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 } 662 663 int se_dev_set_max_unmap_block_desc_count( 664 struct se_device *dev, 665 u32 max_unmap_block_desc_count) 666 { 667 dev->dev_attrib.max_unmap_block_desc_count = 668 max_unmap_block_desc_count; 669 pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n", 670 dev, dev->dev_attrib.max_unmap_block_desc_count); 671 return 0; 672 } 673 674 int se_dev_set_unmap_granularity( 675 struct se_device *dev, 676 u32 unmap_granularity) 677 { 678 dev->dev_attrib.unmap_granularity = unmap_granularity; 679 pr_debug("dev[%p]: Set unmap_granularity: %u\n", 680 dev, dev->dev_attrib.unmap_granularity); 681 return 0; 682 } 683 684 int se_dev_set_unmap_granularity_alignment( 685 struct se_device *dev, 686 u32 unmap_granularity_alignment) 687 { 688 dev->dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment; 689 pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n", 690 dev, dev->dev_attrib.unmap_granularity_alignment); 691 return 0; 692 } 693 694 int se_dev_set_max_write_same_len( 695 struct se_device *dev, 696 u32 max_write_same_len) 697 { 698 dev->dev_attrib.max_write_same_len = max_write_same_len; 699 pr_debug("dev[%p]: Set max_write_same_len: %u\n", 700 dev, dev->dev_attrib.max_write_same_len); 701 return 0; 702 } 703 704 static void dev_set_t10_wwn_model_alias(struct se_device *dev) 705 { 706 const char *configname; 707 708 configname = config_item_name(&dev->dev_group.cg_item); 709 if (strlen(configname) >= 16) { 710 pr_warn("dev[%p]: Backstore name '%s' is too long for " 711 "INQUIRY_MODEL, truncating to 16 bytes\n", dev, 712 configname); 713 } 714 snprintf(&dev->t10_wwn.model[0], 16, "%s", configname); 715 } 716 717 int se_dev_set_emulate_model_alias(struct se_device *dev, int flag) 718 { 719 if (dev->export_count) { 720 pr_err("dev[%p]: Unable to change model alias" 721 " while export_count is %d\n", 722 dev, dev->export_count); 723 return -EINVAL; 724 } 725 726 if (flag != 0 && flag != 1) { 727 pr_err("Illegal value %d\n", flag); 728 return -EINVAL; 729 } 730 731 if (flag) { 732 dev_set_t10_wwn_model_alias(dev); 733 } else { 734 strncpy(&dev->t10_wwn.model[0], 735 dev->transport->inquiry_prod, 16); 736 } 737 dev->dev_attrib.emulate_model_alias = flag; 738 739 return 0; 740 } 741 742 int se_dev_set_emulate_dpo(struct se_device *dev, int flag) 743 { 744 if (flag != 0 && flag != 1) { 745 pr_err("Illegal value %d\n", flag); 746 return -EINVAL; 747 } 748 749 if (flag) { 750 pr_err("dpo_emulated not supported\n"); 751 return -EINVAL; 752 } 753 754 return 0; 755 } 756 757 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag) 758 { 759 if (flag != 0 && flag != 1) { 760 pr_err("Illegal value %d\n", flag); 761 return -EINVAL; 762 } 763 764 if (flag && 765 dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 766 pr_err("emulate_fua_write not supported for pSCSI\n"); 767 return -EINVAL; 768 } 769 dev->dev_attrib.emulate_fua_write = flag; 770 pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n", 771 dev, dev->dev_attrib.emulate_fua_write); 772 return 0; 773 } 774 775 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag) 776 { 777 if (flag != 0 && flag != 1) { 778 pr_err("Illegal value %d\n", flag); 779 return -EINVAL; 780 } 781 782 if (flag) { 783 pr_err("ua read emulated not supported\n"); 784 return -EINVAL; 785 } 786 787 return 0; 788 } 789 790 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag) 791 { 792 if (flag != 0 && flag != 1) { 793 pr_err("Illegal value %d\n", flag); 794 return -EINVAL; 795 } 796 if (flag && 797 dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 798 pr_err("emulate_write_cache not supported for pSCSI\n"); 799 return -EINVAL; 800 } 801 if (flag && 802 dev->transport->get_write_cache) { 803 pr_err("emulate_write_cache not supported for this device\n"); 804 return -EINVAL; 805 } 806 807 dev->dev_attrib.emulate_write_cache = flag; 808 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 809 dev, dev->dev_attrib.emulate_write_cache); 810 return 0; 811 } 812 813 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag) 814 { 815 if ((flag != 0) && (flag != 1) && (flag != 2)) { 816 pr_err("Illegal value %d\n", flag); 817 return -EINVAL; 818 } 819 820 if (dev->export_count) { 821 pr_err("dev[%p]: Unable to change SE Device" 822 " UA_INTRLCK_CTRL while export_count is %d\n", 823 dev, dev->export_count); 824 return -EINVAL; 825 } 826 dev->dev_attrib.emulate_ua_intlck_ctrl = flag; 827 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 828 dev, dev->dev_attrib.emulate_ua_intlck_ctrl); 829 830 return 0; 831 } 832 833 int se_dev_set_emulate_tas(struct se_device *dev, int flag) 834 { 835 if ((flag != 0) && (flag != 1)) { 836 pr_err("Illegal value %d\n", flag); 837 return -EINVAL; 838 } 839 840 if (dev->export_count) { 841 pr_err("dev[%p]: Unable to change SE Device TAS while" 842 " export_count is %d\n", 843 dev, dev->export_count); 844 return -EINVAL; 845 } 846 dev->dev_attrib.emulate_tas = flag; 847 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 848 dev, (dev->dev_attrib.emulate_tas) ? "Enabled" : "Disabled"); 849 850 return 0; 851 } 852 853 int se_dev_set_emulate_tpu(struct se_device *dev, int flag) 854 { 855 if ((flag != 0) && (flag != 1)) { 856 pr_err("Illegal value %d\n", flag); 857 return -EINVAL; 858 } 859 /* 860 * We expect this value to be non-zero when generic Block Layer 861 * Discard supported is detected iblock_create_virtdevice(). 862 */ 863 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) { 864 pr_err("Generic Block Discard not supported\n"); 865 return -ENOSYS; 866 } 867 868 dev->dev_attrib.emulate_tpu = flag; 869 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 870 dev, flag); 871 return 0; 872 } 873 874 int se_dev_set_emulate_tpws(struct se_device *dev, int flag) 875 { 876 if ((flag != 0) && (flag != 1)) { 877 pr_err("Illegal value %d\n", flag); 878 return -EINVAL; 879 } 880 /* 881 * We expect this value to be non-zero when generic Block Layer 882 * Discard supported is detected iblock_create_virtdevice(). 883 */ 884 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) { 885 pr_err("Generic Block Discard not supported\n"); 886 return -ENOSYS; 887 } 888 889 dev->dev_attrib.emulate_tpws = flag; 890 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 891 dev, flag); 892 return 0; 893 } 894 895 int se_dev_set_emulate_caw(struct se_device *dev, int flag) 896 { 897 if (flag != 0 && flag != 1) { 898 pr_err("Illegal value %d\n", flag); 899 return -EINVAL; 900 } 901 dev->dev_attrib.emulate_caw = flag; 902 pr_debug("dev[%p]: SE Device CompareAndWrite (AtomicTestandSet): %d\n", 903 dev, flag); 904 905 return 0; 906 } 907 908 int se_dev_set_emulate_3pc(struct se_device *dev, int flag) 909 { 910 if (flag != 0 && flag != 1) { 911 pr_err("Illegal value %d\n", flag); 912 return -EINVAL; 913 } 914 dev->dev_attrib.emulate_3pc = flag; 915 pr_debug("dev[%p]: SE Device 3rd Party Copy (EXTENDED_COPY): %d\n", 916 dev, flag); 917 918 return 0; 919 } 920 921 int se_dev_set_pi_prot_type(struct se_device *dev, int flag) 922 { 923 int rc, old_prot = dev->dev_attrib.pi_prot_type; 924 925 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) { 926 pr_err("Illegal value %d for pi_prot_type\n", flag); 927 return -EINVAL; 928 } 929 if (flag == 2) { 930 pr_err("DIF TYPE2 protection currently not supported\n"); 931 return -ENOSYS; 932 } 933 if (dev->dev_attrib.hw_pi_prot_type) { 934 pr_warn("DIF protection enabled on underlying hardware," 935 " ignoring\n"); 936 return 0; 937 } 938 if (!dev->transport->init_prot || !dev->transport->free_prot) { 939 /* 0 is only allowed value for non-supporting backends */ 940 if (flag == 0) 941 return 0; 942 943 pr_err("DIF protection not supported by backend: %s\n", 944 dev->transport->name); 945 return -ENOSYS; 946 } 947 if (!(dev->dev_flags & DF_CONFIGURED)) { 948 pr_err("DIF protection requires device to be configured\n"); 949 return -ENODEV; 950 } 951 if (dev->export_count) { 952 pr_err("dev[%p]: Unable to change SE Device PROT type while" 953 " export_count is %d\n", dev, dev->export_count); 954 return -EINVAL; 955 } 956 957 dev->dev_attrib.pi_prot_type = flag; 958 959 if (flag && !old_prot) { 960 rc = dev->transport->init_prot(dev); 961 if (rc) { 962 dev->dev_attrib.pi_prot_type = old_prot; 963 return rc; 964 } 965 966 } else if (!flag && old_prot) { 967 dev->transport->free_prot(dev); 968 } 969 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag); 970 971 return 0; 972 } 973 974 int se_dev_set_pi_prot_format(struct se_device *dev, int flag) 975 { 976 int rc; 977 978 if (!flag) 979 return 0; 980 981 if (flag != 1) { 982 pr_err("Illegal value %d for pi_prot_format\n", flag); 983 return -EINVAL; 984 } 985 if (!dev->transport->format_prot) { 986 pr_err("DIF protection format not supported by backend %s\n", 987 dev->transport->name); 988 return -ENOSYS; 989 } 990 if (!(dev->dev_flags & DF_CONFIGURED)) { 991 pr_err("DIF protection format requires device to be configured\n"); 992 return -ENODEV; 993 } 994 if (dev->export_count) { 995 pr_err("dev[%p]: Unable to format SE Device PROT type while" 996 " export_count is %d\n", dev, dev->export_count); 997 return -EINVAL; 998 } 999 1000 rc = dev->transport->format_prot(dev); 1001 if (rc) 1002 return rc; 1003 1004 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev); 1005 1006 return 0; 1007 } 1008 1009 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag) 1010 { 1011 if ((flag != 0) && (flag != 1)) { 1012 pr_err("Illegal value %d\n", flag); 1013 return -EINVAL; 1014 } 1015 dev->dev_attrib.enforce_pr_isids = flag; 1016 pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev, 1017 (dev->dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled"); 1018 return 0; 1019 } 1020 1021 int se_dev_set_force_pr_aptpl(struct se_device *dev, int flag) 1022 { 1023 if ((flag != 0) && (flag != 1)) { 1024 printk(KERN_ERR "Illegal value %d\n", flag); 1025 return -EINVAL; 1026 } 1027 if (dev->export_count) { 1028 pr_err("dev[%p]: Unable to set force_pr_aptpl while" 1029 " export_count is %d\n", dev, dev->export_count); 1030 return -EINVAL; 1031 } 1032 1033 dev->dev_attrib.force_pr_aptpl = flag; 1034 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", dev, flag); 1035 return 0; 1036 } 1037 1038 int se_dev_set_is_nonrot(struct se_device *dev, int flag) 1039 { 1040 if ((flag != 0) && (flag != 1)) { 1041 printk(KERN_ERR "Illegal value %d\n", flag); 1042 return -EINVAL; 1043 } 1044 dev->dev_attrib.is_nonrot = flag; 1045 pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n", 1046 dev, flag); 1047 return 0; 1048 } 1049 1050 int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag) 1051 { 1052 if (flag != 0) { 1053 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted" 1054 " reordering not implemented\n", dev); 1055 return -ENOSYS; 1056 } 1057 dev->dev_attrib.emulate_rest_reord = flag; 1058 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag); 1059 return 0; 1060 } 1061 1062 /* 1063 * Note, this can only be called on unexported SE Device Object. 1064 */ 1065 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth) 1066 { 1067 if (dev->export_count) { 1068 pr_err("dev[%p]: Unable to change SE Device TCQ while" 1069 " export_count is %d\n", 1070 dev, dev->export_count); 1071 return -EINVAL; 1072 } 1073 if (!queue_depth) { 1074 pr_err("dev[%p]: Illegal ZERO value for queue" 1075 "_depth\n", dev); 1076 return -EINVAL; 1077 } 1078 1079 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1080 if (queue_depth > dev->dev_attrib.hw_queue_depth) { 1081 pr_err("dev[%p]: Passed queue_depth: %u" 1082 " exceeds TCM/SE_Device TCQ: %u\n", 1083 dev, queue_depth, 1084 dev->dev_attrib.hw_queue_depth); 1085 return -EINVAL; 1086 } 1087 } else { 1088 if (queue_depth > dev->dev_attrib.queue_depth) { 1089 if (queue_depth > dev->dev_attrib.hw_queue_depth) { 1090 pr_err("dev[%p]: Passed queue_depth:" 1091 " %u exceeds TCM/SE_Device MAX" 1092 " TCQ: %u\n", dev, queue_depth, 1093 dev->dev_attrib.hw_queue_depth); 1094 return -EINVAL; 1095 } 1096 } 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 1105 int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors) 1106 { 1107 int block_size = dev->dev_attrib.block_size; 1108 1109 if (dev->export_count) { 1110 pr_err("dev[%p]: Unable to change SE Device" 1111 " fabric_max_sectors while export_count is %d\n", 1112 dev, dev->export_count); 1113 return -EINVAL; 1114 } 1115 if (!fabric_max_sectors) { 1116 pr_err("dev[%p]: Illegal ZERO value for" 1117 " fabric_max_sectors\n", dev); 1118 return -EINVAL; 1119 } 1120 if (fabric_max_sectors < DA_STATUS_MAX_SECTORS_MIN) { 1121 pr_err("dev[%p]: Passed fabric_max_sectors: %u less than" 1122 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, fabric_max_sectors, 1123 DA_STATUS_MAX_SECTORS_MIN); 1124 return -EINVAL; 1125 } 1126 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1127 if (fabric_max_sectors > dev->dev_attrib.hw_max_sectors) { 1128 pr_err("dev[%p]: Passed fabric_max_sectors: %u" 1129 " greater than TCM/SE_Device max_sectors:" 1130 " %u\n", dev, fabric_max_sectors, 1131 dev->dev_attrib.hw_max_sectors); 1132 return -EINVAL; 1133 } 1134 } else { 1135 if (fabric_max_sectors > DA_STATUS_MAX_SECTORS_MAX) { 1136 pr_err("dev[%p]: Passed fabric_max_sectors: %u" 1137 " greater than DA_STATUS_MAX_SECTORS_MAX:" 1138 " %u\n", dev, fabric_max_sectors, 1139 DA_STATUS_MAX_SECTORS_MAX); 1140 return -EINVAL; 1141 } 1142 } 1143 /* 1144 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks() 1145 */ 1146 if (!block_size) { 1147 block_size = 512; 1148 pr_warn("Defaulting to 512 for zero block_size\n"); 1149 } 1150 fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors, 1151 block_size); 1152 1153 dev->dev_attrib.fabric_max_sectors = fabric_max_sectors; 1154 pr_debug("dev[%p]: SE Device max_sectors changed to %u\n", 1155 dev, fabric_max_sectors); 1156 return 0; 1157 } 1158 1159 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors) 1160 { 1161 if (dev->export_count) { 1162 pr_err("dev[%p]: Unable to change SE Device" 1163 " optimal_sectors while export_count is %d\n", 1164 dev, dev->export_count); 1165 return -EINVAL; 1166 } 1167 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1168 pr_err("dev[%p]: Passed optimal_sectors cannot be" 1169 " changed for TCM/pSCSI\n", dev); 1170 return -EINVAL; 1171 } 1172 if (optimal_sectors > dev->dev_attrib.fabric_max_sectors) { 1173 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1174 " greater than fabric_max_sectors: %u\n", dev, 1175 optimal_sectors, dev->dev_attrib.fabric_max_sectors); 1176 return -EINVAL; 1177 } 1178 1179 dev->dev_attrib.optimal_sectors = optimal_sectors; 1180 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1181 dev, optimal_sectors); 1182 return 0; 1183 } 1184 1185 int se_dev_set_block_size(struct se_device *dev, u32 block_size) 1186 { 1187 if (dev->export_count) { 1188 pr_err("dev[%p]: Unable to change SE Device block_size" 1189 " while export_count is %d\n", 1190 dev, dev->export_count); 1191 return -EINVAL; 1192 } 1193 1194 if ((block_size != 512) && 1195 (block_size != 1024) && 1196 (block_size != 2048) && 1197 (block_size != 4096)) { 1198 pr_err("dev[%p]: Illegal value for block_device: %u" 1199 " for SE device, must be 512, 1024, 2048 or 4096\n", 1200 dev, block_size); 1201 return -EINVAL; 1202 } 1203 1204 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1205 pr_err("dev[%p]: Not allowed to change block_size for" 1206 " Physical Device, use for Linux/SCSI to change" 1207 " block_size for underlying hardware\n", dev); 1208 return -EINVAL; 1209 } 1210 1211 dev->dev_attrib.block_size = block_size; 1212 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1213 dev, block_size); 1214 1215 if (dev->dev_attrib.max_bytes_per_io) 1216 dev->dev_attrib.hw_max_sectors = 1217 dev->dev_attrib.max_bytes_per_io / block_size; 1218 1219 return 0; 1220 } 1221 1222 struct se_lun *core_dev_add_lun( 1223 struct se_portal_group *tpg, 1224 struct se_device *dev, 1225 u32 unpacked_lun) 1226 { 1227 struct se_lun *lun; 1228 int rc; 1229 1230 lun = core_tpg_alloc_lun(tpg, unpacked_lun); 1231 if (IS_ERR(lun)) 1232 return lun; 1233 1234 rc = core_tpg_add_lun(tpg, lun, 1235 TRANSPORT_LUNFLAGS_READ_WRITE, dev); 1236 if (rc < 0) 1237 return ERR_PTR(rc); 1238 1239 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from" 1240 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1241 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, 1242 tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id); 1243 /* 1244 * Update LUN maps for dynamically added initiators when 1245 * generate_node_acl is enabled. 1246 */ 1247 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) { 1248 struct se_node_acl *acl; 1249 spin_lock_irq(&tpg->acl_node_lock); 1250 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { 1251 if (acl->dynamic_node_acl && 1252 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only || 1253 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) { 1254 spin_unlock_irq(&tpg->acl_node_lock); 1255 core_tpg_add_node_to_devs(acl, tpg); 1256 spin_lock_irq(&tpg->acl_node_lock); 1257 } 1258 } 1259 spin_unlock_irq(&tpg->acl_node_lock); 1260 } 1261 1262 return lun; 1263 } 1264 1265 /* core_dev_del_lun(): 1266 * 1267 * 1268 */ 1269 void core_dev_del_lun( 1270 struct se_portal_group *tpg, 1271 struct se_lun *lun) 1272 { 1273 pr_debug("%s_TPG[%u]_LUN[%u] - Deactivating %s Logical Unit from" 1274 " device object\n", tpg->se_tpg_tfo->get_fabric_name(), 1275 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, 1276 tpg->se_tpg_tfo->get_fabric_name()); 1277 1278 core_tpg_remove_lun(tpg, lun); 1279 } 1280 1281 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun) 1282 { 1283 struct se_lun *lun; 1284 1285 spin_lock(&tpg->tpg_lun_lock); 1286 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1287 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS" 1288 "_PER_TPG-1: %u for Target Portal Group: %hu\n", 1289 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1290 TRANSPORT_MAX_LUNS_PER_TPG-1, 1291 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1292 spin_unlock(&tpg->tpg_lun_lock); 1293 return NULL; 1294 } 1295 lun = tpg->tpg_lun_list[unpacked_lun]; 1296 1297 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) { 1298 pr_err("%s Logical Unit Number: %u is not free on" 1299 " Target Portal Group: %hu, ignoring request.\n", 1300 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1301 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1302 spin_unlock(&tpg->tpg_lun_lock); 1303 return NULL; 1304 } 1305 spin_unlock(&tpg->tpg_lun_lock); 1306 1307 return lun; 1308 } 1309 1310 /* core_dev_get_lun(): 1311 * 1312 * 1313 */ 1314 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun) 1315 { 1316 struct se_lun *lun; 1317 1318 spin_lock(&tpg->tpg_lun_lock); 1319 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1320 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER" 1321 "_TPG-1: %u for Target Portal Group: %hu\n", 1322 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1323 TRANSPORT_MAX_LUNS_PER_TPG-1, 1324 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1325 spin_unlock(&tpg->tpg_lun_lock); 1326 return NULL; 1327 } 1328 lun = tpg->tpg_lun_list[unpacked_lun]; 1329 1330 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { 1331 pr_err("%s Logical Unit Number: %u is not active on" 1332 " Target Portal Group: %hu, ignoring request.\n", 1333 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1334 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1335 spin_unlock(&tpg->tpg_lun_lock); 1336 return NULL; 1337 } 1338 spin_unlock(&tpg->tpg_lun_lock); 1339 1340 return lun; 1341 } 1342 1343 struct se_lun_acl *core_dev_init_initiator_node_lun_acl( 1344 struct se_portal_group *tpg, 1345 struct se_node_acl *nacl, 1346 u32 mapped_lun, 1347 int *ret) 1348 { 1349 struct se_lun_acl *lacl; 1350 1351 if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) { 1352 pr_err("%s InitiatorName exceeds maximum size.\n", 1353 tpg->se_tpg_tfo->get_fabric_name()); 1354 *ret = -EOVERFLOW; 1355 return NULL; 1356 } 1357 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL); 1358 if (!lacl) { 1359 pr_err("Unable to allocate memory for struct se_lun_acl.\n"); 1360 *ret = -ENOMEM; 1361 return NULL; 1362 } 1363 1364 INIT_LIST_HEAD(&lacl->lacl_list); 1365 lacl->mapped_lun = mapped_lun; 1366 lacl->se_lun_nacl = nacl; 1367 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", 1368 nacl->initiatorname); 1369 1370 return lacl; 1371 } 1372 1373 int core_dev_add_initiator_node_lun_acl( 1374 struct se_portal_group *tpg, 1375 struct se_lun_acl *lacl, 1376 u32 unpacked_lun, 1377 u32 lun_access) 1378 { 1379 struct se_lun *lun; 1380 struct se_node_acl *nacl; 1381 1382 lun = core_dev_get_lun(tpg, unpacked_lun); 1383 if (!lun) { 1384 pr_err("%s Logical Unit Number: %u is not active on" 1385 " Target Portal Group: %hu, ignoring request.\n", 1386 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1387 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1388 return -EINVAL; 1389 } 1390 1391 nacl = lacl->se_lun_nacl; 1392 if (!nacl) 1393 return -EINVAL; 1394 1395 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) && 1396 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE)) 1397 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; 1398 1399 lacl->se_lun = lun; 1400 1401 if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun, 1402 lun_access, nacl, tpg) < 0) 1403 return -EINVAL; 1404 1405 spin_lock(&lun->lun_acl_lock); 1406 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list); 1407 atomic_inc_mb(&lun->lun_acl_count); 1408 spin_unlock(&lun->lun_acl_lock); 1409 1410 pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for " 1411 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(), 1412 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun, 1413 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO", 1414 lacl->initiatorname); 1415 /* 1416 * Check to see if there are any existing persistent reservation APTPL 1417 * pre-registrations that need to be enabled for this LUN ACL.. 1418 */ 1419 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, nacl, 1420 lacl->mapped_lun); 1421 return 0; 1422 } 1423 1424 /* core_dev_del_initiator_node_lun_acl(): 1425 * 1426 * 1427 */ 1428 int core_dev_del_initiator_node_lun_acl( 1429 struct se_portal_group *tpg, 1430 struct se_lun *lun, 1431 struct se_lun_acl *lacl) 1432 { 1433 struct se_node_acl *nacl; 1434 1435 nacl = lacl->se_lun_nacl; 1436 if (!nacl) 1437 return -EINVAL; 1438 1439 spin_lock(&lun->lun_acl_lock); 1440 list_del(&lacl->lacl_list); 1441 atomic_dec_mb(&lun->lun_acl_count); 1442 spin_unlock(&lun->lun_acl_lock); 1443 1444 core_disable_device_list_for_node(lun, NULL, lacl->mapped_lun, 1445 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg); 1446 1447 lacl->se_lun = NULL; 1448 1449 pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for" 1450 " InitiatorNode: %s Mapped LUN: %u\n", 1451 tpg->se_tpg_tfo->get_fabric_name(), 1452 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, 1453 lacl->initiatorname, lacl->mapped_lun); 1454 1455 return 0; 1456 } 1457 1458 void core_dev_free_initiator_node_lun_acl( 1459 struct se_portal_group *tpg, 1460 struct se_lun_acl *lacl) 1461 { 1462 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s" 1463 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1464 tpg->se_tpg_tfo->tpg_get_tag(tpg), 1465 tpg->se_tpg_tfo->get_fabric_name(), 1466 lacl->initiatorname, lacl->mapped_lun); 1467 1468 kfree(lacl); 1469 } 1470 1471 static void scsi_dump_inquiry(struct se_device *dev) 1472 { 1473 struct t10_wwn *wwn = &dev->t10_wwn; 1474 char buf[17]; 1475 int i, device_type; 1476 /* 1477 * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer 1478 */ 1479 for (i = 0; i < 8; i++) 1480 if (wwn->vendor[i] >= 0x20) 1481 buf[i] = wwn->vendor[i]; 1482 else 1483 buf[i] = ' '; 1484 buf[i] = '\0'; 1485 pr_debug(" Vendor: %s\n", buf); 1486 1487 for (i = 0; i < 16; i++) 1488 if (wwn->model[i] >= 0x20) 1489 buf[i] = wwn->model[i]; 1490 else 1491 buf[i] = ' '; 1492 buf[i] = '\0'; 1493 pr_debug(" Model: %s\n", buf); 1494 1495 for (i = 0; i < 4; i++) 1496 if (wwn->revision[i] >= 0x20) 1497 buf[i] = wwn->revision[i]; 1498 else 1499 buf[i] = ' '; 1500 buf[i] = '\0'; 1501 pr_debug(" Revision: %s\n", buf); 1502 1503 device_type = dev->transport->get_device_type(dev); 1504 pr_debug(" Type: %s ", scsi_device_type(device_type)); 1505 } 1506 1507 struct se_device *target_alloc_device(struct se_hba *hba, const char *name) 1508 { 1509 struct se_device *dev; 1510 struct se_lun *xcopy_lun; 1511 1512 dev = hba->transport->alloc_device(hba, name); 1513 if (!dev) 1514 return NULL; 1515 1516 dev->dev_link_magic = SE_DEV_LINK_MAGIC; 1517 dev->se_hba = hba; 1518 dev->transport = hba->transport; 1519 dev->prot_length = sizeof(struct se_dif_v1_tuple); 1520 1521 INIT_LIST_HEAD(&dev->dev_list); 1522 INIT_LIST_HEAD(&dev->dev_sep_list); 1523 INIT_LIST_HEAD(&dev->dev_tmr_list); 1524 INIT_LIST_HEAD(&dev->delayed_cmd_list); 1525 INIT_LIST_HEAD(&dev->state_list); 1526 INIT_LIST_HEAD(&dev->qf_cmd_list); 1527 INIT_LIST_HEAD(&dev->g_dev_node); 1528 spin_lock_init(&dev->execute_task_lock); 1529 spin_lock_init(&dev->delayed_cmd_lock); 1530 spin_lock_init(&dev->dev_reservation_lock); 1531 spin_lock_init(&dev->se_port_lock); 1532 spin_lock_init(&dev->se_tmr_lock); 1533 spin_lock_init(&dev->qf_cmd_lock); 1534 sema_init(&dev->caw_sem, 1); 1535 atomic_set(&dev->dev_ordered_id, 0); 1536 INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list); 1537 spin_lock_init(&dev->t10_wwn.t10_vpd_lock); 1538 INIT_LIST_HEAD(&dev->t10_pr.registration_list); 1539 INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list); 1540 spin_lock_init(&dev->t10_pr.registration_lock); 1541 spin_lock_init(&dev->t10_pr.aptpl_reg_lock); 1542 INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list); 1543 spin_lock_init(&dev->t10_alua.tg_pt_gps_lock); 1544 INIT_LIST_HEAD(&dev->t10_alua.lba_map_list); 1545 spin_lock_init(&dev->t10_alua.lba_map_lock); 1546 1547 dev->t10_wwn.t10_dev = dev; 1548 dev->t10_alua.t10_dev = dev; 1549 1550 dev->dev_attrib.da_dev = dev; 1551 dev->dev_attrib.emulate_model_alias = DA_EMULATE_MODEL_ALIAS; 1552 dev->dev_attrib.emulate_dpo = DA_EMULATE_DPO; 1553 dev->dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE; 1554 dev->dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ; 1555 dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE; 1556 dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL; 1557 dev->dev_attrib.emulate_tas = DA_EMULATE_TAS; 1558 dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU; 1559 dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS; 1560 dev->dev_attrib.emulate_caw = DA_EMULATE_CAW; 1561 dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC; 1562 dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE0_PROT; 1563 dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS; 1564 dev->dev_attrib.force_pr_aptpl = DA_FORCE_PR_APTPL; 1565 dev->dev_attrib.is_nonrot = DA_IS_NONROT; 1566 dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD; 1567 dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT; 1568 dev->dev_attrib.max_unmap_block_desc_count = 1569 DA_MAX_UNMAP_BLOCK_DESC_COUNT; 1570 dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT; 1571 dev->dev_attrib.unmap_granularity_alignment = 1572 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT; 1573 dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN; 1574 dev->dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS; 1575 dev->dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS; 1576 1577 xcopy_lun = &dev->xcopy_lun; 1578 xcopy_lun->lun_se_dev = dev; 1579 init_completion(&xcopy_lun->lun_shutdown_comp); 1580 INIT_LIST_HEAD(&xcopy_lun->lun_acl_list); 1581 spin_lock_init(&xcopy_lun->lun_acl_lock); 1582 spin_lock_init(&xcopy_lun->lun_sep_lock); 1583 init_completion(&xcopy_lun->lun_ref_comp); 1584 1585 return dev; 1586 } 1587 1588 int target_configure_device(struct se_device *dev) 1589 { 1590 struct se_hba *hba = dev->se_hba; 1591 int ret; 1592 1593 if (dev->dev_flags & DF_CONFIGURED) { 1594 pr_err("se_dev->se_dev_ptr already set for storage" 1595 " object\n"); 1596 return -EEXIST; 1597 } 1598 1599 ret = dev->transport->configure_device(dev); 1600 if (ret) 1601 goto out; 1602 dev->dev_flags |= DF_CONFIGURED; 1603 1604 /* 1605 * XXX: there is not much point to have two different values here.. 1606 */ 1607 dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size; 1608 dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth; 1609 1610 /* 1611 * Align max_hw_sectors down to PAGE_SIZE I/O transfers 1612 */ 1613 dev->dev_attrib.hw_max_sectors = 1614 se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors, 1615 dev->dev_attrib.hw_block_size); 1616 1617 dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX); 1618 dev->creation_time = get_jiffies_64(); 1619 1620 ret = core_setup_alua(dev); 1621 if (ret) 1622 goto out; 1623 1624 /* 1625 * Startup the struct se_device processing thread 1626 */ 1627 dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1, 1628 dev->transport->name); 1629 if (!dev->tmr_wq) { 1630 pr_err("Unable to create tmr workqueue for %s\n", 1631 dev->transport->name); 1632 ret = -ENOMEM; 1633 goto out_free_alua; 1634 } 1635 1636 /* 1637 * Setup work_queue for QUEUE_FULL 1638 */ 1639 INIT_WORK(&dev->qf_work_queue, target_qf_do_work); 1640 1641 /* 1642 * Preload the initial INQUIRY const values if we are doing 1643 * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI 1644 * passthrough because this is being provided by the backend LLD. 1645 */ 1646 if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) { 1647 strncpy(&dev->t10_wwn.vendor[0], "LIO-ORG", 8); 1648 strncpy(&dev->t10_wwn.model[0], 1649 dev->transport->inquiry_prod, 16); 1650 strncpy(&dev->t10_wwn.revision[0], 1651 dev->transport->inquiry_rev, 4); 1652 } 1653 1654 scsi_dump_inquiry(dev); 1655 1656 spin_lock(&hba->device_lock); 1657 hba->dev_count++; 1658 spin_unlock(&hba->device_lock); 1659 1660 mutex_lock(&g_device_mutex); 1661 list_add_tail(&dev->g_dev_node, &g_device_list); 1662 mutex_unlock(&g_device_mutex); 1663 1664 return 0; 1665 1666 out_free_alua: 1667 core_alua_free_lu_gp_mem(dev); 1668 out: 1669 se_release_vpd_for_dev(dev); 1670 return ret; 1671 } 1672 1673 void target_free_device(struct se_device *dev) 1674 { 1675 struct se_hba *hba = dev->se_hba; 1676 1677 WARN_ON(!list_empty(&dev->dev_sep_list)); 1678 1679 if (dev->dev_flags & DF_CONFIGURED) { 1680 destroy_workqueue(dev->tmr_wq); 1681 1682 mutex_lock(&g_device_mutex); 1683 list_del(&dev->g_dev_node); 1684 mutex_unlock(&g_device_mutex); 1685 1686 spin_lock(&hba->device_lock); 1687 hba->dev_count--; 1688 spin_unlock(&hba->device_lock); 1689 } 1690 1691 core_alua_free_lu_gp_mem(dev); 1692 core_alua_set_lba_map(dev, NULL, 0, 0); 1693 core_scsi3_free_all_registrations(dev); 1694 se_release_vpd_for_dev(dev); 1695 1696 if (dev->transport->free_prot) 1697 dev->transport->free_prot(dev); 1698 1699 dev->transport->free_device(dev); 1700 } 1701 1702 int core_dev_setup_virtual_lun0(void) 1703 { 1704 struct se_hba *hba; 1705 struct se_device *dev; 1706 char buf[] = "rd_pages=8,rd_nullio=1"; 1707 int ret; 1708 1709 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE); 1710 if (IS_ERR(hba)) 1711 return PTR_ERR(hba); 1712 1713 dev = target_alloc_device(hba, "virt_lun0"); 1714 if (!dev) { 1715 ret = -ENOMEM; 1716 goto out_free_hba; 1717 } 1718 1719 hba->transport->set_configfs_dev_params(dev, buf, sizeof(buf)); 1720 1721 ret = target_configure_device(dev); 1722 if (ret) 1723 goto out_free_se_dev; 1724 1725 lun0_hba = hba; 1726 g_lun0_dev = dev; 1727 return 0; 1728 1729 out_free_se_dev: 1730 target_free_device(dev); 1731 out_free_hba: 1732 core_delete_hba(hba); 1733 return ret; 1734 } 1735 1736 1737 void core_dev_release_virtual_lun0(void) 1738 { 1739 struct se_hba *hba = lun0_hba; 1740 1741 if (!hba) 1742 return; 1743 1744 if (g_lun0_dev) 1745 target_free_device(g_lun0_dev); 1746 core_delete_hba(hba); 1747 } 1748