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 ssize_t r = -EINVAL; 112 struct path path = {}; 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 r = kern_path(db_root_stage, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, &path); 135 if (r) { 136 pr_err("db_root: cannot open: %s\n", db_root_stage); 137 if (r == -ENOTDIR) 138 pr_err("db_root: not a directory: %s\n", db_root_stage); 139 goto unlock; 140 } 141 path_put(&path); 142 143 strscpy(db_root, db_root_stage); 144 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); 145 146 r = read_bytes; 147 148 unlock: 149 mutex_unlock(&target_devices_lock); 150 return r; 151 } 152 153 CONFIGFS_ATTR(target_core_item_, dbroot); 154 155 static struct target_fabric_configfs *target_core_get_fabric( 156 const char *name) 157 { 158 struct target_fabric_configfs *tf; 159 160 if (!name) 161 return NULL; 162 163 mutex_lock(&g_tf_lock); 164 list_for_each_entry(tf, &g_tf_list, tf_list) { 165 const char *cmp_name = tf->tf_ops->fabric_alias; 166 if (!cmp_name) 167 cmp_name = tf->tf_ops->fabric_name; 168 if (!strcmp(cmp_name, name)) { 169 atomic_inc(&tf->tf_access_cnt); 170 mutex_unlock(&g_tf_lock); 171 return tf; 172 } 173 } 174 mutex_unlock(&g_tf_lock); 175 176 return NULL; 177 } 178 179 /* 180 * Called from struct target_core_group_ops->make_group() 181 */ 182 static struct config_group *target_core_register_fabric( 183 struct config_group *group, 184 const char *name) 185 { 186 struct target_fabric_configfs *tf; 187 int ret; 188 189 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:" 190 " %s\n", group, name); 191 192 tf = target_core_get_fabric(name); 193 if (!tf) { 194 pr_debug("target_core_register_fabric() trying autoload for %s\n", 195 name); 196 197 /* 198 * Below are some hardcoded request_module() calls to automatically 199 * local fabric modules when the following is called: 200 * 201 * mkdir -p /sys/kernel/config/target/$MODULE_NAME 202 * 203 * Note that this does not limit which TCM fabric module can be 204 * registered, but simply provids auto loading logic for modules with 205 * mkdir(2) system calls with known TCM fabric modules. 206 */ 207 208 if (!strncmp(name, "iscsi", 5)) { 209 /* 210 * Automatically load the LIO Target fabric module when the 211 * following is called: 212 * 213 * mkdir -p $CONFIGFS/target/iscsi 214 */ 215 ret = request_module("iscsi_target_mod"); 216 if (ret < 0) { 217 pr_debug("request_module() failed for" 218 " iscsi_target_mod.ko: %d\n", ret); 219 return ERR_PTR(-EINVAL); 220 } 221 } else if (!strncmp(name, "loopback", 8)) { 222 /* 223 * Automatically load the tcm_loop fabric module when the 224 * following is called: 225 * 226 * mkdir -p $CONFIGFS/target/loopback 227 */ 228 ret = request_module("tcm_loop"); 229 if (ret < 0) { 230 pr_debug("request_module() failed for" 231 " tcm_loop.ko: %d\n", ret); 232 return ERR_PTR(-EINVAL); 233 } 234 } 235 236 tf = target_core_get_fabric(name); 237 } 238 239 if (!tf) { 240 pr_debug("target_core_get_fabric() failed for %s\n", 241 name); 242 return ERR_PTR(-EINVAL); 243 } 244 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:" 245 " %s\n", tf->tf_ops->fabric_name); 246 /* 247 * On a successful target_core_get_fabric() look, the returned 248 * struct target_fabric_configfs *tf will contain a usage reference. 249 */ 250 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n", 251 &tf->tf_wwn_cit); 252 253 config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit); 254 255 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth", 256 &tf->tf_discovery_cit); 257 configfs_add_default_group(&tf->tf_disc_group, &tf->tf_group); 258 259 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric: %s\n", 260 config_item_name(&tf->tf_group.cg_item)); 261 return &tf->tf_group; 262 } 263 264 /* 265 * Called from struct target_core_group_ops->drop_item() 266 */ 267 static void target_core_deregister_fabric( 268 struct config_group *group, 269 struct config_item *item) 270 { 271 struct target_fabric_configfs *tf = container_of( 272 to_config_group(item), struct target_fabric_configfs, tf_group); 273 274 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in" 275 " tf list\n", config_item_name(item)); 276 277 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:" 278 " %s\n", tf->tf_ops->fabric_name); 279 atomic_dec(&tf->tf_access_cnt); 280 281 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci" 282 " %s\n", config_item_name(item)); 283 284 configfs_remove_default_groups(&tf->tf_group); 285 config_item_put(item); 286 } 287 288 static const struct configfs_group_operations target_core_fabric_group_ops = { 289 .make_group = &target_core_register_fabric, 290 .drop_item = &target_core_deregister_fabric, 291 }; 292 293 /* 294 * All item attributes appearing in /sys/kernel/target/ appear here. 295 */ 296 static struct configfs_attribute *target_core_fabric_item_attrs[] = { 297 &target_core_item_attr_version, 298 &target_core_item_attr_dbroot, 299 NULL, 300 }; 301 302 /* 303 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/ 304 */ 305 static const struct config_item_type target_core_fabrics_item = { 306 .ct_group_ops = &target_core_fabric_group_ops, 307 .ct_attrs = target_core_fabric_item_attrs, 308 .ct_owner = THIS_MODULE, 309 }; 310 311 static struct configfs_subsystem target_core_fabrics = { 312 .su_group = { 313 .cg_item = { 314 .ci_namebuf = "target", 315 .ci_type = &target_core_fabrics_item, 316 }, 317 }, 318 }; 319 320 int target_depend_item(struct config_item *item) 321 { 322 return configfs_depend_item(&target_core_fabrics, item); 323 } 324 EXPORT_SYMBOL(target_depend_item); 325 326 void target_undepend_item(struct config_item *item) 327 { 328 return configfs_undepend_item(item); 329 } 330 EXPORT_SYMBOL(target_undepend_item); 331 332 /*############################################################################## 333 // Start functions called by external Target Fabrics Modules 334 //############################################################################*/ 335 static int target_disable_feature(struct se_portal_group *se_tpg) 336 { 337 return 0; 338 } 339 340 static u32 target_default_get_inst_index(struct se_portal_group *se_tpg) 341 { 342 return 1; 343 } 344 345 static u32 target_default_sess_get_index(struct se_session *se_sess) 346 { 347 return 0; 348 } 349 350 static void target_set_default_node_attributes(struct se_node_acl *se_acl) 351 { 352 } 353 354 static int target_default_get_cmd_state(struct se_cmd *se_cmd) 355 { 356 return 0; 357 } 358 359 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo) 360 { 361 if (tfo->fabric_alias) { 362 if (strlen(tfo->fabric_alias) >= TARGET_FABRIC_NAME_SIZE) { 363 pr_err("Passed alias: %s exceeds " 364 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_alias); 365 return -EINVAL; 366 } 367 } 368 if (!tfo->fabric_name) { 369 pr_err("Missing tfo->fabric_name\n"); 370 return -EINVAL; 371 } 372 if (strlen(tfo->fabric_name) >= TARGET_FABRIC_NAME_SIZE) { 373 pr_err("Passed name: %s exceeds " 374 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_name); 375 return -EINVAL; 376 } 377 if (!tfo->tpg_get_wwn) { 378 pr_err("Missing tfo->tpg_get_wwn()\n"); 379 return -EINVAL; 380 } 381 if (!tfo->tpg_get_tag) { 382 pr_err("Missing tfo->tpg_get_tag()\n"); 383 return -EINVAL; 384 } 385 if (!tfo->release_cmd) { 386 pr_err("Missing tfo->release_cmd()\n"); 387 return -EINVAL; 388 } 389 if (!tfo->write_pending) { 390 pr_err("Missing tfo->write_pending()\n"); 391 return -EINVAL; 392 } 393 if (!tfo->queue_data_in) { 394 pr_err("Missing tfo->queue_data_in()\n"); 395 return -EINVAL; 396 } 397 if (!tfo->queue_status) { 398 pr_err("Missing tfo->queue_status()\n"); 399 return -EINVAL; 400 } 401 if (!tfo->queue_tm_rsp) { 402 pr_err("Missing tfo->queue_tm_rsp()\n"); 403 return -EINVAL; 404 } 405 if (!tfo->aborted_task) { 406 pr_err("Missing tfo->aborted_task()\n"); 407 return -EINVAL; 408 } 409 if (!tfo->check_stop_free) { 410 pr_err("Missing tfo->check_stop_free()\n"); 411 return -EINVAL; 412 } 413 /* 414 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn() 415 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in 416 * target_core_fabric_configfs.c WWN+TPG group context code. 417 */ 418 if (!tfo->fabric_make_wwn) { 419 pr_err("Missing tfo->fabric_make_wwn()\n"); 420 return -EINVAL; 421 } 422 if (!tfo->fabric_drop_wwn) { 423 pr_err("Missing tfo->fabric_drop_wwn()\n"); 424 return -EINVAL; 425 } 426 if (!tfo->fabric_make_tpg) { 427 pr_err("Missing tfo->fabric_make_tpg()\n"); 428 return -EINVAL; 429 } 430 if (!tfo->fabric_drop_tpg) { 431 pr_err("Missing tfo->fabric_drop_tpg()\n"); 432 return -EINVAL; 433 } 434 435 return 0; 436 } 437 438 static void target_set_default_ops(struct target_core_fabric_ops *tfo) 439 { 440 if (!tfo->tpg_check_demo_mode) 441 tfo->tpg_check_demo_mode = target_disable_feature; 442 443 if (!tfo->tpg_check_demo_mode_cache) 444 tfo->tpg_check_demo_mode_cache = target_disable_feature; 445 446 if (!tfo->tpg_check_demo_mode_write_protect) 447 tfo->tpg_check_demo_mode_write_protect = target_disable_feature; 448 449 if (!tfo->tpg_check_prod_mode_write_protect) 450 tfo->tpg_check_prod_mode_write_protect = target_disable_feature; 451 452 if (!tfo->tpg_get_inst_index) 453 tfo->tpg_get_inst_index = target_default_get_inst_index; 454 455 if (!tfo->sess_get_index) 456 tfo->sess_get_index = target_default_sess_get_index; 457 458 if (!tfo->set_default_node_attributes) 459 tfo->set_default_node_attributes = target_set_default_node_attributes; 460 461 if (!tfo->get_cmd_state) 462 tfo->get_cmd_state = target_default_get_cmd_state; 463 } 464 465 int target_register_template(const struct target_core_fabric_ops *fo) 466 { 467 struct target_core_fabric_ops *tfo; 468 struct target_fabric_configfs *tf; 469 int ret; 470 471 ret = target_fabric_tf_ops_check(fo); 472 if (ret) 473 return ret; 474 475 tf = kzalloc_obj(struct target_fabric_configfs); 476 if (!tf) { 477 pr_err("%s: could not allocate memory!\n", __func__); 478 return -ENOMEM; 479 } 480 tfo = kzalloc_obj(struct target_core_fabric_ops); 481 if (!tfo) { 482 kfree(tf); 483 pr_err("%s: could not allocate memory!\n", __func__); 484 return -ENOMEM; 485 } 486 memcpy(tfo, fo, sizeof(*tfo)); 487 target_set_default_ops(tfo); 488 489 INIT_LIST_HEAD(&tf->tf_list); 490 atomic_set(&tf->tf_access_cnt, 0); 491 tf->tf_ops = tfo; 492 target_fabric_setup_cits(tf); 493 494 mutex_lock(&g_tf_lock); 495 list_add_tail(&tf->tf_list, &g_tf_list); 496 mutex_unlock(&g_tf_lock); 497 498 return 0; 499 } 500 EXPORT_SYMBOL(target_register_template); 501 502 void target_unregister_template(const struct target_core_fabric_ops *fo) 503 { 504 struct target_fabric_configfs *t; 505 506 mutex_lock(&g_tf_lock); 507 list_for_each_entry(t, &g_tf_list, tf_list) { 508 if (!strcmp(t->tf_ops->fabric_name, fo->fabric_name)) { 509 BUG_ON(atomic_read(&t->tf_access_cnt)); 510 list_del(&t->tf_list); 511 mutex_unlock(&g_tf_lock); 512 /* 513 * Wait for any outstanding fabric se_deve_entry->rcu_head 514 * callbacks to complete post kfree_rcu(), before allowing 515 * fabric driver unload of TFO->module to proceed. 516 */ 517 rcu_barrier(); 518 kfree(t->tf_tpg_base_cit.ct_attrs); 519 kfree(t->tf_ops); 520 kfree(t); 521 return; 522 } 523 } 524 mutex_unlock(&g_tf_lock); 525 } 526 EXPORT_SYMBOL(target_unregister_template); 527 528 /*############################################################################## 529 // Stop functions called by external Target Fabrics Modules 530 //############################################################################*/ 531 532 static inline struct se_dev_attrib *to_attrib(struct config_item *item) 533 { 534 return container_of(to_config_group(item), struct se_dev_attrib, 535 da_group); 536 } 537 538 /* Start functions for struct config_item_type tb_dev_attrib_cit */ 539 #define DEF_CONFIGFS_ATTRIB_SHOW(_name) \ 540 static ssize_t _name##_show(struct config_item *item, char *page) \ 541 { \ 542 return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \ 543 } 544 545 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias); 546 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo); 547 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write); 548 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read); 549 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache); 550 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl); 551 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas); 552 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu); 553 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws); 554 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw); 555 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc); 556 DEF_CONFIGFS_ATTRIB_SHOW(emulate_pr); 557 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type); 558 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type); 559 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify); 560 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids); 561 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot); 562 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord); 563 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl); 564 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size); 565 DEF_CONFIGFS_ATTRIB_SHOW(block_size); 566 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors); 567 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors); 568 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth); 569 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth); 570 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count); 571 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count); 572 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity); 573 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment); 574 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data); 575 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len); 576 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rsoc); 577 DEF_CONFIGFS_ATTRIB_SHOW(submit_type); 578 DEF_CONFIGFS_ATTRIB_SHOW(atomic_max_len); 579 DEF_CONFIGFS_ATTRIB_SHOW(atomic_alignment); 580 DEF_CONFIGFS_ATTRIB_SHOW(atomic_granularity); 581 DEF_CONFIGFS_ATTRIB_SHOW(atomic_max_with_boundary); 582 DEF_CONFIGFS_ATTRIB_SHOW(atomic_max_boundary); 583 584 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \ 585 static ssize_t _name##_store(struct config_item *item, const char *page,\ 586 size_t count) \ 587 { \ 588 struct se_dev_attrib *da = to_attrib(item); \ 589 u32 val; \ 590 int ret; \ 591 \ 592 ret = kstrtou32(page, 0, &val); \ 593 if (ret < 0) \ 594 return ret; \ 595 da->_name = val; \ 596 return count; \ 597 } 598 599 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count); 600 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count); 601 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity); 602 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment); 603 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len); 604 605 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \ 606 static ssize_t _name##_store(struct config_item *item, const char *page, \ 607 size_t count) \ 608 { \ 609 struct se_dev_attrib *da = to_attrib(item); \ 610 bool flag; \ 611 int ret; \ 612 \ 613 ret = kstrtobool(page, &flag); \ 614 if (ret < 0) \ 615 return ret; \ 616 da->_name = flag; \ 617 return count; \ 618 } 619 620 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write); 621 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw); 622 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc); 623 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr); 624 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids); 625 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot); 626 627 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \ 628 static ssize_t _name##_store(struct config_item *item, const char *page,\ 629 size_t count) \ 630 { \ 631 printk_once(KERN_WARNING \ 632 "ignoring deprecated %s attribute\n", \ 633 __stringify(_name)); \ 634 return count; \ 635 } 636 637 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo); 638 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read); 639 640 static void dev_set_t10_wwn_model_alias(struct se_device *dev) 641 { 642 const char *configname; 643 644 configname = config_item_name(&dev->dev_group.cg_item); 645 if (strlen(configname) >= INQUIRY_MODEL_LEN) { 646 pr_warn("dev[%p]: Backstore name '%s' is too long for " 647 "INQUIRY_MODEL, truncating to 15 characters\n", dev, 648 configname); 649 } 650 /* 651 * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1) 652 * here without potentially breaking existing setups, so continue to 653 * truncate one byte shorter than what can be carried in INQUIRY. 654 */ 655 strscpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN); 656 } 657 658 static ssize_t emulate_model_alias_store(struct config_item *item, 659 const char *page, size_t count) 660 { 661 struct se_dev_attrib *da = to_attrib(item); 662 struct se_device *dev = da->da_dev; 663 bool flag; 664 int ret; 665 666 if (dev->export_count) { 667 pr_err("dev[%p]: Unable to change model alias" 668 " while export_count is %d\n", 669 dev, dev->export_count); 670 return -EINVAL; 671 } 672 673 ret = kstrtobool(page, &flag); 674 if (ret < 0) 675 return ret; 676 677 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); 678 if (flag) 679 dev_set_t10_wwn_model_alias(dev); 680 else 681 strscpy(dev->t10_wwn.model, dev->transport->inquiry_prod); 682 da->emulate_model_alias = flag; 683 return count; 684 } 685 686 static ssize_t emulate_write_cache_store(struct config_item *item, 687 const char *page, size_t count) 688 { 689 struct se_dev_attrib *da = to_attrib(item); 690 bool flag; 691 int ret; 692 693 ret = kstrtobool(page, &flag); 694 if (ret < 0) 695 return ret; 696 697 if (flag && da->da_dev->transport->get_write_cache) { 698 pr_err("emulate_write_cache not supported for this device\n"); 699 return -EINVAL; 700 } 701 702 da->emulate_write_cache = flag; 703 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 704 da->da_dev, flag); 705 return count; 706 } 707 708 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item, 709 const char *page, size_t count) 710 { 711 struct se_dev_attrib *da = to_attrib(item); 712 u32 val; 713 int ret; 714 715 ret = kstrtou32(page, 0, &val); 716 if (ret < 0) 717 return ret; 718 719 if (val != TARGET_UA_INTLCK_CTRL_CLEAR 720 && val != TARGET_UA_INTLCK_CTRL_NO_CLEAR 721 && val != TARGET_UA_INTLCK_CTRL_ESTABLISH_UA) { 722 pr_err("Illegal value %d\n", val); 723 return -EINVAL; 724 } 725 726 if (da->da_dev->export_count) { 727 pr_err("dev[%p]: Unable to change SE Device" 728 " UA_INTRLCK_CTRL while export_count is %d\n", 729 da->da_dev, da->da_dev->export_count); 730 return -EINVAL; 731 } 732 da->emulate_ua_intlck_ctrl = val; 733 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 734 da->da_dev, val); 735 return count; 736 } 737 738 static ssize_t emulate_tas_store(struct config_item *item, 739 const char *page, size_t count) 740 { 741 struct se_dev_attrib *da = to_attrib(item); 742 bool flag; 743 int ret; 744 745 ret = kstrtobool(page, &flag); 746 if (ret < 0) 747 return ret; 748 749 if (da->da_dev->export_count) { 750 pr_err("dev[%p]: Unable to change SE Device TAS while" 751 " export_count is %d\n", 752 da->da_dev, da->da_dev->export_count); 753 return -EINVAL; 754 } 755 da->emulate_tas = flag; 756 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 757 da->da_dev, flag ? "Enabled" : "Disabled"); 758 759 return count; 760 } 761 762 static int target_try_configure_unmap(struct se_device *dev, 763 const char *config_opt) 764 { 765 if (!dev->transport->configure_unmap) { 766 pr_err("Generic Block Discard not supported\n"); 767 return -ENOSYS; 768 } 769 770 if (!target_dev_configured(dev)) { 771 pr_err("Generic Block Discard setup for %s requires device to be configured\n", 772 config_opt); 773 return -ENODEV; 774 } 775 776 if (!dev->transport->configure_unmap(dev)) { 777 pr_err("Generic Block Discard setup for %s failed\n", 778 config_opt); 779 return -ENOSYS; 780 } 781 782 return 0; 783 } 784 785 static ssize_t emulate_tpu_store(struct config_item *item, 786 const char *page, size_t count) 787 { 788 struct se_dev_attrib *da = to_attrib(item); 789 struct se_device *dev = da->da_dev; 790 bool flag; 791 int ret; 792 793 ret = kstrtobool(page, &flag); 794 if (ret < 0) 795 return ret; 796 797 /* 798 * We expect this value to be non-zero when generic Block Layer 799 * Discard supported is detected iblock_create_virtdevice(). 800 */ 801 if (flag && !da->max_unmap_block_desc_count) { 802 ret = target_try_configure_unmap(dev, "emulate_tpu"); 803 if (ret) 804 return ret; 805 } 806 807 da->emulate_tpu = flag; 808 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 809 da->da_dev, flag); 810 return count; 811 } 812 813 static ssize_t emulate_tpws_store(struct config_item *item, 814 const char *page, size_t count) 815 { 816 struct se_dev_attrib *da = to_attrib(item); 817 struct se_device *dev = da->da_dev; 818 bool flag; 819 int ret; 820 821 ret = kstrtobool(page, &flag); 822 if (ret < 0) 823 return ret; 824 825 /* 826 * We expect this value to be non-zero when generic Block Layer 827 * Discard supported is detected iblock_create_virtdevice(). 828 */ 829 if (flag && !da->max_unmap_block_desc_count) { 830 ret = target_try_configure_unmap(dev, "emulate_tpws"); 831 if (ret) 832 return ret; 833 } 834 835 da->emulate_tpws = flag; 836 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 837 da->da_dev, flag); 838 return count; 839 } 840 841 static ssize_t pi_prot_type_store(struct config_item *item, 842 const char *page, size_t count) 843 { 844 struct se_dev_attrib *da = to_attrib(item); 845 int old_prot = da->pi_prot_type, ret; 846 struct se_device *dev = da->da_dev; 847 u32 flag; 848 849 ret = kstrtou32(page, 0, &flag); 850 if (ret < 0) 851 return ret; 852 853 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) { 854 pr_err("Illegal value %d for pi_prot_type\n", flag); 855 return -EINVAL; 856 } 857 if (flag == 2) { 858 pr_err("DIF TYPE2 protection currently not supported\n"); 859 return -ENOSYS; 860 } 861 if (da->hw_pi_prot_type) { 862 pr_warn("DIF protection enabled on underlying hardware," 863 " ignoring\n"); 864 return count; 865 } 866 if (!dev->transport->init_prot || !dev->transport->free_prot) { 867 /* 0 is only allowed value for non-supporting backends */ 868 if (flag == 0) 869 return count; 870 871 pr_err("DIF protection not supported by backend: %s\n", 872 dev->transport->name); 873 return -ENOSYS; 874 } 875 if (!target_dev_configured(dev)) { 876 pr_err("DIF protection requires device to be configured\n"); 877 return -ENODEV; 878 } 879 if (dev->export_count) { 880 pr_err("dev[%p]: Unable to change SE Device PROT type while" 881 " export_count is %d\n", dev, dev->export_count); 882 return -EINVAL; 883 } 884 885 da->pi_prot_type = flag; 886 887 if (flag && !old_prot) { 888 ret = dev->transport->init_prot(dev); 889 if (ret) { 890 da->pi_prot_type = old_prot; 891 da->pi_prot_verify = (bool) da->pi_prot_type; 892 return ret; 893 } 894 895 } else if (!flag && old_prot) { 896 dev->transport->free_prot(dev); 897 } 898 899 da->pi_prot_verify = (bool) da->pi_prot_type; 900 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag); 901 return count; 902 } 903 904 /* always zero, but attr needs to remain RW to avoid userspace breakage */ 905 static ssize_t pi_prot_format_show(struct config_item *item, char *page) 906 { 907 return snprintf(page, PAGE_SIZE, "0\n"); 908 } 909 910 static ssize_t pi_prot_format_store(struct config_item *item, 911 const char *page, size_t count) 912 { 913 struct se_dev_attrib *da = to_attrib(item); 914 struct se_device *dev = da->da_dev; 915 bool flag; 916 int ret; 917 918 ret = kstrtobool(page, &flag); 919 if (ret < 0) 920 return ret; 921 922 if (!flag) 923 return count; 924 925 if (!dev->transport->format_prot) { 926 pr_err("DIF protection format not supported by backend %s\n", 927 dev->transport->name); 928 return -ENOSYS; 929 } 930 if (!target_dev_configured(dev)) { 931 pr_err("DIF protection format requires device to be configured\n"); 932 return -ENODEV; 933 } 934 if (dev->export_count) { 935 pr_err("dev[%p]: Unable to format SE Device PROT type while" 936 " export_count is %d\n", dev, dev->export_count); 937 return -EINVAL; 938 } 939 940 ret = dev->transport->format_prot(dev); 941 if (ret) 942 return ret; 943 944 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev); 945 return count; 946 } 947 948 static ssize_t pi_prot_verify_store(struct config_item *item, 949 const char *page, size_t count) 950 { 951 struct se_dev_attrib *da = to_attrib(item); 952 bool flag; 953 int ret; 954 955 ret = kstrtobool(page, &flag); 956 if (ret < 0) 957 return ret; 958 959 if (!flag) { 960 da->pi_prot_verify = flag; 961 return count; 962 } 963 if (da->hw_pi_prot_type) { 964 pr_warn("DIF protection enabled on underlying hardware," 965 " ignoring\n"); 966 return count; 967 } 968 if (!da->pi_prot_type) { 969 pr_warn("DIF protection not supported by backend, ignoring\n"); 970 return count; 971 } 972 da->pi_prot_verify = flag; 973 974 return count; 975 } 976 977 static ssize_t force_pr_aptpl_store(struct config_item *item, 978 const char *page, size_t count) 979 { 980 struct se_dev_attrib *da = to_attrib(item); 981 bool flag; 982 int ret; 983 984 ret = kstrtobool(page, &flag); 985 if (ret < 0) 986 return ret; 987 if (da->da_dev->export_count) { 988 pr_err("dev[%p]: Unable to set force_pr_aptpl while" 989 " export_count is %d\n", 990 da->da_dev, da->da_dev->export_count); 991 return -EINVAL; 992 } 993 994 da->force_pr_aptpl = flag; 995 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag); 996 return count; 997 } 998 999 static ssize_t emulate_rest_reord_store(struct config_item *item, 1000 const char *page, size_t count) 1001 { 1002 struct se_dev_attrib *da = to_attrib(item); 1003 bool flag; 1004 int ret; 1005 1006 ret = kstrtobool(page, &flag); 1007 if (ret < 0) 1008 return ret; 1009 1010 if (flag != 0) { 1011 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted" 1012 " reordering not implemented\n", da->da_dev); 1013 return -ENOSYS; 1014 } 1015 da->emulate_rest_reord = flag; 1016 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", 1017 da->da_dev, flag); 1018 return count; 1019 } 1020 1021 static ssize_t unmap_zeroes_data_store(struct config_item *item, 1022 const char *page, size_t count) 1023 { 1024 struct se_dev_attrib *da = to_attrib(item); 1025 struct se_device *dev = da->da_dev; 1026 bool flag; 1027 int ret; 1028 1029 ret = kstrtobool(page, &flag); 1030 if (ret < 0) 1031 return ret; 1032 1033 if (da->da_dev->export_count) { 1034 pr_err("dev[%p]: Unable to change SE Device" 1035 " unmap_zeroes_data while export_count is %d\n", 1036 da->da_dev, da->da_dev->export_count); 1037 return -EINVAL; 1038 } 1039 /* 1040 * We expect this value to be non-zero when generic Block Layer 1041 * Discard supported is detected iblock_configure_device(). 1042 */ 1043 if (flag && !da->max_unmap_block_desc_count) { 1044 ret = target_try_configure_unmap(dev, "unmap_zeroes_data"); 1045 if (ret) 1046 return ret; 1047 } 1048 da->unmap_zeroes_data = flag; 1049 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n", 1050 da->da_dev, flag); 1051 return count; 1052 } 1053 1054 /* 1055 * Note, this can only be called on unexported SE Device Object. 1056 */ 1057 static ssize_t queue_depth_store(struct config_item *item, 1058 const char *page, size_t count) 1059 { 1060 struct se_dev_attrib *da = to_attrib(item); 1061 struct se_device *dev = da->da_dev; 1062 u32 val; 1063 int ret; 1064 1065 ret = kstrtou32(page, 0, &val); 1066 if (ret < 0) 1067 return ret; 1068 1069 if (dev->export_count) { 1070 pr_err("dev[%p]: Unable to change SE Device TCQ while" 1071 " export_count is %d\n", 1072 dev, dev->export_count); 1073 return -EINVAL; 1074 } 1075 if (!val) { 1076 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev); 1077 return -EINVAL; 1078 } 1079 1080 if (val > dev->dev_attrib.queue_depth) { 1081 if (val > dev->dev_attrib.hw_queue_depth) { 1082 pr_err("dev[%p]: Passed queue_depth:" 1083 " %u exceeds TCM/SE_Device MAX" 1084 " TCQ: %u\n", dev, val, 1085 dev->dev_attrib.hw_queue_depth); 1086 return -EINVAL; 1087 } 1088 } 1089 da->queue_depth = dev->queue_depth = val; 1090 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val); 1091 return count; 1092 } 1093 1094 static ssize_t optimal_sectors_store(struct config_item *item, 1095 const char *page, size_t count) 1096 { 1097 struct se_dev_attrib *da = to_attrib(item); 1098 u32 val; 1099 int ret; 1100 1101 ret = kstrtou32(page, 0, &val); 1102 if (ret < 0) 1103 return ret; 1104 1105 if (da->da_dev->export_count) { 1106 pr_err("dev[%p]: Unable to change SE Device" 1107 " optimal_sectors while export_count is %d\n", 1108 da->da_dev, da->da_dev->export_count); 1109 return -EINVAL; 1110 } 1111 if (val > da->hw_max_sectors) { 1112 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1113 " greater than hw_max_sectors: %u\n", 1114 da->da_dev, val, da->hw_max_sectors); 1115 return -EINVAL; 1116 } 1117 1118 da->optimal_sectors = val; 1119 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1120 da->da_dev, val); 1121 return count; 1122 } 1123 1124 static ssize_t block_size_store(struct config_item *item, 1125 const char *page, size_t count) 1126 { 1127 struct se_dev_attrib *da = to_attrib(item); 1128 u32 val; 1129 int ret; 1130 1131 ret = kstrtou32(page, 0, &val); 1132 if (ret < 0) 1133 return ret; 1134 1135 if (da->da_dev->export_count) { 1136 pr_err("dev[%p]: Unable to change SE Device block_size" 1137 " while export_count is %d\n", 1138 da->da_dev, da->da_dev->export_count); 1139 return -EINVAL; 1140 } 1141 1142 if (val != 512 && val != 1024 && val != 2048 && val != 4096) { 1143 pr_err("dev[%p]: Illegal value for block_device: %u" 1144 " for SE device, must be 512, 1024, 2048 or 4096\n", 1145 da->da_dev, val); 1146 return -EINVAL; 1147 } 1148 1149 da->block_size = val; 1150 1151 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1152 da->da_dev, val); 1153 return count; 1154 } 1155 1156 static ssize_t alua_support_show(struct config_item *item, char *page) 1157 { 1158 struct se_dev_attrib *da = to_attrib(item); 1159 u8 flags = da->da_dev->transport_flags; 1160 1161 return snprintf(page, PAGE_SIZE, "%d\n", 1162 flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1); 1163 } 1164 1165 static ssize_t alua_support_store(struct config_item *item, 1166 const char *page, size_t count) 1167 { 1168 struct se_dev_attrib *da = to_attrib(item); 1169 struct se_device *dev = da->da_dev; 1170 bool flag, oldflag; 1171 int ret; 1172 1173 ret = kstrtobool(page, &flag); 1174 if (ret < 0) 1175 return ret; 1176 1177 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA); 1178 if (flag == oldflag) 1179 return count; 1180 1181 if (!(dev->transport->transport_flags_changeable & 1182 TRANSPORT_FLAG_PASSTHROUGH_ALUA)) { 1183 pr_err("dev[%p]: Unable to change SE Device alua_support:" 1184 " alua_support has fixed value\n", dev); 1185 return -ENOSYS; 1186 } 1187 1188 if (flag) 1189 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_ALUA; 1190 else 1191 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_ALUA; 1192 return count; 1193 } 1194 1195 static ssize_t pgr_support_show(struct config_item *item, char *page) 1196 { 1197 struct se_dev_attrib *da = to_attrib(item); 1198 u8 flags = da->da_dev->transport_flags; 1199 1200 return snprintf(page, PAGE_SIZE, "%d\n", 1201 flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1); 1202 } 1203 1204 static ssize_t pgr_support_store(struct config_item *item, 1205 const char *page, size_t count) 1206 { 1207 struct se_dev_attrib *da = to_attrib(item); 1208 struct se_device *dev = da->da_dev; 1209 bool flag, oldflag; 1210 int ret; 1211 1212 ret = kstrtobool(page, &flag); 1213 if (ret < 0) 1214 return ret; 1215 1216 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR); 1217 if (flag == oldflag) 1218 return count; 1219 1220 if (!(dev->transport->transport_flags_changeable & 1221 TRANSPORT_FLAG_PASSTHROUGH_PGR)) { 1222 pr_err("dev[%p]: Unable to change SE Device pgr_support:" 1223 " pgr_support has fixed value\n", dev); 1224 return -ENOSYS; 1225 } 1226 1227 if (flag) 1228 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_PGR; 1229 else 1230 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_PGR; 1231 return count; 1232 } 1233 1234 static ssize_t emulate_rsoc_store(struct config_item *item, 1235 const char *page, size_t count) 1236 { 1237 struct se_dev_attrib *da = to_attrib(item); 1238 bool flag; 1239 int ret; 1240 1241 ret = kstrtobool(page, &flag); 1242 if (ret < 0) 1243 return ret; 1244 1245 da->emulate_rsoc = flag; 1246 pr_debug("dev[%p]: SE Device REPORT_SUPPORTED_OPERATION_CODES_EMULATION flag: %d\n", 1247 da->da_dev, flag); 1248 return count; 1249 } 1250 1251 static ssize_t submit_type_store(struct config_item *item, const char *page, 1252 size_t count) 1253 { 1254 struct se_dev_attrib *da = to_attrib(item); 1255 int ret; 1256 u8 val; 1257 1258 ret = kstrtou8(page, 0, &val); 1259 if (ret < 0) 1260 return ret; 1261 1262 if (val > TARGET_QUEUE_SUBMIT) 1263 return -EINVAL; 1264 1265 da->submit_type = val; 1266 return count; 1267 } 1268 1269 CONFIGFS_ATTR(, emulate_model_alias); 1270 CONFIGFS_ATTR(, emulate_dpo); 1271 CONFIGFS_ATTR(, emulate_fua_write); 1272 CONFIGFS_ATTR(, emulate_fua_read); 1273 CONFIGFS_ATTR(, emulate_write_cache); 1274 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl); 1275 CONFIGFS_ATTR(, emulate_tas); 1276 CONFIGFS_ATTR(, emulate_tpu); 1277 CONFIGFS_ATTR(, emulate_tpws); 1278 CONFIGFS_ATTR(, emulate_caw); 1279 CONFIGFS_ATTR(, emulate_3pc); 1280 CONFIGFS_ATTR(, emulate_pr); 1281 CONFIGFS_ATTR(, emulate_rsoc); 1282 CONFIGFS_ATTR(, pi_prot_type); 1283 CONFIGFS_ATTR_RO(, hw_pi_prot_type); 1284 CONFIGFS_ATTR(, pi_prot_format); 1285 CONFIGFS_ATTR(, pi_prot_verify); 1286 CONFIGFS_ATTR(, enforce_pr_isids); 1287 CONFIGFS_ATTR(, is_nonrot); 1288 CONFIGFS_ATTR(, emulate_rest_reord); 1289 CONFIGFS_ATTR(, force_pr_aptpl); 1290 CONFIGFS_ATTR_RO(, hw_block_size); 1291 CONFIGFS_ATTR(, block_size); 1292 CONFIGFS_ATTR_RO(, hw_max_sectors); 1293 CONFIGFS_ATTR(, optimal_sectors); 1294 CONFIGFS_ATTR_RO(, hw_queue_depth); 1295 CONFIGFS_ATTR(, queue_depth); 1296 CONFIGFS_ATTR(, max_unmap_lba_count); 1297 CONFIGFS_ATTR(, max_unmap_block_desc_count); 1298 CONFIGFS_ATTR(, unmap_granularity); 1299 CONFIGFS_ATTR(, unmap_granularity_alignment); 1300 CONFIGFS_ATTR(, unmap_zeroes_data); 1301 CONFIGFS_ATTR(, max_write_same_len); 1302 CONFIGFS_ATTR(, alua_support); 1303 CONFIGFS_ATTR(, pgr_support); 1304 CONFIGFS_ATTR(, submit_type); 1305 CONFIGFS_ATTR_RO(, atomic_max_len); 1306 CONFIGFS_ATTR_RO(, atomic_alignment); 1307 CONFIGFS_ATTR_RO(, atomic_granularity); 1308 CONFIGFS_ATTR_RO(, atomic_max_with_boundary); 1309 CONFIGFS_ATTR_RO(, atomic_max_boundary); 1310 1311 /* 1312 * dev_attrib attributes for devices using the target core SBC/SPC 1313 * interpreter. Any backend using spc_parse_cdb should be using 1314 * these. 1315 */ 1316 struct configfs_attribute *sbc_attrib_attrs[] = { 1317 &attr_emulate_model_alias, 1318 &attr_emulate_dpo, 1319 &attr_emulate_fua_write, 1320 &attr_emulate_fua_read, 1321 &attr_emulate_write_cache, 1322 &attr_emulate_ua_intlck_ctrl, 1323 &attr_emulate_tas, 1324 &attr_emulate_tpu, 1325 &attr_emulate_tpws, 1326 &attr_emulate_caw, 1327 &attr_emulate_3pc, 1328 &attr_emulate_pr, 1329 &attr_pi_prot_type, 1330 &attr_hw_pi_prot_type, 1331 &attr_pi_prot_format, 1332 &attr_pi_prot_verify, 1333 &attr_enforce_pr_isids, 1334 &attr_is_nonrot, 1335 &attr_emulate_rest_reord, 1336 &attr_force_pr_aptpl, 1337 &attr_hw_block_size, 1338 &attr_block_size, 1339 &attr_hw_max_sectors, 1340 &attr_optimal_sectors, 1341 &attr_hw_queue_depth, 1342 &attr_queue_depth, 1343 &attr_max_unmap_lba_count, 1344 &attr_max_unmap_block_desc_count, 1345 &attr_unmap_granularity, 1346 &attr_unmap_granularity_alignment, 1347 &attr_unmap_zeroes_data, 1348 &attr_max_write_same_len, 1349 &attr_alua_support, 1350 &attr_pgr_support, 1351 &attr_emulate_rsoc, 1352 &attr_submit_type, 1353 &attr_atomic_alignment, 1354 &attr_atomic_max_len, 1355 &attr_atomic_granularity, 1356 &attr_atomic_max_with_boundary, 1357 &attr_atomic_max_boundary, 1358 NULL, 1359 }; 1360 EXPORT_SYMBOL(sbc_attrib_attrs); 1361 1362 /* 1363 * Minimal dev_attrib attributes for devices passing through CDBs. 1364 * In this case we only provide a few read-only attributes for 1365 * backwards compatibility. 1366 */ 1367 struct configfs_attribute *passthrough_attrib_attrs[] = { 1368 &attr_hw_pi_prot_type, 1369 &attr_hw_block_size, 1370 &attr_hw_max_sectors, 1371 &attr_hw_queue_depth, 1372 &attr_emulate_pr, 1373 &attr_alua_support, 1374 &attr_pgr_support, 1375 &attr_submit_type, 1376 NULL, 1377 }; 1378 EXPORT_SYMBOL(passthrough_attrib_attrs); 1379 1380 /* 1381 * pr related dev_attrib attributes for devices passing through CDBs, 1382 * but allowing in core pr emulation. 1383 */ 1384 struct configfs_attribute *passthrough_pr_attrib_attrs[] = { 1385 &attr_enforce_pr_isids, 1386 &attr_force_pr_aptpl, 1387 NULL, 1388 }; 1389 EXPORT_SYMBOL(passthrough_pr_attrib_attrs); 1390 1391 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL); 1392 TB_CIT_SETUP_DRV(dev_action, NULL, NULL); 1393 1394 /* End functions for struct config_item_type tb_dev_attrib_cit */ 1395 1396 /* Start functions for struct config_item_type tb_dev_wwn_cit */ 1397 1398 static struct t10_wwn *to_t10_wwn(struct config_item *item) 1399 { 1400 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group); 1401 } 1402 1403 static ssize_t target_check_inquiry_data(char *buf) 1404 { 1405 size_t len; 1406 int i; 1407 1408 len = strlen(buf); 1409 1410 /* 1411 * SPC 4.3.1: 1412 * ASCII data fields shall contain only ASCII printable characters 1413 * (i.e., code values 20h to 7Eh) and may be terminated with one or 1414 * more ASCII null (00h) characters. 1415 */ 1416 for (i = 0; i < len; i++) { 1417 if (buf[i] < 0x20 || buf[i] > 0x7E) { 1418 pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n"); 1419 return -EINVAL; 1420 } 1421 } 1422 1423 return len; 1424 } 1425 1426 /* 1427 * STANDARD and VPD page 0x83 T10 Vendor Identification 1428 */ 1429 static ssize_t target_wwn_vendor_id_show(struct config_item *item, 1430 char *page) 1431 { 1432 return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]); 1433 } 1434 1435 static ssize_t target_wwn_vendor_id_store(struct config_item *item, 1436 const char *page, size_t count) 1437 { 1438 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1439 struct se_device *dev = t10_wwn->t10_dev; 1440 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1441 unsigned char buf[INQUIRY_VENDOR_LEN + 2]; 1442 char *stripped = NULL; 1443 ssize_t len; 1444 ssize_t ret; 1445 1446 len = strscpy(buf, page); 1447 if (len > 0) { 1448 /* Strip any newline added from userspace. */ 1449 stripped = strstrip(buf); 1450 len = strlen(stripped); 1451 } 1452 if (len < 0 || len > INQUIRY_VENDOR_LEN) { 1453 pr_err("Emulated T10 Vendor Identification exceeds" 1454 " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN) 1455 "\n"); 1456 return -EOVERFLOW; 1457 } 1458 1459 ret = target_check_inquiry_data(stripped); 1460 1461 if (ret < 0) 1462 return ret; 1463 1464 /* 1465 * Check to see if any active exports exist. If they do exist, fail 1466 * here as changing this information on the fly (underneath the 1467 * initiator side OS dependent multipath code) could cause negative 1468 * effects. 1469 */ 1470 if (dev->export_count) { 1471 pr_err("Unable to set T10 Vendor Identification while" 1472 " active %d exports exist\n", dev->export_count); 1473 return -EINVAL; 1474 } 1475 1476 BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1); 1477 strscpy(dev->t10_wwn.vendor, stripped); 1478 1479 pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:" 1480 " %s\n", dev->t10_wwn.vendor); 1481 1482 return count; 1483 } 1484 1485 static ssize_t target_wwn_product_id_show(struct config_item *item, 1486 char *page) 1487 { 1488 return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]); 1489 } 1490 1491 static ssize_t target_wwn_product_id_store(struct config_item *item, 1492 const char *page, size_t count) 1493 { 1494 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1495 struct se_device *dev = t10_wwn->t10_dev; 1496 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1497 unsigned char buf[INQUIRY_MODEL_LEN + 2]; 1498 char *stripped = NULL; 1499 ssize_t len; 1500 ssize_t ret; 1501 1502 len = strscpy(buf, page); 1503 if (len > 0) { 1504 /* Strip any newline added from userspace. */ 1505 stripped = strstrip(buf); 1506 len = strlen(stripped); 1507 } 1508 if (len < 0 || len > INQUIRY_MODEL_LEN) { 1509 pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: " 1510 __stringify(INQUIRY_MODEL_LEN) 1511 "\n"); 1512 return -EOVERFLOW; 1513 } 1514 1515 ret = target_check_inquiry_data(stripped); 1516 1517 if (ret < 0) 1518 return ret; 1519 1520 /* 1521 * Check to see if any active exports exist. If they do exist, fail 1522 * here as changing this information on the fly (underneath the 1523 * initiator side OS dependent multipath code) could cause negative 1524 * effects. 1525 */ 1526 if (dev->export_count) { 1527 pr_err("Unable to set T10 Model while active %d exports exist\n", 1528 dev->export_count); 1529 return -EINVAL; 1530 } 1531 1532 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); 1533 strscpy(dev->t10_wwn.model, stripped); 1534 1535 pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n", 1536 dev->t10_wwn.model); 1537 1538 return count; 1539 } 1540 1541 static ssize_t target_wwn_revision_show(struct config_item *item, 1542 char *page) 1543 { 1544 return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]); 1545 } 1546 1547 static ssize_t target_wwn_revision_store(struct config_item *item, 1548 const char *page, size_t count) 1549 { 1550 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1551 struct se_device *dev = t10_wwn->t10_dev; 1552 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1553 unsigned char buf[INQUIRY_REVISION_LEN + 2]; 1554 char *stripped = NULL; 1555 ssize_t len; 1556 ssize_t ret; 1557 1558 len = strscpy(buf, page); 1559 if (len > 0) { 1560 /* Strip any newline added from userspace. */ 1561 stripped = strstrip(buf); 1562 len = strlen(stripped); 1563 } 1564 if (len < 0 || len > INQUIRY_REVISION_LEN) { 1565 pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: " 1566 __stringify(INQUIRY_REVISION_LEN) 1567 "\n"); 1568 return -EOVERFLOW; 1569 } 1570 1571 ret = target_check_inquiry_data(stripped); 1572 1573 if (ret < 0) 1574 return ret; 1575 1576 /* 1577 * Check to see if any active exports exist. If they do exist, fail 1578 * here as changing this information on the fly (underneath the 1579 * initiator side OS dependent multipath code) could cause negative 1580 * effects. 1581 */ 1582 if (dev->export_count) { 1583 pr_err("Unable to set T10 Revision while active %d exports exist\n", 1584 dev->export_count); 1585 return -EINVAL; 1586 } 1587 1588 BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1); 1589 strscpy(dev->t10_wwn.revision, stripped); 1590 1591 pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n", 1592 dev->t10_wwn.revision); 1593 1594 return count; 1595 } 1596 1597 static ssize_t 1598 target_wwn_company_id_show(struct config_item *item, 1599 char *page) 1600 { 1601 return snprintf(page, PAGE_SIZE, "%#08x\n", 1602 to_t10_wwn(item)->company_id); 1603 } 1604 1605 static ssize_t 1606 target_wwn_company_id_store(struct config_item *item, 1607 const char *page, size_t count) 1608 { 1609 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1610 struct se_device *dev = t10_wwn->t10_dev; 1611 u32 val; 1612 int ret; 1613 1614 /* 1615 * The IEEE COMPANY_ID field should contain a 24-bit canonical 1616 * form OUI assigned by the IEEE. 1617 */ 1618 ret = kstrtou32(page, 0, &val); 1619 if (ret < 0) 1620 return ret; 1621 1622 if (val >= 0x1000000) 1623 return -EOVERFLOW; 1624 1625 /* 1626 * Check to see if any active exports exist. If they do exist, fail 1627 * here as changing this information on the fly (underneath the 1628 * initiator side OS dependent multipath code) could cause negative 1629 * effects. 1630 */ 1631 if (dev->export_count) { 1632 pr_err("Unable to set Company ID while %u exports exist\n", 1633 dev->export_count); 1634 return -EINVAL; 1635 } 1636 1637 t10_wwn->company_id = val; 1638 1639 pr_debug("Target_Core_ConfigFS: Set IEEE Company ID: %#08x\n", 1640 t10_wwn->company_id); 1641 1642 return count; 1643 } 1644 1645 /* 1646 * VPD page 0x80 Unit serial 1647 */ 1648 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item, 1649 char *page) 1650 { 1651 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 1652 &to_t10_wwn(item)->unit_serial[0]); 1653 } 1654 1655 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item, 1656 const char *page, size_t count) 1657 { 1658 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1659 struct se_device *dev = t10_wwn->t10_dev; 1660 unsigned char buf[INQUIRY_VPD_SERIAL_LEN] = { }; 1661 1662 /* 1663 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 1664 * from the struct scsi_device level firmware, do not allow 1665 * VPD Unit Serial to be emulated. 1666 * 1667 * Note this struct scsi_device could also be emulating VPD 1668 * information from its drivers/scsi LLD. But for now we assume 1669 * it is doing 'the right thing' wrt a world wide unique 1670 * VPD Unit Serial Number that OS dependent multipath can depend on. 1671 */ 1672 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) { 1673 pr_err("Underlying SCSI device firmware provided VPD" 1674 " Unit Serial, ignoring request\n"); 1675 return -EOPNOTSUPP; 1676 } 1677 1678 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 1679 pr_err("Emulated VPD Unit Serial exceeds" 1680 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 1681 return -EOVERFLOW; 1682 } 1683 /* 1684 * Check to see if any active $FABRIC_MOD exports exist. If they 1685 * do exist, fail here as changing this information on the fly 1686 * (underneath the initiator side OS dependent multipath code) 1687 * could cause negative effects. 1688 */ 1689 if (dev->export_count) { 1690 pr_err("Unable to set VPD Unit Serial while" 1691 " active %d $FABRIC_MOD exports exist\n", 1692 dev->export_count); 1693 return -EINVAL; 1694 } 1695 1696 /* 1697 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 1698 * 1699 * Also, strip any newline added from the userspace 1700 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 1701 */ 1702 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 1703 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 1704 "%s", strstrip(buf)); 1705 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL; 1706 1707 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 1708 " %s\n", dev->t10_wwn.unit_serial); 1709 1710 return count; 1711 } 1712 1713 /* 1714 * VPD page 0x83 Protocol Identifier 1715 */ 1716 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item, 1717 char *page) 1718 { 1719 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1720 struct t10_vpd *vpd; 1721 unsigned char buf[VPD_TMP_BUF_SIZE] = { }; 1722 ssize_t len = 0; 1723 1724 spin_lock(&t10_wwn->t10_vpd_lock); 1725 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 1726 if (!vpd->protocol_identifier_set) 1727 continue; 1728 1729 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 1730 1731 if (len + strlen(buf) >= PAGE_SIZE) 1732 break; 1733 1734 len += sprintf(page+len, "%s", buf); 1735 } 1736 spin_unlock(&t10_wwn->t10_vpd_lock); 1737 1738 return len; 1739 } 1740 1741 static ssize_t target_wwn_pd_text_id_info_show(struct config_item *item, 1742 char *page) 1743 { 1744 return sysfs_emit(page, "%s\n", &to_t10_wwn(item)->pd_text_id_info[0]); 1745 } 1746 1747 static ssize_t target_wwn_pd_text_id_info_store(struct config_item *item, 1748 const char *page, size_t count) 1749 { 1750 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1751 struct se_device *dev = t10_wwn->t10_dev; 1752 1753 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1754 unsigned char buf[PD_TEXT_ID_INFO_LEN + 2]; 1755 char *stripped; 1756 1757 /* 1758 * Check to see if any active exports exist. If they do exist, fail 1759 * here as changing this information on the fly (underneath the 1760 * initiator side OS dependent multipath code) could cause negative 1761 * effects. 1762 */ 1763 if (dev->export_count) { 1764 pr_err("Unable to set the peripheral device text id info while active %d exports exist\n", 1765 dev->export_count); 1766 return -EINVAL; 1767 } 1768 1769 if (strscpy(buf, page, sizeof(buf)) < 0) 1770 return -EOVERFLOW; 1771 1772 /* Strip any newline added from userspace. */ 1773 stripped = strstrip(buf); 1774 if (strlen(stripped) >= PD_TEXT_ID_INFO_LEN) { 1775 pr_err("Emulated peripheral device text id info exceeds PD_TEXT_ID_INFO_LEN: " __stringify(PD_TEXT_ID_INFO_LEN "\n")); 1776 return -EOVERFLOW; 1777 } 1778 1779 BUILD_BUG_ON(sizeof(dev->t10_wwn.pd_text_id_info) != PD_TEXT_ID_INFO_LEN); 1780 strscpy(dev->t10_wwn.pd_text_id_info, stripped, 1781 sizeof(dev->t10_wwn.pd_text_id_info)); 1782 1783 pr_debug("Target_Core_ConfigFS: Set emulated peripheral dev text id info:" 1784 " %s\n", dev->t10_wwn.pd_text_id_info); 1785 1786 return count; 1787 } 1788 1789 /* 1790 * Generic wrapper for dumping VPD identifiers by association. 1791 */ 1792 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 1793 static ssize_t target_wwn_##_name##_show(struct config_item *item, \ 1794 char *page) \ 1795 { \ 1796 struct t10_wwn *t10_wwn = to_t10_wwn(item); \ 1797 struct t10_vpd *vpd; \ 1798 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 1799 ssize_t len = 0; \ 1800 \ 1801 spin_lock(&t10_wwn->t10_vpd_lock); \ 1802 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 1803 if (vpd->association != _assoc) \ 1804 continue; \ 1805 \ 1806 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1807 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 1808 if (len + strlen(buf) >= PAGE_SIZE) \ 1809 break; \ 1810 len += sprintf(page+len, "%s", buf); \ 1811 \ 1812 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1813 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 1814 if (len + strlen(buf) >= PAGE_SIZE) \ 1815 break; \ 1816 len += sprintf(page+len, "%s", buf); \ 1817 \ 1818 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1819 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 1820 if (len + strlen(buf) >= PAGE_SIZE) \ 1821 break; \ 1822 len += sprintf(page+len, "%s", buf); \ 1823 } \ 1824 spin_unlock(&t10_wwn->t10_vpd_lock); \ 1825 \ 1826 return len; \ 1827 } 1828 1829 /* VPD page 0x83 Association: Logical Unit */ 1830 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 1831 /* VPD page 0x83 Association: Target Port */ 1832 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 1833 /* VPD page 0x83 Association: SCSI Target Device */ 1834 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 1835 1836 CONFIGFS_ATTR(target_wwn_, vendor_id); 1837 CONFIGFS_ATTR(target_wwn_, product_id); 1838 CONFIGFS_ATTR(target_wwn_, revision); 1839 CONFIGFS_ATTR(target_wwn_, company_id); 1840 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial); 1841 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier); 1842 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit); 1843 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port); 1844 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device); 1845 CONFIGFS_ATTR(target_wwn_, pd_text_id_info); 1846 1847 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 1848 &target_wwn_attr_vendor_id, 1849 &target_wwn_attr_product_id, 1850 &target_wwn_attr_revision, 1851 &target_wwn_attr_company_id, 1852 &target_wwn_attr_vpd_unit_serial, 1853 &target_wwn_attr_vpd_protocol_identifier, 1854 &target_wwn_attr_vpd_assoc_logical_unit, 1855 &target_wwn_attr_vpd_assoc_target_port, 1856 &target_wwn_attr_vpd_assoc_scsi_target_device, 1857 &target_wwn_attr_pd_text_id_info, 1858 NULL, 1859 }; 1860 1861 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs); 1862 1863 /* End functions for struct config_item_type tb_dev_wwn_cit */ 1864 1865 /* Start functions for struct config_item_type tb_dev_pr_cit */ 1866 1867 static struct se_device *pr_to_dev(struct config_item *item) 1868 { 1869 return container_of(to_config_group(item), struct se_device, 1870 dev_pr_group); 1871 } 1872 1873 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev, 1874 char *page) 1875 { 1876 struct se_node_acl *se_nacl; 1877 struct t10_pr_registration *pr_reg; 1878 char i_buf[PR_REG_ISID_ID_LEN] = { }; 1879 1880 pr_reg = dev->dev_pr_res_holder; 1881 if (!pr_reg) 1882 return sprintf(page, "No SPC-3 Reservation holder\n"); 1883 1884 se_nacl = pr_reg->pr_reg_nacl; 1885 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1886 1887 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", 1888 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1889 se_nacl->initiatorname, i_buf); 1890 } 1891 1892 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, 1893 char *page) 1894 { 1895 struct se_session *sess = dev->reservation_holder; 1896 struct se_node_acl *se_nacl; 1897 ssize_t len; 1898 1899 if (sess) { 1900 se_nacl = sess->se_node_acl; 1901 len = sprintf(page, 1902 "SPC-2 Reservation: %s Initiator: %s\n", 1903 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1904 se_nacl->initiatorname); 1905 } else { 1906 len = sprintf(page, "No SPC-2 Reservation holder\n"); 1907 } 1908 return len; 1909 } 1910 1911 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page) 1912 { 1913 struct se_device *dev = pr_to_dev(item); 1914 int ret; 1915 1916 if (!dev->dev_attrib.emulate_pr) 1917 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 1918 1919 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1920 return sprintf(page, "Passthrough\n"); 1921 1922 spin_lock(&dev->dev_reservation_lock); 1923 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1924 ret = target_core_dev_pr_show_spc2_res(dev, page); 1925 else 1926 ret = target_core_dev_pr_show_spc3_res(dev, page); 1927 spin_unlock(&dev->dev_reservation_lock); 1928 return ret; 1929 } 1930 1931 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item, 1932 char *page) 1933 { 1934 struct se_device *dev = pr_to_dev(item); 1935 ssize_t len = 0; 1936 1937 spin_lock(&dev->dev_reservation_lock); 1938 if (!dev->dev_pr_res_holder) { 1939 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1940 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { 1941 len = sprintf(page, "SPC-3 Reservation: All Target" 1942 " Ports registration\n"); 1943 } else { 1944 len = sprintf(page, "SPC-3 Reservation: Single" 1945 " Target Port registration\n"); 1946 } 1947 1948 spin_unlock(&dev->dev_reservation_lock); 1949 return len; 1950 } 1951 1952 static ssize_t target_pr_res_pr_generation_show(struct config_item *item, 1953 char *page) 1954 { 1955 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation); 1956 } 1957 1958 1959 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item, 1960 char *page) 1961 { 1962 struct se_device *dev = pr_to_dev(item); 1963 struct se_node_acl *se_nacl; 1964 struct se_portal_group *se_tpg; 1965 struct t10_pr_registration *pr_reg; 1966 const struct target_core_fabric_ops *tfo; 1967 ssize_t len = 0; 1968 1969 spin_lock(&dev->dev_reservation_lock); 1970 pr_reg = dev->dev_pr_res_holder; 1971 if (!pr_reg) { 1972 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1973 goto out_unlock; 1974 } 1975 1976 se_nacl = pr_reg->pr_reg_nacl; 1977 se_tpg = se_nacl->se_tpg; 1978 tfo = se_tpg->se_tpg_tfo; 1979 1980 len += sprintf(page+len, "SPC-3 Reservation: %s" 1981 " Target Node Endpoint: %s\n", tfo->fabric_name, 1982 tfo->tpg_get_wwn(se_tpg)); 1983 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1984 " Identifier Tag: %hu %s Portal Group Tag: %hu" 1985 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi, 1986 tfo->fabric_name, tfo->tpg_get_tag(se_tpg), 1987 tfo->fabric_name, pr_reg->pr_aptpl_target_lun); 1988 1989 out_unlock: 1990 spin_unlock(&dev->dev_reservation_lock); 1991 return len; 1992 } 1993 1994 1995 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item, 1996 char *page) 1997 { 1998 struct se_device *dev = pr_to_dev(item); 1999 const struct target_core_fabric_ops *tfo; 2000 struct t10_pr_registration *pr_reg; 2001 unsigned char buf[384]; 2002 char i_buf[PR_REG_ISID_ID_LEN]; 2003 ssize_t len = 0; 2004 int reg_count = 0; 2005 2006 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 2007 2008 spin_lock(&dev->t10_pr.registration_lock); 2009 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 2010 pr_reg_list) { 2011 2012 memset(buf, 0, 384); 2013 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 2014 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 2015 core_pr_dump_initiator_port(pr_reg, i_buf, 2016 PR_REG_ISID_ID_LEN); 2017 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 2018 tfo->fabric_name, 2019 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, 2020 pr_reg->pr_res_generation); 2021 2022 if (len + strlen(buf) >= PAGE_SIZE) 2023 break; 2024 2025 len += sprintf(page+len, "%s", buf); 2026 reg_count++; 2027 } 2028 spin_unlock(&dev->t10_pr.registration_lock); 2029 2030 if (!reg_count) 2031 len += sprintf(page+len, "None\n"); 2032 2033 return len; 2034 } 2035 2036 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page) 2037 { 2038 struct se_device *dev = pr_to_dev(item); 2039 struct t10_pr_registration *pr_reg; 2040 ssize_t len = 0; 2041 2042 spin_lock(&dev->dev_reservation_lock); 2043 pr_reg = dev->dev_pr_res_holder; 2044 if (pr_reg) { 2045 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 2046 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 2047 } else { 2048 len = sprintf(page, "No SPC-3 Reservation holder\n"); 2049 } 2050 2051 spin_unlock(&dev->dev_reservation_lock); 2052 return len; 2053 } 2054 2055 static ssize_t target_pr_res_type_show(struct config_item *item, char *page) 2056 { 2057 struct se_device *dev = pr_to_dev(item); 2058 2059 if (!dev->dev_attrib.emulate_pr) 2060 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 2061 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 2062 return sprintf(page, "SPC_PASSTHROUGH\n"); 2063 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 2064 return sprintf(page, "SPC2_RESERVATIONS\n"); 2065 2066 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 2067 } 2068 2069 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item, 2070 char *page) 2071 { 2072 struct se_device *dev = pr_to_dev(item); 2073 2074 if (!dev->dev_attrib.emulate_pr || 2075 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 2076 return 0; 2077 2078 return sprintf(page, "APTPL Bit Status: %s\n", 2079 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 2080 } 2081 2082 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item, 2083 char *page) 2084 { 2085 struct se_device *dev = pr_to_dev(item); 2086 2087 if (!dev->dev_attrib.emulate_pr || 2088 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 2089 return 0; 2090 2091 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 2092 } 2093 2094 enum { 2095 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 2096 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 2097 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 2098 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 2099 }; 2100 2101 static match_table_t tokens = { 2102 {Opt_initiator_fabric, "initiator_fabric=%s"}, 2103 {Opt_initiator_node, "initiator_node=%s"}, 2104 {Opt_initiator_sid, "initiator_sid=%s"}, 2105 {Opt_sa_res_key, "sa_res_key=%s"}, 2106 {Opt_res_holder, "res_holder=%d"}, 2107 {Opt_res_type, "res_type=%d"}, 2108 {Opt_res_scope, "res_scope=%d"}, 2109 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 2110 {Opt_mapped_lun, "mapped_lun=%u"}, 2111 {Opt_target_fabric, "target_fabric=%s"}, 2112 {Opt_target_node, "target_node=%s"}, 2113 {Opt_tpgt, "tpgt=%d"}, 2114 {Opt_port_rtpi, "port_rtpi=%d"}, 2115 {Opt_target_lun, "target_lun=%u"}, 2116 {Opt_err, NULL} 2117 }; 2118 2119 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item, 2120 const char *page, size_t count) 2121 { 2122 struct se_device *dev = pr_to_dev(item); 2123 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 2124 unsigned char *t_fabric = NULL, *t_port = NULL; 2125 char *orig, *ptr, *opts; 2126 substring_t args[MAX_OPT_ARGS]; 2127 unsigned long long tmp_ll; 2128 u64 sa_res_key = 0; 2129 u64 mapped_lun = 0, target_lun = 0; 2130 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 2131 u16 tpgt = 0; 2132 u8 type = 0; 2133 2134 if (!dev->dev_attrib.emulate_pr || 2135 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 2136 return count; 2137 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 2138 return count; 2139 2140 if (dev->export_count) { 2141 pr_debug("Unable to process APTPL metadata while" 2142 " active fabric exports exist\n"); 2143 return -EINVAL; 2144 } 2145 2146 opts = kstrdup(page, GFP_KERNEL); 2147 if (!opts) 2148 return -ENOMEM; 2149 2150 orig = opts; 2151 while ((ptr = strsep(&opts, ",\n")) != NULL) { 2152 if (!*ptr) 2153 continue; 2154 2155 token = match_token(ptr, tokens, args); 2156 switch (token) { 2157 case Opt_initiator_fabric: 2158 i_fabric = match_strdup(args); 2159 if (!i_fabric) { 2160 ret = -ENOMEM; 2161 goto out; 2162 } 2163 break; 2164 case Opt_initiator_node: 2165 i_port = match_strdup(args); 2166 if (!i_port) { 2167 ret = -ENOMEM; 2168 goto out; 2169 } 2170 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 2171 pr_err("APTPL metadata initiator_node=" 2172 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 2173 PR_APTPL_MAX_IPORT_LEN); 2174 ret = -EINVAL; 2175 break; 2176 } 2177 break; 2178 case Opt_initiator_sid: 2179 isid = match_strdup(args); 2180 if (!isid) { 2181 ret = -ENOMEM; 2182 goto out; 2183 } 2184 if (strlen(isid) >= PR_REG_ISID_LEN) { 2185 pr_err("APTPL metadata initiator_isid" 2186 "= exceeds PR_REG_ISID_LEN: %d\n", 2187 PR_REG_ISID_LEN); 2188 ret = -EINVAL; 2189 break; 2190 } 2191 break; 2192 case Opt_sa_res_key: 2193 ret = match_u64(args, &tmp_ll); 2194 if (ret < 0) { 2195 pr_err("kstrtoull() failed for sa_res_key=\n"); 2196 goto out; 2197 } 2198 sa_res_key = (u64)tmp_ll; 2199 break; 2200 /* 2201 * PR APTPL Metadata for Reservation 2202 */ 2203 case Opt_res_holder: 2204 ret = match_int(args, &arg); 2205 if (ret) 2206 goto out; 2207 res_holder = arg; 2208 break; 2209 case Opt_res_type: 2210 ret = match_int(args, &arg); 2211 if (ret) 2212 goto out; 2213 type = (u8)arg; 2214 break; 2215 case Opt_res_scope: 2216 ret = match_int(args, &arg); 2217 if (ret) 2218 goto out; 2219 break; 2220 case Opt_res_all_tg_pt: 2221 ret = match_int(args, &arg); 2222 if (ret) 2223 goto out; 2224 all_tg_pt = (int)arg; 2225 break; 2226 case Opt_mapped_lun: 2227 ret = match_u64(args, &tmp_ll); 2228 if (ret) 2229 goto out; 2230 mapped_lun = (u64)tmp_ll; 2231 break; 2232 /* 2233 * PR APTPL Metadata for Target Port 2234 */ 2235 case Opt_target_fabric: 2236 t_fabric = match_strdup(args); 2237 if (!t_fabric) { 2238 ret = -ENOMEM; 2239 goto out; 2240 } 2241 break; 2242 case Opt_target_node: 2243 t_port = match_strdup(args); 2244 if (!t_port) { 2245 ret = -ENOMEM; 2246 goto out; 2247 } 2248 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 2249 pr_err("APTPL metadata target_node=" 2250 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 2251 PR_APTPL_MAX_TPORT_LEN); 2252 ret = -EINVAL; 2253 break; 2254 } 2255 break; 2256 case Opt_tpgt: 2257 ret = match_int(args, &arg); 2258 if (ret) 2259 goto out; 2260 tpgt = (u16)arg; 2261 break; 2262 case Opt_port_rtpi: 2263 ret = match_int(args, &arg); 2264 if (ret) 2265 goto out; 2266 break; 2267 case Opt_target_lun: 2268 ret = match_u64(args, &tmp_ll); 2269 if (ret) 2270 goto out; 2271 target_lun = (u64)tmp_ll; 2272 break; 2273 default: 2274 break; 2275 } 2276 } 2277 2278 if (!i_port || !t_port || !sa_res_key) { 2279 pr_err("Illegal parameters for APTPL registration\n"); 2280 ret = -EINVAL; 2281 goto out; 2282 } 2283 2284 if (res_holder && !(type)) { 2285 pr_err("Illegal PR type: 0x%02x for reservation" 2286 " holder\n", type); 2287 ret = -EINVAL; 2288 goto out; 2289 } 2290 2291 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, 2292 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 2293 res_holder, all_tg_pt, type); 2294 out: 2295 kfree(i_fabric); 2296 kfree(i_port); 2297 kfree(isid); 2298 kfree(t_fabric); 2299 kfree(t_port); 2300 kfree(orig); 2301 return (ret == 0) ? count : ret; 2302 } 2303 2304 2305 CONFIGFS_ATTR_RO(target_pr_, res_holder); 2306 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts); 2307 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation); 2308 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port); 2309 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts); 2310 CONFIGFS_ATTR_RO(target_pr_, res_pr_type); 2311 CONFIGFS_ATTR_RO(target_pr_, res_type); 2312 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active); 2313 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata); 2314 2315 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 2316 &target_pr_attr_res_holder, 2317 &target_pr_attr_res_pr_all_tgt_pts, 2318 &target_pr_attr_res_pr_generation, 2319 &target_pr_attr_res_pr_holder_tg_port, 2320 &target_pr_attr_res_pr_registered_i_pts, 2321 &target_pr_attr_res_pr_type, 2322 &target_pr_attr_res_type, 2323 &target_pr_attr_res_aptpl_active, 2324 &target_pr_attr_res_aptpl_metadata, 2325 NULL, 2326 }; 2327 2328 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs); 2329 2330 /* End functions for struct config_item_type tb_dev_pr_cit */ 2331 2332 /* Start functions for struct config_item_type tb_dev_cit */ 2333 2334 static inline struct se_device *to_device(struct config_item *item) 2335 { 2336 return container_of(to_config_group(item), struct se_device, dev_group); 2337 } 2338 2339 static ssize_t target_dev_info_show(struct config_item *item, char *page) 2340 { 2341 struct se_device *dev = to_device(item); 2342 int bl = 0; 2343 ssize_t read_bytes = 0; 2344 2345 transport_dump_dev_state(dev, page, &bl); 2346 read_bytes += bl; 2347 read_bytes += dev->transport->show_configfs_dev_params(dev, 2348 page+read_bytes); 2349 return read_bytes; 2350 } 2351 2352 static ssize_t target_dev_control_store(struct config_item *item, 2353 const char *page, size_t count) 2354 { 2355 struct se_device *dev = to_device(item); 2356 2357 return dev->transport->set_configfs_dev_params(dev, page, count); 2358 } 2359 2360 static ssize_t target_dev_alias_show(struct config_item *item, char *page) 2361 { 2362 struct se_device *dev = to_device(item); 2363 2364 if (!(dev->dev_flags & DF_USING_ALIAS)) 2365 return 0; 2366 2367 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); 2368 } 2369 2370 static ssize_t target_dev_alias_store(struct config_item *item, 2371 const char *page, size_t count) 2372 { 2373 struct se_device *dev = to_device(item); 2374 struct se_hba *hba = dev->se_hba; 2375 ssize_t read_bytes; 2376 2377 if (count > (SE_DEV_ALIAS_LEN-1)) { 2378 pr_err("alias count: %d exceeds" 2379 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 2380 SE_DEV_ALIAS_LEN-1); 2381 return -EINVAL; 2382 } 2383 2384 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); 2385 if (!read_bytes) 2386 return -EINVAL; 2387 if (dev->dev_alias[read_bytes - 1] == '\n') 2388 dev->dev_alias[read_bytes - 1] = '\0'; 2389 2390 dev->dev_flags |= DF_USING_ALIAS; 2391 2392 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 2393 config_item_name(&hba->hba_group.cg_item), 2394 config_item_name(&dev->dev_group.cg_item), 2395 dev->dev_alias); 2396 2397 return read_bytes; 2398 } 2399 2400 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page) 2401 { 2402 struct se_device *dev = to_device(item); 2403 2404 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) 2405 return 0; 2406 2407 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); 2408 } 2409 2410 static ssize_t target_dev_udev_path_store(struct config_item *item, 2411 const char *page, size_t count) 2412 { 2413 struct se_device *dev = to_device(item); 2414 struct se_hba *hba = dev->se_hba; 2415 ssize_t read_bytes; 2416 2417 if (count > (SE_UDEV_PATH_LEN-1)) { 2418 pr_err("udev_path count: %d exceeds" 2419 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 2420 SE_UDEV_PATH_LEN-1); 2421 return -EINVAL; 2422 } 2423 2424 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, 2425 "%s", page); 2426 if (!read_bytes) 2427 return -EINVAL; 2428 if (dev->udev_path[read_bytes - 1] == '\n') 2429 dev->udev_path[read_bytes - 1] = '\0'; 2430 2431 dev->dev_flags |= DF_USING_UDEV_PATH; 2432 2433 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 2434 config_item_name(&hba->hba_group.cg_item), 2435 config_item_name(&dev->dev_group.cg_item), 2436 dev->udev_path); 2437 2438 return read_bytes; 2439 } 2440 2441 static ssize_t target_dev_enable_show(struct config_item *item, char *page) 2442 { 2443 struct se_device *dev = to_device(item); 2444 2445 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev)); 2446 } 2447 2448 static ssize_t target_dev_enable_store(struct config_item *item, 2449 const char *page, size_t count) 2450 { 2451 struct se_device *dev = to_device(item); 2452 char *ptr; 2453 int ret; 2454 2455 ptr = strstr(page, "1"); 2456 if (!ptr) { 2457 pr_err("For dev_enable ops, only valid value" 2458 " is \"1\"\n"); 2459 return -EINVAL; 2460 } 2461 2462 ret = target_configure_device(dev); 2463 if (ret) 2464 return ret; 2465 return count; 2466 } 2467 2468 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page) 2469 { 2470 struct se_device *dev = to_device(item); 2471 struct config_item *lu_ci; 2472 struct t10_alua_lu_gp *lu_gp; 2473 struct t10_alua_lu_gp_member *lu_gp_mem; 2474 ssize_t len = 0; 2475 2476 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2477 if (!lu_gp_mem) 2478 return 0; 2479 2480 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2481 lu_gp = lu_gp_mem->lu_gp; 2482 if (lu_gp) { 2483 lu_ci = &lu_gp->lu_gp_group.cg_item; 2484 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 2485 config_item_name(lu_ci), lu_gp->lu_gp_id); 2486 } 2487 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2488 2489 return len; 2490 } 2491 2492 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item, 2493 const char *page, size_t count) 2494 { 2495 struct se_device *dev = to_device(item); 2496 struct se_hba *hba = dev->se_hba; 2497 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 2498 struct t10_alua_lu_gp_member *lu_gp_mem; 2499 unsigned char buf[LU_GROUP_NAME_BUF] = { }; 2500 int move = 0; 2501 2502 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2503 if (!lu_gp_mem) 2504 return count; 2505 2506 if (count > LU_GROUP_NAME_BUF) { 2507 pr_err("ALUA LU Group Alias too large!\n"); 2508 return -EINVAL; 2509 } 2510 memcpy(buf, page, count); 2511 /* 2512 * Any ALUA logical unit alias besides "NULL" means we will be 2513 * making a new group association. 2514 */ 2515 if (strcmp(strstrip(buf), "NULL")) { 2516 /* 2517 * core_alua_get_lu_gp_by_name() will increment reference to 2518 * struct t10_alua_lu_gp. This reference is released with 2519 * core_alua_get_lu_gp_by_name below(). 2520 */ 2521 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 2522 if (!lu_gp_new) 2523 return -ENODEV; 2524 } 2525 2526 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2527 lu_gp = lu_gp_mem->lu_gp; 2528 if (lu_gp) { 2529 /* 2530 * Clearing an existing lu_gp association, and replacing 2531 * with NULL 2532 */ 2533 if (!lu_gp_new) { 2534 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 2535 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 2536 " %hu\n", 2537 config_item_name(&hba->hba_group.cg_item), 2538 config_item_name(&dev->dev_group.cg_item), 2539 config_item_name(&lu_gp->lu_gp_group.cg_item), 2540 lu_gp->lu_gp_id); 2541 2542 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2543 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2544 2545 return count; 2546 } 2547 /* 2548 * Removing existing association of lu_gp_mem with lu_gp 2549 */ 2550 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2551 move = 1; 2552 } 2553 /* 2554 * Associate lu_gp_mem with lu_gp_new. 2555 */ 2556 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 2557 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2558 2559 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 2560 " core/alua/lu_gps/%s, ID: %hu\n", 2561 (move) ? "Moving" : "Adding", 2562 config_item_name(&hba->hba_group.cg_item), 2563 config_item_name(&dev->dev_group.cg_item), 2564 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 2565 lu_gp_new->lu_gp_id); 2566 2567 core_alua_put_lu_gp_from_name(lu_gp_new); 2568 return count; 2569 } 2570 2571 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page) 2572 { 2573 struct se_device *dev = to_device(item); 2574 struct t10_alua_lba_map *map; 2575 struct t10_alua_lba_map_member *mem; 2576 char *b = page; 2577 int bl = 0; 2578 char state; 2579 2580 spin_lock(&dev->t10_alua.lba_map_lock); 2581 if (!list_empty(&dev->t10_alua.lba_map_list)) 2582 bl += sprintf(b + bl, "%u %u\n", 2583 dev->t10_alua.lba_map_segment_size, 2584 dev->t10_alua.lba_map_segment_multiplier); 2585 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) { 2586 bl += sprintf(b + bl, "%llu %llu", 2587 map->lba_map_first_lba, map->lba_map_last_lba); 2588 list_for_each_entry(mem, &map->lba_map_mem_list, 2589 lba_map_mem_list) { 2590 switch (mem->lba_map_mem_alua_state) { 2591 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: 2592 state = 'O'; 2593 break; 2594 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: 2595 state = 'A'; 2596 break; 2597 case ALUA_ACCESS_STATE_STANDBY: 2598 state = 'S'; 2599 break; 2600 case ALUA_ACCESS_STATE_UNAVAILABLE: 2601 state = 'U'; 2602 break; 2603 default: 2604 state = '.'; 2605 break; 2606 } 2607 bl += sprintf(b + bl, " %d:%c", 2608 mem->lba_map_mem_alua_pg_id, state); 2609 } 2610 bl += sprintf(b + bl, "\n"); 2611 } 2612 spin_unlock(&dev->t10_alua.lba_map_lock); 2613 return bl; 2614 } 2615 2616 static ssize_t target_dev_lba_map_store(struct config_item *item, 2617 const char *page, size_t count) 2618 { 2619 struct se_device *dev = to_device(item); 2620 struct t10_alua_lba_map *lba_map = NULL; 2621 struct list_head lba_list; 2622 char *map_entries, *orig, *ptr; 2623 char state; 2624 int pg_num = -1, pg; 2625 int ret = 0, num = 0, pg_id, alua_state; 2626 unsigned long start_lba = -1, end_lba = -1; 2627 unsigned long segment_size = -1, segment_mult = -1; 2628 2629 orig = map_entries = kstrdup(page, GFP_KERNEL); 2630 if (!map_entries) 2631 return -ENOMEM; 2632 2633 INIT_LIST_HEAD(&lba_list); 2634 while ((ptr = strsep(&map_entries, "\n")) != NULL) { 2635 if (!*ptr) 2636 continue; 2637 2638 if (num == 0) { 2639 if (sscanf(ptr, "%lu %lu\n", 2640 &segment_size, &segment_mult) != 2) { 2641 pr_err("Invalid line %d\n", num); 2642 ret = -EINVAL; 2643 break; 2644 } 2645 num++; 2646 continue; 2647 } 2648 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) { 2649 pr_err("Invalid line %d\n", num); 2650 ret = -EINVAL; 2651 break; 2652 } 2653 ptr = strchr(ptr, ' '); 2654 if (!ptr) { 2655 pr_err("Invalid line %d, missing end lba\n", num); 2656 ret = -EINVAL; 2657 break; 2658 } 2659 ptr++; 2660 ptr = strchr(ptr, ' '); 2661 if (!ptr) { 2662 pr_err("Invalid line %d, missing state definitions\n", 2663 num); 2664 ret = -EINVAL; 2665 break; 2666 } 2667 ptr++; 2668 lba_map = core_alua_allocate_lba_map(&lba_list, 2669 start_lba, end_lba); 2670 if (IS_ERR(lba_map)) { 2671 ret = PTR_ERR(lba_map); 2672 break; 2673 } 2674 pg = 0; 2675 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) { 2676 switch (state) { 2677 case 'O': 2678 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED; 2679 break; 2680 case 'A': 2681 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED; 2682 break; 2683 case 'S': 2684 alua_state = ALUA_ACCESS_STATE_STANDBY; 2685 break; 2686 case 'U': 2687 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE; 2688 break; 2689 default: 2690 pr_err("Invalid ALUA state '%c'\n", state); 2691 ret = -EINVAL; 2692 goto out; 2693 } 2694 2695 ret = core_alua_allocate_lba_map_mem(lba_map, 2696 pg_id, alua_state); 2697 if (ret) { 2698 pr_err("Invalid target descriptor %d:%c " 2699 "at line %d\n", 2700 pg_id, state, num); 2701 break; 2702 } 2703 pg++; 2704 ptr = strchr(ptr, ' '); 2705 if (ptr) 2706 ptr++; 2707 else 2708 break; 2709 } 2710 if (pg_num == -1) 2711 pg_num = pg; 2712 else if (pg != pg_num) { 2713 pr_err("Only %d from %d port groups definitions " 2714 "at line %d\n", pg, pg_num, num); 2715 ret = -EINVAL; 2716 break; 2717 } 2718 num++; 2719 } 2720 out: 2721 if (ret) { 2722 core_alua_free_lba_map(&lba_list); 2723 count = ret; 2724 } else 2725 core_alua_set_lba_map(dev, &lba_list, 2726 segment_size, segment_mult); 2727 kfree(orig); 2728 return count; 2729 } 2730 2731 CONFIGFS_ATTR_RO(target_dev_, info); 2732 CONFIGFS_ATTR_WO(target_dev_, control); 2733 CONFIGFS_ATTR(target_dev_, alias); 2734 CONFIGFS_ATTR(target_dev_, udev_path); 2735 CONFIGFS_ATTR(target_dev_, enable); 2736 CONFIGFS_ATTR(target_dev_, alua_lu_gp); 2737 CONFIGFS_ATTR(target_dev_, lba_map); 2738 2739 static struct configfs_attribute *target_core_dev_attrs[] = { 2740 &target_dev_attr_info, 2741 &target_dev_attr_control, 2742 &target_dev_attr_alias, 2743 &target_dev_attr_udev_path, 2744 &target_dev_attr_enable, 2745 &target_dev_attr_alua_lu_gp, 2746 &target_dev_attr_lba_map, 2747 NULL, 2748 }; 2749 2750 static void target_core_dev_release(struct config_item *item) 2751 { 2752 struct config_group *dev_cg = to_config_group(item); 2753 struct se_device *dev = 2754 container_of(dev_cg, struct se_device, dev_group); 2755 2756 target_free_device(dev); 2757 } 2758 2759 /* 2760 * Used in target_core_fabric_configfs.c to verify valid se_device symlink 2761 * within target_fabric_port_link() 2762 */ 2763 struct configfs_item_operations target_core_dev_item_ops = { 2764 .release = target_core_dev_release, 2765 }; 2766 2767 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs); 2768 2769 /* End functions for struct config_item_type tb_dev_cit */ 2770 2771 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 2772 2773 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item) 2774 { 2775 return container_of(to_config_group(item), struct t10_alua_lu_gp, 2776 lu_gp_group); 2777 } 2778 2779 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page) 2780 { 2781 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2782 2783 if (!lu_gp->lu_gp_valid_id) 2784 return 0; 2785 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2786 } 2787 2788 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item, 2789 const char *page, size_t count) 2790 { 2791 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2792 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2793 unsigned long lu_gp_id; 2794 int ret; 2795 2796 ret = kstrtoul(page, 0, &lu_gp_id); 2797 if (ret < 0) { 2798 pr_err("kstrtoul() returned %d for" 2799 " lu_gp_id\n", ret); 2800 return ret; 2801 } 2802 if (lu_gp_id > 0x0000ffff) { 2803 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 2804 " 0x0000ffff\n", lu_gp_id); 2805 return -EINVAL; 2806 } 2807 2808 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2809 if (ret < 0) 2810 return -EINVAL; 2811 2812 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 2813 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2814 config_item_name(&alua_lu_gp_cg->cg_item), 2815 lu_gp->lu_gp_id); 2816 2817 return count; 2818 } 2819 2820 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page) 2821 { 2822 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2823 struct t10_alua_lu_gp_member *lu_gp_mem; 2824 const char *const end = page + PAGE_SIZE; 2825 char *cur = page; 2826 2827 spin_lock(&lu_gp->lu_gp_lock); 2828 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2829 struct se_device *dev = lu_gp_mem->lu_gp_mem_dev; 2830 struct se_hba *hba = dev->se_hba; 2831 2832 cur += scnprintf(cur, end - cur, "%s/%s\n", 2833 config_item_name(&hba->hba_group.cg_item), 2834 config_item_name(&dev->dev_group.cg_item)); 2835 if (WARN_ON_ONCE(cur >= end)) 2836 break; 2837 } 2838 spin_unlock(&lu_gp->lu_gp_lock); 2839 2840 return cur - page; 2841 } 2842 2843 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id); 2844 CONFIGFS_ATTR_RO(target_lu_gp_, members); 2845 2846 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2847 &target_lu_gp_attr_lu_gp_id, 2848 &target_lu_gp_attr_members, 2849 NULL, 2850 }; 2851 2852 static void target_core_alua_lu_gp_release(struct config_item *item) 2853 { 2854 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2855 struct t10_alua_lu_gp, lu_gp_group); 2856 2857 core_alua_free_lu_gp(lu_gp); 2858 } 2859 2860 static const struct configfs_item_operations target_core_alua_lu_gp_ops = { 2861 .release = target_core_alua_lu_gp_release, 2862 }; 2863 2864 static const struct config_item_type target_core_alua_lu_gp_cit = { 2865 .ct_item_ops = &target_core_alua_lu_gp_ops, 2866 .ct_attrs = target_core_alua_lu_gp_attrs, 2867 .ct_owner = THIS_MODULE, 2868 }; 2869 2870 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2871 2872 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2873 2874 static struct config_group *target_core_alua_create_lu_gp( 2875 struct config_group *group, 2876 const char *name) 2877 { 2878 struct t10_alua_lu_gp *lu_gp; 2879 struct config_group *alua_lu_gp_cg = NULL; 2880 struct config_item *alua_lu_gp_ci = NULL; 2881 2882 lu_gp = core_alua_allocate_lu_gp(name, 0); 2883 if (IS_ERR(lu_gp)) 2884 return NULL; 2885 2886 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2887 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2888 2889 config_group_init_type_name(alua_lu_gp_cg, name, 2890 &target_core_alua_lu_gp_cit); 2891 2892 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2893 " Group: core/alua/lu_gps/%s\n", 2894 config_item_name(alua_lu_gp_ci)); 2895 2896 return alua_lu_gp_cg; 2897 2898 } 2899 2900 static void target_core_alua_drop_lu_gp( 2901 struct config_group *group, 2902 struct config_item *item) 2903 { 2904 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2905 struct t10_alua_lu_gp, lu_gp_group); 2906 2907 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2908 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2909 config_item_name(item), lu_gp->lu_gp_id); 2910 /* 2911 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 2912 * -> target_core_alua_lu_gp_release() 2913 */ 2914 config_item_put(item); 2915 } 2916 2917 static const struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2918 .make_group = &target_core_alua_create_lu_gp, 2919 .drop_item = &target_core_alua_drop_lu_gp, 2920 }; 2921 2922 static const struct config_item_type target_core_alua_lu_gps_cit = { 2923 .ct_item_ops = NULL, 2924 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2925 .ct_owner = THIS_MODULE, 2926 }; 2927 2928 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2929 2930 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2931 2932 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item) 2933 { 2934 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp, 2935 tg_pt_gp_group); 2936 } 2937 2938 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item, 2939 char *page) 2940 { 2941 return sprintf(page, "%d\n", 2942 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state); 2943 } 2944 2945 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item, 2946 const char *page, size_t count) 2947 { 2948 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2949 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; 2950 unsigned long tmp; 2951 int new_state, ret; 2952 2953 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2954 pr_err("Unable to do implicit ALUA on invalid tg_pt_gp ID\n"); 2955 return -EINVAL; 2956 } 2957 if (!target_dev_configured(dev)) { 2958 pr_err("Unable to set alua_access_state while device is" 2959 " not configured\n"); 2960 return -ENODEV; 2961 } 2962 2963 ret = kstrtoul(page, 0, &tmp); 2964 if (ret < 0) { 2965 pr_err("Unable to extract new ALUA access state from" 2966 " %s\n", page); 2967 return ret; 2968 } 2969 new_state = (int)tmp; 2970 2971 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) { 2972 pr_err("Unable to process implicit configfs ALUA" 2973 " transition while TPGS_IMPLICIT_ALUA is disabled\n"); 2974 return -EINVAL; 2975 } 2976 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA && 2977 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) { 2978 /* LBA DEPENDENT is only allowed with implicit ALUA */ 2979 pr_err("Unable to process implicit configfs ALUA transition" 2980 " while explicit ALUA management is enabled\n"); 2981 return -EINVAL; 2982 } 2983 2984 ret = core_alua_do_port_transition(tg_pt_gp, dev, 2985 NULL, NULL, new_state, 0); 2986 return (!ret) ? count : -EINVAL; 2987 } 2988 2989 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item, 2990 char *page) 2991 { 2992 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2993 return sprintf(page, "%s\n", 2994 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2995 } 2996 2997 static ssize_t target_tg_pt_gp_alua_access_status_store( 2998 struct config_item *item, const char *page, size_t count) 2999 { 3000 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3001 unsigned long tmp; 3002 int new_status, ret; 3003 3004 if (!tg_pt_gp->tg_pt_gp_valid_id) { 3005 pr_err("Unable to set ALUA access status on invalid tg_pt_gp ID\n"); 3006 return -EINVAL; 3007 } 3008 3009 ret = kstrtoul(page, 0, &tmp); 3010 if (ret < 0) { 3011 pr_err("Unable to extract new ALUA access status" 3012 " from %s\n", page); 3013 return ret; 3014 } 3015 new_status = (int)tmp; 3016 3017 if ((new_status != ALUA_STATUS_NONE) && 3018 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && 3019 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { 3020 pr_err("Illegal ALUA access status: 0x%02x\n", 3021 new_status); 3022 return -EINVAL; 3023 } 3024 3025 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 3026 return count; 3027 } 3028 3029 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item, 3030 char *page) 3031 { 3032 return core_alua_show_access_type(to_tg_pt_gp(item), page); 3033 } 3034 3035 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item, 3036 const char *page, size_t count) 3037 { 3038 return core_alua_store_access_type(to_tg_pt_gp(item), page, count); 3039 } 3040 3041 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \ 3042 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \ 3043 struct config_item *item, char *p) \ 3044 { \ 3045 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 3046 return sprintf(p, "%d\n", \ 3047 !!(t->tg_pt_gp_alua_supported_states & _bit)); \ 3048 } \ 3049 \ 3050 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \ 3051 struct config_item *item, const char *p, size_t c) \ 3052 { \ 3053 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 3054 unsigned long tmp; \ 3055 int ret; \ 3056 \ 3057 if (!t->tg_pt_gp_valid_id) { \ 3058 pr_err("Unable to set " #_name " ALUA state on invalid tg_pt_gp ID\n"); \ 3059 return -EINVAL; \ 3060 } \ 3061 \ 3062 ret = kstrtoul(p, 0, &tmp); \ 3063 if (ret < 0) { \ 3064 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \ 3065 return -EINVAL; \ 3066 } \ 3067 if (tmp > 1) { \ 3068 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \ 3069 return -EINVAL; \ 3070 } \ 3071 if (tmp) \ 3072 t->tg_pt_gp_alua_supported_states |= _bit; \ 3073 else \ 3074 t->tg_pt_gp_alua_supported_states &= ~_bit; \ 3075 \ 3076 return c; \ 3077 } 3078 3079 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP); 3080 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP); 3081 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP); 3082 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP); 3083 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP); 3084 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP); 3085 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP); 3086 3087 static ssize_t target_tg_pt_gp_alua_write_metadata_show( 3088 struct config_item *item, char *page) 3089 { 3090 return sprintf(page, "%d\n", 3091 to_tg_pt_gp(item)->tg_pt_gp_write_metadata); 3092 } 3093 3094 static ssize_t target_tg_pt_gp_alua_write_metadata_store( 3095 struct config_item *item, const char *page, size_t count) 3096 { 3097 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3098 unsigned long tmp; 3099 int ret; 3100 3101 ret = kstrtoul(page, 0, &tmp); 3102 if (ret < 0) { 3103 pr_err("Unable to extract alua_write_metadata\n"); 3104 return ret; 3105 } 3106 3107 if ((tmp != 0) && (tmp != 1)) { 3108 pr_err("Illegal value for alua_write_metadata:" 3109 " %lu\n", tmp); 3110 return -EINVAL; 3111 } 3112 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 3113 3114 return count; 3115 } 3116 3117 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item, 3118 char *page) 3119 { 3120 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page); 3121 } 3122 3123 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item, 3124 const char *page, size_t count) 3125 { 3126 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page, 3127 count); 3128 } 3129 3130 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item, 3131 char *page) 3132 { 3133 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page); 3134 } 3135 3136 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item, 3137 const char *page, size_t count) 3138 { 3139 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page, 3140 count); 3141 } 3142 3143 static ssize_t target_tg_pt_gp_implicit_trans_secs_show( 3144 struct config_item *item, char *page) 3145 { 3146 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page); 3147 } 3148 3149 static ssize_t target_tg_pt_gp_implicit_trans_secs_store( 3150 struct config_item *item, const char *page, size_t count) 3151 { 3152 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page, 3153 count); 3154 } 3155 3156 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item, 3157 char *page) 3158 { 3159 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page); 3160 } 3161 3162 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item, 3163 const char *page, size_t count) 3164 { 3165 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count); 3166 } 3167 3168 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item, 3169 char *page) 3170 { 3171 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3172 3173 if (!tg_pt_gp->tg_pt_gp_valid_id) 3174 return 0; 3175 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 3176 } 3177 3178 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item, 3179 const char *page, size_t count) 3180 { 3181 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3182 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 3183 unsigned long tg_pt_gp_id; 3184 int ret; 3185 3186 ret = kstrtoul(page, 0, &tg_pt_gp_id); 3187 if (ret < 0) { 3188 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n", 3189 page); 3190 return ret; 3191 } 3192 if (tg_pt_gp_id > 0x0000ffff) { 3193 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n", 3194 tg_pt_gp_id); 3195 return -EINVAL; 3196 } 3197 3198 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 3199 if (ret < 0) 3200 return -EINVAL; 3201 3202 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 3203 "core/alua/tg_pt_gps/%s to ID: %hu\n", 3204 config_item_name(&alua_tg_pt_gp_cg->cg_item), 3205 tg_pt_gp->tg_pt_gp_id); 3206 3207 return count; 3208 } 3209 3210 static ssize_t target_tg_pt_gp_members_show(struct config_item *item, 3211 char *page) 3212 { 3213 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3214 struct se_lun *lun; 3215 ssize_t len = 0, cur_len; 3216 unsigned char buf[TG_PT_GROUP_NAME_BUF] = { }; 3217 3218 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 3219 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, 3220 lun_tg_pt_gp_link) { 3221 struct se_portal_group *tpg = lun->lun_tpg; 3222 3223 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 3224 "/%s\n", tpg->se_tpg_tfo->fabric_name, 3225 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 3226 tpg->se_tpg_tfo->tpg_get_tag(tpg), 3227 config_item_name(&lun->lun_group.cg_item)); 3228 cur_len++; /* Extra byte for NULL terminator */ 3229 3230 if ((cur_len + len) > PAGE_SIZE) { 3231 pr_warn("Ran out of lu_gp_show_attr" 3232 "_members buffer\n"); 3233 break; 3234 } 3235 memcpy(page+len, buf, cur_len); 3236 len += cur_len; 3237 } 3238 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 3239 3240 return len; 3241 } 3242 3243 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state); 3244 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status); 3245 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type); 3246 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning); 3247 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline); 3248 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent); 3249 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable); 3250 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby); 3251 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized); 3252 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized); 3253 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata); 3254 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs); 3255 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs); 3256 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs); 3257 CONFIGFS_ATTR(target_tg_pt_gp_, preferred); 3258 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id); 3259 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members); 3260 3261 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 3262 &target_tg_pt_gp_attr_alua_access_state, 3263 &target_tg_pt_gp_attr_alua_access_status, 3264 &target_tg_pt_gp_attr_alua_access_type, 3265 &target_tg_pt_gp_attr_alua_support_transitioning, 3266 &target_tg_pt_gp_attr_alua_support_offline, 3267 &target_tg_pt_gp_attr_alua_support_lba_dependent, 3268 &target_tg_pt_gp_attr_alua_support_unavailable, 3269 &target_tg_pt_gp_attr_alua_support_standby, 3270 &target_tg_pt_gp_attr_alua_support_active_nonoptimized, 3271 &target_tg_pt_gp_attr_alua_support_active_optimized, 3272 &target_tg_pt_gp_attr_alua_write_metadata, 3273 &target_tg_pt_gp_attr_nonop_delay_msecs, 3274 &target_tg_pt_gp_attr_trans_delay_msecs, 3275 &target_tg_pt_gp_attr_implicit_trans_secs, 3276 &target_tg_pt_gp_attr_preferred, 3277 &target_tg_pt_gp_attr_tg_pt_gp_id, 3278 &target_tg_pt_gp_attr_members, 3279 NULL, 3280 }; 3281 3282 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 3283 { 3284 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3285 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3286 3287 core_alua_free_tg_pt_gp(tg_pt_gp); 3288 } 3289 3290 static const struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 3291 .release = target_core_alua_tg_pt_gp_release, 3292 }; 3293 3294 static const struct config_item_type target_core_alua_tg_pt_gp_cit = { 3295 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 3296 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 3297 .ct_owner = THIS_MODULE, 3298 }; 3299 3300 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 3301 3302 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3303 3304 static struct config_group *target_core_alua_create_tg_pt_gp( 3305 struct config_group *group, 3306 const char *name) 3307 { 3308 struct t10_alua *alua = container_of(group, struct t10_alua, 3309 alua_tg_pt_gps_group); 3310 struct t10_alua_tg_pt_gp *tg_pt_gp; 3311 struct config_group *alua_tg_pt_gp_cg = NULL; 3312 struct config_item *alua_tg_pt_gp_ci = NULL; 3313 3314 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0); 3315 if (!tg_pt_gp) 3316 return NULL; 3317 3318 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 3319 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 3320 3321 config_group_init_type_name(alua_tg_pt_gp_cg, name, 3322 &target_core_alua_tg_pt_gp_cit); 3323 3324 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 3325 " Group: alua/tg_pt_gps/%s\n", 3326 config_item_name(alua_tg_pt_gp_ci)); 3327 3328 return alua_tg_pt_gp_cg; 3329 } 3330 3331 static void target_core_alua_drop_tg_pt_gp( 3332 struct config_group *group, 3333 struct config_item *item) 3334 { 3335 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3336 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3337 3338 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 3339 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 3340 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 3341 /* 3342 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 3343 * -> target_core_alua_tg_pt_gp_release(). 3344 */ 3345 config_item_put(item); 3346 } 3347 3348 static const struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 3349 .make_group = &target_core_alua_create_tg_pt_gp, 3350 .drop_item = &target_core_alua_drop_tg_pt_gp, 3351 }; 3352 3353 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL); 3354 3355 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3356 3357 /* Start functions for struct config_item_type target_core_alua_cit */ 3358 3359 /* 3360 * target_core_alua_cit is a ConfigFS group that lives under 3361 * /sys/kernel/config/target/core/alua. There are default groups 3362 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 3363 * target_core_alua_cit in target_core_init_configfs() below. 3364 */ 3365 static const struct config_item_type target_core_alua_cit = { 3366 .ct_item_ops = NULL, 3367 .ct_attrs = NULL, 3368 .ct_owner = THIS_MODULE, 3369 }; 3370 3371 /* End functions for struct config_item_type target_core_alua_cit */ 3372 3373 /* Start functions for struct config_item_type tb_dev_stat_cit */ 3374 3375 static struct config_group *target_core_stat_mkdir( 3376 struct config_group *group, 3377 const char *name) 3378 { 3379 return ERR_PTR(-ENOSYS); 3380 } 3381 3382 static void target_core_stat_rmdir( 3383 struct config_group *group, 3384 struct config_item *item) 3385 { 3386 return; 3387 } 3388 3389 static const struct configfs_group_operations target_core_stat_group_ops = { 3390 .make_group = &target_core_stat_mkdir, 3391 .drop_item = &target_core_stat_rmdir, 3392 }; 3393 3394 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL); 3395 3396 /* End functions for struct config_item_type tb_dev_stat_cit */ 3397 3398 /* Start functions for struct config_item_type target_core_hba_cit */ 3399 3400 static struct config_group *target_core_make_subdev( 3401 struct config_group *group, 3402 const char *name) 3403 { 3404 struct t10_alua_tg_pt_gp *tg_pt_gp; 3405 struct config_item *hba_ci = &group->cg_item; 3406 struct se_hba *hba = item_to_hba(hba_ci); 3407 struct target_backend *tb = hba->backend; 3408 struct se_device *dev; 3409 int errno = -ENOMEM, ret; 3410 3411 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 3412 if (ret) 3413 return ERR_PTR(ret); 3414 3415 dev = target_alloc_device(hba, name); 3416 if (!dev) 3417 goto out_unlock; 3418 3419 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit); 3420 3421 config_group_init_type_name(&dev->dev_action_group, "action", 3422 &tb->tb_dev_action_cit); 3423 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group); 3424 3425 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib", 3426 &tb->tb_dev_attrib_cit); 3427 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group); 3428 3429 config_group_init_type_name(&dev->dev_pr_group, "pr", 3430 &tb->tb_dev_pr_cit); 3431 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group); 3432 3433 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn", 3434 &tb->tb_dev_wwn_cit); 3435 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group, 3436 &dev->dev_group); 3437 3438 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group, 3439 "alua", &tb->tb_dev_alua_tg_pt_gps_cit); 3440 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group, 3441 &dev->dev_group); 3442 3443 config_group_init_type_name(&dev->dev_stat_grps.stat_group, 3444 "statistics", &tb->tb_dev_stat_cit); 3445 configfs_add_default_group(&dev->dev_stat_grps.stat_group, 3446 &dev->dev_group); 3447 3448 /* 3449 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 3450 */ 3451 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1); 3452 if (!tg_pt_gp) 3453 goto out_free_device; 3454 dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 3455 3456 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 3457 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 3458 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group, 3459 &dev->t10_alua.alua_tg_pt_gps_group); 3460 3461 /* 3462 * Add core/$HBA/$DEV/statistics/ default groups 3463 */ 3464 target_stat_setup_dev_default_groups(dev); 3465 3466 mutex_lock(&target_devices_lock); 3467 target_devices++; 3468 mutex_unlock(&target_devices_lock); 3469 3470 mutex_unlock(&hba->hba_access_mutex); 3471 return &dev->dev_group; 3472 3473 out_free_device: 3474 target_free_device(dev); 3475 out_unlock: 3476 mutex_unlock(&hba->hba_access_mutex); 3477 return ERR_PTR(errno); 3478 } 3479 3480 static void target_core_drop_subdev( 3481 struct config_group *group, 3482 struct config_item *item) 3483 { 3484 struct config_group *dev_cg = to_config_group(item); 3485 struct se_device *dev = 3486 container_of(dev_cg, struct se_device, dev_group); 3487 struct se_hba *hba; 3488 3489 hba = item_to_hba(&dev->se_hba->hba_group.cg_item); 3490 3491 mutex_lock(&hba->hba_access_mutex); 3492 3493 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group); 3494 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group); 3495 3496 /* 3497 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 3498 * directly from target_core_alua_tg_pt_gp_release(). 3499 */ 3500 dev->t10_alua.default_tg_pt_gp = NULL; 3501 3502 configfs_remove_default_groups(dev_cg); 3503 3504 /* 3505 * se_dev is released from target_core_dev_item_ops->release() 3506 */ 3507 config_item_put(item); 3508 3509 mutex_lock(&target_devices_lock); 3510 target_devices--; 3511 mutex_unlock(&target_devices_lock); 3512 3513 mutex_unlock(&hba->hba_access_mutex); 3514 } 3515 3516 static const struct configfs_group_operations target_core_hba_group_ops = { 3517 .make_group = target_core_make_subdev, 3518 .drop_item = target_core_drop_subdev, 3519 }; 3520 3521 3522 static inline struct se_hba *to_hba(struct config_item *item) 3523 { 3524 return container_of(to_config_group(item), struct se_hba, hba_group); 3525 } 3526 3527 static ssize_t target_hba_info_show(struct config_item *item, char *page) 3528 { 3529 struct se_hba *hba = to_hba(item); 3530 3531 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 3532 hba->hba_id, hba->backend->ops->name, 3533 TARGET_CORE_VERSION); 3534 } 3535 3536 static ssize_t target_hba_mode_show(struct config_item *item, char *page) 3537 { 3538 struct se_hba *hba = to_hba(item); 3539 int hba_mode = 0; 3540 3541 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 3542 hba_mode = 1; 3543 3544 return sprintf(page, "%d\n", hba_mode); 3545 } 3546 3547 static ssize_t target_hba_mode_store(struct config_item *item, 3548 const char *page, size_t count) 3549 { 3550 struct se_hba *hba = to_hba(item); 3551 unsigned long mode_flag; 3552 int ret; 3553 3554 if (hba->backend->ops->pmode_enable_hba == NULL) 3555 return -EINVAL; 3556 3557 ret = kstrtoul(page, 0, &mode_flag); 3558 if (ret < 0) { 3559 pr_err("Unable to extract hba mode flag: %d\n", ret); 3560 return ret; 3561 } 3562 3563 if (hba->dev_count) { 3564 pr_err("Unable to set hba_mode with active devices\n"); 3565 return -EINVAL; 3566 } 3567 3568 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag); 3569 if (ret < 0) 3570 return -EINVAL; 3571 if (ret > 0) 3572 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 3573 else if (ret == 0) 3574 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 3575 3576 return count; 3577 } 3578 3579 CONFIGFS_ATTR_RO(target_, hba_info); 3580 CONFIGFS_ATTR(target_, hba_mode); 3581 3582 static void target_core_hba_release(struct config_item *item) 3583 { 3584 struct se_hba *hba = container_of(to_config_group(item), 3585 struct se_hba, hba_group); 3586 core_delete_hba(hba); 3587 } 3588 3589 static struct configfs_attribute *target_core_hba_attrs[] = { 3590 &target_attr_hba_info, 3591 &target_attr_hba_mode, 3592 NULL, 3593 }; 3594 3595 static const struct configfs_item_operations target_core_hba_item_ops = { 3596 .release = target_core_hba_release, 3597 }; 3598 3599 static const struct config_item_type target_core_hba_cit = { 3600 .ct_item_ops = &target_core_hba_item_ops, 3601 .ct_group_ops = &target_core_hba_group_ops, 3602 .ct_attrs = target_core_hba_attrs, 3603 .ct_owner = THIS_MODULE, 3604 }; 3605 3606 static struct config_group *target_core_call_addhbatotarget( 3607 struct config_group *group, 3608 const char *name) 3609 { 3610 char *se_plugin_str, *str, *str2; 3611 struct se_hba *hba; 3612 char buf[TARGET_CORE_NAME_MAX_LEN] = { }; 3613 unsigned long plugin_dep_id = 0; 3614 int ret; 3615 3616 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 3617 pr_err("Passed *name strlen(): %d exceeds" 3618 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 3619 TARGET_CORE_NAME_MAX_LEN); 3620 return ERR_PTR(-ENAMETOOLONG); 3621 } 3622 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 3623 3624 str = strstr(buf, "_"); 3625 if (!str) { 3626 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 3627 return ERR_PTR(-EINVAL); 3628 } 3629 se_plugin_str = buf; 3630 /* 3631 * Special case for subsystem plugins that have "_" in their names. 3632 * Namely rd_direct and rd_mcp.. 3633 */ 3634 str2 = strstr(str+1, "_"); 3635 if (str2) { 3636 *str2 = '\0'; /* Terminate for *se_plugin_str */ 3637 str2++; /* Skip to start of plugin dependent ID */ 3638 str = str2; 3639 } else { 3640 *str = '\0'; /* Terminate for *se_plugin_str */ 3641 str++; /* Skip to start of plugin dependent ID */ 3642 } 3643 3644 ret = kstrtoul(str, 0, &plugin_dep_id); 3645 if (ret < 0) { 3646 pr_err("kstrtoul() returned %d for" 3647 " plugin_dep_id\n", ret); 3648 return ERR_PTR(ret); 3649 } 3650 /* 3651 * Load up TCM subsystem plugins if they have not already been loaded. 3652 */ 3653 transport_subsystem_check_init(); 3654 3655 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 3656 if (IS_ERR(hba)) 3657 return ERR_CAST(hba); 3658 3659 config_group_init_type_name(&hba->hba_group, name, 3660 &target_core_hba_cit); 3661 3662 return &hba->hba_group; 3663 } 3664 3665 static void target_core_call_delhbafromtarget( 3666 struct config_group *group, 3667 struct config_item *item) 3668 { 3669 /* 3670 * core_delete_hba() is called from target_core_hba_item_ops->release() 3671 * -> target_core_hba_release() 3672 */ 3673 config_item_put(item); 3674 } 3675 3676 static const struct configfs_group_operations target_core_group_ops = { 3677 .make_group = target_core_call_addhbatotarget, 3678 .drop_item = target_core_call_delhbafromtarget, 3679 }; 3680 3681 static const struct config_item_type target_core_cit = { 3682 .ct_item_ops = NULL, 3683 .ct_group_ops = &target_core_group_ops, 3684 .ct_attrs = NULL, 3685 .ct_owner = THIS_MODULE, 3686 }; 3687 3688 /* Stop functions for struct config_item_type target_core_hba_cit */ 3689 3690 void target_setup_backend_cits(struct target_backend *tb) 3691 { 3692 target_core_setup_dev_cit(tb); 3693 target_core_setup_dev_action_cit(tb); 3694 target_core_setup_dev_attrib_cit(tb); 3695 target_core_setup_dev_pr_cit(tb); 3696 target_core_setup_dev_wwn_cit(tb); 3697 target_core_setup_dev_alua_tg_pt_gps_cit(tb); 3698 target_core_setup_dev_stat_cit(tb); 3699 } 3700 3701 static void target_init_dbroot(void) 3702 { 3703 struct file *fp; 3704 3705 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED); 3706 fp = filp_open(db_root_stage, O_RDONLY, 0); 3707 if (IS_ERR(fp)) { 3708 pr_err("db_root: cannot open: %s\n", db_root_stage); 3709 return; 3710 } 3711 if (!S_ISDIR(file_inode(fp)->i_mode)) { 3712 filp_close(fp, NULL); 3713 pr_err("db_root: not a valid directory: %s\n", db_root_stage); 3714 return; 3715 } 3716 filp_close(fp, NULL); 3717 3718 strscpy(db_root, db_root_stage); 3719 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); 3720 } 3721 3722 static int __init target_core_init_configfs(void) 3723 { 3724 struct configfs_subsystem *subsys = &target_core_fabrics; 3725 struct t10_alua_lu_gp *lu_gp; 3726 int ret; 3727 3728 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 3729 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3730 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3731 3732 config_group_init(&subsys->su_group); 3733 mutex_init(&subsys->su_mutex); 3734 3735 ret = init_se_kmem_caches(); 3736 if (ret < 0) 3737 return ret; 3738 /* 3739 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3740 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3741 */ 3742 config_group_init_type_name(&target_core_hbagroup, "core", 3743 &target_core_cit); 3744 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group); 3745 3746 /* 3747 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3748 */ 3749 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit); 3750 configfs_add_default_group(&alua_group, &target_core_hbagroup); 3751 3752 /* 3753 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3754 * groups under /sys/kernel/config/target/core/alua/ 3755 */ 3756 config_group_init_type_name(&alua_lu_gps_group, "lu_gps", 3757 &target_core_alua_lu_gps_cit); 3758 configfs_add_default_group(&alua_lu_gps_group, &alua_group); 3759 3760 /* 3761 * Add core/alua/lu_gps/default_lu_gp 3762 */ 3763 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3764 if (IS_ERR(lu_gp)) { 3765 ret = -ENOMEM; 3766 goto out_global; 3767 } 3768 3769 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3770 &target_core_alua_lu_gp_cit); 3771 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group); 3772 3773 default_lu_gp = lu_gp; 3774 3775 /* 3776 * Register the target_core_mod subsystem with configfs. 3777 */ 3778 ret = configfs_register_subsystem(subsys); 3779 if (ret < 0) { 3780 pr_err("Error %d while registering subsystem %s\n", 3781 ret, subsys->su_group.cg_item.ci_namebuf); 3782 goto out_global; 3783 } 3784 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 3785 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s" 3786 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3787 /* 3788 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3789 */ 3790 ret = rd_module_init(); 3791 if (ret < 0) 3792 goto out; 3793 3794 ret = core_dev_setup_virtual_lun0(); 3795 if (ret < 0) 3796 goto out; 3797 3798 ret = target_xcopy_setup_pt(); 3799 if (ret < 0) 3800 goto out; 3801 3802 scoped_with_kernel_creds() 3803 target_init_dbroot(); 3804 3805 return 0; 3806 3807 out: 3808 target_xcopy_release_pt(); 3809 configfs_unregister_subsystem(subsys); 3810 core_dev_release_virtual_lun0(); 3811 rd_module_exit(); 3812 out_global: 3813 if (default_lu_gp) { 3814 core_alua_free_lu_gp(default_lu_gp); 3815 default_lu_gp = NULL; 3816 } 3817 release_se_kmem_caches(); 3818 return ret; 3819 } 3820 3821 static void __exit target_core_exit_configfs(void) 3822 { 3823 configfs_remove_default_groups(&alua_lu_gps_group); 3824 configfs_remove_default_groups(&alua_group); 3825 configfs_remove_default_groups(&target_core_hbagroup); 3826 3827 /* 3828 * We expect subsys->su_group.default_groups to be released 3829 * by configfs subsystem provider logic.. 3830 */ 3831 configfs_unregister_subsystem(&target_core_fabrics); 3832 3833 core_alua_free_lu_gp(default_lu_gp); 3834 default_lu_gp = NULL; 3835 3836 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3837 " Infrastructure\n"); 3838 3839 core_dev_release_virtual_lun0(); 3840 rd_module_exit(); 3841 target_xcopy_release_pt(); 3842 release_se_kmem_caches(); 3843 } 3844 3845 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3846 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3847 MODULE_LICENSE("GPL"); 3848 3849 module_init(target_core_init_configfs); 3850 module_exit(target_core_exit_configfs); 3851