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 * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc. 8 * Copyright (c) 2005-2006 SBE, Inc. All Rights Reserved. 9 * Copyright (c) 2007-2010 Rising Tide Systems 10 * Copyright (c) 2008-2010 Linux-iSCSI.org 11 * 12 * Nicholas A. Bellinger <nab@kernel.org> 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License as published by 16 * the Free Software Foundation; either version 2 of the License, or 17 * (at your option) any later version. 18 * 19 * This program is distributed in the hope that it will be useful, 20 * but WITHOUT ANY WARRANTY; without even the implied warranty of 21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 22 * GNU General Public License for more details. 23 * 24 * You should have received a copy of the GNU General Public License 25 * along with this program; if not, write to the Free Software 26 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 27 * 28 ******************************************************************************/ 29 30 #include <linux/net.h> 31 #include <linux/string.h> 32 #include <linux/delay.h> 33 #include <linux/timer.h> 34 #include <linux/slab.h> 35 #include <linux/spinlock.h> 36 #include <linux/kthread.h> 37 #include <linux/in.h> 38 #include <linux/export.h> 39 #include <net/sock.h> 40 #include <net/tcp.h> 41 #include <scsi/scsi.h> 42 #include <scsi/scsi_device.h> 43 44 #include <target/target_core_base.h> 45 #include <target/target_core_backend.h> 46 #include <target/target_core_fabric.h> 47 48 #include "target_core_internal.h" 49 #include "target_core_alua.h" 50 #include "target_core_pr.h" 51 #include "target_core_ua.h" 52 53 static void se_dev_start(struct se_device *dev); 54 static void se_dev_stop(struct se_device *dev); 55 56 static struct se_hba *lun0_hba; 57 static struct se_subsystem_dev *lun0_su_dev; 58 /* not static, needed by tpg.c */ 59 struct se_device *g_lun0_dev; 60 61 int transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun) 62 { 63 struct se_lun *se_lun = NULL; 64 struct se_session *se_sess = se_cmd->se_sess; 65 struct se_device *dev; 66 unsigned long flags; 67 68 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) { 69 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN; 70 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 71 return -ENODEV; 72 } 73 74 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags); 75 se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun]; 76 if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 77 struct se_dev_entry *deve = se_cmd->se_deve; 78 79 deve->total_cmds++; 80 deve->total_bytes += se_cmd->data_length; 81 82 if ((se_cmd->data_direction == DMA_TO_DEVICE) && 83 (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) { 84 se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED; 85 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 86 pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN" 87 " Access for 0x%08x\n", 88 se_cmd->se_tfo->get_fabric_name(), 89 unpacked_lun); 90 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); 91 return -EACCES; 92 } 93 94 if (se_cmd->data_direction == DMA_TO_DEVICE) 95 deve->write_bytes += se_cmd->data_length; 96 else if (se_cmd->data_direction == DMA_FROM_DEVICE) 97 deve->read_bytes += se_cmd->data_length; 98 99 deve->deve_cmds++; 100 101 se_lun = deve->se_lun; 102 se_cmd->se_lun = deve->se_lun; 103 se_cmd->pr_res_key = deve->pr_res_key; 104 se_cmd->orig_fe_lun = unpacked_lun; 105 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; 106 } 107 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); 108 109 if (!se_lun) { 110 /* 111 * Use the se_portal_group->tpg_virt_lun0 to allow for 112 * REPORT_LUNS, et al to be returned when no active 113 * MappedLUN=0 exists for this Initiator Port. 114 */ 115 if (unpacked_lun != 0) { 116 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN; 117 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 118 pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" 119 " Access for 0x%08x\n", 120 se_cmd->se_tfo->get_fabric_name(), 121 unpacked_lun); 122 return -ENODEV; 123 } 124 /* 125 * Force WRITE PROTECT for virtual LUN 0 126 */ 127 if ((se_cmd->data_direction != DMA_FROM_DEVICE) && 128 (se_cmd->data_direction != DMA_NONE)) { 129 se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED; 130 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 131 return -EACCES; 132 } 133 134 se_lun = &se_sess->se_tpg->tpg_virt_lun0; 135 se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0; 136 se_cmd->orig_fe_lun = 0; 137 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; 138 } 139 /* 140 * Determine if the struct se_lun is online. 141 * FIXME: Check for LUN_RESET + UNIT Attention 142 */ 143 if (se_dev_check_online(se_lun->lun_se_dev) != 0) { 144 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN; 145 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 146 return -ENODEV; 147 } 148 149 /* Directly associate cmd with se_dev */ 150 se_cmd->se_dev = se_lun->lun_se_dev; 151 152 /* TODO: get rid of this and use atomics for stats */ 153 dev = se_lun->lun_se_dev; 154 spin_lock_irqsave(&dev->stats_lock, flags); 155 dev->num_cmds++; 156 if (se_cmd->data_direction == DMA_TO_DEVICE) 157 dev->write_bytes += se_cmd->data_length; 158 else if (se_cmd->data_direction == DMA_FROM_DEVICE) 159 dev->read_bytes += se_cmd->data_length; 160 spin_unlock_irqrestore(&dev->stats_lock, flags); 161 162 spin_lock_irqsave(&se_lun->lun_cmd_lock, flags); 163 list_add_tail(&se_cmd->se_lun_node, &se_lun->lun_cmd_list); 164 spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags); 165 166 return 0; 167 } 168 EXPORT_SYMBOL(transport_lookup_cmd_lun); 169 170 int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun) 171 { 172 struct se_dev_entry *deve; 173 struct se_lun *se_lun = NULL; 174 struct se_session *se_sess = se_cmd->se_sess; 175 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req; 176 unsigned long flags; 177 178 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) { 179 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN; 180 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 181 return -ENODEV; 182 } 183 184 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags); 185 se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun]; 186 deve = se_cmd->se_deve; 187 188 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 189 se_tmr->tmr_lun = deve->se_lun; 190 se_cmd->se_lun = deve->se_lun; 191 se_lun = deve->se_lun; 192 se_cmd->pr_res_key = deve->pr_res_key; 193 se_cmd->orig_fe_lun = unpacked_lun; 194 } 195 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); 196 197 if (!se_lun) { 198 pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" 199 " Access for 0x%08x\n", 200 se_cmd->se_tfo->get_fabric_name(), 201 unpacked_lun); 202 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 203 return -ENODEV; 204 } 205 /* 206 * Determine if the struct se_lun is online. 207 * FIXME: Check for LUN_RESET + UNIT Attention 208 */ 209 if (se_dev_check_online(se_lun->lun_se_dev) != 0) { 210 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 211 return -ENODEV; 212 } 213 214 /* Directly associate cmd with se_dev */ 215 se_cmd->se_dev = se_lun->lun_se_dev; 216 se_tmr->tmr_dev = se_lun->lun_se_dev; 217 218 spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags); 219 list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list); 220 spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags); 221 222 return 0; 223 } 224 EXPORT_SYMBOL(transport_lookup_tmr_lun); 225 226 /* 227 * This function is called from core_scsi3_emulate_pro_register_and_move() 228 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count 229 * when a matching rtpi is found. 230 */ 231 struct se_dev_entry *core_get_se_deve_from_rtpi( 232 struct se_node_acl *nacl, 233 u16 rtpi) 234 { 235 struct se_dev_entry *deve; 236 struct se_lun *lun; 237 struct se_port *port; 238 struct se_portal_group *tpg = nacl->se_tpg; 239 u32 i; 240 241 spin_lock_irq(&nacl->device_list_lock); 242 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 243 deve = nacl->device_list[i]; 244 245 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 246 continue; 247 248 lun = deve->se_lun; 249 if (!lun) { 250 pr_err("%s device entries device pointer is" 251 " NULL, but Initiator has access.\n", 252 tpg->se_tpg_tfo->get_fabric_name()); 253 continue; 254 } 255 port = lun->lun_sep; 256 if (!port) { 257 pr_err("%s device entries device pointer is" 258 " NULL, but Initiator has access.\n", 259 tpg->se_tpg_tfo->get_fabric_name()); 260 continue; 261 } 262 if (port->sep_rtpi != rtpi) 263 continue; 264 265 atomic_inc(&deve->pr_ref_count); 266 smp_mb__after_atomic_inc(); 267 spin_unlock_irq(&nacl->device_list_lock); 268 269 return deve; 270 } 271 spin_unlock_irq(&nacl->device_list_lock); 272 273 return NULL; 274 } 275 276 int core_free_device_list_for_node( 277 struct se_node_acl *nacl, 278 struct se_portal_group *tpg) 279 { 280 struct se_dev_entry *deve; 281 struct se_lun *lun; 282 u32 i; 283 284 if (!nacl->device_list) 285 return 0; 286 287 spin_lock_irq(&nacl->device_list_lock); 288 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 289 deve = nacl->device_list[i]; 290 291 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 292 continue; 293 294 if (!deve->se_lun) { 295 pr_err("%s device entries device pointer is" 296 " NULL, but Initiator has access.\n", 297 tpg->se_tpg_tfo->get_fabric_name()); 298 continue; 299 } 300 lun = deve->se_lun; 301 302 spin_unlock_irq(&nacl->device_list_lock); 303 core_disable_device_list_for_node(lun, NULL, deve->mapped_lun, 304 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg); 305 spin_lock_irq(&nacl->device_list_lock); 306 } 307 spin_unlock_irq(&nacl->device_list_lock); 308 309 array_free(nacl->device_list, TRANSPORT_MAX_LUNS_PER_TPG); 310 nacl->device_list = NULL; 311 312 return 0; 313 } 314 315 void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd) 316 { 317 struct se_dev_entry *deve; 318 unsigned long flags; 319 320 spin_lock_irqsave(&se_nacl->device_list_lock, flags); 321 deve = se_nacl->device_list[se_cmd->orig_fe_lun]; 322 deve->deve_cmds--; 323 spin_unlock_irqrestore(&se_nacl->device_list_lock, flags); 324 } 325 326 void core_update_device_list_access( 327 u32 mapped_lun, 328 u32 lun_access, 329 struct se_node_acl *nacl) 330 { 331 struct se_dev_entry *deve; 332 333 spin_lock_irq(&nacl->device_list_lock); 334 deve = nacl->device_list[mapped_lun]; 335 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 336 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 337 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 338 } else { 339 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 340 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 341 } 342 spin_unlock_irq(&nacl->device_list_lock); 343 } 344 345 /* core_enable_device_list_for_node(): 346 * 347 * 348 */ 349 int core_enable_device_list_for_node( 350 struct se_lun *lun, 351 struct se_lun_acl *lun_acl, 352 u32 mapped_lun, 353 u32 lun_access, 354 struct se_node_acl *nacl, 355 struct se_portal_group *tpg) 356 { 357 struct se_port *port = lun->lun_sep; 358 struct se_dev_entry *deve; 359 360 spin_lock_irq(&nacl->device_list_lock); 361 362 deve = nacl->device_list[mapped_lun]; 363 364 /* 365 * Check if the call is handling demo mode -> explict LUN ACL 366 * transition. This transition must be for the same struct se_lun 367 * + mapped_lun that was setup in demo mode.. 368 */ 369 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 370 if (deve->se_lun_acl != NULL) { 371 pr_err("struct se_dev_entry->se_lun_acl" 372 " already set for demo mode -> explict" 373 " LUN ACL transition\n"); 374 spin_unlock_irq(&nacl->device_list_lock); 375 return -EINVAL; 376 } 377 if (deve->se_lun != lun) { 378 pr_err("struct se_dev_entry->se_lun does" 379 " match passed struct se_lun for demo mode" 380 " -> explict LUN ACL transition\n"); 381 spin_unlock_irq(&nacl->device_list_lock); 382 return -EINVAL; 383 } 384 deve->se_lun_acl = lun_acl; 385 386 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 387 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 388 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 389 } else { 390 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 391 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 392 } 393 394 spin_unlock_irq(&nacl->device_list_lock); 395 return 0; 396 } 397 398 deve->se_lun = lun; 399 deve->se_lun_acl = lun_acl; 400 deve->mapped_lun = mapped_lun; 401 deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS; 402 403 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 404 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 405 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 406 } else { 407 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 408 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 409 } 410 411 deve->creation_time = get_jiffies_64(); 412 deve->attach_count++; 413 spin_unlock_irq(&nacl->device_list_lock); 414 415 spin_lock_bh(&port->sep_alua_lock); 416 list_add_tail(&deve->alua_port_list, &port->sep_alua_list); 417 spin_unlock_bh(&port->sep_alua_lock); 418 419 return 0; 420 } 421 422 /* core_disable_device_list_for_node(): 423 * 424 * 425 */ 426 int core_disable_device_list_for_node( 427 struct se_lun *lun, 428 struct se_lun_acl *lun_acl, 429 u32 mapped_lun, 430 u32 lun_access, 431 struct se_node_acl *nacl, 432 struct se_portal_group *tpg) 433 { 434 struct se_port *port = lun->lun_sep; 435 struct se_dev_entry *deve = nacl->device_list[mapped_lun]; 436 437 /* 438 * If the MappedLUN entry is being disabled, the entry in 439 * port->sep_alua_list must be removed now before clearing the 440 * struct se_dev_entry pointers below as logic in 441 * core_alua_do_transition_tg_pt() depends on these being present. 442 * 443 * deve->se_lun_acl will be NULL for demo-mode created LUNs 444 * that have not been explicitly converted to MappedLUNs -> 445 * struct se_lun_acl, but we remove deve->alua_port_list from 446 * port->sep_alua_list. This also means that active UAs and 447 * NodeACL context specific PR metadata for demo-mode 448 * MappedLUN *deve will be released below.. 449 */ 450 spin_lock_bh(&port->sep_alua_lock); 451 list_del(&deve->alua_port_list); 452 spin_unlock_bh(&port->sep_alua_lock); 453 /* 454 * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE 455 * PR operation to complete. 456 */ 457 while (atomic_read(&deve->pr_ref_count) != 0) 458 cpu_relax(); 459 460 spin_lock_irq(&nacl->device_list_lock); 461 /* 462 * Disable struct se_dev_entry LUN ACL mapping 463 */ 464 core_scsi3_ua_release_all(deve); 465 deve->se_lun = NULL; 466 deve->se_lun_acl = NULL; 467 deve->lun_flags = 0; 468 deve->creation_time = 0; 469 deve->attach_count--; 470 spin_unlock_irq(&nacl->device_list_lock); 471 472 core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl); 473 return 0; 474 } 475 476 /* core_clear_lun_from_tpg(): 477 * 478 * 479 */ 480 void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg) 481 { 482 struct se_node_acl *nacl; 483 struct se_dev_entry *deve; 484 u32 i; 485 486 spin_lock_irq(&tpg->acl_node_lock); 487 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) { 488 spin_unlock_irq(&tpg->acl_node_lock); 489 490 spin_lock_irq(&nacl->device_list_lock); 491 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 492 deve = nacl->device_list[i]; 493 if (lun != deve->se_lun) 494 continue; 495 spin_unlock_irq(&nacl->device_list_lock); 496 497 core_disable_device_list_for_node(lun, NULL, 498 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS, 499 nacl, tpg); 500 501 spin_lock_irq(&nacl->device_list_lock); 502 } 503 spin_unlock_irq(&nacl->device_list_lock); 504 505 spin_lock_irq(&tpg->acl_node_lock); 506 } 507 spin_unlock_irq(&tpg->acl_node_lock); 508 } 509 510 static struct se_port *core_alloc_port(struct se_device *dev) 511 { 512 struct se_port *port, *port_tmp; 513 514 port = kzalloc(sizeof(struct se_port), GFP_KERNEL); 515 if (!port) { 516 pr_err("Unable to allocate struct se_port\n"); 517 return ERR_PTR(-ENOMEM); 518 } 519 INIT_LIST_HEAD(&port->sep_alua_list); 520 INIT_LIST_HEAD(&port->sep_list); 521 atomic_set(&port->sep_tg_pt_secondary_offline, 0); 522 spin_lock_init(&port->sep_alua_lock); 523 mutex_init(&port->sep_tg_pt_md_mutex); 524 525 spin_lock(&dev->se_port_lock); 526 if (dev->dev_port_count == 0x0000ffff) { 527 pr_warn("Reached dev->dev_port_count ==" 528 " 0x0000ffff\n"); 529 spin_unlock(&dev->se_port_lock); 530 return ERR_PTR(-ENOSPC); 531 } 532 again: 533 /* 534 * Allocate the next RELATIVE TARGET PORT IDENTIFIER for this struct se_device 535 * Here is the table from spc4r17 section 7.7.3.8. 536 * 537 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field 538 * 539 * Code Description 540 * 0h Reserved 541 * 1h Relative port 1, historically known as port A 542 * 2h Relative port 2, historically known as port B 543 * 3h to FFFFh Relative port 3 through 65 535 544 */ 545 port->sep_rtpi = dev->dev_rpti_counter++; 546 if (!port->sep_rtpi) 547 goto again; 548 549 list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) { 550 /* 551 * Make sure RELATIVE TARGET PORT IDENTIFIER is unique 552 * for 16-bit wrap.. 553 */ 554 if (port->sep_rtpi == port_tmp->sep_rtpi) 555 goto again; 556 } 557 spin_unlock(&dev->se_port_lock); 558 559 return port; 560 } 561 562 static void core_export_port( 563 struct se_device *dev, 564 struct se_portal_group *tpg, 565 struct se_port *port, 566 struct se_lun *lun) 567 { 568 struct se_subsystem_dev *su_dev = dev->se_sub_dev; 569 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL; 570 571 spin_lock(&dev->se_port_lock); 572 spin_lock(&lun->lun_sep_lock); 573 port->sep_tpg = tpg; 574 port->sep_lun = lun; 575 lun->lun_sep = port; 576 spin_unlock(&lun->lun_sep_lock); 577 578 list_add_tail(&port->sep_list, &dev->dev_sep_list); 579 spin_unlock(&dev->se_port_lock); 580 581 if (su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) { 582 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port); 583 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) { 584 pr_err("Unable to allocate t10_alua_tg_pt" 585 "_gp_member_t\n"); 586 return; 587 } 588 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 589 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem, 590 su_dev->t10_alua.default_tg_pt_gp); 591 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 592 pr_debug("%s/%s: Adding to default ALUA Target Port" 593 " Group: alua/default_tg_pt_gp\n", 594 dev->transport->name, tpg->se_tpg_tfo->get_fabric_name()); 595 } 596 597 dev->dev_port_count++; 598 port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFIER */ 599 } 600 601 /* 602 * Called with struct se_device->se_port_lock spinlock held. 603 */ 604 static void core_release_port(struct se_device *dev, struct se_port *port) 605 __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock) 606 { 607 /* 608 * Wait for any port reference for PR ALL_TG_PT=1 operation 609 * to complete in __core_scsi3_alloc_registration() 610 */ 611 spin_unlock(&dev->se_port_lock); 612 if (atomic_read(&port->sep_tg_pt_ref_cnt)) 613 cpu_relax(); 614 spin_lock(&dev->se_port_lock); 615 616 core_alua_free_tg_pt_gp_mem(port); 617 618 list_del(&port->sep_list); 619 dev->dev_port_count--; 620 kfree(port); 621 } 622 623 int core_dev_export( 624 struct se_device *dev, 625 struct se_portal_group *tpg, 626 struct se_lun *lun) 627 { 628 struct se_port *port; 629 630 port = core_alloc_port(dev); 631 if (IS_ERR(port)) 632 return PTR_ERR(port); 633 634 lun->lun_se_dev = dev; 635 se_dev_start(dev); 636 637 atomic_inc(&dev->dev_export_obj.obj_access_count); 638 core_export_port(dev, tpg, port, lun); 639 return 0; 640 } 641 642 void core_dev_unexport( 643 struct se_device *dev, 644 struct se_portal_group *tpg, 645 struct se_lun *lun) 646 { 647 struct se_port *port = lun->lun_sep; 648 649 spin_lock(&lun->lun_sep_lock); 650 if (lun->lun_se_dev == NULL) { 651 spin_unlock(&lun->lun_sep_lock); 652 return; 653 } 654 spin_unlock(&lun->lun_sep_lock); 655 656 spin_lock(&dev->se_port_lock); 657 atomic_dec(&dev->dev_export_obj.obj_access_count); 658 core_release_port(dev, port); 659 spin_unlock(&dev->se_port_lock); 660 661 se_dev_stop(dev); 662 lun->lun_se_dev = NULL; 663 } 664 665 int target_report_luns(struct se_cmd *se_cmd) 666 { 667 struct se_dev_entry *deve; 668 struct se_session *se_sess = se_cmd->se_sess; 669 unsigned char *buf; 670 u32 lun_count = 0, offset = 8, i; 671 672 if (se_cmd->data_length < 16) { 673 pr_warn("REPORT LUNS allocation length %u too small\n", 674 se_cmd->data_length); 675 se_cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 676 return -EINVAL; 677 } 678 679 buf = transport_kmap_data_sg(se_cmd); 680 if (!buf) 681 return -ENOMEM; 682 683 /* 684 * If no struct se_session pointer is present, this struct se_cmd is 685 * coming via a target_core_mod PASSTHROUGH op, and not through 686 * a $FABRIC_MOD. In that case, report LUN=0 only. 687 */ 688 if (!se_sess) { 689 int_to_scsilun(0, (struct scsi_lun *)&buf[offset]); 690 lun_count = 1; 691 goto done; 692 } 693 694 spin_lock_irq(&se_sess->se_node_acl->device_list_lock); 695 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 696 deve = se_sess->se_node_acl->device_list[i]; 697 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 698 continue; 699 /* 700 * We determine the correct LUN LIST LENGTH even once we 701 * have reached the initial allocation length. 702 * See SPC2-R20 7.19. 703 */ 704 lun_count++; 705 if ((offset + 8) > se_cmd->data_length) 706 continue; 707 708 int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]); 709 offset += 8; 710 } 711 spin_unlock_irq(&se_sess->se_node_acl->device_list_lock); 712 713 /* 714 * See SPC3 r07, page 159. 715 */ 716 done: 717 lun_count *= 8; 718 buf[0] = ((lun_count >> 24) & 0xff); 719 buf[1] = ((lun_count >> 16) & 0xff); 720 buf[2] = ((lun_count >> 8) & 0xff); 721 buf[3] = (lun_count & 0xff); 722 transport_kunmap_data_sg(se_cmd); 723 724 target_complete_cmd(se_cmd, GOOD); 725 return 0; 726 } 727 728 /* se_release_device_for_hba(): 729 * 730 * 731 */ 732 void se_release_device_for_hba(struct se_device *dev) 733 { 734 struct se_hba *hba = dev->se_hba; 735 736 if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) || 737 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) || 738 (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) || 739 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) || 740 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED)) 741 se_dev_stop(dev); 742 743 if (dev->dev_ptr) { 744 destroy_workqueue(dev->tmr_wq); 745 if (dev->transport->free_device) 746 dev->transport->free_device(dev->dev_ptr); 747 } 748 749 spin_lock(&hba->device_lock); 750 list_del(&dev->dev_list); 751 hba->dev_count--; 752 spin_unlock(&hba->device_lock); 753 754 core_scsi3_free_all_registrations(dev); 755 se_release_vpd_for_dev(dev); 756 757 kfree(dev); 758 } 759 760 void se_release_vpd_for_dev(struct se_device *dev) 761 { 762 struct t10_vpd *vpd, *vpd_tmp; 763 764 spin_lock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock); 765 list_for_each_entry_safe(vpd, vpd_tmp, 766 &dev->se_sub_dev->t10_wwn.t10_vpd_list, vpd_list) { 767 list_del(&vpd->vpd_list); 768 kfree(vpd); 769 } 770 spin_unlock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock); 771 } 772 773 /* se_free_virtual_device(): 774 * 775 * Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers. 776 */ 777 int se_free_virtual_device(struct se_device *dev, struct se_hba *hba) 778 { 779 if (!list_empty(&dev->dev_sep_list)) 780 dump_stack(); 781 782 core_alua_free_lu_gp_mem(dev); 783 se_release_device_for_hba(dev); 784 785 return 0; 786 } 787 788 static void se_dev_start(struct se_device *dev) 789 { 790 struct se_hba *hba = dev->se_hba; 791 792 spin_lock(&hba->device_lock); 793 atomic_inc(&dev->dev_obj.obj_access_count); 794 if (atomic_read(&dev->dev_obj.obj_access_count) == 1) { 795 if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) { 796 dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED; 797 dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED; 798 } else if (dev->dev_status & 799 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) { 800 dev->dev_status &= 801 ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED; 802 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED; 803 } 804 } 805 spin_unlock(&hba->device_lock); 806 } 807 808 static void se_dev_stop(struct se_device *dev) 809 { 810 struct se_hba *hba = dev->se_hba; 811 812 spin_lock(&hba->device_lock); 813 atomic_dec(&dev->dev_obj.obj_access_count); 814 if (atomic_read(&dev->dev_obj.obj_access_count) == 0) { 815 if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) { 816 dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED; 817 dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED; 818 } else if (dev->dev_status & 819 TRANSPORT_DEVICE_OFFLINE_ACTIVATED) { 820 dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED; 821 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED; 822 } 823 } 824 spin_unlock(&hba->device_lock); 825 } 826 827 int se_dev_check_online(struct se_device *dev) 828 { 829 unsigned long flags; 830 int ret; 831 832 spin_lock_irqsave(&dev->dev_status_lock, flags); 833 ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) || 834 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1; 835 spin_unlock_irqrestore(&dev->dev_status_lock, flags); 836 837 return ret; 838 } 839 840 int se_dev_check_shutdown(struct se_device *dev) 841 { 842 int ret; 843 844 spin_lock_irq(&dev->dev_status_lock); 845 ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN); 846 spin_unlock_irq(&dev->dev_status_lock); 847 848 return ret; 849 } 850 851 static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size) 852 { 853 u32 tmp, aligned_max_sectors; 854 /* 855 * Limit max_sectors to a PAGE_SIZE aligned value for modern 856 * transport_allocate_data_tasks() operation. 857 */ 858 tmp = rounddown((max_sectors * block_size), PAGE_SIZE); 859 aligned_max_sectors = (tmp / block_size); 860 if (max_sectors != aligned_max_sectors) { 861 printk(KERN_INFO "Rounding down aligned max_sectors from %u" 862 " to %u\n", max_sectors, aligned_max_sectors); 863 return aligned_max_sectors; 864 } 865 866 return max_sectors; 867 } 868 869 void se_dev_set_default_attribs( 870 struct se_device *dev, 871 struct se_dev_limits *dev_limits) 872 { 873 struct queue_limits *limits = &dev_limits->limits; 874 875 dev->se_sub_dev->se_dev_attrib.emulate_dpo = DA_EMULATE_DPO; 876 dev->se_sub_dev->se_dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE; 877 dev->se_sub_dev->se_dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ; 878 dev->se_sub_dev->se_dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE; 879 dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL; 880 dev->se_sub_dev->se_dev_attrib.emulate_tas = DA_EMULATE_TAS; 881 dev->se_sub_dev->se_dev_attrib.emulate_tpu = DA_EMULATE_TPU; 882 dev->se_sub_dev->se_dev_attrib.emulate_tpws = DA_EMULATE_TPWS; 883 dev->se_sub_dev->se_dev_attrib.emulate_reservations = DA_EMULATE_RESERVATIONS; 884 dev->se_sub_dev->se_dev_attrib.emulate_alua = DA_EMULATE_ALUA; 885 dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS; 886 dev->se_sub_dev->se_dev_attrib.is_nonrot = DA_IS_NONROT; 887 dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD; 888 /* 889 * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK 890 * iblock_create_virtdevice() from struct queue_limits values 891 * if blk_queue_discard()==1 892 */ 893 dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT; 894 dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count = 895 DA_MAX_UNMAP_BLOCK_DESC_COUNT; 896 dev->se_sub_dev->se_dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT; 897 dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment = 898 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT; 899 /* 900 * block_size is based on subsystem plugin dependent requirements. 901 */ 902 dev->se_sub_dev->se_dev_attrib.hw_block_size = limits->logical_block_size; 903 dev->se_sub_dev->se_dev_attrib.block_size = limits->logical_block_size; 904 /* 905 * Align max_hw_sectors down to PAGE_SIZE I/O transfers 906 */ 907 limits->max_hw_sectors = se_dev_align_max_sectors(limits->max_hw_sectors, 908 limits->logical_block_size); 909 dev->se_sub_dev->se_dev_attrib.hw_max_sectors = limits->max_hw_sectors; 910 911 /* 912 * Set fabric_max_sectors, which is reported in block limits 913 * VPD page (B0h). 914 */ 915 dev->se_sub_dev->se_dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS; 916 /* 917 * Set optimal_sectors from fabric_max_sectors, which can be 918 * lowered via configfs. 919 */ 920 dev->se_sub_dev->se_dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS; 921 /* 922 * queue_depth is based on subsystem plugin dependent requirements. 923 */ 924 dev->se_sub_dev->se_dev_attrib.hw_queue_depth = dev_limits->hw_queue_depth; 925 dev->se_sub_dev->se_dev_attrib.queue_depth = dev_limits->queue_depth; 926 } 927 928 int se_dev_set_max_unmap_lba_count( 929 struct se_device *dev, 930 u32 max_unmap_lba_count) 931 { 932 dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = max_unmap_lba_count; 933 pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n", 934 dev, dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count); 935 return 0; 936 } 937 938 int se_dev_set_max_unmap_block_desc_count( 939 struct se_device *dev, 940 u32 max_unmap_block_desc_count) 941 { 942 dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count = 943 max_unmap_block_desc_count; 944 pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n", 945 dev, dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count); 946 return 0; 947 } 948 949 int se_dev_set_unmap_granularity( 950 struct se_device *dev, 951 u32 unmap_granularity) 952 { 953 dev->se_sub_dev->se_dev_attrib.unmap_granularity = unmap_granularity; 954 pr_debug("dev[%p]: Set unmap_granularity: %u\n", 955 dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity); 956 return 0; 957 } 958 959 int se_dev_set_unmap_granularity_alignment( 960 struct se_device *dev, 961 u32 unmap_granularity_alignment) 962 { 963 dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment; 964 pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n", 965 dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment); 966 return 0; 967 } 968 969 int se_dev_set_emulate_dpo(struct se_device *dev, int flag) 970 { 971 if (flag != 0 && flag != 1) { 972 pr_err("Illegal value %d\n", flag); 973 return -EINVAL; 974 } 975 976 if (flag) { 977 pr_err("dpo_emulated not supported\n"); 978 return -EINVAL; 979 } 980 981 return 0; 982 } 983 984 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag) 985 { 986 if (flag != 0 && flag != 1) { 987 pr_err("Illegal value %d\n", flag); 988 return -EINVAL; 989 } 990 991 if (flag && 992 dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 993 pr_err("emulate_fua_write not supported for pSCSI\n"); 994 return -EINVAL; 995 } 996 dev->se_sub_dev->se_dev_attrib.emulate_fua_write = flag; 997 pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n", 998 dev, dev->se_sub_dev->se_dev_attrib.emulate_fua_write); 999 return 0; 1000 } 1001 1002 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag) 1003 { 1004 if (flag != 0 && flag != 1) { 1005 pr_err("Illegal value %d\n", flag); 1006 return -EINVAL; 1007 } 1008 1009 if (flag) { 1010 pr_err("ua read emulated not supported\n"); 1011 return -EINVAL; 1012 } 1013 1014 return 0; 1015 } 1016 1017 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag) 1018 { 1019 if (flag != 0 && flag != 1) { 1020 pr_err("Illegal value %d\n", flag); 1021 return -EINVAL; 1022 } 1023 if (flag && 1024 dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1025 pr_err("emulate_write_cache not supported for pSCSI\n"); 1026 return -EINVAL; 1027 } 1028 dev->se_sub_dev->se_dev_attrib.emulate_write_cache = flag; 1029 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 1030 dev, dev->se_sub_dev->se_dev_attrib.emulate_write_cache); 1031 return 0; 1032 } 1033 1034 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag) 1035 { 1036 if ((flag != 0) && (flag != 1) && (flag != 2)) { 1037 pr_err("Illegal value %d\n", flag); 1038 return -EINVAL; 1039 } 1040 1041 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1042 pr_err("dev[%p]: Unable to change SE Device" 1043 " UA_INTRLCK_CTRL while dev_export_obj: %d count" 1044 " exists\n", dev, 1045 atomic_read(&dev->dev_export_obj.obj_access_count)); 1046 return -EINVAL; 1047 } 1048 dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = flag; 1049 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 1050 dev, dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl); 1051 1052 return 0; 1053 } 1054 1055 int se_dev_set_emulate_tas(struct se_device *dev, int flag) 1056 { 1057 if ((flag != 0) && (flag != 1)) { 1058 pr_err("Illegal value %d\n", flag); 1059 return -EINVAL; 1060 } 1061 1062 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1063 pr_err("dev[%p]: Unable to change SE Device TAS while" 1064 " dev_export_obj: %d count exists\n", dev, 1065 atomic_read(&dev->dev_export_obj.obj_access_count)); 1066 return -EINVAL; 1067 } 1068 dev->se_sub_dev->se_dev_attrib.emulate_tas = flag; 1069 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 1070 dev, (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? "Enabled" : "Disabled"); 1071 1072 return 0; 1073 } 1074 1075 int se_dev_set_emulate_tpu(struct se_device *dev, int flag) 1076 { 1077 if ((flag != 0) && (flag != 1)) { 1078 pr_err("Illegal value %d\n", flag); 1079 return -EINVAL; 1080 } 1081 /* 1082 * We expect this value to be non-zero when generic Block Layer 1083 * Discard supported is detected iblock_create_virtdevice(). 1084 */ 1085 if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) { 1086 pr_err("Generic Block Discard not supported\n"); 1087 return -ENOSYS; 1088 } 1089 1090 dev->se_sub_dev->se_dev_attrib.emulate_tpu = flag; 1091 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 1092 dev, flag); 1093 return 0; 1094 } 1095 1096 int se_dev_set_emulate_tpws(struct se_device *dev, int flag) 1097 { 1098 if ((flag != 0) && (flag != 1)) { 1099 pr_err("Illegal value %d\n", flag); 1100 return -EINVAL; 1101 } 1102 /* 1103 * We expect this value to be non-zero when generic Block Layer 1104 * Discard supported is detected iblock_create_virtdevice(). 1105 */ 1106 if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) { 1107 pr_err("Generic Block Discard not supported\n"); 1108 return -ENOSYS; 1109 } 1110 1111 dev->se_sub_dev->se_dev_attrib.emulate_tpws = flag; 1112 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 1113 dev, flag); 1114 return 0; 1115 } 1116 1117 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag) 1118 { 1119 if ((flag != 0) && (flag != 1)) { 1120 pr_err("Illegal value %d\n", flag); 1121 return -EINVAL; 1122 } 1123 dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = flag; 1124 pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev, 1125 (dev->se_sub_dev->se_dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled"); 1126 return 0; 1127 } 1128 1129 int se_dev_set_is_nonrot(struct se_device *dev, int flag) 1130 { 1131 if ((flag != 0) && (flag != 1)) { 1132 printk(KERN_ERR "Illegal value %d\n", flag); 1133 return -EINVAL; 1134 } 1135 dev->se_sub_dev->se_dev_attrib.is_nonrot = flag; 1136 pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n", 1137 dev, flag); 1138 return 0; 1139 } 1140 1141 int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag) 1142 { 1143 if (flag != 0) { 1144 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted" 1145 " reordering not implemented\n", dev); 1146 return -ENOSYS; 1147 } 1148 dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = flag; 1149 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag); 1150 return 0; 1151 } 1152 1153 /* 1154 * Note, this can only be called on unexported SE Device Object. 1155 */ 1156 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth) 1157 { 1158 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1159 pr_err("dev[%p]: Unable to change SE Device TCQ while" 1160 " dev_export_obj: %d count exists\n", dev, 1161 atomic_read(&dev->dev_export_obj.obj_access_count)); 1162 return -EINVAL; 1163 } 1164 if (!queue_depth) { 1165 pr_err("dev[%p]: Illegal ZERO value for queue" 1166 "_depth\n", dev); 1167 return -EINVAL; 1168 } 1169 1170 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1171 if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) { 1172 pr_err("dev[%p]: Passed queue_depth: %u" 1173 " exceeds TCM/SE_Device TCQ: %u\n", 1174 dev, queue_depth, 1175 dev->se_sub_dev->se_dev_attrib.hw_queue_depth); 1176 return -EINVAL; 1177 } 1178 } else { 1179 if (queue_depth > dev->se_sub_dev->se_dev_attrib.queue_depth) { 1180 if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) { 1181 pr_err("dev[%p]: Passed queue_depth:" 1182 " %u exceeds TCM/SE_Device MAX" 1183 " TCQ: %u\n", dev, queue_depth, 1184 dev->se_sub_dev->se_dev_attrib.hw_queue_depth); 1185 return -EINVAL; 1186 } 1187 } 1188 } 1189 1190 dev->se_sub_dev->se_dev_attrib.queue_depth = dev->queue_depth = queue_depth; 1191 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", 1192 dev, queue_depth); 1193 return 0; 1194 } 1195 1196 int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors) 1197 { 1198 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1199 pr_err("dev[%p]: Unable to change SE Device" 1200 " fabric_max_sectors while dev_export_obj: %d count exists\n", 1201 dev, atomic_read(&dev->dev_export_obj.obj_access_count)); 1202 return -EINVAL; 1203 } 1204 if (!fabric_max_sectors) { 1205 pr_err("dev[%p]: Illegal ZERO value for" 1206 " fabric_max_sectors\n", dev); 1207 return -EINVAL; 1208 } 1209 if (fabric_max_sectors < DA_STATUS_MAX_SECTORS_MIN) { 1210 pr_err("dev[%p]: Passed fabric_max_sectors: %u less than" 1211 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, fabric_max_sectors, 1212 DA_STATUS_MAX_SECTORS_MIN); 1213 return -EINVAL; 1214 } 1215 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1216 if (fabric_max_sectors > dev->se_sub_dev->se_dev_attrib.hw_max_sectors) { 1217 pr_err("dev[%p]: Passed fabric_max_sectors: %u" 1218 " greater than TCM/SE_Device max_sectors:" 1219 " %u\n", dev, fabric_max_sectors, 1220 dev->se_sub_dev->se_dev_attrib.hw_max_sectors); 1221 return -EINVAL; 1222 } 1223 } else { 1224 if (fabric_max_sectors > DA_STATUS_MAX_SECTORS_MAX) { 1225 pr_err("dev[%p]: Passed fabric_max_sectors: %u" 1226 " greater than DA_STATUS_MAX_SECTORS_MAX:" 1227 " %u\n", dev, fabric_max_sectors, 1228 DA_STATUS_MAX_SECTORS_MAX); 1229 return -EINVAL; 1230 } 1231 } 1232 /* 1233 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks() 1234 */ 1235 fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors, 1236 dev->se_sub_dev->se_dev_attrib.block_size); 1237 1238 dev->se_sub_dev->se_dev_attrib.fabric_max_sectors = fabric_max_sectors; 1239 pr_debug("dev[%p]: SE Device max_sectors changed to %u\n", 1240 dev, fabric_max_sectors); 1241 return 0; 1242 } 1243 1244 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors) 1245 { 1246 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1247 pr_err("dev[%p]: Unable to change SE Device" 1248 " optimal_sectors while dev_export_obj: %d count exists\n", 1249 dev, atomic_read(&dev->dev_export_obj.obj_access_count)); 1250 return -EINVAL; 1251 } 1252 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1253 pr_err("dev[%p]: Passed optimal_sectors cannot be" 1254 " changed for TCM/pSCSI\n", dev); 1255 return -EINVAL; 1256 } 1257 if (optimal_sectors > dev->se_sub_dev->se_dev_attrib.fabric_max_sectors) { 1258 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1259 " greater than fabric_max_sectors: %u\n", dev, 1260 optimal_sectors, dev->se_sub_dev->se_dev_attrib.fabric_max_sectors); 1261 return -EINVAL; 1262 } 1263 1264 dev->se_sub_dev->se_dev_attrib.optimal_sectors = optimal_sectors; 1265 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1266 dev, optimal_sectors); 1267 return 0; 1268 } 1269 1270 int se_dev_set_block_size(struct se_device *dev, u32 block_size) 1271 { 1272 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1273 pr_err("dev[%p]: Unable to change SE Device block_size" 1274 " while dev_export_obj: %d count exists\n", dev, 1275 atomic_read(&dev->dev_export_obj.obj_access_count)); 1276 return -EINVAL; 1277 } 1278 1279 if ((block_size != 512) && 1280 (block_size != 1024) && 1281 (block_size != 2048) && 1282 (block_size != 4096)) { 1283 pr_err("dev[%p]: Illegal value for block_device: %u" 1284 " for SE device, must be 512, 1024, 2048 or 4096\n", 1285 dev, block_size); 1286 return -EINVAL; 1287 } 1288 1289 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1290 pr_err("dev[%p]: Not allowed to change block_size for" 1291 " Physical Device, use for Linux/SCSI to change" 1292 " block_size for underlying hardware\n", dev); 1293 return -EINVAL; 1294 } 1295 1296 dev->se_sub_dev->se_dev_attrib.block_size = block_size; 1297 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1298 dev, block_size); 1299 return 0; 1300 } 1301 1302 struct se_lun *core_dev_add_lun( 1303 struct se_portal_group *tpg, 1304 struct se_device *dev, 1305 u32 lun) 1306 { 1307 struct se_lun *lun_p; 1308 int rc; 1309 1310 if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) { 1311 pr_err("Unable to export struct se_device while dev_access_obj: %d\n", 1312 atomic_read(&dev->dev_access_obj.obj_access_count)); 1313 return ERR_PTR(-EACCES); 1314 } 1315 1316 lun_p = core_tpg_pre_addlun(tpg, lun); 1317 if (IS_ERR(lun_p)) 1318 return lun_p; 1319 1320 rc = core_tpg_post_addlun(tpg, lun_p, 1321 TRANSPORT_LUNFLAGS_READ_WRITE, dev); 1322 if (rc < 0) 1323 return ERR_PTR(rc); 1324 1325 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from" 1326 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1327 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun_p->unpacked_lun, 1328 tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id); 1329 /* 1330 * Update LUN maps for dynamically added initiators when 1331 * generate_node_acl is enabled. 1332 */ 1333 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) { 1334 struct se_node_acl *acl; 1335 spin_lock_irq(&tpg->acl_node_lock); 1336 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { 1337 if (acl->dynamic_node_acl && 1338 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only || 1339 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) { 1340 spin_unlock_irq(&tpg->acl_node_lock); 1341 core_tpg_add_node_to_devs(acl, tpg); 1342 spin_lock_irq(&tpg->acl_node_lock); 1343 } 1344 } 1345 spin_unlock_irq(&tpg->acl_node_lock); 1346 } 1347 1348 return lun_p; 1349 } 1350 1351 /* core_dev_del_lun(): 1352 * 1353 * 1354 */ 1355 int core_dev_del_lun( 1356 struct se_portal_group *tpg, 1357 u32 unpacked_lun) 1358 { 1359 struct se_lun *lun; 1360 1361 lun = core_tpg_pre_dellun(tpg, unpacked_lun); 1362 if (IS_ERR(lun)) 1363 return PTR_ERR(lun); 1364 1365 core_tpg_post_dellun(tpg, lun); 1366 1367 pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from" 1368 " device object\n", tpg->se_tpg_tfo->get_fabric_name(), 1369 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, 1370 tpg->se_tpg_tfo->get_fabric_name()); 1371 1372 return 0; 1373 } 1374 1375 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun) 1376 { 1377 struct se_lun *lun; 1378 1379 spin_lock(&tpg->tpg_lun_lock); 1380 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1381 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS" 1382 "_PER_TPG-1: %u for Target Portal Group: %hu\n", 1383 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1384 TRANSPORT_MAX_LUNS_PER_TPG-1, 1385 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1386 spin_unlock(&tpg->tpg_lun_lock); 1387 return NULL; 1388 } 1389 lun = tpg->tpg_lun_list[unpacked_lun]; 1390 1391 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) { 1392 pr_err("%s Logical Unit Number: %u is not free on" 1393 " Target Portal Group: %hu, ignoring request.\n", 1394 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1395 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1396 spin_unlock(&tpg->tpg_lun_lock); 1397 return NULL; 1398 } 1399 spin_unlock(&tpg->tpg_lun_lock); 1400 1401 return lun; 1402 } 1403 1404 /* core_dev_get_lun(): 1405 * 1406 * 1407 */ 1408 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun) 1409 { 1410 struct se_lun *lun; 1411 1412 spin_lock(&tpg->tpg_lun_lock); 1413 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1414 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER" 1415 "_TPG-1: %u for Target Portal Group: %hu\n", 1416 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1417 TRANSPORT_MAX_LUNS_PER_TPG-1, 1418 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1419 spin_unlock(&tpg->tpg_lun_lock); 1420 return NULL; 1421 } 1422 lun = tpg->tpg_lun_list[unpacked_lun]; 1423 1424 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { 1425 pr_err("%s Logical Unit Number: %u is not active on" 1426 " Target Portal Group: %hu, ignoring request.\n", 1427 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1428 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1429 spin_unlock(&tpg->tpg_lun_lock); 1430 return NULL; 1431 } 1432 spin_unlock(&tpg->tpg_lun_lock); 1433 1434 return lun; 1435 } 1436 1437 struct se_lun_acl *core_dev_init_initiator_node_lun_acl( 1438 struct se_portal_group *tpg, 1439 u32 mapped_lun, 1440 char *initiatorname, 1441 int *ret) 1442 { 1443 struct se_lun_acl *lacl; 1444 struct se_node_acl *nacl; 1445 1446 if (strlen(initiatorname) >= TRANSPORT_IQN_LEN) { 1447 pr_err("%s InitiatorName exceeds maximum size.\n", 1448 tpg->se_tpg_tfo->get_fabric_name()); 1449 *ret = -EOVERFLOW; 1450 return NULL; 1451 } 1452 nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname); 1453 if (!nacl) { 1454 *ret = -EINVAL; 1455 return NULL; 1456 } 1457 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL); 1458 if (!lacl) { 1459 pr_err("Unable to allocate memory for struct se_lun_acl.\n"); 1460 *ret = -ENOMEM; 1461 return NULL; 1462 } 1463 1464 INIT_LIST_HEAD(&lacl->lacl_list); 1465 lacl->mapped_lun = mapped_lun; 1466 lacl->se_lun_nacl = nacl; 1467 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); 1468 1469 return lacl; 1470 } 1471 1472 int core_dev_add_initiator_node_lun_acl( 1473 struct se_portal_group *tpg, 1474 struct se_lun_acl *lacl, 1475 u32 unpacked_lun, 1476 u32 lun_access) 1477 { 1478 struct se_lun *lun; 1479 struct se_node_acl *nacl; 1480 1481 lun = core_dev_get_lun(tpg, unpacked_lun); 1482 if (!lun) { 1483 pr_err("%s Logical Unit Number: %u is not active on" 1484 " Target Portal Group: %hu, ignoring request.\n", 1485 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1486 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1487 return -EINVAL; 1488 } 1489 1490 nacl = lacl->se_lun_nacl; 1491 if (!nacl) 1492 return -EINVAL; 1493 1494 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) && 1495 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE)) 1496 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; 1497 1498 lacl->se_lun = lun; 1499 1500 if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun, 1501 lun_access, nacl, tpg) < 0) 1502 return -EINVAL; 1503 1504 spin_lock(&lun->lun_acl_lock); 1505 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list); 1506 atomic_inc(&lun->lun_acl_count); 1507 smp_mb__after_atomic_inc(); 1508 spin_unlock(&lun->lun_acl_lock); 1509 1510 pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for " 1511 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(), 1512 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun, 1513 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO", 1514 lacl->initiatorname); 1515 /* 1516 * Check to see if there are any existing persistent reservation APTPL 1517 * pre-registrations that need to be enabled for this LUN ACL.. 1518 */ 1519 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl); 1520 return 0; 1521 } 1522 1523 /* core_dev_del_initiator_node_lun_acl(): 1524 * 1525 * 1526 */ 1527 int core_dev_del_initiator_node_lun_acl( 1528 struct se_portal_group *tpg, 1529 struct se_lun *lun, 1530 struct se_lun_acl *lacl) 1531 { 1532 struct se_node_acl *nacl; 1533 1534 nacl = lacl->se_lun_nacl; 1535 if (!nacl) 1536 return -EINVAL; 1537 1538 spin_lock(&lun->lun_acl_lock); 1539 list_del(&lacl->lacl_list); 1540 atomic_dec(&lun->lun_acl_count); 1541 smp_mb__after_atomic_dec(); 1542 spin_unlock(&lun->lun_acl_lock); 1543 1544 core_disable_device_list_for_node(lun, NULL, lacl->mapped_lun, 1545 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg); 1546 1547 lacl->se_lun = NULL; 1548 1549 pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for" 1550 " InitiatorNode: %s Mapped LUN: %u\n", 1551 tpg->se_tpg_tfo->get_fabric_name(), 1552 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, 1553 lacl->initiatorname, lacl->mapped_lun); 1554 1555 return 0; 1556 } 1557 1558 void core_dev_free_initiator_node_lun_acl( 1559 struct se_portal_group *tpg, 1560 struct se_lun_acl *lacl) 1561 { 1562 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s" 1563 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1564 tpg->se_tpg_tfo->tpg_get_tag(tpg), 1565 tpg->se_tpg_tfo->get_fabric_name(), 1566 lacl->initiatorname, lacl->mapped_lun); 1567 1568 kfree(lacl); 1569 } 1570 1571 int core_dev_setup_virtual_lun0(void) 1572 { 1573 struct se_hba *hba; 1574 struct se_device *dev; 1575 struct se_subsystem_dev *se_dev = NULL; 1576 struct se_subsystem_api *t; 1577 char buf[16]; 1578 int ret; 1579 1580 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE); 1581 if (IS_ERR(hba)) 1582 return PTR_ERR(hba); 1583 1584 lun0_hba = hba; 1585 t = hba->transport; 1586 1587 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL); 1588 if (!se_dev) { 1589 pr_err("Unable to allocate memory for" 1590 " struct se_subsystem_dev\n"); 1591 ret = -ENOMEM; 1592 goto out; 1593 } 1594 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list); 1595 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock); 1596 INIT_LIST_HEAD(&se_dev->t10_pr.registration_list); 1597 INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list); 1598 spin_lock_init(&se_dev->t10_pr.registration_lock); 1599 spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock); 1600 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list); 1601 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock); 1602 spin_lock_init(&se_dev->se_dev_lock); 1603 se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN; 1604 se_dev->t10_wwn.t10_sub_dev = se_dev; 1605 se_dev->t10_alua.t10_sub_dev = se_dev; 1606 se_dev->se_dev_attrib.da_sub_dev = se_dev; 1607 se_dev->se_dev_hba = hba; 1608 1609 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0"); 1610 if (!se_dev->se_dev_su_ptr) { 1611 pr_err("Unable to locate subsystem dependent pointer" 1612 " from allocate_virtdevice()\n"); 1613 ret = -ENOMEM; 1614 goto out; 1615 } 1616 lun0_su_dev = se_dev; 1617 1618 memset(buf, 0, 16); 1619 sprintf(buf, "rd_pages=8"); 1620 t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf)); 1621 1622 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr); 1623 if (IS_ERR(dev)) { 1624 ret = PTR_ERR(dev); 1625 goto out; 1626 } 1627 se_dev->se_dev_ptr = dev; 1628 g_lun0_dev = dev; 1629 1630 return 0; 1631 out: 1632 lun0_su_dev = NULL; 1633 kfree(se_dev); 1634 if (lun0_hba) { 1635 core_delete_hba(lun0_hba); 1636 lun0_hba = NULL; 1637 } 1638 return ret; 1639 } 1640 1641 1642 void core_dev_release_virtual_lun0(void) 1643 { 1644 struct se_hba *hba = lun0_hba; 1645 struct se_subsystem_dev *su_dev = lun0_su_dev; 1646 1647 if (!hba) 1648 return; 1649 1650 if (g_lun0_dev) 1651 se_free_virtual_device(g_lun0_dev, hba); 1652 1653 kfree(su_dev); 1654 core_delete_hba(hba); 1655 } 1656