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 <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 DEFINE_MUTEX(g_device_mutex); 51 LIST_HEAD(g_device_list); 52 53 static struct se_hba *lun0_hba; 54 /* not static, needed by tpg.c */ 55 struct se_device *g_lun0_dev; 56 57 sense_reason_t 58 transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun) 59 { 60 struct se_lun *se_lun = NULL; 61 struct se_session *se_sess = se_cmd->se_sess; 62 struct se_device *dev; 63 unsigned long flags; 64 65 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) 66 return TCM_NON_EXISTENT_LUN; 67 68 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags); 69 se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun]; 70 if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 71 struct se_dev_entry *deve = se_cmd->se_deve; 72 73 deve->total_cmds++; 74 75 if ((se_cmd->data_direction == DMA_TO_DEVICE) && 76 (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) { 77 pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN" 78 " Access for 0x%08x\n", 79 se_cmd->se_tfo->get_fabric_name(), 80 unpacked_lun); 81 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); 82 return TCM_WRITE_PROTECTED; 83 } 84 85 if (se_cmd->data_direction == DMA_TO_DEVICE) 86 deve->write_bytes += se_cmd->data_length; 87 else if (se_cmd->data_direction == DMA_FROM_DEVICE) 88 deve->read_bytes += se_cmd->data_length; 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 percpu_ref_get(&se_lun->lun_ref); 97 se_cmd->lun_ref_active = true; 98 } 99 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); 100 101 if (!se_lun) { 102 /* 103 * Use the se_portal_group->tpg_virt_lun0 to allow for 104 * REPORT_LUNS, et al to be returned when no active 105 * MappedLUN=0 exists for this Initiator Port. 106 */ 107 if (unpacked_lun != 0) { 108 pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" 109 " Access for 0x%08x\n", 110 se_cmd->se_tfo->get_fabric_name(), 111 unpacked_lun); 112 return TCM_NON_EXISTENT_LUN; 113 } 114 /* 115 * Force WRITE PROTECT for virtual LUN 0 116 */ 117 if ((se_cmd->data_direction != DMA_FROM_DEVICE) && 118 (se_cmd->data_direction != DMA_NONE)) 119 return TCM_WRITE_PROTECTED; 120 121 se_lun = &se_sess->se_tpg->tpg_virt_lun0; 122 se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0; 123 se_cmd->orig_fe_lun = 0; 124 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; 125 126 percpu_ref_get(&se_lun->lun_ref); 127 se_cmd->lun_ref_active = true; 128 } 129 130 /* Directly associate cmd with se_dev */ 131 se_cmd->se_dev = se_lun->lun_se_dev; 132 133 dev = se_lun->lun_se_dev; 134 atomic_long_inc(&dev->num_cmds); 135 if (se_cmd->data_direction == DMA_TO_DEVICE) 136 atomic_long_add(se_cmd->data_length, &dev->write_bytes); 137 else if (se_cmd->data_direction == DMA_FROM_DEVICE) 138 atomic_long_add(se_cmd->data_length, &dev->read_bytes); 139 140 return 0; 141 } 142 EXPORT_SYMBOL(transport_lookup_cmd_lun); 143 144 int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun) 145 { 146 struct se_dev_entry *deve; 147 struct se_lun *se_lun = NULL; 148 struct se_session *se_sess = se_cmd->se_sess; 149 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req; 150 unsigned long flags; 151 152 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) 153 return -ENODEV; 154 155 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags); 156 se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun]; 157 deve = se_cmd->se_deve; 158 159 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 160 se_tmr->tmr_lun = deve->se_lun; 161 se_cmd->se_lun = deve->se_lun; 162 se_lun = deve->se_lun; 163 se_cmd->pr_res_key = deve->pr_res_key; 164 se_cmd->orig_fe_lun = unpacked_lun; 165 } 166 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); 167 168 if (!se_lun) { 169 pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" 170 " Access for 0x%08x\n", 171 se_cmd->se_tfo->get_fabric_name(), 172 unpacked_lun); 173 return -ENODEV; 174 } 175 176 /* Directly associate cmd with se_dev */ 177 se_cmd->se_dev = se_lun->lun_se_dev; 178 se_tmr->tmr_dev = se_lun->lun_se_dev; 179 180 spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags); 181 list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list); 182 spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags); 183 184 return 0; 185 } 186 EXPORT_SYMBOL(transport_lookup_tmr_lun); 187 188 /* 189 * This function is called from core_scsi3_emulate_pro_register_and_move() 190 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count 191 * when a matching rtpi is found. 192 */ 193 struct se_dev_entry *core_get_se_deve_from_rtpi( 194 struct se_node_acl *nacl, 195 u16 rtpi) 196 { 197 struct se_dev_entry *deve; 198 struct se_lun *lun; 199 struct se_port *port; 200 struct se_portal_group *tpg = nacl->se_tpg; 201 u32 i; 202 203 spin_lock_irq(&nacl->device_list_lock); 204 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 205 deve = nacl->device_list[i]; 206 207 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 208 continue; 209 210 lun = deve->se_lun; 211 if (!lun) { 212 pr_err("%s device entries device pointer is" 213 " NULL, but Initiator has access.\n", 214 tpg->se_tpg_tfo->get_fabric_name()); 215 continue; 216 } 217 port = lun->lun_sep; 218 if (!port) { 219 pr_err("%s device entries device pointer is" 220 " NULL, but Initiator has access.\n", 221 tpg->se_tpg_tfo->get_fabric_name()); 222 continue; 223 } 224 if (port->sep_rtpi != rtpi) 225 continue; 226 227 atomic_inc(&deve->pr_ref_count); 228 smp_mb__after_atomic_inc(); 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 -> explict 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 -> explict" 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 " -> explict 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_type != TRANSPORT_PLUGIN_PHBA_PDEV && 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_se_dev = NULL; 620 } 621 622 static void se_release_vpd_for_dev(struct se_device *dev) 623 { 624 struct t10_vpd *vpd, *vpd_tmp; 625 626 spin_lock(&dev->t10_wwn.t10_vpd_lock); 627 list_for_each_entry_safe(vpd, vpd_tmp, 628 &dev->t10_wwn.t10_vpd_list, vpd_list) { 629 list_del(&vpd->vpd_list); 630 kfree(vpd); 631 } 632 spin_unlock(&dev->t10_wwn.t10_vpd_lock); 633 } 634 635 static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size) 636 { 637 u32 aligned_max_sectors; 638 u32 alignment; 639 /* 640 * Limit max_sectors to a PAGE_SIZE aligned value for modern 641 * transport_allocate_data_tasks() operation. 642 */ 643 alignment = max(1ul, PAGE_SIZE / block_size); 644 aligned_max_sectors = rounddown(max_sectors, alignment); 645 646 if (max_sectors != aligned_max_sectors) 647 pr_info("Rounding down aligned max_sectors from %u to %u\n", 648 max_sectors, aligned_max_sectors); 649 650 return aligned_max_sectors; 651 } 652 653 int se_dev_set_max_unmap_lba_count( 654 struct se_device *dev, 655 u32 max_unmap_lba_count) 656 { 657 dev->dev_attrib.max_unmap_lba_count = max_unmap_lba_count; 658 pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n", 659 dev, dev->dev_attrib.max_unmap_lba_count); 660 return 0; 661 } 662 663 int se_dev_set_max_unmap_block_desc_count( 664 struct se_device *dev, 665 u32 max_unmap_block_desc_count) 666 { 667 dev->dev_attrib.max_unmap_block_desc_count = 668 max_unmap_block_desc_count; 669 pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n", 670 dev, dev->dev_attrib.max_unmap_block_desc_count); 671 return 0; 672 } 673 674 int se_dev_set_unmap_granularity( 675 struct se_device *dev, 676 u32 unmap_granularity) 677 { 678 dev->dev_attrib.unmap_granularity = unmap_granularity; 679 pr_debug("dev[%p]: Set unmap_granularity: %u\n", 680 dev, dev->dev_attrib.unmap_granularity); 681 return 0; 682 } 683 684 int se_dev_set_unmap_granularity_alignment( 685 struct se_device *dev, 686 u32 unmap_granularity_alignment) 687 { 688 dev->dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment; 689 pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n", 690 dev, dev->dev_attrib.unmap_granularity_alignment); 691 return 0; 692 } 693 694 int se_dev_set_max_write_same_len( 695 struct se_device *dev, 696 u32 max_write_same_len) 697 { 698 dev->dev_attrib.max_write_same_len = max_write_same_len; 699 pr_debug("dev[%p]: Set max_write_same_len: %u\n", 700 dev, dev->dev_attrib.max_write_same_len); 701 return 0; 702 } 703 704 static void dev_set_t10_wwn_model_alias(struct se_device *dev) 705 { 706 const char *configname; 707 708 configname = config_item_name(&dev->dev_group.cg_item); 709 if (strlen(configname) >= 16) { 710 pr_warn("dev[%p]: Backstore name '%s' is too long for " 711 "INQUIRY_MODEL, truncating to 16 bytes\n", dev, 712 configname); 713 } 714 snprintf(&dev->t10_wwn.model[0], 16, "%s", configname); 715 } 716 717 int se_dev_set_emulate_model_alias(struct se_device *dev, int flag) 718 { 719 if (dev->export_count) { 720 pr_err("dev[%p]: Unable to change model alias" 721 " while export_count is %d\n", 722 dev, dev->export_count); 723 return -EINVAL; 724 } 725 726 if (flag != 0 && flag != 1) { 727 pr_err("Illegal value %d\n", flag); 728 return -EINVAL; 729 } 730 731 if (flag) { 732 dev_set_t10_wwn_model_alias(dev); 733 } else { 734 strncpy(&dev->t10_wwn.model[0], 735 dev->transport->inquiry_prod, 16); 736 } 737 dev->dev_attrib.emulate_model_alias = flag; 738 739 return 0; 740 } 741 742 int se_dev_set_emulate_dpo(struct se_device *dev, int flag) 743 { 744 if (flag != 0 && flag != 1) { 745 pr_err("Illegal value %d\n", flag); 746 return -EINVAL; 747 } 748 749 if (flag) { 750 pr_err("dpo_emulated not supported\n"); 751 return -EINVAL; 752 } 753 754 return 0; 755 } 756 757 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag) 758 { 759 if (flag != 0 && flag != 1) { 760 pr_err("Illegal value %d\n", flag); 761 return -EINVAL; 762 } 763 764 if (flag && 765 dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 766 pr_err("emulate_fua_write not supported for pSCSI\n"); 767 return -EINVAL; 768 } 769 dev->dev_attrib.emulate_fua_write = flag; 770 pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n", 771 dev, dev->dev_attrib.emulate_fua_write); 772 return 0; 773 } 774 775 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag) 776 { 777 if (flag != 0 && flag != 1) { 778 pr_err("Illegal value %d\n", flag); 779 return -EINVAL; 780 } 781 782 if (flag) { 783 pr_err("ua read emulated not supported\n"); 784 return -EINVAL; 785 } 786 787 return 0; 788 } 789 790 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag) 791 { 792 if (flag != 0 && flag != 1) { 793 pr_err("Illegal value %d\n", flag); 794 return -EINVAL; 795 } 796 if (flag && 797 dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 798 pr_err("emulate_write_cache not supported for pSCSI\n"); 799 return -EINVAL; 800 } 801 if (dev->transport->get_write_cache) { 802 pr_warn("emulate_write_cache cannot be changed when underlying" 803 " HW reports WriteCacheEnabled, ignoring request\n"); 804 return 0; 805 } 806 807 dev->dev_attrib.emulate_write_cache = flag; 808 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 809 dev, dev->dev_attrib.emulate_write_cache); 810 return 0; 811 } 812 813 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag) 814 { 815 if ((flag != 0) && (flag != 1) && (flag != 2)) { 816 pr_err("Illegal value %d\n", flag); 817 return -EINVAL; 818 } 819 820 if (dev->export_count) { 821 pr_err("dev[%p]: Unable to change SE Device" 822 " UA_INTRLCK_CTRL while export_count is %d\n", 823 dev, dev->export_count); 824 return -EINVAL; 825 } 826 dev->dev_attrib.emulate_ua_intlck_ctrl = flag; 827 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 828 dev, dev->dev_attrib.emulate_ua_intlck_ctrl); 829 830 return 0; 831 } 832 833 int se_dev_set_emulate_tas(struct se_device *dev, int flag) 834 { 835 if ((flag != 0) && (flag != 1)) { 836 pr_err("Illegal value %d\n", flag); 837 return -EINVAL; 838 } 839 840 if (dev->export_count) { 841 pr_err("dev[%p]: Unable to change SE Device TAS while" 842 " export_count is %d\n", 843 dev, dev->export_count); 844 return -EINVAL; 845 } 846 dev->dev_attrib.emulate_tas = flag; 847 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 848 dev, (dev->dev_attrib.emulate_tas) ? "Enabled" : "Disabled"); 849 850 return 0; 851 } 852 853 int se_dev_set_emulate_tpu(struct se_device *dev, int flag) 854 { 855 if ((flag != 0) && (flag != 1)) { 856 pr_err("Illegal value %d\n", flag); 857 return -EINVAL; 858 } 859 /* 860 * We expect this value to be non-zero when generic Block Layer 861 * Discard supported is detected iblock_create_virtdevice(). 862 */ 863 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) { 864 pr_err("Generic Block Discard not supported\n"); 865 return -ENOSYS; 866 } 867 868 dev->dev_attrib.emulate_tpu = flag; 869 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 870 dev, flag); 871 return 0; 872 } 873 874 int se_dev_set_emulate_tpws(struct se_device *dev, int flag) 875 { 876 if ((flag != 0) && (flag != 1)) { 877 pr_err("Illegal value %d\n", flag); 878 return -EINVAL; 879 } 880 /* 881 * We expect this value to be non-zero when generic Block Layer 882 * Discard supported is detected iblock_create_virtdevice(). 883 */ 884 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) { 885 pr_err("Generic Block Discard not supported\n"); 886 return -ENOSYS; 887 } 888 889 dev->dev_attrib.emulate_tpws = flag; 890 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 891 dev, flag); 892 return 0; 893 } 894 895 int se_dev_set_emulate_caw(struct se_device *dev, int flag) 896 { 897 if (flag != 0 && flag != 1) { 898 pr_err("Illegal value %d\n", flag); 899 return -EINVAL; 900 } 901 dev->dev_attrib.emulate_caw = flag; 902 pr_debug("dev[%p]: SE Device CompareAndWrite (AtomicTestandSet): %d\n", 903 dev, flag); 904 905 return 0; 906 } 907 908 int se_dev_set_emulate_3pc(struct se_device *dev, int flag) 909 { 910 if (flag != 0 && flag != 1) { 911 pr_err("Illegal value %d\n", flag); 912 return -EINVAL; 913 } 914 dev->dev_attrib.emulate_3pc = flag; 915 pr_debug("dev[%p]: SE Device 3rd Party Copy (EXTENDED_COPY): %d\n", 916 dev, flag); 917 918 return 0; 919 } 920 921 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag) 922 { 923 if ((flag != 0) && (flag != 1)) { 924 pr_err("Illegal value %d\n", flag); 925 return -EINVAL; 926 } 927 dev->dev_attrib.enforce_pr_isids = flag; 928 pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev, 929 (dev->dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled"); 930 return 0; 931 } 932 933 int se_dev_set_is_nonrot(struct se_device *dev, int flag) 934 { 935 if ((flag != 0) && (flag != 1)) { 936 printk(KERN_ERR "Illegal value %d\n", flag); 937 return -EINVAL; 938 } 939 dev->dev_attrib.is_nonrot = flag; 940 pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n", 941 dev, flag); 942 return 0; 943 } 944 945 int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag) 946 { 947 if (flag != 0) { 948 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted" 949 " reordering not implemented\n", dev); 950 return -ENOSYS; 951 } 952 dev->dev_attrib.emulate_rest_reord = flag; 953 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag); 954 return 0; 955 } 956 957 /* 958 * Note, this can only be called on unexported SE Device Object. 959 */ 960 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth) 961 { 962 if (dev->export_count) { 963 pr_err("dev[%p]: Unable to change SE Device TCQ while" 964 " export_count is %d\n", 965 dev, dev->export_count); 966 return -EINVAL; 967 } 968 if (!queue_depth) { 969 pr_err("dev[%p]: Illegal ZERO value for queue" 970 "_depth\n", dev); 971 return -EINVAL; 972 } 973 974 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 975 if (queue_depth > dev->dev_attrib.hw_queue_depth) { 976 pr_err("dev[%p]: Passed queue_depth: %u" 977 " exceeds TCM/SE_Device TCQ: %u\n", 978 dev, queue_depth, 979 dev->dev_attrib.hw_queue_depth); 980 return -EINVAL; 981 } 982 } else { 983 if (queue_depth > dev->dev_attrib.queue_depth) { 984 if (queue_depth > dev->dev_attrib.hw_queue_depth) { 985 pr_err("dev[%p]: Passed queue_depth:" 986 " %u exceeds TCM/SE_Device MAX" 987 " TCQ: %u\n", dev, queue_depth, 988 dev->dev_attrib.hw_queue_depth); 989 return -EINVAL; 990 } 991 } 992 } 993 994 dev->dev_attrib.queue_depth = dev->queue_depth = queue_depth; 995 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", 996 dev, queue_depth); 997 return 0; 998 } 999 1000 int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors) 1001 { 1002 int block_size = dev->dev_attrib.block_size; 1003 1004 if (dev->export_count) { 1005 pr_err("dev[%p]: Unable to change SE Device" 1006 " fabric_max_sectors while export_count is %d\n", 1007 dev, dev->export_count); 1008 return -EINVAL; 1009 } 1010 if (!fabric_max_sectors) { 1011 pr_err("dev[%p]: Illegal ZERO value for" 1012 " fabric_max_sectors\n", dev); 1013 return -EINVAL; 1014 } 1015 if (fabric_max_sectors < DA_STATUS_MAX_SECTORS_MIN) { 1016 pr_err("dev[%p]: Passed fabric_max_sectors: %u less than" 1017 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, fabric_max_sectors, 1018 DA_STATUS_MAX_SECTORS_MIN); 1019 return -EINVAL; 1020 } 1021 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1022 if (fabric_max_sectors > dev->dev_attrib.hw_max_sectors) { 1023 pr_err("dev[%p]: Passed fabric_max_sectors: %u" 1024 " greater than TCM/SE_Device max_sectors:" 1025 " %u\n", dev, fabric_max_sectors, 1026 dev->dev_attrib.hw_max_sectors); 1027 return -EINVAL; 1028 } 1029 } else { 1030 if (fabric_max_sectors > DA_STATUS_MAX_SECTORS_MAX) { 1031 pr_err("dev[%p]: Passed fabric_max_sectors: %u" 1032 " greater than DA_STATUS_MAX_SECTORS_MAX:" 1033 " %u\n", dev, fabric_max_sectors, 1034 DA_STATUS_MAX_SECTORS_MAX); 1035 return -EINVAL; 1036 } 1037 } 1038 /* 1039 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks() 1040 */ 1041 if (!block_size) { 1042 block_size = 512; 1043 pr_warn("Defaulting to 512 for zero block_size\n"); 1044 } 1045 fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors, 1046 block_size); 1047 1048 dev->dev_attrib.fabric_max_sectors = fabric_max_sectors; 1049 pr_debug("dev[%p]: SE Device max_sectors changed to %u\n", 1050 dev, fabric_max_sectors); 1051 return 0; 1052 } 1053 1054 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors) 1055 { 1056 if (dev->export_count) { 1057 pr_err("dev[%p]: Unable to change SE Device" 1058 " optimal_sectors while export_count is %d\n", 1059 dev, dev->export_count); 1060 return -EINVAL; 1061 } 1062 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1063 pr_err("dev[%p]: Passed optimal_sectors cannot be" 1064 " changed for TCM/pSCSI\n", dev); 1065 return -EINVAL; 1066 } 1067 if (optimal_sectors > dev->dev_attrib.fabric_max_sectors) { 1068 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1069 " greater than fabric_max_sectors: %u\n", dev, 1070 optimal_sectors, dev->dev_attrib.fabric_max_sectors); 1071 return -EINVAL; 1072 } 1073 1074 dev->dev_attrib.optimal_sectors = optimal_sectors; 1075 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1076 dev, optimal_sectors); 1077 return 0; 1078 } 1079 1080 int se_dev_set_block_size(struct se_device *dev, u32 block_size) 1081 { 1082 if (dev->export_count) { 1083 pr_err("dev[%p]: Unable to change SE Device block_size" 1084 " while export_count is %d\n", 1085 dev, dev->export_count); 1086 return -EINVAL; 1087 } 1088 1089 if ((block_size != 512) && 1090 (block_size != 1024) && 1091 (block_size != 2048) && 1092 (block_size != 4096)) { 1093 pr_err("dev[%p]: Illegal value for block_device: %u" 1094 " for SE device, must be 512, 1024, 2048 or 4096\n", 1095 dev, block_size); 1096 return -EINVAL; 1097 } 1098 1099 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1100 pr_err("dev[%p]: Not allowed to change block_size for" 1101 " Physical Device, use for Linux/SCSI to change" 1102 " block_size for underlying hardware\n", dev); 1103 return -EINVAL; 1104 } 1105 1106 dev->dev_attrib.block_size = block_size; 1107 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1108 dev, block_size); 1109 return 0; 1110 } 1111 1112 struct se_lun *core_dev_add_lun( 1113 struct se_portal_group *tpg, 1114 struct se_device *dev, 1115 u32 lun) 1116 { 1117 struct se_lun *lun_p; 1118 int rc; 1119 1120 lun_p = core_tpg_pre_addlun(tpg, lun); 1121 if (IS_ERR(lun_p)) 1122 return lun_p; 1123 1124 rc = core_tpg_post_addlun(tpg, lun_p, 1125 TRANSPORT_LUNFLAGS_READ_WRITE, dev); 1126 if (rc < 0) 1127 return ERR_PTR(rc); 1128 1129 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from" 1130 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1131 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun_p->unpacked_lun, 1132 tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id); 1133 /* 1134 * Update LUN maps for dynamically added initiators when 1135 * generate_node_acl is enabled. 1136 */ 1137 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) { 1138 struct se_node_acl *acl; 1139 spin_lock_irq(&tpg->acl_node_lock); 1140 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { 1141 if (acl->dynamic_node_acl && 1142 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only || 1143 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) { 1144 spin_unlock_irq(&tpg->acl_node_lock); 1145 core_tpg_add_node_to_devs(acl, tpg); 1146 spin_lock_irq(&tpg->acl_node_lock); 1147 } 1148 } 1149 spin_unlock_irq(&tpg->acl_node_lock); 1150 } 1151 1152 return lun_p; 1153 } 1154 1155 /* core_dev_del_lun(): 1156 * 1157 * 1158 */ 1159 int core_dev_del_lun( 1160 struct se_portal_group *tpg, 1161 u32 unpacked_lun) 1162 { 1163 struct se_lun *lun; 1164 1165 lun = core_tpg_pre_dellun(tpg, unpacked_lun); 1166 if (IS_ERR(lun)) 1167 return PTR_ERR(lun); 1168 1169 core_tpg_post_dellun(tpg, lun); 1170 1171 pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from" 1172 " device object\n", tpg->se_tpg_tfo->get_fabric_name(), 1173 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, 1174 tpg->se_tpg_tfo->get_fabric_name()); 1175 1176 return 0; 1177 } 1178 1179 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun) 1180 { 1181 struct se_lun *lun; 1182 1183 spin_lock(&tpg->tpg_lun_lock); 1184 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1185 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS" 1186 "_PER_TPG-1: %u for Target Portal Group: %hu\n", 1187 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1188 TRANSPORT_MAX_LUNS_PER_TPG-1, 1189 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1190 spin_unlock(&tpg->tpg_lun_lock); 1191 return NULL; 1192 } 1193 lun = tpg->tpg_lun_list[unpacked_lun]; 1194 1195 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) { 1196 pr_err("%s Logical Unit Number: %u is not free on" 1197 " Target Portal Group: %hu, ignoring request.\n", 1198 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1199 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1200 spin_unlock(&tpg->tpg_lun_lock); 1201 return NULL; 1202 } 1203 spin_unlock(&tpg->tpg_lun_lock); 1204 1205 return lun; 1206 } 1207 1208 /* core_dev_get_lun(): 1209 * 1210 * 1211 */ 1212 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun) 1213 { 1214 struct se_lun *lun; 1215 1216 spin_lock(&tpg->tpg_lun_lock); 1217 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1218 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER" 1219 "_TPG-1: %u for Target Portal Group: %hu\n", 1220 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1221 TRANSPORT_MAX_LUNS_PER_TPG-1, 1222 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1223 spin_unlock(&tpg->tpg_lun_lock); 1224 return NULL; 1225 } 1226 lun = tpg->tpg_lun_list[unpacked_lun]; 1227 1228 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { 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 spin_unlock(&tpg->tpg_lun_lock); 1234 return NULL; 1235 } 1236 spin_unlock(&tpg->tpg_lun_lock); 1237 1238 return lun; 1239 } 1240 1241 struct se_lun_acl *core_dev_init_initiator_node_lun_acl( 1242 struct se_portal_group *tpg, 1243 struct se_node_acl *nacl, 1244 u32 mapped_lun, 1245 int *ret) 1246 { 1247 struct se_lun_acl *lacl; 1248 1249 if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) { 1250 pr_err("%s InitiatorName exceeds maximum size.\n", 1251 tpg->se_tpg_tfo->get_fabric_name()); 1252 *ret = -EOVERFLOW; 1253 return NULL; 1254 } 1255 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL); 1256 if (!lacl) { 1257 pr_err("Unable to allocate memory for struct se_lun_acl.\n"); 1258 *ret = -ENOMEM; 1259 return NULL; 1260 } 1261 1262 INIT_LIST_HEAD(&lacl->lacl_list); 1263 lacl->mapped_lun = mapped_lun; 1264 lacl->se_lun_nacl = nacl; 1265 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", 1266 nacl->initiatorname); 1267 1268 return lacl; 1269 } 1270 1271 int core_dev_add_initiator_node_lun_acl( 1272 struct se_portal_group *tpg, 1273 struct se_lun_acl *lacl, 1274 u32 unpacked_lun, 1275 u32 lun_access) 1276 { 1277 struct se_lun *lun; 1278 struct se_node_acl *nacl; 1279 1280 lun = core_dev_get_lun(tpg, unpacked_lun); 1281 if (!lun) { 1282 pr_err("%s Logical Unit Number: %u is not active on" 1283 " Target Portal Group: %hu, ignoring request.\n", 1284 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1285 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1286 return -EINVAL; 1287 } 1288 1289 nacl = lacl->se_lun_nacl; 1290 if (!nacl) 1291 return -EINVAL; 1292 1293 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) && 1294 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE)) 1295 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; 1296 1297 lacl->se_lun = lun; 1298 1299 if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun, 1300 lun_access, nacl, tpg) < 0) 1301 return -EINVAL; 1302 1303 spin_lock(&lun->lun_acl_lock); 1304 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list); 1305 atomic_inc(&lun->lun_acl_count); 1306 smp_mb__after_atomic_inc(); 1307 spin_unlock(&lun->lun_acl_lock); 1308 1309 pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for " 1310 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(), 1311 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun, 1312 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO", 1313 lacl->initiatorname); 1314 /* 1315 * Check to see if there are any existing persistent reservation APTPL 1316 * pre-registrations that need to be enabled for this LUN ACL.. 1317 */ 1318 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl); 1319 return 0; 1320 } 1321 1322 /* core_dev_del_initiator_node_lun_acl(): 1323 * 1324 * 1325 */ 1326 int core_dev_del_initiator_node_lun_acl( 1327 struct se_portal_group *tpg, 1328 struct se_lun *lun, 1329 struct se_lun_acl *lacl) 1330 { 1331 struct se_node_acl *nacl; 1332 1333 nacl = lacl->se_lun_nacl; 1334 if (!nacl) 1335 return -EINVAL; 1336 1337 spin_lock(&lun->lun_acl_lock); 1338 list_del(&lacl->lacl_list); 1339 atomic_dec(&lun->lun_acl_count); 1340 smp_mb__after_atomic_dec(); 1341 spin_unlock(&lun->lun_acl_lock); 1342 1343 core_disable_device_list_for_node(lun, NULL, lacl->mapped_lun, 1344 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg); 1345 1346 lacl->se_lun = NULL; 1347 1348 pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for" 1349 " InitiatorNode: %s Mapped LUN: %u\n", 1350 tpg->se_tpg_tfo->get_fabric_name(), 1351 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, 1352 lacl->initiatorname, lacl->mapped_lun); 1353 1354 return 0; 1355 } 1356 1357 void core_dev_free_initiator_node_lun_acl( 1358 struct se_portal_group *tpg, 1359 struct se_lun_acl *lacl) 1360 { 1361 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s" 1362 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1363 tpg->se_tpg_tfo->tpg_get_tag(tpg), 1364 tpg->se_tpg_tfo->get_fabric_name(), 1365 lacl->initiatorname, lacl->mapped_lun); 1366 1367 kfree(lacl); 1368 } 1369 1370 static void scsi_dump_inquiry(struct se_device *dev) 1371 { 1372 struct t10_wwn *wwn = &dev->t10_wwn; 1373 char buf[17]; 1374 int i, device_type; 1375 /* 1376 * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer 1377 */ 1378 for (i = 0; i < 8; i++) 1379 if (wwn->vendor[i] >= 0x20) 1380 buf[i] = wwn->vendor[i]; 1381 else 1382 buf[i] = ' '; 1383 buf[i] = '\0'; 1384 pr_debug(" Vendor: %s\n", buf); 1385 1386 for (i = 0; i < 16; i++) 1387 if (wwn->model[i] >= 0x20) 1388 buf[i] = wwn->model[i]; 1389 else 1390 buf[i] = ' '; 1391 buf[i] = '\0'; 1392 pr_debug(" Model: %s\n", buf); 1393 1394 for (i = 0; i < 4; i++) 1395 if (wwn->revision[i] >= 0x20) 1396 buf[i] = wwn->revision[i]; 1397 else 1398 buf[i] = ' '; 1399 buf[i] = '\0'; 1400 pr_debug(" Revision: %s\n", buf); 1401 1402 device_type = dev->transport->get_device_type(dev); 1403 pr_debug(" Type: %s ", scsi_device_type(device_type)); 1404 } 1405 1406 struct se_device *target_alloc_device(struct se_hba *hba, const char *name) 1407 { 1408 struct se_device *dev; 1409 struct se_lun *xcopy_lun; 1410 1411 dev = hba->transport->alloc_device(hba, name); 1412 if (!dev) 1413 return NULL; 1414 1415 dev->dev_link_magic = SE_DEV_LINK_MAGIC; 1416 dev->se_hba = hba; 1417 dev->transport = hba->transport; 1418 1419 INIT_LIST_HEAD(&dev->dev_list); 1420 INIT_LIST_HEAD(&dev->dev_sep_list); 1421 INIT_LIST_HEAD(&dev->dev_tmr_list); 1422 INIT_LIST_HEAD(&dev->delayed_cmd_list); 1423 INIT_LIST_HEAD(&dev->state_list); 1424 INIT_LIST_HEAD(&dev->qf_cmd_list); 1425 INIT_LIST_HEAD(&dev->g_dev_node); 1426 spin_lock_init(&dev->execute_task_lock); 1427 spin_lock_init(&dev->delayed_cmd_lock); 1428 spin_lock_init(&dev->dev_reservation_lock); 1429 spin_lock_init(&dev->se_port_lock); 1430 spin_lock_init(&dev->se_tmr_lock); 1431 spin_lock_init(&dev->qf_cmd_lock); 1432 sema_init(&dev->caw_sem, 1); 1433 atomic_set(&dev->dev_ordered_id, 0); 1434 INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list); 1435 spin_lock_init(&dev->t10_wwn.t10_vpd_lock); 1436 INIT_LIST_HEAD(&dev->t10_pr.registration_list); 1437 INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list); 1438 spin_lock_init(&dev->t10_pr.registration_lock); 1439 spin_lock_init(&dev->t10_pr.aptpl_reg_lock); 1440 INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list); 1441 spin_lock_init(&dev->t10_alua.tg_pt_gps_lock); 1442 1443 dev->t10_wwn.t10_dev = dev; 1444 dev->t10_alua.t10_dev = dev; 1445 1446 dev->dev_attrib.da_dev = dev; 1447 dev->dev_attrib.emulate_model_alias = DA_EMULATE_MODEL_ALIAS; 1448 dev->dev_attrib.emulate_dpo = DA_EMULATE_DPO; 1449 dev->dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE; 1450 dev->dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ; 1451 dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE; 1452 dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL; 1453 dev->dev_attrib.emulate_tas = DA_EMULATE_TAS; 1454 dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU; 1455 dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS; 1456 dev->dev_attrib.emulate_caw = DA_EMULATE_CAW; 1457 dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC; 1458 dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS; 1459 dev->dev_attrib.is_nonrot = DA_IS_NONROT; 1460 dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD; 1461 dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT; 1462 dev->dev_attrib.max_unmap_block_desc_count = 1463 DA_MAX_UNMAP_BLOCK_DESC_COUNT; 1464 dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT; 1465 dev->dev_attrib.unmap_granularity_alignment = 1466 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT; 1467 dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN; 1468 dev->dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS; 1469 dev->dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS; 1470 1471 xcopy_lun = &dev->xcopy_lun; 1472 xcopy_lun->lun_se_dev = dev; 1473 init_completion(&xcopy_lun->lun_shutdown_comp); 1474 INIT_LIST_HEAD(&xcopy_lun->lun_acl_list); 1475 spin_lock_init(&xcopy_lun->lun_acl_lock); 1476 spin_lock_init(&xcopy_lun->lun_sep_lock); 1477 init_completion(&xcopy_lun->lun_ref_comp); 1478 1479 return dev; 1480 } 1481 1482 int target_configure_device(struct se_device *dev) 1483 { 1484 struct se_hba *hba = dev->se_hba; 1485 int ret; 1486 1487 if (dev->dev_flags & DF_CONFIGURED) { 1488 pr_err("se_dev->se_dev_ptr already set for storage" 1489 " object\n"); 1490 return -EEXIST; 1491 } 1492 1493 ret = dev->transport->configure_device(dev); 1494 if (ret) 1495 goto out; 1496 dev->dev_flags |= DF_CONFIGURED; 1497 1498 /* 1499 * XXX: there is not much point to have two different values here.. 1500 */ 1501 dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size; 1502 dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth; 1503 1504 /* 1505 * Align max_hw_sectors down to PAGE_SIZE I/O transfers 1506 */ 1507 dev->dev_attrib.hw_max_sectors = 1508 se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors, 1509 dev->dev_attrib.hw_block_size); 1510 1511 dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX); 1512 dev->creation_time = get_jiffies_64(); 1513 1514 ret = core_setup_alua(dev); 1515 if (ret) 1516 goto out; 1517 1518 /* 1519 * Startup the struct se_device processing thread 1520 */ 1521 dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1, 1522 dev->transport->name); 1523 if (!dev->tmr_wq) { 1524 pr_err("Unable to create tmr workqueue for %s\n", 1525 dev->transport->name); 1526 ret = -ENOMEM; 1527 goto out_free_alua; 1528 } 1529 1530 /* 1531 * Setup work_queue for QUEUE_FULL 1532 */ 1533 INIT_WORK(&dev->qf_work_queue, target_qf_do_work); 1534 1535 /* 1536 * Preload the initial INQUIRY const values if we are doing 1537 * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI 1538 * passthrough because this is being provided by the backend LLD. 1539 */ 1540 if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) { 1541 strncpy(&dev->t10_wwn.vendor[0], "LIO-ORG", 8); 1542 strncpy(&dev->t10_wwn.model[0], 1543 dev->transport->inquiry_prod, 16); 1544 strncpy(&dev->t10_wwn.revision[0], 1545 dev->transport->inquiry_rev, 4); 1546 } 1547 1548 scsi_dump_inquiry(dev); 1549 1550 spin_lock(&hba->device_lock); 1551 hba->dev_count++; 1552 spin_unlock(&hba->device_lock); 1553 1554 mutex_lock(&g_device_mutex); 1555 list_add_tail(&dev->g_dev_node, &g_device_list); 1556 mutex_unlock(&g_device_mutex); 1557 1558 return 0; 1559 1560 out_free_alua: 1561 core_alua_free_lu_gp_mem(dev); 1562 out: 1563 se_release_vpd_for_dev(dev); 1564 return ret; 1565 } 1566 1567 void target_free_device(struct se_device *dev) 1568 { 1569 struct se_hba *hba = dev->se_hba; 1570 1571 WARN_ON(!list_empty(&dev->dev_sep_list)); 1572 1573 if (dev->dev_flags & DF_CONFIGURED) { 1574 destroy_workqueue(dev->tmr_wq); 1575 1576 mutex_lock(&g_device_mutex); 1577 list_del(&dev->g_dev_node); 1578 mutex_unlock(&g_device_mutex); 1579 1580 spin_lock(&hba->device_lock); 1581 hba->dev_count--; 1582 spin_unlock(&hba->device_lock); 1583 } 1584 1585 core_alua_free_lu_gp_mem(dev); 1586 core_scsi3_free_all_registrations(dev); 1587 se_release_vpd_for_dev(dev); 1588 1589 dev->transport->free_device(dev); 1590 } 1591 1592 int core_dev_setup_virtual_lun0(void) 1593 { 1594 struct se_hba *hba; 1595 struct se_device *dev; 1596 char buf[] = "rd_pages=8,rd_nullio=1"; 1597 int ret; 1598 1599 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE); 1600 if (IS_ERR(hba)) 1601 return PTR_ERR(hba); 1602 1603 dev = target_alloc_device(hba, "virt_lun0"); 1604 if (!dev) { 1605 ret = -ENOMEM; 1606 goto out_free_hba; 1607 } 1608 1609 hba->transport->set_configfs_dev_params(dev, buf, sizeof(buf)); 1610 1611 ret = target_configure_device(dev); 1612 if (ret) 1613 goto out_free_se_dev; 1614 1615 lun0_hba = hba; 1616 g_lun0_dev = dev; 1617 return 0; 1618 1619 out_free_se_dev: 1620 target_free_device(dev); 1621 out_free_hba: 1622 core_delete_hba(hba); 1623 return ret; 1624 } 1625 1626 1627 void core_dev_release_virtual_lun0(void) 1628 { 1629 struct se_hba *hba = lun0_hba; 1630 1631 if (!hba) 1632 return; 1633 1634 if (g_lun0_dev) 1635 target_free_device(g_lun0_dev); 1636 core_delete_hba(hba); 1637 } 1638