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_device.h> 46 #include <target/target_core_tpg.h> 47 #include <target/target_core_transport.h> 48 #include <target/target_core_fabric_ops.h> 49 50 #include "target_core_alua.h" 51 #include "target_core_hba.h" 52 #include "target_core_pr.h" 53 #include "target_core_ua.h" 54 55 static void se_dev_start(struct se_device *dev); 56 static void se_dev_stop(struct se_device *dev); 57 58 static struct se_hba *lun0_hba; 59 static struct se_subsystem_dev *lun0_su_dev; 60 /* not static, needed by tpg.c */ 61 struct se_device *g_lun0_dev; 62 63 int transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun) 64 { 65 struct se_lun *se_lun = NULL; 66 struct se_session *se_sess = se_cmd->se_sess; 67 struct se_device *dev; 68 unsigned long flags; 69 70 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) { 71 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN; 72 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 73 return -ENODEV; 74 } 75 76 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags); 77 se_cmd->se_deve = &se_sess->se_node_acl->device_list[unpacked_lun]; 78 if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 79 struct se_dev_entry *deve = se_cmd->se_deve; 80 81 deve->total_cmds++; 82 deve->total_bytes += se_cmd->data_length; 83 84 if ((se_cmd->data_direction == DMA_TO_DEVICE) && 85 (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) { 86 se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED; 87 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 88 pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN" 89 " Access for 0x%08x\n", 90 se_cmd->se_tfo->get_fabric_name(), 91 unpacked_lun); 92 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); 93 return -EACCES; 94 } 95 96 if (se_cmd->data_direction == DMA_TO_DEVICE) 97 deve->write_bytes += se_cmd->data_length; 98 else if (se_cmd->data_direction == DMA_FROM_DEVICE) 99 deve->read_bytes += se_cmd->data_length; 100 101 deve->deve_cmds++; 102 103 se_lun = deve->se_lun; 104 se_cmd->se_lun = deve->se_lun; 105 se_cmd->pr_res_key = deve->pr_res_key; 106 se_cmd->orig_fe_lun = unpacked_lun; 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_cmd_flags |= SCF_SE_LUN_CMD; 140 } 141 /* 142 * Determine if the struct se_lun is online. 143 * FIXME: Check for LUN_RESET + UNIT Attention 144 */ 145 if (se_dev_check_online(se_lun->lun_se_dev) != 0) { 146 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN; 147 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 148 return -ENODEV; 149 } 150 151 /* Directly associate cmd with se_dev */ 152 se_cmd->se_dev = se_lun->lun_se_dev; 153 154 /* TODO: get rid of this and use atomics for stats */ 155 dev = se_lun->lun_se_dev; 156 spin_lock_irqsave(&dev->stats_lock, flags); 157 dev->num_cmds++; 158 if (se_cmd->data_direction == DMA_TO_DEVICE) 159 dev->write_bytes += se_cmd->data_length; 160 else if (se_cmd->data_direction == DMA_FROM_DEVICE) 161 dev->read_bytes += se_cmd->data_length; 162 spin_unlock_irqrestore(&dev->stats_lock, flags); 163 164 /* 165 * Add the iscsi_cmd_t to the struct se_lun's cmd list. This list is used 166 * for tracking state of struct se_cmds during LUN shutdown events. 167 */ 168 spin_lock_irqsave(&se_lun->lun_cmd_lock, flags); 169 list_add_tail(&se_cmd->se_lun_node, &se_lun->lun_cmd_list); 170 atomic_set(&se_cmd->transport_lun_active, 1); 171 spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags); 172 173 return 0; 174 } 175 EXPORT_SYMBOL(transport_lookup_cmd_lun); 176 177 int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun) 178 { 179 struct se_dev_entry *deve; 180 struct se_lun *se_lun = NULL; 181 struct se_session *se_sess = se_cmd->se_sess; 182 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req; 183 unsigned long flags; 184 185 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) { 186 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN; 187 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 188 return -ENODEV; 189 } 190 191 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags); 192 se_cmd->se_deve = &se_sess->se_node_acl->device_list[unpacked_lun]; 193 deve = se_cmd->se_deve; 194 195 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 196 se_tmr->tmr_lun = deve->se_lun; 197 se_cmd->se_lun = deve->se_lun; 198 se_lun = deve->se_lun; 199 se_cmd->pr_res_key = deve->pr_res_key; 200 se_cmd->orig_fe_lun = unpacked_lun; 201 } 202 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); 203 204 if (!se_lun) { 205 pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" 206 " Access for 0x%08x\n", 207 se_cmd->se_tfo->get_fabric_name(), 208 unpacked_lun); 209 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 210 return -ENODEV; 211 } 212 /* 213 * Determine if the struct se_lun is online. 214 * FIXME: Check for LUN_RESET + UNIT Attention 215 */ 216 if (se_dev_check_online(se_lun->lun_se_dev) != 0) { 217 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 218 return -ENODEV; 219 } 220 221 /* Directly associate cmd with se_dev */ 222 se_cmd->se_dev = se_lun->lun_se_dev; 223 se_tmr->tmr_dev = se_lun->lun_se_dev; 224 225 spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags); 226 list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list); 227 spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags); 228 229 return 0; 230 } 231 EXPORT_SYMBOL(transport_lookup_tmr_lun); 232 233 /* 234 * This function is called from core_scsi3_emulate_pro_register_and_move() 235 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count 236 * when a matching rtpi is found. 237 */ 238 struct se_dev_entry *core_get_se_deve_from_rtpi( 239 struct se_node_acl *nacl, 240 u16 rtpi) 241 { 242 struct se_dev_entry *deve; 243 struct se_lun *lun; 244 struct se_port *port; 245 struct se_portal_group *tpg = nacl->se_tpg; 246 u32 i; 247 248 spin_lock_irq(&nacl->device_list_lock); 249 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 250 deve = &nacl->device_list[i]; 251 252 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 253 continue; 254 255 lun = deve->se_lun; 256 if (!lun) { 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 port = lun->lun_sep; 263 if (!port) { 264 pr_err("%s device entries device pointer is" 265 " NULL, but Initiator has access.\n", 266 tpg->se_tpg_tfo->get_fabric_name()); 267 continue; 268 } 269 if (port->sep_rtpi != rtpi) 270 continue; 271 272 atomic_inc(&deve->pr_ref_count); 273 smp_mb__after_atomic_inc(); 274 spin_unlock_irq(&nacl->device_list_lock); 275 276 return deve; 277 } 278 spin_unlock_irq(&nacl->device_list_lock); 279 280 return NULL; 281 } 282 283 int core_free_device_list_for_node( 284 struct se_node_acl *nacl, 285 struct se_portal_group *tpg) 286 { 287 struct se_dev_entry *deve; 288 struct se_lun *lun; 289 u32 i; 290 291 if (!nacl->device_list) 292 return 0; 293 294 spin_lock_irq(&nacl->device_list_lock); 295 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 296 deve = &nacl->device_list[i]; 297 298 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 299 continue; 300 301 if (!deve->se_lun) { 302 pr_err("%s device entries device pointer is" 303 " NULL, but Initiator has access.\n", 304 tpg->se_tpg_tfo->get_fabric_name()); 305 continue; 306 } 307 lun = deve->se_lun; 308 309 spin_unlock_irq(&nacl->device_list_lock); 310 core_update_device_list_for_node(lun, NULL, deve->mapped_lun, 311 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0); 312 spin_lock_irq(&nacl->device_list_lock); 313 } 314 spin_unlock_irq(&nacl->device_list_lock); 315 316 kfree(nacl->device_list); 317 nacl->device_list = NULL; 318 319 return 0; 320 } 321 322 void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd) 323 { 324 struct se_dev_entry *deve; 325 326 spin_lock_irq(&se_nacl->device_list_lock); 327 deve = &se_nacl->device_list[se_cmd->orig_fe_lun]; 328 deve->deve_cmds--; 329 spin_unlock_irq(&se_nacl->device_list_lock); 330 } 331 332 void core_update_device_list_access( 333 u32 mapped_lun, 334 u32 lun_access, 335 struct se_node_acl *nacl) 336 { 337 struct se_dev_entry *deve; 338 339 spin_lock_irq(&nacl->device_list_lock); 340 deve = &nacl->device_list[mapped_lun]; 341 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 342 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 343 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 344 } else { 345 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 346 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 347 } 348 spin_unlock_irq(&nacl->device_list_lock); 349 } 350 351 /* core_update_device_list_for_node(): 352 * 353 * 354 */ 355 int core_update_device_list_for_node( 356 struct se_lun *lun, 357 struct se_lun_acl *lun_acl, 358 u32 mapped_lun, 359 u32 lun_access, 360 struct se_node_acl *nacl, 361 struct se_portal_group *tpg, 362 int enable) 363 { 364 struct se_port *port = lun->lun_sep; 365 struct se_dev_entry *deve = &nacl->device_list[mapped_lun]; 366 int trans = 0; 367 /* 368 * If the MappedLUN entry is being disabled, the entry in 369 * port->sep_alua_list must be removed now before clearing the 370 * struct se_dev_entry pointers below as logic in 371 * core_alua_do_transition_tg_pt() depends on these being present. 372 */ 373 if (!enable) { 374 /* 375 * deve->se_lun_acl will be NULL for demo-mode created LUNs 376 * that have not been explicitly concerted to MappedLUNs -> 377 * struct se_lun_acl, but we remove deve->alua_port_list from 378 * port->sep_alua_list. This also means that active UAs and 379 * NodeACL context specific PR metadata for demo-mode 380 * MappedLUN *deve will be released below.. 381 */ 382 spin_lock_bh(&port->sep_alua_lock); 383 list_del(&deve->alua_port_list); 384 spin_unlock_bh(&port->sep_alua_lock); 385 } 386 387 spin_lock_irq(&nacl->device_list_lock); 388 if (enable) { 389 /* 390 * Check if the call is handling demo mode -> explict LUN ACL 391 * transition. This transition must be for the same struct se_lun 392 * + mapped_lun that was setup in demo mode.. 393 */ 394 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 395 if (deve->se_lun_acl != NULL) { 396 pr_err("struct se_dev_entry->se_lun_acl" 397 " already set for demo mode -> explict" 398 " LUN ACL transition\n"); 399 spin_unlock_irq(&nacl->device_list_lock); 400 return -EINVAL; 401 } 402 if (deve->se_lun != lun) { 403 pr_err("struct se_dev_entry->se_lun does" 404 " match passed struct se_lun for demo mode" 405 " -> explict LUN ACL transition\n"); 406 spin_unlock_irq(&nacl->device_list_lock); 407 return -EINVAL; 408 } 409 deve->se_lun_acl = lun_acl; 410 trans = 1; 411 } else { 412 deve->se_lun = lun; 413 deve->se_lun_acl = lun_acl; 414 deve->mapped_lun = mapped_lun; 415 deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS; 416 } 417 418 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 419 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 420 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 421 } else { 422 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 423 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 424 } 425 426 if (trans) { 427 spin_unlock_irq(&nacl->device_list_lock); 428 return 0; 429 } 430 deve->creation_time = get_jiffies_64(); 431 deve->attach_count++; 432 spin_unlock_irq(&nacl->device_list_lock); 433 434 spin_lock_bh(&port->sep_alua_lock); 435 list_add_tail(&deve->alua_port_list, &port->sep_alua_list); 436 spin_unlock_bh(&port->sep_alua_lock); 437 438 return 0; 439 } 440 /* 441 * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE 442 * PR operation to complete. 443 */ 444 spin_unlock_irq(&nacl->device_list_lock); 445 while (atomic_read(&deve->pr_ref_count) != 0) 446 cpu_relax(); 447 spin_lock_irq(&nacl->device_list_lock); 448 /* 449 * Disable struct se_dev_entry LUN ACL mapping 450 */ 451 core_scsi3_ua_release_all(deve); 452 deve->se_lun = NULL; 453 deve->se_lun_acl = NULL; 454 deve->lun_flags = 0; 455 deve->creation_time = 0; 456 deve->attach_count--; 457 spin_unlock_irq(&nacl->device_list_lock); 458 459 core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl); 460 return 0; 461 } 462 463 /* core_clear_lun_from_tpg(): 464 * 465 * 466 */ 467 void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg) 468 { 469 struct se_node_acl *nacl; 470 struct se_dev_entry *deve; 471 u32 i; 472 473 spin_lock_irq(&tpg->acl_node_lock); 474 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) { 475 spin_unlock_irq(&tpg->acl_node_lock); 476 477 spin_lock_irq(&nacl->device_list_lock); 478 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 479 deve = &nacl->device_list[i]; 480 if (lun != deve->se_lun) 481 continue; 482 spin_unlock_irq(&nacl->device_list_lock); 483 484 core_update_device_list_for_node(lun, NULL, 485 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS, 486 nacl, tpg, 0); 487 488 spin_lock_irq(&nacl->device_list_lock); 489 } 490 spin_unlock_irq(&nacl->device_list_lock); 491 492 spin_lock_irq(&tpg->acl_node_lock); 493 } 494 spin_unlock_irq(&tpg->acl_node_lock); 495 } 496 497 static struct se_port *core_alloc_port(struct se_device *dev) 498 { 499 struct se_port *port, *port_tmp; 500 501 port = kzalloc(sizeof(struct se_port), GFP_KERNEL); 502 if (!port) { 503 pr_err("Unable to allocate struct se_port\n"); 504 return ERR_PTR(-ENOMEM); 505 } 506 INIT_LIST_HEAD(&port->sep_alua_list); 507 INIT_LIST_HEAD(&port->sep_list); 508 atomic_set(&port->sep_tg_pt_secondary_offline, 0); 509 spin_lock_init(&port->sep_alua_lock); 510 mutex_init(&port->sep_tg_pt_md_mutex); 511 512 spin_lock(&dev->se_port_lock); 513 if (dev->dev_port_count == 0x0000ffff) { 514 pr_warn("Reached dev->dev_port_count ==" 515 " 0x0000ffff\n"); 516 spin_unlock(&dev->se_port_lock); 517 return ERR_PTR(-ENOSPC); 518 } 519 again: 520 /* 521 * Allocate the next RELATIVE TARGET PORT IDENTIFER for this struct se_device 522 * Here is the table from spc4r17 section 7.7.3.8. 523 * 524 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field 525 * 526 * Code Description 527 * 0h Reserved 528 * 1h Relative port 1, historically known as port A 529 * 2h Relative port 2, historically known as port B 530 * 3h to FFFFh Relative port 3 through 65 535 531 */ 532 port->sep_rtpi = dev->dev_rpti_counter++; 533 if (!port->sep_rtpi) 534 goto again; 535 536 list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) { 537 /* 538 * Make sure RELATIVE TARGET PORT IDENTIFER is unique 539 * for 16-bit wrap.. 540 */ 541 if (port->sep_rtpi == port_tmp->sep_rtpi) 542 goto again; 543 } 544 spin_unlock(&dev->se_port_lock); 545 546 return port; 547 } 548 549 static void core_export_port( 550 struct se_device *dev, 551 struct se_portal_group *tpg, 552 struct se_port *port, 553 struct se_lun *lun) 554 { 555 struct se_subsystem_dev *su_dev = dev->se_sub_dev; 556 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL; 557 558 spin_lock(&dev->se_port_lock); 559 spin_lock(&lun->lun_sep_lock); 560 port->sep_tpg = tpg; 561 port->sep_lun = lun; 562 lun->lun_sep = port; 563 spin_unlock(&lun->lun_sep_lock); 564 565 list_add_tail(&port->sep_list, &dev->dev_sep_list); 566 spin_unlock(&dev->se_port_lock); 567 568 if (su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) { 569 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port); 570 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) { 571 pr_err("Unable to allocate t10_alua_tg_pt" 572 "_gp_member_t\n"); 573 return; 574 } 575 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 576 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem, 577 su_dev->t10_alua.default_tg_pt_gp); 578 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 579 pr_debug("%s/%s: Adding to default ALUA Target Port" 580 " Group: alua/default_tg_pt_gp\n", 581 dev->transport->name, tpg->se_tpg_tfo->get_fabric_name()); 582 } 583 584 dev->dev_port_count++; 585 port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFER */ 586 } 587 588 /* 589 * Called with struct se_device->se_port_lock spinlock held. 590 */ 591 static void core_release_port(struct se_device *dev, struct se_port *port) 592 __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock) 593 { 594 /* 595 * Wait for any port reference for PR ALL_TG_PT=1 operation 596 * to complete in __core_scsi3_alloc_registration() 597 */ 598 spin_unlock(&dev->se_port_lock); 599 if (atomic_read(&port->sep_tg_pt_ref_cnt)) 600 cpu_relax(); 601 spin_lock(&dev->se_port_lock); 602 603 core_alua_free_tg_pt_gp_mem(port); 604 605 list_del(&port->sep_list); 606 dev->dev_port_count--; 607 kfree(port); 608 } 609 610 int core_dev_export( 611 struct se_device *dev, 612 struct se_portal_group *tpg, 613 struct se_lun *lun) 614 { 615 struct se_port *port; 616 617 port = core_alloc_port(dev); 618 if (IS_ERR(port)) 619 return PTR_ERR(port); 620 621 lun->lun_se_dev = dev; 622 se_dev_start(dev); 623 624 atomic_inc(&dev->dev_export_obj.obj_access_count); 625 core_export_port(dev, tpg, port, lun); 626 return 0; 627 } 628 629 void core_dev_unexport( 630 struct se_device *dev, 631 struct se_portal_group *tpg, 632 struct se_lun *lun) 633 { 634 struct se_port *port = lun->lun_sep; 635 636 spin_lock(&lun->lun_sep_lock); 637 if (lun->lun_se_dev == NULL) { 638 spin_unlock(&lun->lun_sep_lock); 639 return; 640 } 641 spin_unlock(&lun->lun_sep_lock); 642 643 spin_lock(&dev->se_port_lock); 644 atomic_dec(&dev->dev_export_obj.obj_access_count); 645 core_release_port(dev, port); 646 spin_unlock(&dev->se_port_lock); 647 648 se_dev_stop(dev); 649 lun->lun_se_dev = NULL; 650 } 651 652 int target_report_luns(struct se_task *se_task) 653 { 654 struct se_cmd *se_cmd = se_task->task_se_cmd; 655 struct se_dev_entry *deve; 656 struct se_lun *se_lun; 657 struct se_session *se_sess = se_cmd->se_sess; 658 unsigned char *buf; 659 u32 cdb_offset = 0, lun_count = 0, offset = 8, i; 660 661 buf = transport_kmap_first_data_page(se_cmd); 662 663 /* 664 * If no struct se_session pointer is present, this struct se_cmd is 665 * coming via a target_core_mod PASSTHROUGH op, and not through 666 * a $FABRIC_MOD. In that case, report LUN=0 only. 667 */ 668 if (!se_sess) { 669 int_to_scsilun(0, (struct scsi_lun *)&buf[offset]); 670 lun_count = 1; 671 goto done; 672 } 673 674 spin_lock_irq(&se_sess->se_node_acl->device_list_lock); 675 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 676 deve = &se_sess->se_node_acl->device_list[i]; 677 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 678 continue; 679 se_lun = deve->se_lun; 680 /* 681 * We determine the correct LUN LIST LENGTH even once we 682 * have reached the initial allocation length. 683 * See SPC2-R20 7.19. 684 */ 685 lun_count++; 686 if ((cdb_offset + 8) >= se_cmd->data_length) 687 continue; 688 689 int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]); 690 offset += 8; 691 cdb_offset += 8; 692 } 693 spin_unlock_irq(&se_sess->se_node_acl->device_list_lock); 694 695 /* 696 * See SPC3 r07, page 159. 697 */ 698 done: 699 transport_kunmap_first_data_page(se_cmd); 700 lun_count *= 8; 701 buf[0] = ((lun_count >> 24) & 0xff); 702 buf[1] = ((lun_count >> 16) & 0xff); 703 buf[2] = ((lun_count >> 8) & 0xff); 704 buf[3] = (lun_count & 0xff); 705 706 se_task->task_scsi_status = GOOD; 707 transport_complete_task(se_task, 1); 708 return 0; 709 } 710 711 /* se_release_device_for_hba(): 712 * 713 * 714 */ 715 void se_release_device_for_hba(struct se_device *dev) 716 { 717 struct se_hba *hba = dev->se_hba; 718 719 if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) || 720 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) || 721 (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) || 722 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) || 723 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED)) 724 se_dev_stop(dev); 725 726 if (dev->dev_ptr) { 727 kthread_stop(dev->process_thread); 728 if (dev->transport->free_device) 729 dev->transport->free_device(dev->dev_ptr); 730 } 731 732 spin_lock(&hba->device_lock); 733 list_del(&dev->dev_list); 734 hba->dev_count--; 735 spin_unlock(&hba->device_lock); 736 737 core_scsi3_free_all_registrations(dev); 738 se_release_vpd_for_dev(dev); 739 740 kfree(dev); 741 } 742 743 void se_release_vpd_for_dev(struct se_device *dev) 744 { 745 struct t10_vpd *vpd, *vpd_tmp; 746 747 spin_lock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock); 748 list_for_each_entry_safe(vpd, vpd_tmp, 749 &dev->se_sub_dev->t10_wwn.t10_vpd_list, vpd_list) { 750 list_del(&vpd->vpd_list); 751 kfree(vpd); 752 } 753 spin_unlock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock); 754 } 755 756 /* se_free_virtual_device(): 757 * 758 * Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers. 759 */ 760 int se_free_virtual_device(struct se_device *dev, struct se_hba *hba) 761 { 762 if (!list_empty(&dev->dev_sep_list)) 763 dump_stack(); 764 765 core_alua_free_lu_gp_mem(dev); 766 se_release_device_for_hba(dev); 767 768 return 0; 769 } 770 771 static void se_dev_start(struct se_device *dev) 772 { 773 struct se_hba *hba = dev->se_hba; 774 775 spin_lock(&hba->device_lock); 776 atomic_inc(&dev->dev_obj.obj_access_count); 777 if (atomic_read(&dev->dev_obj.obj_access_count) == 1) { 778 if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) { 779 dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED; 780 dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED; 781 } else if (dev->dev_status & 782 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) { 783 dev->dev_status &= 784 ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED; 785 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED; 786 } 787 } 788 spin_unlock(&hba->device_lock); 789 } 790 791 static void se_dev_stop(struct se_device *dev) 792 { 793 struct se_hba *hba = dev->se_hba; 794 795 spin_lock(&hba->device_lock); 796 atomic_dec(&dev->dev_obj.obj_access_count); 797 if (atomic_read(&dev->dev_obj.obj_access_count) == 0) { 798 if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) { 799 dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED; 800 dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED; 801 } else if (dev->dev_status & 802 TRANSPORT_DEVICE_OFFLINE_ACTIVATED) { 803 dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED; 804 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED; 805 } 806 } 807 spin_unlock(&hba->device_lock); 808 } 809 810 int se_dev_check_online(struct se_device *dev) 811 { 812 unsigned long flags; 813 int ret; 814 815 spin_lock_irqsave(&dev->dev_status_lock, flags); 816 ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) || 817 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1; 818 spin_unlock_irqrestore(&dev->dev_status_lock, flags); 819 820 return ret; 821 } 822 823 int se_dev_check_shutdown(struct se_device *dev) 824 { 825 int ret; 826 827 spin_lock_irq(&dev->dev_status_lock); 828 ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN); 829 spin_unlock_irq(&dev->dev_status_lock); 830 831 return ret; 832 } 833 834 u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size) 835 { 836 u32 tmp, aligned_max_sectors; 837 /* 838 * Limit max_sectors to a PAGE_SIZE aligned value for modern 839 * transport_allocate_data_tasks() operation. 840 */ 841 tmp = rounddown((max_sectors * block_size), PAGE_SIZE); 842 aligned_max_sectors = (tmp / block_size); 843 if (max_sectors != aligned_max_sectors) { 844 printk(KERN_INFO "Rounding down aligned max_sectors from %u" 845 " to %u\n", max_sectors, aligned_max_sectors); 846 return aligned_max_sectors; 847 } 848 849 return max_sectors; 850 } 851 852 void se_dev_set_default_attribs( 853 struct se_device *dev, 854 struct se_dev_limits *dev_limits) 855 { 856 struct queue_limits *limits = &dev_limits->limits; 857 858 dev->se_sub_dev->se_dev_attrib.emulate_dpo = DA_EMULATE_DPO; 859 dev->se_sub_dev->se_dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE; 860 dev->se_sub_dev->se_dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ; 861 dev->se_sub_dev->se_dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE; 862 dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL; 863 dev->se_sub_dev->se_dev_attrib.emulate_tas = DA_EMULATE_TAS; 864 dev->se_sub_dev->se_dev_attrib.emulate_tpu = DA_EMULATE_TPU; 865 dev->se_sub_dev->se_dev_attrib.emulate_tpws = DA_EMULATE_TPWS; 866 dev->se_sub_dev->se_dev_attrib.emulate_reservations = DA_EMULATE_RESERVATIONS; 867 dev->se_sub_dev->se_dev_attrib.emulate_alua = DA_EMULATE_ALUA; 868 dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS; 869 dev->se_sub_dev->se_dev_attrib.is_nonrot = DA_IS_NONROT; 870 dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD; 871 /* 872 * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK 873 * iblock_create_virtdevice() from struct queue_limits values 874 * if blk_queue_discard()==1 875 */ 876 dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT; 877 dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count = 878 DA_MAX_UNMAP_BLOCK_DESC_COUNT; 879 dev->se_sub_dev->se_dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT; 880 dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment = 881 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT; 882 /* 883 * block_size is based on subsystem plugin dependent requirements. 884 */ 885 dev->se_sub_dev->se_dev_attrib.hw_block_size = limits->logical_block_size; 886 dev->se_sub_dev->se_dev_attrib.block_size = limits->logical_block_size; 887 /* 888 * max_sectors is based on subsystem plugin dependent requirements. 889 */ 890 dev->se_sub_dev->se_dev_attrib.hw_max_sectors = limits->max_hw_sectors; 891 /* 892 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks() 893 */ 894 limits->max_sectors = se_dev_align_max_sectors(limits->max_sectors, 895 limits->logical_block_size); 896 dev->se_sub_dev->se_dev_attrib.max_sectors = limits->max_sectors; 897 /* 898 * Set optimal_sectors from max_sectors, which can be lowered via 899 * configfs. 900 */ 901 dev->se_sub_dev->se_dev_attrib.optimal_sectors = limits->max_sectors; 902 /* 903 * queue_depth is based on subsystem plugin dependent requirements. 904 */ 905 dev->se_sub_dev->se_dev_attrib.hw_queue_depth = dev_limits->hw_queue_depth; 906 dev->se_sub_dev->se_dev_attrib.queue_depth = dev_limits->queue_depth; 907 } 908 909 int se_dev_set_max_unmap_lba_count( 910 struct se_device *dev, 911 u32 max_unmap_lba_count) 912 { 913 dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = max_unmap_lba_count; 914 pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n", 915 dev, dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count); 916 return 0; 917 } 918 919 int se_dev_set_max_unmap_block_desc_count( 920 struct se_device *dev, 921 u32 max_unmap_block_desc_count) 922 { 923 dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count = 924 max_unmap_block_desc_count; 925 pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n", 926 dev, dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count); 927 return 0; 928 } 929 930 int se_dev_set_unmap_granularity( 931 struct se_device *dev, 932 u32 unmap_granularity) 933 { 934 dev->se_sub_dev->se_dev_attrib.unmap_granularity = unmap_granularity; 935 pr_debug("dev[%p]: Set unmap_granularity: %u\n", 936 dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity); 937 return 0; 938 } 939 940 int se_dev_set_unmap_granularity_alignment( 941 struct se_device *dev, 942 u32 unmap_granularity_alignment) 943 { 944 dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment; 945 pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n", 946 dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment); 947 return 0; 948 } 949 950 int se_dev_set_emulate_dpo(struct se_device *dev, int flag) 951 { 952 if (flag != 0 && flag != 1) { 953 pr_err("Illegal value %d\n", flag); 954 return -EINVAL; 955 } 956 957 if (flag) { 958 pr_err("dpo_emulated not supported\n"); 959 return -EINVAL; 960 } 961 962 return 0; 963 } 964 965 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag) 966 { 967 if (flag != 0 && flag != 1) { 968 pr_err("Illegal value %d\n", flag); 969 return -EINVAL; 970 } 971 972 if (flag && dev->transport->fua_write_emulated == 0) { 973 pr_err("fua_write_emulated not supported\n"); 974 return -EINVAL; 975 } 976 dev->se_sub_dev->se_dev_attrib.emulate_fua_write = flag; 977 pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n", 978 dev, dev->se_sub_dev->se_dev_attrib.emulate_fua_write); 979 return 0; 980 } 981 982 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag) 983 { 984 if (flag != 0 && flag != 1) { 985 pr_err("Illegal value %d\n", flag); 986 return -EINVAL; 987 } 988 989 if (flag) { 990 pr_err("ua read emulated not supported\n"); 991 return -EINVAL; 992 } 993 994 return 0; 995 } 996 997 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag) 998 { 999 if (flag != 0 && flag != 1) { 1000 pr_err("Illegal value %d\n", flag); 1001 return -EINVAL; 1002 } 1003 if (flag && dev->transport->write_cache_emulated == 0) { 1004 pr_err("write_cache_emulated not supported\n"); 1005 return -EINVAL; 1006 } 1007 dev->se_sub_dev->se_dev_attrib.emulate_write_cache = flag; 1008 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 1009 dev, dev->se_sub_dev->se_dev_attrib.emulate_write_cache); 1010 return 0; 1011 } 1012 1013 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag) 1014 { 1015 if ((flag != 0) && (flag != 1) && (flag != 2)) { 1016 pr_err("Illegal value %d\n", flag); 1017 return -EINVAL; 1018 } 1019 1020 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1021 pr_err("dev[%p]: Unable to change SE Device" 1022 " UA_INTRLCK_CTRL while dev_export_obj: %d count" 1023 " exists\n", dev, 1024 atomic_read(&dev->dev_export_obj.obj_access_count)); 1025 return -EINVAL; 1026 } 1027 dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = flag; 1028 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 1029 dev, dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl); 1030 1031 return 0; 1032 } 1033 1034 int se_dev_set_emulate_tas(struct se_device *dev, int flag) 1035 { 1036 if ((flag != 0) && (flag != 1)) { 1037 pr_err("Illegal value %d\n", flag); 1038 return -EINVAL; 1039 } 1040 1041 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1042 pr_err("dev[%p]: Unable to change SE Device TAS while" 1043 " dev_export_obj: %d count exists\n", dev, 1044 atomic_read(&dev->dev_export_obj.obj_access_count)); 1045 return -EINVAL; 1046 } 1047 dev->se_sub_dev->se_dev_attrib.emulate_tas = flag; 1048 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 1049 dev, (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? "Enabled" : "Disabled"); 1050 1051 return 0; 1052 } 1053 1054 int se_dev_set_emulate_tpu(struct se_device *dev, int flag) 1055 { 1056 if ((flag != 0) && (flag != 1)) { 1057 pr_err("Illegal value %d\n", flag); 1058 return -EINVAL; 1059 } 1060 /* 1061 * We expect this value to be non-zero when generic Block Layer 1062 * Discard supported is detected iblock_create_virtdevice(). 1063 */ 1064 if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) { 1065 pr_err("Generic Block Discard not supported\n"); 1066 return -ENOSYS; 1067 } 1068 1069 dev->se_sub_dev->se_dev_attrib.emulate_tpu = flag; 1070 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 1071 dev, flag); 1072 return 0; 1073 } 1074 1075 int se_dev_set_emulate_tpws(struct se_device *dev, int flag) 1076 { 1077 if ((flag != 0) && (flag != 1)) { 1078 pr_err("Illegal value %d\n", flag); 1079 return -EINVAL; 1080 } 1081 /* 1082 * We expect this value to be non-zero when generic Block Layer 1083 * Discard supported is detected iblock_create_virtdevice(). 1084 */ 1085 if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) { 1086 pr_err("Generic Block Discard not supported\n"); 1087 return -ENOSYS; 1088 } 1089 1090 dev->se_sub_dev->se_dev_attrib.emulate_tpws = flag; 1091 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 1092 dev, flag); 1093 return 0; 1094 } 1095 1096 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag) 1097 { 1098 if ((flag != 0) && (flag != 1)) { 1099 pr_err("Illegal value %d\n", flag); 1100 return -EINVAL; 1101 } 1102 dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = flag; 1103 pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev, 1104 (dev->se_sub_dev->se_dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled"); 1105 return 0; 1106 } 1107 1108 int se_dev_set_is_nonrot(struct se_device *dev, int flag) 1109 { 1110 if ((flag != 0) && (flag != 1)) { 1111 printk(KERN_ERR "Illegal value %d\n", flag); 1112 return -EINVAL; 1113 } 1114 dev->se_sub_dev->se_dev_attrib.is_nonrot = flag; 1115 pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n", 1116 dev, flag); 1117 return 0; 1118 } 1119 1120 int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag) 1121 { 1122 if (flag != 0) { 1123 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted" 1124 " reordering not implemented\n", dev); 1125 return -ENOSYS; 1126 } 1127 dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = flag; 1128 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag); 1129 return 0; 1130 } 1131 1132 /* 1133 * Note, this can only be called on unexported SE Device Object. 1134 */ 1135 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth) 1136 { 1137 u32 orig_queue_depth = dev->queue_depth; 1138 1139 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1140 pr_err("dev[%p]: Unable to change SE Device TCQ while" 1141 " dev_export_obj: %d count exists\n", dev, 1142 atomic_read(&dev->dev_export_obj.obj_access_count)); 1143 return -EINVAL; 1144 } 1145 if (!queue_depth) { 1146 pr_err("dev[%p]: Illegal ZERO value for queue" 1147 "_depth\n", dev); 1148 return -EINVAL; 1149 } 1150 1151 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1152 if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) { 1153 pr_err("dev[%p]: Passed queue_depth: %u" 1154 " exceeds TCM/SE_Device TCQ: %u\n", 1155 dev, queue_depth, 1156 dev->se_sub_dev->se_dev_attrib.hw_queue_depth); 1157 return -EINVAL; 1158 } 1159 } else { 1160 if (queue_depth > dev->se_sub_dev->se_dev_attrib.queue_depth) { 1161 if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) { 1162 pr_err("dev[%p]: Passed queue_depth:" 1163 " %u exceeds TCM/SE_Device MAX" 1164 " TCQ: %u\n", dev, queue_depth, 1165 dev->se_sub_dev->se_dev_attrib.hw_queue_depth); 1166 return -EINVAL; 1167 } 1168 } 1169 } 1170 1171 dev->se_sub_dev->se_dev_attrib.queue_depth = dev->queue_depth = queue_depth; 1172 if (queue_depth > orig_queue_depth) 1173 atomic_add(queue_depth - orig_queue_depth, &dev->depth_left); 1174 else if (queue_depth < orig_queue_depth) 1175 atomic_sub(orig_queue_depth - queue_depth, &dev->depth_left); 1176 1177 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", 1178 dev, queue_depth); 1179 return 0; 1180 } 1181 1182 int se_dev_set_max_sectors(struct se_device *dev, u32 max_sectors) 1183 { 1184 int force = 0; /* Force setting for VDEVS */ 1185 1186 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1187 pr_err("dev[%p]: Unable to change SE Device" 1188 " max_sectors while dev_export_obj: %d count exists\n", 1189 dev, atomic_read(&dev->dev_export_obj.obj_access_count)); 1190 return -EINVAL; 1191 } 1192 if (!max_sectors) { 1193 pr_err("dev[%p]: Illegal ZERO value for" 1194 " max_sectors\n", dev); 1195 return -EINVAL; 1196 } 1197 if (max_sectors < DA_STATUS_MAX_SECTORS_MIN) { 1198 pr_err("dev[%p]: Passed max_sectors: %u less than" 1199 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, max_sectors, 1200 DA_STATUS_MAX_SECTORS_MIN); 1201 return -EINVAL; 1202 } 1203 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1204 if (max_sectors > dev->se_sub_dev->se_dev_attrib.hw_max_sectors) { 1205 pr_err("dev[%p]: Passed max_sectors: %u" 1206 " greater than TCM/SE_Device max_sectors:" 1207 " %u\n", dev, max_sectors, 1208 dev->se_sub_dev->se_dev_attrib.hw_max_sectors); 1209 return -EINVAL; 1210 } 1211 } else { 1212 if (!force && (max_sectors > 1213 dev->se_sub_dev->se_dev_attrib.hw_max_sectors)) { 1214 pr_err("dev[%p]: Passed max_sectors: %u" 1215 " greater than TCM/SE_Device max_sectors" 1216 ": %u, use force=1 to override.\n", dev, 1217 max_sectors, dev->se_sub_dev->se_dev_attrib.hw_max_sectors); 1218 return -EINVAL; 1219 } 1220 if (max_sectors > DA_STATUS_MAX_SECTORS_MAX) { 1221 pr_err("dev[%p]: Passed max_sectors: %u" 1222 " greater than DA_STATUS_MAX_SECTORS_MAX:" 1223 " %u\n", dev, max_sectors, 1224 DA_STATUS_MAX_SECTORS_MAX); 1225 return -EINVAL; 1226 } 1227 } 1228 /* 1229 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks() 1230 */ 1231 max_sectors = se_dev_align_max_sectors(max_sectors, 1232 dev->se_sub_dev->se_dev_attrib.block_size); 1233 1234 dev->se_sub_dev->se_dev_attrib.max_sectors = max_sectors; 1235 pr_debug("dev[%p]: SE Device max_sectors changed to %u\n", 1236 dev, max_sectors); 1237 return 0; 1238 } 1239 1240 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors) 1241 { 1242 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1243 pr_err("dev[%p]: Unable to change SE Device" 1244 " optimal_sectors while dev_export_obj: %d count exists\n", 1245 dev, atomic_read(&dev->dev_export_obj.obj_access_count)); 1246 return -EINVAL; 1247 } 1248 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1249 pr_err("dev[%p]: Passed optimal_sectors cannot be" 1250 " changed for TCM/pSCSI\n", dev); 1251 return -EINVAL; 1252 } 1253 if (optimal_sectors > dev->se_sub_dev->se_dev_attrib.max_sectors) { 1254 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1255 " greater than max_sectors: %u\n", dev, 1256 optimal_sectors, dev->se_sub_dev->se_dev_attrib.max_sectors); 1257 return -EINVAL; 1258 } 1259 1260 dev->se_sub_dev->se_dev_attrib.optimal_sectors = optimal_sectors; 1261 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1262 dev, optimal_sectors); 1263 return 0; 1264 } 1265 1266 int se_dev_set_block_size(struct se_device *dev, u32 block_size) 1267 { 1268 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1269 pr_err("dev[%p]: Unable to change SE Device block_size" 1270 " while dev_export_obj: %d count exists\n", dev, 1271 atomic_read(&dev->dev_export_obj.obj_access_count)); 1272 return -EINVAL; 1273 } 1274 1275 if ((block_size != 512) && 1276 (block_size != 1024) && 1277 (block_size != 2048) && 1278 (block_size != 4096)) { 1279 pr_err("dev[%p]: Illegal value for block_device: %u" 1280 " for SE device, must be 512, 1024, 2048 or 4096\n", 1281 dev, block_size); 1282 return -EINVAL; 1283 } 1284 1285 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1286 pr_err("dev[%p]: Not allowed to change block_size for" 1287 " Physical Device, use for Linux/SCSI to change" 1288 " block_size for underlying hardware\n", dev); 1289 return -EINVAL; 1290 } 1291 1292 dev->se_sub_dev->se_dev_attrib.block_size = block_size; 1293 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1294 dev, block_size); 1295 return 0; 1296 } 1297 1298 struct se_lun *core_dev_add_lun( 1299 struct se_portal_group *tpg, 1300 struct se_hba *hba, 1301 struct se_device *dev, 1302 u32 lun) 1303 { 1304 struct se_lun *lun_p; 1305 u32 lun_access = 0; 1306 1307 if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) { 1308 pr_err("Unable to export struct se_device while dev_access_obj: %d\n", 1309 atomic_read(&dev->dev_access_obj.obj_access_count)); 1310 return NULL; 1311 } 1312 1313 lun_p = core_tpg_pre_addlun(tpg, lun); 1314 if ((IS_ERR(lun_p)) || !lun_p) 1315 return NULL; 1316 1317 if (dev->dev_flags & DF_READ_ONLY) 1318 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; 1319 else 1320 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE; 1321 1322 if (core_tpg_post_addlun(tpg, lun_p, lun_access, dev) < 0) 1323 return NULL; 1324 1325 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from" 1326 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1327 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun_p->unpacked_lun, 1328 tpg->se_tpg_tfo->get_fabric_name(), hba->hba_id); 1329 /* 1330 * Update LUN maps for dynamically added initiators when 1331 * generate_node_acl is enabled. 1332 */ 1333 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) { 1334 struct se_node_acl *acl; 1335 spin_lock_irq(&tpg->acl_node_lock); 1336 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { 1337 if (acl->dynamic_node_acl && 1338 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only || 1339 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) { 1340 spin_unlock_irq(&tpg->acl_node_lock); 1341 core_tpg_add_node_to_devs(acl, tpg); 1342 spin_lock_irq(&tpg->acl_node_lock); 1343 } 1344 } 1345 spin_unlock_irq(&tpg->acl_node_lock); 1346 } 1347 1348 return lun_p; 1349 } 1350 1351 /* core_dev_del_lun(): 1352 * 1353 * 1354 */ 1355 int core_dev_del_lun( 1356 struct se_portal_group *tpg, 1357 u32 unpacked_lun) 1358 { 1359 struct se_lun *lun; 1360 int ret = 0; 1361 1362 lun = core_tpg_pre_dellun(tpg, unpacked_lun, &ret); 1363 if (!lun) 1364 return ret; 1365 1366 core_tpg_post_dellun(tpg, lun); 1367 1368 pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from" 1369 " device object\n", tpg->se_tpg_tfo->get_fabric_name(), 1370 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, 1371 tpg->se_tpg_tfo->get_fabric_name()); 1372 1373 return 0; 1374 } 1375 1376 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun) 1377 { 1378 struct se_lun *lun; 1379 1380 spin_lock(&tpg->tpg_lun_lock); 1381 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1382 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS" 1383 "_PER_TPG-1: %u for Target Portal Group: %hu\n", 1384 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1385 TRANSPORT_MAX_LUNS_PER_TPG-1, 1386 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1387 spin_unlock(&tpg->tpg_lun_lock); 1388 return NULL; 1389 } 1390 lun = &tpg->tpg_lun_list[unpacked_lun]; 1391 1392 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) { 1393 pr_err("%s Logical Unit Number: %u is not free on" 1394 " Target Portal Group: %hu, ignoring request.\n", 1395 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1396 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1397 spin_unlock(&tpg->tpg_lun_lock); 1398 return NULL; 1399 } 1400 spin_unlock(&tpg->tpg_lun_lock); 1401 1402 return lun; 1403 } 1404 1405 /* core_dev_get_lun(): 1406 * 1407 * 1408 */ 1409 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun) 1410 { 1411 struct se_lun *lun; 1412 1413 spin_lock(&tpg->tpg_lun_lock); 1414 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1415 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER" 1416 "_TPG-1: %u for Target Portal Group: %hu\n", 1417 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1418 TRANSPORT_MAX_LUNS_PER_TPG-1, 1419 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1420 spin_unlock(&tpg->tpg_lun_lock); 1421 return NULL; 1422 } 1423 lun = &tpg->tpg_lun_list[unpacked_lun]; 1424 1425 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { 1426 pr_err("%s Logical Unit Number: %u is not active on" 1427 " Target Portal Group: %hu, ignoring request.\n", 1428 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1429 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1430 spin_unlock(&tpg->tpg_lun_lock); 1431 return NULL; 1432 } 1433 spin_unlock(&tpg->tpg_lun_lock); 1434 1435 return lun; 1436 } 1437 1438 struct se_lun_acl *core_dev_init_initiator_node_lun_acl( 1439 struct se_portal_group *tpg, 1440 u32 mapped_lun, 1441 char *initiatorname, 1442 int *ret) 1443 { 1444 struct se_lun_acl *lacl; 1445 struct se_node_acl *nacl; 1446 1447 if (strlen(initiatorname) >= TRANSPORT_IQN_LEN) { 1448 pr_err("%s InitiatorName exceeds maximum size.\n", 1449 tpg->se_tpg_tfo->get_fabric_name()); 1450 *ret = -EOVERFLOW; 1451 return NULL; 1452 } 1453 nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname); 1454 if (!nacl) { 1455 *ret = -EINVAL; 1456 return NULL; 1457 } 1458 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL); 1459 if (!lacl) { 1460 pr_err("Unable to allocate memory for struct se_lun_acl.\n"); 1461 *ret = -ENOMEM; 1462 return NULL; 1463 } 1464 1465 INIT_LIST_HEAD(&lacl->lacl_list); 1466 lacl->mapped_lun = mapped_lun; 1467 lacl->se_lun_nacl = nacl; 1468 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); 1469 1470 return lacl; 1471 } 1472 1473 int core_dev_add_initiator_node_lun_acl( 1474 struct se_portal_group *tpg, 1475 struct se_lun_acl *lacl, 1476 u32 unpacked_lun, 1477 u32 lun_access) 1478 { 1479 struct se_lun *lun; 1480 struct se_node_acl *nacl; 1481 1482 lun = core_dev_get_lun(tpg, unpacked_lun); 1483 if (!lun) { 1484 pr_err("%s Logical Unit Number: %u is not active on" 1485 " Target Portal Group: %hu, ignoring request.\n", 1486 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 1487 tpg->se_tpg_tfo->tpg_get_tag(tpg)); 1488 return -EINVAL; 1489 } 1490 1491 nacl = lacl->se_lun_nacl; 1492 if (!nacl) 1493 return -EINVAL; 1494 1495 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) && 1496 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE)) 1497 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; 1498 1499 lacl->se_lun = lun; 1500 1501 if (core_update_device_list_for_node(lun, lacl, lacl->mapped_lun, 1502 lun_access, nacl, tpg, 1) < 0) 1503 return -EINVAL; 1504 1505 spin_lock(&lun->lun_acl_lock); 1506 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list); 1507 atomic_inc(&lun->lun_acl_count); 1508 smp_mb__after_atomic_inc(); 1509 spin_unlock(&lun->lun_acl_lock); 1510 1511 pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for " 1512 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(), 1513 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun, 1514 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO", 1515 lacl->initiatorname); 1516 /* 1517 * Check to see if there are any existing persistent reservation APTPL 1518 * pre-registrations that need to be enabled for this LUN ACL.. 1519 */ 1520 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl); 1521 return 0; 1522 } 1523 1524 /* core_dev_del_initiator_node_lun_acl(): 1525 * 1526 * 1527 */ 1528 int core_dev_del_initiator_node_lun_acl( 1529 struct se_portal_group *tpg, 1530 struct se_lun *lun, 1531 struct se_lun_acl *lacl) 1532 { 1533 struct se_node_acl *nacl; 1534 1535 nacl = lacl->se_lun_nacl; 1536 if (!nacl) 1537 return -EINVAL; 1538 1539 spin_lock(&lun->lun_acl_lock); 1540 list_del(&lacl->lacl_list); 1541 atomic_dec(&lun->lun_acl_count); 1542 smp_mb__after_atomic_dec(); 1543 spin_unlock(&lun->lun_acl_lock); 1544 1545 core_update_device_list_for_node(lun, NULL, lacl->mapped_lun, 1546 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0); 1547 1548 lacl->se_lun = NULL; 1549 1550 pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for" 1551 " InitiatorNode: %s Mapped LUN: %u\n", 1552 tpg->se_tpg_tfo->get_fabric_name(), 1553 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, 1554 lacl->initiatorname, lacl->mapped_lun); 1555 1556 return 0; 1557 } 1558 1559 void core_dev_free_initiator_node_lun_acl( 1560 struct se_portal_group *tpg, 1561 struct se_lun_acl *lacl) 1562 { 1563 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s" 1564 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 1565 tpg->se_tpg_tfo->tpg_get_tag(tpg), 1566 tpg->se_tpg_tfo->get_fabric_name(), 1567 lacl->initiatorname, lacl->mapped_lun); 1568 1569 kfree(lacl); 1570 } 1571 1572 int core_dev_setup_virtual_lun0(void) 1573 { 1574 struct se_hba *hba; 1575 struct se_device *dev; 1576 struct se_subsystem_dev *se_dev = NULL; 1577 struct se_subsystem_api *t; 1578 char buf[16]; 1579 int ret; 1580 1581 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE); 1582 if (IS_ERR(hba)) 1583 return PTR_ERR(hba); 1584 1585 lun0_hba = hba; 1586 t = hba->transport; 1587 1588 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL); 1589 if (!se_dev) { 1590 pr_err("Unable to allocate memory for" 1591 " struct se_subsystem_dev\n"); 1592 ret = -ENOMEM; 1593 goto out; 1594 } 1595 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list); 1596 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock); 1597 INIT_LIST_HEAD(&se_dev->t10_pr.registration_list); 1598 INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list); 1599 spin_lock_init(&se_dev->t10_pr.registration_lock); 1600 spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock); 1601 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list); 1602 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock); 1603 spin_lock_init(&se_dev->se_dev_lock); 1604 se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN; 1605 se_dev->t10_wwn.t10_sub_dev = se_dev; 1606 se_dev->t10_alua.t10_sub_dev = se_dev; 1607 se_dev->se_dev_attrib.da_sub_dev = se_dev; 1608 se_dev->se_dev_hba = hba; 1609 1610 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0"); 1611 if (!se_dev->se_dev_su_ptr) { 1612 pr_err("Unable to locate subsystem dependent pointer" 1613 " from allocate_virtdevice()\n"); 1614 ret = -ENOMEM; 1615 goto out; 1616 } 1617 lun0_su_dev = se_dev; 1618 1619 memset(buf, 0, 16); 1620 sprintf(buf, "rd_pages=8"); 1621 t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf)); 1622 1623 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr); 1624 if (IS_ERR(dev)) { 1625 ret = PTR_ERR(dev); 1626 goto out; 1627 } 1628 se_dev->se_dev_ptr = dev; 1629 g_lun0_dev = dev; 1630 1631 return 0; 1632 out: 1633 lun0_su_dev = NULL; 1634 kfree(se_dev); 1635 if (lun0_hba) { 1636 core_delete_hba(lun0_hba); 1637 lun0_hba = NULL; 1638 } 1639 return ret; 1640 } 1641 1642 1643 void core_dev_release_virtual_lun0(void) 1644 { 1645 struct se_hba *hba = lun0_hba; 1646 struct se_subsystem_dev *su_dev = lun0_su_dev; 1647 1648 if (!hba) 1649 return; 1650 1651 if (g_lun0_dev) 1652 se_free_virtual_device(g_lun0_dev, hba); 1653 1654 kfree(su_dev); 1655 core_delete_hba(hba); 1656 } 1657