1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /******************************************************************************* 3 * Filename: target_core_configfs.c 4 * 5 * This file contains ConfigFS logic for the Generic Target Engine project. 6 * 7 * (c) Copyright 2008-2013 Datera, Inc. 8 * 9 * Nicholas A. Bellinger <nab@kernel.org> 10 * 11 * based on configfs Copyright (C) 2005 Oracle. All rights reserved. 12 * 13 ****************************************************************************/ 14 15 #include <linux/module.h> 16 #include <linux/moduleparam.h> 17 #include <generated/utsrelease.h> 18 #include <linux/utsname.h> 19 #include <linux/init.h> 20 #include <linux/fs.h> 21 #include <linux/namei.h> 22 #include <linux/slab.h> 23 #include <linux/types.h> 24 #include <linux/delay.h> 25 #include <linux/unistd.h> 26 #include <linux/string.h> 27 #include <linux/parser.h> 28 #include <linux/syscalls.h> 29 #include <linux/configfs.h> 30 #include <linux/spinlock.h> 31 32 #include <target/target_core_base.h> 33 #include <target/target_core_backend.h> 34 #include <target/target_core_fabric.h> 35 36 #include "target_core_internal.h" 37 #include "target_core_alua.h" 38 #include "target_core_pr.h" 39 #include "target_core_rd.h" 40 #include "target_core_xcopy.h" 41 42 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \ 43 static void target_core_setup_##_name##_cit(struct target_backend *tb) \ 44 { \ 45 struct config_item_type *cit = &tb->tb_##_name##_cit; \ 46 \ 47 cit->ct_item_ops = _item_ops; \ 48 cit->ct_group_ops = _group_ops; \ 49 cit->ct_attrs = _attrs; \ 50 cit->ct_owner = tb->ops->owner; \ 51 pr_debug("Setup generic %s\n", __stringify(_name)); \ 52 } 53 54 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \ 55 static void target_core_setup_##_name##_cit(struct target_backend *tb) \ 56 { \ 57 struct config_item_type *cit = &tb->tb_##_name##_cit; \ 58 \ 59 cit->ct_item_ops = _item_ops; \ 60 cit->ct_group_ops = _group_ops; \ 61 cit->ct_attrs = tb->ops->tb_##_name##_attrs; \ 62 cit->ct_owner = tb->ops->owner; \ 63 pr_debug("Setup generic %s\n", __stringify(_name)); \ 64 } 65 66 extern struct t10_alua_lu_gp *default_lu_gp; 67 68 static LIST_HEAD(g_tf_list); 69 static DEFINE_MUTEX(g_tf_lock); 70 71 static struct config_group target_core_hbagroup; 72 static struct config_group alua_group; 73 static struct config_group alua_lu_gps_group; 74 75 static unsigned int target_devices; 76 static DEFINE_MUTEX(target_devices_lock); 77 78 static inline struct se_hba * 79 item_to_hba(struct config_item *item) 80 { 81 return container_of(to_config_group(item), struct se_hba, hba_group); 82 } 83 84 /* 85 * Attributes for /sys/kernel/config/target/ 86 */ 87 static ssize_t target_core_item_version_show(struct config_item *item, 88 char *page) 89 { 90 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s" 91 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION, 92 utsname()->sysname, utsname()->machine); 93 } 94 95 CONFIGFS_ATTR_RO(target_core_item_, version); 96 97 char db_root[DB_ROOT_LEN] = DB_ROOT_DEFAULT; 98 static char db_root_stage[DB_ROOT_LEN]; 99 100 static ssize_t target_core_item_dbroot_show(struct config_item *item, 101 char *page) 102 { 103 return sprintf(page, "%s\n", db_root); 104 } 105 106 static ssize_t target_core_item_dbroot_store(struct config_item *item, 107 const char *page, size_t count) 108 { 109 ssize_t read_bytes; 110 struct file *fp; 111 ssize_t r = -EINVAL; 112 113 mutex_lock(&target_devices_lock); 114 if (target_devices) { 115 pr_err("db_root: cannot be changed because it's in use\n"); 116 goto unlock; 117 } 118 119 if (count > (DB_ROOT_LEN - 1)) { 120 pr_err("db_root: count %d exceeds DB_ROOT_LEN-1: %u\n", 121 (int)count, DB_ROOT_LEN - 1); 122 goto unlock; 123 } 124 125 read_bytes = snprintf(db_root_stage, DB_ROOT_LEN, "%s", page); 126 if (!read_bytes) 127 goto unlock; 128 129 if (db_root_stage[read_bytes - 1] == '\n') 130 db_root_stage[read_bytes - 1] = '\0'; 131 132 /* validate new db root before accepting it */ 133 fp = filp_open(db_root_stage, O_RDONLY, 0); 134 if (IS_ERR(fp)) { 135 pr_err("db_root: cannot open: %s\n", db_root_stage); 136 goto unlock; 137 } 138 if (!S_ISDIR(file_inode(fp)->i_mode)) { 139 filp_close(fp, NULL); 140 pr_err("db_root: not a directory: %s\n", db_root_stage); 141 goto unlock; 142 } 143 filp_close(fp, NULL); 144 145 strncpy(db_root, db_root_stage, read_bytes); 146 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); 147 148 r = read_bytes; 149 150 unlock: 151 mutex_unlock(&target_devices_lock); 152 return r; 153 } 154 155 CONFIGFS_ATTR(target_core_item_, dbroot); 156 157 static struct target_fabric_configfs *target_core_get_fabric( 158 const char *name) 159 { 160 struct target_fabric_configfs *tf; 161 162 if (!name) 163 return NULL; 164 165 mutex_lock(&g_tf_lock); 166 list_for_each_entry(tf, &g_tf_list, tf_list) { 167 const char *cmp_name = tf->tf_ops->fabric_alias; 168 if (!cmp_name) 169 cmp_name = tf->tf_ops->fabric_name; 170 if (!strcmp(cmp_name, name)) { 171 atomic_inc(&tf->tf_access_cnt); 172 mutex_unlock(&g_tf_lock); 173 return tf; 174 } 175 } 176 mutex_unlock(&g_tf_lock); 177 178 return NULL; 179 } 180 181 /* 182 * Called from struct target_core_group_ops->make_group() 183 */ 184 static struct config_group *target_core_register_fabric( 185 struct config_group *group, 186 const char *name) 187 { 188 struct target_fabric_configfs *tf; 189 int ret; 190 191 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:" 192 " %s\n", group, name); 193 194 tf = target_core_get_fabric(name); 195 if (!tf) { 196 pr_debug("target_core_register_fabric() trying autoload for %s\n", 197 name); 198 199 /* 200 * Below are some hardcoded request_module() calls to automatically 201 * local fabric modules when the following is called: 202 * 203 * mkdir -p /sys/kernel/config/target/$MODULE_NAME 204 * 205 * Note that this does not limit which TCM fabric module can be 206 * registered, but simply provids auto loading logic for modules with 207 * mkdir(2) system calls with known TCM fabric modules. 208 */ 209 210 if (!strncmp(name, "iscsi", 5)) { 211 /* 212 * Automatically load the LIO Target fabric module when the 213 * following is called: 214 * 215 * mkdir -p $CONFIGFS/target/iscsi 216 */ 217 ret = request_module("iscsi_target_mod"); 218 if (ret < 0) { 219 pr_debug("request_module() failed for" 220 " iscsi_target_mod.ko: %d\n", ret); 221 return ERR_PTR(-EINVAL); 222 } 223 } else if (!strncmp(name, "loopback", 8)) { 224 /* 225 * Automatically load the tcm_loop fabric module when the 226 * following is called: 227 * 228 * mkdir -p $CONFIGFS/target/loopback 229 */ 230 ret = request_module("tcm_loop"); 231 if (ret < 0) { 232 pr_debug("request_module() failed for" 233 " tcm_loop.ko: %d\n", ret); 234 return ERR_PTR(-EINVAL); 235 } 236 } 237 238 tf = target_core_get_fabric(name); 239 } 240 241 if (!tf) { 242 pr_debug("target_core_get_fabric() failed for %s\n", 243 name); 244 return ERR_PTR(-EINVAL); 245 } 246 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:" 247 " %s\n", tf->tf_ops->fabric_name); 248 /* 249 * On a successful target_core_get_fabric() look, the returned 250 * struct target_fabric_configfs *tf will contain a usage reference. 251 */ 252 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n", 253 &tf->tf_wwn_cit); 254 255 config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit); 256 257 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth", 258 &tf->tf_discovery_cit); 259 configfs_add_default_group(&tf->tf_disc_group, &tf->tf_group); 260 261 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric: %s\n", 262 config_item_name(&tf->tf_group.cg_item)); 263 return &tf->tf_group; 264 } 265 266 /* 267 * Called from struct target_core_group_ops->drop_item() 268 */ 269 static void target_core_deregister_fabric( 270 struct config_group *group, 271 struct config_item *item) 272 { 273 struct target_fabric_configfs *tf = container_of( 274 to_config_group(item), struct target_fabric_configfs, tf_group); 275 276 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in" 277 " tf list\n", config_item_name(item)); 278 279 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:" 280 " %s\n", tf->tf_ops->fabric_name); 281 atomic_dec(&tf->tf_access_cnt); 282 283 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci" 284 " %s\n", config_item_name(item)); 285 286 configfs_remove_default_groups(&tf->tf_group); 287 config_item_put(item); 288 } 289 290 static struct configfs_group_operations target_core_fabric_group_ops = { 291 .make_group = &target_core_register_fabric, 292 .drop_item = &target_core_deregister_fabric, 293 }; 294 295 /* 296 * All item attributes appearing in /sys/kernel/target/ appear here. 297 */ 298 static struct configfs_attribute *target_core_fabric_item_attrs[] = { 299 &target_core_item_attr_version, 300 &target_core_item_attr_dbroot, 301 NULL, 302 }; 303 304 /* 305 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/ 306 */ 307 static const struct config_item_type target_core_fabrics_item = { 308 .ct_group_ops = &target_core_fabric_group_ops, 309 .ct_attrs = target_core_fabric_item_attrs, 310 .ct_owner = THIS_MODULE, 311 }; 312 313 static struct configfs_subsystem target_core_fabrics = { 314 .su_group = { 315 .cg_item = { 316 .ci_namebuf = "target", 317 .ci_type = &target_core_fabrics_item, 318 }, 319 }, 320 }; 321 322 int target_depend_item(struct config_item *item) 323 { 324 return configfs_depend_item(&target_core_fabrics, item); 325 } 326 EXPORT_SYMBOL(target_depend_item); 327 328 void target_undepend_item(struct config_item *item) 329 { 330 return configfs_undepend_item(item); 331 } 332 EXPORT_SYMBOL(target_undepend_item); 333 334 /*############################################################################## 335 // Start functions called by external Target Fabrics Modules 336 //############################################################################*/ 337 338 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo) 339 { 340 if (tfo->fabric_alias) { 341 if (strlen(tfo->fabric_alias) >= TARGET_FABRIC_NAME_SIZE) { 342 pr_err("Passed alias: %s exceeds " 343 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_alias); 344 return -EINVAL; 345 } 346 } 347 if (!tfo->fabric_name) { 348 pr_err("Missing tfo->fabric_name\n"); 349 return -EINVAL; 350 } 351 if (strlen(tfo->fabric_name) >= TARGET_FABRIC_NAME_SIZE) { 352 pr_err("Passed name: %s exceeds " 353 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_name); 354 return -EINVAL; 355 } 356 if (!tfo->tpg_get_wwn) { 357 pr_err("Missing tfo->tpg_get_wwn()\n"); 358 return -EINVAL; 359 } 360 if (!tfo->tpg_get_tag) { 361 pr_err("Missing tfo->tpg_get_tag()\n"); 362 return -EINVAL; 363 } 364 if (!tfo->tpg_check_demo_mode) { 365 pr_err("Missing tfo->tpg_check_demo_mode()\n"); 366 return -EINVAL; 367 } 368 if (!tfo->tpg_check_demo_mode_cache) { 369 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n"); 370 return -EINVAL; 371 } 372 if (!tfo->tpg_check_demo_mode_write_protect) { 373 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n"); 374 return -EINVAL; 375 } 376 if (!tfo->tpg_check_prod_mode_write_protect) { 377 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n"); 378 return -EINVAL; 379 } 380 if (!tfo->tpg_get_inst_index) { 381 pr_err("Missing tfo->tpg_get_inst_index()\n"); 382 return -EINVAL; 383 } 384 if (!tfo->release_cmd) { 385 pr_err("Missing tfo->release_cmd()\n"); 386 return -EINVAL; 387 } 388 if (!tfo->sess_get_index) { 389 pr_err("Missing tfo->sess_get_index()\n"); 390 return -EINVAL; 391 } 392 if (!tfo->write_pending) { 393 pr_err("Missing tfo->write_pending()\n"); 394 return -EINVAL; 395 } 396 if (!tfo->set_default_node_attributes) { 397 pr_err("Missing tfo->set_default_node_attributes()\n"); 398 return -EINVAL; 399 } 400 if (!tfo->get_cmd_state) { 401 pr_err("Missing tfo->get_cmd_state()\n"); 402 return -EINVAL; 403 } 404 if (!tfo->queue_data_in) { 405 pr_err("Missing tfo->queue_data_in()\n"); 406 return -EINVAL; 407 } 408 if (!tfo->queue_status) { 409 pr_err("Missing tfo->queue_status()\n"); 410 return -EINVAL; 411 } 412 if (!tfo->queue_tm_rsp) { 413 pr_err("Missing tfo->queue_tm_rsp()\n"); 414 return -EINVAL; 415 } 416 if (!tfo->aborted_task) { 417 pr_err("Missing tfo->aborted_task()\n"); 418 return -EINVAL; 419 } 420 if (!tfo->check_stop_free) { 421 pr_err("Missing tfo->check_stop_free()\n"); 422 return -EINVAL; 423 } 424 /* 425 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn() 426 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in 427 * target_core_fabric_configfs.c WWN+TPG group context code. 428 */ 429 if (!tfo->fabric_make_wwn) { 430 pr_err("Missing tfo->fabric_make_wwn()\n"); 431 return -EINVAL; 432 } 433 if (!tfo->fabric_drop_wwn) { 434 pr_err("Missing tfo->fabric_drop_wwn()\n"); 435 return -EINVAL; 436 } 437 if (!tfo->fabric_make_tpg) { 438 pr_err("Missing tfo->fabric_make_tpg()\n"); 439 return -EINVAL; 440 } 441 if (!tfo->fabric_drop_tpg) { 442 pr_err("Missing tfo->fabric_drop_tpg()\n"); 443 return -EINVAL; 444 } 445 446 return 0; 447 } 448 449 int target_register_template(const struct target_core_fabric_ops *fo) 450 { 451 struct target_fabric_configfs *tf; 452 int ret; 453 454 ret = target_fabric_tf_ops_check(fo); 455 if (ret) 456 return ret; 457 458 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL); 459 if (!tf) { 460 pr_err("%s: could not allocate memory!\n", __func__); 461 return -ENOMEM; 462 } 463 464 INIT_LIST_HEAD(&tf->tf_list); 465 atomic_set(&tf->tf_access_cnt, 0); 466 tf->tf_ops = fo; 467 target_fabric_setup_cits(tf); 468 469 mutex_lock(&g_tf_lock); 470 list_add_tail(&tf->tf_list, &g_tf_list); 471 mutex_unlock(&g_tf_lock); 472 473 return 0; 474 } 475 EXPORT_SYMBOL(target_register_template); 476 477 void target_unregister_template(const struct target_core_fabric_ops *fo) 478 { 479 struct target_fabric_configfs *t; 480 481 mutex_lock(&g_tf_lock); 482 list_for_each_entry(t, &g_tf_list, tf_list) { 483 if (!strcmp(t->tf_ops->fabric_name, fo->fabric_name)) { 484 BUG_ON(atomic_read(&t->tf_access_cnt)); 485 list_del(&t->tf_list); 486 mutex_unlock(&g_tf_lock); 487 /* 488 * Wait for any outstanding fabric se_deve_entry->rcu_head 489 * callbacks to complete post kfree_rcu(), before allowing 490 * fabric driver unload of TFO->module to proceed. 491 */ 492 rcu_barrier(); 493 kfree(t->tf_tpg_base_cit.ct_attrs); 494 kfree(t); 495 return; 496 } 497 } 498 mutex_unlock(&g_tf_lock); 499 } 500 EXPORT_SYMBOL(target_unregister_template); 501 502 /*############################################################################## 503 // Stop functions called by external Target Fabrics Modules 504 //############################################################################*/ 505 506 static inline struct se_dev_attrib *to_attrib(struct config_item *item) 507 { 508 return container_of(to_config_group(item), struct se_dev_attrib, 509 da_group); 510 } 511 512 /* Start functions for struct config_item_type tb_dev_attrib_cit */ 513 #define DEF_CONFIGFS_ATTRIB_SHOW(_name) \ 514 static ssize_t _name##_show(struct config_item *item, char *page) \ 515 { \ 516 return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \ 517 } 518 519 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias); 520 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo); 521 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write); 522 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read); 523 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache); 524 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl); 525 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas); 526 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu); 527 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws); 528 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw); 529 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc); 530 DEF_CONFIGFS_ATTRIB_SHOW(emulate_pr); 531 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type); 532 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type); 533 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify); 534 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids); 535 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot); 536 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord); 537 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl); 538 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size); 539 DEF_CONFIGFS_ATTRIB_SHOW(block_size); 540 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors); 541 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors); 542 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth); 543 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth); 544 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count); 545 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count); 546 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity); 547 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment); 548 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data); 549 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len); 550 551 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \ 552 static ssize_t _name##_store(struct config_item *item, const char *page,\ 553 size_t count) \ 554 { \ 555 struct se_dev_attrib *da = to_attrib(item); \ 556 u32 val; \ 557 int ret; \ 558 \ 559 ret = kstrtou32(page, 0, &val); \ 560 if (ret < 0) \ 561 return ret; \ 562 da->_name = val; \ 563 return count; \ 564 } 565 566 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count); 567 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count); 568 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity); 569 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment); 570 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len); 571 572 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \ 573 static ssize_t _name##_store(struct config_item *item, const char *page, \ 574 size_t count) \ 575 { \ 576 struct se_dev_attrib *da = to_attrib(item); \ 577 bool flag; \ 578 int ret; \ 579 \ 580 ret = strtobool(page, &flag); \ 581 if (ret < 0) \ 582 return ret; \ 583 da->_name = flag; \ 584 return count; \ 585 } 586 587 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write); 588 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw); 589 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc); 590 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr); 591 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids); 592 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot); 593 594 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \ 595 static ssize_t _name##_store(struct config_item *item, const char *page,\ 596 size_t count) \ 597 { \ 598 printk_once(KERN_WARNING \ 599 "ignoring deprecated %s attribute\n", \ 600 __stringify(_name)); \ 601 return count; \ 602 } 603 604 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo); 605 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read); 606 607 static void dev_set_t10_wwn_model_alias(struct se_device *dev) 608 { 609 const char *configname; 610 611 configname = config_item_name(&dev->dev_group.cg_item); 612 if (strlen(configname) >= INQUIRY_MODEL_LEN) { 613 pr_warn("dev[%p]: Backstore name '%s' is too long for " 614 "INQUIRY_MODEL, truncating to 15 characters\n", dev, 615 configname); 616 } 617 /* 618 * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1) 619 * here without potentially breaking existing setups, so continue to 620 * truncate one byte shorter than what can be carried in INQUIRY. 621 */ 622 strlcpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN); 623 } 624 625 static ssize_t emulate_model_alias_store(struct config_item *item, 626 const char *page, size_t count) 627 { 628 struct se_dev_attrib *da = to_attrib(item); 629 struct se_device *dev = da->da_dev; 630 bool flag; 631 int ret; 632 633 if (dev->export_count) { 634 pr_err("dev[%p]: Unable to change model alias" 635 " while export_count is %d\n", 636 dev, dev->export_count); 637 return -EINVAL; 638 } 639 640 ret = strtobool(page, &flag); 641 if (ret < 0) 642 return ret; 643 644 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); 645 if (flag) { 646 dev_set_t10_wwn_model_alias(dev); 647 } else { 648 strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod, 649 sizeof(dev->t10_wwn.model)); 650 } 651 da->emulate_model_alias = flag; 652 return count; 653 } 654 655 static ssize_t emulate_write_cache_store(struct config_item *item, 656 const char *page, size_t count) 657 { 658 struct se_dev_attrib *da = to_attrib(item); 659 bool flag; 660 int ret; 661 662 ret = strtobool(page, &flag); 663 if (ret < 0) 664 return ret; 665 666 if (flag && da->da_dev->transport->get_write_cache) { 667 pr_err("emulate_write_cache not supported for this device\n"); 668 return -EINVAL; 669 } 670 671 da->emulate_write_cache = flag; 672 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 673 da->da_dev, flag); 674 return count; 675 } 676 677 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item, 678 const char *page, size_t count) 679 { 680 struct se_dev_attrib *da = to_attrib(item); 681 u32 val; 682 int ret; 683 684 ret = kstrtou32(page, 0, &val); 685 if (ret < 0) 686 return ret; 687 688 if (val != TARGET_UA_INTLCK_CTRL_CLEAR 689 && val != TARGET_UA_INTLCK_CTRL_NO_CLEAR 690 && val != TARGET_UA_INTLCK_CTRL_ESTABLISH_UA) { 691 pr_err("Illegal value %d\n", val); 692 return -EINVAL; 693 } 694 695 if (da->da_dev->export_count) { 696 pr_err("dev[%p]: Unable to change SE Device" 697 " UA_INTRLCK_CTRL while export_count is %d\n", 698 da->da_dev, da->da_dev->export_count); 699 return -EINVAL; 700 } 701 da->emulate_ua_intlck_ctrl = val; 702 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 703 da->da_dev, val); 704 return count; 705 } 706 707 static ssize_t emulate_tas_store(struct config_item *item, 708 const char *page, size_t count) 709 { 710 struct se_dev_attrib *da = to_attrib(item); 711 bool flag; 712 int ret; 713 714 ret = strtobool(page, &flag); 715 if (ret < 0) 716 return ret; 717 718 if (da->da_dev->export_count) { 719 pr_err("dev[%p]: Unable to change SE Device TAS while" 720 " export_count is %d\n", 721 da->da_dev, da->da_dev->export_count); 722 return -EINVAL; 723 } 724 da->emulate_tas = flag; 725 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 726 da->da_dev, flag ? "Enabled" : "Disabled"); 727 728 return count; 729 } 730 731 static ssize_t emulate_tpu_store(struct config_item *item, 732 const char *page, size_t count) 733 { 734 struct se_dev_attrib *da = to_attrib(item); 735 struct se_device *dev = da->da_dev; 736 bool flag; 737 int ret; 738 739 ret = strtobool(page, &flag); 740 if (ret < 0) 741 return ret; 742 743 /* 744 * We expect this value to be non-zero when generic Block Layer 745 * Discard supported is detected iblock_create_virtdevice(). 746 */ 747 if (flag && !da->max_unmap_block_desc_count) { 748 if (!dev->transport->configure_unmap || 749 !dev->transport->configure_unmap(dev)) { 750 pr_err("Generic Block Discard not supported\n"); 751 return -ENOSYS; 752 } 753 } 754 755 da->emulate_tpu = flag; 756 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 757 da->da_dev, flag); 758 return count; 759 } 760 761 static ssize_t emulate_tpws_store(struct config_item *item, 762 const char *page, size_t count) 763 { 764 struct se_dev_attrib *da = to_attrib(item); 765 struct se_device *dev = da->da_dev; 766 bool flag; 767 int ret; 768 769 ret = strtobool(page, &flag); 770 if (ret < 0) 771 return ret; 772 773 /* 774 * We expect this value to be non-zero when generic Block Layer 775 * Discard supported is detected iblock_create_virtdevice(). 776 */ 777 if (flag && !da->max_unmap_block_desc_count) { 778 if (!dev->transport->configure_unmap || 779 !dev->transport->configure_unmap(dev)) { 780 pr_err("Generic Block Discard not supported\n"); 781 return -ENOSYS; 782 } 783 } 784 785 da->emulate_tpws = flag; 786 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 787 da->da_dev, flag); 788 return count; 789 } 790 791 static ssize_t pi_prot_type_store(struct config_item *item, 792 const char *page, size_t count) 793 { 794 struct se_dev_attrib *da = to_attrib(item); 795 int old_prot = da->pi_prot_type, ret; 796 struct se_device *dev = da->da_dev; 797 u32 flag; 798 799 ret = kstrtou32(page, 0, &flag); 800 if (ret < 0) 801 return ret; 802 803 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) { 804 pr_err("Illegal value %d for pi_prot_type\n", flag); 805 return -EINVAL; 806 } 807 if (flag == 2) { 808 pr_err("DIF TYPE2 protection currently not supported\n"); 809 return -ENOSYS; 810 } 811 if (da->hw_pi_prot_type) { 812 pr_warn("DIF protection enabled on underlying hardware," 813 " ignoring\n"); 814 return count; 815 } 816 if (!dev->transport->init_prot || !dev->transport->free_prot) { 817 /* 0 is only allowed value for non-supporting backends */ 818 if (flag == 0) 819 return count; 820 821 pr_err("DIF protection not supported by backend: %s\n", 822 dev->transport->name); 823 return -ENOSYS; 824 } 825 if (!target_dev_configured(dev)) { 826 pr_err("DIF protection requires device to be configured\n"); 827 return -ENODEV; 828 } 829 if (dev->export_count) { 830 pr_err("dev[%p]: Unable to change SE Device PROT type while" 831 " export_count is %d\n", dev, dev->export_count); 832 return -EINVAL; 833 } 834 835 da->pi_prot_type = flag; 836 837 if (flag && !old_prot) { 838 ret = dev->transport->init_prot(dev); 839 if (ret) { 840 da->pi_prot_type = old_prot; 841 da->pi_prot_verify = (bool) da->pi_prot_type; 842 return ret; 843 } 844 845 } else if (!flag && old_prot) { 846 dev->transport->free_prot(dev); 847 } 848 849 da->pi_prot_verify = (bool) da->pi_prot_type; 850 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag); 851 return count; 852 } 853 854 /* always zero, but attr needs to remain RW to avoid userspace breakage */ 855 static ssize_t pi_prot_format_show(struct config_item *item, char *page) 856 { 857 return snprintf(page, PAGE_SIZE, "0\n"); 858 } 859 860 static ssize_t pi_prot_format_store(struct config_item *item, 861 const char *page, size_t count) 862 { 863 struct se_dev_attrib *da = to_attrib(item); 864 struct se_device *dev = da->da_dev; 865 bool flag; 866 int ret; 867 868 ret = strtobool(page, &flag); 869 if (ret < 0) 870 return ret; 871 872 if (!flag) 873 return count; 874 875 if (!dev->transport->format_prot) { 876 pr_err("DIF protection format not supported by backend %s\n", 877 dev->transport->name); 878 return -ENOSYS; 879 } 880 if (!target_dev_configured(dev)) { 881 pr_err("DIF protection format requires device to be configured\n"); 882 return -ENODEV; 883 } 884 if (dev->export_count) { 885 pr_err("dev[%p]: Unable to format SE Device PROT type while" 886 " export_count is %d\n", dev, dev->export_count); 887 return -EINVAL; 888 } 889 890 ret = dev->transport->format_prot(dev); 891 if (ret) 892 return ret; 893 894 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev); 895 return count; 896 } 897 898 static ssize_t pi_prot_verify_store(struct config_item *item, 899 const char *page, size_t count) 900 { 901 struct se_dev_attrib *da = to_attrib(item); 902 bool flag; 903 int ret; 904 905 ret = strtobool(page, &flag); 906 if (ret < 0) 907 return ret; 908 909 if (!flag) { 910 da->pi_prot_verify = flag; 911 return count; 912 } 913 if (da->hw_pi_prot_type) { 914 pr_warn("DIF protection enabled on underlying hardware," 915 " ignoring\n"); 916 return count; 917 } 918 if (!da->pi_prot_type) { 919 pr_warn("DIF protection not supported by backend, ignoring\n"); 920 return count; 921 } 922 da->pi_prot_verify = flag; 923 924 return count; 925 } 926 927 static ssize_t force_pr_aptpl_store(struct config_item *item, 928 const char *page, size_t count) 929 { 930 struct se_dev_attrib *da = to_attrib(item); 931 bool flag; 932 int ret; 933 934 ret = strtobool(page, &flag); 935 if (ret < 0) 936 return ret; 937 if (da->da_dev->export_count) { 938 pr_err("dev[%p]: Unable to set force_pr_aptpl while" 939 " export_count is %d\n", 940 da->da_dev, da->da_dev->export_count); 941 return -EINVAL; 942 } 943 944 da->force_pr_aptpl = flag; 945 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag); 946 return count; 947 } 948 949 static ssize_t emulate_rest_reord_store(struct config_item *item, 950 const char *page, size_t count) 951 { 952 struct se_dev_attrib *da = to_attrib(item); 953 bool flag; 954 int ret; 955 956 ret = strtobool(page, &flag); 957 if (ret < 0) 958 return ret; 959 960 if (flag != 0) { 961 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted" 962 " reordering not implemented\n", da->da_dev); 963 return -ENOSYS; 964 } 965 da->emulate_rest_reord = flag; 966 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", 967 da->da_dev, flag); 968 return count; 969 } 970 971 static ssize_t unmap_zeroes_data_store(struct config_item *item, 972 const char *page, size_t count) 973 { 974 struct se_dev_attrib *da = to_attrib(item); 975 struct se_device *dev = da->da_dev; 976 bool flag; 977 int ret; 978 979 ret = strtobool(page, &flag); 980 if (ret < 0) 981 return ret; 982 983 if (da->da_dev->export_count) { 984 pr_err("dev[%p]: Unable to change SE Device" 985 " unmap_zeroes_data while export_count is %d\n", 986 da->da_dev, da->da_dev->export_count); 987 return -EINVAL; 988 } 989 /* 990 * We expect this value to be non-zero when generic Block Layer 991 * Discard supported is detected iblock_configure_device(). 992 */ 993 if (flag && !da->max_unmap_block_desc_count) { 994 if (!dev->transport->configure_unmap || 995 !dev->transport->configure_unmap(dev)) { 996 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set because max_unmap_block_desc_count is zero\n", 997 da->da_dev); 998 return -ENOSYS; 999 } 1000 } 1001 da->unmap_zeroes_data = flag; 1002 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n", 1003 da->da_dev, flag); 1004 return count; 1005 } 1006 1007 /* 1008 * Note, this can only be called on unexported SE Device Object. 1009 */ 1010 static ssize_t queue_depth_store(struct config_item *item, 1011 const char *page, size_t count) 1012 { 1013 struct se_dev_attrib *da = to_attrib(item); 1014 struct se_device *dev = da->da_dev; 1015 u32 val; 1016 int ret; 1017 1018 ret = kstrtou32(page, 0, &val); 1019 if (ret < 0) 1020 return ret; 1021 1022 if (dev->export_count) { 1023 pr_err("dev[%p]: Unable to change SE Device TCQ while" 1024 " export_count is %d\n", 1025 dev, dev->export_count); 1026 return -EINVAL; 1027 } 1028 if (!val) { 1029 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev); 1030 return -EINVAL; 1031 } 1032 1033 if (val > dev->dev_attrib.queue_depth) { 1034 if (val > dev->dev_attrib.hw_queue_depth) { 1035 pr_err("dev[%p]: Passed queue_depth:" 1036 " %u exceeds TCM/SE_Device MAX" 1037 " TCQ: %u\n", dev, val, 1038 dev->dev_attrib.hw_queue_depth); 1039 return -EINVAL; 1040 } 1041 } 1042 da->queue_depth = dev->queue_depth = val; 1043 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val); 1044 return count; 1045 } 1046 1047 static ssize_t optimal_sectors_store(struct config_item *item, 1048 const char *page, size_t count) 1049 { 1050 struct se_dev_attrib *da = to_attrib(item); 1051 u32 val; 1052 int ret; 1053 1054 ret = kstrtou32(page, 0, &val); 1055 if (ret < 0) 1056 return ret; 1057 1058 if (da->da_dev->export_count) { 1059 pr_err("dev[%p]: Unable to change SE Device" 1060 " optimal_sectors while export_count is %d\n", 1061 da->da_dev, da->da_dev->export_count); 1062 return -EINVAL; 1063 } 1064 if (val > da->hw_max_sectors) { 1065 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1066 " greater than hw_max_sectors: %u\n", 1067 da->da_dev, val, da->hw_max_sectors); 1068 return -EINVAL; 1069 } 1070 1071 da->optimal_sectors = val; 1072 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1073 da->da_dev, val); 1074 return count; 1075 } 1076 1077 static ssize_t block_size_store(struct config_item *item, 1078 const char *page, size_t count) 1079 { 1080 struct se_dev_attrib *da = to_attrib(item); 1081 u32 val; 1082 int ret; 1083 1084 ret = kstrtou32(page, 0, &val); 1085 if (ret < 0) 1086 return ret; 1087 1088 if (da->da_dev->export_count) { 1089 pr_err("dev[%p]: Unable to change SE Device block_size" 1090 " while export_count is %d\n", 1091 da->da_dev, da->da_dev->export_count); 1092 return -EINVAL; 1093 } 1094 1095 if (val != 512 && val != 1024 && val != 2048 && val != 4096) { 1096 pr_err("dev[%p]: Illegal value for block_device: %u" 1097 " for SE device, must be 512, 1024, 2048 or 4096\n", 1098 da->da_dev, val); 1099 return -EINVAL; 1100 } 1101 1102 da->block_size = val; 1103 if (da->max_bytes_per_io) 1104 da->hw_max_sectors = da->max_bytes_per_io / val; 1105 1106 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1107 da->da_dev, val); 1108 return count; 1109 } 1110 1111 static ssize_t alua_support_show(struct config_item *item, char *page) 1112 { 1113 struct se_dev_attrib *da = to_attrib(item); 1114 u8 flags = da->da_dev->transport_flags; 1115 1116 return snprintf(page, PAGE_SIZE, "%d\n", 1117 flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1); 1118 } 1119 1120 static ssize_t alua_support_store(struct config_item *item, 1121 const char *page, size_t count) 1122 { 1123 struct se_dev_attrib *da = to_attrib(item); 1124 struct se_device *dev = da->da_dev; 1125 bool flag, oldflag; 1126 int ret; 1127 1128 ret = strtobool(page, &flag); 1129 if (ret < 0) 1130 return ret; 1131 1132 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA); 1133 if (flag == oldflag) 1134 return count; 1135 1136 if (!(dev->transport->transport_flags_changeable & 1137 TRANSPORT_FLAG_PASSTHROUGH_ALUA)) { 1138 pr_err("dev[%p]: Unable to change SE Device alua_support:" 1139 " alua_support has fixed value\n", dev); 1140 return -ENOSYS; 1141 } 1142 1143 if (flag) 1144 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_ALUA; 1145 else 1146 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_ALUA; 1147 return count; 1148 } 1149 1150 static ssize_t pgr_support_show(struct config_item *item, char *page) 1151 { 1152 struct se_dev_attrib *da = to_attrib(item); 1153 u8 flags = da->da_dev->transport_flags; 1154 1155 return snprintf(page, PAGE_SIZE, "%d\n", 1156 flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1); 1157 } 1158 1159 static ssize_t pgr_support_store(struct config_item *item, 1160 const char *page, size_t count) 1161 { 1162 struct se_dev_attrib *da = to_attrib(item); 1163 struct se_device *dev = da->da_dev; 1164 bool flag, oldflag; 1165 int ret; 1166 1167 ret = strtobool(page, &flag); 1168 if (ret < 0) 1169 return ret; 1170 1171 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR); 1172 if (flag == oldflag) 1173 return count; 1174 1175 if (!(dev->transport->transport_flags_changeable & 1176 TRANSPORT_FLAG_PASSTHROUGH_PGR)) { 1177 pr_err("dev[%p]: Unable to change SE Device pgr_support:" 1178 " pgr_support has fixed value\n", dev); 1179 return -ENOSYS; 1180 } 1181 1182 if (flag) 1183 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_PGR; 1184 else 1185 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_PGR; 1186 return count; 1187 } 1188 1189 CONFIGFS_ATTR(, emulate_model_alias); 1190 CONFIGFS_ATTR(, emulate_dpo); 1191 CONFIGFS_ATTR(, emulate_fua_write); 1192 CONFIGFS_ATTR(, emulate_fua_read); 1193 CONFIGFS_ATTR(, emulate_write_cache); 1194 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl); 1195 CONFIGFS_ATTR(, emulate_tas); 1196 CONFIGFS_ATTR(, emulate_tpu); 1197 CONFIGFS_ATTR(, emulate_tpws); 1198 CONFIGFS_ATTR(, emulate_caw); 1199 CONFIGFS_ATTR(, emulate_3pc); 1200 CONFIGFS_ATTR(, emulate_pr); 1201 CONFIGFS_ATTR(, pi_prot_type); 1202 CONFIGFS_ATTR_RO(, hw_pi_prot_type); 1203 CONFIGFS_ATTR(, pi_prot_format); 1204 CONFIGFS_ATTR(, pi_prot_verify); 1205 CONFIGFS_ATTR(, enforce_pr_isids); 1206 CONFIGFS_ATTR(, is_nonrot); 1207 CONFIGFS_ATTR(, emulate_rest_reord); 1208 CONFIGFS_ATTR(, force_pr_aptpl); 1209 CONFIGFS_ATTR_RO(, hw_block_size); 1210 CONFIGFS_ATTR(, block_size); 1211 CONFIGFS_ATTR_RO(, hw_max_sectors); 1212 CONFIGFS_ATTR(, optimal_sectors); 1213 CONFIGFS_ATTR_RO(, hw_queue_depth); 1214 CONFIGFS_ATTR(, queue_depth); 1215 CONFIGFS_ATTR(, max_unmap_lba_count); 1216 CONFIGFS_ATTR(, max_unmap_block_desc_count); 1217 CONFIGFS_ATTR(, unmap_granularity); 1218 CONFIGFS_ATTR(, unmap_granularity_alignment); 1219 CONFIGFS_ATTR(, unmap_zeroes_data); 1220 CONFIGFS_ATTR(, max_write_same_len); 1221 CONFIGFS_ATTR(, alua_support); 1222 CONFIGFS_ATTR(, pgr_support); 1223 1224 /* 1225 * dev_attrib attributes for devices using the target core SBC/SPC 1226 * interpreter. Any backend using spc_parse_cdb should be using 1227 * these. 1228 */ 1229 struct configfs_attribute *sbc_attrib_attrs[] = { 1230 &attr_emulate_model_alias, 1231 &attr_emulate_dpo, 1232 &attr_emulate_fua_write, 1233 &attr_emulate_fua_read, 1234 &attr_emulate_write_cache, 1235 &attr_emulate_ua_intlck_ctrl, 1236 &attr_emulate_tas, 1237 &attr_emulate_tpu, 1238 &attr_emulate_tpws, 1239 &attr_emulate_caw, 1240 &attr_emulate_3pc, 1241 &attr_emulate_pr, 1242 &attr_pi_prot_type, 1243 &attr_hw_pi_prot_type, 1244 &attr_pi_prot_format, 1245 &attr_pi_prot_verify, 1246 &attr_enforce_pr_isids, 1247 &attr_is_nonrot, 1248 &attr_emulate_rest_reord, 1249 &attr_force_pr_aptpl, 1250 &attr_hw_block_size, 1251 &attr_block_size, 1252 &attr_hw_max_sectors, 1253 &attr_optimal_sectors, 1254 &attr_hw_queue_depth, 1255 &attr_queue_depth, 1256 &attr_max_unmap_lba_count, 1257 &attr_max_unmap_block_desc_count, 1258 &attr_unmap_granularity, 1259 &attr_unmap_granularity_alignment, 1260 &attr_unmap_zeroes_data, 1261 &attr_max_write_same_len, 1262 &attr_alua_support, 1263 &attr_pgr_support, 1264 NULL, 1265 }; 1266 EXPORT_SYMBOL(sbc_attrib_attrs); 1267 1268 /* 1269 * Minimal dev_attrib attributes for devices passing through CDBs. 1270 * In this case we only provide a few read-only attributes for 1271 * backwards compatibility. 1272 */ 1273 struct configfs_attribute *passthrough_attrib_attrs[] = { 1274 &attr_hw_pi_prot_type, 1275 &attr_hw_block_size, 1276 &attr_hw_max_sectors, 1277 &attr_hw_queue_depth, 1278 &attr_emulate_pr, 1279 &attr_alua_support, 1280 &attr_pgr_support, 1281 NULL, 1282 }; 1283 EXPORT_SYMBOL(passthrough_attrib_attrs); 1284 1285 /* 1286 * pr related dev_attrib attributes for devices passing through CDBs, 1287 * but allowing in core pr emulation. 1288 */ 1289 struct configfs_attribute *passthrough_pr_attrib_attrs[] = { 1290 &attr_enforce_pr_isids, 1291 &attr_force_pr_aptpl, 1292 NULL, 1293 }; 1294 EXPORT_SYMBOL(passthrough_pr_attrib_attrs); 1295 1296 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL); 1297 TB_CIT_SETUP_DRV(dev_action, NULL, NULL); 1298 1299 /* End functions for struct config_item_type tb_dev_attrib_cit */ 1300 1301 /* Start functions for struct config_item_type tb_dev_wwn_cit */ 1302 1303 static struct t10_wwn *to_t10_wwn(struct config_item *item) 1304 { 1305 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group); 1306 } 1307 1308 static ssize_t target_check_inquiry_data(char *buf) 1309 { 1310 size_t len; 1311 int i; 1312 1313 len = strlen(buf); 1314 1315 /* 1316 * SPC 4.3.1: 1317 * ASCII data fields shall contain only ASCII printable characters 1318 * (i.e., code values 20h to 7Eh) and may be terminated with one or 1319 * more ASCII null (00h) characters. 1320 */ 1321 for (i = 0; i < len; i++) { 1322 if (buf[i] < 0x20 || buf[i] > 0x7E) { 1323 pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n"); 1324 return -EINVAL; 1325 } 1326 } 1327 1328 return len; 1329 } 1330 1331 /* 1332 * STANDARD and VPD page 0x83 T10 Vendor Identification 1333 */ 1334 static ssize_t target_wwn_vendor_id_show(struct config_item *item, 1335 char *page) 1336 { 1337 return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]); 1338 } 1339 1340 static ssize_t target_wwn_vendor_id_store(struct config_item *item, 1341 const char *page, size_t count) 1342 { 1343 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1344 struct se_device *dev = t10_wwn->t10_dev; 1345 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1346 unsigned char buf[INQUIRY_VENDOR_LEN + 2]; 1347 char *stripped = NULL; 1348 size_t len; 1349 ssize_t ret; 1350 1351 len = strlcpy(buf, page, sizeof(buf)); 1352 if (len < sizeof(buf)) { 1353 /* Strip any newline added from userspace. */ 1354 stripped = strstrip(buf); 1355 len = strlen(stripped); 1356 } 1357 if (len > INQUIRY_VENDOR_LEN) { 1358 pr_err("Emulated T10 Vendor Identification exceeds" 1359 " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN) 1360 "\n"); 1361 return -EOVERFLOW; 1362 } 1363 1364 ret = target_check_inquiry_data(stripped); 1365 1366 if (ret < 0) 1367 return ret; 1368 1369 /* 1370 * Check to see if any active exports exist. If they do exist, fail 1371 * here as changing this information on the fly (underneath the 1372 * initiator side OS dependent multipath code) could cause negative 1373 * effects. 1374 */ 1375 if (dev->export_count) { 1376 pr_err("Unable to set T10 Vendor Identification while" 1377 " active %d exports exist\n", dev->export_count); 1378 return -EINVAL; 1379 } 1380 1381 BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1); 1382 strlcpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor)); 1383 1384 pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:" 1385 " %s\n", dev->t10_wwn.vendor); 1386 1387 return count; 1388 } 1389 1390 static ssize_t target_wwn_product_id_show(struct config_item *item, 1391 char *page) 1392 { 1393 return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]); 1394 } 1395 1396 static ssize_t target_wwn_product_id_store(struct config_item *item, 1397 const char *page, size_t count) 1398 { 1399 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1400 struct se_device *dev = t10_wwn->t10_dev; 1401 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1402 unsigned char buf[INQUIRY_MODEL_LEN + 2]; 1403 char *stripped = NULL; 1404 size_t len; 1405 ssize_t ret; 1406 1407 len = strlcpy(buf, page, sizeof(buf)); 1408 if (len < sizeof(buf)) { 1409 /* Strip any newline added from userspace. */ 1410 stripped = strstrip(buf); 1411 len = strlen(stripped); 1412 } 1413 if (len > INQUIRY_MODEL_LEN) { 1414 pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: " 1415 __stringify(INQUIRY_MODEL_LEN) 1416 "\n"); 1417 return -EOVERFLOW; 1418 } 1419 1420 ret = target_check_inquiry_data(stripped); 1421 1422 if (ret < 0) 1423 return ret; 1424 1425 /* 1426 * Check to see if any active exports exist. If they do exist, fail 1427 * here as changing this information on the fly (underneath the 1428 * initiator side OS dependent multipath code) could cause negative 1429 * effects. 1430 */ 1431 if (dev->export_count) { 1432 pr_err("Unable to set T10 Model while active %d exports exist\n", 1433 dev->export_count); 1434 return -EINVAL; 1435 } 1436 1437 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); 1438 strlcpy(dev->t10_wwn.model, stripped, sizeof(dev->t10_wwn.model)); 1439 1440 pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n", 1441 dev->t10_wwn.model); 1442 1443 return count; 1444 } 1445 1446 static ssize_t target_wwn_revision_show(struct config_item *item, 1447 char *page) 1448 { 1449 return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]); 1450 } 1451 1452 static ssize_t target_wwn_revision_store(struct config_item *item, 1453 const char *page, size_t count) 1454 { 1455 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1456 struct se_device *dev = t10_wwn->t10_dev; 1457 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1458 unsigned char buf[INQUIRY_REVISION_LEN + 2]; 1459 char *stripped = NULL; 1460 size_t len; 1461 ssize_t ret; 1462 1463 len = strlcpy(buf, page, sizeof(buf)); 1464 if (len < sizeof(buf)) { 1465 /* Strip any newline added from userspace. */ 1466 stripped = strstrip(buf); 1467 len = strlen(stripped); 1468 } 1469 if (len > INQUIRY_REVISION_LEN) { 1470 pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: " 1471 __stringify(INQUIRY_REVISION_LEN) 1472 "\n"); 1473 return -EOVERFLOW; 1474 } 1475 1476 ret = target_check_inquiry_data(stripped); 1477 1478 if (ret < 0) 1479 return ret; 1480 1481 /* 1482 * Check to see if any active exports exist. If they do exist, fail 1483 * here as changing this information on the fly (underneath the 1484 * initiator side OS dependent multipath code) could cause negative 1485 * effects. 1486 */ 1487 if (dev->export_count) { 1488 pr_err("Unable to set T10 Revision while active %d exports exist\n", 1489 dev->export_count); 1490 return -EINVAL; 1491 } 1492 1493 BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1); 1494 strlcpy(dev->t10_wwn.revision, stripped, sizeof(dev->t10_wwn.revision)); 1495 1496 pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n", 1497 dev->t10_wwn.revision); 1498 1499 return count; 1500 } 1501 1502 static ssize_t 1503 target_wwn_company_id_show(struct config_item *item, 1504 char *page) 1505 { 1506 return snprintf(page, PAGE_SIZE, "%#08x\n", 1507 to_t10_wwn(item)->company_id); 1508 } 1509 1510 static ssize_t 1511 target_wwn_company_id_store(struct config_item *item, 1512 const char *page, size_t count) 1513 { 1514 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1515 struct se_device *dev = t10_wwn->t10_dev; 1516 u32 val; 1517 int ret; 1518 1519 /* 1520 * The IEEE COMPANY_ID field should contain a 24-bit canonical 1521 * form OUI assigned by the IEEE. 1522 */ 1523 ret = kstrtou32(page, 0, &val); 1524 if (ret < 0) 1525 return ret; 1526 1527 if (val >= 0x1000000) 1528 return -EOVERFLOW; 1529 1530 /* 1531 * Check to see if any active exports exist. If they do exist, fail 1532 * here as changing this information on the fly (underneath the 1533 * initiator side OS dependent multipath code) could cause negative 1534 * effects. 1535 */ 1536 if (dev->export_count) { 1537 pr_err("Unable to set Company ID while %u exports exist\n", 1538 dev->export_count); 1539 return -EINVAL; 1540 } 1541 1542 t10_wwn->company_id = val; 1543 1544 pr_debug("Target_Core_ConfigFS: Set IEEE Company ID: %#08x\n", 1545 t10_wwn->company_id); 1546 1547 return count; 1548 } 1549 1550 /* 1551 * VPD page 0x80 Unit serial 1552 */ 1553 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item, 1554 char *page) 1555 { 1556 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 1557 &to_t10_wwn(item)->unit_serial[0]); 1558 } 1559 1560 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item, 1561 const char *page, size_t count) 1562 { 1563 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1564 struct se_device *dev = t10_wwn->t10_dev; 1565 unsigned char buf[INQUIRY_VPD_SERIAL_LEN] = { }; 1566 1567 /* 1568 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 1569 * from the struct scsi_device level firmware, do not allow 1570 * VPD Unit Serial to be emulated. 1571 * 1572 * Note this struct scsi_device could also be emulating VPD 1573 * information from its drivers/scsi LLD. But for now we assume 1574 * it is doing 'the right thing' wrt a world wide unique 1575 * VPD Unit Serial Number that OS dependent multipath can depend on. 1576 */ 1577 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) { 1578 pr_err("Underlying SCSI device firmware provided VPD" 1579 " Unit Serial, ignoring request\n"); 1580 return -EOPNOTSUPP; 1581 } 1582 1583 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 1584 pr_err("Emulated VPD Unit Serial exceeds" 1585 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 1586 return -EOVERFLOW; 1587 } 1588 /* 1589 * Check to see if any active $FABRIC_MOD exports exist. If they 1590 * do exist, fail here as changing this information on the fly 1591 * (underneath the initiator side OS dependent multipath code) 1592 * could cause negative effects. 1593 */ 1594 if (dev->export_count) { 1595 pr_err("Unable to set VPD Unit Serial while" 1596 " active %d $FABRIC_MOD exports exist\n", 1597 dev->export_count); 1598 return -EINVAL; 1599 } 1600 1601 /* 1602 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 1603 * 1604 * Also, strip any newline added from the userspace 1605 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 1606 */ 1607 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 1608 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 1609 "%s", strstrip(buf)); 1610 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL; 1611 1612 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 1613 " %s\n", dev->t10_wwn.unit_serial); 1614 1615 return count; 1616 } 1617 1618 /* 1619 * VPD page 0x83 Protocol Identifier 1620 */ 1621 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item, 1622 char *page) 1623 { 1624 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1625 struct t10_vpd *vpd; 1626 unsigned char buf[VPD_TMP_BUF_SIZE] = { }; 1627 ssize_t len = 0; 1628 1629 spin_lock(&t10_wwn->t10_vpd_lock); 1630 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 1631 if (!vpd->protocol_identifier_set) 1632 continue; 1633 1634 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 1635 1636 if (len + strlen(buf) >= PAGE_SIZE) 1637 break; 1638 1639 len += sprintf(page+len, "%s", buf); 1640 } 1641 spin_unlock(&t10_wwn->t10_vpd_lock); 1642 1643 return len; 1644 } 1645 1646 /* 1647 * Generic wrapper for dumping VPD identifiers by association. 1648 */ 1649 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 1650 static ssize_t target_wwn_##_name##_show(struct config_item *item, \ 1651 char *page) \ 1652 { \ 1653 struct t10_wwn *t10_wwn = to_t10_wwn(item); \ 1654 struct t10_vpd *vpd; \ 1655 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 1656 ssize_t len = 0; \ 1657 \ 1658 spin_lock(&t10_wwn->t10_vpd_lock); \ 1659 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 1660 if (vpd->association != _assoc) \ 1661 continue; \ 1662 \ 1663 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1664 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 1665 if (len + strlen(buf) >= PAGE_SIZE) \ 1666 break; \ 1667 len += sprintf(page+len, "%s", buf); \ 1668 \ 1669 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1670 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 1671 if (len + strlen(buf) >= PAGE_SIZE) \ 1672 break; \ 1673 len += sprintf(page+len, "%s", buf); \ 1674 \ 1675 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1676 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 1677 if (len + strlen(buf) >= PAGE_SIZE) \ 1678 break; \ 1679 len += sprintf(page+len, "%s", buf); \ 1680 } \ 1681 spin_unlock(&t10_wwn->t10_vpd_lock); \ 1682 \ 1683 return len; \ 1684 } 1685 1686 /* VPD page 0x83 Association: Logical Unit */ 1687 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 1688 /* VPD page 0x83 Association: Target Port */ 1689 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 1690 /* VPD page 0x83 Association: SCSI Target Device */ 1691 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 1692 1693 CONFIGFS_ATTR(target_wwn_, vendor_id); 1694 CONFIGFS_ATTR(target_wwn_, product_id); 1695 CONFIGFS_ATTR(target_wwn_, revision); 1696 CONFIGFS_ATTR(target_wwn_, company_id); 1697 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial); 1698 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier); 1699 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit); 1700 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port); 1701 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device); 1702 1703 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 1704 &target_wwn_attr_vendor_id, 1705 &target_wwn_attr_product_id, 1706 &target_wwn_attr_revision, 1707 &target_wwn_attr_company_id, 1708 &target_wwn_attr_vpd_unit_serial, 1709 &target_wwn_attr_vpd_protocol_identifier, 1710 &target_wwn_attr_vpd_assoc_logical_unit, 1711 &target_wwn_attr_vpd_assoc_target_port, 1712 &target_wwn_attr_vpd_assoc_scsi_target_device, 1713 NULL, 1714 }; 1715 1716 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs); 1717 1718 /* End functions for struct config_item_type tb_dev_wwn_cit */ 1719 1720 /* Start functions for struct config_item_type tb_dev_pr_cit */ 1721 1722 static struct se_device *pr_to_dev(struct config_item *item) 1723 { 1724 return container_of(to_config_group(item), struct se_device, 1725 dev_pr_group); 1726 } 1727 1728 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev, 1729 char *page) 1730 { 1731 struct se_node_acl *se_nacl; 1732 struct t10_pr_registration *pr_reg; 1733 char i_buf[PR_REG_ISID_ID_LEN] = { }; 1734 1735 pr_reg = dev->dev_pr_res_holder; 1736 if (!pr_reg) 1737 return sprintf(page, "No SPC-3 Reservation holder\n"); 1738 1739 se_nacl = pr_reg->pr_reg_nacl; 1740 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1741 1742 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", 1743 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1744 se_nacl->initiatorname, i_buf); 1745 } 1746 1747 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, 1748 char *page) 1749 { 1750 struct se_session *sess = dev->reservation_holder; 1751 struct se_node_acl *se_nacl; 1752 ssize_t len; 1753 1754 if (sess) { 1755 se_nacl = sess->se_node_acl; 1756 len = sprintf(page, 1757 "SPC-2 Reservation: %s Initiator: %s\n", 1758 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1759 se_nacl->initiatorname); 1760 } else { 1761 len = sprintf(page, "No SPC-2 Reservation holder\n"); 1762 } 1763 return len; 1764 } 1765 1766 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page) 1767 { 1768 struct se_device *dev = pr_to_dev(item); 1769 int ret; 1770 1771 if (!dev->dev_attrib.emulate_pr) 1772 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 1773 1774 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1775 return sprintf(page, "Passthrough\n"); 1776 1777 spin_lock(&dev->dev_reservation_lock); 1778 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1779 ret = target_core_dev_pr_show_spc2_res(dev, page); 1780 else 1781 ret = target_core_dev_pr_show_spc3_res(dev, page); 1782 spin_unlock(&dev->dev_reservation_lock); 1783 return ret; 1784 } 1785 1786 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item, 1787 char *page) 1788 { 1789 struct se_device *dev = pr_to_dev(item); 1790 ssize_t len = 0; 1791 1792 spin_lock(&dev->dev_reservation_lock); 1793 if (!dev->dev_pr_res_holder) { 1794 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1795 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { 1796 len = sprintf(page, "SPC-3 Reservation: All Target" 1797 " Ports registration\n"); 1798 } else { 1799 len = sprintf(page, "SPC-3 Reservation: Single" 1800 " Target Port registration\n"); 1801 } 1802 1803 spin_unlock(&dev->dev_reservation_lock); 1804 return len; 1805 } 1806 1807 static ssize_t target_pr_res_pr_generation_show(struct config_item *item, 1808 char *page) 1809 { 1810 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation); 1811 } 1812 1813 1814 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item, 1815 char *page) 1816 { 1817 struct se_device *dev = pr_to_dev(item); 1818 struct se_node_acl *se_nacl; 1819 struct se_portal_group *se_tpg; 1820 struct t10_pr_registration *pr_reg; 1821 const struct target_core_fabric_ops *tfo; 1822 ssize_t len = 0; 1823 1824 spin_lock(&dev->dev_reservation_lock); 1825 pr_reg = dev->dev_pr_res_holder; 1826 if (!pr_reg) { 1827 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1828 goto out_unlock; 1829 } 1830 1831 se_nacl = pr_reg->pr_reg_nacl; 1832 se_tpg = se_nacl->se_tpg; 1833 tfo = se_tpg->se_tpg_tfo; 1834 1835 len += sprintf(page+len, "SPC-3 Reservation: %s" 1836 " Target Node Endpoint: %s\n", tfo->fabric_name, 1837 tfo->tpg_get_wwn(se_tpg)); 1838 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1839 " Identifier Tag: %hu %s Portal Group Tag: %hu" 1840 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi, 1841 tfo->fabric_name, tfo->tpg_get_tag(se_tpg), 1842 tfo->fabric_name, pr_reg->pr_aptpl_target_lun); 1843 1844 out_unlock: 1845 spin_unlock(&dev->dev_reservation_lock); 1846 return len; 1847 } 1848 1849 1850 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item, 1851 char *page) 1852 { 1853 struct se_device *dev = pr_to_dev(item); 1854 const struct target_core_fabric_ops *tfo; 1855 struct t10_pr_registration *pr_reg; 1856 unsigned char buf[384]; 1857 char i_buf[PR_REG_ISID_ID_LEN]; 1858 ssize_t len = 0; 1859 int reg_count = 0; 1860 1861 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1862 1863 spin_lock(&dev->t10_pr.registration_lock); 1864 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1865 pr_reg_list) { 1866 1867 memset(buf, 0, 384); 1868 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1869 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1870 core_pr_dump_initiator_port(pr_reg, i_buf, 1871 PR_REG_ISID_ID_LEN); 1872 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1873 tfo->fabric_name, 1874 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, 1875 pr_reg->pr_res_generation); 1876 1877 if (len + strlen(buf) >= PAGE_SIZE) 1878 break; 1879 1880 len += sprintf(page+len, "%s", buf); 1881 reg_count++; 1882 } 1883 spin_unlock(&dev->t10_pr.registration_lock); 1884 1885 if (!reg_count) 1886 len += sprintf(page+len, "None\n"); 1887 1888 return len; 1889 } 1890 1891 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page) 1892 { 1893 struct se_device *dev = pr_to_dev(item); 1894 struct t10_pr_registration *pr_reg; 1895 ssize_t len = 0; 1896 1897 spin_lock(&dev->dev_reservation_lock); 1898 pr_reg = dev->dev_pr_res_holder; 1899 if (pr_reg) { 1900 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1901 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 1902 } else { 1903 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1904 } 1905 1906 spin_unlock(&dev->dev_reservation_lock); 1907 return len; 1908 } 1909 1910 static ssize_t target_pr_res_type_show(struct config_item *item, char *page) 1911 { 1912 struct se_device *dev = pr_to_dev(item); 1913 1914 if (!dev->dev_attrib.emulate_pr) 1915 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 1916 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1917 return sprintf(page, "SPC_PASSTHROUGH\n"); 1918 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1919 return sprintf(page, "SPC2_RESERVATIONS\n"); 1920 1921 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 1922 } 1923 1924 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item, 1925 char *page) 1926 { 1927 struct se_device *dev = pr_to_dev(item); 1928 1929 if (!dev->dev_attrib.emulate_pr || 1930 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 1931 return 0; 1932 1933 return sprintf(page, "APTPL Bit Status: %s\n", 1934 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 1935 } 1936 1937 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item, 1938 char *page) 1939 { 1940 struct se_device *dev = pr_to_dev(item); 1941 1942 if (!dev->dev_attrib.emulate_pr || 1943 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 1944 return 0; 1945 1946 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 1947 } 1948 1949 enum { 1950 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 1951 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 1952 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 1953 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 1954 }; 1955 1956 static match_table_t tokens = { 1957 {Opt_initiator_fabric, "initiator_fabric=%s"}, 1958 {Opt_initiator_node, "initiator_node=%s"}, 1959 {Opt_initiator_sid, "initiator_sid=%s"}, 1960 {Opt_sa_res_key, "sa_res_key=%s"}, 1961 {Opt_res_holder, "res_holder=%d"}, 1962 {Opt_res_type, "res_type=%d"}, 1963 {Opt_res_scope, "res_scope=%d"}, 1964 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 1965 {Opt_mapped_lun, "mapped_lun=%u"}, 1966 {Opt_target_fabric, "target_fabric=%s"}, 1967 {Opt_target_node, "target_node=%s"}, 1968 {Opt_tpgt, "tpgt=%d"}, 1969 {Opt_port_rtpi, "port_rtpi=%d"}, 1970 {Opt_target_lun, "target_lun=%u"}, 1971 {Opt_err, NULL} 1972 }; 1973 1974 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item, 1975 const char *page, size_t count) 1976 { 1977 struct se_device *dev = pr_to_dev(item); 1978 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 1979 unsigned char *t_fabric = NULL, *t_port = NULL; 1980 char *orig, *ptr, *opts; 1981 substring_t args[MAX_OPT_ARGS]; 1982 unsigned long long tmp_ll; 1983 u64 sa_res_key = 0; 1984 u64 mapped_lun = 0, target_lun = 0; 1985 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 1986 u16 tpgt = 0; 1987 u8 type = 0; 1988 1989 if (!dev->dev_attrib.emulate_pr || 1990 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 1991 return count; 1992 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1993 return count; 1994 1995 if (dev->export_count) { 1996 pr_debug("Unable to process APTPL metadata while" 1997 " active fabric exports exist\n"); 1998 return -EINVAL; 1999 } 2000 2001 opts = kstrdup(page, GFP_KERNEL); 2002 if (!opts) 2003 return -ENOMEM; 2004 2005 orig = opts; 2006 while ((ptr = strsep(&opts, ",\n")) != NULL) { 2007 if (!*ptr) 2008 continue; 2009 2010 token = match_token(ptr, tokens, args); 2011 switch (token) { 2012 case Opt_initiator_fabric: 2013 i_fabric = match_strdup(args); 2014 if (!i_fabric) { 2015 ret = -ENOMEM; 2016 goto out; 2017 } 2018 break; 2019 case Opt_initiator_node: 2020 i_port = match_strdup(args); 2021 if (!i_port) { 2022 ret = -ENOMEM; 2023 goto out; 2024 } 2025 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 2026 pr_err("APTPL metadata initiator_node=" 2027 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 2028 PR_APTPL_MAX_IPORT_LEN); 2029 ret = -EINVAL; 2030 break; 2031 } 2032 break; 2033 case Opt_initiator_sid: 2034 isid = match_strdup(args); 2035 if (!isid) { 2036 ret = -ENOMEM; 2037 goto out; 2038 } 2039 if (strlen(isid) >= PR_REG_ISID_LEN) { 2040 pr_err("APTPL metadata initiator_isid" 2041 "= exceeds PR_REG_ISID_LEN: %d\n", 2042 PR_REG_ISID_LEN); 2043 ret = -EINVAL; 2044 break; 2045 } 2046 break; 2047 case Opt_sa_res_key: 2048 ret = match_u64(args, &tmp_ll); 2049 if (ret < 0) { 2050 pr_err("kstrtoull() failed for sa_res_key=\n"); 2051 goto out; 2052 } 2053 sa_res_key = (u64)tmp_ll; 2054 break; 2055 /* 2056 * PR APTPL Metadata for Reservation 2057 */ 2058 case Opt_res_holder: 2059 ret = match_int(args, &arg); 2060 if (ret) 2061 goto out; 2062 res_holder = arg; 2063 break; 2064 case Opt_res_type: 2065 ret = match_int(args, &arg); 2066 if (ret) 2067 goto out; 2068 type = (u8)arg; 2069 break; 2070 case Opt_res_scope: 2071 ret = match_int(args, &arg); 2072 if (ret) 2073 goto out; 2074 break; 2075 case Opt_res_all_tg_pt: 2076 ret = match_int(args, &arg); 2077 if (ret) 2078 goto out; 2079 all_tg_pt = (int)arg; 2080 break; 2081 case Opt_mapped_lun: 2082 ret = match_u64(args, &tmp_ll); 2083 if (ret) 2084 goto out; 2085 mapped_lun = (u64)tmp_ll; 2086 break; 2087 /* 2088 * PR APTPL Metadata for Target Port 2089 */ 2090 case Opt_target_fabric: 2091 t_fabric = match_strdup(args); 2092 if (!t_fabric) { 2093 ret = -ENOMEM; 2094 goto out; 2095 } 2096 break; 2097 case Opt_target_node: 2098 t_port = match_strdup(args); 2099 if (!t_port) { 2100 ret = -ENOMEM; 2101 goto out; 2102 } 2103 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 2104 pr_err("APTPL metadata target_node=" 2105 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 2106 PR_APTPL_MAX_TPORT_LEN); 2107 ret = -EINVAL; 2108 break; 2109 } 2110 break; 2111 case Opt_tpgt: 2112 ret = match_int(args, &arg); 2113 if (ret) 2114 goto out; 2115 tpgt = (u16)arg; 2116 break; 2117 case Opt_port_rtpi: 2118 ret = match_int(args, &arg); 2119 if (ret) 2120 goto out; 2121 break; 2122 case Opt_target_lun: 2123 ret = match_u64(args, &tmp_ll); 2124 if (ret) 2125 goto out; 2126 target_lun = (u64)tmp_ll; 2127 break; 2128 default: 2129 break; 2130 } 2131 } 2132 2133 if (!i_port || !t_port || !sa_res_key) { 2134 pr_err("Illegal parameters for APTPL registration\n"); 2135 ret = -EINVAL; 2136 goto out; 2137 } 2138 2139 if (res_holder && !(type)) { 2140 pr_err("Illegal PR type: 0x%02x for reservation" 2141 " holder\n", type); 2142 ret = -EINVAL; 2143 goto out; 2144 } 2145 2146 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, 2147 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 2148 res_holder, all_tg_pt, type); 2149 out: 2150 kfree(i_fabric); 2151 kfree(i_port); 2152 kfree(isid); 2153 kfree(t_fabric); 2154 kfree(t_port); 2155 kfree(orig); 2156 return (ret == 0) ? count : ret; 2157 } 2158 2159 2160 CONFIGFS_ATTR_RO(target_pr_, res_holder); 2161 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts); 2162 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation); 2163 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port); 2164 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts); 2165 CONFIGFS_ATTR_RO(target_pr_, res_pr_type); 2166 CONFIGFS_ATTR_RO(target_pr_, res_type); 2167 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active); 2168 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata); 2169 2170 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 2171 &target_pr_attr_res_holder, 2172 &target_pr_attr_res_pr_all_tgt_pts, 2173 &target_pr_attr_res_pr_generation, 2174 &target_pr_attr_res_pr_holder_tg_port, 2175 &target_pr_attr_res_pr_registered_i_pts, 2176 &target_pr_attr_res_pr_type, 2177 &target_pr_attr_res_type, 2178 &target_pr_attr_res_aptpl_active, 2179 &target_pr_attr_res_aptpl_metadata, 2180 NULL, 2181 }; 2182 2183 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs); 2184 2185 /* End functions for struct config_item_type tb_dev_pr_cit */ 2186 2187 /* Start functions for struct config_item_type tb_dev_cit */ 2188 2189 static inline struct se_device *to_device(struct config_item *item) 2190 { 2191 return container_of(to_config_group(item), struct se_device, dev_group); 2192 } 2193 2194 static ssize_t target_dev_info_show(struct config_item *item, char *page) 2195 { 2196 struct se_device *dev = to_device(item); 2197 int bl = 0; 2198 ssize_t read_bytes = 0; 2199 2200 transport_dump_dev_state(dev, page, &bl); 2201 read_bytes += bl; 2202 read_bytes += dev->transport->show_configfs_dev_params(dev, 2203 page+read_bytes); 2204 return read_bytes; 2205 } 2206 2207 static ssize_t target_dev_control_store(struct config_item *item, 2208 const char *page, size_t count) 2209 { 2210 struct se_device *dev = to_device(item); 2211 2212 return dev->transport->set_configfs_dev_params(dev, page, count); 2213 } 2214 2215 static ssize_t target_dev_alias_show(struct config_item *item, char *page) 2216 { 2217 struct se_device *dev = to_device(item); 2218 2219 if (!(dev->dev_flags & DF_USING_ALIAS)) 2220 return 0; 2221 2222 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); 2223 } 2224 2225 static ssize_t target_dev_alias_store(struct config_item *item, 2226 const char *page, size_t count) 2227 { 2228 struct se_device *dev = to_device(item); 2229 struct se_hba *hba = dev->se_hba; 2230 ssize_t read_bytes; 2231 2232 if (count > (SE_DEV_ALIAS_LEN-1)) { 2233 pr_err("alias count: %d exceeds" 2234 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 2235 SE_DEV_ALIAS_LEN-1); 2236 return -EINVAL; 2237 } 2238 2239 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); 2240 if (!read_bytes) 2241 return -EINVAL; 2242 if (dev->dev_alias[read_bytes - 1] == '\n') 2243 dev->dev_alias[read_bytes - 1] = '\0'; 2244 2245 dev->dev_flags |= DF_USING_ALIAS; 2246 2247 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 2248 config_item_name(&hba->hba_group.cg_item), 2249 config_item_name(&dev->dev_group.cg_item), 2250 dev->dev_alias); 2251 2252 return read_bytes; 2253 } 2254 2255 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page) 2256 { 2257 struct se_device *dev = to_device(item); 2258 2259 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) 2260 return 0; 2261 2262 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); 2263 } 2264 2265 static ssize_t target_dev_udev_path_store(struct config_item *item, 2266 const char *page, size_t count) 2267 { 2268 struct se_device *dev = to_device(item); 2269 struct se_hba *hba = dev->se_hba; 2270 ssize_t read_bytes; 2271 2272 if (count > (SE_UDEV_PATH_LEN-1)) { 2273 pr_err("udev_path count: %d exceeds" 2274 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 2275 SE_UDEV_PATH_LEN-1); 2276 return -EINVAL; 2277 } 2278 2279 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, 2280 "%s", page); 2281 if (!read_bytes) 2282 return -EINVAL; 2283 if (dev->udev_path[read_bytes - 1] == '\n') 2284 dev->udev_path[read_bytes - 1] = '\0'; 2285 2286 dev->dev_flags |= DF_USING_UDEV_PATH; 2287 2288 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 2289 config_item_name(&hba->hba_group.cg_item), 2290 config_item_name(&dev->dev_group.cg_item), 2291 dev->udev_path); 2292 2293 return read_bytes; 2294 } 2295 2296 static ssize_t target_dev_enable_show(struct config_item *item, char *page) 2297 { 2298 struct se_device *dev = to_device(item); 2299 2300 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev)); 2301 } 2302 2303 static ssize_t target_dev_enable_store(struct config_item *item, 2304 const char *page, size_t count) 2305 { 2306 struct se_device *dev = to_device(item); 2307 char *ptr; 2308 int ret; 2309 2310 ptr = strstr(page, "1"); 2311 if (!ptr) { 2312 pr_err("For dev_enable ops, only valid value" 2313 " is \"1\"\n"); 2314 return -EINVAL; 2315 } 2316 2317 ret = target_configure_device(dev); 2318 if (ret) 2319 return ret; 2320 return count; 2321 } 2322 2323 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page) 2324 { 2325 struct se_device *dev = to_device(item); 2326 struct config_item *lu_ci; 2327 struct t10_alua_lu_gp *lu_gp; 2328 struct t10_alua_lu_gp_member *lu_gp_mem; 2329 ssize_t len = 0; 2330 2331 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2332 if (!lu_gp_mem) 2333 return 0; 2334 2335 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2336 lu_gp = lu_gp_mem->lu_gp; 2337 if (lu_gp) { 2338 lu_ci = &lu_gp->lu_gp_group.cg_item; 2339 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 2340 config_item_name(lu_ci), lu_gp->lu_gp_id); 2341 } 2342 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2343 2344 return len; 2345 } 2346 2347 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item, 2348 const char *page, size_t count) 2349 { 2350 struct se_device *dev = to_device(item); 2351 struct se_hba *hba = dev->se_hba; 2352 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 2353 struct t10_alua_lu_gp_member *lu_gp_mem; 2354 unsigned char buf[LU_GROUP_NAME_BUF] = { }; 2355 int move = 0; 2356 2357 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2358 if (!lu_gp_mem) 2359 return count; 2360 2361 if (count > LU_GROUP_NAME_BUF) { 2362 pr_err("ALUA LU Group Alias too large!\n"); 2363 return -EINVAL; 2364 } 2365 memcpy(buf, page, count); 2366 /* 2367 * Any ALUA logical unit alias besides "NULL" means we will be 2368 * making a new group association. 2369 */ 2370 if (strcmp(strstrip(buf), "NULL")) { 2371 /* 2372 * core_alua_get_lu_gp_by_name() will increment reference to 2373 * struct t10_alua_lu_gp. This reference is released with 2374 * core_alua_get_lu_gp_by_name below(). 2375 */ 2376 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 2377 if (!lu_gp_new) 2378 return -ENODEV; 2379 } 2380 2381 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2382 lu_gp = lu_gp_mem->lu_gp; 2383 if (lu_gp) { 2384 /* 2385 * Clearing an existing lu_gp association, and replacing 2386 * with NULL 2387 */ 2388 if (!lu_gp_new) { 2389 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 2390 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 2391 " %hu\n", 2392 config_item_name(&hba->hba_group.cg_item), 2393 config_item_name(&dev->dev_group.cg_item), 2394 config_item_name(&lu_gp->lu_gp_group.cg_item), 2395 lu_gp->lu_gp_id); 2396 2397 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2398 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2399 2400 return count; 2401 } 2402 /* 2403 * Removing existing association of lu_gp_mem with lu_gp 2404 */ 2405 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2406 move = 1; 2407 } 2408 /* 2409 * Associate lu_gp_mem with lu_gp_new. 2410 */ 2411 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 2412 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2413 2414 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 2415 " core/alua/lu_gps/%s, ID: %hu\n", 2416 (move) ? "Moving" : "Adding", 2417 config_item_name(&hba->hba_group.cg_item), 2418 config_item_name(&dev->dev_group.cg_item), 2419 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 2420 lu_gp_new->lu_gp_id); 2421 2422 core_alua_put_lu_gp_from_name(lu_gp_new); 2423 return count; 2424 } 2425 2426 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page) 2427 { 2428 struct se_device *dev = to_device(item); 2429 struct t10_alua_lba_map *map; 2430 struct t10_alua_lba_map_member *mem; 2431 char *b = page; 2432 int bl = 0; 2433 char state; 2434 2435 spin_lock(&dev->t10_alua.lba_map_lock); 2436 if (!list_empty(&dev->t10_alua.lba_map_list)) 2437 bl += sprintf(b + bl, "%u %u\n", 2438 dev->t10_alua.lba_map_segment_size, 2439 dev->t10_alua.lba_map_segment_multiplier); 2440 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) { 2441 bl += sprintf(b + bl, "%llu %llu", 2442 map->lba_map_first_lba, map->lba_map_last_lba); 2443 list_for_each_entry(mem, &map->lba_map_mem_list, 2444 lba_map_mem_list) { 2445 switch (mem->lba_map_mem_alua_state) { 2446 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: 2447 state = 'O'; 2448 break; 2449 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: 2450 state = 'A'; 2451 break; 2452 case ALUA_ACCESS_STATE_STANDBY: 2453 state = 'S'; 2454 break; 2455 case ALUA_ACCESS_STATE_UNAVAILABLE: 2456 state = 'U'; 2457 break; 2458 default: 2459 state = '.'; 2460 break; 2461 } 2462 bl += sprintf(b + bl, " %d:%c", 2463 mem->lba_map_mem_alua_pg_id, state); 2464 } 2465 bl += sprintf(b + bl, "\n"); 2466 } 2467 spin_unlock(&dev->t10_alua.lba_map_lock); 2468 return bl; 2469 } 2470 2471 static ssize_t target_dev_lba_map_store(struct config_item *item, 2472 const char *page, size_t count) 2473 { 2474 struct se_device *dev = to_device(item); 2475 struct t10_alua_lba_map *lba_map = NULL; 2476 struct list_head lba_list; 2477 char *map_entries, *orig, *ptr; 2478 char state; 2479 int pg_num = -1, pg; 2480 int ret = 0, num = 0, pg_id, alua_state; 2481 unsigned long start_lba = -1, end_lba = -1; 2482 unsigned long segment_size = -1, segment_mult = -1; 2483 2484 orig = map_entries = kstrdup(page, GFP_KERNEL); 2485 if (!map_entries) 2486 return -ENOMEM; 2487 2488 INIT_LIST_HEAD(&lba_list); 2489 while ((ptr = strsep(&map_entries, "\n")) != NULL) { 2490 if (!*ptr) 2491 continue; 2492 2493 if (num == 0) { 2494 if (sscanf(ptr, "%lu %lu\n", 2495 &segment_size, &segment_mult) != 2) { 2496 pr_err("Invalid line %d\n", num); 2497 ret = -EINVAL; 2498 break; 2499 } 2500 num++; 2501 continue; 2502 } 2503 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) { 2504 pr_err("Invalid line %d\n", num); 2505 ret = -EINVAL; 2506 break; 2507 } 2508 ptr = strchr(ptr, ' '); 2509 if (!ptr) { 2510 pr_err("Invalid line %d, missing end lba\n", num); 2511 ret = -EINVAL; 2512 break; 2513 } 2514 ptr++; 2515 ptr = strchr(ptr, ' '); 2516 if (!ptr) { 2517 pr_err("Invalid line %d, missing state definitions\n", 2518 num); 2519 ret = -EINVAL; 2520 break; 2521 } 2522 ptr++; 2523 lba_map = core_alua_allocate_lba_map(&lba_list, 2524 start_lba, end_lba); 2525 if (IS_ERR(lba_map)) { 2526 ret = PTR_ERR(lba_map); 2527 break; 2528 } 2529 pg = 0; 2530 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) { 2531 switch (state) { 2532 case 'O': 2533 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED; 2534 break; 2535 case 'A': 2536 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED; 2537 break; 2538 case 'S': 2539 alua_state = ALUA_ACCESS_STATE_STANDBY; 2540 break; 2541 case 'U': 2542 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE; 2543 break; 2544 default: 2545 pr_err("Invalid ALUA state '%c'\n", state); 2546 ret = -EINVAL; 2547 goto out; 2548 } 2549 2550 ret = core_alua_allocate_lba_map_mem(lba_map, 2551 pg_id, alua_state); 2552 if (ret) { 2553 pr_err("Invalid target descriptor %d:%c " 2554 "at line %d\n", 2555 pg_id, state, num); 2556 break; 2557 } 2558 pg++; 2559 ptr = strchr(ptr, ' '); 2560 if (ptr) 2561 ptr++; 2562 else 2563 break; 2564 } 2565 if (pg_num == -1) 2566 pg_num = pg; 2567 else if (pg != pg_num) { 2568 pr_err("Only %d from %d port groups definitions " 2569 "at line %d\n", pg, pg_num, num); 2570 ret = -EINVAL; 2571 break; 2572 } 2573 num++; 2574 } 2575 out: 2576 if (ret) { 2577 core_alua_free_lba_map(&lba_list); 2578 count = ret; 2579 } else 2580 core_alua_set_lba_map(dev, &lba_list, 2581 segment_size, segment_mult); 2582 kfree(orig); 2583 return count; 2584 } 2585 2586 CONFIGFS_ATTR_RO(target_dev_, info); 2587 CONFIGFS_ATTR_WO(target_dev_, control); 2588 CONFIGFS_ATTR(target_dev_, alias); 2589 CONFIGFS_ATTR(target_dev_, udev_path); 2590 CONFIGFS_ATTR(target_dev_, enable); 2591 CONFIGFS_ATTR(target_dev_, alua_lu_gp); 2592 CONFIGFS_ATTR(target_dev_, lba_map); 2593 2594 static struct configfs_attribute *target_core_dev_attrs[] = { 2595 &target_dev_attr_info, 2596 &target_dev_attr_control, 2597 &target_dev_attr_alias, 2598 &target_dev_attr_udev_path, 2599 &target_dev_attr_enable, 2600 &target_dev_attr_alua_lu_gp, 2601 &target_dev_attr_lba_map, 2602 NULL, 2603 }; 2604 2605 static void target_core_dev_release(struct config_item *item) 2606 { 2607 struct config_group *dev_cg = to_config_group(item); 2608 struct se_device *dev = 2609 container_of(dev_cg, struct se_device, dev_group); 2610 2611 target_free_device(dev); 2612 } 2613 2614 /* 2615 * Used in target_core_fabric_configfs.c to verify valid se_device symlink 2616 * within target_fabric_port_link() 2617 */ 2618 struct configfs_item_operations target_core_dev_item_ops = { 2619 .release = target_core_dev_release, 2620 }; 2621 2622 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs); 2623 2624 /* End functions for struct config_item_type tb_dev_cit */ 2625 2626 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 2627 2628 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item) 2629 { 2630 return container_of(to_config_group(item), struct t10_alua_lu_gp, 2631 lu_gp_group); 2632 } 2633 2634 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page) 2635 { 2636 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2637 2638 if (!lu_gp->lu_gp_valid_id) 2639 return 0; 2640 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2641 } 2642 2643 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item, 2644 const char *page, size_t count) 2645 { 2646 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2647 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2648 unsigned long lu_gp_id; 2649 int ret; 2650 2651 ret = kstrtoul(page, 0, &lu_gp_id); 2652 if (ret < 0) { 2653 pr_err("kstrtoul() returned %d for" 2654 " lu_gp_id\n", ret); 2655 return ret; 2656 } 2657 if (lu_gp_id > 0x0000ffff) { 2658 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 2659 " 0x0000ffff\n", lu_gp_id); 2660 return -EINVAL; 2661 } 2662 2663 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2664 if (ret < 0) 2665 return -EINVAL; 2666 2667 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 2668 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2669 config_item_name(&alua_lu_gp_cg->cg_item), 2670 lu_gp->lu_gp_id); 2671 2672 return count; 2673 } 2674 2675 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page) 2676 { 2677 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2678 struct se_device *dev; 2679 struct se_hba *hba; 2680 struct t10_alua_lu_gp_member *lu_gp_mem; 2681 ssize_t len = 0, cur_len; 2682 unsigned char buf[LU_GROUP_NAME_BUF] = { }; 2683 2684 spin_lock(&lu_gp->lu_gp_lock); 2685 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2686 dev = lu_gp_mem->lu_gp_mem_dev; 2687 hba = dev->se_hba; 2688 2689 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 2690 config_item_name(&hba->hba_group.cg_item), 2691 config_item_name(&dev->dev_group.cg_item)); 2692 cur_len++; /* Extra byte for NULL terminator */ 2693 2694 if ((cur_len + len) > PAGE_SIZE) { 2695 pr_warn("Ran out of lu_gp_show_attr" 2696 "_members buffer\n"); 2697 break; 2698 } 2699 memcpy(page+len, buf, cur_len); 2700 len += cur_len; 2701 } 2702 spin_unlock(&lu_gp->lu_gp_lock); 2703 2704 return len; 2705 } 2706 2707 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id); 2708 CONFIGFS_ATTR_RO(target_lu_gp_, members); 2709 2710 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2711 &target_lu_gp_attr_lu_gp_id, 2712 &target_lu_gp_attr_members, 2713 NULL, 2714 }; 2715 2716 static void target_core_alua_lu_gp_release(struct config_item *item) 2717 { 2718 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2719 struct t10_alua_lu_gp, lu_gp_group); 2720 2721 core_alua_free_lu_gp(lu_gp); 2722 } 2723 2724 static struct configfs_item_operations target_core_alua_lu_gp_ops = { 2725 .release = target_core_alua_lu_gp_release, 2726 }; 2727 2728 static const struct config_item_type target_core_alua_lu_gp_cit = { 2729 .ct_item_ops = &target_core_alua_lu_gp_ops, 2730 .ct_attrs = target_core_alua_lu_gp_attrs, 2731 .ct_owner = THIS_MODULE, 2732 }; 2733 2734 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2735 2736 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2737 2738 static struct config_group *target_core_alua_create_lu_gp( 2739 struct config_group *group, 2740 const char *name) 2741 { 2742 struct t10_alua_lu_gp *lu_gp; 2743 struct config_group *alua_lu_gp_cg = NULL; 2744 struct config_item *alua_lu_gp_ci = NULL; 2745 2746 lu_gp = core_alua_allocate_lu_gp(name, 0); 2747 if (IS_ERR(lu_gp)) 2748 return NULL; 2749 2750 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2751 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2752 2753 config_group_init_type_name(alua_lu_gp_cg, name, 2754 &target_core_alua_lu_gp_cit); 2755 2756 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2757 " Group: core/alua/lu_gps/%s\n", 2758 config_item_name(alua_lu_gp_ci)); 2759 2760 return alua_lu_gp_cg; 2761 2762 } 2763 2764 static void target_core_alua_drop_lu_gp( 2765 struct config_group *group, 2766 struct config_item *item) 2767 { 2768 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2769 struct t10_alua_lu_gp, lu_gp_group); 2770 2771 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2772 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2773 config_item_name(item), lu_gp->lu_gp_id); 2774 /* 2775 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 2776 * -> target_core_alua_lu_gp_release() 2777 */ 2778 config_item_put(item); 2779 } 2780 2781 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2782 .make_group = &target_core_alua_create_lu_gp, 2783 .drop_item = &target_core_alua_drop_lu_gp, 2784 }; 2785 2786 static const struct config_item_type target_core_alua_lu_gps_cit = { 2787 .ct_item_ops = NULL, 2788 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2789 .ct_owner = THIS_MODULE, 2790 }; 2791 2792 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2793 2794 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2795 2796 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item) 2797 { 2798 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp, 2799 tg_pt_gp_group); 2800 } 2801 2802 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item, 2803 char *page) 2804 { 2805 return sprintf(page, "%d\n", 2806 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state); 2807 } 2808 2809 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item, 2810 const char *page, size_t count) 2811 { 2812 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2813 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; 2814 unsigned long tmp; 2815 int new_state, ret; 2816 2817 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2818 pr_err("Unable to do implicit ALUA on invalid tg_pt_gp ID\n"); 2819 return -EINVAL; 2820 } 2821 if (!target_dev_configured(dev)) { 2822 pr_err("Unable to set alua_access_state while device is" 2823 " not configured\n"); 2824 return -ENODEV; 2825 } 2826 2827 ret = kstrtoul(page, 0, &tmp); 2828 if (ret < 0) { 2829 pr_err("Unable to extract new ALUA access state from" 2830 " %s\n", page); 2831 return ret; 2832 } 2833 new_state = (int)tmp; 2834 2835 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) { 2836 pr_err("Unable to process implicit configfs ALUA" 2837 " transition while TPGS_IMPLICIT_ALUA is disabled\n"); 2838 return -EINVAL; 2839 } 2840 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA && 2841 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) { 2842 /* LBA DEPENDENT is only allowed with implicit ALUA */ 2843 pr_err("Unable to process implicit configfs ALUA transition" 2844 " while explicit ALUA management is enabled\n"); 2845 return -EINVAL; 2846 } 2847 2848 ret = core_alua_do_port_transition(tg_pt_gp, dev, 2849 NULL, NULL, new_state, 0); 2850 return (!ret) ? count : -EINVAL; 2851 } 2852 2853 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item, 2854 char *page) 2855 { 2856 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2857 return sprintf(page, "%s\n", 2858 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2859 } 2860 2861 static ssize_t target_tg_pt_gp_alua_access_status_store( 2862 struct config_item *item, const char *page, size_t count) 2863 { 2864 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2865 unsigned long tmp; 2866 int new_status, ret; 2867 2868 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2869 pr_err("Unable to set ALUA access status on invalid tg_pt_gp ID\n"); 2870 return -EINVAL; 2871 } 2872 2873 ret = kstrtoul(page, 0, &tmp); 2874 if (ret < 0) { 2875 pr_err("Unable to extract new ALUA access status" 2876 " from %s\n", page); 2877 return ret; 2878 } 2879 new_status = (int)tmp; 2880 2881 if ((new_status != ALUA_STATUS_NONE) && 2882 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && 2883 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { 2884 pr_err("Illegal ALUA access status: 0x%02x\n", 2885 new_status); 2886 return -EINVAL; 2887 } 2888 2889 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2890 return count; 2891 } 2892 2893 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item, 2894 char *page) 2895 { 2896 return core_alua_show_access_type(to_tg_pt_gp(item), page); 2897 } 2898 2899 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item, 2900 const char *page, size_t count) 2901 { 2902 return core_alua_store_access_type(to_tg_pt_gp(item), page, count); 2903 } 2904 2905 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \ 2906 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \ 2907 struct config_item *item, char *p) \ 2908 { \ 2909 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 2910 return sprintf(p, "%d\n", \ 2911 !!(t->tg_pt_gp_alua_supported_states & _bit)); \ 2912 } \ 2913 \ 2914 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \ 2915 struct config_item *item, const char *p, size_t c) \ 2916 { \ 2917 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 2918 unsigned long tmp; \ 2919 int ret; \ 2920 \ 2921 if (!t->tg_pt_gp_valid_id) { \ 2922 pr_err("Unable to set " #_name " ALUA state on invalid tg_pt_gp ID\n"); \ 2923 return -EINVAL; \ 2924 } \ 2925 \ 2926 ret = kstrtoul(p, 0, &tmp); \ 2927 if (ret < 0) { \ 2928 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \ 2929 return -EINVAL; \ 2930 } \ 2931 if (tmp > 1) { \ 2932 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \ 2933 return -EINVAL; \ 2934 } \ 2935 if (tmp) \ 2936 t->tg_pt_gp_alua_supported_states |= _bit; \ 2937 else \ 2938 t->tg_pt_gp_alua_supported_states &= ~_bit; \ 2939 \ 2940 return c; \ 2941 } 2942 2943 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP); 2944 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP); 2945 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP); 2946 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP); 2947 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP); 2948 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP); 2949 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP); 2950 2951 static ssize_t target_tg_pt_gp_alua_write_metadata_show( 2952 struct config_item *item, char *page) 2953 { 2954 return sprintf(page, "%d\n", 2955 to_tg_pt_gp(item)->tg_pt_gp_write_metadata); 2956 } 2957 2958 static ssize_t target_tg_pt_gp_alua_write_metadata_store( 2959 struct config_item *item, const char *page, size_t count) 2960 { 2961 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2962 unsigned long tmp; 2963 int ret; 2964 2965 ret = kstrtoul(page, 0, &tmp); 2966 if (ret < 0) { 2967 pr_err("Unable to extract alua_write_metadata\n"); 2968 return ret; 2969 } 2970 2971 if ((tmp != 0) && (tmp != 1)) { 2972 pr_err("Illegal value for alua_write_metadata:" 2973 " %lu\n", tmp); 2974 return -EINVAL; 2975 } 2976 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 2977 2978 return count; 2979 } 2980 2981 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item, 2982 char *page) 2983 { 2984 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page); 2985 } 2986 2987 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item, 2988 const char *page, size_t count) 2989 { 2990 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page, 2991 count); 2992 } 2993 2994 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item, 2995 char *page) 2996 { 2997 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page); 2998 } 2999 3000 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item, 3001 const char *page, size_t count) 3002 { 3003 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page, 3004 count); 3005 } 3006 3007 static ssize_t target_tg_pt_gp_implicit_trans_secs_show( 3008 struct config_item *item, char *page) 3009 { 3010 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page); 3011 } 3012 3013 static ssize_t target_tg_pt_gp_implicit_trans_secs_store( 3014 struct config_item *item, const char *page, size_t count) 3015 { 3016 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page, 3017 count); 3018 } 3019 3020 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item, 3021 char *page) 3022 { 3023 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page); 3024 } 3025 3026 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item, 3027 const char *page, size_t count) 3028 { 3029 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count); 3030 } 3031 3032 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item, 3033 char *page) 3034 { 3035 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3036 3037 if (!tg_pt_gp->tg_pt_gp_valid_id) 3038 return 0; 3039 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 3040 } 3041 3042 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item, 3043 const char *page, size_t count) 3044 { 3045 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3046 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 3047 unsigned long tg_pt_gp_id; 3048 int ret; 3049 3050 ret = kstrtoul(page, 0, &tg_pt_gp_id); 3051 if (ret < 0) { 3052 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n", 3053 page); 3054 return ret; 3055 } 3056 if (tg_pt_gp_id > 0x0000ffff) { 3057 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n", 3058 tg_pt_gp_id); 3059 return -EINVAL; 3060 } 3061 3062 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 3063 if (ret < 0) 3064 return -EINVAL; 3065 3066 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 3067 "core/alua/tg_pt_gps/%s to ID: %hu\n", 3068 config_item_name(&alua_tg_pt_gp_cg->cg_item), 3069 tg_pt_gp->tg_pt_gp_id); 3070 3071 return count; 3072 } 3073 3074 static ssize_t target_tg_pt_gp_members_show(struct config_item *item, 3075 char *page) 3076 { 3077 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3078 struct se_lun *lun; 3079 ssize_t len = 0, cur_len; 3080 unsigned char buf[TG_PT_GROUP_NAME_BUF] = { }; 3081 3082 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 3083 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, 3084 lun_tg_pt_gp_link) { 3085 struct se_portal_group *tpg = lun->lun_tpg; 3086 3087 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 3088 "/%s\n", tpg->se_tpg_tfo->fabric_name, 3089 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 3090 tpg->se_tpg_tfo->tpg_get_tag(tpg), 3091 config_item_name(&lun->lun_group.cg_item)); 3092 cur_len++; /* Extra byte for NULL terminator */ 3093 3094 if ((cur_len + len) > PAGE_SIZE) { 3095 pr_warn("Ran out of lu_gp_show_attr" 3096 "_members buffer\n"); 3097 break; 3098 } 3099 memcpy(page+len, buf, cur_len); 3100 len += cur_len; 3101 } 3102 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 3103 3104 return len; 3105 } 3106 3107 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state); 3108 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status); 3109 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type); 3110 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning); 3111 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline); 3112 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent); 3113 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable); 3114 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby); 3115 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized); 3116 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized); 3117 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata); 3118 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs); 3119 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs); 3120 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs); 3121 CONFIGFS_ATTR(target_tg_pt_gp_, preferred); 3122 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id); 3123 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members); 3124 3125 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 3126 &target_tg_pt_gp_attr_alua_access_state, 3127 &target_tg_pt_gp_attr_alua_access_status, 3128 &target_tg_pt_gp_attr_alua_access_type, 3129 &target_tg_pt_gp_attr_alua_support_transitioning, 3130 &target_tg_pt_gp_attr_alua_support_offline, 3131 &target_tg_pt_gp_attr_alua_support_lba_dependent, 3132 &target_tg_pt_gp_attr_alua_support_unavailable, 3133 &target_tg_pt_gp_attr_alua_support_standby, 3134 &target_tg_pt_gp_attr_alua_support_active_nonoptimized, 3135 &target_tg_pt_gp_attr_alua_support_active_optimized, 3136 &target_tg_pt_gp_attr_alua_write_metadata, 3137 &target_tg_pt_gp_attr_nonop_delay_msecs, 3138 &target_tg_pt_gp_attr_trans_delay_msecs, 3139 &target_tg_pt_gp_attr_implicit_trans_secs, 3140 &target_tg_pt_gp_attr_preferred, 3141 &target_tg_pt_gp_attr_tg_pt_gp_id, 3142 &target_tg_pt_gp_attr_members, 3143 NULL, 3144 }; 3145 3146 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 3147 { 3148 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3149 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3150 3151 core_alua_free_tg_pt_gp(tg_pt_gp); 3152 } 3153 3154 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 3155 .release = target_core_alua_tg_pt_gp_release, 3156 }; 3157 3158 static const struct config_item_type target_core_alua_tg_pt_gp_cit = { 3159 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 3160 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 3161 .ct_owner = THIS_MODULE, 3162 }; 3163 3164 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 3165 3166 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3167 3168 static struct config_group *target_core_alua_create_tg_pt_gp( 3169 struct config_group *group, 3170 const char *name) 3171 { 3172 struct t10_alua *alua = container_of(group, struct t10_alua, 3173 alua_tg_pt_gps_group); 3174 struct t10_alua_tg_pt_gp *tg_pt_gp; 3175 struct config_group *alua_tg_pt_gp_cg = NULL; 3176 struct config_item *alua_tg_pt_gp_ci = NULL; 3177 3178 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0); 3179 if (!tg_pt_gp) 3180 return NULL; 3181 3182 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 3183 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 3184 3185 config_group_init_type_name(alua_tg_pt_gp_cg, name, 3186 &target_core_alua_tg_pt_gp_cit); 3187 3188 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 3189 " Group: alua/tg_pt_gps/%s\n", 3190 config_item_name(alua_tg_pt_gp_ci)); 3191 3192 return alua_tg_pt_gp_cg; 3193 } 3194 3195 static void target_core_alua_drop_tg_pt_gp( 3196 struct config_group *group, 3197 struct config_item *item) 3198 { 3199 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3200 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3201 3202 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 3203 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 3204 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 3205 /* 3206 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 3207 * -> target_core_alua_tg_pt_gp_release(). 3208 */ 3209 config_item_put(item); 3210 } 3211 3212 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 3213 .make_group = &target_core_alua_create_tg_pt_gp, 3214 .drop_item = &target_core_alua_drop_tg_pt_gp, 3215 }; 3216 3217 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL); 3218 3219 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3220 3221 /* Start functions for struct config_item_type target_core_alua_cit */ 3222 3223 /* 3224 * target_core_alua_cit is a ConfigFS group that lives under 3225 * /sys/kernel/config/target/core/alua. There are default groups 3226 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 3227 * target_core_alua_cit in target_core_init_configfs() below. 3228 */ 3229 static const struct config_item_type target_core_alua_cit = { 3230 .ct_item_ops = NULL, 3231 .ct_attrs = NULL, 3232 .ct_owner = THIS_MODULE, 3233 }; 3234 3235 /* End functions for struct config_item_type target_core_alua_cit */ 3236 3237 /* Start functions for struct config_item_type tb_dev_stat_cit */ 3238 3239 static struct config_group *target_core_stat_mkdir( 3240 struct config_group *group, 3241 const char *name) 3242 { 3243 return ERR_PTR(-ENOSYS); 3244 } 3245 3246 static void target_core_stat_rmdir( 3247 struct config_group *group, 3248 struct config_item *item) 3249 { 3250 return; 3251 } 3252 3253 static struct configfs_group_operations target_core_stat_group_ops = { 3254 .make_group = &target_core_stat_mkdir, 3255 .drop_item = &target_core_stat_rmdir, 3256 }; 3257 3258 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL); 3259 3260 /* End functions for struct config_item_type tb_dev_stat_cit */ 3261 3262 /* Start functions for struct config_item_type target_core_hba_cit */ 3263 3264 static struct config_group *target_core_make_subdev( 3265 struct config_group *group, 3266 const char *name) 3267 { 3268 struct t10_alua_tg_pt_gp *tg_pt_gp; 3269 struct config_item *hba_ci = &group->cg_item; 3270 struct se_hba *hba = item_to_hba(hba_ci); 3271 struct target_backend *tb = hba->backend; 3272 struct se_device *dev; 3273 int errno = -ENOMEM, ret; 3274 3275 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 3276 if (ret) 3277 return ERR_PTR(ret); 3278 3279 dev = target_alloc_device(hba, name); 3280 if (!dev) 3281 goto out_unlock; 3282 3283 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit); 3284 3285 config_group_init_type_name(&dev->dev_action_group, "action", 3286 &tb->tb_dev_action_cit); 3287 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group); 3288 3289 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib", 3290 &tb->tb_dev_attrib_cit); 3291 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group); 3292 3293 config_group_init_type_name(&dev->dev_pr_group, "pr", 3294 &tb->tb_dev_pr_cit); 3295 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group); 3296 3297 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn", 3298 &tb->tb_dev_wwn_cit); 3299 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group, 3300 &dev->dev_group); 3301 3302 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group, 3303 "alua", &tb->tb_dev_alua_tg_pt_gps_cit); 3304 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group, 3305 &dev->dev_group); 3306 3307 config_group_init_type_name(&dev->dev_stat_grps.stat_group, 3308 "statistics", &tb->tb_dev_stat_cit); 3309 configfs_add_default_group(&dev->dev_stat_grps.stat_group, 3310 &dev->dev_group); 3311 3312 /* 3313 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 3314 */ 3315 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1); 3316 if (!tg_pt_gp) 3317 goto out_free_device; 3318 dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 3319 3320 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 3321 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 3322 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group, 3323 &dev->t10_alua.alua_tg_pt_gps_group); 3324 3325 /* 3326 * Add core/$HBA/$DEV/statistics/ default groups 3327 */ 3328 target_stat_setup_dev_default_groups(dev); 3329 3330 mutex_lock(&target_devices_lock); 3331 target_devices++; 3332 mutex_unlock(&target_devices_lock); 3333 3334 mutex_unlock(&hba->hba_access_mutex); 3335 return &dev->dev_group; 3336 3337 out_free_device: 3338 target_free_device(dev); 3339 out_unlock: 3340 mutex_unlock(&hba->hba_access_mutex); 3341 return ERR_PTR(errno); 3342 } 3343 3344 static void target_core_drop_subdev( 3345 struct config_group *group, 3346 struct config_item *item) 3347 { 3348 struct config_group *dev_cg = to_config_group(item); 3349 struct se_device *dev = 3350 container_of(dev_cg, struct se_device, dev_group); 3351 struct se_hba *hba; 3352 3353 hba = item_to_hba(&dev->se_hba->hba_group.cg_item); 3354 3355 mutex_lock(&hba->hba_access_mutex); 3356 3357 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group); 3358 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group); 3359 3360 /* 3361 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 3362 * directly from target_core_alua_tg_pt_gp_release(). 3363 */ 3364 dev->t10_alua.default_tg_pt_gp = NULL; 3365 3366 configfs_remove_default_groups(dev_cg); 3367 3368 /* 3369 * se_dev is released from target_core_dev_item_ops->release() 3370 */ 3371 config_item_put(item); 3372 3373 mutex_lock(&target_devices_lock); 3374 target_devices--; 3375 mutex_unlock(&target_devices_lock); 3376 3377 mutex_unlock(&hba->hba_access_mutex); 3378 } 3379 3380 static struct configfs_group_operations target_core_hba_group_ops = { 3381 .make_group = target_core_make_subdev, 3382 .drop_item = target_core_drop_subdev, 3383 }; 3384 3385 3386 static inline struct se_hba *to_hba(struct config_item *item) 3387 { 3388 return container_of(to_config_group(item), struct se_hba, hba_group); 3389 } 3390 3391 static ssize_t target_hba_info_show(struct config_item *item, char *page) 3392 { 3393 struct se_hba *hba = to_hba(item); 3394 3395 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 3396 hba->hba_id, hba->backend->ops->name, 3397 TARGET_CORE_VERSION); 3398 } 3399 3400 static ssize_t target_hba_mode_show(struct config_item *item, char *page) 3401 { 3402 struct se_hba *hba = to_hba(item); 3403 int hba_mode = 0; 3404 3405 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 3406 hba_mode = 1; 3407 3408 return sprintf(page, "%d\n", hba_mode); 3409 } 3410 3411 static ssize_t target_hba_mode_store(struct config_item *item, 3412 const char *page, size_t count) 3413 { 3414 struct se_hba *hba = to_hba(item); 3415 unsigned long mode_flag; 3416 int ret; 3417 3418 if (hba->backend->ops->pmode_enable_hba == NULL) 3419 return -EINVAL; 3420 3421 ret = kstrtoul(page, 0, &mode_flag); 3422 if (ret < 0) { 3423 pr_err("Unable to extract hba mode flag: %d\n", ret); 3424 return ret; 3425 } 3426 3427 if (hba->dev_count) { 3428 pr_err("Unable to set hba_mode with active devices\n"); 3429 return -EINVAL; 3430 } 3431 3432 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag); 3433 if (ret < 0) 3434 return -EINVAL; 3435 if (ret > 0) 3436 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 3437 else if (ret == 0) 3438 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 3439 3440 return count; 3441 } 3442 3443 CONFIGFS_ATTR_RO(target_, hba_info); 3444 CONFIGFS_ATTR(target_, hba_mode); 3445 3446 static void target_core_hba_release(struct config_item *item) 3447 { 3448 struct se_hba *hba = container_of(to_config_group(item), 3449 struct se_hba, hba_group); 3450 core_delete_hba(hba); 3451 } 3452 3453 static struct configfs_attribute *target_core_hba_attrs[] = { 3454 &target_attr_hba_info, 3455 &target_attr_hba_mode, 3456 NULL, 3457 }; 3458 3459 static struct configfs_item_operations target_core_hba_item_ops = { 3460 .release = target_core_hba_release, 3461 }; 3462 3463 static const struct config_item_type target_core_hba_cit = { 3464 .ct_item_ops = &target_core_hba_item_ops, 3465 .ct_group_ops = &target_core_hba_group_ops, 3466 .ct_attrs = target_core_hba_attrs, 3467 .ct_owner = THIS_MODULE, 3468 }; 3469 3470 static struct config_group *target_core_call_addhbatotarget( 3471 struct config_group *group, 3472 const char *name) 3473 { 3474 char *se_plugin_str, *str, *str2; 3475 struct se_hba *hba; 3476 char buf[TARGET_CORE_NAME_MAX_LEN] = { }; 3477 unsigned long plugin_dep_id = 0; 3478 int ret; 3479 3480 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 3481 pr_err("Passed *name strlen(): %d exceeds" 3482 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 3483 TARGET_CORE_NAME_MAX_LEN); 3484 return ERR_PTR(-ENAMETOOLONG); 3485 } 3486 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 3487 3488 str = strstr(buf, "_"); 3489 if (!str) { 3490 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 3491 return ERR_PTR(-EINVAL); 3492 } 3493 se_plugin_str = buf; 3494 /* 3495 * Special case for subsystem plugins that have "_" in their names. 3496 * Namely rd_direct and rd_mcp.. 3497 */ 3498 str2 = strstr(str+1, "_"); 3499 if (str2) { 3500 *str2 = '\0'; /* Terminate for *se_plugin_str */ 3501 str2++; /* Skip to start of plugin dependent ID */ 3502 str = str2; 3503 } else { 3504 *str = '\0'; /* Terminate for *se_plugin_str */ 3505 str++; /* Skip to start of plugin dependent ID */ 3506 } 3507 3508 ret = kstrtoul(str, 0, &plugin_dep_id); 3509 if (ret < 0) { 3510 pr_err("kstrtoul() returned %d for" 3511 " plugin_dep_id\n", ret); 3512 return ERR_PTR(ret); 3513 } 3514 /* 3515 * Load up TCM subsystem plugins if they have not already been loaded. 3516 */ 3517 transport_subsystem_check_init(); 3518 3519 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 3520 if (IS_ERR(hba)) 3521 return ERR_CAST(hba); 3522 3523 config_group_init_type_name(&hba->hba_group, name, 3524 &target_core_hba_cit); 3525 3526 return &hba->hba_group; 3527 } 3528 3529 static void target_core_call_delhbafromtarget( 3530 struct config_group *group, 3531 struct config_item *item) 3532 { 3533 /* 3534 * core_delete_hba() is called from target_core_hba_item_ops->release() 3535 * -> target_core_hba_release() 3536 */ 3537 config_item_put(item); 3538 } 3539 3540 static struct configfs_group_operations target_core_group_ops = { 3541 .make_group = target_core_call_addhbatotarget, 3542 .drop_item = target_core_call_delhbafromtarget, 3543 }; 3544 3545 static const struct config_item_type target_core_cit = { 3546 .ct_item_ops = NULL, 3547 .ct_group_ops = &target_core_group_ops, 3548 .ct_attrs = NULL, 3549 .ct_owner = THIS_MODULE, 3550 }; 3551 3552 /* Stop functions for struct config_item_type target_core_hba_cit */ 3553 3554 void target_setup_backend_cits(struct target_backend *tb) 3555 { 3556 target_core_setup_dev_cit(tb); 3557 target_core_setup_dev_action_cit(tb); 3558 target_core_setup_dev_attrib_cit(tb); 3559 target_core_setup_dev_pr_cit(tb); 3560 target_core_setup_dev_wwn_cit(tb); 3561 target_core_setup_dev_alua_tg_pt_gps_cit(tb); 3562 target_core_setup_dev_stat_cit(tb); 3563 } 3564 3565 static void target_init_dbroot(void) 3566 { 3567 struct file *fp; 3568 3569 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED); 3570 fp = filp_open(db_root_stage, O_RDONLY, 0); 3571 if (IS_ERR(fp)) { 3572 pr_err("db_root: cannot open: %s\n", db_root_stage); 3573 return; 3574 } 3575 if (!S_ISDIR(file_inode(fp)->i_mode)) { 3576 filp_close(fp, NULL); 3577 pr_err("db_root: not a valid directory: %s\n", db_root_stage); 3578 return; 3579 } 3580 filp_close(fp, NULL); 3581 3582 strncpy(db_root, db_root_stage, DB_ROOT_LEN); 3583 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); 3584 } 3585 3586 static int __init target_core_init_configfs(void) 3587 { 3588 struct configfs_subsystem *subsys = &target_core_fabrics; 3589 struct t10_alua_lu_gp *lu_gp; 3590 int ret; 3591 3592 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 3593 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3594 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3595 3596 config_group_init(&subsys->su_group); 3597 mutex_init(&subsys->su_mutex); 3598 3599 ret = init_se_kmem_caches(); 3600 if (ret < 0) 3601 return ret; 3602 /* 3603 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3604 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3605 */ 3606 config_group_init_type_name(&target_core_hbagroup, "core", 3607 &target_core_cit); 3608 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group); 3609 3610 /* 3611 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3612 */ 3613 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit); 3614 configfs_add_default_group(&alua_group, &target_core_hbagroup); 3615 3616 /* 3617 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3618 * groups under /sys/kernel/config/target/core/alua/ 3619 */ 3620 config_group_init_type_name(&alua_lu_gps_group, "lu_gps", 3621 &target_core_alua_lu_gps_cit); 3622 configfs_add_default_group(&alua_lu_gps_group, &alua_group); 3623 3624 /* 3625 * Add core/alua/lu_gps/default_lu_gp 3626 */ 3627 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3628 if (IS_ERR(lu_gp)) { 3629 ret = -ENOMEM; 3630 goto out_global; 3631 } 3632 3633 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3634 &target_core_alua_lu_gp_cit); 3635 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group); 3636 3637 default_lu_gp = lu_gp; 3638 3639 /* 3640 * Register the target_core_mod subsystem with configfs. 3641 */ 3642 ret = configfs_register_subsystem(subsys); 3643 if (ret < 0) { 3644 pr_err("Error %d while registering subsystem %s\n", 3645 ret, subsys->su_group.cg_item.ci_namebuf); 3646 goto out_global; 3647 } 3648 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 3649 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s" 3650 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3651 /* 3652 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3653 */ 3654 ret = rd_module_init(); 3655 if (ret < 0) 3656 goto out; 3657 3658 ret = core_dev_setup_virtual_lun0(); 3659 if (ret < 0) 3660 goto out; 3661 3662 ret = target_xcopy_setup_pt(); 3663 if (ret < 0) 3664 goto out; 3665 3666 target_init_dbroot(); 3667 3668 return 0; 3669 3670 out: 3671 configfs_unregister_subsystem(subsys); 3672 core_dev_release_virtual_lun0(); 3673 rd_module_exit(); 3674 out_global: 3675 if (default_lu_gp) { 3676 core_alua_free_lu_gp(default_lu_gp); 3677 default_lu_gp = NULL; 3678 } 3679 release_se_kmem_caches(); 3680 return ret; 3681 } 3682 3683 static void __exit target_core_exit_configfs(void) 3684 { 3685 configfs_remove_default_groups(&alua_lu_gps_group); 3686 configfs_remove_default_groups(&alua_group); 3687 configfs_remove_default_groups(&target_core_hbagroup); 3688 3689 /* 3690 * We expect subsys->su_group.default_groups to be released 3691 * by configfs subsystem provider logic.. 3692 */ 3693 configfs_unregister_subsystem(&target_core_fabrics); 3694 3695 core_alua_free_lu_gp(default_lu_gp); 3696 default_lu_gp = NULL; 3697 3698 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3699 " Infrastructure\n"); 3700 3701 core_dev_release_virtual_lun0(); 3702 rd_module_exit(); 3703 target_xcopy_release_pt(); 3704 release_se_kmem_caches(); 3705 } 3706 3707 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3708 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3709 MODULE_LICENSE("GPL"); 3710 3711 module_init(target_core_init_configfs); 3712 module_exit(target_core_exit_configfs); 3713