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_sep = NULL; 620 lun->lun_se_dev = NULL; 621 } 622 623 static void se_release_vpd_for_dev(struct se_device *dev) 624 { 625 struct t10_vpd *vpd, *vpd_tmp; 626 627 spin_lock(&dev->t10_wwn.t10_vpd_lock); 628 list_for_each_entry_safe(vpd, vpd_tmp, 629 &dev->t10_wwn.t10_vpd_list, vpd_list) { 630 list_del(&vpd->vpd_list); 631 kfree(vpd); 632 } 633 spin_unlock(&dev->t10_wwn.t10_vpd_lock); 634 } 635 636 static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size) 637 { 638 u32 aligned_max_sectors; 639 u32 alignment; 640 /* 641 * Limit max_sectors to a PAGE_SIZE aligned value for modern 642 * transport_allocate_data_tasks() operation. 643 */ 644 alignment = max(1ul, PAGE_SIZE / block_size); 645 aligned_max_sectors = rounddown(max_sectors, alignment); 646 647 if (max_sectors != aligned_max_sectors) 648 pr_info("Rounding down aligned max_sectors from %u to %u\n", 649 max_sectors, aligned_max_sectors); 650 651 return aligned_max_sectors; 652 } 653 654 int se_dev_set_max_unmap_lba_count( 655 struct se_device *dev, 656 u32 max_unmap_lba_count) 657 { 658 dev->dev_attrib.max_unmap_lba_count = max_unmap_lba_count; 659 pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n", 660 dev, dev->dev_attrib.max_unmap_lba_count); 661 return 0; 662 } 663 664 int se_dev_set_max_unmap_block_desc_count( 665 struct se_device *dev, 666 u32 max_unmap_block_desc_count) 667 { 668 dev->dev_attrib.max_unmap_block_desc_count = 669 max_unmap_block_desc_count; 670 pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n", 671 dev, dev->dev_attrib.max_unmap_block_desc_count); 672 return 0; 673 } 674 675 int se_dev_set_unmap_granularity( 676 struct se_device *dev, 677 u32 unmap_granularity) 678 { 679 dev->dev_attrib.unmap_granularity = unmap_granularity; 680 pr_debug("dev[%p]: Set unmap_granularity: %u\n", 681 dev, dev->dev_attrib.unmap_granularity); 682 return 0; 683 } 684 685 int se_dev_set_unmap_granularity_alignment( 686 struct se_device *dev, 687 u32 unmap_granularity_alignment) 688 { 689 dev->dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment; 690 pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n", 691 dev, dev->dev_attrib.unmap_granularity_alignment); 692 return 0; 693 } 694 695 int se_dev_set_max_write_same_len( 696 struct se_device *dev, 697 u32 max_write_same_len) 698 { 699 dev->dev_attrib.max_write_same_len = max_write_same_len; 700 pr_debug("dev[%p]: Set max_write_same_len: %u\n", 701 dev, dev->dev_attrib.max_write_same_len); 702 return 0; 703 } 704 705 static void dev_set_t10_wwn_model_alias(struct se_device *dev) 706 { 707 const char *configname; 708 709 configname = config_item_name(&dev->dev_group.cg_item); 710 if (strlen(configname) >= 16) { 711 pr_warn("dev[%p]: Backstore name '%s' is too long for " 712 "INQUIRY_MODEL, truncating to 16 bytes\n", dev, 713 configname); 714 } 715 snprintf(&dev->t10_wwn.model[0], 16, "%s", configname); 716 } 717 718 int se_dev_set_emulate_model_alias(struct se_device *dev, int flag) 719 { 720 if (dev->export_count) { 721 pr_err("dev[%p]: Unable to change model alias" 722 " while export_count is %d\n", 723 dev, dev->export_count); 724 return -EINVAL; 725 } 726 727 if (flag != 0 && flag != 1) { 728 pr_err("Illegal value %d\n", flag); 729 return -EINVAL; 730 } 731 732 if (flag) { 733 dev_set_t10_wwn_model_alias(dev); 734 } else { 735 strncpy(&dev->t10_wwn.model[0], 736 dev->transport->inquiry_prod, 16); 737 } 738 dev->dev_attrib.emulate_model_alias = flag; 739 740 return 0; 741 } 742 743 int se_dev_set_emulate_dpo(struct se_device *dev, int flag) 744 { 745 if (flag != 0 && flag != 1) { 746 pr_err("Illegal value %d\n", flag); 747 return -EINVAL; 748 } 749 750 if (flag) { 751 pr_err("dpo_emulated not supported\n"); 752 return -EINVAL; 753 } 754 755 return 0; 756 } 757 758 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag) 759 { 760 if (flag != 0 && flag != 1) { 761 pr_err("Illegal value %d\n", flag); 762 return -EINVAL; 763 } 764 765 if (flag && 766 dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 767 pr_err("emulate_fua_write not supported for pSCSI\n"); 768 return -EINVAL; 769 } 770 dev->dev_attrib.emulate_fua_write = flag; 771 pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n", 772 dev, dev->dev_attrib.emulate_fua_write); 773 return 0; 774 } 775 776 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag) 777 { 778 if (flag != 0 && flag != 1) { 779 pr_err("Illegal value %d\n", flag); 780 return -EINVAL; 781 } 782 783 if (flag) { 784 pr_err("ua read emulated not supported\n"); 785 return -EINVAL; 786 } 787 788 return 0; 789 } 790 791 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag) 792 { 793 if (flag != 0 && flag != 1) { 794 pr_err("Illegal value %d\n", flag); 795 return -EINVAL; 796 } 797 if (flag && 798 dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 799 pr_err("emulate_write_cache not supported for pSCSI\n"); 800 return -EINVAL; 801 } 802 if (flag && 803 dev->transport->get_write_cache) { 804 pr_err("emulate_write_cache not supported for this device\n"); 805 return -EINVAL; 806 } 807 808 dev->dev_attrib.emulate_write_cache = flag; 809 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 810 dev, dev->dev_attrib.emulate_write_cache); 811 return 0; 812 } 813 814 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag) 815 { 816 if ((flag != 0) && (flag != 1) && (flag != 2)) { 817 pr_err("Illegal value %d\n", flag); 818 return -EINVAL; 819 } 820 821 if (dev->export_count) { 822 pr_err("dev[%p]: Unable to change SE Device" 823 " UA_INTRLCK_CTRL while export_count is %d\n", 824 dev, dev->export_count); 825 return -EINVAL; 826 } 827 dev->dev_attrib.emulate_ua_intlck_ctrl = flag; 828 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 829 dev, dev->dev_attrib.emulate_ua_intlck_ctrl); 830 831 return 0; 832 } 833 834 int se_dev_set_emulate_tas(struct se_device *dev, int flag) 835 { 836 if ((flag != 0) && (flag != 1)) { 837 pr_err("Illegal value %d\n", flag); 838 return -EINVAL; 839 } 840 841 if (dev->export_count) { 842 pr_err("dev[%p]: Unable to change SE Device TAS while" 843 " export_count is %d\n", 844 dev, dev->export_count); 845 return -EINVAL; 846 } 847 dev->dev_attrib.emulate_tas = flag; 848 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 849 dev, (dev->dev_attrib.emulate_tas) ? "Enabled" : "Disabled"); 850 851 return 0; 852 } 853 854 int se_dev_set_emulate_tpu(struct se_device *dev, int flag) 855 { 856 if ((flag != 0) && (flag != 1)) { 857 pr_err("Illegal value %d\n", flag); 858 return -EINVAL; 859 } 860 /* 861 * We expect this value to be non-zero when generic Block Layer 862 * Discard supported is detected iblock_create_virtdevice(). 863 */ 864 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) { 865 pr_err("Generic Block Discard not supported\n"); 866 return -ENOSYS; 867 } 868 869 dev->dev_attrib.emulate_tpu = flag; 870 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 871 dev, flag); 872 return 0; 873 } 874 875 int se_dev_set_emulate_tpws(struct se_device *dev, int flag) 876 { 877 if ((flag != 0) && (flag != 1)) { 878 pr_err("Illegal value %d\n", flag); 879 return -EINVAL; 880 } 881 /* 882 * We expect this value to be non-zero when generic Block Layer 883 * Discard supported is detected iblock_create_virtdevice(). 884 */ 885 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) { 886 pr_err("Generic Block Discard not supported\n"); 887 return -ENOSYS; 888 } 889 890 dev->dev_attrib.emulate_tpws = flag; 891 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 892 dev, flag); 893 return 0; 894 } 895 896 int se_dev_set_emulate_caw(struct se_device *dev, int flag) 897 { 898 if (flag != 0 && flag != 1) { 899 pr_err("Illegal value %d\n", flag); 900 return -EINVAL; 901 } 902 dev->dev_attrib.emulate_caw = flag; 903 pr_debug("dev[%p]: SE Device CompareAndWrite (AtomicTestandSet): %d\n", 904 dev, flag); 905 906 return 0; 907 } 908 909 int se_dev_set_emulate_3pc(struct se_device *dev, int flag) 910 { 911 if (flag != 0 && flag != 1) { 912 pr_err("Illegal value %d\n", flag); 913 return -EINVAL; 914 } 915 dev->dev_attrib.emulate_3pc = flag; 916 pr_debug("dev[%p]: SE Device 3rd Party Copy (EXTENDED_COPY): %d\n", 917 dev, flag); 918 919 return 0; 920 } 921 922 int se_dev_set_pi_prot_type(struct se_device *dev, int flag) 923 { 924 int rc, old_prot = dev->dev_attrib.pi_prot_type; 925 926 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) { 927 pr_err("Illegal value %d for pi_prot_type\n", flag); 928 return -EINVAL; 929 } 930 if (flag == 2) { 931 pr_err("DIF TYPE2 protection currently not supported\n"); 932 return -ENOSYS; 933 } 934 if (dev->dev_attrib.hw_pi_prot_type) { 935 pr_warn("DIF protection enabled on underlying hardware," 936 " ignoring\n"); 937 return 0; 938 } 939 if (!dev->transport->init_prot || !dev->transport->free_prot) { 940 /* 0 is only allowed value for non-supporting backends */ 941 if (flag == 0) 942 return 0; 943 944 pr_err("DIF protection not supported by backend: %s\n", 945 dev->transport->name); 946 return -ENOSYS; 947 } 948 if (!(dev->dev_flags & DF_CONFIGURED)) { 949 pr_err("DIF protection requires device to be configured\n"); 950 return -ENODEV; 951 } 952 if (dev->export_count) { 953 pr_err("dev[%p]: Unable to change SE Device PROT type while" 954 " export_count is %d\n", dev, dev->export_count); 955 return -EINVAL; 956 } 957 958 dev->dev_attrib.pi_prot_type = flag; 959 960 if (flag && !old_prot) { 961 rc = dev->transport->init_prot(dev); 962 if (rc) { 963 dev->dev_attrib.pi_prot_type = old_prot; 964 return rc; 965 } 966 967 } else if (!flag && old_prot) { 968 dev->transport->free_prot(dev); 969 } 970 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag); 971 972 return 0; 973 } 974 975 int se_dev_set_pi_prot_format(struct se_device *dev, int flag) 976 { 977 int rc; 978 979 if (!flag) 980 return 0; 981 982 if (flag != 1) { 983 pr_err("Illegal value %d for pi_prot_format\n", flag); 984 return -EINVAL; 985 } 986 if (!dev->transport->format_prot) { 987 pr_err("DIF protection format not supported by backend %s\n", 988 dev->transport->name); 989 return -ENOSYS; 990 } 991 if (!(dev->dev_flags & DF_CONFIGURED)) { 992 pr_err("DIF protection format requires device to be configured\n"); 993 return -ENODEV; 994 } 995 if (dev->export_count) { 996 pr_err("dev[%p]: Unable to format SE Device PROT type while" 997 " export_count is %d\n", dev, dev->export_count); 998 return -EINVAL; 999 } 1000 1001 rc = dev->transport->format_prot(dev); 1002 if (rc) 1003 return rc; 1004 1005 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev); 1006 1007 return 0; 1008 } 1009 1010 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag) 1011 { 1012 if ((flag != 0) && (flag != 1)) { 1013 pr_err("Illegal value %d\n", flag); 1014 return -EINVAL; 1015 } 1016 dev->dev_attrib.enforce_pr_isids = flag; 1017 pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev, 1018 (dev->dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled"); 1019 return 0; 1020 } 1021 1022 int se_dev_set_is_nonrot(struct se_device *dev, int flag) 1023 { 1024 if ((flag != 0) && (flag != 1)) { 1025 printk(KERN_ERR "Illegal value %d\n", flag); 1026 return -EINVAL; 1027 } 1028 dev->dev_attrib.is_nonrot = flag; 1029 pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n", 1030 dev, flag); 1031 return 0; 1032 } 1033 1034 int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag) 1035 { 1036 if (flag != 0) { 1037 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted" 1038 " reordering not implemented\n", dev); 1039 return -ENOSYS; 1040 } 1041 dev->dev_attrib.emulate_rest_reord = flag; 1042 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag); 1043 return 0; 1044 } 1045 1046 /* 1047 * Note, this can only be called on unexported SE Device Object. 1048 */ 1049 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth) 1050 { 1051 if (dev->export_count) { 1052 pr_err("dev[%p]: Unable to change SE Device TCQ while" 1053 " export_count is %d\n", 1054 dev, dev->export_count); 1055 return -EINVAL; 1056 } 1057 if (!queue_depth) { 1058 pr_err("dev[%p]: Illegal ZERO value for queue" 1059 "_depth\n", dev); 1060 return -EINVAL; 1061 } 1062 1063 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1064 if (queue_depth > dev->dev_attrib.hw_queue_depth) { 1065 pr_err("dev[%p]: Passed queue_depth: %u" 1066 " exceeds TCM/SE_Device TCQ: %u\n", 1067 dev, queue_depth, 1068 dev->dev_attrib.hw_queue_depth); 1069 return -EINVAL; 1070 } 1071 } else { 1072 if (queue_depth > dev->dev_attrib.queue_depth) { 1073 if (queue_depth > dev->dev_attrib.hw_queue_depth) { 1074 pr_err("dev[%p]: Passed queue_depth:" 1075 " %u exceeds TCM/SE_Device MAX" 1076 " TCQ: %u\n", dev, queue_depth, 1077 dev->dev_attrib.hw_queue_depth); 1078 return -EINVAL; 1079 } 1080 } 1081 } 1082 1083 dev->dev_attrib.queue_depth = dev->queue_depth = queue_depth; 1084 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", 1085 dev, queue_depth); 1086 return 0; 1087 } 1088 1089 int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors) 1090 { 1091 int block_size = dev->dev_attrib.block_size; 1092 1093 if (dev->export_count) { 1094 pr_err("dev[%p]: Unable to change SE Device" 1095 " fabric_max_sectors while export_count is %d\n", 1096 dev, dev->export_count); 1097 return -EINVAL; 1098 } 1099 if (!fabric_max_sectors) { 1100 pr_err("dev[%p]: Illegal ZERO value for" 1101 " fabric_max_sectors\n", dev); 1102 return -EINVAL; 1103 } 1104 if (fabric_max_sectors < DA_STATUS_MAX_SECTORS_MIN) { 1105 pr_err("dev[%p]: Passed fabric_max_sectors: %u less than" 1106 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, fabric_max_sectors, 1107 DA_STATUS_MAX_SECTORS_MIN); 1108 return -EINVAL; 1109 } 1110 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1111 if (fabric_max_sectors > dev->dev_attrib.hw_max_sectors) { 1112 pr_err("dev[%p]: Passed fabric_max_sectors: %u" 1113 " greater than TCM/SE_Device max_sectors:" 1114 " %u\n", dev, fabric_max_sectors, 1115 dev->dev_attrib.hw_max_sectors); 1116 return -EINVAL; 1117 } 1118 } else { 1119 if (fabric_max_sectors > DA_STATUS_MAX_SECTORS_MAX) { 1120 pr_err("dev[%p]: Passed fabric_max_sectors: %u" 1121 " greater than DA_STATUS_MAX_SECTORS_MAX:" 1122 " %u\n", dev, fabric_max_sectors, 1123 DA_STATUS_MAX_SECTORS_MAX); 1124 return -EINVAL; 1125 } 1126 } 1127 /* 1128 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks() 1129 */ 1130 if (!block_size) { 1131 block_size = 512; 1132 pr_warn("Defaulting to 512 for zero block_size\n"); 1133 } 1134 fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors, 1135 block_size); 1136 1137 dev->dev_attrib.fabric_max_sectors = fabric_max_sectors; 1138 pr_debug("dev[%p]: SE Device max_sectors changed to %u\n", 1139 dev, fabric_max_sectors); 1140 return 0; 1141 } 1142 1143 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors) 1144 { 1145 if (dev->export_count) { 1146 pr_err("dev[%p]: Unable to change SE Device" 1147 " optimal_sectors while export_count is %d\n", 1148 dev, dev->export_count); 1149 return -EINVAL; 1150 } 1151 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1152 pr_err("dev[%p]: Passed optimal_sectors cannot be" 1153 " changed for TCM/pSCSI\n", dev); 1154 return -EINVAL; 1155 } 1156 if (optimal_sectors > dev->dev_attrib.fabric_max_sectors) { 1157 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1158 " greater than fabric_max_sectors: %u\n", dev, 1159 optimal_sectors, dev->dev_attrib.fabric_max_sectors); 1160 return -EINVAL; 1161 } 1162 1163 dev->dev_attrib.optimal_sectors = optimal_sectors; 1164 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1165 dev, optimal_sectors); 1166 return 0; 1167 } 1168 1169 int se_dev_set_block_size(struct se_device *dev, u32 block_size) 1170 { 1171 if (dev->export_count) { 1172 pr_err("dev[%p]: Unable to change SE Device block_size" 1173 " while export_count is %d\n", 1174 dev, dev->export_count); 1175 return -EINVAL; 1176 } 1177 1178 if ((block_size != 512) && 1179 (block_size != 1024) && 1180 (block_size != 2048) && 1181 (block_size != 4096)) { 1182 pr_err("dev[%p]: Illegal value for block_device: %u" 1183 " for SE device, must be 512, 1024, 2048 or 4096\n", 1184 dev, block_size); 1185 return -EINVAL; 1186 } 1187 1188 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1189 pr_err("dev[%p]: Not allowed to change block_size for" 1190 " Physical Device, use for Linux/SCSI to change" 1191 " block_size for underlying hardware\n", dev); 1192 return -EINVAL; 1193 } 1194 1195 dev->dev_attrib.block_size = block_size; 1196 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1197 dev, block_size); 1198 1199 if (dev->dev_attrib.max_bytes_per_io) 1200 dev->dev_attrib.hw_max_sectors = 1201 dev->dev_attrib.max_bytes_per_io / block_size; 1202 1203 return 0; 1204 } 1205 1206 struct se_lun *core_dev_add_lun( 1207 struct se_portal_group *tpg, 1208 struct se_device *dev, 1209 u32 unpacked_lun) 1210 { 1211 struct se_lun *lun; 1212 int rc; 1213 1214 lun = core_tpg_alloc_lun(tpg, unpacked_lun); 1215 if (IS_ERR(lun)) 1216 return lun; 1217 1218 rc = core_tpg_add_lun(tpg, lun, 1219 TRANSPORT_LUNFLAGS_READ_WRITE, dev); 1220 if (rc < 0) 1221 return ERR_PTR(rc); 1222 1223 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from" 1224 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1225 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, 1226 tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id); 1227 /* 1228 * Update LUN maps for dynamically added initiators when 1229 * generate_node_acl is enabled. 1230 */ 1231 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) { 1232 struct se_node_acl *acl; 1233 spin_lock_irq(&tpg->acl_node_lock); 1234 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { 1235 if (acl->dynamic_node_acl && 1236 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only || 1237 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) { 1238 spin_unlock_irq(&tpg->acl_node_lock); 1239 core_tpg_add_node_to_devs(acl, tpg); 1240 spin_lock_irq(&tpg->acl_node_lock); 1241 } 1242 } 1243 spin_unlock_irq(&tpg->acl_node_lock); 1244 } 1245 1246 return lun; 1247 } 1248 1249 /* core_dev_del_lun(): 1250 * 1251 * 1252 */ 1253 int core_dev_del_lun( 1254 struct se_portal_group *tpg, 1255 u32 unpacked_lun) 1256 { 1257 struct se_lun *lun; 1258 1259 lun = core_tpg_pre_dellun(tpg, unpacked_lun); 1260 if (IS_ERR(lun)) 1261 return PTR_ERR(lun); 1262 1263 core_tpg_post_dellun(tpg, lun); 1264 1265 pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from" 1266 " device object\n", tpg->se_tpg_tfo->get_fabric_name(), 1267 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, 1268 tpg->se_tpg_tfo->get_fabric_name()); 1269 1270 return 0; 1271 } 1272 1273 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun) 1274 { 1275 struct se_lun *lun; 1276 1277 spin_lock(&tpg->tpg_lun_lock); 1278 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1279 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS" 1280 "_PER_TPG-1: %u for Target Portal Group: %hu\n", 1281 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1282 TRANSPORT_MAX_LUNS_PER_TPG-1, 1283 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1284 spin_unlock(&tpg->tpg_lun_lock); 1285 return NULL; 1286 } 1287 lun = tpg->tpg_lun_list[unpacked_lun]; 1288 1289 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) { 1290 pr_err("%s Logical Unit Number: %u is not free on" 1291 " Target Portal Group: %hu, ignoring request.\n", 1292 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1293 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1294 spin_unlock(&tpg->tpg_lun_lock); 1295 return NULL; 1296 } 1297 spin_unlock(&tpg->tpg_lun_lock); 1298 1299 return lun; 1300 } 1301 1302 /* core_dev_get_lun(): 1303 * 1304 * 1305 */ 1306 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun) 1307 { 1308 struct se_lun *lun; 1309 1310 spin_lock(&tpg->tpg_lun_lock); 1311 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1312 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER" 1313 "_TPG-1: %u for Target Portal Group: %hu\n", 1314 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1315 TRANSPORT_MAX_LUNS_PER_TPG-1, 1316 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1317 spin_unlock(&tpg->tpg_lun_lock); 1318 return NULL; 1319 } 1320 lun = tpg->tpg_lun_list[unpacked_lun]; 1321 1322 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { 1323 pr_err("%s Logical Unit Number: %u is not active on" 1324 " Target Portal Group: %hu, ignoring request.\n", 1325 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1326 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1327 spin_unlock(&tpg->tpg_lun_lock); 1328 return NULL; 1329 } 1330 spin_unlock(&tpg->tpg_lun_lock); 1331 1332 return lun; 1333 } 1334 1335 struct se_lun_acl *core_dev_init_initiator_node_lun_acl( 1336 struct se_portal_group *tpg, 1337 struct se_node_acl *nacl, 1338 u32 mapped_lun, 1339 int *ret) 1340 { 1341 struct se_lun_acl *lacl; 1342 1343 if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) { 1344 pr_err("%s InitiatorName exceeds maximum size.\n", 1345 tpg->se_tpg_tfo->get_fabric_name()); 1346 *ret = -EOVERFLOW; 1347 return NULL; 1348 } 1349 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL); 1350 if (!lacl) { 1351 pr_err("Unable to allocate memory for struct se_lun_acl.\n"); 1352 *ret = -ENOMEM; 1353 return NULL; 1354 } 1355 1356 INIT_LIST_HEAD(&lacl->lacl_list); 1357 lacl->mapped_lun = mapped_lun; 1358 lacl->se_lun_nacl = nacl; 1359 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", 1360 nacl->initiatorname); 1361 1362 return lacl; 1363 } 1364 1365 int core_dev_add_initiator_node_lun_acl( 1366 struct se_portal_group *tpg, 1367 struct se_lun_acl *lacl, 1368 u32 unpacked_lun, 1369 u32 lun_access) 1370 { 1371 struct se_lun *lun; 1372 struct se_node_acl *nacl; 1373 1374 lun = core_dev_get_lun(tpg, unpacked_lun); 1375 if (!lun) { 1376 pr_err("%s Logical Unit Number: %u is not active on" 1377 " Target Portal Group: %hu, ignoring request.\n", 1378 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1379 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1380 return -EINVAL; 1381 } 1382 1383 nacl = lacl->se_lun_nacl; 1384 if (!nacl) 1385 return -EINVAL; 1386 1387 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) && 1388 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE)) 1389 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; 1390 1391 lacl->se_lun = lun; 1392 1393 if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun, 1394 lun_access, nacl, tpg) < 0) 1395 return -EINVAL; 1396 1397 spin_lock(&lun->lun_acl_lock); 1398 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list); 1399 atomic_inc(&lun->lun_acl_count); 1400 smp_mb__after_atomic(); 1401 spin_unlock(&lun->lun_acl_lock); 1402 1403 pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for " 1404 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(), 1405 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun, 1406 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO", 1407 lacl->initiatorname); 1408 /* 1409 * Check to see if there are any existing persistent reservation APTPL 1410 * pre-registrations that need to be enabled for this LUN ACL.. 1411 */ 1412 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl); 1413 return 0; 1414 } 1415 1416 /* core_dev_del_initiator_node_lun_acl(): 1417 * 1418 * 1419 */ 1420 int core_dev_del_initiator_node_lun_acl( 1421 struct se_portal_group *tpg, 1422 struct se_lun *lun, 1423 struct se_lun_acl *lacl) 1424 { 1425 struct se_node_acl *nacl; 1426 1427 nacl = lacl->se_lun_nacl; 1428 if (!nacl) 1429 return -EINVAL; 1430 1431 spin_lock(&lun->lun_acl_lock); 1432 list_del(&lacl->lacl_list); 1433 atomic_dec(&lun->lun_acl_count); 1434 smp_mb__after_atomic(); 1435 spin_unlock(&lun->lun_acl_lock); 1436 1437 core_disable_device_list_for_node(lun, NULL, lacl->mapped_lun, 1438 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg); 1439 1440 lacl->se_lun = NULL; 1441 1442 pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for" 1443 " InitiatorNode: %s Mapped LUN: %u\n", 1444 tpg->se_tpg_tfo->get_fabric_name(), 1445 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, 1446 lacl->initiatorname, lacl->mapped_lun); 1447 1448 return 0; 1449 } 1450 1451 void core_dev_free_initiator_node_lun_acl( 1452 struct se_portal_group *tpg, 1453 struct se_lun_acl *lacl) 1454 { 1455 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s" 1456 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1457 tpg->se_tpg_tfo->tpg_get_tag(tpg), 1458 tpg->se_tpg_tfo->get_fabric_name(), 1459 lacl->initiatorname, lacl->mapped_lun); 1460 1461 kfree(lacl); 1462 } 1463 1464 static void scsi_dump_inquiry(struct se_device *dev) 1465 { 1466 struct t10_wwn *wwn = &dev->t10_wwn; 1467 char buf[17]; 1468 int i, device_type; 1469 /* 1470 * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer 1471 */ 1472 for (i = 0; i < 8; i++) 1473 if (wwn->vendor[i] >= 0x20) 1474 buf[i] = wwn->vendor[i]; 1475 else 1476 buf[i] = ' '; 1477 buf[i] = '\0'; 1478 pr_debug(" Vendor: %s\n", buf); 1479 1480 for (i = 0; i < 16; i++) 1481 if (wwn->model[i] >= 0x20) 1482 buf[i] = wwn->model[i]; 1483 else 1484 buf[i] = ' '; 1485 buf[i] = '\0'; 1486 pr_debug(" Model: %s\n", buf); 1487 1488 for (i = 0; i < 4; i++) 1489 if (wwn->revision[i] >= 0x20) 1490 buf[i] = wwn->revision[i]; 1491 else 1492 buf[i] = ' '; 1493 buf[i] = '\0'; 1494 pr_debug(" Revision: %s\n", buf); 1495 1496 device_type = dev->transport->get_device_type(dev); 1497 pr_debug(" Type: %s ", scsi_device_type(device_type)); 1498 } 1499 1500 struct se_device *target_alloc_device(struct se_hba *hba, const char *name) 1501 { 1502 struct se_device *dev; 1503 struct se_lun *xcopy_lun; 1504 1505 dev = hba->transport->alloc_device(hba, name); 1506 if (!dev) 1507 return NULL; 1508 1509 dev->dev_link_magic = SE_DEV_LINK_MAGIC; 1510 dev->se_hba = hba; 1511 dev->transport = hba->transport; 1512 dev->prot_length = sizeof(struct se_dif_v1_tuple); 1513 1514 INIT_LIST_HEAD(&dev->dev_list); 1515 INIT_LIST_HEAD(&dev->dev_sep_list); 1516 INIT_LIST_HEAD(&dev->dev_tmr_list); 1517 INIT_LIST_HEAD(&dev->delayed_cmd_list); 1518 INIT_LIST_HEAD(&dev->state_list); 1519 INIT_LIST_HEAD(&dev->qf_cmd_list); 1520 INIT_LIST_HEAD(&dev->g_dev_node); 1521 spin_lock_init(&dev->execute_task_lock); 1522 spin_lock_init(&dev->delayed_cmd_lock); 1523 spin_lock_init(&dev->dev_reservation_lock); 1524 spin_lock_init(&dev->se_port_lock); 1525 spin_lock_init(&dev->se_tmr_lock); 1526 spin_lock_init(&dev->qf_cmd_lock); 1527 sema_init(&dev->caw_sem, 1); 1528 atomic_set(&dev->dev_ordered_id, 0); 1529 INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list); 1530 spin_lock_init(&dev->t10_wwn.t10_vpd_lock); 1531 INIT_LIST_HEAD(&dev->t10_pr.registration_list); 1532 INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list); 1533 spin_lock_init(&dev->t10_pr.registration_lock); 1534 spin_lock_init(&dev->t10_pr.aptpl_reg_lock); 1535 INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list); 1536 spin_lock_init(&dev->t10_alua.tg_pt_gps_lock); 1537 INIT_LIST_HEAD(&dev->t10_alua.lba_map_list); 1538 spin_lock_init(&dev->t10_alua.lba_map_lock); 1539 1540 dev->t10_wwn.t10_dev = dev; 1541 dev->t10_alua.t10_dev = dev; 1542 1543 dev->dev_attrib.da_dev = dev; 1544 dev->dev_attrib.emulate_model_alias = DA_EMULATE_MODEL_ALIAS; 1545 dev->dev_attrib.emulate_dpo = DA_EMULATE_DPO; 1546 dev->dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE; 1547 dev->dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ; 1548 dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE; 1549 dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL; 1550 dev->dev_attrib.emulate_tas = DA_EMULATE_TAS; 1551 dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU; 1552 dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS; 1553 dev->dev_attrib.emulate_caw = DA_EMULATE_CAW; 1554 dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC; 1555 dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE0_PROT; 1556 dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS; 1557 dev->dev_attrib.is_nonrot = DA_IS_NONROT; 1558 dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD; 1559 dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT; 1560 dev->dev_attrib.max_unmap_block_desc_count = 1561 DA_MAX_UNMAP_BLOCK_DESC_COUNT; 1562 dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT; 1563 dev->dev_attrib.unmap_granularity_alignment = 1564 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT; 1565 dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN; 1566 dev->dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS; 1567 dev->dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS; 1568 1569 xcopy_lun = &dev->xcopy_lun; 1570 xcopy_lun->lun_se_dev = dev; 1571 init_completion(&xcopy_lun->lun_shutdown_comp); 1572 INIT_LIST_HEAD(&xcopy_lun->lun_acl_list); 1573 spin_lock_init(&xcopy_lun->lun_acl_lock); 1574 spin_lock_init(&xcopy_lun->lun_sep_lock); 1575 init_completion(&xcopy_lun->lun_ref_comp); 1576 1577 return dev; 1578 } 1579 1580 int target_configure_device(struct se_device *dev) 1581 { 1582 struct se_hba *hba = dev->se_hba; 1583 int ret; 1584 1585 if (dev->dev_flags & DF_CONFIGURED) { 1586 pr_err("se_dev->se_dev_ptr already set for storage" 1587 " object\n"); 1588 return -EEXIST; 1589 } 1590 1591 ret = dev->transport->configure_device(dev); 1592 if (ret) 1593 goto out; 1594 dev->dev_flags |= DF_CONFIGURED; 1595 1596 /* 1597 * XXX: there is not much point to have two different values here.. 1598 */ 1599 dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size; 1600 dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth; 1601 1602 /* 1603 * Align max_hw_sectors down to PAGE_SIZE I/O transfers 1604 */ 1605 dev->dev_attrib.hw_max_sectors = 1606 se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors, 1607 dev->dev_attrib.hw_block_size); 1608 1609 dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX); 1610 dev->creation_time = get_jiffies_64(); 1611 1612 ret = core_setup_alua(dev); 1613 if (ret) 1614 goto out; 1615 1616 /* 1617 * Startup the struct se_device processing thread 1618 */ 1619 dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1, 1620 dev->transport->name); 1621 if (!dev->tmr_wq) { 1622 pr_err("Unable to create tmr workqueue for %s\n", 1623 dev->transport->name); 1624 ret = -ENOMEM; 1625 goto out_free_alua; 1626 } 1627 1628 /* 1629 * Setup work_queue for QUEUE_FULL 1630 */ 1631 INIT_WORK(&dev->qf_work_queue, target_qf_do_work); 1632 1633 /* 1634 * Preload the initial INQUIRY const values if we are doing 1635 * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI 1636 * passthrough because this is being provided by the backend LLD. 1637 */ 1638 if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) { 1639 strncpy(&dev->t10_wwn.vendor[0], "LIO-ORG", 8); 1640 strncpy(&dev->t10_wwn.model[0], 1641 dev->transport->inquiry_prod, 16); 1642 strncpy(&dev->t10_wwn.revision[0], 1643 dev->transport->inquiry_rev, 4); 1644 } 1645 1646 scsi_dump_inquiry(dev); 1647 1648 spin_lock(&hba->device_lock); 1649 hba->dev_count++; 1650 spin_unlock(&hba->device_lock); 1651 1652 mutex_lock(&g_device_mutex); 1653 list_add_tail(&dev->g_dev_node, &g_device_list); 1654 mutex_unlock(&g_device_mutex); 1655 1656 return 0; 1657 1658 out_free_alua: 1659 core_alua_free_lu_gp_mem(dev); 1660 out: 1661 se_release_vpd_for_dev(dev); 1662 return ret; 1663 } 1664 1665 void target_free_device(struct se_device *dev) 1666 { 1667 struct se_hba *hba = dev->se_hba; 1668 1669 WARN_ON(!list_empty(&dev->dev_sep_list)); 1670 1671 if (dev->dev_flags & DF_CONFIGURED) { 1672 destroy_workqueue(dev->tmr_wq); 1673 1674 mutex_lock(&g_device_mutex); 1675 list_del(&dev->g_dev_node); 1676 mutex_unlock(&g_device_mutex); 1677 1678 spin_lock(&hba->device_lock); 1679 hba->dev_count--; 1680 spin_unlock(&hba->device_lock); 1681 } 1682 1683 core_alua_free_lu_gp_mem(dev); 1684 core_alua_set_lba_map(dev, NULL, 0, 0); 1685 core_scsi3_free_all_registrations(dev); 1686 se_release_vpd_for_dev(dev); 1687 1688 if (dev->transport->free_prot) 1689 dev->transport->free_prot(dev); 1690 1691 dev->transport->free_device(dev); 1692 } 1693 1694 int core_dev_setup_virtual_lun0(void) 1695 { 1696 struct se_hba *hba; 1697 struct se_device *dev; 1698 char buf[] = "rd_pages=8,rd_nullio=1"; 1699 int ret; 1700 1701 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE); 1702 if (IS_ERR(hba)) 1703 return PTR_ERR(hba); 1704 1705 dev = target_alloc_device(hba, "virt_lun0"); 1706 if (!dev) { 1707 ret = -ENOMEM; 1708 goto out_free_hba; 1709 } 1710 1711 hba->transport->set_configfs_dev_params(dev, buf, sizeof(buf)); 1712 1713 ret = target_configure_device(dev); 1714 if (ret) 1715 goto out_free_se_dev; 1716 1717 lun0_hba = hba; 1718 g_lun0_dev = dev; 1719 return 0; 1720 1721 out_free_se_dev: 1722 target_free_device(dev); 1723 out_free_hba: 1724 core_delete_hba(hba); 1725 return ret; 1726 } 1727 1728 1729 void core_dev_release_virtual_lun0(void) 1730 { 1731 struct se_hba *hba = lun0_hba; 1732 1733 if (!hba) 1734 return; 1735 1736 if (g_lun0_dev) 1737 target_free_device(g_lun0_dev); 1738 core_delete_hba(hba); 1739 } 1740