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 <asm/unaligned.h> 37#include <net/sock.h> 38#include <net/tcp.h> 39#include <scsi/scsi.h> 40#include <scsi/scsi_device.h> 41 42#include <target/target_core_base.h> 43#include <target/target_core_backend.h> 44#include <target/target_core_fabric.h> 45 46#include "target_core_internal.h" 47#include "target_core_alua.h" 48#include "target_core_pr.h" 49#include "target_core_ua.h" 50 51DEFINE_MUTEX(g_device_mutex); 52LIST_HEAD(g_device_list); 53 54static struct se_hba *lun0_hba; 55/* not static, needed by tpg.c */ 56struct se_device *g_lun0_dev; 57 58sense_reason_t 59transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun) 60{ 61 struct se_lun *se_lun = NULL; 62 struct se_session *se_sess = se_cmd->se_sess; 63 struct se_device *dev; 64 unsigned long flags; 65 66 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) 67 return TCM_NON_EXISTENT_LUN; 68 69 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags); 70 se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun]; 71 if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 72 struct se_dev_entry *deve = se_cmd->se_deve; 73 74 deve->total_cmds++; 75 76 if ((se_cmd->data_direction == DMA_TO_DEVICE) && 77 (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) { 78 pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN" 79 " Access for 0x%08x\n", 80 se_cmd->se_tfo->get_fabric_name(), 81 unpacked_lun); 82 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); 83 return TCM_WRITE_PROTECTED; 84 } 85 86 if (se_cmd->data_direction == DMA_TO_DEVICE) 87 deve->write_bytes += se_cmd->data_length; 88 else if (se_cmd->data_direction == DMA_FROM_DEVICE) 89 deve->read_bytes += se_cmd->data_length; 90 91 se_lun = deve->se_lun; 92 se_cmd->se_lun = deve->se_lun; 93 se_cmd->pr_res_key = deve->pr_res_key; 94 se_cmd->orig_fe_lun = unpacked_lun; 95 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; 96 97 percpu_ref_get(&se_lun->lun_ref); 98 se_cmd->lun_ref_active = true; 99 } 100 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); 101 102 if (!se_lun) { 103 /* 104 * Use the se_portal_group->tpg_virt_lun0 to allow for 105 * REPORT_LUNS, et al to be returned when no active 106 * MappedLUN=0 exists for this Initiator Port. 107 */ 108 if (unpacked_lun != 0) { 109 pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" 110 " Access for 0x%08x\n", 111 se_cmd->se_tfo->get_fabric_name(), 112 unpacked_lun); 113 return TCM_NON_EXISTENT_LUN; 114 } 115 /* 116 * Force WRITE PROTECT for virtual LUN 0 117 */ 118 if ((se_cmd->data_direction != DMA_FROM_DEVICE) && 119 (se_cmd->data_direction != DMA_NONE)) 120 return TCM_WRITE_PROTECTED; 121 122 se_lun = &se_sess->se_tpg->tpg_virt_lun0; 123 se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0; 124 se_cmd->orig_fe_lun = 0; 125 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; 126 127 percpu_ref_get(&se_lun->lun_ref); 128 se_cmd->lun_ref_active = true; 129 } 130 131 /* Directly associate cmd with se_dev */ 132 se_cmd->se_dev = se_lun->lun_se_dev; 133 134 dev = se_lun->lun_se_dev; 135 atomic_long_inc(&dev->num_cmds); 136 if (se_cmd->data_direction == DMA_TO_DEVICE) 137 atomic_long_add(se_cmd->data_length, &dev->write_bytes); 138 else if (se_cmd->data_direction == DMA_FROM_DEVICE) 139 atomic_long_add(se_cmd->data_length, &dev->read_bytes); 140 141 return 0; 142} 143EXPORT_SYMBOL(transport_lookup_cmd_lun); 144 145int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun) 146{ 147 struct se_dev_entry *deve; 148 struct se_lun *se_lun = NULL; 149 struct se_session *se_sess = se_cmd->se_sess; 150 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req; 151 unsigned long flags; 152 153 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) 154 return -ENODEV; 155 156 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags); 157 se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun]; 158 deve = se_cmd->se_deve; 159 160 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 161 se_tmr->tmr_lun = deve->se_lun; 162 se_cmd->se_lun = deve->se_lun; 163 se_lun = deve->se_lun; 164 se_cmd->pr_res_key = deve->pr_res_key; 165 se_cmd->orig_fe_lun = unpacked_lun; 166 } 167 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); 168 169 if (!se_lun) { 170 pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" 171 " Access for 0x%08x\n", 172 se_cmd->se_tfo->get_fabric_name(), 173 unpacked_lun); 174 return -ENODEV; 175 } 176 177 /* Directly associate cmd with se_dev */ 178 se_cmd->se_dev = se_lun->lun_se_dev; 179 se_tmr->tmr_dev = se_lun->lun_se_dev; 180 181 spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags); 182 list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list); 183 spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags); 184 185 return 0; 186} 187EXPORT_SYMBOL(transport_lookup_tmr_lun); 188 189/* 190 * This function is called from core_scsi3_emulate_pro_register_and_move() 191 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count 192 * when a matching rtpi is found. 193 */ 194struct se_dev_entry *core_get_se_deve_from_rtpi( 195 struct se_node_acl *nacl, 196 u16 rtpi) 197{ 198 struct se_dev_entry *deve; 199 struct se_lun *lun; 200 struct se_port *port; 201 struct se_portal_group *tpg = nacl->se_tpg; 202 u32 i; 203 204 spin_lock_irq(&nacl->device_list_lock); 205 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 206 deve = nacl->device_list[i]; 207 208 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 209 continue; 210 211 lun = deve->se_lun; 212 if (!lun) { 213 pr_err("%s device entries device pointer is" 214 " NULL, but Initiator has access.\n", 215 tpg->se_tpg_tfo->get_fabric_name()); 216 continue; 217 } 218 port = lun->lun_sep; 219 if (!port) { 220 pr_err("%s device entries device pointer is" 221 " NULL, but Initiator has access.\n", 222 tpg->se_tpg_tfo->get_fabric_name()); 223 continue; 224 } 225 if (port->sep_rtpi != rtpi) 226 continue; 227 228 atomic_inc_mb(&deve->pr_ref_count); 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 238int 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 277void 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 */ 300int 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 */ 377int 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 */ 431void 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 461static 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 } 483again: 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 513static 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_flags & TRANSPORT_FLAG_PASSTHROUGH) && 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 */ 555static 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 574int 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 596void 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 623static 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 636static 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 654bool se_dev_check_wce(struct se_device *dev) 655{ 656 bool wce = false; 657 658 if (dev->transport->get_write_cache) 659 wce = dev->transport->get_write_cache(dev); 660 else if (dev->dev_attrib.emulate_write_cache > 0) 661 wce = true; 662 663 return wce; 664} 665 666int se_dev_set_max_unmap_lba_count( 667 struct se_device *dev, 668 u32 max_unmap_lba_count) 669{ 670 dev->dev_attrib.max_unmap_lba_count = max_unmap_lba_count; 671 pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n", 672 dev, dev->dev_attrib.max_unmap_lba_count); 673 return 0; 674} 675EXPORT_SYMBOL(se_dev_set_max_unmap_lba_count); 676 677int se_dev_set_max_unmap_block_desc_count( 678 struct se_device *dev, 679 u32 max_unmap_block_desc_count) 680{ 681 dev->dev_attrib.max_unmap_block_desc_count = 682 max_unmap_block_desc_count; 683 pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n", 684 dev, dev->dev_attrib.max_unmap_block_desc_count); 685 return 0; 686} 687EXPORT_SYMBOL(se_dev_set_max_unmap_block_desc_count); 688 689int se_dev_set_unmap_granularity( 690 struct se_device *dev, 691 u32 unmap_granularity) 692{ 693 dev->dev_attrib.unmap_granularity = unmap_granularity; 694 pr_debug("dev[%p]: Set unmap_granularity: %u\n", 695 dev, dev->dev_attrib.unmap_granularity); 696 return 0; 697} 698EXPORT_SYMBOL(se_dev_set_unmap_granularity); 699 700int se_dev_set_unmap_granularity_alignment( 701 struct se_device *dev, 702 u32 unmap_granularity_alignment) 703{ 704 dev->dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment; 705 pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n", 706 dev, dev->dev_attrib.unmap_granularity_alignment); 707 return 0; 708} 709EXPORT_SYMBOL(se_dev_set_unmap_granularity_alignment); 710 711int se_dev_set_max_write_same_len( 712 struct se_device *dev, 713 u32 max_write_same_len) 714{ 715 dev->dev_attrib.max_write_same_len = max_write_same_len; 716 pr_debug("dev[%p]: Set max_write_same_len: %u\n", 717 dev, dev->dev_attrib.max_write_same_len); 718 return 0; 719} 720EXPORT_SYMBOL(se_dev_set_max_write_same_len); 721 722static void dev_set_t10_wwn_model_alias(struct se_device *dev) 723{ 724 const char *configname; 725 726 configname = config_item_name(&dev->dev_group.cg_item); 727 if (strlen(configname) >= 16) { 728 pr_warn("dev[%p]: Backstore name '%s' is too long for " 729 "INQUIRY_MODEL, truncating to 16 bytes\n", dev, 730 configname); 731 } 732 snprintf(&dev->t10_wwn.model[0], 16, "%s", configname); 733} 734 735int se_dev_set_emulate_model_alias(struct se_device *dev, int flag) 736{ 737 if (dev->export_count) { 738 pr_err("dev[%p]: Unable to change model alias" 739 " while export_count is %d\n", 740 dev, dev->export_count); 741 return -EINVAL; 742 } 743 744 if (flag != 0 && flag != 1) { 745 pr_err("Illegal value %d\n", flag); 746 return -EINVAL; 747 } 748 749 if (flag) { 750 dev_set_t10_wwn_model_alias(dev); 751 } else { 752 strncpy(&dev->t10_wwn.model[0], 753 dev->transport->inquiry_prod, 16); 754 } 755 dev->dev_attrib.emulate_model_alias = flag; 756 757 return 0; 758} 759EXPORT_SYMBOL(se_dev_set_emulate_model_alias); 760 761int se_dev_set_emulate_dpo(struct se_device *dev, int flag) 762{ 763 if (flag != 0 && flag != 1) { 764 pr_err("Illegal value %d\n", flag); 765 return -EINVAL; 766 } 767 768 if (flag) { 769 pr_err("dpo_emulated not supported\n"); 770 return -EINVAL; 771 } 772 773 return 0; 774} 775EXPORT_SYMBOL(se_dev_set_emulate_dpo); 776 777int se_dev_set_emulate_fua_write(struct se_device *dev, int flag) 778{ 779 if (flag != 0 && flag != 1) { 780 pr_err("Illegal value %d\n", flag); 781 return -EINVAL; 782 } 783 if (flag && 784 dev->transport->get_write_cache) { 785 pr_warn("emulate_fua_write not supported for this device, ignoring\n"); 786 return 0; 787 } 788 if (dev->export_count) { 789 pr_err("emulate_fua_write cannot be changed with active" 790 " exports: %d\n", dev->export_count); 791 return -EINVAL; 792 } 793 dev->dev_attrib.emulate_fua_write = flag; 794 pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n", 795 dev, dev->dev_attrib.emulate_fua_write); 796 return 0; 797} 798EXPORT_SYMBOL(se_dev_set_emulate_fua_write); 799 800int se_dev_set_emulate_fua_read(struct se_device *dev, int flag) 801{ 802 if (flag != 0 && flag != 1) { 803 pr_err("Illegal value %d\n", flag); 804 return -EINVAL; 805 } 806 807 if (flag) { 808 pr_err("ua read emulated not supported\n"); 809 return -EINVAL; 810 } 811 812 return 0; 813} 814EXPORT_SYMBOL(se_dev_set_emulate_fua_read); 815 816int se_dev_set_emulate_write_cache(struct se_device *dev, int flag) 817{ 818 if (flag != 0 && flag != 1) { 819 pr_err("Illegal value %d\n", flag); 820 return -EINVAL; 821 } 822 if (flag && 823 dev->transport->get_write_cache) { 824 pr_err("emulate_write_cache not supported for this device\n"); 825 return -EINVAL; 826 } 827 if (dev->export_count) { 828 pr_err("emulate_write_cache cannot be changed with active" 829 " exports: %d\n", dev->export_count); 830 return -EINVAL; 831 } 832 dev->dev_attrib.emulate_write_cache = flag; 833 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 834 dev, dev->dev_attrib.emulate_write_cache); 835 return 0; 836} 837EXPORT_SYMBOL(se_dev_set_emulate_write_cache); 838 839int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag) 840{ 841 if ((flag != 0) && (flag != 1) && (flag != 2)) { 842 pr_err("Illegal value %d\n", flag); 843 return -EINVAL; 844 } 845 846 if (dev->export_count) { 847 pr_err("dev[%p]: Unable to change SE Device" 848 " UA_INTRLCK_CTRL while export_count is %d\n", 849 dev, dev->export_count); 850 return -EINVAL; 851 } 852 dev->dev_attrib.emulate_ua_intlck_ctrl = flag; 853 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 854 dev, dev->dev_attrib.emulate_ua_intlck_ctrl); 855 856 return 0; 857} 858EXPORT_SYMBOL(se_dev_set_emulate_ua_intlck_ctrl); 859 860int se_dev_set_emulate_tas(struct se_device *dev, int flag) 861{ 862 if ((flag != 0) && (flag != 1)) { 863 pr_err("Illegal value %d\n", flag); 864 return -EINVAL; 865 } 866 867 if (dev->export_count) { 868 pr_err("dev[%p]: Unable to change SE Device TAS while" 869 " export_count is %d\n", 870 dev, dev->export_count); 871 return -EINVAL; 872 } 873 dev->dev_attrib.emulate_tas = flag; 874 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 875 dev, (dev->dev_attrib.emulate_tas) ? "Enabled" : "Disabled"); 876 877 return 0; 878} 879EXPORT_SYMBOL(se_dev_set_emulate_tas); 880 881int se_dev_set_emulate_tpu(struct se_device *dev, int flag) 882{ 883 if ((flag != 0) && (flag != 1)) { 884 pr_err("Illegal value %d\n", flag); 885 return -EINVAL; 886 } 887 /* 888 * We expect this value to be non-zero when generic Block Layer 889 * Discard supported is detected iblock_create_virtdevice(). 890 */ 891 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) { 892 pr_err("Generic Block Discard not supported\n"); 893 return -ENOSYS; 894 } 895 896 dev->dev_attrib.emulate_tpu = flag; 897 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 898 dev, flag); 899 return 0; 900} 901EXPORT_SYMBOL(se_dev_set_emulate_tpu); 902 903int se_dev_set_emulate_tpws(struct se_device *dev, int flag) 904{ 905 if ((flag != 0) && (flag != 1)) { 906 pr_err("Illegal value %d\n", flag); 907 return -EINVAL; 908 } 909 /* 910 * We expect this value to be non-zero when generic Block Layer 911 * Discard supported is detected iblock_create_virtdevice(). 912 */ 913 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) { 914 pr_err("Generic Block Discard not supported\n"); 915 return -ENOSYS; 916 } 917 918 dev->dev_attrib.emulate_tpws = flag; 919 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 920 dev, flag); 921 return 0; 922} 923EXPORT_SYMBOL(se_dev_set_emulate_tpws); 924 925int se_dev_set_emulate_caw(struct se_device *dev, int flag) 926{ 927 if (flag != 0 && flag != 1) { 928 pr_err("Illegal value %d\n", flag); 929 return -EINVAL; 930 } 931 dev->dev_attrib.emulate_caw = flag; 932 pr_debug("dev[%p]: SE Device CompareAndWrite (AtomicTestandSet): %d\n", 933 dev, flag); 934 935 return 0; 936} 937EXPORT_SYMBOL(se_dev_set_emulate_caw); 938 939int se_dev_set_emulate_3pc(struct se_device *dev, int flag) 940{ 941 if (flag != 0 && flag != 1) { 942 pr_err("Illegal value %d\n", flag); 943 return -EINVAL; 944 } 945 dev->dev_attrib.emulate_3pc = flag; 946 pr_debug("dev[%p]: SE Device 3rd Party Copy (EXTENDED_COPY): %d\n", 947 dev, flag); 948 949 return 0; 950} 951EXPORT_SYMBOL(se_dev_set_emulate_3pc); 952 953int se_dev_set_pi_prot_type(struct se_device *dev, int flag) 954{ 955 int rc, old_prot = dev->dev_attrib.pi_prot_type; 956 957 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) { 958 pr_err("Illegal value %d for pi_prot_type\n", flag); 959 return -EINVAL; 960 } 961 if (flag == 2) { 962 pr_err("DIF TYPE2 protection currently not supported\n"); 963 return -ENOSYS; 964 } 965 if (dev->dev_attrib.hw_pi_prot_type) { 966 pr_warn("DIF protection enabled on underlying hardware," 967 " ignoring\n"); 968 return 0; 969 } 970 if (!dev->transport->init_prot || !dev->transport->free_prot) { 971 /* 0 is only allowed value for non-supporting backends */ 972 if (flag == 0) 973 return 0; 974 975 pr_err("DIF protection not supported by backend: %s\n", 976 dev->transport->name); 977 return -ENOSYS; 978 } 979 if (!(dev->dev_flags & DF_CONFIGURED)) { 980 pr_err("DIF protection requires device to be configured\n"); 981 return -ENODEV; 982 } 983 if (dev->export_count) { 984 pr_err("dev[%p]: Unable to change SE Device PROT type while" 985 " export_count is %d\n", dev, dev->export_count); 986 return -EINVAL; 987 } 988 989 dev->dev_attrib.pi_prot_type = flag; 990 991 if (flag && !old_prot) { 992 rc = dev->transport->init_prot(dev); 993 if (rc) { 994 dev->dev_attrib.pi_prot_type = old_prot; 995 return rc; 996 } 997 998 } else if (!flag && old_prot) { 999 dev->transport->free_prot(dev); 1000 } 1001 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag); 1002 1003 return 0; 1004} 1005EXPORT_SYMBOL(se_dev_set_pi_prot_type); 1006 1007int se_dev_set_pi_prot_format(struct se_device *dev, int flag) 1008{ 1009 int rc; 1010 1011 if (!flag) 1012 return 0; 1013 1014 if (flag != 1) { 1015 pr_err("Illegal value %d for pi_prot_format\n", flag); 1016 return -EINVAL; 1017 } 1018 if (!dev->transport->format_prot) { 1019 pr_err("DIF protection format not supported by backend %s\n", 1020 dev->transport->name); 1021 return -ENOSYS; 1022 } 1023 if (!(dev->dev_flags & DF_CONFIGURED)) { 1024 pr_err("DIF protection format requires device to be configured\n"); 1025 return -ENODEV; 1026 } 1027 if (dev->export_count) { 1028 pr_err("dev[%p]: Unable to format SE Device PROT type while" 1029 " export_count is %d\n", dev, dev->export_count); 1030 return -EINVAL; 1031 } 1032 1033 rc = dev->transport->format_prot(dev); 1034 if (rc) 1035 return rc; 1036 1037 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev); 1038 1039 return 0; 1040} 1041EXPORT_SYMBOL(se_dev_set_pi_prot_format); 1042 1043int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag) 1044{ 1045 if ((flag != 0) && (flag != 1)) { 1046 pr_err("Illegal value %d\n", flag); 1047 return -EINVAL; 1048 } 1049 dev->dev_attrib.enforce_pr_isids = flag; 1050 pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev, 1051 (dev->dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled"); 1052 return 0; 1053} 1054EXPORT_SYMBOL(se_dev_set_enforce_pr_isids); 1055 1056int se_dev_set_force_pr_aptpl(struct se_device *dev, int flag) 1057{ 1058 if ((flag != 0) && (flag != 1)) { 1059 printk(KERN_ERR "Illegal value %d\n", flag); 1060 return -EINVAL; 1061 } 1062 if (dev->export_count) { 1063 pr_err("dev[%p]: Unable to set force_pr_aptpl while" 1064 " export_count is %d\n", dev, dev->export_count); 1065 return -EINVAL; 1066 } 1067 1068 dev->dev_attrib.force_pr_aptpl = flag; 1069 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", dev, flag); 1070 return 0; 1071} 1072EXPORT_SYMBOL(se_dev_set_force_pr_aptpl); 1073 1074int se_dev_set_is_nonrot(struct se_device *dev, int flag) 1075{ 1076 if ((flag != 0) && (flag != 1)) { 1077 printk(KERN_ERR "Illegal value %d\n", flag); 1078 return -EINVAL; 1079 } 1080 dev->dev_attrib.is_nonrot = flag; 1081 pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n", 1082 dev, flag); 1083 return 0; 1084} 1085EXPORT_SYMBOL(se_dev_set_is_nonrot); 1086 1087int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag) 1088{ 1089 if (flag != 0) { 1090 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted" 1091 " reordering not implemented\n", dev); 1092 return -ENOSYS; 1093 } 1094 dev->dev_attrib.emulate_rest_reord = flag; 1095 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag); 1096 return 0; 1097} 1098EXPORT_SYMBOL(se_dev_set_emulate_rest_reord); 1099 1100/* 1101 * Note, this can only be called on unexported SE Device Object. 1102 */ 1103int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth) 1104{ 1105 if (dev->export_count) { 1106 pr_err("dev[%p]: Unable to change SE Device TCQ while" 1107 " export_count is %d\n", 1108 dev, dev->export_count); 1109 return -EINVAL; 1110 } 1111 if (!queue_depth) { 1112 pr_err("dev[%p]: Illegal ZERO value for queue" 1113 "_depth\n", dev); 1114 return -EINVAL; 1115 } 1116 1117 if (queue_depth > dev->dev_attrib.queue_depth) { 1118 if (queue_depth > dev->dev_attrib.hw_queue_depth) { 1119 pr_err("dev[%p]: Passed queue_depth:" 1120 " %u exceeds TCM/SE_Device MAX" 1121 " TCQ: %u\n", dev, queue_depth, 1122 dev->dev_attrib.hw_queue_depth); 1123 return -EINVAL; 1124 } 1125 } 1126 dev->dev_attrib.queue_depth = dev->queue_depth = queue_depth; 1127 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", 1128 dev, queue_depth); 1129 return 0; 1130} 1131EXPORT_SYMBOL(se_dev_set_queue_depth); 1132 1133int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors) 1134{ 1135 if (dev->export_count) { 1136 pr_err("dev[%p]: Unable to change SE Device" 1137 " optimal_sectors while export_count is %d\n", 1138 dev, dev->export_count); 1139 return -EINVAL; 1140 } 1141 if (optimal_sectors > dev->dev_attrib.hw_max_sectors) { 1142 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1143 " greater than hw_max_sectors: %u\n", dev, 1144 optimal_sectors, dev->dev_attrib.hw_max_sectors); 1145 return -EINVAL; 1146 } 1147 1148 dev->dev_attrib.optimal_sectors = optimal_sectors; 1149 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1150 dev, optimal_sectors); 1151 return 0; 1152} 1153EXPORT_SYMBOL(se_dev_set_optimal_sectors); 1154 1155int se_dev_set_block_size(struct se_device *dev, u32 block_size) 1156{ 1157 if (dev->export_count) { 1158 pr_err("dev[%p]: Unable to change SE Device block_size" 1159 " while export_count is %d\n", 1160 dev, dev->export_count); 1161 return -EINVAL; 1162 } 1163 1164 if ((block_size != 512) && 1165 (block_size != 1024) && 1166 (block_size != 2048) && 1167 (block_size != 4096)) { 1168 pr_err("dev[%p]: Illegal value for block_device: %u" 1169 " for SE device, must be 512, 1024, 2048 or 4096\n", 1170 dev, block_size); 1171 return -EINVAL; 1172 } 1173 1174 dev->dev_attrib.block_size = block_size; 1175 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1176 dev, block_size); 1177 1178 if (dev->dev_attrib.max_bytes_per_io) 1179 dev->dev_attrib.hw_max_sectors = 1180 dev->dev_attrib.max_bytes_per_io / block_size; 1181 1182 return 0; 1183} 1184EXPORT_SYMBOL(se_dev_set_block_size); 1185 1186struct se_lun *core_dev_add_lun( 1187 struct se_portal_group *tpg, 1188 struct se_device *dev, 1189 u32 unpacked_lun) 1190{ 1191 struct se_lun *lun; 1192 int rc; 1193 1194 lun = core_tpg_alloc_lun(tpg, unpacked_lun); 1195 if (IS_ERR(lun)) 1196 return lun; 1197 1198 rc = core_tpg_add_lun(tpg, lun, 1199 TRANSPORT_LUNFLAGS_READ_WRITE, dev); 1200 if (rc < 0) 1201 return ERR_PTR(rc); 1202 1203 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from" 1204 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1205 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, 1206 tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id); 1207 /* 1208 * Update LUN maps for dynamically added initiators when 1209 * generate_node_acl is enabled. 1210 */ 1211 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) { 1212 struct se_node_acl *acl; 1213 spin_lock_irq(&tpg->acl_node_lock); 1214 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { 1215 if (acl->dynamic_node_acl && 1216 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only || 1217 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) { 1218 spin_unlock_irq(&tpg->acl_node_lock); 1219 core_tpg_add_node_to_devs(acl, tpg); 1220 spin_lock_irq(&tpg->acl_node_lock); 1221 } 1222 } 1223 spin_unlock_irq(&tpg->acl_node_lock); 1224 } 1225 1226 return lun; 1227} 1228 1229/* core_dev_del_lun(): 1230 * 1231 * 1232 */ 1233void core_dev_del_lun( 1234 struct se_portal_group *tpg, 1235 struct se_lun *lun) 1236{ 1237 pr_debug("%s_TPG[%u]_LUN[%u] - Deactivating %s Logical Unit from" 1238 " device object\n", tpg->se_tpg_tfo->get_fabric_name(), 1239 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, 1240 tpg->se_tpg_tfo->get_fabric_name()); 1241 1242 core_tpg_remove_lun(tpg, lun); 1243} 1244 1245struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun) 1246{ 1247 struct se_lun *lun; 1248 1249 spin_lock(&tpg->tpg_lun_lock); 1250 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1251 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS" 1252 "_PER_TPG-1: %u for Target Portal Group: %hu\n", 1253 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1254 TRANSPORT_MAX_LUNS_PER_TPG-1, 1255 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1256 spin_unlock(&tpg->tpg_lun_lock); 1257 return NULL; 1258 } 1259 lun = tpg->tpg_lun_list[unpacked_lun]; 1260 1261 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) { 1262 pr_err("%s Logical Unit Number: %u is not free on" 1263 " Target Portal Group: %hu, ignoring request.\n", 1264 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1265 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1266 spin_unlock(&tpg->tpg_lun_lock); 1267 return NULL; 1268 } 1269 spin_unlock(&tpg->tpg_lun_lock); 1270 1271 return lun; 1272} 1273 1274/* core_dev_get_lun(): 1275 * 1276 * 1277 */ 1278static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun) 1279{ 1280 struct se_lun *lun; 1281 1282 spin_lock(&tpg->tpg_lun_lock); 1283 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1284 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER" 1285 "_TPG-1: %u for Target Portal Group: %hu\n", 1286 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1287 TRANSPORT_MAX_LUNS_PER_TPG-1, 1288 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1289 spin_unlock(&tpg->tpg_lun_lock); 1290 return NULL; 1291 } 1292 lun = tpg->tpg_lun_list[unpacked_lun]; 1293 1294 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { 1295 pr_err("%s Logical Unit Number: %u is not active on" 1296 " Target Portal Group: %hu, ignoring request.\n", 1297 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1298 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1299 spin_unlock(&tpg->tpg_lun_lock); 1300 return NULL; 1301 } 1302 spin_unlock(&tpg->tpg_lun_lock); 1303 1304 return lun; 1305} 1306 1307struct se_lun_acl *core_dev_init_initiator_node_lun_acl( 1308 struct se_portal_group *tpg, 1309 struct se_node_acl *nacl, 1310 u32 mapped_lun, 1311 int *ret) 1312{ 1313 struct se_lun_acl *lacl; 1314 1315 if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) { 1316 pr_err("%s InitiatorName exceeds maximum size.\n", 1317 tpg->se_tpg_tfo->get_fabric_name()); 1318 *ret = -EOVERFLOW; 1319 return NULL; 1320 } 1321 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL); 1322 if (!lacl) { 1323 pr_err("Unable to allocate memory for struct se_lun_acl.\n"); 1324 *ret = -ENOMEM; 1325 return NULL; 1326 } 1327 1328 INIT_LIST_HEAD(&lacl->lacl_list); 1329 lacl->mapped_lun = mapped_lun; 1330 lacl->se_lun_nacl = nacl; 1331 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", 1332 nacl->initiatorname); 1333 1334 return lacl; 1335} 1336 1337int core_dev_add_initiator_node_lun_acl( 1338 struct se_portal_group *tpg, 1339 struct se_lun_acl *lacl, 1340 u32 unpacked_lun, 1341 u32 lun_access) 1342{ 1343 struct se_lun *lun; 1344 struct se_node_acl *nacl; 1345 1346 lun = core_dev_get_lun(tpg, unpacked_lun); 1347 if (!lun) { 1348 pr_err("%s Logical Unit Number: %u is not active on" 1349 " Target Portal Group: %hu, ignoring request.\n", 1350 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1351 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1352 return -EINVAL; 1353 } 1354 1355 nacl = lacl->se_lun_nacl; 1356 if (!nacl) 1357 return -EINVAL; 1358 1359 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) && 1360 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE)) 1361 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; 1362 1363 lacl->se_lun = lun; 1364 1365 if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun, 1366 lun_access, nacl, tpg) < 0) 1367 return -EINVAL; 1368 1369 spin_lock(&lun->lun_acl_lock); 1370 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list); 1371 atomic_inc_mb(&lun->lun_acl_count); 1372 spin_unlock(&lun->lun_acl_lock); 1373 1374 pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for " 1375 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(), 1376 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun, 1377 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO", 1378 lacl->initiatorname); 1379 /* 1380 * Check to see if there are any existing persistent reservation APTPL 1381 * pre-registrations that need to be enabled for this LUN ACL.. 1382 */ 1383 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, nacl, 1384 lacl->mapped_lun); 1385 return 0; 1386} 1387 1388/* core_dev_del_initiator_node_lun_acl(): 1389 * 1390 * 1391 */ 1392int core_dev_del_initiator_node_lun_acl( 1393 struct se_portal_group *tpg, 1394 struct se_lun *lun, 1395 struct se_lun_acl *lacl) 1396{ 1397 struct se_node_acl *nacl; 1398 1399 nacl = lacl->se_lun_nacl; 1400 if (!nacl) 1401 return -EINVAL; 1402 1403 spin_lock(&lun->lun_acl_lock); 1404 list_del(&lacl->lacl_list); 1405 atomic_dec_mb(&lun->lun_acl_count); 1406 spin_unlock(&lun->lun_acl_lock); 1407 1408 core_disable_device_list_for_node(lun, NULL, lacl->mapped_lun, 1409 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg); 1410 1411 lacl->se_lun = NULL; 1412 1413 pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for" 1414 " InitiatorNode: %s Mapped LUN: %u\n", 1415 tpg->se_tpg_tfo->get_fabric_name(), 1416 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, 1417 lacl->initiatorname, lacl->mapped_lun); 1418 1419 return 0; 1420} 1421 1422void core_dev_free_initiator_node_lun_acl( 1423 struct se_portal_group *tpg, 1424 struct se_lun_acl *lacl) 1425{ 1426 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s" 1427 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1428 tpg->se_tpg_tfo->tpg_get_tag(tpg), 1429 tpg->se_tpg_tfo->get_fabric_name(), 1430 lacl->initiatorname, lacl->mapped_lun); 1431 1432 kfree(lacl); 1433} 1434 1435static void scsi_dump_inquiry(struct se_device *dev) 1436{ 1437 struct t10_wwn *wwn = &dev->t10_wwn; 1438 char buf[17]; 1439 int i, device_type; 1440 /* 1441 * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer 1442 */ 1443 for (i = 0; i < 8; i++) 1444 if (wwn->vendor[i] >= 0x20) 1445 buf[i] = wwn->vendor[i]; 1446 else 1447 buf[i] = ' '; 1448 buf[i] = '\0'; 1449 pr_debug(" Vendor: %s\n", buf); 1450 1451 for (i = 0; i < 16; i++) 1452 if (wwn->model[i] >= 0x20) 1453 buf[i] = wwn->model[i]; 1454 else 1455 buf[i] = ' '; 1456 buf[i] = '\0'; 1457 pr_debug(" Model: %s\n", buf); 1458 1459 for (i = 0; i < 4; i++) 1460 if (wwn->revision[i] >= 0x20) 1461 buf[i] = wwn->revision[i]; 1462 else 1463 buf[i] = ' '; 1464 buf[i] = '\0'; 1465 pr_debug(" Revision: %s\n", buf); 1466 1467 device_type = dev->transport->get_device_type(dev); 1468 pr_debug(" Type: %s ", scsi_device_type(device_type)); 1469} 1470 1471struct se_device *target_alloc_device(struct se_hba *hba, const char *name) 1472{ 1473 struct se_device *dev; 1474 struct se_lun *xcopy_lun; 1475 1476 dev = hba->transport->alloc_device(hba, name); 1477 if (!dev) 1478 return NULL; 1479 1480 dev->dev_link_magic = SE_DEV_LINK_MAGIC; 1481 dev->se_hba = hba; 1482 dev->transport = hba->transport; 1483 dev->prot_length = sizeof(struct se_dif_v1_tuple); 1484 1485 INIT_LIST_HEAD(&dev->dev_list); 1486 INIT_LIST_HEAD(&dev->dev_sep_list); 1487 INIT_LIST_HEAD(&dev->dev_tmr_list); 1488 INIT_LIST_HEAD(&dev->delayed_cmd_list); 1489 INIT_LIST_HEAD(&dev->state_list); 1490 INIT_LIST_HEAD(&dev->qf_cmd_list); 1491 INIT_LIST_HEAD(&dev->g_dev_node); 1492 spin_lock_init(&dev->execute_task_lock); 1493 spin_lock_init(&dev->delayed_cmd_lock); 1494 spin_lock_init(&dev->dev_reservation_lock); 1495 spin_lock_init(&dev->se_port_lock); 1496 spin_lock_init(&dev->se_tmr_lock); 1497 spin_lock_init(&dev->qf_cmd_lock); 1498 sema_init(&dev->caw_sem, 1); 1499 atomic_set(&dev->dev_ordered_id, 0); 1500 INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list); 1501 spin_lock_init(&dev->t10_wwn.t10_vpd_lock); 1502 INIT_LIST_HEAD(&dev->t10_pr.registration_list); 1503 INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list); 1504 spin_lock_init(&dev->t10_pr.registration_lock); 1505 spin_lock_init(&dev->t10_pr.aptpl_reg_lock); 1506 INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list); 1507 spin_lock_init(&dev->t10_alua.tg_pt_gps_lock); 1508 INIT_LIST_HEAD(&dev->t10_alua.lba_map_list); 1509 spin_lock_init(&dev->t10_alua.lba_map_lock); 1510 1511 dev->t10_wwn.t10_dev = dev; 1512 dev->t10_alua.t10_dev = dev; 1513 1514 dev->dev_attrib.da_dev = dev; 1515 dev->dev_attrib.emulate_model_alias = DA_EMULATE_MODEL_ALIAS; 1516 dev->dev_attrib.emulate_dpo = DA_EMULATE_DPO; 1517 dev->dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE; 1518 dev->dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ; 1519 dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE; 1520 dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL; 1521 dev->dev_attrib.emulate_tas = DA_EMULATE_TAS; 1522 dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU; 1523 dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS; 1524 dev->dev_attrib.emulate_caw = DA_EMULATE_CAW; 1525 dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC; 1526 dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE0_PROT; 1527 dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS; 1528 dev->dev_attrib.force_pr_aptpl = DA_FORCE_PR_APTPL; 1529 dev->dev_attrib.is_nonrot = DA_IS_NONROT; 1530 dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD; 1531 dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT; 1532 dev->dev_attrib.max_unmap_block_desc_count = 1533 DA_MAX_UNMAP_BLOCK_DESC_COUNT; 1534 dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT; 1535 dev->dev_attrib.unmap_granularity_alignment = 1536 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT; 1537 dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN; 1538 1539 xcopy_lun = &dev->xcopy_lun; 1540 xcopy_lun->lun_se_dev = dev; 1541 init_completion(&xcopy_lun->lun_shutdown_comp); 1542 INIT_LIST_HEAD(&xcopy_lun->lun_acl_list); 1543 spin_lock_init(&xcopy_lun->lun_acl_lock); 1544 spin_lock_init(&xcopy_lun->lun_sep_lock); 1545 init_completion(&xcopy_lun->lun_ref_comp); 1546 1547 return dev; 1548} 1549 1550int target_configure_device(struct se_device *dev) 1551{ 1552 struct se_hba *hba = dev->se_hba; 1553 int ret; 1554 1555 if (dev->dev_flags & DF_CONFIGURED) { 1556 pr_err("se_dev->se_dev_ptr already set for storage" 1557 " object\n"); 1558 return -EEXIST; 1559 } 1560 1561 ret = dev->transport->configure_device(dev); 1562 if (ret) 1563 goto out; 1564 /* 1565 * XXX: there is not much point to have two different values here.. 1566 */ 1567 dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size; 1568 dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth; 1569 1570 /* 1571 * Align max_hw_sectors down to PAGE_SIZE I/O transfers 1572 */ 1573 dev->dev_attrib.hw_max_sectors = 1574 se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors, 1575 dev->dev_attrib.hw_block_size); 1576 dev->dev_attrib.optimal_sectors = dev->dev_attrib.hw_max_sectors; 1577 1578 dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX); 1579 dev->creation_time = get_jiffies_64(); 1580 1581 ret = core_setup_alua(dev); 1582 if (ret) 1583 goto out; 1584 1585 /* 1586 * Startup the struct se_device processing thread 1587 */ 1588 dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1, 1589 dev->transport->name); 1590 if (!dev->tmr_wq) { 1591 pr_err("Unable to create tmr workqueue for %s\n", 1592 dev->transport->name); 1593 ret = -ENOMEM; 1594 goto out_free_alua; 1595 } 1596 1597 /* 1598 * Setup work_queue for QUEUE_FULL 1599 */ 1600 INIT_WORK(&dev->qf_work_queue, target_qf_do_work); 1601 1602 /* 1603 * Preload the initial INQUIRY const values if we are doing 1604 * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI 1605 * passthrough because this is being provided by the backend LLD. 1606 */ 1607 if (!(dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)) { 1608 strncpy(&dev->t10_wwn.vendor[0], "LIO-ORG", 8); 1609 strncpy(&dev->t10_wwn.model[0], 1610 dev->transport->inquiry_prod, 16); 1611 strncpy(&dev->t10_wwn.revision[0], 1612 dev->transport->inquiry_rev, 4); 1613 } 1614 1615 scsi_dump_inquiry(dev); 1616 1617 spin_lock(&hba->device_lock); 1618 hba->dev_count++; 1619 spin_unlock(&hba->device_lock); 1620 1621 mutex_lock(&g_device_mutex); 1622 list_add_tail(&dev->g_dev_node, &g_device_list); 1623 mutex_unlock(&g_device_mutex); 1624 1625 dev->dev_flags |= DF_CONFIGURED; 1626 1627 return 0; 1628 1629out_free_alua: 1630 core_alua_free_lu_gp_mem(dev); 1631out: 1632 se_release_vpd_for_dev(dev); 1633 return ret; 1634} 1635 1636void target_free_device(struct se_device *dev) 1637{ 1638 struct se_hba *hba = dev->se_hba; 1639 1640 WARN_ON(!list_empty(&dev->dev_sep_list)); 1641 1642 if (dev->dev_flags & DF_CONFIGURED) { 1643 destroy_workqueue(dev->tmr_wq); 1644 1645 mutex_lock(&g_device_mutex); 1646 list_del(&dev->g_dev_node); 1647 mutex_unlock(&g_device_mutex); 1648 1649 spin_lock(&hba->device_lock); 1650 hba->dev_count--; 1651 spin_unlock(&hba->device_lock); 1652 } 1653 1654 core_alua_free_lu_gp_mem(dev); 1655 core_alua_set_lba_map(dev, NULL, 0, 0); 1656 core_scsi3_free_all_registrations(dev); 1657 se_release_vpd_for_dev(dev); 1658 1659 if (dev->transport->free_prot) 1660 dev->transport->free_prot(dev); 1661 1662 dev->transport->free_device(dev); 1663} 1664 1665int core_dev_setup_virtual_lun0(void) 1666{ 1667 struct se_hba *hba; 1668 struct se_device *dev; 1669 char buf[] = "rd_pages=8,rd_nullio=1"; 1670 int ret; 1671 1672 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE); 1673 if (IS_ERR(hba)) 1674 return PTR_ERR(hba); 1675 1676 dev = target_alloc_device(hba, "virt_lun0"); 1677 if (!dev) { 1678 ret = -ENOMEM; 1679 goto out_free_hba; 1680 } 1681 1682 hba->transport->set_configfs_dev_params(dev, buf, sizeof(buf)); 1683 1684 ret = target_configure_device(dev); 1685 if (ret) 1686 goto out_free_se_dev; 1687 1688 lun0_hba = hba; 1689 g_lun0_dev = dev; 1690 return 0; 1691 1692out_free_se_dev: 1693 target_free_device(dev); 1694out_free_hba: 1695 core_delete_hba(hba); 1696 return ret; 1697} 1698 1699 1700void core_dev_release_virtual_lun0(void) 1701{ 1702 struct se_hba *hba = lun0_hba; 1703 1704 if (!hba) 1705 return; 1706 1707 if (g_lun0_dev) 1708 target_free_device(g_lun0_dev); 1709 core_delete_hba(hba); 1710} 1711 1712/* 1713 * Common CDB parsing for kernel and user passthrough. 1714 */ 1715sense_reason_t 1716passthrough_parse_cdb(struct se_cmd *cmd, 1717 sense_reason_t (*exec_cmd)(struct se_cmd *cmd)) 1718{ 1719 unsigned char *cdb = cmd->t_task_cdb; 1720 1721 /* 1722 * Clear a lun set in the cdb if the initiator talking to use spoke 1723 * and old standards version, as we can't assume the underlying device 1724 * won't choke up on it. 1725 */ 1726 switch (cdb[0]) { 1727 case READ_10: /* SBC - RDProtect */ 1728 case READ_12: /* SBC - RDProtect */ 1729 case READ_16: /* SBC - RDProtect */ 1730 case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */ 1731 case VERIFY: /* SBC - VRProtect */ 1732 case VERIFY_16: /* SBC - VRProtect */ 1733 case WRITE_VERIFY: /* SBC - VRProtect */ 1734 case WRITE_VERIFY_12: /* SBC - VRProtect */ 1735 case MAINTENANCE_IN: /* SPC - Parameter Data Format for SA RTPG */ 1736 break; 1737 default: 1738 cdb[1] &= 0x1f; /* clear logical unit number */ 1739 break; 1740 } 1741 1742 /* 1743 * For REPORT LUNS we always need to emulate the response, for everything 1744 * else, pass it up. 1745 */ 1746 if (cdb[0] == REPORT_LUNS) { 1747 cmd->execute_cmd = spc_emulate_report_luns; 1748 return TCM_NO_SENSE; 1749 } 1750 1751 /* Set DATA_CDB flag for ops that should have it */ 1752 switch (cdb[0]) { 1753 case READ_6: 1754 case READ_10: 1755 case READ_12: 1756 case READ_16: 1757 case WRITE_6: 1758 case WRITE_10: 1759 case WRITE_12: 1760 case WRITE_16: 1761 case WRITE_VERIFY: 1762 case WRITE_VERIFY_12: 1763 case 0x8e: /* WRITE_VERIFY_16 */ 1764 case COMPARE_AND_WRITE: 1765 case XDWRITEREAD_10: 1766 cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 1767 break; 1768 case VARIABLE_LENGTH_CMD: 1769 switch (get_unaligned_be16(&cdb[8])) { 1770 case READ_32: 1771 case WRITE_32: 1772 case 0x0c: /* WRITE_VERIFY_32 */ 1773 case XDWRITEREAD_32: 1774 cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 1775 break; 1776 } 1777 } 1778 1779 cmd->execute_cmd = exec_cmd; 1780 1781 return TCM_NO_SENSE; 1782} 1783EXPORT_SYMBOL(passthrough_parse_cdb); 1784