1 /******************************************************************************* 2 * Filename: target_core_configfs.c 3 * 4 * This file contains ConfigFS logic for the Generic Target Engine project. 5 * 6 * Copyright (c) 2008-2011 Rising Tide Systems 7 * Copyright (c) 2008-2011 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 41 #include <target/target_core_base.h> 42 #include <target/target_core_device.h> 43 #include <target/target_core_transport.h> 44 #include <target/target_core_fabric_ops.h> 45 #include <target/target_core_fabric_configfs.h> 46 #include <target/target_core_configfs.h> 47 #include <target/configfs_macros.h> 48 49 #include "target_core_alua.h" 50 #include "target_core_hba.h" 51 #include "target_core_pr.h" 52 #include "target_core_rd.h" 53 #include "target_core_stat.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 NULL; 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 /* 501 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn() 502 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in 503 * target_core_fabric_configfs.c WWN+TPG group context code. 504 */ 505 if (!(tfo->fabric_make_wwn)) { 506 printk(KERN_ERR "Missing tfo->fabric_make_wwn()\n"); 507 return -EINVAL; 508 } 509 if (!(tfo->fabric_drop_wwn)) { 510 printk(KERN_ERR "Missing tfo->fabric_drop_wwn()\n"); 511 return -EINVAL; 512 } 513 if (!(tfo->fabric_make_tpg)) { 514 printk(KERN_ERR "Missing tfo->fabric_make_tpg()\n"); 515 return -EINVAL; 516 } 517 if (!(tfo->fabric_drop_tpg)) { 518 printk(KERN_ERR "Missing tfo->fabric_drop_tpg()\n"); 519 return -EINVAL; 520 } 521 522 return 0; 523 } 524 525 /* 526 * Called 2nd from fabric module with returned parameter of 527 * struct target_fabric_configfs * from target_fabric_configfs_init(). 528 * 529 * Upon a successful registration, the new fabric's struct config_item is 530 * return. Also, a pointer to this struct is set in the passed 531 * struct target_fabric_configfs. 532 */ 533 int target_fabric_configfs_register( 534 struct target_fabric_configfs *tf) 535 { 536 struct config_group *su_group; 537 int ret; 538 539 if (!(tf)) { 540 printk(KERN_ERR "Unable to locate target_fabric_configfs" 541 " pointer\n"); 542 return -EINVAL; 543 } 544 if (!(tf->tf_subsys)) { 545 printk(KERN_ERR "Unable to target struct config_subsystem" 546 " pointer\n"); 547 return -EINVAL; 548 } 549 su_group = &tf->tf_subsys->su_group; 550 if (!(su_group)) { 551 printk(KERN_ERR "Unable to locate target struct config_group" 552 " pointer\n"); 553 return -EINVAL; 554 } 555 ret = target_fabric_tf_ops_check(tf); 556 if (ret < 0) 557 return ret; 558 559 printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>" 560 ">>>>>>>>>>\n"); 561 return 0; 562 } 563 EXPORT_SYMBOL(target_fabric_configfs_register); 564 565 void target_fabric_configfs_deregister( 566 struct target_fabric_configfs *tf) 567 { 568 struct config_group *su_group; 569 struct configfs_subsystem *su; 570 571 if (!(tf)) { 572 printk(KERN_ERR "Unable to locate passed target_fabric_" 573 "configfs\n"); 574 return; 575 } 576 su = tf->tf_subsys; 577 if (!(su)) { 578 printk(KERN_ERR "Unable to locate passed tf->tf_subsys" 579 " pointer\n"); 580 return; 581 } 582 su_group = &tf->tf_subsys->su_group; 583 if (!(su_group)) { 584 printk(KERN_ERR "Unable to locate target struct config_group" 585 " pointer\n"); 586 return; 587 } 588 589 printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>" 590 ">>>>>>>>>>>>\n"); 591 mutex_lock(&g_tf_lock); 592 if (atomic_read(&tf->tf_access_cnt)) { 593 mutex_unlock(&g_tf_lock); 594 printk(KERN_ERR "Non zero tf->tf_access_cnt for fabric %s\n", 595 tf->tf_name); 596 BUG(); 597 } 598 list_del(&tf->tf_list); 599 mutex_unlock(&g_tf_lock); 600 601 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing tf:" 602 " %s\n", tf->tf_name); 603 tf->tf_module = NULL; 604 tf->tf_subsys = NULL; 605 kfree(tf); 606 607 printk("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>" 608 ">>>>>\n"); 609 return; 610 } 611 EXPORT_SYMBOL(target_fabric_configfs_deregister); 612 613 /*############################################################################## 614 // Stop functions called by external Target Fabrics Modules 615 //############################################################################*/ 616 617 /* Start functions for struct config_item_type target_core_dev_attrib_cit */ 618 619 #define DEF_DEV_ATTRIB_SHOW(_name) \ 620 static ssize_t target_core_dev_show_attr_##_name( \ 621 struct se_dev_attrib *da, \ 622 char *page) \ 623 { \ 624 struct se_device *dev; \ 625 struct se_subsystem_dev *se_dev = da->da_sub_dev; \ 626 ssize_t rb; \ 627 \ 628 spin_lock(&se_dev->se_dev_lock); \ 629 dev = se_dev->se_dev_ptr; \ 630 if (!(dev)) { \ 631 spin_unlock(&se_dev->se_dev_lock); \ 632 return -ENODEV; \ 633 } \ 634 rb = snprintf(page, PAGE_SIZE, "%u\n", (u32)DEV_ATTRIB(dev)->_name); \ 635 spin_unlock(&se_dev->se_dev_lock); \ 636 \ 637 return rb; \ 638 } 639 640 #define DEF_DEV_ATTRIB_STORE(_name) \ 641 static ssize_t target_core_dev_store_attr_##_name( \ 642 struct se_dev_attrib *da, \ 643 const char *page, \ 644 size_t count) \ 645 { \ 646 struct se_device *dev; \ 647 struct se_subsystem_dev *se_dev = da->da_sub_dev; \ 648 unsigned long val; \ 649 int ret; \ 650 \ 651 spin_lock(&se_dev->se_dev_lock); \ 652 dev = se_dev->se_dev_ptr; \ 653 if (!(dev)) { \ 654 spin_unlock(&se_dev->se_dev_lock); \ 655 return -ENODEV; \ 656 } \ 657 ret = strict_strtoul(page, 0, &val); \ 658 if (ret < 0) { \ 659 spin_unlock(&se_dev->se_dev_lock); \ 660 printk(KERN_ERR "strict_strtoul() failed with" \ 661 " ret: %d\n", ret); \ 662 return -EINVAL; \ 663 } \ 664 ret = se_dev_set_##_name(dev, (u32)val); \ 665 spin_unlock(&se_dev->se_dev_lock); \ 666 \ 667 return (!ret) ? count : -EINVAL; \ 668 } 669 670 #define DEF_DEV_ATTRIB(_name) \ 671 DEF_DEV_ATTRIB_SHOW(_name); \ 672 DEF_DEV_ATTRIB_STORE(_name); 673 674 #define DEF_DEV_ATTRIB_RO(_name) \ 675 DEF_DEV_ATTRIB_SHOW(_name); 676 677 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib); 678 #define SE_DEV_ATTR(_name, _mode) \ 679 static struct target_core_dev_attrib_attribute \ 680 target_core_dev_attrib_##_name = \ 681 __CONFIGFS_EATTR(_name, _mode, \ 682 target_core_dev_show_attr_##_name, \ 683 target_core_dev_store_attr_##_name); 684 685 #define SE_DEV_ATTR_RO(_name); \ 686 static struct target_core_dev_attrib_attribute \ 687 target_core_dev_attrib_##_name = \ 688 __CONFIGFS_EATTR_RO(_name, \ 689 target_core_dev_show_attr_##_name); 690 691 DEF_DEV_ATTRIB(emulate_dpo); 692 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR); 693 694 DEF_DEV_ATTRIB(emulate_fua_write); 695 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR); 696 697 DEF_DEV_ATTRIB(emulate_fua_read); 698 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR); 699 700 DEF_DEV_ATTRIB(emulate_write_cache); 701 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR); 702 703 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl); 704 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR); 705 706 DEF_DEV_ATTRIB(emulate_tas); 707 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR); 708 709 DEF_DEV_ATTRIB(emulate_tpu); 710 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR); 711 712 DEF_DEV_ATTRIB(emulate_tpws); 713 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR); 714 715 DEF_DEV_ATTRIB(enforce_pr_isids); 716 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR); 717 718 DEF_DEV_ATTRIB_RO(hw_block_size); 719 SE_DEV_ATTR_RO(hw_block_size); 720 721 DEF_DEV_ATTRIB(block_size); 722 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR); 723 724 DEF_DEV_ATTRIB_RO(hw_max_sectors); 725 SE_DEV_ATTR_RO(hw_max_sectors); 726 727 DEF_DEV_ATTRIB(max_sectors); 728 SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR); 729 730 DEF_DEV_ATTRIB(optimal_sectors); 731 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR); 732 733 DEF_DEV_ATTRIB_RO(hw_queue_depth); 734 SE_DEV_ATTR_RO(hw_queue_depth); 735 736 DEF_DEV_ATTRIB(queue_depth); 737 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR); 738 739 DEF_DEV_ATTRIB(task_timeout); 740 SE_DEV_ATTR(task_timeout, S_IRUGO | S_IWUSR); 741 742 DEF_DEV_ATTRIB(max_unmap_lba_count); 743 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR); 744 745 DEF_DEV_ATTRIB(max_unmap_block_desc_count); 746 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR); 747 748 DEF_DEV_ATTRIB(unmap_granularity); 749 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR); 750 751 DEF_DEV_ATTRIB(unmap_granularity_alignment); 752 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR); 753 754 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group); 755 756 static struct configfs_attribute *target_core_dev_attrib_attrs[] = { 757 &target_core_dev_attrib_emulate_dpo.attr, 758 &target_core_dev_attrib_emulate_fua_write.attr, 759 &target_core_dev_attrib_emulate_fua_read.attr, 760 &target_core_dev_attrib_emulate_write_cache.attr, 761 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr, 762 &target_core_dev_attrib_emulate_tas.attr, 763 &target_core_dev_attrib_emulate_tpu.attr, 764 &target_core_dev_attrib_emulate_tpws.attr, 765 &target_core_dev_attrib_enforce_pr_isids.attr, 766 &target_core_dev_attrib_hw_block_size.attr, 767 &target_core_dev_attrib_block_size.attr, 768 &target_core_dev_attrib_hw_max_sectors.attr, 769 &target_core_dev_attrib_max_sectors.attr, 770 &target_core_dev_attrib_optimal_sectors.attr, 771 &target_core_dev_attrib_hw_queue_depth.attr, 772 &target_core_dev_attrib_queue_depth.attr, 773 &target_core_dev_attrib_task_timeout.attr, 774 &target_core_dev_attrib_max_unmap_lba_count.attr, 775 &target_core_dev_attrib_max_unmap_block_desc_count.attr, 776 &target_core_dev_attrib_unmap_granularity.attr, 777 &target_core_dev_attrib_unmap_granularity_alignment.attr, 778 NULL, 779 }; 780 781 static struct configfs_item_operations target_core_dev_attrib_ops = { 782 .show_attribute = target_core_dev_attrib_attr_show, 783 .store_attribute = target_core_dev_attrib_attr_store, 784 }; 785 786 static struct config_item_type target_core_dev_attrib_cit = { 787 .ct_item_ops = &target_core_dev_attrib_ops, 788 .ct_attrs = target_core_dev_attrib_attrs, 789 .ct_owner = THIS_MODULE, 790 }; 791 792 /* End functions for struct config_item_type target_core_dev_attrib_cit */ 793 794 /* Start functions for struct config_item_type target_core_dev_wwn_cit */ 795 796 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn); 797 #define SE_DEV_WWN_ATTR(_name, _mode) \ 798 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \ 799 __CONFIGFS_EATTR(_name, _mode, \ 800 target_core_dev_wwn_show_attr_##_name, \ 801 target_core_dev_wwn_store_attr_##_name); 802 803 #define SE_DEV_WWN_ATTR_RO(_name); \ 804 do { \ 805 static struct target_core_dev_wwn_attribute \ 806 target_core_dev_wwn_##_name = \ 807 __CONFIGFS_EATTR_RO(_name, \ 808 target_core_dev_wwn_show_attr_##_name); \ 809 } while (0); 810 811 /* 812 * VPD page 0x80 Unit serial 813 */ 814 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial( 815 struct t10_wwn *t10_wwn, 816 char *page) 817 { 818 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; 819 struct se_device *dev; 820 821 dev = se_dev->se_dev_ptr; 822 if (!(dev)) 823 return -ENODEV; 824 825 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 826 &t10_wwn->unit_serial[0]); 827 } 828 829 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial( 830 struct t10_wwn *t10_wwn, 831 const char *page, 832 size_t count) 833 { 834 struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev; 835 struct se_device *dev; 836 unsigned char buf[INQUIRY_VPD_SERIAL_LEN]; 837 838 /* 839 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 840 * from the struct scsi_device level firmware, do not allow 841 * VPD Unit Serial to be emulated. 842 * 843 * Note this struct scsi_device could also be emulating VPD 844 * information from its drivers/scsi LLD. But for now we assume 845 * it is doing 'the right thing' wrt a world wide unique 846 * VPD Unit Serial Number that OS dependent multipath can depend on. 847 */ 848 if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) { 849 printk(KERN_ERR "Underlying SCSI device firmware provided VPD" 850 " Unit Serial, ignoring request\n"); 851 return -EOPNOTSUPP; 852 } 853 854 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 855 printk(KERN_ERR "Emulated VPD Unit Serial exceeds" 856 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 857 return -EOVERFLOW; 858 } 859 /* 860 * Check to see if any active $FABRIC_MOD exports exist. If they 861 * do exist, fail here as changing this information on the fly 862 * (underneath the initiator side OS dependent multipath code) 863 * could cause negative effects. 864 */ 865 dev = su_dev->se_dev_ptr; 866 if ((dev)) { 867 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 868 printk(KERN_ERR "Unable to set VPD Unit Serial while" 869 " active %d $FABRIC_MOD exports exist\n", 870 atomic_read(&dev->dev_export_obj.obj_access_count)); 871 return -EINVAL; 872 } 873 } 874 /* 875 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 876 * 877 * Also, strip any newline added from the userspace 878 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 879 */ 880 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN); 881 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 882 snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 883 "%s", strstrip(buf)); 884 su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL; 885 886 printk(KERN_INFO "Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 887 " %s\n", su_dev->t10_wwn.unit_serial); 888 889 return count; 890 } 891 892 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR); 893 894 /* 895 * VPD page 0x83 Protocol Identifier 896 */ 897 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier( 898 struct t10_wwn *t10_wwn, 899 char *page) 900 { 901 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; 902 struct se_device *dev; 903 struct t10_vpd *vpd; 904 unsigned char buf[VPD_TMP_BUF_SIZE]; 905 ssize_t len = 0; 906 907 dev = se_dev->se_dev_ptr; 908 if (!(dev)) 909 return -ENODEV; 910 911 memset(buf, 0, VPD_TMP_BUF_SIZE); 912 913 spin_lock(&t10_wwn->t10_vpd_lock); 914 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 915 if (!(vpd->protocol_identifier_set)) 916 continue; 917 918 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 919 920 if ((len + strlen(buf) >= PAGE_SIZE)) 921 break; 922 923 len += sprintf(page+len, "%s", buf); 924 } 925 spin_unlock(&t10_wwn->t10_vpd_lock); 926 927 return len; 928 } 929 930 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier( 931 struct t10_wwn *t10_wwn, 932 const char *page, 933 size_t count) 934 { 935 return -ENOSYS; 936 } 937 938 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR); 939 940 /* 941 * Generic wrapper for dumping VPD identifiers by association. 942 */ 943 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 944 static ssize_t target_core_dev_wwn_show_attr_##_name( \ 945 struct t10_wwn *t10_wwn, \ 946 char *page) \ 947 { \ 948 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; \ 949 struct se_device *dev; \ 950 struct t10_vpd *vpd; \ 951 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 952 ssize_t len = 0; \ 953 \ 954 dev = se_dev->se_dev_ptr; \ 955 if (!(dev)) \ 956 return -ENODEV; \ 957 \ 958 spin_lock(&t10_wwn->t10_vpd_lock); \ 959 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 960 if (vpd->association != _assoc) \ 961 continue; \ 962 \ 963 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 964 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 965 if ((len + strlen(buf) >= PAGE_SIZE)) \ 966 break; \ 967 len += sprintf(page+len, "%s", buf); \ 968 \ 969 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 970 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 971 if ((len + strlen(buf) >= PAGE_SIZE)) \ 972 break; \ 973 len += sprintf(page+len, "%s", buf); \ 974 \ 975 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 976 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 977 if ((len + strlen(buf) >= PAGE_SIZE)) \ 978 break; \ 979 len += sprintf(page+len, "%s", buf); \ 980 } \ 981 spin_unlock(&t10_wwn->t10_vpd_lock); \ 982 \ 983 return len; \ 984 } 985 986 /* 987 * VPD page 0x83 Assoication: Logical Unit 988 */ 989 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 990 991 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit( 992 struct t10_wwn *t10_wwn, 993 const char *page, 994 size_t count) 995 { 996 return -ENOSYS; 997 } 998 999 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR); 1000 1001 /* 1002 * VPD page 0x83 Association: Target Port 1003 */ 1004 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 1005 1006 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port( 1007 struct t10_wwn *t10_wwn, 1008 const char *page, 1009 size_t count) 1010 { 1011 return -ENOSYS; 1012 } 1013 1014 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR); 1015 1016 /* 1017 * VPD page 0x83 Association: SCSI Target Device 1018 */ 1019 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 1020 1021 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device( 1022 struct t10_wwn *t10_wwn, 1023 const char *page, 1024 size_t count) 1025 { 1026 return -ENOSYS; 1027 } 1028 1029 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR); 1030 1031 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group); 1032 1033 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 1034 &target_core_dev_wwn_vpd_unit_serial.attr, 1035 &target_core_dev_wwn_vpd_protocol_identifier.attr, 1036 &target_core_dev_wwn_vpd_assoc_logical_unit.attr, 1037 &target_core_dev_wwn_vpd_assoc_target_port.attr, 1038 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr, 1039 NULL, 1040 }; 1041 1042 static struct configfs_item_operations target_core_dev_wwn_ops = { 1043 .show_attribute = target_core_dev_wwn_attr_show, 1044 .store_attribute = target_core_dev_wwn_attr_store, 1045 }; 1046 1047 static struct config_item_type target_core_dev_wwn_cit = { 1048 .ct_item_ops = &target_core_dev_wwn_ops, 1049 .ct_attrs = target_core_dev_wwn_attrs, 1050 .ct_owner = THIS_MODULE, 1051 }; 1052 1053 /* End functions for struct config_item_type target_core_dev_wwn_cit */ 1054 1055 /* Start functions for struct config_item_type target_core_dev_pr_cit */ 1056 1057 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev); 1058 #define SE_DEV_PR_ATTR(_name, _mode) \ 1059 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 1060 __CONFIGFS_EATTR(_name, _mode, \ 1061 target_core_dev_pr_show_attr_##_name, \ 1062 target_core_dev_pr_store_attr_##_name); 1063 1064 #define SE_DEV_PR_ATTR_RO(_name); \ 1065 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 1066 __CONFIGFS_EATTR_RO(_name, \ 1067 target_core_dev_pr_show_attr_##_name); 1068 1069 /* 1070 * res_holder 1071 */ 1072 static ssize_t target_core_dev_pr_show_spc3_res( 1073 struct se_device *dev, 1074 char *page, 1075 ssize_t *len) 1076 { 1077 struct se_node_acl *se_nacl; 1078 struct t10_pr_registration *pr_reg; 1079 char i_buf[PR_REG_ISID_ID_LEN]; 1080 int prf_isid; 1081 1082 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1083 1084 spin_lock(&dev->dev_reservation_lock); 1085 pr_reg = dev->dev_pr_res_holder; 1086 if (!(pr_reg)) { 1087 *len += sprintf(page + *len, "No SPC-3 Reservation holder\n"); 1088 spin_unlock(&dev->dev_reservation_lock); 1089 return *len; 1090 } 1091 se_nacl = pr_reg->pr_reg_nacl; 1092 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 1093 PR_REG_ISID_ID_LEN); 1094 1095 *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n", 1096 TPG_TFO(se_nacl->se_tpg)->get_fabric_name(), 1097 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : ""); 1098 spin_unlock(&dev->dev_reservation_lock); 1099 1100 return *len; 1101 } 1102 1103 static ssize_t target_core_dev_pr_show_spc2_res( 1104 struct se_device *dev, 1105 char *page, 1106 ssize_t *len) 1107 { 1108 struct se_node_acl *se_nacl; 1109 1110 spin_lock(&dev->dev_reservation_lock); 1111 se_nacl = dev->dev_reserved_node_acl; 1112 if (!(se_nacl)) { 1113 *len += sprintf(page + *len, "No SPC-2 Reservation holder\n"); 1114 spin_unlock(&dev->dev_reservation_lock); 1115 return *len; 1116 } 1117 *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n", 1118 TPG_TFO(se_nacl->se_tpg)->get_fabric_name(), 1119 se_nacl->initiatorname); 1120 spin_unlock(&dev->dev_reservation_lock); 1121 1122 return *len; 1123 } 1124 1125 static ssize_t target_core_dev_pr_show_attr_res_holder( 1126 struct se_subsystem_dev *su_dev, 1127 char *page) 1128 { 1129 ssize_t len = 0; 1130 1131 if (!(su_dev->se_dev_ptr)) 1132 return -ENODEV; 1133 1134 switch (T10_RES(su_dev)->res_type) { 1135 case SPC3_PERSISTENT_RESERVATIONS: 1136 target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr, 1137 page, &len); 1138 break; 1139 case SPC2_RESERVATIONS: 1140 target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr, 1141 page, &len); 1142 break; 1143 case SPC_PASSTHROUGH: 1144 len += sprintf(page+len, "Passthrough\n"); 1145 break; 1146 default: 1147 len += sprintf(page+len, "Unknown\n"); 1148 break; 1149 } 1150 1151 return len; 1152 } 1153 1154 SE_DEV_PR_ATTR_RO(res_holder); 1155 1156 /* 1157 * res_pr_all_tgt_pts 1158 */ 1159 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts( 1160 struct se_subsystem_dev *su_dev, 1161 char *page) 1162 { 1163 struct se_device *dev; 1164 struct t10_pr_registration *pr_reg; 1165 ssize_t len = 0; 1166 1167 dev = su_dev->se_dev_ptr; 1168 if (!(dev)) 1169 return -ENODEV; 1170 1171 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS) 1172 return len; 1173 1174 spin_lock(&dev->dev_reservation_lock); 1175 pr_reg = dev->dev_pr_res_holder; 1176 if (!(pr_reg)) { 1177 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1178 spin_unlock(&dev->dev_reservation_lock); 1179 return len; 1180 } 1181 /* 1182 * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3 1183 * Basic PERSISTENT RESERVER OUT parameter list, page 290 1184 */ 1185 if (pr_reg->pr_reg_all_tg_pt) 1186 len = sprintf(page, "SPC-3 Reservation: All Target" 1187 " Ports registration\n"); 1188 else 1189 len = sprintf(page, "SPC-3 Reservation: Single" 1190 " Target Port registration\n"); 1191 spin_unlock(&dev->dev_reservation_lock); 1192 1193 return len; 1194 } 1195 1196 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts); 1197 1198 /* 1199 * res_pr_generation 1200 */ 1201 static ssize_t target_core_dev_pr_show_attr_res_pr_generation( 1202 struct se_subsystem_dev *su_dev, 1203 char *page) 1204 { 1205 if (!(su_dev->se_dev_ptr)) 1206 return -ENODEV; 1207 1208 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS) 1209 return 0; 1210 1211 return sprintf(page, "0x%08x\n", T10_RES(su_dev)->pr_generation); 1212 } 1213 1214 SE_DEV_PR_ATTR_RO(res_pr_generation); 1215 1216 /* 1217 * res_pr_holder_tg_port 1218 */ 1219 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port( 1220 struct se_subsystem_dev *su_dev, 1221 char *page) 1222 { 1223 struct se_device *dev; 1224 struct se_node_acl *se_nacl; 1225 struct se_lun *lun; 1226 struct se_portal_group *se_tpg; 1227 struct t10_pr_registration *pr_reg; 1228 struct target_core_fabric_ops *tfo; 1229 ssize_t len = 0; 1230 1231 dev = su_dev->se_dev_ptr; 1232 if (!(dev)) 1233 return -ENODEV; 1234 1235 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS) 1236 return len; 1237 1238 spin_lock(&dev->dev_reservation_lock); 1239 pr_reg = dev->dev_pr_res_holder; 1240 if (!(pr_reg)) { 1241 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1242 spin_unlock(&dev->dev_reservation_lock); 1243 return len; 1244 } 1245 se_nacl = pr_reg->pr_reg_nacl; 1246 se_tpg = se_nacl->se_tpg; 1247 lun = pr_reg->pr_reg_tg_pt_lun; 1248 tfo = TPG_TFO(se_tpg); 1249 1250 len += sprintf(page+len, "SPC-3 Reservation: %s" 1251 " Target Node Endpoint: %s\n", tfo->get_fabric_name(), 1252 tfo->tpg_get_wwn(se_tpg)); 1253 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1254 " Identifer Tag: %hu %s Portal Group Tag: %hu" 1255 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi, 1256 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg), 1257 tfo->get_fabric_name(), lun->unpacked_lun); 1258 spin_unlock(&dev->dev_reservation_lock); 1259 1260 return len; 1261 } 1262 1263 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port); 1264 1265 /* 1266 * res_pr_registered_i_pts 1267 */ 1268 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts( 1269 struct se_subsystem_dev *su_dev, 1270 char *page) 1271 { 1272 struct target_core_fabric_ops *tfo; 1273 struct t10_pr_registration *pr_reg; 1274 unsigned char buf[384]; 1275 char i_buf[PR_REG_ISID_ID_LEN]; 1276 ssize_t len = 0; 1277 int reg_count = 0, prf_isid; 1278 1279 if (!(su_dev->se_dev_ptr)) 1280 return -ENODEV; 1281 1282 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS) 1283 return len; 1284 1285 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1286 1287 spin_lock(&T10_RES(su_dev)->registration_lock); 1288 list_for_each_entry(pr_reg, &T10_RES(su_dev)->registration_list, 1289 pr_reg_list) { 1290 1291 memset(buf, 0, 384); 1292 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1293 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1294 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 1295 PR_REG_ISID_ID_LEN); 1296 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1297 tfo->get_fabric_name(), 1298 pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ? 1299 &i_buf[0] : "", pr_reg->pr_res_key, 1300 pr_reg->pr_res_generation); 1301 1302 if ((len + strlen(buf) >= PAGE_SIZE)) 1303 break; 1304 1305 len += sprintf(page+len, "%s", buf); 1306 reg_count++; 1307 } 1308 spin_unlock(&T10_RES(su_dev)->registration_lock); 1309 1310 if (!(reg_count)) 1311 len += sprintf(page+len, "None\n"); 1312 1313 return len; 1314 } 1315 1316 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts); 1317 1318 /* 1319 * res_pr_type 1320 */ 1321 static ssize_t target_core_dev_pr_show_attr_res_pr_type( 1322 struct se_subsystem_dev *su_dev, 1323 char *page) 1324 { 1325 struct se_device *dev; 1326 struct t10_pr_registration *pr_reg; 1327 ssize_t len = 0; 1328 1329 dev = su_dev->se_dev_ptr; 1330 if (!(dev)) 1331 return -ENODEV; 1332 1333 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS) 1334 return len; 1335 1336 spin_lock(&dev->dev_reservation_lock); 1337 pr_reg = dev->dev_pr_res_holder; 1338 if (!(pr_reg)) { 1339 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1340 spin_unlock(&dev->dev_reservation_lock); 1341 return len; 1342 } 1343 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1344 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 1345 spin_unlock(&dev->dev_reservation_lock); 1346 1347 return len; 1348 } 1349 1350 SE_DEV_PR_ATTR_RO(res_pr_type); 1351 1352 /* 1353 * res_type 1354 */ 1355 static ssize_t target_core_dev_pr_show_attr_res_type( 1356 struct se_subsystem_dev *su_dev, 1357 char *page) 1358 { 1359 ssize_t len = 0; 1360 1361 if (!(su_dev->se_dev_ptr)) 1362 return -ENODEV; 1363 1364 switch (T10_RES(su_dev)->res_type) { 1365 case SPC3_PERSISTENT_RESERVATIONS: 1366 len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 1367 break; 1368 case SPC2_RESERVATIONS: 1369 len = sprintf(page, "SPC2_RESERVATIONS\n"); 1370 break; 1371 case SPC_PASSTHROUGH: 1372 len = sprintf(page, "SPC_PASSTHROUGH\n"); 1373 break; 1374 default: 1375 len = sprintf(page, "UNKNOWN\n"); 1376 break; 1377 } 1378 1379 return len; 1380 } 1381 1382 SE_DEV_PR_ATTR_RO(res_type); 1383 1384 /* 1385 * res_aptpl_active 1386 */ 1387 1388 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active( 1389 struct se_subsystem_dev *su_dev, 1390 char *page) 1391 { 1392 if (!(su_dev->se_dev_ptr)) 1393 return -ENODEV; 1394 1395 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS) 1396 return 0; 1397 1398 return sprintf(page, "APTPL Bit Status: %s\n", 1399 (T10_RES(su_dev)->pr_aptpl_active) ? "Activated" : "Disabled"); 1400 } 1401 1402 SE_DEV_PR_ATTR_RO(res_aptpl_active); 1403 1404 /* 1405 * res_aptpl_metadata 1406 */ 1407 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata( 1408 struct se_subsystem_dev *su_dev, 1409 char *page) 1410 { 1411 if (!(su_dev->se_dev_ptr)) 1412 return -ENODEV; 1413 1414 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS) 1415 return 0; 1416 1417 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 1418 } 1419 1420 enum { 1421 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 1422 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 1423 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 1424 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 1425 }; 1426 1427 static match_table_t tokens = { 1428 {Opt_initiator_fabric, "initiator_fabric=%s"}, 1429 {Opt_initiator_node, "initiator_node=%s"}, 1430 {Opt_initiator_sid, "initiator_sid=%s"}, 1431 {Opt_sa_res_key, "sa_res_key=%s"}, 1432 {Opt_res_holder, "res_holder=%d"}, 1433 {Opt_res_type, "res_type=%d"}, 1434 {Opt_res_scope, "res_scope=%d"}, 1435 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 1436 {Opt_mapped_lun, "mapped_lun=%d"}, 1437 {Opt_target_fabric, "target_fabric=%s"}, 1438 {Opt_target_node, "target_node=%s"}, 1439 {Opt_tpgt, "tpgt=%d"}, 1440 {Opt_port_rtpi, "port_rtpi=%d"}, 1441 {Opt_target_lun, "target_lun=%d"}, 1442 {Opt_err, NULL} 1443 }; 1444 1445 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata( 1446 struct se_subsystem_dev *su_dev, 1447 const char *page, 1448 size_t count) 1449 { 1450 struct se_device *dev; 1451 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 1452 unsigned char *t_fabric = NULL, *t_port = NULL; 1453 char *orig, *ptr, *arg_p, *opts; 1454 substring_t args[MAX_OPT_ARGS]; 1455 unsigned long long tmp_ll; 1456 u64 sa_res_key = 0; 1457 u32 mapped_lun = 0, target_lun = 0; 1458 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 1459 u16 port_rpti = 0, tpgt = 0; 1460 u8 type = 0, scope; 1461 1462 dev = su_dev->se_dev_ptr; 1463 if (!(dev)) 1464 return -ENODEV; 1465 1466 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS) 1467 return 0; 1468 1469 if (atomic_read(&dev->dev_export_obj.obj_access_count)) { 1470 printk(KERN_INFO "Unable to process APTPL metadata while" 1471 " active fabric exports exist\n"); 1472 return -EINVAL; 1473 } 1474 1475 opts = kstrdup(page, GFP_KERNEL); 1476 if (!opts) 1477 return -ENOMEM; 1478 1479 orig = opts; 1480 while ((ptr = strsep(&opts, ",")) != NULL) { 1481 if (!*ptr) 1482 continue; 1483 1484 token = match_token(ptr, tokens, args); 1485 switch (token) { 1486 case Opt_initiator_fabric: 1487 i_fabric = match_strdup(&args[0]); 1488 if (!i_fabric) { 1489 ret = -ENOMEM; 1490 goto out; 1491 } 1492 break; 1493 case Opt_initiator_node: 1494 i_port = match_strdup(&args[0]); 1495 if (!i_port) { 1496 ret = -ENOMEM; 1497 goto out; 1498 } 1499 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 1500 printk(KERN_ERR "APTPL metadata initiator_node=" 1501 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 1502 PR_APTPL_MAX_IPORT_LEN); 1503 ret = -EINVAL; 1504 break; 1505 } 1506 break; 1507 case Opt_initiator_sid: 1508 isid = match_strdup(&args[0]); 1509 if (!isid) { 1510 ret = -ENOMEM; 1511 goto out; 1512 } 1513 if (strlen(isid) >= PR_REG_ISID_LEN) { 1514 printk(KERN_ERR "APTPL metadata initiator_isid" 1515 "= exceeds PR_REG_ISID_LEN: %d\n", 1516 PR_REG_ISID_LEN); 1517 ret = -EINVAL; 1518 break; 1519 } 1520 break; 1521 case Opt_sa_res_key: 1522 arg_p = match_strdup(&args[0]); 1523 if (!arg_p) { 1524 ret = -ENOMEM; 1525 goto out; 1526 } 1527 ret = strict_strtoull(arg_p, 0, &tmp_ll); 1528 if (ret < 0) { 1529 printk(KERN_ERR "strict_strtoull() failed for" 1530 " sa_res_key=\n"); 1531 goto out; 1532 } 1533 sa_res_key = (u64)tmp_ll; 1534 break; 1535 /* 1536 * PR APTPL Metadata for Reservation 1537 */ 1538 case Opt_res_holder: 1539 match_int(args, &arg); 1540 res_holder = arg; 1541 break; 1542 case Opt_res_type: 1543 match_int(args, &arg); 1544 type = (u8)arg; 1545 break; 1546 case Opt_res_scope: 1547 match_int(args, &arg); 1548 scope = (u8)arg; 1549 break; 1550 case Opt_res_all_tg_pt: 1551 match_int(args, &arg); 1552 all_tg_pt = (int)arg; 1553 break; 1554 case Opt_mapped_lun: 1555 match_int(args, &arg); 1556 mapped_lun = (u32)arg; 1557 break; 1558 /* 1559 * PR APTPL Metadata for Target Port 1560 */ 1561 case Opt_target_fabric: 1562 t_fabric = match_strdup(&args[0]); 1563 if (!t_fabric) { 1564 ret = -ENOMEM; 1565 goto out; 1566 } 1567 break; 1568 case Opt_target_node: 1569 t_port = match_strdup(&args[0]); 1570 if (!t_port) { 1571 ret = -ENOMEM; 1572 goto out; 1573 } 1574 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 1575 printk(KERN_ERR "APTPL metadata target_node=" 1576 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 1577 PR_APTPL_MAX_TPORT_LEN); 1578 ret = -EINVAL; 1579 break; 1580 } 1581 break; 1582 case Opt_tpgt: 1583 match_int(args, &arg); 1584 tpgt = (u16)arg; 1585 break; 1586 case Opt_port_rtpi: 1587 match_int(args, &arg); 1588 port_rpti = (u16)arg; 1589 break; 1590 case Opt_target_lun: 1591 match_int(args, &arg); 1592 target_lun = (u32)arg; 1593 break; 1594 default: 1595 break; 1596 } 1597 } 1598 1599 if (!(i_port) || !(t_port) || !(sa_res_key)) { 1600 printk(KERN_ERR "Illegal parameters for APTPL registration\n"); 1601 ret = -EINVAL; 1602 goto out; 1603 } 1604 1605 if (res_holder && !(type)) { 1606 printk(KERN_ERR "Illegal PR type: 0x%02x for reservation" 1607 " holder\n", type); 1608 ret = -EINVAL; 1609 goto out; 1610 } 1611 1612 ret = core_scsi3_alloc_aptpl_registration(T10_RES(su_dev), sa_res_key, 1613 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 1614 res_holder, all_tg_pt, type); 1615 out: 1616 kfree(i_fabric); 1617 kfree(i_port); 1618 kfree(isid); 1619 kfree(t_fabric); 1620 kfree(t_port); 1621 kfree(orig); 1622 return (ret == 0) ? count : ret; 1623 } 1624 1625 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR); 1626 1627 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group); 1628 1629 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 1630 &target_core_dev_pr_res_holder.attr, 1631 &target_core_dev_pr_res_pr_all_tgt_pts.attr, 1632 &target_core_dev_pr_res_pr_generation.attr, 1633 &target_core_dev_pr_res_pr_holder_tg_port.attr, 1634 &target_core_dev_pr_res_pr_registered_i_pts.attr, 1635 &target_core_dev_pr_res_pr_type.attr, 1636 &target_core_dev_pr_res_type.attr, 1637 &target_core_dev_pr_res_aptpl_active.attr, 1638 &target_core_dev_pr_res_aptpl_metadata.attr, 1639 NULL, 1640 }; 1641 1642 static struct configfs_item_operations target_core_dev_pr_ops = { 1643 .show_attribute = target_core_dev_pr_attr_show, 1644 .store_attribute = target_core_dev_pr_attr_store, 1645 }; 1646 1647 static struct config_item_type target_core_dev_pr_cit = { 1648 .ct_item_ops = &target_core_dev_pr_ops, 1649 .ct_attrs = target_core_dev_pr_attrs, 1650 .ct_owner = THIS_MODULE, 1651 }; 1652 1653 /* End functions for struct config_item_type target_core_dev_pr_cit */ 1654 1655 /* Start functions for struct config_item_type target_core_dev_cit */ 1656 1657 static ssize_t target_core_show_dev_info(void *p, char *page) 1658 { 1659 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1660 struct se_hba *hba = se_dev->se_dev_hba; 1661 struct se_subsystem_api *t = hba->transport; 1662 int bl = 0; 1663 ssize_t read_bytes = 0; 1664 1665 if (!(se_dev->se_dev_ptr)) 1666 return -ENODEV; 1667 1668 transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl); 1669 read_bytes += bl; 1670 read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes); 1671 return read_bytes; 1672 } 1673 1674 static struct target_core_configfs_attribute target_core_attr_dev_info = { 1675 .attr = { .ca_owner = THIS_MODULE, 1676 .ca_name = "info", 1677 .ca_mode = S_IRUGO }, 1678 .show = target_core_show_dev_info, 1679 .store = NULL, 1680 }; 1681 1682 static ssize_t target_core_store_dev_control( 1683 void *p, 1684 const char *page, 1685 size_t count) 1686 { 1687 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1688 struct se_hba *hba = se_dev->se_dev_hba; 1689 struct se_subsystem_api *t = hba->transport; 1690 1691 if (!(se_dev->se_dev_su_ptr)) { 1692 printk(KERN_ERR "Unable to locate struct se_subsystem_dev>se" 1693 "_dev_su_ptr\n"); 1694 return -EINVAL; 1695 } 1696 1697 return t->set_configfs_dev_params(hba, se_dev, page, count); 1698 } 1699 1700 static struct target_core_configfs_attribute target_core_attr_dev_control = { 1701 .attr = { .ca_owner = THIS_MODULE, 1702 .ca_name = "control", 1703 .ca_mode = S_IWUSR }, 1704 .show = NULL, 1705 .store = target_core_store_dev_control, 1706 }; 1707 1708 static ssize_t target_core_show_dev_alias(void *p, char *page) 1709 { 1710 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1711 1712 if (!(se_dev->su_dev_flags & SDF_USING_ALIAS)) 1713 return 0; 1714 1715 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias); 1716 } 1717 1718 static ssize_t target_core_store_dev_alias( 1719 void *p, 1720 const char *page, 1721 size_t count) 1722 { 1723 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1724 struct se_hba *hba = se_dev->se_dev_hba; 1725 ssize_t read_bytes; 1726 1727 if (count > (SE_DEV_ALIAS_LEN-1)) { 1728 printk(KERN_ERR "alias count: %d exceeds" 1729 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 1730 SE_DEV_ALIAS_LEN-1); 1731 return -EINVAL; 1732 } 1733 1734 se_dev->su_dev_flags |= SDF_USING_ALIAS; 1735 read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN, 1736 "%s", page); 1737 1738 printk(KERN_INFO "Target_Core_ConfigFS: %s/%s set alias: %s\n", 1739 config_item_name(&hba->hba_group.cg_item), 1740 config_item_name(&se_dev->se_dev_group.cg_item), 1741 se_dev->se_dev_alias); 1742 1743 return read_bytes; 1744 } 1745 1746 static struct target_core_configfs_attribute target_core_attr_dev_alias = { 1747 .attr = { .ca_owner = THIS_MODULE, 1748 .ca_name = "alias", 1749 .ca_mode = S_IRUGO | S_IWUSR }, 1750 .show = target_core_show_dev_alias, 1751 .store = target_core_store_dev_alias, 1752 }; 1753 1754 static ssize_t target_core_show_dev_udev_path(void *p, char *page) 1755 { 1756 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1757 1758 if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH)) 1759 return 0; 1760 1761 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path); 1762 } 1763 1764 static ssize_t target_core_store_dev_udev_path( 1765 void *p, 1766 const char *page, 1767 size_t count) 1768 { 1769 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1770 struct se_hba *hba = se_dev->se_dev_hba; 1771 ssize_t read_bytes; 1772 1773 if (count > (SE_UDEV_PATH_LEN-1)) { 1774 printk(KERN_ERR "udev_path count: %d exceeds" 1775 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 1776 SE_UDEV_PATH_LEN-1); 1777 return -EINVAL; 1778 } 1779 1780 se_dev->su_dev_flags |= SDF_USING_UDEV_PATH; 1781 read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN, 1782 "%s", page); 1783 1784 printk(KERN_INFO "Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 1785 config_item_name(&hba->hba_group.cg_item), 1786 config_item_name(&se_dev->se_dev_group.cg_item), 1787 se_dev->se_dev_udev_path); 1788 1789 return read_bytes; 1790 } 1791 1792 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = { 1793 .attr = { .ca_owner = THIS_MODULE, 1794 .ca_name = "udev_path", 1795 .ca_mode = S_IRUGO | S_IWUSR }, 1796 .show = target_core_show_dev_udev_path, 1797 .store = target_core_store_dev_udev_path, 1798 }; 1799 1800 static ssize_t target_core_store_dev_enable( 1801 void *p, 1802 const char *page, 1803 size_t count) 1804 { 1805 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; 1806 struct se_device *dev; 1807 struct se_hba *hba = se_dev->se_dev_hba; 1808 struct se_subsystem_api *t = hba->transport; 1809 char *ptr; 1810 1811 ptr = strstr(page, "1"); 1812 if (!(ptr)) { 1813 printk(KERN_ERR "For dev_enable ops, only valid value" 1814 " is \"1\"\n"); 1815 return -EINVAL; 1816 } 1817 if ((se_dev->se_dev_ptr)) { 1818 printk(KERN_ERR "se_dev->se_dev_ptr already set for storage" 1819 " object\n"); 1820 return -EEXIST; 1821 } 1822 1823 if (t->check_configfs_dev_params(hba, se_dev) < 0) 1824 return -EINVAL; 1825 1826 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr); 1827 if (IS_ERR(dev)) 1828 return PTR_ERR(dev); 1829 else if (!dev) 1830 return -EINVAL; 1831 1832 se_dev->se_dev_ptr = dev; 1833 printk(KERN_INFO "Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:" 1834 " %p\n", se_dev->se_dev_ptr); 1835 1836 return count; 1837 } 1838 1839 static struct target_core_configfs_attribute target_core_attr_dev_enable = { 1840 .attr = { .ca_owner = THIS_MODULE, 1841 .ca_name = "enable", 1842 .ca_mode = S_IWUSR }, 1843 .show = NULL, 1844 .store = target_core_store_dev_enable, 1845 }; 1846 1847 static ssize_t target_core_show_alua_lu_gp(void *p, char *page) 1848 { 1849 struct se_device *dev; 1850 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p; 1851 struct config_item *lu_ci; 1852 struct t10_alua_lu_gp *lu_gp; 1853 struct t10_alua_lu_gp_member *lu_gp_mem; 1854 ssize_t len = 0; 1855 1856 dev = su_dev->se_dev_ptr; 1857 if (!(dev)) 1858 return -ENODEV; 1859 1860 if (T10_ALUA(su_dev)->alua_type != SPC3_ALUA_EMULATED) 1861 return len; 1862 1863 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1864 if (!(lu_gp_mem)) { 1865 printk(KERN_ERR "NULL struct se_device->dev_alua_lu_gp_mem" 1866 " pointer\n"); 1867 return -EINVAL; 1868 } 1869 1870 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1871 lu_gp = lu_gp_mem->lu_gp; 1872 if ((lu_gp)) { 1873 lu_ci = &lu_gp->lu_gp_group.cg_item; 1874 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 1875 config_item_name(lu_ci), lu_gp->lu_gp_id); 1876 } 1877 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1878 1879 return len; 1880 } 1881 1882 static ssize_t target_core_store_alua_lu_gp( 1883 void *p, 1884 const char *page, 1885 size_t count) 1886 { 1887 struct se_device *dev; 1888 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p; 1889 struct se_hba *hba = su_dev->se_dev_hba; 1890 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 1891 struct t10_alua_lu_gp_member *lu_gp_mem; 1892 unsigned char buf[LU_GROUP_NAME_BUF]; 1893 int move = 0; 1894 1895 dev = su_dev->se_dev_ptr; 1896 if (!(dev)) 1897 return -ENODEV; 1898 1899 if (T10_ALUA(su_dev)->alua_type != SPC3_ALUA_EMULATED) { 1900 printk(KERN_WARNING "SPC3_ALUA_EMULATED not enabled for %s/%s\n", 1901 config_item_name(&hba->hba_group.cg_item), 1902 config_item_name(&su_dev->se_dev_group.cg_item)); 1903 return -EINVAL; 1904 } 1905 if (count > LU_GROUP_NAME_BUF) { 1906 printk(KERN_ERR "ALUA LU Group Alias too large!\n"); 1907 return -EINVAL; 1908 } 1909 memset(buf, 0, LU_GROUP_NAME_BUF); 1910 memcpy(buf, page, count); 1911 /* 1912 * Any ALUA logical unit alias besides "NULL" means we will be 1913 * making a new group association. 1914 */ 1915 if (strcmp(strstrip(buf), "NULL")) { 1916 /* 1917 * core_alua_get_lu_gp_by_name() will increment reference to 1918 * struct t10_alua_lu_gp. This reference is released with 1919 * core_alua_get_lu_gp_by_name below(). 1920 */ 1921 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 1922 if (!(lu_gp_new)) 1923 return -ENODEV; 1924 } 1925 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1926 if (!(lu_gp_mem)) { 1927 if (lu_gp_new) 1928 core_alua_put_lu_gp_from_name(lu_gp_new); 1929 printk(KERN_ERR "NULL struct se_device->dev_alua_lu_gp_mem" 1930 " pointer\n"); 1931 return -EINVAL; 1932 } 1933 1934 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1935 lu_gp = lu_gp_mem->lu_gp; 1936 if ((lu_gp)) { 1937 /* 1938 * Clearing an existing lu_gp association, and replacing 1939 * with NULL 1940 */ 1941 if (!(lu_gp_new)) { 1942 printk(KERN_INFO "Target_Core_ConfigFS: Releasing %s/%s" 1943 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 1944 " %hu\n", 1945 config_item_name(&hba->hba_group.cg_item), 1946 config_item_name(&su_dev->se_dev_group.cg_item), 1947 config_item_name(&lu_gp->lu_gp_group.cg_item), 1948 lu_gp->lu_gp_id); 1949 1950 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 1951 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1952 1953 return count; 1954 } 1955 /* 1956 * Removing existing association of lu_gp_mem with lu_gp 1957 */ 1958 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 1959 move = 1; 1960 } 1961 /* 1962 * Associate lu_gp_mem with lu_gp_new. 1963 */ 1964 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 1965 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1966 1967 printk(KERN_INFO "Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 1968 " core/alua/lu_gps/%s, ID: %hu\n", 1969 (move) ? "Moving" : "Adding", 1970 config_item_name(&hba->hba_group.cg_item), 1971 config_item_name(&su_dev->se_dev_group.cg_item), 1972 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 1973 lu_gp_new->lu_gp_id); 1974 1975 core_alua_put_lu_gp_from_name(lu_gp_new); 1976 return count; 1977 } 1978 1979 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = { 1980 .attr = { .ca_owner = THIS_MODULE, 1981 .ca_name = "alua_lu_gp", 1982 .ca_mode = S_IRUGO | S_IWUSR }, 1983 .show = target_core_show_alua_lu_gp, 1984 .store = target_core_store_alua_lu_gp, 1985 }; 1986 1987 static struct configfs_attribute *lio_core_dev_attrs[] = { 1988 &target_core_attr_dev_info.attr, 1989 &target_core_attr_dev_control.attr, 1990 &target_core_attr_dev_alias.attr, 1991 &target_core_attr_dev_udev_path.attr, 1992 &target_core_attr_dev_enable.attr, 1993 &target_core_attr_dev_alua_lu_gp.attr, 1994 NULL, 1995 }; 1996 1997 static void target_core_dev_release(struct config_item *item) 1998 { 1999 struct se_subsystem_dev *se_dev = container_of(to_config_group(item), 2000 struct se_subsystem_dev, se_dev_group); 2001 struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item); 2002 struct se_subsystem_api *t = hba->transport; 2003 struct config_group *dev_cg = &se_dev->se_dev_group; 2004 2005 kfree(dev_cg->default_groups); 2006 /* 2007 * This pointer will set when the storage is enabled with: 2008 *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable` 2009 */ 2010 if (se_dev->se_dev_ptr) { 2011 printk(KERN_INFO "Target_Core_ConfigFS: Calling se_free_" 2012 "virtual_device() for se_dev_ptr: %p\n", 2013 se_dev->se_dev_ptr); 2014 2015 se_free_virtual_device(se_dev->se_dev_ptr, hba); 2016 } else { 2017 /* 2018 * Release struct se_subsystem_dev->se_dev_su_ptr.. 2019 */ 2020 printk(KERN_INFO "Target_Core_ConfigFS: Calling t->free_" 2021 "device() for se_dev_su_ptr: %p\n", 2022 se_dev->se_dev_su_ptr); 2023 2024 t->free_device(se_dev->se_dev_su_ptr); 2025 } 2026 2027 printk(KERN_INFO "Target_Core_ConfigFS: Deallocating se_subsystem" 2028 "_dev_t: %p\n", se_dev); 2029 kfree(se_dev); 2030 } 2031 2032 static ssize_t target_core_dev_show(struct config_item *item, 2033 struct configfs_attribute *attr, 2034 char *page) 2035 { 2036 struct se_subsystem_dev *se_dev = container_of( 2037 to_config_group(item), struct se_subsystem_dev, 2038 se_dev_group); 2039 struct target_core_configfs_attribute *tc_attr = container_of( 2040 attr, struct target_core_configfs_attribute, attr); 2041 2042 if (!(tc_attr->show)) 2043 return -EINVAL; 2044 2045 return tc_attr->show((void *)se_dev, page); 2046 } 2047 2048 static ssize_t target_core_dev_store(struct config_item *item, 2049 struct configfs_attribute *attr, 2050 const char *page, size_t count) 2051 { 2052 struct se_subsystem_dev *se_dev = container_of( 2053 to_config_group(item), struct se_subsystem_dev, 2054 se_dev_group); 2055 struct target_core_configfs_attribute *tc_attr = container_of( 2056 attr, struct target_core_configfs_attribute, attr); 2057 2058 if (!(tc_attr->store)) 2059 return -EINVAL; 2060 2061 return tc_attr->store((void *)se_dev, page, count); 2062 } 2063 2064 static struct configfs_item_operations target_core_dev_item_ops = { 2065 .release = target_core_dev_release, 2066 .show_attribute = target_core_dev_show, 2067 .store_attribute = target_core_dev_store, 2068 }; 2069 2070 static struct config_item_type target_core_dev_cit = { 2071 .ct_item_ops = &target_core_dev_item_ops, 2072 .ct_attrs = lio_core_dev_attrs, 2073 .ct_owner = THIS_MODULE, 2074 }; 2075 2076 /* End functions for struct config_item_type target_core_dev_cit */ 2077 2078 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 2079 2080 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp); 2081 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \ 2082 static struct target_core_alua_lu_gp_attribute \ 2083 target_core_alua_lu_gp_##_name = \ 2084 __CONFIGFS_EATTR(_name, _mode, \ 2085 target_core_alua_lu_gp_show_attr_##_name, \ 2086 target_core_alua_lu_gp_store_attr_##_name); 2087 2088 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \ 2089 static struct target_core_alua_lu_gp_attribute \ 2090 target_core_alua_lu_gp_##_name = \ 2091 __CONFIGFS_EATTR_RO(_name, \ 2092 target_core_alua_lu_gp_show_attr_##_name); 2093 2094 /* 2095 * lu_gp_id 2096 */ 2097 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id( 2098 struct t10_alua_lu_gp *lu_gp, 2099 char *page) 2100 { 2101 if (!(lu_gp->lu_gp_valid_id)) 2102 return 0; 2103 2104 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2105 } 2106 2107 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id( 2108 struct t10_alua_lu_gp *lu_gp, 2109 const char *page, 2110 size_t count) 2111 { 2112 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2113 unsigned long lu_gp_id; 2114 int ret; 2115 2116 ret = strict_strtoul(page, 0, &lu_gp_id); 2117 if (ret < 0) { 2118 printk(KERN_ERR "strict_strtoul() returned %d for" 2119 " lu_gp_id\n", ret); 2120 return -EINVAL; 2121 } 2122 if (lu_gp_id > 0x0000ffff) { 2123 printk(KERN_ERR "ALUA lu_gp_id: %lu exceeds maximum:" 2124 " 0x0000ffff\n", lu_gp_id); 2125 return -EINVAL; 2126 } 2127 2128 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2129 if (ret < 0) 2130 return -EINVAL; 2131 2132 printk(KERN_INFO "Target_Core_ConfigFS: Set ALUA Logical Unit" 2133 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2134 config_item_name(&alua_lu_gp_cg->cg_item), 2135 lu_gp->lu_gp_id); 2136 2137 return count; 2138 } 2139 2140 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR); 2141 2142 /* 2143 * members 2144 */ 2145 static ssize_t target_core_alua_lu_gp_show_attr_members( 2146 struct t10_alua_lu_gp *lu_gp, 2147 char *page) 2148 { 2149 struct se_device *dev; 2150 struct se_hba *hba; 2151 struct se_subsystem_dev *su_dev; 2152 struct t10_alua_lu_gp_member *lu_gp_mem; 2153 ssize_t len = 0, cur_len; 2154 unsigned char buf[LU_GROUP_NAME_BUF]; 2155 2156 memset(buf, 0, LU_GROUP_NAME_BUF); 2157 2158 spin_lock(&lu_gp->lu_gp_lock); 2159 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2160 dev = lu_gp_mem->lu_gp_mem_dev; 2161 su_dev = dev->se_sub_dev; 2162 hba = su_dev->se_dev_hba; 2163 2164 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 2165 config_item_name(&hba->hba_group.cg_item), 2166 config_item_name(&su_dev->se_dev_group.cg_item)); 2167 cur_len++; /* Extra byte for NULL terminator */ 2168 2169 if ((cur_len + len) > PAGE_SIZE) { 2170 printk(KERN_WARNING "Ran out of lu_gp_show_attr" 2171 "_members buffer\n"); 2172 break; 2173 } 2174 memcpy(page+len, buf, cur_len); 2175 len += cur_len; 2176 } 2177 spin_unlock(&lu_gp->lu_gp_lock); 2178 2179 return len; 2180 } 2181 2182 SE_DEV_ALUA_LU_ATTR_RO(members); 2183 2184 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group); 2185 2186 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2187 &target_core_alua_lu_gp_lu_gp_id.attr, 2188 &target_core_alua_lu_gp_members.attr, 2189 NULL, 2190 }; 2191 2192 static void target_core_alua_lu_gp_release(struct config_item *item) 2193 { 2194 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2195 struct t10_alua_lu_gp, lu_gp_group); 2196 2197 core_alua_free_lu_gp(lu_gp); 2198 } 2199 2200 static struct configfs_item_operations target_core_alua_lu_gp_ops = { 2201 .release = target_core_alua_lu_gp_release, 2202 .show_attribute = target_core_alua_lu_gp_attr_show, 2203 .store_attribute = target_core_alua_lu_gp_attr_store, 2204 }; 2205 2206 static struct config_item_type target_core_alua_lu_gp_cit = { 2207 .ct_item_ops = &target_core_alua_lu_gp_ops, 2208 .ct_attrs = target_core_alua_lu_gp_attrs, 2209 .ct_owner = THIS_MODULE, 2210 }; 2211 2212 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2213 2214 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2215 2216 static struct config_group *target_core_alua_create_lu_gp( 2217 struct config_group *group, 2218 const char *name) 2219 { 2220 struct t10_alua_lu_gp *lu_gp; 2221 struct config_group *alua_lu_gp_cg = NULL; 2222 struct config_item *alua_lu_gp_ci = NULL; 2223 2224 lu_gp = core_alua_allocate_lu_gp(name, 0); 2225 if (IS_ERR(lu_gp)) 2226 return NULL; 2227 2228 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2229 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2230 2231 config_group_init_type_name(alua_lu_gp_cg, name, 2232 &target_core_alua_lu_gp_cit); 2233 2234 printk(KERN_INFO "Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2235 " Group: core/alua/lu_gps/%s\n", 2236 config_item_name(alua_lu_gp_ci)); 2237 2238 return alua_lu_gp_cg; 2239 2240 } 2241 2242 static void target_core_alua_drop_lu_gp( 2243 struct config_group *group, 2244 struct config_item *item) 2245 { 2246 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2247 struct t10_alua_lu_gp, lu_gp_group); 2248 2249 printk(KERN_INFO "Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2250 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2251 config_item_name(item), lu_gp->lu_gp_id); 2252 /* 2253 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 2254 * -> target_core_alua_lu_gp_release() 2255 */ 2256 config_item_put(item); 2257 } 2258 2259 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2260 .make_group = &target_core_alua_create_lu_gp, 2261 .drop_item = &target_core_alua_drop_lu_gp, 2262 }; 2263 2264 static struct config_item_type target_core_alua_lu_gps_cit = { 2265 .ct_item_ops = NULL, 2266 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2267 .ct_owner = THIS_MODULE, 2268 }; 2269 2270 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2271 2272 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2273 2274 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp); 2275 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \ 2276 static struct target_core_alua_tg_pt_gp_attribute \ 2277 target_core_alua_tg_pt_gp_##_name = \ 2278 __CONFIGFS_EATTR(_name, _mode, \ 2279 target_core_alua_tg_pt_gp_show_attr_##_name, \ 2280 target_core_alua_tg_pt_gp_store_attr_##_name); 2281 2282 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \ 2283 static struct target_core_alua_tg_pt_gp_attribute \ 2284 target_core_alua_tg_pt_gp_##_name = \ 2285 __CONFIGFS_EATTR_RO(_name, \ 2286 target_core_alua_tg_pt_gp_show_attr_##_name); 2287 2288 /* 2289 * alua_access_state 2290 */ 2291 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state( 2292 struct t10_alua_tg_pt_gp *tg_pt_gp, 2293 char *page) 2294 { 2295 return sprintf(page, "%d\n", 2296 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state)); 2297 } 2298 2299 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state( 2300 struct t10_alua_tg_pt_gp *tg_pt_gp, 2301 const char *page, 2302 size_t count) 2303 { 2304 struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev; 2305 unsigned long tmp; 2306 int new_state, ret; 2307 2308 if (!(tg_pt_gp->tg_pt_gp_valid_id)) { 2309 printk(KERN_ERR "Unable to do implict ALUA on non valid" 2310 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id); 2311 return -EINVAL; 2312 } 2313 2314 ret = strict_strtoul(page, 0, &tmp); 2315 if (ret < 0) { 2316 printk("Unable to extract new ALUA access state from" 2317 " %s\n", page); 2318 return -EINVAL; 2319 } 2320 new_state = (int)tmp; 2321 2322 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) { 2323 printk(KERN_ERR "Unable to process implict configfs ALUA" 2324 " transition while TPGS_IMPLICT_ALUA is diabled\n"); 2325 return -EINVAL; 2326 } 2327 2328 ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr, 2329 NULL, NULL, new_state, 0); 2330 return (!ret) ? count : -EINVAL; 2331 } 2332 2333 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR); 2334 2335 /* 2336 * alua_access_status 2337 */ 2338 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status( 2339 struct t10_alua_tg_pt_gp *tg_pt_gp, 2340 char *page) 2341 { 2342 return sprintf(page, "%s\n", 2343 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2344 } 2345 2346 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status( 2347 struct t10_alua_tg_pt_gp *tg_pt_gp, 2348 const char *page, 2349 size_t count) 2350 { 2351 unsigned long tmp; 2352 int new_status, ret; 2353 2354 if (!(tg_pt_gp->tg_pt_gp_valid_id)) { 2355 printk(KERN_ERR "Unable to do set ALUA access status on non" 2356 " valid tg_pt_gp ID: %hu\n", 2357 tg_pt_gp->tg_pt_gp_valid_id); 2358 return -EINVAL; 2359 } 2360 2361 ret = strict_strtoul(page, 0, &tmp); 2362 if (ret < 0) { 2363 printk(KERN_ERR "Unable to extract new ALUA access status" 2364 " from %s\n", page); 2365 return -EINVAL; 2366 } 2367 new_status = (int)tmp; 2368 2369 if ((new_status != ALUA_STATUS_NONE) && 2370 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) && 2371 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) { 2372 printk(KERN_ERR "Illegal ALUA access status: 0x%02x\n", 2373 new_status); 2374 return -EINVAL; 2375 } 2376 2377 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2378 return count; 2379 } 2380 2381 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR); 2382 2383 /* 2384 * alua_access_type 2385 */ 2386 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type( 2387 struct t10_alua_tg_pt_gp *tg_pt_gp, 2388 char *page) 2389 { 2390 return core_alua_show_access_type(tg_pt_gp, page); 2391 } 2392 2393 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type( 2394 struct t10_alua_tg_pt_gp *tg_pt_gp, 2395 const char *page, 2396 size_t count) 2397 { 2398 return core_alua_store_access_type(tg_pt_gp, page, count); 2399 } 2400 2401 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR); 2402 2403 /* 2404 * alua_write_metadata 2405 */ 2406 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata( 2407 struct t10_alua_tg_pt_gp *tg_pt_gp, 2408 char *page) 2409 { 2410 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata); 2411 } 2412 2413 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata( 2414 struct t10_alua_tg_pt_gp *tg_pt_gp, 2415 const char *page, 2416 size_t count) 2417 { 2418 unsigned long tmp; 2419 int ret; 2420 2421 ret = strict_strtoul(page, 0, &tmp); 2422 if (ret < 0) { 2423 printk(KERN_ERR "Unable to extract alua_write_metadata\n"); 2424 return -EINVAL; 2425 } 2426 2427 if ((tmp != 0) && (tmp != 1)) { 2428 printk(KERN_ERR "Illegal value for alua_write_metadata:" 2429 " %lu\n", tmp); 2430 return -EINVAL; 2431 } 2432 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 2433 2434 return count; 2435 } 2436 2437 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR); 2438 2439 2440 2441 /* 2442 * nonop_delay_msecs 2443 */ 2444 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs( 2445 struct t10_alua_tg_pt_gp *tg_pt_gp, 2446 char *page) 2447 { 2448 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page); 2449 2450 } 2451 2452 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs( 2453 struct t10_alua_tg_pt_gp *tg_pt_gp, 2454 const char *page, 2455 size_t count) 2456 { 2457 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count); 2458 } 2459 2460 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR); 2461 2462 /* 2463 * trans_delay_msecs 2464 */ 2465 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs( 2466 struct t10_alua_tg_pt_gp *tg_pt_gp, 2467 char *page) 2468 { 2469 return core_alua_show_trans_delay_msecs(tg_pt_gp, page); 2470 } 2471 2472 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs( 2473 struct t10_alua_tg_pt_gp *tg_pt_gp, 2474 const char *page, 2475 size_t count) 2476 { 2477 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count); 2478 } 2479 2480 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR); 2481 2482 /* 2483 * preferred 2484 */ 2485 2486 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred( 2487 struct t10_alua_tg_pt_gp *tg_pt_gp, 2488 char *page) 2489 { 2490 return core_alua_show_preferred_bit(tg_pt_gp, page); 2491 } 2492 2493 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred( 2494 struct t10_alua_tg_pt_gp *tg_pt_gp, 2495 const char *page, 2496 size_t count) 2497 { 2498 return core_alua_store_preferred_bit(tg_pt_gp, page, count); 2499 } 2500 2501 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR); 2502 2503 /* 2504 * tg_pt_gp_id 2505 */ 2506 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id( 2507 struct t10_alua_tg_pt_gp *tg_pt_gp, 2508 char *page) 2509 { 2510 if (!(tg_pt_gp->tg_pt_gp_valid_id)) 2511 return 0; 2512 2513 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 2514 } 2515 2516 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id( 2517 struct t10_alua_tg_pt_gp *tg_pt_gp, 2518 const char *page, 2519 size_t count) 2520 { 2521 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2522 unsigned long tg_pt_gp_id; 2523 int ret; 2524 2525 ret = strict_strtoul(page, 0, &tg_pt_gp_id); 2526 if (ret < 0) { 2527 printk(KERN_ERR "strict_strtoul() returned %d for" 2528 " tg_pt_gp_id\n", ret); 2529 return -EINVAL; 2530 } 2531 if (tg_pt_gp_id > 0x0000ffff) { 2532 printk(KERN_ERR "ALUA tg_pt_gp_id: %lu exceeds maximum:" 2533 " 0x0000ffff\n", tg_pt_gp_id); 2534 return -EINVAL; 2535 } 2536 2537 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 2538 if (ret < 0) 2539 return -EINVAL; 2540 2541 printk(KERN_INFO "Target_Core_ConfigFS: Set ALUA Target Port Group: " 2542 "core/alua/tg_pt_gps/%s to ID: %hu\n", 2543 config_item_name(&alua_tg_pt_gp_cg->cg_item), 2544 tg_pt_gp->tg_pt_gp_id); 2545 2546 return count; 2547 } 2548 2549 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR); 2550 2551 /* 2552 * members 2553 */ 2554 static ssize_t target_core_alua_tg_pt_gp_show_attr_members( 2555 struct t10_alua_tg_pt_gp *tg_pt_gp, 2556 char *page) 2557 { 2558 struct se_port *port; 2559 struct se_portal_group *tpg; 2560 struct se_lun *lun; 2561 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; 2562 ssize_t len = 0, cur_len; 2563 unsigned char buf[TG_PT_GROUP_NAME_BUF]; 2564 2565 memset(buf, 0, TG_PT_GROUP_NAME_BUF); 2566 2567 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 2568 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list, 2569 tg_pt_gp_mem_list) { 2570 port = tg_pt_gp_mem->tg_pt; 2571 tpg = port->sep_tpg; 2572 lun = port->sep_lun; 2573 2574 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 2575 "/%s\n", TPG_TFO(tpg)->get_fabric_name(), 2576 TPG_TFO(tpg)->tpg_get_wwn(tpg), 2577 TPG_TFO(tpg)->tpg_get_tag(tpg), 2578 config_item_name(&lun->lun_group.cg_item)); 2579 cur_len++; /* Extra byte for NULL terminator */ 2580 2581 if ((cur_len + len) > PAGE_SIZE) { 2582 printk(KERN_WARNING "Ran out of lu_gp_show_attr" 2583 "_members buffer\n"); 2584 break; 2585 } 2586 memcpy(page+len, buf, cur_len); 2587 len += cur_len; 2588 } 2589 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 2590 2591 return len; 2592 } 2593 2594 SE_DEV_ALUA_TG_PT_ATTR_RO(members); 2595 2596 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp, 2597 tg_pt_gp_group); 2598 2599 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 2600 &target_core_alua_tg_pt_gp_alua_access_state.attr, 2601 &target_core_alua_tg_pt_gp_alua_access_status.attr, 2602 &target_core_alua_tg_pt_gp_alua_access_type.attr, 2603 &target_core_alua_tg_pt_gp_alua_write_metadata.attr, 2604 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr, 2605 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr, 2606 &target_core_alua_tg_pt_gp_preferred.attr, 2607 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr, 2608 &target_core_alua_tg_pt_gp_members.attr, 2609 NULL, 2610 }; 2611 2612 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 2613 { 2614 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2615 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2616 2617 core_alua_free_tg_pt_gp(tg_pt_gp); 2618 } 2619 2620 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 2621 .release = target_core_alua_tg_pt_gp_release, 2622 .show_attribute = target_core_alua_tg_pt_gp_attr_show, 2623 .store_attribute = target_core_alua_tg_pt_gp_attr_store, 2624 }; 2625 2626 static struct config_item_type target_core_alua_tg_pt_gp_cit = { 2627 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 2628 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 2629 .ct_owner = THIS_MODULE, 2630 }; 2631 2632 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2633 2634 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */ 2635 2636 static struct config_group *target_core_alua_create_tg_pt_gp( 2637 struct config_group *group, 2638 const char *name) 2639 { 2640 struct t10_alua *alua = container_of(group, struct t10_alua, 2641 alua_tg_pt_gps_group); 2642 struct t10_alua_tg_pt_gp *tg_pt_gp; 2643 struct se_subsystem_dev *su_dev = alua->t10_sub_dev; 2644 struct config_group *alua_tg_pt_gp_cg = NULL; 2645 struct config_item *alua_tg_pt_gp_ci = NULL; 2646 2647 tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0); 2648 if (!(tg_pt_gp)) 2649 return NULL; 2650 2651 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2652 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 2653 2654 config_group_init_type_name(alua_tg_pt_gp_cg, name, 2655 &target_core_alua_tg_pt_gp_cit); 2656 2657 printk(KERN_INFO "Target_Core_ConfigFS: Allocated ALUA Target Port" 2658 " Group: alua/tg_pt_gps/%s\n", 2659 config_item_name(alua_tg_pt_gp_ci)); 2660 2661 return alua_tg_pt_gp_cg; 2662 } 2663 2664 static void target_core_alua_drop_tg_pt_gp( 2665 struct config_group *group, 2666 struct config_item *item) 2667 { 2668 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2669 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2670 2671 printk(KERN_INFO "Target_Core_ConfigFS: Releasing ALUA Target Port" 2672 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 2673 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 2674 /* 2675 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 2676 * -> target_core_alua_tg_pt_gp_release(). 2677 */ 2678 config_item_put(item); 2679 } 2680 2681 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 2682 .make_group = &target_core_alua_create_tg_pt_gp, 2683 .drop_item = &target_core_alua_drop_tg_pt_gp, 2684 }; 2685 2686 static struct config_item_type target_core_alua_tg_pt_gps_cit = { 2687 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops, 2688 .ct_owner = THIS_MODULE, 2689 }; 2690 2691 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */ 2692 2693 /* Start functions for struct config_item_type target_core_alua_cit */ 2694 2695 /* 2696 * target_core_alua_cit is a ConfigFS group that lives under 2697 * /sys/kernel/config/target/core/alua. There are default groups 2698 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 2699 * target_core_alua_cit in target_core_init_configfs() below. 2700 */ 2701 static struct config_item_type target_core_alua_cit = { 2702 .ct_item_ops = NULL, 2703 .ct_attrs = NULL, 2704 .ct_owner = THIS_MODULE, 2705 }; 2706 2707 /* End functions for struct config_item_type target_core_alua_cit */ 2708 2709 /* Start functions for struct config_item_type target_core_stat_cit */ 2710 2711 static struct config_group *target_core_stat_mkdir( 2712 struct config_group *group, 2713 const char *name) 2714 { 2715 return ERR_PTR(-ENOSYS); 2716 } 2717 2718 static void target_core_stat_rmdir( 2719 struct config_group *group, 2720 struct config_item *item) 2721 { 2722 return; 2723 } 2724 2725 static struct configfs_group_operations target_core_stat_group_ops = { 2726 .make_group = &target_core_stat_mkdir, 2727 .drop_item = &target_core_stat_rmdir, 2728 }; 2729 2730 static struct config_item_type target_core_stat_cit = { 2731 .ct_group_ops = &target_core_stat_group_ops, 2732 .ct_owner = THIS_MODULE, 2733 }; 2734 2735 /* End functions for struct config_item_type target_core_stat_cit */ 2736 2737 /* Start functions for struct config_item_type target_core_hba_cit */ 2738 2739 static struct config_group *target_core_make_subdev( 2740 struct config_group *group, 2741 const char *name) 2742 { 2743 struct t10_alua_tg_pt_gp *tg_pt_gp; 2744 struct se_subsystem_dev *se_dev; 2745 struct se_subsystem_api *t; 2746 struct config_item *hba_ci = &group->cg_item; 2747 struct se_hba *hba = item_to_hba(hba_ci); 2748 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL; 2749 struct config_group *dev_stat_grp = NULL; 2750 int errno = -ENOMEM, ret; 2751 2752 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 2753 if (ret) 2754 return ERR_PTR(ret); 2755 /* 2756 * Locate the struct se_subsystem_api from parent's struct se_hba. 2757 */ 2758 t = hba->transport; 2759 2760 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL); 2761 if (!se_dev) { 2762 printk(KERN_ERR "Unable to allocate memory for" 2763 " struct se_subsystem_dev\n"); 2764 goto unlock; 2765 } 2766 INIT_LIST_HEAD(&se_dev->g_se_dev_list); 2767 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list); 2768 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock); 2769 INIT_LIST_HEAD(&se_dev->t10_reservation.registration_list); 2770 INIT_LIST_HEAD(&se_dev->t10_reservation.aptpl_reg_list); 2771 spin_lock_init(&se_dev->t10_reservation.registration_lock); 2772 spin_lock_init(&se_dev->t10_reservation.aptpl_reg_lock); 2773 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list); 2774 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock); 2775 spin_lock_init(&se_dev->se_dev_lock); 2776 se_dev->t10_reservation.pr_aptpl_buf_len = PR_APTPL_BUF_LEN; 2777 se_dev->t10_wwn.t10_sub_dev = se_dev; 2778 se_dev->t10_alua.t10_sub_dev = se_dev; 2779 se_dev->se_dev_attrib.da_sub_dev = se_dev; 2780 2781 se_dev->se_dev_hba = hba; 2782 dev_cg = &se_dev->se_dev_group; 2783 2784 dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 7, 2785 GFP_KERNEL); 2786 if (!(dev_cg->default_groups)) 2787 goto out; 2788 /* 2789 * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr 2790 * for ->allocate_virtdevice() 2791 * 2792 * se_dev->se_dev_ptr will be set after ->create_virtdev() 2793 * has been called successfully in the next level up in the 2794 * configfs tree for device object's struct config_group. 2795 */ 2796 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name); 2797 if (!(se_dev->se_dev_su_ptr)) { 2798 printk(KERN_ERR "Unable to locate subsystem dependent pointer" 2799 " from allocate_virtdevice()\n"); 2800 goto out; 2801 } 2802 spin_lock(&se_global->g_device_lock); 2803 list_add_tail(&se_dev->g_se_dev_list, &se_global->g_se_dev_list); 2804 spin_unlock(&se_global->g_device_lock); 2805 2806 config_group_init_type_name(&se_dev->se_dev_group, name, 2807 &target_core_dev_cit); 2808 config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib", 2809 &target_core_dev_attrib_cit); 2810 config_group_init_type_name(&se_dev->se_dev_pr_group, "pr", 2811 &target_core_dev_pr_cit); 2812 config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn", 2813 &target_core_dev_wwn_cit); 2814 config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group, 2815 "alua", &target_core_alua_tg_pt_gps_cit); 2816 config_group_init_type_name(&se_dev->dev_stat_grps.stat_group, 2817 "statistics", &target_core_stat_cit); 2818 2819 dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group; 2820 dev_cg->default_groups[1] = &se_dev->se_dev_pr_group; 2821 dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group; 2822 dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group; 2823 dev_cg->default_groups[4] = &se_dev->dev_stat_grps.stat_group; 2824 dev_cg->default_groups[5] = NULL; 2825 /* 2826 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 2827 */ 2828 tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1); 2829 if (!(tg_pt_gp)) 2830 goto out; 2831 2832 tg_pt_gp_cg = &T10_ALUA(se_dev)->alua_tg_pt_gps_group; 2833 tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, 2834 GFP_KERNEL); 2835 if (!(tg_pt_gp_cg->default_groups)) { 2836 printk(KERN_ERR "Unable to allocate tg_pt_gp_cg->" 2837 "default_groups\n"); 2838 goto out; 2839 } 2840 2841 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 2842 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 2843 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group; 2844 tg_pt_gp_cg->default_groups[1] = NULL; 2845 T10_ALUA(se_dev)->default_tg_pt_gp = tg_pt_gp; 2846 /* 2847 * Add core/$HBA/$DEV/statistics/ default groups 2848 */ 2849 dev_stat_grp = &DEV_STAT_GRP(se_dev)->stat_group; 2850 dev_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 4, 2851 GFP_KERNEL); 2852 if (!dev_stat_grp->default_groups) { 2853 printk(KERN_ERR "Unable to allocate dev_stat_grp->default_groups\n"); 2854 goto out; 2855 } 2856 target_stat_setup_dev_default_groups(se_dev); 2857 2858 printk(KERN_INFO "Target_Core_ConfigFS: Allocated struct se_subsystem_dev:" 2859 " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr); 2860 2861 mutex_unlock(&hba->hba_access_mutex); 2862 return &se_dev->se_dev_group; 2863 out: 2864 if (T10_ALUA(se_dev)->default_tg_pt_gp) { 2865 core_alua_free_tg_pt_gp(T10_ALUA(se_dev)->default_tg_pt_gp); 2866 T10_ALUA(se_dev)->default_tg_pt_gp = NULL; 2867 } 2868 if (dev_stat_grp) 2869 kfree(dev_stat_grp->default_groups); 2870 if (tg_pt_gp_cg) 2871 kfree(tg_pt_gp_cg->default_groups); 2872 if (dev_cg) 2873 kfree(dev_cg->default_groups); 2874 if (se_dev->se_dev_su_ptr) 2875 t->free_device(se_dev->se_dev_su_ptr); 2876 kfree(se_dev); 2877 unlock: 2878 mutex_unlock(&hba->hba_access_mutex); 2879 return ERR_PTR(errno); 2880 } 2881 2882 static void target_core_drop_subdev( 2883 struct config_group *group, 2884 struct config_item *item) 2885 { 2886 struct se_subsystem_dev *se_dev = container_of(to_config_group(item), 2887 struct se_subsystem_dev, se_dev_group); 2888 struct se_hba *hba; 2889 struct se_subsystem_api *t; 2890 struct config_item *df_item; 2891 struct config_group *dev_cg, *tg_pt_gp_cg, *dev_stat_grp; 2892 int i; 2893 2894 hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item); 2895 2896 mutex_lock(&hba->hba_access_mutex); 2897 t = hba->transport; 2898 2899 spin_lock(&se_global->g_device_lock); 2900 list_del(&se_dev->g_se_dev_list); 2901 spin_unlock(&se_global->g_device_lock); 2902 2903 dev_stat_grp = &DEV_STAT_GRP(se_dev)->stat_group; 2904 for (i = 0; dev_stat_grp->default_groups[i]; i++) { 2905 df_item = &dev_stat_grp->default_groups[i]->cg_item; 2906 dev_stat_grp->default_groups[i] = NULL; 2907 config_item_put(df_item); 2908 } 2909 kfree(dev_stat_grp->default_groups); 2910 2911 tg_pt_gp_cg = &T10_ALUA(se_dev)->alua_tg_pt_gps_group; 2912 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) { 2913 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item; 2914 tg_pt_gp_cg->default_groups[i] = NULL; 2915 config_item_put(df_item); 2916 } 2917 kfree(tg_pt_gp_cg->default_groups); 2918 /* 2919 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 2920 * directly from target_core_alua_tg_pt_gp_release(). 2921 */ 2922 T10_ALUA(se_dev)->default_tg_pt_gp = NULL; 2923 2924 dev_cg = &se_dev->se_dev_group; 2925 for (i = 0; dev_cg->default_groups[i]; i++) { 2926 df_item = &dev_cg->default_groups[i]->cg_item; 2927 dev_cg->default_groups[i] = NULL; 2928 config_item_put(df_item); 2929 } 2930 /* 2931 * The releasing of se_dev and associated se_dev->se_dev_ptr is done 2932 * from target_core_dev_item_ops->release() ->target_core_dev_release(). 2933 */ 2934 config_item_put(item); 2935 mutex_unlock(&hba->hba_access_mutex); 2936 } 2937 2938 static struct configfs_group_operations target_core_hba_group_ops = { 2939 .make_group = target_core_make_subdev, 2940 .drop_item = target_core_drop_subdev, 2941 }; 2942 2943 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba); 2944 #define SE_HBA_ATTR(_name, _mode) \ 2945 static struct target_core_hba_attribute \ 2946 target_core_hba_##_name = \ 2947 __CONFIGFS_EATTR(_name, _mode, \ 2948 target_core_hba_show_attr_##_name, \ 2949 target_core_hba_store_attr_##_name); 2950 2951 #define SE_HBA_ATTR_RO(_name) \ 2952 static struct target_core_hba_attribute \ 2953 target_core_hba_##_name = \ 2954 __CONFIGFS_EATTR_RO(_name, \ 2955 target_core_hba_show_attr_##_name); 2956 2957 static ssize_t target_core_hba_show_attr_hba_info( 2958 struct se_hba *hba, 2959 char *page) 2960 { 2961 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 2962 hba->hba_id, hba->transport->name, 2963 TARGET_CORE_CONFIGFS_VERSION); 2964 } 2965 2966 SE_HBA_ATTR_RO(hba_info); 2967 2968 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba, 2969 char *page) 2970 { 2971 int hba_mode = 0; 2972 2973 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 2974 hba_mode = 1; 2975 2976 return sprintf(page, "%d\n", hba_mode); 2977 } 2978 2979 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba, 2980 const char *page, size_t count) 2981 { 2982 struct se_subsystem_api *transport = hba->transport; 2983 unsigned long mode_flag; 2984 int ret; 2985 2986 if (transport->pmode_enable_hba == NULL) 2987 return -EINVAL; 2988 2989 ret = strict_strtoul(page, 0, &mode_flag); 2990 if (ret < 0) { 2991 printk(KERN_ERR "Unable to extract hba mode flag: %d\n", ret); 2992 return -EINVAL; 2993 } 2994 2995 spin_lock(&hba->device_lock); 2996 if (!(list_empty(&hba->hba_dev_list))) { 2997 printk(KERN_ERR "Unable to set hba_mode with active devices\n"); 2998 spin_unlock(&hba->device_lock); 2999 return -EINVAL; 3000 } 3001 spin_unlock(&hba->device_lock); 3002 3003 ret = transport->pmode_enable_hba(hba, mode_flag); 3004 if (ret < 0) 3005 return -EINVAL; 3006 if (ret > 0) 3007 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 3008 else if (ret == 0) 3009 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 3010 3011 return count; 3012 } 3013 3014 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR); 3015 3016 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group); 3017 3018 static void target_core_hba_release(struct config_item *item) 3019 { 3020 struct se_hba *hba = container_of(to_config_group(item), 3021 struct se_hba, hba_group); 3022 core_delete_hba(hba); 3023 } 3024 3025 static struct configfs_attribute *target_core_hba_attrs[] = { 3026 &target_core_hba_hba_info.attr, 3027 &target_core_hba_hba_mode.attr, 3028 NULL, 3029 }; 3030 3031 static struct configfs_item_operations target_core_hba_item_ops = { 3032 .release = target_core_hba_release, 3033 .show_attribute = target_core_hba_attr_show, 3034 .store_attribute = target_core_hba_attr_store, 3035 }; 3036 3037 static struct config_item_type target_core_hba_cit = { 3038 .ct_item_ops = &target_core_hba_item_ops, 3039 .ct_group_ops = &target_core_hba_group_ops, 3040 .ct_attrs = target_core_hba_attrs, 3041 .ct_owner = THIS_MODULE, 3042 }; 3043 3044 static struct config_group *target_core_call_addhbatotarget( 3045 struct config_group *group, 3046 const char *name) 3047 { 3048 char *se_plugin_str, *str, *str2; 3049 struct se_hba *hba; 3050 char buf[TARGET_CORE_NAME_MAX_LEN]; 3051 unsigned long plugin_dep_id = 0; 3052 int ret; 3053 3054 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN); 3055 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 3056 printk(KERN_ERR "Passed *name strlen(): %d exceeds" 3057 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 3058 TARGET_CORE_NAME_MAX_LEN); 3059 return ERR_PTR(-ENAMETOOLONG); 3060 } 3061 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 3062 3063 str = strstr(buf, "_"); 3064 if (!(str)) { 3065 printk(KERN_ERR "Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 3066 return ERR_PTR(-EINVAL); 3067 } 3068 se_plugin_str = buf; 3069 /* 3070 * Special case for subsystem plugins that have "_" in their names. 3071 * Namely rd_direct and rd_mcp.. 3072 */ 3073 str2 = strstr(str+1, "_"); 3074 if ((str2)) { 3075 *str2 = '\0'; /* Terminate for *se_plugin_str */ 3076 str2++; /* Skip to start of plugin dependent ID */ 3077 str = str2; 3078 } else { 3079 *str = '\0'; /* Terminate for *se_plugin_str */ 3080 str++; /* Skip to start of plugin dependent ID */ 3081 } 3082 3083 ret = strict_strtoul(str, 0, &plugin_dep_id); 3084 if (ret < 0) { 3085 printk(KERN_ERR "strict_strtoul() returned %d for" 3086 " plugin_dep_id\n", ret); 3087 return ERR_PTR(-EINVAL); 3088 } 3089 /* 3090 * Load up TCM subsystem plugins if they have not already been loaded. 3091 */ 3092 if (transport_subsystem_check_init() < 0) 3093 return ERR_PTR(-EINVAL); 3094 3095 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 3096 if (IS_ERR(hba)) 3097 return ERR_CAST(hba); 3098 3099 config_group_init_type_name(&hba->hba_group, name, 3100 &target_core_hba_cit); 3101 3102 return &hba->hba_group; 3103 } 3104 3105 static void target_core_call_delhbafromtarget( 3106 struct config_group *group, 3107 struct config_item *item) 3108 { 3109 /* 3110 * core_delete_hba() is called from target_core_hba_item_ops->release() 3111 * -> target_core_hba_release() 3112 */ 3113 config_item_put(item); 3114 } 3115 3116 static struct configfs_group_operations target_core_group_ops = { 3117 .make_group = target_core_call_addhbatotarget, 3118 .drop_item = target_core_call_delhbafromtarget, 3119 }; 3120 3121 static struct config_item_type target_core_cit = { 3122 .ct_item_ops = NULL, 3123 .ct_group_ops = &target_core_group_ops, 3124 .ct_attrs = NULL, 3125 .ct_owner = THIS_MODULE, 3126 }; 3127 3128 /* Stop functions for struct config_item_type target_core_hba_cit */ 3129 3130 static int __init target_core_init_configfs(void) 3131 { 3132 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL; 3133 struct config_group *lu_gp_cg = NULL; 3134 struct configfs_subsystem *subsys; 3135 struct t10_alua_lu_gp *lu_gp; 3136 int ret; 3137 3138 printk(KERN_INFO "TARGET_CORE[0]: Loading Generic Kernel Storage" 3139 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3140 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3141 3142 subsys = target_core_subsystem[0]; 3143 config_group_init(&subsys->su_group); 3144 mutex_init(&subsys->su_mutex); 3145 3146 INIT_LIST_HEAD(&g_tf_list); 3147 mutex_init(&g_tf_lock); 3148 init_scsi_index_table(); 3149 ret = init_se_global(); 3150 if (ret < 0) 3151 return -1; 3152 /* 3153 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3154 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3155 */ 3156 target_cg = &subsys->su_group; 3157 target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, 3158 GFP_KERNEL); 3159 if (!(target_cg->default_groups)) { 3160 printk(KERN_ERR "Unable to allocate target_cg->default_groups\n"); 3161 goto out_global; 3162 } 3163 3164 config_group_init_type_name(&se_global->target_core_hbagroup, 3165 "core", &target_core_cit); 3166 target_cg->default_groups[0] = &se_global->target_core_hbagroup; 3167 target_cg->default_groups[1] = NULL; 3168 /* 3169 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3170 */ 3171 hba_cg = &se_global->target_core_hbagroup; 3172 hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, 3173 GFP_KERNEL); 3174 if (!(hba_cg->default_groups)) { 3175 printk(KERN_ERR "Unable to allocate hba_cg->default_groups\n"); 3176 goto out_global; 3177 } 3178 config_group_init_type_name(&se_global->alua_group, 3179 "alua", &target_core_alua_cit); 3180 hba_cg->default_groups[0] = &se_global->alua_group; 3181 hba_cg->default_groups[1] = NULL; 3182 /* 3183 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3184 * groups under /sys/kernel/config/target/core/alua/ 3185 */ 3186 alua_cg = &se_global->alua_group; 3187 alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, 3188 GFP_KERNEL); 3189 if (!(alua_cg->default_groups)) { 3190 printk(KERN_ERR "Unable to allocate alua_cg->default_groups\n"); 3191 goto out_global; 3192 } 3193 3194 config_group_init_type_name(&se_global->alua_lu_gps_group, 3195 "lu_gps", &target_core_alua_lu_gps_cit); 3196 alua_cg->default_groups[0] = &se_global->alua_lu_gps_group; 3197 alua_cg->default_groups[1] = NULL; 3198 /* 3199 * Add core/alua/lu_gps/default_lu_gp 3200 */ 3201 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3202 if (IS_ERR(lu_gp)) 3203 goto out_global; 3204 3205 lu_gp_cg = &se_global->alua_lu_gps_group; 3206 lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, 3207 GFP_KERNEL); 3208 if (!(lu_gp_cg->default_groups)) { 3209 printk(KERN_ERR "Unable to allocate lu_gp_cg->default_groups\n"); 3210 goto out_global; 3211 } 3212 3213 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3214 &target_core_alua_lu_gp_cit); 3215 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group; 3216 lu_gp_cg->default_groups[1] = NULL; 3217 se_global->default_lu_gp = lu_gp; 3218 /* 3219 * Register the target_core_mod subsystem with configfs. 3220 */ 3221 ret = configfs_register_subsystem(subsys); 3222 if (ret < 0) { 3223 printk(KERN_ERR "Error %d while registering subsystem %s\n", 3224 ret, subsys->su_group.cg_item.ci_namebuf); 3225 goto out_global; 3226 } 3227 printk(KERN_INFO "TARGET_CORE[0]: Initialized ConfigFS Fabric" 3228 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s" 3229 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3230 /* 3231 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3232 */ 3233 ret = rd_module_init(); 3234 if (ret < 0) 3235 goto out; 3236 3237 if (core_dev_setup_virtual_lun0() < 0) 3238 goto out; 3239 3240 return 0; 3241 3242 out: 3243 configfs_unregister_subsystem(subsys); 3244 core_dev_release_virtual_lun0(); 3245 rd_module_exit(); 3246 out_global: 3247 if (se_global->default_lu_gp) { 3248 core_alua_free_lu_gp(se_global->default_lu_gp); 3249 se_global->default_lu_gp = NULL; 3250 } 3251 if (lu_gp_cg) 3252 kfree(lu_gp_cg->default_groups); 3253 if (alua_cg) 3254 kfree(alua_cg->default_groups); 3255 if (hba_cg) 3256 kfree(hba_cg->default_groups); 3257 kfree(target_cg->default_groups); 3258 release_se_global(); 3259 return -1; 3260 } 3261 3262 static void __exit target_core_exit_configfs(void) 3263 { 3264 struct configfs_subsystem *subsys; 3265 struct config_group *hba_cg, *alua_cg, *lu_gp_cg; 3266 struct config_item *item; 3267 int i; 3268 3269 se_global->in_shutdown = 1; 3270 subsys = target_core_subsystem[0]; 3271 3272 lu_gp_cg = &se_global->alua_lu_gps_group; 3273 for (i = 0; lu_gp_cg->default_groups[i]; i++) { 3274 item = &lu_gp_cg->default_groups[i]->cg_item; 3275 lu_gp_cg->default_groups[i] = NULL; 3276 config_item_put(item); 3277 } 3278 kfree(lu_gp_cg->default_groups); 3279 lu_gp_cg->default_groups = NULL; 3280 3281 alua_cg = &se_global->alua_group; 3282 for (i = 0; alua_cg->default_groups[i]; i++) { 3283 item = &alua_cg->default_groups[i]->cg_item; 3284 alua_cg->default_groups[i] = NULL; 3285 config_item_put(item); 3286 } 3287 kfree(alua_cg->default_groups); 3288 alua_cg->default_groups = NULL; 3289 3290 hba_cg = &se_global->target_core_hbagroup; 3291 for (i = 0; hba_cg->default_groups[i]; i++) { 3292 item = &hba_cg->default_groups[i]->cg_item; 3293 hba_cg->default_groups[i] = NULL; 3294 config_item_put(item); 3295 } 3296 kfree(hba_cg->default_groups); 3297 hba_cg->default_groups = NULL; 3298 /* 3299 * We expect subsys->su_group.default_groups to be released 3300 * by configfs subsystem provider logic.. 3301 */ 3302 configfs_unregister_subsystem(subsys); 3303 kfree(subsys->su_group.default_groups); 3304 3305 core_alua_free_lu_gp(se_global->default_lu_gp); 3306 se_global->default_lu_gp = NULL; 3307 3308 printk(KERN_INFO "TARGET_CORE[0]: Released ConfigFS Fabric" 3309 " Infrastructure\n"); 3310 3311 core_dev_release_virtual_lun0(); 3312 rd_module_exit(); 3313 release_se_global(); 3314 3315 return; 3316 } 3317 3318 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3319 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3320 MODULE_LICENSE("GPL"); 3321 3322 module_init(target_core_init_configfs); 3323 module_exit(target_core_exit_configfs); 3324