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 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 EXPORT_SYMBOL(se_dev_set_max_unmap_lba_count); 663 664 int se_dev_set_max_unmap_block_desc_count( 665 struct se_device *dev, 666 u32 max_unmap_block_desc_count) 667 { 668 dev->dev_attrib.max_unmap_block_desc_count = 669 max_unmap_block_desc_count; 670 pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n", 671 dev, dev->dev_attrib.max_unmap_block_desc_count); 672 return 0; 673 } 674 EXPORT_SYMBOL(se_dev_set_max_unmap_block_desc_count); 675 676 int se_dev_set_unmap_granularity( 677 struct se_device *dev, 678 u32 unmap_granularity) 679 { 680 dev->dev_attrib.unmap_granularity = unmap_granularity; 681 pr_debug("dev[%p]: Set unmap_granularity: %u\n", 682 dev, dev->dev_attrib.unmap_granularity); 683 return 0; 684 } 685 EXPORT_SYMBOL(se_dev_set_unmap_granularity); 686 687 int se_dev_set_unmap_granularity_alignment( 688 struct se_device *dev, 689 u32 unmap_granularity_alignment) 690 { 691 dev->dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment; 692 pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n", 693 dev, dev->dev_attrib.unmap_granularity_alignment); 694 return 0; 695 } 696 EXPORT_SYMBOL(se_dev_set_unmap_granularity_alignment); 697 698 int se_dev_set_max_write_same_len( 699 struct se_device *dev, 700 u32 max_write_same_len) 701 { 702 dev->dev_attrib.max_write_same_len = max_write_same_len; 703 pr_debug("dev[%p]: Set max_write_same_len: %u\n", 704 dev, dev->dev_attrib.max_write_same_len); 705 return 0; 706 } 707 EXPORT_SYMBOL(se_dev_set_max_write_same_len); 708 709 static void dev_set_t10_wwn_model_alias(struct se_device *dev) 710 { 711 const char *configname; 712 713 configname = config_item_name(&dev->dev_group.cg_item); 714 if (strlen(configname) >= 16) { 715 pr_warn("dev[%p]: Backstore name '%s' is too long for " 716 "INQUIRY_MODEL, truncating to 16 bytes\n", dev, 717 configname); 718 } 719 snprintf(&dev->t10_wwn.model[0], 16, "%s", configname); 720 } 721 722 int se_dev_set_emulate_model_alias(struct se_device *dev, int flag) 723 { 724 if (dev->export_count) { 725 pr_err("dev[%p]: Unable to change model alias" 726 " while export_count is %d\n", 727 dev, dev->export_count); 728 return -EINVAL; 729 } 730 731 if (flag != 0 && flag != 1) { 732 pr_err("Illegal value %d\n", flag); 733 return -EINVAL; 734 } 735 736 if (flag) { 737 dev_set_t10_wwn_model_alias(dev); 738 } else { 739 strncpy(&dev->t10_wwn.model[0], 740 dev->transport->inquiry_prod, 16); 741 } 742 dev->dev_attrib.emulate_model_alias = flag; 743 744 return 0; 745 } 746 EXPORT_SYMBOL(se_dev_set_emulate_model_alias); 747 748 int se_dev_set_emulate_dpo(struct se_device *dev, int flag) 749 { 750 if (flag != 0 && flag != 1) { 751 pr_err("Illegal value %d\n", flag); 752 return -EINVAL; 753 } 754 755 if (flag) { 756 pr_err("dpo_emulated not supported\n"); 757 return -EINVAL; 758 } 759 760 return 0; 761 } 762 EXPORT_SYMBOL(se_dev_set_emulate_dpo); 763 764 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag) 765 { 766 if (flag != 0 && flag != 1) { 767 pr_err("Illegal value %d\n", flag); 768 return -EINVAL; 769 } 770 dev->dev_attrib.emulate_fua_write = flag; 771 pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n", 772 dev, dev->dev_attrib.emulate_fua_write); 773 return 0; 774 } 775 EXPORT_SYMBOL(se_dev_set_emulate_fua_write); 776 777 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag) 778 { 779 if (flag != 0 && flag != 1) { 780 pr_err("Illegal value %d\n", flag); 781 return -EINVAL; 782 } 783 784 if (flag) { 785 pr_err("ua read emulated not supported\n"); 786 return -EINVAL; 787 } 788 789 return 0; 790 } 791 EXPORT_SYMBOL(se_dev_set_emulate_fua_read); 792 793 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag) 794 { 795 if (flag != 0 && flag != 1) { 796 pr_err("Illegal value %d\n", flag); 797 return -EINVAL; 798 } 799 if (flag && 800 dev->transport->get_write_cache) { 801 pr_err("emulate_write_cache not supported for this device\n"); 802 return -EINVAL; 803 } 804 805 dev->dev_attrib.emulate_write_cache = flag; 806 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 807 dev, dev->dev_attrib.emulate_write_cache); 808 return 0; 809 } 810 EXPORT_SYMBOL(se_dev_set_emulate_write_cache); 811 812 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag) 813 { 814 if ((flag != 0) && (flag != 1) && (flag != 2)) { 815 pr_err("Illegal value %d\n", flag); 816 return -EINVAL; 817 } 818 819 if (dev->export_count) { 820 pr_err("dev[%p]: Unable to change SE Device" 821 " UA_INTRLCK_CTRL while export_count is %d\n", 822 dev, dev->export_count); 823 return -EINVAL; 824 } 825 dev->dev_attrib.emulate_ua_intlck_ctrl = flag; 826 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 827 dev, dev->dev_attrib.emulate_ua_intlck_ctrl); 828 829 return 0; 830 } 831 EXPORT_SYMBOL(se_dev_set_emulate_ua_intlck_ctrl); 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 EXPORT_SYMBOL(se_dev_set_emulate_tas); 853 854 int se_dev_set_emulate_tpu(struct se_device *dev, int flag) 855 { 856 if ((flag != 0) && (flag != 1)) { 857 pr_err("Illegal value %d\n", flag); 858 return -EINVAL; 859 } 860 /* 861 * We expect this value to be non-zero when generic Block Layer 862 * Discard supported is detected iblock_create_virtdevice(). 863 */ 864 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) { 865 pr_err("Generic Block Discard not supported\n"); 866 return -ENOSYS; 867 } 868 869 dev->dev_attrib.emulate_tpu = flag; 870 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 871 dev, flag); 872 return 0; 873 } 874 EXPORT_SYMBOL(se_dev_set_emulate_tpu); 875 876 int se_dev_set_emulate_tpws(struct se_device *dev, int flag) 877 { 878 if ((flag != 0) && (flag != 1)) { 879 pr_err("Illegal value %d\n", flag); 880 return -EINVAL; 881 } 882 /* 883 * We expect this value to be non-zero when generic Block Layer 884 * Discard supported is detected iblock_create_virtdevice(). 885 */ 886 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) { 887 pr_err("Generic Block Discard not supported\n"); 888 return -ENOSYS; 889 } 890 891 dev->dev_attrib.emulate_tpws = flag; 892 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 893 dev, flag); 894 return 0; 895 } 896 EXPORT_SYMBOL(se_dev_set_emulate_tpws); 897 898 int se_dev_set_emulate_caw(struct se_device *dev, int flag) 899 { 900 if (flag != 0 && flag != 1) { 901 pr_err("Illegal value %d\n", flag); 902 return -EINVAL; 903 } 904 dev->dev_attrib.emulate_caw = flag; 905 pr_debug("dev[%p]: SE Device CompareAndWrite (AtomicTestandSet): %d\n", 906 dev, flag); 907 908 return 0; 909 } 910 EXPORT_SYMBOL(se_dev_set_emulate_caw); 911 912 int se_dev_set_emulate_3pc(struct se_device *dev, int flag) 913 { 914 if (flag != 0 && flag != 1) { 915 pr_err("Illegal value %d\n", flag); 916 return -EINVAL; 917 } 918 dev->dev_attrib.emulate_3pc = flag; 919 pr_debug("dev[%p]: SE Device 3rd Party Copy (EXTENDED_COPY): %d\n", 920 dev, flag); 921 922 return 0; 923 } 924 EXPORT_SYMBOL(se_dev_set_emulate_3pc); 925 926 int se_dev_set_pi_prot_type(struct se_device *dev, int flag) 927 { 928 int rc, old_prot = dev->dev_attrib.pi_prot_type; 929 930 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) { 931 pr_err("Illegal value %d for pi_prot_type\n", flag); 932 return -EINVAL; 933 } 934 if (flag == 2) { 935 pr_err("DIF TYPE2 protection currently not supported\n"); 936 return -ENOSYS; 937 } 938 if (dev->dev_attrib.hw_pi_prot_type) { 939 pr_warn("DIF protection enabled on underlying hardware," 940 " ignoring\n"); 941 return 0; 942 } 943 if (!dev->transport->init_prot || !dev->transport->free_prot) { 944 /* 0 is only allowed value for non-supporting backends */ 945 if (flag == 0) 946 return 0; 947 948 pr_err("DIF protection not supported by backend: %s\n", 949 dev->transport->name); 950 return -ENOSYS; 951 } 952 if (!(dev->dev_flags & DF_CONFIGURED)) { 953 pr_err("DIF protection requires device to be configured\n"); 954 return -ENODEV; 955 } 956 if (dev->export_count) { 957 pr_err("dev[%p]: Unable to change SE Device PROT type while" 958 " export_count is %d\n", dev, dev->export_count); 959 return -EINVAL; 960 } 961 962 dev->dev_attrib.pi_prot_type = flag; 963 964 if (flag && !old_prot) { 965 rc = dev->transport->init_prot(dev); 966 if (rc) { 967 dev->dev_attrib.pi_prot_type = old_prot; 968 return rc; 969 } 970 971 } else if (!flag && old_prot) { 972 dev->transport->free_prot(dev); 973 } 974 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag); 975 976 return 0; 977 } 978 EXPORT_SYMBOL(se_dev_set_pi_prot_type); 979 980 int se_dev_set_pi_prot_format(struct se_device *dev, int flag) 981 { 982 int rc; 983 984 if (!flag) 985 return 0; 986 987 if (flag != 1) { 988 pr_err("Illegal value %d for pi_prot_format\n", flag); 989 return -EINVAL; 990 } 991 if (!dev->transport->format_prot) { 992 pr_err("DIF protection format not supported by backend %s\n", 993 dev->transport->name); 994 return -ENOSYS; 995 } 996 if (!(dev->dev_flags & DF_CONFIGURED)) { 997 pr_err("DIF protection format requires device to be configured\n"); 998 return -ENODEV; 999 } 1000 if (dev->export_count) { 1001 pr_err("dev[%p]: Unable to format SE Device PROT type while" 1002 " export_count is %d\n", dev, dev->export_count); 1003 return -EINVAL; 1004 } 1005 1006 rc = dev->transport->format_prot(dev); 1007 if (rc) 1008 return rc; 1009 1010 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev); 1011 1012 return 0; 1013 } 1014 EXPORT_SYMBOL(se_dev_set_pi_prot_format); 1015 1016 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag) 1017 { 1018 if ((flag != 0) && (flag != 1)) { 1019 pr_err("Illegal value %d\n", flag); 1020 return -EINVAL; 1021 } 1022 dev->dev_attrib.enforce_pr_isids = flag; 1023 pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev, 1024 (dev->dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled"); 1025 return 0; 1026 } 1027 EXPORT_SYMBOL(se_dev_set_enforce_pr_isids); 1028 1029 int se_dev_set_force_pr_aptpl(struct se_device *dev, int flag) 1030 { 1031 if ((flag != 0) && (flag != 1)) { 1032 printk(KERN_ERR "Illegal value %d\n", flag); 1033 return -EINVAL; 1034 } 1035 if (dev->export_count) { 1036 pr_err("dev[%p]: Unable to set force_pr_aptpl while" 1037 " export_count is %d\n", dev, dev->export_count); 1038 return -EINVAL; 1039 } 1040 1041 dev->dev_attrib.force_pr_aptpl = flag; 1042 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", dev, flag); 1043 return 0; 1044 } 1045 EXPORT_SYMBOL(se_dev_set_force_pr_aptpl); 1046 1047 int se_dev_set_is_nonrot(struct se_device *dev, int flag) 1048 { 1049 if ((flag != 0) && (flag != 1)) { 1050 printk(KERN_ERR "Illegal value %d\n", flag); 1051 return -EINVAL; 1052 } 1053 dev->dev_attrib.is_nonrot = flag; 1054 pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n", 1055 dev, flag); 1056 return 0; 1057 } 1058 EXPORT_SYMBOL(se_dev_set_is_nonrot); 1059 1060 int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag) 1061 { 1062 if (flag != 0) { 1063 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted" 1064 " reordering not implemented\n", dev); 1065 return -ENOSYS; 1066 } 1067 dev->dev_attrib.emulate_rest_reord = flag; 1068 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag); 1069 return 0; 1070 } 1071 EXPORT_SYMBOL(se_dev_set_emulate_rest_reord); 1072 1073 /* 1074 * Note, this can only be called on unexported SE Device Object. 1075 */ 1076 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth) 1077 { 1078 if (dev->export_count) { 1079 pr_err("dev[%p]: Unable to change SE Device TCQ while" 1080 " export_count is %d\n", 1081 dev, dev->export_count); 1082 return -EINVAL; 1083 } 1084 if (!queue_depth) { 1085 pr_err("dev[%p]: Illegal ZERO value for queue" 1086 "_depth\n", dev); 1087 return -EINVAL; 1088 } 1089 1090 if (queue_depth > dev->dev_attrib.queue_depth) { 1091 if (queue_depth > dev->dev_attrib.hw_queue_depth) { 1092 pr_err("dev[%p]: Passed queue_depth:" 1093 " %u exceeds TCM/SE_Device MAX" 1094 " TCQ: %u\n", dev, queue_depth, 1095 dev->dev_attrib.hw_queue_depth); 1096 return -EINVAL; 1097 } 1098 } 1099 dev->dev_attrib.queue_depth = dev->queue_depth = queue_depth; 1100 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", 1101 dev, queue_depth); 1102 return 0; 1103 } 1104 EXPORT_SYMBOL(se_dev_set_queue_depth); 1105 1106 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors) 1107 { 1108 if (dev->export_count) { 1109 pr_err("dev[%p]: Unable to change SE Device" 1110 " optimal_sectors while export_count is %d\n", 1111 dev, dev->export_count); 1112 return -EINVAL; 1113 } 1114 if (optimal_sectors > dev->dev_attrib.hw_max_sectors) { 1115 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1116 " greater than hw_max_sectors: %u\n", dev, 1117 optimal_sectors, dev->dev_attrib.hw_max_sectors); 1118 return -EINVAL; 1119 } 1120 1121 dev->dev_attrib.optimal_sectors = optimal_sectors; 1122 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1123 dev, optimal_sectors); 1124 return 0; 1125 } 1126 EXPORT_SYMBOL(se_dev_set_optimal_sectors); 1127 1128 int se_dev_set_block_size(struct se_device *dev, u32 block_size) 1129 { 1130 if (dev->export_count) { 1131 pr_err("dev[%p]: Unable to change SE Device block_size" 1132 " while export_count is %d\n", 1133 dev, dev->export_count); 1134 return -EINVAL; 1135 } 1136 1137 if ((block_size != 512) && 1138 (block_size != 1024) && 1139 (block_size != 2048) && 1140 (block_size != 4096)) { 1141 pr_err("dev[%p]: Illegal value for block_device: %u" 1142 " for SE device, must be 512, 1024, 2048 or 4096\n", 1143 dev, block_size); 1144 return -EINVAL; 1145 } 1146 1147 dev->dev_attrib.block_size = block_size; 1148 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1149 dev, block_size); 1150 1151 if (dev->dev_attrib.max_bytes_per_io) 1152 dev->dev_attrib.hw_max_sectors = 1153 dev->dev_attrib.max_bytes_per_io / block_size; 1154 1155 return 0; 1156 } 1157 EXPORT_SYMBOL(se_dev_set_block_size); 1158 1159 struct se_lun *core_dev_add_lun( 1160 struct se_portal_group *tpg, 1161 struct se_device *dev, 1162 u32 unpacked_lun) 1163 { 1164 struct se_lun *lun; 1165 int rc; 1166 1167 lun = core_tpg_alloc_lun(tpg, unpacked_lun); 1168 if (IS_ERR(lun)) 1169 return lun; 1170 1171 rc = core_tpg_add_lun(tpg, lun, 1172 TRANSPORT_LUNFLAGS_READ_WRITE, dev); 1173 if (rc < 0) 1174 return ERR_PTR(rc); 1175 1176 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from" 1177 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1178 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, 1179 tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id); 1180 /* 1181 * Update LUN maps for dynamically added initiators when 1182 * generate_node_acl is enabled. 1183 */ 1184 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) { 1185 struct se_node_acl *acl; 1186 spin_lock_irq(&tpg->acl_node_lock); 1187 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { 1188 if (acl->dynamic_node_acl && 1189 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only || 1190 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) { 1191 spin_unlock_irq(&tpg->acl_node_lock); 1192 core_tpg_add_node_to_devs(acl, tpg); 1193 spin_lock_irq(&tpg->acl_node_lock); 1194 } 1195 } 1196 spin_unlock_irq(&tpg->acl_node_lock); 1197 } 1198 1199 return lun; 1200 } 1201 1202 /* core_dev_del_lun(): 1203 * 1204 * 1205 */ 1206 void core_dev_del_lun( 1207 struct se_portal_group *tpg, 1208 struct se_lun *lun) 1209 { 1210 pr_debug("%s_TPG[%u]_LUN[%u] - Deactivating %s Logical Unit from" 1211 " device object\n", tpg->se_tpg_tfo->get_fabric_name(), 1212 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, 1213 tpg->se_tpg_tfo->get_fabric_name()); 1214 1215 core_tpg_remove_lun(tpg, lun); 1216 } 1217 1218 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun) 1219 { 1220 struct se_lun *lun; 1221 1222 spin_lock(&tpg->tpg_lun_lock); 1223 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1224 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS" 1225 "_PER_TPG-1: %u for Target Portal Group: %hu\n", 1226 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1227 TRANSPORT_MAX_LUNS_PER_TPG-1, 1228 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1229 spin_unlock(&tpg->tpg_lun_lock); 1230 return NULL; 1231 } 1232 lun = tpg->tpg_lun_list[unpacked_lun]; 1233 1234 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) { 1235 pr_err("%s Logical Unit Number: %u is not free on" 1236 " Target Portal Group: %hu, ignoring request.\n", 1237 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1238 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1239 spin_unlock(&tpg->tpg_lun_lock); 1240 return NULL; 1241 } 1242 spin_unlock(&tpg->tpg_lun_lock); 1243 1244 return lun; 1245 } 1246 1247 /* core_dev_get_lun(): 1248 * 1249 * 1250 */ 1251 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun) 1252 { 1253 struct se_lun *lun; 1254 1255 spin_lock(&tpg->tpg_lun_lock); 1256 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1257 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER" 1258 "_TPG-1: %u for Target Portal Group: %hu\n", 1259 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1260 TRANSPORT_MAX_LUNS_PER_TPG-1, 1261 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1262 spin_unlock(&tpg->tpg_lun_lock); 1263 return NULL; 1264 } 1265 lun = tpg->tpg_lun_list[unpacked_lun]; 1266 1267 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { 1268 pr_err("%s Logical Unit Number: %u is not active on" 1269 " Target Portal Group: %hu, ignoring request.\n", 1270 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1271 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1272 spin_unlock(&tpg->tpg_lun_lock); 1273 return NULL; 1274 } 1275 spin_unlock(&tpg->tpg_lun_lock); 1276 1277 return lun; 1278 } 1279 1280 struct se_lun_acl *core_dev_init_initiator_node_lun_acl( 1281 struct se_portal_group *tpg, 1282 struct se_node_acl *nacl, 1283 u32 mapped_lun, 1284 int *ret) 1285 { 1286 struct se_lun_acl *lacl; 1287 1288 if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) { 1289 pr_err("%s InitiatorName exceeds maximum size.\n", 1290 tpg->se_tpg_tfo->get_fabric_name()); 1291 *ret = -EOVERFLOW; 1292 return NULL; 1293 } 1294 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL); 1295 if (!lacl) { 1296 pr_err("Unable to allocate memory for struct se_lun_acl.\n"); 1297 *ret = -ENOMEM; 1298 return NULL; 1299 } 1300 1301 INIT_LIST_HEAD(&lacl->lacl_list); 1302 lacl->mapped_lun = mapped_lun; 1303 lacl->se_lun_nacl = nacl; 1304 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", 1305 nacl->initiatorname); 1306 1307 return lacl; 1308 } 1309 1310 int core_dev_add_initiator_node_lun_acl( 1311 struct se_portal_group *tpg, 1312 struct se_lun_acl *lacl, 1313 u32 unpacked_lun, 1314 u32 lun_access) 1315 { 1316 struct se_lun *lun; 1317 struct se_node_acl *nacl; 1318 1319 lun = core_dev_get_lun(tpg, unpacked_lun); 1320 if (!lun) { 1321 pr_err("%s Logical Unit Number: %u is not active on" 1322 " Target Portal Group: %hu, ignoring request.\n", 1323 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1324 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1325 return -EINVAL; 1326 } 1327 1328 nacl = lacl->se_lun_nacl; 1329 if (!nacl) 1330 return -EINVAL; 1331 1332 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) && 1333 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE)) 1334 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; 1335 1336 lacl->se_lun = lun; 1337 1338 if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun, 1339 lun_access, nacl, tpg) < 0) 1340 return -EINVAL; 1341 1342 spin_lock(&lun->lun_acl_lock); 1343 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list); 1344 atomic_inc_mb(&lun->lun_acl_count); 1345 spin_unlock(&lun->lun_acl_lock); 1346 1347 pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for " 1348 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(), 1349 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun, 1350 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO", 1351 lacl->initiatorname); 1352 /* 1353 * Check to see if there are any existing persistent reservation APTPL 1354 * pre-registrations that need to be enabled for this LUN ACL.. 1355 */ 1356 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, nacl, 1357 lacl->mapped_lun); 1358 return 0; 1359 } 1360 1361 /* core_dev_del_initiator_node_lun_acl(): 1362 * 1363 * 1364 */ 1365 int core_dev_del_initiator_node_lun_acl( 1366 struct se_portal_group *tpg, 1367 struct se_lun *lun, 1368 struct se_lun_acl *lacl) 1369 { 1370 struct se_node_acl *nacl; 1371 1372 nacl = lacl->se_lun_nacl; 1373 if (!nacl) 1374 return -EINVAL; 1375 1376 spin_lock(&lun->lun_acl_lock); 1377 list_del(&lacl->lacl_list); 1378 atomic_dec_mb(&lun->lun_acl_count); 1379 spin_unlock(&lun->lun_acl_lock); 1380 1381 core_disable_device_list_for_node(lun, NULL, lacl->mapped_lun, 1382 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg); 1383 1384 lacl->se_lun = NULL; 1385 1386 pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for" 1387 " InitiatorNode: %s Mapped LUN: %u\n", 1388 tpg->se_tpg_tfo->get_fabric_name(), 1389 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, 1390 lacl->initiatorname, lacl->mapped_lun); 1391 1392 return 0; 1393 } 1394 1395 void core_dev_free_initiator_node_lun_acl( 1396 struct se_portal_group *tpg, 1397 struct se_lun_acl *lacl) 1398 { 1399 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s" 1400 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1401 tpg->se_tpg_tfo->tpg_get_tag(tpg), 1402 tpg->se_tpg_tfo->get_fabric_name(), 1403 lacl->initiatorname, lacl->mapped_lun); 1404 1405 kfree(lacl); 1406 } 1407 1408 static void scsi_dump_inquiry(struct se_device *dev) 1409 { 1410 struct t10_wwn *wwn = &dev->t10_wwn; 1411 char buf[17]; 1412 int i, device_type; 1413 /* 1414 * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer 1415 */ 1416 for (i = 0; i < 8; i++) 1417 if (wwn->vendor[i] >= 0x20) 1418 buf[i] = wwn->vendor[i]; 1419 else 1420 buf[i] = ' '; 1421 buf[i] = '\0'; 1422 pr_debug(" Vendor: %s\n", buf); 1423 1424 for (i = 0; i < 16; i++) 1425 if (wwn->model[i] >= 0x20) 1426 buf[i] = wwn->model[i]; 1427 else 1428 buf[i] = ' '; 1429 buf[i] = '\0'; 1430 pr_debug(" Model: %s\n", buf); 1431 1432 for (i = 0; i < 4; i++) 1433 if (wwn->revision[i] >= 0x20) 1434 buf[i] = wwn->revision[i]; 1435 else 1436 buf[i] = ' '; 1437 buf[i] = '\0'; 1438 pr_debug(" Revision: %s\n", buf); 1439 1440 device_type = dev->transport->get_device_type(dev); 1441 pr_debug(" Type: %s ", scsi_device_type(device_type)); 1442 } 1443 1444 struct se_device *target_alloc_device(struct se_hba *hba, const char *name) 1445 { 1446 struct se_device *dev; 1447 struct se_lun *xcopy_lun; 1448 1449 dev = hba->transport->alloc_device(hba, name); 1450 if (!dev) 1451 return NULL; 1452 1453 dev->dev_link_magic = SE_DEV_LINK_MAGIC; 1454 dev->se_hba = hba; 1455 dev->transport = hba->transport; 1456 dev->prot_length = sizeof(struct se_dif_v1_tuple); 1457 1458 INIT_LIST_HEAD(&dev->dev_list); 1459 INIT_LIST_HEAD(&dev->dev_sep_list); 1460 INIT_LIST_HEAD(&dev->dev_tmr_list); 1461 INIT_LIST_HEAD(&dev->delayed_cmd_list); 1462 INIT_LIST_HEAD(&dev->state_list); 1463 INIT_LIST_HEAD(&dev->qf_cmd_list); 1464 INIT_LIST_HEAD(&dev->g_dev_node); 1465 spin_lock_init(&dev->execute_task_lock); 1466 spin_lock_init(&dev->delayed_cmd_lock); 1467 spin_lock_init(&dev->dev_reservation_lock); 1468 spin_lock_init(&dev->se_port_lock); 1469 spin_lock_init(&dev->se_tmr_lock); 1470 spin_lock_init(&dev->qf_cmd_lock); 1471 sema_init(&dev->caw_sem, 1); 1472 atomic_set(&dev->dev_ordered_id, 0); 1473 INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list); 1474 spin_lock_init(&dev->t10_wwn.t10_vpd_lock); 1475 INIT_LIST_HEAD(&dev->t10_pr.registration_list); 1476 INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list); 1477 spin_lock_init(&dev->t10_pr.registration_lock); 1478 spin_lock_init(&dev->t10_pr.aptpl_reg_lock); 1479 INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list); 1480 spin_lock_init(&dev->t10_alua.tg_pt_gps_lock); 1481 INIT_LIST_HEAD(&dev->t10_alua.lba_map_list); 1482 spin_lock_init(&dev->t10_alua.lba_map_lock); 1483 1484 dev->t10_wwn.t10_dev = dev; 1485 dev->t10_alua.t10_dev = dev; 1486 1487 dev->dev_attrib.da_dev = dev; 1488 dev->dev_attrib.emulate_model_alias = DA_EMULATE_MODEL_ALIAS; 1489 dev->dev_attrib.emulate_dpo = DA_EMULATE_DPO; 1490 dev->dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE; 1491 dev->dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ; 1492 dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE; 1493 dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL; 1494 dev->dev_attrib.emulate_tas = DA_EMULATE_TAS; 1495 dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU; 1496 dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS; 1497 dev->dev_attrib.emulate_caw = DA_EMULATE_CAW; 1498 dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC; 1499 dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE0_PROT; 1500 dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS; 1501 dev->dev_attrib.force_pr_aptpl = DA_FORCE_PR_APTPL; 1502 dev->dev_attrib.is_nonrot = DA_IS_NONROT; 1503 dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD; 1504 dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT; 1505 dev->dev_attrib.max_unmap_block_desc_count = 1506 DA_MAX_UNMAP_BLOCK_DESC_COUNT; 1507 dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT; 1508 dev->dev_attrib.unmap_granularity_alignment = 1509 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT; 1510 dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN; 1511 1512 xcopy_lun = &dev->xcopy_lun; 1513 xcopy_lun->lun_se_dev = dev; 1514 init_completion(&xcopy_lun->lun_shutdown_comp); 1515 INIT_LIST_HEAD(&xcopy_lun->lun_acl_list); 1516 spin_lock_init(&xcopy_lun->lun_acl_lock); 1517 spin_lock_init(&xcopy_lun->lun_sep_lock); 1518 init_completion(&xcopy_lun->lun_ref_comp); 1519 1520 return dev; 1521 } 1522 1523 int target_configure_device(struct se_device *dev) 1524 { 1525 struct se_hba *hba = dev->se_hba; 1526 int ret; 1527 1528 if (dev->dev_flags & DF_CONFIGURED) { 1529 pr_err("se_dev->se_dev_ptr already set for storage" 1530 " object\n"); 1531 return -EEXIST; 1532 } 1533 1534 ret = dev->transport->configure_device(dev); 1535 if (ret) 1536 goto out; 1537 dev->dev_flags |= DF_CONFIGURED; 1538 1539 /* 1540 * XXX: there is not much point to have two different values here.. 1541 */ 1542 dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size; 1543 dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth; 1544 1545 /* 1546 * Align max_hw_sectors down to PAGE_SIZE I/O transfers 1547 */ 1548 dev->dev_attrib.hw_max_sectors = 1549 se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors, 1550 dev->dev_attrib.hw_block_size); 1551 dev->dev_attrib.optimal_sectors = dev->dev_attrib.hw_max_sectors; 1552 1553 dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX); 1554 dev->creation_time = get_jiffies_64(); 1555 1556 ret = core_setup_alua(dev); 1557 if (ret) 1558 goto out; 1559 1560 /* 1561 * Startup the struct se_device processing thread 1562 */ 1563 dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1, 1564 dev->transport->name); 1565 if (!dev->tmr_wq) { 1566 pr_err("Unable to create tmr workqueue for %s\n", 1567 dev->transport->name); 1568 ret = -ENOMEM; 1569 goto out_free_alua; 1570 } 1571 1572 /* 1573 * Setup work_queue for QUEUE_FULL 1574 */ 1575 INIT_WORK(&dev->qf_work_queue, target_qf_do_work); 1576 1577 /* 1578 * Preload the initial INQUIRY const values if we are doing 1579 * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI 1580 * passthrough because this is being provided by the backend LLD. 1581 */ 1582 if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) { 1583 strncpy(&dev->t10_wwn.vendor[0], "LIO-ORG", 8); 1584 strncpy(&dev->t10_wwn.model[0], 1585 dev->transport->inquiry_prod, 16); 1586 strncpy(&dev->t10_wwn.revision[0], 1587 dev->transport->inquiry_rev, 4); 1588 } 1589 1590 scsi_dump_inquiry(dev); 1591 1592 spin_lock(&hba->device_lock); 1593 hba->dev_count++; 1594 spin_unlock(&hba->device_lock); 1595 1596 mutex_lock(&g_device_mutex); 1597 list_add_tail(&dev->g_dev_node, &g_device_list); 1598 mutex_unlock(&g_device_mutex); 1599 1600 return 0; 1601 1602 out_free_alua: 1603 core_alua_free_lu_gp_mem(dev); 1604 out: 1605 se_release_vpd_for_dev(dev); 1606 return ret; 1607 } 1608 1609 void target_free_device(struct se_device *dev) 1610 { 1611 struct se_hba *hba = dev->se_hba; 1612 1613 WARN_ON(!list_empty(&dev->dev_sep_list)); 1614 1615 if (dev->dev_flags & DF_CONFIGURED) { 1616 destroy_workqueue(dev->tmr_wq); 1617 1618 mutex_lock(&g_device_mutex); 1619 list_del(&dev->g_dev_node); 1620 mutex_unlock(&g_device_mutex); 1621 1622 spin_lock(&hba->device_lock); 1623 hba->dev_count--; 1624 spin_unlock(&hba->device_lock); 1625 } 1626 1627 core_alua_free_lu_gp_mem(dev); 1628 core_alua_set_lba_map(dev, NULL, 0, 0); 1629 core_scsi3_free_all_registrations(dev); 1630 se_release_vpd_for_dev(dev); 1631 1632 if (dev->transport->free_prot) 1633 dev->transport->free_prot(dev); 1634 1635 dev->transport->free_device(dev); 1636 } 1637 1638 int core_dev_setup_virtual_lun0(void) 1639 { 1640 struct se_hba *hba; 1641 struct se_device *dev; 1642 char buf[] = "rd_pages=8,rd_nullio=1"; 1643 int ret; 1644 1645 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE); 1646 if (IS_ERR(hba)) 1647 return PTR_ERR(hba); 1648 1649 dev = target_alloc_device(hba, "virt_lun0"); 1650 if (!dev) { 1651 ret = -ENOMEM; 1652 goto out_free_hba; 1653 } 1654 1655 hba->transport->set_configfs_dev_params(dev, buf, sizeof(buf)); 1656 1657 ret = target_configure_device(dev); 1658 if (ret) 1659 goto out_free_se_dev; 1660 1661 lun0_hba = hba; 1662 g_lun0_dev = dev; 1663 return 0; 1664 1665 out_free_se_dev: 1666 target_free_device(dev); 1667 out_free_hba: 1668 core_delete_hba(hba); 1669 return ret; 1670 } 1671 1672 1673 void core_dev_release_virtual_lun0(void) 1674 { 1675 struct se_hba *hba = lun0_hba; 1676 1677 if (!hba) 1678 return; 1679 1680 if (g_lun0_dev) 1681 target_free_device(g_lun0_dev); 1682 core_delete_hba(hba); 1683 } 1684