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