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 mutex_unlock(&g_tf_lock); 461 /* 462 * Wait for any outstanding fabric se_deve_entry->rcu_head 463 * callbacks to complete post kfree_rcu(), before allowing 464 * fabric driver unload of TFO->module to proceed. 465 */ 466 rcu_barrier(); 467 kfree(t); 468 return; 469 } 470 } 471 mutex_unlock(&g_tf_lock); 472 } 473 EXPORT_SYMBOL(target_unregister_template); 474 475 /*############################################################################## 476 // Stop functions called by external Target Fabrics Modules 477 //############################################################################*/ 478 479 /* Start functions for struct config_item_type tb_dev_attrib_cit */ 480 #define DEF_TB_DEV_ATTRIB_SHOW(_name) \ 481 static ssize_t show_##_name(struct se_dev_attrib *da, char *page) \ 482 { \ 483 return snprintf(page, PAGE_SIZE, "%u\n", da->_name); \ 484 } 485 486 DEF_TB_DEV_ATTRIB_SHOW(emulate_model_alias); 487 DEF_TB_DEV_ATTRIB_SHOW(emulate_dpo); 488 DEF_TB_DEV_ATTRIB_SHOW(emulate_fua_write); 489 DEF_TB_DEV_ATTRIB_SHOW(emulate_fua_read); 490 DEF_TB_DEV_ATTRIB_SHOW(emulate_write_cache); 491 DEF_TB_DEV_ATTRIB_SHOW(emulate_ua_intlck_ctrl); 492 DEF_TB_DEV_ATTRIB_SHOW(emulate_tas); 493 DEF_TB_DEV_ATTRIB_SHOW(emulate_tpu); 494 DEF_TB_DEV_ATTRIB_SHOW(emulate_tpws); 495 DEF_TB_DEV_ATTRIB_SHOW(emulate_caw); 496 DEF_TB_DEV_ATTRIB_SHOW(emulate_3pc); 497 DEF_TB_DEV_ATTRIB_SHOW(pi_prot_type); 498 DEF_TB_DEV_ATTRIB_SHOW(hw_pi_prot_type); 499 DEF_TB_DEV_ATTRIB_SHOW(pi_prot_format); 500 DEF_TB_DEV_ATTRIB_SHOW(enforce_pr_isids); 501 DEF_TB_DEV_ATTRIB_SHOW(is_nonrot); 502 DEF_TB_DEV_ATTRIB_SHOW(emulate_rest_reord); 503 DEF_TB_DEV_ATTRIB_SHOW(force_pr_aptpl); 504 DEF_TB_DEV_ATTRIB_SHOW(hw_block_size); 505 DEF_TB_DEV_ATTRIB_SHOW(block_size); 506 DEF_TB_DEV_ATTRIB_SHOW(hw_max_sectors); 507 DEF_TB_DEV_ATTRIB_SHOW(optimal_sectors); 508 DEF_TB_DEV_ATTRIB_SHOW(hw_queue_depth); 509 DEF_TB_DEV_ATTRIB_SHOW(queue_depth); 510 DEF_TB_DEV_ATTRIB_SHOW(max_unmap_lba_count); 511 DEF_TB_DEV_ATTRIB_SHOW(max_unmap_block_desc_count); 512 DEF_TB_DEV_ATTRIB_SHOW(unmap_granularity); 513 DEF_TB_DEV_ATTRIB_SHOW(unmap_granularity_alignment); 514 DEF_TB_DEV_ATTRIB_SHOW(max_write_same_len); 515 516 #define DEF_TB_DEV_ATTRIB_STORE_U32(_name) \ 517 static ssize_t store_##_name(struct se_dev_attrib *da, const char *page,\ 518 size_t count) \ 519 { \ 520 u32 val; \ 521 int ret; \ 522 \ 523 ret = kstrtou32(page, 0, &val); \ 524 if (ret < 0) \ 525 return ret; \ 526 da->_name = val; \ 527 return count; \ 528 } 529 530 DEF_TB_DEV_ATTRIB_STORE_U32(max_unmap_lba_count); 531 DEF_TB_DEV_ATTRIB_STORE_U32(max_unmap_block_desc_count); 532 DEF_TB_DEV_ATTRIB_STORE_U32(unmap_granularity); 533 DEF_TB_DEV_ATTRIB_STORE_U32(unmap_granularity_alignment); 534 DEF_TB_DEV_ATTRIB_STORE_U32(max_write_same_len); 535 536 #define DEF_TB_DEV_ATTRIB_STORE_BOOL(_name) \ 537 static ssize_t store_##_name(struct se_dev_attrib *da, const char *page,\ 538 size_t count) \ 539 { \ 540 bool flag; \ 541 int ret; \ 542 \ 543 ret = strtobool(page, &flag); \ 544 if (ret < 0) \ 545 return ret; \ 546 da->_name = flag; \ 547 return count; \ 548 } 549 550 DEF_TB_DEV_ATTRIB_STORE_BOOL(emulate_fua_write); 551 DEF_TB_DEV_ATTRIB_STORE_BOOL(emulate_caw); 552 DEF_TB_DEV_ATTRIB_STORE_BOOL(emulate_3pc); 553 DEF_TB_DEV_ATTRIB_STORE_BOOL(enforce_pr_isids); 554 DEF_TB_DEV_ATTRIB_STORE_BOOL(is_nonrot); 555 556 #define DEF_TB_DEV_ATTRIB_STORE_STUB(_name) \ 557 static ssize_t store_##_name(struct se_dev_attrib *da, const char *page,\ 558 size_t count) \ 559 { \ 560 printk_once(KERN_WARNING \ 561 "ignoring deprecated ##_name## attribute\n"); \ 562 return count; \ 563 } 564 565 DEF_TB_DEV_ATTRIB_STORE_STUB(emulate_dpo); 566 DEF_TB_DEV_ATTRIB_STORE_STUB(emulate_fua_read); 567 568 static void dev_set_t10_wwn_model_alias(struct se_device *dev) 569 { 570 const char *configname; 571 572 configname = config_item_name(&dev->dev_group.cg_item); 573 if (strlen(configname) >= 16) { 574 pr_warn("dev[%p]: Backstore name '%s' is too long for " 575 "INQUIRY_MODEL, truncating to 16 bytes\n", dev, 576 configname); 577 } 578 snprintf(&dev->t10_wwn.model[0], 16, "%s", configname); 579 } 580 581 static ssize_t store_emulate_model_alias(struct se_dev_attrib *da, 582 const char *page, size_t count) 583 { 584 struct se_device *dev = da->da_dev; 585 bool flag; 586 int ret; 587 588 if (dev->export_count) { 589 pr_err("dev[%p]: Unable to change model alias" 590 " while export_count is %d\n", 591 dev, dev->export_count); 592 return -EINVAL; 593 } 594 595 ret = strtobool(page, &flag); 596 if (ret < 0) 597 return ret; 598 599 if (flag) { 600 dev_set_t10_wwn_model_alias(dev); 601 } else { 602 strncpy(&dev->t10_wwn.model[0], 603 dev->transport->inquiry_prod, 16); 604 } 605 da->emulate_model_alias = flag; 606 return count; 607 } 608 609 static ssize_t store_emulate_write_cache(struct se_dev_attrib *da, 610 const char *page, size_t count) 611 { 612 bool flag; 613 int ret; 614 615 ret = strtobool(page, &flag); 616 if (ret < 0) 617 return ret; 618 619 if (flag && da->da_dev->transport->get_write_cache) { 620 pr_err("emulate_write_cache not supported for this device\n"); 621 return -EINVAL; 622 } 623 624 da->emulate_write_cache = flag; 625 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 626 da->da_dev, flag); 627 return count; 628 } 629 630 static ssize_t store_emulate_ua_intlck_ctrl(struct se_dev_attrib *da, 631 const char *page, size_t count) 632 { 633 u32 val; 634 int ret; 635 636 ret = kstrtou32(page, 0, &val); 637 if (ret < 0) 638 return ret; 639 640 if (val != 0 && val != 1 && val != 2) { 641 pr_err("Illegal value %d\n", val); 642 return -EINVAL; 643 } 644 645 if (da->da_dev->export_count) { 646 pr_err("dev[%p]: Unable to change SE Device" 647 " UA_INTRLCK_CTRL while export_count is %d\n", 648 da->da_dev, da->da_dev->export_count); 649 return -EINVAL; 650 } 651 da->emulate_ua_intlck_ctrl = val; 652 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 653 da->da_dev, val); 654 return count; 655 } 656 657 static ssize_t store_emulate_tas(struct se_dev_attrib *da, 658 const char *page, size_t count) 659 { 660 bool flag; 661 int ret; 662 663 ret = strtobool(page, &flag); 664 if (ret < 0) 665 return ret; 666 667 if (da->da_dev->export_count) { 668 pr_err("dev[%p]: Unable to change SE Device TAS while" 669 " export_count is %d\n", 670 da->da_dev, da->da_dev->export_count); 671 return -EINVAL; 672 } 673 da->emulate_tas = flag; 674 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 675 da->da_dev, flag ? "Enabled" : "Disabled"); 676 677 return count; 678 } 679 680 static ssize_t store_emulate_tpu(struct se_dev_attrib *da, 681 const char *page, size_t count) 682 { 683 bool flag; 684 int ret; 685 686 ret = strtobool(page, &flag); 687 if (ret < 0) 688 return ret; 689 690 /* 691 * We expect this value to be non-zero when generic Block Layer 692 * Discard supported is detected iblock_create_virtdevice(). 693 */ 694 if (flag && !da->max_unmap_block_desc_count) { 695 pr_err("Generic Block Discard not supported\n"); 696 return -ENOSYS; 697 } 698 699 da->emulate_tpu = flag; 700 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 701 da->da_dev, flag); 702 return count; 703 } 704 705 static ssize_t store_emulate_tpws(struct se_dev_attrib *da, 706 const char *page, size_t count) 707 { 708 bool flag; 709 int ret; 710 711 ret = strtobool(page, &flag); 712 if (ret < 0) 713 return ret; 714 715 /* 716 * We expect this value to be non-zero when generic Block Layer 717 * Discard supported is detected iblock_create_virtdevice(). 718 */ 719 if (flag && !da->max_unmap_block_desc_count) { 720 pr_err("Generic Block Discard not supported\n"); 721 return -ENOSYS; 722 } 723 724 da->emulate_tpws = flag; 725 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 726 da->da_dev, flag); 727 return count; 728 } 729 730 static ssize_t store_pi_prot_type(struct se_dev_attrib *da, 731 const char *page, size_t count) 732 { 733 int old_prot = da->pi_prot_type, ret; 734 struct se_device *dev = da->da_dev; 735 u32 flag; 736 737 ret = kstrtou32(page, 0, &flag); 738 if (ret < 0) 739 return ret; 740 741 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) { 742 pr_err("Illegal value %d for pi_prot_type\n", flag); 743 return -EINVAL; 744 } 745 if (flag == 2) { 746 pr_err("DIF TYPE2 protection currently not supported\n"); 747 return -ENOSYS; 748 } 749 if (da->hw_pi_prot_type) { 750 pr_warn("DIF protection enabled on underlying hardware," 751 " ignoring\n"); 752 return count; 753 } 754 if (!dev->transport->init_prot || !dev->transport->free_prot) { 755 /* 0 is only allowed value for non-supporting backends */ 756 if (flag == 0) 757 return count; 758 759 pr_err("DIF protection not supported by backend: %s\n", 760 dev->transport->name); 761 return -ENOSYS; 762 } 763 if (!(dev->dev_flags & DF_CONFIGURED)) { 764 pr_err("DIF protection requires device to be configured\n"); 765 return -ENODEV; 766 } 767 if (dev->export_count) { 768 pr_err("dev[%p]: Unable to change SE Device PROT type while" 769 " export_count is %d\n", dev, dev->export_count); 770 return -EINVAL; 771 } 772 773 da->pi_prot_type = flag; 774 775 if (flag && !old_prot) { 776 ret = dev->transport->init_prot(dev); 777 if (ret) { 778 da->pi_prot_type = old_prot; 779 return ret; 780 } 781 782 } else if (!flag && old_prot) { 783 dev->transport->free_prot(dev); 784 } 785 786 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag); 787 return count; 788 } 789 790 static ssize_t store_pi_prot_format(struct se_dev_attrib *da, 791 const char *page, size_t count) 792 { 793 struct se_device *dev = da->da_dev; 794 bool flag; 795 int ret; 796 797 ret = strtobool(page, &flag); 798 if (ret < 0) 799 return ret; 800 801 if (!flag) 802 return count; 803 804 if (!dev->transport->format_prot) { 805 pr_err("DIF protection format not supported by backend %s\n", 806 dev->transport->name); 807 return -ENOSYS; 808 } 809 if (!(dev->dev_flags & DF_CONFIGURED)) { 810 pr_err("DIF protection format requires device to be configured\n"); 811 return -ENODEV; 812 } 813 if (dev->export_count) { 814 pr_err("dev[%p]: Unable to format SE Device PROT type while" 815 " export_count is %d\n", dev, dev->export_count); 816 return -EINVAL; 817 } 818 819 ret = dev->transport->format_prot(dev); 820 if (ret) 821 return ret; 822 823 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev); 824 return count; 825 } 826 827 static ssize_t store_force_pr_aptpl(struct se_dev_attrib *da, 828 const char *page, size_t count) 829 { 830 bool flag; 831 int ret; 832 833 ret = strtobool(page, &flag); 834 if (ret < 0) 835 return ret; 836 if (da->da_dev->export_count) { 837 pr_err("dev[%p]: Unable to set force_pr_aptpl while" 838 " export_count is %d\n", 839 da->da_dev, da->da_dev->export_count); 840 return -EINVAL; 841 } 842 843 da->force_pr_aptpl = flag; 844 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag); 845 return count; 846 } 847 848 static ssize_t store_emulate_rest_reord(struct se_dev_attrib *da, 849 const char *page, size_t count) 850 { 851 bool flag; 852 int ret; 853 854 ret = strtobool(page, &flag); 855 if (ret < 0) 856 return ret; 857 858 if (flag != 0) { 859 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted" 860 " reordering not implemented\n", da->da_dev); 861 return -ENOSYS; 862 } 863 da->emulate_rest_reord = flag; 864 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", 865 da->da_dev, flag); 866 return count; 867 } 868 869 /* 870 * Note, this can only be called on unexported SE Device Object. 871 */ 872 static ssize_t store_queue_depth(struct se_dev_attrib *da, 873 const char *page, size_t count) 874 { 875 struct se_device *dev = da->da_dev; 876 u32 val; 877 int ret; 878 879 ret = kstrtou32(page, 0, &val); 880 if (ret < 0) 881 return ret; 882 883 if (dev->export_count) { 884 pr_err("dev[%p]: Unable to change SE Device TCQ while" 885 " export_count is %d\n", 886 dev, dev->export_count); 887 return -EINVAL; 888 } 889 if (!val) { 890 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev); 891 return -EINVAL; 892 } 893 894 if (val > dev->dev_attrib.queue_depth) { 895 if (val > dev->dev_attrib.hw_queue_depth) { 896 pr_err("dev[%p]: Passed queue_depth:" 897 " %u exceeds TCM/SE_Device MAX" 898 " TCQ: %u\n", dev, val, 899 dev->dev_attrib.hw_queue_depth); 900 return -EINVAL; 901 } 902 } 903 da->queue_depth = dev->queue_depth = val; 904 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val); 905 return count; 906 } 907 908 static ssize_t store_optimal_sectors(struct se_dev_attrib *da, 909 const char *page, size_t count) 910 { 911 u32 val; 912 int ret; 913 914 ret = kstrtou32(page, 0, &val); 915 if (ret < 0) 916 return ret; 917 918 if (da->da_dev->export_count) { 919 pr_err("dev[%p]: Unable to change SE Device" 920 " optimal_sectors while export_count is %d\n", 921 da->da_dev, da->da_dev->export_count); 922 return -EINVAL; 923 } 924 if (val > da->hw_max_sectors) { 925 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 926 " greater than hw_max_sectors: %u\n", 927 da->da_dev, val, da->hw_max_sectors); 928 return -EINVAL; 929 } 930 931 da->optimal_sectors = val; 932 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 933 da->da_dev, val); 934 return count; 935 } 936 937 static ssize_t store_block_size(struct se_dev_attrib *da, 938 const char *page, size_t count) 939 { 940 u32 val; 941 int ret; 942 943 ret = kstrtou32(page, 0, &val); 944 if (ret < 0) 945 return ret; 946 947 if (da->da_dev->export_count) { 948 pr_err("dev[%p]: Unable to change SE Device block_size" 949 " while export_count is %d\n", 950 da->da_dev, da->da_dev->export_count); 951 return -EINVAL; 952 } 953 954 if (val != 512 && val != 1024 && val != 2048 && val != 4096) { 955 pr_err("dev[%p]: Illegal value for block_device: %u" 956 " for SE device, must be 512, 1024, 2048 or 4096\n", 957 da->da_dev, val); 958 return -EINVAL; 959 } 960 961 da->block_size = val; 962 if (da->max_bytes_per_io) 963 da->hw_max_sectors = da->max_bytes_per_io / val; 964 965 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 966 da->da_dev, val); 967 return count; 968 } 969 970 CONFIGFS_EATTR_STRUCT(target_backend_dev_attrib, se_dev_attrib); 971 #define TB_DEV_ATTR(_backend, _name, _mode) \ 972 static struct target_backend_dev_attrib_attribute _backend##_dev_attrib_##_name = \ 973 __CONFIGFS_EATTR(_name, _mode, \ 974 show_##_name, \ 975 store_##_name); 976 977 #define TB_DEV_ATTR_RO(_backend, _name) \ 978 static struct target_backend_dev_attrib_attribute _backend##_dev_attrib_##_name = \ 979 __CONFIGFS_EATTR_RO(_name, \ 980 show_##_name); 981 982 TB_DEV_ATTR(target_core, emulate_model_alias, S_IRUGO | S_IWUSR); 983 TB_DEV_ATTR(target_core, emulate_dpo, S_IRUGO | S_IWUSR); 984 TB_DEV_ATTR(target_core, emulate_fua_write, S_IRUGO | S_IWUSR); 985 TB_DEV_ATTR(target_core, emulate_fua_read, S_IRUGO | S_IWUSR); 986 TB_DEV_ATTR(target_core, emulate_write_cache, S_IRUGO | S_IWUSR); 987 TB_DEV_ATTR(target_core, emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR); 988 TB_DEV_ATTR(target_core, emulate_tas, S_IRUGO | S_IWUSR); 989 TB_DEV_ATTR(target_core, emulate_tpu, S_IRUGO | S_IWUSR); 990 TB_DEV_ATTR(target_core, emulate_tpws, S_IRUGO | S_IWUSR); 991 TB_DEV_ATTR(target_core, emulate_caw, S_IRUGO | S_IWUSR); 992 TB_DEV_ATTR(target_core, emulate_3pc, S_IRUGO | S_IWUSR); 993 TB_DEV_ATTR(target_core, pi_prot_type, S_IRUGO | S_IWUSR); 994 TB_DEV_ATTR_RO(target_core, hw_pi_prot_type); 995 TB_DEV_ATTR(target_core, pi_prot_format, S_IRUGO | S_IWUSR); 996 TB_DEV_ATTR(target_core, enforce_pr_isids, S_IRUGO | S_IWUSR); 997 TB_DEV_ATTR(target_core, is_nonrot, S_IRUGO | S_IWUSR); 998 TB_DEV_ATTR(target_core, emulate_rest_reord, S_IRUGO | S_IWUSR); 999 TB_DEV_ATTR(target_core, force_pr_aptpl, S_IRUGO | S_IWUSR) 1000 TB_DEV_ATTR_RO(target_core, hw_block_size); 1001 TB_DEV_ATTR(target_core, block_size, S_IRUGO | S_IWUSR) 1002 TB_DEV_ATTR_RO(target_core, hw_max_sectors); 1003 TB_DEV_ATTR(target_core, optimal_sectors, S_IRUGO | S_IWUSR); 1004 TB_DEV_ATTR_RO(target_core, hw_queue_depth); 1005 TB_DEV_ATTR(target_core, queue_depth, S_IRUGO | S_IWUSR); 1006 TB_DEV_ATTR(target_core, max_unmap_lba_count, S_IRUGO | S_IWUSR); 1007 TB_DEV_ATTR(target_core, max_unmap_block_desc_count, S_IRUGO | S_IWUSR); 1008 TB_DEV_ATTR(target_core, unmap_granularity, S_IRUGO | S_IWUSR); 1009 TB_DEV_ATTR(target_core, unmap_granularity_alignment, S_IRUGO | S_IWUSR); 1010 TB_DEV_ATTR(target_core, max_write_same_len, S_IRUGO | S_IWUSR); 1011 1012 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib); 1013 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group); 1014 1015 /* 1016 * dev_attrib attributes for devices using the target core SBC/SPC 1017 * interpreter. Any backend using spc_parse_cdb should be using 1018 * these. 1019 */ 1020 struct configfs_attribute *sbc_attrib_attrs[] = { 1021 &target_core_dev_attrib_emulate_model_alias.attr, 1022 &target_core_dev_attrib_emulate_dpo.attr, 1023 &target_core_dev_attrib_emulate_fua_write.attr, 1024 &target_core_dev_attrib_emulate_fua_read.attr, 1025 &target_core_dev_attrib_emulate_write_cache.attr, 1026 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr, 1027 &target_core_dev_attrib_emulate_tas.attr, 1028 &target_core_dev_attrib_emulate_tpu.attr, 1029 &target_core_dev_attrib_emulate_tpws.attr, 1030 &target_core_dev_attrib_emulate_caw.attr, 1031 &target_core_dev_attrib_emulate_3pc.attr, 1032 &target_core_dev_attrib_pi_prot_type.attr, 1033 &target_core_dev_attrib_hw_pi_prot_type.attr, 1034 &target_core_dev_attrib_pi_prot_format.attr, 1035 &target_core_dev_attrib_enforce_pr_isids.attr, 1036 &target_core_dev_attrib_is_nonrot.attr, 1037 &target_core_dev_attrib_emulate_rest_reord.attr, 1038 &target_core_dev_attrib_force_pr_aptpl.attr, 1039 &target_core_dev_attrib_hw_block_size.attr, 1040 &target_core_dev_attrib_block_size.attr, 1041 &target_core_dev_attrib_hw_max_sectors.attr, 1042 &target_core_dev_attrib_optimal_sectors.attr, 1043 &target_core_dev_attrib_hw_queue_depth.attr, 1044 &target_core_dev_attrib_queue_depth.attr, 1045 &target_core_dev_attrib_max_unmap_lba_count.attr, 1046 &target_core_dev_attrib_max_unmap_block_desc_count.attr, 1047 &target_core_dev_attrib_unmap_granularity.attr, 1048 &target_core_dev_attrib_unmap_granularity_alignment.attr, 1049 &target_core_dev_attrib_max_write_same_len.attr, 1050 NULL, 1051 }; 1052 EXPORT_SYMBOL(sbc_attrib_attrs); 1053 1054 TB_DEV_ATTR_RO(target_pt, hw_pi_prot_type); 1055 TB_DEV_ATTR_RO(target_pt, hw_block_size); 1056 TB_DEV_ATTR_RO(target_pt, hw_max_sectors); 1057 TB_DEV_ATTR_RO(target_pt, hw_queue_depth); 1058 1059 /* 1060 * Minimal dev_attrib attributes for devices passing through CDBs. 1061 * In this case we only provide a few read-only attributes for 1062 * backwards compatibility. 1063 */ 1064 struct configfs_attribute *passthrough_attrib_attrs[] = { 1065 &target_pt_dev_attrib_hw_pi_prot_type.attr, 1066 &target_pt_dev_attrib_hw_block_size.attr, 1067 &target_pt_dev_attrib_hw_max_sectors.attr, 1068 &target_pt_dev_attrib_hw_queue_depth.attr, 1069 NULL, 1070 }; 1071 EXPORT_SYMBOL(passthrough_attrib_attrs); 1072 1073 static struct configfs_item_operations target_core_dev_attrib_ops = { 1074 .show_attribute = target_core_dev_attrib_attr_show, 1075 .store_attribute = target_core_dev_attrib_attr_store, 1076 }; 1077 1078 TB_CIT_SETUP_DRV(dev_attrib, &target_core_dev_attrib_ops, NULL); 1079 1080 /* End functions for struct config_item_type tb_dev_attrib_cit */ 1081 1082 /* Start functions for struct config_item_type tb_dev_wwn_cit */ 1083 1084 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn); 1085 #define SE_DEV_WWN_ATTR(_name, _mode) \ 1086 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \ 1087 __CONFIGFS_EATTR(_name, _mode, \ 1088 target_core_dev_wwn_show_attr_##_name, \ 1089 target_core_dev_wwn_store_attr_##_name); 1090 1091 #define SE_DEV_WWN_ATTR_RO(_name); \ 1092 do { \ 1093 static struct target_core_dev_wwn_attribute \ 1094 target_core_dev_wwn_##_name = \ 1095 __CONFIGFS_EATTR_RO(_name, \ 1096 target_core_dev_wwn_show_attr_##_name); \ 1097 } while (0); 1098 1099 /* 1100 * VPD page 0x80 Unit serial 1101 */ 1102 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial( 1103 struct t10_wwn *t10_wwn, 1104 char *page) 1105 { 1106 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 1107 &t10_wwn->unit_serial[0]); 1108 } 1109 1110 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial( 1111 struct t10_wwn *t10_wwn, 1112 const char *page, 1113 size_t count) 1114 { 1115 struct se_device *dev = t10_wwn->t10_dev; 1116 unsigned char buf[INQUIRY_VPD_SERIAL_LEN]; 1117 1118 /* 1119 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 1120 * from the struct scsi_device level firmware, do not allow 1121 * VPD Unit Serial to be emulated. 1122 * 1123 * Note this struct scsi_device could also be emulating VPD 1124 * information from its drivers/scsi LLD. But for now we assume 1125 * it is doing 'the right thing' wrt a world wide unique 1126 * VPD Unit Serial Number that OS dependent multipath can depend on. 1127 */ 1128 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) { 1129 pr_err("Underlying SCSI device firmware provided VPD" 1130 " Unit Serial, ignoring request\n"); 1131 return -EOPNOTSUPP; 1132 } 1133 1134 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 1135 pr_err("Emulated VPD Unit Serial exceeds" 1136 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 1137 return -EOVERFLOW; 1138 } 1139 /* 1140 * Check to see if any active $FABRIC_MOD exports exist. If they 1141 * do exist, fail here as changing this information on the fly 1142 * (underneath the initiator side OS dependent multipath code) 1143 * could cause negative effects. 1144 */ 1145 if (dev->export_count) { 1146 pr_err("Unable to set VPD Unit Serial while" 1147 " active %d $FABRIC_MOD exports exist\n", 1148 dev->export_count); 1149 return -EINVAL; 1150 } 1151 1152 /* 1153 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 1154 * 1155 * Also, strip any newline added from the userspace 1156 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 1157 */ 1158 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN); 1159 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 1160 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 1161 "%s", strstrip(buf)); 1162 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL; 1163 1164 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 1165 " %s\n", dev->t10_wwn.unit_serial); 1166 1167 return count; 1168 } 1169 1170 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR); 1171 1172 /* 1173 * VPD page 0x83 Protocol Identifier 1174 */ 1175 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier( 1176 struct t10_wwn *t10_wwn, 1177 char *page) 1178 { 1179 struct t10_vpd *vpd; 1180 unsigned char buf[VPD_TMP_BUF_SIZE]; 1181 ssize_t len = 0; 1182 1183 memset(buf, 0, VPD_TMP_BUF_SIZE); 1184 1185 spin_lock(&t10_wwn->t10_vpd_lock); 1186 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 1187 if (!vpd->protocol_identifier_set) 1188 continue; 1189 1190 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 1191 1192 if (len + strlen(buf) >= PAGE_SIZE) 1193 break; 1194 1195 len += sprintf(page+len, "%s", buf); 1196 } 1197 spin_unlock(&t10_wwn->t10_vpd_lock); 1198 1199 return len; 1200 } 1201 1202 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier( 1203 struct t10_wwn *t10_wwn, 1204 const char *page, 1205 size_t count) 1206 { 1207 return -ENOSYS; 1208 } 1209 1210 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR); 1211 1212 /* 1213 * Generic wrapper for dumping VPD identifiers by association. 1214 */ 1215 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 1216 static ssize_t target_core_dev_wwn_show_attr_##_name( \ 1217 struct t10_wwn *t10_wwn, \ 1218 char *page) \ 1219 { \ 1220 struct t10_vpd *vpd; \ 1221 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 1222 ssize_t len = 0; \ 1223 \ 1224 spin_lock(&t10_wwn->t10_vpd_lock); \ 1225 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 1226 if (vpd->association != _assoc) \ 1227 continue; \ 1228 \ 1229 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1230 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 1231 if (len + strlen(buf) >= PAGE_SIZE) \ 1232 break; \ 1233 len += sprintf(page+len, "%s", buf); \ 1234 \ 1235 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1236 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 1237 if (len + strlen(buf) >= PAGE_SIZE) \ 1238 break; \ 1239 len += sprintf(page+len, "%s", buf); \ 1240 \ 1241 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1242 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 1243 if (len + strlen(buf) >= PAGE_SIZE) \ 1244 break; \ 1245 len += sprintf(page+len, "%s", buf); \ 1246 } \ 1247 spin_unlock(&t10_wwn->t10_vpd_lock); \ 1248 \ 1249 return len; \ 1250 } 1251 1252 /* 1253 * VPD page 0x83 Association: Logical Unit 1254 */ 1255 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 1256 1257 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit( 1258 struct t10_wwn *t10_wwn, 1259 const char *page, 1260 size_t count) 1261 { 1262 return -ENOSYS; 1263 } 1264 1265 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR); 1266 1267 /* 1268 * VPD page 0x83 Association: Target Port 1269 */ 1270 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 1271 1272 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port( 1273 struct t10_wwn *t10_wwn, 1274 const char *page, 1275 size_t count) 1276 { 1277 return -ENOSYS; 1278 } 1279 1280 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR); 1281 1282 /* 1283 * VPD page 0x83 Association: SCSI Target Device 1284 */ 1285 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 1286 1287 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device( 1288 struct t10_wwn *t10_wwn, 1289 const char *page, 1290 size_t count) 1291 { 1292 return -ENOSYS; 1293 } 1294 1295 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR); 1296 1297 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group); 1298 1299 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 1300 &target_core_dev_wwn_vpd_unit_serial.attr, 1301 &target_core_dev_wwn_vpd_protocol_identifier.attr, 1302 &target_core_dev_wwn_vpd_assoc_logical_unit.attr, 1303 &target_core_dev_wwn_vpd_assoc_target_port.attr, 1304 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr, 1305 NULL, 1306 }; 1307 1308 static struct configfs_item_operations target_core_dev_wwn_ops = { 1309 .show_attribute = target_core_dev_wwn_attr_show, 1310 .store_attribute = target_core_dev_wwn_attr_store, 1311 }; 1312 1313 TB_CIT_SETUP(dev_wwn, &target_core_dev_wwn_ops, NULL, target_core_dev_wwn_attrs); 1314 1315 /* End functions for struct config_item_type tb_dev_wwn_cit */ 1316 1317 /* Start functions for struct config_item_type tb_dev_pr_cit */ 1318 1319 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device); 1320 #define SE_DEV_PR_ATTR(_name, _mode) \ 1321 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 1322 __CONFIGFS_EATTR(_name, _mode, \ 1323 target_core_dev_pr_show_attr_##_name, \ 1324 target_core_dev_pr_store_attr_##_name); 1325 1326 #define SE_DEV_PR_ATTR_RO(_name); \ 1327 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 1328 __CONFIGFS_EATTR_RO(_name, \ 1329 target_core_dev_pr_show_attr_##_name); 1330 1331 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev, 1332 char *page) 1333 { 1334 struct se_node_acl *se_nacl; 1335 struct t10_pr_registration *pr_reg; 1336 char i_buf[PR_REG_ISID_ID_LEN]; 1337 1338 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1339 1340 pr_reg = dev->dev_pr_res_holder; 1341 if (!pr_reg) 1342 return sprintf(page, "No SPC-3 Reservation holder\n"); 1343 1344 se_nacl = pr_reg->pr_reg_nacl; 1345 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1346 1347 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", 1348 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 1349 se_nacl->initiatorname, i_buf); 1350 } 1351 1352 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, 1353 char *page) 1354 { 1355 struct se_node_acl *se_nacl; 1356 ssize_t len; 1357 1358 se_nacl = dev->dev_reserved_node_acl; 1359 if (se_nacl) { 1360 len = sprintf(page, 1361 "SPC-2 Reservation: %s Initiator: %s\n", 1362 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 1363 se_nacl->initiatorname); 1364 } else { 1365 len = sprintf(page, "No SPC-2 Reservation holder\n"); 1366 } 1367 return len; 1368 } 1369 1370 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev, 1371 char *page) 1372 { 1373 int ret; 1374 1375 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) 1376 return sprintf(page, "Passthrough\n"); 1377 1378 spin_lock(&dev->dev_reservation_lock); 1379 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1380 ret = target_core_dev_pr_show_spc2_res(dev, page); 1381 else 1382 ret = target_core_dev_pr_show_spc3_res(dev, page); 1383 spin_unlock(&dev->dev_reservation_lock); 1384 return ret; 1385 } 1386 1387 SE_DEV_PR_ATTR_RO(res_holder); 1388 1389 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts( 1390 struct se_device *dev, char *page) 1391 { 1392 ssize_t len = 0; 1393 1394 spin_lock(&dev->dev_reservation_lock); 1395 if (!dev->dev_pr_res_holder) { 1396 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1397 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { 1398 len = sprintf(page, "SPC-3 Reservation: All Target" 1399 " Ports registration\n"); 1400 } else { 1401 len = sprintf(page, "SPC-3 Reservation: Single" 1402 " Target Port registration\n"); 1403 } 1404 1405 spin_unlock(&dev->dev_reservation_lock); 1406 return len; 1407 } 1408 1409 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts); 1410 1411 static ssize_t target_core_dev_pr_show_attr_res_pr_generation( 1412 struct se_device *dev, char *page) 1413 { 1414 return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation); 1415 } 1416 1417 SE_DEV_PR_ATTR_RO(res_pr_generation); 1418 1419 /* 1420 * res_pr_holder_tg_port 1421 */ 1422 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port( 1423 struct se_device *dev, char *page) 1424 { 1425 struct se_node_acl *se_nacl; 1426 struct se_portal_group *se_tpg; 1427 struct t10_pr_registration *pr_reg; 1428 const struct target_core_fabric_ops *tfo; 1429 ssize_t len = 0; 1430 1431 spin_lock(&dev->dev_reservation_lock); 1432 pr_reg = dev->dev_pr_res_holder; 1433 if (!pr_reg) { 1434 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1435 goto out_unlock; 1436 } 1437 1438 se_nacl = pr_reg->pr_reg_nacl; 1439 se_tpg = se_nacl->se_tpg; 1440 tfo = se_tpg->se_tpg_tfo; 1441 1442 len += sprintf(page+len, "SPC-3 Reservation: %s" 1443 " Target Node Endpoint: %s\n", tfo->get_fabric_name(), 1444 tfo->tpg_get_wwn(se_tpg)); 1445 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1446 " Identifier Tag: %hu %s Portal Group Tag: %hu" 1447 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi, 1448 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg), 1449 tfo->get_fabric_name(), pr_reg->pr_aptpl_target_lun); 1450 1451 out_unlock: 1452 spin_unlock(&dev->dev_reservation_lock); 1453 return len; 1454 } 1455 1456 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port); 1457 1458 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts( 1459 struct se_device *dev, char *page) 1460 { 1461 const struct target_core_fabric_ops *tfo; 1462 struct t10_pr_registration *pr_reg; 1463 unsigned char buf[384]; 1464 char i_buf[PR_REG_ISID_ID_LEN]; 1465 ssize_t len = 0; 1466 int reg_count = 0; 1467 1468 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1469 1470 spin_lock(&dev->t10_pr.registration_lock); 1471 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1472 pr_reg_list) { 1473 1474 memset(buf, 0, 384); 1475 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1476 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1477 core_pr_dump_initiator_port(pr_reg, i_buf, 1478 PR_REG_ISID_ID_LEN); 1479 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1480 tfo->get_fabric_name(), 1481 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, 1482 pr_reg->pr_res_generation); 1483 1484 if (len + strlen(buf) >= PAGE_SIZE) 1485 break; 1486 1487 len += sprintf(page+len, "%s", buf); 1488 reg_count++; 1489 } 1490 spin_unlock(&dev->t10_pr.registration_lock); 1491 1492 if (!reg_count) 1493 len += sprintf(page+len, "None\n"); 1494 1495 return len; 1496 } 1497 1498 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts); 1499 1500 static ssize_t target_core_dev_pr_show_attr_res_pr_type( 1501 struct se_device *dev, char *page) 1502 { 1503 struct t10_pr_registration *pr_reg; 1504 ssize_t len = 0; 1505 1506 spin_lock(&dev->dev_reservation_lock); 1507 pr_reg = dev->dev_pr_res_holder; 1508 if (pr_reg) { 1509 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1510 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 1511 } else { 1512 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1513 } 1514 1515 spin_unlock(&dev->dev_reservation_lock); 1516 return len; 1517 } 1518 1519 SE_DEV_PR_ATTR_RO(res_pr_type); 1520 1521 static ssize_t target_core_dev_pr_show_attr_res_type( 1522 struct se_device *dev, char *page) 1523 { 1524 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) 1525 return sprintf(page, "SPC_PASSTHROUGH\n"); 1526 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1527 return sprintf(page, "SPC2_RESERVATIONS\n"); 1528 else 1529 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 1530 } 1531 1532 SE_DEV_PR_ATTR_RO(res_type); 1533 1534 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active( 1535 struct se_device *dev, char *page) 1536 { 1537 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) 1538 return 0; 1539 1540 return sprintf(page, "APTPL Bit Status: %s\n", 1541 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 1542 } 1543 1544 SE_DEV_PR_ATTR_RO(res_aptpl_active); 1545 1546 /* 1547 * res_aptpl_metadata 1548 */ 1549 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata( 1550 struct se_device *dev, char *page) 1551 { 1552 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) 1553 return 0; 1554 1555 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 1556 } 1557 1558 enum { 1559 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 1560 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 1561 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 1562 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 1563 }; 1564 1565 static match_table_t tokens = { 1566 {Opt_initiator_fabric, "initiator_fabric=%s"}, 1567 {Opt_initiator_node, "initiator_node=%s"}, 1568 {Opt_initiator_sid, "initiator_sid=%s"}, 1569 {Opt_sa_res_key, "sa_res_key=%s"}, 1570 {Opt_res_holder, "res_holder=%d"}, 1571 {Opt_res_type, "res_type=%d"}, 1572 {Opt_res_scope, "res_scope=%d"}, 1573 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 1574 {Opt_mapped_lun, "mapped_lun=%lld"}, 1575 {Opt_target_fabric, "target_fabric=%s"}, 1576 {Opt_target_node, "target_node=%s"}, 1577 {Opt_tpgt, "tpgt=%d"}, 1578 {Opt_port_rtpi, "port_rtpi=%d"}, 1579 {Opt_target_lun, "target_lun=%lld"}, 1580 {Opt_err, NULL} 1581 }; 1582 1583 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata( 1584 struct se_device *dev, 1585 const char *page, 1586 size_t count) 1587 { 1588 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 1589 unsigned char *t_fabric = NULL, *t_port = NULL; 1590 char *orig, *ptr, *opts; 1591 substring_t args[MAX_OPT_ARGS]; 1592 unsigned long long tmp_ll; 1593 u64 sa_res_key = 0; 1594 u64 mapped_lun = 0, target_lun = 0; 1595 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 1596 u16 tpgt = 0; 1597 u8 type = 0; 1598 1599 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) 1600 return count; 1601 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1602 return count; 1603 1604 if (dev->export_count) { 1605 pr_debug("Unable to process APTPL metadata while" 1606 " active fabric exports exist\n"); 1607 return -EINVAL; 1608 } 1609 1610 opts = kstrdup(page, GFP_KERNEL); 1611 if (!opts) 1612 return -ENOMEM; 1613 1614 orig = opts; 1615 while ((ptr = strsep(&opts, ",\n")) != NULL) { 1616 if (!*ptr) 1617 continue; 1618 1619 token = match_token(ptr, tokens, args); 1620 switch (token) { 1621 case Opt_initiator_fabric: 1622 i_fabric = match_strdup(args); 1623 if (!i_fabric) { 1624 ret = -ENOMEM; 1625 goto out; 1626 } 1627 break; 1628 case Opt_initiator_node: 1629 i_port = match_strdup(args); 1630 if (!i_port) { 1631 ret = -ENOMEM; 1632 goto out; 1633 } 1634 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 1635 pr_err("APTPL metadata initiator_node=" 1636 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 1637 PR_APTPL_MAX_IPORT_LEN); 1638 ret = -EINVAL; 1639 break; 1640 } 1641 break; 1642 case Opt_initiator_sid: 1643 isid = match_strdup(args); 1644 if (!isid) { 1645 ret = -ENOMEM; 1646 goto out; 1647 } 1648 if (strlen(isid) >= PR_REG_ISID_LEN) { 1649 pr_err("APTPL metadata initiator_isid" 1650 "= exceeds PR_REG_ISID_LEN: %d\n", 1651 PR_REG_ISID_LEN); 1652 ret = -EINVAL; 1653 break; 1654 } 1655 break; 1656 case Opt_sa_res_key: 1657 ret = kstrtoull(args->from, 0, &tmp_ll); 1658 if (ret < 0) { 1659 pr_err("kstrtoull() failed for sa_res_key=\n"); 1660 goto out; 1661 } 1662 sa_res_key = (u64)tmp_ll; 1663 break; 1664 /* 1665 * PR APTPL Metadata for Reservation 1666 */ 1667 case Opt_res_holder: 1668 ret = match_int(args, &arg); 1669 if (ret) 1670 goto out; 1671 res_holder = arg; 1672 break; 1673 case Opt_res_type: 1674 ret = match_int(args, &arg); 1675 if (ret) 1676 goto out; 1677 type = (u8)arg; 1678 break; 1679 case Opt_res_scope: 1680 ret = match_int(args, &arg); 1681 if (ret) 1682 goto out; 1683 break; 1684 case Opt_res_all_tg_pt: 1685 ret = match_int(args, &arg); 1686 if (ret) 1687 goto out; 1688 all_tg_pt = (int)arg; 1689 break; 1690 case Opt_mapped_lun: 1691 ret = match_int(args, &arg); 1692 if (ret) 1693 goto out; 1694 mapped_lun = (u64)arg; 1695 break; 1696 /* 1697 * PR APTPL Metadata for Target Port 1698 */ 1699 case Opt_target_fabric: 1700 t_fabric = match_strdup(args); 1701 if (!t_fabric) { 1702 ret = -ENOMEM; 1703 goto out; 1704 } 1705 break; 1706 case Opt_target_node: 1707 t_port = match_strdup(args); 1708 if (!t_port) { 1709 ret = -ENOMEM; 1710 goto out; 1711 } 1712 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 1713 pr_err("APTPL metadata target_node=" 1714 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 1715 PR_APTPL_MAX_TPORT_LEN); 1716 ret = -EINVAL; 1717 break; 1718 } 1719 break; 1720 case Opt_tpgt: 1721 ret = match_int(args, &arg); 1722 if (ret) 1723 goto out; 1724 tpgt = (u16)arg; 1725 break; 1726 case Opt_port_rtpi: 1727 ret = match_int(args, &arg); 1728 if (ret) 1729 goto out; 1730 break; 1731 case Opt_target_lun: 1732 ret = match_int(args, &arg); 1733 if (ret) 1734 goto out; 1735 target_lun = (u64)arg; 1736 break; 1737 default: 1738 break; 1739 } 1740 } 1741 1742 if (!i_port || !t_port || !sa_res_key) { 1743 pr_err("Illegal parameters for APTPL registration\n"); 1744 ret = -EINVAL; 1745 goto out; 1746 } 1747 1748 if (res_holder && !(type)) { 1749 pr_err("Illegal PR type: 0x%02x for reservation" 1750 " holder\n", type); 1751 ret = -EINVAL; 1752 goto out; 1753 } 1754 1755 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, 1756 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 1757 res_holder, all_tg_pt, type); 1758 out: 1759 kfree(i_fabric); 1760 kfree(i_port); 1761 kfree(isid); 1762 kfree(t_fabric); 1763 kfree(t_port); 1764 kfree(orig); 1765 return (ret == 0) ? count : ret; 1766 } 1767 1768 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR); 1769 1770 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group); 1771 1772 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 1773 &target_core_dev_pr_res_holder.attr, 1774 &target_core_dev_pr_res_pr_all_tgt_pts.attr, 1775 &target_core_dev_pr_res_pr_generation.attr, 1776 &target_core_dev_pr_res_pr_holder_tg_port.attr, 1777 &target_core_dev_pr_res_pr_registered_i_pts.attr, 1778 &target_core_dev_pr_res_pr_type.attr, 1779 &target_core_dev_pr_res_type.attr, 1780 &target_core_dev_pr_res_aptpl_active.attr, 1781 &target_core_dev_pr_res_aptpl_metadata.attr, 1782 NULL, 1783 }; 1784 1785 static struct configfs_item_operations target_core_dev_pr_ops = { 1786 .show_attribute = target_core_dev_pr_attr_show, 1787 .store_attribute = target_core_dev_pr_attr_store, 1788 }; 1789 1790 TB_CIT_SETUP(dev_pr, &target_core_dev_pr_ops, NULL, target_core_dev_pr_attrs); 1791 1792 /* End functions for struct config_item_type tb_dev_pr_cit */ 1793 1794 /* Start functions for struct config_item_type tb_dev_cit */ 1795 1796 static ssize_t target_core_show_dev_info(void *p, char *page) 1797 { 1798 struct se_device *dev = p; 1799 int bl = 0; 1800 ssize_t read_bytes = 0; 1801 1802 transport_dump_dev_state(dev, page, &bl); 1803 read_bytes += bl; 1804 read_bytes += dev->transport->show_configfs_dev_params(dev, 1805 page+read_bytes); 1806 return read_bytes; 1807 } 1808 1809 static struct target_core_configfs_attribute target_core_attr_dev_info = { 1810 .attr = { .ca_owner = THIS_MODULE, 1811 .ca_name = "info", 1812 .ca_mode = S_IRUGO }, 1813 .show = target_core_show_dev_info, 1814 .store = NULL, 1815 }; 1816 1817 static ssize_t target_core_store_dev_control( 1818 void *p, 1819 const char *page, 1820 size_t count) 1821 { 1822 struct se_device *dev = p; 1823 1824 return dev->transport->set_configfs_dev_params(dev, page, count); 1825 } 1826 1827 static struct target_core_configfs_attribute target_core_attr_dev_control = { 1828 .attr = { .ca_owner = THIS_MODULE, 1829 .ca_name = "control", 1830 .ca_mode = S_IWUSR }, 1831 .show = NULL, 1832 .store = target_core_store_dev_control, 1833 }; 1834 1835 static ssize_t target_core_show_dev_alias(void *p, char *page) 1836 { 1837 struct se_device *dev = p; 1838 1839 if (!(dev->dev_flags & DF_USING_ALIAS)) 1840 return 0; 1841 1842 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); 1843 } 1844 1845 static ssize_t target_core_store_dev_alias( 1846 void *p, 1847 const char *page, 1848 size_t count) 1849 { 1850 struct se_device *dev = p; 1851 struct se_hba *hba = dev->se_hba; 1852 ssize_t read_bytes; 1853 1854 if (count > (SE_DEV_ALIAS_LEN-1)) { 1855 pr_err("alias count: %d exceeds" 1856 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 1857 SE_DEV_ALIAS_LEN-1); 1858 return -EINVAL; 1859 } 1860 1861 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); 1862 if (!read_bytes) 1863 return -EINVAL; 1864 if (dev->dev_alias[read_bytes - 1] == '\n') 1865 dev->dev_alias[read_bytes - 1] = '\0'; 1866 1867 dev->dev_flags |= DF_USING_ALIAS; 1868 1869 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 1870 config_item_name(&hba->hba_group.cg_item), 1871 config_item_name(&dev->dev_group.cg_item), 1872 dev->dev_alias); 1873 1874 return read_bytes; 1875 } 1876 1877 static struct target_core_configfs_attribute target_core_attr_dev_alias = { 1878 .attr = { .ca_owner = THIS_MODULE, 1879 .ca_name = "alias", 1880 .ca_mode = S_IRUGO | S_IWUSR }, 1881 .show = target_core_show_dev_alias, 1882 .store = target_core_store_dev_alias, 1883 }; 1884 1885 static ssize_t target_core_show_dev_udev_path(void *p, char *page) 1886 { 1887 struct se_device *dev = p; 1888 1889 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) 1890 return 0; 1891 1892 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); 1893 } 1894 1895 static ssize_t target_core_store_dev_udev_path( 1896 void *p, 1897 const char *page, 1898 size_t count) 1899 { 1900 struct se_device *dev = p; 1901 struct se_hba *hba = dev->se_hba; 1902 ssize_t read_bytes; 1903 1904 if (count > (SE_UDEV_PATH_LEN-1)) { 1905 pr_err("udev_path count: %d exceeds" 1906 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 1907 SE_UDEV_PATH_LEN-1); 1908 return -EINVAL; 1909 } 1910 1911 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, 1912 "%s", page); 1913 if (!read_bytes) 1914 return -EINVAL; 1915 if (dev->udev_path[read_bytes - 1] == '\n') 1916 dev->udev_path[read_bytes - 1] = '\0'; 1917 1918 dev->dev_flags |= DF_USING_UDEV_PATH; 1919 1920 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 1921 config_item_name(&hba->hba_group.cg_item), 1922 config_item_name(&dev->dev_group.cg_item), 1923 dev->udev_path); 1924 1925 return read_bytes; 1926 } 1927 1928 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = { 1929 .attr = { .ca_owner = THIS_MODULE, 1930 .ca_name = "udev_path", 1931 .ca_mode = S_IRUGO | S_IWUSR }, 1932 .show = target_core_show_dev_udev_path, 1933 .store = target_core_store_dev_udev_path, 1934 }; 1935 1936 static ssize_t target_core_show_dev_enable(void *p, char *page) 1937 { 1938 struct se_device *dev = p; 1939 1940 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED)); 1941 } 1942 1943 static ssize_t target_core_store_dev_enable( 1944 void *p, 1945 const char *page, 1946 size_t count) 1947 { 1948 struct se_device *dev = p; 1949 char *ptr; 1950 int ret; 1951 1952 ptr = strstr(page, "1"); 1953 if (!ptr) { 1954 pr_err("For dev_enable ops, only valid value" 1955 " is \"1\"\n"); 1956 return -EINVAL; 1957 } 1958 1959 ret = target_configure_device(dev); 1960 if (ret) 1961 return ret; 1962 return count; 1963 } 1964 1965 static struct target_core_configfs_attribute target_core_attr_dev_enable = { 1966 .attr = { .ca_owner = THIS_MODULE, 1967 .ca_name = "enable", 1968 .ca_mode = S_IRUGO | S_IWUSR }, 1969 .show = target_core_show_dev_enable, 1970 .store = target_core_store_dev_enable, 1971 }; 1972 1973 static ssize_t target_core_show_alua_lu_gp(void *p, char *page) 1974 { 1975 struct se_device *dev = p; 1976 struct config_item *lu_ci; 1977 struct t10_alua_lu_gp *lu_gp; 1978 struct t10_alua_lu_gp_member *lu_gp_mem; 1979 ssize_t len = 0; 1980 1981 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1982 if (!lu_gp_mem) 1983 return 0; 1984 1985 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1986 lu_gp = lu_gp_mem->lu_gp; 1987 if (lu_gp) { 1988 lu_ci = &lu_gp->lu_gp_group.cg_item; 1989 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 1990 config_item_name(lu_ci), lu_gp->lu_gp_id); 1991 } 1992 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1993 1994 return len; 1995 } 1996 1997 static ssize_t target_core_store_alua_lu_gp( 1998 void *p, 1999 const char *page, 2000 size_t count) 2001 { 2002 struct se_device *dev = p; 2003 struct se_hba *hba = dev->se_hba; 2004 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 2005 struct t10_alua_lu_gp_member *lu_gp_mem; 2006 unsigned char buf[LU_GROUP_NAME_BUF]; 2007 int move = 0; 2008 2009 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2010 if (!lu_gp_mem) 2011 return count; 2012 2013 if (count > LU_GROUP_NAME_BUF) { 2014 pr_err("ALUA LU Group Alias too large!\n"); 2015 return -EINVAL; 2016 } 2017 memset(buf, 0, LU_GROUP_NAME_BUF); 2018 memcpy(buf, page, count); 2019 /* 2020 * Any ALUA logical unit alias besides "NULL" means we will be 2021 * making a new group association. 2022 */ 2023 if (strcmp(strstrip(buf), "NULL")) { 2024 /* 2025 * core_alua_get_lu_gp_by_name() will increment reference to 2026 * struct t10_alua_lu_gp. This reference is released with 2027 * core_alua_get_lu_gp_by_name below(). 2028 */ 2029 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 2030 if (!lu_gp_new) 2031 return -ENODEV; 2032 } 2033 2034 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2035 lu_gp = lu_gp_mem->lu_gp; 2036 if (lu_gp) { 2037 /* 2038 * Clearing an existing lu_gp association, and replacing 2039 * with NULL 2040 */ 2041 if (!lu_gp_new) { 2042 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 2043 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 2044 " %hu\n", 2045 config_item_name(&hba->hba_group.cg_item), 2046 config_item_name(&dev->dev_group.cg_item), 2047 config_item_name(&lu_gp->lu_gp_group.cg_item), 2048 lu_gp->lu_gp_id); 2049 2050 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2051 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2052 2053 return count; 2054 } 2055 /* 2056 * Removing existing association of lu_gp_mem with lu_gp 2057 */ 2058 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2059 move = 1; 2060 } 2061 /* 2062 * Associate lu_gp_mem with lu_gp_new. 2063 */ 2064 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 2065 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2066 2067 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 2068 " core/alua/lu_gps/%s, ID: %hu\n", 2069 (move) ? "Moving" : "Adding", 2070 config_item_name(&hba->hba_group.cg_item), 2071 config_item_name(&dev->dev_group.cg_item), 2072 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 2073 lu_gp_new->lu_gp_id); 2074 2075 core_alua_put_lu_gp_from_name(lu_gp_new); 2076 return count; 2077 } 2078 2079 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = { 2080 .attr = { .ca_owner = THIS_MODULE, 2081 .ca_name = "alua_lu_gp", 2082 .ca_mode = S_IRUGO | S_IWUSR }, 2083 .show = target_core_show_alua_lu_gp, 2084 .store = target_core_store_alua_lu_gp, 2085 }; 2086 2087 static ssize_t target_core_show_dev_lba_map(void *p, char *page) 2088 { 2089 struct se_device *dev = p; 2090 struct t10_alua_lba_map *map; 2091 struct t10_alua_lba_map_member *mem; 2092 char *b = page; 2093 int bl = 0; 2094 char state; 2095 2096 spin_lock(&dev->t10_alua.lba_map_lock); 2097 if (!list_empty(&dev->t10_alua.lba_map_list)) 2098 bl += sprintf(b + bl, "%u %u\n", 2099 dev->t10_alua.lba_map_segment_size, 2100 dev->t10_alua.lba_map_segment_multiplier); 2101 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) { 2102 bl += sprintf(b + bl, "%llu %llu", 2103 map->lba_map_first_lba, map->lba_map_last_lba); 2104 list_for_each_entry(mem, &map->lba_map_mem_list, 2105 lba_map_mem_list) { 2106 switch (mem->lba_map_mem_alua_state) { 2107 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: 2108 state = 'O'; 2109 break; 2110 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: 2111 state = 'A'; 2112 break; 2113 case ALUA_ACCESS_STATE_STANDBY: 2114 state = 'S'; 2115 break; 2116 case ALUA_ACCESS_STATE_UNAVAILABLE: 2117 state = 'U'; 2118 break; 2119 default: 2120 state = '.'; 2121 break; 2122 } 2123 bl += sprintf(b + bl, " %d:%c", 2124 mem->lba_map_mem_alua_pg_id, state); 2125 } 2126 bl += sprintf(b + bl, "\n"); 2127 } 2128 spin_unlock(&dev->t10_alua.lba_map_lock); 2129 return bl; 2130 } 2131 2132 static ssize_t target_core_store_dev_lba_map( 2133 void *p, 2134 const char *page, 2135 size_t count) 2136 { 2137 struct se_device *dev = p; 2138 struct t10_alua_lba_map *lba_map = NULL; 2139 struct list_head lba_list; 2140 char *map_entries, *ptr; 2141 char state; 2142 int pg_num = -1, pg; 2143 int ret = 0, num = 0, pg_id, alua_state; 2144 unsigned long start_lba = -1, end_lba = -1; 2145 unsigned long segment_size = -1, segment_mult = -1; 2146 2147 map_entries = kstrdup(page, GFP_KERNEL); 2148 if (!map_entries) 2149 return -ENOMEM; 2150 2151 INIT_LIST_HEAD(&lba_list); 2152 while ((ptr = strsep(&map_entries, "\n")) != NULL) { 2153 if (!*ptr) 2154 continue; 2155 2156 if (num == 0) { 2157 if (sscanf(ptr, "%lu %lu\n", 2158 &segment_size, &segment_mult) != 2) { 2159 pr_err("Invalid line %d\n", num); 2160 ret = -EINVAL; 2161 break; 2162 } 2163 num++; 2164 continue; 2165 } 2166 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) { 2167 pr_err("Invalid line %d\n", num); 2168 ret = -EINVAL; 2169 break; 2170 } 2171 ptr = strchr(ptr, ' '); 2172 if (!ptr) { 2173 pr_err("Invalid line %d, missing end lba\n", num); 2174 ret = -EINVAL; 2175 break; 2176 } 2177 ptr++; 2178 ptr = strchr(ptr, ' '); 2179 if (!ptr) { 2180 pr_err("Invalid line %d, missing state definitions\n", 2181 num); 2182 ret = -EINVAL; 2183 break; 2184 } 2185 ptr++; 2186 lba_map = core_alua_allocate_lba_map(&lba_list, 2187 start_lba, end_lba); 2188 if (IS_ERR(lba_map)) { 2189 ret = PTR_ERR(lba_map); 2190 break; 2191 } 2192 pg = 0; 2193 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) { 2194 switch (state) { 2195 case 'O': 2196 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED; 2197 break; 2198 case 'A': 2199 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED; 2200 break; 2201 case 'S': 2202 alua_state = ALUA_ACCESS_STATE_STANDBY; 2203 break; 2204 case 'U': 2205 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE; 2206 break; 2207 default: 2208 pr_err("Invalid ALUA state '%c'\n", state); 2209 ret = -EINVAL; 2210 goto out; 2211 } 2212 2213 ret = core_alua_allocate_lba_map_mem(lba_map, 2214 pg_id, alua_state); 2215 if (ret) { 2216 pr_err("Invalid target descriptor %d:%c " 2217 "at line %d\n", 2218 pg_id, state, num); 2219 break; 2220 } 2221 pg++; 2222 ptr = strchr(ptr, ' '); 2223 if (ptr) 2224 ptr++; 2225 else 2226 break; 2227 } 2228 if (pg_num == -1) 2229 pg_num = pg; 2230 else if (pg != pg_num) { 2231 pr_err("Only %d from %d port groups definitions " 2232 "at line %d\n", pg, pg_num, num); 2233 ret = -EINVAL; 2234 break; 2235 } 2236 num++; 2237 } 2238 out: 2239 if (ret) { 2240 core_alua_free_lba_map(&lba_list); 2241 count = ret; 2242 } else 2243 core_alua_set_lba_map(dev, &lba_list, 2244 segment_size, segment_mult); 2245 kfree(map_entries); 2246 return count; 2247 } 2248 2249 static struct target_core_configfs_attribute target_core_attr_dev_lba_map = { 2250 .attr = { .ca_owner = THIS_MODULE, 2251 .ca_name = "lba_map", 2252 .ca_mode = S_IRUGO | S_IWUSR }, 2253 .show = target_core_show_dev_lba_map, 2254 .store = target_core_store_dev_lba_map, 2255 }; 2256 2257 static struct configfs_attribute *target_core_dev_attrs[] = { 2258 &target_core_attr_dev_info.attr, 2259 &target_core_attr_dev_control.attr, 2260 &target_core_attr_dev_alias.attr, 2261 &target_core_attr_dev_udev_path.attr, 2262 &target_core_attr_dev_enable.attr, 2263 &target_core_attr_dev_alua_lu_gp.attr, 2264 &target_core_attr_dev_lba_map.attr, 2265 NULL, 2266 }; 2267 2268 static void target_core_dev_release(struct config_item *item) 2269 { 2270 struct config_group *dev_cg = to_config_group(item); 2271 struct se_device *dev = 2272 container_of(dev_cg, struct se_device, dev_group); 2273 2274 kfree(dev_cg->default_groups); 2275 target_free_device(dev); 2276 } 2277 2278 static ssize_t target_core_dev_show(struct config_item *item, 2279 struct configfs_attribute *attr, 2280 char *page) 2281 { 2282 struct config_group *dev_cg = to_config_group(item); 2283 struct se_device *dev = 2284 container_of(dev_cg, struct se_device, dev_group); 2285 struct target_core_configfs_attribute *tc_attr = container_of( 2286 attr, struct target_core_configfs_attribute, attr); 2287 2288 if (!tc_attr->show) 2289 return -EINVAL; 2290 2291 return tc_attr->show(dev, page); 2292 } 2293 2294 static ssize_t target_core_dev_store(struct config_item *item, 2295 struct configfs_attribute *attr, 2296 const char *page, size_t count) 2297 { 2298 struct config_group *dev_cg = to_config_group(item); 2299 struct se_device *dev = 2300 container_of(dev_cg, struct se_device, dev_group); 2301 struct target_core_configfs_attribute *tc_attr = container_of( 2302 attr, struct target_core_configfs_attribute, attr); 2303 2304 if (!tc_attr->store) 2305 return -EINVAL; 2306 2307 return tc_attr->store(dev, page, count); 2308 } 2309 2310 static struct configfs_item_operations target_core_dev_item_ops = { 2311 .release = target_core_dev_release, 2312 .show_attribute = target_core_dev_show, 2313 .store_attribute = target_core_dev_store, 2314 }; 2315 2316 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs); 2317 2318 /* End functions for struct config_item_type tb_dev_cit */ 2319 2320 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 2321 2322 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp); 2323 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \ 2324 static struct target_core_alua_lu_gp_attribute \ 2325 target_core_alua_lu_gp_##_name = \ 2326 __CONFIGFS_EATTR(_name, _mode, \ 2327 target_core_alua_lu_gp_show_attr_##_name, \ 2328 target_core_alua_lu_gp_store_attr_##_name); 2329 2330 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \ 2331 static struct target_core_alua_lu_gp_attribute \ 2332 target_core_alua_lu_gp_##_name = \ 2333 __CONFIGFS_EATTR_RO(_name, \ 2334 target_core_alua_lu_gp_show_attr_##_name); 2335 2336 /* 2337 * lu_gp_id 2338 */ 2339 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id( 2340 struct t10_alua_lu_gp *lu_gp, 2341 char *page) 2342 { 2343 if (!lu_gp->lu_gp_valid_id) 2344 return 0; 2345 2346 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2347 } 2348 2349 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id( 2350 struct t10_alua_lu_gp *lu_gp, 2351 const char *page, 2352 size_t count) 2353 { 2354 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2355 unsigned long lu_gp_id; 2356 int ret; 2357 2358 ret = kstrtoul(page, 0, &lu_gp_id); 2359 if (ret < 0) { 2360 pr_err("kstrtoul() returned %d for" 2361 " lu_gp_id\n", ret); 2362 return ret; 2363 } 2364 if (lu_gp_id > 0x0000ffff) { 2365 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 2366 " 0x0000ffff\n", lu_gp_id); 2367 return -EINVAL; 2368 } 2369 2370 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2371 if (ret < 0) 2372 return -EINVAL; 2373 2374 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 2375 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2376 config_item_name(&alua_lu_gp_cg->cg_item), 2377 lu_gp->lu_gp_id); 2378 2379 return count; 2380 } 2381 2382 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR); 2383 2384 /* 2385 * members 2386 */ 2387 static ssize_t target_core_alua_lu_gp_show_attr_members( 2388 struct t10_alua_lu_gp *lu_gp, 2389 char *page) 2390 { 2391 struct se_device *dev; 2392 struct se_hba *hba; 2393 struct t10_alua_lu_gp_member *lu_gp_mem; 2394 ssize_t len = 0, cur_len; 2395 unsigned char buf[LU_GROUP_NAME_BUF]; 2396 2397 memset(buf, 0, LU_GROUP_NAME_BUF); 2398 2399 spin_lock(&lu_gp->lu_gp_lock); 2400 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2401 dev = lu_gp_mem->lu_gp_mem_dev; 2402 hba = dev->se_hba; 2403 2404 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 2405 config_item_name(&hba->hba_group.cg_item), 2406 config_item_name(&dev->dev_group.cg_item)); 2407 cur_len++; /* Extra byte for NULL terminator */ 2408 2409 if ((cur_len + len) > PAGE_SIZE) { 2410 pr_warn("Ran out of lu_gp_show_attr" 2411 "_members buffer\n"); 2412 break; 2413 } 2414 memcpy(page+len, buf, cur_len); 2415 len += cur_len; 2416 } 2417 spin_unlock(&lu_gp->lu_gp_lock); 2418 2419 return len; 2420 } 2421 2422 SE_DEV_ALUA_LU_ATTR_RO(members); 2423 2424 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group); 2425 2426 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2427 &target_core_alua_lu_gp_lu_gp_id.attr, 2428 &target_core_alua_lu_gp_members.attr, 2429 NULL, 2430 }; 2431 2432 static void target_core_alua_lu_gp_release(struct config_item *item) 2433 { 2434 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2435 struct t10_alua_lu_gp, lu_gp_group); 2436 2437 core_alua_free_lu_gp(lu_gp); 2438 } 2439 2440 static struct configfs_item_operations target_core_alua_lu_gp_ops = { 2441 .release = target_core_alua_lu_gp_release, 2442 .show_attribute = target_core_alua_lu_gp_attr_show, 2443 .store_attribute = target_core_alua_lu_gp_attr_store, 2444 }; 2445 2446 static struct config_item_type target_core_alua_lu_gp_cit = { 2447 .ct_item_ops = &target_core_alua_lu_gp_ops, 2448 .ct_attrs = target_core_alua_lu_gp_attrs, 2449 .ct_owner = THIS_MODULE, 2450 }; 2451 2452 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2453 2454 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2455 2456 static struct config_group *target_core_alua_create_lu_gp( 2457 struct config_group *group, 2458 const char *name) 2459 { 2460 struct t10_alua_lu_gp *lu_gp; 2461 struct config_group *alua_lu_gp_cg = NULL; 2462 struct config_item *alua_lu_gp_ci = NULL; 2463 2464 lu_gp = core_alua_allocate_lu_gp(name, 0); 2465 if (IS_ERR(lu_gp)) 2466 return NULL; 2467 2468 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2469 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2470 2471 config_group_init_type_name(alua_lu_gp_cg, name, 2472 &target_core_alua_lu_gp_cit); 2473 2474 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2475 " Group: core/alua/lu_gps/%s\n", 2476 config_item_name(alua_lu_gp_ci)); 2477 2478 return alua_lu_gp_cg; 2479 2480 } 2481 2482 static void target_core_alua_drop_lu_gp( 2483 struct config_group *group, 2484 struct config_item *item) 2485 { 2486 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2487 struct t10_alua_lu_gp, lu_gp_group); 2488 2489 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2490 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2491 config_item_name(item), lu_gp->lu_gp_id); 2492 /* 2493 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 2494 * -> target_core_alua_lu_gp_release() 2495 */ 2496 config_item_put(item); 2497 } 2498 2499 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2500 .make_group = &target_core_alua_create_lu_gp, 2501 .drop_item = &target_core_alua_drop_lu_gp, 2502 }; 2503 2504 static struct config_item_type target_core_alua_lu_gps_cit = { 2505 .ct_item_ops = NULL, 2506 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2507 .ct_owner = THIS_MODULE, 2508 }; 2509 2510 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2511 2512 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2513 2514 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp); 2515 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \ 2516 static struct target_core_alua_tg_pt_gp_attribute \ 2517 target_core_alua_tg_pt_gp_##_name = \ 2518 __CONFIGFS_EATTR(_name, _mode, \ 2519 target_core_alua_tg_pt_gp_show_attr_##_name, \ 2520 target_core_alua_tg_pt_gp_store_attr_##_name); 2521 2522 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \ 2523 static struct target_core_alua_tg_pt_gp_attribute \ 2524 target_core_alua_tg_pt_gp_##_name = \ 2525 __CONFIGFS_EATTR_RO(_name, \ 2526 target_core_alua_tg_pt_gp_show_attr_##_name); 2527 2528 /* 2529 * alua_access_state 2530 */ 2531 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state( 2532 struct t10_alua_tg_pt_gp *tg_pt_gp, 2533 char *page) 2534 { 2535 return sprintf(page, "%d\n", 2536 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state)); 2537 } 2538 2539 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state( 2540 struct t10_alua_tg_pt_gp *tg_pt_gp, 2541 const char *page, 2542 size_t count) 2543 { 2544 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; 2545 unsigned long tmp; 2546 int new_state, ret; 2547 2548 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2549 pr_err("Unable to do implicit ALUA on non valid" 2550 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id); 2551 return -EINVAL; 2552 } 2553 if (!(dev->dev_flags & DF_CONFIGURED)) { 2554 pr_err("Unable to set alua_access_state while device is" 2555 " not configured\n"); 2556 return -ENODEV; 2557 } 2558 2559 ret = kstrtoul(page, 0, &tmp); 2560 if (ret < 0) { 2561 pr_err("Unable to extract new ALUA access state from" 2562 " %s\n", page); 2563 return ret; 2564 } 2565 new_state = (int)tmp; 2566 2567 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) { 2568 pr_err("Unable to process implicit configfs ALUA" 2569 " transition while TPGS_IMPLICIT_ALUA is disabled\n"); 2570 return -EINVAL; 2571 } 2572 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA && 2573 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) { 2574 /* LBA DEPENDENT is only allowed with implicit ALUA */ 2575 pr_err("Unable to process implicit configfs ALUA transition" 2576 " while explicit ALUA management is enabled\n"); 2577 return -EINVAL; 2578 } 2579 2580 ret = core_alua_do_port_transition(tg_pt_gp, dev, 2581 NULL, NULL, new_state, 0); 2582 return (!ret) ? count : -EINVAL; 2583 } 2584 2585 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR); 2586 2587 /* 2588 * alua_access_status 2589 */ 2590 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status( 2591 struct t10_alua_tg_pt_gp *tg_pt_gp, 2592 char *page) 2593 { 2594 return sprintf(page, "%s\n", 2595 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2596 } 2597 2598 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status( 2599 struct t10_alua_tg_pt_gp *tg_pt_gp, 2600 const char *page, 2601 size_t count) 2602 { 2603 unsigned long tmp; 2604 int new_status, ret; 2605 2606 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2607 pr_err("Unable to do set ALUA access status on non" 2608 " valid tg_pt_gp ID: %hu\n", 2609 tg_pt_gp->tg_pt_gp_valid_id); 2610 return -EINVAL; 2611 } 2612 2613 ret = kstrtoul(page, 0, &tmp); 2614 if (ret < 0) { 2615 pr_err("Unable to extract new ALUA access status" 2616 " from %s\n", page); 2617 return ret; 2618 } 2619 new_status = (int)tmp; 2620 2621 if ((new_status != ALUA_STATUS_NONE) && 2622 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && 2623 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { 2624 pr_err("Illegal ALUA access status: 0x%02x\n", 2625 new_status); 2626 return -EINVAL; 2627 } 2628 2629 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2630 return count; 2631 } 2632 2633 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR); 2634 2635 /* 2636 * alua_access_type 2637 */ 2638 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type( 2639 struct t10_alua_tg_pt_gp *tg_pt_gp, 2640 char *page) 2641 { 2642 return core_alua_show_access_type(tg_pt_gp, page); 2643 } 2644 2645 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type( 2646 struct t10_alua_tg_pt_gp *tg_pt_gp, 2647 const char *page, 2648 size_t count) 2649 { 2650 return core_alua_store_access_type(tg_pt_gp, page, count); 2651 } 2652 2653 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR); 2654 2655 /* 2656 * alua_supported_states 2657 */ 2658 2659 #define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit) \ 2660 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \ 2661 struct t10_alua_tg_pt_gp *t, char *p) \ 2662 { \ 2663 return sprintf(p, "%d\n", !!(t->_var & _bit)); \ 2664 } 2665 2666 #define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit) \ 2667 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\ 2668 struct t10_alua_tg_pt_gp *t, const char *p, size_t c) \ 2669 { \ 2670 unsigned long tmp; \ 2671 int ret; \ 2672 \ 2673 if (!t->tg_pt_gp_valid_id) { \ 2674 pr_err("Unable to do set ##_name ALUA state on non" \ 2675 " valid tg_pt_gp ID: %hu\n", \ 2676 t->tg_pt_gp_valid_id); \ 2677 return -EINVAL; \ 2678 } \ 2679 \ 2680 ret = kstrtoul(p, 0, &tmp); \ 2681 if (ret < 0) { \ 2682 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \ 2683 return -EINVAL; \ 2684 } \ 2685 if (tmp > 1) { \ 2686 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \ 2687 return -EINVAL; \ 2688 } \ 2689 if (tmp) \ 2690 t->_var |= _bit; \ 2691 else \ 2692 t->_var &= ~_bit; \ 2693 \ 2694 return c; \ 2695 } 2696 2697 SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning, 2698 tg_pt_gp_alua_supported_states, ALUA_T_SUP); 2699 SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning, 2700 tg_pt_gp_alua_supported_states, ALUA_T_SUP); 2701 SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR); 2702 2703 SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline, 2704 tg_pt_gp_alua_supported_states, ALUA_O_SUP); 2705 SE_DEV_ALUA_SUPPORT_STATE_STORE(offline, 2706 tg_pt_gp_alua_supported_states, ALUA_O_SUP); 2707 SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR); 2708 2709 SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent, 2710 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP); 2711 SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent, 2712 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP); 2713 SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO); 2714 2715 SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable, 2716 tg_pt_gp_alua_supported_states, ALUA_U_SUP); 2717 SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable, 2718 tg_pt_gp_alua_supported_states, ALUA_U_SUP); 2719 SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR); 2720 2721 SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby, 2722 tg_pt_gp_alua_supported_states, ALUA_S_SUP); 2723 SE_DEV_ALUA_SUPPORT_STATE_STORE(standby, 2724 tg_pt_gp_alua_supported_states, ALUA_S_SUP); 2725 SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR); 2726 2727 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized, 2728 tg_pt_gp_alua_supported_states, ALUA_AO_SUP); 2729 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized, 2730 tg_pt_gp_alua_supported_states, ALUA_AO_SUP); 2731 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR); 2732 2733 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized, 2734 tg_pt_gp_alua_supported_states, ALUA_AN_SUP); 2735 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized, 2736 tg_pt_gp_alua_supported_states, ALUA_AN_SUP); 2737 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR); 2738 2739 /* 2740 * alua_write_metadata 2741 */ 2742 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata( 2743 struct t10_alua_tg_pt_gp *tg_pt_gp, 2744 char *page) 2745 { 2746 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata); 2747 } 2748 2749 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata( 2750 struct t10_alua_tg_pt_gp *tg_pt_gp, 2751 const char *page, 2752 size_t count) 2753 { 2754 unsigned long tmp; 2755 int ret; 2756 2757 ret = kstrtoul(page, 0, &tmp); 2758 if (ret < 0) { 2759 pr_err("Unable to extract alua_write_metadata\n"); 2760 return ret; 2761 } 2762 2763 if ((tmp != 0) && (tmp != 1)) { 2764 pr_err("Illegal value for alua_write_metadata:" 2765 " %lu\n", tmp); 2766 return -EINVAL; 2767 } 2768 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 2769 2770 return count; 2771 } 2772 2773 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR); 2774 2775 2776 2777 /* 2778 * nonop_delay_msecs 2779 */ 2780 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs( 2781 struct t10_alua_tg_pt_gp *tg_pt_gp, 2782 char *page) 2783 { 2784 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page); 2785 2786 } 2787 2788 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs( 2789 struct t10_alua_tg_pt_gp *tg_pt_gp, 2790 const char *page, 2791 size_t count) 2792 { 2793 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count); 2794 } 2795 2796 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR); 2797 2798 /* 2799 * trans_delay_msecs 2800 */ 2801 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs( 2802 struct t10_alua_tg_pt_gp *tg_pt_gp, 2803 char *page) 2804 { 2805 return core_alua_show_trans_delay_msecs(tg_pt_gp, page); 2806 } 2807 2808 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs( 2809 struct t10_alua_tg_pt_gp *tg_pt_gp, 2810 const char *page, 2811 size_t count) 2812 { 2813 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count); 2814 } 2815 2816 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR); 2817 2818 /* 2819 * implicit_trans_secs 2820 */ 2821 static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs( 2822 struct t10_alua_tg_pt_gp *tg_pt_gp, 2823 char *page) 2824 { 2825 return core_alua_show_implicit_trans_secs(tg_pt_gp, page); 2826 } 2827 2828 static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs( 2829 struct t10_alua_tg_pt_gp *tg_pt_gp, 2830 const char *page, 2831 size_t count) 2832 { 2833 return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count); 2834 } 2835 2836 SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR); 2837 2838 /* 2839 * preferred 2840 */ 2841 2842 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred( 2843 struct t10_alua_tg_pt_gp *tg_pt_gp, 2844 char *page) 2845 { 2846 return core_alua_show_preferred_bit(tg_pt_gp, page); 2847 } 2848 2849 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred( 2850 struct t10_alua_tg_pt_gp *tg_pt_gp, 2851 const char *page, 2852 size_t count) 2853 { 2854 return core_alua_store_preferred_bit(tg_pt_gp, page, count); 2855 } 2856 2857 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR); 2858 2859 /* 2860 * tg_pt_gp_id 2861 */ 2862 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id( 2863 struct t10_alua_tg_pt_gp *tg_pt_gp, 2864 char *page) 2865 { 2866 if (!tg_pt_gp->tg_pt_gp_valid_id) 2867 return 0; 2868 2869 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 2870 } 2871 2872 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id( 2873 struct t10_alua_tg_pt_gp *tg_pt_gp, 2874 const char *page, 2875 size_t count) 2876 { 2877 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2878 unsigned long tg_pt_gp_id; 2879 int ret; 2880 2881 ret = kstrtoul(page, 0, &tg_pt_gp_id); 2882 if (ret < 0) { 2883 pr_err("kstrtoul() returned %d for" 2884 " tg_pt_gp_id\n", ret); 2885 return ret; 2886 } 2887 if (tg_pt_gp_id > 0x0000ffff) { 2888 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:" 2889 " 0x0000ffff\n", tg_pt_gp_id); 2890 return -EINVAL; 2891 } 2892 2893 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 2894 if (ret < 0) 2895 return -EINVAL; 2896 2897 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 2898 "core/alua/tg_pt_gps/%s to ID: %hu\n", 2899 config_item_name(&alua_tg_pt_gp_cg->cg_item), 2900 tg_pt_gp->tg_pt_gp_id); 2901 2902 return count; 2903 } 2904 2905 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR); 2906 2907 /* 2908 * members 2909 */ 2910 static ssize_t target_core_alua_tg_pt_gp_show_attr_members( 2911 struct t10_alua_tg_pt_gp *tg_pt_gp, 2912 char *page) 2913 { 2914 struct se_lun *lun; 2915 ssize_t len = 0, cur_len; 2916 unsigned char buf[TG_PT_GROUP_NAME_BUF]; 2917 2918 memset(buf, 0, TG_PT_GROUP_NAME_BUF); 2919 2920 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 2921 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, 2922 lun_tg_pt_gp_link) { 2923 struct se_portal_group *tpg = lun->lun_tpg; 2924 2925 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 2926 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(), 2927 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 2928 tpg->se_tpg_tfo->tpg_get_tag(tpg), 2929 config_item_name(&lun->lun_group.cg_item)); 2930 cur_len++; /* Extra byte for NULL terminator */ 2931 2932 if ((cur_len + len) > PAGE_SIZE) { 2933 pr_warn("Ran out of lu_gp_show_attr" 2934 "_members buffer\n"); 2935 break; 2936 } 2937 memcpy(page+len, buf, cur_len); 2938 len += cur_len; 2939 } 2940 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 2941 2942 return len; 2943 } 2944 2945 SE_DEV_ALUA_TG_PT_ATTR_RO(members); 2946 2947 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp, 2948 tg_pt_gp_group); 2949 2950 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 2951 &target_core_alua_tg_pt_gp_alua_access_state.attr, 2952 &target_core_alua_tg_pt_gp_alua_access_status.attr, 2953 &target_core_alua_tg_pt_gp_alua_access_type.attr, 2954 &target_core_alua_tg_pt_gp_alua_support_transitioning.attr, 2955 &target_core_alua_tg_pt_gp_alua_support_offline.attr, 2956 &target_core_alua_tg_pt_gp_alua_support_lba_dependent.attr, 2957 &target_core_alua_tg_pt_gp_alua_support_unavailable.attr, 2958 &target_core_alua_tg_pt_gp_alua_support_standby.attr, 2959 &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized.attr, 2960 &target_core_alua_tg_pt_gp_alua_support_active_optimized.attr, 2961 &target_core_alua_tg_pt_gp_alua_write_metadata.attr, 2962 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr, 2963 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr, 2964 &target_core_alua_tg_pt_gp_implicit_trans_secs.attr, 2965 &target_core_alua_tg_pt_gp_preferred.attr, 2966 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr, 2967 &target_core_alua_tg_pt_gp_members.attr, 2968 NULL, 2969 }; 2970 2971 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 2972 { 2973 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2974 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2975 2976 core_alua_free_tg_pt_gp(tg_pt_gp); 2977 } 2978 2979 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 2980 .release = target_core_alua_tg_pt_gp_release, 2981 .show_attribute = target_core_alua_tg_pt_gp_attr_show, 2982 .store_attribute = target_core_alua_tg_pt_gp_attr_store, 2983 }; 2984 2985 static struct config_item_type target_core_alua_tg_pt_gp_cit = { 2986 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 2987 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 2988 .ct_owner = THIS_MODULE, 2989 }; 2990 2991 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2992 2993 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 2994 2995 static struct config_group *target_core_alua_create_tg_pt_gp( 2996 struct config_group *group, 2997 const char *name) 2998 { 2999 struct t10_alua *alua = container_of(group, struct t10_alua, 3000 alua_tg_pt_gps_group); 3001 struct t10_alua_tg_pt_gp *tg_pt_gp; 3002 struct config_group *alua_tg_pt_gp_cg = NULL; 3003 struct config_item *alua_tg_pt_gp_ci = NULL; 3004 3005 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0); 3006 if (!tg_pt_gp) 3007 return NULL; 3008 3009 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 3010 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 3011 3012 config_group_init_type_name(alua_tg_pt_gp_cg, name, 3013 &target_core_alua_tg_pt_gp_cit); 3014 3015 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 3016 " Group: alua/tg_pt_gps/%s\n", 3017 config_item_name(alua_tg_pt_gp_ci)); 3018 3019 return alua_tg_pt_gp_cg; 3020 } 3021 3022 static void target_core_alua_drop_tg_pt_gp( 3023 struct config_group *group, 3024 struct config_item *item) 3025 { 3026 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3027 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3028 3029 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 3030 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 3031 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 3032 /* 3033 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 3034 * -> target_core_alua_tg_pt_gp_release(). 3035 */ 3036 config_item_put(item); 3037 } 3038 3039 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 3040 .make_group = &target_core_alua_create_tg_pt_gp, 3041 .drop_item = &target_core_alua_drop_tg_pt_gp, 3042 }; 3043 3044 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL); 3045 3046 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3047 3048 /* Start functions for struct config_item_type target_core_alua_cit */ 3049 3050 /* 3051 * target_core_alua_cit is a ConfigFS group that lives under 3052 * /sys/kernel/config/target/core/alua. There are default groups 3053 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 3054 * target_core_alua_cit in target_core_init_configfs() below. 3055 */ 3056 static struct config_item_type target_core_alua_cit = { 3057 .ct_item_ops = NULL, 3058 .ct_attrs = NULL, 3059 .ct_owner = THIS_MODULE, 3060 }; 3061 3062 /* End functions for struct config_item_type target_core_alua_cit */ 3063 3064 /* Start functions for struct config_item_type tb_dev_stat_cit */ 3065 3066 static struct config_group *target_core_stat_mkdir( 3067 struct config_group *group, 3068 const char *name) 3069 { 3070 return ERR_PTR(-ENOSYS); 3071 } 3072 3073 static void target_core_stat_rmdir( 3074 struct config_group *group, 3075 struct config_item *item) 3076 { 3077 return; 3078 } 3079 3080 static struct configfs_group_operations target_core_stat_group_ops = { 3081 .make_group = &target_core_stat_mkdir, 3082 .drop_item = &target_core_stat_rmdir, 3083 }; 3084 3085 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL); 3086 3087 /* End functions for struct config_item_type tb_dev_stat_cit */ 3088 3089 /* Start functions for struct config_item_type target_core_hba_cit */ 3090 3091 static struct config_group *target_core_make_subdev( 3092 struct config_group *group, 3093 const char *name) 3094 { 3095 struct t10_alua_tg_pt_gp *tg_pt_gp; 3096 struct config_item *hba_ci = &group->cg_item; 3097 struct se_hba *hba = item_to_hba(hba_ci); 3098 struct target_backend *tb = hba->backend; 3099 struct se_device *dev; 3100 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL; 3101 struct config_group *dev_stat_grp = NULL; 3102 int errno = -ENOMEM, ret; 3103 3104 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 3105 if (ret) 3106 return ERR_PTR(ret); 3107 3108 dev = target_alloc_device(hba, name); 3109 if (!dev) 3110 goto out_unlock; 3111 3112 dev_cg = &dev->dev_group; 3113 3114 dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6, 3115 GFP_KERNEL); 3116 if (!dev_cg->default_groups) 3117 goto out_free_device; 3118 3119 config_group_init_type_name(dev_cg, name, &tb->tb_dev_cit); 3120 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib", 3121 &tb->tb_dev_attrib_cit); 3122 config_group_init_type_name(&dev->dev_pr_group, "pr", 3123 &tb->tb_dev_pr_cit); 3124 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn", 3125 &tb->tb_dev_wwn_cit); 3126 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group, 3127 "alua", &tb->tb_dev_alua_tg_pt_gps_cit); 3128 config_group_init_type_name(&dev->dev_stat_grps.stat_group, 3129 "statistics", &tb->tb_dev_stat_cit); 3130 3131 dev_cg->default_groups[0] = &dev->dev_attrib.da_group; 3132 dev_cg->default_groups[1] = &dev->dev_pr_group; 3133 dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group; 3134 dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group; 3135 dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group; 3136 dev_cg->default_groups[5] = NULL; 3137 /* 3138 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 3139 */ 3140 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1); 3141 if (!tg_pt_gp) 3142 goto out_free_dev_cg_default_groups; 3143 dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 3144 3145 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group; 3146 tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 3147 GFP_KERNEL); 3148 if (!tg_pt_gp_cg->default_groups) { 3149 pr_err("Unable to allocate tg_pt_gp_cg->" 3150 "default_groups\n"); 3151 goto out_free_tg_pt_gp; 3152 } 3153 3154 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 3155 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 3156 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group; 3157 tg_pt_gp_cg->default_groups[1] = NULL; 3158 /* 3159 * Add core/$HBA/$DEV/statistics/ default groups 3160 */ 3161 dev_stat_grp = &dev->dev_stat_grps.stat_group; 3162 dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4, 3163 GFP_KERNEL); 3164 if (!dev_stat_grp->default_groups) { 3165 pr_err("Unable to allocate dev_stat_grp->default_groups\n"); 3166 goto out_free_tg_pt_gp_cg_default_groups; 3167 } 3168 target_stat_setup_dev_default_groups(dev); 3169 3170 mutex_unlock(&hba->hba_access_mutex); 3171 return dev_cg; 3172 3173 out_free_tg_pt_gp_cg_default_groups: 3174 kfree(tg_pt_gp_cg->default_groups); 3175 out_free_tg_pt_gp: 3176 core_alua_free_tg_pt_gp(tg_pt_gp); 3177 out_free_dev_cg_default_groups: 3178 kfree(dev_cg->default_groups); 3179 out_free_device: 3180 target_free_device(dev); 3181 out_unlock: 3182 mutex_unlock(&hba->hba_access_mutex); 3183 return ERR_PTR(errno); 3184 } 3185 3186 static void target_core_drop_subdev( 3187 struct config_group *group, 3188 struct config_item *item) 3189 { 3190 struct config_group *dev_cg = to_config_group(item); 3191 struct se_device *dev = 3192 container_of(dev_cg, struct se_device, dev_group); 3193 struct se_hba *hba; 3194 struct config_item *df_item; 3195 struct config_group *tg_pt_gp_cg, *dev_stat_grp; 3196 int i; 3197 3198 hba = item_to_hba(&dev->se_hba->hba_group.cg_item); 3199 3200 mutex_lock(&hba->hba_access_mutex); 3201 3202 dev_stat_grp = &dev->dev_stat_grps.stat_group; 3203 for (i = 0; dev_stat_grp->default_groups[i]; i++) { 3204 df_item = &dev_stat_grp->default_groups[i]->cg_item; 3205 dev_stat_grp->default_groups[i] = NULL; 3206 config_item_put(df_item); 3207 } 3208 kfree(dev_stat_grp->default_groups); 3209 3210 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group; 3211 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) { 3212 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item; 3213 tg_pt_gp_cg->default_groups[i] = NULL; 3214 config_item_put(df_item); 3215 } 3216 kfree(tg_pt_gp_cg->default_groups); 3217 /* 3218 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 3219 * directly from target_core_alua_tg_pt_gp_release(). 3220 */ 3221 dev->t10_alua.default_tg_pt_gp = NULL; 3222 3223 for (i = 0; dev_cg->default_groups[i]; i++) { 3224 df_item = &dev_cg->default_groups[i]->cg_item; 3225 dev_cg->default_groups[i] = NULL; 3226 config_item_put(df_item); 3227 } 3228 /* 3229 * se_dev is released from target_core_dev_item_ops->release() 3230 */ 3231 config_item_put(item); 3232 mutex_unlock(&hba->hba_access_mutex); 3233 } 3234 3235 static struct configfs_group_operations target_core_hba_group_ops = { 3236 .make_group = target_core_make_subdev, 3237 .drop_item = target_core_drop_subdev, 3238 }; 3239 3240 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba); 3241 #define SE_HBA_ATTR(_name, _mode) \ 3242 static struct target_core_hba_attribute \ 3243 target_core_hba_##_name = \ 3244 __CONFIGFS_EATTR(_name, _mode, \ 3245 target_core_hba_show_attr_##_name, \ 3246 target_core_hba_store_attr_##_name); 3247 3248 #define SE_HBA_ATTR_RO(_name) \ 3249 static struct target_core_hba_attribute \ 3250 target_core_hba_##_name = \ 3251 __CONFIGFS_EATTR_RO(_name, \ 3252 target_core_hba_show_attr_##_name); 3253 3254 static ssize_t target_core_hba_show_attr_hba_info( 3255 struct se_hba *hba, 3256 char *page) 3257 { 3258 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 3259 hba->hba_id, hba->backend->ops->name, 3260 TARGET_CORE_VERSION); 3261 } 3262 3263 SE_HBA_ATTR_RO(hba_info); 3264 3265 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba, 3266 char *page) 3267 { 3268 int hba_mode = 0; 3269 3270 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 3271 hba_mode = 1; 3272 3273 return sprintf(page, "%d\n", hba_mode); 3274 } 3275 3276 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba, 3277 const char *page, size_t count) 3278 { 3279 unsigned long mode_flag; 3280 int ret; 3281 3282 if (hba->backend->ops->pmode_enable_hba == NULL) 3283 return -EINVAL; 3284 3285 ret = kstrtoul(page, 0, &mode_flag); 3286 if (ret < 0) { 3287 pr_err("Unable to extract hba mode flag: %d\n", ret); 3288 return ret; 3289 } 3290 3291 if (hba->dev_count) { 3292 pr_err("Unable to set hba_mode with active devices\n"); 3293 return -EINVAL; 3294 } 3295 3296 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag); 3297 if (ret < 0) 3298 return -EINVAL; 3299 if (ret > 0) 3300 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 3301 else if (ret == 0) 3302 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 3303 3304 return count; 3305 } 3306 3307 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR); 3308 3309 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group); 3310 3311 static void target_core_hba_release(struct config_item *item) 3312 { 3313 struct se_hba *hba = container_of(to_config_group(item), 3314 struct se_hba, hba_group); 3315 core_delete_hba(hba); 3316 } 3317 3318 static struct configfs_attribute *target_core_hba_attrs[] = { 3319 &target_core_hba_hba_info.attr, 3320 &target_core_hba_hba_mode.attr, 3321 NULL, 3322 }; 3323 3324 static struct configfs_item_operations target_core_hba_item_ops = { 3325 .release = target_core_hba_release, 3326 .show_attribute = target_core_hba_attr_show, 3327 .store_attribute = target_core_hba_attr_store, 3328 }; 3329 3330 static struct config_item_type target_core_hba_cit = { 3331 .ct_item_ops = &target_core_hba_item_ops, 3332 .ct_group_ops = &target_core_hba_group_ops, 3333 .ct_attrs = target_core_hba_attrs, 3334 .ct_owner = THIS_MODULE, 3335 }; 3336 3337 static struct config_group *target_core_call_addhbatotarget( 3338 struct config_group *group, 3339 const char *name) 3340 { 3341 char *se_plugin_str, *str, *str2; 3342 struct se_hba *hba; 3343 char buf[TARGET_CORE_NAME_MAX_LEN]; 3344 unsigned long plugin_dep_id = 0; 3345 int ret; 3346 3347 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN); 3348 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 3349 pr_err("Passed *name strlen(): %d exceeds" 3350 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 3351 TARGET_CORE_NAME_MAX_LEN); 3352 return ERR_PTR(-ENAMETOOLONG); 3353 } 3354 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 3355 3356 str = strstr(buf, "_"); 3357 if (!str) { 3358 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 3359 return ERR_PTR(-EINVAL); 3360 } 3361 se_plugin_str = buf; 3362 /* 3363 * Special case for subsystem plugins that have "_" in their names. 3364 * Namely rd_direct and rd_mcp.. 3365 */ 3366 str2 = strstr(str+1, "_"); 3367 if (str2) { 3368 *str2 = '\0'; /* Terminate for *se_plugin_str */ 3369 str2++; /* Skip to start of plugin dependent ID */ 3370 str = str2; 3371 } else { 3372 *str = '\0'; /* Terminate for *se_plugin_str */ 3373 str++; /* Skip to start of plugin dependent ID */ 3374 } 3375 3376 ret = kstrtoul(str, 0, &plugin_dep_id); 3377 if (ret < 0) { 3378 pr_err("kstrtoul() returned %d for" 3379 " plugin_dep_id\n", ret); 3380 return ERR_PTR(ret); 3381 } 3382 /* 3383 * Load up TCM subsystem plugins if they have not already been loaded. 3384 */ 3385 transport_subsystem_check_init(); 3386 3387 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 3388 if (IS_ERR(hba)) 3389 return ERR_CAST(hba); 3390 3391 config_group_init_type_name(&hba->hba_group, name, 3392 &target_core_hba_cit); 3393 3394 return &hba->hba_group; 3395 } 3396 3397 static void target_core_call_delhbafromtarget( 3398 struct config_group *group, 3399 struct config_item *item) 3400 { 3401 /* 3402 * core_delete_hba() is called from target_core_hba_item_ops->release() 3403 * -> target_core_hba_release() 3404 */ 3405 config_item_put(item); 3406 } 3407 3408 static struct configfs_group_operations target_core_group_ops = { 3409 .make_group = target_core_call_addhbatotarget, 3410 .drop_item = target_core_call_delhbafromtarget, 3411 }; 3412 3413 static struct config_item_type target_core_cit = { 3414 .ct_item_ops = NULL, 3415 .ct_group_ops = &target_core_group_ops, 3416 .ct_attrs = NULL, 3417 .ct_owner = THIS_MODULE, 3418 }; 3419 3420 /* Stop functions for struct config_item_type target_core_hba_cit */ 3421 3422 void target_setup_backend_cits(struct target_backend *tb) 3423 { 3424 target_core_setup_dev_cit(tb); 3425 target_core_setup_dev_attrib_cit(tb); 3426 target_core_setup_dev_pr_cit(tb); 3427 target_core_setup_dev_wwn_cit(tb); 3428 target_core_setup_dev_alua_tg_pt_gps_cit(tb); 3429 target_core_setup_dev_stat_cit(tb); 3430 } 3431 3432 static int __init target_core_init_configfs(void) 3433 { 3434 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL; 3435 struct config_group *lu_gp_cg = NULL; 3436 struct configfs_subsystem *subsys = &target_core_fabrics; 3437 struct t10_alua_lu_gp *lu_gp; 3438 int ret; 3439 3440 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 3441 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3442 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3443 3444 config_group_init(&subsys->su_group); 3445 mutex_init(&subsys->su_mutex); 3446 3447 ret = init_se_kmem_caches(); 3448 if (ret < 0) 3449 return ret; 3450 /* 3451 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3452 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3453 */ 3454 target_cg = &subsys->su_group; 3455 target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 3456 GFP_KERNEL); 3457 if (!target_cg->default_groups) { 3458 pr_err("Unable to allocate target_cg->default_groups\n"); 3459 ret = -ENOMEM; 3460 goto out_global; 3461 } 3462 3463 config_group_init_type_name(&target_core_hbagroup, 3464 "core", &target_core_cit); 3465 target_cg->default_groups[0] = &target_core_hbagroup; 3466 target_cg->default_groups[1] = NULL; 3467 /* 3468 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3469 */ 3470 hba_cg = &target_core_hbagroup; 3471 hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 3472 GFP_KERNEL); 3473 if (!hba_cg->default_groups) { 3474 pr_err("Unable to allocate hba_cg->default_groups\n"); 3475 ret = -ENOMEM; 3476 goto out_global; 3477 } 3478 config_group_init_type_name(&alua_group, 3479 "alua", &target_core_alua_cit); 3480 hba_cg->default_groups[0] = &alua_group; 3481 hba_cg->default_groups[1] = NULL; 3482 /* 3483 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3484 * groups under /sys/kernel/config/target/core/alua/ 3485 */ 3486 alua_cg = &alua_group; 3487 alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 3488 GFP_KERNEL); 3489 if (!alua_cg->default_groups) { 3490 pr_err("Unable to allocate alua_cg->default_groups\n"); 3491 ret = -ENOMEM; 3492 goto out_global; 3493 } 3494 3495 config_group_init_type_name(&alua_lu_gps_group, 3496 "lu_gps", &target_core_alua_lu_gps_cit); 3497 alua_cg->default_groups[0] = &alua_lu_gps_group; 3498 alua_cg->default_groups[1] = NULL; 3499 /* 3500 * Add core/alua/lu_gps/default_lu_gp 3501 */ 3502 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3503 if (IS_ERR(lu_gp)) { 3504 ret = -ENOMEM; 3505 goto out_global; 3506 } 3507 3508 lu_gp_cg = &alua_lu_gps_group; 3509 lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 3510 GFP_KERNEL); 3511 if (!lu_gp_cg->default_groups) { 3512 pr_err("Unable to allocate lu_gp_cg->default_groups\n"); 3513 ret = -ENOMEM; 3514 goto out_global; 3515 } 3516 3517 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3518 &target_core_alua_lu_gp_cit); 3519 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group; 3520 lu_gp_cg->default_groups[1] = NULL; 3521 default_lu_gp = lu_gp; 3522 /* 3523 * Register the target_core_mod subsystem with configfs. 3524 */ 3525 ret = configfs_register_subsystem(subsys); 3526 if (ret < 0) { 3527 pr_err("Error %d while registering subsystem %s\n", 3528 ret, subsys->su_group.cg_item.ci_namebuf); 3529 goto out_global; 3530 } 3531 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 3532 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s" 3533 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3534 /* 3535 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3536 */ 3537 ret = rd_module_init(); 3538 if (ret < 0) 3539 goto out; 3540 3541 ret = core_dev_setup_virtual_lun0(); 3542 if (ret < 0) 3543 goto out; 3544 3545 ret = target_xcopy_setup_pt(); 3546 if (ret < 0) 3547 goto out; 3548 3549 return 0; 3550 3551 out: 3552 configfs_unregister_subsystem(subsys); 3553 core_dev_release_virtual_lun0(); 3554 rd_module_exit(); 3555 out_global: 3556 if (default_lu_gp) { 3557 core_alua_free_lu_gp(default_lu_gp); 3558 default_lu_gp = NULL; 3559 } 3560 if (lu_gp_cg) 3561 kfree(lu_gp_cg->default_groups); 3562 if (alua_cg) 3563 kfree(alua_cg->default_groups); 3564 if (hba_cg) 3565 kfree(hba_cg->default_groups); 3566 kfree(target_cg->default_groups); 3567 release_se_kmem_caches(); 3568 return ret; 3569 } 3570 3571 static void __exit target_core_exit_configfs(void) 3572 { 3573 struct config_group *hba_cg, *alua_cg, *lu_gp_cg; 3574 struct config_item *item; 3575 int i; 3576 3577 lu_gp_cg = &alua_lu_gps_group; 3578 for (i = 0; lu_gp_cg->default_groups[i]; i++) { 3579 item = &lu_gp_cg->default_groups[i]->cg_item; 3580 lu_gp_cg->default_groups[i] = NULL; 3581 config_item_put(item); 3582 } 3583 kfree(lu_gp_cg->default_groups); 3584 lu_gp_cg->default_groups = NULL; 3585 3586 alua_cg = &alua_group; 3587 for (i = 0; alua_cg->default_groups[i]; i++) { 3588 item = &alua_cg->default_groups[i]->cg_item; 3589 alua_cg->default_groups[i] = NULL; 3590 config_item_put(item); 3591 } 3592 kfree(alua_cg->default_groups); 3593 alua_cg->default_groups = NULL; 3594 3595 hba_cg = &target_core_hbagroup; 3596 for (i = 0; hba_cg->default_groups[i]; i++) { 3597 item = &hba_cg->default_groups[i]->cg_item; 3598 hba_cg->default_groups[i] = NULL; 3599 config_item_put(item); 3600 } 3601 kfree(hba_cg->default_groups); 3602 hba_cg->default_groups = NULL; 3603 /* 3604 * We expect subsys->su_group.default_groups to be released 3605 * by configfs subsystem provider logic.. 3606 */ 3607 configfs_unregister_subsystem(&target_core_fabrics); 3608 kfree(target_core_fabrics.su_group.default_groups); 3609 3610 core_alua_free_lu_gp(default_lu_gp); 3611 default_lu_gp = NULL; 3612 3613 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3614 " Infrastructure\n"); 3615 3616 core_dev_release_virtual_lun0(); 3617 rd_module_exit(); 3618 target_xcopy_release_pt(); 3619 release_se_kmem_caches(); 3620 } 3621 3622 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3623 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3624 MODULE_LICENSE("GPL"); 3625 3626 module_init(target_core_init_configfs); 3627 module_exit(target_core_exit_configfs); 3628