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_ACTIVE) {
 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         a->default_erl = TA_DEFAULT_ERL;
 228         a->t10_pi = TA_DEFAULT_T10_PI;
 229 }
 230
 231 int iscsit_tpg_add_portal_group(struct iscsi_tiqn *tiqn, struct iscsi_portal_group *tpg)
 232 {
 233         if (tpg->tpg_state != TPG_STATE_FREE) {
 234                 pr_err("Unable to add iSCSI Target Portal Group: %d"
 235                         " while not in TPG_STATE_FREE state.\n", tpg->tpgt);
 236                 return -EEXIST;
 237         }
 238         iscsit_set_default_tpg_attribs(tpg);
 239
 240         if (iscsi_create_default_params(&tpg->param_list) < 0)
 241                 goto err_out;
 242
 243         tpg->tpg_attrib.tpg = tpg;
 244
 245         spin_lock(&tpg->tpg_state_lock);
 246         tpg->tpg_state  = TPG_STATE_INACTIVE;
 247         spin_unlock(&tpg->tpg_state_lock);
 248
 249         spin_lock(&tiqn->tiqn_tpg_lock);
 250         list_add_tail(&tpg->tpg_list, &tiqn->tiqn_tpg_list);
 251         tiqn->tiqn_ntpgs++;
 252         pr_debug("CORE[%s]_TPG[%hu] - Added iSCSI Target Portal Group\n",
 253                         tiqn->tiqn, tpg->tpgt);
 254         spin_unlock(&tiqn->tiqn_tpg_lock);
 255
 256         return 0;
 257 err_out:
 258         if (tpg->param_list) {
 259                 iscsi_release_param_list(tpg->param_list);
 260                 tpg->param_list = NULL;
 261         }
 262         kfree(tpg);
 263         return -ENOMEM;
 264 }
 265
 266 int iscsit_tpg_del_portal_group(
 267         struct iscsi_tiqn *tiqn,
 268         struct iscsi_portal_group *tpg,
 269         int force)
 270 {
 271         u8 old_state = tpg->tpg_state;
 272
 273         spin_lock(&tpg->tpg_state_lock);
 274         tpg->tpg_state = TPG_STATE_INACTIVE;
 275         spin_unlock(&tpg->tpg_state_lock);
 276
 277         iscsit_clear_tpg_np_login_threads(tpg, true);
 278
 279         if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
 280                 pr_err("Unable to delete iSCSI Target Portal Group:"
 281                         " %hu while active sessions exist, and force=0\n",
 282                         tpg->tpgt);
 283                 tpg->tpg_state = old_state;
 284                 return -EPERM;
 285         }
 286
 287         core_tpg_clear_object_luns(&tpg->tpg_se_tpg);
 288
 289         if (tpg->param_list) {
 290                 iscsi_release_param_list(tpg->param_list);
 291                 tpg->param_list = NULL;
 292         }
 293
 294         core_tpg_deregister(&tpg->tpg_se_tpg);
 295
 296         spin_lock(&tpg->tpg_state_lock);
 297         tpg->tpg_state = TPG_STATE_FREE;
 298         spin_unlock(&tpg->tpg_state_lock);
 299
 300         spin_lock(&tiqn->tiqn_tpg_lock);
 301         tiqn->tiqn_ntpgs--;
 302         list_del(&tpg->tpg_list);
 303         spin_unlock(&tiqn->tiqn_tpg_lock);
 304
 305         pr_debug("CORE[%s]_TPG[%hu] - Deleted iSCSI Target Portal Group\n",
 306                         tiqn->tiqn, tpg->tpgt);
 307
 308         kfree(tpg);
 309         return 0;
 310 }
 311
 312 int iscsit_tpg_enable_portal_group(struct iscsi_portal_group *tpg)
 313 {
 314         struct iscsi_param *param;
 315         struct iscsi_tiqn *tiqn = tpg->tpg_tiqn;
 316         int ret;
 317
 318         spin_lock(&tpg->tpg_state_lock);
 319         if (tpg->tpg_state == TPG_STATE_ACTIVE) {
 320                 pr_err("iSCSI target portal group: %hu is already"
 321                         " active, ignoring request.\n", tpg->tpgt);
 322                 spin_unlock(&tpg->tpg_state_lock);
 323                 return -EINVAL;
 324         }
 325         /*
 326          * Make sure that AuthMethod does not contain None as an option
 327          * unless explictly disabled.  Set the default to CHAP if authentication
 328          * is enforced (as per default), and remove the NONE option.
 329          */
 330         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
 331         if (!param) {
 332                 spin_unlock(&tpg->tpg_state_lock);
 333                 return -EINVAL;
 334         }
 335
 336         if (tpg->tpg_attrib.authentication) {
 337                 if (!strcmp(param->value, NONE)) {
 338                         ret = iscsi_update_param_value(param, CHAP);
 339                         if (ret)
 340                                 goto err;
 341                 }
 342
 343                 ret = iscsit_ta_authentication(tpg, 1);
 344                 if (ret < 0)
 345                         goto err;
 346         }
 347
 348         tpg->tpg_state = TPG_STATE_ACTIVE;
 349         spin_unlock(&tpg->tpg_state_lock);
 350
 351         spin_lock(&tiqn->tiqn_tpg_lock);
 352         tiqn->tiqn_active_tpgs++;
 353         pr_debug("iSCSI_TPG[%hu] - Enabled iSCSI Target Portal Group\n",
 354                         tpg->tpgt);
 355         spin_unlock(&tiqn->tiqn_tpg_lock);
 356
 357         return 0;
 358
 359 err:
 360         spin_unlock(&tpg->tpg_state_lock);
 361         return ret;
 362 }
 363
 364 int iscsit_tpg_disable_portal_group(struct iscsi_portal_group *tpg, int force)
 365 {
 366         struct iscsi_tiqn *tiqn;
 367         u8 old_state = tpg->tpg_state;
 368
 369         spin_lock(&tpg->tpg_state_lock);
 370         if (tpg->tpg_state == TPG_STATE_INACTIVE) {
 371                 pr_err("iSCSI Target Portal Group: %hu is already"
 372                         " inactive, ignoring request.\n", tpg->tpgt);
 373                 spin_unlock(&tpg->tpg_state_lock);
 374                 return -EINVAL;
 375         }
 376         tpg->tpg_state = TPG_STATE_INACTIVE;
 377         spin_unlock(&tpg->tpg_state_lock);
 378
 379         iscsit_clear_tpg_np_login_threads(tpg, false);
 380
 381         if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
 382                 spin_lock(&tpg->tpg_state_lock);
 383                 tpg->tpg_state = old_state;
 384                 spin_unlock(&tpg->tpg_state_lock);
 385                 pr_err("Unable to disable iSCSI Target Portal Group:"
 386                         " %hu while active sessions exist, and force=0\n",
 387                         tpg->tpgt);
 388                 return -EPERM;
 389         }
 390
 391         tiqn = tpg->tpg_tiqn;
 392         if (!tiqn || (tpg == iscsit_global->discovery_tpg))
 393                 return 0;
 394
 395         spin_lock(&tiqn->tiqn_tpg_lock);
 396         tiqn->tiqn_active_tpgs--;
 397         pr_debug("iSCSI_TPG[%hu] - Disabled iSCSI Target Portal Group\n",
 398                         tpg->tpgt);
 399         spin_unlock(&tiqn->tiqn_tpg_lock);
 400
 401         return 0;
 402 }
 403
 404 struct iscsi_node_attrib *iscsit_tpg_get_node_attrib(
 405         struct iscsi_session *sess)
 406 {
 407         struct se_session *se_sess = sess->se_sess;
 408         struct se_node_acl *se_nacl = se_sess->se_node_acl;
 409         struct iscsi_node_acl *acl = container_of(se_nacl, struct iscsi_node_acl,
 410                                         se_node_acl);
 411
 412         return &acl->node_attrib;
 413 }
 414
 415 struct iscsi_tpg_np *iscsit_tpg_locate_child_np(
 416         struct iscsi_tpg_np *tpg_np,
 417         int network_transport)
 418 {
 419         struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
 420
 421         spin_lock(&tpg_np->tpg_np_parent_lock);
 422         list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
 423                         &tpg_np->tpg_np_parent_list, tpg_np_child_list) {
 424                 if (tpg_np_child->tpg_np->np_network_transport ==
 425                                 network_transport) {
 426                         spin_unlock(&tpg_np->tpg_np_parent_lock);
 427                         return tpg_np_child;
 428                 }
 429         }
 430         spin_unlock(&tpg_np->tpg_np_parent_lock);
 431
 432         return NULL;
 433 }
 434
 435 static bool iscsit_tpg_check_network_portal(
 436         struct iscsi_tiqn *tiqn,
 437         struct __kernel_sockaddr_storage *sockaddr,
 438         int network_transport)
 439 {
 440         struct iscsi_portal_group *tpg;
 441         struct iscsi_tpg_np *tpg_np;
 442         struct iscsi_np *np;
 443         bool match = false;
 444
 445         spin_lock(&tiqn->tiqn_tpg_lock);
 446         list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) {
 447
 448                 spin_lock(&tpg->tpg_np_lock);
 449                 list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
 450                         np = tpg_np->tpg_np;
 451
 452                         match = iscsit_check_np_match(sockaddr, np,
 453                                                 network_transport);
 454                         if (match == true)
 455                                 break;
 456                 }
 457                 spin_unlock(&tpg->tpg_np_lock);
 458         }
 459         spin_unlock(&tiqn->tiqn_tpg_lock);
 460
 461         return match;
 462 }
 463
 464 struct iscsi_tpg_np *iscsit_tpg_add_network_portal(
 465         struct iscsi_portal_group *tpg,
 466         struct __kernel_sockaddr_storage *sockaddr,
 467         char *ip_str,
 468         struct iscsi_tpg_np *tpg_np_parent,
 469         int network_transport)
 470 {
 471         struct iscsi_np *np;
 472         struct iscsi_tpg_np *tpg_np;
 473
 474         if (!tpg_np_parent) {
 475                 if (iscsit_tpg_check_network_portal(tpg->tpg_tiqn, sockaddr,
 476                                 network_transport) == true) {
 477                         pr_err("Network Portal: %s already exists on a"
 478                                 " different TPG on %s\n", ip_str,
 479                                 tpg->tpg_tiqn->tiqn);
 480                         return ERR_PTR(-EEXIST);
 481                 }
 482         }
 483
 484         tpg_np = kzalloc(sizeof(struct iscsi_tpg_np), GFP_KERNEL);
 485         if (!tpg_np) {
 486                 pr_err("Unable to allocate memory for"
 487                                 " struct iscsi_tpg_np.\n");
 488                 return ERR_PTR(-ENOMEM);
 489         }
 490
 491         np = iscsit_add_np(sockaddr, ip_str, network_transport);
 492         if (IS_ERR(np)) {
 493                 kfree(tpg_np);
 494                 return ERR_CAST(np);
 495         }
 496
 497         INIT_LIST_HEAD(&tpg_np->tpg_np_list);
 498         INIT_LIST_HEAD(&tpg_np->tpg_np_child_list);
 499         INIT_LIST_HEAD(&tpg_np->tpg_np_parent_list);
 500         spin_lock_init(&tpg_np->tpg_np_parent_lock);
 501         init_completion(&tpg_np->tpg_np_comp);
 502         kref_init(&tpg_np->tpg_np_kref);
 503         tpg_np->tpg_np          = np;
 504         np->tpg_np              = tpg_np;
 505         tpg_np->tpg             = tpg;
 506
 507         spin_lock(&tpg->tpg_np_lock);
 508         list_add_tail(&tpg_np->tpg_np_list, &tpg->tpg_gnp_list);
 509         tpg->num_tpg_nps++;
 510         if (tpg->tpg_tiqn)
 511                 tpg->tpg_tiqn->tiqn_num_tpg_nps++;
 512         spin_unlock(&tpg->tpg_np_lock);
 513
 514         if (tpg_np_parent) {
 515                 tpg_np->tpg_np_parent = tpg_np_parent;
 516                 spin_lock(&tpg_np_parent->tpg_np_parent_lock);
 517                 list_add_tail(&tpg_np->tpg_np_child_list,
 518                         &tpg_np_parent->tpg_np_parent_list);
 519                 spin_unlock(&tpg_np_parent->tpg_np_parent_lock);
 520         }
 521
 522         pr_debug("CORE[%s] - Added Network Portal: %s:%hu,%hu on %s\n",
 523                 tpg->tpg_tiqn->tiqn, np->np_ip, np->np_port, tpg->tpgt,
 524                 np->np_transport->name);
 525
 526         return tpg_np;
 527 }
 528
 529 static int iscsit_tpg_release_np(
 530         struct iscsi_tpg_np *tpg_np,
 531         struct iscsi_portal_group *tpg,
 532         struct iscsi_np *np)
 533 {
 534         iscsit_clear_tpg_np_login_thread(tpg_np, tpg, true);
 535
 536         pr_debug("CORE[%s] - Removed Network Portal: %s:%hu,%hu on %s\n",
 537                 tpg->tpg_tiqn->tiqn, np->np_ip, np->np_port, tpg->tpgt,
 538                 np->np_transport->name);
 539
 540         tpg_np->tpg_np = NULL;
 541         tpg_np->tpg = NULL;
 542         kfree(tpg_np);
 543         /*
 544          * iscsit_del_np() will shutdown struct iscsi_np when last TPG reference is released.
 545          */
 546         return iscsit_del_np(np);
 547 }
 548
 549 int iscsit_tpg_del_network_portal(
 550         struct iscsi_portal_group *tpg,
 551         struct iscsi_tpg_np *tpg_np)
 552 {
 553         struct iscsi_np *np;
 554         struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
 555         int ret = 0;
 556
 557         np = tpg_np->tpg_np;
 558         if (!np) {
 559                 pr_err("Unable to locate struct iscsi_np from"
 560                                 " struct iscsi_tpg_np\n");
 561                 return -EINVAL;
 562         }
 563
 564         if (!tpg_np->tpg_np_parent) {
 565                 /*
 566                  * We are the parent tpg network portal.  Release all of the
 567                  * child tpg_np's (eg: the non ISCSI_TCP ones) on our parent
 568                  * list first.
 569                  */
 570                 list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
 571                                 &tpg_np->tpg_np_parent_list,
 572                                 tpg_np_child_list) {
 573                         ret = iscsit_tpg_del_network_portal(tpg, tpg_np_child);
 574                         if (ret < 0)
 575                                 pr_err("iscsit_tpg_del_network_portal()"
 576                                         " failed: %d\n", ret);
 577                 }
 578         } else {
 579                 /*
 580                  * We are not the parent ISCSI_TCP tpg network portal.  Release
 581                  * our own network portals from the child list.
 582                  */
 583                 spin_lock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
 584                 list_del(&tpg_np->tpg_np_child_list);
 585                 spin_unlock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
 586         }
 587
 588         spin_lock(&tpg->tpg_np_lock);
 589         list_del(&tpg_np->tpg_np_list);
 590         tpg->num_tpg_nps--;
 591         if (tpg->tpg_tiqn)
 592                 tpg->tpg_tiqn->tiqn_num_tpg_nps--;
 593         spin_unlock(&tpg->tpg_np_lock);
 594
 595         return iscsit_tpg_release_np(tpg_np, tpg, np);
 596 }
 597
 598 int iscsit_tpg_set_initiator_node_queue_depth(
 599         struct iscsi_portal_group *tpg,
 600         unsigned char *initiatorname,
 601         u32 queue_depth,
 602         int force)
 603 {
 604         return core_tpg_set_initiator_node_queue_depth(&tpg->tpg_se_tpg,
 605                 initiatorname, queue_depth, force);
 606 }
 607
 608 int iscsit_ta_authentication(struct iscsi_portal_group *tpg, u32 authentication)
 609 {
 610         unsigned char buf1[256], buf2[256], *none = NULL;
 611         int len;
 612         struct iscsi_param *param;
 613         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 614
 615         if ((authentication != 1) && (authentication != 0)) {
 616                 pr_err("Illegal value for authentication parameter:"
 617                         " %u, ignoring request.\n", authentication);
 618                 return -EINVAL;
 619         }
 620
 621         memset(buf1, 0, sizeof(buf1));
 622         memset(buf2, 0, sizeof(buf2));
 623
 624         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
 625         if (!param)
 626                 return -EINVAL;
 627
 628         if (authentication) {
 629                 snprintf(buf1, sizeof(buf1), "%s", param->value);
 630                 none = strstr(buf1, NONE);
 631                 if (!none)
 632                         goto out;
 633                 if (!strncmp(none + 4, ",", 1)) {
 634                         if (!strcmp(buf1, none))
 635                                 sprintf(buf2, "%s", none+5);
 636                         else {
 637                                 none--;
 638                                 *none = '\0';
 639                                 len = sprintf(buf2, "%s", buf1);
 640                                 none += 5;
 641                                 sprintf(buf2 + len, "%s", none);
 642                         }
 643                 } else {
 644                         none--;
 645                         *none = '\0';
 646                         sprintf(buf2, "%s", buf1);
 647                 }
 648                 if (iscsi_update_param_value(param, buf2) < 0)
 649                         return -EINVAL;
 650         } else {
 651                 snprintf(buf1, sizeof(buf1), "%s", param->value);
 652                 none = strstr(buf1, NONE);
 653                 if (none)
 654                         goto out;
 655                 strncat(buf1, ",", strlen(","));
 656                 strncat(buf1, NONE, strlen(NONE));
 657                 if (iscsi_update_param_value(param, buf1) < 0)
 658                         return -EINVAL;
 659         }
 660
 661 out:
 662         a->authentication = authentication;
 663         pr_debug("%s iSCSI Authentication Methods for TPG: %hu.\n",
 664                 a->authentication ? "Enforcing" : "Disabling", tpg->tpgt);
 665
 666         return 0;
 667 }
 668
 669 int iscsit_ta_login_timeout(
 670         struct iscsi_portal_group *tpg,
 671         u32 login_timeout)
 672 {
 673         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 674
 675         if (login_timeout > TA_LOGIN_TIMEOUT_MAX) {
 676                 pr_err("Requested Login Timeout %u larger than maximum"
 677                         " %u\n", login_timeout, TA_LOGIN_TIMEOUT_MAX);
 678                 return -EINVAL;
 679         } else if (login_timeout < TA_LOGIN_TIMEOUT_MIN) {
 680                 pr_err("Requested Logout Timeout %u smaller than"
 681                         " minimum %u\n", login_timeout, TA_LOGIN_TIMEOUT_MIN);
 682                 return -EINVAL;
 683         }
 684
 685         a->login_timeout = login_timeout;
 686         pr_debug("Set Logout Timeout to %u for Target Portal Group"
 687                 " %hu\n", a->login_timeout, tpg->tpgt);
 688
 689         return 0;
 690 }
 691
 692 int iscsit_ta_netif_timeout(
 693         struct iscsi_portal_group *tpg,
 694         u32 netif_timeout)
 695 {
 696         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 697
 698         if (netif_timeout > TA_NETIF_TIMEOUT_MAX) {
 699                 pr_err("Requested Network Interface Timeout %u larger"
 700                         " than maximum %u\n", netif_timeout,
 701                                 TA_NETIF_TIMEOUT_MAX);
 702                 return -EINVAL;
 703         } else if (netif_timeout < TA_NETIF_TIMEOUT_MIN) {
 704                 pr_err("Requested Network Interface Timeout %u smaller"
 705                         " than minimum %u\n", netif_timeout,
 706                                 TA_NETIF_TIMEOUT_MIN);
 707                 return -EINVAL;
 708         }
 709
 710         a->netif_timeout = netif_timeout;
 711         pr_debug("Set Network Interface Timeout to %u for"
 712                 " Target Portal Group %hu\n", a->netif_timeout, tpg->tpgt);
 713
 714         return 0;
 715 }
 716
 717 int iscsit_ta_generate_node_acls(
 718         struct iscsi_portal_group *tpg,
 719         u32 flag)
 720 {
 721         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 722
 723         if ((flag != 0) && (flag != 1)) {
 724                 pr_err("Illegal value %d\n", flag);
 725                 return -EINVAL;
 726         }
 727
 728         a->generate_node_acls = flag;
 729         pr_debug("iSCSI_TPG[%hu] - Generate Initiator Portal Group ACLs: %s\n",
 730                 tpg->tpgt, (a->generate_node_acls) ? "Enabled" : "Disabled");
 731
 732         if (flag == 1 && a->cache_dynamic_acls == 0) {
 733                 pr_debug("Explicitly setting cache_dynamic_acls=1 when "
 734                         "generate_node_acls=1\n");
 735                 a->cache_dynamic_acls = 1;
 736         }
 737
 738         return 0;
 739 }
 740
 741 int iscsit_ta_default_cmdsn_depth(
 742         struct iscsi_portal_group *tpg,
 743         u32 tcq_depth)
 744 {
 745         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 746
 747         if (tcq_depth > TA_DEFAULT_CMDSN_DEPTH_MAX) {
 748                 pr_err("Requested Default Queue Depth: %u larger"
 749                         " than maximum %u\n", tcq_depth,
 750                                 TA_DEFAULT_CMDSN_DEPTH_MAX);
 751                 return -EINVAL;
 752         } else if (tcq_depth < TA_DEFAULT_CMDSN_DEPTH_MIN) {
 753                 pr_err("Requested Default Queue Depth: %u smaller"
 754                         " than minimum %u\n", tcq_depth,
 755                                 TA_DEFAULT_CMDSN_DEPTH_MIN);
 756                 return -EINVAL;
 757         }
 758
 759         a->default_cmdsn_depth = tcq_depth;
 760         pr_debug("iSCSI_TPG[%hu] - Set Default CmdSN TCQ Depth to %u\n",
 761                 tpg->tpgt, a->default_cmdsn_depth);
 762
 763         return 0;
 764 }
 765
 766 int iscsit_ta_cache_dynamic_acls(
 767         struct iscsi_portal_group *tpg,
 768         u32 flag)
 769 {
 770         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 771
 772         if ((flag != 0) && (flag != 1)) {
 773                 pr_err("Illegal value %d\n", flag);
 774                 return -EINVAL;
 775         }
 776
 777         if (a->generate_node_acls == 1 && flag == 0) {
 778                 pr_debug("Skipping cache_dynamic_acls=0 when"
 779                         " generate_node_acls=1\n");
 780                 return 0;
 781         }
 782
 783         a->cache_dynamic_acls = flag;
 784         pr_debug("iSCSI_TPG[%hu] - Cache Dynamic Initiator Portal Group"
 785                 " ACLs %s\n", tpg->tpgt, (a->cache_dynamic_acls) ?
 786                 "Enabled" : "Disabled");
 787
 788         return 0;
 789 }
 790
 791 int iscsit_ta_demo_mode_write_protect(
 792         struct iscsi_portal_group *tpg,
 793         u32 flag)
 794 {
 795         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 796
 797         if ((flag != 0) && (flag != 1)) {
 798                 pr_err("Illegal value %d\n", flag);
 799                 return -EINVAL;
 800         }
 801
 802         a->demo_mode_write_protect = flag;
 803         pr_debug("iSCSI_TPG[%hu] - Demo Mode Write Protect bit: %s\n",
 804                 tpg->tpgt, (a->demo_mode_write_protect) ? "ON" : "OFF");
 805
 806         return 0;
 807 }
 808
 809 int iscsit_ta_prod_mode_write_protect(
 810         struct iscsi_portal_group *tpg,
 811         u32 flag)
 812 {
 813         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 814
 815         if ((flag != 0) && (flag != 1)) {
 816                 pr_err("Illegal value %d\n", flag);
 817                 return -EINVAL;
 818         }
 819
 820         a->prod_mode_write_protect = flag;
 821         pr_debug("iSCSI_TPG[%hu] - Production Mode Write Protect bit:"
 822                 " %s\n", tpg->tpgt, (a->prod_mode_write_protect) ?
 823                 "ON" : "OFF");
 824
 825         return 0;
 826 }
 827
 828 int iscsit_ta_demo_mode_discovery(
 829         struct iscsi_portal_group *tpg,
 830         u32 flag)
 831 {
 832         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 833
 834         if ((flag != 0) && (flag != 1)) {
 835                 pr_err("Illegal value %d\n", flag);
 836                 return -EINVAL;
 837         }
 838
 839         a->demo_mode_discovery = flag;
 840         pr_debug("iSCSI_TPG[%hu] - Demo Mode Discovery bit:"
 841                 " %s\n", tpg->tpgt, (a->demo_mode_discovery) ?
 842                 "ON" : "OFF");
 843
 844         return 0;
 845 }
 846
 847 int iscsit_ta_default_erl(
 848         struct iscsi_portal_group *tpg,
 849         u32 default_erl)
 850 {
 851         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 852
 853         if ((default_erl != 0) && (default_erl != 1) && (default_erl != 2)) {
 854                 pr_err("Illegal value for default_erl: %u\n", default_erl);
 855                 return -EINVAL;
 856         }
 857
 858         a->default_erl = default_erl;
 859         pr_debug("iSCSI_TPG[%hu] - DefaultERL: %u\n", tpg->tpgt, a->default_erl);
 860
 861         return 0;
 862 }
 863
 864 int iscsit_ta_t10_pi(
 865         struct iscsi_portal_group *tpg,
 866         u32 flag)
 867 {
 868         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 869
 870         if ((flag != 0) && (flag != 1)) {
 871                 pr_err("Illegal value %d\n", flag);
 872                 return -EINVAL;
 873         }
 874
 875         a->t10_pi = flag;
 876         pr_debug("iSCSI_TPG[%hu] - T10 Protection information bit:"
 877                 " %s\n", tpg->tpgt, (a->t10_pi) ?
 878                 "ON" : "OFF");
 879
 880         return 0;
 881 }