1 /******************************************************************************* 2 * Filename: target_core_device.c (based on iscsi_target_device.c) 3 * 4 * This file contains the TCM Virtual Device and Disk Transport 5 * agnostic related functions. 6 * 7 * (c) Copyright 2003-2013 Datera, Inc. 8 * 9 * Nicholas A. Bellinger <nab@kernel.org> 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation; either version 2 of the License, or 14 * (at your option) any later version. 15 * 16 * This program is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 * GNU General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 24 * 25 ******************************************************************************/ 26 27 #include <linux/net.h> 28 #include <linux/string.h> 29 #include <linux/delay.h> 30 #include <linux/timer.h> 31 #include <linux/slab.h> 32 #include <linux/spinlock.h> 33 #include <linux/kthread.h> 34 #include <linux/in.h> 35 #include <linux/export.h> 36 #include <net/sock.h> 37 #include <net/tcp.h> 38 #include <scsi/scsi.h> 39 #include <scsi/scsi_device.h> 40 41 #include <target/target_core_base.h> 42 #include <target/target_core_backend.h> 43 #include <target/target_core_fabric.h> 44 45 #include "target_core_internal.h" 46 #include "target_core_alua.h" 47 #include "target_core_pr.h" 48 #include "target_core_ua.h" 49 50 DEFINE_MUTEX(g_device_mutex); 51 LIST_HEAD(g_device_list); 52 53 static struct se_hba *lun0_hba; 54 /* not static, needed by tpg.c */ 55 struct se_device *g_lun0_dev; 56 57 sense_reason_t 58 transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun) 59 { 60 struct se_lun *se_lun = NULL; 61 struct se_session *se_sess = se_cmd->se_sess; 62 struct se_device *dev; 63 unsigned long flags; 64 65 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) 66 return TCM_NON_EXISTENT_LUN; 67 68 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags); 69 se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun]; 70 if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 71 struct se_dev_entry *deve = se_cmd->se_deve; 72 73 deve->total_cmds++; 74 75 if ((se_cmd->data_direction == DMA_TO_DEVICE) && 76 (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) { 77 pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN" 78 " Access for 0x%08x\n", 79 se_cmd->se_tfo->get_fabric_name(), 80 unpacked_lun); 81 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); 82 return TCM_WRITE_PROTECTED; 83 } 84 85 if (se_cmd->data_direction == DMA_TO_DEVICE) 86 deve->write_bytes += se_cmd->data_length; 87 else if (se_cmd->data_direction == DMA_FROM_DEVICE) 88 deve->read_bytes += se_cmd->data_length; 89 90 se_lun = deve->se_lun; 91 se_cmd->se_lun = deve->se_lun; 92 se_cmd->pr_res_key = deve->pr_res_key; 93 se_cmd->orig_fe_lun = unpacked_lun; 94 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; 95 } 96 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_update_device_list_access( 279 u32 mapped_lun, 280 u32 lun_access, 281 struct se_node_acl *nacl) 282 { 283 struct se_dev_entry *deve; 284 285 spin_lock_irq(&nacl->device_list_lock); 286 deve = nacl->device_list[mapped_lun]; 287 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 288 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 289 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 290 } else { 291 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 292 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 293 } 294 spin_unlock_irq(&nacl->device_list_lock); 295 } 296 297 /* core_enable_device_list_for_node(): 298 * 299 * 300 */ 301 int core_enable_device_list_for_node( 302 struct se_lun *lun, 303 struct se_lun_acl *lun_acl, 304 u32 mapped_lun, 305 u32 lun_access, 306 struct se_node_acl *nacl, 307 struct se_portal_group *tpg) 308 { 309 struct se_port *port = lun->lun_sep; 310 struct se_dev_entry *deve; 311 312 spin_lock_irq(&nacl->device_list_lock); 313 314 deve = nacl->device_list[mapped_lun]; 315 316 /* 317 * Check if the call is handling demo mode -> explict LUN ACL 318 * transition. This transition must be for the same struct se_lun 319 * + mapped_lun that was setup in demo mode.. 320 */ 321 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 322 if (deve->se_lun_acl != NULL) { 323 pr_err("struct se_dev_entry->se_lun_acl" 324 " already set for demo mode -> explict" 325 " LUN ACL transition\n"); 326 spin_unlock_irq(&nacl->device_list_lock); 327 return -EINVAL; 328 } 329 if (deve->se_lun != lun) { 330 pr_err("struct se_dev_entry->se_lun does" 331 " match passed struct se_lun for demo mode" 332 " -> explict LUN ACL transition\n"); 333 spin_unlock_irq(&nacl->device_list_lock); 334 return -EINVAL; 335 } 336 deve->se_lun_acl = lun_acl; 337 338 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 339 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 340 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 341 } else { 342 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 343 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 344 } 345 346 spin_unlock_irq(&nacl->device_list_lock); 347 return 0; 348 } 349 350 deve->se_lun = lun; 351 deve->se_lun_acl = lun_acl; 352 deve->mapped_lun = mapped_lun; 353 deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS; 354 355 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 356 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 357 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 358 } else { 359 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 360 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 361 } 362 363 deve->creation_time = get_jiffies_64(); 364 deve->attach_count++; 365 spin_unlock_irq(&nacl->device_list_lock); 366 367 spin_lock_bh(&port->sep_alua_lock); 368 list_add_tail(&deve->alua_port_list, &port->sep_alua_list); 369 spin_unlock_bh(&port->sep_alua_lock); 370 371 return 0; 372 } 373 374 /* core_disable_device_list_for_node(): 375 * 376 * 377 */ 378 int core_disable_device_list_for_node( 379 struct se_lun *lun, 380 struct se_lun_acl *lun_acl, 381 u32 mapped_lun, 382 u32 lun_access, 383 struct se_node_acl *nacl, 384 struct se_portal_group *tpg) 385 { 386 struct se_port *port = lun->lun_sep; 387 struct se_dev_entry *deve = nacl->device_list[mapped_lun]; 388 389 /* 390 * If the MappedLUN entry is being disabled, the entry in 391 * port->sep_alua_list must be removed now before clearing the 392 * struct se_dev_entry pointers below as logic in 393 * core_alua_do_transition_tg_pt() depends on these being present. 394 * 395 * deve->se_lun_acl will be NULL for demo-mode created LUNs 396 * that have not been explicitly converted to MappedLUNs -> 397 * struct se_lun_acl, but we remove deve->alua_port_list from 398 * port->sep_alua_list. This also means that active UAs and 399 * NodeACL context specific PR metadata for demo-mode 400 * MappedLUN *deve will be released below.. 401 */ 402 spin_lock_bh(&port->sep_alua_lock); 403 list_del(&deve->alua_port_list); 404 spin_unlock_bh(&port->sep_alua_lock); 405 /* 406 * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE 407 * PR operation to complete. 408 */ 409 while (atomic_read(&deve->pr_ref_count) != 0) 410 cpu_relax(); 411 412 spin_lock_irq(&nacl->device_list_lock); 413 /* 414 * Disable struct se_dev_entry LUN ACL mapping 415 */ 416 core_scsi3_ua_release_all(deve); 417 deve->se_lun = NULL; 418 deve->se_lun_acl = NULL; 419 deve->lun_flags = 0; 420 deve->creation_time = 0; 421 deve->attach_count--; 422 spin_unlock_irq(&nacl->device_list_lock); 423 424 core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl); 425 return 0; 426 } 427 428 /* core_clear_lun_from_tpg(): 429 * 430 * 431 */ 432 void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg) 433 { 434 struct se_node_acl *nacl; 435 struct se_dev_entry *deve; 436 u32 i; 437 438 spin_lock_irq(&tpg->acl_node_lock); 439 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) { 440 spin_unlock_irq(&tpg->acl_node_lock); 441 442 spin_lock_irq(&nacl->device_list_lock); 443 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 444 deve = nacl->device_list[i]; 445 if (lun != deve->se_lun) 446 continue; 447 spin_unlock_irq(&nacl->device_list_lock); 448 449 core_disable_device_list_for_node(lun, NULL, 450 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS, 451 nacl, tpg); 452 453 spin_lock_irq(&nacl->device_list_lock); 454 } 455 spin_unlock_irq(&nacl->device_list_lock); 456 457 spin_lock_irq(&tpg->acl_node_lock); 458 } 459 spin_unlock_irq(&tpg->acl_node_lock); 460 } 461 462 static struct se_port *core_alloc_port(struct se_device *dev) 463 { 464 struct se_port *port, *port_tmp; 465 466 port = kzalloc(sizeof(struct se_port), GFP_KERNEL); 467 if (!port) { 468 pr_err("Unable to allocate struct se_port\n"); 469 return ERR_PTR(-ENOMEM); 470 } 471 INIT_LIST_HEAD(&port->sep_alua_list); 472 INIT_LIST_HEAD(&port->sep_list); 473 atomic_set(&port->sep_tg_pt_secondary_offline, 0); 474 spin_lock_init(&port->sep_alua_lock); 475 mutex_init(&port->sep_tg_pt_md_mutex); 476 477 spin_lock(&dev->se_port_lock); 478 if (dev->dev_port_count == 0x0000ffff) { 479 pr_warn("Reached dev->dev_port_count ==" 480 " 0x0000ffff\n"); 481 spin_unlock(&dev->se_port_lock); 482 return ERR_PTR(-ENOSPC); 483 } 484 again: 485 /* 486 * Allocate the next RELATIVE TARGET PORT IDENTIFIER for this struct se_device 487 * Here is the table from spc4r17 section 7.7.3.8. 488 * 489 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field 490 * 491 * Code Description 492 * 0h Reserved 493 * 1h Relative port 1, historically known as port A 494 * 2h Relative port 2, historically known as port B 495 * 3h to FFFFh Relative port 3 through 65 535 496 */ 497 port->sep_rtpi = dev->dev_rpti_counter++; 498 if (!port->sep_rtpi) 499 goto again; 500 501 list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) { 502 /* 503 * Make sure RELATIVE TARGET PORT IDENTIFIER is unique 504 * for 16-bit wrap.. 505 */ 506 if (port->sep_rtpi == port_tmp->sep_rtpi) 507 goto again; 508 } 509 spin_unlock(&dev->se_port_lock); 510 511 return port; 512 } 513 514 static void core_export_port( 515 struct se_device *dev, 516 struct se_portal_group *tpg, 517 struct se_port *port, 518 struct se_lun *lun) 519 { 520 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL; 521 522 spin_lock(&dev->se_port_lock); 523 spin_lock(&lun->lun_sep_lock); 524 port->sep_tpg = tpg; 525 port->sep_lun = lun; 526 lun->lun_sep = port; 527 spin_unlock(&lun->lun_sep_lock); 528 529 list_add_tail(&port->sep_list, &dev->dev_sep_list); 530 spin_unlock(&dev->se_port_lock); 531 532 if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV && 533 !(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) { 534 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port); 535 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) { 536 pr_err("Unable to allocate t10_alua_tg_pt" 537 "_gp_member_t\n"); 538 return; 539 } 540 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 541 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem, 542 dev->t10_alua.default_tg_pt_gp); 543 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 544 pr_debug("%s/%s: Adding to default ALUA Target Port" 545 " Group: alua/default_tg_pt_gp\n", 546 dev->transport->name, tpg->se_tpg_tfo->get_fabric_name()); 547 } 548 549 dev->dev_port_count++; 550 port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFIER */ 551 } 552 553 /* 554 * Called with struct se_device->se_port_lock spinlock held. 555 */ 556 static void core_release_port(struct se_device *dev, struct se_port *port) 557 __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock) 558 { 559 /* 560 * Wait for any port reference for PR ALL_TG_PT=1 operation 561 * to complete in __core_scsi3_alloc_registration() 562 */ 563 spin_unlock(&dev->se_port_lock); 564 if (atomic_read(&port->sep_tg_pt_ref_cnt)) 565 cpu_relax(); 566 spin_lock(&dev->se_port_lock); 567 568 core_alua_free_tg_pt_gp_mem(port); 569 570 list_del(&port->sep_list); 571 dev->dev_port_count--; 572 kfree(port); 573 } 574 575 int core_dev_export( 576 struct se_device *dev, 577 struct se_portal_group *tpg, 578 struct se_lun *lun) 579 { 580 struct se_hba *hba = dev->se_hba; 581 struct se_port *port; 582 583 port = core_alloc_port(dev); 584 if (IS_ERR(port)) 585 return PTR_ERR(port); 586 587 lun->lun_se_dev = dev; 588 589 spin_lock(&hba->device_lock); 590 dev->export_count++; 591 spin_unlock(&hba->device_lock); 592 593 core_export_port(dev, tpg, port, lun); 594 return 0; 595 } 596 597 void core_dev_unexport( 598 struct se_device *dev, 599 struct se_portal_group *tpg, 600 struct se_lun *lun) 601 { 602 struct se_hba *hba = dev->se_hba; 603 struct se_port *port = lun->lun_sep; 604 605 spin_lock(&lun->lun_sep_lock); 606 if (lun->lun_se_dev == NULL) { 607 spin_unlock(&lun->lun_sep_lock); 608 return; 609 } 610 spin_unlock(&lun->lun_sep_lock); 611 612 spin_lock(&dev->se_port_lock); 613 core_release_port(dev, port); 614 spin_unlock(&dev->se_port_lock); 615 616 spin_lock(&hba->device_lock); 617 dev->export_count--; 618 spin_unlock(&hba->device_lock); 619 620 lun->lun_se_dev = NULL; 621 } 622 623 static void se_release_vpd_for_dev(struct se_device *dev) 624 { 625 struct t10_vpd *vpd, *vpd_tmp; 626 627 spin_lock(&dev->t10_wwn.t10_vpd_lock); 628 list_for_each_entry_safe(vpd, vpd_tmp, 629 &dev->t10_wwn.t10_vpd_list, vpd_list) { 630 list_del(&vpd->vpd_list); 631 kfree(vpd); 632 } 633 spin_unlock(&dev->t10_wwn.t10_vpd_lock); 634 } 635 636 static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size) 637 { 638 u32 aligned_max_sectors; 639 u32 alignment; 640 /* 641 * Limit max_sectors to a PAGE_SIZE aligned value for modern 642 * transport_allocate_data_tasks() operation. 643 */ 644 alignment = max(1ul, PAGE_SIZE / block_size); 645 aligned_max_sectors = rounddown(max_sectors, alignment); 646 647 if (max_sectors != aligned_max_sectors) 648 pr_info("Rounding down aligned max_sectors from %u to %u\n", 649 max_sectors, aligned_max_sectors); 650 651 return aligned_max_sectors; 652 } 653 654 int se_dev_set_max_unmap_lba_count( 655 struct se_device *dev, 656 u32 max_unmap_lba_count) 657 { 658 dev->dev_attrib.max_unmap_lba_count = max_unmap_lba_count; 659 pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n", 660 dev, dev->dev_attrib.max_unmap_lba_count); 661 return 0; 662 } 663 664 int se_dev_set_max_unmap_block_desc_count( 665 struct se_device *dev, 666 u32 max_unmap_block_desc_count) 667 { 668 dev->dev_attrib.max_unmap_block_desc_count = 669 max_unmap_block_desc_count; 670 pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n", 671 dev, dev->dev_attrib.max_unmap_block_desc_count); 672 return 0; 673 } 674 675 int se_dev_set_unmap_granularity( 676 struct se_device *dev, 677 u32 unmap_granularity) 678 { 679 dev->dev_attrib.unmap_granularity = unmap_granularity; 680 pr_debug("dev[%p]: Set unmap_granularity: %u\n", 681 dev, dev->dev_attrib.unmap_granularity); 682 return 0; 683 } 684 685 int se_dev_set_unmap_granularity_alignment( 686 struct se_device *dev, 687 u32 unmap_granularity_alignment) 688 { 689 dev->dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment; 690 pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n", 691 dev, dev->dev_attrib.unmap_granularity_alignment); 692 return 0; 693 } 694 695 int se_dev_set_max_write_same_len( 696 struct se_device *dev, 697 u32 max_write_same_len) 698 { 699 dev->dev_attrib.max_write_same_len = max_write_same_len; 700 pr_debug("dev[%p]: Set max_write_same_len: %u\n", 701 dev, dev->dev_attrib.max_write_same_len); 702 return 0; 703 } 704 705 static void dev_set_t10_wwn_model_alias(struct se_device *dev) 706 { 707 const char *configname; 708 709 configname = config_item_name(&dev->dev_group.cg_item); 710 if (strlen(configname) >= 16) { 711 pr_warn("dev[%p]: Backstore name '%s' is too long for " 712 "INQUIRY_MODEL, truncating to 16 bytes\n", dev, 713 configname); 714 } 715 snprintf(&dev->t10_wwn.model[0], 16, "%s", configname); 716 } 717 718 int se_dev_set_emulate_model_alias(struct se_device *dev, int flag) 719 { 720 if (dev->export_count) { 721 pr_err("dev[%p]: Unable to change model alias" 722 " while export_count is %d\n", 723 dev, dev->export_count); 724 return -EINVAL; 725 } 726 727 if (flag != 0 && flag != 1) { 728 pr_err("Illegal value %d\n", flag); 729 return -EINVAL; 730 } 731 732 if (flag) { 733 dev_set_t10_wwn_model_alias(dev); 734 } else { 735 strncpy(&dev->t10_wwn.model[0], 736 dev->transport->inquiry_prod, 16); 737 } 738 dev->dev_attrib.emulate_model_alias = flag; 739 740 return 0; 741 } 742 743 int se_dev_set_emulate_dpo(struct se_device *dev, int flag) 744 { 745 if (flag != 0 && flag != 1) { 746 pr_err("Illegal value %d\n", flag); 747 return -EINVAL; 748 } 749 750 if (flag) { 751 pr_err("dpo_emulated not supported\n"); 752 return -EINVAL; 753 } 754 755 return 0; 756 } 757 758 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag) 759 { 760 if (flag != 0 && flag != 1) { 761 pr_err("Illegal value %d\n", flag); 762 return -EINVAL; 763 } 764 765 if (flag && 766 dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 767 pr_err("emulate_fua_write not supported for pSCSI\n"); 768 return -EINVAL; 769 } 770 dev->dev_attrib.emulate_fua_write = flag; 771 pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n", 772 dev, dev->dev_attrib.emulate_fua_write); 773 return 0; 774 } 775 776 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag) 777 { 778 if (flag != 0 && flag != 1) { 779 pr_err("Illegal value %d\n", flag); 780 return -EINVAL; 781 } 782 783 if (flag) { 784 pr_err("ua read emulated not supported\n"); 785 return -EINVAL; 786 } 787 788 return 0; 789 } 790 791 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag) 792 { 793 if (flag != 0 && flag != 1) { 794 pr_err("Illegal value %d\n", flag); 795 return -EINVAL; 796 } 797 if (flag && 798 dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 799 pr_err("emulate_write_cache not supported for pSCSI\n"); 800 return -EINVAL; 801 } 802 if (dev->transport->get_write_cache) { 803 pr_warn("emulate_write_cache cannot be changed when underlying" 804 " HW reports WriteCacheEnabled, ignoring request\n"); 805 return 0; 806 } 807 808 dev->dev_attrib.emulate_write_cache = flag; 809 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 810 dev, dev->dev_attrib.emulate_write_cache); 811 return 0; 812 } 813 814 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag) 815 { 816 if ((flag != 0) && (flag != 1) && (flag != 2)) { 817 pr_err("Illegal value %d\n", flag); 818 return -EINVAL; 819 } 820 821 if (dev->export_count) { 822 pr_err("dev[%p]: Unable to change SE Device" 823 " UA_INTRLCK_CTRL while export_count is %d\n", 824 dev, dev->export_count); 825 return -EINVAL; 826 } 827 dev->dev_attrib.emulate_ua_intlck_ctrl = flag; 828 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 829 dev, dev->dev_attrib.emulate_ua_intlck_ctrl); 830 831 return 0; 832 } 833 834 int se_dev_set_emulate_tas(struct se_device *dev, int flag) 835 { 836 if ((flag != 0) && (flag != 1)) { 837 pr_err("Illegal value %d\n", flag); 838 return -EINVAL; 839 } 840 841 if (dev->export_count) { 842 pr_err("dev[%p]: Unable to change SE Device TAS while" 843 " export_count is %d\n", 844 dev, dev->export_count); 845 return -EINVAL; 846 } 847 dev->dev_attrib.emulate_tas = flag; 848 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 849 dev, (dev->dev_attrib.emulate_tas) ? "Enabled" : "Disabled"); 850 851 return 0; 852 } 853 854 int se_dev_set_emulate_tpu(struct se_device *dev, int flag) 855 { 856 if ((flag != 0) && (flag != 1)) { 857 pr_err("Illegal value %d\n", flag); 858 return -EINVAL; 859 } 860 /* 861 * We expect this value to be non-zero when generic Block Layer 862 * Discard supported is detected iblock_create_virtdevice(). 863 */ 864 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) { 865 pr_err("Generic Block Discard not supported\n"); 866 return -ENOSYS; 867 } 868 869 dev->dev_attrib.emulate_tpu = flag; 870 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 871 dev, flag); 872 return 0; 873 } 874 875 int se_dev_set_emulate_tpws(struct se_device *dev, int flag) 876 { 877 if ((flag != 0) && (flag != 1)) { 878 pr_err("Illegal value %d\n", flag); 879 return -EINVAL; 880 } 881 /* 882 * We expect this value to be non-zero when generic Block Layer 883 * Discard supported is detected iblock_create_virtdevice(). 884 */ 885 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) { 886 pr_err("Generic Block Discard not supported\n"); 887 return -ENOSYS; 888 } 889 890 dev->dev_attrib.emulate_tpws = flag; 891 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 892 dev, flag); 893 return 0; 894 } 895 896 int se_dev_set_emulate_caw(struct se_device *dev, int flag) 897 { 898 if (flag != 0 && flag != 1) { 899 pr_err("Illegal value %d\n", flag); 900 return -EINVAL; 901 } 902 dev->dev_attrib.emulate_caw = flag; 903 pr_debug("dev[%p]: SE Device CompareAndWrite (AtomicTestandSet): %d\n", 904 dev, flag); 905 906 return 0; 907 } 908 909 int se_dev_set_emulate_3pc(struct se_device *dev, int flag) 910 { 911 if (flag != 0 && flag != 1) { 912 pr_err("Illegal value %d\n", flag); 913 return -EINVAL; 914 } 915 dev->dev_attrib.emulate_3pc = flag; 916 pr_debug("dev[%p]: SE Device 3rd Party Copy (EXTENDED_COPY): %d\n", 917 dev, flag); 918 919 return 0; 920 } 921 922 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag) 923 { 924 if ((flag != 0) && (flag != 1)) { 925 pr_err("Illegal value %d\n", flag); 926 return -EINVAL; 927 } 928 dev->dev_attrib.enforce_pr_isids = flag; 929 pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev, 930 (dev->dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled"); 931 return 0; 932 } 933 934 int se_dev_set_is_nonrot(struct se_device *dev, int flag) 935 { 936 if ((flag != 0) && (flag != 1)) { 937 printk(KERN_ERR "Illegal value %d\n", flag); 938 return -EINVAL; 939 } 940 dev->dev_attrib.is_nonrot = flag; 941 pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n", 942 dev, flag); 943 return 0; 944 } 945 946 int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag) 947 { 948 if (flag != 0) { 949 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted" 950 " reordering not implemented\n", dev); 951 return -ENOSYS; 952 } 953 dev->dev_attrib.emulate_rest_reord = flag; 954 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag); 955 return 0; 956 } 957 958 /* 959 * Note, this can only be called on unexported SE Device Object. 960 */ 961 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth) 962 { 963 if (dev->export_count) { 964 pr_err("dev[%p]: Unable to change SE Device TCQ while" 965 " export_count is %d\n", 966 dev, dev->export_count); 967 return -EINVAL; 968 } 969 if (!queue_depth) { 970 pr_err("dev[%p]: Illegal ZERO value for queue" 971 "_depth\n", dev); 972 return -EINVAL; 973 } 974 975 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 976 if (queue_depth > dev->dev_attrib.hw_queue_depth) { 977 pr_err("dev[%p]: Passed queue_depth: %u" 978 " exceeds TCM/SE_Device TCQ: %u\n", 979 dev, queue_depth, 980 dev->dev_attrib.hw_queue_depth); 981 return -EINVAL; 982 } 983 } else { 984 if (queue_depth > dev->dev_attrib.queue_depth) { 985 if (queue_depth > dev->dev_attrib.hw_queue_depth) { 986 pr_err("dev[%p]: Passed queue_depth:" 987 " %u exceeds TCM/SE_Device MAX" 988 " TCQ: %u\n", dev, queue_depth, 989 dev->dev_attrib.hw_queue_depth); 990 return -EINVAL; 991 } 992 } 993 } 994 995 dev->dev_attrib.queue_depth = dev->queue_depth = queue_depth; 996 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", 997 dev, queue_depth); 998 return 0; 999 } 1000 1001 int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors) 1002 { 1003 int block_size = dev->dev_attrib.block_size; 1004 1005 if (dev->export_count) { 1006 pr_err("dev[%p]: Unable to change SE Device" 1007 " fabric_max_sectors while export_count is %d\n", 1008 dev, dev->export_count); 1009 return -EINVAL; 1010 } 1011 if (!fabric_max_sectors) { 1012 pr_err("dev[%p]: Illegal ZERO value for" 1013 " fabric_max_sectors\n", dev); 1014 return -EINVAL; 1015 } 1016 if (fabric_max_sectors < DA_STATUS_MAX_SECTORS_MIN) { 1017 pr_err("dev[%p]: Passed fabric_max_sectors: %u less than" 1018 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, fabric_max_sectors, 1019 DA_STATUS_MAX_SECTORS_MIN); 1020 return -EINVAL; 1021 } 1022 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1023 if (fabric_max_sectors > dev->dev_attrib.hw_max_sectors) { 1024 pr_err("dev[%p]: Passed fabric_max_sectors: %u" 1025 " greater than TCM/SE_Device max_sectors:" 1026 " %u\n", dev, fabric_max_sectors, 1027 dev->dev_attrib.hw_max_sectors); 1028 return -EINVAL; 1029 } 1030 } else { 1031 if (fabric_max_sectors > DA_STATUS_MAX_SECTORS_MAX) { 1032 pr_err("dev[%p]: Passed fabric_max_sectors: %u" 1033 " greater than DA_STATUS_MAX_SECTORS_MAX:" 1034 " %u\n", dev, fabric_max_sectors, 1035 DA_STATUS_MAX_SECTORS_MAX); 1036 return -EINVAL; 1037 } 1038 } 1039 /* 1040 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks() 1041 */ 1042 if (!block_size) { 1043 block_size = 512; 1044 pr_warn("Defaulting to 512 for zero block_size\n"); 1045 } 1046 fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors, 1047 block_size); 1048 1049 dev->dev_attrib.fabric_max_sectors = fabric_max_sectors; 1050 pr_debug("dev[%p]: SE Device max_sectors changed to %u\n", 1051 dev, fabric_max_sectors); 1052 return 0; 1053 } 1054 1055 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors) 1056 { 1057 if (dev->export_count) { 1058 pr_err("dev[%p]: Unable to change SE Device" 1059 " optimal_sectors while export_count is %d\n", 1060 dev, dev->export_count); 1061 return -EINVAL; 1062 } 1063 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1064 pr_err("dev[%p]: Passed optimal_sectors cannot be" 1065 " changed for TCM/pSCSI\n", dev); 1066 return -EINVAL; 1067 } 1068 if (optimal_sectors > dev->dev_attrib.fabric_max_sectors) { 1069 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1070 " greater than fabric_max_sectors: %u\n", dev, 1071 optimal_sectors, dev->dev_attrib.fabric_max_sectors); 1072 return -EINVAL; 1073 } 1074 1075 dev->dev_attrib.optimal_sectors = optimal_sectors; 1076 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1077 dev, optimal_sectors); 1078 return 0; 1079 } 1080 1081 int se_dev_set_block_size(struct se_device *dev, u32 block_size) 1082 { 1083 if (dev->export_count) { 1084 pr_err("dev[%p]: Unable to change SE Device block_size" 1085 " while export_count is %d\n", 1086 dev, dev->export_count); 1087 return -EINVAL; 1088 } 1089 1090 if ((block_size != 512) && 1091 (block_size != 1024) && 1092 (block_size != 2048) && 1093 (block_size != 4096)) { 1094 pr_err("dev[%p]: Illegal value for block_device: %u" 1095 " for SE device, must be 512, 1024, 2048 or 4096\n", 1096 dev, block_size); 1097 return -EINVAL; 1098 } 1099 1100 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1101 pr_err("dev[%p]: Not allowed to change block_size for" 1102 " Physical Device, use for Linux/SCSI to change" 1103 " block_size for underlying hardware\n", dev); 1104 return -EINVAL; 1105 } 1106 1107 dev->dev_attrib.block_size = block_size; 1108 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1109 dev, block_size); 1110 return 0; 1111 } 1112 1113 struct se_lun *core_dev_add_lun( 1114 struct se_portal_group *tpg, 1115 struct se_device *dev, 1116 u32 lun) 1117 { 1118 struct se_lun *lun_p; 1119 int rc; 1120 1121 lun_p = core_tpg_pre_addlun(tpg, lun); 1122 if (IS_ERR(lun_p)) 1123 return lun_p; 1124 1125 rc = core_tpg_post_addlun(tpg, lun_p, 1126 TRANSPORT_LUNFLAGS_READ_WRITE, dev); 1127 if (rc < 0) 1128 return ERR_PTR(rc); 1129 1130 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from" 1131 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1132 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun_p->unpacked_lun, 1133 tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id); 1134 /* 1135 * Update LUN maps for dynamically added initiators when 1136 * generate_node_acl is enabled. 1137 */ 1138 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) { 1139 struct se_node_acl *acl; 1140 spin_lock_irq(&tpg->acl_node_lock); 1141 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { 1142 if (acl->dynamic_node_acl && 1143 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only || 1144 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) { 1145 spin_unlock_irq(&tpg->acl_node_lock); 1146 core_tpg_add_node_to_devs(acl, tpg); 1147 spin_lock_irq(&tpg->acl_node_lock); 1148 } 1149 } 1150 spin_unlock_irq(&tpg->acl_node_lock); 1151 } 1152 1153 return lun_p; 1154 } 1155 1156 /* core_dev_del_lun(): 1157 * 1158 * 1159 */ 1160 int core_dev_del_lun( 1161 struct se_portal_group *tpg, 1162 u32 unpacked_lun) 1163 { 1164 struct se_lun *lun; 1165 1166 lun = core_tpg_pre_dellun(tpg, unpacked_lun); 1167 if (IS_ERR(lun)) 1168 return PTR_ERR(lun); 1169 1170 core_tpg_post_dellun(tpg, lun); 1171 1172 pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from" 1173 " device object\n", tpg->se_tpg_tfo->get_fabric_name(), 1174 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, 1175 tpg->se_tpg_tfo->get_fabric_name()); 1176 1177 return 0; 1178 } 1179 1180 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun) 1181 { 1182 struct se_lun *lun; 1183 1184 spin_lock(&tpg->tpg_lun_lock); 1185 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1186 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS" 1187 "_PER_TPG-1: %u for Target Portal Group: %hu\n", 1188 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1189 TRANSPORT_MAX_LUNS_PER_TPG-1, 1190 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1191 spin_unlock(&tpg->tpg_lun_lock); 1192 return NULL; 1193 } 1194 lun = tpg->tpg_lun_list[unpacked_lun]; 1195 1196 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) { 1197 pr_err("%s Logical Unit Number: %u is not free on" 1198 " Target Portal Group: %hu, ignoring request.\n", 1199 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1200 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1201 spin_unlock(&tpg->tpg_lun_lock); 1202 return NULL; 1203 } 1204 spin_unlock(&tpg->tpg_lun_lock); 1205 1206 return lun; 1207 } 1208 1209 /* core_dev_get_lun(): 1210 * 1211 * 1212 */ 1213 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun) 1214 { 1215 struct se_lun *lun; 1216 1217 spin_lock(&tpg->tpg_lun_lock); 1218 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1219 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER" 1220 "_TPG-1: %u for Target Portal Group: %hu\n", 1221 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1222 TRANSPORT_MAX_LUNS_PER_TPG-1, 1223 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1224 spin_unlock(&tpg->tpg_lun_lock); 1225 return NULL; 1226 } 1227 lun = tpg->tpg_lun_list[unpacked_lun]; 1228 1229 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { 1230 pr_err("%s Logical Unit Number: %u is not active on" 1231 " Target Portal Group: %hu, ignoring request.\n", 1232 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1233 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1234 spin_unlock(&tpg->tpg_lun_lock); 1235 return NULL; 1236 } 1237 spin_unlock(&tpg->tpg_lun_lock); 1238 1239 return lun; 1240 } 1241 1242 struct se_lun_acl *core_dev_init_initiator_node_lun_acl( 1243 struct se_portal_group *tpg, 1244 struct se_node_acl *nacl, 1245 u32 mapped_lun, 1246 int *ret) 1247 { 1248 struct se_lun_acl *lacl; 1249 1250 if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) { 1251 pr_err("%s InitiatorName exceeds maximum size.\n", 1252 tpg->se_tpg_tfo->get_fabric_name()); 1253 *ret = -EOVERFLOW; 1254 return NULL; 1255 } 1256 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL); 1257 if (!lacl) { 1258 pr_err("Unable to allocate memory for struct se_lun_acl.\n"); 1259 *ret = -ENOMEM; 1260 return NULL; 1261 } 1262 1263 INIT_LIST_HEAD(&lacl->lacl_list); 1264 lacl->mapped_lun = mapped_lun; 1265 lacl->se_lun_nacl = nacl; 1266 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", 1267 nacl->initiatorname); 1268 1269 return lacl; 1270 } 1271 1272 int core_dev_add_initiator_node_lun_acl( 1273 struct se_portal_group *tpg, 1274 struct se_lun_acl *lacl, 1275 u32 unpacked_lun, 1276 u32 lun_access) 1277 { 1278 struct se_lun *lun; 1279 struct se_node_acl *nacl; 1280 1281 lun = core_dev_get_lun(tpg, unpacked_lun); 1282 if (!lun) { 1283 pr_err("%s Logical Unit Number: %u is not active on" 1284 " Target Portal Group: %hu, ignoring request.\n", 1285 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1286 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1287 return -EINVAL; 1288 } 1289 1290 nacl = lacl->se_lun_nacl; 1291 if (!nacl) 1292 return -EINVAL; 1293 1294 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) && 1295 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE)) 1296 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; 1297 1298 lacl->se_lun = lun; 1299 1300 if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun, 1301 lun_access, nacl, tpg) < 0) 1302 return -EINVAL; 1303 1304 spin_lock(&lun->lun_acl_lock); 1305 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list); 1306 atomic_inc(&lun->lun_acl_count); 1307 smp_mb__after_atomic_inc(); 1308 spin_unlock(&lun->lun_acl_lock); 1309 1310 pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for " 1311 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(), 1312 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun, 1313 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO", 1314 lacl->initiatorname); 1315 /* 1316 * Check to see if there are any existing persistent reservation APTPL 1317 * pre-registrations that need to be enabled for this LUN ACL.. 1318 */ 1319 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl); 1320 return 0; 1321 } 1322 1323 /* core_dev_del_initiator_node_lun_acl(): 1324 * 1325 * 1326 */ 1327 int core_dev_del_initiator_node_lun_acl( 1328 struct se_portal_group *tpg, 1329 struct se_lun *lun, 1330 struct se_lun_acl *lacl) 1331 { 1332 struct se_node_acl *nacl; 1333 1334 nacl = lacl->se_lun_nacl; 1335 if (!nacl) 1336 return -EINVAL; 1337 1338 spin_lock(&lun->lun_acl_lock); 1339 list_del(&lacl->lacl_list); 1340 atomic_dec(&lun->lun_acl_count); 1341 smp_mb__after_atomic_dec(); 1342 spin_unlock(&lun->lun_acl_lock); 1343 1344 core_disable_device_list_for_node(lun, NULL, lacl->mapped_lun, 1345 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg); 1346 1347 lacl->se_lun = NULL; 1348 1349 pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for" 1350 " InitiatorNode: %s Mapped LUN: %u\n", 1351 tpg->se_tpg_tfo->get_fabric_name(), 1352 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, 1353 lacl->initiatorname, lacl->mapped_lun); 1354 1355 return 0; 1356 } 1357 1358 void core_dev_free_initiator_node_lun_acl( 1359 struct se_portal_group *tpg, 1360 struct se_lun_acl *lacl) 1361 { 1362 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s" 1363 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1364 tpg->se_tpg_tfo->tpg_get_tag(tpg), 1365 tpg->se_tpg_tfo->get_fabric_name(), 1366 lacl->initiatorname, lacl->mapped_lun); 1367 1368 kfree(lacl); 1369 } 1370 1371 static void scsi_dump_inquiry(struct se_device *dev) 1372 { 1373 struct t10_wwn *wwn = &dev->t10_wwn; 1374 char buf[17]; 1375 int i, device_type; 1376 /* 1377 * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer 1378 */ 1379 for (i = 0; i < 8; i++) 1380 if (wwn->vendor[i] >= 0x20) 1381 buf[i] = wwn->vendor[i]; 1382 else 1383 buf[i] = ' '; 1384 buf[i] = '\0'; 1385 pr_debug(" Vendor: %s\n", buf); 1386 1387 for (i = 0; i < 16; i++) 1388 if (wwn->model[i] >= 0x20) 1389 buf[i] = wwn->model[i]; 1390 else 1391 buf[i] = ' '; 1392 buf[i] = '\0'; 1393 pr_debug(" Model: %s\n", buf); 1394 1395 for (i = 0; i < 4; i++) 1396 if (wwn->revision[i] >= 0x20) 1397 buf[i] = wwn->revision[i]; 1398 else 1399 buf[i] = ' '; 1400 buf[i] = '\0'; 1401 pr_debug(" Revision: %s\n", buf); 1402 1403 device_type = dev->transport->get_device_type(dev); 1404 pr_debug(" Type: %s ", scsi_device_type(device_type)); 1405 } 1406 1407 struct se_device *target_alloc_device(struct se_hba *hba, const char *name) 1408 { 1409 struct se_device *dev; 1410 1411 dev = hba->transport->alloc_device(hba, name); 1412 if (!dev) 1413 return NULL; 1414 1415 dev->dev_link_magic = SE_DEV_LINK_MAGIC; 1416 dev->se_hba = hba; 1417 dev->transport = hba->transport; 1418 1419 INIT_LIST_HEAD(&dev->dev_list); 1420 INIT_LIST_HEAD(&dev->dev_sep_list); 1421 INIT_LIST_HEAD(&dev->dev_tmr_list); 1422 INIT_LIST_HEAD(&dev->delayed_cmd_list); 1423 INIT_LIST_HEAD(&dev->state_list); 1424 INIT_LIST_HEAD(&dev->qf_cmd_list); 1425 INIT_LIST_HEAD(&dev->g_dev_node); 1426 spin_lock_init(&dev->stats_lock); 1427 spin_lock_init(&dev->execute_task_lock); 1428 spin_lock_init(&dev->delayed_cmd_lock); 1429 spin_lock_init(&dev->dev_reservation_lock); 1430 spin_lock_init(&dev->se_port_lock); 1431 spin_lock_init(&dev->se_tmr_lock); 1432 spin_lock_init(&dev->qf_cmd_lock); 1433 sema_init(&dev->caw_sem, 1); 1434 atomic_set(&dev->dev_ordered_id, 0); 1435 INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list); 1436 spin_lock_init(&dev->t10_wwn.t10_vpd_lock); 1437 INIT_LIST_HEAD(&dev->t10_pr.registration_list); 1438 INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list); 1439 spin_lock_init(&dev->t10_pr.registration_lock); 1440 spin_lock_init(&dev->t10_pr.aptpl_reg_lock); 1441 INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list); 1442 spin_lock_init(&dev->t10_alua.tg_pt_gps_lock); 1443 1444 dev->t10_wwn.t10_dev = dev; 1445 dev->t10_alua.t10_dev = dev; 1446 1447 dev->dev_attrib.da_dev = dev; 1448 dev->dev_attrib.emulate_model_alias = DA_EMULATE_MODEL_ALIAS; 1449 dev->dev_attrib.emulate_dpo = DA_EMULATE_DPO; 1450 dev->dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE; 1451 dev->dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ; 1452 dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE; 1453 dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL; 1454 dev->dev_attrib.emulate_tas = DA_EMULATE_TAS; 1455 dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU; 1456 dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS; 1457 dev->dev_attrib.emulate_caw = DA_EMULATE_CAW; 1458 dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC; 1459 dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS; 1460 dev->dev_attrib.is_nonrot = DA_IS_NONROT; 1461 dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD; 1462 dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT; 1463 dev->dev_attrib.max_unmap_block_desc_count = 1464 DA_MAX_UNMAP_BLOCK_DESC_COUNT; 1465 dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT; 1466 dev->dev_attrib.unmap_granularity_alignment = 1467 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT; 1468 dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN; 1469 dev->dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS; 1470 dev->dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS; 1471 1472 return dev; 1473 } 1474 1475 int target_configure_device(struct se_device *dev) 1476 { 1477 struct se_hba *hba = dev->se_hba; 1478 int ret; 1479 1480 if (dev->dev_flags & DF_CONFIGURED) { 1481 pr_err("se_dev->se_dev_ptr already set for storage" 1482 " object\n"); 1483 return -EEXIST; 1484 } 1485 1486 ret = dev->transport->configure_device(dev); 1487 if (ret) 1488 goto out; 1489 dev->dev_flags |= DF_CONFIGURED; 1490 1491 /* 1492 * XXX: there is not much point to have two different values here.. 1493 */ 1494 dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size; 1495 dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth; 1496 1497 /* 1498 * Align max_hw_sectors down to PAGE_SIZE I/O transfers 1499 */ 1500 dev->dev_attrib.hw_max_sectors = 1501 se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors, 1502 dev->dev_attrib.hw_block_size); 1503 1504 dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX); 1505 dev->creation_time = get_jiffies_64(); 1506 1507 ret = core_setup_alua(dev); 1508 if (ret) 1509 goto out; 1510 1511 /* 1512 * Startup the struct se_device processing thread 1513 */ 1514 dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1, 1515 dev->transport->name); 1516 if (!dev->tmr_wq) { 1517 pr_err("Unable to create tmr workqueue for %s\n", 1518 dev->transport->name); 1519 ret = -ENOMEM; 1520 goto out_free_alua; 1521 } 1522 1523 /* 1524 * Setup work_queue for QUEUE_FULL 1525 */ 1526 INIT_WORK(&dev->qf_work_queue, target_qf_do_work); 1527 1528 /* 1529 * Preload the initial INQUIRY const values if we are doing 1530 * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI 1531 * passthrough because this is being provided by the backend LLD. 1532 */ 1533 if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) { 1534 strncpy(&dev->t10_wwn.vendor[0], "LIO-ORG", 8); 1535 strncpy(&dev->t10_wwn.model[0], 1536 dev->transport->inquiry_prod, 16); 1537 strncpy(&dev->t10_wwn.revision[0], 1538 dev->transport->inquiry_rev, 4); 1539 } 1540 1541 scsi_dump_inquiry(dev); 1542 1543 spin_lock(&hba->device_lock); 1544 hba->dev_count++; 1545 spin_unlock(&hba->device_lock); 1546 1547 mutex_lock(&g_device_mutex); 1548 list_add_tail(&dev->g_dev_node, &g_device_list); 1549 mutex_unlock(&g_device_mutex); 1550 1551 return 0; 1552 1553 out_free_alua: 1554 core_alua_free_lu_gp_mem(dev); 1555 out: 1556 se_release_vpd_for_dev(dev); 1557 return ret; 1558 } 1559 1560 void target_free_device(struct se_device *dev) 1561 { 1562 struct se_hba *hba = dev->se_hba; 1563 1564 WARN_ON(!list_empty(&dev->dev_sep_list)); 1565 1566 if (dev->dev_flags & DF_CONFIGURED) { 1567 destroy_workqueue(dev->tmr_wq); 1568 1569 mutex_lock(&g_device_mutex); 1570 list_del(&dev->g_dev_node); 1571 mutex_unlock(&g_device_mutex); 1572 1573 spin_lock(&hba->device_lock); 1574 hba->dev_count--; 1575 spin_unlock(&hba->device_lock); 1576 } 1577 1578 core_alua_free_lu_gp_mem(dev); 1579 core_scsi3_free_all_registrations(dev); 1580 se_release_vpd_for_dev(dev); 1581 1582 dev->transport->free_device(dev); 1583 } 1584 1585 int core_dev_setup_virtual_lun0(void) 1586 { 1587 struct se_hba *hba; 1588 struct se_device *dev; 1589 char buf[] = "rd_pages=8,rd_nullio=1"; 1590 int ret; 1591 1592 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE); 1593 if (IS_ERR(hba)) 1594 return PTR_ERR(hba); 1595 1596 dev = target_alloc_device(hba, "virt_lun0"); 1597 if (!dev) { 1598 ret = -ENOMEM; 1599 goto out_free_hba; 1600 } 1601 1602 hba->transport->set_configfs_dev_params(dev, buf, sizeof(buf)); 1603 1604 ret = target_configure_device(dev); 1605 if (ret) 1606 goto out_free_se_dev; 1607 1608 lun0_hba = hba; 1609 g_lun0_dev = dev; 1610 return 0; 1611 1612 out_free_se_dev: 1613 target_free_device(dev); 1614 out_free_hba: 1615 core_delete_hba(hba); 1616 return ret; 1617 } 1618 1619 1620 void core_dev_release_virtual_lun0(void) 1621 { 1622 struct se_hba *hba = lun0_hba; 1623 1624 if (!hba) 1625 return; 1626 1627 if (g_lun0_dev) 1628 target_free_device(g_lun0_dev); 1629 core_delete_hba(hba); 1630 } 1631