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         a->login_keys_workaround = TA_DEFAULT_LOGIN_KEYS_WORKAROUND;
 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         return -ENOMEM;
 265 }
 266
 267 int iscsit_tpg_del_portal_group(
 268         struct iscsi_tiqn *tiqn,
 269         struct iscsi_portal_group *tpg,
 270         int force)
 271 {
 272         u8 old_state = tpg->tpg_state;
 273
 274         spin_lock(&tpg->tpg_state_lock);
 275         tpg->tpg_state = TPG_STATE_INACTIVE;
 276         spin_unlock(&tpg->tpg_state_lock);
 277
 278         if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
 279                 pr_err("Unable to delete iSCSI Target Portal Group:"
 280                         " %hu while active sessions exist, and force=0\n",
 281                         tpg->tpgt);
 282                 tpg->tpg_state = old_state;
 283                 return -EPERM;
 284         }
 285
 286         if (tpg->param_list) {
 287                 iscsi_release_param_list(tpg->param_list);
 288                 tpg->param_list = NULL;
 289         }
 290
 291         core_tpg_deregister(&tpg->tpg_se_tpg);
 292
 293         spin_lock(&tpg->tpg_state_lock);
 294         tpg->tpg_state = TPG_STATE_FREE;
 295         spin_unlock(&tpg->tpg_state_lock);
 296
 297         spin_lock(&tiqn->tiqn_tpg_lock);
 298         tiqn->tiqn_ntpgs--;
 299         list_del(&tpg->tpg_list);
 300         spin_unlock(&tiqn->tiqn_tpg_lock);
 301
 302         pr_debug("CORE[%s]_TPG[%hu] - Deleted iSCSI Target Portal Group\n",
 303                         tiqn->tiqn, tpg->tpgt);
 304
 305         kfree(tpg);
 306         return 0;
 307 }
 308
 309 int iscsit_tpg_enable_portal_group(struct iscsi_portal_group *tpg)
 310 {
 311         struct iscsi_param *param;
 312         struct iscsi_tiqn *tiqn = tpg->tpg_tiqn;
 313         int ret;
 314
 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                 return -EINVAL;
 319         }
 320         /*
 321          * Make sure that AuthMethod does not contain None as an option
 322          * unless explictly disabled.  Set the default to CHAP if authentication
 323          * is enforced (as per default), and remove the NONE option.
 324          */
 325         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
 326         if (!param)
 327                 return -EINVAL;
 328
 329         if (tpg->tpg_attrib.authentication) {
 330                 if (!strcmp(param->value, NONE)) {
 331                         ret = iscsi_update_param_value(param, CHAP);
 332                         if (ret)
 333                                 goto err;
 334                 }
 335
 336                 ret = iscsit_ta_authentication(tpg, 1);
 337                 if (ret < 0)
 338                         goto err;
 339         }
 340
 341         spin_lock(&tpg->tpg_state_lock);
 342         tpg->tpg_state = TPG_STATE_ACTIVE;
 343         spin_unlock(&tpg->tpg_state_lock);
 344
 345         spin_lock(&tiqn->tiqn_tpg_lock);
 346         tiqn->tiqn_active_tpgs++;
 347         pr_debug("iSCSI_TPG[%hu] - Enabled iSCSI Target Portal Group\n",
 348                         tpg->tpgt);
 349         spin_unlock(&tiqn->tiqn_tpg_lock);
 350
 351         return 0;
 352
 353 err:
 354         return ret;
 355 }
 356
 357 int iscsit_tpg_disable_portal_group(struct iscsi_portal_group *tpg, int force)
 358 {
 359         struct iscsi_tiqn *tiqn;
 360         u8 old_state = tpg->tpg_state;
 361
 362         spin_lock(&tpg->tpg_state_lock);
 363         if (tpg->tpg_state == TPG_STATE_INACTIVE) {
 364                 pr_err("iSCSI Target Portal Group: %hu is already"
 365                         " inactive, ignoring request.\n", tpg->tpgt);
 366                 spin_unlock(&tpg->tpg_state_lock);
 367                 return -EINVAL;
 368         }
 369         tpg->tpg_state = TPG_STATE_INACTIVE;
 370         spin_unlock(&tpg->tpg_state_lock);
 371
 372         iscsit_clear_tpg_np_login_threads(tpg, false);
 373
 374         if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
 375                 spin_lock(&tpg->tpg_state_lock);
 376                 tpg->tpg_state = old_state;
 377                 spin_unlock(&tpg->tpg_state_lock);
 378                 pr_err("Unable to disable iSCSI Target Portal Group:"
 379                         " %hu while active sessions exist, and force=0\n",
 380                         tpg->tpgt);
 381                 return -EPERM;
 382         }
 383
 384         tiqn = tpg->tpg_tiqn;
 385         if (!tiqn || (tpg == iscsit_global->discovery_tpg))
 386                 return 0;
 387
 388         spin_lock(&tiqn->tiqn_tpg_lock);
 389         tiqn->tiqn_active_tpgs--;
 390         pr_debug("iSCSI_TPG[%hu] - Disabled iSCSI Target Portal Group\n",
 391                         tpg->tpgt);
 392         spin_unlock(&tiqn->tiqn_tpg_lock);
 393
 394         return 0;
 395 }
 396
 397 struct iscsi_node_attrib *iscsit_tpg_get_node_attrib(
 398         struct iscsi_session *sess)
 399 {
 400         struct se_session *se_sess = sess->se_sess;
 401         struct se_node_acl *se_nacl = se_sess->se_node_acl;
 402         struct iscsi_node_acl *acl = container_of(se_nacl, struct iscsi_node_acl,
 403                                         se_node_acl);
 404
 405         return &acl->node_attrib;
 406 }
 407
 408 struct iscsi_tpg_np *iscsit_tpg_locate_child_np(
 409         struct iscsi_tpg_np *tpg_np,
 410         int network_transport)
 411 {
 412         struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
 413
 414         spin_lock(&tpg_np->tpg_np_parent_lock);
 415         list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
 416                         &tpg_np->tpg_np_parent_list, tpg_np_child_list) {
 417                 if (tpg_np_child->tpg_np->np_network_transport ==
 418                                 network_transport) {
 419                         spin_unlock(&tpg_np->tpg_np_parent_lock);
 420                         return tpg_np_child;
 421                 }
 422         }
 423         spin_unlock(&tpg_np->tpg_np_parent_lock);
 424
 425         return NULL;
 426 }
 427
 428 static bool iscsit_tpg_check_network_portal(
 429         struct iscsi_tiqn *tiqn,
 430         struct sockaddr_storage *sockaddr,
 431         int network_transport)
 432 {
 433         struct iscsi_portal_group *tpg;
 434         struct iscsi_tpg_np *tpg_np;
 435         struct iscsi_np *np;
 436         bool match = false;
 437
 438         spin_lock(&tiqn->tiqn_tpg_lock);
 439         list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) {
 440
 441                 spin_lock(&tpg->tpg_np_lock);
 442                 list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
 443                         np = tpg_np->tpg_np;
 444
 445                         match = iscsit_check_np_match(sockaddr, np,
 446                                                 network_transport);
 447                         if (match)
 448                                 break;
 449                 }
 450                 spin_unlock(&tpg->tpg_np_lock);
 451         }
 452         spin_unlock(&tiqn->tiqn_tpg_lock);
 453
 454         return match;
 455 }
 456
 457 struct iscsi_tpg_np *iscsit_tpg_add_network_portal(
 458         struct iscsi_portal_group *tpg,
 459         struct sockaddr_storage *sockaddr,
 460         struct iscsi_tpg_np *tpg_np_parent,
 461         int network_transport)
 462 {
 463         struct iscsi_np *np;
 464         struct iscsi_tpg_np *tpg_np;
 465
 466         if (!tpg_np_parent) {
 467                 if (iscsit_tpg_check_network_portal(tpg->tpg_tiqn, sockaddr,
 468                                 network_transport)) {
 469                         pr_err("Network Portal: %pISc already exists on a"
 470                                 " different TPG on %s\n", sockaddr,
 471                                 tpg->tpg_tiqn->tiqn);
 472                         return ERR_PTR(-EEXIST);
 473                 }
 474         }
 475
 476         tpg_np = kzalloc(sizeof(struct iscsi_tpg_np), GFP_KERNEL);
 477         if (!tpg_np) {
 478                 pr_err("Unable to allocate memory for"
 479                                 " struct iscsi_tpg_np.\n");
 480                 return ERR_PTR(-ENOMEM);
 481         }
 482
 483         np = iscsit_add_np(sockaddr, network_transport);
 484         if (IS_ERR(np)) {
 485                 kfree(tpg_np);
 486                 return ERR_CAST(np);
 487         }
 488
 489         INIT_LIST_HEAD(&tpg_np->tpg_np_list);
 490         INIT_LIST_HEAD(&tpg_np->tpg_np_child_list);
 491         INIT_LIST_HEAD(&tpg_np->tpg_np_parent_list);
 492         spin_lock_init(&tpg_np->tpg_np_parent_lock);
 493         init_completion(&tpg_np->tpg_np_comp);
 494         kref_init(&tpg_np->tpg_np_kref);
 495         tpg_np->tpg_np          = np;
 496         tpg_np->tpg             = tpg;
 497
 498         spin_lock(&tpg->tpg_np_lock);
 499         list_add_tail(&tpg_np->tpg_np_list, &tpg->tpg_gnp_list);
 500         tpg->num_tpg_nps++;
 501         if (tpg->tpg_tiqn)
 502                 tpg->tpg_tiqn->tiqn_num_tpg_nps++;
 503         spin_unlock(&tpg->tpg_np_lock);
 504
 505         if (tpg_np_parent) {
 506                 tpg_np->tpg_np_parent = tpg_np_parent;
 507                 spin_lock(&tpg_np_parent->tpg_np_parent_lock);
 508                 list_add_tail(&tpg_np->tpg_np_child_list,
 509                         &tpg_np_parent->tpg_np_parent_list);
 510                 spin_unlock(&tpg_np_parent->tpg_np_parent_lock);
 511         }
 512
 513         pr_debug("CORE[%s] - Added Network Portal: %pISpc,%hu on %s\n",
 514                 tpg->tpg_tiqn->tiqn, &np->np_sockaddr, tpg->tpgt,
 515                 np->np_transport->name);
 516
 517         return tpg_np;
 518 }
 519
 520 static int iscsit_tpg_release_np(
 521         struct iscsi_tpg_np *tpg_np,
 522         struct iscsi_portal_group *tpg,
 523         struct iscsi_np *np)
 524 {
 525         iscsit_clear_tpg_np_login_thread(tpg_np, tpg, true);
 526
 527         pr_debug("CORE[%s] - Removed Network Portal: %pISpc,%hu on %s\n",
 528                 tpg->tpg_tiqn->tiqn, &np->np_sockaddr, tpg->tpgt,
 529                 np->np_transport->name);
 530
 531         tpg_np->tpg_np = NULL;
 532         tpg_np->tpg = NULL;
 533         kfree(tpg_np);
 534         /*
 535          * iscsit_del_np() will shutdown struct iscsi_np when last TPG reference is released.
 536          */
 537         return iscsit_del_np(np);
 538 }
 539
 540 int iscsit_tpg_del_network_portal(
 541         struct iscsi_portal_group *tpg,
 542         struct iscsi_tpg_np *tpg_np)
 543 {
 544         struct iscsi_np *np;
 545         struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
 546         int ret = 0;
 547
 548         np = tpg_np->tpg_np;
 549         if (!np) {
 550                 pr_err("Unable to locate struct iscsi_np from"
 551                                 " struct iscsi_tpg_np\n");
 552                 return -EINVAL;
 553         }
 554
 555         if (!tpg_np->tpg_np_parent) {
 556                 /*
 557                  * We are the parent tpg network portal.  Release all of the
 558                  * child tpg_np's (eg: the non ISCSI_TCP ones) on our parent
 559                  * list first.
 560                  */
 561                 list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
 562                                 &tpg_np->tpg_np_parent_list,
 563                                 tpg_np_child_list) {
 564                         ret = iscsit_tpg_del_network_portal(tpg, tpg_np_child);
 565                         if (ret < 0)
 566                                 pr_err("iscsit_tpg_del_network_portal()"
 567                                         " failed: %d\n", ret);
 568                 }
 569         } else {
 570                 /*
 571                  * We are not the parent ISCSI_TCP tpg network portal.  Release
 572                  * our own network portals from the child list.
 573                  */
 574                 spin_lock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
 575                 list_del(&tpg_np->tpg_np_child_list);
 576                 spin_unlock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
 577         }
 578
 579         spin_lock(&tpg->tpg_np_lock);
 580         list_del(&tpg_np->tpg_np_list);
 581         tpg->num_tpg_nps--;
 582         if (tpg->tpg_tiqn)
 583                 tpg->tpg_tiqn->tiqn_num_tpg_nps--;
 584         spin_unlock(&tpg->tpg_np_lock);
 585
 586         return iscsit_tpg_release_np(tpg_np, tpg, np);
 587 }
 588
 589 int iscsit_ta_authentication(struct iscsi_portal_group *tpg, u32 authentication)
 590 {
 591         unsigned char buf1[256], buf2[256], *none = NULL;
 592         int len;
 593         struct iscsi_param *param;
 594         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 595
 596         if ((authentication != 1) && (authentication != 0)) {
 597                 pr_err("Illegal value for authentication parameter:"
 598                         " %u, ignoring request.\n", authentication);
 599                 return -EINVAL;
 600         }
 601
 602         memset(buf1, 0, sizeof(buf1));
 603         memset(buf2, 0, sizeof(buf2));
 604
 605         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
 606         if (!param)
 607                 return -EINVAL;
 608
 609         if (authentication) {
 610                 snprintf(buf1, sizeof(buf1), "%s", param->value);
 611                 none = strstr(buf1, NONE);
 612                 if (!none)
 613                         goto out;
 614                 if (!strncmp(none + 4, ",", 1)) {
 615                         if (!strcmp(buf1, none))
 616                                 sprintf(buf2, "%s", none+5);
 617                         else {
 618                                 none--;
 619                                 *none = '\0';
 620                                 len = sprintf(buf2, "%s", buf1);
 621                                 none += 5;
 622                                 sprintf(buf2 + len, "%s", none);
 623                         }
 624                 } else {
 625                         none--;
 626                         *none = '\0';
 627                         sprintf(buf2, "%s", buf1);
 628                 }
 629                 if (iscsi_update_param_value(param, buf2) < 0)
 630                         return -EINVAL;
 631         } else {
 632                 snprintf(buf1, sizeof(buf1), "%s", param->value);
 633                 none = strstr(buf1, NONE);
 634                 if (none)
 635                         goto out;
 636                 strncat(buf1, ",", strlen(","));
 637                 strncat(buf1, NONE, strlen(NONE));
 638                 if (iscsi_update_param_value(param, buf1) < 0)
 639                         return -EINVAL;
 640         }
 641
 642 out:
 643         a->authentication = authentication;
 644         pr_debug("%s iSCSI Authentication Methods for TPG: %hu.\n",
 645                 a->authentication ? "Enforcing" : "Disabling", tpg->tpgt);
 646
 647         return 0;
 648 }
 649
 650 int iscsit_ta_login_timeout(
 651         struct iscsi_portal_group *tpg,
 652         u32 login_timeout)
 653 {
 654         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 655
 656         if (login_timeout > TA_LOGIN_TIMEOUT_MAX) {
 657                 pr_err("Requested Login Timeout %u larger than maximum"
 658                         " %u\n", login_timeout, TA_LOGIN_TIMEOUT_MAX);
 659                 return -EINVAL;
 660         } else if (login_timeout < TA_LOGIN_TIMEOUT_MIN) {
 661                 pr_err("Requested Logout Timeout %u smaller than"
 662                         " minimum %u\n", login_timeout, TA_LOGIN_TIMEOUT_MIN);
 663                 return -EINVAL;
 664         }
 665
 666         a->login_timeout = login_timeout;
 667         pr_debug("Set Logout Timeout to %u for Target Portal Group"
 668                 " %hu\n", a->login_timeout, tpg->tpgt);
 669
 670         return 0;
 671 }
 672
 673 int iscsit_ta_netif_timeout(
 674         struct iscsi_portal_group *tpg,
 675         u32 netif_timeout)
 676 {
 677         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 678
 679         if (netif_timeout > TA_NETIF_TIMEOUT_MAX) {
 680                 pr_err("Requested Network Interface Timeout %u larger"
 681                         " than maximum %u\n", netif_timeout,
 682                                 TA_NETIF_TIMEOUT_MAX);
 683                 return -EINVAL;
 684         } else if (netif_timeout < TA_NETIF_TIMEOUT_MIN) {
 685                 pr_err("Requested Network Interface Timeout %u smaller"
 686                         " than minimum %u\n", netif_timeout,
 687                                 TA_NETIF_TIMEOUT_MIN);
 688                 return -EINVAL;
 689         }
 690
 691         a->netif_timeout = netif_timeout;
 692         pr_debug("Set Network Interface Timeout to %u for"
 693                 " Target Portal Group %hu\n", a->netif_timeout, tpg->tpgt);
 694
 695         return 0;
 696 }
 697
 698 int iscsit_ta_generate_node_acls(
 699         struct iscsi_portal_group *tpg,
 700         u32 flag)
 701 {
 702         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 703
 704         if ((flag != 0) && (flag != 1)) {
 705                 pr_err("Illegal value %d\n", flag);
 706                 return -EINVAL;
 707         }
 708
 709         a->generate_node_acls = flag;
 710         pr_debug("iSCSI_TPG[%hu] - Generate Initiator Portal Group ACLs: %s\n",
 711                 tpg->tpgt, (a->generate_node_acls) ? "Enabled" : "Disabled");
 712
 713         if (flag == 1 && a->cache_dynamic_acls == 0) {
 714                 pr_debug("Explicitly setting cache_dynamic_acls=1 when "
 715                         "generate_node_acls=1\n");
 716                 a->cache_dynamic_acls = 1;
 717         }
 718
 719         return 0;
 720 }
 721
 722 int iscsit_ta_default_cmdsn_depth(
 723         struct iscsi_portal_group *tpg,
 724         u32 tcq_depth)
 725 {
 726         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 727
 728         if (tcq_depth > TA_DEFAULT_CMDSN_DEPTH_MAX) {
 729                 pr_err("Requested Default Queue Depth: %u larger"
 730                         " than maximum %u\n", tcq_depth,
 731                                 TA_DEFAULT_CMDSN_DEPTH_MAX);
 732                 return -EINVAL;
 733         } else if (tcq_depth < TA_DEFAULT_CMDSN_DEPTH_MIN) {
 734                 pr_err("Requested Default Queue Depth: %u smaller"
 735                         " than minimum %u\n", tcq_depth,
 736                                 TA_DEFAULT_CMDSN_DEPTH_MIN);
 737                 return -EINVAL;
 738         }
 739
 740         a->default_cmdsn_depth = tcq_depth;
 741         pr_debug("iSCSI_TPG[%hu] - Set Default CmdSN TCQ Depth to %u\n",
 742                 tpg->tpgt, a->default_cmdsn_depth);
 743
 744         return 0;
 745 }
 746
 747 int iscsit_ta_cache_dynamic_acls(
 748         struct iscsi_portal_group *tpg,
 749         u32 flag)
 750 {
 751         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 752
 753         if ((flag != 0) && (flag != 1)) {
 754                 pr_err("Illegal value %d\n", flag);
 755                 return -EINVAL;
 756         }
 757
 758         if (a->generate_node_acls == 1 && flag == 0) {
 759                 pr_debug("Skipping cache_dynamic_acls=0 when"
 760                         " generate_node_acls=1\n");
 761                 return 0;
 762         }
 763
 764         a->cache_dynamic_acls = flag;
 765         pr_debug("iSCSI_TPG[%hu] - Cache Dynamic Initiator Portal Group"
 766                 " ACLs %s\n", tpg->tpgt, (a->cache_dynamic_acls) ?
 767                 "Enabled" : "Disabled");
 768
 769         return 0;
 770 }
 771
 772 int iscsit_ta_demo_mode_write_protect(
 773         struct iscsi_portal_group *tpg,
 774         u32 flag)
 775 {
 776         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 777
 778         if ((flag != 0) && (flag != 1)) {
 779                 pr_err("Illegal value %d\n", flag);
 780                 return -EINVAL;
 781         }
 782
 783         a->demo_mode_write_protect = flag;
 784         pr_debug("iSCSI_TPG[%hu] - Demo Mode Write Protect bit: %s\n",
 785                 tpg->tpgt, (a->demo_mode_write_protect) ? "ON" : "OFF");
 786
 787         return 0;
 788 }
 789
 790 int iscsit_ta_prod_mode_write_protect(
 791         struct iscsi_portal_group *tpg,
 792         u32 flag)
 793 {
 794         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 795
 796         if ((flag != 0) && (flag != 1)) {
 797                 pr_err("Illegal value %d\n", flag);
 798                 return -EINVAL;
 799         }
 800
 801         a->prod_mode_write_protect = flag;
 802         pr_debug("iSCSI_TPG[%hu] - Production Mode Write Protect bit:"
 803                 " %s\n", tpg->tpgt, (a->prod_mode_write_protect) ?
 804                 "ON" : "OFF");
 805
 806         return 0;
 807 }
 808
 809 int iscsit_ta_demo_mode_discovery(
 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->demo_mode_discovery = flag;
 821         pr_debug("iSCSI_TPG[%hu] - Demo Mode Discovery bit:"
 822                 " %s\n", tpg->tpgt, (a->demo_mode_discovery) ?
 823                 "ON" : "OFF");
 824
 825         return 0;
 826 }
 827
 828 int iscsit_ta_default_erl(
 829         struct iscsi_portal_group *tpg,
 830         u32 default_erl)
 831 {
 832         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 833
 834         if ((default_erl != 0) && (default_erl != 1) && (default_erl != 2)) {
 835                 pr_err("Illegal value for default_erl: %u\n", default_erl);
 836                 return -EINVAL;
 837         }
 838
 839         a->default_erl = default_erl;
 840         pr_debug("iSCSI_TPG[%hu] - DefaultERL: %u\n", tpg->tpgt, a->default_erl);
 841
 842         return 0;
 843 }
 844
 845 int iscsit_ta_t10_pi(
 846         struct iscsi_portal_group *tpg,
 847         u32 flag)
 848 {
 849         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 850
 851         if ((flag != 0) && (flag != 1)) {
 852                 pr_err("Illegal value %d\n", flag);
 853                 return -EINVAL;
 854         }
 855
 856         a->t10_pi = flag;
 857         pr_debug("iSCSI_TPG[%hu] - T10 Protection information bit:"
 858                 " %s\n", tpg->tpgt, (a->t10_pi) ?
 859                 "ON" : "OFF");
 860
 861         return 0;
 862 }
 863
 864 int iscsit_ta_fabric_prot_type(
 865         struct iscsi_portal_group *tpg,
 866         u32 prot_type)
 867 {
 868         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 869
 870         if ((prot_type != 0) && (prot_type != 1) && (prot_type != 3)) {
 871                 pr_err("Illegal value for fabric_prot_type: %u\n", prot_type);
 872                 return -EINVAL;
 873         }
 874
 875         a->fabric_prot_type = prot_type;
 876         pr_debug("iSCSI_TPG[%hu] - T10 Fabric Protection Type: %u\n",
 877                  tpg->tpgt, prot_type);
 878
 879         return 0;
 880 }
 881
 882 int iscsit_ta_tpg_enabled_sendtargets(
 883         struct iscsi_portal_group *tpg,
 884         u32 flag)
 885 {
 886         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 887
 888         if ((flag != 0) && (flag != 1)) {
 889                 pr_err("Illegal value %d\n", flag);
 890                 return -EINVAL;
 891         }
 892
 893         a->tpg_enabled_sendtargets = flag;
 894         pr_debug("iSCSI_TPG[%hu] - TPG enabled bit required for SendTargets:"
 895                 " %s\n", tpg->tpgt, (a->tpg_enabled_sendtargets) ? "ON" : "OFF");
 896
 897         return 0;
 898 }
 899
 900 int iscsit_ta_login_keys_workaround(
 901         struct iscsi_portal_group *tpg,
 902         u32 flag)
 903 {
 904         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 905
 906         if ((flag != 0) && (flag != 1)) {
 907                 pr_err("Illegal value %d\n", flag);
 908                 return -EINVAL;
 909         }
 910
 911         a->login_keys_workaround = flag;
 912         pr_debug("iSCSI_TPG[%hu] - TPG enabled bit for login keys workaround: %s ",
 913                 tpg->tpgt, (a->login_keys_workaround) ? "ON" : "OFF");
 914
 915         return 0;
 916 }