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_task *se_task) 647 { 648 struct se_cmd *se_cmd = se_task->task_se_cmd; 649 struct se_dev_entry *deve; 650 struct se_session *se_sess = se_cmd->se_sess; 651 unsigned char *buf; 652 u32 lun_count = 0, offset = 8, i; 653 654 buf = transport_kmap_data_sg(se_cmd); 655 if (!buf) 656 return -ENOMEM; 657 658 /* 659 * If no struct se_session pointer is present, this struct se_cmd is 660 * coming via a target_core_mod PASSTHROUGH op, and not through 661 * a $FABRIC_MOD. In that case, report LUN=0 only. 662 */ 663 if (!se_sess) { 664 int_to_scsilun(0, (struct scsi_lun *)&buf[offset]); 665 lun_count = 1; 666 goto done; 667 } 668 669 spin_lock_irq(&se_sess->se_node_acl->device_list_lock); 670 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 671 deve = se_sess->se_node_acl->device_list[i]; 672 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 673 continue; 674 /* 675 * We determine the correct LUN LIST LENGTH even once we 676 * have reached the initial allocation length. 677 * See SPC2-R20 7.19. 678 */ 679 lun_count++; 680 if ((offset + 8) > se_cmd->data_length) 681 continue; 682 683 int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]); 684 offset += 8; 685 } 686 spin_unlock_irq(&se_sess->se_node_acl->device_list_lock); 687 688 /* 689 * See SPC3 r07, page 159. 690 */ 691 done: 692 lun_count *= 8; 693 buf[0] = ((lun_count >> 24) & 0xff); 694 buf[1] = ((lun_count >> 16) & 0xff); 695 buf[2] = ((lun_count >> 8) & 0xff); 696 buf[3] = (lun_count & 0xff); 697 transport_kunmap_data_sg(se_cmd); 698 699 se_task->task_scsi_status = GOOD; 700 transport_complete_task(se_task, 1); 701 return 0; 702 } 703 704 /* se_release_device_for_hba(): 705 * 706 * 707 */ 708 void se_release_device_for_hba(struct se_device *dev) 709 { 710 struct se_hba *hba = dev->se_hba; 711 712 if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) || 713 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) || 714 (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) || 715 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) || 716 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED)) 717 se_dev_stop(dev); 718 719 if (dev->dev_ptr) { 720 kthread_stop(dev->process_thread); 721 if (dev->transport->free_device) 722 dev->transport->free_device(dev->dev_ptr); 723 } 724 725 spin_lock(&hba->device_lock); 726 list_del(&dev->dev_list); 727 hba->dev_count--; 728 spin_unlock(&hba->device_lock); 729 730 core_scsi3_free_all_registrations(dev); 731 se_release_vpd_for_dev(dev); 732 733 kfree(dev); 734 } 735 736 void se_release_vpd_for_dev(struct se_device *dev) 737 { 738 struct t10_vpd *vpd, *vpd_tmp; 739 740 spin_lock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock); 741 list_for_each_entry_safe(vpd, vpd_tmp, 742 &dev->se_sub_dev->t10_wwn.t10_vpd_list, vpd_list) { 743 list_del(&vpd->vpd_list); 744 kfree(vpd); 745 } 746 spin_unlock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock); 747 } 748 749 /* se_free_virtual_device(): 750 * 751 * Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers. 752 */ 753 int se_free_virtual_device(struct se_device *dev, struct se_hba *hba) 754 { 755 if (!list_empty(&dev->dev_sep_list)) 756 dump_stack(); 757 758 core_alua_free_lu_gp_mem(dev); 759 se_release_device_for_hba(dev); 760 761 return 0; 762 } 763 764 static void se_dev_start(struct se_device *dev) 765 { 766 struct se_hba *hba = dev->se_hba; 767 768 spin_lock(&hba->device_lock); 769 atomic_inc(&dev->dev_obj.obj_access_count); 770 if (atomic_read(&dev->dev_obj.obj_access_count) == 1) { 771 if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) { 772 dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED; 773 dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED; 774 } else if (dev->dev_status & 775 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) { 776 dev->dev_status &= 777 ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED; 778 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED; 779 } 780 } 781 spin_unlock(&hba->device_lock); 782 } 783 784 static void se_dev_stop(struct se_device *dev) 785 { 786 struct se_hba *hba = dev->se_hba; 787 788 spin_lock(&hba->device_lock); 789 atomic_dec(&dev->dev_obj.obj_access_count); 790 if (atomic_read(&dev->dev_obj.obj_access_count) == 0) { 791 if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) { 792 dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED; 793 dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED; 794 } else if (dev->dev_status & 795 TRANSPORT_DEVICE_OFFLINE_ACTIVATED) { 796 dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED; 797 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED; 798 } 799 } 800 spin_unlock(&hba->device_lock); 801 } 802 803 int se_dev_check_online(struct se_device *dev) 804 { 805 unsigned long flags; 806 int ret; 807 808 spin_lock_irqsave(&dev->dev_status_lock, flags); 809 ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) || 810 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1; 811 spin_unlock_irqrestore(&dev->dev_status_lock, flags); 812 813 return ret; 814 } 815 816 int se_dev_check_shutdown(struct se_device *dev) 817 { 818 int ret; 819 820 spin_lock_irq(&dev->dev_status_lock); 821 ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN); 822 spin_unlock_irq(&dev->dev_status_lock); 823 824 return ret; 825 } 826 827 u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size) 828 { 829 u32 tmp, aligned_max_sectors; 830 /* 831 * Limit max_sectors to a PAGE_SIZE aligned value for modern 832 * transport_allocate_data_tasks() operation. 833 */ 834 tmp = rounddown((max_sectors * block_size), PAGE_SIZE); 835 aligned_max_sectors = (tmp / block_size); 836 if (max_sectors != aligned_max_sectors) { 837 printk(KERN_INFO "Rounding down aligned max_sectors from %u" 838 " to %u\n", max_sectors, aligned_max_sectors); 839 return aligned_max_sectors; 840 } 841 842 return max_sectors; 843 } 844 845 void se_dev_set_default_attribs( 846 struct se_device *dev, 847 struct se_dev_limits *dev_limits) 848 { 849 struct queue_limits *limits = &dev_limits->limits; 850 851 dev->se_sub_dev->se_dev_attrib.emulate_dpo = DA_EMULATE_DPO; 852 dev->se_sub_dev->se_dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE; 853 dev->se_sub_dev->se_dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ; 854 dev->se_sub_dev->se_dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE; 855 dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL; 856 dev->se_sub_dev->se_dev_attrib.emulate_tas = DA_EMULATE_TAS; 857 dev->se_sub_dev->se_dev_attrib.emulate_tpu = DA_EMULATE_TPU; 858 dev->se_sub_dev->se_dev_attrib.emulate_tpws = DA_EMULATE_TPWS; 859 dev->se_sub_dev->se_dev_attrib.emulate_reservations = DA_EMULATE_RESERVATIONS; 860 dev->se_sub_dev->se_dev_attrib.emulate_alua = DA_EMULATE_ALUA; 861 dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS; 862 dev->se_sub_dev->se_dev_attrib.is_nonrot = DA_IS_NONROT; 863 dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD; 864 /* 865 * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK 866 * iblock_create_virtdevice() from struct queue_limits values 867 * if blk_queue_discard()==1 868 */ 869 dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT; 870 dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count = 871 DA_MAX_UNMAP_BLOCK_DESC_COUNT; 872 dev->se_sub_dev->se_dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT; 873 dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment = 874 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT; 875 /* 876 * block_size is based on subsystem plugin dependent requirements. 877 */ 878 dev->se_sub_dev->se_dev_attrib.hw_block_size = limits->logical_block_size; 879 dev->se_sub_dev->se_dev_attrib.block_size = limits->logical_block_size; 880 /* 881 * max_sectors is based on subsystem plugin dependent requirements. 882 */ 883 dev->se_sub_dev->se_dev_attrib.hw_max_sectors = limits->max_hw_sectors; 884 /* 885 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks() 886 */ 887 limits->max_sectors = se_dev_align_max_sectors(limits->max_sectors, 888 limits->logical_block_size); 889 dev->se_sub_dev->se_dev_attrib.max_sectors = limits->max_sectors; 890 /* 891 * Set fabric_max_sectors, which is reported in block limits 892 * VPD page (B0h). 893 */ 894 dev->se_sub_dev->se_dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS; 895 /* 896 * Set optimal_sectors from fabric_max_sectors, which can be 897 * lowered via configfs. 898 */ 899 dev->se_sub_dev->se_dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS; 900 /* 901 * queue_depth is based on subsystem plugin dependent requirements. 902 */ 903 dev->se_sub_dev->se_dev_attrib.hw_queue_depth = dev_limits->hw_queue_depth; 904 dev->se_sub_dev->se_dev_attrib.queue_depth = dev_limits->queue_depth; 905 } 906 907 int se_dev_set_max_unmap_lba_count( 908 struct se_device *dev, 909 u32 max_unmap_lba_count) 910 { 911 dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = max_unmap_lba_count; 912 pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n", 913 dev, dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count); 914 return 0; 915 } 916 917 int se_dev_set_max_unmap_block_desc_count( 918 struct se_device *dev, 919 u32 max_unmap_block_desc_count) 920 { 921 dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count = 922 max_unmap_block_desc_count; 923 pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n", 924 dev, dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count); 925 return 0; 926 } 927 928 int se_dev_set_unmap_granularity( 929 struct se_device *dev, 930 u32 unmap_granularity) 931 { 932 dev->se_sub_dev->se_dev_attrib.unmap_granularity = unmap_granularity; 933 pr_debug("dev[%p]: Set unmap_granularity: %u\n", 934 dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity); 935 return 0; 936 } 937 938 int se_dev_set_unmap_granularity_alignment( 939 struct se_device *dev, 940 u32 unmap_granularity_alignment) 941 { 942 dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment; 943 pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n", 944 dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment); 945 return 0; 946 } 947 948 int se_dev_set_emulate_dpo(struct se_device *dev, int flag) 949 { 950 if (flag != 0 && flag != 1) { 951 pr_err("Illegal value %d\n", flag); 952 return -EINVAL; 953 } 954 955 if (flag) { 956 pr_err("dpo_emulated not supported\n"); 957 return -EINVAL; 958 } 959 960 return 0; 961 } 962 963 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag) 964 { 965 if (flag != 0 && flag != 1) { 966 pr_err("Illegal value %d\n", flag); 967 return -EINVAL; 968 } 969 970 if (flag && dev->transport->fua_write_emulated == 0) { 971 pr_err("fua_write_emulated not supported\n"); 972 return -EINVAL; 973 } 974 dev->se_sub_dev->se_dev_attrib.emulate_fua_write = flag; 975 pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n", 976 dev, dev->se_sub_dev->se_dev_attrib.emulate_fua_write); 977 return 0; 978 } 979 980 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag) 981 { 982 if (flag != 0 && flag != 1) { 983 pr_err("Illegal value %d\n", flag); 984 return -EINVAL; 985 } 986 987 if (flag) { 988 pr_err("ua read emulated not supported\n"); 989 return -EINVAL; 990 } 991 992 return 0; 993 } 994 995 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag) 996 { 997 if (flag != 0 && flag != 1) { 998 pr_err("Illegal value %d\n", flag); 999 return -EINVAL; 1000 } 1001 if (flag && dev->transport->write_cache_emulated == 0) { 1002 pr_err("write_cache_emulated not supported\n"); 1003 return -EINVAL; 1004 } 1005 dev->se_sub_dev->se_dev_attrib.emulate_write_cache = flag; 1006 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 1007 dev, dev->se_sub_dev->se_dev_attrib.emulate_write_cache); 1008 return 0; 1009 } 1010 1011 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag) 1012 { 1013 if ((flag != 0) && (flag != 1) && (flag != 2)) { 1014 pr_err("Illegal value %d\n", flag); 1015 return -EINVAL; 1016 } 1017 1018 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1019 pr_err("dev[%p]: Unable to change SE Device" 1020 " UA_INTRLCK_CTRL while dev_export_obj: %d count" 1021 " exists\n", dev, 1022 atomic_read(&dev->dev_export_obj.obj_access_count)); 1023 return -EINVAL; 1024 } 1025 dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = flag; 1026 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 1027 dev, dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl); 1028 1029 return 0; 1030 } 1031 1032 int se_dev_set_emulate_tas(struct se_device *dev, int flag) 1033 { 1034 if ((flag != 0) && (flag != 1)) { 1035 pr_err("Illegal value %d\n", flag); 1036 return -EINVAL; 1037 } 1038 1039 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1040 pr_err("dev[%p]: Unable to change SE Device TAS while" 1041 " dev_export_obj: %d count exists\n", dev, 1042 atomic_read(&dev->dev_export_obj.obj_access_count)); 1043 return -EINVAL; 1044 } 1045 dev->se_sub_dev->se_dev_attrib.emulate_tas = flag; 1046 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 1047 dev, (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? "Enabled" : "Disabled"); 1048 1049 return 0; 1050 } 1051 1052 int se_dev_set_emulate_tpu(struct se_device *dev, int flag) 1053 { 1054 if ((flag != 0) && (flag != 1)) { 1055 pr_err("Illegal value %d\n", flag); 1056 return -EINVAL; 1057 } 1058 /* 1059 * We expect this value to be non-zero when generic Block Layer 1060 * Discard supported is detected iblock_create_virtdevice(). 1061 */ 1062 if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) { 1063 pr_err("Generic Block Discard not supported\n"); 1064 return -ENOSYS; 1065 } 1066 1067 dev->se_sub_dev->se_dev_attrib.emulate_tpu = flag; 1068 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 1069 dev, flag); 1070 return 0; 1071 } 1072 1073 int se_dev_set_emulate_tpws(struct se_device *dev, int flag) 1074 { 1075 if ((flag != 0) && (flag != 1)) { 1076 pr_err("Illegal value %d\n", flag); 1077 return -EINVAL; 1078 } 1079 /* 1080 * We expect this value to be non-zero when generic Block Layer 1081 * Discard supported is detected iblock_create_virtdevice(). 1082 */ 1083 if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) { 1084 pr_err("Generic Block Discard not supported\n"); 1085 return -ENOSYS; 1086 } 1087 1088 dev->se_sub_dev->se_dev_attrib.emulate_tpws = flag; 1089 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 1090 dev, flag); 1091 return 0; 1092 } 1093 1094 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag) 1095 { 1096 if ((flag != 0) && (flag != 1)) { 1097 pr_err("Illegal value %d\n", flag); 1098 return -EINVAL; 1099 } 1100 dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = flag; 1101 pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev, 1102 (dev->se_sub_dev->se_dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled"); 1103 return 0; 1104 } 1105 1106 int se_dev_set_is_nonrot(struct se_device *dev, int flag) 1107 { 1108 if ((flag != 0) && (flag != 1)) { 1109 printk(KERN_ERR "Illegal value %d\n", flag); 1110 return -EINVAL; 1111 } 1112 dev->se_sub_dev->se_dev_attrib.is_nonrot = flag; 1113 pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n", 1114 dev, flag); 1115 return 0; 1116 } 1117 1118 int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag) 1119 { 1120 if (flag != 0) { 1121 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted" 1122 " reordering not implemented\n", dev); 1123 return -ENOSYS; 1124 } 1125 dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = flag; 1126 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag); 1127 return 0; 1128 } 1129 1130 /* 1131 * Note, this can only be called on unexported SE Device Object. 1132 */ 1133 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth) 1134 { 1135 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1136 pr_err("dev[%p]: Unable to change SE Device TCQ while" 1137 " dev_export_obj: %d count exists\n", dev, 1138 atomic_read(&dev->dev_export_obj.obj_access_count)); 1139 return -EINVAL; 1140 } 1141 if (!queue_depth) { 1142 pr_err("dev[%p]: Illegal ZERO value for queue" 1143 "_depth\n", dev); 1144 return -EINVAL; 1145 } 1146 1147 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1148 if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) { 1149 pr_err("dev[%p]: Passed queue_depth: %u" 1150 " exceeds TCM/SE_Device TCQ: %u\n", 1151 dev, queue_depth, 1152 dev->se_sub_dev->se_dev_attrib.hw_queue_depth); 1153 return -EINVAL; 1154 } 1155 } else { 1156 if (queue_depth > dev->se_sub_dev->se_dev_attrib.queue_depth) { 1157 if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) { 1158 pr_err("dev[%p]: Passed queue_depth:" 1159 " %u exceeds TCM/SE_Device MAX" 1160 " TCQ: %u\n", dev, queue_depth, 1161 dev->se_sub_dev->se_dev_attrib.hw_queue_depth); 1162 return -EINVAL; 1163 } 1164 } 1165 } 1166 1167 dev->se_sub_dev->se_dev_attrib.queue_depth = dev->queue_depth = queue_depth; 1168 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", 1169 dev, queue_depth); 1170 return 0; 1171 } 1172 1173 int se_dev_set_max_sectors(struct se_device *dev, u32 max_sectors) 1174 { 1175 int force = 0; /* Force setting for VDEVS */ 1176 1177 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1178 pr_err("dev[%p]: Unable to change SE Device" 1179 " max_sectors while dev_export_obj: %d count exists\n", 1180 dev, atomic_read(&dev->dev_export_obj.obj_access_count)); 1181 return -EINVAL; 1182 } 1183 if (!max_sectors) { 1184 pr_err("dev[%p]: Illegal ZERO value for" 1185 " max_sectors\n", dev); 1186 return -EINVAL; 1187 } 1188 if (max_sectors < DA_STATUS_MAX_SECTORS_MIN) { 1189 pr_err("dev[%p]: Passed max_sectors: %u less than" 1190 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, max_sectors, 1191 DA_STATUS_MAX_SECTORS_MIN); 1192 return -EINVAL; 1193 } 1194 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1195 if (max_sectors > dev->se_sub_dev->se_dev_attrib.hw_max_sectors) { 1196 pr_err("dev[%p]: Passed max_sectors: %u" 1197 " greater than TCM/SE_Device max_sectors:" 1198 " %u\n", dev, max_sectors, 1199 dev->se_sub_dev->se_dev_attrib.hw_max_sectors); 1200 return -EINVAL; 1201 } 1202 } else { 1203 if (!force && (max_sectors > 1204 dev->se_sub_dev->se_dev_attrib.hw_max_sectors)) { 1205 pr_err("dev[%p]: Passed max_sectors: %u" 1206 " greater than TCM/SE_Device max_sectors" 1207 ": %u, use force=1 to override.\n", dev, 1208 max_sectors, dev->se_sub_dev->se_dev_attrib.hw_max_sectors); 1209 return -EINVAL; 1210 } 1211 if (max_sectors > DA_STATUS_MAX_SECTORS_MAX) { 1212 pr_err("dev[%p]: Passed max_sectors: %u" 1213 " greater than DA_STATUS_MAX_SECTORS_MAX:" 1214 " %u\n", dev, max_sectors, 1215 DA_STATUS_MAX_SECTORS_MAX); 1216 return -EINVAL; 1217 } 1218 } 1219 /* 1220 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks() 1221 */ 1222 max_sectors = se_dev_align_max_sectors(max_sectors, 1223 dev->se_sub_dev->se_dev_attrib.block_size); 1224 1225 dev->se_sub_dev->se_dev_attrib.max_sectors = max_sectors; 1226 pr_debug("dev[%p]: SE Device max_sectors changed to %u\n", 1227 dev, max_sectors); 1228 return 0; 1229 } 1230 1231 int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors) 1232 { 1233 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1234 pr_err("dev[%p]: Unable to change SE Device" 1235 " fabric_max_sectors while dev_export_obj: %d count exists\n", 1236 dev, atomic_read(&dev->dev_export_obj.obj_access_count)); 1237 return -EINVAL; 1238 } 1239 if (!fabric_max_sectors) { 1240 pr_err("dev[%p]: Illegal ZERO value for" 1241 " fabric_max_sectors\n", dev); 1242 return -EINVAL; 1243 } 1244 if (fabric_max_sectors < DA_STATUS_MAX_SECTORS_MIN) { 1245 pr_err("dev[%p]: Passed fabric_max_sectors: %u less than" 1246 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, fabric_max_sectors, 1247 DA_STATUS_MAX_SECTORS_MIN); 1248 return -EINVAL; 1249 } 1250 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1251 if (fabric_max_sectors > dev->se_sub_dev->se_dev_attrib.hw_max_sectors) { 1252 pr_err("dev[%p]: Passed fabric_max_sectors: %u" 1253 " greater than TCM/SE_Device max_sectors:" 1254 " %u\n", dev, fabric_max_sectors, 1255 dev->se_sub_dev->se_dev_attrib.hw_max_sectors); 1256 return -EINVAL; 1257 } 1258 } else { 1259 if (fabric_max_sectors > DA_STATUS_MAX_SECTORS_MAX) { 1260 pr_err("dev[%p]: Passed fabric_max_sectors: %u" 1261 " greater than DA_STATUS_MAX_SECTORS_MAX:" 1262 " %u\n", dev, fabric_max_sectors, 1263 DA_STATUS_MAX_SECTORS_MAX); 1264 return -EINVAL; 1265 } 1266 } 1267 /* 1268 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks() 1269 */ 1270 fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors, 1271 dev->se_sub_dev->se_dev_attrib.block_size); 1272 1273 dev->se_sub_dev->se_dev_attrib.fabric_max_sectors = fabric_max_sectors; 1274 pr_debug("dev[%p]: SE Device max_sectors changed to %u\n", 1275 dev, fabric_max_sectors); 1276 return 0; 1277 } 1278 1279 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors) 1280 { 1281 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1282 pr_err("dev[%p]: Unable to change SE Device" 1283 " optimal_sectors while dev_export_obj: %d count exists\n", 1284 dev, atomic_read(&dev->dev_export_obj.obj_access_count)); 1285 return -EINVAL; 1286 } 1287 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1288 pr_err("dev[%p]: Passed optimal_sectors cannot be" 1289 " changed for TCM/pSCSI\n", dev); 1290 return -EINVAL; 1291 } 1292 if (optimal_sectors > dev->se_sub_dev->se_dev_attrib.fabric_max_sectors) { 1293 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1294 " greater than fabric_max_sectors: %u\n", dev, 1295 optimal_sectors, dev->se_sub_dev->se_dev_attrib.fabric_max_sectors); 1296 return -EINVAL; 1297 } 1298 1299 dev->se_sub_dev->se_dev_attrib.optimal_sectors = optimal_sectors; 1300 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1301 dev, optimal_sectors); 1302 return 0; 1303 } 1304 1305 int se_dev_set_block_size(struct se_device *dev, u32 block_size) 1306 { 1307 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1308 pr_err("dev[%p]: Unable to change SE Device block_size" 1309 " while dev_export_obj: %d count exists\n", dev, 1310 atomic_read(&dev->dev_export_obj.obj_access_count)); 1311 return -EINVAL; 1312 } 1313 1314 if ((block_size != 512) && 1315 (block_size != 1024) && 1316 (block_size != 2048) && 1317 (block_size != 4096)) { 1318 pr_err("dev[%p]: Illegal value for block_device: %u" 1319 " for SE device, must be 512, 1024, 2048 or 4096\n", 1320 dev, block_size); 1321 return -EINVAL; 1322 } 1323 1324 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1325 pr_err("dev[%p]: Not allowed to change block_size for" 1326 " Physical Device, use for Linux/SCSI to change" 1327 " block_size for underlying hardware\n", dev); 1328 return -EINVAL; 1329 } 1330 1331 dev->se_sub_dev->se_dev_attrib.block_size = block_size; 1332 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1333 dev, block_size); 1334 return 0; 1335 } 1336 1337 struct se_lun *core_dev_add_lun( 1338 struct se_portal_group *tpg, 1339 struct se_hba *hba, 1340 struct se_device *dev, 1341 u32 lun) 1342 { 1343 struct se_lun *lun_p; 1344 u32 lun_access = 0; 1345 int rc; 1346 1347 if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) { 1348 pr_err("Unable to export struct se_device while dev_access_obj: %d\n", 1349 atomic_read(&dev->dev_access_obj.obj_access_count)); 1350 return ERR_PTR(-EACCES); 1351 } 1352 1353 lun_p = core_tpg_pre_addlun(tpg, lun); 1354 if (IS_ERR(lun_p)) 1355 return lun_p; 1356 1357 if (dev->dev_flags & DF_READ_ONLY) 1358 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; 1359 else 1360 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE; 1361 1362 rc = core_tpg_post_addlun(tpg, lun_p, lun_access, dev); 1363 if (rc < 0) 1364 return ERR_PTR(rc); 1365 1366 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from" 1367 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1368 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun_p->unpacked_lun, 1369 tpg->se_tpg_tfo->get_fabric_name(), hba->hba_id); 1370 /* 1371 * Update LUN maps for dynamically added initiators when 1372 * generate_node_acl is enabled. 1373 */ 1374 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) { 1375 struct se_node_acl *acl; 1376 spin_lock_irq(&tpg->acl_node_lock); 1377 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { 1378 if (acl->dynamic_node_acl && 1379 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only || 1380 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) { 1381 spin_unlock_irq(&tpg->acl_node_lock); 1382 core_tpg_add_node_to_devs(acl, tpg); 1383 spin_lock_irq(&tpg->acl_node_lock); 1384 } 1385 } 1386 spin_unlock_irq(&tpg->acl_node_lock); 1387 } 1388 1389 return lun_p; 1390 } 1391 1392 /* core_dev_del_lun(): 1393 * 1394 * 1395 */ 1396 int core_dev_del_lun( 1397 struct se_portal_group *tpg, 1398 u32 unpacked_lun) 1399 { 1400 struct se_lun *lun; 1401 1402 lun = core_tpg_pre_dellun(tpg, unpacked_lun); 1403 if (IS_ERR(lun)) 1404 return PTR_ERR(lun); 1405 1406 core_tpg_post_dellun(tpg, lun); 1407 1408 pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from" 1409 " device object\n", tpg->se_tpg_tfo->get_fabric_name(), 1410 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, 1411 tpg->se_tpg_tfo->get_fabric_name()); 1412 1413 return 0; 1414 } 1415 1416 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun) 1417 { 1418 struct se_lun *lun; 1419 1420 spin_lock(&tpg->tpg_lun_lock); 1421 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1422 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS" 1423 "_PER_TPG-1: %u for Target Portal Group: %hu\n", 1424 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1425 TRANSPORT_MAX_LUNS_PER_TPG-1, 1426 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1427 spin_unlock(&tpg->tpg_lun_lock); 1428 return NULL; 1429 } 1430 lun = tpg->tpg_lun_list[unpacked_lun]; 1431 1432 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) { 1433 pr_err("%s Logical Unit Number: %u is not free on" 1434 " Target Portal Group: %hu, ignoring request.\n", 1435 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1436 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1437 spin_unlock(&tpg->tpg_lun_lock); 1438 return NULL; 1439 } 1440 spin_unlock(&tpg->tpg_lun_lock); 1441 1442 return lun; 1443 } 1444 1445 /* core_dev_get_lun(): 1446 * 1447 * 1448 */ 1449 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun) 1450 { 1451 struct se_lun *lun; 1452 1453 spin_lock(&tpg->tpg_lun_lock); 1454 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1455 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER" 1456 "_TPG-1: %u for Target Portal Group: %hu\n", 1457 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1458 TRANSPORT_MAX_LUNS_PER_TPG-1, 1459 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1460 spin_unlock(&tpg->tpg_lun_lock); 1461 return NULL; 1462 } 1463 lun = tpg->tpg_lun_list[unpacked_lun]; 1464 1465 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { 1466 pr_err("%s Logical Unit Number: %u is not active on" 1467 " Target Portal Group: %hu, ignoring request.\n", 1468 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1469 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1470 spin_unlock(&tpg->tpg_lun_lock); 1471 return NULL; 1472 } 1473 spin_unlock(&tpg->tpg_lun_lock); 1474 1475 return lun; 1476 } 1477 1478 struct se_lun_acl *core_dev_init_initiator_node_lun_acl( 1479 struct se_portal_group *tpg, 1480 u32 mapped_lun, 1481 char *initiatorname, 1482 int *ret) 1483 { 1484 struct se_lun_acl *lacl; 1485 struct se_node_acl *nacl; 1486 1487 if (strlen(initiatorname) >= TRANSPORT_IQN_LEN) { 1488 pr_err("%s InitiatorName exceeds maximum size.\n", 1489 tpg->se_tpg_tfo->get_fabric_name()); 1490 *ret = -EOVERFLOW; 1491 return NULL; 1492 } 1493 nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname); 1494 if (!nacl) { 1495 *ret = -EINVAL; 1496 return NULL; 1497 } 1498 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL); 1499 if (!lacl) { 1500 pr_err("Unable to allocate memory for struct se_lun_acl.\n"); 1501 *ret = -ENOMEM; 1502 return NULL; 1503 } 1504 1505 INIT_LIST_HEAD(&lacl->lacl_list); 1506 lacl->mapped_lun = mapped_lun; 1507 lacl->se_lun_nacl = nacl; 1508 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); 1509 1510 return lacl; 1511 } 1512 1513 int core_dev_add_initiator_node_lun_acl( 1514 struct se_portal_group *tpg, 1515 struct se_lun_acl *lacl, 1516 u32 unpacked_lun, 1517 u32 lun_access) 1518 { 1519 struct se_lun *lun; 1520 struct se_node_acl *nacl; 1521 1522 lun = core_dev_get_lun(tpg, unpacked_lun); 1523 if (!lun) { 1524 pr_err("%s Logical Unit Number: %u is not active on" 1525 " Target Portal Group: %hu, ignoring request.\n", 1526 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1527 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1528 return -EINVAL; 1529 } 1530 1531 nacl = lacl->se_lun_nacl; 1532 if (!nacl) 1533 return -EINVAL; 1534 1535 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) && 1536 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE)) 1537 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; 1538 1539 lacl->se_lun = lun; 1540 1541 if (core_update_device_list_for_node(lun, lacl, lacl->mapped_lun, 1542 lun_access, nacl, tpg, 1) < 0) 1543 return -EINVAL; 1544 1545 spin_lock(&lun->lun_acl_lock); 1546 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list); 1547 atomic_inc(&lun->lun_acl_count); 1548 smp_mb__after_atomic_inc(); 1549 spin_unlock(&lun->lun_acl_lock); 1550 1551 pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for " 1552 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(), 1553 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun, 1554 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO", 1555 lacl->initiatorname); 1556 /* 1557 * Check to see if there are any existing persistent reservation APTPL 1558 * pre-registrations that need to be enabled for this LUN ACL.. 1559 */ 1560 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl); 1561 return 0; 1562 } 1563 1564 /* core_dev_del_initiator_node_lun_acl(): 1565 * 1566 * 1567 */ 1568 int core_dev_del_initiator_node_lun_acl( 1569 struct se_portal_group *tpg, 1570 struct se_lun *lun, 1571 struct se_lun_acl *lacl) 1572 { 1573 struct se_node_acl *nacl; 1574 1575 nacl = lacl->se_lun_nacl; 1576 if (!nacl) 1577 return -EINVAL; 1578 1579 spin_lock(&lun->lun_acl_lock); 1580 list_del(&lacl->lacl_list); 1581 atomic_dec(&lun->lun_acl_count); 1582 smp_mb__after_atomic_dec(); 1583 spin_unlock(&lun->lun_acl_lock); 1584 1585 core_update_device_list_for_node(lun, NULL, lacl->mapped_lun, 1586 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0); 1587 1588 lacl->se_lun = NULL; 1589 1590 pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for" 1591 " InitiatorNode: %s Mapped LUN: %u\n", 1592 tpg->se_tpg_tfo->get_fabric_name(), 1593 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, 1594 lacl->initiatorname, lacl->mapped_lun); 1595 1596 return 0; 1597 } 1598 1599 void core_dev_free_initiator_node_lun_acl( 1600 struct se_portal_group *tpg, 1601 struct se_lun_acl *lacl) 1602 { 1603 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s" 1604 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1605 tpg->se_tpg_tfo->tpg_get_tag(tpg), 1606 tpg->se_tpg_tfo->get_fabric_name(), 1607 lacl->initiatorname, lacl->mapped_lun); 1608 1609 kfree(lacl); 1610 } 1611 1612 int core_dev_setup_virtual_lun0(void) 1613 { 1614 struct se_hba *hba; 1615 struct se_device *dev; 1616 struct se_subsystem_dev *se_dev = NULL; 1617 struct se_subsystem_api *t; 1618 char buf[16]; 1619 int ret; 1620 1621 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE); 1622 if (IS_ERR(hba)) 1623 return PTR_ERR(hba); 1624 1625 lun0_hba = hba; 1626 t = hba->transport; 1627 1628 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL); 1629 if (!se_dev) { 1630 pr_err("Unable to allocate memory for" 1631 " struct se_subsystem_dev\n"); 1632 ret = -ENOMEM; 1633 goto out; 1634 } 1635 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list); 1636 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock); 1637 INIT_LIST_HEAD(&se_dev->t10_pr.registration_list); 1638 INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list); 1639 spin_lock_init(&se_dev->t10_pr.registration_lock); 1640 spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock); 1641 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list); 1642 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock); 1643 spin_lock_init(&se_dev->se_dev_lock); 1644 se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN; 1645 se_dev->t10_wwn.t10_sub_dev = se_dev; 1646 se_dev->t10_alua.t10_sub_dev = se_dev; 1647 se_dev->se_dev_attrib.da_sub_dev = se_dev; 1648 se_dev->se_dev_hba = hba; 1649 1650 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0"); 1651 if (!se_dev->se_dev_su_ptr) { 1652 pr_err("Unable to locate subsystem dependent pointer" 1653 " from allocate_virtdevice()\n"); 1654 ret = -ENOMEM; 1655 goto out; 1656 } 1657 lun0_su_dev = se_dev; 1658 1659 memset(buf, 0, 16); 1660 sprintf(buf, "rd_pages=8"); 1661 t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf)); 1662 1663 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr); 1664 if (IS_ERR(dev)) { 1665 ret = PTR_ERR(dev); 1666 goto out; 1667 } 1668 se_dev->se_dev_ptr = dev; 1669 g_lun0_dev = dev; 1670 1671 return 0; 1672 out: 1673 lun0_su_dev = NULL; 1674 kfree(se_dev); 1675 if (lun0_hba) { 1676 core_delete_hba(lun0_hba); 1677 lun0_hba = NULL; 1678 } 1679 return ret; 1680 } 1681 1682 1683 void core_dev_release_virtual_lun0(void) 1684 { 1685 struct se_hba *hba = lun0_hba; 1686 struct se_subsystem_dev *su_dev = lun0_su_dev; 1687 1688 if (!hba) 1689 return; 1690 1691 if (g_lun0_dev) 1692 se_free_virtual_device(g_lun0_dev, hba); 1693 1694 kfree(su_dev); 1695 core_delete_hba(hba); 1696 } 1697