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_disable_device_list_for_node(lun, NULL, deve->mapped_lun,
 304                         TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg);
 305                 spin_lock_irq(&nacl->device_list_lock);
 306         }
 307         spin_unlock_irq(&nacl->device_list_lock);
 308
 309         array_free(nacl->device_list, TRANSPORT_MAX_LUNS_PER_TPG);
 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_enable_device_list_for_node():
 346  *
 347  *
 348  */
 349 int core_enable_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 {
 357         struct se_port *port = lun->lun_sep;
 358         struct se_dev_entry *deve;
 359
 360         spin_lock_irq(&nacl->device_list_lock);
 361
 362         deve = nacl->device_list[mapped_lun];
 363
 364         /*
 365          * Check if the call is handling demo mode -> explict LUN ACL
 366          * transition.  This transition must be for the same struct se_lun
 367          * + mapped_lun that was setup in demo mode..
 368          */
 369         if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
 370                 if (deve->se_lun_acl != NULL) {
 371                         pr_err("struct se_dev_entry->se_lun_acl"
 372                                " already set for demo mode -> explict"
 373                                " LUN ACL transition\n");
 374                         spin_unlock_irq(&nacl->device_list_lock);
 375                         return -EINVAL;
 376                 }
 377                 if (deve->se_lun != lun) {
 378                         pr_err("struct se_dev_entry->se_lun does"
 379                                " match passed struct se_lun for demo mode"
 380                                " -> explict LUN ACL transition\n");
 381                         spin_unlock_irq(&nacl->device_list_lock);
 382                         return -EINVAL;
 383                 }
 384                 deve->se_lun_acl = lun_acl;
 385
 386                 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
 387                         deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
 388                         deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
 389                 } else {
 390                         deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
 391                         deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
 392                 }
 393
 394                 spin_unlock_irq(&nacl->device_list_lock);
 395                 return 0;
 396         }
 397
 398         deve->se_lun = lun;
 399         deve->se_lun_acl = lun_acl;
 400         deve->mapped_lun = mapped_lun;
 401         deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS;
 402
 403         if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
 404                 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
 405                 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
 406         } else {
 407                 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
 408                 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
 409         }
 410
 411         deve->creation_time = get_jiffies_64();
 412         deve->attach_count++;
 413         spin_unlock_irq(&nacl->device_list_lock);
 414
 415         spin_lock_bh(&port->sep_alua_lock);
 416         list_add_tail(&deve->alua_port_list, &port->sep_alua_list);
 417         spin_unlock_bh(&port->sep_alua_lock);
 418
 419         return 0;
 420 }
 421
 422 /*      core_disable_device_list_for_node():
 423  *
 424  *
 425  */
 426 int core_disable_device_list_for_node(
 427         struct se_lun *lun,
 428         struct se_lun_acl *lun_acl,
 429         u32 mapped_lun,
 430         u32 lun_access,
 431         struct se_node_acl *nacl,
 432         struct se_portal_group *tpg)
 433 {
 434         struct se_port *port = lun->lun_sep;
 435         struct se_dev_entry *deve = nacl->device_list[mapped_lun];
 436
 437         /*
 438          * If the MappedLUN entry is being disabled, the entry in
 439          * port->sep_alua_list must be removed now before clearing the
 440          * struct se_dev_entry pointers below as logic in
 441          * core_alua_do_transition_tg_pt() depends on these being present.
 442          *
 443          * deve->se_lun_acl will be NULL for demo-mode created LUNs
 444          * that have not been explicitly converted to MappedLUNs ->
 445          * struct se_lun_acl, but we remove deve->alua_port_list from
 446          * port->sep_alua_list. This also means that active UAs and
 447          * NodeACL context specific PR metadata for demo-mode
 448          * MappedLUN *deve will be released below..
 449          */
 450         spin_lock_bh(&port->sep_alua_lock);
 451         list_del(&deve->alua_port_list);
 452         spin_unlock_bh(&port->sep_alua_lock);
 453         /*
 454          * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
 455          * PR operation to complete.
 456          */
 457         while (atomic_read(&deve->pr_ref_count) != 0)
 458                 cpu_relax();
 459
 460         spin_lock_irq(&nacl->device_list_lock);
 461         /*
 462          * Disable struct se_dev_entry LUN ACL mapping
 463          */
 464         core_scsi3_ua_release_all(deve);
 465         deve->se_lun = NULL;
 466         deve->se_lun_acl = NULL;
 467         deve->lun_flags = 0;
 468         deve->creation_time = 0;
 469         deve->attach_count--;
 470         spin_unlock_irq(&nacl->device_list_lock);
 471
 472         core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl);
 473         return 0;
 474 }
 475
 476 /*      core_clear_lun_from_tpg():
 477  *
 478  *
 479  */
 480 void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
 481 {
 482         struct se_node_acl *nacl;
 483         struct se_dev_entry *deve;
 484         u32 i;
 485
 486         spin_lock_irq(&tpg->acl_node_lock);
 487         list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
 488                 spin_unlock_irq(&tpg->acl_node_lock);
 489
 490                 spin_lock_irq(&nacl->device_list_lock);
 491                 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
 492                         deve = nacl->device_list[i];
 493                         if (lun != deve->se_lun)
 494                                 continue;
 495                         spin_unlock_irq(&nacl->device_list_lock);
 496
 497                         core_disable_device_list_for_node(lun, NULL,
 498                                 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS,
 499                                 nacl, tpg);
 500
 501                         spin_lock_irq(&nacl->device_list_lock);
 502                 }
 503                 spin_unlock_irq(&nacl->device_list_lock);
 504
 505                 spin_lock_irq(&tpg->acl_node_lock);
 506         }
 507         spin_unlock_irq(&tpg->acl_node_lock);
 508 }
 509
 510 static struct se_port *core_alloc_port(struct se_device *dev)
 511 {
 512         struct se_port *port, *port_tmp;
 513
 514         port = kzalloc(sizeof(struct se_port), GFP_KERNEL);
 515         if (!port) {
 516                 pr_err("Unable to allocate struct se_port\n");
 517                 return ERR_PTR(-ENOMEM);
 518         }
 519         INIT_LIST_HEAD(&port->sep_alua_list);
 520         INIT_LIST_HEAD(&port->sep_list);
 521         atomic_set(&port->sep_tg_pt_secondary_offline, 0);
 522         spin_lock_init(&port->sep_alua_lock);
 523         mutex_init(&port->sep_tg_pt_md_mutex);
 524
 525         spin_lock(&dev->se_port_lock);
 526         if (dev->dev_port_count == 0x0000ffff) {
 527                 pr_warn("Reached dev->dev_port_count =="
 528                                 " 0x0000ffff\n");
 529                 spin_unlock(&dev->se_port_lock);
 530                 return ERR_PTR(-ENOSPC);
 531         }
 532 again:
 533         /*
 534          * Allocate the next RELATIVE TARGET PORT IDENTIFER for this struct se_device
 535          * Here is the table from spc4r17 section 7.7.3.8.
 536          *
 537          *    Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
 538          *
 539          * Code      Description
 540          * 0h        Reserved
 541          * 1h        Relative port 1, historically known as port A
 542          * 2h        Relative port 2, historically known as port B
 543          * 3h to FFFFh    Relative port 3 through 65 535
 544          */
 545         port->sep_rtpi = dev->dev_rpti_counter++;
 546         if (!port->sep_rtpi)
 547                 goto again;
 548
 549         list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) {
 550                 /*
 551                  * Make sure RELATIVE TARGET PORT IDENTIFER is unique
 552                  * for 16-bit wrap..
 553                  */
 554                 if (port->sep_rtpi == port_tmp->sep_rtpi)
 555                         goto again;
 556         }
 557         spin_unlock(&dev->se_port_lock);
 558
 559         return port;
 560 }
 561
 562 static void core_export_port(
 563         struct se_device *dev,
 564         struct se_portal_group *tpg,
 565         struct se_port *port,
 566         struct se_lun *lun)
 567 {
 568         struct se_subsystem_dev *su_dev = dev->se_sub_dev;
 569         struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL;
 570
 571         spin_lock(&dev->se_port_lock);
 572         spin_lock(&lun->lun_sep_lock);
 573         port->sep_tpg = tpg;
 574         port->sep_lun = lun;
 575         lun->lun_sep = port;
 576         spin_unlock(&lun->lun_sep_lock);
 577
 578         list_add_tail(&port->sep_list, &dev->dev_sep_list);
 579         spin_unlock(&dev->se_port_lock);
 580
 581         if (su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) {
 582                 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port);
 583                 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) {
 584                         pr_err("Unable to allocate t10_alua_tg_pt"
 585                                         "_gp_member_t\n");
 586                         return;
 587                 }
 588                 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
 589                 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
 590                         su_dev->t10_alua.default_tg_pt_gp);
 591                 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
 592                 pr_debug("%s/%s: Adding to default ALUA Target Port"
 593                         " Group: alua/default_tg_pt_gp\n",
 594                         dev->transport->name, tpg->se_tpg_tfo->get_fabric_name());
 595         }
 596
 597         dev->dev_port_count++;
 598         port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFER */
 599 }
 600
 601 /*
 602  *      Called with struct se_device->se_port_lock spinlock held.
 603  */
 604 static void core_release_port(struct se_device *dev, struct se_port *port)
 605         __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock)
 606 {
 607         /*
 608          * Wait for any port reference for PR ALL_TG_PT=1 operation
 609          * to complete in __core_scsi3_alloc_registration()
 610          */
 611         spin_unlock(&dev->se_port_lock);
 612         if (atomic_read(&port->sep_tg_pt_ref_cnt))
 613                 cpu_relax();
 614         spin_lock(&dev->se_port_lock);
 615
 616         core_alua_free_tg_pt_gp_mem(port);
 617
 618         list_del(&port->sep_list);
 619         dev->dev_port_count--;
 620         kfree(port);
 621 }
 622
 623 int core_dev_export(
 624         struct se_device *dev,
 625         struct se_portal_group *tpg,
 626         struct se_lun *lun)
 627 {
 628         struct se_port *port;
 629
 630         port = core_alloc_port(dev);
 631         if (IS_ERR(port))
 632                 return PTR_ERR(port);
 633
 634         lun->lun_se_dev = dev;
 635         se_dev_start(dev);
 636
 637         atomic_inc(&dev->dev_export_obj.obj_access_count);
 638         core_export_port(dev, tpg, port, lun);
 639         return 0;
 640 }
 641
 642 void core_dev_unexport(
 643         struct se_device *dev,
 644         struct se_portal_group *tpg,
 645         struct se_lun *lun)
 646 {
 647         struct se_port *port = lun->lun_sep;
 648
 649         spin_lock(&lun->lun_sep_lock);
 650         if (lun->lun_se_dev == NULL) {
 651                 spin_unlock(&lun->lun_sep_lock);
 652                 return;
 653         }
 654         spin_unlock(&lun->lun_sep_lock);
 655
 656         spin_lock(&dev->se_port_lock);
 657         atomic_dec(&dev->dev_export_obj.obj_access_count);
 658         core_release_port(dev, port);
 659         spin_unlock(&dev->se_port_lock);
 660
 661         se_dev_stop(dev);
 662         lun->lun_se_dev = NULL;
 663 }
 664
 665 int target_report_luns(struct se_cmd *se_cmd)
 666 {
 667         struct se_dev_entry *deve;
 668         struct se_session *se_sess = se_cmd->se_sess;
 669         unsigned char *buf;
 670         u32 lun_count = 0, offset = 8, i;
 671
 672         buf = transport_kmap_data_sg(se_cmd);
 673         if (!buf)
 674                 return -ENOMEM;
 675
 676         /*
 677          * If no struct se_session pointer is present, this struct se_cmd is
 678          * coming via a target_core_mod PASSTHROUGH op, and not through
 679          * a $FABRIC_MOD.  In that case, report LUN=0 only.
 680          */
 681         if (!se_sess) {
 682                 int_to_scsilun(0, (struct scsi_lun *)&buf[offset]);
 683                 lun_count = 1;
 684                 goto done;
 685         }
 686
 687         spin_lock_irq(&se_sess->se_node_acl->device_list_lock);
 688         for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
 689                 deve = se_sess->se_node_acl->device_list[i];
 690                 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
 691                         continue;
 692                 /*
 693                  * We determine the correct LUN LIST LENGTH even once we
 694                  * have reached the initial allocation length.
 695                  * See SPC2-R20 7.19.
 696                  */
 697                 lun_count++;
 698                 if ((offset + 8) > se_cmd->data_length)
 699                         continue;
 700
 701                 int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]);
 702                 offset += 8;
 703         }
 704         spin_unlock_irq(&se_sess->se_node_acl->device_list_lock);
 705
 706         /*
 707          * See SPC3 r07, page 159.
 708          */
 709 done:
 710         lun_count *= 8;
 711         buf[0] = ((lun_count >> 24) & 0xff);
 712         buf[1] = ((lun_count >> 16) & 0xff);
 713         buf[2] = ((lun_count >> 8) & 0xff);
 714         buf[3] = (lun_count & 0xff);
 715         transport_kunmap_data_sg(se_cmd);
 716
 717         target_complete_cmd(se_cmd, GOOD);
 718         return 0;
 719 }
 720
 721 /*      se_release_device_for_hba():
 722  *
 723  *
 724  */
 725 void se_release_device_for_hba(struct se_device *dev)
 726 {
 727         struct se_hba *hba = dev->se_hba;
 728
 729         if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
 730             (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) ||
 731             (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) ||
 732             (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) ||
 733             (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED))
 734                 se_dev_stop(dev);
 735
 736         if (dev->dev_ptr) {
 737                 destroy_workqueue(dev->tmr_wq);
 738                 if (dev->transport->free_device)
 739                         dev->transport->free_device(dev->dev_ptr);
 740         }
 741
 742         spin_lock(&hba->device_lock);
 743         list_del(&dev->dev_list);
 744         hba->dev_count--;
 745         spin_unlock(&hba->device_lock);
 746
 747         core_scsi3_free_all_registrations(dev);
 748         se_release_vpd_for_dev(dev);
 749
 750         kfree(dev);
 751 }
 752
 753 void se_release_vpd_for_dev(struct se_device *dev)
 754 {
 755         struct t10_vpd *vpd, *vpd_tmp;
 756
 757         spin_lock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock);
 758         list_for_each_entry_safe(vpd, vpd_tmp,
 759                         &dev->se_sub_dev->t10_wwn.t10_vpd_list, vpd_list) {
 760                 list_del(&vpd->vpd_list);
 761                 kfree(vpd);
 762         }
 763         spin_unlock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock);
 764 }
 765
 766 /*      se_free_virtual_device():
 767  *
 768  *      Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers.
 769  */
 770 int se_free_virtual_device(struct se_device *dev, struct se_hba *hba)
 771 {
 772         if (!list_empty(&dev->dev_sep_list))
 773                 dump_stack();
 774
 775         core_alua_free_lu_gp_mem(dev);
 776         se_release_device_for_hba(dev);
 777
 778         return 0;
 779 }
 780
 781 static void se_dev_start(struct se_device *dev)
 782 {
 783         struct se_hba *hba = dev->se_hba;
 784
 785         spin_lock(&hba->device_lock);
 786         atomic_inc(&dev->dev_obj.obj_access_count);
 787         if (atomic_read(&dev->dev_obj.obj_access_count) == 1) {
 788                 if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) {
 789                         dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED;
 790                         dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED;
 791                 } else if (dev->dev_status &
 792                            TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) {
 793                         dev->dev_status &=
 794                                 ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
 795                         dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
 796                 }
 797         }
 798         spin_unlock(&hba->device_lock);
 799 }
 800
 801 static void se_dev_stop(struct se_device *dev)
 802 {
 803         struct se_hba *hba = dev->se_hba;
 804
 805         spin_lock(&hba->device_lock);
 806         atomic_dec(&dev->dev_obj.obj_access_count);
 807         if (atomic_read(&dev->dev_obj.obj_access_count) == 0) {
 808                 if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) {
 809                         dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED;
 810                         dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED;
 811                 } else if (dev->dev_status &
 812                            TRANSPORT_DEVICE_OFFLINE_ACTIVATED) {
 813                         dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
 814                         dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
 815                 }
 816         }
 817         spin_unlock(&hba->device_lock);
 818 }
 819
 820 int se_dev_check_online(struct se_device *dev)
 821 {
 822         unsigned long flags;
 823         int ret;
 824
 825         spin_lock_irqsave(&dev->dev_status_lock, flags);
 826         ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
 827                (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1;
 828         spin_unlock_irqrestore(&dev->dev_status_lock, flags);
 829
 830         return ret;
 831 }
 832
 833 int se_dev_check_shutdown(struct se_device *dev)
 834 {
 835         int ret;
 836
 837         spin_lock_irq(&dev->dev_status_lock);
 838         ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN);
 839         spin_unlock_irq(&dev->dev_status_lock);
 840
 841         return ret;
 842 }
 843
 844 static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size)
 845 {
 846         u32 tmp, aligned_max_sectors;
 847         /*
 848          * Limit max_sectors to a PAGE_SIZE aligned value for modern
 849          * transport_allocate_data_tasks() operation.
 850          */
 851         tmp = rounddown((max_sectors * block_size), PAGE_SIZE);
 852         aligned_max_sectors = (tmp / block_size);
 853         if (max_sectors != aligned_max_sectors) {
 854                 printk(KERN_INFO "Rounding down aligned max_sectors from %u"
 855                                 " to %u\n", max_sectors, aligned_max_sectors);
 856                 return aligned_max_sectors;
 857         }
 858
 859         return max_sectors;
 860 }
 861
 862 void se_dev_set_default_attribs(
 863         struct se_device *dev,
 864         struct se_dev_limits *dev_limits)
 865 {
 866         struct queue_limits *limits = &dev_limits->limits;
 867
 868         dev->se_sub_dev->se_dev_attrib.emulate_dpo = DA_EMULATE_DPO;
 869         dev->se_sub_dev->se_dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE;
 870         dev->se_sub_dev->se_dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ;
 871         dev->se_sub_dev->se_dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
 872         dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
 873         dev->se_sub_dev->se_dev_attrib.emulate_tas = DA_EMULATE_TAS;
 874         dev->se_sub_dev->se_dev_attrib.emulate_tpu = DA_EMULATE_TPU;
 875         dev->se_sub_dev->se_dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
 876         dev->se_sub_dev->se_dev_attrib.emulate_reservations = DA_EMULATE_RESERVATIONS;
 877         dev->se_sub_dev->se_dev_attrib.emulate_alua = DA_EMULATE_ALUA;
 878         dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
 879         dev->se_sub_dev->se_dev_attrib.is_nonrot = DA_IS_NONROT;
 880         dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
 881         /*
 882          * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK
 883          * iblock_create_virtdevice() from struct queue_limits values
 884          * if blk_queue_discard()==1
 885          */
 886         dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
 887         dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count =
 888                 DA_MAX_UNMAP_BLOCK_DESC_COUNT;
 889         dev->se_sub_dev->se_dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
 890         dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment =
 891                                 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
 892         /*
 893          * block_size is based on subsystem plugin dependent requirements.
 894          */
 895         dev->se_sub_dev->se_dev_attrib.hw_block_size = limits->logical_block_size;
 896         dev->se_sub_dev->se_dev_attrib.block_size = limits->logical_block_size;
 897         /*
 898          * Align max_hw_sectors down to PAGE_SIZE I/O transfers
 899          */
 900         limits->max_hw_sectors = se_dev_align_max_sectors(limits->max_hw_sectors,
 901                                                 limits->logical_block_size);
 902         dev->se_sub_dev->se_dev_attrib.hw_max_sectors = limits->max_hw_sectors;
 903
 904         /*
 905          * Set fabric_max_sectors, which is reported in block limits
 906          * VPD page (B0h).
 907          */
 908         dev->se_sub_dev->se_dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS;
 909         /*
 910          * Set optimal_sectors from fabric_max_sectors, which can be
 911          * lowered via configfs.
 912          */
 913         dev->se_sub_dev->se_dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS;
 914         /*
 915          * queue_depth is based on subsystem plugin dependent requirements.
 916          */
 917         dev->se_sub_dev->se_dev_attrib.hw_queue_depth = dev_limits->hw_queue_depth;
 918         dev->se_sub_dev->se_dev_attrib.queue_depth = dev_limits->queue_depth;
 919 }
 920
 921 int se_dev_set_max_unmap_lba_count(
 922         struct se_device *dev,
 923         u32 max_unmap_lba_count)
 924 {
 925         dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = max_unmap_lba_count;
 926         pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n",
 927                         dev, dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count);
 928         return 0;
 929 }
 930
 931 int se_dev_set_max_unmap_block_desc_count(
 932         struct se_device *dev,
 933         u32 max_unmap_block_desc_count)
 934 {
 935         dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count =
 936                 max_unmap_block_desc_count;
 937         pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n",
 938                         dev, dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count);
 939         return 0;
 940 }
 941
 942 int se_dev_set_unmap_granularity(
 943         struct se_device *dev,
 944         u32 unmap_granularity)
 945 {
 946         dev->se_sub_dev->se_dev_attrib.unmap_granularity = unmap_granularity;
 947         pr_debug("dev[%p]: Set unmap_granularity: %u\n",
 948                         dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity);
 949         return 0;
 950 }
 951
 952 int se_dev_set_unmap_granularity_alignment(
 953         struct se_device *dev,
 954         u32 unmap_granularity_alignment)
 955 {
 956         dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment;
 957         pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n",
 958                         dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment);
 959         return 0;
 960 }
 961
 962 int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
 963 {
 964         if (flag != 0 && flag != 1) {
 965                 pr_err("Illegal value %d\n", flag);
 966                 return -EINVAL;
 967         }
 968
 969         if (flag) {
 970                 pr_err("dpo_emulated not supported\n");
 971                 return -EINVAL;
 972         }
 973
 974         return 0;
 975 }
 976
 977 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
 978 {
 979         if (flag != 0 && flag != 1) {
 980                 pr_err("Illegal value %d\n", flag);
 981                 return -EINVAL;
 982         }
 983
 984         if (flag && dev->transport->fua_write_emulated == 0) {
 985                 pr_err("fua_write_emulated not supported\n");
 986                 return -EINVAL;
 987         }
 988         dev->se_sub_dev->se_dev_attrib.emulate_fua_write = flag;
 989         pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
 990                         dev, dev->se_sub_dev->se_dev_attrib.emulate_fua_write);
 991         return 0;
 992 }
 993
 994 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
 995 {
 996         if (flag != 0 && flag != 1) {
 997                 pr_err("Illegal value %d\n", flag);
 998                 return -EINVAL;
 999         }
1000
1001         if (flag) {
1002                 pr_err("ua read emulated not supported\n");
1003                 return -EINVAL;
1004         }
1005
1006         return 0;
1007 }
1008
1009 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
1010 {
1011         if (flag != 0 && flag != 1) {
1012                 pr_err("Illegal value %d\n", flag);
1013                 return -EINVAL;
1014         }
1015         if (flag && dev->transport->write_cache_emulated == 0) {
1016                 pr_err("write_cache_emulated not supported\n");
1017                 return -EINVAL;
1018         }
1019         dev->se_sub_dev->se_dev_attrib.emulate_write_cache = flag;
1020         pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
1021                         dev, dev->se_sub_dev->se_dev_attrib.emulate_write_cache);
1022         return 0;
1023 }
1024
1025 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
1026 {
1027         if ((flag != 0) && (flag != 1) && (flag != 2)) {
1028                 pr_err("Illegal value %d\n", flag);
1029                 return -EINVAL;
1030         }
1031
1032         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1033                 pr_err("dev[%p]: Unable to change SE Device"
1034                         " UA_INTRLCK_CTRL while dev_export_obj: %d count"
1035                         " exists\n", dev,
1036                         atomic_read(&dev->dev_export_obj.obj_access_count));
1037                 return -EINVAL;
1038         }
1039         dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = flag;
1040         pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
1041                 dev, dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl);
1042
1043         return 0;
1044 }
1045
1046 int se_dev_set_emulate_tas(struct se_device *dev, int flag)
1047 {
1048         if ((flag != 0) && (flag != 1)) {
1049                 pr_err("Illegal value %d\n", flag);
1050                 return -EINVAL;
1051         }
1052
1053         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1054                 pr_err("dev[%p]: Unable to change SE Device TAS while"
1055                         " dev_export_obj: %d count exists\n", dev,
1056                         atomic_read(&dev->dev_export_obj.obj_access_count));
1057                 return -EINVAL;
1058         }
1059         dev->se_sub_dev->se_dev_attrib.emulate_tas = flag;
1060         pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
1061                 dev, (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? "Enabled" : "Disabled");
1062
1063         return 0;
1064 }
1065
1066 int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
1067 {
1068         if ((flag != 0) && (flag != 1)) {
1069                 pr_err("Illegal value %d\n", flag);
1070                 return -EINVAL;
1071         }
1072         /*
1073          * We expect this value to be non-zero when generic Block Layer
1074          * Discard supported is detected iblock_create_virtdevice().
1075          */
1076         if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) {
1077                 pr_err("Generic Block Discard not supported\n");
1078                 return -ENOSYS;
1079         }
1080
1081         dev->se_sub_dev->se_dev_attrib.emulate_tpu = flag;
1082         pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
1083                                 dev, flag);
1084         return 0;
1085 }
1086
1087 int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
1088 {
1089         if ((flag != 0) && (flag != 1)) {
1090                 pr_err("Illegal value %d\n", flag);
1091                 return -EINVAL;
1092         }
1093         /*
1094          * We expect this value to be non-zero when generic Block Layer
1095          * Discard supported is detected iblock_create_virtdevice().
1096          */
1097         if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) {
1098                 pr_err("Generic Block Discard not supported\n");
1099                 return -ENOSYS;
1100         }
1101
1102         dev->se_sub_dev->se_dev_attrib.emulate_tpws = flag;
1103         pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
1104                                 dev, flag);
1105         return 0;
1106 }
1107
1108 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
1109 {
1110         if ((flag != 0) && (flag != 1)) {
1111                 pr_err("Illegal value %d\n", flag);
1112                 return -EINVAL;
1113         }
1114         dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = flag;
1115         pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
1116                 (dev->se_sub_dev->se_dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled");
1117         return 0;
1118 }
1119
1120 int se_dev_set_is_nonrot(struct se_device *dev, int flag)
1121 {
1122         if ((flag != 0) && (flag != 1)) {
1123                 printk(KERN_ERR "Illegal value %d\n", flag);
1124                 return -EINVAL;
1125         }
1126         dev->se_sub_dev->se_dev_attrib.is_nonrot = flag;
1127         pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n",
1128                dev, flag);
1129         return 0;
1130 }
1131
1132 int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag)
1133 {
1134         if (flag != 0) {
1135                 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted"
1136                         " reordering not implemented\n", dev);
1137                 return -ENOSYS;
1138         }
1139         dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = flag;
1140         pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag);
1141         return 0;
1142 }
1143
1144 /*
1145  * Note, this can only be called on unexported SE Device Object.
1146  */
1147 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
1148 {
1149         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1150                 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1151                         " dev_export_obj: %d count exists\n", dev,
1152                         atomic_read(&dev->dev_export_obj.obj_access_count));
1153                 return -EINVAL;
1154         }
1155         if (!queue_depth) {
1156                 pr_err("dev[%p]: Illegal ZERO value for queue"
1157                         "_depth\n", dev);
1158                 return -EINVAL;
1159         }
1160
1161         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1162                 if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) {
1163                         pr_err("dev[%p]: Passed queue_depth: %u"
1164                                 " exceeds TCM/SE_Device TCQ: %u\n",
1165                                 dev, queue_depth,
1166                                 dev->se_sub_dev->se_dev_attrib.hw_queue_depth);
1167                         return -EINVAL;
1168                 }
1169         } else {
1170                 if (queue_depth > dev->se_sub_dev->se_dev_attrib.queue_depth) {
1171                         if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) {
1172                                 pr_err("dev[%p]: Passed queue_depth:"
1173                                         " %u exceeds TCM/SE_Device MAX"
1174                                         " TCQ: %u\n", dev, queue_depth,
1175                                         dev->se_sub_dev->se_dev_attrib.hw_queue_depth);
1176                                 return -EINVAL;
1177                         }
1178                 }
1179         }
1180
1181         dev->se_sub_dev->se_dev_attrib.queue_depth = dev->queue_depth = queue_depth;
1182         pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n",
1183                         dev, queue_depth);
1184         return 0;
1185 }
1186
1187 int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors)
1188 {
1189         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1190                 pr_err("dev[%p]: Unable to change SE Device"
1191                         " fabric_max_sectors while dev_export_obj: %d count exists\n",
1192                         dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1193                 return -EINVAL;
1194         }
1195         if (!fabric_max_sectors) {
1196                 pr_err("dev[%p]: Illegal ZERO value for"
1197                         " fabric_max_sectors\n", dev);
1198                 return -EINVAL;
1199         }
1200         if (fabric_max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
1201                 pr_err("dev[%p]: Passed fabric_max_sectors: %u less than"
1202                         " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, fabric_max_sectors,
1203                                 DA_STATUS_MAX_SECTORS_MIN);
1204                 return -EINVAL;
1205         }
1206         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1207                 if (fabric_max_sectors > dev->se_sub_dev->se_dev_attrib.hw_max_sectors) {
1208                         pr_err("dev[%p]: Passed fabric_max_sectors: %u"
1209                                 " greater than TCM/SE_Device max_sectors:"
1210                                 " %u\n", dev, fabric_max_sectors,
1211                                 dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
1212                          return -EINVAL;
1213                 }
1214         } else {
1215                 if (fabric_max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
1216                         pr_err("dev[%p]: Passed fabric_max_sectors: %u"
1217                                 " greater than DA_STATUS_MAX_SECTORS_MAX:"
1218                                 " %u\n", dev, fabric_max_sectors,
1219                                 DA_STATUS_MAX_SECTORS_MAX);
1220                         return -EINVAL;
1221                 }
1222         }
1223         /*
1224          * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
1225          */
1226         fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors,
1227                                                       dev->se_sub_dev->se_dev_attrib.block_size);
1228
1229         dev->se_sub_dev->se_dev_attrib.fabric_max_sectors = fabric_max_sectors;
1230         pr_debug("dev[%p]: SE Device max_sectors changed to %u\n",
1231                         dev, fabric_max_sectors);
1232         return 0;
1233 }
1234
1235 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
1236 {
1237         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1238                 pr_err("dev[%p]: Unable to change SE Device"
1239                         " optimal_sectors while dev_export_obj: %d count exists\n",
1240                         dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1241                 return -EINVAL;
1242         }
1243         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1244                 pr_err("dev[%p]: Passed optimal_sectors cannot be"
1245                                 " changed for TCM/pSCSI\n", dev);
1246                 return -EINVAL;
1247         }
1248         if (optimal_sectors > dev->se_sub_dev->se_dev_attrib.fabric_max_sectors) {
1249                 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1250                         " greater than fabric_max_sectors: %u\n", dev,
1251                         optimal_sectors, dev->se_sub_dev->se_dev_attrib.fabric_max_sectors);
1252                 return -EINVAL;
1253         }
1254
1255         dev->se_sub_dev->se_dev_attrib.optimal_sectors = optimal_sectors;
1256         pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1257                         dev, optimal_sectors);
1258         return 0;
1259 }
1260
1261 int se_dev_set_block_size(struct se_device *dev, u32 block_size)
1262 {
1263         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1264                 pr_err("dev[%p]: Unable to change SE Device block_size"
1265                         " while dev_export_obj: %d count exists\n", dev,
1266                         atomic_read(&dev->dev_export_obj.obj_access_count));
1267                 return -EINVAL;
1268         }
1269
1270         if ((block_size != 512) &&
1271             (block_size != 1024) &&
1272             (block_size != 2048) &&
1273             (block_size != 4096)) {
1274                 pr_err("dev[%p]: Illegal value for block_device: %u"
1275                         " for SE device, must be 512, 1024, 2048 or 4096\n",
1276                         dev, block_size);
1277                 return -EINVAL;
1278         }
1279
1280         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1281                 pr_err("dev[%p]: Not allowed to change block_size for"
1282                         " Physical Device, use for Linux/SCSI to change"
1283                         " block_size for underlying hardware\n", dev);
1284                 return -EINVAL;
1285         }
1286
1287         dev->se_sub_dev->se_dev_attrib.block_size = block_size;
1288         pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1289                         dev, block_size);
1290         return 0;
1291 }
1292
1293 struct se_lun *core_dev_add_lun(
1294         struct se_portal_group *tpg,
1295         struct se_device *dev,
1296         u32 lun)
1297 {
1298         struct se_lun *lun_p;
1299         int rc;
1300
1301         if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) {
1302                 pr_err("Unable to export struct se_device while dev_access_obj: %d\n",
1303                         atomic_read(&dev->dev_access_obj.obj_access_count));
1304                 return ERR_PTR(-EACCES);
1305         }
1306
1307         lun_p = core_tpg_pre_addlun(tpg, lun);
1308         if (IS_ERR(lun_p))
1309                 return lun_p;
1310
1311         rc = core_tpg_post_addlun(tpg, lun_p,
1312                                 TRANSPORT_LUNFLAGS_READ_WRITE, dev);
1313         if (rc < 0)
1314                 return ERR_PTR(rc);
1315
1316         pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
1317                 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1318                 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun_p->unpacked_lun,
1319                 tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id);
1320         /*
1321          * Update LUN maps for dynamically added initiators when
1322          * generate_node_acl is enabled.
1323          */
1324         if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) {
1325                 struct se_node_acl *acl;
1326                 spin_lock_irq(&tpg->acl_node_lock);
1327                 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
1328                         if (acl->dynamic_node_acl &&
1329                             (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only ||
1330                              !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) {
1331                                 spin_unlock_irq(&tpg->acl_node_lock);
1332                                 core_tpg_add_node_to_devs(acl, tpg);
1333                                 spin_lock_irq(&tpg->acl_node_lock);
1334                         }
1335                 }
1336                 spin_unlock_irq(&tpg->acl_node_lock);
1337         }
1338
1339         return lun_p;
1340 }
1341
1342 /*      core_dev_del_lun():
1343  *
1344  *
1345  */
1346 int core_dev_del_lun(
1347         struct se_portal_group *tpg,
1348         u32 unpacked_lun)
1349 {
1350         struct se_lun *lun;
1351
1352         lun = core_tpg_pre_dellun(tpg, unpacked_lun);
1353         if (IS_ERR(lun))
1354                 return PTR_ERR(lun);
1355
1356         core_tpg_post_dellun(tpg, lun);
1357
1358         pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from"
1359                 " device object\n", tpg->se_tpg_tfo->get_fabric_name(),
1360                 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun,
1361                 tpg->se_tpg_tfo->get_fabric_name());
1362
1363         return 0;
1364 }
1365
1366 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
1367 {
1368         struct se_lun *lun;
1369
1370         spin_lock(&tpg->tpg_lun_lock);
1371         if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1372                 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
1373                         "_PER_TPG-1: %u for Target Portal Group: %hu\n",
1374                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1375                         TRANSPORT_MAX_LUNS_PER_TPG-1,
1376                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
1377                 spin_unlock(&tpg->tpg_lun_lock);
1378                 return NULL;
1379         }
1380         lun = tpg->tpg_lun_list[unpacked_lun];
1381
1382         if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
1383                 pr_err("%s Logical Unit Number: %u is not free on"
1384                         " Target Portal Group: %hu, ignoring request.\n",
1385                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1386                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
1387                 spin_unlock(&tpg->tpg_lun_lock);
1388                 return NULL;
1389         }
1390         spin_unlock(&tpg->tpg_lun_lock);
1391
1392         return lun;
1393 }
1394
1395 /*      core_dev_get_lun():
1396  *
1397  *
1398  */
1399 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
1400 {
1401         struct se_lun *lun;
1402
1403         spin_lock(&tpg->tpg_lun_lock);
1404         if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1405                 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
1406                         "_TPG-1: %u for Target Portal Group: %hu\n",
1407                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1408                         TRANSPORT_MAX_LUNS_PER_TPG-1,
1409                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
1410                 spin_unlock(&tpg->tpg_lun_lock);
1411                 return NULL;
1412         }
1413         lun = tpg->tpg_lun_list[unpacked_lun];
1414
1415         if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
1416                 pr_err("%s Logical Unit Number: %u is not active on"
1417                         " Target Portal Group: %hu, ignoring request.\n",
1418                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1419                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
1420                 spin_unlock(&tpg->tpg_lun_lock);
1421                 return NULL;
1422         }
1423         spin_unlock(&tpg->tpg_lun_lock);
1424
1425         return lun;
1426 }
1427
1428 struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
1429         struct se_portal_group *tpg,
1430         u32 mapped_lun,
1431         char *initiatorname,
1432         int *ret)
1433 {
1434         struct se_lun_acl *lacl;
1435         struct se_node_acl *nacl;
1436
1437         if (strlen(initiatorname) >= TRANSPORT_IQN_LEN) {
1438                 pr_err("%s InitiatorName exceeds maximum size.\n",
1439                         tpg->se_tpg_tfo->get_fabric_name());
1440                 *ret = -EOVERFLOW;
1441                 return NULL;
1442         }
1443         nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
1444         if (!nacl) {
1445                 *ret = -EINVAL;
1446                 return NULL;
1447         }
1448         lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
1449         if (!lacl) {
1450                 pr_err("Unable to allocate memory for struct se_lun_acl.\n");
1451                 *ret = -ENOMEM;
1452                 return NULL;
1453         }
1454
1455         INIT_LIST_HEAD(&lacl->lacl_list);
1456         lacl->mapped_lun = mapped_lun;
1457         lacl->se_lun_nacl = nacl;
1458         snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
1459
1460         return lacl;
1461 }
1462
1463 int core_dev_add_initiator_node_lun_acl(
1464         struct se_portal_group *tpg,
1465         struct se_lun_acl *lacl,
1466         u32 unpacked_lun,
1467         u32 lun_access)
1468 {
1469         struct se_lun *lun;
1470         struct se_node_acl *nacl;
1471
1472         lun = core_dev_get_lun(tpg, unpacked_lun);
1473         if (!lun) {
1474                 pr_err("%s Logical Unit Number: %u is not active on"
1475                         " Target Portal Group: %hu, ignoring request.\n",
1476                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1477                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
1478                 return -EINVAL;
1479         }
1480
1481         nacl = lacl->se_lun_nacl;
1482         if (!nacl)
1483                 return -EINVAL;
1484
1485         if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
1486             (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
1487                 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1488
1489         lacl->se_lun = lun;
1490
1491         if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun,
1492                         lun_access, nacl, tpg) < 0)
1493                 return -EINVAL;
1494
1495         spin_lock(&lun->lun_acl_lock);
1496         list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
1497         atomic_inc(&lun->lun_acl_count);
1498         smp_mb__after_atomic_inc();
1499         spin_unlock(&lun->lun_acl_lock);
1500
1501         pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
1502                 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
1503                 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
1504                 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
1505                 lacl->initiatorname);
1506         /*
1507          * Check to see if there are any existing persistent reservation APTPL
1508          * pre-registrations that need to be enabled for this LUN ACL..
1509          */
1510         core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl);
1511         return 0;
1512 }
1513
1514 /*      core_dev_del_initiator_node_lun_acl():
1515  *
1516  *
1517  */
1518 int core_dev_del_initiator_node_lun_acl(
1519         struct se_portal_group *tpg,
1520         struct se_lun *lun,
1521         struct se_lun_acl *lacl)
1522 {
1523         struct se_node_acl *nacl;
1524
1525         nacl = lacl->se_lun_nacl;
1526         if (!nacl)
1527                 return -EINVAL;
1528
1529         spin_lock(&lun->lun_acl_lock);
1530         list_del(&lacl->lacl_list);
1531         atomic_dec(&lun->lun_acl_count);
1532         smp_mb__after_atomic_dec();
1533         spin_unlock(&lun->lun_acl_lock);
1534
1535         core_disable_device_list_for_node(lun, NULL, lacl->mapped_lun,
1536                 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg);
1537
1538         lacl->se_lun = NULL;
1539
1540         pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for"
1541                 " InitiatorNode: %s Mapped LUN: %u\n",
1542                 tpg->se_tpg_tfo->get_fabric_name(),
1543                 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
1544                 lacl->initiatorname, lacl->mapped_lun);
1545
1546         return 0;
1547 }
1548
1549 void core_dev_free_initiator_node_lun_acl(
1550         struct se_portal_group *tpg,
1551         struct se_lun_acl *lacl)
1552 {
1553         pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
1554                 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1555                 tpg->se_tpg_tfo->tpg_get_tag(tpg),
1556                 tpg->se_tpg_tfo->get_fabric_name(),
1557                 lacl->initiatorname, lacl->mapped_lun);
1558
1559         kfree(lacl);
1560 }
1561
1562 int core_dev_setup_virtual_lun0(void)
1563 {
1564         struct se_hba *hba;
1565         struct se_device *dev;
1566         struct se_subsystem_dev *se_dev = NULL;
1567         struct se_subsystem_api *t;
1568         char buf[16];
1569         int ret;
1570
1571         hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE);
1572         if (IS_ERR(hba))
1573                 return PTR_ERR(hba);
1574
1575         lun0_hba = hba;
1576         t = hba->transport;
1577
1578         se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
1579         if (!se_dev) {
1580                 pr_err("Unable to allocate memory for"
1581                                 " struct se_subsystem_dev\n");
1582                 ret = -ENOMEM;
1583                 goto out;
1584         }
1585         INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
1586         spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
1587         INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
1588         INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
1589         spin_lock_init(&se_dev->t10_pr.registration_lock);
1590         spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
1591         INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
1592         spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
1593         spin_lock_init(&se_dev->se_dev_lock);
1594         se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
1595         se_dev->t10_wwn.t10_sub_dev = se_dev;
1596         se_dev->t10_alua.t10_sub_dev = se_dev;
1597         se_dev->se_dev_attrib.da_sub_dev = se_dev;
1598         se_dev->se_dev_hba = hba;
1599
1600         se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0");
1601         if (!se_dev->se_dev_su_ptr) {
1602                 pr_err("Unable to locate subsystem dependent pointer"
1603                         " from allocate_virtdevice()\n");
1604                 ret = -ENOMEM;
1605                 goto out;
1606         }
1607         lun0_su_dev = se_dev;
1608
1609         memset(buf, 0, 16);
1610         sprintf(buf, "rd_pages=8");
1611         t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf));
1612
1613         dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1614         if (IS_ERR(dev)) {
1615                 ret = PTR_ERR(dev);
1616                 goto out;
1617         }
1618         se_dev->se_dev_ptr = dev;
1619         g_lun0_dev = dev;
1620
1621         return 0;
1622 out:
1623         lun0_su_dev = NULL;
1624         kfree(se_dev);
1625         if (lun0_hba) {
1626                 core_delete_hba(lun0_hba);
1627                 lun0_hba = NULL;
1628         }
1629         return ret;
1630 }
1631
1632
1633 void core_dev_release_virtual_lun0(void)
1634 {
1635         struct se_hba *hba = lun0_hba;
1636         struct se_subsystem_dev *su_dev = lun0_su_dev;
1637
1638         if (!hba)
1639                 return;
1640
1641         if (g_lun0_dev)
1642                 se_free_virtual_device(g_lun0_dev, hba);
1643
1644         kfree(su_dev);
1645         core_delete_hba(hba);
1646 }