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 static int target_disable_feature(struct se_portal_group *se_tpg) 339 { 340 return 0; 341 } 342 343 static u32 target_default_get_inst_index(struct se_portal_group *se_tpg) 344 { 345 return 1; 346 } 347 348 static u32 target_default_sess_get_index(struct se_session *se_sess) 349 { 350 return 0; 351 } 352 353 static void target_set_default_node_attributes(struct se_node_acl *se_acl) 354 { 355 } 356 357 static int target_default_get_cmd_state(struct se_cmd *se_cmd) 358 { 359 return 0; 360 } 361 362 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo) 363 { 364 if (tfo->fabric_alias) { 365 if (strlen(tfo->fabric_alias) >= TARGET_FABRIC_NAME_SIZE) { 366 pr_err("Passed alias: %s exceeds " 367 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_alias); 368 return -EINVAL; 369 } 370 } 371 if (!tfo->fabric_name) { 372 pr_err("Missing tfo->fabric_name\n"); 373 return -EINVAL; 374 } 375 if (strlen(tfo->fabric_name) >= TARGET_FABRIC_NAME_SIZE) { 376 pr_err("Passed name: %s exceeds " 377 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_name); 378 return -EINVAL; 379 } 380 if (!tfo->tpg_get_wwn) { 381 pr_err("Missing tfo->tpg_get_wwn()\n"); 382 return -EINVAL; 383 } 384 if (!tfo->tpg_get_tag) { 385 pr_err("Missing tfo->tpg_get_tag()\n"); 386 return -EINVAL; 387 } 388 if (!tfo->release_cmd) { 389 pr_err("Missing tfo->release_cmd()\n"); 390 return -EINVAL; 391 } 392 if (!tfo->write_pending) { 393 pr_err("Missing tfo->write_pending()\n"); 394 return -EINVAL; 395 } 396 if (!tfo->queue_data_in) { 397 pr_err("Missing tfo->queue_data_in()\n"); 398 return -EINVAL; 399 } 400 if (!tfo->queue_status) { 401 pr_err("Missing tfo->queue_status()\n"); 402 return -EINVAL; 403 } 404 if (!tfo->queue_tm_rsp) { 405 pr_err("Missing tfo->queue_tm_rsp()\n"); 406 return -EINVAL; 407 } 408 if (!tfo->aborted_task) { 409 pr_err("Missing tfo->aborted_task()\n"); 410 return -EINVAL; 411 } 412 if (!tfo->check_stop_free) { 413 pr_err("Missing tfo->check_stop_free()\n"); 414 return -EINVAL; 415 } 416 /* 417 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn() 418 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in 419 * target_core_fabric_configfs.c WWN+TPG group context code. 420 */ 421 if (!tfo->fabric_make_wwn) { 422 pr_err("Missing tfo->fabric_make_wwn()\n"); 423 return -EINVAL; 424 } 425 if (!tfo->fabric_drop_wwn) { 426 pr_err("Missing tfo->fabric_drop_wwn()\n"); 427 return -EINVAL; 428 } 429 if (!tfo->fabric_make_tpg) { 430 pr_err("Missing tfo->fabric_make_tpg()\n"); 431 return -EINVAL; 432 } 433 if (!tfo->fabric_drop_tpg) { 434 pr_err("Missing tfo->fabric_drop_tpg()\n"); 435 return -EINVAL; 436 } 437 438 return 0; 439 } 440 441 static void target_set_default_ops(struct target_core_fabric_ops *tfo) 442 { 443 if (!tfo->tpg_check_demo_mode) 444 tfo->tpg_check_demo_mode = target_disable_feature; 445 446 if (!tfo->tpg_check_demo_mode_cache) 447 tfo->tpg_check_demo_mode_cache = target_disable_feature; 448 449 if (!tfo->tpg_check_demo_mode_write_protect) 450 tfo->tpg_check_demo_mode_write_protect = target_disable_feature; 451 452 if (!tfo->tpg_check_prod_mode_write_protect) 453 tfo->tpg_check_prod_mode_write_protect = target_disable_feature; 454 455 if (!tfo->tpg_get_inst_index) 456 tfo->tpg_get_inst_index = target_default_get_inst_index; 457 458 if (!tfo->sess_get_index) 459 tfo->sess_get_index = target_default_sess_get_index; 460 461 if (!tfo->set_default_node_attributes) 462 tfo->set_default_node_attributes = target_set_default_node_attributes; 463 464 if (!tfo->get_cmd_state) 465 tfo->get_cmd_state = target_default_get_cmd_state; 466 } 467 468 int target_register_template(const struct target_core_fabric_ops *fo) 469 { 470 struct target_core_fabric_ops *tfo; 471 struct target_fabric_configfs *tf; 472 int ret; 473 474 ret = target_fabric_tf_ops_check(fo); 475 if (ret) 476 return ret; 477 478 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL); 479 if (!tf) { 480 pr_err("%s: could not allocate memory!\n", __func__); 481 return -ENOMEM; 482 } 483 tfo = kzalloc(sizeof(struct target_core_fabric_ops), GFP_KERNEL); 484 if (!tfo) { 485 kfree(tf); 486 pr_err("%s: could not allocate memory!\n", __func__); 487 return -ENOMEM; 488 } 489 memcpy(tfo, fo, sizeof(*tfo)); 490 target_set_default_ops(tfo); 491 492 INIT_LIST_HEAD(&tf->tf_list); 493 atomic_set(&tf->tf_access_cnt, 0); 494 tf->tf_ops = tfo; 495 target_fabric_setup_cits(tf); 496 497 mutex_lock(&g_tf_lock); 498 list_add_tail(&tf->tf_list, &g_tf_list); 499 mutex_unlock(&g_tf_lock); 500 501 return 0; 502 } 503 EXPORT_SYMBOL(target_register_template); 504 505 void target_unregister_template(const struct target_core_fabric_ops *fo) 506 { 507 struct target_fabric_configfs *t; 508 509 mutex_lock(&g_tf_lock); 510 list_for_each_entry(t, &g_tf_list, tf_list) { 511 if (!strcmp(t->tf_ops->fabric_name, fo->fabric_name)) { 512 BUG_ON(atomic_read(&t->tf_access_cnt)); 513 list_del(&t->tf_list); 514 mutex_unlock(&g_tf_lock); 515 /* 516 * Wait for any outstanding fabric se_deve_entry->rcu_head 517 * callbacks to complete post kfree_rcu(), before allowing 518 * fabric driver unload of TFO->module to proceed. 519 */ 520 rcu_barrier(); 521 kfree(t->tf_tpg_base_cit.ct_attrs); 522 kfree(t->tf_ops); 523 kfree(t); 524 return; 525 } 526 } 527 mutex_unlock(&g_tf_lock); 528 } 529 EXPORT_SYMBOL(target_unregister_template); 530 531 /*############################################################################## 532 // Stop functions called by external Target Fabrics Modules 533 //############################################################################*/ 534 535 static inline struct se_dev_attrib *to_attrib(struct config_item *item) 536 { 537 return container_of(to_config_group(item), struct se_dev_attrib, 538 da_group); 539 } 540 541 /* Start functions for struct config_item_type tb_dev_attrib_cit */ 542 #define DEF_CONFIGFS_ATTRIB_SHOW(_name) \ 543 static ssize_t _name##_show(struct config_item *item, char *page) \ 544 { \ 545 return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \ 546 } 547 548 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias); 549 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo); 550 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write); 551 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read); 552 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache); 553 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl); 554 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas); 555 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu); 556 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws); 557 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw); 558 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc); 559 DEF_CONFIGFS_ATTRIB_SHOW(emulate_pr); 560 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type); 561 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type); 562 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify); 563 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids); 564 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot); 565 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord); 566 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl); 567 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size); 568 DEF_CONFIGFS_ATTRIB_SHOW(block_size); 569 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors); 570 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors); 571 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth); 572 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth); 573 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count); 574 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count); 575 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity); 576 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment); 577 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data); 578 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len); 579 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rsoc); 580 DEF_CONFIGFS_ATTRIB_SHOW(submit_type); 581 582 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \ 583 static ssize_t _name##_store(struct config_item *item, const char *page,\ 584 size_t count) \ 585 { \ 586 struct se_dev_attrib *da = to_attrib(item); \ 587 u32 val; \ 588 int ret; \ 589 \ 590 ret = kstrtou32(page, 0, &val); \ 591 if (ret < 0) \ 592 return ret; \ 593 da->_name = val; \ 594 return count; \ 595 } 596 597 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count); 598 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count); 599 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity); 600 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment); 601 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len); 602 603 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \ 604 static ssize_t _name##_store(struct config_item *item, const char *page, \ 605 size_t count) \ 606 { \ 607 struct se_dev_attrib *da = to_attrib(item); \ 608 bool flag; \ 609 int ret; \ 610 \ 611 ret = kstrtobool(page, &flag); \ 612 if (ret < 0) \ 613 return ret; \ 614 da->_name = flag; \ 615 return count; \ 616 } 617 618 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write); 619 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw); 620 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc); 621 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr); 622 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids); 623 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot); 624 625 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \ 626 static ssize_t _name##_store(struct config_item *item, const char *page,\ 627 size_t count) \ 628 { \ 629 printk_once(KERN_WARNING \ 630 "ignoring deprecated %s attribute\n", \ 631 __stringify(_name)); \ 632 return count; \ 633 } 634 635 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo); 636 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read); 637 638 static void dev_set_t10_wwn_model_alias(struct se_device *dev) 639 { 640 const char *configname; 641 642 configname = config_item_name(&dev->dev_group.cg_item); 643 if (strlen(configname) >= INQUIRY_MODEL_LEN) { 644 pr_warn("dev[%p]: Backstore name '%s' is too long for " 645 "INQUIRY_MODEL, truncating to 15 characters\n", dev, 646 configname); 647 } 648 /* 649 * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1) 650 * here without potentially breaking existing setups, so continue to 651 * truncate one byte shorter than what can be carried in INQUIRY. 652 */ 653 strscpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN); 654 } 655 656 static ssize_t emulate_model_alias_store(struct config_item *item, 657 const char *page, size_t count) 658 { 659 struct se_dev_attrib *da = to_attrib(item); 660 struct se_device *dev = da->da_dev; 661 bool flag; 662 int ret; 663 664 if (dev->export_count) { 665 pr_err("dev[%p]: Unable to change model alias" 666 " while export_count is %d\n", 667 dev, dev->export_count); 668 return -EINVAL; 669 } 670 671 ret = kstrtobool(page, &flag); 672 if (ret < 0) 673 return ret; 674 675 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); 676 if (flag) { 677 dev_set_t10_wwn_model_alias(dev); 678 } else { 679 strscpy(dev->t10_wwn.model, dev->transport->inquiry_prod, 680 sizeof(dev->t10_wwn.model)); 681 } 682 da->emulate_model_alias = flag; 683 return count; 684 } 685 686 static ssize_t emulate_write_cache_store(struct config_item *item, 687 const char *page, size_t count) 688 { 689 struct se_dev_attrib *da = to_attrib(item); 690 bool flag; 691 int ret; 692 693 ret = kstrtobool(page, &flag); 694 if (ret < 0) 695 return ret; 696 697 if (flag && da->da_dev->transport->get_write_cache) { 698 pr_err("emulate_write_cache not supported for this device\n"); 699 return -EINVAL; 700 } 701 702 da->emulate_write_cache = flag; 703 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 704 da->da_dev, flag); 705 return count; 706 } 707 708 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item, 709 const char *page, size_t count) 710 { 711 struct se_dev_attrib *da = to_attrib(item); 712 u32 val; 713 int ret; 714 715 ret = kstrtou32(page, 0, &val); 716 if (ret < 0) 717 return ret; 718 719 if (val != TARGET_UA_INTLCK_CTRL_CLEAR 720 && val != TARGET_UA_INTLCK_CTRL_NO_CLEAR 721 && val != TARGET_UA_INTLCK_CTRL_ESTABLISH_UA) { 722 pr_err("Illegal value %d\n", val); 723 return -EINVAL; 724 } 725 726 if (da->da_dev->export_count) { 727 pr_err("dev[%p]: Unable to change SE Device" 728 " UA_INTRLCK_CTRL while export_count is %d\n", 729 da->da_dev, da->da_dev->export_count); 730 return -EINVAL; 731 } 732 da->emulate_ua_intlck_ctrl = val; 733 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 734 da->da_dev, val); 735 return count; 736 } 737 738 static ssize_t emulate_tas_store(struct config_item *item, 739 const char *page, size_t count) 740 { 741 struct se_dev_attrib *da = to_attrib(item); 742 bool flag; 743 int ret; 744 745 ret = kstrtobool(page, &flag); 746 if (ret < 0) 747 return ret; 748 749 if (da->da_dev->export_count) { 750 pr_err("dev[%p]: Unable to change SE Device TAS while" 751 " export_count is %d\n", 752 da->da_dev, da->da_dev->export_count); 753 return -EINVAL; 754 } 755 da->emulate_tas = flag; 756 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 757 da->da_dev, flag ? "Enabled" : "Disabled"); 758 759 return count; 760 } 761 762 static ssize_t emulate_tpu_store(struct config_item *item, 763 const char *page, size_t count) 764 { 765 struct se_dev_attrib *da = to_attrib(item); 766 struct se_device *dev = da->da_dev; 767 bool flag; 768 int ret; 769 770 ret = kstrtobool(page, &flag); 771 if (ret < 0) 772 return ret; 773 774 /* 775 * We expect this value to be non-zero when generic Block Layer 776 * Discard supported is detected iblock_create_virtdevice(). 777 */ 778 if (flag && !da->max_unmap_block_desc_count) { 779 if (!dev->transport->configure_unmap || 780 !dev->transport->configure_unmap(dev)) { 781 pr_err("Generic Block Discard not supported\n"); 782 return -ENOSYS; 783 } 784 } 785 786 da->emulate_tpu = flag; 787 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 788 da->da_dev, flag); 789 return count; 790 } 791 792 static ssize_t emulate_tpws_store(struct config_item *item, 793 const char *page, size_t count) 794 { 795 struct se_dev_attrib *da = to_attrib(item); 796 struct se_device *dev = da->da_dev; 797 bool flag; 798 int ret; 799 800 ret = kstrtobool(page, &flag); 801 if (ret < 0) 802 return ret; 803 804 /* 805 * We expect this value to be non-zero when generic Block Layer 806 * Discard supported is detected iblock_create_virtdevice(). 807 */ 808 if (flag && !da->max_unmap_block_desc_count) { 809 if (!dev->transport->configure_unmap || 810 !dev->transport->configure_unmap(dev)) { 811 pr_err("Generic Block Discard not supported\n"); 812 return -ENOSYS; 813 } 814 } 815 816 da->emulate_tpws = flag; 817 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 818 da->da_dev, flag); 819 return count; 820 } 821 822 static ssize_t pi_prot_type_store(struct config_item *item, 823 const char *page, size_t count) 824 { 825 struct se_dev_attrib *da = to_attrib(item); 826 int old_prot = da->pi_prot_type, ret; 827 struct se_device *dev = da->da_dev; 828 u32 flag; 829 830 ret = kstrtou32(page, 0, &flag); 831 if (ret < 0) 832 return ret; 833 834 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) { 835 pr_err("Illegal value %d for pi_prot_type\n", flag); 836 return -EINVAL; 837 } 838 if (flag == 2) { 839 pr_err("DIF TYPE2 protection currently not supported\n"); 840 return -ENOSYS; 841 } 842 if (da->hw_pi_prot_type) { 843 pr_warn("DIF protection enabled on underlying hardware," 844 " ignoring\n"); 845 return count; 846 } 847 if (!dev->transport->init_prot || !dev->transport->free_prot) { 848 /* 0 is only allowed value for non-supporting backends */ 849 if (flag == 0) 850 return count; 851 852 pr_err("DIF protection not supported by backend: %s\n", 853 dev->transport->name); 854 return -ENOSYS; 855 } 856 if (!target_dev_configured(dev)) { 857 pr_err("DIF protection requires device to be configured\n"); 858 return -ENODEV; 859 } 860 if (dev->export_count) { 861 pr_err("dev[%p]: Unable to change SE Device PROT type while" 862 " export_count is %d\n", dev, dev->export_count); 863 return -EINVAL; 864 } 865 866 da->pi_prot_type = flag; 867 868 if (flag && !old_prot) { 869 ret = dev->transport->init_prot(dev); 870 if (ret) { 871 da->pi_prot_type = old_prot; 872 da->pi_prot_verify = (bool) da->pi_prot_type; 873 return ret; 874 } 875 876 } else if (!flag && old_prot) { 877 dev->transport->free_prot(dev); 878 } 879 880 da->pi_prot_verify = (bool) da->pi_prot_type; 881 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag); 882 return count; 883 } 884 885 /* always zero, but attr needs to remain RW to avoid userspace breakage */ 886 static ssize_t pi_prot_format_show(struct config_item *item, char *page) 887 { 888 return snprintf(page, PAGE_SIZE, "0\n"); 889 } 890 891 static ssize_t pi_prot_format_store(struct config_item *item, 892 const char *page, size_t count) 893 { 894 struct se_dev_attrib *da = to_attrib(item); 895 struct se_device *dev = da->da_dev; 896 bool flag; 897 int ret; 898 899 ret = kstrtobool(page, &flag); 900 if (ret < 0) 901 return ret; 902 903 if (!flag) 904 return count; 905 906 if (!dev->transport->format_prot) { 907 pr_err("DIF protection format not supported by backend %s\n", 908 dev->transport->name); 909 return -ENOSYS; 910 } 911 if (!target_dev_configured(dev)) { 912 pr_err("DIF protection format requires device to be configured\n"); 913 return -ENODEV; 914 } 915 if (dev->export_count) { 916 pr_err("dev[%p]: Unable to format SE Device PROT type while" 917 " export_count is %d\n", dev, dev->export_count); 918 return -EINVAL; 919 } 920 921 ret = dev->transport->format_prot(dev); 922 if (ret) 923 return ret; 924 925 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev); 926 return count; 927 } 928 929 static ssize_t pi_prot_verify_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; 939 940 if (!flag) { 941 da->pi_prot_verify = flag; 942 return count; 943 } 944 if (da->hw_pi_prot_type) { 945 pr_warn("DIF protection enabled on underlying hardware," 946 " ignoring\n"); 947 return count; 948 } 949 if (!da->pi_prot_type) { 950 pr_warn("DIF protection not supported by backend, ignoring\n"); 951 return count; 952 } 953 da->pi_prot_verify = flag; 954 955 return count; 956 } 957 958 static ssize_t force_pr_aptpl_store(struct config_item *item, 959 const char *page, size_t count) 960 { 961 struct se_dev_attrib *da = to_attrib(item); 962 bool flag; 963 int ret; 964 965 ret = kstrtobool(page, &flag); 966 if (ret < 0) 967 return ret; 968 if (da->da_dev->export_count) { 969 pr_err("dev[%p]: Unable to set force_pr_aptpl while" 970 " export_count is %d\n", 971 da->da_dev, da->da_dev->export_count); 972 return -EINVAL; 973 } 974 975 da->force_pr_aptpl = flag; 976 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag); 977 return count; 978 } 979 980 static ssize_t emulate_rest_reord_store(struct config_item *item, 981 const char *page, size_t count) 982 { 983 struct se_dev_attrib *da = to_attrib(item); 984 bool flag; 985 int ret; 986 987 ret = kstrtobool(page, &flag); 988 if (ret < 0) 989 return ret; 990 991 if (flag != 0) { 992 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted" 993 " reordering not implemented\n", da->da_dev); 994 return -ENOSYS; 995 } 996 da->emulate_rest_reord = flag; 997 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", 998 da->da_dev, flag); 999 return count; 1000 } 1001 1002 static ssize_t unmap_zeroes_data_store(struct config_item *item, 1003 const char *page, size_t count) 1004 { 1005 struct se_dev_attrib *da = to_attrib(item); 1006 struct se_device *dev = da->da_dev; 1007 bool flag; 1008 int ret; 1009 1010 ret = kstrtobool(page, &flag); 1011 if (ret < 0) 1012 return ret; 1013 1014 if (da->da_dev->export_count) { 1015 pr_err("dev[%p]: Unable to change SE Device" 1016 " unmap_zeroes_data while export_count is %d\n", 1017 da->da_dev, da->da_dev->export_count); 1018 return -EINVAL; 1019 } 1020 /* 1021 * We expect this value to be non-zero when generic Block Layer 1022 * Discard supported is detected iblock_configure_device(). 1023 */ 1024 if (flag && !da->max_unmap_block_desc_count) { 1025 if (!dev->transport->configure_unmap || 1026 !dev->transport->configure_unmap(dev)) { 1027 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set because max_unmap_block_desc_count is zero\n", 1028 da->da_dev); 1029 return -ENOSYS; 1030 } 1031 } 1032 da->unmap_zeroes_data = flag; 1033 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n", 1034 da->da_dev, flag); 1035 return count; 1036 } 1037 1038 /* 1039 * Note, this can only be called on unexported SE Device Object. 1040 */ 1041 static ssize_t queue_depth_store(struct config_item *item, 1042 const char *page, size_t count) 1043 { 1044 struct se_dev_attrib *da = to_attrib(item); 1045 struct se_device *dev = da->da_dev; 1046 u32 val; 1047 int ret; 1048 1049 ret = kstrtou32(page, 0, &val); 1050 if (ret < 0) 1051 return ret; 1052 1053 if (dev->export_count) { 1054 pr_err("dev[%p]: Unable to change SE Device TCQ while" 1055 " export_count is %d\n", 1056 dev, dev->export_count); 1057 return -EINVAL; 1058 } 1059 if (!val) { 1060 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev); 1061 return -EINVAL; 1062 } 1063 1064 if (val > dev->dev_attrib.queue_depth) { 1065 if (val > dev->dev_attrib.hw_queue_depth) { 1066 pr_err("dev[%p]: Passed queue_depth:" 1067 " %u exceeds TCM/SE_Device MAX" 1068 " TCQ: %u\n", dev, val, 1069 dev->dev_attrib.hw_queue_depth); 1070 return -EINVAL; 1071 } 1072 } 1073 da->queue_depth = dev->queue_depth = val; 1074 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val); 1075 return count; 1076 } 1077 1078 static ssize_t optimal_sectors_store(struct config_item *item, 1079 const char *page, size_t count) 1080 { 1081 struct se_dev_attrib *da = to_attrib(item); 1082 u32 val; 1083 int ret; 1084 1085 ret = kstrtou32(page, 0, &val); 1086 if (ret < 0) 1087 return ret; 1088 1089 if (da->da_dev->export_count) { 1090 pr_err("dev[%p]: Unable to change SE Device" 1091 " optimal_sectors while export_count is %d\n", 1092 da->da_dev, da->da_dev->export_count); 1093 return -EINVAL; 1094 } 1095 if (val > da->hw_max_sectors) { 1096 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1097 " greater than hw_max_sectors: %u\n", 1098 da->da_dev, val, da->hw_max_sectors); 1099 return -EINVAL; 1100 } 1101 1102 da->optimal_sectors = val; 1103 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1104 da->da_dev, val); 1105 return count; 1106 } 1107 1108 static ssize_t block_size_store(struct config_item *item, 1109 const char *page, size_t count) 1110 { 1111 struct se_dev_attrib *da = to_attrib(item); 1112 u32 val; 1113 int ret; 1114 1115 ret = kstrtou32(page, 0, &val); 1116 if (ret < 0) 1117 return ret; 1118 1119 if (da->da_dev->export_count) { 1120 pr_err("dev[%p]: Unable to change SE Device block_size" 1121 " while export_count is %d\n", 1122 da->da_dev, da->da_dev->export_count); 1123 return -EINVAL; 1124 } 1125 1126 if (val != 512 && val != 1024 && val != 2048 && val != 4096) { 1127 pr_err("dev[%p]: Illegal value for block_device: %u" 1128 " for SE device, must be 512, 1024, 2048 or 4096\n", 1129 da->da_dev, val); 1130 return -EINVAL; 1131 } 1132 1133 da->block_size = val; 1134 1135 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1136 da->da_dev, val); 1137 return count; 1138 } 1139 1140 static ssize_t alua_support_show(struct config_item *item, char *page) 1141 { 1142 struct se_dev_attrib *da = to_attrib(item); 1143 u8 flags = da->da_dev->transport_flags; 1144 1145 return snprintf(page, PAGE_SIZE, "%d\n", 1146 flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1); 1147 } 1148 1149 static ssize_t alua_support_store(struct config_item *item, 1150 const char *page, size_t count) 1151 { 1152 struct se_dev_attrib *da = to_attrib(item); 1153 struct se_device *dev = da->da_dev; 1154 bool flag, oldflag; 1155 int ret; 1156 1157 ret = kstrtobool(page, &flag); 1158 if (ret < 0) 1159 return ret; 1160 1161 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA); 1162 if (flag == oldflag) 1163 return count; 1164 1165 if (!(dev->transport->transport_flags_changeable & 1166 TRANSPORT_FLAG_PASSTHROUGH_ALUA)) { 1167 pr_err("dev[%p]: Unable to change SE Device alua_support:" 1168 " alua_support has fixed value\n", dev); 1169 return -ENOSYS; 1170 } 1171 1172 if (flag) 1173 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_ALUA; 1174 else 1175 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_ALUA; 1176 return count; 1177 } 1178 1179 static ssize_t pgr_support_show(struct config_item *item, char *page) 1180 { 1181 struct se_dev_attrib *da = to_attrib(item); 1182 u8 flags = da->da_dev->transport_flags; 1183 1184 return snprintf(page, PAGE_SIZE, "%d\n", 1185 flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1); 1186 } 1187 1188 static ssize_t pgr_support_store(struct config_item *item, 1189 const char *page, size_t count) 1190 { 1191 struct se_dev_attrib *da = to_attrib(item); 1192 struct se_device *dev = da->da_dev; 1193 bool flag, oldflag; 1194 int ret; 1195 1196 ret = kstrtobool(page, &flag); 1197 if (ret < 0) 1198 return ret; 1199 1200 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR); 1201 if (flag == oldflag) 1202 return count; 1203 1204 if (!(dev->transport->transport_flags_changeable & 1205 TRANSPORT_FLAG_PASSTHROUGH_PGR)) { 1206 pr_err("dev[%p]: Unable to change SE Device pgr_support:" 1207 " pgr_support has fixed value\n", dev); 1208 return -ENOSYS; 1209 } 1210 1211 if (flag) 1212 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_PGR; 1213 else 1214 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_PGR; 1215 return count; 1216 } 1217 1218 static ssize_t emulate_rsoc_store(struct config_item *item, 1219 const char *page, size_t count) 1220 { 1221 struct se_dev_attrib *da = to_attrib(item); 1222 bool flag; 1223 int ret; 1224 1225 ret = kstrtobool(page, &flag); 1226 if (ret < 0) 1227 return ret; 1228 1229 da->emulate_rsoc = flag; 1230 pr_debug("dev[%p]: SE Device REPORT_SUPPORTED_OPERATION_CODES_EMULATION flag: %d\n", 1231 da->da_dev, flag); 1232 return count; 1233 } 1234 1235 static ssize_t submit_type_store(struct config_item *item, const char *page, 1236 size_t count) 1237 { 1238 struct se_dev_attrib *da = to_attrib(item); 1239 int ret; 1240 u8 val; 1241 1242 ret = kstrtou8(page, 0, &val); 1243 if (ret < 0) 1244 return ret; 1245 1246 if (val > TARGET_QUEUE_SUBMIT) 1247 return -EINVAL; 1248 1249 da->submit_type = val; 1250 return count; 1251 } 1252 1253 CONFIGFS_ATTR(, emulate_model_alias); 1254 CONFIGFS_ATTR(, emulate_dpo); 1255 CONFIGFS_ATTR(, emulate_fua_write); 1256 CONFIGFS_ATTR(, emulate_fua_read); 1257 CONFIGFS_ATTR(, emulate_write_cache); 1258 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl); 1259 CONFIGFS_ATTR(, emulate_tas); 1260 CONFIGFS_ATTR(, emulate_tpu); 1261 CONFIGFS_ATTR(, emulate_tpws); 1262 CONFIGFS_ATTR(, emulate_caw); 1263 CONFIGFS_ATTR(, emulate_3pc); 1264 CONFIGFS_ATTR(, emulate_pr); 1265 CONFIGFS_ATTR(, emulate_rsoc); 1266 CONFIGFS_ATTR(, pi_prot_type); 1267 CONFIGFS_ATTR_RO(, hw_pi_prot_type); 1268 CONFIGFS_ATTR(, pi_prot_format); 1269 CONFIGFS_ATTR(, pi_prot_verify); 1270 CONFIGFS_ATTR(, enforce_pr_isids); 1271 CONFIGFS_ATTR(, is_nonrot); 1272 CONFIGFS_ATTR(, emulate_rest_reord); 1273 CONFIGFS_ATTR(, force_pr_aptpl); 1274 CONFIGFS_ATTR_RO(, hw_block_size); 1275 CONFIGFS_ATTR(, block_size); 1276 CONFIGFS_ATTR_RO(, hw_max_sectors); 1277 CONFIGFS_ATTR(, optimal_sectors); 1278 CONFIGFS_ATTR_RO(, hw_queue_depth); 1279 CONFIGFS_ATTR(, queue_depth); 1280 CONFIGFS_ATTR(, max_unmap_lba_count); 1281 CONFIGFS_ATTR(, max_unmap_block_desc_count); 1282 CONFIGFS_ATTR(, unmap_granularity); 1283 CONFIGFS_ATTR(, unmap_granularity_alignment); 1284 CONFIGFS_ATTR(, unmap_zeroes_data); 1285 CONFIGFS_ATTR(, max_write_same_len); 1286 CONFIGFS_ATTR(, alua_support); 1287 CONFIGFS_ATTR(, pgr_support); 1288 CONFIGFS_ATTR(, submit_type); 1289 1290 /* 1291 * dev_attrib attributes for devices using the target core SBC/SPC 1292 * interpreter. Any backend using spc_parse_cdb should be using 1293 * these. 1294 */ 1295 struct configfs_attribute *sbc_attrib_attrs[] = { 1296 &attr_emulate_model_alias, 1297 &attr_emulate_dpo, 1298 &attr_emulate_fua_write, 1299 &attr_emulate_fua_read, 1300 &attr_emulate_write_cache, 1301 &attr_emulate_ua_intlck_ctrl, 1302 &attr_emulate_tas, 1303 &attr_emulate_tpu, 1304 &attr_emulate_tpws, 1305 &attr_emulate_caw, 1306 &attr_emulate_3pc, 1307 &attr_emulate_pr, 1308 &attr_pi_prot_type, 1309 &attr_hw_pi_prot_type, 1310 &attr_pi_prot_format, 1311 &attr_pi_prot_verify, 1312 &attr_enforce_pr_isids, 1313 &attr_is_nonrot, 1314 &attr_emulate_rest_reord, 1315 &attr_force_pr_aptpl, 1316 &attr_hw_block_size, 1317 &attr_block_size, 1318 &attr_hw_max_sectors, 1319 &attr_optimal_sectors, 1320 &attr_hw_queue_depth, 1321 &attr_queue_depth, 1322 &attr_max_unmap_lba_count, 1323 &attr_max_unmap_block_desc_count, 1324 &attr_unmap_granularity, 1325 &attr_unmap_granularity_alignment, 1326 &attr_unmap_zeroes_data, 1327 &attr_max_write_same_len, 1328 &attr_alua_support, 1329 &attr_pgr_support, 1330 &attr_emulate_rsoc, 1331 &attr_submit_type, 1332 NULL, 1333 }; 1334 EXPORT_SYMBOL(sbc_attrib_attrs); 1335 1336 /* 1337 * Minimal dev_attrib attributes for devices passing through CDBs. 1338 * In this case we only provide a few read-only attributes for 1339 * backwards compatibility. 1340 */ 1341 struct configfs_attribute *passthrough_attrib_attrs[] = { 1342 &attr_hw_pi_prot_type, 1343 &attr_hw_block_size, 1344 &attr_hw_max_sectors, 1345 &attr_hw_queue_depth, 1346 &attr_emulate_pr, 1347 &attr_alua_support, 1348 &attr_pgr_support, 1349 &attr_submit_type, 1350 NULL, 1351 }; 1352 EXPORT_SYMBOL(passthrough_attrib_attrs); 1353 1354 /* 1355 * pr related dev_attrib attributes for devices passing through CDBs, 1356 * but allowing in core pr emulation. 1357 */ 1358 struct configfs_attribute *passthrough_pr_attrib_attrs[] = { 1359 &attr_enforce_pr_isids, 1360 &attr_force_pr_aptpl, 1361 NULL, 1362 }; 1363 EXPORT_SYMBOL(passthrough_pr_attrib_attrs); 1364 1365 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL); 1366 TB_CIT_SETUP_DRV(dev_action, NULL, NULL); 1367 1368 /* End functions for struct config_item_type tb_dev_attrib_cit */ 1369 1370 /* Start functions for struct config_item_type tb_dev_wwn_cit */ 1371 1372 static struct t10_wwn *to_t10_wwn(struct config_item *item) 1373 { 1374 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group); 1375 } 1376 1377 static ssize_t target_check_inquiry_data(char *buf) 1378 { 1379 size_t len; 1380 int i; 1381 1382 len = strlen(buf); 1383 1384 /* 1385 * SPC 4.3.1: 1386 * ASCII data fields shall contain only ASCII printable characters 1387 * (i.e., code values 20h to 7Eh) and may be terminated with one or 1388 * more ASCII null (00h) characters. 1389 */ 1390 for (i = 0; i < len; i++) { 1391 if (buf[i] < 0x20 || buf[i] > 0x7E) { 1392 pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n"); 1393 return -EINVAL; 1394 } 1395 } 1396 1397 return len; 1398 } 1399 1400 /* 1401 * STANDARD and VPD page 0x83 T10 Vendor Identification 1402 */ 1403 static ssize_t target_wwn_vendor_id_show(struct config_item *item, 1404 char *page) 1405 { 1406 return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]); 1407 } 1408 1409 static ssize_t target_wwn_vendor_id_store(struct config_item *item, 1410 const char *page, size_t count) 1411 { 1412 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1413 struct se_device *dev = t10_wwn->t10_dev; 1414 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1415 unsigned char buf[INQUIRY_VENDOR_LEN + 2]; 1416 char *stripped = NULL; 1417 ssize_t len; 1418 ssize_t ret; 1419 1420 len = strscpy(buf, page, sizeof(buf)); 1421 if (len > 0) { 1422 /* Strip any newline added from userspace. */ 1423 stripped = strstrip(buf); 1424 len = strlen(stripped); 1425 } 1426 if (len < 0 || len > INQUIRY_VENDOR_LEN) { 1427 pr_err("Emulated T10 Vendor Identification exceeds" 1428 " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN) 1429 "\n"); 1430 return -EOVERFLOW; 1431 } 1432 1433 ret = target_check_inquiry_data(stripped); 1434 1435 if (ret < 0) 1436 return ret; 1437 1438 /* 1439 * Check to see if any active exports exist. If they do exist, fail 1440 * here as changing this information on the fly (underneath the 1441 * initiator side OS dependent multipath code) could cause negative 1442 * effects. 1443 */ 1444 if (dev->export_count) { 1445 pr_err("Unable to set T10 Vendor Identification while" 1446 " active %d exports exist\n", dev->export_count); 1447 return -EINVAL; 1448 } 1449 1450 BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1); 1451 strscpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor)); 1452 1453 pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:" 1454 " %s\n", dev->t10_wwn.vendor); 1455 1456 return count; 1457 } 1458 1459 static ssize_t target_wwn_product_id_show(struct config_item *item, 1460 char *page) 1461 { 1462 return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]); 1463 } 1464 1465 static ssize_t target_wwn_product_id_store(struct config_item *item, 1466 const char *page, size_t count) 1467 { 1468 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1469 struct se_device *dev = t10_wwn->t10_dev; 1470 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1471 unsigned char buf[INQUIRY_MODEL_LEN + 2]; 1472 char *stripped = NULL; 1473 ssize_t len; 1474 ssize_t ret; 1475 1476 len = strscpy(buf, page, sizeof(buf)); 1477 if (len > 0) { 1478 /* Strip any newline added from userspace. */ 1479 stripped = strstrip(buf); 1480 len = strlen(stripped); 1481 } 1482 if (len < 0 || len > INQUIRY_MODEL_LEN) { 1483 pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: " 1484 __stringify(INQUIRY_MODEL_LEN) 1485 "\n"); 1486 return -EOVERFLOW; 1487 } 1488 1489 ret = target_check_inquiry_data(stripped); 1490 1491 if (ret < 0) 1492 return ret; 1493 1494 /* 1495 * Check to see if any active exports exist. If they do exist, fail 1496 * here as changing this information on the fly (underneath the 1497 * initiator side OS dependent multipath code) could cause negative 1498 * effects. 1499 */ 1500 if (dev->export_count) { 1501 pr_err("Unable to set T10 Model while active %d exports exist\n", 1502 dev->export_count); 1503 return -EINVAL; 1504 } 1505 1506 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); 1507 strscpy(dev->t10_wwn.model, stripped, sizeof(dev->t10_wwn.model)); 1508 1509 pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n", 1510 dev->t10_wwn.model); 1511 1512 return count; 1513 } 1514 1515 static ssize_t target_wwn_revision_show(struct config_item *item, 1516 char *page) 1517 { 1518 return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]); 1519 } 1520 1521 static ssize_t target_wwn_revision_store(struct config_item *item, 1522 const char *page, size_t count) 1523 { 1524 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1525 struct se_device *dev = t10_wwn->t10_dev; 1526 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1527 unsigned char buf[INQUIRY_REVISION_LEN + 2]; 1528 char *stripped = NULL; 1529 ssize_t len; 1530 ssize_t ret; 1531 1532 len = strscpy(buf, page, sizeof(buf)); 1533 if (len > 0) { 1534 /* Strip any newline added from userspace. */ 1535 stripped = strstrip(buf); 1536 len = strlen(stripped); 1537 } 1538 if (len < 0 || len > INQUIRY_REVISION_LEN) { 1539 pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: " 1540 __stringify(INQUIRY_REVISION_LEN) 1541 "\n"); 1542 return -EOVERFLOW; 1543 } 1544 1545 ret = target_check_inquiry_data(stripped); 1546 1547 if (ret < 0) 1548 return ret; 1549 1550 /* 1551 * Check to see if any active exports exist. If they do exist, fail 1552 * here as changing this information on the fly (underneath the 1553 * initiator side OS dependent multipath code) could cause negative 1554 * effects. 1555 */ 1556 if (dev->export_count) { 1557 pr_err("Unable to set T10 Revision while active %d exports exist\n", 1558 dev->export_count); 1559 return -EINVAL; 1560 } 1561 1562 BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1); 1563 strscpy(dev->t10_wwn.revision, stripped, sizeof(dev->t10_wwn.revision)); 1564 1565 pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n", 1566 dev->t10_wwn.revision); 1567 1568 return count; 1569 } 1570 1571 static ssize_t 1572 target_wwn_company_id_show(struct config_item *item, 1573 char *page) 1574 { 1575 return snprintf(page, PAGE_SIZE, "%#08x\n", 1576 to_t10_wwn(item)->company_id); 1577 } 1578 1579 static ssize_t 1580 target_wwn_company_id_store(struct config_item *item, 1581 const char *page, size_t count) 1582 { 1583 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1584 struct se_device *dev = t10_wwn->t10_dev; 1585 u32 val; 1586 int ret; 1587 1588 /* 1589 * The IEEE COMPANY_ID field should contain a 24-bit canonical 1590 * form OUI assigned by the IEEE. 1591 */ 1592 ret = kstrtou32(page, 0, &val); 1593 if (ret < 0) 1594 return ret; 1595 1596 if (val >= 0x1000000) 1597 return -EOVERFLOW; 1598 1599 /* 1600 * Check to see if any active exports exist. If they do exist, fail 1601 * here as changing this information on the fly (underneath the 1602 * initiator side OS dependent multipath code) could cause negative 1603 * effects. 1604 */ 1605 if (dev->export_count) { 1606 pr_err("Unable to set Company ID while %u exports exist\n", 1607 dev->export_count); 1608 return -EINVAL; 1609 } 1610 1611 t10_wwn->company_id = val; 1612 1613 pr_debug("Target_Core_ConfigFS: Set IEEE Company ID: %#08x\n", 1614 t10_wwn->company_id); 1615 1616 return count; 1617 } 1618 1619 /* 1620 * VPD page 0x80 Unit serial 1621 */ 1622 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item, 1623 char *page) 1624 { 1625 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 1626 &to_t10_wwn(item)->unit_serial[0]); 1627 } 1628 1629 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item, 1630 const char *page, size_t count) 1631 { 1632 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1633 struct se_device *dev = t10_wwn->t10_dev; 1634 unsigned char buf[INQUIRY_VPD_SERIAL_LEN] = { }; 1635 1636 /* 1637 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 1638 * from the struct scsi_device level firmware, do not allow 1639 * VPD Unit Serial to be emulated. 1640 * 1641 * Note this struct scsi_device could also be emulating VPD 1642 * information from its drivers/scsi LLD. But for now we assume 1643 * it is doing 'the right thing' wrt a world wide unique 1644 * VPD Unit Serial Number that OS dependent multipath can depend on. 1645 */ 1646 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) { 1647 pr_err("Underlying SCSI device firmware provided VPD" 1648 " Unit Serial, ignoring request\n"); 1649 return -EOPNOTSUPP; 1650 } 1651 1652 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 1653 pr_err("Emulated VPD Unit Serial exceeds" 1654 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 1655 return -EOVERFLOW; 1656 } 1657 /* 1658 * Check to see if any active $FABRIC_MOD exports exist. If they 1659 * do exist, fail here as changing this information on the fly 1660 * (underneath the initiator side OS dependent multipath code) 1661 * could cause negative effects. 1662 */ 1663 if (dev->export_count) { 1664 pr_err("Unable to set VPD Unit Serial while" 1665 " active %d $FABRIC_MOD exports exist\n", 1666 dev->export_count); 1667 return -EINVAL; 1668 } 1669 1670 /* 1671 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 1672 * 1673 * Also, strip any newline added from the userspace 1674 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 1675 */ 1676 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 1677 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 1678 "%s", strstrip(buf)); 1679 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL; 1680 1681 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 1682 " %s\n", dev->t10_wwn.unit_serial); 1683 1684 return count; 1685 } 1686 1687 /* 1688 * VPD page 0x83 Protocol Identifier 1689 */ 1690 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item, 1691 char *page) 1692 { 1693 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1694 struct t10_vpd *vpd; 1695 unsigned char buf[VPD_TMP_BUF_SIZE] = { }; 1696 ssize_t len = 0; 1697 1698 spin_lock(&t10_wwn->t10_vpd_lock); 1699 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 1700 if (!vpd->protocol_identifier_set) 1701 continue; 1702 1703 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 1704 1705 if (len + strlen(buf) >= PAGE_SIZE) 1706 break; 1707 1708 len += sprintf(page+len, "%s", buf); 1709 } 1710 spin_unlock(&t10_wwn->t10_vpd_lock); 1711 1712 return len; 1713 } 1714 1715 /* 1716 * Generic wrapper for dumping VPD identifiers by association. 1717 */ 1718 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 1719 static ssize_t target_wwn_##_name##_show(struct config_item *item, \ 1720 char *page) \ 1721 { \ 1722 struct t10_wwn *t10_wwn = to_t10_wwn(item); \ 1723 struct t10_vpd *vpd; \ 1724 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 1725 ssize_t len = 0; \ 1726 \ 1727 spin_lock(&t10_wwn->t10_vpd_lock); \ 1728 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 1729 if (vpd->association != _assoc) \ 1730 continue; \ 1731 \ 1732 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1733 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 1734 if (len + strlen(buf) >= PAGE_SIZE) \ 1735 break; \ 1736 len += sprintf(page+len, "%s", buf); \ 1737 \ 1738 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1739 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 1740 if (len + strlen(buf) >= PAGE_SIZE) \ 1741 break; \ 1742 len += sprintf(page+len, "%s", buf); \ 1743 \ 1744 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1745 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 1746 if (len + strlen(buf) >= PAGE_SIZE) \ 1747 break; \ 1748 len += sprintf(page+len, "%s", buf); \ 1749 } \ 1750 spin_unlock(&t10_wwn->t10_vpd_lock); \ 1751 \ 1752 return len; \ 1753 } 1754 1755 /* VPD page 0x83 Association: Logical Unit */ 1756 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 1757 /* VPD page 0x83 Association: Target Port */ 1758 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 1759 /* VPD page 0x83 Association: SCSI Target Device */ 1760 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 1761 1762 CONFIGFS_ATTR(target_wwn_, vendor_id); 1763 CONFIGFS_ATTR(target_wwn_, product_id); 1764 CONFIGFS_ATTR(target_wwn_, revision); 1765 CONFIGFS_ATTR(target_wwn_, company_id); 1766 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial); 1767 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier); 1768 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit); 1769 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port); 1770 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device); 1771 1772 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 1773 &target_wwn_attr_vendor_id, 1774 &target_wwn_attr_product_id, 1775 &target_wwn_attr_revision, 1776 &target_wwn_attr_company_id, 1777 &target_wwn_attr_vpd_unit_serial, 1778 &target_wwn_attr_vpd_protocol_identifier, 1779 &target_wwn_attr_vpd_assoc_logical_unit, 1780 &target_wwn_attr_vpd_assoc_target_port, 1781 &target_wwn_attr_vpd_assoc_scsi_target_device, 1782 NULL, 1783 }; 1784 1785 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs); 1786 1787 /* End functions for struct config_item_type tb_dev_wwn_cit */ 1788 1789 /* Start functions for struct config_item_type tb_dev_pr_cit */ 1790 1791 static struct se_device *pr_to_dev(struct config_item *item) 1792 { 1793 return container_of(to_config_group(item), struct se_device, 1794 dev_pr_group); 1795 } 1796 1797 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev, 1798 char *page) 1799 { 1800 struct se_node_acl *se_nacl; 1801 struct t10_pr_registration *pr_reg; 1802 char i_buf[PR_REG_ISID_ID_LEN] = { }; 1803 1804 pr_reg = dev->dev_pr_res_holder; 1805 if (!pr_reg) 1806 return sprintf(page, "No SPC-3 Reservation holder\n"); 1807 1808 se_nacl = pr_reg->pr_reg_nacl; 1809 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1810 1811 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", 1812 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1813 se_nacl->initiatorname, i_buf); 1814 } 1815 1816 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, 1817 char *page) 1818 { 1819 struct se_session *sess = dev->reservation_holder; 1820 struct se_node_acl *se_nacl; 1821 ssize_t len; 1822 1823 if (sess) { 1824 se_nacl = sess->se_node_acl; 1825 len = sprintf(page, 1826 "SPC-2 Reservation: %s Initiator: %s\n", 1827 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1828 se_nacl->initiatorname); 1829 } else { 1830 len = sprintf(page, "No SPC-2 Reservation holder\n"); 1831 } 1832 return len; 1833 } 1834 1835 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page) 1836 { 1837 struct se_device *dev = pr_to_dev(item); 1838 int ret; 1839 1840 if (!dev->dev_attrib.emulate_pr) 1841 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 1842 1843 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1844 return sprintf(page, "Passthrough\n"); 1845 1846 spin_lock(&dev->dev_reservation_lock); 1847 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1848 ret = target_core_dev_pr_show_spc2_res(dev, page); 1849 else 1850 ret = target_core_dev_pr_show_spc3_res(dev, page); 1851 spin_unlock(&dev->dev_reservation_lock); 1852 return ret; 1853 } 1854 1855 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item, 1856 char *page) 1857 { 1858 struct se_device *dev = pr_to_dev(item); 1859 ssize_t len = 0; 1860 1861 spin_lock(&dev->dev_reservation_lock); 1862 if (!dev->dev_pr_res_holder) { 1863 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1864 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { 1865 len = sprintf(page, "SPC-3 Reservation: All Target" 1866 " Ports registration\n"); 1867 } else { 1868 len = sprintf(page, "SPC-3 Reservation: Single" 1869 " Target Port registration\n"); 1870 } 1871 1872 spin_unlock(&dev->dev_reservation_lock); 1873 return len; 1874 } 1875 1876 static ssize_t target_pr_res_pr_generation_show(struct config_item *item, 1877 char *page) 1878 { 1879 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation); 1880 } 1881 1882 1883 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item, 1884 char *page) 1885 { 1886 struct se_device *dev = pr_to_dev(item); 1887 struct se_node_acl *se_nacl; 1888 struct se_portal_group *se_tpg; 1889 struct t10_pr_registration *pr_reg; 1890 const struct target_core_fabric_ops *tfo; 1891 ssize_t len = 0; 1892 1893 spin_lock(&dev->dev_reservation_lock); 1894 pr_reg = dev->dev_pr_res_holder; 1895 if (!pr_reg) { 1896 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1897 goto out_unlock; 1898 } 1899 1900 se_nacl = pr_reg->pr_reg_nacl; 1901 se_tpg = se_nacl->se_tpg; 1902 tfo = se_tpg->se_tpg_tfo; 1903 1904 len += sprintf(page+len, "SPC-3 Reservation: %s" 1905 " Target Node Endpoint: %s\n", tfo->fabric_name, 1906 tfo->tpg_get_wwn(se_tpg)); 1907 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1908 " Identifier Tag: %hu %s Portal Group Tag: %hu" 1909 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi, 1910 tfo->fabric_name, tfo->tpg_get_tag(se_tpg), 1911 tfo->fabric_name, pr_reg->pr_aptpl_target_lun); 1912 1913 out_unlock: 1914 spin_unlock(&dev->dev_reservation_lock); 1915 return len; 1916 } 1917 1918 1919 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item, 1920 char *page) 1921 { 1922 struct se_device *dev = pr_to_dev(item); 1923 const struct target_core_fabric_ops *tfo; 1924 struct t10_pr_registration *pr_reg; 1925 unsigned char buf[384]; 1926 char i_buf[PR_REG_ISID_ID_LEN]; 1927 ssize_t len = 0; 1928 int reg_count = 0; 1929 1930 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1931 1932 spin_lock(&dev->t10_pr.registration_lock); 1933 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1934 pr_reg_list) { 1935 1936 memset(buf, 0, 384); 1937 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1938 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1939 core_pr_dump_initiator_port(pr_reg, i_buf, 1940 PR_REG_ISID_ID_LEN); 1941 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1942 tfo->fabric_name, 1943 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, 1944 pr_reg->pr_res_generation); 1945 1946 if (len + strlen(buf) >= PAGE_SIZE) 1947 break; 1948 1949 len += sprintf(page+len, "%s", buf); 1950 reg_count++; 1951 } 1952 spin_unlock(&dev->t10_pr.registration_lock); 1953 1954 if (!reg_count) 1955 len += sprintf(page+len, "None\n"); 1956 1957 return len; 1958 } 1959 1960 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page) 1961 { 1962 struct se_device *dev = pr_to_dev(item); 1963 struct t10_pr_registration *pr_reg; 1964 ssize_t len = 0; 1965 1966 spin_lock(&dev->dev_reservation_lock); 1967 pr_reg = dev->dev_pr_res_holder; 1968 if (pr_reg) { 1969 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1970 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 1971 } else { 1972 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1973 } 1974 1975 spin_unlock(&dev->dev_reservation_lock); 1976 return len; 1977 } 1978 1979 static ssize_t target_pr_res_type_show(struct config_item *item, char *page) 1980 { 1981 struct se_device *dev = pr_to_dev(item); 1982 1983 if (!dev->dev_attrib.emulate_pr) 1984 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 1985 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1986 return sprintf(page, "SPC_PASSTHROUGH\n"); 1987 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1988 return sprintf(page, "SPC2_RESERVATIONS\n"); 1989 1990 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 1991 } 1992 1993 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item, 1994 char *page) 1995 { 1996 struct se_device *dev = pr_to_dev(item); 1997 1998 if (!dev->dev_attrib.emulate_pr || 1999 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 2000 return 0; 2001 2002 return sprintf(page, "APTPL Bit Status: %s\n", 2003 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 2004 } 2005 2006 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item, 2007 char *page) 2008 { 2009 struct se_device *dev = pr_to_dev(item); 2010 2011 if (!dev->dev_attrib.emulate_pr || 2012 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 2013 return 0; 2014 2015 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 2016 } 2017 2018 enum { 2019 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 2020 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 2021 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 2022 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 2023 }; 2024 2025 static match_table_t tokens = { 2026 {Opt_initiator_fabric, "initiator_fabric=%s"}, 2027 {Opt_initiator_node, "initiator_node=%s"}, 2028 {Opt_initiator_sid, "initiator_sid=%s"}, 2029 {Opt_sa_res_key, "sa_res_key=%s"}, 2030 {Opt_res_holder, "res_holder=%d"}, 2031 {Opt_res_type, "res_type=%d"}, 2032 {Opt_res_scope, "res_scope=%d"}, 2033 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 2034 {Opt_mapped_lun, "mapped_lun=%u"}, 2035 {Opt_target_fabric, "target_fabric=%s"}, 2036 {Opt_target_node, "target_node=%s"}, 2037 {Opt_tpgt, "tpgt=%d"}, 2038 {Opt_port_rtpi, "port_rtpi=%d"}, 2039 {Opt_target_lun, "target_lun=%u"}, 2040 {Opt_err, NULL} 2041 }; 2042 2043 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item, 2044 const char *page, size_t count) 2045 { 2046 struct se_device *dev = pr_to_dev(item); 2047 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 2048 unsigned char *t_fabric = NULL, *t_port = NULL; 2049 char *orig, *ptr, *opts; 2050 substring_t args[MAX_OPT_ARGS]; 2051 unsigned long long tmp_ll; 2052 u64 sa_res_key = 0; 2053 u64 mapped_lun = 0, target_lun = 0; 2054 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 2055 u16 tpgt = 0; 2056 u8 type = 0; 2057 2058 if (!dev->dev_attrib.emulate_pr || 2059 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 2060 return count; 2061 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 2062 return count; 2063 2064 if (dev->export_count) { 2065 pr_debug("Unable to process APTPL metadata while" 2066 " active fabric exports exist\n"); 2067 return -EINVAL; 2068 } 2069 2070 opts = kstrdup(page, GFP_KERNEL); 2071 if (!opts) 2072 return -ENOMEM; 2073 2074 orig = opts; 2075 while ((ptr = strsep(&opts, ",\n")) != NULL) { 2076 if (!*ptr) 2077 continue; 2078 2079 token = match_token(ptr, tokens, args); 2080 switch (token) { 2081 case Opt_initiator_fabric: 2082 i_fabric = match_strdup(args); 2083 if (!i_fabric) { 2084 ret = -ENOMEM; 2085 goto out; 2086 } 2087 break; 2088 case Opt_initiator_node: 2089 i_port = match_strdup(args); 2090 if (!i_port) { 2091 ret = -ENOMEM; 2092 goto out; 2093 } 2094 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 2095 pr_err("APTPL metadata initiator_node=" 2096 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 2097 PR_APTPL_MAX_IPORT_LEN); 2098 ret = -EINVAL; 2099 break; 2100 } 2101 break; 2102 case Opt_initiator_sid: 2103 isid = match_strdup(args); 2104 if (!isid) { 2105 ret = -ENOMEM; 2106 goto out; 2107 } 2108 if (strlen(isid) >= PR_REG_ISID_LEN) { 2109 pr_err("APTPL metadata initiator_isid" 2110 "= exceeds PR_REG_ISID_LEN: %d\n", 2111 PR_REG_ISID_LEN); 2112 ret = -EINVAL; 2113 break; 2114 } 2115 break; 2116 case Opt_sa_res_key: 2117 ret = match_u64(args, &tmp_ll); 2118 if (ret < 0) { 2119 pr_err("kstrtoull() failed for sa_res_key=\n"); 2120 goto out; 2121 } 2122 sa_res_key = (u64)tmp_ll; 2123 break; 2124 /* 2125 * PR APTPL Metadata for Reservation 2126 */ 2127 case Opt_res_holder: 2128 ret = match_int(args, &arg); 2129 if (ret) 2130 goto out; 2131 res_holder = arg; 2132 break; 2133 case Opt_res_type: 2134 ret = match_int(args, &arg); 2135 if (ret) 2136 goto out; 2137 type = (u8)arg; 2138 break; 2139 case Opt_res_scope: 2140 ret = match_int(args, &arg); 2141 if (ret) 2142 goto out; 2143 break; 2144 case Opt_res_all_tg_pt: 2145 ret = match_int(args, &arg); 2146 if (ret) 2147 goto out; 2148 all_tg_pt = (int)arg; 2149 break; 2150 case Opt_mapped_lun: 2151 ret = match_u64(args, &tmp_ll); 2152 if (ret) 2153 goto out; 2154 mapped_lun = (u64)tmp_ll; 2155 break; 2156 /* 2157 * PR APTPL Metadata for Target Port 2158 */ 2159 case Opt_target_fabric: 2160 t_fabric = match_strdup(args); 2161 if (!t_fabric) { 2162 ret = -ENOMEM; 2163 goto out; 2164 } 2165 break; 2166 case Opt_target_node: 2167 t_port = match_strdup(args); 2168 if (!t_port) { 2169 ret = -ENOMEM; 2170 goto out; 2171 } 2172 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 2173 pr_err("APTPL metadata target_node=" 2174 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 2175 PR_APTPL_MAX_TPORT_LEN); 2176 ret = -EINVAL; 2177 break; 2178 } 2179 break; 2180 case Opt_tpgt: 2181 ret = match_int(args, &arg); 2182 if (ret) 2183 goto out; 2184 tpgt = (u16)arg; 2185 break; 2186 case Opt_port_rtpi: 2187 ret = match_int(args, &arg); 2188 if (ret) 2189 goto out; 2190 break; 2191 case Opt_target_lun: 2192 ret = match_u64(args, &tmp_ll); 2193 if (ret) 2194 goto out; 2195 target_lun = (u64)tmp_ll; 2196 break; 2197 default: 2198 break; 2199 } 2200 } 2201 2202 if (!i_port || !t_port || !sa_res_key) { 2203 pr_err("Illegal parameters for APTPL registration\n"); 2204 ret = -EINVAL; 2205 goto out; 2206 } 2207 2208 if (res_holder && !(type)) { 2209 pr_err("Illegal PR type: 0x%02x for reservation" 2210 " holder\n", type); 2211 ret = -EINVAL; 2212 goto out; 2213 } 2214 2215 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, 2216 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 2217 res_holder, all_tg_pt, type); 2218 out: 2219 kfree(i_fabric); 2220 kfree(i_port); 2221 kfree(isid); 2222 kfree(t_fabric); 2223 kfree(t_port); 2224 kfree(orig); 2225 return (ret == 0) ? count : ret; 2226 } 2227 2228 2229 CONFIGFS_ATTR_RO(target_pr_, res_holder); 2230 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts); 2231 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation); 2232 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port); 2233 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts); 2234 CONFIGFS_ATTR_RO(target_pr_, res_pr_type); 2235 CONFIGFS_ATTR_RO(target_pr_, res_type); 2236 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active); 2237 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata); 2238 2239 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 2240 &target_pr_attr_res_holder, 2241 &target_pr_attr_res_pr_all_tgt_pts, 2242 &target_pr_attr_res_pr_generation, 2243 &target_pr_attr_res_pr_holder_tg_port, 2244 &target_pr_attr_res_pr_registered_i_pts, 2245 &target_pr_attr_res_pr_type, 2246 &target_pr_attr_res_type, 2247 &target_pr_attr_res_aptpl_active, 2248 &target_pr_attr_res_aptpl_metadata, 2249 NULL, 2250 }; 2251 2252 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs); 2253 2254 /* End functions for struct config_item_type tb_dev_pr_cit */ 2255 2256 /* Start functions for struct config_item_type tb_dev_cit */ 2257 2258 static inline struct se_device *to_device(struct config_item *item) 2259 { 2260 return container_of(to_config_group(item), struct se_device, dev_group); 2261 } 2262 2263 static ssize_t target_dev_info_show(struct config_item *item, char *page) 2264 { 2265 struct se_device *dev = to_device(item); 2266 int bl = 0; 2267 ssize_t read_bytes = 0; 2268 2269 transport_dump_dev_state(dev, page, &bl); 2270 read_bytes += bl; 2271 read_bytes += dev->transport->show_configfs_dev_params(dev, 2272 page+read_bytes); 2273 return read_bytes; 2274 } 2275 2276 static ssize_t target_dev_control_store(struct config_item *item, 2277 const char *page, size_t count) 2278 { 2279 struct se_device *dev = to_device(item); 2280 2281 return dev->transport->set_configfs_dev_params(dev, page, count); 2282 } 2283 2284 static ssize_t target_dev_alias_show(struct config_item *item, char *page) 2285 { 2286 struct se_device *dev = to_device(item); 2287 2288 if (!(dev->dev_flags & DF_USING_ALIAS)) 2289 return 0; 2290 2291 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); 2292 } 2293 2294 static ssize_t target_dev_alias_store(struct config_item *item, 2295 const char *page, size_t count) 2296 { 2297 struct se_device *dev = to_device(item); 2298 struct se_hba *hba = dev->se_hba; 2299 ssize_t read_bytes; 2300 2301 if (count > (SE_DEV_ALIAS_LEN-1)) { 2302 pr_err("alias count: %d exceeds" 2303 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 2304 SE_DEV_ALIAS_LEN-1); 2305 return -EINVAL; 2306 } 2307 2308 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); 2309 if (!read_bytes) 2310 return -EINVAL; 2311 if (dev->dev_alias[read_bytes - 1] == '\n') 2312 dev->dev_alias[read_bytes - 1] = '\0'; 2313 2314 dev->dev_flags |= DF_USING_ALIAS; 2315 2316 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 2317 config_item_name(&hba->hba_group.cg_item), 2318 config_item_name(&dev->dev_group.cg_item), 2319 dev->dev_alias); 2320 2321 return read_bytes; 2322 } 2323 2324 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page) 2325 { 2326 struct se_device *dev = to_device(item); 2327 2328 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) 2329 return 0; 2330 2331 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); 2332 } 2333 2334 static ssize_t target_dev_udev_path_store(struct config_item *item, 2335 const char *page, size_t count) 2336 { 2337 struct se_device *dev = to_device(item); 2338 struct se_hba *hba = dev->se_hba; 2339 ssize_t read_bytes; 2340 2341 if (count > (SE_UDEV_PATH_LEN-1)) { 2342 pr_err("udev_path count: %d exceeds" 2343 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 2344 SE_UDEV_PATH_LEN-1); 2345 return -EINVAL; 2346 } 2347 2348 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, 2349 "%s", page); 2350 if (!read_bytes) 2351 return -EINVAL; 2352 if (dev->udev_path[read_bytes - 1] == '\n') 2353 dev->udev_path[read_bytes - 1] = '\0'; 2354 2355 dev->dev_flags |= DF_USING_UDEV_PATH; 2356 2357 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 2358 config_item_name(&hba->hba_group.cg_item), 2359 config_item_name(&dev->dev_group.cg_item), 2360 dev->udev_path); 2361 2362 return read_bytes; 2363 } 2364 2365 static ssize_t target_dev_enable_show(struct config_item *item, char *page) 2366 { 2367 struct se_device *dev = to_device(item); 2368 2369 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev)); 2370 } 2371 2372 static ssize_t target_dev_enable_store(struct config_item *item, 2373 const char *page, size_t count) 2374 { 2375 struct se_device *dev = to_device(item); 2376 char *ptr; 2377 int ret; 2378 2379 ptr = strstr(page, "1"); 2380 if (!ptr) { 2381 pr_err("For dev_enable ops, only valid value" 2382 " is \"1\"\n"); 2383 return -EINVAL; 2384 } 2385 2386 ret = target_configure_device(dev); 2387 if (ret) 2388 return ret; 2389 return count; 2390 } 2391 2392 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page) 2393 { 2394 struct se_device *dev = to_device(item); 2395 struct config_item *lu_ci; 2396 struct t10_alua_lu_gp *lu_gp; 2397 struct t10_alua_lu_gp_member *lu_gp_mem; 2398 ssize_t len = 0; 2399 2400 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2401 if (!lu_gp_mem) 2402 return 0; 2403 2404 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2405 lu_gp = lu_gp_mem->lu_gp; 2406 if (lu_gp) { 2407 lu_ci = &lu_gp->lu_gp_group.cg_item; 2408 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 2409 config_item_name(lu_ci), lu_gp->lu_gp_id); 2410 } 2411 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2412 2413 return len; 2414 } 2415 2416 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item, 2417 const char *page, size_t count) 2418 { 2419 struct se_device *dev = to_device(item); 2420 struct se_hba *hba = dev->se_hba; 2421 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 2422 struct t10_alua_lu_gp_member *lu_gp_mem; 2423 unsigned char buf[LU_GROUP_NAME_BUF] = { }; 2424 int move = 0; 2425 2426 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2427 if (!lu_gp_mem) 2428 return count; 2429 2430 if (count > LU_GROUP_NAME_BUF) { 2431 pr_err("ALUA LU Group Alias too large!\n"); 2432 return -EINVAL; 2433 } 2434 memcpy(buf, page, count); 2435 /* 2436 * Any ALUA logical unit alias besides "NULL" means we will be 2437 * making a new group association. 2438 */ 2439 if (strcmp(strstrip(buf), "NULL")) { 2440 /* 2441 * core_alua_get_lu_gp_by_name() will increment reference to 2442 * struct t10_alua_lu_gp. This reference is released with 2443 * core_alua_get_lu_gp_by_name below(). 2444 */ 2445 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 2446 if (!lu_gp_new) 2447 return -ENODEV; 2448 } 2449 2450 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2451 lu_gp = lu_gp_mem->lu_gp; 2452 if (lu_gp) { 2453 /* 2454 * Clearing an existing lu_gp association, and replacing 2455 * with NULL 2456 */ 2457 if (!lu_gp_new) { 2458 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 2459 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 2460 " %hu\n", 2461 config_item_name(&hba->hba_group.cg_item), 2462 config_item_name(&dev->dev_group.cg_item), 2463 config_item_name(&lu_gp->lu_gp_group.cg_item), 2464 lu_gp->lu_gp_id); 2465 2466 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2467 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2468 2469 return count; 2470 } 2471 /* 2472 * Removing existing association of lu_gp_mem with lu_gp 2473 */ 2474 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2475 move = 1; 2476 } 2477 /* 2478 * Associate lu_gp_mem with lu_gp_new. 2479 */ 2480 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 2481 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2482 2483 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 2484 " core/alua/lu_gps/%s, ID: %hu\n", 2485 (move) ? "Moving" : "Adding", 2486 config_item_name(&hba->hba_group.cg_item), 2487 config_item_name(&dev->dev_group.cg_item), 2488 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 2489 lu_gp_new->lu_gp_id); 2490 2491 core_alua_put_lu_gp_from_name(lu_gp_new); 2492 return count; 2493 } 2494 2495 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page) 2496 { 2497 struct se_device *dev = to_device(item); 2498 struct t10_alua_lba_map *map; 2499 struct t10_alua_lba_map_member *mem; 2500 char *b = page; 2501 int bl = 0; 2502 char state; 2503 2504 spin_lock(&dev->t10_alua.lba_map_lock); 2505 if (!list_empty(&dev->t10_alua.lba_map_list)) 2506 bl += sprintf(b + bl, "%u %u\n", 2507 dev->t10_alua.lba_map_segment_size, 2508 dev->t10_alua.lba_map_segment_multiplier); 2509 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) { 2510 bl += sprintf(b + bl, "%llu %llu", 2511 map->lba_map_first_lba, map->lba_map_last_lba); 2512 list_for_each_entry(mem, &map->lba_map_mem_list, 2513 lba_map_mem_list) { 2514 switch (mem->lba_map_mem_alua_state) { 2515 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: 2516 state = 'O'; 2517 break; 2518 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: 2519 state = 'A'; 2520 break; 2521 case ALUA_ACCESS_STATE_STANDBY: 2522 state = 'S'; 2523 break; 2524 case ALUA_ACCESS_STATE_UNAVAILABLE: 2525 state = 'U'; 2526 break; 2527 default: 2528 state = '.'; 2529 break; 2530 } 2531 bl += sprintf(b + bl, " %d:%c", 2532 mem->lba_map_mem_alua_pg_id, state); 2533 } 2534 bl += sprintf(b + bl, "\n"); 2535 } 2536 spin_unlock(&dev->t10_alua.lba_map_lock); 2537 return bl; 2538 } 2539 2540 static ssize_t target_dev_lba_map_store(struct config_item *item, 2541 const char *page, size_t count) 2542 { 2543 struct se_device *dev = to_device(item); 2544 struct t10_alua_lba_map *lba_map = NULL; 2545 struct list_head lba_list; 2546 char *map_entries, *orig, *ptr; 2547 char state; 2548 int pg_num = -1, pg; 2549 int ret = 0, num = 0, pg_id, alua_state; 2550 unsigned long start_lba = -1, end_lba = -1; 2551 unsigned long segment_size = -1, segment_mult = -1; 2552 2553 orig = map_entries = kstrdup(page, GFP_KERNEL); 2554 if (!map_entries) 2555 return -ENOMEM; 2556 2557 INIT_LIST_HEAD(&lba_list); 2558 while ((ptr = strsep(&map_entries, "\n")) != NULL) { 2559 if (!*ptr) 2560 continue; 2561 2562 if (num == 0) { 2563 if (sscanf(ptr, "%lu %lu\n", 2564 &segment_size, &segment_mult) != 2) { 2565 pr_err("Invalid line %d\n", num); 2566 ret = -EINVAL; 2567 break; 2568 } 2569 num++; 2570 continue; 2571 } 2572 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) { 2573 pr_err("Invalid line %d\n", num); 2574 ret = -EINVAL; 2575 break; 2576 } 2577 ptr = strchr(ptr, ' '); 2578 if (!ptr) { 2579 pr_err("Invalid line %d, missing end lba\n", num); 2580 ret = -EINVAL; 2581 break; 2582 } 2583 ptr++; 2584 ptr = strchr(ptr, ' '); 2585 if (!ptr) { 2586 pr_err("Invalid line %d, missing state definitions\n", 2587 num); 2588 ret = -EINVAL; 2589 break; 2590 } 2591 ptr++; 2592 lba_map = core_alua_allocate_lba_map(&lba_list, 2593 start_lba, end_lba); 2594 if (IS_ERR(lba_map)) { 2595 ret = PTR_ERR(lba_map); 2596 break; 2597 } 2598 pg = 0; 2599 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) { 2600 switch (state) { 2601 case 'O': 2602 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED; 2603 break; 2604 case 'A': 2605 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED; 2606 break; 2607 case 'S': 2608 alua_state = ALUA_ACCESS_STATE_STANDBY; 2609 break; 2610 case 'U': 2611 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE; 2612 break; 2613 default: 2614 pr_err("Invalid ALUA state '%c'\n", state); 2615 ret = -EINVAL; 2616 goto out; 2617 } 2618 2619 ret = core_alua_allocate_lba_map_mem(lba_map, 2620 pg_id, alua_state); 2621 if (ret) { 2622 pr_err("Invalid target descriptor %d:%c " 2623 "at line %d\n", 2624 pg_id, state, num); 2625 break; 2626 } 2627 pg++; 2628 ptr = strchr(ptr, ' '); 2629 if (ptr) 2630 ptr++; 2631 else 2632 break; 2633 } 2634 if (pg_num == -1) 2635 pg_num = pg; 2636 else if (pg != pg_num) { 2637 pr_err("Only %d from %d port groups definitions " 2638 "at line %d\n", pg, pg_num, num); 2639 ret = -EINVAL; 2640 break; 2641 } 2642 num++; 2643 } 2644 out: 2645 if (ret) { 2646 core_alua_free_lba_map(&lba_list); 2647 count = ret; 2648 } else 2649 core_alua_set_lba_map(dev, &lba_list, 2650 segment_size, segment_mult); 2651 kfree(orig); 2652 return count; 2653 } 2654 2655 CONFIGFS_ATTR_RO(target_dev_, info); 2656 CONFIGFS_ATTR_WO(target_dev_, control); 2657 CONFIGFS_ATTR(target_dev_, alias); 2658 CONFIGFS_ATTR(target_dev_, udev_path); 2659 CONFIGFS_ATTR(target_dev_, enable); 2660 CONFIGFS_ATTR(target_dev_, alua_lu_gp); 2661 CONFIGFS_ATTR(target_dev_, lba_map); 2662 2663 static struct configfs_attribute *target_core_dev_attrs[] = { 2664 &target_dev_attr_info, 2665 &target_dev_attr_control, 2666 &target_dev_attr_alias, 2667 &target_dev_attr_udev_path, 2668 &target_dev_attr_enable, 2669 &target_dev_attr_alua_lu_gp, 2670 &target_dev_attr_lba_map, 2671 NULL, 2672 }; 2673 2674 static void target_core_dev_release(struct config_item *item) 2675 { 2676 struct config_group *dev_cg = to_config_group(item); 2677 struct se_device *dev = 2678 container_of(dev_cg, struct se_device, dev_group); 2679 2680 target_free_device(dev); 2681 } 2682 2683 /* 2684 * Used in target_core_fabric_configfs.c to verify valid se_device symlink 2685 * within target_fabric_port_link() 2686 */ 2687 struct configfs_item_operations target_core_dev_item_ops = { 2688 .release = target_core_dev_release, 2689 }; 2690 2691 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs); 2692 2693 /* End functions for struct config_item_type tb_dev_cit */ 2694 2695 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 2696 2697 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item) 2698 { 2699 return container_of(to_config_group(item), struct t10_alua_lu_gp, 2700 lu_gp_group); 2701 } 2702 2703 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page) 2704 { 2705 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2706 2707 if (!lu_gp->lu_gp_valid_id) 2708 return 0; 2709 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2710 } 2711 2712 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item, 2713 const char *page, size_t count) 2714 { 2715 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2716 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2717 unsigned long lu_gp_id; 2718 int ret; 2719 2720 ret = kstrtoul(page, 0, &lu_gp_id); 2721 if (ret < 0) { 2722 pr_err("kstrtoul() returned %d for" 2723 " lu_gp_id\n", ret); 2724 return ret; 2725 } 2726 if (lu_gp_id > 0x0000ffff) { 2727 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 2728 " 0x0000ffff\n", lu_gp_id); 2729 return -EINVAL; 2730 } 2731 2732 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2733 if (ret < 0) 2734 return -EINVAL; 2735 2736 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 2737 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2738 config_item_name(&alua_lu_gp_cg->cg_item), 2739 lu_gp->lu_gp_id); 2740 2741 return count; 2742 } 2743 2744 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page) 2745 { 2746 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2747 struct se_device *dev; 2748 struct se_hba *hba; 2749 struct t10_alua_lu_gp_member *lu_gp_mem; 2750 ssize_t len = 0, cur_len; 2751 unsigned char buf[LU_GROUP_NAME_BUF] = { }; 2752 2753 spin_lock(&lu_gp->lu_gp_lock); 2754 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2755 dev = lu_gp_mem->lu_gp_mem_dev; 2756 hba = dev->se_hba; 2757 2758 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 2759 config_item_name(&hba->hba_group.cg_item), 2760 config_item_name(&dev->dev_group.cg_item)); 2761 cur_len++; /* Extra byte for NULL terminator */ 2762 2763 if ((cur_len + len) > PAGE_SIZE) { 2764 pr_warn("Ran out of lu_gp_show_attr" 2765 "_members buffer\n"); 2766 break; 2767 } 2768 memcpy(page+len, buf, cur_len); 2769 len += cur_len; 2770 } 2771 spin_unlock(&lu_gp->lu_gp_lock); 2772 2773 return len; 2774 } 2775 2776 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id); 2777 CONFIGFS_ATTR_RO(target_lu_gp_, members); 2778 2779 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2780 &target_lu_gp_attr_lu_gp_id, 2781 &target_lu_gp_attr_members, 2782 NULL, 2783 }; 2784 2785 static void target_core_alua_lu_gp_release(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 core_alua_free_lu_gp(lu_gp); 2791 } 2792 2793 static struct configfs_item_operations target_core_alua_lu_gp_ops = { 2794 .release = target_core_alua_lu_gp_release, 2795 }; 2796 2797 static const struct config_item_type target_core_alua_lu_gp_cit = { 2798 .ct_item_ops = &target_core_alua_lu_gp_ops, 2799 .ct_attrs = target_core_alua_lu_gp_attrs, 2800 .ct_owner = THIS_MODULE, 2801 }; 2802 2803 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2804 2805 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2806 2807 static struct config_group *target_core_alua_create_lu_gp( 2808 struct config_group *group, 2809 const char *name) 2810 { 2811 struct t10_alua_lu_gp *lu_gp; 2812 struct config_group *alua_lu_gp_cg = NULL; 2813 struct config_item *alua_lu_gp_ci = NULL; 2814 2815 lu_gp = core_alua_allocate_lu_gp(name, 0); 2816 if (IS_ERR(lu_gp)) 2817 return NULL; 2818 2819 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2820 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2821 2822 config_group_init_type_name(alua_lu_gp_cg, name, 2823 &target_core_alua_lu_gp_cit); 2824 2825 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2826 " Group: core/alua/lu_gps/%s\n", 2827 config_item_name(alua_lu_gp_ci)); 2828 2829 return alua_lu_gp_cg; 2830 2831 } 2832 2833 static void target_core_alua_drop_lu_gp( 2834 struct config_group *group, 2835 struct config_item *item) 2836 { 2837 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2838 struct t10_alua_lu_gp, lu_gp_group); 2839 2840 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2841 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2842 config_item_name(item), lu_gp->lu_gp_id); 2843 /* 2844 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 2845 * -> target_core_alua_lu_gp_release() 2846 */ 2847 config_item_put(item); 2848 } 2849 2850 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2851 .make_group = &target_core_alua_create_lu_gp, 2852 .drop_item = &target_core_alua_drop_lu_gp, 2853 }; 2854 2855 static const struct config_item_type target_core_alua_lu_gps_cit = { 2856 .ct_item_ops = NULL, 2857 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2858 .ct_owner = THIS_MODULE, 2859 }; 2860 2861 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2862 2863 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2864 2865 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item) 2866 { 2867 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp, 2868 tg_pt_gp_group); 2869 } 2870 2871 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item, 2872 char *page) 2873 { 2874 return sprintf(page, "%d\n", 2875 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state); 2876 } 2877 2878 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item, 2879 const char *page, size_t count) 2880 { 2881 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2882 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; 2883 unsigned long tmp; 2884 int new_state, ret; 2885 2886 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2887 pr_err("Unable to do implicit ALUA on invalid tg_pt_gp ID\n"); 2888 return -EINVAL; 2889 } 2890 if (!target_dev_configured(dev)) { 2891 pr_err("Unable to set alua_access_state while device is" 2892 " not configured\n"); 2893 return -ENODEV; 2894 } 2895 2896 ret = kstrtoul(page, 0, &tmp); 2897 if (ret < 0) { 2898 pr_err("Unable to extract new ALUA access state from" 2899 " %s\n", page); 2900 return ret; 2901 } 2902 new_state = (int)tmp; 2903 2904 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) { 2905 pr_err("Unable to process implicit configfs ALUA" 2906 " transition while TPGS_IMPLICIT_ALUA is disabled\n"); 2907 return -EINVAL; 2908 } 2909 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA && 2910 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) { 2911 /* LBA DEPENDENT is only allowed with implicit ALUA */ 2912 pr_err("Unable to process implicit configfs ALUA transition" 2913 " while explicit ALUA management is enabled\n"); 2914 return -EINVAL; 2915 } 2916 2917 ret = core_alua_do_port_transition(tg_pt_gp, dev, 2918 NULL, NULL, new_state, 0); 2919 return (!ret) ? count : -EINVAL; 2920 } 2921 2922 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item, 2923 char *page) 2924 { 2925 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2926 return sprintf(page, "%s\n", 2927 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2928 } 2929 2930 static ssize_t target_tg_pt_gp_alua_access_status_store( 2931 struct config_item *item, const char *page, size_t count) 2932 { 2933 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2934 unsigned long tmp; 2935 int new_status, ret; 2936 2937 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2938 pr_err("Unable to set ALUA access status on invalid tg_pt_gp ID\n"); 2939 return -EINVAL; 2940 } 2941 2942 ret = kstrtoul(page, 0, &tmp); 2943 if (ret < 0) { 2944 pr_err("Unable to extract new ALUA access status" 2945 " from %s\n", page); 2946 return ret; 2947 } 2948 new_status = (int)tmp; 2949 2950 if ((new_status != ALUA_STATUS_NONE) && 2951 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && 2952 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { 2953 pr_err("Illegal ALUA access status: 0x%02x\n", 2954 new_status); 2955 return -EINVAL; 2956 } 2957 2958 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2959 return count; 2960 } 2961 2962 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item, 2963 char *page) 2964 { 2965 return core_alua_show_access_type(to_tg_pt_gp(item), page); 2966 } 2967 2968 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item, 2969 const char *page, size_t count) 2970 { 2971 return core_alua_store_access_type(to_tg_pt_gp(item), page, count); 2972 } 2973 2974 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \ 2975 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \ 2976 struct config_item *item, char *p) \ 2977 { \ 2978 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 2979 return sprintf(p, "%d\n", \ 2980 !!(t->tg_pt_gp_alua_supported_states & _bit)); \ 2981 } \ 2982 \ 2983 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \ 2984 struct config_item *item, const char *p, size_t c) \ 2985 { \ 2986 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 2987 unsigned long tmp; \ 2988 int ret; \ 2989 \ 2990 if (!t->tg_pt_gp_valid_id) { \ 2991 pr_err("Unable to set " #_name " ALUA state on invalid tg_pt_gp ID\n"); \ 2992 return -EINVAL; \ 2993 } \ 2994 \ 2995 ret = kstrtoul(p, 0, &tmp); \ 2996 if (ret < 0) { \ 2997 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \ 2998 return -EINVAL; \ 2999 } \ 3000 if (tmp > 1) { \ 3001 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \ 3002 return -EINVAL; \ 3003 } \ 3004 if (tmp) \ 3005 t->tg_pt_gp_alua_supported_states |= _bit; \ 3006 else \ 3007 t->tg_pt_gp_alua_supported_states &= ~_bit; \ 3008 \ 3009 return c; \ 3010 } 3011 3012 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP); 3013 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP); 3014 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP); 3015 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP); 3016 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP); 3017 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP); 3018 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP); 3019 3020 static ssize_t target_tg_pt_gp_alua_write_metadata_show( 3021 struct config_item *item, char *page) 3022 { 3023 return sprintf(page, "%d\n", 3024 to_tg_pt_gp(item)->tg_pt_gp_write_metadata); 3025 } 3026 3027 static ssize_t target_tg_pt_gp_alua_write_metadata_store( 3028 struct config_item *item, const char *page, size_t count) 3029 { 3030 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3031 unsigned long tmp; 3032 int ret; 3033 3034 ret = kstrtoul(page, 0, &tmp); 3035 if (ret < 0) { 3036 pr_err("Unable to extract alua_write_metadata\n"); 3037 return ret; 3038 } 3039 3040 if ((tmp != 0) && (tmp != 1)) { 3041 pr_err("Illegal value for alua_write_metadata:" 3042 " %lu\n", tmp); 3043 return -EINVAL; 3044 } 3045 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 3046 3047 return count; 3048 } 3049 3050 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item, 3051 char *page) 3052 { 3053 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page); 3054 } 3055 3056 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item, 3057 const char *page, size_t count) 3058 { 3059 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page, 3060 count); 3061 } 3062 3063 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item, 3064 char *page) 3065 { 3066 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page); 3067 } 3068 3069 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item, 3070 const char *page, size_t count) 3071 { 3072 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page, 3073 count); 3074 } 3075 3076 static ssize_t target_tg_pt_gp_implicit_trans_secs_show( 3077 struct config_item *item, char *page) 3078 { 3079 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page); 3080 } 3081 3082 static ssize_t target_tg_pt_gp_implicit_trans_secs_store( 3083 struct config_item *item, const char *page, size_t count) 3084 { 3085 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page, 3086 count); 3087 } 3088 3089 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item, 3090 char *page) 3091 { 3092 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page); 3093 } 3094 3095 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item, 3096 const char *page, size_t count) 3097 { 3098 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count); 3099 } 3100 3101 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item, 3102 char *page) 3103 { 3104 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3105 3106 if (!tg_pt_gp->tg_pt_gp_valid_id) 3107 return 0; 3108 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 3109 } 3110 3111 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item, 3112 const char *page, size_t count) 3113 { 3114 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3115 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 3116 unsigned long tg_pt_gp_id; 3117 int ret; 3118 3119 ret = kstrtoul(page, 0, &tg_pt_gp_id); 3120 if (ret < 0) { 3121 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n", 3122 page); 3123 return ret; 3124 } 3125 if (tg_pt_gp_id > 0x0000ffff) { 3126 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n", 3127 tg_pt_gp_id); 3128 return -EINVAL; 3129 } 3130 3131 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 3132 if (ret < 0) 3133 return -EINVAL; 3134 3135 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 3136 "core/alua/tg_pt_gps/%s to ID: %hu\n", 3137 config_item_name(&alua_tg_pt_gp_cg->cg_item), 3138 tg_pt_gp->tg_pt_gp_id); 3139 3140 return count; 3141 } 3142 3143 static ssize_t target_tg_pt_gp_members_show(struct config_item *item, 3144 char *page) 3145 { 3146 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3147 struct se_lun *lun; 3148 ssize_t len = 0, cur_len; 3149 unsigned char buf[TG_PT_GROUP_NAME_BUF] = { }; 3150 3151 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 3152 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, 3153 lun_tg_pt_gp_link) { 3154 struct se_portal_group *tpg = lun->lun_tpg; 3155 3156 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 3157 "/%s\n", tpg->se_tpg_tfo->fabric_name, 3158 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 3159 tpg->se_tpg_tfo->tpg_get_tag(tpg), 3160 config_item_name(&lun->lun_group.cg_item)); 3161 cur_len++; /* Extra byte for NULL terminator */ 3162 3163 if ((cur_len + len) > PAGE_SIZE) { 3164 pr_warn("Ran out of lu_gp_show_attr" 3165 "_members buffer\n"); 3166 break; 3167 } 3168 memcpy(page+len, buf, cur_len); 3169 len += cur_len; 3170 } 3171 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 3172 3173 return len; 3174 } 3175 3176 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state); 3177 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status); 3178 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type); 3179 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning); 3180 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline); 3181 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent); 3182 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable); 3183 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby); 3184 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized); 3185 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized); 3186 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata); 3187 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs); 3188 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs); 3189 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs); 3190 CONFIGFS_ATTR(target_tg_pt_gp_, preferred); 3191 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id); 3192 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members); 3193 3194 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 3195 &target_tg_pt_gp_attr_alua_access_state, 3196 &target_tg_pt_gp_attr_alua_access_status, 3197 &target_tg_pt_gp_attr_alua_access_type, 3198 &target_tg_pt_gp_attr_alua_support_transitioning, 3199 &target_tg_pt_gp_attr_alua_support_offline, 3200 &target_tg_pt_gp_attr_alua_support_lba_dependent, 3201 &target_tg_pt_gp_attr_alua_support_unavailable, 3202 &target_tg_pt_gp_attr_alua_support_standby, 3203 &target_tg_pt_gp_attr_alua_support_active_nonoptimized, 3204 &target_tg_pt_gp_attr_alua_support_active_optimized, 3205 &target_tg_pt_gp_attr_alua_write_metadata, 3206 &target_tg_pt_gp_attr_nonop_delay_msecs, 3207 &target_tg_pt_gp_attr_trans_delay_msecs, 3208 &target_tg_pt_gp_attr_implicit_trans_secs, 3209 &target_tg_pt_gp_attr_preferred, 3210 &target_tg_pt_gp_attr_tg_pt_gp_id, 3211 &target_tg_pt_gp_attr_members, 3212 NULL, 3213 }; 3214 3215 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 3216 { 3217 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3218 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3219 3220 core_alua_free_tg_pt_gp(tg_pt_gp); 3221 } 3222 3223 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 3224 .release = target_core_alua_tg_pt_gp_release, 3225 }; 3226 3227 static const struct config_item_type target_core_alua_tg_pt_gp_cit = { 3228 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 3229 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 3230 .ct_owner = THIS_MODULE, 3231 }; 3232 3233 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 3234 3235 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3236 3237 static struct config_group *target_core_alua_create_tg_pt_gp( 3238 struct config_group *group, 3239 const char *name) 3240 { 3241 struct t10_alua *alua = container_of(group, struct t10_alua, 3242 alua_tg_pt_gps_group); 3243 struct t10_alua_tg_pt_gp *tg_pt_gp; 3244 struct config_group *alua_tg_pt_gp_cg = NULL; 3245 struct config_item *alua_tg_pt_gp_ci = NULL; 3246 3247 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0); 3248 if (!tg_pt_gp) 3249 return NULL; 3250 3251 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 3252 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 3253 3254 config_group_init_type_name(alua_tg_pt_gp_cg, name, 3255 &target_core_alua_tg_pt_gp_cit); 3256 3257 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 3258 " Group: alua/tg_pt_gps/%s\n", 3259 config_item_name(alua_tg_pt_gp_ci)); 3260 3261 return alua_tg_pt_gp_cg; 3262 } 3263 3264 static void target_core_alua_drop_tg_pt_gp( 3265 struct config_group *group, 3266 struct config_item *item) 3267 { 3268 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3269 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3270 3271 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 3272 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 3273 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 3274 /* 3275 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 3276 * -> target_core_alua_tg_pt_gp_release(). 3277 */ 3278 config_item_put(item); 3279 } 3280 3281 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 3282 .make_group = &target_core_alua_create_tg_pt_gp, 3283 .drop_item = &target_core_alua_drop_tg_pt_gp, 3284 }; 3285 3286 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL); 3287 3288 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3289 3290 /* Start functions for struct config_item_type target_core_alua_cit */ 3291 3292 /* 3293 * target_core_alua_cit is a ConfigFS group that lives under 3294 * /sys/kernel/config/target/core/alua. There are default groups 3295 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 3296 * target_core_alua_cit in target_core_init_configfs() below. 3297 */ 3298 static const struct config_item_type target_core_alua_cit = { 3299 .ct_item_ops = NULL, 3300 .ct_attrs = NULL, 3301 .ct_owner = THIS_MODULE, 3302 }; 3303 3304 /* End functions for struct config_item_type target_core_alua_cit */ 3305 3306 /* Start functions for struct config_item_type tb_dev_stat_cit */ 3307 3308 static struct config_group *target_core_stat_mkdir( 3309 struct config_group *group, 3310 const char *name) 3311 { 3312 return ERR_PTR(-ENOSYS); 3313 } 3314 3315 static void target_core_stat_rmdir( 3316 struct config_group *group, 3317 struct config_item *item) 3318 { 3319 return; 3320 } 3321 3322 static struct configfs_group_operations target_core_stat_group_ops = { 3323 .make_group = &target_core_stat_mkdir, 3324 .drop_item = &target_core_stat_rmdir, 3325 }; 3326 3327 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL); 3328 3329 /* End functions for struct config_item_type tb_dev_stat_cit */ 3330 3331 /* Start functions for struct config_item_type target_core_hba_cit */ 3332 3333 static struct config_group *target_core_make_subdev( 3334 struct config_group *group, 3335 const char *name) 3336 { 3337 struct t10_alua_tg_pt_gp *tg_pt_gp; 3338 struct config_item *hba_ci = &group->cg_item; 3339 struct se_hba *hba = item_to_hba(hba_ci); 3340 struct target_backend *tb = hba->backend; 3341 struct se_device *dev; 3342 int errno = -ENOMEM, ret; 3343 3344 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 3345 if (ret) 3346 return ERR_PTR(ret); 3347 3348 dev = target_alloc_device(hba, name); 3349 if (!dev) 3350 goto out_unlock; 3351 3352 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit); 3353 3354 config_group_init_type_name(&dev->dev_action_group, "action", 3355 &tb->tb_dev_action_cit); 3356 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group); 3357 3358 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib", 3359 &tb->tb_dev_attrib_cit); 3360 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group); 3361 3362 config_group_init_type_name(&dev->dev_pr_group, "pr", 3363 &tb->tb_dev_pr_cit); 3364 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group); 3365 3366 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn", 3367 &tb->tb_dev_wwn_cit); 3368 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group, 3369 &dev->dev_group); 3370 3371 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group, 3372 "alua", &tb->tb_dev_alua_tg_pt_gps_cit); 3373 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group, 3374 &dev->dev_group); 3375 3376 config_group_init_type_name(&dev->dev_stat_grps.stat_group, 3377 "statistics", &tb->tb_dev_stat_cit); 3378 configfs_add_default_group(&dev->dev_stat_grps.stat_group, 3379 &dev->dev_group); 3380 3381 /* 3382 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 3383 */ 3384 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1); 3385 if (!tg_pt_gp) 3386 goto out_free_device; 3387 dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 3388 3389 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 3390 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 3391 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group, 3392 &dev->t10_alua.alua_tg_pt_gps_group); 3393 3394 /* 3395 * Add core/$HBA/$DEV/statistics/ default groups 3396 */ 3397 target_stat_setup_dev_default_groups(dev); 3398 3399 mutex_lock(&target_devices_lock); 3400 target_devices++; 3401 mutex_unlock(&target_devices_lock); 3402 3403 mutex_unlock(&hba->hba_access_mutex); 3404 return &dev->dev_group; 3405 3406 out_free_device: 3407 target_free_device(dev); 3408 out_unlock: 3409 mutex_unlock(&hba->hba_access_mutex); 3410 return ERR_PTR(errno); 3411 } 3412 3413 static void target_core_drop_subdev( 3414 struct config_group *group, 3415 struct config_item *item) 3416 { 3417 struct config_group *dev_cg = to_config_group(item); 3418 struct se_device *dev = 3419 container_of(dev_cg, struct se_device, dev_group); 3420 struct se_hba *hba; 3421 3422 hba = item_to_hba(&dev->se_hba->hba_group.cg_item); 3423 3424 mutex_lock(&hba->hba_access_mutex); 3425 3426 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group); 3427 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group); 3428 3429 /* 3430 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 3431 * directly from target_core_alua_tg_pt_gp_release(). 3432 */ 3433 dev->t10_alua.default_tg_pt_gp = NULL; 3434 3435 configfs_remove_default_groups(dev_cg); 3436 3437 /* 3438 * se_dev is released from target_core_dev_item_ops->release() 3439 */ 3440 config_item_put(item); 3441 3442 mutex_lock(&target_devices_lock); 3443 target_devices--; 3444 mutex_unlock(&target_devices_lock); 3445 3446 mutex_unlock(&hba->hba_access_mutex); 3447 } 3448 3449 static struct configfs_group_operations target_core_hba_group_ops = { 3450 .make_group = target_core_make_subdev, 3451 .drop_item = target_core_drop_subdev, 3452 }; 3453 3454 3455 static inline struct se_hba *to_hba(struct config_item *item) 3456 { 3457 return container_of(to_config_group(item), struct se_hba, hba_group); 3458 } 3459 3460 static ssize_t target_hba_info_show(struct config_item *item, char *page) 3461 { 3462 struct se_hba *hba = to_hba(item); 3463 3464 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 3465 hba->hba_id, hba->backend->ops->name, 3466 TARGET_CORE_VERSION); 3467 } 3468 3469 static ssize_t target_hba_mode_show(struct config_item *item, char *page) 3470 { 3471 struct se_hba *hba = to_hba(item); 3472 int hba_mode = 0; 3473 3474 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 3475 hba_mode = 1; 3476 3477 return sprintf(page, "%d\n", hba_mode); 3478 } 3479 3480 static ssize_t target_hba_mode_store(struct config_item *item, 3481 const char *page, size_t count) 3482 { 3483 struct se_hba *hba = to_hba(item); 3484 unsigned long mode_flag; 3485 int ret; 3486 3487 if (hba->backend->ops->pmode_enable_hba == NULL) 3488 return -EINVAL; 3489 3490 ret = kstrtoul(page, 0, &mode_flag); 3491 if (ret < 0) { 3492 pr_err("Unable to extract hba mode flag: %d\n", ret); 3493 return ret; 3494 } 3495 3496 if (hba->dev_count) { 3497 pr_err("Unable to set hba_mode with active devices\n"); 3498 return -EINVAL; 3499 } 3500 3501 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag); 3502 if (ret < 0) 3503 return -EINVAL; 3504 if (ret > 0) 3505 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 3506 else if (ret == 0) 3507 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 3508 3509 return count; 3510 } 3511 3512 CONFIGFS_ATTR_RO(target_, hba_info); 3513 CONFIGFS_ATTR(target_, hba_mode); 3514 3515 static void target_core_hba_release(struct config_item *item) 3516 { 3517 struct se_hba *hba = container_of(to_config_group(item), 3518 struct se_hba, hba_group); 3519 core_delete_hba(hba); 3520 } 3521 3522 static struct configfs_attribute *target_core_hba_attrs[] = { 3523 &target_attr_hba_info, 3524 &target_attr_hba_mode, 3525 NULL, 3526 }; 3527 3528 static struct configfs_item_operations target_core_hba_item_ops = { 3529 .release = target_core_hba_release, 3530 }; 3531 3532 static const struct config_item_type target_core_hba_cit = { 3533 .ct_item_ops = &target_core_hba_item_ops, 3534 .ct_group_ops = &target_core_hba_group_ops, 3535 .ct_attrs = target_core_hba_attrs, 3536 .ct_owner = THIS_MODULE, 3537 }; 3538 3539 static struct config_group *target_core_call_addhbatotarget( 3540 struct config_group *group, 3541 const char *name) 3542 { 3543 char *se_plugin_str, *str, *str2; 3544 struct se_hba *hba; 3545 char buf[TARGET_CORE_NAME_MAX_LEN] = { }; 3546 unsigned long plugin_dep_id = 0; 3547 int ret; 3548 3549 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 3550 pr_err("Passed *name strlen(): %d exceeds" 3551 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 3552 TARGET_CORE_NAME_MAX_LEN); 3553 return ERR_PTR(-ENAMETOOLONG); 3554 } 3555 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 3556 3557 str = strstr(buf, "_"); 3558 if (!str) { 3559 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 3560 return ERR_PTR(-EINVAL); 3561 } 3562 se_plugin_str = buf; 3563 /* 3564 * Special case for subsystem plugins that have "_" in their names. 3565 * Namely rd_direct and rd_mcp.. 3566 */ 3567 str2 = strstr(str+1, "_"); 3568 if (str2) { 3569 *str2 = '\0'; /* Terminate for *se_plugin_str */ 3570 str2++; /* Skip to start of plugin dependent ID */ 3571 str = str2; 3572 } else { 3573 *str = '\0'; /* Terminate for *se_plugin_str */ 3574 str++; /* Skip to start of plugin dependent ID */ 3575 } 3576 3577 ret = kstrtoul(str, 0, &plugin_dep_id); 3578 if (ret < 0) { 3579 pr_err("kstrtoul() returned %d for" 3580 " plugin_dep_id\n", ret); 3581 return ERR_PTR(ret); 3582 } 3583 /* 3584 * Load up TCM subsystem plugins if they have not already been loaded. 3585 */ 3586 transport_subsystem_check_init(); 3587 3588 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 3589 if (IS_ERR(hba)) 3590 return ERR_CAST(hba); 3591 3592 config_group_init_type_name(&hba->hba_group, name, 3593 &target_core_hba_cit); 3594 3595 return &hba->hba_group; 3596 } 3597 3598 static void target_core_call_delhbafromtarget( 3599 struct config_group *group, 3600 struct config_item *item) 3601 { 3602 /* 3603 * core_delete_hba() is called from target_core_hba_item_ops->release() 3604 * -> target_core_hba_release() 3605 */ 3606 config_item_put(item); 3607 } 3608 3609 static struct configfs_group_operations target_core_group_ops = { 3610 .make_group = target_core_call_addhbatotarget, 3611 .drop_item = target_core_call_delhbafromtarget, 3612 }; 3613 3614 static const struct config_item_type target_core_cit = { 3615 .ct_item_ops = NULL, 3616 .ct_group_ops = &target_core_group_ops, 3617 .ct_attrs = NULL, 3618 .ct_owner = THIS_MODULE, 3619 }; 3620 3621 /* Stop functions for struct config_item_type target_core_hba_cit */ 3622 3623 void target_setup_backend_cits(struct target_backend *tb) 3624 { 3625 target_core_setup_dev_cit(tb); 3626 target_core_setup_dev_action_cit(tb); 3627 target_core_setup_dev_attrib_cit(tb); 3628 target_core_setup_dev_pr_cit(tb); 3629 target_core_setup_dev_wwn_cit(tb); 3630 target_core_setup_dev_alua_tg_pt_gps_cit(tb); 3631 target_core_setup_dev_stat_cit(tb); 3632 } 3633 3634 static void target_init_dbroot(void) 3635 { 3636 struct file *fp; 3637 3638 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED); 3639 fp = filp_open(db_root_stage, O_RDONLY, 0); 3640 if (IS_ERR(fp)) { 3641 pr_err("db_root: cannot open: %s\n", db_root_stage); 3642 return; 3643 } 3644 if (!S_ISDIR(file_inode(fp)->i_mode)) { 3645 filp_close(fp, NULL); 3646 pr_err("db_root: not a valid directory: %s\n", db_root_stage); 3647 return; 3648 } 3649 filp_close(fp, NULL); 3650 3651 strncpy(db_root, db_root_stage, DB_ROOT_LEN); 3652 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); 3653 } 3654 3655 static int __init target_core_init_configfs(void) 3656 { 3657 struct configfs_subsystem *subsys = &target_core_fabrics; 3658 struct t10_alua_lu_gp *lu_gp; 3659 int ret; 3660 3661 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 3662 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3663 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3664 3665 config_group_init(&subsys->su_group); 3666 mutex_init(&subsys->su_mutex); 3667 3668 ret = init_se_kmem_caches(); 3669 if (ret < 0) 3670 return ret; 3671 /* 3672 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3673 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3674 */ 3675 config_group_init_type_name(&target_core_hbagroup, "core", 3676 &target_core_cit); 3677 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group); 3678 3679 /* 3680 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3681 */ 3682 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit); 3683 configfs_add_default_group(&alua_group, &target_core_hbagroup); 3684 3685 /* 3686 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3687 * groups under /sys/kernel/config/target/core/alua/ 3688 */ 3689 config_group_init_type_name(&alua_lu_gps_group, "lu_gps", 3690 &target_core_alua_lu_gps_cit); 3691 configfs_add_default_group(&alua_lu_gps_group, &alua_group); 3692 3693 /* 3694 * Add core/alua/lu_gps/default_lu_gp 3695 */ 3696 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3697 if (IS_ERR(lu_gp)) { 3698 ret = -ENOMEM; 3699 goto out_global; 3700 } 3701 3702 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3703 &target_core_alua_lu_gp_cit); 3704 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group); 3705 3706 default_lu_gp = lu_gp; 3707 3708 /* 3709 * Register the target_core_mod subsystem with configfs. 3710 */ 3711 ret = configfs_register_subsystem(subsys); 3712 if (ret < 0) { 3713 pr_err("Error %d while registering subsystem %s\n", 3714 ret, subsys->su_group.cg_item.ci_namebuf); 3715 goto out_global; 3716 } 3717 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 3718 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s" 3719 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3720 /* 3721 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3722 */ 3723 ret = rd_module_init(); 3724 if (ret < 0) 3725 goto out; 3726 3727 ret = core_dev_setup_virtual_lun0(); 3728 if (ret < 0) 3729 goto out; 3730 3731 ret = target_xcopy_setup_pt(); 3732 if (ret < 0) 3733 goto out; 3734 3735 target_init_dbroot(); 3736 3737 return 0; 3738 3739 out: 3740 configfs_unregister_subsystem(subsys); 3741 core_dev_release_virtual_lun0(); 3742 rd_module_exit(); 3743 out_global: 3744 if (default_lu_gp) { 3745 core_alua_free_lu_gp(default_lu_gp); 3746 default_lu_gp = NULL; 3747 } 3748 release_se_kmem_caches(); 3749 return ret; 3750 } 3751 3752 static void __exit target_core_exit_configfs(void) 3753 { 3754 configfs_remove_default_groups(&alua_lu_gps_group); 3755 configfs_remove_default_groups(&alua_group); 3756 configfs_remove_default_groups(&target_core_hbagroup); 3757 3758 /* 3759 * We expect subsys->su_group.default_groups to be released 3760 * by configfs subsystem provider logic.. 3761 */ 3762 configfs_unregister_subsystem(&target_core_fabrics); 3763 3764 core_alua_free_lu_gp(default_lu_gp); 3765 default_lu_gp = NULL; 3766 3767 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3768 " Infrastructure\n"); 3769 3770 core_dev_release_virtual_lun0(); 3771 rd_module_exit(); 3772 target_xcopy_release_pt(); 3773 release_se_kmem_caches(); 3774 } 3775 3776 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3777 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3778 MODULE_LICENSE("GPL"); 3779 3780 module_init(target_core_init_configfs); 3781 module_exit(target_core_exit_configfs); 3782