1 /******************************************************************************* 2 * Filename: target_core_configfs.c 3 * 4 * This file contains ConfigFS logic for the Generic Target Engine project. 5 * 6 * Copyright (c) 2008-2010 Rising Tide Systems 7 * Copyright (c) 2008-2010 Linux-iSCSI.org 8 * 9 * Nicholas A. Bellinger <nab@kernel.org> 10 * 11 * based on configfs Copyright (C) 2005 Oracle. All rights reserved. 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of the GNU General Public License as published by 15 * the Free Software Foundation; either version 2 of the License, or 16 * (at your option) any later version. 17 * 18 * This program is distributed in the hope that it will be useful, 19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 * GNU General Public License for more details. 22 ****************************************************************************/ 23 24 #include <linux/module.h> 25 #include <linux/moduleparam.h> 26 #include <linux/version.h> 27 #include <generated/utsrelease.h> 28 #include <linux/utsname.h> 29 #include <linux/init.h> 30 #include <linux/fs.h> 31 #include <linux/namei.h> 32 #include <linux/slab.h> 33 #include <linux/types.h> 34 #include <linux/delay.h> 35 #include <linux/unistd.h> 36 #include <linux/string.h> 37 #include <linux/parser.h> 38 #include <linux/syscalls.h> 39 #include <linux/configfs.h> 40 #include <linux/proc_fs.h> 41 42 #include <target/target_core_base.h> 43 #include <target/target_core_device.h> 44 #include <target/target_core_transport.h> 45 #include <target/target_core_fabric_ops.h> 46 #include <target/target_core_fabric_configfs.h> 47 #include <target/target_core_configfs.h> 48 #include <target/configfs_macros.h> 49 50 #include "target_core_alua.h" 51 #include "target_core_hba.h" 52 #include "target_core_pr.h" 53 #include "target_core_rd.h" 54 55 static struct list_head g_tf_list; 56 static struct mutex g_tf_lock; 57 58 struct target_core_configfs_attribute { 59 struct configfs_attribute attr; 60 ssize_t (*show)(void *, char *); 61 ssize_t (*store)(void *, const char *, size_t); 62 }; 63 64 static inline struct se_hba * 65 item_to_hba(struct config_item *item) 66 { 67 return container_of(to_config_group(item), struct se_hba, hba_group); 68 } 69 70 /* 71 * Attributes for /sys/kernel/config/target/ 72 */ 73 static ssize_t target_core_attr_show(struct config_item *item, 74 struct configfs_attribute *attr, 75 char *page) 76 { 77 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s" 78 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION, 79 utsname()->sysname, utsname()->machine); 80 } 81 82 static struct configfs_item_operations target_core_fabric_item_ops = { 83 .show_attribute = target_core_attr_show, 84 }; 85 86 static struct configfs_attribute target_core_item_attr_version = { 87 .ca_owner = THIS_MODULE, 88 .ca_name = "version", 89 .ca_mode = S_IRUGO, 90 }; 91 92 static struct target_fabric_configfs *target_core_get_fabric( 93 const char *name) 94 { 95 struct target_fabric_configfs *tf; 96 97 if (!(name)) 98 return NULL; 99 100 mutex_lock(&g_tf_lock); 101 list_for_each_entry(tf, &g_tf_list, tf_list) { 102 if (!(strcmp(tf->tf_name, name))) { 103 atomic_inc(&tf->tf_access_cnt); 104 mutex_unlock(&g_tf_lock); 105 return tf; 106 } 107 } 108 mutex_unlock(&g_tf_lock); 109 110 return NULL; 111 } 112 113 /* 114 * Called from struct target_core_group_ops->make_group() 115 */ 116 static struct config_group *target_core_register_fabric( 117 struct config_group *group, 118 const char *name) 119 { 120 struct target_fabric_configfs *tf; 121 int ret; 122 123 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> group: %p name:" 124 " %s\n", group, name); 125 /* 126 * Ensure that TCM subsystem plugins are loaded at this point for 127 * using the RAMDISK_DR virtual LUN 0 and all other struct se_port 128 * LUN symlinks. 129 */ 130 if (transport_subsystem_check_init() < 0) 131 return ERR_PTR(-EINVAL); 132 133 /* 134 * Below are some hardcoded request_module() calls to automatically 135 * local fabric modules when the following is called: 136 * 137 * mkdir -p /sys/kernel/config/target/$MODULE_NAME 138 * 139 * Note that this does not limit which TCM fabric module can be 140 * registered, but simply provids auto loading logic for modules with 141 * mkdir(2) system calls with known TCM fabric modules. 142 */ 143 if (!(strncmp(name, "iscsi", 5))) { 144 /* 145 * Automatically load the LIO Target fabric module when the 146 * following is called: 147 * 148 * mkdir -p $CONFIGFS/target/iscsi 149 */ 150 ret = request_module("iscsi_target_mod"); 151 if (ret < 0) { 152 printk(KERN_ERR "request_module() failed for" 153 " iscsi_target_mod.ko: %d\n", ret); 154 return ERR_PTR(-EINVAL); 155 } 156 } else if (!(strncmp(name, "loopback", 8))) { 157 /* 158 * Automatically load the tcm_loop fabric module when the 159 * following is called: 160 * 161 * mkdir -p $CONFIGFS/target/loopback 162 */ 163 ret = request_module("tcm_loop"); 164 if (ret < 0) { 165 printk(KERN_ERR "request_module() failed for" 166 " tcm_loop.ko: %d\n", ret); 167 return ERR_PTR(-EINVAL); 168 } 169 } 170 171 tf = target_core_get_fabric(name); 172 if (!(tf)) { 173 printk(KERN_ERR "target_core_get_fabric() failed for %s\n", 174 name); 175 return ERR_PTR(-EINVAL); 176 } 177 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Located fabric:" 178 " %s\n", tf->tf_name); 179 /* 180 * On a successful target_core_get_fabric() look, the returned 181 * struct target_fabric_configfs *tf will contain a usage reference. 182 */ 183 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n", 184 &TF_CIT_TMPL(tf)->tfc_wwn_cit); 185 186 tf->tf_group.default_groups = tf->tf_default_groups; 187 tf->tf_group.default_groups[0] = &tf->tf_disc_group; 188 tf->tf_group.default_groups[1] = NULL; 189 190 config_group_init_type_name(&tf->tf_group, name, 191 &TF_CIT_TMPL(tf)->tfc_wwn_cit); 192 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth", 193 &TF_CIT_TMPL(tf)->tfc_discovery_cit); 194 195 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Allocated Fabric:" 196 " %s\n", tf->tf_group.cg_item.ci_name); 197 /* 198 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item() 199 */ 200 tf->tf_ops.tf_subsys = tf->tf_subsys; 201 tf->tf_fabric = &tf->tf_group.cg_item; 202 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric" 203 " for %s\n", name); 204 205 return &tf->tf_group; 206 } 207 208 /* 209 * Called from struct target_core_group_ops->drop_item() 210 */ 211 static void target_core_deregister_fabric( 212 struct config_group *group, 213 struct config_item *item) 214 { 215 struct target_fabric_configfs *tf = container_of( 216 to_config_group(item), struct target_fabric_configfs, tf_group); 217 struct config_group *tf_group; 218 struct config_item *df_item; 219 int i; 220 221 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Looking up %s in" 222 " tf list\n", config_item_name(item)); 223 224 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> located fabric:" 225 " %s\n", tf->tf_name); 226 atomic_dec(&tf->tf_access_cnt); 227 228 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing" 229 " tf->tf_fabric for %s\n", tf->tf_name); 230 tf->tf_fabric = NULL; 231 232 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing ci" 233 " %s\n", config_item_name(item)); 234 235 tf_group = &tf->tf_group; 236 for (i = 0; tf_group->default_groups[i]; i++) { 237 df_item = &tf_group->default_groups[i]->cg_item; 238 tf_group->default_groups[i] = NULL; 239 config_item_put(df_item); 240 } 241 config_item_put(item); 242 } 243 244 static struct configfs_group_operations target_core_fabric_group_ops = { 245 .make_group = &target_core_register_fabric, 246 .drop_item = &target_core_deregister_fabric, 247 }; 248 249 /* 250 * All item attributes appearing in /sys/kernel/target/ appear here. 251 */ 252 static struct configfs_attribute *target_core_fabric_item_attrs[] = { 253 &target_core_item_attr_version, 254 NULL, 255 }; 256 257 /* 258 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/ 259 */ 260 static struct config_item_type target_core_fabrics_item = { 261 .ct_item_ops = &target_core_fabric_item_ops, 262 .ct_group_ops = &target_core_fabric_group_ops, 263 .ct_attrs = target_core_fabric_item_attrs, 264 .ct_owner = THIS_MODULE, 265 }; 266 267 static struct configfs_subsystem target_core_fabrics = { 268 .su_group = { 269 .cg_item = { 270 .ci_namebuf = "target", 271 .ci_type = &target_core_fabrics_item, 272 }, 273 }, 274 }; 275 276 static struct configfs_subsystem *target_core_subsystem[] = { 277 &target_core_fabrics, 278 NULL, 279 }; 280 281 /*############################################################################## 282 // Start functions called by external Target Fabrics Modules 283 //############################################################################*/ 284 285 /* 286 * First function called by fabric modules to: 287 * 288 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer. 289 * 2) Add struct target_fabric_configfs to g_tf_list 290 * 3) Return struct target_fabric_configfs to fabric module to be passed 291 * into target_fabric_configfs_register(). 292 */ 293 struct target_fabric_configfs *target_fabric_configfs_init( 294 struct module *fabric_mod, 295 const char *name) 296 { 297 struct target_fabric_configfs *tf; 298 299 if (!(fabric_mod)) { 300 printk(KERN_ERR "Missing struct module *fabric_mod pointer\n"); 301 return NULL; 302 } 303 if (!(name)) { 304 printk(KERN_ERR "Unable to locate passed fabric name\n"); 305 return NULL; 306 } 307 if (strlen(name) > TARGET_FABRIC_NAME_SIZE) { 308 printk(KERN_ERR "Passed name: %s exceeds TARGET_FABRIC" 309 "_NAME_SIZE\n", name); 310 return NULL; 311 } 312 313 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL); 314 if (!(tf)) 315 return ERR_PTR(-ENOMEM); 316 317 INIT_LIST_HEAD(&tf->tf_list); 318 atomic_set(&tf->tf_access_cnt, 0); 319 /* 320 * Setup the default generic struct config_item_type's (cits) in 321 * struct target_fabric_configfs->tf_cit_tmpl 322 */ 323 tf->tf_module = fabric_mod; 324 target_fabric_setup_cits(tf); 325 326 tf->tf_subsys = target_core_subsystem[0]; 327 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name); 328 329 mutex_lock(&g_tf_lock); 330 list_add_tail(&tf->tf_list, &g_tf_list); 331 mutex_unlock(&g_tf_lock); 332 333 printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>" 334 ">>>>>>>>>>>>>>\n"); 335 printk(KERN_INFO "Initialized struct target_fabric_configfs: %p for" 336 " %s\n", tf, tf->tf_name); 337 return tf; 338 } 339 EXPORT_SYMBOL(target_fabric_configfs_init); 340 341 /* 342 * Called by fabric plugins after FAILED target_fabric_configfs_register() call. 343 */ 344 void target_fabric_configfs_free( 345 struct target_fabric_configfs *tf) 346 { 347 mutex_lock(&g_tf_lock); 348 list_del(&tf->tf_list); 349 mutex_unlock(&g_tf_lock); 350 351 kfree(tf); 352 } 353 EXPORT_SYMBOL(target_fabric_configfs_free); 354 355 /* 356 * Perform a sanity check of the passed tf->tf_ops before completing 357 * TCM fabric module registration. 358 */ 359 static int target_fabric_tf_ops_check( 360 struct target_fabric_configfs *tf) 361 { 362 struct target_core_fabric_ops *tfo = &tf->tf_ops; 363 364 if (!(tfo->get_fabric_name)) { 365 printk(KERN_ERR "Missing tfo->get_fabric_name()\n"); 366 return -EINVAL; 367 } 368 if (!(tfo->get_fabric_proto_ident)) { 369 printk(KERN_ERR "Missing tfo->get_fabric_proto_ident()\n"); 370 return -EINVAL; 371 } 372 if (!(tfo->tpg_get_wwn)) { 373 printk(KERN_ERR "Missing tfo->tpg_get_wwn()\n"); 374 return -EINVAL; 375 } 376 if (!(tfo->tpg_get_tag)) { 377 printk(KERN_ERR "Missing tfo->tpg_get_tag()\n"); 378 return -EINVAL; 379 } 380 if (!(tfo->tpg_get_default_depth)) { 381 printk(KERN_ERR "Missing tfo->tpg_get_default_depth()\n"); 382 return -EINVAL; 383 } 384 if (!(tfo->tpg_get_pr_transport_id)) { 385 printk(KERN_ERR "Missing tfo->tpg_get_pr_transport_id()\n"); 386 return -EINVAL; 387 } 388 if (!(tfo->tpg_get_pr_transport_id_len)) { 389 printk(KERN_ERR "Missing tfo->tpg_get_pr_transport_id_len()\n"); 390 return -EINVAL; 391 } 392 if (!(tfo->tpg_check_demo_mode)) { 393 printk(KERN_ERR "Missing tfo->tpg_check_demo_mode()\n"); 394 return -EINVAL; 395 } 396 if (!(tfo->tpg_check_demo_mode_cache)) { 397 printk(KERN_ERR "Missing tfo->tpg_check_demo_mode_cache()\n"); 398 return -EINVAL; 399 } 400 if (!(tfo->tpg_check_demo_mode_write_protect)) { 401 printk(KERN_ERR "Missing tfo->tpg_check_demo_mode_write_protect()\n"); 402 return -EINVAL; 403 } 404 if (!(tfo->tpg_check_prod_mode_write_protect)) { 405 printk(KERN_ERR "Missing tfo->tpg_check_prod_mode_write_protect()\n"); 406 return -EINVAL; 407 } 408 if (!(tfo->tpg_alloc_fabric_acl)) { 409 printk(KERN_ERR "Missing tfo->tpg_alloc_fabric_acl()\n"); 410 return -EINVAL; 411 } 412 if (!(tfo->tpg_release_fabric_acl)) { 413 printk(KERN_ERR "Missing tfo->tpg_release_fabric_acl()\n"); 414 return -EINVAL; 415 } 416 if (!(tfo->tpg_get_inst_index)) { 417 printk(KERN_ERR "Missing tfo->tpg_get_inst_index()\n"); 418 return -EINVAL; 419 } 420 if (!(tfo->release_cmd_to_pool)) { 421 printk(KERN_ERR "Missing tfo->release_cmd_to_pool()\n"); 422 return -EINVAL; 423 } 424 if (!(tfo->release_cmd_direct)) { 425 printk(KERN_ERR "Missing tfo->release_cmd_direct()\n"); 426 return -EINVAL; 427 } 428 if (!(tfo->shutdown_session)) { 429 printk(KERN_ERR "Missing tfo->shutdown_session()\n"); 430 return -EINVAL; 431 } 432 if (!(tfo->close_session)) { 433 printk(KERN_ERR "Missing tfo->close_session()\n"); 434 return -EINVAL; 435 } 436 if (!(tfo->stop_session)) { 437 printk(KERN_ERR "Missing tfo->stop_session()\n"); 438 return -EINVAL; 439 } 440 if (!(tfo->fall_back_to_erl0)) { 441 printk(KERN_ERR "Missing tfo->fall_back_to_erl0()\n"); 442 return -EINVAL; 443 } 444 if (!(tfo->sess_logged_in)) { 445 printk(KERN_ERR "Missing tfo->sess_logged_in()\n"); 446 return -EINVAL; 447 } 448 if (!(tfo->sess_get_index)) { 449 printk(KERN_ERR "Missing tfo->sess_get_index()\n"); 450 return -EINVAL; 451 } 452 if (!(tfo->write_pending)) { 453 printk(KERN_ERR "Missing tfo->write_pending()\n"); 454 return -EINVAL; 455 } 456 if (!(tfo->write_pending_status)) { 457 printk(KERN_ERR "Missing tfo->write_pending_status()\n"); 458 return -EINVAL; 459 } 460 if (!(tfo->set_default_node_attributes)) { 461 printk(KERN_ERR "Missing tfo->set_default_node_attributes()\n"); 462 return -EINVAL; 463 } 464 if (!(tfo->get_task_tag)) { 465 printk(KERN_ERR "Missing tfo->get_task_tag()\n"); 466 return -EINVAL; 467 } 468 if (!(tfo->get_cmd_state)) { 469 printk(KERN_ERR "Missing tfo->get_cmd_state()\n"); 470 return -EINVAL; 471 } 472 if (!(tfo->new_cmd_failure)) { 473 printk(KERN_ERR "Missing tfo->new_cmd_failure()\n"); 474 return -EINVAL; 475 } 476 if (!(tfo->queue_data_in)) { 477 printk(KERN_ERR "Missing tfo->queue_data_in()\n"); 478 return -EINVAL; 479 } 480 if (!(tfo->queue_status)) { 481 printk(KERN_ERR "Missing tfo->queue_status()\n"); 482 return -EINVAL; 483 } 484 if (!(tfo->queue_tm_rsp)) { 485 printk(KERN_ERR "Missing tfo->queue_tm_rsp()\n"); 486 return -EINVAL; 487 } 488 if (!(tfo->set_fabric_sense_len)) { 489 printk(KERN_ERR "Missing tfo->set_fabric_sense_len()\n"); 490 return -EINVAL; 491 } 492 if (!(tfo->get_fabric_sense_len)) { 493 printk(KERN_ERR "Missing tfo->get_fabric_sense_len()\n"); 494 return -EINVAL; 495 } 496 if (!(tfo->is_state_remove)) { 497 printk(KERN_ERR "Missing tfo->is_state_remove()\n"); 498 return -EINVAL; 499 } 500 if (!(tfo->pack_lun)) { 501 printk(KERN_ERR "Missing tfo->pack_lun()\n"); 502 return -EINVAL; 503 } 504 /* 505 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn() 506 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in 507 * target_core_fabric_configfs.c WWN+TPG group context code. 508 */ 509 if (!(tfo->fabric_make_wwn)) { 510 printk(KERN_ERR "Missing tfo->fabric_make_wwn()\n"); 511 return -EINVAL; 512 } 513 if (!(tfo->fabric_drop_wwn)) { 514 printk(KERN_ERR "Missing tfo->fabric_drop_wwn()\n"); 515 return -EINVAL; 516 } 517 if (!(tfo->fabric_make_tpg)) { 518 printk(KERN_ERR "Missing tfo->fabric_make_tpg()\n"); 519 return -EINVAL; 520 } 521 if (!(tfo->fabric_drop_tpg)) { 522 printk(KERN_ERR "Missing tfo->fabric_drop_tpg()\n"); 523 return -EINVAL; 524 } 525 526 return 0; 527 } 528 529 /* 530 * Called 2nd from fabric module with returned parameter of 531 * struct target_fabric_configfs * from target_fabric_configfs_init(). 532 * 533 * Upon a successful registration, the new fabric's struct config_item is 534 * return. Also, a pointer to this struct is set in the passed 535 * struct target_fabric_configfs. 536 */ 537 int target_fabric_configfs_register( 538 struct target_fabric_configfs *tf) 539 { 540 struct config_group *su_group; 541 int ret; 542 543 if (!(tf)) { 544 printk(KERN_ERR "Unable to locate target_fabric_configfs" 545 " pointer\n"); 546 return -EINVAL; 547 } 548 if (!(tf->tf_subsys)) { 549 printk(KERN_ERR "Unable to target struct config_subsystem" 550 " pointer\n"); 551 return -EINVAL; 552 } 553 su_group = &tf->tf_subsys->su_group; 554 if (!(su_group)) { 555 printk(KERN_ERR "Unable to locate target struct config_group" 556 " pointer\n"); 557 return -EINVAL; 558 } 559 ret = target_fabric_tf_ops_check(tf); 560 if (ret < 0) 561 return ret; 562 563 printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>" 564 ">>>>>>>>>>\n"); 565 return 0; 566 } 567 EXPORT_SYMBOL(target_fabric_configfs_register); 568 569 void target_fabric_configfs_deregister( 570 struct target_fabric_configfs *tf) 571 { 572 struct config_group *su_group; 573 struct configfs_subsystem *su; 574 575 if (!(tf)) { 576 printk(KERN_ERR "Unable to locate passed target_fabric_" 577 "configfs\n"); 578 return; 579 } 580 su = tf->tf_subsys; 581 if (!(su)) { 582 printk(KERN_ERR "Unable to locate passed tf->tf_subsys" 583 " pointer\n"); 584 return; 585 } 586 su_group = &tf->tf_subsys->su_group; 587 if (!(su_group)) { 588 printk(KERN_ERR "Unable to locate target struct config_group" 589 " pointer\n"); 590 return; 591 } 592 593 printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>" 594 ">>>>>>>>>>>>\n"); 595 mutex_lock(&g_tf_lock); 596 if (atomic_read(&tf->tf_access_cnt)) { 597 mutex_unlock(&g_tf_lock); 598 printk(KERN_ERR "Non zero tf->tf_access_cnt for fabric %s\n", 599 tf->tf_name); 600 BUG(); 601 } 602 list_del(&tf->tf_list); 603 mutex_unlock(&g_tf_lock); 604 605 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing tf:" 606 " %s\n", tf->tf_name); 607 tf->tf_module = NULL; 608 tf->tf_subsys = NULL; 609 kfree(tf); 610 611 printk("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>" 612 ">>>>>\n"); 613 return; 614 } 615 EXPORT_SYMBOL(target_fabric_configfs_deregister); 616 617 /*############################################################################## 618 // Stop functions called by external Target Fabrics Modules 619 //############################################################################*/ 620 621 /* Start functions for struct config_item_type target_core_dev_attrib_cit */ 622 623 #define DEF_DEV_ATTRIB_SHOW(_name) \ 624 static ssize_t target_core_dev_show_attr_##_name( \ 625 struct se_dev_attrib *da, \ 626 char *page) \ 627 { \ 628 struct se_device *dev; \ 629 struct se_subsystem_dev *se_dev = da->da_sub_dev; \ 630 ssize_t rb; \ 631 \ 632 spin_lock(&se_dev->se_dev_lock); \ 633 dev = se_dev->se_dev_ptr; \ 634 if (!(dev)) { \ 635 spin_unlock(&se_dev->se_dev_lock); \ 636 return -ENODEV; \ 637 } \ 638 rb = snprintf(page, PAGE_SIZE, "%u\n", (u32)DEV_ATTRIB(dev)->_name); \ 639 spin_unlock(&se_dev->se_dev_lock); \ 640 \ 641 return rb; \ 642 } 643 644 #define DEF_DEV_ATTRIB_STORE(_name) \ 645 static ssize_t target_core_dev_store_attr_##_name( \ 646 struct se_dev_attrib *da, \ 647 const char *page, \ 648 size_t count) \ 649 { \ 650 struct se_device *dev; \ 651 struct se_subsystem_dev *se_dev = da->da_sub_dev; \ 652 unsigned long val; \ 653 int ret; \ 654 \ 655 spin_lock(&se_dev->se_dev_lock); \ 656 dev = se_dev->se_dev_ptr; \ 657 if (!(dev)) { \ 658 spin_unlock(&se_dev->se_dev_lock); \ 659 return -ENODEV; \ 660 } \ 661 ret = strict_strtoul(page, 0, &val); \ 662 if (ret < 0) { \ 663 spin_unlock(&se_dev->se_dev_lock); \ 664 printk(KERN_ERR "strict_strtoul() failed with" \ 665 " ret: %d\n", ret); \ 666 return -EINVAL; \ 667 } \ 668 ret = se_dev_set_##_name(dev, (u32)val); \ 669 spin_unlock(&se_dev->se_dev_lock); \ 670 \ 671 return (!ret) ? count : -EINVAL; \ 672 } 673 674 #define DEF_DEV_ATTRIB(_name) \ 675 DEF_DEV_ATTRIB_SHOW(_name); \ 676 DEF_DEV_ATTRIB_STORE(_name); 677 678 #define DEF_DEV_ATTRIB_RO(_name) \ 679 DEF_DEV_ATTRIB_SHOW(_name); 680 681 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib); 682 #define SE_DEV_ATTR(_name, _mode) \ 683 static struct target_core_dev_attrib_attribute \ 684 target_core_dev_attrib_##_name = \ 685 __CONFIGFS_EATTR(_name, _mode, \ 686 target_core_dev_show_attr_##_name, \ 687 target_core_dev_store_attr_##_name); 688 689 #define SE_DEV_ATTR_RO(_name); \ 690 static struct target_core_dev_attrib_attribute \ 691 target_core_dev_attrib_##_name = \ 692 __CONFIGFS_EATTR_RO(_name, \ 693 target_core_dev_show_attr_##_name); 694 695 DEF_DEV_ATTRIB(emulate_dpo); 696 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR); 697 698 DEF_DEV_ATTRIB(emulate_fua_write); 699 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR); 700 701 DEF_DEV_ATTRIB(emulate_fua_read); 702 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR); 703 704 DEF_DEV_ATTRIB(emulate_write_cache); 705 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR); 706 707 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl); 708 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR); 709 710 DEF_DEV_ATTRIB(emulate_tas); 711 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR); 712 713 DEF_DEV_ATTRIB(emulate_tpu); 714 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR); 715 716 DEF_DEV_ATTRIB(emulate_tpws); 717 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR); 718 719 DEF_DEV_ATTRIB(enforce_pr_isids); 720 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR); 721 722 DEF_DEV_ATTRIB_RO(hw_block_size); 723 SE_DEV_ATTR_RO(hw_block_size); 724 725 DEF_DEV_ATTRIB(block_size); 726 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR); 727 728 DEF_DEV_ATTRIB_RO(hw_max_sectors); 729 SE_DEV_ATTR_RO(hw_max_sectors); 730 731 DEF_DEV_ATTRIB(max_sectors); 732 SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR); 733 734 DEF_DEV_ATTRIB(optimal_sectors); 735 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR); 736 737 DEF_DEV_ATTRIB_RO(hw_queue_depth); 738 SE_DEV_ATTR_RO(hw_queue_depth); 739 740 DEF_DEV_ATTRIB(queue_depth); 741 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR); 742 743 DEF_DEV_ATTRIB(task_timeout); 744 SE_DEV_ATTR(task_timeout, S_IRUGO | S_IWUSR); 745 746 DEF_DEV_ATTRIB(max_unmap_lba_count); 747 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR); 748 749 DEF_DEV_ATTRIB(max_unmap_block_desc_count); 750 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR); 751 752 DEF_DEV_ATTRIB(unmap_granularity); 753 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR); 754 755 DEF_DEV_ATTRIB(unmap_granularity_alignment); 756 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR); 757 758 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group); 759 760 static struct configfs_attribute *target_core_dev_attrib_attrs[] = { 761 &target_core_dev_attrib_emulate_dpo.attr, 762 &target_core_dev_attrib_emulate_fua_write.attr, 763 &target_core_dev_attrib_emulate_fua_read.attr, 764 &target_core_dev_attrib_emulate_write_cache.attr, 765 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr, 766 &target_core_dev_attrib_emulate_tas.attr, 767 &target_core_dev_attrib_emulate_tpu.attr, 768 &target_core_dev_attrib_emulate_tpws.attr, 769 &target_core_dev_attrib_enforce_pr_isids.attr, 770 &target_core_dev_attrib_hw_block_size.attr, 771 &target_core_dev_attrib_block_size.attr, 772 &target_core_dev_attrib_hw_max_sectors.attr, 773 &target_core_dev_attrib_max_sectors.attr, 774 &target_core_dev_attrib_optimal_sectors.attr, 775 &target_core_dev_attrib_hw_queue_depth.attr, 776 &target_core_dev_attrib_queue_depth.attr, 777 &target_core_dev_attrib_task_timeout.attr, 778 &target_core_dev_attrib_max_unmap_lba_count.attr, 779 &target_core_dev_attrib_max_unmap_block_desc_count.attr, 780 &target_core_dev_attrib_unmap_granularity.attr, 781 &target_core_dev_attrib_unmap_granularity_alignment.attr, 782 NULL, 783 }; 784 785 static struct configfs_item_operations target_core_dev_attrib_ops = { 786 .show_attribute = target_core_dev_attrib_attr_show, 787 .store_attribute = target_core_dev_attrib_attr_store, 788 }; 789 790 static struct config_item_type target_core_dev_attrib_cit = { 791 .ct_item_ops = &target_core_dev_attrib_ops, 792 .ct_attrs = target_core_dev_attrib_attrs, 793 .ct_owner = THIS_MODULE, 794 }; 795 796 /* End functions for struct config_item_type target_core_dev_attrib_cit */ 797 798 /* Start functions for struct config_item_type target_core_dev_wwn_cit */ 799 800 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn); 801 #define SE_DEV_WWN_ATTR(_name, _mode) \ 802 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \ 803 __CONFIGFS_EATTR(_name, _mode, \ 804 target_core_dev_wwn_show_attr_##_name, \ 805 target_core_dev_wwn_store_attr_##_name); 806 807 #define SE_DEV_WWN_ATTR_RO(_name); \ 808 do { \ 809 static struct target_core_dev_wwn_attribute \ 810 target_core_dev_wwn_##_name = \ 811 __CONFIGFS_EATTR_RO(_name, \ 812 target_core_dev_wwn_show_attr_##_name); \ 813 } while (0); 814 815 /* 816 * VPD page 0x80 Unit serial 817 */ 818 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial( 819 struct t10_wwn *t10_wwn, 820 char *page) 821 { 822 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; 823 struct se_device *dev; 824 825 dev = se_dev->se_dev_ptr; 826 if (!(dev)) 827 return -ENODEV; 828 829 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 830 &t10_wwn->unit_serial[0]); 831 } 832 833 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial( 834 struct t10_wwn *t10_wwn, 835 const char *page, 836 size_t count) 837 { 838 struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev; 839 struct se_device *dev; 840 unsigned char buf[INQUIRY_VPD_SERIAL_LEN]; 841 842 /* 843 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 844 * from the struct scsi_device level firmware, do not allow 845 * VPD Unit Serial to be emulated. 846 * 847 * Note this struct scsi_device could also be emulating VPD 848 * information from its drivers/scsi LLD. But for now we assume 849 * it is doing 'the right thing' wrt a world wide unique 850 * VPD Unit Serial Number that OS dependent multipath can depend on. 851 */ 852 if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) { 853 printk(KERN_ERR "Underlying SCSI device firmware provided VPD" 854 " Unit Serial, ignoring request\n"); 855 return -EOPNOTSUPP; 856 } 857 858 if ((strlen(page) + 1) > INQUIRY_VPD_SERIAL_LEN) { 859 printk(KERN_ERR "Emulated VPD Unit Serial exceeds" 860 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 861 return -EOVERFLOW; 862 } 863 /* 864 * Check to see if any active $FABRIC_MOD exports exist. If they 865 * do exist, fail here as changing this information on the fly 866 * (underneath the initiator side OS dependent multipath code) 867 * could cause negative effects. 868 */ 869 dev = su_dev->se_dev_ptr; 870 if ((dev)) { 871 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 872 printk(KERN_ERR "Unable to set VPD Unit Serial while" 873 " active %d $FABRIC_MOD exports exist\n", 874 atomic_read(&dev->dev_export_obj.obj_access_count)); 875 return -EINVAL; 876 } 877 } 878 /* 879 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 880 * 881 * Also, strip any newline added from the userspace 882 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 883 */ 884 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN); 885 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 886 snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 887 "%s", strstrip(buf)); 888 su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL; 889 890 printk(KERN_INFO "Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 891 " %s\n", su_dev->t10_wwn.unit_serial); 892 893 return count; 894 } 895 896 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR); 897 898 /* 899 * VPD page 0x83 Protocol Identifier 900 */ 901 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier( 902 struct t10_wwn *t10_wwn, 903 char *page) 904 { 905 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; 906 struct se_device *dev; 907 struct t10_vpd *vpd; 908 unsigned char buf[VPD_TMP_BUF_SIZE]; 909 ssize_t len = 0; 910 911 dev = se_dev->se_dev_ptr; 912 if (!(dev)) 913 return -ENODEV; 914 915 memset(buf, 0, VPD_TMP_BUF_SIZE); 916 917 spin_lock(&t10_wwn->t10_vpd_lock); 918 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 919 if (!(vpd->protocol_identifier_set)) 920 continue; 921 922 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 923 924 if ((len + strlen(buf) > PAGE_SIZE)) 925 break; 926 927 len += sprintf(page+len, "%s", buf); 928 } 929 spin_unlock(&t10_wwn->t10_vpd_lock); 930 931 return len; 932 } 933 934 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier( 935 struct t10_wwn *t10_wwn, 936 const char *page, 937 size_t count) 938 { 939 return -ENOSYS; 940 } 941 942 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR); 943 944 /* 945 * Generic wrapper for dumping VPD identifiers by association. 946 */ 947 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 948 static ssize_t target_core_dev_wwn_show_attr_##_name( \ 949 struct t10_wwn *t10_wwn, \ 950 char *page) \ 951 { \ 952 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; \ 953 struct se_device *dev; \ 954 struct t10_vpd *vpd; \ 955 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 956 ssize_t len = 0; \ 957 \ 958 dev = se_dev->se_dev_ptr; \ 959 if (!(dev)) \ 960 return -ENODEV; \ 961 \ 962 spin_lock(&t10_wwn->t10_vpd_lock); \ 963 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 964 if (vpd->association != _assoc) \ 965 continue; \ 966 \ 967 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 968 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 969 if ((len + strlen(buf) > PAGE_SIZE)) \ 970 break; \ 971 len += sprintf(page+len, "%s", buf); \ 972 \ 973 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 974 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 975 if ((len + strlen(buf) > PAGE_SIZE)) \ 976 break; \ 977 len += sprintf(page+len, "%s", buf); \ 978 \ 979 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 980 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 981 if ((len + strlen(buf) > PAGE_SIZE)) \ 982 break; \ 983 len += sprintf(page+len, "%s", buf); \ 984 } \ 985 spin_unlock(&t10_wwn->t10_vpd_lock); \ 986 \ 987 return len; \ 988 } 989 990 /* 991 * VPD page 0x83 Assoication: Logical Unit 992 */ 993 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 994 995 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit( 996 struct t10_wwn *t10_wwn, 997 const char *page, 998 size_t count) 999 { 1000 return -ENOSYS; 1001 } 1002 1003 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR); 1004 1005 /* 1006 * VPD page 0x83 Association: Target Port 1007 */ 1008 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 1009 1010 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port( 1011 struct t10_wwn *t10_wwn, 1012 const char *page, 1013 size_t count) 1014 { 1015 return -ENOSYS; 1016 } 1017 1018 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR); 1019 1020 /* 1021 * VPD page 0x83 Association: SCSI Target Device 1022 */ 1023 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 1024 1025 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device( 1026 struct t10_wwn *t10_wwn, 1027 const char *page, 1028 size_t count) 1029 { 1030 return -ENOSYS; 1031 } 1032 1033 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR); 1034 1035 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group); 1036 1037 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 1038 &target_core_dev_wwn_vpd_unit_serial.attr, 1039 &target_core_dev_wwn_vpd_protocol_identifier.attr, 1040 &target_core_dev_wwn_vpd_assoc_logical_unit.attr, 1041 &target_core_dev_wwn_vpd_assoc_target_port.attr, 1042 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr, 1043 NULL, 1044 }; 1045 1046 static struct configfs_item_operations target_core_dev_wwn_ops = { 1047 .show_attribute = target_core_dev_wwn_attr_show, 1048 .store_attribute = target_core_dev_wwn_attr_store, 1049 }; 1050 1051 static struct config_item_type target_core_dev_wwn_cit = { 1052 .ct_item_ops = &target_core_dev_wwn_ops, 1053 .ct_attrs = target_core_dev_wwn_attrs, 1054 .ct_owner = THIS_MODULE, 1055 }; 1056 1057 /* End functions for struct config_item_type target_core_dev_wwn_cit */ 1058 1059 /* Start functions for struct config_item_type target_core_dev_pr_cit */ 1060 1061 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev); 1062 #define SE_DEV_PR_ATTR(_name, _mode) \ 1063 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 1064 __CONFIGFS_EATTR(_name, _mode, \ 1065 target_core_dev_pr_show_attr_##_name, \ 1066 target_core_dev_pr_store_attr_##_name); 1067 1068 #define SE_DEV_PR_ATTR_RO(_name); \ 1069 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 1070 __CONFIGFS_EATTR_RO(_name, \ 1071 target_core_dev_pr_show_attr_##_name); 1072 1073 /* 1074 * res_holder 1075 */ 1076 static ssize_t target_core_dev_pr_show_spc3_res( 1077 struct se_device *dev, 1078 char *page, 1079 ssize_t *len) 1080 { 1081 struct se_node_acl *se_nacl; 1082 struct t10_pr_registration *pr_reg; 1083 char i_buf[PR_REG_ISID_ID_LEN]; 1084 int prf_isid; 1085 1086 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1087 1088 spin_lock(&dev->dev_reservation_lock); 1089 pr_reg = dev->dev_pr_res_holder; 1090 if (!(pr_reg)) { 1091 *len += sprintf(page + *len, "No SPC-3 Reservation holder\n"); 1092 spin_unlock(&dev->dev_reservation_lock); 1093 return *len; 1094 } 1095 se_nacl = pr_reg->pr_reg_nacl; 1096 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 1097 PR_REG_ISID_ID_LEN); 1098 1099 *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n", 1100 TPG_TFO(se_nacl->se_tpg)->get_fabric_name(), 1101 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : ""); 1102 spin_unlock(&dev->dev_reservation_lock); 1103 1104 return *len; 1105 } 1106 1107 static ssize_t target_core_dev_pr_show_spc2_res( 1108 struct se_device *dev, 1109 char *page, 1110 ssize_t *len) 1111 { 1112 struct se_node_acl *se_nacl; 1113 1114 spin_lock(&dev->dev_reservation_lock); 1115 se_nacl = dev->dev_reserved_node_acl; 1116 if (!(se_nacl)) { 1117 *len += sprintf(page + *len, "No SPC-2 Reservation holder\n"); 1118 spin_unlock(&dev->dev_reservation_lock); 1119 return *len; 1120 } 1121 *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n", 1122 TPG_TFO(se_nacl->se_tpg)->get_fabric_name(), 1123 se_nacl->initiatorname); 1124 spin_unlock(&dev->dev_reservation_lock); 1125 1126 return *len; 1127 } 1128 1129 static ssize_t target_core_dev_pr_show_attr_res_holder( 1130 struct se_subsystem_dev *su_dev, 1131 char *page) 1132 { 1133 ssize_t len = 0; 1134 1135 if (!(su_dev->se_dev_ptr)) 1136 return -ENODEV; 1137 1138 switch (T10_RES(su_dev)->res_type) { 1139 case SPC3_PERSISTENT_RESERVATIONS: 1140 target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr, 1141 page, &len); 1142 break; 1143 case SPC2_RESERVATIONS: 1144 target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr, 1145 page, &len); 1146 break; 1147 case SPC_PASSTHROUGH: 1148 len += sprintf(page+len, "Passthrough\n"); 1149 break; 1150 default: 1151 len += sprintf(page+len, "Unknown\n"); 1152 break; 1153 } 1154 1155 return len; 1156 } 1157 1158 SE_DEV_PR_ATTR_RO(res_holder); 1159 1160 /* 1161 * res_pr_all_tgt_pts 1162 */ 1163 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts( 1164 struct se_subsystem_dev *su_dev, 1165 char *page) 1166 { 1167 struct se_device *dev; 1168 struct t10_pr_registration *pr_reg; 1169 ssize_t len = 0; 1170 1171 dev = su_dev->se_dev_ptr; 1172 if (!(dev)) 1173 return -ENODEV; 1174 1175 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS) 1176 return len; 1177 1178 spin_lock(&dev->dev_reservation_lock); 1179 pr_reg = dev->dev_pr_res_holder; 1180 if (!(pr_reg)) { 1181 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1182 spin_unlock(&dev->dev_reservation_lock); 1183 return len; 1184 } 1185 /* 1186 * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3 1187 * Basic PERSISTENT RESERVER OUT parameter list, page 290 1188 */ 1189 if (pr_reg->pr_reg_all_tg_pt) 1190 len = sprintf(page, "SPC-3 Reservation: All Target" 1191 " Ports registration\n"); 1192 else 1193 len = sprintf(page, "SPC-3 Reservation: Single" 1194 " Target Port registration\n"); 1195 spin_unlock(&dev->dev_reservation_lock); 1196 1197 return len; 1198 } 1199 1200 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts); 1201 1202 /* 1203 * res_pr_generation 1204 */ 1205 static ssize_t target_core_dev_pr_show_attr_res_pr_generation( 1206 struct se_subsystem_dev *su_dev, 1207 char *page) 1208 { 1209 if (!(su_dev->se_dev_ptr)) 1210 return -ENODEV; 1211 1212 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS) 1213 return 0; 1214 1215 return sprintf(page, "0x%08x\n", T10_RES(su_dev)->pr_generation); 1216 } 1217 1218 SE_DEV_PR_ATTR_RO(res_pr_generation); 1219 1220 /* 1221 * res_pr_holder_tg_port 1222 */ 1223 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port( 1224 struct se_subsystem_dev *su_dev, 1225 char *page) 1226 { 1227 struct se_device *dev; 1228 struct se_node_acl *se_nacl; 1229 struct se_lun *lun; 1230 struct se_portal_group *se_tpg; 1231 struct t10_pr_registration *pr_reg; 1232 struct target_core_fabric_ops *tfo; 1233 ssize_t len = 0; 1234 1235 dev = su_dev->se_dev_ptr; 1236 if (!(dev)) 1237 return -ENODEV; 1238 1239 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS) 1240 return len; 1241 1242 spin_lock(&dev->dev_reservation_lock); 1243 pr_reg = dev->dev_pr_res_holder; 1244 if (!(pr_reg)) { 1245 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1246 spin_unlock(&dev->dev_reservation_lock); 1247 return len; 1248 } 1249 se_nacl = pr_reg->pr_reg_nacl; 1250 se_tpg = se_nacl->se_tpg; 1251 lun = pr_reg->pr_reg_tg_pt_lun; 1252 tfo = TPG_TFO(se_tpg); 1253 1254 len += sprintf(page+len, "SPC-3 Reservation: %s" 1255 " Target Node Endpoint: %s\n", tfo->get_fabric_name(), 1256 tfo->tpg_get_wwn(se_tpg)); 1257 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1258 " Identifer Tag: %hu %s Portal Group Tag: %hu" 1259 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi, 1260 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg), 1261 tfo->get_fabric_name(), lun->unpacked_lun); 1262 spin_unlock(&dev->dev_reservation_lock); 1263 1264 return len; 1265 } 1266 1267 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port); 1268 1269 /* 1270 * res_pr_registered_i_pts 1271 */ 1272 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts( 1273 struct se_subsystem_dev *su_dev, 1274 char *page) 1275 { 1276 struct target_core_fabric_ops *tfo; 1277 struct t10_pr_registration *pr_reg; 1278 unsigned char buf[384]; 1279 char i_buf[PR_REG_ISID_ID_LEN]; 1280 ssize_t len = 0; 1281 int reg_count = 0, prf_isid; 1282 1283 if (!(su_dev->se_dev_ptr)) 1284 return -ENODEV; 1285 1286 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS) 1287 return len; 1288 1289 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1290 1291 spin_lock(&T10_RES(su_dev)->registration_lock); 1292 list_for_each_entry(pr_reg, &T10_RES(su_dev)->registration_list, 1293 pr_reg_list) { 1294 1295 memset(buf, 0, 384); 1296 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1297 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1298 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 1299 PR_REG_ISID_ID_LEN); 1300 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1301 tfo->get_fabric_name(), 1302 pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ? 1303 &i_buf[0] : "", pr_reg->pr_res_key, 1304 pr_reg->pr_res_generation); 1305 1306 if ((len + strlen(buf) > PAGE_SIZE)) 1307 break; 1308 1309 len += sprintf(page+len, "%s", buf); 1310 reg_count++; 1311 } 1312 spin_unlock(&T10_RES(su_dev)->registration_lock); 1313 1314 if (!(reg_count)) 1315 len += sprintf(page+len, "None\n"); 1316 1317 return len; 1318 } 1319 1320 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts); 1321 1322 /* 1323 * res_pr_type 1324 */ 1325 static ssize_t target_core_dev_pr_show_attr_res_pr_type( 1326 struct se_subsystem_dev *su_dev, 1327 char *page) 1328 { 1329 struct se_device *dev; 1330 struct t10_pr_registration *pr_reg; 1331 ssize_t len = 0; 1332 1333 dev = su_dev->se_dev_ptr; 1334 if (!(dev)) 1335 return -ENODEV; 1336 1337 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS) 1338 return len; 1339 1340 spin_lock(&dev->dev_reservation_lock); 1341 pr_reg = dev->dev_pr_res_holder; 1342 if (!(pr_reg)) { 1343 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1344 spin_unlock(&dev->dev_reservation_lock); 1345 return len; 1346 } 1347 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1348 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 1349 spin_unlock(&dev->dev_reservation_lock); 1350 1351 return len; 1352 } 1353 1354 SE_DEV_PR_ATTR_RO(res_pr_type); 1355 1356 /* 1357 * res_type 1358 */ 1359 static ssize_t target_core_dev_pr_show_attr_res_type( 1360 struct se_subsystem_dev *su_dev, 1361 char *page) 1362 { 1363 ssize_t len = 0; 1364 1365 if (!(su_dev->se_dev_ptr)) 1366 return -ENODEV; 1367 1368 switch (T10_RES(su_dev)->res_type) { 1369 case SPC3_PERSISTENT_RESERVATIONS: 1370 len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 1371 break; 1372 case SPC2_RESERVATIONS: 1373 len = sprintf(page, "SPC2_RESERVATIONS\n"); 1374 break; 1375 case SPC_PASSTHROUGH: 1376 len = sprintf(page, "SPC_PASSTHROUGH\n"); 1377 break; 1378 default: 1379 len = sprintf(page, "UNKNOWN\n"); 1380 break; 1381 } 1382 1383 return len; 1384 } 1385 1386 SE_DEV_PR_ATTR_RO(res_type); 1387 1388 /* 1389 * res_aptpl_active 1390 */ 1391 1392 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active( 1393 struct se_subsystem_dev *su_dev, 1394 char *page) 1395 { 1396 if (!(su_dev->se_dev_ptr)) 1397 return -ENODEV; 1398 1399 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS) 1400 return 0; 1401 1402 return sprintf(page, "APTPL Bit Status: %s\n", 1403 (T10_RES(su_dev)->pr_aptpl_active) ? "Activated" : "Disabled"); 1404 } 1405 1406 SE_DEV_PR_ATTR_RO(res_aptpl_active); 1407 1408 /* 1409 * res_aptpl_metadata 1410 */ 1411 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata( 1412 struct se_subsystem_dev *su_dev, 1413 char *page) 1414 { 1415 if (!(su_dev->se_dev_ptr)) 1416 return -ENODEV; 1417 1418 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS) 1419 return 0; 1420 1421 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 1422 } 1423 1424 enum { 1425 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 1426 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 1427 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 1428 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 1429 }; 1430 1431 static match_table_t tokens = { 1432 {Opt_initiator_fabric, "initiator_fabric=%s"}, 1433 {Opt_initiator_node, "initiator_node=%s"}, 1434 {Opt_initiator_sid, "initiator_sid=%s"}, 1435 {Opt_sa_res_key, "sa_res_key=%s"}, 1436 {Opt_res_holder, "res_holder=%d"}, 1437 {Opt_res_type, "res_type=%d"}, 1438 {Opt_res_scope, "res_scope=%d"}, 1439 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 1440 {Opt_mapped_lun, "mapped_lun=%d"}, 1441 {Opt_target_fabric, "target_fabric=%s"}, 1442 {Opt_target_node, "target_node=%s"}, 1443 {Opt_tpgt, "tpgt=%d"}, 1444 {Opt_port_rtpi, "port_rtpi=%d"}, 1445 {Opt_target_lun, "target_lun=%d"}, 1446 {Opt_err, NULL} 1447 }; 1448 1449 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata( 1450 struct se_subsystem_dev *su_dev, 1451 const char *page, 1452 size_t count) 1453 { 1454 struct se_device *dev; 1455 unsigned char *i_fabric, *t_fabric, *i_port = NULL, *t_port = NULL; 1456 unsigned char *isid = NULL; 1457 char *orig, *ptr, *arg_p, *opts; 1458 substring_t args[MAX_OPT_ARGS]; 1459 unsigned long long tmp_ll; 1460 u64 sa_res_key = 0; 1461 u32 mapped_lun = 0, target_lun = 0; 1462 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 1463 u16 port_rpti = 0, tpgt = 0; 1464 u8 type = 0, scope; 1465 1466 dev = su_dev->se_dev_ptr; 1467 if (!(dev)) 1468 return -ENODEV; 1469 1470 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS) 1471 return 0; 1472 1473 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1474 printk(KERN_INFO "Unable to process APTPL metadata while" 1475 " active fabric exports exist\n"); 1476 return -EINVAL; 1477 } 1478 1479 opts = kstrdup(page, GFP_KERNEL); 1480 if (!opts) 1481 return -ENOMEM; 1482 1483 orig = opts; 1484 while ((ptr = strsep(&opts, ",")) != NULL) { 1485 if (!*ptr) 1486 continue; 1487 1488 token = match_token(ptr, tokens, args); 1489 switch (token) { 1490 case Opt_initiator_fabric: 1491 i_fabric = match_strdup(&args[0]); 1492 break; 1493 case Opt_initiator_node: 1494 i_port = match_strdup(&args[0]); 1495 if (strlen(i_port) > PR_APTPL_MAX_IPORT_LEN) { 1496 printk(KERN_ERR "APTPL metadata initiator_node=" 1497 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 1498 PR_APTPL_MAX_IPORT_LEN); 1499 ret = -EINVAL; 1500 break; 1501 } 1502 break; 1503 case Opt_initiator_sid: 1504 isid = match_strdup(&args[0]); 1505 if (strlen(isid) > PR_REG_ISID_LEN) { 1506 printk(KERN_ERR "APTPL metadata initiator_isid" 1507 "= exceeds PR_REG_ISID_LEN: %d\n", 1508 PR_REG_ISID_LEN); 1509 ret = -EINVAL; 1510 break; 1511 } 1512 break; 1513 case Opt_sa_res_key: 1514 arg_p = match_strdup(&args[0]); 1515 ret = strict_strtoull(arg_p, 0, &tmp_ll); 1516 if (ret < 0) { 1517 printk(KERN_ERR "strict_strtoull() failed for" 1518 " sa_res_key=\n"); 1519 goto out; 1520 } 1521 sa_res_key = (u64)tmp_ll; 1522 break; 1523 /* 1524 * PR APTPL Metadata for Reservation 1525 */ 1526 case Opt_res_holder: 1527 match_int(args, &arg); 1528 res_holder = arg; 1529 break; 1530 case Opt_res_type: 1531 match_int(args, &arg); 1532 type = (u8)arg; 1533 break; 1534 case Opt_res_scope: 1535 match_int(args, &arg); 1536 scope = (u8)arg; 1537 break; 1538 case Opt_res_all_tg_pt: 1539 match_int(args, &arg); 1540 all_tg_pt = (int)arg; 1541 break; 1542 case Opt_mapped_lun: 1543 match_int(args, &arg); 1544 mapped_lun = (u32)arg; 1545 break; 1546 /* 1547 * PR APTPL Metadata for Target Port 1548 */ 1549 case Opt_target_fabric: 1550 t_fabric = match_strdup(&args[0]); 1551 break; 1552 case Opt_target_node: 1553 t_port = match_strdup(&args[0]); 1554 if (strlen(t_port) > PR_APTPL_MAX_TPORT_LEN) { 1555 printk(KERN_ERR "APTPL metadata target_node=" 1556 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 1557 PR_APTPL_MAX_TPORT_LEN); 1558 ret = -EINVAL; 1559 break; 1560 } 1561 break; 1562 case Opt_tpgt: 1563 match_int(args, &arg); 1564 tpgt = (u16)arg; 1565 break; 1566 case Opt_port_rtpi: 1567 match_int(args, &arg); 1568 port_rpti = (u16)arg; 1569 break; 1570 case Opt_target_lun: 1571 match_int(args, &arg); 1572 target_lun = (u32)arg; 1573 break; 1574 default: 1575 break; 1576 } 1577 } 1578 1579 if (!(i_port) || !(t_port) || !(sa_res_key)) { 1580 printk(KERN_ERR "Illegal parameters for APTPL registration\n"); 1581 ret = -EINVAL; 1582 goto out; 1583 } 1584 1585 if (res_holder && !(type)) { 1586 printk(KERN_ERR "Illegal PR type: 0x%02x for reservation" 1587 " holder\n", type); 1588 ret = -EINVAL; 1589 goto out; 1590 } 1591 1592 ret = core_scsi3_alloc_aptpl_registration(T10_RES(su_dev), sa_res_key, 1593 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 1594 res_holder, all_tg_pt, type); 1595 out: 1596 kfree(orig); 1597 return (ret == 0) ? count : ret; 1598 } 1599 1600 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR); 1601 1602 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group); 1603 1604 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 1605 &target_core_dev_pr_res_holder.attr, 1606 &target_core_dev_pr_res_pr_all_tgt_pts.attr, 1607 &target_core_dev_pr_res_pr_generation.attr, 1608 &target_core_dev_pr_res_pr_holder_tg_port.attr, 1609 &target_core_dev_pr_res_pr_registered_i_pts.attr, 1610 &target_core_dev_pr_res_pr_type.attr, 1611 &target_core_dev_pr_res_type.attr, 1612 &target_core_dev_pr_res_aptpl_active.attr, 1613 &target_core_dev_pr_res_aptpl_metadata.attr, 1614 NULL, 1615 }; 1616 1617 static struct configfs_item_operations target_core_dev_pr_ops = { 1618 .show_attribute = target_core_dev_pr_attr_show, 1619 .store_attribute = target_core_dev_pr_attr_store, 1620 }; 1621 1622 static struct config_item_type target_core_dev_pr_cit = { 1623 .ct_item_ops = &target_core_dev_pr_ops, 1624 .ct_attrs = target_core_dev_pr_attrs, 1625 .ct_owner = THIS_MODULE, 1626 }; 1627 1628 /* End functions for struct config_item_type target_core_dev_pr_cit */ 1629 1630 /* Start functions for struct config_item_type target_core_dev_cit */ 1631 1632 static ssize_t target_core_show_dev_info(void *p, char *page) 1633 { 1634 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1635 struct se_hba *hba = se_dev->se_dev_hba; 1636 struct se_subsystem_api *t = hba->transport; 1637 int bl = 0; 1638 ssize_t read_bytes = 0; 1639 1640 if (!(se_dev->se_dev_ptr)) 1641 return -ENODEV; 1642 1643 transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl); 1644 read_bytes += bl; 1645 read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes); 1646 return read_bytes; 1647 } 1648 1649 static struct target_core_configfs_attribute target_core_attr_dev_info = { 1650 .attr = { .ca_owner = THIS_MODULE, 1651 .ca_name = "info", 1652 .ca_mode = S_IRUGO }, 1653 .show = target_core_show_dev_info, 1654 .store = NULL, 1655 }; 1656 1657 static ssize_t target_core_store_dev_control( 1658 void *p, 1659 const char *page, 1660 size_t count) 1661 { 1662 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1663 struct se_hba *hba = se_dev->se_dev_hba; 1664 struct se_subsystem_api *t = hba->transport; 1665 1666 if (!(se_dev->se_dev_su_ptr)) { 1667 printk(KERN_ERR "Unable to locate struct se_subsystem_dev>se" 1668 "_dev_su_ptr\n"); 1669 return -EINVAL; 1670 } 1671 1672 return t->set_configfs_dev_params(hba, se_dev, page, count); 1673 } 1674 1675 static struct target_core_configfs_attribute target_core_attr_dev_control = { 1676 .attr = { .ca_owner = THIS_MODULE, 1677 .ca_name = "control", 1678 .ca_mode = S_IWUSR }, 1679 .show = NULL, 1680 .store = target_core_store_dev_control, 1681 }; 1682 1683 static ssize_t target_core_show_dev_alias(void *p, char *page) 1684 { 1685 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1686 1687 if (!(se_dev->su_dev_flags & SDF_USING_ALIAS)) 1688 return 0; 1689 1690 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias); 1691 } 1692 1693 static ssize_t target_core_store_dev_alias( 1694 void *p, 1695 const char *page, 1696 size_t count) 1697 { 1698 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1699 struct se_hba *hba = se_dev->se_dev_hba; 1700 ssize_t read_bytes; 1701 1702 if (count > (SE_DEV_ALIAS_LEN-1)) { 1703 printk(KERN_ERR "alias count: %d exceeds" 1704 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 1705 SE_DEV_ALIAS_LEN-1); 1706 return -EINVAL; 1707 } 1708 1709 se_dev->su_dev_flags |= SDF_USING_ALIAS; 1710 read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN, 1711 "%s", page); 1712 1713 printk(KERN_INFO "Target_Core_ConfigFS: %s/%s set alias: %s\n", 1714 config_item_name(&hba->hba_group.cg_item), 1715 config_item_name(&se_dev->se_dev_group.cg_item), 1716 se_dev->se_dev_alias); 1717 1718 return read_bytes; 1719 } 1720 1721 static struct target_core_configfs_attribute target_core_attr_dev_alias = { 1722 .attr = { .ca_owner = THIS_MODULE, 1723 .ca_name = "alias", 1724 .ca_mode = S_IRUGO | S_IWUSR }, 1725 .show = target_core_show_dev_alias, 1726 .store = target_core_store_dev_alias, 1727 }; 1728 1729 static ssize_t target_core_show_dev_udev_path(void *p, char *page) 1730 { 1731 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1732 1733 if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH)) 1734 return 0; 1735 1736 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path); 1737 } 1738 1739 static ssize_t target_core_store_dev_udev_path( 1740 void *p, 1741 const char *page, 1742 size_t count) 1743 { 1744 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1745 struct se_hba *hba = se_dev->se_dev_hba; 1746 ssize_t read_bytes; 1747 1748 if (count > (SE_UDEV_PATH_LEN-1)) { 1749 printk(KERN_ERR "udev_path count: %d exceeds" 1750 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 1751 SE_UDEV_PATH_LEN-1); 1752 return -EINVAL; 1753 } 1754 1755 se_dev->su_dev_flags |= SDF_USING_UDEV_PATH; 1756 read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN, 1757 "%s", page); 1758 1759 printk(KERN_INFO "Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 1760 config_item_name(&hba->hba_group.cg_item), 1761 config_item_name(&se_dev->se_dev_group.cg_item), 1762 se_dev->se_dev_udev_path); 1763 1764 return read_bytes; 1765 } 1766 1767 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = { 1768 .attr = { .ca_owner = THIS_MODULE, 1769 .ca_name = "udev_path", 1770 .ca_mode = S_IRUGO | S_IWUSR }, 1771 .show = target_core_show_dev_udev_path, 1772 .store = target_core_store_dev_udev_path, 1773 }; 1774 1775 static ssize_t target_core_store_dev_enable( 1776 void *p, 1777 const char *page, 1778 size_t count) 1779 { 1780 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1781 struct se_device *dev; 1782 struct se_hba *hba = se_dev->se_dev_hba; 1783 struct se_subsystem_api *t = hba->transport; 1784 char *ptr; 1785 1786 ptr = strstr(page, "1"); 1787 if (!(ptr)) { 1788 printk(KERN_ERR "For dev_enable ops, only valid value" 1789 " is \"1\"\n"); 1790 return -EINVAL; 1791 } 1792 if ((se_dev->se_dev_ptr)) { 1793 printk(KERN_ERR "se_dev->se_dev_ptr already set for storage" 1794 " object\n"); 1795 return -EEXIST; 1796 } 1797 1798 if (t->check_configfs_dev_params(hba, se_dev) < 0) 1799 return -EINVAL; 1800 1801 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr); 1802 if (!(dev) || IS_ERR(dev)) 1803 return -EINVAL; 1804 1805 se_dev->se_dev_ptr = dev; 1806 printk(KERN_INFO "Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:" 1807 " %p\n", se_dev->se_dev_ptr); 1808 1809 return count; 1810 } 1811 1812 static struct target_core_configfs_attribute target_core_attr_dev_enable = { 1813 .attr = { .ca_owner = THIS_MODULE, 1814 .ca_name = "enable", 1815 .ca_mode = S_IWUSR }, 1816 .show = NULL, 1817 .store = target_core_store_dev_enable, 1818 }; 1819 1820 static ssize_t target_core_show_alua_lu_gp(void *p, char *page) 1821 { 1822 struct se_device *dev; 1823 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p; 1824 struct config_item *lu_ci; 1825 struct t10_alua_lu_gp *lu_gp; 1826 struct t10_alua_lu_gp_member *lu_gp_mem; 1827 ssize_t len = 0; 1828 1829 dev = su_dev->se_dev_ptr; 1830 if (!(dev)) 1831 return -ENODEV; 1832 1833 if (T10_ALUA(su_dev)->alua_type != SPC3_ALUA_EMULATED) 1834 return len; 1835 1836 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1837 if (!(lu_gp_mem)) { 1838 printk(KERN_ERR "NULL struct se_device->dev_alua_lu_gp_mem" 1839 " pointer\n"); 1840 return -EINVAL; 1841 } 1842 1843 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1844 lu_gp = lu_gp_mem->lu_gp; 1845 if ((lu_gp)) { 1846 lu_ci = &lu_gp->lu_gp_group.cg_item; 1847 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 1848 config_item_name(lu_ci), lu_gp->lu_gp_id); 1849 } 1850 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1851 1852 return len; 1853 } 1854 1855 static ssize_t target_core_store_alua_lu_gp( 1856 void *p, 1857 const char *page, 1858 size_t count) 1859 { 1860 struct se_device *dev; 1861 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p; 1862 struct se_hba *hba = su_dev->se_dev_hba; 1863 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 1864 struct t10_alua_lu_gp_member *lu_gp_mem; 1865 unsigned char buf[LU_GROUP_NAME_BUF]; 1866 int move = 0; 1867 1868 dev = su_dev->se_dev_ptr; 1869 if (!(dev)) 1870 return -ENODEV; 1871 1872 if (T10_ALUA(su_dev)->alua_type != SPC3_ALUA_EMULATED) { 1873 printk(KERN_WARNING "SPC3_ALUA_EMULATED not enabled for %s/%s\n", 1874 config_item_name(&hba->hba_group.cg_item), 1875 config_item_name(&su_dev->se_dev_group.cg_item)); 1876 return -EINVAL; 1877 } 1878 if (count > LU_GROUP_NAME_BUF) { 1879 printk(KERN_ERR "ALUA LU Group Alias too large!\n"); 1880 return -EINVAL; 1881 } 1882 memset(buf, 0, LU_GROUP_NAME_BUF); 1883 memcpy(buf, page, count); 1884 /* 1885 * Any ALUA logical unit alias besides "NULL" means we will be 1886 * making a new group association. 1887 */ 1888 if (strcmp(strstrip(buf), "NULL")) { 1889 /* 1890 * core_alua_get_lu_gp_by_name() will increment reference to 1891 * struct t10_alua_lu_gp. This reference is released with 1892 * core_alua_get_lu_gp_by_name below(). 1893 */ 1894 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 1895 if (!(lu_gp_new)) 1896 return -ENODEV; 1897 } 1898 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1899 if (!(lu_gp_mem)) { 1900 if (lu_gp_new) 1901 core_alua_put_lu_gp_from_name(lu_gp_new); 1902 printk(KERN_ERR "NULL struct se_device->dev_alua_lu_gp_mem" 1903 " pointer\n"); 1904 return -EINVAL; 1905 } 1906 1907 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1908 lu_gp = lu_gp_mem->lu_gp; 1909 if ((lu_gp)) { 1910 /* 1911 * Clearing an existing lu_gp association, and replacing 1912 * with NULL 1913 */ 1914 if (!(lu_gp_new)) { 1915 printk(KERN_INFO "Target_Core_ConfigFS: Releasing %s/%s" 1916 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 1917 " %hu\n", 1918 config_item_name(&hba->hba_group.cg_item), 1919 config_item_name(&su_dev->se_dev_group.cg_item), 1920 config_item_name(&lu_gp->lu_gp_group.cg_item), 1921 lu_gp->lu_gp_id); 1922 1923 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 1924 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1925 1926 return count; 1927 } 1928 /* 1929 * Removing existing association of lu_gp_mem with lu_gp 1930 */ 1931 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 1932 move = 1; 1933 } 1934 /* 1935 * Associate lu_gp_mem with lu_gp_new. 1936 */ 1937 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 1938 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1939 1940 printk(KERN_INFO "Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 1941 " core/alua/lu_gps/%s, ID: %hu\n", 1942 (move) ? "Moving" : "Adding", 1943 config_item_name(&hba->hba_group.cg_item), 1944 config_item_name(&su_dev->se_dev_group.cg_item), 1945 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 1946 lu_gp_new->lu_gp_id); 1947 1948 core_alua_put_lu_gp_from_name(lu_gp_new); 1949 return count; 1950 } 1951 1952 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = { 1953 .attr = { .ca_owner = THIS_MODULE, 1954 .ca_name = "alua_lu_gp", 1955 .ca_mode = S_IRUGO | S_IWUSR }, 1956 .show = target_core_show_alua_lu_gp, 1957 .store = target_core_store_alua_lu_gp, 1958 }; 1959 1960 static struct configfs_attribute *lio_core_dev_attrs[] = { 1961 &target_core_attr_dev_info.attr, 1962 &target_core_attr_dev_control.attr, 1963 &target_core_attr_dev_alias.attr, 1964 &target_core_attr_dev_udev_path.attr, 1965 &target_core_attr_dev_enable.attr, 1966 &target_core_attr_dev_alua_lu_gp.attr, 1967 NULL, 1968 }; 1969 1970 static void target_core_dev_release(struct config_item *item) 1971 { 1972 struct se_subsystem_dev *se_dev = container_of(to_config_group(item), 1973 struct se_subsystem_dev, se_dev_group); 1974 struct config_group *dev_cg; 1975 1976 if (!(se_dev)) 1977 return; 1978 1979 dev_cg = &se_dev->se_dev_group; 1980 kfree(dev_cg->default_groups); 1981 } 1982 1983 static ssize_t target_core_dev_show(struct config_item *item, 1984 struct configfs_attribute *attr, 1985 char *page) 1986 { 1987 struct se_subsystem_dev *se_dev = container_of( 1988 to_config_group(item), struct se_subsystem_dev, 1989 se_dev_group); 1990 struct target_core_configfs_attribute *tc_attr = container_of( 1991 attr, struct target_core_configfs_attribute, attr); 1992 1993 if (!(tc_attr->show)) 1994 return -EINVAL; 1995 1996 return tc_attr->show((void *)se_dev, page); 1997 } 1998 1999 static ssize_t target_core_dev_store(struct config_item *item, 2000 struct configfs_attribute *attr, 2001 const char *page, size_t count) 2002 { 2003 struct se_subsystem_dev *se_dev = container_of( 2004 to_config_group(item), struct se_subsystem_dev, 2005 se_dev_group); 2006 struct target_core_configfs_attribute *tc_attr = container_of( 2007 attr, struct target_core_configfs_attribute, attr); 2008 2009 if (!(tc_attr->store)) 2010 return -EINVAL; 2011 2012 return tc_attr->store((void *)se_dev, page, count); 2013 } 2014 2015 static struct configfs_item_operations target_core_dev_item_ops = { 2016 .release = target_core_dev_release, 2017 .show_attribute = target_core_dev_show, 2018 .store_attribute = target_core_dev_store, 2019 }; 2020 2021 static struct config_item_type target_core_dev_cit = { 2022 .ct_item_ops = &target_core_dev_item_ops, 2023 .ct_attrs = lio_core_dev_attrs, 2024 .ct_owner = THIS_MODULE, 2025 }; 2026 2027 /* End functions for struct config_item_type target_core_dev_cit */ 2028 2029 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 2030 2031 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp); 2032 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \ 2033 static struct target_core_alua_lu_gp_attribute \ 2034 target_core_alua_lu_gp_##_name = \ 2035 __CONFIGFS_EATTR(_name, _mode, \ 2036 target_core_alua_lu_gp_show_attr_##_name, \ 2037 target_core_alua_lu_gp_store_attr_##_name); 2038 2039 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \ 2040 static struct target_core_alua_lu_gp_attribute \ 2041 target_core_alua_lu_gp_##_name = \ 2042 __CONFIGFS_EATTR_RO(_name, \ 2043 target_core_alua_lu_gp_show_attr_##_name); 2044 2045 /* 2046 * lu_gp_id 2047 */ 2048 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id( 2049 struct t10_alua_lu_gp *lu_gp, 2050 char *page) 2051 { 2052 if (!(lu_gp->lu_gp_valid_id)) 2053 return 0; 2054 2055 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2056 } 2057 2058 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id( 2059 struct t10_alua_lu_gp *lu_gp, 2060 const char *page, 2061 size_t count) 2062 { 2063 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2064 unsigned long lu_gp_id; 2065 int ret; 2066 2067 ret = strict_strtoul(page, 0, &lu_gp_id); 2068 if (ret < 0) { 2069 printk(KERN_ERR "strict_strtoul() returned %d for" 2070 " lu_gp_id\n", ret); 2071 return -EINVAL; 2072 } 2073 if (lu_gp_id > 0x0000ffff) { 2074 printk(KERN_ERR "ALUA lu_gp_id: %lu exceeds maximum:" 2075 " 0x0000ffff\n", lu_gp_id); 2076 return -EINVAL; 2077 } 2078 2079 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2080 if (ret < 0) 2081 return -EINVAL; 2082 2083 printk(KERN_INFO "Target_Core_ConfigFS: Set ALUA Logical Unit" 2084 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2085 config_item_name(&alua_lu_gp_cg->cg_item), 2086 lu_gp->lu_gp_id); 2087 2088 return count; 2089 } 2090 2091 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR); 2092 2093 /* 2094 * members 2095 */ 2096 static ssize_t target_core_alua_lu_gp_show_attr_members( 2097 struct t10_alua_lu_gp *lu_gp, 2098 char *page) 2099 { 2100 struct se_device *dev; 2101 struct se_hba *hba; 2102 struct se_subsystem_dev *su_dev; 2103 struct t10_alua_lu_gp_member *lu_gp_mem; 2104 ssize_t len = 0, cur_len; 2105 unsigned char buf[LU_GROUP_NAME_BUF]; 2106 2107 memset(buf, 0, LU_GROUP_NAME_BUF); 2108 2109 spin_lock(&lu_gp->lu_gp_lock); 2110 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2111 dev = lu_gp_mem->lu_gp_mem_dev; 2112 su_dev = dev->se_sub_dev; 2113 hba = su_dev->se_dev_hba; 2114 2115 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 2116 config_item_name(&hba->hba_group.cg_item), 2117 config_item_name(&su_dev->se_dev_group.cg_item)); 2118 cur_len++; /* Extra byte for NULL terminator */ 2119 2120 if ((cur_len + len) > PAGE_SIZE) { 2121 printk(KERN_WARNING "Ran out of lu_gp_show_attr" 2122 "_members buffer\n"); 2123 break; 2124 } 2125 memcpy(page+len, buf, cur_len); 2126 len += cur_len; 2127 } 2128 spin_unlock(&lu_gp->lu_gp_lock); 2129 2130 return len; 2131 } 2132 2133 SE_DEV_ALUA_LU_ATTR_RO(members); 2134 2135 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group); 2136 2137 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2138 &target_core_alua_lu_gp_lu_gp_id.attr, 2139 &target_core_alua_lu_gp_members.attr, 2140 NULL, 2141 }; 2142 2143 static struct configfs_item_operations target_core_alua_lu_gp_ops = { 2144 .show_attribute = target_core_alua_lu_gp_attr_show, 2145 .store_attribute = target_core_alua_lu_gp_attr_store, 2146 }; 2147 2148 static struct config_item_type target_core_alua_lu_gp_cit = { 2149 .ct_item_ops = &target_core_alua_lu_gp_ops, 2150 .ct_attrs = target_core_alua_lu_gp_attrs, 2151 .ct_owner = THIS_MODULE, 2152 }; 2153 2154 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2155 2156 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2157 2158 static struct config_group *target_core_alua_create_lu_gp( 2159 struct config_group *group, 2160 const char *name) 2161 { 2162 struct t10_alua_lu_gp *lu_gp; 2163 struct config_group *alua_lu_gp_cg = NULL; 2164 struct config_item *alua_lu_gp_ci = NULL; 2165 2166 lu_gp = core_alua_allocate_lu_gp(name, 0); 2167 if (IS_ERR(lu_gp)) 2168 return NULL; 2169 2170 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2171 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2172 2173 config_group_init_type_name(alua_lu_gp_cg, name, 2174 &target_core_alua_lu_gp_cit); 2175 2176 printk(KERN_INFO "Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2177 " Group: core/alua/lu_gps/%s\n", 2178 config_item_name(alua_lu_gp_ci)); 2179 2180 return alua_lu_gp_cg; 2181 2182 } 2183 2184 static void target_core_alua_drop_lu_gp( 2185 struct config_group *group, 2186 struct config_item *item) 2187 { 2188 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2189 struct t10_alua_lu_gp, lu_gp_group); 2190 2191 printk(KERN_INFO "Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2192 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2193 config_item_name(item), lu_gp->lu_gp_id); 2194 2195 config_item_put(item); 2196 core_alua_free_lu_gp(lu_gp); 2197 } 2198 2199 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2200 .make_group = &target_core_alua_create_lu_gp, 2201 .drop_item = &target_core_alua_drop_lu_gp, 2202 }; 2203 2204 static struct config_item_type target_core_alua_lu_gps_cit = { 2205 .ct_item_ops = NULL, 2206 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2207 .ct_owner = THIS_MODULE, 2208 }; 2209 2210 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2211 2212 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2213 2214 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp); 2215 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \ 2216 static struct target_core_alua_tg_pt_gp_attribute \ 2217 target_core_alua_tg_pt_gp_##_name = \ 2218 __CONFIGFS_EATTR(_name, _mode, \ 2219 target_core_alua_tg_pt_gp_show_attr_##_name, \ 2220 target_core_alua_tg_pt_gp_store_attr_##_name); 2221 2222 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \ 2223 static struct target_core_alua_tg_pt_gp_attribute \ 2224 target_core_alua_tg_pt_gp_##_name = \ 2225 __CONFIGFS_EATTR_RO(_name, \ 2226 target_core_alua_tg_pt_gp_show_attr_##_name); 2227 2228 /* 2229 * alua_access_state 2230 */ 2231 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state( 2232 struct t10_alua_tg_pt_gp *tg_pt_gp, 2233 char *page) 2234 { 2235 return sprintf(page, "%d\n", 2236 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state)); 2237 } 2238 2239 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state( 2240 struct t10_alua_tg_pt_gp *tg_pt_gp, 2241 const char *page, 2242 size_t count) 2243 { 2244 struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev; 2245 unsigned long tmp; 2246 int new_state, ret; 2247 2248 if (!(tg_pt_gp->tg_pt_gp_valid_id)) { 2249 printk(KERN_ERR "Unable to do implict ALUA on non valid" 2250 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id); 2251 return -EINVAL; 2252 } 2253 2254 ret = strict_strtoul(page, 0, &tmp); 2255 if (ret < 0) { 2256 printk("Unable to extract new ALUA access state from" 2257 " %s\n", page); 2258 return -EINVAL; 2259 } 2260 new_state = (int)tmp; 2261 2262 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) { 2263 printk(KERN_ERR "Unable to process implict configfs ALUA" 2264 " transition while TPGS_IMPLICT_ALUA is diabled\n"); 2265 return -EINVAL; 2266 } 2267 2268 ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr, 2269 NULL, NULL, new_state, 0); 2270 return (!ret) ? count : -EINVAL; 2271 } 2272 2273 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR); 2274 2275 /* 2276 * alua_access_status 2277 */ 2278 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status( 2279 struct t10_alua_tg_pt_gp *tg_pt_gp, 2280 char *page) 2281 { 2282 return sprintf(page, "%s\n", 2283 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2284 } 2285 2286 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status( 2287 struct t10_alua_tg_pt_gp *tg_pt_gp, 2288 const char *page, 2289 size_t count) 2290 { 2291 unsigned long tmp; 2292 int new_status, ret; 2293 2294 if (!(tg_pt_gp->tg_pt_gp_valid_id)) { 2295 printk(KERN_ERR "Unable to do set ALUA access status on non" 2296 " valid tg_pt_gp ID: %hu\n", 2297 tg_pt_gp->tg_pt_gp_valid_id); 2298 return -EINVAL; 2299 } 2300 2301 ret = strict_strtoul(page, 0, &tmp); 2302 if (ret < 0) { 2303 printk(KERN_ERR "Unable to extract new ALUA access status" 2304 " from %s\n", page); 2305 return -EINVAL; 2306 } 2307 new_status = (int)tmp; 2308 2309 if ((new_status != ALUA_STATUS_NONE) && 2310 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) && 2311 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) { 2312 printk(KERN_ERR "Illegal ALUA access status: 0x%02x\n", 2313 new_status); 2314 return -EINVAL; 2315 } 2316 2317 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2318 return count; 2319 } 2320 2321 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR); 2322 2323 /* 2324 * alua_access_type 2325 */ 2326 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type( 2327 struct t10_alua_tg_pt_gp *tg_pt_gp, 2328 char *page) 2329 { 2330 return core_alua_show_access_type(tg_pt_gp, page); 2331 } 2332 2333 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type( 2334 struct t10_alua_tg_pt_gp *tg_pt_gp, 2335 const char *page, 2336 size_t count) 2337 { 2338 return core_alua_store_access_type(tg_pt_gp, page, count); 2339 } 2340 2341 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR); 2342 2343 /* 2344 * alua_write_metadata 2345 */ 2346 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata( 2347 struct t10_alua_tg_pt_gp *tg_pt_gp, 2348 char *page) 2349 { 2350 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata); 2351 } 2352 2353 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata( 2354 struct t10_alua_tg_pt_gp *tg_pt_gp, 2355 const char *page, 2356 size_t count) 2357 { 2358 unsigned long tmp; 2359 int ret; 2360 2361 ret = strict_strtoul(page, 0, &tmp); 2362 if (ret < 0) { 2363 printk(KERN_ERR "Unable to extract alua_write_metadata\n"); 2364 return -EINVAL; 2365 } 2366 2367 if ((tmp != 0) && (tmp != 1)) { 2368 printk(KERN_ERR "Illegal value for alua_write_metadata:" 2369 " %lu\n", tmp); 2370 return -EINVAL; 2371 } 2372 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 2373 2374 return count; 2375 } 2376 2377 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR); 2378 2379 2380 2381 /* 2382 * nonop_delay_msecs 2383 */ 2384 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs( 2385 struct t10_alua_tg_pt_gp *tg_pt_gp, 2386 char *page) 2387 { 2388 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page); 2389 2390 } 2391 2392 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs( 2393 struct t10_alua_tg_pt_gp *tg_pt_gp, 2394 const char *page, 2395 size_t count) 2396 { 2397 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count); 2398 } 2399 2400 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR); 2401 2402 /* 2403 * trans_delay_msecs 2404 */ 2405 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs( 2406 struct t10_alua_tg_pt_gp *tg_pt_gp, 2407 char *page) 2408 { 2409 return core_alua_show_trans_delay_msecs(tg_pt_gp, page); 2410 } 2411 2412 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs( 2413 struct t10_alua_tg_pt_gp *tg_pt_gp, 2414 const char *page, 2415 size_t count) 2416 { 2417 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count); 2418 } 2419 2420 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR); 2421 2422 /* 2423 * preferred 2424 */ 2425 2426 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred( 2427 struct t10_alua_tg_pt_gp *tg_pt_gp, 2428 char *page) 2429 { 2430 return core_alua_show_preferred_bit(tg_pt_gp, page); 2431 } 2432 2433 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred( 2434 struct t10_alua_tg_pt_gp *tg_pt_gp, 2435 const char *page, 2436 size_t count) 2437 { 2438 return core_alua_store_preferred_bit(tg_pt_gp, page, count); 2439 } 2440 2441 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR); 2442 2443 /* 2444 * tg_pt_gp_id 2445 */ 2446 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id( 2447 struct t10_alua_tg_pt_gp *tg_pt_gp, 2448 char *page) 2449 { 2450 if (!(tg_pt_gp->tg_pt_gp_valid_id)) 2451 return 0; 2452 2453 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 2454 } 2455 2456 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id( 2457 struct t10_alua_tg_pt_gp *tg_pt_gp, 2458 const char *page, 2459 size_t count) 2460 { 2461 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2462 unsigned long tg_pt_gp_id; 2463 int ret; 2464 2465 ret = strict_strtoul(page, 0, &tg_pt_gp_id); 2466 if (ret < 0) { 2467 printk(KERN_ERR "strict_strtoul() returned %d for" 2468 " tg_pt_gp_id\n", ret); 2469 return -EINVAL; 2470 } 2471 if (tg_pt_gp_id > 0x0000ffff) { 2472 printk(KERN_ERR "ALUA tg_pt_gp_id: %lu exceeds maximum:" 2473 " 0x0000ffff\n", tg_pt_gp_id); 2474 return -EINVAL; 2475 } 2476 2477 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 2478 if (ret < 0) 2479 return -EINVAL; 2480 2481 printk(KERN_INFO "Target_Core_ConfigFS: Set ALUA Target Port Group: " 2482 "core/alua/tg_pt_gps/%s to ID: %hu\n", 2483 config_item_name(&alua_tg_pt_gp_cg->cg_item), 2484 tg_pt_gp->tg_pt_gp_id); 2485 2486 return count; 2487 } 2488 2489 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR); 2490 2491 /* 2492 * members 2493 */ 2494 static ssize_t target_core_alua_tg_pt_gp_show_attr_members( 2495 struct t10_alua_tg_pt_gp *tg_pt_gp, 2496 char *page) 2497 { 2498 struct se_port *port; 2499 struct se_portal_group *tpg; 2500 struct se_lun *lun; 2501 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; 2502 ssize_t len = 0, cur_len; 2503 unsigned char buf[TG_PT_GROUP_NAME_BUF]; 2504 2505 memset(buf, 0, TG_PT_GROUP_NAME_BUF); 2506 2507 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 2508 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list, 2509 tg_pt_gp_mem_list) { 2510 port = tg_pt_gp_mem->tg_pt; 2511 tpg = port->sep_tpg; 2512 lun = port->sep_lun; 2513 2514 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 2515 "/%s\n", TPG_TFO(tpg)->get_fabric_name(), 2516 TPG_TFO(tpg)->tpg_get_wwn(tpg), 2517 TPG_TFO(tpg)->tpg_get_tag(tpg), 2518 config_item_name(&lun->lun_group.cg_item)); 2519 cur_len++; /* Extra byte for NULL terminator */ 2520 2521 if ((cur_len + len) > PAGE_SIZE) { 2522 printk(KERN_WARNING "Ran out of lu_gp_show_attr" 2523 "_members buffer\n"); 2524 break; 2525 } 2526 memcpy(page+len, buf, cur_len); 2527 len += cur_len; 2528 } 2529 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 2530 2531 return len; 2532 } 2533 2534 SE_DEV_ALUA_TG_PT_ATTR_RO(members); 2535 2536 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp, 2537 tg_pt_gp_group); 2538 2539 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 2540 &target_core_alua_tg_pt_gp_alua_access_state.attr, 2541 &target_core_alua_tg_pt_gp_alua_access_status.attr, 2542 &target_core_alua_tg_pt_gp_alua_access_type.attr, 2543 &target_core_alua_tg_pt_gp_alua_write_metadata.attr, 2544 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr, 2545 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr, 2546 &target_core_alua_tg_pt_gp_preferred.attr, 2547 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr, 2548 &target_core_alua_tg_pt_gp_members.attr, 2549 NULL, 2550 }; 2551 2552 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 2553 .show_attribute = target_core_alua_tg_pt_gp_attr_show, 2554 .store_attribute = target_core_alua_tg_pt_gp_attr_store, 2555 }; 2556 2557 static struct config_item_type target_core_alua_tg_pt_gp_cit = { 2558 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 2559 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 2560 .ct_owner = THIS_MODULE, 2561 }; 2562 2563 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2564 2565 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */ 2566 2567 static struct config_group *target_core_alua_create_tg_pt_gp( 2568 struct config_group *group, 2569 const char *name) 2570 { 2571 struct t10_alua *alua = container_of(group, struct t10_alua, 2572 alua_tg_pt_gps_group); 2573 struct t10_alua_tg_pt_gp *tg_pt_gp; 2574 struct se_subsystem_dev *su_dev = alua->t10_sub_dev; 2575 struct config_group *alua_tg_pt_gp_cg = NULL; 2576 struct config_item *alua_tg_pt_gp_ci = NULL; 2577 2578 tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0); 2579 if (!(tg_pt_gp)) 2580 return NULL; 2581 2582 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2583 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 2584 2585 config_group_init_type_name(alua_tg_pt_gp_cg, name, 2586 &target_core_alua_tg_pt_gp_cit); 2587 2588 printk(KERN_INFO "Target_Core_ConfigFS: Allocated ALUA Target Port" 2589 " Group: alua/tg_pt_gps/%s\n", 2590 config_item_name(alua_tg_pt_gp_ci)); 2591 2592 return alua_tg_pt_gp_cg; 2593 } 2594 2595 static void target_core_alua_drop_tg_pt_gp( 2596 struct config_group *group, 2597 struct config_item *item) 2598 { 2599 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2600 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2601 2602 printk(KERN_INFO "Target_Core_ConfigFS: Releasing ALUA Target Port" 2603 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 2604 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 2605 2606 config_item_put(item); 2607 core_alua_free_tg_pt_gp(tg_pt_gp); 2608 } 2609 2610 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 2611 .make_group = &target_core_alua_create_tg_pt_gp, 2612 .drop_item = &target_core_alua_drop_tg_pt_gp, 2613 }; 2614 2615 static struct config_item_type target_core_alua_tg_pt_gps_cit = { 2616 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops, 2617 .ct_owner = THIS_MODULE, 2618 }; 2619 2620 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */ 2621 2622 /* Start functions for struct config_item_type target_core_alua_cit */ 2623 2624 /* 2625 * target_core_alua_cit is a ConfigFS group that lives under 2626 * /sys/kernel/config/target/core/alua. There are default groups 2627 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 2628 * target_core_alua_cit in target_core_init_configfs() below. 2629 */ 2630 static struct config_item_type target_core_alua_cit = { 2631 .ct_item_ops = NULL, 2632 .ct_attrs = NULL, 2633 .ct_owner = THIS_MODULE, 2634 }; 2635 2636 /* End functions for struct config_item_type target_core_alua_cit */ 2637 2638 /* Start functions for struct config_item_type target_core_hba_cit */ 2639 2640 static struct config_group *target_core_make_subdev( 2641 struct config_group *group, 2642 const char *name) 2643 { 2644 struct t10_alua_tg_pt_gp *tg_pt_gp; 2645 struct se_subsystem_dev *se_dev; 2646 struct se_subsystem_api *t; 2647 struct config_item *hba_ci = &group->cg_item; 2648 struct se_hba *hba = item_to_hba(hba_ci); 2649 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL; 2650 2651 if (mutex_lock_interruptible(&hba->hba_access_mutex)) 2652 return NULL; 2653 2654 /* 2655 * Locate the struct se_subsystem_api from parent's struct se_hba. 2656 */ 2657 t = hba->transport; 2658 2659 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL); 2660 if (!se_dev) { 2661 printk(KERN_ERR "Unable to allocate memory for" 2662 " struct se_subsystem_dev\n"); 2663 goto unlock; 2664 } 2665 INIT_LIST_HEAD(&se_dev->g_se_dev_list); 2666 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list); 2667 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock); 2668 INIT_LIST_HEAD(&se_dev->t10_reservation.registration_list); 2669 INIT_LIST_HEAD(&se_dev->t10_reservation.aptpl_reg_list); 2670 spin_lock_init(&se_dev->t10_reservation.registration_lock); 2671 spin_lock_init(&se_dev->t10_reservation.aptpl_reg_lock); 2672 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list); 2673 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock); 2674 spin_lock_init(&se_dev->se_dev_lock); 2675 se_dev->t10_reservation.pr_aptpl_buf_len = PR_APTPL_BUF_LEN; 2676 se_dev->t10_wwn.t10_sub_dev = se_dev; 2677 se_dev->t10_alua.t10_sub_dev = se_dev; 2678 se_dev->se_dev_attrib.da_sub_dev = se_dev; 2679 2680 se_dev->se_dev_hba = hba; 2681 dev_cg = &se_dev->se_dev_group; 2682 2683 dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 6, 2684 GFP_KERNEL); 2685 if (!(dev_cg->default_groups)) 2686 goto out; 2687 /* 2688 * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr 2689 * for ->allocate_virtdevice() 2690 * 2691 * se_dev->se_dev_ptr will be set after ->create_virtdev() 2692 * has been called successfully in the next level up in the 2693 * configfs tree for device object's struct config_group. 2694 */ 2695 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name); 2696 if (!(se_dev->se_dev_su_ptr)) { 2697 printk(KERN_ERR "Unable to locate subsystem dependent pointer" 2698 " from allocate_virtdevice()\n"); 2699 goto out; 2700 } 2701 spin_lock(&se_global->g_device_lock); 2702 list_add_tail(&se_dev->g_se_dev_list, &se_global->g_se_dev_list); 2703 spin_unlock(&se_global->g_device_lock); 2704 2705 config_group_init_type_name(&se_dev->se_dev_group, name, 2706 &target_core_dev_cit); 2707 config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib", 2708 &target_core_dev_attrib_cit); 2709 config_group_init_type_name(&se_dev->se_dev_pr_group, "pr", 2710 &target_core_dev_pr_cit); 2711 config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn", 2712 &target_core_dev_wwn_cit); 2713 config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group, 2714 "alua", &target_core_alua_tg_pt_gps_cit); 2715 dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group; 2716 dev_cg->default_groups[1] = &se_dev->se_dev_pr_group; 2717 dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group; 2718 dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group; 2719 dev_cg->default_groups[4] = NULL; 2720 /* 2721 * Add core/$HBA/$DEV/alua/tg_pt_gps/default_tg_pt_gp 2722 */ 2723 tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1); 2724 if (!(tg_pt_gp)) 2725 goto out; 2726 2727 tg_pt_gp_cg = &T10_ALUA(se_dev)->alua_tg_pt_gps_group; 2728 tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, 2729 GFP_KERNEL); 2730 if (!(tg_pt_gp_cg->default_groups)) { 2731 printk(KERN_ERR "Unable to allocate tg_pt_gp_cg->" 2732 "default_groups\n"); 2733 goto out; 2734 } 2735 2736 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 2737 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 2738 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group; 2739 tg_pt_gp_cg->default_groups[1] = NULL; 2740 T10_ALUA(se_dev)->default_tg_pt_gp = tg_pt_gp; 2741 2742 printk(KERN_INFO "Target_Core_ConfigFS: Allocated struct se_subsystem_dev:" 2743 " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr); 2744 2745 mutex_unlock(&hba->hba_access_mutex); 2746 return &se_dev->se_dev_group; 2747 out: 2748 if (T10_ALUA(se_dev)->default_tg_pt_gp) { 2749 core_alua_free_tg_pt_gp(T10_ALUA(se_dev)->default_tg_pt_gp); 2750 T10_ALUA(se_dev)->default_tg_pt_gp = NULL; 2751 } 2752 if (tg_pt_gp_cg) 2753 kfree(tg_pt_gp_cg->default_groups); 2754 if (dev_cg) 2755 kfree(dev_cg->default_groups); 2756 if (se_dev->se_dev_su_ptr) 2757 t->free_device(se_dev->se_dev_su_ptr); 2758 kfree(se_dev); 2759 unlock: 2760 mutex_unlock(&hba->hba_access_mutex); 2761 return NULL; 2762 } 2763 2764 static void target_core_drop_subdev( 2765 struct config_group *group, 2766 struct config_item *item) 2767 { 2768 struct se_subsystem_dev *se_dev = container_of(to_config_group(item), 2769 struct se_subsystem_dev, se_dev_group); 2770 struct se_hba *hba; 2771 struct se_subsystem_api *t; 2772 struct config_item *df_item; 2773 struct config_group *dev_cg, *tg_pt_gp_cg; 2774 int i, ret; 2775 2776 hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item); 2777 2778 if (mutex_lock_interruptible(&hba->hba_access_mutex)) 2779 goto out; 2780 2781 t = hba->transport; 2782 2783 spin_lock(&se_global->g_device_lock); 2784 list_del(&se_dev->g_se_dev_list); 2785 spin_unlock(&se_global->g_device_lock); 2786 2787 tg_pt_gp_cg = &T10_ALUA(se_dev)->alua_tg_pt_gps_group; 2788 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) { 2789 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item; 2790 tg_pt_gp_cg->default_groups[i] = NULL; 2791 config_item_put(df_item); 2792 } 2793 kfree(tg_pt_gp_cg->default_groups); 2794 core_alua_free_tg_pt_gp(T10_ALUA(se_dev)->default_tg_pt_gp); 2795 T10_ALUA(se_dev)->default_tg_pt_gp = NULL; 2796 2797 dev_cg = &se_dev->se_dev_group; 2798 for (i = 0; dev_cg->default_groups[i]; i++) { 2799 df_item = &dev_cg->default_groups[i]->cg_item; 2800 dev_cg->default_groups[i] = NULL; 2801 config_item_put(df_item); 2802 } 2803 2804 config_item_put(item); 2805 /* 2806 * This pointer will set when the storage is enabled with: 2807 * `echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable` 2808 */ 2809 if (se_dev->se_dev_ptr) { 2810 printk(KERN_INFO "Target_Core_ConfigFS: Calling se_free_" 2811 "virtual_device() for se_dev_ptr: %p\n", 2812 se_dev->se_dev_ptr); 2813 2814 ret = se_free_virtual_device(se_dev->se_dev_ptr, hba); 2815 if (ret < 0) 2816 goto hba_out; 2817 } else { 2818 /* 2819 * Release struct se_subsystem_dev->se_dev_su_ptr.. 2820 */ 2821 printk(KERN_INFO "Target_Core_ConfigFS: Calling t->free_" 2822 "device() for se_dev_su_ptr: %p\n", 2823 se_dev->se_dev_su_ptr); 2824 2825 t->free_device(se_dev->se_dev_su_ptr); 2826 } 2827 2828 printk(KERN_INFO "Target_Core_ConfigFS: Deallocating se_subsystem" 2829 "_dev_t: %p\n", se_dev); 2830 2831 hba_out: 2832 mutex_unlock(&hba->hba_access_mutex); 2833 out: 2834 kfree(se_dev); 2835 } 2836 2837 static struct configfs_group_operations target_core_hba_group_ops = { 2838 .make_group = target_core_make_subdev, 2839 .drop_item = target_core_drop_subdev, 2840 }; 2841 2842 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba); 2843 #define SE_HBA_ATTR(_name, _mode) \ 2844 static struct target_core_hba_attribute \ 2845 target_core_hba_##_name = \ 2846 __CONFIGFS_EATTR(_name, _mode, \ 2847 target_core_hba_show_attr_##_name, \ 2848 target_core_hba_store_attr_##_name); 2849 2850 #define SE_HBA_ATTR_RO(_name) \ 2851 static struct target_core_hba_attribute \ 2852 target_core_hba_##_name = \ 2853 __CONFIGFS_EATTR_RO(_name, \ 2854 target_core_hba_show_attr_##_name); 2855 2856 static ssize_t target_core_hba_show_attr_hba_info( 2857 struct se_hba *hba, 2858 char *page) 2859 { 2860 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 2861 hba->hba_id, hba->transport->name, 2862 TARGET_CORE_CONFIGFS_VERSION); 2863 } 2864 2865 SE_HBA_ATTR_RO(hba_info); 2866 2867 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba, 2868 char *page) 2869 { 2870 int hba_mode = 0; 2871 2872 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 2873 hba_mode = 1; 2874 2875 return sprintf(page, "%d\n", hba_mode); 2876 } 2877 2878 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba, 2879 const char *page, size_t count) 2880 { 2881 struct se_subsystem_api *transport = hba->transport; 2882 unsigned long mode_flag; 2883 int ret; 2884 2885 if (transport->pmode_enable_hba == NULL) 2886 return -EINVAL; 2887 2888 ret = strict_strtoul(page, 0, &mode_flag); 2889 if (ret < 0) { 2890 printk(KERN_ERR "Unable to extract hba mode flag: %d\n", ret); 2891 return -EINVAL; 2892 } 2893 2894 spin_lock(&hba->device_lock); 2895 if (!(list_empty(&hba->hba_dev_list))) { 2896 printk(KERN_ERR "Unable to set hba_mode with active devices\n"); 2897 spin_unlock(&hba->device_lock); 2898 return -EINVAL; 2899 } 2900 spin_unlock(&hba->device_lock); 2901 2902 ret = transport->pmode_enable_hba(hba, mode_flag); 2903 if (ret < 0) 2904 return -EINVAL; 2905 if (ret > 0) 2906 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 2907 else if (ret == 0) 2908 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 2909 2910 return count; 2911 } 2912 2913 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR); 2914 2915 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group); 2916 2917 static struct configfs_attribute *target_core_hba_attrs[] = { 2918 &target_core_hba_hba_info.attr, 2919 &target_core_hba_hba_mode.attr, 2920 NULL, 2921 }; 2922 2923 static struct configfs_item_operations target_core_hba_item_ops = { 2924 .show_attribute = target_core_hba_attr_show, 2925 .store_attribute = target_core_hba_attr_store, 2926 }; 2927 2928 static struct config_item_type target_core_hba_cit = { 2929 .ct_item_ops = &target_core_hba_item_ops, 2930 .ct_group_ops = &target_core_hba_group_ops, 2931 .ct_attrs = target_core_hba_attrs, 2932 .ct_owner = THIS_MODULE, 2933 }; 2934 2935 static struct config_group *target_core_call_addhbatotarget( 2936 struct config_group *group, 2937 const char *name) 2938 { 2939 char *se_plugin_str, *str, *str2; 2940 struct se_hba *hba; 2941 char buf[TARGET_CORE_NAME_MAX_LEN]; 2942 unsigned long plugin_dep_id = 0; 2943 int ret; 2944 2945 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN); 2946 if (strlen(name) > TARGET_CORE_NAME_MAX_LEN) { 2947 printk(KERN_ERR "Passed *name strlen(): %d exceeds" 2948 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 2949 TARGET_CORE_NAME_MAX_LEN); 2950 return ERR_PTR(-ENAMETOOLONG); 2951 } 2952 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 2953 2954 str = strstr(buf, "_"); 2955 if (!(str)) { 2956 printk(KERN_ERR "Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 2957 return ERR_PTR(-EINVAL); 2958 } 2959 se_plugin_str = buf; 2960 /* 2961 * Special case for subsystem plugins that have "_" in their names. 2962 * Namely rd_direct and rd_mcp.. 2963 */ 2964 str2 = strstr(str+1, "_"); 2965 if ((str2)) { 2966 *str2 = '\0'; /* Terminate for *se_plugin_str */ 2967 str2++; /* Skip to start of plugin dependent ID */ 2968 str = str2; 2969 } else { 2970 *str = '\0'; /* Terminate for *se_plugin_str */ 2971 str++; /* Skip to start of plugin dependent ID */ 2972 } 2973 2974 ret = strict_strtoul(str, 0, &plugin_dep_id); 2975 if (ret < 0) { 2976 printk(KERN_ERR "strict_strtoul() returned %d for" 2977 " plugin_dep_id\n", ret); 2978 return ERR_PTR(-EINVAL); 2979 } 2980 /* 2981 * Load up TCM subsystem plugins if they have not already been loaded. 2982 */ 2983 if (transport_subsystem_check_init() < 0) 2984 return ERR_PTR(-EINVAL); 2985 2986 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 2987 if (IS_ERR(hba)) 2988 return ERR_CAST(hba); 2989 2990 config_group_init_type_name(&hba->hba_group, name, 2991 &target_core_hba_cit); 2992 2993 return &hba->hba_group; 2994 } 2995 2996 static void target_core_call_delhbafromtarget( 2997 struct config_group *group, 2998 struct config_item *item) 2999 { 3000 struct se_hba *hba = item_to_hba(item); 3001 3002 config_item_put(item); 3003 core_delete_hba(hba); 3004 } 3005 3006 static struct configfs_group_operations target_core_group_ops = { 3007 .make_group = target_core_call_addhbatotarget, 3008 .drop_item = target_core_call_delhbafromtarget, 3009 }; 3010 3011 static struct config_item_type target_core_cit = { 3012 .ct_item_ops = NULL, 3013 .ct_group_ops = &target_core_group_ops, 3014 .ct_attrs = NULL, 3015 .ct_owner = THIS_MODULE, 3016 }; 3017 3018 /* Stop functions for struct config_item_type target_core_hba_cit */ 3019 3020 static int target_core_init_configfs(void) 3021 { 3022 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL; 3023 struct config_group *lu_gp_cg = NULL; 3024 struct configfs_subsystem *subsys; 3025 struct proc_dir_entry *scsi_target_proc = NULL; 3026 struct t10_alua_lu_gp *lu_gp; 3027 int ret; 3028 3029 printk(KERN_INFO "TARGET_CORE[0]: Loading Generic Kernel Storage" 3030 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3031 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3032 3033 subsys = target_core_subsystem[0]; 3034 config_group_init(&subsys->su_group); 3035 mutex_init(&subsys->su_mutex); 3036 3037 INIT_LIST_HEAD(&g_tf_list); 3038 mutex_init(&g_tf_lock); 3039 init_scsi_index_table(); 3040 ret = init_se_global(); 3041 if (ret < 0) 3042 return -1; 3043 /* 3044 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3045 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3046 */ 3047 target_cg = &subsys->su_group; 3048 target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, 3049 GFP_KERNEL); 3050 if (!(target_cg->default_groups)) { 3051 printk(KERN_ERR "Unable to allocate target_cg->default_groups\n"); 3052 goto out_global; 3053 } 3054 3055 config_group_init_type_name(&se_global->target_core_hbagroup, 3056 "core", &target_core_cit); 3057 target_cg->default_groups[0] = &se_global->target_core_hbagroup; 3058 target_cg->default_groups[1] = NULL; 3059 /* 3060 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3061 */ 3062 hba_cg = &se_global->target_core_hbagroup; 3063 hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, 3064 GFP_KERNEL); 3065 if (!(hba_cg->default_groups)) { 3066 printk(KERN_ERR "Unable to allocate hba_cg->default_groups\n"); 3067 goto out_global; 3068 } 3069 config_group_init_type_name(&se_global->alua_group, 3070 "alua", &target_core_alua_cit); 3071 hba_cg->default_groups[0] = &se_global->alua_group; 3072 hba_cg->default_groups[1] = NULL; 3073 /* 3074 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3075 * groups under /sys/kernel/config/target/core/alua/ 3076 */ 3077 alua_cg = &se_global->alua_group; 3078 alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, 3079 GFP_KERNEL); 3080 if (!(alua_cg->default_groups)) { 3081 printk(KERN_ERR "Unable to allocate alua_cg->default_groups\n"); 3082 goto out_global; 3083 } 3084 3085 config_group_init_type_name(&se_global->alua_lu_gps_group, 3086 "lu_gps", &target_core_alua_lu_gps_cit); 3087 alua_cg->default_groups[0] = &se_global->alua_lu_gps_group; 3088 alua_cg->default_groups[1] = NULL; 3089 /* 3090 * Add core/alua/lu_gps/default_lu_gp 3091 */ 3092 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3093 if (IS_ERR(lu_gp)) 3094 goto out_global; 3095 3096 lu_gp_cg = &se_global->alua_lu_gps_group; 3097 lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, 3098 GFP_KERNEL); 3099 if (!(lu_gp_cg->default_groups)) { 3100 printk(KERN_ERR "Unable to allocate lu_gp_cg->default_groups\n"); 3101 goto out_global; 3102 } 3103 3104 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3105 &target_core_alua_lu_gp_cit); 3106 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group; 3107 lu_gp_cg->default_groups[1] = NULL; 3108 se_global->default_lu_gp = lu_gp; 3109 /* 3110 * Register the target_core_mod subsystem with configfs. 3111 */ 3112 ret = configfs_register_subsystem(subsys); 3113 if (ret < 0) { 3114 printk(KERN_ERR "Error %d while registering subsystem %s\n", 3115 ret, subsys->su_group.cg_item.ci_namebuf); 3116 goto out_global; 3117 } 3118 printk(KERN_INFO "TARGET_CORE[0]: Initialized ConfigFS Fabric" 3119 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s" 3120 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3121 /* 3122 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3123 */ 3124 ret = rd_module_init(); 3125 if (ret < 0) 3126 goto out; 3127 3128 if (core_dev_setup_virtual_lun0() < 0) 3129 goto out; 3130 3131 scsi_target_proc = proc_mkdir("scsi_target", 0); 3132 if (!(scsi_target_proc)) { 3133 printk(KERN_ERR "proc_mkdir(scsi_target, 0) failed\n"); 3134 goto out; 3135 } 3136 ret = init_scsi_target_mib(); 3137 if (ret < 0) 3138 goto out; 3139 3140 return 0; 3141 3142 out: 3143 configfs_unregister_subsystem(subsys); 3144 if (scsi_target_proc) 3145 remove_proc_entry("scsi_target", 0); 3146 core_dev_release_virtual_lun0(); 3147 rd_module_exit(); 3148 out_global: 3149 if (se_global->default_lu_gp) { 3150 core_alua_free_lu_gp(se_global->default_lu_gp); 3151 se_global->default_lu_gp = NULL; 3152 } 3153 if (lu_gp_cg) 3154 kfree(lu_gp_cg->default_groups); 3155 if (alua_cg) 3156 kfree(alua_cg->default_groups); 3157 if (hba_cg) 3158 kfree(hba_cg->default_groups); 3159 kfree(target_cg->default_groups); 3160 release_se_global(); 3161 return -1; 3162 } 3163 3164 static void target_core_exit_configfs(void) 3165 { 3166 struct configfs_subsystem *subsys; 3167 struct config_group *hba_cg, *alua_cg, *lu_gp_cg; 3168 struct config_item *item; 3169 int i; 3170 3171 se_global->in_shutdown = 1; 3172 subsys = target_core_subsystem[0]; 3173 3174 lu_gp_cg = &se_global->alua_lu_gps_group; 3175 for (i = 0; lu_gp_cg->default_groups[i]; i++) { 3176 item = &lu_gp_cg->default_groups[i]->cg_item; 3177 lu_gp_cg->default_groups[i] = NULL; 3178 config_item_put(item); 3179 } 3180 kfree(lu_gp_cg->default_groups); 3181 core_alua_free_lu_gp(se_global->default_lu_gp); 3182 se_global->default_lu_gp = NULL; 3183 3184 alua_cg = &se_global->alua_group; 3185 for (i = 0; alua_cg->default_groups[i]; i++) { 3186 item = &alua_cg->default_groups[i]->cg_item; 3187 alua_cg->default_groups[i] = NULL; 3188 config_item_put(item); 3189 } 3190 kfree(alua_cg->default_groups); 3191 3192 hba_cg = &se_global->target_core_hbagroup; 3193 for (i = 0; hba_cg->default_groups[i]; i++) { 3194 item = &hba_cg->default_groups[i]->cg_item; 3195 hba_cg->default_groups[i] = NULL; 3196 config_item_put(item); 3197 } 3198 kfree(hba_cg->default_groups); 3199 3200 for (i = 0; subsys->su_group.default_groups[i]; i++) { 3201 item = &subsys->su_group.default_groups[i]->cg_item; 3202 subsys->su_group.default_groups[i] = NULL; 3203 config_item_put(item); 3204 } 3205 kfree(subsys->su_group.default_groups); 3206 3207 configfs_unregister_subsystem(subsys); 3208 printk(KERN_INFO "TARGET_CORE[0]: Released ConfigFS Fabric" 3209 " Infrastructure\n"); 3210 3211 remove_scsi_target_mib(); 3212 remove_proc_entry("scsi_target", 0); 3213 core_dev_release_virtual_lun0(); 3214 rd_module_exit(); 3215 release_se_global(); 3216 3217 return; 3218 } 3219 3220 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3221 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3222 MODULE_LICENSE("GPL"); 3223 3224 module_init(target_core_init_configfs); 3225 module_exit(target_core_exit_configfs); 3226