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 unsigned long flags; 324 325 spin_lock_irqsave(&se_nacl->device_list_lock, flags); 326 deve = &se_nacl->device_list[se_cmd->orig_fe_lun]; 327 deve->deve_cmds--; 328 spin_unlock_irqrestore(&se_nacl->device_list_lock, flags); 329 } 330 331 void core_update_device_list_access( 332 u32 mapped_lun, 333 u32 lun_access, 334 struct se_node_acl *nacl) 335 { 336 struct se_dev_entry *deve; 337 338 spin_lock_irq(&nacl->device_list_lock); 339 deve = &nacl->device_list[mapped_lun]; 340 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 341 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 342 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 343 } else { 344 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 345 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 346 } 347 spin_unlock_irq(&nacl->device_list_lock); 348 } 349 350 /* core_update_device_list_for_node(): 351 * 352 * 353 */ 354 int core_update_device_list_for_node( 355 struct se_lun *lun, 356 struct se_lun_acl *lun_acl, 357 u32 mapped_lun, 358 u32 lun_access, 359 struct se_node_acl *nacl, 360 struct se_portal_group *tpg, 361 int enable) 362 { 363 struct se_port *port = lun->lun_sep; 364 struct se_dev_entry *deve = &nacl->device_list[mapped_lun]; 365 int trans = 0; 366 /* 367 * If the MappedLUN entry is being disabled, the entry in 368 * port->sep_alua_list must be removed now before clearing the 369 * struct se_dev_entry pointers below as logic in 370 * core_alua_do_transition_tg_pt() depends on these being present. 371 */ 372 if (!enable) { 373 /* 374 * deve->se_lun_acl will be NULL for demo-mode created LUNs 375 * that have not been explicitly concerted to MappedLUNs -> 376 * struct se_lun_acl, but we remove deve->alua_port_list from 377 * port->sep_alua_list. This also means that active UAs and 378 * NodeACL context specific PR metadata for demo-mode 379 * MappedLUN *deve will be released below.. 380 */ 381 spin_lock_bh(&port->sep_alua_lock); 382 list_del(&deve->alua_port_list); 383 spin_unlock_bh(&port->sep_alua_lock); 384 } 385 386 spin_lock_irq(&nacl->device_list_lock); 387 if (enable) { 388 /* 389 * Check if the call is handling demo mode -> explict LUN ACL 390 * transition. This transition must be for the same struct se_lun 391 * + mapped_lun that was setup in demo mode.. 392 */ 393 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 394 if (deve->se_lun_acl != NULL) { 395 pr_err("struct se_dev_entry->se_lun_acl" 396 " already set for demo mode -> explict" 397 " LUN ACL transition\n"); 398 spin_unlock_irq(&nacl->device_list_lock); 399 return -EINVAL; 400 } 401 if (deve->se_lun != lun) { 402 pr_err("struct se_dev_entry->se_lun does" 403 " match passed struct se_lun for demo mode" 404 " -> explict LUN ACL transition\n"); 405 spin_unlock_irq(&nacl->device_list_lock); 406 return -EINVAL; 407 } 408 deve->se_lun_acl = lun_acl; 409 trans = 1; 410 } else { 411 deve->se_lun = lun; 412 deve->se_lun_acl = lun_acl; 413 deve->mapped_lun = mapped_lun; 414 deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS; 415 } 416 417 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 418 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 419 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 420 } else { 421 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 422 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 423 } 424 425 if (trans) { 426 spin_unlock_irq(&nacl->device_list_lock); 427 return 0; 428 } 429 deve->creation_time = get_jiffies_64(); 430 deve->attach_count++; 431 spin_unlock_irq(&nacl->device_list_lock); 432 433 spin_lock_bh(&port->sep_alua_lock); 434 list_add_tail(&deve->alua_port_list, &port->sep_alua_list); 435 spin_unlock_bh(&port->sep_alua_lock); 436 437 return 0; 438 } 439 /* 440 * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE 441 * PR operation to complete. 442 */ 443 spin_unlock_irq(&nacl->device_list_lock); 444 while (atomic_read(&deve->pr_ref_count) != 0) 445 cpu_relax(); 446 spin_lock_irq(&nacl->device_list_lock); 447 /* 448 * Disable struct se_dev_entry LUN ACL mapping 449 */ 450 core_scsi3_ua_release_all(deve); 451 deve->se_lun = NULL; 452 deve->se_lun_acl = NULL; 453 deve->lun_flags = 0; 454 deve->creation_time = 0; 455 deve->attach_count--; 456 spin_unlock_irq(&nacl->device_list_lock); 457 458 core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl); 459 return 0; 460 } 461 462 /* core_clear_lun_from_tpg(): 463 * 464 * 465 */ 466 void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg) 467 { 468 struct se_node_acl *nacl; 469 struct se_dev_entry *deve; 470 u32 i; 471 472 spin_lock_irq(&tpg->acl_node_lock); 473 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) { 474 spin_unlock_irq(&tpg->acl_node_lock); 475 476 spin_lock_irq(&nacl->device_list_lock); 477 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 478 deve = &nacl->device_list[i]; 479 if (lun != deve->se_lun) 480 continue; 481 spin_unlock_irq(&nacl->device_list_lock); 482 483 core_update_device_list_for_node(lun, NULL, 484 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS, 485 nacl, tpg, 0); 486 487 spin_lock_irq(&nacl->device_list_lock); 488 } 489 spin_unlock_irq(&nacl->device_list_lock); 490 491 spin_lock_irq(&tpg->acl_node_lock); 492 } 493 spin_unlock_irq(&tpg->acl_node_lock); 494 } 495 496 static struct se_port *core_alloc_port(struct se_device *dev) 497 { 498 struct se_port *port, *port_tmp; 499 500 port = kzalloc(sizeof(struct se_port), GFP_KERNEL); 501 if (!port) { 502 pr_err("Unable to allocate struct se_port\n"); 503 return ERR_PTR(-ENOMEM); 504 } 505 INIT_LIST_HEAD(&port->sep_alua_list); 506 INIT_LIST_HEAD(&port->sep_list); 507 atomic_set(&port->sep_tg_pt_secondary_offline, 0); 508 spin_lock_init(&port->sep_alua_lock); 509 mutex_init(&port->sep_tg_pt_md_mutex); 510 511 spin_lock(&dev->se_port_lock); 512 if (dev->dev_port_count == 0x0000ffff) { 513 pr_warn("Reached dev->dev_port_count ==" 514 " 0x0000ffff\n"); 515 spin_unlock(&dev->se_port_lock); 516 return ERR_PTR(-ENOSPC); 517 } 518 again: 519 /* 520 * Allocate the next RELATIVE TARGET PORT IDENTIFER for this struct se_device 521 * Here is the table from spc4r17 section 7.7.3.8. 522 * 523 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field 524 * 525 * Code Description 526 * 0h Reserved 527 * 1h Relative port 1, historically known as port A 528 * 2h Relative port 2, historically known as port B 529 * 3h to FFFFh Relative port 3 through 65 535 530 */ 531 port->sep_rtpi = dev->dev_rpti_counter++; 532 if (!port->sep_rtpi) 533 goto again; 534 535 list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) { 536 /* 537 * Make sure RELATIVE TARGET PORT IDENTIFER is unique 538 * for 16-bit wrap.. 539 */ 540 if (port->sep_rtpi == port_tmp->sep_rtpi) 541 goto again; 542 } 543 spin_unlock(&dev->se_port_lock); 544 545 return port; 546 } 547 548 static void core_export_port( 549 struct se_device *dev, 550 struct se_portal_group *tpg, 551 struct se_port *port, 552 struct se_lun *lun) 553 { 554 struct se_subsystem_dev *su_dev = dev->se_sub_dev; 555 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL; 556 557 spin_lock(&dev->se_port_lock); 558 spin_lock(&lun->lun_sep_lock); 559 port->sep_tpg = tpg; 560 port->sep_lun = lun; 561 lun->lun_sep = port; 562 spin_unlock(&lun->lun_sep_lock); 563 564 list_add_tail(&port->sep_list, &dev->dev_sep_list); 565 spin_unlock(&dev->se_port_lock); 566 567 if (su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) { 568 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port); 569 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) { 570 pr_err("Unable to allocate t10_alua_tg_pt" 571 "_gp_member_t\n"); 572 return; 573 } 574 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 575 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem, 576 su_dev->t10_alua.default_tg_pt_gp); 577 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 578 pr_debug("%s/%s: Adding to default ALUA Target Port" 579 " Group: alua/default_tg_pt_gp\n", 580 dev->transport->name, tpg->se_tpg_tfo->get_fabric_name()); 581 } 582 583 dev->dev_port_count++; 584 port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFER */ 585 } 586 587 /* 588 * Called with struct se_device->se_port_lock spinlock held. 589 */ 590 static void core_release_port(struct se_device *dev, struct se_port *port) 591 __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock) 592 { 593 /* 594 * Wait for any port reference for PR ALL_TG_PT=1 operation 595 * to complete in __core_scsi3_alloc_registration() 596 */ 597 spin_unlock(&dev->se_port_lock); 598 if (atomic_read(&port->sep_tg_pt_ref_cnt)) 599 cpu_relax(); 600 spin_lock(&dev->se_port_lock); 601 602 core_alua_free_tg_pt_gp_mem(port); 603 604 list_del(&port->sep_list); 605 dev->dev_port_count--; 606 kfree(port); 607 } 608 609 int core_dev_export( 610 struct se_device *dev, 611 struct se_portal_group *tpg, 612 struct se_lun *lun) 613 { 614 struct se_port *port; 615 616 port = core_alloc_port(dev); 617 if (IS_ERR(port)) 618 return PTR_ERR(port); 619 620 lun->lun_se_dev = dev; 621 se_dev_start(dev); 622 623 atomic_inc(&dev->dev_export_obj.obj_access_count); 624 core_export_port(dev, tpg, port, lun); 625 return 0; 626 } 627 628 void core_dev_unexport( 629 struct se_device *dev, 630 struct se_portal_group *tpg, 631 struct se_lun *lun) 632 { 633 struct se_port *port = lun->lun_sep; 634 635 spin_lock(&lun->lun_sep_lock); 636 if (lun->lun_se_dev == NULL) { 637 spin_unlock(&lun->lun_sep_lock); 638 return; 639 } 640 spin_unlock(&lun->lun_sep_lock); 641 642 spin_lock(&dev->se_port_lock); 643 atomic_dec(&dev->dev_export_obj.obj_access_count); 644 core_release_port(dev, port); 645 spin_unlock(&dev->se_port_lock); 646 647 se_dev_stop(dev); 648 lun->lun_se_dev = NULL; 649 } 650 651 int target_report_luns(struct se_task *se_task) 652 { 653 struct se_cmd *se_cmd = se_task->task_se_cmd; 654 struct se_dev_entry *deve; 655 struct se_lun *se_lun; 656 struct se_session *se_sess = se_cmd->se_sess; 657 unsigned char *buf; 658 u32 cdb_offset = 0, lun_count = 0, offset = 8, i; 659 660 buf = (unsigned char *) transport_kmap_data_sg(se_cmd); 661 662 /* 663 * If no struct se_session pointer is present, this struct se_cmd is 664 * coming via a target_core_mod PASSTHROUGH op, and not through 665 * a $FABRIC_MOD. In that case, report LUN=0 only. 666 */ 667 if (!se_sess) { 668 int_to_scsilun(0, (struct scsi_lun *)&buf[offset]); 669 lun_count = 1; 670 goto done; 671 } 672 673 spin_lock_irq(&se_sess->se_node_acl->device_list_lock); 674 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 675 deve = &se_sess->se_node_acl->device_list[i]; 676 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 677 continue; 678 se_lun = deve->se_lun; 679 /* 680 * We determine the correct LUN LIST LENGTH even once we 681 * have reached the initial allocation length. 682 * See SPC2-R20 7.19. 683 */ 684 lun_count++; 685 if ((cdb_offset + 8) >= se_cmd->data_length) 686 continue; 687 688 int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]); 689 offset += 8; 690 cdb_offset += 8; 691 } 692 spin_unlock_irq(&se_sess->se_node_acl->device_list_lock); 693 694 /* 695 * See SPC3 r07, page 159. 696 */ 697 done: 698 transport_kunmap_data_sg(se_cmd); 699 lun_count *= 8; 700 buf[0] = ((lun_count >> 24) & 0xff); 701 buf[1] = ((lun_count >> 16) & 0xff); 702 buf[2] = ((lun_count >> 8) & 0xff); 703 buf[3] = (lun_count & 0xff); 704 705 se_task->task_scsi_status = GOOD; 706 transport_complete_task(se_task, 1); 707 return 0; 708 } 709 710 /* se_release_device_for_hba(): 711 * 712 * 713 */ 714 void se_release_device_for_hba(struct se_device *dev) 715 { 716 struct se_hba *hba = dev->se_hba; 717 718 if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) || 719 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) || 720 (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) || 721 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) || 722 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED)) 723 se_dev_stop(dev); 724 725 if (dev->dev_ptr) { 726 kthread_stop(dev->process_thread); 727 if (dev->transport->free_device) 728 dev->transport->free_device(dev->dev_ptr); 729 } 730 731 spin_lock(&hba->device_lock); 732 list_del(&dev->dev_list); 733 hba->dev_count--; 734 spin_unlock(&hba->device_lock); 735 736 core_scsi3_free_all_registrations(dev); 737 se_release_vpd_for_dev(dev); 738 739 kfree(dev); 740 } 741 742 void se_release_vpd_for_dev(struct se_device *dev) 743 { 744 struct t10_vpd *vpd, *vpd_tmp; 745 746 spin_lock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock); 747 list_for_each_entry_safe(vpd, vpd_tmp, 748 &dev->se_sub_dev->t10_wwn.t10_vpd_list, vpd_list) { 749 list_del(&vpd->vpd_list); 750 kfree(vpd); 751 } 752 spin_unlock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock); 753 } 754 755 /* se_free_virtual_device(): 756 * 757 * Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers. 758 */ 759 int se_free_virtual_device(struct se_device *dev, struct se_hba *hba) 760 { 761 if (!list_empty(&dev->dev_sep_list)) 762 dump_stack(); 763 764 core_alua_free_lu_gp_mem(dev); 765 se_release_device_for_hba(dev); 766 767 return 0; 768 } 769 770 static void se_dev_start(struct se_device *dev) 771 { 772 struct se_hba *hba = dev->se_hba; 773 774 spin_lock(&hba->device_lock); 775 atomic_inc(&dev->dev_obj.obj_access_count); 776 if (atomic_read(&dev->dev_obj.obj_access_count) == 1) { 777 if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) { 778 dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED; 779 dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED; 780 } else if (dev->dev_status & 781 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) { 782 dev->dev_status &= 783 ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED; 784 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED; 785 } 786 } 787 spin_unlock(&hba->device_lock); 788 } 789 790 static void se_dev_stop(struct se_device *dev) 791 { 792 struct se_hba *hba = dev->se_hba; 793 794 spin_lock(&hba->device_lock); 795 atomic_dec(&dev->dev_obj.obj_access_count); 796 if (atomic_read(&dev->dev_obj.obj_access_count) == 0) { 797 if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) { 798 dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED; 799 dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED; 800 } else if (dev->dev_status & 801 TRANSPORT_DEVICE_OFFLINE_ACTIVATED) { 802 dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED; 803 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED; 804 } 805 } 806 spin_unlock(&hba->device_lock); 807 } 808 809 int se_dev_check_online(struct se_device *dev) 810 { 811 unsigned long flags; 812 int ret; 813 814 spin_lock_irqsave(&dev->dev_status_lock, flags); 815 ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) || 816 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1; 817 spin_unlock_irqrestore(&dev->dev_status_lock, flags); 818 819 return ret; 820 } 821 822 int se_dev_check_shutdown(struct se_device *dev) 823 { 824 int ret; 825 826 spin_lock_irq(&dev->dev_status_lock); 827 ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN); 828 spin_unlock_irq(&dev->dev_status_lock); 829 830 return ret; 831 } 832 833 u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size) 834 { 835 u32 tmp, aligned_max_sectors; 836 /* 837 * Limit max_sectors to a PAGE_SIZE aligned value for modern 838 * transport_allocate_data_tasks() operation. 839 */ 840 tmp = rounddown((max_sectors * block_size), PAGE_SIZE); 841 aligned_max_sectors = (tmp / block_size); 842 if (max_sectors != aligned_max_sectors) { 843 printk(KERN_INFO "Rounding down aligned max_sectors from %u" 844 " to %u\n", max_sectors, aligned_max_sectors); 845 return aligned_max_sectors; 846 } 847 848 return max_sectors; 849 } 850 851 void se_dev_set_default_attribs( 852 struct se_device *dev, 853 struct se_dev_limits *dev_limits) 854 { 855 struct queue_limits *limits = &dev_limits->limits; 856 857 dev->se_sub_dev->se_dev_attrib.emulate_dpo = DA_EMULATE_DPO; 858 dev->se_sub_dev->se_dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE; 859 dev->se_sub_dev->se_dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ; 860 dev->se_sub_dev->se_dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE; 861 dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL; 862 dev->se_sub_dev->se_dev_attrib.emulate_tas = DA_EMULATE_TAS; 863 dev->se_sub_dev->se_dev_attrib.emulate_tpu = DA_EMULATE_TPU; 864 dev->se_sub_dev->se_dev_attrib.emulate_tpws = DA_EMULATE_TPWS; 865 dev->se_sub_dev->se_dev_attrib.emulate_reservations = DA_EMULATE_RESERVATIONS; 866 dev->se_sub_dev->se_dev_attrib.emulate_alua = DA_EMULATE_ALUA; 867 dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS; 868 dev->se_sub_dev->se_dev_attrib.is_nonrot = DA_IS_NONROT; 869 dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD; 870 /* 871 * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK 872 * iblock_create_virtdevice() from struct queue_limits values 873 * if blk_queue_discard()==1 874 */ 875 dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT; 876 dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count = 877 DA_MAX_UNMAP_BLOCK_DESC_COUNT; 878 dev->se_sub_dev->se_dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT; 879 dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment = 880 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT; 881 /* 882 * block_size is based on subsystem plugin dependent requirements. 883 */ 884 dev->se_sub_dev->se_dev_attrib.hw_block_size = limits->logical_block_size; 885 dev->se_sub_dev->se_dev_attrib.block_size = limits->logical_block_size; 886 /* 887 * max_sectors is based on subsystem plugin dependent requirements. 888 */ 889 dev->se_sub_dev->se_dev_attrib.hw_max_sectors = limits->max_hw_sectors; 890 /* 891 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks() 892 */ 893 limits->max_sectors = se_dev_align_max_sectors(limits->max_sectors, 894 limits->logical_block_size); 895 dev->se_sub_dev->se_dev_attrib.max_sectors = limits->max_sectors; 896 /* 897 * Set optimal_sectors from max_sectors, which can be lowered via 898 * configfs. 899 */ 900 dev->se_sub_dev->se_dev_attrib.optimal_sectors = limits->max_sectors; 901 /* 902 * queue_depth is based on subsystem plugin dependent requirements. 903 */ 904 dev->se_sub_dev->se_dev_attrib.hw_queue_depth = dev_limits->hw_queue_depth; 905 dev->se_sub_dev->se_dev_attrib.queue_depth = dev_limits->queue_depth; 906 } 907 908 int se_dev_set_max_unmap_lba_count( 909 struct se_device *dev, 910 u32 max_unmap_lba_count) 911 { 912 dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = max_unmap_lba_count; 913 pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n", 914 dev, dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count); 915 return 0; 916 } 917 918 int se_dev_set_max_unmap_block_desc_count( 919 struct se_device *dev, 920 u32 max_unmap_block_desc_count) 921 { 922 dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count = 923 max_unmap_block_desc_count; 924 pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n", 925 dev, dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count); 926 return 0; 927 } 928 929 int se_dev_set_unmap_granularity( 930 struct se_device *dev, 931 u32 unmap_granularity) 932 { 933 dev->se_sub_dev->se_dev_attrib.unmap_granularity = unmap_granularity; 934 pr_debug("dev[%p]: Set unmap_granularity: %u\n", 935 dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity); 936 return 0; 937 } 938 939 int se_dev_set_unmap_granularity_alignment( 940 struct se_device *dev, 941 u32 unmap_granularity_alignment) 942 { 943 dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment; 944 pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n", 945 dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment); 946 return 0; 947 } 948 949 int se_dev_set_emulate_dpo(struct se_device *dev, int flag) 950 { 951 if (flag != 0 && flag != 1) { 952 pr_err("Illegal value %d\n", flag); 953 return -EINVAL; 954 } 955 956 if (flag) { 957 pr_err("dpo_emulated not supported\n"); 958 return -EINVAL; 959 } 960 961 return 0; 962 } 963 964 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag) 965 { 966 if (flag != 0 && flag != 1) { 967 pr_err("Illegal value %d\n", flag); 968 return -EINVAL; 969 } 970 971 if (flag && dev->transport->fua_write_emulated == 0) { 972 pr_err("fua_write_emulated not supported\n"); 973 return -EINVAL; 974 } 975 dev->se_sub_dev->se_dev_attrib.emulate_fua_write = flag; 976 pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n", 977 dev, dev->se_sub_dev->se_dev_attrib.emulate_fua_write); 978 return 0; 979 } 980 981 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag) 982 { 983 if (flag != 0 && flag != 1) { 984 pr_err("Illegal value %d\n", flag); 985 return -EINVAL; 986 } 987 988 if (flag) { 989 pr_err("ua read emulated not supported\n"); 990 return -EINVAL; 991 } 992 993 return 0; 994 } 995 996 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag) 997 { 998 if (flag != 0 && flag != 1) { 999 pr_err("Illegal value %d\n", flag); 1000 return -EINVAL; 1001 } 1002 if (flag && dev->transport->write_cache_emulated == 0) { 1003 pr_err("write_cache_emulated not supported\n"); 1004 return -EINVAL; 1005 } 1006 dev->se_sub_dev->se_dev_attrib.emulate_write_cache = flag; 1007 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 1008 dev, dev->se_sub_dev->se_dev_attrib.emulate_write_cache); 1009 return 0; 1010 } 1011 1012 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag) 1013 { 1014 if ((flag != 0) && (flag != 1) && (flag != 2)) { 1015 pr_err("Illegal value %d\n", flag); 1016 return -EINVAL; 1017 } 1018 1019 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1020 pr_err("dev[%p]: Unable to change SE Device" 1021 " UA_INTRLCK_CTRL while dev_export_obj: %d count" 1022 " exists\n", dev, 1023 atomic_read(&dev->dev_export_obj.obj_access_count)); 1024 return -EINVAL; 1025 } 1026 dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = flag; 1027 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 1028 dev, dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl); 1029 1030 return 0; 1031 } 1032 1033 int se_dev_set_emulate_tas(struct se_device *dev, int flag) 1034 { 1035 if ((flag != 0) && (flag != 1)) { 1036 pr_err("Illegal value %d\n", flag); 1037 return -EINVAL; 1038 } 1039 1040 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1041 pr_err("dev[%p]: Unable to change SE Device TAS while" 1042 " dev_export_obj: %d count exists\n", dev, 1043 atomic_read(&dev->dev_export_obj.obj_access_count)); 1044 return -EINVAL; 1045 } 1046 dev->se_sub_dev->se_dev_attrib.emulate_tas = flag; 1047 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 1048 dev, (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? "Enabled" : "Disabled"); 1049 1050 return 0; 1051 } 1052 1053 int se_dev_set_emulate_tpu(struct se_device *dev, int flag) 1054 { 1055 if ((flag != 0) && (flag != 1)) { 1056 pr_err("Illegal value %d\n", flag); 1057 return -EINVAL; 1058 } 1059 /* 1060 * We expect this value to be non-zero when generic Block Layer 1061 * Discard supported is detected iblock_create_virtdevice(). 1062 */ 1063 if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) { 1064 pr_err("Generic Block Discard not supported\n"); 1065 return -ENOSYS; 1066 } 1067 1068 dev->se_sub_dev->se_dev_attrib.emulate_tpu = flag; 1069 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 1070 dev, flag); 1071 return 0; 1072 } 1073 1074 int se_dev_set_emulate_tpws(struct se_device *dev, int flag) 1075 { 1076 if ((flag != 0) && (flag != 1)) { 1077 pr_err("Illegal value %d\n", flag); 1078 return -EINVAL; 1079 } 1080 /* 1081 * We expect this value to be non-zero when generic Block Layer 1082 * Discard supported is detected iblock_create_virtdevice(). 1083 */ 1084 if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) { 1085 pr_err("Generic Block Discard not supported\n"); 1086 return -ENOSYS; 1087 } 1088 1089 dev->se_sub_dev->se_dev_attrib.emulate_tpws = flag; 1090 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 1091 dev, flag); 1092 return 0; 1093 } 1094 1095 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag) 1096 { 1097 if ((flag != 0) && (flag != 1)) { 1098 pr_err("Illegal value %d\n", flag); 1099 return -EINVAL; 1100 } 1101 dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = flag; 1102 pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev, 1103 (dev->se_sub_dev->se_dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled"); 1104 return 0; 1105 } 1106 1107 int se_dev_set_is_nonrot(struct se_device *dev, int flag) 1108 { 1109 if ((flag != 0) && (flag != 1)) { 1110 printk(KERN_ERR "Illegal value %d\n", flag); 1111 return -EINVAL; 1112 } 1113 dev->se_sub_dev->se_dev_attrib.is_nonrot = flag; 1114 pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n", 1115 dev, flag); 1116 return 0; 1117 } 1118 1119 int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag) 1120 { 1121 if (flag != 0) { 1122 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted" 1123 " reordering not implemented\n", dev); 1124 return -ENOSYS; 1125 } 1126 dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = flag; 1127 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag); 1128 return 0; 1129 } 1130 1131 /* 1132 * Note, this can only be called on unexported SE Device Object. 1133 */ 1134 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth) 1135 { 1136 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1137 pr_err("dev[%p]: Unable to change SE Device TCQ while" 1138 " dev_export_obj: %d count exists\n", dev, 1139 atomic_read(&dev->dev_export_obj.obj_access_count)); 1140 return -EINVAL; 1141 } 1142 if (!queue_depth) { 1143 pr_err("dev[%p]: Illegal ZERO value for queue" 1144 "_depth\n", dev); 1145 return -EINVAL; 1146 } 1147 1148 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1149 if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) { 1150 pr_err("dev[%p]: Passed queue_depth: %u" 1151 " exceeds TCM/SE_Device TCQ: %u\n", 1152 dev, queue_depth, 1153 dev->se_sub_dev->se_dev_attrib.hw_queue_depth); 1154 return -EINVAL; 1155 } 1156 } else { 1157 if (queue_depth > dev->se_sub_dev->se_dev_attrib.queue_depth) { 1158 if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) { 1159 pr_err("dev[%p]: Passed queue_depth:" 1160 " %u exceeds TCM/SE_Device MAX" 1161 " TCQ: %u\n", dev, queue_depth, 1162 dev->se_sub_dev->se_dev_attrib.hw_queue_depth); 1163 return -EINVAL; 1164 } 1165 } 1166 } 1167 1168 dev->se_sub_dev->se_dev_attrib.queue_depth = dev->queue_depth = queue_depth; 1169 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", 1170 dev, queue_depth); 1171 return 0; 1172 } 1173 1174 int se_dev_set_max_sectors(struct se_device *dev, u32 max_sectors) 1175 { 1176 int force = 0; /* Force setting for VDEVS */ 1177 1178 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1179 pr_err("dev[%p]: Unable to change SE Device" 1180 " max_sectors while dev_export_obj: %d count exists\n", 1181 dev, atomic_read(&dev->dev_export_obj.obj_access_count)); 1182 return -EINVAL; 1183 } 1184 if (!max_sectors) { 1185 pr_err("dev[%p]: Illegal ZERO value for" 1186 " max_sectors\n", dev); 1187 return -EINVAL; 1188 } 1189 if (max_sectors < DA_STATUS_MAX_SECTORS_MIN) { 1190 pr_err("dev[%p]: Passed max_sectors: %u less than" 1191 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, max_sectors, 1192 DA_STATUS_MAX_SECTORS_MIN); 1193 return -EINVAL; 1194 } 1195 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1196 if (max_sectors > dev->se_sub_dev->se_dev_attrib.hw_max_sectors) { 1197 pr_err("dev[%p]: Passed max_sectors: %u" 1198 " greater than TCM/SE_Device max_sectors:" 1199 " %u\n", dev, max_sectors, 1200 dev->se_sub_dev->se_dev_attrib.hw_max_sectors); 1201 return -EINVAL; 1202 } 1203 } else { 1204 if (!force && (max_sectors > 1205 dev->se_sub_dev->se_dev_attrib.hw_max_sectors)) { 1206 pr_err("dev[%p]: Passed max_sectors: %u" 1207 " greater than TCM/SE_Device max_sectors" 1208 ": %u, use force=1 to override.\n", dev, 1209 max_sectors, dev->se_sub_dev->se_dev_attrib.hw_max_sectors); 1210 return -EINVAL; 1211 } 1212 if (max_sectors > DA_STATUS_MAX_SECTORS_MAX) { 1213 pr_err("dev[%p]: Passed max_sectors: %u" 1214 " greater than DA_STATUS_MAX_SECTORS_MAX:" 1215 " %u\n", dev, max_sectors, 1216 DA_STATUS_MAX_SECTORS_MAX); 1217 return -EINVAL; 1218 } 1219 } 1220 /* 1221 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks() 1222 */ 1223 max_sectors = se_dev_align_max_sectors(max_sectors, 1224 dev->se_sub_dev->se_dev_attrib.block_size); 1225 1226 dev->se_sub_dev->se_dev_attrib.max_sectors = max_sectors; 1227 pr_debug("dev[%p]: SE Device max_sectors changed to %u\n", 1228 dev, max_sectors); 1229 return 0; 1230 } 1231 1232 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors) 1233 { 1234 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1235 pr_err("dev[%p]: Unable to change SE Device" 1236 " optimal_sectors while dev_export_obj: %d count exists\n", 1237 dev, atomic_read(&dev->dev_export_obj.obj_access_count)); 1238 return -EINVAL; 1239 } 1240 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1241 pr_err("dev[%p]: Passed optimal_sectors cannot be" 1242 " changed for TCM/pSCSI\n", dev); 1243 return -EINVAL; 1244 } 1245 if (optimal_sectors > dev->se_sub_dev->se_dev_attrib.max_sectors) { 1246 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1247 " greater than max_sectors: %u\n", dev, 1248 optimal_sectors, dev->se_sub_dev->se_dev_attrib.max_sectors); 1249 return -EINVAL; 1250 } 1251 1252 dev->se_sub_dev->se_dev_attrib.optimal_sectors = optimal_sectors; 1253 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1254 dev, optimal_sectors); 1255 return 0; 1256 } 1257 1258 int se_dev_set_block_size(struct se_device *dev, u32 block_size) 1259 { 1260 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1261 pr_err("dev[%p]: Unable to change SE Device block_size" 1262 " while dev_export_obj: %d count exists\n", dev, 1263 atomic_read(&dev->dev_export_obj.obj_access_count)); 1264 return -EINVAL; 1265 } 1266 1267 if ((block_size != 512) && 1268 (block_size != 1024) && 1269 (block_size != 2048) && 1270 (block_size != 4096)) { 1271 pr_err("dev[%p]: Illegal value for block_device: %u" 1272 " for SE device, must be 512, 1024, 2048 or 4096\n", 1273 dev, block_size); 1274 return -EINVAL; 1275 } 1276 1277 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1278 pr_err("dev[%p]: Not allowed to change block_size for" 1279 " Physical Device, use for Linux/SCSI to change" 1280 " block_size for underlying hardware\n", dev); 1281 return -EINVAL; 1282 } 1283 1284 dev->se_sub_dev->se_dev_attrib.block_size = block_size; 1285 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1286 dev, block_size); 1287 return 0; 1288 } 1289 1290 struct se_lun *core_dev_add_lun( 1291 struct se_portal_group *tpg, 1292 struct se_hba *hba, 1293 struct se_device *dev, 1294 u32 lun) 1295 { 1296 struct se_lun *lun_p; 1297 u32 lun_access = 0; 1298 int rc; 1299 1300 if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) { 1301 pr_err("Unable to export struct se_device while dev_access_obj: %d\n", 1302 atomic_read(&dev->dev_access_obj.obj_access_count)); 1303 return ERR_PTR(-EACCES); 1304 } 1305 1306 lun_p = core_tpg_pre_addlun(tpg, lun); 1307 if (IS_ERR(lun_p)) 1308 return lun_p; 1309 1310 if (dev->dev_flags & DF_READ_ONLY) 1311 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; 1312 else 1313 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE; 1314 1315 rc = core_tpg_post_addlun(tpg, lun_p, lun_access, dev); 1316 if (rc < 0) 1317 return ERR_PTR(rc); 1318 1319 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from" 1320 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1321 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun_p->unpacked_lun, 1322 tpg->se_tpg_tfo->get_fabric_name(), hba->hba_id); 1323 /* 1324 * Update LUN maps for dynamically added initiators when 1325 * generate_node_acl is enabled. 1326 */ 1327 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) { 1328 struct se_node_acl *acl; 1329 spin_lock_irq(&tpg->acl_node_lock); 1330 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { 1331 if (acl->dynamic_node_acl && 1332 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only || 1333 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) { 1334 spin_unlock_irq(&tpg->acl_node_lock); 1335 core_tpg_add_node_to_devs(acl, tpg); 1336 spin_lock_irq(&tpg->acl_node_lock); 1337 } 1338 } 1339 spin_unlock_irq(&tpg->acl_node_lock); 1340 } 1341 1342 return lun_p; 1343 } 1344 1345 /* core_dev_del_lun(): 1346 * 1347 * 1348 */ 1349 int core_dev_del_lun( 1350 struct se_portal_group *tpg, 1351 u32 unpacked_lun) 1352 { 1353 struct se_lun *lun; 1354 1355 lun = core_tpg_pre_dellun(tpg, unpacked_lun); 1356 if (IS_ERR(lun)) 1357 return PTR_ERR(lun); 1358 1359 core_tpg_post_dellun(tpg, lun); 1360 1361 pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from" 1362 " device object\n", tpg->se_tpg_tfo->get_fabric_name(), 1363 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, 1364 tpg->se_tpg_tfo->get_fabric_name()); 1365 1366 return 0; 1367 } 1368 1369 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun) 1370 { 1371 struct se_lun *lun; 1372 1373 spin_lock(&tpg->tpg_lun_lock); 1374 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1375 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS" 1376 "_PER_TPG-1: %u for Target Portal Group: %hu\n", 1377 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1378 TRANSPORT_MAX_LUNS_PER_TPG-1, 1379 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1380 spin_unlock(&tpg->tpg_lun_lock); 1381 return NULL; 1382 } 1383 lun = &tpg->tpg_lun_list[unpacked_lun]; 1384 1385 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) { 1386 pr_err("%s Logical Unit Number: %u is not free on" 1387 " Target Portal Group: %hu, ignoring request.\n", 1388 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1389 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1390 spin_unlock(&tpg->tpg_lun_lock); 1391 return NULL; 1392 } 1393 spin_unlock(&tpg->tpg_lun_lock); 1394 1395 return lun; 1396 } 1397 1398 /* core_dev_get_lun(): 1399 * 1400 * 1401 */ 1402 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun) 1403 { 1404 struct se_lun *lun; 1405 1406 spin_lock(&tpg->tpg_lun_lock); 1407 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1408 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER" 1409 "_TPG-1: %u for Target Portal Group: %hu\n", 1410 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1411 TRANSPORT_MAX_LUNS_PER_TPG-1, 1412 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1413 spin_unlock(&tpg->tpg_lun_lock); 1414 return NULL; 1415 } 1416 lun = &tpg->tpg_lun_list[unpacked_lun]; 1417 1418 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { 1419 pr_err("%s Logical Unit Number: %u is not active on" 1420 " Target Portal Group: %hu, ignoring request.\n", 1421 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1422 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1423 spin_unlock(&tpg->tpg_lun_lock); 1424 return NULL; 1425 } 1426 spin_unlock(&tpg->tpg_lun_lock); 1427 1428 return lun; 1429 } 1430 1431 struct se_lun_acl *core_dev_init_initiator_node_lun_acl( 1432 struct se_portal_group *tpg, 1433 u32 mapped_lun, 1434 char *initiatorname, 1435 int *ret) 1436 { 1437 struct se_lun_acl *lacl; 1438 struct se_node_acl *nacl; 1439 1440 if (strlen(initiatorname) >= TRANSPORT_IQN_LEN) { 1441 pr_err("%s InitiatorName exceeds maximum size.\n", 1442 tpg->se_tpg_tfo->get_fabric_name()); 1443 *ret = -EOVERFLOW; 1444 return NULL; 1445 } 1446 nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname); 1447 if (!nacl) { 1448 *ret = -EINVAL; 1449 return NULL; 1450 } 1451 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL); 1452 if (!lacl) { 1453 pr_err("Unable to allocate memory for struct se_lun_acl.\n"); 1454 *ret = -ENOMEM; 1455 return NULL; 1456 } 1457 1458 INIT_LIST_HEAD(&lacl->lacl_list); 1459 lacl->mapped_lun = mapped_lun; 1460 lacl->se_lun_nacl = nacl; 1461 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); 1462 1463 return lacl; 1464 } 1465 1466 int core_dev_add_initiator_node_lun_acl( 1467 struct se_portal_group *tpg, 1468 struct se_lun_acl *lacl, 1469 u32 unpacked_lun, 1470 u32 lun_access) 1471 { 1472 struct se_lun *lun; 1473 struct se_node_acl *nacl; 1474 1475 lun = core_dev_get_lun(tpg, unpacked_lun); 1476 if (!lun) { 1477 pr_err("%s Logical Unit Number: %u is not active on" 1478 " Target Portal Group: %hu, ignoring request.\n", 1479 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1480 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1481 return -EINVAL; 1482 } 1483 1484 nacl = lacl->se_lun_nacl; 1485 if (!nacl) 1486 return -EINVAL; 1487 1488 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) && 1489 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE)) 1490 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; 1491 1492 lacl->se_lun = lun; 1493 1494 if (core_update_device_list_for_node(lun, lacl, lacl->mapped_lun, 1495 lun_access, nacl, tpg, 1) < 0) 1496 return -EINVAL; 1497 1498 spin_lock(&lun->lun_acl_lock); 1499 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list); 1500 atomic_inc(&lun->lun_acl_count); 1501 smp_mb__after_atomic_inc(); 1502 spin_unlock(&lun->lun_acl_lock); 1503 1504 pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for " 1505 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(), 1506 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun, 1507 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO", 1508 lacl->initiatorname); 1509 /* 1510 * Check to see if there are any existing persistent reservation APTPL 1511 * pre-registrations that need to be enabled for this LUN ACL.. 1512 */ 1513 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl); 1514 return 0; 1515 } 1516 1517 /* core_dev_del_initiator_node_lun_acl(): 1518 * 1519 * 1520 */ 1521 int core_dev_del_initiator_node_lun_acl( 1522 struct se_portal_group *tpg, 1523 struct se_lun *lun, 1524 struct se_lun_acl *lacl) 1525 { 1526 struct se_node_acl *nacl; 1527 1528 nacl = lacl->se_lun_nacl; 1529 if (!nacl) 1530 return -EINVAL; 1531 1532 spin_lock(&lun->lun_acl_lock); 1533 list_del(&lacl->lacl_list); 1534 atomic_dec(&lun->lun_acl_count); 1535 smp_mb__after_atomic_dec(); 1536 spin_unlock(&lun->lun_acl_lock); 1537 1538 core_update_device_list_for_node(lun, NULL, lacl->mapped_lun, 1539 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0); 1540 1541 lacl->se_lun = NULL; 1542 1543 pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for" 1544 " InitiatorNode: %s Mapped LUN: %u\n", 1545 tpg->se_tpg_tfo->get_fabric_name(), 1546 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, 1547 lacl->initiatorname, lacl->mapped_lun); 1548 1549 return 0; 1550 } 1551 1552 void core_dev_free_initiator_node_lun_acl( 1553 struct se_portal_group *tpg, 1554 struct se_lun_acl *lacl) 1555 { 1556 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s" 1557 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1558 tpg->se_tpg_tfo->tpg_get_tag(tpg), 1559 tpg->se_tpg_tfo->get_fabric_name(), 1560 lacl->initiatorname, lacl->mapped_lun); 1561 1562 kfree(lacl); 1563 } 1564 1565 int core_dev_setup_virtual_lun0(void) 1566 { 1567 struct se_hba *hba; 1568 struct se_device *dev; 1569 struct se_subsystem_dev *se_dev = NULL; 1570 struct se_subsystem_api *t; 1571 char buf[16]; 1572 int ret; 1573 1574 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE); 1575 if (IS_ERR(hba)) 1576 return PTR_ERR(hba); 1577 1578 lun0_hba = hba; 1579 t = hba->transport; 1580 1581 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL); 1582 if (!se_dev) { 1583 pr_err("Unable to allocate memory for" 1584 " struct se_subsystem_dev\n"); 1585 ret = -ENOMEM; 1586 goto out; 1587 } 1588 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list); 1589 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock); 1590 INIT_LIST_HEAD(&se_dev->t10_pr.registration_list); 1591 INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list); 1592 spin_lock_init(&se_dev->t10_pr.registration_lock); 1593 spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock); 1594 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list); 1595 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock); 1596 spin_lock_init(&se_dev->se_dev_lock); 1597 se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN; 1598 se_dev->t10_wwn.t10_sub_dev = se_dev; 1599 se_dev->t10_alua.t10_sub_dev = se_dev; 1600 se_dev->se_dev_attrib.da_sub_dev = se_dev; 1601 se_dev->se_dev_hba = hba; 1602 1603 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0"); 1604 if (!se_dev->se_dev_su_ptr) { 1605 pr_err("Unable to locate subsystem dependent pointer" 1606 " from allocate_virtdevice()\n"); 1607 ret = -ENOMEM; 1608 goto out; 1609 } 1610 lun0_su_dev = se_dev; 1611 1612 memset(buf, 0, 16); 1613 sprintf(buf, "rd_pages=8"); 1614 t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf)); 1615 1616 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr); 1617 if (IS_ERR(dev)) { 1618 ret = PTR_ERR(dev); 1619 goto out; 1620 } 1621 se_dev->se_dev_ptr = dev; 1622 g_lun0_dev = dev; 1623 1624 return 0; 1625 out: 1626 lun0_su_dev = NULL; 1627 kfree(se_dev); 1628 if (lun0_hba) { 1629 core_delete_hba(lun0_hba); 1630 lun0_hba = NULL; 1631 } 1632 return ret; 1633 } 1634 1635 1636 void core_dev_release_virtual_lun0(void) 1637 { 1638 struct se_hba *hba = lun0_hba; 1639 struct se_subsystem_dev *su_dev = lun0_su_dev; 1640 1641 if (!hba) 1642 return; 1643 1644 if (g_lun0_dev) 1645 se_free_virtual_device(g_lun0_dev, hba); 1646 1647 kfree(su_dev); 1648 core_delete_hba(hba); 1649 } 1650