lock);
 305
 306         pr_debug("CORE[%s]_TPG[%hu] - Deleted iSCSI Target Portal Group\n",
 307                         tiqn->tiqn, tpg->tpgt);
 308
 309         kfree(tpg);
 310         return 0;
 311 }
 312
 313 int iscsit_tpg_enable_portal_group(struct iscsi_portal_group *tpg)
 314 {
 315         struct iscsi_param *param;
 316         struct iscsi_tiqn *tiqn = tpg->tpg_tiqn;
 317         int ret;
 318
 319         spin_lock(&tpg->tpg_state_lock);
 320         if (tpg->tpg_state == TPG_STATE_ACTIVE) {
 321                 pr_err("iSCSI target portal group: %hu is already"
 322                         " active, ignoring request.\n", tpg->tpgt);
 323                 spin_unlock(&tpg->tpg_state_lock);
 324                 return -EINVAL;
 325         }
 326         /*
 327          * Make sure that AuthMethod does not contain None as an option
 328          * unless explictly disabled.  Set the default to CHAP if authentication
 329          * is enforced (as per default), and remove the NONE option.
 330          */
 331         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
 332         if (!param) {
 333                 spin_unlock(&tpg->tpg_state_lock);
 334                 return -EINVAL;
 335         }
 336
 337         if (tpg->tpg_attrib.authentication) {
 338                 if (!strcmp(param->value, NONE)) {
 339                         ret = iscsi_update_param_value(param, CHAP);
 340                         if (ret)
 341                                 goto err;
 342                 }
 343
 344                 ret = iscsit_ta_authentication(tpg, 1);
 345                 if (ret < 0)
 346                         goto err;
 347         }
 348
 349         tpg->tpg_state = TPG_STATE_ACTIVE;
 350         spin_unlock(&tpg->tpg_state_lock);
 351
 352         spin_lock(&tiqn->tiqn_tpg_lock);
 353         tiqn->tiqn_active_tpgs++;
 354         pr_debug("iSCSI_TPG[%hu] - Enabled iSCSI Target Portal Group\n",
 355                         tpg->tpgt);
 356         spin_unlock(&tiqn->tiqn_tpg_lock);
 357
 358         return 0;
 359
 360 err:
 361         spin_unlock(&tpg->tpg_state_lock);
 362         return ret;
 363 }
 364
 365 int iscsit_tpg_disable_portal_group(struct iscsi_portal_group *tpg, int force)
 366 {
 367         struct iscsi_tiqn *tiqn;
 368         u8 old_state = tpg->tpg_state;
 369
 370         spin_lock(&tpg->tpg_state_lock);
 371         if (tpg->tpg_state == TPG_STATE_INACTIVE) {
 372                 pr_err("iSCSI Target Portal Group: %hu is already"
 373                         " inactive, ignoring request.\n", tpg->tpgt);
 374                 spin_unlock(&tpg->tpg_state_lock);
 375                 return -EINVAL;
 376         }
 377         tpg->tpg_state = TPG_STATE_INACTIVE;
 378         spin_unlock(&tpg->tpg_state_lock);
 379
 380         iscsit_clear_tpg_np_login_threads(tpg, false);
 381
 382         if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
 383                 spin_lock(&tpg->tpg_state_lock);
 384                 tpg->tpg_state = old_state;
 385                 spin_unlock(&tpg->tpg_state_lock);
 386                 pr_err("Unable to disable iSCSI Target Portal Group:"
 387                         " %hu while active sessions exist, and force=0\n",
 388                         tpg->tpgt);
 389                 return -EPERM;
 390         }
 391
 392         tiqn = tpg->tpg_tiqn;
 393         if (!tiqn || (tpg == iscsit_global->discovery_tpg))
 394                 return 0;
 395
 396         spin_lock(&tiqn->tiqn_tpg_lock);
 397         tiqn->tiqn_active_tpgs--;
 398         pr_debug("iSCSI_TPG[%hu] - Disabled iSCSI Target Portal Group\n",
 399                         tpg->tpgt);
 400         spin_unlock(&tiqn->tiqn_tpg_lock);
 401
 402         return 0;
 403 }
 404
 405 struct iscsi_node_attrib *iscsit_tpg_get_node_attrib(
 406         struct iscsi_session *sess)
 407 {
 408         struct se_session *se_sess = sess->se_sess;
 409         struct se_node_acl *se_nacl = se_sess->se_node_acl;
 410         struct iscsi_node_acl *acl = container_of(se_nacl, struct iscsi_node_acl,
 411                                         se_node_acl);
 412
 413         return &acl->node_attrib;
 414 }
 415
 416 struct iscsi_tpg_np *iscsit_tpg_locate_child_np(
 417         struct iscsi_tpg_np *tpg_np,
 418         int network_transport)
 419 {
 420         struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
 421
 422         spin_lock(&tpg_np->tpg_np_parent_lock);
 423         list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
 424                         &tpg_np->tpg_np_parent_list, tpg_np_child_list) {
 425                 if (tpg_np_child->tpg_np->np_network_transport ==
 426                                 network_transport) {
 427                         spin_unlock(&tpg_np->tpg_np_parent_lock);
 428                         return tpg_np_child;
 429                 }
 430         }
 431         spin_unlock(&tpg_np->tpg_np_parent_lock);
 432
 433         return NULL;
 434 }
 435
 436 static bool iscsit_tpg_check_network_portal(
 437         struct iscsi_tiqn *tiqn,
 438         struct __kernel_sockaddr_storage *sockaddr,
 439         int network_transport)
 440 {
 441         struct iscsi_portal_group *tpg;
 442         struct iscsi_tpg_np *tpg_np;
 443         struct iscsi_np *np;
 444         bool match = false;
 445
 446         spin_lock(&tiqn->tiqn_tpg_lock);
 447         list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) {
 448
 449                 spin_lock(&tpg->tpg_np_lock);
 450                 list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
 451                         np = tpg_np->tpg_np;
 452
 453                         match = iscsit_check_np_match(sockaddr, np,
 454                                                 network_transport);
 455                         if (match == true)
 456                                 break;
 457                 }
 458                 spin_unlock(&tpg->tpg_np_lock);
 459         }
 460         spin_unlock(&tiqn->tiqn_tpg_lock);
 461
 462         return match;
 463 }
 464
 465 struct iscsi_tpg_np *iscsit_tpg_add_network_portal(
 466         struct iscsi_portal_group *tpg,
 467         struct __kernel_sockaddr_storage *sockaddr,
 468         char *ip_str,
 469         struct iscsi_tpg_np *tpg_np_parent,
 470         int network_transport)
 471 {
 472         struct iscsi_np *np;
 473         struct iscsi_tpg_np *tpg_np;
 474
 475         if (!tpg_np_parent) {
 476                 if (iscsit_tpg_check_network_portal(tpg->tpg_tiqn, sockaddr,
 477                                 network_transport) == true) {
 478                         pr_err("Network Portal: %s already exists on a"
 479                                 " different TPG on %s\n", ip_str,
 480                                 tpg->tpg_tiqn->tiqn);
 481                         return ERR_PTR(-EEXIST);
 482                 }
 483         }
 484
 485         tpg_np = kzalloc(sizeof(struct iscsi_tpg_np), GFP_KERNEL);
 486         if (!tpg_np) {
 487                 pr_err("Unable to allocate memory for"
 488                                 " struct iscsi_tpg_np.\n");
 489                 return ERR_PTR(-ENOMEM);
 490         }
 491
 492         np = iscsit_add_np(sockaddr, ip_str, network_transport);
 493         if (IS_ERR(np)) {
 494                 kfree(tpg_np);
 495                 return ERR_CAST(np);
 496         }
 497
 498         INIT_LIST_HEAD(&tpg_np->tpg_np_list);
 499         INIT_LIST_HEAD(&tpg_np->tpg_np_child_list);
 500         INIT_LIST_HEAD(&tpg_np->tpg_np_parent_list);
 501         spin_lock_init(&tpg_np->tpg_np_parent_lock);
 502         init_completion(&tpg_np->tpg_np_comp);
 503         kref_init(&tpg_np->tpg_np_kref);
 504         tpg_np->tpg_np          = np;
 505         np->tpg_np              = tpg_np;
 506         tpg_np->tpg             = tpg;
 507
 508         spin_lock(&tpg->tpg_np_lock);
 509         list_add_tail(&tpg_np->tpg_np_list, &tpg->tpg_gnp_list);
 510         tpg->num_tpg_nps++;
 511         if (tpg->tpg_tiqn)
 512                 tpg->tpg_tiqn->tiqn_num_tpg_nps++;
 513         spin_unlock(&tpg->tpg_np_lock);
 514
 515         if (tpg_np_parent) {
 516                 tpg_np->tpg_np_parent = tpg_np_parent;
 517                 spin_lock(&tpg_np_parent->tpg_np_parent_lock);
 518                 list_add_tail(&tpg_np->tpg_np_child_list,
 519                         &tpg_np_parent->tpg_np_parent_list);
 520                 spin_unlock(&tpg_np_parent->tpg_np_parent_lock);
 521         }
 522
 523         pr_debug("CORE[%s] - Added Network Portal: %s:%hu,%hu on %s\n",
 524                 tpg->tpg_tiqn->tiqn, np->np_ip, np->np_port, tpg->tpgt,
 525                 np->np_transport->name);
 526
 527         return tpg_np;
 528 }
 529
 530 static int iscsit_tpg_release_np(
 531         struct iscsi_tpg_np *tpg_np,
 532         struct iscsi_portal_group *tpg,
 533         struct iscsi_np *np)
 534 {
 535         iscsit_clear_tpg_np_login_thread(tpg_np, tpg, true);
 536
 537         pr_debug("CORE[%s] - Removed Network Portal: %s:%hu,%hu on %s\n",
 538                 tpg->tpg_tiqn->tiqn, np->np_ip, np->np_port, tpg->tpgt,
 539                 np->np_transport->name);
 540
 541         tpg_np->tpg_np = NULL;
 542         tpg_np->tpg = NULL;
 543         kfree(tpg_np);
 544         /*
 545          * iscsit_del_np() will shutdown struct iscsi_np when last TPG reference is released.
 546          */
 547         return iscsit_del_np(np);
 548 }
 549
 550 int iscsit_tpg_del_network_portal(
 551         struct iscsi_portal_group *tpg,
 552         struct iscsi_tpg_np *tpg_np)
 553 {
 554         struct iscsi_np *np;
 555         struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
 556         int ret = 0;
 557
 558         np = tpg_np->tpg_np;
 559         if (!np) {
 560                 pr_err("Unable to locate struct iscsi_np from"
 561                                 " struct iscsi_tpg_np\n");
 562                 return -EINVAL;
 563         }
 564
 565         if (!tpg_np->tpg_np_parent) {
 566                 /*
 567                  * We are the parent tpg network portal.  Release all of the
 568                  * child tpg_np's (eg: the non ISCSI_TCP ones) on our parent
 569                  * list first.
 570                  */
 571                 list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
 572                                 &tpg_np->tpg_np_parent_list,
 573                                 tpg_np_child_list) {
 574                         ret = iscsit_tpg_del_network_portal(tpg, tpg_np_child);
 575                         if (ret < 0)
 576                                 pr_err("iscsit_tpg_del_network_portal()"
 577                                         " failed: %d\n", ret);
 578                 }
 579         } else {
 580                 /*
 581                  * We are not the parent ISCSI_TCP tpg network portal.  Release
 582                  * our own network portals from the child list.
 583                  */
 584                 spin_lock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
 585                 list_del(&tpg_np->tpg_np_child_list);
 586                 spin_unlock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
 587         }
 588
 589         spin_lock(&tpg->tpg_np_lock);
 590         list_del(&tpg_np->tpg_np_list);
 591         tpg->num_tpg_nps--;
 592         if (tpg->tpg_tiqn)
 593                 tpg->tpg_tiqn->tiqn_num_tpg_nps--;
 594         spin_unlock(&tpg->tpg_np_lock);
 595
 596         return iscsit_tpg_release_np(tpg_np, tpg, np);
 597 }
 598
 599 int iscsit_tpg_set_initiator_node_queue_depth(
 600         struct iscsi_portal_group *tpg,
 601         unsigned char *initiatorname,
 602         u32 queue_depth,
 603         int force)
 604 {
 605         return core_tpg_set_initiator_node_queue_depth(&tpg->tpg_se_tpg,
 606                 initiatorname, queue_depth, force);
 607 }
 608
 609 int iscsit_ta_authentication(struct iscsi_portal_group *tpg, u32 authentication)
 610 {
 611         unsigned char buf1[256], buf2[256], *none = NULL;
 612         int len;
 613         struct iscsi_param *param;
 614         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 615
 616         if ((authentication != 1) && (authentication != 0)) {
 617                 pr_err("Illegal value for authentication parameter:"
 618                         " %u, ignoring request.\n", authentication);
 619                 return -EINVAL;
 620         }
 621
 622         memset(buf1, 0, sizeof(buf1));
 623         memset(buf2, 0, sizeof(buf2));
 624
 625         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
 626         if (!param)
 627                 return -EINVAL;
 628
 629         if (authentication) {
 630                 snprintf(buf1, sizeof(buf1), "%s", param->value);
 631                 none = strstr(buf1, NONE);
 632                 if (!none)
 633                         goto out;
 634                 if (!strncmp(none + 4, ",", 1)) {
 635                         if (!strcmp(buf1, none))
 636                                 sprintf(buf2, "%s", none+5);
 637                         else {
 638                                 none--;
 639                                 *none = '\0';
 640                                 len = sprintf(buf2, "%s", buf1);
 641                                 none += 5;
 642                                 sprintf(buf2 + len, "%s", none);
 643                         }
 644                 } else {
 645                         none--;
 646                         *none = '\0';
 647                         sprintf(buf2, "%s", buf1);
 648                 }
 649                 if (iscsi_update_param_value(param, buf2) < 0)
 650                         return -EINVAL;
 651         } else {
 652                 snprintf(buf1, sizeof(buf1), "%s", param->value);
 653                 none = strstr(buf1, NONE);
 654                 if (none)
 655                         goto out;
 656                 strncat(buf1, ",", strlen(","));
 657                 strncat(buf1, NONE, strlen(NONE));
 658                 if (iscsi_update_param_value(param, buf1) < 0)
 659                         return -EINVAL;
 660         }
 661
 662 out:
 663         a->authentication = authentication;
 664         pr_debug("%s iSCSI Authentication Methods for TPG: %hu.\n",
 665                 a->authentication ? "Enforcing" : "Disabling", tpg->tpgt);
 666
 667         return 0;
 668 }
 669
 670 int iscsit_ta_login_timeout(
 671         struct iscsi_portal_group *tpg,
 672         u32 login_timeout)
 673 {
 674         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 675
 676         if (login_timeout > TA_LOGIN_TIMEOUT_MAX) {
 677                 pr_err("Requested Login Timeout %u larger than maximum"
 678                         " %u\n", login_timeout, TA_LOGIN_TIMEOUT_MAX);
 679                 return -EINVAL;
 680         } else if (login_timeout < TA_LOGIN_TIMEOUT_MIN) {
 681                 pr_err("Requested Logout Timeout %u smaller than"
 682                         " minimum %u\n", login_timeout, TA_LOGIN_TIMEOUT_MIN);
 683                 return -EINVAL;
 684         }
 685
 686         a->login_timeout = login_timeout;
 687         pr_debug("Set Logout Timeout to %u for Target Portal Group"
 688                 " %hu\n", a->login_timeout, tpg->tpgt);
 689
 690         return 0;
 691 }
 692
 693 int iscsit_ta_netif_timeout(
 694         struct iscsi_portal_group *tpg,
 695         u32 netif_timeout)
 696 {
 697         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 698
 699         if (netif_timeout > TA_NETIF_TIMEOUT_MAX) {
 700                 pr_err("Requested Network Interface Timeout %u larger"
 701                         " than maximum %u\n", netif_timeout,
 702                                 TA_NETIF_TIMEOUT_MAX);
 703                 return -EINVAL;
 704         } else if (netif_timeout < TA_NETIF_TIMEOUT_MIN) {
 705                 pr_err("Requested Network Interface Timeout %u smaller"
 706                         " than minimum %u\n", netif_timeout,
 707                                 TA_NETIF_TIMEOUT_MIN);
 708                 return -EINVAL;
 709         }
 710
 711         a->netif_timeout = netif_timeout;
 712         pr_debug("Set Network Interface Timeout to %u for"
 713                 " Target Portal Group %hu\n", a->netif_timeout, tpg->tpgt);
 714
 715         return 0;
 716 }
 717
 718 int iscsit_ta_generate_node_acls(
 719         struct iscsi_portal_group *tpg,
 720         u32 flag)
 721 {
 722         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 723
 724         if ((flag != 0) && (flag != 1)) {
 725                 pr_err("Illegal value %d\n", flag);
 726                 return -EINVAL;
 727         }
 728
 729         a->generate_node_acls = flag;
 730         pr_debug("iSCSI_TPG[%hu] - Generate Initiator Portal Group ACLs: %s\n",
 731                 tpg->tpgt, (a->generate_node_acls) ? "Enabled" : "Disabled");
 732
 733         if (flag == 1 && a->cache_dynamic_acls == 0) {
 734                 pr_debug("Explicitly setting cache_dynamic_acls=1 when "
 735                         "generate_node_acls=1\n");
 736                 a->cache_dynamic_acls = 1;
 737         }
 738
 739         return 0;
 740 }
 741
 742 int iscsit_ta_default_cmdsn_depth(
 743         struct iscsi_portal_group *tpg,
 744         u32 tcq_depth)
 745 {
 746         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 747
 748         if (tcq_depth > TA_DEFAULT_CMDSN_DEPTH_MAX) {
 749                 pr_err("Requested Default Queue Depth: %u larger"
 750                         " than maximum %u\n", tcq_depth,
 751                                 TA_DEFAULT_CMDSN_DEPTH_MAX);
 752                 return -EINVAL;
 753         } else if (tcq_depth < TA_DEFAULT_CMDSN_DEPTH_MIN) {
 754                 pr_err("Requested Default Queue Depth: %u smaller"
 755                         " than minimum %u\n", tcq_depth,
 756                                 TA_DEFAULT_CMDSN_DEPTH_MIN);
 757                 return -EINVAL;
 758         }
 759
 760         a->default_cmdsn_depth = tcq_depth;
 761         pr_debug("iSCSI_TPG[%hu] - Set Default CmdSN TCQ Depth to %u\n",
 762                 tpg->tpgt, a->default_cmdsn_depth);
 763
 764         return 0;
 765 }
 766
 767 int iscsit_ta_cache_dynamic_acls(
 768         struct iscsi_portal_group *tpg,
 769         u32 flag)
 770 {
 771         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 772
 773         if ((flag != 0) && (flag != 1)) {
 774                 pr_err("Illegal value %d\n", flag);
 775                 return -EINVAL;
 776         }
 777
 778         if (a->generate_node_acls == 1 && flag == 0) {
 779                 pr_debug("Skipping cache_dynamic_acls=0 when"
 780                         " generate_node_acls=1\n");
 781                 return 0;
 782         }
 783
 784         a->cache_dynamic_acls = flag;
 785         pr_debug("iSCSI_TPG[%hu] - Cache Dynamic Initiator Portal Group"
 786                 " ACLs %s\n", tpg->tpgt, (a->cache_dynamic_acls) ?
 787                 "Enabled" : "Disabled");
 788
 789         return 0;
 790 }
 791
 792 int iscsit_ta_demo_mode_write_protect(
 793         struct iscsi_portal_group *tpg,
 794         u32 flag)
 795 {
 796         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 797
 798         if ((flag != 0) && (flag != 1)) {
 799                 pr_err("Illegal value %d\n", flag);
 800                 return -EINVAL;
 801         }
 802
 803         a->demo_mode_write_protect = flag;
 804         pr_debug("iSCSI_TPG[%hu] - Demo Mode Write Protect bit: %s\n",
 805                 tpg->tpgt, (a->demo_mode_write_protect) ? "ON" : "OFF");
 806
 807         return 0;
 808 }
 809
 810 int iscsit_ta_prod_mode_write_protect(
 811         struct iscsi_portal_group *tpg,
 812         u32 flag)
 813 {
 814         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 815
 816         if ((flag != 0) && (flag != 1)) {
 817                 pr_err("Illegal value %d\n", flag);
 818                 return -EINVAL;
 819         }
 820
 821         a->prod_mode_write_protect = flag;
 822         pr_debug("iSCSI_TPG[%hu] - Production Mode Write Protect bit:"
 823                 " %s\n", tpg->tpgt, (a->prod_mode_write_protect) ?
 824                 "ON" : "OFF");
 825
 826         return 0;
 827 }
 828
 829 int iscsit_ta_demo_mode_discovery(
 830         struct iscsi_portal_group *tpg,
 831         u32 flag)
 832 {
 833         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 834
 835         if ((flag != 0) && (flag != 1)) {
 836                 pr_err("Illegal value %d\n", flag);
 837                 return -EINVAL;
 838         }
 839
 840         a->demo_mode_discovery = flag;
 841         pr_debug("iSCSI_TPG[%hu] - Demo Mode Discovery bit:"
 842                 " %s\n", tpg->tpgt, (a->demo_mode_discovery) ?
 843                 "ON" : "OFF");
 844
 845         return 0;
 846 }
 847
 848 int iscsit_ta_default_erl(
 849         struct iscsi_portal_group *tpg,
 850         u32 default_erl)
 851 {
 852         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 853
 854         if ((default_erl != 0) && (default_erl != 1) && (default_erl != 2)) {
 855                 pr_err("Illegal value for default_erl: %u\n", default_erl);
 856                 return -EINVAL;
 857         }
 858
 859         a->default_erl = default_erl;
 860         pr_debug("iSCSI_TPG[%hu] - DefaultERL: %u\n", tpg->tpgt, a->default_erl);
 861
 862         return 0;
 863 }
 864
 865 int iscsit_ta_t10_pi(
 866         struct iscsi_portal_group *tpg,
 867         u32 flag)
 868 {
 869         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 870
 871         if ((flag != 0) && (flag != 1)) {
 872                 pr_err("Illegal value %d\n", flag);
 873                 return -EINVAL;
 874         }
 875
 876         a->t10_pi = flag;
 877         pr_debug("iSCSI_TPG[%hu] - T10 Protection information bit:"
 878                 " %s\n", tpg->tpgt, (a->t10_pi) ?
 879                 "ON" : "OFF");
 880
 881         return 0;
 882 }