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 <linux/slab.h>
  20 #include <target/target_core_base.h>
  21 #include <target/target_core_fabric.h>
  22 #include <target/iscsi/iscsi_target_core.h>
  23 #include "iscsi_target_erl0.h"
  24 #include "iscsi_target_login.h"
  25 #include "iscsi_target_nodeattrib.h"
  26 #include "iscsi_target_tpg.h"
  27 #include "iscsi_target_util.h"
  28 #include "iscsi_target.h"
  29 #include "iscsi_target_parameters.h"
  30
  31 #include <target/iscsi/iscsi_transport.h>
  32
  33 struct iscsi_portal_group *iscsit_alloc_portal_group(struct iscsi_tiqn *tiqn, u16 tpgt)
  34 {
  35         struct iscsi_portal_group *tpg;
  36
  37         tpg = kzalloc(sizeof(struct iscsi_portal_group), GFP_KERNEL);
  38         if (!tpg) {
  39                 pr_err("Unable to allocate struct iscsi_portal_group\n");
  40                 return NULL;
  41         }
  42
  43         tpg->tpgt = tpgt;
  44         tpg->tpg_state = TPG_STATE_FREE;
  45         tpg->tpg_tiqn = tiqn;
  46         INIT_LIST_HEAD(&tpg->tpg_gnp_list);
  47         INIT_LIST_HEAD(&tpg->tpg_list);
  48         mutex_init(&tpg->tpg_access_lock);
  49         sema_init(&tpg->np_login_sem, 1);
  50         spin_lock_init(&tpg->tpg_state_lock);
  51         spin_lock_init(&tpg->tpg_np_lock);
  52
  53         return tpg;
  54 }
  55
  56 static void iscsit_set_default_tpg_attribs(struct iscsi_portal_group *);
  57
  58 int iscsit_load_discovery_tpg(void)
  59 {
  60         struct iscsi_param *param;
  61         struct iscsi_portal_group *tpg;
  62         int ret;
  63
  64         tpg = iscsit_alloc_portal_group(NULL, 1);
  65         if (!tpg) {
  66                 pr_err("Unable to allocate struct iscsi_portal_group\n");
  67                 return -1;
  68         }
  69         /*
  70          * Save iscsi_ops pointer for special case discovery TPG that
  71          * doesn't exist as se_wwn->wwn_group within configfs.
  72          */
  73         tpg->tpg_se_tpg.se_tpg_tfo = &iscsi_ops;
  74         ret = core_tpg_register(NULL, &tpg->tpg_se_tpg, -1);
  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         return mutex_lock_interruptible(&tpg->tpg_access_lock);
 167 }
 168
 169 void iscsit_put_tpg(struct iscsi_portal_group *tpg)
 170 {
 171         mutex_unlock(&tpg->tpg_access_lock);
 172 }
 173
 174 static void iscsit_clear_tpg_np_login_thread(
 175         struct iscsi_tpg_np *tpg_np,
 176         struct iscsi_portal_group *tpg,
 177         bool shutdown)
 178 {
 179         if (!tpg_np->tpg_np) {
 180                 pr_err("struct iscsi_tpg_np->tpg_np is NULL!\n");
 181                 return;
 182         }
 183
 184         if (shutdown)
 185                 tpg_np->tpg_np->enabled = false;
 186         iscsit_reset_np_thread(tpg_np->tpg_np, tpg_np, tpg, shutdown);
 187 }
 188
 189 static void iscsit_clear_tpg_np_login_threads(
 190         struct iscsi_portal_group *tpg,
 191         bool shutdown)
 192 {
 193         struct iscsi_tpg_np *tpg_np;
 194
 195         spin_lock(&tpg->tpg_np_lock);
 196         list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
 197                 if (!tpg_np->tpg_np) {
 198                         pr_err("struct iscsi_tpg_np->tpg_np is NULL!\n");
 199                         continue;
 200                 }
 201                 spin_unlock(&tpg->tpg_np_lock);
 202                 iscsit_clear_tpg_np_login_thread(tpg_np, tpg, shutdown);
 203                 spin_lock(&tpg->tpg_np_lock);
 204         }
 205         spin_unlock(&tpg->tpg_np_lock);
 206 }
 207
 208 void iscsit_tpg_dump_params(struct iscsi_portal_group *tpg)
 209 {
 210         iscsi_print_params(tpg->param_list);
 211 }
 212
 213 static void iscsit_set_default_tpg_attribs(struct iscsi_portal_group *tpg)
 214 {
 215         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 216
 217         a->authentication = TA_AUTHENTICATION;
 218         a->login_timeout = TA_LOGIN_TIMEOUT;
 219         a->netif_timeout = TA_NETIF_TIMEOUT;
 220         a->default_cmdsn_depth = TA_DEFAULT_CMDSN_DEPTH;
 221         a->generate_node_acls = TA_GENERATE_NODE_ACLS;
 222         a->cache_dynamic_acls = TA_CACHE_DYNAMIC_ACLS;
 223         a->demo_mode_write_protect = TA_DEMO_MODE_WRITE_PROTECT;
 224         a->prod_mode_write_protect = TA_PROD_MODE_WRITE_PROTECT;
 225         a->demo_mode_discovery = TA_DEMO_MODE_DISCOVERY;
 226         a->default_erl = TA_DEFAULT_ERL;
 227         a->t10_pi = TA_DEFAULT_T10_PI;
 228         a->fabric_prot_type = TA_DEFAULT_FABRIC_PROT_TYPE;
 229         a->tpg_enabled_sendtargets = TA_DEFAULT_TPG_ENABLED_SENDTARGETS;
 230 }
 231
 232 int iscsit_tpg_add_portal_group(struct iscsi_tiqn *tiqn, struct iscsi_portal_group *tpg)
 233 {
 234         if (tpg->tpg_state != TPG_STATE_FREE) {
 235                 pr_err("Unable to add iSCSI Target Portal Group: %d"
 236                         " while not in TPG_STATE_FREE state.\n", tpg->tpgt);
 237                 return -EEXIST;
 238         }
 239         iscsit_set_default_tpg_attribs(tpg);
 240
 241         if (iscsi_create_default_params(&tpg->param_list) < 0)
 242                 goto err_out;
 243
 244         tpg->tpg_attrib.tpg = tpg;
 245
 246         spin_lock(&tpg->tpg_state_lock);
 247         tpg->tpg_state  = TPG_STATE_INACTIVE;
 248         spin_unlock(&tpg->tpg_state_lock);
 249
 250         spin_lock(&tiqn->tiqn_tpg_lock);
 251         list_add_tail(&tpg->tpg_list, &tiqn->tiqn_tpg_list);
 252         tiqn->tiqn_ntpgs++;
 253         pr_debug("CORE[%s]_TPG[%hu] - Added iSCSI Target Portal Group\n",
 254                         tiqn->tiqn, tpg->tpgt);
 255         spin_unlock(&tiqn->tiqn_tpg_lock);
 256
 257         return 0;
 258 err_out:
 259         if (tpg->param_list) {
 260                 iscsi_release_param_list(tpg->param_list);
 261                 tpg->param_list = NULL;
 262         }
 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         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         if (tpg->param_list) {
 286                 iscsi_release_param_list(tpg->param_list);
 287                 tpg->param_list = NULL;
 288         }
 289
 290         core_tpg_deregister(&tpg->tpg_se_tpg);
 291
 292         spin_lock(&tpg->tpg_state_lock);
 293         tpg->tpg_state = TPG_STATE_FREE;
 294         spin_unlock(&tpg->tpg_state_lock);
 295
 296         spin_lock(&tiqn->tiqn_tpg_lock);
 297         tiqn->tiqn_ntpgs--;
 298         list_del(&tpg->tpg_list);
 299         spin_unlock(&tiqn->tiqn_tpg_lock);
 300
 301         pr_debug("CORE[%s]_TPG[%hu] - Deleted iSCSI Target Portal Group\n",
 302                         tiqn->tiqn, tpg->tpgt);
 303
 304         kfree(tpg);
 305         return 0;
 306 }
 307
 308 int iscsit_tpg_enable_portal_group(struct iscsi_portal_group *tpg)
 309 {
 310         struct iscsi_param *param;
 311         struct iscsi_tiqn *tiqn = tpg->tpg_tiqn;
 312         int ret;
 313
 314         spin_lock(&tpg->tpg_state_lock);
 315         if (tpg->tpg_state == TPG_STATE_ACTIVE) {
 316                 pr_err("iSCSI target portal group: %hu is already"
 317                         " active, ignoring request.\n", tpg->tpgt);
 318                 spin_unlock(&tpg->tpg_state_lock);
 319                 return -EINVAL;
 320         }
 321         /*
 322          * Make sure that AuthMethod does not contain None as an option
 323          * unless explictly disabled.  Set the default to CHAP if authentication
 324          * is enforced (as per default), and remove the NONE option.
 325          */
 326         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
 327         if (!param) {
 328                 spin_unlock(&tpg->tpg_state_lock);
 329                 return -EINVAL;
 330         }
 331
 332         if (tpg->tpg_attrib.authentication) {
 333                 if (!strcmp(param->value, NONE)) {
 334                         ret = iscsi_update_param_value(param, CHAP);
 335                         if (ret)
 336                                 goto err;
 337                 }
 338
 339                 ret = iscsit_ta_authentication(tpg, 1);
 340                 if (ret < 0)
 341                         goto err;
 342         }
 343
 344         tpg->tpg_state = TPG_STATE_ACTIVE;
 345         spin_unlock(&tpg->tpg_state_lock);
 346
 347         spin_lock(&tiqn->tiqn_tpg_lock);
 348         tiqn->tiqn_active_tpgs++;
 349         pr_debug("iSCSI_TPG[%hu] - Enabled iSCSI Target Portal Group\n",
 350                         tpg->tpgt);
 351         spin_unlock(&tiqn->tiqn_tpg_lock);
 352
 353         return 0;
 354
 355 err:
 356         spin_unlock(&tpg->tpg_state_lock);
 357         return ret;
 358 }
 359
 360 int iscsit_tpg_disable_portal_group(struct iscsi_portal_group *tpg, int force)
 361 {
 362         struct iscsi_tiqn *tiqn;
 363         u8 old_state = tpg->tpg_state;
 364
 365         spin_lock(&tpg->tpg_state_lock);
 366         if (tpg->tpg_state == TPG_STATE_INACTIVE) {
 367                 pr_err("iSCSI Target Portal Group: %hu is already"
 368                         " inactive, ignoring request.\n", tpg->tpgt);
 369                 spin_unlock(&tpg->tpg_state_lock);
 370                 return -EINVAL;
 371         }
 372         tpg->tpg_state = TPG_STATE_INACTIVE;
 373         spin_unlock(&tpg->tpg_state_lock);
 374
 375         iscsit_clear_tpg_np_login_threads(tpg, false);
 376
 377         if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
 378                 spin_lock(&tpg->tpg_state_lock);
 379                 tpg->tpg_state = old_state;
 380                 spin_unlock(&tpg->tpg_state_lock);
 381                 pr_err("Unable to disable iSCSI Target Portal Group:"
 382                         " %hu while active sessions exist, and force=0\n",
 383                         tpg->tpgt);
 384                 return -EPERM;
 385         }
 386
 387         tiqn = tpg->tpg_tiqn;
 388         if (!tiqn || (tpg == iscsit_global->discovery_tpg))
 389                 return 0;
 390
 391         spin_lock(&tiqn->tiqn_tpg_lock);
 392         tiqn->tiqn_active_tpgs--;
 393         pr_debug("iSCSI_TPG[%hu] - Disabled iSCSI Target Portal Group\n",
 394                         tpg->tpgt);
 395         spin_unlock(&tiqn->tiqn_tpg_lock);
 396
 397         return 0;
 398 }
 399
 400 struct iscsi_node_attrib *iscsit_tpg_get_node_attrib(
 401         struct iscsi_session *sess)
 402 {
 403         struct se_session *se_sess = sess->se_sess;
 404         struct se_node_acl *se_nacl = se_sess->se_node_acl;
 405         struct iscsi_node_acl *acl = container_of(se_nacl, struct iscsi_node_acl,
 406                                         se_node_acl);
 407
 408         return &acl->node_attrib;
 409 }
 410
 411 struct iscsi_tpg_np *iscsit_tpg_locate_child_np(
 412         struct iscsi_tpg_np *tpg_np,
 413         int network_transport)
 414 {
 415         struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
 416
 417         spin_lock(&tpg_np->tpg_np_parent_lock);
 418         list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
 419                         &tpg_np->tpg_np_parent_list, tpg_np_child_list) {
 420                 if (tpg_np_child->tpg_np->np_network_transport ==
 421                                 network_transport) {
 422                         spin_unlock(&tpg_np->tpg_np_parent_lock);
 423                         return tpg_np_child;
 424                 }
 425         }
 426         spin_unlock(&tpg_np->tpg_np_parent_lock);
 427
 428         return NULL;
 429 }
 430
 431 static bool iscsit_tpg_check_network_portal(
 432         struct iscsi_tiqn *tiqn,
 433         struct sockaddr_storage *sockaddr,
 434         int network_transport)
 435 {
 436         struct iscsi_portal_group *tpg;
 437         struct iscsi_tpg_np *tpg_np;
 438         struct iscsi_np *np;
 439         bool match = false;
 440
 441         spin_lock(&tiqn->tiqn_tpg_lock);
 442         list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) {
 443
 444                 spin_lock(&tpg->tpg_np_lock);
 445                 list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
 446                         np = tpg_np->tpg_np;
 447
 448                         match = iscsit_check_np_match(sockaddr, np,
 449                                                 network_transport);
 450                         if (match)
 451                                 break;
 452                 }
 453                 spin_unlock(&tpg->tpg_np_lock);
 454         }
 455         spin_unlock(&tiqn->tiqn_tpg_lock);
 456
 457         return match;
 458 }
 459
 460 struct iscsi_tpg_np *iscsit_tpg_add_network_portal(
 461         struct iscsi_portal_group *tpg,
 462         struct sockaddr_storage *sockaddr,
 463         struct iscsi_tpg_np *tpg_np_parent,
 464         int network_transport)
 465 {
 466         struct iscsi_np *np;
 467         struct iscsi_tpg_np *tpg_np;
 468
 469         if (!tpg_np_parent) {
 470                 if (iscsit_tpg_check_network_portal(tpg->tpg_tiqn, sockaddr,
 471                                 network_transport)) {
 472                         pr_err("Network Portal: %pISc already exists on a"
 473                                 " different TPG on %s\n", sockaddr,
 474                                 tpg->tpg_tiqn->tiqn);
 475                         return ERR_PTR(-EEXIST);
 476                 }
 477         }
 478
 479         tpg_np = kzalloc(sizeof(struct iscsi_tpg_np), GFP_KERNEL);
 480         if (!tpg_np) {
 481                 pr_err("Unable to allocate memory for"
 482                                 " struct iscsi_tpg_np.\n");
 483                 return ERR_PTR(-ENOMEM);
 484         }
 485
 486         np = iscsit_add_np(sockaddr, network_transport);
 487         if (IS_ERR(np)) {
 488                 kfree(tpg_np);
 489                 return ERR_CAST(np);
 490         }
 491
 492         INIT_LIST_HEAD(&tpg_np->tpg_np_list);
 493         INIT_LIST_HEAD(&tpg_np->tpg_np_child_list);
 494         INIT_LIST_HEAD(&tpg_np->tpg_np_parent_list);
 495         spin_lock_init(&tpg_np->tpg_np_parent_lock);
 496         init_completion(&tpg_np->tpg_np_comp);
 497         kref_init(&tpg_np->tpg_np_kref);
 498         tpg_np->tpg_np          = np;
 499         tpg_np->tpg             = tpg;
 500
 501         spin_lock(&tpg->tpg_np_lock);
 502         list_add_tail(&tpg_np->tpg_np_list, &tpg->tpg_gnp_list);
 503         tpg->num_tpg_nps++;
 504         if (tpg->tpg_tiqn)
 505                 tpg->tpg_tiqn->tiqn_num_tpg_nps++;
 506         spin_unlock(&tpg->tpg_np_lock);
 507
 508         if (tpg_np_parent) {
 509                 tpg_np->tpg_np_parent = tpg_np_parent;
 510                 spin_lock(&tpg_np_parent->tpg_np_parent_lock);
 511                 list_add_tail(&tpg_np->tpg_np_child_list,
 512                         &tpg_np_parent->tpg_np_parent_list);
 513                 spin_unlock(&tpg_np_parent->tpg_np_parent_lock);
 514         }
 515
 516         pr_debug("CORE[%s] - Added Network Portal: %pISpc,%hu on %s\n",
 517                 tpg->tpg_tiqn->tiqn, &np->np_sockaddr, tpg->tpgt,
 518                 np->np_transport->name);
 519
 520         return tpg_np;
 521 }
 522
 523 static int iscsit_tpg_release_np(
 524         struct iscsi_tpg_np *tpg_np,
 525         struct iscsi_portal_group *tpg,
 526         struct iscsi_np *np)
 527 {
 528         iscsit_clear_tpg_np_login_thread(tpg_np, tpg, true);
 529
 530         pr_debug("CORE[%s] - Removed Network Portal: %pISpc,%hu on %s\n",
 531                 tpg->tpg_tiqn->tiqn, &np->np_sockaddr, tpg->tpgt,
 532                 np->np_transport->name);
 533
 534         tpg_np->tpg_np = NULL;
 535         tpg_np->tpg = NULL;
 536         kfree(tpg_np);
 537         /*
 538          * iscsit_del_np() will shutdown struct iscsi_np when last TPG reference is released.
 539          */
 540         return iscsit_del_np(np);
 541 }
 542
 543 int iscsit_tpg_del_network_portal(
 544         struct iscsi_portal_group *tpg,
 545         struct iscsi_tpg_np *tpg_np)
 546 {
 547         struct iscsi_np *np;
 548         struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
 549         int ret = 0;
 550
 551         np = tpg_np->tpg_np;
 552         if (!np) {
 553                 pr_err("Unable to locate struct iscsi_np from"
 554                                 " struct iscsi_tpg_np\n");
 555                 return -EINVAL;
 556         }
 557
 558         if (!tpg_np->tpg_np_parent) {
 559                 /*
 560                  * We are the parent tpg network portal.  Release all of the
 561                  * child tpg_np's (eg: the non ISCSI_TCP ones) on our parent
 562                  * list first.
 563                  */
 564                 list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
 565                                 &tpg_np->tpg_np_parent_list,
 566                                 tpg_np_child_list) {
 567                         ret = iscsit_tpg_del_network_portal(tpg, tpg_np_child);
 568                         if (ret < 0)
 569                                 pr_err("iscsit_tpg_del_network_portal()"
 570                                         " failed: %d\n", ret);
 571                 }
 572         } else {
 573                 /*
 574                  * We are not the parent ISCSI_TCP tpg network portal.  Release
 575                  * our own network portals from the child list.
 576                  */
 577                 spin_lock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
 578                 list_del(&tpg_np->tpg_np_child_list);
 579                 spin_unlock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
 580         }
 581
 582         spin_lock(&tpg->tpg_np_lock);
 583         list_del(&tpg_np->tpg_np_list);
 584         tpg->num_tpg_nps--;
 585         if (tpg->tpg_tiqn)
 586                 tpg->tpg_tiqn->tiqn_num_tpg_nps--;
 587         spin_unlock(&tpg->tpg_np_lock);
 588
 589         return iscsit_tpg_release_np(tpg_np, tpg, np);
 590 }
 591
 592 int iscsit_ta_authentication(struct iscsi_portal_group *tpg, u32 authentication)
 593 {
 594         unsigned char buf1[256], buf2[256], *none = NULL;
 595         int len;
 596         struct iscsi_param *param;
 597         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 598
 599         if ((authentication != 1) && (authentication != 0)) {
 600                 pr_err("Illegal value for authentication parameter:"
 601                         " %u, ignoring request.\n", authentication);
 602                 return -EINVAL;
 603         }
 604
 605         memset(buf1, 0, sizeof(buf1));
 606         memset(buf2, 0, sizeof(buf2));
 607
 608         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
 609         if (!param)
 610                 return -EINVAL;
 611
 612         if (authentication) {
 613                 snprintf(buf1, sizeof(buf1), "%s", param->value);
 614                 none = strstr(buf1, NONE);
 615                 if (!none)
 616                         goto out;
 617                 if (!strncmp(none + 4, ",", 1)) {
 618                         if (!strcmp(buf1, none))
 619                                 sprintf(buf2, "%s", none+5);
 620                         else {
 621                                 none--;
 622                                 *none = '\0';
 623                                 len = sprintf(buf2, "%s", buf1);
 624                                 none += 5;
 625                                 sprintf(buf2 + len, "%s", none);
 626                         }
 627                 } else {
 628                         none--;
 629                         *none = '\0';
 630                         sprintf(buf2, "%s", buf1);
 631                 }
 632                 if (iscsi_update_param_value(param, buf2) < 0)
 633                         return -EINVAL;
 634         } else {
 635                 snprintf(buf1, sizeof(buf1), "%s", param->value);
 636                 none = strstr(buf1, NONE);
 637                 if (none)
 638                         goto out;
 639                 strncat(buf1, ",", strlen(","));
 640                 strncat(buf1, NONE, strlen(NONE));
 641                 if (iscsi_update_param_value(param, buf1) < 0)
 642                         return -EINVAL;
 643         }
 644
 645 out:
 646         a->authentication = authentication;
 647         pr_debug("%s iSCSI Authentication Methods for TPG: %hu.\n",
 648                 a->authentication ? "Enforcing" : "Disabling", tpg->tpgt);
 649
 650         return 0;
 651 }
 652
 653 int iscsit_ta_login_timeout(
 654         struct iscsi_portal_group *tpg,
 655         u32 login_timeout)
 656 {
 657         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 658
 659         if (login_timeout > TA_LOGIN_TIMEOUT_MAX) {
 660                 pr_err("Requested Login Timeout %u larger than maximum"
 661                         " %u\n", login_timeout, TA_LOGIN_TIMEOUT_MAX);
 662                 return -EINVAL;
 663         } else if (login_timeout < TA_LOGIN_TIMEOUT_MIN) {
 664                 pr_err("Requested Logout Timeout %u smaller than"
 665                         " minimum %u\n", login_timeout, TA_LOGIN_TIMEOUT_MIN);
 666                 return -EINVAL;
 667         }
 668
 669         a->login_timeout = login_timeout;
 670         pr_debug("Set Logout Timeout to %u for Target Portal Group"
 671                 " %hu\n", a->login_timeout, tpg->tpgt);
 672
 673         return 0;
 674 }
 675
 676 int iscsit_ta_netif_timeout(
 677         struct iscsi_portal_group *tpg,
 678         u32 netif_timeout)
 679 {
 680         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 681
 682         if (netif_timeout > TA_NETIF_TIMEOUT_MAX) {
 683                 pr_err("Requested Network Interface Timeout %u larger"
 684                         " than maximum %u\n", netif_timeout,
 685                                 TA_NETIF_TIMEOUT_MAX);
 686                 return -EINVAL;
 687         } else if (netif_timeout < TA_NETIF_TIMEOUT_MIN) {
 688                 pr_err("Requested Network Interface Timeout %u smaller"
 689                         " than minimum %u\n", netif_timeout,
 690                                 TA_NETIF_TIMEOUT_MIN);
 691                 return -EINVAL;
 692         }
 693
 694         a->netif_timeout = netif_timeout;
 695         pr_debug("Set Network Interface Timeout to %u for"
 696                 " Target Portal Group %hu\n", a->netif_timeout, tpg->tpgt);
 697
 698         return 0;
 699 }
 700
 701 int iscsit_ta_generate_node_acls(
 702         struct iscsi_portal_group *tpg,
 703         u32 flag)
 704 {
 705         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 706
 707         if ((flag != 0) && (flag != 1)) {
 708                 pr_err("Illegal value %d\n", flag);
 709                 return -EINVAL;
 710         }
 711
 712         a->generate_node_acls = flag;
 713         pr_debug("iSCSI_TPG[%hu] - Generate Initiator Portal Group ACLs: %s\n",
 714                 tpg->tpgt, (a->generate_node_acls) ? "Enabled" : "Disabled");
 715
 716         if (flag == 1 && a->cache_dynamic_acls == 0) {
 717                 pr_debug("Explicitly setting cache_dynamic_acls=1 when "
 718                         "generate_node_acls=1\n");
 719                 a->cache_dynamic_acls = 1;
 720         }
 721
 722         return 0;
 723 }
 724
 725 int iscsit_ta_default_cmdsn_depth(
 726         struct iscsi_portal_group *tpg,
 727         u32 tcq_depth)
 728 {
 729         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 730
 731         if (tcq_depth > TA_DEFAULT_CMDSN_DEPTH_MAX) {
 732                 pr_err("Requested Default Queue Depth: %u larger"
 733                         " than maximum %u\n", tcq_depth,
 734                                 TA_DEFAULT_CMDSN_DEPTH_MAX);
 735                 return -EINVAL;
 736         } else if (tcq_depth < TA_DEFAULT_CMDSN_DEPTH_MIN) {
 737                 pr_err("Requested Default Queue Depth: %u smaller"
 738                         " than minimum %u\n", tcq_depth,
 739                                 TA_DEFAULT_CMDSN_DEPTH_MIN);
 740                 return -EINVAL;
 741         }
 742
 743         a->default_cmdsn_depth = tcq_depth;
 744         pr_debug("iSCSI_TPG[%hu] - Set Default CmdSN TCQ Depth to %u\n",
 745                 tpg->tpgt, a->default_cmdsn_depth);
 746
 747         return 0;
 748 }
 749
 750 int iscsit_ta_cache_dynamic_acls(
 751         struct iscsi_portal_group *tpg,
 752         u32 flag)
 753 {
 754         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 755
 756         if ((flag != 0) && (flag != 1)) {
 757                 pr_err("Illegal value %d\n", flag);
 758                 return -EINVAL;
 759         }
 760
 761         if (a->generate_node_acls == 1 && flag == 0) {
 762                 pr_debug("Skipping cache_dynamic_acls=0 when"
 763                         " generate_node_acls=1\n");
 764                 return 0;
 765         }
 766
 767         a->cache_dynamic_acls = flag;
 768         pr_debug("iSCSI_TPG[%hu] - Cache Dynamic Initiator Portal Group"
 769                 " ACLs %s\n", tpg->tpgt, (a->cache_dynamic_acls) ?
 770                 "Enabled" : "Disabled");
 771
 772         return 0;
 773 }
 774
 775 int iscsit_ta_demo_mode_write_protect(
 776         struct iscsi_portal_group *tpg,
 777         u32 flag)
 778 {
 779         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 780
 781         if ((flag != 0) && (flag != 1)) {
 782                 pr_err("Illegal value %d\n", flag);
 783                 return -EINVAL;
 784         }
 785
 786         a->demo_mode_write_protect = flag;
 787         pr_debug("iSCSI_TPG[%hu] - Demo Mode Write Protect bit: %s\n",
 788                 tpg->tpgt, (a->demo_mode_write_protect) ? "ON" : "OFF");
 789
 790         return 0;
 791 }
 792
 793 int iscsit_ta_prod_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->prod_mode_write_protect = flag;
 805         pr_debug("iSCSI_TPG[%hu] - Production Mode Write Protect bit:"
 806                 " %s\n", tpg->tpgt, (a->prod_mode_write_protect) ?
 807                 "ON" : "OFF");
 808
 809         return 0;
 810 }
 811
 812 int iscsit_ta_demo_mode_discovery(
 813         struct iscsi_portal_group *tpg,
 814         u32 flag)
 815 {
 816         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 817
 818         if ((flag != 0) && (flag != 1)) {
 819                 pr_err("Illegal value %d\n", flag);
 820                 return -EINVAL;
 821         }
 822
 823         a->demo_mode_discovery = flag;
 824         pr_debug("iSCSI_TPG[%hu] - Demo Mode Discovery bit:"
 825                 " %s\n", tpg->tpgt, (a->demo_mode_discovery) ?
 826                 "ON" : "OFF");
 827
 828         return 0;
 829 }
 830
 831 int iscsit_ta_default_erl(
 832         struct iscsi_portal_group *tpg,
 833         u32 default_erl)
 834 {
 835         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 836
 837         if ((default_erl != 0) && (default_erl != 1) && (default_erl != 2)) {
 838                 pr_err("Illegal value for default_erl: %u\n", default_erl);
 839                 return -EINVAL;
 840         }
 841
 842         a->default_erl = default_erl;
 843         pr_debug("iSCSI_TPG[%hu] - DefaultERL: %u\n", tpg->tpgt, a->default_erl);
 844
 845         return 0;
 846 }
 847
 848 int iscsit_ta_t10_pi(
 849         struct iscsi_portal_group *tpg,
 850         u32 flag)
 851 {
 852         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 853
 854         if ((flag != 0) && (flag != 1)) {
 855                 pr_err("Illegal value %d\n", flag);
 856                 return -EINVAL;
 857         }
 858
 859         a->t10_pi = flag;
 860         pr_debug("iSCSI_TPG[%hu] - T10 Protection information bit:"
 861                 " %s\n", tpg->tpgt, (a->t10_pi) ?
 862                 "ON" : "OFF");
 863
 864         return 0;
 865 }
 866
 867 int iscsit_ta_fabric_prot_type(
 868         struct iscsi_portal_group *tpg,
 869         u32 prot_type)
 870 {
 871         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 872
 873         if ((prot_type != 0) && (prot_type != 1) && (prot_type != 3)) {
 874                 pr_err("Illegal value for fabric_prot_type: %u\n", prot_type);
 875                 return -EINVAL;
 876         }
 877
 878         a->fabric_prot_type = prot_type;
 879         pr_debug("iSCSI_TPG[%hu] - T10 Fabric Protection Type: %u\n",
 880                  tpg->tpgt, prot_type);
 881
 882         return 0;
 883 }
 884
 885 int iscsit_ta_tpg_enabled_sendtargets(
 886         struct iscsi_portal_group *tpg,
 887         u32 flag)
 888 {
 889         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 890
 891         if ((flag != 0) && (flag != 1)) {
 892                 pr_err("Illegal value %d\n", flag);
 893                 return -EINVAL;
 894         }
 895
 896         a->tpg_enabled_sendtargets = flag;
 897         pr_debug("iSCSI_TPG[%hu] - TPG enabled bit required for SendTargets:"
 898                 " %s\n", tpg->tpgt, (a->tpg_enabled_sendtargets) ? "ON" : "OFF");
 899
 900         return 0;
 901 }