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                 if (match)
 448                         break;
 449         }
 450         spin_unlock(&tiqn->tiqn_tpg_lock);
 451
 452         return match;
 453 }
 454
 455 struct iscsi_tpg_np *iscsit_tpg_add_network_portal(
 456         struct iscsi_portal_group *tpg,
 457         struct sockaddr_storage *sockaddr,
 458         struct iscsi_tpg_np *tpg_np_parent,
 459         int network_transport)
 460 {
 461         struct iscsi_np *np;
 462         struct iscsi_tpg_np *tpg_np;
 463
 464         if (!tpg_np_parent) {
 465                 if (iscsit_tpg_check_network_portal(tpg->tpg_tiqn, sockaddr,
 466                                 network_transport)) {
 467                         pr_err("Network Portal: %pISc already exists on a"
 468                                 " different TPG on %s\n", sockaddr,
 469                                 tpg->tpg_tiqn->tiqn);
 470                         return ERR_PTR(-EEXIST);
 471                 }
 472         }
 473
 474         tpg_np = kzalloc(sizeof(struct iscsi_tpg_np), GFP_KERNEL);
 475         if (!tpg_np) {
 476                 pr_err("Unable to allocate memory for"
 477                                 " struct iscsi_tpg_np.\n");
 478                 return ERR_PTR(-ENOMEM);
 479         }
 480
 481         np = iscsit_add_np(sockaddr, network_transport);
 482         if (IS_ERR(np)) {
 483                 kfree(tpg_np);
 484                 return ERR_CAST(np);
 485         }
 486
 487         INIT_LIST_HEAD(&tpg_np->tpg_np_list);
 488         INIT_LIST_HEAD(&tpg_np->tpg_np_child_list);
 489         INIT_LIST_HEAD(&tpg_np->tpg_np_parent_list);
 490         spin_lock_init(&tpg_np->tpg_np_parent_lock);
 491         init_completion(&tpg_np->tpg_np_comp);
 492         kref_init(&tpg_np->tpg_np_kref);
 493         tpg_np->tpg_np          = np;
 494         tpg_np->tpg             = tpg;
 495
 496         spin_lock(&tpg->tpg_np_lock);
 497         list_add_tail(&tpg_np->tpg_np_list, &tpg->tpg_gnp_list);
 498         tpg->num_tpg_nps++;
 499         if (tpg->tpg_tiqn)
 500                 tpg->tpg_tiqn->tiqn_num_tpg_nps++;
 501         spin_unlock(&tpg->tpg_np_lock);
 502
 503         if (tpg_np_parent) {
 504                 tpg_np->tpg_np_parent = tpg_np_parent;
 505                 spin_lock(&tpg_np_parent->tpg_np_parent_lock);
 506                 list_add_tail(&tpg_np->tpg_np_child_list,
 507                         &tpg_np_parent->tpg_np_parent_list);
 508                 spin_unlock(&tpg_np_parent->tpg_np_parent_lock);
 509         }
 510
 511         pr_debug("CORE[%s] - Added Network Portal: %pISpc,%hu on %s\n",
 512                 tpg->tpg_tiqn->tiqn, &np->np_sockaddr, tpg->tpgt,
 513                 np->np_transport->name);
 514
 515         return tpg_np;
 516 }
 517
 518 static int iscsit_tpg_release_np(
 519         struct iscsi_tpg_np *tpg_np,
 520         struct iscsi_portal_group *tpg,
 521         struct iscsi_np *np)
 522 {
 523         iscsit_clear_tpg_np_login_thread(tpg_np, tpg, true);
 524
 525         pr_debug("CORE[%s] - Removed Network Portal: %pISpc,%hu on %s\n",
 526                 tpg->tpg_tiqn->tiqn, &np->np_sockaddr, tpg->tpgt,
 527                 np->np_transport->name);
 528
 529         tpg_np->tpg_np = NULL;
 530         tpg_np->tpg = NULL;
 531         kfree(tpg_np);
 532         /*
 533          * iscsit_del_np() will shutdown struct iscsi_np when last TPG reference is released.
 534          */
 535         return iscsit_del_np(np);
 536 }
 537
 538 int iscsit_tpg_del_network_portal(
 539         struct iscsi_portal_group *tpg,
 540         struct iscsi_tpg_np *tpg_np)
 541 {
 542         struct iscsi_np *np;
 543         struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
 544         int ret = 0;
 545
 546         np = tpg_np->tpg_np;
 547         if (!np) {
 548                 pr_err("Unable to locate struct iscsi_np from"
 549                                 " struct iscsi_tpg_np\n");
 550                 return -EINVAL;
 551         }
 552
 553         if (!tpg_np->tpg_np_parent) {
 554                 /*
 555                  * We are the parent tpg network portal.  Release all of the
 556                  * child tpg_np's (eg: the non ISCSI_TCP ones) on our parent
 557                  * list first.
 558                  */
 559                 list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
 560                                 &tpg_np->tpg_np_parent_list,
 561                                 tpg_np_child_list) {
 562                         ret = iscsit_tpg_del_network_portal(tpg, tpg_np_child);
 563                         if (ret < 0)
 564                                 pr_err("iscsit_tpg_del_network_portal()"
 565                                         " failed: %d\n", ret);
 566                 }
 567         } else {
 568                 /*
 569                  * We are not the parent ISCSI_TCP tpg network portal.  Release
 570                  * our own network portals from the child list.
 571                  */
 572                 spin_lock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
 573                 list_del(&tpg_np->tpg_np_child_list);
 574                 spin_unlock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
 575         }
 576
 577         spin_lock(&tpg->tpg_np_lock);
 578         list_del(&tpg_np->tpg_np_list);
 579         tpg->num_tpg_nps--;
 580         if (tpg->tpg_tiqn)
 581                 tpg->tpg_tiqn->tiqn_num_tpg_nps--;
 582         spin_unlock(&tpg->tpg_np_lock);
 583
 584         return iscsit_tpg_release_np(tpg_np, tpg, np);
 585 }
 586
 587 int iscsit_ta_authentication(struct iscsi_portal_group *tpg, u32 authentication)
 588 {
 589         unsigned char buf1[256], buf2[256], *none = NULL;
 590         int len;
 591         struct iscsi_param *param;
 592         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 593
 594         if ((authentication != 1) && (authentication != 0)) {
 595                 pr_err("Illegal value for authentication parameter:"
 596                         " %u, ignoring request.\n", authentication);
 597                 return -EINVAL;
 598         }
 599
 600         memset(buf1, 0, sizeof(buf1));
 601         memset(buf2, 0, sizeof(buf2));
 602
 603         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
 604         if (!param)
 605                 return -EINVAL;
 606
 607         if (authentication) {
 608                 snprintf(buf1, sizeof(buf1), "%s", param->value);
 609                 none = strstr(buf1, NONE);
 610                 if (!none)
 611                         goto out;
 612                 if (!strncmp(none + 4, ",", 1)) {
 613                         if (!strcmp(buf1, none))
 614                                 sprintf(buf2, "%s", none+5);
 615                         else {
 616                                 none--;
 617                                 *none = '\0';
 618                                 len = sprintf(buf2, "%s", buf1);
 619                                 none += 5;
 620                                 sprintf(buf2 + len, "%s", none);
 621                         }
 622                 } else {
 623                         none--;
 624                         *none = '\0';
 625                         sprintf(buf2, "%s", buf1);
 626                 }
 627                 if (iscsi_update_param_value(param, buf2) < 0)
 628                         return -EINVAL;
 629         } else {
 630                 snprintf(buf1, sizeof(buf1), "%s", param->value);
 631                 none = strstr(buf1, NONE);
 632                 if (none)
 633                         goto out;
 634                 strlcat(buf1, "," NONE, sizeof(buf1));
 635                 if (iscsi_update_param_value(param, buf1) < 0)
 636                         return -EINVAL;
 637         }
 638
 639 out:
 640         a->authentication = authentication;
 641         pr_debug("%s iSCSI Authentication Methods for TPG: %hu.\n",
 642                 a->authentication ? "Enforcing" : "Disabling", tpg->tpgt);
 643
 644         return 0;
 645 }
 646
 647 int iscsit_ta_login_timeout(
 648         struct iscsi_portal_group *tpg,
 649         u32 login_timeout)
 650 {
 651         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 652
 653         if (login_timeout > TA_LOGIN_TIMEOUT_MAX) {
 654                 pr_err("Requested Login Timeout %u larger than maximum"
 655                         " %u\n", login_timeout, TA_LOGIN_TIMEOUT_MAX);
 656                 return -EINVAL;
 657         } else if (login_timeout < TA_LOGIN_TIMEOUT_MIN) {
 658                 pr_err("Requested Logout Timeout %u smaller than"
 659                         " minimum %u\n", login_timeout, TA_LOGIN_TIMEOUT_MIN);
 660                 return -EINVAL;
 661         }
 662
 663         a->login_timeout = login_timeout;
 664         pr_debug("Set Logout Timeout to %u for Target Portal Group"
 665                 " %hu\n", a->login_timeout, tpg->tpgt);
 666
 667         return 0;
 668 }
 669
 670 int iscsit_ta_netif_timeout(
 671         struct iscsi_portal_group *tpg,
 672         u32 netif_timeout)
 673 {
 674         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 675
 676         if (netif_timeout > TA_NETIF_TIMEOUT_MAX) {
 677                 pr_err("Requested Network Interface Timeout %u larger"
 678                         " than maximum %u\n", netif_timeout,
 679                                 TA_NETIF_TIMEOUT_MAX);
 680                 return -EINVAL;
 681         } else if (netif_timeout < TA_NETIF_TIMEOUT_MIN) {
 682                 pr_err("Requested Network Interface Timeout %u smaller"
 683                         " than minimum %u\n", netif_timeout,
 684                                 TA_NETIF_TIMEOUT_MIN);
 685                 return -EINVAL;
 686         }
 687
 688         a->netif_timeout = netif_timeout;
 689         pr_debug("Set Network Interface Timeout to %u for"
 690                 " Target Portal Group %hu\n", a->netif_timeout, tpg->tpgt);
 691
 692         return 0;
 693 }
 694
 695 int iscsit_ta_generate_node_acls(
 696         struct iscsi_portal_group *tpg,
 697         u32 flag)
 698 {
 699         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 700
 701         if ((flag != 0) && (flag != 1)) {
 702                 pr_err("Illegal value %d\n", flag);
 703                 return -EINVAL;
 704         }
 705
 706         a->generate_node_acls = flag;
 707         pr_debug("iSCSI_TPG[%hu] - Generate Initiator Portal Group ACLs: %s\n",
 708                 tpg->tpgt, (a->generate_node_acls) ? "Enabled" : "Disabled");
 709
 710         if (flag == 1 && a->cache_dynamic_acls == 0) {
 711                 pr_debug("Explicitly setting cache_dynamic_acls=1 when "
 712                         "generate_node_acls=1\n");
 713                 a->cache_dynamic_acls = 1;
 714         }
 715
 716         return 0;
 717 }
 718
 719 int iscsit_ta_default_cmdsn_depth(
 720         struct iscsi_portal_group *tpg,
 721         u32 tcq_depth)
 722 {
 723         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 724
 725         if (tcq_depth > TA_DEFAULT_CMDSN_DEPTH_MAX) {
 726                 pr_err("Requested Default Queue Depth: %u larger"
 727                         " than maximum %u\n", tcq_depth,
 728                                 TA_DEFAULT_CMDSN_DEPTH_MAX);
 729                 return -EINVAL;
 730         } else if (tcq_depth < TA_DEFAULT_CMDSN_DEPTH_MIN) {
 731                 pr_err("Requested Default Queue Depth: %u smaller"
 732                         " than minimum %u\n", tcq_depth,
 733                                 TA_DEFAULT_CMDSN_DEPTH_MIN);
 734                 return -EINVAL;
 735         }
 736
 737         a->default_cmdsn_depth = tcq_depth;
 738         pr_debug("iSCSI_TPG[%hu] - Set Default CmdSN TCQ Depth to %u\n",
 739                 tpg->tpgt, a->default_cmdsn_depth);
 740
 741         return 0;
 742 }
 743
 744 int iscsit_ta_cache_dynamic_acls(
 745         struct iscsi_portal_group *tpg,
 746         u32 flag)
 747 {
 748         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 749
 750         if ((flag != 0) && (flag != 1)) {
 751                 pr_err("Illegal value %d\n", flag);
 752                 return -EINVAL;
 753         }
 754
 755         if (a->generate_node_acls == 1 && flag == 0) {
 756                 pr_debug("Skipping cache_dynamic_acls=0 when"
 757                         " generate_node_acls=1\n");
 758                 return 0;
 759         }
 760
 761         a->cache_dynamic_acls = flag;
 762         pr_debug("iSCSI_TPG[%hu] - Cache Dynamic Initiator Portal Group"
 763                 " ACLs %s\n", tpg->tpgt, (a->cache_dynamic_acls) ?
 764                 "Enabled" : "Disabled");
 765
 766         return 0;
 767 }
 768
 769 int iscsit_ta_demo_mode_write_protect(
 770         struct iscsi_portal_group *tpg,
 771         u32 flag)
 772 {
 773         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 774
 775         if ((flag != 0) && (flag != 1)) {
 776                 pr_err("Illegal value %d\n", flag);
 777                 return -EINVAL;
 778         }
 779
 780         a->demo_mode_write_protect = flag;
 781         pr_debug("iSCSI_TPG[%hu] - Demo Mode Write Protect bit: %s\n",
 782                 tpg->tpgt, (a->demo_mode_write_protect) ? "ON" : "OFF");
 783
 784         return 0;
 785 }
 786
 787 int iscsit_ta_prod_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->prod_mode_write_protect = flag;
 799         pr_debug("iSCSI_TPG[%hu] - Production Mode Write Protect bit:"
 800                 " %s\n", tpg->tpgt, (a->prod_mode_write_protect) ?
 801                 "ON" : "OFF");
 802
 803         return 0;
 804 }
 805
 806 int iscsit_ta_demo_mode_discovery(
 807         struct iscsi_portal_group *tpg,
 808         u32 flag)
 809 {
 810         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 811
 812         if ((flag != 0) && (flag != 1)) {
 813                 pr_err("Illegal value %d\n", flag);
 814                 return -EINVAL;
 815         }
 816
 817         a->demo_mode_discovery = flag;
 818         pr_debug("iSCSI_TPG[%hu] - Demo Mode Discovery bit:"
 819                 " %s\n", tpg->tpgt, (a->demo_mode_discovery) ?
 820                 "ON" : "OFF");
 821
 822         return 0;
 823 }
 824
 825 int iscsit_ta_default_erl(
 826         struct iscsi_portal_group *tpg,
 827         u32 default_erl)
 828 {
 829         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 830
 831         if ((default_erl != 0) && (default_erl != 1) && (default_erl != 2)) {
 832                 pr_err("Illegal value for default_erl: %u\n", default_erl);
 833                 return -EINVAL;
 834         }
 835
 836         a->default_erl = default_erl;
 837         pr_debug("iSCSI_TPG[%hu] - DefaultERL: %u\n", tpg->tpgt, a->default_erl);
 838
 839         return 0;
 840 }
 841
 842 int iscsit_ta_t10_pi(
 843         struct iscsi_portal_group *tpg,
 844         u32 flag)
 845 {
 846         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 847
 848         if ((flag != 0) && (flag != 1)) {
 849                 pr_err("Illegal value %d\n", flag);
 850                 return -EINVAL;
 851         }
 852
 853         a->t10_pi = flag;
 854         pr_debug("iSCSI_TPG[%hu] - T10 Protection information bit:"
 855                 " %s\n", tpg->tpgt, (a->t10_pi) ?
 856                 "ON" : "OFF");
 857
 858         return 0;
 859 }
 860
 861 int iscsit_ta_fabric_prot_type(
 862         struct iscsi_portal_group *tpg,
 863         u32 prot_type)
 864 {
 865         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 866
 867         if ((prot_type != 0) && (prot_type != 1) && (prot_type != 3)) {
 868                 pr_err("Illegal value for fabric_prot_type: %u\n", prot_type);
 869                 return -EINVAL;
 870         }
 871
 872         a->fabric_prot_type = prot_type;
 873         pr_debug("iSCSI_TPG[%hu] - T10 Fabric Protection Type: %u\n",
 874                  tpg->tpgt, prot_type);
 875
 876         return 0;
 877 }
 878
 879 int iscsit_ta_tpg_enabled_sendtargets(
 880         struct iscsi_portal_group *tpg,
 881         u32 flag)
 882 {
 883         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 884
 885         if ((flag != 0) && (flag != 1)) {
 886                 pr_err("Illegal value %d\n", flag);
 887                 return -EINVAL;
 888         }
 889
 890         a->tpg_enabled_sendtargets = flag;
 891         pr_debug("iSCSI_TPG[%hu] - TPG enabled bit required for SendTargets:"
 892                 " %s\n", tpg->tpgt, (a->tpg_enabled_sendtargets) ? "ON" : "OFF");
 893
 894         return 0;
 895 }
 896
 897 int iscsit_ta_login_keys_workaround(
 898         struct iscsi_portal_group *tpg,
 899         u32 flag)
 900 {
 901         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 902
 903         if ((flag != 0) && (flag != 1)) {
 904                 pr_err("Illegal value %d\n", flag);
 905                 return -EINVAL;
 906         }
 907
 908         a->login_keys_workaround = flag;
 909         pr_debug("iSCSI_TPG[%hu] - TPG enabled bit for login keys workaround: %s ",
 910                 tpg->tpgt, (a->login_keys_workaround) ? "ON" : "OFF");
 911
 912         return 0;
 913 }