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/module.h> 16 #include <linux/moduleparam.h> 17 #include <generated/utsrelease.h> 18 #include <linux/utsname.h> 19 #include <linux/init.h> 20 #include <linux/fs.h> 21 #include <linux/namei.h> 22 #include <linux/slab.h> 23 #include <linux/types.h> 24 #include <linux/delay.h> 25 #include <linux/unistd.h> 26 #include <linux/string.h> 27 #include <linux/parser.h> 28 #include <linux/syscalls.h> 29 #include <linux/configfs.h> 30 #include <linux/spinlock.h> 31 32 #include <target/target_core_base.h> 33 #include <target/target_core_backend.h> 34 #include <target/target_core_fabric.h> 35 36 #include "target_core_internal.h" 37 #include "target_core_alua.h" 38 #include "target_core_pr.h" 39 #include "target_core_rd.h" 40 #include "target_core_xcopy.h" 41 42 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \ 43 static void target_core_setup_##_name##_cit(struct target_backend *tb) \ 44 { \ 45 struct config_item_type *cit = &tb->tb_##_name##_cit; \ 46 \ 47 cit->ct_item_ops = _item_ops; \ 48 cit->ct_group_ops = _group_ops; \ 49 cit->ct_attrs = _attrs; \ 50 cit->ct_owner = tb->ops->owner; \ 51 pr_debug("Setup generic %s\n", __stringify(_name)); \ 52 } 53 54 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \ 55 static void target_core_setup_##_name##_cit(struct target_backend *tb) \ 56 { \ 57 struct config_item_type *cit = &tb->tb_##_name##_cit; \ 58 \ 59 cit->ct_item_ops = _item_ops; \ 60 cit->ct_group_ops = _group_ops; \ 61 cit->ct_attrs = tb->ops->tb_##_name##_attrs; \ 62 cit->ct_owner = tb->ops->owner; \ 63 pr_debug("Setup generic %s\n", __stringify(_name)); \ 64 } 65 66 extern struct t10_alua_lu_gp *default_lu_gp; 67 68 static LIST_HEAD(g_tf_list); 69 static DEFINE_MUTEX(g_tf_lock); 70 71 static struct config_group target_core_hbagroup; 72 static struct config_group alua_group; 73 static struct config_group alua_lu_gps_group; 74 75 static inline struct se_hba * 76 item_to_hba(struct config_item *item) 77 { 78 return container_of(to_config_group(item), struct se_hba, hba_group); 79 } 80 81 /* 82 * Attributes for /sys/kernel/config/target/ 83 */ 84 static ssize_t target_core_item_version_show(struct config_item *item, 85 char *page) 86 { 87 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s" 88 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION, 89 utsname()->sysname, utsname()->machine); 90 } 91 92 CONFIGFS_ATTR_RO(target_core_item_, version); 93 94 char db_root[DB_ROOT_LEN] = DB_ROOT_DEFAULT; 95 static char db_root_stage[DB_ROOT_LEN]; 96 97 static ssize_t target_core_item_dbroot_show(struct config_item *item, 98 char *page) 99 { 100 return sprintf(page, "%s\n", db_root); 101 } 102 103 static ssize_t target_core_item_dbroot_store(struct config_item *item, 104 const char *page, size_t count) 105 { 106 ssize_t read_bytes; 107 struct file *fp; 108 109 mutex_lock(&g_tf_lock); 110 if (!list_empty(&g_tf_list)) { 111 mutex_unlock(&g_tf_lock); 112 pr_err("db_root: cannot be changed: target drivers registered"); 113 return -EINVAL; 114 } 115 116 if (count > (DB_ROOT_LEN - 1)) { 117 mutex_unlock(&g_tf_lock); 118 pr_err("db_root: count %d exceeds DB_ROOT_LEN-1: %u\n", 119 (int)count, DB_ROOT_LEN - 1); 120 return -EINVAL; 121 } 122 123 read_bytes = snprintf(db_root_stage, DB_ROOT_LEN, "%s", page); 124 if (!read_bytes) { 125 mutex_unlock(&g_tf_lock); 126 return -EINVAL; 127 } 128 if (db_root_stage[read_bytes - 1] == '\n') 129 db_root_stage[read_bytes - 1] = '\0'; 130 131 /* validate new db root before accepting it */ 132 fp = filp_open(db_root_stage, O_RDONLY, 0); 133 if (IS_ERR(fp)) { 134 mutex_unlock(&g_tf_lock); 135 pr_err("db_root: cannot open: %s\n", db_root_stage); 136 return -EINVAL; 137 } 138 if (!S_ISDIR(file_inode(fp)->i_mode)) { 139 filp_close(fp, NULL); 140 mutex_unlock(&g_tf_lock); 141 pr_err("db_root: not a directory: %s\n", db_root_stage); 142 return -EINVAL; 143 } 144 filp_close(fp, NULL); 145 146 strncpy(db_root, db_root_stage, read_bytes); 147 148 mutex_unlock(&g_tf_lock); 149 150 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); 151 152 return read_bytes; 153 } 154 155 CONFIGFS_ATTR(target_core_item_, dbroot); 156 157 static struct target_fabric_configfs *target_core_get_fabric( 158 const char *name) 159 { 160 struct target_fabric_configfs *tf; 161 162 if (!name) 163 return NULL; 164 165 mutex_lock(&g_tf_lock); 166 list_for_each_entry(tf, &g_tf_list, tf_list) { 167 const char *cmp_name = tf->tf_ops->fabric_alias; 168 if (!cmp_name) 169 cmp_name = tf->tf_ops->fabric_name; 170 if (!strcmp(cmp_name, name)) { 171 atomic_inc(&tf->tf_access_cnt); 172 mutex_unlock(&g_tf_lock); 173 return tf; 174 } 175 } 176 mutex_unlock(&g_tf_lock); 177 178 return NULL; 179 } 180 181 /* 182 * Called from struct target_core_group_ops->make_group() 183 */ 184 static struct config_group *target_core_register_fabric( 185 struct config_group *group, 186 const char *name) 187 { 188 struct target_fabric_configfs *tf; 189 int ret; 190 191 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:" 192 " %s\n", group, name); 193 194 tf = target_core_get_fabric(name); 195 if (!tf) { 196 pr_debug("target_core_register_fabric() trying autoload for %s\n", 197 name); 198 199 /* 200 * Below are some hardcoded request_module() calls to automatically 201 * local fabric modules when the following is called: 202 * 203 * mkdir -p /sys/kernel/config/target/$MODULE_NAME 204 * 205 * Note that this does not limit which TCM fabric module can be 206 * registered, but simply provids auto loading logic for modules with 207 * mkdir(2) system calls with known TCM fabric modules. 208 */ 209 210 if (!strncmp(name, "iscsi", 5)) { 211 /* 212 * Automatically load the LIO Target fabric module when the 213 * following is called: 214 * 215 * mkdir -p $CONFIGFS/target/iscsi 216 */ 217 ret = request_module("iscsi_target_mod"); 218 if (ret < 0) { 219 pr_debug("request_module() failed for" 220 " iscsi_target_mod.ko: %d\n", ret); 221 return ERR_PTR(-EINVAL); 222 } 223 } else if (!strncmp(name, "loopback", 8)) { 224 /* 225 * Automatically load the tcm_loop fabric module when the 226 * following is called: 227 * 228 * mkdir -p $CONFIGFS/target/loopback 229 */ 230 ret = request_module("tcm_loop"); 231 if (ret < 0) { 232 pr_debug("request_module() failed for" 233 " tcm_loop.ko: %d\n", ret); 234 return ERR_PTR(-EINVAL); 235 } 236 } 237 238 tf = target_core_get_fabric(name); 239 } 240 241 if (!tf) { 242 pr_debug("target_core_get_fabric() failed for %s\n", 243 name); 244 return ERR_PTR(-EINVAL); 245 } 246 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:" 247 " %s\n", tf->tf_ops->fabric_name); 248 /* 249 * On a successful target_core_get_fabric() look, the returned 250 * struct target_fabric_configfs *tf will contain a usage reference. 251 */ 252 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n", 253 &tf->tf_wwn_cit); 254 255 config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit); 256 257 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth", 258 &tf->tf_discovery_cit); 259 configfs_add_default_group(&tf->tf_disc_group, &tf->tf_group); 260 261 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric: %s\n", 262 config_item_name(&tf->tf_group.cg_item)); 263 return &tf->tf_group; 264 } 265 266 /* 267 * Called from struct target_core_group_ops->drop_item() 268 */ 269 static void target_core_deregister_fabric( 270 struct config_group *group, 271 struct config_item *item) 272 { 273 struct target_fabric_configfs *tf = container_of( 274 to_config_group(item), struct target_fabric_configfs, tf_group); 275 276 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in" 277 " tf list\n", config_item_name(item)); 278 279 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:" 280 " %s\n", tf->tf_ops->fabric_name); 281 atomic_dec(&tf->tf_access_cnt); 282 283 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci" 284 " %s\n", config_item_name(item)); 285 286 configfs_remove_default_groups(&tf->tf_group); 287 config_item_put(item); 288 } 289 290 static struct configfs_group_operations target_core_fabric_group_ops = { 291 .make_group = &target_core_register_fabric, 292 .drop_item = &target_core_deregister_fabric, 293 }; 294 295 /* 296 * All item attributes appearing in /sys/kernel/target/ appear here. 297 */ 298 static struct configfs_attribute *target_core_fabric_item_attrs[] = { 299 &target_core_item_attr_version, 300 &target_core_item_attr_dbroot, 301 NULL, 302 }; 303 304 /* 305 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/ 306 */ 307 static const struct config_item_type target_core_fabrics_item = { 308 .ct_group_ops = &target_core_fabric_group_ops, 309 .ct_attrs = target_core_fabric_item_attrs, 310 .ct_owner = THIS_MODULE, 311 }; 312 313 static struct configfs_subsystem target_core_fabrics = { 314 .su_group = { 315 .cg_item = { 316 .ci_namebuf = "target", 317 .ci_type = &target_core_fabrics_item, 318 }, 319 }, 320 }; 321 322 int target_depend_item(struct config_item *item) 323 { 324 return configfs_depend_item(&target_core_fabrics, item); 325 } 326 EXPORT_SYMBOL(target_depend_item); 327 328 void target_undepend_item(struct config_item *item) 329 { 330 return configfs_undepend_item(item); 331 } 332 EXPORT_SYMBOL(target_undepend_item); 333 334 /*############################################################################## 335 // Start functions called by external Target Fabrics Modules 336 //############################################################################*/ 337 338 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo) 339 { 340 if (tfo->fabric_alias) { 341 if (strlen(tfo->fabric_alias) >= TARGET_FABRIC_NAME_SIZE) { 342 pr_err("Passed alias: %s exceeds " 343 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_alias); 344 return -EINVAL; 345 } 346 } 347 if (!tfo->fabric_name) { 348 pr_err("Missing tfo->fabric_name\n"); 349 return -EINVAL; 350 } 351 if (strlen(tfo->fabric_name) >= TARGET_FABRIC_NAME_SIZE) { 352 pr_err("Passed name: %s exceeds " 353 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_name); 354 return -EINVAL; 355 } 356 if (!tfo->tpg_get_wwn) { 357 pr_err("Missing tfo->tpg_get_wwn()\n"); 358 return -EINVAL; 359 } 360 if (!tfo->tpg_get_tag) { 361 pr_err("Missing tfo->tpg_get_tag()\n"); 362 return -EINVAL; 363 } 364 if (!tfo->tpg_check_demo_mode) { 365 pr_err("Missing tfo->tpg_check_demo_mode()\n"); 366 return -EINVAL; 367 } 368 if (!tfo->tpg_check_demo_mode_cache) { 369 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n"); 370 return -EINVAL; 371 } 372 if (!tfo->tpg_check_demo_mode_write_protect) { 373 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n"); 374 return -EINVAL; 375 } 376 if (!tfo->tpg_check_prod_mode_write_protect) { 377 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n"); 378 return -EINVAL; 379 } 380 if (!tfo->tpg_get_inst_index) { 381 pr_err("Missing tfo->tpg_get_inst_index()\n"); 382 return -EINVAL; 383 } 384 if (!tfo->release_cmd) { 385 pr_err("Missing tfo->release_cmd()\n"); 386 return -EINVAL; 387 } 388 if (!tfo->sess_get_index) { 389 pr_err("Missing tfo->sess_get_index()\n"); 390 return -EINVAL; 391 } 392 if (!tfo->write_pending) { 393 pr_err("Missing tfo->write_pending()\n"); 394 return -EINVAL; 395 } 396 if (!tfo->set_default_node_attributes) { 397 pr_err("Missing tfo->set_default_node_attributes()\n"); 398 return -EINVAL; 399 } 400 if (!tfo->get_cmd_state) { 401 pr_err("Missing tfo->get_cmd_state()\n"); 402 return -EINVAL; 403 } 404 if (!tfo->queue_data_in) { 405 pr_err("Missing tfo->queue_data_in()\n"); 406 return -EINVAL; 407 } 408 if (!tfo->queue_status) { 409 pr_err("Missing tfo->queue_status()\n"); 410 return -EINVAL; 411 } 412 if (!tfo->queue_tm_rsp) { 413 pr_err("Missing tfo->queue_tm_rsp()\n"); 414 return -EINVAL; 415 } 416 if (!tfo->aborted_task) { 417 pr_err("Missing tfo->aborted_task()\n"); 418 return -EINVAL; 419 } 420 if (!tfo->check_stop_free) { 421 pr_err("Missing tfo->check_stop_free()\n"); 422 return -EINVAL; 423 } 424 /* 425 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn() 426 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in 427 * target_core_fabric_configfs.c WWN+TPG group context code. 428 */ 429 if (!tfo->fabric_make_wwn) { 430 pr_err("Missing tfo->fabric_make_wwn()\n"); 431 return -EINVAL; 432 } 433 if (!tfo->fabric_drop_wwn) { 434 pr_err("Missing tfo->fabric_drop_wwn()\n"); 435 return -EINVAL; 436 } 437 if (!tfo->fabric_make_tpg) { 438 pr_err("Missing tfo->fabric_make_tpg()\n"); 439 return -EINVAL; 440 } 441 if (!tfo->fabric_drop_tpg) { 442 pr_err("Missing tfo->fabric_drop_tpg()\n"); 443 return -EINVAL; 444 } 445 446 return 0; 447 } 448 449 int target_register_template(const struct target_core_fabric_ops *fo) 450 { 451 struct target_fabric_configfs *tf; 452 int ret; 453 454 ret = target_fabric_tf_ops_check(fo); 455 if (ret) 456 return ret; 457 458 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL); 459 if (!tf) { 460 pr_err("%s: could not allocate memory!\n", __func__); 461 return -ENOMEM; 462 } 463 464 INIT_LIST_HEAD(&tf->tf_list); 465 atomic_set(&tf->tf_access_cnt, 0); 466 tf->tf_ops = fo; 467 target_fabric_setup_cits(tf); 468 469 mutex_lock(&g_tf_lock); 470 list_add_tail(&tf->tf_list, &g_tf_list); 471 mutex_unlock(&g_tf_lock); 472 473 return 0; 474 } 475 EXPORT_SYMBOL(target_register_template); 476 477 void target_unregister_template(const struct target_core_fabric_ops *fo) 478 { 479 struct target_fabric_configfs *t; 480 481 mutex_lock(&g_tf_lock); 482 list_for_each_entry(t, &g_tf_list, tf_list) { 483 if (!strcmp(t->tf_ops->fabric_name, fo->fabric_name)) { 484 BUG_ON(atomic_read(&t->tf_access_cnt)); 485 list_del(&t->tf_list); 486 mutex_unlock(&g_tf_lock); 487 /* 488 * Wait for any outstanding fabric se_deve_entry->rcu_head 489 * callbacks to complete post kfree_rcu(), before allowing 490 * fabric driver unload of TFO->module to proceed. 491 */ 492 rcu_barrier(); 493 kfree(t); 494 return; 495 } 496 } 497 mutex_unlock(&g_tf_lock); 498 } 499 EXPORT_SYMBOL(target_unregister_template); 500 501 /*############################################################################## 502 // Stop functions called by external Target Fabrics Modules 503 //############################################################################*/ 504 505 static inline struct se_dev_attrib *to_attrib(struct config_item *item) 506 { 507 return container_of(to_config_group(item), struct se_dev_attrib, 508 da_group); 509 } 510 511 /* Start functions for struct config_item_type tb_dev_attrib_cit */ 512 #define DEF_CONFIGFS_ATTRIB_SHOW(_name) \ 513 static ssize_t _name##_show(struct config_item *item, char *page) \ 514 { \ 515 return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \ 516 } 517 518 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias); 519 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo); 520 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write); 521 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read); 522 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache); 523 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl); 524 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas); 525 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu); 526 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws); 527 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw); 528 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc); 529 DEF_CONFIGFS_ATTRIB_SHOW(emulate_pr); 530 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type); 531 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type); 532 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify); 533 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids); 534 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot); 535 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord); 536 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl); 537 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size); 538 DEF_CONFIGFS_ATTRIB_SHOW(block_size); 539 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors); 540 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors); 541 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth); 542 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth); 543 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count); 544 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count); 545 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity); 546 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment); 547 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data); 548 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len); 549 550 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \ 551 static ssize_t _name##_store(struct config_item *item, const char *page,\ 552 size_t count) \ 553 { \ 554 struct se_dev_attrib *da = to_attrib(item); \ 555 u32 val; \ 556 int ret; \ 557 \ 558 ret = kstrtou32(page, 0, &val); \ 559 if (ret < 0) \ 560 return ret; \ 561 da->_name = val; \ 562 return count; \ 563 } 564 565 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count); 566 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count); 567 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity); 568 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment); 569 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len); 570 571 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \ 572 static ssize_t _name##_store(struct config_item *item, const char *page, \ 573 size_t count) \ 574 { \ 575 struct se_dev_attrib *da = to_attrib(item); \ 576 bool flag; \ 577 int ret; \ 578 \ 579 ret = strtobool(page, &flag); \ 580 if (ret < 0) \ 581 return ret; \ 582 da->_name = flag; \ 583 return count; \ 584 } 585 586 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write); 587 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw); 588 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc); 589 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr); 590 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids); 591 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot); 592 593 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \ 594 static ssize_t _name##_store(struct config_item *item, const char *page,\ 595 size_t count) \ 596 { \ 597 printk_once(KERN_WARNING \ 598 "ignoring deprecated %s attribute\n", \ 599 __stringify(_name)); \ 600 return count; \ 601 } 602 603 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo); 604 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read); 605 606 static void dev_set_t10_wwn_model_alias(struct se_device *dev) 607 { 608 const char *configname; 609 610 configname = config_item_name(&dev->dev_group.cg_item); 611 if (strlen(configname) >= INQUIRY_MODEL_LEN) { 612 pr_warn("dev[%p]: Backstore name '%s' is too long for " 613 "INQUIRY_MODEL, truncating to 15 characters\n", dev, 614 configname); 615 } 616 /* 617 * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1) 618 * here without potentially breaking existing setups, so continue to 619 * truncate one byte shorter than what can be carried in INQUIRY. 620 */ 621 strlcpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN); 622 } 623 624 static ssize_t emulate_model_alias_store(struct config_item *item, 625 const char *page, size_t count) 626 { 627 struct se_dev_attrib *da = to_attrib(item); 628 struct se_device *dev = da->da_dev; 629 bool flag; 630 int ret; 631 632 if (dev->export_count) { 633 pr_err("dev[%p]: Unable to change model alias" 634 " while export_count is %d\n", 635 dev, dev->export_count); 636 return -EINVAL; 637 } 638 639 ret = strtobool(page, &flag); 640 if (ret < 0) 641 return ret; 642 643 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); 644 if (flag) { 645 dev_set_t10_wwn_model_alias(dev); 646 } else { 647 strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod, 648 sizeof(dev->t10_wwn.model)); 649 } 650 da->emulate_model_alias = flag; 651 return count; 652 } 653 654 static ssize_t emulate_write_cache_store(struct config_item *item, 655 const char *page, size_t count) 656 { 657 struct se_dev_attrib *da = to_attrib(item); 658 bool flag; 659 int ret; 660 661 ret = strtobool(page, &flag); 662 if (ret < 0) 663 return ret; 664 665 if (flag && da->da_dev->transport->get_write_cache) { 666 pr_err("emulate_write_cache not supported for this device\n"); 667 return -EINVAL; 668 } 669 670 da->emulate_write_cache = flag; 671 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 672 da->da_dev, flag); 673 return count; 674 } 675 676 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item, 677 const char *page, size_t count) 678 { 679 struct se_dev_attrib *da = to_attrib(item); 680 u32 val; 681 int ret; 682 683 ret = kstrtou32(page, 0, &val); 684 if (ret < 0) 685 return ret; 686 687 if (val != TARGET_UA_INTLCK_CTRL_CLEAR 688 && val != TARGET_UA_INTLCK_CTRL_NO_CLEAR 689 && val != TARGET_UA_INTLCK_CTRL_ESTABLISH_UA) { 690 pr_err("Illegal value %d\n", val); 691 return -EINVAL; 692 } 693 694 if (da->da_dev->export_count) { 695 pr_err("dev[%p]: Unable to change SE Device" 696 " UA_INTRLCK_CTRL while export_count is %d\n", 697 da->da_dev, da->da_dev->export_count); 698 return -EINVAL; 699 } 700 da->emulate_ua_intlck_ctrl = val; 701 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 702 da->da_dev, val); 703 return count; 704 } 705 706 static ssize_t emulate_tas_store(struct config_item *item, 707 const char *page, size_t count) 708 { 709 struct se_dev_attrib *da = to_attrib(item); 710 bool flag; 711 int ret; 712 713 ret = strtobool(page, &flag); 714 if (ret < 0) 715 return ret; 716 717 if (da->da_dev->export_count) { 718 pr_err("dev[%p]: Unable to change SE Device TAS while" 719 " export_count is %d\n", 720 da->da_dev, da->da_dev->export_count); 721 return -EINVAL; 722 } 723 da->emulate_tas = flag; 724 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 725 da->da_dev, flag ? "Enabled" : "Disabled"); 726 727 return count; 728 } 729 730 static ssize_t emulate_tpu_store(struct config_item *item, 731 const char *page, size_t count) 732 { 733 struct se_dev_attrib *da = to_attrib(item); 734 bool flag; 735 int ret; 736 737 ret = strtobool(page, &flag); 738 if (ret < 0) 739 return ret; 740 741 /* 742 * We expect this value to be non-zero when generic Block Layer 743 * Discard supported is detected iblock_create_virtdevice(). 744 */ 745 if (flag && !da->max_unmap_block_desc_count) { 746 pr_err("Generic Block Discard not supported\n"); 747 return -ENOSYS; 748 } 749 750 da->emulate_tpu = flag; 751 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 752 da->da_dev, flag); 753 return count; 754 } 755 756 static ssize_t emulate_tpws_store(struct config_item *item, 757 const char *page, size_t count) 758 { 759 struct se_dev_attrib *da = to_attrib(item); 760 bool flag; 761 int ret; 762 763 ret = strtobool(page, &flag); 764 if (ret < 0) 765 return ret; 766 767 /* 768 * We expect this value to be non-zero when generic Block Layer 769 * Discard supported is detected iblock_create_virtdevice(). 770 */ 771 if (flag && !da->max_unmap_block_desc_count) { 772 pr_err("Generic Block Discard not supported\n"); 773 return -ENOSYS; 774 } 775 776 da->emulate_tpws = flag; 777 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 778 da->da_dev, flag); 779 return count; 780 } 781 782 static ssize_t pi_prot_type_store(struct config_item *item, 783 const char *page, size_t count) 784 { 785 struct se_dev_attrib *da = to_attrib(item); 786 int old_prot = da->pi_prot_type, ret; 787 struct se_device *dev = da->da_dev; 788 u32 flag; 789 790 ret = kstrtou32(page, 0, &flag); 791 if (ret < 0) 792 return ret; 793 794 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) { 795 pr_err("Illegal value %d for pi_prot_type\n", flag); 796 return -EINVAL; 797 } 798 if (flag == 2) { 799 pr_err("DIF TYPE2 protection currently not supported\n"); 800 return -ENOSYS; 801 } 802 if (da->hw_pi_prot_type) { 803 pr_warn("DIF protection enabled on underlying hardware," 804 " ignoring\n"); 805 return count; 806 } 807 if (!dev->transport->init_prot || !dev->transport->free_prot) { 808 /* 0 is only allowed value for non-supporting backends */ 809 if (flag == 0) 810 return count; 811 812 pr_err("DIF protection not supported by backend: %s\n", 813 dev->transport->name); 814 return -ENOSYS; 815 } 816 if (!target_dev_configured(dev)) { 817 pr_err("DIF protection requires device to be configured\n"); 818 return -ENODEV; 819 } 820 if (dev->export_count) { 821 pr_err("dev[%p]: Unable to change SE Device PROT type while" 822 " export_count is %d\n", dev, dev->export_count); 823 return -EINVAL; 824 } 825 826 da->pi_prot_type = flag; 827 828 if (flag && !old_prot) { 829 ret = dev->transport->init_prot(dev); 830 if (ret) { 831 da->pi_prot_type = old_prot; 832 da->pi_prot_verify = (bool) da->pi_prot_type; 833 return ret; 834 } 835 836 } else if (!flag && old_prot) { 837 dev->transport->free_prot(dev); 838 } 839 840 da->pi_prot_verify = (bool) da->pi_prot_type; 841 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag); 842 return count; 843 } 844 845 /* always zero, but attr needs to remain RW to avoid userspace breakage */ 846 static ssize_t pi_prot_format_show(struct config_item *item, char *page) 847 { 848 return snprintf(page, PAGE_SIZE, "0\n"); 849 } 850 851 static ssize_t pi_prot_format_store(struct config_item *item, 852 const char *page, size_t count) 853 { 854 struct se_dev_attrib *da = to_attrib(item); 855 struct se_device *dev = da->da_dev; 856 bool flag; 857 int ret; 858 859 ret = strtobool(page, &flag); 860 if (ret < 0) 861 return ret; 862 863 if (!flag) 864 return count; 865 866 if (!dev->transport->format_prot) { 867 pr_err("DIF protection format not supported by backend %s\n", 868 dev->transport->name); 869 return -ENOSYS; 870 } 871 if (!target_dev_configured(dev)) { 872 pr_err("DIF protection format requires device to be configured\n"); 873 return -ENODEV; 874 } 875 if (dev->export_count) { 876 pr_err("dev[%p]: Unable to format SE Device PROT type while" 877 " export_count is %d\n", dev, dev->export_count); 878 return -EINVAL; 879 } 880 881 ret = dev->transport->format_prot(dev); 882 if (ret) 883 return ret; 884 885 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev); 886 return count; 887 } 888 889 static ssize_t pi_prot_verify_store(struct config_item *item, 890 const char *page, size_t count) 891 { 892 struct se_dev_attrib *da = to_attrib(item); 893 bool flag; 894 int ret; 895 896 ret = strtobool(page, &flag); 897 if (ret < 0) 898 return ret; 899 900 if (!flag) { 901 da->pi_prot_verify = flag; 902 return count; 903 } 904 if (da->hw_pi_prot_type) { 905 pr_warn("DIF protection enabled on underlying hardware," 906 " ignoring\n"); 907 return count; 908 } 909 if (!da->pi_prot_type) { 910 pr_warn("DIF protection not supported by backend, ignoring\n"); 911 return count; 912 } 913 da->pi_prot_verify = flag; 914 915 return count; 916 } 917 918 static ssize_t force_pr_aptpl_store(struct config_item *item, 919 const char *page, size_t count) 920 { 921 struct se_dev_attrib *da = to_attrib(item); 922 bool flag; 923 int ret; 924 925 ret = strtobool(page, &flag); 926 if (ret < 0) 927 return ret; 928 if (da->da_dev->export_count) { 929 pr_err("dev[%p]: Unable to set force_pr_aptpl while" 930 " export_count is %d\n", 931 da->da_dev, da->da_dev->export_count); 932 return -EINVAL; 933 } 934 935 da->force_pr_aptpl = flag; 936 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag); 937 return count; 938 } 939 940 static ssize_t emulate_rest_reord_store(struct config_item *item, 941 const char *page, size_t count) 942 { 943 struct se_dev_attrib *da = to_attrib(item); 944 bool flag; 945 int ret; 946 947 ret = strtobool(page, &flag); 948 if (ret < 0) 949 return ret; 950 951 if (flag != 0) { 952 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted" 953 " reordering not implemented\n", da->da_dev); 954 return -ENOSYS; 955 } 956 da->emulate_rest_reord = flag; 957 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", 958 da->da_dev, flag); 959 return count; 960 } 961 962 static ssize_t unmap_zeroes_data_store(struct config_item *item, 963 const char *page, size_t count) 964 { 965 struct se_dev_attrib *da = to_attrib(item); 966 bool flag; 967 int ret; 968 969 ret = strtobool(page, &flag); 970 if (ret < 0) 971 return ret; 972 973 if (da->da_dev->export_count) { 974 pr_err("dev[%p]: Unable to change SE Device" 975 " unmap_zeroes_data while export_count is %d\n", 976 da->da_dev, da->da_dev->export_count); 977 return -EINVAL; 978 } 979 /* 980 * We expect this value to be non-zero when generic Block Layer 981 * Discard supported is detected iblock_configure_device(). 982 */ 983 if (flag && !da->max_unmap_block_desc_count) { 984 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set" 985 " because max_unmap_block_desc_count is zero\n", 986 da->da_dev); 987 return -ENOSYS; 988 } 989 da->unmap_zeroes_data = flag; 990 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n", 991 da->da_dev, flag); 992 return count; 993 } 994 995 /* 996 * Note, this can only be called on unexported SE Device Object. 997 */ 998 static ssize_t queue_depth_store(struct config_item *item, 999 const char *page, size_t count) 1000 { 1001 struct se_dev_attrib *da = to_attrib(item); 1002 struct se_device *dev = da->da_dev; 1003 u32 val; 1004 int ret; 1005 1006 ret = kstrtou32(page, 0, &val); 1007 if (ret < 0) 1008 return ret; 1009 1010 if (dev->export_count) { 1011 pr_err("dev[%p]: Unable to change SE Device TCQ while" 1012 " export_count is %d\n", 1013 dev, dev->export_count); 1014 return -EINVAL; 1015 } 1016 if (!val) { 1017 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev); 1018 return -EINVAL; 1019 } 1020 1021 if (val > dev->dev_attrib.queue_depth) { 1022 if (val > dev->dev_attrib.hw_queue_depth) { 1023 pr_err("dev[%p]: Passed queue_depth:" 1024 " %u exceeds TCM/SE_Device MAX" 1025 " TCQ: %u\n", dev, val, 1026 dev->dev_attrib.hw_queue_depth); 1027 return -EINVAL; 1028 } 1029 } 1030 da->queue_depth = dev->queue_depth = val; 1031 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val); 1032 return count; 1033 } 1034 1035 static ssize_t optimal_sectors_store(struct config_item *item, 1036 const char *page, size_t count) 1037 { 1038 struct se_dev_attrib *da = to_attrib(item); 1039 u32 val; 1040 int ret; 1041 1042 ret = kstrtou32(page, 0, &val); 1043 if (ret < 0) 1044 return ret; 1045 1046 if (da->da_dev->export_count) { 1047 pr_err("dev[%p]: Unable to change SE Device" 1048 " optimal_sectors while export_count is %d\n", 1049 da->da_dev, da->da_dev->export_count); 1050 return -EINVAL; 1051 } 1052 if (val > da->hw_max_sectors) { 1053 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1054 " greater than hw_max_sectors: %u\n", 1055 da->da_dev, val, da->hw_max_sectors); 1056 return -EINVAL; 1057 } 1058 1059 da->optimal_sectors = val; 1060 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1061 da->da_dev, val); 1062 return count; 1063 } 1064 1065 static ssize_t block_size_store(struct config_item *item, 1066 const char *page, size_t count) 1067 { 1068 struct se_dev_attrib *da = to_attrib(item); 1069 u32 val; 1070 int ret; 1071 1072 ret = kstrtou32(page, 0, &val); 1073 if (ret < 0) 1074 return ret; 1075 1076 if (da->da_dev->export_count) { 1077 pr_err("dev[%p]: Unable to change SE Device block_size" 1078 " while export_count is %d\n", 1079 da->da_dev, da->da_dev->export_count); 1080 return -EINVAL; 1081 } 1082 1083 if (val != 512 && val != 1024 && val != 2048 && val != 4096) { 1084 pr_err("dev[%p]: Illegal value for block_device: %u" 1085 " for SE device, must be 512, 1024, 2048 or 4096\n", 1086 da->da_dev, val); 1087 return -EINVAL; 1088 } 1089 1090 da->block_size = val; 1091 if (da->max_bytes_per_io) 1092 da->hw_max_sectors = da->max_bytes_per_io / val; 1093 1094 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1095 da->da_dev, val); 1096 return count; 1097 } 1098 1099 static ssize_t alua_support_show(struct config_item *item, char *page) 1100 { 1101 struct se_dev_attrib *da = to_attrib(item); 1102 u8 flags = da->da_dev->transport_flags; 1103 1104 return snprintf(page, PAGE_SIZE, "%d\n", 1105 flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1); 1106 } 1107 1108 static ssize_t alua_support_store(struct config_item *item, 1109 const char *page, size_t count) 1110 { 1111 struct se_dev_attrib *da = to_attrib(item); 1112 struct se_device *dev = da->da_dev; 1113 bool flag; 1114 int ret; 1115 1116 if (!(dev->transport->transport_flags_changeable & 1117 TRANSPORT_FLAG_PASSTHROUGH_ALUA)) { 1118 pr_err("dev[%p]: Unable to change SE Device alua_support:" 1119 " alua_support has fixed value\n", dev); 1120 return -EINVAL; 1121 } 1122 1123 ret = strtobool(page, &flag); 1124 if (ret < 0) 1125 return ret; 1126 1127 if (flag) 1128 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_ALUA; 1129 else 1130 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_ALUA; 1131 return count; 1132 } 1133 1134 static ssize_t pgr_support_show(struct config_item *item, char *page) 1135 { 1136 struct se_dev_attrib *da = to_attrib(item); 1137 u8 flags = da->da_dev->transport_flags; 1138 1139 return snprintf(page, PAGE_SIZE, "%d\n", 1140 flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1); 1141 } 1142 1143 static ssize_t pgr_support_store(struct config_item *item, 1144 const char *page, size_t count) 1145 { 1146 struct se_dev_attrib *da = to_attrib(item); 1147 struct se_device *dev = da->da_dev; 1148 bool flag; 1149 int ret; 1150 1151 if (!(dev->transport->transport_flags_changeable & 1152 TRANSPORT_FLAG_PASSTHROUGH_PGR)) { 1153 pr_err("dev[%p]: Unable to change SE Device pgr_support:" 1154 " pgr_support has fixed value\n", dev); 1155 return -EINVAL; 1156 } 1157 1158 ret = strtobool(page, &flag); 1159 if (ret < 0) 1160 return ret; 1161 1162 if (flag) 1163 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_PGR; 1164 else 1165 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_PGR; 1166 return count; 1167 } 1168 1169 CONFIGFS_ATTR(, emulate_model_alias); 1170 CONFIGFS_ATTR(, emulate_dpo); 1171 CONFIGFS_ATTR(, emulate_fua_write); 1172 CONFIGFS_ATTR(, emulate_fua_read); 1173 CONFIGFS_ATTR(, emulate_write_cache); 1174 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl); 1175 CONFIGFS_ATTR(, emulate_tas); 1176 CONFIGFS_ATTR(, emulate_tpu); 1177 CONFIGFS_ATTR(, emulate_tpws); 1178 CONFIGFS_ATTR(, emulate_caw); 1179 CONFIGFS_ATTR(, emulate_3pc); 1180 CONFIGFS_ATTR(, emulate_pr); 1181 CONFIGFS_ATTR(, pi_prot_type); 1182 CONFIGFS_ATTR_RO(, hw_pi_prot_type); 1183 CONFIGFS_ATTR(, pi_prot_format); 1184 CONFIGFS_ATTR(, pi_prot_verify); 1185 CONFIGFS_ATTR(, enforce_pr_isids); 1186 CONFIGFS_ATTR(, is_nonrot); 1187 CONFIGFS_ATTR(, emulate_rest_reord); 1188 CONFIGFS_ATTR(, force_pr_aptpl); 1189 CONFIGFS_ATTR_RO(, hw_block_size); 1190 CONFIGFS_ATTR(, block_size); 1191 CONFIGFS_ATTR_RO(, hw_max_sectors); 1192 CONFIGFS_ATTR(, optimal_sectors); 1193 CONFIGFS_ATTR_RO(, hw_queue_depth); 1194 CONFIGFS_ATTR(, queue_depth); 1195 CONFIGFS_ATTR(, max_unmap_lba_count); 1196 CONFIGFS_ATTR(, max_unmap_block_desc_count); 1197 CONFIGFS_ATTR(, unmap_granularity); 1198 CONFIGFS_ATTR(, unmap_granularity_alignment); 1199 CONFIGFS_ATTR(, unmap_zeroes_data); 1200 CONFIGFS_ATTR(, max_write_same_len); 1201 CONFIGFS_ATTR(, alua_support); 1202 CONFIGFS_ATTR(, pgr_support); 1203 1204 /* 1205 * dev_attrib attributes for devices using the target core SBC/SPC 1206 * interpreter. Any backend using spc_parse_cdb should be using 1207 * these. 1208 */ 1209 struct configfs_attribute *sbc_attrib_attrs[] = { 1210 &attr_emulate_model_alias, 1211 &attr_emulate_dpo, 1212 &attr_emulate_fua_write, 1213 &attr_emulate_fua_read, 1214 &attr_emulate_write_cache, 1215 &attr_emulate_ua_intlck_ctrl, 1216 &attr_emulate_tas, 1217 &attr_emulate_tpu, 1218 &attr_emulate_tpws, 1219 &attr_emulate_caw, 1220 &attr_emulate_3pc, 1221 &attr_emulate_pr, 1222 &attr_pi_prot_type, 1223 &attr_hw_pi_prot_type, 1224 &attr_pi_prot_format, 1225 &attr_pi_prot_verify, 1226 &attr_enforce_pr_isids, 1227 &attr_is_nonrot, 1228 &attr_emulate_rest_reord, 1229 &attr_force_pr_aptpl, 1230 &attr_hw_block_size, 1231 &attr_block_size, 1232 &attr_hw_max_sectors, 1233 &attr_optimal_sectors, 1234 &attr_hw_queue_depth, 1235 &attr_queue_depth, 1236 &attr_max_unmap_lba_count, 1237 &attr_max_unmap_block_desc_count, 1238 &attr_unmap_granularity, 1239 &attr_unmap_granularity_alignment, 1240 &attr_unmap_zeroes_data, 1241 &attr_max_write_same_len, 1242 &attr_alua_support, 1243 &attr_pgr_support, 1244 NULL, 1245 }; 1246 EXPORT_SYMBOL(sbc_attrib_attrs); 1247 1248 /* 1249 * Minimal dev_attrib attributes for devices passing through CDBs. 1250 * In this case we only provide a few read-only attributes for 1251 * backwards compatibility. 1252 */ 1253 struct configfs_attribute *passthrough_attrib_attrs[] = { 1254 &attr_hw_pi_prot_type, 1255 &attr_hw_block_size, 1256 &attr_hw_max_sectors, 1257 &attr_hw_queue_depth, 1258 &attr_emulate_pr, 1259 &attr_alua_support, 1260 &attr_pgr_support, 1261 NULL, 1262 }; 1263 EXPORT_SYMBOL(passthrough_attrib_attrs); 1264 1265 /* 1266 * pr related dev_attrib attributes for devices passing through CDBs, 1267 * but allowing in core pr emulation. 1268 */ 1269 struct configfs_attribute *passthrough_pr_attrib_attrs[] = { 1270 &attr_enforce_pr_isids, 1271 &attr_force_pr_aptpl, 1272 NULL, 1273 }; 1274 EXPORT_SYMBOL(passthrough_pr_attrib_attrs); 1275 1276 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL); 1277 TB_CIT_SETUP_DRV(dev_action, NULL, NULL); 1278 1279 /* End functions for struct config_item_type tb_dev_attrib_cit */ 1280 1281 /* Start functions for struct config_item_type tb_dev_wwn_cit */ 1282 1283 static struct t10_wwn *to_t10_wwn(struct config_item *item) 1284 { 1285 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group); 1286 } 1287 1288 static ssize_t target_check_inquiry_data(char *buf) 1289 { 1290 size_t len; 1291 int i; 1292 1293 len = strlen(buf); 1294 1295 /* 1296 * SPC 4.3.1: 1297 * ASCII data fields shall contain only ASCII printable characters 1298 * (i.e., code values 20h to 7Eh) and may be terminated with one or 1299 * more ASCII null (00h) characters. 1300 */ 1301 for (i = 0; i < len; i++) { 1302 if (buf[i] < 0x20 || buf[i] > 0x7E) { 1303 pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n"); 1304 return -EINVAL; 1305 } 1306 } 1307 1308 return len; 1309 } 1310 1311 /* 1312 * STANDARD and VPD page 0x83 T10 Vendor Identification 1313 */ 1314 static ssize_t target_wwn_vendor_id_show(struct config_item *item, 1315 char *page) 1316 { 1317 return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]); 1318 } 1319 1320 static ssize_t target_wwn_vendor_id_store(struct config_item *item, 1321 const char *page, size_t count) 1322 { 1323 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1324 struct se_device *dev = t10_wwn->t10_dev; 1325 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1326 unsigned char buf[INQUIRY_VENDOR_LEN + 2]; 1327 char *stripped = NULL; 1328 size_t len; 1329 ssize_t ret; 1330 1331 len = strlcpy(buf, page, sizeof(buf)); 1332 if (len < sizeof(buf)) { 1333 /* Strip any newline added from userspace. */ 1334 stripped = strstrip(buf); 1335 len = strlen(stripped); 1336 } 1337 if (len > INQUIRY_VENDOR_LEN) { 1338 pr_err("Emulated T10 Vendor Identification exceeds" 1339 " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN) 1340 "\n"); 1341 return -EOVERFLOW; 1342 } 1343 1344 ret = target_check_inquiry_data(stripped); 1345 1346 if (ret < 0) 1347 return ret; 1348 1349 /* 1350 * Check to see if any active exports exist. If they do exist, fail 1351 * here as changing this information on the fly (underneath the 1352 * initiator side OS dependent multipath code) could cause negative 1353 * effects. 1354 */ 1355 if (dev->export_count) { 1356 pr_err("Unable to set T10 Vendor Identification while" 1357 " active %d exports exist\n", dev->export_count); 1358 return -EINVAL; 1359 } 1360 1361 BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1); 1362 strlcpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor)); 1363 1364 pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:" 1365 " %s\n", dev->t10_wwn.vendor); 1366 1367 return count; 1368 } 1369 1370 static ssize_t target_wwn_product_id_show(struct config_item *item, 1371 char *page) 1372 { 1373 return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]); 1374 } 1375 1376 static ssize_t target_wwn_product_id_store(struct config_item *item, 1377 const char *page, size_t count) 1378 { 1379 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1380 struct se_device *dev = t10_wwn->t10_dev; 1381 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1382 unsigned char buf[INQUIRY_MODEL_LEN + 2]; 1383 char *stripped = NULL; 1384 size_t len; 1385 ssize_t ret; 1386 1387 len = strlcpy(buf, page, sizeof(buf)); 1388 if (len < sizeof(buf)) { 1389 /* Strip any newline added from userspace. */ 1390 stripped = strstrip(buf); 1391 len = strlen(stripped); 1392 } 1393 if (len > INQUIRY_MODEL_LEN) { 1394 pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: " 1395 __stringify(INQUIRY_MODEL_LEN) 1396 "\n"); 1397 return -EOVERFLOW; 1398 } 1399 1400 ret = target_check_inquiry_data(stripped); 1401 1402 if (ret < 0) 1403 return ret; 1404 1405 /* 1406 * Check to see if any active exports exist. If they do exist, fail 1407 * here as changing this information on the fly (underneath the 1408 * initiator side OS dependent multipath code) could cause negative 1409 * effects. 1410 */ 1411 if (dev->export_count) { 1412 pr_err("Unable to set T10 Model while active %d exports exist\n", 1413 dev->export_count); 1414 return -EINVAL; 1415 } 1416 1417 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); 1418 strlcpy(dev->t10_wwn.model, stripped, sizeof(dev->t10_wwn.model)); 1419 1420 pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n", 1421 dev->t10_wwn.model); 1422 1423 return count; 1424 } 1425 1426 static ssize_t target_wwn_revision_show(struct config_item *item, 1427 char *page) 1428 { 1429 return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]); 1430 } 1431 1432 static ssize_t target_wwn_revision_store(struct config_item *item, 1433 const char *page, size_t count) 1434 { 1435 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1436 struct se_device *dev = t10_wwn->t10_dev; 1437 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1438 unsigned char buf[INQUIRY_REVISION_LEN + 2]; 1439 char *stripped = NULL; 1440 size_t len; 1441 ssize_t ret; 1442 1443 len = strlcpy(buf, page, sizeof(buf)); 1444 if (len < sizeof(buf)) { 1445 /* Strip any newline added from userspace. */ 1446 stripped = strstrip(buf); 1447 len = strlen(stripped); 1448 } 1449 if (len > INQUIRY_REVISION_LEN) { 1450 pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: " 1451 __stringify(INQUIRY_REVISION_LEN) 1452 "\n"); 1453 return -EOVERFLOW; 1454 } 1455 1456 ret = target_check_inquiry_data(stripped); 1457 1458 if (ret < 0) 1459 return ret; 1460 1461 /* 1462 * Check to see if any active exports exist. If they do exist, fail 1463 * here as changing this information on the fly (underneath the 1464 * initiator side OS dependent multipath code) could cause negative 1465 * effects. 1466 */ 1467 if (dev->export_count) { 1468 pr_err("Unable to set T10 Revision while active %d exports exist\n", 1469 dev->export_count); 1470 return -EINVAL; 1471 } 1472 1473 BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1); 1474 strlcpy(dev->t10_wwn.revision, stripped, sizeof(dev->t10_wwn.revision)); 1475 1476 pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n", 1477 dev->t10_wwn.revision); 1478 1479 return count; 1480 } 1481 1482 /* 1483 * VPD page 0x80 Unit serial 1484 */ 1485 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item, 1486 char *page) 1487 { 1488 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 1489 &to_t10_wwn(item)->unit_serial[0]); 1490 } 1491 1492 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item, 1493 const char *page, size_t count) 1494 { 1495 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1496 struct se_device *dev = t10_wwn->t10_dev; 1497 unsigned char buf[INQUIRY_VPD_SERIAL_LEN]; 1498 1499 /* 1500 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 1501 * from the struct scsi_device level firmware, do not allow 1502 * VPD Unit Serial to be emulated. 1503 * 1504 * Note this struct scsi_device could also be emulating VPD 1505 * information from its drivers/scsi LLD. But for now we assume 1506 * it is doing 'the right thing' wrt a world wide unique 1507 * VPD Unit Serial Number that OS dependent multipath can depend on. 1508 */ 1509 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) { 1510 pr_err("Underlying SCSI device firmware provided VPD" 1511 " Unit Serial, ignoring request\n"); 1512 return -EOPNOTSUPP; 1513 } 1514 1515 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 1516 pr_err("Emulated VPD Unit Serial exceeds" 1517 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 1518 return -EOVERFLOW; 1519 } 1520 /* 1521 * Check to see if any active $FABRIC_MOD exports exist. If they 1522 * do exist, fail here as changing this information on the fly 1523 * (underneath the initiator side OS dependent multipath code) 1524 * could cause negative effects. 1525 */ 1526 if (dev->export_count) { 1527 pr_err("Unable to set VPD Unit Serial while" 1528 " active %d $FABRIC_MOD exports exist\n", 1529 dev->export_count); 1530 return -EINVAL; 1531 } 1532 1533 /* 1534 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 1535 * 1536 * Also, strip any newline added from the userspace 1537 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 1538 */ 1539 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN); 1540 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 1541 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 1542 "%s", strstrip(buf)); 1543 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL; 1544 1545 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 1546 " %s\n", dev->t10_wwn.unit_serial); 1547 1548 return count; 1549 } 1550 1551 /* 1552 * VPD page 0x83 Protocol Identifier 1553 */ 1554 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item, 1555 char *page) 1556 { 1557 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1558 struct t10_vpd *vpd; 1559 unsigned char buf[VPD_TMP_BUF_SIZE]; 1560 ssize_t len = 0; 1561 1562 memset(buf, 0, VPD_TMP_BUF_SIZE); 1563 1564 spin_lock(&t10_wwn->t10_vpd_lock); 1565 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 1566 if (!vpd->protocol_identifier_set) 1567 continue; 1568 1569 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 1570 1571 if (len + strlen(buf) >= PAGE_SIZE) 1572 break; 1573 1574 len += sprintf(page+len, "%s", buf); 1575 } 1576 spin_unlock(&t10_wwn->t10_vpd_lock); 1577 1578 return len; 1579 } 1580 1581 /* 1582 * Generic wrapper for dumping VPD identifiers by association. 1583 */ 1584 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 1585 static ssize_t target_wwn_##_name##_show(struct config_item *item, \ 1586 char *page) \ 1587 { \ 1588 struct t10_wwn *t10_wwn = to_t10_wwn(item); \ 1589 struct t10_vpd *vpd; \ 1590 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 1591 ssize_t len = 0; \ 1592 \ 1593 spin_lock(&t10_wwn->t10_vpd_lock); \ 1594 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 1595 if (vpd->association != _assoc) \ 1596 continue; \ 1597 \ 1598 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1599 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 1600 if (len + strlen(buf) >= PAGE_SIZE) \ 1601 break; \ 1602 len += sprintf(page+len, "%s", buf); \ 1603 \ 1604 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1605 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 1606 if (len + strlen(buf) >= PAGE_SIZE) \ 1607 break; \ 1608 len += sprintf(page+len, "%s", buf); \ 1609 \ 1610 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1611 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 1612 if (len + strlen(buf) >= PAGE_SIZE) \ 1613 break; \ 1614 len += sprintf(page+len, "%s", buf); \ 1615 } \ 1616 spin_unlock(&t10_wwn->t10_vpd_lock); \ 1617 \ 1618 return len; \ 1619 } 1620 1621 /* VPD page 0x83 Association: Logical Unit */ 1622 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 1623 /* VPD page 0x83 Association: Target Port */ 1624 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 1625 /* VPD page 0x83 Association: SCSI Target Device */ 1626 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 1627 1628 CONFIGFS_ATTR(target_wwn_, vendor_id); 1629 CONFIGFS_ATTR(target_wwn_, product_id); 1630 CONFIGFS_ATTR(target_wwn_, revision); 1631 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial); 1632 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier); 1633 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit); 1634 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port); 1635 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device); 1636 1637 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 1638 &target_wwn_attr_vendor_id, 1639 &target_wwn_attr_product_id, 1640 &target_wwn_attr_revision, 1641 &target_wwn_attr_vpd_unit_serial, 1642 &target_wwn_attr_vpd_protocol_identifier, 1643 &target_wwn_attr_vpd_assoc_logical_unit, 1644 &target_wwn_attr_vpd_assoc_target_port, 1645 &target_wwn_attr_vpd_assoc_scsi_target_device, 1646 NULL, 1647 }; 1648 1649 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs); 1650 1651 /* End functions for struct config_item_type tb_dev_wwn_cit */ 1652 1653 /* Start functions for struct config_item_type tb_dev_pr_cit */ 1654 1655 static struct se_device *pr_to_dev(struct config_item *item) 1656 { 1657 return container_of(to_config_group(item), struct se_device, 1658 dev_pr_group); 1659 } 1660 1661 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev, 1662 char *page) 1663 { 1664 struct se_node_acl *se_nacl; 1665 struct t10_pr_registration *pr_reg; 1666 char i_buf[PR_REG_ISID_ID_LEN]; 1667 1668 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1669 1670 pr_reg = dev->dev_pr_res_holder; 1671 if (!pr_reg) 1672 return sprintf(page, "No SPC-3 Reservation holder\n"); 1673 1674 se_nacl = pr_reg->pr_reg_nacl; 1675 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1676 1677 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", 1678 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1679 se_nacl->initiatorname, i_buf); 1680 } 1681 1682 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, 1683 char *page) 1684 { 1685 struct se_session *sess = dev->reservation_holder; 1686 struct se_node_acl *se_nacl; 1687 ssize_t len; 1688 1689 if (sess) { 1690 se_nacl = sess->se_node_acl; 1691 len = sprintf(page, 1692 "SPC-2 Reservation: %s Initiator: %s\n", 1693 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1694 se_nacl->initiatorname); 1695 } else { 1696 len = sprintf(page, "No SPC-2 Reservation holder\n"); 1697 } 1698 return len; 1699 } 1700 1701 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page) 1702 { 1703 struct se_device *dev = pr_to_dev(item); 1704 int ret; 1705 1706 if (!dev->dev_attrib.emulate_pr) 1707 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 1708 1709 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1710 return sprintf(page, "Passthrough\n"); 1711 1712 spin_lock(&dev->dev_reservation_lock); 1713 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1714 ret = target_core_dev_pr_show_spc2_res(dev, page); 1715 else 1716 ret = target_core_dev_pr_show_spc3_res(dev, page); 1717 spin_unlock(&dev->dev_reservation_lock); 1718 return ret; 1719 } 1720 1721 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item, 1722 char *page) 1723 { 1724 struct se_device *dev = pr_to_dev(item); 1725 ssize_t len = 0; 1726 1727 spin_lock(&dev->dev_reservation_lock); 1728 if (!dev->dev_pr_res_holder) { 1729 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1730 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { 1731 len = sprintf(page, "SPC-3 Reservation: All Target" 1732 " Ports registration\n"); 1733 } else { 1734 len = sprintf(page, "SPC-3 Reservation: Single" 1735 " Target Port registration\n"); 1736 } 1737 1738 spin_unlock(&dev->dev_reservation_lock); 1739 return len; 1740 } 1741 1742 static ssize_t target_pr_res_pr_generation_show(struct config_item *item, 1743 char *page) 1744 { 1745 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation); 1746 } 1747 1748 1749 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item, 1750 char *page) 1751 { 1752 struct se_device *dev = pr_to_dev(item); 1753 struct se_node_acl *se_nacl; 1754 struct se_portal_group *se_tpg; 1755 struct t10_pr_registration *pr_reg; 1756 const struct target_core_fabric_ops *tfo; 1757 ssize_t len = 0; 1758 1759 spin_lock(&dev->dev_reservation_lock); 1760 pr_reg = dev->dev_pr_res_holder; 1761 if (!pr_reg) { 1762 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1763 goto out_unlock; 1764 } 1765 1766 se_nacl = pr_reg->pr_reg_nacl; 1767 se_tpg = se_nacl->se_tpg; 1768 tfo = se_tpg->se_tpg_tfo; 1769 1770 len += sprintf(page+len, "SPC-3 Reservation: %s" 1771 " Target Node Endpoint: %s\n", tfo->fabric_name, 1772 tfo->tpg_get_wwn(se_tpg)); 1773 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1774 " Identifier Tag: %hu %s Portal Group Tag: %hu" 1775 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi, 1776 tfo->fabric_name, tfo->tpg_get_tag(se_tpg), 1777 tfo->fabric_name, pr_reg->pr_aptpl_target_lun); 1778 1779 out_unlock: 1780 spin_unlock(&dev->dev_reservation_lock); 1781 return len; 1782 } 1783 1784 1785 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item, 1786 char *page) 1787 { 1788 struct se_device *dev = pr_to_dev(item); 1789 const struct target_core_fabric_ops *tfo; 1790 struct t10_pr_registration *pr_reg; 1791 unsigned char buf[384]; 1792 char i_buf[PR_REG_ISID_ID_LEN]; 1793 ssize_t len = 0; 1794 int reg_count = 0; 1795 1796 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1797 1798 spin_lock(&dev->t10_pr.registration_lock); 1799 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1800 pr_reg_list) { 1801 1802 memset(buf, 0, 384); 1803 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1804 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1805 core_pr_dump_initiator_port(pr_reg, i_buf, 1806 PR_REG_ISID_ID_LEN); 1807 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1808 tfo->fabric_name, 1809 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, 1810 pr_reg->pr_res_generation); 1811 1812 if (len + strlen(buf) >= PAGE_SIZE) 1813 break; 1814 1815 len += sprintf(page+len, "%s", buf); 1816 reg_count++; 1817 } 1818 spin_unlock(&dev->t10_pr.registration_lock); 1819 1820 if (!reg_count) 1821 len += sprintf(page+len, "None\n"); 1822 1823 return len; 1824 } 1825 1826 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page) 1827 { 1828 struct se_device *dev = pr_to_dev(item); 1829 struct t10_pr_registration *pr_reg; 1830 ssize_t len = 0; 1831 1832 spin_lock(&dev->dev_reservation_lock); 1833 pr_reg = dev->dev_pr_res_holder; 1834 if (pr_reg) { 1835 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1836 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 1837 } else { 1838 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1839 } 1840 1841 spin_unlock(&dev->dev_reservation_lock); 1842 return len; 1843 } 1844 1845 static ssize_t target_pr_res_type_show(struct config_item *item, char *page) 1846 { 1847 struct se_device *dev = pr_to_dev(item); 1848 1849 if (!dev->dev_attrib.emulate_pr) 1850 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 1851 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1852 return sprintf(page, "SPC_PASSTHROUGH\n"); 1853 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1854 return sprintf(page, "SPC2_RESERVATIONS\n"); 1855 1856 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 1857 } 1858 1859 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item, 1860 char *page) 1861 { 1862 struct se_device *dev = pr_to_dev(item); 1863 1864 if (!dev->dev_attrib.emulate_pr || 1865 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 1866 return 0; 1867 1868 return sprintf(page, "APTPL Bit Status: %s\n", 1869 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 1870 } 1871 1872 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item, 1873 char *page) 1874 { 1875 struct se_device *dev = pr_to_dev(item); 1876 1877 if (!dev->dev_attrib.emulate_pr || 1878 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 1879 return 0; 1880 1881 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 1882 } 1883 1884 enum { 1885 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 1886 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 1887 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 1888 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 1889 }; 1890 1891 static match_table_t tokens = { 1892 {Opt_initiator_fabric, "initiator_fabric=%s"}, 1893 {Opt_initiator_node, "initiator_node=%s"}, 1894 {Opt_initiator_sid, "initiator_sid=%s"}, 1895 {Opt_sa_res_key, "sa_res_key=%s"}, 1896 {Opt_res_holder, "res_holder=%d"}, 1897 {Opt_res_type, "res_type=%d"}, 1898 {Opt_res_scope, "res_scope=%d"}, 1899 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 1900 {Opt_mapped_lun, "mapped_lun=%u"}, 1901 {Opt_target_fabric, "target_fabric=%s"}, 1902 {Opt_target_node, "target_node=%s"}, 1903 {Opt_tpgt, "tpgt=%d"}, 1904 {Opt_port_rtpi, "port_rtpi=%d"}, 1905 {Opt_target_lun, "target_lun=%u"}, 1906 {Opt_err, NULL} 1907 }; 1908 1909 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item, 1910 const char *page, size_t count) 1911 { 1912 struct se_device *dev = pr_to_dev(item); 1913 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 1914 unsigned char *t_fabric = NULL, *t_port = NULL; 1915 char *orig, *ptr, *opts; 1916 substring_t args[MAX_OPT_ARGS]; 1917 unsigned long long tmp_ll; 1918 u64 sa_res_key = 0; 1919 u64 mapped_lun = 0, target_lun = 0; 1920 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 1921 u16 tpgt = 0; 1922 u8 type = 0; 1923 1924 if (!dev->dev_attrib.emulate_pr || 1925 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 1926 return count; 1927 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1928 return count; 1929 1930 if (dev->export_count) { 1931 pr_debug("Unable to process APTPL metadata while" 1932 " active fabric exports exist\n"); 1933 return -EINVAL; 1934 } 1935 1936 opts = kstrdup(page, GFP_KERNEL); 1937 if (!opts) 1938 return -ENOMEM; 1939 1940 orig = opts; 1941 while ((ptr = strsep(&opts, ",\n")) != NULL) { 1942 if (!*ptr) 1943 continue; 1944 1945 token = match_token(ptr, tokens, args); 1946 switch (token) { 1947 case Opt_initiator_fabric: 1948 i_fabric = match_strdup(args); 1949 if (!i_fabric) { 1950 ret = -ENOMEM; 1951 goto out; 1952 } 1953 break; 1954 case Opt_initiator_node: 1955 i_port = match_strdup(args); 1956 if (!i_port) { 1957 ret = -ENOMEM; 1958 goto out; 1959 } 1960 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 1961 pr_err("APTPL metadata initiator_node=" 1962 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 1963 PR_APTPL_MAX_IPORT_LEN); 1964 ret = -EINVAL; 1965 break; 1966 } 1967 break; 1968 case Opt_initiator_sid: 1969 isid = match_strdup(args); 1970 if (!isid) { 1971 ret = -ENOMEM; 1972 goto out; 1973 } 1974 if (strlen(isid) >= PR_REG_ISID_LEN) { 1975 pr_err("APTPL metadata initiator_isid" 1976 "= exceeds PR_REG_ISID_LEN: %d\n", 1977 PR_REG_ISID_LEN); 1978 ret = -EINVAL; 1979 break; 1980 } 1981 break; 1982 case Opt_sa_res_key: 1983 ret = match_u64(args, &tmp_ll); 1984 if (ret < 0) { 1985 pr_err("kstrtoull() failed for sa_res_key=\n"); 1986 goto out; 1987 } 1988 sa_res_key = (u64)tmp_ll; 1989 break; 1990 /* 1991 * PR APTPL Metadata for Reservation 1992 */ 1993 case Opt_res_holder: 1994 ret = match_int(args, &arg); 1995 if (ret) 1996 goto out; 1997 res_holder = arg; 1998 break; 1999 case Opt_res_type: 2000 ret = match_int(args, &arg); 2001 if (ret) 2002 goto out; 2003 type = (u8)arg; 2004 break; 2005 case Opt_res_scope: 2006 ret = match_int(args, &arg); 2007 if (ret) 2008 goto out; 2009 break; 2010 case Opt_res_all_tg_pt: 2011 ret = match_int(args, &arg); 2012 if (ret) 2013 goto out; 2014 all_tg_pt = (int)arg; 2015 break; 2016 case Opt_mapped_lun: 2017 ret = match_u64(args, &tmp_ll); 2018 if (ret) 2019 goto out; 2020 mapped_lun = (u64)tmp_ll; 2021 break; 2022 /* 2023 * PR APTPL Metadata for Target Port 2024 */ 2025 case Opt_target_fabric: 2026 t_fabric = match_strdup(args); 2027 if (!t_fabric) { 2028 ret = -ENOMEM; 2029 goto out; 2030 } 2031 break; 2032 case Opt_target_node: 2033 t_port = match_strdup(args); 2034 if (!t_port) { 2035 ret = -ENOMEM; 2036 goto out; 2037 } 2038 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 2039 pr_err("APTPL metadata target_node=" 2040 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 2041 PR_APTPL_MAX_TPORT_LEN); 2042 ret = -EINVAL; 2043 break; 2044 } 2045 break; 2046 case Opt_tpgt: 2047 ret = match_int(args, &arg); 2048 if (ret) 2049 goto out; 2050 tpgt = (u16)arg; 2051 break; 2052 case Opt_port_rtpi: 2053 ret = match_int(args, &arg); 2054 if (ret) 2055 goto out; 2056 break; 2057 case Opt_target_lun: 2058 ret = match_u64(args, &tmp_ll); 2059 if (ret) 2060 goto out; 2061 target_lun = (u64)tmp_ll; 2062 break; 2063 default: 2064 break; 2065 } 2066 } 2067 2068 if (!i_port || !t_port || !sa_res_key) { 2069 pr_err("Illegal parameters for APTPL registration\n"); 2070 ret = -EINVAL; 2071 goto out; 2072 } 2073 2074 if (res_holder && !(type)) { 2075 pr_err("Illegal PR type: 0x%02x for reservation" 2076 " holder\n", type); 2077 ret = -EINVAL; 2078 goto out; 2079 } 2080 2081 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, 2082 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 2083 res_holder, all_tg_pt, type); 2084 out: 2085 kfree(i_fabric); 2086 kfree(i_port); 2087 kfree(isid); 2088 kfree(t_fabric); 2089 kfree(t_port); 2090 kfree(orig); 2091 return (ret == 0) ? count : ret; 2092 } 2093 2094 2095 CONFIGFS_ATTR_RO(target_pr_, res_holder); 2096 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts); 2097 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation); 2098 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port); 2099 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts); 2100 CONFIGFS_ATTR_RO(target_pr_, res_pr_type); 2101 CONFIGFS_ATTR_RO(target_pr_, res_type); 2102 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active); 2103 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata); 2104 2105 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 2106 &target_pr_attr_res_holder, 2107 &target_pr_attr_res_pr_all_tgt_pts, 2108 &target_pr_attr_res_pr_generation, 2109 &target_pr_attr_res_pr_holder_tg_port, 2110 &target_pr_attr_res_pr_registered_i_pts, 2111 &target_pr_attr_res_pr_type, 2112 &target_pr_attr_res_type, 2113 &target_pr_attr_res_aptpl_active, 2114 &target_pr_attr_res_aptpl_metadata, 2115 NULL, 2116 }; 2117 2118 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs); 2119 2120 /* End functions for struct config_item_type tb_dev_pr_cit */ 2121 2122 /* Start functions for struct config_item_type tb_dev_cit */ 2123 2124 static inline struct se_device *to_device(struct config_item *item) 2125 { 2126 return container_of(to_config_group(item), struct se_device, dev_group); 2127 } 2128 2129 static ssize_t target_dev_info_show(struct config_item *item, char *page) 2130 { 2131 struct se_device *dev = to_device(item); 2132 int bl = 0; 2133 ssize_t read_bytes = 0; 2134 2135 transport_dump_dev_state(dev, page, &bl); 2136 read_bytes += bl; 2137 read_bytes += dev->transport->show_configfs_dev_params(dev, 2138 page+read_bytes); 2139 return read_bytes; 2140 } 2141 2142 static ssize_t target_dev_control_store(struct config_item *item, 2143 const char *page, size_t count) 2144 { 2145 struct se_device *dev = to_device(item); 2146 2147 return dev->transport->set_configfs_dev_params(dev, page, count); 2148 } 2149 2150 static ssize_t target_dev_alias_show(struct config_item *item, char *page) 2151 { 2152 struct se_device *dev = to_device(item); 2153 2154 if (!(dev->dev_flags & DF_USING_ALIAS)) 2155 return 0; 2156 2157 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); 2158 } 2159 2160 static ssize_t target_dev_alias_store(struct config_item *item, 2161 const char *page, size_t count) 2162 { 2163 struct se_device *dev = to_device(item); 2164 struct se_hba *hba = dev->se_hba; 2165 ssize_t read_bytes; 2166 2167 if (count > (SE_DEV_ALIAS_LEN-1)) { 2168 pr_err("alias count: %d exceeds" 2169 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 2170 SE_DEV_ALIAS_LEN-1); 2171 return -EINVAL; 2172 } 2173 2174 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); 2175 if (!read_bytes) 2176 return -EINVAL; 2177 if (dev->dev_alias[read_bytes - 1] == '\n') 2178 dev->dev_alias[read_bytes - 1] = '\0'; 2179 2180 dev->dev_flags |= DF_USING_ALIAS; 2181 2182 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 2183 config_item_name(&hba->hba_group.cg_item), 2184 config_item_name(&dev->dev_group.cg_item), 2185 dev->dev_alias); 2186 2187 return read_bytes; 2188 } 2189 2190 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page) 2191 { 2192 struct se_device *dev = to_device(item); 2193 2194 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) 2195 return 0; 2196 2197 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); 2198 } 2199 2200 static ssize_t target_dev_udev_path_store(struct config_item *item, 2201 const char *page, size_t count) 2202 { 2203 struct se_device *dev = to_device(item); 2204 struct se_hba *hba = dev->se_hba; 2205 ssize_t read_bytes; 2206 2207 if (count > (SE_UDEV_PATH_LEN-1)) { 2208 pr_err("udev_path count: %d exceeds" 2209 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 2210 SE_UDEV_PATH_LEN-1); 2211 return -EINVAL; 2212 } 2213 2214 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, 2215 "%s", page); 2216 if (!read_bytes) 2217 return -EINVAL; 2218 if (dev->udev_path[read_bytes - 1] == '\n') 2219 dev->udev_path[read_bytes - 1] = '\0'; 2220 2221 dev->dev_flags |= DF_USING_UDEV_PATH; 2222 2223 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 2224 config_item_name(&hba->hba_group.cg_item), 2225 config_item_name(&dev->dev_group.cg_item), 2226 dev->udev_path); 2227 2228 return read_bytes; 2229 } 2230 2231 static ssize_t target_dev_enable_show(struct config_item *item, char *page) 2232 { 2233 struct se_device *dev = to_device(item); 2234 2235 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev)); 2236 } 2237 2238 static ssize_t target_dev_enable_store(struct config_item *item, 2239 const char *page, size_t count) 2240 { 2241 struct se_device *dev = to_device(item); 2242 char *ptr; 2243 int ret; 2244 2245 ptr = strstr(page, "1"); 2246 if (!ptr) { 2247 pr_err("For dev_enable ops, only valid value" 2248 " is \"1\"\n"); 2249 return -EINVAL; 2250 } 2251 2252 ret = target_configure_device(dev); 2253 if (ret) 2254 return ret; 2255 return count; 2256 } 2257 2258 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page) 2259 { 2260 struct se_device *dev = to_device(item); 2261 struct config_item *lu_ci; 2262 struct t10_alua_lu_gp *lu_gp; 2263 struct t10_alua_lu_gp_member *lu_gp_mem; 2264 ssize_t len = 0; 2265 2266 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2267 if (!lu_gp_mem) 2268 return 0; 2269 2270 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2271 lu_gp = lu_gp_mem->lu_gp; 2272 if (lu_gp) { 2273 lu_ci = &lu_gp->lu_gp_group.cg_item; 2274 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 2275 config_item_name(lu_ci), lu_gp->lu_gp_id); 2276 } 2277 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2278 2279 return len; 2280 } 2281 2282 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item, 2283 const char *page, size_t count) 2284 { 2285 struct se_device *dev = to_device(item); 2286 struct se_hba *hba = dev->se_hba; 2287 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 2288 struct t10_alua_lu_gp_member *lu_gp_mem; 2289 unsigned char buf[LU_GROUP_NAME_BUF]; 2290 int move = 0; 2291 2292 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2293 if (!lu_gp_mem) 2294 return count; 2295 2296 if (count > LU_GROUP_NAME_BUF) { 2297 pr_err("ALUA LU Group Alias too large!\n"); 2298 return -EINVAL; 2299 } 2300 memset(buf, 0, LU_GROUP_NAME_BUF); 2301 memcpy(buf, page, count); 2302 /* 2303 * Any ALUA logical unit alias besides "NULL" means we will be 2304 * making a new group association. 2305 */ 2306 if (strcmp(strstrip(buf), "NULL")) { 2307 /* 2308 * core_alua_get_lu_gp_by_name() will increment reference to 2309 * struct t10_alua_lu_gp. This reference is released with 2310 * core_alua_get_lu_gp_by_name below(). 2311 */ 2312 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 2313 if (!lu_gp_new) 2314 return -ENODEV; 2315 } 2316 2317 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2318 lu_gp = lu_gp_mem->lu_gp; 2319 if (lu_gp) { 2320 /* 2321 * Clearing an existing lu_gp association, and replacing 2322 * with NULL 2323 */ 2324 if (!lu_gp_new) { 2325 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 2326 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 2327 " %hu\n", 2328 config_item_name(&hba->hba_group.cg_item), 2329 config_item_name(&dev->dev_group.cg_item), 2330 config_item_name(&lu_gp->lu_gp_group.cg_item), 2331 lu_gp->lu_gp_id); 2332 2333 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2334 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2335 2336 return count; 2337 } 2338 /* 2339 * Removing existing association of lu_gp_mem with lu_gp 2340 */ 2341 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2342 move = 1; 2343 } 2344 /* 2345 * Associate lu_gp_mem with lu_gp_new. 2346 */ 2347 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 2348 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2349 2350 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 2351 " core/alua/lu_gps/%s, ID: %hu\n", 2352 (move) ? "Moving" : "Adding", 2353 config_item_name(&hba->hba_group.cg_item), 2354 config_item_name(&dev->dev_group.cg_item), 2355 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 2356 lu_gp_new->lu_gp_id); 2357 2358 core_alua_put_lu_gp_from_name(lu_gp_new); 2359 return count; 2360 } 2361 2362 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page) 2363 { 2364 struct se_device *dev = to_device(item); 2365 struct t10_alua_lba_map *map; 2366 struct t10_alua_lba_map_member *mem; 2367 char *b = page; 2368 int bl = 0; 2369 char state; 2370 2371 spin_lock(&dev->t10_alua.lba_map_lock); 2372 if (!list_empty(&dev->t10_alua.lba_map_list)) 2373 bl += sprintf(b + bl, "%u %u\n", 2374 dev->t10_alua.lba_map_segment_size, 2375 dev->t10_alua.lba_map_segment_multiplier); 2376 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) { 2377 bl += sprintf(b + bl, "%llu %llu", 2378 map->lba_map_first_lba, map->lba_map_last_lba); 2379 list_for_each_entry(mem, &map->lba_map_mem_list, 2380 lba_map_mem_list) { 2381 switch (mem->lba_map_mem_alua_state) { 2382 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: 2383 state = 'O'; 2384 break; 2385 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: 2386 state = 'A'; 2387 break; 2388 case ALUA_ACCESS_STATE_STANDBY: 2389 state = 'S'; 2390 break; 2391 case ALUA_ACCESS_STATE_UNAVAILABLE: 2392 state = 'U'; 2393 break; 2394 default: 2395 state = '.'; 2396 break; 2397 } 2398 bl += sprintf(b + bl, " %d:%c", 2399 mem->lba_map_mem_alua_pg_id, state); 2400 } 2401 bl += sprintf(b + bl, "\n"); 2402 } 2403 spin_unlock(&dev->t10_alua.lba_map_lock); 2404 return bl; 2405 } 2406 2407 static ssize_t target_dev_lba_map_store(struct config_item *item, 2408 const char *page, size_t count) 2409 { 2410 struct se_device *dev = to_device(item); 2411 struct t10_alua_lba_map *lba_map = NULL; 2412 struct list_head lba_list; 2413 char *map_entries, *orig, *ptr; 2414 char state; 2415 int pg_num = -1, pg; 2416 int ret = 0, num = 0, pg_id, alua_state; 2417 unsigned long start_lba = -1, end_lba = -1; 2418 unsigned long segment_size = -1, segment_mult = -1; 2419 2420 orig = map_entries = kstrdup(page, GFP_KERNEL); 2421 if (!map_entries) 2422 return -ENOMEM; 2423 2424 INIT_LIST_HEAD(&lba_list); 2425 while ((ptr = strsep(&map_entries, "\n")) != NULL) { 2426 if (!*ptr) 2427 continue; 2428 2429 if (num == 0) { 2430 if (sscanf(ptr, "%lu %lu\n", 2431 &segment_size, &segment_mult) != 2) { 2432 pr_err("Invalid line %d\n", num); 2433 ret = -EINVAL; 2434 break; 2435 } 2436 num++; 2437 continue; 2438 } 2439 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) { 2440 pr_err("Invalid line %d\n", num); 2441 ret = -EINVAL; 2442 break; 2443 } 2444 ptr = strchr(ptr, ' '); 2445 if (!ptr) { 2446 pr_err("Invalid line %d, missing end lba\n", num); 2447 ret = -EINVAL; 2448 break; 2449 } 2450 ptr++; 2451 ptr = strchr(ptr, ' '); 2452 if (!ptr) { 2453 pr_err("Invalid line %d, missing state definitions\n", 2454 num); 2455 ret = -EINVAL; 2456 break; 2457 } 2458 ptr++; 2459 lba_map = core_alua_allocate_lba_map(&lba_list, 2460 start_lba, end_lba); 2461 if (IS_ERR(lba_map)) { 2462 ret = PTR_ERR(lba_map); 2463 break; 2464 } 2465 pg = 0; 2466 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) { 2467 switch (state) { 2468 case 'O': 2469 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED; 2470 break; 2471 case 'A': 2472 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED; 2473 break; 2474 case 'S': 2475 alua_state = ALUA_ACCESS_STATE_STANDBY; 2476 break; 2477 case 'U': 2478 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE; 2479 break; 2480 default: 2481 pr_err("Invalid ALUA state '%c'\n", state); 2482 ret = -EINVAL; 2483 goto out; 2484 } 2485 2486 ret = core_alua_allocate_lba_map_mem(lba_map, 2487 pg_id, alua_state); 2488 if (ret) { 2489 pr_err("Invalid target descriptor %d:%c " 2490 "at line %d\n", 2491 pg_id, state, num); 2492 break; 2493 } 2494 pg++; 2495 ptr = strchr(ptr, ' '); 2496 if (ptr) 2497 ptr++; 2498 else 2499 break; 2500 } 2501 if (pg_num == -1) 2502 pg_num = pg; 2503 else if (pg != pg_num) { 2504 pr_err("Only %d from %d port groups definitions " 2505 "at line %d\n", pg, pg_num, num); 2506 ret = -EINVAL; 2507 break; 2508 } 2509 num++; 2510 } 2511 out: 2512 if (ret) { 2513 core_alua_free_lba_map(&lba_list); 2514 count = ret; 2515 } else 2516 core_alua_set_lba_map(dev, &lba_list, 2517 segment_size, segment_mult); 2518 kfree(orig); 2519 return count; 2520 } 2521 2522 CONFIGFS_ATTR_RO(target_dev_, info); 2523 CONFIGFS_ATTR_WO(target_dev_, control); 2524 CONFIGFS_ATTR(target_dev_, alias); 2525 CONFIGFS_ATTR(target_dev_, udev_path); 2526 CONFIGFS_ATTR(target_dev_, enable); 2527 CONFIGFS_ATTR(target_dev_, alua_lu_gp); 2528 CONFIGFS_ATTR(target_dev_, lba_map); 2529 2530 static struct configfs_attribute *target_core_dev_attrs[] = { 2531 &target_dev_attr_info, 2532 &target_dev_attr_control, 2533 &target_dev_attr_alias, 2534 &target_dev_attr_udev_path, 2535 &target_dev_attr_enable, 2536 &target_dev_attr_alua_lu_gp, 2537 &target_dev_attr_lba_map, 2538 NULL, 2539 }; 2540 2541 static void target_core_dev_release(struct config_item *item) 2542 { 2543 struct config_group *dev_cg = to_config_group(item); 2544 struct se_device *dev = 2545 container_of(dev_cg, struct se_device, dev_group); 2546 2547 target_free_device(dev); 2548 } 2549 2550 /* 2551 * Used in target_core_fabric_configfs.c to verify valid se_device symlink 2552 * within target_fabric_port_link() 2553 */ 2554 struct configfs_item_operations target_core_dev_item_ops = { 2555 .release = target_core_dev_release, 2556 }; 2557 2558 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs); 2559 2560 /* End functions for struct config_item_type tb_dev_cit */ 2561 2562 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 2563 2564 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item) 2565 { 2566 return container_of(to_config_group(item), struct t10_alua_lu_gp, 2567 lu_gp_group); 2568 } 2569 2570 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page) 2571 { 2572 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2573 2574 if (!lu_gp->lu_gp_valid_id) 2575 return 0; 2576 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2577 } 2578 2579 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item, 2580 const char *page, size_t count) 2581 { 2582 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2583 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2584 unsigned long lu_gp_id; 2585 int ret; 2586 2587 ret = kstrtoul(page, 0, &lu_gp_id); 2588 if (ret < 0) { 2589 pr_err("kstrtoul() returned %d for" 2590 " lu_gp_id\n", ret); 2591 return ret; 2592 } 2593 if (lu_gp_id > 0x0000ffff) { 2594 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 2595 " 0x0000ffff\n", lu_gp_id); 2596 return -EINVAL; 2597 } 2598 2599 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2600 if (ret < 0) 2601 return -EINVAL; 2602 2603 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 2604 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2605 config_item_name(&alua_lu_gp_cg->cg_item), 2606 lu_gp->lu_gp_id); 2607 2608 return count; 2609 } 2610 2611 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page) 2612 { 2613 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2614 struct se_device *dev; 2615 struct se_hba *hba; 2616 struct t10_alua_lu_gp_member *lu_gp_mem; 2617 ssize_t len = 0, cur_len; 2618 unsigned char buf[LU_GROUP_NAME_BUF]; 2619 2620 memset(buf, 0, LU_GROUP_NAME_BUF); 2621 2622 spin_lock(&lu_gp->lu_gp_lock); 2623 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2624 dev = lu_gp_mem->lu_gp_mem_dev; 2625 hba = dev->se_hba; 2626 2627 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 2628 config_item_name(&hba->hba_group.cg_item), 2629 config_item_name(&dev->dev_group.cg_item)); 2630 cur_len++; /* Extra byte for NULL terminator */ 2631 2632 if ((cur_len + len) > PAGE_SIZE) { 2633 pr_warn("Ran out of lu_gp_show_attr" 2634 "_members buffer\n"); 2635 break; 2636 } 2637 memcpy(page+len, buf, cur_len); 2638 len += cur_len; 2639 } 2640 spin_unlock(&lu_gp->lu_gp_lock); 2641 2642 return len; 2643 } 2644 2645 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id); 2646 CONFIGFS_ATTR_RO(target_lu_gp_, members); 2647 2648 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2649 &target_lu_gp_attr_lu_gp_id, 2650 &target_lu_gp_attr_members, 2651 NULL, 2652 }; 2653 2654 static void target_core_alua_lu_gp_release(struct config_item *item) 2655 { 2656 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2657 struct t10_alua_lu_gp, lu_gp_group); 2658 2659 core_alua_free_lu_gp(lu_gp); 2660 } 2661 2662 static struct configfs_item_operations target_core_alua_lu_gp_ops = { 2663 .release = target_core_alua_lu_gp_release, 2664 }; 2665 2666 static const struct config_item_type target_core_alua_lu_gp_cit = { 2667 .ct_item_ops = &target_core_alua_lu_gp_ops, 2668 .ct_attrs = target_core_alua_lu_gp_attrs, 2669 .ct_owner = THIS_MODULE, 2670 }; 2671 2672 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2673 2674 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2675 2676 static struct config_group *target_core_alua_create_lu_gp( 2677 struct config_group *group, 2678 const char *name) 2679 { 2680 struct t10_alua_lu_gp *lu_gp; 2681 struct config_group *alua_lu_gp_cg = NULL; 2682 struct config_item *alua_lu_gp_ci = NULL; 2683 2684 lu_gp = core_alua_allocate_lu_gp(name, 0); 2685 if (IS_ERR(lu_gp)) 2686 return NULL; 2687 2688 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2689 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2690 2691 config_group_init_type_name(alua_lu_gp_cg, name, 2692 &target_core_alua_lu_gp_cit); 2693 2694 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2695 " Group: core/alua/lu_gps/%s\n", 2696 config_item_name(alua_lu_gp_ci)); 2697 2698 return alua_lu_gp_cg; 2699 2700 } 2701 2702 static void target_core_alua_drop_lu_gp( 2703 struct config_group *group, 2704 struct config_item *item) 2705 { 2706 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2707 struct t10_alua_lu_gp, lu_gp_group); 2708 2709 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2710 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2711 config_item_name(item), lu_gp->lu_gp_id); 2712 /* 2713 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 2714 * -> target_core_alua_lu_gp_release() 2715 */ 2716 config_item_put(item); 2717 } 2718 2719 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2720 .make_group = &target_core_alua_create_lu_gp, 2721 .drop_item = &target_core_alua_drop_lu_gp, 2722 }; 2723 2724 static const struct config_item_type target_core_alua_lu_gps_cit = { 2725 .ct_item_ops = NULL, 2726 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2727 .ct_owner = THIS_MODULE, 2728 }; 2729 2730 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2731 2732 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2733 2734 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item) 2735 { 2736 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp, 2737 tg_pt_gp_group); 2738 } 2739 2740 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item, 2741 char *page) 2742 { 2743 return sprintf(page, "%d\n", 2744 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state); 2745 } 2746 2747 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item, 2748 const char *page, size_t count) 2749 { 2750 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2751 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; 2752 unsigned long tmp; 2753 int new_state, ret; 2754 2755 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2756 pr_err("Unable to do implicit ALUA on non valid" 2757 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id); 2758 return -EINVAL; 2759 } 2760 if (!target_dev_configured(dev)) { 2761 pr_err("Unable to set alua_access_state while device is" 2762 " not configured\n"); 2763 return -ENODEV; 2764 } 2765 2766 ret = kstrtoul(page, 0, &tmp); 2767 if (ret < 0) { 2768 pr_err("Unable to extract new ALUA access state from" 2769 " %s\n", page); 2770 return ret; 2771 } 2772 new_state = (int)tmp; 2773 2774 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) { 2775 pr_err("Unable to process implicit configfs ALUA" 2776 " transition while TPGS_IMPLICIT_ALUA is disabled\n"); 2777 return -EINVAL; 2778 } 2779 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA && 2780 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) { 2781 /* LBA DEPENDENT is only allowed with implicit ALUA */ 2782 pr_err("Unable to process implicit configfs ALUA transition" 2783 " while explicit ALUA management is enabled\n"); 2784 return -EINVAL; 2785 } 2786 2787 ret = core_alua_do_port_transition(tg_pt_gp, dev, 2788 NULL, NULL, new_state, 0); 2789 return (!ret) ? count : -EINVAL; 2790 } 2791 2792 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item, 2793 char *page) 2794 { 2795 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2796 return sprintf(page, "%s\n", 2797 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2798 } 2799 2800 static ssize_t target_tg_pt_gp_alua_access_status_store( 2801 struct config_item *item, const char *page, size_t count) 2802 { 2803 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2804 unsigned long tmp; 2805 int new_status, ret; 2806 2807 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2808 pr_err("Unable to do set ALUA access status on non" 2809 " valid tg_pt_gp ID: %hu\n", 2810 tg_pt_gp->tg_pt_gp_valid_id); 2811 return -EINVAL; 2812 } 2813 2814 ret = kstrtoul(page, 0, &tmp); 2815 if (ret < 0) { 2816 pr_err("Unable to extract new ALUA access status" 2817 " from %s\n", page); 2818 return ret; 2819 } 2820 new_status = (int)tmp; 2821 2822 if ((new_status != ALUA_STATUS_NONE) && 2823 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && 2824 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { 2825 pr_err("Illegal ALUA access status: 0x%02x\n", 2826 new_status); 2827 return -EINVAL; 2828 } 2829 2830 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2831 return count; 2832 } 2833 2834 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item, 2835 char *page) 2836 { 2837 return core_alua_show_access_type(to_tg_pt_gp(item), page); 2838 } 2839 2840 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item, 2841 const char *page, size_t count) 2842 { 2843 return core_alua_store_access_type(to_tg_pt_gp(item), page, count); 2844 } 2845 2846 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \ 2847 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \ 2848 struct config_item *item, char *p) \ 2849 { \ 2850 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 2851 return sprintf(p, "%d\n", \ 2852 !!(t->tg_pt_gp_alua_supported_states & _bit)); \ 2853 } \ 2854 \ 2855 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \ 2856 struct config_item *item, const char *p, size_t c) \ 2857 { \ 2858 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 2859 unsigned long tmp; \ 2860 int ret; \ 2861 \ 2862 if (!t->tg_pt_gp_valid_id) { \ 2863 pr_err("Unable to do set " #_name " ALUA state on non" \ 2864 " valid tg_pt_gp ID: %hu\n", \ 2865 t->tg_pt_gp_valid_id); \ 2866 return -EINVAL; \ 2867 } \ 2868 \ 2869 ret = kstrtoul(p, 0, &tmp); \ 2870 if (ret < 0) { \ 2871 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \ 2872 return -EINVAL; \ 2873 } \ 2874 if (tmp > 1) { \ 2875 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \ 2876 return -EINVAL; \ 2877 } \ 2878 if (tmp) \ 2879 t->tg_pt_gp_alua_supported_states |= _bit; \ 2880 else \ 2881 t->tg_pt_gp_alua_supported_states &= ~_bit; \ 2882 \ 2883 return c; \ 2884 } 2885 2886 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP); 2887 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP); 2888 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP); 2889 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP); 2890 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP); 2891 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP); 2892 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP); 2893 2894 static ssize_t target_tg_pt_gp_alua_write_metadata_show( 2895 struct config_item *item, char *page) 2896 { 2897 return sprintf(page, "%d\n", 2898 to_tg_pt_gp(item)->tg_pt_gp_write_metadata); 2899 } 2900 2901 static ssize_t target_tg_pt_gp_alua_write_metadata_store( 2902 struct config_item *item, const char *page, size_t count) 2903 { 2904 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2905 unsigned long tmp; 2906 int ret; 2907 2908 ret = kstrtoul(page, 0, &tmp); 2909 if (ret < 0) { 2910 pr_err("Unable to extract alua_write_metadata\n"); 2911 return ret; 2912 } 2913 2914 if ((tmp != 0) && (tmp != 1)) { 2915 pr_err("Illegal value for alua_write_metadata:" 2916 " %lu\n", tmp); 2917 return -EINVAL; 2918 } 2919 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 2920 2921 return count; 2922 } 2923 2924 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item, 2925 char *page) 2926 { 2927 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page); 2928 } 2929 2930 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item, 2931 const char *page, size_t count) 2932 { 2933 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page, 2934 count); 2935 } 2936 2937 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item, 2938 char *page) 2939 { 2940 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page); 2941 } 2942 2943 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item, 2944 const char *page, size_t count) 2945 { 2946 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page, 2947 count); 2948 } 2949 2950 static ssize_t target_tg_pt_gp_implicit_trans_secs_show( 2951 struct config_item *item, char *page) 2952 { 2953 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page); 2954 } 2955 2956 static ssize_t target_tg_pt_gp_implicit_trans_secs_store( 2957 struct config_item *item, const char *page, size_t count) 2958 { 2959 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page, 2960 count); 2961 } 2962 2963 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item, 2964 char *page) 2965 { 2966 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page); 2967 } 2968 2969 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item, 2970 const char *page, size_t count) 2971 { 2972 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count); 2973 } 2974 2975 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item, 2976 char *page) 2977 { 2978 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2979 2980 if (!tg_pt_gp->tg_pt_gp_valid_id) 2981 return 0; 2982 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 2983 } 2984 2985 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item, 2986 const char *page, size_t count) 2987 { 2988 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2989 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2990 unsigned long tg_pt_gp_id; 2991 int ret; 2992 2993 ret = kstrtoul(page, 0, &tg_pt_gp_id); 2994 if (ret < 0) { 2995 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n", 2996 page); 2997 return ret; 2998 } 2999 if (tg_pt_gp_id > 0x0000ffff) { 3000 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n", 3001 tg_pt_gp_id); 3002 return -EINVAL; 3003 } 3004 3005 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 3006 if (ret < 0) 3007 return -EINVAL; 3008 3009 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 3010 "core/alua/tg_pt_gps/%s to ID: %hu\n", 3011 config_item_name(&alua_tg_pt_gp_cg->cg_item), 3012 tg_pt_gp->tg_pt_gp_id); 3013 3014 return count; 3015 } 3016 3017 static ssize_t target_tg_pt_gp_members_show(struct config_item *item, 3018 char *page) 3019 { 3020 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3021 struct se_lun *lun; 3022 ssize_t len = 0, cur_len; 3023 unsigned char buf[TG_PT_GROUP_NAME_BUF]; 3024 3025 memset(buf, 0, TG_PT_GROUP_NAME_BUF); 3026 3027 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 3028 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, 3029 lun_tg_pt_gp_link) { 3030 struct se_portal_group *tpg = lun->lun_tpg; 3031 3032 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 3033 "/%s\n", tpg->se_tpg_tfo->fabric_name, 3034 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 3035 tpg->se_tpg_tfo->tpg_get_tag(tpg), 3036 config_item_name(&lun->lun_group.cg_item)); 3037 cur_len++; /* Extra byte for NULL terminator */ 3038 3039 if ((cur_len + len) > PAGE_SIZE) { 3040 pr_warn("Ran out of lu_gp_show_attr" 3041 "_members buffer\n"); 3042 break; 3043 } 3044 memcpy(page+len, buf, cur_len); 3045 len += cur_len; 3046 } 3047 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 3048 3049 return len; 3050 } 3051 3052 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state); 3053 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status); 3054 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type); 3055 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning); 3056 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline); 3057 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent); 3058 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable); 3059 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby); 3060 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized); 3061 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized); 3062 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata); 3063 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs); 3064 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs); 3065 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs); 3066 CONFIGFS_ATTR(target_tg_pt_gp_, preferred); 3067 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id); 3068 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members); 3069 3070 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 3071 &target_tg_pt_gp_attr_alua_access_state, 3072 &target_tg_pt_gp_attr_alua_access_status, 3073 &target_tg_pt_gp_attr_alua_access_type, 3074 &target_tg_pt_gp_attr_alua_support_transitioning, 3075 &target_tg_pt_gp_attr_alua_support_offline, 3076 &target_tg_pt_gp_attr_alua_support_lba_dependent, 3077 &target_tg_pt_gp_attr_alua_support_unavailable, 3078 &target_tg_pt_gp_attr_alua_support_standby, 3079 &target_tg_pt_gp_attr_alua_support_active_nonoptimized, 3080 &target_tg_pt_gp_attr_alua_support_active_optimized, 3081 &target_tg_pt_gp_attr_alua_write_metadata, 3082 &target_tg_pt_gp_attr_nonop_delay_msecs, 3083 &target_tg_pt_gp_attr_trans_delay_msecs, 3084 &target_tg_pt_gp_attr_implicit_trans_secs, 3085 &target_tg_pt_gp_attr_preferred, 3086 &target_tg_pt_gp_attr_tg_pt_gp_id, 3087 &target_tg_pt_gp_attr_members, 3088 NULL, 3089 }; 3090 3091 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 3092 { 3093 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3094 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3095 3096 core_alua_free_tg_pt_gp(tg_pt_gp); 3097 } 3098 3099 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 3100 .release = target_core_alua_tg_pt_gp_release, 3101 }; 3102 3103 static const struct config_item_type target_core_alua_tg_pt_gp_cit = { 3104 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 3105 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 3106 .ct_owner = THIS_MODULE, 3107 }; 3108 3109 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 3110 3111 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3112 3113 static struct config_group *target_core_alua_create_tg_pt_gp( 3114 struct config_group *group, 3115 const char *name) 3116 { 3117 struct t10_alua *alua = container_of(group, struct t10_alua, 3118 alua_tg_pt_gps_group); 3119 struct t10_alua_tg_pt_gp *tg_pt_gp; 3120 struct config_group *alua_tg_pt_gp_cg = NULL; 3121 struct config_item *alua_tg_pt_gp_ci = NULL; 3122 3123 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0); 3124 if (!tg_pt_gp) 3125 return NULL; 3126 3127 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 3128 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 3129 3130 config_group_init_type_name(alua_tg_pt_gp_cg, name, 3131 &target_core_alua_tg_pt_gp_cit); 3132 3133 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 3134 " Group: alua/tg_pt_gps/%s\n", 3135 config_item_name(alua_tg_pt_gp_ci)); 3136 3137 return alua_tg_pt_gp_cg; 3138 } 3139 3140 static void target_core_alua_drop_tg_pt_gp( 3141 struct config_group *group, 3142 struct config_item *item) 3143 { 3144 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3145 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3146 3147 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 3148 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 3149 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 3150 /* 3151 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 3152 * -> target_core_alua_tg_pt_gp_release(). 3153 */ 3154 config_item_put(item); 3155 } 3156 3157 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 3158 .make_group = &target_core_alua_create_tg_pt_gp, 3159 .drop_item = &target_core_alua_drop_tg_pt_gp, 3160 }; 3161 3162 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL); 3163 3164 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3165 3166 /* Start functions for struct config_item_type target_core_alua_cit */ 3167 3168 /* 3169 * target_core_alua_cit is a ConfigFS group that lives under 3170 * /sys/kernel/config/target/core/alua. There are default groups 3171 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 3172 * target_core_alua_cit in target_core_init_configfs() below. 3173 */ 3174 static const struct config_item_type target_core_alua_cit = { 3175 .ct_item_ops = NULL, 3176 .ct_attrs = NULL, 3177 .ct_owner = THIS_MODULE, 3178 }; 3179 3180 /* End functions for struct config_item_type target_core_alua_cit */ 3181 3182 /* Start functions for struct config_item_type tb_dev_stat_cit */ 3183 3184 static struct config_group *target_core_stat_mkdir( 3185 struct config_group *group, 3186 const char *name) 3187 { 3188 return ERR_PTR(-ENOSYS); 3189 } 3190 3191 static void target_core_stat_rmdir( 3192 struct config_group *group, 3193 struct config_item *item) 3194 { 3195 return; 3196 } 3197 3198 static struct configfs_group_operations target_core_stat_group_ops = { 3199 .make_group = &target_core_stat_mkdir, 3200 .drop_item = &target_core_stat_rmdir, 3201 }; 3202 3203 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL); 3204 3205 /* End functions for struct config_item_type tb_dev_stat_cit */ 3206 3207 /* Start functions for struct config_item_type target_core_hba_cit */ 3208 3209 static struct config_group *target_core_make_subdev( 3210 struct config_group *group, 3211 const char *name) 3212 { 3213 struct t10_alua_tg_pt_gp *tg_pt_gp; 3214 struct config_item *hba_ci = &group->cg_item; 3215 struct se_hba *hba = item_to_hba(hba_ci); 3216 struct target_backend *tb = hba->backend; 3217 struct se_device *dev; 3218 int errno = -ENOMEM, ret; 3219 3220 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 3221 if (ret) 3222 return ERR_PTR(ret); 3223 3224 dev = target_alloc_device(hba, name); 3225 if (!dev) 3226 goto out_unlock; 3227 3228 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit); 3229 3230 config_group_init_type_name(&dev->dev_action_group, "action", 3231 &tb->tb_dev_action_cit); 3232 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group); 3233 3234 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib", 3235 &tb->tb_dev_attrib_cit); 3236 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group); 3237 3238 config_group_init_type_name(&dev->dev_pr_group, "pr", 3239 &tb->tb_dev_pr_cit); 3240 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group); 3241 3242 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn", 3243 &tb->tb_dev_wwn_cit); 3244 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group, 3245 &dev->dev_group); 3246 3247 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group, 3248 "alua", &tb->tb_dev_alua_tg_pt_gps_cit); 3249 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group, 3250 &dev->dev_group); 3251 3252 config_group_init_type_name(&dev->dev_stat_grps.stat_group, 3253 "statistics", &tb->tb_dev_stat_cit); 3254 configfs_add_default_group(&dev->dev_stat_grps.stat_group, 3255 &dev->dev_group); 3256 3257 /* 3258 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 3259 */ 3260 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1); 3261 if (!tg_pt_gp) 3262 goto out_free_device; 3263 dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 3264 3265 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 3266 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 3267 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group, 3268 &dev->t10_alua.alua_tg_pt_gps_group); 3269 3270 /* 3271 * Add core/$HBA/$DEV/statistics/ default groups 3272 */ 3273 target_stat_setup_dev_default_groups(dev); 3274 3275 mutex_unlock(&hba->hba_access_mutex); 3276 return &dev->dev_group; 3277 3278 out_free_device: 3279 target_free_device(dev); 3280 out_unlock: 3281 mutex_unlock(&hba->hba_access_mutex); 3282 return ERR_PTR(errno); 3283 } 3284 3285 static void target_core_drop_subdev( 3286 struct config_group *group, 3287 struct config_item *item) 3288 { 3289 struct config_group *dev_cg = to_config_group(item); 3290 struct se_device *dev = 3291 container_of(dev_cg, struct se_device, dev_group); 3292 struct se_hba *hba; 3293 3294 hba = item_to_hba(&dev->se_hba->hba_group.cg_item); 3295 3296 mutex_lock(&hba->hba_access_mutex); 3297 3298 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group); 3299 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group); 3300 3301 /* 3302 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 3303 * directly from target_core_alua_tg_pt_gp_release(). 3304 */ 3305 dev->t10_alua.default_tg_pt_gp = NULL; 3306 3307 configfs_remove_default_groups(dev_cg); 3308 3309 /* 3310 * se_dev is released from target_core_dev_item_ops->release() 3311 */ 3312 config_item_put(item); 3313 mutex_unlock(&hba->hba_access_mutex); 3314 } 3315 3316 static struct configfs_group_operations target_core_hba_group_ops = { 3317 .make_group = target_core_make_subdev, 3318 .drop_item = target_core_drop_subdev, 3319 }; 3320 3321 3322 static inline struct se_hba *to_hba(struct config_item *item) 3323 { 3324 return container_of(to_config_group(item), struct se_hba, hba_group); 3325 } 3326 3327 static ssize_t target_hba_info_show(struct config_item *item, char *page) 3328 { 3329 struct se_hba *hba = to_hba(item); 3330 3331 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 3332 hba->hba_id, hba->backend->ops->name, 3333 TARGET_CORE_VERSION); 3334 } 3335 3336 static ssize_t target_hba_mode_show(struct config_item *item, char *page) 3337 { 3338 struct se_hba *hba = to_hba(item); 3339 int hba_mode = 0; 3340 3341 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 3342 hba_mode = 1; 3343 3344 return sprintf(page, "%d\n", hba_mode); 3345 } 3346 3347 static ssize_t target_hba_mode_store(struct config_item *item, 3348 const char *page, size_t count) 3349 { 3350 struct se_hba *hba = to_hba(item); 3351 unsigned long mode_flag; 3352 int ret; 3353 3354 if (hba->backend->ops->pmode_enable_hba == NULL) 3355 return -EINVAL; 3356 3357 ret = kstrtoul(page, 0, &mode_flag); 3358 if (ret < 0) { 3359 pr_err("Unable to extract hba mode flag: %d\n", ret); 3360 return ret; 3361 } 3362 3363 if (hba->dev_count) { 3364 pr_err("Unable to set hba_mode with active devices\n"); 3365 return -EINVAL; 3366 } 3367 3368 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag); 3369 if (ret < 0) 3370 return -EINVAL; 3371 if (ret > 0) 3372 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 3373 else if (ret == 0) 3374 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 3375 3376 return count; 3377 } 3378 3379 CONFIGFS_ATTR_RO(target_, hba_info); 3380 CONFIGFS_ATTR(target_, hba_mode); 3381 3382 static void target_core_hba_release(struct config_item *item) 3383 { 3384 struct se_hba *hba = container_of(to_config_group(item), 3385 struct se_hba, hba_group); 3386 core_delete_hba(hba); 3387 } 3388 3389 static struct configfs_attribute *target_core_hba_attrs[] = { 3390 &target_attr_hba_info, 3391 &target_attr_hba_mode, 3392 NULL, 3393 }; 3394 3395 static struct configfs_item_operations target_core_hba_item_ops = { 3396 .release = target_core_hba_release, 3397 }; 3398 3399 static const struct config_item_type target_core_hba_cit = { 3400 .ct_item_ops = &target_core_hba_item_ops, 3401 .ct_group_ops = &target_core_hba_group_ops, 3402 .ct_attrs = target_core_hba_attrs, 3403 .ct_owner = THIS_MODULE, 3404 }; 3405 3406 static struct config_group *target_core_call_addhbatotarget( 3407 struct config_group *group, 3408 const char *name) 3409 { 3410 char *se_plugin_str, *str, *str2; 3411 struct se_hba *hba; 3412 char buf[TARGET_CORE_NAME_MAX_LEN]; 3413 unsigned long plugin_dep_id = 0; 3414 int ret; 3415 3416 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN); 3417 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 3418 pr_err("Passed *name strlen(): %d exceeds" 3419 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 3420 TARGET_CORE_NAME_MAX_LEN); 3421 return ERR_PTR(-ENAMETOOLONG); 3422 } 3423 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 3424 3425 str = strstr(buf, "_"); 3426 if (!str) { 3427 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 3428 return ERR_PTR(-EINVAL); 3429 } 3430 se_plugin_str = buf; 3431 /* 3432 * Special case for subsystem plugins that have "_" in their names. 3433 * Namely rd_direct and rd_mcp.. 3434 */ 3435 str2 = strstr(str+1, "_"); 3436 if (str2) { 3437 *str2 = '\0'; /* Terminate for *se_plugin_str */ 3438 str2++; /* Skip to start of plugin dependent ID */ 3439 str = str2; 3440 } else { 3441 *str = '\0'; /* Terminate for *se_plugin_str */ 3442 str++; /* Skip to start of plugin dependent ID */ 3443 } 3444 3445 ret = kstrtoul(str, 0, &plugin_dep_id); 3446 if (ret < 0) { 3447 pr_err("kstrtoul() returned %d for" 3448 " plugin_dep_id\n", ret); 3449 return ERR_PTR(ret); 3450 } 3451 /* 3452 * Load up TCM subsystem plugins if they have not already been loaded. 3453 */ 3454 transport_subsystem_check_init(); 3455 3456 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 3457 if (IS_ERR(hba)) 3458 return ERR_CAST(hba); 3459 3460 config_group_init_type_name(&hba->hba_group, name, 3461 &target_core_hba_cit); 3462 3463 return &hba->hba_group; 3464 } 3465 3466 static void target_core_call_delhbafromtarget( 3467 struct config_group *group, 3468 struct config_item *item) 3469 { 3470 /* 3471 * core_delete_hba() is called from target_core_hba_item_ops->release() 3472 * -> target_core_hba_release() 3473 */ 3474 config_item_put(item); 3475 } 3476 3477 static struct configfs_group_operations target_core_group_ops = { 3478 .make_group = target_core_call_addhbatotarget, 3479 .drop_item = target_core_call_delhbafromtarget, 3480 }; 3481 3482 static const struct config_item_type target_core_cit = { 3483 .ct_item_ops = NULL, 3484 .ct_group_ops = &target_core_group_ops, 3485 .ct_attrs = NULL, 3486 .ct_owner = THIS_MODULE, 3487 }; 3488 3489 /* Stop functions for struct config_item_type target_core_hba_cit */ 3490 3491 void target_setup_backend_cits(struct target_backend *tb) 3492 { 3493 target_core_setup_dev_cit(tb); 3494 target_core_setup_dev_action_cit(tb); 3495 target_core_setup_dev_attrib_cit(tb); 3496 target_core_setup_dev_pr_cit(tb); 3497 target_core_setup_dev_wwn_cit(tb); 3498 target_core_setup_dev_alua_tg_pt_gps_cit(tb); 3499 target_core_setup_dev_stat_cit(tb); 3500 } 3501 3502 static void target_init_dbroot(void) 3503 { 3504 struct file *fp; 3505 3506 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED); 3507 fp = filp_open(db_root_stage, O_RDONLY, 0); 3508 if (IS_ERR(fp)) { 3509 pr_err("db_root: cannot open: %s\n", db_root_stage); 3510 return; 3511 } 3512 if (!S_ISDIR(file_inode(fp)->i_mode)) { 3513 filp_close(fp, NULL); 3514 pr_err("db_root: not a valid directory: %s\n", db_root_stage); 3515 return; 3516 } 3517 filp_close(fp, NULL); 3518 3519 strncpy(db_root, db_root_stage, DB_ROOT_LEN); 3520 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); 3521 } 3522 3523 static int __init target_core_init_configfs(void) 3524 { 3525 struct configfs_subsystem *subsys = &target_core_fabrics; 3526 struct t10_alua_lu_gp *lu_gp; 3527 int ret; 3528 3529 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 3530 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3531 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3532 3533 config_group_init(&subsys->su_group); 3534 mutex_init(&subsys->su_mutex); 3535 3536 ret = init_se_kmem_caches(); 3537 if (ret < 0) 3538 return ret; 3539 /* 3540 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3541 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3542 */ 3543 config_group_init_type_name(&target_core_hbagroup, "core", 3544 &target_core_cit); 3545 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group); 3546 3547 /* 3548 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3549 */ 3550 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit); 3551 configfs_add_default_group(&alua_group, &target_core_hbagroup); 3552 3553 /* 3554 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3555 * groups under /sys/kernel/config/target/core/alua/ 3556 */ 3557 config_group_init_type_name(&alua_lu_gps_group, "lu_gps", 3558 &target_core_alua_lu_gps_cit); 3559 configfs_add_default_group(&alua_lu_gps_group, &alua_group); 3560 3561 /* 3562 * Add core/alua/lu_gps/default_lu_gp 3563 */ 3564 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3565 if (IS_ERR(lu_gp)) { 3566 ret = -ENOMEM; 3567 goto out_global; 3568 } 3569 3570 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3571 &target_core_alua_lu_gp_cit); 3572 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group); 3573 3574 default_lu_gp = lu_gp; 3575 3576 /* 3577 * Register the target_core_mod subsystem with configfs. 3578 */ 3579 ret = configfs_register_subsystem(subsys); 3580 if (ret < 0) { 3581 pr_err("Error %d while registering subsystem %s\n", 3582 ret, subsys->su_group.cg_item.ci_namebuf); 3583 goto out_global; 3584 } 3585 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 3586 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s" 3587 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3588 /* 3589 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3590 */ 3591 ret = rd_module_init(); 3592 if (ret < 0) 3593 goto out; 3594 3595 ret = core_dev_setup_virtual_lun0(); 3596 if (ret < 0) 3597 goto out; 3598 3599 ret = target_xcopy_setup_pt(); 3600 if (ret < 0) 3601 goto out; 3602 3603 target_init_dbroot(); 3604 3605 return 0; 3606 3607 out: 3608 configfs_unregister_subsystem(subsys); 3609 core_dev_release_virtual_lun0(); 3610 rd_module_exit(); 3611 out_global: 3612 if (default_lu_gp) { 3613 core_alua_free_lu_gp(default_lu_gp); 3614 default_lu_gp = NULL; 3615 } 3616 release_se_kmem_caches(); 3617 return ret; 3618 } 3619 3620 static void __exit target_core_exit_configfs(void) 3621 { 3622 configfs_remove_default_groups(&alua_lu_gps_group); 3623 configfs_remove_default_groups(&alua_group); 3624 configfs_remove_default_groups(&target_core_hbagroup); 3625 3626 /* 3627 * We expect subsys->su_group.default_groups to be released 3628 * by configfs subsystem provider logic.. 3629 */ 3630 configfs_unregister_subsystem(&target_core_fabrics); 3631 3632 core_alua_free_lu_gp(default_lu_gp); 3633 default_lu_gp = NULL; 3634 3635 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3636 " Infrastructure\n"); 3637 3638 core_dev_release_virtual_lun0(); 3639 rd_module_exit(); 3640 target_xcopy_release_pt(); 3641 release_se_kmem_caches(); 3642 } 3643 3644 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3645 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3646 MODULE_LICENSE("GPL"); 3647 3648 module_init(target_core_init_configfs); 3649 module_exit(target_core_exit_configfs); 3650