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/in.h>
  35 #include <net/sock.h>
  36 #include <net/tcp.h>
  37 #include <scsi/scsi.h>
  38 #include <scsi/scsi_cmnd.h>
  39
  40 #include <target/target_core_base.h>
  41 #include <target/target_core_device.h>
  42 #include <target/target_core_tpg.h>
  43 #include <target/target_core_transport.h>
  44 #include <target/target_core_fabric_ops.h>
  45
  46 #include "target_core_hba.h"
  47 #include "target_core_stat.h"
  48
  49 extern struct se_device *g_lun0_dev;
  50
  51 static DEFINE_SPINLOCK(tpg_lock);
  52 static LIST_HEAD(tpg_list);
  53
  54 /*      core_clear_initiator_node_from_tpg():
  55  *
  56  *
  57  */
  58 static void core_clear_initiator_node_from_tpg(
  59         struct se_node_acl *nacl,
  60         struct se_portal_group *tpg)
  61 {
  62         int i;
  63         struct se_dev_entry *deve;
  64         struct se_lun *lun;
  65         struct se_lun_acl *acl, *acl_tmp;
  66
  67         spin_lock_irq(&nacl->device_list_lock);
  68         for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
  69                 deve = &nacl->device_list[i];
  70
  71                 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
  72                         continue;
  73
  74                 if (!deve->se_lun) {
  75                         printk(KERN_ERR "%s device entries device pointer is"
  76                                 " NULL, but Initiator has access.\n",
  77                                 tpg->se_tpg_tfo->get_fabric_name());
  78                         continue;
  79                 }
  80
  81                 lun = deve->se_lun;
  82                 spin_unlock_irq(&nacl->device_list_lock);
  83                 core_update_device_list_for_node(lun, NULL, deve->mapped_lun,
  84                         TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
  85
  86                 spin_lock(&lun->lun_acl_lock);
  87                 list_for_each_entry_safe(acl, acl_tmp,
  88                                         &lun->lun_acl_list, lacl_list) {
  89                         if (!(strcmp(acl->initiatorname,
  90                                         nacl->initiatorname)) &&
  91                              (acl->mapped_lun == deve->mapped_lun))
  92                                 break;
  93                 }
  94
  95                 if (!acl) {
  96                         printk(KERN_ERR "Unable to locate struct se_lun_acl for %s,"
  97                                 " mapped_lun: %u\n", nacl->initiatorname,
  98                                 deve->mapped_lun);
  99                         spin_unlock(&lun->lun_acl_lock);
 100                         spin_lock_irq(&nacl->device_list_lock);
 101                         continue;
 102                 }
 103
 104                 list_del(&acl->lacl_list);
 105                 spin_unlock(&lun->lun_acl_lock);
 106
 107                 spin_lock_irq(&nacl->device_list_lock);
 108                 kfree(acl);
 109         }
 110         spin_unlock_irq(&nacl->device_list_lock);
 111 }
 112
 113 /*      __core_tpg_get_initiator_node_acl():
 114  *
 115  *      spin_lock_bh(&tpg->acl_node_lock); must be held when calling
 116  */
 117 struct se_node_acl *__core_tpg_get_initiator_node_acl(
 118         struct se_portal_group *tpg,
 119         const char *initiatorname)
 120 {
 121         struct se_node_acl *acl;
 122
 123         list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
 124                 if (!(strcmp(acl->initiatorname, initiatorname)))
 125                         return acl;
 126         }
 127
 128         return NULL;
 129 }
 130
 131 /*      core_tpg_get_initiator_node_acl():
 132  *
 133  *
 134  */
 135 struct se_node_acl *core_tpg_get_initiator_node_acl(
 136         struct se_portal_group *tpg,
 137         unsigned char *initiatorname)
 138 {
 139         struct se_node_acl *acl;
 140
 141         spin_lock_bh(&tpg->acl_node_lock);
 142         list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
 143                 if (!(strcmp(acl->initiatorname, initiatorname)) &&
 144                    (!(acl->dynamic_node_acl))) {
 145                         spin_unlock_bh(&tpg->acl_node_lock);
 146                         return acl;
 147                 }
 148         }
 149         spin_unlock_bh(&tpg->acl_node_lock);
 150
 151         return NULL;
 152 }
 153
 154 /*      core_tpg_add_node_to_devs():
 155  *
 156  *
 157  */
 158 void core_tpg_add_node_to_devs(
 159         struct se_node_acl *acl,
 160         struct se_portal_group *tpg)
 161 {
 162         int i = 0;
 163         u32 lun_access = 0;
 164         struct se_lun *lun;
 165         struct se_device *dev;
 166
 167         spin_lock(&tpg->tpg_lun_lock);
 168         for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
 169                 lun = &tpg->tpg_lun_list[i];
 170                 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE)
 171                         continue;
 172
 173                 spin_unlock(&tpg->tpg_lun_lock);
 174
 175                 dev = lun->lun_se_dev;
 176                 /*
 177                  * By default in LIO-Target $FABRIC_MOD,
 178                  * demo_mode_write_protect is ON, or READ_ONLY;
 179                  */
 180                 if (!(tpg->se_tpg_tfo->tpg_check_demo_mode_write_protect(tpg))) {
 181                         if (dev->dev_flags & DF_READ_ONLY)
 182                                 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
 183                         else
 184                                 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
 185                 } else {
 186                         /*
 187                          * Allow only optical drives to issue R/W in default RO
 188                          * demo mode.
 189                          */
 190                         if (dev->transport->get_device_type(dev) == TYPE_DISK)
 191                                 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
 192                         else
 193                                 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
 194                 }
 195
 196                 printk(KERN_INFO "TARGET_CORE[%s]->TPG[%u]_LUN[%u] - Adding %s"
 197                         " access for LUN in Demo Mode\n",
 198                         tpg->se_tpg_tfo->get_fabric_name(),
 199                         tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
 200                         (lun_access == TRANSPORT_LUNFLAGS_READ_WRITE) ?
 201                         "READ-WRITE" : "READ-ONLY");
 202
 203                 core_update_device_list_for_node(lun, NULL, lun->unpacked_lun,
 204                                 lun_access, acl, tpg, 1);
 205                 spin_lock(&tpg->tpg_lun_lock);
 206         }
 207         spin_unlock(&tpg->tpg_lun_lock);
 208 }
 209
 210 /*      core_set_queue_depth_for_node():
 211  *
 212  *
 213  */
 214 static int core_set_queue_depth_for_node(
 215         struct se_portal_group *tpg,
 216         struct se_node_acl *acl)
 217 {
 218         if (!acl->queue_depth) {
 219                 printk(KERN_ERR "Queue depth for %s Initiator Node: %s is 0,"
 220                         "defaulting to 1.\n", tpg->se_tpg_tfo->get_fabric_name(),
 221                         acl->initiatorname);
 222                 acl->queue_depth = 1;
 223         }
 224
 225         return 0;
 226 }
 227
 228 /*      core_create_device_list_for_node():
 229  *
 230  *
 231  */
 232 static int core_create_device_list_for_node(struct se_node_acl *nacl)
 233 {
 234         struct se_dev_entry *deve;
 235         int i;
 236
 237         nacl->device_list = kzalloc(sizeof(struct se_dev_entry) *
 238                                 TRANSPORT_MAX_LUNS_PER_TPG, GFP_KERNEL);
 239         if (!(nacl->device_list)) {
 240                 printk(KERN_ERR "Unable to allocate memory for"
 241                         " struct se_node_acl->device_list\n");
 242                 return -ENOMEM;
 243         }
 244         for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
 245                 deve = &nacl->device_list[i];
 246
 247                 atomic_set(&deve->ua_count, 0);
 248                 atomic_set(&deve->pr_ref_count, 0);
 249                 spin_lock_init(&deve->ua_lock);
 250                 INIT_LIST_HEAD(&deve->alua_port_list);
 251                 INIT_LIST_HEAD(&deve->ua_list);
 252         }
 253
 254         return 0;
 255 }
 256
 257 /*      core_tpg_check_initiator_node_acl()
 258  *
 259  *
 260  */
 261 struct se_node_acl *core_tpg_check_initiator_node_acl(
 262         struct se_portal_group *tpg,
 263         unsigned char *initiatorname)
 264 {
 265         struct se_node_acl *acl;
 266
 267         acl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
 268         if ((acl))
 269                 return acl;
 270
 271         if (!(tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)))
 272                 return NULL;
 273
 274         acl =  tpg->se_tpg_tfo->tpg_alloc_fabric_acl(tpg);
 275         if (!(acl))
 276                 return NULL;
 277
 278         INIT_LIST_HEAD(&acl->acl_list);
 279         INIT_LIST_HEAD(&acl->acl_sess_list);
 280         spin_lock_init(&acl->device_list_lock);
 281         spin_lock_init(&acl->nacl_sess_lock);
 282         atomic_set(&acl->acl_pr_ref_count, 0);
 283         acl->queue_depth = tpg->se_tpg_tfo->tpg_get_default_depth(tpg);
 284         snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
 285         acl->se_tpg = tpg;
 286         acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX);
 287         spin_lock_init(&acl->stats_lock);
 288         acl->dynamic_node_acl = 1;
 289
 290         tpg->se_tpg_tfo->set_default_node_attributes(acl);
 291
 292         if (core_create_device_list_for_node(acl) < 0) {
 293                 tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
 294                 return NULL;
 295         }
 296
 297         if (core_set_queue_depth_for_node(tpg, acl) < 0) {
 298                 core_free_device_list_for_node(acl, tpg);
 299                 tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
 300                 return NULL;
 301         }
 302
 303         core_tpg_add_node_to_devs(acl, tpg);
 304
 305         spin_lock_bh(&tpg->acl_node_lock);
 306         list_add_tail(&acl->acl_list, &tpg->acl_node_list);
 307         tpg->num_node_acls++;
 308         spin_unlock_bh(&tpg->acl_node_lock);
 309
 310         printk("%s_TPG[%u] - Added DYNAMIC ACL with TCQ Depth: %d for %s"
 311                 " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
 312                 tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth,
 313                 tpg->se_tpg_tfo->get_fabric_name(), initiatorname);
 314
 315         return acl;
 316 }
 317 EXPORT_SYMBOL(core_tpg_check_initiator_node_acl);
 318
 319 void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl *nacl)
 320 {
 321         while (atomic_read(&nacl->acl_pr_ref_count) != 0)
 322                 cpu_relax();
 323 }
 324
 325 void core_tpg_clear_object_luns(struct se_portal_group *tpg)
 326 {
 327         int i, ret;
 328         struct se_lun *lun;
 329
 330         spin_lock(&tpg->tpg_lun_lock);
 331         for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
 332                 lun = &tpg->tpg_lun_list[i];
 333
 334                 if ((lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) ||
 335                     (lun->lun_se_dev == NULL))
 336                         continue;
 337
 338                 spin_unlock(&tpg->tpg_lun_lock);
 339                 ret = core_dev_del_lun(tpg, lun->unpacked_lun);
 340                 spin_lock(&tpg->tpg_lun_lock);
 341         }
 342         spin_unlock(&tpg->tpg_lun_lock);
 343 }
 344 EXPORT_SYMBOL(core_tpg_clear_object_luns);
 345
 346 /*      core_tpg_add_initiator_node_acl():
 347  *
 348  *
 349  */
 350 struct se_node_acl *core_tpg_add_initiator_node_acl(
 351         struct se_portal_group *tpg,
 352         struct se_node_acl *se_nacl,
 353         const char *initiatorname,
 354         u32 queue_depth)
 355 {
 356         struct se_node_acl *acl = NULL;
 357
 358         spin_lock_bh(&tpg->acl_node_lock);
 359         acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname);
 360         if ((acl)) {
 361                 if (acl->dynamic_node_acl) {
 362                         acl->dynamic_node_acl = 0;
 363                         printk(KERN_INFO "%s_TPG[%u] - Replacing dynamic ACL"
 364                                 " for %s\n", tpg->se_tpg_tfo->get_fabric_name(),
 365                                 tpg->se_tpg_tfo->tpg_get_tag(tpg), initiatorname);
 366                         spin_unlock_bh(&tpg->acl_node_lock);
 367                         /*
 368                          * Release the locally allocated struct se_node_acl
 369                          * because * core_tpg_add_initiator_node_acl() returned
 370                          * a pointer to an existing demo mode node ACL.
 371                          */
 372                         if (se_nacl)
 373                                 tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg,
 374                                                         se_nacl);
 375                         goto done;
 376                 }
 377
 378                 printk(KERN_ERR "ACL entry for %s Initiator"
 379                         " Node %s already exists for TPG %u, ignoring"
 380                         " request.\n",  tpg->se_tpg_tfo->get_fabric_name(),
 381                         initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg));
 382                 spin_unlock_bh(&tpg->acl_node_lock);
 383                 return ERR_PTR(-EEXIST);
 384         }
 385         spin_unlock_bh(&tpg->acl_node_lock);
 386
 387         if (!(se_nacl)) {
 388                 printk("struct se_node_acl pointer is NULL\n");
 389                 return ERR_PTR(-EINVAL);
 390         }
 391         /*
 392          * For v4.x logic the se_node_acl_s is hanging off a fabric
 393          * dependent structure allocated via
 394          * struct target_core_fabric_ops->fabric_make_nodeacl()
 395          */
 396         acl = se_nacl;
 397
 398         INIT_LIST_HEAD(&acl->acl_list);
 399         INIT_LIST_HEAD(&acl->acl_sess_list);
 400         spin_lock_init(&acl->device_list_lock);
 401         spin_lock_init(&acl->nacl_sess_lock);
 402         atomic_set(&acl->acl_pr_ref_count, 0);
 403         acl->queue_depth = queue_depth;
 404         snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
 405         acl->se_tpg = tpg;
 406         acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX);
 407         spin_lock_init(&acl->stats_lock);
 408
 409         tpg->se_tpg_tfo->set_default_node_attributes(acl);
 410
 411         if (core_create_device_list_for_node(acl) < 0) {
 412                 tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
 413                 return ERR_PTR(-ENOMEM);
 414         }
 415
 416         if (core_set_queue_depth_for_node(tpg, acl) < 0) {
 417                 core_free_device_list_for_node(acl, tpg);
 418                 tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
 419                 return ERR_PTR(-EINVAL);
 420         }
 421
 422         spin_lock_bh(&tpg->acl_node_lock);
 423         list_add_tail(&acl->acl_list, &tpg->acl_node_list);
 424         tpg->num_node_acls++;
 425         spin_unlock_bh(&tpg->acl_node_lock);
 426
 427 done:
 428         printk(KERN_INFO "%s_TPG[%hu] - Added ACL with TCQ Depth: %d for %s"
 429                 " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
 430                 tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth,
 431                 tpg->se_tpg_tfo->get_fabric_name(), initiatorname);
 432
 433         return acl;
 434 }
 435 EXPORT_SYMBOL(core_tpg_add_initiator_node_acl);
 436
 437 /*      core_tpg_del_initiator_node_acl():
 438  *
 439  *
 440  */
 441 int core_tpg_del_initiator_node_acl(
 442         struct se_portal_group *tpg,
 443         struct se_node_acl *acl,
 444         int force)
 445 {
 446         struct se_session *sess, *sess_tmp;
 447         int dynamic_acl = 0;
 448
 449         spin_lock_bh(&tpg->acl_node_lock);
 450         if (acl->dynamic_node_acl) {
 451                 acl->dynamic_node_acl = 0;
 452                 dynamic_acl = 1;
 453         }
 454         list_del(&acl->acl_list);
 455         tpg->num_node_acls--;
 456         spin_unlock_bh(&tpg->acl_node_lock);
 457
 458         spin_lock_bh(&tpg->session_lock);
 459         list_for_each_entry_safe(sess, sess_tmp,
 460                                 &tpg->tpg_sess_list, sess_list) {
 461                 if (sess->se_node_acl != acl)
 462                         continue;
 463                 /*
 464                  * Determine if the session needs to be closed by our context.
 465                  */
 466                 if (!(tpg->se_tpg_tfo->shutdown_session(sess)))
 467                         continue;
 468
 469                 spin_unlock_bh(&tpg->session_lock);
 470                 /*
 471                  * If the $FABRIC_MOD session for the Initiator Node ACL exists,
 472                  * forcefully shutdown the $FABRIC_MOD session/nexus.
 473                  */
 474                 tpg->se_tpg_tfo->close_session(sess);
 475
 476                 spin_lock_bh(&tpg->session_lock);
 477         }
 478         spin_unlock_bh(&tpg->session_lock);
 479
 480         core_tpg_wait_for_nacl_pr_ref(acl);
 481         core_clear_initiator_node_from_tpg(acl, tpg);
 482         core_free_device_list_for_node(acl, tpg);
 483
 484         printk(KERN_INFO "%s_TPG[%hu] - Deleted ACL with TCQ Depth: %d for %s"
 485                 " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
 486                 tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth,
 487                 tpg->se_tpg_tfo->get_fabric_name(), acl->initiatorname);
 488
 489         return 0;
 490 }
 491 EXPORT_SYMBOL(core_tpg_del_initiator_node_acl);
 492
 493 /*      core_tpg_set_initiator_node_queue_depth():
 494  *
 495  *
 496  */
 497 int core_tpg_set_initiator_node_queue_depth(
 498         struct se_portal_group *tpg,
 499         unsigned char *initiatorname,
 500         u32 queue_depth,
 501         int force)
 502 {
 503         struct se_session *sess, *init_sess = NULL;
 504         struct se_node_acl *acl;
 505         int dynamic_acl = 0;
 506
 507         spin_lock_bh(&tpg->acl_node_lock);
 508         acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname);
 509         if (!(acl)) {
 510                 printk(KERN_ERR "Access Control List entry for %s Initiator"
 511                         " Node %s does not exists for TPG %hu, ignoring"
 512                         " request.\n", tpg->se_tpg_tfo->get_fabric_name(),
 513                         initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg));
 514                 spin_unlock_bh(&tpg->acl_node_lock);
 515                 return -ENODEV;
 516         }
 517         if (acl->dynamic_node_acl) {
 518                 acl->dynamic_node_acl = 0;
 519                 dynamic_acl = 1;
 520         }
 521         spin_unlock_bh(&tpg->acl_node_lock);
 522
 523         spin_lock_bh(&tpg->session_lock);
 524         list_for_each_entry(sess, &tpg->tpg_sess_list, sess_list) {
 525                 if (sess->se_node_acl != acl)
 526                         continue;
 527
 528                 if (!force) {
 529                         printk(KERN_ERR "Unable to change queue depth for %s"
 530                                 " Initiator Node: %s while session is"
 531                                 " operational.  To forcefully change the queue"
 532                                 " depth and force session reinstatement"
 533                                 " use the \"force=1\" parameter.\n",
 534                                 tpg->se_tpg_tfo->get_fabric_name(), initiatorname);
 535                         spin_unlock_bh(&tpg->session_lock);
 536
 537                         spin_lock_bh(&tpg->acl_node_lock);
 538                         if (dynamic_acl)
 539                                 acl->dynamic_node_acl = 1;
 540                         spin_unlock_bh(&tpg->acl_node_lock);
 541                         return -EEXIST;
 542                 }
 543                 /*
 544                  * Determine if the session needs to be closed by our context.
 545                  */
 546                 if (!(tpg->se_tpg_tfo->shutdown_session(sess)))
 547                         continue;
 548
 549                 init_sess = sess;
 550                 break;
 551         }
 552
 553         /*
 554          * User has requested to change the queue depth for a Initiator Node.
 555          * Change the value in the Node's struct se_node_acl, and call
 556          * core_set_queue_depth_for_node() to add the requested queue depth.
 557          *
 558          * Finally call  tpg->se_tpg_tfo->close_session() to force session
 559          * reinstatement to occur if there is an active session for the
 560          * $FABRIC_MOD Initiator Node in question.
 561          */
 562         acl->queue_depth = queue_depth;
 563
 564         if (core_set_queue_depth_for_node(tpg, acl) < 0) {
 565                 spin_unlock_bh(&tpg->session_lock);
 566                 /*
 567                  * Force session reinstatement if
 568                  * core_set_queue_depth_for_node() failed, because we assume
 569                  * the $FABRIC_MOD has already the set session reinstatement
 570                  * bit from tpg->se_tpg_tfo->shutdown_session() called above.
 571                  */
 572                 if (init_sess)
 573                         tpg->se_tpg_tfo->close_session(init_sess);
 574
 575                 spin_lock_bh(&tpg->acl_node_lock);
 576                 if (dynamic_acl)
 577                         acl->dynamic_node_acl = 1;
 578                 spin_unlock_bh(&tpg->acl_node_lock);
 579                 return -EINVAL;
 580         }
 581         spin_unlock_bh(&tpg->session_lock);
 582         /*
 583          * If the $FABRIC_MOD session for the Initiator Node ACL exists,
 584          * forcefully shutdown the $FABRIC_MOD session/nexus.
 585          */
 586         if (init_sess)
 587                 tpg->se_tpg_tfo->close_session(init_sess);
 588
 589         printk(KERN_INFO "Successfuly changed queue depth to: %d for Initiator"
 590                 " Node: %s on %s Target Portal Group: %u\n", queue_depth,
 591                 initiatorname, tpg->se_tpg_tfo->get_fabric_name(),
 592                 tpg->se_tpg_tfo->tpg_get_tag(tpg));
 593
 594         spin_lock_bh(&tpg->acl_node_lock);
 595         if (dynamic_acl)
 596                 acl->dynamic_node_acl = 1;
 597         spin_unlock_bh(&tpg->acl_node_lock);
 598
 599         return 0;
 600 }
 601 EXPORT_SYMBOL(core_tpg_set_initiator_node_queue_depth);
 602
 603 static int core_tpg_setup_virtual_lun0(struct se_portal_group *se_tpg)
 604 {
 605         /* Set in core_dev_setup_virtual_lun0() */
 606         struct se_device *dev = g_lun0_dev;
 607         struct se_lun *lun = &se_tpg->tpg_virt_lun0;
 608         u32 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
 609         int ret;
 610
 611         lun->unpacked_lun = 0;
 612         lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
 613         atomic_set(&lun->lun_acl_count, 0);
 614         init_completion(&lun->lun_shutdown_comp);
 615         INIT_LIST_HEAD(&lun->lun_acl_list);
 616         INIT_LIST_HEAD(&lun->lun_cmd_list);
 617         spin_lock_init(&lun->lun_acl_lock);
 618         spin_lock_init(&lun->lun_cmd_lock);
 619         spin_lock_init(&lun->lun_sep_lock);
 620
 621         ret = core_tpg_post_addlun(se_tpg, lun, lun_access, dev);
 622         if (ret < 0)
 623                 return ret;
 624
 625         return 0;
 626 }
 627
 628 static void core_tpg_release_virtual_lun0(struct se_portal_group *se_tpg)
 629 {
 630         struct se_lun *lun = &se_tpg->tpg_virt_lun0;
 631
 632         core_tpg_post_dellun(se_tpg, lun);
 633 }
 634
 635 int core_tpg_register(
 636         struct target_core_fabric_ops *tfo,
 637         struct se_wwn *se_wwn,
 638         struct se_portal_group *se_tpg,
 639         void *tpg_fabric_ptr,
 640         int se_tpg_type)
 641 {
 642         struct se_lun *lun;
 643         u32 i;
 644
 645         se_tpg->tpg_lun_list = kzalloc((sizeof(struct se_lun) *
 646                                 TRANSPORT_MAX_LUNS_PER_TPG), GFP_KERNEL);
 647         if (!(se_tpg->tpg_lun_list)) {
 648                 printk(KERN_ERR "Unable to allocate struct se_portal_group->"
 649                                 "tpg_lun_list\n");
 650                 return -ENOMEM;
 651         }
 652
 653         for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
 654                 lun = &se_tpg->tpg_lun_list[i];
 655                 lun->unpacked_lun = i;
 656                 lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
 657                 atomic_set(&lun->lun_acl_count, 0);
 658                 init_completion(&lun->lun_shutdown_comp);
 659                 INIT_LIST_HEAD(&lun->lun_acl_list);
 660                 INIT_LIST_HEAD(&lun->lun_cmd_list);
 661                 spin_lock_init(&lun->lun_acl_lock);
 662                 spin_lock_init(&lun->lun_cmd_lock);
 663                 spin_lock_init(&lun->lun_sep_lock);
 664         }
 665
 666         se_tpg->se_tpg_type = se_tpg_type;
 667         se_tpg->se_tpg_fabric_ptr = tpg_fabric_ptr;
 668         se_tpg->se_tpg_tfo = tfo;
 669         se_tpg->se_tpg_wwn = se_wwn;
 670         atomic_set(&se_tpg->tpg_pr_ref_count, 0);
 671         INIT_LIST_HEAD(&se_tpg->acl_node_list);
 672         INIT_LIST_HEAD(&se_tpg->se_tpg_node);
 673         INIT_LIST_HEAD(&se_tpg->tpg_sess_list);
 674         spin_lock_init(&se_tpg->acl_node_lock);
 675         spin_lock_init(&se_tpg->session_lock);
 676         spin_lock_init(&se_tpg->tpg_lun_lock);
 677
 678         if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) {
 679                 if (core_tpg_setup_virtual_lun0(se_tpg) < 0) {
 680                         kfree(se_tpg);
 681                         return -ENOMEM;
 682                 }
 683         }
 684
 685         spin_lock_bh(&tpg_lock);
 686         list_add_tail(&se_tpg->se_tpg_node, &tpg_list);
 687         spin_unlock_bh(&tpg_lock);
 688
 689         printk(KERN_INFO "TARGET_CORE[%s]: Allocated %s struct se_portal_group for"
 690                 " endpoint: %s, Portal Tag: %u\n", tfo->get_fabric_name(),
 691                 (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ?
 692                 "Normal" : "Discovery", (tfo->tpg_get_wwn(se_tpg) == NULL) ?
 693                 "None" : tfo->tpg_get_wwn(se_tpg), tfo->tpg_get_tag(se_tpg));
 694
 695         return 0;
 696 }
 697 EXPORT_SYMBOL(core_tpg_register);
 698
 699 int core_tpg_deregister(struct se_portal_group *se_tpg)
 700 {
 701         struct se_node_acl *nacl, *nacl_tmp;
 702
 703         printk(KERN_INFO "TARGET_CORE[%s]: Deallocating %s struct se_portal_group"
 704                 " for endpoint: %s Portal Tag %u\n",
 705                 (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ?
 706                 "Normal" : "Discovery", se_tpg->se_tpg_tfo->get_fabric_name(),
 707                 se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg),
 708                 se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg));
 709
 710         spin_lock_bh(&tpg_lock);
 711         list_del(&se_tpg->se_tpg_node);
 712         spin_unlock_bh(&tpg_lock);
 713
 714         while (atomic_read(&se_tpg->tpg_pr_ref_count) != 0)
 715                 cpu_relax();
 716         /*
 717          * Release any remaining demo-mode generated se_node_acl that have
 718          * not been released because of TFO->tpg_check_demo_mode_cache() == 1
 719          * in transport_deregister_session().
 720          */
 721         spin_lock_bh(&se_tpg->acl_node_lock);
 722         list_for_each_entry_safe(nacl, nacl_tmp, &se_tpg->acl_node_list,
 723                         acl_list) {
 724                 list_del(&nacl->acl_list);
 725                 se_tpg->num_node_acls--;
 726                 spin_unlock_bh(&se_tpg->acl_node_lock);
 727
 728                 core_tpg_wait_for_nacl_pr_ref(nacl);
 729                 core_free_device_list_for_node(nacl, se_tpg);
 730                 se_tpg->se_tpg_tfo->tpg_release_fabric_acl(se_tpg, nacl);
 731
 732                 spin_lock_bh(&se_tpg->acl_node_lock);
 733         }
 734         spin_unlock_bh(&se_tpg->acl_node_lock);
 735
 736         if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL)
 737                 core_tpg_release_virtual_lun0(se_tpg);
 738
 739         se_tpg->se_tpg_fabric_ptr = NULL;
 740         kfree(se_tpg->tpg_lun_list);
 741         return 0;
 742 }
 743 EXPORT_SYMBOL(core_tpg_deregister);
 744
 745 struct se_lun *core_tpg_pre_addlun(
 746         struct se_portal_group *tpg,
 747         u32 unpacked_lun)
 748 {
 749         struct se_lun *lun;
 750
 751         if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
 752                 printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG"
 753                         "-1: %u for Target Portal Group: %u\n",
 754                         tpg->se_tpg_tfo->get_fabric_name(),
 755                         unpacked_lun, TRANSPORT_MAX_LUNS_PER_TPG-1,
 756                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
 757                 return ERR_PTR(-EOVERFLOW);
 758         }
 759
 760         spin_lock(&tpg->tpg_lun_lock);
 761         lun = &tpg->tpg_lun_list[unpacked_lun];
 762         if (lun->lun_status == TRANSPORT_LUN_STATUS_ACTIVE) {
 763                 printk(KERN_ERR "TPG Logical Unit Number: %u is already active"
 764                         " on %s Target Portal Group: %u, ignoring request.\n",
 765                         unpacked_lun, tpg->se_tpg_tfo->get_fabric_name(),
 766                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
 767                 spin_unlock(&tpg->tpg_lun_lock);
 768                 return ERR_PTR(-EINVAL);
 769         }
 770         spin_unlock(&tpg->tpg_lun_lock);
 771
 772         return lun;
 773 }
 774
 775 int core_tpg_post_addlun(
 776         struct se_portal_group *tpg,
 777         struct se_lun *lun,
 778         u32 lun_access,
 779         void *lun_ptr)
 780 {
 781         int ret;
 782
 783         ret = core_dev_export(lun_ptr, tpg, lun);
 784         if (ret < 0)
 785                 return ret;
 786
 787         spin_lock(&tpg->tpg_lun_lock);
 788         lun->lun_access = lun_access;
 789         lun->lun_status = TRANSPORT_LUN_STATUS_ACTIVE;
 790         spin_unlock(&tpg->tpg_lun_lock);
 791
 792         return 0;
 793 }
 794
 795 static void core_tpg_shutdown_lun(
 796         struct se_portal_group *tpg,
 797         struct se_lun *lun)
 798 {
 799         core_clear_lun_from_tpg(lun, tpg);
 800         transport_clear_lun_from_sessions(lun);
 801 }
 802
 803 struct se_lun *core_tpg_pre_dellun(
 804         struct se_portal_group *tpg,
 805         u32 unpacked_lun,
 806         int *ret)
 807 {
 808         struct se_lun *lun;
 809
 810         if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
 811                 printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG"
 812                         "-1: %u for Target Portal Group: %u\n",
 813                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
 814                         TRANSPORT_MAX_LUNS_PER_TPG-1,
 815                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
 816                 return ERR_PTR(-EOVERFLOW);
 817         }
 818
 819         spin_lock(&tpg->tpg_lun_lock);
 820         lun = &tpg->tpg_lun_list[unpacked_lun];
 821         if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
 822                 printk(KERN_ERR "%s Logical Unit Number: %u is not active on"
 823                         " Target Portal Group: %u, ignoring request.\n",
 824                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
 825                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
 826                 spin_unlock(&tpg->tpg_lun_lock);
 827                 return ERR_PTR(-ENODEV);
 828         }
 829         spin_unlock(&tpg->tpg_lun_lock);
 830
 831         return lun;
 832 }
 833
 834 int core_tpg_post_dellun(
 835         struct se_portal_group *tpg,
 836         struct se_lun *lun)
 837 {
 838         core_tpg_shutdown_lun(tpg, lun);
 839
 840         core_dev_unexport(lun->lun_se_dev, tpg, lun);
 841
 842         spin_lock(&tpg->tpg_lun_lock);
 843         lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
 844         spin_unlock(&tpg->tpg_lun_lock);
 845
 846         return 0;
 847 }