1 /******************************************************************************* 2 * Filename: target_core_configfs.c 3 * 4 * This file contains ConfigFS logic for the Generic Target Engine project. 5 * 6 * (c) Copyright 2008-2012 RisingTide Systems LLC. 7 * 8 * Nicholas A. Bellinger <nab@kernel.org> 9 * 10 * based on configfs Copyright (C) 2005 Oracle. All rights reserved. 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License as published by 14 * the Free Software Foundation; either version 2 of the License, or 15 * (at your option) any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 ****************************************************************************/ 22 23 #include <linux/module.h> 24 #include <linux/moduleparam.h> 25 #include <generated/utsrelease.h> 26 #include <linux/utsname.h> 27 #include <linux/init.h> 28 #include <linux/fs.h> 29 #include <linux/namei.h> 30 #include <linux/slab.h> 31 #include <linux/types.h> 32 #include <linux/delay.h> 33 #include <linux/unistd.h> 34 #include <linux/string.h> 35 #include <linux/parser.h> 36 #include <linux/syscalls.h> 37 #include <linux/configfs.h> 38 #include <linux/spinlock.h> 39 40 #include <target/target_core_base.h> 41 #include <target/target_core_backend.h> 42 #include <target/target_core_fabric.h> 43 #include <target/target_core_fabric_configfs.h> 44 #include <target/target_core_configfs.h> 45 #include <target/configfs_macros.h> 46 47 #include "target_core_internal.h" 48 #include "target_core_alua.h" 49 #include "target_core_pr.h" 50 #include "target_core_rd.h" 51 52 extern struct t10_alua_lu_gp *default_lu_gp; 53 54 static LIST_HEAD(g_tf_list); 55 static DEFINE_MUTEX(g_tf_lock); 56 57 struct target_core_configfs_attribute { 58 struct configfs_attribute attr; 59 ssize_t (*show)(void *, char *); 60 ssize_t (*store)(void *, const char *, size_t); 61 }; 62 63 static struct config_group target_core_hbagroup; 64 static struct config_group alua_group; 65 static struct config_group alua_lu_gps_group; 66 67 static inline struct se_hba * 68 item_to_hba(struct config_item *item) 69 { 70 return container_of(to_config_group(item), struct se_hba, hba_group); 71 } 72 73 /* 74 * Attributes for /sys/kernel/config/target/ 75 */ 76 static ssize_t target_core_attr_show(struct config_item *item, 77 struct configfs_attribute *attr, 78 char *page) 79 { 80 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s" 81 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION, 82 utsname()->sysname, utsname()->machine); 83 } 84 85 static struct configfs_item_operations target_core_fabric_item_ops = { 86 .show_attribute = target_core_attr_show, 87 }; 88 89 static struct configfs_attribute target_core_item_attr_version = { 90 .ca_owner = THIS_MODULE, 91 .ca_name = "version", 92 .ca_mode = S_IRUGO, 93 }; 94 95 static struct target_fabric_configfs *target_core_get_fabric( 96 const char *name) 97 { 98 struct target_fabric_configfs *tf; 99 100 if (!name) 101 return NULL; 102 103 mutex_lock(&g_tf_lock); 104 list_for_each_entry(tf, &g_tf_list, tf_list) { 105 if (!strcmp(tf->tf_name, name)) { 106 atomic_inc(&tf->tf_access_cnt); 107 mutex_unlock(&g_tf_lock); 108 return tf; 109 } 110 } 111 mutex_unlock(&g_tf_lock); 112 113 return NULL; 114 } 115 116 /* 117 * Called from struct target_core_group_ops->make_group() 118 */ 119 static struct config_group *target_core_register_fabric( 120 struct config_group *group, 121 const char *name) 122 { 123 struct target_fabric_configfs *tf; 124 int ret; 125 126 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:" 127 " %s\n", group, name); 128 /* 129 * Below are some hardcoded request_module() calls to automatically 130 * local fabric modules when the following is called: 131 * 132 * mkdir -p /sys/kernel/config/target/$MODULE_NAME 133 * 134 * Note that this does not limit which TCM fabric module can be 135 * registered, but simply provids auto loading logic for modules with 136 * mkdir(2) system calls with known TCM fabric modules. 137 */ 138 if (!strncmp(name, "iscsi", 5)) { 139 /* 140 * Automatically load the LIO Target fabric module when the 141 * following is called: 142 * 143 * mkdir -p $CONFIGFS/target/iscsi 144 */ 145 ret = request_module("iscsi_target_mod"); 146 if (ret < 0) { 147 pr_err("request_module() failed for" 148 " iscsi_target_mod.ko: %d\n", ret); 149 return ERR_PTR(-EINVAL); 150 } 151 } else if (!strncmp(name, "loopback", 8)) { 152 /* 153 * Automatically load the tcm_loop fabric module when the 154 * following is called: 155 * 156 * mkdir -p $CONFIGFS/target/loopback 157 */ 158 ret = request_module("tcm_loop"); 159 if (ret < 0) { 160 pr_err("request_module() failed for" 161 " tcm_loop.ko: %d\n", ret); 162 return ERR_PTR(-EINVAL); 163 } 164 } 165 166 tf = target_core_get_fabric(name); 167 if (!tf) { 168 pr_err("target_core_get_fabric() failed for %s\n", 169 name); 170 return ERR_PTR(-EINVAL); 171 } 172 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:" 173 " %s\n", tf->tf_name); 174 /* 175 * On a successful target_core_get_fabric() look, the returned 176 * struct target_fabric_configfs *tf will contain a usage reference. 177 */ 178 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n", 179 &TF_CIT_TMPL(tf)->tfc_wwn_cit); 180 181 tf->tf_group.default_groups = tf->tf_default_groups; 182 tf->tf_group.default_groups[0] = &tf->tf_disc_group; 183 tf->tf_group.default_groups[1] = NULL; 184 185 config_group_init_type_name(&tf->tf_group, name, 186 &TF_CIT_TMPL(tf)->tfc_wwn_cit); 187 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth", 188 &TF_CIT_TMPL(tf)->tfc_discovery_cit); 189 190 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:" 191 " %s\n", tf->tf_group.cg_item.ci_name); 192 /* 193 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item() 194 */ 195 tf->tf_ops.tf_subsys = tf->tf_subsys; 196 tf->tf_fabric = &tf->tf_group.cg_item; 197 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric" 198 " for %s\n", name); 199 200 return &tf->tf_group; 201 } 202 203 /* 204 * Called from struct target_core_group_ops->drop_item() 205 */ 206 static void target_core_deregister_fabric( 207 struct config_group *group, 208 struct config_item *item) 209 { 210 struct target_fabric_configfs *tf = container_of( 211 to_config_group(item), struct target_fabric_configfs, tf_group); 212 struct config_group *tf_group; 213 struct config_item *df_item; 214 int i; 215 216 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in" 217 " tf list\n", config_item_name(item)); 218 219 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:" 220 " %s\n", tf->tf_name); 221 atomic_dec(&tf->tf_access_cnt); 222 223 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing" 224 " tf->tf_fabric for %s\n", tf->tf_name); 225 tf->tf_fabric = NULL; 226 227 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci" 228 " %s\n", config_item_name(item)); 229 230 tf_group = &tf->tf_group; 231 for (i = 0; tf_group->default_groups[i]; i++) { 232 df_item = &tf_group->default_groups[i]->cg_item; 233 tf_group->default_groups[i] = NULL; 234 config_item_put(df_item); 235 } 236 config_item_put(item); 237 } 238 239 static struct configfs_group_operations target_core_fabric_group_ops = { 240 .make_group = &target_core_register_fabric, 241 .drop_item = &target_core_deregister_fabric, 242 }; 243 244 /* 245 * All item attributes appearing in /sys/kernel/target/ appear here. 246 */ 247 static struct configfs_attribute *target_core_fabric_item_attrs[] = { 248 &target_core_item_attr_version, 249 NULL, 250 }; 251 252 /* 253 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/ 254 */ 255 static struct config_item_type target_core_fabrics_item = { 256 .ct_item_ops = &target_core_fabric_item_ops, 257 .ct_group_ops = &target_core_fabric_group_ops, 258 .ct_attrs = target_core_fabric_item_attrs, 259 .ct_owner = THIS_MODULE, 260 }; 261 262 static struct configfs_subsystem target_core_fabrics = { 263 .su_group = { 264 .cg_item = { 265 .ci_namebuf = "target", 266 .ci_type = &target_core_fabrics_item, 267 }, 268 }, 269 }; 270 271 static struct configfs_subsystem *target_core_subsystem[] = { 272 &target_core_fabrics, 273 NULL, 274 }; 275 276 /*############################################################################## 277 // Start functions called by external Target Fabrics Modules 278 //############################################################################*/ 279 280 /* 281 * First function called by fabric modules to: 282 * 283 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer. 284 * 2) Add struct target_fabric_configfs to g_tf_list 285 * 3) Return struct target_fabric_configfs to fabric module to be passed 286 * into target_fabric_configfs_register(). 287 */ 288 struct target_fabric_configfs *target_fabric_configfs_init( 289 struct module *fabric_mod, 290 const char *name) 291 { 292 struct target_fabric_configfs *tf; 293 294 if (!(name)) { 295 pr_err("Unable to locate passed fabric name\n"); 296 return ERR_PTR(-EINVAL); 297 } 298 if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) { 299 pr_err("Passed name: %s exceeds TARGET_FABRIC" 300 "_NAME_SIZE\n", name); 301 return ERR_PTR(-EINVAL); 302 } 303 304 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL); 305 if (!tf) 306 return ERR_PTR(-ENOMEM); 307 308 INIT_LIST_HEAD(&tf->tf_list); 309 atomic_set(&tf->tf_access_cnt, 0); 310 /* 311 * Setup the default generic struct config_item_type's (cits) in 312 * struct target_fabric_configfs->tf_cit_tmpl 313 */ 314 tf->tf_module = fabric_mod; 315 target_fabric_setup_cits(tf); 316 317 tf->tf_subsys = target_core_subsystem[0]; 318 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name); 319 320 mutex_lock(&g_tf_lock); 321 list_add_tail(&tf->tf_list, &g_tf_list); 322 mutex_unlock(&g_tf_lock); 323 324 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>" 325 ">>>>>>>>>>>>>>\n"); 326 pr_debug("Initialized struct target_fabric_configfs: %p for" 327 " %s\n", tf, tf->tf_name); 328 return tf; 329 } 330 EXPORT_SYMBOL(target_fabric_configfs_init); 331 332 /* 333 * Called by fabric plugins after FAILED target_fabric_configfs_register() call. 334 */ 335 void target_fabric_configfs_free( 336 struct target_fabric_configfs *tf) 337 { 338 mutex_lock(&g_tf_lock); 339 list_del(&tf->tf_list); 340 mutex_unlock(&g_tf_lock); 341 342 kfree(tf); 343 } 344 EXPORT_SYMBOL(target_fabric_configfs_free); 345 346 /* 347 * Perform a sanity check of the passed tf->tf_ops before completing 348 * TCM fabric module registration. 349 */ 350 static int target_fabric_tf_ops_check( 351 struct target_fabric_configfs *tf) 352 { 353 struct target_core_fabric_ops *tfo = &tf->tf_ops; 354 355 if (!tfo->get_fabric_name) { 356 pr_err("Missing tfo->get_fabric_name()\n"); 357 return -EINVAL; 358 } 359 if (!tfo->get_fabric_proto_ident) { 360 pr_err("Missing tfo->get_fabric_proto_ident()\n"); 361 return -EINVAL; 362 } 363 if (!tfo->tpg_get_wwn) { 364 pr_err("Missing tfo->tpg_get_wwn()\n"); 365 return -EINVAL; 366 } 367 if (!tfo->tpg_get_tag) { 368 pr_err("Missing tfo->tpg_get_tag()\n"); 369 return -EINVAL; 370 } 371 if (!tfo->tpg_get_default_depth) { 372 pr_err("Missing tfo->tpg_get_default_depth()\n"); 373 return -EINVAL; 374 } 375 if (!tfo->tpg_get_pr_transport_id) { 376 pr_err("Missing tfo->tpg_get_pr_transport_id()\n"); 377 return -EINVAL; 378 } 379 if (!tfo->tpg_get_pr_transport_id_len) { 380 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n"); 381 return -EINVAL; 382 } 383 if (!tfo->tpg_check_demo_mode) { 384 pr_err("Missing tfo->tpg_check_demo_mode()\n"); 385 return -EINVAL; 386 } 387 if (!tfo->tpg_check_demo_mode_cache) { 388 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n"); 389 return -EINVAL; 390 } 391 if (!tfo->tpg_check_demo_mode_write_protect) { 392 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n"); 393 return -EINVAL; 394 } 395 if (!tfo->tpg_check_prod_mode_write_protect) { 396 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n"); 397 return -EINVAL; 398 } 399 if (!tfo->tpg_alloc_fabric_acl) { 400 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n"); 401 return -EINVAL; 402 } 403 if (!tfo->tpg_release_fabric_acl) { 404 pr_err("Missing tfo->tpg_release_fabric_acl()\n"); 405 return -EINVAL; 406 } 407 if (!tfo->tpg_get_inst_index) { 408 pr_err("Missing tfo->tpg_get_inst_index()\n"); 409 return -EINVAL; 410 } 411 if (!tfo->release_cmd) { 412 pr_err("Missing tfo->release_cmd()\n"); 413 return -EINVAL; 414 } 415 if (!tfo->shutdown_session) { 416 pr_err("Missing tfo->shutdown_session()\n"); 417 return -EINVAL; 418 } 419 if (!tfo->close_session) { 420 pr_err("Missing tfo->close_session()\n"); 421 return -EINVAL; 422 } 423 if (!tfo->sess_get_index) { 424 pr_err("Missing tfo->sess_get_index()\n"); 425 return -EINVAL; 426 } 427 if (!tfo->write_pending) { 428 pr_err("Missing tfo->write_pending()\n"); 429 return -EINVAL; 430 } 431 if (!tfo->write_pending_status) { 432 pr_err("Missing tfo->write_pending_status()\n"); 433 return -EINVAL; 434 } 435 if (!tfo->set_default_node_attributes) { 436 pr_err("Missing tfo->set_default_node_attributes()\n"); 437 return -EINVAL; 438 } 439 if (!tfo->get_task_tag) { 440 pr_err("Missing tfo->get_task_tag()\n"); 441 return -EINVAL; 442 } 443 if (!tfo->get_cmd_state) { 444 pr_err("Missing tfo->get_cmd_state()\n"); 445 return -EINVAL; 446 } 447 if (!tfo->queue_data_in) { 448 pr_err("Missing tfo->queue_data_in()\n"); 449 return -EINVAL; 450 } 451 if (!tfo->queue_status) { 452 pr_err("Missing tfo->queue_status()\n"); 453 return -EINVAL; 454 } 455 if (!tfo->queue_tm_rsp) { 456 pr_err("Missing tfo->queue_tm_rsp()\n"); 457 return -EINVAL; 458 } 459 /* 460 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn() 461 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in 462 * target_core_fabric_configfs.c WWN+TPG group context code. 463 */ 464 if (!tfo->fabric_make_wwn) { 465 pr_err("Missing tfo->fabric_make_wwn()\n"); 466 return -EINVAL; 467 } 468 if (!tfo->fabric_drop_wwn) { 469 pr_err("Missing tfo->fabric_drop_wwn()\n"); 470 return -EINVAL; 471 } 472 if (!tfo->fabric_make_tpg) { 473 pr_err("Missing tfo->fabric_make_tpg()\n"); 474 return -EINVAL; 475 } 476 if (!tfo->fabric_drop_tpg) { 477 pr_err("Missing tfo->fabric_drop_tpg()\n"); 478 return -EINVAL; 479 } 480 481 return 0; 482 } 483 484 /* 485 * Called 2nd from fabric module with returned parameter of 486 * struct target_fabric_configfs * from target_fabric_configfs_init(). 487 * 488 * Upon a successful registration, the new fabric's struct config_item is 489 * return. Also, a pointer to this struct is set in the passed 490 * struct target_fabric_configfs. 491 */ 492 int target_fabric_configfs_register( 493 struct target_fabric_configfs *tf) 494 { 495 int ret; 496 497 if (!tf) { 498 pr_err("Unable to locate target_fabric_configfs" 499 " pointer\n"); 500 return -EINVAL; 501 } 502 if (!tf->tf_subsys) { 503 pr_err("Unable to target struct config_subsystem" 504 " pointer\n"); 505 return -EINVAL; 506 } 507 ret = target_fabric_tf_ops_check(tf); 508 if (ret < 0) 509 return ret; 510 511 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>" 512 ">>>>>>>>>>\n"); 513 return 0; 514 } 515 EXPORT_SYMBOL(target_fabric_configfs_register); 516 517 void target_fabric_configfs_deregister( 518 struct target_fabric_configfs *tf) 519 { 520 struct configfs_subsystem *su; 521 522 if (!tf) { 523 pr_err("Unable to locate passed target_fabric_" 524 "configfs\n"); 525 return; 526 } 527 su = tf->tf_subsys; 528 if (!su) { 529 pr_err("Unable to locate passed tf->tf_subsys" 530 " pointer\n"); 531 return; 532 } 533 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>" 534 ">>>>>>>>>>>>\n"); 535 mutex_lock(&g_tf_lock); 536 if (atomic_read(&tf->tf_access_cnt)) { 537 mutex_unlock(&g_tf_lock); 538 pr_err("Non zero tf->tf_access_cnt for fabric %s\n", 539 tf->tf_name); 540 BUG(); 541 } 542 list_del(&tf->tf_list); 543 mutex_unlock(&g_tf_lock); 544 545 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:" 546 " %s\n", tf->tf_name); 547 tf->tf_module = NULL; 548 tf->tf_subsys = NULL; 549 kfree(tf); 550 551 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>" 552 ">>>>>\n"); 553 } 554 EXPORT_SYMBOL(target_fabric_configfs_deregister); 555 556 /*############################################################################## 557 // Stop functions called by external Target Fabrics Modules 558 //############################################################################*/ 559 560 /* Start functions for struct config_item_type target_core_dev_attrib_cit */ 561 562 #define DEF_DEV_ATTRIB_SHOW(_name) \ 563 static ssize_t target_core_dev_show_attr_##_name( \ 564 struct se_dev_attrib *da, \ 565 char *page) \ 566 { \ 567 return snprintf(page, PAGE_SIZE, "%u\n", \ 568 (u32)da->da_dev->dev_attrib._name); \ 569 } 570 571 #define DEF_DEV_ATTRIB_STORE(_name) \ 572 static ssize_t target_core_dev_store_attr_##_name( \ 573 struct se_dev_attrib *da, \ 574 const char *page, \ 575 size_t count) \ 576 { \ 577 unsigned long val; \ 578 int ret; \ 579 \ 580 ret = strict_strtoul(page, 0, &val); \ 581 if (ret < 0) { \ 582 pr_err("strict_strtoul() failed with" \ 583 " ret: %d\n", ret); \ 584 return -EINVAL; \ 585 } \ 586 ret = se_dev_set_##_name(da->da_dev, (u32)val); \ 587 \ 588 return (!ret) ? count : -EINVAL; \ 589 } 590 591 #define DEF_DEV_ATTRIB(_name) \ 592 DEF_DEV_ATTRIB_SHOW(_name); \ 593 DEF_DEV_ATTRIB_STORE(_name); 594 595 #define DEF_DEV_ATTRIB_RO(_name) \ 596 DEF_DEV_ATTRIB_SHOW(_name); 597 598 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib); 599 #define SE_DEV_ATTR(_name, _mode) \ 600 static struct target_core_dev_attrib_attribute \ 601 target_core_dev_attrib_##_name = \ 602 __CONFIGFS_EATTR(_name, _mode, \ 603 target_core_dev_show_attr_##_name, \ 604 target_core_dev_store_attr_##_name); 605 606 #define SE_DEV_ATTR_RO(_name); \ 607 static struct target_core_dev_attrib_attribute \ 608 target_core_dev_attrib_##_name = \ 609 __CONFIGFS_EATTR_RO(_name, \ 610 target_core_dev_show_attr_##_name); 611 612 DEF_DEV_ATTRIB(emulate_model_alias); 613 SE_DEV_ATTR(emulate_model_alias, S_IRUGO | S_IWUSR); 614 615 DEF_DEV_ATTRIB(emulate_dpo); 616 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR); 617 618 DEF_DEV_ATTRIB(emulate_fua_write); 619 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR); 620 621 DEF_DEV_ATTRIB(emulate_fua_read); 622 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR); 623 624 DEF_DEV_ATTRIB(emulate_write_cache); 625 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR); 626 627 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl); 628 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR); 629 630 DEF_DEV_ATTRIB(emulate_tas); 631 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR); 632 633 DEF_DEV_ATTRIB(emulate_tpu); 634 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR); 635 636 DEF_DEV_ATTRIB(emulate_tpws); 637 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR); 638 639 DEF_DEV_ATTRIB(enforce_pr_isids); 640 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR); 641 642 DEF_DEV_ATTRIB(is_nonrot); 643 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR); 644 645 DEF_DEV_ATTRIB(emulate_rest_reord); 646 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR); 647 648 DEF_DEV_ATTRIB_RO(hw_block_size); 649 SE_DEV_ATTR_RO(hw_block_size); 650 651 DEF_DEV_ATTRIB(block_size); 652 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR); 653 654 DEF_DEV_ATTRIB_RO(hw_max_sectors); 655 SE_DEV_ATTR_RO(hw_max_sectors); 656 657 DEF_DEV_ATTRIB(fabric_max_sectors); 658 SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR); 659 660 DEF_DEV_ATTRIB(optimal_sectors); 661 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR); 662 663 DEF_DEV_ATTRIB_RO(hw_queue_depth); 664 SE_DEV_ATTR_RO(hw_queue_depth); 665 666 DEF_DEV_ATTRIB(queue_depth); 667 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR); 668 669 DEF_DEV_ATTRIB(max_unmap_lba_count); 670 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR); 671 672 DEF_DEV_ATTRIB(max_unmap_block_desc_count); 673 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR); 674 675 DEF_DEV_ATTRIB(unmap_granularity); 676 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR); 677 678 DEF_DEV_ATTRIB(unmap_granularity_alignment); 679 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR); 680 681 DEF_DEV_ATTRIB(max_write_same_len); 682 SE_DEV_ATTR(max_write_same_len, S_IRUGO | S_IWUSR); 683 684 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group); 685 686 static struct configfs_attribute *target_core_dev_attrib_attrs[] = { 687 &target_core_dev_attrib_emulate_model_alias.attr, 688 &target_core_dev_attrib_emulate_dpo.attr, 689 &target_core_dev_attrib_emulate_fua_write.attr, 690 &target_core_dev_attrib_emulate_fua_read.attr, 691 &target_core_dev_attrib_emulate_write_cache.attr, 692 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr, 693 &target_core_dev_attrib_emulate_tas.attr, 694 &target_core_dev_attrib_emulate_tpu.attr, 695 &target_core_dev_attrib_emulate_tpws.attr, 696 &target_core_dev_attrib_enforce_pr_isids.attr, 697 &target_core_dev_attrib_is_nonrot.attr, 698 &target_core_dev_attrib_emulate_rest_reord.attr, 699 &target_core_dev_attrib_hw_block_size.attr, 700 &target_core_dev_attrib_block_size.attr, 701 &target_core_dev_attrib_hw_max_sectors.attr, 702 &target_core_dev_attrib_fabric_max_sectors.attr, 703 &target_core_dev_attrib_optimal_sectors.attr, 704 &target_core_dev_attrib_hw_queue_depth.attr, 705 &target_core_dev_attrib_queue_depth.attr, 706 &target_core_dev_attrib_max_unmap_lba_count.attr, 707 &target_core_dev_attrib_max_unmap_block_desc_count.attr, 708 &target_core_dev_attrib_unmap_granularity.attr, 709 &target_core_dev_attrib_unmap_granularity_alignment.attr, 710 &target_core_dev_attrib_max_write_same_len.attr, 711 NULL, 712 }; 713 714 static struct configfs_item_operations target_core_dev_attrib_ops = { 715 .show_attribute = target_core_dev_attrib_attr_show, 716 .store_attribute = target_core_dev_attrib_attr_store, 717 }; 718 719 static struct config_item_type target_core_dev_attrib_cit = { 720 .ct_item_ops = &target_core_dev_attrib_ops, 721 .ct_attrs = target_core_dev_attrib_attrs, 722 .ct_owner = THIS_MODULE, 723 }; 724 725 /* End functions for struct config_item_type target_core_dev_attrib_cit */ 726 727 /* Start functions for struct config_item_type target_core_dev_wwn_cit */ 728 729 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn); 730 #define SE_DEV_WWN_ATTR(_name, _mode) \ 731 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \ 732 __CONFIGFS_EATTR(_name, _mode, \ 733 target_core_dev_wwn_show_attr_##_name, \ 734 target_core_dev_wwn_store_attr_##_name); 735 736 #define SE_DEV_WWN_ATTR_RO(_name); \ 737 do { \ 738 static struct target_core_dev_wwn_attribute \ 739 target_core_dev_wwn_##_name = \ 740 __CONFIGFS_EATTR_RO(_name, \ 741 target_core_dev_wwn_show_attr_##_name); \ 742 } while (0); 743 744 /* 745 * VPD page 0x80 Unit serial 746 */ 747 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial( 748 struct t10_wwn *t10_wwn, 749 char *page) 750 { 751 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 752 &t10_wwn->unit_serial[0]); 753 } 754 755 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial( 756 struct t10_wwn *t10_wwn, 757 const char *page, 758 size_t count) 759 { 760 struct se_device *dev = t10_wwn->t10_dev; 761 unsigned char buf[INQUIRY_VPD_SERIAL_LEN]; 762 763 /* 764 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 765 * from the struct scsi_device level firmware, do not allow 766 * VPD Unit Serial to be emulated. 767 * 768 * Note this struct scsi_device could also be emulating VPD 769 * information from its drivers/scsi LLD. But for now we assume 770 * it is doing 'the right thing' wrt a world wide unique 771 * VPD Unit Serial Number that OS dependent multipath can depend on. 772 */ 773 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) { 774 pr_err("Underlying SCSI device firmware provided VPD" 775 " Unit Serial, ignoring request\n"); 776 return -EOPNOTSUPP; 777 } 778 779 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 780 pr_err("Emulated VPD Unit Serial exceeds" 781 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 782 return -EOVERFLOW; 783 } 784 /* 785 * Check to see if any active $FABRIC_MOD exports exist. If they 786 * do exist, fail here as changing this information on the fly 787 * (underneath the initiator side OS dependent multipath code) 788 * could cause negative effects. 789 */ 790 if (dev->export_count) { 791 pr_err("Unable to set VPD Unit Serial while" 792 " active %d $FABRIC_MOD exports exist\n", 793 dev->export_count); 794 return -EINVAL; 795 } 796 797 /* 798 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 799 * 800 * Also, strip any newline added from the userspace 801 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 802 */ 803 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN); 804 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 805 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 806 "%s", strstrip(buf)); 807 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL; 808 809 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 810 " %s\n", dev->t10_wwn.unit_serial); 811 812 return count; 813 } 814 815 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR); 816 817 /* 818 * VPD page 0x83 Protocol Identifier 819 */ 820 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier( 821 struct t10_wwn *t10_wwn, 822 char *page) 823 { 824 struct t10_vpd *vpd; 825 unsigned char buf[VPD_TMP_BUF_SIZE]; 826 ssize_t len = 0; 827 828 memset(buf, 0, VPD_TMP_BUF_SIZE); 829 830 spin_lock(&t10_wwn->t10_vpd_lock); 831 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 832 if (!vpd->protocol_identifier_set) 833 continue; 834 835 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 836 837 if (len + strlen(buf) >= PAGE_SIZE) 838 break; 839 840 len += sprintf(page+len, "%s", buf); 841 } 842 spin_unlock(&t10_wwn->t10_vpd_lock); 843 844 return len; 845 } 846 847 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier( 848 struct t10_wwn *t10_wwn, 849 const char *page, 850 size_t count) 851 { 852 return -ENOSYS; 853 } 854 855 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR); 856 857 /* 858 * Generic wrapper for dumping VPD identifiers by association. 859 */ 860 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 861 static ssize_t target_core_dev_wwn_show_attr_##_name( \ 862 struct t10_wwn *t10_wwn, \ 863 char *page) \ 864 { \ 865 struct t10_vpd *vpd; \ 866 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 867 ssize_t len = 0; \ 868 \ 869 spin_lock(&t10_wwn->t10_vpd_lock); \ 870 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 871 if (vpd->association != _assoc) \ 872 continue; \ 873 \ 874 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 875 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 876 if (len + strlen(buf) >= PAGE_SIZE) \ 877 break; \ 878 len += sprintf(page+len, "%s", buf); \ 879 \ 880 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 881 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 882 if (len + strlen(buf) >= PAGE_SIZE) \ 883 break; \ 884 len += sprintf(page+len, "%s", buf); \ 885 \ 886 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 887 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 888 if (len + strlen(buf) >= PAGE_SIZE) \ 889 break; \ 890 len += sprintf(page+len, "%s", buf); \ 891 } \ 892 spin_unlock(&t10_wwn->t10_vpd_lock); \ 893 \ 894 return len; \ 895 } 896 897 /* 898 * VPD page 0x83 Association: Logical Unit 899 */ 900 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 901 902 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit( 903 struct t10_wwn *t10_wwn, 904 const char *page, 905 size_t count) 906 { 907 return -ENOSYS; 908 } 909 910 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR); 911 912 /* 913 * VPD page 0x83 Association: Target Port 914 */ 915 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 916 917 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port( 918 struct t10_wwn *t10_wwn, 919 const char *page, 920 size_t count) 921 { 922 return -ENOSYS; 923 } 924 925 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR); 926 927 /* 928 * VPD page 0x83 Association: SCSI Target Device 929 */ 930 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 931 932 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device( 933 struct t10_wwn *t10_wwn, 934 const char *page, 935 size_t count) 936 { 937 return -ENOSYS; 938 } 939 940 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR); 941 942 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group); 943 944 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 945 &target_core_dev_wwn_vpd_unit_serial.attr, 946 &target_core_dev_wwn_vpd_protocol_identifier.attr, 947 &target_core_dev_wwn_vpd_assoc_logical_unit.attr, 948 &target_core_dev_wwn_vpd_assoc_target_port.attr, 949 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr, 950 NULL, 951 }; 952 953 static struct configfs_item_operations target_core_dev_wwn_ops = { 954 .show_attribute = target_core_dev_wwn_attr_show, 955 .store_attribute = target_core_dev_wwn_attr_store, 956 }; 957 958 static struct config_item_type target_core_dev_wwn_cit = { 959 .ct_item_ops = &target_core_dev_wwn_ops, 960 .ct_attrs = target_core_dev_wwn_attrs, 961 .ct_owner = THIS_MODULE, 962 }; 963 964 /* End functions for struct config_item_type target_core_dev_wwn_cit */ 965 966 /* Start functions for struct config_item_type target_core_dev_pr_cit */ 967 968 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device); 969 #define SE_DEV_PR_ATTR(_name, _mode) \ 970 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 971 __CONFIGFS_EATTR(_name, _mode, \ 972 target_core_dev_pr_show_attr_##_name, \ 973 target_core_dev_pr_store_attr_##_name); 974 975 #define SE_DEV_PR_ATTR_RO(_name); \ 976 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 977 __CONFIGFS_EATTR_RO(_name, \ 978 target_core_dev_pr_show_attr_##_name); 979 980 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev, 981 char *page) 982 { 983 struct se_node_acl *se_nacl; 984 struct t10_pr_registration *pr_reg; 985 char i_buf[PR_REG_ISID_ID_LEN]; 986 987 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 988 989 pr_reg = dev->dev_pr_res_holder; 990 if (!pr_reg) 991 return sprintf(page, "No SPC-3 Reservation holder\n"); 992 993 se_nacl = pr_reg->pr_reg_nacl; 994 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 995 996 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", 997 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 998 se_nacl->initiatorname, i_buf); 999 } 1000 1001 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, 1002 char *page) 1003 { 1004 struct se_node_acl *se_nacl; 1005 ssize_t len; 1006 1007 se_nacl = dev->dev_reserved_node_acl; 1008 if (se_nacl) { 1009 len = sprintf(page, 1010 "SPC-2 Reservation: %s Initiator: %s\n", 1011 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 1012 se_nacl->initiatorname); 1013 } else { 1014 len = sprintf(page, "No SPC-2 Reservation holder\n"); 1015 } 1016 return len; 1017 } 1018 1019 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev, 1020 char *page) 1021 { 1022 int ret; 1023 1024 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 1025 return sprintf(page, "Passthrough\n"); 1026 1027 spin_lock(&dev->dev_reservation_lock); 1028 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1029 ret = target_core_dev_pr_show_spc2_res(dev, page); 1030 else 1031 ret = target_core_dev_pr_show_spc3_res(dev, page); 1032 spin_unlock(&dev->dev_reservation_lock); 1033 return ret; 1034 } 1035 1036 SE_DEV_PR_ATTR_RO(res_holder); 1037 1038 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts( 1039 struct se_device *dev, char *page) 1040 { 1041 ssize_t len = 0; 1042 1043 spin_lock(&dev->dev_reservation_lock); 1044 if (!dev->dev_pr_res_holder) { 1045 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1046 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { 1047 len = sprintf(page, "SPC-3 Reservation: All Target" 1048 " Ports registration\n"); 1049 } else { 1050 len = sprintf(page, "SPC-3 Reservation: Single" 1051 " Target Port registration\n"); 1052 } 1053 1054 spin_unlock(&dev->dev_reservation_lock); 1055 return len; 1056 } 1057 1058 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts); 1059 1060 static ssize_t target_core_dev_pr_show_attr_res_pr_generation( 1061 struct se_device *dev, char *page) 1062 { 1063 return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation); 1064 } 1065 1066 SE_DEV_PR_ATTR_RO(res_pr_generation); 1067 1068 /* 1069 * res_pr_holder_tg_port 1070 */ 1071 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port( 1072 struct se_device *dev, char *page) 1073 { 1074 struct se_node_acl *se_nacl; 1075 struct se_lun *lun; 1076 struct se_portal_group *se_tpg; 1077 struct t10_pr_registration *pr_reg; 1078 struct target_core_fabric_ops *tfo; 1079 ssize_t len = 0; 1080 1081 spin_lock(&dev->dev_reservation_lock); 1082 pr_reg = dev->dev_pr_res_holder; 1083 if (!pr_reg) { 1084 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1085 goto out_unlock; 1086 } 1087 1088 se_nacl = pr_reg->pr_reg_nacl; 1089 se_tpg = se_nacl->se_tpg; 1090 lun = pr_reg->pr_reg_tg_pt_lun; 1091 tfo = se_tpg->se_tpg_tfo; 1092 1093 len += sprintf(page+len, "SPC-3 Reservation: %s" 1094 " Target Node Endpoint: %s\n", tfo->get_fabric_name(), 1095 tfo->tpg_get_wwn(se_tpg)); 1096 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1097 " Identifier Tag: %hu %s Portal Group Tag: %hu" 1098 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi, 1099 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg), 1100 tfo->get_fabric_name(), lun->unpacked_lun); 1101 1102 out_unlock: 1103 spin_unlock(&dev->dev_reservation_lock); 1104 return len; 1105 } 1106 1107 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port); 1108 1109 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts( 1110 struct se_device *dev, char *page) 1111 { 1112 struct target_core_fabric_ops *tfo; 1113 struct t10_pr_registration *pr_reg; 1114 unsigned char buf[384]; 1115 char i_buf[PR_REG_ISID_ID_LEN]; 1116 ssize_t len = 0; 1117 int reg_count = 0; 1118 1119 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1120 1121 spin_lock(&dev->t10_pr.registration_lock); 1122 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1123 pr_reg_list) { 1124 1125 memset(buf, 0, 384); 1126 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1127 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1128 core_pr_dump_initiator_port(pr_reg, i_buf, 1129 PR_REG_ISID_ID_LEN); 1130 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1131 tfo->get_fabric_name(), 1132 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, 1133 pr_reg->pr_res_generation); 1134 1135 if (len + strlen(buf) >= PAGE_SIZE) 1136 break; 1137 1138 len += sprintf(page+len, "%s", buf); 1139 reg_count++; 1140 } 1141 spin_unlock(&dev->t10_pr.registration_lock); 1142 1143 if (!reg_count) 1144 len += sprintf(page+len, "None\n"); 1145 1146 return len; 1147 } 1148 1149 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts); 1150 1151 static ssize_t target_core_dev_pr_show_attr_res_pr_type( 1152 struct se_device *dev, char *page) 1153 { 1154 struct t10_pr_registration *pr_reg; 1155 ssize_t len = 0; 1156 1157 spin_lock(&dev->dev_reservation_lock); 1158 pr_reg = dev->dev_pr_res_holder; 1159 if (pr_reg) { 1160 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1161 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 1162 } else { 1163 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1164 } 1165 1166 spin_unlock(&dev->dev_reservation_lock); 1167 return len; 1168 } 1169 1170 SE_DEV_PR_ATTR_RO(res_pr_type); 1171 1172 static ssize_t target_core_dev_pr_show_attr_res_type( 1173 struct se_device *dev, char *page) 1174 { 1175 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 1176 return sprintf(page, "SPC_PASSTHROUGH\n"); 1177 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1178 return sprintf(page, "SPC2_RESERVATIONS\n"); 1179 else 1180 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 1181 } 1182 1183 SE_DEV_PR_ATTR_RO(res_type); 1184 1185 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active( 1186 struct se_device *dev, char *page) 1187 { 1188 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 1189 return 0; 1190 1191 return sprintf(page, "APTPL Bit Status: %s\n", 1192 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 1193 } 1194 1195 SE_DEV_PR_ATTR_RO(res_aptpl_active); 1196 1197 /* 1198 * res_aptpl_metadata 1199 */ 1200 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata( 1201 struct se_device *dev, char *page) 1202 { 1203 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 1204 return 0; 1205 1206 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 1207 } 1208 1209 enum { 1210 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 1211 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 1212 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 1213 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 1214 }; 1215 1216 static match_table_t tokens = { 1217 {Opt_initiator_fabric, "initiator_fabric=%s"}, 1218 {Opt_initiator_node, "initiator_node=%s"}, 1219 {Opt_initiator_sid, "initiator_sid=%s"}, 1220 {Opt_sa_res_key, "sa_res_key=%s"}, 1221 {Opt_res_holder, "res_holder=%d"}, 1222 {Opt_res_type, "res_type=%d"}, 1223 {Opt_res_scope, "res_scope=%d"}, 1224 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 1225 {Opt_mapped_lun, "mapped_lun=%d"}, 1226 {Opt_target_fabric, "target_fabric=%s"}, 1227 {Opt_target_node, "target_node=%s"}, 1228 {Opt_tpgt, "tpgt=%d"}, 1229 {Opt_port_rtpi, "port_rtpi=%d"}, 1230 {Opt_target_lun, "target_lun=%d"}, 1231 {Opt_err, NULL} 1232 }; 1233 1234 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata( 1235 struct se_device *dev, 1236 const char *page, 1237 size_t count) 1238 { 1239 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 1240 unsigned char *t_fabric = NULL, *t_port = NULL; 1241 char *orig, *ptr, *arg_p, *opts; 1242 substring_t args[MAX_OPT_ARGS]; 1243 unsigned long long tmp_ll; 1244 u64 sa_res_key = 0; 1245 u32 mapped_lun = 0, target_lun = 0; 1246 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 1247 u16 port_rpti = 0, tpgt = 0; 1248 u8 type = 0, scope; 1249 1250 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) 1251 return 0; 1252 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1253 return 0; 1254 1255 if (dev->export_count) { 1256 pr_debug("Unable to process APTPL metadata while" 1257 " active fabric exports exist\n"); 1258 return -EINVAL; 1259 } 1260 1261 opts = kstrdup(page, GFP_KERNEL); 1262 if (!opts) 1263 return -ENOMEM; 1264 1265 orig = opts; 1266 while ((ptr = strsep(&opts, ",\n")) != NULL) { 1267 if (!*ptr) 1268 continue; 1269 1270 token = match_token(ptr, tokens, args); 1271 switch (token) { 1272 case Opt_initiator_fabric: 1273 i_fabric = match_strdup(&args[0]); 1274 if (!i_fabric) { 1275 ret = -ENOMEM; 1276 goto out; 1277 } 1278 break; 1279 case Opt_initiator_node: 1280 i_port = match_strdup(&args[0]); 1281 if (!i_port) { 1282 ret = -ENOMEM; 1283 goto out; 1284 } 1285 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 1286 pr_err("APTPL metadata initiator_node=" 1287 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 1288 PR_APTPL_MAX_IPORT_LEN); 1289 ret = -EINVAL; 1290 break; 1291 } 1292 break; 1293 case Opt_initiator_sid: 1294 isid = match_strdup(&args[0]); 1295 if (!isid) { 1296 ret = -ENOMEM; 1297 goto out; 1298 } 1299 if (strlen(isid) >= PR_REG_ISID_LEN) { 1300 pr_err("APTPL metadata initiator_isid" 1301 "= exceeds PR_REG_ISID_LEN: %d\n", 1302 PR_REG_ISID_LEN); 1303 ret = -EINVAL; 1304 break; 1305 } 1306 break; 1307 case Opt_sa_res_key: 1308 arg_p = match_strdup(&args[0]); 1309 if (!arg_p) { 1310 ret = -ENOMEM; 1311 goto out; 1312 } 1313 ret = strict_strtoull(arg_p, 0, &tmp_ll); 1314 if (ret < 0) { 1315 pr_err("strict_strtoull() failed for" 1316 " sa_res_key=\n"); 1317 goto out; 1318 } 1319 sa_res_key = (u64)tmp_ll; 1320 break; 1321 /* 1322 * PR APTPL Metadata for Reservation 1323 */ 1324 case Opt_res_holder: 1325 match_int(args, &arg); 1326 res_holder = arg; 1327 break; 1328 case Opt_res_type: 1329 match_int(args, &arg); 1330 type = (u8)arg; 1331 break; 1332 case Opt_res_scope: 1333 match_int(args, &arg); 1334 scope = (u8)arg; 1335 break; 1336 case Opt_res_all_tg_pt: 1337 match_int(args, &arg); 1338 all_tg_pt = (int)arg; 1339 break; 1340 case Opt_mapped_lun: 1341 match_int(args, &arg); 1342 mapped_lun = (u32)arg; 1343 break; 1344 /* 1345 * PR APTPL Metadata for Target Port 1346 */ 1347 case Opt_target_fabric: 1348 t_fabric = match_strdup(&args[0]); 1349 if (!t_fabric) { 1350 ret = -ENOMEM; 1351 goto out; 1352 } 1353 break; 1354 case Opt_target_node: 1355 t_port = match_strdup(&args[0]); 1356 if (!t_port) { 1357 ret = -ENOMEM; 1358 goto out; 1359 } 1360 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 1361 pr_err("APTPL metadata target_node=" 1362 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 1363 PR_APTPL_MAX_TPORT_LEN); 1364 ret = -EINVAL; 1365 break; 1366 } 1367 break; 1368 case Opt_tpgt: 1369 match_int(args, &arg); 1370 tpgt = (u16)arg; 1371 break; 1372 case Opt_port_rtpi: 1373 match_int(args, &arg); 1374 port_rpti = (u16)arg; 1375 break; 1376 case Opt_target_lun: 1377 match_int(args, &arg); 1378 target_lun = (u32)arg; 1379 break; 1380 default: 1381 break; 1382 } 1383 } 1384 1385 if (!i_port || !t_port || !sa_res_key) { 1386 pr_err("Illegal parameters for APTPL registration\n"); 1387 ret = -EINVAL; 1388 goto out; 1389 } 1390 1391 if (res_holder && !(type)) { 1392 pr_err("Illegal PR type: 0x%02x for reservation" 1393 " holder\n", type); 1394 ret = -EINVAL; 1395 goto out; 1396 } 1397 1398 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, 1399 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 1400 res_holder, all_tg_pt, type); 1401 out: 1402 kfree(i_fabric); 1403 kfree(i_port); 1404 kfree(isid); 1405 kfree(t_fabric); 1406 kfree(t_port); 1407 kfree(orig); 1408 return (ret == 0) ? count : ret; 1409 } 1410 1411 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR); 1412 1413 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group); 1414 1415 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 1416 &target_core_dev_pr_res_holder.attr, 1417 &target_core_dev_pr_res_pr_all_tgt_pts.attr, 1418 &target_core_dev_pr_res_pr_generation.attr, 1419 &target_core_dev_pr_res_pr_holder_tg_port.attr, 1420 &target_core_dev_pr_res_pr_registered_i_pts.attr, 1421 &target_core_dev_pr_res_pr_type.attr, 1422 &target_core_dev_pr_res_type.attr, 1423 &target_core_dev_pr_res_aptpl_active.attr, 1424 &target_core_dev_pr_res_aptpl_metadata.attr, 1425 NULL, 1426 }; 1427 1428 static struct configfs_item_operations target_core_dev_pr_ops = { 1429 .show_attribute = target_core_dev_pr_attr_show, 1430 .store_attribute = target_core_dev_pr_attr_store, 1431 }; 1432 1433 static struct config_item_type target_core_dev_pr_cit = { 1434 .ct_item_ops = &target_core_dev_pr_ops, 1435 .ct_attrs = target_core_dev_pr_attrs, 1436 .ct_owner = THIS_MODULE, 1437 }; 1438 1439 /* End functions for struct config_item_type target_core_dev_pr_cit */ 1440 1441 /* Start functions for struct config_item_type target_core_dev_cit */ 1442 1443 static ssize_t target_core_show_dev_info(void *p, char *page) 1444 { 1445 struct se_device *dev = p; 1446 struct se_subsystem_api *t = dev->transport; 1447 int bl = 0; 1448 ssize_t read_bytes = 0; 1449 1450 transport_dump_dev_state(dev, page, &bl); 1451 read_bytes += bl; 1452 read_bytes += t->show_configfs_dev_params(dev, page+read_bytes); 1453 return read_bytes; 1454 } 1455 1456 static struct target_core_configfs_attribute target_core_attr_dev_info = { 1457 .attr = { .ca_owner = THIS_MODULE, 1458 .ca_name = "info", 1459 .ca_mode = S_IRUGO }, 1460 .show = target_core_show_dev_info, 1461 .store = NULL, 1462 }; 1463 1464 static ssize_t target_core_store_dev_control( 1465 void *p, 1466 const char *page, 1467 size_t count) 1468 { 1469 struct se_device *dev = p; 1470 struct se_subsystem_api *t = dev->transport; 1471 1472 return t->set_configfs_dev_params(dev, page, count); 1473 } 1474 1475 static struct target_core_configfs_attribute target_core_attr_dev_control = { 1476 .attr = { .ca_owner = THIS_MODULE, 1477 .ca_name = "control", 1478 .ca_mode = S_IWUSR }, 1479 .show = NULL, 1480 .store = target_core_store_dev_control, 1481 }; 1482 1483 static ssize_t target_core_show_dev_alias(void *p, char *page) 1484 { 1485 struct se_device *dev = p; 1486 1487 if (!(dev->dev_flags & DF_USING_ALIAS)) 1488 return 0; 1489 1490 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); 1491 } 1492 1493 static ssize_t target_core_store_dev_alias( 1494 void *p, 1495 const char *page, 1496 size_t count) 1497 { 1498 struct se_device *dev = p; 1499 struct se_hba *hba = dev->se_hba; 1500 ssize_t read_bytes; 1501 1502 if (count > (SE_DEV_ALIAS_LEN-1)) { 1503 pr_err("alias count: %d exceeds" 1504 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 1505 SE_DEV_ALIAS_LEN-1); 1506 return -EINVAL; 1507 } 1508 1509 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); 1510 if (!read_bytes) 1511 return -EINVAL; 1512 if (dev->dev_alias[read_bytes - 1] == '\n') 1513 dev->dev_alias[read_bytes - 1] = '\0'; 1514 1515 dev->dev_flags |= DF_USING_ALIAS; 1516 1517 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 1518 config_item_name(&hba->hba_group.cg_item), 1519 config_item_name(&dev->dev_group.cg_item), 1520 dev->dev_alias); 1521 1522 return read_bytes; 1523 } 1524 1525 static struct target_core_configfs_attribute target_core_attr_dev_alias = { 1526 .attr = { .ca_owner = THIS_MODULE, 1527 .ca_name = "alias", 1528 .ca_mode = S_IRUGO | S_IWUSR }, 1529 .show = target_core_show_dev_alias, 1530 .store = target_core_store_dev_alias, 1531 }; 1532 1533 static ssize_t target_core_show_dev_udev_path(void *p, char *page) 1534 { 1535 struct se_device *dev = p; 1536 1537 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) 1538 return 0; 1539 1540 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); 1541 } 1542 1543 static ssize_t target_core_store_dev_udev_path( 1544 void *p, 1545 const char *page, 1546 size_t count) 1547 { 1548 struct se_device *dev = p; 1549 struct se_hba *hba = dev->se_hba; 1550 ssize_t read_bytes; 1551 1552 if (count > (SE_UDEV_PATH_LEN-1)) { 1553 pr_err("udev_path count: %d exceeds" 1554 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 1555 SE_UDEV_PATH_LEN-1); 1556 return -EINVAL; 1557 } 1558 1559 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, 1560 "%s", page); 1561 if (!read_bytes) 1562 return -EINVAL; 1563 if (dev->udev_path[read_bytes - 1] == '\n') 1564 dev->udev_path[read_bytes - 1] = '\0'; 1565 1566 dev->dev_flags |= DF_USING_UDEV_PATH; 1567 1568 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 1569 config_item_name(&hba->hba_group.cg_item), 1570 config_item_name(&dev->dev_group.cg_item), 1571 dev->udev_path); 1572 1573 return read_bytes; 1574 } 1575 1576 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = { 1577 .attr = { .ca_owner = THIS_MODULE, 1578 .ca_name = "udev_path", 1579 .ca_mode = S_IRUGO | S_IWUSR }, 1580 .show = target_core_show_dev_udev_path, 1581 .store = target_core_store_dev_udev_path, 1582 }; 1583 1584 static ssize_t target_core_show_dev_enable(void *p, char *page) 1585 { 1586 struct se_device *dev = p; 1587 1588 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED)); 1589 } 1590 1591 static ssize_t target_core_store_dev_enable( 1592 void *p, 1593 const char *page, 1594 size_t count) 1595 { 1596 struct se_device *dev = p; 1597 char *ptr; 1598 int ret; 1599 1600 ptr = strstr(page, "1"); 1601 if (!ptr) { 1602 pr_err("For dev_enable ops, only valid value" 1603 " is \"1\"\n"); 1604 return -EINVAL; 1605 } 1606 1607 ret = target_configure_device(dev); 1608 if (ret) 1609 return ret; 1610 return count; 1611 } 1612 1613 static struct target_core_configfs_attribute target_core_attr_dev_enable = { 1614 .attr = { .ca_owner = THIS_MODULE, 1615 .ca_name = "enable", 1616 .ca_mode = S_IRUGO | S_IWUSR }, 1617 .show = target_core_show_dev_enable, 1618 .store = target_core_store_dev_enable, 1619 }; 1620 1621 static ssize_t target_core_show_alua_lu_gp(void *p, char *page) 1622 { 1623 struct se_device *dev = p; 1624 struct config_item *lu_ci; 1625 struct t10_alua_lu_gp *lu_gp; 1626 struct t10_alua_lu_gp_member *lu_gp_mem; 1627 ssize_t len = 0; 1628 1629 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1630 if (!lu_gp_mem) 1631 return 0; 1632 1633 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1634 lu_gp = lu_gp_mem->lu_gp; 1635 if (lu_gp) { 1636 lu_ci = &lu_gp->lu_gp_group.cg_item; 1637 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 1638 config_item_name(lu_ci), lu_gp->lu_gp_id); 1639 } 1640 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1641 1642 return len; 1643 } 1644 1645 static ssize_t target_core_store_alua_lu_gp( 1646 void *p, 1647 const char *page, 1648 size_t count) 1649 { 1650 struct se_device *dev = p; 1651 struct se_hba *hba = dev->se_hba; 1652 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 1653 struct t10_alua_lu_gp_member *lu_gp_mem; 1654 unsigned char buf[LU_GROUP_NAME_BUF]; 1655 int move = 0; 1656 1657 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1658 if (!lu_gp_mem) 1659 return 0; 1660 1661 if (count > LU_GROUP_NAME_BUF) { 1662 pr_err("ALUA LU Group Alias too large!\n"); 1663 return -EINVAL; 1664 } 1665 memset(buf, 0, LU_GROUP_NAME_BUF); 1666 memcpy(buf, page, count); 1667 /* 1668 * Any ALUA logical unit alias besides "NULL" means we will be 1669 * making a new group association. 1670 */ 1671 if (strcmp(strstrip(buf), "NULL")) { 1672 /* 1673 * core_alua_get_lu_gp_by_name() will increment reference to 1674 * struct t10_alua_lu_gp. This reference is released with 1675 * core_alua_get_lu_gp_by_name below(). 1676 */ 1677 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 1678 if (!lu_gp_new) 1679 return -ENODEV; 1680 } 1681 1682 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1683 lu_gp = lu_gp_mem->lu_gp; 1684 if (lu_gp) { 1685 /* 1686 * Clearing an existing lu_gp association, and replacing 1687 * with NULL 1688 */ 1689 if (!lu_gp_new) { 1690 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 1691 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 1692 " %hu\n", 1693 config_item_name(&hba->hba_group.cg_item), 1694 config_item_name(&dev->dev_group.cg_item), 1695 config_item_name(&lu_gp->lu_gp_group.cg_item), 1696 lu_gp->lu_gp_id); 1697 1698 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 1699 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1700 1701 return count; 1702 } 1703 /* 1704 * Removing existing association of lu_gp_mem with lu_gp 1705 */ 1706 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 1707 move = 1; 1708 } 1709 /* 1710 * Associate lu_gp_mem with lu_gp_new. 1711 */ 1712 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 1713 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1714 1715 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 1716 " core/alua/lu_gps/%s, ID: %hu\n", 1717 (move) ? "Moving" : "Adding", 1718 config_item_name(&hba->hba_group.cg_item), 1719 config_item_name(&dev->dev_group.cg_item), 1720 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 1721 lu_gp_new->lu_gp_id); 1722 1723 core_alua_put_lu_gp_from_name(lu_gp_new); 1724 return count; 1725 } 1726 1727 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = { 1728 .attr = { .ca_owner = THIS_MODULE, 1729 .ca_name = "alua_lu_gp", 1730 .ca_mode = S_IRUGO | S_IWUSR }, 1731 .show = target_core_show_alua_lu_gp, 1732 .store = target_core_store_alua_lu_gp, 1733 }; 1734 1735 static struct configfs_attribute *lio_core_dev_attrs[] = { 1736 &target_core_attr_dev_info.attr, 1737 &target_core_attr_dev_control.attr, 1738 &target_core_attr_dev_alias.attr, 1739 &target_core_attr_dev_udev_path.attr, 1740 &target_core_attr_dev_enable.attr, 1741 &target_core_attr_dev_alua_lu_gp.attr, 1742 NULL, 1743 }; 1744 1745 static void target_core_dev_release(struct config_item *item) 1746 { 1747 struct config_group *dev_cg = to_config_group(item); 1748 struct se_device *dev = 1749 container_of(dev_cg, struct se_device, dev_group); 1750 1751 kfree(dev_cg->default_groups); 1752 target_free_device(dev); 1753 } 1754 1755 static ssize_t target_core_dev_show(struct config_item *item, 1756 struct configfs_attribute *attr, 1757 char *page) 1758 { 1759 struct config_group *dev_cg = to_config_group(item); 1760 struct se_device *dev = 1761 container_of(dev_cg, struct se_device, dev_group); 1762 struct target_core_configfs_attribute *tc_attr = container_of( 1763 attr, struct target_core_configfs_attribute, attr); 1764 1765 if (!tc_attr->show) 1766 return -EINVAL; 1767 1768 return tc_attr->show(dev, page); 1769 } 1770 1771 static ssize_t target_core_dev_store(struct config_item *item, 1772 struct configfs_attribute *attr, 1773 const char *page, size_t count) 1774 { 1775 struct config_group *dev_cg = to_config_group(item); 1776 struct se_device *dev = 1777 container_of(dev_cg, struct se_device, dev_group); 1778 struct target_core_configfs_attribute *tc_attr = container_of( 1779 attr, struct target_core_configfs_attribute, attr); 1780 1781 if (!tc_attr->store) 1782 return -EINVAL; 1783 1784 return tc_attr->store(dev, page, count); 1785 } 1786 1787 static struct configfs_item_operations target_core_dev_item_ops = { 1788 .release = target_core_dev_release, 1789 .show_attribute = target_core_dev_show, 1790 .store_attribute = target_core_dev_store, 1791 }; 1792 1793 static struct config_item_type target_core_dev_cit = { 1794 .ct_item_ops = &target_core_dev_item_ops, 1795 .ct_attrs = lio_core_dev_attrs, 1796 .ct_owner = THIS_MODULE, 1797 }; 1798 1799 /* End functions for struct config_item_type target_core_dev_cit */ 1800 1801 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 1802 1803 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp); 1804 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \ 1805 static struct target_core_alua_lu_gp_attribute \ 1806 target_core_alua_lu_gp_##_name = \ 1807 __CONFIGFS_EATTR(_name, _mode, \ 1808 target_core_alua_lu_gp_show_attr_##_name, \ 1809 target_core_alua_lu_gp_store_attr_##_name); 1810 1811 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \ 1812 static struct target_core_alua_lu_gp_attribute \ 1813 target_core_alua_lu_gp_##_name = \ 1814 __CONFIGFS_EATTR_RO(_name, \ 1815 target_core_alua_lu_gp_show_attr_##_name); 1816 1817 /* 1818 * lu_gp_id 1819 */ 1820 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id( 1821 struct t10_alua_lu_gp *lu_gp, 1822 char *page) 1823 { 1824 if (!lu_gp->lu_gp_valid_id) 1825 return 0; 1826 1827 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 1828 } 1829 1830 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id( 1831 struct t10_alua_lu_gp *lu_gp, 1832 const char *page, 1833 size_t count) 1834 { 1835 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 1836 unsigned long lu_gp_id; 1837 int ret; 1838 1839 ret = strict_strtoul(page, 0, &lu_gp_id); 1840 if (ret < 0) { 1841 pr_err("strict_strtoul() returned %d for" 1842 " lu_gp_id\n", ret); 1843 return -EINVAL; 1844 } 1845 if (lu_gp_id > 0x0000ffff) { 1846 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 1847 " 0x0000ffff\n", lu_gp_id); 1848 return -EINVAL; 1849 } 1850 1851 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 1852 if (ret < 0) 1853 return -EINVAL; 1854 1855 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 1856 " Group: core/alua/lu_gps/%s to ID: %hu\n", 1857 config_item_name(&alua_lu_gp_cg->cg_item), 1858 lu_gp->lu_gp_id); 1859 1860 return count; 1861 } 1862 1863 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR); 1864 1865 /* 1866 * members 1867 */ 1868 static ssize_t target_core_alua_lu_gp_show_attr_members( 1869 struct t10_alua_lu_gp *lu_gp, 1870 char *page) 1871 { 1872 struct se_device *dev; 1873 struct se_hba *hba; 1874 struct t10_alua_lu_gp_member *lu_gp_mem; 1875 ssize_t len = 0, cur_len; 1876 unsigned char buf[LU_GROUP_NAME_BUF]; 1877 1878 memset(buf, 0, LU_GROUP_NAME_BUF); 1879 1880 spin_lock(&lu_gp->lu_gp_lock); 1881 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 1882 dev = lu_gp_mem->lu_gp_mem_dev; 1883 hba = dev->se_hba; 1884 1885 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 1886 config_item_name(&hba->hba_group.cg_item), 1887 config_item_name(&dev->dev_group.cg_item)); 1888 cur_len++; /* Extra byte for NULL terminator */ 1889 1890 if ((cur_len + len) > PAGE_SIZE) { 1891 pr_warn("Ran out of lu_gp_show_attr" 1892 "_members buffer\n"); 1893 break; 1894 } 1895 memcpy(page+len, buf, cur_len); 1896 len += cur_len; 1897 } 1898 spin_unlock(&lu_gp->lu_gp_lock); 1899 1900 return len; 1901 } 1902 1903 SE_DEV_ALUA_LU_ATTR_RO(members); 1904 1905 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group); 1906 1907 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 1908 &target_core_alua_lu_gp_lu_gp_id.attr, 1909 &target_core_alua_lu_gp_members.attr, 1910 NULL, 1911 }; 1912 1913 static void target_core_alua_lu_gp_release(struct config_item *item) 1914 { 1915 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 1916 struct t10_alua_lu_gp, lu_gp_group); 1917 1918 core_alua_free_lu_gp(lu_gp); 1919 } 1920 1921 static struct configfs_item_operations target_core_alua_lu_gp_ops = { 1922 .release = target_core_alua_lu_gp_release, 1923 .show_attribute = target_core_alua_lu_gp_attr_show, 1924 .store_attribute = target_core_alua_lu_gp_attr_store, 1925 }; 1926 1927 static struct config_item_type target_core_alua_lu_gp_cit = { 1928 .ct_item_ops = &target_core_alua_lu_gp_ops, 1929 .ct_attrs = target_core_alua_lu_gp_attrs, 1930 .ct_owner = THIS_MODULE, 1931 }; 1932 1933 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 1934 1935 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 1936 1937 static struct config_group *target_core_alua_create_lu_gp( 1938 struct config_group *group, 1939 const char *name) 1940 { 1941 struct t10_alua_lu_gp *lu_gp; 1942 struct config_group *alua_lu_gp_cg = NULL; 1943 struct config_item *alua_lu_gp_ci = NULL; 1944 1945 lu_gp = core_alua_allocate_lu_gp(name, 0); 1946 if (IS_ERR(lu_gp)) 1947 return NULL; 1948 1949 alua_lu_gp_cg = &lu_gp->lu_gp_group; 1950 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 1951 1952 config_group_init_type_name(alua_lu_gp_cg, name, 1953 &target_core_alua_lu_gp_cit); 1954 1955 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 1956 " Group: core/alua/lu_gps/%s\n", 1957 config_item_name(alua_lu_gp_ci)); 1958 1959 return alua_lu_gp_cg; 1960 1961 } 1962 1963 static void target_core_alua_drop_lu_gp( 1964 struct config_group *group, 1965 struct config_item *item) 1966 { 1967 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 1968 struct t10_alua_lu_gp, lu_gp_group); 1969 1970 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 1971 " Group: core/alua/lu_gps/%s, ID: %hu\n", 1972 config_item_name(item), lu_gp->lu_gp_id); 1973 /* 1974 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 1975 * -> target_core_alua_lu_gp_release() 1976 */ 1977 config_item_put(item); 1978 } 1979 1980 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 1981 .make_group = &target_core_alua_create_lu_gp, 1982 .drop_item = &target_core_alua_drop_lu_gp, 1983 }; 1984 1985 static struct config_item_type target_core_alua_lu_gps_cit = { 1986 .ct_item_ops = NULL, 1987 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 1988 .ct_owner = THIS_MODULE, 1989 }; 1990 1991 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 1992 1993 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 1994 1995 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp); 1996 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \ 1997 static struct target_core_alua_tg_pt_gp_attribute \ 1998 target_core_alua_tg_pt_gp_##_name = \ 1999 __CONFIGFS_EATTR(_name, _mode, \ 2000 target_core_alua_tg_pt_gp_show_attr_##_name, \ 2001 target_core_alua_tg_pt_gp_store_attr_##_name); 2002 2003 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \ 2004 static struct target_core_alua_tg_pt_gp_attribute \ 2005 target_core_alua_tg_pt_gp_##_name = \ 2006 __CONFIGFS_EATTR_RO(_name, \ 2007 target_core_alua_tg_pt_gp_show_attr_##_name); 2008 2009 /* 2010 * alua_access_state 2011 */ 2012 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state( 2013 struct t10_alua_tg_pt_gp *tg_pt_gp, 2014 char *page) 2015 { 2016 return sprintf(page, "%d\n", 2017 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state)); 2018 } 2019 2020 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state( 2021 struct t10_alua_tg_pt_gp *tg_pt_gp, 2022 const char *page, 2023 size_t count) 2024 { 2025 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; 2026 unsigned long tmp; 2027 int new_state, ret; 2028 2029 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2030 pr_err("Unable to do implict ALUA on non valid" 2031 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id); 2032 return -EINVAL; 2033 } 2034 2035 ret = strict_strtoul(page, 0, &tmp); 2036 if (ret < 0) { 2037 pr_err("Unable to extract new ALUA access state from" 2038 " %s\n", page); 2039 return -EINVAL; 2040 } 2041 new_state = (int)tmp; 2042 2043 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) { 2044 pr_err("Unable to process implict configfs ALUA" 2045 " transition while TPGS_IMPLICT_ALUA is disabled\n"); 2046 return -EINVAL; 2047 } 2048 2049 ret = core_alua_do_port_transition(tg_pt_gp, dev, 2050 NULL, NULL, new_state, 0); 2051 return (!ret) ? count : -EINVAL; 2052 } 2053 2054 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR); 2055 2056 /* 2057 * alua_access_status 2058 */ 2059 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status( 2060 struct t10_alua_tg_pt_gp *tg_pt_gp, 2061 char *page) 2062 { 2063 return sprintf(page, "%s\n", 2064 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2065 } 2066 2067 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status( 2068 struct t10_alua_tg_pt_gp *tg_pt_gp, 2069 const char *page, 2070 size_t count) 2071 { 2072 unsigned long tmp; 2073 int new_status, ret; 2074 2075 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2076 pr_err("Unable to do set ALUA access status on non" 2077 " valid tg_pt_gp ID: %hu\n", 2078 tg_pt_gp->tg_pt_gp_valid_id); 2079 return -EINVAL; 2080 } 2081 2082 ret = strict_strtoul(page, 0, &tmp); 2083 if (ret < 0) { 2084 pr_err("Unable to extract new ALUA access status" 2085 " from %s\n", page); 2086 return -EINVAL; 2087 } 2088 new_status = (int)tmp; 2089 2090 if ((new_status != ALUA_STATUS_NONE) && 2091 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) && 2092 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) { 2093 pr_err("Illegal ALUA access status: 0x%02x\n", 2094 new_status); 2095 return -EINVAL; 2096 } 2097 2098 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2099 return count; 2100 } 2101 2102 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR); 2103 2104 /* 2105 * alua_access_type 2106 */ 2107 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type( 2108 struct t10_alua_tg_pt_gp *tg_pt_gp, 2109 char *page) 2110 { 2111 return core_alua_show_access_type(tg_pt_gp, page); 2112 } 2113 2114 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type( 2115 struct t10_alua_tg_pt_gp *tg_pt_gp, 2116 const char *page, 2117 size_t count) 2118 { 2119 return core_alua_store_access_type(tg_pt_gp, page, count); 2120 } 2121 2122 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR); 2123 2124 /* 2125 * alua_write_metadata 2126 */ 2127 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata( 2128 struct t10_alua_tg_pt_gp *tg_pt_gp, 2129 char *page) 2130 { 2131 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata); 2132 } 2133 2134 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata( 2135 struct t10_alua_tg_pt_gp *tg_pt_gp, 2136 const char *page, 2137 size_t count) 2138 { 2139 unsigned long tmp; 2140 int ret; 2141 2142 ret = strict_strtoul(page, 0, &tmp); 2143 if (ret < 0) { 2144 pr_err("Unable to extract alua_write_metadata\n"); 2145 return -EINVAL; 2146 } 2147 2148 if ((tmp != 0) && (tmp != 1)) { 2149 pr_err("Illegal value for alua_write_metadata:" 2150 " %lu\n", tmp); 2151 return -EINVAL; 2152 } 2153 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 2154 2155 return count; 2156 } 2157 2158 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR); 2159 2160 2161 2162 /* 2163 * nonop_delay_msecs 2164 */ 2165 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs( 2166 struct t10_alua_tg_pt_gp *tg_pt_gp, 2167 char *page) 2168 { 2169 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page); 2170 2171 } 2172 2173 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs( 2174 struct t10_alua_tg_pt_gp *tg_pt_gp, 2175 const char *page, 2176 size_t count) 2177 { 2178 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count); 2179 } 2180 2181 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR); 2182 2183 /* 2184 * trans_delay_msecs 2185 */ 2186 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs( 2187 struct t10_alua_tg_pt_gp *tg_pt_gp, 2188 char *page) 2189 { 2190 return core_alua_show_trans_delay_msecs(tg_pt_gp, page); 2191 } 2192 2193 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs( 2194 struct t10_alua_tg_pt_gp *tg_pt_gp, 2195 const char *page, 2196 size_t count) 2197 { 2198 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count); 2199 } 2200 2201 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR); 2202 2203 /* 2204 * implict_trans_secs 2205 */ 2206 static ssize_t target_core_alua_tg_pt_gp_show_attr_implict_trans_secs( 2207 struct t10_alua_tg_pt_gp *tg_pt_gp, 2208 char *page) 2209 { 2210 return core_alua_show_implict_trans_secs(tg_pt_gp, page); 2211 } 2212 2213 static ssize_t target_core_alua_tg_pt_gp_store_attr_implict_trans_secs( 2214 struct t10_alua_tg_pt_gp *tg_pt_gp, 2215 const char *page, 2216 size_t count) 2217 { 2218 return core_alua_store_implict_trans_secs(tg_pt_gp, page, count); 2219 } 2220 2221 SE_DEV_ALUA_TG_PT_ATTR(implict_trans_secs, S_IRUGO | S_IWUSR); 2222 2223 /* 2224 * preferred 2225 */ 2226 2227 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred( 2228 struct t10_alua_tg_pt_gp *tg_pt_gp, 2229 char *page) 2230 { 2231 return core_alua_show_preferred_bit(tg_pt_gp, page); 2232 } 2233 2234 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred( 2235 struct t10_alua_tg_pt_gp *tg_pt_gp, 2236 const char *page, 2237 size_t count) 2238 { 2239 return core_alua_store_preferred_bit(tg_pt_gp, page, count); 2240 } 2241 2242 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR); 2243 2244 /* 2245 * tg_pt_gp_id 2246 */ 2247 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id( 2248 struct t10_alua_tg_pt_gp *tg_pt_gp, 2249 char *page) 2250 { 2251 if (!tg_pt_gp->tg_pt_gp_valid_id) 2252 return 0; 2253 2254 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 2255 } 2256 2257 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id( 2258 struct t10_alua_tg_pt_gp *tg_pt_gp, 2259 const char *page, 2260 size_t count) 2261 { 2262 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2263 unsigned long tg_pt_gp_id; 2264 int ret; 2265 2266 ret = strict_strtoul(page, 0, &tg_pt_gp_id); 2267 if (ret < 0) { 2268 pr_err("strict_strtoul() returned %d for" 2269 " tg_pt_gp_id\n", ret); 2270 return -EINVAL; 2271 } 2272 if (tg_pt_gp_id > 0x0000ffff) { 2273 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:" 2274 " 0x0000ffff\n", tg_pt_gp_id); 2275 return -EINVAL; 2276 } 2277 2278 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 2279 if (ret < 0) 2280 return -EINVAL; 2281 2282 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 2283 "core/alua/tg_pt_gps/%s to ID: %hu\n", 2284 config_item_name(&alua_tg_pt_gp_cg->cg_item), 2285 tg_pt_gp->tg_pt_gp_id); 2286 2287 return count; 2288 } 2289 2290 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR); 2291 2292 /* 2293 * members 2294 */ 2295 static ssize_t target_core_alua_tg_pt_gp_show_attr_members( 2296 struct t10_alua_tg_pt_gp *tg_pt_gp, 2297 char *page) 2298 { 2299 struct se_port *port; 2300 struct se_portal_group *tpg; 2301 struct se_lun *lun; 2302 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; 2303 ssize_t len = 0, cur_len; 2304 unsigned char buf[TG_PT_GROUP_NAME_BUF]; 2305 2306 memset(buf, 0, TG_PT_GROUP_NAME_BUF); 2307 2308 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 2309 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list, 2310 tg_pt_gp_mem_list) { 2311 port = tg_pt_gp_mem->tg_pt; 2312 tpg = port->sep_tpg; 2313 lun = port->sep_lun; 2314 2315 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 2316 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(), 2317 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 2318 tpg->se_tpg_tfo->tpg_get_tag(tpg), 2319 config_item_name(&lun->lun_group.cg_item)); 2320 cur_len++; /* Extra byte for NULL terminator */ 2321 2322 if ((cur_len + len) > PAGE_SIZE) { 2323 pr_warn("Ran out of lu_gp_show_attr" 2324 "_members buffer\n"); 2325 break; 2326 } 2327 memcpy(page+len, buf, cur_len); 2328 len += cur_len; 2329 } 2330 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 2331 2332 return len; 2333 } 2334 2335 SE_DEV_ALUA_TG_PT_ATTR_RO(members); 2336 2337 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp, 2338 tg_pt_gp_group); 2339 2340 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 2341 &target_core_alua_tg_pt_gp_alua_access_state.attr, 2342 &target_core_alua_tg_pt_gp_alua_access_status.attr, 2343 &target_core_alua_tg_pt_gp_alua_access_type.attr, 2344 &target_core_alua_tg_pt_gp_alua_write_metadata.attr, 2345 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr, 2346 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr, 2347 &target_core_alua_tg_pt_gp_implict_trans_secs.attr, 2348 &target_core_alua_tg_pt_gp_preferred.attr, 2349 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr, 2350 &target_core_alua_tg_pt_gp_members.attr, 2351 NULL, 2352 }; 2353 2354 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 2355 { 2356 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2357 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2358 2359 core_alua_free_tg_pt_gp(tg_pt_gp); 2360 } 2361 2362 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 2363 .release = target_core_alua_tg_pt_gp_release, 2364 .show_attribute = target_core_alua_tg_pt_gp_attr_show, 2365 .store_attribute = target_core_alua_tg_pt_gp_attr_store, 2366 }; 2367 2368 static struct config_item_type target_core_alua_tg_pt_gp_cit = { 2369 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 2370 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 2371 .ct_owner = THIS_MODULE, 2372 }; 2373 2374 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2375 2376 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */ 2377 2378 static struct config_group *target_core_alua_create_tg_pt_gp( 2379 struct config_group *group, 2380 const char *name) 2381 { 2382 struct t10_alua *alua = container_of(group, struct t10_alua, 2383 alua_tg_pt_gps_group); 2384 struct t10_alua_tg_pt_gp *tg_pt_gp; 2385 struct config_group *alua_tg_pt_gp_cg = NULL; 2386 struct config_item *alua_tg_pt_gp_ci = NULL; 2387 2388 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0); 2389 if (!tg_pt_gp) 2390 return NULL; 2391 2392 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2393 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 2394 2395 config_group_init_type_name(alua_tg_pt_gp_cg, name, 2396 &target_core_alua_tg_pt_gp_cit); 2397 2398 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 2399 " Group: alua/tg_pt_gps/%s\n", 2400 config_item_name(alua_tg_pt_gp_ci)); 2401 2402 return alua_tg_pt_gp_cg; 2403 } 2404 2405 static void target_core_alua_drop_tg_pt_gp( 2406 struct config_group *group, 2407 struct config_item *item) 2408 { 2409 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2410 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2411 2412 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 2413 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 2414 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 2415 /* 2416 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 2417 * -> target_core_alua_tg_pt_gp_release(). 2418 */ 2419 config_item_put(item); 2420 } 2421 2422 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 2423 .make_group = &target_core_alua_create_tg_pt_gp, 2424 .drop_item = &target_core_alua_drop_tg_pt_gp, 2425 }; 2426 2427 static struct config_item_type target_core_alua_tg_pt_gps_cit = { 2428 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops, 2429 .ct_owner = THIS_MODULE, 2430 }; 2431 2432 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */ 2433 2434 /* Start functions for struct config_item_type target_core_alua_cit */ 2435 2436 /* 2437 * target_core_alua_cit is a ConfigFS group that lives under 2438 * /sys/kernel/config/target/core/alua. There are default groups 2439 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 2440 * target_core_alua_cit in target_core_init_configfs() below. 2441 */ 2442 static struct config_item_type target_core_alua_cit = { 2443 .ct_item_ops = NULL, 2444 .ct_attrs = NULL, 2445 .ct_owner = THIS_MODULE, 2446 }; 2447 2448 /* End functions for struct config_item_type target_core_alua_cit */ 2449 2450 /* Start functions for struct config_item_type target_core_stat_cit */ 2451 2452 static struct config_group *target_core_stat_mkdir( 2453 struct config_group *group, 2454 const char *name) 2455 { 2456 return ERR_PTR(-ENOSYS); 2457 } 2458 2459 static void target_core_stat_rmdir( 2460 struct config_group *group, 2461 struct config_item *item) 2462 { 2463 return; 2464 } 2465 2466 static struct configfs_group_operations target_core_stat_group_ops = { 2467 .make_group = &target_core_stat_mkdir, 2468 .drop_item = &target_core_stat_rmdir, 2469 }; 2470 2471 static struct config_item_type target_core_stat_cit = { 2472 .ct_group_ops = &target_core_stat_group_ops, 2473 .ct_owner = THIS_MODULE, 2474 }; 2475 2476 /* End functions for struct config_item_type target_core_stat_cit */ 2477 2478 /* Start functions for struct config_item_type target_core_hba_cit */ 2479 2480 static struct config_group *target_core_make_subdev( 2481 struct config_group *group, 2482 const char *name) 2483 { 2484 struct t10_alua_tg_pt_gp *tg_pt_gp; 2485 struct se_subsystem_api *t; 2486 struct config_item *hba_ci = &group->cg_item; 2487 struct se_hba *hba = item_to_hba(hba_ci); 2488 struct se_device *dev; 2489 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL; 2490 struct config_group *dev_stat_grp = NULL; 2491 int errno = -ENOMEM, ret; 2492 2493 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 2494 if (ret) 2495 return ERR_PTR(ret); 2496 /* 2497 * Locate the struct se_subsystem_api from parent's struct se_hba. 2498 */ 2499 t = hba->transport; 2500 2501 dev = target_alloc_device(hba, name); 2502 if (!dev) 2503 goto out_unlock; 2504 2505 dev_cg = &dev->dev_group; 2506 2507 dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6, 2508 GFP_KERNEL); 2509 if (!dev_cg->default_groups) 2510 goto out_free_device; 2511 2512 config_group_init_type_name(dev_cg, name, &target_core_dev_cit); 2513 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib", 2514 &target_core_dev_attrib_cit); 2515 config_group_init_type_name(&dev->dev_pr_group, "pr", 2516 &target_core_dev_pr_cit); 2517 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn", 2518 &target_core_dev_wwn_cit); 2519 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group, 2520 "alua", &target_core_alua_tg_pt_gps_cit); 2521 config_group_init_type_name(&dev->dev_stat_grps.stat_group, 2522 "statistics", &target_core_stat_cit); 2523 2524 dev_cg->default_groups[0] = &dev->dev_attrib.da_group; 2525 dev_cg->default_groups[1] = &dev->dev_pr_group; 2526 dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group; 2527 dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group; 2528 dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group; 2529 dev_cg->default_groups[5] = NULL; 2530 /* 2531 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 2532 */ 2533 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1); 2534 if (!tg_pt_gp) 2535 goto out_free_dev_cg_default_groups; 2536 dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 2537 2538 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group; 2539 tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 2540 GFP_KERNEL); 2541 if (!tg_pt_gp_cg->default_groups) { 2542 pr_err("Unable to allocate tg_pt_gp_cg->" 2543 "default_groups\n"); 2544 goto out_free_tg_pt_gp; 2545 } 2546 2547 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 2548 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 2549 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group; 2550 tg_pt_gp_cg->default_groups[1] = NULL; 2551 /* 2552 * Add core/$HBA/$DEV/statistics/ default groups 2553 */ 2554 dev_stat_grp = &dev->dev_stat_grps.stat_group; 2555 dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4, 2556 GFP_KERNEL); 2557 if (!dev_stat_grp->default_groups) { 2558 pr_err("Unable to allocate dev_stat_grp->default_groups\n"); 2559 goto out_free_tg_pt_gp_cg_default_groups; 2560 } 2561 target_stat_setup_dev_default_groups(dev); 2562 2563 mutex_unlock(&hba->hba_access_mutex); 2564 return dev_cg; 2565 2566 out_free_tg_pt_gp_cg_default_groups: 2567 kfree(tg_pt_gp_cg->default_groups); 2568 out_free_tg_pt_gp: 2569 core_alua_free_tg_pt_gp(tg_pt_gp); 2570 out_free_dev_cg_default_groups: 2571 kfree(dev_cg->default_groups); 2572 out_free_device: 2573 target_free_device(dev); 2574 out_unlock: 2575 mutex_unlock(&hba->hba_access_mutex); 2576 return ERR_PTR(errno); 2577 } 2578 2579 static void target_core_drop_subdev( 2580 struct config_group *group, 2581 struct config_item *item) 2582 { 2583 struct config_group *dev_cg = to_config_group(item); 2584 struct se_device *dev = 2585 container_of(dev_cg, struct se_device, dev_group); 2586 struct se_hba *hba; 2587 struct config_item *df_item; 2588 struct config_group *tg_pt_gp_cg, *dev_stat_grp; 2589 int i; 2590 2591 hba = item_to_hba(&dev->se_hba->hba_group.cg_item); 2592 2593 mutex_lock(&hba->hba_access_mutex); 2594 2595 dev_stat_grp = &dev->dev_stat_grps.stat_group; 2596 for (i = 0; dev_stat_grp->default_groups[i]; i++) { 2597 df_item = &dev_stat_grp->default_groups[i]->cg_item; 2598 dev_stat_grp->default_groups[i] = NULL; 2599 config_item_put(df_item); 2600 } 2601 kfree(dev_stat_grp->default_groups); 2602 2603 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group; 2604 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) { 2605 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item; 2606 tg_pt_gp_cg->default_groups[i] = NULL; 2607 config_item_put(df_item); 2608 } 2609 kfree(tg_pt_gp_cg->default_groups); 2610 /* 2611 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 2612 * directly from target_core_alua_tg_pt_gp_release(). 2613 */ 2614 dev->t10_alua.default_tg_pt_gp = NULL; 2615 2616 for (i = 0; dev_cg->default_groups[i]; i++) { 2617 df_item = &dev_cg->default_groups[i]->cg_item; 2618 dev_cg->default_groups[i] = NULL; 2619 config_item_put(df_item); 2620 } 2621 /* 2622 * se_dev is released from target_core_dev_item_ops->release() 2623 */ 2624 config_item_put(item); 2625 mutex_unlock(&hba->hba_access_mutex); 2626 } 2627 2628 static struct configfs_group_operations target_core_hba_group_ops = { 2629 .make_group = target_core_make_subdev, 2630 .drop_item = target_core_drop_subdev, 2631 }; 2632 2633 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba); 2634 #define SE_HBA_ATTR(_name, _mode) \ 2635 static struct target_core_hba_attribute \ 2636 target_core_hba_##_name = \ 2637 __CONFIGFS_EATTR(_name, _mode, \ 2638 target_core_hba_show_attr_##_name, \ 2639 target_core_hba_store_attr_##_name); 2640 2641 #define SE_HBA_ATTR_RO(_name) \ 2642 static struct target_core_hba_attribute \ 2643 target_core_hba_##_name = \ 2644 __CONFIGFS_EATTR_RO(_name, \ 2645 target_core_hba_show_attr_##_name); 2646 2647 static ssize_t target_core_hba_show_attr_hba_info( 2648 struct se_hba *hba, 2649 char *page) 2650 { 2651 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 2652 hba->hba_id, hba->transport->name, 2653 TARGET_CORE_CONFIGFS_VERSION); 2654 } 2655 2656 SE_HBA_ATTR_RO(hba_info); 2657 2658 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba, 2659 char *page) 2660 { 2661 int hba_mode = 0; 2662 2663 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 2664 hba_mode = 1; 2665 2666 return sprintf(page, "%d\n", hba_mode); 2667 } 2668 2669 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba, 2670 const char *page, size_t count) 2671 { 2672 struct se_subsystem_api *transport = hba->transport; 2673 unsigned long mode_flag; 2674 int ret; 2675 2676 if (transport->pmode_enable_hba == NULL) 2677 return -EINVAL; 2678 2679 ret = strict_strtoul(page, 0, &mode_flag); 2680 if (ret < 0) { 2681 pr_err("Unable to extract hba mode flag: %d\n", ret); 2682 return -EINVAL; 2683 } 2684 2685 if (hba->dev_count) { 2686 pr_err("Unable to set hba_mode with active devices\n"); 2687 return -EINVAL; 2688 } 2689 2690 ret = transport->pmode_enable_hba(hba, mode_flag); 2691 if (ret < 0) 2692 return -EINVAL; 2693 if (ret > 0) 2694 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 2695 else if (ret == 0) 2696 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 2697 2698 return count; 2699 } 2700 2701 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR); 2702 2703 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group); 2704 2705 static void target_core_hba_release(struct config_item *item) 2706 { 2707 struct se_hba *hba = container_of(to_config_group(item), 2708 struct se_hba, hba_group); 2709 core_delete_hba(hba); 2710 } 2711 2712 static struct configfs_attribute *target_core_hba_attrs[] = { 2713 &target_core_hba_hba_info.attr, 2714 &target_core_hba_hba_mode.attr, 2715 NULL, 2716 }; 2717 2718 static struct configfs_item_operations target_core_hba_item_ops = { 2719 .release = target_core_hba_release, 2720 .show_attribute = target_core_hba_attr_show, 2721 .store_attribute = target_core_hba_attr_store, 2722 }; 2723 2724 static struct config_item_type target_core_hba_cit = { 2725 .ct_item_ops = &target_core_hba_item_ops, 2726 .ct_group_ops = &target_core_hba_group_ops, 2727 .ct_attrs = target_core_hba_attrs, 2728 .ct_owner = THIS_MODULE, 2729 }; 2730 2731 static struct config_group *target_core_call_addhbatotarget( 2732 struct config_group *group, 2733 const char *name) 2734 { 2735 char *se_plugin_str, *str, *str2; 2736 struct se_hba *hba; 2737 char buf[TARGET_CORE_NAME_MAX_LEN]; 2738 unsigned long plugin_dep_id = 0; 2739 int ret; 2740 2741 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN); 2742 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 2743 pr_err("Passed *name strlen(): %d exceeds" 2744 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 2745 TARGET_CORE_NAME_MAX_LEN); 2746 return ERR_PTR(-ENAMETOOLONG); 2747 } 2748 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 2749 2750 str = strstr(buf, "_"); 2751 if (!str) { 2752 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 2753 return ERR_PTR(-EINVAL); 2754 } 2755 se_plugin_str = buf; 2756 /* 2757 * Special case for subsystem plugins that have "_" in their names. 2758 * Namely rd_direct and rd_mcp.. 2759 */ 2760 str2 = strstr(str+1, "_"); 2761 if (str2) { 2762 *str2 = '\0'; /* Terminate for *se_plugin_str */ 2763 str2++; /* Skip to start of plugin dependent ID */ 2764 str = str2; 2765 } else { 2766 *str = '\0'; /* Terminate for *se_plugin_str */ 2767 str++; /* Skip to start of plugin dependent ID */ 2768 } 2769 2770 ret = strict_strtoul(str, 0, &plugin_dep_id); 2771 if (ret < 0) { 2772 pr_err("strict_strtoul() returned %d for" 2773 " plugin_dep_id\n", ret); 2774 return ERR_PTR(-EINVAL); 2775 } 2776 /* 2777 * Load up TCM subsystem plugins if they have not already been loaded. 2778 */ 2779 transport_subsystem_check_init(); 2780 2781 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 2782 if (IS_ERR(hba)) 2783 return ERR_CAST(hba); 2784 2785 config_group_init_type_name(&hba->hba_group, name, 2786 &target_core_hba_cit); 2787 2788 return &hba->hba_group; 2789 } 2790 2791 static void target_core_call_delhbafromtarget( 2792 struct config_group *group, 2793 struct config_item *item) 2794 { 2795 /* 2796 * core_delete_hba() is called from target_core_hba_item_ops->release() 2797 * -> target_core_hba_release() 2798 */ 2799 config_item_put(item); 2800 } 2801 2802 static struct configfs_group_operations target_core_group_ops = { 2803 .make_group = target_core_call_addhbatotarget, 2804 .drop_item = target_core_call_delhbafromtarget, 2805 }; 2806 2807 static struct config_item_type target_core_cit = { 2808 .ct_item_ops = NULL, 2809 .ct_group_ops = &target_core_group_ops, 2810 .ct_attrs = NULL, 2811 .ct_owner = THIS_MODULE, 2812 }; 2813 2814 /* Stop functions for struct config_item_type target_core_hba_cit */ 2815 2816 static int __init target_core_init_configfs(void) 2817 { 2818 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL; 2819 struct config_group *lu_gp_cg = NULL; 2820 struct configfs_subsystem *subsys; 2821 struct t10_alua_lu_gp *lu_gp; 2822 int ret; 2823 2824 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 2825 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 2826 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 2827 2828 subsys = target_core_subsystem[0]; 2829 config_group_init(&subsys->su_group); 2830 mutex_init(&subsys->su_mutex); 2831 2832 ret = init_se_kmem_caches(); 2833 if (ret < 0) 2834 return ret; 2835 /* 2836 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 2837 * and ALUA Logical Unit Group and Target Port Group infrastructure. 2838 */ 2839 target_cg = &subsys->su_group; 2840 target_cg->default_groups = kmalloc(sizeof(struct config_group) * 2, 2841 GFP_KERNEL); 2842 if (!target_cg->default_groups) { 2843 pr_err("Unable to allocate target_cg->default_groups\n"); 2844 ret = -ENOMEM; 2845 goto out_global; 2846 } 2847 2848 config_group_init_type_name(&target_core_hbagroup, 2849 "core", &target_core_cit); 2850 target_cg->default_groups[0] = &target_core_hbagroup; 2851 target_cg->default_groups[1] = NULL; 2852 /* 2853 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 2854 */ 2855 hba_cg = &target_core_hbagroup; 2856 hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 2857 GFP_KERNEL); 2858 if (!hba_cg->default_groups) { 2859 pr_err("Unable to allocate hba_cg->default_groups\n"); 2860 ret = -ENOMEM; 2861 goto out_global; 2862 } 2863 config_group_init_type_name(&alua_group, 2864 "alua", &target_core_alua_cit); 2865 hba_cg->default_groups[0] = &alua_group; 2866 hba_cg->default_groups[1] = NULL; 2867 /* 2868 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 2869 * groups under /sys/kernel/config/target/core/alua/ 2870 */ 2871 alua_cg = &alua_group; 2872 alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 2873 GFP_KERNEL); 2874 if (!alua_cg->default_groups) { 2875 pr_err("Unable to allocate alua_cg->default_groups\n"); 2876 ret = -ENOMEM; 2877 goto out_global; 2878 } 2879 2880 config_group_init_type_name(&alua_lu_gps_group, 2881 "lu_gps", &target_core_alua_lu_gps_cit); 2882 alua_cg->default_groups[0] = &alua_lu_gps_group; 2883 alua_cg->default_groups[1] = NULL; 2884 /* 2885 * Add core/alua/lu_gps/default_lu_gp 2886 */ 2887 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 2888 if (IS_ERR(lu_gp)) { 2889 ret = -ENOMEM; 2890 goto out_global; 2891 } 2892 2893 lu_gp_cg = &alua_lu_gps_group; 2894 lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 2895 GFP_KERNEL); 2896 if (!lu_gp_cg->default_groups) { 2897 pr_err("Unable to allocate lu_gp_cg->default_groups\n"); 2898 ret = -ENOMEM; 2899 goto out_global; 2900 } 2901 2902 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 2903 &target_core_alua_lu_gp_cit); 2904 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group; 2905 lu_gp_cg->default_groups[1] = NULL; 2906 default_lu_gp = lu_gp; 2907 /* 2908 * Register the target_core_mod subsystem with configfs. 2909 */ 2910 ret = configfs_register_subsystem(subsys); 2911 if (ret < 0) { 2912 pr_err("Error %d while registering subsystem %s\n", 2913 ret, subsys->su_group.cg_item.ci_namebuf); 2914 goto out_global; 2915 } 2916 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 2917 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s" 2918 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 2919 /* 2920 * Register built-in RAMDISK subsystem logic for virtual LUN 0 2921 */ 2922 ret = rd_module_init(); 2923 if (ret < 0) 2924 goto out; 2925 2926 ret = core_dev_setup_virtual_lun0(); 2927 if (ret < 0) 2928 goto out; 2929 2930 return 0; 2931 2932 out: 2933 configfs_unregister_subsystem(subsys); 2934 core_dev_release_virtual_lun0(); 2935 rd_module_exit(); 2936 out_global: 2937 if (default_lu_gp) { 2938 core_alua_free_lu_gp(default_lu_gp); 2939 default_lu_gp = NULL; 2940 } 2941 if (lu_gp_cg) 2942 kfree(lu_gp_cg->default_groups); 2943 if (alua_cg) 2944 kfree(alua_cg->default_groups); 2945 if (hba_cg) 2946 kfree(hba_cg->default_groups); 2947 kfree(target_cg->default_groups); 2948 release_se_kmem_caches(); 2949 return ret; 2950 } 2951 2952 static void __exit target_core_exit_configfs(void) 2953 { 2954 struct configfs_subsystem *subsys; 2955 struct config_group *hba_cg, *alua_cg, *lu_gp_cg; 2956 struct config_item *item; 2957 int i; 2958 2959 subsys = target_core_subsystem[0]; 2960 2961 lu_gp_cg = &alua_lu_gps_group; 2962 for (i = 0; lu_gp_cg->default_groups[i]; i++) { 2963 item = &lu_gp_cg->default_groups[i]->cg_item; 2964 lu_gp_cg->default_groups[i] = NULL; 2965 config_item_put(item); 2966 } 2967 kfree(lu_gp_cg->default_groups); 2968 lu_gp_cg->default_groups = NULL; 2969 2970 alua_cg = &alua_group; 2971 for (i = 0; alua_cg->default_groups[i]; i++) { 2972 item = &alua_cg->default_groups[i]->cg_item; 2973 alua_cg->default_groups[i] = NULL; 2974 config_item_put(item); 2975 } 2976 kfree(alua_cg->default_groups); 2977 alua_cg->default_groups = NULL; 2978 2979 hba_cg = &target_core_hbagroup; 2980 for (i = 0; hba_cg->default_groups[i]; i++) { 2981 item = &hba_cg->default_groups[i]->cg_item; 2982 hba_cg->default_groups[i] = NULL; 2983 config_item_put(item); 2984 } 2985 kfree(hba_cg->default_groups); 2986 hba_cg->default_groups = NULL; 2987 /* 2988 * We expect subsys->su_group.default_groups to be released 2989 * by configfs subsystem provider logic.. 2990 */ 2991 configfs_unregister_subsystem(subsys); 2992 kfree(subsys->su_group.default_groups); 2993 2994 core_alua_free_lu_gp(default_lu_gp); 2995 default_lu_gp = NULL; 2996 2997 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 2998 " Infrastructure\n"); 2999 3000 core_dev_release_virtual_lun0(); 3001 rd_module_exit(); 3002 release_se_kmem_caches(); 3003 } 3004 3005 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3006 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3007 MODULE_LICENSE("GPL"); 3008 3009 module_init(target_core_init_configfs); 3010 module_exit(target_core_exit_configfs); 3011