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 2003-2012 RisingTide Systems LLC. 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 static struct se_hba *lun0_hba; 51 /* not static, needed by tpg.c */ 52 struct se_device *g_lun0_dev; 53 54 sense_reason_t 55 transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun) 56 { 57 struct se_lun *se_lun = NULL; 58 struct se_session *se_sess = se_cmd->se_sess; 59 struct se_device *dev; 60 unsigned long flags; 61 62 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) 63 return TCM_NON_EXISTENT_LUN; 64 65 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags); 66 se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun]; 67 if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 68 struct se_dev_entry *deve = se_cmd->se_deve; 69 70 deve->total_cmds++; 71 deve->total_bytes += se_cmd->data_length; 72 73 if ((se_cmd->data_direction == DMA_TO_DEVICE) && 74 (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) { 75 pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN" 76 " Access for 0x%08x\n", 77 se_cmd->se_tfo->get_fabric_name(), 78 unpacked_lun); 79 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); 80 return TCM_WRITE_PROTECTED; 81 } 82 83 if (se_cmd->data_direction == DMA_TO_DEVICE) 84 deve->write_bytes += se_cmd->data_length; 85 else if (se_cmd->data_direction == DMA_FROM_DEVICE) 86 deve->read_bytes += se_cmd->data_length; 87 88 deve->deve_cmds++; 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 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); 97 98 if (!se_lun) { 99 /* 100 * Use the se_portal_group->tpg_virt_lun0 to allow for 101 * REPORT_LUNS, et al to be returned when no active 102 * MappedLUN=0 exists for this Initiator Port. 103 */ 104 if (unpacked_lun != 0) { 105 pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" 106 " Access for 0x%08x\n", 107 se_cmd->se_tfo->get_fabric_name(), 108 unpacked_lun); 109 return TCM_NON_EXISTENT_LUN; 110 } 111 /* 112 * Force WRITE PROTECT for virtual LUN 0 113 */ 114 if ((se_cmd->data_direction != DMA_FROM_DEVICE) && 115 (se_cmd->data_direction != DMA_NONE)) 116 return TCM_WRITE_PROTECTED; 117 118 se_lun = &se_sess->se_tpg->tpg_virt_lun0; 119 se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0; 120 se_cmd->orig_fe_lun = 0; 121 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; 122 } 123 124 /* Directly associate cmd with se_dev */ 125 se_cmd->se_dev = se_lun->lun_se_dev; 126 127 /* TODO: get rid of this and use atomics for stats */ 128 dev = se_lun->lun_se_dev; 129 spin_lock_irqsave(&dev->stats_lock, flags); 130 dev->num_cmds++; 131 if (se_cmd->data_direction == DMA_TO_DEVICE) 132 dev->write_bytes += se_cmd->data_length; 133 else if (se_cmd->data_direction == DMA_FROM_DEVICE) 134 dev->read_bytes += se_cmd->data_length; 135 spin_unlock_irqrestore(&dev->stats_lock, flags); 136 137 spin_lock_irqsave(&se_lun->lun_cmd_lock, flags); 138 list_add_tail(&se_cmd->se_lun_node, &se_lun->lun_cmd_list); 139 spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags); 140 141 return 0; 142 } 143 EXPORT_SYMBOL(transport_lookup_cmd_lun); 144 145 int 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 } 187 EXPORT_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 */ 194 struct 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(&deve->pr_ref_count); 229 smp_mb__after_atomic_inc(); 230 spin_unlock_irq(&nacl->device_list_lock); 231 232 return deve; 233 } 234 spin_unlock_irq(&nacl->device_list_lock); 235 236 return NULL; 237 } 238 239 int core_free_device_list_for_node( 240 struct se_node_acl *nacl, 241 struct se_portal_group *tpg) 242 { 243 struct se_dev_entry *deve; 244 struct se_lun *lun; 245 u32 i; 246 247 if (!nacl->device_list) 248 return 0; 249 250 spin_lock_irq(&nacl->device_list_lock); 251 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 252 deve = nacl->device_list[i]; 253 254 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 255 continue; 256 257 if (!deve->se_lun) { 258 pr_err("%s device entries device pointer is" 259 " NULL, but Initiator has access.\n", 260 tpg->se_tpg_tfo->get_fabric_name()); 261 continue; 262 } 263 lun = deve->se_lun; 264 265 spin_unlock_irq(&nacl->device_list_lock); 266 core_disable_device_list_for_node(lun, NULL, deve->mapped_lun, 267 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg); 268 spin_lock_irq(&nacl->device_list_lock); 269 } 270 spin_unlock_irq(&nacl->device_list_lock); 271 272 array_free(nacl->device_list, TRANSPORT_MAX_LUNS_PER_TPG); 273 nacl->device_list = NULL; 274 275 return 0; 276 } 277 278 void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd) 279 { 280 struct se_dev_entry *deve; 281 unsigned long flags; 282 283 spin_lock_irqsave(&se_nacl->device_list_lock, flags); 284 deve = se_nacl->device_list[se_cmd->orig_fe_lun]; 285 deve->deve_cmds--; 286 spin_unlock_irqrestore(&se_nacl->device_list_lock, flags); 287 } 288 289 void core_update_device_list_access( 290 u32 mapped_lun, 291 u32 lun_access, 292 struct se_node_acl *nacl) 293 { 294 struct se_dev_entry *deve; 295 296 spin_lock_irq(&nacl->device_list_lock); 297 deve = nacl->device_list[mapped_lun]; 298 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 299 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 300 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 301 } else { 302 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 303 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 304 } 305 spin_unlock_irq(&nacl->device_list_lock); 306 } 307 308 /* core_enable_device_list_for_node(): 309 * 310 * 311 */ 312 int core_enable_device_list_for_node( 313 struct se_lun *lun, 314 struct se_lun_acl *lun_acl, 315 u32 mapped_lun, 316 u32 lun_access, 317 struct se_node_acl *nacl, 318 struct se_portal_group *tpg) 319 { 320 struct se_port *port = lun->lun_sep; 321 struct se_dev_entry *deve; 322 323 spin_lock_irq(&nacl->device_list_lock); 324 325 deve = nacl->device_list[mapped_lun]; 326 327 /* 328 * Check if the call is handling demo mode -> explict LUN ACL 329 * transition. This transition must be for the same struct se_lun 330 * + mapped_lun that was setup in demo mode.. 331 */ 332 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 333 if (deve->se_lun_acl != NULL) { 334 pr_err("struct se_dev_entry->se_lun_acl" 335 " already set for demo mode -> explict" 336 " LUN ACL transition\n"); 337 spin_unlock_irq(&nacl->device_list_lock); 338 return -EINVAL; 339 } 340 if (deve->se_lun != lun) { 341 pr_err("struct se_dev_entry->se_lun does" 342 " match passed struct se_lun for demo mode" 343 " -> explict LUN ACL transition\n"); 344 spin_unlock_irq(&nacl->device_list_lock); 345 return -EINVAL; 346 } 347 deve->se_lun_acl = lun_acl; 348 349 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 350 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 351 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 352 } else { 353 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 354 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 355 } 356 357 spin_unlock_irq(&nacl->device_list_lock); 358 return 0; 359 } 360 361 deve->se_lun = lun; 362 deve->se_lun_acl = lun_acl; 363 deve->mapped_lun = mapped_lun; 364 deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS; 365 366 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 367 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 368 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 369 } else { 370 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 371 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 372 } 373 374 deve->creation_time = get_jiffies_64(); 375 deve->attach_count++; 376 spin_unlock_irq(&nacl->device_list_lock); 377 378 spin_lock_bh(&port->sep_alua_lock); 379 list_add_tail(&deve->alua_port_list, &port->sep_alua_list); 380 spin_unlock_bh(&port->sep_alua_lock); 381 382 return 0; 383 } 384 385 /* core_disable_device_list_for_node(): 386 * 387 * 388 */ 389 int core_disable_device_list_for_node( 390 struct se_lun *lun, 391 struct se_lun_acl *lun_acl, 392 u32 mapped_lun, 393 u32 lun_access, 394 struct se_node_acl *nacl, 395 struct se_portal_group *tpg) 396 { 397 struct se_port *port = lun->lun_sep; 398 struct se_dev_entry *deve = nacl->device_list[mapped_lun]; 399 400 /* 401 * If the MappedLUN entry is being disabled, the entry in 402 * port->sep_alua_list must be removed now before clearing the 403 * struct se_dev_entry pointers below as logic in 404 * core_alua_do_transition_tg_pt() depends on these being present. 405 * 406 * deve->se_lun_acl will be NULL for demo-mode created LUNs 407 * that have not been explicitly converted to MappedLUNs -> 408 * struct se_lun_acl, but we remove deve->alua_port_list from 409 * port->sep_alua_list. This also means that active UAs and 410 * NodeACL context specific PR metadata for demo-mode 411 * MappedLUN *deve will be released below.. 412 */ 413 spin_lock_bh(&port->sep_alua_lock); 414 list_del(&deve->alua_port_list); 415 spin_unlock_bh(&port->sep_alua_lock); 416 /* 417 * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE 418 * PR operation to complete. 419 */ 420 while (atomic_read(&deve->pr_ref_count) != 0) 421 cpu_relax(); 422 423 spin_lock_irq(&nacl->device_list_lock); 424 /* 425 * Disable struct se_dev_entry LUN ACL mapping 426 */ 427 core_scsi3_ua_release_all(deve); 428 deve->se_lun = NULL; 429 deve->se_lun_acl = NULL; 430 deve->lun_flags = 0; 431 deve->creation_time = 0; 432 deve->attach_count--; 433 spin_unlock_irq(&nacl->device_list_lock); 434 435 core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl); 436 return 0; 437 } 438 439 /* core_clear_lun_from_tpg(): 440 * 441 * 442 */ 443 void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg) 444 { 445 struct se_node_acl *nacl; 446 struct se_dev_entry *deve; 447 u32 i; 448 449 spin_lock_irq(&tpg->acl_node_lock); 450 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) { 451 spin_unlock_irq(&tpg->acl_node_lock); 452 453 spin_lock_irq(&nacl->device_list_lock); 454 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 455 deve = nacl->device_list[i]; 456 if (lun != deve->se_lun) 457 continue; 458 spin_unlock_irq(&nacl->device_list_lock); 459 460 core_disable_device_list_for_node(lun, NULL, 461 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS, 462 nacl, tpg); 463 464 spin_lock_irq(&nacl->device_list_lock); 465 } 466 spin_unlock_irq(&nacl->device_list_lock); 467 468 spin_lock_irq(&tpg->acl_node_lock); 469 } 470 spin_unlock_irq(&tpg->acl_node_lock); 471 } 472 473 static struct se_port *core_alloc_port(struct se_device *dev) 474 { 475 struct se_port *port, *port_tmp; 476 477 port = kzalloc(sizeof(struct se_port), GFP_KERNEL); 478 if (!port) { 479 pr_err("Unable to allocate struct se_port\n"); 480 return ERR_PTR(-ENOMEM); 481 } 482 INIT_LIST_HEAD(&port->sep_alua_list); 483 INIT_LIST_HEAD(&port->sep_list); 484 atomic_set(&port->sep_tg_pt_secondary_offline, 0); 485 spin_lock_init(&port->sep_alua_lock); 486 mutex_init(&port->sep_tg_pt_md_mutex); 487 488 spin_lock(&dev->se_port_lock); 489 if (dev->dev_port_count == 0x0000ffff) { 490 pr_warn("Reached dev->dev_port_count ==" 491 " 0x0000ffff\n"); 492 spin_unlock(&dev->se_port_lock); 493 return ERR_PTR(-ENOSPC); 494 } 495 again: 496 /* 497 * Allocate the next RELATIVE TARGET PORT IDENTIFIER for this struct se_device 498 * Here is the table from spc4r17 section 7.7.3.8. 499 * 500 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field 501 * 502 * Code Description 503 * 0h Reserved 504 * 1h Relative port 1, historically known as port A 505 * 2h Relative port 2, historically known as port B 506 * 3h to FFFFh Relative port 3 through 65 535 507 */ 508 port->sep_rtpi = dev->dev_rpti_counter++; 509 if (!port->sep_rtpi) 510 goto again; 511 512 list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) { 513 /* 514 * Make sure RELATIVE TARGET PORT IDENTIFIER is unique 515 * for 16-bit wrap.. 516 */ 517 if (port->sep_rtpi == port_tmp->sep_rtpi) 518 goto again; 519 } 520 spin_unlock(&dev->se_port_lock); 521 522 return port; 523 } 524 525 static void core_export_port( 526 struct se_device *dev, 527 struct se_portal_group *tpg, 528 struct se_port *port, 529 struct se_lun *lun) 530 { 531 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL; 532 533 spin_lock(&dev->se_port_lock); 534 spin_lock(&lun->lun_sep_lock); 535 port->sep_tpg = tpg; 536 port->sep_lun = lun; 537 lun->lun_sep = port; 538 spin_unlock(&lun->lun_sep_lock); 539 540 list_add_tail(&port->sep_list, &dev->dev_sep_list); 541 spin_unlock(&dev->se_port_lock); 542 543 if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV && 544 !(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) { 545 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port); 546 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) { 547 pr_err("Unable to allocate t10_alua_tg_pt" 548 "_gp_member_t\n"); 549 return; 550 } 551 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 552 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem, 553 dev->t10_alua.default_tg_pt_gp); 554 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 555 pr_debug("%s/%s: Adding to default ALUA Target Port" 556 " Group: alua/default_tg_pt_gp\n", 557 dev->transport->name, tpg->se_tpg_tfo->get_fabric_name()); 558 } 559 560 dev->dev_port_count++; 561 port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFIER */ 562 } 563 564 /* 565 * Called with struct se_device->se_port_lock spinlock held. 566 */ 567 static void core_release_port(struct se_device *dev, struct se_port *port) 568 __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock) 569 { 570 /* 571 * Wait for any port reference for PR ALL_TG_PT=1 operation 572 * to complete in __core_scsi3_alloc_registration() 573 */ 574 spin_unlock(&dev->se_port_lock); 575 if (atomic_read(&port->sep_tg_pt_ref_cnt)) 576 cpu_relax(); 577 spin_lock(&dev->se_port_lock); 578 579 core_alua_free_tg_pt_gp_mem(port); 580 581 list_del(&port->sep_list); 582 dev->dev_port_count--; 583 kfree(port); 584 } 585 586 int core_dev_export( 587 struct se_device *dev, 588 struct se_portal_group *tpg, 589 struct se_lun *lun) 590 { 591 struct se_hba *hba = dev->se_hba; 592 struct se_port *port; 593 594 port = core_alloc_port(dev); 595 if (IS_ERR(port)) 596 return PTR_ERR(port); 597 598 lun->lun_se_dev = dev; 599 600 spin_lock(&hba->device_lock); 601 dev->export_count++; 602 spin_unlock(&hba->device_lock); 603 604 core_export_port(dev, tpg, port, lun); 605 return 0; 606 } 607 608 void core_dev_unexport( 609 struct se_device *dev, 610 struct se_portal_group *tpg, 611 struct se_lun *lun) 612 { 613 struct se_hba *hba = dev->se_hba; 614 struct se_port *port = lun->lun_sep; 615 616 spin_lock(&lun->lun_sep_lock); 617 if (lun->lun_se_dev == NULL) { 618 spin_unlock(&lun->lun_sep_lock); 619 return; 620 } 621 spin_unlock(&lun->lun_sep_lock); 622 623 spin_lock(&dev->se_port_lock); 624 core_release_port(dev, port); 625 spin_unlock(&dev->se_port_lock); 626 627 spin_lock(&hba->device_lock); 628 dev->export_count--; 629 spin_unlock(&hba->device_lock); 630 631 lun->lun_se_dev = NULL; 632 } 633 634 static void se_release_vpd_for_dev(struct se_device *dev) 635 { 636 struct t10_vpd *vpd, *vpd_tmp; 637 638 spin_lock(&dev->t10_wwn.t10_vpd_lock); 639 list_for_each_entry_safe(vpd, vpd_tmp, 640 &dev->t10_wwn.t10_vpd_list, vpd_list) { 641 list_del(&vpd->vpd_list); 642 kfree(vpd); 643 } 644 spin_unlock(&dev->t10_wwn.t10_vpd_lock); 645 } 646 647 static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size) 648 { 649 u32 aligned_max_sectors; 650 u32 alignment; 651 /* 652 * Limit max_sectors to a PAGE_SIZE aligned value for modern 653 * transport_allocate_data_tasks() operation. 654 */ 655 alignment = max(1ul, PAGE_SIZE / block_size); 656 aligned_max_sectors = rounddown(max_sectors, alignment); 657 658 if (max_sectors != aligned_max_sectors) 659 pr_info("Rounding down aligned max_sectors from %u to %u\n", 660 max_sectors, aligned_max_sectors); 661 662 return aligned_max_sectors; 663 } 664 665 int se_dev_set_max_unmap_lba_count( 666 struct se_device *dev, 667 u32 max_unmap_lba_count) 668 { 669 dev->dev_attrib.max_unmap_lba_count = max_unmap_lba_count; 670 pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n", 671 dev, dev->dev_attrib.max_unmap_lba_count); 672 return 0; 673 } 674 675 int se_dev_set_max_unmap_block_desc_count( 676 struct se_device *dev, 677 u32 max_unmap_block_desc_count) 678 { 679 dev->dev_attrib.max_unmap_block_desc_count = 680 max_unmap_block_desc_count; 681 pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n", 682 dev, dev->dev_attrib.max_unmap_block_desc_count); 683 return 0; 684 } 685 686 int se_dev_set_unmap_granularity( 687 struct se_device *dev, 688 u32 unmap_granularity) 689 { 690 dev->dev_attrib.unmap_granularity = unmap_granularity; 691 pr_debug("dev[%p]: Set unmap_granularity: %u\n", 692 dev, dev->dev_attrib.unmap_granularity); 693 return 0; 694 } 695 696 int se_dev_set_unmap_granularity_alignment( 697 struct se_device *dev, 698 u32 unmap_granularity_alignment) 699 { 700 dev->dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment; 701 pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n", 702 dev, dev->dev_attrib.unmap_granularity_alignment); 703 return 0; 704 } 705 706 int se_dev_set_max_write_same_len( 707 struct se_device *dev, 708 u32 max_write_same_len) 709 { 710 dev->dev_attrib.max_write_same_len = max_write_same_len; 711 pr_debug("dev[%p]: Set max_write_same_len: %u\n", 712 dev, dev->dev_attrib.max_write_same_len); 713 return 0; 714 } 715 716 int se_dev_set_emulate_dpo(struct se_device *dev, int flag) 717 { 718 if (flag != 0 && flag != 1) { 719 pr_err("Illegal value %d\n", flag); 720 return -EINVAL; 721 } 722 723 if (flag) { 724 pr_err("dpo_emulated not supported\n"); 725 return -EINVAL; 726 } 727 728 return 0; 729 } 730 731 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag) 732 { 733 if (flag != 0 && flag != 1) { 734 pr_err("Illegal value %d\n", flag); 735 return -EINVAL; 736 } 737 738 if (flag && 739 dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 740 pr_err("emulate_fua_write not supported for pSCSI\n"); 741 return -EINVAL; 742 } 743 dev->dev_attrib.emulate_fua_write = flag; 744 pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n", 745 dev, dev->dev_attrib.emulate_fua_write); 746 return 0; 747 } 748 749 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag) 750 { 751 if (flag != 0 && flag != 1) { 752 pr_err("Illegal value %d\n", flag); 753 return -EINVAL; 754 } 755 756 if (flag) { 757 pr_err("ua read emulated not supported\n"); 758 return -EINVAL; 759 } 760 761 return 0; 762 } 763 764 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag) 765 { 766 if (flag != 0 && flag != 1) { 767 pr_err("Illegal value %d\n", flag); 768 return -EINVAL; 769 } 770 if (flag && 771 dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 772 pr_err("emulate_write_cache not supported for pSCSI\n"); 773 return -EINVAL; 774 } 775 dev->dev_attrib.emulate_write_cache = flag; 776 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 777 dev, dev->dev_attrib.emulate_write_cache); 778 return 0; 779 } 780 781 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag) 782 { 783 if ((flag != 0) && (flag != 1) && (flag != 2)) { 784 pr_err("Illegal value %d\n", flag); 785 return -EINVAL; 786 } 787 788 if (dev->export_count) { 789 pr_err("dev[%p]: Unable to change SE Device" 790 " UA_INTRLCK_CTRL while export_count is %d\n", 791 dev, dev->export_count); 792 return -EINVAL; 793 } 794 dev->dev_attrib.emulate_ua_intlck_ctrl = flag; 795 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 796 dev, dev->dev_attrib.emulate_ua_intlck_ctrl); 797 798 return 0; 799 } 800 801 int se_dev_set_emulate_tas(struct se_device *dev, int flag) 802 { 803 if ((flag != 0) && (flag != 1)) { 804 pr_err("Illegal value %d\n", flag); 805 return -EINVAL; 806 } 807 808 if (dev->export_count) { 809 pr_err("dev[%p]: Unable to change SE Device TAS while" 810 " export_count is %d\n", 811 dev, dev->export_count); 812 return -EINVAL; 813 } 814 dev->dev_attrib.emulate_tas = flag; 815 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 816 dev, (dev->dev_attrib.emulate_tas) ? "Enabled" : "Disabled"); 817 818 return 0; 819 } 820 821 int se_dev_set_emulate_tpu(struct se_device *dev, int flag) 822 { 823 if ((flag != 0) && (flag != 1)) { 824 pr_err("Illegal value %d\n", flag); 825 return -EINVAL; 826 } 827 /* 828 * We expect this value to be non-zero when generic Block Layer 829 * Discard supported is detected iblock_create_virtdevice(). 830 */ 831 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) { 832 pr_err("Generic Block Discard not supported\n"); 833 return -ENOSYS; 834 } 835 836 dev->dev_attrib.emulate_tpu = flag; 837 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 838 dev, flag); 839 return 0; 840 } 841 842 int se_dev_set_emulate_tpws(struct se_device *dev, int flag) 843 { 844 if ((flag != 0) && (flag != 1)) { 845 pr_err("Illegal value %d\n", flag); 846 return -EINVAL; 847 } 848 /* 849 * We expect this value to be non-zero when generic Block Layer 850 * Discard supported is detected iblock_create_virtdevice(). 851 */ 852 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) { 853 pr_err("Generic Block Discard not supported\n"); 854 return -ENOSYS; 855 } 856 857 dev->dev_attrib.emulate_tpws = flag; 858 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 859 dev, flag); 860 return 0; 861 } 862 863 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag) 864 { 865 if ((flag != 0) && (flag != 1)) { 866 pr_err("Illegal value %d\n", flag); 867 return -EINVAL; 868 } 869 dev->dev_attrib.enforce_pr_isids = flag; 870 pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev, 871 (dev->dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled"); 872 return 0; 873 } 874 875 int se_dev_set_is_nonrot(struct se_device *dev, int flag) 876 { 877 if ((flag != 0) && (flag != 1)) { 878 printk(KERN_ERR "Illegal value %d\n", flag); 879 return -EINVAL; 880 } 881 dev->dev_attrib.is_nonrot = flag; 882 pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n", 883 dev, flag); 884 return 0; 885 } 886 887 int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag) 888 { 889 if (flag != 0) { 890 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted" 891 " reordering not implemented\n", dev); 892 return -ENOSYS; 893 } 894 dev->dev_attrib.emulate_rest_reord = flag; 895 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag); 896 return 0; 897 } 898 899 /* 900 * Note, this can only be called on unexported SE Device Object. 901 */ 902 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth) 903 { 904 if (dev->export_count) { 905 pr_err("dev[%p]: Unable to change SE Device TCQ while" 906 " export_count is %d\n", 907 dev, dev->export_count); 908 return -EINVAL; 909 } 910 if (!queue_depth) { 911 pr_err("dev[%p]: Illegal ZERO value for queue" 912 "_depth\n", dev); 913 return -EINVAL; 914 } 915 916 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 917 if (queue_depth > dev->dev_attrib.hw_queue_depth) { 918 pr_err("dev[%p]: Passed queue_depth: %u" 919 " exceeds TCM/SE_Device TCQ: %u\n", 920 dev, queue_depth, 921 dev->dev_attrib.hw_queue_depth); 922 return -EINVAL; 923 } 924 } else { 925 if (queue_depth > dev->dev_attrib.queue_depth) { 926 if (queue_depth > dev->dev_attrib.hw_queue_depth) { 927 pr_err("dev[%p]: Passed queue_depth:" 928 " %u exceeds TCM/SE_Device MAX" 929 " TCQ: %u\n", dev, queue_depth, 930 dev->dev_attrib.hw_queue_depth); 931 return -EINVAL; 932 } 933 } 934 } 935 936 dev->dev_attrib.queue_depth = dev->queue_depth = queue_depth; 937 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", 938 dev, queue_depth); 939 return 0; 940 } 941 942 int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors) 943 { 944 if (dev->export_count) { 945 pr_err("dev[%p]: Unable to change SE Device" 946 " fabric_max_sectors while export_count is %d\n", 947 dev, dev->export_count); 948 return -EINVAL; 949 } 950 if (!fabric_max_sectors) { 951 pr_err("dev[%p]: Illegal ZERO value for" 952 " fabric_max_sectors\n", dev); 953 return -EINVAL; 954 } 955 if (fabric_max_sectors < DA_STATUS_MAX_SECTORS_MIN) { 956 pr_err("dev[%p]: Passed fabric_max_sectors: %u less than" 957 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, fabric_max_sectors, 958 DA_STATUS_MAX_SECTORS_MIN); 959 return -EINVAL; 960 } 961 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 962 if (fabric_max_sectors > dev->dev_attrib.hw_max_sectors) { 963 pr_err("dev[%p]: Passed fabric_max_sectors: %u" 964 " greater than TCM/SE_Device max_sectors:" 965 " %u\n", dev, fabric_max_sectors, 966 dev->dev_attrib.hw_max_sectors); 967 return -EINVAL; 968 } 969 } else { 970 if (fabric_max_sectors > DA_STATUS_MAX_SECTORS_MAX) { 971 pr_err("dev[%p]: Passed fabric_max_sectors: %u" 972 " greater than DA_STATUS_MAX_SECTORS_MAX:" 973 " %u\n", dev, fabric_max_sectors, 974 DA_STATUS_MAX_SECTORS_MAX); 975 return -EINVAL; 976 } 977 } 978 /* 979 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks() 980 */ 981 fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors, 982 dev->dev_attrib.block_size); 983 984 dev->dev_attrib.fabric_max_sectors = fabric_max_sectors; 985 pr_debug("dev[%p]: SE Device max_sectors changed to %u\n", 986 dev, fabric_max_sectors); 987 return 0; 988 } 989 990 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors) 991 { 992 if (dev->export_count) { 993 pr_err("dev[%p]: Unable to change SE Device" 994 " optimal_sectors while export_count is %d\n", 995 dev, dev->export_count); 996 return -EINVAL; 997 } 998 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 999 pr_err("dev[%p]: Passed optimal_sectors cannot be" 1000 " changed for TCM/pSCSI\n", dev); 1001 return -EINVAL; 1002 } 1003 if (optimal_sectors > dev->dev_attrib.fabric_max_sectors) { 1004 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1005 " greater than fabric_max_sectors: %u\n", dev, 1006 optimal_sectors, dev->dev_attrib.fabric_max_sectors); 1007 return -EINVAL; 1008 } 1009 1010 dev->dev_attrib.optimal_sectors = optimal_sectors; 1011 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1012 dev, optimal_sectors); 1013 return 0; 1014 } 1015 1016 int se_dev_set_block_size(struct se_device *dev, u32 block_size) 1017 { 1018 if (dev->export_count) { 1019 pr_err("dev[%p]: Unable to change SE Device block_size" 1020 " while export_count is %d\n", 1021 dev, dev->export_count); 1022 return -EINVAL; 1023 } 1024 1025 if ((block_size != 512) && 1026 (block_size != 1024) && 1027 (block_size != 2048) && 1028 (block_size != 4096)) { 1029 pr_err("dev[%p]: Illegal value for block_device: %u" 1030 " for SE device, must be 512, 1024, 2048 or 4096\n", 1031 dev, block_size); 1032 return -EINVAL; 1033 } 1034 1035 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1036 pr_err("dev[%p]: Not allowed to change block_size for" 1037 " Physical Device, use for Linux/SCSI to change" 1038 " block_size for underlying hardware\n", dev); 1039 return -EINVAL; 1040 } 1041 1042 dev->dev_attrib.block_size = block_size; 1043 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1044 dev, block_size); 1045 return 0; 1046 } 1047 1048 struct se_lun *core_dev_add_lun( 1049 struct se_portal_group *tpg, 1050 struct se_device *dev, 1051 u32 lun) 1052 { 1053 struct se_lun *lun_p; 1054 int rc; 1055 1056 lun_p = core_tpg_pre_addlun(tpg, lun); 1057 if (IS_ERR(lun_p)) 1058 return lun_p; 1059 1060 rc = core_tpg_post_addlun(tpg, lun_p, 1061 TRANSPORT_LUNFLAGS_READ_WRITE, dev); 1062 if (rc < 0) 1063 return ERR_PTR(rc); 1064 1065 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from" 1066 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1067 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun_p->unpacked_lun, 1068 tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id); 1069 /* 1070 * Update LUN maps for dynamically added initiators when 1071 * generate_node_acl is enabled. 1072 */ 1073 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) { 1074 struct se_node_acl *acl; 1075 spin_lock_irq(&tpg->acl_node_lock); 1076 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { 1077 if (acl->dynamic_node_acl && 1078 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only || 1079 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) { 1080 spin_unlock_irq(&tpg->acl_node_lock); 1081 core_tpg_add_node_to_devs(acl, tpg); 1082 spin_lock_irq(&tpg->acl_node_lock); 1083 } 1084 } 1085 spin_unlock_irq(&tpg->acl_node_lock); 1086 } 1087 1088 return lun_p; 1089 } 1090 1091 /* core_dev_del_lun(): 1092 * 1093 * 1094 */ 1095 int core_dev_del_lun( 1096 struct se_portal_group *tpg, 1097 u32 unpacked_lun) 1098 { 1099 struct se_lun *lun; 1100 1101 lun = core_tpg_pre_dellun(tpg, unpacked_lun); 1102 if (IS_ERR(lun)) 1103 return PTR_ERR(lun); 1104 1105 core_tpg_post_dellun(tpg, lun); 1106 1107 pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from" 1108 " device object\n", tpg->se_tpg_tfo->get_fabric_name(), 1109 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, 1110 tpg->se_tpg_tfo->get_fabric_name()); 1111 1112 return 0; 1113 } 1114 1115 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun) 1116 { 1117 struct se_lun *lun; 1118 1119 spin_lock(&tpg->tpg_lun_lock); 1120 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1121 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS" 1122 "_PER_TPG-1: %u for Target Portal Group: %hu\n", 1123 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1124 TRANSPORT_MAX_LUNS_PER_TPG-1, 1125 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1126 spin_unlock(&tpg->tpg_lun_lock); 1127 return NULL; 1128 } 1129 lun = tpg->tpg_lun_list[unpacked_lun]; 1130 1131 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) { 1132 pr_err("%s Logical Unit Number: %u is not free on" 1133 " Target Portal Group: %hu, ignoring request.\n", 1134 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1135 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1136 spin_unlock(&tpg->tpg_lun_lock); 1137 return NULL; 1138 } 1139 spin_unlock(&tpg->tpg_lun_lock); 1140 1141 return lun; 1142 } 1143 1144 /* core_dev_get_lun(): 1145 * 1146 * 1147 */ 1148 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun) 1149 { 1150 struct se_lun *lun; 1151 1152 spin_lock(&tpg->tpg_lun_lock); 1153 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1154 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER" 1155 "_TPG-1: %u for Target Portal Group: %hu\n", 1156 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1157 TRANSPORT_MAX_LUNS_PER_TPG-1, 1158 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1159 spin_unlock(&tpg->tpg_lun_lock); 1160 return NULL; 1161 } 1162 lun = tpg->tpg_lun_list[unpacked_lun]; 1163 1164 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { 1165 pr_err("%s Logical Unit Number: %u is not active on" 1166 " Target Portal Group: %hu, ignoring request.\n", 1167 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1168 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1169 spin_unlock(&tpg->tpg_lun_lock); 1170 return NULL; 1171 } 1172 spin_unlock(&tpg->tpg_lun_lock); 1173 1174 return lun; 1175 } 1176 1177 struct se_lun_acl *core_dev_init_initiator_node_lun_acl( 1178 struct se_portal_group *tpg, 1179 u32 mapped_lun, 1180 char *initiatorname, 1181 int *ret) 1182 { 1183 struct se_lun_acl *lacl; 1184 struct se_node_acl *nacl; 1185 1186 if (strlen(initiatorname) >= TRANSPORT_IQN_LEN) { 1187 pr_err("%s InitiatorName exceeds maximum size.\n", 1188 tpg->se_tpg_tfo->get_fabric_name()); 1189 *ret = -EOVERFLOW; 1190 return NULL; 1191 } 1192 nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname); 1193 if (!nacl) { 1194 *ret = -EINVAL; 1195 return NULL; 1196 } 1197 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL); 1198 if (!lacl) { 1199 pr_err("Unable to allocate memory for struct se_lun_acl.\n"); 1200 *ret = -ENOMEM; 1201 return NULL; 1202 } 1203 1204 INIT_LIST_HEAD(&lacl->lacl_list); 1205 lacl->mapped_lun = mapped_lun; 1206 lacl->se_lun_nacl = nacl; 1207 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); 1208 1209 return lacl; 1210 } 1211 1212 int core_dev_add_initiator_node_lun_acl( 1213 struct se_portal_group *tpg, 1214 struct se_lun_acl *lacl, 1215 u32 unpacked_lun, 1216 u32 lun_access) 1217 { 1218 struct se_lun *lun; 1219 struct se_node_acl *nacl; 1220 1221 lun = core_dev_get_lun(tpg, unpacked_lun); 1222 if (!lun) { 1223 pr_err("%s Logical Unit Number: %u is not active on" 1224 " Target Portal Group: %hu, ignoring request.\n", 1225 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1226 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1227 return -EINVAL; 1228 } 1229 1230 nacl = lacl->se_lun_nacl; 1231 if (!nacl) 1232 return -EINVAL; 1233 1234 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) && 1235 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE)) 1236 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; 1237 1238 lacl->se_lun = lun; 1239 1240 if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun, 1241 lun_access, nacl, tpg) < 0) 1242 return -EINVAL; 1243 1244 spin_lock(&lun->lun_acl_lock); 1245 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list); 1246 atomic_inc(&lun->lun_acl_count); 1247 smp_mb__after_atomic_inc(); 1248 spin_unlock(&lun->lun_acl_lock); 1249 1250 pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for " 1251 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(), 1252 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun, 1253 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO", 1254 lacl->initiatorname); 1255 /* 1256 * Check to see if there are any existing persistent reservation APTPL 1257 * pre-registrations that need to be enabled for this LUN ACL.. 1258 */ 1259 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl); 1260 return 0; 1261 } 1262 1263 /* core_dev_del_initiator_node_lun_acl(): 1264 * 1265 * 1266 */ 1267 int core_dev_del_initiator_node_lun_acl( 1268 struct se_portal_group *tpg, 1269 struct se_lun *lun, 1270 struct se_lun_acl *lacl) 1271 { 1272 struct se_node_acl *nacl; 1273 1274 nacl = lacl->se_lun_nacl; 1275 if (!nacl) 1276 return -EINVAL; 1277 1278 spin_lock(&lun->lun_acl_lock); 1279 list_del(&lacl->lacl_list); 1280 atomic_dec(&lun->lun_acl_count); 1281 smp_mb__after_atomic_dec(); 1282 spin_unlock(&lun->lun_acl_lock); 1283 1284 core_disable_device_list_for_node(lun, NULL, lacl->mapped_lun, 1285 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg); 1286 1287 lacl->se_lun = NULL; 1288 1289 pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for" 1290 " InitiatorNode: %s Mapped LUN: %u\n", 1291 tpg->se_tpg_tfo->get_fabric_name(), 1292 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, 1293 lacl->initiatorname, lacl->mapped_lun); 1294 1295 return 0; 1296 } 1297 1298 void core_dev_free_initiator_node_lun_acl( 1299 struct se_portal_group *tpg, 1300 struct se_lun_acl *lacl) 1301 { 1302 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s" 1303 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1304 tpg->se_tpg_tfo->tpg_get_tag(tpg), 1305 tpg->se_tpg_tfo->get_fabric_name(), 1306 lacl->initiatorname, lacl->mapped_lun); 1307 1308 kfree(lacl); 1309 } 1310 1311 static void scsi_dump_inquiry(struct se_device *dev) 1312 { 1313 struct t10_wwn *wwn = &dev->t10_wwn; 1314 char buf[17]; 1315 int i, device_type; 1316 /* 1317 * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer 1318 */ 1319 for (i = 0; i < 8; i++) 1320 if (wwn->vendor[i] >= 0x20) 1321 buf[i] = wwn->vendor[i]; 1322 else 1323 buf[i] = ' '; 1324 buf[i] = '\0'; 1325 pr_debug(" Vendor: %s\n", buf); 1326 1327 for (i = 0; i < 16; i++) 1328 if (wwn->model[i] >= 0x20) 1329 buf[i] = wwn->model[i]; 1330 else 1331 buf[i] = ' '; 1332 buf[i] = '\0'; 1333 pr_debug(" Model: %s\n", buf); 1334 1335 for (i = 0; i < 4; i++) 1336 if (wwn->revision[i] >= 0x20) 1337 buf[i] = wwn->revision[i]; 1338 else 1339 buf[i] = ' '; 1340 buf[i] = '\0'; 1341 pr_debug(" Revision: %s\n", buf); 1342 1343 device_type = dev->transport->get_device_type(dev); 1344 pr_debug(" Type: %s ", scsi_device_type(device_type)); 1345 } 1346 1347 struct se_device *target_alloc_device(struct se_hba *hba, const char *name) 1348 { 1349 struct se_device *dev; 1350 1351 dev = hba->transport->alloc_device(hba, name); 1352 if (!dev) 1353 return NULL; 1354 1355 dev->dev_link_magic = SE_DEV_LINK_MAGIC; 1356 dev->se_hba = hba; 1357 dev->transport = hba->transport; 1358 1359 INIT_LIST_HEAD(&dev->dev_list); 1360 INIT_LIST_HEAD(&dev->dev_sep_list); 1361 INIT_LIST_HEAD(&dev->dev_tmr_list); 1362 INIT_LIST_HEAD(&dev->delayed_cmd_list); 1363 INIT_LIST_HEAD(&dev->state_list); 1364 INIT_LIST_HEAD(&dev->qf_cmd_list); 1365 spin_lock_init(&dev->stats_lock); 1366 spin_lock_init(&dev->execute_task_lock); 1367 spin_lock_init(&dev->delayed_cmd_lock); 1368 spin_lock_init(&dev->dev_reservation_lock); 1369 spin_lock_init(&dev->se_port_lock); 1370 spin_lock_init(&dev->se_tmr_lock); 1371 spin_lock_init(&dev->qf_cmd_lock); 1372 atomic_set(&dev->dev_ordered_id, 0); 1373 INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list); 1374 spin_lock_init(&dev->t10_wwn.t10_vpd_lock); 1375 INIT_LIST_HEAD(&dev->t10_pr.registration_list); 1376 INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list); 1377 spin_lock_init(&dev->t10_pr.registration_lock); 1378 spin_lock_init(&dev->t10_pr.aptpl_reg_lock); 1379 INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list); 1380 spin_lock_init(&dev->t10_alua.tg_pt_gps_lock); 1381 1382 dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN; 1383 dev->t10_wwn.t10_dev = dev; 1384 dev->t10_alua.t10_dev = dev; 1385 1386 dev->dev_attrib.da_dev = dev; 1387 dev->dev_attrib.emulate_dpo = DA_EMULATE_DPO; 1388 dev->dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE; 1389 dev->dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ; 1390 dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE; 1391 dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL; 1392 dev->dev_attrib.emulate_tas = DA_EMULATE_TAS; 1393 dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU; 1394 dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS; 1395 dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS; 1396 dev->dev_attrib.is_nonrot = DA_IS_NONROT; 1397 dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD; 1398 dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT; 1399 dev->dev_attrib.max_unmap_block_desc_count = 1400 DA_MAX_UNMAP_BLOCK_DESC_COUNT; 1401 dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT; 1402 dev->dev_attrib.unmap_granularity_alignment = 1403 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT; 1404 dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN; 1405 dev->dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS; 1406 dev->dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS; 1407 1408 return dev; 1409 } 1410 1411 int target_configure_device(struct se_device *dev) 1412 { 1413 struct se_hba *hba = dev->se_hba; 1414 int ret; 1415 1416 if (dev->dev_flags & DF_CONFIGURED) { 1417 pr_err("se_dev->se_dev_ptr already set for storage" 1418 " object\n"); 1419 return -EEXIST; 1420 } 1421 1422 ret = dev->transport->configure_device(dev); 1423 if (ret) 1424 goto out; 1425 dev->dev_flags |= DF_CONFIGURED; 1426 1427 /* 1428 * XXX: there is not much point to have two different values here.. 1429 */ 1430 dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size; 1431 dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth; 1432 1433 /* 1434 * Align max_hw_sectors down to PAGE_SIZE I/O transfers 1435 */ 1436 dev->dev_attrib.hw_max_sectors = 1437 se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors, 1438 dev->dev_attrib.hw_block_size); 1439 1440 dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX); 1441 dev->creation_time = get_jiffies_64(); 1442 1443 ret = core_setup_alua(dev); 1444 if (ret) 1445 goto out; 1446 1447 /* 1448 * Startup the struct se_device processing thread 1449 */ 1450 dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1, 1451 dev->transport->name); 1452 if (!dev->tmr_wq) { 1453 pr_err("Unable to create tmr workqueue for %s\n", 1454 dev->transport->name); 1455 ret = -ENOMEM; 1456 goto out_free_alua; 1457 } 1458 1459 /* 1460 * Setup work_queue for QUEUE_FULL 1461 */ 1462 INIT_WORK(&dev->qf_work_queue, target_qf_do_work); 1463 1464 /* 1465 * Preload the initial INQUIRY const values if we are doing 1466 * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI 1467 * passthrough because this is being provided by the backend LLD. 1468 */ 1469 if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) { 1470 strncpy(&dev->t10_wwn.vendor[0], "LIO-ORG", 8); 1471 strncpy(&dev->t10_wwn.model[0], 1472 dev->transport->inquiry_prod, 16); 1473 strncpy(&dev->t10_wwn.revision[0], 1474 dev->transport->inquiry_rev, 4); 1475 } 1476 1477 scsi_dump_inquiry(dev); 1478 1479 spin_lock(&hba->device_lock); 1480 hba->dev_count++; 1481 spin_unlock(&hba->device_lock); 1482 return 0; 1483 1484 out_free_alua: 1485 core_alua_free_lu_gp_mem(dev); 1486 out: 1487 se_release_vpd_for_dev(dev); 1488 return ret; 1489 } 1490 1491 void target_free_device(struct se_device *dev) 1492 { 1493 struct se_hba *hba = dev->se_hba; 1494 1495 WARN_ON(!list_empty(&dev->dev_sep_list)); 1496 1497 if (dev->dev_flags & DF_CONFIGURED) { 1498 destroy_workqueue(dev->tmr_wq); 1499 1500 spin_lock(&hba->device_lock); 1501 hba->dev_count--; 1502 spin_unlock(&hba->device_lock); 1503 } 1504 1505 core_alua_free_lu_gp_mem(dev); 1506 core_scsi3_free_all_registrations(dev); 1507 se_release_vpd_for_dev(dev); 1508 1509 dev->transport->free_device(dev); 1510 } 1511 1512 int core_dev_setup_virtual_lun0(void) 1513 { 1514 struct se_hba *hba; 1515 struct se_device *dev; 1516 char buf[16]; 1517 int ret; 1518 1519 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE); 1520 if (IS_ERR(hba)) 1521 return PTR_ERR(hba); 1522 1523 dev = target_alloc_device(hba, "virt_lun0"); 1524 if (!dev) { 1525 ret = -ENOMEM; 1526 goto out_free_hba; 1527 } 1528 1529 memset(buf, 0, 16); 1530 sprintf(buf, "rd_pages=8"); 1531 hba->transport->set_configfs_dev_params(dev, buf, sizeof(buf)); 1532 1533 ret = target_configure_device(dev); 1534 if (ret) 1535 goto out_free_se_dev; 1536 1537 lun0_hba = hba; 1538 g_lun0_dev = dev; 1539 return 0; 1540 1541 out_free_se_dev: 1542 target_free_device(dev); 1543 out_free_hba: 1544 core_delete_hba(hba); 1545 return ret; 1546 } 1547 1548 1549 void core_dev_release_virtual_lun0(void) 1550 { 1551 struct se_hba *hba = lun0_hba; 1552 1553 if (!hba) 1554 return; 1555 1556 if (g_lun0_dev) 1557 target_free_device(g_lun0_dev); 1558 core_delete_hba(hba); 1559 } 1560