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  * (c) Copyright 2003-2013 Datera, Inc.
   8  *
   9  * Nicholas A. Bellinger <nab@kernel.org>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  24  *
  25  ******************************************************************************/
  26
  27 #include <linux/net.h>
  28 #include <linux/string.h>
  29 #include <linux/delay.h>
  30 #include <linux/timer.h>
  31 #include <linux/slab.h>
  32 #include <linux/spinlock.h>
  33 #include <linux/kthread.h>
  34 #include <linux/in.h>
  35 #include <linux/export.h>
  36 #include <asm/unaligned.h>
  37 #include <net/sock.h>
  38 #include <net/tcp.h>
  39 #include <scsi/scsi.h>
  40 #include <scsi/scsi_device.h>
  41
  42 #include <target/target_core_base.h>
  43 #include <target/target_core_backend.h>
  44 #include <target/target_core_fabric.h>
  45
  46 #include "target_core_internal.h"
  47 #include "target_core_alua.h"
  48 #include "target_core_pr.h"
  49 #include "target_core_ua.h"
  50
  51 DEFINE_MUTEX(g_device_mutex);
  52 LIST_HEAD(g_device_list);
  53
  54 static struct se_hba *lun0_hba;
  55 /* not static, needed by tpg.c */
  56 struct se_device *g_lun0_dev;
  57
  58 sense_reason_t
  59 transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
  60 {
  61         struct se_lun *se_lun = NULL;
  62         struct se_session *se_sess = se_cmd->se_sess;
  63         struct se_device *dev;
  64         unsigned long flags;
  65
  66         if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG)
  67                 return TCM_NON_EXISTENT_LUN;
  68
  69         spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
  70         se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun];
  71         if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
  72                 struct se_dev_entry *deve = se_cmd->se_deve;
  73
  74                 deve->total_cmds++;
  75
  76                 if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
  77                     (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) {
  78                         pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
  79                                 " Access for 0x%08x\n",
  80                                 se_cmd->se_tfo->get_fabric_name(),
  81                                 unpacked_lun);
  82                         spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
  83                         return TCM_WRITE_PROTECTED;
  84                 }
  85
  86                 if (se_cmd->data_direction == DMA_TO_DEVICE)
  87                         deve->write_bytes += se_cmd->data_length;
  88                 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
  89                         deve->read_bytes += se_cmd->data_length;
  90
  91                 se_lun = deve->se_lun;
  92                 se_cmd->se_lun = deve->se_lun;
  93                 se_cmd->pr_res_key = deve->pr_res_key;
  94                 se_cmd->orig_fe_lun = unpacked_lun;
  95                 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
  96
  97                 percpu_ref_get(&se_lun->lun_ref);
  98                 se_cmd->lun_ref_active = true;
  99         }
 100         spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
 101
 102         if (!se_lun) {
 103                 /*
 104                  * Use the se_portal_group->tpg_virt_lun0 to allow for
 105                  * REPORT_LUNS, et al to be returned when no active
 106                  * MappedLUN=0 exists for this Initiator Port.
 107                  */
 108                 if (unpacked_lun != 0) {
 109                         pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
 110                                 " Access for 0x%08x\n",
 111                                 se_cmd->se_tfo->get_fabric_name(),
 112                                 unpacked_lun);
 113                         return TCM_NON_EXISTENT_LUN;
 114                 }
 115                 /*
 116                  * Force WRITE PROTECT for virtual LUN 0
 117                  */
 118                 if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
 119                     (se_cmd->data_direction != DMA_NONE))
 120                         return TCM_WRITE_PROTECTED;
 121
 122                 se_lun = &se_sess->se_tpg->tpg_virt_lun0;
 123                 se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0;
 124                 se_cmd->orig_fe_lun = 0;
 125                 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
 126
 127                 percpu_ref_get(&se_lun->lun_ref);
 128                 se_cmd->lun_ref_active = true;
 129         }
 130
 131         /* Directly associate cmd with se_dev */
 132         se_cmd->se_dev = se_lun->lun_se_dev;
 133
 134         dev = se_lun->lun_se_dev;
 135         atomic_long_inc(&dev->num_cmds);
 136         if (se_cmd->data_direction == DMA_TO_DEVICE)
 137                 atomic_long_add(se_cmd->data_length, &dev->write_bytes);
 138         else if (se_cmd->data_direction == DMA_FROM_DEVICE)
 139                 atomic_long_add(se_cmd->data_length, &dev->read_bytes);
 140
 141         return 0;
 142 }
 143 EXPORT_SYMBOL(transport_lookup_cmd_lun);
 144
 145 int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
 146 {
 147         struct se_dev_entry *deve;
 148         struct se_lun *se_lun = NULL;
 149         struct se_session *se_sess = se_cmd->se_sess;
 150         struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
 151         unsigned long flags;
 152
 153         if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG)
 154                 return -ENODEV;
 155
 156         spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
 157         se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun];
 158         deve = se_cmd->se_deve;
 159
 160         if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
 161                 se_tmr->tmr_lun = deve->se_lun;
 162                 se_cmd->se_lun = deve->se_lun;
 163                 se_lun = deve->se_lun;
 164                 se_cmd->pr_res_key = deve->pr_res_key;
 165                 se_cmd->orig_fe_lun = unpacked_lun;
 166         }
 167         spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
 168
 169         if (!se_lun) {
 170                 pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
 171                         " Access for 0x%08x\n",
 172                         se_cmd->se_tfo->get_fabric_name(),
 173                         unpacked_lun);
 174                 return -ENODEV;
 175         }
 176
 177         /* Directly associate cmd with se_dev */
 178         se_cmd->se_dev = se_lun->lun_se_dev;
 179         se_tmr->tmr_dev = se_lun->lun_se_dev;
 180
 181         spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags);
 182         list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list);
 183         spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags);
 184
 185         return 0;
 186 }
 187 EXPORT_SYMBOL(transport_lookup_tmr_lun);
 188
 189 /*
 190  * This function is called from core_scsi3_emulate_pro_register_and_move()
 191  * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count
 192  * when a matching rtpi is found.
 193  */
 194 struct se_dev_entry *core_get_se_deve_from_rtpi(
 195         struct se_node_acl *nacl,
 196         u16 rtpi)
 197 {
 198         struct se_dev_entry *deve;
 199         struct se_lun *lun;
 200         struct se_port *port;
 201         struct se_portal_group *tpg = nacl->se_tpg;
 202         u32 i;
 203
 204         spin_lock_irq(&nacl->device_list_lock);
 205         for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
 206                 deve = nacl->device_list[i];
 207
 208                 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
 209                         continue;
 210
 211                 lun = deve->se_lun;
 212                 if (!lun) {
 213                         pr_err("%s device entries device pointer is"
 214                                 " NULL, but Initiator has access.\n",
 215                                 tpg->se_tpg_tfo->get_fabric_name());
 216                         continue;
 217                 }
 218                 port = lun->lun_sep;
 219                 if (!port) {
 220                         pr_err("%s device entries device pointer is"
 221                                 " NULL, but Initiator has access.\n",
 222                                 tpg->se_tpg_tfo->get_fabric_name());
 223                         continue;
 224                 }
 225                 if (port->sep_rtpi != rtpi)
 226                         continue;
 227
 228                 atomic_inc_mb(&deve->pr_ref_count);
 229                 spin_unlock_irq(&nacl->device_list_lock);
 230
 231                 return deve;
 232         }
 233         spin_unlock_irq(&nacl->device_list_lock);
 234
 235         return NULL;
 236 }
 237
 238 int core_free_device_list_for_node(
 239         struct se_node_acl *nacl,
 240         struct se_portal_group *tpg)
 241 {
 242         struct se_dev_entry *deve;
 243         struct se_lun *lun;
 244         u32 i;
 245
 246         if (!nacl->device_list)
 247                 return 0;
 248
 249         spin_lock_irq(&nacl->device_list_lock);
 250         for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
 251                 deve = nacl->device_list[i];
 252
 253                 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
 254                         continue;
 255
 256                 if (!deve->se_lun) {
 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                 lun = deve->se_lun;
 263
 264                 spin_unlock_irq(&nacl->device_list_lock);
 265                 core_disable_device_list_for_node(lun, NULL, deve->mapped_lun,
 266                         TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg);
 267                 spin_lock_irq(&nacl->device_list_lock);
 268         }
 269         spin_unlock_irq(&nacl->device_list_lock);
 270
 271         array_free(nacl->device_list, TRANSPORT_MAX_LUNS_PER_TPG);
 272         nacl->device_list = NULL;
 273
 274         return 0;
 275 }
 276
 277 void core_update_device_list_access(
 278         u32 mapped_lun,
 279         u32 lun_access,
 280         struct se_node_acl *nacl)
 281 {
 282         struct se_dev_entry *deve;
 283
 284         spin_lock_irq(&nacl->device_list_lock);
 285         deve = nacl->device_list[mapped_lun];
 286         if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
 287                 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
 288                 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
 289         } else {
 290                 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
 291                 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
 292         }
 293         spin_unlock_irq(&nacl->device_list_lock);
 294 }
 295
 296 /*      core_enable_device_list_for_node():
 297  *
 298  *
 299  */
 300 int core_enable_device_list_for_node(
 301         struct se_lun *lun,
 302         struct se_lun_acl *lun_acl,
 303         u32 mapped_lun,
 304         u32 lun_access,
 305         struct se_node_acl *nacl,
 306         struct se_portal_group *tpg)
 307 {
 308         struct se_port *port = lun->lun_sep;
 309         struct se_dev_entry *deve;
 310
 311         spin_lock_irq(&nacl->device_list_lock);
 312
 313         deve = nacl->device_list[mapped_lun];
 314
 315         /*
 316          * Check if the call is handling demo mode -> explicit LUN ACL
 317          * transition.  This transition must be for the same struct se_lun
 318          * + mapped_lun that was setup in demo mode..
 319          */
 320         if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
 321                 if (deve->se_lun_acl != NULL) {
 322                         pr_err("struct se_dev_entry->se_lun_acl"
 323                                " already set for demo mode -> explicit"
 324                                " LUN ACL transition\n");
 325                         spin_unlock_irq(&nacl->device_list_lock);
 326                         return -EINVAL;
 327                 }
 328                 if (deve->se_lun != lun) {
 329                         pr_err("struct se_dev_entry->se_lun does"
 330                                " match passed struct se_lun for demo mode"
 331                                " -> explicit LUN ACL transition\n");
 332                         spin_unlock_irq(&nacl->device_list_lock);
 333                         return -EINVAL;
 334                 }
 335                 deve->se_lun_acl = lun_acl;
 336
 337                 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
 338                         deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
 339                         deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
 340                 } else {
 341                         deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
 342                         deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
 343                 }
 344
 345                 spin_unlock_irq(&nacl->device_list_lock);
 346                 return 0;
 347         }
 348
 349         deve->se_lun = lun;
 350         deve->se_lun_acl = lun_acl;
 351         deve->mapped_lun = mapped_lun;
 352         deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS;
 353
 354         if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
 355                 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
 356                 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
 357         } else {
 358                 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
 359                 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
 360         }
 361
 362         deve->creation_time = get_jiffies_64();
 363         deve->attach_count++;
 364         spin_unlock_irq(&nacl->device_list_lock);
 365
 366         spin_lock_bh(&port->sep_alua_lock);
 367         list_add_tail(&deve->alua_port_list, &port->sep_alua_list);
 368         spin_unlock_bh(&port->sep_alua_lock);
 369
 370         return 0;
 371 }
 372
 373 /*      core_disable_device_list_for_node():
 374  *
 375  *
 376  */
 377 int core_disable_device_list_for_node(
 378         struct se_lun *lun,
 379         struct se_lun_acl *lun_acl,
 380         u32 mapped_lun,
 381         u32 lun_access,
 382         struct se_node_acl *nacl,
 383         struct se_portal_group *tpg)
 384 {
 385         struct se_port *port = lun->lun_sep;
 386         struct se_dev_entry *deve = nacl->device_list[mapped_lun];
 387
 388         /*
 389          * If the MappedLUN entry is being disabled, the entry in
 390          * port->sep_alua_list must be removed now before clearing the
 391          * struct se_dev_entry pointers below as logic in
 392          * core_alua_do_transition_tg_pt() depends on these being present.
 393          *
 394          * deve->se_lun_acl will be NULL for demo-mode created LUNs
 395          * that have not been explicitly converted to MappedLUNs ->
 396          * struct se_lun_acl, but we remove deve->alua_port_list from
 397          * port->sep_alua_list. This also means that active UAs and
 398          * NodeACL context specific PR metadata for demo-mode
 399          * MappedLUN *deve will be released below..
 400          */
 401         spin_lock_bh(&port->sep_alua_lock);
 402         list_del(&deve->alua_port_list);
 403         spin_unlock_bh(&port->sep_alua_lock);
 404         /*
 405          * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
 406          * PR operation to complete.
 407          */
 408         while (atomic_read(&deve->pr_ref_count) != 0)
 409                 cpu_relax();
 410
 411         spin_lock_irq(&nacl->device_list_lock);
 412         /*
 413          * Disable struct se_dev_entry LUN ACL mapping
 414          */
 415         core_scsi3_ua_release_all(deve);
 416         deve->se_lun = NULL;
 417         deve->se_lun_acl = NULL;
 418         deve->lun_flags = 0;
 419         deve->creation_time = 0;
 420         deve->attach_count--;
 421         spin_unlock_irq(&nacl->device_list_lock);
 422
 423         core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl);
 424         return 0;
 425 }
 426
 427 /*      core_clear_lun_from_tpg():
 428  *
 429  *
 430  */
 431 void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
 432 {
 433         struct se_node_acl *nacl;
 434         struct se_dev_entry *deve;
 435         u32 i;
 436
 437         spin_lock_irq(&tpg->acl_node_lock);
 438         list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
 439                 spin_unlock_irq(&tpg->acl_node_lock);
 440
 441                 spin_lock_irq(&nacl->device_list_lock);
 442                 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
 443                         deve = nacl->device_list[i];
 444                         if (lun != deve->se_lun)
 445                                 continue;
 446                         spin_unlock_irq(&nacl->device_list_lock);
 447
 448                         core_disable_device_list_for_node(lun, NULL,
 449                                 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS,
 450                                 nacl, tpg);
 451
 452                         spin_lock_irq(&nacl->device_list_lock);
 453                 }
 454                 spin_unlock_irq(&nacl->device_list_lock);
 455
 456                 spin_lock_irq(&tpg->acl_node_lock);
 457         }
 458         spin_unlock_irq(&tpg->acl_node_lock);
 459 }
 460
 461 static struct se_port *core_alloc_port(struct se_device *dev)
 462 {
 463         struct se_port *port, *port_tmp;
 464
 465         port = kzalloc(sizeof(struct se_port), GFP_KERNEL);
 466         if (!port) {
 467                 pr_err("Unable to allocate struct se_port\n");
 468                 return ERR_PTR(-ENOMEM);
 469         }
 470         INIT_LIST_HEAD(&port->sep_alua_list);
 471         INIT_LIST_HEAD(&port->sep_list);
 472         atomic_set(&port->sep_tg_pt_secondary_offline, 0);
 473         spin_lock_init(&port->sep_alua_lock);
 474         mutex_init(&port->sep_tg_pt_md_mutex);
 475
 476         spin_lock(&dev->se_port_lock);
 477         if (dev->dev_port_count == 0x0000ffff) {
 478                 pr_warn("Reached dev->dev_port_count =="
 479                                 " 0x0000ffff\n");
 480                 spin_unlock(&dev->se_port_lock);
 481                 return ERR_PTR(-ENOSPC);
 482         }
 483 again:
 484         /*
 485          * Allocate the next RELATIVE TARGET PORT IDENTIFIER for this struct se_device
 486          * Here is the table from spc4r17 section 7.7.3.8.
 487          *
 488          *    Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
 489          *
 490          * Code      Description
 491          * 0h        Reserved
 492          * 1h        Relative port 1, historically known as port A
 493          * 2h        Relative port 2, historically known as port B
 494          * 3h to FFFFh    Relative port 3 through 65 535
 495          */
 496         port->sep_rtpi = dev->dev_rpti_counter++;
 497         if (!port->sep_rtpi)
 498                 goto again;
 499
 500         list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) {
 501                 /*
 502                  * Make sure RELATIVE TARGET PORT IDENTIFIER is unique
 503                  * for 16-bit wrap..
 504                  */
 505                 if (port->sep_rtpi == port_tmp->sep_rtpi)
 506                         goto again;
 507         }
 508         spin_unlock(&dev->se_port_lock);
 509
 510         return port;
 511 }
 512
 513 static void core_export_port(
 514         struct se_device *dev,
 515         struct se_portal_group *tpg,
 516         struct se_port *port,
 517         struct se_lun *lun)
 518 {
 519         struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL;
 520
 521         spin_lock(&dev->se_port_lock);
 522         spin_lock(&lun->lun_sep_lock);
 523         port->sep_tpg = tpg;
 524         port->sep_lun = lun;
 525         lun->lun_sep = port;
 526         spin_unlock(&lun->lun_sep_lock);
 527
 528         list_add_tail(&port->sep_list, &dev->dev_sep_list);
 529         spin_unlock(&dev->se_port_lock);
 530
 531         if (!(dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) &&
 532             !(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) {
 533                 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port);
 534                 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) {
 535                         pr_err("Unable to allocate t10_alua_tg_pt"
 536                                         "_gp_member_t\n");
 537                         return;
 538                 }
 539                 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
 540                 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
 541                         dev->t10_alua.default_tg_pt_gp);
 542                 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
 543                 pr_debug("%s/%s: Adding to default ALUA Target Port"
 544                         " Group: alua/default_tg_pt_gp\n",
 545                         dev->transport->name, tpg->se_tpg_tfo->get_fabric_name());
 546         }
 547
 548         dev->dev_port_count++;
 549         port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFIER */
 550 }
 551
 552 /*
 553  *      Called with struct se_device->se_port_lock spinlock held.
 554  */
 555 static void core_release_port(struct se_device *dev, struct se_port *port)
 556         __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock)
 557 {
 558         /*
 559          * Wait for any port reference for PR ALL_TG_PT=1 operation
 560          * to complete in __core_scsi3_alloc_registration()
 561          */
 562         spin_unlock(&dev->se_port_lock);
 563         if (atomic_read(&port->sep_tg_pt_ref_cnt))
 564                 cpu_relax();
 565         spin_lock(&dev->se_port_lock);
 566
 567         core_alua_free_tg_pt_gp_mem(port);
 568
 569         list_del(&port->sep_list);
 570         dev->dev_port_count--;
 571         kfree(port);
 572 }
 573
 574 int core_dev_export(
 575         struct se_device *dev,
 576         struct se_portal_group *tpg,
 577         struct se_lun *lun)
 578 {
 579         struct se_hba *hba = dev->se_hba;
 580         struct se_port *port;
 581
 582         port = core_alloc_port(dev);
 583         if (IS_ERR(port))
 584                 return PTR_ERR(port);
 585
 586         lun->lun_se_dev = dev;
 587
 588         spin_lock(&hba->device_lock);
 589         dev->export_count++;
 590         spin_unlock(&hba->device_lock);
 591
 592         core_export_port(dev, tpg, port, lun);
 593         return 0;
 594 }
 595
 596 void core_dev_unexport(
 597         struct se_device *dev,
 598         struct se_portal_group *tpg,
 599         struct se_lun *lun)
 600 {
 601         struct se_hba *hba = dev->se_hba;
 602         struct se_port *port = lun->lun_sep;
 603
 604         spin_lock(&lun->lun_sep_lock);
 605         if (lun->lun_se_dev == NULL) {
 606                 spin_unlock(&lun->lun_sep_lock);
 607                 return;
 608         }
 609         spin_unlock(&lun->lun_sep_lock);
 610
 611         spin_lock(&dev->se_port_lock);
 612         core_release_port(dev, port);
 613         spin_unlock(&dev->se_port_lock);
 614
 615         spin_lock(&hba->device_lock);
 616         dev->export_count--;
 617         spin_unlock(&hba->device_lock);
 618
 619         lun->lun_sep = NULL;
 620         lun->lun_se_dev = NULL;
 621 }
 622
 623 static void se_release_vpd_for_dev(struct se_device *dev)
 624 {
 625         struct t10_vpd *vpd, *vpd_tmp;
 626
 627         spin_lock(&dev->t10_wwn.t10_vpd_lock);
 628         list_for_each_entry_safe(vpd, vpd_tmp,
 629                         &dev->t10_wwn.t10_vpd_list, vpd_list) {
 630                 list_del(&vpd->vpd_list);
 631                 kfree(vpd);
 632         }
 633         spin_unlock(&dev->t10_wwn.t10_vpd_lock);
 634 }
 635
 636 static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size)
 637 {
 638         u32 aligned_max_sectors;
 639         u32 alignment;
 640         /*
 641          * Limit max_sectors to a PAGE_SIZE aligned value for modern
 642          * transport_allocate_data_tasks() operation.
 643          */
 644         alignment = max(1ul, PAGE_SIZE / block_size);
 645         aligned_max_sectors = rounddown(max_sectors, alignment);
 646
 647         if (max_sectors != aligned_max_sectors)
 648                 pr_info("Rounding down aligned max_sectors from %u to %u\n",
 649                         max_sectors, aligned_max_sectors);
 650
 651         return aligned_max_sectors;
 652 }
 653
 654 bool se_dev_check_wce(struct se_device *dev)
 655 {
 656         bool wce = false;
 657
 658         if (dev->transport->get_write_cache)
 659                 wce = dev->transport->get_write_cache(dev);
 660         else if (dev->dev_attrib.emulate_write_cache > 0)
 661                 wce = true;
 662
 663         return wce;
 664 }
 665
 666 int se_dev_set_max_unmap_lba_count(
 667         struct se_device *dev,
 668         u32 max_unmap_lba_count)
 669 {
 670         dev->dev_attrib.max_unmap_lba_count = max_unmap_lba_count;
 671         pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n",
 672                         dev, dev->dev_attrib.max_unmap_lba_count);
 673         return 0;
 674 }
 675 EXPORT_SYMBOL(se_dev_set_max_unmap_lba_count);
 676
 677 int se_dev_set_max_unmap_block_desc_count(
 678         struct se_device *dev,
 679         u32 max_unmap_block_desc_count)
 680 {
 681         dev->dev_attrib.max_unmap_block_desc_count =
 682                 max_unmap_block_desc_count;
 683         pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n",
 684                         dev, dev->dev_attrib.max_unmap_block_desc_count);
 685         return 0;
 686 }
 687 EXPORT_SYMBOL(se_dev_set_max_unmap_block_desc_count);
 688
 689 int se_dev_set_unmap_granularity(
 690         struct se_device *dev,
 691         u32 unmap_granularity)
 692 {
 693         dev->dev_attrib.unmap_granularity = unmap_granularity;
 694         pr_debug("dev[%p]: Set unmap_granularity: %u\n",
 695                         dev, dev->dev_attrib.unmap_granularity);
 696         return 0;
 697 }
 698 EXPORT_SYMBOL(se_dev_set_unmap_granularity);
 699
 700 int se_dev_set_unmap_granularity_alignment(
 701         struct se_device *dev,
 702         u32 unmap_granularity_alignment)
 703 {
 704         dev->dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment;
 705         pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n",
 706                         dev, dev->dev_attrib.unmap_granularity_alignment);
 707         return 0;
 708 }
 709 EXPORT_SYMBOL(se_dev_set_unmap_granularity_alignment);
 710
 711 int se_dev_set_max_write_same_len(
 712         struct se_device *dev,
 713         u32 max_write_same_len)
 714 {
 715         dev->dev_attrib.max_write_same_len = max_write_same_len;
 716         pr_debug("dev[%p]: Set max_write_same_len: %u\n",
 717                         dev, dev->dev_attrib.max_write_same_len);
 718         return 0;
 719 }
 720 EXPORT_SYMBOL(se_dev_set_max_write_same_len);
 721
 722 static void dev_set_t10_wwn_model_alias(struct se_device *dev)
 723 {
 724         const char *configname;
 725
 726         configname = config_item_name(&dev->dev_group.cg_item);
 727         if (strlen(configname) >= 16) {
 728                 pr_warn("dev[%p]: Backstore name '%s' is too long for "
 729                         "INQUIRY_MODEL, truncating to 16 bytes\n", dev,
 730                         configname);
 731         }
 732         snprintf(&dev->t10_wwn.model[0], 16, "%s", configname);
 733 }
 734
 735 int se_dev_set_emulate_model_alias(struct se_device *dev, int flag)
 736 {
 737         if (dev->export_count) {
 738                 pr_err("dev[%p]: Unable to change model alias"
 739                         " while export_count is %d\n",
 740                         dev, dev->export_count);
 741                         return -EINVAL;
 742         }
 743
 744         if (flag != 0 && flag != 1) {
 745                 pr_err("Illegal value %d\n", flag);
 746                 return -EINVAL;
 747         }
 748
 749         if (flag) {
 750                 dev_set_t10_wwn_model_alias(dev);
 751         } else {
 752                 strncpy(&dev->t10_wwn.model[0],
 753                         dev->transport->inquiry_prod, 16);
 754         }
 755         dev->dev_attrib.emulate_model_alias = flag;
 756
 757         return 0;
 758 }
 759 EXPORT_SYMBOL(se_dev_set_emulate_model_alias);
 760
 761 int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
 762 {
 763         printk_once(KERN_WARNING
 764                 "ignoring deprecated emulate_dpo attribute\n");
 765         return 0;
 766 }
 767 EXPORT_SYMBOL(se_dev_set_emulate_dpo);
 768
 769 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
 770 {
 771         if (flag != 0 && flag != 1) {
 772                 pr_err("Illegal value %d\n", flag);
 773                 return -EINVAL;
 774         }
 775         if (flag &&
 776             dev->transport->get_write_cache) {
 777                 pr_warn("emulate_fua_write not supported for this device, ignoring\n");
 778                 return 0;
 779         }
 780         if (dev->export_count) {
 781                 pr_err("emulate_fua_write cannot be changed with active"
 782                        " exports: %d\n", dev->export_count);
 783                 return -EINVAL;
 784         }
 785         dev->dev_attrib.emulate_fua_write = flag;
 786         pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
 787                         dev, dev->dev_attrib.emulate_fua_write);
 788         return 0;
 789 }
 790 EXPORT_SYMBOL(se_dev_set_emulate_fua_write);
 791
 792 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
 793 {
 794         printk_once(KERN_WARNING
 795                 "ignoring deprecated emulate_fua_read attribute\n");
 796         return 0;
 797 }
 798 EXPORT_SYMBOL(se_dev_set_emulate_fua_read);
 799
 800 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
 801 {
 802         if (flag != 0 && flag != 1) {
 803                 pr_err("Illegal value %d\n", flag);
 804                 return -EINVAL;
 805         }
 806         if (flag &&
 807             dev->transport->get_write_cache) {
 808                 pr_err("emulate_write_cache not supported for this device\n");
 809                 return -EINVAL;
 810         }
 811         if (dev->export_count) {
 812                 pr_err("emulate_write_cache cannot be changed with active"
 813                        " exports: %d\n", dev->export_count);
 814                 return -EINVAL;
 815         }
 816         dev->dev_attrib.emulate_write_cache = flag;
 817         pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
 818                         dev, dev->dev_attrib.emulate_write_cache);
 819         return 0;
 820 }
 821 EXPORT_SYMBOL(se_dev_set_emulate_write_cache);
 822
 823 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
 824 {
 825         if ((flag != 0) && (flag != 1) && (flag != 2)) {
 826                 pr_err("Illegal value %d\n", flag);
 827                 return -EINVAL;
 828         }
 829
 830         if (dev->export_count) {
 831                 pr_err("dev[%p]: Unable to change SE Device"
 832                         " UA_INTRLCK_CTRL while export_count is %d\n",
 833                         dev, dev->export_count);
 834                 return -EINVAL;
 835         }
 836         dev->dev_attrib.emulate_ua_intlck_ctrl = flag;
 837         pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
 838                 dev, dev->dev_attrib.emulate_ua_intlck_ctrl);
 839
 840         return 0;
 841 }
 842 EXPORT_SYMBOL(se_dev_set_emulate_ua_intlck_ctrl);
 843
 844 int se_dev_set_emulate_tas(struct se_device *dev, int flag)
 845 {
 846         if ((flag != 0) && (flag != 1)) {
 847                 pr_err("Illegal value %d\n", flag);
 848                 return -EINVAL;
 849         }
 850
 851         if (dev->export_count) {
 852                 pr_err("dev[%p]: Unable to change SE Device TAS while"
 853                         " export_count is %d\n",
 854                         dev, dev->export_count);
 855                 return -EINVAL;
 856         }
 857         dev->dev_attrib.emulate_tas = flag;
 858         pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
 859                 dev, (dev->dev_attrib.emulate_tas) ? "Enabled" : "Disabled");
 860
 861         return 0;
 862 }
 863 EXPORT_SYMBOL(se_dev_set_emulate_tas);
 864
 865 int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
 866 {
 867         if ((flag != 0) && (flag != 1)) {
 868                 pr_err("Illegal value %d\n", flag);
 869                 return -EINVAL;
 870         }
 871         /*
 872          * We expect this value to be non-zero when generic Block Layer
 873          * Discard supported is detected iblock_create_virtdevice().
 874          */
 875         if (flag && !dev->dev_attrib.max_unmap_block_desc_count) {
 876                 pr_err("Generic Block Discard not supported\n");
 877                 return -ENOSYS;
 878         }
 879
 880         dev->dev_attrib.emulate_tpu = flag;
 881         pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
 882                                 dev, flag);
 883         return 0;
 884 }
 885 EXPORT_SYMBOL(se_dev_set_emulate_tpu);
 886
 887 int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
 888 {
 889         if ((flag != 0) && (flag != 1)) {
 890                 pr_err("Illegal value %d\n", flag);
 891                 return -EINVAL;
 892         }
 893         /*
 894          * We expect this value to be non-zero when generic Block Layer
 895          * Discard supported is detected iblock_create_virtdevice().
 896          */
 897         if (flag && !dev->dev_attrib.max_unmap_block_desc_count) {
 898                 pr_err("Generic Block Discard not supported\n");
 899                 return -ENOSYS;
 900         }
 901
 902         dev->dev_attrib.emulate_tpws = flag;
 903         pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
 904                                 dev, flag);
 905         return 0;
 906 }
 907 EXPORT_SYMBOL(se_dev_set_emulate_tpws);
 908
 909 int se_dev_set_emulate_caw(struct se_device *dev, int flag)
 910 {
 911         if (flag != 0 && flag != 1) {
 912                 pr_err("Illegal value %d\n", flag);
 913                 return -EINVAL;
 914         }
 915         dev->dev_attrib.emulate_caw = flag;
 916         pr_debug("dev[%p]: SE Device CompareAndWrite (AtomicTestandSet): %d\n",
 917                  dev, flag);
 918
 919         return 0;
 920 }
 921 EXPORT_SYMBOL(se_dev_set_emulate_caw);
 922
 923 int se_dev_set_emulate_3pc(struct se_device *dev, int flag)
 924 {
 925         if (flag != 0 && flag != 1) {
 926                 pr_err("Illegal value %d\n", flag);
 927                 return -EINVAL;
 928         }
 929         dev->dev_attrib.emulate_3pc = flag;
 930         pr_debug("dev[%p]: SE Device 3rd Party Copy (EXTENDED_COPY): %d\n",
 931                 dev, flag);
 932
 933         return 0;
 934 }
 935 EXPORT_SYMBOL(se_dev_set_emulate_3pc);
 936
 937 int se_dev_set_pi_prot_type(struct se_device *dev, int flag)
 938 {
 939         int rc, old_prot = dev->dev_attrib.pi_prot_type;
 940
 941         if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
 942                 pr_err("Illegal value %d for pi_prot_type\n", flag);
 943                 return -EINVAL;
 944         }
 945         if (flag == 2) {
 946                 pr_err("DIF TYPE2 protection currently not supported\n");
 947                 return -ENOSYS;
 948         }
 949         if (dev->dev_attrib.hw_pi_prot_type) {
 950                 pr_warn("DIF protection enabled on underlying hardware,"
 951                         " ignoring\n");
 952                 return 0;
 953         }
 954         if (!dev->transport->init_prot || !dev->transport->free_prot) {
 955                 /* 0 is only allowed value for non-supporting backends */
 956                 if (flag == 0)
 957                         return 0;
 958
 959                 pr_err("DIF protection not supported by backend: %s\n",
 960                        dev->transport->name);
 961                 return -ENOSYS;
 962         }
 963         if (!(dev->dev_flags & DF_CONFIGURED)) {
 964                 pr_err("DIF protection requires device to be configured\n");
 965                 return -ENODEV;
 966         }
 967         if (dev->export_count) {
 968                 pr_err("dev[%p]: Unable to change SE Device PROT type while"
 969                        " export_count is %d\n", dev, dev->export_count);
 970                 return -EINVAL;
 971         }
 972
 973         dev->dev_attrib.pi_prot_type = flag;
 974
 975         if (flag && !old_prot) {
 976                 rc = dev->transport->init_prot(dev);
 977                 if (rc) {
 978                         dev->dev_attrib.pi_prot_type = old_prot;
 979                         return rc;
 980                 }
 981
 982         } else if (!flag && old_prot) {
 983                 dev->transport->free_prot(dev);
 984         }
 985         pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
 986
 987         return 0;
 988 }
 989 EXPORT_SYMBOL(se_dev_set_pi_prot_type);
 990
 991 int se_dev_set_pi_prot_format(struct se_device *dev, int flag)
 992 {
 993         int rc;
 994
 995         if (!flag)
 996                 return 0;
 997
 998         if (flag != 1) {
 999                 pr_err("Illegal value %d for pi_prot_format\n", flag);
1000                 return -EINVAL;
1001         }
1002         if (!dev->transport->format_prot) {
1003                 pr_err("DIF protection format not supported by backend %s\n",
1004                        dev->transport->name);
1005                 return -ENOSYS;
1006         }
1007         if (!(dev->dev_flags & DF_CONFIGURED)) {
1008                 pr_err("DIF protection format requires device to be configured\n");
1009                 return -ENODEV;
1010         }
1011         if (dev->export_count) {
1012                 pr_err("dev[%p]: Unable to format SE Device PROT type while"
1013                        " export_count is %d\n", dev, dev->export_count);
1014                 return -EINVAL;
1015         }
1016
1017         rc = dev->transport->format_prot(dev);
1018         if (rc)
1019                 return rc;
1020
1021         pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
1022
1023         return 0;
1024 }
1025 EXPORT_SYMBOL(se_dev_set_pi_prot_format);
1026
1027 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
1028 {
1029         if ((flag != 0) && (flag != 1)) {
1030                 pr_err("Illegal value %d\n", flag);
1031                 return -EINVAL;
1032         }
1033         dev->dev_attrib.enforce_pr_isids = flag;
1034         pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
1035                 (dev->dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled");
1036         return 0;
1037 }
1038 EXPORT_SYMBOL(se_dev_set_enforce_pr_isids);
1039
1040 int se_dev_set_force_pr_aptpl(struct se_device *dev, int flag)
1041 {
1042         if ((flag != 0) && (flag != 1)) {
1043                 printk(KERN_ERR "Illegal value %d\n", flag);
1044                 return -EINVAL;
1045         }
1046         if (dev->export_count) {
1047                 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
1048                        " export_count is %d\n", dev, dev->export_count);
1049                 return -EINVAL;
1050         }
1051
1052         dev->dev_attrib.force_pr_aptpl = flag;
1053         pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", dev, flag);
1054         return 0;
1055 }
1056 EXPORT_SYMBOL(se_dev_set_force_pr_aptpl);
1057
1058 int se_dev_set_is_nonrot(struct se_device *dev, int flag)
1059 {
1060         if ((flag != 0) && (flag != 1)) {
1061                 printk(KERN_ERR "Illegal value %d\n", flag);
1062                 return -EINVAL;
1063         }
1064         dev->dev_attrib.is_nonrot = flag;
1065         pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n",
1066                dev, flag);
1067         return 0;
1068 }
1069 EXPORT_SYMBOL(se_dev_set_is_nonrot);
1070
1071 int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag)
1072 {
1073         if (flag != 0) {
1074                 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted"
1075                         " reordering not implemented\n", dev);
1076                 return -ENOSYS;
1077         }
1078         dev->dev_attrib.emulate_rest_reord = flag;
1079         pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag);
1080         return 0;
1081 }
1082 EXPORT_SYMBOL(se_dev_set_emulate_rest_reord);
1083
1084 /*
1085  * Note, this can only be called on unexported SE Device Object.
1086  */
1087 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
1088 {
1089         if (dev->export_count) {
1090                 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1091                         " export_count is %d\n",
1092                         dev, dev->export_count);
1093                 return -EINVAL;
1094         }
1095         if (!queue_depth) {
1096                 pr_err("dev[%p]: Illegal ZERO value for queue"
1097                         "_depth\n", dev);
1098                 return -EINVAL;
1099         }
1100
1101         if (queue_depth > dev->dev_attrib.queue_depth) {
1102                 if (queue_depth > dev->dev_attrib.hw_queue_depth) {
1103                         pr_err("dev[%p]: Passed queue_depth:"
1104                                 " %u exceeds TCM/SE_Device MAX"
1105                                 " TCQ: %u\n", dev, queue_depth,
1106                                 dev->dev_attrib.hw_queue_depth);
1107                         return -EINVAL;
1108                 }
1109         }
1110         dev->dev_attrib.queue_depth = dev->queue_depth = queue_depth;
1111         pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n",
1112                         dev, queue_depth);
1113         return 0;
1114 }
1115 EXPORT_SYMBOL(se_dev_set_queue_depth);
1116
1117 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
1118 {
1119         if (dev->export_count) {
1120                 pr_err("dev[%p]: Unable to change SE Device"
1121                         " optimal_sectors while export_count is %d\n",
1122                         dev, dev->export_count);
1123                 return -EINVAL;
1124         }
1125         if (optimal_sectors > dev->dev_attrib.hw_max_sectors) {
1126                 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1127                         " greater than hw_max_sectors: %u\n", dev,
1128                         optimal_sectors, dev->dev_attrib.hw_max_sectors);
1129                 return -EINVAL;
1130         }
1131
1132         dev->dev_attrib.optimal_sectors = optimal_sectors;
1133         pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1134                         dev, optimal_sectors);
1135         return 0;
1136 }
1137 EXPORT_SYMBOL(se_dev_set_optimal_sectors);
1138
1139 int se_dev_set_block_size(struct se_device *dev, u32 block_size)
1140 {
1141         if (dev->export_count) {
1142                 pr_err("dev[%p]: Unable to change SE Device block_size"
1143                         " while export_count is %d\n",
1144                         dev, dev->export_count);
1145                 return -EINVAL;
1146         }
1147
1148         if ((block_size != 512) &&
1149             (block_size != 1024) &&
1150             (block_size != 2048) &&
1151             (block_size != 4096)) {
1152                 pr_err("dev[%p]: Illegal value for block_device: %u"
1153                         " for SE device, must be 512, 1024, 2048 or 4096\n",
1154                         dev, block_size);
1155                 return -EINVAL;
1156         }
1157
1158         dev->dev_attrib.block_size = block_size;
1159         pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1160                         dev, block_size);
1161
1162         if (dev->dev_attrib.max_bytes_per_io)
1163                 dev->dev_attrib.hw_max_sectors =
1164                         dev->dev_attrib.max_bytes_per_io / block_size;
1165
1166         return 0;
1167 }
1168 EXPORT_SYMBOL(se_dev_set_block_size);
1169
1170 struct se_lun *core_dev_add_lun(
1171         struct se_portal_group *tpg,
1172         struct se_device *dev,
1173         u32 unpacked_lun)
1174 {
1175         struct se_lun *lun;
1176         int rc;
1177
1178         lun = core_tpg_alloc_lun(tpg, unpacked_lun);
1179         if (IS_ERR(lun))
1180                 return lun;
1181
1182         rc = core_tpg_add_lun(tpg, lun,
1183                                 TRANSPORT_LUNFLAGS_READ_WRITE, dev);
1184         if (rc < 0)
1185                 return ERR_PTR(rc);
1186
1187         pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
1188                 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1189                 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
1190                 tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id);
1191         /*
1192          * Update LUN maps for dynamically added initiators when
1193          * generate_node_acl is enabled.
1194          */
1195         if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) {
1196                 struct se_node_acl *acl;
1197                 spin_lock_irq(&tpg->acl_node_lock);
1198                 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
1199                         if (acl->dynamic_node_acl &&
1200                             (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only ||
1201                              !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) {
1202                                 spin_unlock_irq(&tpg->acl_node_lock);
1203                                 core_tpg_add_node_to_devs(acl, tpg);
1204                                 spin_lock_irq(&tpg->acl_node_lock);
1205                         }
1206                 }
1207                 spin_unlock_irq(&tpg->acl_node_lock);
1208         }
1209
1210         return lun;
1211 }
1212
1213 /*      core_dev_del_lun():
1214  *
1215  *
1216  */
1217 void core_dev_del_lun(
1218         struct se_portal_group *tpg,
1219         struct se_lun *lun)
1220 {
1221         pr_debug("%s_TPG[%u]_LUN[%u] - Deactivating %s Logical Unit from"
1222                 " device object\n", tpg->se_tpg_tfo->get_fabric_name(),
1223                 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
1224                 tpg->se_tpg_tfo->get_fabric_name());
1225
1226         core_tpg_remove_lun(tpg, lun);
1227 }
1228
1229 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
1230 {
1231         struct se_lun *lun;
1232
1233         spin_lock(&tpg->tpg_lun_lock);
1234         if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1235                 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
1236                         "_PER_TPG-1: %u for Target Portal Group: %hu\n",
1237                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1238                         TRANSPORT_MAX_LUNS_PER_TPG-1,
1239                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
1240                 spin_unlock(&tpg->tpg_lun_lock);
1241                 return NULL;
1242         }
1243         lun = tpg->tpg_lun_list[unpacked_lun];
1244
1245         if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
1246                 pr_err("%s Logical Unit Number: %u is not free on"
1247                         " Target Portal Group: %hu, ignoring request.\n",
1248                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1249                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
1250                 spin_unlock(&tpg->tpg_lun_lock);
1251                 return NULL;
1252         }
1253         spin_unlock(&tpg->tpg_lun_lock);
1254
1255         return lun;
1256 }
1257
1258 /*      core_dev_get_lun():
1259  *
1260  *
1261  */
1262 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
1263 {
1264         struct se_lun *lun;
1265
1266         spin_lock(&tpg->tpg_lun_lock);
1267         if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1268                 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
1269                         "_TPG-1: %u for Target Portal Group: %hu\n",
1270                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1271                         TRANSPORT_MAX_LUNS_PER_TPG-1,
1272                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
1273                 spin_unlock(&tpg->tpg_lun_lock);
1274                 return NULL;
1275         }
1276         lun = tpg->tpg_lun_list[unpacked_lun];
1277
1278         if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
1279                 pr_err("%s Logical Unit Number: %u is not active on"
1280                         " Target Portal Group: %hu, ignoring request.\n",
1281                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1282                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
1283                 spin_unlock(&tpg->tpg_lun_lock);
1284                 return NULL;
1285         }
1286         spin_unlock(&tpg->tpg_lun_lock);
1287
1288         return lun;
1289 }
1290
1291 struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
1292         struct se_portal_group *tpg,
1293         struct se_node_acl *nacl,
1294         u32 mapped_lun,
1295         int *ret)
1296 {
1297         struct se_lun_acl *lacl;
1298
1299         if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) {
1300                 pr_err("%s InitiatorName exceeds maximum size.\n",
1301                         tpg->se_tpg_tfo->get_fabric_name());
1302                 *ret = -EOVERFLOW;
1303                 return NULL;
1304         }
1305         lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
1306         if (!lacl) {
1307                 pr_err("Unable to allocate memory for struct se_lun_acl.\n");
1308                 *ret = -ENOMEM;
1309                 return NULL;
1310         }
1311
1312         INIT_LIST_HEAD(&lacl->lacl_list);
1313         lacl->mapped_lun = mapped_lun;
1314         lacl->se_lun_nacl = nacl;
1315         snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s",
1316                  nacl->initiatorname);
1317
1318         return lacl;
1319 }
1320
1321 int core_dev_add_initiator_node_lun_acl(
1322         struct se_portal_group *tpg,
1323         struct se_lun_acl *lacl,
1324         u32 unpacked_lun,
1325         u32 lun_access)
1326 {
1327         struct se_lun *lun;
1328         struct se_node_acl *nacl;
1329
1330         lun = core_dev_get_lun(tpg, unpacked_lun);
1331         if (!lun) {
1332                 pr_err("%s Logical Unit Number: %u is not active on"
1333                         " Target Portal Group: %hu, ignoring request.\n",
1334                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1335                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
1336                 return -EINVAL;
1337         }
1338
1339         nacl = lacl->se_lun_nacl;
1340         if (!nacl)
1341                 return -EINVAL;
1342
1343         if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
1344             (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
1345                 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1346
1347         lacl->se_lun = lun;
1348
1349         if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun,
1350                         lun_access, nacl, tpg) < 0)
1351                 return -EINVAL;
1352
1353         spin_lock(&lun->lun_acl_lock);
1354         list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
1355         atomic_inc_mb(&lun->lun_acl_count);
1356         spin_unlock(&lun->lun_acl_lock);
1357
1358         pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
1359                 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
1360                 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
1361                 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
1362                 lacl->initiatorname);
1363         /*
1364          * Check to see if there are any existing persistent reservation APTPL
1365          * pre-registrations that need to be enabled for this LUN ACL..
1366          */
1367         core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, nacl,
1368                                             lacl->mapped_lun);
1369         return 0;
1370 }
1371
1372 /*      core_dev_del_initiator_node_lun_acl():
1373  *
1374  *
1375  */
1376 int core_dev_del_initiator_node_lun_acl(
1377         struct se_portal_group *tpg,
1378         struct se_lun *lun,
1379         struct se_lun_acl *lacl)
1380 {
1381         struct se_node_acl *nacl;
1382
1383         nacl = lacl->se_lun_nacl;
1384         if (!nacl)
1385                 return -EINVAL;
1386
1387         spin_lock(&lun->lun_acl_lock);
1388         list_del(&lacl->lacl_list);
1389         atomic_dec_mb(&lun->lun_acl_count);
1390         spin_unlock(&lun->lun_acl_lock);
1391
1392         core_disable_device_list_for_node(lun, NULL, lacl->mapped_lun,
1393                 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg);
1394
1395         lacl->se_lun = NULL;
1396
1397         pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for"
1398                 " InitiatorNode: %s Mapped LUN: %u\n",
1399                 tpg->se_tpg_tfo->get_fabric_name(),
1400                 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
1401                 lacl->initiatorname, lacl->mapped_lun);
1402
1403         return 0;
1404 }
1405
1406 void core_dev_free_initiator_node_lun_acl(
1407         struct se_portal_group *tpg,
1408         struct se_lun_acl *lacl)
1409 {
1410         pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
1411                 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1412                 tpg->se_tpg_tfo->tpg_get_tag(tpg),
1413                 tpg->se_tpg_tfo->get_fabric_name(),
1414                 lacl->initiatorname, lacl->mapped_lun);
1415
1416         kfree(lacl);
1417 }
1418
1419 static void scsi_dump_inquiry(struct se_device *dev)
1420 {
1421         struct t10_wwn *wwn = &dev->t10_wwn;
1422         char buf[17];
1423         int i, device_type;
1424         /*
1425          * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer
1426          */
1427         for (i = 0; i < 8; i++)
1428                 if (wwn->vendor[i] >= 0x20)
1429                         buf[i] = wwn->vendor[i];
1430                 else
1431                         buf[i] = ' ';
1432         buf[i] = '\0';
1433         pr_debug("  Vendor: %s\n", buf);
1434
1435         for (i = 0; i < 16; i++)
1436                 if (wwn->model[i] >= 0x20)
1437                         buf[i] = wwn->model[i];
1438                 else
1439                         buf[i] = ' ';
1440         buf[i] = '\0';
1441         pr_debug("  Model: %s\n", buf);
1442
1443         for (i = 0; i < 4; i++)
1444                 if (wwn->revision[i] >= 0x20)
1445                         buf[i] = wwn->revision[i];
1446                 else
1447                         buf[i] = ' ';
1448         buf[i] = '\0';
1449         pr_debug("  Revision: %s\n", buf);
1450
1451         device_type = dev->transport->get_device_type(dev);
1452         pr_debug("  Type:   %s ", scsi_device_type(device_type));
1453 }
1454
1455 struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
1456 {
1457         struct se_device *dev;
1458         struct se_lun *xcopy_lun;
1459
1460         dev = hba->transport->alloc_device(hba, name);
1461         if (!dev)
1462                 return NULL;
1463
1464         dev->dev_link_magic = SE_DEV_LINK_MAGIC;
1465         dev->se_hba = hba;
1466         dev->transport = hba->transport;
1467         dev->prot_length = sizeof(struct se_dif_v1_tuple);
1468
1469         INIT_LIST_HEAD(&dev->dev_list);
1470         INIT_LIST_HEAD(&dev->dev_sep_list);
1471         INIT_LIST_HEAD(&dev->dev_tmr_list);
1472         INIT_LIST_HEAD(&dev->delayed_cmd_list);
1473         INIT_LIST_HEAD(&dev->state_list);
1474         INIT_LIST_HEAD(&dev->qf_cmd_list);
1475         INIT_LIST_HEAD(&dev->g_dev_node);
1476         spin_lock_init(&dev->execute_task_lock);
1477         spin_lock_init(&dev->delayed_cmd_lock);
1478         spin_lock_init(&dev->dev_reservation_lock);
1479         spin_lock_init(&dev->se_port_lock);
1480         spin_lock_init(&dev->se_tmr_lock);
1481         spin_lock_init(&dev->qf_cmd_lock);
1482         sema_init(&dev->caw_sem, 1);
1483         atomic_set(&dev->dev_ordered_id, 0);
1484         INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list);
1485         spin_lock_init(&dev->t10_wwn.t10_vpd_lock);
1486         INIT_LIST_HEAD(&dev->t10_pr.registration_list);
1487         INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list);
1488         spin_lock_init(&dev->t10_pr.registration_lock);
1489         spin_lock_init(&dev->t10_pr.aptpl_reg_lock);
1490         INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list);
1491         spin_lock_init(&dev->t10_alua.tg_pt_gps_lock);
1492         INIT_LIST_HEAD(&dev->t10_alua.lba_map_list);
1493         spin_lock_init(&dev->t10_alua.lba_map_lock);
1494
1495         dev->t10_wwn.t10_dev = dev;
1496         dev->t10_alua.t10_dev = dev;
1497
1498         dev->dev_attrib.da_dev = dev;
1499         dev->dev_attrib.emulate_model_alias = DA_EMULATE_MODEL_ALIAS;
1500         dev->dev_attrib.emulate_dpo = 1;
1501         dev->dev_attrib.emulate_fua_write = 1;
1502         dev->dev_attrib.emulate_fua_read = 1;
1503         dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
1504         dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
1505         dev->dev_attrib.emulate_tas = DA_EMULATE_TAS;
1506         dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU;
1507         dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
1508         dev->dev_attrib.emulate_caw = DA_EMULATE_CAW;
1509         dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC;
1510         dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE0_PROT;
1511         dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
1512         dev->dev_attrib.force_pr_aptpl = DA_FORCE_PR_APTPL;
1513         dev->dev_attrib.is_nonrot = DA_IS_NONROT;
1514         dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
1515         dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
1516         dev->dev_attrib.max_unmap_block_desc_count =
1517                 DA_MAX_UNMAP_BLOCK_DESC_COUNT;
1518         dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
1519         dev->dev_attrib.unmap_granularity_alignment =
1520                                 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
1521         dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN;
1522
1523         xcopy_lun = &dev->xcopy_lun;
1524         xcopy_lun->lun_se_dev = dev;
1525         init_completion(&xcopy_lun->lun_shutdown_comp);
1526         INIT_LIST_HEAD(&xcopy_lun->lun_acl_list);
1527         spin_lock_init(&xcopy_lun->lun_acl_lock);
1528         spin_lock_init(&xcopy_lun->lun_sep_lock);
1529         init_completion(&xcopy_lun->lun_ref_comp);
1530
1531         return dev;
1532 }
1533
1534 int target_configure_device(struct se_device *dev)
1535 {
1536         struct se_hba *hba = dev->se_hba;
1537         int ret;
1538
1539         if (dev->dev_flags & DF_CONFIGURED) {
1540                 pr_err("se_dev->se_dev_ptr already set for storage"
1541                                 " object\n");
1542                 return -EEXIST;
1543         }
1544
1545         ret = dev->transport->configure_device(dev);
1546         if (ret)
1547                 goto out;
1548         /*
1549          * XXX: there is not much point to have two different values here..
1550          */
1551         dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size;
1552         dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth;
1553
1554         /*
1555          * Align max_hw_sectors down to PAGE_SIZE I/O transfers
1556          */
1557         dev->dev_attrib.hw_max_sectors =
1558                 se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors,
1559                                          dev->dev_attrib.hw_block_size);
1560         dev->dev_attrib.optimal_sectors = dev->dev_attrib.hw_max_sectors;
1561
1562         dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX);
1563         dev->creation_time = get_jiffies_64();
1564
1565         ret = core_setup_alua(dev);
1566         if (ret)
1567                 goto out;
1568
1569         /*
1570          * Startup the struct se_device processing thread
1571          */
1572         dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1,
1573                                       dev->transport->name);
1574         if (!dev->tmr_wq) {
1575                 pr_err("Unable to create tmr workqueue for %s\n",
1576                         dev->transport->name);
1577                 ret = -ENOMEM;
1578                 goto out_free_alua;
1579         }
1580
1581         /*
1582          * Setup work_queue for QUEUE_FULL
1583          */
1584         INIT_WORK(&dev->qf_work_queue, target_qf_do_work);
1585
1586         /*
1587          * Preload the initial INQUIRY const values if we are doing
1588          * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI
1589          * passthrough because this is being provided by the backend LLD.
1590          */
1591         if (!(dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)) {
1592                 strncpy(&dev->t10_wwn.vendor[0], "LIO-ORG", 8);
1593                 strncpy(&dev->t10_wwn.model[0],
1594                         dev->transport->inquiry_prod, 16);
1595                 strncpy(&dev->t10_wwn.revision[0],
1596                         dev->transport->inquiry_rev, 4);
1597         }
1598
1599         scsi_dump_inquiry(dev);
1600
1601         spin_lock(&hba->device_lock);
1602         hba->dev_count++;
1603         spin_unlock(&hba->device_lock);
1604
1605         mutex_lock(&g_device_mutex);
1606         list_add_tail(&dev->g_dev_node, &g_device_list);
1607         mutex_unlock(&g_device_mutex);
1608
1609         dev->dev_flags |= DF_CONFIGURED;
1610
1611         return 0;
1612
1613 out_free_alua:
1614         core_alua_free_lu_gp_mem(dev);
1615 out:
1616         se_release_vpd_for_dev(dev);
1617         return ret;
1618 }
1619
1620 void target_free_device(struct se_device *dev)
1621 {
1622         struct se_hba *hba = dev->se_hba;
1623
1624         WARN_ON(!list_empty(&dev->dev_sep_list));
1625
1626         if (dev->dev_flags & DF_CONFIGURED) {
1627                 destroy_workqueue(dev->tmr_wq);
1628
1629                 mutex_lock(&g_device_mutex);
1630                 list_del(&dev->g_dev_node);
1631                 mutex_unlock(&g_device_mutex);
1632
1633                 spin_lock(&hba->device_lock);
1634                 hba->dev_count--;
1635                 spin_unlock(&hba->device_lock);
1636         }
1637
1638         core_alua_free_lu_gp_mem(dev);
1639         core_alua_set_lba_map(dev, NULL, 0, 0);
1640         core_scsi3_free_all_registrations(dev);
1641         se_release_vpd_for_dev(dev);
1642
1643         if (dev->transport->free_prot)
1644                 dev->transport->free_prot(dev);
1645
1646         dev->transport->free_device(dev);
1647 }
1648
1649 int core_dev_setup_virtual_lun0(void)
1650 {
1651         struct se_hba *hba;
1652         struct se_device *dev;
1653         char buf[] = "rd_pages=8,rd_nullio=1";
1654         int ret;
1655
1656         hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE);
1657         if (IS_ERR(hba))
1658                 return PTR_ERR(hba);
1659
1660         dev = target_alloc_device(hba, "virt_lun0");
1661         if (!dev) {
1662                 ret = -ENOMEM;
1663                 goto out_free_hba;
1664         }
1665
1666         hba->transport->set_configfs_dev_params(dev, buf, sizeof(buf));
1667
1668         ret = target_configure_device(dev);
1669         if (ret)
1670                 goto out_free_se_dev;
1671
1672         lun0_hba = hba;
1673         g_lun0_dev = dev;
1674         return 0;
1675
1676 out_free_se_dev:
1677         target_free_device(dev);
1678 out_free_hba:
1679         core_delete_hba(hba);
1680         return ret;
1681 }
1682
1683
1684 void core_dev_release_virtual_lun0(void)
1685 {
1686         struct se_hba *hba = lun0_hba;
1687
1688         if (!hba)
1689                 return;
1690
1691         if (g_lun0_dev)
1692                 target_free_device(g_lun0_dev);
1693         core_delete_hba(hba);
1694 }
1695
1696 /*
1697  * Common CDB parsing for kernel and user passthrough.
1698  */
1699 sense_reason_t
1700 passthrough_parse_cdb(struct se_cmd *cmd,
1701         sense_reason_t (*exec_cmd)(struct se_cmd *cmd))
1702 {
1703         unsigned char *cdb = cmd->t_task_cdb;
1704
1705         /*
1706          * Clear a lun set in the cdb if the initiator talking to use spoke
1707          * and old standards version, as we can't assume the underlying device
1708          * won't choke up on it.
1709          */
1710         switch (cdb[0]) {
1711         case READ_10: /* SBC - RDProtect */
1712         case READ_12: /* SBC - RDProtect */
1713         case READ_16: /* SBC - RDProtect */
1714         case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */
1715         case VERIFY: /* SBC - VRProtect */
1716         case VERIFY_16: /* SBC - VRProtect */
1717         case WRITE_VERIFY: /* SBC - VRProtect */
1718         case WRITE_VERIFY_12: /* SBC - VRProtect */
1719         case MAINTENANCE_IN: /* SPC - Parameter Data Format for SA RTPG */
1720                 break;
1721         default:
1722                 cdb[1] &= 0x1f; /* clear logical unit number */
1723                 break;
1724         }
1725
1726         /*
1727          * For REPORT LUNS we always need to emulate the response, for everything
1728          * else, pass it up.
1729          */
1730         if (cdb[0] == REPORT_LUNS) {
1731                 cmd->execute_cmd = spc_emulate_report_luns;
1732                 return TCM_NO_SENSE;
1733         }
1734
1735         /* Set DATA_CDB flag for ops that should have it */
1736         switch (cdb[0]) {
1737         case READ_6:
1738         case READ_10:
1739         case READ_12:
1740         case READ_16:
1741         case WRITE_6:
1742         case WRITE_10:
1743         case WRITE_12:
1744         case WRITE_16:
1745         case WRITE_VERIFY:
1746         case WRITE_VERIFY_12:
1747         case 0x8e: /* WRITE_VERIFY_16 */
1748         case COMPARE_AND_WRITE:
1749         case XDWRITEREAD_10:
1750                 cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
1751                 break;
1752         case VARIABLE_LENGTH_CMD:
1753                 switch (get_unaligned_be16(&cdb[8])) {
1754                 case READ_32:
1755                 case WRITE_32:
1756                 case 0x0c: /* WRITE_VERIFY_32 */
1757                 case XDWRITEREAD_32:
1758                         cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
1759                         break;
1760                 }
1761         }
1762
1763         cmd->execute_cmd = exec_cmd;
1764
1765         return TCM_NO_SENSE;
1766 }
1767 EXPORT_SYMBOL(passthrough_parse_cdb);