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_mb(&deve->pr_ref_count); 228 spin_unlock_irq(&nacl->device_list_lock); 229 230 return deve; 231 } 232 spin_unlock_irq(&nacl->device_list_lock); 233 234 return NULL; 235 } 236 237 int core_free_device_list_for_node( 238 struct se_node_acl *nacl, 239 struct se_portal_group *tpg) 240 { 241 struct se_dev_entry *deve; 242 struct se_lun *lun; 243 u32 i; 244 245 if (!nacl->device_list) 246 return 0; 247 248 spin_lock_irq(&nacl->device_list_lock); 249 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 250 deve = nacl->device_list[i]; 251 252 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 253 continue; 254 255 if (!deve->se_lun) { 256 pr_err("%s device entries device pointer is" 257 " NULL, but Initiator has access.\n", 258 tpg->se_tpg_tfo->get_fabric_name()); 259 continue; 260 } 261 lun = deve->se_lun; 262 263 spin_unlock_irq(&nacl->device_list_lock); 264 core_disable_device_list_for_node(lun, NULL, deve->mapped_lun, 265 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg); 266 spin_lock_irq(&nacl->device_list_lock); 267 } 268 spin_unlock_irq(&nacl->device_list_lock); 269 270 array_free(nacl->device_list, TRANSPORT_MAX_LUNS_PER_TPG); 271 nacl->device_list = NULL; 272 273 return 0; 274 } 275 276 void core_update_device_list_access( 277 u32 mapped_lun, 278 u32 lun_access, 279 struct se_node_acl *nacl) 280 { 281 struct se_dev_entry *deve; 282 283 spin_lock_irq(&nacl->device_list_lock); 284 deve = nacl->device_list[mapped_lun]; 285 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 286 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 287 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 288 } else { 289 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 290 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 291 } 292 spin_unlock_irq(&nacl->device_list_lock); 293 } 294 295 /* core_enable_device_list_for_node(): 296 * 297 * 298 */ 299 int core_enable_device_list_for_node( 300 struct se_lun *lun, 301 struct se_lun_acl *lun_acl, 302 u32 mapped_lun, 303 u32 lun_access, 304 struct se_node_acl *nacl, 305 struct se_portal_group *tpg) 306 { 307 struct se_port *port = lun->lun_sep; 308 struct se_dev_entry *deve; 309 310 spin_lock_irq(&nacl->device_list_lock); 311 312 deve = nacl->device_list[mapped_lun]; 313 314 /* 315 * Check if the call is handling demo mode -> explicit LUN ACL 316 * transition. This transition must be for the same struct se_lun 317 * + mapped_lun that was setup in demo mode.. 318 */ 319 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 320 if (deve->se_lun_acl != NULL) { 321 pr_err("struct se_dev_entry->se_lun_acl" 322 " already set for demo mode -> explicit" 323 " LUN ACL transition\n"); 324 spin_unlock_irq(&nacl->device_list_lock); 325 return -EINVAL; 326 } 327 if (deve->se_lun != lun) { 328 pr_err("struct se_dev_entry->se_lun does" 329 " match passed struct se_lun for demo mode" 330 " -> explicit LUN ACL transition\n"); 331 spin_unlock_irq(&nacl->device_list_lock); 332 return -EINVAL; 333 } 334 deve->se_lun_acl = lun_acl; 335 336 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 337 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 338 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 339 } else { 340 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 341 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 342 } 343 344 spin_unlock_irq(&nacl->device_list_lock); 345 return 0; 346 } 347 348 deve->se_lun = lun; 349 deve->se_lun_acl = lun_acl; 350 deve->mapped_lun = mapped_lun; 351 deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS; 352 353 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 354 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 355 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 356 } else { 357 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 358 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 359 } 360 361 deve->creation_time = get_jiffies_64(); 362 deve->attach_count++; 363 spin_unlock_irq(&nacl->device_list_lock); 364 365 spin_lock_bh(&port->sep_alua_lock); 366 list_add_tail(&deve->alua_port_list, &port->sep_alua_list); 367 spin_unlock_bh(&port->sep_alua_lock); 368 369 return 0; 370 } 371 372 /* core_disable_device_list_for_node(): 373 * 374 * 375 */ 376 int core_disable_device_list_for_node( 377 struct se_lun *lun, 378 struct se_lun_acl *lun_acl, 379 u32 mapped_lun, 380 u32 lun_access, 381 struct se_node_acl *nacl, 382 struct se_portal_group *tpg) 383 { 384 struct se_port *port = lun->lun_sep; 385 struct se_dev_entry *deve = nacl->device_list[mapped_lun]; 386 387 /* 388 * If the MappedLUN entry is being disabled, the entry in 389 * port->sep_alua_list must be removed now before clearing the 390 * struct se_dev_entry pointers below as logic in 391 * core_alua_do_transition_tg_pt() depends on these being present. 392 * 393 * deve->se_lun_acl will be NULL for demo-mode created LUNs 394 * that have not been explicitly converted to MappedLUNs -> 395 * struct se_lun_acl, but we remove deve->alua_port_list from 396 * port->sep_alua_list. This also means that active UAs and 397 * NodeACL context specific PR metadata for demo-mode 398 * MappedLUN *deve will be released below.. 399 */ 400 spin_lock_bh(&port->sep_alua_lock); 401 list_del(&deve->alua_port_list); 402 spin_unlock_bh(&port->sep_alua_lock); 403 /* 404 * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE 405 * PR operation to complete. 406 */ 407 while (atomic_read(&deve->pr_ref_count) != 0) 408 cpu_relax(); 409 410 spin_lock_irq(&nacl->device_list_lock); 411 /* 412 * Disable struct se_dev_entry LUN ACL mapping 413 */ 414 core_scsi3_ua_release_all(deve); 415 deve->se_lun = NULL; 416 deve->se_lun_acl = NULL; 417 deve->lun_flags = 0; 418 deve->creation_time = 0; 419 deve->attach_count--; 420 spin_unlock_irq(&nacl->device_list_lock); 421 422 core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl); 423 return 0; 424 } 425 426 /* core_clear_lun_from_tpg(): 427 * 428 * 429 */ 430 void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg) 431 { 432 struct se_node_acl *nacl; 433 struct se_dev_entry *deve; 434 u32 i; 435 436 spin_lock_irq(&tpg->acl_node_lock); 437 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) { 438 spin_unlock_irq(&tpg->acl_node_lock); 439 440 spin_lock_irq(&nacl->device_list_lock); 441 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 442 deve = nacl->device_list[i]; 443 if (lun != deve->se_lun) 444 continue; 445 spin_unlock_irq(&nacl->device_list_lock); 446 447 core_disable_device_list_for_node(lun, NULL, 448 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS, 449 nacl, tpg); 450 451 spin_lock_irq(&nacl->device_list_lock); 452 } 453 spin_unlock_irq(&nacl->device_list_lock); 454 455 spin_lock_irq(&tpg->acl_node_lock); 456 } 457 spin_unlock_irq(&tpg->acl_node_lock); 458 } 459 460 static struct se_port *core_alloc_port(struct se_device *dev) 461 { 462 struct se_port *port, *port_tmp; 463 464 port = kzalloc(sizeof(struct se_port), GFP_KERNEL); 465 if (!port) { 466 pr_err("Unable to allocate struct se_port\n"); 467 return ERR_PTR(-ENOMEM); 468 } 469 INIT_LIST_HEAD(&port->sep_alua_list); 470 INIT_LIST_HEAD(&port->sep_list); 471 atomic_set(&port->sep_tg_pt_secondary_offline, 0); 472 spin_lock_init(&port->sep_alua_lock); 473 mutex_init(&port->sep_tg_pt_md_mutex); 474 475 spin_lock(&dev->se_port_lock); 476 if (dev->dev_port_count == 0x0000ffff) { 477 pr_warn("Reached dev->dev_port_count ==" 478 " 0x0000ffff\n"); 479 spin_unlock(&dev->se_port_lock); 480 return ERR_PTR(-ENOSPC); 481 } 482 again: 483 /* 484 * Allocate the next RELATIVE TARGET PORT IDENTIFIER for this struct se_device 485 * Here is the table from spc4r17 section 7.7.3.8. 486 * 487 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field 488 * 489 * Code Description 490 * 0h Reserved 491 * 1h Relative port 1, historically known as port A 492 * 2h Relative port 2, historically known as port B 493 * 3h to FFFFh Relative port 3 through 65 535 494 */ 495 port->sep_rtpi = dev->dev_rpti_counter++; 496 if (!port->sep_rtpi) 497 goto again; 498 499 list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) { 500 /* 501 * Make sure RELATIVE TARGET PORT IDENTIFIER is unique 502 * for 16-bit wrap.. 503 */ 504 if (port->sep_rtpi == port_tmp->sep_rtpi) 505 goto again; 506 } 507 spin_unlock(&dev->se_port_lock); 508 509 return port; 510 } 511 512 static void core_export_port( 513 struct se_device *dev, 514 struct se_portal_group *tpg, 515 struct se_port *port, 516 struct se_lun *lun) 517 { 518 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL; 519 520 spin_lock(&dev->se_port_lock); 521 spin_lock(&lun->lun_sep_lock); 522 port->sep_tpg = tpg; 523 port->sep_lun = lun; 524 lun->lun_sep = port; 525 spin_unlock(&lun->lun_sep_lock); 526 527 list_add_tail(&port->sep_list, &dev->dev_sep_list); 528 spin_unlock(&dev->se_port_lock); 529 530 if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV && 531 !(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) { 532 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port); 533 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) { 534 pr_err("Unable to allocate t10_alua_tg_pt" 535 "_gp_member_t\n"); 536 return; 537 } 538 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 539 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem, 540 dev->t10_alua.default_tg_pt_gp); 541 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 542 pr_debug("%s/%s: Adding to default ALUA Target Port" 543 " Group: alua/default_tg_pt_gp\n", 544 dev->transport->name, tpg->se_tpg_tfo->get_fabric_name()); 545 } 546 547 dev->dev_port_count++; 548 port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFIER */ 549 } 550 551 /* 552 * Called with struct se_device->se_port_lock spinlock held. 553 */ 554 static void core_release_port(struct se_device *dev, struct se_port *port) 555 __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock) 556 { 557 /* 558 * Wait for any port reference for PR ALL_TG_PT=1 operation 559 * to complete in __core_scsi3_alloc_registration() 560 */ 561 spin_unlock(&dev->se_port_lock); 562 if (atomic_read(&port->sep_tg_pt_ref_cnt)) 563 cpu_relax(); 564 spin_lock(&dev->se_port_lock); 565 566 core_alua_free_tg_pt_gp_mem(port); 567 568 list_del(&port->sep_list); 569 dev->dev_port_count--; 570 kfree(port); 571 } 572 573 int core_dev_export( 574 struct se_device *dev, 575 struct se_portal_group *tpg, 576 struct se_lun *lun) 577 { 578 struct se_hba *hba = dev->se_hba; 579 struct se_port *port; 580 581 port = core_alloc_port(dev); 582 if (IS_ERR(port)) 583 return PTR_ERR(port); 584 585 lun->lun_se_dev = dev; 586 587 spin_lock(&hba->device_lock); 588 dev->export_count++; 589 spin_unlock(&hba->device_lock); 590 591 core_export_port(dev, tpg, port, lun); 592 return 0; 593 } 594 595 void core_dev_unexport( 596 struct se_device *dev, 597 struct se_portal_group *tpg, 598 struct se_lun *lun) 599 { 600 struct se_hba *hba = dev->se_hba; 601 struct se_port *port = lun->lun_sep; 602 603 spin_lock(&lun->lun_sep_lock); 604 if (lun->lun_se_dev == NULL) { 605 spin_unlock(&lun->lun_sep_lock); 606 return; 607 } 608 spin_unlock(&lun->lun_sep_lock); 609 610 spin_lock(&dev->se_port_lock); 611 core_release_port(dev, port); 612 spin_unlock(&dev->se_port_lock); 613 614 spin_lock(&hba->device_lock); 615 dev->export_count--; 616 spin_unlock(&hba->device_lock); 617 618 lun->lun_sep = NULL; 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 bool se_dev_check_wce(struct se_device *dev) 654 { 655 bool wce = false; 656 657 if (dev->transport->get_write_cache) 658 wce = dev->transport->get_write_cache(dev); 659 else if (dev->dev_attrib.emulate_write_cache > 0) 660 wce = true; 661 662 return wce; 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 EXPORT_SYMBOL(se_dev_set_max_unmap_lba_count); 675 676 int se_dev_set_max_unmap_block_desc_count( 677 struct se_device *dev, 678 u32 max_unmap_block_desc_count) 679 { 680 dev->dev_attrib.max_unmap_block_desc_count = 681 max_unmap_block_desc_count; 682 pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n", 683 dev, dev->dev_attrib.max_unmap_block_desc_count); 684 return 0; 685 } 686 EXPORT_SYMBOL(se_dev_set_max_unmap_block_desc_count); 687 688 int se_dev_set_unmap_granularity( 689 struct se_device *dev, 690 u32 unmap_granularity) 691 { 692 dev->dev_attrib.unmap_granularity = unmap_granularity; 693 pr_debug("dev[%p]: Set unmap_granularity: %u\n", 694 dev, dev->dev_attrib.unmap_granularity); 695 return 0; 696 } 697 EXPORT_SYMBOL(se_dev_set_unmap_granularity); 698 699 int se_dev_set_unmap_granularity_alignment( 700 struct se_device *dev, 701 u32 unmap_granularity_alignment) 702 { 703 dev->dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment; 704 pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n", 705 dev, dev->dev_attrib.unmap_granularity_alignment); 706 return 0; 707 } 708 EXPORT_SYMBOL(se_dev_set_unmap_granularity_alignment); 709 710 int se_dev_set_max_write_same_len( 711 struct se_device *dev, 712 u32 max_write_same_len) 713 { 714 dev->dev_attrib.max_write_same_len = max_write_same_len; 715 pr_debug("dev[%p]: Set max_write_same_len: %u\n", 716 dev, dev->dev_attrib.max_write_same_len); 717 return 0; 718 } 719 EXPORT_SYMBOL(se_dev_set_max_write_same_len); 720 721 static void dev_set_t10_wwn_model_alias(struct se_device *dev) 722 { 723 const char *configname; 724 725 configname = config_item_name(&dev->dev_group.cg_item); 726 if (strlen(configname) >= 16) { 727 pr_warn("dev[%p]: Backstore name '%s' is too long for " 728 "INQUIRY_MODEL, truncating to 16 bytes\n", dev, 729 configname); 730 } 731 snprintf(&dev->t10_wwn.model[0], 16, "%s", configname); 732 } 733 734 int se_dev_set_emulate_model_alias(struct se_device *dev, int flag) 735 { 736 if (dev->export_count) { 737 pr_err("dev[%p]: Unable to change model alias" 738 " while export_count is %d\n", 739 dev, dev->export_count); 740 return -EINVAL; 741 } 742 743 if (flag != 0 && flag != 1) { 744 pr_err("Illegal value %d\n", flag); 745 return -EINVAL; 746 } 747 748 if (flag) { 749 dev_set_t10_wwn_model_alias(dev); 750 } else { 751 strncpy(&dev->t10_wwn.model[0], 752 dev->transport->inquiry_prod, 16); 753 } 754 dev->dev_attrib.emulate_model_alias = flag; 755 756 return 0; 757 } 758 EXPORT_SYMBOL(se_dev_set_emulate_model_alias); 759 760 int se_dev_set_emulate_dpo(struct se_device *dev, int flag) 761 { 762 if (flag != 0 && flag != 1) { 763 pr_err("Illegal value %d\n", flag); 764 return -EINVAL; 765 } 766 767 if (flag) { 768 pr_err("dpo_emulated not supported\n"); 769 return -EINVAL; 770 } 771 772 return 0; 773 } 774 EXPORT_SYMBOL(se_dev_set_emulate_dpo); 775 776 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag) 777 { 778 if (flag != 0 && flag != 1) { 779 pr_err("Illegal value %d\n", flag); 780 return -EINVAL; 781 } 782 if (flag && 783 dev->transport->get_write_cache) { 784 pr_warn("emulate_fua_write not supported for this device, ignoring\n"); 785 return 0; 786 } 787 if (dev->export_count) { 788 pr_err("emulate_fua_write cannot be changed with active" 789 " exports: %d\n", dev->export_count); 790 return -EINVAL; 791 } 792 dev->dev_attrib.emulate_fua_write = flag; 793 pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n", 794 dev, dev->dev_attrib.emulate_fua_write); 795 return 0; 796 } 797 EXPORT_SYMBOL(se_dev_set_emulate_fua_write); 798 799 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag) 800 { 801 if (flag != 0 && flag != 1) { 802 pr_err("Illegal value %d\n", flag); 803 return -EINVAL; 804 } 805 806 if (flag) { 807 pr_err("ua read emulated not supported\n"); 808 return -EINVAL; 809 } 810 811 return 0; 812 } 813 EXPORT_SYMBOL(se_dev_set_emulate_fua_read); 814 815 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag) 816 { 817 if (flag != 0 && flag != 1) { 818 pr_err("Illegal value %d\n", flag); 819 return -EINVAL; 820 } 821 if (flag && 822 dev->transport->get_write_cache) { 823 pr_err("emulate_write_cache not supported for this device\n"); 824 return -EINVAL; 825 } 826 if (dev->export_count) { 827 pr_err("emulate_write_cache cannot be changed with active" 828 " exports: %d\n", dev->export_count); 829 return -EINVAL; 830 } 831 dev->dev_attrib.emulate_write_cache = flag; 832 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 833 dev, dev->dev_attrib.emulate_write_cache); 834 return 0; 835 } 836 EXPORT_SYMBOL(se_dev_set_emulate_write_cache); 837 838 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag) 839 { 840 if ((flag != 0) && (flag != 1) && (flag != 2)) { 841 pr_err("Illegal value %d\n", flag); 842 return -EINVAL; 843 } 844 845 if (dev->export_count) { 846 pr_err("dev[%p]: Unable to change SE Device" 847 " UA_INTRLCK_CTRL while export_count is %d\n", 848 dev, dev->export_count); 849 return -EINVAL; 850 } 851 dev->dev_attrib.emulate_ua_intlck_ctrl = flag; 852 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 853 dev, dev->dev_attrib.emulate_ua_intlck_ctrl); 854 855 return 0; 856 } 857 EXPORT_SYMBOL(se_dev_set_emulate_ua_intlck_ctrl); 858 859 int se_dev_set_emulate_tas(struct se_device *dev, int flag) 860 { 861 if ((flag != 0) && (flag != 1)) { 862 pr_err("Illegal value %d\n", flag); 863 return -EINVAL; 864 } 865 866 if (dev->export_count) { 867 pr_err("dev[%p]: Unable to change SE Device TAS while" 868 " export_count is %d\n", 869 dev, dev->export_count); 870 return -EINVAL; 871 } 872 dev->dev_attrib.emulate_tas = flag; 873 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 874 dev, (dev->dev_attrib.emulate_tas) ? "Enabled" : "Disabled"); 875 876 return 0; 877 } 878 EXPORT_SYMBOL(se_dev_set_emulate_tas); 879 880 int se_dev_set_emulate_tpu(struct se_device *dev, int flag) 881 { 882 if ((flag != 0) && (flag != 1)) { 883 pr_err("Illegal value %d\n", flag); 884 return -EINVAL; 885 } 886 /* 887 * We expect this value to be non-zero when generic Block Layer 888 * Discard supported is detected iblock_create_virtdevice(). 889 */ 890 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) { 891 pr_err("Generic Block Discard not supported\n"); 892 return -ENOSYS; 893 } 894 895 dev->dev_attrib.emulate_tpu = flag; 896 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 897 dev, flag); 898 return 0; 899 } 900 EXPORT_SYMBOL(se_dev_set_emulate_tpu); 901 902 int se_dev_set_emulate_tpws(struct se_device *dev, int flag) 903 { 904 if ((flag != 0) && (flag != 1)) { 905 pr_err("Illegal value %d\n", flag); 906 return -EINVAL; 907 } 908 /* 909 * We expect this value to be non-zero when generic Block Layer 910 * Discard supported is detected iblock_create_virtdevice(). 911 */ 912 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) { 913 pr_err("Generic Block Discard not supported\n"); 914 return -ENOSYS; 915 } 916 917 dev->dev_attrib.emulate_tpws = flag; 918 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 919 dev, flag); 920 return 0; 921 } 922 EXPORT_SYMBOL(se_dev_set_emulate_tpws); 923 924 int se_dev_set_emulate_caw(struct se_device *dev, int flag) 925 { 926 if (flag != 0 && flag != 1) { 927 pr_err("Illegal value %d\n", flag); 928 return -EINVAL; 929 } 930 dev->dev_attrib.emulate_caw = flag; 931 pr_debug("dev[%p]: SE Device CompareAndWrite (AtomicTestandSet): %d\n", 932 dev, flag); 933 934 return 0; 935 } 936 EXPORT_SYMBOL(se_dev_set_emulate_caw); 937 938 int se_dev_set_emulate_3pc(struct se_device *dev, int flag) 939 { 940 if (flag != 0 && flag != 1) { 941 pr_err("Illegal value %d\n", flag); 942 return -EINVAL; 943 } 944 dev->dev_attrib.emulate_3pc = flag; 945 pr_debug("dev[%p]: SE Device 3rd Party Copy (EXTENDED_COPY): %d\n", 946 dev, flag); 947 948 return 0; 949 } 950 EXPORT_SYMBOL(se_dev_set_emulate_3pc); 951 952 int se_dev_set_pi_prot_type(struct se_device *dev, int flag) 953 { 954 int rc, old_prot = dev->dev_attrib.pi_prot_type; 955 956 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) { 957 pr_err("Illegal value %d for pi_prot_type\n", flag); 958 return -EINVAL; 959 } 960 if (flag == 2) { 961 pr_err("DIF TYPE2 protection currently not supported\n"); 962 return -ENOSYS; 963 } 964 if (dev->dev_attrib.hw_pi_prot_type) { 965 pr_warn("DIF protection enabled on underlying hardware," 966 " ignoring\n"); 967 return 0; 968 } 969 if (!dev->transport->init_prot || !dev->transport->free_prot) { 970 /* 0 is only allowed value for non-supporting backends */ 971 if (flag == 0) 972 return 0; 973 974 pr_err("DIF protection not supported by backend: %s\n", 975 dev->transport->name); 976 return -ENOSYS; 977 } 978 if (!(dev->dev_flags & DF_CONFIGURED)) { 979 pr_err("DIF protection requires device to be configured\n"); 980 return -ENODEV; 981 } 982 if (dev->export_count) { 983 pr_err("dev[%p]: Unable to change SE Device PROT type while" 984 " export_count is %d\n", dev, dev->export_count); 985 return -EINVAL; 986 } 987 988 dev->dev_attrib.pi_prot_type = flag; 989 990 if (flag && !old_prot) { 991 rc = dev->transport->init_prot(dev); 992 if (rc) { 993 dev->dev_attrib.pi_prot_type = old_prot; 994 return rc; 995 } 996 997 } else if (!flag && old_prot) { 998 dev->transport->free_prot(dev); 999 } 1000 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag); 1001 1002 return 0; 1003 } 1004 EXPORT_SYMBOL(se_dev_set_pi_prot_type); 1005 1006 int se_dev_set_pi_prot_format(struct se_device *dev, int flag) 1007 { 1008 int rc; 1009 1010 if (!flag) 1011 return 0; 1012 1013 if (flag != 1) { 1014 pr_err("Illegal value %d for pi_prot_format\n", flag); 1015 return -EINVAL; 1016 } 1017 if (!dev->transport->format_prot) { 1018 pr_err("DIF protection format not supported by backend %s\n", 1019 dev->transport->name); 1020 return -ENOSYS; 1021 } 1022 if (!(dev->dev_flags & DF_CONFIGURED)) { 1023 pr_err("DIF protection format requires device to be configured\n"); 1024 return -ENODEV; 1025 } 1026 if (dev->export_count) { 1027 pr_err("dev[%p]: Unable to format SE Device PROT type while" 1028 " export_count is %d\n", dev, dev->export_count); 1029 return -EINVAL; 1030 } 1031 1032 rc = dev->transport->format_prot(dev); 1033 if (rc) 1034 return rc; 1035 1036 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev); 1037 1038 return 0; 1039 } 1040 EXPORT_SYMBOL(se_dev_set_pi_prot_format); 1041 1042 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag) 1043 { 1044 if ((flag != 0) && (flag != 1)) { 1045 pr_err("Illegal value %d\n", flag); 1046 return -EINVAL; 1047 } 1048 dev->dev_attrib.enforce_pr_isids = flag; 1049 pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev, 1050 (dev->dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled"); 1051 return 0; 1052 } 1053 EXPORT_SYMBOL(se_dev_set_enforce_pr_isids); 1054 1055 int se_dev_set_force_pr_aptpl(struct se_device *dev, int flag) 1056 { 1057 if ((flag != 0) && (flag != 1)) { 1058 printk(KERN_ERR "Illegal value %d\n", flag); 1059 return -EINVAL; 1060 } 1061 if (dev->export_count) { 1062 pr_err("dev[%p]: Unable to set force_pr_aptpl while" 1063 " export_count is %d\n", dev, dev->export_count); 1064 return -EINVAL; 1065 } 1066 1067 dev->dev_attrib.force_pr_aptpl = flag; 1068 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", dev, flag); 1069 return 0; 1070 } 1071 EXPORT_SYMBOL(se_dev_set_force_pr_aptpl); 1072 1073 int se_dev_set_is_nonrot(struct se_device *dev, int flag) 1074 { 1075 if ((flag != 0) && (flag != 1)) { 1076 printk(KERN_ERR "Illegal value %d\n", flag); 1077 return -EINVAL; 1078 } 1079 dev->dev_attrib.is_nonrot = flag; 1080 pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n", 1081 dev, flag); 1082 return 0; 1083 } 1084 EXPORT_SYMBOL(se_dev_set_is_nonrot); 1085 1086 int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag) 1087 { 1088 if (flag != 0) { 1089 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted" 1090 " reordering not implemented\n", dev); 1091 return -ENOSYS; 1092 } 1093 dev->dev_attrib.emulate_rest_reord = flag; 1094 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag); 1095 return 0; 1096 } 1097 EXPORT_SYMBOL(se_dev_set_emulate_rest_reord); 1098 1099 /* 1100 * Note, this can only be called on unexported SE Device Object. 1101 */ 1102 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth) 1103 { 1104 if (dev->export_count) { 1105 pr_err("dev[%p]: Unable to change SE Device TCQ while" 1106 " export_count is %d\n", 1107 dev, dev->export_count); 1108 return -EINVAL; 1109 } 1110 if (!queue_depth) { 1111 pr_err("dev[%p]: Illegal ZERO value for queue" 1112 "_depth\n", dev); 1113 return -EINVAL; 1114 } 1115 1116 if (queue_depth > dev->dev_attrib.queue_depth) { 1117 if (queue_depth > dev->dev_attrib.hw_queue_depth) { 1118 pr_err("dev[%p]: Passed queue_depth:" 1119 " %u exceeds TCM/SE_Device MAX" 1120 " TCQ: %u\n", dev, queue_depth, 1121 dev->dev_attrib.hw_queue_depth); 1122 return -EINVAL; 1123 } 1124 } 1125 dev->dev_attrib.queue_depth = dev->queue_depth = queue_depth; 1126 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", 1127 dev, queue_depth); 1128 return 0; 1129 } 1130 EXPORT_SYMBOL(se_dev_set_queue_depth); 1131 1132 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors) 1133 { 1134 if (dev->export_count) { 1135 pr_err("dev[%p]: Unable to change SE Device" 1136 " optimal_sectors while export_count is %d\n", 1137 dev, dev->export_count); 1138 return -EINVAL; 1139 } 1140 if (optimal_sectors > dev->dev_attrib.hw_max_sectors) { 1141 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1142 " greater than hw_max_sectors: %u\n", dev, 1143 optimal_sectors, dev->dev_attrib.hw_max_sectors); 1144 return -EINVAL; 1145 } 1146 1147 dev->dev_attrib.optimal_sectors = optimal_sectors; 1148 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1149 dev, optimal_sectors); 1150 return 0; 1151 } 1152 EXPORT_SYMBOL(se_dev_set_optimal_sectors); 1153 1154 int se_dev_set_block_size(struct se_device *dev, u32 block_size) 1155 { 1156 if (dev->export_count) { 1157 pr_err("dev[%p]: Unable to change SE Device block_size" 1158 " while export_count is %d\n", 1159 dev, dev->export_count); 1160 return -EINVAL; 1161 } 1162 1163 if ((block_size != 512) && 1164 (block_size != 1024) && 1165 (block_size != 2048) && 1166 (block_size != 4096)) { 1167 pr_err("dev[%p]: Illegal value for block_device: %u" 1168 " for SE device, must be 512, 1024, 2048 or 4096\n", 1169 dev, block_size); 1170 return -EINVAL; 1171 } 1172 1173 dev->dev_attrib.block_size = block_size; 1174 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1175 dev, block_size); 1176 1177 if (dev->dev_attrib.max_bytes_per_io) 1178 dev->dev_attrib.hw_max_sectors = 1179 dev->dev_attrib.max_bytes_per_io / block_size; 1180 1181 return 0; 1182 } 1183 EXPORT_SYMBOL(se_dev_set_block_size); 1184 1185 struct se_lun *core_dev_add_lun( 1186 struct se_portal_group *tpg, 1187 struct se_device *dev, 1188 u32 unpacked_lun) 1189 { 1190 struct se_lun *lun; 1191 int rc; 1192 1193 lun = core_tpg_alloc_lun(tpg, unpacked_lun); 1194 if (IS_ERR(lun)) 1195 return lun; 1196 1197 rc = core_tpg_add_lun(tpg, lun, 1198 TRANSPORT_LUNFLAGS_READ_WRITE, dev); 1199 if (rc < 0) 1200 return ERR_PTR(rc); 1201 1202 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from" 1203 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1204 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, 1205 tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id); 1206 /* 1207 * Update LUN maps for dynamically added initiators when 1208 * generate_node_acl is enabled. 1209 */ 1210 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) { 1211 struct se_node_acl *acl; 1212 spin_lock_irq(&tpg->acl_node_lock); 1213 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { 1214 if (acl->dynamic_node_acl && 1215 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only || 1216 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) { 1217 spin_unlock_irq(&tpg->acl_node_lock); 1218 core_tpg_add_node_to_devs(acl, tpg); 1219 spin_lock_irq(&tpg->acl_node_lock); 1220 } 1221 } 1222 spin_unlock_irq(&tpg->acl_node_lock); 1223 } 1224 1225 return lun; 1226 } 1227 1228 /* core_dev_del_lun(): 1229 * 1230 * 1231 */ 1232 void core_dev_del_lun( 1233 struct se_portal_group *tpg, 1234 struct se_lun *lun) 1235 { 1236 pr_debug("%s_TPG[%u]_LUN[%u] - Deactivating %s Logical Unit from" 1237 " device object\n", tpg->se_tpg_tfo->get_fabric_name(), 1238 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, 1239 tpg->se_tpg_tfo->get_fabric_name()); 1240 1241 core_tpg_remove_lun(tpg, lun); 1242 } 1243 1244 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun) 1245 { 1246 struct se_lun *lun; 1247 1248 spin_lock(&tpg->tpg_lun_lock); 1249 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1250 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS" 1251 "_PER_TPG-1: %u for Target Portal Group: %hu\n", 1252 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1253 TRANSPORT_MAX_LUNS_PER_TPG-1, 1254 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1255 spin_unlock(&tpg->tpg_lun_lock); 1256 return NULL; 1257 } 1258 lun = tpg->tpg_lun_list[unpacked_lun]; 1259 1260 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) { 1261 pr_err("%s Logical Unit Number: %u is not free on" 1262 " Target Portal Group: %hu, ignoring request.\n", 1263 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1264 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1265 spin_unlock(&tpg->tpg_lun_lock); 1266 return NULL; 1267 } 1268 spin_unlock(&tpg->tpg_lun_lock); 1269 1270 return lun; 1271 } 1272 1273 /* core_dev_get_lun(): 1274 * 1275 * 1276 */ 1277 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun) 1278 { 1279 struct se_lun *lun; 1280 1281 spin_lock(&tpg->tpg_lun_lock); 1282 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1283 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER" 1284 "_TPG-1: %u for Target Portal Group: %hu\n", 1285 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1286 TRANSPORT_MAX_LUNS_PER_TPG-1, 1287 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1288 spin_unlock(&tpg->tpg_lun_lock); 1289 return NULL; 1290 } 1291 lun = tpg->tpg_lun_list[unpacked_lun]; 1292 1293 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { 1294 pr_err("%s Logical Unit Number: %u is not active on" 1295 " Target Portal Group: %hu, ignoring request.\n", 1296 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1297 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1298 spin_unlock(&tpg->tpg_lun_lock); 1299 return NULL; 1300 } 1301 spin_unlock(&tpg->tpg_lun_lock); 1302 1303 return lun; 1304 } 1305 1306 struct se_lun_acl *core_dev_init_initiator_node_lun_acl( 1307 struct se_portal_group *tpg, 1308 struct se_node_acl *nacl, 1309 u32 mapped_lun, 1310 int *ret) 1311 { 1312 struct se_lun_acl *lacl; 1313 1314 if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) { 1315 pr_err("%s InitiatorName exceeds maximum size.\n", 1316 tpg->se_tpg_tfo->get_fabric_name()); 1317 *ret = -EOVERFLOW; 1318 return NULL; 1319 } 1320 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL); 1321 if (!lacl) { 1322 pr_err("Unable to allocate memory for struct se_lun_acl.\n"); 1323 *ret = -ENOMEM; 1324 return NULL; 1325 } 1326 1327 INIT_LIST_HEAD(&lacl->lacl_list); 1328 lacl->mapped_lun = mapped_lun; 1329 lacl->se_lun_nacl = nacl; 1330 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", 1331 nacl->initiatorname); 1332 1333 return lacl; 1334 } 1335 1336 int core_dev_add_initiator_node_lun_acl( 1337 struct se_portal_group *tpg, 1338 struct se_lun_acl *lacl, 1339 u32 unpacked_lun, 1340 u32 lun_access) 1341 { 1342 struct se_lun *lun; 1343 struct se_node_acl *nacl; 1344 1345 lun = core_dev_get_lun(tpg, unpacked_lun); 1346 if (!lun) { 1347 pr_err("%s Logical Unit Number: %u is not active on" 1348 " Target Portal Group: %hu, ignoring request.\n", 1349 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1350 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1351 return -EINVAL; 1352 } 1353 1354 nacl = lacl->se_lun_nacl; 1355 if (!nacl) 1356 return -EINVAL; 1357 1358 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) && 1359 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE)) 1360 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; 1361 1362 lacl->se_lun = lun; 1363 1364 if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun, 1365 lun_access, nacl, tpg) < 0) 1366 return -EINVAL; 1367 1368 spin_lock(&lun->lun_acl_lock); 1369 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list); 1370 atomic_inc_mb(&lun->lun_acl_count); 1371 spin_unlock(&lun->lun_acl_lock); 1372 1373 pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for " 1374 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(), 1375 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun, 1376 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO", 1377 lacl->initiatorname); 1378 /* 1379 * Check to see if there are any existing persistent reservation APTPL 1380 * pre-registrations that need to be enabled for this LUN ACL.. 1381 */ 1382 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, nacl, 1383 lacl->mapped_lun); 1384 return 0; 1385 } 1386 1387 /* core_dev_del_initiator_node_lun_acl(): 1388 * 1389 * 1390 */ 1391 int core_dev_del_initiator_node_lun_acl( 1392 struct se_portal_group *tpg, 1393 struct se_lun *lun, 1394 struct se_lun_acl *lacl) 1395 { 1396 struct se_node_acl *nacl; 1397 1398 nacl = lacl->se_lun_nacl; 1399 if (!nacl) 1400 return -EINVAL; 1401 1402 spin_lock(&lun->lun_acl_lock); 1403 list_del(&lacl->lacl_list); 1404 atomic_dec_mb(&lun->lun_acl_count); 1405 spin_unlock(&lun->lun_acl_lock); 1406 1407 core_disable_device_list_for_node(lun, NULL, lacl->mapped_lun, 1408 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg); 1409 1410 lacl->se_lun = NULL; 1411 1412 pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for" 1413 " InitiatorNode: %s Mapped LUN: %u\n", 1414 tpg->se_tpg_tfo->get_fabric_name(), 1415 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, 1416 lacl->initiatorname, lacl->mapped_lun); 1417 1418 return 0; 1419 } 1420 1421 void core_dev_free_initiator_node_lun_acl( 1422 struct se_portal_group *tpg, 1423 struct se_lun_acl *lacl) 1424 { 1425 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s" 1426 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1427 tpg->se_tpg_tfo->tpg_get_tag(tpg), 1428 tpg->se_tpg_tfo->get_fabric_name(), 1429 lacl->initiatorname, lacl->mapped_lun); 1430 1431 kfree(lacl); 1432 } 1433 1434 static void scsi_dump_inquiry(struct se_device *dev) 1435 { 1436 struct t10_wwn *wwn = &dev->t10_wwn; 1437 char buf[17]; 1438 int i, device_type; 1439 /* 1440 * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer 1441 */ 1442 for (i = 0; i < 8; i++) 1443 if (wwn->vendor[i] >= 0x20) 1444 buf[i] = wwn->vendor[i]; 1445 else 1446 buf[i] = ' '; 1447 buf[i] = '\0'; 1448 pr_debug(" Vendor: %s\n", buf); 1449 1450 for (i = 0; i < 16; i++) 1451 if (wwn->model[i] >= 0x20) 1452 buf[i] = wwn->model[i]; 1453 else 1454 buf[i] = ' '; 1455 buf[i] = '\0'; 1456 pr_debug(" Model: %s\n", buf); 1457 1458 for (i = 0; i < 4; i++) 1459 if (wwn->revision[i] >= 0x20) 1460 buf[i] = wwn->revision[i]; 1461 else 1462 buf[i] = ' '; 1463 buf[i] = '\0'; 1464 pr_debug(" Revision: %s\n", buf); 1465 1466 device_type = dev->transport->get_device_type(dev); 1467 pr_debug(" Type: %s ", scsi_device_type(device_type)); 1468 } 1469 1470 struct se_device *target_alloc_device(struct se_hba *hba, const char *name) 1471 { 1472 struct se_device *dev; 1473 struct se_lun *xcopy_lun; 1474 1475 dev = hba->transport->alloc_device(hba, name); 1476 if (!dev) 1477 return NULL; 1478 1479 dev->dev_link_magic = SE_DEV_LINK_MAGIC; 1480 dev->se_hba = hba; 1481 dev->transport = hba->transport; 1482 dev->prot_length = sizeof(struct se_dif_v1_tuple); 1483 1484 INIT_LIST_HEAD(&dev->dev_list); 1485 INIT_LIST_HEAD(&dev->dev_sep_list); 1486 INIT_LIST_HEAD(&dev->dev_tmr_list); 1487 INIT_LIST_HEAD(&dev->delayed_cmd_list); 1488 INIT_LIST_HEAD(&dev->state_list); 1489 INIT_LIST_HEAD(&dev->qf_cmd_list); 1490 INIT_LIST_HEAD(&dev->g_dev_node); 1491 spin_lock_init(&dev->execute_task_lock); 1492 spin_lock_init(&dev->delayed_cmd_lock); 1493 spin_lock_init(&dev->dev_reservation_lock); 1494 spin_lock_init(&dev->se_port_lock); 1495 spin_lock_init(&dev->se_tmr_lock); 1496 spin_lock_init(&dev->qf_cmd_lock); 1497 sema_init(&dev->caw_sem, 1); 1498 atomic_set(&dev->dev_ordered_id, 0); 1499 INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list); 1500 spin_lock_init(&dev->t10_wwn.t10_vpd_lock); 1501 INIT_LIST_HEAD(&dev->t10_pr.registration_list); 1502 INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list); 1503 spin_lock_init(&dev->t10_pr.registration_lock); 1504 spin_lock_init(&dev->t10_pr.aptpl_reg_lock); 1505 INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list); 1506 spin_lock_init(&dev->t10_alua.tg_pt_gps_lock); 1507 INIT_LIST_HEAD(&dev->t10_alua.lba_map_list); 1508 spin_lock_init(&dev->t10_alua.lba_map_lock); 1509 1510 dev->t10_wwn.t10_dev = dev; 1511 dev->t10_alua.t10_dev = dev; 1512 1513 dev->dev_attrib.da_dev = dev; 1514 dev->dev_attrib.emulate_model_alias = DA_EMULATE_MODEL_ALIAS; 1515 dev->dev_attrib.emulate_dpo = DA_EMULATE_DPO; 1516 dev->dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE; 1517 dev->dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ; 1518 dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE; 1519 dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL; 1520 dev->dev_attrib.emulate_tas = DA_EMULATE_TAS; 1521 dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU; 1522 dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS; 1523 dev->dev_attrib.emulate_caw = DA_EMULATE_CAW; 1524 dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC; 1525 dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE0_PROT; 1526 dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS; 1527 dev->dev_attrib.force_pr_aptpl = DA_FORCE_PR_APTPL; 1528 dev->dev_attrib.is_nonrot = DA_IS_NONROT; 1529 dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD; 1530 dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT; 1531 dev->dev_attrib.max_unmap_block_desc_count = 1532 DA_MAX_UNMAP_BLOCK_DESC_COUNT; 1533 dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT; 1534 dev->dev_attrib.unmap_granularity_alignment = 1535 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT; 1536 dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN; 1537 1538 xcopy_lun = &dev->xcopy_lun; 1539 xcopy_lun->lun_se_dev = dev; 1540 init_completion(&xcopy_lun->lun_shutdown_comp); 1541 INIT_LIST_HEAD(&xcopy_lun->lun_acl_list); 1542 spin_lock_init(&xcopy_lun->lun_acl_lock); 1543 spin_lock_init(&xcopy_lun->lun_sep_lock); 1544 init_completion(&xcopy_lun->lun_ref_comp); 1545 1546 return dev; 1547 } 1548 1549 int target_configure_device(struct se_device *dev) 1550 { 1551 struct se_hba *hba = dev->se_hba; 1552 int ret; 1553 1554 if (dev->dev_flags & DF_CONFIGURED) { 1555 pr_err("se_dev->se_dev_ptr already set for storage" 1556 " object\n"); 1557 return -EEXIST; 1558 } 1559 1560 ret = dev->transport->configure_device(dev); 1561 if (ret) 1562 goto out; 1563 /* 1564 * XXX: there is not much point to have two different values here.. 1565 */ 1566 dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size; 1567 dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth; 1568 1569 /* 1570 * Align max_hw_sectors down to PAGE_SIZE I/O transfers 1571 */ 1572 dev->dev_attrib.hw_max_sectors = 1573 se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors, 1574 dev->dev_attrib.hw_block_size); 1575 dev->dev_attrib.optimal_sectors = dev->dev_attrib.hw_max_sectors; 1576 1577 dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX); 1578 dev->creation_time = get_jiffies_64(); 1579 1580 ret = core_setup_alua(dev); 1581 if (ret) 1582 goto out; 1583 1584 /* 1585 * Startup the struct se_device processing thread 1586 */ 1587 dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1, 1588 dev->transport->name); 1589 if (!dev->tmr_wq) { 1590 pr_err("Unable to create tmr workqueue for %s\n", 1591 dev->transport->name); 1592 ret = -ENOMEM; 1593 goto out_free_alua; 1594 } 1595 1596 /* 1597 * Setup work_queue for QUEUE_FULL 1598 */ 1599 INIT_WORK(&dev->qf_work_queue, target_qf_do_work); 1600 1601 /* 1602 * Preload the initial INQUIRY const values if we are doing 1603 * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI 1604 * passthrough because this is being provided by the backend LLD. 1605 */ 1606 if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) { 1607 strncpy(&dev->t10_wwn.vendor[0], "LIO-ORG", 8); 1608 strncpy(&dev->t10_wwn.model[0], 1609 dev->transport->inquiry_prod, 16); 1610 strncpy(&dev->t10_wwn.revision[0], 1611 dev->transport->inquiry_rev, 4); 1612 } 1613 1614 scsi_dump_inquiry(dev); 1615 1616 spin_lock(&hba->device_lock); 1617 hba->dev_count++; 1618 spin_unlock(&hba->device_lock); 1619 1620 mutex_lock(&g_device_mutex); 1621 list_add_tail(&dev->g_dev_node, &g_device_list); 1622 mutex_unlock(&g_device_mutex); 1623 1624 dev->dev_flags |= DF_CONFIGURED; 1625 1626 return 0; 1627 1628 out_free_alua: 1629 core_alua_free_lu_gp_mem(dev); 1630 out: 1631 se_release_vpd_for_dev(dev); 1632 return ret; 1633 } 1634 1635 void target_free_device(struct se_device *dev) 1636 { 1637 struct se_hba *hba = dev->se_hba; 1638 1639 WARN_ON(!list_empty(&dev->dev_sep_list)); 1640 1641 if (dev->dev_flags & DF_CONFIGURED) { 1642 destroy_workqueue(dev->tmr_wq); 1643 1644 mutex_lock(&g_device_mutex); 1645 list_del(&dev->g_dev_node); 1646 mutex_unlock(&g_device_mutex); 1647 1648 spin_lock(&hba->device_lock); 1649 hba->dev_count--; 1650 spin_unlock(&hba->device_lock); 1651 } 1652 1653 core_alua_free_lu_gp_mem(dev); 1654 core_alua_set_lba_map(dev, NULL, 0, 0); 1655 core_scsi3_free_all_registrations(dev); 1656 se_release_vpd_for_dev(dev); 1657 1658 if (dev->transport->free_prot) 1659 dev->transport->free_prot(dev); 1660 1661 dev->transport->free_device(dev); 1662 } 1663 1664 int core_dev_setup_virtual_lun0(void) 1665 { 1666 struct se_hba *hba; 1667 struct se_device *dev; 1668 char buf[] = "rd_pages=8,rd_nullio=1"; 1669 int ret; 1670 1671 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE); 1672 if (IS_ERR(hba)) 1673 return PTR_ERR(hba); 1674 1675 dev = target_alloc_device(hba, "virt_lun0"); 1676 if (!dev) { 1677 ret = -ENOMEM; 1678 goto out_free_hba; 1679 } 1680 1681 hba->transport->set_configfs_dev_params(dev, buf, sizeof(buf)); 1682 1683 ret = target_configure_device(dev); 1684 if (ret) 1685 goto out_free_se_dev; 1686 1687 lun0_hba = hba; 1688 g_lun0_dev = dev; 1689 return 0; 1690 1691 out_free_se_dev: 1692 target_free_device(dev); 1693 out_free_hba: 1694 core_delete_hba(hba); 1695 return ret; 1696 } 1697 1698 1699 void core_dev_release_virtual_lun0(void) 1700 { 1701 struct se_hba *hba = lun0_hba; 1702 1703 if (!hba) 1704 return; 1705 1706 if (g_lun0_dev) 1707 target_free_device(g_lun0_dev); 1708 core_delete_hba(hba); 1709 } 1710