1 /******************************************************************************* 2 * Filename: target_core_device.c (based on iscsi_target_device.c) 3 * 4 * This file contains the iSCSI 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/smp_lock.h> 37 #include <linux/kthread.h> 38 #include <linux/in.h> 39 #include <net/sock.h> 40 #include <net/tcp.h> 41 #include <scsi/scsi.h> 42 43 #include <target/target_core_base.h> 44 #include <target/target_core_device.h> 45 #include <target/target_core_tpg.h> 46 #include <target/target_core_transport.h> 47 #include <target/target_core_fabric_ops.h> 48 49 #include "target_core_alua.h" 50 #include "target_core_hba.h" 51 #include "target_core_pr.h" 52 #include "target_core_ua.h" 53 54 static void se_dev_start(struct se_device *dev); 55 static void se_dev_stop(struct se_device *dev); 56 57 int transport_get_lun_for_cmd( 58 struct se_cmd *se_cmd, 59 unsigned char *cdb, 60 u32 unpacked_lun) 61 { 62 struct se_dev_entry *deve; 63 struct se_lun *se_lun = NULL; 64 struct se_session *se_sess = SE_SESS(se_cmd); 65 unsigned long flags; 66 int read_only = 0; 67 68 spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); 69 deve = se_cmd->se_deve = 70 &SE_NODE_ACL(se_sess)->device_list[unpacked_lun]; 71 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 72 if (se_cmd) { 73 deve->total_cmds++; 74 deve->total_bytes += se_cmd->data_length; 75 76 if (se_cmd->data_direction == DMA_TO_DEVICE) { 77 if (deve->lun_flags & 78 TRANSPORT_LUNFLAGS_READ_ONLY) { 79 read_only = 1; 80 goto out; 81 } 82 deve->write_bytes += se_cmd->data_length; 83 } else if (se_cmd->data_direction == 84 DMA_FROM_DEVICE) { 85 deve->read_bytes += se_cmd->data_length; 86 } 87 } 88 deve->deve_cmds++; 89 90 se_lun = se_cmd->se_lun = deve->se_lun; 91 se_cmd->pr_res_key = deve->pr_res_key; 92 se_cmd->orig_fe_lun = unpacked_lun; 93 se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev; 94 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; 95 } 96 out: 97 spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); 98 99 if (!se_lun) { 100 if (read_only) { 101 se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED; 102 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 103 printk("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN" 104 " Access for 0x%08x\n", 105 CMD_TFO(se_cmd)->get_fabric_name(), 106 unpacked_lun); 107 return -1; 108 } else { 109 /* 110 * Use the se_portal_group->tpg_virt_lun0 to allow for 111 * REPORT_LUNS, et al to be returned when no active 112 * MappedLUN=0 exists for this Initiator Port. 113 */ 114 if (unpacked_lun != 0) { 115 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN; 116 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 117 printk("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" 118 " Access for 0x%08x\n", 119 CMD_TFO(se_cmd)->get_fabric_name(), 120 unpacked_lun); 121 return -1; 122 } 123 /* 124 * Force WRITE PROTECT for virtual LUN 0 125 */ 126 if ((se_cmd->data_direction != DMA_FROM_DEVICE) && 127 (se_cmd->data_direction != DMA_NONE)) { 128 se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED; 129 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 130 return -1; 131 } 132 #if 0 133 printk("TARGET_CORE[%s]: Using virtual LUN0! :-)\n", 134 CMD_TFO(se_cmd)->get_fabric_name()); 135 #endif 136 se_lun = se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0; 137 se_cmd->orig_fe_lun = 0; 138 se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev; 139 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; 140 } 141 } 142 /* 143 * Determine if the struct se_lun is online. 144 */ 145 /* #warning FIXME: Check for LUN_RESET + UNIT Attention */ 146 if (se_dev_check_online(se_lun->lun_se_dev) != 0) { 147 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN; 148 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 149 return -1; 150 } 151 152 { 153 struct se_device *dev = se_lun->lun_se_dev; 154 spin_lock(&dev->stats_lock); 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(&dev->stats_lock); 161 } 162 163 /* 164 * Add the iscsi_cmd_t to the struct se_lun's cmd list. This list is used 165 * for tracking state of struct se_cmds during LUN shutdown events. 166 */ 167 spin_lock_irqsave(&se_lun->lun_cmd_lock, flags); 168 list_add_tail(&se_cmd->se_lun_list, &se_lun->lun_cmd_list); 169 atomic_set(&T_TASK(se_cmd)->transport_lun_active, 1); 170 #if 0 171 printk(KERN_INFO "Adding ITT: 0x%08x to LUN LIST[%d]\n", 172 CMD_TFO(se_cmd)->get_task_tag(se_cmd), se_lun->unpacked_lun); 173 #endif 174 spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags); 175 176 return 0; 177 } 178 EXPORT_SYMBOL(transport_get_lun_for_cmd); 179 180 int transport_get_lun_for_tmr( 181 struct se_cmd *se_cmd, 182 u32 unpacked_lun) 183 { 184 struct se_device *dev = NULL; 185 struct se_dev_entry *deve; 186 struct se_lun *se_lun = NULL; 187 struct se_session *se_sess = SE_SESS(se_cmd); 188 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req; 189 190 spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); 191 deve = se_cmd->se_deve = 192 &SE_NODE_ACL(se_sess)->device_list[unpacked_lun]; 193 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 194 se_lun = se_cmd->se_lun = se_tmr->tmr_lun = deve->se_lun; 195 dev = se_tmr->tmr_dev = se_lun->lun_se_dev; 196 se_cmd->pr_res_key = deve->pr_res_key; 197 se_cmd->orig_fe_lun = unpacked_lun; 198 se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev; 199 /* se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; */ 200 } 201 spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); 202 203 if (!se_lun) { 204 printk(KERN_INFO "TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" 205 " Access for 0x%08x\n", 206 CMD_TFO(se_cmd)->get_fabric_name(), 207 unpacked_lun); 208 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 209 return -1; 210 } 211 /* 212 * Determine if the struct se_lun is online. 213 */ 214 /* #warning FIXME: Check for LUN_RESET + UNIT Attention */ 215 if (se_dev_check_online(se_lun->lun_se_dev) != 0) { 216 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 217 return -1; 218 } 219 220 spin_lock(&dev->se_tmr_lock); 221 list_add_tail(&se_tmr->tmr_list, &dev->dev_tmr_list); 222 spin_unlock(&dev->se_tmr_lock); 223 224 return 0; 225 } 226 EXPORT_SYMBOL(transport_get_lun_for_tmr); 227 228 /* 229 * This function is called from core_scsi3_emulate_pro_register_and_move() 230 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count 231 * when a matching rtpi is found. 232 */ 233 struct se_dev_entry *core_get_se_deve_from_rtpi( 234 struct se_node_acl *nacl, 235 u16 rtpi) 236 { 237 struct se_dev_entry *deve; 238 struct se_lun *lun; 239 struct se_port *port; 240 struct se_portal_group *tpg = nacl->se_tpg; 241 u32 i; 242 243 spin_lock_irq(&nacl->device_list_lock); 244 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 245 deve = &nacl->device_list[i]; 246 247 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 248 continue; 249 250 lun = deve->se_lun; 251 if (!(lun)) { 252 printk(KERN_ERR "%s device entries device pointer is" 253 " NULL, but Initiator has access.\n", 254 TPG_TFO(tpg)->get_fabric_name()); 255 continue; 256 } 257 port = lun->lun_sep; 258 if (!(port)) { 259 printk(KERN_ERR "%s device entries device pointer is" 260 " NULL, but Initiator has access.\n", 261 TPG_TFO(tpg)->get_fabric_name()); 262 continue; 263 } 264 if (port->sep_rtpi != rtpi) 265 continue; 266 267 atomic_inc(&deve->pr_ref_count); 268 smp_mb__after_atomic_inc(); 269 spin_unlock_irq(&nacl->device_list_lock); 270 271 return deve; 272 } 273 spin_unlock_irq(&nacl->device_list_lock); 274 275 return NULL; 276 } 277 278 int core_free_device_list_for_node( 279 struct se_node_acl *nacl, 280 struct se_portal_group *tpg) 281 { 282 struct se_dev_entry *deve; 283 struct se_lun *lun; 284 u32 i; 285 286 if (!nacl->device_list) 287 return 0; 288 289 spin_lock_irq(&nacl->device_list_lock); 290 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 291 deve = &nacl->device_list[i]; 292 293 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 294 continue; 295 296 if (!deve->se_lun) { 297 printk(KERN_ERR "%s device entries device pointer is" 298 " NULL, but Initiator has access.\n", 299 TPG_TFO(tpg)->get_fabric_name()); 300 continue; 301 } 302 lun = deve->se_lun; 303 304 spin_unlock_irq(&nacl->device_list_lock); 305 core_update_device_list_for_node(lun, NULL, deve->mapped_lun, 306 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0); 307 spin_lock_irq(&nacl->device_list_lock); 308 } 309 spin_unlock_irq(&nacl->device_list_lock); 310 311 kfree(nacl->device_list); 312 nacl->device_list = NULL; 313 314 return 0; 315 } 316 317 void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd) 318 { 319 struct se_dev_entry *deve; 320 321 spin_lock_irq(&se_nacl->device_list_lock); 322 deve = &se_nacl->device_list[se_cmd->orig_fe_lun]; 323 deve->deve_cmds--; 324 spin_unlock_irq(&se_nacl->device_list_lock); 325 326 return; 327 } 328 329 void core_update_device_list_access( 330 u32 mapped_lun, 331 u32 lun_access, 332 struct se_node_acl *nacl) 333 { 334 struct se_dev_entry *deve; 335 336 spin_lock_irq(&nacl->device_list_lock); 337 deve = &nacl->device_list[mapped_lun]; 338 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 339 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 340 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 341 } else { 342 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 343 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 344 } 345 spin_unlock_irq(&nacl->device_list_lock); 346 347 return; 348 } 349 350 /* core_update_device_list_for_node(): 351 * 352 * 353 */ 354 int core_update_device_list_for_node( 355 struct se_lun *lun, 356 struct se_lun_acl *lun_acl, 357 u32 mapped_lun, 358 u32 lun_access, 359 struct se_node_acl *nacl, 360 struct se_portal_group *tpg, 361 int enable) 362 { 363 struct se_port *port = lun->lun_sep; 364 struct se_dev_entry *deve = &nacl->device_list[mapped_lun]; 365 int trans = 0; 366 /* 367 * If the MappedLUN entry is being disabled, the entry in 368 * port->sep_alua_list must be removed now before clearing the 369 * struct se_dev_entry pointers below as logic in 370 * core_alua_do_transition_tg_pt() depends on these being present. 371 */ 372 if (!(enable)) { 373 /* 374 * deve->se_lun_acl will be NULL for demo-mode created LUNs 375 * that have not been explictly concerted to MappedLUNs -> 376 * struct se_lun_acl, but we remove deve->alua_port_list from 377 * port->sep_alua_list. This also means that active UAs and 378 * NodeACL context specific PR metadata for demo-mode 379 * MappedLUN *deve will be released below.. 380 */ 381 spin_lock_bh(&port->sep_alua_lock); 382 list_del(&deve->alua_port_list); 383 spin_unlock_bh(&port->sep_alua_lock); 384 } 385 386 spin_lock_irq(&nacl->device_list_lock); 387 if (enable) { 388 /* 389 * Check if the call is handling demo mode -> explict LUN ACL 390 * transition. This transition must be for the same struct se_lun 391 * + mapped_lun that was setup in demo mode.. 392 */ 393 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 394 if (deve->se_lun_acl != NULL) { 395 printk(KERN_ERR "struct se_dev_entry->se_lun_acl" 396 " already set for demo mode -> explict" 397 " LUN ACL transition\n"); 398 spin_unlock_irq(&nacl->device_list_lock); 399 return -1; 400 } 401 if (deve->se_lun != lun) { 402 printk(KERN_ERR "struct se_dev_entry->se_lun does" 403 " match passed struct se_lun for demo mode" 404 " -> explict LUN ACL transition\n"); 405 spin_unlock_irq(&nacl->device_list_lock); 406 return -1; 407 } 408 deve->se_lun_acl = lun_acl; 409 trans = 1; 410 } else { 411 deve->se_lun = lun; 412 deve->se_lun_acl = lun_acl; 413 deve->mapped_lun = mapped_lun; 414 deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS; 415 } 416 417 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 418 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 419 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 420 } else { 421 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 422 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 423 } 424 425 if (trans) { 426 spin_unlock_irq(&nacl->device_list_lock); 427 return 0; 428 } 429 deve->creation_time = get_jiffies_64(); 430 deve->attach_count++; 431 spin_unlock_irq(&nacl->device_list_lock); 432 433 spin_lock_bh(&port->sep_alua_lock); 434 list_add_tail(&deve->alua_port_list, &port->sep_alua_list); 435 spin_unlock_bh(&port->sep_alua_lock); 436 437 return 0; 438 } 439 /* 440 * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE 441 * PR operation to complete. 442 */ 443 spin_unlock_irq(&nacl->device_list_lock); 444 while (atomic_read(&deve->pr_ref_count) != 0) 445 cpu_relax(); 446 spin_lock_irq(&nacl->device_list_lock); 447 /* 448 * Disable struct se_dev_entry LUN ACL mapping 449 */ 450 core_scsi3_ua_release_all(deve); 451 deve->se_lun = NULL; 452 deve->se_lun_acl = NULL; 453 deve->lun_flags = 0; 454 deve->creation_time = 0; 455 deve->attach_count--; 456 spin_unlock_irq(&nacl->device_list_lock); 457 458 core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl); 459 return 0; 460 } 461 462 /* core_clear_lun_from_tpg(): 463 * 464 * 465 */ 466 void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg) 467 { 468 struct se_node_acl *nacl; 469 struct se_dev_entry *deve; 470 u32 i; 471 472 spin_lock_bh(&tpg->acl_node_lock); 473 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) { 474 spin_unlock_bh(&tpg->acl_node_lock); 475 476 spin_lock_irq(&nacl->device_list_lock); 477 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 478 deve = &nacl->device_list[i]; 479 if (lun != deve->se_lun) 480 continue; 481 spin_unlock_irq(&nacl->device_list_lock); 482 483 core_update_device_list_for_node(lun, NULL, 484 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS, 485 nacl, tpg, 0); 486 487 spin_lock_irq(&nacl->device_list_lock); 488 } 489 spin_unlock_irq(&nacl->device_list_lock); 490 491 spin_lock_bh(&tpg->acl_node_lock); 492 } 493 spin_unlock_bh(&tpg->acl_node_lock); 494 495 return; 496 } 497 498 static struct se_port *core_alloc_port(struct se_device *dev) 499 { 500 struct se_port *port, *port_tmp; 501 502 port = kzalloc(sizeof(struct se_port), GFP_KERNEL); 503 if (!(port)) { 504 printk(KERN_ERR "Unable to allocate struct se_port\n"); 505 return NULL; 506 } 507 INIT_LIST_HEAD(&port->sep_alua_list); 508 INIT_LIST_HEAD(&port->sep_list); 509 atomic_set(&port->sep_tg_pt_secondary_offline, 0); 510 spin_lock_init(&port->sep_alua_lock); 511 mutex_init(&port->sep_tg_pt_md_mutex); 512 513 spin_lock(&dev->se_port_lock); 514 if (dev->dev_port_count == 0x0000ffff) { 515 printk(KERN_WARNING "Reached dev->dev_port_count ==" 516 " 0x0000ffff\n"); 517 spin_unlock(&dev->se_port_lock); 518 return NULL; 519 } 520 again: 521 /* 522 * Allocate the next RELATIVE TARGET PORT IDENTIFER for this struct se_device 523 * Here is the table from spc4r17 section 7.7.3.8. 524 * 525 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field 526 * 527 * Code Description 528 * 0h Reserved 529 * 1h Relative port 1, historically known as port A 530 * 2h Relative port 2, historically known as port B 531 * 3h to FFFFh Relative port 3 through 65 535 532 */ 533 port->sep_rtpi = dev->dev_rpti_counter++; 534 if (!(port->sep_rtpi)) 535 goto again; 536 537 list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) { 538 /* 539 * Make sure RELATIVE TARGET PORT IDENTIFER is unique 540 * for 16-bit wrap.. 541 */ 542 if (port->sep_rtpi == port_tmp->sep_rtpi) 543 goto again; 544 } 545 spin_unlock(&dev->se_port_lock); 546 547 return port; 548 } 549 550 static void core_export_port( 551 struct se_device *dev, 552 struct se_portal_group *tpg, 553 struct se_port *port, 554 struct se_lun *lun) 555 { 556 struct se_subsystem_dev *su_dev = SU_DEV(dev); 557 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL; 558 559 spin_lock(&dev->se_port_lock); 560 spin_lock(&lun->lun_sep_lock); 561 port->sep_tpg = tpg; 562 port->sep_lun = lun; 563 lun->lun_sep = port; 564 spin_unlock(&lun->lun_sep_lock); 565 566 list_add_tail(&port->sep_list, &dev->dev_sep_list); 567 spin_unlock(&dev->se_port_lock); 568 569 if (T10_ALUA(su_dev)->alua_type == SPC3_ALUA_EMULATED) { 570 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port); 571 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) { 572 printk(KERN_ERR "Unable to allocate t10_alua_tg_pt" 573 "_gp_member_t\n"); 574 return; 575 } 576 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 577 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem, 578 T10_ALUA(su_dev)->default_tg_pt_gp); 579 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 580 printk(KERN_INFO "%s/%s: Adding to default ALUA Target Port" 581 " Group: alua/default_tg_pt_gp\n", 582 TRANSPORT(dev)->name, TPG_TFO(tpg)->get_fabric_name()); 583 } 584 585 dev->dev_port_count++; 586 port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFER */ 587 } 588 589 /* 590 * Called with struct se_device->se_port_lock spinlock held. 591 */ 592 static void core_release_port(struct se_device *dev, struct se_port *port) 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 return; 610 } 611 612 int core_dev_export( 613 struct se_device *dev, 614 struct se_portal_group *tpg, 615 struct se_lun *lun) 616 { 617 struct se_port *port; 618 619 port = core_alloc_port(dev); 620 if (!(port)) 621 return -1; 622 623 lun->lun_se_dev = dev; 624 se_dev_start(dev); 625 626 atomic_inc(&dev->dev_export_obj.obj_access_count); 627 core_export_port(dev, tpg, port, lun); 628 return 0; 629 } 630 631 void core_dev_unexport( 632 struct se_device *dev, 633 struct se_portal_group *tpg, 634 struct se_lun *lun) 635 { 636 struct se_port *port = lun->lun_sep; 637 638 spin_lock(&lun->lun_sep_lock); 639 if (lun->lun_se_dev == NULL) { 640 spin_unlock(&lun->lun_sep_lock); 641 return; 642 } 643 spin_unlock(&lun->lun_sep_lock); 644 645 spin_lock(&dev->se_port_lock); 646 atomic_dec(&dev->dev_export_obj.obj_access_count); 647 core_release_port(dev, port); 648 spin_unlock(&dev->se_port_lock); 649 650 se_dev_stop(dev); 651 lun->lun_se_dev = NULL; 652 } 653 654 int transport_core_report_lun_response(struct se_cmd *se_cmd) 655 { 656 struct se_dev_entry *deve; 657 struct se_lun *se_lun; 658 struct se_session *se_sess = SE_SESS(se_cmd); 659 struct se_task *se_task; 660 unsigned char *buf = (unsigned char *)T_TASK(se_cmd)->t_task_buf; 661 u32 cdb_offset = 0, lun_count = 0, offset = 8; 662 u64 i, lun; 663 664 list_for_each_entry(se_task, &T_TASK(se_cmd)->t_task_list, t_list) 665 break; 666 667 if (!(se_task)) { 668 printk(KERN_ERR "Unable to locate struct se_task for struct se_cmd\n"); 669 return PYX_TRANSPORT_LU_COMM_FAILURE; 670 } 671 672 /* 673 * If no struct se_session pointer is present, this struct se_cmd is 674 * coming via a target_core_mod PASSTHROUGH op, and not through 675 * a $FABRIC_MOD. In that case, report LUN=0 only. 676 */ 677 if (!(se_sess)) { 678 lun = 0; 679 buf[offset++] = ((lun >> 56) & 0xff); 680 buf[offset++] = ((lun >> 48) & 0xff); 681 buf[offset++] = ((lun >> 40) & 0xff); 682 buf[offset++] = ((lun >> 32) & 0xff); 683 buf[offset++] = ((lun >> 24) & 0xff); 684 buf[offset++] = ((lun >> 16) & 0xff); 685 buf[offset++] = ((lun >> 8) & 0xff); 686 buf[offset++] = (lun & 0xff); 687 lun_count = 1; 688 goto done; 689 } 690 691 spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); 692 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 693 deve = &SE_NODE_ACL(se_sess)->device_list[i]; 694 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 695 continue; 696 se_lun = deve->se_lun; 697 /* 698 * We determine the correct LUN LIST LENGTH even once we 699 * have reached the initial allocation length. 700 * See SPC2-R20 7.19. 701 */ 702 lun_count++; 703 if ((cdb_offset + 8) >= se_cmd->data_length) 704 continue; 705 706 lun = cpu_to_be64(CMD_TFO(se_cmd)->pack_lun(deve->mapped_lun)); 707 buf[offset++] = ((lun >> 56) & 0xff); 708 buf[offset++] = ((lun >> 48) & 0xff); 709 buf[offset++] = ((lun >> 40) & 0xff); 710 buf[offset++] = ((lun >> 32) & 0xff); 711 buf[offset++] = ((lun >> 24) & 0xff); 712 buf[offset++] = ((lun >> 16) & 0xff); 713 buf[offset++] = ((lun >> 8) & 0xff); 714 buf[offset++] = (lun & 0xff); 715 cdb_offset += 8; 716 } 717 spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); 718 719 /* 720 * See SPC3 r07, page 159. 721 */ 722 done: 723 lun_count *= 8; 724 buf[0] = ((lun_count >> 24) & 0xff); 725 buf[1] = ((lun_count >> 16) & 0xff); 726 buf[2] = ((lun_count >> 8) & 0xff); 727 buf[3] = (lun_count & 0xff); 728 729 return PYX_TRANSPORT_SENT_TO_TRANSPORT; 730 } 731 732 /* se_release_device_for_hba(): 733 * 734 * 735 */ 736 void se_release_device_for_hba(struct se_device *dev) 737 { 738 struct se_hba *hba = dev->se_hba; 739 740 if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) || 741 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) || 742 (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) || 743 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) || 744 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED)) 745 se_dev_stop(dev); 746 747 if (dev->dev_ptr) { 748 kthread_stop(dev->process_thread); 749 if (dev->transport->free_device) 750 dev->transport->free_device(dev->dev_ptr); 751 } 752 753 spin_lock(&hba->device_lock); 754 list_del(&dev->dev_list); 755 hba->dev_count--; 756 spin_unlock(&hba->device_lock); 757 758 core_scsi3_free_all_registrations(dev); 759 se_release_vpd_for_dev(dev); 760 761 kfree(dev->dev_status_queue_obj); 762 kfree(dev->dev_queue_obj); 763 kfree(dev); 764 765 return; 766 } 767 768 void se_release_vpd_for_dev(struct se_device *dev) 769 { 770 struct t10_vpd *vpd, *vpd_tmp; 771 772 spin_lock(&DEV_T10_WWN(dev)->t10_vpd_lock); 773 list_for_each_entry_safe(vpd, vpd_tmp, 774 &DEV_T10_WWN(dev)->t10_vpd_list, vpd_list) { 775 list_del(&vpd->vpd_list); 776 kfree(vpd); 777 } 778 spin_unlock(&DEV_T10_WWN(dev)->t10_vpd_lock); 779 780 return; 781 } 782 783 /* 784 * Called with struct se_hba->device_lock held. 785 */ 786 void se_clear_dev_ports(struct se_device *dev) 787 { 788 struct se_hba *hba = dev->se_hba; 789 struct se_lun *lun; 790 struct se_portal_group *tpg; 791 struct se_port *sep, *sep_tmp; 792 793 spin_lock(&dev->se_port_lock); 794 list_for_each_entry_safe(sep, sep_tmp, &dev->dev_sep_list, sep_list) { 795 spin_unlock(&dev->se_port_lock); 796 spin_unlock(&hba->device_lock); 797 798 lun = sep->sep_lun; 799 tpg = sep->sep_tpg; 800 spin_lock(&lun->lun_sep_lock); 801 if (lun->lun_se_dev == NULL) { 802 spin_unlock(&lun->lun_sep_lock); 803 continue; 804 } 805 spin_unlock(&lun->lun_sep_lock); 806 807 core_dev_del_lun(tpg, lun->unpacked_lun); 808 809 spin_lock(&hba->device_lock); 810 spin_lock(&dev->se_port_lock); 811 } 812 spin_unlock(&dev->se_port_lock); 813 814 return; 815 } 816 817 /* se_free_virtual_device(): 818 * 819 * Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers. 820 */ 821 int se_free_virtual_device(struct se_device *dev, struct se_hba *hba) 822 { 823 spin_lock(&hba->device_lock); 824 se_clear_dev_ports(dev); 825 spin_unlock(&hba->device_lock); 826 827 core_alua_free_lu_gp_mem(dev); 828 se_release_device_for_hba(dev); 829 830 return 0; 831 } 832 833 static void se_dev_start(struct se_device *dev) 834 { 835 struct se_hba *hba = dev->se_hba; 836 837 spin_lock(&hba->device_lock); 838 atomic_inc(&dev->dev_obj.obj_access_count); 839 if (atomic_read(&dev->dev_obj.obj_access_count) == 1) { 840 if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) { 841 dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED; 842 dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED; 843 } else if (dev->dev_status & 844 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) { 845 dev->dev_status &= 846 ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED; 847 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED; 848 } 849 } 850 spin_unlock(&hba->device_lock); 851 } 852 853 static void se_dev_stop(struct se_device *dev) 854 { 855 struct se_hba *hba = dev->se_hba; 856 857 spin_lock(&hba->device_lock); 858 atomic_dec(&dev->dev_obj.obj_access_count); 859 if (atomic_read(&dev->dev_obj.obj_access_count) == 0) { 860 if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) { 861 dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED; 862 dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED; 863 } else if (dev->dev_status & 864 TRANSPORT_DEVICE_OFFLINE_ACTIVATED) { 865 dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED; 866 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED; 867 } 868 } 869 spin_unlock(&hba->device_lock); 870 } 871 872 int se_dev_check_online(struct se_device *dev) 873 { 874 int ret; 875 876 spin_lock_irq(&dev->dev_status_lock); 877 ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) || 878 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1; 879 spin_unlock_irq(&dev->dev_status_lock); 880 881 return ret; 882 } 883 884 int se_dev_check_shutdown(struct se_device *dev) 885 { 886 int ret; 887 888 spin_lock_irq(&dev->dev_status_lock); 889 ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN); 890 spin_unlock_irq(&dev->dev_status_lock); 891 892 return ret; 893 } 894 895 void se_dev_set_default_attribs( 896 struct se_device *dev, 897 struct se_dev_limits *dev_limits) 898 { 899 struct queue_limits *limits = &dev_limits->limits; 900 901 DEV_ATTRIB(dev)->emulate_dpo = DA_EMULATE_DPO; 902 DEV_ATTRIB(dev)->emulate_fua_write = DA_EMULATE_FUA_WRITE; 903 DEV_ATTRIB(dev)->emulate_fua_read = DA_EMULATE_FUA_READ; 904 DEV_ATTRIB(dev)->emulate_write_cache = DA_EMULATE_WRITE_CACHE; 905 DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL; 906 DEV_ATTRIB(dev)->emulate_tas = DA_EMULATE_TAS; 907 DEV_ATTRIB(dev)->emulate_tpu = DA_EMULATE_TPU; 908 DEV_ATTRIB(dev)->emulate_tpws = DA_EMULATE_TPWS; 909 DEV_ATTRIB(dev)->emulate_reservations = DA_EMULATE_RESERVATIONS; 910 DEV_ATTRIB(dev)->emulate_alua = DA_EMULATE_ALUA; 911 DEV_ATTRIB(dev)->enforce_pr_isids = DA_ENFORCE_PR_ISIDS; 912 /* 913 * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK 914 * iblock_create_virtdevice() from struct queue_limits values 915 * if blk_queue_discard()==1 916 */ 917 DEV_ATTRIB(dev)->max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT; 918 DEV_ATTRIB(dev)->max_unmap_block_desc_count = 919 DA_MAX_UNMAP_BLOCK_DESC_COUNT; 920 DEV_ATTRIB(dev)->unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT; 921 DEV_ATTRIB(dev)->unmap_granularity_alignment = 922 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT; 923 /* 924 * block_size is based on subsystem plugin dependent requirements. 925 */ 926 DEV_ATTRIB(dev)->hw_block_size = limits->logical_block_size; 927 DEV_ATTRIB(dev)->block_size = limits->logical_block_size; 928 /* 929 * max_sectors is based on subsystem plugin dependent requirements. 930 */ 931 DEV_ATTRIB(dev)->hw_max_sectors = limits->max_hw_sectors; 932 DEV_ATTRIB(dev)->max_sectors = limits->max_sectors; 933 /* 934 * Set optimal_sectors from max_sectors, which can be lowered via 935 * configfs. 936 */ 937 DEV_ATTRIB(dev)->optimal_sectors = limits->max_sectors; 938 /* 939 * queue_depth is based on subsystem plugin dependent requirements. 940 */ 941 DEV_ATTRIB(dev)->hw_queue_depth = dev_limits->hw_queue_depth; 942 DEV_ATTRIB(dev)->queue_depth = dev_limits->queue_depth; 943 } 944 945 int se_dev_set_task_timeout(struct se_device *dev, u32 task_timeout) 946 { 947 if (task_timeout > DA_TASK_TIMEOUT_MAX) { 948 printk(KERN_ERR "dev[%p]: Passed task_timeout: %u larger then" 949 " DA_TASK_TIMEOUT_MAX\n", dev, task_timeout); 950 return -1; 951 } else { 952 DEV_ATTRIB(dev)->task_timeout = task_timeout; 953 printk(KERN_INFO "dev[%p]: Set SE Device task_timeout: %u\n", 954 dev, task_timeout); 955 } 956 957 return 0; 958 } 959 960 int se_dev_set_max_unmap_lba_count( 961 struct se_device *dev, 962 u32 max_unmap_lba_count) 963 { 964 DEV_ATTRIB(dev)->max_unmap_lba_count = max_unmap_lba_count; 965 printk(KERN_INFO "dev[%p]: Set max_unmap_lba_count: %u\n", 966 dev, DEV_ATTRIB(dev)->max_unmap_lba_count); 967 return 0; 968 } 969 970 int se_dev_set_max_unmap_block_desc_count( 971 struct se_device *dev, 972 u32 max_unmap_block_desc_count) 973 { 974 DEV_ATTRIB(dev)->max_unmap_block_desc_count = max_unmap_block_desc_count; 975 printk(KERN_INFO "dev[%p]: Set max_unmap_block_desc_count: %u\n", 976 dev, DEV_ATTRIB(dev)->max_unmap_block_desc_count); 977 return 0; 978 } 979 980 int se_dev_set_unmap_granularity( 981 struct se_device *dev, 982 u32 unmap_granularity) 983 { 984 DEV_ATTRIB(dev)->unmap_granularity = unmap_granularity; 985 printk(KERN_INFO "dev[%p]: Set unmap_granularity: %u\n", 986 dev, DEV_ATTRIB(dev)->unmap_granularity); 987 return 0; 988 } 989 990 int se_dev_set_unmap_granularity_alignment( 991 struct se_device *dev, 992 u32 unmap_granularity_alignment) 993 { 994 DEV_ATTRIB(dev)->unmap_granularity_alignment = unmap_granularity_alignment; 995 printk(KERN_INFO "dev[%p]: Set unmap_granularity_alignment: %u\n", 996 dev, DEV_ATTRIB(dev)->unmap_granularity_alignment); 997 return 0; 998 } 999 1000 int se_dev_set_emulate_dpo(struct se_device *dev, int flag) 1001 { 1002 if ((flag != 0) && (flag != 1)) { 1003 printk(KERN_ERR "Illegal value %d\n", flag); 1004 return -1; 1005 } 1006 if (TRANSPORT(dev)->dpo_emulated == NULL) { 1007 printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated is NULL\n"); 1008 return -1; 1009 } 1010 if (TRANSPORT(dev)->dpo_emulated(dev) == 0) { 1011 printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated not supported\n"); 1012 return -1; 1013 } 1014 DEV_ATTRIB(dev)->emulate_dpo = flag; 1015 printk(KERN_INFO "dev[%p]: SE Device Page Out (DPO) Emulation" 1016 " bit: %d\n", dev, DEV_ATTRIB(dev)->emulate_dpo); 1017 return 0; 1018 } 1019 1020 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag) 1021 { 1022 if ((flag != 0) && (flag != 1)) { 1023 printk(KERN_ERR "Illegal value %d\n", flag); 1024 return -1; 1025 } 1026 if (TRANSPORT(dev)->fua_write_emulated == NULL) { 1027 printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated is NULL\n"); 1028 return -1; 1029 } 1030 if (TRANSPORT(dev)->fua_write_emulated(dev) == 0) { 1031 printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated not supported\n"); 1032 return -1; 1033 } 1034 DEV_ATTRIB(dev)->emulate_fua_write = flag; 1035 printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access WRITEs: %d\n", 1036 dev, DEV_ATTRIB(dev)->emulate_fua_write); 1037 return 0; 1038 } 1039 1040 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag) 1041 { 1042 if ((flag != 0) && (flag != 1)) { 1043 printk(KERN_ERR "Illegal value %d\n", flag); 1044 return -1; 1045 } 1046 if (TRANSPORT(dev)->fua_read_emulated == NULL) { 1047 printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated is NULL\n"); 1048 return -1; 1049 } 1050 if (TRANSPORT(dev)->fua_read_emulated(dev) == 0) { 1051 printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated not supported\n"); 1052 return -1; 1053 } 1054 DEV_ATTRIB(dev)->emulate_fua_read = flag; 1055 printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access READs: %d\n", 1056 dev, DEV_ATTRIB(dev)->emulate_fua_read); 1057 return 0; 1058 } 1059 1060 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag) 1061 { 1062 if ((flag != 0) && (flag != 1)) { 1063 printk(KERN_ERR "Illegal value %d\n", flag); 1064 return -1; 1065 } 1066 if (TRANSPORT(dev)->write_cache_emulated == NULL) { 1067 printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated is NULL\n"); 1068 return -1; 1069 } 1070 if (TRANSPORT(dev)->write_cache_emulated(dev) == 0) { 1071 printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated not supported\n"); 1072 return -1; 1073 } 1074 DEV_ATTRIB(dev)->emulate_write_cache = flag; 1075 printk(KERN_INFO "dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 1076 dev, DEV_ATTRIB(dev)->emulate_write_cache); 1077 return 0; 1078 } 1079 1080 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag) 1081 { 1082 if ((flag != 0) && (flag != 1) && (flag != 2)) { 1083 printk(KERN_ERR "Illegal value %d\n", flag); 1084 return -1; 1085 } 1086 1087 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1088 printk(KERN_ERR "dev[%p]: Unable to change SE Device" 1089 " UA_INTRLCK_CTRL while dev_export_obj: %d count" 1090 " exists\n", dev, 1091 atomic_read(&dev->dev_export_obj.obj_access_count)); 1092 return -1; 1093 } 1094 DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = flag; 1095 printk(KERN_INFO "dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 1096 dev, DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl); 1097 1098 return 0; 1099 } 1100 1101 int se_dev_set_emulate_tas(struct se_device *dev, int flag) 1102 { 1103 if ((flag != 0) && (flag != 1)) { 1104 printk(KERN_ERR "Illegal value %d\n", flag); 1105 return -1; 1106 } 1107 1108 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1109 printk(KERN_ERR "dev[%p]: Unable to change SE Device TAS while" 1110 " dev_export_obj: %d count exists\n", dev, 1111 atomic_read(&dev->dev_export_obj.obj_access_count)); 1112 return -1; 1113 } 1114 DEV_ATTRIB(dev)->emulate_tas = flag; 1115 printk(KERN_INFO "dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 1116 dev, (DEV_ATTRIB(dev)->emulate_tas) ? "Enabled" : "Disabled"); 1117 1118 return 0; 1119 } 1120 1121 int se_dev_set_emulate_tpu(struct se_device *dev, int flag) 1122 { 1123 if ((flag != 0) && (flag != 1)) { 1124 printk(KERN_ERR "Illegal value %d\n", flag); 1125 return -1; 1126 } 1127 /* 1128 * We expect this value to be non-zero when generic Block Layer 1129 * Discard supported is detected iblock_create_virtdevice(). 1130 */ 1131 if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) { 1132 printk(KERN_ERR "Generic Block Discard not supported\n"); 1133 return -ENOSYS; 1134 } 1135 1136 DEV_ATTRIB(dev)->emulate_tpu = flag; 1137 printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 1138 dev, flag); 1139 return 0; 1140 } 1141 1142 int se_dev_set_emulate_tpws(struct se_device *dev, int flag) 1143 { 1144 if ((flag != 0) && (flag != 1)) { 1145 printk(KERN_ERR "Illegal value %d\n", flag); 1146 return -1; 1147 } 1148 /* 1149 * We expect this value to be non-zero when generic Block Layer 1150 * Discard supported is detected iblock_create_virtdevice(). 1151 */ 1152 if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) { 1153 printk(KERN_ERR "Generic Block Discard not supported\n"); 1154 return -ENOSYS; 1155 } 1156 1157 DEV_ATTRIB(dev)->emulate_tpws = flag; 1158 printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 1159 dev, flag); 1160 return 0; 1161 } 1162 1163 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag) 1164 { 1165 if ((flag != 0) && (flag != 1)) { 1166 printk(KERN_ERR "Illegal value %d\n", flag); 1167 return -1; 1168 } 1169 DEV_ATTRIB(dev)->enforce_pr_isids = flag; 1170 printk(KERN_INFO "dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev, 1171 (DEV_ATTRIB(dev)->enforce_pr_isids) ? "Enabled" : "Disabled"); 1172 return 0; 1173 } 1174 1175 /* 1176 * Note, this can only be called on unexported SE Device Object. 1177 */ 1178 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth) 1179 { 1180 u32 orig_queue_depth = dev->queue_depth; 1181 1182 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1183 printk(KERN_ERR "dev[%p]: Unable to change SE Device TCQ while" 1184 " dev_export_obj: %d count exists\n", dev, 1185 atomic_read(&dev->dev_export_obj.obj_access_count)); 1186 return -1; 1187 } 1188 if (!(queue_depth)) { 1189 printk(KERN_ERR "dev[%p]: Illegal ZERO value for queue" 1190 "_depth\n", dev); 1191 return -1; 1192 } 1193 1194 if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1195 if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) { 1196 printk(KERN_ERR "dev[%p]: Passed queue_depth: %u" 1197 " exceeds TCM/SE_Device TCQ: %u\n", 1198 dev, queue_depth, 1199 DEV_ATTRIB(dev)->hw_queue_depth); 1200 return -1; 1201 } 1202 } else { 1203 if (queue_depth > DEV_ATTRIB(dev)->queue_depth) { 1204 if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) { 1205 printk(KERN_ERR "dev[%p]: Passed queue_depth:" 1206 " %u exceeds TCM/SE_Device MAX" 1207 " TCQ: %u\n", dev, queue_depth, 1208 DEV_ATTRIB(dev)->hw_queue_depth); 1209 return -1; 1210 } 1211 } 1212 } 1213 1214 DEV_ATTRIB(dev)->queue_depth = dev->queue_depth = queue_depth; 1215 if (queue_depth > orig_queue_depth) 1216 atomic_add(queue_depth - orig_queue_depth, &dev->depth_left); 1217 else if (queue_depth < orig_queue_depth) 1218 atomic_sub(orig_queue_depth - queue_depth, &dev->depth_left); 1219 1220 printk(KERN_INFO "dev[%p]: SE Device TCQ Depth changed to: %u\n", 1221 dev, queue_depth); 1222 return 0; 1223 } 1224 1225 int se_dev_set_max_sectors(struct se_device *dev, u32 max_sectors) 1226 { 1227 int force = 0; /* Force setting for VDEVS */ 1228 1229 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1230 printk(KERN_ERR "dev[%p]: Unable to change SE Device" 1231 " max_sectors while dev_export_obj: %d count exists\n", 1232 dev, atomic_read(&dev->dev_export_obj.obj_access_count)); 1233 return -1; 1234 } 1235 if (!(max_sectors)) { 1236 printk(KERN_ERR "dev[%p]: Illegal ZERO value for" 1237 " max_sectors\n", dev); 1238 return -1; 1239 } 1240 if (max_sectors < DA_STATUS_MAX_SECTORS_MIN) { 1241 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u less than" 1242 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, max_sectors, 1243 DA_STATUS_MAX_SECTORS_MIN); 1244 return -1; 1245 } 1246 if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1247 if (max_sectors > DEV_ATTRIB(dev)->hw_max_sectors) { 1248 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u" 1249 " greater than TCM/SE_Device max_sectors:" 1250 " %u\n", dev, max_sectors, 1251 DEV_ATTRIB(dev)->hw_max_sectors); 1252 return -1; 1253 } 1254 } else { 1255 if (!(force) && (max_sectors > 1256 DEV_ATTRIB(dev)->hw_max_sectors)) { 1257 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u" 1258 " greater than TCM/SE_Device max_sectors" 1259 ": %u, use force=1 to override.\n", dev, 1260 max_sectors, DEV_ATTRIB(dev)->hw_max_sectors); 1261 return -1; 1262 } 1263 if (max_sectors > DA_STATUS_MAX_SECTORS_MAX) { 1264 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u" 1265 " greater than DA_STATUS_MAX_SECTORS_MAX:" 1266 " %u\n", dev, max_sectors, 1267 DA_STATUS_MAX_SECTORS_MAX); 1268 return -1; 1269 } 1270 } 1271 1272 DEV_ATTRIB(dev)->max_sectors = max_sectors; 1273 printk("dev[%p]: SE Device max_sectors changed to %u\n", 1274 dev, max_sectors); 1275 return 0; 1276 } 1277 1278 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors) 1279 { 1280 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1281 printk(KERN_ERR "dev[%p]: Unable to change SE Device" 1282 " optimal_sectors while dev_export_obj: %d count exists\n", 1283 dev, atomic_read(&dev->dev_export_obj.obj_access_count)); 1284 return -EINVAL; 1285 } 1286 if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1287 printk(KERN_ERR "dev[%p]: Passed optimal_sectors cannot be" 1288 " changed for TCM/pSCSI\n", dev); 1289 return -EINVAL; 1290 } 1291 if (optimal_sectors > DEV_ATTRIB(dev)->max_sectors) { 1292 printk(KERN_ERR "dev[%p]: Passed optimal_sectors %u cannot be" 1293 " greater than max_sectors: %u\n", dev, 1294 optimal_sectors, DEV_ATTRIB(dev)->max_sectors); 1295 return -EINVAL; 1296 } 1297 1298 DEV_ATTRIB(dev)->optimal_sectors = optimal_sectors; 1299 printk(KERN_INFO "dev[%p]: SE Device optimal_sectors changed to %u\n", 1300 dev, optimal_sectors); 1301 return 0; 1302 } 1303 1304 int se_dev_set_block_size(struct se_device *dev, u32 block_size) 1305 { 1306 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1307 printk(KERN_ERR "dev[%p]: Unable to change SE Device block_size" 1308 " while dev_export_obj: %d count exists\n", dev, 1309 atomic_read(&dev->dev_export_obj.obj_access_count)); 1310 return -1; 1311 } 1312 1313 if ((block_size != 512) && 1314 (block_size != 1024) && 1315 (block_size != 2048) && 1316 (block_size != 4096)) { 1317 printk(KERN_ERR "dev[%p]: Illegal value for block_device: %u" 1318 " for SE device, must be 512, 1024, 2048 or 4096\n", 1319 dev, block_size); 1320 return -1; 1321 } 1322 1323 if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1324 printk(KERN_ERR "dev[%p]: Not allowed to change block_size for" 1325 " Physical Device, use for Linux/SCSI to change" 1326 " block_size for underlying hardware\n", dev); 1327 return -1; 1328 } 1329 1330 DEV_ATTRIB(dev)->block_size = block_size; 1331 printk(KERN_INFO "dev[%p]: SE Device block_size changed to %u\n", 1332 dev, block_size); 1333 return 0; 1334 } 1335 1336 struct se_lun *core_dev_add_lun( 1337 struct se_portal_group *tpg, 1338 struct se_hba *hba, 1339 struct se_device *dev, 1340 u32 lun) 1341 { 1342 struct se_lun *lun_p; 1343 u32 lun_access = 0; 1344 1345 if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) { 1346 printk(KERN_ERR "Unable to export struct se_device while dev_access_obj: %d\n", 1347 atomic_read(&dev->dev_access_obj.obj_access_count)); 1348 return NULL; 1349 } 1350 1351 lun_p = core_tpg_pre_addlun(tpg, lun); 1352 if ((IS_ERR(lun_p)) || !(lun_p)) 1353 return NULL; 1354 1355 if (dev->dev_flags & DF_READ_ONLY) 1356 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; 1357 else 1358 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE; 1359 1360 if (core_tpg_post_addlun(tpg, lun_p, lun_access, dev) < 0) 1361 return NULL; 1362 1363 printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from" 1364 " CORE HBA: %u\n", TPG_TFO(tpg)->get_fabric_name(), 1365 TPG_TFO(tpg)->tpg_get_tag(tpg), lun_p->unpacked_lun, 1366 TPG_TFO(tpg)->get_fabric_name(), hba->hba_id); 1367 /* 1368 * Update LUN maps for dynamically added initiators when 1369 * generate_node_acl is enabled. 1370 */ 1371 if (TPG_TFO(tpg)->tpg_check_demo_mode(tpg)) { 1372 struct se_node_acl *acl; 1373 spin_lock_bh(&tpg->acl_node_lock); 1374 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { 1375 if (acl->dynamic_node_acl) { 1376 spin_unlock_bh(&tpg->acl_node_lock); 1377 core_tpg_add_node_to_devs(acl, tpg); 1378 spin_lock_bh(&tpg->acl_node_lock); 1379 } 1380 } 1381 spin_unlock_bh(&tpg->acl_node_lock); 1382 } 1383 1384 return lun_p; 1385 } 1386 1387 /* core_dev_del_lun(): 1388 * 1389 * 1390 */ 1391 int core_dev_del_lun( 1392 struct se_portal_group *tpg, 1393 u32 unpacked_lun) 1394 { 1395 struct se_lun *lun; 1396 int ret = 0; 1397 1398 lun = core_tpg_pre_dellun(tpg, unpacked_lun, &ret); 1399 if (!(lun)) 1400 return ret; 1401 1402 core_tpg_post_dellun(tpg, lun); 1403 1404 printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from" 1405 " device object\n", TPG_TFO(tpg)->get_fabric_name(), 1406 TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun, 1407 TPG_TFO(tpg)->get_fabric_name()); 1408 1409 return 0; 1410 } 1411 1412 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun) 1413 { 1414 struct se_lun *lun; 1415 1416 spin_lock(&tpg->tpg_lun_lock); 1417 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1418 printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS" 1419 "_PER_TPG-1: %u for Target Portal Group: %hu\n", 1420 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, 1421 TRANSPORT_MAX_LUNS_PER_TPG-1, 1422 TPG_TFO(tpg)->tpg_get_tag(tpg)); 1423 spin_unlock(&tpg->tpg_lun_lock); 1424 return NULL; 1425 } 1426 lun = &tpg->tpg_lun_list[unpacked_lun]; 1427 1428 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) { 1429 printk(KERN_ERR "%s Logical Unit Number: %u is not free on" 1430 " Target Portal Group: %hu, ignoring request.\n", 1431 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, 1432 TPG_TFO(tpg)->tpg_get_tag(tpg)); 1433 spin_unlock(&tpg->tpg_lun_lock); 1434 return NULL; 1435 } 1436 spin_unlock(&tpg->tpg_lun_lock); 1437 1438 return lun; 1439 } 1440 1441 /* core_dev_get_lun(): 1442 * 1443 * 1444 */ 1445 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun) 1446 { 1447 struct se_lun *lun; 1448 1449 spin_lock(&tpg->tpg_lun_lock); 1450 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1451 printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER" 1452 "_TPG-1: %u for Target Portal Group: %hu\n", 1453 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, 1454 TRANSPORT_MAX_LUNS_PER_TPG-1, 1455 TPG_TFO(tpg)->tpg_get_tag(tpg)); 1456 spin_unlock(&tpg->tpg_lun_lock); 1457 return NULL; 1458 } 1459 lun = &tpg->tpg_lun_list[unpacked_lun]; 1460 1461 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { 1462 printk(KERN_ERR "%s Logical Unit Number: %u is not active on" 1463 " Target Portal Group: %hu, ignoring request.\n", 1464 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, 1465 TPG_TFO(tpg)->tpg_get_tag(tpg)); 1466 spin_unlock(&tpg->tpg_lun_lock); 1467 return NULL; 1468 } 1469 spin_unlock(&tpg->tpg_lun_lock); 1470 1471 return lun; 1472 } 1473 1474 struct se_lun_acl *core_dev_init_initiator_node_lun_acl( 1475 struct se_portal_group *tpg, 1476 u32 mapped_lun, 1477 char *initiatorname, 1478 int *ret) 1479 { 1480 struct se_lun_acl *lacl; 1481 struct se_node_acl *nacl; 1482 1483 if (strlen(initiatorname) > TRANSPORT_IQN_LEN) { 1484 printk(KERN_ERR "%s InitiatorName exceeds maximum size.\n", 1485 TPG_TFO(tpg)->get_fabric_name()); 1486 *ret = -EOVERFLOW; 1487 return NULL; 1488 } 1489 nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname); 1490 if (!(nacl)) { 1491 *ret = -EINVAL; 1492 return NULL; 1493 } 1494 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL); 1495 if (!(lacl)) { 1496 printk(KERN_ERR "Unable to allocate memory for struct se_lun_acl.\n"); 1497 *ret = -ENOMEM; 1498 return NULL; 1499 } 1500 1501 INIT_LIST_HEAD(&lacl->lacl_list); 1502 lacl->mapped_lun = mapped_lun; 1503 lacl->se_lun_nacl = nacl; 1504 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); 1505 1506 return lacl; 1507 } 1508 1509 int core_dev_add_initiator_node_lun_acl( 1510 struct se_portal_group *tpg, 1511 struct se_lun_acl *lacl, 1512 u32 unpacked_lun, 1513 u32 lun_access) 1514 { 1515 struct se_lun *lun; 1516 struct se_node_acl *nacl; 1517 1518 lun = core_dev_get_lun(tpg, unpacked_lun); 1519 if (!(lun)) { 1520 printk(KERN_ERR "%s Logical Unit Number: %u is not active on" 1521 " Target Portal Group: %hu, ignoring request.\n", 1522 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, 1523 TPG_TFO(tpg)->tpg_get_tag(tpg)); 1524 return -EINVAL; 1525 } 1526 1527 nacl = lacl->se_lun_nacl; 1528 if (!(nacl)) 1529 return -EINVAL; 1530 1531 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) && 1532 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE)) 1533 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; 1534 1535 lacl->se_lun = lun; 1536 1537 if (core_update_device_list_for_node(lun, lacl, lacl->mapped_lun, 1538 lun_access, nacl, tpg, 1) < 0) 1539 return -EINVAL; 1540 1541 spin_lock(&lun->lun_acl_lock); 1542 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list); 1543 atomic_inc(&lun->lun_acl_count); 1544 smp_mb__after_atomic_inc(); 1545 spin_unlock(&lun->lun_acl_lock); 1546 1547 printk(KERN_INFO "%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for " 1548 " InitiatorNode: %s\n", TPG_TFO(tpg)->get_fabric_name(), 1549 TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun, 1550 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO", 1551 lacl->initiatorname); 1552 /* 1553 * Check to see if there are any existing persistent reservation APTPL 1554 * pre-registrations that need to be enabled for this LUN ACL.. 1555 */ 1556 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl); 1557 return 0; 1558 } 1559 1560 /* core_dev_del_initiator_node_lun_acl(): 1561 * 1562 * 1563 */ 1564 int core_dev_del_initiator_node_lun_acl( 1565 struct se_portal_group *tpg, 1566 struct se_lun *lun, 1567 struct se_lun_acl *lacl) 1568 { 1569 struct se_node_acl *nacl; 1570 1571 nacl = lacl->se_lun_nacl; 1572 if (!(nacl)) 1573 return -EINVAL; 1574 1575 spin_lock(&lun->lun_acl_lock); 1576 list_del(&lacl->lacl_list); 1577 atomic_dec(&lun->lun_acl_count); 1578 smp_mb__after_atomic_dec(); 1579 spin_unlock(&lun->lun_acl_lock); 1580 1581 core_update_device_list_for_node(lun, NULL, lacl->mapped_lun, 1582 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0); 1583 1584 lacl->se_lun = NULL; 1585 1586 printk(KERN_INFO "%s_TPG[%hu]_LUN[%u] - Removed ACL for" 1587 " InitiatorNode: %s Mapped LUN: %u\n", 1588 TPG_TFO(tpg)->get_fabric_name(), 1589 TPG_TFO(tpg)->tpg_get_tag(tpg), lun->unpacked_lun, 1590 lacl->initiatorname, lacl->mapped_lun); 1591 1592 return 0; 1593 } 1594 1595 void core_dev_free_initiator_node_lun_acl( 1596 struct se_portal_group *tpg, 1597 struct se_lun_acl *lacl) 1598 { 1599 printk("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s" 1600 " Mapped LUN: %u\n", TPG_TFO(tpg)->get_fabric_name(), 1601 TPG_TFO(tpg)->tpg_get_tag(tpg), 1602 TPG_TFO(tpg)->get_fabric_name(), 1603 lacl->initiatorname, lacl->mapped_lun); 1604 1605 kfree(lacl); 1606 } 1607 1608 int core_dev_setup_virtual_lun0(void) 1609 { 1610 struct se_hba *hba; 1611 struct se_device *dev; 1612 struct se_subsystem_dev *se_dev = NULL; 1613 struct se_subsystem_api *t; 1614 char buf[16]; 1615 int ret; 1616 1617 hba = core_alloc_hba("rd_dr", 0, HBA_FLAGS_INTERNAL_USE); 1618 if (IS_ERR(hba)) 1619 return PTR_ERR(hba); 1620 1621 se_global->g_lun0_hba = hba; 1622 t = hba->transport; 1623 1624 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL); 1625 if (!(se_dev)) { 1626 printk(KERN_ERR "Unable to allocate memory for" 1627 " struct se_subsystem_dev\n"); 1628 ret = -ENOMEM; 1629 goto out; 1630 } 1631 INIT_LIST_HEAD(&se_dev->g_se_dev_list); 1632 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list); 1633 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock); 1634 INIT_LIST_HEAD(&se_dev->t10_reservation.registration_list); 1635 INIT_LIST_HEAD(&se_dev->t10_reservation.aptpl_reg_list); 1636 spin_lock_init(&se_dev->t10_reservation.registration_lock); 1637 spin_lock_init(&se_dev->t10_reservation.aptpl_reg_lock); 1638 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list); 1639 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock); 1640 spin_lock_init(&se_dev->se_dev_lock); 1641 se_dev->t10_reservation.pr_aptpl_buf_len = PR_APTPL_BUF_LEN; 1642 se_dev->t10_wwn.t10_sub_dev = se_dev; 1643 se_dev->t10_alua.t10_sub_dev = se_dev; 1644 se_dev->se_dev_attrib.da_sub_dev = se_dev; 1645 se_dev->se_dev_hba = hba; 1646 1647 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0"); 1648 if (!(se_dev->se_dev_su_ptr)) { 1649 printk(KERN_ERR "Unable to locate subsystem dependent pointer" 1650 " from allocate_virtdevice()\n"); 1651 ret = -ENOMEM; 1652 goto out; 1653 } 1654 se_global->g_lun0_su_dev = se_dev; 1655 1656 memset(buf, 0, 16); 1657 sprintf(buf, "rd_pages=8"); 1658 t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf)); 1659 1660 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr); 1661 if (!(dev) || IS_ERR(dev)) { 1662 ret = -ENOMEM; 1663 goto out; 1664 } 1665 se_dev->se_dev_ptr = dev; 1666 se_global->g_lun0_dev = dev; 1667 1668 return 0; 1669 out: 1670 se_global->g_lun0_su_dev = NULL; 1671 kfree(se_dev); 1672 if (se_global->g_lun0_hba) { 1673 core_delete_hba(se_global->g_lun0_hba); 1674 se_global->g_lun0_hba = NULL; 1675 } 1676 return ret; 1677 } 1678 1679 1680 void core_dev_release_virtual_lun0(void) 1681 { 1682 struct se_hba *hba = se_global->g_lun0_hba; 1683 struct se_subsystem_dev *su_dev = se_global->g_lun0_su_dev; 1684 1685 if (!(hba)) 1686 return; 1687 1688 if (se_global->g_lun0_dev) 1689 se_free_virtual_device(se_global->g_lun0_dev, hba); 1690 1691 kfree(su_dev); 1692 core_delete_hba(hba); 1693 } 1694