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/kstrtox.h> 16 #include <linux/module.h> 17 #include <linux/moduleparam.h> 18 #include <generated/utsrelease.h> 19 #include <linux/utsname.h> 20 #include <linux/init.h> 21 #include <linux/fs.h> 22 #include <linux/namei.h> 23 #include <linux/slab.h> 24 #include <linux/types.h> 25 #include <linux/delay.h> 26 #include <linux/unistd.h> 27 #include <linux/string.h> 28 #include <linux/parser.h> 29 #include <linux/syscalls.h> 30 #include <linux/configfs.h> 31 #include <linux/spinlock.h> 32 33 #include <target/target_core_base.h> 34 #include <target/target_core_backend.h> 35 #include <target/target_core_fabric.h> 36 37 #include "target_core_internal.h" 38 #include "target_core_alua.h" 39 #include "target_core_pr.h" 40 #include "target_core_rd.h" 41 #include "target_core_xcopy.h" 42 43 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \ 44 static void target_core_setup_##_name##_cit(struct target_backend *tb) \ 45 { \ 46 struct config_item_type *cit = &tb->tb_##_name##_cit; \ 47 \ 48 cit->ct_item_ops = _item_ops; \ 49 cit->ct_group_ops = _group_ops; \ 50 cit->ct_attrs = _attrs; \ 51 cit->ct_owner = tb->ops->owner; \ 52 pr_debug("Setup generic %s\n", __stringify(_name)); \ 53 } 54 55 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \ 56 static void target_core_setup_##_name##_cit(struct target_backend *tb) \ 57 { \ 58 struct config_item_type *cit = &tb->tb_##_name##_cit; \ 59 \ 60 cit->ct_item_ops = _item_ops; \ 61 cit->ct_group_ops = _group_ops; \ 62 cit->ct_attrs = tb->ops->tb_##_name##_attrs; \ 63 cit->ct_owner = tb->ops->owner; \ 64 pr_debug("Setup generic %s\n", __stringify(_name)); \ 65 } 66 67 extern struct t10_alua_lu_gp *default_lu_gp; 68 69 static LIST_HEAD(g_tf_list); 70 static DEFINE_MUTEX(g_tf_lock); 71 72 static struct config_group target_core_hbagroup; 73 static struct config_group alua_group; 74 static struct config_group alua_lu_gps_group; 75 76 static unsigned int target_devices; 77 static DEFINE_MUTEX(target_devices_lock); 78 79 static inline struct se_hba * 80 item_to_hba(struct config_item *item) 81 { 82 return container_of(to_config_group(item), struct se_hba, hba_group); 83 } 84 85 /* 86 * Attributes for /sys/kernel/config/target/ 87 */ 88 static ssize_t target_core_item_version_show(struct config_item *item, 89 char *page) 90 { 91 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s" 92 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION, 93 utsname()->sysname, utsname()->machine); 94 } 95 96 CONFIGFS_ATTR_RO(target_core_item_, version); 97 98 char db_root[DB_ROOT_LEN] = DB_ROOT_DEFAULT; 99 static char db_root_stage[DB_ROOT_LEN]; 100 101 static ssize_t target_core_item_dbroot_show(struct config_item *item, 102 char *page) 103 { 104 return sprintf(page, "%s\n", db_root); 105 } 106 107 static ssize_t target_core_item_dbroot_store(struct config_item *item, 108 const char *page, size_t count) 109 { 110 ssize_t read_bytes; 111 struct file *fp; 112 ssize_t r = -EINVAL; 113 114 mutex_lock(&target_devices_lock); 115 if (target_devices) { 116 pr_err("db_root: cannot be changed because it's in use\n"); 117 goto unlock; 118 } 119 120 if (count > (DB_ROOT_LEN - 1)) { 121 pr_err("db_root: count %d exceeds DB_ROOT_LEN-1: %u\n", 122 (int)count, DB_ROOT_LEN - 1); 123 goto unlock; 124 } 125 126 read_bytes = snprintf(db_root_stage, DB_ROOT_LEN, "%s", page); 127 if (!read_bytes) 128 goto unlock; 129 130 if (db_root_stage[read_bytes - 1] == '\n') 131 db_root_stage[read_bytes - 1] = '\0'; 132 133 /* validate new db root before accepting it */ 134 fp = filp_open(db_root_stage, O_RDONLY, 0); 135 if (IS_ERR(fp)) { 136 pr_err("db_root: cannot open: %s\n", db_root_stage); 137 goto unlock; 138 } 139 if (!S_ISDIR(file_inode(fp)->i_mode)) { 140 filp_close(fp, NULL); 141 pr_err("db_root: not a directory: %s\n", db_root_stage); 142 goto unlock; 143 } 144 filp_close(fp, NULL); 145 146 strncpy(db_root, db_root_stage, read_bytes); 147 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); 148 149 r = read_bytes; 150 151 unlock: 152 mutex_unlock(&target_devices_lock); 153 return r; 154 } 155 156 CONFIGFS_ATTR(target_core_item_, dbroot); 157 158 static struct target_fabric_configfs *target_core_get_fabric( 159 const char *name) 160 { 161 struct target_fabric_configfs *tf; 162 163 if (!name) 164 return NULL; 165 166 mutex_lock(&g_tf_lock); 167 list_for_each_entry(tf, &g_tf_list, tf_list) { 168 const char *cmp_name = tf->tf_ops->fabric_alias; 169 if (!cmp_name) 170 cmp_name = tf->tf_ops->fabric_name; 171 if (!strcmp(cmp_name, name)) { 172 atomic_inc(&tf->tf_access_cnt); 173 mutex_unlock(&g_tf_lock); 174 return tf; 175 } 176 } 177 mutex_unlock(&g_tf_lock); 178 179 return NULL; 180 } 181 182 /* 183 * Called from struct target_core_group_ops->make_group() 184 */ 185 static struct config_group *target_core_register_fabric( 186 struct config_group *group, 187 const char *name) 188 { 189 struct target_fabric_configfs *tf; 190 int ret; 191 192 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:" 193 " %s\n", group, name); 194 195 tf = target_core_get_fabric(name); 196 if (!tf) { 197 pr_debug("target_core_register_fabric() trying autoload for %s\n", 198 name); 199 200 /* 201 * Below are some hardcoded request_module() calls to automatically 202 * local fabric modules when the following is called: 203 * 204 * mkdir -p /sys/kernel/config/target/$MODULE_NAME 205 * 206 * Note that this does not limit which TCM fabric module can be 207 * registered, but simply provids auto loading logic for modules with 208 * mkdir(2) system calls with known TCM fabric modules. 209 */ 210 211 if (!strncmp(name, "iscsi", 5)) { 212 /* 213 * Automatically load the LIO Target fabric module when the 214 * following is called: 215 * 216 * mkdir -p $CONFIGFS/target/iscsi 217 */ 218 ret = request_module("iscsi_target_mod"); 219 if (ret < 0) { 220 pr_debug("request_module() failed for" 221 " iscsi_target_mod.ko: %d\n", ret); 222 return ERR_PTR(-EINVAL); 223 } 224 } else if (!strncmp(name, "loopback", 8)) { 225 /* 226 * Automatically load the tcm_loop fabric module when the 227 * following is called: 228 * 229 * mkdir -p $CONFIGFS/target/loopback 230 */ 231 ret = request_module("tcm_loop"); 232 if (ret < 0) { 233 pr_debug("request_module() failed for" 234 " tcm_loop.ko: %d\n", ret); 235 return ERR_PTR(-EINVAL); 236 } 237 } 238 239 tf = target_core_get_fabric(name); 240 } 241 242 if (!tf) { 243 pr_debug("target_core_get_fabric() failed for %s\n", 244 name); 245 return ERR_PTR(-EINVAL); 246 } 247 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:" 248 " %s\n", tf->tf_ops->fabric_name); 249 /* 250 * On a successful target_core_get_fabric() look, the returned 251 * struct target_fabric_configfs *tf will contain a usage reference. 252 */ 253 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n", 254 &tf->tf_wwn_cit); 255 256 config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit); 257 258 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth", 259 &tf->tf_discovery_cit); 260 configfs_add_default_group(&tf->tf_disc_group, &tf->tf_group); 261 262 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric: %s\n", 263 config_item_name(&tf->tf_group.cg_item)); 264 return &tf->tf_group; 265 } 266 267 /* 268 * Called from struct target_core_group_ops->drop_item() 269 */ 270 static void target_core_deregister_fabric( 271 struct config_group *group, 272 struct config_item *item) 273 { 274 struct target_fabric_configfs *tf = container_of( 275 to_config_group(item), struct target_fabric_configfs, tf_group); 276 277 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in" 278 " tf list\n", config_item_name(item)); 279 280 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:" 281 " %s\n", tf->tf_ops->fabric_name); 282 atomic_dec(&tf->tf_access_cnt); 283 284 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci" 285 " %s\n", config_item_name(item)); 286 287 configfs_remove_default_groups(&tf->tf_group); 288 config_item_put(item); 289 } 290 291 static struct configfs_group_operations target_core_fabric_group_ops = { 292 .make_group = &target_core_register_fabric, 293 .drop_item = &target_core_deregister_fabric, 294 }; 295 296 /* 297 * All item attributes appearing in /sys/kernel/target/ appear here. 298 */ 299 static struct configfs_attribute *target_core_fabric_item_attrs[] = { 300 &target_core_item_attr_version, 301 &target_core_item_attr_dbroot, 302 NULL, 303 }; 304 305 /* 306 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/ 307 */ 308 static const struct config_item_type target_core_fabrics_item = { 309 .ct_group_ops = &target_core_fabric_group_ops, 310 .ct_attrs = target_core_fabric_item_attrs, 311 .ct_owner = THIS_MODULE, 312 }; 313 314 static struct configfs_subsystem target_core_fabrics = { 315 .su_group = { 316 .cg_item = { 317 .ci_namebuf = "target", 318 .ci_type = &target_core_fabrics_item, 319 }, 320 }, 321 }; 322 323 int target_depend_item(struct config_item *item) 324 { 325 return configfs_depend_item(&target_core_fabrics, item); 326 } 327 EXPORT_SYMBOL(target_depend_item); 328 329 void target_undepend_item(struct config_item *item) 330 { 331 return configfs_undepend_item(item); 332 } 333 EXPORT_SYMBOL(target_undepend_item); 334 335 /*############################################################################## 336 // Start functions called by external Target Fabrics Modules 337 //############################################################################*/ 338 339 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo) 340 { 341 if (tfo->fabric_alias) { 342 if (strlen(tfo->fabric_alias) >= TARGET_FABRIC_NAME_SIZE) { 343 pr_err("Passed alias: %s exceeds " 344 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_alias); 345 return -EINVAL; 346 } 347 } 348 if (!tfo->fabric_name) { 349 pr_err("Missing tfo->fabric_name\n"); 350 return -EINVAL; 351 } 352 if (strlen(tfo->fabric_name) >= TARGET_FABRIC_NAME_SIZE) { 353 pr_err("Passed name: %s exceeds " 354 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_name); 355 return -EINVAL; 356 } 357 if (!tfo->tpg_get_wwn) { 358 pr_err("Missing tfo->tpg_get_wwn()\n"); 359 return -EINVAL; 360 } 361 if (!tfo->tpg_get_tag) { 362 pr_err("Missing tfo->tpg_get_tag()\n"); 363 return -EINVAL; 364 } 365 if (!tfo->tpg_check_demo_mode) { 366 pr_err("Missing tfo->tpg_check_demo_mode()\n"); 367 return -EINVAL; 368 } 369 if (!tfo->tpg_check_demo_mode_cache) { 370 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n"); 371 return -EINVAL; 372 } 373 if (!tfo->tpg_check_demo_mode_write_protect) { 374 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n"); 375 return -EINVAL; 376 } 377 if (!tfo->tpg_check_prod_mode_write_protect) { 378 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n"); 379 return -EINVAL; 380 } 381 if (!tfo->tpg_get_inst_index) { 382 pr_err("Missing tfo->tpg_get_inst_index()\n"); 383 return -EINVAL; 384 } 385 if (!tfo->release_cmd) { 386 pr_err("Missing tfo->release_cmd()\n"); 387 return -EINVAL; 388 } 389 if (!tfo->sess_get_index) { 390 pr_err("Missing tfo->sess_get_index()\n"); 391 return -EINVAL; 392 } 393 if (!tfo->write_pending) { 394 pr_err("Missing tfo->write_pending()\n"); 395 return -EINVAL; 396 } 397 if (!tfo->set_default_node_attributes) { 398 pr_err("Missing tfo->set_default_node_attributes()\n"); 399 return -EINVAL; 400 } 401 if (!tfo->get_cmd_state) { 402 pr_err("Missing tfo->get_cmd_state()\n"); 403 return -EINVAL; 404 } 405 if (!tfo->queue_data_in) { 406 pr_err("Missing tfo->queue_data_in()\n"); 407 return -EINVAL; 408 } 409 if (!tfo->queue_status) { 410 pr_err("Missing tfo->queue_status()\n"); 411 return -EINVAL; 412 } 413 if (!tfo->queue_tm_rsp) { 414 pr_err("Missing tfo->queue_tm_rsp()\n"); 415 return -EINVAL; 416 } 417 if (!tfo->aborted_task) { 418 pr_err("Missing tfo->aborted_task()\n"); 419 return -EINVAL; 420 } 421 if (!tfo->check_stop_free) { 422 pr_err("Missing tfo->check_stop_free()\n"); 423 return -EINVAL; 424 } 425 /* 426 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn() 427 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in 428 * target_core_fabric_configfs.c WWN+TPG group context code. 429 */ 430 if (!tfo->fabric_make_wwn) { 431 pr_err("Missing tfo->fabric_make_wwn()\n"); 432 return -EINVAL; 433 } 434 if (!tfo->fabric_drop_wwn) { 435 pr_err("Missing tfo->fabric_drop_wwn()\n"); 436 return -EINVAL; 437 } 438 if (!tfo->fabric_make_tpg) { 439 pr_err("Missing tfo->fabric_make_tpg()\n"); 440 return -EINVAL; 441 } 442 if (!tfo->fabric_drop_tpg) { 443 pr_err("Missing tfo->fabric_drop_tpg()\n"); 444 return -EINVAL; 445 } 446 447 return 0; 448 } 449 450 int target_register_template(const struct target_core_fabric_ops *fo) 451 { 452 struct target_fabric_configfs *tf; 453 int ret; 454 455 ret = target_fabric_tf_ops_check(fo); 456 if (ret) 457 return ret; 458 459 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL); 460 if (!tf) { 461 pr_err("%s: could not allocate memory!\n", __func__); 462 return -ENOMEM; 463 } 464 465 INIT_LIST_HEAD(&tf->tf_list); 466 atomic_set(&tf->tf_access_cnt, 0); 467 tf->tf_ops = fo; 468 target_fabric_setup_cits(tf); 469 470 mutex_lock(&g_tf_lock); 471 list_add_tail(&tf->tf_list, &g_tf_list); 472 mutex_unlock(&g_tf_lock); 473 474 return 0; 475 } 476 EXPORT_SYMBOL(target_register_template); 477 478 void target_unregister_template(const struct target_core_fabric_ops *fo) 479 { 480 struct target_fabric_configfs *t; 481 482 mutex_lock(&g_tf_lock); 483 list_for_each_entry(t, &g_tf_list, tf_list) { 484 if (!strcmp(t->tf_ops->fabric_name, fo->fabric_name)) { 485 BUG_ON(atomic_read(&t->tf_access_cnt)); 486 list_del(&t->tf_list); 487 mutex_unlock(&g_tf_lock); 488 /* 489 * Wait for any outstanding fabric se_deve_entry->rcu_head 490 * callbacks to complete post kfree_rcu(), before allowing 491 * fabric driver unload of TFO->module to proceed. 492 */ 493 rcu_barrier(); 494 kfree(t->tf_tpg_base_cit.ct_attrs); 495 kfree(t); 496 return; 497 } 498 } 499 mutex_unlock(&g_tf_lock); 500 } 501 EXPORT_SYMBOL(target_unregister_template); 502 503 /*############################################################################## 504 // Stop functions called by external Target Fabrics Modules 505 //############################################################################*/ 506 507 static inline struct se_dev_attrib *to_attrib(struct config_item *item) 508 { 509 return container_of(to_config_group(item), struct se_dev_attrib, 510 da_group); 511 } 512 513 /* Start functions for struct config_item_type tb_dev_attrib_cit */ 514 #define DEF_CONFIGFS_ATTRIB_SHOW(_name) \ 515 static ssize_t _name##_show(struct config_item *item, char *page) \ 516 { \ 517 return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \ 518 } 519 520 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias); 521 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo); 522 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write); 523 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read); 524 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache); 525 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl); 526 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas); 527 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu); 528 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws); 529 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw); 530 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc); 531 DEF_CONFIGFS_ATTRIB_SHOW(emulate_pr); 532 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type); 533 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type); 534 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify); 535 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids); 536 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot); 537 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord); 538 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl); 539 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size); 540 DEF_CONFIGFS_ATTRIB_SHOW(block_size); 541 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors); 542 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors); 543 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth); 544 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth); 545 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count); 546 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count); 547 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity); 548 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment); 549 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data); 550 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len); 551 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rsoc); 552 553 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \ 554 static ssize_t _name##_store(struct config_item *item, const char *page,\ 555 size_t count) \ 556 { \ 557 struct se_dev_attrib *da = to_attrib(item); \ 558 u32 val; \ 559 int ret; \ 560 \ 561 ret = kstrtou32(page, 0, &val); \ 562 if (ret < 0) \ 563 return ret; \ 564 da->_name = val; \ 565 return count; \ 566 } 567 568 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count); 569 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count); 570 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity); 571 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment); 572 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len); 573 574 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \ 575 static ssize_t _name##_store(struct config_item *item, const char *page, \ 576 size_t count) \ 577 { \ 578 struct se_dev_attrib *da = to_attrib(item); \ 579 bool flag; \ 580 int ret; \ 581 \ 582 ret = kstrtobool(page, &flag); \ 583 if (ret < 0) \ 584 return ret; \ 585 da->_name = flag; \ 586 return count; \ 587 } 588 589 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write); 590 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw); 591 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc); 592 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr); 593 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids); 594 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot); 595 596 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \ 597 static ssize_t _name##_store(struct config_item *item, const char *page,\ 598 size_t count) \ 599 { \ 600 printk_once(KERN_WARNING \ 601 "ignoring deprecated %s attribute\n", \ 602 __stringify(_name)); \ 603 return count; \ 604 } 605 606 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo); 607 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read); 608 609 static void dev_set_t10_wwn_model_alias(struct se_device *dev) 610 { 611 const char *configname; 612 613 configname = config_item_name(&dev->dev_group.cg_item); 614 if (strlen(configname) >= INQUIRY_MODEL_LEN) { 615 pr_warn("dev[%p]: Backstore name '%s' is too long for " 616 "INQUIRY_MODEL, truncating to 15 characters\n", dev, 617 configname); 618 } 619 /* 620 * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1) 621 * here without potentially breaking existing setups, so continue to 622 * truncate one byte shorter than what can be carried in INQUIRY. 623 */ 624 strlcpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN); 625 } 626 627 static ssize_t emulate_model_alias_store(struct config_item *item, 628 const char *page, size_t count) 629 { 630 struct se_dev_attrib *da = to_attrib(item); 631 struct se_device *dev = da->da_dev; 632 bool flag; 633 int ret; 634 635 if (dev->export_count) { 636 pr_err("dev[%p]: Unable to change model alias" 637 " while export_count is %d\n", 638 dev, dev->export_count); 639 return -EINVAL; 640 } 641 642 ret = kstrtobool(page, &flag); 643 if (ret < 0) 644 return ret; 645 646 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); 647 if (flag) { 648 dev_set_t10_wwn_model_alias(dev); 649 } else { 650 strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod, 651 sizeof(dev->t10_wwn.model)); 652 } 653 da->emulate_model_alias = flag; 654 return count; 655 } 656 657 static ssize_t emulate_write_cache_store(struct config_item *item, 658 const char *page, size_t count) 659 { 660 struct se_dev_attrib *da = to_attrib(item); 661 bool flag; 662 int ret; 663 664 ret = kstrtobool(page, &flag); 665 if (ret < 0) 666 return ret; 667 668 if (flag && da->da_dev->transport->get_write_cache) { 669 pr_err("emulate_write_cache not supported for this device\n"); 670 return -EINVAL; 671 } 672 673 da->emulate_write_cache = flag; 674 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 675 da->da_dev, flag); 676 return count; 677 } 678 679 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item, 680 const char *page, size_t count) 681 { 682 struct se_dev_attrib *da = to_attrib(item); 683 u32 val; 684 int ret; 685 686 ret = kstrtou32(page, 0, &val); 687 if (ret < 0) 688 return ret; 689 690 if (val != TARGET_UA_INTLCK_CTRL_CLEAR 691 && val != TARGET_UA_INTLCK_CTRL_NO_CLEAR 692 && val != TARGET_UA_INTLCK_CTRL_ESTABLISH_UA) { 693 pr_err("Illegal value %d\n", val); 694 return -EINVAL; 695 } 696 697 if (da->da_dev->export_count) { 698 pr_err("dev[%p]: Unable to change SE Device" 699 " UA_INTRLCK_CTRL while export_count is %d\n", 700 da->da_dev, da->da_dev->export_count); 701 return -EINVAL; 702 } 703 da->emulate_ua_intlck_ctrl = val; 704 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 705 da->da_dev, val); 706 return count; 707 } 708 709 static ssize_t emulate_tas_store(struct config_item *item, 710 const char *page, size_t count) 711 { 712 struct se_dev_attrib *da = to_attrib(item); 713 bool flag; 714 int ret; 715 716 ret = kstrtobool(page, &flag); 717 if (ret < 0) 718 return ret; 719 720 if (da->da_dev->export_count) { 721 pr_err("dev[%p]: Unable to change SE Device TAS while" 722 " export_count is %d\n", 723 da->da_dev, da->da_dev->export_count); 724 return -EINVAL; 725 } 726 da->emulate_tas = flag; 727 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 728 da->da_dev, flag ? "Enabled" : "Disabled"); 729 730 return count; 731 } 732 733 static ssize_t emulate_tpu_store(struct config_item *item, 734 const char *page, size_t count) 735 { 736 struct se_dev_attrib *da = to_attrib(item); 737 struct se_device *dev = da->da_dev; 738 bool flag; 739 int ret; 740 741 ret = kstrtobool(page, &flag); 742 if (ret < 0) 743 return ret; 744 745 /* 746 * We expect this value to be non-zero when generic Block Layer 747 * Discard supported is detected iblock_create_virtdevice(). 748 */ 749 if (flag && !da->max_unmap_block_desc_count) { 750 if (!dev->transport->configure_unmap || 751 !dev->transport->configure_unmap(dev)) { 752 pr_err("Generic Block Discard not supported\n"); 753 return -ENOSYS; 754 } 755 } 756 757 da->emulate_tpu = flag; 758 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 759 da->da_dev, flag); 760 return count; 761 } 762 763 static ssize_t emulate_tpws_store(struct config_item *item, 764 const char *page, size_t count) 765 { 766 struct se_dev_attrib *da = to_attrib(item); 767 struct se_device *dev = da->da_dev; 768 bool flag; 769 int ret; 770 771 ret = kstrtobool(page, &flag); 772 if (ret < 0) 773 return ret; 774 775 /* 776 * We expect this value to be non-zero when generic Block Layer 777 * Discard supported is detected iblock_create_virtdevice(). 778 */ 779 if (flag && !da->max_unmap_block_desc_count) { 780 if (!dev->transport->configure_unmap || 781 !dev->transport->configure_unmap(dev)) { 782 pr_err("Generic Block Discard not supported\n"); 783 return -ENOSYS; 784 } 785 } 786 787 da->emulate_tpws = flag; 788 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 789 da->da_dev, flag); 790 return count; 791 } 792 793 static ssize_t pi_prot_type_store(struct config_item *item, 794 const char *page, size_t count) 795 { 796 struct se_dev_attrib *da = to_attrib(item); 797 int old_prot = da->pi_prot_type, ret; 798 struct se_device *dev = da->da_dev; 799 u32 flag; 800 801 ret = kstrtou32(page, 0, &flag); 802 if (ret < 0) 803 return ret; 804 805 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) { 806 pr_err("Illegal value %d for pi_prot_type\n", flag); 807 return -EINVAL; 808 } 809 if (flag == 2) { 810 pr_err("DIF TYPE2 protection currently not supported\n"); 811 return -ENOSYS; 812 } 813 if (da->hw_pi_prot_type) { 814 pr_warn("DIF protection enabled on underlying hardware," 815 " ignoring\n"); 816 return count; 817 } 818 if (!dev->transport->init_prot || !dev->transport->free_prot) { 819 /* 0 is only allowed value for non-supporting backends */ 820 if (flag == 0) 821 return count; 822 823 pr_err("DIF protection not supported by backend: %s\n", 824 dev->transport->name); 825 return -ENOSYS; 826 } 827 if (!target_dev_configured(dev)) { 828 pr_err("DIF protection requires device to be configured\n"); 829 return -ENODEV; 830 } 831 if (dev->export_count) { 832 pr_err("dev[%p]: Unable to change SE Device PROT type while" 833 " export_count is %d\n", dev, dev->export_count); 834 return -EINVAL; 835 } 836 837 da->pi_prot_type = flag; 838 839 if (flag && !old_prot) { 840 ret = dev->transport->init_prot(dev); 841 if (ret) { 842 da->pi_prot_type = old_prot; 843 da->pi_prot_verify = (bool) da->pi_prot_type; 844 return ret; 845 } 846 847 } else if (!flag && old_prot) { 848 dev->transport->free_prot(dev); 849 } 850 851 da->pi_prot_verify = (bool) da->pi_prot_type; 852 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag); 853 return count; 854 } 855 856 /* always zero, but attr needs to remain RW to avoid userspace breakage */ 857 static ssize_t pi_prot_format_show(struct config_item *item, char *page) 858 { 859 return snprintf(page, PAGE_SIZE, "0\n"); 860 } 861 862 static ssize_t pi_prot_format_store(struct config_item *item, 863 const char *page, size_t count) 864 { 865 struct se_dev_attrib *da = to_attrib(item); 866 struct se_device *dev = da->da_dev; 867 bool flag; 868 int ret; 869 870 ret = kstrtobool(page, &flag); 871 if (ret < 0) 872 return ret; 873 874 if (!flag) 875 return count; 876 877 if (!dev->transport->format_prot) { 878 pr_err("DIF protection format not supported by backend %s\n", 879 dev->transport->name); 880 return -ENOSYS; 881 } 882 if (!target_dev_configured(dev)) { 883 pr_err("DIF protection format requires device to be configured\n"); 884 return -ENODEV; 885 } 886 if (dev->export_count) { 887 pr_err("dev[%p]: Unable to format SE Device PROT type while" 888 " export_count is %d\n", dev, dev->export_count); 889 return -EINVAL; 890 } 891 892 ret = dev->transport->format_prot(dev); 893 if (ret) 894 return ret; 895 896 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev); 897 return count; 898 } 899 900 static ssize_t pi_prot_verify_store(struct config_item *item, 901 const char *page, size_t count) 902 { 903 struct se_dev_attrib *da = to_attrib(item); 904 bool flag; 905 int ret; 906 907 ret = kstrtobool(page, &flag); 908 if (ret < 0) 909 return ret; 910 911 if (!flag) { 912 da->pi_prot_verify = flag; 913 return count; 914 } 915 if (da->hw_pi_prot_type) { 916 pr_warn("DIF protection enabled on underlying hardware," 917 " ignoring\n"); 918 return count; 919 } 920 if (!da->pi_prot_type) { 921 pr_warn("DIF protection not supported by backend, ignoring\n"); 922 return count; 923 } 924 da->pi_prot_verify = flag; 925 926 return count; 927 } 928 929 static ssize_t force_pr_aptpl_store(struct config_item *item, 930 const char *page, size_t count) 931 { 932 struct se_dev_attrib *da = to_attrib(item); 933 bool flag; 934 int ret; 935 936 ret = kstrtobool(page, &flag); 937 if (ret < 0) 938 return ret; 939 if (da->da_dev->export_count) { 940 pr_err("dev[%p]: Unable to set force_pr_aptpl while" 941 " export_count is %d\n", 942 da->da_dev, da->da_dev->export_count); 943 return -EINVAL; 944 } 945 946 da->force_pr_aptpl = flag; 947 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag); 948 return count; 949 } 950 951 static ssize_t emulate_rest_reord_store(struct config_item *item, 952 const char *page, size_t count) 953 { 954 struct se_dev_attrib *da = to_attrib(item); 955 bool flag; 956 int ret; 957 958 ret = kstrtobool(page, &flag); 959 if (ret < 0) 960 return ret; 961 962 if (flag != 0) { 963 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted" 964 " reordering not implemented\n", da->da_dev); 965 return -ENOSYS; 966 } 967 da->emulate_rest_reord = flag; 968 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", 969 da->da_dev, flag); 970 return count; 971 } 972 973 static ssize_t unmap_zeroes_data_store(struct config_item *item, 974 const char *page, size_t count) 975 { 976 struct se_dev_attrib *da = to_attrib(item); 977 struct se_device *dev = da->da_dev; 978 bool flag; 979 int ret; 980 981 ret = kstrtobool(page, &flag); 982 if (ret < 0) 983 return ret; 984 985 if (da->da_dev->export_count) { 986 pr_err("dev[%p]: Unable to change SE Device" 987 " unmap_zeroes_data while export_count is %d\n", 988 da->da_dev, da->da_dev->export_count); 989 return -EINVAL; 990 } 991 /* 992 * We expect this value to be non-zero when generic Block Layer 993 * Discard supported is detected iblock_configure_device(). 994 */ 995 if (flag && !da->max_unmap_block_desc_count) { 996 if (!dev->transport->configure_unmap || 997 !dev->transport->configure_unmap(dev)) { 998 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set because max_unmap_block_desc_count is zero\n", 999 da->da_dev); 1000 return -ENOSYS; 1001 } 1002 } 1003 da->unmap_zeroes_data = flag; 1004 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n", 1005 da->da_dev, flag); 1006 return count; 1007 } 1008 1009 /* 1010 * Note, this can only be called on unexported SE Device Object. 1011 */ 1012 static ssize_t queue_depth_store(struct config_item *item, 1013 const char *page, size_t count) 1014 { 1015 struct se_dev_attrib *da = to_attrib(item); 1016 struct se_device *dev = da->da_dev; 1017 u32 val; 1018 int ret; 1019 1020 ret = kstrtou32(page, 0, &val); 1021 if (ret < 0) 1022 return ret; 1023 1024 if (dev->export_count) { 1025 pr_err("dev[%p]: Unable to change SE Device TCQ while" 1026 " export_count is %d\n", 1027 dev, dev->export_count); 1028 return -EINVAL; 1029 } 1030 if (!val) { 1031 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev); 1032 return -EINVAL; 1033 } 1034 1035 if (val > dev->dev_attrib.queue_depth) { 1036 if (val > dev->dev_attrib.hw_queue_depth) { 1037 pr_err("dev[%p]: Passed queue_depth:" 1038 " %u exceeds TCM/SE_Device MAX" 1039 " TCQ: %u\n", dev, val, 1040 dev->dev_attrib.hw_queue_depth); 1041 return -EINVAL; 1042 } 1043 } 1044 da->queue_depth = dev->queue_depth = val; 1045 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val); 1046 return count; 1047 } 1048 1049 static ssize_t optimal_sectors_store(struct config_item *item, 1050 const char *page, size_t count) 1051 { 1052 struct se_dev_attrib *da = to_attrib(item); 1053 u32 val; 1054 int ret; 1055 1056 ret = kstrtou32(page, 0, &val); 1057 if (ret < 0) 1058 return ret; 1059 1060 if (da->da_dev->export_count) { 1061 pr_err("dev[%p]: Unable to change SE Device" 1062 " optimal_sectors while export_count is %d\n", 1063 da->da_dev, da->da_dev->export_count); 1064 return -EINVAL; 1065 } 1066 if (val > da->hw_max_sectors) { 1067 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1068 " greater than hw_max_sectors: %u\n", 1069 da->da_dev, val, da->hw_max_sectors); 1070 return -EINVAL; 1071 } 1072 1073 da->optimal_sectors = val; 1074 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1075 da->da_dev, val); 1076 return count; 1077 } 1078 1079 static ssize_t block_size_store(struct config_item *item, 1080 const char *page, size_t count) 1081 { 1082 struct se_dev_attrib *da = to_attrib(item); 1083 u32 val; 1084 int ret; 1085 1086 ret = kstrtou32(page, 0, &val); 1087 if (ret < 0) 1088 return ret; 1089 1090 if (da->da_dev->export_count) { 1091 pr_err("dev[%p]: Unable to change SE Device block_size" 1092 " while export_count is %d\n", 1093 da->da_dev, da->da_dev->export_count); 1094 return -EINVAL; 1095 } 1096 1097 if (val != 512 && val != 1024 && val != 2048 && val != 4096) { 1098 pr_err("dev[%p]: Illegal value for block_device: %u" 1099 " for SE device, must be 512, 1024, 2048 or 4096\n", 1100 da->da_dev, val); 1101 return -EINVAL; 1102 } 1103 1104 da->block_size = 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 = kstrtobool(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 = kstrtobool(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 static ssize_t emulate_rsoc_store(struct config_item *item, 1190 const char *page, size_t count) 1191 { 1192 struct se_dev_attrib *da = to_attrib(item); 1193 bool flag; 1194 int ret; 1195 1196 ret = kstrtobool(page, &flag); 1197 if (ret < 0) 1198 return ret; 1199 1200 da->emulate_rsoc = flag; 1201 pr_debug("dev[%p]: SE Device REPORT_SUPPORTED_OPERATION_CODES_EMULATION flag: %d\n", 1202 da->da_dev, flag); 1203 return count; 1204 } 1205 1206 CONFIGFS_ATTR(, emulate_model_alias); 1207 CONFIGFS_ATTR(, emulate_dpo); 1208 CONFIGFS_ATTR(, emulate_fua_write); 1209 CONFIGFS_ATTR(, emulate_fua_read); 1210 CONFIGFS_ATTR(, emulate_write_cache); 1211 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl); 1212 CONFIGFS_ATTR(, emulate_tas); 1213 CONFIGFS_ATTR(, emulate_tpu); 1214 CONFIGFS_ATTR(, emulate_tpws); 1215 CONFIGFS_ATTR(, emulate_caw); 1216 CONFIGFS_ATTR(, emulate_3pc); 1217 CONFIGFS_ATTR(, emulate_pr); 1218 CONFIGFS_ATTR(, emulate_rsoc); 1219 CONFIGFS_ATTR(, pi_prot_type); 1220 CONFIGFS_ATTR_RO(, hw_pi_prot_type); 1221 CONFIGFS_ATTR(, pi_prot_format); 1222 CONFIGFS_ATTR(, pi_prot_verify); 1223 CONFIGFS_ATTR(, enforce_pr_isids); 1224 CONFIGFS_ATTR(, is_nonrot); 1225 CONFIGFS_ATTR(, emulate_rest_reord); 1226 CONFIGFS_ATTR(, force_pr_aptpl); 1227 CONFIGFS_ATTR_RO(, hw_block_size); 1228 CONFIGFS_ATTR(, block_size); 1229 CONFIGFS_ATTR_RO(, hw_max_sectors); 1230 CONFIGFS_ATTR(, optimal_sectors); 1231 CONFIGFS_ATTR_RO(, hw_queue_depth); 1232 CONFIGFS_ATTR(, queue_depth); 1233 CONFIGFS_ATTR(, max_unmap_lba_count); 1234 CONFIGFS_ATTR(, max_unmap_block_desc_count); 1235 CONFIGFS_ATTR(, unmap_granularity); 1236 CONFIGFS_ATTR(, unmap_granularity_alignment); 1237 CONFIGFS_ATTR(, unmap_zeroes_data); 1238 CONFIGFS_ATTR(, max_write_same_len); 1239 CONFIGFS_ATTR(, alua_support); 1240 CONFIGFS_ATTR(, pgr_support); 1241 1242 /* 1243 * dev_attrib attributes for devices using the target core SBC/SPC 1244 * interpreter. Any backend using spc_parse_cdb should be using 1245 * these. 1246 */ 1247 struct configfs_attribute *sbc_attrib_attrs[] = { 1248 &attr_emulate_model_alias, 1249 &attr_emulate_dpo, 1250 &attr_emulate_fua_write, 1251 &attr_emulate_fua_read, 1252 &attr_emulate_write_cache, 1253 &attr_emulate_ua_intlck_ctrl, 1254 &attr_emulate_tas, 1255 &attr_emulate_tpu, 1256 &attr_emulate_tpws, 1257 &attr_emulate_caw, 1258 &attr_emulate_3pc, 1259 &attr_emulate_pr, 1260 &attr_pi_prot_type, 1261 &attr_hw_pi_prot_type, 1262 &attr_pi_prot_format, 1263 &attr_pi_prot_verify, 1264 &attr_enforce_pr_isids, 1265 &attr_is_nonrot, 1266 &attr_emulate_rest_reord, 1267 &attr_force_pr_aptpl, 1268 &attr_hw_block_size, 1269 &attr_block_size, 1270 &attr_hw_max_sectors, 1271 &attr_optimal_sectors, 1272 &attr_hw_queue_depth, 1273 &attr_queue_depth, 1274 &attr_max_unmap_lba_count, 1275 &attr_max_unmap_block_desc_count, 1276 &attr_unmap_granularity, 1277 &attr_unmap_granularity_alignment, 1278 &attr_unmap_zeroes_data, 1279 &attr_max_write_same_len, 1280 &attr_alua_support, 1281 &attr_pgr_support, 1282 &attr_emulate_rsoc, 1283 NULL, 1284 }; 1285 EXPORT_SYMBOL(sbc_attrib_attrs); 1286 1287 /* 1288 * Minimal dev_attrib attributes for devices passing through CDBs. 1289 * In this case we only provide a few read-only attributes for 1290 * backwards compatibility. 1291 */ 1292 struct configfs_attribute *passthrough_attrib_attrs[] = { 1293 &attr_hw_pi_prot_type, 1294 &attr_hw_block_size, 1295 &attr_hw_max_sectors, 1296 &attr_hw_queue_depth, 1297 &attr_emulate_pr, 1298 &attr_alua_support, 1299 &attr_pgr_support, 1300 NULL, 1301 }; 1302 EXPORT_SYMBOL(passthrough_attrib_attrs); 1303 1304 /* 1305 * pr related dev_attrib attributes for devices passing through CDBs, 1306 * but allowing in core pr emulation. 1307 */ 1308 struct configfs_attribute *passthrough_pr_attrib_attrs[] = { 1309 &attr_enforce_pr_isids, 1310 &attr_force_pr_aptpl, 1311 NULL, 1312 }; 1313 EXPORT_SYMBOL(passthrough_pr_attrib_attrs); 1314 1315 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL); 1316 TB_CIT_SETUP_DRV(dev_action, NULL, NULL); 1317 1318 /* End functions for struct config_item_type tb_dev_attrib_cit */ 1319 1320 /* Start functions for struct config_item_type tb_dev_wwn_cit */ 1321 1322 static struct t10_wwn *to_t10_wwn(struct config_item *item) 1323 { 1324 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group); 1325 } 1326 1327 static ssize_t target_check_inquiry_data(char *buf) 1328 { 1329 size_t len; 1330 int i; 1331 1332 len = strlen(buf); 1333 1334 /* 1335 * SPC 4.3.1: 1336 * ASCII data fields shall contain only ASCII printable characters 1337 * (i.e., code values 20h to 7Eh) and may be terminated with one or 1338 * more ASCII null (00h) characters. 1339 */ 1340 for (i = 0; i < len; i++) { 1341 if (buf[i] < 0x20 || buf[i] > 0x7E) { 1342 pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n"); 1343 return -EINVAL; 1344 } 1345 } 1346 1347 return len; 1348 } 1349 1350 /* 1351 * STANDARD and VPD page 0x83 T10 Vendor Identification 1352 */ 1353 static ssize_t target_wwn_vendor_id_show(struct config_item *item, 1354 char *page) 1355 { 1356 return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]); 1357 } 1358 1359 static ssize_t target_wwn_vendor_id_store(struct config_item *item, 1360 const char *page, size_t count) 1361 { 1362 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1363 struct se_device *dev = t10_wwn->t10_dev; 1364 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1365 unsigned char buf[INQUIRY_VENDOR_LEN + 2]; 1366 char *stripped = NULL; 1367 size_t len; 1368 ssize_t ret; 1369 1370 len = strlcpy(buf, page, sizeof(buf)); 1371 if (len < sizeof(buf)) { 1372 /* Strip any newline added from userspace. */ 1373 stripped = strstrip(buf); 1374 len = strlen(stripped); 1375 } 1376 if (len > INQUIRY_VENDOR_LEN) { 1377 pr_err("Emulated T10 Vendor Identification exceeds" 1378 " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN) 1379 "\n"); 1380 return -EOVERFLOW; 1381 } 1382 1383 ret = target_check_inquiry_data(stripped); 1384 1385 if (ret < 0) 1386 return ret; 1387 1388 /* 1389 * Check to see if any active exports exist. If they do exist, fail 1390 * here as changing this information on the fly (underneath the 1391 * initiator side OS dependent multipath code) could cause negative 1392 * effects. 1393 */ 1394 if (dev->export_count) { 1395 pr_err("Unable to set T10 Vendor Identification while" 1396 " active %d exports exist\n", dev->export_count); 1397 return -EINVAL; 1398 } 1399 1400 BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1); 1401 strlcpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor)); 1402 1403 pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:" 1404 " %s\n", dev->t10_wwn.vendor); 1405 1406 return count; 1407 } 1408 1409 static ssize_t target_wwn_product_id_show(struct config_item *item, 1410 char *page) 1411 { 1412 return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]); 1413 } 1414 1415 static ssize_t target_wwn_product_id_store(struct config_item *item, 1416 const char *page, size_t count) 1417 { 1418 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1419 struct se_device *dev = t10_wwn->t10_dev; 1420 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1421 unsigned char buf[INQUIRY_MODEL_LEN + 2]; 1422 char *stripped = NULL; 1423 size_t len; 1424 ssize_t ret; 1425 1426 len = strlcpy(buf, page, sizeof(buf)); 1427 if (len < sizeof(buf)) { 1428 /* Strip any newline added from userspace. */ 1429 stripped = strstrip(buf); 1430 len = strlen(stripped); 1431 } 1432 if (len > INQUIRY_MODEL_LEN) { 1433 pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: " 1434 __stringify(INQUIRY_MODEL_LEN) 1435 "\n"); 1436 return -EOVERFLOW; 1437 } 1438 1439 ret = target_check_inquiry_data(stripped); 1440 1441 if (ret < 0) 1442 return ret; 1443 1444 /* 1445 * Check to see if any active exports exist. If they do exist, fail 1446 * here as changing this information on the fly (underneath the 1447 * initiator side OS dependent multipath code) could cause negative 1448 * effects. 1449 */ 1450 if (dev->export_count) { 1451 pr_err("Unable to set T10 Model while active %d exports exist\n", 1452 dev->export_count); 1453 return -EINVAL; 1454 } 1455 1456 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); 1457 strlcpy(dev->t10_wwn.model, stripped, sizeof(dev->t10_wwn.model)); 1458 1459 pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n", 1460 dev->t10_wwn.model); 1461 1462 return count; 1463 } 1464 1465 static ssize_t target_wwn_revision_show(struct config_item *item, 1466 char *page) 1467 { 1468 return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]); 1469 } 1470 1471 static ssize_t target_wwn_revision_store(struct config_item *item, 1472 const char *page, size_t count) 1473 { 1474 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1475 struct se_device *dev = t10_wwn->t10_dev; 1476 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1477 unsigned char buf[INQUIRY_REVISION_LEN + 2]; 1478 char *stripped = NULL; 1479 size_t len; 1480 ssize_t ret; 1481 1482 len = strlcpy(buf, page, sizeof(buf)); 1483 if (len < sizeof(buf)) { 1484 /* Strip any newline added from userspace. */ 1485 stripped = strstrip(buf); 1486 len = strlen(stripped); 1487 } 1488 if (len > INQUIRY_REVISION_LEN) { 1489 pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: " 1490 __stringify(INQUIRY_REVISION_LEN) 1491 "\n"); 1492 return -EOVERFLOW; 1493 } 1494 1495 ret = target_check_inquiry_data(stripped); 1496 1497 if (ret < 0) 1498 return ret; 1499 1500 /* 1501 * Check to see if any active exports exist. If they do exist, fail 1502 * here as changing this information on the fly (underneath the 1503 * initiator side OS dependent multipath code) could cause negative 1504 * effects. 1505 */ 1506 if (dev->export_count) { 1507 pr_err("Unable to set T10 Revision while active %d exports exist\n", 1508 dev->export_count); 1509 return -EINVAL; 1510 } 1511 1512 BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1); 1513 strlcpy(dev->t10_wwn.revision, stripped, sizeof(dev->t10_wwn.revision)); 1514 1515 pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n", 1516 dev->t10_wwn.revision); 1517 1518 return count; 1519 } 1520 1521 static ssize_t 1522 target_wwn_company_id_show(struct config_item *item, 1523 char *page) 1524 { 1525 return snprintf(page, PAGE_SIZE, "%#08x\n", 1526 to_t10_wwn(item)->company_id); 1527 } 1528 1529 static ssize_t 1530 target_wwn_company_id_store(struct config_item *item, 1531 const char *page, size_t count) 1532 { 1533 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1534 struct se_device *dev = t10_wwn->t10_dev; 1535 u32 val; 1536 int ret; 1537 1538 /* 1539 * The IEEE COMPANY_ID field should contain a 24-bit canonical 1540 * form OUI assigned by the IEEE. 1541 */ 1542 ret = kstrtou32(page, 0, &val); 1543 if (ret < 0) 1544 return ret; 1545 1546 if (val >= 0x1000000) 1547 return -EOVERFLOW; 1548 1549 /* 1550 * Check to see if any active exports exist. If they do exist, fail 1551 * here as changing this information on the fly (underneath the 1552 * initiator side OS dependent multipath code) could cause negative 1553 * effects. 1554 */ 1555 if (dev->export_count) { 1556 pr_err("Unable to set Company ID while %u exports exist\n", 1557 dev->export_count); 1558 return -EINVAL; 1559 } 1560 1561 t10_wwn->company_id = val; 1562 1563 pr_debug("Target_Core_ConfigFS: Set IEEE Company ID: %#08x\n", 1564 t10_wwn->company_id); 1565 1566 return count; 1567 } 1568 1569 /* 1570 * VPD page 0x80 Unit serial 1571 */ 1572 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item, 1573 char *page) 1574 { 1575 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 1576 &to_t10_wwn(item)->unit_serial[0]); 1577 } 1578 1579 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item, 1580 const char *page, size_t count) 1581 { 1582 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1583 struct se_device *dev = t10_wwn->t10_dev; 1584 unsigned char buf[INQUIRY_VPD_SERIAL_LEN] = { }; 1585 1586 /* 1587 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 1588 * from the struct scsi_device level firmware, do not allow 1589 * VPD Unit Serial to be emulated. 1590 * 1591 * Note this struct scsi_device could also be emulating VPD 1592 * information from its drivers/scsi LLD. But for now we assume 1593 * it is doing 'the right thing' wrt a world wide unique 1594 * VPD Unit Serial Number that OS dependent multipath can depend on. 1595 */ 1596 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) { 1597 pr_err("Underlying SCSI device firmware provided VPD" 1598 " Unit Serial, ignoring request\n"); 1599 return -EOPNOTSUPP; 1600 } 1601 1602 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 1603 pr_err("Emulated VPD Unit Serial exceeds" 1604 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 1605 return -EOVERFLOW; 1606 } 1607 /* 1608 * Check to see if any active $FABRIC_MOD exports exist. If they 1609 * do exist, fail here as changing this information on the fly 1610 * (underneath the initiator side OS dependent multipath code) 1611 * could cause negative effects. 1612 */ 1613 if (dev->export_count) { 1614 pr_err("Unable to set VPD Unit Serial while" 1615 " active %d $FABRIC_MOD exports exist\n", 1616 dev->export_count); 1617 return -EINVAL; 1618 } 1619 1620 /* 1621 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 1622 * 1623 * Also, strip any newline added from the userspace 1624 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 1625 */ 1626 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 1627 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 1628 "%s", strstrip(buf)); 1629 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL; 1630 1631 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 1632 " %s\n", dev->t10_wwn.unit_serial); 1633 1634 return count; 1635 } 1636 1637 /* 1638 * VPD page 0x83 Protocol Identifier 1639 */ 1640 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item, 1641 char *page) 1642 { 1643 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1644 struct t10_vpd *vpd; 1645 unsigned char buf[VPD_TMP_BUF_SIZE] = { }; 1646 ssize_t len = 0; 1647 1648 spin_lock(&t10_wwn->t10_vpd_lock); 1649 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 1650 if (!vpd->protocol_identifier_set) 1651 continue; 1652 1653 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 1654 1655 if (len + strlen(buf) >= PAGE_SIZE) 1656 break; 1657 1658 len += sprintf(page+len, "%s", buf); 1659 } 1660 spin_unlock(&t10_wwn->t10_vpd_lock); 1661 1662 return len; 1663 } 1664 1665 /* 1666 * Generic wrapper for dumping VPD identifiers by association. 1667 */ 1668 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 1669 static ssize_t target_wwn_##_name##_show(struct config_item *item, \ 1670 char *page) \ 1671 { \ 1672 struct t10_wwn *t10_wwn = to_t10_wwn(item); \ 1673 struct t10_vpd *vpd; \ 1674 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 1675 ssize_t len = 0; \ 1676 \ 1677 spin_lock(&t10_wwn->t10_vpd_lock); \ 1678 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 1679 if (vpd->association != _assoc) \ 1680 continue; \ 1681 \ 1682 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1683 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 1684 if (len + strlen(buf) >= PAGE_SIZE) \ 1685 break; \ 1686 len += sprintf(page+len, "%s", buf); \ 1687 \ 1688 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1689 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 1690 if (len + strlen(buf) >= PAGE_SIZE) \ 1691 break; \ 1692 len += sprintf(page+len, "%s", buf); \ 1693 \ 1694 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1695 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 1696 if (len + strlen(buf) >= PAGE_SIZE) \ 1697 break; \ 1698 len += sprintf(page+len, "%s", buf); \ 1699 } \ 1700 spin_unlock(&t10_wwn->t10_vpd_lock); \ 1701 \ 1702 return len; \ 1703 } 1704 1705 /* VPD page 0x83 Association: Logical Unit */ 1706 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 1707 /* VPD page 0x83 Association: Target Port */ 1708 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 1709 /* VPD page 0x83 Association: SCSI Target Device */ 1710 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 1711 1712 CONFIGFS_ATTR(target_wwn_, vendor_id); 1713 CONFIGFS_ATTR(target_wwn_, product_id); 1714 CONFIGFS_ATTR(target_wwn_, revision); 1715 CONFIGFS_ATTR(target_wwn_, company_id); 1716 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial); 1717 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier); 1718 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit); 1719 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port); 1720 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device); 1721 1722 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 1723 &target_wwn_attr_vendor_id, 1724 &target_wwn_attr_product_id, 1725 &target_wwn_attr_revision, 1726 &target_wwn_attr_company_id, 1727 &target_wwn_attr_vpd_unit_serial, 1728 &target_wwn_attr_vpd_protocol_identifier, 1729 &target_wwn_attr_vpd_assoc_logical_unit, 1730 &target_wwn_attr_vpd_assoc_target_port, 1731 &target_wwn_attr_vpd_assoc_scsi_target_device, 1732 NULL, 1733 }; 1734 1735 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs); 1736 1737 /* End functions for struct config_item_type tb_dev_wwn_cit */ 1738 1739 /* Start functions for struct config_item_type tb_dev_pr_cit */ 1740 1741 static struct se_device *pr_to_dev(struct config_item *item) 1742 { 1743 return container_of(to_config_group(item), struct se_device, 1744 dev_pr_group); 1745 } 1746 1747 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev, 1748 char *page) 1749 { 1750 struct se_node_acl *se_nacl; 1751 struct t10_pr_registration *pr_reg; 1752 char i_buf[PR_REG_ISID_ID_LEN] = { }; 1753 1754 pr_reg = dev->dev_pr_res_holder; 1755 if (!pr_reg) 1756 return sprintf(page, "No SPC-3 Reservation holder\n"); 1757 1758 se_nacl = pr_reg->pr_reg_nacl; 1759 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1760 1761 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", 1762 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1763 se_nacl->initiatorname, i_buf); 1764 } 1765 1766 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, 1767 char *page) 1768 { 1769 struct se_session *sess = dev->reservation_holder; 1770 struct se_node_acl *se_nacl; 1771 ssize_t len; 1772 1773 if (sess) { 1774 se_nacl = sess->se_node_acl; 1775 len = sprintf(page, 1776 "SPC-2 Reservation: %s Initiator: %s\n", 1777 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1778 se_nacl->initiatorname); 1779 } else { 1780 len = sprintf(page, "No SPC-2 Reservation holder\n"); 1781 } 1782 return len; 1783 } 1784 1785 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page) 1786 { 1787 struct se_device *dev = pr_to_dev(item); 1788 int ret; 1789 1790 if (!dev->dev_attrib.emulate_pr) 1791 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 1792 1793 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1794 return sprintf(page, "Passthrough\n"); 1795 1796 spin_lock(&dev->dev_reservation_lock); 1797 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1798 ret = target_core_dev_pr_show_spc2_res(dev, page); 1799 else 1800 ret = target_core_dev_pr_show_spc3_res(dev, page); 1801 spin_unlock(&dev->dev_reservation_lock); 1802 return ret; 1803 } 1804 1805 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item, 1806 char *page) 1807 { 1808 struct se_device *dev = pr_to_dev(item); 1809 ssize_t len = 0; 1810 1811 spin_lock(&dev->dev_reservation_lock); 1812 if (!dev->dev_pr_res_holder) { 1813 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1814 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { 1815 len = sprintf(page, "SPC-3 Reservation: All Target" 1816 " Ports registration\n"); 1817 } else { 1818 len = sprintf(page, "SPC-3 Reservation: Single" 1819 " Target Port registration\n"); 1820 } 1821 1822 spin_unlock(&dev->dev_reservation_lock); 1823 return len; 1824 } 1825 1826 static ssize_t target_pr_res_pr_generation_show(struct config_item *item, 1827 char *page) 1828 { 1829 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation); 1830 } 1831 1832 1833 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item, 1834 char *page) 1835 { 1836 struct se_device *dev = pr_to_dev(item); 1837 struct se_node_acl *se_nacl; 1838 struct se_portal_group *se_tpg; 1839 struct t10_pr_registration *pr_reg; 1840 const struct target_core_fabric_ops *tfo; 1841 ssize_t len = 0; 1842 1843 spin_lock(&dev->dev_reservation_lock); 1844 pr_reg = dev->dev_pr_res_holder; 1845 if (!pr_reg) { 1846 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1847 goto out_unlock; 1848 } 1849 1850 se_nacl = pr_reg->pr_reg_nacl; 1851 se_tpg = se_nacl->se_tpg; 1852 tfo = se_tpg->se_tpg_tfo; 1853 1854 len += sprintf(page+len, "SPC-3 Reservation: %s" 1855 " Target Node Endpoint: %s\n", tfo->fabric_name, 1856 tfo->tpg_get_wwn(se_tpg)); 1857 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1858 " Identifier Tag: %hu %s Portal Group Tag: %hu" 1859 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi, 1860 tfo->fabric_name, tfo->tpg_get_tag(se_tpg), 1861 tfo->fabric_name, pr_reg->pr_aptpl_target_lun); 1862 1863 out_unlock: 1864 spin_unlock(&dev->dev_reservation_lock); 1865 return len; 1866 } 1867 1868 1869 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item, 1870 char *page) 1871 { 1872 struct se_device *dev = pr_to_dev(item); 1873 const struct target_core_fabric_ops *tfo; 1874 struct t10_pr_registration *pr_reg; 1875 unsigned char buf[384]; 1876 char i_buf[PR_REG_ISID_ID_LEN]; 1877 ssize_t len = 0; 1878 int reg_count = 0; 1879 1880 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1881 1882 spin_lock(&dev->t10_pr.registration_lock); 1883 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1884 pr_reg_list) { 1885 1886 memset(buf, 0, 384); 1887 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1888 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1889 core_pr_dump_initiator_port(pr_reg, i_buf, 1890 PR_REG_ISID_ID_LEN); 1891 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1892 tfo->fabric_name, 1893 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, 1894 pr_reg->pr_res_generation); 1895 1896 if (len + strlen(buf) >= PAGE_SIZE) 1897 break; 1898 1899 len += sprintf(page+len, "%s", buf); 1900 reg_count++; 1901 } 1902 spin_unlock(&dev->t10_pr.registration_lock); 1903 1904 if (!reg_count) 1905 len += sprintf(page+len, "None\n"); 1906 1907 return len; 1908 } 1909 1910 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page) 1911 { 1912 struct se_device *dev = pr_to_dev(item); 1913 struct t10_pr_registration *pr_reg; 1914 ssize_t len = 0; 1915 1916 spin_lock(&dev->dev_reservation_lock); 1917 pr_reg = dev->dev_pr_res_holder; 1918 if (pr_reg) { 1919 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1920 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 1921 } else { 1922 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1923 } 1924 1925 spin_unlock(&dev->dev_reservation_lock); 1926 return len; 1927 } 1928 1929 static ssize_t target_pr_res_type_show(struct config_item *item, char *page) 1930 { 1931 struct se_device *dev = pr_to_dev(item); 1932 1933 if (!dev->dev_attrib.emulate_pr) 1934 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 1935 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1936 return sprintf(page, "SPC_PASSTHROUGH\n"); 1937 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1938 return sprintf(page, "SPC2_RESERVATIONS\n"); 1939 1940 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 1941 } 1942 1943 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item, 1944 char *page) 1945 { 1946 struct se_device *dev = pr_to_dev(item); 1947 1948 if (!dev->dev_attrib.emulate_pr || 1949 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 1950 return 0; 1951 1952 return sprintf(page, "APTPL Bit Status: %s\n", 1953 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 1954 } 1955 1956 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item, 1957 char *page) 1958 { 1959 struct se_device *dev = pr_to_dev(item); 1960 1961 if (!dev->dev_attrib.emulate_pr || 1962 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 1963 return 0; 1964 1965 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 1966 } 1967 1968 enum { 1969 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 1970 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 1971 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 1972 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 1973 }; 1974 1975 static match_table_t tokens = { 1976 {Opt_initiator_fabric, "initiator_fabric=%s"}, 1977 {Opt_initiator_node, "initiator_node=%s"}, 1978 {Opt_initiator_sid, "initiator_sid=%s"}, 1979 {Opt_sa_res_key, "sa_res_key=%s"}, 1980 {Opt_res_holder, "res_holder=%d"}, 1981 {Opt_res_type, "res_type=%d"}, 1982 {Opt_res_scope, "res_scope=%d"}, 1983 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 1984 {Opt_mapped_lun, "mapped_lun=%u"}, 1985 {Opt_target_fabric, "target_fabric=%s"}, 1986 {Opt_target_node, "target_node=%s"}, 1987 {Opt_tpgt, "tpgt=%d"}, 1988 {Opt_port_rtpi, "port_rtpi=%d"}, 1989 {Opt_target_lun, "target_lun=%u"}, 1990 {Opt_err, NULL} 1991 }; 1992 1993 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item, 1994 const char *page, size_t count) 1995 { 1996 struct se_device *dev = pr_to_dev(item); 1997 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 1998 unsigned char *t_fabric = NULL, *t_port = NULL; 1999 char *orig, *ptr, *opts; 2000 substring_t args[MAX_OPT_ARGS]; 2001 unsigned long long tmp_ll; 2002 u64 sa_res_key = 0; 2003 u64 mapped_lun = 0, target_lun = 0; 2004 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 2005 u16 tpgt = 0; 2006 u8 type = 0; 2007 2008 if (!dev->dev_attrib.emulate_pr || 2009 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 2010 return count; 2011 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 2012 return count; 2013 2014 if (dev->export_count) { 2015 pr_debug("Unable to process APTPL metadata while" 2016 " active fabric exports exist\n"); 2017 return -EINVAL; 2018 } 2019 2020 opts = kstrdup(page, GFP_KERNEL); 2021 if (!opts) 2022 return -ENOMEM; 2023 2024 orig = opts; 2025 while ((ptr = strsep(&opts, ",\n")) != NULL) { 2026 if (!*ptr) 2027 continue; 2028 2029 token = match_token(ptr, tokens, args); 2030 switch (token) { 2031 case Opt_initiator_fabric: 2032 i_fabric = match_strdup(args); 2033 if (!i_fabric) { 2034 ret = -ENOMEM; 2035 goto out; 2036 } 2037 break; 2038 case Opt_initiator_node: 2039 i_port = match_strdup(args); 2040 if (!i_port) { 2041 ret = -ENOMEM; 2042 goto out; 2043 } 2044 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 2045 pr_err("APTPL metadata initiator_node=" 2046 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 2047 PR_APTPL_MAX_IPORT_LEN); 2048 ret = -EINVAL; 2049 break; 2050 } 2051 break; 2052 case Opt_initiator_sid: 2053 isid = match_strdup(args); 2054 if (!isid) { 2055 ret = -ENOMEM; 2056 goto out; 2057 } 2058 if (strlen(isid) >= PR_REG_ISID_LEN) { 2059 pr_err("APTPL metadata initiator_isid" 2060 "= exceeds PR_REG_ISID_LEN: %d\n", 2061 PR_REG_ISID_LEN); 2062 ret = -EINVAL; 2063 break; 2064 } 2065 break; 2066 case Opt_sa_res_key: 2067 ret = match_u64(args, &tmp_ll); 2068 if (ret < 0) { 2069 pr_err("kstrtoull() failed for sa_res_key=\n"); 2070 goto out; 2071 } 2072 sa_res_key = (u64)tmp_ll; 2073 break; 2074 /* 2075 * PR APTPL Metadata for Reservation 2076 */ 2077 case Opt_res_holder: 2078 ret = match_int(args, &arg); 2079 if (ret) 2080 goto out; 2081 res_holder = arg; 2082 break; 2083 case Opt_res_type: 2084 ret = match_int(args, &arg); 2085 if (ret) 2086 goto out; 2087 type = (u8)arg; 2088 break; 2089 case Opt_res_scope: 2090 ret = match_int(args, &arg); 2091 if (ret) 2092 goto out; 2093 break; 2094 case Opt_res_all_tg_pt: 2095 ret = match_int(args, &arg); 2096 if (ret) 2097 goto out; 2098 all_tg_pt = (int)arg; 2099 break; 2100 case Opt_mapped_lun: 2101 ret = match_u64(args, &tmp_ll); 2102 if (ret) 2103 goto out; 2104 mapped_lun = (u64)tmp_ll; 2105 break; 2106 /* 2107 * PR APTPL Metadata for Target Port 2108 */ 2109 case Opt_target_fabric: 2110 t_fabric = match_strdup(args); 2111 if (!t_fabric) { 2112 ret = -ENOMEM; 2113 goto out; 2114 } 2115 break; 2116 case Opt_target_node: 2117 t_port = match_strdup(args); 2118 if (!t_port) { 2119 ret = -ENOMEM; 2120 goto out; 2121 } 2122 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 2123 pr_err("APTPL metadata target_node=" 2124 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 2125 PR_APTPL_MAX_TPORT_LEN); 2126 ret = -EINVAL; 2127 break; 2128 } 2129 break; 2130 case Opt_tpgt: 2131 ret = match_int(args, &arg); 2132 if (ret) 2133 goto out; 2134 tpgt = (u16)arg; 2135 break; 2136 case Opt_port_rtpi: 2137 ret = match_int(args, &arg); 2138 if (ret) 2139 goto out; 2140 break; 2141 case Opt_target_lun: 2142 ret = match_u64(args, &tmp_ll); 2143 if (ret) 2144 goto out; 2145 target_lun = (u64)tmp_ll; 2146 break; 2147 default: 2148 break; 2149 } 2150 } 2151 2152 if (!i_port || !t_port || !sa_res_key) { 2153 pr_err("Illegal parameters for APTPL registration\n"); 2154 ret = -EINVAL; 2155 goto out; 2156 } 2157 2158 if (res_holder && !(type)) { 2159 pr_err("Illegal PR type: 0x%02x for reservation" 2160 " holder\n", type); 2161 ret = -EINVAL; 2162 goto out; 2163 } 2164 2165 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, 2166 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 2167 res_holder, all_tg_pt, type); 2168 out: 2169 kfree(i_fabric); 2170 kfree(i_port); 2171 kfree(isid); 2172 kfree(t_fabric); 2173 kfree(t_port); 2174 kfree(orig); 2175 return (ret == 0) ? count : ret; 2176 } 2177 2178 2179 CONFIGFS_ATTR_RO(target_pr_, res_holder); 2180 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts); 2181 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation); 2182 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port); 2183 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts); 2184 CONFIGFS_ATTR_RO(target_pr_, res_pr_type); 2185 CONFIGFS_ATTR_RO(target_pr_, res_type); 2186 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active); 2187 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata); 2188 2189 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 2190 &target_pr_attr_res_holder, 2191 &target_pr_attr_res_pr_all_tgt_pts, 2192 &target_pr_attr_res_pr_generation, 2193 &target_pr_attr_res_pr_holder_tg_port, 2194 &target_pr_attr_res_pr_registered_i_pts, 2195 &target_pr_attr_res_pr_type, 2196 &target_pr_attr_res_type, 2197 &target_pr_attr_res_aptpl_active, 2198 &target_pr_attr_res_aptpl_metadata, 2199 NULL, 2200 }; 2201 2202 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs); 2203 2204 /* End functions for struct config_item_type tb_dev_pr_cit */ 2205 2206 /* Start functions for struct config_item_type tb_dev_cit */ 2207 2208 static inline struct se_device *to_device(struct config_item *item) 2209 { 2210 return container_of(to_config_group(item), struct se_device, dev_group); 2211 } 2212 2213 static ssize_t target_dev_info_show(struct config_item *item, char *page) 2214 { 2215 struct se_device *dev = to_device(item); 2216 int bl = 0; 2217 ssize_t read_bytes = 0; 2218 2219 transport_dump_dev_state(dev, page, &bl); 2220 read_bytes += bl; 2221 read_bytes += dev->transport->show_configfs_dev_params(dev, 2222 page+read_bytes); 2223 return read_bytes; 2224 } 2225 2226 static ssize_t target_dev_control_store(struct config_item *item, 2227 const char *page, size_t count) 2228 { 2229 struct se_device *dev = to_device(item); 2230 2231 return dev->transport->set_configfs_dev_params(dev, page, count); 2232 } 2233 2234 static ssize_t target_dev_alias_show(struct config_item *item, char *page) 2235 { 2236 struct se_device *dev = to_device(item); 2237 2238 if (!(dev->dev_flags & DF_USING_ALIAS)) 2239 return 0; 2240 2241 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); 2242 } 2243 2244 static ssize_t target_dev_alias_store(struct config_item *item, 2245 const char *page, size_t count) 2246 { 2247 struct se_device *dev = to_device(item); 2248 struct se_hba *hba = dev->se_hba; 2249 ssize_t read_bytes; 2250 2251 if (count > (SE_DEV_ALIAS_LEN-1)) { 2252 pr_err("alias count: %d exceeds" 2253 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 2254 SE_DEV_ALIAS_LEN-1); 2255 return -EINVAL; 2256 } 2257 2258 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); 2259 if (!read_bytes) 2260 return -EINVAL; 2261 if (dev->dev_alias[read_bytes - 1] == '\n') 2262 dev->dev_alias[read_bytes - 1] = '\0'; 2263 2264 dev->dev_flags |= DF_USING_ALIAS; 2265 2266 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 2267 config_item_name(&hba->hba_group.cg_item), 2268 config_item_name(&dev->dev_group.cg_item), 2269 dev->dev_alias); 2270 2271 return read_bytes; 2272 } 2273 2274 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page) 2275 { 2276 struct se_device *dev = to_device(item); 2277 2278 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) 2279 return 0; 2280 2281 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); 2282 } 2283 2284 static ssize_t target_dev_udev_path_store(struct config_item *item, 2285 const char *page, size_t count) 2286 { 2287 struct se_device *dev = to_device(item); 2288 struct se_hba *hba = dev->se_hba; 2289 ssize_t read_bytes; 2290 2291 if (count > (SE_UDEV_PATH_LEN-1)) { 2292 pr_err("udev_path count: %d exceeds" 2293 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 2294 SE_UDEV_PATH_LEN-1); 2295 return -EINVAL; 2296 } 2297 2298 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, 2299 "%s", page); 2300 if (!read_bytes) 2301 return -EINVAL; 2302 if (dev->udev_path[read_bytes - 1] == '\n') 2303 dev->udev_path[read_bytes - 1] = '\0'; 2304 2305 dev->dev_flags |= DF_USING_UDEV_PATH; 2306 2307 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 2308 config_item_name(&hba->hba_group.cg_item), 2309 config_item_name(&dev->dev_group.cg_item), 2310 dev->udev_path); 2311 2312 return read_bytes; 2313 } 2314 2315 static ssize_t target_dev_enable_show(struct config_item *item, char *page) 2316 { 2317 struct se_device *dev = to_device(item); 2318 2319 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev)); 2320 } 2321 2322 static ssize_t target_dev_enable_store(struct config_item *item, 2323 const char *page, size_t count) 2324 { 2325 struct se_device *dev = to_device(item); 2326 char *ptr; 2327 int ret; 2328 2329 ptr = strstr(page, "1"); 2330 if (!ptr) { 2331 pr_err("For dev_enable ops, only valid value" 2332 " is \"1\"\n"); 2333 return -EINVAL; 2334 } 2335 2336 ret = target_configure_device(dev); 2337 if (ret) 2338 return ret; 2339 return count; 2340 } 2341 2342 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page) 2343 { 2344 struct se_device *dev = to_device(item); 2345 struct config_item *lu_ci; 2346 struct t10_alua_lu_gp *lu_gp; 2347 struct t10_alua_lu_gp_member *lu_gp_mem; 2348 ssize_t len = 0; 2349 2350 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2351 if (!lu_gp_mem) 2352 return 0; 2353 2354 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2355 lu_gp = lu_gp_mem->lu_gp; 2356 if (lu_gp) { 2357 lu_ci = &lu_gp->lu_gp_group.cg_item; 2358 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 2359 config_item_name(lu_ci), lu_gp->lu_gp_id); 2360 } 2361 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2362 2363 return len; 2364 } 2365 2366 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item, 2367 const char *page, size_t count) 2368 { 2369 struct se_device *dev = to_device(item); 2370 struct se_hba *hba = dev->se_hba; 2371 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 2372 struct t10_alua_lu_gp_member *lu_gp_mem; 2373 unsigned char buf[LU_GROUP_NAME_BUF] = { }; 2374 int move = 0; 2375 2376 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2377 if (!lu_gp_mem) 2378 return count; 2379 2380 if (count > LU_GROUP_NAME_BUF) { 2381 pr_err("ALUA LU Group Alias too large!\n"); 2382 return -EINVAL; 2383 } 2384 memcpy(buf, page, count); 2385 /* 2386 * Any ALUA logical unit alias besides "NULL" means we will be 2387 * making a new group association. 2388 */ 2389 if (strcmp(strstrip(buf), "NULL")) { 2390 /* 2391 * core_alua_get_lu_gp_by_name() will increment reference to 2392 * struct t10_alua_lu_gp. This reference is released with 2393 * core_alua_get_lu_gp_by_name below(). 2394 */ 2395 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 2396 if (!lu_gp_new) 2397 return -ENODEV; 2398 } 2399 2400 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2401 lu_gp = lu_gp_mem->lu_gp; 2402 if (lu_gp) { 2403 /* 2404 * Clearing an existing lu_gp association, and replacing 2405 * with NULL 2406 */ 2407 if (!lu_gp_new) { 2408 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 2409 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 2410 " %hu\n", 2411 config_item_name(&hba->hba_group.cg_item), 2412 config_item_name(&dev->dev_group.cg_item), 2413 config_item_name(&lu_gp->lu_gp_group.cg_item), 2414 lu_gp->lu_gp_id); 2415 2416 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2417 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2418 2419 return count; 2420 } 2421 /* 2422 * Removing existing association of lu_gp_mem with lu_gp 2423 */ 2424 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2425 move = 1; 2426 } 2427 /* 2428 * Associate lu_gp_mem with lu_gp_new. 2429 */ 2430 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 2431 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2432 2433 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 2434 " core/alua/lu_gps/%s, ID: %hu\n", 2435 (move) ? "Moving" : "Adding", 2436 config_item_name(&hba->hba_group.cg_item), 2437 config_item_name(&dev->dev_group.cg_item), 2438 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 2439 lu_gp_new->lu_gp_id); 2440 2441 core_alua_put_lu_gp_from_name(lu_gp_new); 2442 return count; 2443 } 2444 2445 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page) 2446 { 2447 struct se_device *dev = to_device(item); 2448 struct t10_alua_lba_map *map; 2449 struct t10_alua_lba_map_member *mem; 2450 char *b = page; 2451 int bl = 0; 2452 char state; 2453 2454 spin_lock(&dev->t10_alua.lba_map_lock); 2455 if (!list_empty(&dev->t10_alua.lba_map_list)) 2456 bl += sprintf(b + bl, "%u %u\n", 2457 dev->t10_alua.lba_map_segment_size, 2458 dev->t10_alua.lba_map_segment_multiplier); 2459 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) { 2460 bl += sprintf(b + bl, "%llu %llu", 2461 map->lba_map_first_lba, map->lba_map_last_lba); 2462 list_for_each_entry(mem, &map->lba_map_mem_list, 2463 lba_map_mem_list) { 2464 switch (mem->lba_map_mem_alua_state) { 2465 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: 2466 state = 'O'; 2467 break; 2468 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: 2469 state = 'A'; 2470 break; 2471 case ALUA_ACCESS_STATE_STANDBY: 2472 state = 'S'; 2473 break; 2474 case ALUA_ACCESS_STATE_UNAVAILABLE: 2475 state = 'U'; 2476 break; 2477 default: 2478 state = '.'; 2479 break; 2480 } 2481 bl += sprintf(b + bl, " %d:%c", 2482 mem->lba_map_mem_alua_pg_id, state); 2483 } 2484 bl += sprintf(b + bl, "\n"); 2485 } 2486 spin_unlock(&dev->t10_alua.lba_map_lock); 2487 return bl; 2488 } 2489 2490 static ssize_t target_dev_lba_map_store(struct config_item *item, 2491 const char *page, size_t count) 2492 { 2493 struct se_device *dev = to_device(item); 2494 struct t10_alua_lba_map *lba_map = NULL; 2495 struct list_head lba_list; 2496 char *map_entries, *orig, *ptr; 2497 char state; 2498 int pg_num = -1, pg; 2499 int ret = 0, num = 0, pg_id, alua_state; 2500 unsigned long start_lba = -1, end_lba = -1; 2501 unsigned long segment_size = -1, segment_mult = -1; 2502 2503 orig = map_entries = kstrdup(page, GFP_KERNEL); 2504 if (!map_entries) 2505 return -ENOMEM; 2506 2507 INIT_LIST_HEAD(&lba_list); 2508 while ((ptr = strsep(&map_entries, "\n")) != NULL) { 2509 if (!*ptr) 2510 continue; 2511 2512 if (num == 0) { 2513 if (sscanf(ptr, "%lu %lu\n", 2514 &segment_size, &segment_mult) != 2) { 2515 pr_err("Invalid line %d\n", num); 2516 ret = -EINVAL; 2517 break; 2518 } 2519 num++; 2520 continue; 2521 } 2522 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) { 2523 pr_err("Invalid line %d\n", num); 2524 ret = -EINVAL; 2525 break; 2526 } 2527 ptr = strchr(ptr, ' '); 2528 if (!ptr) { 2529 pr_err("Invalid line %d, missing end lba\n", num); 2530 ret = -EINVAL; 2531 break; 2532 } 2533 ptr++; 2534 ptr = strchr(ptr, ' '); 2535 if (!ptr) { 2536 pr_err("Invalid line %d, missing state definitions\n", 2537 num); 2538 ret = -EINVAL; 2539 break; 2540 } 2541 ptr++; 2542 lba_map = core_alua_allocate_lba_map(&lba_list, 2543 start_lba, end_lba); 2544 if (IS_ERR(lba_map)) { 2545 ret = PTR_ERR(lba_map); 2546 break; 2547 } 2548 pg = 0; 2549 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) { 2550 switch (state) { 2551 case 'O': 2552 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED; 2553 break; 2554 case 'A': 2555 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED; 2556 break; 2557 case 'S': 2558 alua_state = ALUA_ACCESS_STATE_STANDBY; 2559 break; 2560 case 'U': 2561 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE; 2562 break; 2563 default: 2564 pr_err("Invalid ALUA state '%c'\n", state); 2565 ret = -EINVAL; 2566 goto out; 2567 } 2568 2569 ret = core_alua_allocate_lba_map_mem(lba_map, 2570 pg_id, alua_state); 2571 if (ret) { 2572 pr_err("Invalid target descriptor %d:%c " 2573 "at line %d\n", 2574 pg_id, state, num); 2575 break; 2576 } 2577 pg++; 2578 ptr = strchr(ptr, ' '); 2579 if (ptr) 2580 ptr++; 2581 else 2582 break; 2583 } 2584 if (pg_num == -1) 2585 pg_num = pg; 2586 else if (pg != pg_num) { 2587 pr_err("Only %d from %d port groups definitions " 2588 "at line %d\n", pg, pg_num, num); 2589 ret = -EINVAL; 2590 break; 2591 } 2592 num++; 2593 } 2594 out: 2595 if (ret) { 2596 core_alua_free_lba_map(&lba_list); 2597 count = ret; 2598 } else 2599 core_alua_set_lba_map(dev, &lba_list, 2600 segment_size, segment_mult); 2601 kfree(orig); 2602 return count; 2603 } 2604 2605 CONFIGFS_ATTR_RO(target_dev_, info); 2606 CONFIGFS_ATTR_WO(target_dev_, control); 2607 CONFIGFS_ATTR(target_dev_, alias); 2608 CONFIGFS_ATTR(target_dev_, udev_path); 2609 CONFIGFS_ATTR(target_dev_, enable); 2610 CONFIGFS_ATTR(target_dev_, alua_lu_gp); 2611 CONFIGFS_ATTR(target_dev_, lba_map); 2612 2613 static struct configfs_attribute *target_core_dev_attrs[] = { 2614 &target_dev_attr_info, 2615 &target_dev_attr_control, 2616 &target_dev_attr_alias, 2617 &target_dev_attr_udev_path, 2618 &target_dev_attr_enable, 2619 &target_dev_attr_alua_lu_gp, 2620 &target_dev_attr_lba_map, 2621 NULL, 2622 }; 2623 2624 static void target_core_dev_release(struct config_item *item) 2625 { 2626 struct config_group *dev_cg = to_config_group(item); 2627 struct se_device *dev = 2628 container_of(dev_cg, struct se_device, dev_group); 2629 2630 target_free_device(dev); 2631 } 2632 2633 /* 2634 * Used in target_core_fabric_configfs.c to verify valid se_device symlink 2635 * within target_fabric_port_link() 2636 */ 2637 struct configfs_item_operations target_core_dev_item_ops = { 2638 .release = target_core_dev_release, 2639 }; 2640 2641 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs); 2642 2643 /* End functions for struct config_item_type tb_dev_cit */ 2644 2645 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 2646 2647 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item) 2648 { 2649 return container_of(to_config_group(item), struct t10_alua_lu_gp, 2650 lu_gp_group); 2651 } 2652 2653 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page) 2654 { 2655 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2656 2657 if (!lu_gp->lu_gp_valid_id) 2658 return 0; 2659 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2660 } 2661 2662 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item, 2663 const char *page, size_t count) 2664 { 2665 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2666 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2667 unsigned long lu_gp_id; 2668 int ret; 2669 2670 ret = kstrtoul(page, 0, &lu_gp_id); 2671 if (ret < 0) { 2672 pr_err("kstrtoul() returned %d for" 2673 " lu_gp_id\n", ret); 2674 return ret; 2675 } 2676 if (lu_gp_id > 0x0000ffff) { 2677 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 2678 " 0x0000ffff\n", lu_gp_id); 2679 return -EINVAL; 2680 } 2681 2682 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2683 if (ret < 0) 2684 return -EINVAL; 2685 2686 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 2687 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2688 config_item_name(&alua_lu_gp_cg->cg_item), 2689 lu_gp->lu_gp_id); 2690 2691 return count; 2692 } 2693 2694 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page) 2695 { 2696 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2697 struct se_device *dev; 2698 struct se_hba *hba; 2699 struct t10_alua_lu_gp_member *lu_gp_mem; 2700 ssize_t len = 0, cur_len; 2701 unsigned char buf[LU_GROUP_NAME_BUF] = { }; 2702 2703 spin_lock(&lu_gp->lu_gp_lock); 2704 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2705 dev = lu_gp_mem->lu_gp_mem_dev; 2706 hba = dev->se_hba; 2707 2708 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 2709 config_item_name(&hba->hba_group.cg_item), 2710 config_item_name(&dev->dev_group.cg_item)); 2711 cur_len++; /* Extra byte for NULL terminator */ 2712 2713 if ((cur_len + len) > PAGE_SIZE) { 2714 pr_warn("Ran out of lu_gp_show_attr" 2715 "_members buffer\n"); 2716 break; 2717 } 2718 memcpy(page+len, buf, cur_len); 2719 len += cur_len; 2720 } 2721 spin_unlock(&lu_gp->lu_gp_lock); 2722 2723 return len; 2724 } 2725 2726 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id); 2727 CONFIGFS_ATTR_RO(target_lu_gp_, members); 2728 2729 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2730 &target_lu_gp_attr_lu_gp_id, 2731 &target_lu_gp_attr_members, 2732 NULL, 2733 }; 2734 2735 static void target_core_alua_lu_gp_release(struct config_item *item) 2736 { 2737 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2738 struct t10_alua_lu_gp, lu_gp_group); 2739 2740 core_alua_free_lu_gp(lu_gp); 2741 } 2742 2743 static struct configfs_item_operations target_core_alua_lu_gp_ops = { 2744 .release = target_core_alua_lu_gp_release, 2745 }; 2746 2747 static const struct config_item_type target_core_alua_lu_gp_cit = { 2748 .ct_item_ops = &target_core_alua_lu_gp_ops, 2749 .ct_attrs = target_core_alua_lu_gp_attrs, 2750 .ct_owner = THIS_MODULE, 2751 }; 2752 2753 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2754 2755 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2756 2757 static struct config_group *target_core_alua_create_lu_gp( 2758 struct config_group *group, 2759 const char *name) 2760 { 2761 struct t10_alua_lu_gp *lu_gp; 2762 struct config_group *alua_lu_gp_cg = NULL; 2763 struct config_item *alua_lu_gp_ci = NULL; 2764 2765 lu_gp = core_alua_allocate_lu_gp(name, 0); 2766 if (IS_ERR(lu_gp)) 2767 return NULL; 2768 2769 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2770 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2771 2772 config_group_init_type_name(alua_lu_gp_cg, name, 2773 &target_core_alua_lu_gp_cit); 2774 2775 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2776 " Group: core/alua/lu_gps/%s\n", 2777 config_item_name(alua_lu_gp_ci)); 2778 2779 return alua_lu_gp_cg; 2780 2781 } 2782 2783 static void target_core_alua_drop_lu_gp( 2784 struct config_group *group, 2785 struct config_item *item) 2786 { 2787 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2788 struct t10_alua_lu_gp, lu_gp_group); 2789 2790 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2791 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2792 config_item_name(item), lu_gp->lu_gp_id); 2793 /* 2794 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 2795 * -> target_core_alua_lu_gp_release() 2796 */ 2797 config_item_put(item); 2798 } 2799 2800 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2801 .make_group = &target_core_alua_create_lu_gp, 2802 .drop_item = &target_core_alua_drop_lu_gp, 2803 }; 2804 2805 static const struct config_item_type target_core_alua_lu_gps_cit = { 2806 .ct_item_ops = NULL, 2807 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2808 .ct_owner = THIS_MODULE, 2809 }; 2810 2811 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2812 2813 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2814 2815 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item) 2816 { 2817 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp, 2818 tg_pt_gp_group); 2819 } 2820 2821 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item, 2822 char *page) 2823 { 2824 return sprintf(page, "%d\n", 2825 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state); 2826 } 2827 2828 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item, 2829 const char *page, size_t count) 2830 { 2831 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2832 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; 2833 unsigned long tmp; 2834 int new_state, ret; 2835 2836 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2837 pr_err("Unable to do implicit ALUA on invalid tg_pt_gp ID\n"); 2838 return -EINVAL; 2839 } 2840 if (!target_dev_configured(dev)) { 2841 pr_err("Unable to set alua_access_state while device is" 2842 " not configured\n"); 2843 return -ENODEV; 2844 } 2845 2846 ret = kstrtoul(page, 0, &tmp); 2847 if (ret < 0) { 2848 pr_err("Unable to extract new ALUA access state from" 2849 " %s\n", page); 2850 return ret; 2851 } 2852 new_state = (int)tmp; 2853 2854 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) { 2855 pr_err("Unable to process implicit configfs ALUA" 2856 " transition while TPGS_IMPLICIT_ALUA is disabled\n"); 2857 return -EINVAL; 2858 } 2859 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA && 2860 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) { 2861 /* LBA DEPENDENT is only allowed with implicit ALUA */ 2862 pr_err("Unable to process implicit configfs ALUA transition" 2863 " while explicit ALUA management is enabled\n"); 2864 return -EINVAL; 2865 } 2866 2867 ret = core_alua_do_port_transition(tg_pt_gp, dev, 2868 NULL, NULL, new_state, 0); 2869 return (!ret) ? count : -EINVAL; 2870 } 2871 2872 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item, 2873 char *page) 2874 { 2875 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2876 return sprintf(page, "%s\n", 2877 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2878 } 2879 2880 static ssize_t target_tg_pt_gp_alua_access_status_store( 2881 struct config_item *item, const char *page, size_t count) 2882 { 2883 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2884 unsigned long tmp; 2885 int new_status, ret; 2886 2887 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2888 pr_err("Unable to set ALUA access status on invalid tg_pt_gp ID\n"); 2889 return -EINVAL; 2890 } 2891 2892 ret = kstrtoul(page, 0, &tmp); 2893 if (ret < 0) { 2894 pr_err("Unable to extract new ALUA access status" 2895 " from %s\n", page); 2896 return ret; 2897 } 2898 new_status = (int)tmp; 2899 2900 if ((new_status != ALUA_STATUS_NONE) && 2901 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && 2902 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { 2903 pr_err("Illegal ALUA access status: 0x%02x\n", 2904 new_status); 2905 return -EINVAL; 2906 } 2907 2908 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2909 return count; 2910 } 2911 2912 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item, 2913 char *page) 2914 { 2915 return core_alua_show_access_type(to_tg_pt_gp(item), page); 2916 } 2917 2918 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item, 2919 const char *page, size_t count) 2920 { 2921 return core_alua_store_access_type(to_tg_pt_gp(item), page, count); 2922 } 2923 2924 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \ 2925 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \ 2926 struct config_item *item, char *p) \ 2927 { \ 2928 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 2929 return sprintf(p, "%d\n", \ 2930 !!(t->tg_pt_gp_alua_supported_states & _bit)); \ 2931 } \ 2932 \ 2933 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \ 2934 struct config_item *item, const char *p, size_t c) \ 2935 { \ 2936 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 2937 unsigned long tmp; \ 2938 int ret; \ 2939 \ 2940 if (!t->tg_pt_gp_valid_id) { \ 2941 pr_err("Unable to set " #_name " ALUA state on invalid tg_pt_gp ID\n"); \ 2942 return -EINVAL; \ 2943 } \ 2944 \ 2945 ret = kstrtoul(p, 0, &tmp); \ 2946 if (ret < 0) { \ 2947 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \ 2948 return -EINVAL; \ 2949 } \ 2950 if (tmp > 1) { \ 2951 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \ 2952 return -EINVAL; \ 2953 } \ 2954 if (tmp) \ 2955 t->tg_pt_gp_alua_supported_states |= _bit; \ 2956 else \ 2957 t->tg_pt_gp_alua_supported_states &= ~_bit; \ 2958 \ 2959 return c; \ 2960 } 2961 2962 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP); 2963 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP); 2964 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP); 2965 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP); 2966 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP); 2967 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP); 2968 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP); 2969 2970 static ssize_t target_tg_pt_gp_alua_write_metadata_show( 2971 struct config_item *item, char *page) 2972 { 2973 return sprintf(page, "%d\n", 2974 to_tg_pt_gp(item)->tg_pt_gp_write_metadata); 2975 } 2976 2977 static ssize_t target_tg_pt_gp_alua_write_metadata_store( 2978 struct config_item *item, const char *page, size_t count) 2979 { 2980 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2981 unsigned long tmp; 2982 int ret; 2983 2984 ret = kstrtoul(page, 0, &tmp); 2985 if (ret < 0) { 2986 pr_err("Unable to extract alua_write_metadata\n"); 2987 return ret; 2988 } 2989 2990 if ((tmp != 0) && (tmp != 1)) { 2991 pr_err("Illegal value for alua_write_metadata:" 2992 " %lu\n", tmp); 2993 return -EINVAL; 2994 } 2995 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 2996 2997 return count; 2998 } 2999 3000 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item, 3001 char *page) 3002 { 3003 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page); 3004 } 3005 3006 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item, 3007 const char *page, size_t count) 3008 { 3009 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page, 3010 count); 3011 } 3012 3013 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item, 3014 char *page) 3015 { 3016 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page); 3017 } 3018 3019 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item, 3020 const char *page, size_t count) 3021 { 3022 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page, 3023 count); 3024 } 3025 3026 static ssize_t target_tg_pt_gp_implicit_trans_secs_show( 3027 struct config_item *item, char *page) 3028 { 3029 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page); 3030 } 3031 3032 static ssize_t target_tg_pt_gp_implicit_trans_secs_store( 3033 struct config_item *item, const char *page, size_t count) 3034 { 3035 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page, 3036 count); 3037 } 3038 3039 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item, 3040 char *page) 3041 { 3042 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page); 3043 } 3044 3045 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item, 3046 const char *page, size_t count) 3047 { 3048 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count); 3049 } 3050 3051 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item, 3052 char *page) 3053 { 3054 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3055 3056 if (!tg_pt_gp->tg_pt_gp_valid_id) 3057 return 0; 3058 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 3059 } 3060 3061 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item, 3062 const char *page, size_t count) 3063 { 3064 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3065 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 3066 unsigned long tg_pt_gp_id; 3067 int ret; 3068 3069 ret = kstrtoul(page, 0, &tg_pt_gp_id); 3070 if (ret < 0) { 3071 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n", 3072 page); 3073 return ret; 3074 } 3075 if (tg_pt_gp_id > 0x0000ffff) { 3076 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n", 3077 tg_pt_gp_id); 3078 return -EINVAL; 3079 } 3080 3081 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 3082 if (ret < 0) 3083 return -EINVAL; 3084 3085 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 3086 "core/alua/tg_pt_gps/%s to ID: %hu\n", 3087 config_item_name(&alua_tg_pt_gp_cg->cg_item), 3088 tg_pt_gp->tg_pt_gp_id); 3089 3090 return count; 3091 } 3092 3093 static ssize_t target_tg_pt_gp_members_show(struct config_item *item, 3094 char *page) 3095 { 3096 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3097 struct se_lun *lun; 3098 ssize_t len = 0, cur_len; 3099 unsigned char buf[TG_PT_GROUP_NAME_BUF] = { }; 3100 3101 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 3102 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, 3103 lun_tg_pt_gp_link) { 3104 struct se_portal_group *tpg = lun->lun_tpg; 3105 3106 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 3107 "/%s\n", tpg->se_tpg_tfo->fabric_name, 3108 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 3109 tpg->se_tpg_tfo->tpg_get_tag(tpg), 3110 config_item_name(&lun->lun_group.cg_item)); 3111 cur_len++; /* Extra byte for NULL terminator */ 3112 3113 if ((cur_len + len) > PAGE_SIZE) { 3114 pr_warn("Ran out of lu_gp_show_attr" 3115 "_members buffer\n"); 3116 break; 3117 } 3118 memcpy(page+len, buf, cur_len); 3119 len += cur_len; 3120 } 3121 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 3122 3123 return len; 3124 } 3125 3126 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state); 3127 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status); 3128 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type); 3129 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning); 3130 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline); 3131 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent); 3132 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable); 3133 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby); 3134 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized); 3135 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized); 3136 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata); 3137 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs); 3138 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs); 3139 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs); 3140 CONFIGFS_ATTR(target_tg_pt_gp_, preferred); 3141 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id); 3142 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members); 3143 3144 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 3145 &target_tg_pt_gp_attr_alua_access_state, 3146 &target_tg_pt_gp_attr_alua_access_status, 3147 &target_tg_pt_gp_attr_alua_access_type, 3148 &target_tg_pt_gp_attr_alua_support_transitioning, 3149 &target_tg_pt_gp_attr_alua_support_offline, 3150 &target_tg_pt_gp_attr_alua_support_lba_dependent, 3151 &target_tg_pt_gp_attr_alua_support_unavailable, 3152 &target_tg_pt_gp_attr_alua_support_standby, 3153 &target_tg_pt_gp_attr_alua_support_active_nonoptimized, 3154 &target_tg_pt_gp_attr_alua_support_active_optimized, 3155 &target_tg_pt_gp_attr_alua_write_metadata, 3156 &target_tg_pt_gp_attr_nonop_delay_msecs, 3157 &target_tg_pt_gp_attr_trans_delay_msecs, 3158 &target_tg_pt_gp_attr_implicit_trans_secs, 3159 &target_tg_pt_gp_attr_preferred, 3160 &target_tg_pt_gp_attr_tg_pt_gp_id, 3161 &target_tg_pt_gp_attr_members, 3162 NULL, 3163 }; 3164 3165 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 3166 { 3167 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3168 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3169 3170 core_alua_free_tg_pt_gp(tg_pt_gp); 3171 } 3172 3173 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 3174 .release = target_core_alua_tg_pt_gp_release, 3175 }; 3176 3177 static const struct config_item_type target_core_alua_tg_pt_gp_cit = { 3178 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 3179 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 3180 .ct_owner = THIS_MODULE, 3181 }; 3182 3183 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 3184 3185 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3186 3187 static struct config_group *target_core_alua_create_tg_pt_gp( 3188 struct config_group *group, 3189 const char *name) 3190 { 3191 struct t10_alua *alua = container_of(group, struct t10_alua, 3192 alua_tg_pt_gps_group); 3193 struct t10_alua_tg_pt_gp *tg_pt_gp; 3194 struct config_group *alua_tg_pt_gp_cg = NULL; 3195 struct config_item *alua_tg_pt_gp_ci = NULL; 3196 3197 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0); 3198 if (!tg_pt_gp) 3199 return NULL; 3200 3201 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 3202 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 3203 3204 config_group_init_type_name(alua_tg_pt_gp_cg, name, 3205 &target_core_alua_tg_pt_gp_cit); 3206 3207 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 3208 " Group: alua/tg_pt_gps/%s\n", 3209 config_item_name(alua_tg_pt_gp_ci)); 3210 3211 return alua_tg_pt_gp_cg; 3212 } 3213 3214 static void target_core_alua_drop_tg_pt_gp( 3215 struct config_group *group, 3216 struct config_item *item) 3217 { 3218 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3219 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3220 3221 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 3222 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 3223 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 3224 /* 3225 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 3226 * -> target_core_alua_tg_pt_gp_release(). 3227 */ 3228 config_item_put(item); 3229 } 3230 3231 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 3232 .make_group = &target_core_alua_create_tg_pt_gp, 3233 .drop_item = &target_core_alua_drop_tg_pt_gp, 3234 }; 3235 3236 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL); 3237 3238 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3239 3240 /* Start functions for struct config_item_type target_core_alua_cit */ 3241 3242 /* 3243 * target_core_alua_cit is a ConfigFS group that lives under 3244 * /sys/kernel/config/target/core/alua. There are default groups 3245 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 3246 * target_core_alua_cit in target_core_init_configfs() below. 3247 */ 3248 static const struct config_item_type target_core_alua_cit = { 3249 .ct_item_ops = NULL, 3250 .ct_attrs = NULL, 3251 .ct_owner = THIS_MODULE, 3252 }; 3253 3254 /* End functions for struct config_item_type target_core_alua_cit */ 3255 3256 /* Start functions for struct config_item_type tb_dev_stat_cit */ 3257 3258 static struct config_group *target_core_stat_mkdir( 3259 struct config_group *group, 3260 const char *name) 3261 { 3262 return ERR_PTR(-ENOSYS); 3263 } 3264 3265 static void target_core_stat_rmdir( 3266 struct config_group *group, 3267 struct config_item *item) 3268 { 3269 return; 3270 } 3271 3272 static struct configfs_group_operations target_core_stat_group_ops = { 3273 .make_group = &target_core_stat_mkdir, 3274 .drop_item = &target_core_stat_rmdir, 3275 }; 3276 3277 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL); 3278 3279 /* End functions for struct config_item_type tb_dev_stat_cit */ 3280 3281 /* Start functions for struct config_item_type target_core_hba_cit */ 3282 3283 static struct config_group *target_core_make_subdev( 3284 struct config_group *group, 3285 const char *name) 3286 { 3287 struct t10_alua_tg_pt_gp *tg_pt_gp; 3288 struct config_item *hba_ci = &group->cg_item; 3289 struct se_hba *hba = item_to_hba(hba_ci); 3290 struct target_backend *tb = hba->backend; 3291 struct se_device *dev; 3292 int errno = -ENOMEM, ret; 3293 3294 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 3295 if (ret) 3296 return ERR_PTR(ret); 3297 3298 dev = target_alloc_device(hba, name); 3299 if (!dev) 3300 goto out_unlock; 3301 3302 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit); 3303 3304 config_group_init_type_name(&dev->dev_action_group, "action", 3305 &tb->tb_dev_action_cit); 3306 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group); 3307 3308 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib", 3309 &tb->tb_dev_attrib_cit); 3310 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group); 3311 3312 config_group_init_type_name(&dev->dev_pr_group, "pr", 3313 &tb->tb_dev_pr_cit); 3314 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group); 3315 3316 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn", 3317 &tb->tb_dev_wwn_cit); 3318 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group, 3319 &dev->dev_group); 3320 3321 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group, 3322 "alua", &tb->tb_dev_alua_tg_pt_gps_cit); 3323 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group, 3324 &dev->dev_group); 3325 3326 config_group_init_type_name(&dev->dev_stat_grps.stat_group, 3327 "statistics", &tb->tb_dev_stat_cit); 3328 configfs_add_default_group(&dev->dev_stat_grps.stat_group, 3329 &dev->dev_group); 3330 3331 /* 3332 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 3333 */ 3334 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1); 3335 if (!tg_pt_gp) 3336 goto out_free_device; 3337 dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 3338 3339 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 3340 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 3341 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group, 3342 &dev->t10_alua.alua_tg_pt_gps_group); 3343 3344 /* 3345 * Add core/$HBA/$DEV/statistics/ default groups 3346 */ 3347 target_stat_setup_dev_default_groups(dev); 3348 3349 mutex_lock(&target_devices_lock); 3350 target_devices++; 3351 mutex_unlock(&target_devices_lock); 3352 3353 mutex_unlock(&hba->hba_access_mutex); 3354 return &dev->dev_group; 3355 3356 out_free_device: 3357 target_free_device(dev); 3358 out_unlock: 3359 mutex_unlock(&hba->hba_access_mutex); 3360 return ERR_PTR(errno); 3361 } 3362 3363 static void target_core_drop_subdev( 3364 struct config_group *group, 3365 struct config_item *item) 3366 { 3367 struct config_group *dev_cg = to_config_group(item); 3368 struct se_device *dev = 3369 container_of(dev_cg, struct se_device, dev_group); 3370 struct se_hba *hba; 3371 3372 hba = item_to_hba(&dev->se_hba->hba_group.cg_item); 3373 3374 mutex_lock(&hba->hba_access_mutex); 3375 3376 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group); 3377 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group); 3378 3379 /* 3380 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 3381 * directly from target_core_alua_tg_pt_gp_release(). 3382 */ 3383 dev->t10_alua.default_tg_pt_gp = NULL; 3384 3385 configfs_remove_default_groups(dev_cg); 3386 3387 /* 3388 * se_dev is released from target_core_dev_item_ops->release() 3389 */ 3390 config_item_put(item); 3391 3392 mutex_lock(&target_devices_lock); 3393 target_devices--; 3394 mutex_unlock(&target_devices_lock); 3395 3396 mutex_unlock(&hba->hba_access_mutex); 3397 } 3398 3399 static struct configfs_group_operations target_core_hba_group_ops = { 3400 .make_group = target_core_make_subdev, 3401 .drop_item = target_core_drop_subdev, 3402 }; 3403 3404 3405 static inline struct se_hba *to_hba(struct config_item *item) 3406 { 3407 return container_of(to_config_group(item), struct se_hba, hba_group); 3408 } 3409 3410 static ssize_t target_hba_info_show(struct config_item *item, char *page) 3411 { 3412 struct se_hba *hba = to_hba(item); 3413 3414 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 3415 hba->hba_id, hba->backend->ops->name, 3416 TARGET_CORE_VERSION); 3417 } 3418 3419 static ssize_t target_hba_mode_show(struct config_item *item, char *page) 3420 { 3421 struct se_hba *hba = to_hba(item); 3422 int hba_mode = 0; 3423 3424 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 3425 hba_mode = 1; 3426 3427 return sprintf(page, "%d\n", hba_mode); 3428 } 3429 3430 static ssize_t target_hba_mode_store(struct config_item *item, 3431 const char *page, size_t count) 3432 { 3433 struct se_hba *hba = to_hba(item); 3434 unsigned long mode_flag; 3435 int ret; 3436 3437 if (hba->backend->ops->pmode_enable_hba == NULL) 3438 return -EINVAL; 3439 3440 ret = kstrtoul(page, 0, &mode_flag); 3441 if (ret < 0) { 3442 pr_err("Unable to extract hba mode flag: %d\n", ret); 3443 return ret; 3444 } 3445 3446 if (hba->dev_count) { 3447 pr_err("Unable to set hba_mode with active devices\n"); 3448 return -EINVAL; 3449 } 3450 3451 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag); 3452 if (ret < 0) 3453 return -EINVAL; 3454 if (ret > 0) 3455 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 3456 else if (ret == 0) 3457 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 3458 3459 return count; 3460 } 3461 3462 CONFIGFS_ATTR_RO(target_, hba_info); 3463 CONFIGFS_ATTR(target_, hba_mode); 3464 3465 static void target_core_hba_release(struct config_item *item) 3466 { 3467 struct se_hba *hba = container_of(to_config_group(item), 3468 struct se_hba, hba_group); 3469 core_delete_hba(hba); 3470 } 3471 3472 static struct configfs_attribute *target_core_hba_attrs[] = { 3473 &target_attr_hba_info, 3474 &target_attr_hba_mode, 3475 NULL, 3476 }; 3477 3478 static struct configfs_item_operations target_core_hba_item_ops = { 3479 .release = target_core_hba_release, 3480 }; 3481 3482 static const struct config_item_type target_core_hba_cit = { 3483 .ct_item_ops = &target_core_hba_item_ops, 3484 .ct_group_ops = &target_core_hba_group_ops, 3485 .ct_attrs = target_core_hba_attrs, 3486 .ct_owner = THIS_MODULE, 3487 }; 3488 3489 static struct config_group *target_core_call_addhbatotarget( 3490 struct config_group *group, 3491 const char *name) 3492 { 3493 char *se_plugin_str, *str, *str2; 3494 struct se_hba *hba; 3495 char buf[TARGET_CORE_NAME_MAX_LEN] = { }; 3496 unsigned long plugin_dep_id = 0; 3497 int ret; 3498 3499 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 3500 pr_err("Passed *name strlen(): %d exceeds" 3501 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 3502 TARGET_CORE_NAME_MAX_LEN); 3503 return ERR_PTR(-ENAMETOOLONG); 3504 } 3505 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 3506 3507 str = strstr(buf, "_"); 3508 if (!str) { 3509 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 3510 return ERR_PTR(-EINVAL); 3511 } 3512 se_plugin_str = buf; 3513 /* 3514 * Special case for subsystem plugins that have "_" in their names. 3515 * Namely rd_direct and rd_mcp.. 3516 */ 3517 str2 = strstr(str+1, "_"); 3518 if (str2) { 3519 *str2 = '\0'; /* Terminate for *se_plugin_str */ 3520 str2++; /* Skip to start of plugin dependent ID */ 3521 str = str2; 3522 } else { 3523 *str = '\0'; /* Terminate for *se_plugin_str */ 3524 str++; /* Skip to start of plugin dependent ID */ 3525 } 3526 3527 ret = kstrtoul(str, 0, &plugin_dep_id); 3528 if (ret < 0) { 3529 pr_err("kstrtoul() returned %d for" 3530 " plugin_dep_id\n", ret); 3531 return ERR_PTR(ret); 3532 } 3533 /* 3534 * Load up TCM subsystem plugins if they have not already been loaded. 3535 */ 3536 transport_subsystem_check_init(); 3537 3538 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 3539 if (IS_ERR(hba)) 3540 return ERR_CAST(hba); 3541 3542 config_group_init_type_name(&hba->hba_group, name, 3543 &target_core_hba_cit); 3544 3545 return &hba->hba_group; 3546 } 3547 3548 static void target_core_call_delhbafromtarget( 3549 struct config_group *group, 3550 struct config_item *item) 3551 { 3552 /* 3553 * core_delete_hba() is called from target_core_hba_item_ops->release() 3554 * -> target_core_hba_release() 3555 */ 3556 config_item_put(item); 3557 } 3558 3559 static struct configfs_group_operations target_core_group_ops = { 3560 .make_group = target_core_call_addhbatotarget, 3561 .drop_item = target_core_call_delhbafromtarget, 3562 }; 3563 3564 static const struct config_item_type target_core_cit = { 3565 .ct_item_ops = NULL, 3566 .ct_group_ops = &target_core_group_ops, 3567 .ct_attrs = NULL, 3568 .ct_owner = THIS_MODULE, 3569 }; 3570 3571 /* Stop functions for struct config_item_type target_core_hba_cit */ 3572 3573 void target_setup_backend_cits(struct target_backend *tb) 3574 { 3575 target_core_setup_dev_cit(tb); 3576 target_core_setup_dev_action_cit(tb); 3577 target_core_setup_dev_attrib_cit(tb); 3578 target_core_setup_dev_pr_cit(tb); 3579 target_core_setup_dev_wwn_cit(tb); 3580 target_core_setup_dev_alua_tg_pt_gps_cit(tb); 3581 target_core_setup_dev_stat_cit(tb); 3582 } 3583 3584 static void target_init_dbroot(void) 3585 { 3586 struct file *fp; 3587 3588 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED); 3589 fp = filp_open(db_root_stage, O_RDONLY, 0); 3590 if (IS_ERR(fp)) { 3591 pr_err("db_root: cannot open: %s\n", db_root_stage); 3592 return; 3593 } 3594 if (!S_ISDIR(file_inode(fp)->i_mode)) { 3595 filp_close(fp, NULL); 3596 pr_err("db_root: not a valid directory: %s\n", db_root_stage); 3597 return; 3598 } 3599 filp_close(fp, NULL); 3600 3601 strncpy(db_root, db_root_stage, DB_ROOT_LEN); 3602 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); 3603 } 3604 3605 static int __init target_core_init_configfs(void) 3606 { 3607 struct configfs_subsystem *subsys = &target_core_fabrics; 3608 struct t10_alua_lu_gp *lu_gp; 3609 int ret; 3610 3611 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 3612 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3613 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3614 3615 config_group_init(&subsys->su_group); 3616 mutex_init(&subsys->su_mutex); 3617 3618 ret = init_se_kmem_caches(); 3619 if (ret < 0) 3620 return ret; 3621 /* 3622 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3623 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3624 */ 3625 config_group_init_type_name(&target_core_hbagroup, "core", 3626 &target_core_cit); 3627 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group); 3628 3629 /* 3630 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3631 */ 3632 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit); 3633 configfs_add_default_group(&alua_group, &target_core_hbagroup); 3634 3635 /* 3636 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3637 * groups under /sys/kernel/config/target/core/alua/ 3638 */ 3639 config_group_init_type_name(&alua_lu_gps_group, "lu_gps", 3640 &target_core_alua_lu_gps_cit); 3641 configfs_add_default_group(&alua_lu_gps_group, &alua_group); 3642 3643 /* 3644 * Add core/alua/lu_gps/default_lu_gp 3645 */ 3646 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3647 if (IS_ERR(lu_gp)) { 3648 ret = -ENOMEM; 3649 goto out_global; 3650 } 3651 3652 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3653 &target_core_alua_lu_gp_cit); 3654 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group); 3655 3656 default_lu_gp = lu_gp; 3657 3658 /* 3659 * Register the target_core_mod subsystem with configfs. 3660 */ 3661 ret = configfs_register_subsystem(subsys); 3662 if (ret < 0) { 3663 pr_err("Error %d while registering subsystem %s\n", 3664 ret, subsys->su_group.cg_item.ci_namebuf); 3665 goto out_global; 3666 } 3667 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 3668 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s" 3669 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3670 /* 3671 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3672 */ 3673 ret = rd_module_init(); 3674 if (ret < 0) 3675 goto out; 3676 3677 ret = core_dev_setup_virtual_lun0(); 3678 if (ret < 0) 3679 goto out; 3680 3681 ret = target_xcopy_setup_pt(); 3682 if (ret < 0) 3683 goto out; 3684 3685 target_init_dbroot(); 3686 3687 return 0; 3688 3689 out: 3690 configfs_unregister_subsystem(subsys); 3691 core_dev_release_virtual_lun0(); 3692 rd_module_exit(); 3693 out_global: 3694 if (default_lu_gp) { 3695 core_alua_free_lu_gp(default_lu_gp); 3696 default_lu_gp = NULL; 3697 } 3698 release_se_kmem_caches(); 3699 return ret; 3700 } 3701 3702 static void __exit target_core_exit_configfs(void) 3703 { 3704 configfs_remove_default_groups(&alua_lu_gps_group); 3705 configfs_remove_default_groups(&alua_group); 3706 configfs_remove_default_groups(&target_core_hbagroup); 3707 3708 /* 3709 * We expect subsys->su_group.default_groups to be released 3710 * by configfs subsystem provider logic.. 3711 */ 3712 configfs_unregister_subsystem(&target_core_fabrics); 3713 3714 core_alua_free_lu_gp(default_lu_gp); 3715 default_lu_gp = NULL; 3716 3717 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3718 " Infrastructure\n"); 3719 3720 core_dev_release_virtual_lun0(); 3721 rd_module_exit(); 3722 target_xcopy_release_pt(); 3723 release_se_kmem_caches(); 3724 } 3725 3726 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3727 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3728 MODULE_LICENSE("GPL"); 3729 3730 module_init(target_core_init_configfs); 3731 module_exit(target_core_exit_configfs); 3732