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(); 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 (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_is_nonrot(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 dev->dev_attrib.is_nonrot = flag; 1028 pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n", 1029 dev, flag); 1030 return 0; 1031 } 1032 1033 int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag) 1034 { 1035 if (flag != 0) { 1036 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted" 1037 " reordering not implemented\n", dev); 1038 return -ENOSYS; 1039 } 1040 dev->dev_attrib.emulate_rest_reord = flag; 1041 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag); 1042 return 0; 1043 } 1044 1045 /* 1046 * Note, this can only be called on unexported SE Device Object. 1047 */ 1048 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth) 1049 { 1050 if (dev->export_count) { 1051 pr_err("dev[%p]: Unable to change SE Device TCQ while" 1052 " export_count is %d\n", 1053 dev, dev->export_count); 1054 return -EINVAL; 1055 } 1056 if (!queue_depth) { 1057 pr_err("dev[%p]: Illegal ZERO value for queue" 1058 "_depth\n", dev); 1059 return -EINVAL; 1060 } 1061 1062 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1063 if (queue_depth > dev->dev_attrib.hw_queue_depth) { 1064 pr_err("dev[%p]: Passed queue_depth: %u" 1065 " exceeds TCM/SE_Device TCQ: %u\n", 1066 dev, queue_depth, 1067 dev->dev_attrib.hw_queue_depth); 1068 return -EINVAL; 1069 } 1070 } else { 1071 if (queue_depth > dev->dev_attrib.queue_depth) { 1072 if (queue_depth > dev->dev_attrib.hw_queue_depth) { 1073 pr_err("dev[%p]: Passed queue_depth:" 1074 " %u exceeds TCM/SE_Device MAX" 1075 " TCQ: %u\n", dev, queue_depth, 1076 dev->dev_attrib.hw_queue_depth); 1077 return -EINVAL; 1078 } 1079 } 1080 } 1081 1082 dev->dev_attrib.queue_depth = dev->queue_depth = queue_depth; 1083 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", 1084 dev, queue_depth); 1085 return 0; 1086 } 1087 1088 int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors) 1089 { 1090 int block_size = dev->dev_attrib.block_size; 1091 1092 if (dev->export_count) { 1093 pr_err("dev[%p]: Unable to change SE Device" 1094 " fabric_max_sectors while export_count is %d\n", 1095 dev, dev->export_count); 1096 return -EINVAL; 1097 } 1098 if (!fabric_max_sectors) { 1099 pr_err("dev[%p]: Illegal ZERO value for" 1100 " fabric_max_sectors\n", dev); 1101 return -EINVAL; 1102 } 1103 if (fabric_max_sectors < DA_STATUS_MAX_SECTORS_MIN) { 1104 pr_err("dev[%p]: Passed fabric_max_sectors: %u less than" 1105 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, fabric_max_sectors, 1106 DA_STATUS_MAX_SECTORS_MIN); 1107 return -EINVAL; 1108 } 1109 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1110 if (fabric_max_sectors > dev->dev_attrib.hw_max_sectors) { 1111 pr_err("dev[%p]: Passed fabric_max_sectors: %u" 1112 " greater than TCM/SE_Device max_sectors:" 1113 " %u\n", dev, fabric_max_sectors, 1114 dev->dev_attrib.hw_max_sectors); 1115 return -EINVAL; 1116 } 1117 } else { 1118 if (fabric_max_sectors > DA_STATUS_MAX_SECTORS_MAX) { 1119 pr_err("dev[%p]: Passed fabric_max_sectors: %u" 1120 " greater than DA_STATUS_MAX_SECTORS_MAX:" 1121 " %u\n", dev, fabric_max_sectors, 1122 DA_STATUS_MAX_SECTORS_MAX); 1123 return -EINVAL; 1124 } 1125 } 1126 /* 1127 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks() 1128 */ 1129 if (!block_size) { 1130 block_size = 512; 1131 pr_warn("Defaulting to 512 for zero block_size\n"); 1132 } 1133 fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors, 1134 block_size); 1135 1136 dev->dev_attrib.fabric_max_sectors = fabric_max_sectors; 1137 pr_debug("dev[%p]: SE Device max_sectors changed to %u\n", 1138 dev, fabric_max_sectors); 1139 return 0; 1140 } 1141 1142 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors) 1143 { 1144 if (dev->export_count) { 1145 pr_err("dev[%p]: Unable to change SE Device" 1146 " optimal_sectors while export_count is %d\n", 1147 dev, dev->export_count); 1148 return -EINVAL; 1149 } 1150 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1151 pr_err("dev[%p]: Passed optimal_sectors cannot be" 1152 " changed for TCM/pSCSI\n", dev); 1153 return -EINVAL; 1154 } 1155 if (optimal_sectors > dev->dev_attrib.fabric_max_sectors) { 1156 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1157 " greater than fabric_max_sectors: %u\n", dev, 1158 optimal_sectors, dev->dev_attrib.fabric_max_sectors); 1159 return -EINVAL; 1160 } 1161 1162 dev->dev_attrib.optimal_sectors = optimal_sectors; 1163 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1164 dev, optimal_sectors); 1165 return 0; 1166 } 1167 1168 int se_dev_set_block_size(struct se_device *dev, u32 block_size) 1169 { 1170 if (dev->export_count) { 1171 pr_err("dev[%p]: Unable to change SE Device block_size" 1172 " while export_count is %d\n", 1173 dev, dev->export_count); 1174 return -EINVAL; 1175 } 1176 1177 if ((block_size != 512) && 1178 (block_size != 1024) && 1179 (block_size != 2048) && 1180 (block_size != 4096)) { 1181 pr_err("dev[%p]: Illegal value for block_device: %u" 1182 " for SE device, must be 512, 1024, 2048 or 4096\n", 1183 dev, block_size); 1184 return -EINVAL; 1185 } 1186 1187 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1188 pr_err("dev[%p]: Not allowed to change block_size for" 1189 " Physical Device, use for Linux/SCSI to change" 1190 " block_size for underlying hardware\n", dev); 1191 return -EINVAL; 1192 } 1193 1194 dev->dev_attrib.block_size = block_size; 1195 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1196 dev, block_size); 1197 1198 if (dev->dev_attrib.max_bytes_per_io) 1199 dev->dev_attrib.hw_max_sectors = 1200 dev->dev_attrib.max_bytes_per_io / block_size; 1201 1202 return 0; 1203 } 1204 1205 struct se_lun *core_dev_add_lun( 1206 struct se_portal_group *tpg, 1207 struct se_device *dev, 1208 u32 unpacked_lun) 1209 { 1210 struct se_lun *lun; 1211 int rc; 1212 1213 lun = core_tpg_alloc_lun(tpg, unpacked_lun); 1214 if (IS_ERR(lun)) 1215 return lun; 1216 1217 rc = core_tpg_add_lun(tpg, lun, 1218 TRANSPORT_LUNFLAGS_READ_WRITE, dev); 1219 if (rc < 0) 1220 return ERR_PTR(rc); 1221 1222 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from" 1223 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1224 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, 1225 tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id); 1226 /* 1227 * Update LUN maps for dynamically added initiators when 1228 * generate_node_acl is enabled. 1229 */ 1230 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) { 1231 struct se_node_acl *acl; 1232 spin_lock_irq(&tpg->acl_node_lock); 1233 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { 1234 if (acl->dynamic_node_acl && 1235 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only || 1236 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) { 1237 spin_unlock_irq(&tpg->acl_node_lock); 1238 core_tpg_add_node_to_devs(acl, tpg); 1239 spin_lock_irq(&tpg->acl_node_lock); 1240 } 1241 } 1242 spin_unlock_irq(&tpg->acl_node_lock); 1243 } 1244 1245 return lun; 1246 } 1247 1248 /* core_dev_del_lun(): 1249 * 1250 * 1251 */ 1252 int core_dev_del_lun( 1253 struct se_portal_group *tpg, 1254 u32 unpacked_lun) 1255 { 1256 struct se_lun *lun; 1257 1258 lun = core_tpg_pre_dellun(tpg, unpacked_lun); 1259 if (IS_ERR(lun)) 1260 return PTR_ERR(lun); 1261 1262 core_tpg_post_dellun(tpg, lun); 1263 1264 pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from" 1265 " device object\n", tpg->se_tpg_tfo->get_fabric_name(), 1266 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, 1267 tpg->se_tpg_tfo->get_fabric_name()); 1268 1269 return 0; 1270 } 1271 1272 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun) 1273 { 1274 struct se_lun *lun; 1275 1276 spin_lock(&tpg->tpg_lun_lock); 1277 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1278 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS" 1279 "_PER_TPG-1: %u for Target Portal Group: %hu\n", 1280 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1281 TRANSPORT_MAX_LUNS_PER_TPG-1, 1282 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1283 spin_unlock(&tpg->tpg_lun_lock); 1284 return NULL; 1285 } 1286 lun = tpg->tpg_lun_list[unpacked_lun]; 1287 1288 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) { 1289 pr_err("%s Logical Unit Number: %u is not free on" 1290 " Target Portal Group: %hu, ignoring request.\n", 1291 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1292 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1293 spin_unlock(&tpg->tpg_lun_lock); 1294 return NULL; 1295 } 1296 spin_unlock(&tpg->tpg_lun_lock); 1297 1298 return lun; 1299 } 1300 1301 /* core_dev_get_lun(): 1302 * 1303 * 1304 */ 1305 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun) 1306 { 1307 struct se_lun *lun; 1308 1309 spin_lock(&tpg->tpg_lun_lock); 1310 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1311 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER" 1312 "_TPG-1: %u for Target Portal Group: %hu\n", 1313 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1314 TRANSPORT_MAX_LUNS_PER_TPG-1, 1315 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1316 spin_unlock(&tpg->tpg_lun_lock); 1317 return NULL; 1318 } 1319 lun = tpg->tpg_lun_list[unpacked_lun]; 1320 1321 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { 1322 pr_err("%s Logical Unit Number: %u is not active on" 1323 " Target Portal Group: %hu, ignoring request.\n", 1324 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1325 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1326 spin_unlock(&tpg->tpg_lun_lock); 1327 return NULL; 1328 } 1329 spin_unlock(&tpg->tpg_lun_lock); 1330 1331 return lun; 1332 } 1333 1334 struct se_lun_acl *core_dev_init_initiator_node_lun_acl( 1335 struct se_portal_group *tpg, 1336 struct se_node_acl *nacl, 1337 u32 mapped_lun, 1338 int *ret) 1339 { 1340 struct se_lun_acl *lacl; 1341 1342 if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) { 1343 pr_err("%s InitiatorName exceeds maximum size.\n", 1344 tpg->se_tpg_tfo->get_fabric_name()); 1345 *ret = -EOVERFLOW; 1346 return NULL; 1347 } 1348 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL); 1349 if (!lacl) { 1350 pr_err("Unable to allocate memory for struct se_lun_acl.\n"); 1351 *ret = -ENOMEM; 1352 return NULL; 1353 } 1354 1355 INIT_LIST_HEAD(&lacl->lacl_list); 1356 lacl->mapped_lun = mapped_lun; 1357 lacl->se_lun_nacl = nacl; 1358 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", 1359 nacl->initiatorname); 1360 1361 return lacl; 1362 } 1363 1364 int core_dev_add_initiator_node_lun_acl( 1365 struct se_portal_group *tpg, 1366 struct se_lun_acl *lacl, 1367 u32 unpacked_lun, 1368 u32 lun_access) 1369 { 1370 struct se_lun *lun; 1371 struct se_node_acl *nacl; 1372 1373 lun = core_dev_get_lun(tpg, unpacked_lun); 1374 if (!lun) { 1375 pr_err("%s Logical Unit Number: %u is not active on" 1376 " Target Portal Group: %hu, ignoring request.\n", 1377 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1378 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1379 return -EINVAL; 1380 } 1381 1382 nacl = lacl->se_lun_nacl; 1383 if (!nacl) 1384 return -EINVAL; 1385 1386 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) && 1387 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE)) 1388 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; 1389 1390 lacl->se_lun = lun; 1391 1392 if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun, 1393 lun_access, nacl, tpg) < 0) 1394 return -EINVAL; 1395 1396 spin_lock(&lun->lun_acl_lock); 1397 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list); 1398 atomic_inc(&lun->lun_acl_count); 1399 smp_mb__after_atomic(); 1400 spin_unlock(&lun->lun_acl_lock); 1401 1402 pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for " 1403 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(), 1404 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun, 1405 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO", 1406 lacl->initiatorname); 1407 /* 1408 * Check to see if there are any existing persistent reservation APTPL 1409 * pre-registrations that need to be enabled for this LUN ACL.. 1410 */ 1411 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl); 1412 return 0; 1413 } 1414 1415 /* core_dev_del_initiator_node_lun_acl(): 1416 * 1417 * 1418 */ 1419 int core_dev_del_initiator_node_lun_acl( 1420 struct se_portal_group *tpg, 1421 struct se_lun *lun, 1422 struct se_lun_acl *lacl) 1423 { 1424 struct se_node_acl *nacl; 1425 1426 nacl = lacl->se_lun_nacl; 1427 if (!nacl) 1428 return -EINVAL; 1429 1430 spin_lock(&lun->lun_acl_lock); 1431 list_del(&lacl->lacl_list); 1432 atomic_dec(&lun->lun_acl_count); 1433 smp_mb__after_atomic(); 1434 spin_unlock(&lun->lun_acl_lock); 1435 1436 core_disable_device_list_for_node(lun, NULL, lacl->mapped_lun, 1437 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg); 1438 1439 lacl->se_lun = NULL; 1440 1441 pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for" 1442 " InitiatorNode: %s Mapped LUN: %u\n", 1443 tpg->se_tpg_tfo->get_fabric_name(), 1444 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, 1445 lacl->initiatorname, lacl->mapped_lun); 1446 1447 return 0; 1448 } 1449 1450 void core_dev_free_initiator_node_lun_acl( 1451 struct se_portal_group *tpg, 1452 struct se_lun_acl *lacl) 1453 { 1454 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s" 1455 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1456 tpg->se_tpg_tfo->tpg_get_tag(tpg), 1457 tpg->se_tpg_tfo->get_fabric_name(), 1458 lacl->initiatorname, lacl->mapped_lun); 1459 1460 kfree(lacl); 1461 } 1462 1463 static void scsi_dump_inquiry(struct se_device *dev) 1464 { 1465 struct t10_wwn *wwn = &dev->t10_wwn; 1466 char buf[17]; 1467 int i, device_type; 1468 /* 1469 * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer 1470 */ 1471 for (i = 0; i < 8; i++) 1472 if (wwn->vendor[i] >= 0x20) 1473 buf[i] = wwn->vendor[i]; 1474 else 1475 buf[i] = ' '; 1476 buf[i] = '\0'; 1477 pr_debug(" Vendor: %s\n", buf); 1478 1479 for (i = 0; i < 16; i++) 1480 if (wwn->model[i] >= 0x20) 1481 buf[i] = wwn->model[i]; 1482 else 1483 buf[i] = ' '; 1484 buf[i] = '\0'; 1485 pr_debug(" Model: %s\n", buf); 1486 1487 for (i = 0; i < 4; i++) 1488 if (wwn->revision[i] >= 0x20) 1489 buf[i] = wwn->revision[i]; 1490 else 1491 buf[i] = ' '; 1492 buf[i] = '\0'; 1493 pr_debug(" Revision: %s\n", buf); 1494 1495 device_type = dev->transport->get_device_type(dev); 1496 pr_debug(" Type: %s ", scsi_device_type(device_type)); 1497 } 1498 1499 struct se_device *target_alloc_device(struct se_hba *hba, const char *name) 1500 { 1501 struct se_device *dev; 1502 struct se_lun *xcopy_lun; 1503 1504 dev = hba->transport->alloc_device(hba, name); 1505 if (!dev) 1506 return NULL; 1507 1508 dev->dev_link_magic = SE_DEV_LINK_MAGIC; 1509 dev->se_hba = hba; 1510 dev->transport = hba->transport; 1511 dev->prot_length = sizeof(struct se_dif_v1_tuple); 1512 1513 INIT_LIST_HEAD(&dev->dev_list); 1514 INIT_LIST_HEAD(&dev->dev_sep_list); 1515 INIT_LIST_HEAD(&dev->dev_tmr_list); 1516 INIT_LIST_HEAD(&dev->delayed_cmd_list); 1517 INIT_LIST_HEAD(&dev->state_list); 1518 INIT_LIST_HEAD(&dev->qf_cmd_list); 1519 INIT_LIST_HEAD(&dev->g_dev_node); 1520 spin_lock_init(&dev->execute_task_lock); 1521 spin_lock_init(&dev->delayed_cmd_lock); 1522 spin_lock_init(&dev->dev_reservation_lock); 1523 spin_lock_init(&dev->se_port_lock); 1524 spin_lock_init(&dev->se_tmr_lock); 1525 spin_lock_init(&dev->qf_cmd_lock); 1526 sema_init(&dev->caw_sem, 1); 1527 atomic_set(&dev->dev_ordered_id, 0); 1528 INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list); 1529 spin_lock_init(&dev->t10_wwn.t10_vpd_lock); 1530 INIT_LIST_HEAD(&dev->t10_pr.registration_list); 1531 INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list); 1532 spin_lock_init(&dev->t10_pr.registration_lock); 1533 spin_lock_init(&dev->t10_pr.aptpl_reg_lock); 1534 INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list); 1535 spin_lock_init(&dev->t10_alua.tg_pt_gps_lock); 1536 INIT_LIST_HEAD(&dev->t10_alua.lba_map_list); 1537 spin_lock_init(&dev->t10_alua.lba_map_lock); 1538 1539 dev->t10_wwn.t10_dev = dev; 1540 dev->t10_alua.t10_dev = dev; 1541 1542 dev->dev_attrib.da_dev = dev; 1543 dev->dev_attrib.emulate_model_alias = DA_EMULATE_MODEL_ALIAS; 1544 dev->dev_attrib.emulate_dpo = DA_EMULATE_DPO; 1545 dev->dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE; 1546 dev->dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ; 1547 dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE; 1548 dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL; 1549 dev->dev_attrib.emulate_tas = DA_EMULATE_TAS; 1550 dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU; 1551 dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS; 1552 dev->dev_attrib.emulate_caw = DA_EMULATE_CAW; 1553 dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC; 1554 dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE0_PROT; 1555 dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS; 1556 dev->dev_attrib.is_nonrot = DA_IS_NONROT; 1557 dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD; 1558 dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT; 1559 dev->dev_attrib.max_unmap_block_desc_count = 1560 DA_MAX_UNMAP_BLOCK_DESC_COUNT; 1561 dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT; 1562 dev->dev_attrib.unmap_granularity_alignment = 1563 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT; 1564 dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN; 1565 dev->dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS; 1566 dev->dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS; 1567 1568 xcopy_lun = &dev->xcopy_lun; 1569 xcopy_lun->lun_se_dev = dev; 1570 init_completion(&xcopy_lun->lun_shutdown_comp); 1571 INIT_LIST_HEAD(&xcopy_lun->lun_acl_list); 1572 spin_lock_init(&xcopy_lun->lun_acl_lock); 1573 spin_lock_init(&xcopy_lun->lun_sep_lock); 1574 init_completion(&xcopy_lun->lun_ref_comp); 1575 1576 return dev; 1577 } 1578 1579 int target_configure_device(struct se_device *dev) 1580 { 1581 struct se_hba *hba = dev->se_hba; 1582 int ret; 1583 1584 if (dev->dev_flags & DF_CONFIGURED) { 1585 pr_err("se_dev->se_dev_ptr already set for storage" 1586 " object\n"); 1587 return -EEXIST; 1588 } 1589 1590 ret = dev->transport->configure_device(dev); 1591 if (ret) 1592 goto out; 1593 dev->dev_flags |= DF_CONFIGURED; 1594 1595 /* 1596 * XXX: there is not much point to have two different values here.. 1597 */ 1598 dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size; 1599 dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth; 1600 1601 /* 1602 * Align max_hw_sectors down to PAGE_SIZE I/O transfers 1603 */ 1604 dev->dev_attrib.hw_max_sectors = 1605 se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors, 1606 dev->dev_attrib.hw_block_size); 1607 1608 dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX); 1609 dev->creation_time = get_jiffies_64(); 1610 1611 ret = core_setup_alua(dev); 1612 if (ret) 1613 goto out; 1614 1615 /* 1616 * Startup the struct se_device processing thread 1617 */ 1618 dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1, 1619 dev->transport->name); 1620 if (!dev->tmr_wq) { 1621 pr_err("Unable to create tmr workqueue for %s\n", 1622 dev->transport->name); 1623 ret = -ENOMEM; 1624 goto out_free_alua; 1625 } 1626 1627 /* 1628 * Setup work_queue for QUEUE_FULL 1629 */ 1630 INIT_WORK(&dev->qf_work_queue, target_qf_do_work); 1631 1632 /* 1633 * Preload the initial INQUIRY const values if we are doing 1634 * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI 1635 * passthrough because this is being provided by the backend LLD. 1636 */ 1637 if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) { 1638 strncpy(&dev->t10_wwn.vendor[0], "LIO-ORG", 8); 1639 strncpy(&dev->t10_wwn.model[0], 1640 dev->transport->inquiry_prod, 16); 1641 strncpy(&dev->t10_wwn.revision[0], 1642 dev->transport->inquiry_rev, 4); 1643 } 1644 1645 scsi_dump_inquiry(dev); 1646 1647 spin_lock(&hba->device_lock); 1648 hba->dev_count++; 1649 spin_unlock(&hba->device_lock); 1650 1651 mutex_lock(&g_device_mutex); 1652 list_add_tail(&dev->g_dev_node, &g_device_list); 1653 mutex_unlock(&g_device_mutex); 1654 1655 return 0; 1656 1657 out_free_alua: 1658 core_alua_free_lu_gp_mem(dev); 1659 out: 1660 se_release_vpd_for_dev(dev); 1661 return ret; 1662 } 1663 1664 void target_free_device(struct se_device *dev) 1665 { 1666 struct se_hba *hba = dev->se_hba; 1667 1668 WARN_ON(!list_empty(&dev->dev_sep_list)); 1669 1670 if (dev->dev_flags & DF_CONFIGURED) { 1671 destroy_workqueue(dev->tmr_wq); 1672 1673 mutex_lock(&g_device_mutex); 1674 list_del(&dev->g_dev_node); 1675 mutex_unlock(&g_device_mutex); 1676 1677 spin_lock(&hba->device_lock); 1678 hba->dev_count--; 1679 spin_unlock(&hba->device_lock); 1680 } 1681 1682 core_alua_free_lu_gp_mem(dev); 1683 core_alua_set_lba_map(dev, NULL, 0, 0); 1684 core_scsi3_free_all_registrations(dev); 1685 se_release_vpd_for_dev(dev); 1686 1687 if (dev->transport->free_prot) 1688 dev->transport->free_prot(dev); 1689 1690 dev->transport->free_device(dev); 1691 } 1692 1693 int core_dev_setup_virtual_lun0(void) 1694 { 1695 struct se_hba *hba; 1696 struct se_device *dev; 1697 char buf[] = "rd_pages=8,rd_nullio=1"; 1698 int ret; 1699 1700 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE); 1701 if (IS_ERR(hba)) 1702 return PTR_ERR(hba); 1703 1704 dev = target_alloc_device(hba, "virt_lun0"); 1705 if (!dev) { 1706 ret = -ENOMEM; 1707 goto out_free_hba; 1708 } 1709 1710 hba->transport->set_configfs_dev_params(dev, buf, sizeof(buf)); 1711 1712 ret = target_configure_device(dev); 1713 if (ret) 1714 goto out_free_se_dev; 1715 1716 lun0_hba = hba; 1717 g_lun0_dev = dev; 1718 return 0; 1719 1720 out_free_se_dev: 1721 target_free_device(dev); 1722 out_free_hba: 1723 core_delete_hba(hba); 1724 return ret; 1725 } 1726 1727 1728 void core_dev_release_virtual_lun0(void) 1729 { 1730 struct se_hba *hba = lun0_hba; 1731 1732 if (!hba) 1733 return; 1734 1735 if (g_lun0_dev) 1736 target_free_device(g_lun0_dev); 1737 core_delete_hba(hba); 1738 } 1739