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_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 se_tmr->tmr_dev = dev; 220 221 spin_lock(&dev->se_tmr_lock); 222 list_add_tail(&se_tmr->tmr_list, &dev->dev_tmr_list); 223 spin_unlock(&dev->se_tmr_lock); 224 225 return 0; 226 } 227 EXPORT_SYMBOL(transport_get_lun_for_tmr); 228 229 /* 230 * This function is called from core_scsi3_emulate_pro_register_and_move() 231 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count 232 * when a matching rtpi is found. 233 */ 234 struct se_dev_entry *core_get_se_deve_from_rtpi( 235 struct se_node_acl *nacl, 236 u16 rtpi) 237 { 238 struct se_dev_entry *deve; 239 struct se_lun *lun; 240 struct se_port *port; 241 struct se_portal_group *tpg = nacl->se_tpg; 242 u32 i; 243 244 spin_lock_irq(&nacl->device_list_lock); 245 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 246 deve = &nacl->device_list[i]; 247 248 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 249 continue; 250 251 lun = deve->se_lun; 252 if (!(lun)) { 253 printk(KERN_ERR "%s device entries device pointer is" 254 " NULL, but Initiator has access.\n", 255 TPG_TFO(tpg)->get_fabric_name()); 256 continue; 257 } 258 port = lun->lun_sep; 259 if (!(port)) { 260 printk(KERN_ERR "%s device entries device pointer is" 261 " NULL, but Initiator has access.\n", 262 TPG_TFO(tpg)->get_fabric_name()); 263 continue; 264 } 265 if (port->sep_rtpi != rtpi) 266 continue; 267 268 atomic_inc(&deve->pr_ref_count); 269 smp_mb__after_atomic_inc(); 270 spin_unlock_irq(&nacl->device_list_lock); 271 272 return deve; 273 } 274 spin_unlock_irq(&nacl->device_list_lock); 275 276 return NULL; 277 } 278 279 int core_free_device_list_for_node( 280 struct se_node_acl *nacl, 281 struct se_portal_group *tpg) 282 { 283 struct se_dev_entry *deve; 284 struct se_lun *lun; 285 u32 i; 286 287 if (!nacl->device_list) 288 return 0; 289 290 spin_lock_irq(&nacl->device_list_lock); 291 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 292 deve = &nacl->device_list[i]; 293 294 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 295 continue; 296 297 if (!deve->se_lun) { 298 printk(KERN_ERR "%s device entries device pointer is" 299 " NULL, but Initiator has access.\n", 300 TPG_TFO(tpg)->get_fabric_name()); 301 continue; 302 } 303 lun = deve->se_lun; 304 305 spin_unlock_irq(&nacl->device_list_lock); 306 core_update_device_list_for_node(lun, NULL, deve->mapped_lun, 307 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0); 308 spin_lock_irq(&nacl->device_list_lock); 309 } 310 spin_unlock_irq(&nacl->device_list_lock); 311 312 kfree(nacl->device_list); 313 nacl->device_list = NULL; 314 315 return 0; 316 } 317 318 void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd) 319 { 320 struct se_dev_entry *deve; 321 322 spin_lock_irq(&se_nacl->device_list_lock); 323 deve = &se_nacl->device_list[se_cmd->orig_fe_lun]; 324 deve->deve_cmds--; 325 spin_unlock_irq(&se_nacl->device_list_lock); 326 327 return; 328 } 329 330 void core_update_device_list_access( 331 u32 mapped_lun, 332 u32 lun_access, 333 struct se_node_acl *nacl) 334 { 335 struct se_dev_entry *deve; 336 337 spin_lock_irq(&nacl->device_list_lock); 338 deve = &nacl->device_list[mapped_lun]; 339 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 340 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 341 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 342 } else { 343 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 344 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 345 } 346 spin_unlock_irq(&nacl->device_list_lock); 347 348 return; 349 } 350 351 /* core_update_device_list_for_node(): 352 * 353 * 354 */ 355 int core_update_device_list_for_node( 356 struct se_lun *lun, 357 struct se_lun_acl *lun_acl, 358 u32 mapped_lun, 359 u32 lun_access, 360 struct se_node_acl *nacl, 361 struct se_portal_group *tpg, 362 int enable) 363 { 364 struct se_port *port = lun->lun_sep; 365 struct se_dev_entry *deve = &nacl->device_list[mapped_lun]; 366 int trans = 0; 367 /* 368 * If the MappedLUN entry is being disabled, the entry in 369 * port->sep_alua_list must be removed now before clearing the 370 * struct se_dev_entry pointers below as logic in 371 * core_alua_do_transition_tg_pt() depends on these being present. 372 */ 373 if (!(enable)) { 374 /* 375 * deve->se_lun_acl will be NULL for demo-mode created LUNs 376 * that have not been explicitly concerted to MappedLUNs -> 377 * struct se_lun_acl, but we remove deve->alua_port_list from 378 * port->sep_alua_list. This also means that active UAs and 379 * NodeACL context specific PR metadata for demo-mode 380 * MappedLUN *deve will be released below.. 381 */ 382 spin_lock_bh(&port->sep_alua_lock); 383 list_del(&deve->alua_port_list); 384 spin_unlock_bh(&port->sep_alua_lock); 385 } 386 387 spin_lock_irq(&nacl->device_list_lock); 388 if (enable) { 389 /* 390 * Check if the call is handling demo mode -> explict LUN ACL 391 * transition. This transition must be for the same struct se_lun 392 * + mapped_lun that was setup in demo mode.. 393 */ 394 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 395 if (deve->se_lun_acl != NULL) { 396 printk(KERN_ERR "struct se_dev_entry->se_lun_acl" 397 " already set for demo mode -> explict" 398 " LUN ACL transition\n"); 399 spin_unlock_irq(&nacl->device_list_lock); 400 return -1; 401 } 402 if (deve->se_lun != lun) { 403 printk(KERN_ERR "struct se_dev_entry->se_lun does" 404 " match passed struct se_lun for demo mode" 405 " -> explict LUN ACL transition\n"); 406 spin_unlock_irq(&nacl->device_list_lock); 407 return -1; 408 } 409 deve->se_lun_acl = lun_acl; 410 trans = 1; 411 } else { 412 deve->se_lun = lun; 413 deve->se_lun_acl = lun_acl; 414 deve->mapped_lun = mapped_lun; 415 deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS; 416 } 417 418 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 419 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 420 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 421 } else { 422 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 423 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 424 } 425 426 if (trans) { 427 spin_unlock_irq(&nacl->device_list_lock); 428 return 0; 429 } 430 deve->creation_time = get_jiffies_64(); 431 deve->attach_count++; 432 spin_unlock_irq(&nacl->device_list_lock); 433 434 spin_lock_bh(&port->sep_alua_lock); 435 list_add_tail(&deve->alua_port_list, &port->sep_alua_list); 436 spin_unlock_bh(&port->sep_alua_lock); 437 438 return 0; 439 } 440 /* 441 * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE 442 * PR operation to complete. 443 */ 444 spin_unlock_irq(&nacl->device_list_lock); 445 while (atomic_read(&deve->pr_ref_count) != 0) 446 cpu_relax(); 447 spin_lock_irq(&nacl->device_list_lock); 448 /* 449 * Disable struct se_dev_entry LUN ACL mapping 450 */ 451 core_scsi3_ua_release_all(deve); 452 deve->se_lun = NULL; 453 deve->se_lun_acl = NULL; 454 deve->lun_flags = 0; 455 deve->creation_time = 0; 456 deve->attach_count--; 457 spin_unlock_irq(&nacl->device_list_lock); 458 459 core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl); 460 return 0; 461 } 462 463 /* core_clear_lun_from_tpg(): 464 * 465 * 466 */ 467 void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg) 468 { 469 struct se_node_acl *nacl; 470 struct se_dev_entry *deve; 471 u32 i; 472 473 spin_lock_bh(&tpg->acl_node_lock); 474 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) { 475 spin_unlock_bh(&tpg->acl_node_lock); 476 477 spin_lock_irq(&nacl->device_list_lock); 478 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 479 deve = &nacl->device_list[i]; 480 if (lun != deve->se_lun) 481 continue; 482 spin_unlock_irq(&nacl->device_list_lock); 483 484 core_update_device_list_for_node(lun, NULL, 485 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS, 486 nacl, tpg, 0); 487 488 spin_lock_irq(&nacl->device_list_lock); 489 } 490 spin_unlock_irq(&nacl->device_list_lock); 491 492 spin_lock_bh(&tpg->acl_node_lock); 493 } 494 spin_unlock_bh(&tpg->acl_node_lock); 495 496 return; 497 } 498 499 static struct se_port *core_alloc_port(struct se_device *dev) 500 { 501 struct se_port *port, *port_tmp; 502 503 port = kzalloc(sizeof(struct se_port), GFP_KERNEL); 504 if (!(port)) { 505 printk(KERN_ERR "Unable to allocate struct se_port\n"); 506 return NULL; 507 } 508 INIT_LIST_HEAD(&port->sep_alua_list); 509 INIT_LIST_HEAD(&port->sep_list); 510 atomic_set(&port->sep_tg_pt_secondary_offline, 0); 511 spin_lock_init(&port->sep_alua_lock); 512 mutex_init(&port->sep_tg_pt_md_mutex); 513 514 spin_lock(&dev->se_port_lock); 515 if (dev->dev_port_count == 0x0000ffff) { 516 printk(KERN_WARNING "Reached dev->dev_port_count ==" 517 " 0x0000ffff\n"); 518 spin_unlock(&dev->se_port_lock); 519 return NULL; 520 } 521 again: 522 /* 523 * Allocate the next RELATIVE TARGET PORT IDENTIFER for this struct se_device 524 * Here is the table from spc4r17 section 7.7.3.8. 525 * 526 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field 527 * 528 * Code Description 529 * 0h Reserved 530 * 1h Relative port 1, historically known as port A 531 * 2h Relative port 2, historically known as port B 532 * 3h to FFFFh Relative port 3 through 65 535 533 */ 534 port->sep_rtpi = dev->dev_rpti_counter++; 535 if (!(port->sep_rtpi)) 536 goto again; 537 538 list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) { 539 /* 540 * Make sure RELATIVE TARGET PORT IDENTIFER is unique 541 * for 16-bit wrap.. 542 */ 543 if (port->sep_rtpi == port_tmp->sep_rtpi) 544 goto again; 545 } 546 spin_unlock(&dev->se_port_lock); 547 548 return port; 549 } 550 551 static void core_export_port( 552 struct se_device *dev, 553 struct se_portal_group *tpg, 554 struct se_port *port, 555 struct se_lun *lun) 556 { 557 struct se_subsystem_dev *su_dev = SU_DEV(dev); 558 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL; 559 560 spin_lock(&dev->se_port_lock); 561 spin_lock(&lun->lun_sep_lock); 562 port->sep_tpg = tpg; 563 port->sep_lun = lun; 564 lun->lun_sep = port; 565 spin_unlock(&lun->lun_sep_lock); 566 567 list_add_tail(&port->sep_list, &dev->dev_sep_list); 568 spin_unlock(&dev->se_port_lock); 569 570 if (T10_ALUA(su_dev)->alua_type == SPC3_ALUA_EMULATED) { 571 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port); 572 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) { 573 printk(KERN_ERR "Unable to allocate t10_alua_tg_pt" 574 "_gp_member_t\n"); 575 return; 576 } 577 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 578 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem, 579 T10_ALUA(su_dev)->default_tg_pt_gp); 580 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 581 printk(KERN_INFO "%s/%s: Adding to default ALUA Target Port" 582 " Group: alua/default_tg_pt_gp\n", 583 TRANSPORT(dev)->name, TPG_TFO(tpg)->get_fabric_name()); 584 } 585 586 dev->dev_port_count++; 587 port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFER */ 588 } 589 590 /* 591 * Called with struct se_device->se_port_lock spinlock held. 592 */ 593 static void core_release_port(struct se_device *dev, struct se_port *port) 594 __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock) 595 { 596 /* 597 * Wait for any port reference for PR ALL_TG_PT=1 operation 598 * to complete in __core_scsi3_alloc_registration() 599 */ 600 spin_unlock(&dev->se_port_lock); 601 if (atomic_read(&port->sep_tg_pt_ref_cnt)) 602 cpu_relax(); 603 spin_lock(&dev->se_port_lock); 604 605 core_alua_free_tg_pt_gp_mem(port); 606 607 list_del(&port->sep_list); 608 dev->dev_port_count--; 609 kfree(port); 610 611 return; 612 } 613 614 int core_dev_export( 615 struct se_device *dev, 616 struct se_portal_group *tpg, 617 struct se_lun *lun) 618 { 619 struct se_port *port; 620 621 port = core_alloc_port(dev); 622 if (!(port)) 623 return -1; 624 625 lun->lun_se_dev = dev; 626 se_dev_start(dev); 627 628 atomic_inc(&dev->dev_export_obj.obj_access_count); 629 core_export_port(dev, tpg, port, lun); 630 return 0; 631 } 632 633 void core_dev_unexport( 634 struct se_device *dev, 635 struct se_portal_group *tpg, 636 struct se_lun *lun) 637 { 638 struct se_port *port = lun->lun_sep; 639 640 spin_lock(&lun->lun_sep_lock); 641 if (lun->lun_se_dev == NULL) { 642 spin_unlock(&lun->lun_sep_lock); 643 return; 644 } 645 spin_unlock(&lun->lun_sep_lock); 646 647 spin_lock(&dev->se_port_lock); 648 atomic_dec(&dev->dev_export_obj.obj_access_count); 649 core_release_port(dev, port); 650 spin_unlock(&dev->se_port_lock); 651 652 se_dev_stop(dev); 653 lun->lun_se_dev = NULL; 654 } 655 656 int transport_core_report_lun_response(struct se_cmd *se_cmd) 657 { 658 struct se_dev_entry *deve; 659 struct se_lun *se_lun; 660 struct se_session *se_sess = SE_SESS(se_cmd); 661 struct se_task *se_task; 662 unsigned char *buf = (unsigned char *)T_TASK(se_cmd)->t_task_buf; 663 u32 cdb_offset = 0, lun_count = 0, offset = 8, i; 664 665 list_for_each_entry(se_task, &T_TASK(se_cmd)->t_task_list, t_list) 666 break; 667 668 if (!(se_task)) { 669 printk(KERN_ERR "Unable to locate struct se_task for struct se_cmd\n"); 670 return PYX_TRANSPORT_LU_COMM_FAILURE; 671 } 672 673 /* 674 * If no struct se_session pointer is present, this struct se_cmd is 675 * coming via a target_core_mod PASSTHROUGH op, and not through 676 * a $FABRIC_MOD. In that case, report LUN=0 only. 677 */ 678 if (!(se_sess)) { 679 int_to_scsilun(0, (struct scsi_lun *)&buf[offset]); 680 lun_count = 1; 681 goto done; 682 } 683 684 spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); 685 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 686 deve = &SE_NODE_ACL(se_sess)->device_list[i]; 687 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 688 continue; 689 se_lun = deve->se_lun; 690 /* 691 * We determine the correct LUN LIST LENGTH even once we 692 * have reached the initial allocation length. 693 * See SPC2-R20 7.19. 694 */ 695 lun_count++; 696 if ((cdb_offset + 8) >= se_cmd->data_length) 697 continue; 698 699 int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]); 700 offset += 8; 701 cdb_offset += 8; 702 } 703 spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); 704 705 /* 706 * See SPC3 r07, page 159. 707 */ 708 done: 709 lun_count *= 8; 710 buf[0] = ((lun_count >> 24) & 0xff); 711 buf[1] = ((lun_count >> 16) & 0xff); 712 buf[2] = ((lun_count >> 8) & 0xff); 713 buf[3] = (lun_count & 0xff); 714 715 return PYX_TRANSPORT_SENT_TO_TRANSPORT; 716 } 717 718 /* se_release_device_for_hba(): 719 * 720 * 721 */ 722 void se_release_device_for_hba(struct se_device *dev) 723 { 724 struct se_hba *hba = dev->se_hba; 725 726 if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) || 727 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) || 728 (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) || 729 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) || 730 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED)) 731 se_dev_stop(dev); 732 733 if (dev->dev_ptr) { 734 kthread_stop(dev->process_thread); 735 if (dev->transport->free_device) 736 dev->transport->free_device(dev->dev_ptr); 737 } 738 739 spin_lock(&hba->device_lock); 740 list_del(&dev->dev_list); 741 hba->dev_count--; 742 spin_unlock(&hba->device_lock); 743 744 core_scsi3_free_all_registrations(dev); 745 se_release_vpd_for_dev(dev); 746 747 kfree(dev->dev_status_queue_obj); 748 kfree(dev->dev_queue_obj); 749 kfree(dev); 750 751 return; 752 } 753 754 void se_release_vpd_for_dev(struct se_device *dev) 755 { 756 struct t10_vpd *vpd, *vpd_tmp; 757 758 spin_lock(&DEV_T10_WWN(dev)->t10_vpd_lock); 759 list_for_each_entry_safe(vpd, vpd_tmp, 760 &DEV_T10_WWN(dev)->t10_vpd_list, vpd_list) { 761 list_del(&vpd->vpd_list); 762 kfree(vpd); 763 } 764 spin_unlock(&DEV_T10_WWN(dev)->t10_vpd_lock); 765 766 return; 767 } 768 769 /* se_free_virtual_device(): 770 * 771 * Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers. 772 */ 773 int se_free_virtual_device(struct se_device *dev, struct se_hba *hba) 774 { 775 if (!list_empty(&dev->dev_sep_list)) 776 dump_stack(); 777 778 core_alua_free_lu_gp_mem(dev); 779 se_release_device_for_hba(dev); 780 781 return 0; 782 } 783 784 static void se_dev_start(struct se_device *dev) 785 { 786 struct se_hba *hba = dev->se_hba; 787 788 spin_lock(&hba->device_lock); 789 atomic_inc(&dev->dev_obj.obj_access_count); 790 if (atomic_read(&dev->dev_obj.obj_access_count) == 1) { 791 if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) { 792 dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED; 793 dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED; 794 } else if (dev->dev_status & 795 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) { 796 dev->dev_status &= 797 ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED; 798 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED; 799 } 800 } 801 spin_unlock(&hba->device_lock); 802 } 803 804 static void se_dev_stop(struct se_device *dev) 805 { 806 struct se_hba *hba = dev->se_hba; 807 808 spin_lock(&hba->device_lock); 809 atomic_dec(&dev->dev_obj.obj_access_count); 810 if (atomic_read(&dev->dev_obj.obj_access_count) == 0) { 811 if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) { 812 dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED; 813 dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED; 814 } else if (dev->dev_status & 815 TRANSPORT_DEVICE_OFFLINE_ACTIVATED) { 816 dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED; 817 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED; 818 } 819 } 820 spin_unlock(&hba->device_lock); 821 } 822 823 int se_dev_check_online(struct se_device *dev) 824 { 825 int ret; 826 827 spin_lock_irq(&dev->dev_status_lock); 828 ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) || 829 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1; 830 spin_unlock_irq(&dev->dev_status_lock); 831 832 return ret; 833 } 834 835 int se_dev_check_shutdown(struct se_device *dev) 836 { 837 int ret; 838 839 spin_lock_irq(&dev->dev_status_lock); 840 ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN); 841 spin_unlock_irq(&dev->dev_status_lock); 842 843 return ret; 844 } 845 846 void se_dev_set_default_attribs( 847 struct se_device *dev, 848 struct se_dev_limits *dev_limits) 849 { 850 struct queue_limits *limits = &dev_limits->limits; 851 852 DEV_ATTRIB(dev)->emulate_dpo = DA_EMULATE_DPO; 853 DEV_ATTRIB(dev)->emulate_fua_write = DA_EMULATE_FUA_WRITE; 854 DEV_ATTRIB(dev)->emulate_fua_read = DA_EMULATE_FUA_READ; 855 DEV_ATTRIB(dev)->emulate_write_cache = DA_EMULATE_WRITE_CACHE; 856 DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL; 857 DEV_ATTRIB(dev)->emulate_tas = DA_EMULATE_TAS; 858 DEV_ATTRIB(dev)->emulate_tpu = DA_EMULATE_TPU; 859 DEV_ATTRIB(dev)->emulate_tpws = DA_EMULATE_TPWS; 860 DEV_ATTRIB(dev)->emulate_reservations = DA_EMULATE_RESERVATIONS; 861 DEV_ATTRIB(dev)->emulate_alua = DA_EMULATE_ALUA; 862 DEV_ATTRIB(dev)->enforce_pr_isids = DA_ENFORCE_PR_ISIDS; 863 /* 864 * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK 865 * iblock_create_virtdevice() from struct queue_limits values 866 * if blk_queue_discard()==1 867 */ 868 DEV_ATTRIB(dev)->max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT; 869 DEV_ATTRIB(dev)->max_unmap_block_desc_count = 870 DA_MAX_UNMAP_BLOCK_DESC_COUNT; 871 DEV_ATTRIB(dev)->unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT; 872 DEV_ATTRIB(dev)->unmap_granularity_alignment = 873 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT; 874 /* 875 * block_size is based on subsystem plugin dependent requirements. 876 */ 877 DEV_ATTRIB(dev)->hw_block_size = limits->logical_block_size; 878 DEV_ATTRIB(dev)->block_size = limits->logical_block_size; 879 /* 880 * max_sectors is based on subsystem plugin dependent requirements. 881 */ 882 DEV_ATTRIB(dev)->hw_max_sectors = limits->max_hw_sectors; 883 DEV_ATTRIB(dev)->max_sectors = limits->max_sectors; 884 /* 885 * Set optimal_sectors from max_sectors, which can be lowered via 886 * configfs. 887 */ 888 DEV_ATTRIB(dev)->optimal_sectors = limits->max_sectors; 889 /* 890 * queue_depth is based on subsystem plugin dependent requirements. 891 */ 892 DEV_ATTRIB(dev)->hw_queue_depth = dev_limits->hw_queue_depth; 893 DEV_ATTRIB(dev)->queue_depth = dev_limits->queue_depth; 894 } 895 896 int se_dev_set_task_timeout(struct se_device *dev, u32 task_timeout) 897 { 898 if (task_timeout > DA_TASK_TIMEOUT_MAX) { 899 printk(KERN_ERR "dev[%p]: Passed task_timeout: %u larger then" 900 " DA_TASK_TIMEOUT_MAX\n", dev, task_timeout); 901 return -1; 902 } else { 903 DEV_ATTRIB(dev)->task_timeout = task_timeout; 904 printk(KERN_INFO "dev[%p]: Set SE Device task_timeout: %u\n", 905 dev, task_timeout); 906 } 907 908 return 0; 909 } 910 911 int se_dev_set_max_unmap_lba_count( 912 struct se_device *dev, 913 u32 max_unmap_lba_count) 914 { 915 DEV_ATTRIB(dev)->max_unmap_lba_count = max_unmap_lba_count; 916 printk(KERN_INFO "dev[%p]: Set max_unmap_lba_count: %u\n", 917 dev, DEV_ATTRIB(dev)->max_unmap_lba_count); 918 return 0; 919 } 920 921 int se_dev_set_max_unmap_block_desc_count( 922 struct se_device *dev, 923 u32 max_unmap_block_desc_count) 924 { 925 DEV_ATTRIB(dev)->max_unmap_block_desc_count = max_unmap_block_desc_count; 926 printk(KERN_INFO "dev[%p]: Set max_unmap_block_desc_count: %u\n", 927 dev, DEV_ATTRIB(dev)->max_unmap_block_desc_count); 928 return 0; 929 } 930 931 int se_dev_set_unmap_granularity( 932 struct se_device *dev, 933 u32 unmap_granularity) 934 { 935 DEV_ATTRIB(dev)->unmap_granularity = unmap_granularity; 936 printk(KERN_INFO "dev[%p]: Set unmap_granularity: %u\n", 937 dev, DEV_ATTRIB(dev)->unmap_granularity); 938 return 0; 939 } 940 941 int se_dev_set_unmap_granularity_alignment( 942 struct se_device *dev, 943 u32 unmap_granularity_alignment) 944 { 945 DEV_ATTRIB(dev)->unmap_granularity_alignment = unmap_granularity_alignment; 946 printk(KERN_INFO "dev[%p]: Set unmap_granularity_alignment: %u\n", 947 dev, DEV_ATTRIB(dev)->unmap_granularity_alignment); 948 return 0; 949 } 950 951 int se_dev_set_emulate_dpo(struct se_device *dev, int flag) 952 { 953 if ((flag != 0) && (flag != 1)) { 954 printk(KERN_ERR "Illegal value %d\n", flag); 955 return -1; 956 } 957 if (TRANSPORT(dev)->dpo_emulated == NULL) { 958 printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated is NULL\n"); 959 return -1; 960 } 961 if (TRANSPORT(dev)->dpo_emulated(dev) == 0) { 962 printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated not supported\n"); 963 return -1; 964 } 965 DEV_ATTRIB(dev)->emulate_dpo = flag; 966 printk(KERN_INFO "dev[%p]: SE Device Page Out (DPO) Emulation" 967 " bit: %d\n", dev, DEV_ATTRIB(dev)->emulate_dpo); 968 return 0; 969 } 970 971 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag) 972 { 973 if ((flag != 0) && (flag != 1)) { 974 printk(KERN_ERR "Illegal value %d\n", flag); 975 return -1; 976 } 977 if (TRANSPORT(dev)->fua_write_emulated == NULL) { 978 printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated is NULL\n"); 979 return -1; 980 } 981 if (TRANSPORT(dev)->fua_write_emulated(dev) == 0) { 982 printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated not supported\n"); 983 return -1; 984 } 985 DEV_ATTRIB(dev)->emulate_fua_write = flag; 986 printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access WRITEs: %d\n", 987 dev, DEV_ATTRIB(dev)->emulate_fua_write); 988 return 0; 989 } 990 991 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag) 992 { 993 if ((flag != 0) && (flag != 1)) { 994 printk(KERN_ERR "Illegal value %d\n", flag); 995 return -1; 996 } 997 if (TRANSPORT(dev)->fua_read_emulated == NULL) { 998 printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated is NULL\n"); 999 return -1; 1000 } 1001 if (TRANSPORT(dev)->fua_read_emulated(dev) == 0) { 1002 printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated not supported\n"); 1003 return -1; 1004 } 1005 DEV_ATTRIB(dev)->emulate_fua_read = flag; 1006 printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access READs: %d\n", 1007 dev, DEV_ATTRIB(dev)->emulate_fua_read); 1008 return 0; 1009 } 1010 1011 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag) 1012 { 1013 if ((flag != 0) && (flag != 1)) { 1014 printk(KERN_ERR "Illegal value %d\n", flag); 1015 return -1; 1016 } 1017 if (TRANSPORT(dev)->write_cache_emulated == NULL) { 1018 printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated is NULL\n"); 1019 return -1; 1020 } 1021 if (TRANSPORT(dev)->write_cache_emulated(dev) == 0) { 1022 printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated not supported\n"); 1023 return -1; 1024 } 1025 DEV_ATTRIB(dev)->emulate_write_cache = flag; 1026 printk(KERN_INFO "dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 1027 dev, DEV_ATTRIB(dev)->emulate_write_cache); 1028 return 0; 1029 } 1030 1031 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag) 1032 { 1033 if ((flag != 0) && (flag != 1) && (flag != 2)) { 1034 printk(KERN_ERR "Illegal value %d\n", flag); 1035 return -1; 1036 } 1037 1038 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1039 printk(KERN_ERR "dev[%p]: Unable to change SE Device" 1040 " UA_INTRLCK_CTRL while dev_export_obj: %d count" 1041 " exists\n", dev, 1042 atomic_read(&dev->dev_export_obj.obj_access_count)); 1043 return -1; 1044 } 1045 DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = flag; 1046 printk(KERN_INFO "dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 1047 dev, DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl); 1048 1049 return 0; 1050 } 1051 1052 int se_dev_set_emulate_tas(struct se_device *dev, int flag) 1053 { 1054 if ((flag != 0) && (flag != 1)) { 1055 printk(KERN_ERR "Illegal value %d\n", flag); 1056 return -1; 1057 } 1058 1059 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1060 printk(KERN_ERR "dev[%p]: Unable to change SE Device TAS while" 1061 " dev_export_obj: %d count exists\n", dev, 1062 atomic_read(&dev->dev_export_obj.obj_access_count)); 1063 return -1; 1064 } 1065 DEV_ATTRIB(dev)->emulate_tas = flag; 1066 printk(KERN_INFO "dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 1067 dev, (DEV_ATTRIB(dev)->emulate_tas) ? "Enabled" : "Disabled"); 1068 1069 return 0; 1070 } 1071 1072 int se_dev_set_emulate_tpu(struct se_device *dev, int flag) 1073 { 1074 if ((flag != 0) && (flag != 1)) { 1075 printk(KERN_ERR "Illegal value %d\n", flag); 1076 return -1; 1077 } 1078 /* 1079 * We expect this value to be non-zero when generic Block Layer 1080 * Discard supported is detected iblock_create_virtdevice(). 1081 */ 1082 if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) { 1083 printk(KERN_ERR "Generic Block Discard not supported\n"); 1084 return -ENOSYS; 1085 } 1086 1087 DEV_ATTRIB(dev)->emulate_tpu = flag; 1088 printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 1089 dev, flag); 1090 return 0; 1091 } 1092 1093 int se_dev_set_emulate_tpws(struct se_device *dev, int flag) 1094 { 1095 if ((flag != 0) && (flag != 1)) { 1096 printk(KERN_ERR "Illegal value %d\n", flag); 1097 return -1; 1098 } 1099 /* 1100 * We expect this value to be non-zero when generic Block Layer 1101 * Discard supported is detected iblock_create_virtdevice(). 1102 */ 1103 if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) { 1104 printk(KERN_ERR "Generic Block Discard not supported\n"); 1105 return -ENOSYS; 1106 } 1107 1108 DEV_ATTRIB(dev)->emulate_tpws = flag; 1109 printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 1110 dev, flag); 1111 return 0; 1112 } 1113 1114 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag) 1115 { 1116 if ((flag != 0) && (flag != 1)) { 1117 printk(KERN_ERR "Illegal value %d\n", flag); 1118 return -1; 1119 } 1120 DEV_ATTRIB(dev)->enforce_pr_isids = flag; 1121 printk(KERN_INFO "dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev, 1122 (DEV_ATTRIB(dev)->enforce_pr_isids) ? "Enabled" : "Disabled"); 1123 return 0; 1124 } 1125 1126 /* 1127 * Note, this can only be called on unexported SE Device Object. 1128 */ 1129 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth) 1130 { 1131 u32 orig_queue_depth = dev->queue_depth; 1132 1133 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1134 printk(KERN_ERR "dev[%p]: Unable to change SE Device TCQ while" 1135 " dev_export_obj: %d count exists\n", dev, 1136 atomic_read(&dev->dev_export_obj.obj_access_count)); 1137 return -1; 1138 } 1139 if (!(queue_depth)) { 1140 printk(KERN_ERR "dev[%p]: Illegal ZERO value for queue" 1141 "_depth\n", dev); 1142 return -1; 1143 } 1144 1145 if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1146 if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) { 1147 printk(KERN_ERR "dev[%p]: Passed queue_depth: %u" 1148 " exceeds TCM/SE_Device TCQ: %u\n", 1149 dev, queue_depth, 1150 DEV_ATTRIB(dev)->hw_queue_depth); 1151 return -1; 1152 } 1153 } else { 1154 if (queue_depth > DEV_ATTRIB(dev)->queue_depth) { 1155 if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) { 1156 printk(KERN_ERR "dev[%p]: Passed queue_depth:" 1157 " %u exceeds TCM/SE_Device MAX" 1158 " TCQ: %u\n", dev, queue_depth, 1159 DEV_ATTRIB(dev)->hw_queue_depth); 1160 return -1; 1161 } 1162 } 1163 } 1164 1165 DEV_ATTRIB(dev)->queue_depth = dev->queue_depth = queue_depth; 1166 if (queue_depth > orig_queue_depth) 1167 atomic_add(queue_depth - orig_queue_depth, &dev->depth_left); 1168 else if (queue_depth < orig_queue_depth) 1169 atomic_sub(orig_queue_depth - queue_depth, &dev->depth_left); 1170 1171 printk(KERN_INFO "dev[%p]: SE Device TCQ Depth changed to: %u\n", 1172 dev, queue_depth); 1173 return 0; 1174 } 1175 1176 int se_dev_set_max_sectors(struct se_device *dev, u32 max_sectors) 1177 { 1178 int force = 0; /* Force setting for VDEVS */ 1179 1180 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1181 printk(KERN_ERR "dev[%p]: Unable to change SE Device" 1182 " max_sectors while dev_export_obj: %d count exists\n", 1183 dev, atomic_read(&dev->dev_export_obj.obj_access_count)); 1184 return -1; 1185 } 1186 if (!(max_sectors)) { 1187 printk(KERN_ERR "dev[%p]: Illegal ZERO value for" 1188 " max_sectors\n", dev); 1189 return -1; 1190 } 1191 if (max_sectors < DA_STATUS_MAX_SECTORS_MIN) { 1192 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u less than" 1193 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, max_sectors, 1194 DA_STATUS_MAX_SECTORS_MIN); 1195 return -1; 1196 } 1197 if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1198 if (max_sectors > DEV_ATTRIB(dev)->hw_max_sectors) { 1199 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u" 1200 " greater than TCM/SE_Device max_sectors:" 1201 " %u\n", dev, max_sectors, 1202 DEV_ATTRIB(dev)->hw_max_sectors); 1203 return -1; 1204 } 1205 } else { 1206 if (!(force) && (max_sectors > 1207 DEV_ATTRIB(dev)->hw_max_sectors)) { 1208 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u" 1209 " greater than TCM/SE_Device max_sectors" 1210 ": %u, use force=1 to override.\n", dev, 1211 max_sectors, DEV_ATTRIB(dev)->hw_max_sectors); 1212 return -1; 1213 } 1214 if (max_sectors > DA_STATUS_MAX_SECTORS_MAX) { 1215 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u" 1216 " greater than DA_STATUS_MAX_SECTORS_MAX:" 1217 " %u\n", dev, max_sectors, 1218 DA_STATUS_MAX_SECTORS_MAX); 1219 return -1; 1220 } 1221 } 1222 1223 DEV_ATTRIB(dev)->max_sectors = max_sectors; 1224 printk("dev[%p]: SE Device max_sectors changed to %u\n", 1225 dev, max_sectors); 1226 return 0; 1227 } 1228 1229 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors) 1230 { 1231 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1232 printk(KERN_ERR "dev[%p]: Unable to change SE Device" 1233 " optimal_sectors while dev_export_obj: %d count exists\n", 1234 dev, atomic_read(&dev->dev_export_obj.obj_access_count)); 1235 return -EINVAL; 1236 } 1237 if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1238 printk(KERN_ERR "dev[%p]: Passed optimal_sectors cannot be" 1239 " changed for TCM/pSCSI\n", dev); 1240 return -EINVAL; 1241 } 1242 if (optimal_sectors > DEV_ATTRIB(dev)->max_sectors) { 1243 printk(KERN_ERR "dev[%p]: Passed optimal_sectors %u cannot be" 1244 " greater than max_sectors: %u\n", dev, 1245 optimal_sectors, DEV_ATTRIB(dev)->max_sectors); 1246 return -EINVAL; 1247 } 1248 1249 DEV_ATTRIB(dev)->optimal_sectors = optimal_sectors; 1250 printk(KERN_INFO "dev[%p]: SE Device optimal_sectors changed to %u\n", 1251 dev, optimal_sectors); 1252 return 0; 1253 } 1254 1255 int se_dev_set_block_size(struct se_device *dev, u32 block_size) 1256 { 1257 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1258 printk(KERN_ERR "dev[%p]: Unable to change SE Device block_size" 1259 " while dev_export_obj: %d count exists\n", dev, 1260 atomic_read(&dev->dev_export_obj.obj_access_count)); 1261 return -1; 1262 } 1263 1264 if ((block_size != 512) && 1265 (block_size != 1024) && 1266 (block_size != 2048) && 1267 (block_size != 4096)) { 1268 printk(KERN_ERR "dev[%p]: Illegal value for block_device: %u" 1269 " for SE device, must be 512, 1024, 2048 or 4096\n", 1270 dev, block_size); 1271 return -1; 1272 } 1273 1274 if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1275 printk(KERN_ERR "dev[%p]: Not allowed to change block_size for" 1276 " Physical Device, use for Linux/SCSI to change" 1277 " block_size for underlying hardware\n", dev); 1278 return -1; 1279 } 1280 1281 DEV_ATTRIB(dev)->block_size = block_size; 1282 printk(KERN_INFO "dev[%p]: SE Device block_size changed to %u\n", 1283 dev, block_size); 1284 return 0; 1285 } 1286 1287 struct se_lun *core_dev_add_lun( 1288 struct se_portal_group *tpg, 1289 struct se_hba *hba, 1290 struct se_device *dev, 1291 u32 lun) 1292 { 1293 struct se_lun *lun_p; 1294 u32 lun_access = 0; 1295 1296 if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) { 1297 printk(KERN_ERR "Unable to export struct se_device while dev_access_obj: %d\n", 1298 atomic_read(&dev->dev_access_obj.obj_access_count)); 1299 return NULL; 1300 } 1301 1302 lun_p = core_tpg_pre_addlun(tpg, lun); 1303 if ((IS_ERR(lun_p)) || !(lun_p)) 1304 return NULL; 1305 1306 if (dev->dev_flags & DF_READ_ONLY) 1307 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; 1308 else 1309 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE; 1310 1311 if (core_tpg_post_addlun(tpg, lun_p, lun_access, dev) < 0) 1312 return NULL; 1313 1314 printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from" 1315 " CORE HBA: %u\n", TPG_TFO(tpg)->get_fabric_name(), 1316 TPG_TFO(tpg)->tpg_get_tag(tpg), lun_p->unpacked_lun, 1317 TPG_TFO(tpg)->get_fabric_name(), hba->hba_id); 1318 /* 1319 * Update LUN maps for dynamically added initiators when 1320 * generate_node_acl is enabled. 1321 */ 1322 if (TPG_TFO(tpg)->tpg_check_demo_mode(tpg)) { 1323 struct se_node_acl *acl; 1324 spin_lock_bh(&tpg->acl_node_lock); 1325 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { 1326 if (acl->dynamic_node_acl) { 1327 spin_unlock_bh(&tpg->acl_node_lock); 1328 core_tpg_add_node_to_devs(acl, tpg); 1329 spin_lock_bh(&tpg->acl_node_lock); 1330 } 1331 } 1332 spin_unlock_bh(&tpg->acl_node_lock); 1333 } 1334 1335 return lun_p; 1336 } 1337 1338 /* core_dev_del_lun(): 1339 * 1340 * 1341 */ 1342 int core_dev_del_lun( 1343 struct se_portal_group *tpg, 1344 u32 unpacked_lun) 1345 { 1346 struct se_lun *lun; 1347 int ret = 0; 1348 1349 lun = core_tpg_pre_dellun(tpg, unpacked_lun, &ret); 1350 if (!(lun)) 1351 return ret; 1352 1353 core_tpg_post_dellun(tpg, lun); 1354 1355 printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from" 1356 " device object\n", TPG_TFO(tpg)->get_fabric_name(), 1357 TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun, 1358 TPG_TFO(tpg)->get_fabric_name()); 1359 1360 return 0; 1361 } 1362 1363 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun) 1364 { 1365 struct se_lun *lun; 1366 1367 spin_lock(&tpg->tpg_lun_lock); 1368 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1369 printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS" 1370 "_PER_TPG-1: %u for Target Portal Group: %hu\n", 1371 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, 1372 TRANSPORT_MAX_LUNS_PER_TPG-1, 1373 TPG_TFO(tpg)->tpg_get_tag(tpg)); 1374 spin_unlock(&tpg->tpg_lun_lock); 1375 return NULL; 1376 } 1377 lun = &tpg->tpg_lun_list[unpacked_lun]; 1378 1379 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) { 1380 printk(KERN_ERR "%s Logical Unit Number: %u is not free on" 1381 " Target Portal Group: %hu, ignoring request.\n", 1382 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, 1383 TPG_TFO(tpg)->tpg_get_tag(tpg)); 1384 spin_unlock(&tpg->tpg_lun_lock); 1385 return NULL; 1386 } 1387 spin_unlock(&tpg->tpg_lun_lock); 1388 1389 return lun; 1390 } 1391 1392 /* core_dev_get_lun(): 1393 * 1394 * 1395 */ 1396 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun) 1397 { 1398 struct se_lun *lun; 1399 1400 spin_lock(&tpg->tpg_lun_lock); 1401 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1402 printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER" 1403 "_TPG-1: %u for Target Portal Group: %hu\n", 1404 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, 1405 TRANSPORT_MAX_LUNS_PER_TPG-1, 1406 TPG_TFO(tpg)->tpg_get_tag(tpg)); 1407 spin_unlock(&tpg->tpg_lun_lock); 1408 return NULL; 1409 } 1410 lun = &tpg->tpg_lun_list[unpacked_lun]; 1411 1412 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { 1413 printk(KERN_ERR "%s Logical Unit Number: %u is not active on" 1414 " Target Portal Group: %hu, ignoring request.\n", 1415 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, 1416 TPG_TFO(tpg)->tpg_get_tag(tpg)); 1417 spin_unlock(&tpg->tpg_lun_lock); 1418 return NULL; 1419 } 1420 spin_unlock(&tpg->tpg_lun_lock); 1421 1422 return lun; 1423 } 1424 1425 struct se_lun_acl *core_dev_init_initiator_node_lun_acl( 1426 struct se_portal_group *tpg, 1427 u32 mapped_lun, 1428 char *initiatorname, 1429 int *ret) 1430 { 1431 struct se_lun_acl *lacl; 1432 struct se_node_acl *nacl; 1433 1434 if (strlen(initiatorname) >= TRANSPORT_IQN_LEN) { 1435 printk(KERN_ERR "%s InitiatorName exceeds maximum size.\n", 1436 TPG_TFO(tpg)->get_fabric_name()); 1437 *ret = -EOVERFLOW; 1438 return NULL; 1439 } 1440 nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname); 1441 if (!(nacl)) { 1442 *ret = -EINVAL; 1443 return NULL; 1444 } 1445 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL); 1446 if (!(lacl)) { 1447 printk(KERN_ERR "Unable to allocate memory for struct se_lun_acl.\n"); 1448 *ret = -ENOMEM; 1449 return NULL; 1450 } 1451 1452 INIT_LIST_HEAD(&lacl->lacl_list); 1453 lacl->mapped_lun = mapped_lun; 1454 lacl->se_lun_nacl = nacl; 1455 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); 1456 1457 return lacl; 1458 } 1459 1460 int core_dev_add_initiator_node_lun_acl( 1461 struct se_portal_group *tpg, 1462 struct se_lun_acl *lacl, 1463 u32 unpacked_lun, 1464 u32 lun_access) 1465 { 1466 struct se_lun *lun; 1467 struct se_node_acl *nacl; 1468 1469 lun = core_dev_get_lun(tpg, unpacked_lun); 1470 if (!(lun)) { 1471 printk(KERN_ERR "%s Logical Unit Number: %u is not active on" 1472 " Target Portal Group: %hu, ignoring request.\n", 1473 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, 1474 TPG_TFO(tpg)->tpg_get_tag(tpg)); 1475 return -EINVAL; 1476 } 1477 1478 nacl = lacl->se_lun_nacl; 1479 if (!(nacl)) 1480 return -EINVAL; 1481 1482 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) && 1483 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE)) 1484 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; 1485 1486 lacl->se_lun = lun; 1487 1488 if (core_update_device_list_for_node(lun, lacl, lacl->mapped_lun, 1489 lun_access, nacl, tpg, 1) < 0) 1490 return -EINVAL; 1491 1492 spin_lock(&lun->lun_acl_lock); 1493 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list); 1494 atomic_inc(&lun->lun_acl_count); 1495 smp_mb__after_atomic_inc(); 1496 spin_unlock(&lun->lun_acl_lock); 1497 1498 printk(KERN_INFO "%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for " 1499 " InitiatorNode: %s\n", TPG_TFO(tpg)->get_fabric_name(), 1500 TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun, 1501 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO", 1502 lacl->initiatorname); 1503 /* 1504 * Check to see if there are any existing persistent reservation APTPL 1505 * pre-registrations that need to be enabled for this LUN ACL.. 1506 */ 1507 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl); 1508 return 0; 1509 } 1510 1511 /* core_dev_del_initiator_node_lun_acl(): 1512 * 1513 * 1514 */ 1515 int core_dev_del_initiator_node_lun_acl( 1516 struct se_portal_group *tpg, 1517 struct se_lun *lun, 1518 struct se_lun_acl *lacl) 1519 { 1520 struct se_node_acl *nacl; 1521 1522 nacl = lacl->se_lun_nacl; 1523 if (!(nacl)) 1524 return -EINVAL; 1525 1526 spin_lock(&lun->lun_acl_lock); 1527 list_del(&lacl->lacl_list); 1528 atomic_dec(&lun->lun_acl_count); 1529 smp_mb__after_atomic_dec(); 1530 spin_unlock(&lun->lun_acl_lock); 1531 1532 core_update_device_list_for_node(lun, NULL, lacl->mapped_lun, 1533 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0); 1534 1535 lacl->se_lun = NULL; 1536 1537 printk(KERN_INFO "%s_TPG[%hu]_LUN[%u] - Removed ACL for" 1538 " InitiatorNode: %s Mapped LUN: %u\n", 1539 TPG_TFO(tpg)->get_fabric_name(), 1540 TPG_TFO(tpg)->tpg_get_tag(tpg), lun->unpacked_lun, 1541 lacl->initiatorname, lacl->mapped_lun); 1542 1543 return 0; 1544 } 1545 1546 void core_dev_free_initiator_node_lun_acl( 1547 struct se_portal_group *tpg, 1548 struct se_lun_acl *lacl) 1549 { 1550 printk("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s" 1551 " Mapped LUN: %u\n", TPG_TFO(tpg)->get_fabric_name(), 1552 TPG_TFO(tpg)->tpg_get_tag(tpg), 1553 TPG_TFO(tpg)->get_fabric_name(), 1554 lacl->initiatorname, lacl->mapped_lun); 1555 1556 kfree(lacl); 1557 } 1558 1559 int core_dev_setup_virtual_lun0(void) 1560 { 1561 struct se_hba *hba; 1562 struct se_device *dev; 1563 struct se_subsystem_dev *se_dev = NULL; 1564 struct se_subsystem_api *t; 1565 char buf[16]; 1566 int ret; 1567 1568 hba = core_alloc_hba("rd_dr", 0, HBA_FLAGS_INTERNAL_USE); 1569 if (IS_ERR(hba)) 1570 return PTR_ERR(hba); 1571 1572 se_global->g_lun0_hba = hba; 1573 t = hba->transport; 1574 1575 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL); 1576 if (!(se_dev)) { 1577 printk(KERN_ERR "Unable to allocate memory for" 1578 " struct se_subsystem_dev\n"); 1579 ret = -ENOMEM; 1580 goto out; 1581 } 1582 INIT_LIST_HEAD(&se_dev->g_se_dev_list); 1583 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list); 1584 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock); 1585 INIT_LIST_HEAD(&se_dev->t10_reservation.registration_list); 1586 INIT_LIST_HEAD(&se_dev->t10_reservation.aptpl_reg_list); 1587 spin_lock_init(&se_dev->t10_reservation.registration_lock); 1588 spin_lock_init(&se_dev->t10_reservation.aptpl_reg_lock); 1589 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list); 1590 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock); 1591 spin_lock_init(&se_dev->se_dev_lock); 1592 se_dev->t10_reservation.pr_aptpl_buf_len = PR_APTPL_BUF_LEN; 1593 se_dev->t10_wwn.t10_sub_dev = se_dev; 1594 se_dev->t10_alua.t10_sub_dev = se_dev; 1595 se_dev->se_dev_attrib.da_sub_dev = se_dev; 1596 se_dev->se_dev_hba = hba; 1597 1598 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0"); 1599 if (!(se_dev->se_dev_su_ptr)) { 1600 printk(KERN_ERR "Unable to locate subsystem dependent pointer" 1601 " from allocate_virtdevice()\n"); 1602 ret = -ENOMEM; 1603 goto out; 1604 } 1605 se_global->g_lun0_su_dev = se_dev; 1606 1607 memset(buf, 0, 16); 1608 sprintf(buf, "rd_pages=8"); 1609 t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf)); 1610 1611 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr); 1612 if (!(dev) || IS_ERR(dev)) { 1613 ret = -ENOMEM; 1614 goto out; 1615 } 1616 se_dev->se_dev_ptr = dev; 1617 se_global->g_lun0_dev = dev; 1618 1619 return 0; 1620 out: 1621 se_global->g_lun0_su_dev = NULL; 1622 kfree(se_dev); 1623 if (se_global->g_lun0_hba) { 1624 core_delete_hba(se_global->g_lun0_hba); 1625 se_global->g_lun0_hba = NULL; 1626 } 1627 return ret; 1628 } 1629 1630 1631 void core_dev_release_virtual_lun0(void) 1632 { 1633 struct se_hba *hba = se_global->g_lun0_hba; 1634 struct se_subsystem_dev *su_dev = se_global->g_lun0_su_dev; 1635 1636 if (!(hba)) 1637 return; 1638 1639 if (se_global->g_lun0_dev) 1640 se_free_virtual_device(se_global->g_lun0_dev, hba); 1641 1642 kfree(su_dev); 1643 core_delete_hba(hba); 1644 } 1645