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 <net/sock.h> 39 #include <net/tcp.h> 40 #include <scsi/scsi.h> 41 #include <scsi/scsi_device.h> 42 43 #include <target/target_core_base.h> 44 #include <target/target_core_device.h> 45 #include <target/target_core_tpg.h> 46 #include <target/target_core_transport.h> 47 #include <target/target_core_fabric_ops.h> 48 49 #include "target_core_alua.h" 50 #include "target_core_hba.h" 51 #include "target_core_pr.h" 52 #include "target_core_ua.h" 53 54 static void se_dev_start(struct se_device *dev); 55 static void se_dev_stop(struct se_device *dev); 56 57 static struct se_hba *lun0_hba; 58 static struct se_subsystem_dev *lun0_su_dev; 59 /* not static, needed by tpg.c */ 60 struct se_device *g_lun0_dev; 61 62 int transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun) 63 { 64 struct se_lun *se_lun = NULL; 65 struct se_session *se_sess = se_cmd->se_sess; 66 struct se_device *dev; 67 unsigned long flags; 68 69 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) { 70 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN; 71 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 72 return -ENODEV; 73 } 74 75 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags); 76 se_cmd->se_deve = &se_sess->se_node_acl->device_list[unpacked_lun]; 77 if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 78 struct se_dev_entry *deve = se_cmd->se_deve; 79 80 deve->total_cmds++; 81 deve->total_bytes += se_cmd->data_length; 82 83 if ((se_cmd->data_direction == DMA_TO_DEVICE) && 84 (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) { 85 se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED; 86 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 87 pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN" 88 " Access for 0x%08x\n", 89 se_cmd->se_tfo->get_fabric_name(), 90 unpacked_lun); 91 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); 92 return -EACCES; 93 } 94 95 if (se_cmd->data_direction == DMA_TO_DEVICE) 96 deve->write_bytes += se_cmd->data_length; 97 else if (se_cmd->data_direction == DMA_FROM_DEVICE) 98 deve->read_bytes += se_cmd->data_length; 99 100 deve->deve_cmds++; 101 102 se_lun = deve->se_lun; 103 se_cmd->se_lun = deve->se_lun; 104 se_cmd->pr_res_key = deve->pr_res_key; 105 se_cmd->orig_fe_lun = unpacked_lun; 106 se_cmd->se_orig_obj_ptr = se_cmd->se_lun->lun_se_dev; 107 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; 108 } 109 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); 110 111 if (!se_lun) { 112 /* 113 * Use the se_portal_group->tpg_virt_lun0 to allow for 114 * REPORT_LUNS, et al to be returned when no active 115 * MappedLUN=0 exists for this Initiator Port. 116 */ 117 if (unpacked_lun != 0) { 118 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN; 119 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 120 pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" 121 " Access for 0x%08x\n", 122 se_cmd->se_tfo->get_fabric_name(), 123 unpacked_lun); 124 return -ENODEV; 125 } 126 /* 127 * Force WRITE PROTECT for virtual LUN 0 128 */ 129 if ((se_cmd->data_direction != DMA_FROM_DEVICE) && 130 (se_cmd->data_direction != DMA_NONE)) { 131 se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED; 132 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 133 return -EACCES; 134 } 135 136 se_lun = &se_sess->se_tpg->tpg_virt_lun0; 137 se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0; 138 se_cmd->orig_fe_lun = 0; 139 se_cmd->se_orig_obj_ptr = se_cmd->se_lun->lun_se_dev; 140 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; 141 } 142 /* 143 * Determine if the struct se_lun is online. 144 * FIXME: Check for LUN_RESET + UNIT Attention 145 */ 146 if (se_dev_check_online(se_lun->lun_se_dev) != 0) { 147 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN; 148 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 149 return -ENODEV; 150 } 151 152 /* Directly associate cmd with se_dev */ 153 se_cmd->se_dev = se_lun->lun_se_dev; 154 155 /* TODO: get rid of this and use atomics for stats */ 156 dev = se_lun->lun_se_dev; 157 spin_lock_irqsave(&dev->stats_lock, flags); 158 dev->num_cmds++; 159 if (se_cmd->data_direction == DMA_TO_DEVICE) 160 dev->write_bytes += se_cmd->data_length; 161 else if (se_cmd->data_direction == DMA_FROM_DEVICE) 162 dev->read_bytes += se_cmd->data_length; 163 spin_unlock_irqrestore(&dev->stats_lock, flags); 164 165 /* 166 * Add the iscsi_cmd_t to the struct se_lun's cmd list. This list is used 167 * for tracking state of struct se_cmds during LUN shutdown events. 168 */ 169 spin_lock_irqsave(&se_lun->lun_cmd_lock, flags); 170 list_add_tail(&se_cmd->se_lun_node, &se_lun->lun_cmd_list); 171 atomic_set(&se_cmd->transport_lun_active, 1); 172 spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags); 173 174 return 0; 175 } 176 EXPORT_SYMBOL(transport_lookup_cmd_lun); 177 178 int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun) 179 { 180 struct se_dev_entry *deve; 181 struct se_lun *se_lun = NULL; 182 struct se_session *se_sess = se_cmd->se_sess; 183 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req; 184 unsigned long flags; 185 186 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) { 187 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN; 188 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 189 return -ENODEV; 190 } 191 192 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags); 193 se_cmd->se_deve = &se_sess->se_node_acl->device_list[unpacked_lun]; 194 deve = se_cmd->se_deve; 195 196 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 197 se_tmr->tmr_lun = deve->se_lun; 198 se_cmd->se_lun = deve->se_lun; 199 se_lun = deve->se_lun; 200 se_cmd->pr_res_key = deve->pr_res_key; 201 se_cmd->orig_fe_lun = unpacked_lun; 202 se_cmd->se_orig_obj_ptr = se_cmd->se_dev; 203 } 204 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); 205 206 if (!se_lun) { 207 pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" 208 " Access for 0x%08x\n", 209 se_cmd->se_tfo->get_fabric_name(), 210 unpacked_lun); 211 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 212 return -ENODEV; 213 } 214 /* 215 * Determine if the struct se_lun is online. 216 * FIXME: Check for LUN_RESET + UNIT Attention 217 */ 218 if (se_dev_check_online(se_lun->lun_se_dev) != 0) { 219 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 220 return -ENODEV; 221 } 222 223 /* Directly associate cmd with se_dev */ 224 se_cmd->se_dev = se_lun->lun_se_dev; 225 se_tmr->tmr_dev = se_lun->lun_se_dev; 226 227 spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags); 228 list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list); 229 spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags); 230 231 return 0; 232 } 233 EXPORT_SYMBOL(transport_lookup_tmr_lun); 234 235 /* 236 * This function is called from core_scsi3_emulate_pro_register_and_move() 237 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count 238 * when a matching rtpi is found. 239 */ 240 struct se_dev_entry *core_get_se_deve_from_rtpi( 241 struct se_node_acl *nacl, 242 u16 rtpi) 243 { 244 struct se_dev_entry *deve; 245 struct se_lun *lun; 246 struct se_port *port; 247 struct se_portal_group *tpg = nacl->se_tpg; 248 u32 i; 249 250 spin_lock_irq(&nacl->device_list_lock); 251 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 252 deve = &nacl->device_list[i]; 253 254 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 255 continue; 256 257 lun = deve->se_lun; 258 if (!lun) { 259 pr_err("%s device entries device pointer is" 260 " NULL, but Initiator has access.\n", 261 tpg->se_tpg_tfo->get_fabric_name()); 262 continue; 263 } 264 port = lun->lun_sep; 265 if (!port) { 266 pr_err("%s device entries device pointer is" 267 " NULL, but Initiator has access.\n", 268 tpg->se_tpg_tfo->get_fabric_name()); 269 continue; 270 } 271 if (port->sep_rtpi != rtpi) 272 continue; 273 274 atomic_inc(&deve->pr_ref_count); 275 smp_mb__after_atomic_inc(); 276 spin_unlock_irq(&nacl->device_list_lock); 277 278 return deve; 279 } 280 spin_unlock_irq(&nacl->device_list_lock); 281 282 return NULL; 283 } 284 285 int core_free_device_list_for_node( 286 struct se_node_acl *nacl, 287 struct se_portal_group *tpg) 288 { 289 struct se_dev_entry *deve; 290 struct se_lun *lun; 291 u32 i; 292 293 if (!nacl->device_list) 294 return 0; 295 296 spin_lock_irq(&nacl->device_list_lock); 297 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 298 deve = &nacl->device_list[i]; 299 300 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 301 continue; 302 303 if (!deve->se_lun) { 304 pr_err("%s device entries device pointer is" 305 " NULL, but Initiator has access.\n", 306 tpg->se_tpg_tfo->get_fabric_name()); 307 continue; 308 } 309 lun = deve->se_lun; 310 311 spin_unlock_irq(&nacl->device_list_lock); 312 core_update_device_list_for_node(lun, NULL, deve->mapped_lun, 313 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0); 314 spin_lock_irq(&nacl->device_list_lock); 315 } 316 spin_unlock_irq(&nacl->device_list_lock); 317 318 kfree(nacl->device_list); 319 nacl->device_list = NULL; 320 321 return 0; 322 } 323 324 void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd) 325 { 326 struct se_dev_entry *deve; 327 328 spin_lock_irq(&se_nacl->device_list_lock); 329 deve = &se_nacl->device_list[se_cmd->orig_fe_lun]; 330 deve->deve_cmds--; 331 spin_unlock_irq(&se_nacl->device_list_lock); 332 } 333 334 void core_update_device_list_access( 335 u32 mapped_lun, 336 u32 lun_access, 337 struct se_node_acl *nacl) 338 { 339 struct se_dev_entry *deve; 340 341 spin_lock_irq(&nacl->device_list_lock); 342 deve = &nacl->device_list[mapped_lun]; 343 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 344 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 345 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 346 } else { 347 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 348 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 349 } 350 spin_unlock_irq(&nacl->device_list_lock); 351 } 352 353 /* core_update_device_list_for_node(): 354 * 355 * 356 */ 357 int core_update_device_list_for_node( 358 struct se_lun *lun, 359 struct se_lun_acl *lun_acl, 360 u32 mapped_lun, 361 u32 lun_access, 362 struct se_node_acl *nacl, 363 struct se_portal_group *tpg, 364 int enable) 365 { 366 struct se_port *port = lun->lun_sep; 367 struct se_dev_entry *deve = &nacl->device_list[mapped_lun]; 368 int trans = 0; 369 /* 370 * If the MappedLUN entry is being disabled, the entry in 371 * port->sep_alua_list must be removed now before clearing the 372 * struct se_dev_entry pointers below as logic in 373 * core_alua_do_transition_tg_pt() depends on these being present. 374 */ 375 if (!enable) { 376 /* 377 * deve->se_lun_acl will be NULL for demo-mode created LUNs 378 * that have not been explicitly concerted to MappedLUNs -> 379 * struct se_lun_acl, but we remove deve->alua_port_list from 380 * port->sep_alua_list. This also means that active UAs and 381 * NodeACL context specific PR metadata for demo-mode 382 * MappedLUN *deve will be released below.. 383 */ 384 spin_lock_bh(&port->sep_alua_lock); 385 list_del(&deve->alua_port_list); 386 spin_unlock_bh(&port->sep_alua_lock); 387 } 388 389 spin_lock_irq(&nacl->device_list_lock); 390 if (enable) { 391 /* 392 * Check if the call is handling demo mode -> explict LUN ACL 393 * transition. This transition must be for the same struct se_lun 394 * + mapped_lun that was setup in demo mode.. 395 */ 396 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 397 if (deve->se_lun_acl != NULL) { 398 pr_err("struct se_dev_entry->se_lun_acl" 399 " already set for demo mode -> explict" 400 " LUN ACL transition\n"); 401 spin_unlock_irq(&nacl->device_list_lock); 402 return -EINVAL; 403 } 404 if (deve->se_lun != lun) { 405 pr_err("struct se_dev_entry->se_lun does" 406 " match passed struct se_lun for demo mode" 407 " -> explict LUN ACL transition\n"); 408 spin_unlock_irq(&nacl->device_list_lock); 409 return -EINVAL; 410 } 411 deve->se_lun_acl = lun_acl; 412 trans = 1; 413 } else { 414 deve->se_lun = lun; 415 deve->se_lun_acl = lun_acl; 416 deve->mapped_lun = mapped_lun; 417 deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS; 418 } 419 420 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 421 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 422 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 423 } else { 424 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 425 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 426 } 427 428 if (trans) { 429 spin_unlock_irq(&nacl->device_list_lock); 430 return 0; 431 } 432 deve->creation_time = get_jiffies_64(); 433 deve->attach_count++; 434 spin_unlock_irq(&nacl->device_list_lock); 435 436 spin_lock_bh(&port->sep_alua_lock); 437 list_add_tail(&deve->alua_port_list, &port->sep_alua_list); 438 spin_unlock_bh(&port->sep_alua_lock); 439 440 return 0; 441 } 442 /* 443 * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE 444 * PR operation to complete. 445 */ 446 spin_unlock_irq(&nacl->device_list_lock); 447 while (atomic_read(&deve->pr_ref_count) != 0) 448 cpu_relax(); 449 spin_lock_irq(&nacl->device_list_lock); 450 /* 451 * Disable struct se_dev_entry LUN ACL mapping 452 */ 453 core_scsi3_ua_release_all(deve); 454 deve->se_lun = NULL; 455 deve->se_lun_acl = NULL; 456 deve->lun_flags = 0; 457 deve->creation_time = 0; 458 deve->attach_count--; 459 spin_unlock_irq(&nacl->device_list_lock); 460 461 core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl); 462 return 0; 463 } 464 465 /* core_clear_lun_from_tpg(): 466 * 467 * 468 */ 469 void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg) 470 { 471 struct se_node_acl *nacl; 472 struct se_dev_entry *deve; 473 u32 i; 474 475 spin_lock_irq(&tpg->acl_node_lock); 476 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) { 477 spin_unlock_irq(&tpg->acl_node_lock); 478 479 spin_lock_irq(&nacl->device_list_lock); 480 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 481 deve = &nacl->device_list[i]; 482 if (lun != deve->se_lun) 483 continue; 484 spin_unlock_irq(&nacl->device_list_lock); 485 486 core_update_device_list_for_node(lun, NULL, 487 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS, 488 nacl, tpg, 0); 489 490 spin_lock_irq(&nacl->device_list_lock); 491 } 492 spin_unlock_irq(&nacl->device_list_lock); 493 494 spin_lock_irq(&tpg->acl_node_lock); 495 } 496 spin_unlock_irq(&tpg->acl_node_lock); 497 } 498 499 static struct se_port *core_alloc_port(struct se_device *dev) 500 { 501 struct se_port *port, *port_tmp; 502 503 port = kzalloc(sizeof(struct se_port), GFP_KERNEL); 504 if (!port) { 505 pr_err("Unable to allocate struct se_port\n"); 506 return ERR_PTR(-ENOMEM); 507 } 508 INIT_LIST_HEAD(&port->sep_alua_list); 509 INIT_LIST_HEAD(&port->sep_list); 510 atomic_set(&port->sep_tg_pt_secondary_offline, 0); 511 spin_lock_init(&port->sep_alua_lock); 512 mutex_init(&port->sep_tg_pt_md_mutex); 513 514 spin_lock(&dev->se_port_lock); 515 if (dev->dev_port_count == 0x0000ffff) { 516 pr_warn("Reached dev->dev_port_count ==" 517 " 0x0000ffff\n"); 518 spin_unlock(&dev->se_port_lock); 519 return ERR_PTR(-ENOSPC); 520 } 521 again: 522 /* 523 * Allocate the next RELATIVE TARGET PORT IDENTIFER for this struct se_device 524 * Here is the table from spc4r17 section 7.7.3.8. 525 * 526 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field 527 * 528 * Code Description 529 * 0h Reserved 530 * 1h Relative port 1, historically known as port A 531 * 2h Relative port 2, historically known as port B 532 * 3h to FFFFh Relative port 3 through 65 535 533 */ 534 port->sep_rtpi = dev->dev_rpti_counter++; 535 if (!port->sep_rtpi) 536 goto again; 537 538 list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) { 539 /* 540 * Make sure RELATIVE TARGET PORT IDENTIFER is unique 541 * for 16-bit wrap.. 542 */ 543 if (port->sep_rtpi == port_tmp->sep_rtpi) 544 goto again; 545 } 546 spin_unlock(&dev->se_port_lock); 547 548 return port; 549 } 550 551 static void core_export_port( 552 struct se_device *dev, 553 struct se_portal_group *tpg, 554 struct se_port *port, 555 struct se_lun *lun) 556 { 557 struct se_subsystem_dev *su_dev = dev->se_sub_dev; 558 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL; 559 560 spin_lock(&dev->se_port_lock); 561 spin_lock(&lun->lun_sep_lock); 562 port->sep_tpg = tpg; 563 port->sep_lun = lun; 564 lun->lun_sep = port; 565 spin_unlock(&lun->lun_sep_lock); 566 567 list_add_tail(&port->sep_list, &dev->dev_sep_list); 568 spin_unlock(&dev->se_port_lock); 569 570 if (su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) { 571 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port); 572 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) { 573 pr_err("Unable to allocate t10_alua_tg_pt" 574 "_gp_member_t\n"); 575 return; 576 } 577 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 578 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem, 579 su_dev->t10_alua.default_tg_pt_gp); 580 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 581 pr_debug("%s/%s: Adding to default ALUA Target Port" 582 " Group: alua/default_tg_pt_gp\n", 583 dev->transport->name, tpg->se_tpg_tfo->get_fabric_name()); 584 } 585 586 dev->dev_port_count++; 587 port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFER */ 588 } 589 590 /* 591 * Called with struct se_device->se_port_lock spinlock held. 592 */ 593 static void core_release_port(struct se_device *dev, struct se_port *port) 594 __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock) 595 { 596 /* 597 * Wait for any port reference for PR ALL_TG_PT=1 operation 598 * to complete in __core_scsi3_alloc_registration() 599 */ 600 spin_unlock(&dev->se_port_lock); 601 if (atomic_read(&port->sep_tg_pt_ref_cnt)) 602 cpu_relax(); 603 spin_lock(&dev->se_port_lock); 604 605 core_alua_free_tg_pt_gp_mem(port); 606 607 list_del(&port->sep_list); 608 dev->dev_port_count--; 609 kfree(port); 610 } 611 612 int core_dev_export( 613 struct se_device *dev, 614 struct se_portal_group *tpg, 615 struct se_lun *lun) 616 { 617 struct se_port *port; 618 619 port = core_alloc_port(dev); 620 if (IS_ERR(port)) 621 return PTR_ERR(port); 622 623 lun->lun_se_dev = dev; 624 se_dev_start(dev); 625 626 atomic_inc(&dev->dev_export_obj.obj_access_count); 627 core_export_port(dev, tpg, port, lun); 628 return 0; 629 } 630 631 void core_dev_unexport( 632 struct se_device *dev, 633 struct se_portal_group *tpg, 634 struct se_lun *lun) 635 { 636 struct se_port *port = lun->lun_sep; 637 638 spin_lock(&lun->lun_sep_lock); 639 if (lun->lun_se_dev == NULL) { 640 spin_unlock(&lun->lun_sep_lock); 641 return; 642 } 643 spin_unlock(&lun->lun_sep_lock); 644 645 spin_lock(&dev->se_port_lock); 646 atomic_dec(&dev->dev_export_obj.obj_access_count); 647 core_release_port(dev, port); 648 spin_unlock(&dev->se_port_lock); 649 650 se_dev_stop(dev); 651 lun->lun_se_dev = NULL; 652 } 653 654 int transport_core_report_lun_response(struct se_cmd *se_cmd) 655 { 656 struct se_dev_entry *deve; 657 struct se_lun *se_lun; 658 struct se_session *se_sess = se_cmd->se_sess; 659 struct se_task *se_task; 660 unsigned char *buf; 661 u32 cdb_offset = 0, lun_count = 0, offset = 8, i; 662 663 list_for_each_entry(se_task, &se_cmd->t_task_list, t_list) 664 break; 665 666 if (!se_task) { 667 pr_err("Unable to locate struct se_task for struct se_cmd\n"); 668 return PYX_TRANSPORT_LU_COMM_FAILURE; 669 } 670 671 buf = transport_kmap_first_data_page(se_cmd); 672 673 /* 674 * If no struct se_session pointer is present, this struct se_cmd is 675 * coming via a target_core_mod PASSTHROUGH op, and not through 676 * a $FABRIC_MOD. In that case, report LUN=0 only. 677 */ 678 if (!se_sess) { 679 int_to_scsilun(0, (struct scsi_lun *)&buf[offset]); 680 lun_count = 1; 681 goto done; 682 } 683 684 spin_lock_irq(&se_sess->se_node_acl->device_list_lock); 685 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 686 deve = &se_sess->se_node_acl->device_list[i]; 687 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 688 continue; 689 se_lun = deve->se_lun; 690 /* 691 * We determine the correct LUN LIST LENGTH even once we 692 * have reached the initial allocation length. 693 * See SPC2-R20 7.19. 694 */ 695 lun_count++; 696 if ((cdb_offset + 8) >= se_cmd->data_length) 697 continue; 698 699 int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]); 700 offset += 8; 701 cdb_offset += 8; 702 } 703 spin_unlock_irq(&se_sess->se_node_acl->device_list_lock); 704 705 /* 706 * See SPC3 r07, page 159. 707 */ 708 done: 709 transport_kunmap_first_data_page(se_cmd); 710 lun_count *= 8; 711 buf[0] = ((lun_count >> 24) & 0xff); 712 buf[1] = ((lun_count >> 16) & 0xff); 713 buf[2] = ((lun_count >> 8) & 0xff); 714 buf[3] = (lun_count & 0xff); 715 716 return PYX_TRANSPORT_SENT_TO_TRANSPORT; 717 } 718 719 /* se_release_device_for_hba(): 720 * 721 * 722 */ 723 void se_release_device_for_hba(struct se_device *dev) 724 { 725 struct se_hba *hba = dev->se_hba; 726 727 if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) || 728 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) || 729 (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) || 730 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) || 731 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED)) 732 se_dev_stop(dev); 733 734 if (dev->dev_ptr) { 735 kthread_stop(dev->process_thread); 736 if (dev->transport->free_device) 737 dev->transport->free_device(dev->dev_ptr); 738 } 739 740 spin_lock(&hba->device_lock); 741 list_del(&dev->dev_list); 742 hba->dev_count--; 743 spin_unlock(&hba->device_lock); 744 745 core_scsi3_free_all_registrations(dev); 746 se_release_vpd_for_dev(dev); 747 748 kfree(dev); 749 } 750 751 void se_release_vpd_for_dev(struct se_device *dev) 752 { 753 struct t10_vpd *vpd, *vpd_tmp; 754 755 spin_lock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock); 756 list_for_each_entry_safe(vpd, vpd_tmp, 757 &dev->se_sub_dev->t10_wwn.t10_vpd_list, vpd_list) { 758 list_del(&vpd->vpd_list); 759 kfree(vpd); 760 } 761 spin_unlock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock); 762 } 763 764 /* se_free_virtual_device(): 765 * 766 * Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers. 767 */ 768 int se_free_virtual_device(struct se_device *dev, struct se_hba *hba) 769 { 770 if (!list_empty(&dev->dev_sep_list)) 771 dump_stack(); 772 773 core_alua_free_lu_gp_mem(dev); 774 se_release_device_for_hba(dev); 775 776 return 0; 777 } 778 779 static void se_dev_start(struct se_device *dev) 780 { 781 struct se_hba *hba = dev->se_hba; 782 783 spin_lock(&hba->device_lock); 784 atomic_inc(&dev->dev_obj.obj_access_count); 785 if (atomic_read(&dev->dev_obj.obj_access_count) == 1) { 786 if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) { 787 dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED; 788 dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED; 789 } else if (dev->dev_status & 790 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) { 791 dev->dev_status &= 792 ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED; 793 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED; 794 } 795 } 796 spin_unlock(&hba->device_lock); 797 } 798 799 static void se_dev_stop(struct se_device *dev) 800 { 801 struct se_hba *hba = dev->se_hba; 802 803 spin_lock(&hba->device_lock); 804 atomic_dec(&dev->dev_obj.obj_access_count); 805 if (atomic_read(&dev->dev_obj.obj_access_count) == 0) { 806 if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) { 807 dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED; 808 dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED; 809 } else if (dev->dev_status & 810 TRANSPORT_DEVICE_OFFLINE_ACTIVATED) { 811 dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED; 812 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED; 813 } 814 } 815 spin_unlock(&hba->device_lock); 816 } 817 818 int se_dev_check_online(struct se_device *dev) 819 { 820 unsigned long flags; 821 int ret; 822 823 spin_lock_irqsave(&dev->dev_status_lock, flags); 824 ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) || 825 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1; 826 spin_unlock_irqrestore(&dev->dev_status_lock, flags); 827 828 return ret; 829 } 830 831 int se_dev_check_shutdown(struct se_device *dev) 832 { 833 int ret; 834 835 spin_lock_irq(&dev->dev_status_lock); 836 ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN); 837 spin_unlock_irq(&dev->dev_status_lock); 838 839 return ret; 840 } 841 842 u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size) 843 { 844 u32 tmp, aligned_max_sectors; 845 /* 846 * Limit max_sectors to a PAGE_SIZE aligned value for modern 847 * transport_allocate_data_tasks() operation. 848 */ 849 tmp = rounddown((max_sectors * block_size), PAGE_SIZE); 850 aligned_max_sectors = (tmp / block_size); 851 if (max_sectors != aligned_max_sectors) { 852 printk(KERN_INFO "Rounding down aligned max_sectors from %u" 853 " to %u\n", max_sectors, aligned_max_sectors); 854 return aligned_max_sectors; 855 } 856 857 return max_sectors; 858 } 859 860 void se_dev_set_default_attribs( 861 struct se_device *dev, 862 struct se_dev_limits *dev_limits) 863 { 864 struct queue_limits *limits = &dev_limits->limits; 865 866 dev->se_sub_dev->se_dev_attrib.emulate_dpo = DA_EMULATE_DPO; 867 dev->se_sub_dev->se_dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE; 868 dev->se_sub_dev->se_dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ; 869 dev->se_sub_dev->se_dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE; 870 dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL; 871 dev->se_sub_dev->se_dev_attrib.emulate_tas = DA_EMULATE_TAS; 872 dev->se_sub_dev->se_dev_attrib.emulate_tpu = DA_EMULATE_TPU; 873 dev->se_sub_dev->se_dev_attrib.emulate_tpws = DA_EMULATE_TPWS; 874 dev->se_sub_dev->se_dev_attrib.emulate_reservations = DA_EMULATE_RESERVATIONS; 875 dev->se_sub_dev->se_dev_attrib.emulate_alua = DA_EMULATE_ALUA; 876 dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS; 877 dev->se_sub_dev->se_dev_attrib.is_nonrot = DA_IS_NONROT; 878 dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD; 879 /* 880 * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK 881 * iblock_create_virtdevice() from struct queue_limits values 882 * if blk_queue_discard()==1 883 */ 884 dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT; 885 dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count = 886 DA_MAX_UNMAP_BLOCK_DESC_COUNT; 887 dev->se_sub_dev->se_dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT; 888 dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment = 889 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT; 890 /* 891 * block_size is based on subsystem plugin dependent requirements. 892 */ 893 dev->se_sub_dev->se_dev_attrib.hw_block_size = limits->logical_block_size; 894 dev->se_sub_dev->se_dev_attrib.block_size = limits->logical_block_size; 895 /* 896 * max_sectors is based on subsystem plugin dependent requirements. 897 */ 898 dev->se_sub_dev->se_dev_attrib.hw_max_sectors = limits->max_hw_sectors; 899 /* 900 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks() 901 */ 902 limits->max_sectors = se_dev_align_max_sectors(limits->max_sectors, 903 limits->logical_block_size); 904 dev->se_sub_dev->se_dev_attrib.max_sectors = limits->max_sectors; 905 /* 906 * Set optimal_sectors from max_sectors, which can be lowered via 907 * configfs. 908 */ 909 dev->se_sub_dev->se_dev_attrib.optimal_sectors = limits->max_sectors; 910 /* 911 * queue_depth is based on subsystem plugin dependent requirements. 912 */ 913 dev->se_sub_dev->se_dev_attrib.hw_queue_depth = dev_limits->hw_queue_depth; 914 dev->se_sub_dev->se_dev_attrib.queue_depth = dev_limits->queue_depth; 915 } 916 917 int se_dev_set_task_timeout(struct se_device *dev, u32 task_timeout) 918 { 919 if (task_timeout > DA_TASK_TIMEOUT_MAX) { 920 pr_err("dev[%p]: Passed task_timeout: %u larger then" 921 " DA_TASK_TIMEOUT_MAX\n", dev, task_timeout); 922 return -EINVAL; 923 } else { 924 dev->se_sub_dev->se_dev_attrib.task_timeout = task_timeout; 925 pr_debug("dev[%p]: Set SE Device task_timeout: %u\n", 926 dev, task_timeout); 927 } 928 929 return 0; 930 } 931 932 int se_dev_set_max_unmap_lba_count( 933 struct se_device *dev, 934 u32 max_unmap_lba_count) 935 { 936 dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = max_unmap_lba_count; 937 pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n", 938 dev, dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count); 939 return 0; 940 } 941 942 int se_dev_set_max_unmap_block_desc_count( 943 struct se_device *dev, 944 u32 max_unmap_block_desc_count) 945 { 946 dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count = 947 max_unmap_block_desc_count; 948 pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n", 949 dev, dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count); 950 return 0; 951 } 952 953 int se_dev_set_unmap_granularity( 954 struct se_device *dev, 955 u32 unmap_granularity) 956 { 957 dev->se_sub_dev->se_dev_attrib.unmap_granularity = unmap_granularity; 958 pr_debug("dev[%p]: Set unmap_granularity: %u\n", 959 dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity); 960 return 0; 961 } 962 963 int se_dev_set_unmap_granularity_alignment( 964 struct se_device *dev, 965 u32 unmap_granularity_alignment) 966 { 967 dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment; 968 pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n", 969 dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment); 970 return 0; 971 } 972 973 int se_dev_set_emulate_dpo(struct se_device *dev, int flag) 974 { 975 if ((flag != 0) && (flag != 1)) { 976 pr_err("Illegal value %d\n", flag); 977 return -EINVAL; 978 } 979 if (dev->transport->dpo_emulated == NULL) { 980 pr_err("dev->transport->dpo_emulated is NULL\n"); 981 return -EINVAL; 982 } 983 if (dev->transport->dpo_emulated(dev) == 0) { 984 pr_err("dev->transport->dpo_emulated not supported\n"); 985 return -EINVAL; 986 } 987 dev->se_sub_dev->se_dev_attrib.emulate_dpo = flag; 988 pr_debug("dev[%p]: SE Device Page Out (DPO) Emulation" 989 " bit: %d\n", dev, dev->se_sub_dev->se_dev_attrib.emulate_dpo); 990 return 0; 991 } 992 993 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag) 994 { 995 if ((flag != 0) && (flag != 1)) { 996 pr_err("Illegal value %d\n", flag); 997 return -EINVAL; 998 } 999 if (dev->transport->fua_write_emulated == NULL) { 1000 pr_err("dev->transport->fua_write_emulated is NULL\n"); 1001 return -EINVAL; 1002 } 1003 if (dev->transport->fua_write_emulated(dev) == 0) { 1004 pr_err("dev->transport->fua_write_emulated not supported\n"); 1005 return -EINVAL; 1006 } 1007 dev->se_sub_dev->se_dev_attrib.emulate_fua_write = flag; 1008 pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n", 1009 dev, dev->se_sub_dev->se_dev_attrib.emulate_fua_write); 1010 return 0; 1011 } 1012 1013 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag) 1014 { 1015 if ((flag != 0) && (flag != 1)) { 1016 pr_err("Illegal value %d\n", flag); 1017 return -EINVAL; 1018 } 1019 if (dev->transport->fua_read_emulated == NULL) { 1020 pr_err("dev->transport->fua_read_emulated is NULL\n"); 1021 return -EINVAL; 1022 } 1023 if (dev->transport->fua_read_emulated(dev) == 0) { 1024 pr_err("dev->transport->fua_read_emulated not supported\n"); 1025 return -EINVAL; 1026 } 1027 dev->se_sub_dev->se_dev_attrib.emulate_fua_read = flag; 1028 pr_debug("dev[%p]: SE Device Forced Unit Access READs: %d\n", 1029 dev, dev->se_sub_dev->se_dev_attrib.emulate_fua_read); 1030 return 0; 1031 } 1032 1033 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag) 1034 { 1035 if ((flag != 0) && (flag != 1)) { 1036 pr_err("Illegal value %d\n", flag); 1037 return -EINVAL; 1038 } 1039 if (dev->transport->write_cache_emulated == NULL) { 1040 pr_err("dev->transport->write_cache_emulated is NULL\n"); 1041 return -EINVAL; 1042 } 1043 if (dev->transport->write_cache_emulated(dev) == 0) { 1044 pr_err("dev->transport->write_cache_emulated not supported\n"); 1045 return -EINVAL; 1046 } 1047 dev->se_sub_dev->se_dev_attrib.emulate_write_cache = flag; 1048 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 1049 dev, dev->se_sub_dev->se_dev_attrib.emulate_write_cache); 1050 return 0; 1051 } 1052 1053 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag) 1054 { 1055 if ((flag != 0) && (flag != 1) && (flag != 2)) { 1056 pr_err("Illegal value %d\n", flag); 1057 return -EINVAL; 1058 } 1059 1060 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1061 pr_err("dev[%p]: Unable to change SE Device" 1062 " UA_INTRLCK_CTRL while dev_export_obj: %d count" 1063 " exists\n", dev, 1064 atomic_read(&dev->dev_export_obj.obj_access_count)); 1065 return -EINVAL; 1066 } 1067 dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = flag; 1068 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 1069 dev, dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl); 1070 1071 return 0; 1072 } 1073 1074 int se_dev_set_emulate_tas(struct se_device *dev, int flag) 1075 { 1076 if ((flag != 0) && (flag != 1)) { 1077 pr_err("Illegal value %d\n", flag); 1078 return -EINVAL; 1079 } 1080 1081 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1082 pr_err("dev[%p]: Unable to change SE Device TAS while" 1083 " dev_export_obj: %d count exists\n", dev, 1084 atomic_read(&dev->dev_export_obj.obj_access_count)); 1085 return -EINVAL; 1086 } 1087 dev->se_sub_dev->se_dev_attrib.emulate_tas = flag; 1088 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 1089 dev, (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? "Enabled" : "Disabled"); 1090 1091 return 0; 1092 } 1093 1094 int se_dev_set_emulate_tpu(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 /* 1101 * We expect this value to be non-zero when generic Block Layer 1102 * Discard supported is detected iblock_create_virtdevice(). 1103 */ 1104 if (!dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) { 1105 pr_err("Generic Block Discard not supported\n"); 1106 return -ENOSYS; 1107 } 1108 1109 dev->se_sub_dev->se_dev_attrib.emulate_tpu = flag; 1110 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 1111 dev, flag); 1112 return 0; 1113 } 1114 1115 int se_dev_set_emulate_tpws(struct se_device *dev, int flag) 1116 { 1117 if ((flag != 0) && (flag != 1)) { 1118 pr_err("Illegal value %d\n", flag); 1119 return -EINVAL; 1120 } 1121 /* 1122 * We expect this value to be non-zero when generic Block Layer 1123 * Discard supported is detected iblock_create_virtdevice(). 1124 */ 1125 if (!dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) { 1126 pr_err("Generic Block Discard not supported\n"); 1127 return -ENOSYS; 1128 } 1129 1130 dev->se_sub_dev->se_dev_attrib.emulate_tpws = flag; 1131 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 1132 dev, flag); 1133 return 0; 1134 } 1135 1136 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag) 1137 { 1138 if ((flag != 0) && (flag != 1)) { 1139 pr_err("Illegal value %d\n", flag); 1140 return -EINVAL; 1141 } 1142 dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = flag; 1143 pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev, 1144 (dev->se_sub_dev->se_dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled"); 1145 return 0; 1146 } 1147 1148 int se_dev_set_is_nonrot(struct se_device *dev, int flag) 1149 { 1150 if ((flag != 0) && (flag != 1)) { 1151 printk(KERN_ERR "Illegal value %d\n", flag); 1152 return -EINVAL; 1153 } 1154 dev->se_sub_dev->se_dev_attrib.is_nonrot = flag; 1155 pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n", 1156 dev, flag); 1157 return 0; 1158 } 1159 1160 int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag) 1161 { 1162 if (flag != 0) { 1163 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted" 1164 " reordering not implemented\n", dev); 1165 return -ENOSYS; 1166 } 1167 dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = flag; 1168 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag); 1169 return 0; 1170 } 1171 1172 /* 1173 * Note, this can only be called on unexported SE Device Object. 1174 */ 1175 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth) 1176 { 1177 u32 orig_queue_depth = dev->queue_depth; 1178 1179 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1180 pr_err("dev[%p]: Unable to change SE Device TCQ while" 1181 " dev_export_obj: %d count exists\n", dev, 1182 atomic_read(&dev->dev_export_obj.obj_access_count)); 1183 return -EINVAL; 1184 } 1185 if (!queue_depth) { 1186 pr_err("dev[%p]: Illegal ZERO value for queue" 1187 "_depth\n", dev); 1188 return -EINVAL; 1189 } 1190 1191 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1192 if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) { 1193 pr_err("dev[%p]: Passed queue_depth: %u" 1194 " exceeds TCM/SE_Device TCQ: %u\n", 1195 dev, queue_depth, 1196 dev->se_sub_dev->se_dev_attrib.hw_queue_depth); 1197 return -EINVAL; 1198 } 1199 } else { 1200 if (queue_depth > dev->se_sub_dev->se_dev_attrib.queue_depth) { 1201 if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) { 1202 pr_err("dev[%p]: Passed queue_depth:" 1203 " %u exceeds TCM/SE_Device MAX" 1204 " TCQ: %u\n", dev, queue_depth, 1205 dev->se_sub_dev->se_dev_attrib.hw_queue_depth); 1206 return -EINVAL; 1207 } 1208 } 1209 } 1210 1211 dev->se_sub_dev->se_dev_attrib.queue_depth = dev->queue_depth = queue_depth; 1212 if (queue_depth > orig_queue_depth) 1213 atomic_add(queue_depth - orig_queue_depth, &dev->depth_left); 1214 else if (queue_depth < orig_queue_depth) 1215 atomic_sub(orig_queue_depth - queue_depth, &dev->depth_left); 1216 1217 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", 1218 dev, queue_depth); 1219 return 0; 1220 } 1221 1222 int se_dev_set_max_sectors(struct se_device *dev, u32 max_sectors) 1223 { 1224 int force = 0; /* Force setting for VDEVS */ 1225 1226 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1227 pr_err("dev[%p]: Unable to change SE Device" 1228 " max_sectors while dev_export_obj: %d count exists\n", 1229 dev, atomic_read(&dev->dev_export_obj.obj_access_count)); 1230 return -EINVAL; 1231 } 1232 if (!max_sectors) { 1233 pr_err("dev[%p]: Illegal ZERO value for" 1234 " max_sectors\n", dev); 1235 return -EINVAL; 1236 } 1237 if (max_sectors < DA_STATUS_MAX_SECTORS_MIN) { 1238 pr_err("dev[%p]: Passed max_sectors: %u less than" 1239 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, max_sectors, 1240 DA_STATUS_MAX_SECTORS_MIN); 1241 return -EINVAL; 1242 } 1243 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1244 if (max_sectors > dev->se_sub_dev->se_dev_attrib.hw_max_sectors) { 1245 pr_err("dev[%p]: Passed max_sectors: %u" 1246 " greater than TCM/SE_Device max_sectors:" 1247 " %u\n", dev, max_sectors, 1248 dev->se_sub_dev->se_dev_attrib.hw_max_sectors); 1249 return -EINVAL; 1250 } 1251 } else { 1252 if (!force && (max_sectors > 1253 dev->se_sub_dev->se_dev_attrib.hw_max_sectors)) { 1254 pr_err("dev[%p]: Passed max_sectors: %u" 1255 " greater than TCM/SE_Device max_sectors" 1256 ": %u, use force=1 to override.\n", dev, 1257 max_sectors, dev->se_sub_dev->se_dev_attrib.hw_max_sectors); 1258 return -EINVAL; 1259 } 1260 if (max_sectors > DA_STATUS_MAX_SECTORS_MAX) { 1261 pr_err("dev[%p]: Passed max_sectors: %u" 1262 " greater than DA_STATUS_MAX_SECTORS_MAX:" 1263 " %u\n", dev, max_sectors, 1264 DA_STATUS_MAX_SECTORS_MAX); 1265 return -EINVAL; 1266 } 1267 } 1268 /* 1269 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks() 1270 */ 1271 max_sectors = se_dev_align_max_sectors(max_sectors, 1272 dev->se_sub_dev->se_dev_attrib.block_size); 1273 1274 dev->se_sub_dev->se_dev_attrib.max_sectors = max_sectors; 1275 pr_debug("dev[%p]: SE Device max_sectors changed to %u\n", 1276 dev, max_sectors); 1277 return 0; 1278 } 1279 1280 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors) 1281 { 1282 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1283 pr_err("dev[%p]: Unable to change SE Device" 1284 " optimal_sectors while dev_export_obj: %d count exists\n", 1285 dev, atomic_read(&dev->dev_export_obj.obj_access_count)); 1286 return -EINVAL; 1287 } 1288 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1289 pr_err("dev[%p]: Passed optimal_sectors cannot be" 1290 " changed for TCM/pSCSI\n", dev); 1291 return -EINVAL; 1292 } 1293 if (optimal_sectors > dev->se_sub_dev->se_dev_attrib.max_sectors) { 1294 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1295 " greater than max_sectors: %u\n", dev, 1296 optimal_sectors, dev->se_sub_dev->se_dev_attrib.max_sectors); 1297 return -EINVAL; 1298 } 1299 1300 dev->se_sub_dev->se_dev_attrib.optimal_sectors = optimal_sectors; 1301 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1302 dev, optimal_sectors); 1303 return 0; 1304 } 1305 1306 int se_dev_set_block_size(struct se_device *dev, u32 block_size) 1307 { 1308 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1309 pr_err("dev[%p]: Unable to change SE Device block_size" 1310 " while dev_export_obj: %d count exists\n", dev, 1311 atomic_read(&dev->dev_export_obj.obj_access_count)); 1312 return -EINVAL; 1313 } 1314 1315 if ((block_size != 512) && 1316 (block_size != 1024) && 1317 (block_size != 2048) && 1318 (block_size != 4096)) { 1319 pr_err("dev[%p]: Illegal value for block_device: %u" 1320 " for SE device, must be 512, 1024, 2048 or 4096\n", 1321 dev, block_size); 1322 return -EINVAL; 1323 } 1324 1325 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1326 pr_err("dev[%p]: Not allowed to change block_size for" 1327 " Physical Device, use for Linux/SCSI to change" 1328 " block_size for underlying hardware\n", dev); 1329 return -EINVAL; 1330 } 1331 1332 dev->se_sub_dev->se_dev_attrib.block_size = block_size; 1333 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1334 dev, block_size); 1335 return 0; 1336 } 1337 1338 struct se_lun *core_dev_add_lun( 1339 struct se_portal_group *tpg, 1340 struct se_hba *hba, 1341 struct se_device *dev, 1342 u32 lun) 1343 { 1344 struct se_lun *lun_p; 1345 u32 lun_access = 0; 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 NULL; 1351 } 1352 1353 lun_p = core_tpg_pre_addlun(tpg, lun); 1354 if ((IS_ERR(lun_p)) || !lun_p) 1355 return NULL; 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 if (core_tpg_post_addlun(tpg, lun_p, lun_access, dev) < 0) 1363 return NULL; 1364 1365 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from" 1366 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1367 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun_p->unpacked_lun, 1368 tpg->se_tpg_tfo->get_fabric_name(), hba->hba_id); 1369 /* 1370 * Update LUN maps for dynamically added initiators when 1371 * generate_node_acl is enabled. 1372 */ 1373 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) { 1374 struct se_node_acl *acl; 1375 spin_lock_irq(&tpg->acl_node_lock); 1376 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { 1377 if (acl->dynamic_node_acl && 1378 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only || 1379 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) { 1380 spin_unlock_irq(&tpg->acl_node_lock); 1381 core_tpg_add_node_to_devs(acl, tpg); 1382 spin_lock_irq(&tpg->acl_node_lock); 1383 } 1384 } 1385 spin_unlock_irq(&tpg->acl_node_lock); 1386 } 1387 1388 return lun_p; 1389 } 1390 1391 /* core_dev_del_lun(): 1392 * 1393 * 1394 */ 1395 int core_dev_del_lun( 1396 struct se_portal_group *tpg, 1397 u32 unpacked_lun) 1398 { 1399 struct se_lun *lun; 1400 int ret = 0; 1401 1402 lun = core_tpg_pre_dellun(tpg, unpacked_lun, &ret); 1403 if (!lun) 1404 return ret; 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->se_dev_node); 1636 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list); 1637 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock); 1638 INIT_LIST_HEAD(&se_dev->t10_pr.registration_list); 1639 INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list); 1640 spin_lock_init(&se_dev->t10_pr.registration_lock); 1641 spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock); 1642 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list); 1643 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock); 1644 spin_lock_init(&se_dev->se_dev_lock); 1645 se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN; 1646 se_dev->t10_wwn.t10_sub_dev = se_dev; 1647 se_dev->t10_alua.t10_sub_dev = se_dev; 1648 se_dev->se_dev_attrib.da_sub_dev = se_dev; 1649 se_dev->se_dev_hba = hba; 1650 1651 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0"); 1652 if (!se_dev->se_dev_su_ptr) { 1653 pr_err("Unable to locate subsystem dependent pointer" 1654 " from allocate_virtdevice()\n"); 1655 ret = -ENOMEM; 1656 goto out; 1657 } 1658 lun0_su_dev = se_dev; 1659 1660 memset(buf, 0, 16); 1661 sprintf(buf, "rd_pages=8"); 1662 t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf)); 1663 1664 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr); 1665 if (IS_ERR(dev)) { 1666 ret = PTR_ERR(dev); 1667 goto out; 1668 } 1669 se_dev->se_dev_ptr = dev; 1670 g_lun0_dev = dev; 1671 1672 return 0; 1673 out: 1674 lun0_su_dev = NULL; 1675 kfree(se_dev); 1676 if (lun0_hba) { 1677 core_delete_hba(lun0_hba); 1678 lun0_hba = NULL; 1679 } 1680 return ret; 1681 } 1682 1683 1684 void core_dev_release_virtual_lun0(void) 1685 { 1686 struct se_hba *hba = lun0_hba; 1687 struct se_subsystem_dev *su_dev = lun0_su_dev; 1688 1689 if (!hba) 1690 return; 1691 1692 if (g_lun0_dev) 1693 se_free_virtual_device(g_lun0_dev, hba); 1694 1695 kfree(su_dev); 1696 core_delete_hba(hba); 1697 } 1698