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         if (shutdown)
 188                 tpg_np->tpg_np->enabled = false;
 189         iscsit_reset_np_thread(tpg_np->tpg_np, tpg_np, tpg, shutdown);
 190 }
 191
 192 void iscsit_clear_tpg_np_login_threads(
 193         struct iscsi_portal_group *tpg,
 194         bool shutdown)
 195 {
 196         struct iscsi_tpg_np *tpg_np;
 197
 198         spin_lock(&tpg->tpg_np_lock);
 199         list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
 200                 if (!tpg_np->tpg_np) {
 201                         pr_err("struct iscsi_tpg_np->tpg_np is NULL!\n");
 202                         continue;
 203                 }
 204                 spin_unlock(&tpg->tpg_np_lock);
 205                 iscsit_clear_tpg_np_login_thread(tpg_np, tpg, shutdown);
 206                 spin_lock(&tpg->tpg_np_lock);
 207         }
 208         spin_unlock(&tpg->tpg_np_lock);
 209 }
 210
 211 void iscsit_tpg_dump_params(struct iscsi_portal_group *tpg)
 212 {
 213         iscsi_print_params(tpg->param_list);
 214 }
 215
 216 static void iscsit_set_default_tpg_attribs(struct iscsi_portal_group *tpg)
 217 {
 218         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 219
 220         a->authentication = TA_AUTHENTICATION;
 221         a->login_timeout = TA_LOGIN_TIMEOUT;
 222         a->netif_timeout = TA_NETIF_TIMEOUT;
 223         a->default_cmdsn_depth = TA_DEFAULT_CMDSN_DEPTH;
 224         a->generate_node_acls = TA_GENERATE_NODE_ACLS;
 225         a->cache_dynamic_acls = TA_CACHE_DYNAMIC_ACLS;
 226         a->demo_mode_write_protect = TA_DEMO_MODE_WRITE_PROTECT;
 227         a->prod_mode_write_protect = TA_PROD_MODE_WRITE_PROTECT;
 228         a->demo_mode_discovery = TA_DEMO_MODE_DISCOVERY;
 229         a->default_erl = TA_DEFAULT_ERL;
 230         a->t10_pi = TA_DEFAULT_T10_PI;
 231 }
 232
 233 int iscsit_tpg_add_portal_group(struct iscsi_tiqn *tiqn, struct iscsi_portal_group *tpg)
 234 {
 235         if (tpg->tpg_state != TPG_STATE_FREE) {
 236                 pr_err("Unable to add iSCSI Target Portal Group: %d"
 237                         " while not in TPG_STATE_FREE state.\n", tpg->tpgt);
 238                 return -EEXIST;
 239         }
 240         iscsit_set_default_tpg_attribs(tpg);
 241
 242         if (iscsi_create_default_params(&tpg->param_list) < 0)
 243                 goto err_out;
 244
 245         tpg->tpg_attrib.tpg = tpg;
 246
 247         spin_lock(&tpg->tpg_state_lock);
 248         tpg->tpg_state  = TPG_STATE_INACTIVE;
 249         spin_unlock(&tpg->tpg_state_lock);
 250
 251         spin_lock(&tiqn->tiqn_tpg_lock);
 252         list_add_tail(&tpg->tpg_list, &tiqn->tiqn_tpg_list);
 253         tiqn->tiqn_ntpgs++;
 254         pr_debug("CORE[%s]_TPG[%hu] - Added iSCSI Target Portal Group\n",
 255                         tiqn->tiqn, tpg->tpgt);
 256         spin_unlock(&tiqn->tiqn_tpg_lock);
 257
 258         return 0;
 259 err_out:
 260         if (tpg->param_list) {
 261                 iscsi_release_param_list(tpg->param_list);
 262                 tpg->param_list = NULL;
 263         }
 264         kfree(tpg);
 265         return -ENOMEM;
 266 }
 267
 268 int iscsit_tpg_del_portal_group(
 269         struct iscsi_tiqn *tiqn,
 270         struct iscsi_portal_group *tpg,
 271         int force)
 272 {
 273         u8 old_state = tpg->tpg_state;
 274
 275         spin_lock(&tpg->tpg_state_lock);
 276         tpg->tpg_state = TPG_STATE_INACTIVE;
 277         spin_unlock(&tpg->tpg_state_lock);
 278
 279         iscsit_clear_tpg_np_login_threads(tpg, true);
 280
 281         if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
 282                 pr_err("Unable to delete iSCSI Target Portal Group:"
 283                         " %hu while active sessions exist, and force=0\n",
 284                         tpg->tpgt);
 285                 tpg->tpg_state = old_state;
 286                 return -EPERM;
 287         }
 288
 289         core_tpg_clear_object_luns(&tpg->tpg_se_tpg);
 290
 291         if (tpg->param_list) {
 292                 iscsi_release_param_list(tpg->param_list);
 293                 tpg->param_list = NULL;
 294         }
 295
 296         core_tpg_deregister(&tpg->tpg_se_tpg);
 297
 298         spin_lock(&tpg->tpg_state_lock);
 299         tpg->tpg_state = TPG_STATE_FREE;
 300         spin_unlock(&tpg->tpg_state_lock);
 301
 302         spin_lock(&tiqn->tiqn_tpg_lock);
 303         tiqn->tiqn_ntpgs--;
 304         list_del(&tpg->tpg_list);
 305         spin_unlock(&tiqn->tiqn_tpg_lock);
 306
 307         pr_debug("CORE[%s]_TPG[%hu] - Deleted iSCSI Target Portal Group\n",
 308                         tiqn->tiqn, tpg->tpgt);
 309
 310         kfree(tpg);
 311         return 0;
 312 }
 313
 314 int iscsit_tpg_enable_portal_group(struct iscsi_portal_group *tpg)
 315 {
 316         struct iscsi_param *param;
 317         struct iscsi_tiqn *tiqn = tpg->tpg_tiqn;
 318         int ret;
 319
 320         spin_lock(&tpg->tpg_state_lock);
 321         if (tpg->tpg_state == TPG_STATE_ACTIVE) {
 322                 pr_err("iSCSI target portal group: %hu is already"
 323                         " active, ignoring request.\n", tpg->tpgt);
 324                 spin_unlock(&tpg->tpg_state_lock);
 325                 return -EINVAL;
 326         }
 327         /*
 328          * Make sure that AuthMethod does not contain None as an option
 329          * unless explictly disabled.  Set the default to CHAP if authentication
 330          * is enforced (as per default), and remove the NONE option.
 331          */
 332         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
 333         if (!param) {
 334                 spin_unlock(&tpg->tpg_state_lock);
 335                 return -EINVAL;
 336         }
 337
 338         if (tpg->tpg_attrib.authentication) {
 339                 if (!strcmp(param->value, NONE)) {
 340                         ret = iscsi_update_param_value(param, CHAP);
 341                         if (ret)
 342                                 goto err;
 343                 }
 344
 345                 ret = iscsit_ta_authentication(tpg, 1);
 346                 if (ret < 0)
 347                         goto err;
 348         }
 349
 350         tpg->tpg_state = TPG_STATE_ACTIVE;
 351         spin_unlock(&tpg->tpg_state_lock);
 352
 353         spin_lock(&tiqn->tiqn_tpg_lock);
 354         tiqn->tiqn_active_tpgs++;
 355         pr_debug("iSCSI_TPG[%hu] - Enabled iSCSI Target Portal Group\n",
 356                         tpg->tpgt);
 357         spin_unlock(&tiqn->tiqn_tpg_lock);
 358
 359         return 0;
 360
 361 err:
 362         spin_unlock(&tpg->tpg_state_lock);
 363         return ret;
 364 }
 365
 366 int iscsit_tpg_disable_portal_group(struct iscsi_portal_group *tpg, int force)
 367 {
 368         struct iscsi_tiqn *tiqn;
 369         u8 old_state = tpg->tpg_state;
 370
 371         spin_lock(&tpg->tpg_state_lock);
 372         if (tpg->tpg_state == TPG_STATE_INACTIVE) {
 373                 pr_err("iSCSI Target Portal Group: %hu is already"
 374                         " inactive, ignoring request.\n", tpg->tpgt);
 375                 spin_unlock(&tpg->tpg_state_lock);
 376                 return -EINVAL;
 377         }
 378         tpg->tpg_state = TPG_STATE_INACTIVE;
 379         spin_unlock(&tpg->tpg_state_lock);
 380
 381         iscsit_clear_tpg_np_login_threads(tpg, false);
 382
 383         if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
 384                 spin_lock(&tpg->tpg_state_lock);
 385                 tpg->tpg_state = old_state;
 386                 spin_unlock(&tpg->tpg_state_lock);
 387                 pr_err("Unable to disable iSCSI Target Portal Group:"
 388                         " %hu while active sessions exist, and force=0\n",
 389                         tpg->tpgt);
 390                 return -EPERM;
 391         }
 392
 393         tiqn = tpg->tpg_tiqn;
 394         if (!tiqn || (tpg == iscsit_global->discovery_tpg))
 395                 return 0;
 396
 397         spin_lock(&tiqn->tiqn_tpg_lock);
 398         tiqn->tiqn_active_tpgs--;
 399         pr_debug("iSCSI_TPG[%hu] - Disabled iSCSI Target Portal Group\n",
 400                         tpg->tpgt);
 401         spin_unlock(&tiqn->tiqn_tpg_lock);
 402
 403         return 0;
 404 }
 405
 406 struct iscsi_node_attrib *iscsit_tpg_get_node_attrib(
 407         struct iscsi_session *sess)
 408 {
 409         struct se_session *se_sess = sess->se_sess;
 410         struct se_node_acl *se_nacl = se_sess->se_node_acl;
 411         struct iscsi_node_acl *acl = container_of(se_nacl, struct iscsi_node_acl,
 412                                         se_node_acl);
 413
 414         return &acl->node_attrib;
 415 }
 416
 417 struct iscsi_tpg_np *iscsit_tpg_locate_child_np(
 418         struct iscsi_tpg_np *tpg_np,
 419         int network_transport)
 420 {
 421         struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
 422
 423         spin_lock(&tpg_np->tpg_np_parent_lock);
 424         list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
 425                         &tpg_np->tpg_np_parent_list, tpg_np_child_list) {
 426                 if (tpg_np_child->tpg_np->np_network_transport ==
 427                                 network_transport) {
 428                         spin_unlock(&tpg_np->tpg_np_parent_lock);
 429                         return tpg_np_child;
 430                 }
 431         }
 432         spin_unlock(&tpg_np->tpg_np_parent_lock);
 433
 434         return NULL;
 435 }
 436
 437 static bool iscsit_tpg_check_network_portal(
 438         struct iscsi_tiqn *tiqn,
 439         struct __kernel_sockaddr_storage *sockaddr,
 440         int network_transport)
 441 {
 442         struct iscsi_portal_group *tpg;
 443         struct iscsi_tpg_np *tpg_np;
 444         struct iscsi_np *np;
 445         bool match = false;
 446
 447         spin_lock(&tiqn->tiqn_tpg_lock);
 448         list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) {
 449
 450                 spin_lock(&tpg->tpg_np_lock);
 451                 list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
 452                         np = tpg_np->tpg_np;
 453
 454                         match = iscsit_check_np_match(sockaddr, np,
 455                                                 network_transport);
 456                         if (match == true)
 457                                 break;
 458                 }
 459                 spin_unlock(&tpg->tpg_np_lock);
 460         }
 461         spin_unlock(&tiqn->tiqn_tpg_lock);
 462
 463         return match;
 464 }
 465
 466 struct iscsi_tpg_np *iscsit_tpg_add_network_portal(
 467         struct iscsi_portal_group *tpg,
 468         struct __kernel_sockaddr_storage *sockaddr,
 469         char *ip_str,
 470         struct iscsi_tpg_np *tpg_np_parent,
 471         int network_transport)
 472 {
 473         struct iscsi_np *np;
 474         struct iscsi_tpg_np *tpg_np;
 475
 476         if (!tpg_np_parent) {
 477                 if (iscsit_tpg_check_network_portal(tpg->tpg_tiqn, sockaddr,
 478                                 network_transport) == true) {
 479                         pr_err("Network Portal: %s already exists on a"
 480                                 " different TPG on %s\n", ip_str,
 481                                 tpg->tpg_tiqn->tiqn);
 482                         return ERR_PTR(-EEXIST);
 483                 }
 484         }
 485
 486         tpg_np = kzalloc(sizeof(struct iscsi_tpg_np), GFP_KERNEL);
 487         if (!tpg_np) {
 488                 pr_err("Unable to allocate memory for"
 489                                 " struct iscsi_tpg_np.\n");
 490                 return ERR_PTR(-ENOMEM);
 491         }
 492
 493         np = iscsit_add_np(sockaddr, ip_str, network_transport);
 494         if (IS_ERR(np)) {
 495                 kfree(tpg_np);
 496                 return ERR_CAST(np);
 497         }
 498
 499         INIT_LIST_HEAD(&tpg_np->tpg_np_list);
 500         INIT_LIST_HEAD(&tpg_np->tpg_np_child_list);
 501         INIT_LIST_HEAD(&tpg_np->tpg_np_parent_list);
 502         spin_lock_init(&tpg_np->tpg_np_parent_lock);
 503         init_completion(&tpg_np->tpg_np_comp);
 504         kref_init(&tpg_np->tpg_np_kref);
 505         tpg_np->tpg_np          = np;
 506         np->tpg_np              = tpg_np;
 507         tpg_np->tpg             = tpg;
 508
 509         spin_lock(&tpg->tpg_np_lock);
 510         list_add_tail(&tpg_np->tpg_np_list, &tpg->tpg_gnp_list);
 511         tpg->num_tpg_nps++;
 512         if (tpg->tpg_tiqn)
 513                 tpg->tpg_tiqn->tiqn_num_tpg_nps++;
 514         spin_unlock(&tpg->tpg_np_lock);
 515
 516         if (tpg_np_parent) {
 517                 tpg_np->tpg_np_parent = tpg_np_parent;
 518                 spin_lock(&tpg_np_parent->tpg_np_parent_lock);
 519                 list_add_tail(&tpg_np->tpg_np_child_list,
 520                         &tpg_np_parent->tpg_np_parent_list);
 521                 spin_unlock(&tpg_np_parent->tpg_np_parent_lock);
 522         }
 523
 524         pr_debug("CORE[%s] - Added Network Portal: %s:%hu,%hu on %s\n",
 525                 tpg->tpg_tiqn->tiqn, np->np_ip, np->np_port, tpg->tpgt,
 526                 np->np_transport->name);
 527
 528         return tpg_np;
 529 }
 530
 531 static int iscsit_tpg_release_np(
 532         struct iscsi_tpg_np *tpg_np,
 533         struct iscsi_portal_group *tpg,
 534         struct iscsi_np *np)
 535 {
 536         iscsit_clear_tpg_np_login_thread(tpg_np, tpg, true);
 537
 538         pr_debug("CORE[%s] - Removed Network Portal: %s:%hu,%hu on %s\n",
 539                 tpg->tpg_tiqn->tiqn, np->np_ip, np->np_port, tpg->tpgt,
 540                 np->np_transport->name);
 541
 542         tpg_np->tpg_np = NULL;
 543         tpg_np->tpg = NULL;
 544         kfree(tpg_np);
 545         /*
 546          * iscsit_del_np() will shutdown struct iscsi_np when last TPG reference is released.
 547          */
 548         return iscsit_del_np(np);
 549 }
 550
 551 int iscsit_tpg_del_network_portal(
 552         struct iscsi_portal_group *tpg,
 553         struct iscsi_tpg_np *tpg_np)
 554 {
 555         struct iscsi_np *np;
 556         struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
 557         int ret = 0;
 558
 559         np = tpg_np->tpg_np;
 560         if (!np) {
 561                 pr_err("Unable to locate struct iscsi_np from"
 562                                 " struct iscsi_tpg_np\n");
 563                 return -EINVAL;
 564         }
 565
 566         if (!tpg_np->tpg_np_parent) {
 567                 /*
 568                  * We are the parent tpg network portal.  Release all of the
 569                  * child tpg_np's (eg: the non ISCSI_TCP ones) on our parent
 570                  * list first.
 571                  */
 572                 list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
 573                                 &tpg_np->tpg_np_parent_list,
 574                                 tpg_np_child_list) {
 575                         ret = iscsit_tpg_del_network_portal(tpg, tpg_np_child);
 576                         if (ret < 0)
 577                                 pr_err("iscsit_tpg_del_network_portal()"
 578                                         " failed: %d\n", ret);
 579                 }
 580         } else {
 581                 /*
 582                  * We are not the parent ISCSI_TCP tpg network portal.  Release
 583                  * our own network portals from the child list.
 584                  */
 585                 spin_lock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
 586                 list_del(&tpg_np->tpg_np_child_list);
 587                 spin_unlock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
 588         }
 589
 590         spin_lock(&tpg->tpg_np_lock);
 591         list_del(&tpg_np->tpg_np_list);
 592         tpg->num_tpg_nps--;
 593         if (tpg->tpg_tiqn)
 594                 tpg->tpg_tiqn->tiqn_num_tpg_nps--;
 595         spin_unlock(&tpg->tpg_np_lock);
 596
 597         return iscsit_tpg_release_np(tpg_np, tpg, np);
 598 }
 599
 600 int iscsit_tpg_set_initiator_node_queue_depth(
 601         struct iscsi_portal_group *tpg,
 602         unsigned char *initiatorname,
 603         u32 queue_depth,
 604         int force)
 605 {
 606         return core_tpg_set_initiator_node_queue_depth(&tpg->tpg_se_tpg,
 607                 initiatorname, queue_depth, force);
 608 }
 609
 610 int iscsit_ta_authentication(struct iscsi_portal_group *tpg, u32 authentication)
 611 {
 612         unsigned char buf1[256], buf2[256], *none = NULL;
 613         int len;
 614         struct iscsi_param *param;
 615         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 616
 617         if ((authentication != 1) && (authentication != 0)) {
 618                 pr_err("Illegal value for authentication parameter:"
 619                         " %u, ignoring request.\n", authentication);
 620                 return -EINVAL;
 621         }
 622
 623         memset(buf1, 0, sizeof(buf1));
 624         memset(buf2, 0, sizeof(buf2));
 625
 626         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
 627         if (!param)
 628                 return -EINVAL;
 629
 630         if (authentication) {
 631                 snprintf(buf1, sizeof(buf1), "%s", param->value);
 632                 none = strstr(buf1, NONE);
 633                 if (!none)
 634                         goto out;
 635                 if (!strncmp(none + 4, ",", 1)) {
 636                         if (!strcmp(buf1, none))
 637                                 sprintf(buf2, "%s", none+5);
 638                         else {
 639                                 none--;
 640                                 *none = '\0';
 641                                 len = sprintf(buf2, "%s", buf1);
 642                                 none += 5;
 643                                 sprintf(buf2 + len, "%s", none);
 644                         }
 645                 } else {
 646                         none--;
 647                         *none = '\0';
 648                         sprintf(buf2, "%s", buf1);
 649                 }
 650                 if (iscsi_update_param_value(param, buf2) < 0)
 651                         return -EINVAL;
 652         } else {
 653                 snprintf(buf1, sizeof(buf1), "%s", param->value);
 654                 none = strstr(buf1, NONE);
 655                 if (none)
 656                         goto out;
 657                 strncat(buf1, ",", strlen(","));
 658                 strncat(buf1, NONE, strlen(NONE));
 659                 if (iscsi_update_param_value(param, buf1) < 0)
 660                         return -EINVAL;
 661         }
 662
 663 out:
 664         a->authentication = authentication;
 665         pr_debug("%s iSCSI Authentication Methods for TPG: %hu.\n",
 666                 a->authentication ? "Enforcing" : "Disabling", tpg->tpgt);
 667
 668         return 0;
 669 }
 670
 671 int iscsit_ta_login_timeout(
 672         struct iscsi_portal_group *tpg,
 673         u32 login_timeout)
 674 {
 675         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 676
 677         if (login_timeout > TA_LOGIN_TIMEOUT_MAX) {
 678                 pr_err("Requested Login Timeout %u larger than maximum"
 679                         " %u\n", login_timeout, TA_LOGIN_TIMEOUT_MAX);
 680                 return -EINVAL;
 681         } else if (login_timeout < TA_LOGIN_TIMEOUT_MIN) {
 682                 pr_err("Requested Logout Timeout %u smaller than"
 683                         " minimum %u\n", login_timeout, TA_LOGIN_TIMEOUT_MIN);
 684                 return -EINVAL;
 685         }
 686
 687         a->login_timeout = login_timeout;
 688         pr_debug("Set Logout Timeout to %u for Target Portal Group"
 689                 " %hu\n", a->login_timeout, tpg->tpgt);
 690
 691         return 0;
 692 }
 693
 694 int iscsit_ta_netif_timeout(
 695         struct iscsi_portal_group *tpg,
 696         u32 netif_timeout)
 697 {
 698         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 699
 700         if (netif_timeout > TA_NETIF_TIMEOUT_MAX) {
 701                 pr_err("Requested Network Interface Timeout %u larger"
 702                         " than maximum %u\n", netif_timeout,
 703                                 TA_NETIF_TIMEOUT_MAX);
 704                 return -EINVAL;
 705         } else if (netif_timeout < TA_NETIF_TIMEOUT_MIN) {
 706                 pr_err("Requested Network Interface Timeout %u smaller"
 707                         " than minimum %u\n", netif_timeout,
 708                                 TA_NETIF_TIMEOUT_MIN);
 709                 return -EINVAL;
 710         }
 711
 712         a->netif_timeout = netif_timeout;
 713         pr_debug("Set Network Interface Timeout to %u for"
 714                 " Target Portal Group %hu\n", a->netif_timeout, tpg->tpgt);
 715
 716         return 0;
 717 }
 718
 719 int iscsit_ta_generate_node_acls(
 720         struct iscsi_portal_group *tpg,
 721         u32 flag)
 722 {
 723         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 724
 725         if ((flag != 0) && (flag != 1)) {
 726                 pr_err("Illegal value %d\n", flag);
 727                 return -EINVAL;
 728         }
 729
 730         a->generate_node_acls = flag;
 731         pr_debug("iSCSI_TPG[%hu] - Generate Initiator Portal Group ACLs: %s\n",
 732                 tpg->tpgt, (a->generate_node_acls) ? "Enabled" : "Disabled");
 733
 734         if (flag == 1 && a->cache_dynamic_acls == 0) {
 735                 pr_debug("Explicitly setting cache_dynamic_acls=1 when "
 736                         "generate_node_acls=1\n");
 737                 a->cache_dynamic_acls = 1;
 738         }
 739
 740         return 0;
 741 }
 742
 743 int iscsit_ta_default_cmdsn_depth(
 744         struct iscsi_portal_group *tpg,
 745         u32 tcq_depth)
 746 {
 747         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 748
 749         if (tcq_depth > TA_DEFAULT_CMDSN_DEPTH_MAX) {
 750                 pr_err("Requested Default Queue Depth: %u larger"
 751                         " than maximum %u\n", tcq_depth,
 752                                 TA_DEFAULT_CMDSN_DEPTH_MAX);
 753                 return -EINVAL;
 754         } else if (tcq_depth < TA_DEFAULT_CMDSN_DEPTH_MIN) {
 755                 pr_err("Requested Default Queue Depth: %u smaller"
 756                         " than minimum %u\n", tcq_depth,
 757                                 TA_DEFAULT_CMDSN_DEPTH_MIN);
 758                 return -EINVAL;
 759         }
 760
 761         a->default_cmdsn_depth = tcq_depth;
 762         pr_debug("iSCSI_TPG[%hu] - Set Default CmdSN TCQ Depth to %u\n",
 763                 tpg->tpgt, a->default_cmdsn_depth);
 764
 765         return 0;
 766 }
 767
 768 int iscsit_ta_cache_dynamic_acls(
 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         if (a->generate_node_acls == 1 && flag == 0) {
 780                 pr_debug("Skipping cache_dynamic_acls=0 when"
 781                         " generate_node_acls=1\n");
 782                 return 0;
 783         }
 784
 785         a->cache_dynamic_acls = flag;
 786         pr_debug("iSCSI_TPG[%hu] - Cache Dynamic Initiator Portal Group"
 787                 " ACLs %s\n", tpg->tpgt, (a->cache_dynamic_acls) ?
 788                 "Enabled" : "Disabled");
 789
 790         return 0;
 791 }
 792
 793 int iscsit_ta_demo_mode_write_protect(
 794         struct iscsi_portal_group *tpg,
 795         u32 flag)
 796 {
 797         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 798
 799         if ((flag != 0) && (flag != 1)) {
 800                 pr_err("Illegal value %d\n", flag);
 801                 return -EINVAL;
 802         }
 803
 804         a->demo_mode_write_protect = flag;
 805         pr_debug("iSCSI_TPG[%hu] - Demo Mode Write Protect bit: %s\n",
 806                 tpg->tpgt, (a->demo_mode_write_protect) ? "ON" : "OFF");
 807
 808         return 0;
 809 }
 810
 811 int iscsit_ta_prod_mode_write_protect(
 812         struct iscsi_portal_group *tpg,
 813         u32 flag)
 814 {
 815         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 816
 817         if ((flag != 0) && (flag != 1)) {
 818                 pr_err("Illegal value %d\n", flag);
 819                 return -EINVAL;
 820         }
 821
 822         a->prod_mode_write_protect = flag;
 823         pr_debug("iSCSI_TPG[%hu] - Production Mode Write Protect bit:"
 824                 " %s\n", tpg->tpgt, (a->prod_mode_write_protect) ?
 825                 "ON" : "OFF");
 826
 827         return 0;
 828 }
 829
 830 int iscsit_ta_demo_mode_discovery(
 831         struct iscsi_portal_group *tpg,
 832         u32 flag)
 833 {
 834         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 835
 836         if ((flag != 0) && (flag != 1)) {
 837                 pr_err("Illegal value %d\n", flag);
 838                 return -EINVAL;
 839         }
 840
 841         a->demo_mode_discovery = flag;
 842         pr_debug("iSCSI_TPG[%hu] - Demo Mode Discovery bit:"
 843                 " %s\n", tpg->tpgt, (a->demo_mode_discovery) ?
 844                 "ON" : "OFF");
 845
 846         return 0;
 847 }
 848
 849 int iscsit_ta_default_erl(
 850         struct iscsi_portal_group *tpg,
 851         u32 default_erl)
 852 {
 853         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 854
 855         if ((default_erl != 0) && (default_erl != 1) && (default_erl != 2)) {
 856                 pr_err("Illegal value for default_erl: %u\n", default_erl);
 857                 return -EINVAL;
 858         }
 859
 860         a->default_erl = default_erl;
 861         pr_debug("iSCSI_TPG[%hu] - DefaultERL: %u\n", tpg->tpgt, a->default_erl);
 862
 863         return 0;
 864 }
 865
 866 int iscsit_ta_t10_pi(
 867         struct iscsi_portal_group *tpg,
 868         u32 flag)
 869 {
 870         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 871
 872         if ((flag != 0) && (flag != 1)) {
 873                 pr_err("Illegal value %d\n", flag);
 874                 return -EINVAL;
 875         }
 876
 877         a->t10_pi = flag;
 878         pr_debug("iSCSI_TPG[%hu] - T10 Protection information bit:"
 879                 " %s\n", tpg->tpgt, (a->t10_pi) ?
 880                 "ON" : "OFF");
 881
 882         return 0;
 883 }