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