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 * (c) Copyright 2003-2013 Datera, Inc. 8 * 9 * Nicholas A. Bellinger <nab@kernel.org> 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation; either version 2 of the License, or 14 * (at your option) any later version. 15 * 16 * This program is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 * GNU General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 24 * 25 ******************************************************************************/ 26 27 #include <linux/net.h> 28 #include <linux/string.h> 29 #include <linux/delay.h> 30 #include <linux/timer.h> 31 #include <linux/slab.h> 32 #include <linux/spinlock.h> 33 #include <linux/kthread.h> 34 #include <linux/in.h> 35 #include <linux/export.h> 36 #include <asm/unaligned.h> 37 #include <net/sock.h> 38 #include <net/tcp.h> 39 #include <scsi/scsi_common.h> 40 #include <scsi/scsi_proto.h> 41 42 #include <target/target_core_base.h> 43 #include <target/target_core_backend.h> 44 #include <target/target_core_fabric.h> 45 46 #include "target_core_internal.h" 47 #include "target_core_alua.h" 48 #include "target_core_pr.h" 49 #include "target_core_ua.h" 50 51 DEFINE_MUTEX(g_device_mutex); 52 LIST_HEAD(g_device_list); 53 54 static struct se_hba *lun0_hba; 55 /* not static, needed by tpg.c */ 56 struct se_device *g_lun0_dev; 57 58 sense_reason_t 59 transport_lookup_cmd_lun(struct se_cmd *se_cmd, u64 unpacked_lun) 60 { 61 struct se_lun *se_lun = NULL; 62 struct se_session *se_sess = se_cmd->se_sess; 63 struct se_node_acl *nacl = se_sess->se_node_acl; 64 struct se_dev_entry *deve; 65 66 rcu_read_lock(); 67 deve = target_nacl_find_deve(nacl, unpacked_lun); 68 if (deve) { 69 atomic_long_inc(&deve->total_cmds); 70 71 if ((se_cmd->data_direction == DMA_TO_DEVICE) && 72 (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) { 73 pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN" 74 " Access for 0x%08llx\n", 75 se_cmd->se_tfo->get_fabric_name(), 76 unpacked_lun); 77 rcu_read_unlock(); 78 return TCM_WRITE_PROTECTED; 79 } 80 81 if (se_cmd->data_direction == DMA_TO_DEVICE) 82 atomic_long_add(se_cmd->data_length, 83 &deve->write_bytes); 84 else if (se_cmd->data_direction == DMA_FROM_DEVICE) 85 atomic_long_add(se_cmd->data_length, 86 &deve->read_bytes); 87 88 se_lun = rcu_dereference(deve->se_lun); 89 se_cmd->se_lun = rcu_dereference(deve->se_lun); 90 se_cmd->pr_res_key = deve->pr_res_key; 91 se_cmd->orig_fe_lun = unpacked_lun; 92 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; 93 94 percpu_ref_get(&se_lun->lun_ref); 95 se_cmd->lun_ref_active = true; 96 } 97 rcu_read_unlock(); 98 99 if (!se_lun) { 100 /* 101 * Use the se_portal_group->tpg_virt_lun0 to allow for 102 * REPORT_LUNS, et al to be returned when no active 103 * MappedLUN=0 exists for this Initiator Port. 104 */ 105 if (unpacked_lun != 0) { 106 pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" 107 " Access for 0x%08llx\n", 108 se_cmd->se_tfo->get_fabric_name(), 109 unpacked_lun); 110 return TCM_NON_EXISTENT_LUN; 111 } 112 /* 113 * Force WRITE PROTECT for virtual LUN 0 114 */ 115 if ((se_cmd->data_direction != DMA_FROM_DEVICE) && 116 (se_cmd->data_direction != DMA_NONE)) 117 return TCM_WRITE_PROTECTED; 118 119 se_lun = se_sess->se_tpg->tpg_virt_lun0; 120 se_cmd->se_lun = se_sess->se_tpg->tpg_virt_lun0; 121 se_cmd->orig_fe_lun = 0; 122 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; 123 124 percpu_ref_get(&se_lun->lun_ref); 125 se_cmd->lun_ref_active = true; 126 } 127 /* 128 * RCU reference protected by percpu se_lun->lun_ref taken above that 129 * must drop to zero (including initial reference) before this se_lun 130 * pointer can be kfree_rcu() by the final se_lun->lun_group put via 131 * target_core_fabric_configfs.c:target_fabric_port_release 132 */ 133 se_cmd->se_dev = rcu_dereference_raw(se_lun->lun_se_dev); 134 atomic_long_inc(&se_cmd->se_dev->num_cmds); 135 136 if (se_cmd->data_direction == DMA_TO_DEVICE) 137 atomic_long_add(se_cmd->data_length, 138 &se_cmd->se_dev->write_bytes); 139 else if (se_cmd->data_direction == DMA_FROM_DEVICE) 140 atomic_long_add(se_cmd->data_length, 141 &se_cmd->se_dev->read_bytes); 142 143 return 0; 144 } 145 EXPORT_SYMBOL(transport_lookup_cmd_lun); 146 147 int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u64 unpacked_lun) 148 { 149 struct se_dev_entry *deve; 150 struct se_lun *se_lun = NULL; 151 struct se_session *se_sess = se_cmd->se_sess; 152 struct se_node_acl *nacl = se_sess->se_node_acl; 153 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req; 154 unsigned long flags; 155 156 rcu_read_lock(); 157 deve = target_nacl_find_deve(nacl, unpacked_lun); 158 if (deve) { 159 se_tmr->tmr_lun = rcu_dereference(deve->se_lun); 160 se_cmd->se_lun = rcu_dereference(deve->se_lun); 161 se_lun = rcu_dereference(deve->se_lun); 162 se_cmd->pr_res_key = deve->pr_res_key; 163 se_cmd->orig_fe_lun = unpacked_lun; 164 } 165 rcu_read_unlock(); 166 167 if (!se_lun) { 168 pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" 169 " Access for 0x%08llx\n", 170 se_cmd->se_tfo->get_fabric_name(), 171 unpacked_lun); 172 return -ENODEV; 173 } 174 /* 175 * XXX: Add percpu se_lun->lun_ref reference count for TMR 176 */ 177 se_cmd->se_dev = rcu_dereference_raw(se_lun->lun_se_dev); 178 se_tmr->tmr_dev = rcu_dereference_raw(se_lun->lun_se_dev); 179 180 spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags); 181 list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list); 182 spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags); 183 184 return 0; 185 } 186 EXPORT_SYMBOL(transport_lookup_tmr_lun); 187 188 bool target_lun_is_rdonly(struct se_cmd *cmd) 189 { 190 struct se_session *se_sess = cmd->se_sess; 191 struct se_dev_entry *deve; 192 bool ret; 193 194 rcu_read_lock(); 195 deve = target_nacl_find_deve(se_sess->se_node_acl, cmd->orig_fe_lun); 196 ret = (deve && deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY); 197 rcu_read_unlock(); 198 199 return ret; 200 } 201 EXPORT_SYMBOL(target_lun_is_rdonly); 202 203 /* 204 * This function is called from core_scsi3_emulate_pro_register_and_move() 205 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_kref 206 * when a matching rtpi is found. 207 */ 208 struct se_dev_entry *core_get_se_deve_from_rtpi( 209 struct se_node_acl *nacl, 210 u16 rtpi) 211 { 212 struct se_dev_entry *deve; 213 struct se_lun *lun; 214 struct se_portal_group *tpg = nacl->se_tpg; 215 216 rcu_read_lock(); 217 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) { 218 lun = rcu_dereference(deve->se_lun); 219 if (!lun) { 220 pr_err("%s device entries device pointer is" 221 " NULL, but Initiator has access.\n", 222 tpg->se_tpg_tfo->get_fabric_name()); 223 continue; 224 } 225 if (lun->lun_rtpi != rtpi) 226 continue; 227 228 kref_get(&deve->pr_kref); 229 rcu_read_unlock(); 230 231 return deve; 232 } 233 rcu_read_unlock(); 234 235 return NULL; 236 } 237 238 void core_free_device_list_for_node( 239 struct se_node_acl *nacl, 240 struct se_portal_group *tpg) 241 { 242 struct se_dev_entry *deve; 243 244 mutex_lock(&nacl->lun_entry_mutex); 245 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) { 246 struct se_lun *lun = rcu_dereference_check(deve->se_lun, 247 lockdep_is_held(&nacl->lun_entry_mutex)); 248 core_disable_device_list_for_node(lun, deve, nacl, tpg); 249 } 250 mutex_unlock(&nacl->lun_entry_mutex); 251 } 252 253 void core_update_device_list_access( 254 u64 mapped_lun, 255 u32 lun_access, 256 struct se_node_acl *nacl) 257 { 258 struct se_dev_entry *deve; 259 260 mutex_lock(&nacl->lun_entry_mutex); 261 deve = target_nacl_find_deve(nacl, mapped_lun); 262 if (deve) { 263 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 264 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 265 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 266 } else { 267 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 268 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 269 } 270 } 271 mutex_unlock(&nacl->lun_entry_mutex); 272 } 273 274 /* 275 * Called with rcu_read_lock or nacl->device_list_lock held. 276 */ 277 struct se_dev_entry *target_nacl_find_deve(struct se_node_acl *nacl, u64 mapped_lun) 278 { 279 struct se_dev_entry *deve; 280 281 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) 282 if (deve->mapped_lun == mapped_lun) 283 return deve; 284 285 return NULL; 286 } 287 EXPORT_SYMBOL(target_nacl_find_deve); 288 289 void target_pr_kref_release(struct kref *kref) 290 { 291 struct se_dev_entry *deve = container_of(kref, struct se_dev_entry, 292 pr_kref); 293 complete(&deve->pr_comp); 294 } 295 296 static void 297 target_luns_data_has_changed(struct se_node_acl *nacl, struct se_dev_entry *new, 298 bool skip_new) 299 { 300 struct se_dev_entry *tmp; 301 302 rcu_read_lock(); 303 hlist_for_each_entry_rcu(tmp, &nacl->lun_entry_hlist, link) { 304 if (skip_new && tmp == new) 305 continue; 306 core_scsi3_ua_allocate(tmp, 0x3F, 307 ASCQ_3FH_REPORTED_LUNS_DATA_HAS_CHANGED); 308 } 309 rcu_read_unlock(); 310 } 311 312 int core_enable_device_list_for_node( 313 struct se_lun *lun, 314 struct se_lun_acl *lun_acl, 315 u64 mapped_lun, 316 u32 lun_access, 317 struct se_node_acl *nacl, 318 struct se_portal_group *tpg) 319 { 320 struct se_dev_entry *orig, *new; 321 322 new = kzalloc(sizeof(*new), GFP_KERNEL); 323 if (!new) { 324 pr_err("Unable to allocate se_dev_entry memory\n"); 325 return -ENOMEM; 326 } 327 328 atomic_set(&new->ua_count, 0); 329 spin_lock_init(&new->ua_lock); 330 INIT_LIST_HEAD(&new->ua_list); 331 INIT_LIST_HEAD(&new->lun_link); 332 333 new->mapped_lun = mapped_lun; 334 kref_init(&new->pr_kref); 335 init_completion(&new->pr_comp); 336 337 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) 338 new->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 339 else 340 new->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 341 342 new->creation_time = get_jiffies_64(); 343 new->attach_count++; 344 345 mutex_lock(&nacl->lun_entry_mutex); 346 orig = target_nacl_find_deve(nacl, mapped_lun); 347 if (orig && orig->se_lun) { 348 struct se_lun *orig_lun = rcu_dereference_check(orig->se_lun, 349 lockdep_is_held(&nacl->lun_entry_mutex)); 350 351 if (orig_lun != lun) { 352 pr_err("Existing orig->se_lun doesn't match new lun" 353 " for dynamic -> explicit NodeACL conversion:" 354 " %s\n", nacl->initiatorname); 355 mutex_unlock(&nacl->lun_entry_mutex); 356 kfree(new); 357 return -EINVAL; 358 } 359 BUG_ON(orig->se_lun_acl != NULL); 360 361 rcu_assign_pointer(new->se_lun, lun); 362 rcu_assign_pointer(new->se_lun_acl, lun_acl); 363 hlist_del_rcu(&orig->link); 364 hlist_add_head_rcu(&new->link, &nacl->lun_entry_hlist); 365 mutex_unlock(&nacl->lun_entry_mutex); 366 367 spin_lock(&lun->lun_deve_lock); 368 list_del(&orig->lun_link); 369 list_add_tail(&new->lun_link, &lun->lun_deve_list); 370 spin_unlock(&lun->lun_deve_lock); 371 372 kref_put(&orig->pr_kref, target_pr_kref_release); 373 wait_for_completion(&orig->pr_comp); 374 375 target_luns_data_has_changed(nacl, new, true); 376 kfree_rcu(orig, rcu_head); 377 return 0; 378 } 379 380 rcu_assign_pointer(new->se_lun, lun); 381 rcu_assign_pointer(new->se_lun_acl, lun_acl); 382 hlist_add_head_rcu(&new->link, &nacl->lun_entry_hlist); 383 mutex_unlock(&nacl->lun_entry_mutex); 384 385 spin_lock(&lun->lun_deve_lock); 386 list_add_tail(&new->lun_link, &lun->lun_deve_list); 387 spin_unlock(&lun->lun_deve_lock); 388 389 target_luns_data_has_changed(nacl, new, true); 390 return 0; 391 } 392 393 /* 394 * Called with se_node_acl->lun_entry_mutex held. 395 */ 396 void core_disable_device_list_for_node( 397 struct se_lun *lun, 398 struct se_dev_entry *orig, 399 struct se_node_acl *nacl, 400 struct se_portal_group *tpg) 401 { 402 /* 403 * rcu_dereference_raw protected by se_lun->lun_group symlink 404 * reference to se_device->dev_group. 405 */ 406 struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev); 407 /* 408 * If the MappedLUN entry is being disabled, the entry in 409 * lun->lun_deve_list must be removed now before clearing the 410 * struct se_dev_entry pointers below as logic in 411 * core_alua_do_transition_tg_pt() depends on these being present. 412 * 413 * deve->se_lun_acl will be NULL for demo-mode created LUNs 414 * that have not been explicitly converted to MappedLUNs -> 415 * struct se_lun_acl, but we remove deve->lun_link from 416 * lun->lun_deve_list. This also means that active UAs and 417 * NodeACL context specific PR metadata for demo-mode 418 * MappedLUN *deve will be released below.. 419 */ 420 spin_lock(&lun->lun_deve_lock); 421 list_del(&orig->lun_link); 422 spin_unlock(&lun->lun_deve_lock); 423 /* 424 * Disable struct se_dev_entry LUN ACL mapping 425 */ 426 core_scsi3_ua_release_all(orig); 427 428 hlist_del_rcu(&orig->link); 429 clear_bit(DEF_PR_REG_ACTIVE, &orig->deve_flags); 430 rcu_assign_pointer(orig->se_lun, NULL); 431 rcu_assign_pointer(orig->se_lun_acl, NULL); 432 orig->lun_flags = 0; 433 orig->creation_time = 0; 434 orig->attach_count--; 435 /* 436 * Before firing off RCU callback, wait for any in process SPEC_I_PT=1 437 * or REGISTER_AND_MOVE PR operation to complete. 438 */ 439 kref_put(&orig->pr_kref, target_pr_kref_release); 440 wait_for_completion(&orig->pr_comp); 441 442 kfree_rcu(orig, rcu_head); 443 444 core_scsi3_free_pr_reg_from_nacl(dev, nacl); 445 target_luns_data_has_changed(nacl, NULL, false); 446 } 447 448 /* core_clear_lun_from_tpg(): 449 * 450 * 451 */ 452 void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg) 453 { 454 struct se_node_acl *nacl; 455 struct se_dev_entry *deve; 456 457 mutex_lock(&tpg->acl_node_mutex); 458 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) { 459 460 mutex_lock(&nacl->lun_entry_mutex); 461 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) { 462 struct se_lun *tmp_lun = rcu_dereference_check(deve->se_lun, 463 lockdep_is_held(&nacl->lun_entry_mutex)); 464 465 if (lun != tmp_lun) 466 continue; 467 468 core_disable_device_list_for_node(lun, deve, nacl, tpg); 469 } 470 mutex_unlock(&nacl->lun_entry_mutex); 471 } 472 mutex_unlock(&tpg->acl_node_mutex); 473 } 474 475 int core_alloc_rtpi(struct se_lun *lun, struct se_device *dev) 476 { 477 struct se_lun *tmp; 478 479 spin_lock(&dev->se_port_lock); 480 if (dev->export_count == 0x0000ffff) { 481 pr_warn("Reached dev->dev_port_count ==" 482 " 0x0000ffff\n"); 483 spin_unlock(&dev->se_port_lock); 484 return -ENOSPC; 485 } 486 again: 487 /* 488 * Allocate the next RELATIVE TARGET PORT IDENTIFIER for this struct se_device 489 * Here is the table from spc4r17 section 7.7.3.8. 490 * 491 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field 492 * 493 * Code Description 494 * 0h Reserved 495 * 1h Relative port 1, historically known as port A 496 * 2h Relative port 2, historically known as port B 497 * 3h to FFFFh Relative port 3 through 65 535 498 */ 499 lun->lun_rtpi = dev->dev_rpti_counter++; 500 if (!lun->lun_rtpi) 501 goto again; 502 503 list_for_each_entry(tmp, &dev->dev_sep_list, lun_dev_link) { 504 /* 505 * Make sure RELATIVE TARGET PORT IDENTIFIER is unique 506 * for 16-bit wrap.. 507 */ 508 if (lun->lun_rtpi == tmp->lun_rtpi) 509 goto again; 510 } 511 spin_unlock(&dev->se_port_lock); 512 513 return 0; 514 } 515 516 static void se_release_vpd_for_dev(struct se_device *dev) 517 { 518 struct t10_vpd *vpd, *vpd_tmp; 519 520 spin_lock(&dev->t10_wwn.t10_vpd_lock); 521 list_for_each_entry_safe(vpd, vpd_tmp, 522 &dev->t10_wwn.t10_vpd_list, vpd_list) { 523 list_del(&vpd->vpd_list); 524 kfree(vpd); 525 } 526 spin_unlock(&dev->t10_wwn.t10_vpd_lock); 527 } 528 529 static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size) 530 { 531 u32 aligned_max_sectors; 532 u32 alignment; 533 /* 534 * Limit max_sectors to a PAGE_SIZE aligned value for modern 535 * transport_allocate_data_tasks() operation. 536 */ 537 alignment = max(1ul, PAGE_SIZE / block_size); 538 aligned_max_sectors = rounddown(max_sectors, alignment); 539 540 if (max_sectors != aligned_max_sectors) 541 pr_info("Rounding down aligned max_sectors from %u to %u\n", 542 max_sectors, aligned_max_sectors); 543 544 return aligned_max_sectors; 545 } 546 547 int core_dev_add_lun( 548 struct se_portal_group *tpg, 549 struct se_device *dev, 550 struct se_lun *lun) 551 { 552 int rc; 553 554 rc = core_tpg_add_lun(tpg, lun, 555 TRANSPORT_LUNFLAGS_READ_WRITE, dev); 556 if (rc < 0) 557 return rc; 558 559 pr_debug("%s_TPG[%u]_LUN[%llu] - Activated %s Logical Unit from" 560 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(), 561 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, 562 tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id); 563 /* 564 * Update LUN maps for dynamically added initiators when 565 * generate_node_acl is enabled. 566 */ 567 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) { 568 struct se_node_acl *acl; 569 570 mutex_lock(&tpg->acl_node_mutex); 571 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { 572 if (acl->dynamic_node_acl && 573 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only || 574 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) { 575 core_tpg_add_node_to_devs(acl, tpg, lun); 576 } 577 } 578 mutex_unlock(&tpg->acl_node_mutex); 579 } 580 581 return 0; 582 } 583 584 /* core_dev_del_lun(): 585 * 586 * 587 */ 588 void core_dev_del_lun( 589 struct se_portal_group *tpg, 590 struct se_lun *lun) 591 { 592 pr_debug("%s_TPG[%u]_LUN[%llu] - Deactivating %s Logical Unit from" 593 " device object\n", tpg->se_tpg_tfo->get_fabric_name(), 594 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, 595 tpg->se_tpg_tfo->get_fabric_name()); 596 597 core_tpg_remove_lun(tpg, lun); 598 } 599 600 struct se_lun_acl *core_dev_init_initiator_node_lun_acl( 601 struct se_portal_group *tpg, 602 struct se_node_acl *nacl, 603 u64 mapped_lun, 604 int *ret) 605 { 606 struct se_lun_acl *lacl; 607 608 if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) { 609 pr_err("%s InitiatorName exceeds maximum size.\n", 610 tpg->se_tpg_tfo->get_fabric_name()); 611 *ret = -EOVERFLOW; 612 return NULL; 613 } 614 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL); 615 if (!lacl) { 616 pr_err("Unable to allocate memory for struct se_lun_acl.\n"); 617 *ret = -ENOMEM; 618 return NULL; 619 } 620 621 lacl->mapped_lun = mapped_lun; 622 lacl->se_lun_nacl = nacl; 623 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", 624 nacl->initiatorname); 625 626 return lacl; 627 } 628 629 int core_dev_add_initiator_node_lun_acl( 630 struct se_portal_group *tpg, 631 struct se_lun_acl *lacl, 632 struct se_lun *lun, 633 u32 lun_access) 634 { 635 struct se_node_acl *nacl = lacl->se_lun_nacl; 636 /* 637 * rcu_dereference_raw protected by se_lun->lun_group symlink 638 * reference to se_device->dev_group. 639 */ 640 struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev); 641 642 if (!nacl) 643 return -EINVAL; 644 645 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) && 646 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE)) 647 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; 648 649 lacl->se_lun = lun; 650 651 if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun, 652 lun_access, nacl, tpg) < 0) 653 return -EINVAL; 654 655 pr_debug("%s_TPG[%hu]_LUN[%llu->%llu] - Added %s ACL for " 656 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(), 657 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, lacl->mapped_lun, 658 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO", 659 lacl->initiatorname); 660 /* 661 * Check to see if there are any existing persistent reservation APTPL 662 * pre-registrations that need to be enabled for this LUN ACL.. 663 */ 664 core_scsi3_check_aptpl_registration(dev, tpg, lun, nacl, 665 lacl->mapped_lun); 666 return 0; 667 } 668 669 int core_dev_del_initiator_node_lun_acl( 670 struct se_lun *lun, 671 struct se_lun_acl *lacl) 672 { 673 struct se_portal_group *tpg = lun->lun_tpg; 674 struct se_node_acl *nacl; 675 struct se_dev_entry *deve; 676 677 nacl = lacl->se_lun_nacl; 678 if (!nacl) 679 return -EINVAL; 680 681 mutex_lock(&nacl->lun_entry_mutex); 682 deve = target_nacl_find_deve(nacl, lacl->mapped_lun); 683 if (deve) 684 core_disable_device_list_for_node(lun, deve, nacl, tpg); 685 mutex_unlock(&nacl->lun_entry_mutex); 686 687 pr_debug("%s_TPG[%hu]_LUN[%llu] - Removed ACL for" 688 " InitiatorNode: %s Mapped LUN: %llu\n", 689 tpg->se_tpg_tfo->get_fabric_name(), 690 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, 691 lacl->initiatorname, lacl->mapped_lun); 692 693 return 0; 694 } 695 696 void core_dev_free_initiator_node_lun_acl( 697 struct se_portal_group *tpg, 698 struct se_lun_acl *lacl) 699 { 700 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s" 701 " Mapped LUN: %llu\n", tpg->se_tpg_tfo->get_fabric_name(), 702 tpg->se_tpg_tfo->tpg_get_tag(tpg), 703 tpg->se_tpg_tfo->get_fabric_name(), 704 lacl->initiatorname, lacl->mapped_lun); 705 706 kfree(lacl); 707 } 708 709 static void scsi_dump_inquiry(struct se_device *dev) 710 { 711 struct t10_wwn *wwn = &dev->t10_wwn; 712 char buf[17]; 713 int i, device_type; 714 /* 715 * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer 716 */ 717 for (i = 0; i < 8; i++) 718 if (wwn->vendor[i] >= 0x20) 719 buf[i] = wwn->vendor[i]; 720 else 721 buf[i] = ' '; 722 buf[i] = '\0'; 723 pr_debug(" Vendor: %s\n", buf); 724 725 for (i = 0; i < 16; i++) 726 if (wwn->model[i] >= 0x20) 727 buf[i] = wwn->model[i]; 728 else 729 buf[i] = ' '; 730 buf[i] = '\0'; 731 pr_debug(" Model: %s\n", buf); 732 733 for (i = 0; i < 4; i++) 734 if (wwn->revision[i] >= 0x20) 735 buf[i] = wwn->revision[i]; 736 else 737 buf[i] = ' '; 738 buf[i] = '\0'; 739 pr_debug(" Revision: %s\n", buf); 740 741 device_type = dev->transport->get_device_type(dev); 742 pr_debug(" Type: %s ", scsi_device_type(device_type)); 743 } 744 745 struct se_device *target_alloc_device(struct se_hba *hba, const char *name) 746 { 747 struct se_device *dev; 748 struct se_lun *xcopy_lun; 749 750 dev = hba->backend->ops->alloc_device(hba, name); 751 if (!dev) 752 return NULL; 753 754 dev->dev_link_magic = SE_DEV_LINK_MAGIC; 755 dev->se_hba = hba; 756 dev->transport = hba->backend->ops; 757 dev->prot_length = sizeof(struct se_dif_v1_tuple); 758 dev->hba_index = hba->hba_index; 759 760 INIT_LIST_HEAD(&dev->dev_list); 761 INIT_LIST_HEAD(&dev->dev_sep_list); 762 INIT_LIST_HEAD(&dev->dev_tmr_list); 763 INIT_LIST_HEAD(&dev->delayed_cmd_list); 764 INIT_LIST_HEAD(&dev->state_list); 765 INIT_LIST_HEAD(&dev->qf_cmd_list); 766 INIT_LIST_HEAD(&dev->g_dev_node); 767 spin_lock_init(&dev->execute_task_lock); 768 spin_lock_init(&dev->delayed_cmd_lock); 769 spin_lock_init(&dev->dev_reservation_lock); 770 spin_lock_init(&dev->se_port_lock); 771 spin_lock_init(&dev->se_tmr_lock); 772 spin_lock_init(&dev->qf_cmd_lock); 773 sema_init(&dev->caw_sem, 1); 774 atomic_set(&dev->dev_ordered_id, 0); 775 INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list); 776 spin_lock_init(&dev->t10_wwn.t10_vpd_lock); 777 INIT_LIST_HEAD(&dev->t10_pr.registration_list); 778 INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list); 779 spin_lock_init(&dev->t10_pr.registration_lock); 780 spin_lock_init(&dev->t10_pr.aptpl_reg_lock); 781 INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list); 782 spin_lock_init(&dev->t10_alua.tg_pt_gps_lock); 783 INIT_LIST_HEAD(&dev->t10_alua.lba_map_list); 784 spin_lock_init(&dev->t10_alua.lba_map_lock); 785 786 dev->t10_wwn.t10_dev = dev; 787 dev->t10_alua.t10_dev = dev; 788 789 dev->dev_attrib.da_dev = dev; 790 dev->dev_attrib.emulate_model_alias = DA_EMULATE_MODEL_ALIAS; 791 dev->dev_attrib.emulate_dpo = 1; 792 dev->dev_attrib.emulate_fua_write = 1; 793 dev->dev_attrib.emulate_fua_read = 1; 794 dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE; 795 dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL; 796 dev->dev_attrib.emulate_tas = DA_EMULATE_TAS; 797 dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU; 798 dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS; 799 dev->dev_attrib.emulate_caw = DA_EMULATE_CAW; 800 dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC; 801 dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE0_PROT; 802 dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS; 803 dev->dev_attrib.force_pr_aptpl = DA_FORCE_PR_APTPL; 804 dev->dev_attrib.is_nonrot = DA_IS_NONROT; 805 dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD; 806 dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT; 807 dev->dev_attrib.max_unmap_block_desc_count = 808 DA_MAX_UNMAP_BLOCK_DESC_COUNT; 809 dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT; 810 dev->dev_attrib.unmap_granularity_alignment = 811 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT; 812 dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN; 813 814 xcopy_lun = &dev->xcopy_lun; 815 rcu_assign_pointer(xcopy_lun->lun_se_dev, dev); 816 init_completion(&xcopy_lun->lun_ref_comp); 817 INIT_LIST_HEAD(&xcopy_lun->lun_deve_list); 818 INIT_LIST_HEAD(&xcopy_lun->lun_dev_link); 819 mutex_init(&xcopy_lun->lun_tg_pt_md_mutex); 820 xcopy_lun->lun_tpg = &xcopy_pt_tpg; 821 822 return dev; 823 } 824 825 int target_configure_device(struct se_device *dev) 826 { 827 struct se_hba *hba = dev->se_hba; 828 int ret; 829 830 if (dev->dev_flags & DF_CONFIGURED) { 831 pr_err("se_dev->se_dev_ptr already set for storage" 832 " object\n"); 833 return -EEXIST; 834 } 835 836 ret = dev->transport->configure_device(dev); 837 if (ret) 838 goto out; 839 /* 840 * XXX: there is not much point to have two different values here.. 841 */ 842 dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size; 843 dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth; 844 845 /* 846 * Align max_hw_sectors down to PAGE_SIZE I/O transfers 847 */ 848 dev->dev_attrib.hw_max_sectors = 849 se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors, 850 dev->dev_attrib.hw_block_size); 851 dev->dev_attrib.optimal_sectors = dev->dev_attrib.hw_max_sectors; 852 853 dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX); 854 dev->creation_time = get_jiffies_64(); 855 856 ret = core_setup_alua(dev); 857 if (ret) 858 goto out; 859 860 /* 861 * Startup the struct se_device processing thread 862 */ 863 dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1, 864 dev->transport->name); 865 if (!dev->tmr_wq) { 866 pr_err("Unable to create tmr workqueue for %s\n", 867 dev->transport->name); 868 ret = -ENOMEM; 869 goto out_free_alua; 870 } 871 872 /* 873 * Setup work_queue for QUEUE_FULL 874 */ 875 INIT_WORK(&dev->qf_work_queue, target_qf_do_work); 876 877 /* 878 * Preload the initial INQUIRY const values if we are doing 879 * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI 880 * passthrough because this is being provided by the backend LLD. 881 */ 882 if (!(dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)) { 883 strncpy(&dev->t10_wwn.vendor[0], "LIO-ORG", 8); 884 strncpy(&dev->t10_wwn.model[0], 885 dev->transport->inquiry_prod, 16); 886 strncpy(&dev->t10_wwn.revision[0], 887 dev->transport->inquiry_rev, 4); 888 } 889 890 scsi_dump_inquiry(dev); 891 892 spin_lock(&hba->device_lock); 893 hba->dev_count++; 894 spin_unlock(&hba->device_lock); 895 896 mutex_lock(&g_device_mutex); 897 list_add_tail(&dev->g_dev_node, &g_device_list); 898 mutex_unlock(&g_device_mutex); 899 900 dev->dev_flags |= DF_CONFIGURED; 901 902 return 0; 903 904 out_free_alua: 905 core_alua_free_lu_gp_mem(dev); 906 out: 907 se_release_vpd_for_dev(dev); 908 return ret; 909 } 910 911 void target_free_device(struct se_device *dev) 912 { 913 struct se_hba *hba = dev->se_hba; 914 915 WARN_ON(!list_empty(&dev->dev_sep_list)); 916 917 if (dev->dev_flags & DF_CONFIGURED) { 918 destroy_workqueue(dev->tmr_wq); 919 920 mutex_lock(&g_device_mutex); 921 list_del(&dev->g_dev_node); 922 mutex_unlock(&g_device_mutex); 923 924 spin_lock(&hba->device_lock); 925 hba->dev_count--; 926 spin_unlock(&hba->device_lock); 927 } 928 929 core_alua_free_lu_gp_mem(dev); 930 core_alua_set_lba_map(dev, NULL, 0, 0); 931 core_scsi3_free_all_registrations(dev); 932 se_release_vpd_for_dev(dev); 933 934 if (dev->transport->free_prot) 935 dev->transport->free_prot(dev); 936 937 dev->transport->free_device(dev); 938 } 939 940 int core_dev_setup_virtual_lun0(void) 941 { 942 struct se_hba *hba; 943 struct se_device *dev; 944 char buf[] = "rd_pages=8,rd_nullio=1"; 945 int ret; 946 947 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE); 948 if (IS_ERR(hba)) 949 return PTR_ERR(hba); 950 951 dev = target_alloc_device(hba, "virt_lun0"); 952 if (!dev) { 953 ret = -ENOMEM; 954 goto out_free_hba; 955 } 956 957 hba->backend->ops->set_configfs_dev_params(dev, buf, sizeof(buf)); 958 959 ret = target_configure_device(dev); 960 if (ret) 961 goto out_free_se_dev; 962 963 lun0_hba = hba; 964 g_lun0_dev = dev; 965 return 0; 966 967 out_free_se_dev: 968 target_free_device(dev); 969 out_free_hba: 970 core_delete_hba(hba); 971 return ret; 972 } 973 974 975 void core_dev_release_virtual_lun0(void) 976 { 977 struct se_hba *hba = lun0_hba; 978 979 if (!hba) 980 return; 981 982 if (g_lun0_dev) 983 target_free_device(g_lun0_dev); 984 core_delete_hba(hba); 985 } 986 987 /* 988 * Common CDB parsing for kernel and user passthrough. 989 */ 990 sense_reason_t 991 passthrough_parse_cdb(struct se_cmd *cmd, 992 sense_reason_t (*exec_cmd)(struct se_cmd *cmd)) 993 { 994 unsigned char *cdb = cmd->t_task_cdb; 995 996 /* 997 * Clear a lun set in the cdb if the initiator talking to use spoke 998 * and old standards version, as we can't assume the underlying device 999 * won't choke up on it. 1000 */ 1001 switch (cdb[0]) { 1002 case READ_10: /* SBC - RDProtect */ 1003 case READ_12: /* SBC - RDProtect */ 1004 case READ_16: /* SBC - RDProtect */ 1005 case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */ 1006 case VERIFY: /* SBC - VRProtect */ 1007 case VERIFY_16: /* SBC - VRProtect */ 1008 case WRITE_VERIFY: /* SBC - VRProtect */ 1009 case WRITE_VERIFY_12: /* SBC - VRProtect */ 1010 case MAINTENANCE_IN: /* SPC - Parameter Data Format for SA RTPG */ 1011 break; 1012 default: 1013 cdb[1] &= 0x1f; /* clear logical unit number */ 1014 break; 1015 } 1016 1017 /* 1018 * For REPORT LUNS we always need to emulate the response, for everything 1019 * else, pass it up. 1020 */ 1021 if (cdb[0] == REPORT_LUNS) { 1022 cmd->execute_cmd = spc_emulate_report_luns; 1023 return TCM_NO_SENSE; 1024 } 1025 1026 /* Set DATA_CDB flag for ops that should have it */ 1027 switch (cdb[0]) { 1028 case READ_6: 1029 case READ_10: 1030 case READ_12: 1031 case READ_16: 1032 case WRITE_6: 1033 case WRITE_10: 1034 case WRITE_12: 1035 case WRITE_16: 1036 case WRITE_VERIFY: 1037 case WRITE_VERIFY_12: 1038 case 0x8e: /* WRITE_VERIFY_16 */ 1039 case COMPARE_AND_WRITE: 1040 case XDWRITEREAD_10: 1041 cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 1042 break; 1043 case VARIABLE_LENGTH_CMD: 1044 switch (get_unaligned_be16(&cdb[8])) { 1045 case READ_32: 1046 case WRITE_32: 1047 case 0x0c: /* WRITE_VERIFY_32 */ 1048 case XDWRITEREAD_32: 1049 cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 1050 break; 1051 } 1052 } 1053 1054 cmd->execute_cmd = exec_cmd; 1055 1056 return TCM_NO_SENSE; 1057 } 1058 EXPORT_SYMBOL(passthrough_parse_cdb); 1059