drivers/target/iscsi/iscsi_target_tpg.c

   1 /*******************************************************************************
   2  * This file contains iSCSI Target Portal Group related functions.
   3  *
   4  * (c) Copyright 2007-2013 Datera, Inc.
   5  *
   6  * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  ******************************************************************************/
  18
  19 #include <target/target_core_base.h>
  20 #include <target/target_core_fabric.h>
  21 #include <target/target_core_configfs.h>
  22
  23 #include "iscsi_target_core.h"
  24 #include "iscsi_target_erl0.h"
  25 #include "iscsi_target_login.h"
  26 #include "iscsi_target_nodeattrib.h"
  27 #include "iscsi_target_tpg.h"
  28 #include "iscsi_target_util.h"
  29 #include "iscsi_target.h"
  30 #include "iscsi_target_parameters.h"
  31
  32 #include <target/iscsi/iscsi_transport.h>
  33
  34 struct iscsi_portal_group *iscsit_alloc_portal_group(struct iscsi_tiqn *tiqn, u16 tpgt)
  35 {
  36         struct iscsi_portal_group *tpg;
  37
  38         tpg = kzalloc(sizeof(struct iscsi_portal_group), GFP_KERNEL);
  39         if (!tpg) {
  40                 pr_err("Unable to allocate struct iscsi_portal_group\n");
  41                 return NULL;
  42         }
  43
  44         tpg->tpgt = tpgt;
  45         tpg->tpg_state = TPG_STATE_FREE;
  46         tpg->tpg_tiqn = tiqn;
  47         INIT_LIST_HEAD(&tpg->tpg_gnp_list);
  48         INIT_LIST_HEAD(&tpg->tpg_list);
  49         mutex_init(&tpg->tpg_access_lock);
  50         sema_init(&tpg->np_login_sem, 1);
  51         spin_lock_init(&tpg->tpg_state_lock);
  52         spin_lock_init(&tpg->tpg_np_lock);
  53
  54         return tpg;
  55 }
  56
  57 static void iscsit_set_default_tpg_attribs(struct iscsi_portal_group *);
  58
  59 int iscsit_load_discovery_tpg(void)
  60 {
  61         struct iscsi_param *param;
  62         struct iscsi_portal_group *tpg;
  63         int ret;
  64
  65         tpg = iscsit_alloc_portal_group(NULL, 1);
  66         if (!tpg) {
  67                 pr_err("Unable to allocate struct iscsi_portal_group\n");
  68                 return -1;
  69         }
  70
  71         ret = core_tpg_register(
  72                         &lio_target_fabric_configfs->tf_ops,
  73                         NULL, &tpg->tpg_se_tpg, tpg,
  74                         TRANSPORT_TPG_TYPE_DISCOVERY);
  75         if (ret < 0) {
  76                 kfree(tpg);
  77                 return -1;
  78         }
  79
  80         tpg->sid = 1; /* First Assigned LIO Session ID */
  81         iscsit_set_default_tpg_attribs(tpg);
  82
  83         if (iscsi_create_default_params(&tpg->param_list) < 0)
  84                 goto out;
  85         /*
  86          * By default we disable authentication for discovery sessions,
  87          * this can be changed with:
  88          *
  89          * /sys/kernel/config/target/iscsi/discovery_auth/enforce_discovery_auth
  90          */
  91         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
  92         if (!param)
  93                 goto out;
  94
  95         if (iscsi_update_param_value(param, "CHAP,None") < 0)
  96                 goto out;
  97
  98         tpg->tpg_attrib.authentication = 0;
  99
 100         spin_lock(&tpg->tpg_state_lock);
 101         tpg->tpg_state  = TPG_STATE_ACTIVE;
 102         spin_unlock(&tpg->tpg_state_lock);
 103
 104         iscsit_global->discovery_tpg = tpg;
 105         pr_debug("CORE[0] - Allocated Discovery TPG\n");
 106
 107         return 0;
 108 out:
 109         if (tpg->sid == 1)
 110                 core_tpg_deregister(&tpg->tpg_se_tpg);
 111         kfree(tpg);
 112         return -1;
 113 }
 114
 115 void iscsit_release_discovery_tpg(void)
 116 {
 117         struct iscsi_portal_group *tpg = iscsit_global->discovery_tpg;
 118
 119         if (!tpg)
 120                 return;
 121
 122         core_tpg_deregister(&tpg->tpg_se_tpg);
 123
 124         kfree(tpg);
 125         iscsit_global->discovery_tpg = NULL;
 126 }
 127
 128 struct iscsi_portal_group *iscsit_get_tpg_from_np(
 129         struct iscsi_tiqn *tiqn,
 130         struct iscsi_np *np,
 131         struct iscsi_tpg_np **tpg_np_out)
 132 {
 133         struct iscsi_portal_group *tpg = NULL;
 134         struct iscsi_tpg_np *tpg_np;
 135
 136         spin_lock(&tiqn->tiqn_tpg_lock);
 137         list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) {
 138
 139                 spin_lock(&tpg->tpg_state_lock);
 140                 if (tpg->tpg_state == TPG_STATE_FREE) {
 141                         spin_unlock(&tpg->tpg_state_lock);
 142                         continue;
 143                 }
 144                 spin_unlock(&tpg->tpg_state_lock);
 145
 146                 spin_lock(&tpg->tpg_np_lock);
 147                 list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
 148                         if (tpg_np->tpg_np == np) {
 149                                 *tpg_np_out = tpg_np;
 150                                 kref_get(&tpg_np->tpg_np_kref);
 151                                 spin_unlock(&tpg->tpg_np_lock);
 152                                 spin_unlock(&tiqn->tiqn_tpg_lock);
 153                                 return tpg;
 154                         }
 155                 }
 156                 spin_unlock(&tpg->tpg_np_lock);
 157         }
 158         spin_unlock(&tiqn->tiqn_tpg_lock);
 159
 160         return NULL;
 161 }
 162
 163 int iscsit_get_tpg(
 164         struct iscsi_portal_group *tpg)
 165 {
 166         int ret;
 167
 168         ret = mutex_lock_interruptible(&tpg->tpg_access_lock);
 169         return ((ret != 0) || signal_pending(current)) ? -1 : 0;
 170 }
 171
 172 void iscsit_put_tpg(struct iscsi_portal_group *tpg)
 173 {
 174         mutex_unlock(&tpg->tpg_access_lock);
 175 }
 176
 177 static void iscsit_clear_tpg_np_login_thread(
 178         struct iscsi_tpg_np *tpg_np,
 179         struct iscsi_portal_group *tpg,
 180         bool shutdown)
 181 {
 182         if (!tpg_np->tpg_np) {
 183                 pr_err("struct iscsi_tpg_np->tpg_np is NULL!\n");
 184                 return;
 185         }
 186
 187         iscsit_reset_np_thread(tpg_np->tpg_np, tpg_np, tpg, shutdown);
 188 }
 189
 190 void iscsit_clear_tpg_np_login_threads(
 191         struct iscsi_portal_group *tpg,
 192         bool shutdown)
 193 {
 194         struct iscsi_tpg_np *tpg_np;
 195
 196         spin_lock(&tpg->tpg_np_lock);
 197         list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
 198                 if (!tpg_np->tpg_np) {
 199                         pr_err("struct iscsi_tpg_np->tpg_np is NULL!\n");
 200                         continue;
 201                 }
 202                 spin_unlock(&tpg->tpg_np_lock);
 203                 iscsit_clear_tpg_np_login_thread(tpg_np, tpg, shutdown);
 204                 spin_lock(&tpg->tpg_np_lock);
 205         }
 206         spin_unlock(&tpg->tpg_np_lock);
 207 }
 208
 209 void iscsit_tpg_dump_params(struct iscsi_portal_group *tpg)
 210 {
 211         iscsi_print_params(tpg->param_list);
 212 }
 213
 214 static void iscsit_set_default_tpg_attribs(struct iscsi_portal_group *tpg)
 215 {
 216         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 217
 218         a->authentication = TA_AUTHENTICATION;
 219         a->login_timeout = TA_LOGIN_TIMEOUT;
 220         a->netif_timeout = TA_NETIF_TIMEOUT;
 221         a->default_cmdsn_depth = TA_DEFAULT_CMDSN_DEPTH;
 222         a->generate_node_acls = TA_GENERATE_NODE_ACLS;
 223         a->cache_dynamic_acls = TA_CACHE_DYNAMIC_ACLS;
 224         a->demo_mode_write_protect = TA_DEMO_MODE_WRITE_PROTECT;
 225         a->prod_mode_write_protect = TA_PROD_MODE_WRITE_PROTECT;
 226         a->demo_mode_discovery = TA_DEMO_MODE_DISCOVERY;
 227 }
 228
 229 int iscsit_tpg_add_portal_group(struct iscsi_tiqn *tiqn, struct iscsi_portal_group *tpg)
 230 {
 231         if (tpg->tpg_state != TPG_STATE_FREE) {
 232                 pr_err("Unable to add iSCSI Target Portal Group: %d"
 233                         " while not in TPG_STATE_FREE state.\n", tpg->tpgt);
 234                 return -EEXIST;
 235         }
 236         iscsit_set_default_tpg_attribs(tpg);
 237
 238         if (iscsi_create_default_params(&tpg->param_list) < 0)
 239                 goto err_out;
 240
 241         tpg->tpg_attrib.tpg = tpg;
 242
 243         spin_lock(&tpg->tpg_state_lock);
 244         tpg->tpg_state  = TPG_STATE_INACTIVE;
 245         spin_unlock(&tpg->tpg_state_lock);
 246
 247         spin_lock(&tiqn->tiqn_tpg_lock);
 248         list_add_tail(&tpg->tpg_list, &tiqn->tiqn_tpg_list);
 249         tiqn->tiqn_ntpgs++;
 250         pr_debug("CORE[%s]_TPG[%hu] - Added iSCSI Target Portal Group\n",
 251                         tiqn->tiqn, tpg->tpgt);
 252         spin_unlock(&tiqn->tiqn_tpg_lock);
 253
 254         return 0;
 255 err_out:
 256         if (tpg->param_list) {
 257                 iscsi_release_param_list(tpg->param_list);
 258                 tpg->param_list = NULL;
 259         }
 260         kfree(tpg);
 261         return -ENOMEM;
 262 }
 263
 264 int iscsit_tpg_del_portal_group(
 265         struct iscsi_tiqn *tiqn,
 266         struct iscsi_portal_group *tpg,
 267         int force)
 268 {
 269         u8 old_state = tpg->tpg_state;
 270
 271         spin_lock(&tpg->tpg_state_lock);
 272         tpg->tpg_state = TPG_STATE_INACTIVE;
 273         spin_unlock(&tpg->tpg_state_lock);
 274
 275         iscsit_clear_tpg_np_login_threads(tpg, true);
 276
 277         if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
 278                 pr_err("Unable to delete iSCSI Target Portal Group:"
 279                         " %hu while active sessions exist, and force=0\n",
 280                         tpg->tpgt);
 281                 tpg->tpg_state = old_state;
 282                 return -EPERM;
 283         }
 284
 285         core_tpg_clear_object_luns(&tpg->tpg_se_tpg);
 286
 287         if (tpg->param_list) {
 288                 iscsi_release_param_list(tpg->param_list);
 289                 tpg->param_list = NULL;
 290         }
 291
 292         core_tpg_deregister(&tpg->tpg_se_tpg);
 293
 294         spin_lock(&tpg->tpg_state_lock);
 295         tpg->tpg_state = TPG_STATE_FREE;
 296         spin_unlock(&tpg->tpg_state_lock);
 297
 298         spin_lock(&tiqn->tiqn_tpg_lock);
 299         tiqn->tiqn_ntpgs--;
 300         list_del(&tpg->tpg_list);
 301         spin_unlock(&tiqn->tiqn_tpg_lock);
 302
 303         pr_debug("CORE[%s]_TPG[%hu] - Deleted iSCSI Target Portal Group\n",
 304                         tiqn->tiqn, tpg->tpgt);
 305
 306         kfree(tpg);
 307         return 0;
 308 }
 309
 310 int iscsit_tpg_enable_portal_group(struct iscsi_portal_group *tpg)
 311 {
 312         struct iscsi_param *param;
 313         struct iscsi_tiqn *tiqn = tpg->tpg_tiqn;
 314         int ret;
 315
 316         spin_lock(&tpg->tpg_state_lock);
 317         if (tpg->tpg_state == TPG_STATE_ACTIVE) {
 318                 pr_err("iSCSI target portal group: %hu is already"
 319                         " active, ignoring request.\n", tpg->tpgt);
 320                 spin_unlock(&tpg->tpg_state_lock);
 321                 return -EINVAL;
 322         }
 323         /*
 324          * Make sure that AuthMethod does not contain None as an option
 325          * unless explictly disabled.  Set the default to CHAP if authentication
 326          * is enforced (as per default), and remove the NONE option.
 327          */
 328         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
 329         if (!param) {
 330                 spin_unlock(&tpg->tpg_state_lock);
 331                 return -EINVAL;
 332         }
 333
 334         if (tpg->tpg_attrib.authentication) {
 335                 if (!strcmp(param->value, NONE)) {
 336                         ret = iscsi_update_param_value(param, CHAP);
 337                         if (ret)
 338                                 goto err;
 339                 }
 340
 341                 ret = iscsit_ta_authentication(tpg, 1);
 342                 if (ret < 0)
 343                         goto err;
 344         }
 345
 346         tpg->tpg_state = TPG_STATE_ACTIVE;
 347         spin_unlock(&tpg->tpg_state_lock);
 348
 349         spin_lock(&tiqn->tiqn_tpg_lock);
 350         tiqn->tiqn_active_tpgs++;
 351         pr_debug("iSCSI_TPG[%hu] - Enabled iSCSI Target Portal Group\n",
 352                         tpg->tpgt);
 353         spin_unlock(&tiqn->tiqn_tpg_lock);
 354
 355         return 0;
 356
 357 err:
 358         spin_unlock(&tpg->tpg_state_lock);
 359         return ret;
 360 }
 361
 362 int iscsit_tpg_disable_portal_group(struct iscsi_portal_group *tpg, int force)
 363 {
 364         struct iscsi_tiqn *tiqn;
 365         u8 old_state = tpg->tpg_state;
 366
 367         spin_lock(&tpg->tpg_state_lock);
 368         if (tpg->tpg_state == TPG_STATE_INACTIVE) {
 369                 pr_err("iSCSI Target Portal Group: %hu is already"
 370                         " inactive, ignoring request.\n", tpg->tpgt);
 371                 spin_unlock(&tpg->tpg_state_lock);
 372                 return -EINVAL;
 373         }
 374         tpg->tpg_state = TPG_STATE_INACTIVE;
 375         spin_unlock(&tpg->tpg_state_lock);
 376
 377         iscsit_clear_tpg_np_login_threads(tpg, false);
 378
 379         if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
 380                 spin_lock(&tpg->tpg_state_lock);
 381                 tpg->tpg_state = old_state;
 382                 spin_unlock(&tpg->tpg_state_lock);
 383                 pr_err("Unable to disable iSCSI Target Portal Group:"
 384                         " %hu while active sessions exist, and force=0\n",
 385                         tpg->tpgt);
 386                 return -EPERM;
 387         }
 388
 389         tiqn = tpg->tpg_tiqn;
 390         if (!tiqn || (tpg == iscsit_global->discovery_tpg))
 391                 return 0;
 392
 393         spin_lock(&tiqn->tiqn_tpg_lock);
 394         tiqn->tiqn_active_tpgs--;
 395         pr_debug("iSCSI_TPG[%hu] - Disabled iSCSI Target Portal Group\n",
 396                         tpg->tpgt);
 397         spin_unlock(&tiqn->tiqn_tpg_lock);
 398
 399         return 0;
 400 }
 401
 402 struct iscsi_node_attrib *iscsit_tpg_get_node_attrib(
 403         struct iscsi_session *sess)
 404 {
 405         struct se_session *se_sess = sess->se_sess;
 406         struct se_node_acl *se_nacl = se_sess->se_node_acl;
 407         struct iscsi_node_acl *acl = container_of(se_nacl, struct iscsi_node_acl,
 408                                         se_node_acl);
 409
 410         return &acl->node_attrib;
 411 }
 412
 413 struct iscsi_tpg_np *iscsit_tpg_locate_child_np(
 414         struct iscsi_tpg_np *tpg_np,
 415         int network_transport)
 416 {
 417         struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
 418
 419         spin_lock(&tpg_np->tpg_np_parent_lock);
 420         list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
 421                         &tpg_np->tpg_np_parent_list, tpg_np_child_list) {
 422                 if (tpg_np_child->tpg_np->np_network_transport ==
 423                                 network_transport) {
 424                         spin_unlock(&tpg_np->tpg_np_parent_lock);
 425                         return tpg_np_child;
 426                 }
 427         }
 428         spin_unlock(&tpg_np->tpg_np_parent_lock);
 429
 430         return NULL;
 431 }
 432
 433 static bool iscsit_tpg_check_network_portal(
 434         struct iscsi_tiqn *tiqn,
 435         struct __kernel_sockaddr_storage *sockaddr,
 436         int network_transport)
 437 {
 438         struct iscsi_portal_group *tpg;
 439         struct iscsi_tpg_np *tpg_np;
 440         struct iscsi_np *np;
 441         bool match = false;
 442
 443         spin_lock(&tiqn->tiqn_tpg_lock);
 444         list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) {
 445
 446                 spin_lock(&tpg->tpg_np_lock);
 447                 list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
 448                         np = tpg_np->tpg_np;
 449
 450                         match = iscsit_check_np_match(sockaddr, np,
 451                                                 network_transport);
 452                         if (match == true)
 453                                 break;
 454                 }
 455                 spin_unlock(&tpg->tpg_np_lock);
 456         }
 457         spin_unlock(&tiqn->tiqn_tpg_lock);
 458
 459         return match;
 460 }
 461
 462 struct iscsi_tpg_np *iscsit_tpg_add_network_portal(
 463         struct iscsi_portal_group *tpg,
 464         struct __kernel_sockaddr_storage *sockaddr,
 465         char *ip_str,
 466         struct iscsi_tpg_np *tpg_np_parent,
 467         int network_transport)
 468 {
 469         struct iscsi_np *np;
 470         struct iscsi_tpg_np *tpg_np;
 471
 472         if (!tpg_np_parent) {
 473                 if (iscsit_tpg_check_network_portal(tpg->tpg_tiqn, sockaddr,
 474                                 network_transport) == true) {
 475                         pr_err("Network Portal: %s already exists on a"
 476                                 " different TPG on %s\n", ip_str,
 477                                 tpg->tpg_tiqn->tiqn);
 478                         return ERR_PTR(-EEXIST);
 479                 }
 480         }
 481
 482         tpg_np = kzalloc(sizeof(struct iscsi_tpg_np), GFP_KERNEL);
 483         if (!tpg_np) {
 484                 pr_err("Unable to allocate memory for"
 485                                 " struct iscsi_tpg_np.\n");
 486                 return ERR_PTR(-ENOMEM);
 487         }
 488
 489         np = iscsit_add_np(sockaddr, ip_str, network_transport);
 490         if (IS_ERR(np)) {
 491                 kfree(tpg_np);
 492                 return ERR_CAST(np);
 493         }
 494
 495         INIT_LIST_HEAD(&tpg_np->tpg_np_list);
 496         INIT_LIST_HEAD(&tpg_np->tpg_np_child_list);
 497         INIT_LIST_HEAD(&tpg_np->tpg_np_parent_list);
 498         spin_lock_init(&tpg_np->tpg_np_parent_lock);
 499         init_completion(&tpg_np->tpg_np_comp);
 500         kref_init(&tpg_np->tpg_np_kref);
 501         tpg_np->tpg_np          = np;
 502         tpg_np->tpg             = tpg;
 503
 504         spin_lock(&tpg->tpg_np_lock);
 505         list_add_tail(&tpg_np->tpg_np_list, &tpg->tpg_gnp_list);
 506         tpg->num_tpg_nps++;
 507         if (tpg->tpg_tiqn)
 508                 tpg->tpg_tiqn->tiqn_num_tpg_nps++;
 509         spin_unlock(&tpg->tpg_np_lock);
 510
 511         if (tpg_np_parent) {
 512                 tpg_np->tpg_np_parent = tpg_np_parent;
 513                 spin_lock(&tpg_np_parent->tpg_np_parent_lock);
 514                 list_add_tail(&tpg_np->tpg_np_child_list,
 515                         &tpg_np_parent->tpg_np_parent_list);
 516                 spin_unlock(&tpg_np_parent->tpg_np_parent_lock);
 517         }
 518
 519         pr_debug("CORE[%s] - Added Network Portal: %s:%hu,%hu on %s\n",
 520                 tpg->tpg_tiqn->tiqn, np->np_ip, np->np_port, tpg->tpgt,
 521                 np->np_transport->name);
 522
 523         return tpg_np;
 524 }
 525
 526 static int iscsit_tpg_release_np(
 527         struct iscsi_tpg_np *tpg_np,
 528         struct iscsi_portal_group *tpg,
 529         struct iscsi_np *np)
 530 {
 531         iscsit_clear_tpg_np_login_thread(tpg_np, tpg, true);
 532
 533         pr_debug("CORE[%s] - Removed Network Portal: %s:%hu,%hu on %s\n",
 534                 tpg->tpg_tiqn->tiqn, np->np_ip, np->np_port, tpg->tpgt,
 535                 np->np_transport->name);
 536
 537         tpg_np->tpg_np = NULL;
 538         tpg_np->tpg = NULL;
 539         kfree(tpg_np);
 540         /*
 541          * iscsit_del_np() will shutdown struct iscsi_np when last TPG reference is released.
 542          */
 543         return iscsit_del_np(np);
 544 }
 545
 546 int iscsit_tpg_del_network_portal(
 547         struct iscsi_portal_group *tpg,
 548         struct iscsi_tpg_np *tpg_np)
 549 {
 550         struct iscsi_np *np;
 551         struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
 552         int ret = 0;
 553
 554         np = tpg_np->tpg_np;
 555         if (!np) {
 556                 pr_err("Unable to locate struct iscsi_np from"
 557                                 " struct iscsi_tpg_np\n");
 558                 return -EINVAL;
 559         }
 560
 561         if (!tpg_np->tpg_np_parent) {
 562                 /*
 563                  * We are the parent tpg network portal.  Release all of the
 564                  * child tpg_np's (eg: the non ISCSI_TCP ones) on our parent
 565                  * list first.
 566                  */
 567                 list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
 568                                 &tpg_np->tpg_np_parent_list,
 569                                 tpg_np_child_list) {
 570                         ret = iscsit_tpg_del_network_portal(tpg, tpg_np_child);
 571                         if (ret < 0)
 572                                 pr_err("iscsit_tpg_del_network_portal()"
 573                                         " failed: %d\n", ret);
 574                 }
 575         } else {
 576                 /*
 577                  * We are not the parent ISCSI_TCP tpg network portal.  Release
 578                  * our own network portals from the child list.
 579                  */
 580                 spin_lock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
 581                 list_del(&tpg_np->tpg_np_child_list);
 582                 spin_unlock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
 583         }
 584
 585         spin_lock(&tpg->tpg_np_lock);
 586         list_del(&tpg_np->tpg_np_list);
 587         tpg->num_tpg_nps--;
 588         if (tpg->tpg_tiqn)
 589                 tpg->tpg_tiqn->tiqn_num_tpg_nps--;
 590         spin_unlock(&tpg->tpg_np_lock);
 591
 592         return iscsit_tpg_release_np(tpg_np, tpg, np);
 593 }
 594
 595 int iscsit_tpg_set_initiator_node_queue_depth(
 596         struct iscsi_portal_group *tpg,
 597         unsigned char *initiatorname,
 598         u32 queue_depth,
 599         int force)
 600 {
 601         return core_tpg_set_initiator_node_queue_depth(&tpg->tpg_se_tpg,
 602                 initiatorname, queue_depth, force);
 603 }
 604
 605 int iscsit_ta_authentication(struct iscsi_portal_group *tpg, u32 authentication)
 606 {
 607         unsigned char buf1[256], buf2[256], *none = NULL;
 608         int len;
 609         struct iscsi_param *param;
 610         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 611
 612         if ((authentication != 1) && (authentication != 0)) {
 613                 pr_err("Illegal value for authentication parameter:"
 614                         " %u, ignoring request.\n", authentication);
 615                 return -EINVAL;
 616         }
 617
 618         memset(buf1, 0, sizeof(buf1));
 619         memset(buf2, 0, sizeof(buf2));
 620
 621         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
 622         if (!param)
 623                 return -EINVAL;
 624
 625         if (authentication) {
 626                 snprintf(buf1, sizeof(buf1), "%s", param->value);
 627                 none = strstr(buf1, NONE);
 628                 if (!none)
 629                         goto out;
 630                 if (!strncmp(none + 4, ",", 1)) {
 631                         if (!strcmp(buf1, none))
 632                                 sprintf(buf2, "%s", none+5);
 633                         else {
 634                                 none--;
 635                                 *none = '\0';
 636                                 len = sprintf(buf2, "%s", buf1);
 637                                 none += 5;
 638                                 sprintf(buf2 + len, "%s", none);
 639                         }
 640                 } else {
 641                         none--;
 642                         *none = '\0';
 643                         sprintf(buf2, "%s", buf1);
 644                 }
 645                 if (iscsi_update_param_value(param, buf2) < 0)
 646                         return -EINVAL;
 647         } else {
 648                 snprintf(buf1, sizeof(buf1), "%s", param->value);
 649                 none = strstr(buf1, NONE);
 650                 if (none)
 651                         goto out;
 652                 strncat(buf1, ",", strlen(","));
 653                 strncat(buf1, NONE, strlen(NONE));
 654                 if (iscsi_update_param_value(param, buf1) < 0)
 655                         return -EINVAL;
 656         }
 657
 658 out:
 659         a->authentication = authentication;
 660         pr_debug("%s iSCSI Authentication Methods for TPG: %hu.\n",
 661                 a->authentication ? "Enforcing" : "Disabling", tpg->tpgt);
 662
 663         return 0;
 664 }
 665
 666 int iscsit_ta_login_timeout(
 667         struct iscsi_portal_group *tpg,
 668         u32 login_timeout)
 669 {
 670         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 671
 672         if (login_timeout > TA_LOGIN_TIMEOUT_MAX) {
 673                 pr_err("Requested Login Timeout %u larger than maximum"
 674                         " %u\n", login_timeout, TA_LOGIN_TIMEOUT_MAX);
 675                 return -EINVAL;
 676         } else if (login_timeout < TA_LOGIN_TIMEOUT_MIN) {
 677                 pr_err("Requested Logout Timeout %u smaller than"
 678                         " minimum %u\n", login_timeout, TA_LOGIN_TIMEOUT_MIN);
 679                 return -EINVAL;
 680         }
 681
 682         a->login_timeout = login_timeout;
 683         pr_debug("Set Logout Timeout to %u for Target Portal Group"
 684                 " %hu\n", a->login_timeout, tpg->tpgt);
 685
 686         return 0;
 687 }
 688
 689 int iscsit_ta_netif_timeout(
 690         struct iscsi_portal_group *tpg,
 691         u32 netif_timeout)
 692 {
 693         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 694
 695         if (netif_timeout > TA_NETIF_TIMEOUT_MAX) {
 696                 pr_err("Requested Network Interface Timeout %u larger"
 697                         " than maximum %u\n", netif_timeout,
 698                                 TA_NETIF_TIMEOUT_MAX);
 699                 return -EINVAL;
 700         } else if (netif_timeout < TA_NETIF_TIMEOUT_MIN) {
 701                 pr_err("Requested Network Interface Timeout %u smaller"
 702                         " than minimum %u\n", netif_timeout,
 703                                 TA_NETIF_TIMEOUT_MIN);
 704                 return -EINVAL;
 705         }
 706
 707         a->netif_timeout = netif_timeout;
 708         pr_debug("Set Network Interface Timeout to %u for"
 709                 " Target Portal Group %hu\n", a->netif_timeout, tpg->tpgt);
 710
 711         return 0;
 712 }
 713
 714 int iscsit_ta_generate_node_acls(
 715         struct iscsi_portal_group *tpg,
 716         u32 flag)
 717 {
 718         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 719
 720         if ((flag != 0) && (flag != 1)) {
 721                 pr_err("Illegal value %d\n", flag);
 722                 return -EINVAL;
 723         }
 724
 725         a->generate_node_acls = flag;
 726         pr_debug("iSCSI_TPG[%hu] - Generate Initiator Portal Group ACLs: %s\n",
 727                 tpg->tpgt, (a->generate_node_acls) ? "Enabled" : "Disabled");
 728
 729         if (flag == 1 && a->cache_dynamic_acls == 0) {
 730                 pr_debug("Explicitly setting cache_dynamic_acls=1 when "
 731                         "generate_node_acls=1\n");
 732                 a->cache_dynamic_acls = 1;
 733         }
 734
 735         return 0;
 736 }
 737
 738 int iscsit_ta_default_cmdsn_depth(
 739         struct iscsi_portal_group *tpg,
 740         u32 tcq_depth)
 741 {
 742         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 743
 744         if (tcq_depth > TA_DEFAULT_CMDSN_DEPTH_MAX) {
 745                 pr_err("Requested Default Queue Depth: %u larger"
 746                         " than maximum %u\n", tcq_depth,
 747                                 TA_DEFAULT_CMDSN_DEPTH_MAX);
 748                 return -EINVAL;
 749         } else if (tcq_depth < TA_DEFAULT_CMDSN_DEPTH_MIN) {
 750                 pr_err("Requested Default Queue Depth: %u smaller"
 751                         " than minimum %u\n", tcq_depth,
 752                                 TA_DEFAULT_CMDSN_DEPTH_MIN);
 753                 return -EINVAL;
 754         }
 755
 756         a->default_cmdsn_depth = tcq_depth;
 757         pr_debug("iSCSI_TPG[%hu] - Set Default CmdSN TCQ Depth to %u\n",
 758                 tpg->tpgt, a->default_cmdsn_depth);
 759
 760         return 0;
 761 }
 762
 763 int iscsit_ta_cache_dynamic_acls(
 764         struct iscsi_portal_group *tpg,
 765         u32 flag)
 766 {
 767         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 768
 769         if ((flag != 0) && (flag != 1)) {
 770                 pr_err("Illegal value %d\n", flag);
 771                 return -EINVAL;
 772         }
 773
 774         if (a->generate_node_acls == 1 && flag == 0) {
 775                 pr_debug("Skipping cache_dynamic_acls=0 when"
 776                         " generate_node_acls=1\n");
 777                 return 0;
 778         }
 779
 780         a->cache_dynamic_acls = flag;
 781         pr_debug("iSCSI_TPG[%hu] - Cache Dynamic Initiator Portal Group"
 782                 " ACLs %s\n", tpg->tpgt, (a->cache_dynamic_acls) ?
 783                 "Enabled" : "Disabled");
 784
 785         return 0;
 786 }
 787
 788 int iscsit_ta_demo_mode_write_protect(
 789         struct iscsi_portal_group *tpg,
 790         u32 flag)
 791 {
 792         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 793
 794         if ((flag != 0) && (flag != 1)) {
 795                 pr_err("Illegal value %d\n", flag);
 796                 return -EINVAL;
 797         }
 798
 799         a->demo_mode_write_protect = flag;
 800         pr_debug("iSCSI_TPG[%hu] - Demo Mode Write Protect bit: %s\n",
 801                 tpg->tpgt, (a->demo_mode_write_protect) ? "ON" : "OFF");
 802
 803         return 0;
 804 }
 805
 806 int iscsit_ta_prod_mode_write_protect(
 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->prod_mode_write_protect = flag;
 818         pr_debug("iSCSI_TPG[%hu] - Production Mode Write Protect bit:"
 819                 " %s\n", tpg->tpgt, (a->prod_mode_write_protect) ?
 820                 "ON" : "OFF");
 821
 822         return 0;
 823 }
 824
 825 int iscsit_ta_demo_mode_discovery(
 826         struct iscsi_portal_group *tpg,
 827         u32 flag)
 828 {
 829         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 830
 831         if ((flag != 0) && (flag != 1)) {
 832                 pr_err("Illegal value %d\n", flag);
 833                 return -EINVAL;
 834         }
 835
 836         a->demo_mode_discovery = flag;
 837         pr_debug("iSCSI_TPG[%hu] - Demo Mode Discovery bit:"
 838                 " %s\n", tpg->tpgt, (a->demo_mode_discovery) ?
 839                 "ON" : "OFF");
 840
 841         return 0;
 842 }