drivers/target/target_core_device.c

   1 /*******************************************************************************
   2  * Filename:  target_core_device.c (based on iscsi_target_device.c)
   3  *
   4  * This file contains the iSCSI Virtual Device and Disk Transport
   5  * agnostic related functions.
   6  *
   7  * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
   8  * Copyright (c) 2005-2006 SBE, Inc.  All Rights Reserved.
   9  * Copyright (c) 2007-2010 Rising Tide Systems
  10  * Copyright (c) 2008-2010 Linux-iSCSI.org
  11  *
  12  * Nicholas A. Bellinger <nab@kernel.org>
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  27  *
  28  ******************************************************************************/
  29
  30 #include <linux/net.h>
  31 #include <linux/string.h>
  32 #include <linux/delay.h>
  33 #include <linux/timer.h>
  34 #include <linux/slab.h>
  35 #include <linux/spinlock.h>
  36 #include <linux/smp_lock.h>
  37 #include <linux/kthread.h>
  38 #include <linux/in.h>
  39 #include <net/sock.h>
  40 #include <net/tcp.h>
  41 #include <scsi/scsi.h>
  42
  43 #include <target/target_core_base.h>
  44 #include <target/target_core_device.h>
  45 #include <target/target_core_tpg.h>
  46 #include <target/target_core_transport.h>
  47 #include <target/target_core_fabric_ops.h>
  48
  49 #include "target_core_alua.h"
  50 #include "target_core_hba.h"
  51 #include "target_core_pr.h"
  52 #include "target_core_ua.h"
  53
  54 static void se_dev_start(struct se_device *dev);
  55 static void se_dev_stop(struct se_device *dev);
  56
  57 int transport_get_lun_for_cmd(
  58         struct se_cmd *se_cmd,
  59         unsigned char *cdb,
  60         u32 unpacked_lun)
  61 {
  62         struct se_dev_entry *deve;
  63         struct se_lun *se_lun = NULL;
  64         struct se_session *se_sess = SE_SESS(se_cmd);
  65         unsigned long flags;
  66         int read_only = 0;
  67
  68         spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
  69         deve = se_cmd->se_deve =
  70                         &SE_NODE_ACL(se_sess)->device_list[unpacked_lun];
  71         if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
  72                 if (se_cmd) {
  73                         deve->total_cmds++;
  74                         deve->total_bytes += se_cmd->data_length;
  75
  76                         if (se_cmd->data_direction == DMA_TO_DEVICE) {
  77                                 if (deve->lun_flags &
  78                                                 TRANSPORT_LUNFLAGS_READ_ONLY) {
  79                                         read_only = 1;
  80                                         goto out;
  81                                 }
  82                                 deve->write_bytes += se_cmd->data_length;
  83                         } else if (se_cmd->data_direction ==
  84                                    DMA_FROM_DEVICE) {
  85                                 deve->read_bytes += se_cmd->data_length;
  86                         }
  87                 }
  88                 deve->deve_cmds++;
  89
  90                 se_lun = se_cmd->se_lun = deve->se_lun;
  91                 se_cmd->pr_res_key = deve->pr_res_key;
  92                 se_cmd->orig_fe_lun = unpacked_lun;
  93                 se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev;
  94                 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
  95         }
  96 out:
  97         spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
  98
  99         if (!se_lun) {
 100                 if (read_only) {
 101                         se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
 102                         se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 103                         printk("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
 104                                 " Access for 0x%08x\n",
 105                                 CMD_TFO(se_cmd)->get_fabric_name(),
 106                                 unpacked_lun);
 107                         return -1;
 108                 } else {
 109                         /*
 110                          * Use the se_portal_group->tpg_virt_lun0 to allow for
 111                          * REPORT_LUNS, et al to be returned when no active
 112                          * MappedLUN=0 exists for this Initiator Port.
 113                          */
 114                         if (unpacked_lun != 0) {
 115                                 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
 116                                 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 117                                 printk("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
 118                                         " Access for 0x%08x\n",
 119                                         CMD_TFO(se_cmd)->get_fabric_name(),
 120                                         unpacked_lun);
 121                                 return -1;
 122                         }
 123                         /*
 124                          * Force WRITE PROTECT for virtual LUN 0
 125                          */
 126                         if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
 127                             (se_cmd->data_direction != DMA_NONE)) {
 128                                 se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
 129                                 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 130                                 return -1;
 131                         }
 132 #if 0
 133                         printk("TARGET_CORE[%s]: Using virtual LUN0! :-)\n",
 134                                 CMD_TFO(se_cmd)->get_fabric_name());
 135 #endif
 136                         se_lun = se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0;
 137                         se_cmd->orig_fe_lun = 0;
 138                         se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev;
 139                         se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
 140                 }
 141         }
 142         /*
 143          * Determine if the struct se_lun is online.
 144          */
 145 /* #warning FIXME: Check for LUN_RESET + UNIT Attention */
 146         if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
 147                 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
 148                 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 149                 return -1;
 150         }
 151
 152         {
 153         struct se_device *dev = se_lun->lun_se_dev;
 154         spin_lock(&dev->stats_lock);
 155         dev->num_cmds++;
 156         if (se_cmd->data_direction == DMA_TO_DEVICE)
 157                 dev->write_bytes += se_cmd->data_length;
 158         else if (se_cmd->data_direction == DMA_FROM_DEVICE)
 159                 dev->read_bytes += se_cmd->data_length;
 160         spin_unlock(&dev->stats_lock);
 161         }
 162
 163         /*
 164          * Add the iscsi_cmd_t to the struct se_lun's cmd list.  This list is used
 165          * for tracking state of struct se_cmds during LUN shutdown events.
 166          */
 167         spin_lock_irqsave(&se_lun->lun_cmd_lock, flags);
 168         list_add_tail(&se_cmd->se_lun_list, &se_lun->lun_cmd_list);
 169         atomic_set(&T_TASK(se_cmd)->transport_lun_active, 1);
 170 #if 0
 171         printk(KERN_INFO "Adding ITT: 0x%08x to LUN LIST[%d]\n",
 172                 CMD_TFO(se_cmd)->get_task_tag(se_cmd), se_lun->unpacked_lun);
 173 #endif
 174         spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags);
 175
 176         return 0;
 177 }
 178 EXPORT_SYMBOL(transport_get_lun_for_cmd);
 179
 180 int transport_get_lun_for_tmr(
 181         struct se_cmd *se_cmd,
 182         u32 unpacked_lun)
 183 {
 184         struct se_device *dev = NULL;
 185         struct se_dev_entry *deve;
 186         struct se_lun *se_lun = NULL;
 187         struct se_session *se_sess = SE_SESS(se_cmd);
 188         struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
 189
 190         spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
 191         deve = se_cmd->se_deve =
 192                         &SE_NODE_ACL(se_sess)->device_list[unpacked_lun];
 193         if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
 194                 se_lun = se_cmd->se_lun = se_tmr->tmr_lun = deve->se_lun;
 195                 dev = se_tmr->tmr_dev = se_lun->lun_se_dev;
 196                 se_cmd->pr_res_key = deve->pr_res_key;
 197                 se_cmd->orig_fe_lun = unpacked_lun;
 198                 se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev;
 199 /*              se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; */
 200         }
 201         spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
 202
 203         if (!se_lun) {
 204                 printk(KERN_INFO "TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
 205                         " Access for 0x%08x\n",
 206                         CMD_TFO(se_cmd)->get_fabric_name(),
 207                         unpacked_lun);
 208                 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 209                 return -1;
 210         }
 211         /*
 212          * Determine if the struct se_lun is online.
 213          */
 214 /* #warning FIXME: Check for LUN_RESET + UNIT Attention */
 215         if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
 216                 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 217                 return -1;
 218         }
 219
 220         spin_lock(&dev->se_tmr_lock);
 221         list_add_tail(&se_tmr->tmr_list, &dev->dev_tmr_list);
 222         spin_unlock(&dev->se_tmr_lock);
 223
 224         return 0;
 225 }
 226 EXPORT_SYMBOL(transport_get_lun_for_tmr);
 227
 228 /*
 229  * This function is called from core_scsi3_emulate_pro_register_and_move()
 230  * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count
 231  * when a matching rtpi is found.
 232  */
 233 struct se_dev_entry *core_get_se_deve_from_rtpi(
 234         struct se_node_acl *nacl,
 235         u16 rtpi)
 236 {
 237         struct se_dev_entry *deve;
 238         struct se_lun *lun;
 239         struct se_port *port;
 240         struct se_portal_group *tpg = nacl->se_tpg;
 241         u32 i;
 242
 243         spin_lock_irq(&nacl->device_list_lock);
 244         for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
 245                 deve = &nacl->device_list[i];
 246
 247                 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
 248                         continue;
 249
 250                 lun = deve->se_lun;
 251                 if (!(lun)) {
 252                         printk(KERN_ERR "%s device entries device pointer is"
 253                                 " NULL, but Initiator has access.\n",
 254                                 TPG_TFO(tpg)->get_fabric_name());
 255                         continue;
 256                 }
 257                 port = lun->lun_sep;
 258                 if (!(port)) {
 259                         printk(KERN_ERR "%s device entries device pointer is"
 260                                 " NULL, but Initiator has access.\n",
 261                                 TPG_TFO(tpg)->get_fabric_name());
 262                         continue;
 263                 }
 264                 if (port->sep_rtpi != rtpi)
 265                         continue;
 266
 267                 atomic_inc(&deve->pr_ref_count);
 268                 smp_mb__after_atomic_inc();
 269                 spin_unlock_irq(&nacl->device_list_lock);
 270
 271                 return deve;
 272         }
 273         spin_unlock_irq(&nacl->device_list_lock);
 274
 275         return NULL;
 276 }
 277
 278 int core_free_device_list_for_node(
 279         struct se_node_acl *nacl,
 280         struct se_portal_group *tpg)
 281 {
 282         struct se_dev_entry *deve;
 283         struct se_lun *lun;
 284         u32 i;
 285
 286         if (!nacl->device_list)
 287                 return 0;
 288
 289         spin_lock_irq(&nacl->device_list_lock);
 290         for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
 291                 deve = &nacl->device_list[i];
 292
 293                 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
 294                         continue;
 295
 296                 if (!deve->se_lun) {
 297                         printk(KERN_ERR "%s device entries device pointer is"
 298                                 " NULL, but Initiator has access.\n",
 299                                 TPG_TFO(tpg)->get_fabric_name());
 300                         continue;
 301                 }
 302                 lun = deve->se_lun;
 303
 304                 spin_unlock_irq(&nacl->device_list_lock);
 305                 core_update_device_list_for_node(lun, NULL, deve->mapped_lun,
 306                         TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
 307                 spin_lock_irq(&nacl->device_list_lock);
 308         }
 309         spin_unlock_irq(&nacl->device_list_lock);
 310
 311         kfree(nacl->device_list);
 312         nacl->device_list = NULL;
 313
 314         return 0;
 315 }
 316
 317 void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd)
 318 {
 319         struct se_dev_entry *deve;
 320
 321         spin_lock_irq(&se_nacl->device_list_lock);
 322         deve = &se_nacl->device_list[se_cmd->orig_fe_lun];
 323         deve->deve_cmds--;
 324         spin_unlock_irq(&se_nacl->device_list_lock);
 325
 326         return;
 327 }
 328
 329 void core_update_device_list_access(
 330         u32 mapped_lun,
 331         u32 lun_access,
 332         struct se_node_acl *nacl)
 333 {
 334         struct se_dev_entry *deve;
 335
 336         spin_lock_irq(&nacl->device_list_lock);
 337         deve = &nacl->device_list[mapped_lun];
 338         if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
 339                 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
 340                 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
 341         } else {
 342                 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
 343                 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
 344         }
 345         spin_unlock_irq(&nacl->device_list_lock);
 346
 347         return;
 348 }
 349
 350 /*      core_update_device_list_for_node():
 351  *
 352  *
 353  */
 354 int core_update_device_list_for_node(
 355         struct se_lun *lun,
 356         struct se_lun_acl *lun_acl,
 357         u32 mapped_lun,
 358         u32 lun_access,
 359         struct se_node_acl *nacl,
 360         struct se_portal_group *tpg,
 361         int enable)
 362 {
 363         struct se_port *port = lun->lun_sep;
 364         struct se_dev_entry *deve = &nacl->device_list[mapped_lun];
 365         int trans = 0;
 366         /*
 367          * If the MappedLUN entry is being disabled, the entry in
 368          * port->sep_alua_list must be removed now before clearing the
 369          * struct se_dev_entry pointers below as logic in
 370          * core_alua_do_transition_tg_pt() depends on these being present.
 371          */
 372         if (!(enable)) {
 373                 /*
 374                  * deve->se_lun_acl will be NULL for demo-mode created LUNs
 375                  * that have not been explictly concerted to MappedLUNs ->
 376                  * struct se_lun_acl, but we remove deve->alua_port_list from
 377                  * port->sep_alua_list. This also means that active UAs and
 378                  * NodeACL context specific PR metadata for demo-mode
 379                  * MappedLUN *deve will be released below..
 380                  */
 381                 spin_lock_bh(&port->sep_alua_lock);
 382                 list_del(&deve->alua_port_list);
 383                 spin_unlock_bh(&port->sep_alua_lock);
 384         }
 385
 386         spin_lock_irq(&nacl->device_list_lock);
 387         if (enable) {
 388                 /*
 389                  * Check if the call is handling demo mode -> explict LUN ACL
 390                  * transition.  This transition must be for the same struct se_lun
 391                  * + mapped_lun that was setup in demo mode..
 392                  */
 393                 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
 394                         if (deve->se_lun_acl != NULL) {
 395                                 printk(KERN_ERR "struct se_dev_entry->se_lun_acl"
 396                                         " already set for demo mode -> explict"
 397                                         " LUN ACL transition\n");
 398                                 spin_unlock_irq(&nacl->device_list_lock);
 399                                 return -1;
 400                         }
 401                         if (deve->se_lun != lun) {
 402                                 printk(KERN_ERR "struct se_dev_entry->se_lun does"
 403                                         " match passed struct se_lun for demo mode"
 404                                         " -> explict LUN ACL transition\n");
 405                                 spin_unlock_irq(&nacl->device_list_lock);
 406                                 return -1;
 407                         }
 408                         deve->se_lun_acl = lun_acl;
 409                         trans = 1;
 410                 } else {
 411                         deve->se_lun = lun;
 412                         deve->se_lun_acl = lun_acl;
 413                         deve->mapped_lun = mapped_lun;
 414                         deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS;
 415                 }
 416
 417                 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
 418                         deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
 419                         deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
 420                 } else {
 421                         deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
 422                         deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
 423                 }
 424
 425                 if (trans) {
 426                         spin_unlock_irq(&nacl->device_list_lock);
 427                         return 0;
 428                 }
 429                 deve->creation_time = get_jiffies_64();
 430                 deve->attach_count++;
 431                 spin_unlock_irq(&nacl->device_list_lock);
 432
 433                 spin_lock_bh(&port->sep_alua_lock);
 434                 list_add_tail(&deve->alua_port_list, &port->sep_alua_list);
 435                 spin_unlock_bh(&port->sep_alua_lock);
 436
 437                 return 0;
 438         }
 439         /*
 440          * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
 441          * PR operation to complete.
 442          */
 443         spin_unlock_irq(&nacl->device_list_lock);
 444         while (atomic_read(&deve->pr_ref_count) != 0)
 445                 cpu_relax();
 446         spin_lock_irq(&nacl->device_list_lock);
 447         /*
 448          * Disable struct se_dev_entry LUN ACL mapping
 449          */
 450         core_scsi3_ua_release_all(deve);
 451         deve->se_lun = NULL;
 452         deve->se_lun_acl = NULL;
 453         deve->lun_flags = 0;
 454         deve->creation_time = 0;
 455         deve->attach_count--;
 456         spin_unlock_irq(&nacl->device_list_lock);
 457
 458         core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl);
 459         return 0;
 460 }
 461
 462 /*      core_clear_lun_from_tpg():
 463  *
 464  *
 465  */
 466 void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
 467 {
 468         struct se_node_acl *nacl;
 469         struct se_dev_entry *deve;
 470         u32 i;
 471
 472         spin_lock_bh(&tpg->acl_node_lock);
 473         list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
 474                 spin_unlock_bh(&tpg->acl_node_lock);
 475
 476                 spin_lock_irq(&nacl->device_list_lock);
 477                 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
 478                         deve = &nacl->device_list[i];
 479                         if (lun != deve->se_lun)
 480                                 continue;
 481                         spin_unlock_irq(&nacl->device_list_lock);
 482
 483                         core_update_device_list_for_node(lun, NULL,
 484                                 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS,
 485                                 nacl, tpg, 0);
 486
 487                         spin_lock_irq(&nacl->device_list_lock);
 488                 }
 489                 spin_unlock_irq(&nacl->device_list_lock);
 490
 491                 spin_lock_bh(&tpg->acl_node_lock);
 492         }
 493         spin_unlock_bh(&tpg->acl_node_lock);
 494
 495         return;
 496 }
 497
 498 static struct se_port *core_alloc_port(struct se_device *dev)
 499 {
 500         struct se_port *port, *port_tmp;
 501
 502         port = kzalloc(sizeof(struct se_port), GFP_KERNEL);
 503         if (!(port)) {
 504                 printk(KERN_ERR "Unable to allocate struct se_port\n");
 505                 return NULL;
 506         }
 507         INIT_LIST_HEAD(&port->sep_alua_list);
 508         INIT_LIST_HEAD(&port->sep_list);
 509         atomic_set(&port->sep_tg_pt_secondary_offline, 0);
 510         spin_lock_init(&port->sep_alua_lock);
 511         mutex_init(&port->sep_tg_pt_md_mutex);
 512
 513         spin_lock(&dev->se_port_lock);
 514         if (dev->dev_port_count == 0x0000ffff) {
 515                 printk(KERN_WARNING "Reached dev->dev_port_count =="
 516                                 " 0x0000ffff\n");
 517                 spin_unlock(&dev->se_port_lock);
 518                 return NULL;
 519         }
 520 again:
 521         /*
 522          * Allocate the next RELATIVE TARGET PORT IDENTIFER for this struct se_device
 523          * Here is the table from spc4r17 section 7.7.3.8.
 524          *
 525          *    Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
 526          *
 527          * Code      Description
 528          * 0h        Reserved
 529          * 1h        Relative port 1, historically known as port A
 530          * 2h        Relative port 2, historically known as port B
 531          * 3h to FFFFh    Relative port 3 through 65 535
 532          */
 533         port->sep_rtpi = dev->dev_rpti_counter++;
 534         if (!(port->sep_rtpi))
 535                 goto again;
 536
 537         list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) {
 538                 /*
 539                  * Make sure RELATIVE TARGET PORT IDENTIFER is unique
 540                  * for 16-bit wrap..
 541                  */
 542                 if (port->sep_rtpi == port_tmp->sep_rtpi)
 543                         goto again;
 544         }
 545         spin_unlock(&dev->se_port_lock);
 546
 547         return port;
 548 }
 549
 550 static void core_export_port(
 551         struct se_device *dev,
 552         struct se_portal_group *tpg,
 553         struct se_port *port,
 554         struct se_lun *lun)
 555 {
 556         struct se_subsystem_dev *su_dev = SU_DEV(dev);
 557         struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL;
 558
 559         spin_lock(&dev->se_port_lock);
 560         spin_lock(&lun->lun_sep_lock);
 561         port->sep_tpg = tpg;
 562         port->sep_lun = lun;
 563         lun->lun_sep = port;
 564         spin_unlock(&lun->lun_sep_lock);
 565
 566         list_add_tail(&port->sep_list, &dev->dev_sep_list);
 567         spin_unlock(&dev->se_port_lock);
 568
 569         if (T10_ALUA(su_dev)->alua_type == SPC3_ALUA_EMULATED) {
 570                 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port);
 571                 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) {
 572                         printk(KERN_ERR "Unable to allocate t10_alua_tg_pt"
 573                                         "_gp_member_t\n");
 574                         return;
 575                 }
 576                 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
 577                 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
 578                         T10_ALUA(su_dev)->default_tg_pt_gp);
 579                 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
 580                 printk(KERN_INFO "%s/%s: Adding to default ALUA Target Port"
 581                         " Group: alua/default_tg_pt_gp\n",
 582                         TRANSPORT(dev)->name, TPG_TFO(tpg)->get_fabric_name());
 583         }
 584
 585         dev->dev_port_count++;
 586         port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFER */
 587 }
 588
 589 /*
 590  *      Called with struct se_device->se_port_lock spinlock held.
 591  */
 592 static void core_release_port(struct se_device *dev, struct se_port *port)
 593 {
 594         /*
 595          * Wait for any port reference for PR ALL_TG_PT=1 operation
 596          * to complete in __core_scsi3_alloc_registration()
 597          */
 598         spin_unlock(&dev->se_port_lock);
 599         if (atomic_read(&port->sep_tg_pt_ref_cnt))
 600                 cpu_relax();
 601         spin_lock(&dev->se_port_lock);
 602
 603         core_alua_free_tg_pt_gp_mem(port);
 604
 605         list_del(&port->sep_list);
 606         dev->dev_port_count--;
 607         kfree(port);
 608
 609         return;
 610 }
 611
 612 int core_dev_export(
 613         struct se_device *dev,
 614         struct se_portal_group *tpg,
 615         struct se_lun *lun)
 616 {
 617         struct se_port *port;
 618
 619         port = core_alloc_port(dev);
 620         if (!(port))
 621                 return -1;
 622
 623         lun->lun_se_dev = dev;
 624         se_dev_start(dev);
 625
 626         atomic_inc(&dev->dev_export_obj.obj_access_count);
 627         core_export_port(dev, tpg, port, lun);
 628         return 0;
 629 }
 630
 631 void core_dev_unexport(
 632         struct se_device *dev,
 633         struct se_portal_group *tpg,
 634         struct se_lun *lun)
 635 {
 636         struct se_port *port = lun->lun_sep;
 637
 638         spin_lock(&lun->lun_sep_lock);
 639         if (lun->lun_se_dev == NULL) {
 640                 spin_unlock(&lun->lun_sep_lock);
 641                 return;
 642         }
 643         spin_unlock(&lun->lun_sep_lock);
 644
 645         spin_lock(&dev->se_port_lock);
 646         atomic_dec(&dev->dev_export_obj.obj_access_count);
 647         core_release_port(dev, port);
 648         spin_unlock(&dev->se_port_lock);
 649
 650         se_dev_stop(dev);
 651         lun->lun_se_dev = NULL;
 652 }
 653
 654 int transport_core_report_lun_response(struct se_cmd *se_cmd)
 655 {
 656         struct se_dev_entry *deve;
 657         struct se_lun *se_lun;
 658         struct se_session *se_sess = SE_SESS(se_cmd);
 659         struct se_task *se_task;
 660         unsigned char *buf = (unsigned char *)T_TASK(se_cmd)->t_task_buf;
 661         u32 cdb_offset = 0, lun_count = 0, offset = 8;
 662         u64 i, lun;
 663
 664         list_for_each_entry(se_task, &T_TASK(se_cmd)->t_task_list, t_list)
 665                 break;
 666
 667         if (!(se_task)) {
 668                 printk(KERN_ERR "Unable to locate struct se_task for struct se_cmd\n");
 669                 return PYX_TRANSPORT_LU_COMM_FAILURE;
 670         }
 671
 672         /*
 673          * If no struct se_session pointer is present, this struct se_cmd is
 674          * coming via a target_core_mod PASSTHROUGH op, and not through
 675          * a $FABRIC_MOD.  In that case, report LUN=0 only.
 676          */
 677         if (!(se_sess)) {
 678                 lun = 0;
 679                 buf[offset++] = ((lun >> 56) & 0xff);
 680                 buf[offset++] = ((lun >> 48) & 0xff);
 681                 buf[offset++] = ((lun >> 40) & 0xff);
 682                 buf[offset++] = ((lun >> 32) & 0xff);
 683                 buf[offset++] = ((lun >> 24) & 0xff);
 684                 buf[offset++] = ((lun >> 16) & 0xff);
 685                 buf[offset++] = ((lun >> 8) & 0xff);
 686                 buf[offset++] = (lun & 0xff);
 687                 lun_count = 1;
 688                 goto done;
 689         }
 690
 691         spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
 692         for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
 693                 deve = &SE_NODE_ACL(se_sess)->device_list[i];
 694                 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
 695                         continue;
 696                 se_lun = deve->se_lun;
 697                 /*
 698                  * We determine the correct LUN LIST LENGTH even once we
 699                  * have reached the initial allocation length.
 700                  * See SPC2-R20 7.19.
 701                  */
 702                 lun_count++;
 703                 if ((cdb_offset + 8) >= se_cmd->data_length)
 704                         continue;
 705
 706                 lun = cpu_to_be64(CMD_TFO(se_cmd)->pack_lun(deve->mapped_lun));
 707                 buf[offset++] = ((lun >> 56) & 0xff);
 708                 buf[offset++] = ((lun >> 48) & 0xff);
 709                 buf[offset++] = ((lun >> 40) & 0xff);
 710                 buf[offset++] = ((lun >> 32) & 0xff);
 711                 buf[offset++] = ((lun >> 24) & 0xff);
 712                 buf[offset++] = ((lun >> 16) & 0xff);
 713                 buf[offset++] = ((lun >> 8) & 0xff);
 714                 buf[offset++] = (lun & 0xff);
 715                 cdb_offset += 8;
 716         }
 717         spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
 718
 719         /*
 720          * See SPC3 r07, page 159.
 721          */
 722 done:
 723         lun_count *= 8;
 724         buf[0] = ((lun_count >> 24) & 0xff);
 725         buf[1] = ((lun_count >> 16) & 0xff);
 726         buf[2] = ((lun_count >> 8) & 0xff);
 727         buf[3] = (lun_count & 0xff);
 728
 729         return PYX_TRANSPORT_SENT_TO_TRANSPORT;
 730 }
 731
 732 /*      se_release_device_for_hba():
 733  *
 734  *
 735  */
 736 void se_release_device_for_hba(struct se_device *dev)
 737 {
 738         struct se_hba *hba = dev->se_hba;
 739
 740         if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
 741             (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) ||
 742             (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) ||
 743             (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) ||
 744             (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED))
 745                 se_dev_stop(dev);
 746
 747         if (dev->dev_ptr) {
 748                 kthread_stop(dev->process_thread);
 749                 if (dev->transport->free_device)
 750                         dev->transport->free_device(dev->dev_ptr);
 751         }
 752
 753         spin_lock(&hba->device_lock);
 754         list_del(&dev->dev_list);
 755         hba->dev_count--;
 756         spin_unlock(&hba->device_lock);
 757
 758         core_scsi3_free_all_registrations(dev);
 759         se_release_vpd_for_dev(dev);
 760
 761         kfree(dev->dev_status_queue_obj);
 762         kfree(dev->dev_queue_obj);
 763         kfree(dev);
 764
 765         return;
 766 }
 767
 768 void se_release_vpd_for_dev(struct se_device *dev)
 769 {
 770         struct t10_vpd *vpd, *vpd_tmp;
 771
 772         spin_lock(&DEV_T10_WWN(dev)->t10_vpd_lock);
 773         list_for_each_entry_safe(vpd, vpd_tmp,
 774                         &DEV_T10_WWN(dev)->t10_vpd_list, vpd_list) {
 775                 list_del(&vpd->vpd_list);
 776                 kfree(vpd);
 777         }
 778         spin_unlock(&DEV_T10_WWN(dev)->t10_vpd_lock);
 779
 780         return;
 781 }
 782
 783 /*
 784  * Called with struct se_hba->device_lock held.
 785  */
 786 void se_clear_dev_ports(struct se_device *dev)
 787 {
 788         struct se_hba *hba = dev->se_hba;
 789         struct se_lun *lun;
 790         struct se_portal_group *tpg;
 791         struct se_port *sep, *sep_tmp;
 792
 793         spin_lock(&dev->se_port_lock);
 794         list_for_each_entry_safe(sep, sep_tmp, &dev->dev_sep_list, sep_list) {
 795                 spin_unlock(&dev->se_port_lock);
 796                 spin_unlock(&hba->device_lock);
 797
 798                 lun = sep->sep_lun;
 799                 tpg = sep->sep_tpg;
 800                 spin_lock(&lun->lun_sep_lock);
 801                 if (lun->lun_se_dev == NULL) {
 802                         spin_unlock(&lun->lun_sep_lock);
 803                         continue;
 804                 }
 805                 spin_unlock(&lun->lun_sep_lock);
 806
 807                 core_dev_del_lun(tpg, lun->unpacked_lun);
 808
 809                 spin_lock(&hba->device_lock);
 810                 spin_lock(&dev->se_port_lock);
 811         }
 812         spin_unlock(&dev->se_port_lock);
 813
 814         return;
 815 }
 816
 817 /*      se_free_virtual_device():
 818  *
 819  *      Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers.
 820  */
 821 int se_free_virtual_device(struct se_device *dev, struct se_hba *hba)
 822 {
 823         spin_lock(&hba->device_lock);
 824         se_clear_dev_ports(dev);
 825         spin_unlock(&hba->device_lock);
 826
 827         core_alua_free_lu_gp_mem(dev);
 828         se_release_device_for_hba(dev);
 829
 830         return 0;
 831 }
 832
 833 static void se_dev_start(struct se_device *dev)
 834 {
 835         struct se_hba *hba = dev->se_hba;
 836
 837         spin_lock(&hba->device_lock);
 838         atomic_inc(&dev->dev_obj.obj_access_count);
 839         if (atomic_read(&dev->dev_obj.obj_access_count) == 1) {
 840                 if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) {
 841                         dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED;
 842                         dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED;
 843                 } else if (dev->dev_status &
 844                            TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) {
 845                         dev->dev_status &=
 846                                 ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
 847                         dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
 848                 }
 849         }
 850         spin_unlock(&hba->device_lock);
 851 }
 852
 853 static void se_dev_stop(struct se_device *dev)
 854 {
 855         struct se_hba *hba = dev->se_hba;
 856
 857         spin_lock(&hba->device_lock);
 858         atomic_dec(&dev->dev_obj.obj_access_count);
 859         if (atomic_read(&dev->dev_obj.obj_access_count) == 0) {
 860                 if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) {
 861                         dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED;
 862                         dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED;
 863                 } else if (dev->dev_status &
 864                            TRANSPORT_DEVICE_OFFLINE_ACTIVATED) {
 865                         dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
 866                         dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
 867                 }
 868         }
 869         spin_unlock(&hba->device_lock);
 870
 871         while (atomic_read(&hba->dev_mib_access_count))
 872                 cpu_relax();
 873 }
 874
 875 int se_dev_check_online(struct se_device *dev)
 876 {
 877         int ret;
 878
 879         spin_lock_irq(&dev->dev_status_lock);
 880         ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
 881                (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1;
 882         spin_unlock_irq(&dev->dev_status_lock);
 883
 884         return ret;
 885 }
 886
 887 int se_dev_check_shutdown(struct se_device *dev)
 888 {
 889         int ret;
 890
 891         spin_lock_irq(&dev->dev_status_lock);
 892         ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN);
 893         spin_unlock_irq(&dev->dev_status_lock);
 894
 895         return ret;
 896 }
 897
 898 void se_dev_set_default_attribs(
 899         struct se_device *dev,
 900         struct se_dev_limits *dev_limits)
 901 {
 902         struct queue_limits *limits = &dev_limits->limits;
 903
 904         DEV_ATTRIB(dev)->emulate_dpo = DA_EMULATE_DPO;
 905         DEV_ATTRIB(dev)->emulate_fua_write = DA_EMULATE_FUA_WRITE;
 906         DEV_ATTRIB(dev)->emulate_fua_read = DA_EMULATE_FUA_READ;
 907         DEV_ATTRIB(dev)->emulate_write_cache = DA_EMULATE_WRITE_CACHE;
 908         DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
 909         DEV_ATTRIB(dev)->emulate_tas = DA_EMULATE_TAS;
 910         DEV_ATTRIB(dev)->emulate_tpu = DA_EMULATE_TPU;
 911         DEV_ATTRIB(dev)->emulate_tpws = DA_EMULATE_TPWS;
 912         DEV_ATTRIB(dev)->emulate_reservations = DA_EMULATE_RESERVATIONS;
 913         DEV_ATTRIB(dev)->emulate_alua = DA_EMULATE_ALUA;
 914         DEV_ATTRIB(dev)->enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
 915         /*
 916          * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK
 917          * iblock_create_virtdevice() from struct queue_limits values
 918          * if blk_queue_discard()==1
 919          */
 920         DEV_ATTRIB(dev)->max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
 921         DEV_ATTRIB(dev)->max_unmap_block_desc_count =
 922                                 DA_MAX_UNMAP_BLOCK_DESC_COUNT;
 923         DEV_ATTRIB(dev)->unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
 924         DEV_ATTRIB(dev)->unmap_granularity_alignment =
 925                                 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
 926         /*
 927          * block_size is based on subsystem plugin dependent requirements.
 928          */
 929         DEV_ATTRIB(dev)->hw_block_size = limits->logical_block_size;
 930         DEV_ATTRIB(dev)->block_size = limits->logical_block_size;
 931         /*
 932          * max_sectors is based on subsystem plugin dependent requirements.
 933          */
 934         DEV_ATTRIB(dev)->hw_max_sectors = limits->max_hw_sectors;
 935         DEV_ATTRIB(dev)->max_sectors = limits->max_sectors;
 936         /*
 937          * Set optimal_sectors from max_sectors, which can be lowered via
 938          * configfs.
 939          */
 940         DEV_ATTRIB(dev)->optimal_sectors = limits->max_sectors;
 941         /*
 942          * queue_depth is based on subsystem plugin dependent requirements.
 943          */
 944         DEV_ATTRIB(dev)->hw_queue_depth = dev_limits->hw_queue_depth;
 945         DEV_ATTRIB(dev)->queue_depth = dev_limits->queue_depth;
 946 }
 947
 948 int se_dev_set_task_timeout(struct se_device *dev, u32 task_timeout)
 949 {
 950         if (task_timeout > DA_TASK_TIMEOUT_MAX) {
 951                 printk(KERN_ERR "dev[%p]: Passed task_timeout: %u larger then"
 952                         " DA_TASK_TIMEOUT_MAX\n", dev, task_timeout);
 953                 return -1;
 954         } else {
 955                 DEV_ATTRIB(dev)->task_timeout = task_timeout;
 956                 printk(KERN_INFO "dev[%p]: Set SE Device task_timeout: %u\n",
 957                         dev, task_timeout);
 958         }
 959
 960         return 0;
 961 }
 962
 963 int se_dev_set_max_unmap_lba_count(
 964         struct se_device *dev,
 965         u32 max_unmap_lba_count)
 966 {
 967         DEV_ATTRIB(dev)->max_unmap_lba_count = max_unmap_lba_count;
 968         printk(KERN_INFO "dev[%p]: Set max_unmap_lba_count: %u\n",
 969                         dev, DEV_ATTRIB(dev)->max_unmap_lba_count);
 970         return 0;
 971 }
 972
 973 int se_dev_set_max_unmap_block_desc_count(
 974         struct se_device *dev,
 975         u32 max_unmap_block_desc_count)
 976 {
 977         DEV_ATTRIB(dev)->max_unmap_block_desc_count = max_unmap_block_desc_count;
 978         printk(KERN_INFO "dev[%p]: Set max_unmap_block_desc_count: %u\n",
 979                         dev, DEV_ATTRIB(dev)->max_unmap_block_desc_count);
 980         return 0;
 981 }
 982
 983 int se_dev_set_unmap_granularity(
 984         struct se_device *dev,
 985         u32 unmap_granularity)
 986 {
 987         DEV_ATTRIB(dev)->unmap_granularity = unmap_granularity;
 988         printk(KERN_INFO "dev[%p]: Set unmap_granularity: %u\n",
 989                         dev, DEV_ATTRIB(dev)->unmap_granularity);
 990         return 0;
 991 }
 992
 993 int se_dev_set_unmap_granularity_alignment(
 994         struct se_device *dev,
 995         u32 unmap_granularity_alignment)
 996 {
 997         DEV_ATTRIB(dev)->unmap_granularity_alignment = unmap_granularity_alignment;
 998         printk(KERN_INFO "dev[%p]: Set unmap_granularity_alignment: %u\n",
 999                         dev, DEV_ATTRIB(dev)->unmap_granularity_alignment);
1000         return 0;
1001 }
1002
1003 int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
1004 {
1005         if ((flag != 0) && (flag != 1)) {
1006                 printk(KERN_ERR "Illegal value %d\n", flag);
1007                 return -1;
1008         }
1009         if (TRANSPORT(dev)->dpo_emulated == NULL) {
1010                 printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated is NULL\n");
1011                 return -1;
1012         }
1013         if (TRANSPORT(dev)->dpo_emulated(dev) == 0) {
1014                 printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated not supported\n");
1015                 return -1;
1016         }
1017         DEV_ATTRIB(dev)->emulate_dpo = flag;
1018         printk(KERN_INFO "dev[%p]: SE Device Page Out (DPO) Emulation"
1019                         " bit: %d\n", dev, DEV_ATTRIB(dev)->emulate_dpo);
1020         return 0;
1021 }
1022
1023 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
1024 {
1025         if ((flag != 0) && (flag != 1)) {
1026                 printk(KERN_ERR "Illegal value %d\n", flag);
1027                 return -1;
1028         }
1029         if (TRANSPORT(dev)->fua_write_emulated == NULL) {
1030                 printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated is NULL\n");
1031                 return -1;
1032         }
1033         if (TRANSPORT(dev)->fua_write_emulated(dev) == 0) {
1034                 printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated not supported\n");
1035                 return -1;
1036         }
1037         DEV_ATTRIB(dev)->emulate_fua_write = flag;
1038         printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
1039                         dev, DEV_ATTRIB(dev)->emulate_fua_write);
1040         return 0;
1041 }
1042
1043 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
1044 {
1045         if ((flag != 0) && (flag != 1)) {
1046                 printk(KERN_ERR "Illegal value %d\n", flag);
1047                 return -1;
1048         }
1049         if (TRANSPORT(dev)->fua_read_emulated == NULL) {
1050                 printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated is NULL\n");
1051                 return -1;
1052         }
1053         if (TRANSPORT(dev)->fua_read_emulated(dev) == 0) {
1054                 printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated not supported\n");
1055                 return -1;
1056         }
1057         DEV_ATTRIB(dev)->emulate_fua_read = flag;
1058         printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access READs: %d\n",
1059                         dev, DEV_ATTRIB(dev)->emulate_fua_read);
1060         return 0;
1061 }
1062
1063 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
1064 {
1065         if ((flag != 0) && (flag != 1)) {
1066                 printk(KERN_ERR "Illegal value %d\n", flag);
1067                 return -1;
1068         }
1069         if (TRANSPORT(dev)->write_cache_emulated == NULL) {
1070                 printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated is NULL\n");
1071                 return -1;
1072         }
1073         if (TRANSPORT(dev)->write_cache_emulated(dev) == 0) {
1074                 printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated not supported\n");
1075                 return -1;
1076         }
1077         DEV_ATTRIB(dev)->emulate_write_cache = flag;
1078         printk(KERN_INFO "dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
1079                         dev, DEV_ATTRIB(dev)->emulate_write_cache);
1080         return 0;
1081 }
1082
1083 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
1084 {
1085         if ((flag != 0) && (flag != 1) && (flag != 2)) {
1086                 printk(KERN_ERR "Illegal value %d\n", flag);
1087                 return -1;
1088         }
1089
1090         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1091                 printk(KERN_ERR "dev[%p]: Unable to change SE Device"
1092                         " UA_INTRLCK_CTRL while dev_export_obj: %d count"
1093                         " exists\n", dev,
1094                         atomic_read(&dev->dev_export_obj.obj_access_count));
1095                 return -1;
1096         }
1097         DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = flag;
1098         printk(KERN_INFO "dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
1099                 dev, DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl);
1100
1101         return 0;
1102 }
1103
1104 int se_dev_set_emulate_tas(struct se_device *dev, int flag)
1105 {
1106         if ((flag != 0) && (flag != 1)) {
1107                 printk(KERN_ERR "Illegal value %d\n", flag);
1108                 return -1;
1109         }
1110
1111         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1112                 printk(KERN_ERR "dev[%p]: Unable to change SE Device TAS while"
1113                         " dev_export_obj: %d count exists\n", dev,
1114                         atomic_read(&dev->dev_export_obj.obj_access_count));
1115                 return -1;
1116         }
1117         DEV_ATTRIB(dev)->emulate_tas = flag;
1118         printk(KERN_INFO "dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
1119                 dev, (DEV_ATTRIB(dev)->emulate_tas) ? "Enabled" : "Disabled");
1120
1121         return 0;
1122 }
1123
1124 int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
1125 {
1126         if ((flag != 0) && (flag != 1)) {
1127                 printk(KERN_ERR "Illegal value %d\n", flag);
1128                 return -1;
1129         }
1130         /*
1131          * We expect this value to be non-zero when generic Block Layer
1132          * Discard supported is detected iblock_create_virtdevice().
1133          */
1134         if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) {
1135                 printk(KERN_ERR "Generic Block Discard not supported\n");
1136                 return -ENOSYS;
1137         }
1138
1139         DEV_ATTRIB(dev)->emulate_tpu = flag;
1140         printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
1141                                 dev, flag);
1142         return 0;
1143 }
1144
1145 int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
1146 {
1147         if ((flag != 0) && (flag != 1)) {
1148                 printk(KERN_ERR "Illegal value %d\n", flag);
1149                 return -1;
1150         }
1151         /*
1152          * We expect this value to be non-zero when generic Block Layer
1153          * Discard supported is detected iblock_create_virtdevice().
1154          */
1155         if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) {
1156                 printk(KERN_ERR "Generic Block Discard not supported\n");
1157                 return -ENOSYS;
1158         }
1159
1160         DEV_ATTRIB(dev)->emulate_tpws = flag;
1161         printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
1162                                 dev, flag);
1163         return 0;
1164 }
1165
1166 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
1167 {
1168         if ((flag != 0) && (flag != 1)) {
1169                 printk(KERN_ERR "Illegal value %d\n", flag);
1170                 return -1;
1171         }
1172         DEV_ATTRIB(dev)->enforce_pr_isids = flag;
1173         printk(KERN_INFO "dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
1174                 (DEV_ATTRIB(dev)->enforce_pr_isids) ? "Enabled" : "Disabled");
1175         return 0;
1176 }
1177
1178 /*
1179  * Note, this can only be called on unexported SE Device Object.
1180  */
1181 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
1182 {
1183         u32 orig_queue_depth = dev->queue_depth;
1184
1185         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1186                 printk(KERN_ERR "dev[%p]: Unable to change SE Device TCQ while"
1187                         " dev_export_obj: %d count exists\n", dev,
1188                         atomic_read(&dev->dev_export_obj.obj_access_count));
1189                 return -1;
1190         }
1191         if (!(queue_depth)) {
1192                 printk(KERN_ERR "dev[%p]: Illegal ZERO value for queue"
1193                         "_depth\n", dev);
1194                 return -1;
1195         }
1196
1197         if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1198                 if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) {
1199                         printk(KERN_ERR "dev[%p]: Passed queue_depth: %u"
1200                                 " exceeds TCM/SE_Device TCQ: %u\n",
1201                                 dev, queue_depth,
1202                                 DEV_ATTRIB(dev)->hw_queue_depth);
1203                         return -1;
1204                 }
1205         } else {
1206                 if (queue_depth > DEV_ATTRIB(dev)->queue_depth) {
1207                         if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) {
1208                                 printk(KERN_ERR "dev[%p]: Passed queue_depth:"
1209                                         " %u exceeds TCM/SE_Device MAX"
1210                                         " TCQ: %u\n", dev, queue_depth,
1211                                         DEV_ATTRIB(dev)->hw_queue_depth);
1212                                 return -1;
1213                         }
1214                 }
1215         }
1216
1217         DEV_ATTRIB(dev)->queue_depth = dev->queue_depth = queue_depth;
1218         if (queue_depth > orig_queue_depth)
1219                 atomic_add(queue_depth - orig_queue_depth, &dev->depth_left);
1220         else if (queue_depth < orig_queue_depth)
1221                 atomic_sub(orig_queue_depth - queue_depth, &dev->depth_left);
1222
1223         printk(KERN_INFO "dev[%p]: SE Device TCQ Depth changed to: %u\n",
1224                         dev, queue_depth);
1225         return 0;
1226 }
1227
1228 int se_dev_set_max_sectors(struct se_device *dev, u32 max_sectors)
1229 {
1230         int force = 0; /* Force setting for VDEVS */
1231
1232         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1233                 printk(KERN_ERR "dev[%p]: Unable to change SE Device"
1234                         " max_sectors while dev_export_obj: %d count exists\n",
1235                         dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1236                 return -1;
1237         }
1238         if (!(max_sectors)) {
1239                 printk(KERN_ERR "dev[%p]: Illegal ZERO value for"
1240                         " max_sectors\n", dev);
1241                 return -1;
1242         }
1243         if (max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
1244                 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u less than"
1245                         " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, max_sectors,
1246                                 DA_STATUS_MAX_SECTORS_MIN);
1247                 return -1;
1248         }
1249         if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1250                 if (max_sectors > DEV_ATTRIB(dev)->hw_max_sectors) {
1251                         printk(KERN_ERR "dev[%p]: Passed max_sectors: %u"
1252                                 " greater than TCM/SE_Device max_sectors:"
1253                                 " %u\n", dev, max_sectors,
1254                                 DEV_ATTRIB(dev)->hw_max_sectors);
1255                          return -1;
1256                 }
1257         } else {
1258                 if (!(force) && (max_sectors >
1259                                  DEV_ATTRIB(dev)->hw_max_sectors)) {
1260                         printk(KERN_ERR "dev[%p]: Passed max_sectors: %u"
1261                                 " greater than TCM/SE_Device max_sectors"
1262                                 ": %u, use force=1 to override.\n", dev,
1263                                 max_sectors, DEV_ATTRIB(dev)->hw_max_sectors);
1264                         return -1;
1265                 }
1266                 if (max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
1267                         printk(KERN_ERR "dev[%p]: Passed max_sectors: %u"
1268                                 " greater than DA_STATUS_MAX_SECTORS_MAX:"
1269                                 " %u\n", dev, max_sectors,
1270                                 DA_STATUS_MAX_SECTORS_MAX);
1271                         return -1;
1272                 }
1273         }
1274
1275         DEV_ATTRIB(dev)->max_sectors = max_sectors;
1276         printk("dev[%p]: SE Device max_sectors changed to %u\n",
1277                         dev, max_sectors);
1278         return 0;
1279 }
1280
1281 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
1282 {
1283         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1284                 printk(KERN_ERR "dev[%p]: Unable to change SE Device"
1285                         " optimal_sectors while dev_export_obj: %d count exists\n",
1286                         dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1287                 return -EINVAL;
1288         }
1289         if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1290                 printk(KERN_ERR "dev[%p]: Passed optimal_sectors cannot be"
1291                                 " changed for TCM/pSCSI\n", dev);
1292                 return -EINVAL;
1293         }
1294         if (optimal_sectors > DEV_ATTRIB(dev)->max_sectors) {
1295                 printk(KERN_ERR "dev[%p]: Passed optimal_sectors %u cannot be"
1296                         " greater than max_sectors: %u\n", dev,
1297                         optimal_sectors, DEV_ATTRIB(dev)->max_sectors);
1298                 return -EINVAL;
1299         }
1300
1301         DEV_ATTRIB(dev)->optimal_sectors = optimal_sectors;
1302         printk(KERN_INFO "dev[%p]: SE Device optimal_sectors changed to %u\n",
1303                         dev, optimal_sectors);
1304         return 0;
1305 }
1306
1307 int se_dev_set_block_size(struct se_device *dev, u32 block_size)
1308 {
1309         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1310                 printk(KERN_ERR "dev[%p]: Unable to change SE Device block_size"
1311                         " while dev_export_obj: %d count exists\n", dev,
1312                         atomic_read(&dev->dev_export_obj.obj_access_count));
1313                 return -1;
1314         }
1315
1316         if ((block_size != 512) &&
1317             (block_size != 1024) &&
1318             (block_size != 2048) &&
1319             (block_size != 4096)) {
1320                 printk(KERN_ERR "dev[%p]: Illegal value for block_device: %u"
1321                         " for SE device, must be 512, 1024, 2048 or 4096\n",
1322                         dev, block_size);
1323                 return -1;
1324         }
1325
1326         if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1327                 printk(KERN_ERR "dev[%p]: Not allowed to change block_size for"
1328                         " Physical Device, use for Linux/SCSI to change"
1329                         " block_size for underlying hardware\n", dev);
1330                 return -1;
1331         }
1332
1333         DEV_ATTRIB(dev)->block_size = block_size;
1334         printk(KERN_INFO "dev[%p]: SE Device block_size changed to %u\n",
1335                         dev, block_size);
1336         return 0;
1337 }
1338
1339 struct se_lun *core_dev_add_lun(
1340         struct se_portal_group *tpg,
1341         struct se_hba *hba,
1342         struct se_device *dev,
1343         u32 lun)
1344 {
1345         struct se_lun *lun_p;
1346         u32 lun_access = 0;
1347
1348         if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) {
1349                 printk(KERN_ERR "Unable to export struct se_device while dev_access_obj: %d\n",
1350                         atomic_read(&dev->dev_access_obj.obj_access_count));
1351                 return NULL;
1352         }
1353
1354         lun_p = core_tpg_pre_addlun(tpg, lun);
1355         if ((IS_ERR(lun_p)) || !(lun_p))
1356                 return NULL;
1357
1358         if (dev->dev_flags & DF_READ_ONLY)
1359                 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1360         else
1361                 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
1362
1363         if (core_tpg_post_addlun(tpg, lun_p, lun_access, dev) < 0)
1364                 return NULL;
1365
1366         printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
1367                 " CORE HBA: %u\n", TPG_TFO(tpg)->get_fabric_name(),
1368                 TPG_TFO(tpg)->tpg_get_tag(tpg), lun_p->unpacked_lun,
1369                 TPG_TFO(tpg)->get_fabric_name(), hba->hba_id);
1370         /*
1371          * Update LUN maps for dynamically added initiators when
1372          * generate_node_acl is enabled.
1373          */
1374         if (TPG_TFO(tpg)->tpg_check_demo_mode(tpg)) {
1375                 struct se_node_acl *acl;
1376                 spin_lock_bh(&tpg->acl_node_lock);
1377                 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
1378                         if (acl->dynamic_node_acl) {
1379                                 spin_unlock_bh(&tpg->acl_node_lock);
1380                                 core_tpg_add_node_to_devs(acl, tpg);
1381                                 spin_lock_bh(&tpg->acl_node_lock);
1382                         }
1383                 }
1384                 spin_unlock_bh(&tpg->acl_node_lock);
1385         }
1386
1387         return lun_p;
1388 }
1389
1390 /*      core_dev_del_lun():
1391  *
1392  *
1393  */
1394 int core_dev_del_lun(
1395         struct se_portal_group *tpg,
1396         u32 unpacked_lun)
1397 {
1398         struct se_lun *lun;
1399         int ret = 0;
1400
1401         lun = core_tpg_pre_dellun(tpg, unpacked_lun, &ret);
1402         if (!(lun))
1403                 return ret;
1404
1405         core_tpg_post_dellun(tpg, lun);
1406
1407         printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from"
1408                 " device object\n", TPG_TFO(tpg)->get_fabric_name(),
1409                 TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun,
1410                 TPG_TFO(tpg)->get_fabric_name());
1411
1412         return 0;
1413 }
1414
1415 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
1416 {
1417         struct se_lun *lun;
1418
1419         spin_lock(&tpg->tpg_lun_lock);
1420         if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1421                 printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
1422                         "_PER_TPG-1: %u for Target Portal Group: %hu\n",
1423                         TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
1424                         TRANSPORT_MAX_LUNS_PER_TPG-1,
1425                         TPG_TFO(tpg)->tpg_get_tag(tpg));
1426                 spin_unlock(&tpg->tpg_lun_lock);
1427                 return NULL;
1428         }
1429         lun = &tpg->tpg_lun_list[unpacked_lun];
1430
1431         if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
1432                 printk(KERN_ERR "%s Logical Unit Number: %u is not free on"
1433                         " Target Portal Group: %hu, ignoring request.\n",
1434                         TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
1435                         TPG_TFO(tpg)->tpg_get_tag(tpg));
1436                 spin_unlock(&tpg->tpg_lun_lock);
1437                 return NULL;
1438         }
1439         spin_unlock(&tpg->tpg_lun_lock);
1440
1441         return lun;
1442 }
1443
1444 /*      core_dev_get_lun():
1445  *
1446  *
1447  */
1448 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
1449 {
1450         struct se_lun *lun;
1451
1452         spin_lock(&tpg->tpg_lun_lock);
1453         if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1454                 printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
1455                         "_TPG-1: %u for Target Portal Group: %hu\n",
1456                         TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
1457                         TRANSPORT_MAX_LUNS_PER_TPG-1,
1458                         TPG_TFO(tpg)->tpg_get_tag(tpg));
1459                 spin_unlock(&tpg->tpg_lun_lock);
1460                 return NULL;
1461         }
1462         lun = &tpg->tpg_lun_list[unpacked_lun];
1463
1464         if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
1465                 printk(KERN_ERR "%s Logical Unit Number: %u is not active on"
1466                         " Target Portal Group: %hu, ignoring request.\n",
1467                         TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
1468                         TPG_TFO(tpg)->tpg_get_tag(tpg));
1469                 spin_unlock(&tpg->tpg_lun_lock);
1470                 return NULL;
1471         }
1472         spin_unlock(&tpg->tpg_lun_lock);
1473
1474         return lun;
1475 }
1476
1477 struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
1478         struct se_portal_group *tpg,
1479         u32 mapped_lun,
1480         char *initiatorname,
1481         int *ret)
1482 {
1483         struct se_lun_acl *lacl;
1484         struct se_node_acl *nacl;
1485
1486         if (strlen(initiatorname) > TRANSPORT_IQN_LEN) {
1487                 printk(KERN_ERR "%s InitiatorName exceeds maximum size.\n",
1488                         TPG_TFO(tpg)->get_fabric_name());
1489                 *ret = -EOVERFLOW;
1490                 return NULL;
1491         }
1492         nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
1493         if (!(nacl)) {
1494                 *ret = -EINVAL;
1495                 return NULL;
1496         }
1497         lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
1498         if (!(lacl)) {
1499                 printk(KERN_ERR "Unable to allocate memory for struct se_lun_acl.\n");
1500                 *ret = -ENOMEM;
1501                 return NULL;
1502         }
1503
1504         INIT_LIST_HEAD(&lacl->lacl_list);
1505         lacl->mapped_lun = mapped_lun;
1506         lacl->se_lun_nacl = nacl;
1507         snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
1508
1509         return lacl;
1510 }
1511
1512 int core_dev_add_initiator_node_lun_acl(
1513         struct se_portal_group *tpg,
1514         struct se_lun_acl *lacl,
1515         u32 unpacked_lun,
1516         u32 lun_access)
1517 {
1518         struct se_lun *lun;
1519         struct se_node_acl *nacl;
1520
1521         lun = core_dev_get_lun(tpg, unpacked_lun);
1522         if (!(lun)) {
1523                 printk(KERN_ERR "%s Logical Unit Number: %u is not active on"
1524                         " Target Portal Group: %hu, ignoring request.\n",
1525                         TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
1526                         TPG_TFO(tpg)->tpg_get_tag(tpg));
1527                 return -EINVAL;
1528         }
1529
1530         nacl = lacl->se_lun_nacl;
1531         if (!(nacl))
1532                 return -EINVAL;
1533
1534         if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
1535             (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
1536                 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1537
1538         lacl->se_lun = lun;
1539
1540         if (core_update_device_list_for_node(lun, lacl, lacl->mapped_lun,
1541                         lun_access, nacl, tpg, 1) < 0)
1542                 return -EINVAL;
1543
1544         spin_lock(&lun->lun_acl_lock);
1545         list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
1546         atomic_inc(&lun->lun_acl_count);
1547         smp_mb__after_atomic_inc();
1548         spin_unlock(&lun->lun_acl_lock);
1549
1550         printk(KERN_INFO "%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
1551                 " InitiatorNode: %s\n", TPG_TFO(tpg)->get_fabric_name(),
1552                 TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
1553                 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
1554                 lacl->initiatorname);
1555         /*
1556          * Check to see if there are any existing persistent reservation APTPL
1557          * pre-registrations that need to be enabled for this LUN ACL..
1558          */
1559         core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl);
1560         return 0;
1561 }
1562
1563 /*      core_dev_del_initiator_node_lun_acl():
1564  *
1565  *
1566  */
1567 int core_dev_del_initiator_node_lun_acl(
1568         struct se_portal_group *tpg,
1569         struct se_lun *lun,
1570         struct se_lun_acl *lacl)
1571 {
1572         struct se_node_acl *nacl;
1573
1574         nacl = lacl->se_lun_nacl;
1575         if (!(nacl))
1576                 return -EINVAL;
1577
1578         spin_lock(&lun->lun_acl_lock);
1579         list_del(&lacl->lacl_list);
1580         atomic_dec(&lun->lun_acl_count);
1581         smp_mb__after_atomic_dec();
1582         spin_unlock(&lun->lun_acl_lock);
1583
1584         core_update_device_list_for_node(lun, NULL, lacl->mapped_lun,
1585                 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
1586
1587         lacl->se_lun = NULL;
1588
1589         printk(KERN_INFO "%s_TPG[%hu]_LUN[%u] - Removed ACL for"
1590                 " InitiatorNode: %s Mapped LUN: %u\n",
1591                 TPG_TFO(tpg)->get_fabric_name(),
1592                 TPG_TFO(tpg)->tpg_get_tag(tpg), lun->unpacked_lun,
1593                 lacl->initiatorname, lacl->mapped_lun);
1594
1595         return 0;
1596 }
1597
1598 void core_dev_free_initiator_node_lun_acl(
1599         struct se_portal_group *tpg,
1600         struct se_lun_acl *lacl)
1601 {
1602         printk("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
1603                 " Mapped LUN: %u\n", TPG_TFO(tpg)->get_fabric_name(),
1604                 TPG_TFO(tpg)->tpg_get_tag(tpg),
1605                 TPG_TFO(tpg)->get_fabric_name(),
1606                 lacl->initiatorname, lacl->mapped_lun);
1607
1608         kfree(lacl);
1609 }
1610
1611 int core_dev_setup_virtual_lun0(void)
1612 {
1613         struct se_hba *hba;
1614         struct se_device *dev;
1615         struct se_subsystem_dev *se_dev = NULL;
1616         struct se_subsystem_api *t;
1617         char buf[16];
1618         int ret;
1619
1620         hba = core_alloc_hba("rd_dr", 0, HBA_FLAGS_INTERNAL_USE);
1621         if (IS_ERR(hba))
1622                 return PTR_ERR(hba);
1623
1624         se_global->g_lun0_hba = hba;
1625         t = hba->transport;
1626
1627         se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
1628         if (!(se_dev)) {
1629                 printk(KERN_ERR "Unable to allocate memory for"
1630                                 " struct se_subsystem_dev\n");
1631                 ret = -ENOMEM;
1632                 goto out;
1633         }
1634         INIT_LIST_HEAD(&se_dev->g_se_dev_list);
1635         INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
1636         spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
1637         INIT_LIST_HEAD(&se_dev->t10_reservation.registration_list);
1638         INIT_LIST_HEAD(&se_dev->t10_reservation.aptpl_reg_list);
1639         spin_lock_init(&se_dev->t10_reservation.registration_lock);
1640         spin_lock_init(&se_dev->t10_reservation.aptpl_reg_lock);
1641         INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
1642         spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
1643         spin_lock_init(&se_dev->se_dev_lock);
1644         se_dev->t10_reservation.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
1645         se_dev->t10_wwn.t10_sub_dev = se_dev;
1646         se_dev->t10_alua.t10_sub_dev = se_dev;
1647         se_dev->se_dev_attrib.da_sub_dev = se_dev;
1648         se_dev->se_dev_hba = hba;
1649
1650         se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0");
1651         if (!(se_dev->se_dev_su_ptr)) {
1652                 printk(KERN_ERR "Unable to locate subsystem dependent pointer"
1653                         " from allocate_virtdevice()\n");
1654                 ret = -ENOMEM;
1655                 goto out;
1656         }
1657         se_global->g_lun0_su_dev = se_dev;
1658
1659         memset(buf, 0, 16);
1660         sprintf(buf, "rd_pages=8");
1661         t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf));
1662
1663         dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1664         if (!(dev) || IS_ERR(dev)) {
1665                 ret = -ENOMEM;
1666                 goto out;
1667         }
1668         se_dev->se_dev_ptr = dev;
1669         se_global->g_lun0_dev = dev;
1670
1671         return 0;
1672 out:
1673         se_global->g_lun0_su_dev = NULL;
1674         kfree(se_dev);
1675         if (se_global->g_lun0_hba) {
1676                 core_delete_hba(se_global->g_lun0_hba);
1677                 se_global->g_lun0_hba = NULL;
1678         }
1679         return ret;
1680 }
1681
1682
1683 void core_dev_release_virtual_lun0(void)
1684 {
1685         struct se_hba *hba = se_global->g_lun0_hba;
1686         struct se_subsystem_dev *su_dev = se_global->g_lun0_su_dev;
1687
1688         if (!(hba))
1689                 return;
1690
1691         if (se_global->g_lun0_dev)
1692                 se_free_virtual_device(se_global->g_lun0_dev, hba);
1693
1694         kfree(su_dev);
1695         core_delete_hba(hba);
1696 }