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 IDENTIFER 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 IDENTIFER 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 IDENTIFER */ 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 buf = transport_kmap_data_sg(se_cmd); 673 if (!buf) 674 return -ENOMEM; 675 676 /* 677 * If no struct se_session pointer is present, this struct se_cmd is 678 * coming via a target_core_mod PASSTHROUGH op, and not through 679 * a $FABRIC_MOD. In that case, report LUN=0 only. 680 */ 681 if (!se_sess) { 682 int_to_scsilun(0, (struct scsi_lun *)&buf[offset]); 683 lun_count = 1; 684 goto done; 685 } 686 687 spin_lock_irq(&se_sess->se_node_acl->device_list_lock); 688 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 689 deve = se_sess->se_node_acl->device_list[i]; 690 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 691 continue; 692 /* 693 * We determine the correct LUN LIST LENGTH even once we 694 * have reached the initial allocation length. 695 * See SPC2-R20 7.19. 696 */ 697 lun_count++; 698 if ((offset + 8) > se_cmd->data_length) 699 continue; 700 701 int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]); 702 offset += 8; 703 } 704 spin_unlock_irq(&se_sess->se_node_acl->device_list_lock); 705 706 /* 707 * See SPC3 r07, page 159. 708 */ 709 done: 710 lun_count *= 8; 711 buf[0] = ((lun_count >> 24) & 0xff); 712 buf[1] = ((lun_count >> 16) & 0xff); 713 buf[2] = ((lun_count >> 8) & 0xff); 714 buf[3] = (lun_count & 0xff); 715 transport_kunmap_data_sg(se_cmd); 716 717 target_complete_cmd(se_cmd, GOOD); 718 return 0; 719 } 720 721 /* se_release_device_for_hba(): 722 * 723 * 724 */ 725 void se_release_device_for_hba(struct se_device *dev) 726 { 727 struct se_hba *hba = dev->se_hba; 728 729 if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) || 730 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) || 731 (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) || 732 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) || 733 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED)) 734 se_dev_stop(dev); 735 736 if (dev->dev_ptr) { 737 destroy_workqueue(dev->tmr_wq); 738 if (dev->transport->free_device) 739 dev->transport->free_device(dev->dev_ptr); 740 } 741 742 spin_lock(&hba->device_lock); 743 list_del(&dev->dev_list); 744 hba->dev_count--; 745 spin_unlock(&hba->device_lock); 746 747 core_scsi3_free_all_registrations(dev); 748 se_release_vpd_for_dev(dev); 749 750 kfree(dev); 751 } 752 753 void se_release_vpd_for_dev(struct se_device *dev) 754 { 755 struct t10_vpd *vpd, *vpd_tmp; 756 757 spin_lock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock); 758 list_for_each_entry_safe(vpd, vpd_tmp, 759 &dev->se_sub_dev->t10_wwn.t10_vpd_list, vpd_list) { 760 list_del(&vpd->vpd_list); 761 kfree(vpd); 762 } 763 spin_unlock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock); 764 } 765 766 /* se_free_virtual_device(): 767 * 768 * Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers. 769 */ 770 int se_free_virtual_device(struct se_device *dev, struct se_hba *hba) 771 { 772 if (!list_empty(&dev->dev_sep_list)) 773 dump_stack(); 774 775 core_alua_free_lu_gp_mem(dev); 776 se_release_device_for_hba(dev); 777 778 return 0; 779 } 780 781 static void se_dev_start(struct se_device *dev) 782 { 783 struct se_hba *hba = dev->se_hba; 784 785 spin_lock(&hba->device_lock); 786 atomic_inc(&dev->dev_obj.obj_access_count); 787 if (atomic_read(&dev->dev_obj.obj_access_count) == 1) { 788 if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) { 789 dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED; 790 dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED; 791 } else if (dev->dev_status & 792 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) { 793 dev->dev_status &= 794 ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED; 795 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED; 796 } 797 } 798 spin_unlock(&hba->device_lock); 799 } 800 801 static void se_dev_stop(struct se_device *dev) 802 { 803 struct se_hba *hba = dev->se_hba; 804 805 spin_lock(&hba->device_lock); 806 atomic_dec(&dev->dev_obj.obj_access_count); 807 if (atomic_read(&dev->dev_obj.obj_access_count) == 0) { 808 if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) { 809 dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED; 810 dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED; 811 } else if (dev->dev_status & 812 TRANSPORT_DEVICE_OFFLINE_ACTIVATED) { 813 dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED; 814 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED; 815 } 816 } 817 spin_unlock(&hba->device_lock); 818 } 819 820 int se_dev_check_online(struct se_device *dev) 821 { 822 unsigned long flags; 823 int ret; 824 825 spin_lock_irqsave(&dev->dev_status_lock, flags); 826 ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) || 827 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1; 828 spin_unlock_irqrestore(&dev->dev_status_lock, flags); 829 830 return ret; 831 } 832 833 int se_dev_check_shutdown(struct se_device *dev) 834 { 835 int ret; 836 837 spin_lock_irq(&dev->dev_status_lock); 838 ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN); 839 spin_unlock_irq(&dev->dev_status_lock); 840 841 return ret; 842 } 843 844 static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size) 845 { 846 u32 tmp, aligned_max_sectors; 847 /* 848 * Limit max_sectors to a PAGE_SIZE aligned value for modern 849 * transport_allocate_data_tasks() operation. 850 */ 851 tmp = rounddown((max_sectors * block_size), PAGE_SIZE); 852 aligned_max_sectors = (tmp / block_size); 853 if (max_sectors != aligned_max_sectors) { 854 printk(KERN_INFO "Rounding down aligned max_sectors from %u" 855 " to %u\n", max_sectors, aligned_max_sectors); 856 return aligned_max_sectors; 857 } 858 859 return max_sectors; 860 } 861 862 void se_dev_set_default_attribs( 863 struct se_device *dev, 864 struct se_dev_limits *dev_limits) 865 { 866 struct queue_limits *limits = &dev_limits->limits; 867 868 dev->se_sub_dev->se_dev_attrib.emulate_dpo = DA_EMULATE_DPO; 869 dev->se_sub_dev->se_dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE; 870 dev->se_sub_dev->se_dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ; 871 dev->se_sub_dev->se_dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE; 872 dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL; 873 dev->se_sub_dev->se_dev_attrib.emulate_tas = DA_EMULATE_TAS; 874 dev->se_sub_dev->se_dev_attrib.emulate_tpu = DA_EMULATE_TPU; 875 dev->se_sub_dev->se_dev_attrib.emulate_tpws = DA_EMULATE_TPWS; 876 dev->se_sub_dev->se_dev_attrib.emulate_reservations = DA_EMULATE_RESERVATIONS; 877 dev->se_sub_dev->se_dev_attrib.emulate_alua = DA_EMULATE_ALUA; 878 dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS; 879 dev->se_sub_dev->se_dev_attrib.is_nonrot = DA_IS_NONROT; 880 dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD; 881 /* 882 * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK 883 * iblock_create_virtdevice() from struct queue_limits values 884 * if blk_queue_discard()==1 885 */ 886 dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT; 887 dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count = 888 DA_MAX_UNMAP_BLOCK_DESC_COUNT; 889 dev->se_sub_dev->se_dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT; 890 dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment = 891 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT; 892 /* 893 * block_size is based on subsystem plugin dependent requirements. 894 */ 895 dev->se_sub_dev->se_dev_attrib.hw_block_size = limits->logical_block_size; 896 dev->se_sub_dev->se_dev_attrib.block_size = limits->logical_block_size; 897 /* 898 * Align max_hw_sectors down to PAGE_SIZE I/O transfers 899 */ 900 limits->max_hw_sectors = se_dev_align_max_sectors(limits->max_hw_sectors, 901 limits->logical_block_size); 902 dev->se_sub_dev->se_dev_attrib.hw_max_sectors = limits->max_hw_sectors; 903 904 /* 905 * Set fabric_max_sectors, which is reported in block limits 906 * VPD page (B0h). 907 */ 908 dev->se_sub_dev->se_dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS; 909 /* 910 * Set optimal_sectors from fabric_max_sectors, which can be 911 * lowered via configfs. 912 */ 913 dev->se_sub_dev->se_dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS; 914 /* 915 * queue_depth is based on subsystem plugin dependent requirements. 916 */ 917 dev->se_sub_dev->se_dev_attrib.hw_queue_depth = dev_limits->hw_queue_depth; 918 dev->se_sub_dev->se_dev_attrib.queue_depth = dev_limits->queue_depth; 919 } 920 921 int se_dev_set_max_unmap_lba_count( 922 struct se_device *dev, 923 u32 max_unmap_lba_count) 924 { 925 dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = max_unmap_lba_count; 926 pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n", 927 dev, dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count); 928 return 0; 929 } 930 931 int se_dev_set_max_unmap_block_desc_count( 932 struct se_device *dev, 933 u32 max_unmap_block_desc_count) 934 { 935 dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count = 936 max_unmap_block_desc_count; 937 pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n", 938 dev, dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count); 939 return 0; 940 } 941 942 int se_dev_set_unmap_granularity( 943 struct se_device *dev, 944 u32 unmap_granularity) 945 { 946 dev->se_sub_dev->se_dev_attrib.unmap_granularity = unmap_granularity; 947 pr_debug("dev[%p]: Set unmap_granularity: %u\n", 948 dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity); 949 return 0; 950 } 951 952 int se_dev_set_unmap_granularity_alignment( 953 struct se_device *dev, 954 u32 unmap_granularity_alignment) 955 { 956 dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment; 957 pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n", 958 dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment); 959 return 0; 960 } 961 962 int se_dev_set_emulate_dpo(struct se_device *dev, int flag) 963 { 964 if (flag != 0 && flag != 1) { 965 pr_err("Illegal value %d\n", flag); 966 return -EINVAL; 967 } 968 969 if (flag) { 970 pr_err("dpo_emulated not supported\n"); 971 return -EINVAL; 972 } 973 974 return 0; 975 } 976 977 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag) 978 { 979 if (flag != 0 && flag != 1) { 980 pr_err("Illegal value %d\n", flag); 981 return -EINVAL; 982 } 983 984 if (flag && dev->transport->fua_write_emulated == 0) { 985 pr_err("fua_write_emulated not supported\n"); 986 return -EINVAL; 987 } 988 dev->se_sub_dev->se_dev_attrib.emulate_fua_write = flag; 989 pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n", 990 dev, dev->se_sub_dev->se_dev_attrib.emulate_fua_write); 991 return 0; 992 } 993 994 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag) 995 { 996 if (flag != 0 && flag != 1) { 997 pr_err("Illegal value %d\n", flag); 998 return -EINVAL; 999 } 1000 1001 if (flag) { 1002 pr_err("ua read emulated not supported\n"); 1003 return -EINVAL; 1004 } 1005 1006 return 0; 1007 } 1008 1009 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag) 1010 { 1011 if (flag != 0 && flag != 1) { 1012 pr_err("Illegal value %d\n", flag); 1013 return -EINVAL; 1014 } 1015 if (flag && dev->transport->write_cache_emulated == 0) { 1016 pr_err("write_cache_emulated not supported\n"); 1017 return -EINVAL; 1018 } 1019 dev->se_sub_dev->se_dev_attrib.emulate_write_cache = flag; 1020 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 1021 dev, dev->se_sub_dev->se_dev_attrib.emulate_write_cache); 1022 return 0; 1023 } 1024 1025 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag) 1026 { 1027 if ((flag != 0) && (flag != 1) && (flag != 2)) { 1028 pr_err("Illegal value %d\n", flag); 1029 return -EINVAL; 1030 } 1031 1032 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1033 pr_err("dev[%p]: Unable to change SE Device" 1034 " UA_INTRLCK_CTRL while dev_export_obj: %d count" 1035 " exists\n", dev, 1036 atomic_read(&dev->dev_export_obj.obj_access_count)); 1037 return -EINVAL; 1038 } 1039 dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = flag; 1040 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 1041 dev, dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl); 1042 1043 return 0; 1044 } 1045 1046 int se_dev_set_emulate_tas(struct se_device *dev, int flag) 1047 { 1048 if ((flag != 0) && (flag != 1)) { 1049 pr_err("Illegal value %d\n", flag); 1050 return -EINVAL; 1051 } 1052 1053 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1054 pr_err("dev[%p]: Unable to change SE Device TAS while" 1055 " dev_export_obj: %d count exists\n", dev, 1056 atomic_read(&dev->dev_export_obj.obj_access_count)); 1057 return -EINVAL; 1058 } 1059 dev->se_sub_dev->se_dev_attrib.emulate_tas = flag; 1060 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 1061 dev, (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? "Enabled" : "Disabled"); 1062 1063 return 0; 1064 } 1065 1066 int se_dev_set_emulate_tpu(struct se_device *dev, int flag) 1067 { 1068 if ((flag != 0) && (flag != 1)) { 1069 pr_err("Illegal value %d\n", flag); 1070 return -EINVAL; 1071 } 1072 /* 1073 * We expect this value to be non-zero when generic Block Layer 1074 * Discard supported is detected iblock_create_virtdevice(). 1075 */ 1076 if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) { 1077 pr_err("Generic Block Discard not supported\n"); 1078 return -ENOSYS; 1079 } 1080 1081 dev->se_sub_dev->se_dev_attrib.emulate_tpu = flag; 1082 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 1083 dev, flag); 1084 return 0; 1085 } 1086 1087 int se_dev_set_emulate_tpws(struct se_device *dev, int flag) 1088 { 1089 if ((flag != 0) && (flag != 1)) { 1090 pr_err("Illegal value %d\n", flag); 1091 return -EINVAL; 1092 } 1093 /* 1094 * We expect this value to be non-zero when generic Block Layer 1095 * Discard supported is detected iblock_create_virtdevice(). 1096 */ 1097 if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) { 1098 pr_err("Generic Block Discard not supported\n"); 1099 return -ENOSYS; 1100 } 1101 1102 dev->se_sub_dev->se_dev_attrib.emulate_tpws = flag; 1103 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 1104 dev, flag); 1105 return 0; 1106 } 1107 1108 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag) 1109 { 1110 if ((flag != 0) && (flag != 1)) { 1111 pr_err("Illegal value %d\n", flag); 1112 return -EINVAL; 1113 } 1114 dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = flag; 1115 pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev, 1116 (dev->se_sub_dev->se_dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled"); 1117 return 0; 1118 } 1119 1120 int se_dev_set_is_nonrot(struct se_device *dev, int flag) 1121 { 1122 if ((flag != 0) && (flag != 1)) { 1123 printk(KERN_ERR "Illegal value %d\n", flag); 1124 return -EINVAL; 1125 } 1126 dev->se_sub_dev->se_dev_attrib.is_nonrot = flag; 1127 pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n", 1128 dev, flag); 1129 return 0; 1130 } 1131 1132 int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag) 1133 { 1134 if (flag != 0) { 1135 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted" 1136 " reordering not implemented\n", dev); 1137 return -ENOSYS; 1138 } 1139 dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = flag; 1140 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag); 1141 return 0; 1142 } 1143 1144 /* 1145 * Note, this can only be called on unexported SE Device Object. 1146 */ 1147 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth) 1148 { 1149 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1150 pr_err("dev[%p]: Unable to change SE Device TCQ while" 1151 " dev_export_obj: %d count exists\n", dev, 1152 atomic_read(&dev->dev_export_obj.obj_access_count)); 1153 return -EINVAL; 1154 } 1155 if (!queue_depth) { 1156 pr_err("dev[%p]: Illegal ZERO value for queue" 1157 "_depth\n", dev); 1158 return -EINVAL; 1159 } 1160 1161 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1162 if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) { 1163 pr_err("dev[%p]: Passed queue_depth: %u" 1164 " exceeds TCM/SE_Device TCQ: %u\n", 1165 dev, queue_depth, 1166 dev->se_sub_dev->se_dev_attrib.hw_queue_depth); 1167 return -EINVAL; 1168 } 1169 } else { 1170 if (queue_depth > dev->se_sub_dev->se_dev_attrib.queue_depth) { 1171 if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) { 1172 pr_err("dev[%p]: Passed queue_depth:" 1173 " %u exceeds TCM/SE_Device MAX" 1174 " TCQ: %u\n", dev, queue_depth, 1175 dev->se_sub_dev->se_dev_attrib.hw_queue_depth); 1176 return -EINVAL; 1177 } 1178 } 1179 } 1180 1181 dev->se_sub_dev->se_dev_attrib.queue_depth = dev->queue_depth = queue_depth; 1182 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", 1183 dev, queue_depth); 1184 return 0; 1185 } 1186 1187 int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors) 1188 { 1189 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1190 pr_err("dev[%p]: Unable to change SE Device" 1191 " fabric_max_sectors while dev_export_obj: %d count exists\n", 1192 dev, atomic_read(&dev->dev_export_obj.obj_access_count)); 1193 return -EINVAL; 1194 } 1195 if (!fabric_max_sectors) { 1196 pr_err("dev[%p]: Illegal ZERO value for" 1197 " fabric_max_sectors\n", dev); 1198 return -EINVAL; 1199 } 1200 if (fabric_max_sectors < DA_STATUS_MAX_SECTORS_MIN) { 1201 pr_err("dev[%p]: Passed fabric_max_sectors: %u less than" 1202 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, fabric_max_sectors, 1203 DA_STATUS_MAX_SECTORS_MIN); 1204 return -EINVAL; 1205 } 1206 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1207 if (fabric_max_sectors > dev->se_sub_dev->se_dev_attrib.hw_max_sectors) { 1208 pr_err("dev[%p]: Passed fabric_max_sectors: %u" 1209 " greater than TCM/SE_Device max_sectors:" 1210 " %u\n", dev, fabric_max_sectors, 1211 dev->se_sub_dev->se_dev_attrib.hw_max_sectors); 1212 return -EINVAL; 1213 } 1214 } else { 1215 if (fabric_max_sectors > DA_STATUS_MAX_SECTORS_MAX) { 1216 pr_err("dev[%p]: Passed fabric_max_sectors: %u" 1217 " greater than DA_STATUS_MAX_SECTORS_MAX:" 1218 " %u\n", dev, fabric_max_sectors, 1219 DA_STATUS_MAX_SECTORS_MAX); 1220 return -EINVAL; 1221 } 1222 } 1223 /* 1224 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks() 1225 */ 1226 fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors, 1227 dev->se_sub_dev->se_dev_attrib.block_size); 1228 1229 dev->se_sub_dev->se_dev_attrib.fabric_max_sectors = fabric_max_sectors; 1230 pr_debug("dev[%p]: SE Device max_sectors changed to %u\n", 1231 dev, fabric_max_sectors); 1232 return 0; 1233 } 1234 1235 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors) 1236 { 1237 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1238 pr_err("dev[%p]: Unable to change SE Device" 1239 " optimal_sectors while dev_export_obj: %d count exists\n", 1240 dev, atomic_read(&dev->dev_export_obj.obj_access_count)); 1241 return -EINVAL; 1242 } 1243 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1244 pr_err("dev[%p]: Passed optimal_sectors cannot be" 1245 " changed for TCM/pSCSI\n", dev); 1246 return -EINVAL; 1247 } 1248 if (optimal_sectors > dev->se_sub_dev->se_dev_attrib.fabric_max_sectors) { 1249 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1250 " greater than fabric_max_sectors: %u\n", dev, 1251 optimal_sectors, dev->se_sub_dev->se_dev_attrib.fabric_max_sectors); 1252 return -EINVAL; 1253 } 1254 1255 dev->se_sub_dev->se_dev_attrib.optimal_sectors = optimal_sectors; 1256 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1257 dev, optimal_sectors); 1258 return 0; 1259 } 1260 1261 int se_dev_set_block_size(struct se_device *dev, u32 block_size) 1262 { 1263 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1264 pr_err("dev[%p]: Unable to change SE Device block_size" 1265 " while dev_export_obj: %d count exists\n", dev, 1266 atomic_read(&dev->dev_export_obj.obj_access_count)); 1267 return -EINVAL; 1268 } 1269 1270 if ((block_size != 512) && 1271 (block_size != 1024) && 1272 (block_size != 2048) && 1273 (block_size != 4096)) { 1274 pr_err("dev[%p]: Illegal value for block_device: %u" 1275 " for SE device, must be 512, 1024, 2048 or 4096\n", 1276 dev, block_size); 1277 return -EINVAL; 1278 } 1279 1280 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1281 pr_err("dev[%p]: Not allowed to change block_size for" 1282 " Physical Device, use for Linux/SCSI to change" 1283 " block_size for underlying hardware\n", dev); 1284 return -EINVAL; 1285 } 1286 1287 dev->se_sub_dev->se_dev_attrib.block_size = block_size; 1288 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1289 dev, block_size); 1290 return 0; 1291 } 1292 1293 struct se_lun *core_dev_add_lun( 1294 struct se_portal_group *tpg, 1295 struct se_device *dev, 1296 u32 lun) 1297 { 1298 struct se_lun *lun_p; 1299 int rc; 1300 1301 if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) { 1302 pr_err("Unable to export struct se_device while dev_access_obj: %d\n", 1303 atomic_read(&dev->dev_access_obj.obj_access_count)); 1304 return ERR_PTR(-EACCES); 1305 } 1306 1307 lun_p = core_tpg_pre_addlun(tpg, lun); 1308 if (IS_ERR(lun_p)) 1309 return lun_p; 1310 1311 rc = core_tpg_post_addlun(tpg, lun_p, 1312 TRANSPORT_LUNFLAGS_READ_WRITE, dev); 1313 if (rc < 0) 1314 return ERR_PTR(rc); 1315 1316 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from" 1317 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1318 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun_p->unpacked_lun, 1319 tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id); 1320 /* 1321 * Update LUN maps for dynamically added initiators when 1322 * generate_node_acl is enabled. 1323 */ 1324 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) { 1325 struct se_node_acl *acl; 1326 spin_lock_irq(&tpg->acl_node_lock); 1327 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { 1328 if (acl->dynamic_node_acl && 1329 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only || 1330 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) { 1331 spin_unlock_irq(&tpg->acl_node_lock); 1332 core_tpg_add_node_to_devs(acl, tpg); 1333 spin_lock_irq(&tpg->acl_node_lock); 1334 } 1335 } 1336 spin_unlock_irq(&tpg->acl_node_lock); 1337 } 1338 1339 return lun_p; 1340 } 1341 1342 /* core_dev_del_lun(): 1343 * 1344 * 1345 */ 1346 int core_dev_del_lun( 1347 struct se_portal_group *tpg, 1348 u32 unpacked_lun) 1349 { 1350 struct se_lun *lun; 1351 1352 lun = core_tpg_pre_dellun(tpg, unpacked_lun); 1353 if (IS_ERR(lun)) 1354 return PTR_ERR(lun); 1355 1356 core_tpg_post_dellun(tpg, lun); 1357 1358 pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from" 1359 " device object\n", tpg->se_tpg_tfo->get_fabric_name(), 1360 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, 1361 tpg->se_tpg_tfo->get_fabric_name()); 1362 1363 return 0; 1364 } 1365 1366 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun) 1367 { 1368 struct se_lun *lun; 1369 1370 spin_lock(&tpg->tpg_lun_lock); 1371 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1372 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS" 1373 "_PER_TPG-1: %u for Target Portal Group: %hu\n", 1374 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1375 TRANSPORT_MAX_LUNS_PER_TPG-1, 1376 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1377 spin_unlock(&tpg->tpg_lun_lock); 1378 return NULL; 1379 } 1380 lun = tpg->tpg_lun_list[unpacked_lun]; 1381 1382 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) { 1383 pr_err("%s Logical Unit Number: %u is not free on" 1384 " Target Portal Group: %hu, ignoring request.\n", 1385 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1386 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1387 spin_unlock(&tpg->tpg_lun_lock); 1388 return NULL; 1389 } 1390 spin_unlock(&tpg->tpg_lun_lock); 1391 1392 return lun; 1393 } 1394 1395 /* core_dev_get_lun(): 1396 * 1397 * 1398 */ 1399 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun) 1400 { 1401 struct se_lun *lun; 1402 1403 spin_lock(&tpg->tpg_lun_lock); 1404 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1405 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER" 1406 "_TPG-1: %u for Target Portal Group: %hu\n", 1407 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1408 TRANSPORT_MAX_LUNS_PER_TPG-1, 1409 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1410 spin_unlock(&tpg->tpg_lun_lock); 1411 return NULL; 1412 } 1413 lun = tpg->tpg_lun_list[unpacked_lun]; 1414 1415 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { 1416 pr_err("%s Logical Unit Number: %u is not active on" 1417 " Target Portal Group: %hu, ignoring request.\n", 1418 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1419 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1420 spin_unlock(&tpg->tpg_lun_lock); 1421 return NULL; 1422 } 1423 spin_unlock(&tpg->tpg_lun_lock); 1424 1425 return lun; 1426 } 1427 1428 struct se_lun_acl *core_dev_init_initiator_node_lun_acl( 1429 struct se_portal_group *tpg, 1430 u32 mapped_lun, 1431 char *initiatorname, 1432 int *ret) 1433 { 1434 struct se_lun_acl *lacl; 1435 struct se_node_acl *nacl; 1436 1437 if (strlen(initiatorname) >= TRANSPORT_IQN_LEN) { 1438 pr_err("%s InitiatorName exceeds maximum size.\n", 1439 tpg->se_tpg_tfo->get_fabric_name()); 1440 *ret = -EOVERFLOW; 1441 return NULL; 1442 } 1443 nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname); 1444 if (!nacl) { 1445 *ret = -EINVAL; 1446 return NULL; 1447 } 1448 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL); 1449 if (!lacl) { 1450 pr_err("Unable to allocate memory for struct se_lun_acl.\n"); 1451 *ret = -ENOMEM; 1452 return NULL; 1453 } 1454 1455 INIT_LIST_HEAD(&lacl->lacl_list); 1456 lacl->mapped_lun = mapped_lun; 1457 lacl->se_lun_nacl = nacl; 1458 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); 1459 1460 return lacl; 1461 } 1462 1463 int core_dev_add_initiator_node_lun_acl( 1464 struct se_portal_group *tpg, 1465 struct se_lun_acl *lacl, 1466 u32 unpacked_lun, 1467 u32 lun_access) 1468 { 1469 struct se_lun *lun; 1470 struct se_node_acl *nacl; 1471 1472 lun = core_dev_get_lun(tpg, unpacked_lun); 1473 if (!lun) { 1474 pr_err("%s Logical Unit Number: %u is not active on" 1475 " Target Portal Group: %hu, ignoring request.\n", 1476 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1477 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1478 return -EINVAL; 1479 } 1480 1481 nacl = lacl->se_lun_nacl; 1482 if (!nacl) 1483 return -EINVAL; 1484 1485 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) && 1486 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE)) 1487 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; 1488 1489 lacl->se_lun = lun; 1490 1491 if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun, 1492 lun_access, nacl, tpg) < 0) 1493 return -EINVAL; 1494 1495 spin_lock(&lun->lun_acl_lock); 1496 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list); 1497 atomic_inc(&lun->lun_acl_count); 1498 smp_mb__after_atomic_inc(); 1499 spin_unlock(&lun->lun_acl_lock); 1500 1501 pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for " 1502 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(), 1503 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun, 1504 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO", 1505 lacl->initiatorname); 1506 /* 1507 * Check to see if there are any existing persistent reservation APTPL 1508 * pre-registrations that need to be enabled for this LUN ACL.. 1509 */ 1510 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl); 1511 return 0; 1512 } 1513 1514 /* core_dev_del_initiator_node_lun_acl(): 1515 * 1516 * 1517 */ 1518 int core_dev_del_initiator_node_lun_acl( 1519 struct se_portal_group *tpg, 1520 struct se_lun *lun, 1521 struct se_lun_acl *lacl) 1522 { 1523 struct se_node_acl *nacl; 1524 1525 nacl = lacl->se_lun_nacl; 1526 if (!nacl) 1527 return -EINVAL; 1528 1529 spin_lock(&lun->lun_acl_lock); 1530 list_del(&lacl->lacl_list); 1531 atomic_dec(&lun->lun_acl_count); 1532 smp_mb__after_atomic_dec(); 1533 spin_unlock(&lun->lun_acl_lock); 1534 1535 core_disable_device_list_for_node(lun, NULL, lacl->mapped_lun, 1536 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg); 1537 1538 lacl->se_lun = NULL; 1539 1540 pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for" 1541 " InitiatorNode: %s Mapped LUN: %u\n", 1542 tpg->se_tpg_tfo->get_fabric_name(), 1543 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, 1544 lacl->initiatorname, lacl->mapped_lun); 1545 1546 return 0; 1547 } 1548 1549 void core_dev_free_initiator_node_lun_acl( 1550 struct se_portal_group *tpg, 1551 struct se_lun_acl *lacl) 1552 { 1553 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s" 1554 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1555 tpg->se_tpg_tfo->tpg_get_tag(tpg), 1556 tpg->se_tpg_tfo->get_fabric_name(), 1557 lacl->initiatorname, lacl->mapped_lun); 1558 1559 kfree(lacl); 1560 } 1561 1562 int core_dev_setup_virtual_lun0(void) 1563 { 1564 struct se_hba *hba; 1565 struct se_device *dev; 1566 struct se_subsystem_dev *se_dev = NULL; 1567 struct se_subsystem_api *t; 1568 char buf[16]; 1569 int ret; 1570 1571 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE); 1572 if (IS_ERR(hba)) 1573 return PTR_ERR(hba); 1574 1575 lun0_hba = hba; 1576 t = hba->transport; 1577 1578 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL); 1579 if (!se_dev) { 1580 pr_err("Unable to allocate memory for" 1581 " struct se_subsystem_dev\n"); 1582 ret = -ENOMEM; 1583 goto out; 1584 } 1585 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list); 1586 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock); 1587 INIT_LIST_HEAD(&se_dev->t10_pr.registration_list); 1588 INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list); 1589 spin_lock_init(&se_dev->t10_pr.registration_lock); 1590 spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock); 1591 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list); 1592 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock); 1593 spin_lock_init(&se_dev->se_dev_lock); 1594 se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN; 1595 se_dev->t10_wwn.t10_sub_dev = se_dev; 1596 se_dev->t10_alua.t10_sub_dev = se_dev; 1597 se_dev->se_dev_attrib.da_sub_dev = se_dev; 1598 se_dev->se_dev_hba = hba; 1599 1600 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0"); 1601 if (!se_dev->se_dev_su_ptr) { 1602 pr_err("Unable to locate subsystem dependent pointer" 1603 " from allocate_virtdevice()\n"); 1604 ret = -ENOMEM; 1605 goto out; 1606 } 1607 lun0_su_dev = se_dev; 1608 1609 memset(buf, 0, 16); 1610 sprintf(buf, "rd_pages=8"); 1611 t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf)); 1612 1613 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr); 1614 if (IS_ERR(dev)) { 1615 ret = PTR_ERR(dev); 1616 goto out; 1617 } 1618 se_dev->se_dev_ptr = dev; 1619 g_lun0_dev = dev; 1620 1621 return 0; 1622 out: 1623 lun0_su_dev = NULL; 1624 kfree(se_dev); 1625 if (lun0_hba) { 1626 core_delete_hba(lun0_hba); 1627 lun0_hba = NULL; 1628 } 1629 return ret; 1630 } 1631 1632 1633 void core_dev_release_virtual_lun0(void) 1634 { 1635 struct se_hba *hba = lun0_hba; 1636 struct se_subsystem_dev *su_dev = lun0_su_dev; 1637 1638 if (!hba) 1639 return; 1640 1641 if (g_lun0_dev) 1642 se_free_virtual_device(g_lun0_dev, hba); 1643 1644 kfree(su_dev); 1645 core_delete_hba(hba); 1646 } 1647