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(complete_type); 579 DEF_CONFIGFS_ATTRIB_SHOW(atomic_max_len); 580 DEF_CONFIGFS_ATTRIB_SHOW(atomic_alignment); 581 DEF_CONFIGFS_ATTRIB_SHOW(atomic_granularity); 582 DEF_CONFIGFS_ATTRIB_SHOW(atomic_max_with_boundary); 583 DEF_CONFIGFS_ATTRIB_SHOW(atomic_max_boundary); 584 585 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \ 586 static ssize_t _name##_store(struct config_item *item, const char *page,\ 587 size_t count) \ 588 { \ 589 struct se_dev_attrib *da = to_attrib(item); \ 590 u32 val; \ 591 int ret; \ 592 \ 593 ret = kstrtou32(page, 0, &val); \ 594 if (ret < 0) \ 595 return ret; \ 596 da->_name = val; \ 597 return count; \ 598 } 599 600 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count); 601 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count); 602 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity); 603 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment); 604 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len); 605 606 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \ 607 static ssize_t _name##_store(struct config_item *item, const char *page, \ 608 size_t count) \ 609 { \ 610 struct se_dev_attrib *da = to_attrib(item); \ 611 bool flag; \ 612 int ret; \ 613 \ 614 ret = kstrtobool(page, &flag); \ 615 if (ret < 0) \ 616 return ret; \ 617 da->_name = flag; \ 618 return count; \ 619 } 620 621 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write); 622 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw); 623 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc); 624 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr); 625 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids); 626 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot); 627 628 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \ 629 static ssize_t _name##_store(struct config_item *item, const char *page,\ 630 size_t count) \ 631 { \ 632 printk_once(KERN_WARNING \ 633 "ignoring deprecated %s attribute\n", \ 634 __stringify(_name)); \ 635 return count; \ 636 } 637 638 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo); 639 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read); 640 641 static void dev_set_t10_wwn_model_alias(struct se_device *dev) 642 { 643 const char *configname; 644 645 configname = config_item_name(&dev->dev_group.cg_item); 646 if (strlen(configname) >= INQUIRY_MODEL_LEN) { 647 pr_warn("dev[%p]: Backstore name '%s' is too long for " 648 "INQUIRY_MODEL, truncating to 15 characters\n", dev, 649 configname); 650 } 651 /* 652 * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1) 653 * here without potentially breaking existing setups, so continue to 654 * truncate one byte shorter than what can be carried in INQUIRY. 655 */ 656 strscpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN); 657 } 658 659 static ssize_t emulate_model_alias_store(struct config_item *item, 660 const char *page, size_t count) 661 { 662 struct se_dev_attrib *da = to_attrib(item); 663 struct se_device *dev = da->da_dev; 664 bool flag; 665 int ret; 666 667 if (dev->export_count) { 668 pr_err("dev[%p]: Unable to change model alias" 669 " while export_count is %d\n", 670 dev, dev->export_count); 671 return -EINVAL; 672 } 673 674 ret = kstrtobool(page, &flag); 675 if (ret < 0) 676 return ret; 677 678 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); 679 if (flag) 680 dev_set_t10_wwn_model_alias(dev); 681 else 682 strscpy(dev->t10_wwn.model, dev->transport->inquiry_prod); 683 da->emulate_model_alias = flag; 684 return count; 685 } 686 687 static ssize_t emulate_write_cache_store(struct config_item *item, 688 const char *page, size_t count) 689 { 690 struct se_dev_attrib *da = to_attrib(item); 691 bool flag; 692 int ret; 693 694 ret = kstrtobool(page, &flag); 695 if (ret < 0) 696 return ret; 697 698 if (flag && da->da_dev->transport->get_write_cache) { 699 pr_err("emulate_write_cache not supported for this device\n"); 700 return -EINVAL; 701 } 702 703 da->emulate_write_cache = flag; 704 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 705 da->da_dev, flag); 706 return count; 707 } 708 709 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item, 710 const char *page, size_t count) 711 { 712 struct se_dev_attrib *da = to_attrib(item); 713 u32 val; 714 int ret; 715 716 ret = kstrtou32(page, 0, &val); 717 if (ret < 0) 718 return ret; 719 720 if (val != TARGET_UA_INTLCK_CTRL_CLEAR 721 && val != TARGET_UA_INTLCK_CTRL_NO_CLEAR 722 && val != TARGET_UA_INTLCK_CTRL_ESTABLISH_UA) { 723 pr_err("Illegal value %d\n", val); 724 return -EINVAL; 725 } 726 727 if (da->da_dev->export_count) { 728 pr_err("dev[%p]: Unable to change SE Device" 729 " UA_INTRLCK_CTRL while export_count is %d\n", 730 da->da_dev, da->da_dev->export_count); 731 return -EINVAL; 732 } 733 da->emulate_ua_intlck_ctrl = val; 734 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 735 da->da_dev, val); 736 return count; 737 } 738 739 static ssize_t emulate_tas_store(struct config_item *item, 740 const char *page, size_t count) 741 { 742 struct se_dev_attrib *da = to_attrib(item); 743 bool flag; 744 int ret; 745 746 ret = kstrtobool(page, &flag); 747 if (ret < 0) 748 return ret; 749 750 if (da->da_dev->export_count) { 751 pr_err("dev[%p]: Unable to change SE Device TAS while" 752 " export_count is %d\n", 753 da->da_dev, da->da_dev->export_count); 754 return -EINVAL; 755 } 756 da->emulate_tas = flag; 757 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 758 da->da_dev, flag ? "Enabled" : "Disabled"); 759 760 return count; 761 } 762 763 static int target_try_configure_unmap(struct se_device *dev, 764 const char *config_opt) 765 { 766 if (!dev->transport->configure_unmap) { 767 pr_err("Generic Block Discard not supported\n"); 768 return -ENOSYS; 769 } 770 771 if (!target_dev_configured(dev)) { 772 pr_err("Generic Block Discard setup for %s requires device to be configured\n", 773 config_opt); 774 return -ENODEV; 775 } 776 777 if (!dev->transport->configure_unmap(dev)) { 778 pr_err("Generic Block Discard setup for %s failed\n", 779 config_opt); 780 return -ENOSYS; 781 } 782 783 return 0; 784 } 785 786 static ssize_t emulate_tpu_store(struct config_item *item, 787 const char *page, size_t count) 788 { 789 struct se_dev_attrib *da = to_attrib(item); 790 struct se_device *dev = da->da_dev; 791 bool flag; 792 int ret; 793 794 ret = kstrtobool(page, &flag); 795 if (ret < 0) 796 return ret; 797 798 /* 799 * We expect this value to be non-zero when generic Block Layer 800 * Discard supported is detected iblock_create_virtdevice(). 801 */ 802 if (flag && !da->max_unmap_block_desc_count) { 803 ret = target_try_configure_unmap(dev, "emulate_tpu"); 804 if (ret) 805 return ret; 806 } 807 808 da->emulate_tpu = flag; 809 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 810 da->da_dev, flag); 811 return count; 812 } 813 814 static ssize_t emulate_tpws_store(struct config_item *item, 815 const char *page, size_t count) 816 { 817 struct se_dev_attrib *da = to_attrib(item); 818 struct se_device *dev = da->da_dev; 819 bool flag; 820 int ret; 821 822 ret = kstrtobool(page, &flag); 823 if (ret < 0) 824 return ret; 825 826 /* 827 * We expect this value to be non-zero when generic Block Layer 828 * Discard supported is detected iblock_create_virtdevice(). 829 */ 830 if (flag && !da->max_unmap_block_desc_count) { 831 ret = target_try_configure_unmap(dev, "emulate_tpws"); 832 if (ret) 833 return ret; 834 } 835 836 da->emulate_tpws = flag; 837 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 838 da->da_dev, flag); 839 return count; 840 } 841 842 static ssize_t pi_prot_type_store(struct config_item *item, 843 const char *page, size_t count) 844 { 845 struct se_dev_attrib *da = to_attrib(item); 846 int old_prot = da->pi_prot_type, ret; 847 struct se_device *dev = da->da_dev; 848 u32 flag; 849 850 ret = kstrtou32(page, 0, &flag); 851 if (ret < 0) 852 return ret; 853 854 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) { 855 pr_err("Illegal value %d for pi_prot_type\n", flag); 856 return -EINVAL; 857 } 858 if (flag == 2) { 859 pr_err("DIF TYPE2 protection currently not supported\n"); 860 return -ENOSYS; 861 } 862 if (da->hw_pi_prot_type) { 863 pr_warn("DIF protection enabled on underlying hardware," 864 " ignoring\n"); 865 return count; 866 } 867 if (!dev->transport->init_prot || !dev->transport->free_prot) { 868 /* 0 is only allowed value for non-supporting backends */ 869 if (flag == 0) 870 return count; 871 872 pr_err("DIF protection not supported by backend: %s\n", 873 dev->transport->name); 874 return -ENOSYS; 875 } 876 if (!target_dev_configured(dev)) { 877 pr_err("DIF protection requires device to be configured\n"); 878 return -ENODEV; 879 } 880 if (dev->export_count) { 881 pr_err("dev[%p]: Unable to change SE Device PROT type while" 882 " export_count is %d\n", dev, dev->export_count); 883 return -EINVAL; 884 } 885 886 da->pi_prot_type = flag; 887 888 if (flag && !old_prot) { 889 ret = dev->transport->init_prot(dev); 890 if (ret) { 891 da->pi_prot_type = old_prot; 892 da->pi_prot_verify = (bool) da->pi_prot_type; 893 return ret; 894 } 895 896 } else if (!flag && old_prot) { 897 dev->transport->free_prot(dev); 898 } 899 900 da->pi_prot_verify = (bool) da->pi_prot_type; 901 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag); 902 return count; 903 } 904 905 /* always zero, but attr needs to remain RW to avoid userspace breakage */ 906 static ssize_t pi_prot_format_show(struct config_item *item, char *page) 907 { 908 return snprintf(page, PAGE_SIZE, "0\n"); 909 } 910 911 static ssize_t pi_prot_format_store(struct config_item *item, 912 const char *page, size_t count) 913 { 914 struct se_dev_attrib *da = to_attrib(item); 915 struct se_device *dev = da->da_dev; 916 bool flag; 917 int ret; 918 919 ret = kstrtobool(page, &flag); 920 if (ret < 0) 921 return ret; 922 923 if (!flag) 924 return count; 925 926 if (!dev->transport->format_prot) { 927 pr_err("DIF protection format not supported by backend %s\n", 928 dev->transport->name); 929 return -ENOSYS; 930 } 931 if (!target_dev_configured(dev)) { 932 pr_err("DIF protection format requires device to be configured\n"); 933 return -ENODEV; 934 } 935 if (dev->export_count) { 936 pr_err("dev[%p]: Unable to format SE Device PROT type while" 937 " export_count is %d\n", dev, dev->export_count); 938 return -EINVAL; 939 } 940 941 ret = dev->transport->format_prot(dev); 942 if (ret) 943 return ret; 944 945 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev); 946 return count; 947 } 948 949 static ssize_t pi_prot_verify_store(struct config_item *item, 950 const char *page, size_t count) 951 { 952 struct se_dev_attrib *da = to_attrib(item); 953 bool flag; 954 int ret; 955 956 ret = kstrtobool(page, &flag); 957 if (ret < 0) 958 return ret; 959 960 if (!flag) { 961 da->pi_prot_verify = flag; 962 return count; 963 } 964 if (da->hw_pi_prot_type) { 965 pr_warn("DIF protection enabled on underlying hardware," 966 " ignoring\n"); 967 return count; 968 } 969 if (!da->pi_prot_type) { 970 pr_warn("DIF protection not supported by backend, ignoring\n"); 971 return count; 972 } 973 da->pi_prot_verify = flag; 974 975 return count; 976 } 977 978 static ssize_t force_pr_aptpl_store(struct config_item *item, 979 const char *page, size_t count) 980 { 981 struct se_dev_attrib *da = to_attrib(item); 982 bool flag; 983 int ret; 984 985 ret = kstrtobool(page, &flag); 986 if (ret < 0) 987 return ret; 988 if (da->da_dev->export_count) { 989 pr_err("dev[%p]: Unable to set force_pr_aptpl while" 990 " export_count is %d\n", 991 da->da_dev, da->da_dev->export_count); 992 return -EINVAL; 993 } 994 995 da->force_pr_aptpl = flag; 996 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag); 997 return count; 998 } 999 1000 static ssize_t emulate_rest_reord_store(struct config_item *item, 1001 const char *page, size_t count) 1002 { 1003 struct se_dev_attrib *da = to_attrib(item); 1004 bool flag; 1005 int ret; 1006 1007 ret = kstrtobool(page, &flag); 1008 if (ret < 0) 1009 return ret; 1010 1011 if (flag != 0) { 1012 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted" 1013 " reordering not implemented\n", da->da_dev); 1014 return -ENOSYS; 1015 } 1016 da->emulate_rest_reord = flag; 1017 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", 1018 da->da_dev, flag); 1019 return count; 1020 } 1021 1022 static ssize_t unmap_zeroes_data_store(struct config_item *item, 1023 const char *page, size_t count) 1024 { 1025 struct se_dev_attrib *da = to_attrib(item); 1026 struct se_device *dev = da->da_dev; 1027 bool flag; 1028 int ret; 1029 1030 ret = kstrtobool(page, &flag); 1031 if (ret < 0) 1032 return ret; 1033 1034 if (da->da_dev->export_count) { 1035 pr_err("dev[%p]: Unable to change SE Device" 1036 " unmap_zeroes_data while export_count is %d\n", 1037 da->da_dev, da->da_dev->export_count); 1038 return -EINVAL; 1039 } 1040 /* 1041 * We expect this value to be non-zero when generic Block Layer 1042 * Discard supported is detected iblock_configure_device(). 1043 */ 1044 if (flag && !da->max_unmap_block_desc_count) { 1045 ret = target_try_configure_unmap(dev, "unmap_zeroes_data"); 1046 if (ret) 1047 return ret; 1048 } 1049 da->unmap_zeroes_data = flag; 1050 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n", 1051 da->da_dev, flag); 1052 return count; 1053 } 1054 1055 /* 1056 * Note, this can only be called on unexported SE Device Object. 1057 */ 1058 static ssize_t queue_depth_store(struct config_item *item, 1059 const char *page, size_t count) 1060 { 1061 struct se_dev_attrib *da = to_attrib(item); 1062 struct se_device *dev = da->da_dev; 1063 u32 val; 1064 int ret; 1065 1066 ret = kstrtou32(page, 0, &val); 1067 if (ret < 0) 1068 return ret; 1069 1070 if (dev->export_count) { 1071 pr_err("dev[%p]: Unable to change SE Device TCQ while" 1072 " export_count is %d\n", 1073 dev, dev->export_count); 1074 return -EINVAL; 1075 } 1076 if (!val) { 1077 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev); 1078 return -EINVAL; 1079 } 1080 1081 if (val > dev->dev_attrib.queue_depth) { 1082 if (val > dev->dev_attrib.hw_queue_depth) { 1083 pr_err("dev[%p]: Passed queue_depth:" 1084 " %u exceeds TCM/SE_Device MAX" 1085 " TCQ: %u\n", dev, val, 1086 dev->dev_attrib.hw_queue_depth); 1087 return -EINVAL; 1088 } 1089 } 1090 da->queue_depth = dev->queue_depth = val; 1091 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val); 1092 return count; 1093 } 1094 1095 static ssize_t optimal_sectors_store(struct config_item *item, 1096 const char *page, size_t count) 1097 { 1098 struct se_dev_attrib *da = to_attrib(item); 1099 u32 val; 1100 int ret; 1101 1102 ret = kstrtou32(page, 0, &val); 1103 if (ret < 0) 1104 return ret; 1105 1106 if (da->da_dev->export_count) { 1107 pr_err("dev[%p]: Unable to change SE Device" 1108 " optimal_sectors while export_count is %d\n", 1109 da->da_dev, da->da_dev->export_count); 1110 return -EINVAL; 1111 } 1112 if (val > da->hw_max_sectors) { 1113 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1114 " greater than hw_max_sectors: %u\n", 1115 da->da_dev, val, da->hw_max_sectors); 1116 return -EINVAL; 1117 } 1118 1119 da->optimal_sectors = val; 1120 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1121 da->da_dev, val); 1122 return count; 1123 } 1124 1125 static ssize_t block_size_store(struct config_item *item, 1126 const char *page, size_t count) 1127 { 1128 struct se_dev_attrib *da = to_attrib(item); 1129 u32 val; 1130 int ret; 1131 1132 ret = kstrtou32(page, 0, &val); 1133 if (ret < 0) 1134 return ret; 1135 1136 if (da->da_dev->export_count) { 1137 pr_err("dev[%p]: Unable to change SE Device block_size" 1138 " while export_count is %d\n", 1139 da->da_dev, da->da_dev->export_count); 1140 return -EINVAL; 1141 } 1142 1143 if (val != 512 && val != 1024 && val != 2048 && val != 4096) { 1144 pr_err("dev[%p]: Illegal value for block_device: %u" 1145 " for SE device, must be 512, 1024, 2048 or 4096\n", 1146 da->da_dev, val); 1147 return -EINVAL; 1148 } 1149 1150 da->block_size = val; 1151 1152 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1153 da->da_dev, val); 1154 return count; 1155 } 1156 1157 static ssize_t alua_support_show(struct config_item *item, char *page) 1158 { 1159 struct se_dev_attrib *da = to_attrib(item); 1160 u8 flags = da->da_dev->transport_flags; 1161 1162 return snprintf(page, PAGE_SIZE, "%d\n", 1163 flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1); 1164 } 1165 1166 static ssize_t alua_support_store(struct config_item *item, 1167 const char *page, size_t count) 1168 { 1169 struct se_dev_attrib *da = to_attrib(item); 1170 struct se_device *dev = da->da_dev; 1171 bool flag, oldflag; 1172 int ret; 1173 1174 ret = kstrtobool(page, &flag); 1175 if (ret < 0) 1176 return ret; 1177 1178 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA); 1179 if (flag == oldflag) 1180 return count; 1181 1182 if (!(dev->transport->transport_flags_changeable & 1183 TRANSPORT_FLAG_PASSTHROUGH_ALUA)) { 1184 pr_err("dev[%p]: Unable to change SE Device alua_support:" 1185 " alua_support has fixed value\n", dev); 1186 return -ENOSYS; 1187 } 1188 1189 if (flag) 1190 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_ALUA; 1191 else 1192 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_ALUA; 1193 return count; 1194 } 1195 1196 static ssize_t pgr_support_show(struct config_item *item, char *page) 1197 { 1198 struct se_dev_attrib *da = to_attrib(item); 1199 u8 flags = da->da_dev->transport_flags; 1200 1201 return snprintf(page, PAGE_SIZE, "%d\n", 1202 flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1); 1203 } 1204 1205 static ssize_t pgr_support_store(struct config_item *item, 1206 const char *page, size_t count) 1207 { 1208 struct se_dev_attrib *da = to_attrib(item); 1209 struct se_device *dev = da->da_dev; 1210 bool flag, oldflag; 1211 int ret; 1212 1213 ret = kstrtobool(page, &flag); 1214 if (ret < 0) 1215 return ret; 1216 1217 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR); 1218 if (flag == oldflag) 1219 return count; 1220 1221 if (!(dev->transport->transport_flags_changeable & 1222 TRANSPORT_FLAG_PASSTHROUGH_PGR)) { 1223 pr_err("dev[%p]: Unable to change SE Device pgr_support:" 1224 " pgr_support has fixed value\n", dev); 1225 return -ENOSYS; 1226 } 1227 1228 if (flag) 1229 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_PGR; 1230 else 1231 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_PGR; 1232 return count; 1233 } 1234 1235 static ssize_t emulate_rsoc_store(struct config_item *item, 1236 const char *page, size_t count) 1237 { 1238 struct se_dev_attrib *da = to_attrib(item); 1239 bool flag; 1240 int ret; 1241 1242 ret = kstrtobool(page, &flag); 1243 if (ret < 0) 1244 return ret; 1245 1246 da->emulate_rsoc = flag; 1247 pr_debug("dev[%p]: SE Device REPORT_SUPPORTED_OPERATION_CODES_EMULATION flag: %d\n", 1248 da->da_dev, flag); 1249 return count; 1250 } 1251 1252 static ssize_t submit_type_store(struct config_item *item, const char *page, 1253 size_t count) 1254 { 1255 struct se_dev_attrib *da = to_attrib(item); 1256 int ret; 1257 u8 val; 1258 1259 ret = kstrtou8(page, 0, &val); 1260 if (ret < 0) 1261 return ret; 1262 1263 if (val > TARGET_QUEUE_SUBMIT) 1264 return -EINVAL; 1265 1266 da->submit_type = val; 1267 return count; 1268 } 1269 1270 static ssize_t complete_type_store(struct config_item *item, const char *page, 1271 size_t count) 1272 { 1273 struct se_dev_attrib *da = to_attrib(item); 1274 int ret; 1275 u8 val; 1276 1277 ret = kstrtou8(page, 0, &val); 1278 if (ret < 0) 1279 return ret; 1280 1281 if (val > TARGET_QUEUE_COMPL) 1282 return -EINVAL; 1283 1284 da->complete_type = val; 1285 return count; 1286 } 1287 1288 CONFIGFS_ATTR(, emulate_model_alias); 1289 CONFIGFS_ATTR(, emulate_dpo); 1290 CONFIGFS_ATTR(, emulate_fua_write); 1291 CONFIGFS_ATTR(, emulate_fua_read); 1292 CONFIGFS_ATTR(, emulate_write_cache); 1293 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl); 1294 CONFIGFS_ATTR(, emulate_tas); 1295 CONFIGFS_ATTR(, emulate_tpu); 1296 CONFIGFS_ATTR(, emulate_tpws); 1297 CONFIGFS_ATTR(, emulate_caw); 1298 CONFIGFS_ATTR(, emulate_3pc); 1299 CONFIGFS_ATTR(, emulate_pr); 1300 CONFIGFS_ATTR(, emulate_rsoc); 1301 CONFIGFS_ATTR(, pi_prot_type); 1302 CONFIGFS_ATTR_RO(, hw_pi_prot_type); 1303 CONFIGFS_ATTR(, pi_prot_format); 1304 CONFIGFS_ATTR(, pi_prot_verify); 1305 CONFIGFS_ATTR(, enforce_pr_isids); 1306 CONFIGFS_ATTR(, is_nonrot); 1307 CONFIGFS_ATTR(, emulate_rest_reord); 1308 CONFIGFS_ATTR(, force_pr_aptpl); 1309 CONFIGFS_ATTR_RO(, hw_block_size); 1310 CONFIGFS_ATTR(, block_size); 1311 CONFIGFS_ATTR_RO(, hw_max_sectors); 1312 CONFIGFS_ATTR(, optimal_sectors); 1313 CONFIGFS_ATTR_RO(, hw_queue_depth); 1314 CONFIGFS_ATTR(, queue_depth); 1315 CONFIGFS_ATTR(, max_unmap_lba_count); 1316 CONFIGFS_ATTR(, max_unmap_block_desc_count); 1317 CONFIGFS_ATTR(, unmap_granularity); 1318 CONFIGFS_ATTR(, unmap_granularity_alignment); 1319 CONFIGFS_ATTR(, unmap_zeroes_data); 1320 CONFIGFS_ATTR(, max_write_same_len); 1321 CONFIGFS_ATTR(, alua_support); 1322 CONFIGFS_ATTR(, pgr_support); 1323 CONFIGFS_ATTR(, submit_type); 1324 CONFIGFS_ATTR(, complete_type); 1325 CONFIGFS_ATTR_RO(, atomic_max_len); 1326 CONFIGFS_ATTR_RO(, atomic_alignment); 1327 CONFIGFS_ATTR_RO(, atomic_granularity); 1328 CONFIGFS_ATTR_RO(, atomic_max_with_boundary); 1329 CONFIGFS_ATTR_RO(, atomic_max_boundary); 1330 1331 /* 1332 * dev_attrib attributes for devices using the target core SBC/SPC 1333 * interpreter. Any backend using spc_parse_cdb should be using 1334 * these. 1335 */ 1336 struct configfs_attribute *sbc_attrib_attrs[] = { 1337 &attr_emulate_model_alias, 1338 &attr_emulate_dpo, 1339 &attr_emulate_fua_write, 1340 &attr_emulate_fua_read, 1341 &attr_emulate_write_cache, 1342 &attr_emulate_ua_intlck_ctrl, 1343 &attr_emulate_tas, 1344 &attr_emulate_tpu, 1345 &attr_emulate_tpws, 1346 &attr_emulate_caw, 1347 &attr_emulate_3pc, 1348 &attr_emulate_pr, 1349 &attr_pi_prot_type, 1350 &attr_hw_pi_prot_type, 1351 &attr_pi_prot_format, 1352 &attr_pi_prot_verify, 1353 &attr_enforce_pr_isids, 1354 &attr_is_nonrot, 1355 &attr_emulate_rest_reord, 1356 &attr_force_pr_aptpl, 1357 &attr_hw_block_size, 1358 &attr_block_size, 1359 &attr_hw_max_sectors, 1360 &attr_optimal_sectors, 1361 &attr_hw_queue_depth, 1362 &attr_queue_depth, 1363 &attr_max_unmap_lba_count, 1364 &attr_max_unmap_block_desc_count, 1365 &attr_unmap_granularity, 1366 &attr_unmap_granularity_alignment, 1367 &attr_unmap_zeroes_data, 1368 &attr_max_write_same_len, 1369 &attr_alua_support, 1370 &attr_pgr_support, 1371 &attr_emulate_rsoc, 1372 &attr_submit_type, 1373 &attr_complete_type, 1374 &attr_atomic_alignment, 1375 &attr_atomic_max_len, 1376 &attr_atomic_granularity, 1377 &attr_atomic_max_with_boundary, 1378 &attr_atomic_max_boundary, 1379 NULL, 1380 }; 1381 EXPORT_SYMBOL(sbc_attrib_attrs); 1382 1383 /* 1384 * Minimal dev_attrib attributes for devices passing through CDBs. 1385 * In this case we only provide a few read-only attributes for 1386 * backwards compatibility. 1387 */ 1388 struct configfs_attribute *passthrough_attrib_attrs[] = { 1389 &attr_hw_pi_prot_type, 1390 &attr_hw_block_size, 1391 &attr_hw_max_sectors, 1392 &attr_hw_queue_depth, 1393 &attr_emulate_pr, 1394 &attr_alua_support, 1395 &attr_pgr_support, 1396 &attr_submit_type, 1397 &attr_complete_type, 1398 NULL, 1399 }; 1400 EXPORT_SYMBOL(passthrough_attrib_attrs); 1401 1402 /* 1403 * pr related dev_attrib attributes for devices passing through CDBs, 1404 * but allowing in core pr emulation. 1405 */ 1406 struct configfs_attribute *passthrough_pr_attrib_attrs[] = { 1407 &attr_enforce_pr_isids, 1408 &attr_force_pr_aptpl, 1409 NULL, 1410 }; 1411 EXPORT_SYMBOL(passthrough_pr_attrib_attrs); 1412 1413 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL); 1414 TB_CIT_SETUP_DRV(dev_action, NULL, NULL); 1415 1416 /* End functions for struct config_item_type tb_dev_attrib_cit */ 1417 1418 /* Start functions for struct config_item_type tb_dev_wwn_cit */ 1419 1420 static struct t10_wwn *to_t10_wwn(struct config_item *item) 1421 { 1422 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group); 1423 } 1424 1425 static ssize_t target_check_inquiry_data(char *buf) 1426 { 1427 size_t len; 1428 int i; 1429 1430 len = strlen(buf); 1431 1432 /* 1433 * SPC 4.3.1: 1434 * ASCII data fields shall contain only ASCII printable characters 1435 * (i.e., code values 20h to 7Eh) and may be terminated with one or 1436 * more ASCII null (00h) characters. 1437 */ 1438 for (i = 0; i < len; i++) { 1439 if (buf[i] < 0x20 || buf[i] > 0x7E) { 1440 pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n"); 1441 return -EINVAL; 1442 } 1443 } 1444 1445 return len; 1446 } 1447 1448 /* 1449 * STANDARD and VPD page 0x83 T10 Vendor Identification 1450 */ 1451 static ssize_t target_wwn_vendor_id_show(struct config_item *item, 1452 char *page) 1453 { 1454 return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]); 1455 } 1456 1457 static ssize_t target_wwn_vendor_id_store(struct config_item *item, 1458 const char *page, size_t count) 1459 { 1460 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1461 struct se_device *dev = t10_wwn->t10_dev; 1462 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1463 unsigned char buf[INQUIRY_VENDOR_LEN + 2]; 1464 char *stripped = NULL; 1465 ssize_t len; 1466 ssize_t ret; 1467 1468 len = strscpy(buf, page); 1469 if (len > 0) { 1470 /* Strip any newline added from userspace. */ 1471 stripped = strstrip(buf); 1472 len = strlen(stripped); 1473 } 1474 if (len < 0 || len > INQUIRY_VENDOR_LEN) { 1475 pr_err("Emulated T10 Vendor Identification exceeds" 1476 " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN) 1477 "\n"); 1478 return -EOVERFLOW; 1479 } 1480 1481 ret = target_check_inquiry_data(stripped); 1482 1483 if (ret < 0) 1484 return ret; 1485 1486 /* 1487 * Check to see if any active exports exist. If they do exist, fail 1488 * here as changing this information on the fly (underneath the 1489 * initiator side OS dependent multipath code) could cause negative 1490 * effects. 1491 */ 1492 if (dev->export_count) { 1493 pr_err("Unable to set T10 Vendor Identification while" 1494 " active %d exports exist\n", dev->export_count); 1495 return -EINVAL; 1496 } 1497 1498 BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1); 1499 strscpy(dev->t10_wwn.vendor, stripped); 1500 1501 pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:" 1502 " %s\n", dev->t10_wwn.vendor); 1503 1504 return count; 1505 } 1506 1507 static ssize_t target_wwn_product_id_show(struct config_item *item, 1508 char *page) 1509 { 1510 return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]); 1511 } 1512 1513 static ssize_t target_wwn_product_id_store(struct config_item *item, 1514 const char *page, size_t count) 1515 { 1516 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1517 struct se_device *dev = t10_wwn->t10_dev; 1518 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1519 unsigned char buf[INQUIRY_MODEL_LEN + 2]; 1520 char *stripped = NULL; 1521 ssize_t len; 1522 ssize_t ret; 1523 1524 len = strscpy(buf, page); 1525 if (len > 0) { 1526 /* Strip any newline added from userspace. */ 1527 stripped = strstrip(buf); 1528 len = strlen(stripped); 1529 } 1530 if (len < 0 || len > INQUIRY_MODEL_LEN) { 1531 pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: " 1532 __stringify(INQUIRY_MODEL_LEN) 1533 "\n"); 1534 return -EOVERFLOW; 1535 } 1536 1537 ret = target_check_inquiry_data(stripped); 1538 1539 if (ret < 0) 1540 return ret; 1541 1542 /* 1543 * Check to see if any active exports exist. If they do exist, fail 1544 * here as changing this information on the fly (underneath the 1545 * initiator side OS dependent multipath code) could cause negative 1546 * effects. 1547 */ 1548 if (dev->export_count) { 1549 pr_err("Unable to set T10 Model while active %d exports exist\n", 1550 dev->export_count); 1551 return -EINVAL; 1552 } 1553 1554 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); 1555 strscpy(dev->t10_wwn.model, stripped); 1556 1557 pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n", 1558 dev->t10_wwn.model); 1559 1560 return count; 1561 } 1562 1563 static ssize_t target_wwn_revision_show(struct config_item *item, 1564 char *page) 1565 { 1566 return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]); 1567 } 1568 1569 static ssize_t target_wwn_revision_store(struct config_item *item, 1570 const char *page, size_t count) 1571 { 1572 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1573 struct se_device *dev = t10_wwn->t10_dev; 1574 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1575 unsigned char buf[INQUIRY_REVISION_LEN + 2]; 1576 char *stripped = NULL; 1577 ssize_t len; 1578 ssize_t ret; 1579 1580 len = strscpy(buf, page); 1581 if (len > 0) { 1582 /* Strip any newline added from userspace. */ 1583 stripped = strstrip(buf); 1584 len = strlen(stripped); 1585 } 1586 if (len < 0 || len > INQUIRY_REVISION_LEN) { 1587 pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: " 1588 __stringify(INQUIRY_REVISION_LEN) 1589 "\n"); 1590 return -EOVERFLOW; 1591 } 1592 1593 ret = target_check_inquiry_data(stripped); 1594 1595 if (ret < 0) 1596 return ret; 1597 1598 /* 1599 * Check to see if any active exports exist. If they do exist, fail 1600 * here as changing this information on the fly (underneath the 1601 * initiator side OS dependent multipath code) could cause negative 1602 * effects. 1603 */ 1604 if (dev->export_count) { 1605 pr_err("Unable to set T10 Revision while active %d exports exist\n", 1606 dev->export_count); 1607 return -EINVAL; 1608 } 1609 1610 BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1); 1611 strscpy(dev->t10_wwn.revision, stripped); 1612 1613 pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n", 1614 dev->t10_wwn.revision); 1615 1616 return count; 1617 } 1618 1619 static ssize_t 1620 target_wwn_company_id_show(struct config_item *item, 1621 char *page) 1622 { 1623 return snprintf(page, PAGE_SIZE, "%#08x\n", 1624 to_t10_wwn(item)->company_id); 1625 } 1626 1627 static ssize_t 1628 target_wwn_company_id_store(struct config_item *item, 1629 const char *page, size_t count) 1630 { 1631 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1632 struct se_device *dev = t10_wwn->t10_dev; 1633 u32 val; 1634 int ret; 1635 1636 /* 1637 * The IEEE COMPANY_ID field should contain a 24-bit canonical 1638 * form OUI assigned by the IEEE. 1639 */ 1640 ret = kstrtou32(page, 0, &val); 1641 if (ret < 0) 1642 return ret; 1643 1644 if (val >= 0x1000000) 1645 return -EOVERFLOW; 1646 1647 /* 1648 * Check to see if any active exports exist. If they do exist, fail 1649 * here as changing this information on the fly (underneath the 1650 * initiator side OS dependent multipath code) could cause negative 1651 * effects. 1652 */ 1653 if (dev->export_count) { 1654 pr_err("Unable to set Company ID while %u exports exist\n", 1655 dev->export_count); 1656 return -EINVAL; 1657 } 1658 1659 t10_wwn->company_id = val; 1660 1661 pr_debug("Target_Core_ConfigFS: Set IEEE Company ID: %#08x\n", 1662 t10_wwn->company_id); 1663 1664 return count; 1665 } 1666 1667 /* 1668 * VPD page 0x80 Unit serial 1669 */ 1670 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item, 1671 char *page) 1672 { 1673 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 1674 &to_t10_wwn(item)->unit_serial[0]); 1675 } 1676 1677 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item, 1678 const char *page, size_t count) 1679 { 1680 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1681 struct se_device *dev = t10_wwn->t10_dev; 1682 unsigned char buf[INQUIRY_VPD_SERIAL_LEN] = { }; 1683 1684 /* 1685 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 1686 * from the struct scsi_device level firmware, do not allow 1687 * VPD Unit Serial to be emulated. 1688 * 1689 * Note this struct scsi_device could also be emulating VPD 1690 * information from its drivers/scsi LLD. But for now we assume 1691 * it is doing 'the right thing' wrt a world wide unique 1692 * VPD Unit Serial Number that OS dependent multipath can depend on. 1693 */ 1694 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) { 1695 pr_err("Underlying SCSI device firmware provided VPD" 1696 " Unit Serial, ignoring request\n"); 1697 return -EOPNOTSUPP; 1698 } 1699 1700 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 1701 pr_err("Emulated VPD Unit Serial exceeds" 1702 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 1703 return -EOVERFLOW; 1704 } 1705 /* 1706 * Check to see if any active $FABRIC_MOD exports exist. If they 1707 * do exist, fail here as changing this information on the fly 1708 * (underneath the initiator side OS dependent multipath code) 1709 * could cause negative effects. 1710 */ 1711 if (dev->export_count) { 1712 pr_err("Unable to set VPD Unit Serial while" 1713 " active %d $FABRIC_MOD exports exist\n", 1714 dev->export_count); 1715 return -EINVAL; 1716 } 1717 1718 /* 1719 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 1720 * 1721 * Also, strip any newline added from the userspace 1722 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 1723 */ 1724 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 1725 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 1726 "%s", strstrip(buf)); 1727 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL; 1728 1729 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 1730 " %s\n", dev->t10_wwn.unit_serial); 1731 1732 return count; 1733 } 1734 1735 /* 1736 * VPD page 0x83 Protocol Identifier 1737 */ 1738 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item, 1739 char *page) 1740 { 1741 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1742 struct t10_vpd *vpd; 1743 unsigned char buf[VPD_TMP_BUF_SIZE] = { }; 1744 ssize_t len = 0; 1745 1746 spin_lock(&t10_wwn->t10_vpd_lock); 1747 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 1748 if (!vpd->protocol_identifier_set) 1749 continue; 1750 1751 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 1752 1753 if (len + strlen(buf) >= PAGE_SIZE) 1754 break; 1755 1756 len += sprintf(page+len, "%s", buf); 1757 } 1758 spin_unlock(&t10_wwn->t10_vpd_lock); 1759 1760 return len; 1761 } 1762 1763 static ssize_t target_wwn_pd_text_id_info_show(struct config_item *item, 1764 char *page) 1765 { 1766 return sysfs_emit(page, "%s\n", &to_t10_wwn(item)->pd_text_id_info[0]); 1767 } 1768 1769 static ssize_t target_wwn_pd_text_id_info_store(struct config_item *item, 1770 const char *page, size_t count) 1771 { 1772 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1773 struct se_device *dev = t10_wwn->t10_dev; 1774 1775 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1776 unsigned char buf[PD_TEXT_ID_INFO_LEN + 2]; 1777 char *stripped; 1778 1779 /* 1780 * Check to see if any active exports exist. If they do exist, fail 1781 * here as changing this information on the fly (underneath the 1782 * initiator side OS dependent multipath code) could cause negative 1783 * effects. 1784 */ 1785 if (dev->export_count) { 1786 pr_err("Unable to set the peripheral device text id info while active %d exports exist\n", 1787 dev->export_count); 1788 return -EINVAL; 1789 } 1790 1791 if (strscpy(buf, page, sizeof(buf)) < 0) 1792 return -EOVERFLOW; 1793 1794 /* Strip any newline added from userspace. */ 1795 stripped = strstrip(buf); 1796 if (strlen(stripped) >= PD_TEXT_ID_INFO_LEN) { 1797 pr_err("Emulated peripheral device text id info exceeds PD_TEXT_ID_INFO_LEN: " __stringify(PD_TEXT_ID_INFO_LEN "\n")); 1798 return -EOVERFLOW; 1799 } 1800 1801 BUILD_BUG_ON(sizeof(dev->t10_wwn.pd_text_id_info) != PD_TEXT_ID_INFO_LEN); 1802 strscpy(dev->t10_wwn.pd_text_id_info, stripped, 1803 sizeof(dev->t10_wwn.pd_text_id_info)); 1804 1805 pr_debug("Target_Core_ConfigFS: Set emulated peripheral dev text id info:" 1806 " %s\n", dev->t10_wwn.pd_text_id_info); 1807 1808 return count; 1809 } 1810 1811 /* 1812 * Generic wrapper for dumping VPD identifiers by association. 1813 */ 1814 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 1815 static ssize_t target_wwn_##_name##_show(struct config_item *item, \ 1816 char *page) \ 1817 { \ 1818 struct t10_wwn *t10_wwn = to_t10_wwn(item); \ 1819 struct t10_vpd *vpd; \ 1820 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 1821 ssize_t len = 0; \ 1822 \ 1823 spin_lock(&t10_wwn->t10_vpd_lock); \ 1824 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 1825 if (vpd->association != _assoc) \ 1826 continue; \ 1827 \ 1828 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1829 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 1830 if (len + strlen(buf) >= PAGE_SIZE) \ 1831 break; \ 1832 len += sprintf(page+len, "%s", buf); \ 1833 \ 1834 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1835 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 1836 if (len + strlen(buf) >= PAGE_SIZE) \ 1837 break; \ 1838 len += sprintf(page+len, "%s", buf); \ 1839 \ 1840 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1841 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 1842 if (len + strlen(buf) >= PAGE_SIZE) \ 1843 break; \ 1844 len += sprintf(page+len, "%s", buf); \ 1845 } \ 1846 spin_unlock(&t10_wwn->t10_vpd_lock); \ 1847 \ 1848 return len; \ 1849 } 1850 1851 /* VPD page 0x83 Association: Logical Unit */ 1852 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 1853 /* VPD page 0x83 Association: Target Port */ 1854 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 1855 /* VPD page 0x83 Association: SCSI Target Device */ 1856 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 1857 1858 CONFIGFS_ATTR(target_wwn_, vendor_id); 1859 CONFIGFS_ATTR(target_wwn_, product_id); 1860 CONFIGFS_ATTR(target_wwn_, revision); 1861 CONFIGFS_ATTR(target_wwn_, company_id); 1862 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial); 1863 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier); 1864 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit); 1865 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port); 1866 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device); 1867 CONFIGFS_ATTR(target_wwn_, pd_text_id_info); 1868 1869 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 1870 &target_wwn_attr_vendor_id, 1871 &target_wwn_attr_product_id, 1872 &target_wwn_attr_revision, 1873 &target_wwn_attr_company_id, 1874 &target_wwn_attr_vpd_unit_serial, 1875 &target_wwn_attr_vpd_protocol_identifier, 1876 &target_wwn_attr_vpd_assoc_logical_unit, 1877 &target_wwn_attr_vpd_assoc_target_port, 1878 &target_wwn_attr_vpd_assoc_scsi_target_device, 1879 &target_wwn_attr_pd_text_id_info, 1880 NULL, 1881 }; 1882 1883 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs); 1884 1885 /* End functions for struct config_item_type tb_dev_wwn_cit */ 1886 1887 /* Start functions for struct config_item_type tb_dev_pr_cit */ 1888 1889 static struct se_device *pr_to_dev(struct config_item *item) 1890 { 1891 return container_of(to_config_group(item), struct se_device, 1892 dev_pr_group); 1893 } 1894 1895 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev, 1896 char *page) 1897 { 1898 struct se_node_acl *se_nacl; 1899 struct t10_pr_registration *pr_reg; 1900 char i_buf[PR_REG_ISID_ID_LEN] = { }; 1901 1902 pr_reg = dev->dev_pr_res_holder; 1903 if (!pr_reg) 1904 return sprintf(page, "No SPC-3 Reservation holder\n"); 1905 1906 se_nacl = pr_reg->pr_reg_nacl; 1907 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1908 1909 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", 1910 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1911 se_nacl->initiatorname, i_buf); 1912 } 1913 1914 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, 1915 char *page) 1916 { 1917 struct se_session *sess = dev->reservation_holder; 1918 struct se_node_acl *se_nacl; 1919 ssize_t len; 1920 1921 if (sess) { 1922 se_nacl = sess->se_node_acl; 1923 len = sprintf(page, 1924 "SPC-2 Reservation: %s Initiator: %s\n", 1925 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1926 se_nacl->initiatorname); 1927 } else { 1928 len = sprintf(page, "No SPC-2 Reservation holder\n"); 1929 } 1930 return len; 1931 } 1932 1933 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page) 1934 { 1935 struct se_device *dev = pr_to_dev(item); 1936 int ret; 1937 1938 if (!dev->dev_attrib.emulate_pr) 1939 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 1940 1941 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1942 return sprintf(page, "Passthrough\n"); 1943 1944 spin_lock(&dev->dev_reservation_lock); 1945 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1946 ret = target_core_dev_pr_show_spc2_res(dev, page); 1947 else 1948 ret = target_core_dev_pr_show_spc3_res(dev, page); 1949 spin_unlock(&dev->dev_reservation_lock); 1950 return ret; 1951 } 1952 1953 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item, 1954 char *page) 1955 { 1956 struct se_device *dev = pr_to_dev(item); 1957 ssize_t len = 0; 1958 1959 spin_lock(&dev->dev_reservation_lock); 1960 if (!dev->dev_pr_res_holder) { 1961 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1962 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { 1963 len = sprintf(page, "SPC-3 Reservation: All Target" 1964 " Ports registration\n"); 1965 } else { 1966 len = sprintf(page, "SPC-3 Reservation: Single" 1967 " Target Port registration\n"); 1968 } 1969 1970 spin_unlock(&dev->dev_reservation_lock); 1971 return len; 1972 } 1973 1974 static ssize_t target_pr_res_pr_generation_show(struct config_item *item, 1975 char *page) 1976 { 1977 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation); 1978 } 1979 1980 1981 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item, 1982 char *page) 1983 { 1984 struct se_device *dev = pr_to_dev(item); 1985 struct se_node_acl *se_nacl; 1986 struct se_portal_group *se_tpg; 1987 struct t10_pr_registration *pr_reg; 1988 const struct target_core_fabric_ops *tfo; 1989 ssize_t len = 0; 1990 1991 spin_lock(&dev->dev_reservation_lock); 1992 pr_reg = dev->dev_pr_res_holder; 1993 if (!pr_reg) { 1994 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1995 goto out_unlock; 1996 } 1997 1998 se_nacl = pr_reg->pr_reg_nacl; 1999 se_tpg = se_nacl->se_tpg; 2000 tfo = se_tpg->se_tpg_tfo; 2001 2002 len += sprintf(page+len, "SPC-3 Reservation: %s" 2003 " Target Node Endpoint: %s\n", tfo->fabric_name, 2004 tfo->tpg_get_wwn(se_tpg)); 2005 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 2006 " Identifier Tag: %hu %s Portal Group Tag: %hu" 2007 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi, 2008 tfo->fabric_name, tfo->tpg_get_tag(se_tpg), 2009 tfo->fabric_name, pr_reg->pr_aptpl_target_lun); 2010 2011 out_unlock: 2012 spin_unlock(&dev->dev_reservation_lock); 2013 return len; 2014 } 2015 2016 2017 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item, 2018 char *page) 2019 { 2020 struct se_device *dev = pr_to_dev(item); 2021 const struct target_core_fabric_ops *tfo; 2022 struct t10_pr_registration *pr_reg; 2023 unsigned char buf[384]; 2024 char i_buf[PR_REG_ISID_ID_LEN]; 2025 ssize_t len = 0; 2026 int reg_count = 0; 2027 2028 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 2029 2030 spin_lock(&dev->t10_pr.registration_lock); 2031 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 2032 pr_reg_list) { 2033 2034 memset(buf, 0, 384); 2035 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 2036 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 2037 core_pr_dump_initiator_port(pr_reg, i_buf, 2038 PR_REG_ISID_ID_LEN); 2039 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 2040 tfo->fabric_name, 2041 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, 2042 pr_reg->pr_res_generation); 2043 2044 if (len + strlen(buf) >= PAGE_SIZE) 2045 break; 2046 2047 len += sprintf(page+len, "%s", buf); 2048 reg_count++; 2049 } 2050 spin_unlock(&dev->t10_pr.registration_lock); 2051 2052 if (!reg_count) 2053 len += sprintf(page+len, "None\n"); 2054 2055 return len; 2056 } 2057 2058 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page) 2059 { 2060 struct se_device *dev = pr_to_dev(item); 2061 struct t10_pr_registration *pr_reg; 2062 ssize_t len = 0; 2063 2064 spin_lock(&dev->dev_reservation_lock); 2065 pr_reg = dev->dev_pr_res_holder; 2066 if (pr_reg) { 2067 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 2068 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 2069 } else { 2070 len = sprintf(page, "No SPC-3 Reservation holder\n"); 2071 } 2072 2073 spin_unlock(&dev->dev_reservation_lock); 2074 return len; 2075 } 2076 2077 static ssize_t target_pr_res_type_show(struct config_item *item, char *page) 2078 { 2079 struct se_device *dev = pr_to_dev(item); 2080 2081 if (!dev->dev_attrib.emulate_pr) 2082 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 2083 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 2084 return sprintf(page, "SPC_PASSTHROUGH\n"); 2085 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 2086 return sprintf(page, "SPC2_RESERVATIONS\n"); 2087 2088 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 2089 } 2090 2091 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item, 2092 char *page) 2093 { 2094 struct se_device *dev = pr_to_dev(item); 2095 2096 if (!dev->dev_attrib.emulate_pr || 2097 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 2098 return 0; 2099 2100 return sprintf(page, "APTPL Bit Status: %s\n", 2101 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 2102 } 2103 2104 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item, 2105 char *page) 2106 { 2107 struct se_device *dev = pr_to_dev(item); 2108 2109 if (!dev->dev_attrib.emulate_pr || 2110 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 2111 return 0; 2112 2113 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 2114 } 2115 2116 enum { 2117 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 2118 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 2119 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 2120 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 2121 }; 2122 2123 static match_table_t tokens = { 2124 {Opt_initiator_fabric, "initiator_fabric=%s"}, 2125 {Opt_initiator_node, "initiator_node=%s"}, 2126 {Opt_initiator_sid, "initiator_sid=%s"}, 2127 {Opt_sa_res_key, "sa_res_key=%s"}, 2128 {Opt_res_holder, "res_holder=%d"}, 2129 {Opt_res_type, "res_type=%d"}, 2130 {Opt_res_scope, "res_scope=%d"}, 2131 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 2132 {Opt_mapped_lun, "mapped_lun=%u"}, 2133 {Opt_target_fabric, "target_fabric=%s"}, 2134 {Opt_target_node, "target_node=%s"}, 2135 {Opt_tpgt, "tpgt=%d"}, 2136 {Opt_port_rtpi, "port_rtpi=%d"}, 2137 {Opt_target_lun, "target_lun=%u"}, 2138 {Opt_err, NULL} 2139 }; 2140 2141 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item, 2142 const char *page, size_t count) 2143 { 2144 struct se_device *dev = pr_to_dev(item); 2145 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 2146 unsigned char *t_fabric = NULL, *t_port = NULL; 2147 char *orig, *ptr, *opts; 2148 substring_t args[MAX_OPT_ARGS]; 2149 unsigned long long tmp_ll; 2150 u64 sa_res_key = 0; 2151 u64 mapped_lun = 0, target_lun = 0; 2152 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 2153 u16 tpgt = 0; 2154 u8 type = 0; 2155 2156 if (!dev->dev_attrib.emulate_pr || 2157 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 2158 return count; 2159 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 2160 return count; 2161 2162 if (dev->export_count) { 2163 pr_debug("Unable to process APTPL metadata while" 2164 " active fabric exports exist\n"); 2165 return -EINVAL; 2166 } 2167 2168 opts = kstrdup(page, GFP_KERNEL); 2169 if (!opts) 2170 return -ENOMEM; 2171 2172 orig = opts; 2173 while ((ptr = strsep(&opts, ",\n")) != NULL) { 2174 if (!*ptr) 2175 continue; 2176 2177 token = match_token(ptr, tokens, args); 2178 switch (token) { 2179 case Opt_initiator_fabric: 2180 i_fabric = match_strdup(args); 2181 if (!i_fabric) { 2182 ret = -ENOMEM; 2183 goto out; 2184 } 2185 break; 2186 case Opt_initiator_node: 2187 i_port = match_strdup(args); 2188 if (!i_port) { 2189 ret = -ENOMEM; 2190 goto out; 2191 } 2192 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 2193 pr_err("APTPL metadata initiator_node=" 2194 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 2195 PR_APTPL_MAX_IPORT_LEN); 2196 ret = -EINVAL; 2197 break; 2198 } 2199 break; 2200 case Opt_initiator_sid: 2201 isid = match_strdup(args); 2202 if (!isid) { 2203 ret = -ENOMEM; 2204 goto out; 2205 } 2206 if (strlen(isid) >= PR_REG_ISID_LEN) { 2207 pr_err("APTPL metadata initiator_isid" 2208 "= exceeds PR_REG_ISID_LEN: %d\n", 2209 PR_REG_ISID_LEN); 2210 ret = -EINVAL; 2211 break; 2212 } 2213 break; 2214 case Opt_sa_res_key: 2215 ret = match_u64(args, &tmp_ll); 2216 if (ret < 0) { 2217 pr_err("kstrtoull() failed for sa_res_key=\n"); 2218 goto out; 2219 } 2220 sa_res_key = (u64)tmp_ll; 2221 break; 2222 /* 2223 * PR APTPL Metadata for Reservation 2224 */ 2225 case Opt_res_holder: 2226 ret = match_int(args, &arg); 2227 if (ret) 2228 goto out; 2229 res_holder = arg; 2230 break; 2231 case Opt_res_type: 2232 ret = match_int(args, &arg); 2233 if (ret) 2234 goto out; 2235 type = (u8)arg; 2236 break; 2237 case Opt_res_scope: 2238 ret = match_int(args, &arg); 2239 if (ret) 2240 goto out; 2241 break; 2242 case Opt_res_all_tg_pt: 2243 ret = match_int(args, &arg); 2244 if (ret) 2245 goto out; 2246 all_tg_pt = (int)arg; 2247 break; 2248 case Opt_mapped_lun: 2249 ret = match_u64(args, &tmp_ll); 2250 if (ret) 2251 goto out; 2252 mapped_lun = (u64)tmp_ll; 2253 break; 2254 /* 2255 * PR APTPL Metadata for Target Port 2256 */ 2257 case Opt_target_fabric: 2258 t_fabric = match_strdup(args); 2259 if (!t_fabric) { 2260 ret = -ENOMEM; 2261 goto out; 2262 } 2263 break; 2264 case Opt_target_node: 2265 t_port = match_strdup(args); 2266 if (!t_port) { 2267 ret = -ENOMEM; 2268 goto out; 2269 } 2270 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 2271 pr_err("APTPL metadata target_node=" 2272 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 2273 PR_APTPL_MAX_TPORT_LEN); 2274 ret = -EINVAL; 2275 break; 2276 } 2277 break; 2278 case Opt_tpgt: 2279 ret = match_int(args, &arg); 2280 if (ret) 2281 goto out; 2282 tpgt = (u16)arg; 2283 break; 2284 case Opt_port_rtpi: 2285 ret = match_int(args, &arg); 2286 if (ret) 2287 goto out; 2288 break; 2289 case Opt_target_lun: 2290 ret = match_u64(args, &tmp_ll); 2291 if (ret) 2292 goto out; 2293 target_lun = (u64)tmp_ll; 2294 break; 2295 default: 2296 break; 2297 } 2298 } 2299 2300 if (!i_port || !t_port || !sa_res_key) { 2301 pr_err("Illegal parameters for APTPL registration\n"); 2302 ret = -EINVAL; 2303 goto out; 2304 } 2305 2306 if (res_holder && !(type)) { 2307 pr_err("Illegal PR type: 0x%02x for reservation" 2308 " holder\n", type); 2309 ret = -EINVAL; 2310 goto out; 2311 } 2312 2313 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, 2314 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 2315 res_holder, all_tg_pt, type); 2316 out: 2317 kfree(i_fabric); 2318 kfree(i_port); 2319 kfree(isid); 2320 kfree(t_fabric); 2321 kfree(t_port); 2322 kfree(orig); 2323 return (ret == 0) ? count : ret; 2324 } 2325 2326 2327 CONFIGFS_ATTR_RO(target_pr_, res_holder); 2328 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts); 2329 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation); 2330 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port); 2331 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts); 2332 CONFIGFS_ATTR_RO(target_pr_, res_pr_type); 2333 CONFIGFS_ATTR_RO(target_pr_, res_type); 2334 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active); 2335 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata); 2336 2337 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 2338 &target_pr_attr_res_holder, 2339 &target_pr_attr_res_pr_all_tgt_pts, 2340 &target_pr_attr_res_pr_generation, 2341 &target_pr_attr_res_pr_holder_tg_port, 2342 &target_pr_attr_res_pr_registered_i_pts, 2343 &target_pr_attr_res_pr_type, 2344 &target_pr_attr_res_type, 2345 &target_pr_attr_res_aptpl_active, 2346 &target_pr_attr_res_aptpl_metadata, 2347 NULL, 2348 }; 2349 2350 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs); 2351 2352 /* End functions for struct config_item_type tb_dev_pr_cit */ 2353 2354 /* Start functions for struct config_item_type tb_dev_cit */ 2355 2356 static inline struct se_device *to_device(struct config_item *item) 2357 { 2358 return container_of(to_config_group(item), struct se_device, dev_group); 2359 } 2360 2361 static ssize_t target_dev_info_show(struct config_item *item, char *page) 2362 { 2363 struct se_device *dev = to_device(item); 2364 int bl = 0; 2365 ssize_t read_bytes = 0; 2366 2367 transport_dump_dev_state(dev, page, &bl); 2368 read_bytes += bl; 2369 read_bytes += dev->transport->show_configfs_dev_params(dev, 2370 page+read_bytes); 2371 return read_bytes; 2372 } 2373 2374 static ssize_t target_dev_control_store(struct config_item *item, 2375 const char *page, size_t count) 2376 { 2377 struct se_device *dev = to_device(item); 2378 2379 return dev->transport->set_configfs_dev_params(dev, page, count); 2380 } 2381 2382 static ssize_t target_dev_alias_show(struct config_item *item, char *page) 2383 { 2384 struct se_device *dev = to_device(item); 2385 2386 if (!(dev->dev_flags & DF_USING_ALIAS)) 2387 return 0; 2388 2389 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); 2390 } 2391 2392 static ssize_t target_dev_alias_store(struct config_item *item, 2393 const char *page, size_t count) 2394 { 2395 struct se_device *dev = to_device(item); 2396 struct se_hba *hba = dev->se_hba; 2397 ssize_t read_bytes; 2398 2399 if (count > (SE_DEV_ALIAS_LEN-1)) { 2400 pr_err("alias count: %d exceeds" 2401 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 2402 SE_DEV_ALIAS_LEN-1); 2403 return -EINVAL; 2404 } 2405 2406 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); 2407 if (!read_bytes) 2408 return -EINVAL; 2409 if (dev->dev_alias[read_bytes - 1] == '\n') 2410 dev->dev_alias[read_bytes - 1] = '\0'; 2411 2412 dev->dev_flags |= DF_USING_ALIAS; 2413 2414 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 2415 config_item_name(&hba->hba_group.cg_item), 2416 config_item_name(&dev->dev_group.cg_item), 2417 dev->dev_alias); 2418 2419 return read_bytes; 2420 } 2421 2422 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page) 2423 { 2424 struct se_device *dev = to_device(item); 2425 2426 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) 2427 return 0; 2428 2429 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); 2430 } 2431 2432 static ssize_t target_dev_udev_path_store(struct config_item *item, 2433 const char *page, size_t count) 2434 { 2435 struct se_device *dev = to_device(item); 2436 struct se_hba *hba = dev->se_hba; 2437 ssize_t read_bytes; 2438 2439 if (count > (SE_UDEV_PATH_LEN-1)) { 2440 pr_err("udev_path count: %d exceeds" 2441 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 2442 SE_UDEV_PATH_LEN-1); 2443 return -EINVAL; 2444 } 2445 2446 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, 2447 "%s", page); 2448 if (!read_bytes) 2449 return -EINVAL; 2450 if (dev->udev_path[read_bytes - 1] == '\n') 2451 dev->udev_path[read_bytes - 1] = '\0'; 2452 2453 dev->dev_flags |= DF_USING_UDEV_PATH; 2454 2455 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 2456 config_item_name(&hba->hba_group.cg_item), 2457 config_item_name(&dev->dev_group.cg_item), 2458 dev->udev_path); 2459 2460 return read_bytes; 2461 } 2462 2463 static ssize_t target_dev_enable_show(struct config_item *item, char *page) 2464 { 2465 struct se_device *dev = to_device(item); 2466 2467 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev)); 2468 } 2469 2470 static ssize_t target_dev_enable_store(struct config_item *item, 2471 const char *page, size_t count) 2472 { 2473 struct se_device *dev = to_device(item); 2474 char *ptr; 2475 int ret; 2476 2477 ptr = strstr(page, "1"); 2478 if (!ptr) { 2479 pr_err("For dev_enable ops, only valid value" 2480 " is \"1\"\n"); 2481 return -EINVAL; 2482 } 2483 2484 ret = target_configure_device(dev); 2485 if (ret) 2486 return ret; 2487 return count; 2488 } 2489 2490 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page) 2491 { 2492 struct se_device *dev = to_device(item); 2493 struct config_item *lu_ci; 2494 struct t10_alua_lu_gp *lu_gp; 2495 struct t10_alua_lu_gp_member *lu_gp_mem; 2496 ssize_t len = 0; 2497 2498 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2499 if (!lu_gp_mem) 2500 return 0; 2501 2502 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2503 lu_gp = lu_gp_mem->lu_gp; 2504 if (lu_gp) { 2505 lu_ci = &lu_gp->lu_gp_group.cg_item; 2506 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 2507 config_item_name(lu_ci), lu_gp->lu_gp_id); 2508 } 2509 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2510 2511 return len; 2512 } 2513 2514 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item, 2515 const char *page, size_t count) 2516 { 2517 struct se_device *dev = to_device(item); 2518 struct se_hba *hba = dev->se_hba; 2519 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 2520 struct t10_alua_lu_gp_member *lu_gp_mem; 2521 unsigned char buf[LU_GROUP_NAME_BUF] = { }; 2522 int move = 0; 2523 2524 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2525 if (!lu_gp_mem) 2526 return count; 2527 2528 if (count > LU_GROUP_NAME_BUF) { 2529 pr_err("ALUA LU Group Alias too large!\n"); 2530 return -EINVAL; 2531 } 2532 memcpy(buf, page, count); 2533 /* 2534 * Any ALUA logical unit alias besides "NULL" means we will be 2535 * making a new group association. 2536 */ 2537 if (strcmp(strstrip(buf), "NULL")) { 2538 /* 2539 * core_alua_get_lu_gp_by_name() will increment reference to 2540 * struct t10_alua_lu_gp. This reference is released with 2541 * core_alua_get_lu_gp_by_name below(). 2542 */ 2543 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 2544 if (!lu_gp_new) 2545 return -ENODEV; 2546 } 2547 2548 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2549 lu_gp = lu_gp_mem->lu_gp; 2550 if (lu_gp) { 2551 /* 2552 * Clearing an existing lu_gp association, and replacing 2553 * with NULL 2554 */ 2555 if (!lu_gp_new) { 2556 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 2557 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 2558 " %hu\n", 2559 config_item_name(&hba->hba_group.cg_item), 2560 config_item_name(&dev->dev_group.cg_item), 2561 config_item_name(&lu_gp->lu_gp_group.cg_item), 2562 lu_gp->lu_gp_id); 2563 2564 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2565 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2566 2567 return count; 2568 } 2569 /* 2570 * Removing existing association of lu_gp_mem with lu_gp 2571 */ 2572 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2573 move = 1; 2574 } 2575 /* 2576 * Associate lu_gp_mem with lu_gp_new. 2577 */ 2578 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 2579 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2580 2581 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 2582 " core/alua/lu_gps/%s, ID: %hu\n", 2583 (move) ? "Moving" : "Adding", 2584 config_item_name(&hba->hba_group.cg_item), 2585 config_item_name(&dev->dev_group.cg_item), 2586 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 2587 lu_gp_new->lu_gp_id); 2588 2589 core_alua_put_lu_gp_from_name(lu_gp_new); 2590 return count; 2591 } 2592 2593 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page) 2594 { 2595 struct se_device *dev = to_device(item); 2596 struct t10_alua_lba_map *map; 2597 struct t10_alua_lba_map_member *mem; 2598 char *b = page; 2599 int bl = 0; 2600 char state; 2601 2602 spin_lock(&dev->t10_alua.lba_map_lock); 2603 if (!list_empty(&dev->t10_alua.lba_map_list)) 2604 bl += sprintf(b + bl, "%u %u\n", 2605 dev->t10_alua.lba_map_segment_size, 2606 dev->t10_alua.lba_map_segment_multiplier); 2607 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) { 2608 bl += sprintf(b + bl, "%llu %llu", 2609 map->lba_map_first_lba, map->lba_map_last_lba); 2610 list_for_each_entry(mem, &map->lba_map_mem_list, 2611 lba_map_mem_list) { 2612 switch (mem->lba_map_mem_alua_state) { 2613 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: 2614 state = 'O'; 2615 break; 2616 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: 2617 state = 'A'; 2618 break; 2619 case ALUA_ACCESS_STATE_STANDBY: 2620 state = 'S'; 2621 break; 2622 case ALUA_ACCESS_STATE_UNAVAILABLE: 2623 state = 'U'; 2624 break; 2625 default: 2626 state = '.'; 2627 break; 2628 } 2629 bl += sprintf(b + bl, " %d:%c", 2630 mem->lba_map_mem_alua_pg_id, state); 2631 } 2632 bl += sprintf(b + bl, "\n"); 2633 } 2634 spin_unlock(&dev->t10_alua.lba_map_lock); 2635 return bl; 2636 } 2637 2638 static ssize_t target_dev_lba_map_store(struct config_item *item, 2639 const char *page, size_t count) 2640 { 2641 struct se_device *dev = to_device(item); 2642 struct t10_alua_lba_map *lba_map = NULL; 2643 struct list_head lba_list; 2644 char *map_entries, *orig, *ptr; 2645 char state; 2646 int pg_num = -1, pg; 2647 int ret = 0, num = 0, pg_id, alua_state; 2648 unsigned long start_lba = -1, end_lba = -1; 2649 unsigned long segment_size = -1, segment_mult = -1; 2650 2651 orig = map_entries = kstrdup(page, GFP_KERNEL); 2652 if (!map_entries) 2653 return -ENOMEM; 2654 2655 INIT_LIST_HEAD(&lba_list); 2656 while ((ptr = strsep(&map_entries, "\n")) != NULL) { 2657 if (!*ptr) 2658 continue; 2659 2660 if (num == 0) { 2661 if (sscanf(ptr, "%lu %lu\n", 2662 &segment_size, &segment_mult) != 2) { 2663 pr_err("Invalid line %d\n", num); 2664 ret = -EINVAL; 2665 break; 2666 } 2667 num++; 2668 continue; 2669 } 2670 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) { 2671 pr_err("Invalid line %d\n", num); 2672 ret = -EINVAL; 2673 break; 2674 } 2675 ptr = strchr(ptr, ' '); 2676 if (!ptr) { 2677 pr_err("Invalid line %d, missing end lba\n", num); 2678 ret = -EINVAL; 2679 break; 2680 } 2681 ptr++; 2682 ptr = strchr(ptr, ' '); 2683 if (!ptr) { 2684 pr_err("Invalid line %d, missing state definitions\n", 2685 num); 2686 ret = -EINVAL; 2687 break; 2688 } 2689 ptr++; 2690 lba_map = core_alua_allocate_lba_map(&lba_list, 2691 start_lba, end_lba); 2692 if (IS_ERR(lba_map)) { 2693 ret = PTR_ERR(lba_map); 2694 break; 2695 } 2696 pg = 0; 2697 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) { 2698 switch (state) { 2699 case 'O': 2700 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED; 2701 break; 2702 case 'A': 2703 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED; 2704 break; 2705 case 'S': 2706 alua_state = ALUA_ACCESS_STATE_STANDBY; 2707 break; 2708 case 'U': 2709 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE; 2710 break; 2711 default: 2712 pr_err("Invalid ALUA state '%c'\n", state); 2713 ret = -EINVAL; 2714 goto out; 2715 } 2716 2717 ret = core_alua_allocate_lba_map_mem(lba_map, 2718 pg_id, alua_state); 2719 if (ret) { 2720 pr_err("Invalid target descriptor %d:%c " 2721 "at line %d\n", 2722 pg_id, state, num); 2723 break; 2724 } 2725 pg++; 2726 ptr = strchr(ptr, ' '); 2727 if (ptr) 2728 ptr++; 2729 else 2730 break; 2731 } 2732 if (pg_num == -1) 2733 pg_num = pg; 2734 else if (pg != pg_num) { 2735 pr_err("Only %d from %d port groups definitions " 2736 "at line %d\n", pg, pg_num, num); 2737 ret = -EINVAL; 2738 break; 2739 } 2740 num++; 2741 } 2742 out: 2743 if (ret) { 2744 core_alua_free_lba_map(&lba_list); 2745 count = ret; 2746 } else 2747 core_alua_set_lba_map(dev, &lba_list, 2748 segment_size, segment_mult); 2749 kfree(orig); 2750 return count; 2751 } 2752 2753 CONFIGFS_ATTR_RO(target_dev_, info); 2754 CONFIGFS_ATTR_WO(target_dev_, control); 2755 CONFIGFS_ATTR(target_dev_, alias); 2756 CONFIGFS_ATTR(target_dev_, udev_path); 2757 CONFIGFS_ATTR(target_dev_, enable); 2758 CONFIGFS_ATTR(target_dev_, alua_lu_gp); 2759 CONFIGFS_ATTR(target_dev_, lba_map); 2760 2761 static struct configfs_attribute *target_core_dev_attrs[] = { 2762 &target_dev_attr_info, 2763 &target_dev_attr_control, 2764 &target_dev_attr_alias, 2765 &target_dev_attr_udev_path, 2766 &target_dev_attr_enable, 2767 &target_dev_attr_alua_lu_gp, 2768 &target_dev_attr_lba_map, 2769 NULL, 2770 }; 2771 2772 static void target_core_dev_release(struct config_item *item) 2773 { 2774 struct config_group *dev_cg = to_config_group(item); 2775 struct se_device *dev = 2776 container_of(dev_cg, struct se_device, dev_group); 2777 2778 target_free_device(dev); 2779 } 2780 2781 /* 2782 * Used in target_core_fabric_configfs.c to verify valid se_device symlink 2783 * within target_fabric_port_link() 2784 */ 2785 struct configfs_item_operations target_core_dev_item_ops = { 2786 .release = target_core_dev_release, 2787 }; 2788 2789 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs); 2790 2791 /* End functions for struct config_item_type tb_dev_cit */ 2792 2793 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 2794 2795 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item) 2796 { 2797 return container_of(to_config_group(item), struct t10_alua_lu_gp, 2798 lu_gp_group); 2799 } 2800 2801 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page) 2802 { 2803 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2804 2805 if (!lu_gp->lu_gp_valid_id) 2806 return 0; 2807 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2808 } 2809 2810 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item, 2811 const char *page, size_t count) 2812 { 2813 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2814 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2815 unsigned long lu_gp_id; 2816 int ret; 2817 2818 ret = kstrtoul(page, 0, &lu_gp_id); 2819 if (ret < 0) { 2820 pr_err("kstrtoul() returned %d for" 2821 " lu_gp_id\n", ret); 2822 return ret; 2823 } 2824 if (lu_gp_id > 0x0000ffff) { 2825 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 2826 " 0x0000ffff\n", lu_gp_id); 2827 return -EINVAL; 2828 } 2829 2830 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2831 if (ret < 0) 2832 return -EINVAL; 2833 2834 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 2835 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2836 config_item_name(&alua_lu_gp_cg->cg_item), 2837 lu_gp->lu_gp_id); 2838 2839 return count; 2840 } 2841 2842 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page) 2843 { 2844 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2845 struct t10_alua_lu_gp_member *lu_gp_mem; 2846 const char *const end = page + PAGE_SIZE; 2847 char *cur = page; 2848 2849 spin_lock(&lu_gp->lu_gp_lock); 2850 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2851 struct se_device *dev = lu_gp_mem->lu_gp_mem_dev; 2852 struct se_hba *hba = dev->se_hba; 2853 2854 cur += scnprintf(cur, end - cur, "%s/%s\n", 2855 config_item_name(&hba->hba_group.cg_item), 2856 config_item_name(&dev->dev_group.cg_item)); 2857 if (WARN_ON_ONCE(cur >= end)) 2858 break; 2859 } 2860 spin_unlock(&lu_gp->lu_gp_lock); 2861 2862 return cur - page; 2863 } 2864 2865 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id); 2866 CONFIGFS_ATTR_RO(target_lu_gp_, members); 2867 2868 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2869 &target_lu_gp_attr_lu_gp_id, 2870 &target_lu_gp_attr_members, 2871 NULL, 2872 }; 2873 2874 static void target_core_alua_lu_gp_release(struct config_item *item) 2875 { 2876 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2877 struct t10_alua_lu_gp, lu_gp_group); 2878 2879 core_alua_free_lu_gp(lu_gp); 2880 } 2881 2882 static const struct configfs_item_operations target_core_alua_lu_gp_ops = { 2883 .release = target_core_alua_lu_gp_release, 2884 }; 2885 2886 static const struct config_item_type target_core_alua_lu_gp_cit = { 2887 .ct_item_ops = &target_core_alua_lu_gp_ops, 2888 .ct_attrs = target_core_alua_lu_gp_attrs, 2889 .ct_owner = THIS_MODULE, 2890 }; 2891 2892 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2893 2894 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2895 2896 static struct config_group *target_core_alua_create_lu_gp( 2897 struct config_group *group, 2898 const char *name) 2899 { 2900 struct t10_alua_lu_gp *lu_gp; 2901 struct config_group *alua_lu_gp_cg = NULL; 2902 struct config_item *alua_lu_gp_ci = NULL; 2903 2904 lu_gp = core_alua_allocate_lu_gp(name, 0); 2905 if (IS_ERR(lu_gp)) 2906 return NULL; 2907 2908 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2909 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2910 2911 config_group_init_type_name(alua_lu_gp_cg, name, 2912 &target_core_alua_lu_gp_cit); 2913 2914 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2915 " Group: core/alua/lu_gps/%s\n", 2916 config_item_name(alua_lu_gp_ci)); 2917 2918 return alua_lu_gp_cg; 2919 2920 } 2921 2922 static void target_core_alua_drop_lu_gp( 2923 struct config_group *group, 2924 struct config_item *item) 2925 { 2926 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2927 struct t10_alua_lu_gp, lu_gp_group); 2928 2929 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2930 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2931 config_item_name(item), lu_gp->lu_gp_id); 2932 /* 2933 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 2934 * -> target_core_alua_lu_gp_release() 2935 */ 2936 config_item_put(item); 2937 } 2938 2939 static const struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2940 .make_group = &target_core_alua_create_lu_gp, 2941 .drop_item = &target_core_alua_drop_lu_gp, 2942 }; 2943 2944 static const struct config_item_type target_core_alua_lu_gps_cit = { 2945 .ct_item_ops = NULL, 2946 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2947 .ct_owner = THIS_MODULE, 2948 }; 2949 2950 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2951 2952 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2953 2954 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item) 2955 { 2956 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp, 2957 tg_pt_gp_group); 2958 } 2959 2960 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item, 2961 char *page) 2962 { 2963 return sprintf(page, "%d\n", 2964 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state); 2965 } 2966 2967 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item, 2968 const char *page, size_t count) 2969 { 2970 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2971 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; 2972 unsigned long tmp; 2973 int new_state, ret; 2974 2975 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2976 pr_err("Unable to do implicit ALUA on invalid tg_pt_gp ID\n"); 2977 return -EINVAL; 2978 } 2979 if (!target_dev_configured(dev)) { 2980 pr_err("Unable to set alua_access_state while device is" 2981 " not configured\n"); 2982 return -ENODEV; 2983 } 2984 2985 ret = kstrtoul(page, 0, &tmp); 2986 if (ret < 0) { 2987 pr_err("Unable to extract new ALUA access state from" 2988 " %s\n", page); 2989 return ret; 2990 } 2991 new_state = (int)tmp; 2992 2993 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) { 2994 pr_err("Unable to process implicit configfs ALUA" 2995 " transition while TPGS_IMPLICIT_ALUA is disabled\n"); 2996 return -EINVAL; 2997 } 2998 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA && 2999 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) { 3000 /* LBA DEPENDENT is only allowed with implicit ALUA */ 3001 pr_err("Unable to process implicit configfs ALUA transition" 3002 " while explicit ALUA management is enabled\n"); 3003 return -EINVAL; 3004 } 3005 3006 ret = core_alua_do_port_transition(tg_pt_gp, dev, 3007 NULL, NULL, new_state, 0); 3008 return (!ret) ? count : -EINVAL; 3009 } 3010 3011 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item, 3012 char *page) 3013 { 3014 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3015 return sprintf(page, "%s\n", 3016 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 3017 } 3018 3019 static ssize_t target_tg_pt_gp_alua_access_status_store( 3020 struct config_item *item, const char *page, size_t count) 3021 { 3022 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3023 unsigned long tmp; 3024 int new_status, ret; 3025 3026 if (!tg_pt_gp->tg_pt_gp_valid_id) { 3027 pr_err("Unable to set ALUA access status on invalid tg_pt_gp ID\n"); 3028 return -EINVAL; 3029 } 3030 3031 ret = kstrtoul(page, 0, &tmp); 3032 if (ret < 0) { 3033 pr_err("Unable to extract new ALUA access status" 3034 " from %s\n", page); 3035 return ret; 3036 } 3037 new_status = (int)tmp; 3038 3039 if ((new_status != ALUA_STATUS_NONE) && 3040 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && 3041 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { 3042 pr_err("Illegal ALUA access status: 0x%02x\n", 3043 new_status); 3044 return -EINVAL; 3045 } 3046 3047 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 3048 return count; 3049 } 3050 3051 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item, 3052 char *page) 3053 { 3054 return core_alua_show_access_type(to_tg_pt_gp(item), page); 3055 } 3056 3057 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item, 3058 const char *page, size_t count) 3059 { 3060 return core_alua_store_access_type(to_tg_pt_gp(item), page, count); 3061 } 3062 3063 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \ 3064 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \ 3065 struct config_item *item, char *p) \ 3066 { \ 3067 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 3068 return sprintf(p, "%d\n", \ 3069 !!(t->tg_pt_gp_alua_supported_states & _bit)); \ 3070 } \ 3071 \ 3072 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \ 3073 struct config_item *item, const char *p, size_t c) \ 3074 { \ 3075 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 3076 unsigned long tmp; \ 3077 int ret; \ 3078 \ 3079 if (!t->tg_pt_gp_valid_id) { \ 3080 pr_err("Unable to set " #_name " ALUA state on invalid tg_pt_gp ID\n"); \ 3081 return -EINVAL; \ 3082 } \ 3083 \ 3084 ret = kstrtoul(p, 0, &tmp); \ 3085 if (ret < 0) { \ 3086 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \ 3087 return -EINVAL; \ 3088 } \ 3089 if (tmp > 1) { \ 3090 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \ 3091 return -EINVAL; \ 3092 } \ 3093 if (tmp) \ 3094 t->tg_pt_gp_alua_supported_states |= _bit; \ 3095 else \ 3096 t->tg_pt_gp_alua_supported_states &= ~_bit; \ 3097 \ 3098 return c; \ 3099 } 3100 3101 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP); 3102 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP); 3103 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP); 3104 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP); 3105 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP); 3106 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP); 3107 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP); 3108 3109 static ssize_t target_tg_pt_gp_alua_write_metadata_show( 3110 struct config_item *item, char *page) 3111 { 3112 return sprintf(page, "%d\n", 3113 to_tg_pt_gp(item)->tg_pt_gp_write_metadata); 3114 } 3115 3116 static ssize_t target_tg_pt_gp_alua_write_metadata_store( 3117 struct config_item *item, const char *page, size_t count) 3118 { 3119 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3120 unsigned long tmp; 3121 int ret; 3122 3123 ret = kstrtoul(page, 0, &tmp); 3124 if (ret < 0) { 3125 pr_err("Unable to extract alua_write_metadata\n"); 3126 return ret; 3127 } 3128 3129 if ((tmp != 0) && (tmp != 1)) { 3130 pr_err("Illegal value for alua_write_metadata:" 3131 " %lu\n", tmp); 3132 return -EINVAL; 3133 } 3134 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 3135 3136 return count; 3137 } 3138 3139 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item, 3140 char *page) 3141 { 3142 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page); 3143 } 3144 3145 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item, 3146 const char *page, size_t count) 3147 { 3148 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page, 3149 count); 3150 } 3151 3152 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item, 3153 char *page) 3154 { 3155 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page); 3156 } 3157 3158 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item, 3159 const char *page, size_t count) 3160 { 3161 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page, 3162 count); 3163 } 3164 3165 static ssize_t target_tg_pt_gp_implicit_trans_secs_show( 3166 struct config_item *item, char *page) 3167 { 3168 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page); 3169 } 3170 3171 static ssize_t target_tg_pt_gp_implicit_trans_secs_store( 3172 struct config_item *item, const char *page, size_t count) 3173 { 3174 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page, 3175 count); 3176 } 3177 3178 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item, 3179 char *page) 3180 { 3181 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page); 3182 } 3183 3184 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item, 3185 const char *page, size_t count) 3186 { 3187 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count); 3188 } 3189 3190 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item, 3191 char *page) 3192 { 3193 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3194 3195 if (!tg_pt_gp->tg_pt_gp_valid_id) 3196 return 0; 3197 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 3198 } 3199 3200 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item, 3201 const char *page, size_t count) 3202 { 3203 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3204 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 3205 unsigned long tg_pt_gp_id; 3206 int ret; 3207 3208 ret = kstrtoul(page, 0, &tg_pt_gp_id); 3209 if (ret < 0) { 3210 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n", 3211 page); 3212 return ret; 3213 } 3214 if (tg_pt_gp_id > 0x0000ffff) { 3215 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n", 3216 tg_pt_gp_id); 3217 return -EINVAL; 3218 } 3219 3220 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 3221 if (ret < 0) 3222 return -EINVAL; 3223 3224 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 3225 "core/alua/tg_pt_gps/%s to ID: %hu\n", 3226 config_item_name(&alua_tg_pt_gp_cg->cg_item), 3227 tg_pt_gp->tg_pt_gp_id); 3228 3229 return count; 3230 } 3231 3232 static ssize_t target_tg_pt_gp_members_show(struct config_item *item, 3233 char *page) 3234 { 3235 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3236 struct se_lun *lun; 3237 ssize_t len = 0, cur_len; 3238 unsigned char buf[TG_PT_GROUP_NAME_BUF] = { }; 3239 3240 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 3241 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, 3242 lun_tg_pt_gp_link) { 3243 struct se_portal_group *tpg = lun->lun_tpg; 3244 3245 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 3246 "/%s\n", tpg->se_tpg_tfo->fabric_name, 3247 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 3248 tpg->se_tpg_tfo->tpg_get_tag(tpg), 3249 config_item_name(&lun->lun_group.cg_item)); 3250 cur_len++; /* Extra byte for NULL terminator */ 3251 3252 if ((cur_len + len) > PAGE_SIZE) { 3253 pr_warn("Ran out of lu_gp_show_attr" 3254 "_members buffer\n"); 3255 break; 3256 } 3257 memcpy(page+len, buf, cur_len); 3258 len += cur_len; 3259 } 3260 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 3261 3262 return len; 3263 } 3264 3265 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state); 3266 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status); 3267 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type); 3268 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning); 3269 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline); 3270 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent); 3271 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable); 3272 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby); 3273 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized); 3274 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized); 3275 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata); 3276 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs); 3277 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs); 3278 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs); 3279 CONFIGFS_ATTR(target_tg_pt_gp_, preferred); 3280 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id); 3281 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members); 3282 3283 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 3284 &target_tg_pt_gp_attr_alua_access_state, 3285 &target_tg_pt_gp_attr_alua_access_status, 3286 &target_tg_pt_gp_attr_alua_access_type, 3287 &target_tg_pt_gp_attr_alua_support_transitioning, 3288 &target_tg_pt_gp_attr_alua_support_offline, 3289 &target_tg_pt_gp_attr_alua_support_lba_dependent, 3290 &target_tg_pt_gp_attr_alua_support_unavailable, 3291 &target_tg_pt_gp_attr_alua_support_standby, 3292 &target_tg_pt_gp_attr_alua_support_active_nonoptimized, 3293 &target_tg_pt_gp_attr_alua_support_active_optimized, 3294 &target_tg_pt_gp_attr_alua_write_metadata, 3295 &target_tg_pt_gp_attr_nonop_delay_msecs, 3296 &target_tg_pt_gp_attr_trans_delay_msecs, 3297 &target_tg_pt_gp_attr_implicit_trans_secs, 3298 &target_tg_pt_gp_attr_preferred, 3299 &target_tg_pt_gp_attr_tg_pt_gp_id, 3300 &target_tg_pt_gp_attr_members, 3301 NULL, 3302 }; 3303 3304 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 3305 { 3306 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3307 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3308 3309 core_alua_free_tg_pt_gp(tg_pt_gp); 3310 } 3311 3312 static const struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 3313 .release = target_core_alua_tg_pt_gp_release, 3314 }; 3315 3316 static const struct config_item_type target_core_alua_tg_pt_gp_cit = { 3317 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 3318 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 3319 .ct_owner = THIS_MODULE, 3320 }; 3321 3322 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 3323 3324 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3325 3326 static struct config_group *target_core_alua_create_tg_pt_gp( 3327 struct config_group *group, 3328 const char *name) 3329 { 3330 struct t10_alua *alua = container_of(group, struct t10_alua, 3331 alua_tg_pt_gps_group); 3332 struct t10_alua_tg_pt_gp *tg_pt_gp; 3333 struct config_group *alua_tg_pt_gp_cg = NULL; 3334 struct config_item *alua_tg_pt_gp_ci = NULL; 3335 3336 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0); 3337 if (!tg_pt_gp) 3338 return NULL; 3339 3340 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 3341 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 3342 3343 config_group_init_type_name(alua_tg_pt_gp_cg, name, 3344 &target_core_alua_tg_pt_gp_cit); 3345 3346 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 3347 " Group: alua/tg_pt_gps/%s\n", 3348 config_item_name(alua_tg_pt_gp_ci)); 3349 3350 return alua_tg_pt_gp_cg; 3351 } 3352 3353 static void target_core_alua_drop_tg_pt_gp( 3354 struct config_group *group, 3355 struct config_item *item) 3356 { 3357 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3358 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3359 3360 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 3361 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 3362 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 3363 /* 3364 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 3365 * -> target_core_alua_tg_pt_gp_release(). 3366 */ 3367 config_item_put(item); 3368 } 3369 3370 static const struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 3371 .make_group = &target_core_alua_create_tg_pt_gp, 3372 .drop_item = &target_core_alua_drop_tg_pt_gp, 3373 }; 3374 3375 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL); 3376 3377 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3378 3379 /* Start functions for struct config_item_type target_core_alua_cit */ 3380 3381 /* 3382 * target_core_alua_cit is a ConfigFS group that lives under 3383 * /sys/kernel/config/target/core/alua. There are default groups 3384 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 3385 * target_core_alua_cit in target_core_init_configfs() below. 3386 */ 3387 static const struct config_item_type target_core_alua_cit = { 3388 .ct_item_ops = NULL, 3389 .ct_attrs = NULL, 3390 .ct_owner = THIS_MODULE, 3391 }; 3392 3393 /* End functions for struct config_item_type target_core_alua_cit */ 3394 3395 /* Start functions for struct config_item_type tb_dev_stat_cit */ 3396 3397 static struct config_group *target_core_stat_mkdir( 3398 struct config_group *group, 3399 const char *name) 3400 { 3401 return ERR_PTR(-ENOSYS); 3402 } 3403 3404 static void target_core_stat_rmdir( 3405 struct config_group *group, 3406 struct config_item *item) 3407 { 3408 return; 3409 } 3410 3411 static const struct configfs_group_operations target_core_stat_group_ops = { 3412 .make_group = &target_core_stat_mkdir, 3413 .drop_item = &target_core_stat_rmdir, 3414 }; 3415 3416 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL); 3417 3418 /* End functions for struct config_item_type tb_dev_stat_cit */ 3419 3420 /* Start functions for struct config_item_type target_core_hba_cit */ 3421 3422 static struct config_group *target_core_make_subdev( 3423 struct config_group *group, 3424 const char *name) 3425 { 3426 struct t10_alua_tg_pt_gp *tg_pt_gp; 3427 struct config_item *hba_ci = &group->cg_item; 3428 struct se_hba *hba = item_to_hba(hba_ci); 3429 struct target_backend *tb = hba->backend; 3430 struct se_device *dev; 3431 int errno = -ENOMEM, ret; 3432 3433 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 3434 if (ret) 3435 return ERR_PTR(ret); 3436 3437 dev = target_alloc_device(hba, name); 3438 if (!dev) 3439 goto out_unlock; 3440 3441 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit); 3442 3443 config_group_init_type_name(&dev->dev_action_group, "action", 3444 &tb->tb_dev_action_cit); 3445 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group); 3446 3447 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib", 3448 &tb->tb_dev_attrib_cit); 3449 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group); 3450 3451 config_group_init_type_name(&dev->dev_pr_group, "pr", 3452 &tb->tb_dev_pr_cit); 3453 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group); 3454 3455 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn", 3456 &tb->tb_dev_wwn_cit); 3457 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group, 3458 &dev->dev_group); 3459 3460 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group, 3461 "alua", &tb->tb_dev_alua_tg_pt_gps_cit); 3462 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group, 3463 &dev->dev_group); 3464 3465 config_group_init_type_name(&dev->dev_stat_grps.stat_group, 3466 "statistics", &tb->tb_dev_stat_cit); 3467 configfs_add_default_group(&dev->dev_stat_grps.stat_group, 3468 &dev->dev_group); 3469 3470 /* 3471 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 3472 */ 3473 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1); 3474 if (!tg_pt_gp) 3475 goto out_free_device; 3476 dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 3477 3478 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 3479 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 3480 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group, 3481 &dev->t10_alua.alua_tg_pt_gps_group); 3482 3483 /* 3484 * Add core/$HBA/$DEV/statistics/ default groups 3485 */ 3486 target_stat_setup_dev_default_groups(dev); 3487 3488 mutex_lock(&target_devices_lock); 3489 target_devices++; 3490 mutex_unlock(&target_devices_lock); 3491 3492 mutex_unlock(&hba->hba_access_mutex); 3493 return &dev->dev_group; 3494 3495 out_free_device: 3496 target_free_device(dev); 3497 out_unlock: 3498 mutex_unlock(&hba->hba_access_mutex); 3499 return ERR_PTR(errno); 3500 } 3501 3502 static void target_core_drop_subdev( 3503 struct config_group *group, 3504 struct config_item *item) 3505 { 3506 struct config_group *dev_cg = to_config_group(item); 3507 struct se_device *dev = 3508 container_of(dev_cg, struct se_device, dev_group); 3509 struct se_hba *hba; 3510 3511 hba = item_to_hba(&dev->se_hba->hba_group.cg_item); 3512 3513 mutex_lock(&hba->hba_access_mutex); 3514 3515 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group); 3516 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group); 3517 3518 /* 3519 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 3520 * directly from target_core_alua_tg_pt_gp_release(). 3521 */ 3522 dev->t10_alua.default_tg_pt_gp = NULL; 3523 3524 configfs_remove_default_groups(dev_cg); 3525 3526 /* 3527 * se_dev is released from target_core_dev_item_ops->release() 3528 */ 3529 config_item_put(item); 3530 3531 mutex_lock(&target_devices_lock); 3532 target_devices--; 3533 mutex_unlock(&target_devices_lock); 3534 3535 mutex_unlock(&hba->hba_access_mutex); 3536 } 3537 3538 static const struct configfs_group_operations target_core_hba_group_ops = { 3539 .make_group = target_core_make_subdev, 3540 .drop_item = target_core_drop_subdev, 3541 }; 3542 3543 3544 static inline struct se_hba *to_hba(struct config_item *item) 3545 { 3546 return container_of(to_config_group(item), struct se_hba, hba_group); 3547 } 3548 3549 static ssize_t target_hba_info_show(struct config_item *item, char *page) 3550 { 3551 struct se_hba *hba = to_hba(item); 3552 3553 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 3554 hba->hba_id, hba->backend->ops->name, 3555 TARGET_CORE_VERSION); 3556 } 3557 3558 static ssize_t target_hba_mode_show(struct config_item *item, char *page) 3559 { 3560 struct se_hba *hba = to_hba(item); 3561 int hba_mode = 0; 3562 3563 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 3564 hba_mode = 1; 3565 3566 return sprintf(page, "%d\n", hba_mode); 3567 } 3568 3569 static ssize_t target_hba_mode_store(struct config_item *item, 3570 const char *page, size_t count) 3571 { 3572 struct se_hba *hba = to_hba(item); 3573 unsigned long mode_flag; 3574 int ret; 3575 3576 if (hba->backend->ops->pmode_enable_hba == NULL) 3577 return -EINVAL; 3578 3579 ret = kstrtoul(page, 0, &mode_flag); 3580 if (ret < 0) { 3581 pr_err("Unable to extract hba mode flag: %d\n", ret); 3582 return ret; 3583 } 3584 3585 if (hba->dev_count) { 3586 pr_err("Unable to set hba_mode with active devices\n"); 3587 return -EINVAL; 3588 } 3589 3590 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag); 3591 if (ret < 0) 3592 return -EINVAL; 3593 if (ret > 0) 3594 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 3595 else if (ret == 0) 3596 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 3597 3598 return count; 3599 } 3600 3601 CONFIGFS_ATTR_RO(target_, hba_info); 3602 CONFIGFS_ATTR(target_, hba_mode); 3603 3604 static void target_core_hba_release(struct config_item *item) 3605 { 3606 struct se_hba *hba = container_of(to_config_group(item), 3607 struct se_hba, hba_group); 3608 core_delete_hba(hba); 3609 } 3610 3611 static struct configfs_attribute *target_core_hba_attrs[] = { 3612 &target_attr_hba_info, 3613 &target_attr_hba_mode, 3614 NULL, 3615 }; 3616 3617 static const struct configfs_item_operations target_core_hba_item_ops = { 3618 .release = target_core_hba_release, 3619 }; 3620 3621 static const struct config_item_type target_core_hba_cit = { 3622 .ct_item_ops = &target_core_hba_item_ops, 3623 .ct_group_ops = &target_core_hba_group_ops, 3624 .ct_attrs = target_core_hba_attrs, 3625 .ct_owner = THIS_MODULE, 3626 }; 3627 3628 static struct config_group *target_core_call_addhbatotarget( 3629 struct config_group *group, 3630 const char *name) 3631 { 3632 char *se_plugin_str, *str, *str2; 3633 struct se_hba *hba; 3634 char buf[TARGET_CORE_NAME_MAX_LEN] = { }; 3635 unsigned long plugin_dep_id = 0; 3636 int ret; 3637 3638 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 3639 pr_err("Passed *name strlen(): %d exceeds" 3640 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 3641 TARGET_CORE_NAME_MAX_LEN); 3642 return ERR_PTR(-ENAMETOOLONG); 3643 } 3644 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 3645 3646 str = strstr(buf, "_"); 3647 if (!str) { 3648 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 3649 return ERR_PTR(-EINVAL); 3650 } 3651 se_plugin_str = buf; 3652 /* 3653 * Special case for subsystem plugins that have "_" in their names. 3654 * Namely rd_direct and rd_mcp.. 3655 */ 3656 str2 = strstr(str+1, "_"); 3657 if (str2) { 3658 *str2 = '\0'; /* Terminate for *se_plugin_str */ 3659 str2++; /* Skip to start of plugin dependent ID */ 3660 str = str2; 3661 } else { 3662 *str = '\0'; /* Terminate for *se_plugin_str */ 3663 str++; /* Skip to start of plugin dependent ID */ 3664 } 3665 3666 ret = kstrtoul(str, 0, &plugin_dep_id); 3667 if (ret < 0) { 3668 pr_err("kstrtoul() returned %d for" 3669 " plugin_dep_id\n", ret); 3670 return ERR_PTR(ret); 3671 } 3672 /* 3673 * Load up TCM subsystem plugins if they have not already been loaded. 3674 */ 3675 transport_subsystem_check_init(); 3676 3677 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 3678 if (IS_ERR(hba)) 3679 return ERR_CAST(hba); 3680 3681 config_group_init_type_name(&hba->hba_group, name, 3682 &target_core_hba_cit); 3683 3684 return &hba->hba_group; 3685 } 3686 3687 static void target_core_call_delhbafromtarget( 3688 struct config_group *group, 3689 struct config_item *item) 3690 { 3691 /* 3692 * core_delete_hba() is called from target_core_hba_item_ops->release() 3693 * -> target_core_hba_release() 3694 */ 3695 config_item_put(item); 3696 } 3697 3698 static const struct configfs_group_operations target_core_group_ops = { 3699 .make_group = target_core_call_addhbatotarget, 3700 .drop_item = target_core_call_delhbafromtarget, 3701 }; 3702 3703 static const struct config_item_type target_core_cit = { 3704 .ct_item_ops = NULL, 3705 .ct_group_ops = &target_core_group_ops, 3706 .ct_attrs = NULL, 3707 .ct_owner = THIS_MODULE, 3708 }; 3709 3710 /* Stop functions for struct config_item_type target_core_hba_cit */ 3711 3712 void target_setup_backend_cits(struct target_backend *tb) 3713 { 3714 target_core_setup_dev_cit(tb); 3715 target_core_setup_dev_action_cit(tb); 3716 target_core_setup_dev_attrib_cit(tb); 3717 target_core_setup_dev_pr_cit(tb); 3718 target_core_setup_dev_wwn_cit(tb); 3719 target_core_setup_dev_alua_tg_pt_gps_cit(tb); 3720 target_core_setup_dev_stat_cit(tb); 3721 } 3722 3723 static void target_init_dbroot(void) 3724 { 3725 struct file *fp; 3726 3727 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED); 3728 fp = filp_open(db_root_stage, O_RDONLY, 0); 3729 if (IS_ERR(fp)) { 3730 pr_err("db_root: cannot open: %s\n", db_root_stage); 3731 return; 3732 } 3733 if (!S_ISDIR(file_inode(fp)->i_mode)) { 3734 filp_close(fp, NULL); 3735 pr_err("db_root: not a valid directory: %s\n", db_root_stage); 3736 return; 3737 } 3738 filp_close(fp, NULL); 3739 3740 strscpy(db_root, db_root_stage); 3741 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); 3742 } 3743 3744 static int __init target_core_init_configfs(void) 3745 { 3746 struct configfs_subsystem *subsys = &target_core_fabrics; 3747 struct t10_alua_lu_gp *lu_gp; 3748 int ret; 3749 3750 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 3751 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3752 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3753 3754 config_group_init(&subsys->su_group); 3755 mutex_init(&subsys->su_mutex); 3756 3757 ret = init_se_kmem_caches(); 3758 if (ret < 0) 3759 return ret; 3760 /* 3761 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3762 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3763 */ 3764 config_group_init_type_name(&target_core_hbagroup, "core", 3765 &target_core_cit); 3766 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group); 3767 3768 /* 3769 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3770 */ 3771 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit); 3772 configfs_add_default_group(&alua_group, &target_core_hbagroup); 3773 3774 /* 3775 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3776 * groups under /sys/kernel/config/target/core/alua/ 3777 */ 3778 config_group_init_type_name(&alua_lu_gps_group, "lu_gps", 3779 &target_core_alua_lu_gps_cit); 3780 configfs_add_default_group(&alua_lu_gps_group, &alua_group); 3781 3782 /* 3783 * Add core/alua/lu_gps/default_lu_gp 3784 */ 3785 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3786 if (IS_ERR(lu_gp)) { 3787 ret = -ENOMEM; 3788 goto out_global; 3789 } 3790 3791 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3792 &target_core_alua_lu_gp_cit); 3793 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group); 3794 3795 default_lu_gp = lu_gp; 3796 3797 /* 3798 * Register the target_core_mod subsystem with configfs. 3799 */ 3800 ret = configfs_register_subsystem(subsys); 3801 if (ret < 0) { 3802 pr_err("Error %d while registering subsystem %s\n", 3803 ret, subsys->su_group.cg_item.ci_namebuf); 3804 goto out_global; 3805 } 3806 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 3807 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s" 3808 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3809 /* 3810 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3811 */ 3812 ret = rd_module_init(); 3813 if (ret < 0) 3814 goto out; 3815 3816 ret = core_dev_setup_virtual_lun0(); 3817 if (ret < 0) 3818 goto out; 3819 3820 ret = target_xcopy_setup_pt(); 3821 if (ret < 0) 3822 goto out; 3823 3824 scoped_with_kernel_creds() 3825 target_init_dbroot(); 3826 3827 return 0; 3828 3829 out: 3830 target_xcopy_release_pt(); 3831 configfs_unregister_subsystem(subsys); 3832 core_dev_release_virtual_lun0(); 3833 rd_module_exit(); 3834 out_global: 3835 if (default_lu_gp) { 3836 core_alua_free_lu_gp(default_lu_gp); 3837 default_lu_gp = NULL; 3838 } 3839 release_se_kmem_caches(); 3840 return ret; 3841 } 3842 3843 static void __exit target_core_exit_configfs(void) 3844 { 3845 configfs_remove_default_groups(&alua_lu_gps_group); 3846 configfs_remove_default_groups(&alua_group); 3847 configfs_remove_default_groups(&target_core_hbagroup); 3848 3849 /* 3850 * We expect subsys->su_group.default_groups to be released 3851 * by configfs subsystem provider logic.. 3852 */ 3853 configfs_unregister_subsystem(&target_core_fabrics); 3854 3855 core_alua_free_lu_gp(default_lu_gp); 3856 default_lu_gp = NULL; 3857 3858 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3859 " Infrastructure\n"); 3860 3861 core_dev_release_virtual_lun0(); 3862 rd_module_exit(); 3863 target_xcopy_release_pt(); 3864 release_se_kmem_caches(); 3865 } 3866 3867 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3868 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3869 MODULE_LICENSE("GPL"); 3870 3871 module_init(target_core_init_configfs); 3872 module_exit(target_core_exit_configfs); 3873