1 /******************************************************************************* 2 * Filename: target_core_device.c (based on iscsi_target_device.c) 3 * 4 * This file contains the iSCSI Virtual Device and Disk Transport 5 * agnostic related functions. 6 * 7 * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc. 8 * Copyright (c) 2005-2006 SBE, Inc. All Rights Reserved. 9 * Copyright (c) 2007-2010 Rising Tide Systems 10 * Copyright (c) 2008-2010 Linux-iSCSI.org 11 * 12 * Nicholas A. Bellinger <nab@kernel.org> 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License as published by 16 * the Free Software Foundation; either version 2 of the License, or 17 * (at your option) any later version. 18 * 19 * This program is distributed in the hope that it will be useful, 20 * but WITHOUT ANY WARRANTY; without even the implied warranty of 21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 22 * GNU General Public License for more details. 23 * 24 * You should have received a copy of the GNU General Public License 25 * along with this program; if not, write to the Free Software 26 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 27 * 28 ******************************************************************************/ 29 30 #include <linux/net.h> 31 #include <linux/string.h> 32 #include <linux/delay.h> 33 #include <linux/timer.h> 34 #include <linux/slab.h> 35 #include <linux/spinlock.h> 36 #include <linux/smp_lock.h> 37 #include <linux/kthread.h> 38 #include <linux/in.h> 39 #include <net/sock.h> 40 #include <net/tcp.h> 41 #include <scsi/scsi.h> 42 43 #include <target/target_core_base.h> 44 #include <target/target_core_device.h> 45 #include <target/target_core_tpg.h> 46 #include <target/target_core_transport.h> 47 #include <target/target_core_fabric_ops.h> 48 49 #include "target_core_alua.h" 50 #include "target_core_hba.h" 51 #include "target_core_pr.h" 52 #include "target_core_ua.h" 53 54 static void se_dev_start(struct se_device *dev); 55 static void se_dev_stop(struct se_device *dev); 56 57 int transport_get_lun_for_cmd( 58 struct se_cmd *se_cmd, 59 unsigned char *cdb, 60 u32 unpacked_lun) 61 { 62 struct se_dev_entry *deve; 63 struct se_lun *se_lun = NULL; 64 struct se_session *se_sess = SE_SESS(se_cmd); 65 unsigned long flags; 66 int read_only = 0; 67 68 spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); 69 deve = se_cmd->se_deve = 70 &SE_NODE_ACL(se_sess)->device_list[unpacked_lun]; 71 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 72 if (se_cmd) { 73 deve->total_cmds++; 74 deve->total_bytes += se_cmd->data_length; 75 76 if (se_cmd->data_direction == DMA_TO_DEVICE) { 77 if (deve->lun_flags & 78 TRANSPORT_LUNFLAGS_READ_ONLY) { 79 read_only = 1; 80 goto out; 81 } 82 deve->write_bytes += se_cmd->data_length; 83 } else if (se_cmd->data_direction == 84 DMA_FROM_DEVICE) { 85 deve->read_bytes += se_cmd->data_length; 86 } 87 } 88 deve->deve_cmds++; 89 90 se_lun = se_cmd->se_lun = deve->se_lun; 91 se_cmd->pr_res_key = deve->pr_res_key; 92 se_cmd->orig_fe_lun = unpacked_lun; 93 se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev; 94 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; 95 } 96 out: 97 spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); 98 99 if (!se_lun) { 100 if (read_only) { 101 se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED; 102 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 103 printk("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN" 104 " Access for 0x%08x\n", 105 CMD_TFO(se_cmd)->get_fabric_name(), 106 unpacked_lun); 107 return -1; 108 } else { 109 /* 110 * Use the se_portal_group->tpg_virt_lun0 to allow for 111 * REPORT_LUNS, et al to be returned when no active 112 * MappedLUN=0 exists for this Initiator Port. 113 */ 114 if (unpacked_lun != 0) { 115 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN; 116 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 117 printk("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" 118 " Access for 0x%08x\n", 119 CMD_TFO(se_cmd)->get_fabric_name(), 120 unpacked_lun); 121 return -1; 122 } 123 /* 124 * Force WRITE PROTECT for virtual LUN 0 125 */ 126 if ((se_cmd->data_direction != DMA_FROM_DEVICE) && 127 (se_cmd->data_direction != DMA_NONE)) { 128 se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED; 129 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 130 return -1; 131 } 132 #if 0 133 printk("TARGET_CORE[%s]: Using virtual LUN0! :-)\n", 134 CMD_TFO(se_cmd)->get_fabric_name()); 135 #endif 136 se_lun = se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0; 137 se_cmd->orig_fe_lun = 0; 138 se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev; 139 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; 140 } 141 } 142 /* 143 * Determine if the struct se_lun is online. 144 */ 145 /* #warning FIXME: Check for LUN_RESET + UNIT Attention */ 146 if (se_dev_check_online(se_lun->lun_se_dev) != 0) { 147 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN; 148 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 149 return -1; 150 } 151 152 { 153 struct se_device *dev = se_lun->lun_se_dev; 154 spin_lock(&dev->stats_lock); 155 dev->num_cmds++; 156 if (se_cmd->data_direction == DMA_TO_DEVICE) 157 dev->write_bytes += se_cmd->data_length; 158 else if (se_cmd->data_direction == DMA_FROM_DEVICE) 159 dev->read_bytes += se_cmd->data_length; 160 spin_unlock(&dev->stats_lock); 161 } 162 163 /* 164 * Add the iscsi_cmd_t to the struct se_lun's cmd list. This list is used 165 * for tracking state of struct se_cmds during LUN shutdown events. 166 */ 167 spin_lock_irqsave(&se_lun->lun_cmd_lock, flags); 168 list_add_tail(&se_cmd->se_lun_list, &se_lun->lun_cmd_list); 169 atomic_set(&T_TASK(se_cmd)->transport_lun_active, 1); 170 #if 0 171 printk(KERN_INFO "Adding ITT: 0x%08x to LUN LIST[%d]\n", 172 CMD_TFO(se_cmd)->get_task_tag(se_cmd), se_lun->unpacked_lun); 173 #endif 174 spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags); 175 176 return 0; 177 } 178 EXPORT_SYMBOL(transport_get_lun_for_cmd); 179 180 int transport_get_lun_for_tmr( 181 struct se_cmd *se_cmd, 182 u32 unpacked_lun) 183 { 184 struct se_device *dev = NULL; 185 struct se_dev_entry *deve; 186 struct se_lun *se_lun = NULL; 187 struct se_session *se_sess = SE_SESS(se_cmd); 188 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req; 189 190 spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); 191 deve = se_cmd->se_deve = 192 &SE_NODE_ACL(se_sess)->device_list[unpacked_lun]; 193 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { 194 se_lun = se_cmd->se_lun = se_tmr->tmr_lun = deve->se_lun; 195 dev = se_tmr->tmr_dev = se_lun->lun_se_dev; 196 se_cmd->pr_res_key = deve->pr_res_key; 197 se_cmd->orig_fe_lun = unpacked_lun; 198 se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev; 199 /* se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; */ 200 } 201 spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); 202 203 if (!se_lun) { 204 printk(KERN_INFO "TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" 205 " Access for 0x%08x\n", 206 CMD_TFO(se_cmd)->get_fabric_name(), 207 unpacked_lun); 208 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 209 return -1; 210 } 211 /* 212 * Determine if the struct se_lun is online. 213 */ 214 /* #warning FIXME: Check for LUN_RESET + UNIT Attention */ 215 if (se_dev_check_online(se_lun->lun_se_dev) != 0) { 216 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 217 return -1; 218 } 219 220 spin_lock(&dev->se_tmr_lock); 221 list_add_tail(&se_tmr->tmr_list, &dev->dev_tmr_list); 222 spin_unlock(&dev->se_tmr_lock); 223 224 return 0; 225 } 226 EXPORT_SYMBOL(transport_get_lun_for_tmr); 227 228 /* 229 * This function is called from core_scsi3_emulate_pro_register_and_move() 230 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count 231 * when a matching rtpi is found. 232 */ 233 struct se_dev_entry *core_get_se_deve_from_rtpi( 234 struct se_node_acl *nacl, 235 u16 rtpi) 236 { 237 struct se_dev_entry *deve; 238 struct se_lun *lun; 239 struct se_port *port; 240 struct se_portal_group *tpg = nacl->se_tpg; 241 u32 i; 242 243 spin_lock_irq(&nacl->device_list_lock); 244 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 245 deve = &nacl->device_list[i]; 246 247 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 248 continue; 249 250 lun = deve->se_lun; 251 if (!(lun)) { 252 printk(KERN_ERR "%s device entries device pointer is" 253 " NULL, but Initiator has access.\n", 254 TPG_TFO(tpg)->get_fabric_name()); 255 continue; 256 } 257 port = lun->lun_sep; 258 if (!(port)) { 259 printk(KERN_ERR "%s device entries device pointer is" 260 " NULL, but Initiator has access.\n", 261 TPG_TFO(tpg)->get_fabric_name()); 262 continue; 263 } 264 if (port->sep_rtpi != rtpi) 265 continue; 266 267 atomic_inc(&deve->pr_ref_count); 268 smp_mb__after_atomic_inc(); 269 spin_unlock_irq(&nacl->device_list_lock); 270 271 return deve; 272 } 273 spin_unlock_irq(&nacl->device_list_lock); 274 275 return NULL; 276 } 277 278 int core_free_device_list_for_node( 279 struct se_node_acl *nacl, 280 struct se_portal_group *tpg) 281 { 282 struct se_dev_entry *deve; 283 struct se_lun *lun; 284 u32 i; 285 286 if (!nacl->device_list) 287 return 0; 288 289 spin_lock_irq(&nacl->device_list_lock); 290 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 291 deve = &nacl->device_list[i]; 292 293 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 294 continue; 295 296 if (!deve->se_lun) { 297 printk(KERN_ERR "%s device entries device pointer is" 298 " NULL, but Initiator has access.\n", 299 TPG_TFO(tpg)->get_fabric_name()); 300 continue; 301 } 302 lun = deve->se_lun; 303 304 spin_unlock_irq(&nacl->device_list_lock); 305 core_update_device_list_for_node(lun, NULL, deve->mapped_lun, 306 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0); 307 spin_lock_irq(&nacl->device_list_lock); 308 } 309 spin_unlock_irq(&nacl->device_list_lock); 310 311 kfree(nacl->device_list); 312 nacl->device_list = NULL; 313 314 return 0; 315 } 316 317 void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd) 318 { 319 struct se_dev_entry *deve; 320 321 spin_lock_irq(&se_nacl->device_list_lock); 322 deve = &se_nacl->device_list[se_cmd->orig_fe_lun]; 323 deve->deve_cmds--; 324 spin_unlock_irq(&se_nacl->device_list_lock); 325 326 return; 327 } 328 329 void core_update_device_list_access( 330 u32 mapped_lun, 331 u32 lun_access, 332 struct se_node_acl *nacl) 333 { 334 struct se_dev_entry *deve; 335 336 spin_lock_irq(&nacl->device_list_lock); 337 deve = &nacl->device_list[mapped_lun]; 338 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 339 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 340 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 341 } else { 342 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 343 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 344 } 345 spin_unlock_irq(&nacl->device_list_lock); 346 347 return; 348 } 349 350 /* core_update_device_list_for_node(): 351 * 352 * 353 */ 354 int core_update_device_list_for_node( 355 struct se_lun *lun, 356 struct se_lun_acl *lun_acl, 357 u32 mapped_lun, 358 u32 lun_access, 359 struct se_node_acl *nacl, 360 struct se_portal_group *tpg, 361 int enable) 362 { 363 struct se_port *port = lun->lun_sep; 364 struct se_dev_entry *deve = &nacl->device_list[mapped_lun]; 365 int trans = 0; 366 /* 367 * If the MappedLUN entry is being disabled, the entry in 368 * port->sep_alua_list must be removed now before clearing the 369 * struct se_dev_entry pointers below as logic in 370 * core_alua_do_transition_tg_pt() depends on these being present. 371 */ 372 if (!(enable)) { 373 /* 374 * deve->se_lun_acl will be NULL for demo-mode created LUNs 375 * that have not been explictly concerted to MappedLUNs -> 376 * struct se_lun_acl. 377 */ 378 if (!(deve->se_lun_acl)) 379 return 0; 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 return -1; 399 } 400 if (deve->se_lun != lun) { 401 printk(KERN_ERR "struct se_dev_entry->se_lun does" 402 " match passed struct se_lun for demo mode" 403 " -> explict LUN ACL transition\n"); 404 return -1; 405 } 406 deve->se_lun_acl = lun_acl; 407 trans = 1; 408 } else { 409 deve->se_lun = lun; 410 deve->se_lun_acl = lun_acl; 411 deve->mapped_lun = mapped_lun; 412 deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS; 413 } 414 415 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { 416 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; 417 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; 418 } else { 419 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; 420 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; 421 } 422 423 if (trans) { 424 spin_unlock_irq(&nacl->device_list_lock); 425 return 0; 426 } 427 deve->creation_time = get_jiffies_64(); 428 deve->attach_count++; 429 spin_unlock_irq(&nacl->device_list_lock); 430 431 spin_lock_bh(&port->sep_alua_lock); 432 list_add_tail(&deve->alua_port_list, &port->sep_alua_list); 433 spin_unlock_bh(&port->sep_alua_lock); 434 435 return 0; 436 } 437 /* 438 * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE 439 * PR operation to complete. 440 */ 441 spin_unlock_irq(&nacl->device_list_lock); 442 while (atomic_read(&deve->pr_ref_count) != 0) 443 cpu_relax(); 444 spin_lock_irq(&nacl->device_list_lock); 445 /* 446 * Disable struct se_dev_entry LUN ACL mapping 447 */ 448 core_scsi3_ua_release_all(deve); 449 deve->se_lun = NULL; 450 deve->se_lun_acl = NULL; 451 deve->lun_flags = 0; 452 deve->creation_time = 0; 453 deve->attach_count--; 454 spin_unlock_irq(&nacl->device_list_lock); 455 456 core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl); 457 return 0; 458 } 459 460 /* core_clear_lun_from_tpg(): 461 * 462 * 463 */ 464 void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg) 465 { 466 struct se_node_acl *nacl; 467 struct se_dev_entry *deve; 468 u32 i; 469 470 spin_lock_bh(&tpg->acl_node_lock); 471 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) { 472 spin_unlock_bh(&tpg->acl_node_lock); 473 474 spin_lock_irq(&nacl->device_list_lock); 475 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 476 deve = &nacl->device_list[i]; 477 if (lun != deve->se_lun) 478 continue; 479 spin_unlock_irq(&nacl->device_list_lock); 480 481 core_update_device_list_for_node(lun, NULL, 482 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS, 483 nacl, tpg, 0); 484 485 spin_lock_irq(&nacl->device_list_lock); 486 } 487 spin_unlock_irq(&nacl->device_list_lock); 488 489 spin_lock_bh(&tpg->acl_node_lock); 490 } 491 spin_unlock_bh(&tpg->acl_node_lock); 492 493 return; 494 } 495 496 static struct se_port *core_alloc_port(struct se_device *dev) 497 { 498 struct se_port *port, *port_tmp; 499 500 port = kzalloc(sizeof(struct se_port), GFP_KERNEL); 501 if (!(port)) { 502 printk(KERN_ERR "Unable to allocate struct se_port\n"); 503 return NULL; 504 } 505 INIT_LIST_HEAD(&port->sep_alua_list); 506 INIT_LIST_HEAD(&port->sep_list); 507 atomic_set(&port->sep_tg_pt_secondary_offline, 0); 508 spin_lock_init(&port->sep_alua_lock); 509 mutex_init(&port->sep_tg_pt_md_mutex); 510 511 spin_lock(&dev->se_port_lock); 512 if (dev->dev_port_count == 0x0000ffff) { 513 printk(KERN_WARNING "Reached dev->dev_port_count ==" 514 " 0x0000ffff\n"); 515 spin_unlock(&dev->se_port_lock); 516 return NULL; 517 } 518 again: 519 /* 520 * Allocate the next RELATIVE TARGET PORT IDENTIFER for this struct se_device 521 * Here is the table from spc4r17 section 7.7.3.8. 522 * 523 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field 524 * 525 * Code Description 526 * 0h Reserved 527 * 1h Relative port 1, historically known as port A 528 * 2h Relative port 2, historically known as port B 529 * 3h to FFFFh Relative port 3 through 65 535 530 */ 531 port->sep_rtpi = dev->dev_rpti_counter++; 532 if (!(port->sep_rtpi)) 533 goto again; 534 535 list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) { 536 /* 537 * Make sure RELATIVE TARGET PORT IDENTIFER is unique 538 * for 16-bit wrap.. 539 */ 540 if (port->sep_rtpi == port_tmp->sep_rtpi) 541 goto again; 542 } 543 spin_unlock(&dev->se_port_lock); 544 545 return port; 546 } 547 548 static void core_export_port( 549 struct se_device *dev, 550 struct se_portal_group *tpg, 551 struct se_port *port, 552 struct se_lun *lun) 553 { 554 struct se_subsystem_dev *su_dev = SU_DEV(dev); 555 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL; 556 557 spin_lock(&dev->se_port_lock); 558 spin_lock(&lun->lun_sep_lock); 559 port->sep_tpg = tpg; 560 port->sep_lun = lun; 561 lun->lun_sep = port; 562 spin_unlock(&lun->lun_sep_lock); 563 564 list_add_tail(&port->sep_list, &dev->dev_sep_list); 565 spin_unlock(&dev->se_port_lock); 566 567 if (T10_ALUA(su_dev)->alua_type == SPC3_ALUA_EMULATED) { 568 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port); 569 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) { 570 printk(KERN_ERR "Unable to allocate t10_alua_tg_pt" 571 "_gp_member_t\n"); 572 return; 573 } 574 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 575 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem, 576 T10_ALUA(su_dev)->default_tg_pt_gp); 577 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); 578 printk(KERN_INFO "%s/%s: Adding to default ALUA Target Port" 579 " Group: alua/default_tg_pt_gp\n", 580 TRANSPORT(dev)->name, TPG_TFO(tpg)->get_fabric_name()); 581 } 582 583 dev->dev_port_count++; 584 port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFER */ 585 } 586 587 /* 588 * Called with struct se_device->se_port_lock spinlock held. 589 */ 590 static void core_release_port(struct se_device *dev, struct se_port *port) 591 { 592 /* 593 * Wait for any port reference for PR ALL_TG_PT=1 operation 594 * to complete in __core_scsi3_alloc_registration() 595 */ 596 spin_unlock(&dev->se_port_lock); 597 if (atomic_read(&port->sep_tg_pt_ref_cnt)) 598 cpu_relax(); 599 spin_lock(&dev->se_port_lock); 600 601 core_alua_free_tg_pt_gp_mem(port); 602 603 list_del(&port->sep_list); 604 dev->dev_port_count--; 605 kfree(port); 606 607 return; 608 } 609 610 int core_dev_export( 611 struct se_device *dev, 612 struct se_portal_group *tpg, 613 struct se_lun *lun) 614 { 615 struct se_port *port; 616 617 port = core_alloc_port(dev); 618 if (!(port)) 619 return -1; 620 621 lun->lun_se_dev = dev; 622 se_dev_start(dev); 623 624 atomic_inc(&dev->dev_export_obj.obj_access_count); 625 core_export_port(dev, tpg, port, lun); 626 return 0; 627 } 628 629 void core_dev_unexport( 630 struct se_device *dev, 631 struct se_portal_group *tpg, 632 struct se_lun *lun) 633 { 634 struct se_port *port = lun->lun_sep; 635 636 spin_lock(&lun->lun_sep_lock); 637 if (lun->lun_se_dev == NULL) { 638 spin_unlock(&lun->lun_sep_lock); 639 return; 640 } 641 spin_unlock(&lun->lun_sep_lock); 642 643 spin_lock(&dev->se_port_lock); 644 atomic_dec(&dev->dev_export_obj.obj_access_count); 645 core_release_port(dev, port); 646 spin_unlock(&dev->se_port_lock); 647 648 se_dev_stop(dev); 649 lun->lun_se_dev = NULL; 650 } 651 652 int transport_core_report_lun_response(struct se_cmd *se_cmd) 653 { 654 struct se_dev_entry *deve; 655 struct se_lun *se_lun; 656 struct se_session *se_sess = SE_SESS(se_cmd); 657 struct se_task *se_task; 658 unsigned char *buf = (unsigned char *)T_TASK(se_cmd)->t_task_buf; 659 u32 cdb_offset = 0, lun_count = 0, offset = 8; 660 u64 i, lun; 661 662 list_for_each_entry(se_task, &T_TASK(se_cmd)->t_task_list, t_list) 663 break; 664 665 if (!(se_task)) { 666 printk(KERN_ERR "Unable to locate struct se_task for struct se_cmd\n"); 667 return PYX_TRANSPORT_LU_COMM_FAILURE; 668 } 669 670 /* 671 * If no struct se_session pointer is present, this struct se_cmd is 672 * coming via a target_core_mod PASSTHROUGH op, and not through 673 * a $FABRIC_MOD. In that case, report LUN=0 only. 674 */ 675 if (!(se_sess)) { 676 lun = 0; 677 buf[offset++] = ((lun >> 56) & 0xff); 678 buf[offset++] = ((lun >> 48) & 0xff); 679 buf[offset++] = ((lun >> 40) & 0xff); 680 buf[offset++] = ((lun >> 32) & 0xff); 681 buf[offset++] = ((lun >> 24) & 0xff); 682 buf[offset++] = ((lun >> 16) & 0xff); 683 buf[offset++] = ((lun >> 8) & 0xff); 684 buf[offset++] = (lun & 0xff); 685 lun_count = 1; 686 goto done; 687 } 688 689 spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); 690 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { 691 deve = &SE_NODE_ACL(se_sess)->device_list[i]; 692 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) 693 continue; 694 se_lun = deve->se_lun; 695 /* 696 * We determine the correct LUN LIST LENGTH even once we 697 * have reached the initial allocation length. 698 * See SPC2-R20 7.19. 699 */ 700 lun_count++; 701 if ((cdb_offset + 8) >= se_cmd->data_length) 702 continue; 703 704 lun = cpu_to_be64(CMD_TFO(se_cmd)->pack_lun(deve->mapped_lun)); 705 buf[offset++] = ((lun >> 56) & 0xff); 706 buf[offset++] = ((lun >> 48) & 0xff); 707 buf[offset++] = ((lun >> 40) & 0xff); 708 buf[offset++] = ((lun >> 32) & 0xff); 709 buf[offset++] = ((lun >> 24) & 0xff); 710 buf[offset++] = ((lun >> 16) & 0xff); 711 buf[offset++] = ((lun >> 8) & 0xff); 712 buf[offset++] = (lun & 0xff); 713 cdb_offset += 8; 714 } 715 spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); 716 717 /* 718 * See SPC3 r07, page 159. 719 */ 720 done: 721 lun_count *= 8; 722 buf[0] = ((lun_count >> 24) & 0xff); 723 buf[1] = ((lun_count >> 16) & 0xff); 724 buf[2] = ((lun_count >> 8) & 0xff); 725 buf[3] = (lun_count & 0xff); 726 727 return PYX_TRANSPORT_SENT_TO_TRANSPORT; 728 } 729 730 /* se_release_device_for_hba(): 731 * 732 * 733 */ 734 void se_release_device_for_hba(struct se_device *dev) 735 { 736 struct se_hba *hba = dev->se_hba; 737 738 if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) || 739 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) || 740 (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) || 741 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) || 742 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED)) 743 se_dev_stop(dev); 744 745 if (dev->dev_ptr) { 746 kthread_stop(dev->process_thread); 747 if (dev->transport->free_device) 748 dev->transport->free_device(dev->dev_ptr); 749 } 750 751 spin_lock(&hba->device_lock); 752 list_del(&dev->dev_list); 753 hba->dev_count--; 754 spin_unlock(&hba->device_lock); 755 756 core_scsi3_free_all_registrations(dev); 757 se_release_vpd_for_dev(dev); 758 759 kfree(dev->dev_status_queue_obj); 760 kfree(dev->dev_queue_obj); 761 kfree(dev); 762 763 return; 764 } 765 766 void se_release_vpd_for_dev(struct se_device *dev) 767 { 768 struct t10_vpd *vpd, *vpd_tmp; 769 770 spin_lock(&DEV_T10_WWN(dev)->t10_vpd_lock); 771 list_for_each_entry_safe(vpd, vpd_tmp, 772 &DEV_T10_WWN(dev)->t10_vpd_list, vpd_list) { 773 list_del(&vpd->vpd_list); 774 kfree(vpd); 775 } 776 spin_unlock(&DEV_T10_WWN(dev)->t10_vpd_lock); 777 778 return; 779 } 780 781 /* 782 * Called with struct se_hba->device_lock held. 783 */ 784 void se_clear_dev_ports(struct se_device *dev) 785 { 786 struct se_hba *hba = dev->se_hba; 787 struct se_lun *lun; 788 struct se_portal_group *tpg; 789 struct se_port *sep, *sep_tmp; 790 791 spin_lock(&dev->se_port_lock); 792 list_for_each_entry_safe(sep, sep_tmp, &dev->dev_sep_list, sep_list) { 793 spin_unlock(&dev->se_port_lock); 794 spin_unlock(&hba->device_lock); 795 796 lun = sep->sep_lun; 797 tpg = sep->sep_tpg; 798 spin_lock(&lun->lun_sep_lock); 799 if (lun->lun_se_dev == NULL) { 800 spin_unlock(&lun->lun_sep_lock); 801 continue; 802 } 803 spin_unlock(&lun->lun_sep_lock); 804 805 core_dev_del_lun(tpg, lun->unpacked_lun); 806 807 spin_lock(&hba->device_lock); 808 spin_lock(&dev->se_port_lock); 809 } 810 spin_unlock(&dev->se_port_lock); 811 812 return; 813 } 814 815 /* se_free_virtual_device(): 816 * 817 * Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers. 818 */ 819 int se_free_virtual_device(struct se_device *dev, struct se_hba *hba) 820 { 821 spin_lock(&hba->device_lock); 822 se_clear_dev_ports(dev); 823 spin_unlock(&hba->device_lock); 824 825 core_alua_free_lu_gp_mem(dev); 826 se_release_device_for_hba(dev); 827 828 return 0; 829 } 830 831 static void se_dev_start(struct se_device *dev) 832 { 833 struct se_hba *hba = dev->se_hba; 834 835 spin_lock(&hba->device_lock); 836 atomic_inc(&dev->dev_obj.obj_access_count); 837 if (atomic_read(&dev->dev_obj.obj_access_count) == 1) { 838 if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) { 839 dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED; 840 dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED; 841 } else if (dev->dev_status & 842 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) { 843 dev->dev_status &= 844 ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED; 845 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED; 846 } 847 } 848 spin_unlock(&hba->device_lock); 849 } 850 851 static void se_dev_stop(struct se_device *dev) 852 { 853 struct se_hba *hba = dev->se_hba; 854 855 spin_lock(&hba->device_lock); 856 atomic_dec(&dev->dev_obj.obj_access_count); 857 if (atomic_read(&dev->dev_obj.obj_access_count) == 0) { 858 if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) { 859 dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED; 860 dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED; 861 } else if (dev->dev_status & 862 TRANSPORT_DEVICE_OFFLINE_ACTIVATED) { 863 dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED; 864 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED; 865 } 866 } 867 spin_unlock(&hba->device_lock); 868 869 while (atomic_read(&hba->dev_mib_access_count)) 870 cpu_relax(); 871 } 872 873 int se_dev_check_online(struct se_device *dev) 874 { 875 int ret; 876 877 spin_lock_irq(&dev->dev_status_lock); 878 ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) || 879 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1; 880 spin_unlock_irq(&dev->dev_status_lock); 881 882 return ret; 883 } 884 885 int se_dev_check_shutdown(struct se_device *dev) 886 { 887 int ret; 888 889 spin_lock_irq(&dev->dev_status_lock); 890 ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN); 891 spin_unlock_irq(&dev->dev_status_lock); 892 893 return ret; 894 } 895 896 void se_dev_set_default_attribs( 897 struct se_device *dev, 898 struct se_dev_limits *dev_limits) 899 { 900 struct queue_limits *limits = &dev_limits->limits; 901 902 DEV_ATTRIB(dev)->emulate_dpo = DA_EMULATE_DPO; 903 DEV_ATTRIB(dev)->emulate_fua_write = DA_EMULATE_FUA_WRITE; 904 DEV_ATTRIB(dev)->emulate_fua_read = DA_EMULATE_FUA_READ; 905 DEV_ATTRIB(dev)->emulate_write_cache = DA_EMULATE_WRITE_CACHE; 906 DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL; 907 DEV_ATTRIB(dev)->emulate_tas = DA_EMULATE_TAS; 908 DEV_ATTRIB(dev)->emulate_tpu = DA_EMULATE_TPU; 909 DEV_ATTRIB(dev)->emulate_tpws = DA_EMULATE_TPWS; 910 DEV_ATTRIB(dev)->emulate_reservations = DA_EMULATE_RESERVATIONS; 911 DEV_ATTRIB(dev)->emulate_alua = DA_EMULATE_ALUA; 912 DEV_ATTRIB(dev)->enforce_pr_isids = DA_ENFORCE_PR_ISIDS; 913 /* 914 * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK 915 * iblock_create_virtdevice() from struct queue_limits values 916 * if blk_queue_discard()==1 917 */ 918 DEV_ATTRIB(dev)->max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT; 919 DEV_ATTRIB(dev)->max_unmap_block_desc_count = 920 DA_MAX_UNMAP_BLOCK_DESC_COUNT; 921 DEV_ATTRIB(dev)->unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT; 922 DEV_ATTRIB(dev)->unmap_granularity_alignment = 923 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT; 924 /* 925 * block_size is based on subsystem plugin dependent requirements. 926 */ 927 DEV_ATTRIB(dev)->hw_block_size = limits->logical_block_size; 928 DEV_ATTRIB(dev)->block_size = limits->logical_block_size; 929 /* 930 * max_sectors is based on subsystem plugin dependent requirements. 931 */ 932 DEV_ATTRIB(dev)->hw_max_sectors = limits->max_hw_sectors; 933 DEV_ATTRIB(dev)->max_sectors = limits->max_sectors; 934 /* 935 * Set optimal_sectors from max_sectors, which can be lowered via 936 * configfs. 937 */ 938 DEV_ATTRIB(dev)->optimal_sectors = limits->max_sectors; 939 /* 940 * queue_depth is based on subsystem plugin dependent requirements. 941 */ 942 DEV_ATTRIB(dev)->hw_queue_depth = dev_limits->hw_queue_depth; 943 DEV_ATTRIB(dev)->queue_depth = dev_limits->queue_depth; 944 } 945 946 int se_dev_set_task_timeout(struct se_device *dev, u32 task_timeout) 947 { 948 if (task_timeout > DA_TASK_TIMEOUT_MAX) { 949 printk(KERN_ERR "dev[%p]: Passed task_timeout: %u larger then" 950 " DA_TASK_TIMEOUT_MAX\n", dev, task_timeout); 951 return -1; 952 } else { 953 DEV_ATTRIB(dev)->task_timeout = task_timeout; 954 printk(KERN_INFO "dev[%p]: Set SE Device task_timeout: %u\n", 955 dev, task_timeout); 956 } 957 958 return 0; 959 } 960 961 int se_dev_set_max_unmap_lba_count( 962 struct se_device *dev, 963 u32 max_unmap_lba_count) 964 { 965 DEV_ATTRIB(dev)->max_unmap_lba_count = max_unmap_lba_count; 966 printk(KERN_INFO "dev[%p]: Set max_unmap_lba_count: %u\n", 967 dev, DEV_ATTRIB(dev)->max_unmap_lba_count); 968 return 0; 969 } 970 971 int se_dev_set_max_unmap_block_desc_count( 972 struct se_device *dev, 973 u32 max_unmap_block_desc_count) 974 { 975 DEV_ATTRIB(dev)->max_unmap_block_desc_count = max_unmap_block_desc_count; 976 printk(KERN_INFO "dev[%p]: Set max_unmap_block_desc_count: %u\n", 977 dev, DEV_ATTRIB(dev)->max_unmap_block_desc_count); 978 return 0; 979 } 980 981 int se_dev_set_unmap_granularity( 982 struct se_device *dev, 983 u32 unmap_granularity) 984 { 985 DEV_ATTRIB(dev)->unmap_granularity = unmap_granularity; 986 printk(KERN_INFO "dev[%p]: Set unmap_granularity: %u\n", 987 dev, DEV_ATTRIB(dev)->unmap_granularity); 988 return 0; 989 } 990 991 int se_dev_set_unmap_granularity_alignment( 992 struct se_device *dev, 993 u32 unmap_granularity_alignment) 994 { 995 DEV_ATTRIB(dev)->unmap_granularity_alignment = unmap_granularity_alignment; 996 printk(KERN_INFO "dev[%p]: Set unmap_granularity_alignment: %u\n", 997 dev, DEV_ATTRIB(dev)->unmap_granularity_alignment); 998 return 0; 999 } 1000 1001 int se_dev_set_emulate_dpo(struct se_device *dev, int flag) 1002 { 1003 if ((flag != 0) && (flag != 1)) { 1004 printk(KERN_ERR "Illegal value %d\n", flag); 1005 return -1; 1006 } 1007 if (TRANSPORT(dev)->dpo_emulated == NULL) { 1008 printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated is NULL\n"); 1009 return -1; 1010 } 1011 if (TRANSPORT(dev)->dpo_emulated(dev) == 0) { 1012 printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated not supported\n"); 1013 return -1; 1014 } 1015 DEV_ATTRIB(dev)->emulate_dpo = flag; 1016 printk(KERN_INFO "dev[%p]: SE Device Page Out (DPO) Emulation" 1017 " bit: %d\n", dev, DEV_ATTRIB(dev)->emulate_dpo); 1018 return 0; 1019 } 1020 1021 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag) 1022 { 1023 if ((flag != 0) && (flag != 1)) { 1024 printk(KERN_ERR "Illegal value %d\n", flag); 1025 return -1; 1026 } 1027 if (TRANSPORT(dev)->fua_write_emulated == NULL) { 1028 printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated is NULL\n"); 1029 return -1; 1030 } 1031 if (TRANSPORT(dev)->fua_write_emulated(dev) == 0) { 1032 printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated not supported\n"); 1033 return -1; 1034 } 1035 DEV_ATTRIB(dev)->emulate_fua_write = flag; 1036 printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access WRITEs: %d\n", 1037 dev, DEV_ATTRIB(dev)->emulate_fua_write); 1038 return 0; 1039 } 1040 1041 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag) 1042 { 1043 if ((flag != 0) && (flag != 1)) { 1044 printk(KERN_ERR "Illegal value %d\n", flag); 1045 return -1; 1046 } 1047 if (TRANSPORT(dev)->fua_read_emulated == NULL) { 1048 printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated is NULL\n"); 1049 return -1; 1050 } 1051 if (TRANSPORT(dev)->fua_read_emulated(dev) == 0) { 1052 printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated not supported\n"); 1053 return -1; 1054 } 1055 DEV_ATTRIB(dev)->emulate_fua_read = flag; 1056 printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access READs: %d\n", 1057 dev, DEV_ATTRIB(dev)->emulate_fua_read); 1058 return 0; 1059 } 1060 1061 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag) 1062 { 1063 if ((flag != 0) && (flag != 1)) { 1064 printk(KERN_ERR "Illegal value %d\n", flag); 1065 return -1; 1066 } 1067 if (TRANSPORT(dev)->write_cache_emulated == NULL) { 1068 printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated is NULL\n"); 1069 return -1; 1070 } 1071 if (TRANSPORT(dev)->write_cache_emulated(dev) == 0) { 1072 printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated not supported\n"); 1073 return -1; 1074 } 1075 DEV_ATTRIB(dev)->emulate_write_cache = flag; 1076 printk(KERN_INFO "dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 1077 dev, DEV_ATTRIB(dev)->emulate_write_cache); 1078 return 0; 1079 } 1080 1081 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag) 1082 { 1083 if ((flag != 0) && (flag != 1) && (flag != 2)) { 1084 printk(KERN_ERR "Illegal value %d\n", flag); 1085 return -1; 1086 } 1087 1088 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1089 printk(KERN_ERR "dev[%p]: Unable to change SE Device" 1090 " UA_INTRLCK_CTRL while dev_export_obj: %d count" 1091 " exists\n", dev, 1092 atomic_read(&dev->dev_export_obj.obj_access_count)); 1093 return -1; 1094 } 1095 DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = flag; 1096 printk(KERN_INFO "dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 1097 dev, DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl); 1098 1099 return 0; 1100 } 1101 1102 int se_dev_set_emulate_tas(struct se_device *dev, int flag) 1103 { 1104 if ((flag != 0) && (flag != 1)) { 1105 printk(KERN_ERR "Illegal value %d\n", flag); 1106 return -1; 1107 } 1108 1109 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1110 printk(KERN_ERR "dev[%p]: Unable to change SE Device TAS while" 1111 " dev_export_obj: %d count exists\n", dev, 1112 atomic_read(&dev->dev_export_obj.obj_access_count)); 1113 return -1; 1114 } 1115 DEV_ATTRIB(dev)->emulate_tas = flag; 1116 printk(KERN_INFO "dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 1117 dev, (DEV_ATTRIB(dev)->emulate_tas) ? "Enabled" : "Disabled"); 1118 1119 return 0; 1120 } 1121 1122 int se_dev_set_emulate_tpu(struct se_device *dev, int flag) 1123 { 1124 if ((flag != 0) && (flag != 1)) { 1125 printk(KERN_ERR "Illegal value %d\n", flag); 1126 return -1; 1127 } 1128 /* 1129 * We expect this value to be non-zero when generic Block Layer 1130 * Discard supported is detected iblock_create_virtdevice(). 1131 */ 1132 if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) { 1133 printk(KERN_ERR "Generic Block Discard not supported\n"); 1134 return -ENOSYS; 1135 } 1136 1137 DEV_ATTRIB(dev)->emulate_tpu = flag; 1138 printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 1139 dev, flag); 1140 return 0; 1141 } 1142 1143 int se_dev_set_emulate_tpws(struct se_device *dev, int flag) 1144 { 1145 if ((flag != 0) && (flag != 1)) { 1146 printk(KERN_ERR "Illegal value %d\n", flag); 1147 return -1; 1148 } 1149 /* 1150 * We expect this value to be non-zero when generic Block Layer 1151 * Discard supported is detected iblock_create_virtdevice(). 1152 */ 1153 if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) { 1154 printk(KERN_ERR "Generic Block Discard not supported\n"); 1155 return -ENOSYS; 1156 } 1157 1158 DEV_ATTRIB(dev)->emulate_tpws = flag; 1159 printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 1160 dev, flag); 1161 return 0; 1162 } 1163 1164 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag) 1165 { 1166 if ((flag != 0) && (flag != 1)) { 1167 printk(KERN_ERR "Illegal value %d\n", flag); 1168 return -1; 1169 } 1170 DEV_ATTRIB(dev)->enforce_pr_isids = flag; 1171 printk(KERN_INFO "dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev, 1172 (DEV_ATTRIB(dev)->enforce_pr_isids) ? "Enabled" : "Disabled"); 1173 return 0; 1174 } 1175 1176 /* 1177 * Note, this can only be called on unexported SE Device Object. 1178 */ 1179 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth) 1180 { 1181 u32 orig_queue_depth = dev->queue_depth; 1182 1183 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1184 printk(KERN_ERR "dev[%p]: Unable to change SE Device TCQ while" 1185 " dev_export_obj: %d count exists\n", dev, 1186 atomic_read(&dev->dev_export_obj.obj_access_count)); 1187 return -1; 1188 } 1189 if (!(queue_depth)) { 1190 printk(KERN_ERR "dev[%p]: Illegal ZERO value for queue" 1191 "_depth\n", dev); 1192 return -1; 1193 } 1194 1195 if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1196 if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) { 1197 printk(KERN_ERR "dev[%p]: Passed queue_depth: %u" 1198 " exceeds TCM/SE_Device TCQ: %u\n", 1199 dev, queue_depth, 1200 DEV_ATTRIB(dev)->hw_queue_depth); 1201 return -1; 1202 } 1203 } else { 1204 if (queue_depth > DEV_ATTRIB(dev)->queue_depth) { 1205 if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) { 1206 printk(KERN_ERR "dev[%p]: Passed queue_depth:" 1207 " %u exceeds TCM/SE_Device MAX" 1208 " TCQ: %u\n", dev, queue_depth, 1209 DEV_ATTRIB(dev)->hw_queue_depth); 1210 return -1; 1211 } 1212 } 1213 } 1214 1215 DEV_ATTRIB(dev)->queue_depth = dev->queue_depth = queue_depth; 1216 if (queue_depth > orig_queue_depth) 1217 atomic_add(queue_depth - orig_queue_depth, &dev->depth_left); 1218 else if (queue_depth < orig_queue_depth) 1219 atomic_sub(orig_queue_depth - queue_depth, &dev->depth_left); 1220 1221 printk(KERN_INFO "dev[%p]: SE Device TCQ Depth changed to: %u\n", 1222 dev, queue_depth); 1223 return 0; 1224 } 1225 1226 int se_dev_set_max_sectors(struct se_device *dev, u32 max_sectors) 1227 { 1228 int force = 0; /* Force setting for VDEVS */ 1229 1230 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1231 printk(KERN_ERR "dev[%p]: Unable to change SE Device" 1232 " max_sectors while dev_export_obj: %d count exists\n", 1233 dev, atomic_read(&dev->dev_export_obj.obj_access_count)); 1234 return -1; 1235 } 1236 if (!(max_sectors)) { 1237 printk(KERN_ERR "dev[%p]: Illegal ZERO value for" 1238 " max_sectors\n", dev); 1239 return -1; 1240 } 1241 if (max_sectors < DA_STATUS_MAX_SECTORS_MIN) { 1242 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u less than" 1243 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, max_sectors, 1244 DA_STATUS_MAX_SECTORS_MIN); 1245 return -1; 1246 } 1247 if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1248 if (max_sectors > DEV_ATTRIB(dev)->hw_max_sectors) { 1249 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u" 1250 " greater than TCM/SE_Device max_sectors:" 1251 " %u\n", dev, max_sectors, 1252 DEV_ATTRIB(dev)->hw_max_sectors); 1253 return -1; 1254 } 1255 } else { 1256 if (!(force) && (max_sectors > 1257 DEV_ATTRIB(dev)->hw_max_sectors)) { 1258 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u" 1259 " greater than TCM/SE_Device max_sectors" 1260 ": %u, use force=1 to override.\n", dev, 1261 max_sectors, DEV_ATTRIB(dev)->hw_max_sectors); 1262 return -1; 1263 } 1264 if (max_sectors > DA_STATUS_MAX_SECTORS_MAX) { 1265 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u" 1266 " greater than DA_STATUS_MAX_SECTORS_MAX:" 1267 " %u\n", dev, max_sectors, 1268 DA_STATUS_MAX_SECTORS_MAX); 1269 return -1; 1270 } 1271 } 1272 1273 DEV_ATTRIB(dev)->max_sectors = max_sectors; 1274 printk("dev[%p]: SE Device max_sectors changed to %u\n", 1275 dev, max_sectors); 1276 return 0; 1277 } 1278 1279 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors) 1280 { 1281 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1282 printk(KERN_ERR "dev[%p]: Unable to change SE Device" 1283 " optimal_sectors while dev_export_obj: %d count exists\n", 1284 dev, atomic_read(&dev->dev_export_obj.obj_access_count)); 1285 return -EINVAL; 1286 } 1287 if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1288 printk(KERN_ERR "dev[%p]: Passed optimal_sectors cannot be" 1289 " changed for TCM/pSCSI\n", dev); 1290 return -EINVAL; 1291 } 1292 if (optimal_sectors > DEV_ATTRIB(dev)->max_sectors) { 1293 printk(KERN_ERR "dev[%p]: Passed optimal_sectors %u cannot be" 1294 " greater than max_sectors: %u\n", dev, 1295 optimal_sectors, DEV_ATTRIB(dev)->max_sectors); 1296 return -EINVAL; 1297 } 1298 1299 DEV_ATTRIB(dev)->optimal_sectors = optimal_sectors; 1300 printk(KERN_INFO "dev[%p]: SE Device optimal_sectors changed to %u\n", 1301 dev, optimal_sectors); 1302 return 0; 1303 } 1304 1305 int se_dev_set_block_size(struct se_device *dev, u32 block_size) 1306 { 1307 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1308 printk(KERN_ERR "dev[%p]: Unable to change SE Device block_size" 1309 " while dev_export_obj: %d count exists\n", dev, 1310 atomic_read(&dev->dev_export_obj.obj_access_count)); 1311 return -1; 1312 } 1313 1314 if ((block_size != 512) && 1315 (block_size != 1024) && 1316 (block_size != 2048) && 1317 (block_size != 4096)) { 1318 printk(KERN_ERR "dev[%p]: Illegal value for block_device: %u" 1319 " for SE device, must be 512, 1024, 2048 or 4096\n", 1320 dev, block_size); 1321 return -1; 1322 } 1323 1324 if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { 1325 printk(KERN_ERR "dev[%p]: Not allowed to change block_size for" 1326 " Physical Device, use for Linux/SCSI to change" 1327 " block_size for underlying hardware\n", dev); 1328 return -1; 1329 } 1330 1331 DEV_ATTRIB(dev)->block_size = block_size; 1332 printk(KERN_INFO "dev[%p]: SE Device block_size changed to %u\n", 1333 dev, block_size); 1334 return 0; 1335 } 1336 1337 struct se_lun *core_dev_add_lun( 1338 struct se_portal_group *tpg, 1339 struct se_hba *hba, 1340 struct se_device *dev, 1341 u32 lun) 1342 { 1343 struct se_lun *lun_p; 1344 u32 lun_access = 0; 1345 1346 if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) { 1347 printk(KERN_ERR "Unable to export struct se_device while dev_access_obj: %d\n", 1348 atomic_read(&dev->dev_access_obj.obj_access_count)); 1349 return NULL; 1350 } 1351 1352 lun_p = core_tpg_pre_addlun(tpg, lun); 1353 if ((IS_ERR(lun_p)) || !(lun_p)) 1354 return NULL; 1355 1356 if (dev->dev_flags & DF_READ_ONLY) 1357 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; 1358 else 1359 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE; 1360 1361 if (core_tpg_post_addlun(tpg, lun_p, lun_access, dev) < 0) 1362 return NULL; 1363 1364 printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from" 1365 " CORE HBA: %u\n", TPG_TFO(tpg)->get_fabric_name(), 1366 TPG_TFO(tpg)->tpg_get_tag(tpg), lun_p->unpacked_lun, 1367 TPG_TFO(tpg)->get_fabric_name(), hba->hba_id); 1368 /* 1369 * Update LUN maps for dynamically added initiators when 1370 * generate_node_acl is enabled. 1371 */ 1372 if (TPG_TFO(tpg)->tpg_check_demo_mode(tpg)) { 1373 struct se_node_acl *acl; 1374 spin_lock_bh(&tpg->acl_node_lock); 1375 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { 1376 if (acl->dynamic_node_acl) { 1377 spin_unlock_bh(&tpg->acl_node_lock); 1378 core_tpg_add_node_to_devs(acl, tpg); 1379 spin_lock_bh(&tpg->acl_node_lock); 1380 } 1381 } 1382 spin_unlock_bh(&tpg->acl_node_lock); 1383 } 1384 1385 return lun_p; 1386 } 1387 1388 /* core_dev_del_lun(): 1389 * 1390 * 1391 */ 1392 int core_dev_del_lun( 1393 struct se_portal_group *tpg, 1394 u32 unpacked_lun) 1395 { 1396 struct se_lun *lun; 1397 int ret = 0; 1398 1399 lun = core_tpg_pre_dellun(tpg, unpacked_lun, &ret); 1400 if (!(lun)) 1401 return ret; 1402 1403 core_tpg_post_dellun(tpg, lun); 1404 1405 printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from" 1406 " device object\n", TPG_TFO(tpg)->get_fabric_name(), 1407 TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun, 1408 TPG_TFO(tpg)->get_fabric_name()); 1409 1410 return 0; 1411 } 1412 1413 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun) 1414 { 1415 struct se_lun *lun; 1416 1417 spin_lock(&tpg->tpg_lun_lock); 1418 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1419 printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS" 1420 "_PER_TPG-1: %u for Target Portal Group: %hu\n", 1421 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, 1422 TRANSPORT_MAX_LUNS_PER_TPG-1, 1423 TPG_TFO(tpg)->tpg_get_tag(tpg)); 1424 spin_unlock(&tpg->tpg_lun_lock); 1425 return NULL; 1426 } 1427 lun = &tpg->tpg_lun_list[unpacked_lun]; 1428 1429 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) { 1430 printk(KERN_ERR "%s Logical Unit Number: %u is not free on" 1431 " Target Portal Group: %hu, ignoring request.\n", 1432 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, 1433 TPG_TFO(tpg)->tpg_get_tag(tpg)); 1434 spin_unlock(&tpg->tpg_lun_lock); 1435 return NULL; 1436 } 1437 spin_unlock(&tpg->tpg_lun_lock); 1438 1439 return lun; 1440 } 1441 1442 /* core_dev_get_lun(): 1443 * 1444 * 1445 */ 1446 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun) 1447 { 1448 struct se_lun *lun; 1449 1450 spin_lock(&tpg->tpg_lun_lock); 1451 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { 1452 printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER" 1453 "_TPG-1: %u for Target Portal Group: %hu\n", 1454 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, 1455 TRANSPORT_MAX_LUNS_PER_TPG-1, 1456 TPG_TFO(tpg)->tpg_get_tag(tpg)); 1457 spin_unlock(&tpg->tpg_lun_lock); 1458 return NULL; 1459 } 1460 lun = &tpg->tpg_lun_list[unpacked_lun]; 1461 1462 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { 1463 printk(KERN_ERR "%s Logical Unit Number: %u is not active on" 1464 " Target Portal Group: %hu, ignoring request.\n", 1465 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, 1466 TPG_TFO(tpg)->tpg_get_tag(tpg)); 1467 spin_unlock(&tpg->tpg_lun_lock); 1468 return NULL; 1469 } 1470 spin_unlock(&tpg->tpg_lun_lock); 1471 1472 return lun; 1473 } 1474 1475 struct se_lun_acl *core_dev_init_initiator_node_lun_acl( 1476 struct se_portal_group *tpg, 1477 u32 mapped_lun, 1478 char *initiatorname, 1479 int *ret) 1480 { 1481 struct se_lun_acl *lacl; 1482 struct se_node_acl *nacl; 1483 1484 if (strlen(initiatorname) > TRANSPORT_IQN_LEN) { 1485 printk(KERN_ERR "%s InitiatorName exceeds maximum size.\n", 1486 TPG_TFO(tpg)->get_fabric_name()); 1487 *ret = -EOVERFLOW; 1488 return NULL; 1489 } 1490 nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname); 1491 if (!(nacl)) { 1492 *ret = -EINVAL; 1493 return NULL; 1494 } 1495 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL); 1496 if (!(lacl)) { 1497 printk(KERN_ERR "Unable to allocate memory for struct se_lun_acl.\n"); 1498 *ret = -ENOMEM; 1499 return NULL; 1500 } 1501 1502 INIT_LIST_HEAD(&lacl->lacl_list); 1503 lacl->mapped_lun = mapped_lun; 1504 lacl->se_lun_nacl = nacl; 1505 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); 1506 1507 return lacl; 1508 } 1509 1510 int core_dev_add_initiator_node_lun_acl( 1511 struct se_portal_group *tpg, 1512 struct se_lun_acl *lacl, 1513 u32 unpacked_lun, 1514 u32 lun_access) 1515 { 1516 struct se_lun *lun; 1517 struct se_node_acl *nacl; 1518 1519 lun = core_dev_get_lun(tpg, unpacked_lun); 1520 if (!(lun)) { 1521 printk(KERN_ERR "%s Logical Unit Number: %u is not active on" 1522 " Target Portal Group: %hu, ignoring request.\n", 1523 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, 1524 TPG_TFO(tpg)->tpg_get_tag(tpg)); 1525 return -EINVAL; 1526 } 1527 1528 nacl = lacl->se_lun_nacl; 1529 if (!(nacl)) 1530 return -EINVAL; 1531 1532 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) && 1533 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE)) 1534 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; 1535 1536 lacl->se_lun = lun; 1537 1538 if (core_update_device_list_for_node(lun, lacl, lacl->mapped_lun, 1539 lun_access, nacl, tpg, 1) < 0) 1540 return -EINVAL; 1541 1542 spin_lock(&lun->lun_acl_lock); 1543 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list); 1544 atomic_inc(&lun->lun_acl_count); 1545 smp_mb__after_atomic_inc(); 1546 spin_unlock(&lun->lun_acl_lock); 1547 1548 printk(KERN_INFO "%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for " 1549 " InitiatorNode: %s\n", TPG_TFO(tpg)->get_fabric_name(), 1550 TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun, 1551 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO", 1552 lacl->initiatorname); 1553 /* 1554 * Check to see if there are any existing persistent reservation APTPL 1555 * pre-registrations that need to be enabled for this LUN ACL.. 1556 */ 1557 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl); 1558 return 0; 1559 } 1560 1561 /* core_dev_del_initiator_node_lun_acl(): 1562 * 1563 * 1564 */ 1565 int core_dev_del_initiator_node_lun_acl( 1566 struct se_portal_group *tpg, 1567 struct se_lun *lun, 1568 struct se_lun_acl *lacl) 1569 { 1570 struct se_node_acl *nacl; 1571 1572 nacl = lacl->se_lun_nacl; 1573 if (!(nacl)) 1574 return -EINVAL; 1575 1576 spin_lock(&lun->lun_acl_lock); 1577 list_del(&lacl->lacl_list); 1578 atomic_dec(&lun->lun_acl_count); 1579 smp_mb__after_atomic_dec(); 1580 spin_unlock(&lun->lun_acl_lock); 1581 1582 core_update_device_list_for_node(lun, NULL, lacl->mapped_lun, 1583 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0); 1584 1585 lacl->se_lun = NULL; 1586 1587 printk(KERN_INFO "%s_TPG[%hu]_LUN[%u] - Removed ACL for" 1588 " InitiatorNode: %s Mapped LUN: %u\n", 1589 TPG_TFO(tpg)->get_fabric_name(), 1590 TPG_TFO(tpg)->tpg_get_tag(tpg), lun->unpacked_lun, 1591 lacl->initiatorname, lacl->mapped_lun); 1592 1593 return 0; 1594 } 1595 1596 void core_dev_free_initiator_node_lun_acl( 1597 struct se_portal_group *tpg, 1598 struct se_lun_acl *lacl) 1599 { 1600 printk("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s" 1601 " Mapped LUN: %u\n", TPG_TFO(tpg)->get_fabric_name(), 1602 TPG_TFO(tpg)->tpg_get_tag(tpg), 1603 TPG_TFO(tpg)->get_fabric_name(), 1604 lacl->initiatorname, lacl->mapped_lun); 1605 1606 kfree(lacl); 1607 } 1608 1609 int core_dev_setup_virtual_lun0(void) 1610 { 1611 struct se_hba *hba; 1612 struct se_device *dev; 1613 struct se_subsystem_dev *se_dev = NULL; 1614 struct se_subsystem_api *t; 1615 char buf[16]; 1616 int ret; 1617 1618 hba = core_alloc_hba("rd_dr", 0, HBA_FLAGS_INTERNAL_USE); 1619 if (IS_ERR(hba)) 1620 return PTR_ERR(hba); 1621 1622 se_global->g_lun0_hba = hba; 1623 t = hba->transport; 1624 1625 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL); 1626 if (!(se_dev)) { 1627 printk(KERN_ERR "Unable to allocate memory for" 1628 " struct se_subsystem_dev\n"); 1629 ret = -ENOMEM; 1630 goto out; 1631 } 1632 INIT_LIST_HEAD(&se_dev->g_se_dev_list); 1633 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list); 1634 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock); 1635 INIT_LIST_HEAD(&se_dev->t10_reservation.registration_list); 1636 INIT_LIST_HEAD(&se_dev->t10_reservation.aptpl_reg_list); 1637 spin_lock_init(&se_dev->t10_reservation.registration_lock); 1638 spin_lock_init(&se_dev->t10_reservation.aptpl_reg_lock); 1639 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list); 1640 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock); 1641 spin_lock_init(&se_dev->se_dev_lock); 1642 se_dev->t10_reservation.pr_aptpl_buf_len = PR_APTPL_BUF_LEN; 1643 se_dev->t10_wwn.t10_sub_dev = se_dev; 1644 se_dev->t10_alua.t10_sub_dev = se_dev; 1645 se_dev->se_dev_attrib.da_sub_dev = se_dev; 1646 se_dev->se_dev_hba = hba; 1647 1648 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0"); 1649 if (!(se_dev->se_dev_su_ptr)) { 1650 printk(KERN_ERR "Unable to locate subsystem dependent pointer" 1651 " from allocate_virtdevice()\n"); 1652 ret = -ENOMEM; 1653 goto out; 1654 } 1655 se_global->g_lun0_su_dev = se_dev; 1656 1657 memset(buf, 0, 16); 1658 sprintf(buf, "rd_pages=8"); 1659 t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf)); 1660 1661 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr); 1662 if (!(dev) || IS_ERR(dev)) { 1663 ret = -ENOMEM; 1664 goto out; 1665 } 1666 se_dev->se_dev_ptr = dev; 1667 se_global->g_lun0_dev = dev; 1668 1669 return 0; 1670 out: 1671 se_global->g_lun0_su_dev = NULL; 1672 kfree(se_dev); 1673 if (se_global->g_lun0_hba) { 1674 core_delete_hba(se_global->g_lun0_hba); 1675 se_global->g_lun0_hba = NULL; 1676 } 1677 return ret; 1678 } 1679 1680 1681 void core_dev_release_virtual_lun0(void) 1682 { 1683 struct se_hba *hba = se_global->g_lun0_hba; 1684 struct se_subsystem_dev *su_dev = se_global->g_lun0_su_dev; 1685 1686 if (!(hba)) 1687 return; 1688 1689 if (se_global->g_lun0_dev) 1690 se_free_virtual_device(se_global->g_lun0_dev, hba); 1691 1692 kfree(su_dev); 1693 core_delete_hba(hba); 1694 } 1695