drivers/target/target_core_tpg.c

   1 /*******************************************************************************
   2  * Filename:  target_core_tpg.c
   3  *
   4  * This file contains generic Target Portal Group related functions.
   5  *
   6  * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc.
   7  * Copyright (c) 2005, 2006, 2007 SBE, Inc.
   8  * Copyright (c) 2007-2010 Rising Tide Systems
   9  * Copyright (c) 2008-2010 Linux-iSCSI.org
  10  *
  11  * Nicholas A. Bellinger <nab@kernel.org>
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  26  *
  27  ******************************************************************************/
  28
  29 #include <linux/net.h>
  30 #include <linux/string.h>
  31 #include <linux/timer.h>
  32 #include <linux/slab.h>
  33 #include <linux/spinlock.h>
  34 #include <linux/smp_lock.h>
  35 #include <linux/in.h>
  36 #include <net/sock.h>
  37 #include <net/tcp.h>
  38 #include <scsi/scsi.h>
  39 #include <scsi/scsi_cmnd.h>
  40
  41 #include <target/target_core_base.h>
  42 #include <target/target_core_device.h>
  43 #include <target/target_core_tpg.h>
  44 #include <target/target_core_transport.h>
  45 #include <target/target_core_fabric_ops.h>
  46
  47 #include "target_core_hba.h"
  48
  49 /*      core_clear_initiator_node_from_tpg():
  50  *
  51  *
  52  */
  53 static void core_clear_initiator_node_from_tpg(
  54         struct se_node_acl *nacl,
  55         struct se_portal_group *tpg)
  56 {
  57         int i;
  58         struct se_dev_entry *deve;
  59         struct se_lun *lun;
  60         struct se_lun_acl *acl, *acl_tmp;
  61
  62         spin_lock_irq(&nacl->device_list_lock);
  63         for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
  64                 deve = &nacl->device_list[i];
  65
  66                 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
  67                         continue;
  68
  69                 if (!deve->se_lun) {
  70                         printk(KERN_ERR "%s device entries device pointer is"
  71                                 " NULL, but Initiator has access.\n",
  72                                 TPG_TFO(tpg)->get_fabric_name());
  73                         continue;
  74                 }
  75
  76                 lun = deve->se_lun;
  77                 spin_unlock_irq(&nacl->device_list_lock);
  78                 core_update_device_list_for_node(lun, NULL, deve->mapped_lun,
  79                         TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
  80
  81                 spin_lock(&lun->lun_acl_lock);
  82                 list_for_each_entry_safe(acl, acl_tmp,
  83                                         &lun->lun_acl_list, lacl_list) {
  84                         if (!(strcmp(acl->initiatorname,
  85                                         nacl->initiatorname)) &&
  86                              (acl->mapped_lun == deve->mapped_lun))
  87                                 break;
  88                 }
  89
  90                 if (!acl) {
  91                         printk(KERN_ERR "Unable to locate struct se_lun_acl for %s,"
  92                                 " mapped_lun: %u\n", nacl->initiatorname,
  93                                 deve->mapped_lun);
  94                         spin_unlock(&lun->lun_acl_lock);
  95                         spin_lock_irq(&nacl->device_list_lock);
  96                         continue;
  97                 }
  98
  99                 list_del(&acl->lacl_list);
 100                 spin_unlock(&lun->lun_acl_lock);
 101
 102                 spin_lock_irq(&nacl->device_list_lock);
 103                 kfree(acl);
 104         }
 105         spin_unlock_irq(&nacl->device_list_lock);
 106 }
 107
 108 /*      __core_tpg_get_initiator_node_acl():
 109  *
 110  *      spin_lock_bh(&tpg->acl_node_lock); must be held when calling
 111  */
 112 struct se_node_acl *__core_tpg_get_initiator_node_acl(
 113         struct se_portal_group *tpg,
 114         const char *initiatorname)
 115 {
 116         struct se_node_acl *acl;
 117
 118         list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
 119                 if (!(strcmp(acl->initiatorname, initiatorname)))
 120                         return acl;
 121         }
 122
 123         return NULL;
 124 }
 125
 126 /*      core_tpg_get_initiator_node_acl():
 127  *
 128  *
 129  */
 130 struct se_node_acl *core_tpg_get_initiator_node_acl(
 131         struct se_portal_group *tpg,
 132         unsigned char *initiatorname)
 133 {
 134         struct se_node_acl *acl;
 135
 136         spin_lock_bh(&tpg->acl_node_lock);
 137         list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
 138                 if (!(strcmp(acl->initiatorname, initiatorname)) &&
 139                    (!(acl->dynamic_node_acl))) {
 140                         spin_unlock_bh(&tpg->acl_node_lock);
 141                         return acl;
 142                 }
 143         }
 144         spin_unlock_bh(&tpg->acl_node_lock);
 145
 146         return NULL;
 147 }
 148
 149 /*      core_tpg_add_node_to_devs():
 150  *
 151  *
 152  */
 153 void core_tpg_add_node_to_devs(
 154         struct se_node_acl *acl,
 155         struct se_portal_group *tpg)
 156 {
 157         int i = 0;
 158         u32 lun_access = 0;
 159         struct se_lun *lun;
 160         struct se_device *dev;
 161
 162         spin_lock(&tpg->tpg_lun_lock);
 163         for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
 164                 lun = &tpg->tpg_lun_list[i];
 165                 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE)
 166                         continue;
 167
 168                 spin_unlock(&tpg->tpg_lun_lock);
 169
 170                 dev = lun->lun_se_dev;
 171                 /*
 172                  * By default in LIO-Target $FABRIC_MOD,
 173                  * demo_mode_write_protect is ON, or READ_ONLY;
 174                  */
 175                 if (!(TPG_TFO(tpg)->tpg_check_demo_mode_write_protect(tpg))) {
 176                         if (dev->dev_flags & DF_READ_ONLY)
 177                                 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
 178                         else
 179                                 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
 180                 } else {
 181                         /*
 182                          * Allow only optical drives to issue R/W in default RO
 183                          * demo mode.
 184                          */
 185                         if (TRANSPORT(dev)->get_device_type(dev) == TYPE_DISK)
 186                                 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
 187                         else
 188                                 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
 189                 }
 190
 191                 printk(KERN_INFO "TARGET_CORE[%s]->TPG[%u]_LUN[%u] - Adding %s"
 192                         " access for LUN in Demo Mode\n",
 193                         TPG_TFO(tpg)->get_fabric_name(),
 194                         TPG_TFO(tpg)->tpg_get_tag(tpg), lun->unpacked_lun,
 195                         (lun_access == TRANSPORT_LUNFLAGS_READ_WRITE) ?
 196                         "READ-WRITE" : "READ-ONLY");
 197
 198                 core_update_device_list_for_node(lun, NULL, lun->unpacked_lun,
 199                                 lun_access, acl, tpg, 1);
 200                 spin_lock(&tpg->tpg_lun_lock);
 201         }
 202         spin_unlock(&tpg->tpg_lun_lock);
 203 }
 204
 205 /*      core_set_queue_depth_for_node():
 206  *
 207  *
 208  */
 209 static int core_set_queue_depth_for_node(
 210         struct se_portal_group *tpg,
 211         struct se_node_acl *acl)
 212 {
 213         if (!acl->queue_depth) {
 214                 printk(KERN_ERR "Queue depth for %s Initiator Node: %s is 0,"
 215                         "defaulting to 1.\n", TPG_TFO(tpg)->get_fabric_name(),
 216                         acl->initiatorname);
 217                 acl->queue_depth = 1;
 218         }
 219
 220         return 0;
 221 }
 222
 223 /*      core_create_device_list_for_node():
 224  *
 225  *
 226  */
 227 static int core_create_device_list_for_node(struct se_node_acl *nacl)
 228 {
 229         struct se_dev_entry *deve;
 230         int i;
 231
 232         nacl->device_list = kzalloc(sizeof(struct se_dev_entry) *
 233                                 TRANSPORT_MAX_LUNS_PER_TPG, GFP_KERNEL);
 234         if (!(nacl->device_list)) {
 235                 printk(KERN_ERR "Unable to allocate memory for"
 236                         " struct se_node_acl->device_list\n");
 237                 return -1;
 238         }
 239         for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
 240                 deve = &nacl->device_list[i];
 241
 242                 atomic_set(&deve->ua_count, 0);
 243                 atomic_set(&deve->pr_ref_count, 0);
 244                 spin_lock_init(&deve->ua_lock);
 245                 INIT_LIST_HEAD(&deve->alua_port_list);
 246                 INIT_LIST_HEAD(&deve->ua_list);
 247         }
 248
 249         return 0;
 250 }
 251
 252 /*      core_tpg_check_initiator_node_acl()
 253  *
 254  *
 255  */
 256 struct se_node_acl *core_tpg_check_initiator_node_acl(
 257         struct se_portal_group *tpg,
 258         unsigned char *initiatorname)
 259 {
 260         struct se_node_acl *acl;
 261
 262         acl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
 263         if ((acl))
 264                 return acl;
 265
 266         if (!(TPG_TFO(tpg)->tpg_check_demo_mode(tpg)))
 267                 return NULL;
 268
 269         acl =  TPG_TFO(tpg)->tpg_alloc_fabric_acl(tpg);
 270         if (!(acl))
 271                 return NULL;
 272
 273         INIT_LIST_HEAD(&acl->acl_list);
 274         INIT_LIST_HEAD(&acl->acl_sess_list);
 275         spin_lock_init(&acl->device_list_lock);
 276         spin_lock_init(&acl->nacl_sess_lock);
 277         atomic_set(&acl->acl_pr_ref_count, 0);
 278         atomic_set(&acl->mib_ref_count, 0);
 279         acl->queue_depth = TPG_TFO(tpg)->tpg_get_default_depth(tpg);
 280         snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
 281         acl->se_tpg = tpg;
 282         acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX);
 283         spin_lock_init(&acl->stats_lock);
 284         acl->dynamic_node_acl = 1;
 285
 286         TPG_TFO(tpg)->set_default_node_attributes(acl);
 287
 288         if (core_create_device_list_for_node(acl) < 0) {
 289                 TPG_TFO(tpg)->tpg_release_fabric_acl(tpg, acl);
 290                 return NULL;
 291         }
 292
 293         if (core_set_queue_depth_for_node(tpg, acl) < 0) {
 294                 core_free_device_list_for_node(acl, tpg);
 295                 TPG_TFO(tpg)->tpg_release_fabric_acl(tpg, acl);
 296                 return NULL;
 297         }
 298
 299         core_tpg_add_node_to_devs(acl, tpg);
 300
 301         spin_lock_bh(&tpg->acl_node_lock);
 302         list_add_tail(&acl->acl_list, &tpg->acl_node_list);
 303         tpg->num_node_acls++;
 304         spin_unlock_bh(&tpg->acl_node_lock);
 305
 306         printk("%s_TPG[%u] - Added DYNAMIC ACL with TCQ Depth: %d for %s"
 307                 " Initiator Node: %s\n", TPG_TFO(tpg)->get_fabric_name(),
 308                 TPG_TFO(tpg)->tpg_get_tag(tpg), acl->queue_depth,
 309                 TPG_TFO(tpg)->get_fabric_name(), initiatorname);
 310
 311         return acl;
 312 }
 313 EXPORT_SYMBOL(core_tpg_check_initiator_node_acl);
 314
 315 void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl *nacl)
 316 {
 317         while (atomic_read(&nacl->acl_pr_ref_count) != 0)
 318                 cpu_relax();
 319 }
 320
 321 void core_tpg_wait_for_mib_ref(struct se_node_acl *nacl)
 322 {
 323         while (atomic_read(&nacl->mib_ref_count) != 0)
 324                 cpu_relax();
 325 }
 326
 327 void core_tpg_clear_object_luns(struct se_portal_group *tpg)
 328 {
 329         int i, ret;
 330         struct se_lun *lun;
 331
 332         spin_lock(&tpg->tpg_lun_lock);
 333         for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
 334                 lun = &tpg->tpg_lun_list[i];
 335
 336                 if ((lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) ||
 337                     (lun->lun_se_dev == NULL))
 338                         continue;
 339
 340                 spin_unlock(&tpg->tpg_lun_lock);
 341                 ret = core_dev_del_lun(tpg, lun->unpacked_lun);
 342                 spin_lock(&tpg->tpg_lun_lock);
 343         }
 344         spin_unlock(&tpg->tpg_lun_lock);
 345 }
 346 EXPORT_SYMBOL(core_tpg_clear_object_luns);
 347
 348 /*      core_tpg_add_initiator_node_acl():
 349  *
 350  *
 351  */
 352 struct se_node_acl *core_tpg_add_initiator_node_acl(
 353         struct se_portal_group *tpg,
 354         struct se_node_acl *se_nacl,
 355         const char *initiatorname,
 356         u32 queue_depth)
 357 {
 358         struct se_node_acl *acl = NULL;
 359
 360         spin_lock_bh(&tpg->acl_node_lock);
 361         acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname);
 362         if ((acl)) {
 363                 if (acl->dynamic_node_acl) {
 364                         acl->dynamic_node_acl = 0;
 365                         printk(KERN_INFO "%s_TPG[%u] - Replacing dynamic ACL"
 366                                 " for %s\n", TPG_TFO(tpg)->get_fabric_name(),
 367                                 TPG_TFO(tpg)->tpg_get_tag(tpg), initiatorname);
 368                         spin_unlock_bh(&tpg->acl_node_lock);
 369                         /*
 370                          * Release the locally allocated struct se_node_acl
 371                          * because * core_tpg_add_initiator_node_acl() returned
 372                          * a pointer to an existing demo mode node ACL.
 373                          */
 374                         if (se_nacl)
 375                                 TPG_TFO(tpg)->tpg_release_fabric_acl(tpg,
 376                                                         se_nacl);
 377                         goto done;
 378                 }
 379
 380                 printk(KERN_ERR "ACL entry for %s Initiator"
 381                         " Node %s already exists for TPG %u, ignoring"
 382                         " request.\n",  TPG_TFO(tpg)->get_fabric_name(),
 383                         initiatorname, TPG_TFO(tpg)->tpg_get_tag(tpg));
 384                 spin_unlock_bh(&tpg->acl_node_lock);
 385                 return ERR_PTR(-EEXIST);
 386         }
 387         spin_unlock_bh(&tpg->acl_node_lock);
 388
 389         if (!(se_nacl)) {
 390                 printk("struct se_node_acl pointer is NULL\n");
 391                 return ERR_PTR(-EINVAL);
 392         }
 393         /*
 394          * For v4.x logic the se_node_acl_s is hanging off a fabric
 395          * dependent structure allocated via
 396          * struct target_core_fabric_ops->fabric_make_nodeacl()
 397          */
 398         acl = se_nacl;
 399
 400         INIT_LIST_HEAD(&acl->acl_list);
 401         INIT_LIST_HEAD(&acl->acl_sess_list);
 402         spin_lock_init(&acl->device_list_lock);
 403         spin_lock_init(&acl->nacl_sess_lock);
 404         atomic_set(&acl->acl_pr_ref_count, 0);
 405         acl->queue_depth = queue_depth;
 406         snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
 407         acl->se_tpg = tpg;
 408         acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX);
 409         spin_lock_init(&acl->stats_lock);
 410
 411         TPG_TFO(tpg)->set_default_node_attributes(acl);
 412
 413         if (core_create_device_list_for_node(acl) < 0) {
 414                 TPG_TFO(tpg)->tpg_release_fabric_acl(tpg, acl);
 415                 return ERR_PTR(-ENOMEM);
 416         }
 417
 418         if (core_set_queue_depth_for_node(tpg, acl) < 0) {
 419                 core_free_device_list_for_node(acl, tpg);
 420                 TPG_TFO(tpg)->tpg_release_fabric_acl(tpg, acl);
 421                 return ERR_PTR(-EINVAL);
 422         }
 423
 424         spin_lock_bh(&tpg->acl_node_lock);
 425         list_add_tail(&acl->acl_list, &tpg->acl_node_list);
 426         tpg->num_node_acls++;
 427         spin_unlock_bh(&tpg->acl_node_lock);
 428
 429 done:
 430         printk(KERN_INFO "%s_TPG[%hu] - Added ACL with TCQ Depth: %d for %s"
 431                 " Initiator Node: %s\n", TPG_TFO(tpg)->get_fabric_name(),
 432                 TPG_TFO(tpg)->tpg_get_tag(tpg), acl->queue_depth,
 433                 TPG_TFO(tpg)->get_fabric_name(), initiatorname);
 434
 435         return acl;
 436 }
 437 EXPORT_SYMBOL(core_tpg_add_initiator_node_acl);
 438
 439 /*      core_tpg_del_initiator_node_acl():
 440  *
 441  *
 442  */
 443 int core_tpg_del_initiator_node_acl(
 444         struct se_portal_group *tpg,
 445         struct se_node_acl *acl,
 446         int force)
 447 {
 448         struct se_session *sess, *sess_tmp;
 449         int dynamic_acl = 0;
 450
 451         spin_lock_bh(&tpg->acl_node_lock);
 452         if (acl->dynamic_node_acl) {
 453                 acl->dynamic_node_acl = 0;
 454                 dynamic_acl = 1;
 455         }
 456         list_del(&acl->acl_list);
 457         tpg->num_node_acls--;
 458         spin_unlock_bh(&tpg->acl_node_lock);
 459
 460         spin_lock_bh(&tpg->session_lock);
 461         list_for_each_entry_safe(sess, sess_tmp,
 462                                 &tpg->tpg_sess_list, sess_list) {
 463                 if (sess->se_node_acl != acl)
 464                         continue;
 465                 /*
 466                  * Determine if the session needs to be closed by our context.
 467                  */
 468                 if (!(TPG_TFO(tpg)->shutdown_session(sess)))
 469                         continue;
 470
 471                 spin_unlock_bh(&tpg->session_lock);
 472                 /*
 473                  * If the $FABRIC_MOD session for the Initiator Node ACL exists,
 474                  * forcefully shutdown the $FABRIC_MOD session/nexus.
 475                  */
 476                 TPG_TFO(tpg)->close_session(sess);
 477
 478                 spin_lock_bh(&tpg->session_lock);
 479         }
 480         spin_unlock_bh(&tpg->session_lock);
 481
 482         core_tpg_wait_for_nacl_pr_ref(acl);
 483         core_tpg_wait_for_mib_ref(acl);
 484         core_clear_initiator_node_from_tpg(acl, tpg);
 485         core_free_device_list_for_node(acl, tpg);
 486
 487         printk(KERN_INFO "%s_TPG[%hu] - Deleted ACL with TCQ Depth: %d for %s"
 488                 " Initiator Node: %s\n", TPG_TFO(tpg)->get_fabric_name(),
 489                 TPG_TFO(tpg)->tpg_get_tag(tpg), acl->queue_depth,
 490                 TPG_TFO(tpg)->get_fabric_name(), acl->initiatorname);
 491
 492         return 0;
 493 }
 494 EXPORT_SYMBOL(core_tpg_del_initiator_node_acl);
 495
 496 /*      core_tpg_set_initiator_node_queue_depth():
 497  *
 498  *
 499  */
 500 int core_tpg_set_initiator_node_queue_depth(
 501         struct se_portal_group *tpg,
 502         unsigned char *initiatorname,
 503         u32 queue_depth,
 504         int force)
 505 {
 506         struct se_session *sess, *init_sess = NULL;
 507         struct se_node_acl *acl;
 508         int dynamic_acl = 0;
 509
 510         spin_lock_bh(&tpg->acl_node_lock);
 511         acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname);
 512         if (!(acl)) {
 513                 printk(KERN_ERR "Access Control List entry for %s Initiator"
 514                         " Node %s does not exists for TPG %hu, ignoring"
 515                         " request.\n", TPG_TFO(tpg)->get_fabric_name(),
 516                         initiatorname, TPG_TFO(tpg)->tpg_get_tag(tpg));
 517                 spin_unlock_bh(&tpg->acl_node_lock);
 518                 return -ENODEV;
 519         }
 520         if (acl->dynamic_node_acl) {
 521                 acl->dynamic_node_acl = 0;
 522                 dynamic_acl = 1;
 523         }
 524         spin_unlock_bh(&tpg->acl_node_lock);
 525
 526         spin_lock_bh(&tpg->session_lock);
 527         list_for_each_entry(sess, &tpg->tpg_sess_list, sess_list) {
 528                 if (sess->se_node_acl != acl)
 529                         continue;
 530
 531                 if (!force) {
 532                         printk(KERN_ERR "Unable to change queue depth for %s"
 533                                 " Initiator Node: %s while session is"
 534                                 " operational.  To forcefully change the queue"
 535                                 " depth and force session reinstatement"
 536                                 " use the \"force=1\" parameter.\n",
 537                                 TPG_TFO(tpg)->get_fabric_name(), initiatorname);
 538                         spin_unlock_bh(&tpg->session_lock);
 539
 540                         spin_lock_bh(&tpg->acl_node_lock);
 541                         if (dynamic_acl)
 542                                 acl->dynamic_node_acl = 1;
 543                         spin_unlock_bh(&tpg->acl_node_lock);
 544                         return -EEXIST;
 545                 }
 546                 /*
 547                  * Determine if the session needs to be closed by our context.
 548                  */
 549                 if (!(TPG_TFO(tpg)->shutdown_session(sess)))
 550                         continue;
 551
 552                 init_sess = sess;
 553                 break;
 554         }
 555
 556         /*
 557          * User has requested to change the queue depth for a Initiator Node.
 558          * Change the value in the Node's struct se_node_acl, and call
 559          * core_set_queue_depth_for_node() to add the requested queue depth.
 560          *
 561          * Finally call  TPG_TFO(tpg)->close_session() to force session
 562          * reinstatement to occur if there is an active session for the
 563          * $FABRIC_MOD Initiator Node in question.
 564          */
 565         acl->queue_depth = queue_depth;
 566
 567         if (core_set_queue_depth_for_node(tpg, acl) < 0) {
 568                 spin_unlock_bh(&tpg->session_lock);
 569                 /*
 570                  * Force session reinstatement if
 571                  * core_set_queue_depth_for_node() failed, because we assume
 572                  * the $FABRIC_MOD has already the set session reinstatement
 573                  * bit from TPG_TFO(tpg)->shutdown_session() called above.
 574                  */
 575                 if (init_sess)
 576                         TPG_TFO(tpg)->close_session(init_sess);
 577
 578                 spin_lock_bh(&tpg->acl_node_lock);
 579                 if (dynamic_acl)
 580                         acl->dynamic_node_acl = 1;
 581                 spin_unlock_bh(&tpg->acl_node_lock);
 582                 return -EINVAL;
 583         }
 584         spin_unlock_bh(&tpg->session_lock);
 585         /*
 586          * If the $FABRIC_MOD session for the Initiator Node ACL exists,
 587          * forcefully shutdown the $FABRIC_MOD session/nexus.
 588          */
 589         if (init_sess)
 590                 TPG_TFO(tpg)->close_session(init_sess);
 591
 592         printk(KERN_INFO "Successfuly changed queue depth to: %d for Initiator"
 593                 " Node: %s on %s Target Portal Group: %u\n", queue_depth,
 594                 initiatorname, TPG_TFO(tpg)->get_fabric_name(),
 595                 TPG_TFO(tpg)->tpg_get_tag(tpg));
 596
 597         spin_lock_bh(&tpg->acl_node_lock);
 598         if (dynamic_acl)
 599                 acl->dynamic_node_acl = 1;
 600         spin_unlock_bh(&tpg->acl_node_lock);
 601
 602         return 0;
 603 }
 604 EXPORT_SYMBOL(core_tpg_set_initiator_node_queue_depth);
 605
 606 static int core_tpg_setup_virtual_lun0(struct se_portal_group *se_tpg)
 607 {
 608         /* Set in core_dev_setup_virtual_lun0() */
 609         struct se_device *dev = se_global->g_lun0_dev;
 610         struct se_lun *lun = &se_tpg->tpg_virt_lun0;
 611         u32 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
 612         int ret;
 613
 614         lun->unpacked_lun = 0;
 615         lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
 616         atomic_set(&lun->lun_acl_count, 0);
 617         init_completion(&lun->lun_shutdown_comp);
 618         INIT_LIST_HEAD(&lun->lun_acl_list);
 619         INIT_LIST_HEAD(&lun->lun_cmd_list);
 620         spin_lock_init(&lun->lun_acl_lock);
 621         spin_lock_init(&lun->lun_cmd_lock);
 622         spin_lock_init(&lun->lun_sep_lock);
 623
 624         ret = core_tpg_post_addlun(se_tpg, lun, lun_access, dev);
 625         if (ret < 0)
 626                 return -1;
 627
 628         return 0;
 629 }
 630
 631 static void core_tpg_release_virtual_lun0(struct se_portal_group *se_tpg)
 632 {
 633         struct se_lun *lun = &se_tpg->tpg_virt_lun0;
 634
 635         core_tpg_post_dellun(se_tpg, lun);
 636 }
 637
 638 int core_tpg_register(
 639         struct target_core_fabric_ops *tfo,
 640         struct se_wwn *se_wwn,
 641         struct se_portal_group *se_tpg,
 642         void *tpg_fabric_ptr,
 643         int se_tpg_type)
 644 {
 645         struct se_lun *lun;
 646         u32 i;
 647
 648         se_tpg->tpg_lun_list = kzalloc((sizeof(struct se_lun) *
 649                                 TRANSPORT_MAX_LUNS_PER_TPG), GFP_KERNEL);
 650         if (!(se_tpg->tpg_lun_list)) {
 651                 printk(KERN_ERR "Unable to allocate struct se_portal_group->"
 652                                 "tpg_lun_list\n");
 653                 return -ENOMEM;
 654         }
 655
 656         for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
 657                 lun = &se_tpg->tpg_lun_list[i];
 658                 lun->unpacked_lun = i;
 659                 lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
 660                 atomic_set(&lun->lun_acl_count, 0);
 661                 init_completion(&lun->lun_shutdown_comp);
 662                 INIT_LIST_HEAD(&lun->lun_acl_list);
 663                 INIT_LIST_HEAD(&lun->lun_cmd_list);
 664                 spin_lock_init(&lun->lun_acl_lock);
 665                 spin_lock_init(&lun->lun_cmd_lock);
 666                 spin_lock_init(&lun->lun_sep_lock);
 667         }
 668
 669         se_tpg->se_tpg_type = se_tpg_type;
 670         se_tpg->se_tpg_fabric_ptr = tpg_fabric_ptr;
 671         se_tpg->se_tpg_tfo = tfo;
 672         se_tpg->se_tpg_wwn = se_wwn;
 673         atomic_set(&se_tpg->tpg_pr_ref_count, 0);
 674         INIT_LIST_HEAD(&se_tpg->acl_node_list);
 675         INIT_LIST_HEAD(&se_tpg->se_tpg_list);
 676         INIT_LIST_HEAD(&se_tpg->tpg_sess_list);
 677         spin_lock_init(&se_tpg->acl_node_lock);
 678         spin_lock_init(&se_tpg->session_lock);
 679         spin_lock_init(&se_tpg->tpg_lun_lock);
 680
 681         if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) {
 682                 if (core_tpg_setup_virtual_lun0(se_tpg) < 0) {
 683                         kfree(se_tpg);
 684                         return -ENOMEM;
 685                 }
 686         }
 687
 688         spin_lock_bh(&se_global->se_tpg_lock);
 689         list_add_tail(&se_tpg->se_tpg_list, &se_global->g_se_tpg_list);
 690         spin_unlock_bh(&se_global->se_tpg_lock);
 691
 692         printk(KERN_INFO "TARGET_CORE[%s]: Allocated %s struct se_portal_group for"
 693                 " endpoint: %s, Portal Tag: %u\n", tfo->get_fabric_name(),
 694                 (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ?
 695                 "Normal" : "Discovery", (tfo->tpg_get_wwn(se_tpg) == NULL) ?
 696                 "None" : tfo->tpg_get_wwn(se_tpg), tfo->tpg_get_tag(se_tpg));
 697
 698         return 0;
 699 }
 700 EXPORT_SYMBOL(core_tpg_register);
 701
 702 int core_tpg_deregister(struct se_portal_group *se_tpg)
 703 {
 704         printk(KERN_INFO "TARGET_CORE[%s]: Deallocating %s struct se_portal_group"
 705                 " for endpoint: %s Portal Tag %u\n",
 706                 (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ?
 707                 "Normal" : "Discovery", TPG_TFO(se_tpg)->get_fabric_name(),
 708                 TPG_TFO(se_tpg)->tpg_get_wwn(se_tpg),
 709                 TPG_TFO(se_tpg)->tpg_get_tag(se_tpg));
 710
 711         spin_lock_bh(&se_global->se_tpg_lock);
 712         list_del(&se_tpg->se_tpg_list);
 713         spin_unlock_bh(&se_global->se_tpg_lock);
 714
 715         while (atomic_read(&se_tpg->tpg_pr_ref_count) != 0)
 716                 cpu_relax();
 717
 718         if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL)
 719                 core_tpg_release_virtual_lun0(se_tpg);
 720
 721         se_tpg->se_tpg_fabric_ptr = NULL;
 722         kfree(se_tpg->tpg_lun_list);
 723         return 0;
 724 }
 725 EXPORT_SYMBOL(core_tpg_deregister);
 726
 727 struct se_lun *core_tpg_pre_addlun(
 728         struct se_portal_group *tpg,
 729         u32 unpacked_lun)
 730 {
 731         struct se_lun *lun;
 732
 733         if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
 734                 printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG"
 735                         "-1: %u for Target Portal Group: %u\n",
 736                         TPG_TFO(tpg)->get_fabric_name(),
 737                         unpacked_lun, TRANSPORT_MAX_LUNS_PER_TPG-1,
 738                         TPG_TFO(tpg)->tpg_get_tag(tpg));
 739                 return ERR_PTR(-EOVERFLOW);
 740         }
 741
 742         spin_lock(&tpg->tpg_lun_lock);
 743         lun = &tpg->tpg_lun_list[unpacked_lun];
 744         if (lun->lun_status == TRANSPORT_LUN_STATUS_ACTIVE) {
 745                 printk(KERN_ERR "TPG Logical Unit Number: %u is already active"
 746                         " on %s Target Portal Group: %u, ignoring request.\n",
 747                         unpacked_lun, TPG_TFO(tpg)->get_fabric_name(),
 748                         TPG_TFO(tpg)->tpg_get_tag(tpg));
 749                 spin_unlock(&tpg->tpg_lun_lock);
 750                 return ERR_PTR(-EINVAL);
 751         }
 752         spin_unlock(&tpg->tpg_lun_lock);
 753
 754         return lun;
 755 }
 756
 757 int core_tpg_post_addlun(
 758         struct se_portal_group *tpg,
 759         struct se_lun *lun,
 760         u32 lun_access,
 761         void *lun_ptr)
 762 {
 763         if (core_dev_export(lun_ptr, tpg, lun) < 0)
 764                 return -1;
 765
 766         spin_lock(&tpg->tpg_lun_lock);
 767         lun->lun_access = lun_access;
 768         lun->lun_status = TRANSPORT_LUN_STATUS_ACTIVE;
 769         spin_unlock(&tpg->tpg_lun_lock);
 770
 771         return 0;
 772 }
 773
 774 static void core_tpg_shutdown_lun(
 775         struct se_portal_group *tpg,
 776         struct se_lun *lun)
 777 {
 778         core_clear_lun_from_tpg(lun, tpg);
 779         transport_clear_lun_from_sessions(lun);
 780 }
 781
 782 struct se_lun *core_tpg_pre_dellun(
 783         struct se_portal_group *tpg,
 784         u32 unpacked_lun,
 785         int *ret)
 786 {
 787         struct se_lun *lun;
 788
 789         if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
 790                 printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG"
 791                         "-1: %u for Target Portal Group: %u\n",
 792                         TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
 793                         TRANSPORT_MAX_LUNS_PER_TPG-1,
 794                         TPG_TFO(tpg)->tpg_get_tag(tpg));
 795                 return ERR_PTR(-EOVERFLOW);
 796         }
 797
 798         spin_lock(&tpg->tpg_lun_lock);
 799         lun = &tpg->tpg_lun_list[unpacked_lun];
 800         if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
 801                 printk(KERN_ERR "%s Logical Unit Number: %u is not active on"
 802                         " Target Portal Group: %u, ignoring request.\n",
 803                         TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
 804                         TPG_TFO(tpg)->tpg_get_tag(tpg));
 805                 spin_unlock(&tpg->tpg_lun_lock);
 806                 return ERR_PTR(-ENODEV);
 807         }
 808         spin_unlock(&tpg->tpg_lun_lock);
 809
 810         return lun;
 811 }
 812
 813 int core_tpg_post_dellun(
 814         struct se_portal_group *tpg,
 815         struct se_lun *lun)
 816 {
 817         core_tpg_shutdown_lun(tpg, lun);
 818
 819         core_dev_unexport(lun->lun_se_dev, tpg, lun);
 820
 821         spin_lock(&tpg->tpg_lun_lock);
 822         lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
 823         spin_unlock(&tpg->tpg_lun_lock);
 824
 825         return 0;
 826 }