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