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 2003-2012 RisingTide Systems LLC.
   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 <net/sock.h>
  37 #include <net/tcp.h>
  38 #include <scsi/scsi.h>
  39 #include <scsi/scsi_device.h>
  40
  41 #include <target/target_core_base.h>
  42 #include <target/target_core_backend.h>
  43 #include <target/target_core_fabric.h>
  44
  45 #include "target_core_internal.h"
  46 #include "target_core_alua.h"
  47 #include "target_core_pr.h"
  48 #include "target_core_ua.h"
  49
  50 static struct se_hba *lun0_hba;
  51 /* not static, needed by tpg.c */
  52 struct se_device *g_lun0_dev;
  53
  54 sense_reason_t
  55 transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
  56 {
  57         struct se_lun *se_lun = NULL;
  58         struct se_session *se_sess = se_cmd->se_sess;
  59         struct se_device *dev;
  60         unsigned long flags;
  61
  62         if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG)
  63                 return TCM_NON_EXISTENT_LUN;
  64
  65         spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
  66         se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun];
  67         if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
  68                 struct se_dev_entry *deve = se_cmd->se_deve;
  69
  70                 deve->total_cmds++;
  71                 deve->total_bytes += se_cmd->data_length;
  72
  73                 if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
  74                     (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) {
  75                         pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
  76                                 " Access for 0x%08x\n",
  77                                 se_cmd->se_tfo->get_fabric_name(),
  78                                 unpacked_lun);
  79                         spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
  80                         return TCM_WRITE_PROTECTED;
  81                 }
  82
  83                 if (se_cmd->data_direction == DMA_TO_DEVICE)
  84                         deve->write_bytes += se_cmd->data_length;
  85                 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
  86                         deve->read_bytes += se_cmd->data_length;
  87
  88                 deve->deve_cmds++;
  89
  90                 se_lun = deve->se_lun;
  91                 se_cmd->se_lun = deve->se_lun;
  92                 se_cmd->pr_res_key = deve->pr_res_key;
  93                 se_cmd->orig_fe_lun = unpacked_lun;
  94                 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
  95         }
  96         spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
  97
  98         if (!se_lun) {
  99                 /*
 100                  * Use the se_portal_group->tpg_virt_lun0 to allow for
 101                  * REPORT_LUNS, et al to be returned when no active
 102                  * MappedLUN=0 exists for this Initiator Port.
 103                  */
 104                 if (unpacked_lun != 0) {
 105                         pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
 106                                 " Access for 0x%08x\n",
 107                                 se_cmd->se_tfo->get_fabric_name(),
 108                                 unpacked_lun);
 109                         return TCM_NON_EXISTENT_LUN;
 110                 }
 111                 /*
 112                  * Force WRITE PROTECT for virtual LUN 0
 113                  */
 114                 if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
 115                     (se_cmd->data_direction != DMA_NONE))
 116                         return TCM_WRITE_PROTECTED;
 117
 118                 se_lun = &se_sess->se_tpg->tpg_virt_lun0;
 119                 se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0;
 120                 se_cmd->orig_fe_lun = 0;
 121                 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
 122         }
 123
 124         /* Directly associate cmd with se_dev */
 125         se_cmd->se_dev = se_lun->lun_se_dev;
 126
 127         /* TODO: get rid of this and use atomics for stats */
 128         dev = se_lun->lun_se_dev;
 129         spin_lock_irqsave(&dev->stats_lock, flags);
 130         dev->num_cmds++;
 131         if (se_cmd->data_direction == DMA_TO_DEVICE)
 132                 dev->write_bytes += se_cmd->data_length;
 133         else if (se_cmd->data_direction == DMA_FROM_DEVICE)
 134                 dev->read_bytes += se_cmd->data_length;
 135         spin_unlock_irqrestore(&dev->stats_lock, flags);
 136
 137         spin_lock_irqsave(&se_lun->lun_cmd_lock, flags);
 138         list_add_tail(&se_cmd->se_lun_node, &se_lun->lun_cmd_list);
 139         spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags);
 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(&deve->pr_ref_count);
 229                 smp_mb__after_atomic_inc();
 230                 spin_unlock_irq(&nacl->device_list_lock);
 231
 232                 return deve;
 233         }
 234         spin_unlock_irq(&nacl->device_list_lock);
 235
 236         return NULL;
 237 }
 238
 239 int core_free_device_list_for_node(
 240         struct se_node_acl *nacl,
 241         struct se_portal_group *tpg)
 242 {
 243         struct se_dev_entry *deve;
 244         struct se_lun *lun;
 245         u32 i;
 246
 247         if (!nacl->device_list)
 248                 return 0;
 249
 250         spin_lock_irq(&nacl->device_list_lock);
 251         for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
 252                 deve = nacl->device_list[i];
 253
 254                 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
 255                         continue;
 256
 257                 if (!deve->se_lun) {
 258                         pr_err("%s device entries device pointer is"
 259                                 " NULL, but Initiator has access.\n",
 260                                 tpg->se_tpg_tfo->get_fabric_name());
 261                         continue;
 262                 }
 263                 lun = deve->se_lun;
 264
 265                 spin_unlock_irq(&nacl->device_list_lock);
 266                 core_disable_device_list_for_node(lun, NULL, deve->mapped_lun,
 267                         TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg);
 268                 spin_lock_irq(&nacl->device_list_lock);
 269         }
 270         spin_unlock_irq(&nacl->device_list_lock);
 271
 272         array_free(nacl->device_list, TRANSPORT_MAX_LUNS_PER_TPG);
 273         nacl->device_list = NULL;
 274
 275         return 0;
 276 }
 277
 278 void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd)
 279 {
 280         struct se_dev_entry *deve;
 281         unsigned long flags;
 282
 283         spin_lock_irqsave(&se_nacl->device_list_lock, flags);
 284         deve = se_nacl->device_list[se_cmd->orig_fe_lun];
 285         deve->deve_cmds--;
 286         spin_unlock_irqrestore(&se_nacl->device_list_lock, flags);
 287 }
 288
 289 void core_update_device_list_access(
 290         u32 mapped_lun,
 291         u32 lun_access,
 292         struct se_node_acl *nacl)
 293 {
 294         struct se_dev_entry *deve;
 295
 296         spin_lock_irq(&nacl->device_list_lock);
 297         deve = nacl->device_list[mapped_lun];
 298         if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
 299                 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
 300                 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
 301         } else {
 302                 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
 303                 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
 304         }
 305         spin_unlock_irq(&nacl->device_list_lock);
 306 }
 307
 308 /*      core_enable_device_list_for_node():
 309  *
 310  *
 311  */
 312 int core_enable_device_list_for_node(
 313         struct se_lun *lun,
 314         struct se_lun_acl *lun_acl,
 315         u32 mapped_lun,
 316         u32 lun_access,
 317         struct se_node_acl *nacl,
 318         struct se_portal_group *tpg)
 319 {
 320         struct se_port *port = lun->lun_sep;
 321         struct se_dev_entry *deve;
 322
 323         spin_lock_irq(&nacl->device_list_lock);
 324
 325         deve = nacl->device_list[mapped_lun];
 326
 327         /*
 328          * Check if the call is handling demo mode -> explict LUN ACL
 329          * transition.  This transition must be for the same struct se_lun
 330          * + mapped_lun that was setup in demo mode..
 331          */
 332         if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
 333                 if (deve->se_lun_acl != NULL) {
 334                         pr_err("struct se_dev_entry->se_lun_acl"
 335                                " already set for demo mode -> explict"
 336                                " LUN ACL transition\n");
 337                         spin_unlock_irq(&nacl->device_list_lock);
 338                         return -EINVAL;
 339                 }
 340                 if (deve->se_lun != lun) {
 341                         pr_err("struct se_dev_entry->se_lun does"
 342                                " match passed struct se_lun for demo mode"
 343                                " -> explict LUN ACL transition\n");
 344                         spin_unlock_irq(&nacl->device_list_lock);
 345                         return -EINVAL;
 346                 }
 347                 deve->se_lun_acl = lun_acl;
 348
 349                 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
 350                         deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
 351                         deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
 352                 } else {
 353                         deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
 354                         deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
 355                 }
 356
 357                 spin_unlock_irq(&nacl->device_list_lock);
 358                 return 0;
 359         }
 360
 361         deve->se_lun = lun;
 362         deve->se_lun_acl = lun_acl;
 363         deve->mapped_lun = mapped_lun;
 364         deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS;
 365
 366         if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
 367                 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
 368                 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
 369         } else {
 370                 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
 371                 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
 372         }
 373
 374         deve->creation_time = get_jiffies_64();
 375         deve->attach_count++;
 376         spin_unlock_irq(&nacl->device_list_lock);
 377
 378         spin_lock_bh(&port->sep_alua_lock);
 379         list_add_tail(&deve->alua_port_list, &port->sep_alua_list);
 380         spin_unlock_bh(&port->sep_alua_lock);
 381
 382         return 0;
 383 }
 384
 385 /*      core_disable_device_list_for_node():
 386  *
 387  *
 388  */
 389 int core_disable_device_list_for_node(
 390         struct se_lun *lun,
 391         struct se_lun_acl *lun_acl,
 392         u32 mapped_lun,
 393         u32 lun_access,
 394         struct se_node_acl *nacl,
 395         struct se_portal_group *tpg)
 396 {
 397         struct se_port *port = lun->lun_sep;
 398         struct se_dev_entry *deve = nacl->device_list[mapped_lun];
 399
 400         /*
 401          * If the MappedLUN entry is being disabled, the entry in
 402          * port->sep_alua_list must be removed now before clearing the
 403          * struct se_dev_entry pointers below as logic in
 404          * core_alua_do_transition_tg_pt() depends on these being present.
 405          *
 406          * deve->se_lun_acl will be NULL for demo-mode created LUNs
 407          * that have not been explicitly converted to MappedLUNs ->
 408          * struct se_lun_acl, but we remove deve->alua_port_list from
 409          * port->sep_alua_list. This also means that active UAs and
 410          * NodeACL context specific PR metadata for demo-mode
 411          * MappedLUN *deve will be released below..
 412          */
 413         spin_lock_bh(&port->sep_alua_lock);
 414         list_del(&deve->alua_port_list);
 415         spin_unlock_bh(&port->sep_alua_lock);
 416         /*
 417          * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
 418          * PR operation to complete.
 419          */
 420         while (atomic_read(&deve->pr_ref_count) != 0)
 421                 cpu_relax();
 422
 423         spin_lock_irq(&nacl->device_list_lock);
 424         /*
 425          * Disable struct se_dev_entry LUN ACL mapping
 426          */
 427         core_scsi3_ua_release_all(deve);
 428         deve->se_lun = NULL;
 429         deve->se_lun_acl = NULL;
 430         deve->lun_flags = 0;
 431         deve->creation_time = 0;
 432         deve->attach_count--;
 433         spin_unlock_irq(&nacl->device_list_lock);
 434
 435         core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl);
 436         return 0;
 437 }
 438
 439 /*      core_clear_lun_from_tpg():
 440  *
 441  *
 442  */
 443 void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
 444 {
 445         struct se_node_acl *nacl;
 446         struct se_dev_entry *deve;
 447         u32 i;
 448
 449         spin_lock_irq(&tpg->acl_node_lock);
 450         list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
 451                 spin_unlock_irq(&tpg->acl_node_lock);
 452
 453                 spin_lock_irq(&nacl->device_list_lock);
 454                 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
 455                         deve = nacl->device_list[i];
 456                         if (lun != deve->se_lun)
 457                                 continue;
 458                         spin_unlock_irq(&nacl->device_list_lock);
 459
 460                         core_disable_device_list_for_node(lun, NULL,
 461                                 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS,
 462                                 nacl, tpg);
 463
 464                         spin_lock_irq(&nacl->device_list_lock);
 465                 }
 466                 spin_unlock_irq(&nacl->device_list_lock);
 467
 468                 spin_lock_irq(&tpg->acl_node_lock);
 469         }
 470         spin_unlock_irq(&tpg->acl_node_lock);
 471 }
 472
 473 static struct se_port *core_alloc_port(struct se_device *dev)
 474 {
 475         struct se_port *port, *port_tmp;
 476
 477         port = kzalloc(sizeof(struct se_port), GFP_KERNEL);
 478         if (!port) {
 479                 pr_err("Unable to allocate struct se_port\n");
 480                 return ERR_PTR(-ENOMEM);
 481         }
 482         INIT_LIST_HEAD(&port->sep_alua_list);
 483         INIT_LIST_HEAD(&port->sep_list);
 484         atomic_set(&port->sep_tg_pt_secondary_offline, 0);
 485         spin_lock_init(&port->sep_alua_lock);
 486         mutex_init(&port->sep_tg_pt_md_mutex);
 487
 488         spin_lock(&dev->se_port_lock);
 489         if (dev->dev_port_count == 0x0000ffff) {
 490                 pr_warn("Reached dev->dev_port_count =="
 491                                 " 0x0000ffff\n");
 492                 spin_unlock(&dev->se_port_lock);
 493                 return ERR_PTR(-ENOSPC);
 494         }
 495 again:
 496         /*
 497          * Allocate the next RELATIVE TARGET PORT IDENTIFIER for this struct se_device
 498          * Here is the table from spc4r17 section 7.7.3.8.
 499          *
 500          *    Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
 501          *
 502          * Code      Description
 503          * 0h        Reserved
 504          * 1h        Relative port 1, historically known as port A
 505          * 2h        Relative port 2, historically known as port B
 506          * 3h to FFFFh    Relative port 3 through 65 535
 507          */
 508         port->sep_rtpi = dev->dev_rpti_counter++;
 509         if (!port->sep_rtpi)
 510                 goto again;
 511
 512         list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) {
 513                 /*
 514                  * Make sure RELATIVE TARGET PORT IDENTIFIER is unique
 515                  * for 16-bit wrap..
 516                  */
 517                 if (port->sep_rtpi == port_tmp->sep_rtpi)
 518                         goto again;
 519         }
 520         spin_unlock(&dev->se_port_lock);
 521
 522         return port;
 523 }
 524
 525 static void core_export_port(
 526         struct se_device *dev,
 527         struct se_portal_group *tpg,
 528         struct se_port *port,
 529         struct se_lun *lun)
 530 {
 531         struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL;
 532
 533         spin_lock(&dev->se_port_lock);
 534         spin_lock(&lun->lun_sep_lock);
 535         port->sep_tpg = tpg;
 536         port->sep_lun = lun;
 537         lun->lun_sep = port;
 538         spin_unlock(&lun->lun_sep_lock);
 539
 540         list_add_tail(&port->sep_list, &dev->dev_sep_list);
 541         spin_unlock(&dev->se_port_lock);
 542
 543         if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV &&
 544             !(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) {
 545                 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port);
 546                 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) {
 547                         pr_err("Unable to allocate t10_alua_tg_pt"
 548                                         "_gp_member_t\n");
 549                         return;
 550                 }
 551                 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
 552                 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
 553                         dev->t10_alua.default_tg_pt_gp);
 554                 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
 555                 pr_debug("%s/%s: Adding to default ALUA Target Port"
 556                         " Group: alua/default_tg_pt_gp\n",
 557                         dev->transport->name, tpg->se_tpg_tfo->get_fabric_name());
 558         }
 559
 560         dev->dev_port_count++;
 561         port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFIER */
 562 }
 563
 564 /*
 565  *      Called with struct se_device->se_port_lock spinlock held.
 566  */
 567 static void core_release_port(struct se_device *dev, struct se_port *port)
 568         __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock)
 569 {
 570         /*
 571          * Wait for any port reference for PR ALL_TG_PT=1 operation
 572          * to complete in __core_scsi3_alloc_registration()
 573          */
 574         spin_unlock(&dev->se_port_lock);
 575         if (atomic_read(&port->sep_tg_pt_ref_cnt))
 576                 cpu_relax();
 577         spin_lock(&dev->se_port_lock);
 578
 579         core_alua_free_tg_pt_gp_mem(port);
 580
 581         list_del(&port->sep_list);
 582         dev->dev_port_count--;
 583         kfree(port);
 584 }
 585
 586 int core_dev_export(
 587         struct se_device *dev,
 588         struct se_portal_group *tpg,
 589         struct se_lun *lun)
 590 {
 591         struct se_hba *hba = dev->se_hba;
 592         struct se_port *port;
 593
 594         port = core_alloc_port(dev);
 595         if (IS_ERR(port))
 596                 return PTR_ERR(port);
 597
 598         lun->lun_se_dev = dev;
 599
 600         spin_lock(&hba->device_lock);
 601         dev->export_count++;
 602         spin_unlock(&hba->device_lock);
 603
 604         core_export_port(dev, tpg, port, lun);
 605         return 0;
 606 }
 607
 608 void core_dev_unexport(
 609         struct se_device *dev,
 610         struct se_portal_group *tpg,
 611         struct se_lun *lun)
 612 {
 613         struct se_hba *hba = dev->se_hba;
 614         struct se_port *port = lun->lun_sep;
 615
 616         spin_lock(&lun->lun_sep_lock);
 617         if (lun->lun_se_dev == NULL) {
 618                 spin_unlock(&lun->lun_sep_lock);
 619                 return;
 620         }
 621         spin_unlock(&lun->lun_sep_lock);
 622
 623         spin_lock(&dev->se_port_lock);
 624         core_release_port(dev, port);
 625         spin_unlock(&dev->se_port_lock);
 626
 627         spin_lock(&hba->device_lock);
 628         dev->export_count--;
 629         spin_unlock(&hba->device_lock);
 630
 631         lun->lun_se_dev = NULL;
 632 }
 633
 634 static void se_release_vpd_for_dev(struct se_device *dev)
 635 {
 636         struct t10_vpd *vpd, *vpd_tmp;
 637
 638         spin_lock(&dev->t10_wwn.t10_vpd_lock);
 639         list_for_each_entry_safe(vpd, vpd_tmp,
 640                         &dev->t10_wwn.t10_vpd_list, vpd_list) {
 641                 list_del(&vpd->vpd_list);
 642                 kfree(vpd);
 643         }
 644         spin_unlock(&dev->t10_wwn.t10_vpd_lock);
 645 }
 646
 647 static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size)
 648 {
 649         u32 aligned_max_sectors;
 650         u32 alignment;
 651         /*
 652          * Limit max_sectors to a PAGE_SIZE aligned value for modern
 653          * transport_allocate_data_tasks() operation.
 654          */
 655         alignment = max(1ul, PAGE_SIZE / block_size);
 656         aligned_max_sectors = rounddown(max_sectors, alignment);
 657
 658         if (max_sectors != aligned_max_sectors)
 659                 pr_info("Rounding down aligned max_sectors from %u to %u\n",
 660                         max_sectors, aligned_max_sectors);
 661
 662         return aligned_max_sectors;
 663 }
 664
 665 int se_dev_set_max_unmap_lba_count(
 666         struct se_device *dev,
 667         u32 max_unmap_lba_count)
 668 {
 669         dev->dev_attrib.max_unmap_lba_count = max_unmap_lba_count;
 670         pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n",
 671                         dev, dev->dev_attrib.max_unmap_lba_count);
 672         return 0;
 673 }
 674
 675 int se_dev_set_max_unmap_block_desc_count(
 676         struct se_device *dev,
 677         u32 max_unmap_block_desc_count)
 678 {
 679         dev->dev_attrib.max_unmap_block_desc_count =
 680                 max_unmap_block_desc_count;
 681         pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n",
 682                         dev, dev->dev_attrib.max_unmap_block_desc_count);
 683         return 0;
 684 }
 685
 686 int se_dev_set_unmap_granularity(
 687         struct se_device *dev,
 688         u32 unmap_granularity)
 689 {
 690         dev->dev_attrib.unmap_granularity = unmap_granularity;
 691         pr_debug("dev[%p]: Set unmap_granularity: %u\n",
 692                         dev, dev->dev_attrib.unmap_granularity);
 693         return 0;
 694 }
 695
 696 int se_dev_set_unmap_granularity_alignment(
 697         struct se_device *dev,
 698         u32 unmap_granularity_alignment)
 699 {
 700         dev->dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment;
 701         pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n",
 702                         dev, dev->dev_attrib.unmap_granularity_alignment);
 703         return 0;
 704 }
 705
 706 int se_dev_set_max_write_same_len(
 707         struct se_device *dev,
 708         u32 max_write_same_len)
 709 {
 710         dev->dev_attrib.max_write_same_len = max_write_same_len;
 711         pr_debug("dev[%p]: Set max_write_same_len: %u\n",
 712                         dev, dev->dev_attrib.max_write_same_len);
 713         return 0;
 714 }
 715
 716 int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
 717 {
 718         if (flag != 0 && flag != 1) {
 719                 pr_err("Illegal value %d\n", flag);
 720                 return -EINVAL;
 721         }
 722
 723         if (flag) {
 724                 pr_err("dpo_emulated not supported\n");
 725                 return -EINVAL;
 726         }
 727
 728         return 0;
 729 }
 730
 731 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
 732 {
 733         if (flag != 0 && flag != 1) {
 734                 pr_err("Illegal value %d\n", flag);
 735                 return -EINVAL;
 736         }
 737
 738         if (flag &&
 739             dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
 740                 pr_err("emulate_fua_write not supported for pSCSI\n");
 741                 return -EINVAL;
 742         }
 743         dev->dev_attrib.emulate_fua_write = flag;
 744         pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
 745                         dev, dev->dev_attrib.emulate_fua_write);
 746         return 0;
 747 }
 748
 749 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
 750 {
 751         if (flag != 0 && flag != 1) {
 752                 pr_err("Illegal value %d\n", flag);
 753                 return -EINVAL;
 754         }
 755
 756         if (flag) {
 757                 pr_err("ua read emulated not supported\n");
 758                 return -EINVAL;
 759         }
 760
 761         return 0;
 762 }
 763
 764 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
 765 {
 766         if (flag != 0 && flag != 1) {
 767                 pr_err("Illegal value %d\n", flag);
 768                 return -EINVAL;
 769         }
 770         if (flag &&
 771             dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
 772                 pr_err("emulate_write_cache not supported for pSCSI\n");
 773                 return -EINVAL;
 774         }
 775         dev->dev_attrib.emulate_write_cache = flag;
 776         pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
 777                         dev, dev->dev_attrib.emulate_write_cache);
 778         return 0;
 779 }
 780
 781 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
 782 {
 783         if ((flag != 0) && (flag != 1) && (flag != 2)) {
 784                 pr_err("Illegal value %d\n", flag);
 785                 return -EINVAL;
 786         }
 787
 788         if (dev->export_count) {
 789                 pr_err("dev[%p]: Unable to change SE Device"
 790                         " UA_INTRLCK_CTRL while export_count is %d\n",
 791                         dev, dev->export_count);
 792                 return -EINVAL;
 793         }
 794         dev->dev_attrib.emulate_ua_intlck_ctrl = flag;
 795         pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
 796                 dev, dev->dev_attrib.emulate_ua_intlck_ctrl);
 797
 798         return 0;
 799 }
 800
 801 int se_dev_set_emulate_tas(struct se_device *dev, int flag)
 802 {
 803         if ((flag != 0) && (flag != 1)) {
 804                 pr_err("Illegal value %d\n", flag);
 805                 return -EINVAL;
 806         }
 807
 808         if (dev->export_count) {
 809                 pr_err("dev[%p]: Unable to change SE Device TAS while"
 810                         " export_count is %d\n",
 811                         dev, dev->export_count);
 812                 return -EINVAL;
 813         }
 814         dev->dev_attrib.emulate_tas = flag;
 815         pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
 816                 dev, (dev->dev_attrib.emulate_tas) ? "Enabled" : "Disabled");
 817
 818         return 0;
 819 }
 820
 821 int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
 822 {
 823         if ((flag != 0) && (flag != 1)) {
 824                 pr_err("Illegal value %d\n", flag);
 825                 return -EINVAL;
 826         }
 827         /*
 828          * We expect this value to be non-zero when generic Block Layer
 829          * Discard supported is detected iblock_create_virtdevice().
 830          */
 831         if (flag && !dev->dev_attrib.max_unmap_block_desc_count) {
 832                 pr_err("Generic Block Discard not supported\n");
 833                 return -ENOSYS;
 834         }
 835
 836         dev->dev_attrib.emulate_tpu = flag;
 837         pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
 838                                 dev, flag);
 839         return 0;
 840 }
 841
 842 int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
 843 {
 844         if ((flag != 0) && (flag != 1)) {
 845                 pr_err("Illegal value %d\n", flag);
 846                 return -EINVAL;
 847         }
 848         /*
 849          * We expect this value to be non-zero when generic Block Layer
 850          * Discard supported is detected iblock_create_virtdevice().
 851          */
 852         if (flag && !dev->dev_attrib.max_unmap_block_desc_count) {
 853                 pr_err("Generic Block Discard not supported\n");
 854                 return -ENOSYS;
 855         }
 856
 857         dev->dev_attrib.emulate_tpws = flag;
 858         pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
 859                                 dev, flag);
 860         return 0;
 861 }
 862
 863 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
 864 {
 865         if ((flag != 0) && (flag != 1)) {
 866                 pr_err("Illegal value %d\n", flag);
 867                 return -EINVAL;
 868         }
 869         dev->dev_attrib.enforce_pr_isids = flag;
 870         pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
 871                 (dev->dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled");
 872         return 0;
 873 }
 874
 875 int se_dev_set_is_nonrot(struct se_device *dev, int flag)
 876 {
 877         if ((flag != 0) && (flag != 1)) {
 878                 printk(KERN_ERR "Illegal value %d\n", flag);
 879                 return -EINVAL;
 880         }
 881         dev->dev_attrib.is_nonrot = flag;
 882         pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n",
 883                dev, flag);
 884         return 0;
 885 }
 886
 887 int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag)
 888 {
 889         if (flag != 0) {
 890                 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted"
 891                         " reordering not implemented\n", dev);
 892                 return -ENOSYS;
 893         }
 894         dev->dev_attrib.emulate_rest_reord = flag;
 895         pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag);
 896         return 0;
 897 }
 898
 899 /*
 900  * Note, this can only be called on unexported SE Device Object.
 901  */
 902 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
 903 {
 904         if (dev->export_count) {
 905                 pr_err("dev[%p]: Unable to change SE Device TCQ while"
 906                         " export_count is %d\n",
 907                         dev, dev->export_count);
 908                 return -EINVAL;
 909         }
 910         if (!queue_depth) {
 911                 pr_err("dev[%p]: Illegal ZERO value for queue"
 912                         "_depth\n", dev);
 913                 return -EINVAL;
 914         }
 915
 916         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
 917                 if (queue_depth > dev->dev_attrib.hw_queue_depth) {
 918                         pr_err("dev[%p]: Passed queue_depth: %u"
 919                                 " exceeds TCM/SE_Device TCQ: %u\n",
 920                                 dev, queue_depth,
 921                                 dev->dev_attrib.hw_queue_depth);
 922                         return -EINVAL;
 923                 }
 924         } else {
 925                 if (queue_depth > dev->dev_attrib.queue_depth) {
 926                         if (queue_depth > dev->dev_attrib.hw_queue_depth) {
 927                                 pr_err("dev[%p]: Passed queue_depth:"
 928                                         " %u exceeds TCM/SE_Device MAX"
 929                                         " TCQ: %u\n", dev, queue_depth,
 930                                         dev->dev_attrib.hw_queue_depth);
 931                                 return -EINVAL;
 932                         }
 933                 }
 934         }
 935
 936         dev->dev_attrib.queue_depth = dev->queue_depth = queue_depth;
 937         pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n",
 938                         dev, queue_depth);
 939         return 0;
 940 }
 941
 942 int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors)
 943 {
 944         int block_size = dev->dev_attrib.block_size;
 945
 946         if (dev->export_count) {
 947                 pr_err("dev[%p]: Unable to change SE Device"
 948                         " fabric_max_sectors while export_count is %d\n",
 949                         dev, dev->export_count);
 950                 return -EINVAL;
 951         }
 952         if (!fabric_max_sectors) {
 953                 pr_err("dev[%p]: Illegal ZERO value for"
 954                         " fabric_max_sectors\n", dev);
 955                 return -EINVAL;
 956         }
 957         if (fabric_max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
 958                 pr_err("dev[%p]: Passed fabric_max_sectors: %u less than"
 959                         " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, fabric_max_sectors,
 960                                 DA_STATUS_MAX_SECTORS_MIN);
 961                 return -EINVAL;
 962         }
 963         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
 964                 if (fabric_max_sectors > dev->dev_attrib.hw_max_sectors) {
 965                         pr_err("dev[%p]: Passed fabric_max_sectors: %u"
 966                                 " greater than TCM/SE_Device max_sectors:"
 967                                 " %u\n", dev, fabric_max_sectors,
 968                                 dev->dev_attrib.hw_max_sectors);
 969                          return -EINVAL;
 970                 }
 971         } else {
 972                 if (fabric_max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
 973                         pr_err("dev[%p]: Passed fabric_max_sectors: %u"
 974                                 " greater than DA_STATUS_MAX_SECTORS_MAX:"
 975                                 " %u\n", dev, fabric_max_sectors,
 976                                 DA_STATUS_MAX_SECTORS_MAX);
 977                         return -EINVAL;
 978                 }
 979         }
 980         /*
 981          * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
 982          */
 983         if (!block_size) {
 984                 block_size = 512;
 985                 pr_warn("Defaulting to 512 for zero block_size\n");
 986         }
 987         fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors,
 988                                                       block_size);
 989
 990         dev->dev_attrib.fabric_max_sectors = fabric_max_sectors;
 991         pr_debug("dev[%p]: SE Device max_sectors changed to %u\n",
 992                         dev, fabric_max_sectors);
 993         return 0;
 994 }
 995
 996 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
 997 {
 998         if (dev->export_count) {
 999                 pr_err("dev[%p]: Unable to change SE Device"
1000                         " optimal_sectors while export_count is %d\n",
1001                         dev, dev->export_count);
1002                 return -EINVAL;
1003         }
1004         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1005                 pr_err("dev[%p]: Passed optimal_sectors cannot be"
1006                                 " changed for TCM/pSCSI\n", dev);
1007                 return -EINVAL;
1008         }
1009         if (optimal_sectors > dev->dev_attrib.fabric_max_sectors) {
1010                 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1011                         " greater than fabric_max_sectors: %u\n", dev,
1012                         optimal_sectors, dev->dev_attrib.fabric_max_sectors);
1013                 return -EINVAL;
1014         }
1015
1016         dev->dev_attrib.optimal_sectors = optimal_sectors;
1017         pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1018                         dev, optimal_sectors);
1019         return 0;
1020 }
1021
1022 int se_dev_set_block_size(struct se_device *dev, u32 block_size)
1023 {
1024         if (dev->export_count) {
1025                 pr_err("dev[%p]: Unable to change SE Device block_size"
1026                         " while export_count is %d\n",
1027                         dev, dev->export_count);
1028                 return -EINVAL;
1029         }
1030
1031         if ((block_size != 512) &&
1032             (block_size != 1024) &&
1033             (block_size != 2048) &&
1034             (block_size != 4096)) {
1035                 pr_err("dev[%p]: Illegal value for block_device: %u"
1036                         " for SE device, must be 512, 1024, 2048 or 4096\n",
1037                         dev, block_size);
1038                 return -EINVAL;
1039         }
1040
1041         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1042                 pr_err("dev[%p]: Not allowed to change block_size for"
1043                         " Physical Device, use for Linux/SCSI to change"
1044                         " block_size for underlying hardware\n", dev);
1045                 return -EINVAL;
1046         }
1047
1048         dev->dev_attrib.block_size = block_size;
1049         pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1050                         dev, block_size);
1051         return 0;
1052 }
1053
1054 struct se_lun *core_dev_add_lun(
1055         struct se_portal_group *tpg,
1056         struct se_device *dev,
1057         u32 lun)
1058 {
1059         struct se_lun *lun_p;
1060         int rc;
1061
1062         lun_p = core_tpg_pre_addlun(tpg, lun);
1063         if (IS_ERR(lun_p))
1064                 return lun_p;
1065
1066         rc = core_tpg_post_addlun(tpg, lun_p,
1067                                 TRANSPORT_LUNFLAGS_READ_WRITE, dev);
1068         if (rc < 0)
1069                 return ERR_PTR(rc);
1070
1071         pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
1072                 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1073                 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun_p->unpacked_lun,
1074                 tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id);
1075         /*
1076          * Update LUN maps for dynamically added initiators when
1077          * generate_node_acl is enabled.
1078          */
1079         if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) {
1080                 struct se_node_acl *acl;
1081                 spin_lock_irq(&tpg->acl_node_lock);
1082                 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
1083                         if (acl->dynamic_node_acl &&
1084                             (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only ||
1085                              !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) {
1086                                 spin_unlock_irq(&tpg->acl_node_lock);
1087                                 core_tpg_add_node_to_devs(acl, tpg);
1088                                 spin_lock_irq(&tpg->acl_node_lock);
1089                         }
1090                 }
1091                 spin_unlock_irq(&tpg->acl_node_lock);
1092         }
1093
1094         return lun_p;
1095 }
1096
1097 /*      core_dev_del_lun():
1098  *
1099  *
1100  */
1101 int core_dev_del_lun(
1102         struct se_portal_group *tpg,
1103         u32 unpacked_lun)
1104 {
1105         struct se_lun *lun;
1106
1107         lun = core_tpg_pre_dellun(tpg, unpacked_lun);
1108         if (IS_ERR(lun))
1109                 return PTR_ERR(lun);
1110
1111         core_tpg_post_dellun(tpg, lun);
1112
1113         pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from"
1114                 " device object\n", tpg->se_tpg_tfo->get_fabric_name(),
1115                 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun,
1116                 tpg->se_tpg_tfo->get_fabric_name());
1117
1118         return 0;
1119 }
1120
1121 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
1122 {
1123         struct se_lun *lun;
1124
1125         spin_lock(&tpg->tpg_lun_lock);
1126         if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1127                 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
1128                         "_PER_TPG-1: %u for Target Portal Group: %hu\n",
1129                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1130                         TRANSPORT_MAX_LUNS_PER_TPG-1,
1131                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
1132                 spin_unlock(&tpg->tpg_lun_lock);
1133                 return NULL;
1134         }
1135         lun = tpg->tpg_lun_list[unpacked_lun];
1136
1137         if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
1138                 pr_err("%s Logical Unit Number: %u is not free on"
1139                         " Target Portal Group: %hu, ignoring request.\n",
1140                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1141                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
1142                 spin_unlock(&tpg->tpg_lun_lock);
1143                 return NULL;
1144         }
1145         spin_unlock(&tpg->tpg_lun_lock);
1146
1147         return lun;
1148 }
1149
1150 /*      core_dev_get_lun():
1151  *
1152  *
1153  */
1154 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
1155 {
1156         struct se_lun *lun;
1157
1158         spin_lock(&tpg->tpg_lun_lock);
1159         if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1160                 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
1161                         "_TPG-1: %u for Target Portal Group: %hu\n",
1162                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1163                         TRANSPORT_MAX_LUNS_PER_TPG-1,
1164                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
1165                 spin_unlock(&tpg->tpg_lun_lock);
1166                 return NULL;
1167         }
1168         lun = tpg->tpg_lun_list[unpacked_lun];
1169
1170         if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
1171                 pr_err("%s Logical Unit Number: %u is not active on"
1172                         " Target Portal Group: %hu, ignoring request.\n",
1173                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1174                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
1175                 spin_unlock(&tpg->tpg_lun_lock);
1176                 return NULL;
1177         }
1178         spin_unlock(&tpg->tpg_lun_lock);
1179
1180         return lun;
1181 }
1182
1183 struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
1184         struct se_portal_group *tpg,
1185         u32 mapped_lun,
1186         char *initiatorname,
1187         int *ret)
1188 {
1189         struct se_lun_acl *lacl;
1190         struct se_node_acl *nacl;
1191
1192         if (strlen(initiatorname) >= TRANSPORT_IQN_LEN) {
1193                 pr_err("%s InitiatorName exceeds maximum size.\n",
1194                         tpg->se_tpg_tfo->get_fabric_name());
1195                 *ret = -EOVERFLOW;
1196                 return NULL;
1197         }
1198         nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
1199         if (!nacl) {
1200                 *ret = -EINVAL;
1201                 return NULL;
1202         }
1203         lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
1204         if (!lacl) {
1205                 pr_err("Unable to allocate memory for struct se_lun_acl.\n");
1206                 *ret = -ENOMEM;
1207                 return NULL;
1208         }
1209
1210         INIT_LIST_HEAD(&lacl->lacl_list);
1211         lacl->mapped_lun = mapped_lun;
1212         lacl->se_lun_nacl = nacl;
1213         snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
1214
1215         return lacl;
1216 }
1217
1218 int core_dev_add_initiator_node_lun_acl(
1219         struct se_portal_group *tpg,
1220         struct se_lun_acl *lacl,
1221         u32 unpacked_lun,
1222         u32 lun_access)
1223 {
1224         struct se_lun *lun;
1225         struct se_node_acl *nacl;
1226
1227         lun = core_dev_get_lun(tpg, unpacked_lun);
1228         if (!lun) {
1229                 pr_err("%s Logical Unit Number: %u is not active on"
1230                         " Target Portal Group: %hu, ignoring request.\n",
1231                         tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1232                         tpg->se_tpg_tfo->tpg_get_tag(tpg));
1233                 return -EINVAL;
1234         }
1235
1236         nacl = lacl->se_lun_nacl;
1237         if (!nacl)
1238                 return -EINVAL;
1239
1240         if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
1241             (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
1242                 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1243
1244         lacl->se_lun = lun;
1245
1246         if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun,
1247                         lun_access, nacl, tpg) < 0)
1248                 return -EINVAL;
1249
1250         spin_lock(&lun->lun_acl_lock);
1251         list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
1252         atomic_inc(&lun->lun_acl_count);
1253         smp_mb__after_atomic_inc();
1254         spin_unlock(&lun->lun_acl_lock);
1255
1256         pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
1257                 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
1258                 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
1259                 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
1260                 lacl->initiatorname);
1261         /*
1262          * Check to see if there are any existing persistent reservation APTPL
1263          * pre-registrations that need to be enabled for this LUN ACL..
1264          */
1265         core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl);
1266         return 0;
1267 }
1268
1269 /*      core_dev_del_initiator_node_lun_acl():
1270  *
1271  *
1272  */
1273 int core_dev_del_initiator_node_lun_acl(
1274         struct se_portal_group *tpg,
1275         struct se_lun *lun,
1276         struct se_lun_acl *lacl)
1277 {
1278         struct se_node_acl *nacl;
1279
1280         nacl = lacl->se_lun_nacl;
1281         if (!nacl)
1282                 return -EINVAL;
1283
1284         spin_lock(&lun->lun_acl_lock);
1285         list_del(&lacl->lacl_list);
1286         atomic_dec(&lun->lun_acl_count);
1287         smp_mb__after_atomic_dec();
1288         spin_unlock(&lun->lun_acl_lock);
1289
1290         core_disable_device_list_for_node(lun, NULL, lacl->mapped_lun,
1291                 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg);
1292
1293         lacl->se_lun = NULL;
1294
1295         pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for"
1296                 " InitiatorNode: %s Mapped LUN: %u\n",
1297                 tpg->se_tpg_tfo->get_fabric_name(),
1298                 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
1299                 lacl->initiatorname, lacl->mapped_lun);
1300
1301         return 0;
1302 }
1303
1304 void core_dev_free_initiator_node_lun_acl(
1305         struct se_portal_group *tpg,
1306         struct se_lun_acl *lacl)
1307 {
1308         pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
1309                 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1310                 tpg->se_tpg_tfo->tpg_get_tag(tpg),
1311                 tpg->se_tpg_tfo->get_fabric_name(),
1312                 lacl->initiatorname, lacl->mapped_lun);
1313
1314         kfree(lacl);
1315 }
1316
1317 static void scsi_dump_inquiry(struct se_device *dev)
1318 {
1319         struct t10_wwn *wwn = &dev->t10_wwn;
1320         char buf[17];
1321         int i, device_type;
1322         /*
1323          * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer
1324          */
1325         for (i = 0; i < 8; i++)
1326                 if (wwn->vendor[i] >= 0x20)
1327                         buf[i] = wwn->vendor[i];
1328                 else
1329                         buf[i] = ' ';
1330         buf[i] = '\0';
1331         pr_debug("  Vendor: %s\n", buf);
1332
1333         for (i = 0; i < 16; i++)
1334                 if (wwn->model[i] >= 0x20)
1335                         buf[i] = wwn->model[i];
1336                 else
1337                         buf[i] = ' ';
1338         buf[i] = '\0';
1339         pr_debug("  Model: %s\n", buf);
1340
1341         for (i = 0; i < 4; i++)
1342                 if (wwn->revision[i] >= 0x20)
1343                         buf[i] = wwn->revision[i];
1344                 else
1345                         buf[i] = ' ';
1346         buf[i] = '\0';
1347         pr_debug("  Revision: %s\n", buf);
1348
1349         device_type = dev->transport->get_device_type(dev);
1350         pr_debug("  Type:   %s ", scsi_device_type(device_type));
1351 }
1352
1353 struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
1354 {
1355         struct se_device *dev;
1356
1357         dev = hba->transport->alloc_device(hba, name);
1358         if (!dev)
1359                 return NULL;
1360
1361         dev->dev_link_magic = SE_DEV_LINK_MAGIC;
1362         dev->se_hba = hba;
1363         dev->transport = hba->transport;
1364
1365         INIT_LIST_HEAD(&dev->dev_list);
1366         INIT_LIST_HEAD(&dev->dev_sep_list);
1367         INIT_LIST_HEAD(&dev->dev_tmr_list);
1368         INIT_LIST_HEAD(&dev->delayed_cmd_list);
1369         INIT_LIST_HEAD(&dev->state_list);
1370         INIT_LIST_HEAD(&dev->qf_cmd_list);
1371         spin_lock_init(&dev->stats_lock);
1372         spin_lock_init(&dev->execute_task_lock);
1373         spin_lock_init(&dev->delayed_cmd_lock);
1374         spin_lock_init(&dev->dev_reservation_lock);
1375         spin_lock_init(&dev->se_port_lock);
1376         spin_lock_init(&dev->se_tmr_lock);
1377         spin_lock_init(&dev->qf_cmd_lock);
1378         atomic_set(&dev->dev_ordered_id, 0);
1379         INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list);
1380         spin_lock_init(&dev->t10_wwn.t10_vpd_lock);
1381         INIT_LIST_HEAD(&dev->t10_pr.registration_list);
1382         INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list);
1383         spin_lock_init(&dev->t10_pr.registration_lock);
1384         spin_lock_init(&dev->t10_pr.aptpl_reg_lock);
1385         INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list);
1386         spin_lock_init(&dev->t10_alua.tg_pt_gps_lock);
1387
1388         dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
1389         dev->t10_wwn.t10_dev = dev;
1390         dev->t10_alua.t10_dev = dev;
1391
1392         dev->dev_attrib.da_dev = dev;
1393         dev->dev_attrib.emulate_dpo = DA_EMULATE_DPO;
1394         dev->dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE;
1395         dev->dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ;
1396         dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
1397         dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
1398         dev->dev_attrib.emulate_tas = DA_EMULATE_TAS;
1399         dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU;
1400         dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
1401         dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
1402         dev->dev_attrib.is_nonrot = DA_IS_NONROT;
1403         dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
1404         dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
1405         dev->dev_attrib.max_unmap_block_desc_count =
1406                 DA_MAX_UNMAP_BLOCK_DESC_COUNT;
1407         dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
1408         dev->dev_attrib.unmap_granularity_alignment =
1409                                 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
1410         dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN;
1411         dev->dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS;
1412         dev->dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS;
1413
1414         return dev;
1415 }
1416
1417 int target_configure_device(struct se_device *dev)
1418 {
1419         struct se_hba *hba = dev->se_hba;
1420         int ret;
1421
1422         if (dev->dev_flags & DF_CONFIGURED) {
1423                 pr_err("se_dev->se_dev_ptr already set for storage"
1424                                 " object\n");
1425                 return -EEXIST;
1426         }
1427
1428         ret = dev->transport->configure_device(dev);
1429         if (ret)
1430                 goto out;
1431         dev->dev_flags |= DF_CONFIGURED;
1432
1433         /*
1434          * XXX: there is not much point to have two different values here..
1435          */
1436         dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size;
1437         dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth;
1438
1439         /*
1440          * Align max_hw_sectors down to PAGE_SIZE I/O transfers
1441          */
1442         dev->dev_attrib.hw_max_sectors =
1443                 se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors,
1444                                          dev->dev_attrib.hw_block_size);
1445
1446         dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX);
1447         dev->creation_time = get_jiffies_64();
1448
1449         ret = core_setup_alua(dev);
1450         if (ret)
1451                 goto out;
1452
1453         /*
1454          * Startup the struct se_device processing thread
1455          */
1456         dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1,
1457                                       dev->transport->name);
1458         if (!dev->tmr_wq) {
1459                 pr_err("Unable to create tmr workqueue for %s\n",
1460                         dev->transport->name);
1461                 ret = -ENOMEM;
1462                 goto out_free_alua;
1463         }
1464
1465         /*
1466          * Setup work_queue for QUEUE_FULL
1467          */
1468         INIT_WORK(&dev->qf_work_queue, target_qf_do_work);
1469
1470         /*
1471          * Preload the initial INQUIRY const values if we are doing
1472          * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI
1473          * passthrough because this is being provided by the backend LLD.
1474          */
1475         if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) {
1476                 strncpy(&dev->t10_wwn.vendor[0], "LIO-ORG", 8);
1477                 strncpy(&dev->t10_wwn.model[0],
1478                         dev->transport->inquiry_prod, 16);
1479                 strncpy(&dev->t10_wwn.revision[0],
1480                         dev->transport->inquiry_rev, 4);
1481         }
1482
1483         scsi_dump_inquiry(dev);
1484
1485         spin_lock(&hba->device_lock);
1486         hba->dev_count++;
1487         spin_unlock(&hba->device_lock);
1488         return 0;
1489
1490 out_free_alua:
1491         core_alua_free_lu_gp_mem(dev);
1492 out:
1493         se_release_vpd_for_dev(dev);
1494         return ret;
1495 }
1496
1497 void target_free_device(struct se_device *dev)
1498 {
1499         struct se_hba *hba = dev->se_hba;
1500
1501         WARN_ON(!list_empty(&dev->dev_sep_list));
1502
1503         if (dev->dev_flags & DF_CONFIGURED) {
1504                 destroy_workqueue(dev->tmr_wq);
1505
1506                 spin_lock(&hba->device_lock);
1507                 hba->dev_count--;
1508                 spin_unlock(&hba->device_lock);
1509         }
1510
1511         core_alua_free_lu_gp_mem(dev);
1512         core_scsi3_free_all_registrations(dev);
1513         se_release_vpd_for_dev(dev);
1514
1515         dev->transport->free_device(dev);
1516 }
1517
1518 int core_dev_setup_virtual_lun0(void)
1519 {
1520         struct se_hba *hba;
1521         struct se_device *dev;
1522         char buf[16];
1523         int ret;
1524
1525         hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE);
1526         if (IS_ERR(hba))
1527                 return PTR_ERR(hba);
1528
1529         dev = target_alloc_device(hba, "virt_lun0");
1530         if (!dev) {
1531                 ret = -ENOMEM;
1532                 goto out_free_hba;
1533         }
1534
1535         memset(buf, 0, 16);
1536         sprintf(buf, "rd_pages=8");
1537         hba->transport->set_configfs_dev_params(dev, buf, sizeof(buf));
1538
1539         ret = target_configure_device(dev);
1540         if (ret)
1541                 goto out_free_se_dev;
1542
1543         lun0_hba = hba;
1544         g_lun0_dev = dev;
1545         return 0;
1546
1547 out_free_se_dev:
1548         target_free_device(dev);
1549 out_free_hba:
1550         core_delete_hba(hba);
1551         return ret;
1552 }
1553
1554
1555 void core_dev_release_virtual_lun0(void)
1556 {
1557         struct se_hba *hba = lun0_hba;
1558
1559         if (!hba)
1560                 return;
1561
1562         if (g_lun0_dev)
1563                 target_free_device(g_lun0_dev);
1564         core_delete_hba(hba);
1565 }