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 iscsit_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 = to_iscsi_nacl(se_nacl);
 398
 399         return &acl->node_attrib;
 400 }
 401
 402 struct iscsi_tpg_np *iscsit_tpg_locate_child_np(
 403         struct iscsi_tpg_np *tpg_np,
 404         int network_transport)
 405 {
 406         struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
 407
 408         spin_lock(&tpg_np->tpg_np_parent_lock);
 409         list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
 410                         &tpg_np->tpg_np_parent_list, tpg_np_child_list) {
 411                 if (tpg_np_child->tpg_np->np_network_transport ==
 412                                 network_transport) {
 413                         spin_unlock(&tpg_np->tpg_np_parent_lock);
 414                         return tpg_np_child;
 415                 }
 416         }
 417         spin_unlock(&tpg_np->tpg_np_parent_lock);
 418
 419         return NULL;
 420 }
 421
 422 static bool iscsit_tpg_check_network_portal(
 423         struct iscsi_tiqn *tiqn,
 424         struct sockaddr_storage *sockaddr,
 425         int network_transport)
 426 {
 427         struct iscsi_portal_group *tpg;
 428         struct iscsi_tpg_np *tpg_np;
 429         struct iscsi_np *np;
 430         bool match = false;
 431
 432         spin_lock(&tiqn->tiqn_tpg_lock);
 433         list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) {
 434
 435                 spin_lock(&tpg->tpg_np_lock);
 436                 list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
 437                         np = tpg_np->tpg_np;
 438
 439                         match = iscsit_check_np_match(sockaddr, np,
 440                                                 network_transport);
 441                         if (match)
 442                                 break;
 443                 }
 444                 spin_unlock(&tpg->tpg_np_lock);
 445
 446                 if (match)
 447                         break;
 448         }
 449         spin_unlock(&tiqn->tiqn_tpg_lock);
 450
 451         return match;
 452 }
 453
 454 struct iscsi_tpg_np *iscsit_tpg_add_network_portal(
 455         struct iscsi_portal_group *tpg,
 456         struct sockaddr_storage *sockaddr,
 457         struct iscsi_tpg_np *tpg_np_parent,
 458         int network_transport)
 459 {
 460         struct iscsi_np *np;
 461         struct iscsi_tpg_np *tpg_np;
 462
 463         if (!tpg_np_parent) {
 464                 if (iscsit_tpg_check_network_portal(tpg->tpg_tiqn, sockaddr,
 465                                 network_transport)) {
 466                         pr_err("Network Portal: %pISc already exists on a"
 467                                 " different TPG on %s\n", sockaddr,
 468                                 tpg->tpg_tiqn->tiqn);
 469                         return ERR_PTR(-EEXIST);
 470                 }
 471         }
 472
 473         tpg_np = kzalloc(sizeof(struct iscsi_tpg_np), GFP_KERNEL);
 474         if (!tpg_np) {
 475                 pr_err("Unable to allocate memory for"
 476                                 " struct iscsi_tpg_np.\n");
 477                 return ERR_PTR(-ENOMEM);
 478         }
 479
 480         np = iscsit_add_np(sockaddr, network_transport);
 481         if (IS_ERR(np)) {
 482                 kfree(tpg_np);
 483                 return ERR_CAST(np);
 484         }
 485
 486         INIT_LIST_HEAD(&tpg_np->tpg_np_list);
 487         INIT_LIST_HEAD(&tpg_np->tpg_np_child_list);
 488         INIT_LIST_HEAD(&tpg_np->tpg_np_parent_list);
 489         spin_lock_init(&tpg_np->tpg_np_parent_lock);
 490         init_completion(&tpg_np->tpg_np_comp);
 491         kref_init(&tpg_np->tpg_np_kref);
 492         tpg_np->tpg_np          = np;
 493         tpg_np->tpg             = tpg;
 494
 495         spin_lock(&tpg->tpg_np_lock);
 496         list_add_tail(&tpg_np->tpg_np_list, &tpg->tpg_gnp_list);
 497         tpg->num_tpg_nps++;
 498         if (tpg->tpg_tiqn)
 499                 tpg->tpg_tiqn->tiqn_num_tpg_nps++;
 500         spin_unlock(&tpg->tpg_np_lock);
 501
 502         if (tpg_np_parent) {
 503                 tpg_np->tpg_np_parent = tpg_np_parent;
 504                 spin_lock(&tpg_np_parent->tpg_np_parent_lock);
 505                 list_add_tail(&tpg_np->tpg_np_child_list,
 506                         &tpg_np_parent->tpg_np_parent_list);
 507                 spin_unlock(&tpg_np_parent->tpg_np_parent_lock);
 508         }
 509
 510         pr_debug("CORE[%s] - Added Network Portal: %pISpc,%hu on %s\n",
 511                 tpg->tpg_tiqn->tiqn, &np->np_sockaddr, tpg->tpgt,
 512                 np->np_transport->name);
 513
 514         return tpg_np;
 515 }
 516
 517 static int iscsit_tpg_release_np(
 518         struct iscsi_tpg_np *tpg_np,
 519         struct iscsi_portal_group *tpg,
 520         struct iscsi_np *np)
 521 {
 522         iscsit_clear_tpg_np_login_thread(tpg_np, tpg, true);
 523
 524         pr_debug("CORE[%s] - Removed Network Portal: %pISpc,%hu on %s\n",
 525                 tpg->tpg_tiqn->tiqn, &np->np_sockaddr, tpg->tpgt,
 526                 np->np_transport->name);
 527
 528         tpg_np->tpg_np = NULL;
 529         tpg_np->tpg = NULL;
 530         kfree(tpg_np);
 531         /*
 532          * iscsit_del_np() will shutdown struct iscsi_np when last TPG reference is released.
 533          */
 534         return iscsit_del_np(np);
 535 }
 536
 537 int iscsit_tpg_del_network_portal(
 538         struct iscsi_portal_group *tpg,
 539         struct iscsi_tpg_np *tpg_np)
 540 {
 541         struct iscsi_np *np;
 542         struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
 543         int ret = 0;
 544
 545         np = tpg_np->tpg_np;
 546         if (!np) {
 547                 pr_err("Unable to locate struct iscsi_np from"
 548                                 " struct iscsi_tpg_np\n");
 549                 return -EINVAL;
 550         }
 551
 552         if (!tpg_np->tpg_np_parent) {
 553                 /*
 554                  * We are the parent tpg network portal.  Release all of the
 555                  * child tpg_np's (eg: the non ISCSI_TCP ones) on our parent
 556                  * list first.
 557                  */
 558                 list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
 559                                 &tpg_np->tpg_np_parent_list,
 560                                 tpg_np_child_list) {
 561                         ret = iscsit_tpg_del_network_portal(tpg, tpg_np_child);
 562                         if (ret < 0)
 563                                 pr_err("iscsit_tpg_del_network_portal()"
 564                                         " failed: %d\n", ret);
 565                 }
 566         } else {
 567                 /*
 568                  * We are not the parent ISCSI_TCP tpg network portal.  Release
 569                  * our own network portals from the child list.
 570                  */
 571                 spin_lock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
 572                 list_del(&tpg_np->tpg_np_child_list);
 573                 spin_unlock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
 574         }
 575
 576         spin_lock(&tpg->tpg_np_lock);
 577         list_del(&tpg_np->tpg_np_list);
 578         tpg->num_tpg_nps--;
 579         if (tpg->tpg_tiqn)
 580                 tpg->tpg_tiqn->tiqn_num_tpg_nps--;
 581         spin_unlock(&tpg->tpg_np_lock);
 582
 583         return iscsit_tpg_release_np(tpg_np, tpg, np);
 584 }
 585
 586 int iscsit_ta_authentication(struct iscsi_portal_group *tpg, u32 authentication)
 587 {
 588         unsigned char buf1[256], buf2[256], *none = NULL;
 589         int len;
 590         struct iscsi_param *param;
 591         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 592
 593         if ((authentication != 1) && (authentication != 0)) {
 594                 pr_err("Illegal value for authentication parameter:"
 595                         " %u, ignoring request.\n", authentication);
 596                 return -EINVAL;
 597         }
 598
 599         memset(buf1, 0, sizeof(buf1));
 600         memset(buf2, 0, sizeof(buf2));
 601
 602         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
 603         if (!param)
 604                 return -EINVAL;
 605
 606         if (authentication) {
 607                 snprintf(buf1, sizeof(buf1), "%s", param->value);
 608                 none = strstr(buf1, NONE);
 609                 if (!none)
 610                         goto out;
 611                 if (!strncmp(none + 4, ",", 1)) {
 612                         if (!strcmp(buf1, none))
 613                                 sprintf(buf2, "%s", none+5);
 614                         else {
 615                                 none--;
 616                                 *none = '\0';
 617                                 len = sprintf(buf2, "%s", buf1);
 618                                 none += 5;
 619                                 sprintf(buf2 + len, "%s", none);
 620                         }
 621                 } else {
 622                         none--;
 623                         *none = '\0';
 624                         sprintf(buf2, "%s", buf1);
 625                 }
 626                 if (iscsi_update_param_value(param, buf2) < 0)
 627                         return -EINVAL;
 628         } else {
 629                 snprintf(buf1, sizeof(buf1), "%s", param->value);
 630                 none = strstr(buf1, NONE);
 631                 if (none)
 632                         goto out;
 633                 strlcat(buf1, "," NONE, sizeof(buf1));
 634                 if (iscsi_update_param_value(param, buf1) < 0)
 635                         return -EINVAL;
 636         }
 637
 638 out:
 639         a->authentication = authentication;
 640         pr_debug("%s iSCSI Authentication Methods for TPG: %hu.\n",
 641                 a->authentication ? "Enforcing" : "Disabling", tpg->tpgt);
 642
 643         return 0;
 644 }
 645
 646 int iscsit_ta_login_timeout(
 647         struct iscsi_portal_group *tpg,
 648         u32 login_timeout)
 649 {
 650         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 651
 652         if (login_timeout > TA_LOGIN_TIMEOUT_MAX) {
 653                 pr_err("Requested Login Timeout %u larger than maximum"
 654                         " %u\n", login_timeout, TA_LOGIN_TIMEOUT_MAX);
 655                 return -EINVAL;
 656         } else if (login_timeout < TA_LOGIN_TIMEOUT_MIN) {
 657                 pr_err("Requested Logout Timeout %u smaller than"
 658                         " minimum %u\n", login_timeout, TA_LOGIN_TIMEOUT_MIN);
 659                 return -EINVAL;
 660         }
 661
 662         a->login_timeout = login_timeout;
 663         pr_debug("Set Logout Timeout to %u for Target Portal Group"
 664                 " %hu\n", a->login_timeout, tpg->tpgt);
 665
 666         return 0;
 667 }
 668
 669 int iscsit_ta_netif_timeout(
 670         struct iscsi_portal_group *tpg,
 671         u32 netif_timeout)
 672 {
 673         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 674
 675         if (netif_timeout > TA_NETIF_TIMEOUT_MAX) {
 676                 pr_err("Requested Network Interface Timeout %u larger"
 677                         " than maximum %u\n", netif_timeout,
 678                                 TA_NETIF_TIMEOUT_MAX);
 679                 return -EINVAL;
 680         } else if (netif_timeout < TA_NETIF_TIMEOUT_MIN) {
 681                 pr_err("Requested Network Interface Timeout %u smaller"
 682                         " than minimum %u\n", netif_timeout,
 683                                 TA_NETIF_TIMEOUT_MIN);
 684                 return -EINVAL;
 685         }
 686
 687         a->netif_timeout = netif_timeout;
 688         pr_debug("Set Network Interface Timeout to %u for"
 689                 " Target Portal Group %hu\n", a->netif_timeout, tpg->tpgt);
 690
 691         return 0;
 692 }
 693
 694 int iscsit_ta_generate_node_acls(
 695         struct iscsi_portal_group *tpg,
 696         u32 flag)
 697 {
 698         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 699
 700         if ((flag != 0) && (flag != 1)) {
 701                 pr_err("Illegal value %d\n", flag);
 702                 return -EINVAL;
 703         }
 704
 705         a->generate_node_acls = flag;
 706         pr_debug("iSCSI_TPG[%hu] - Generate Initiator Portal Group ACLs: %s\n",
 707                 tpg->tpgt, (a->generate_node_acls) ? "Enabled" : "Disabled");
 708
 709         if (flag == 1 && a->cache_dynamic_acls == 0) {
 710                 pr_debug("Explicitly setting cache_dynamic_acls=1 when "
 711                         "generate_node_acls=1\n");
 712                 a->cache_dynamic_acls = 1;
 713         }
 714
 715         return 0;
 716 }
 717
 718 int iscsit_ta_default_cmdsn_depth(
 719         struct iscsi_portal_group *tpg,
 720         u32 tcq_depth)
 721 {
 722         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 723
 724         if (tcq_depth > TA_DEFAULT_CMDSN_DEPTH_MAX) {
 725                 pr_err("Requested Default Queue Depth: %u larger"
 726                         " than maximum %u\n", tcq_depth,
 727                                 TA_DEFAULT_CMDSN_DEPTH_MAX);
 728                 return -EINVAL;
 729         } else if (tcq_depth < TA_DEFAULT_CMDSN_DEPTH_MIN) {
 730                 pr_err("Requested Default Queue Depth: %u smaller"
 731                         " than minimum %u\n", tcq_depth,
 732                                 TA_DEFAULT_CMDSN_DEPTH_MIN);
 733                 return -EINVAL;
 734         }
 735
 736         a->default_cmdsn_depth = tcq_depth;
 737         pr_debug("iSCSI_TPG[%hu] - Set Default CmdSN TCQ Depth to %u\n",
 738                 tpg->tpgt, a->default_cmdsn_depth);
 739
 740         return 0;
 741 }
 742
 743 int iscsit_ta_cache_dynamic_acls(
 744         struct iscsi_portal_group *tpg,
 745         u32 flag)
 746 {
 747         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 748
 749         if ((flag != 0) && (flag != 1)) {
 750                 pr_err("Illegal value %d\n", flag);
 751                 return -EINVAL;
 752         }
 753
 754         if (a->generate_node_acls == 1 && flag == 0) {
 755                 pr_debug("Skipping cache_dynamic_acls=0 when"
 756                         " generate_node_acls=1\n");
 757                 return 0;
 758         }
 759
 760         a->cache_dynamic_acls = flag;
 761         pr_debug("iSCSI_TPG[%hu] - Cache Dynamic Initiator Portal Group"
 762                 " ACLs %s\n", tpg->tpgt, (a->cache_dynamic_acls) ?
 763                 "Enabled" : "Disabled");
 764
 765         return 0;
 766 }
 767
 768 int iscsit_ta_demo_mode_write_protect(
 769         struct iscsi_portal_group *tpg,
 770         u32 flag)
 771 {
 772         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 773
 774         if ((flag != 0) && (flag != 1)) {
 775                 pr_err("Illegal value %d\n", flag);
 776                 return -EINVAL;
 777         }
 778
 779         a->demo_mode_write_protect = flag;
 780         pr_debug("iSCSI_TPG[%hu] - Demo Mode Write Protect bit: %s\n",
 781                 tpg->tpgt, (a->demo_mode_write_protect) ? "ON" : "OFF");
 782
 783         return 0;
 784 }
 785
 786 int iscsit_ta_prod_mode_write_protect(
 787         struct iscsi_portal_group *tpg,
 788         u32 flag)
 789 {
 790         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 791
 792         if ((flag != 0) && (flag != 1)) {
 793                 pr_err("Illegal value %d\n", flag);
 794                 return -EINVAL;
 795         }
 796
 797         a->prod_mode_write_protect = flag;
 798         pr_debug("iSCSI_TPG[%hu] - Production Mode Write Protect bit:"
 799                 " %s\n", tpg->tpgt, (a->prod_mode_write_protect) ?
 800                 "ON" : "OFF");
 801
 802         return 0;
 803 }
 804
 805 int iscsit_ta_demo_mode_discovery(
 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->demo_mode_discovery = flag;
 817         pr_debug("iSCSI_TPG[%hu] - Demo Mode Discovery bit:"
 818                 " %s\n", tpg->tpgt, (a->demo_mode_discovery) ?
 819                 "ON" : "OFF");
 820
 821         return 0;
 822 }
 823
 824 int iscsit_ta_default_erl(
 825         struct iscsi_portal_group *tpg,
 826         u32 default_erl)
 827 {
 828         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 829
 830         if ((default_erl != 0) && (default_erl != 1) && (default_erl != 2)) {
 831                 pr_err("Illegal value for default_erl: %u\n", default_erl);
 832                 return -EINVAL;
 833         }
 834
 835         a->default_erl = default_erl;
 836         pr_debug("iSCSI_TPG[%hu] - DefaultERL: %u\n", tpg->tpgt, a->default_erl);
 837
 838         return 0;
 839 }
 840
 841 int iscsit_ta_t10_pi(
 842         struct iscsi_portal_group *tpg,
 843         u32 flag)
 844 {
 845         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 846
 847         if ((flag != 0) && (flag != 1)) {
 848                 pr_err("Illegal value %d\n", flag);
 849                 return -EINVAL;
 850         }
 851
 852         a->t10_pi = flag;
 853         pr_debug("iSCSI_TPG[%hu] - T10 Protection information bit:"
 854                 " %s\n", tpg->tpgt, (a->t10_pi) ?
 855                 "ON" : "OFF");
 856
 857         return 0;
 858 }
 859
 860 int iscsit_ta_fabric_prot_type(
 861         struct iscsi_portal_group *tpg,
 862         u32 prot_type)
 863 {
 864         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 865
 866         if ((prot_type != 0) && (prot_type != 1) && (prot_type != 3)) {
 867                 pr_err("Illegal value for fabric_prot_type: %u\n", prot_type);
 868                 return -EINVAL;
 869         }
 870
 871         a->fabric_prot_type = prot_type;
 872         pr_debug("iSCSI_TPG[%hu] - T10 Fabric Protection Type: %u\n",
 873                  tpg->tpgt, prot_type);
 874
 875         return 0;
 876 }
 877
 878 int iscsit_ta_tpg_enabled_sendtargets(
 879         struct iscsi_portal_group *tpg,
 880         u32 flag)
 881 {
 882         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 883
 884         if ((flag != 0) && (flag != 1)) {
 885                 pr_err("Illegal value %d\n", flag);
 886                 return -EINVAL;
 887         }
 888
 889         a->tpg_enabled_sendtargets = flag;
 890         pr_debug("iSCSI_TPG[%hu] - TPG enabled bit required for SendTargets:"
 891                 " %s\n", tpg->tpgt, (a->tpg_enabled_sendtargets) ? "ON" : "OFF");
 892
 893         return 0;
 894 }
 895
 896 int iscsit_ta_login_keys_workaround(
 897         struct iscsi_portal_group *tpg,
 898         u32 flag)
 899 {
 900         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 901
 902         if ((flag != 0) && (flag != 1)) {
 903                 pr_err("Illegal value %d\n", flag);
 904                 return -EINVAL;
 905         }
 906
 907         a->login_keys_workaround = flag;
 908         pr_debug("iSCSI_TPG[%hu] - TPG enabled bit for login keys workaround: %s ",
 909                 tpg->tpgt, (a->login_keys_workaround) ? "ON" : "OFF");
 910
 911         return 0;
 912 }