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 #include <scsi/scsi_device.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_irq(&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_irq(&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 explicitly 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 __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock) 594 { 595 /* 596 * Wait for any port reference for PR ALL_TG_PT=1 operation 597 * to complete in __core_scsi3_alloc_registration() 598 */ 599 spin_unlock(&dev->se_port_lock); 600 if (atomic_read(&port->sep_tg_pt_ref_cnt)) 601 cpu_relax(); 602 spin_lock(&dev->se_port_lock); 603 604 core_alua_free_tg_pt_gp_mem(port); 605 606 list_del(&port->sep_list); 607 dev->dev_port_count--; 608 kfree(port); 609 610 return; 611 } 612 613 int core_dev_export( 614 struct se_device *dev, 615 struct se_portal_group *tpg, 616 struct se_lun *lun) 617 { 618 struct se_port *port; 619 620 port = core_alloc_port(dev); 621 if (!(port)) 622 return -1; 623 624 lun->lun_se_dev = dev; 625 se_dev_start(dev); 626 627 atomic_inc(&dev->dev_export_obj.obj_access_count); 628 core_export_port(dev, tpg, port, lun); 629 return 0; 630 } 631 632 void core_dev_unexport( 633 struct se_device *dev, 634 struct se_portal_group *tpg, 635 struct se_lun *lun) 636 { 637 struct se_port *port = lun->lun_sep; 638 639 spin_lock(&lun->lun_sep_lock); 640 if (lun->lun_se_dev == NULL) { 641 spin_unlock(&lun->lun_sep_lock); 642 return; 643 } 644 spin_unlock(&lun->lun_sep_lock); 645 646 spin_lock(&dev->se_port_lock); 647 atomic_dec(&dev->dev_export_obj.obj_access_count); 648 core_release_port(dev, port); 649 spin_unlock(&dev->se_port_lock); 650 651 se_dev_stop(dev); 652 lun->lun_se_dev = NULL; 653 } 654 655 int transport_core_report_lun_response(struct se_cmd *se_cmd) 656 { 657 struct se_dev_entry *deve; 658 struct se_lun *se_lun; 659 struct se_session *se_sess = SE_SESS(se_cmd); 660 struct se_task *se_task; 661 unsigned char *buf = (unsigned char *)T_TASK(se_cmd)->t_task_buf; 662 u32 cdb_offset = 0, lun_count = 0, offset = 8, i; 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 int_to_scsilun(0, (struct scsi_lun *)&buf[offset]); 679 lun_count = 1; 680 goto done; 681 } 682 683 spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); 684 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 685 deve = &SE_NODE_ACL(se_sess)->device_list[i]; 686 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 687 continue; 688 se_lun = deve->se_lun; 689 /* 690 * We determine the correct LUN LIST LENGTH even once we 691 * have reached the initial allocation length. 692 * See SPC2-R20 7.19. 693 */ 694 lun_count++; 695 if ((cdb_offset + 8) >= se_cmd->data_length) 696 continue; 697 698 int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]); 699 offset += 8; 700 cdb_offset += 8; 701 } 702 spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); 703 704 /* 705 * See SPC3 r07, page 159. 706 */ 707 done: 708 lun_count *= 8; 709 buf[0] = ((lun_count >> 24) & 0xff); 710 buf[1] = ((lun_count >> 16) & 0xff); 711 buf[2] = ((lun_count >> 8) & 0xff); 712 buf[3] = (lun_count & 0xff); 713 714 return PYX_TRANSPORT_SENT_TO_TRANSPORT; 715 } 716 717 /* se_release_device_for_hba(): 718 * 719 * 720 */ 721 void se_release_device_for_hba(struct se_device *dev) 722 { 723 struct se_hba *hba = dev->se_hba; 724 725 if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) || 726 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) || 727 (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) || 728 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) || 729 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED)) 730 se_dev_stop(dev); 731 732 if (dev->dev_ptr) { 733 kthread_stop(dev->process_thread); 734 if (dev->transport->free_device) 735 dev->transport->free_device(dev->dev_ptr); 736 } 737 738 spin_lock(&hba->device_lock); 739 list_del(&dev->dev_list); 740 hba->dev_count--; 741 spin_unlock(&hba->device_lock); 742 743 core_scsi3_free_all_registrations(dev); 744 se_release_vpd_for_dev(dev); 745 746 kfree(dev->dev_status_queue_obj); 747 kfree(dev->dev_queue_obj); 748 kfree(dev); 749 750 return; 751 } 752 753 void se_release_vpd_for_dev(struct se_device *dev) 754 { 755 struct t10_vpd *vpd, *vpd_tmp; 756 757 spin_lock(&DEV_T10_WWN(dev)->t10_vpd_lock); 758 list_for_each_entry_safe(vpd, vpd_tmp, 759 &DEV_T10_WWN(dev)->t10_vpd_list, vpd_list) { 760 list_del(&vpd->vpd_list); 761 kfree(vpd); 762 } 763 spin_unlock(&DEV_T10_WWN(dev)->t10_vpd_lock); 764 765 return; 766 } 767 768 /* se_free_virtual_device(): 769 * 770 * Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers. 771 */ 772 int se_free_virtual_device(struct se_device *dev, struct se_hba *hba) 773 { 774 if (!list_empty(&dev->dev_sep_list)) 775 dump_stack(); 776 777 core_alua_free_lu_gp_mem(dev); 778 se_release_device_for_hba(dev); 779 780 return 0; 781 } 782 783 static void se_dev_start(struct se_device *dev) 784 { 785 struct se_hba *hba = dev->se_hba; 786 787 spin_lock(&hba->device_lock); 788 atomic_inc(&dev->dev_obj.obj_access_count); 789 if (atomic_read(&dev->dev_obj.obj_access_count) == 1) { 790 if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) { 791 dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED; 792 dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED; 793 } else if (dev->dev_status & 794 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) { 795 dev->dev_status &= 796 ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED; 797 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED; 798 } 799 } 800 spin_unlock(&hba->device_lock); 801 } 802 803 static void se_dev_stop(struct se_device *dev) 804 { 805 struct se_hba *hba = dev->se_hba; 806 807 spin_lock(&hba->device_lock); 808 atomic_dec(&dev->dev_obj.obj_access_count); 809 if (atomic_read(&dev->dev_obj.obj_access_count) == 0) { 810 if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) { 811 dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED; 812 dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED; 813 } else if (dev->dev_status & 814 TRANSPORT_DEVICE_OFFLINE_ACTIVATED) { 815 dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED; 816 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED; 817 } 818 } 819 spin_unlock(&hba->device_lock); 820 } 821 822 int se_dev_check_online(struct se_device *dev) 823 { 824 int ret; 825 826 spin_lock_irq(&dev->dev_status_lock); 827 ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) || 828 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1; 829 spin_unlock_irq(&dev->dev_status_lock); 830 831 return ret; 832 } 833 834 int se_dev_check_shutdown(struct se_device *dev) 835 { 836 int ret; 837 838 spin_lock_irq(&dev->dev_status_lock); 839 ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN); 840 spin_unlock_irq(&dev->dev_status_lock); 841 842 return ret; 843 } 844 845 void se_dev_set_default_attribs( 846 struct se_device *dev, 847 struct se_dev_limits *dev_limits) 848 { 849 struct queue_limits *limits = &dev_limits->limits; 850 851 DEV_ATTRIB(dev)->emulate_dpo = DA_EMULATE_DPO; 852 DEV_ATTRIB(dev)->emulate_fua_write = DA_EMULATE_FUA_WRITE; 853 DEV_ATTRIB(dev)->emulate_fua_read = DA_EMULATE_FUA_READ; 854 DEV_ATTRIB(dev)->emulate_write_cache = DA_EMULATE_WRITE_CACHE; 855 DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL; 856 DEV_ATTRIB(dev)->emulate_tas = DA_EMULATE_TAS; 857 DEV_ATTRIB(dev)->emulate_tpu = DA_EMULATE_TPU; 858 DEV_ATTRIB(dev)->emulate_tpws = DA_EMULATE_TPWS; 859 DEV_ATTRIB(dev)->emulate_reservations = DA_EMULATE_RESERVATIONS; 860 DEV_ATTRIB(dev)->emulate_alua = DA_EMULATE_ALUA; 861 DEV_ATTRIB(dev)->enforce_pr_isids = DA_ENFORCE_PR_ISIDS; 862 /* 863 * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK 864 * iblock_create_virtdevice() from struct queue_limits values 865 * if blk_queue_discard()==1 866 */ 867 DEV_ATTRIB(dev)->max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT; 868 DEV_ATTRIB(dev)->max_unmap_block_desc_count = 869 DA_MAX_UNMAP_BLOCK_DESC_COUNT; 870 DEV_ATTRIB(dev)->unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT; 871 DEV_ATTRIB(dev)->unmap_granularity_alignment = 872 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT; 873 /* 874 * block_size is based on subsystem plugin dependent requirements. 875 */ 876 DEV_ATTRIB(dev)->hw_block_size = limits->logical_block_size; 877 DEV_ATTRIB(dev)->block_size = limits->logical_block_size; 878 /* 879 * max_sectors is based on subsystem plugin dependent requirements. 880 */ 881 DEV_ATTRIB(dev)->hw_max_sectors = limits->max_hw_sectors; 882 DEV_ATTRIB(dev)->max_sectors = limits->max_sectors; 883 /* 884 * Set optimal_sectors from max_sectors, which can be lowered via 885 * configfs. 886 */ 887 DEV_ATTRIB(dev)->optimal_sectors = limits->max_sectors; 888 /* 889 * queue_depth is based on subsystem plugin dependent requirements. 890 */ 891 DEV_ATTRIB(dev)->hw_queue_depth = dev_limits->hw_queue_depth; 892 DEV_ATTRIB(dev)->queue_depth = dev_limits->queue_depth; 893 } 894 895 int se_dev_set_task_timeout(struct se_device *dev, u32 task_timeout) 896 { 897 if (task_timeout > DA_TASK_TIMEOUT_MAX) { 898 printk(KERN_ERR "dev[%p]: Passed task_timeout: %u larger then" 899 " DA_TASK_TIMEOUT_MAX\n", dev, task_timeout); 900 return -1; 901 } else { 902 DEV_ATTRIB(dev)->task_timeout = task_timeout; 903 printk(KERN_INFO "dev[%p]: Set SE Device task_timeout: %u\n", 904 dev, task_timeout); 905 } 906 907 return 0; 908 } 909 910 int se_dev_set_max_unmap_lba_count( 911 struct se_device *dev, 912 u32 max_unmap_lba_count) 913 { 914 DEV_ATTRIB(dev)->max_unmap_lba_count = max_unmap_lba_count; 915 printk(KERN_INFO "dev[%p]: Set max_unmap_lba_count: %u\n", 916 dev, DEV_ATTRIB(dev)->max_unmap_lba_count); 917 return 0; 918 } 919 920 int se_dev_set_max_unmap_block_desc_count( 921 struct se_device *dev, 922 u32 max_unmap_block_desc_count) 923 { 924 DEV_ATTRIB(dev)->max_unmap_block_desc_count = max_unmap_block_desc_count; 925 printk(KERN_INFO "dev[%p]: Set max_unmap_block_desc_count: %u\n", 926 dev, DEV_ATTRIB(dev)->max_unmap_block_desc_count); 927 return 0; 928 } 929 930 int se_dev_set_unmap_granularity( 931 struct se_device *dev, 932 u32 unmap_granularity) 933 { 934 DEV_ATTRIB(dev)->unmap_granularity = unmap_granularity; 935 printk(KERN_INFO "dev[%p]: Set unmap_granularity: %u\n", 936 dev, DEV_ATTRIB(dev)->unmap_granularity); 937 return 0; 938 } 939 940 int se_dev_set_unmap_granularity_alignment( 941 struct se_device *dev, 942 u32 unmap_granularity_alignment) 943 { 944 DEV_ATTRIB(dev)->unmap_granularity_alignment = unmap_granularity_alignment; 945 printk(KERN_INFO "dev[%p]: Set unmap_granularity_alignment: %u\n", 946 dev, DEV_ATTRIB(dev)->unmap_granularity_alignment); 947 return 0; 948 } 949 950 int se_dev_set_emulate_dpo(struct se_device *dev, int flag) 951 { 952 if ((flag != 0) && (flag != 1)) { 953 printk(KERN_ERR "Illegal value %d\n", flag); 954 return -1; 955 } 956 if (TRANSPORT(dev)->dpo_emulated == NULL) { 957 printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated is NULL\n"); 958 return -1; 959 } 960 if (TRANSPORT(dev)->dpo_emulated(dev) == 0) { 961 printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated not supported\n"); 962 return -1; 963 } 964 DEV_ATTRIB(dev)->emulate_dpo = flag; 965 printk(KERN_INFO "dev[%p]: SE Device Page Out (DPO) Emulation" 966 " bit: %d\n", dev, DEV_ATTRIB(dev)->emulate_dpo); 967 return 0; 968 } 969 970 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag) 971 { 972 if ((flag != 0) && (flag != 1)) { 973 printk(KERN_ERR "Illegal value %d\n", flag); 974 return -1; 975 } 976 if (TRANSPORT(dev)->fua_write_emulated == NULL) { 977 printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated is NULL\n"); 978 return -1; 979 } 980 if (TRANSPORT(dev)->fua_write_emulated(dev) == 0) { 981 printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated not supported\n"); 982 return -1; 983 } 984 DEV_ATTRIB(dev)->emulate_fua_write = flag; 985 printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access WRITEs: %d\n", 986 dev, DEV_ATTRIB(dev)->emulate_fua_write); 987 return 0; 988 } 989 990 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag) 991 { 992 if ((flag != 0) && (flag != 1)) { 993 printk(KERN_ERR "Illegal value %d\n", flag); 994 return -1; 995 } 996 if (TRANSPORT(dev)->fua_read_emulated == NULL) { 997 printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated is NULL\n"); 998 return -1; 999 } 1000 if (TRANSPORT(dev)->fua_read_emulated(dev) == 0) { 1001 printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated not supported\n"); 1002 return -1; 1003 } 1004 DEV_ATTRIB(dev)->emulate_fua_read = flag; 1005 printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access READs: %d\n", 1006 dev, DEV_ATTRIB(dev)->emulate_fua_read); 1007 return 0; 1008 } 1009 1010 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag) 1011 { 1012 if ((flag != 0) && (flag != 1)) { 1013 printk(KERN_ERR "Illegal value %d\n", flag); 1014 return -1; 1015 } 1016 if (TRANSPORT(dev)->write_cache_emulated == NULL) { 1017 printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated is NULL\n"); 1018 return -1; 1019 } 1020 if (TRANSPORT(dev)->write_cache_emulated(dev) == 0) { 1021 printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated not supported\n"); 1022 return -1; 1023 } 1024 DEV_ATTRIB(dev)->emulate_write_cache = flag; 1025 printk(KERN_INFO "dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 1026 dev, DEV_ATTRIB(dev)->emulate_write_cache); 1027 return 0; 1028 } 1029 1030 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag) 1031 { 1032 if ((flag != 0) && (flag != 1) && (flag != 2)) { 1033 printk(KERN_ERR "Illegal value %d\n", flag); 1034 return -1; 1035 } 1036 1037 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1038 printk(KERN_ERR "dev[%p]: Unable to change SE Device" 1039 " UA_INTRLCK_CTRL while dev_export_obj: %d count" 1040 " exists\n", dev, 1041 atomic_read(&dev->dev_export_obj.obj_access_count)); 1042 return -1; 1043 } 1044 DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = flag; 1045 printk(KERN_INFO "dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 1046 dev, DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl); 1047 1048 return 0; 1049 } 1050 1051 int se_dev_set_emulate_tas(struct se_device *dev, int flag) 1052 { 1053 if ((flag != 0) && (flag != 1)) { 1054 printk(KERN_ERR "Illegal value %d\n", flag); 1055 return -1; 1056 } 1057 1058 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1059 printk(KERN_ERR "dev[%p]: Unable to change SE Device TAS while" 1060 " dev_export_obj: %d count exists\n", dev, 1061 atomic_read(&dev->dev_export_obj.obj_access_count)); 1062 return -1; 1063 } 1064 DEV_ATTRIB(dev)->emulate_tas = flag; 1065 printk(KERN_INFO "dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 1066 dev, (DEV_ATTRIB(dev)->emulate_tas) ? "Enabled" : "Disabled"); 1067 1068 return 0; 1069 } 1070 1071 int se_dev_set_emulate_tpu(struct se_device *dev, int flag) 1072 { 1073 if ((flag != 0) && (flag != 1)) { 1074 printk(KERN_ERR "Illegal value %d\n", flag); 1075 return -1; 1076 } 1077 /* 1078 * We expect this value to be non-zero when generic Block Layer 1079 * Discard supported is detected iblock_create_virtdevice(). 1080 */ 1081 if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) { 1082 printk(KERN_ERR "Generic Block Discard not supported\n"); 1083 return -ENOSYS; 1084 } 1085 1086 DEV_ATTRIB(dev)->emulate_tpu = flag; 1087 printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 1088 dev, flag); 1089 return 0; 1090 } 1091 1092 int se_dev_set_emulate_tpws(struct se_device *dev, int flag) 1093 { 1094 if ((flag != 0) && (flag != 1)) { 1095 printk(KERN_ERR "Illegal value %d\n", flag); 1096 return -1; 1097 } 1098 /* 1099 * We expect this value to be non-zero when generic Block Layer 1100 * Discard supported is detected iblock_create_virtdevice(). 1101 */ 1102 if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) { 1103 printk(KERN_ERR "Generic Block Discard not supported\n"); 1104 return -ENOSYS; 1105 } 1106 1107 DEV_ATTRIB(dev)->emulate_tpws = flag; 1108 printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 1109 dev, flag); 1110 return 0; 1111 } 1112 1113 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag) 1114 { 1115 if ((flag != 0) && (flag != 1)) { 1116 printk(KERN_ERR "Illegal value %d\n", flag); 1117 return -1; 1118 } 1119 DEV_ATTRIB(dev)->enforce_pr_isids = flag; 1120 printk(KERN_INFO "dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev, 1121 (DEV_ATTRIB(dev)->enforce_pr_isids) ? "Enabled" : "Disabled"); 1122 return 0; 1123 } 1124 1125 /* 1126 * Note, this can only be called on unexported SE Device Object. 1127 */ 1128 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth) 1129 { 1130 u32 orig_queue_depth = dev->queue_depth; 1131 1132 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1133 printk(KERN_ERR "dev[%p]: Unable to change SE Device TCQ while" 1134 " dev_export_obj: %d count exists\n", dev, 1135 atomic_read(&dev->dev_export_obj.obj_access_count)); 1136 return -1; 1137 } 1138 if (!(queue_depth)) { 1139 printk(KERN_ERR "dev[%p]: Illegal ZERO value for queue" 1140 "_depth\n", dev); 1141 return -1; 1142 } 1143 1144 if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1145 if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) { 1146 printk(KERN_ERR "dev[%p]: Passed queue_depth: %u" 1147 " exceeds TCM/SE_Device TCQ: %u\n", 1148 dev, queue_depth, 1149 DEV_ATTRIB(dev)->hw_queue_depth); 1150 return -1; 1151 } 1152 } else { 1153 if (queue_depth > DEV_ATTRIB(dev)->queue_depth) { 1154 if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) { 1155 printk(KERN_ERR "dev[%p]: Passed queue_depth:" 1156 " %u exceeds TCM/SE_Device MAX" 1157 " TCQ: %u\n", dev, queue_depth, 1158 DEV_ATTRIB(dev)->hw_queue_depth); 1159 return -1; 1160 } 1161 } 1162 } 1163 1164 DEV_ATTRIB(dev)->queue_depth = dev->queue_depth = queue_depth; 1165 if (queue_depth > orig_queue_depth) 1166 atomic_add(queue_depth - orig_queue_depth, &dev->depth_left); 1167 else if (queue_depth < orig_queue_depth) 1168 atomic_sub(orig_queue_depth - queue_depth, &dev->depth_left); 1169 1170 printk(KERN_INFO "dev[%p]: SE Device TCQ Depth changed to: %u\n", 1171 dev, queue_depth); 1172 return 0; 1173 } 1174 1175 int se_dev_set_max_sectors(struct se_device *dev, u32 max_sectors) 1176 { 1177 int force = 0; /* Force setting for VDEVS */ 1178 1179 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1180 printk(KERN_ERR "dev[%p]: Unable to change SE Device" 1181 " max_sectors while dev_export_obj: %d count exists\n", 1182 dev, atomic_read(&dev->dev_export_obj.obj_access_count)); 1183 return -1; 1184 } 1185 if (!(max_sectors)) { 1186 printk(KERN_ERR "dev[%p]: Illegal ZERO value for" 1187 " max_sectors\n", dev); 1188 return -1; 1189 } 1190 if (max_sectors < DA_STATUS_MAX_SECTORS_MIN) { 1191 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u less than" 1192 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, max_sectors, 1193 DA_STATUS_MAX_SECTORS_MIN); 1194 return -1; 1195 } 1196 if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1197 if (max_sectors > DEV_ATTRIB(dev)->hw_max_sectors) { 1198 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u" 1199 " greater than TCM/SE_Device max_sectors:" 1200 " %u\n", dev, max_sectors, 1201 DEV_ATTRIB(dev)->hw_max_sectors); 1202 return -1; 1203 } 1204 } else { 1205 if (!(force) && (max_sectors > 1206 DEV_ATTRIB(dev)->hw_max_sectors)) { 1207 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u" 1208 " greater than TCM/SE_Device max_sectors" 1209 ": %u, use force=1 to override.\n", dev, 1210 max_sectors, DEV_ATTRIB(dev)->hw_max_sectors); 1211 return -1; 1212 } 1213 if (max_sectors > DA_STATUS_MAX_SECTORS_MAX) { 1214 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u" 1215 " greater than DA_STATUS_MAX_SECTORS_MAX:" 1216 " %u\n", dev, max_sectors, 1217 DA_STATUS_MAX_SECTORS_MAX); 1218 return -1; 1219 } 1220 } 1221 1222 DEV_ATTRIB(dev)->max_sectors = max_sectors; 1223 printk("dev[%p]: SE Device max_sectors changed to %u\n", 1224 dev, max_sectors); 1225 return 0; 1226 } 1227 1228 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors) 1229 { 1230 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1231 printk(KERN_ERR "dev[%p]: Unable to change SE Device" 1232 " optimal_sectors while dev_export_obj: %d count exists\n", 1233 dev, atomic_read(&dev->dev_export_obj.obj_access_count)); 1234 return -EINVAL; 1235 } 1236 if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1237 printk(KERN_ERR "dev[%p]: Passed optimal_sectors cannot be" 1238 " changed for TCM/pSCSI\n", dev); 1239 return -EINVAL; 1240 } 1241 if (optimal_sectors > DEV_ATTRIB(dev)->max_sectors) { 1242 printk(KERN_ERR "dev[%p]: Passed optimal_sectors %u cannot be" 1243 " greater than max_sectors: %u\n", dev, 1244 optimal_sectors, DEV_ATTRIB(dev)->max_sectors); 1245 return -EINVAL; 1246 } 1247 1248 DEV_ATTRIB(dev)->optimal_sectors = optimal_sectors; 1249 printk(KERN_INFO "dev[%p]: SE Device optimal_sectors changed to %u\n", 1250 dev, optimal_sectors); 1251 return 0; 1252 } 1253 1254 int se_dev_set_block_size(struct se_device *dev, u32 block_size) 1255 { 1256 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1257 printk(KERN_ERR "dev[%p]: Unable to change SE Device block_size" 1258 " while dev_export_obj: %d count exists\n", dev, 1259 atomic_read(&dev->dev_export_obj.obj_access_count)); 1260 return -1; 1261 } 1262 1263 if ((block_size != 512) && 1264 (block_size != 1024) && 1265 (block_size != 2048) && 1266 (block_size != 4096)) { 1267 printk(KERN_ERR "dev[%p]: Illegal value for block_device: %u" 1268 " for SE device, must be 512, 1024, 2048 or 4096\n", 1269 dev, block_size); 1270 return -1; 1271 } 1272 1273 if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1274 printk(KERN_ERR "dev[%p]: Not allowed to change block_size for" 1275 " Physical Device, use for Linux/SCSI to change" 1276 " block_size for underlying hardware\n", dev); 1277 return -1; 1278 } 1279 1280 DEV_ATTRIB(dev)->block_size = block_size; 1281 printk(KERN_INFO "dev[%p]: SE Device block_size changed to %u\n", 1282 dev, block_size); 1283 return 0; 1284 } 1285 1286 struct se_lun *core_dev_add_lun( 1287 struct se_portal_group *tpg, 1288 struct se_hba *hba, 1289 struct se_device *dev, 1290 u32 lun) 1291 { 1292 struct se_lun *lun_p; 1293 u32 lun_access = 0; 1294 1295 if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) { 1296 printk(KERN_ERR "Unable to export struct se_device while dev_access_obj: %d\n", 1297 atomic_read(&dev->dev_access_obj.obj_access_count)); 1298 return NULL; 1299 } 1300 1301 lun_p = core_tpg_pre_addlun(tpg, lun); 1302 if ((IS_ERR(lun_p)) || !(lun_p)) 1303 return NULL; 1304 1305 if (dev->dev_flags & DF_READ_ONLY) 1306 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; 1307 else 1308 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE; 1309 1310 if (core_tpg_post_addlun(tpg, lun_p, lun_access, dev) < 0) 1311 return NULL; 1312 1313 printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from" 1314 " CORE HBA: %u\n", TPG_TFO(tpg)->get_fabric_name(), 1315 TPG_TFO(tpg)->tpg_get_tag(tpg), lun_p->unpacked_lun, 1316 TPG_TFO(tpg)->get_fabric_name(), hba->hba_id); 1317 /* 1318 * Update LUN maps for dynamically added initiators when 1319 * generate_node_acl is enabled. 1320 */ 1321 if (TPG_TFO(tpg)->tpg_check_demo_mode(tpg)) { 1322 struct se_node_acl *acl; 1323 spin_lock_bh(&tpg->acl_node_lock); 1324 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { 1325 if (acl->dynamic_node_acl) { 1326 spin_unlock_bh(&tpg->acl_node_lock); 1327 core_tpg_add_node_to_devs(acl, tpg); 1328 spin_lock_bh(&tpg->acl_node_lock); 1329 } 1330 } 1331 spin_unlock_bh(&tpg->acl_node_lock); 1332 } 1333 1334 return lun_p; 1335 } 1336 1337 /* core_dev_del_lun(): 1338 * 1339 * 1340 */ 1341 int core_dev_del_lun( 1342 struct se_portal_group *tpg, 1343 u32 unpacked_lun) 1344 { 1345 struct se_lun *lun; 1346 int ret = 0; 1347 1348 lun = core_tpg_pre_dellun(tpg, unpacked_lun, &ret); 1349 if (!(lun)) 1350 return ret; 1351 1352 core_tpg_post_dellun(tpg, lun); 1353 1354 printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from" 1355 " device object\n", TPG_TFO(tpg)->get_fabric_name(), 1356 TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun, 1357 TPG_TFO(tpg)->get_fabric_name()); 1358 1359 return 0; 1360 } 1361 1362 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun) 1363 { 1364 struct se_lun *lun; 1365 1366 spin_lock(&tpg->tpg_lun_lock); 1367 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1368 printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS" 1369 "_PER_TPG-1: %u for Target Portal Group: %hu\n", 1370 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, 1371 TRANSPORT_MAX_LUNS_PER_TPG-1, 1372 TPG_TFO(tpg)->tpg_get_tag(tpg)); 1373 spin_unlock(&tpg->tpg_lun_lock); 1374 return NULL; 1375 } 1376 lun = &tpg->tpg_lun_list[unpacked_lun]; 1377 1378 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) { 1379 printk(KERN_ERR "%s Logical Unit Number: %u is not free on" 1380 " Target Portal Group: %hu, ignoring request.\n", 1381 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, 1382 TPG_TFO(tpg)->tpg_get_tag(tpg)); 1383 spin_unlock(&tpg->tpg_lun_lock); 1384 return NULL; 1385 } 1386 spin_unlock(&tpg->tpg_lun_lock); 1387 1388 return lun; 1389 } 1390 1391 /* core_dev_get_lun(): 1392 * 1393 * 1394 */ 1395 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun) 1396 { 1397 struct se_lun *lun; 1398 1399 spin_lock(&tpg->tpg_lun_lock); 1400 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1401 printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER" 1402 "_TPG-1: %u for Target Portal Group: %hu\n", 1403 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, 1404 TRANSPORT_MAX_LUNS_PER_TPG-1, 1405 TPG_TFO(tpg)->tpg_get_tag(tpg)); 1406 spin_unlock(&tpg->tpg_lun_lock); 1407 return NULL; 1408 } 1409 lun = &tpg->tpg_lun_list[unpacked_lun]; 1410 1411 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { 1412 printk(KERN_ERR "%s Logical Unit Number: %u is not active on" 1413 " Target Portal Group: %hu, ignoring request.\n", 1414 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, 1415 TPG_TFO(tpg)->tpg_get_tag(tpg)); 1416 spin_unlock(&tpg->tpg_lun_lock); 1417 return NULL; 1418 } 1419 spin_unlock(&tpg->tpg_lun_lock); 1420 1421 return lun; 1422 } 1423 1424 struct se_lun_acl *core_dev_init_initiator_node_lun_acl( 1425 struct se_portal_group *tpg, 1426 u32 mapped_lun, 1427 char *initiatorname, 1428 int *ret) 1429 { 1430 struct se_lun_acl *lacl; 1431 struct se_node_acl *nacl; 1432 1433 if (strlen(initiatorname) > TRANSPORT_IQN_LEN) { 1434 printk(KERN_ERR "%s InitiatorName exceeds maximum size.\n", 1435 TPG_TFO(tpg)->get_fabric_name()); 1436 *ret = -EOVERFLOW; 1437 return NULL; 1438 } 1439 nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname); 1440 if (!(nacl)) { 1441 *ret = -EINVAL; 1442 return NULL; 1443 } 1444 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL); 1445 if (!(lacl)) { 1446 printk(KERN_ERR "Unable to allocate memory for struct se_lun_acl.\n"); 1447 *ret = -ENOMEM; 1448 return NULL; 1449 } 1450 1451 INIT_LIST_HEAD(&lacl->lacl_list); 1452 lacl->mapped_lun = mapped_lun; 1453 lacl->se_lun_nacl = nacl; 1454 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); 1455 1456 return lacl; 1457 } 1458 1459 int core_dev_add_initiator_node_lun_acl( 1460 struct se_portal_group *tpg, 1461 struct se_lun_acl *lacl, 1462 u32 unpacked_lun, 1463 u32 lun_access) 1464 { 1465 struct se_lun *lun; 1466 struct se_node_acl *nacl; 1467 1468 lun = core_dev_get_lun(tpg, unpacked_lun); 1469 if (!(lun)) { 1470 printk(KERN_ERR "%s Logical Unit Number: %u is not active on" 1471 " Target Portal Group: %hu, ignoring request.\n", 1472 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, 1473 TPG_TFO(tpg)->tpg_get_tag(tpg)); 1474 return -EINVAL; 1475 } 1476 1477 nacl = lacl->se_lun_nacl; 1478 if (!(nacl)) 1479 return -EINVAL; 1480 1481 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) && 1482 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE)) 1483 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; 1484 1485 lacl->se_lun = lun; 1486 1487 if (core_update_device_list_for_node(lun, lacl, lacl->mapped_lun, 1488 lun_access, nacl, tpg, 1) < 0) 1489 return -EINVAL; 1490 1491 spin_lock(&lun->lun_acl_lock); 1492 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list); 1493 atomic_inc(&lun->lun_acl_count); 1494 smp_mb__after_atomic_inc(); 1495 spin_unlock(&lun->lun_acl_lock); 1496 1497 printk(KERN_INFO "%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for " 1498 " InitiatorNode: %s\n", TPG_TFO(tpg)->get_fabric_name(), 1499 TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun, 1500 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO", 1501 lacl->initiatorname); 1502 /* 1503 * Check to see if there are any existing persistent reservation APTPL 1504 * pre-registrations that need to be enabled for this LUN ACL.. 1505 */ 1506 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl); 1507 return 0; 1508 } 1509 1510 /* core_dev_del_initiator_node_lun_acl(): 1511 * 1512 * 1513 */ 1514 int core_dev_del_initiator_node_lun_acl( 1515 struct se_portal_group *tpg, 1516 struct se_lun *lun, 1517 struct se_lun_acl *lacl) 1518 { 1519 struct se_node_acl *nacl; 1520 1521 nacl = lacl->se_lun_nacl; 1522 if (!(nacl)) 1523 return -EINVAL; 1524 1525 spin_lock(&lun->lun_acl_lock); 1526 list_del(&lacl->lacl_list); 1527 atomic_dec(&lun->lun_acl_count); 1528 smp_mb__after_atomic_dec(); 1529 spin_unlock(&lun->lun_acl_lock); 1530 1531 core_update_device_list_for_node(lun, NULL, lacl->mapped_lun, 1532 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0); 1533 1534 lacl->se_lun = NULL; 1535 1536 printk(KERN_INFO "%s_TPG[%hu]_LUN[%u] - Removed ACL for" 1537 " InitiatorNode: %s Mapped LUN: %u\n", 1538 TPG_TFO(tpg)->get_fabric_name(), 1539 TPG_TFO(tpg)->tpg_get_tag(tpg), lun->unpacked_lun, 1540 lacl->initiatorname, lacl->mapped_lun); 1541 1542 return 0; 1543 } 1544 1545 void core_dev_free_initiator_node_lun_acl( 1546 struct se_portal_group *tpg, 1547 struct se_lun_acl *lacl) 1548 { 1549 printk("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s" 1550 " Mapped LUN: %u\n", TPG_TFO(tpg)->get_fabric_name(), 1551 TPG_TFO(tpg)->tpg_get_tag(tpg), 1552 TPG_TFO(tpg)->get_fabric_name(), 1553 lacl->initiatorname, lacl->mapped_lun); 1554 1555 kfree(lacl); 1556 } 1557 1558 int core_dev_setup_virtual_lun0(void) 1559 { 1560 struct se_hba *hba; 1561 struct se_device *dev; 1562 struct se_subsystem_dev *se_dev = NULL; 1563 struct se_subsystem_api *t; 1564 char buf[16]; 1565 int ret; 1566 1567 hba = core_alloc_hba("rd_dr", 0, HBA_FLAGS_INTERNAL_USE); 1568 if (IS_ERR(hba)) 1569 return PTR_ERR(hba); 1570 1571 se_global->g_lun0_hba = hba; 1572 t = hba->transport; 1573 1574 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL); 1575 if (!(se_dev)) { 1576 printk(KERN_ERR "Unable to allocate memory for" 1577 " struct se_subsystem_dev\n"); 1578 ret = -ENOMEM; 1579 goto out; 1580 } 1581 INIT_LIST_HEAD(&se_dev->g_se_dev_list); 1582 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list); 1583 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock); 1584 INIT_LIST_HEAD(&se_dev->t10_reservation.registration_list); 1585 INIT_LIST_HEAD(&se_dev->t10_reservation.aptpl_reg_list); 1586 spin_lock_init(&se_dev->t10_reservation.registration_lock); 1587 spin_lock_init(&se_dev->t10_reservation.aptpl_reg_lock); 1588 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list); 1589 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock); 1590 spin_lock_init(&se_dev->se_dev_lock); 1591 se_dev->t10_reservation.pr_aptpl_buf_len = PR_APTPL_BUF_LEN; 1592 se_dev->t10_wwn.t10_sub_dev = se_dev; 1593 se_dev->t10_alua.t10_sub_dev = se_dev; 1594 se_dev->se_dev_attrib.da_sub_dev = se_dev; 1595 se_dev->se_dev_hba = hba; 1596 1597 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0"); 1598 if (!(se_dev->se_dev_su_ptr)) { 1599 printk(KERN_ERR "Unable to locate subsystem dependent pointer" 1600 " from allocate_virtdevice()\n"); 1601 ret = -ENOMEM; 1602 goto out; 1603 } 1604 se_global->g_lun0_su_dev = se_dev; 1605 1606 memset(buf, 0, 16); 1607 sprintf(buf, "rd_pages=8"); 1608 t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf)); 1609 1610 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr); 1611 if (!(dev) || IS_ERR(dev)) { 1612 ret = -ENOMEM; 1613 goto out; 1614 } 1615 se_dev->se_dev_ptr = dev; 1616 se_global->g_lun0_dev = dev; 1617 1618 return 0; 1619 out: 1620 se_global->g_lun0_su_dev = NULL; 1621 kfree(se_dev); 1622 if (se_global->g_lun0_hba) { 1623 core_delete_hba(se_global->g_lun0_hba); 1624 se_global->g_lun0_hba = NULL; 1625 } 1626 return ret; 1627 } 1628 1629 1630 void core_dev_release_virtual_lun0(void) 1631 { 1632 struct se_hba *hba = se_global->g_lun0_hba; 1633 struct se_subsystem_dev *su_dev = se_global->g_lun0_su_dev; 1634 1635 if (!(hba)) 1636 return; 1637 1638 if (se_global->g_lun0_dev) 1639 se_free_virtual_device(se_global->g_lun0_dev, hba); 1640 1641 kfree(su_dev); 1642 core_delete_hba(hba); 1643 } 1644