drivers/target/iscsi/iscsi_target_tpg.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*******************************************************************************
   3  * This file contains iSCSI Target Portal Group related functions.
   4  *
   5  * (c) Copyright 2007-2013 Datera, Inc.
   6  *
   7  * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
   8  *
   9  ******************************************************************************/
  10
  11 #include <linux/slab.h>
  12 #include <target/target_core_base.h>
  13 #include <target/target_core_fabric.h>
  14 #include <target/iscsi/iscsi_target_core.h>
  15 #include "iscsi_target_erl0.h"
  16 #include "iscsi_target_login.h"
  17 #include "iscsi_target_nodeattrib.h"
  18 #include "iscsi_target_tpg.h"
  19 #include "iscsi_target_util.h"
  20 #include "iscsi_target.h"
  21 #include "iscsi_target_parameters.h"
  22
  23 #include <target/iscsi/iscsi_transport.h>
  24
  25 struct iscsi_portal_group *iscsit_alloc_portal_group(struct iscsi_tiqn *tiqn, u16 tpgt)
  26 {
  27         struct iscsi_portal_group *tpg;
  28
  29         tpg = kzalloc(sizeof(struct iscsi_portal_group), GFP_KERNEL);
  30         if (!tpg) {
  31                 pr_err("Unable to allocate struct iscsi_portal_group\n");
  32                 return NULL;
  33         }
  34
  35         tpg->tpgt = tpgt;
  36         tpg->tpg_state = TPG_STATE_FREE;
  37         tpg->tpg_tiqn = tiqn;
  38         INIT_LIST_HEAD(&tpg->tpg_gnp_list);
  39         INIT_LIST_HEAD(&tpg->tpg_list);
  40         mutex_init(&tpg->tpg_access_lock);
  41         sema_init(&tpg->np_login_sem, 1);
  42         spin_lock_init(&tpg->tpg_state_lock);
  43         spin_lock_init(&tpg->tpg_np_lock);
  44
  45         return tpg;
  46 }
  47
  48 static void iscsit_set_default_tpg_attribs(struct iscsi_portal_group *);
  49
  50 int iscsit_load_discovery_tpg(void)
  51 {
  52         struct iscsi_param *param;
  53         struct iscsi_portal_group *tpg;
  54         int ret;
  55
  56         tpg = iscsit_alloc_portal_group(NULL, 1);
  57         if (!tpg) {
  58                 pr_err("Unable to allocate struct iscsi_portal_group\n");
  59                 return -1;
  60         }
  61         /*
  62          * Save iscsi_ops pointer for special case discovery TPG that
  63          * doesn't exist as se_wwn->wwn_group within configfs.
  64          */
  65         tpg->tpg_se_tpg.se_tpg_tfo = &iscsi_ops;
  66         ret = core_tpg_register(NULL, &tpg->tpg_se_tpg, -1);
  67         if (ret < 0) {
  68                 kfree(tpg);
  69                 return -1;
  70         }
  71
  72         tpg->sid = 1; /* First Assigned LIO Session ID */
  73         iscsit_set_default_tpg_attribs(tpg);
  74
  75         if (iscsi_create_default_params(&tpg->param_list) < 0)
  76                 goto out;
  77         /*
  78          * By default we disable authentication for discovery sessions,
  79          * this can be changed with:
  80          *
  81          * /sys/kernel/config/target/iscsi/discovery_auth/enforce_discovery_auth
  82          */
  83         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
  84         if (!param)
  85                 goto free_pl_out;
  86
  87         if (iscsi_update_param_value(param, "CHAP,None") < 0)
  88                 goto free_pl_out;
  89
  90         tpg->tpg_attrib.authentication = 0;
  91
  92         spin_lock(&tpg->tpg_state_lock);
  93         tpg->tpg_state  = TPG_STATE_ACTIVE;
  94         spin_unlock(&tpg->tpg_state_lock);
  95
  96         iscsit_global->discovery_tpg = tpg;
  97         pr_debug("CORE[0] - Allocated Discovery TPG\n");
  98
  99         return 0;
 100 free_pl_out:
 101         iscsi_release_param_list(tpg->param_list);
 102 out:
 103         if (tpg->sid == 1)
 104                 core_tpg_deregister(&tpg->tpg_se_tpg);
 105         kfree(tpg);
 106         return -1;
 107 }
 108
 109 void iscsit_release_discovery_tpg(void)
 110 {
 111         struct iscsi_portal_group *tpg = iscsit_global->discovery_tpg;
 112
 113         if (!tpg)
 114                 return;
 115
 116         iscsi_release_param_list(tpg->param_list);
 117         core_tpg_deregister(&tpg->tpg_se_tpg);
 118
 119         kfree(tpg);
 120         iscsit_global->discovery_tpg = NULL;
 121 }
 122
 123 struct iscsi_portal_group *iscsit_get_tpg_from_np(
 124         struct iscsi_tiqn *tiqn,
 125         struct iscsi_np *np,
 126         struct iscsi_tpg_np **tpg_np_out)
 127 {
 128         struct iscsi_portal_group *tpg = NULL;
 129         struct iscsi_tpg_np *tpg_np;
 130
 131         spin_lock(&tiqn->tiqn_tpg_lock);
 132         list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) {
 133
 134                 spin_lock(&tpg->tpg_state_lock);
 135                 if (tpg->tpg_state != TPG_STATE_ACTIVE) {
 136                         spin_unlock(&tpg->tpg_state_lock);
 137                         continue;
 138                 }
 139                 spin_unlock(&tpg->tpg_state_lock);
 140
 141                 spin_lock(&tpg->tpg_np_lock);
 142                 list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
 143                         if (tpg_np->tpg_np == np) {
 144                                 *tpg_np_out = tpg_np;
 145                                 kref_get(&tpg_np->tpg_np_kref);
 146                                 spin_unlock(&tpg->tpg_np_lock);
 147                                 spin_unlock(&tiqn->tiqn_tpg_lock);
 148                                 return tpg;
 149                         }
 150                 }
 151                 spin_unlock(&tpg->tpg_np_lock);
 152         }
 153         spin_unlock(&tiqn->tiqn_tpg_lock);
 154
 155         return NULL;
 156 }
 157
 158 int iscsit_get_tpg(
 159         struct iscsi_portal_group *tpg)
 160 {
 161         return mutex_lock_interruptible(&tpg->tpg_access_lock);
 162 }
 163
 164 void iscsit_put_tpg(struct iscsi_portal_group *tpg)
 165 {
 166         mutex_unlock(&tpg->tpg_access_lock);
 167 }
 168
 169 static void iscsit_clear_tpg_np_login_thread(
 170         struct iscsi_tpg_np *tpg_np,
 171         struct iscsi_portal_group *tpg,
 172         bool shutdown)
 173 {
 174         if (!tpg_np->tpg_np) {
 175                 pr_err("struct iscsi_tpg_np->tpg_np is NULL!\n");
 176                 return;
 177         }
 178
 179         if (shutdown)
 180                 tpg_np->tpg_np->enabled = false;
 181         iscsit_reset_np_thread(tpg_np->tpg_np, tpg_np, tpg, shutdown);
 182 }
 183
 184 static void iscsit_clear_tpg_np_login_threads(
 185         struct iscsi_portal_group *tpg,
 186         bool shutdown)
 187 {
 188         struct iscsi_tpg_np *tpg_np;
 189
 190         spin_lock(&tpg->tpg_np_lock);
 191         list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
 192                 if (!tpg_np->tpg_np) {
 193                         pr_err("struct iscsi_tpg_np->tpg_np is NULL!\n");
 194                         continue;
 195                 }
 196                 spin_unlock(&tpg->tpg_np_lock);
 197                 iscsit_clear_tpg_np_login_thread(tpg_np, tpg, shutdown);
 198                 spin_lock(&tpg->tpg_np_lock);
 199         }
 200         spin_unlock(&tpg->tpg_np_lock);
 201 }
 202
 203 void iscsit_tpg_dump_params(struct iscsi_portal_group *tpg)
 204 {
 205         iscsi_print_params(tpg->param_list);
 206 }
 207
 208 static void iscsit_set_default_tpg_attribs(struct iscsi_portal_group *tpg)
 209 {
 210         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 211
 212         a->authentication = TA_AUTHENTICATION;
 213         a->login_timeout = TA_LOGIN_TIMEOUT;
 214         a->netif_timeout = TA_NETIF_TIMEOUT;
 215         a->default_cmdsn_depth = TA_DEFAULT_CMDSN_DEPTH;
 216         a->generate_node_acls = TA_GENERATE_NODE_ACLS;
 217         a->cache_dynamic_acls = TA_CACHE_DYNAMIC_ACLS;
 218         a->demo_mode_write_protect = TA_DEMO_MODE_WRITE_PROTECT;
 219         a->prod_mode_write_protect = TA_PROD_MODE_WRITE_PROTECT;
 220         a->demo_mode_discovery = TA_DEMO_MODE_DISCOVERY;
 221         a->default_erl = TA_DEFAULT_ERL;
 222         a->t10_pi = TA_DEFAULT_T10_PI;
 223         a->fabric_prot_type = TA_DEFAULT_FABRIC_PROT_TYPE;
 224         a->tpg_enabled_sendtargets = TA_DEFAULT_TPG_ENABLED_SENDTARGETS;
 225         a->login_keys_workaround = TA_DEFAULT_LOGIN_KEYS_WORKAROUND;
 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         tpg->tpg_attrib.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         return -ENOMEM;
 260 }
 261
 262 int iscsit_tpg_del_portal_group(
 263         struct iscsi_tiqn *tiqn,
 264         struct iscsi_portal_group *tpg,
 265         int force)
 266 {
 267         u8 old_state = tpg->tpg_state;
 268
 269         spin_lock(&tpg->tpg_state_lock);
 270         tpg->tpg_state = TPG_STATE_INACTIVE;
 271         spin_unlock(&tpg->tpg_state_lock);
 272
 273         if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
 274                 pr_err("Unable to delete iSCSI Target Portal Group:"
 275                         " %hu while active sessions exist, and force=0\n",
 276                         tpg->tpgt);
 277                 tpg->tpg_state = old_state;
 278                 return -EPERM;
 279         }
 280
 281         if (tpg->param_list) {
 282                 iscsi_release_param_list(tpg->param_list);
 283                 tpg->param_list = NULL;
 284         }
 285
 286         core_tpg_deregister(&tpg->tpg_se_tpg);
 287
 288         spin_lock(&tpg->tpg_state_lock);
 289         tpg->tpg_state = TPG_STATE_FREE;
 290         spin_unlock(&tpg->tpg_state_lock);
 291
 292         spin_lock(&tiqn->tiqn_tpg_lock);
 293         tiqn->tiqn_ntpgs--;
 294         list_del(&tpg->tpg_list);
 295         spin_unlock(&tiqn->tiqn_tpg_lock);
 296
 297         pr_debug("CORE[%s]_TPG[%hu] - Deleted iSCSI Target Portal Group\n",
 298                         tiqn->tiqn, tpg->tpgt);
 299
 300         kfree(tpg);
 301         return 0;
 302 }
 303
 304 int iscsit_tpg_enable_portal_group(struct iscsi_portal_group *tpg)
 305 {
 306         struct iscsi_param *param;
 307         struct iscsi_tiqn *tiqn = tpg->tpg_tiqn;
 308         int ret;
 309
 310         if (tpg->tpg_state == TPG_STATE_ACTIVE) {
 311                 pr_err("iSCSI target portal group: %hu is already"
 312                         " active, ignoring request.\n", tpg->tpgt);
 313                 return -EINVAL;
 314         }
 315         /*
 316          * Make sure that AuthMethod does not contain None as an option
 317          * unless explictly disabled.  Set the default to CHAP if authentication
 318          * is enforced (as per default), and remove the NONE option.
 319          */
 320         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
 321         if (!param)
 322                 return -EINVAL;
 323
 324         if (tpg->tpg_attrib.authentication) {
 325                 if (!strcmp(param->value, NONE)) {
 326                         ret = iscsi_update_param_value(param, CHAP);
 327                         if (ret)
 328                                 goto err;
 329                 }
 330
 331                 ret = iscsit_ta_authentication(tpg, 1);
 332                 if (ret < 0)
 333                         goto err;
 334         }
 335
 336         spin_lock(&tpg->tpg_state_lock);
 337         tpg->tpg_state = TPG_STATE_ACTIVE;
 338         spin_unlock(&tpg->tpg_state_lock);
 339
 340         spin_lock(&tiqn->tiqn_tpg_lock);
 341         tiqn->tiqn_active_tpgs++;
 342         pr_debug("iSCSI_TPG[%hu] - Enabled iSCSI Target Portal Group\n",
 343                         tpg->tpgt);
 344         spin_unlock(&tiqn->tiqn_tpg_lock);
 345
 346         return 0;
 347
 348 err:
 349         return ret;
 350 }
 351
 352 int iscsit_tpg_disable_portal_group(struct iscsi_portal_group *tpg, int force)
 353 {
 354         struct iscsi_tiqn *tiqn;
 355         u8 old_state = tpg->tpg_state;
 356
 357         spin_lock(&tpg->tpg_state_lock);
 358         if (tpg->tpg_state == TPG_STATE_INACTIVE) {
 359                 pr_err("iSCSI Target Portal Group: %hu is already"
 360                         " inactive, ignoring request.\n", tpg->tpgt);
 361                 spin_unlock(&tpg->tpg_state_lock);
 362                 return -EINVAL;
 363         }
 364         tpg->tpg_state = TPG_STATE_INACTIVE;
 365         spin_unlock(&tpg->tpg_state_lock);
 366
 367         iscsit_clear_tpg_np_login_threads(tpg, false);
 368
 369         if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
 370                 spin_lock(&tpg->tpg_state_lock);
 371                 tpg->tpg_state = old_state;
 372                 spin_unlock(&tpg->tpg_state_lock);
 373                 pr_err("Unable to disable iSCSI Target Portal Group:"
 374                         " %hu while active sessions exist, and force=0\n",
 375                         tpg->tpgt);
 376                 return -EPERM;
 377         }
 378
 379         tiqn = tpg->tpg_tiqn;
 380         if (!tiqn || (tpg == iscsit_global->discovery_tpg))
 381                 return 0;
 382
 383         spin_lock(&tiqn->tiqn_tpg_lock);
 384         tiqn->tiqn_active_tpgs--;
 385         pr_debug("iSCSI_TPG[%hu] - Disabled iSCSI Target Portal Group\n",
 386                         tpg->tpgt);
 387         spin_unlock(&tiqn->tiqn_tpg_lock);
 388
 389         return 0;
 390 }
 391
 392 struct iscsi_node_attrib *iscsit_tpg_get_node_attrib(
 393         struct iscsi_session *sess)
 394 {
 395         struct se_session *se_sess = sess->se_sess;
 396         struct se_node_acl *se_nacl = se_sess->se_node_acl;
 397         struct iscsi_node_acl *acl = container_of(se_nacl, struct iscsi_node_acl,
 398                                         se_node_acl);
 399
 400         return &acl->node_attrib;
 401 }
 402
 403 struct iscsi_tpg_np *iscsit_tpg_locate_child_np(
 404         struct iscsi_tpg_np *tpg_np,
 405         int network_transport)
 406 {
 407         struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
 408
 409         spin_lock(&tpg_np->tpg_np_parent_lock);
 410         list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
 411                         &tpg_np->tpg_np_parent_list, tpg_np_child_list) {
 412                 if (tpg_np_child->tpg_np->np_network_transport ==
 413                                 network_transport) {
 414                         spin_unlock(&tpg_np->tpg_np_parent_lock);
 415                         return tpg_np_child;
 416                 }
 417         }
 418         spin_unlock(&tpg_np->tpg_np_parent_lock);
 419
 420         return NULL;
 421 }
 422
 423 static bool iscsit_tpg_check_network_portal(
 424         struct iscsi_tiqn *tiqn,
 425         struct sockaddr_storage *sockaddr,
 426         int network_transport)
 427 {
 428         struct iscsi_portal_group *tpg;
 429         struct iscsi_tpg_np *tpg_np;
 430         struct iscsi_np *np;
 431         bool match = false;
 432
 433         spin_lock(&tiqn->tiqn_tpg_lock);
 434         list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) {
 435
 436                 spin_lock(&tpg->tpg_np_lock);
 437                 list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
 438                         np = tpg_np->tpg_np;
 439
 440                         match = iscsit_check_np_match(sockaddr, np,
 441                                                 network_transport);
 442                         if (match)
 443                                 break;
 444                 }
 445                 spin_unlock(&tpg->tpg_np_lock);
 446         }
 447         spin_unlock(&tiqn->tiqn_tpg_lock);
 448
 449         return match;
 450 }
 451
 452 struct iscsi_tpg_np *iscsit_tpg_add_network_portal(
 453         struct iscsi_portal_group *tpg,
 454         struct sockaddr_storage *sockaddr,
 455         struct iscsi_tpg_np *tpg_np_parent,
 456         int network_transport)
 457 {
 458         struct iscsi_np *np;
 459         struct iscsi_tpg_np *tpg_np;
 460
 461         if (!tpg_np_parent) {
 462                 if (iscsit_tpg_check_network_portal(tpg->tpg_tiqn, sockaddr,
 463                                 network_transport)) {
 464                         pr_err("Network Portal: %pISc already exists on a"
 465                                 " different TPG on %s\n", sockaddr,
 466                                 tpg->tpg_tiqn->tiqn);
 467                         return ERR_PTR(-EEXIST);
 468                 }
 469         }
 470
 471         tpg_np = kzalloc(sizeof(struct iscsi_tpg_np), GFP_KERNEL);
 472         if (!tpg_np) {
 473                 pr_err("Unable to allocate memory for"
 474                                 " struct iscsi_tpg_np.\n");
 475                 return ERR_PTR(-ENOMEM);
 476         }
 477
 478         np = iscsit_add_np(sockaddr, network_transport);
 479         if (IS_ERR(np)) {
 480                 kfree(tpg_np);
 481                 return ERR_CAST(np);
 482         }
 483
 484         INIT_LIST_HEAD(&tpg_np->tpg_np_list);
 485         INIT_LIST_HEAD(&tpg_np->tpg_np_child_list);
 486         INIT_LIST_HEAD(&tpg_np->tpg_np_parent_list);
 487         spin_lock_init(&tpg_np->tpg_np_parent_lock);
 488         init_completion(&tpg_np->tpg_np_comp);
 489         kref_init(&tpg_np->tpg_np_kref);
 490         tpg_np->tpg_np          = np;
 491         tpg_np->tpg             = tpg;
 492
 493         spin_lock(&tpg->tpg_np_lock);
 494         list_add_tail(&tpg_np->tpg_np_list, &tpg->tpg_gnp_list);
 495         tpg->num_tpg_nps++;
 496         if (tpg->tpg_tiqn)
 497                 tpg->tpg_tiqn->tiqn_num_tpg_nps++;
 498         spin_unlock(&tpg->tpg_np_lock);
 499
 500         if (tpg_np_parent) {
 501                 tpg_np->tpg_np_parent = tpg_np_parent;
 502                 spin_lock(&tpg_np_parent->tpg_np_parent_lock);
 503                 list_add_tail(&tpg_np->tpg_np_child_list,
 504                         &tpg_np_parent->tpg_np_parent_list);
 505                 spin_unlock(&tpg_np_parent->tpg_np_parent_lock);
 506         }
 507
 508         pr_debug("CORE[%s] - Added Network Portal: %pISpc,%hu on %s\n",
 509                 tpg->tpg_tiqn->tiqn, &np->np_sockaddr, tpg->tpgt,
 510                 np->np_transport->name);
 511
 512         return tpg_np;
 513 }
 514
 515 static int iscsit_tpg_release_np(
 516         struct iscsi_tpg_np *tpg_np,
 517         struct iscsi_portal_group *tpg,
 518         struct iscsi_np *np)
 519 {
 520         iscsit_clear_tpg_np_login_thread(tpg_np, tpg, true);
 521
 522         pr_debug("CORE[%s] - Removed Network Portal: %pISpc,%hu on %s\n",
 523                 tpg->tpg_tiqn->tiqn, &np->np_sockaddr, tpg->tpgt,
 524                 np->np_transport->name);
 525
 526         tpg_np->tpg_np = NULL;
 527         tpg_np->tpg = NULL;
 528         kfree(tpg_np);
 529         /*
 530          * iscsit_del_np() will shutdown struct iscsi_np when last TPG reference is released.
 531          */
 532         return iscsit_del_np(np);
 533 }
 534
 535 int iscsit_tpg_del_network_portal(
 536         struct iscsi_portal_group *tpg,
 537         struct iscsi_tpg_np *tpg_np)
 538 {
 539         struct iscsi_np *np;
 540         struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
 541         int ret = 0;
 542
 543         np = tpg_np->tpg_np;
 544         if (!np) {
 545                 pr_err("Unable to locate struct iscsi_np from"
 546                                 " struct iscsi_tpg_np\n");
 547                 return -EINVAL;
 548         }
 549
 550         if (!tpg_np->tpg_np_parent) {
 551                 /*
 552                  * We are the parent tpg network portal.  Release all of the
 553                  * child tpg_np's (eg: the non ISCSI_TCP ones) on our parent
 554                  * list first.
 555                  */
 556                 list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
 557                                 &tpg_np->tpg_np_parent_list,
 558                                 tpg_np_child_list) {
 559                         ret = iscsit_tpg_del_network_portal(tpg, tpg_np_child);
 560                         if (ret < 0)
 561                                 pr_err("iscsit_tpg_del_network_portal()"
 562                                         " failed: %d\n", ret);
 563                 }
 564         } else {
 565                 /*
 566                  * We are not the parent ISCSI_TCP tpg network portal.  Release
 567                  * our own network portals from the child list.
 568                  */
 569                 spin_lock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
 570                 list_del(&tpg_np->tpg_np_child_list);
 571                 spin_unlock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
 572         }
 573
 574         spin_lock(&tpg->tpg_np_lock);
 575         list_del(&tpg_np->tpg_np_list);
 576         tpg->num_tpg_nps--;
 577         if (tpg->tpg_tiqn)
 578                 tpg->tpg_tiqn->tiqn_num_tpg_nps--;
 579         spin_unlock(&tpg->tpg_np_lock);
 580
 581         return iscsit_tpg_release_np(tpg_np, tpg, np);
 582 }
 583
 584 int iscsit_ta_authentication(struct iscsi_portal_group *tpg, u32 authentication)
 585 {
 586         unsigned char buf1[256], buf2[256], *none = NULL;
 587         int len;
 588         struct iscsi_param *param;
 589         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 590
 591         if ((authentication != 1) && (authentication != 0)) {
 592                 pr_err("Illegal value for authentication parameter:"
 593                         " %u, ignoring request.\n", authentication);
 594                 return -EINVAL;
 595         }
 596
 597         memset(buf1, 0, sizeof(buf1));
 598         memset(buf2, 0, sizeof(buf2));
 599
 600         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
 601         if (!param)
 602                 return -EINVAL;
 603
 604         if (authentication) {
 605                 snprintf(buf1, sizeof(buf1), "%s", param->value);
 606                 none = strstr(buf1, NONE);
 607                 if (!none)
 608                         goto out;
 609                 if (!strncmp(none + 4, ",", 1)) {
 610                         if (!strcmp(buf1, none))
 611                                 sprintf(buf2, "%s", none+5);
 612                         else {
 613                                 none--;
 614                                 *none = '\0';
 615                                 len = sprintf(buf2, "%s", buf1);
 616                                 none += 5;
 617                                 sprintf(buf2 + len, "%s", none);
 618                         }
 619                 } else {
 620                         none--;
 621                         *none = '\0';
 622                         sprintf(buf2, "%s", buf1);
 623                 }
 624                 if (iscsi_update_param_value(param, buf2) < 0)
 625                         return -EINVAL;
 626         } else {
 627                 snprintf(buf1, sizeof(buf1), "%s", param->value);
 628                 none = strstr(buf1, NONE);
 629                 if (none)
 630                         goto out;
 631                 strlcat(buf1, "," NONE, sizeof(buf1));
 632                 if (iscsi_update_param_value(param, buf1) < 0)
 633                         return -EINVAL;
 634         }
 635
 636 out:
 637         a->authentication = authentication;
 638         pr_debug("%s iSCSI Authentication Methods for TPG: %hu.\n",
 639                 a->authentication ? "Enforcing" : "Disabling", tpg->tpgt);
 640
 641         return 0;
 642 }
 643
 644 int iscsit_ta_login_timeout(
 645         struct iscsi_portal_group *tpg,
 646         u32 login_timeout)
 647 {
 648         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 649
 650         if (login_timeout > TA_LOGIN_TIMEOUT_MAX) {
 651                 pr_err("Requested Login Timeout %u larger than maximum"
 652                         " %u\n", login_timeout, TA_LOGIN_TIMEOUT_MAX);
 653                 return -EINVAL;
 654         } else if (login_timeout < TA_LOGIN_TIMEOUT_MIN) {
 655                 pr_err("Requested Logout Timeout %u smaller than"
 656                         " minimum %u\n", login_timeout, TA_LOGIN_TIMEOUT_MIN);
 657                 return -EINVAL;
 658         }
 659
 660         a->login_timeout = login_timeout;
 661         pr_debug("Set Logout Timeout to %u for Target Portal Group"
 662                 " %hu\n", a->login_timeout, tpg->tpgt);
 663
 664         return 0;
 665 }
 666
 667 int iscsit_ta_netif_timeout(
 668         struct iscsi_portal_group *tpg,
 669         u32 netif_timeout)
 670 {
 671         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 672
 673         if (netif_timeout > TA_NETIF_TIMEOUT_MAX) {
 674                 pr_err("Requested Network Interface Timeout %u larger"
 675                         " than maximum %u\n", netif_timeout,
 676                                 TA_NETIF_TIMEOUT_MAX);
 677                 return -EINVAL;
 678         } else if (netif_timeout < TA_NETIF_TIMEOUT_MIN) {
 679                 pr_err("Requested Network Interface Timeout %u smaller"
 680                         " than minimum %u\n", netif_timeout,
 681                                 TA_NETIF_TIMEOUT_MIN);
 682                 return -EINVAL;
 683         }
 684
 685         a->netif_timeout = netif_timeout;
 686         pr_debug("Set Network Interface Timeout to %u for"
 687                 " Target Portal Group %hu\n", a->netif_timeout, tpg->tpgt);
 688
 689         return 0;
 690 }
 691
 692 int iscsit_ta_generate_node_acls(
 693         struct iscsi_portal_group *tpg,
 694         u32 flag)
 695 {
 696         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 697
 698         if ((flag != 0) && (flag != 1)) {
 699                 pr_err("Illegal value %d\n", flag);
 700                 return -EINVAL;
 701         }
 702
 703         a->generate_node_acls = flag;
 704         pr_debug("iSCSI_TPG[%hu] - Generate Initiator Portal Group ACLs: %s\n",
 705                 tpg->tpgt, (a->generate_node_acls) ? "Enabled" : "Disabled");
 706
 707         if (flag == 1 && a->cache_dynamic_acls == 0) {
 708                 pr_debug("Explicitly setting cache_dynamic_acls=1 when "
 709                         "generate_node_acls=1\n");
 710                 a->cache_dynamic_acls = 1;
 711         }
 712
 713         return 0;
 714 }
 715
 716 int iscsit_ta_default_cmdsn_depth(
 717         struct iscsi_portal_group *tpg,
 718         u32 tcq_depth)
 719 {
 720         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 721
 722         if (tcq_depth > TA_DEFAULT_CMDSN_DEPTH_MAX) {
 723                 pr_err("Requested Default Queue Depth: %u larger"
 724                         " than maximum %u\n", tcq_depth,
 725                                 TA_DEFAULT_CMDSN_DEPTH_MAX);
 726                 return -EINVAL;
 727         } else if (tcq_depth < TA_DEFAULT_CMDSN_DEPTH_MIN) {
 728                 pr_err("Requested Default Queue Depth: %u smaller"
 729                         " than minimum %u\n", tcq_depth,
 730                                 TA_DEFAULT_CMDSN_DEPTH_MIN);
 731                 return -EINVAL;
 732         }
 733
 734         a->default_cmdsn_depth = tcq_depth;
 735         pr_debug("iSCSI_TPG[%hu] - Set Default CmdSN TCQ Depth to %u\n",
 736                 tpg->tpgt, a->default_cmdsn_depth);
 737
 738         return 0;
 739 }
 740
 741 int iscsit_ta_cache_dynamic_acls(
 742         struct iscsi_portal_group *tpg,
 743         u32 flag)
 744 {
 745         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 746
 747         if ((flag != 0) && (flag != 1)) {
 748                 pr_err("Illegal value %d\n", flag);
 749                 return -EINVAL;
 750         }
 751
 752         if (a->generate_node_acls == 1 && flag == 0) {
 753                 pr_debug("Skipping cache_dynamic_acls=0 when"
 754                         " generate_node_acls=1\n");
 755                 return 0;
 756         }
 757
 758         a->cache_dynamic_acls = flag;
 759         pr_debug("iSCSI_TPG[%hu] - Cache Dynamic Initiator Portal Group"
 760                 " ACLs %s\n", tpg->tpgt, (a->cache_dynamic_acls) ?
 761                 "Enabled" : "Disabled");
 762
 763         return 0;
 764 }
 765
 766 int iscsit_ta_demo_mode_write_protect(
 767         struct iscsi_portal_group *tpg,
 768         u32 flag)
 769 {
 770         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 771
 772         if ((flag != 0) && (flag != 1)) {
 773                 pr_err("Illegal value %d\n", flag);
 774                 return -EINVAL;
 775         }
 776
 777         a->demo_mode_write_protect = flag;
 778         pr_debug("iSCSI_TPG[%hu] - Demo Mode Write Protect bit: %s\n",
 779                 tpg->tpgt, (a->demo_mode_write_protect) ? "ON" : "OFF");
 780
 781         return 0;
 782 }
 783
 784 int iscsit_ta_prod_mode_write_protect(
 785         struct iscsi_portal_group *tpg,
 786         u32 flag)
 787 {
 788         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 789
 790         if ((flag != 0) && (flag != 1)) {
 791                 pr_err("Illegal value %d\n", flag);
 792                 return -EINVAL;
 793         }
 794
 795         a->prod_mode_write_protect = flag;
 796         pr_debug("iSCSI_TPG[%hu] - Production Mode Write Protect bit:"
 797                 " %s\n", tpg->tpgt, (a->prod_mode_write_protect) ?
 798                 "ON" : "OFF");
 799
 800         return 0;
 801 }
 802
 803 int iscsit_ta_demo_mode_discovery(
 804         struct iscsi_portal_group *tpg,
 805         u32 flag)
 806 {
 807         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 808
 809         if ((flag != 0) && (flag != 1)) {
 810                 pr_err("Illegal value %d\n", flag);
 811                 return -EINVAL;
 812         }
 813
 814         a->demo_mode_discovery = flag;
 815         pr_debug("iSCSI_TPG[%hu] - Demo Mode Discovery bit:"
 816                 " %s\n", tpg->tpgt, (a->demo_mode_discovery) ?
 817                 "ON" : "OFF");
 818
 819         return 0;
 820 }
 821
 822 int iscsit_ta_default_erl(
 823         struct iscsi_portal_group *tpg,
 824         u32 default_erl)
 825 {
 826         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 827
 828         if ((default_erl != 0) && (default_erl != 1) && (default_erl != 2)) {
 829                 pr_err("Illegal value for default_erl: %u\n", default_erl);
 830                 return -EINVAL;
 831         }
 832
 833         a->default_erl = default_erl;
 834         pr_debug("iSCSI_TPG[%hu] - DefaultERL: %u\n", tpg->tpgt, a->default_erl);
 835
 836         return 0;
 837 }
 838
 839 int iscsit_ta_t10_pi(
 840         struct iscsi_portal_group *tpg,
 841         u32 flag)
 842 {
 843         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 844
 845         if ((flag != 0) && (flag != 1)) {
 846                 pr_err("Illegal value %d\n", flag);
 847                 return -EINVAL;
 848         }
 849
 850         a->t10_pi = flag;
 851         pr_debug("iSCSI_TPG[%hu] - T10 Protection information bit:"
 852                 " %s\n", tpg->tpgt, (a->t10_pi) ?
 853                 "ON" : "OFF");
 854
 855         return 0;
 856 }
 857
 858 int iscsit_ta_fabric_prot_type(
 859         struct iscsi_portal_group *tpg,
 860         u32 prot_type)
 861 {
 862         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 863
 864         if ((prot_type != 0) && (prot_type != 1) && (prot_type != 3)) {
 865                 pr_err("Illegal value for fabric_prot_type: %u\n", prot_type);
 866                 return -EINVAL;
 867         }
 868
 869         a->fabric_prot_type = prot_type;
 870         pr_debug("iSCSI_TPG[%hu] - T10 Fabric Protection Type: %u\n",
 871                  tpg->tpgt, prot_type);
 872
 873         return 0;
 874 }
 875
 876 int iscsit_ta_tpg_enabled_sendtargets(
 877         struct iscsi_portal_group *tpg,
 878         u32 flag)
 879 {
 880         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 881
 882         if ((flag != 0) && (flag != 1)) {
 883                 pr_err("Illegal value %d\n", flag);
 884                 return -EINVAL;
 885         }
 886
 887         a->tpg_enabled_sendtargets = flag;
 888         pr_debug("iSCSI_TPG[%hu] - TPG enabled bit required for SendTargets:"
 889                 " %s\n", tpg->tpgt, (a->tpg_enabled_sendtargets) ? "ON" : "OFF");
 890
 891         return 0;
 892 }
 893
 894 int iscsit_ta_login_keys_workaround(
 895         struct iscsi_portal_group *tpg,
 896         u32 flag)
 897 {
 898         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 899
 900         if ((flag != 0) && (flag != 1)) {
 901                 pr_err("Illegal value %d\n", flag);
 902                 return -EINVAL;
 903         }
 904
 905         a->login_keys_workaround = flag;
 906         pr_debug("iSCSI_TPG[%hu] - TPG enabled bit for login keys workaround: %s ",
 907                 tpg->tpgt, (a->login_keys_workaround) ? "ON" : "OFF");
 908
 909         return 0;
 910 }