Pileus Git - ~andy/linux/blob - 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 TCM 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/kthread.h>
  37 #include <linux/in.h>
  38 #include <linux/export.h>
  39 #include <net/sock.h>
  40 #include <net/tcp.h>
  41 #include <scsi/scsi.h>
  42 #include <scsi/scsi_device.h>
  43
  44 #include <target/target_core_base.h>
  45 #include <target/target_core_backend.h>
  46 #include <target/target_core_fabric.h>
  47
  48 #include "target_core_internal.h"
  49 #include "target_core_alua.h"
  50 #include "target_core_pr.h"
  51 #include "target_core_ua.h"
  52
  53 static void se_dev_start(struct se_device *dev);
  54 static void se_dev_stop(struct se_device *dev);
  55
  56 static struct se_hba *lun0_hba;
  57 static struct se_subsystem_dev *lun0_su_dev;
  58 /* not static, needed by tpg.c */
  59 struct se_device *g_lun0_dev;
  60
  61 int transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
  62 {
  63         struct se_lun *se_lun = NULL;
  64         struct se_session *se_sess = se_cmd->se_sess;
  65         struct se_device *dev;
  66         unsigned long flags;
  67
  68         if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) {
  69                 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
  70                 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
  71                 return -ENODEV;
  72         }
  73
  74         spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
  75         se_cmd->se_deve = &se_sess->se_node_acl->device_list[unpacked_lun];
  76         if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
  77                 struct se_dev_entry *deve = se_cmd->se_deve;
  78
  79                 deve->total_cmds++;
  80                 deve->total_bytes += se_cmd->data_length;
  81
  82                 if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
  83                     (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) {
  84                         se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
  85                         se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
  86                         pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
  87                                 " Access for 0x%08x\n",
  88                                 se_cmd->se_tfo->get_fabric_name(),
  89                                 unpacked_lun);
  90                         spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
  91                         return -EACCES;
  92                 }
  93
  94                 if (se_cmd->data_direction == DMA_TO_DEVICE)
  95                         deve->write_bytes += se_cmd->data_length;
  96                 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
  97                         deve->read_bytes += se_cmd->data_length;
  98
  99                 deve->deve_cmds++;
 100
 101                 se_lun = deve->se_lun;
 102                 se_cmd->se_lun = deve->se_lun;
 103                 se_cmd->pr_res_key = deve->pr_res_key;
 104                 se_cmd->orig_fe_lun = unpacked_lun;
 105                 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
 106         }
 107         spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
 108
 109         if (!se_lun) {
 110                 /*
 111                  * Use the se_portal_group->tpg_virt_lun0 to allow for
 112                  * REPORT_LUNS, et al to be returned when no active
 113                  * MappedLUN=0 exists for this Initiator Port.
 114                  */
 115                 if (unpacked_lun != 0) {
 116                         se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
 117                         se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 118                         pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
 119                                 " Access for 0x%08x\n",
 120                                 se_cmd->se_tfo->get_fabric_name(),
 121                                 unpacked_lun);
 122                         return -ENODEV;
 123                 }
 124                 /*
 125                  * Force WRITE PROTECT for virtual LUN 0
 126                  */
 127                 if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
 128                     (se_cmd->data_direction != DMA_NONE)) {
 129                         se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
 130                         se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 131                         return -EACCES;
 132                 }
 133
 134                 se_lun = &se_sess->se_tpg->tpg_virt_lun0;
 135                 se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0;
 136                 se_cmd->orig_fe_lun = 0;
 137                 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
 138         }
 139         /*
 140          * Determine if the struct se_lun is online.
 141          * FIXME: Check for LUN_RESET + UNIT Attention
 142          */
 143         if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
 144                 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
 145                 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 146                 return -ENODEV;
 147         }
 148
 149         /* Directly associate cmd with se_dev */
 150         se_cmd->se_dev = se_lun->lun_se_dev;
 151
 152         /* TODO: get rid of this and use atomics for stats */
 153         dev = se_lun->lun_se_dev;
 154         spin_lock_irqsave(&dev->stats_lock, flags);
 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_irqrestore(&dev->stats_lock, flags);
 161
 162         spin_lock_irqsave(&se_lun->lun_cmd_lock, flags);
 163         list_add_tail(&se_cmd->se_lun_node, &se_lun->lun_cmd_list);
 164         spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags);
 165
 166         return 0;
 167 }
 168 EXPORT_SYMBOL(transport_lookup_cmd_lun);
 169
 170 int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
 171 {
 172         struct se_dev_entry *deve;
 173         struct se_lun *se_lun = NULL;
 174         struct se_session *se_sess = se_cmd->se_sess;
 175         struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
 176         unsigned long flags;
 177
 178         if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) {
 179                 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
 180                 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 181                 return -ENODEV;
 182         }
 183
 184         spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
 185         se_cmd->se_deve = &se_sess->se_node_acl->device_list[unpacked_lun];
 186         deve = se_cmd->se_deve;
 187
 188         if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
 189                 se_tmr->tmr_lun = deve->se_lun;
 190                 se_cmd->se_lun = deve->se_lun;
 191                 se_lun = deve->se_lun;
 192                 se_cmd->pr_res_key = deve->pr_res_key;
 193                 se_cmd->orig_fe_lun = unpacked_lun;
 194         }
 195         spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
 196
 197         if (!se_lun) {
 198                 pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
 199                         " Access for 0x%08x\n",
 200                         se_cmd->se_tfo->get_fabric_name(),
 201                         unpacked_lun);
 202                 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 203                 return -ENODEV;
 204         }
 205         /*
 206          * Determine if the struct se_lun is online.
 207          * FIXME: Check for LUN_RESET + UNIT Attention
 208          */
 209         if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
 210                 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 211                 return -ENODEV;
 212         }
 213
 214         /* Directly associate cmd with se_dev */
 215         se_cmd->se_dev = se_lun->lun_se_dev;
 216         se_tmr->tmr_dev = se_lun->lun_se_dev;
 217
 218         spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags);
 219         list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list);
 220         spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags);
 221
 222         return 0;
 223 }
 224 EXPORT_SYMBOL(transport_lookup_tmr_lun);
 225
 226 /*
 227  * This function is called from core_scsi3_emulate_pro_register_and_move()
 228  * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count
 229  * when a matching rtpi is found.
 230  */
 231 struct se_dev_entry *core_get_se_deve_from_rtpi(
 232         struct se_node_acl *nacl,
 233         u16 rtpi)
 234 {
 235         struct se_dev_entry *deve;
 236         struct se_lun *lun;
 237         struct se_port *port;
 238         struct se_portal_group *tpg = nacl->se_tpg;
 239         u32 i;
 240
 241         spin_lock_irq(&nacl->device_list_lock);
 242         for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
 243                 deve = &nacl->device_list[i];
 244
 245                 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
 246                         continue;
 247
 248                 lun = deve->se_lun;
 249                 if (!lun) {
 250                         pr_err("%s device entries device pointer is"
 251                                 " NULL, but Initiator has access.\n",
 252                                 tpg->se_tpg_tfo->get_fabric_name());
 253                         continue;
 254                 }
 255                 port = lun->lun_sep;
 256                 if (!port) {
 257                         pr_err("%s device entries device pointer is"
 258                                 " NULL, but Initiator has access.\n",
 259                                 tpg->se_tpg_tfo->get_fabric_name());
 260                         continue;
 261                 }
 262                 if (port->sep_rtpi != rtpi)
 263                         continue;
 264
 265                 atomic_inc(&deve->pr_ref_count);
 266                 smp_mb__after_atomic_inc();
 267                 spin_unlock_irq(&nacl->device_list_lock);
 268
 269                 return deve;
 270         }
 271         spin_unlock_irq(&nacl->device_list_lock);
 272
 273         return NULL;
 274 }
 275
 276 int core_free_device_list_for_node(
 277         struct se_node_acl *nacl,
 278         struct se_portal_group *tpg)
 279 {
 280         struct se_dev_entry *deve;
 281         struct se_lun *lun;
 282         u32 i;
 283
 284         if (!nacl->device_list)
 285                 return 0;
 286
 287         spin_lock_irq(&nacl->device_list_lock);
 288         for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
 289                 deve = &nacl->device_list[i];
 290
 291                 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
 292                         continue;
 293
 294                 if (!deve->se_lun) {
 295                         pr_err("%s device entries device pointer is"
 296                                 " NULL, but Initiator has access.\n",
 297                                 tpg->se_tpg_tfo->get_fabric_name());
 298                         continue;
 299                 }
 300                 lun = deve->se_lun;
 301
 302                 spin_unlock_irq(&nacl->device_list_lock);
 303                 core_update_device_list_for_node(lun, NULL, deve->mapped_lun,
 304                         TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
 305                 spin_lock_irq(&nacl->device_list_lock);
 306         }
 307         spin_unlock_irq(&nacl->device_list_lock);
 308
 309         kfree(nacl->device_list);
 310         nacl->device_list = NULL;
 311
 312         return 0;
 313 }
 314
 315 void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd)
 316 {
 317         struct se_dev_entry *deve;
 318         unsigned long flags;
 319
 320         spin_lock_irqsave(&se_nacl->device_list_lock, flags);
 321         deve = &se_nacl->device_list[se_cmd->orig_fe_lun];
 322         deve->deve_cmds--;
 323         spin_unlock_irqrestore(&se_nacl->device_list_lock, flags);
 324 }
 325
 326 void core_update_device_list_access(
 327         u32 mapped_lun,
 328         u32 lun_access,
 329         struct se_node_acl *nacl)
 330 {
 331         struct se_dev_entry *deve;
 332
 333         spin_lock_irq(&nacl->device_list_lock);
 334         deve = &nacl->device_list[mapped_lun];
 335         if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
 336                 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
 337                 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
 338         } else {
 339                 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
 340                 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
 341         }
 342         spin_unlock_irq(&nacl->device_list_lock);
 343 }
 344
 345 /*      core_update_device_list_for_node():
 346  *
 347  *
 348  */
 349 int core_update_device_list_for_node(
 350         struct se_lun *lun,
 351         struct se_lun_acl *lun_acl,
 352         u32 mapped_lun,
 353         u32 lun_access,
 354         struct se_node_acl *nacl,
 355         struct se_portal_group *tpg,
 356         int enable)
 357 {
 358         struct se_port *port = lun->lun_sep;
 359         struct se_dev_entry *deve = &nacl->device_list[mapped_lun];
 360         int trans = 0;
 361         /*
 362          * If the MappedLUN entry is being disabled, the entry in
 363          * port->sep_alua_list must be removed now before clearing the
 364          * struct se_dev_entry pointers below as logic in
 365          * core_alua_do_transition_tg_pt() depends on these being present.
 366          */
 367         if (!enable) {
 368                 /*
 369                  * deve->se_lun_acl will be NULL for demo-mode created LUNs
 370                  * that have not been explicitly concerted to MappedLUNs ->
 371                  * struct se_lun_acl, but we remove deve->alua_port_list from
 372                  * port->sep_alua_list. This also means that active UAs and
 373                  * NodeACL context specific PR metadata for demo-mode
 374                  * MappedLUN *deve will be released below..
 375                  */
 376                 spin_lock_bh(&port->sep_alua_lock);
 377                 list_del(&deve->alua_port_list);
 378                 spin_unlock_bh(&port->sep_alua_lock);
 379         }
 380
 381         spin_lock_irq(&nacl->device_list_lock);
 382         if (enable) {
 383                 /*
 384                  * Check if the call is handling demo mode -> explict LUN ACL
 385                  * transition.  This transition must be for the same struct se_lun
 386                  * + mapped_lun that was setup in demo mode..
 387                  */
 388                 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
 389                         if (deve->se_lun_acl != NULL) {
 390                                 pr_err("struct se_dev_entry->se_lun_acl"
 391                                         " already set for demo mode -> explict"
 392                                         " LUN ACL transition\n");
 393                                 spin_unlock_irq(&nacl->device_list_lock);
 394                                 return -EINVAL;
 395                         }
 396                         if (deve->se_lun != lun) {
 397                                 pr_err("struct se_dev_entry->se_lun does"
 398                                         " match passed struct se_lun for demo mode"
 399                                         " -> explict LUN ACL transition\n");
 400                                 spin_unlock_irq(&nacl->device_list_lock);
 401                                 return -EINVAL;
 402                         }
 403                         deve->se_lun_acl = lun_acl;
 404                         trans = 1;
 405                 } else {
 406                         deve->se_lun = lun;
 407                         deve->se_lun_acl = lun_acl;
 408                         deve->mapped_lun = mapped_lun;
 409                         deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS;
 410                 }
 411
 412                 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
 413                         deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
 414                         deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
 415                 } else {
 416                         deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
 417                         deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
 418                 }
 419
 420                 if (trans) {
 421                         spin_unlock_irq(&nacl->device_list_lock);
 422                         return 0;
 423                 }
 424                 deve->creation_time = get_jiffies_64();
 425                 deve->attach_count++;
 426                 spin_unlock_irq(&nacl->device_list_lock);
 427
 428                 spin_lock_bh(&port->sep_alua_lock);
 429                 list_add_tail(&deve->alua_port_list, &port->sep_alua_list);
 430                 spin_unlock_bh(&port->sep_alua_lock);
 431
 432                 return 0;
 433         }
 434         /*
 435          * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
 436          * PR operation to complete.
 437          */
 438         spin_unlock_irq(&nacl->device_list_lock);
 439         while (atomic_read(&deve->pr_ref_count) != 0)
 440                 cpu_relax();
 441         spin_lock_irq(&nacl->device_list_lock);
 442         /*
 443          * Disable struct se_dev_entry LUN ACL mapping
 444          */
 445         core_scsi3_ua_release_all(deve);
 446         deve->se_lun = NULL;
 447         deve->se_lun_acl = NULL;
 448         deve->lun_flags = 0;
 449         deve->creation_time = 0;
 450         deve->attach_count--;
 451         spin_unlock_irq(&nacl->device_list_lock);
 452
 453         core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl);
 454         return 0;
 455 }
 456
 457 /*      core_clear_lun_from_tpg():
 458  *
 459  *
 460  */
 461 void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
 462 {
 463         struct se_node_acl *nacl;
 464         struct se_dev_entry *deve;
 465         u32 i;
 466
 467         spin_lock_irq(&tpg->acl_node_lock);
 468         list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
 469                 spin_unlock_irq(&tpg->acl_node_lock);
 470
 471                 spin_lock_irq(&nacl->device_list_lock);
 472                 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
 473                         deve = &nacl->device_list[i];
 474                         if (lun != deve->se_lun)
 475                                 continue;
 476                         spin_unlock_irq(&nacl->device_list_lock);
 477
 478                         core_update_device_list_for_node(lun, NULL,
 479                                 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS,
 480                                 nacl, tpg, 0);
 481
 482                         spin_lock_irq(&nacl->device_list_lock);
 483                 }
 484                 spin_unlock_irq(&nacl->device_list_lock);
 485
 486                 spin_lock_irq(&tpg->acl_node_lock);
 487         }
 488         spin_unlock_irq(&tpg->acl_node_lock);
 489 }
 490
 491 static struct se_port *core_alloc_port(struct se_device *dev)
 492 {
 493         struct se_port *port, *port_tmp;
 494
 495         port = kzalloc(sizeof(struct se_port), GFP_KERNEL);
 496         if (!port) {
 497                 pr_err("Unable to allocate struct se_port\n");
 498                 return ERR_PTR(-ENOMEM);
 499         }
 500         INIT_LIST_HEAD(&port->sep_alua_list);
 501         INIT_LIST_HEAD(&port->sep_list);
 502         atomic_set(&port->sep_tg_pt_secondary_offline, 0);
 503         spin_lock_init(&port->sep_alua_lock);
 504         mutex_init(&port->sep_tg_pt_md_mutex);
 505
 506         spin_lock(&dev->se_port_lock);
 507         if (dev->dev_port_count == 0x0000ffff) {
 508                 pr_warn("Reached dev->dev_port_count =="
 509                                 " 0x0000ffff\n");
 510                 spin_unlock(&dev->se_port_lock);
 511                 return ERR_PTR(-ENOSPC);
 512         }
 513 again:
 514         /*
 515          * Allocate the next RELATIVE TARGET PORT IDENTIFER for this struct se_device
 516          * Here is the table from spc4r17 section 7.7.3.8.
 517          *
 518          *    Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
 519          *
 520          * Code      Description
 521          * 0h        Reserved
 522          * 1h        Relative port 1, historically known as port A
 523          * 2h        Relative port 2, historically known as port B
 524          * 3h to FFFFh    Relative port 3 through 65 535
 525          */
 526         port->sep_rtpi = dev->dev_rpti_counter++;
 527         if (!port->sep_rtpi)
 528                 goto again;
 529
 530         list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) {
 531                 /*
 532                  * Make sure RELATIVE TARGET PORT IDENTIFER is unique
 533                  * for 16-bit wrap..
 534                  */
 535                 if (port->sep_rtpi == port_tmp->sep_rtpi)
 536                         goto again;
 537         }
 538         spin_unlock(&dev->se_port_lock);
 539
 540         return port;
 541 }
 542
 543 static void core_export_port(
 544         struct se_device *dev,
 545         struct se_portal_group *tpg,
 546         struct se_port *port,
 547         struct se_lun *lun)
 548 {
 549         struct se_subsystem_dev *su_dev = dev->se_sub_dev;
 550         struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL;
 551
 552         spin_lock(&dev->se_port_lock);
 553         spin_lock(&lun->lun_sep_lock);
 554         port->sep_tpg = tpg;
 555         port->sep_lun = lun;
 556         lun->lun_sep = port;
 557         spin_unlock(&lun->lun_sep_lock);
 558
 559         list_add_tail(&port->sep_list, &dev->dev_sep_list);
 560         spin_unlock(&dev->se_port_lock);
 561
 562         if (su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) {
 563                 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port);
 564                 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) {
 565                         pr_err("Unable to allocate t10_alua_tg_pt"
 566                                         "_gp_member_t\n");
 567                         return;
 568                 }
 569                 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
 570                 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
 571                         su_dev->t10_alua.default_tg_pt_gp);
 572                 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
 573                 pr_debug("%s/%s: Adding to default ALUA Target Port"
 574                         " Group: alua/default_tg_pt_gp\n",
 575                         dev->transport->name, tpg->se_tpg_tfo->get_fabric_name());
 576         }
 577
 578         dev->dev_port_count++;
 579         port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFER */
 580 }
 581
 582 /*
 583  *      Called with struct se_device->se_port_lock spinlock held.
 584  */
 585 static void core_release_port(struct se_device *dev, struct se_port *port)
 586         __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock)
 587 {
 588         /*
 589          * Wait for any port reference for PR ALL_TG_PT=1 operation
 590          * to complete in __core_scsi3_alloc_registration()
 591          */
 592         spin_unlock(&dev->se_port_lock);
 593         if (atomic_read(&port->sep_tg_pt_ref_cnt))
 594                 cpu_relax();
 595         spin_lock(&dev->se_port_lock);
 596
 597         core_alua_free_tg_pt_gp_mem(port);
 598
 599         list_del(&port->sep_list);
 600         dev->dev_port_count--;
 601         kfree(port);
 602 }
 603
 604 int core_dev_export(
 605         struct se_device *dev,
 606         struct se_portal_group *tpg,
 607         struct se_lun *lun)
 608 {
 609         struct se_port *port;
 610
 611         port = core_alloc_port(dev);
 612         if (IS_ERR(port))
 613                 return PTR_ERR(port);
 614
 615         lun->lun_se_dev = dev;
 616         se_dev_start(dev);
 617
 618         atomic_inc(&dev->dev_export_obj.obj_access_count);
 619         core_export_port(dev, tpg, port, lun);
 620         return 0;
 621 }
 622
 623 void core_dev_unexport(
 624         struct se_device *dev,
 625         struct se_portal_group *tpg,
 626         struct se_lun *lun)
 627 {
 628         struct se_port *port = lun->lun_sep;
 629
 630         spin_lock(&lun->lun_sep_lock);
 631         if (lun->lun_se_dev == NULL) {
 632                 spin_unlock(&lun->lun_sep_lock);
 633                 return;
 634         }
 635         spin_unlock(&lun->lun_sep_lock);
 636
 637         spin_lock(&dev->se_port_lock);
 638         atomic_dec(&dev->dev_export_obj.obj_access_count);
 639         core_release_port(dev, port);
 640         spin_unlock(&dev->se_port_lock);
 641
 642         se_dev_stop(dev);
 643         lun->lun_se_dev = NULL;
 644 }
 645
 646 int target_report_luns(struct se_task *se_task)
 647 {
 648         struct se_cmd *se_cmd = se_task->task_se_cmd;
 649         struct se_dev_entry *deve;
 650         struct se_lun *se_lun;
 651         struct se_session *se_sess = se_cmd->se_sess;
 652         unsigned char *buf;
 653         u32 cdb_offset = 0, lun_count = 0, offset = 8, i;
 654
 655         buf = (unsigned char *) transport_kmap_data_sg(se_cmd);
 656
 657         /*
 658          * If no struct se_session pointer is present, this struct se_cmd is
 659          * coming via a target_core_mod PASSTHROUGH op, and not through
 660          * a $FABRIC_MOD.  In that case, report LUN=0 only.
 661          */
 662         if (!se_sess) {
 663                 int_to_scsilun(0, (struct scsi_lun *)&buf[offset]);
 664                 lun_count = 1;
 665                 goto done;
 666         }
 667
 668         spin_lock_irq(&se_sess->se_node_acl->device_list_lock);
 669         for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
 670                 deve = &se_sess->se_node_acl->device_list[i];
 671                 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
 672                         continue;
 673                 se_lun = deve->se_lun;
 674                 /*
 675                  * We determine the correct LUN LIST LENGTH even once we
 676                  * have reached the initial allocation length.
 677                  * See SPC2-R20 7.19.
 678                  */
 679                 lun_count++;
 680                 if ((cdb_offset + 8) >= se_cmd->data_length)
 681                         continue;
 682
 683                 int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]);
 684                 offset += 8;
 685                 cdb_offset += 8;
 686         }
 687         spin_unlock_irq(&se_sess->se_node_acl->device_list_lock);
 688
 689         /*
 690          * See SPC3 r07, page 159.
 691          */
 692 done:
 693         transport_kunmap_data_sg(se_cmd);
 694         lun_count *= 8;
 695         buf[0] = ((lun_count >> 24) & 0xff);
 696         buf[1] = ((lun_count >> 16) & 0xff);
 697         buf[2] = ((lun_count >> 8) & 0xff);
 698         buf[3] = (lun_count & 0xff);
 699
 700         se_task->task_scsi_status = GOOD;
 701         transport_complete_task(se_task, 1);
 702         return 0;
 703 }
 704
 705 /*      se_release_device_for_hba():
 706  *
 707  *
 708  */
 709 void se_release_device_for_hba(struct se_device *dev)
 710 {
 711         struct se_hba *hba = dev->se_hba;
 712
 713         if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
 714             (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) ||
 715             (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) ||
 716             (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) ||
 717             (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED))
 718                 se_dev_stop(dev);
 719
 720         if (dev->dev_ptr) {
 721                 kthread_stop(dev->process_thread);
 722                 if (dev->transport->free_device)
 723                         dev->transport->free_device(dev->dev_ptr);
 724         }
 725
 726         spin_lock(&hba->device_lock);
 727         list_del(&dev->dev_list);
 728         hba->dev_count--;
 729         spin_unlock(&hba->device_lock);
 730
 731         core_scsi3_free_all_registrations(dev);
 732         se_release_vpd_for_dev(dev);
 733
 734         kfree(dev);
 735 }
 736
 737 void se_release_vpd_for_dev(struct se_device *dev)
 738 {
 739         struct t10_vpd *vpd, *vpd_tmp;
 740
 741         spin_lock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock);
 742         list_for_each_entry_safe(vpd, vpd_tmp,
 743                         &dev->se_sub_dev->t10_wwn.t10_vpd_list, vpd_list) {
 744                 list_del(&vpd->vpd_list);
 745                 kfree(vpd);
 746         }
 747         spin_unlock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock);
 748 }
 749
 750 /*      se_free_virtual_device():
 751  *
 752  *      Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers.
 753  */
 754 int se_free_virtual_device(struct se_device *dev, struct se_hba *hba)
 755 {
 756         if (!list_empty(&dev->dev_sep_list))
 757                 dump_stack();
 758
 759         core_alua_free_lu_gp_mem(dev);
 760         se_release_device_for_hba(dev);
 761
 762         return 0;
 763 }
 764
 765 static void se_dev_start(struct se_device *dev)
 766 {
 767         struct se_hba *hba = dev->se_hba;
 768
 769         spin_lock(&hba->device_lock);
 770         atomic_inc(&dev->dev_obj.obj_access_count);
 771         if (atomic_read(&dev->dev_obj.obj_access_count) == 1) {
 772                 if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) {
 773                         dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED;
 774                         dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED;
 775                 } else if (dev->dev_status &
 776                            TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) {
 777                         dev->dev_status &=
 778                                 ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
 779                         dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
 780                 }
 781         }
 782         spin_unlock(&hba->device_lock);
 783 }
 784
 785 static void se_dev_stop(struct se_device *dev)
 786 {
 787         struct se_hba *hba = dev->se_hba;
 788
 789         spin_lock(&hba->device_lock);
 790         atomic_dec(&dev->dev_obj.obj_access_count);
 791         if (atomic_read(&dev->dev_obj.obj_access_count) == 0) {
 792                 if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) {
 793                         dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED;
 794                         dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED;
 795                 } else if (dev->dev_status &
 796                            TRANSPORT_DEVICE_OFFLINE_ACTIVATED) {
 797                         dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
 798                         dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
 799                 }
 800         }
 801         spin_unlock(&hba->device_lock);
 802 }
 803
 804 int se_dev_check_online(struct se_device *dev)
 805 {
 806         unsigned long flags;
 807         int ret;
 808
 809         spin_lock_irqsave(&dev->dev_status_lock, flags);
 810         ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
 811                (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1;
 812         spin_unlock_irqrestore(&dev->dev_status_lock, flags);
 813
 814         return ret;
 815 }
 816
 817 int se_dev_check_shutdown(struct se_device *dev)
 818 {
 819         int ret;
 820
 821         spin_lock_irq(&dev->dev_status_lock);
 822         ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN);
 823         spin_unlock_irq(&dev->dev_status_lock);
 824
 825         return ret;
 826 }
 827
 828 u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size)
 829 {
 830         u32 tmp, aligned_max_sectors;
 831         /*
 832          * Limit max_sectors to a PAGE_SIZE aligned value for modern
 833          * transport_allocate_data_tasks() operation.
 834          */
 835         tmp = rounddown((max_sectors * block_size), PAGE_SIZE);
 836         aligned_max_sectors = (tmp / block_size);
 837         if (max_sectors != aligned_max_sectors) {
 838                 printk(KERN_INFO "Rounding down aligned max_sectors from %u"
 839                                 " to %u\n", max_sectors, aligned_max_sectors);
 840                 return aligned_max_sectors;
 841         }
 842
 843         return max_sectors;
 844 }
 845
 846 void se_dev_set_default_attribs(
 847         struct se_device *dev,
 848         struct se_dev_limits *dev_limits)
 849 {
 850         struct queue_limits *limits = &dev_limits->limits;
 851
 852         dev->se_sub_dev->se_dev_attrib.emulate_dpo = DA_EMULATE_DPO;
 853         dev->se_sub_dev->se_dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE;
 854         dev->se_sub_dev->se_dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ;
 855         dev->se_sub_dev->se_dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
 856         dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
 857         dev->se_sub_dev->se_dev_attrib.emulate_tas = DA_EMULATE_TAS;
 858         dev->se_sub_dev->se_dev_attrib.emulate_tpu = DA_EMULATE_TPU;
 859         dev->se_sub_dev->se_dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
 860         dev->se_sub_dev->se_dev_attrib.emulate_reservations = DA_EMULATE_RESERVATIONS;
 861         dev->se_sub_dev->se_dev_attrib.emulate_alua = DA_EMULATE_ALUA;
 862         dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
 863         dev->se_sub_dev->se_dev_attrib.is_nonrot = DA_IS_NONROT;
 864         dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
 865         /*
 866          * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK
 867          * iblock_create_virtdevice() from struct queue_limits values
 868          * if blk_queue_discard()==1
 869          */
 870         dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
 871         dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count =
 872                 DA_MAX_UNMAP_BLOCK_DESC_COUNT;
 873         dev->se_sub_dev->se_dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
 874         dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment =
 875                                 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
 876         /*
 877          * block_size is based on subsystem plugin dependent requirements.
 878          */
 879         dev->se_sub_dev->se_dev_attrib.hw_block_size = limits->logical_block_size;
 880         dev->se_sub_dev->se_dev_attrib.block_size = limits->logical_block_size;
 881         /*
 882          * max_sectors is based on subsystem plugin dependent requirements.
 883          */
 884         dev->se_sub_dev->se_dev_attrib.hw_max_sectors = limits->max_hw_sectors;
 885         /*
 886          * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
 887          */
 888         limits->max_sectors = se_dev_align_max_sectors(limits->max_sectors,
 889                                                 limits->logical_block_size);
 890         dev->se_sub_dev->se_dev_attrib.max_sectors = limits->max_sectors;
 891         /*
 892          * Set optimal_sectors from max_sectors, which can be lowered via
 893          * configfs.
 894          */
 895         dev->se_sub_dev->se_dev_attrib.optimal_sectors = limits->max_sectors;
 896         /*
 897          * queue_depth is based on subsystem plugin dependent requirements.
 898          */
 899         dev->se_sub_dev->se_dev_attrib.hw_queue_depth = dev_limits->hw_queue_depth;
 900         dev->se_sub_dev->se_dev_attrib.queue_depth = dev_limits->queue_depth;
 901 }
 902
 903 int se_dev_set_max_unmap_lba_count(
 904         struct se_device *dev,
 905         u32 max_unmap_lba_count)
 906 {
 907         dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = max_unmap_lba_count;
 908         pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n",
 909                         dev, dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count);
 910         return 0;
 911 }
 912
 913 int se_dev_set_max_unmap_block_desc_count(
 914         struct se_device *dev,
 915         u32 max_unmap_block_desc_count)
 916 {
 917         dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count =
 918                 max_unmap_block_desc_count;
 919         pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n",
 920                         dev, dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count);
 921         return 0;
 922 }
 923
 924 int se_dev_set_unmap_granularity(
 925         struct se_device *dev,
 926         u32 unmap_granularity)
 927 {
 928         dev->se_sub_dev->se_dev_attrib.unmap_granularity = unmap_granularity;
 929         pr_debug("dev[%p]: Set unmap_granularity: %u\n",
 930                         dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity);
 931         return 0;
 932 }
 933
 934 int se_dev_set_unmap_granularity_alignment(
 935         struct se_device *dev,
 936         u32 unmap_granularity_alignment)
 937 {
 938         dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment;
 939         pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n",
 940                         dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment);
 941         return 0;
 942 }
 943
 944 int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
 945 {
 946         if (flag != 0 && flag != 1) {
 947                 pr_err("Illegal value %d\n", flag);
 948                 return -EINVAL;
 949         }
 950
 951         if (flag) {
 952                 pr_err("dpo_emulated not supported\n");
 953                 return -EINVAL;
 954         }
 955
 956         return 0;
 957 }
 958
 959 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
 960 {
 961         if (flag != 0 && flag != 1) {
 962                 pr_err("Illegal value %d\n", flag);
 963                 return -EINVAL;
 964         }
 965
 966         if (flag && dev->transport->fua_write_emulated == 0) {
 967                 pr_err("fua_write_emulated not supported\n");
 968                 return -EINVAL;
 969         }
 970         dev->se_sub_dev->se_dev_attrib.emulate_fua_write = flag;
 971         pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
 972                         dev, dev->se_sub_dev->se_dev_attrib.emulate_fua_write);
 973         return 0;
 974 }
 975
 976 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
 977 {
 978         if (flag != 0 && flag != 1) {
 979                 pr_err("Illegal value %d\n", flag);
 980                 return -EINVAL;
 981         }
 982
 983         if (flag) {
 984                 pr_err("ua read emulated not supported\n");
 985                 return -EINVAL;
 986         }
 987
 988         return 0;
 989 }
 990
 991 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
 992 {
 993         if (flag != 0 && flag != 1) {
 994                 pr_err("Illegal value %d\n", flag);
 995                 return -EINVAL;
 996         }
 997         if (flag && dev->transport->write_cache_emulated == 0) {
 998                 pr_err("write_cache_emulated not supported\n");
 999                 return -EINVAL;
1000         }
1001         dev->se_sub_dev->se_dev_attrib.emulate_write_cache = flag;
1002         pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
1003                         dev, dev->se_sub_dev->se_dev_attrib.emulate_write_cache);
1004         return 0;
1005 }
1006
1007 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
1008 {
1009         if ((flag != 0) && (flag != 1) && (flag != 2)) {
1010                 pr_err("Illegal value %d\n", flag);
1011                 return -EINVAL;
1012         }
1013
1014         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1015                 pr_err("dev[%p]: Unable to change SE Device"
1016                         " UA_INTRLCK_CTRL while dev_export_obj: %d count"
1017                         " exists\n", dev,
1018                         atomic_read(&dev->dev_export_obj.obj_access_count));
1019                 return -EINVAL;
1020         }
1021         dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = flag;
1022         pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
1023                 dev, dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl);
1024
1025         return 0;
1026 }
1027
1028 int se_dev_set_emulate_tas(struct se_device *dev, int flag)
1029 {
1030         if ((flag != 0) && (flag != 1)) {
1031                 pr_err("Illegal value %d\n", flag);
1032                 return -EINVAL;
1033         }
1034
1035         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1036                 pr_err("dev[%p]: Unable to change SE Device TAS while"
1037                         " dev_export_obj: %d count exists\n", dev,
1038                         atomic_read(&dev->dev_export_obj.obj_access_count));
1039                 return -EINVAL;
1040         }
1041         dev->se_sub_dev->se_dev_attrib.emulate_tas = flag;
1042         pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
1043                 dev, (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? "Enabled" : "Disabled");
1044
1045         return 0;
1046 }
1047
1048 int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
1049 {
1050         if ((flag != 0) && (flag != 1)) {
1051                 pr_err("Illegal value %d\n", flag);
1052                 return -EINVAL;
1053         }
1054         /*
1055          * We expect this value to be non-zero when generic Block Layer
1056          * Discard supported is detected iblock_create_virtdevice().
1057          */
1058         if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) {
1059                 pr_err("Generic Block Discard not supported\n");
1060                 return -ENOSYS;
1061         }
1062
1063         dev->se_sub_dev->se_dev_attrib.emulate_tpu = flag;
1064         pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
1065                                 dev, flag);
1066         return 0;
1067 }
1068
1069 int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
1070 {
1071         if ((flag != 0) && (flag != 1)) {
1072                 pr_err("Illegal value %d\n", flag);
1073                 return -EINVAL;
1074         }
1075         /*
1076          * We expect this value to be non-zero when generic Block Layer
1077          * Discard supported is detected iblock_create_virtdevice().
1078          */
1079         if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) {
1080                 pr_err("Generic Block Discard not supported\n");
1081                 return -ENOSYS;
1082         }
1083
1084         dev->se_sub_dev->se_dev_attrib.emulate_tpws = flag;
1085         pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
1086                                 dev, flag);
1087         return 0;
1088 }
1089
1090 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
1091 {
1092         if ((flag != 0) && (flag != 1)) {
1093                 pr_err("Illegal value %d\n", flag);
1094                 return -EINVAL;
1095         }
1096         dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = flag;
1097         pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
1098                 (dev->se_sub_dev->se_dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled");
1099         return 0;
1100 }
1101
1102 int se_dev_set_is_nonrot(struct se_device *dev, int flag)
1103 {
1104         if ((flag != 0) && (flag != 1)) {
1105                 printk(KERN_ERR "Illegal value %d\n", flag);
1106                 return -EINVAL;
1107         }
1108         dev->se_sub_dev->se_dev_attrib.is_nonrot = flag;
1109         pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n",
1110                dev, flag);
1111         return 0;
1112 }
1113
1114 int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag)
1115 {
1116         if (flag != 0) {
1117                 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted"
1118                         " reordering not implemented\n", dev);
1119                 return -ENOSYS;
1120         }
1121         dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = flag;
1122         pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag);
1123         return 0;
1124 }
1125
1126 /*
1127  * Note, this can only be called on unexported SE Device Object.
1128  */
1129 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
1130 {
1131         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1132                 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1133                         " dev_export_obj: %d count exists\n", dev,
1134                         atomic_read(&dev->dev_export_obj.obj_access_count));
1135                 return -EINVAL;
1136         }
1137         if (!queue_depth) {
1138                 pr_err("dev[%p]: Illegal ZERO value for queue"
1139                         "_depth\n", dev);
1140                 return -EINVAL;
1141         }
1142
1143         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1144                 if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) {
1145                         pr_err("dev[%p]: Passed queue_depth: %u"
1146                                 " exceeds TCM/SE_Device TCQ: %u\n",
1147                                 dev, queue_depth,
1148                                 dev->se_sub_dev->se_dev_attrib.hw_queue_depth);
1149                         return -EINVAL;
1150                 }
1151         } else {
1152                 if (queue_depth > dev->se_sub_dev->se_dev_attrib.queue_depth) {
1153                         if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) {
1154                                 pr_err("dev[%p]: Passed queue_depth:"
1155                                         " %u exceeds TCM/SE_Device MAX"
1156                                         " TCQ: %u\n", dev, queue_depth,
1157                                         dev->se_sub_dev->se_dev_attrib.hw_queue_depth);
1158                                 return -EINVAL;
1159                         }
1160                 }
1161         }
1162
1163         dev->se_sub_dev->se_dev_attrib.queue_depth = dev->queue_depth = queue_depth;
1164         pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n",
1165                         dev, queue_depth);
1166         return 0;
1167 }
1168
1169 int se_dev_set_max_sectors(struct se_device *dev, u32 max_sectors)
1170 {
1171         int force = 0; /* Force setting for VDEVS */
1172
1173         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1174                 pr_err("dev[%p]: Unable to change SE Device"
1175                         " max_sectors while dev_export_obj: %d count exists\n",
1176                         dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1177                 return -EINVAL;
1178         }
1179         if (!max_sectors) {
1180                 pr_err("dev[%p]: Illegal ZERO value for"
1181                         " max_sectors\n", dev);
1182                 return -EINVAL;
1183         }
1184         if (max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
1185                 pr_err("dev[%p]: Passed max_sectors: %u less than"
1186                         " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, max_sectors,
1187                                 DA_STATUS_MAX_SECTORS_MIN);
1188                 return -EINVAL;
1189         }
1190         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1191                 if (max_sectors > dev->se_sub_dev->se_dev_attrib.hw_max_sectors) {
1192                         pr_err("dev[%p]: Passed max_sectors: %u"
1193                                 " greater than TCM/SE_Device max_sectors:"
1194                                 " %u\n", dev, max_sectors,
1195                                 dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
1196                          return -EINVAL;
1197                 }
1198         } else {
1199                 if (!force && (max_sectors >
1200                                  dev->se_sub_dev->se_dev_attrib.hw_max_sectors)) {
1201                         pr_err("dev[%p]: Passed max_sectors: %u"
1202                                 " greater than TCM/SE_Device max_sectors"
1203                                 ": %u, use force=1 to override.\n", dev,
1204                                 max_sectors, dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
1205                         return -EINVAL;
1206                 }
1207                 if (max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
1208                         pr_err("dev[%p]: Passed max_sectors: %u"
1209                                 " greater than DA_STATUS_MAX_SECTORS_MAX:"
1210                                 " %u\n", dev, max_sectors,
1211                                 DA_STATUS_MAX_SECTORS_MAX);
1212                         return -EINVAL;
1213                 }
1214         }
1215         /*
1216          * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
1217          */
1218         max_sectors = se_dev_align_max_sectors(max_sectors,
1219                                 dev->se_sub_dev->se_dev_attrib.block_size);
1220
1221         dev->se_sub_dev->se_dev_attrib.max_sectors = max_sectors;
1222         pr_debug("dev[%p]: SE Device max_sectors changed to %u\n",
1223                         dev, max_sectors);
1224         return 0;
1225 }
1226
1227 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
1228 {
1229         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1230                 pr_err("dev[%p]: Unable to change SE Device"
1231                         " optimal_sectors while dev_export_obj: %d count exists\n",
1232                         dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1233                 return -EINVAL;
1234         }
1235         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1236                 pr_err("dev[%p]: Passed optimal_sectors cannot be"
1237                                 " changed for TCM/pSCSI\n", dev);
1238                 return -EINVAL;
1239         }
1240         if (optimal_sectors > dev->se_sub_dev->se_dev_attrib.max_sectors) {
1241                 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1242                         " greater than max_sectors: %u\n", dev,
1243                         optimal_sectors, dev->se_sub_dev->se_dev_attrib.max_sectors);
1244                 return -EINVAL;
1245         }
1246
1247         dev->se_sub_dev->se_dev_attrib.optimal_sectors = optimal_sectors;
1248         pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1249                         dev, optimal_sectors);
1250         return 0;
1251 }
1252
1253 int se_dev_set_block_size(struct se_device *dev, u32 block_size)
1254 {
1255         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1256                 pr_err("dev[%p]: Unable to change SE Device block_size"
1257                         " while dev_export_obj: %d count exists\n", dev,
1258                         atomic_read(&dev->dev_export_obj.obj_access_count));
1259                 return -EINVAL;
1260         }
1261
1262         if ((block_size != 512) &&
1263             (block_size != 1024) &&
1264             (block_size != 2048) &&
1265             (block_size != 4096)) {
1266                 pr_err("dev[%p]: Illegal value for block_device: %u"
1267                         " for SE device, must be 512, 1024, 2048 or 4096\n",
1268                         dev, block_size);
1269                 return -EINVAL;
1270         }
1271
1272         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1273                 pr_err("dev[%p]: Not allowed to change block_size for"
1274                         " Physical Device, use for Linux/SCSI to change"
1275                         " block_size for underlying hardware\n", dev);
1276                 return -EINVAL;
1277         }
1278
1279         dev->se_sub_dev->se_dev_attrib.block_size = block_size;
1280         pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1281                         dev, block_size);
1282         return 0;
1283 }
1284
1285 struct se_lun *core_dev_add_lun(
1286         struct se_portal_group *tpg,
1287         struct se_hba *hba,
1288         struct se_device *dev,
1289         u32 lun)
1290 {
1291         struct se_lun *lun_p;
1292         u32 lun_access = 0;
1293         int rc;
1294
1295         if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) {
1296                 pr_err("Unable to export struct se_device while dev_access_obj: %d\n",
1297                         atomic_read(&dev->dev_access_obj.obj_access_count));
1298                 return ERR_PTR(-EACCES);
1299         }
1300
1301         lun_p = core_tpg_pre_addlun(tpg, lun);
1302         if (IS_ERR(lun_p))
1303                 return lun_p;
1304
1305         if (dev->dev_flags & DF_READ_ONLY)
1306                 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1307         else
1308                 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
1309
1310         rc = core_tpg_post_addlun(tpg, lun_p, lun_access, dev);
1311         if (rc < 0)
1312                 return ERR_PTR(rc);
1313
1314         pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
1315                 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1316                 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun_p->unpacked_lun,
1317                 tpg->se_tpg_tfo->get_fabric_name(), hba->hba_id);
1318         /*
1319          * Update LUN maps for dynamically added initiators when
1320          * generate_node_acl is enabled.
1321          */
1322         if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) {
1323                 struct se_node_acl *acl;
1324                 spin_lock_irq(&tpg->acl_node_lock);
1325                 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
1326                         if (acl->dynamic_node_acl &&
1327                             (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only ||
1328                              !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) {
1329                                 spin_unlock_irq(&tpg->acl_node_lock);
1330                                 core_tpg_add_node_to_devs(acl, tpg);
1331                                 spin_lock_irq(&tpg->acl_node_lock);
1332                         }
1333                 }
1334                 spin_unlock_irq(&tpg->acl_node_lock);
1335         }
1336
1337         return lun_p;
1338 }
1339
1340 /*      core_dev_del_lun():
1341  *
1342  *
1343  */
1344 int core_dev_del_lun(
1345         struct se_portal_group *tpg,
1346         u32 unpacked_lun)
1347 {
1348         struct se_lun *lun;
1349
1350         lun = core_tpg_pre_dellun(tpg, unpacked_lun);
1351         if (IS_ERR(lun))
1352                 return PTR_ERR(lun);
1353
1354         core_tpg_post_dellun(tpg, lun);
1355
1356         pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from"
1357                 " device object\n", tpg->se_tpg_tfo->get_fabric_name(),
1358                 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun,
1359                 tpg->se_tpg_tfo->get_fabric_name());
1360
1361         return 0;
1362 }
1363
1364 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
1365 {
1366         struct se_lun *lun;
1367
1368         spin_lock(&tpg->tpg_lun_lock);
1369         if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1370                 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
1371                         "_PER_TPG-1: %u for Target Portal Group: %hu\n",
1372                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1373                         TRANSPORT_MAX_LUNS_PER_TPG-1,
1374                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
1375                 spin_unlock(&tpg->tpg_lun_lock);
1376                 return NULL;
1377         }
1378         lun = &tpg->tpg_lun_list[unpacked_lun];
1379
1380         if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
1381                 pr_err("%s Logical Unit Number: %u is not free on"
1382                         " Target Portal Group: %hu, ignoring request.\n",
1383                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1384                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
1385                 spin_unlock(&tpg->tpg_lun_lock);
1386                 return NULL;
1387         }
1388         spin_unlock(&tpg->tpg_lun_lock);
1389
1390         return lun;
1391 }
1392
1393 /*      core_dev_get_lun():
1394  *
1395  *
1396  */
1397 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
1398 {
1399         struct se_lun *lun;
1400
1401         spin_lock(&tpg->tpg_lun_lock);
1402         if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1403                 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
1404                         "_TPG-1: %u for Target Portal Group: %hu\n",
1405                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1406                         TRANSPORT_MAX_LUNS_PER_TPG-1,
1407                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
1408                 spin_unlock(&tpg->tpg_lun_lock);
1409                 return NULL;
1410         }
1411         lun = &tpg->tpg_lun_list[unpacked_lun];
1412
1413         if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
1414                 pr_err("%s Logical Unit Number: %u is not active on"
1415                         " Target Portal Group: %hu, ignoring request.\n",
1416                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1417                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
1418                 spin_unlock(&tpg->tpg_lun_lock);
1419                 return NULL;
1420         }
1421         spin_unlock(&tpg->tpg_lun_lock);
1422
1423         return lun;
1424 }
1425
1426 struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
1427         struct se_portal_group *tpg,
1428         u32 mapped_lun,
1429         char *initiatorname,
1430         int *ret)
1431 {
1432         struct se_lun_acl *lacl;
1433         struct se_node_acl *nacl;
1434
1435         if (strlen(initiatorname) >= TRANSPORT_IQN_LEN) {
1436                 pr_err("%s InitiatorName exceeds maximum size.\n",
1437                         tpg->se_tpg_tfo->get_fabric_name());
1438                 *ret = -EOVERFLOW;
1439                 return NULL;
1440         }
1441         nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
1442         if (!nacl) {
1443                 *ret = -EINVAL;
1444                 return NULL;
1445         }
1446         lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
1447         if (!lacl) {
1448                 pr_err("Unable to allocate memory for struct se_lun_acl.\n");
1449                 *ret = -ENOMEM;
1450                 return NULL;
1451         }
1452
1453         INIT_LIST_HEAD(&lacl->lacl_list);
1454         lacl->mapped_lun = mapped_lun;
1455         lacl->se_lun_nacl = nacl;
1456         snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
1457
1458         return lacl;
1459 }
1460
1461 int core_dev_add_initiator_node_lun_acl(
1462         struct se_portal_group *tpg,
1463         struct se_lun_acl *lacl,
1464         u32 unpacked_lun,
1465         u32 lun_access)
1466 {
1467         struct se_lun *lun;
1468         struct se_node_acl *nacl;
1469
1470         lun = core_dev_get_lun(tpg, unpacked_lun);
1471         if (!lun) {
1472                 pr_err("%s Logical Unit Number: %u is not active on"
1473                         " Target Portal Group: %hu, ignoring request.\n",
1474                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1475                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
1476                 return -EINVAL;
1477         }
1478
1479         nacl = lacl->se_lun_nacl;
1480         if (!nacl)
1481                 return -EINVAL;
1482
1483         if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
1484             (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
1485                 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1486
1487         lacl->se_lun = lun;
1488
1489         if (core_update_device_list_for_node(lun, lacl, lacl->mapped_lun,
1490                         lun_access, nacl, tpg, 1) < 0)
1491                 return -EINVAL;
1492
1493         spin_lock(&lun->lun_acl_lock);
1494         list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
1495         atomic_inc(&lun->lun_acl_count);
1496         smp_mb__after_atomic_inc();
1497         spin_unlock(&lun->lun_acl_lock);
1498
1499         pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
1500                 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
1501                 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
1502                 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
1503                 lacl->initiatorname);
1504         /*
1505          * Check to see if there are any existing persistent reservation APTPL
1506          * pre-registrations that need to be enabled for this LUN ACL..
1507          */
1508         core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl);
1509         return 0;
1510 }
1511
1512 /*      core_dev_del_initiator_node_lun_acl():
1513  *
1514  *
1515  */
1516 int core_dev_del_initiator_node_lun_acl(
1517         struct se_portal_group *tpg,
1518         struct se_lun *lun,
1519         struct se_lun_acl *lacl)
1520 {
1521         struct se_node_acl *nacl;
1522
1523         nacl = lacl->se_lun_nacl;
1524         if (!nacl)
1525                 return -EINVAL;
1526
1527         spin_lock(&lun->lun_acl_lock);
1528         list_del(&lacl->lacl_list);
1529         atomic_dec(&lun->lun_acl_count);
1530         smp_mb__after_atomic_dec();
1531         spin_unlock(&lun->lun_acl_lock);
1532
1533         core_update_device_list_for_node(lun, NULL, lacl->mapped_lun,
1534                 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
1535
1536         lacl->se_lun = NULL;
1537
1538         pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for"
1539                 " InitiatorNode: %s Mapped LUN: %u\n",
1540                 tpg->se_tpg_tfo->get_fabric_name(),
1541                 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
1542                 lacl->initiatorname, lacl->mapped_lun);
1543
1544         return 0;
1545 }
1546
1547 void core_dev_free_initiator_node_lun_acl(
1548         struct se_portal_group *tpg,
1549         struct se_lun_acl *lacl)
1550 {
1551         pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
1552                 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1553                 tpg->se_tpg_tfo->tpg_get_tag(tpg),
1554                 tpg->se_tpg_tfo->get_fabric_name(),
1555                 lacl->initiatorname, lacl->mapped_lun);
1556
1557         kfree(lacl);
1558 }
1559
1560 int core_dev_setup_virtual_lun0(void)
1561 {
1562         struct se_hba *hba;
1563         struct se_device *dev;
1564         struct se_subsystem_dev *se_dev = NULL;
1565         struct se_subsystem_api *t;
1566         char buf[16];
1567         int ret;
1568
1569         hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE);
1570         if (IS_ERR(hba))
1571                 return PTR_ERR(hba);
1572
1573         lun0_hba = hba;
1574         t = hba->transport;
1575
1576         se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
1577         if (!se_dev) {
1578                 pr_err("Unable to allocate memory for"
1579                                 " struct se_subsystem_dev\n");
1580                 ret = -ENOMEM;
1581                 goto out;
1582         }
1583         INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
1584         spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
1585         INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
1586         INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
1587         spin_lock_init(&se_dev->t10_pr.registration_lock);
1588         spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
1589         INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
1590         spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
1591         spin_lock_init(&se_dev->se_dev_lock);
1592         se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
1593         se_dev->t10_wwn.t10_sub_dev = se_dev;
1594         se_dev->t10_alua.t10_sub_dev = se_dev;
1595         se_dev->se_dev_attrib.da_sub_dev = se_dev;
1596         se_dev->se_dev_hba = hba;
1597
1598         se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0");
1599         if (!se_dev->se_dev_su_ptr) {
1600                 pr_err("Unable to locate subsystem dependent pointer"
1601                         " from allocate_virtdevice()\n");
1602                 ret = -ENOMEM;
1603                 goto out;
1604         }
1605         lun0_su_dev = se_dev;
1606
1607         memset(buf, 0, 16);
1608         sprintf(buf, "rd_pages=8");
1609         t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf));
1610
1611         dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1612         if (IS_ERR(dev)) {
1613                 ret = PTR_ERR(dev);
1614                 goto out;
1615         }
1616         se_dev->se_dev_ptr = dev;
1617         g_lun0_dev = dev;
1618
1619         return 0;
1620 out:
1621         lun0_su_dev = NULL;
1622         kfree(se_dev);
1623         if (lun0_hba) {
1624                 core_delete_hba(lun0_hba);
1625                 lun0_hba = NULL;
1626         }
1627         return ret;
1628 }
1629
1630
1631 void core_dev_release_virtual_lun0(void)
1632 {
1633         struct se_hba *hba = lun0_hba;
1634         struct se_subsystem_dev *su_dev = lun0_su_dev;
1635
1636         if (!hba)
1637                 return;
1638
1639         if (g_lun0_dev)
1640                 se_free_virtual_device(g_lun0_dev, hba);
1641
1642         kfree(su_dev);
1643         core_delete_hba(hba);
1644 }