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
 872 int se_dev_check_online(struct se_device *dev)
 873 {
 874         int ret;
 875
 876         spin_lock_irq(&dev->dev_status_lock);
 877         ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
 878                (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1;
 879         spin_unlock_irq(&dev->dev_status_lock);
 880
 881         return ret;
 882 }
 883
 884 int se_dev_check_shutdown(struct se_device *dev)
 885 {
 886         int ret;
 887
 888         spin_lock_irq(&dev->dev_status_lock);
 889         ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN);
 890         spin_unlock_irq(&dev->dev_status_lock);
 891
 892         return ret;
 893 }
 894
 895 void se_dev_set_default_attribs(
 896         struct se_device *dev,
 897         struct se_dev_limits *dev_limits)
 898 {
 899         struct queue_limits *limits = &dev_limits->limits;
 900
 901         DEV_ATTRIB(dev)->emulate_dpo = DA_EMULATE_DPO;
 902         DEV_ATTRIB(dev)->emulate_fua_write = DA_EMULATE_FUA_WRITE;
 903         DEV_ATTRIB(dev)->emulate_fua_read = DA_EMULATE_FUA_READ;
 904         DEV_ATTRIB(dev)->emulate_write_cache = DA_EMULATE_WRITE_CACHE;
 905         DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
 906         DEV_ATTRIB(dev)->emulate_tas = DA_EMULATE_TAS;
 907         DEV_ATTRIB(dev)->emulate_tpu = DA_EMULATE_TPU;
 908         DEV_ATTRIB(dev)->emulate_tpws = DA_EMULATE_TPWS;
 909         DEV_ATTRIB(dev)->emulate_reservations = DA_EMULATE_RESERVATIONS;
 910         DEV_ATTRIB(dev)->emulate_alua = DA_EMULATE_ALUA;
 911         DEV_ATTRIB(dev)->enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
 912         /*
 913          * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK
 914          * iblock_create_virtdevice() from struct queue_limits values
 915          * if blk_queue_discard()==1
 916          */
 917         DEV_ATTRIB(dev)->max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
 918         DEV_ATTRIB(dev)->max_unmap_block_desc_count =
 919                                 DA_MAX_UNMAP_BLOCK_DESC_COUNT;
 920         DEV_ATTRIB(dev)->unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
 921         DEV_ATTRIB(dev)->unmap_granularity_alignment =
 922                                 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
 923         /*
 924          * block_size is based on subsystem plugin dependent requirements.
 925          */
 926         DEV_ATTRIB(dev)->hw_block_size = limits->logical_block_size;
 927         DEV_ATTRIB(dev)->block_size = limits->logical_block_size;
 928         /*
 929          * max_sectors is based on subsystem plugin dependent requirements.
 930          */
 931         DEV_ATTRIB(dev)->hw_max_sectors = limits->max_hw_sectors;
 932         DEV_ATTRIB(dev)->max_sectors = limits->max_sectors;
 933         /*
 934          * Set optimal_sectors from max_sectors, which can be lowered via
 935          * configfs.
 936          */
 937         DEV_ATTRIB(dev)->optimal_sectors = limits->max_sectors;
 938         /*
 939          * queue_depth is based on subsystem plugin dependent requirements.
 940          */
 941         DEV_ATTRIB(dev)->hw_queue_depth = dev_limits->hw_queue_depth;
 942         DEV_ATTRIB(dev)->queue_depth = dev_limits->queue_depth;
 943 }
 944
 945 int se_dev_set_task_timeout(struct se_device *dev, u32 task_timeout)
 946 {
 947         if (task_timeout > DA_TASK_TIMEOUT_MAX) {
 948                 printk(KERN_ERR "dev[%p]: Passed task_timeout: %u larger then"
 949                         " DA_TASK_TIMEOUT_MAX\n", dev, task_timeout);
 950                 return -1;
 951         } else {
 952                 DEV_ATTRIB(dev)->task_timeout = task_timeout;
 953                 printk(KERN_INFO "dev[%p]: Set SE Device task_timeout: %u\n",
 954                         dev, task_timeout);
 955         }
 956
 957         return 0;
 958 }
 959
 960 int se_dev_set_max_unmap_lba_count(
 961         struct se_device *dev,
 962         u32 max_unmap_lba_count)
 963 {
 964         DEV_ATTRIB(dev)->max_unmap_lba_count = max_unmap_lba_count;
 965         printk(KERN_INFO "dev[%p]: Set max_unmap_lba_count: %u\n",
 966                         dev, DEV_ATTRIB(dev)->max_unmap_lba_count);
 967         return 0;
 968 }
 969
 970 int se_dev_set_max_unmap_block_desc_count(
 971         struct se_device *dev,
 972         u32 max_unmap_block_desc_count)
 973 {
 974         DEV_ATTRIB(dev)->max_unmap_block_desc_count = max_unmap_block_desc_count;
 975         printk(KERN_INFO "dev[%p]: Set max_unmap_block_desc_count: %u\n",
 976                         dev, DEV_ATTRIB(dev)->max_unmap_block_desc_count);
 977         return 0;
 978 }
 979
 980 int se_dev_set_unmap_granularity(
 981         struct se_device *dev,
 982         u32 unmap_granularity)
 983 {
 984         DEV_ATTRIB(dev)->unmap_granularity = unmap_granularity;
 985         printk(KERN_INFO "dev[%p]: Set unmap_granularity: %u\n",
 986                         dev, DEV_ATTRIB(dev)->unmap_granularity);
 987         return 0;
 988 }
 989
 990 int se_dev_set_unmap_granularity_alignment(
 991         struct se_device *dev,
 992         u32 unmap_granularity_alignment)
 993 {
 994         DEV_ATTRIB(dev)->unmap_granularity_alignment = unmap_granularity_alignment;
 995         printk(KERN_INFO "dev[%p]: Set unmap_granularity_alignment: %u\n",
 996                         dev, DEV_ATTRIB(dev)->unmap_granularity_alignment);
 997         return 0;
 998 }
 999
1000 int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
1001 {
1002         if ((flag != 0) && (flag != 1)) {
1003                 printk(KERN_ERR "Illegal value %d\n", flag);
1004                 return -1;
1005         }
1006         if (TRANSPORT(dev)->dpo_emulated == NULL) {
1007                 printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated is NULL\n");
1008                 return -1;
1009         }
1010         if (TRANSPORT(dev)->dpo_emulated(dev) == 0) {
1011                 printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated not supported\n");
1012                 return -1;
1013         }
1014         DEV_ATTRIB(dev)->emulate_dpo = flag;
1015         printk(KERN_INFO "dev[%p]: SE Device Page Out (DPO) Emulation"
1016                         " bit: %d\n", dev, DEV_ATTRIB(dev)->emulate_dpo);
1017         return 0;
1018 }
1019
1020 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
1021 {
1022         if ((flag != 0) && (flag != 1)) {
1023                 printk(KERN_ERR "Illegal value %d\n", flag);
1024                 return -1;
1025         }
1026         if (TRANSPORT(dev)->fua_write_emulated == NULL) {
1027                 printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated is NULL\n");
1028                 return -1;
1029         }
1030         if (TRANSPORT(dev)->fua_write_emulated(dev) == 0) {
1031                 printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated not supported\n");
1032                 return -1;
1033         }
1034         DEV_ATTRIB(dev)->emulate_fua_write = flag;
1035         printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
1036                         dev, DEV_ATTRIB(dev)->emulate_fua_write);
1037         return 0;
1038 }
1039
1040 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
1041 {
1042         if ((flag != 0) && (flag != 1)) {
1043                 printk(KERN_ERR "Illegal value %d\n", flag);
1044                 return -1;
1045         }
1046         if (TRANSPORT(dev)->fua_read_emulated == NULL) {
1047                 printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated is NULL\n");
1048                 return -1;
1049         }
1050         if (TRANSPORT(dev)->fua_read_emulated(dev) == 0) {
1051                 printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated not supported\n");
1052                 return -1;
1053         }
1054         DEV_ATTRIB(dev)->emulate_fua_read = flag;
1055         printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access READs: %d\n",
1056                         dev, DEV_ATTRIB(dev)->emulate_fua_read);
1057         return 0;
1058 }
1059
1060 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
1061 {
1062         if ((flag != 0) && (flag != 1)) {
1063                 printk(KERN_ERR "Illegal value %d\n", flag);
1064                 return -1;
1065         }
1066         if (TRANSPORT(dev)->write_cache_emulated == NULL) {
1067                 printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated is NULL\n");
1068                 return -1;
1069         }
1070         if (TRANSPORT(dev)->write_cache_emulated(dev) == 0) {
1071                 printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated not supported\n");
1072                 return -1;
1073         }
1074         DEV_ATTRIB(dev)->emulate_write_cache = flag;
1075         printk(KERN_INFO "dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
1076                         dev, DEV_ATTRIB(dev)->emulate_write_cache);
1077         return 0;
1078 }
1079
1080 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
1081 {
1082         if ((flag != 0) && (flag != 1) && (flag != 2)) {
1083                 printk(KERN_ERR "Illegal value %d\n", flag);
1084                 return -1;
1085         }
1086
1087         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1088                 printk(KERN_ERR "dev[%p]: Unable to change SE Device"
1089                         " UA_INTRLCK_CTRL while dev_export_obj: %d count"
1090                         " exists\n", dev,
1091                         atomic_read(&dev->dev_export_obj.obj_access_count));
1092                 return -1;
1093         }
1094         DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = flag;
1095         printk(KERN_INFO "dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
1096                 dev, DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl);
1097
1098         return 0;
1099 }
1100
1101 int se_dev_set_emulate_tas(struct se_device *dev, int flag)
1102 {
1103         if ((flag != 0) && (flag != 1)) {
1104                 printk(KERN_ERR "Illegal value %d\n", flag);
1105                 return -1;
1106         }
1107
1108         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1109                 printk(KERN_ERR "dev[%p]: Unable to change SE Device TAS while"
1110                         " dev_export_obj: %d count exists\n", dev,
1111                         atomic_read(&dev->dev_export_obj.obj_access_count));
1112                 return -1;
1113         }
1114         DEV_ATTRIB(dev)->emulate_tas = flag;
1115         printk(KERN_INFO "dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
1116                 dev, (DEV_ATTRIB(dev)->emulate_tas) ? "Enabled" : "Disabled");
1117
1118         return 0;
1119 }
1120
1121 int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
1122 {
1123         if ((flag != 0) && (flag != 1)) {
1124                 printk(KERN_ERR "Illegal value %d\n", flag);
1125                 return -1;
1126         }
1127         /*
1128          * We expect this value to be non-zero when generic Block Layer
1129          * Discard supported is detected iblock_create_virtdevice().
1130          */
1131         if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) {
1132                 printk(KERN_ERR "Generic Block Discard not supported\n");
1133                 return -ENOSYS;
1134         }
1135
1136         DEV_ATTRIB(dev)->emulate_tpu = flag;
1137         printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
1138                                 dev, flag);
1139         return 0;
1140 }
1141
1142 int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
1143 {
1144         if ((flag != 0) && (flag != 1)) {
1145                 printk(KERN_ERR "Illegal value %d\n", flag);
1146                 return -1;
1147         }
1148         /*
1149          * We expect this value to be non-zero when generic Block Layer
1150          * Discard supported is detected iblock_create_virtdevice().
1151          */
1152         if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) {
1153                 printk(KERN_ERR "Generic Block Discard not supported\n");
1154                 return -ENOSYS;
1155         }
1156
1157         DEV_ATTRIB(dev)->emulate_tpws = flag;
1158         printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
1159                                 dev, flag);
1160         return 0;
1161 }
1162
1163 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
1164 {
1165         if ((flag != 0) && (flag != 1)) {
1166                 printk(KERN_ERR "Illegal value %d\n", flag);
1167                 return -1;
1168         }
1169         DEV_ATTRIB(dev)->enforce_pr_isids = flag;
1170         printk(KERN_INFO "dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
1171                 (DEV_ATTRIB(dev)->enforce_pr_isids) ? "Enabled" : "Disabled");
1172         return 0;
1173 }
1174
1175 /*
1176  * Note, this can only be called on unexported SE Device Object.
1177  */
1178 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
1179 {
1180         u32 orig_queue_depth = dev->queue_depth;
1181
1182         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1183                 printk(KERN_ERR "dev[%p]: Unable to change SE Device TCQ while"
1184                         " dev_export_obj: %d count exists\n", dev,
1185                         atomic_read(&dev->dev_export_obj.obj_access_count));
1186                 return -1;
1187         }
1188         if (!(queue_depth)) {
1189                 printk(KERN_ERR "dev[%p]: Illegal ZERO value for queue"
1190                         "_depth\n", dev);
1191                 return -1;
1192         }
1193
1194         if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1195                 if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) {
1196                         printk(KERN_ERR "dev[%p]: Passed queue_depth: %u"
1197                                 " exceeds TCM/SE_Device TCQ: %u\n",
1198                                 dev, queue_depth,
1199                                 DEV_ATTRIB(dev)->hw_queue_depth);
1200                         return -1;
1201                 }
1202         } else {
1203                 if (queue_depth > DEV_ATTRIB(dev)->queue_depth) {
1204                         if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) {
1205                                 printk(KERN_ERR "dev[%p]: Passed queue_depth:"
1206                                         " %u exceeds TCM/SE_Device MAX"
1207                                         " TCQ: %u\n", dev, queue_depth,
1208                                         DEV_ATTRIB(dev)->hw_queue_depth);
1209                                 return -1;
1210                         }
1211                 }
1212         }
1213
1214         DEV_ATTRIB(dev)->queue_depth = dev->queue_depth = queue_depth;
1215         if (queue_depth > orig_queue_depth)
1216                 atomic_add(queue_depth - orig_queue_depth, &dev->depth_left);
1217         else if (queue_depth < orig_queue_depth)
1218                 atomic_sub(orig_queue_depth - queue_depth, &dev->depth_left);
1219
1220         printk(KERN_INFO "dev[%p]: SE Device TCQ Depth changed to: %u\n",
1221                         dev, queue_depth);
1222         return 0;
1223 }
1224
1225 int se_dev_set_max_sectors(struct se_device *dev, u32 max_sectors)
1226 {
1227         int force = 0; /* Force setting for VDEVS */
1228
1229         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1230                 printk(KERN_ERR "dev[%p]: Unable to change SE Device"
1231                         " max_sectors while dev_export_obj: %d count exists\n",
1232                         dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1233                 return -1;
1234         }
1235         if (!(max_sectors)) {
1236                 printk(KERN_ERR "dev[%p]: Illegal ZERO value for"
1237                         " max_sectors\n", dev);
1238                 return -1;
1239         }
1240         if (max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
1241                 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u less than"
1242                         " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, max_sectors,
1243                                 DA_STATUS_MAX_SECTORS_MIN);
1244                 return -1;
1245         }
1246         if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1247                 if (max_sectors > DEV_ATTRIB(dev)->hw_max_sectors) {
1248                         printk(KERN_ERR "dev[%p]: Passed max_sectors: %u"
1249                                 " greater than TCM/SE_Device max_sectors:"
1250                                 " %u\n", dev, max_sectors,
1251                                 DEV_ATTRIB(dev)->hw_max_sectors);
1252                          return -1;
1253                 }
1254         } else {
1255                 if (!(force) && (max_sectors >
1256                                  DEV_ATTRIB(dev)->hw_max_sectors)) {
1257                         printk(KERN_ERR "dev[%p]: Passed max_sectors: %u"
1258                                 " greater than TCM/SE_Device max_sectors"
1259                                 ": %u, use force=1 to override.\n", dev,
1260                                 max_sectors, DEV_ATTRIB(dev)->hw_max_sectors);
1261                         return -1;
1262                 }
1263                 if (max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
1264                         printk(KERN_ERR "dev[%p]: Passed max_sectors: %u"
1265                                 " greater than DA_STATUS_MAX_SECTORS_MAX:"
1266                                 " %u\n", dev, max_sectors,
1267                                 DA_STATUS_MAX_SECTORS_MAX);
1268                         return -1;
1269                 }
1270         }
1271
1272         DEV_ATTRIB(dev)->max_sectors = max_sectors;
1273         printk("dev[%p]: SE Device max_sectors changed to %u\n",
1274                         dev, max_sectors);
1275         return 0;
1276 }
1277
1278 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
1279 {
1280         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1281                 printk(KERN_ERR "dev[%p]: Unable to change SE Device"
1282                         " optimal_sectors while dev_export_obj: %d count exists\n",
1283                         dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1284                 return -EINVAL;
1285         }
1286         if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1287                 printk(KERN_ERR "dev[%p]: Passed optimal_sectors cannot be"
1288                                 " changed for TCM/pSCSI\n", dev);
1289                 return -EINVAL;
1290         }
1291         if (optimal_sectors > DEV_ATTRIB(dev)->max_sectors) {
1292                 printk(KERN_ERR "dev[%p]: Passed optimal_sectors %u cannot be"
1293                         " greater than max_sectors: %u\n", dev,
1294                         optimal_sectors, DEV_ATTRIB(dev)->max_sectors);
1295                 return -EINVAL;
1296         }
1297
1298         DEV_ATTRIB(dev)->optimal_sectors = optimal_sectors;
1299         printk(KERN_INFO "dev[%p]: SE Device optimal_sectors changed to %u\n",
1300                         dev, optimal_sectors);
1301         return 0;
1302 }
1303
1304 int se_dev_set_block_size(struct se_device *dev, u32 block_size)
1305 {
1306         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1307                 printk(KERN_ERR "dev[%p]: Unable to change SE Device block_size"
1308                         " while dev_export_obj: %d count exists\n", dev,
1309                         atomic_read(&dev->dev_export_obj.obj_access_count));
1310                 return -1;
1311         }
1312
1313         if ((block_size != 512) &&
1314             (block_size != 1024) &&
1315             (block_size != 2048) &&
1316             (block_size != 4096)) {
1317                 printk(KERN_ERR "dev[%p]: Illegal value for block_device: %u"
1318                         " for SE device, must be 512, 1024, 2048 or 4096\n",
1319                         dev, block_size);
1320                 return -1;
1321         }
1322
1323         if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1324                 printk(KERN_ERR "dev[%p]: Not allowed to change block_size for"
1325                         " Physical Device, use for Linux/SCSI to change"
1326                         " block_size for underlying hardware\n", dev);
1327                 return -1;
1328         }
1329
1330         DEV_ATTRIB(dev)->block_size = block_size;
1331         printk(KERN_INFO "dev[%p]: SE Device block_size changed to %u\n",
1332                         dev, block_size);
1333         return 0;
1334 }
1335
1336 struct se_lun *core_dev_add_lun(
1337         struct se_portal_group *tpg,
1338         struct se_hba *hba,
1339         struct se_device *dev,
1340         u32 lun)
1341 {
1342         struct se_lun *lun_p;
1343         u32 lun_access = 0;
1344
1345         if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) {
1346                 printk(KERN_ERR "Unable to export struct se_device while dev_access_obj: %d\n",
1347                         atomic_read(&dev->dev_access_obj.obj_access_count));
1348                 return NULL;
1349         }
1350
1351         lun_p = core_tpg_pre_addlun(tpg, lun);
1352         if ((IS_ERR(lun_p)) || !(lun_p))
1353                 return NULL;
1354
1355         if (dev->dev_flags & DF_READ_ONLY)
1356                 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1357         else
1358                 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
1359
1360         if (core_tpg_post_addlun(tpg, lun_p, lun_access, dev) < 0)
1361                 return NULL;
1362
1363         printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
1364                 " CORE HBA: %u\n", TPG_TFO(tpg)->get_fabric_name(),
1365                 TPG_TFO(tpg)->tpg_get_tag(tpg), lun_p->unpacked_lun,
1366                 TPG_TFO(tpg)->get_fabric_name(), hba->hba_id);
1367         /*
1368          * Update LUN maps for dynamically added initiators when
1369          * generate_node_acl is enabled.
1370          */
1371         if (TPG_TFO(tpg)->tpg_check_demo_mode(tpg)) {
1372                 struct se_node_acl *acl;
1373                 spin_lock_bh(&tpg->acl_node_lock);
1374                 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
1375                         if (acl->dynamic_node_acl) {
1376                                 spin_unlock_bh(&tpg->acl_node_lock);
1377                                 core_tpg_add_node_to_devs(acl, tpg);
1378                                 spin_lock_bh(&tpg->acl_node_lock);
1379                         }
1380                 }
1381                 spin_unlock_bh(&tpg->acl_node_lock);
1382         }
1383
1384         return lun_p;
1385 }
1386
1387 /*      core_dev_del_lun():
1388  *
1389  *
1390  */
1391 int core_dev_del_lun(
1392         struct se_portal_group *tpg,
1393         u32 unpacked_lun)
1394 {
1395         struct se_lun *lun;
1396         int ret = 0;
1397
1398         lun = core_tpg_pre_dellun(tpg, unpacked_lun, &ret);
1399         if (!(lun))
1400                 return ret;
1401
1402         core_tpg_post_dellun(tpg, lun);
1403
1404         printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from"
1405                 " device object\n", TPG_TFO(tpg)->get_fabric_name(),
1406                 TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun,
1407                 TPG_TFO(tpg)->get_fabric_name());
1408
1409         return 0;
1410 }
1411
1412 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
1413 {
1414         struct se_lun *lun;
1415
1416         spin_lock(&tpg->tpg_lun_lock);
1417         if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1418                 printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
1419                         "_PER_TPG-1: %u for Target Portal Group: %hu\n",
1420                         TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
1421                         TRANSPORT_MAX_LUNS_PER_TPG-1,
1422                         TPG_TFO(tpg)->tpg_get_tag(tpg));
1423                 spin_unlock(&tpg->tpg_lun_lock);
1424                 return NULL;
1425         }
1426         lun = &tpg->tpg_lun_list[unpacked_lun];
1427
1428         if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
1429                 printk(KERN_ERR "%s Logical Unit Number: %u is not free on"
1430                         " Target Portal Group: %hu, ignoring request.\n",
1431                         TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
1432                         TPG_TFO(tpg)->tpg_get_tag(tpg));
1433                 spin_unlock(&tpg->tpg_lun_lock);
1434                 return NULL;
1435         }
1436         spin_unlock(&tpg->tpg_lun_lock);
1437
1438         return lun;
1439 }
1440
1441 /*      core_dev_get_lun():
1442  *
1443  *
1444  */
1445 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
1446 {
1447         struct se_lun *lun;
1448
1449         spin_lock(&tpg->tpg_lun_lock);
1450         if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1451                 printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
1452                         "_TPG-1: %u for Target Portal Group: %hu\n",
1453                         TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
1454                         TRANSPORT_MAX_LUNS_PER_TPG-1,
1455                         TPG_TFO(tpg)->tpg_get_tag(tpg));
1456                 spin_unlock(&tpg->tpg_lun_lock);
1457                 return NULL;
1458         }
1459         lun = &tpg->tpg_lun_list[unpacked_lun];
1460
1461         if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
1462                 printk(KERN_ERR "%s Logical Unit Number: %u is not active on"
1463                         " Target Portal Group: %hu, ignoring request.\n",
1464                         TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
1465                         TPG_TFO(tpg)->tpg_get_tag(tpg));
1466                 spin_unlock(&tpg->tpg_lun_lock);
1467                 return NULL;
1468         }
1469         spin_unlock(&tpg->tpg_lun_lock);
1470
1471         return lun;
1472 }
1473
1474 struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
1475         struct se_portal_group *tpg,
1476         u32 mapped_lun,
1477         char *initiatorname,
1478         int *ret)
1479 {
1480         struct se_lun_acl *lacl;
1481         struct se_node_acl *nacl;
1482
1483         if (strlen(initiatorname) > TRANSPORT_IQN_LEN) {
1484                 printk(KERN_ERR "%s InitiatorName exceeds maximum size.\n",
1485                         TPG_TFO(tpg)->get_fabric_name());
1486                 *ret = -EOVERFLOW;
1487                 return NULL;
1488         }
1489         nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
1490         if (!(nacl)) {
1491                 *ret = -EINVAL;
1492                 return NULL;
1493         }
1494         lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
1495         if (!(lacl)) {
1496                 printk(KERN_ERR "Unable to allocate memory for struct se_lun_acl.\n");
1497                 *ret = -ENOMEM;
1498                 return NULL;
1499         }
1500
1501         INIT_LIST_HEAD(&lacl->lacl_list);
1502         lacl->mapped_lun = mapped_lun;
1503         lacl->se_lun_nacl = nacl;
1504         snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
1505
1506         return lacl;
1507 }
1508
1509 int core_dev_add_initiator_node_lun_acl(
1510         struct se_portal_group *tpg,
1511         struct se_lun_acl *lacl,
1512         u32 unpacked_lun,
1513         u32 lun_access)
1514 {
1515         struct se_lun *lun;
1516         struct se_node_acl *nacl;
1517
1518         lun = core_dev_get_lun(tpg, unpacked_lun);
1519         if (!(lun)) {
1520                 printk(KERN_ERR "%s Logical Unit Number: %u is not active on"
1521                         " Target Portal Group: %hu, ignoring request.\n",
1522                         TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
1523                         TPG_TFO(tpg)->tpg_get_tag(tpg));
1524                 return -EINVAL;
1525         }
1526
1527         nacl = lacl->se_lun_nacl;
1528         if (!(nacl))
1529                 return -EINVAL;
1530
1531         if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
1532             (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
1533                 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1534
1535         lacl->se_lun = lun;
1536
1537         if (core_update_device_list_for_node(lun, lacl, lacl->mapped_lun,
1538                         lun_access, nacl, tpg, 1) < 0)
1539                 return -EINVAL;
1540
1541         spin_lock(&lun->lun_acl_lock);
1542         list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
1543         atomic_inc(&lun->lun_acl_count);
1544         smp_mb__after_atomic_inc();
1545         spin_unlock(&lun->lun_acl_lock);
1546
1547         printk(KERN_INFO "%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
1548                 " InitiatorNode: %s\n", TPG_TFO(tpg)->get_fabric_name(),
1549                 TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
1550                 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
1551                 lacl->initiatorname);
1552         /*
1553          * Check to see if there are any existing persistent reservation APTPL
1554          * pre-registrations that need to be enabled for this LUN ACL..
1555          */
1556         core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl);
1557         return 0;
1558 }
1559
1560 /*      core_dev_del_initiator_node_lun_acl():
1561  *
1562  *
1563  */
1564 int core_dev_del_initiator_node_lun_acl(
1565         struct se_portal_group *tpg,
1566         struct se_lun *lun,
1567         struct se_lun_acl *lacl)
1568 {
1569         struct se_node_acl *nacl;
1570
1571         nacl = lacl->se_lun_nacl;
1572         if (!(nacl))
1573                 return -EINVAL;
1574
1575         spin_lock(&lun->lun_acl_lock);
1576         list_del(&lacl->lacl_list);
1577         atomic_dec(&lun->lun_acl_count);
1578         smp_mb__after_atomic_dec();
1579         spin_unlock(&lun->lun_acl_lock);
1580
1581         core_update_device_list_for_node(lun, NULL, lacl->mapped_lun,
1582                 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
1583
1584         lacl->se_lun = NULL;
1585
1586         printk(KERN_INFO "%s_TPG[%hu]_LUN[%u] - Removed ACL for"
1587                 " InitiatorNode: %s Mapped LUN: %u\n",
1588                 TPG_TFO(tpg)->get_fabric_name(),
1589                 TPG_TFO(tpg)->tpg_get_tag(tpg), lun->unpacked_lun,
1590                 lacl->initiatorname, lacl->mapped_lun);
1591
1592         return 0;
1593 }
1594
1595 void core_dev_free_initiator_node_lun_acl(
1596         struct se_portal_group *tpg,
1597         struct se_lun_acl *lacl)
1598 {
1599         printk("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
1600                 " Mapped LUN: %u\n", TPG_TFO(tpg)->get_fabric_name(),
1601                 TPG_TFO(tpg)->tpg_get_tag(tpg),
1602                 TPG_TFO(tpg)->get_fabric_name(),
1603                 lacl->initiatorname, lacl->mapped_lun);
1604
1605         kfree(lacl);
1606 }
1607
1608 int core_dev_setup_virtual_lun0(void)
1609 {
1610         struct se_hba *hba;
1611         struct se_device *dev;
1612         struct se_subsystem_dev *se_dev = NULL;
1613         struct se_subsystem_api *t;
1614         char buf[16];
1615         int ret;
1616
1617         hba = core_alloc_hba("rd_dr", 0, HBA_FLAGS_INTERNAL_USE);
1618         if (IS_ERR(hba))
1619                 return PTR_ERR(hba);
1620
1621         se_global->g_lun0_hba = hba;
1622         t = hba->transport;
1623
1624         se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
1625         if (!(se_dev)) {
1626                 printk(KERN_ERR "Unable to allocate memory for"
1627                                 " struct se_subsystem_dev\n");
1628                 ret = -ENOMEM;
1629                 goto out;
1630         }
1631         INIT_LIST_HEAD(&se_dev->g_se_dev_list);
1632         INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
1633         spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
1634         INIT_LIST_HEAD(&se_dev->t10_reservation.registration_list);
1635         INIT_LIST_HEAD(&se_dev->t10_reservation.aptpl_reg_list);
1636         spin_lock_init(&se_dev->t10_reservation.registration_lock);
1637         spin_lock_init(&se_dev->t10_reservation.aptpl_reg_lock);
1638         INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
1639         spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
1640         spin_lock_init(&se_dev->se_dev_lock);
1641         se_dev->t10_reservation.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
1642         se_dev->t10_wwn.t10_sub_dev = se_dev;
1643         se_dev->t10_alua.t10_sub_dev = se_dev;
1644         se_dev->se_dev_attrib.da_sub_dev = se_dev;
1645         se_dev->se_dev_hba = hba;
1646
1647         se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0");
1648         if (!(se_dev->se_dev_su_ptr)) {
1649                 printk(KERN_ERR "Unable to locate subsystem dependent pointer"
1650                         " from allocate_virtdevice()\n");
1651                 ret = -ENOMEM;
1652                 goto out;
1653         }
1654         se_global->g_lun0_su_dev = se_dev;
1655
1656         memset(buf, 0, 16);
1657         sprintf(buf, "rd_pages=8");
1658         t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf));
1659
1660         dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1661         if (!(dev) || IS_ERR(dev)) {
1662                 ret = -ENOMEM;
1663                 goto out;
1664         }
1665         se_dev->se_dev_ptr = dev;
1666         se_global->g_lun0_dev = dev;
1667
1668         return 0;
1669 out:
1670         se_global->g_lun0_su_dev = NULL;
1671         kfree(se_dev);
1672         if (se_global->g_lun0_hba) {
1673                 core_delete_hba(se_global->g_lun0_hba);
1674                 se_global->g_lun0_hba = NULL;
1675         }
1676         return ret;
1677 }
1678
1679
1680 void core_dev_release_virtual_lun0(void)
1681 {
1682         struct se_hba *hba = se_global->g_lun0_hba;
1683         struct se_subsystem_dev *su_dev = se_global->g_lun0_su_dev;
1684
1685         if (!(hba))
1686                 return;
1687
1688         if (se_global->g_lun0_dev)
1689                 se_free_virtual_device(se_global->g_lun0_dev, hba);
1690
1691         kfree(su_dev);
1692         core_delete_hba(hba);
1693 }