1 /******************************************************************************* 2 * Filename: target_core_configfs.c 3 * 4 * This file contains ConfigFS logic for the Generic Target Engine project. 5 * 6 * (c) Copyright 2008-2013 Datera, Inc. 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/configfs_macros.h> 45 46 #include "target_core_internal.h" 47 #include "target_core_alua.h" 48 #include "target_core_pr.h" 49 #include "target_core_rd.h" 50 #include "target_core_xcopy.h" 51 52 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \ 53 static void target_core_setup_##_name##_cit(struct target_backend *tb) \ 54 { \ 55 struct config_item_type *cit = &tb->tb_##_name##_cit; \ 56 \ 57 cit->ct_item_ops = _item_ops; \ 58 cit->ct_group_ops = _group_ops; \ 59 cit->ct_attrs = _attrs; \ 60 cit->ct_owner = tb->ops->owner; \ 61 pr_debug("Setup generic %s\n", __stringify(_name)); \ 62 } 63 64 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \ 65 static void target_core_setup_##_name##_cit(struct target_backend *tb) \ 66 { \ 67 struct config_item_type *cit = &tb->tb_##_name##_cit; \ 68 \ 69 cit->ct_item_ops = _item_ops; \ 70 cit->ct_group_ops = _group_ops; \ 71 cit->ct_attrs = tb->ops->tb_##_name##_attrs; \ 72 cit->ct_owner = tb->ops->owner; \ 73 pr_debug("Setup generic %s\n", __stringify(_name)); \ 74 } 75 76 extern struct t10_alua_lu_gp *default_lu_gp; 77 78 static LIST_HEAD(g_tf_list); 79 static DEFINE_MUTEX(g_tf_lock); 80 81 struct target_core_configfs_attribute { 82 struct configfs_attribute attr; 83 ssize_t (*show)(void *, char *); 84 ssize_t (*store)(void *, const char *, size_t); 85 }; 86 87 static struct config_group target_core_hbagroup; 88 static struct config_group alua_group; 89 static struct config_group alua_lu_gps_group; 90 91 static inline struct se_hba * 92 item_to_hba(struct config_item *item) 93 { 94 return container_of(to_config_group(item), struct se_hba, hba_group); 95 } 96 97 /* 98 * Attributes for /sys/kernel/config/target/ 99 */ 100 static ssize_t target_core_attr_show(struct config_item *item, 101 struct configfs_attribute *attr, 102 char *page) 103 { 104 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s" 105 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION, 106 utsname()->sysname, utsname()->machine); 107 } 108 109 static struct configfs_item_operations target_core_fabric_item_ops = { 110 .show_attribute = target_core_attr_show, 111 }; 112 113 static struct configfs_attribute target_core_item_attr_version = { 114 .ca_owner = THIS_MODULE, 115 .ca_name = "version", 116 .ca_mode = S_IRUGO, 117 }; 118 119 static struct target_fabric_configfs *target_core_get_fabric( 120 const char *name) 121 { 122 struct target_fabric_configfs *tf; 123 124 if (!name) 125 return NULL; 126 127 mutex_lock(&g_tf_lock); 128 list_for_each_entry(tf, &g_tf_list, tf_list) { 129 if (!strcmp(tf->tf_ops->name, name)) { 130 atomic_inc(&tf->tf_access_cnt); 131 mutex_unlock(&g_tf_lock); 132 return tf; 133 } 134 } 135 mutex_unlock(&g_tf_lock); 136 137 return NULL; 138 } 139 140 /* 141 * Called from struct target_core_group_ops->make_group() 142 */ 143 static struct config_group *target_core_register_fabric( 144 struct config_group *group, 145 const char *name) 146 { 147 struct target_fabric_configfs *tf; 148 int ret; 149 150 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:" 151 " %s\n", group, name); 152 153 tf = target_core_get_fabric(name); 154 if (!tf) { 155 pr_debug("target_core_register_fabric() trying autoload for %s\n", 156 name); 157 158 /* 159 * Below are some hardcoded request_module() calls to automatically 160 * local fabric modules when the following is called: 161 * 162 * mkdir -p /sys/kernel/config/target/$MODULE_NAME 163 * 164 * Note that this does not limit which TCM fabric module can be 165 * registered, but simply provids auto loading logic for modules with 166 * mkdir(2) system calls with known TCM fabric modules. 167 */ 168 169 if (!strncmp(name, "iscsi", 5)) { 170 /* 171 * Automatically load the LIO Target fabric module when the 172 * following is called: 173 * 174 * mkdir -p $CONFIGFS/target/iscsi 175 */ 176 ret = request_module("iscsi_target_mod"); 177 if (ret < 0) { 178 pr_debug("request_module() failed for" 179 " iscsi_target_mod.ko: %d\n", ret); 180 return ERR_PTR(-EINVAL); 181 } 182 } else if (!strncmp(name, "loopback", 8)) { 183 /* 184 * Automatically load the tcm_loop fabric module when the 185 * following is called: 186 * 187 * mkdir -p $CONFIGFS/target/loopback 188 */ 189 ret = request_module("tcm_loop"); 190 if (ret < 0) { 191 pr_debug("request_module() failed for" 192 " tcm_loop.ko: %d\n", ret); 193 return ERR_PTR(-EINVAL); 194 } 195 } 196 197 tf = target_core_get_fabric(name); 198 } 199 200 if (!tf) { 201 pr_debug("target_core_get_fabric() failed for %s\n", 202 name); 203 return ERR_PTR(-EINVAL); 204 } 205 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:" 206 " %s\n", tf->tf_ops->name); 207 /* 208 * On a successful target_core_get_fabric() look, the returned 209 * struct target_fabric_configfs *tf will contain a usage reference. 210 */ 211 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n", 212 &tf->tf_wwn_cit); 213 214 tf->tf_group.default_groups = tf->tf_default_groups; 215 tf->tf_group.default_groups[0] = &tf->tf_disc_group; 216 tf->tf_group.default_groups[1] = NULL; 217 218 config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit); 219 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth", 220 &tf->tf_discovery_cit); 221 222 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:" 223 " %s\n", tf->tf_group.cg_item.ci_name); 224 return &tf->tf_group; 225 } 226 227 /* 228 * Called from struct target_core_group_ops->drop_item() 229 */ 230 static void target_core_deregister_fabric( 231 struct config_group *group, 232 struct config_item *item) 233 { 234 struct target_fabric_configfs *tf = container_of( 235 to_config_group(item), struct target_fabric_configfs, tf_group); 236 struct config_group *tf_group; 237 struct config_item *df_item; 238 int i; 239 240 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in" 241 " tf list\n", config_item_name(item)); 242 243 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:" 244 " %s\n", tf->tf_ops->name); 245 atomic_dec(&tf->tf_access_cnt); 246 247 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci" 248 " %s\n", config_item_name(item)); 249 250 tf_group = &tf->tf_group; 251 for (i = 0; tf_group->default_groups[i]; i++) { 252 df_item = &tf_group->default_groups[i]->cg_item; 253 tf_group->default_groups[i] = NULL; 254 config_item_put(df_item); 255 } 256 config_item_put(item); 257 } 258 259 static struct configfs_group_operations target_core_fabric_group_ops = { 260 .make_group = &target_core_register_fabric, 261 .drop_item = &target_core_deregister_fabric, 262 }; 263 264 /* 265 * All item attributes appearing in /sys/kernel/target/ appear here. 266 */ 267 static struct configfs_attribute *target_core_fabric_item_attrs[] = { 268 &target_core_item_attr_version, 269 NULL, 270 }; 271 272 /* 273 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/ 274 */ 275 static struct config_item_type target_core_fabrics_item = { 276 .ct_item_ops = &target_core_fabric_item_ops, 277 .ct_group_ops = &target_core_fabric_group_ops, 278 .ct_attrs = target_core_fabric_item_attrs, 279 .ct_owner = THIS_MODULE, 280 }; 281 282 static struct configfs_subsystem target_core_fabrics = { 283 .su_group = { 284 .cg_item = { 285 .ci_namebuf = "target", 286 .ci_type = &target_core_fabrics_item, 287 }, 288 }, 289 }; 290 291 int target_depend_item(struct config_item *item) 292 { 293 return configfs_depend_item(&target_core_fabrics, item); 294 } 295 EXPORT_SYMBOL(target_depend_item); 296 297 void target_undepend_item(struct config_item *item) 298 { 299 return configfs_undepend_item(&target_core_fabrics, item); 300 } 301 EXPORT_SYMBOL(target_undepend_item); 302 303 /*############################################################################## 304 // Start functions called by external Target Fabrics Modules 305 //############################################################################*/ 306 307 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo) 308 { 309 if (!tfo->name) { 310 pr_err("Missing tfo->name\n"); 311 return -EINVAL; 312 } 313 if (strlen(tfo->name) >= TARGET_FABRIC_NAME_SIZE) { 314 pr_err("Passed name: %s exceeds TARGET_FABRIC" 315 "_NAME_SIZE\n", tfo->name); 316 return -EINVAL; 317 } 318 if (!tfo->get_fabric_name) { 319 pr_err("Missing tfo->get_fabric_name()\n"); 320 return -EINVAL; 321 } 322 if (!tfo->tpg_get_wwn) { 323 pr_err("Missing tfo->tpg_get_wwn()\n"); 324 return -EINVAL; 325 } 326 if (!tfo->tpg_get_tag) { 327 pr_err("Missing tfo->tpg_get_tag()\n"); 328 return -EINVAL; 329 } 330 if (!tfo->tpg_check_demo_mode) { 331 pr_err("Missing tfo->tpg_check_demo_mode()\n"); 332 return -EINVAL; 333 } 334 if (!tfo->tpg_check_demo_mode_cache) { 335 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n"); 336 return -EINVAL; 337 } 338 if (!tfo->tpg_check_demo_mode_write_protect) { 339 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n"); 340 return -EINVAL; 341 } 342 if (!tfo->tpg_check_prod_mode_write_protect) { 343 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n"); 344 return -EINVAL; 345 } 346 if (!tfo->tpg_get_inst_index) { 347 pr_err("Missing tfo->tpg_get_inst_index()\n"); 348 return -EINVAL; 349 } 350 if (!tfo->release_cmd) { 351 pr_err("Missing tfo->release_cmd()\n"); 352 return -EINVAL; 353 } 354 if (!tfo->shutdown_session) { 355 pr_err("Missing tfo->shutdown_session()\n"); 356 return -EINVAL; 357 } 358 if (!tfo->close_session) { 359 pr_err("Missing tfo->close_session()\n"); 360 return -EINVAL; 361 } 362 if (!tfo->sess_get_index) { 363 pr_err("Missing tfo->sess_get_index()\n"); 364 return -EINVAL; 365 } 366 if (!tfo->write_pending) { 367 pr_err("Missing tfo->write_pending()\n"); 368 return -EINVAL; 369 } 370 if (!tfo->write_pending_status) { 371 pr_err("Missing tfo->write_pending_status()\n"); 372 return -EINVAL; 373 } 374 if (!tfo->set_default_node_attributes) { 375 pr_err("Missing tfo->set_default_node_attributes()\n"); 376 return -EINVAL; 377 } 378 if (!tfo->get_cmd_state) { 379 pr_err("Missing tfo->get_cmd_state()\n"); 380 return -EINVAL; 381 } 382 if (!tfo->queue_data_in) { 383 pr_err("Missing tfo->queue_data_in()\n"); 384 return -EINVAL; 385 } 386 if (!tfo->queue_status) { 387 pr_err("Missing tfo->queue_status()\n"); 388 return -EINVAL; 389 } 390 if (!tfo->queue_tm_rsp) { 391 pr_err("Missing tfo->queue_tm_rsp()\n"); 392 return -EINVAL; 393 } 394 if (!tfo->aborted_task) { 395 pr_err("Missing tfo->aborted_task()\n"); 396 return -EINVAL; 397 } 398 /* 399 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn() 400 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in 401 * target_core_fabric_configfs.c WWN+TPG group context code. 402 */ 403 if (!tfo->fabric_make_wwn) { 404 pr_err("Missing tfo->fabric_make_wwn()\n"); 405 return -EINVAL; 406 } 407 if (!tfo->fabric_drop_wwn) { 408 pr_err("Missing tfo->fabric_drop_wwn()\n"); 409 return -EINVAL; 410 } 411 if (!tfo->fabric_make_tpg) { 412 pr_err("Missing tfo->fabric_make_tpg()\n"); 413 return -EINVAL; 414 } 415 if (!tfo->fabric_drop_tpg) { 416 pr_err("Missing tfo->fabric_drop_tpg()\n"); 417 return -EINVAL; 418 } 419 420 return 0; 421 } 422 423 int target_register_template(const struct target_core_fabric_ops *fo) 424 { 425 struct target_fabric_configfs *tf; 426 int ret; 427 428 ret = target_fabric_tf_ops_check(fo); 429 if (ret) 430 return ret; 431 432 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL); 433 if (!tf) { 434 pr_err("%s: could not allocate memory!\n", __func__); 435 return -ENOMEM; 436 } 437 438 INIT_LIST_HEAD(&tf->tf_list); 439 atomic_set(&tf->tf_access_cnt, 0); 440 tf->tf_ops = fo; 441 target_fabric_setup_cits(tf); 442 443 mutex_lock(&g_tf_lock); 444 list_add_tail(&tf->tf_list, &g_tf_list); 445 mutex_unlock(&g_tf_lock); 446 447 return 0; 448 } 449 EXPORT_SYMBOL(target_register_template); 450 451 void target_unregister_template(const struct target_core_fabric_ops *fo) 452 { 453 struct target_fabric_configfs *t; 454 455 mutex_lock(&g_tf_lock); 456 list_for_each_entry(t, &g_tf_list, tf_list) { 457 if (!strcmp(t->tf_ops->name, fo->name)) { 458 BUG_ON(atomic_read(&t->tf_access_cnt)); 459 list_del(&t->tf_list); 460 kfree(t); 461 break; 462 } 463 } 464 mutex_unlock(&g_tf_lock); 465 } 466 EXPORT_SYMBOL(target_unregister_template); 467 468 /*############################################################################## 469 // Stop functions called by external Target Fabrics Modules 470 //############################################################################*/ 471 472 /* Start functions for struct config_item_type tb_dev_attrib_cit */ 473 #define DEF_TB_DEV_ATTRIB_SHOW(_name) \ 474 static ssize_t show_##_name(struct se_dev_attrib *da, char *page) \ 475 { \ 476 return snprintf(page, PAGE_SIZE, "%u\n", da->_name); \ 477 } 478 479 DEF_TB_DEV_ATTRIB_SHOW(emulate_model_alias); 480 DEF_TB_DEV_ATTRIB_SHOW(emulate_dpo); 481 DEF_TB_DEV_ATTRIB_SHOW(emulate_fua_write); 482 DEF_TB_DEV_ATTRIB_SHOW(emulate_fua_read); 483 DEF_TB_DEV_ATTRIB_SHOW(emulate_write_cache); 484 DEF_TB_DEV_ATTRIB_SHOW(emulate_ua_intlck_ctrl); 485 DEF_TB_DEV_ATTRIB_SHOW(emulate_tas); 486 DEF_TB_DEV_ATTRIB_SHOW(emulate_tpu); 487 DEF_TB_DEV_ATTRIB_SHOW(emulate_tpws); 488 DEF_TB_DEV_ATTRIB_SHOW(emulate_caw); 489 DEF_TB_DEV_ATTRIB_SHOW(emulate_3pc); 490 DEF_TB_DEV_ATTRIB_SHOW(pi_prot_type); 491 DEF_TB_DEV_ATTRIB_SHOW(hw_pi_prot_type); 492 DEF_TB_DEV_ATTRIB_SHOW(pi_prot_format); 493 DEF_TB_DEV_ATTRIB_SHOW(enforce_pr_isids); 494 DEF_TB_DEV_ATTRIB_SHOW(is_nonrot); 495 DEF_TB_DEV_ATTRIB_SHOW(emulate_rest_reord); 496 DEF_TB_DEV_ATTRIB_SHOW(force_pr_aptpl); 497 DEF_TB_DEV_ATTRIB_SHOW(hw_block_size); 498 DEF_TB_DEV_ATTRIB_SHOW(block_size); 499 DEF_TB_DEV_ATTRIB_SHOW(hw_max_sectors); 500 DEF_TB_DEV_ATTRIB_SHOW(optimal_sectors); 501 DEF_TB_DEV_ATTRIB_SHOW(hw_queue_depth); 502 DEF_TB_DEV_ATTRIB_SHOW(queue_depth); 503 DEF_TB_DEV_ATTRIB_SHOW(max_unmap_lba_count); 504 DEF_TB_DEV_ATTRIB_SHOW(max_unmap_block_desc_count); 505 DEF_TB_DEV_ATTRIB_SHOW(unmap_granularity); 506 DEF_TB_DEV_ATTRIB_SHOW(unmap_granularity_alignment); 507 DEF_TB_DEV_ATTRIB_SHOW(max_write_same_len); 508 509 #define DEF_TB_DEV_ATTRIB_STORE_U32(_name) \ 510 static ssize_t store_##_name(struct se_dev_attrib *da, const char *page,\ 511 size_t count) \ 512 { \ 513 u32 val; \ 514 int ret; \ 515 \ 516 ret = kstrtou32(page, 0, &val); \ 517 if (ret < 0) \ 518 return ret; \ 519 da->_name = val; \ 520 return count; \ 521 } 522 523 DEF_TB_DEV_ATTRIB_STORE_U32(max_unmap_lba_count); 524 DEF_TB_DEV_ATTRIB_STORE_U32(max_unmap_block_desc_count); 525 DEF_TB_DEV_ATTRIB_STORE_U32(unmap_granularity); 526 DEF_TB_DEV_ATTRIB_STORE_U32(unmap_granularity_alignment); 527 DEF_TB_DEV_ATTRIB_STORE_U32(max_write_same_len); 528 529 #define DEF_TB_DEV_ATTRIB_STORE_BOOL(_name) \ 530 static ssize_t store_##_name(struct se_dev_attrib *da, const char *page,\ 531 size_t count) \ 532 { \ 533 bool flag; \ 534 int ret; \ 535 \ 536 ret = strtobool(page, &flag); \ 537 if (ret < 0) \ 538 return ret; \ 539 da->_name = flag; \ 540 return count; \ 541 } 542 543 DEF_TB_DEV_ATTRIB_STORE_BOOL(emulate_fua_write); 544 DEF_TB_DEV_ATTRIB_STORE_BOOL(emulate_caw); 545 DEF_TB_DEV_ATTRIB_STORE_BOOL(emulate_3pc); 546 DEF_TB_DEV_ATTRIB_STORE_BOOL(enforce_pr_isids); 547 DEF_TB_DEV_ATTRIB_STORE_BOOL(is_nonrot); 548 549 #define DEF_TB_DEV_ATTRIB_STORE_STUB(_name) \ 550 static ssize_t store_##_name(struct se_dev_attrib *da, const char *page,\ 551 size_t count) \ 552 { \ 553 printk_once(KERN_WARNING \ 554 "ignoring deprecated ##_name## attribute\n"); \ 555 return count; \ 556 } 557 558 DEF_TB_DEV_ATTRIB_STORE_STUB(emulate_dpo); 559 DEF_TB_DEV_ATTRIB_STORE_STUB(emulate_fua_read); 560 561 static void dev_set_t10_wwn_model_alias(struct se_device *dev) 562 { 563 const char *configname; 564 565 configname = config_item_name(&dev->dev_group.cg_item); 566 if (strlen(configname) >= 16) { 567 pr_warn("dev[%p]: Backstore name '%s' is too long for " 568 "INQUIRY_MODEL, truncating to 16 bytes\n", dev, 569 configname); 570 } 571 snprintf(&dev->t10_wwn.model[0], 16, "%s", configname); 572 } 573 574 static ssize_t store_emulate_model_alias(struct se_dev_attrib *da, 575 const char *page, size_t count) 576 { 577 struct se_device *dev = da->da_dev; 578 bool flag; 579 int ret; 580 581 if (dev->export_count) { 582 pr_err("dev[%p]: Unable to change model alias" 583 " while export_count is %d\n", 584 dev, dev->export_count); 585 return -EINVAL; 586 } 587 588 ret = strtobool(page, &flag); 589 if (ret < 0) 590 return ret; 591 592 if (flag) { 593 dev_set_t10_wwn_model_alias(dev); 594 } else { 595 strncpy(&dev->t10_wwn.model[0], 596 dev->transport->inquiry_prod, 16); 597 } 598 da->emulate_model_alias = flag; 599 return count; 600 } 601 602 static ssize_t store_emulate_write_cache(struct se_dev_attrib *da, 603 const char *page, size_t count) 604 { 605 bool flag; 606 int ret; 607 608 ret = strtobool(page, &flag); 609 if (ret < 0) 610 return ret; 611 612 if (flag && da->da_dev->transport->get_write_cache) { 613 pr_err("emulate_write_cache not supported for this device\n"); 614 return -EINVAL; 615 } 616 617 da->emulate_write_cache = flag; 618 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 619 da->da_dev, flag); 620 return count; 621 } 622 623 static ssize_t store_emulate_ua_intlck_ctrl(struct se_dev_attrib *da, 624 const char *page, size_t count) 625 { 626 u32 val; 627 int ret; 628 629 ret = kstrtou32(page, 0, &val); 630 if (ret < 0) 631 return ret; 632 633 if (val != 0 && val != 1 && val != 2) { 634 pr_err("Illegal value %d\n", val); 635 return -EINVAL; 636 } 637 638 if (da->da_dev->export_count) { 639 pr_err("dev[%p]: Unable to change SE Device" 640 " UA_INTRLCK_CTRL while export_count is %d\n", 641 da->da_dev, da->da_dev->export_count); 642 return -EINVAL; 643 } 644 da->emulate_ua_intlck_ctrl = val; 645 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 646 da->da_dev, val); 647 return count; 648 } 649 650 static ssize_t store_emulate_tas(struct se_dev_attrib *da, 651 const char *page, size_t count) 652 { 653 bool flag; 654 int ret; 655 656 ret = strtobool(page, &flag); 657 if (ret < 0) 658 return ret; 659 660 if (da->da_dev->export_count) { 661 pr_err("dev[%p]: Unable to change SE Device TAS while" 662 " export_count is %d\n", 663 da->da_dev, da->da_dev->export_count); 664 return -EINVAL; 665 } 666 da->emulate_tas = flag; 667 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 668 da->da_dev, flag ? "Enabled" : "Disabled"); 669 670 return count; 671 } 672 673 static ssize_t store_emulate_tpu(struct se_dev_attrib *da, 674 const char *page, size_t count) 675 { 676 bool flag; 677 int ret; 678 679 ret = strtobool(page, &flag); 680 if (ret < 0) 681 return ret; 682 683 /* 684 * We expect this value to be non-zero when generic Block Layer 685 * Discard supported is detected iblock_create_virtdevice(). 686 */ 687 if (flag && !da->max_unmap_block_desc_count) { 688 pr_err("Generic Block Discard not supported\n"); 689 return -ENOSYS; 690 } 691 692 da->emulate_tpu = flag; 693 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 694 da->da_dev, flag); 695 return count; 696 } 697 698 static ssize_t store_emulate_tpws(struct se_dev_attrib *da, 699 const char *page, size_t count) 700 { 701 bool flag; 702 int ret; 703 704 ret = strtobool(page, &flag); 705 if (ret < 0) 706 return ret; 707 708 /* 709 * We expect this value to be non-zero when generic Block Layer 710 * Discard supported is detected iblock_create_virtdevice(). 711 */ 712 if (flag && !da->max_unmap_block_desc_count) { 713 pr_err("Generic Block Discard not supported\n"); 714 return -ENOSYS; 715 } 716 717 da->emulate_tpws = flag; 718 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 719 da->da_dev, flag); 720 return count; 721 } 722 723 static ssize_t store_pi_prot_type(struct se_dev_attrib *da, 724 const char *page, size_t count) 725 { 726 int old_prot = da->pi_prot_type, ret; 727 struct se_device *dev = da->da_dev; 728 u32 flag; 729 730 ret = kstrtou32(page, 0, &flag); 731 if (ret < 0) 732 return ret; 733 734 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) { 735 pr_err("Illegal value %d for pi_prot_type\n", flag); 736 return -EINVAL; 737 } 738 if (flag == 2) { 739 pr_err("DIF TYPE2 protection currently not supported\n"); 740 return -ENOSYS; 741 } 742 if (da->hw_pi_prot_type) { 743 pr_warn("DIF protection enabled on underlying hardware," 744 " ignoring\n"); 745 return count; 746 } 747 if (!dev->transport->init_prot || !dev->transport->free_prot) { 748 /* 0 is only allowed value for non-supporting backends */ 749 if (flag == 0) 750 return count; 751 752 pr_err("DIF protection not supported by backend: %s\n", 753 dev->transport->name); 754 return -ENOSYS; 755 } 756 if (!(dev->dev_flags & DF_CONFIGURED)) { 757 pr_err("DIF protection requires device to be configured\n"); 758 return -ENODEV; 759 } 760 if (dev->export_count) { 761 pr_err("dev[%p]: Unable to change SE Device PROT type while" 762 " export_count is %d\n", dev, dev->export_count); 763 return -EINVAL; 764 } 765 766 da->pi_prot_type = flag; 767 768 if (flag && !old_prot) { 769 ret = dev->transport->init_prot(dev); 770 if (ret) { 771 da->pi_prot_type = old_prot; 772 return ret; 773 } 774 775 } else if (!flag && old_prot) { 776 dev->transport->free_prot(dev); 777 } 778 779 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag); 780 return count; 781 } 782 783 static ssize_t store_pi_prot_format(struct se_dev_attrib *da, 784 const char *page, size_t count) 785 { 786 struct se_device *dev = da->da_dev; 787 bool flag; 788 int ret; 789 790 ret = strtobool(page, &flag); 791 if (ret < 0) 792 return ret; 793 794 if (!flag) 795 return count; 796 797 if (!dev->transport->format_prot) { 798 pr_err("DIF protection format not supported by backend %s\n", 799 dev->transport->name); 800 return -ENOSYS; 801 } 802 if (!(dev->dev_flags & DF_CONFIGURED)) { 803 pr_err("DIF protection format requires device to be configured\n"); 804 return -ENODEV; 805 } 806 if (dev->export_count) { 807 pr_err("dev[%p]: Unable to format SE Device PROT type while" 808 " export_count is %d\n", dev, dev->export_count); 809 return -EINVAL; 810 } 811 812 ret = dev->transport->format_prot(dev); 813 if (ret) 814 return ret; 815 816 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev); 817 return count; 818 } 819 820 static ssize_t store_force_pr_aptpl(struct se_dev_attrib *da, 821 const char *page, size_t count) 822 { 823 bool flag; 824 int ret; 825 826 ret = strtobool(page, &flag); 827 if (ret < 0) 828 return ret; 829 if (da->da_dev->export_count) { 830 pr_err("dev[%p]: Unable to set force_pr_aptpl while" 831 " export_count is %d\n", 832 da->da_dev, da->da_dev->export_count); 833 return -EINVAL; 834 } 835 836 da->force_pr_aptpl = flag; 837 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag); 838 return count; 839 } 840 841 static ssize_t store_emulate_rest_reord(struct se_dev_attrib *da, 842 const char *page, size_t count) 843 { 844 bool flag; 845 int ret; 846 847 ret = strtobool(page, &flag); 848 if (ret < 0) 849 return ret; 850 851 if (flag != 0) { 852 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted" 853 " reordering not implemented\n", da->da_dev); 854 return -ENOSYS; 855 } 856 da->emulate_rest_reord = flag; 857 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", 858 da->da_dev, flag); 859 return count; 860 } 861 862 /* 863 * Note, this can only be called on unexported SE Device Object. 864 */ 865 static ssize_t store_queue_depth(struct se_dev_attrib *da, 866 const char *page, size_t count) 867 { 868 struct se_device *dev = da->da_dev; 869 u32 val; 870 int ret; 871 872 ret = kstrtou32(page, 0, &val); 873 if (ret < 0) 874 return ret; 875 876 if (dev->export_count) { 877 pr_err("dev[%p]: Unable to change SE Device TCQ while" 878 " export_count is %d\n", 879 dev, dev->export_count); 880 return -EINVAL; 881 } 882 if (!val) { 883 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev); 884 return -EINVAL; 885 } 886 887 if (val > dev->dev_attrib.queue_depth) { 888 if (val > dev->dev_attrib.hw_queue_depth) { 889 pr_err("dev[%p]: Passed queue_depth:" 890 " %u exceeds TCM/SE_Device MAX" 891 " TCQ: %u\n", dev, val, 892 dev->dev_attrib.hw_queue_depth); 893 return -EINVAL; 894 } 895 } 896 da->queue_depth = dev->queue_depth = val; 897 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val); 898 return count; 899 } 900 901 static ssize_t store_optimal_sectors(struct se_dev_attrib *da, 902 const char *page, size_t count) 903 { 904 u32 val; 905 int ret; 906 907 ret = kstrtou32(page, 0, &val); 908 if (ret < 0) 909 return ret; 910 911 if (da->da_dev->export_count) { 912 pr_err("dev[%p]: Unable to change SE Device" 913 " optimal_sectors while export_count is %d\n", 914 da->da_dev, da->da_dev->export_count); 915 return -EINVAL; 916 } 917 if (val > da->hw_max_sectors) { 918 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 919 " greater than hw_max_sectors: %u\n", 920 da->da_dev, val, da->hw_max_sectors); 921 return -EINVAL; 922 } 923 924 da->optimal_sectors = val; 925 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 926 da->da_dev, val); 927 return count; 928 } 929 930 static ssize_t store_block_size(struct se_dev_attrib *da, 931 const char *page, size_t count) 932 { 933 u32 val; 934 int ret; 935 936 ret = kstrtou32(page, 0, &val); 937 if (ret < 0) 938 return ret; 939 940 if (da->da_dev->export_count) { 941 pr_err("dev[%p]: Unable to change SE Device block_size" 942 " while export_count is %d\n", 943 da->da_dev, da->da_dev->export_count); 944 return -EINVAL; 945 } 946 947 if (val != 512 && val != 1024 && val != 2048 && val != 4096) { 948 pr_err("dev[%p]: Illegal value for block_device: %u" 949 " for SE device, must be 512, 1024, 2048 or 4096\n", 950 da->da_dev, val); 951 return -EINVAL; 952 } 953 954 da->block_size = val; 955 if (da->max_bytes_per_io) 956 da->hw_max_sectors = da->max_bytes_per_io / val; 957 958 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 959 da->da_dev, val); 960 return count; 961 } 962 963 CONFIGFS_EATTR_STRUCT(target_backend_dev_attrib, se_dev_attrib); 964 #define TB_DEV_ATTR(_backend, _name, _mode) \ 965 static struct target_backend_dev_attrib_attribute _backend##_dev_attrib_##_name = \ 966 __CONFIGFS_EATTR(_name, _mode, \ 967 show_##_name, \ 968 store_##_name); 969 970 #define TB_DEV_ATTR_RO(_backend, _name) \ 971 static struct target_backend_dev_attrib_attribute _backend##_dev_attrib_##_name = \ 972 __CONFIGFS_EATTR_RO(_name, \ 973 show_##_name); 974 975 TB_DEV_ATTR(target_core, emulate_model_alias, S_IRUGO | S_IWUSR); 976 TB_DEV_ATTR(target_core, emulate_dpo, S_IRUGO | S_IWUSR); 977 TB_DEV_ATTR(target_core, emulate_fua_write, S_IRUGO | S_IWUSR); 978 TB_DEV_ATTR(target_core, emulate_fua_read, S_IRUGO | S_IWUSR); 979 TB_DEV_ATTR(target_core, emulate_write_cache, S_IRUGO | S_IWUSR); 980 TB_DEV_ATTR(target_core, emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR); 981 TB_DEV_ATTR(target_core, emulate_tas, S_IRUGO | S_IWUSR); 982 TB_DEV_ATTR(target_core, emulate_tpu, S_IRUGO | S_IWUSR); 983 TB_DEV_ATTR(target_core, emulate_tpws, S_IRUGO | S_IWUSR); 984 TB_DEV_ATTR(target_core, emulate_caw, S_IRUGO | S_IWUSR); 985 TB_DEV_ATTR(target_core, emulate_3pc, S_IRUGO | S_IWUSR); 986 TB_DEV_ATTR(target_core, pi_prot_type, S_IRUGO | S_IWUSR); 987 TB_DEV_ATTR_RO(target_core, hw_pi_prot_type); 988 TB_DEV_ATTR(target_core, pi_prot_format, S_IRUGO | S_IWUSR); 989 TB_DEV_ATTR(target_core, enforce_pr_isids, S_IRUGO | S_IWUSR); 990 TB_DEV_ATTR(target_core, is_nonrot, S_IRUGO | S_IWUSR); 991 TB_DEV_ATTR(target_core, emulate_rest_reord, S_IRUGO | S_IWUSR); 992 TB_DEV_ATTR(target_core, force_pr_aptpl, S_IRUGO | S_IWUSR) 993 TB_DEV_ATTR_RO(target_core, hw_block_size); 994 TB_DEV_ATTR(target_core, block_size, S_IRUGO | S_IWUSR) 995 TB_DEV_ATTR_RO(target_core, hw_max_sectors); 996 TB_DEV_ATTR(target_core, optimal_sectors, S_IRUGO | S_IWUSR); 997 TB_DEV_ATTR_RO(target_core, hw_queue_depth); 998 TB_DEV_ATTR(target_core, queue_depth, S_IRUGO | S_IWUSR); 999 TB_DEV_ATTR(target_core, max_unmap_lba_count, S_IRUGO | S_IWUSR); 1000 TB_DEV_ATTR(target_core, max_unmap_block_desc_count, S_IRUGO | S_IWUSR); 1001 TB_DEV_ATTR(target_core, unmap_granularity, S_IRUGO | S_IWUSR); 1002 TB_DEV_ATTR(target_core, unmap_granularity_alignment, S_IRUGO | S_IWUSR); 1003 TB_DEV_ATTR(target_core, max_write_same_len, S_IRUGO | S_IWUSR); 1004 1005 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib); 1006 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group); 1007 1008 /* 1009 * dev_attrib attributes for devices using the target core SBC/SPC 1010 * interpreter. Any backend using spc_parse_cdb should be using 1011 * these. 1012 */ 1013 struct configfs_attribute *sbc_attrib_attrs[] = { 1014 &target_core_dev_attrib_emulate_model_alias.attr, 1015 &target_core_dev_attrib_emulate_dpo.attr, 1016 &target_core_dev_attrib_emulate_fua_write.attr, 1017 &target_core_dev_attrib_emulate_fua_read.attr, 1018 &target_core_dev_attrib_emulate_write_cache.attr, 1019 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr, 1020 &target_core_dev_attrib_emulate_tas.attr, 1021 &target_core_dev_attrib_emulate_tpu.attr, 1022 &target_core_dev_attrib_emulate_tpws.attr, 1023 &target_core_dev_attrib_emulate_caw.attr, 1024 &target_core_dev_attrib_emulate_3pc.attr, 1025 &target_core_dev_attrib_pi_prot_type.attr, 1026 &target_core_dev_attrib_hw_pi_prot_type.attr, 1027 &target_core_dev_attrib_pi_prot_format.attr, 1028 &target_core_dev_attrib_enforce_pr_isids.attr, 1029 &target_core_dev_attrib_is_nonrot.attr, 1030 &target_core_dev_attrib_emulate_rest_reord.attr, 1031 &target_core_dev_attrib_force_pr_aptpl.attr, 1032 &target_core_dev_attrib_hw_block_size.attr, 1033 &target_core_dev_attrib_block_size.attr, 1034 &target_core_dev_attrib_hw_max_sectors.attr, 1035 &target_core_dev_attrib_optimal_sectors.attr, 1036 &target_core_dev_attrib_hw_queue_depth.attr, 1037 &target_core_dev_attrib_queue_depth.attr, 1038 &target_core_dev_attrib_max_unmap_lba_count.attr, 1039 &target_core_dev_attrib_max_unmap_block_desc_count.attr, 1040 &target_core_dev_attrib_unmap_granularity.attr, 1041 &target_core_dev_attrib_unmap_granularity_alignment.attr, 1042 &target_core_dev_attrib_max_write_same_len.attr, 1043 NULL, 1044 }; 1045 EXPORT_SYMBOL(sbc_attrib_attrs); 1046 1047 TB_DEV_ATTR_RO(target_pt, hw_pi_prot_type); 1048 TB_DEV_ATTR_RO(target_pt, hw_block_size); 1049 TB_DEV_ATTR_RO(target_pt, hw_max_sectors); 1050 TB_DEV_ATTR_RO(target_pt, hw_queue_depth); 1051 1052 /* 1053 * Minimal dev_attrib attributes for devices passing through CDBs. 1054 * In this case we only provide a few read-only attributes for 1055 * backwards compatibility. 1056 */ 1057 struct configfs_attribute *passthrough_attrib_attrs[] = { 1058 &target_pt_dev_attrib_hw_pi_prot_type.attr, 1059 &target_pt_dev_attrib_hw_block_size.attr, 1060 &target_pt_dev_attrib_hw_max_sectors.attr, 1061 &target_pt_dev_attrib_hw_queue_depth.attr, 1062 NULL, 1063 }; 1064 EXPORT_SYMBOL(passthrough_attrib_attrs); 1065 1066 static struct configfs_item_operations target_core_dev_attrib_ops = { 1067 .show_attribute = target_core_dev_attrib_attr_show, 1068 .store_attribute = target_core_dev_attrib_attr_store, 1069 }; 1070 1071 TB_CIT_SETUP_DRV(dev_attrib, &target_core_dev_attrib_ops, NULL); 1072 1073 /* End functions for struct config_item_type tb_dev_attrib_cit */ 1074 1075 /* Start functions for struct config_item_type tb_dev_wwn_cit */ 1076 1077 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn); 1078 #define SE_DEV_WWN_ATTR(_name, _mode) \ 1079 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \ 1080 __CONFIGFS_EATTR(_name, _mode, \ 1081 target_core_dev_wwn_show_attr_##_name, \ 1082 target_core_dev_wwn_store_attr_##_name); 1083 1084 #define SE_DEV_WWN_ATTR_RO(_name); \ 1085 do { \ 1086 static struct target_core_dev_wwn_attribute \ 1087 target_core_dev_wwn_##_name = \ 1088 __CONFIGFS_EATTR_RO(_name, \ 1089 target_core_dev_wwn_show_attr_##_name); \ 1090 } while (0); 1091 1092 /* 1093 * VPD page 0x80 Unit serial 1094 */ 1095 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial( 1096 struct t10_wwn *t10_wwn, 1097 char *page) 1098 { 1099 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 1100 &t10_wwn->unit_serial[0]); 1101 } 1102 1103 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial( 1104 struct t10_wwn *t10_wwn, 1105 const char *page, 1106 size_t count) 1107 { 1108 struct se_device *dev = t10_wwn->t10_dev; 1109 unsigned char buf[INQUIRY_VPD_SERIAL_LEN]; 1110 1111 /* 1112 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 1113 * from the struct scsi_device level firmware, do not allow 1114 * VPD Unit Serial to be emulated. 1115 * 1116 * Note this struct scsi_device could also be emulating VPD 1117 * information from its drivers/scsi LLD. But for now we assume 1118 * it is doing 'the right thing' wrt a world wide unique 1119 * VPD Unit Serial Number that OS dependent multipath can depend on. 1120 */ 1121 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) { 1122 pr_err("Underlying SCSI device firmware provided VPD" 1123 " Unit Serial, ignoring request\n"); 1124 return -EOPNOTSUPP; 1125 } 1126 1127 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 1128 pr_err("Emulated VPD Unit Serial exceeds" 1129 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 1130 return -EOVERFLOW; 1131 } 1132 /* 1133 * Check to see if any active $FABRIC_MOD exports exist. If they 1134 * do exist, fail here as changing this information on the fly 1135 * (underneath the initiator side OS dependent multipath code) 1136 * could cause negative effects. 1137 */ 1138 if (dev->export_count) { 1139 pr_err("Unable to set VPD Unit Serial while" 1140 " active %d $FABRIC_MOD exports exist\n", 1141 dev->export_count); 1142 return -EINVAL; 1143 } 1144 1145 /* 1146 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 1147 * 1148 * Also, strip any newline added from the userspace 1149 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 1150 */ 1151 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN); 1152 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 1153 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 1154 "%s", strstrip(buf)); 1155 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL; 1156 1157 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 1158 " %s\n", dev->t10_wwn.unit_serial); 1159 1160 return count; 1161 } 1162 1163 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR); 1164 1165 /* 1166 * VPD page 0x83 Protocol Identifier 1167 */ 1168 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier( 1169 struct t10_wwn *t10_wwn, 1170 char *page) 1171 { 1172 struct t10_vpd *vpd; 1173 unsigned char buf[VPD_TMP_BUF_SIZE]; 1174 ssize_t len = 0; 1175 1176 memset(buf, 0, VPD_TMP_BUF_SIZE); 1177 1178 spin_lock(&t10_wwn->t10_vpd_lock); 1179 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 1180 if (!vpd->protocol_identifier_set) 1181 continue; 1182 1183 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 1184 1185 if (len + strlen(buf) >= PAGE_SIZE) 1186 break; 1187 1188 len += sprintf(page+len, "%s", buf); 1189 } 1190 spin_unlock(&t10_wwn->t10_vpd_lock); 1191 1192 return len; 1193 } 1194 1195 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier( 1196 struct t10_wwn *t10_wwn, 1197 const char *page, 1198 size_t count) 1199 { 1200 return -ENOSYS; 1201 } 1202 1203 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR); 1204 1205 /* 1206 * Generic wrapper for dumping VPD identifiers by association. 1207 */ 1208 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 1209 static ssize_t target_core_dev_wwn_show_attr_##_name( \ 1210 struct t10_wwn *t10_wwn, \ 1211 char *page) \ 1212 { \ 1213 struct t10_vpd *vpd; \ 1214 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 1215 ssize_t len = 0; \ 1216 \ 1217 spin_lock(&t10_wwn->t10_vpd_lock); \ 1218 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 1219 if (vpd->association != _assoc) \ 1220 continue; \ 1221 \ 1222 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1223 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 1224 if (len + strlen(buf) >= PAGE_SIZE) \ 1225 break; \ 1226 len += sprintf(page+len, "%s", buf); \ 1227 \ 1228 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1229 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 1230 if (len + strlen(buf) >= PAGE_SIZE) \ 1231 break; \ 1232 len += sprintf(page+len, "%s", buf); \ 1233 \ 1234 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1235 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 1236 if (len + strlen(buf) >= PAGE_SIZE) \ 1237 break; \ 1238 len += sprintf(page+len, "%s", buf); \ 1239 } \ 1240 spin_unlock(&t10_wwn->t10_vpd_lock); \ 1241 \ 1242 return len; \ 1243 } 1244 1245 /* 1246 * VPD page 0x83 Association: Logical Unit 1247 */ 1248 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 1249 1250 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit( 1251 struct t10_wwn *t10_wwn, 1252 const char *page, 1253 size_t count) 1254 { 1255 return -ENOSYS; 1256 } 1257 1258 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR); 1259 1260 /* 1261 * VPD page 0x83 Association: Target Port 1262 */ 1263 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 1264 1265 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port( 1266 struct t10_wwn *t10_wwn, 1267 const char *page, 1268 size_t count) 1269 { 1270 return -ENOSYS; 1271 } 1272 1273 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR); 1274 1275 /* 1276 * VPD page 0x83 Association: SCSI Target Device 1277 */ 1278 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 1279 1280 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device( 1281 struct t10_wwn *t10_wwn, 1282 const char *page, 1283 size_t count) 1284 { 1285 return -ENOSYS; 1286 } 1287 1288 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR); 1289 1290 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group); 1291 1292 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 1293 &target_core_dev_wwn_vpd_unit_serial.attr, 1294 &target_core_dev_wwn_vpd_protocol_identifier.attr, 1295 &target_core_dev_wwn_vpd_assoc_logical_unit.attr, 1296 &target_core_dev_wwn_vpd_assoc_target_port.attr, 1297 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr, 1298 NULL, 1299 }; 1300 1301 static struct configfs_item_operations target_core_dev_wwn_ops = { 1302 .show_attribute = target_core_dev_wwn_attr_show, 1303 .store_attribute = target_core_dev_wwn_attr_store, 1304 }; 1305 1306 TB_CIT_SETUP(dev_wwn, &target_core_dev_wwn_ops, NULL, target_core_dev_wwn_attrs); 1307 1308 /* End functions for struct config_item_type tb_dev_wwn_cit */ 1309 1310 /* Start functions for struct config_item_type tb_dev_pr_cit */ 1311 1312 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device); 1313 #define SE_DEV_PR_ATTR(_name, _mode) \ 1314 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 1315 __CONFIGFS_EATTR(_name, _mode, \ 1316 target_core_dev_pr_show_attr_##_name, \ 1317 target_core_dev_pr_store_attr_##_name); 1318 1319 #define SE_DEV_PR_ATTR_RO(_name); \ 1320 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 1321 __CONFIGFS_EATTR_RO(_name, \ 1322 target_core_dev_pr_show_attr_##_name); 1323 1324 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev, 1325 char *page) 1326 { 1327 struct se_node_acl *se_nacl; 1328 struct t10_pr_registration *pr_reg; 1329 char i_buf[PR_REG_ISID_ID_LEN]; 1330 1331 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1332 1333 pr_reg = dev->dev_pr_res_holder; 1334 if (!pr_reg) 1335 return sprintf(page, "No SPC-3 Reservation holder\n"); 1336 1337 se_nacl = pr_reg->pr_reg_nacl; 1338 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1339 1340 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", 1341 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 1342 se_nacl->initiatorname, i_buf); 1343 } 1344 1345 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, 1346 char *page) 1347 { 1348 struct se_node_acl *se_nacl; 1349 ssize_t len; 1350 1351 se_nacl = dev->dev_reserved_node_acl; 1352 if (se_nacl) { 1353 len = sprintf(page, 1354 "SPC-2 Reservation: %s Initiator: %s\n", 1355 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 1356 se_nacl->initiatorname); 1357 } else { 1358 len = sprintf(page, "No SPC-2 Reservation holder\n"); 1359 } 1360 return len; 1361 } 1362 1363 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev, 1364 char *page) 1365 { 1366 int ret; 1367 1368 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) 1369 return sprintf(page, "Passthrough\n"); 1370 1371 spin_lock(&dev->dev_reservation_lock); 1372 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1373 ret = target_core_dev_pr_show_spc2_res(dev, page); 1374 else 1375 ret = target_core_dev_pr_show_spc3_res(dev, page); 1376 spin_unlock(&dev->dev_reservation_lock); 1377 return ret; 1378 } 1379 1380 SE_DEV_PR_ATTR_RO(res_holder); 1381 1382 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts( 1383 struct se_device *dev, char *page) 1384 { 1385 ssize_t len = 0; 1386 1387 spin_lock(&dev->dev_reservation_lock); 1388 if (!dev->dev_pr_res_holder) { 1389 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1390 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { 1391 len = sprintf(page, "SPC-3 Reservation: All Target" 1392 " Ports registration\n"); 1393 } else { 1394 len = sprintf(page, "SPC-3 Reservation: Single" 1395 " Target Port registration\n"); 1396 } 1397 1398 spin_unlock(&dev->dev_reservation_lock); 1399 return len; 1400 } 1401 1402 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts); 1403 1404 static ssize_t target_core_dev_pr_show_attr_res_pr_generation( 1405 struct se_device *dev, char *page) 1406 { 1407 return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation); 1408 } 1409 1410 SE_DEV_PR_ATTR_RO(res_pr_generation); 1411 1412 /* 1413 * res_pr_holder_tg_port 1414 */ 1415 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port( 1416 struct se_device *dev, char *page) 1417 { 1418 struct se_node_acl *se_nacl; 1419 struct se_portal_group *se_tpg; 1420 struct t10_pr_registration *pr_reg; 1421 const struct target_core_fabric_ops *tfo; 1422 ssize_t len = 0; 1423 1424 spin_lock(&dev->dev_reservation_lock); 1425 pr_reg = dev->dev_pr_res_holder; 1426 if (!pr_reg) { 1427 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1428 goto out_unlock; 1429 } 1430 1431 se_nacl = pr_reg->pr_reg_nacl; 1432 se_tpg = se_nacl->se_tpg; 1433 tfo = se_tpg->se_tpg_tfo; 1434 1435 len += sprintf(page+len, "SPC-3 Reservation: %s" 1436 " Target Node Endpoint: %s\n", tfo->get_fabric_name(), 1437 tfo->tpg_get_wwn(se_tpg)); 1438 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1439 " Identifier Tag: %hu %s Portal Group Tag: %hu" 1440 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi, 1441 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg), 1442 tfo->get_fabric_name(), pr_reg->pr_aptpl_target_lun); 1443 1444 out_unlock: 1445 spin_unlock(&dev->dev_reservation_lock); 1446 return len; 1447 } 1448 1449 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port); 1450 1451 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts( 1452 struct se_device *dev, char *page) 1453 { 1454 const struct target_core_fabric_ops *tfo; 1455 struct t10_pr_registration *pr_reg; 1456 unsigned char buf[384]; 1457 char i_buf[PR_REG_ISID_ID_LEN]; 1458 ssize_t len = 0; 1459 int reg_count = 0; 1460 1461 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1462 1463 spin_lock(&dev->t10_pr.registration_lock); 1464 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1465 pr_reg_list) { 1466 1467 memset(buf, 0, 384); 1468 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1469 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1470 core_pr_dump_initiator_port(pr_reg, i_buf, 1471 PR_REG_ISID_ID_LEN); 1472 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1473 tfo->get_fabric_name(), 1474 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, 1475 pr_reg->pr_res_generation); 1476 1477 if (len + strlen(buf) >= PAGE_SIZE) 1478 break; 1479 1480 len += sprintf(page+len, "%s", buf); 1481 reg_count++; 1482 } 1483 spin_unlock(&dev->t10_pr.registration_lock); 1484 1485 if (!reg_count) 1486 len += sprintf(page+len, "None\n"); 1487 1488 return len; 1489 } 1490 1491 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts); 1492 1493 static ssize_t target_core_dev_pr_show_attr_res_pr_type( 1494 struct se_device *dev, char *page) 1495 { 1496 struct t10_pr_registration *pr_reg; 1497 ssize_t len = 0; 1498 1499 spin_lock(&dev->dev_reservation_lock); 1500 pr_reg = dev->dev_pr_res_holder; 1501 if (pr_reg) { 1502 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1503 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 1504 } else { 1505 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1506 } 1507 1508 spin_unlock(&dev->dev_reservation_lock); 1509 return len; 1510 } 1511 1512 SE_DEV_PR_ATTR_RO(res_pr_type); 1513 1514 static ssize_t target_core_dev_pr_show_attr_res_type( 1515 struct se_device *dev, char *page) 1516 { 1517 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) 1518 return sprintf(page, "SPC_PASSTHROUGH\n"); 1519 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1520 return sprintf(page, "SPC2_RESERVATIONS\n"); 1521 else 1522 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 1523 } 1524 1525 SE_DEV_PR_ATTR_RO(res_type); 1526 1527 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active( 1528 struct se_device *dev, char *page) 1529 { 1530 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) 1531 return 0; 1532 1533 return sprintf(page, "APTPL Bit Status: %s\n", 1534 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 1535 } 1536 1537 SE_DEV_PR_ATTR_RO(res_aptpl_active); 1538 1539 /* 1540 * res_aptpl_metadata 1541 */ 1542 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata( 1543 struct se_device *dev, char *page) 1544 { 1545 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) 1546 return 0; 1547 1548 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 1549 } 1550 1551 enum { 1552 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 1553 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 1554 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 1555 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 1556 }; 1557 1558 static match_table_t tokens = { 1559 {Opt_initiator_fabric, "initiator_fabric=%s"}, 1560 {Opt_initiator_node, "initiator_node=%s"}, 1561 {Opt_initiator_sid, "initiator_sid=%s"}, 1562 {Opt_sa_res_key, "sa_res_key=%s"}, 1563 {Opt_res_holder, "res_holder=%d"}, 1564 {Opt_res_type, "res_type=%d"}, 1565 {Opt_res_scope, "res_scope=%d"}, 1566 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 1567 {Opt_mapped_lun, "mapped_lun=%lld"}, 1568 {Opt_target_fabric, "target_fabric=%s"}, 1569 {Opt_target_node, "target_node=%s"}, 1570 {Opt_tpgt, "tpgt=%d"}, 1571 {Opt_port_rtpi, "port_rtpi=%d"}, 1572 {Opt_target_lun, "target_lun=%lld"}, 1573 {Opt_err, NULL} 1574 }; 1575 1576 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata( 1577 struct se_device *dev, 1578 const char *page, 1579 size_t count) 1580 { 1581 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 1582 unsigned char *t_fabric = NULL, *t_port = NULL; 1583 char *orig, *ptr, *opts; 1584 substring_t args[MAX_OPT_ARGS]; 1585 unsigned long long tmp_ll; 1586 u64 sa_res_key = 0; 1587 u64 mapped_lun = 0, target_lun = 0; 1588 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 1589 u16 tpgt = 0; 1590 u8 type = 0; 1591 1592 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) 1593 return count; 1594 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1595 return count; 1596 1597 if (dev->export_count) { 1598 pr_debug("Unable to process APTPL metadata while" 1599 " active fabric exports exist\n"); 1600 return -EINVAL; 1601 } 1602 1603 opts = kstrdup(page, GFP_KERNEL); 1604 if (!opts) 1605 return -ENOMEM; 1606 1607 orig = opts; 1608 while ((ptr = strsep(&opts, ",\n")) != NULL) { 1609 if (!*ptr) 1610 continue; 1611 1612 token = match_token(ptr, tokens, args); 1613 switch (token) { 1614 case Opt_initiator_fabric: 1615 i_fabric = match_strdup(args); 1616 if (!i_fabric) { 1617 ret = -ENOMEM; 1618 goto out; 1619 } 1620 break; 1621 case Opt_initiator_node: 1622 i_port = match_strdup(args); 1623 if (!i_port) { 1624 ret = -ENOMEM; 1625 goto out; 1626 } 1627 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 1628 pr_err("APTPL metadata initiator_node=" 1629 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 1630 PR_APTPL_MAX_IPORT_LEN); 1631 ret = -EINVAL; 1632 break; 1633 } 1634 break; 1635 case Opt_initiator_sid: 1636 isid = match_strdup(args); 1637 if (!isid) { 1638 ret = -ENOMEM; 1639 goto out; 1640 } 1641 if (strlen(isid) >= PR_REG_ISID_LEN) { 1642 pr_err("APTPL metadata initiator_isid" 1643 "= exceeds PR_REG_ISID_LEN: %d\n", 1644 PR_REG_ISID_LEN); 1645 ret = -EINVAL; 1646 break; 1647 } 1648 break; 1649 case Opt_sa_res_key: 1650 ret = kstrtoull(args->from, 0, &tmp_ll); 1651 if (ret < 0) { 1652 pr_err("kstrtoull() failed for sa_res_key=\n"); 1653 goto out; 1654 } 1655 sa_res_key = (u64)tmp_ll; 1656 break; 1657 /* 1658 * PR APTPL Metadata for Reservation 1659 */ 1660 case Opt_res_holder: 1661 ret = match_int(args, &arg); 1662 if (ret) 1663 goto out; 1664 res_holder = arg; 1665 break; 1666 case Opt_res_type: 1667 ret = match_int(args, &arg); 1668 if (ret) 1669 goto out; 1670 type = (u8)arg; 1671 break; 1672 case Opt_res_scope: 1673 ret = match_int(args, &arg); 1674 if (ret) 1675 goto out; 1676 break; 1677 case Opt_res_all_tg_pt: 1678 ret = match_int(args, &arg); 1679 if (ret) 1680 goto out; 1681 all_tg_pt = (int)arg; 1682 break; 1683 case Opt_mapped_lun: 1684 ret = match_int(args, &arg); 1685 if (ret) 1686 goto out; 1687 mapped_lun = (u64)arg; 1688 break; 1689 /* 1690 * PR APTPL Metadata for Target Port 1691 */ 1692 case Opt_target_fabric: 1693 t_fabric = match_strdup(args); 1694 if (!t_fabric) { 1695 ret = -ENOMEM; 1696 goto out; 1697 } 1698 break; 1699 case Opt_target_node: 1700 t_port = match_strdup(args); 1701 if (!t_port) { 1702 ret = -ENOMEM; 1703 goto out; 1704 } 1705 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 1706 pr_err("APTPL metadata target_node=" 1707 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 1708 PR_APTPL_MAX_TPORT_LEN); 1709 ret = -EINVAL; 1710 break; 1711 } 1712 break; 1713 case Opt_tpgt: 1714 ret = match_int(args, &arg); 1715 if (ret) 1716 goto out; 1717 tpgt = (u16)arg; 1718 break; 1719 case Opt_port_rtpi: 1720 ret = match_int(args, &arg); 1721 if (ret) 1722 goto out; 1723 break; 1724 case Opt_target_lun: 1725 ret = match_int(args, &arg); 1726 if (ret) 1727 goto out; 1728 target_lun = (u64)arg; 1729 break; 1730 default: 1731 break; 1732 } 1733 } 1734 1735 if (!i_port || !t_port || !sa_res_key) { 1736 pr_err("Illegal parameters for APTPL registration\n"); 1737 ret = -EINVAL; 1738 goto out; 1739 } 1740 1741 if (res_holder && !(type)) { 1742 pr_err("Illegal PR type: 0x%02x for reservation" 1743 " holder\n", type); 1744 ret = -EINVAL; 1745 goto out; 1746 } 1747 1748 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, 1749 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 1750 res_holder, all_tg_pt, type); 1751 out: 1752 kfree(i_fabric); 1753 kfree(i_port); 1754 kfree(isid); 1755 kfree(t_fabric); 1756 kfree(t_port); 1757 kfree(orig); 1758 return (ret == 0) ? count : ret; 1759 } 1760 1761 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR); 1762 1763 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group); 1764 1765 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 1766 &target_core_dev_pr_res_holder.attr, 1767 &target_core_dev_pr_res_pr_all_tgt_pts.attr, 1768 &target_core_dev_pr_res_pr_generation.attr, 1769 &target_core_dev_pr_res_pr_holder_tg_port.attr, 1770 &target_core_dev_pr_res_pr_registered_i_pts.attr, 1771 &target_core_dev_pr_res_pr_type.attr, 1772 &target_core_dev_pr_res_type.attr, 1773 &target_core_dev_pr_res_aptpl_active.attr, 1774 &target_core_dev_pr_res_aptpl_metadata.attr, 1775 NULL, 1776 }; 1777 1778 static struct configfs_item_operations target_core_dev_pr_ops = { 1779 .show_attribute = target_core_dev_pr_attr_show, 1780 .store_attribute = target_core_dev_pr_attr_store, 1781 }; 1782 1783 TB_CIT_SETUP(dev_pr, &target_core_dev_pr_ops, NULL, target_core_dev_pr_attrs); 1784 1785 /* End functions for struct config_item_type tb_dev_pr_cit */ 1786 1787 /* Start functions for struct config_item_type tb_dev_cit */ 1788 1789 static ssize_t target_core_show_dev_info(void *p, char *page) 1790 { 1791 struct se_device *dev = p; 1792 int bl = 0; 1793 ssize_t read_bytes = 0; 1794 1795 transport_dump_dev_state(dev, page, &bl); 1796 read_bytes += bl; 1797 read_bytes += dev->transport->show_configfs_dev_params(dev, 1798 page+read_bytes); 1799 return read_bytes; 1800 } 1801 1802 static struct target_core_configfs_attribute target_core_attr_dev_info = { 1803 .attr = { .ca_owner = THIS_MODULE, 1804 .ca_name = "info", 1805 .ca_mode = S_IRUGO }, 1806 .show = target_core_show_dev_info, 1807 .store = NULL, 1808 }; 1809 1810 static ssize_t target_core_store_dev_control( 1811 void *p, 1812 const char *page, 1813 size_t count) 1814 { 1815 struct se_device *dev = p; 1816 1817 return dev->transport->set_configfs_dev_params(dev, page, count); 1818 } 1819 1820 static struct target_core_configfs_attribute target_core_attr_dev_control = { 1821 .attr = { .ca_owner = THIS_MODULE, 1822 .ca_name = "control", 1823 .ca_mode = S_IWUSR }, 1824 .show = NULL, 1825 .store = target_core_store_dev_control, 1826 }; 1827 1828 static ssize_t target_core_show_dev_alias(void *p, char *page) 1829 { 1830 struct se_device *dev = p; 1831 1832 if (!(dev->dev_flags & DF_USING_ALIAS)) 1833 return 0; 1834 1835 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); 1836 } 1837 1838 static ssize_t target_core_store_dev_alias( 1839 void *p, 1840 const char *page, 1841 size_t count) 1842 { 1843 struct se_device *dev = p; 1844 struct se_hba *hba = dev->se_hba; 1845 ssize_t read_bytes; 1846 1847 if (count > (SE_DEV_ALIAS_LEN-1)) { 1848 pr_err("alias count: %d exceeds" 1849 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 1850 SE_DEV_ALIAS_LEN-1); 1851 return -EINVAL; 1852 } 1853 1854 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); 1855 if (!read_bytes) 1856 return -EINVAL; 1857 if (dev->dev_alias[read_bytes - 1] == '\n') 1858 dev->dev_alias[read_bytes - 1] = '\0'; 1859 1860 dev->dev_flags |= DF_USING_ALIAS; 1861 1862 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 1863 config_item_name(&hba->hba_group.cg_item), 1864 config_item_name(&dev->dev_group.cg_item), 1865 dev->dev_alias); 1866 1867 return read_bytes; 1868 } 1869 1870 static struct target_core_configfs_attribute target_core_attr_dev_alias = { 1871 .attr = { .ca_owner = THIS_MODULE, 1872 .ca_name = "alias", 1873 .ca_mode = S_IRUGO | S_IWUSR }, 1874 .show = target_core_show_dev_alias, 1875 .store = target_core_store_dev_alias, 1876 }; 1877 1878 static ssize_t target_core_show_dev_udev_path(void *p, char *page) 1879 { 1880 struct se_device *dev = p; 1881 1882 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) 1883 return 0; 1884 1885 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); 1886 } 1887 1888 static ssize_t target_core_store_dev_udev_path( 1889 void *p, 1890 const char *page, 1891 size_t count) 1892 { 1893 struct se_device *dev = p; 1894 struct se_hba *hba = dev->se_hba; 1895 ssize_t read_bytes; 1896 1897 if (count > (SE_UDEV_PATH_LEN-1)) { 1898 pr_err("udev_path count: %d exceeds" 1899 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 1900 SE_UDEV_PATH_LEN-1); 1901 return -EINVAL; 1902 } 1903 1904 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, 1905 "%s", page); 1906 if (!read_bytes) 1907 return -EINVAL; 1908 if (dev->udev_path[read_bytes - 1] == '\n') 1909 dev->udev_path[read_bytes - 1] = '\0'; 1910 1911 dev->dev_flags |= DF_USING_UDEV_PATH; 1912 1913 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 1914 config_item_name(&hba->hba_group.cg_item), 1915 config_item_name(&dev->dev_group.cg_item), 1916 dev->udev_path); 1917 1918 return read_bytes; 1919 } 1920 1921 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = { 1922 .attr = { .ca_owner = THIS_MODULE, 1923 .ca_name = "udev_path", 1924 .ca_mode = S_IRUGO | S_IWUSR }, 1925 .show = target_core_show_dev_udev_path, 1926 .store = target_core_store_dev_udev_path, 1927 }; 1928 1929 static ssize_t target_core_show_dev_enable(void *p, char *page) 1930 { 1931 struct se_device *dev = p; 1932 1933 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED)); 1934 } 1935 1936 static ssize_t target_core_store_dev_enable( 1937 void *p, 1938 const char *page, 1939 size_t count) 1940 { 1941 struct se_device *dev = p; 1942 char *ptr; 1943 int ret; 1944 1945 ptr = strstr(page, "1"); 1946 if (!ptr) { 1947 pr_err("For dev_enable ops, only valid value" 1948 " is \"1\"\n"); 1949 return -EINVAL; 1950 } 1951 1952 ret = target_configure_device(dev); 1953 if (ret) 1954 return ret; 1955 return count; 1956 } 1957 1958 static struct target_core_configfs_attribute target_core_attr_dev_enable = { 1959 .attr = { .ca_owner = THIS_MODULE, 1960 .ca_name = "enable", 1961 .ca_mode = S_IRUGO | S_IWUSR }, 1962 .show = target_core_show_dev_enable, 1963 .store = target_core_store_dev_enable, 1964 }; 1965 1966 static ssize_t target_core_show_alua_lu_gp(void *p, char *page) 1967 { 1968 struct se_device *dev = p; 1969 struct config_item *lu_ci; 1970 struct t10_alua_lu_gp *lu_gp; 1971 struct t10_alua_lu_gp_member *lu_gp_mem; 1972 ssize_t len = 0; 1973 1974 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1975 if (!lu_gp_mem) 1976 return 0; 1977 1978 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1979 lu_gp = lu_gp_mem->lu_gp; 1980 if (lu_gp) { 1981 lu_ci = &lu_gp->lu_gp_group.cg_item; 1982 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 1983 config_item_name(lu_ci), lu_gp->lu_gp_id); 1984 } 1985 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1986 1987 return len; 1988 } 1989 1990 static ssize_t target_core_store_alua_lu_gp( 1991 void *p, 1992 const char *page, 1993 size_t count) 1994 { 1995 struct se_device *dev = p; 1996 struct se_hba *hba = dev->se_hba; 1997 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 1998 struct t10_alua_lu_gp_member *lu_gp_mem; 1999 unsigned char buf[LU_GROUP_NAME_BUF]; 2000 int move = 0; 2001 2002 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2003 if (!lu_gp_mem) 2004 return count; 2005 2006 if (count > LU_GROUP_NAME_BUF) { 2007 pr_err("ALUA LU Group Alias too large!\n"); 2008 return -EINVAL; 2009 } 2010 memset(buf, 0, LU_GROUP_NAME_BUF); 2011 memcpy(buf, page, count); 2012 /* 2013 * Any ALUA logical unit alias besides "NULL" means we will be 2014 * making a new group association. 2015 */ 2016 if (strcmp(strstrip(buf), "NULL")) { 2017 /* 2018 * core_alua_get_lu_gp_by_name() will increment reference to 2019 * struct t10_alua_lu_gp. This reference is released with 2020 * core_alua_get_lu_gp_by_name below(). 2021 */ 2022 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 2023 if (!lu_gp_new) 2024 return -ENODEV; 2025 } 2026 2027 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2028 lu_gp = lu_gp_mem->lu_gp; 2029 if (lu_gp) { 2030 /* 2031 * Clearing an existing lu_gp association, and replacing 2032 * with NULL 2033 */ 2034 if (!lu_gp_new) { 2035 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 2036 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 2037 " %hu\n", 2038 config_item_name(&hba->hba_group.cg_item), 2039 config_item_name(&dev->dev_group.cg_item), 2040 config_item_name(&lu_gp->lu_gp_group.cg_item), 2041 lu_gp->lu_gp_id); 2042 2043 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2044 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2045 2046 return count; 2047 } 2048 /* 2049 * Removing existing association of lu_gp_mem with lu_gp 2050 */ 2051 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2052 move = 1; 2053 } 2054 /* 2055 * Associate lu_gp_mem with lu_gp_new. 2056 */ 2057 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 2058 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2059 2060 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 2061 " core/alua/lu_gps/%s, ID: %hu\n", 2062 (move) ? "Moving" : "Adding", 2063 config_item_name(&hba->hba_group.cg_item), 2064 config_item_name(&dev->dev_group.cg_item), 2065 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 2066 lu_gp_new->lu_gp_id); 2067 2068 core_alua_put_lu_gp_from_name(lu_gp_new); 2069 return count; 2070 } 2071 2072 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = { 2073 .attr = { .ca_owner = THIS_MODULE, 2074 .ca_name = "alua_lu_gp", 2075 .ca_mode = S_IRUGO | S_IWUSR }, 2076 .show = target_core_show_alua_lu_gp, 2077 .store = target_core_store_alua_lu_gp, 2078 }; 2079 2080 static ssize_t target_core_show_dev_lba_map(void *p, char *page) 2081 { 2082 struct se_device *dev = p; 2083 struct t10_alua_lba_map *map; 2084 struct t10_alua_lba_map_member *mem; 2085 char *b = page; 2086 int bl = 0; 2087 char state; 2088 2089 spin_lock(&dev->t10_alua.lba_map_lock); 2090 if (!list_empty(&dev->t10_alua.lba_map_list)) 2091 bl += sprintf(b + bl, "%u %u\n", 2092 dev->t10_alua.lba_map_segment_size, 2093 dev->t10_alua.lba_map_segment_multiplier); 2094 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) { 2095 bl += sprintf(b + bl, "%llu %llu", 2096 map->lba_map_first_lba, map->lba_map_last_lba); 2097 list_for_each_entry(mem, &map->lba_map_mem_list, 2098 lba_map_mem_list) { 2099 switch (mem->lba_map_mem_alua_state) { 2100 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: 2101 state = 'O'; 2102 break; 2103 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: 2104 state = 'A'; 2105 break; 2106 case ALUA_ACCESS_STATE_STANDBY: 2107 state = 'S'; 2108 break; 2109 case ALUA_ACCESS_STATE_UNAVAILABLE: 2110 state = 'U'; 2111 break; 2112 default: 2113 state = '.'; 2114 break; 2115 } 2116 bl += sprintf(b + bl, " %d:%c", 2117 mem->lba_map_mem_alua_pg_id, state); 2118 } 2119 bl += sprintf(b + bl, "\n"); 2120 } 2121 spin_unlock(&dev->t10_alua.lba_map_lock); 2122 return bl; 2123 } 2124 2125 static ssize_t target_core_store_dev_lba_map( 2126 void *p, 2127 const char *page, 2128 size_t count) 2129 { 2130 struct se_device *dev = p; 2131 struct t10_alua_lba_map *lba_map = NULL; 2132 struct list_head lba_list; 2133 char *map_entries, *ptr; 2134 char state; 2135 int pg_num = -1, pg; 2136 int ret = 0, num = 0, pg_id, alua_state; 2137 unsigned long start_lba = -1, end_lba = -1; 2138 unsigned long segment_size = -1, segment_mult = -1; 2139 2140 map_entries = kstrdup(page, GFP_KERNEL); 2141 if (!map_entries) 2142 return -ENOMEM; 2143 2144 INIT_LIST_HEAD(&lba_list); 2145 while ((ptr = strsep(&map_entries, "\n")) != NULL) { 2146 if (!*ptr) 2147 continue; 2148 2149 if (num == 0) { 2150 if (sscanf(ptr, "%lu %lu\n", 2151 &segment_size, &segment_mult) != 2) { 2152 pr_err("Invalid line %d\n", num); 2153 ret = -EINVAL; 2154 break; 2155 } 2156 num++; 2157 continue; 2158 } 2159 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) { 2160 pr_err("Invalid line %d\n", num); 2161 ret = -EINVAL; 2162 break; 2163 } 2164 ptr = strchr(ptr, ' '); 2165 if (!ptr) { 2166 pr_err("Invalid line %d, missing end lba\n", num); 2167 ret = -EINVAL; 2168 break; 2169 } 2170 ptr++; 2171 ptr = strchr(ptr, ' '); 2172 if (!ptr) { 2173 pr_err("Invalid line %d, missing state definitions\n", 2174 num); 2175 ret = -EINVAL; 2176 break; 2177 } 2178 ptr++; 2179 lba_map = core_alua_allocate_lba_map(&lba_list, 2180 start_lba, end_lba); 2181 if (IS_ERR(lba_map)) { 2182 ret = PTR_ERR(lba_map); 2183 break; 2184 } 2185 pg = 0; 2186 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) { 2187 switch (state) { 2188 case 'O': 2189 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED; 2190 break; 2191 case 'A': 2192 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED; 2193 break; 2194 case 'S': 2195 alua_state = ALUA_ACCESS_STATE_STANDBY; 2196 break; 2197 case 'U': 2198 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE; 2199 break; 2200 default: 2201 pr_err("Invalid ALUA state '%c'\n", state); 2202 ret = -EINVAL; 2203 goto out; 2204 } 2205 2206 ret = core_alua_allocate_lba_map_mem(lba_map, 2207 pg_id, alua_state); 2208 if (ret) { 2209 pr_err("Invalid target descriptor %d:%c " 2210 "at line %d\n", 2211 pg_id, state, num); 2212 break; 2213 } 2214 pg++; 2215 ptr = strchr(ptr, ' '); 2216 if (ptr) 2217 ptr++; 2218 else 2219 break; 2220 } 2221 if (pg_num == -1) 2222 pg_num = pg; 2223 else if (pg != pg_num) { 2224 pr_err("Only %d from %d port groups definitions " 2225 "at line %d\n", pg, pg_num, num); 2226 ret = -EINVAL; 2227 break; 2228 } 2229 num++; 2230 } 2231 out: 2232 if (ret) { 2233 core_alua_free_lba_map(&lba_list); 2234 count = ret; 2235 } else 2236 core_alua_set_lba_map(dev, &lba_list, 2237 segment_size, segment_mult); 2238 kfree(map_entries); 2239 return count; 2240 } 2241 2242 static struct target_core_configfs_attribute target_core_attr_dev_lba_map = { 2243 .attr = { .ca_owner = THIS_MODULE, 2244 .ca_name = "lba_map", 2245 .ca_mode = S_IRUGO | S_IWUSR }, 2246 .show = target_core_show_dev_lba_map, 2247 .store = target_core_store_dev_lba_map, 2248 }; 2249 2250 static struct configfs_attribute *target_core_dev_attrs[] = { 2251 &target_core_attr_dev_info.attr, 2252 &target_core_attr_dev_control.attr, 2253 &target_core_attr_dev_alias.attr, 2254 &target_core_attr_dev_udev_path.attr, 2255 &target_core_attr_dev_enable.attr, 2256 &target_core_attr_dev_alua_lu_gp.attr, 2257 &target_core_attr_dev_lba_map.attr, 2258 NULL, 2259 }; 2260 2261 static void target_core_dev_release(struct config_item *item) 2262 { 2263 struct config_group *dev_cg = to_config_group(item); 2264 struct se_device *dev = 2265 container_of(dev_cg, struct se_device, dev_group); 2266 2267 kfree(dev_cg->default_groups); 2268 target_free_device(dev); 2269 } 2270 2271 static ssize_t target_core_dev_show(struct config_item *item, 2272 struct configfs_attribute *attr, 2273 char *page) 2274 { 2275 struct config_group *dev_cg = to_config_group(item); 2276 struct se_device *dev = 2277 container_of(dev_cg, struct se_device, dev_group); 2278 struct target_core_configfs_attribute *tc_attr = container_of( 2279 attr, struct target_core_configfs_attribute, attr); 2280 2281 if (!tc_attr->show) 2282 return -EINVAL; 2283 2284 return tc_attr->show(dev, page); 2285 } 2286 2287 static ssize_t target_core_dev_store(struct config_item *item, 2288 struct configfs_attribute *attr, 2289 const char *page, size_t count) 2290 { 2291 struct config_group *dev_cg = to_config_group(item); 2292 struct se_device *dev = 2293 container_of(dev_cg, struct se_device, dev_group); 2294 struct target_core_configfs_attribute *tc_attr = container_of( 2295 attr, struct target_core_configfs_attribute, attr); 2296 2297 if (!tc_attr->store) 2298 return -EINVAL; 2299 2300 return tc_attr->store(dev, page, count); 2301 } 2302 2303 static struct configfs_item_operations target_core_dev_item_ops = { 2304 .release = target_core_dev_release, 2305 .show_attribute = target_core_dev_show, 2306 .store_attribute = target_core_dev_store, 2307 }; 2308 2309 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs); 2310 2311 /* End functions for struct config_item_type tb_dev_cit */ 2312 2313 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 2314 2315 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp); 2316 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \ 2317 static struct target_core_alua_lu_gp_attribute \ 2318 target_core_alua_lu_gp_##_name = \ 2319 __CONFIGFS_EATTR(_name, _mode, \ 2320 target_core_alua_lu_gp_show_attr_##_name, \ 2321 target_core_alua_lu_gp_store_attr_##_name); 2322 2323 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \ 2324 static struct target_core_alua_lu_gp_attribute \ 2325 target_core_alua_lu_gp_##_name = \ 2326 __CONFIGFS_EATTR_RO(_name, \ 2327 target_core_alua_lu_gp_show_attr_##_name); 2328 2329 /* 2330 * lu_gp_id 2331 */ 2332 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id( 2333 struct t10_alua_lu_gp *lu_gp, 2334 char *page) 2335 { 2336 if (!lu_gp->lu_gp_valid_id) 2337 return 0; 2338 2339 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2340 } 2341 2342 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id( 2343 struct t10_alua_lu_gp *lu_gp, 2344 const char *page, 2345 size_t count) 2346 { 2347 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2348 unsigned long lu_gp_id; 2349 int ret; 2350 2351 ret = kstrtoul(page, 0, &lu_gp_id); 2352 if (ret < 0) { 2353 pr_err("kstrtoul() returned %d for" 2354 " lu_gp_id\n", ret); 2355 return ret; 2356 } 2357 if (lu_gp_id > 0x0000ffff) { 2358 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 2359 " 0x0000ffff\n", lu_gp_id); 2360 return -EINVAL; 2361 } 2362 2363 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2364 if (ret < 0) 2365 return -EINVAL; 2366 2367 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 2368 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2369 config_item_name(&alua_lu_gp_cg->cg_item), 2370 lu_gp->lu_gp_id); 2371 2372 return count; 2373 } 2374 2375 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR); 2376 2377 /* 2378 * members 2379 */ 2380 static ssize_t target_core_alua_lu_gp_show_attr_members( 2381 struct t10_alua_lu_gp *lu_gp, 2382 char *page) 2383 { 2384 struct se_device *dev; 2385 struct se_hba *hba; 2386 struct t10_alua_lu_gp_member *lu_gp_mem; 2387 ssize_t len = 0, cur_len; 2388 unsigned char buf[LU_GROUP_NAME_BUF]; 2389 2390 memset(buf, 0, LU_GROUP_NAME_BUF); 2391 2392 spin_lock(&lu_gp->lu_gp_lock); 2393 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2394 dev = lu_gp_mem->lu_gp_mem_dev; 2395 hba = dev->se_hba; 2396 2397 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 2398 config_item_name(&hba->hba_group.cg_item), 2399 config_item_name(&dev->dev_group.cg_item)); 2400 cur_len++; /* Extra byte for NULL terminator */ 2401 2402 if ((cur_len + len) > PAGE_SIZE) { 2403 pr_warn("Ran out of lu_gp_show_attr" 2404 "_members buffer\n"); 2405 break; 2406 } 2407 memcpy(page+len, buf, cur_len); 2408 len += cur_len; 2409 } 2410 spin_unlock(&lu_gp->lu_gp_lock); 2411 2412 return len; 2413 } 2414 2415 SE_DEV_ALUA_LU_ATTR_RO(members); 2416 2417 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group); 2418 2419 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2420 &target_core_alua_lu_gp_lu_gp_id.attr, 2421 &target_core_alua_lu_gp_members.attr, 2422 NULL, 2423 }; 2424 2425 static void target_core_alua_lu_gp_release(struct config_item *item) 2426 { 2427 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2428 struct t10_alua_lu_gp, lu_gp_group); 2429 2430 core_alua_free_lu_gp(lu_gp); 2431 } 2432 2433 static struct configfs_item_operations target_core_alua_lu_gp_ops = { 2434 .release = target_core_alua_lu_gp_release, 2435 .show_attribute = target_core_alua_lu_gp_attr_show, 2436 .store_attribute = target_core_alua_lu_gp_attr_store, 2437 }; 2438 2439 static struct config_item_type target_core_alua_lu_gp_cit = { 2440 .ct_item_ops = &target_core_alua_lu_gp_ops, 2441 .ct_attrs = target_core_alua_lu_gp_attrs, 2442 .ct_owner = THIS_MODULE, 2443 }; 2444 2445 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2446 2447 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2448 2449 static struct config_group *target_core_alua_create_lu_gp( 2450 struct config_group *group, 2451 const char *name) 2452 { 2453 struct t10_alua_lu_gp *lu_gp; 2454 struct config_group *alua_lu_gp_cg = NULL; 2455 struct config_item *alua_lu_gp_ci = NULL; 2456 2457 lu_gp = core_alua_allocate_lu_gp(name, 0); 2458 if (IS_ERR(lu_gp)) 2459 return NULL; 2460 2461 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2462 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2463 2464 config_group_init_type_name(alua_lu_gp_cg, name, 2465 &target_core_alua_lu_gp_cit); 2466 2467 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2468 " Group: core/alua/lu_gps/%s\n", 2469 config_item_name(alua_lu_gp_ci)); 2470 2471 return alua_lu_gp_cg; 2472 2473 } 2474 2475 static void target_core_alua_drop_lu_gp( 2476 struct config_group *group, 2477 struct config_item *item) 2478 { 2479 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2480 struct t10_alua_lu_gp, lu_gp_group); 2481 2482 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2483 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2484 config_item_name(item), lu_gp->lu_gp_id); 2485 /* 2486 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 2487 * -> target_core_alua_lu_gp_release() 2488 */ 2489 config_item_put(item); 2490 } 2491 2492 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2493 .make_group = &target_core_alua_create_lu_gp, 2494 .drop_item = &target_core_alua_drop_lu_gp, 2495 }; 2496 2497 static struct config_item_type target_core_alua_lu_gps_cit = { 2498 .ct_item_ops = NULL, 2499 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2500 .ct_owner = THIS_MODULE, 2501 }; 2502 2503 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2504 2505 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2506 2507 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp); 2508 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \ 2509 static struct target_core_alua_tg_pt_gp_attribute \ 2510 target_core_alua_tg_pt_gp_##_name = \ 2511 __CONFIGFS_EATTR(_name, _mode, \ 2512 target_core_alua_tg_pt_gp_show_attr_##_name, \ 2513 target_core_alua_tg_pt_gp_store_attr_##_name); 2514 2515 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \ 2516 static struct target_core_alua_tg_pt_gp_attribute \ 2517 target_core_alua_tg_pt_gp_##_name = \ 2518 __CONFIGFS_EATTR_RO(_name, \ 2519 target_core_alua_tg_pt_gp_show_attr_##_name); 2520 2521 /* 2522 * alua_access_state 2523 */ 2524 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state( 2525 struct t10_alua_tg_pt_gp *tg_pt_gp, 2526 char *page) 2527 { 2528 return sprintf(page, "%d\n", 2529 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state)); 2530 } 2531 2532 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state( 2533 struct t10_alua_tg_pt_gp *tg_pt_gp, 2534 const char *page, 2535 size_t count) 2536 { 2537 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; 2538 unsigned long tmp; 2539 int new_state, ret; 2540 2541 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2542 pr_err("Unable to do implicit ALUA on non valid" 2543 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id); 2544 return -EINVAL; 2545 } 2546 if (!(dev->dev_flags & DF_CONFIGURED)) { 2547 pr_err("Unable to set alua_access_state while device is" 2548 " not configured\n"); 2549 return -ENODEV; 2550 } 2551 2552 ret = kstrtoul(page, 0, &tmp); 2553 if (ret < 0) { 2554 pr_err("Unable to extract new ALUA access state from" 2555 " %s\n", page); 2556 return ret; 2557 } 2558 new_state = (int)tmp; 2559 2560 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) { 2561 pr_err("Unable to process implicit configfs ALUA" 2562 " transition while TPGS_IMPLICIT_ALUA is disabled\n"); 2563 return -EINVAL; 2564 } 2565 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA && 2566 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) { 2567 /* LBA DEPENDENT is only allowed with implicit ALUA */ 2568 pr_err("Unable to process implicit configfs ALUA transition" 2569 " while explicit ALUA management is enabled\n"); 2570 return -EINVAL; 2571 } 2572 2573 ret = core_alua_do_port_transition(tg_pt_gp, dev, 2574 NULL, NULL, new_state, 0); 2575 return (!ret) ? count : -EINVAL; 2576 } 2577 2578 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR); 2579 2580 /* 2581 * alua_access_status 2582 */ 2583 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status( 2584 struct t10_alua_tg_pt_gp *tg_pt_gp, 2585 char *page) 2586 { 2587 return sprintf(page, "%s\n", 2588 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2589 } 2590 2591 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status( 2592 struct t10_alua_tg_pt_gp *tg_pt_gp, 2593 const char *page, 2594 size_t count) 2595 { 2596 unsigned long tmp; 2597 int new_status, ret; 2598 2599 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2600 pr_err("Unable to do set ALUA access status on non" 2601 " valid tg_pt_gp ID: %hu\n", 2602 tg_pt_gp->tg_pt_gp_valid_id); 2603 return -EINVAL; 2604 } 2605 2606 ret = kstrtoul(page, 0, &tmp); 2607 if (ret < 0) { 2608 pr_err("Unable to extract new ALUA access status" 2609 " from %s\n", page); 2610 return ret; 2611 } 2612 new_status = (int)tmp; 2613 2614 if ((new_status != ALUA_STATUS_NONE) && 2615 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && 2616 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { 2617 pr_err("Illegal ALUA access status: 0x%02x\n", 2618 new_status); 2619 return -EINVAL; 2620 } 2621 2622 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2623 return count; 2624 } 2625 2626 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR); 2627 2628 /* 2629 * alua_access_type 2630 */ 2631 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type( 2632 struct t10_alua_tg_pt_gp *tg_pt_gp, 2633 char *page) 2634 { 2635 return core_alua_show_access_type(tg_pt_gp, page); 2636 } 2637 2638 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type( 2639 struct t10_alua_tg_pt_gp *tg_pt_gp, 2640 const char *page, 2641 size_t count) 2642 { 2643 return core_alua_store_access_type(tg_pt_gp, page, count); 2644 } 2645 2646 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR); 2647 2648 /* 2649 * alua_supported_states 2650 */ 2651 2652 #define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit) \ 2653 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \ 2654 struct t10_alua_tg_pt_gp *t, char *p) \ 2655 { \ 2656 return sprintf(p, "%d\n", !!(t->_var & _bit)); \ 2657 } 2658 2659 #define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit) \ 2660 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\ 2661 struct t10_alua_tg_pt_gp *t, const char *p, size_t c) \ 2662 { \ 2663 unsigned long tmp; \ 2664 int ret; \ 2665 \ 2666 if (!t->tg_pt_gp_valid_id) { \ 2667 pr_err("Unable to do set ##_name ALUA state on non" \ 2668 " valid tg_pt_gp ID: %hu\n", \ 2669 t->tg_pt_gp_valid_id); \ 2670 return -EINVAL; \ 2671 } \ 2672 \ 2673 ret = kstrtoul(p, 0, &tmp); \ 2674 if (ret < 0) { \ 2675 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \ 2676 return -EINVAL; \ 2677 } \ 2678 if (tmp > 1) { \ 2679 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \ 2680 return -EINVAL; \ 2681 } \ 2682 if (tmp) \ 2683 t->_var |= _bit; \ 2684 else \ 2685 t->_var &= ~_bit; \ 2686 \ 2687 return c; \ 2688 } 2689 2690 SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning, 2691 tg_pt_gp_alua_supported_states, ALUA_T_SUP); 2692 SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning, 2693 tg_pt_gp_alua_supported_states, ALUA_T_SUP); 2694 SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR); 2695 2696 SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline, 2697 tg_pt_gp_alua_supported_states, ALUA_O_SUP); 2698 SE_DEV_ALUA_SUPPORT_STATE_STORE(offline, 2699 tg_pt_gp_alua_supported_states, ALUA_O_SUP); 2700 SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR); 2701 2702 SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent, 2703 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP); 2704 SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent, 2705 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP); 2706 SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO); 2707 2708 SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable, 2709 tg_pt_gp_alua_supported_states, ALUA_U_SUP); 2710 SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable, 2711 tg_pt_gp_alua_supported_states, ALUA_U_SUP); 2712 SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR); 2713 2714 SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby, 2715 tg_pt_gp_alua_supported_states, ALUA_S_SUP); 2716 SE_DEV_ALUA_SUPPORT_STATE_STORE(standby, 2717 tg_pt_gp_alua_supported_states, ALUA_S_SUP); 2718 SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR); 2719 2720 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized, 2721 tg_pt_gp_alua_supported_states, ALUA_AO_SUP); 2722 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized, 2723 tg_pt_gp_alua_supported_states, ALUA_AO_SUP); 2724 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR); 2725 2726 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized, 2727 tg_pt_gp_alua_supported_states, ALUA_AN_SUP); 2728 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized, 2729 tg_pt_gp_alua_supported_states, ALUA_AN_SUP); 2730 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR); 2731 2732 /* 2733 * alua_write_metadata 2734 */ 2735 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata( 2736 struct t10_alua_tg_pt_gp *tg_pt_gp, 2737 char *page) 2738 { 2739 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata); 2740 } 2741 2742 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata( 2743 struct t10_alua_tg_pt_gp *tg_pt_gp, 2744 const char *page, 2745 size_t count) 2746 { 2747 unsigned long tmp; 2748 int ret; 2749 2750 ret = kstrtoul(page, 0, &tmp); 2751 if (ret < 0) { 2752 pr_err("Unable to extract alua_write_metadata\n"); 2753 return ret; 2754 } 2755 2756 if ((tmp != 0) && (tmp != 1)) { 2757 pr_err("Illegal value for alua_write_metadata:" 2758 " %lu\n", tmp); 2759 return -EINVAL; 2760 } 2761 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 2762 2763 return count; 2764 } 2765 2766 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR); 2767 2768 2769 2770 /* 2771 * nonop_delay_msecs 2772 */ 2773 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs( 2774 struct t10_alua_tg_pt_gp *tg_pt_gp, 2775 char *page) 2776 { 2777 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page); 2778 2779 } 2780 2781 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs( 2782 struct t10_alua_tg_pt_gp *tg_pt_gp, 2783 const char *page, 2784 size_t count) 2785 { 2786 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count); 2787 } 2788 2789 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR); 2790 2791 /* 2792 * trans_delay_msecs 2793 */ 2794 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs( 2795 struct t10_alua_tg_pt_gp *tg_pt_gp, 2796 char *page) 2797 { 2798 return core_alua_show_trans_delay_msecs(tg_pt_gp, page); 2799 } 2800 2801 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs( 2802 struct t10_alua_tg_pt_gp *tg_pt_gp, 2803 const char *page, 2804 size_t count) 2805 { 2806 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count); 2807 } 2808 2809 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR); 2810 2811 /* 2812 * implicit_trans_secs 2813 */ 2814 static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs( 2815 struct t10_alua_tg_pt_gp *tg_pt_gp, 2816 char *page) 2817 { 2818 return core_alua_show_implicit_trans_secs(tg_pt_gp, page); 2819 } 2820 2821 static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs( 2822 struct t10_alua_tg_pt_gp *tg_pt_gp, 2823 const char *page, 2824 size_t count) 2825 { 2826 return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count); 2827 } 2828 2829 SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR); 2830 2831 /* 2832 * preferred 2833 */ 2834 2835 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred( 2836 struct t10_alua_tg_pt_gp *tg_pt_gp, 2837 char *page) 2838 { 2839 return core_alua_show_preferred_bit(tg_pt_gp, page); 2840 } 2841 2842 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred( 2843 struct t10_alua_tg_pt_gp *tg_pt_gp, 2844 const char *page, 2845 size_t count) 2846 { 2847 return core_alua_store_preferred_bit(tg_pt_gp, page, count); 2848 } 2849 2850 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR); 2851 2852 /* 2853 * tg_pt_gp_id 2854 */ 2855 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id( 2856 struct t10_alua_tg_pt_gp *tg_pt_gp, 2857 char *page) 2858 { 2859 if (!tg_pt_gp->tg_pt_gp_valid_id) 2860 return 0; 2861 2862 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 2863 } 2864 2865 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id( 2866 struct t10_alua_tg_pt_gp *tg_pt_gp, 2867 const char *page, 2868 size_t count) 2869 { 2870 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2871 unsigned long tg_pt_gp_id; 2872 int ret; 2873 2874 ret = kstrtoul(page, 0, &tg_pt_gp_id); 2875 if (ret < 0) { 2876 pr_err("kstrtoul() returned %d for" 2877 " tg_pt_gp_id\n", ret); 2878 return ret; 2879 } 2880 if (tg_pt_gp_id > 0x0000ffff) { 2881 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:" 2882 " 0x0000ffff\n", tg_pt_gp_id); 2883 return -EINVAL; 2884 } 2885 2886 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 2887 if (ret < 0) 2888 return -EINVAL; 2889 2890 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 2891 "core/alua/tg_pt_gps/%s to ID: %hu\n", 2892 config_item_name(&alua_tg_pt_gp_cg->cg_item), 2893 tg_pt_gp->tg_pt_gp_id); 2894 2895 return count; 2896 } 2897 2898 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR); 2899 2900 /* 2901 * members 2902 */ 2903 static ssize_t target_core_alua_tg_pt_gp_show_attr_members( 2904 struct t10_alua_tg_pt_gp *tg_pt_gp, 2905 char *page) 2906 { 2907 struct se_lun *lun; 2908 ssize_t len = 0, cur_len; 2909 unsigned char buf[TG_PT_GROUP_NAME_BUF]; 2910 2911 memset(buf, 0, TG_PT_GROUP_NAME_BUF); 2912 2913 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 2914 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, 2915 lun_tg_pt_gp_link) { 2916 struct se_portal_group *tpg = lun->lun_tpg; 2917 2918 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 2919 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(), 2920 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 2921 tpg->se_tpg_tfo->tpg_get_tag(tpg), 2922 config_item_name(&lun->lun_group.cg_item)); 2923 cur_len++; /* Extra byte for NULL terminator */ 2924 2925 if ((cur_len + len) > PAGE_SIZE) { 2926 pr_warn("Ran out of lu_gp_show_attr" 2927 "_members buffer\n"); 2928 break; 2929 } 2930 memcpy(page+len, buf, cur_len); 2931 len += cur_len; 2932 } 2933 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 2934 2935 return len; 2936 } 2937 2938 SE_DEV_ALUA_TG_PT_ATTR_RO(members); 2939 2940 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp, 2941 tg_pt_gp_group); 2942 2943 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 2944 &target_core_alua_tg_pt_gp_alua_access_state.attr, 2945 &target_core_alua_tg_pt_gp_alua_access_status.attr, 2946 &target_core_alua_tg_pt_gp_alua_access_type.attr, 2947 &target_core_alua_tg_pt_gp_alua_support_transitioning.attr, 2948 &target_core_alua_tg_pt_gp_alua_support_offline.attr, 2949 &target_core_alua_tg_pt_gp_alua_support_lba_dependent.attr, 2950 &target_core_alua_tg_pt_gp_alua_support_unavailable.attr, 2951 &target_core_alua_tg_pt_gp_alua_support_standby.attr, 2952 &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized.attr, 2953 &target_core_alua_tg_pt_gp_alua_support_active_optimized.attr, 2954 &target_core_alua_tg_pt_gp_alua_write_metadata.attr, 2955 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr, 2956 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr, 2957 &target_core_alua_tg_pt_gp_implicit_trans_secs.attr, 2958 &target_core_alua_tg_pt_gp_preferred.attr, 2959 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr, 2960 &target_core_alua_tg_pt_gp_members.attr, 2961 NULL, 2962 }; 2963 2964 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 2965 { 2966 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2967 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2968 2969 core_alua_free_tg_pt_gp(tg_pt_gp); 2970 } 2971 2972 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 2973 .release = target_core_alua_tg_pt_gp_release, 2974 .show_attribute = target_core_alua_tg_pt_gp_attr_show, 2975 .store_attribute = target_core_alua_tg_pt_gp_attr_store, 2976 }; 2977 2978 static struct config_item_type target_core_alua_tg_pt_gp_cit = { 2979 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 2980 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 2981 .ct_owner = THIS_MODULE, 2982 }; 2983 2984 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2985 2986 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 2987 2988 static struct config_group *target_core_alua_create_tg_pt_gp( 2989 struct config_group *group, 2990 const char *name) 2991 { 2992 struct t10_alua *alua = container_of(group, struct t10_alua, 2993 alua_tg_pt_gps_group); 2994 struct t10_alua_tg_pt_gp *tg_pt_gp; 2995 struct config_group *alua_tg_pt_gp_cg = NULL; 2996 struct config_item *alua_tg_pt_gp_ci = NULL; 2997 2998 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0); 2999 if (!tg_pt_gp) 3000 return NULL; 3001 3002 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 3003 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 3004 3005 config_group_init_type_name(alua_tg_pt_gp_cg, name, 3006 &target_core_alua_tg_pt_gp_cit); 3007 3008 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 3009 " Group: alua/tg_pt_gps/%s\n", 3010 config_item_name(alua_tg_pt_gp_ci)); 3011 3012 return alua_tg_pt_gp_cg; 3013 } 3014 3015 static void target_core_alua_drop_tg_pt_gp( 3016 struct config_group *group, 3017 struct config_item *item) 3018 { 3019 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3020 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3021 3022 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 3023 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 3024 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 3025 /* 3026 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 3027 * -> target_core_alua_tg_pt_gp_release(). 3028 */ 3029 config_item_put(item); 3030 } 3031 3032 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 3033 .make_group = &target_core_alua_create_tg_pt_gp, 3034 .drop_item = &target_core_alua_drop_tg_pt_gp, 3035 }; 3036 3037 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL); 3038 3039 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3040 3041 /* Start functions for struct config_item_type target_core_alua_cit */ 3042 3043 /* 3044 * target_core_alua_cit is a ConfigFS group that lives under 3045 * /sys/kernel/config/target/core/alua. There are default groups 3046 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 3047 * target_core_alua_cit in target_core_init_configfs() below. 3048 */ 3049 static struct config_item_type target_core_alua_cit = { 3050 .ct_item_ops = NULL, 3051 .ct_attrs = NULL, 3052 .ct_owner = THIS_MODULE, 3053 }; 3054 3055 /* End functions for struct config_item_type target_core_alua_cit */ 3056 3057 /* Start functions for struct config_item_type tb_dev_stat_cit */ 3058 3059 static struct config_group *target_core_stat_mkdir( 3060 struct config_group *group, 3061 const char *name) 3062 { 3063 return ERR_PTR(-ENOSYS); 3064 } 3065 3066 static void target_core_stat_rmdir( 3067 struct config_group *group, 3068 struct config_item *item) 3069 { 3070 return; 3071 } 3072 3073 static struct configfs_group_operations target_core_stat_group_ops = { 3074 .make_group = &target_core_stat_mkdir, 3075 .drop_item = &target_core_stat_rmdir, 3076 }; 3077 3078 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL); 3079 3080 /* End functions for struct config_item_type tb_dev_stat_cit */ 3081 3082 /* Start functions for struct config_item_type target_core_hba_cit */ 3083 3084 static struct config_group *target_core_make_subdev( 3085 struct config_group *group, 3086 const char *name) 3087 { 3088 struct t10_alua_tg_pt_gp *tg_pt_gp; 3089 struct config_item *hba_ci = &group->cg_item; 3090 struct se_hba *hba = item_to_hba(hba_ci); 3091 struct target_backend *tb = hba->backend; 3092 struct se_device *dev; 3093 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL; 3094 struct config_group *dev_stat_grp = NULL; 3095 int errno = -ENOMEM, ret; 3096 3097 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 3098 if (ret) 3099 return ERR_PTR(ret); 3100 3101 dev = target_alloc_device(hba, name); 3102 if (!dev) 3103 goto out_unlock; 3104 3105 dev_cg = &dev->dev_group; 3106 3107 dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6, 3108 GFP_KERNEL); 3109 if (!dev_cg->default_groups) 3110 goto out_free_device; 3111 3112 config_group_init_type_name(dev_cg, name, &tb->tb_dev_cit); 3113 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib", 3114 &tb->tb_dev_attrib_cit); 3115 config_group_init_type_name(&dev->dev_pr_group, "pr", 3116 &tb->tb_dev_pr_cit); 3117 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn", 3118 &tb->tb_dev_wwn_cit); 3119 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group, 3120 "alua", &tb->tb_dev_alua_tg_pt_gps_cit); 3121 config_group_init_type_name(&dev->dev_stat_grps.stat_group, 3122 "statistics", &tb->tb_dev_stat_cit); 3123 3124 dev_cg->default_groups[0] = &dev->dev_attrib.da_group; 3125 dev_cg->default_groups[1] = &dev->dev_pr_group; 3126 dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group; 3127 dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group; 3128 dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group; 3129 dev_cg->default_groups[5] = NULL; 3130 /* 3131 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 3132 */ 3133 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1); 3134 if (!tg_pt_gp) 3135 goto out_free_dev_cg_default_groups; 3136 dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 3137 3138 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group; 3139 tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 3140 GFP_KERNEL); 3141 if (!tg_pt_gp_cg->default_groups) { 3142 pr_err("Unable to allocate tg_pt_gp_cg->" 3143 "default_groups\n"); 3144 goto out_free_tg_pt_gp; 3145 } 3146 3147 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 3148 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 3149 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group; 3150 tg_pt_gp_cg->default_groups[1] = NULL; 3151 /* 3152 * Add core/$HBA/$DEV/statistics/ default groups 3153 */ 3154 dev_stat_grp = &dev->dev_stat_grps.stat_group; 3155 dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4, 3156 GFP_KERNEL); 3157 if (!dev_stat_grp->default_groups) { 3158 pr_err("Unable to allocate dev_stat_grp->default_groups\n"); 3159 goto out_free_tg_pt_gp_cg_default_groups; 3160 } 3161 target_stat_setup_dev_default_groups(dev); 3162 3163 mutex_unlock(&hba->hba_access_mutex); 3164 return dev_cg; 3165 3166 out_free_tg_pt_gp_cg_default_groups: 3167 kfree(tg_pt_gp_cg->default_groups); 3168 out_free_tg_pt_gp: 3169 core_alua_free_tg_pt_gp(tg_pt_gp); 3170 out_free_dev_cg_default_groups: 3171 kfree(dev_cg->default_groups); 3172 out_free_device: 3173 target_free_device(dev); 3174 out_unlock: 3175 mutex_unlock(&hba->hba_access_mutex); 3176 return ERR_PTR(errno); 3177 } 3178 3179 static void target_core_drop_subdev( 3180 struct config_group *group, 3181 struct config_item *item) 3182 { 3183 struct config_group *dev_cg = to_config_group(item); 3184 struct se_device *dev = 3185 container_of(dev_cg, struct se_device, dev_group); 3186 struct se_hba *hba; 3187 struct config_item *df_item; 3188 struct config_group *tg_pt_gp_cg, *dev_stat_grp; 3189 int i; 3190 3191 hba = item_to_hba(&dev->se_hba->hba_group.cg_item); 3192 3193 mutex_lock(&hba->hba_access_mutex); 3194 3195 dev_stat_grp = &dev->dev_stat_grps.stat_group; 3196 for (i = 0; dev_stat_grp->default_groups[i]; i++) { 3197 df_item = &dev_stat_grp->default_groups[i]->cg_item; 3198 dev_stat_grp->default_groups[i] = NULL; 3199 config_item_put(df_item); 3200 } 3201 kfree(dev_stat_grp->default_groups); 3202 3203 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group; 3204 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) { 3205 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item; 3206 tg_pt_gp_cg->default_groups[i] = NULL; 3207 config_item_put(df_item); 3208 } 3209 kfree(tg_pt_gp_cg->default_groups); 3210 /* 3211 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 3212 * directly from target_core_alua_tg_pt_gp_release(). 3213 */ 3214 dev->t10_alua.default_tg_pt_gp = NULL; 3215 3216 for (i = 0; dev_cg->default_groups[i]; i++) { 3217 df_item = &dev_cg->default_groups[i]->cg_item; 3218 dev_cg->default_groups[i] = NULL; 3219 config_item_put(df_item); 3220 } 3221 /* 3222 * se_dev is released from target_core_dev_item_ops->release() 3223 */ 3224 config_item_put(item); 3225 mutex_unlock(&hba->hba_access_mutex); 3226 } 3227 3228 static struct configfs_group_operations target_core_hba_group_ops = { 3229 .make_group = target_core_make_subdev, 3230 .drop_item = target_core_drop_subdev, 3231 }; 3232 3233 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba); 3234 #define SE_HBA_ATTR(_name, _mode) \ 3235 static struct target_core_hba_attribute \ 3236 target_core_hba_##_name = \ 3237 __CONFIGFS_EATTR(_name, _mode, \ 3238 target_core_hba_show_attr_##_name, \ 3239 target_core_hba_store_attr_##_name); 3240 3241 #define SE_HBA_ATTR_RO(_name) \ 3242 static struct target_core_hba_attribute \ 3243 target_core_hba_##_name = \ 3244 __CONFIGFS_EATTR_RO(_name, \ 3245 target_core_hba_show_attr_##_name); 3246 3247 static ssize_t target_core_hba_show_attr_hba_info( 3248 struct se_hba *hba, 3249 char *page) 3250 { 3251 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 3252 hba->hba_id, hba->backend->ops->name, 3253 TARGET_CORE_VERSION); 3254 } 3255 3256 SE_HBA_ATTR_RO(hba_info); 3257 3258 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba, 3259 char *page) 3260 { 3261 int hba_mode = 0; 3262 3263 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 3264 hba_mode = 1; 3265 3266 return sprintf(page, "%d\n", hba_mode); 3267 } 3268 3269 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba, 3270 const char *page, size_t count) 3271 { 3272 unsigned long mode_flag; 3273 int ret; 3274 3275 if (hba->backend->ops->pmode_enable_hba == NULL) 3276 return -EINVAL; 3277 3278 ret = kstrtoul(page, 0, &mode_flag); 3279 if (ret < 0) { 3280 pr_err("Unable to extract hba mode flag: %d\n", ret); 3281 return ret; 3282 } 3283 3284 if (hba->dev_count) { 3285 pr_err("Unable to set hba_mode with active devices\n"); 3286 return -EINVAL; 3287 } 3288 3289 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag); 3290 if (ret < 0) 3291 return -EINVAL; 3292 if (ret > 0) 3293 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 3294 else if (ret == 0) 3295 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 3296 3297 return count; 3298 } 3299 3300 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR); 3301 3302 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group); 3303 3304 static void target_core_hba_release(struct config_item *item) 3305 { 3306 struct se_hba *hba = container_of(to_config_group(item), 3307 struct se_hba, hba_group); 3308 core_delete_hba(hba); 3309 } 3310 3311 static struct configfs_attribute *target_core_hba_attrs[] = { 3312 &target_core_hba_hba_info.attr, 3313 &target_core_hba_hba_mode.attr, 3314 NULL, 3315 }; 3316 3317 static struct configfs_item_operations target_core_hba_item_ops = { 3318 .release = target_core_hba_release, 3319 .show_attribute = target_core_hba_attr_show, 3320 .store_attribute = target_core_hba_attr_store, 3321 }; 3322 3323 static struct config_item_type target_core_hba_cit = { 3324 .ct_item_ops = &target_core_hba_item_ops, 3325 .ct_group_ops = &target_core_hba_group_ops, 3326 .ct_attrs = target_core_hba_attrs, 3327 .ct_owner = THIS_MODULE, 3328 }; 3329 3330 static struct config_group *target_core_call_addhbatotarget( 3331 struct config_group *group, 3332 const char *name) 3333 { 3334 char *se_plugin_str, *str, *str2; 3335 struct se_hba *hba; 3336 char buf[TARGET_CORE_NAME_MAX_LEN]; 3337 unsigned long plugin_dep_id = 0; 3338 int ret; 3339 3340 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN); 3341 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 3342 pr_err("Passed *name strlen(): %d exceeds" 3343 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 3344 TARGET_CORE_NAME_MAX_LEN); 3345 return ERR_PTR(-ENAMETOOLONG); 3346 } 3347 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 3348 3349 str = strstr(buf, "_"); 3350 if (!str) { 3351 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 3352 return ERR_PTR(-EINVAL); 3353 } 3354 se_plugin_str = buf; 3355 /* 3356 * Special case for subsystem plugins that have "_" in their names. 3357 * Namely rd_direct and rd_mcp.. 3358 */ 3359 str2 = strstr(str+1, "_"); 3360 if (str2) { 3361 *str2 = '\0'; /* Terminate for *se_plugin_str */ 3362 str2++; /* Skip to start of plugin dependent ID */ 3363 str = str2; 3364 } else { 3365 *str = '\0'; /* Terminate for *se_plugin_str */ 3366 str++; /* Skip to start of plugin dependent ID */ 3367 } 3368 3369 ret = kstrtoul(str, 0, &plugin_dep_id); 3370 if (ret < 0) { 3371 pr_err("kstrtoul() returned %d for" 3372 " plugin_dep_id\n", ret); 3373 return ERR_PTR(ret); 3374 } 3375 /* 3376 * Load up TCM subsystem plugins if they have not already been loaded. 3377 */ 3378 transport_subsystem_check_init(); 3379 3380 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 3381 if (IS_ERR(hba)) 3382 return ERR_CAST(hba); 3383 3384 config_group_init_type_name(&hba->hba_group, name, 3385 &target_core_hba_cit); 3386 3387 return &hba->hba_group; 3388 } 3389 3390 static void target_core_call_delhbafromtarget( 3391 struct config_group *group, 3392 struct config_item *item) 3393 { 3394 /* 3395 * core_delete_hba() is called from target_core_hba_item_ops->release() 3396 * -> target_core_hba_release() 3397 */ 3398 config_item_put(item); 3399 } 3400 3401 static struct configfs_group_operations target_core_group_ops = { 3402 .make_group = target_core_call_addhbatotarget, 3403 .drop_item = target_core_call_delhbafromtarget, 3404 }; 3405 3406 static struct config_item_type target_core_cit = { 3407 .ct_item_ops = NULL, 3408 .ct_group_ops = &target_core_group_ops, 3409 .ct_attrs = NULL, 3410 .ct_owner = THIS_MODULE, 3411 }; 3412 3413 /* Stop functions for struct config_item_type target_core_hba_cit */ 3414 3415 void target_setup_backend_cits(struct target_backend *tb) 3416 { 3417 target_core_setup_dev_cit(tb); 3418 target_core_setup_dev_attrib_cit(tb); 3419 target_core_setup_dev_pr_cit(tb); 3420 target_core_setup_dev_wwn_cit(tb); 3421 target_core_setup_dev_alua_tg_pt_gps_cit(tb); 3422 target_core_setup_dev_stat_cit(tb); 3423 } 3424 3425 static int __init target_core_init_configfs(void) 3426 { 3427 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL; 3428 struct config_group *lu_gp_cg = NULL; 3429 struct configfs_subsystem *subsys = &target_core_fabrics; 3430 struct t10_alua_lu_gp *lu_gp; 3431 int ret; 3432 3433 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 3434 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3435 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3436 3437 config_group_init(&subsys->su_group); 3438 mutex_init(&subsys->su_mutex); 3439 3440 ret = init_se_kmem_caches(); 3441 if (ret < 0) 3442 return ret; 3443 /* 3444 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3445 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3446 */ 3447 target_cg = &subsys->su_group; 3448 target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 3449 GFP_KERNEL); 3450 if (!target_cg->default_groups) { 3451 pr_err("Unable to allocate target_cg->default_groups\n"); 3452 ret = -ENOMEM; 3453 goto out_global; 3454 } 3455 3456 config_group_init_type_name(&target_core_hbagroup, 3457 "core", &target_core_cit); 3458 target_cg->default_groups[0] = &target_core_hbagroup; 3459 target_cg->default_groups[1] = NULL; 3460 /* 3461 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3462 */ 3463 hba_cg = &target_core_hbagroup; 3464 hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 3465 GFP_KERNEL); 3466 if (!hba_cg->default_groups) { 3467 pr_err("Unable to allocate hba_cg->default_groups\n"); 3468 ret = -ENOMEM; 3469 goto out_global; 3470 } 3471 config_group_init_type_name(&alua_group, 3472 "alua", &target_core_alua_cit); 3473 hba_cg->default_groups[0] = &alua_group; 3474 hba_cg->default_groups[1] = NULL; 3475 /* 3476 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3477 * groups under /sys/kernel/config/target/core/alua/ 3478 */ 3479 alua_cg = &alua_group; 3480 alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 3481 GFP_KERNEL); 3482 if (!alua_cg->default_groups) { 3483 pr_err("Unable to allocate alua_cg->default_groups\n"); 3484 ret = -ENOMEM; 3485 goto out_global; 3486 } 3487 3488 config_group_init_type_name(&alua_lu_gps_group, 3489 "lu_gps", &target_core_alua_lu_gps_cit); 3490 alua_cg->default_groups[0] = &alua_lu_gps_group; 3491 alua_cg->default_groups[1] = NULL; 3492 /* 3493 * Add core/alua/lu_gps/default_lu_gp 3494 */ 3495 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3496 if (IS_ERR(lu_gp)) { 3497 ret = -ENOMEM; 3498 goto out_global; 3499 } 3500 3501 lu_gp_cg = &alua_lu_gps_group; 3502 lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 3503 GFP_KERNEL); 3504 if (!lu_gp_cg->default_groups) { 3505 pr_err("Unable to allocate lu_gp_cg->default_groups\n"); 3506 ret = -ENOMEM; 3507 goto out_global; 3508 } 3509 3510 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3511 &target_core_alua_lu_gp_cit); 3512 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group; 3513 lu_gp_cg->default_groups[1] = NULL; 3514 default_lu_gp = lu_gp; 3515 /* 3516 * Register the target_core_mod subsystem with configfs. 3517 */ 3518 ret = configfs_register_subsystem(subsys); 3519 if (ret < 0) { 3520 pr_err("Error %d while registering subsystem %s\n", 3521 ret, subsys->su_group.cg_item.ci_namebuf); 3522 goto out_global; 3523 } 3524 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 3525 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s" 3526 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3527 /* 3528 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3529 */ 3530 ret = rd_module_init(); 3531 if (ret < 0) 3532 goto out; 3533 3534 ret = core_dev_setup_virtual_lun0(); 3535 if (ret < 0) 3536 goto out; 3537 3538 ret = target_xcopy_setup_pt(); 3539 if (ret < 0) 3540 goto out; 3541 3542 return 0; 3543 3544 out: 3545 configfs_unregister_subsystem(subsys); 3546 core_dev_release_virtual_lun0(); 3547 rd_module_exit(); 3548 out_global: 3549 if (default_lu_gp) { 3550 core_alua_free_lu_gp(default_lu_gp); 3551 default_lu_gp = NULL; 3552 } 3553 if (lu_gp_cg) 3554 kfree(lu_gp_cg->default_groups); 3555 if (alua_cg) 3556 kfree(alua_cg->default_groups); 3557 if (hba_cg) 3558 kfree(hba_cg->default_groups); 3559 kfree(target_cg->default_groups); 3560 release_se_kmem_caches(); 3561 return ret; 3562 } 3563 3564 static void __exit target_core_exit_configfs(void) 3565 { 3566 struct config_group *hba_cg, *alua_cg, *lu_gp_cg; 3567 struct config_item *item; 3568 int i; 3569 3570 lu_gp_cg = &alua_lu_gps_group; 3571 for (i = 0; lu_gp_cg->default_groups[i]; i++) { 3572 item = &lu_gp_cg->default_groups[i]->cg_item; 3573 lu_gp_cg->default_groups[i] = NULL; 3574 config_item_put(item); 3575 } 3576 kfree(lu_gp_cg->default_groups); 3577 lu_gp_cg->default_groups = NULL; 3578 3579 alua_cg = &alua_group; 3580 for (i = 0; alua_cg->default_groups[i]; i++) { 3581 item = &alua_cg->default_groups[i]->cg_item; 3582 alua_cg->default_groups[i] = NULL; 3583 config_item_put(item); 3584 } 3585 kfree(alua_cg->default_groups); 3586 alua_cg->default_groups = NULL; 3587 3588 hba_cg = &target_core_hbagroup; 3589 for (i = 0; hba_cg->default_groups[i]; i++) { 3590 item = &hba_cg->default_groups[i]->cg_item; 3591 hba_cg->default_groups[i] = NULL; 3592 config_item_put(item); 3593 } 3594 kfree(hba_cg->default_groups); 3595 hba_cg->default_groups = NULL; 3596 /* 3597 * We expect subsys->su_group.default_groups to be released 3598 * by configfs subsystem provider logic.. 3599 */ 3600 configfs_unregister_subsystem(&target_core_fabrics); 3601 kfree(target_core_fabrics.su_group.default_groups); 3602 3603 core_alua_free_lu_gp(default_lu_gp); 3604 default_lu_gp = NULL; 3605 3606 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3607 " Infrastructure\n"); 3608 3609 core_dev_release_virtual_lun0(); 3610 rd_module_exit(); 3611 target_xcopy_release_pt(); 3612 release_se_kmem_caches(); 3613 } 3614 3615 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3616 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3617 MODULE_LICENSE("GPL"); 3618 3619 module_init(target_core_init_configfs); 3620 module_exit(target_core_exit_configfs); 3621