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