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 = scnprintf(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 strscpy(db_root, db_root_stage); 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 DEF_CONFIGFS_ATTRIB_SHOW(atomic_max_len); 582 DEF_CONFIGFS_ATTRIB_SHOW(atomic_alignment); 583 DEF_CONFIGFS_ATTRIB_SHOW(atomic_granularity); 584 DEF_CONFIGFS_ATTRIB_SHOW(atomic_max_with_boundary); 585 DEF_CONFIGFS_ATTRIB_SHOW(atomic_max_boundary); 586 587 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \ 588 static ssize_t _name##_store(struct config_item *item, const char *page,\ 589 size_t count) \ 590 { \ 591 struct se_dev_attrib *da = to_attrib(item); \ 592 u32 val; \ 593 int ret; \ 594 \ 595 ret = kstrtou32(page, 0, &val); \ 596 if (ret < 0) \ 597 return ret; \ 598 da->_name = val; \ 599 return count; \ 600 } 601 602 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count); 603 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count); 604 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity); 605 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment); 606 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len); 607 608 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \ 609 static ssize_t _name##_store(struct config_item *item, const char *page, \ 610 size_t count) \ 611 { \ 612 struct se_dev_attrib *da = to_attrib(item); \ 613 bool flag; \ 614 int ret; \ 615 \ 616 ret = kstrtobool(page, &flag); \ 617 if (ret < 0) \ 618 return ret; \ 619 da->_name = flag; \ 620 return count; \ 621 } 622 623 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write); 624 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw); 625 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc); 626 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr); 627 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids); 628 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot); 629 630 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \ 631 static ssize_t _name##_store(struct config_item *item, const char *page,\ 632 size_t count) \ 633 { \ 634 printk_once(KERN_WARNING \ 635 "ignoring deprecated %s attribute\n", \ 636 __stringify(_name)); \ 637 return count; \ 638 } 639 640 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo); 641 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read); 642 643 static void dev_set_t10_wwn_model_alias(struct se_device *dev) 644 { 645 const char *configname; 646 647 configname = config_item_name(&dev->dev_group.cg_item); 648 if (strlen(configname) >= INQUIRY_MODEL_LEN) { 649 pr_warn("dev[%p]: Backstore name '%s' is too long for " 650 "INQUIRY_MODEL, truncating to 15 characters\n", dev, 651 configname); 652 } 653 /* 654 * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1) 655 * here without potentially breaking existing setups, so continue to 656 * truncate one byte shorter than what can be carried in INQUIRY. 657 */ 658 strscpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN); 659 } 660 661 static ssize_t emulate_model_alias_store(struct config_item *item, 662 const char *page, size_t count) 663 { 664 struct se_dev_attrib *da = to_attrib(item); 665 struct se_device *dev = da->da_dev; 666 bool flag; 667 int ret; 668 669 if (dev->export_count) { 670 pr_err("dev[%p]: Unable to change model alias" 671 " while export_count is %d\n", 672 dev, dev->export_count); 673 return -EINVAL; 674 } 675 676 ret = kstrtobool(page, &flag); 677 if (ret < 0) 678 return ret; 679 680 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); 681 if (flag) 682 dev_set_t10_wwn_model_alias(dev); 683 else 684 strscpy(dev->t10_wwn.model, dev->transport->inquiry_prod); 685 da->emulate_model_alias = flag; 686 return count; 687 } 688 689 static ssize_t emulate_write_cache_store(struct config_item *item, 690 const char *page, size_t count) 691 { 692 struct se_dev_attrib *da = to_attrib(item); 693 bool flag; 694 int ret; 695 696 ret = kstrtobool(page, &flag); 697 if (ret < 0) 698 return ret; 699 700 if (flag && da->da_dev->transport->get_write_cache) { 701 pr_err("emulate_write_cache not supported for this device\n"); 702 return -EINVAL; 703 } 704 705 da->emulate_write_cache = flag; 706 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 707 da->da_dev, flag); 708 return count; 709 } 710 711 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item, 712 const char *page, size_t count) 713 { 714 struct se_dev_attrib *da = to_attrib(item); 715 u32 val; 716 int ret; 717 718 ret = kstrtou32(page, 0, &val); 719 if (ret < 0) 720 return ret; 721 722 if (val != TARGET_UA_INTLCK_CTRL_CLEAR 723 && val != TARGET_UA_INTLCK_CTRL_NO_CLEAR 724 && val != TARGET_UA_INTLCK_CTRL_ESTABLISH_UA) { 725 pr_err("Illegal value %d\n", val); 726 return -EINVAL; 727 } 728 729 if (da->da_dev->export_count) { 730 pr_err("dev[%p]: Unable to change SE Device" 731 " UA_INTRLCK_CTRL while export_count is %d\n", 732 da->da_dev, da->da_dev->export_count); 733 return -EINVAL; 734 } 735 da->emulate_ua_intlck_ctrl = val; 736 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 737 da->da_dev, val); 738 return count; 739 } 740 741 static ssize_t emulate_tas_store(struct config_item *item, 742 const char *page, size_t count) 743 { 744 struct se_dev_attrib *da = to_attrib(item); 745 bool flag; 746 int ret; 747 748 ret = kstrtobool(page, &flag); 749 if (ret < 0) 750 return ret; 751 752 if (da->da_dev->export_count) { 753 pr_err("dev[%p]: Unable to change SE Device TAS while" 754 " export_count is %d\n", 755 da->da_dev, da->da_dev->export_count); 756 return -EINVAL; 757 } 758 da->emulate_tas = flag; 759 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 760 da->da_dev, flag ? "Enabled" : "Disabled"); 761 762 return count; 763 } 764 765 static int target_try_configure_unmap(struct se_device *dev, 766 const char *config_opt) 767 { 768 if (!dev->transport->configure_unmap) { 769 pr_err("Generic Block Discard not supported\n"); 770 return -ENOSYS; 771 } 772 773 if (!target_dev_configured(dev)) { 774 pr_err("Generic Block Discard setup for %s requires device to be configured\n", 775 config_opt); 776 return -ENODEV; 777 } 778 779 if (!dev->transport->configure_unmap(dev)) { 780 pr_err("Generic Block Discard setup for %s failed\n", 781 config_opt); 782 return -ENOSYS; 783 } 784 785 return 0; 786 } 787 788 static ssize_t emulate_tpu_store(struct config_item *item, 789 const char *page, size_t count) 790 { 791 struct se_dev_attrib *da = to_attrib(item); 792 struct se_device *dev = da->da_dev; 793 bool flag; 794 int ret; 795 796 ret = kstrtobool(page, &flag); 797 if (ret < 0) 798 return ret; 799 800 /* 801 * We expect this value to be non-zero when generic Block Layer 802 * Discard supported is detected iblock_create_virtdevice(). 803 */ 804 if (flag && !da->max_unmap_block_desc_count) { 805 ret = target_try_configure_unmap(dev, "emulate_tpu"); 806 if (ret) 807 return ret; 808 } 809 810 da->emulate_tpu = flag; 811 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 812 da->da_dev, flag); 813 return count; 814 } 815 816 static ssize_t emulate_tpws_store(struct config_item *item, 817 const char *page, size_t count) 818 { 819 struct se_dev_attrib *da = to_attrib(item); 820 struct se_device *dev = da->da_dev; 821 bool flag; 822 int ret; 823 824 ret = kstrtobool(page, &flag); 825 if (ret < 0) 826 return ret; 827 828 /* 829 * We expect this value to be non-zero when generic Block Layer 830 * Discard supported is detected iblock_create_virtdevice(). 831 */ 832 if (flag && !da->max_unmap_block_desc_count) { 833 ret = target_try_configure_unmap(dev, "emulate_tpws"); 834 if (ret) 835 return ret; 836 } 837 838 da->emulate_tpws = flag; 839 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 840 da->da_dev, flag); 841 return count; 842 } 843 844 static ssize_t pi_prot_type_store(struct config_item *item, 845 const char *page, size_t count) 846 { 847 struct se_dev_attrib *da = to_attrib(item); 848 int old_prot = da->pi_prot_type, ret; 849 struct se_device *dev = da->da_dev; 850 u32 flag; 851 852 ret = kstrtou32(page, 0, &flag); 853 if (ret < 0) 854 return ret; 855 856 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) { 857 pr_err("Illegal value %d for pi_prot_type\n", flag); 858 return -EINVAL; 859 } 860 if (flag == 2) { 861 pr_err("DIF TYPE2 protection currently not supported\n"); 862 return -ENOSYS; 863 } 864 if (da->hw_pi_prot_type) { 865 pr_warn("DIF protection enabled on underlying hardware," 866 " ignoring\n"); 867 return count; 868 } 869 if (!dev->transport->init_prot || !dev->transport->free_prot) { 870 /* 0 is only allowed value for non-supporting backends */ 871 if (flag == 0) 872 return count; 873 874 pr_err("DIF protection not supported by backend: %s\n", 875 dev->transport->name); 876 return -ENOSYS; 877 } 878 if (!target_dev_configured(dev)) { 879 pr_err("DIF protection requires device to be configured\n"); 880 return -ENODEV; 881 } 882 if (dev->export_count) { 883 pr_err("dev[%p]: Unable to change SE Device PROT type while" 884 " export_count is %d\n", dev, dev->export_count); 885 return -EINVAL; 886 } 887 888 da->pi_prot_type = flag; 889 890 if (flag && !old_prot) { 891 ret = dev->transport->init_prot(dev); 892 if (ret) { 893 da->pi_prot_type = old_prot; 894 da->pi_prot_verify = (bool) da->pi_prot_type; 895 return ret; 896 } 897 898 } else if (!flag && old_prot) { 899 dev->transport->free_prot(dev); 900 } 901 902 da->pi_prot_verify = (bool) da->pi_prot_type; 903 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag); 904 return count; 905 } 906 907 /* always zero, but attr needs to remain RW to avoid userspace breakage */ 908 static ssize_t pi_prot_format_show(struct config_item *item, char *page) 909 { 910 return snprintf(page, PAGE_SIZE, "0\n"); 911 } 912 913 static ssize_t pi_prot_format_store(struct config_item *item, 914 const char *page, size_t count) 915 { 916 struct se_dev_attrib *da = to_attrib(item); 917 struct se_device *dev = da->da_dev; 918 bool flag; 919 int ret; 920 921 ret = kstrtobool(page, &flag); 922 if (ret < 0) 923 return ret; 924 925 if (!flag) 926 return count; 927 928 if (!dev->transport->format_prot) { 929 pr_err("DIF protection format not supported by backend %s\n", 930 dev->transport->name); 931 return -ENOSYS; 932 } 933 if (!target_dev_configured(dev)) { 934 pr_err("DIF protection format requires device to be configured\n"); 935 return -ENODEV; 936 } 937 if (dev->export_count) { 938 pr_err("dev[%p]: Unable to format SE Device PROT type while" 939 " export_count is %d\n", dev, dev->export_count); 940 return -EINVAL; 941 } 942 943 ret = dev->transport->format_prot(dev); 944 if (ret) 945 return ret; 946 947 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev); 948 return count; 949 } 950 951 static ssize_t pi_prot_verify_store(struct config_item *item, 952 const char *page, size_t count) 953 { 954 struct se_dev_attrib *da = to_attrib(item); 955 bool flag; 956 int ret; 957 958 ret = kstrtobool(page, &flag); 959 if (ret < 0) 960 return ret; 961 962 if (!flag) { 963 da->pi_prot_verify = flag; 964 return count; 965 } 966 if (da->hw_pi_prot_type) { 967 pr_warn("DIF protection enabled on underlying hardware," 968 " ignoring\n"); 969 return count; 970 } 971 if (!da->pi_prot_type) { 972 pr_warn("DIF protection not supported by backend, ignoring\n"); 973 return count; 974 } 975 da->pi_prot_verify = flag; 976 977 return count; 978 } 979 980 static ssize_t force_pr_aptpl_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 if (da->da_dev->export_count) { 991 pr_err("dev[%p]: Unable to set force_pr_aptpl while" 992 " export_count is %d\n", 993 da->da_dev, da->da_dev->export_count); 994 return -EINVAL; 995 } 996 997 da->force_pr_aptpl = flag; 998 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag); 999 return count; 1000 } 1001 1002 static ssize_t emulate_rest_reord_store(struct config_item *item, 1003 const char *page, size_t count) 1004 { 1005 struct se_dev_attrib *da = to_attrib(item); 1006 bool flag; 1007 int ret; 1008 1009 ret = kstrtobool(page, &flag); 1010 if (ret < 0) 1011 return ret; 1012 1013 if (flag != 0) { 1014 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted" 1015 " reordering not implemented\n", da->da_dev); 1016 return -ENOSYS; 1017 } 1018 da->emulate_rest_reord = flag; 1019 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", 1020 da->da_dev, flag); 1021 return count; 1022 } 1023 1024 static ssize_t unmap_zeroes_data_store(struct config_item *item, 1025 const char *page, size_t count) 1026 { 1027 struct se_dev_attrib *da = to_attrib(item); 1028 struct se_device *dev = da->da_dev; 1029 bool flag; 1030 int ret; 1031 1032 ret = kstrtobool(page, &flag); 1033 if (ret < 0) 1034 return ret; 1035 1036 if (da->da_dev->export_count) { 1037 pr_err("dev[%p]: Unable to change SE Device" 1038 " unmap_zeroes_data while export_count is %d\n", 1039 da->da_dev, da->da_dev->export_count); 1040 return -EINVAL; 1041 } 1042 /* 1043 * We expect this value to be non-zero when generic Block Layer 1044 * Discard supported is detected iblock_configure_device(). 1045 */ 1046 if (flag && !da->max_unmap_block_desc_count) { 1047 ret = target_try_configure_unmap(dev, "unmap_zeroes_data"); 1048 if (ret) 1049 return ret; 1050 } 1051 da->unmap_zeroes_data = flag; 1052 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n", 1053 da->da_dev, flag); 1054 return count; 1055 } 1056 1057 /* 1058 * Note, this can only be called on unexported SE Device Object. 1059 */ 1060 static ssize_t queue_depth_store(struct config_item *item, 1061 const char *page, size_t count) 1062 { 1063 struct se_dev_attrib *da = to_attrib(item); 1064 struct se_device *dev = da->da_dev; 1065 u32 val; 1066 int ret; 1067 1068 ret = kstrtou32(page, 0, &val); 1069 if (ret < 0) 1070 return ret; 1071 1072 if (dev->export_count) { 1073 pr_err("dev[%p]: Unable to change SE Device TCQ while" 1074 " export_count is %d\n", 1075 dev, dev->export_count); 1076 return -EINVAL; 1077 } 1078 if (!val) { 1079 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev); 1080 return -EINVAL; 1081 } 1082 1083 if (val > dev->dev_attrib.queue_depth) { 1084 if (val > dev->dev_attrib.hw_queue_depth) { 1085 pr_err("dev[%p]: Passed queue_depth:" 1086 " %u exceeds TCM/SE_Device MAX" 1087 " TCQ: %u\n", dev, val, 1088 dev->dev_attrib.hw_queue_depth); 1089 return -EINVAL; 1090 } 1091 } 1092 da->queue_depth = dev->queue_depth = val; 1093 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val); 1094 return count; 1095 } 1096 1097 static ssize_t optimal_sectors_store(struct config_item *item, 1098 const char *page, size_t count) 1099 { 1100 struct se_dev_attrib *da = to_attrib(item); 1101 u32 val; 1102 int ret; 1103 1104 ret = kstrtou32(page, 0, &val); 1105 if (ret < 0) 1106 return ret; 1107 1108 if (da->da_dev->export_count) { 1109 pr_err("dev[%p]: Unable to change SE Device" 1110 " optimal_sectors while export_count is %d\n", 1111 da->da_dev, da->da_dev->export_count); 1112 return -EINVAL; 1113 } 1114 if (val > da->hw_max_sectors) { 1115 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1116 " greater than hw_max_sectors: %u\n", 1117 da->da_dev, val, da->hw_max_sectors); 1118 return -EINVAL; 1119 } 1120 1121 da->optimal_sectors = val; 1122 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1123 da->da_dev, val); 1124 return count; 1125 } 1126 1127 static ssize_t block_size_store(struct config_item *item, 1128 const char *page, size_t count) 1129 { 1130 struct se_dev_attrib *da = to_attrib(item); 1131 u32 val; 1132 int ret; 1133 1134 ret = kstrtou32(page, 0, &val); 1135 if (ret < 0) 1136 return ret; 1137 1138 if (da->da_dev->export_count) { 1139 pr_err("dev[%p]: Unable to change SE Device block_size" 1140 " while export_count is %d\n", 1141 da->da_dev, da->da_dev->export_count); 1142 return -EINVAL; 1143 } 1144 1145 if (val != 512 && val != 1024 && val != 2048 && val != 4096) { 1146 pr_err("dev[%p]: Illegal value for block_device: %u" 1147 " for SE device, must be 512, 1024, 2048 or 4096\n", 1148 da->da_dev, val); 1149 return -EINVAL; 1150 } 1151 1152 da->block_size = val; 1153 1154 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1155 da->da_dev, val); 1156 return count; 1157 } 1158 1159 static ssize_t alua_support_show(struct config_item *item, char *page) 1160 { 1161 struct se_dev_attrib *da = to_attrib(item); 1162 u8 flags = da->da_dev->transport_flags; 1163 1164 return snprintf(page, PAGE_SIZE, "%d\n", 1165 flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1); 1166 } 1167 1168 static ssize_t alua_support_store(struct config_item *item, 1169 const char *page, size_t count) 1170 { 1171 struct se_dev_attrib *da = to_attrib(item); 1172 struct se_device *dev = da->da_dev; 1173 bool flag, oldflag; 1174 int ret; 1175 1176 ret = kstrtobool(page, &flag); 1177 if (ret < 0) 1178 return ret; 1179 1180 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA); 1181 if (flag == oldflag) 1182 return count; 1183 1184 if (!(dev->transport->transport_flags_changeable & 1185 TRANSPORT_FLAG_PASSTHROUGH_ALUA)) { 1186 pr_err("dev[%p]: Unable to change SE Device alua_support:" 1187 " alua_support has fixed value\n", dev); 1188 return -ENOSYS; 1189 } 1190 1191 if (flag) 1192 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_ALUA; 1193 else 1194 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_ALUA; 1195 return count; 1196 } 1197 1198 static ssize_t pgr_support_show(struct config_item *item, char *page) 1199 { 1200 struct se_dev_attrib *da = to_attrib(item); 1201 u8 flags = da->da_dev->transport_flags; 1202 1203 return snprintf(page, PAGE_SIZE, "%d\n", 1204 flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1); 1205 } 1206 1207 static ssize_t pgr_support_store(struct config_item *item, 1208 const char *page, size_t count) 1209 { 1210 struct se_dev_attrib *da = to_attrib(item); 1211 struct se_device *dev = da->da_dev; 1212 bool flag, oldflag; 1213 int ret; 1214 1215 ret = kstrtobool(page, &flag); 1216 if (ret < 0) 1217 return ret; 1218 1219 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR); 1220 if (flag == oldflag) 1221 return count; 1222 1223 if (!(dev->transport->transport_flags_changeable & 1224 TRANSPORT_FLAG_PASSTHROUGH_PGR)) { 1225 pr_err("dev[%p]: Unable to change SE Device pgr_support:" 1226 " pgr_support has fixed value\n", dev); 1227 return -ENOSYS; 1228 } 1229 1230 if (flag) 1231 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_PGR; 1232 else 1233 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_PGR; 1234 return count; 1235 } 1236 1237 static ssize_t emulate_rsoc_store(struct config_item *item, 1238 const char *page, size_t count) 1239 { 1240 struct se_dev_attrib *da = to_attrib(item); 1241 bool flag; 1242 int ret; 1243 1244 ret = kstrtobool(page, &flag); 1245 if (ret < 0) 1246 return ret; 1247 1248 da->emulate_rsoc = flag; 1249 pr_debug("dev[%p]: SE Device REPORT_SUPPORTED_OPERATION_CODES_EMULATION flag: %d\n", 1250 da->da_dev, flag); 1251 return count; 1252 } 1253 1254 static ssize_t submit_type_store(struct config_item *item, const char *page, 1255 size_t count) 1256 { 1257 struct se_dev_attrib *da = to_attrib(item); 1258 int ret; 1259 u8 val; 1260 1261 ret = kstrtou8(page, 0, &val); 1262 if (ret < 0) 1263 return ret; 1264 1265 if (val > TARGET_QUEUE_SUBMIT) 1266 return -EINVAL; 1267 1268 da->submit_type = val; 1269 return count; 1270 } 1271 1272 CONFIGFS_ATTR(, emulate_model_alias); 1273 CONFIGFS_ATTR(, emulate_dpo); 1274 CONFIGFS_ATTR(, emulate_fua_write); 1275 CONFIGFS_ATTR(, emulate_fua_read); 1276 CONFIGFS_ATTR(, emulate_write_cache); 1277 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl); 1278 CONFIGFS_ATTR(, emulate_tas); 1279 CONFIGFS_ATTR(, emulate_tpu); 1280 CONFIGFS_ATTR(, emulate_tpws); 1281 CONFIGFS_ATTR(, emulate_caw); 1282 CONFIGFS_ATTR(, emulate_3pc); 1283 CONFIGFS_ATTR(, emulate_pr); 1284 CONFIGFS_ATTR(, emulate_rsoc); 1285 CONFIGFS_ATTR(, pi_prot_type); 1286 CONFIGFS_ATTR_RO(, hw_pi_prot_type); 1287 CONFIGFS_ATTR(, pi_prot_format); 1288 CONFIGFS_ATTR(, pi_prot_verify); 1289 CONFIGFS_ATTR(, enforce_pr_isids); 1290 CONFIGFS_ATTR(, is_nonrot); 1291 CONFIGFS_ATTR(, emulate_rest_reord); 1292 CONFIGFS_ATTR(, force_pr_aptpl); 1293 CONFIGFS_ATTR_RO(, hw_block_size); 1294 CONFIGFS_ATTR(, block_size); 1295 CONFIGFS_ATTR_RO(, hw_max_sectors); 1296 CONFIGFS_ATTR(, optimal_sectors); 1297 CONFIGFS_ATTR_RO(, hw_queue_depth); 1298 CONFIGFS_ATTR(, queue_depth); 1299 CONFIGFS_ATTR(, max_unmap_lba_count); 1300 CONFIGFS_ATTR(, max_unmap_block_desc_count); 1301 CONFIGFS_ATTR(, unmap_granularity); 1302 CONFIGFS_ATTR(, unmap_granularity_alignment); 1303 CONFIGFS_ATTR(, unmap_zeroes_data); 1304 CONFIGFS_ATTR(, max_write_same_len); 1305 CONFIGFS_ATTR(, alua_support); 1306 CONFIGFS_ATTR(, pgr_support); 1307 CONFIGFS_ATTR(, submit_type); 1308 CONFIGFS_ATTR_RO(, atomic_max_len); 1309 CONFIGFS_ATTR_RO(, atomic_alignment); 1310 CONFIGFS_ATTR_RO(, atomic_granularity); 1311 CONFIGFS_ATTR_RO(, atomic_max_with_boundary); 1312 CONFIGFS_ATTR_RO(, atomic_max_boundary); 1313 1314 /* 1315 * dev_attrib attributes for devices using the target core SBC/SPC 1316 * interpreter. Any backend using spc_parse_cdb should be using 1317 * these. 1318 */ 1319 struct configfs_attribute *sbc_attrib_attrs[] = { 1320 &attr_emulate_model_alias, 1321 &attr_emulate_dpo, 1322 &attr_emulate_fua_write, 1323 &attr_emulate_fua_read, 1324 &attr_emulate_write_cache, 1325 &attr_emulate_ua_intlck_ctrl, 1326 &attr_emulate_tas, 1327 &attr_emulate_tpu, 1328 &attr_emulate_tpws, 1329 &attr_emulate_caw, 1330 &attr_emulate_3pc, 1331 &attr_emulate_pr, 1332 &attr_pi_prot_type, 1333 &attr_hw_pi_prot_type, 1334 &attr_pi_prot_format, 1335 &attr_pi_prot_verify, 1336 &attr_enforce_pr_isids, 1337 &attr_is_nonrot, 1338 &attr_emulate_rest_reord, 1339 &attr_force_pr_aptpl, 1340 &attr_hw_block_size, 1341 &attr_block_size, 1342 &attr_hw_max_sectors, 1343 &attr_optimal_sectors, 1344 &attr_hw_queue_depth, 1345 &attr_queue_depth, 1346 &attr_max_unmap_lba_count, 1347 &attr_max_unmap_block_desc_count, 1348 &attr_unmap_granularity, 1349 &attr_unmap_granularity_alignment, 1350 &attr_unmap_zeroes_data, 1351 &attr_max_write_same_len, 1352 &attr_alua_support, 1353 &attr_pgr_support, 1354 &attr_emulate_rsoc, 1355 &attr_submit_type, 1356 &attr_atomic_alignment, 1357 &attr_atomic_max_len, 1358 &attr_atomic_granularity, 1359 &attr_atomic_max_with_boundary, 1360 &attr_atomic_max_boundary, 1361 NULL, 1362 }; 1363 EXPORT_SYMBOL(sbc_attrib_attrs); 1364 1365 /* 1366 * Minimal dev_attrib attributes for devices passing through CDBs. 1367 * In this case we only provide a few read-only attributes for 1368 * backwards compatibility. 1369 */ 1370 struct configfs_attribute *passthrough_attrib_attrs[] = { 1371 &attr_hw_pi_prot_type, 1372 &attr_hw_block_size, 1373 &attr_hw_max_sectors, 1374 &attr_hw_queue_depth, 1375 &attr_emulate_pr, 1376 &attr_alua_support, 1377 &attr_pgr_support, 1378 &attr_submit_type, 1379 NULL, 1380 }; 1381 EXPORT_SYMBOL(passthrough_attrib_attrs); 1382 1383 /* 1384 * pr related dev_attrib attributes for devices passing through CDBs, 1385 * but allowing in core pr emulation. 1386 */ 1387 struct configfs_attribute *passthrough_pr_attrib_attrs[] = { 1388 &attr_enforce_pr_isids, 1389 &attr_force_pr_aptpl, 1390 NULL, 1391 }; 1392 EXPORT_SYMBOL(passthrough_pr_attrib_attrs); 1393 1394 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL); 1395 TB_CIT_SETUP_DRV(dev_action, NULL, NULL); 1396 1397 /* End functions for struct config_item_type tb_dev_attrib_cit */ 1398 1399 /* Start functions for struct config_item_type tb_dev_wwn_cit */ 1400 1401 static struct t10_wwn *to_t10_wwn(struct config_item *item) 1402 { 1403 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group); 1404 } 1405 1406 static ssize_t target_check_inquiry_data(char *buf) 1407 { 1408 size_t len; 1409 int i; 1410 1411 len = strlen(buf); 1412 1413 /* 1414 * SPC 4.3.1: 1415 * ASCII data fields shall contain only ASCII printable characters 1416 * (i.e., code values 20h to 7Eh) and may be terminated with one or 1417 * more ASCII null (00h) characters. 1418 */ 1419 for (i = 0; i < len; i++) { 1420 if (buf[i] < 0x20 || buf[i] > 0x7E) { 1421 pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n"); 1422 return -EINVAL; 1423 } 1424 } 1425 1426 return len; 1427 } 1428 1429 /* 1430 * STANDARD and VPD page 0x83 T10 Vendor Identification 1431 */ 1432 static ssize_t target_wwn_vendor_id_show(struct config_item *item, 1433 char *page) 1434 { 1435 return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]); 1436 } 1437 1438 static ssize_t target_wwn_vendor_id_store(struct config_item *item, 1439 const char *page, size_t count) 1440 { 1441 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1442 struct se_device *dev = t10_wwn->t10_dev; 1443 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1444 unsigned char buf[INQUIRY_VENDOR_LEN + 2]; 1445 char *stripped = NULL; 1446 ssize_t len; 1447 ssize_t ret; 1448 1449 len = strscpy(buf, page); 1450 if (len > 0) { 1451 /* Strip any newline added from userspace. */ 1452 stripped = strstrip(buf); 1453 len = strlen(stripped); 1454 } 1455 if (len < 0 || len > INQUIRY_VENDOR_LEN) { 1456 pr_err("Emulated T10 Vendor Identification exceeds" 1457 " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN) 1458 "\n"); 1459 return -EOVERFLOW; 1460 } 1461 1462 ret = target_check_inquiry_data(stripped); 1463 1464 if (ret < 0) 1465 return ret; 1466 1467 /* 1468 * Check to see if any active exports exist. If they do exist, fail 1469 * here as changing this information on the fly (underneath the 1470 * initiator side OS dependent multipath code) could cause negative 1471 * effects. 1472 */ 1473 if (dev->export_count) { 1474 pr_err("Unable to set T10 Vendor Identification while" 1475 " active %d exports exist\n", dev->export_count); 1476 return -EINVAL; 1477 } 1478 1479 BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1); 1480 strscpy(dev->t10_wwn.vendor, stripped); 1481 1482 pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:" 1483 " %s\n", dev->t10_wwn.vendor); 1484 1485 return count; 1486 } 1487 1488 static ssize_t target_wwn_product_id_show(struct config_item *item, 1489 char *page) 1490 { 1491 return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]); 1492 } 1493 1494 static ssize_t target_wwn_product_id_store(struct config_item *item, 1495 const char *page, size_t count) 1496 { 1497 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1498 struct se_device *dev = t10_wwn->t10_dev; 1499 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1500 unsigned char buf[INQUIRY_MODEL_LEN + 2]; 1501 char *stripped = NULL; 1502 ssize_t len; 1503 ssize_t ret; 1504 1505 len = strscpy(buf, page); 1506 if (len > 0) { 1507 /* Strip any newline added from userspace. */ 1508 stripped = strstrip(buf); 1509 len = strlen(stripped); 1510 } 1511 if (len < 0 || len > INQUIRY_MODEL_LEN) { 1512 pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: " 1513 __stringify(INQUIRY_MODEL_LEN) 1514 "\n"); 1515 return -EOVERFLOW; 1516 } 1517 1518 ret = target_check_inquiry_data(stripped); 1519 1520 if (ret < 0) 1521 return ret; 1522 1523 /* 1524 * Check to see if any active exports exist. If they do exist, fail 1525 * here as changing this information on the fly (underneath the 1526 * initiator side OS dependent multipath code) could cause negative 1527 * effects. 1528 */ 1529 if (dev->export_count) { 1530 pr_err("Unable to set T10 Model while active %d exports exist\n", 1531 dev->export_count); 1532 return -EINVAL; 1533 } 1534 1535 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); 1536 strscpy(dev->t10_wwn.model, stripped); 1537 1538 pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n", 1539 dev->t10_wwn.model); 1540 1541 return count; 1542 } 1543 1544 static ssize_t target_wwn_revision_show(struct config_item *item, 1545 char *page) 1546 { 1547 return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]); 1548 } 1549 1550 static ssize_t target_wwn_revision_store(struct config_item *item, 1551 const char *page, size_t count) 1552 { 1553 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1554 struct se_device *dev = t10_wwn->t10_dev; 1555 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1556 unsigned char buf[INQUIRY_REVISION_LEN + 2]; 1557 char *stripped = NULL; 1558 ssize_t len; 1559 ssize_t ret; 1560 1561 len = strscpy(buf, page); 1562 if (len > 0) { 1563 /* Strip any newline added from userspace. */ 1564 stripped = strstrip(buf); 1565 len = strlen(stripped); 1566 } 1567 if (len < 0 || len > INQUIRY_REVISION_LEN) { 1568 pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: " 1569 __stringify(INQUIRY_REVISION_LEN) 1570 "\n"); 1571 return -EOVERFLOW; 1572 } 1573 1574 ret = target_check_inquiry_data(stripped); 1575 1576 if (ret < 0) 1577 return ret; 1578 1579 /* 1580 * Check to see if any active exports exist. If they do exist, fail 1581 * here as changing this information on the fly (underneath the 1582 * initiator side OS dependent multipath code) could cause negative 1583 * effects. 1584 */ 1585 if (dev->export_count) { 1586 pr_err("Unable to set T10 Revision while active %d exports exist\n", 1587 dev->export_count); 1588 return -EINVAL; 1589 } 1590 1591 BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1); 1592 strscpy(dev->t10_wwn.revision, stripped); 1593 1594 pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n", 1595 dev->t10_wwn.revision); 1596 1597 return count; 1598 } 1599 1600 static ssize_t 1601 target_wwn_company_id_show(struct config_item *item, 1602 char *page) 1603 { 1604 return snprintf(page, PAGE_SIZE, "%#08x\n", 1605 to_t10_wwn(item)->company_id); 1606 } 1607 1608 static ssize_t 1609 target_wwn_company_id_store(struct config_item *item, 1610 const char *page, size_t count) 1611 { 1612 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1613 struct se_device *dev = t10_wwn->t10_dev; 1614 u32 val; 1615 int ret; 1616 1617 /* 1618 * The IEEE COMPANY_ID field should contain a 24-bit canonical 1619 * form OUI assigned by the IEEE. 1620 */ 1621 ret = kstrtou32(page, 0, &val); 1622 if (ret < 0) 1623 return ret; 1624 1625 if (val >= 0x1000000) 1626 return -EOVERFLOW; 1627 1628 /* 1629 * Check to see if any active exports exist. If they do exist, fail 1630 * here as changing this information on the fly (underneath the 1631 * initiator side OS dependent multipath code) could cause negative 1632 * effects. 1633 */ 1634 if (dev->export_count) { 1635 pr_err("Unable to set Company ID while %u exports exist\n", 1636 dev->export_count); 1637 return -EINVAL; 1638 } 1639 1640 t10_wwn->company_id = val; 1641 1642 pr_debug("Target_Core_ConfigFS: Set IEEE Company ID: %#08x\n", 1643 t10_wwn->company_id); 1644 1645 return count; 1646 } 1647 1648 /* 1649 * VPD page 0x80 Unit serial 1650 */ 1651 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item, 1652 char *page) 1653 { 1654 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 1655 &to_t10_wwn(item)->unit_serial[0]); 1656 } 1657 1658 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item, 1659 const char *page, size_t count) 1660 { 1661 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1662 struct se_device *dev = t10_wwn->t10_dev; 1663 unsigned char buf[INQUIRY_VPD_SERIAL_LEN] = { }; 1664 1665 /* 1666 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 1667 * from the struct scsi_device level firmware, do not allow 1668 * VPD Unit Serial to be emulated. 1669 * 1670 * Note this struct scsi_device could also be emulating VPD 1671 * information from its drivers/scsi LLD. But for now we assume 1672 * it is doing 'the right thing' wrt a world wide unique 1673 * VPD Unit Serial Number that OS dependent multipath can depend on. 1674 */ 1675 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) { 1676 pr_err("Underlying SCSI device firmware provided VPD" 1677 " Unit Serial, ignoring request\n"); 1678 return -EOPNOTSUPP; 1679 } 1680 1681 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 1682 pr_err("Emulated VPD Unit Serial exceeds" 1683 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 1684 return -EOVERFLOW; 1685 } 1686 /* 1687 * Check to see if any active $FABRIC_MOD exports exist. If they 1688 * do exist, fail here as changing this information on the fly 1689 * (underneath the initiator side OS dependent multipath code) 1690 * could cause negative effects. 1691 */ 1692 if (dev->export_count) { 1693 pr_err("Unable to set VPD Unit Serial while" 1694 " active %d $FABRIC_MOD exports exist\n", 1695 dev->export_count); 1696 return -EINVAL; 1697 } 1698 1699 /* 1700 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 1701 * 1702 * Also, strip any newline added from the userspace 1703 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 1704 */ 1705 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 1706 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 1707 "%s", strstrip(buf)); 1708 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL; 1709 1710 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 1711 " %s\n", dev->t10_wwn.unit_serial); 1712 1713 return count; 1714 } 1715 1716 /* 1717 * VPD page 0x83 Protocol Identifier 1718 */ 1719 static ssize_t target_wwn_vpd_protocol_identifier_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->protocol_identifier_set) 1730 continue; 1731 1732 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 1733 1734 if (len + strlen(buf) >= PAGE_SIZE) 1735 break; 1736 1737 len += sprintf(page+len, "%s", buf); 1738 } 1739 spin_unlock(&t10_wwn->t10_vpd_lock); 1740 1741 return len; 1742 } 1743 1744 /* 1745 * Generic wrapper for dumping VPD identifiers by association. 1746 */ 1747 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 1748 static ssize_t target_wwn_##_name##_show(struct config_item *item, \ 1749 char *page) \ 1750 { \ 1751 struct t10_wwn *t10_wwn = to_t10_wwn(item); \ 1752 struct t10_vpd *vpd; \ 1753 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 1754 ssize_t len = 0; \ 1755 \ 1756 spin_lock(&t10_wwn->t10_vpd_lock); \ 1757 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 1758 if (vpd->association != _assoc) \ 1759 continue; \ 1760 \ 1761 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1762 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 1763 if (len + strlen(buf) >= PAGE_SIZE) \ 1764 break; \ 1765 len += sprintf(page+len, "%s", buf); \ 1766 \ 1767 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1768 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 1769 if (len + strlen(buf) >= PAGE_SIZE) \ 1770 break; \ 1771 len += sprintf(page+len, "%s", buf); \ 1772 \ 1773 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1774 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 1775 if (len + strlen(buf) >= PAGE_SIZE) \ 1776 break; \ 1777 len += sprintf(page+len, "%s", buf); \ 1778 } \ 1779 spin_unlock(&t10_wwn->t10_vpd_lock); \ 1780 \ 1781 return len; \ 1782 } 1783 1784 /* VPD page 0x83 Association: Logical Unit */ 1785 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 1786 /* VPD page 0x83 Association: Target Port */ 1787 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 1788 /* VPD page 0x83 Association: SCSI Target Device */ 1789 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 1790 1791 CONFIGFS_ATTR(target_wwn_, vendor_id); 1792 CONFIGFS_ATTR(target_wwn_, product_id); 1793 CONFIGFS_ATTR(target_wwn_, revision); 1794 CONFIGFS_ATTR(target_wwn_, company_id); 1795 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial); 1796 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier); 1797 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit); 1798 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port); 1799 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device); 1800 1801 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 1802 &target_wwn_attr_vendor_id, 1803 &target_wwn_attr_product_id, 1804 &target_wwn_attr_revision, 1805 &target_wwn_attr_company_id, 1806 &target_wwn_attr_vpd_unit_serial, 1807 &target_wwn_attr_vpd_protocol_identifier, 1808 &target_wwn_attr_vpd_assoc_logical_unit, 1809 &target_wwn_attr_vpd_assoc_target_port, 1810 &target_wwn_attr_vpd_assoc_scsi_target_device, 1811 NULL, 1812 }; 1813 1814 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs); 1815 1816 /* End functions for struct config_item_type tb_dev_wwn_cit */ 1817 1818 /* Start functions for struct config_item_type tb_dev_pr_cit */ 1819 1820 static struct se_device *pr_to_dev(struct config_item *item) 1821 { 1822 return container_of(to_config_group(item), struct se_device, 1823 dev_pr_group); 1824 } 1825 1826 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev, 1827 char *page) 1828 { 1829 struct se_node_acl *se_nacl; 1830 struct t10_pr_registration *pr_reg; 1831 char i_buf[PR_REG_ISID_ID_LEN] = { }; 1832 1833 pr_reg = dev->dev_pr_res_holder; 1834 if (!pr_reg) 1835 return sprintf(page, "No SPC-3 Reservation holder\n"); 1836 1837 se_nacl = pr_reg->pr_reg_nacl; 1838 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1839 1840 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", 1841 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1842 se_nacl->initiatorname, i_buf); 1843 } 1844 1845 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, 1846 char *page) 1847 { 1848 struct se_session *sess = dev->reservation_holder; 1849 struct se_node_acl *se_nacl; 1850 ssize_t len; 1851 1852 if (sess) { 1853 se_nacl = sess->se_node_acl; 1854 len = sprintf(page, 1855 "SPC-2 Reservation: %s Initiator: %s\n", 1856 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1857 se_nacl->initiatorname); 1858 } else { 1859 len = sprintf(page, "No SPC-2 Reservation holder\n"); 1860 } 1861 return len; 1862 } 1863 1864 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page) 1865 { 1866 struct se_device *dev = pr_to_dev(item); 1867 int ret; 1868 1869 if (!dev->dev_attrib.emulate_pr) 1870 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 1871 1872 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1873 return sprintf(page, "Passthrough\n"); 1874 1875 spin_lock(&dev->dev_reservation_lock); 1876 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1877 ret = target_core_dev_pr_show_spc2_res(dev, page); 1878 else 1879 ret = target_core_dev_pr_show_spc3_res(dev, page); 1880 spin_unlock(&dev->dev_reservation_lock); 1881 return ret; 1882 } 1883 1884 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item, 1885 char *page) 1886 { 1887 struct se_device *dev = pr_to_dev(item); 1888 ssize_t len = 0; 1889 1890 spin_lock(&dev->dev_reservation_lock); 1891 if (!dev->dev_pr_res_holder) { 1892 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1893 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { 1894 len = sprintf(page, "SPC-3 Reservation: All Target" 1895 " Ports registration\n"); 1896 } else { 1897 len = sprintf(page, "SPC-3 Reservation: Single" 1898 " Target Port registration\n"); 1899 } 1900 1901 spin_unlock(&dev->dev_reservation_lock); 1902 return len; 1903 } 1904 1905 static ssize_t target_pr_res_pr_generation_show(struct config_item *item, 1906 char *page) 1907 { 1908 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation); 1909 } 1910 1911 1912 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item, 1913 char *page) 1914 { 1915 struct se_device *dev = pr_to_dev(item); 1916 struct se_node_acl *se_nacl; 1917 struct se_portal_group *se_tpg; 1918 struct t10_pr_registration *pr_reg; 1919 const struct target_core_fabric_ops *tfo; 1920 ssize_t len = 0; 1921 1922 spin_lock(&dev->dev_reservation_lock); 1923 pr_reg = dev->dev_pr_res_holder; 1924 if (!pr_reg) { 1925 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1926 goto out_unlock; 1927 } 1928 1929 se_nacl = pr_reg->pr_reg_nacl; 1930 se_tpg = se_nacl->se_tpg; 1931 tfo = se_tpg->se_tpg_tfo; 1932 1933 len += sprintf(page+len, "SPC-3 Reservation: %s" 1934 " Target Node Endpoint: %s\n", tfo->fabric_name, 1935 tfo->tpg_get_wwn(se_tpg)); 1936 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1937 " Identifier Tag: %hu %s Portal Group Tag: %hu" 1938 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi, 1939 tfo->fabric_name, tfo->tpg_get_tag(se_tpg), 1940 tfo->fabric_name, pr_reg->pr_aptpl_target_lun); 1941 1942 out_unlock: 1943 spin_unlock(&dev->dev_reservation_lock); 1944 return len; 1945 } 1946 1947 1948 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item, 1949 char *page) 1950 { 1951 struct se_device *dev = pr_to_dev(item); 1952 const struct target_core_fabric_ops *tfo; 1953 struct t10_pr_registration *pr_reg; 1954 unsigned char buf[384]; 1955 char i_buf[PR_REG_ISID_ID_LEN]; 1956 ssize_t len = 0; 1957 int reg_count = 0; 1958 1959 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1960 1961 spin_lock(&dev->t10_pr.registration_lock); 1962 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1963 pr_reg_list) { 1964 1965 memset(buf, 0, 384); 1966 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1967 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1968 core_pr_dump_initiator_port(pr_reg, i_buf, 1969 PR_REG_ISID_ID_LEN); 1970 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1971 tfo->fabric_name, 1972 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, 1973 pr_reg->pr_res_generation); 1974 1975 if (len + strlen(buf) >= PAGE_SIZE) 1976 break; 1977 1978 len += sprintf(page+len, "%s", buf); 1979 reg_count++; 1980 } 1981 spin_unlock(&dev->t10_pr.registration_lock); 1982 1983 if (!reg_count) 1984 len += sprintf(page+len, "None\n"); 1985 1986 return len; 1987 } 1988 1989 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page) 1990 { 1991 struct se_device *dev = pr_to_dev(item); 1992 struct t10_pr_registration *pr_reg; 1993 ssize_t len = 0; 1994 1995 spin_lock(&dev->dev_reservation_lock); 1996 pr_reg = dev->dev_pr_res_holder; 1997 if (pr_reg) { 1998 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1999 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 2000 } else { 2001 len = sprintf(page, "No SPC-3 Reservation holder\n"); 2002 } 2003 2004 spin_unlock(&dev->dev_reservation_lock); 2005 return len; 2006 } 2007 2008 static ssize_t target_pr_res_type_show(struct config_item *item, char *page) 2009 { 2010 struct se_device *dev = pr_to_dev(item); 2011 2012 if (!dev->dev_attrib.emulate_pr) 2013 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 2014 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 2015 return sprintf(page, "SPC_PASSTHROUGH\n"); 2016 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 2017 return sprintf(page, "SPC2_RESERVATIONS\n"); 2018 2019 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 2020 } 2021 2022 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item, 2023 char *page) 2024 { 2025 struct se_device *dev = pr_to_dev(item); 2026 2027 if (!dev->dev_attrib.emulate_pr || 2028 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 2029 return 0; 2030 2031 return sprintf(page, "APTPL Bit Status: %s\n", 2032 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 2033 } 2034 2035 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item, 2036 char *page) 2037 { 2038 struct se_device *dev = pr_to_dev(item); 2039 2040 if (!dev->dev_attrib.emulate_pr || 2041 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 2042 return 0; 2043 2044 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 2045 } 2046 2047 enum { 2048 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 2049 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 2050 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 2051 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 2052 }; 2053 2054 static match_table_t tokens = { 2055 {Opt_initiator_fabric, "initiator_fabric=%s"}, 2056 {Opt_initiator_node, "initiator_node=%s"}, 2057 {Opt_initiator_sid, "initiator_sid=%s"}, 2058 {Opt_sa_res_key, "sa_res_key=%s"}, 2059 {Opt_res_holder, "res_holder=%d"}, 2060 {Opt_res_type, "res_type=%d"}, 2061 {Opt_res_scope, "res_scope=%d"}, 2062 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 2063 {Opt_mapped_lun, "mapped_lun=%u"}, 2064 {Opt_target_fabric, "target_fabric=%s"}, 2065 {Opt_target_node, "target_node=%s"}, 2066 {Opt_tpgt, "tpgt=%d"}, 2067 {Opt_port_rtpi, "port_rtpi=%d"}, 2068 {Opt_target_lun, "target_lun=%u"}, 2069 {Opt_err, NULL} 2070 }; 2071 2072 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item, 2073 const char *page, size_t count) 2074 { 2075 struct se_device *dev = pr_to_dev(item); 2076 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 2077 unsigned char *t_fabric = NULL, *t_port = NULL; 2078 char *orig, *ptr, *opts; 2079 substring_t args[MAX_OPT_ARGS]; 2080 unsigned long long tmp_ll; 2081 u64 sa_res_key = 0; 2082 u64 mapped_lun = 0, target_lun = 0; 2083 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 2084 u16 tpgt = 0; 2085 u8 type = 0; 2086 2087 if (!dev->dev_attrib.emulate_pr || 2088 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 2089 return count; 2090 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 2091 return count; 2092 2093 if (dev->export_count) { 2094 pr_debug("Unable to process APTPL metadata while" 2095 " active fabric exports exist\n"); 2096 return -EINVAL; 2097 } 2098 2099 opts = kstrdup(page, GFP_KERNEL); 2100 if (!opts) 2101 return -ENOMEM; 2102 2103 orig = opts; 2104 while ((ptr = strsep(&opts, ",\n")) != NULL) { 2105 if (!*ptr) 2106 continue; 2107 2108 token = match_token(ptr, tokens, args); 2109 switch (token) { 2110 case Opt_initiator_fabric: 2111 i_fabric = match_strdup(args); 2112 if (!i_fabric) { 2113 ret = -ENOMEM; 2114 goto out; 2115 } 2116 break; 2117 case Opt_initiator_node: 2118 i_port = match_strdup(args); 2119 if (!i_port) { 2120 ret = -ENOMEM; 2121 goto out; 2122 } 2123 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 2124 pr_err("APTPL metadata initiator_node=" 2125 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 2126 PR_APTPL_MAX_IPORT_LEN); 2127 ret = -EINVAL; 2128 break; 2129 } 2130 break; 2131 case Opt_initiator_sid: 2132 isid = match_strdup(args); 2133 if (!isid) { 2134 ret = -ENOMEM; 2135 goto out; 2136 } 2137 if (strlen(isid) >= PR_REG_ISID_LEN) { 2138 pr_err("APTPL metadata initiator_isid" 2139 "= exceeds PR_REG_ISID_LEN: %d\n", 2140 PR_REG_ISID_LEN); 2141 ret = -EINVAL; 2142 break; 2143 } 2144 break; 2145 case Opt_sa_res_key: 2146 ret = match_u64(args, &tmp_ll); 2147 if (ret < 0) { 2148 pr_err("kstrtoull() failed for sa_res_key=\n"); 2149 goto out; 2150 } 2151 sa_res_key = (u64)tmp_ll; 2152 break; 2153 /* 2154 * PR APTPL Metadata for Reservation 2155 */ 2156 case Opt_res_holder: 2157 ret = match_int(args, &arg); 2158 if (ret) 2159 goto out; 2160 res_holder = arg; 2161 break; 2162 case Opt_res_type: 2163 ret = match_int(args, &arg); 2164 if (ret) 2165 goto out; 2166 type = (u8)arg; 2167 break; 2168 case Opt_res_scope: 2169 ret = match_int(args, &arg); 2170 if (ret) 2171 goto out; 2172 break; 2173 case Opt_res_all_tg_pt: 2174 ret = match_int(args, &arg); 2175 if (ret) 2176 goto out; 2177 all_tg_pt = (int)arg; 2178 break; 2179 case Opt_mapped_lun: 2180 ret = match_u64(args, &tmp_ll); 2181 if (ret) 2182 goto out; 2183 mapped_lun = (u64)tmp_ll; 2184 break; 2185 /* 2186 * PR APTPL Metadata for Target Port 2187 */ 2188 case Opt_target_fabric: 2189 t_fabric = match_strdup(args); 2190 if (!t_fabric) { 2191 ret = -ENOMEM; 2192 goto out; 2193 } 2194 break; 2195 case Opt_target_node: 2196 t_port = match_strdup(args); 2197 if (!t_port) { 2198 ret = -ENOMEM; 2199 goto out; 2200 } 2201 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 2202 pr_err("APTPL metadata target_node=" 2203 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 2204 PR_APTPL_MAX_TPORT_LEN); 2205 ret = -EINVAL; 2206 break; 2207 } 2208 break; 2209 case Opt_tpgt: 2210 ret = match_int(args, &arg); 2211 if (ret) 2212 goto out; 2213 tpgt = (u16)arg; 2214 break; 2215 case Opt_port_rtpi: 2216 ret = match_int(args, &arg); 2217 if (ret) 2218 goto out; 2219 break; 2220 case Opt_target_lun: 2221 ret = match_u64(args, &tmp_ll); 2222 if (ret) 2223 goto out; 2224 target_lun = (u64)tmp_ll; 2225 break; 2226 default: 2227 break; 2228 } 2229 } 2230 2231 if (!i_port || !t_port || !sa_res_key) { 2232 pr_err("Illegal parameters for APTPL registration\n"); 2233 ret = -EINVAL; 2234 goto out; 2235 } 2236 2237 if (res_holder && !(type)) { 2238 pr_err("Illegal PR type: 0x%02x for reservation" 2239 " holder\n", type); 2240 ret = -EINVAL; 2241 goto out; 2242 } 2243 2244 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, 2245 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 2246 res_holder, all_tg_pt, type); 2247 out: 2248 kfree(i_fabric); 2249 kfree(i_port); 2250 kfree(isid); 2251 kfree(t_fabric); 2252 kfree(t_port); 2253 kfree(orig); 2254 return (ret == 0) ? count : ret; 2255 } 2256 2257 2258 CONFIGFS_ATTR_RO(target_pr_, res_holder); 2259 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts); 2260 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation); 2261 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port); 2262 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts); 2263 CONFIGFS_ATTR_RO(target_pr_, res_pr_type); 2264 CONFIGFS_ATTR_RO(target_pr_, res_type); 2265 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active); 2266 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata); 2267 2268 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 2269 &target_pr_attr_res_holder, 2270 &target_pr_attr_res_pr_all_tgt_pts, 2271 &target_pr_attr_res_pr_generation, 2272 &target_pr_attr_res_pr_holder_tg_port, 2273 &target_pr_attr_res_pr_registered_i_pts, 2274 &target_pr_attr_res_pr_type, 2275 &target_pr_attr_res_type, 2276 &target_pr_attr_res_aptpl_active, 2277 &target_pr_attr_res_aptpl_metadata, 2278 NULL, 2279 }; 2280 2281 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs); 2282 2283 /* End functions for struct config_item_type tb_dev_pr_cit */ 2284 2285 /* Start functions for struct config_item_type tb_dev_cit */ 2286 2287 static inline struct se_device *to_device(struct config_item *item) 2288 { 2289 return container_of(to_config_group(item), struct se_device, dev_group); 2290 } 2291 2292 static ssize_t target_dev_info_show(struct config_item *item, char *page) 2293 { 2294 struct se_device *dev = to_device(item); 2295 int bl = 0; 2296 ssize_t read_bytes = 0; 2297 2298 transport_dump_dev_state(dev, page, &bl); 2299 read_bytes += bl; 2300 read_bytes += dev->transport->show_configfs_dev_params(dev, 2301 page+read_bytes); 2302 return read_bytes; 2303 } 2304 2305 static ssize_t target_dev_control_store(struct config_item *item, 2306 const char *page, size_t count) 2307 { 2308 struct se_device *dev = to_device(item); 2309 2310 return dev->transport->set_configfs_dev_params(dev, page, count); 2311 } 2312 2313 static ssize_t target_dev_alias_show(struct config_item *item, char *page) 2314 { 2315 struct se_device *dev = to_device(item); 2316 2317 if (!(dev->dev_flags & DF_USING_ALIAS)) 2318 return 0; 2319 2320 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); 2321 } 2322 2323 static ssize_t target_dev_alias_store(struct config_item *item, 2324 const char *page, size_t count) 2325 { 2326 struct se_device *dev = to_device(item); 2327 struct se_hba *hba = dev->se_hba; 2328 ssize_t read_bytes; 2329 2330 if (count > (SE_DEV_ALIAS_LEN-1)) { 2331 pr_err("alias count: %d exceeds" 2332 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 2333 SE_DEV_ALIAS_LEN-1); 2334 return -EINVAL; 2335 } 2336 2337 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); 2338 if (!read_bytes) 2339 return -EINVAL; 2340 if (dev->dev_alias[read_bytes - 1] == '\n') 2341 dev->dev_alias[read_bytes - 1] = '\0'; 2342 2343 dev->dev_flags |= DF_USING_ALIAS; 2344 2345 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 2346 config_item_name(&hba->hba_group.cg_item), 2347 config_item_name(&dev->dev_group.cg_item), 2348 dev->dev_alias); 2349 2350 return read_bytes; 2351 } 2352 2353 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page) 2354 { 2355 struct se_device *dev = to_device(item); 2356 2357 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) 2358 return 0; 2359 2360 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); 2361 } 2362 2363 static ssize_t target_dev_udev_path_store(struct config_item *item, 2364 const char *page, size_t count) 2365 { 2366 struct se_device *dev = to_device(item); 2367 struct se_hba *hba = dev->se_hba; 2368 ssize_t read_bytes; 2369 2370 if (count > (SE_UDEV_PATH_LEN-1)) { 2371 pr_err("udev_path count: %d exceeds" 2372 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 2373 SE_UDEV_PATH_LEN-1); 2374 return -EINVAL; 2375 } 2376 2377 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, 2378 "%s", page); 2379 if (!read_bytes) 2380 return -EINVAL; 2381 if (dev->udev_path[read_bytes - 1] == '\n') 2382 dev->udev_path[read_bytes - 1] = '\0'; 2383 2384 dev->dev_flags |= DF_USING_UDEV_PATH; 2385 2386 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 2387 config_item_name(&hba->hba_group.cg_item), 2388 config_item_name(&dev->dev_group.cg_item), 2389 dev->udev_path); 2390 2391 return read_bytes; 2392 } 2393 2394 static ssize_t target_dev_enable_show(struct config_item *item, char *page) 2395 { 2396 struct se_device *dev = to_device(item); 2397 2398 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev)); 2399 } 2400 2401 static ssize_t target_dev_enable_store(struct config_item *item, 2402 const char *page, size_t count) 2403 { 2404 struct se_device *dev = to_device(item); 2405 char *ptr; 2406 int ret; 2407 2408 ptr = strstr(page, "1"); 2409 if (!ptr) { 2410 pr_err("For dev_enable ops, only valid value" 2411 " is \"1\"\n"); 2412 return -EINVAL; 2413 } 2414 2415 ret = target_configure_device(dev); 2416 if (ret) 2417 return ret; 2418 return count; 2419 } 2420 2421 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page) 2422 { 2423 struct se_device *dev = to_device(item); 2424 struct config_item *lu_ci; 2425 struct t10_alua_lu_gp *lu_gp; 2426 struct t10_alua_lu_gp_member *lu_gp_mem; 2427 ssize_t len = 0; 2428 2429 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2430 if (!lu_gp_mem) 2431 return 0; 2432 2433 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2434 lu_gp = lu_gp_mem->lu_gp; 2435 if (lu_gp) { 2436 lu_ci = &lu_gp->lu_gp_group.cg_item; 2437 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 2438 config_item_name(lu_ci), lu_gp->lu_gp_id); 2439 } 2440 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2441 2442 return len; 2443 } 2444 2445 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item, 2446 const char *page, size_t count) 2447 { 2448 struct se_device *dev = to_device(item); 2449 struct se_hba *hba = dev->se_hba; 2450 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 2451 struct t10_alua_lu_gp_member *lu_gp_mem; 2452 unsigned char buf[LU_GROUP_NAME_BUF] = { }; 2453 int move = 0; 2454 2455 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2456 if (!lu_gp_mem) 2457 return count; 2458 2459 if (count > LU_GROUP_NAME_BUF) { 2460 pr_err("ALUA LU Group Alias too large!\n"); 2461 return -EINVAL; 2462 } 2463 memcpy(buf, page, count); 2464 /* 2465 * Any ALUA logical unit alias besides "NULL" means we will be 2466 * making a new group association. 2467 */ 2468 if (strcmp(strstrip(buf), "NULL")) { 2469 /* 2470 * core_alua_get_lu_gp_by_name() will increment reference to 2471 * struct t10_alua_lu_gp. This reference is released with 2472 * core_alua_get_lu_gp_by_name below(). 2473 */ 2474 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 2475 if (!lu_gp_new) 2476 return -ENODEV; 2477 } 2478 2479 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2480 lu_gp = lu_gp_mem->lu_gp; 2481 if (lu_gp) { 2482 /* 2483 * Clearing an existing lu_gp association, and replacing 2484 * with NULL 2485 */ 2486 if (!lu_gp_new) { 2487 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 2488 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 2489 " %hu\n", 2490 config_item_name(&hba->hba_group.cg_item), 2491 config_item_name(&dev->dev_group.cg_item), 2492 config_item_name(&lu_gp->lu_gp_group.cg_item), 2493 lu_gp->lu_gp_id); 2494 2495 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2496 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2497 2498 return count; 2499 } 2500 /* 2501 * Removing existing association of lu_gp_mem with lu_gp 2502 */ 2503 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2504 move = 1; 2505 } 2506 /* 2507 * Associate lu_gp_mem with lu_gp_new. 2508 */ 2509 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 2510 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2511 2512 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 2513 " core/alua/lu_gps/%s, ID: %hu\n", 2514 (move) ? "Moving" : "Adding", 2515 config_item_name(&hba->hba_group.cg_item), 2516 config_item_name(&dev->dev_group.cg_item), 2517 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 2518 lu_gp_new->lu_gp_id); 2519 2520 core_alua_put_lu_gp_from_name(lu_gp_new); 2521 return count; 2522 } 2523 2524 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page) 2525 { 2526 struct se_device *dev = to_device(item); 2527 struct t10_alua_lba_map *map; 2528 struct t10_alua_lba_map_member *mem; 2529 char *b = page; 2530 int bl = 0; 2531 char state; 2532 2533 spin_lock(&dev->t10_alua.lba_map_lock); 2534 if (!list_empty(&dev->t10_alua.lba_map_list)) 2535 bl += sprintf(b + bl, "%u %u\n", 2536 dev->t10_alua.lba_map_segment_size, 2537 dev->t10_alua.lba_map_segment_multiplier); 2538 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) { 2539 bl += sprintf(b + bl, "%llu %llu", 2540 map->lba_map_first_lba, map->lba_map_last_lba); 2541 list_for_each_entry(mem, &map->lba_map_mem_list, 2542 lba_map_mem_list) { 2543 switch (mem->lba_map_mem_alua_state) { 2544 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: 2545 state = 'O'; 2546 break; 2547 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: 2548 state = 'A'; 2549 break; 2550 case ALUA_ACCESS_STATE_STANDBY: 2551 state = 'S'; 2552 break; 2553 case ALUA_ACCESS_STATE_UNAVAILABLE: 2554 state = 'U'; 2555 break; 2556 default: 2557 state = '.'; 2558 break; 2559 } 2560 bl += sprintf(b + bl, " %d:%c", 2561 mem->lba_map_mem_alua_pg_id, state); 2562 } 2563 bl += sprintf(b + bl, "\n"); 2564 } 2565 spin_unlock(&dev->t10_alua.lba_map_lock); 2566 return bl; 2567 } 2568 2569 static ssize_t target_dev_lba_map_store(struct config_item *item, 2570 const char *page, size_t count) 2571 { 2572 struct se_device *dev = to_device(item); 2573 struct t10_alua_lba_map *lba_map = NULL; 2574 struct list_head lba_list; 2575 char *map_entries, *orig, *ptr; 2576 char state; 2577 int pg_num = -1, pg; 2578 int ret = 0, num = 0, pg_id, alua_state; 2579 unsigned long start_lba = -1, end_lba = -1; 2580 unsigned long segment_size = -1, segment_mult = -1; 2581 2582 orig = map_entries = kstrdup(page, GFP_KERNEL); 2583 if (!map_entries) 2584 return -ENOMEM; 2585 2586 INIT_LIST_HEAD(&lba_list); 2587 while ((ptr = strsep(&map_entries, "\n")) != NULL) { 2588 if (!*ptr) 2589 continue; 2590 2591 if (num == 0) { 2592 if (sscanf(ptr, "%lu %lu\n", 2593 &segment_size, &segment_mult) != 2) { 2594 pr_err("Invalid line %d\n", num); 2595 ret = -EINVAL; 2596 break; 2597 } 2598 num++; 2599 continue; 2600 } 2601 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) { 2602 pr_err("Invalid line %d\n", num); 2603 ret = -EINVAL; 2604 break; 2605 } 2606 ptr = strchr(ptr, ' '); 2607 if (!ptr) { 2608 pr_err("Invalid line %d, missing end lba\n", num); 2609 ret = -EINVAL; 2610 break; 2611 } 2612 ptr++; 2613 ptr = strchr(ptr, ' '); 2614 if (!ptr) { 2615 pr_err("Invalid line %d, missing state definitions\n", 2616 num); 2617 ret = -EINVAL; 2618 break; 2619 } 2620 ptr++; 2621 lba_map = core_alua_allocate_lba_map(&lba_list, 2622 start_lba, end_lba); 2623 if (IS_ERR(lba_map)) { 2624 ret = PTR_ERR(lba_map); 2625 break; 2626 } 2627 pg = 0; 2628 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) { 2629 switch (state) { 2630 case 'O': 2631 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED; 2632 break; 2633 case 'A': 2634 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED; 2635 break; 2636 case 'S': 2637 alua_state = ALUA_ACCESS_STATE_STANDBY; 2638 break; 2639 case 'U': 2640 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE; 2641 break; 2642 default: 2643 pr_err("Invalid ALUA state '%c'\n", state); 2644 ret = -EINVAL; 2645 goto out; 2646 } 2647 2648 ret = core_alua_allocate_lba_map_mem(lba_map, 2649 pg_id, alua_state); 2650 if (ret) { 2651 pr_err("Invalid target descriptor %d:%c " 2652 "at line %d\n", 2653 pg_id, state, num); 2654 break; 2655 } 2656 pg++; 2657 ptr = strchr(ptr, ' '); 2658 if (ptr) 2659 ptr++; 2660 else 2661 break; 2662 } 2663 if (pg_num == -1) 2664 pg_num = pg; 2665 else if (pg != pg_num) { 2666 pr_err("Only %d from %d port groups definitions " 2667 "at line %d\n", pg, pg_num, num); 2668 ret = -EINVAL; 2669 break; 2670 } 2671 num++; 2672 } 2673 out: 2674 if (ret) { 2675 core_alua_free_lba_map(&lba_list); 2676 count = ret; 2677 } else 2678 core_alua_set_lba_map(dev, &lba_list, 2679 segment_size, segment_mult); 2680 kfree(orig); 2681 return count; 2682 } 2683 2684 CONFIGFS_ATTR_RO(target_dev_, info); 2685 CONFIGFS_ATTR_WO(target_dev_, control); 2686 CONFIGFS_ATTR(target_dev_, alias); 2687 CONFIGFS_ATTR(target_dev_, udev_path); 2688 CONFIGFS_ATTR(target_dev_, enable); 2689 CONFIGFS_ATTR(target_dev_, alua_lu_gp); 2690 CONFIGFS_ATTR(target_dev_, lba_map); 2691 2692 static struct configfs_attribute *target_core_dev_attrs[] = { 2693 &target_dev_attr_info, 2694 &target_dev_attr_control, 2695 &target_dev_attr_alias, 2696 &target_dev_attr_udev_path, 2697 &target_dev_attr_enable, 2698 &target_dev_attr_alua_lu_gp, 2699 &target_dev_attr_lba_map, 2700 NULL, 2701 }; 2702 2703 static void target_core_dev_release(struct config_item *item) 2704 { 2705 struct config_group *dev_cg = to_config_group(item); 2706 struct se_device *dev = 2707 container_of(dev_cg, struct se_device, dev_group); 2708 2709 target_free_device(dev); 2710 } 2711 2712 /* 2713 * Used in target_core_fabric_configfs.c to verify valid se_device symlink 2714 * within target_fabric_port_link() 2715 */ 2716 struct configfs_item_operations target_core_dev_item_ops = { 2717 .release = target_core_dev_release, 2718 }; 2719 2720 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs); 2721 2722 /* End functions for struct config_item_type tb_dev_cit */ 2723 2724 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 2725 2726 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item) 2727 { 2728 return container_of(to_config_group(item), struct t10_alua_lu_gp, 2729 lu_gp_group); 2730 } 2731 2732 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page) 2733 { 2734 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2735 2736 if (!lu_gp->lu_gp_valid_id) 2737 return 0; 2738 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2739 } 2740 2741 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item, 2742 const char *page, size_t count) 2743 { 2744 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2745 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2746 unsigned long lu_gp_id; 2747 int ret; 2748 2749 ret = kstrtoul(page, 0, &lu_gp_id); 2750 if (ret < 0) { 2751 pr_err("kstrtoul() returned %d for" 2752 " lu_gp_id\n", ret); 2753 return ret; 2754 } 2755 if (lu_gp_id > 0x0000ffff) { 2756 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 2757 " 0x0000ffff\n", lu_gp_id); 2758 return -EINVAL; 2759 } 2760 2761 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2762 if (ret < 0) 2763 return -EINVAL; 2764 2765 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 2766 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2767 config_item_name(&alua_lu_gp_cg->cg_item), 2768 lu_gp->lu_gp_id); 2769 2770 return count; 2771 } 2772 2773 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page) 2774 { 2775 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2776 struct t10_alua_lu_gp_member *lu_gp_mem; 2777 const char *const end = page + PAGE_SIZE; 2778 char *cur = page; 2779 2780 spin_lock(&lu_gp->lu_gp_lock); 2781 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2782 struct se_device *dev = lu_gp_mem->lu_gp_mem_dev; 2783 struct se_hba *hba = dev->se_hba; 2784 2785 cur += scnprintf(cur, end - cur, "%s/%s\n", 2786 config_item_name(&hba->hba_group.cg_item), 2787 config_item_name(&dev->dev_group.cg_item)); 2788 if (WARN_ON_ONCE(cur >= end)) 2789 break; 2790 } 2791 spin_unlock(&lu_gp->lu_gp_lock); 2792 2793 return cur - page; 2794 } 2795 2796 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id); 2797 CONFIGFS_ATTR_RO(target_lu_gp_, members); 2798 2799 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2800 &target_lu_gp_attr_lu_gp_id, 2801 &target_lu_gp_attr_members, 2802 NULL, 2803 }; 2804 2805 static void target_core_alua_lu_gp_release(struct config_item *item) 2806 { 2807 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2808 struct t10_alua_lu_gp, lu_gp_group); 2809 2810 core_alua_free_lu_gp(lu_gp); 2811 } 2812 2813 static struct configfs_item_operations target_core_alua_lu_gp_ops = { 2814 .release = target_core_alua_lu_gp_release, 2815 }; 2816 2817 static const struct config_item_type target_core_alua_lu_gp_cit = { 2818 .ct_item_ops = &target_core_alua_lu_gp_ops, 2819 .ct_attrs = target_core_alua_lu_gp_attrs, 2820 .ct_owner = THIS_MODULE, 2821 }; 2822 2823 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2824 2825 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2826 2827 static struct config_group *target_core_alua_create_lu_gp( 2828 struct config_group *group, 2829 const char *name) 2830 { 2831 struct t10_alua_lu_gp *lu_gp; 2832 struct config_group *alua_lu_gp_cg = NULL; 2833 struct config_item *alua_lu_gp_ci = NULL; 2834 2835 lu_gp = core_alua_allocate_lu_gp(name, 0); 2836 if (IS_ERR(lu_gp)) 2837 return NULL; 2838 2839 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2840 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2841 2842 config_group_init_type_name(alua_lu_gp_cg, name, 2843 &target_core_alua_lu_gp_cit); 2844 2845 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2846 " Group: core/alua/lu_gps/%s\n", 2847 config_item_name(alua_lu_gp_ci)); 2848 2849 return alua_lu_gp_cg; 2850 2851 } 2852 2853 static void target_core_alua_drop_lu_gp( 2854 struct config_group *group, 2855 struct config_item *item) 2856 { 2857 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2858 struct t10_alua_lu_gp, lu_gp_group); 2859 2860 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2861 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2862 config_item_name(item), lu_gp->lu_gp_id); 2863 /* 2864 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 2865 * -> target_core_alua_lu_gp_release() 2866 */ 2867 config_item_put(item); 2868 } 2869 2870 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2871 .make_group = &target_core_alua_create_lu_gp, 2872 .drop_item = &target_core_alua_drop_lu_gp, 2873 }; 2874 2875 static const struct config_item_type target_core_alua_lu_gps_cit = { 2876 .ct_item_ops = NULL, 2877 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2878 .ct_owner = THIS_MODULE, 2879 }; 2880 2881 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2882 2883 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2884 2885 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item) 2886 { 2887 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp, 2888 tg_pt_gp_group); 2889 } 2890 2891 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item, 2892 char *page) 2893 { 2894 return sprintf(page, "%d\n", 2895 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state); 2896 } 2897 2898 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item, 2899 const char *page, size_t count) 2900 { 2901 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2902 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; 2903 unsigned long tmp; 2904 int new_state, ret; 2905 2906 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2907 pr_err("Unable to do implicit ALUA on invalid tg_pt_gp ID\n"); 2908 return -EINVAL; 2909 } 2910 if (!target_dev_configured(dev)) { 2911 pr_err("Unable to set alua_access_state while device is" 2912 " not configured\n"); 2913 return -ENODEV; 2914 } 2915 2916 ret = kstrtoul(page, 0, &tmp); 2917 if (ret < 0) { 2918 pr_err("Unable to extract new ALUA access state from" 2919 " %s\n", page); 2920 return ret; 2921 } 2922 new_state = (int)tmp; 2923 2924 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) { 2925 pr_err("Unable to process implicit configfs ALUA" 2926 " transition while TPGS_IMPLICIT_ALUA is disabled\n"); 2927 return -EINVAL; 2928 } 2929 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA && 2930 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) { 2931 /* LBA DEPENDENT is only allowed with implicit ALUA */ 2932 pr_err("Unable to process implicit configfs ALUA transition" 2933 " while explicit ALUA management is enabled\n"); 2934 return -EINVAL; 2935 } 2936 2937 ret = core_alua_do_port_transition(tg_pt_gp, dev, 2938 NULL, NULL, new_state, 0); 2939 return (!ret) ? count : -EINVAL; 2940 } 2941 2942 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item, 2943 char *page) 2944 { 2945 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2946 return sprintf(page, "%s\n", 2947 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2948 } 2949 2950 static ssize_t target_tg_pt_gp_alua_access_status_store( 2951 struct config_item *item, const char *page, size_t count) 2952 { 2953 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2954 unsigned long tmp; 2955 int new_status, ret; 2956 2957 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2958 pr_err("Unable to set ALUA access status on invalid tg_pt_gp ID\n"); 2959 return -EINVAL; 2960 } 2961 2962 ret = kstrtoul(page, 0, &tmp); 2963 if (ret < 0) { 2964 pr_err("Unable to extract new ALUA access status" 2965 " from %s\n", page); 2966 return ret; 2967 } 2968 new_status = (int)tmp; 2969 2970 if ((new_status != ALUA_STATUS_NONE) && 2971 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && 2972 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { 2973 pr_err("Illegal ALUA access status: 0x%02x\n", 2974 new_status); 2975 return -EINVAL; 2976 } 2977 2978 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2979 return count; 2980 } 2981 2982 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item, 2983 char *page) 2984 { 2985 return core_alua_show_access_type(to_tg_pt_gp(item), page); 2986 } 2987 2988 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item, 2989 const char *page, size_t count) 2990 { 2991 return core_alua_store_access_type(to_tg_pt_gp(item), page, count); 2992 } 2993 2994 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \ 2995 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \ 2996 struct config_item *item, char *p) \ 2997 { \ 2998 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 2999 return sprintf(p, "%d\n", \ 3000 !!(t->tg_pt_gp_alua_supported_states & _bit)); \ 3001 } \ 3002 \ 3003 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \ 3004 struct config_item *item, const char *p, size_t c) \ 3005 { \ 3006 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 3007 unsigned long tmp; \ 3008 int ret; \ 3009 \ 3010 if (!t->tg_pt_gp_valid_id) { \ 3011 pr_err("Unable to set " #_name " ALUA state on invalid tg_pt_gp ID\n"); \ 3012 return -EINVAL; \ 3013 } \ 3014 \ 3015 ret = kstrtoul(p, 0, &tmp); \ 3016 if (ret < 0) { \ 3017 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \ 3018 return -EINVAL; \ 3019 } \ 3020 if (tmp > 1) { \ 3021 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \ 3022 return -EINVAL; \ 3023 } \ 3024 if (tmp) \ 3025 t->tg_pt_gp_alua_supported_states |= _bit; \ 3026 else \ 3027 t->tg_pt_gp_alua_supported_states &= ~_bit; \ 3028 \ 3029 return c; \ 3030 } 3031 3032 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP); 3033 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP); 3034 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP); 3035 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP); 3036 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP); 3037 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP); 3038 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP); 3039 3040 static ssize_t target_tg_pt_gp_alua_write_metadata_show( 3041 struct config_item *item, char *page) 3042 { 3043 return sprintf(page, "%d\n", 3044 to_tg_pt_gp(item)->tg_pt_gp_write_metadata); 3045 } 3046 3047 static ssize_t target_tg_pt_gp_alua_write_metadata_store( 3048 struct config_item *item, const char *page, size_t count) 3049 { 3050 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3051 unsigned long tmp; 3052 int ret; 3053 3054 ret = kstrtoul(page, 0, &tmp); 3055 if (ret < 0) { 3056 pr_err("Unable to extract alua_write_metadata\n"); 3057 return ret; 3058 } 3059 3060 if ((tmp != 0) && (tmp != 1)) { 3061 pr_err("Illegal value for alua_write_metadata:" 3062 " %lu\n", tmp); 3063 return -EINVAL; 3064 } 3065 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 3066 3067 return count; 3068 } 3069 3070 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item, 3071 char *page) 3072 { 3073 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page); 3074 } 3075 3076 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item, 3077 const char *page, size_t count) 3078 { 3079 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page, 3080 count); 3081 } 3082 3083 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item, 3084 char *page) 3085 { 3086 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page); 3087 } 3088 3089 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item, 3090 const char *page, size_t count) 3091 { 3092 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page, 3093 count); 3094 } 3095 3096 static ssize_t target_tg_pt_gp_implicit_trans_secs_show( 3097 struct config_item *item, char *page) 3098 { 3099 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page); 3100 } 3101 3102 static ssize_t target_tg_pt_gp_implicit_trans_secs_store( 3103 struct config_item *item, const char *page, size_t count) 3104 { 3105 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page, 3106 count); 3107 } 3108 3109 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item, 3110 char *page) 3111 { 3112 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page); 3113 } 3114 3115 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item, 3116 const char *page, size_t count) 3117 { 3118 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count); 3119 } 3120 3121 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item, 3122 char *page) 3123 { 3124 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3125 3126 if (!tg_pt_gp->tg_pt_gp_valid_id) 3127 return 0; 3128 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 3129 } 3130 3131 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item, 3132 const char *page, size_t count) 3133 { 3134 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3135 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 3136 unsigned long tg_pt_gp_id; 3137 int ret; 3138 3139 ret = kstrtoul(page, 0, &tg_pt_gp_id); 3140 if (ret < 0) { 3141 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n", 3142 page); 3143 return ret; 3144 } 3145 if (tg_pt_gp_id > 0x0000ffff) { 3146 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n", 3147 tg_pt_gp_id); 3148 return -EINVAL; 3149 } 3150 3151 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 3152 if (ret < 0) 3153 return -EINVAL; 3154 3155 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 3156 "core/alua/tg_pt_gps/%s to ID: %hu\n", 3157 config_item_name(&alua_tg_pt_gp_cg->cg_item), 3158 tg_pt_gp->tg_pt_gp_id); 3159 3160 return count; 3161 } 3162 3163 static ssize_t target_tg_pt_gp_members_show(struct config_item *item, 3164 char *page) 3165 { 3166 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3167 struct se_lun *lun; 3168 ssize_t len = 0, cur_len; 3169 unsigned char buf[TG_PT_GROUP_NAME_BUF] = { }; 3170 3171 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 3172 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, 3173 lun_tg_pt_gp_link) { 3174 struct se_portal_group *tpg = lun->lun_tpg; 3175 3176 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 3177 "/%s\n", tpg->se_tpg_tfo->fabric_name, 3178 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 3179 tpg->se_tpg_tfo->tpg_get_tag(tpg), 3180 config_item_name(&lun->lun_group.cg_item)); 3181 cur_len++; /* Extra byte for NULL terminator */ 3182 3183 if ((cur_len + len) > PAGE_SIZE) { 3184 pr_warn("Ran out of lu_gp_show_attr" 3185 "_members buffer\n"); 3186 break; 3187 } 3188 memcpy(page+len, buf, cur_len); 3189 len += cur_len; 3190 } 3191 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 3192 3193 return len; 3194 } 3195 3196 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state); 3197 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status); 3198 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type); 3199 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning); 3200 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline); 3201 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent); 3202 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable); 3203 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby); 3204 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized); 3205 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized); 3206 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata); 3207 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs); 3208 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs); 3209 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs); 3210 CONFIGFS_ATTR(target_tg_pt_gp_, preferred); 3211 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id); 3212 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members); 3213 3214 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 3215 &target_tg_pt_gp_attr_alua_access_state, 3216 &target_tg_pt_gp_attr_alua_access_status, 3217 &target_tg_pt_gp_attr_alua_access_type, 3218 &target_tg_pt_gp_attr_alua_support_transitioning, 3219 &target_tg_pt_gp_attr_alua_support_offline, 3220 &target_tg_pt_gp_attr_alua_support_lba_dependent, 3221 &target_tg_pt_gp_attr_alua_support_unavailable, 3222 &target_tg_pt_gp_attr_alua_support_standby, 3223 &target_tg_pt_gp_attr_alua_support_active_nonoptimized, 3224 &target_tg_pt_gp_attr_alua_support_active_optimized, 3225 &target_tg_pt_gp_attr_alua_write_metadata, 3226 &target_tg_pt_gp_attr_nonop_delay_msecs, 3227 &target_tg_pt_gp_attr_trans_delay_msecs, 3228 &target_tg_pt_gp_attr_implicit_trans_secs, 3229 &target_tg_pt_gp_attr_preferred, 3230 &target_tg_pt_gp_attr_tg_pt_gp_id, 3231 &target_tg_pt_gp_attr_members, 3232 NULL, 3233 }; 3234 3235 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 3236 { 3237 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3238 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3239 3240 core_alua_free_tg_pt_gp(tg_pt_gp); 3241 } 3242 3243 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 3244 .release = target_core_alua_tg_pt_gp_release, 3245 }; 3246 3247 static const struct config_item_type target_core_alua_tg_pt_gp_cit = { 3248 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 3249 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 3250 .ct_owner = THIS_MODULE, 3251 }; 3252 3253 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 3254 3255 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3256 3257 static struct config_group *target_core_alua_create_tg_pt_gp( 3258 struct config_group *group, 3259 const char *name) 3260 { 3261 struct t10_alua *alua = container_of(group, struct t10_alua, 3262 alua_tg_pt_gps_group); 3263 struct t10_alua_tg_pt_gp *tg_pt_gp; 3264 struct config_group *alua_tg_pt_gp_cg = NULL; 3265 struct config_item *alua_tg_pt_gp_ci = NULL; 3266 3267 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0); 3268 if (!tg_pt_gp) 3269 return NULL; 3270 3271 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 3272 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 3273 3274 config_group_init_type_name(alua_tg_pt_gp_cg, name, 3275 &target_core_alua_tg_pt_gp_cit); 3276 3277 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 3278 " Group: alua/tg_pt_gps/%s\n", 3279 config_item_name(alua_tg_pt_gp_ci)); 3280 3281 return alua_tg_pt_gp_cg; 3282 } 3283 3284 static void target_core_alua_drop_tg_pt_gp( 3285 struct config_group *group, 3286 struct config_item *item) 3287 { 3288 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3289 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3290 3291 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 3292 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 3293 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 3294 /* 3295 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 3296 * -> target_core_alua_tg_pt_gp_release(). 3297 */ 3298 config_item_put(item); 3299 } 3300 3301 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 3302 .make_group = &target_core_alua_create_tg_pt_gp, 3303 .drop_item = &target_core_alua_drop_tg_pt_gp, 3304 }; 3305 3306 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL); 3307 3308 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3309 3310 /* Start functions for struct config_item_type target_core_alua_cit */ 3311 3312 /* 3313 * target_core_alua_cit is a ConfigFS group that lives under 3314 * /sys/kernel/config/target/core/alua. There are default groups 3315 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 3316 * target_core_alua_cit in target_core_init_configfs() below. 3317 */ 3318 static const struct config_item_type target_core_alua_cit = { 3319 .ct_item_ops = NULL, 3320 .ct_attrs = NULL, 3321 .ct_owner = THIS_MODULE, 3322 }; 3323 3324 /* End functions for struct config_item_type target_core_alua_cit */ 3325 3326 /* Start functions for struct config_item_type tb_dev_stat_cit */ 3327 3328 static struct config_group *target_core_stat_mkdir( 3329 struct config_group *group, 3330 const char *name) 3331 { 3332 return ERR_PTR(-ENOSYS); 3333 } 3334 3335 static void target_core_stat_rmdir( 3336 struct config_group *group, 3337 struct config_item *item) 3338 { 3339 return; 3340 } 3341 3342 static struct configfs_group_operations target_core_stat_group_ops = { 3343 .make_group = &target_core_stat_mkdir, 3344 .drop_item = &target_core_stat_rmdir, 3345 }; 3346 3347 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL); 3348 3349 /* End functions for struct config_item_type tb_dev_stat_cit */ 3350 3351 /* Start functions for struct config_item_type target_core_hba_cit */ 3352 3353 static struct config_group *target_core_make_subdev( 3354 struct config_group *group, 3355 const char *name) 3356 { 3357 struct t10_alua_tg_pt_gp *tg_pt_gp; 3358 struct config_item *hba_ci = &group->cg_item; 3359 struct se_hba *hba = item_to_hba(hba_ci); 3360 struct target_backend *tb = hba->backend; 3361 struct se_device *dev; 3362 int errno = -ENOMEM, ret; 3363 3364 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 3365 if (ret) 3366 return ERR_PTR(ret); 3367 3368 dev = target_alloc_device(hba, name); 3369 if (!dev) 3370 goto out_unlock; 3371 3372 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit); 3373 3374 config_group_init_type_name(&dev->dev_action_group, "action", 3375 &tb->tb_dev_action_cit); 3376 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group); 3377 3378 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib", 3379 &tb->tb_dev_attrib_cit); 3380 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group); 3381 3382 config_group_init_type_name(&dev->dev_pr_group, "pr", 3383 &tb->tb_dev_pr_cit); 3384 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group); 3385 3386 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn", 3387 &tb->tb_dev_wwn_cit); 3388 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group, 3389 &dev->dev_group); 3390 3391 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group, 3392 "alua", &tb->tb_dev_alua_tg_pt_gps_cit); 3393 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group, 3394 &dev->dev_group); 3395 3396 config_group_init_type_name(&dev->dev_stat_grps.stat_group, 3397 "statistics", &tb->tb_dev_stat_cit); 3398 configfs_add_default_group(&dev->dev_stat_grps.stat_group, 3399 &dev->dev_group); 3400 3401 /* 3402 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 3403 */ 3404 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1); 3405 if (!tg_pt_gp) 3406 goto out_free_device; 3407 dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 3408 3409 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 3410 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 3411 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group, 3412 &dev->t10_alua.alua_tg_pt_gps_group); 3413 3414 /* 3415 * Add core/$HBA/$DEV/statistics/ default groups 3416 */ 3417 target_stat_setup_dev_default_groups(dev); 3418 3419 mutex_lock(&target_devices_lock); 3420 target_devices++; 3421 mutex_unlock(&target_devices_lock); 3422 3423 mutex_unlock(&hba->hba_access_mutex); 3424 return &dev->dev_group; 3425 3426 out_free_device: 3427 target_free_device(dev); 3428 out_unlock: 3429 mutex_unlock(&hba->hba_access_mutex); 3430 return ERR_PTR(errno); 3431 } 3432 3433 static void target_core_drop_subdev( 3434 struct config_group *group, 3435 struct config_item *item) 3436 { 3437 struct config_group *dev_cg = to_config_group(item); 3438 struct se_device *dev = 3439 container_of(dev_cg, struct se_device, dev_group); 3440 struct se_hba *hba; 3441 3442 hba = item_to_hba(&dev->se_hba->hba_group.cg_item); 3443 3444 mutex_lock(&hba->hba_access_mutex); 3445 3446 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group); 3447 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group); 3448 3449 /* 3450 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 3451 * directly from target_core_alua_tg_pt_gp_release(). 3452 */ 3453 dev->t10_alua.default_tg_pt_gp = NULL; 3454 3455 configfs_remove_default_groups(dev_cg); 3456 3457 /* 3458 * se_dev is released from target_core_dev_item_ops->release() 3459 */ 3460 config_item_put(item); 3461 3462 mutex_lock(&target_devices_lock); 3463 target_devices--; 3464 mutex_unlock(&target_devices_lock); 3465 3466 mutex_unlock(&hba->hba_access_mutex); 3467 } 3468 3469 static struct configfs_group_operations target_core_hba_group_ops = { 3470 .make_group = target_core_make_subdev, 3471 .drop_item = target_core_drop_subdev, 3472 }; 3473 3474 3475 static inline struct se_hba *to_hba(struct config_item *item) 3476 { 3477 return container_of(to_config_group(item), struct se_hba, hba_group); 3478 } 3479 3480 static ssize_t target_hba_info_show(struct config_item *item, char *page) 3481 { 3482 struct se_hba *hba = to_hba(item); 3483 3484 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 3485 hba->hba_id, hba->backend->ops->name, 3486 TARGET_CORE_VERSION); 3487 } 3488 3489 static ssize_t target_hba_mode_show(struct config_item *item, char *page) 3490 { 3491 struct se_hba *hba = to_hba(item); 3492 int hba_mode = 0; 3493 3494 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 3495 hba_mode = 1; 3496 3497 return sprintf(page, "%d\n", hba_mode); 3498 } 3499 3500 static ssize_t target_hba_mode_store(struct config_item *item, 3501 const char *page, size_t count) 3502 { 3503 struct se_hba *hba = to_hba(item); 3504 unsigned long mode_flag; 3505 int ret; 3506 3507 if (hba->backend->ops->pmode_enable_hba == NULL) 3508 return -EINVAL; 3509 3510 ret = kstrtoul(page, 0, &mode_flag); 3511 if (ret < 0) { 3512 pr_err("Unable to extract hba mode flag: %d\n", ret); 3513 return ret; 3514 } 3515 3516 if (hba->dev_count) { 3517 pr_err("Unable to set hba_mode with active devices\n"); 3518 return -EINVAL; 3519 } 3520 3521 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag); 3522 if (ret < 0) 3523 return -EINVAL; 3524 if (ret > 0) 3525 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 3526 else if (ret == 0) 3527 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 3528 3529 return count; 3530 } 3531 3532 CONFIGFS_ATTR_RO(target_, hba_info); 3533 CONFIGFS_ATTR(target_, hba_mode); 3534 3535 static void target_core_hba_release(struct config_item *item) 3536 { 3537 struct se_hba *hba = container_of(to_config_group(item), 3538 struct se_hba, hba_group); 3539 core_delete_hba(hba); 3540 } 3541 3542 static struct configfs_attribute *target_core_hba_attrs[] = { 3543 &target_attr_hba_info, 3544 &target_attr_hba_mode, 3545 NULL, 3546 }; 3547 3548 static struct configfs_item_operations target_core_hba_item_ops = { 3549 .release = target_core_hba_release, 3550 }; 3551 3552 static const struct config_item_type target_core_hba_cit = { 3553 .ct_item_ops = &target_core_hba_item_ops, 3554 .ct_group_ops = &target_core_hba_group_ops, 3555 .ct_attrs = target_core_hba_attrs, 3556 .ct_owner = THIS_MODULE, 3557 }; 3558 3559 static struct config_group *target_core_call_addhbatotarget( 3560 struct config_group *group, 3561 const char *name) 3562 { 3563 char *se_plugin_str, *str, *str2; 3564 struct se_hba *hba; 3565 char buf[TARGET_CORE_NAME_MAX_LEN] = { }; 3566 unsigned long plugin_dep_id = 0; 3567 int ret; 3568 3569 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 3570 pr_err("Passed *name strlen(): %d exceeds" 3571 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 3572 TARGET_CORE_NAME_MAX_LEN); 3573 return ERR_PTR(-ENAMETOOLONG); 3574 } 3575 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 3576 3577 str = strstr(buf, "_"); 3578 if (!str) { 3579 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 3580 return ERR_PTR(-EINVAL); 3581 } 3582 se_plugin_str = buf; 3583 /* 3584 * Special case for subsystem plugins that have "_" in their names. 3585 * Namely rd_direct and rd_mcp.. 3586 */ 3587 str2 = strstr(str+1, "_"); 3588 if (str2) { 3589 *str2 = '\0'; /* Terminate for *se_plugin_str */ 3590 str2++; /* Skip to start of plugin dependent ID */ 3591 str = str2; 3592 } else { 3593 *str = '\0'; /* Terminate for *se_plugin_str */ 3594 str++; /* Skip to start of plugin dependent ID */ 3595 } 3596 3597 ret = kstrtoul(str, 0, &plugin_dep_id); 3598 if (ret < 0) { 3599 pr_err("kstrtoul() returned %d for" 3600 " plugin_dep_id\n", ret); 3601 return ERR_PTR(ret); 3602 } 3603 /* 3604 * Load up TCM subsystem plugins if they have not already been loaded. 3605 */ 3606 transport_subsystem_check_init(); 3607 3608 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 3609 if (IS_ERR(hba)) 3610 return ERR_CAST(hba); 3611 3612 config_group_init_type_name(&hba->hba_group, name, 3613 &target_core_hba_cit); 3614 3615 return &hba->hba_group; 3616 } 3617 3618 static void target_core_call_delhbafromtarget( 3619 struct config_group *group, 3620 struct config_item *item) 3621 { 3622 /* 3623 * core_delete_hba() is called from target_core_hba_item_ops->release() 3624 * -> target_core_hba_release() 3625 */ 3626 config_item_put(item); 3627 } 3628 3629 static struct configfs_group_operations target_core_group_ops = { 3630 .make_group = target_core_call_addhbatotarget, 3631 .drop_item = target_core_call_delhbafromtarget, 3632 }; 3633 3634 static const struct config_item_type target_core_cit = { 3635 .ct_item_ops = NULL, 3636 .ct_group_ops = &target_core_group_ops, 3637 .ct_attrs = NULL, 3638 .ct_owner = THIS_MODULE, 3639 }; 3640 3641 /* Stop functions for struct config_item_type target_core_hba_cit */ 3642 3643 void target_setup_backend_cits(struct target_backend *tb) 3644 { 3645 target_core_setup_dev_cit(tb); 3646 target_core_setup_dev_action_cit(tb); 3647 target_core_setup_dev_attrib_cit(tb); 3648 target_core_setup_dev_pr_cit(tb); 3649 target_core_setup_dev_wwn_cit(tb); 3650 target_core_setup_dev_alua_tg_pt_gps_cit(tb); 3651 target_core_setup_dev_stat_cit(tb); 3652 } 3653 3654 static void target_init_dbroot(void) 3655 { 3656 struct file *fp; 3657 3658 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED); 3659 fp = filp_open(db_root_stage, O_RDONLY, 0); 3660 if (IS_ERR(fp)) { 3661 pr_err("db_root: cannot open: %s\n", db_root_stage); 3662 return; 3663 } 3664 if (!S_ISDIR(file_inode(fp)->i_mode)) { 3665 filp_close(fp, NULL); 3666 pr_err("db_root: not a valid directory: %s\n", db_root_stage); 3667 return; 3668 } 3669 filp_close(fp, NULL); 3670 3671 strscpy(db_root, db_root_stage); 3672 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); 3673 } 3674 3675 static int __init target_core_init_configfs(void) 3676 { 3677 struct configfs_subsystem *subsys = &target_core_fabrics; 3678 struct t10_alua_lu_gp *lu_gp; 3679 int ret; 3680 3681 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 3682 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3683 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3684 3685 config_group_init(&subsys->su_group); 3686 mutex_init(&subsys->su_mutex); 3687 3688 ret = init_se_kmem_caches(); 3689 if (ret < 0) 3690 return ret; 3691 /* 3692 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3693 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3694 */ 3695 config_group_init_type_name(&target_core_hbagroup, "core", 3696 &target_core_cit); 3697 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group); 3698 3699 /* 3700 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3701 */ 3702 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit); 3703 configfs_add_default_group(&alua_group, &target_core_hbagroup); 3704 3705 /* 3706 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3707 * groups under /sys/kernel/config/target/core/alua/ 3708 */ 3709 config_group_init_type_name(&alua_lu_gps_group, "lu_gps", 3710 &target_core_alua_lu_gps_cit); 3711 configfs_add_default_group(&alua_lu_gps_group, &alua_group); 3712 3713 /* 3714 * Add core/alua/lu_gps/default_lu_gp 3715 */ 3716 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3717 if (IS_ERR(lu_gp)) { 3718 ret = -ENOMEM; 3719 goto out_global; 3720 } 3721 3722 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3723 &target_core_alua_lu_gp_cit); 3724 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group); 3725 3726 default_lu_gp = lu_gp; 3727 3728 /* 3729 * Register the target_core_mod subsystem with configfs. 3730 */ 3731 ret = configfs_register_subsystem(subsys); 3732 if (ret < 0) { 3733 pr_err("Error %d while registering subsystem %s\n", 3734 ret, subsys->su_group.cg_item.ci_namebuf); 3735 goto out_global; 3736 } 3737 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 3738 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s" 3739 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3740 /* 3741 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3742 */ 3743 ret = rd_module_init(); 3744 if (ret < 0) 3745 goto out; 3746 3747 ret = core_dev_setup_virtual_lun0(); 3748 if (ret < 0) 3749 goto out; 3750 3751 ret = target_xcopy_setup_pt(); 3752 if (ret < 0) 3753 goto out; 3754 3755 scoped_with_kernel_creds() 3756 target_init_dbroot(); 3757 3758 return 0; 3759 3760 out: 3761 target_xcopy_release_pt(); 3762 configfs_unregister_subsystem(subsys); 3763 core_dev_release_virtual_lun0(); 3764 rd_module_exit(); 3765 out_global: 3766 if (default_lu_gp) { 3767 core_alua_free_lu_gp(default_lu_gp); 3768 default_lu_gp = NULL; 3769 } 3770 release_se_kmem_caches(); 3771 return ret; 3772 } 3773 3774 static void __exit target_core_exit_configfs(void) 3775 { 3776 configfs_remove_default_groups(&alua_lu_gps_group); 3777 configfs_remove_default_groups(&alua_group); 3778 configfs_remove_default_groups(&target_core_hbagroup); 3779 3780 /* 3781 * We expect subsys->su_group.default_groups to be released 3782 * by configfs subsystem provider logic.. 3783 */ 3784 configfs_unregister_subsystem(&target_core_fabrics); 3785 3786 core_alua_free_lu_gp(default_lu_gp); 3787 default_lu_gp = NULL; 3788 3789 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3790 " Infrastructure\n"); 3791 3792 core_dev_release_virtual_lun0(); 3793 rd_module_exit(); 3794 target_xcopy_release_pt(); 3795 release_se_kmem_caches(); 3796 } 3797 3798 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3799 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3800 MODULE_LICENSE("GPL"); 3801 3802 module_init(target_core_init_configfs); 3803 module_exit(target_core_exit_configfs); 3804