1 /******************************************************************************* 2 * Filename: target_core_device.c (based on iscsi_target_device.c) 3 * 4 * This file contains the TCM Virtual Device and Disk Transport 5 * agnostic related functions. 6 * 7 * (c) Copyright 2003-2013 Datera, Inc. 8 * 9 * Nicholas A. Bellinger <nab@kernel.org> 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation; either version 2 of the License, or 14 * (at your option) any later version. 15 * 16 * This program is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 * GNU General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 24 * 25 ******************************************************************************/ 26 27 #include <linux/net.h> 28 #include <linux/string.h> 29 #include <linux/delay.h> 30 #include <linux/timer.h> 31 #include <linux/slab.h> 32 #include <linux/spinlock.h> 33 #include <linux/kthread.h> 34 #include <linux/in.h> 35 #include <linux/export.h> 36 #include <net/sock.h> 37 #include <net/tcp.h> 38 #include <scsi/scsi.h> 39 #include <scsi/scsi_device.h> 40 41 #include <target/target_core_base.h> 42 #include <target/target_core_backend.h> 43 #include <target/target_core_fabric.h> 44 45 #include "target_core_internal.h" 46 #include "target_core_alua.h" 47 #include "target_core_pr.h" 48 #include "target_core_ua.h" 49 50 DEFINE_MUTEX(g_device_mutex); 51 LIST_HEAD(g_device_list); 52 53 static struct se_hba *lun0_hba; 54 /* not static, needed by tpg.c */ 55 struct se_device *g_lun0_dev; 56 57 sense_reason_t 58 transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun) 59 { 60 struct se_lun *se_lun = NULL; 61 struct se_session *se_sess = se_cmd->se_sess; 62 struct se_device *dev; 63 unsigned long flags; 64 65 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) 66 return TCM_NON_EXISTENT_LUN; 67 68 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags); 69 se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun]; 70 if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 71 struct se_dev_entry *deve = se_cmd->se_deve; 72 73 deve->total_cmds++; 74 75 if ((se_cmd->data_direction == DMA_TO_DEVICE) && 76 (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) { 77 pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN" 78 " Access for 0x%08x\n", 79 se_cmd->se_tfo->get_fabric_name(), 80 unpacked_lun); 81 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); 82 return TCM_WRITE_PROTECTED; 83 } 84 85 if (se_cmd->data_direction == DMA_TO_DEVICE) 86 deve->write_bytes += se_cmd->data_length; 87 else if (se_cmd->data_direction == DMA_FROM_DEVICE) 88 deve->read_bytes += se_cmd->data_length; 89 90 se_lun = deve->se_lun; 91 se_cmd->se_lun = deve->se_lun; 92 se_cmd->pr_res_key = deve->pr_res_key; 93 se_cmd->orig_fe_lun = unpacked_lun; 94 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; 95 96 percpu_ref_get(&se_lun->lun_ref); 97 se_cmd->lun_ref_active = true; 98 } 99 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); 100 101 if (!se_lun) { 102 /* 103 * Use the se_portal_group->tpg_virt_lun0 to allow for 104 * REPORT_LUNS, et al to be returned when no active 105 * MappedLUN=0 exists for this Initiator Port. 106 */ 107 if (unpacked_lun != 0) { 108 pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" 109 " Access for 0x%08x\n", 110 se_cmd->se_tfo->get_fabric_name(), 111 unpacked_lun); 112 return TCM_NON_EXISTENT_LUN; 113 } 114 /* 115 * Force WRITE PROTECT for virtual LUN 0 116 */ 117 if ((se_cmd->data_direction != DMA_FROM_DEVICE) && 118 (se_cmd->data_direction != DMA_NONE)) 119 return TCM_WRITE_PROTECTED; 120 121 se_lun = &se_sess->se_tpg->tpg_virt_lun0; 122 se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0; 123 se_cmd->orig_fe_lun = 0; 124 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; 125 126 percpu_ref_get(&se_lun->lun_ref); 127 se_cmd->lun_ref_active = true; 128 } 129 130 /* Directly associate cmd with se_dev */ 131 se_cmd->se_dev = se_lun->lun_se_dev; 132 133 dev = se_lun->lun_se_dev; 134 atomic_long_inc(&dev->num_cmds); 135 if (se_cmd->data_direction == DMA_TO_DEVICE) 136 atomic_long_add(se_cmd->data_length, &dev->write_bytes); 137 else if (se_cmd->data_direction == DMA_FROM_DEVICE) 138 atomic_long_add(se_cmd->data_length, &dev->read_bytes); 139 140 return 0; 141 } 142 EXPORT_SYMBOL(transport_lookup_cmd_lun); 143 144 int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun) 145 { 146 struct se_dev_entry *deve; 147 struct se_lun *se_lun = NULL; 148 struct se_session *se_sess = se_cmd->se_sess; 149 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req; 150 unsigned long flags; 151 152 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) 153 return -ENODEV; 154 155 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags); 156 se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun]; 157 deve = se_cmd->se_deve; 158 159 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 160 se_tmr->tmr_lun = deve->se_lun; 161 se_cmd->se_lun = deve->se_lun; 162 se_lun = deve->se_lun; 163 se_cmd->pr_res_key = deve->pr_res_key; 164 se_cmd->orig_fe_lun = unpacked_lun; 165 } 166 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); 167 168 if (!se_lun) { 169 pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" 170 " Access for 0x%08x\n", 171 se_cmd->se_tfo->get_fabric_name(), 172 unpacked_lun); 173 return -ENODEV; 174 } 175 176 /* Directly associate cmd with se_dev */ 177 se_cmd->se_dev = se_lun->lun_se_dev; 178 se_tmr->tmr_dev = se_lun->lun_se_dev; 179 180 spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags); 181 list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list); 182 spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags); 183 184 return 0; 185 } 186 EXPORT_SYMBOL(transport_lookup_tmr_lun); 187 188 /* 189 * This function is called from core_scsi3_emulate_pro_register_and_move() 190 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count 191 * when a matching rtpi is found. 192 */ 193 struct se_dev_entry *core_get_se_deve_from_rtpi( 194 struct se_node_acl *nacl, 195 u16 rtpi) 196 { 197 struct se_dev_entry *deve; 198 struct se_lun *lun; 199 struct se_port *port; 200 struct se_portal_group *tpg = nacl->se_tpg; 201 u32 i; 202 203 spin_lock_irq(&nacl->device_list_lock); 204 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 205 deve = nacl->device_list[i]; 206 207 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 208 continue; 209 210 lun = deve->se_lun; 211 if (!lun) { 212 pr_err("%s device entries device pointer is" 213 " NULL, but Initiator has access.\n", 214 tpg->se_tpg_tfo->get_fabric_name()); 215 continue; 216 } 217 port = lun->lun_sep; 218 if (!port) { 219 pr_err("%s device entries device pointer is" 220 " NULL, but Initiator has access.\n", 221 tpg->se_tpg_tfo->get_fabric_name()); 222 continue; 223 } 224 if (port->sep_rtpi != rtpi) 225 continue; 226 227 atomic_inc(&deve->pr_ref_count); 228 smp_mb__after_atomic_inc(); 229 spin_unlock_irq(&nacl->device_list_lock); 230 231 return deve; 232 } 233 spin_unlock_irq(&nacl->device_list_lock); 234 235 return NULL; 236 } 237 238 int core_free_device_list_for_node( 239 struct se_node_acl *nacl, 240 struct se_portal_group *tpg) 241 { 242 struct se_dev_entry *deve; 243 struct se_lun *lun; 244 u32 i; 245 246 if (!nacl->device_list) 247 return 0; 248 249 spin_lock_irq(&nacl->device_list_lock); 250 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 251 deve = nacl->device_list[i]; 252 253 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 254 continue; 255 256 if (!deve->se_lun) { 257 pr_err("%s device entries device pointer is" 258 " NULL, but Initiator has access.\n", 259 tpg->se_tpg_tfo->get_fabric_name()); 260 continue; 261 } 262 lun = deve->se_lun; 263 264 spin_unlock_irq(&nacl->device_list_lock); 265 core_disable_device_list_for_node(lun, NULL, deve->mapped_lun, 266 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg); 267 spin_lock_irq(&nacl->device_list_lock); 268 } 269 spin_unlock_irq(&nacl->device_list_lock); 270 271 array_free(nacl->device_list, TRANSPORT_MAX_LUNS_PER_TPG); 272 nacl->device_list = NULL; 273 274 return 0; 275 } 276 277 void core_update_device_list_access( 278 u32 mapped_lun, 279 u32 lun_access, 280 struct se_node_acl *nacl) 281 { 282 struct se_dev_entry *deve; 283 284 spin_lock_irq(&nacl->device_list_lock); 285 deve = nacl->device_list[mapped_lun]; 286 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 287 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 288 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 289 } else { 290 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 291 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 292 } 293 spin_unlock_irq(&nacl->device_list_lock); 294 } 295 296 /* core_enable_device_list_for_node(): 297 * 298 * 299 */ 300 int core_enable_device_list_for_node( 301 struct se_lun *lun, 302 struct se_lun_acl *lun_acl, 303 u32 mapped_lun, 304 u32 lun_access, 305 struct se_node_acl *nacl, 306 struct se_portal_group *tpg) 307 { 308 struct se_port *port = lun->lun_sep; 309 struct se_dev_entry *deve; 310 311 spin_lock_irq(&nacl->device_list_lock); 312 313 deve = nacl->device_list[mapped_lun]; 314 315 /* 316 * Check if the call is handling demo mode -> explicit LUN ACL 317 * transition. This transition must be for the same struct se_lun 318 * + mapped_lun that was setup in demo mode.. 319 */ 320 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 321 if (deve->se_lun_acl != NULL) { 322 pr_err("struct se_dev_entry->se_lun_acl" 323 " already set for demo mode -> explicit" 324 " LUN ACL transition\n"); 325 spin_unlock_irq(&nacl->device_list_lock); 326 return -EINVAL; 327 } 328 if (deve->se_lun != lun) { 329 pr_err("struct se_dev_entry->se_lun does" 330 " match passed struct se_lun for demo mode" 331 " -> explicit LUN ACL transition\n"); 332 spin_unlock_irq(&nacl->device_list_lock); 333 return -EINVAL; 334 } 335 deve->se_lun_acl = lun_acl; 336 337 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 338 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 339 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 340 } else { 341 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 342 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 343 } 344 345 spin_unlock_irq(&nacl->device_list_lock); 346 return 0; 347 } 348 349 deve->se_lun = lun; 350 deve->se_lun_acl = lun_acl; 351 deve->mapped_lun = mapped_lun; 352 deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS; 353 354 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 355 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 356 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 357 } else { 358 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 359 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 360 } 361 362 deve->creation_time = get_jiffies_64(); 363 deve->attach_count++; 364 spin_unlock_irq(&nacl->device_list_lock); 365 366 spin_lock_bh(&port->sep_alua_lock); 367 list_add_tail(&deve->alua_port_list, &port->sep_alua_list); 368 spin_unlock_bh(&port->sep_alua_lock); 369 370 return 0; 371 } 372 373 /* core_disable_device_list_for_node(): 374 * 375 * 376 */ 377 int core_disable_device_list_for_node( 378 struct se_lun *lun, 379 struct se_lun_acl *lun_acl, 380 u32 mapped_lun, 381 u32 lun_access, 382 struct se_node_acl *nacl, 383 struct se_portal_group *tpg) 384 { 385 struct se_port *port = lun->lun_sep; 386 struct se_dev_entry *deve = nacl->device_list[mapped_lun]; 387 388 /* 389 * If the MappedLUN entry is being disabled, the entry in 390 * port->sep_alua_list must be removed now before clearing the 391 * struct se_dev_entry pointers below as logic in 392 * core_alua_do_transition_tg_pt() depends on these being present. 393 * 394 * deve->se_lun_acl will be NULL for demo-mode created LUNs 395 * that have not been explicitly converted to MappedLUNs -> 396 * struct se_lun_acl, but we remove deve->alua_port_list from 397 * port->sep_alua_list. This also means that active UAs and 398 * NodeACL context specific PR metadata for demo-mode 399 * MappedLUN *deve will be released below.. 400 */ 401 spin_lock_bh(&port->sep_alua_lock); 402 list_del(&deve->alua_port_list); 403 spin_unlock_bh(&port->sep_alua_lock); 404 /* 405 * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE 406 * PR operation to complete. 407 */ 408 while (atomic_read(&deve->pr_ref_count) != 0) 409 cpu_relax(); 410 411 spin_lock_irq(&nacl->device_list_lock); 412 /* 413 * Disable struct se_dev_entry LUN ACL mapping 414 */ 415 core_scsi3_ua_release_all(deve); 416 deve->se_lun = NULL; 417 deve->se_lun_acl = NULL; 418 deve->lun_flags = 0; 419 deve->creation_time = 0; 420 deve->attach_count--; 421 spin_unlock_irq(&nacl->device_list_lock); 422 423 core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl); 424 return 0; 425 } 426 427 /* core_clear_lun_from_tpg(): 428 * 429 * 430 */ 431 void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg) 432 { 433 struct se_node_acl *nacl; 434 struct se_dev_entry *deve; 435 u32 i; 436 437 spin_lock_irq(&tpg->acl_node_lock); 438 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) { 439 spin_unlock_irq(&tpg->acl_node_lock); 440 441 spin_lock_irq(&nacl->device_list_lock); 442 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 443 deve = nacl->device_list[i]; 444 if (lun != deve->se_lun) 445 continue; 446 spin_unlock_irq(&nacl->device_list_lock); 447 448 core_disable_device_list_for_node(lun, NULL, 449 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS, 450 nacl, tpg); 451 452 spin_lock_irq(&nacl->device_list_lock); 453 } 454 spin_unlock_irq(&nacl->device_list_lock); 455 456 spin_lock_irq(&tpg->acl_node_lock); 457 } 458 spin_unlock_irq(&tpg->acl_node_lock); 459 } 460 461 static struct se_port *core_alloc_port(struct se_device *dev) 462 { 463 struct se_port *port, *port_tmp; 464 465 port = kzalloc(sizeof(struct se_port), GFP_KERNEL); 466 if (!port) { 467 pr_err("Unable to allocate struct se_port\n"); 468 return ERR_PTR(-ENOMEM); 469 } 470 INIT_LIST_HEAD(&port->sep_alua_list); 471 INIT_LIST_HEAD(&port->sep_list); 472 atomic_set(&port->sep_tg_pt_secondary_offline, 0); 473 spin_lock_init(&port->sep_alua_lock); 474 mutex_init(&port->sep_tg_pt_md_mutex); 475 476 spin_lock(&dev->se_port_lock); 477 if (dev->dev_port_count == 0x0000ffff) { 478 pr_warn("Reached dev->dev_port_count ==" 479 " 0x0000ffff\n"); 480 spin_unlock(&dev->se_port_lock); 481 return ERR_PTR(-ENOSPC); 482 } 483 again: 484 /* 485 * Allocate the next RELATIVE TARGET PORT IDENTIFIER for this struct se_device 486 * Here is the table from spc4r17 section 7.7.3.8. 487 * 488 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field 489 * 490 * Code Description 491 * 0h Reserved 492 * 1h Relative port 1, historically known as port A 493 * 2h Relative port 2, historically known as port B 494 * 3h to FFFFh Relative port 3 through 65 535 495 */ 496 port->sep_rtpi = dev->dev_rpti_counter++; 497 if (!port->sep_rtpi) 498 goto again; 499 500 list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) { 501 /* 502 * Make sure RELATIVE TARGET PORT IDENTIFIER is unique 503 * for 16-bit wrap.. 504 */ 505 if (port->sep_rtpi == port_tmp->sep_rtpi) 506 goto again; 507 } 508 spin_unlock(&dev->se_port_lock); 509 510 return port; 511 } 512 513 static void core_export_port( 514 struct se_device *dev, 515 struct se_portal_group *tpg, 516 struct se_port *port, 517 struct se_lun *lun) 518 { 519 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL; 520 521 spin_lock(&dev->se_port_lock); 522 spin_lock(&lun->lun_sep_lock); 523 port->sep_tpg = tpg; 524 port->sep_lun = lun; 525 lun->lun_sep = port; 526 spin_unlock(&lun->lun_sep_lock); 527 528 list_add_tail(&port->sep_list, &dev->dev_sep_list); 529 spin_unlock(&dev->se_port_lock); 530 531 if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV && 532 !(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) { 533 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port); 534 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) { 535 pr_err("Unable to allocate t10_alua_tg_pt" 536 "_gp_member_t\n"); 537 return; 538 } 539 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 540 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem, 541 dev->t10_alua.default_tg_pt_gp); 542 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 543 pr_debug("%s/%s: Adding to default ALUA Target Port" 544 " Group: alua/default_tg_pt_gp\n", 545 dev->transport->name, tpg->se_tpg_tfo->get_fabric_name()); 546 } 547 548 dev->dev_port_count++; 549 port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFIER */ 550 } 551 552 /* 553 * Called with struct se_device->se_port_lock spinlock held. 554 */ 555 static void core_release_port(struct se_device *dev, struct se_port *port) 556 __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock) 557 { 558 /* 559 * Wait for any port reference for PR ALL_TG_PT=1 operation 560 * to complete in __core_scsi3_alloc_registration() 561 */ 562 spin_unlock(&dev->se_port_lock); 563 if (atomic_read(&port->sep_tg_pt_ref_cnt)) 564 cpu_relax(); 565 spin_lock(&dev->se_port_lock); 566 567 core_alua_free_tg_pt_gp_mem(port); 568 569 list_del(&port->sep_list); 570 dev->dev_port_count--; 571 kfree(port); 572 } 573 574 int core_dev_export( 575 struct se_device *dev, 576 struct se_portal_group *tpg, 577 struct se_lun *lun) 578 { 579 struct se_hba *hba = dev->se_hba; 580 struct se_port *port; 581 582 port = core_alloc_port(dev); 583 if (IS_ERR(port)) 584 return PTR_ERR(port); 585 586 lun->lun_se_dev = dev; 587 588 spin_lock(&hba->device_lock); 589 dev->export_count++; 590 spin_unlock(&hba->device_lock); 591 592 core_export_port(dev, tpg, port, lun); 593 return 0; 594 } 595 596 void core_dev_unexport( 597 struct se_device *dev, 598 struct se_portal_group *tpg, 599 struct se_lun *lun) 600 { 601 struct se_hba *hba = dev->se_hba; 602 struct se_port *port = lun->lun_sep; 603 604 spin_lock(&lun->lun_sep_lock); 605 if (lun->lun_se_dev == NULL) { 606 spin_unlock(&lun->lun_sep_lock); 607 return; 608 } 609 spin_unlock(&lun->lun_sep_lock); 610 611 spin_lock(&dev->se_port_lock); 612 core_release_port(dev, port); 613 spin_unlock(&dev->se_port_lock); 614 615 spin_lock(&hba->device_lock); 616 dev->export_count--; 617 spin_unlock(&hba->device_lock); 618 619 lun->lun_se_dev = NULL; 620 } 621 622 static void se_release_vpd_for_dev(struct se_device *dev) 623 { 624 struct t10_vpd *vpd, *vpd_tmp; 625 626 spin_lock(&dev->t10_wwn.t10_vpd_lock); 627 list_for_each_entry_safe(vpd, vpd_tmp, 628 &dev->t10_wwn.t10_vpd_list, vpd_list) { 629 list_del(&vpd->vpd_list); 630 kfree(vpd); 631 } 632 spin_unlock(&dev->t10_wwn.t10_vpd_lock); 633 } 634 635 static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size) 636 { 637 u32 aligned_max_sectors; 638 u32 alignment; 639 /* 640 * Limit max_sectors to a PAGE_SIZE aligned value for modern 641 * transport_allocate_data_tasks() operation. 642 */ 643 alignment = max(1ul, PAGE_SIZE / block_size); 644 aligned_max_sectors = rounddown(max_sectors, alignment); 645 646 if (max_sectors != aligned_max_sectors) 647 pr_info("Rounding down aligned max_sectors from %u to %u\n", 648 max_sectors, aligned_max_sectors); 649 650 return aligned_max_sectors; 651 } 652 653 int se_dev_set_max_unmap_lba_count( 654 struct se_device *dev, 655 u32 max_unmap_lba_count) 656 { 657 dev->dev_attrib.max_unmap_lba_count = max_unmap_lba_count; 658 pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n", 659 dev, dev->dev_attrib.max_unmap_lba_count); 660 return 0; 661 } 662 663 int se_dev_set_max_unmap_block_desc_count( 664 struct se_device *dev, 665 u32 max_unmap_block_desc_count) 666 { 667 dev->dev_attrib.max_unmap_block_desc_count = 668 max_unmap_block_desc_count; 669 pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n", 670 dev, dev->dev_attrib.max_unmap_block_desc_count); 671 return 0; 672 } 673 674 int se_dev_set_unmap_granularity( 675 struct se_device *dev, 676 u32 unmap_granularity) 677 { 678 dev->dev_attrib.unmap_granularity = unmap_granularity; 679 pr_debug("dev[%p]: Set unmap_granularity: %u\n", 680 dev, dev->dev_attrib.unmap_granularity); 681 return 0; 682 } 683 684 int se_dev_set_unmap_granularity_alignment( 685 struct se_device *dev, 686 u32 unmap_granularity_alignment) 687 { 688 dev->dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment; 689 pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n", 690 dev, dev->dev_attrib.unmap_granularity_alignment); 691 return 0; 692 } 693 694 int se_dev_set_max_write_same_len( 695 struct se_device *dev, 696 u32 max_write_same_len) 697 { 698 dev->dev_attrib.max_write_same_len = max_write_same_len; 699 pr_debug("dev[%p]: Set max_write_same_len: %u\n", 700 dev, dev->dev_attrib.max_write_same_len); 701 return 0; 702 } 703 704 static void dev_set_t10_wwn_model_alias(struct se_device *dev) 705 { 706 const char *configname; 707 708 configname = config_item_name(&dev->dev_group.cg_item); 709 if (strlen(configname) >= 16) { 710 pr_warn("dev[%p]: Backstore name '%s' is too long for " 711 "INQUIRY_MODEL, truncating to 16 bytes\n", dev, 712 configname); 713 } 714 snprintf(&dev->t10_wwn.model[0], 16, "%s", configname); 715 } 716 717 int se_dev_set_emulate_model_alias(struct se_device *dev, int flag) 718 { 719 if (dev->export_count) { 720 pr_err("dev[%p]: Unable to change model alias" 721 " while export_count is %d\n", 722 dev, dev->export_count); 723 return -EINVAL; 724 } 725 726 if (flag != 0 && flag != 1) { 727 pr_err("Illegal value %d\n", flag); 728 return -EINVAL; 729 } 730 731 if (flag) { 732 dev_set_t10_wwn_model_alias(dev); 733 } else { 734 strncpy(&dev->t10_wwn.model[0], 735 dev->transport->inquiry_prod, 16); 736 } 737 dev->dev_attrib.emulate_model_alias = flag; 738 739 return 0; 740 } 741 742 int se_dev_set_emulate_dpo(struct se_device *dev, int flag) 743 { 744 if (flag != 0 && flag != 1) { 745 pr_err("Illegal value %d\n", flag); 746 return -EINVAL; 747 } 748 749 if (flag) { 750 pr_err("dpo_emulated not supported\n"); 751 return -EINVAL; 752 } 753 754 return 0; 755 } 756 757 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag) 758 { 759 if (flag != 0 && flag != 1) { 760 pr_err("Illegal value %d\n", flag); 761 return -EINVAL; 762 } 763 764 if (flag && 765 dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 766 pr_err("emulate_fua_write not supported for pSCSI\n"); 767 return -EINVAL; 768 } 769 dev->dev_attrib.emulate_fua_write = flag; 770 pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n", 771 dev, dev->dev_attrib.emulate_fua_write); 772 return 0; 773 } 774 775 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag) 776 { 777 if (flag != 0 && flag != 1) { 778 pr_err("Illegal value %d\n", flag); 779 return -EINVAL; 780 } 781 782 if (flag) { 783 pr_err("ua read emulated not supported\n"); 784 return -EINVAL; 785 } 786 787 return 0; 788 } 789 790 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag) 791 { 792 if (flag != 0 && flag != 1) { 793 pr_err("Illegal value %d\n", flag); 794 return -EINVAL; 795 } 796 if (flag && 797 dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 798 pr_err("emulate_write_cache not supported for pSCSI\n"); 799 return -EINVAL; 800 } 801 if (dev->transport->get_write_cache) { 802 pr_warn("emulate_write_cache cannot be changed when underlying" 803 " HW reports WriteCacheEnabled, ignoring request\n"); 804 return 0; 805 } 806 807 dev->dev_attrib.emulate_write_cache = flag; 808 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 809 dev, dev->dev_attrib.emulate_write_cache); 810 return 0; 811 } 812 813 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag) 814 { 815 if ((flag != 0) && (flag != 1) && (flag != 2)) { 816 pr_err("Illegal value %d\n", flag); 817 return -EINVAL; 818 } 819 820 if (dev->export_count) { 821 pr_err("dev[%p]: Unable to change SE Device" 822 " UA_INTRLCK_CTRL while export_count is %d\n", 823 dev, dev->export_count); 824 return -EINVAL; 825 } 826 dev->dev_attrib.emulate_ua_intlck_ctrl = flag; 827 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 828 dev, dev->dev_attrib.emulate_ua_intlck_ctrl); 829 830 return 0; 831 } 832 833 int se_dev_set_emulate_tas(struct se_device *dev, int flag) 834 { 835 if ((flag != 0) && (flag != 1)) { 836 pr_err("Illegal value %d\n", flag); 837 return -EINVAL; 838 } 839 840 if (dev->export_count) { 841 pr_err("dev[%p]: Unable to change SE Device TAS while" 842 " export_count is %d\n", 843 dev, dev->export_count); 844 return -EINVAL; 845 } 846 dev->dev_attrib.emulate_tas = flag; 847 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 848 dev, (dev->dev_attrib.emulate_tas) ? "Enabled" : "Disabled"); 849 850 return 0; 851 } 852 853 int se_dev_set_emulate_tpu(struct se_device *dev, int flag) 854 { 855 if ((flag != 0) && (flag != 1)) { 856 pr_err("Illegal value %d\n", flag); 857 return -EINVAL; 858 } 859 /* 860 * We expect this value to be non-zero when generic Block Layer 861 * Discard supported is detected iblock_create_virtdevice(). 862 */ 863 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) { 864 pr_err("Generic Block Discard not supported\n"); 865 return -ENOSYS; 866 } 867 868 dev->dev_attrib.emulate_tpu = flag; 869 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 870 dev, flag); 871 return 0; 872 } 873 874 int se_dev_set_emulate_tpws(struct se_device *dev, int flag) 875 { 876 if ((flag != 0) && (flag != 1)) { 877 pr_err("Illegal value %d\n", flag); 878 return -EINVAL; 879 } 880 /* 881 * We expect this value to be non-zero when generic Block Layer 882 * Discard supported is detected iblock_create_virtdevice(). 883 */ 884 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) { 885 pr_err("Generic Block Discard not supported\n"); 886 return -ENOSYS; 887 } 888 889 dev->dev_attrib.emulate_tpws = flag; 890 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 891 dev, flag); 892 return 0; 893 } 894 895 int se_dev_set_emulate_caw(struct se_device *dev, int flag) 896 { 897 if (flag != 0 && flag != 1) { 898 pr_err("Illegal value %d\n", flag); 899 return -EINVAL; 900 } 901 dev->dev_attrib.emulate_caw = flag; 902 pr_debug("dev[%p]: SE Device CompareAndWrite (AtomicTestandSet): %d\n", 903 dev, flag); 904 905 return 0; 906 } 907 908 int se_dev_set_emulate_3pc(struct se_device *dev, int flag) 909 { 910 if (flag != 0 && flag != 1) { 911 pr_err("Illegal value %d\n", flag); 912 return -EINVAL; 913 } 914 dev->dev_attrib.emulate_3pc = flag; 915 pr_debug("dev[%p]: SE Device 3rd Party Copy (EXTENDED_COPY): %d\n", 916 dev, flag); 917 918 return 0; 919 } 920 921 int se_dev_set_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 pr_err("DIF protection not supported by backend: %s\n", 940 dev->transport->name); 941 return -ENOSYS; 942 } 943 if (!(dev->dev_flags & DF_CONFIGURED)) { 944 pr_err("DIF protection requires device to be configured\n"); 945 return -ENODEV; 946 } 947 if (dev->export_count) { 948 pr_err("dev[%p]: Unable to change SE Device PROT type while" 949 " export_count is %d\n", dev, dev->export_count); 950 return -EINVAL; 951 } 952 953 dev->dev_attrib.pi_prot_type = flag; 954 955 if (flag && !old_prot) { 956 rc = dev->transport->init_prot(dev); 957 if (rc) { 958 dev->dev_attrib.pi_prot_type = old_prot; 959 return rc; 960 } 961 962 } else if (!flag && old_prot) { 963 dev->transport->free_prot(dev); 964 } 965 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag); 966 967 return 0; 968 } 969 970 int se_dev_set_pi_prot_format(struct se_device *dev, int flag) 971 { 972 int rc; 973 974 if (!flag) 975 return 0; 976 977 if (flag != 1) { 978 pr_err("Illegal value %d for pi_prot_format\n", flag); 979 return -EINVAL; 980 } 981 if (!dev->transport->format_prot) { 982 pr_err("DIF protection format not supported by backend %s\n", 983 dev->transport->name); 984 return -ENOSYS; 985 } 986 if (!(dev->dev_flags & DF_CONFIGURED)) { 987 pr_err("DIF protection format requires device to be configured\n"); 988 return -ENODEV; 989 } 990 if (dev->export_count) { 991 pr_err("dev[%p]: Unable to format SE Device PROT type while" 992 " export_count is %d\n", dev, dev->export_count); 993 return -EINVAL; 994 } 995 996 rc = dev->transport->format_prot(dev); 997 if (rc) 998 return rc; 999 1000 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev); 1001 1002 return 0; 1003 } 1004 1005 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag) 1006 { 1007 if ((flag != 0) && (flag != 1)) { 1008 pr_err("Illegal value %d\n", flag); 1009 return -EINVAL; 1010 } 1011 dev->dev_attrib.enforce_pr_isids = flag; 1012 pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev, 1013 (dev->dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled"); 1014 return 0; 1015 } 1016 1017 int se_dev_set_is_nonrot(struct se_device *dev, int flag) 1018 { 1019 if ((flag != 0) && (flag != 1)) { 1020 printk(KERN_ERR "Illegal value %d\n", flag); 1021 return -EINVAL; 1022 } 1023 dev->dev_attrib.is_nonrot = flag; 1024 pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n", 1025 dev, flag); 1026 return 0; 1027 } 1028 1029 int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag) 1030 { 1031 if (flag != 0) { 1032 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted" 1033 " reordering not implemented\n", dev); 1034 return -ENOSYS; 1035 } 1036 dev->dev_attrib.emulate_rest_reord = flag; 1037 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag); 1038 return 0; 1039 } 1040 1041 /* 1042 * Note, this can only be called on unexported SE Device Object. 1043 */ 1044 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth) 1045 { 1046 if (dev->export_count) { 1047 pr_err("dev[%p]: Unable to change SE Device TCQ while" 1048 " export_count is %d\n", 1049 dev, dev->export_count); 1050 return -EINVAL; 1051 } 1052 if (!queue_depth) { 1053 pr_err("dev[%p]: Illegal ZERO value for queue" 1054 "_depth\n", dev); 1055 return -EINVAL; 1056 } 1057 1058 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1059 if (queue_depth > dev->dev_attrib.hw_queue_depth) { 1060 pr_err("dev[%p]: Passed queue_depth: %u" 1061 " exceeds TCM/SE_Device TCQ: %u\n", 1062 dev, queue_depth, 1063 dev->dev_attrib.hw_queue_depth); 1064 return -EINVAL; 1065 } 1066 } else { 1067 if (queue_depth > dev->dev_attrib.queue_depth) { 1068 if (queue_depth > dev->dev_attrib.hw_queue_depth) { 1069 pr_err("dev[%p]: Passed queue_depth:" 1070 " %u exceeds TCM/SE_Device MAX" 1071 " TCQ: %u\n", dev, queue_depth, 1072 dev->dev_attrib.hw_queue_depth); 1073 return -EINVAL; 1074 } 1075 } 1076 } 1077 1078 dev->dev_attrib.queue_depth = dev->queue_depth = queue_depth; 1079 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", 1080 dev, queue_depth); 1081 return 0; 1082 } 1083 1084 int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors) 1085 { 1086 int block_size = dev->dev_attrib.block_size; 1087 1088 if (dev->export_count) { 1089 pr_err("dev[%p]: Unable to change SE Device" 1090 " fabric_max_sectors while export_count is %d\n", 1091 dev, dev->export_count); 1092 return -EINVAL; 1093 } 1094 if (!fabric_max_sectors) { 1095 pr_err("dev[%p]: Illegal ZERO value for" 1096 " fabric_max_sectors\n", dev); 1097 return -EINVAL; 1098 } 1099 if (fabric_max_sectors < DA_STATUS_MAX_SECTORS_MIN) { 1100 pr_err("dev[%p]: Passed fabric_max_sectors: %u less than" 1101 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, fabric_max_sectors, 1102 DA_STATUS_MAX_SECTORS_MIN); 1103 return -EINVAL; 1104 } 1105 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1106 if (fabric_max_sectors > dev->dev_attrib.hw_max_sectors) { 1107 pr_err("dev[%p]: Passed fabric_max_sectors: %u" 1108 " greater than TCM/SE_Device max_sectors:" 1109 " %u\n", dev, fabric_max_sectors, 1110 dev->dev_attrib.hw_max_sectors); 1111 return -EINVAL; 1112 } 1113 } else { 1114 if (fabric_max_sectors > DA_STATUS_MAX_SECTORS_MAX) { 1115 pr_err("dev[%p]: Passed fabric_max_sectors: %u" 1116 " greater than DA_STATUS_MAX_SECTORS_MAX:" 1117 " %u\n", dev, fabric_max_sectors, 1118 DA_STATUS_MAX_SECTORS_MAX); 1119 return -EINVAL; 1120 } 1121 } 1122 /* 1123 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks() 1124 */ 1125 if (!block_size) { 1126 block_size = 512; 1127 pr_warn("Defaulting to 512 for zero block_size\n"); 1128 } 1129 fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors, 1130 block_size); 1131 1132 dev->dev_attrib.fabric_max_sectors = fabric_max_sectors; 1133 pr_debug("dev[%p]: SE Device max_sectors changed to %u\n", 1134 dev, fabric_max_sectors); 1135 return 0; 1136 } 1137 1138 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors) 1139 { 1140 if (dev->export_count) { 1141 pr_err("dev[%p]: Unable to change SE Device" 1142 " optimal_sectors while export_count is %d\n", 1143 dev, dev->export_count); 1144 return -EINVAL; 1145 } 1146 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1147 pr_err("dev[%p]: Passed optimal_sectors cannot be" 1148 " changed for TCM/pSCSI\n", dev); 1149 return -EINVAL; 1150 } 1151 if (optimal_sectors > dev->dev_attrib.fabric_max_sectors) { 1152 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1153 " greater than fabric_max_sectors: %u\n", dev, 1154 optimal_sectors, dev->dev_attrib.fabric_max_sectors); 1155 return -EINVAL; 1156 } 1157 1158 dev->dev_attrib.optimal_sectors = optimal_sectors; 1159 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1160 dev, optimal_sectors); 1161 return 0; 1162 } 1163 1164 int se_dev_set_block_size(struct se_device *dev, u32 block_size) 1165 { 1166 if (dev->export_count) { 1167 pr_err("dev[%p]: Unable to change SE Device block_size" 1168 " while export_count is %d\n", 1169 dev, dev->export_count); 1170 return -EINVAL; 1171 } 1172 1173 if ((block_size != 512) && 1174 (block_size != 1024) && 1175 (block_size != 2048) && 1176 (block_size != 4096)) { 1177 pr_err("dev[%p]: Illegal value for block_device: %u" 1178 " for SE device, must be 512, 1024, 2048 or 4096\n", 1179 dev, block_size); 1180 return -EINVAL; 1181 } 1182 1183 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1184 pr_err("dev[%p]: Not allowed to change block_size for" 1185 " Physical Device, use for Linux/SCSI to change" 1186 " block_size for underlying hardware\n", dev); 1187 return -EINVAL; 1188 } 1189 1190 dev->dev_attrib.block_size = block_size; 1191 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1192 dev, block_size); 1193 1194 if (dev->dev_attrib.max_bytes_per_io) 1195 dev->dev_attrib.hw_max_sectors = 1196 dev->dev_attrib.max_bytes_per_io / block_size; 1197 1198 return 0; 1199 } 1200 1201 struct se_lun *core_dev_add_lun( 1202 struct se_portal_group *tpg, 1203 struct se_device *dev, 1204 u32 unpacked_lun) 1205 { 1206 struct se_lun *lun; 1207 int rc; 1208 1209 lun = core_tpg_alloc_lun(tpg, unpacked_lun); 1210 if (IS_ERR(lun)) 1211 return lun; 1212 1213 rc = core_tpg_add_lun(tpg, lun, 1214 TRANSPORT_LUNFLAGS_READ_WRITE, dev); 1215 if (rc < 0) 1216 return ERR_PTR(rc); 1217 1218 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from" 1219 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1220 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, 1221 tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id); 1222 /* 1223 * Update LUN maps for dynamically added initiators when 1224 * generate_node_acl is enabled. 1225 */ 1226 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) { 1227 struct se_node_acl *acl; 1228 spin_lock_irq(&tpg->acl_node_lock); 1229 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { 1230 if (acl->dynamic_node_acl && 1231 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only || 1232 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) { 1233 spin_unlock_irq(&tpg->acl_node_lock); 1234 core_tpg_add_node_to_devs(acl, tpg); 1235 spin_lock_irq(&tpg->acl_node_lock); 1236 } 1237 } 1238 spin_unlock_irq(&tpg->acl_node_lock); 1239 } 1240 1241 return lun; 1242 } 1243 1244 /* core_dev_del_lun(): 1245 * 1246 * 1247 */ 1248 int core_dev_del_lun( 1249 struct se_portal_group *tpg, 1250 u32 unpacked_lun) 1251 { 1252 struct se_lun *lun; 1253 1254 lun = core_tpg_pre_dellun(tpg, unpacked_lun); 1255 if (IS_ERR(lun)) 1256 return PTR_ERR(lun); 1257 1258 core_tpg_post_dellun(tpg, lun); 1259 1260 pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from" 1261 " device object\n", tpg->se_tpg_tfo->get_fabric_name(), 1262 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, 1263 tpg->se_tpg_tfo->get_fabric_name()); 1264 1265 return 0; 1266 } 1267 1268 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun) 1269 { 1270 struct se_lun *lun; 1271 1272 spin_lock(&tpg->tpg_lun_lock); 1273 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1274 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS" 1275 "_PER_TPG-1: %u for Target Portal Group: %hu\n", 1276 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1277 TRANSPORT_MAX_LUNS_PER_TPG-1, 1278 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1279 spin_unlock(&tpg->tpg_lun_lock); 1280 return NULL; 1281 } 1282 lun = tpg->tpg_lun_list[unpacked_lun]; 1283 1284 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) { 1285 pr_err("%s Logical Unit Number: %u is not free on" 1286 " Target Portal Group: %hu, ignoring request.\n", 1287 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1288 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1289 spin_unlock(&tpg->tpg_lun_lock); 1290 return NULL; 1291 } 1292 spin_unlock(&tpg->tpg_lun_lock); 1293 1294 return lun; 1295 } 1296 1297 /* core_dev_get_lun(): 1298 * 1299 * 1300 */ 1301 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun) 1302 { 1303 struct se_lun *lun; 1304 1305 spin_lock(&tpg->tpg_lun_lock); 1306 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1307 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER" 1308 "_TPG-1: %u for Target Portal Group: %hu\n", 1309 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1310 TRANSPORT_MAX_LUNS_PER_TPG-1, 1311 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1312 spin_unlock(&tpg->tpg_lun_lock); 1313 return NULL; 1314 } 1315 lun = tpg->tpg_lun_list[unpacked_lun]; 1316 1317 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { 1318 pr_err("%s Logical Unit Number: %u is not active on" 1319 " Target Portal Group: %hu, ignoring request.\n", 1320 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1321 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1322 spin_unlock(&tpg->tpg_lun_lock); 1323 return NULL; 1324 } 1325 spin_unlock(&tpg->tpg_lun_lock); 1326 1327 return lun; 1328 } 1329 1330 struct se_lun_acl *core_dev_init_initiator_node_lun_acl( 1331 struct se_portal_group *tpg, 1332 struct se_node_acl *nacl, 1333 u32 mapped_lun, 1334 int *ret) 1335 { 1336 struct se_lun_acl *lacl; 1337 1338 if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) { 1339 pr_err("%s InitiatorName exceeds maximum size.\n", 1340 tpg->se_tpg_tfo->get_fabric_name()); 1341 *ret = -EOVERFLOW; 1342 return NULL; 1343 } 1344 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL); 1345 if (!lacl) { 1346 pr_err("Unable to allocate memory for struct se_lun_acl.\n"); 1347 *ret = -ENOMEM; 1348 return NULL; 1349 } 1350 1351 INIT_LIST_HEAD(&lacl->lacl_list); 1352 lacl->mapped_lun = mapped_lun; 1353 lacl->se_lun_nacl = nacl; 1354 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", 1355 nacl->initiatorname); 1356 1357 return lacl; 1358 } 1359 1360 int core_dev_add_initiator_node_lun_acl( 1361 struct se_portal_group *tpg, 1362 struct se_lun_acl *lacl, 1363 u32 unpacked_lun, 1364 u32 lun_access) 1365 { 1366 struct se_lun *lun; 1367 struct se_node_acl *nacl; 1368 1369 lun = core_dev_get_lun(tpg, unpacked_lun); 1370 if (!lun) { 1371 pr_err("%s Logical Unit Number: %u is not active on" 1372 " Target Portal Group: %hu, ignoring request.\n", 1373 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1374 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1375 return -EINVAL; 1376 } 1377 1378 nacl = lacl->se_lun_nacl; 1379 if (!nacl) 1380 return -EINVAL; 1381 1382 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) && 1383 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE)) 1384 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; 1385 1386 lacl->se_lun = lun; 1387 1388 if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun, 1389 lun_access, nacl, tpg) < 0) 1390 return -EINVAL; 1391 1392 spin_lock(&lun->lun_acl_lock); 1393 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list); 1394 atomic_inc(&lun->lun_acl_count); 1395 smp_mb__after_atomic_inc(); 1396 spin_unlock(&lun->lun_acl_lock); 1397 1398 pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for " 1399 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(), 1400 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun, 1401 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO", 1402 lacl->initiatorname); 1403 /* 1404 * Check to see if there are any existing persistent reservation APTPL 1405 * pre-registrations that need to be enabled for this LUN ACL.. 1406 */ 1407 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl); 1408 return 0; 1409 } 1410 1411 /* core_dev_del_initiator_node_lun_acl(): 1412 * 1413 * 1414 */ 1415 int core_dev_del_initiator_node_lun_acl( 1416 struct se_portal_group *tpg, 1417 struct se_lun *lun, 1418 struct se_lun_acl *lacl) 1419 { 1420 struct se_node_acl *nacl; 1421 1422 nacl = lacl->se_lun_nacl; 1423 if (!nacl) 1424 return -EINVAL; 1425 1426 spin_lock(&lun->lun_acl_lock); 1427 list_del(&lacl->lacl_list); 1428 atomic_dec(&lun->lun_acl_count); 1429 smp_mb__after_atomic_dec(); 1430 spin_unlock(&lun->lun_acl_lock); 1431 1432 core_disable_device_list_for_node(lun, NULL, lacl->mapped_lun, 1433 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg); 1434 1435 lacl->se_lun = NULL; 1436 1437 pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for" 1438 " InitiatorNode: %s Mapped LUN: %u\n", 1439 tpg->se_tpg_tfo->get_fabric_name(), 1440 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, 1441 lacl->initiatorname, lacl->mapped_lun); 1442 1443 return 0; 1444 } 1445 1446 void core_dev_free_initiator_node_lun_acl( 1447 struct se_portal_group *tpg, 1448 struct se_lun_acl *lacl) 1449 { 1450 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s" 1451 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1452 tpg->se_tpg_tfo->tpg_get_tag(tpg), 1453 tpg->se_tpg_tfo->get_fabric_name(), 1454 lacl->initiatorname, lacl->mapped_lun); 1455 1456 kfree(lacl); 1457 } 1458 1459 static void scsi_dump_inquiry(struct se_device *dev) 1460 { 1461 struct t10_wwn *wwn = &dev->t10_wwn; 1462 char buf[17]; 1463 int i, device_type; 1464 /* 1465 * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer 1466 */ 1467 for (i = 0; i < 8; i++) 1468 if (wwn->vendor[i] >= 0x20) 1469 buf[i] = wwn->vendor[i]; 1470 else 1471 buf[i] = ' '; 1472 buf[i] = '\0'; 1473 pr_debug(" Vendor: %s\n", buf); 1474 1475 for (i = 0; i < 16; i++) 1476 if (wwn->model[i] >= 0x20) 1477 buf[i] = wwn->model[i]; 1478 else 1479 buf[i] = ' '; 1480 buf[i] = '\0'; 1481 pr_debug(" Model: %s\n", buf); 1482 1483 for (i = 0; i < 4; i++) 1484 if (wwn->revision[i] >= 0x20) 1485 buf[i] = wwn->revision[i]; 1486 else 1487 buf[i] = ' '; 1488 buf[i] = '\0'; 1489 pr_debug(" Revision: %s\n", buf); 1490 1491 device_type = dev->transport->get_device_type(dev); 1492 pr_debug(" Type: %s ", scsi_device_type(device_type)); 1493 } 1494 1495 struct se_device *target_alloc_device(struct se_hba *hba, const char *name) 1496 { 1497 struct se_device *dev; 1498 struct se_lun *xcopy_lun; 1499 1500 dev = hba->transport->alloc_device(hba, name); 1501 if (!dev) 1502 return NULL; 1503 1504 dev->dev_link_magic = SE_DEV_LINK_MAGIC; 1505 dev->se_hba = hba; 1506 dev->transport = hba->transport; 1507 dev->prot_length = sizeof(struct se_dif_v1_tuple); 1508 1509 INIT_LIST_HEAD(&dev->dev_list); 1510 INIT_LIST_HEAD(&dev->dev_sep_list); 1511 INIT_LIST_HEAD(&dev->dev_tmr_list); 1512 INIT_LIST_HEAD(&dev->delayed_cmd_list); 1513 INIT_LIST_HEAD(&dev->state_list); 1514 INIT_LIST_HEAD(&dev->qf_cmd_list); 1515 INIT_LIST_HEAD(&dev->g_dev_node); 1516 spin_lock_init(&dev->execute_task_lock); 1517 spin_lock_init(&dev->delayed_cmd_lock); 1518 spin_lock_init(&dev->dev_reservation_lock); 1519 spin_lock_init(&dev->se_port_lock); 1520 spin_lock_init(&dev->se_tmr_lock); 1521 spin_lock_init(&dev->qf_cmd_lock); 1522 sema_init(&dev->caw_sem, 1); 1523 atomic_set(&dev->dev_ordered_id, 0); 1524 INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list); 1525 spin_lock_init(&dev->t10_wwn.t10_vpd_lock); 1526 INIT_LIST_HEAD(&dev->t10_pr.registration_list); 1527 INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list); 1528 spin_lock_init(&dev->t10_pr.registration_lock); 1529 spin_lock_init(&dev->t10_pr.aptpl_reg_lock); 1530 INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list); 1531 spin_lock_init(&dev->t10_alua.tg_pt_gps_lock); 1532 INIT_LIST_HEAD(&dev->t10_alua.lba_map_list); 1533 spin_lock_init(&dev->t10_alua.lba_map_lock); 1534 1535 dev->t10_wwn.t10_dev = dev; 1536 dev->t10_alua.t10_dev = dev; 1537 1538 dev->dev_attrib.da_dev = dev; 1539 dev->dev_attrib.emulate_model_alias = DA_EMULATE_MODEL_ALIAS; 1540 dev->dev_attrib.emulate_dpo = DA_EMULATE_DPO; 1541 dev->dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE; 1542 dev->dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ; 1543 dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE; 1544 dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL; 1545 dev->dev_attrib.emulate_tas = DA_EMULATE_TAS; 1546 dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU; 1547 dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS; 1548 dev->dev_attrib.emulate_caw = DA_EMULATE_CAW; 1549 dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC; 1550 dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE0_PROT; 1551 dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS; 1552 dev->dev_attrib.is_nonrot = DA_IS_NONROT; 1553 dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD; 1554 dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT; 1555 dev->dev_attrib.max_unmap_block_desc_count = 1556 DA_MAX_UNMAP_BLOCK_DESC_COUNT; 1557 dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT; 1558 dev->dev_attrib.unmap_granularity_alignment = 1559 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT; 1560 dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN; 1561 dev->dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS; 1562 dev->dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS; 1563 1564 xcopy_lun = &dev->xcopy_lun; 1565 xcopy_lun->lun_se_dev = dev; 1566 init_completion(&xcopy_lun->lun_shutdown_comp); 1567 INIT_LIST_HEAD(&xcopy_lun->lun_acl_list); 1568 spin_lock_init(&xcopy_lun->lun_acl_lock); 1569 spin_lock_init(&xcopy_lun->lun_sep_lock); 1570 init_completion(&xcopy_lun->lun_ref_comp); 1571 1572 return dev; 1573 } 1574 1575 int target_configure_device(struct se_device *dev) 1576 { 1577 struct se_hba *hba = dev->se_hba; 1578 int ret; 1579 1580 if (dev->dev_flags & DF_CONFIGURED) { 1581 pr_err("se_dev->se_dev_ptr already set for storage" 1582 " object\n"); 1583 return -EEXIST; 1584 } 1585 1586 ret = dev->transport->configure_device(dev); 1587 if (ret) 1588 goto out; 1589 dev->dev_flags |= DF_CONFIGURED; 1590 1591 /* 1592 * XXX: there is not much point to have two different values here.. 1593 */ 1594 dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size; 1595 dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth; 1596 1597 /* 1598 * Align max_hw_sectors down to PAGE_SIZE I/O transfers 1599 */ 1600 dev->dev_attrib.hw_max_sectors = 1601 se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors, 1602 dev->dev_attrib.hw_block_size); 1603 1604 dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX); 1605 dev->creation_time = get_jiffies_64(); 1606 1607 ret = core_setup_alua(dev); 1608 if (ret) 1609 goto out; 1610 1611 /* 1612 * Startup the struct se_device processing thread 1613 */ 1614 dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1, 1615 dev->transport->name); 1616 if (!dev->tmr_wq) { 1617 pr_err("Unable to create tmr workqueue for %s\n", 1618 dev->transport->name); 1619 ret = -ENOMEM; 1620 goto out_free_alua; 1621 } 1622 1623 /* 1624 * Setup work_queue for QUEUE_FULL 1625 */ 1626 INIT_WORK(&dev->qf_work_queue, target_qf_do_work); 1627 1628 /* 1629 * Preload the initial INQUIRY const values if we are doing 1630 * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI 1631 * passthrough because this is being provided by the backend LLD. 1632 */ 1633 if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) { 1634 strncpy(&dev->t10_wwn.vendor[0], "LIO-ORG", 8); 1635 strncpy(&dev->t10_wwn.model[0], 1636 dev->transport->inquiry_prod, 16); 1637 strncpy(&dev->t10_wwn.revision[0], 1638 dev->transport->inquiry_rev, 4); 1639 } 1640 1641 scsi_dump_inquiry(dev); 1642 1643 spin_lock(&hba->device_lock); 1644 hba->dev_count++; 1645 spin_unlock(&hba->device_lock); 1646 1647 mutex_lock(&g_device_mutex); 1648 list_add_tail(&dev->g_dev_node, &g_device_list); 1649 mutex_unlock(&g_device_mutex); 1650 1651 return 0; 1652 1653 out_free_alua: 1654 core_alua_free_lu_gp_mem(dev); 1655 out: 1656 se_release_vpd_for_dev(dev); 1657 return ret; 1658 } 1659 1660 void target_free_device(struct se_device *dev) 1661 { 1662 struct se_hba *hba = dev->se_hba; 1663 1664 WARN_ON(!list_empty(&dev->dev_sep_list)); 1665 1666 if (dev->dev_flags & DF_CONFIGURED) { 1667 destroy_workqueue(dev->tmr_wq); 1668 1669 mutex_lock(&g_device_mutex); 1670 list_del(&dev->g_dev_node); 1671 mutex_unlock(&g_device_mutex); 1672 1673 spin_lock(&hba->device_lock); 1674 hba->dev_count--; 1675 spin_unlock(&hba->device_lock); 1676 } 1677 1678 core_alua_free_lu_gp_mem(dev); 1679 core_alua_set_lba_map(dev, NULL, 0, 0); 1680 core_scsi3_free_all_registrations(dev); 1681 se_release_vpd_for_dev(dev); 1682 1683 if (dev->transport->free_prot) 1684 dev->transport->free_prot(dev); 1685 1686 dev->transport->free_device(dev); 1687 } 1688 1689 int core_dev_setup_virtual_lun0(void) 1690 { 1691 struct se_hba *hba; 1692 struct se_device *dev; 1693 char buf[] = "rd_pages=8,rd_nullio=1"; 1694 int ret; 1695 1696 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE); 1697 if (IS_ERR(hba)) 1698 return PTR_ERR(hba); 1699 1700 dev = target_alloc_device(hba, "virt_lun0"); 1701 if (!dev) { 1702 ret = -ENOMEM; 1703 goto out_free_hba; 1704 } 1705 1706 hba->transport->set_configfs_dev_params(dev, buf, sizeof(buf)); 1707 1708 ret = target_configure_device(dev); 1709 if (ret) 1710 goto out_free_se_dev; 1711 1712 lun0_hba = hba; 1713 g_lun0_dev = dev; 1714 return 0; 1715 1716 out_free_se_dev: 1717 target_free_device(dev); 1718 out_free_hba: 1719 core_delete_hba(hba); 1720 return ret; 1721 } 1722 1723 1724 void core_dev_release_virtual_lun0(void) 1725 { 1726 struct se_hba *hba = lun0_hba; 1727 1728 if (!hba) 1729 return; 1730 1731 if (g_lun0_dev) 1732 target_free_device(g_lun0_dev); 1733 core_delete_hba(hba); 1734 } 1735