1 /******************************************************************************* 2 * Filename: target_core_device.c (based on iscsi_target_device.c) 3 * 4 * This file contains the TCM Virtual Device and Disk Transport 5 * agnostic related functions. 6 * 7 * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc. 8 * Copyright (c) 2005-2006 SBE, Inc. All Rights Reserved. 9 * Copyright (c) 2007-2010 Rising Tide Systems 10 * Copyright (c) 2008-2010 Linux-iSCSI.org 11 * 12 * Nicholas A. Bellinger <nab@kernel.org> 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License as published by 16 * the Free Software Foundation; either version 2 of the License, or 17 * (at your option) any later version. 18 * 19 * This program is distributed in the hope that it will be useful, 20 * but WITHOUT ANY WARRANTY; without even the implied warranty of 21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 22 * GNU General Public License for more details. 23 * 24 * You should have received a copy of the GNU General Public License 25 * along with this program; if not, write to the Free Software 26 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 27 * 28 ******************************************************************************/ 29 30 #include <linux/net.h> 31 #include <linux/string.h> 32 #include <linux/delay.h> 33 #include <linux/timer.h> 34 #include <linux/slab.h> 35 #include <linux/spinlock.h> 36 #include <linux/kthread.h> 37 #include <linux/in.h> 38 #include <linux/export.h> 39 #include <net/sock.h> 40 #include <net/tcp.h> 41 #include <scsi/scsi.h> 42 #include <scsi/scsi_device.h> 43 44 #include <target/target_core_base.h> 45 #include <target/target_core_backend.h> 46 #include <target/target_core_fabric.h> 47 48 #include "target_core_internal.h" 49 #include "target_core_alua.h" 50 #include "target_core_pr.h" 51 #include "target_core_ua.h" 52 53 static void se_dev_start(struct se_device *dev); 54 static void se_dev_stop(struct se_device *dev); 55 56 static struct se_hba *lun0_hba; 57 static struct se_subsystem_dev *lun0_su_dev; 58 /* not static, needed by tpg.c */ 59 struct se_device *g_lun0_dev; 60 61 int transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun) 62 { 63 struct se_lun *se_lun = NULL; 64 struct se_session *se_sess = se_cmd->se_sess; 65 struct se_device *dev; 66 unsigned long flags; 67 68 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) { 69 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN; 70 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 71 return -ENODEV; 72 } 73 74 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags); 75 se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun]; 76 if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 77 struct se_dev_entry *deve = se_cmd->se_deve; 78 79 deve->total_cmds++; 80 deve->total_bytes += se_cmd->data_length; 81 82 if ((se_cmd->data_direction == DMA_TO_DEVICE) && 83 (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) { 84 se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED; 85 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 86 pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN" 87 " Access for 0x%08x\n", 88 se_cmd->se_tfo->get_fabric_name(), 89 unpacked_lun); 90 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); 91 return -EACCES; 92 } 93 94 if (se_cmd->data_direction == DMA_TO_DEVICE) 95 deve->write_bytes += se_cmd->data_length; 96 else if (se_cmd->data_direction == DMA_FROM_DEVICE) 97 deve->read_bytes += se_cmd->data_length; 98 99 deve->deve_cmds++; 100 101 se_lun = deve->se_lun; 102 se_cmd->se_lun = deve->se_lun; 103 se_cmd->pr_res_key = deve->pr_res_key; 104 se_cmd->orig_fe_lun = unpacked_lun; 105 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; 106 } 107 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); 108 109 if (!se_lun) { 110 /* 111 * Use the se_portal_group->tpg_virt_lun0 to allow for 112 * REPORT_LUNS, et al to be returned when no active 113 * MappedLUN=0 exists for this Initiator Port. 114 */ 115 if (unpacked_lun != 0) { 116 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN; 117 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 118 pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" 119 " Access for 0x%08x\n", 120 se_cmd->se_tfo->get_fabric_name(), 121 unpacked_lun); 122 return -ENODEV; 123 } 124 /* 125 * Force WRITE PROTECT for virtual LUN 0 126 */ 127 if ((se_cmd->data_direction != DMA_FROM_DEVICE) && 128 (se_cmd->data_direction != DMA_NONE)) { 129 se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED; 130 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 131 return -EACCES; 132 } 133 134 se_lun = &se_sess->se_tpg->tpg_virt_lun0; 135 se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0; 136 se_cmd->orig_fe_lun = 0; 137 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; 138 } 139 /* 140 * Determine if the struct se_lun is online. 141 * FIXME: Check for LUN_RESET + UNIT Attention 142 */ 143 if (se_dev_check_online(se_lun->lun_se_dev) != 0) { 144 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN; 145 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 146 return -ENODEV; 147 } 148 149 /* Directly associate cmd with se_dev */ 150 se_cmd->se_dev = se_lun->lun_se_dev; 151 152 /* TODO: get rid of this and use atomics for stats */ 153 dev = se_lun->lun_se_dev; 154 spin_lock_irqsave(&dev->stats_lock, flags); 155 dev->num_cmds++; 156 if (se_cmd->data_direction == DMA_TO_DEVICE) 157 dev->write_bytes += se_cmd->data_length; 158 else if (se_cmd->data_direction == DMA_FROM_DEVICE) 159 dev->read_bytes += se_cmd->data_length; 160 spin_unlock_irqrestore(&dev->stats_lock, flags); 161 162 spin_lock_irqsave(&se_lun->lun_cmd_lock, flags); 163 list_add_tail(&se_cmd->se_lun_node, &se_lun->lun_cmd_list); 164 spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags); 165 166 return 0; 167 } 168 EXPORT_SYMBOL(transport_lookup_cmd_lun); 169 170 int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun) 171 { 172 struct se_dev_entry *deve; 173 struct se_lun *se_lun = NULL; 174 struct se_session *se_sess = se_cmd->se_sess; 175 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req; 176 unsigned long flags; 177 178 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) { 179 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN; 180 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 181 return -ENODEV; 182 } 183 184 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags); 185 se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun]; 186 deve = se_cmd->se_deve; 187 188 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 189 se_tmr->tmr_lun = deve->se_lun; 190 se_cmd->se_lun = deve->se_lun; 191 se_lun = deve->se_lun; 192 se_cmd->pr_res_key = deve->pr_res_key; 193 se_cmd->orig_fe_lun = unpacked_lun; 194 } 195 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); 196 197 if (!se_lun) { 198 pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" 199 " Access for 0x%08x\n", 200 se_cmd->se_tfo->get_fabric_name(), 201 unpacked_lun); 202 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 203 return -ENODEV; 204 } 205 /* 206 * Determine if the struct se_lun is online. 207 * FIXME: Check for LUN_RESET + UNIT Attention 208 */ 209 if (se_dev_check_online(se_lun->lun_se_dev) != 0) { 210 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 211 return -ENODEV; 212 } 213 214 /* Directly associate cmd with se_dev */ 215 se_cmd->se_dev = se_lun->lun_se_dev; 216 se_tmr->tmr_dev = se_lun->lun_se_dev; 217 218 spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags); 219 list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list); 220 spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags); 221 222 return 0; 223 } 224 EXPORT_SYMBOL(transport_lookup_tmr_lun); 225 226 /* 227 * This function is called from core_scsi3_emulate_pro_register_and_move() 228 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count 229 * when a matching rtpi is found. 230 */ 231 struct se_dev_entry *core_get_se_deve_from_rtpi( 232 struct se_node_acl *nacl, 233 u16 rtpi) 234 { 235 struct se_dev_entry *deve; 236 struct se_lun *lun; 237 struct se_port *port; 238 struct se_portal_group *tpg = nacl->se_tpg; 239 u32 i; 240 241 spin_lock_irq(&nacl->device_list_lock); 242 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 243 deve = nacl->device_list[i]; 244 245 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 246 continue; 247 248 lun = deve->se_lun; 249 if (!lun) { 250 pr_err("%s device entries device pointer is" 251 " NULL, but Initiator has access.\n", 252 tpg->se_tpg_tfo->get_fabric_name()); 253 continue; 254 } 255 port = lun->lun_sep; 256 if (!port) { 257 pr_err("%s device entries device pointer is" 258 " NULL, but Initiator has access.\n", 259 tpg->se_tpg_tfo->get_fabric_name()); 260 continue; 261 } 262 if (port->sep_rtpi != rtpi) 263 continue; 264 265 atomic_inc(&deve->pr_ref_count); 266 smp_mb__after_atomic_inc(); 267 spin_unlock_irq(&nacl->device_list_lock); 268 269 return deve; 270 } 271 spin_unlock_irq(&nacl->device_list_lock); 272 273 return NULL; 274 } 275 276 int core_free_device_list_for_node( 277 struct se_node_acl *nacl, 278 struct se_portal_group *tpg) 279 { 280 struct se_dev_entry *deve; 281 struct se_lun *lun; 282 u32 i; 283 284 if (!nacl->device_list) 285 return 0; 286 287 spin_lock_irq(&nacl->device_list_lock); 288 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 289 deve = nacl->device_list[i]; 290 291 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 292 continue; 293 294 if (!deve->se_lun) { 295 pr_err("%s device entries device pointer is" 296 " NULL, but Initiator has access.\n", 297 tpg->se_tpg_tfo->get_fabric_name()); 298 continue; 299 } 300 lun = deve->se_lun; 301 302 spin_unlock_irq(&nacl->device_list_lock); 303 core_update_device_list_for_node(lun, NULL, deve->mapped_lun, 304 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0); 305 spin_lock_irq(&nacl->device_list_lock); 306 } 307 spin_unlock_irq(&nacl->device_list_lock); 308 309 array_free(nacl->device_list, TRANSPORT_MAX_LUNS_PER_TPG); 310 nacl->device_list = NULL; 311 312 return 0; 313 } 314 315 void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd) 316 { 317 struct se_dev_entry *deve; 318 unsigned long flags; 319 320 spin_lock_irqsave(&se_nacl->device_list_lock, flags); 321 deve = se_nacl->device_list[se_cmd->orig_fe_lun]; 322 deve->deve_cmds--; 323 spin_unlock_irqrestore(&se_nacl->device_list_lock, flags); 324 } 325 326 void core_update_device_list_access( 327 u32 mapped_lun, 328 u32 lun_access, 329 struct se_node_acl *nacl) 330 { 331 struct se_dev_entry *deve; 332 333 spin_lock_irq(&nacl->device_list_lock); 334 deve = nacl->device_list[mapped_lun]; 335 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 336 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 337 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 338 } else { 339 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 340 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 341 } 342 spin_unlock_irq(&nacl->device_list_lock); 343 } 344 345 /* core_update_device_list_for_node(): 346 * 347 * 348 */ 349 int core_update_device_list_for_node( 350 struct se_lun *lun, 351 struct se_lun_acl *lun_acl, 352 u32 mapped_lun, 353 u32 lun_access, 354 struct se_node_acl *nacl, 355 struct se_portal_group *tpg, 356 int enable) 357 { 358 struct se_port *port = lun->lun_sep; 359 struct se_dev_entry *deve = nacl->device_list[mapped_lun]; 360 int trans = 0; 361 /* 362 * If the MappedLUN entry is being disabled, the entry in 363 * port->sep_alua_list must be removed now before clearing the 364 * struct se_dev_entry pointers below as logic in 365 * core_alua_do_transition_tg_pt() depends on these being present. 366 */ 367 if (!enable) { 368 /* 369 * deve->se_lun_acl will be NULL for demo-mode created LUNs 370 * that have not been explicitly concerted to MappedLUNs -> 371 * struct se_lun_acl, but we remove deve->alua_port_list from 372 * port->sep_alua_list. This also means that active UAs and 373 * NodeACL context specific PR metadata for demo-mode 374 * MappedLUN *deve will be released below.. 375 */ 376 spin_lock_bh(&port->sep_alua_lock); 377 list_del(&deve->alua_port_list); 378 spin_unlock_bh(&port->sep_alua_lock); 379 } 380 381 spin_lock_irq(&nacl->device_list_lock); 382 if (enable) { 383 /* 384 * Check if the call is handling demo mode -> explict LUN ACL 385 * transition. This transition must be for the same struct se_lun 386 * + mapped_lun that was setup in demo mode.. 387 */ 388 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 389 if (deve->se_lun_acl != NULL) { 390 pr_err("struct se_dev_entry->se_lun_acl" 391 " already set for demo mode -> explict" 392 " LUN ACL transition\n"); 393 spin_unlock_irq(&nacl->device_list_lock); 394 return -EINVAL; 395 } 396 if (deve->se_lun != lun) { 397 pr_err("struct se_dev_entry->se_lun does" 398 " match passed struct se_lun for demo mode" 399 " -> explict LUN ACL transition\n"); 400 spin_unlock_irq(&nacl->device_list_lock); 401 return -EINVAL; 402 } 403 deve->se_lun_acl = lun_acl; 404 trans = 1; 405 } else { 406 deve->se_lun = lun; 407 deve->se_lun_acl = lun_acl; 408 deve->mapped_lun = mapped_lun; 409 deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS; 410 } 411 412 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 413 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 414 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 415 } else { 416 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 417 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 418 } 419 420 if (trans) { 421 spin_unlock_irq(&nacl->device_list_lock); 422 return 0; 423 } 424 deve->creation_time = get_jiffies_64(); 425 deve->attach_count++; 426 spin_unlock_irq(&nacl->device_list_lock); 427 428 spin_lock_bh(&port->sep_alua_lock); 429 list_add_tail(&deve->alua_port_list, &port->sep_alua_list); 430 spin_unlock_bh(&port->sep_alua_lock); 431 432 return 0; 433 } 434 /* 435 * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE 436 * PR operation to complete. 437 */ 438 spin_unlock_irq(&nacl->device_list_lock); 439 while (atomic_read(&deve->pr_ref_count) != 0) 440 cpu_relax(); 441 spin_lock_irq(&nacl->device_list_lock); 442 /* 443 * Disable struct se_dev_entry LUN ACL mapping 444 */ 445 core_scsi3_ua_release_all(deve); 446 deve->se_lun = NULL; 447 deve->se_lun_acl = NULL; 448 deve->lun_flags = 0; 449 deve->creation_time = 0; 450 deve->attach_count--; 451 spin_unlock_irq(&nacl->device_list_lock); 452 453 core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl); 454 return 0; 455 } 456 457 /* core_clear_lun_from_tpg(): 458 * 459 * 460 */ 461 void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg) 462 { 463 struct se_node_acl *nacl; 464 struct se_dev_entry *deve; 465 u32 i; 466 467 spin_lock_irq(&tpg->acl_node_lock); 468 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) { 469 spin_unlock_irq(&tpg->acl_node_lock); 470 471 spin_lock_irq(&nacl->device_list_lock); 472 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 473 deve = nacl->device_list[i]; 474 if (lun != deve->se_lun) 475 continue; 476 spin_unlock_irq(&nacl->device_list_lock); 477 478 core_update_device_list_for_node(lun, NULL, 479 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS, 480 nacl, tpg, 0); 481 482 spin_lock_irq(&nacl->device_list_lock); 483 } 484 spin_unlock_irq(&nacl->device_list_lock); 485 486 spin_lock_irq(&tpg->acl_node_lock); 487 } 488 spin_unlock_irq(&tpg->acl_node_lock); 489 } 490 491 static struct se_port *core_alloc_port(struct se_device *dev) 492 { 493 struct se_port *port, *port_tmp; 494 495 port = kzalloc(sizeof(struct se_port), GFP_KERNEL); 496 if (!port) { 497 pr_err("Unable to allocate struct se_port\n"); 498 return ERR_PTR(-ENOMEM); 499 } 500 INIT_LIST_HEAD(&port->sep_alua_list); 501 INIT_LIST_HEAD(&port->sep_list); 502 atomic_set(&port->sep_tg_pt_secondary_offline, 0); 503 spin_lock_init(&port->sep_alua_lock); 504 mutex_init(&port->sep_tg_pt_md_mutex); 505 506 spin_lock(&dev->se_port_lock); 507 if (dev->dev_port_count == 0x0000ffff) { 508 pr_warn("Reached dev->dev_port_count ==" 509 " 0x0000ffff\n"); 510 spin_unlock(&dev->se_port_lock); 511 return ERR_PTR(-ENOSPC); 512 } 513 again: 514 /* 515 * Allocate the next RELATIVE TARGET PORT IDENTIFER for this struct se_device 516 * Here is the table from spc4r17 section 7.7.3.8. 517 * 518 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field 519 * 520 * Code Description 521 * 0h Reserved 522 * 1h Relative port 1, historically known as port A 523 * 2h Relative port 2, historically known as port B 524 * 3h to FFFFh Relative port 3 through 65 535 525 */ 526 port->sep_rtpi = dev->dev_rpti_counter++; 527 if (!port->sep_rtpi) 528 goto again; 529 530 list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) { 531 /* 532 * Make sure RELATIVE TARGET PORT IDENTIFER is unique 533 * for 16-bit wrap.. 534 */ 535 if (port->sep_rtpi == port_tmp->sep_rtpi) 536 goto again; 537 } 538 spin_unlock(&dev->se_port_lock); 539 540 return port; 541 } 542 543 static void core_export_port( 544 struct se_device *dev, 545 struct se_portal_group *tpg, 546 struct se_port *port, 547 struct se_lun *lun) 548 { 549 struct se_subsystem_dev *su_dev = dev->se_sub_dev; 550 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL; 551 552 spin_lock(&dev->se_port_lock); 553 spin_lock(&lun->lun_sep_lock); 554 port->sep_tpg = tpg; 555 port->sep_lun = lun; 556 lun->lun_sep = port; 557 spin_unlock(&lun->lun_sep_lock); 558 559 list_add_tail(&port->sep_list, &dev->dev_sep_list); 560 spin_unlock(&dev->se_port_lock); 561 562 if (su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) { 563 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port); 564 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) { 565 pr_err("Unable to allocate t10_alua_tg_pt" 566 "_gp_member_t\n"); 567 return; 568 } 569 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 570 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem, 571 su_dev->t10_alua.default_tg_pt_gp); 572 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 573 pr_debug("%s/%s: Adding to default ALUA Target Port" 574 " Group: alua/default_tg_pt_gp\n", 575 dev->transport->name, tpg->se_tpg_tfo->get_fabric_name()); 576 } 577 578 dev->dev_port_count++; 579 port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFER */ 580 } 581 582 /* 583 * Called with struct se_device->se_port_lock spinlock held. 584 */ 585 static void core_release_port(struct se_device *dev, struct se_port *port) 586 __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock) 587 { 588 /* 589 * Wait for any port reference for PR ALL_TG_PT=1 operation 590 * to complete in __core_scsi3_alloc_registration() 591 */ 592 spin_unlock(&dev->se_port_lock); 593 if (atomic_read(&port->sep_tg_pt_ref_cnt)) 594 cpu_relax(); 595 spin_lock(&dev->se_port_lock); 596 597 core_alua_free_tg_pt_gp_mem(port); 598 599 list_del(&port->sep_list); 600 dev->dev_port_count--; 601 kfree(port); 602 } 603 604 int core_dev_export( 605 struct se_device *dev, 606 struct se_portal_group *tpg, 607 struct se_lun *lun) 608 { 609 struct se_port *port; 610 611 port = core_alloc_port(dev); 612 if (IS_ERR(port)) 613 return PTR_ERR(port); 614 615 lun->lun_se_dev = dev; 616 se_dev_start(dev); 617 618 atomic_inc(&dev->dev_export_obj.obj_access_count); 619 core_export_port(dev, tpg, port, lun); 620 return 0; 621 } 622 623 void core_dev_unexport( 624 struct se_device *dev, 625 struct se_portal_group *tpg, 626 struct se_lun *lun) 627 { 628 struct se_port *port = lun->lun_sep; 629 630 spin_lock(&lun->lun_sep_lock); 631 if (lun->lun_se_dev == NULL) { 632 spin_unlock(&lun->lun_sep_lock); 633 return; 634 } 635 spin_unlock(&lun->lun_sep_lock); 636 637 spin_lock(&dev->se_port_lock); 638 atomic_dec(&dev->dev_export_obj.obj_access_count); 639 core_release_port(dev, port); 640 spin_unlock(&dev->se_port_lock); 641 642 se_dev_stop(dev); 643 lun->lun_se_dev = NULL; 644 } 645 646 int target_report_luns(struct se_cmd *se_cmd) 647 { 648 struct se_dev_entry *deve; 649 struct se_session *se_sess = se_cmd->se_sess; 650 unsigned char *buf; 651 u32 lun_count = 0, offset = 8, i; 652 653 buf = transport_kmap_data_sg(se_cmd); 654 if (!buf) 655 return -ENOMEM; 656 657 /* 658 * If no struct se_session pointer is present, this struct se_cmd is 659 * coming via a target_core_mod PASSTHROUGH op, and not through 660 * a $FABRIC_MOD. In that case, report LUN=0 only. 661 */ 662 if (!se_sess) { 663 int_to_scsilun(0, (struct scsi_lun *)&buf[offset]); 664 lun_count = 1; 665 goto done; 666 } 667 668 spin_lock_irq(&se_sess->se_node_acl->device_list_lock); 669 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 670 deve = se_sess->se_node_acl->device_list[i]; 671 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 672 continue; 673 /* 674 * We determine the correct LUN LIST LENGTH even once we 675 * have reached the initial allocation length. 676 * See SPC2-R20 7.19. 677 */ 678 lun_count++; 679 if ((offset + 8) > se_cmd->data_length) 680 continue; 681 682 int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]); 683 offset += 8; 684 } 685 spin_unlock_irq(&se_sess->se_node_acl->device_list_lock); 686 687 /* 688 * See SPC3 r07, page 159. 689 */ 690 done: 691 lun_count *= 8; 692 buf[0] = ((lun_count >> 24) & 0xff); 693 buf[1] = ((lun_count >> 16) & 0xff); 694 buf[2] = ((lun_count >> 8) & 0xff); 695 buf[3] = (lun_count & 0xff); 696 transport_kunmap_data_sg(se_cmd); 697 698 target_complete_cmd(se_cmd, GOOD); 699 return 0; 700 } 701 702 /* se_release_device_for_hba(): 703 * 704 * 705 */ 706 void se_release_device_for_hba(struct se_device *dev) 707 { 708 struct se_hba *hba = dev->se_hba; 709 710 if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) || 711 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) || 712 (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) || 713 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) || 714 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED)) 715 se_dev_stop(dev); 716 717 if (dev->dev_ptr) { 718 kthread_stop(dev->process_thread); 719 if (dev->transport->free_device) 720 dev->transport->free_device(dev->dev_ptr); 721 } 722 723 spin_lock(&hba->device_lock); 724 list_del(&dev->dev_list); 725 hba->dev_count--; 726 spin_unlock(&hba->device_lock); 727 728 core_scsi3_free_all_registrations(dev); 729 se_release_vpd_for_dev(dev); 730 731 kfree(dev); 732 } 733 734 void se_release_vpd_for_dev(struct se_device *dev) 735 { 736 struct t10_vpd *vpd, *vpd_tmp; 737 738 spin_lock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock); 739 list_for_each_entry_safe(vpd, vpd_tmp, 740 &dev->se_sub_dev->t10_wwn.t10_vpd_list, vpd_list) { 741 list_del(&vpd->vpd_list); 742 kfree(vpd); 743 } 744 spin_unlock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock); 745 } 746 747 /* se_free_virtual_device(): 748 * 749 * Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers. 750 */ 751 int se_free_virtual_device(struct se_device *dev, struct se_hba *hba) 752 { 753 if (!list_empty(&dev->dev_sep_list)) 754 dump_stack(); 755 756 core_alua_free_lu_gp_mem(dev); 757 se_release_device_for_hba(dev); 758 759 return 0; 760 } 761 762 static void se_dev_start(struct se_device *dev) 763 { 764 struct se_hba *hba = dev->se_hba; 765 766 spin_lock(&hba->device_lock); 767 atomic_inc(&dev->dev_obj.obj_access_count); 768 if (atomic_read(&dev->dev_obj.obj_access_count) == 1) { 769 if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) { 770 dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED; 771 dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED; 772 } else if (dev->dev_status & 773 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) { 774 dev->dev_status &= 775 ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED; 776 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED; 777 } 778 } 779 spin_unlock(&hba->device_lock); 780 } 781 782 static void se_dev_stop(struct se_device *dev) 783 { 784 struct se_hba *hba = dev->se_hba; 785 786 spin_lock(&hba->device_lock); 787 atomic_dec(&dev->dev_obj.obj_access_count); 788 if (atomic_read(&dev->dev_obj.obj_access_count) == 0) { 789 if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) { 790 dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED; 791 dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED; 792 } else if (dev->dev_status & 793 TRANSPORT_DEVICE_OFFLINE_ACTIVATED) { 794 dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED; 795 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED; 796 } 797 } 798 spin_unlock(&hba->device_lock); 799 } 800 801 int se_dev_check_online(struct se_device *dev) 802 { 803 unsigned long flags; 804 int ret; 805 806 spin_lock_irqsave(&dev->dev_status_lock, flags); 807 ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) || 808 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1; 809 spin_unlock_irqrestore(&dev->dev_status_lock, flags); 810 811 return ret; 812 } 813 814 int se_dev_check_shutdown(struct se_device *dev) 815 { 816 int ret; 817 818 spin_lock_irq(&dev->dev_status_lock); 819 ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN); 820 spin_unlock_irq(&dev->dev_status_lock); 821 822 return ret; 823 } 824 825 u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size) 826 { 827 u32 tmp, aligned_max_sectors; 828 /* 829 * Limit max_sectors to a PAGE_SIZE aligned value for modern 830 * transport_allocate_data_tasks() operation. 831 */ 832 tmp = rounddown((max_sectors * block_size), PAGE_SIZE); 833 aligned_max_sectors = (tmp / block_size); 834 if (max_sectors != aligned_max_sectors) { 835 printk(KERN_INFO "Rounding down aligned max_sectors from %u" 836 " to %u\n", max_sectors, aligned_max_sectors); 837 return aligned_max_sectors; 838 } 839 840 return max_sectors; 841 } 842 843 void se_dev_set_default_attribs( 844 struct se_device *dev, 845 struct se_dev_limits *dev_limits) 846 { 847 struct queue_limits *limits = &dev_limits->limits; 848 849 dev->se_sub_dev->se_dev_attrib.emulate_dpo = DA_EMULATE_DPO; 850 dev->se_sub_dev->se_dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE; 851 dev->se_sub_dev->se_dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ; 852 dev->se_sub_dev->se_dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE; 853 dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL; 854 dev->se_sub_dev->se_dev_attrib.emulate_tas = DA_EMULATE_TAS; 855 dev->se_sub_dev->se_dev_attrib.emulate_tpu = DA_EMULATE_TPU; 856 dev->se_sub_dev->se_dev_attrib.emulate_tpws = DA_EMULATE_TPWS; 857 dev->se_sub_dev->se_dev_attrib.emulate_reservations = DA_EMULATE_RESERVATIONS; 858 dev->se_sub_dev->se_dev_attrib.emulate_alua = DA_EMULATE_ALUA; 859 dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS; 860 dev->se_sub_dev->se_dev_attrib.is_nonrot = DA_IS_NONROT; 861 dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD; 862 /* 863 * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK 864 * iblock_create_virtdevice() from struct queue_limits values 865 * if blk_queue_discard()==1 866 */ 867 dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT; 868 dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count = 869 DA_MAX_UNMAP_BLOCK_DESC_COUNT; 870 dev->se_sub_dev->se_dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT; 871 dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment = 872 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT; 873 /* 874 * block_size is based on subsystem plugin dependent requirements. 875 */ 876 dev->se_sub_dev->se_dev_attrib.hw_block_size = limits->logical_block_size; 877 dev->se_sub_dev->se_dev_attrib.block_size = limits->logical_block_size; 878 /* 879 * Align max_hw_sectors down to PAGE_SIZE I/O transfers 880 */ 881 limits->max_hw_sectors = se_dev_align_max_sectors(limits->max_hw_sectors, 882 limits->logical_block_size); 883 dev->se_sub_dev->se_dev_attrib.hw_max_sectors = limits->max_hw_sectors; 884 885 /* 886 * Set fabric_max_sectors, which is reported in block limits 887 * VPD page (B0h). 888 */ 889 dev->se_sub_dev->se_dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS; 890 /* 891 * Set optimal_sectors from fabric_max_sectors, which can be 892 * lowered via configfs. 893 */ 894 dev->se_sub_dev->se_dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS; 895 /* 896 * queue_depth is based on subsystem plugin dependent requirements. 897 */ 898 dev->se_sub_dev->se_dev_attrib.hw_queue_depth = dev_limits->hw_queue_depth; 899 dev->se_sub_dev->se_dev_attrib.queue_depth = dev_limits->queue_depth; 900 } 901 902 int se_dev_set_max_unmap_lba_count( 903 struct se_device *dev, 904 u32 max_unmap_lba_count) 905 { 906 dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = max_unmap_lba_count; 907 pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n", 908 dev, dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count); 909 return 0; 910 } 911 912 int se_dev_set_max_unmap_block_desc_count( 913 struct se_device *dev, 914 u32 max_unmap_block_desc_count) 915 { 916 dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count = 917 max_unmap_block_desc_count; 918 pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n", 919 dev, dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count); 920 return 0; 921 } 922 923 int se_dev_set_unmap_granularity( 924 struct se_device *dev, 925 u32 unmap_granularity) 926 { 927 dev->se_sub_dev->se_dev_attrib.unmap_granularity = unmap_granularity; 928 pr_debug("dev[%p]: Set unmap_granularity: %u\n", 929 dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity); 930 return 0; 931 } 932 933 int se_dev_set_unmap_granularity_alignment( 934 struct se_device *dev, 935 u32 unmap_granularity_alignment) 936 { 937 dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment; 938 pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n", 939 dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment); 940 return 0; 941 } 942 943 int se_dev_set_emulate_dpo(struct se_device *dev, int flag) 944 { 945 if (flag != 0 && flag != 1) { 946 pr_err("Illegal value %d\n", flag); 947 return -EINVAL; 948 } 949 950 if (flag) { 951 pr_err("dpo_emulated not supported\n"); 952 return -EINVAL; 953 } 954 955 return 0; 956 } 957 958 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag) 959 { 960 if (flag != 0 && flag != 1) { 961 pr_err("Illegal value %d\n", flag); 962 return -EINVAL; 963 } 964 965 if (flag && dev->transport->fua_write_emulated == 0) { 966 pr_err("fua_write_emulated not supported\n"); 967 return -EINVAL; 968 } 969 dev->se_sub_dev->se_dev_attrib.emulate_fua_write = flag; 970 pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n", 971 dev, dev->se_sub_dev->se_dev_attrib.emulate_fua_write); 972 return 0; 973 } 974 975 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag) 976 { 977 if (flag != 0 && flag != 1) { 978 pr_err("Illegal value %d\n", flag); 979 return -EINVAL; 980 } 981 982 if (flag) { 983 pr_err("ua read emulated not supported\n"); 984 return -EINVAL; 985 } 986 987 return 0; 988 } 989 990 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag) 991 { 992 if (flag != 0 && flag != 1) { 993 pr_err("Illegal value %d\n", flag); 994 return -EINVAL; 995 } 996 if (flag && dev->transport->write_cache_emulated == 0) { 997 pr_err("write_cache_emulated not supported\n"); 998 return -EINVAL; 999 } 1000 dev->se_sub_dev->se_dev_attrib.emulate_write_cache = flag; 1001 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 1002 dev, dev->se_sub_dev->se_dev_attrib.emulate_write_cache); 1003 return 0; 1004 } 1005 1006 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag) 1007 { 1008 if ((flag != 0) && (flag != 1) && (flag != 2)) { 1009 pr_err("Illegal value %d\n", flag); 1010 return -EINVAL; 1011 } 1012 1013 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1014 pr_err("dev[%p]: Unable to change SE Device" 1015 " UA_INTRLCK_CTRL while dev_export_obj: %d count" 1016 " exists\n", dev, 1017 atomic_read(&dev->dev_export_obj.obj_access_count)); 1018 return -EINVAL; 1019 } 1020 dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = flag; 1021 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 1022 dev, dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl); 1023 1024 return 0; 1025 } 1026 1027 int se_dev_set_emulate_tas(struct se_device *dev, int flag) 1028 { 1029 if ((flag != 0) && (flag != 1)) { 1030 pr_err("Illegal value %d\n", flag); 1031 return -EINVAL; 1032 } 1033 1034 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1035 pr_err("dev[%p]: Unable to change SE Device TAS while" 1036 " dev_export_obj: %d count exists\n", dev, 1037 atomic_read(&dev->dev_export_obj.obj_access_count)); 1038 return -EINVAL; 1039 } 1040 dev->se_sub_dev->se_dev_attrib.emulate_tas = flag; 1041 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 1042 dev, (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? "Enabled" : "Disabled"); 1043 1044 return 0; 1045 } 1046 1047 int se_dev_set_emulate_tpu(struct se_device *dev, int flag) 1048 { 1049 if ((flag != 0) && (flag != 1)) { 1050 pr_err("Illegal value %d\n", flag); 1051 return -EINVAL; 1052 } 1053 /* 1054 * We expect this value to be non-zero when generic Block Layer 1055 * Discard supported is detected iblock_create_virtdevice(). 1056 */ 1057 if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) { 1058 pr_err("Generic Block Discard not supported\n"); 1059 return -ENOSYS; 1060 } 1061 1062 dev->se_sub_dev->se_dev_attrib.emulate_tpu = flag; 1063 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 1064 dev, flag); 1065 return 0; 1066 } 1067 1068 int se_dev_set_emulate_tpws(struct se_device *dev, int flag) 1069 { 1070 if ((flag != 0) && (flag != 1)) { 1071 pr_err("Illegal value %d\n", flag); 1072 return -EINVAL; 1073 } 1074 /* 1075 * We expect this value to be non-zero when generic Block Layer 1076 * Discard supported is detected iblock_create_virtdevice(). 1077 */ 1078 if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) { 1079 pr_err("Generic Block Discard not supported\n"); 1080 return -ENOSYS; 1081 } 1082 1083 dev->se_sub_dev->se_dev_attrib.emulate_tpws = flag; 1084 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 1085 dev, flag); 1086 return 0; 1087 } 1088 1089 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag) 1090 { 1091 if ((flag != 0) && (flag != 1)) { 1092 pr_err("Illegal value %d\n", flag); 1093 return -EINVAL; 1094 } 1095 dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = flag; 1096 pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev, 1097 (dev->se_sub_dev->se_dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled"); 1098 return 0; 1099 } 1100 1101 int se_dev_set_is_nonrot(struct se_device *dev, int flag) 1102 { 1103 if ((flag != 0) && (flag != 1)) { 1104 printk(KERN_ERR "Illegal value %d\n", flag); 1105 return -EINVAL; 1106 } 1107 dev->se_sub_dev->se_dev_attrib.is_nonrot = flag; 1108 pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n", 1109 dev, flag); 1110 return 0; 1111 } 1112 1113 int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag) 1114 { 1115 if (flag != 0) { 1116 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted" 1117 " reordering not implemented\n", dev); 1118 return -ENOSYS; 1119 } 1120 dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = flag; 1121 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag); 1122 return 0; 1123 } 1124 1125 /* 1126 * Note, this can only be called on unexported SE Device Object. 1127 */ 1128 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth) 1129 { 1130 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1131 pr_err("dev[%p]: Unable to change SE Device TCQ while" 1132 " dev_export_obj: %d count exists\n", dev, 1133 atomic_read(&dev->dev_export_obj.obj_access_count)); 1134 return -EINVAL; 1135 } 1136 if (!queue_depth) { 1137 pr_err("dev[%p]: Illegal ZERO value for queue" 1138 "_depth\n", dev); 1139 return -EINVAL; 1140 } 1141 1142 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1143 if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) { 1144 pr_err("dev[%p]: Passed queue_depth: %u" 1145 " exceeds TCM/SE_Device TCQ: %u\n", 1146 dev, queue_depth, 1147 dev->se_sub_dev->se_dev_attrib.hw_queue_depth); 1148 return -EINVAL; 1149 } 1150 } else { 1151 if (queue_depth > dev->se_sub_dev->se_dev_attrib.queue_depth) { 1152 if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) { 1153 pr_err("dev[%p]: Passed queue_depth:" 1154 " %u exceeds TCM/SE_Device MAX" 1155 " TCQ: %u\n", dev, queue_depth, 1156 dev->se_sub_dev->se_dev_attrib.hw_queue_depth); 1157 return -EINVAL; 1158 } 1159 } 1160 } 1161 1162 dev->se_sub_dev->se_dev_attrib.queue_depth = dev->queue_depth = queue_depth; 1163 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", 1164 dev, queue_depth); 1165 return 0; 1166 } 1167 1168 int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors) 1169 { 1170 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1171 pr_err("dev[%p]: Unable to change SE Device" 1172 " fabric_max_sectors while dev_export_obj: %d count exists\n", 1173 dev, atomic_read(&dev->dev_export_obj.obj_access_count)); 1174 return -EINVAL; 1175 } 1176 if (!fabric_max_sectors) { 1177 pr_err("dev[%p]: Illegal ZERO value for" 1178 " fabric_max_sectors\n", dev); 1179 return -EINVAL; 1180 } 1181 if (fabric_max_sectors < DA_STATUS_MAX_SECTORS_MIN) { 1182 pr_err("dev[%p]: Passed fabric_max_sectors: %u less than" 1183 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, fabric_max_sectors, 1184 DA_STATUS_MAX_SECTORS_MIN); 1185 return -EINVAL; 1186 } 1187 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1188 if (fabric_max_sectors > dev->se_sub_dev->se_dev_attrib.hw_max_sectors) { 1189 pr_err("dev[%p]: Passed fabric_max_sectors: %u" 1190 " greater than TCM/SE_Device max_sectors:" 1191 " %u\n", dev, fabric_max_sectors, 1192 dev->se_sub_dev->se_dev_attrib.hw_max_sectors); 1193 return -EINVAL; 1194 } 1195 } else { 1196 if (fabric_max_sectors > DA_STATUS_MAX_SECTORS_MAX) { 1197 pr_err("dev[%p]: Passed fabric_max_sectors: %u" 1198 " greater than DA_STATUS_MAX_SECTORS_MAX:" 1199 " %u\n", dev, fabric_max_sectors, 1200 DA_STATUS_MAX_SECTORS_MAX); 1201 return -EINVAL; 1202 } 1203 } 1204 /* 1205 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks() 1206 */ 1207 fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors, 1208 dev->se_sub_dev->se_dev_attrib.block_size); 1209 1210 dev->se_sub_dev->se_dev_attrib.fabric_max_sectors = fabric_max_sectors; 1211 pr_debug("dev[%p]: SE Device max_sectors changed to %u\n", 1212 dev, fabric_max_sectors); 1213 return 0; 1214 } 1215 1216 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors) 1217 { 1218 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1219 pr_err("dev[%p]: Unable to change SE Device" 1220 " optimal_sectors while dev_export_obj: %d count exists\n", 1221 dev, atomic_read(&dev->dev_export_obj.obj_access_count)); 1222 return -EINVAL; 1223 } 1224 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1225 pr_err("dev[%p]: Passed optimal_sectors cannot be" 1226 " changed for TCM/pSCSI\n", dev); 1227 return -EINVAL; 1228 } 1229 if (optimal_sectors > dev->se_sub_dev->se_dev_attrib.fabric_max_sectors) { 1230 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1231 " greater than fabric_max_sectors: %u\n", dev, 1232 optimal_sectors, dev->se_sub_dev->se_dev_attrib.fabric_max_sectors); 1233 return -EINVAL; 1234 } 1235 1236 dev->se_sub_dev->se_dev_attrib.optimal_sectors = optimal_sectors; 1237 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1238 dev, optimal_sectors); 1239 return 0; 1240 } 1241 1242 int se_dev_set_block_size(struct se_device *dev, u32 block_size) 1243 { 1244 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1245 pr_err("dev[%p]: Unable to change SE Device block_size" 1246 " while dev_export_obj: %d count exists\n", dev, 1247 atomic_read(&dev->dev_export_obj.obj_access_count)); 1248 return -EINVAL; 1249 } 1250 1251 if ((block_size != 512) && 1252 (block_size != 1024) && 1253 (block_size != 2048) && 1254 (block_size != 4096)) { 1255 pr_err("dev[%p]: Illegal value for block_device: %u" 1256 " for SE device, must be 512, 1024, 2048 or 4096\n", 1257 dev, block_size); 1258 return -EINVAL; 1259 } 1260 1261 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1262 pr_err("dev[%p]: Not allowed to change block_size for" 1263 " Physical Device, use for Linux/SCSI to change" 1264 " block_size for underlying hardware\n", dev); 1265 return -EINVAL; 1266 } 1267 1268 dev->se_sub_dev->se_dev_attrib.block_size = block_size; 1269 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1270 dev, block_size); 1271 return 0; 1272 } 1273 1274 struct se_lun *core_dev_add_lun( 1275 struct se_portal_group *tpg, 1276 struct se_hba *hba, 1277 struct se_device *dev, 1278 u32 lun) 1279 { 1280 struct se_lun *lun_p; 1281 int rc; 1282 1283 if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) { 1284 pr_err("Unable to export struct se_device while dev_access_obj: %d\n", 1285 atomic_read(&dev->dev_access_obj.obj_access_count)); 1286 return ERR_PTR(-EACCES); 1287 } 1288 1289 lun_p = core_tpg_pre_addlun(tpg, lun); 1290 if (IS_ERR(lun_p)) 1291 return lun_p; 1292 1293 rc = core_tpg_post_addlun(tpg, lun_p, 1294 TRANSPORT_LUNFLAGS_READ_WRITE, dev); 1295 if (rc < 0) 1296 return ERR_PTR(rc); 1297 1298 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from" 1299 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1300 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun_p->unpacked_lun, 1301 tpg->se_tpg_tfo->get_fabric_name(), hba->hba_id); 1302 /* 1303 * Update LUN maps for dynamically added initiators when 1304 * generate_node_acl is enabled. 1305 */ 1306 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) { 1307 struct se_node_acl *acl; 1308 spin_lock_irq(&tpg->acl_node_lock); 1309 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { 1310 if (acl->dynamic_node_acl && 1311 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only || 1312 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) { 1313 spin_unlock_irq(&tpg->acl_node_lock); 1314 core_tpg_add_node_to_devs(acl, tpg); 1315 spin_lock_irq(&tpg->acl_node_lock); 1316 } 1317 } 1318 spin_unlock_irq(&tpg->acl_node_lock); 1319 } 1320 1321 return lun_p; 1322 } 1323 1324 /* core_dev_del_lun(): 1325 * 1326 * 1327 */ 1328 int core_dev_del_lun( 1329 struct se_portal_group *tpg, 1330 u32 unpacked_lun) 1331 { 1332 struct se_lun *lun; 1333 1334 lun = core_tpg_pre_dellun(tpg, unpacked_lun); 1335 if (IS_ERR(lun)) 1336 return PTR_ERR(lun); 1337 1338 core_tpg_post_dellun(tpg, lun); 1339 1340 pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from" 1341 " device object\n", tpg->se_tpg_tfo->get_fabric_name(), 1342 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, 1343 tpg->se_tpg_tfo->get_fabric_name()); 1344 1345 return 0; 1346 } 1347 1348 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun) 1349 { 1350 struct se_lun *lun; 1351 1352 spin_lock(&tpg->tpg_lun_lock); 1353 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1354 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS" 1355 "_PER_TPG-1: %u for Target Portal Group: %hu\n", 1356 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1357 TRANSPORT_MAX_LUNS_PER_TPG-1, 1358 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1359 spin_unlock(&tpg->tpg_lun_lock); 1360 return NULL; 1361 } 1362 lun = tpg->tpg_lun_list[unpacked_lun]; 1363 1364 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) { 1365 pr_err("%s Logical Unit Number: %u is not free on" 1366 " Target Portal Group: %hu, ignoring request.\n", 1367 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1368 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1369 spin_unlock(&tpg->tpg_lun_lock); 1370 return NULL; 1371 } 1372 spin_unlock(&tpg->tpg_lun_lock); 1373 1374 return lun; 1375 } 1376 1377 /* core_dev_get_lun(): 1378 * 1379 * 1380 */ 1381 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun) 1382 { 1383 struct se_lun *lun; 1384 1385 spin_lock(&tpg->tpg_lun_lock); 1386 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1387 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER" 1388 "_TPG-1: %u for Target Portal Group: %hu\n", 1389 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1390 TRANSPORT_MAX_LUNS_PER_TPG-1, 1391 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1392 spin_unlock(&tpg->tpg_lun_lock); 1393 return NULL; 1394 } 1395 lun = tpg->tpg_lun_list[unpacked_lun]; 1396 1397 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { 1398 pr_err("%s Logical Unit Number: %u is not active on" 1399 " Target Portal Group: %hu, ignoring request.\n", 1400 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1401 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1402 spin_unlock(&tpg->tpg_lun_lock); 1403 return NULL; 1404 } 1405 spin_unlock(&tpg->tpg_lun_lock); 1406 1407 return lun; 1408 } 1409 1410 struct se_lun_acl *core_dev_init_initiator_node_lun_acl( 1411 struct se_portal_group *tpg, 1412 u32 mapped_lun, 1413 char *initiatorname, 1414 int *ret) 1415 { 1416 struct se_lun_acl *lacl; 1417 struct se_node_acl *nacl; 1418 1419 if (strlen(initiatorname) >= TRANSPORT_IQN_LEN) { 1420 pr_err("%s InitiatorName exceeds maximum size.\n", 1421 tpg->se_tpg_tfo->get_fabric_name()); 1422 *ret = -EOVERFLOW; 1423 return NULL; 1424 } 1425 nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname); 1426 if (!nacl) { 1427 *ret = -EINVAL; 1428 return NULL; 1429 } 1430 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL); 1431 if (!lacl) { 1432 pr_err("Unable to allocate memory for struct se_lun_acl.\n"); 1433 *ret = -ENOMEM; 1434 return NULL; 1435 } 1436 1437 INIT_LIST_HEAD(&lacl->lacl_list); 1438 lacl->mapped_lun = mapped_lun; 1439 lacl->se_lun_nacl = nacl; 1440 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); 1441 1442 return lacl; 1443 } 1444 1445 int core_dev_add_initiator_node_lun_acl( 1446 struct se_portal_group *tpg, 1447 struct se_lun_acl *lacl, 1448 u32 unpacked_lun, 1449 u32 lun_access) 1450 { 1451 struct se_lun *lun; 1452 struct se_node_acl *nacl; 1453 1454 lun = core_dev_get_lun(tpg, unpacked_lun); 1455 if (!lun) { 1456 pr_err("%s Logical Unit Number: %u is not active on" 1457 " Target Portal Group: %hu, ignoring request.\n", 1458 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1459 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1460 return -EINVAL; 1461 } 1462 1463 nacl = lacl->se_lun_nacl; 1464 if (!nacl) 1465 return -EINVAL; 1466 1467 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) && 1468 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE)) 1469 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; 1470 1471 lacl->se_lun = lun; 1472 1473 if (core_update_device_list_for_node(lun, lacl, lacl->mapped_lun, 1474 lun_access, nacl, tpg, 1) < 0) 1475 return -EINVAL; 1476 1477 spin_lock(&lun->lun_acl_lock); 1478 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list); 1479 atomic_inc(&lun->lun_acl_count); 1480 smp_mb__after_atomic_inc(); 1481 spin_unlock(&lun->lun_acl_lock); 1482 1483 pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for " 1484 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(), 1485 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun, 1486 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO", 1487 lacl->initiatorname); 1488 /* 1489 * Check to see if there are any existing persistent reservation APTPL 1490 * pre-registrations that need to be enabled for this LUN ACL.. 1491 */ 1492 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl); 1493 return 0; 1494 } 1495 1496 /* core_dev_del_initiator_node_lun_acl(): 1497 * 1498 * 1499 */ 1500 int core_dev_del_initiator_node_lun_acl( 1501 struct se_portal_group *tpg, 1502 struct se_lun *lun, 1503 struct se_lun_acl *lacl) 1504 { 1505 struct se_node_acl *nacl; 1506 1507 nacl = lacl->se_lun_nacl; 1508 if (!nacl) 1509 return -EINVAL; 1510 1511 spin_lock(&lun->lun_acl_lock); 1512 list_del(&lacl->lacl_list); 1513 atomic_dec(&lun->lun_acl_count); 1514 smp_mb__after_atomic_dec(); 1515 spin_unlock(&lun->lun_acl_lock); 1516 1517 core_update_device_list_for_node(lun, NULL, lacl->mapped_lun, 1518 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0); 1519 1520 lacl->se_lun = NULL; 1521 1522 pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for" 1523 " InitiatorNode: %s Mapped LUN: %u\n", 1524 tpg->se_tpg_tfo->get_fabric_name(), 1525 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, 1526 lacl->initiatorname, lacl->mapped_lun); 1527 1528 return 0; 1529 } 1530 1531 void core_dev_free_initiator_node_lun_acl( 1532 struct se_portal_group *tpg, 1533 struct se_lun_acl *lacl) 1534 { 1535 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s" 1536 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1537 tpg->se_tpg_tfo->tpg_get_tag(tpg), 1538 tpg->se_tpg_tfo->get_fabric_name(), 1539 lacl->initiatorname, lacl->mapped_lun); 1540 1541 kfree(lacl); 1542 } 1543 1544 int core_dev_setup_virtual_lun0(void) 1545 { 1546 struct se_hba *hba; 1547 struct se_device *dev; 1548 struct se_subsystem_dev *se_dev = NULL; 1549 struct se_subsystem_api *t; 1550 char buf[16]; 1551 int ret; 1552 1553 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE); 1554 if (IS_ERR(hba)) 1555 return PTR_ERR(hba); 1556 1557 lun0_hba = hba; 1558 t = hba->transport; 1559 1560 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL); 1561 if (!se_dev) { 1562 pr_err("Unable to allocate memory for" 1563 " struct se_subsystem_dev\n"); 1564 ret = -ENOMEM; 1565 goto out; 1566 } 1567 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list); 1568 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock); 1569 INIT_LIST_HEAD(&se_dev->t10_pr.registration_list); 1570 INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list); 1571 spin_lock_init(&se_dev->t10_pr.registration_lock); 1572 spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock); 1573 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list); 1574 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock); 1575 spin_lock_init(&se_dev->se_dev_lock); 1576 se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN; 1577 se_dev->t10_wwn.t10_sub_dev = se_dev; 1578 se_dev->t10_alua.t10_sub_dev = se_dev; 1579 se_dev->se_dev_attrib.da_sub_dev = se_dev; 1580 se_dev->se_dev_hba = hba; 1581 1582 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0"); 1583 if (!se_dev->se_dev_su_ptr) { 1584 pr_err("Unable to locate subsystem dependent pointer" 1585 " from allocate_virtdevice()\n"); 1586 ret = -ENOMEM; 1587 goto out; 1588 } 1589 lun0_su_dev = se_dev; 1590 1591 memset(buf, 0, 16); 1592 sprintf(buf, "rd_pages=8"); 1593 t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf)); 1594 1595 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr); 1596 if (IS_ERR(dev)) { 1597 ret = PTR_ERR(dev); 1598 goto out; 1599 } 1600 se_dev->se_dev_ptr = dev; 1601 g_lun0_dev = dev; 1602 1603 return 0; 1604 out: 1605 lun0_su_dev = NULL; 1606 kfree(se_dev); 1607 if (lun0_hba) { 1608 core_delete_hba(lun0_hba); 1609 lun0_hba = NULL; 1610 } 1611 return ret; 1612 } 1613 1614 1615 void core_dev_release_virtual_lun0(void) 1616 { 1617 struct se_hba *hba = lun0_hba; 1618 struct se_subsystem_dev *su_dev = lun0_su_dev; 1619 1620 if (!hba) 1621 return; 1622 1623 if (g_lun0_dev) 1624 se_free_virtual_device(g_lun0_dev, hba); 1625 1626 kfree(su_dev); 1627 core_delete_hba(hba); 1628 } 1629