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