drivers/target/iscsi/iscsi_target_tpg.c

   1 /*******************************************************************************
   2  * This file contains iSCSI Target Portal Group related functions.
   3  *
   4  * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
   5  *
   6  * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
   7  *
   8  * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  ******************************************************************************/
  20
  21 #include <target/target_core_base.h>
  22 #include <target/target_core_transport.h>
  23 #include <target/target_core_fabric_ops.h>
  24 #include <target/target_core_configfs.h>
  25 #include <target/target_core_tpg.h>
  26
  27 #include "iscsi_target_core.h"
  28 #include "iscsi_target_erl0.h"
  29 #include "iscsi_target_login.h"
  30 #include "iscsi_target_nodeattrib.h"
  31 #include "iscsi_target_tpg.h"
  32 #include "iscsi_target_util.h"
  33 #include "iscsi_target.h"
  34 #include "iscsi_target_parameters.h"
  35
  36 struct iscsi_portal_group *iscsit_alloc_portal_group(struct iscsi_tiqn *tiqn, u16 tpgt)
  37 {
  38         struct iscsi_portal_group *tpg;
  39
  40         tpg = kzalloc(sizeof(struct iscsi_portal_group), GFP_KERNEL);
  41         if (!tpg) {
  42                 pr_err("Unable to allocate struct iscsi_portal_group\n");
  43                 return NULL;
  44         }
  45
  46         tpg->tpgt = tpgt;
  47         tpg->tpg_state = TPG_STATE_FREE;
  48         tpg->tpg_tiqn = tiqn;
  49         INIT_LIST_HEAD(&tpg->tpg_gnp_list);
  50         INIT_LIST_HEAD(&tpg->tpg_list);
  51         mutex_init(&tpg->tpg_access_lock);
  52         mutex_init(&tpg->np_login_lock);
  53         spin_lock_init(&tpg->tpg_state_lock);
  54         spin_lock_init(&tpg->tpg_np_lock);
  55
  56         return tpg;
  57 }
  58
  59 static void iscsit_set_default_tpg_attribs(struct iscsi_portal_group *);
  60
  61 int iscsit_load_discovery_tpg(void)
  62 {
  63         struct iscsi_param *param;
  64         struct iscsi_portal_group *tpg;
  65         int ret;
  66
  67         tpg = iscsit_alloc_portal_group(NULL, 1);
  68         if (!tpg) {
  69                 pr_err("Unable to allocate struct iscsi_portal_group\n");
  70                 return -1;
  71         }
  72
  73         ret = core_tpg_register(
  74                         &lio_target_fabric_configfs->tf_ops,
  75                         NULL, &tpg->tpg_se_tpg, (void *)tpg,
  76                         TRANSPORT_TPG_TYPE_DISCOVERY);
  77         if (ret < 0) {
  78                 kfree(tpg);
  79                 return -1;
  80         }
  81
  82         tpg->sid = 1; /* First Assigned LIO Session ID */
  83         iscsit_set_default_tpg_attribs(tpg);
  84
  85         if (iscsi_create_default_params(&tpg->param_list) < 0)
  86                 goto out;
  87         /*
  88          * By default we disable authentication for discovery sessions,
  89          * this can be changed with:
  90          *
  91          * /sys/kernel/config/target/iscsi/discovery_auth/enforce_discovery_auth
  92          */
  93         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
  94         if (!param)
  95                 goto out;
  96
  97         if (iscsi_update_param_value(param, "CHAP,None") < 0)
  98                 goto out;
  99
 100         tpg->tpg_attrib.authentication = 0;
 101
 102         spin_lock(&tpg->tpg_state_lock);
 103         tpg->tpg_state  = TPG_STATE_ACTIVE;
 104         spin_unlock(&tpg->tpg_state_lock);
 105
 106         iscsit_global->discovery_tpg = tpg;
 107         pr_debug("CORE[0] - Allocated Discovery TPG\n");
 108
 109         return 0;
 110 out:
 111         if (tpg->sid == 1)
 112                 core_tpg_deregister(&tpg->tpg_se_tpg);
 113         kfree(tpg);
 114         return -1;
 115 }
 116
 117 void iscsit_release_discovery_tpg(void)
 118 {
 119         struct iscsi_portal_group *tpg = iscsit_global->discovery_tpg;
 120
 121         if (!tpg)
 122                 return;
 123
 124         core_tpg_deregister(&tpg->tpg_se_tpg);
 125
 126         kfree(tpg);
 127         iscsit_global->discovery_tpg = NULL;
 128 }
 129
 130 struct iscsi_portal_group *iscsit_get_tpg_from_np(
 131         struct iscsi_tiqn *tiqn,
 132         struct iscsi_np *np)
 133 {
 134         struct iscsi_portal_group *tpg = NULL;
 135         struct iscsi_tpg_np *tpg_np;
 136
 137         spin_lock(&tiqn->tiqn_tpg_lock);
 138         list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) {
 139
 140                 spin_lock(&tpg->tpg_state_lock);
 141                 if (tpg->tpg_state == TPG_STATE_FREE) {
 142                         spin_unlock(&tpg->tpg_state_lock);
 143                         continue;
 144                 }
 145                 spin_unlock(&tpg->tpg_state_lock);
 146
 147                 spin_lock(&tpg->tpg_np_lock);
 148                 list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
 149                         if (tpg_np->tpg_np == np) {
 150                                 spin_unlock(&tpg->tpg_np_lock);
 151                                 spin_unlock(&tiqn->tiqn_tpg_lock);
 152                                 return tpg;
 153                         }
 154                 }
 155                 spin_unlock(&tpg->tpg_np_lock);
 156         }
 157         spin_unlock(&tiqn->tiqn_tpg_lock);
 158
 159         return NULL;
 160 }
 161
 162 int iscsit_get_tpg(
 163         struct iscsi_portal_group *tpg)
 164 {
 165         int ret;
 166
 167         ret = mutex_lock_interruptible(&tpg->tpg_access_lock);
 168         return ((ret != 0) || signal_pending(current)) ? -1 : 0;
 169 }
 170
 171 void iscsit_put_tpg(struct iscsi_portal_group *tpg)
 172 {
 173         mutex_unlock(&tpg->tpg_access_lock);
 174 }
 175
 176 static void iscsit_clear_tpg_np_login_thread(
 177         struct iscsi_tpg_np *tpg_np,
 178         struct iscsi_portal_group *tpg)
 179 {
 180         if (!tpg_np->tpg_np) {
 181                 pr_err("struct iscsi_tpg_np->tpg_np is NULL!\n");
 182                 return;
 183         }
 184
 185         iscsit_reset_np_thread(tpg_np->tpg_np, tpg_np, tpg);
 186 }
 187
 188 void iscsit_clear_tpg_np_login_threads(
 189         struct iscsi_portal_group *tpg)
 190 {
 191         struct iscsi_tpg_np *tpg_np;
 192
 193         spin_lock(&tpg->tpg_np_lock);
 194         list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
 195                 if (!tpg_np->tpg_np) {
 196                         pr_err("struct iscsi_tpg_np->tpg_np is NULL!\n");
 197                         continue;
 198                 }
 199                 spin_unlock(&tpg->tpg_np_lock);
 200                 iscsit_clear_tpg_np_login_thread(tpg_np, tpg);
 201                 spin_lock(&tpg->tpg_np_lock);
 202         }
 203         spin_unlock(&tpg->tpg_np_lock);
 204 }
 205
 206 void iscsit_tpg_dump_params(struct iscsi_portal_group *tpg)
 207 {
 208         iscsi_print_params(tpg->param_list);
 209 }
 210
 211 static void iscsit_set_default_tpg_attribs(struct iscsi_portal_group *tpg)
 212 {
 213         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 214
 215         a->authentication = TA_AUTHENTICATION;
 216         a->login_timeout = TA_LOGIN_TIMEOUT;
 217         a->netif_timeout = TA_NETIF_TIMEOUT;
 218         a->default_cmdsn_depth = TA_DEFAULT_CMDSN_DEPTH;
 219         a->generate_node_acls = TA_GENERATE_NODE_ACLS;
 220         a->cache_dynamic_acls = TA_CACHE_DYNAMIC_ACLS;
 221         a->demo_mode_write_protect = TA_DEMO_MODE_WRITE_PROTECT;
 222         a->prod_mode_write_protect = TA_PROD_MODE_WRITE_PROTECT;
 223 }
 224
 225 int iscsit_tpg_add_portal_group(struct iscsi_tiqn *tiqn, struct iscsi_portal_group *tpg)
 226 {
 227         if (tpg->tpg_state != TPG_STATE_FREE) {
 228                 pr_err("Unable to add iSCSI Target Portal Group: %d"
 229                         " while not in TPG_STATE_FREE state.\n", tpg->tpgt);
 230                 return -EEXIST;
 231         }
 232         iscsit_set_default_tpg_attribs(tpg);
 233
 234         if (iscsi_create_default_params(&tpg->param_list) < 0)
 235                 goto err_out;
 236
 237         ISCSI_TPG_ATTRIB(tpg)->tpg = tpg;
 238
 239         spin_lock(&tpg->tpg_state_lock);
 240         tpg->tpg_state  = TPG_STATE_INACTIVE;
 241         spin_unlock(&tpg->tpg_state_lock);
 242
 243         spin_lock(&tiqn->tiqn_tpg_lock);
 244         list_add_tail(&tpg->tpg_list, &tiqn->tiqn_tpg_list);
 245         tiqn->tiqn_ntpgs++;
 246         pr_debug("CORE[%s]_TPG[%hu] - Added iSCSI Target Portal Group\n",
 247                         tiqn->tiqn, tpg->tpgt);
 248         spin_unlock(&tiqn->tiqn_tpg_lock);
 249
 250         return 0;
 251 err_out:
 252         if (tpg->param_list) {
 253                 iscsi_release_param_list(tpg->param_list);
 254                 tpg->param_list = NULL;
 255         }
 256         kfree(tpg);
 257         return -ENOMEM;
 258 }
 259
 260 int iscsit_tpg_del_portal_group(
 261         struct iscsi_tiqn *tiqn,
 262         struct iscsi_portal_group *tpg,
 263         int force)
 264 {
 265         u8 old_state = tpg->tpg_state;
 266
 267         spin_lock(&tpg->tpg_state_lock);
 268         tpg->tpg_state = TPG_STATE_INACTIVE;
 269         spin_unlock(&tpg->tpg_state_lock);
 270
 271         if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
 272                 pr_err("Unable to delete iSCSI Target Portal Group:"
 273                         " %hu while active sessions exist, and force=0\n",
 274                         tpg->tpgt);
 275                 tpg->tpg_state = old_state;
 276                 return -EPERM;
 277         }
 278
 279         core_tpg_clear_object_luns(&tpg->tpg_se_tpg);
 280
 281         if (tpg->param_list) {
 282                 iscsi_release_param_list(tpg->param_list);
 283                 tpg->param_list = NULL;
 284         }
 285
 286         core_tpg_deregister(&tpg->tpg_se_tpg);
 287
 288         spin_lock(&tpg->tpg_state_lock);
 289         tpg->tpg_state = TPG_STATE_FREE;
 290         spin_unlock(&tpg->tpg_state_lock);
 291
 292         spin_lock(&tiqn->tiqn_tpg_lock);
 293         tiqn->tiqn_ntpgs--;
 294         list_del(&tpg->tpg_list);
 295         spin_unlock(&tiqn->tiqn_tpg_lock);
 296
 297         pr_debug("CORE[%s]_TPG[%hu] - Deleted iSCSI Target Portal Group\n",
 298                         tiqn->tiqn, tpg->tpgt);
 299
 300         kfree(tpg);
 301         return 0;
 302 }
 303
 304 int iscsit_tpg_enable_portal_group(struct iscsi_portal_group *tpg)
 305 {
 306         struct iscsi_param *param;
 307         struct iscsi_tiqn *tiqn = tpg->tpg_tiqn;
 308
 309         spin_lock(&tpg->tpg_state_lock);
 310         if (tpg->tpg_state == TPG_STATE_ACTIVE) {
 311                 pr_err("iSCSI target portal group: %hu is already"
 312                         " active, ignoring request.\n", tpg->tpgt);
 313                 spin_unlock(&tpg->tpg_state_lock);
 314                 return -EINVAL;
 315         }
 316         /*
 317          * Make sure that AuthMethod does not contain None as an option
 318          * unless explictly disabled.  Set the default to CHAP if authentication
 319          * is enforced (as per default), and remove the NONE option.
 320          */
 321         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
 322         if (!param) {
 323                 spin_unlock(&tpg->tpg_state_lock);
 324                 return -ENOMEM;
 325         }
 326
 327         if (ISCSI_TPG_ATTRIB(tpg)->authentication) {
 328                 if (!strcmp(param->value, NONE))
 329                         if (iscsi_update_param_value(param, CHAP) < 0) {
 330                                 spin_unlock(&tpg->tpg_state_lock);
 331                                 return -ENOMEM;
 332                         }
 333                 if (iscsit_ta_authentication(tpg, 1) < 0) {
 334                         spin_unlock(&tpg->tpg_state_lock);
 335                         return -ENOMEM;
 336                 }
 337         }
 338
 339         tpg->tpg_state = TPG_STATE_ACTIVE;
 340         spin_unlock(&tpg->tpg_state_lock);
 341
 342         spin_lock(&tiqn->tiqn_tpg_lock);
 343         tiqn->tiqn_active_tpgs++;
 344         pr_debug("iSCSI_TPG[%hu] - Enabled iSCSI Target Portal Group\n",
 345                         tpg->tpgt);
 346         spin_unlock(&tiqn->tiqn_tpg_lock);
 347
 348         return 0;
 349 }
 350
 351 int iscsit_tpg_disable_portal_group(struct iscsi_portal_group *tpg, int force)
 352 {
 353         struct iscsi_tiqn *tiqn;
 354         u8 old_state = tpg->tpg_state;
 355
 356         spin_lock(&tpg->tpg_state_lock);
 357         if (tpg->tpg_state == TPG_STATE_INACTIVE) {
 358                 pr_err("iSCSI Target Portal Group: %hu is already"
 359                         " inactive, ignoring request.\n", tpg->tpgt);
 360                 spin_unlock(&tpg->tpg_state_lock);
 361                 return -EINVAL;
 362         }
 363         tpg->tpg_state = TPG_STATE_INACTIVE;
 364         spin_unlock(&tpg->tpg_state_lock);
 365
 366         iscsit_clear_tpg_np_login_threads(tpg);
 367
 368         if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
 369                 spin_lock(&tpg->tpg_state_lock);
 370                 tpg->tpg_state = old_state;
 371                 spin_unlock(&tpg->tpg_state_lock);
 372                 pr_err("Unable to disable iSCSI Target Portal Group:"
 373                         " %hu while active sessions exist, and force=0\n",
 374                         tpg->tpgt);
 375                 return -EPERM;
 376         }
 377
 378         tiqn = tpg->tpg_tiqn;
 379         if (!tiqn || (tpg == iscsit_global->discovery_tpg))
 380                 return 0;
 381
 382         spin_lock(&tiqn->tiqn_tpg_lock);
 383         tiqn->tiqn_active_tpgs--;
 384         pr_debug("iSCSI_TPG[%hu] - Disabled iSCSI Target Portal Group\n",
 385                         tpg->tpgt);
 386         spin_unlock(&tiqn->tiqn_tpg_lock);
 387
 388         return 0;
 389 }
 390
 391 struct iscsi_node_attrib *iscsit_tpg_get_node_attrib(
 392         struct iscsi_session *sess)
 393 {
 394         struct se_session *se_sess = sess->se_sess;
 395         struct se_node_acl *se_nacl = se_sess->se_node_acl;
 396         struct iscsi_node_acl *acl = container_of(se_nacl, struct iscsi_node_acl,
 397                                         se_node_acl);
 398
 399         return &acl->node_attrib;
 400 }
 401
 402 struct iscsi_tpg_np *iscsit_tpg_locate_child_np(
 403         struct iscsi_tpg_np *tpg_np,
 404         int network_transport)
 405 {
 406         struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
 407
 408         spin_lock(&tpg_np->tpg_np_parent_lock);
 409         list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
 410                         &tpg_np->tpg_np_parent_list, tpg_np_child_list) {
 411                 if (tpg_np_child->tpg_np->np_network_transport ==
 412                                 network_transport) {
 413                         spin_unlock(&tpg_np->tpg_np_parent_lock);
 414                         return tpg_np_child;
 415                 }
 416         }
 417         spin_unlock(&tpg_np->tpg_np_parent_lock);
 418
 419         return NULL;
 420 }
 421
 422 struct iscsi_tpg_np *iscsit_tpg_add_network_portal(
 423         struct iscsi_portal_group *tpg,
 424         struct __kernel_sockaddr_storage *sockaddr,
 425         char *ip_str,
 426         struct iscsi_tpg_np *tpg_np_parent,
 427         int network_transport)
 428 {
 429         struct iscsi_np *np;
 430         struct iscsi_tpg_np *tpg_np;
 431
 432         tpg_np = kzalloc(sizeof(struct iscsi_tpg_np), GFP_KERNEL);
 433         if (!tpg_np) {
 434                 pr_err("Unable to allocate memory for"
 435                                 " struct iscsi_tpg_np.\n");
 436                 return ERR_PTR(-ENOMEM);
 437         }
 438
 439         np = iscsit_add_np(sockaddr, ip_str, network_transport);
 440         if (IS_ERR(np)) {
 441                 kfree(tpg_np);
 442                 return ERR_CAST(np);
 443         }
 444
 445         INIT_LIST_HEAD(&tpg_np->tpg_np_list);
 446         INIT_LIST_HEAD(&tpg_np->tpg_np_child_list);
 447         INIT_LIST_HEAD(&tpg_np->tpg_np_parent_list);
 448         spin_lock_init(&tpg_np->tpg_np_parent_lock);
 449         tpg_np->tpg_np          = np;
 450         tpg_np->tpg             = tpg;
 451
 452         spin_lock(&tpg->tpg_np_lock);
 453         list_add_tail(&tpg_np->tpg_np_list, &tpg->tpg_gnp_list);
 454         tpg->num_tpg_nps++;
 455         if (tpg->tpg_tiqn)
 456                 tpg->tpg_tiqn->tiqn_num_tpg_nps++;
 457         spin_unlock(&tpg->tpg_np_lock);
 458
 459         if (tpg_np_parent) {
 460                 tpg_np->tpg_np_parent = tpg_np_parent;
 461                 spin_lock(&tpg_np_parent->tpg_np_parent_lock);
 462                 list_add_tail(&tpg_np->tpg_np_child_list,
 463                         &tpg_np_parent->tpg_np_parent_list);
 464                 spin_unlock(&tpg_np_parent->tpg_np_parent_lock);
 465         }
 466
 467         pr_debug("CORE[%s] - Added Network Portal: %s:%hu,%hu on %s\n",
 468                 tpg->tpg_tiqn->tiqn, np->np_ip, np->np_port, tpg->tpgt,
 469                 (np->np_network_transport == ISCSI_TCP) ? "TCP" : "SCTP");
 470
 471         return tpg_np;
 472 }
 473
 474 static int iscsit_tpg_release_np(
 475         struct iscsi_tpg_np *tpg_np,
 476         struct iscsi_portal_group *tpg,
 477         struct iscsi_np *np)
 478 {
 479         iscsit_clear_tpg_np_login_thread(tpg_np, tpg);
 480
 481         pr_debug("CORE[%s] - Removed Network Portal: %s:%hu,%hu on %s\n",
 482                 tpg->tpg_tiqn->tiqn, np->np_ip, np->np_port, tpg->tpgt,
 483                 (np->np_network_transport == ISCSI_TCP) ? "TCP" : "SCTP");
 484
 485         tpg_np->tpg_np = NULL;
 486         tpg_np->tpg = NULL;
 487         kfree(tpg_np);
 488         /*
 489          * iscsit_del_np() will shutdown struct iscsi_np when last TPG reference is released.
 490          */
 491         return iscsit_del_np(np);
 492 }
 493
 494 int iscsit_tpg_del_network_portal(
 495         struct iscsi_portal_group *tpg,
 496         struct iscsi_tpg_np *tpg_np)
 497 {
 498         struct iscsi_np *np;
 499         struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
 500         int ret = 0;
 501
 502         np = tpg_np->tpg_np;
 503         if (!np) {
 504                 pr_err("Unable to locate struct iscsi_np from"
 505                                 " struct iscsi_tpg_np\n");
 506                 return -EINVAL;
 507         }
 508
 509         if (!tpg_np->tpg_np_parent) {
 510                 /*
 511                  * We are the parent tpg network portal.  Release all of the
 512                  * child tpg_np's (eg: the non ISCSI_TCP ones) on our parent
 513                  * list first.
 514                  */
 515                 list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
 516                                 &tpg_np->tpg_np_parent_list,
 517                                 tpg_np_child_list) {
 518                         ret = iscsit_tpg_del_network_portal(tpg, tpg_np_child);
 519                         if (ret < 0)
 520                                 pr_err("iscsit_tpg_del_network_portal()"
 521                                         " failed: %d\n", ret);
 522                 }
 523         } else {
 524                 /*
 525                  * We are not the parent ISCSI_TCP tpg network portal.  Release
 526                  * our own network portals from the child list.
 527                  */
 528                 spin_lock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
 529                 list_del(&tpg_np->tpg_np_child_list);
 530                 spin_unlock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
 531         }
 532
 533         spin_lock(&tpg->tpg_np_lock);
 534         list_del(&tpg_np->tpg_np_list);
 535         tpg->num_tpg_nps--;
 536         if (tpg->tpg_tiqn)
 537                 tpg->tpg_tiqn->tiqn_num_tpg_nps--;
 538         spin_unlock(&tpg->tpg_np_lock);
 539
 540         return iscsit_tpg_release_np(tpg_np, tpg, np);
 541 }
 542
 543 int iscsit_tpg_set_initiator_node_queue_depth(
 544         struct iscsi_portal_group *tpg,
 545         unsigned char *initiatorname,
 546         u32 queue_depth,
 547         int force)
 548 {
 549         return core_tpg_set_initiator_node_queue_depth(&tpg->tpg_se_tpg,
 550                 initiatorname, queue_depth, force);
 551 }
 552
 553 int iscsit_ta_authentication(struct iscsi_portal_group *tpg, u32 authentication)
 554 {
 555         unsigned char buf1[256], buf2[256], *none = NULL;
 556         int len;
 557         struct iscsi_param *param;
 558         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 559
 560         if ((authentication != 1) && (authentication != 0)) {
 561                 pr_err("Illegal value for authentication parameter:"
 562                         " %u, ignoring request.\n", authentication);
 563                 return -1;
 564         }
 565
 566         memset(buf1, 0, sizeof(buf1));
 567         memset(buf2, 0, sizeof(buf2));
 568
 569         param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
 570         if (!param)
 571                 return -EINVAL;
 572
 573         if (authentication) {
 574                 snprintf(buf1, sizeof(buf1), "%s", param->value);
 575                 none = strstr(buf1, NONE);
 576                 if (!none)
 577                         goto out;
 578                 if (!strncmp(none + 4, ",", 1)) {
 579                         if (!strcmp(buf1, none))
 580                                 sprintf(buf2, "%s", none+5);
 581                         else {
 582                                 none--;
 583                                 *none = '\0';
 584                                 len = sprintf(buf2, "%s", buf1);
 585                                 none += 5;
 586                                 sprintf(buf2 + len, "%s", none);
 587                         }
 588                 } else {
 589                         none--;
 590                         *none = '\0';
 591                         sprintf(buf2, "%s", buf1);
 592                 }
 593                 if (iscsi_update_param_value(param, buf2) < 0)
 594                         return -EINVAL;
 595         } else {
 596                 snprintf(buf1, sizeof(buf1), "%s", param->value);
 597                 none = strstr(buf1, NONE);
 598                 if ((none))
 599                         goto out;
 600                 strncat(buf1, ",", strlen(","));
 601                 strncat(buf1, NONE, strlen(NONE));
 602                 if (iscsi_update_param_value(param, buf1) < 0)
 603                         return -EINVAL;
 604         }
 605
 606 out:
 607         a->authentication = authentication;
 608         pr_debug("%s iSCSI Authentication Methods for TPG: %hu.\n",
 609                 a->authentication ? "Enforcing" : "Disabling", tpg->tpgt);
 610
 611         return 0;
 612 }
 613
 614 int iscsit_ta_login_timeout(
 615         struct iscsi_portal_group *tpg,
 616         u32 login_timeout)
 617 {
 618         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 619
 620         if (login_timeout > TA_LOGIN_TIMEOUT_MAX) {
 621                 pr_err("Requested Login Timeout %u larger than maximum"
 622                         " %u\n", login_timeout, TA_LOGIN_TIMEOUT_MAX);
 623                 return -EINVAL;
 624         } else if (login_timeout < TA_LOGIN_TIMEOUT_MIN) {
 625                 pr_err("Requested Logout Timeout %u smaller than"
 626                         " minimum %u\n", login_timeout, TA_LOGIN_TIMEOUT_MIN);
 627                 return -EINVAL;
 628         }
 629
 630         a->login_timeout = login_timeout;
 631         pr_debug("Set Logout Timeout to %u for Target Portal Group"
 632                 " %hu\n", a->login_timeout, tpg->tpgt);
 633
 634         return 0;
 635 }
 636
 637 int iscsit_ta_netif_timeout(
 638         struct iscsi_portal_group *tpg,
 639         u32 netif_timeout)
 640 {
 641         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 642
 643         if (netif_timeout > TA_NETIF_TIMEOUT_MAX) {
 644                 pr_err("Requested Network Interface Timeout %u larger"
 645                         " than maximum %u\n", netif_timeout,
 646                                 TA_NETIF_TIMEOUT_MAX);
 647                 return -EINVAL;
 648         } else if (netif_timeout < TA_NETIF_TIMEOUT_MIN) {
 649                 pr_err("Requested Network Interface Timeout %u smaller"
 650                         " than minimum %u\n", netif_timeout,
 651                                 TA_NETIF_TIMEOUT_MIN);
 652                 return -EINVAL;
 653         }
 654
 655         a->netif_timeout = netif_timeout;
 656         pr_debug("Set Network Interface Timeout to %u for"
 657                 " Target Portal Group %hu\n", a->netif_timeout, tpg->tpgt);
 658
 659         return 0;
 660 }
 661
 662 int iscsit_ta_generate_node_acls(
 663         struct iscsi_portal_group *tpg,
 664         u32 flag)
 665 {
 666         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 667
 668         if ((flag != 0) && (flag != 1)) {
 669                 pr_err("Illegal value %d\n", flag);
 670                 return -EINVAL;
 671         }
 672
 673         a->generate_node_acls = flag;
 674         pr_debug("iSCSI_TPG[%hu] - Generate Initiator Portal Group ACLs: %s\n",
 675                 tpg->tpgt, (a->generate_node_acls) ? "Enabled" : "Disabled");
 676
 677         return 0;
 678 }
 679
 680 int iscsit_ta_default_cmdsn_depth(
 681         struct iscsi_portal_group *tpg,
 682         u32 tcq_depth)
 683 {
 684         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 685
 686         if (tcq_depth > TA_DEFAULT_CMDSN_DEPTH_MAX) {
 687                 pr_err("Requested Default Queue Depth: %u larger"
 688                         " than maximum %u\n", tcq_depth,
 689                                 TA_DEFAULT_CMDSN_DEPTH_MAX);
 690                 return -EINVAL;
 691         } else if (tcq_depth < TA_DEFAULT_CMDSN_DEPTH_MIN) {
 692                 pr_err("Requested Default Queue Depth: %u smaller"
 693                         " than minimum %u\n", tcq_depth,
 694                                 TA_DEFAULT_CMDSN_DEPTH_MIN);
 695                 return -EINVAL;
 696         }
 697
 698         a->default_cmdsn_depth = tcq_depth;
 699         pr_debug("iSCSI_TPG[%hu] - Set Default CmdSN TCQ Depth to %u\n",
 700                 tpg->tpgt, a->default_cmdsn_depth);
 701
 702         return 0;
 703 }
 704
 705 int iscsit_ta_cache_dynamic_acls(
 706         struct iscsi_portal_group *tpg,
 707         u32 flag)
 708 {
 709         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 710
 711         if ((flag != 0) && (flag != 1)) {
 712                 pr_err("Illegal value %d\n", flag);
 713                 return -EINVAL;
 714         }
 715
 716         a->cache_dynamic_acls = flag;
 717         pr_debug("iSCSI_TPG[%hu] - Cache Dynamic Initiator Portal Group"
 718                 " ACLs %s\n", tpg->tpgt, (a->cache_dynamic_acls) ?
 719                 "Enabled" : "Disabled");
 720
 721         return 0;
 722 }
 723
 724 int iscsit_ta_demo_mode_write_protect(
 725         struct iscsi_portal_group *tpg,
 726         u32 flag)
 727 {
 728         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 729
 730         if ((flag != 0) && (flag != 1)) {
 731                 pr_err("Illegal value %d\n", flag);
 732                 return -EINVAL;
 733         }
 734
 735         a->demo_mode_write_protect = flag;
 736         pr_debug("iSCSI_TPG[%hu] - Demo Mode Write Protect bit: %s\n",
 737                 tpg->tpgt, (a->demo_mode_write_protect) ? "ON" : "OFF");
 738
 739         return 0;
 740 }
 741
 742 int iscsit_ta_prod_mode_write_protect(
 743         struct iscsi_portal_group *tpg,
 744         u32 flag)
 745 {
 746         struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
 747
 748         if ((flag != 0) && (flag != 1)) {
 749                 pr_err("Illegal value %d\n", flag);
 750                 return -EINVAL;
 751         }
 752
 753         a->prod_mode_write_protect = flag;
 754         pr_debug("iSCSI_TPG[%hu] - Production Mode Write Protect bit:"
 755                 " %s\n", tpg->tpgt, (a->prod_mode_write_protect) ?
 756                 "ON" : "OFF");
 757
 758         return 0;
 759 }