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
  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         spin_lock(&tpg->tpg_state_lock);
 316         if (tpg->tpg_state == TPG_STATE_ACTIVE) {
 317                 pr_err("iSCSI target portal group: %hu is already"
 318                         " active, ignoring request.\n", tpg->tpgt);
 319                 spin_unlock(&tpg->tpg_state_lock);
 320                 return -EINVAL;
 321         }
 322         /*
 323          * Make sure that AuthMethod does not contain None as an option
 324          * unless explictly disabled.  Set the default to CHAP if authentication
 325          * is enforced (as per default), and remove the NONE option.
 326          */
 327         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
 328         if (!param) {
 329                 spin_unlock(&tpg->tpg_state_lock);
 330                 return -EINVAL;
 331         }
 332
 333         if (tpg->tpg_attrib.authentication) {
 334                 if (!strcmp(param->value, NONE)) {
 335                         ret = iscsi_update_param_value(param, CHAP);
 336                         if (ret)
 337                                 goto err;
 338                 }
 339
 340                 ret = iscsit_ta_authentication(tpg, 1);
 341                 if (ret < 0)
 342                         goto err;
 343         }
 344
 345         tpg->tpg_state = TPG_STATE_ACTIVE;
 346         spin_unlock(&tpg->tpg_state_lock);
 347
 348         spin_lock(&tiqn->tiqn_tpg_lock);
 349         tiqn->tiqn_active_tpgs++;
 350         pr_debug("iSCSI_TPG[%hu] - Enabled iSCSI Target Portal Group\n",
 351                         tpg->tpgt);
 352         spin_unlock(&tiqn->tiqn_tpg_lock);
 353
 354         return 0;
 355
 356 err:
 357         spin_unlock(&tpg->tpg_state_lock);
 358         return ret;
 359 }
 360
 361 int iscsit_tpg_disable_portal_group(struct iscsi_portal_group *tpg, int force)
 362 {
 363         struct iscsi_tiqn *tiqn;
 364         u8 old_state = tpg->tpg_state;
 365
 366         spin_lock(&tpg->tpg_state_lock);
 367         if (tpg->tpg_state == TPG_STATE_INACTIVE) {
 368                 pr_err("iSCSI Target Portal Group: %hu is already"
 369                         " inactive, ignoring request.\n", tpg->tpgt);
 370                 spin_unlock(&tpg->tpg_state_lock);
 371                 return -EINVAL;
 372         }
 373         tpg->tpg_state = TPG_STATE_INACTIVE;
 374         spin_unlock(&tpg->tpg_state_lock);
 375
 376         iscsit_clear_tpg_np_login_threads(tpg, false);
 377
 378         if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
 379                 spin_lock(&tpg->tpg_state_lock);
 380                 tpg->tpg_state = old_state;
 381                 spin_unlock(&tpg->tpg_state_lock);
 382                 pr_err("Unable to disable iSCSI Target Portal Group:"
 383                         " %hu while active sessions exist, and force=0\n",
 384                         tpg->tpgt);
 385                 return -EPERM;
 386         }
 387
 388         tiqn = tpg->tpg_tiqn;
 389         if (!tiqn || (tpg == iscsit_global->discovery_tpg))
 390                 return 0;
 391
 392         spin_lock(&tiqn->tiqn_tpg_lock);
 393         tiqn->tiqn_active_tpgs--;
 394         pr_debug("iSCSI_TPG[%hu] - Disabled iSCSI Target Portal Group\n",
 395                         tpg->tpgt);
 396         spin_unlock(&tiqn->tiqn_tpg_lock);
 397
 398         return 0;
 399 }
 400
 401 struct iscsi_node_attrib *iscsit_tpg_get_node_attrib(
 402         struct iscsi_session *sess)
 403 {
 404         struct se_session *se_sess = sess->se_sess;
 405         struct se_node_acl *se_nacl = se_sess->se_node_acl;
 406         struct iscsi_node_acl *acl = container_of(se_nacl, struct iscsi_node_acl,
 407                                         se_node_acl);
 408
 409         return &acl->node_attrib;
 410 }
 411
 412 struct iscsi_tpg_np *iscsit_tpg_locate_child_np(
 413         struct iscsi_tpg_np *tpg_np,
 414         int network_transport)
 415 {
 416         struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
 417
 418         spin_lock(&tpg_np->tpg_np_parent_lock);
 419         list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
 420                         &tpg_np->tpg_np_parent_list, tpg_np_child_list) {
 421                 if (tpg_np_child->tpg_np->np_network_transport ==
 422                                 network_transport) {
 423                         spin_unlock(&tpg_np->tpg_np_parent_lock);
 424                         return tpg_np_child;
 425                 }
 426         }
 427         spin_unlock(&tpg_np->tpg_np_parent_lock);
 428
 429         return NULL;
 430 }
 431
 432 static bool iscsit_tpg_check_network_portal(
 433         struct iscsi_tiqn *tiqn,
 434         struct sockaddr_storage *sockaddr,
 435         int network_transport)
 436 {
 437         struct iscsi_portal_group *tpg;
 438         struct iscsi_tpg_np *tpg_np;
 439         struct iscsi_np *np;
 440         bool match = false;
 441
 442         spin_lock(&tiqn->tiqn_tpg_lock);
 443         list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) {
 444
 445                 spin_lock(&tpg->tpg_np_lock);
 446                 list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
 447                         np = tpg_np->tpg_np;
 448
 449                         match = iscsit_check_np_match(sockaddr, np,
 450                                                 network_transport);
 451                         if (match)
 452                                 break;
 453                 }
 454                 spin_unlock(&tpg->tpg_np_lock);
 455
 456                 if (match)
 457                         break;
 458         }
 459         spin_unlock(&tiqn->tiqn_tpg_lock);
 460
 461         return match;
 462 }
 463
 464 struct iscsi_tpg_np *iscsit_tpg_add_network_portal(
 465         struct iscsi_portal_group *tpg,
 466         struct sockaddr_storage *sockaddr,
 467         struct iscsi_tpg_np *tpg_np_parent,
 468         int network_transport)
 469 {
 470         struct iscsi_np *np;
 471         struct iscsi_tpg_np *tpg_np;
 472
 473         if (!tpg_np_parent) {
 474                 if (iscsit_tpg_check_network_portal(tpg->tpg_tiqn, sockaddr,
 475                                 network_transport)) {
 476                         pr_err("Network Portal: %pISc already exists on a"
 477                                 " different TPG on %s\n", sockaddr,
 478                                 tpg->tpg_tiqn->tiqn);
 479                         return ERR_PTR(-EEXIST);
 480                 }
 481         }
 482
 483         tpg_np = kzalloc(sizeof(struct iscsi_tpg_np), GFP_KERNEL);
 484         if (!tpg_np) {
 485                 pr_err("Unable to allocate memory for"
 486                                 " struct iscsi_tpg_np.\n");
 487                 return ERR_PTR(-ENOMEM);
 488         }
 489
 490         np = iscsit_add_np(sockaddr, network_transport);
 491         if (IS_ERR(np)) {
 492                 kfree(tpg_np);
 493                 return ERR_CAST(np);
 494         }
 495
 496         INIT_LIST_HEAD(&tpg_np->tpg_np_list);
 497         INIT_LIST_HEAD(&tpg_np->tpg_np_child_list);
 498         INIT_LIST_HEAD(&tpg_np->tpg_np_parent_list);
 499         spin_lock_init(&tpg_np->tpg_np_parent_lock);
 500         init_completion(&tpg_np->tpg_np_comp);
 501         kref_init(&tpg_np->tpg_np_kref);
 502         tpg_np->tpg_np          = np;
 503         tpg_np->tpg             = tpg;
 504
 505         spin_lock(&tpg->tpg_np_lock);
 506         list_add_tail(&tpg_np->tpg_np_list, &tpg->tpg_gnp_list);
 507         tpg->num_tpg_nps++;
 508         if (tpg->tpg_tiqn)
 509                 tpg->tpg_tiqn->tiqn_num_tpg_nps++;
 510         spin_unlock(&tpg->tpg_np_lock);
 511
 512         if (tpg_np_parent) {
 513                 tpg_np->tpg_np_parent = tpg_np_parent;
 514                 spin_lock(&tpg_np_parent->tpg_np_parent_lock);
 515                 list_add_tail(&tpg_np->tpg_np_child_list,
 516                         &tpg_np_parent->tpg_np_parent_list);
 517                 spin_unlock(&tpg_np_parent->tpg_np_parent_lock);
 518         }
 519
 520         pr_debug("CORE[%s] - Added Network Portal: %pISpc,%hu on %s\n",
 521                 tpg->tpg_tiqn->tiqn, &np->np_sockaddr, tpg->tpgt,
 522                 np->np_transport->name);
 523
 524         return tpg_np;
 525 }
 526
 527 static int iscsit_tpg_release_np(
 528         struct iscsi_tpg_np *tpg_np,
 529         struct iscsi_portal_group *tpg,
 530         struct iscsi_np *np)
 531 {
 532         iscsit_clear_tpg_np_login_thread(tpg_np, tpg, true);
 533
 534         pr_debug("CORE[%s] - Removed Network Portal: %pISpc,%hu on %s\n",
 535                 tpg->tpg_tiqn->tiqn, &np->np_sockaddr, tpg->tpgt,
 536                 np->np_transport->name);
 537
 538         tpg_np->tpg_np = NULL;
 539         tpg_np->tpg = NULL;
 540         kfree(tpg_np);
 541         /*
 542          * iscsit_del_np() will shutdown struct iscsi_np when last TPG reference is released.
 543          */
 544         return iscsit_del_np(np);
 545 }
 546
 547 int iscsit_tpg_del_network_portal(
 548         struct iscsi_portal_group *tpg,
 549         struct iscsi_tpg_np *tpg_np)
 550 {
 551         struct iscsi_np *np;
 552         struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
 553         int ret = 0;
 554
 555         np = tpg_np->tpg_np;
 556         if (!np) {
 557                 pr_err("Unable to locate struct iscsi_np from"
 558                                 " struct iscsi_tpg_np\n");
 559                 return -EINVAL;
 560         }
 561
 562         if (!tpg_np->tpg_np_parent) {
 563                 /*
 564                  * We are the parent tpg network portal.  Release all of the
 565                  * child tpg_np's (eg: the non ISCSI_TCP ones) on our parent
 566                  * list first.
 567                  */
 568                 list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
 569                                 &tpg_np->tpg_np_parent_list,
 570                                 tpg_np_child_list) {
 571                         ret = iscsit_tpg_del_network_portal(tpg, tpg_np_child);
 572                         if (ret < 0)
 573                                 pr_err("iscsit_tpg_del_network_portal()"
 574                                         " failed: %d\n", ret);
 575                 }
 576         } else {
 577                 /*
 578                  * We are not the parent ISCSI_TCP tpg network portal.  Release
 579                  * our own network portals from the child list.
 580                  */
 581                 spin_lock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
 582                 list_del(&tpg_np->tpg_np_child_list);
 583                 spin_unlock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
 584         }
 585
 586         spin_lock(&tpg->tpg_np_lock);
 587         list_del(&tpg_np->tpg_np_list);
 588         tpg->num_tpg_nps--;
 589         if (tpg->tpg_tiqn)
 590                 tpg->tpg_tiqn->tiqn_num_tpg_nps--;
 591         spin_unlock(&tpg->tpg_np_lock);
 592
 593         return iscsit_tpg_release_np(tpg_np, tpg, np);
 594 }
 595
 596 int iscsit_ta_authentication(struct iscsi_portal_group *tpg, u32 authentication)
 597 {
 598         unsigned char buf1[256], buf2[256], *none = NULL;
 599         int len;
 600         struct iscsi_param *param;
 601         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 602
 603         if ((authentication != 1) && (authentication != 0)) {
 604                 pr_err("Illegal value for authentication parameter:"
 605                         " %u, ignoring request.\n", authentication);
 606                 return -EINVAL;
 607         }
 608
 609         memset(buf1, 0, sizeof(buf1));
 610         memset(buf2, 0, sizeof(buf2));
 611
 612         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
 613         if (!param)
 614                 return -EINVAL;
 615
 616         if (authentication) {
 617                 snprintf(buf1, sizeof(buf1), "%s", param->value);
 618                 none = strstr(buf1, NONE);
 619                 if (!none)
 620                         goto out;
 621                 if (!strncmp(none + 4, ",", 1)) {
 622                         if (!strcmp(buf1, none))
 623                                 sprintf(buf2, "%s", none+5);
 624                         else {
 625                                 none--;
 626                                 *none = '\0';
 627                                 len = sprintf(buf2, "%s", buf1);
 628                                 none += 5;
 629                                 sprintf(buf2 + len, "%s", none);
 630                         }
 631                 } else {
 632                         none--;
 633                         *none = '\0';
 634                         sprintf(buf2, "%s", buf1);
 635                 }
 636                 if (iscsi_update_param_value(param, buf2) < 0)
 637                         return -EINVAL;
 638         } else {
 639                 snprintf(buf1, sizeof(buf1), "%s", param->value);
 640                 none = strstr(buf1, NONE);
 641                 if (none)
 642                         goto out;
 643                 strlcat(buf1, "," NONE, sizeof(buf1));
 644                 if (iscsi_update_param_value(param, buf1) < 0)
 645                         return -EINVAL;
 646         }
 647
 648 out:
 649         a->authentication = authentication;
 650         pr_debug("%s iSCSI Authentication Methods for TPG: %hu.\n",
 651                 a->authentication ? "Enforcing" : "Disabling", tpg->tpgt);
 652
 653         return 0;
 654 }
 655
 656 int iscsit_ta_login_timeout(
 657         struct iscsi_portal_group *tpg,
 658         u32 login_timeout)
 659 {
 660         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 661
 662         if (login_timeout > TA_LOGIN_TIMEOUT_MAX) {
 663                 pr_err("Requested Login Timeout %u larger than maximum"
 664                         " %u\n", login_timeout, TA_LOGIN_TIMEOUT_MAX);
 665                 return -EINVAL;
 666         } else if (login_timeout < TA_LOGIN_TIMEOUT_MIN) {
 667                 pr_err("Requested Logout Timeout %u smaller than"
 668                         " minimum %u\n", login_timeout, TA_LOGIN_TIMEOUT_MIN);
 669                 return -EINVAL;
 670         }
 671
 672         a->login_timeout = login_timeout;
 673         pr_debug("Set Logout Timeout to %u for Target Portal Group"
 674                 " %hu\n", a->login_timeout, tpg->tpgt);
 675
 676         return 0;
 677 }
 678
 679 int iscsit_ta_netif_timeout(
 680         struct iscsi_portal_group *tpg,
 681         u32 netif_timeout)
 682 {
 683         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 684
 685         if (netif_timeout > TA_NETIF_TIMEOUT_MAX) {
 686                 pr_err("Requested Network Interface Timeout %u larger"
 687                         " than maximum %u\n", netif_timeout,
 688                                 TA_NETIF_TIMEOUT_MAX);
 689                 return -EINVAL;
 690         } else if (netif_timeout < TA_NETIF_TIMEOUT_MIN) {
 691                 pr_err("Requested Network Interface Timeout %u smaller"
 692                         " than minimum %u\n", netif_timeout,
 693                                 TA_NETIF_TIMEOUT_MIN);
 694                 return -EINVAL;
 695         }
 696
 697         a->netif_timeout = netif_timeout;
 698         pr_debug("Set Network Interface Timeout to %u for"
 699                 " Target Portal Group %hu\n", a->netif_timeout, tpg->tpgt);
 700
 701         return 0;
 702 }
 703
 704 int iscsit_ta_generate_node_acls(
 705         struct iscsi_portal_group *tpg,
 706         u32 flag)
 707 {
 708         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 709
 710         if ((flag != 0) && (flag != 1)) {
 711                 pr_err("Illegal value %d\n", flag);
 712                 return -EINVAL;
 713         }
 714
 715         a->generate_node_acls = flag;
 716         pr_debug("iSCSI_TPG[%hu] - Generate Initiator Portal Group ACLs: %s\n",
 717                 tpg->tpgt, (a->generate_node_acls) ? "Enabled" : "Disabled");
 718
 719         if (flag == 1 && a->cache_dynamic_acls == 0) {
 720                 pr_debug("Explicitly setting cache_dynamic_acls=1 when "
 721                         "generate_node_acls=1\n");
 722                 a->cache_dynamic_acls = 1;
 723         }
 724
 725         return 0;
 726 }
 727
 728 int iscsit_ta_default_cmdsn_depth(
 729         struct iscsi_portal_group *tpg,
 730         u32 tcq_depth)
 731 {
 732         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 733
 734         if (tcq_depth > TA_DEFAULT_CMDSN_DEPTH_MAX) {
 735                 pr_err("Requested Default Queue Depth: %u larger"
 736                         " than maximum %u\n", tcq_depth,
 737                                 TA_DEFAULT_CMDSN_DEPTH_MAX);
 738                 return -EINVAL;
 739         } else if (tcq_depth < TA_DEFAULT_CMDSN_DEPTH_MIN) {
 740                 pr_err("Requested Default Queue Depth: %u smaller"
 741                         " than minimum %u\n", tcq_depth,
 742                                 TA_DEFAULT_CMDSN_DEPTH_MIN);
 743                 return -EINVAL;
 744         }
 745
 746         a->default_cmdsn_depth = tcq_depth;
 747         pr_debug("iSCSI_TPG[%hu] - Set Default CmdSN TCQ Depth to %u\n",
 748                 tpg->tpgt, a->default_cmdsn_depth);
 749
 750         return 0;
 751 }
 752
 753 int iscsit_ta_cache_dynamic_acls(
 754         struct iscsi_portal_group *tpg,
 755         u32 flag)
 756 {
 757         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 758
 759         if ((flag != 0) && (flag != 1)) {
 760                 pr_err("Illegal value %d\n", flag);
 761                 return -EINVAL;
 762         }
 763
 764         if (a->generate_node_acls == 1 && flag == 0) {
 765                 pr_debug("Skipping cache_dynamic_acls=0 when"
 766                         " generate_node_acls=1\n");
 767                 return 0;
 768         }
 769
 770         a->cache_dynamic_acls = flag;
 771         pr_debug("iSCSI_TPG[%hu] - Cache Dynamic Initiator Portal Group"
 772                 " ACLs %s\n", tpg->tpgt, (a->cache_dynamic_acls) ?
 773                 "Enabled" : "Disabled");
 774
 775         return 0;
 776 }
 777
 778 int iscsit_ta_demo_mode_write_protect(
 779         struct iscsi_portal_group *tpg,
 780         u32 flag)
 781 {
 782         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 783
 784         if ((flag != 0) && (flag != 1)) {
 785                 pr_err("Illegal value %d\n", flag);
 786                 return -EINVAL;
 787         }
 788
 789         a->demo_mode_write_protect = flag;
 790         pr_debug("iSCSI_TPG[%hu] - Demo Mode Write Protect bit: %s\n",
 791                 tpg->tpgt, (a->demo_mode_write_protect) ? "ON" : "OFF");
 792
 793         return 0;
 794 }
 795
 796 int iscsit_ta_prod_mode_write_protect(
 797         struct iscsi_portal_group *tpg,
 798         u32 flag)
 799 {
 800         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 801
 802         if ((flag != 0) && (flag != 1)) {
 803                 pr_err("Illegal value %d\n", flag);
 804                 return -EINVAL;
 805         }
 806
 807         a->prod_mode_write_protect = flag;
 808         pr_debug("iSCSI_TPG[%hu] - Production Mode Write Protect bit:"
 809                 " %s\n", tpg->tpgt, (a->prod_mode_write_protect) ?
 810                 "ON" : "OFF");
 811
 812         return 0;
 813 }
 814
 815 int iscsit_ta_demo_mode_discovery(
 816         struct iscsi_portal_group *tpg,
 817         u32 flag)
 818 {
 819         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 820
 821         if ((flag != 0) && (flag != 1)) {
 822                 pr_err("Illegal value %d\n", flag);
 823                 return -EINVAL;
 824         }
 825
 826         a->demo_mode_discovery = flag;
 827         pr_debug("iSCSI_TPG[%hu] - Demo Mode Discovery bit:"
 828                 " %s\n", tpg->tpgt, (a->demo_mode_discovery) ?
 829                 "ON" : "OFF");
 830
 831         return 0;
 832 }
 833
 834 int iscsit_ta_default_erl(
 835         struct iscsi_portal_group *tpg,
 836         u32 default_erl)
 837 {
 838         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 839
 840         if ((default_erl != 0) && (default_erl != 1) && (default_erl != 2)) {
 841                 pr_err("Illegal value for default_erl: %u\n", default_erl);
 842                 return -EINVAL;
 843         }
 844
 845         a->default_erl = default_erl;
 846         pr_debug("iSCSI_TPG[%hu] - DefaultERL: %u\n", tpg->tpgt, a->default_erl);
 847
 848         return 0;
 849 }
 850
 851 int iscsit_ta_t10_pi(
 852         struct iscsi_portal_group *tpg,
 853         u32 flag)
 854 {
 855         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 856
 857         if ((flag != 0) && (flag != 1)) {
 858                 pr_err("Illegal value %d\n", flag);
 859                 return -EINVAL;
 860         }
 861
 862         a->t10_pi = flag;
 863         pr_debug("iSCSI_TPG[%hu] - T10 Protection information bit:"
 864                 " %s\n", tpg->tpgt, (a->t10_pi) ?
 865                 "ON" : "OFF");
 866
 867         return 0;
 868 }
 869
 870 int iscsit_ta_fabric_prot_type(
 871         struct iscsi_portal_group *tpg,
 872         u32 prot_type)
 873 {
 874         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 875
 876         if ((prot_type != 0) && (prot_type != 1) && (prot_type != 3)) {
 877                 pr_err("Illegal value for fabric_prot_type: %u\n", prot_type);
 878                 return -EINVAL;
 879         }
 880
 881         a->fabric_prot_type = prot_type;
 882         pr_debug("iSCSI_TPG[%hu] - T10 Fabric Protection Type: %u\n",
 883                  tpg->tpgt, prot_type);
 884
 885         return 0;
 886 }
 887
 888 int iscsit_ta_tpg_enabled_sendtargets(
 889         struct iscsi_portal_group *tpg,
 890         u32 flag)
 891 {
 892         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 893
 894         if ((flag != 0) && (flag != 1)) {
 895                 pr_err("Illegal value %d\n", flag);
 896                 return -EINVAL;
 897         }
 898
 899         a->tpg_enabled_sendtargets = flag;
 900         pr_debug("iSCSI_TPG[%hu] - TPG enabled bit required for SendTargets:"
 901                 " %s\n", tpg->tpgt, (a->tpg_enabled_sendtargets) ? "ON" : "OFF");
 902
 903         return 0;
 904 }
 905
 906 int iscsit_ta_login_keys_workaround(
 907         struct iscsi_portal_group *tpg,
 908         u32 flag)
 909 {
 910         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 911
 912         if ((flag != 0) && (flag != 1)) {
 913                 pr_err("Illegal value %d\n", flag);
 914                 return -EINVAL;
 915         }
 916
 917         a->login_keys_workaround = flag;
 918         pr_debug("iSCSI_TPG[%hu] - TPG enabled bit for login keys workaround: %s ",
 919                 tpg->tpgt, (a->login_keys_workaround) ? "ON" : "OFF");
 920
 921         return 0;
 922 }