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/kthread.h> 37 #include <linux/in.h> 38 #include <net/sock.h> 39 #include <net/tcp.h> 40 #include <scsi/scsi.h> 41 42 #include <target/target_core_base.h> 43 #include <target/target_core_device.h> 44 #include <target/target_core_tpg.h> 45 #include <target/target_core_transport.h> 46 #include <target/target_core_fabric_ops.h> 47 48 #include "target_core_alua.h" 49 #include "target_core_hba.h" 50 #include "target_core_pr.h" 51 #include "target_core_ua.h" 52 53 static void se_dev_start(struct se_device *dev); 54 static void se_dev_stop(struct se_device *dev); 55 56 int transport_get_lun_for_cmd( 57 struct se_cmd *se_cmd, 58 unsigned char *cdb, 59 u32 unpacked_lun) 60 { 61 struct se_dev_entry *deve; 62 struct se_lun *se_lun = NULL; 63 struct se_session *se_sess = SE_SESS(se_cmd); 64 unsigned long flags; 65 int read_only = 0; 66 67 spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); 68 deve = se_cmd->se_deve = 69 &SE_NODE_ACL(se_sess)->device_list[unpacked_lun]; 70 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 71 if (se_cmd) { 72 deve->total_cmds++; 73 deve->total_bytes += se_cmd->data_length; 74 75 if (se_cmd->data_direction == DMA_TO_DEVICE) { 76 if (deve->lun_flags & 77 TRANSPORT_LUNFLAGS_READ_ONLY) { 78 read_only = 1; 79 goto out; 80 } 81 deve->write_bytes += se_cmd->data_length; 82 } else if (se_cmd->data_direction == 83 DMA_FROM_DEVICE) { 84 deve->read_bytes += se_cmd->data_length; 85 } 86 } 87 deve->deve_cmds++; 88 89 se_lun = se_cmd->se_lun = 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_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev; 93 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; 94 } 95 out: 96 spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); 97 98 if (!se_lun) { 99 if (read_only) { 100 se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED; 101 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 102 printk("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN" 103 " Access for 0x%08x\n", 104 CMD_TFO(se_cmd)->get_fabric_name(), 105 unpacked_lun); 106 return -1; 107 } else { 108 /* 109 * Use the se_portal_group->tpg_virt_lun0 to allow for 110 * REPORT_LUNS, et al to be returned when no active 111 * MappedLUN=0 exists for this Initiator Port. 112 */ 113 if (unpacked_lun != 0) { 114 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN; 115 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 116 printk("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" 117 " Access for 0x%08x\n", 118 CMD_TFO(se_cmd)->get_fabric_name(), 119 unpacked_lun); 120 return -1; 121 } 122 /* 123 * Force WRITE PROTECT for virtual LUN 0 124 */ 125 if ((se_cmd->data_direction != DMA_FROM_DEVICE) && 126 (se_cmd->data_direction != DMA_NONE)) { 127 se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED; 128 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 129 return -1; 130 } 131 #if 0 132 printk("TARGET_CORE[%s]: Using virtual LUN0! :-)\n", 133 CMD_TFO(se_cmd)->get_fabric_name()); 134 #endif 135 se_lun = se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0; 136 se_cmd->orig_fe_lun = 0; 137 se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev; 138 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; 139 } 140 } 141 /* 142 * Determine if the struct se_lun is online. 143 */ 144 /* #warning FIXME: Check for LUN_RESET + UNIT Attention */ 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 -1; 149 } 150 151 { 152 struct se_device *dev = se_lun->lun_se_dev; 153 spin_lock(&dev->stats_lock); 154 dev->num_cmds++; 155 if (se_cmd->data_direction == DMA_TO_DEVICE) 156 dev->write_bytes += se_cmd->data_length; 157 else if (se_cmd->data_direction == DMA_FROM_DEVICE) 158 dev->read_bytes += se_cmd->data_length; 159 spin_unlock(&dev->stats_lock); 160 } 161 162 /* 163 * Add the iscsi_cmd_t to the struct se_lun's cmd list. This list is used 164 * for tracking state of struct se_cmds during LUN shutdown events. 165 */ 166 spin_lock_irqsave(&se_lun->lun_cmd_lock, flags); 167 list_add_tail(&se_cmd->se_lun_list, &se_lun->lun_cmd_list); 168 atomic_set(&T_TASK(se_cmd)->transport_lun_active, 1); 169 #if 0 170 printk(KERN_INFO "Adding ITT: 0x%08x to LUN LIST[%d]\n", 171 CMD_TFO(se_cmd)->get_task_tag(se_cmd), se_lun->unpacked_lun); 172 #endif 173 spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags); 174 175 return 0; 176 } 177 EXPORT_SYMBOL(transport_get_lun_for_cmd); 178 179 int transport_get_lun_for_tmr( 180 struct se_cmd *se_cmd, 181 u32 unpacked_lun) 182 { 183 struct se_device *dev = NULL; 184 struct se_dev_entry *deve; 185 struct se_lun *se_lun = NULL; 186 struct se_session *se_sess = SE_SESS(se_cmd); 187 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req; 188 189 spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); 190 deve = se_cmd->se_deve = 191 &SE_NODE_ACL(se_sess)->device_list[unpacked_lun]; 192 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 193 se_lun = se_cmd->se_lun = se_tmr->tmr_lun = deve->se_lun; 194 dev = se_tmr->tmr_dev = se_lun->lun_se_dev; 195 se_cmd->pr_res_key = deve->pr_res_key; 196 se_cmd->orig_fe_lun = unpacked_lun; 197 se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev; 198 /* se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; */ 199 } 200 spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); 201 202 if (!se_lun) { 203 printk(KERN_INFO "TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" 204 " Access for 0x%08x\n", 205 CMD_TFO(se_cmd)->get_fabric_name(), 206 unpacked_lun); 207 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 208 return -1; 209 } 210 /* 211 * Determine if the struct se_lun is online. 212 */ 213 /* #warning FIXME: Check for LUN_RESET + UNIT Attention */ 214 if (se_dev_check_online(se_lun->lun_se_dev) != 0) { 215 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 216 return -1; 217 } 218 219 spin_lock(&dev->se_tmr_lock); 220 list_add_tail(&se_tmr->tmr_list, &dev->dev_tmr_list); 221 spin_unlock(&dev->se_tmr_lock); 222 223 return 0; 224 } 225 EXPORT_SYMBOL(transport_get_lun_for_tmr); 226 227 /* 228 * This function is called from core_scsi3_emulate_pro_register_and_move() 229 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count 230 * when a matching rtpi is found. 231 */ 232 struct se_dev_entry *core_get_se_deve_from_rtpi( 233 struct se_node_acl *nacl, 234 u16 rtpi) 235 { 236 struct se_dev_entry *deve; 237 struct se_lun *lun; 238 struct se_port *port; 239 struct se_portal_group *tpg = nacl->se_tpg; 240 u32 i; 241 242 spin_lock_irq(&nacl->device_list_lock); 243 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 244 deve = &nacl->device_list[i]; 245 246 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 247 continue; 248 249 lun = deve->se_lun; 250 if (!(lun)) { 251 printk(KERN_ERR "%s device entries device pointer is" 252 " NULL, but Initiator has access.\n", 253 TPG_TFO(tpg)->get_fabric_name()); 254 continue; 255 } 256 port = lun->lun_sep; 257 if (!(port)) { 258 printk(KERN_ERR "%s device entries device pointer is" 259 " NULL, but Initiator has access.\n", 260 TPG_TFO(tpg)->get_fabric_name()); 261 continue; 262 } 263 if (port->sep_rtpi != rtpi) 264 continue; 265 266 atomic_inc(&deve->pr_ref_count); 267 smp_mb__after_atomic_inc(); 268 spin_unlock_irq(&nacl->device_list_lock); 269 270 return deve; 271 } 272 spin_unlock_irq(&nacl->device_list_lock); 273 274 return NULL; 275 } 276 277 int core_free_device_list_for_node( 278 struct se_node_acl *nacl, 279 struct se_portal_group *tpg) 280 { 281 struct se_dev_entry *deve; 282 struct se_lun *lun; 283 u32 i; 284 285 if (!nacl->device_list) 286 return 0; 287 288 spin_lock_irq(&nacl->device_list_lock); 289 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 290 deve = &nacl->device_list[i]; 291 292 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 293 continue; 294 295 if (!deve->se_lun) { 296 printk(KERN_ERR "%s device entries device pointer is" 297 " NULL, but Initiator has access.\n", 298 TPG_TFO(tpg)->get_fabric_name()); 299 continue; 300 } 301 lun = deve->se_lun; 302 303 spin_unlock_irq(&nacl->device_list_lock); 304 core_update_device_list_for_node(lun, NULL, deve->mapped_lun, 305 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0); 306 spin_lock_irq(&nacl->device_list_lock); 307 } 308 spin_unlock_irq(&nacl->device_list_lock); 309 310 kfree(nacl->device_list); 311 nacl->device_list = NULL; 312 313 return 0; 314 } 315 316 void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd) 317 { 318 struct se_dev_entry *deve; 319 320 spin_lock_irq(&se_nacl->device_list_lock); 321 deve = &se_nacl->device_list[se_cmd->orig_fe_lun]; 322 deve->deve_cmds--; 323 spin_unlock_irq(&se_nacl->device_list_lock); 324 325 return; 326 } 327 328 void core_update_device_list_access( 329 u32 mapped_lun, 330 u32 lun_access, 331 struct se_node_acl *nacl) 332 { 333 struct se_dev_entry *deve; 334 335 spin_lock_irq(&nacl->device_list_lock); 336 deve = &nacl->device_list[mapped_lun]; 337 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 338 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 339 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 340 } else { 341 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 342 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 343 } 344 spin_unlock_irq(&nacl->device_list_lock); 345 346 return; 347 } 348 349 /* core_update_device_list_for_node(): 350 * 351 * 352 */ 353 int core_update_device_list_for_node( 354 struct se_lun *lun, 355 struct se_lun_acl *lun_acl, 356 u32 mapped_lun, 357 u32 lun_access, 358 struct se_node_acl *nacl, 359 struct se_portal_group *tpg, 360 int enable) 361 { 362 struct se_port *port = lun->lun_sep; 363 struct se_dev_entry *deve = &nacl->device_list[mapped_lun]; 364 int trans = 0; 365 /* 366 * If the MappedLUN entry is being disabled, the entry in 367 * port->sep_alua_list must be removed now before clearing the 368 * struct se_dev_entry pointers below as logic in 369 * core_alua_do_transition_tg_pt() depends on these being present. 370 */ 371 if (!(enable)) { 372 /* 373 * deve->se_lun_acl will be NULL for demo-mode created LUNs 374 * that have not been explictly concerted to MappedLUNs -> 375 * struct se_lun_acl, but we remove deve->alua_port_list from 376 * port->sep_alua_list. This also means that active UAs and 377 * NodeACL context specific PR metadata for demo-mode 378 * MappedLUN *deve will be released below.. 379 */ 380 spin_lock_bh(&port->sep_alua_lock); 381 list_del(&deve->alua_port_list); 382 spin_unlock_bh(&port->sep_alua_lock); 383 } 384 385 spin_lock_irq(&nacl->device_list_lock); 386 if (enable) { 387 /* 388 * Check if the call is handling demo mode -> explict LUN ACL 389 * transition. This transition must be for the same struct se_lun 390 * + mapped_lun that was setup in demo mode.. 391 */ 392 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 393 if (deve->se_lun_acl != NULL) { 394 printk(KERN_ERR "struct se_dev_entry->se_lun_acl" 395 " already set for demo mode -> explict" 396 " LUN ACL transition\n"); 397 spin_unlock_irq(&nacl->device_list_lock); 398 return -1; 399 } 400 if (deve->se_lun != lun) { 401 printk(KERN_ERR "struct se_dev_entry->se_lun does" 402 " match passed struct se_lun for demo mode" 403 " -> explict LUN ACL transition\n"); 404 spin_unlock_irq(&nacl->device_list_lock); 405 return -1; 406 } 407 deve->se_lun_acl = lun_acl; 408 trans = 1; 409 } else { 410 deve->se_lun = lun; 411 deve->se_lun_acl = lun_acl; 412 deve->mapped_lun = mapped_lun; 413 deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS; 414 } 415 416 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 417 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 418 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 419 } else { 420 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 421 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 422 } 423 424 if (trans) { 425 spin_unlock_irq(&nacl->device_list_lock); 426 return 0; 427 } 428 deve->creation_time = get_jiffies_64(); 429 deve->attach_count++; 430 spin_unlock_irq(&nacl->device_list_lock); 431 432 spin_lock_bh(&port->sep_alua_lock); 433 list_add_tail(&deve->alua_port_list, &port->sep_alua_list); 434 spin_unlock_bh(&port->sep_alua_lock); 435 436 return 0; 437 } 438 /* 439 * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE 440 * PR operation to complete. 441 */ 442 spin_unlock_irq(&nacl->device_list_lock); 443 while (atomic_read(&deve->pr_ref_count) != 0) 444 cpu_relax(); 445 spin_lock_irq(&nacl->device_list_lock); 446 /* 447 * Disable struct se_dev_entry LUN ACL mapping 448 */ 449 core_scsi3_ua_release_all(deve); 450 deve->se_lun = NULL; 451 deve->se_lun_acl = NULL; 452 deve->lun_flags = 0; 453 deve->creation_time = 0; 454 deve->attach_count--; 455 spin_unlock_irq(&nacl->device_list_lock); 456 457 core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl); 458 return 0; 459 } 460 461 /* core_clear_lun_from_tpg(): 462 * 463 * 464 */ 465 void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg) 466 { 467 struct se_node_acl *nacl; 468 struct se_dev_entry *deve; 469 u32 i; 470 471 spin_lock_bh(&tpg->acl_node_lock); 472 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) { 473 spin_unlock_bh(&tpg->acl_node_lock); 474 475 spin_lock_irq(&nacl->device_list_lock); 476 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 477 deve = &nacl->device_list[i]; 478 if (lun != deve->se_lun) 479 continue; 480 spin_unlock_irq(&nacl->device_list_lock); 481 482 core_update_device_list_for_node(lun, NULL, 483 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS, 484 nacl, tpg, 0); 485 486 spin_lock_irq(&nacl->device_list_lock); 487 } 488 spin_unlock_irq(&nacl->device_list_lock); 489 490 spin_lock_bh(&tpg->acl_node_lock); 491 } 492 spin_unlock_bh(&tpg->acl_node_lock); 493 494 return; 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 printk(KERN_ERR "Unable to allocate struct se_port\n"); 504 return NULL; 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 printk(KERN_WARNING "Reached dev->dev_port_count ==" 515 " 0x0000ffff\n"); 516 spin_unlock(&dev->se_port_lock); 517 return NULL; 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 = SU_DEV(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 (T10_ALUA(su_dev)->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 printk(KERN_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 T10_ALUA(su_dev)->default_tg_pt_gp); 578 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 579 printk(KERN_INFO "%s/%s: Adding to default ALUA Target Port" 580 " Group: alua/default_tg_pt_gp\n", 581 TRANSPORT(dev)->name, TPG_TFO(tpg)->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 { 593 /* 594 * Wait for any port reference for PR ALL_TG_PT=1 operation 595 * to complete in __core_scsi3_alloc_registration() 596 */ 597 spin_unlock(&dev->se_port_lock); 598 if (atomic_read(&port->sep_tg_pt_ref_cnt)) 599 cpu_relax(); 600 spin_lock(&dev->se_port_lock); 601 602 core_alua_free_tg_pt_gp_mem(port); 603 604 list_del(&port->sep_list); 605 dev->dev_port_count--; 606 kfree(port); 607 608 return; 609 } 610 611 int core_dev_export( 612 struct se_device *dev, 613 struct se_portal_group *tpg, 614 struct se_lun *lun) 615 { 616 struct se_port *port; 617 618 port = core_alloc_port(dev); 619 if (!(port)) 620 return -1; 621 622 lun->lun_se_dev = dev; 623 se_dev_start(dev); 624 625 atomic_inc(&dev->dev_export_obj.obj_access_count); 626 core_export_port(dev, tpg, port, lun); 627 return 0; 628 } 629 630 void core_dev_unexport( 631 struct se_device *dev, 632 struct se_portal_group *tpg, 633 struct se_lun *lun) 634 { 635 struct se_port *port = lun->lun_sep; 636 637 spin_lock(&lun->lun_sep_lock); 638 if (lun->lun_se_dev == NULL) { 639 spin_unlock(&lun->lun_sep_lock); 640 return; 641 } 642 spin_unlock(&lun->lun_sep_lock); 643 644 spin_lock(&dev->se_port_lock); 645 atomic_dec(&dev->dev_export_obj.obj_access_count); 646 core_release_port(dev, port); 647 spin_unlock(&dev->se_port_lock); 648 649 se_dev_stop(dev); 650 lun->lun_se_dev = NULL; 651 } 652 653 int transport_core_report_lun_response(struct se_cmd *se_cmd) 654 { 655 struct se_dev_entry *deve; 656 struct se_lun *se_lun; 657 struct se_session *se_sess = SE_SESS(se_cmd); 658 struct se_task *se_task; 659 unsigned char *buf = (unsigned char *)T_TASK(se_cmd)->t_task_buf; 660 u32 cdb_offset = 0, lun_count = 0, offset = 8; 661 u64 i, lun; 662 663 list_for_each_entry(se_task, &T_TASK(se_cmd)->t_task_list, t_list) 664 break; 665 666 if (!(se_task)) { 667 printk(KERN_ERR "Unable to locate struct se_task for struct se_cmd\n"); 668 return PYX_TRANSPORT_LU_COMM_FAILURE; 669 } 670 671 /* 672 * If no struct se_session pointer is present, this struct se_cmd is 673 * coming via a target_core_mod PASSTHROUGH op, and not through 674 * a $FABRIC_MOD. In that case, report LUN=0 only. 675 */ 676 if (!(se_sess)) { 677 lun = 0; 678 buf[offset++] = ((lun >> 56) & 0xff); 679 buf[offset++] = ((lun >> 48) & 0xff); 680 buf[offset++] = ((lun >> 40) & 0xff); 681 buf[offset++] = ((lun >> 32) & 0xff); 682 buf[offset++] = ((lun >> 24) & 0xff); 683 buf[offset++] = ((lun >> 16) & 0xff); 684 buf[offset++] = ((lun >> 8) & 0xff); 685 buf[offset++] = (lun & 0xff); 686 lun_count = 1; 687 goto done; 688 } 689 690 spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); 691 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 692 deve = &SE_NODE_ACL(se_sess)->device_list[i]; 693 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 694 continue; 695 se_lun = deve->se_lun; 696 /* 697 * We determine the correct LUN LIST LENGTH even once we 698 * have reached the initial allocation length. 699 * See SPC2-R20 7.19. 700 */ 701 lun_count++; 702 if ((cdb_offset + 8) >= se_cmd->data_length) 703 continue; 704 705 lun = cpu_to_be64(CMD_TFO(se_cmd)->pack_lun(deve->mapped_lun)); 706 buf[offset++] = ((lun >> 56) & 0xff); 707 buf[offset++] = ((lun >> 48) & 0xff); 708 buf[offset++] = ((lun >> 40) & 0xff); 709 buf[offset++] = ((lun >> 32) & 0xff); 710 buf[offset++] = ((lun >> 24) & 0xff); 711 buf[offset++] = ((lun >> 16) & 0xff); 712 buf[offset++] = ((lun >> 8) & 0xff); 713 buf[offset++] = (lun & 0xff); 714 cdb_offset += 8; 715 } 716 spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); 717 718 /* 719 * See SPC3 r07, page 159. 720 */ 721 done: 722 lun_count *= 8; 723 buf[0] = ((lun_count >> 24) & 0xff); 724 buf[1] = ((lun_count >> 16) & 0xff); 725 buf[2] = ((lun_count >> 8) & 0xff); 726 buf[3] = (lun_count & 0xff); 727 728 return PYX_TRANSPORT_SENT_TO_TRANSPORT; 729 } 730 731 /* se_release_device_for_hba(): 732 * 733 * 734 */ 735 void se_release_device_for_hba(struct se_device *dev) 736 { 737 struct se_hba *hba = dev->se_hba; 738 739 if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) || 740 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) || 741 (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) || 742 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) || 743 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED)) 744 se_dev_stop(dev); 745 746 if (dev->dev_ptr) { 747 kthread_stop(dev->process_thread); 748 if (dev->transport->free_device) 749 dev->transport->free_device(dev->dev_ptr); 750 } 751 752 spin_lock(&hba->device_lock); 753 list_del(&dev->dev_list); 754 hba->dev_count--; 755 spin_unlock(&hba->device_lock); 756 757 core_scsi3_free_all_registrations(dev); 758 se_release_vpd_for_dev(dev); 759 760 kfree(dev->dev_status_queue_obj); 761 kfree(dev->dev_queue_obj); 762 kfree(dev); 763 764 return; 765 } 766 767 void se_release_vpd_for_dev(struct se_device *dev) 768 { 769 struct t10_vpd *vpd, *vpd_tmp; 770 771 spin_lock(&DEV_T10_WWN(dev)->t10_vpd_lock); 772 list_for_each_entry_safe(vpd, vpd_tmp, 773 &DEV_T10_WWN(dev)->t10_vpd_list, vpd_list) { 774 list_del(&vpd->vpd_list); 775 kfree(vpd); 776 } 777 spin_unlock(&DEV_T10_WWN(dev)->t10_vpd_lock); 778 779 return; 780 } 781 782 /* 783 * Called with struct se_hba->device_lock held. 784 */ 785 void se_clear_dev_ports(struct se_device *dev) 786 { 787 struct se_hba *hba = dev->se_hba; 788 struct se_lun *lun; 789 struct se_portal_group *tpg; 790 struct se_port *sep, *sep_tmp; 791 792 spin_lock(&dev->se_port_lock); 793 list_for_each_entry_safe(sep, sep_tmp, &dev->dev_sep_list, sep_list) { 794 spin_unlock(&dev->se_port_lock); 795 spin_unlock(&hba->device_lock); 796 797 lun = sep->sep_lun; 798 tpg = sep->sep_tpg; 799 spin_lock(&lun->lun_sep_lock); 800 if (lun->lun_se_dev == NULL) { 801 spin_unlock(&lun->lun_sep_lock); 802 continue; 803 } 804 spin_unlock(&lun->lun_sep_lock); 805 806 core_dev_del_lun(tpg, lun->unpacked_lun); 807 808 spin_lock(&hba->device_lock); 809 spin_lock(&dev->se_port_lock); 810 } 811 spin_unlock(&dev->se_port_lock); 812 813 return; 814 } 815 816 /* se_free_virtual_device(): 817 * 818 * Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers. 819 */ 820 int se_free_virtual_device(struct se_device *dev, struct se_hba *hba) 821 { 822 spin_lock(&hba->device_lock); 823 se_clear_dev_ports(dev); 824 spin_unlock(&hba->device_lock); 825 826 core_alua_free_lu_gp_mem(dev); 827 se_release_device_for_hba(dev); 828 829 return 0; 830 } 831 832 static void se_dev_start(struct se_device *dev) 833 { 834 struct se_hba *hba = dev->se_hba; 835 836 spin_lock(&hba->device_lock); 837 atomic_inc(&dev->dev_obj.obj_access_count); 838 if (atomic_read(&dev->dev_obj.obj_access_count) == 1) { 839 if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) { 840 dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED; 841 dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED; 842 } else if (dev->dev_status & 843 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) { 844 dev->dev_status &= 845 ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED; 846 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED; 847 } 848 } 849 spin_unlock(&hba->device_lock); 850 } 851 852 static void se_dev_stop(struct se_device *dev) 853 { 854 struct se_hba *hba = dev->se_hba; 855 856 spin_lock(&hba->device_lock); 857 atomic_dec(&dev->dev_obj.obj_access_count); 858 if (atomic_read(&dev->dev_obj.obj_access_count) == 0) { 859 if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) { 860 dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED; 861 dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED; 862 } else if (dev->dev_status & 863 TRANSPORT_DEVICE_OFFLINE_ACTIVATED) { 864 dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED; 865 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED; 866 } 867 } 868 spin_unlock(&hba->device_lock); 869 } 870 871 int se_dev_check_online(struct se_device *dev) 872 { 873 int ret; 874 875 spin_lock_irq(&dev->dev_status_lock); 876 ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) || 877 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1; 878 spin_unlock_irq(&dev->dev_status_lock); 879 880 return ret; 881 } 882 883 int se_dev_check_shutdown(struct se_device *dev) 884 { 885 int ret; 886 887 spin_lock_irq(&dev->dev_status_lock); 888 ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN); 889 spin_unlock_irq(&dev->dev_status_lock); 890 891 return ret; 892 } 893 894 void se_dev_set_default_attribs( 895 struct se_device *dev, 896 struct se_dev_limits *dev_limits) 897 { 898 struct queue_limits *limits = &dev_limits->limits; 899 900 DEV_ATTRIB(dev)->emulate_dpo = DA_EMULATE_DPO; 901 DEV_ATTRIB(dev)->emulate_fua_write = DA_EMULATE_FUA_WRITE; 902 DEV_ATTRIB(dev)->emulate_fua_read = DA_EMULATE_FUA_READ; 903 DEV_ATTRIB(dev)->emulate_write_cache = DA_EMULATE_WRITE_CACHE; 904 DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL; 905 DEV_ATTRIB(dev)->emulate_tas = DA_EMULATE_TAS; 906 DEV_ATTRIB(dev)->emulate_tpu = DA_EMULATE_TPU; 907 DEV_ATTRIB(dev)->emulate_tpws = DA_EMULATE_TPWS; 908 DEV_ATTRIB(dev)->emulate_reservations = DA_EMULATE_RESERVATIONS; 909 DEV_ATTRIB(dev)->emulate_alua = DA_EMULATE_ALUA; 910 DEV_ATTRIB(dev)->enforce_pr_isids = DA_ENFORCE_PR_ISIDS; 911 /* 912 * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK 913 * iblock_create_virtdevice() from struct queue_limits values 914 * if blk_queue_discard()==1 915 */ 916 DEV_ATTRIB(dev)->max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT; 917 DEV_ATTRIB(dev)->max_unmap_block_desc_count = 918 DA_MAX_UNMAP_BLOCK_DESC_COUNT; 919 DEV_ATTRIB(dev)->unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT; 920 DEV_ATTRIB(dev)->unmap_granularity_alignment = 921 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT; 922 /* 923 * block_size is based on subsystem plugin dependent requirements. 924 */ 925 DEV_ATTRIB(dev)->hw_block_size = limits->logical_block_size; 926 DEV_ATTRIB(dev)->block_size = limits->logical_block_size; 927 /* 928 * max_sectors is based on subsystem plugin dependent requirements. 929 */ 930 DEV_ATTRIB(dev)->hw_max_sectors = limits->max_hw_sectors; 931 DEV_ATTRIB(dev)->max_sectors = limits->max_sectors; 932 /* 933 * Set optimal_sectors from max_sectors, which can be lowered via 934 * configfs. 935 */ 936 DEV_ATTRIB(dev)->optimal_sectors = limits->max_sectors; 937 /* 938 * queue_depth is based on subsystem plugin dependent requirements. 939 */ 940 DEV_ATTRIB(dev)->hw_queue_depth = dev_limits->hw_queue_depth; 941 DEV_ATTRIB(dev)->queue_depth = dev_limits->queue_depth; 942 } 943 944 int se_dev_set_task_timeout(struct se_device *dev, u32 task_timeout) 945 { 946 if (task_timeout > DA_TASK_TIMEOUT_MAX) { 947 printk(KERN_ERR "dev[%p]: Passed task_timeout: %u larger then" 948 " DA_TASK_TIMEOUT_MAX\n", dev, task_timeout); 949 return -1; 950 } else { 951 DEV_ATTRIB(dev)->task_timeout = task_timeout; 952 printk(KERN_INFO "dev[%p]: Set SE Device task_timeout: %u\n", 953 dev, task_timeout); 954 } 955 956 return 0; 957 } 958 959 int se_dev_set_max_unmap_lba_count( 960 struct se_device *dev, 961 u32 max_unmap_lba_count) 962 { 963 DEV_ATTRIB(dev)->max_unmap_lba_count = max_unmap_lba_count; 964 printk(KERN_INFO "dev[%p]: Set max_unmap_lba_count: %u\n", 965 dev, DEV_ATTRIB(dev)->max_unmap_lba_count); 966 return 0; 967 } 968 969 int se_dev_set_max_unmap_block_desc_count( 970 struct se_device *dev, 971 u32 max_unmap_block_desc_count) 972 { 973 DEV_ATTRIB(dev)->max_unmap_block_desc_count = max_unmap_block_desc_count; 974 printk(KERN_INFO "dev[%p]: Set max_unmap_block_desc_count: %u\n", 975 dev, DEV_ATTRIB(dev)->max_unmap_block_desc_count); 976 return 0; 977 } 978 979 int se_dev_set_unmap_granularity( 980 struct se_device *dev, 981 u32 unmap_granularity) 982 { 983 DEV_ATTRIB(dev)->unmap_granularity = unmap_granularity; 984 printk(KERN_INFO "dev[%p]: Set unmap_granularity: %u\n", 985 dev, DEV_ATTRIB(dev)->unmap_granularity); 986 return 0; 987 } 988 989 int se_dev_set_unmap_granularity_alignment( 990 struct se_device *dev, 991 u32 unmap_granularity_alignment) 992 { 993 DEV_ATTRIB(dev)->unmap_granularity_alignment = unmap_granularity_alignment; 994 printk(KERN_INFO "dev[%p]: Set unmap_granularity_alignment: %u\n", 995 dev, DEV_ATTRIB(dev)->unmap_granularity_alignment); 996 return 0; 997 } 998 999 int se_dev_set_emulate_dpo(struct se_device *dev, int flag) 1000 { 1001 if ((flag != 0) && (flag != 1)) { 1002 printk(KERN_ERR "Illegal value %d\n", flag); 1003 return -1; 1004 } 1005 if (TRANSPORT(dev)->dpo_emulated == NULL) { 1006 printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated is NULL\n"); 1007 return -1; 1008 } 1009 if (TRANSPORT(dev)->dpo_emulated(dev) == 0) { 1010 printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated not supported\n"); 1011 return -1; 1012 } 1013 DEV_ATTRIB(dev)->emulate_dpo = flag; 1014 printk(KERN_INFO "dev[%p]: SE Device Page Out (DPO) Emulation" 1015 " bit: %d\n", dev, DEV_ATTRIB(dev)->emulate_dpo); 1016 return 0; 1017 } 1018 1019 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag) 1020 { 1021 if ((flag != 0) && (flag != 1)) { 1022 printk(KERN_ERR "Illegal value %d\n", flag); 1023 return -1; 1024 } 1025 if (TRANSPORT(dev)->fua_write_emulated == NULL) { 1026 printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated is NULL\n"); 1027 return -1; 1028 } 1029 if (TRANSPORT(dev)->fua_write_emulated(dev) == 0) { 1030 printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated not supported\n"); 1031 return -1; 1032 } 1033 DEV_ATTRIB(dev)->emulate_fua_write = flag; 1034 printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access WRITEs: %d\n", 1035 dev, DEV_ATTRIB(dev)->emulate_fua_write); 1036 return 0; 1037 } 1038 1039 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag) 1040 { 1041 if ((flag != 0) && (flag != 1)) { 1042 printk(KERN_ERR "Illegal value %d\n", flag); 1043 return -1; 1044 } 1045 if (TRANSPORT(dev)->fua_read_emulated == NULL) { 1046 printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated is NULL\n"); 1047 return -1; 1048 } 1049 if (TRANSPORT(dev)->fua_read_emulated(dev) == 0) { 1050 printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated not supported\n"); 1051 return -1; 1052 } 1053 DEV_ATTRIB(dev)->emulate_fua_read = flag; 1054 printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access READs: %d\n", 1055 dev, DEV_ATTRIB(dev)->emulate_fua_read); 1056 return 0; 1057 } 1058 1059 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag) 1060 { 1061 if ((flag != 0) && (flag != 1)) { 1062 printk(KERN_ERR "Illegal value %d\n", flag); 1063 return -1; 1064 } 1065 if (TRANSPORT(dev)->write_cache_emulated == NULL) { 1066 printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated is NULL\n"); 1067 return -1; 1068 } 1069 if (TRANSPORT(dev)->write_cache_emulated(dev) == 0) { 1070 printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated not supported\n"); 1071 return -1; 1072 } 1073 DEV_ATTRIB(dev)->emulate_write_cache = flag; 1074 printk(KERN_INFO "dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 1075 dev, DEV_ATTRIB(dev)->emulate_write_cache); 1076 return 0; 1077 } 1078 1079 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag) 1080 { 1081 if ((flag != 0) && (flag != 1) && (flag != 2)) { 1082 printk(KERN_ERR "Illegal value %d\n", flag); 1083 return -1; 1084 } 1085 1086 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1087 printk(KERN_ERR "dev[%p]: Unable to change SE Device" 1088 " UA_INTRLCK_CTRL while dev_export_obj: %d count" 1089 " exists\n", dev, 1090 atomic_read(&dev->dev_export_obj.obj_access_count)); 1091 return -1; 1092 } 1093 DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = flag; 1094 printk(KERN_INFO "dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 1095 dev, DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl); 1096 1097 return 0; 1098 } 1099 1100 int se_dev_set_emulate_tas(struct se_device *dev, int flag) 1101 { 1102 if ((flag != 0) && (flag != 1)) { 1103 printk(KERN_ERR "Illegal value %d\n", flag); 1104 return -1; 1105 } 1106 1107 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1108 printk(KERN_ERR "dev[%p]: Unable to change SE Device TAS while" 1109 " dev_export_obj: %d count exists\n", dev, 1110 atomic_read(&dev->dev_export_obj.obj_access_count)); 1111 return -1; 1112 } 1113 DEV_ATTRIB(dev)->emulate_tas = flag; 1114 printk(KERN_INFO "dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 1115 dev, (DEV_ATTRIB(dev)->emulate_tas) ? "Enabled" : "Disabled"); 1116 1117 return 0; 1118 } 1119 1120 int se_dev_set_emulate_tpu(struct se_device *dev, int flag) 1121 { 1122 if ((flag != 0) && (flag != 1)) { 1123 printk(KERN_ERR "Illegal value %d\n", flag); 1124 return -1; 1125 } 1126 /* 1127 * We expect this value to be non-zero when generic Block Layer 1128 * Discard supported is detected iblock_create_virtdevice(). 1129 */ 1130 if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) { 1131 printk(KERN_ERR "Generic Block Discard not supported\n"); 1132 return -ENOSYS; 1133 } 1134 1135 DEV_ATTRIB(dev)->emulate_tpu = flag; 1136 printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 1137 dev, flag); 1138 return 0; 1139 } 1140 1141 int se_dev_set_emulate_tpws(struct se_device *dev, int flag) 1142 { 1143 if ((flag != 0) && (flag != 1)) { 1144 printk(KERN_ERR "Illegal value %d\n", flag); 1145 return -1; 1146 } 1147 /* 1148 * We expect this value to be non-zero when generic Block Layer 1149 * Discard supported is detected iblock_create_virtdevice(). 1150 */ 1151 if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) { 1152 printk(KERN_ERR "Generic Block Discard not supported\n"); 1153 return -ENOSYS; 1154 } 1155 1156 DEV_ATTRIB(dev)->emulate_tpws = flag; 1157 printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 1158 dev, flag); 1159 return 0; 1160 } 1161 1162 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag) 1163 { 1164 if ((flag != 0) && (flag != 1)) { 1165 printk(KERN_ERR "Illegal value %d\n", flag); 1166 return -1; 1167 } 1168 DEV_ATTRIB(dev)->enforce_pr_isids = flag; 1169 printk(KERN_INFO "dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev, 1170 (DEV_ATTRIB(dev)->enforce_pr_isids) ? "Enabled" : "Disabled"); 1171 return 0; 1172 } 1173 1174 /* 1175 * Note, this can only be called on unexported SE Device Object. 1176 */ 1177 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth) 1178 { 1179 u32 orig_queue_depth = dev->queue_depth; 1180 1181 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1182 printk(KERN_ERR "dev[%p]: Unable to change SE Device TCQ while" 1183 " dev_export_obj: %d count exists\n", dev, 1184 atomic_read(&dev->dev_export_obj.obj_access_count)); 1185 return -1; 1186 } 1187 if (!(queue_depth)) { 1188 printk(KERN_ERR "dev[%p]: Illegal ZERO value for queue" 1189 "_depth\n", dev); 1190 return -1; 1191 } 1192 1193 if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1194 if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) { 1195 printk(KERN_ERR "dev[%p]: Passed queue_depth: %u" 1196 " exceeds TCM/SE_Device TCQ: %u\n", 1197 dev, queue_depth, 1198 DEV_ATTRIB(dev)->hw_queue_depth); 1199 return -1; 1200 } 1201 } else { 1202 if (queue_depth > DEV_ATTRIB(dev)->queue_depth) { 1203 if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) { 1204 printk(KERN_ERR "dev[%p]: Passed queue_depth:" 1205 " %u exceeds TCM/SE_Device MAX" 1206 " TCQ: %u\n", dev, queue_depth, 1207 DEV_ATTRIB(dev)->hw_queue_depth); 1208 return -1; 1209 } 1210 } 1211 } 1212 1213 DEV_ATTRIB(dev)->queue_depth = dev->queue_depth = queue_depth; 1214 if (queue_depth > orig_queue_depth) 1215 atomic_add(queue_depth - orig_queue_depth, &dev->depth_left); 1216 else if (queue_depth < orig_queue_depth) 1217 atomic_sub(orig_queue_depth - queue_depth, &dev->depth_left); 1218 1219 printk(KERN_INFO "dev[%p]: SE Device TCQ Depth changed to: %u\n", 1220 dev, queue_depth); 1221 return 0; 1222 } 1223 1224 int se_dev_set_max_sectors(struct se_device *dev, u32 max_sectors) 1225 { 1226 int force = 0; /* Force setting for VDEVS */ 1227 1228 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1229 printk(KERN_ERR "dev[%p]: Unable to change SE Device" 1230 " max_sectors while dev_export_obj: %d count exists\n", 1231 dev, atomic_read(&dev->dev_export_obj.obj_access_count)); 1232 return -1; 1233 } 1234 if (!(max_sectors)) { 1235 printk(KERN_ERR "dev[%p]: Illegal ZERO value for" 1236 " max_sectors\n", dev); 1237 return -1; 1238 } 1239 if (max_sectors < DA_STATUS_MAX_SECTORS_MIN) { 1240 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u less than" 1241 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, max_sectors, 1242 DA_STATUS_MAX_SECTORS_MIN); 1243 return -1; 1244 } 1245 if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1246 if (max_sectors > DEV_ATTRIB(dev)->hw_max_sectors) { 1247 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u" 1248 " greater than TCM/SE_Device max_sectors:" 1249 " %u\n", dev, max_sectors, 1250 DEV_ATTRIB(dev)->hw_max_sectors); 1251 return -1; 1252 } 1253 } else { 1254 if (!(force) && (max_sectors > 1255 DEV_ATTRIB(dev)->hw_max_sectors)) { 1256 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u" 1257 " greater than TCM/SE_Device max_sectors" 1258 ": %u, use force=1 to override.\n", dev, 1259 max_sectors, DEV_ATTRIB(dev)->hw_max_sectors); 1260 return -1; 1261 } 1262 if (max_sectors > DA_STATUS_MAX_SECTORS_MAX) { 1263 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u" 1264 " greater than DA_STATUS_MAX_SECTORS_MAX:" 1265 " %u\n", dev, max_sectors, 1266 DA_STATUS_MAX_SECTORS_MAX); 1267 return -1; 1268 } 1269 } 1270 1271 DEV_ATTRIB(dev)->max_sectors = max_sectors; 1272 printk("dev[%p]: SE Device max_sectors changed to %u\n", 1273 dev, max_sectors); 1274 return 0; 1275 } 1276 1277 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors) 1278 { 1279 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1280 printk(KERN_ERR "dev[%p]: Unable to change SE Device" 1281 " optimal_sectors while dev_export_obj: %d count exists\n", 1282 dev, atomic_read(&dev->dev_export_obj.obj_access_count)); 1283 return -EINVAL; 1284 } 1285 if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1286 printk(KERN_ERR "dev[%p]: Passed optimal_sectors cannot be" 1287 " changed for TCM/pSCSI\n", dev); 1288 return -EINVAL; 1289 } 1290 if (optimal_sectors > DEV_ATTRIB(dev)->max_sectors) { 1291 printk(KERN_ERR "dev[%p]: Passed optimal_sectors %u cannot be" 1292 " greater than max_sectors: %u\n", dev, 1293 optimal_sectors, DEV_ATTRIB(dev)->max_sectors); 1294 return -EINVAL; 1295 } 1296 1297 DEV_ATTRIB(dev)->optimal_sectors = optimal_sectors; 1298 printk(KERN_INFO "dev[%p]: SE Device optimal_sectors changed to %u\n", 1299 dev, optimal_sectors); 1300 return 0; 1301 } 1302 1303 int se_dev_set_block_size(struct se_device *dev, u32 block_size) 1304 { 1305 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1306 printk(KERN_ERR "dev[%p]: Unable to change SE Device block_size" 1307 " while dev_export_obj: %d count exists\n", dev, 1308 atomic_read(&dev->dev_export_obj.obj_access_count)); 1309 return -1; 1310 } 1311 1312 if ((block_size != 512) && 1313 (block_size != 1024) && 1314 (block_size != 2048) && 1315 (block_size != 4096)) { 1316 printk(KERN_ERR "dev[%p]: Illegal value for block_device: %u" 1317 " for SE device, must be 512, 1024, 2048 or 4096\n", 1318 dev, block_size); 1319 return -1; 1320 } 1321 1322 if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1323 printk(KERN_ERR "dev[%p]: Not allowed to change block_size for" 1324 " Physical Device, use for Linux/SCSI to change" 1325 " block_size for underlying hardware\n", dev); 1326 return -1; 1327 } 1328 1329 DEV_ATTRIB(dev)->block_size = block_size; 1330 printk(KERN_INFO "dev[%p]: SE Device block_size changed to %u\n", 1331 dev, block_size); 1332 return 0; 1333 } 1334 1335 struct se_lun *core_dev_add_lun( 1336 struct se_portal_group *tpg, 1337 struct se_hba *hba, 1338 struct se_device *dev, 1339 u32 lun) 1340 { 1341 struct se_lun *lun_p; 1342 u32 lun_access = 0; 1343 1344 if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) { 1345 printk(KERN_ERR "Unable to export struct se_device while dev_access_obj: %d\n", 1346 atomic_read(&dev->dev_access_obj.obj_access_count)); 1347 return NULL; 1348 } 1349 1350 lun_p = core_tpg_pre_addlun(tpg, lun); 1351 if ((IS_ERR(lun_p)) || !(lun_p)) 1352 return NULL; 1353 1354 if (dev->dev_flags & DF_READ_ONLY) 1355 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; 1356 else 1357 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE; 1358 1359 if (core_tpg_post_addlun(tpg, lun_p, lun_access, dev) < 0) 1360 return NULL; 1361 1362 printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from" 1363 " CORE HBA: %u\n", TPG_TFO(tpg)->get_fabric_name(), 1364 TPG_TFO(tpg)->tpg_get_tag(tpg), lun_p->unpacked_lun, 1365 TPG_TFO(tpg)->get_fabric_name(), hba->hba_id); 1366 /* 1367 * Update LUN maps for dynamically added initiators when 1368 * generate_node_acl is enabled. 1369 */ 1370 if (TPG_TFO(tpg)->tpg_check_demo_mode(tpg)) { 1371 struct se_node_acl *acl; 1372 spin_lock_bh(&tpg->acl_node_lock); 1373 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { 1374 if (acl->dynamic_node_acl) { 1375 spin_unlock_bh(&tpg->acl_node_lock); 1376 core_tpg_add_node_to_devs(acl, tpg); 1377 spin_lock_bh(&tpg->acl_node_lock); 1378 } 1379 } 1380 spin_unlock_bh(&tpg->acl_node_lock); 1381 } 1382 1383 return lun_p; 1384 } 1385 1386 /* core_dev_del_lun(): 1387 * 1388 * 1389 */ 1390 int core_dev_del_lun( 1391 struct se_portal_group *tpg, 1392 u32 unpacked_lun) 1393 { 1394 struct se_lun *lun; 1395 int ret = 0; 1396 1397 lun = core_tpg_pre_dellun(tpg, unpacked_lun, &ret); 1398 if (!(lun)) 1399 return ret; 1400 1401 core_tpg_post_dellun(tpg, lun); 1402 1403 printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from" 1404 " device object\n", TPG_TFO(tpg)->get_fabric_name(), 1405 TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun, 1406 TPG_TFO(tpg)->get_fabric_name()); 1407 1408 return 0; 1409 } 1410 1411 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun) 1412 { 1413 struct se_lun *lun; 1414 1415 spin_lock(&tpg->tpg_lun_lock); 1416 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1417 printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS" 1418 "_PER_TPG-1: %u for Target Portal Group: %hu\n", 1419 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, 1420 TRANSPORT_MAX_LUNS_PER_TPG-1, 1421 TPG_TFO(tpg)->tpg_get_tag(tpg)); 1422 spin_unlock(&tpg->tpg_lun_lock); 1423 return NULL; 1424 } 1425 lun = &tpg->tpg_lun_list[unpacked_lun]; 1426 1427 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) { 1428 printk(KERN_ERR "%s Logical Unit Number: %u is not free on" 1429 " Target Portal Group: %hu, ignoring request.\n", 1430 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, 1431 TPG_TFO(tpg)->tpg_get_tag(tpg)); 1432 spin_unlock(&tpg->tpg_lun_lock); 1433 return NULL; 1434 } 1435 spin_unlock(&tpg->tpg_lun_lock); 1436 1437 return lun; 1438 } 1439 1440 /* core_dev_get_lun(): 1441 * 1442 * 1443 */ 1444 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun) 1445 { 1446 struct se_lun *lun; 1447 1448 spin_lock(&tpg->tpg_lun_lock); 1449 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1450 printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER" 1451 "_TPG-1: %u for Target Portal Group: %hu\n", 1452 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, 1453 TRANSPORT_MAX_LUNS_PER_TPG-1, 1454 TPG_TFO(tpg)->tpg_get_tag(tpg)); 1455 spin_unlock(&tpg->tpg_lun_lock); 1456 return NULL; 1457 } 1458 lun = &tpg->tpg_lun_list[unpacked_lun]; 1459 1460 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { 1461 printk(KERN_ERR "%s Logical Unit Number: %u is not active on" 1462 " Target Portal Group: %hu, ignoring request.\n", 1463 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, 1464 TPG_TFO(tpg)->tpg_get_tag(tpg)); 1465 spin_unlock(&tpg->tpg_lun_lock); 1466 return NULL; 1467 } 1468 spin_unlock(&tpg->tpg_lun_lock); 1469 1470 return lun; 1471 } 1472 1473 struct se_lun_acl *core_dev_init_initiator_node_lun_acl( 1474 struct se_portal_group *tpg, 1475 u32 mapped_lun, 1476 char *initiatorname, 1477 int *ret) 1478 { 1479 struct se_lun_acl *lacl; 1480 struct se_node_acl *nacl; 1481 1482 if (strlen(initiatorname) > TRANSPORT_IQN_LEN) { 1483 printk(KERN_ERR "%s InitiatorName exceeds maximum size.\n", 1484 TPG_TFO(tpg)->get_fabric_name()); 1485 *ret = -EOVERFLOW; 1486 return NULL; 1487 } 1488 nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname); 1489 if (!(nacl)) { 1490 *ret = -EINVAL; 1491 return NULL; 1492 } 1493 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL); 1494 if (!(lacl)) { 1495 printk(KERN_ERR "Unable to allocate memory for struct se_lun_acl.\n"); 1496 *ret = -ENOMEM; 1497 return NULL; 1498 } 1499 1500 INIT_LIST_HEAD(&lacl->lacl_list); 1501 lacl->mapped_lun = mapped_lun; 1502 lacl->se_lun_nacl = nacl; 1503 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); 1504 1505 return lacl; 1506 } 1507 1508 int core_dev_add_initiator_node_lun_acl( 1509 struct se_portal_group *tpg, 1510 struct se_lun_acl *lacl, 1511 u32 unpacked_lun, 1512 u32 lun_access) 1513 { 1514 struct se_lun *lun; 1515 struct se_node_acl *nacl; 1516 1517 lun = core_dev_get_lun(tpg, unpacked_lun); 1518 if (!(lun)) { 1519 printk(KERN_ERR "%s Logical Unit Number: %u is not active on" 1520 " Target Portal Group: %hu, ignoring request.\n", 1521 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, 1522 TPG_TFO(tpg)->tpg_get_tag(tpg)); 1523 return -EINVAL; 1524 } 1525 1526 nacl = lacl->se_lun_nacl; 1527 if (!(nacl)) 1528 return -EINVAL; 1529 1530 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) && 1531 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE)) 1532 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; 1533 1534 lacl->se_lun = lun; 1535 1536 if (core_update_device_list_for_node(lun, lacl, lacl->mapped_lun, 1537 lun_access, nacl, tpg, 1) < 0) 1538 return -EINVAL; 1539 1540 spin_lock(&lun->lun_acl_lock); 1541 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list); 1542 atomic_inc(&lun->lun_acl_count); 1543 smp_mb__after_atomic_inc(); 1544 spin_unlock(&lun->lun_acl_lock); 1545 1546 printk(KERN_INFO "%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for " 1547 " InitiatorNode: %s\n", TPG_TFO(tpg)->get_fabric_name(), 1548 TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun, 1549 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO", 1550 lacl->initiatorname); 1551 /* 1552 * Check to see if there are any existing persistent reservation APTPL 1553 * pre-registrations that need to be enabled for this LUN ACL.. 1554 */ 1555 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl); 1556 return 0; 1557 } 1558 1559 /* core_dev_del_initiator_node_lun_acl(): 1560 * 1561 * 1562 */ 1563 int core_dev_del_initiator_node_lun_acl( 1564 struct se_portal_group *tpg, 1565 struct se_lun *lun, 1566 struct se_lun_acl *lacl) 1567 { 1568 struct se_node_acl *nacl; 1569 1570 nacl = lacl->se_lun_nacl; 1571 if (!(nacl)) 1572 return -EINVAL; 1573 1574 spin_lock(&lun->lun_acl_lock); 1575 list_del(&lacl->lacl_list); 1576 atomic_dec(&lun->lun_acl_count); 1577 smp_mb__after_atomic_dec(); 1578 spin_unlock(&lun->lun_acl_lock); 1579 1580 core_update_device_list_for_node(lun, NULL, lacl->mapped_lun, 1581 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0); 1582 1583 lacl->se_lun = NULL; 1584 1585 printk(KERN_INFO "%s_TPG[%hu]_LUN[%u] - Removed ACL for" 1586 " InitiatorNode: %s Mapped LUN: %u\n", 1587 TPG_TFO(tpg)->get_fabric_name(), 1588 TPG_TFO(tpg)->tpg_get_tag(tpg), lun->unpacked_lun, 1589 lacl->initiatorname, lacl->mapped_lun); 1590 1591 return 0; 1592 } 1593 1594 void core_dev_free_initiator_node_lun_acl( 1595 struct se_portal_group *tpg, 1596 struct se_lun_acl *lacl) 1597 { 1598 printk("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s" 1599 " Mapped LUN: %u\n", TPG_TFO(tpg)->get_fabric_name(), 1600 TPG_TFO(tpg)->tpg_get_tag(tpg), 1601 TPG_TFO(tpg)->get_fabric_name(), 1602 lacl->initiatorname, lacl->mapped_lun); 1603 1604 kfree(lacl); 1605 } 1606 1607 int core_dev_setup_virtual_lun0(void) 1608 { 1609 struct se_hba *hba; 1610 struct se_device *dev; 1611 struct se_subsystem_dev *se_dev = NULL; 1612 struct se_subsystem_api *t; 1613 char buf[16]; 1614 int ret; 1615 1616 hba = core_alloc_hba("rd_dr", 0, HBA_FLAGS_INTERNAL_USE); 1617 if (IS_ERR(hba)) 1618 return PTR_ERR(hba); 1619 1620 se_global->g_lun0_hba = hba; 1621 t = hba->transport; 1622 1623 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL); 1624 if (!(se_dev)) { 1625 printk(KERN_ERR "Unable to allocate memory for" 1626 " struct se_subsystem_dev\n"); 1627 ret = -ENOMEM; 1628 goto out; 1629 } 1630 INIT_LIST_HEAD(&se_dev->g_se_dev_list); 1631 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list); 1632 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock); 1633 INIT_LIST_HEAD(&se_dev->t10_reservation.registration_list); 1634 INIT_LIST_HEAD(&se_dev->t10_reservation.aptpl_reg_list); 1635 spin_lock_init(&se_dev->t10_reservation.registration_lock); 1636 spin_lock_init(&se_dev->t10_reservation.aptpl_reg_lock); 1637 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list); 1638 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock); 1639 spin_lock_init(&se_dev->se_dev_lock); 1640 se_dev->t10_reservation.pr_aptpl_buf_len = PR_APTPL_BUF_LEN; 1641 se_dev->t10_wwn.t10_sub_dev = se_dev; 1642 se_dev->t10_alua.t10_sub_dev = se_dev; 1643 se_dev->se_dev_attrib.da_sub_dev = se_dev; 1644 se_dev->se_dev_hba = hba; 1645 1646 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0"); 1647 if (!(se_dev->se_dev_su_ptr)) { 1648 printk(KERN_ERR "Unable to locate subsystem dependent pointer" 1649 " from allocate_virtdevice()\n"); 1650 ret = -ENOMEM; 1651 goto out; 1652 } 1653 se_global->g_lun0_su_dev = se_dev; 1654 1655 memset(buf, 0, 16); 1656 sprintf(buf, "rd_pages=8"); 1657 t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf)); 1658 1659 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr); 1660 if (!(dev) || IS_ERR(dev)) { 1661 ret = -ENOMEM; 1662 goto out; 1663 } 1664 se_dev->se_dev_ptr = dev; 1665 se_global->g_lun0_dev = dev; 1666 1667 return 0; 1668 out: 1669 se_global->g_lun0_su_dev = NULL; 1670 kfree(se_dev); 1671 if (se_global->g_lun0_hba) { 1672 core_delete_hba(se_global->g_lun0_hba); 1673 se_global->g_lun0_hba = NULL; 1674 } 1675 return ret; 1676 } 1677 1678 1679 void core_dev_release_virtual_lun0(void) 1680 { 1681 struct se_hba *hba = se_global->g_lun0_hba; 1682 struct se_subsystem_dev *su_dev = se_global->g_lun0_su_dev; 1683 1684 if (!(hba)) 1685 return; 1686 1687 if (se_global->g_lun0_dev) 1688 se_free_virtual_device(se_global->g_lun0_dev, hba); 1689 1690 kfree(su_dev); 1691 core_delete_hba(hba); 1692 } 1693