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 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 1540 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 1541 "%s", strstrip(buf)); 1542 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL; 1543 1544 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 1545 " %s\n", dev->t10_wwn.unit_serial); 1546 1547 return count; 1548 } 1549 1550 /* 1551 * VPD page 0x83 Protocol Identifier 1552 */ 1553 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item, 1554 char *page) 1555 { 1556 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1557 struct t10_vpd *vpd; 1558 unsigned char buf[VPD_TMP_BUF_SIZE] = { }; 1559 ssize_t len = 0; 1560 1561 spin_lock(&t10_wwn->t10_vpd_lock); 1562 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 1563 if (!vpd->protocol_identifier_set) 1564 continue; 1565 1566 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 1567 1568 if (len + strlen(buf) >= PAGE_SIZE) 1569 break; 1570 1571 len += sprintf(page+len, "%s", buf); 1572 } 1573 spin_unlock(&t10_wwn->t10_vpd_lock); 1574 1575 return len; 1576 } 1577 1578 /* 1579 * Generic wrapper for dumping VPD identifiers by association. 1580 */ 1581 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 1582 static ssize_t target_wwn_##_name##_show(struct config_item *item, \ 1583 char *page) \ 1584 { \ 1585 struct t10_wwn *t10_wwn = to_t10_wwn(item); \ 1586 struct t10_vpd *vpd; \ 1587 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 1588 ssize_t len = 0; \ 1589 \ 1590 spin_lock(&t10_wwn->t10_vpd_lock); \ 1591 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 1592 if (vpd->association != _assoc) \ 1593 continue; \ 1594 \ 1595 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1596 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 1597 if (len + strlen(buf) >= PAGE_SIZE) \ 1598 break; \ 1599 len += sprintf(page+len, "%s", buf); \ 1600 \ 1601 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1602 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 1603 if (len + strlen(buf) >= PAGE_SIZE) \ 1604 break; \ 1605 len += sprintf(page+len, "%s", buf); \ 1606 \ 1607 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1608 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 1609 if (len + strlen(buf) >= PAGE_SIZE) \ 1610 break; \ 1611 len += sprintf(page+len, "%s", buf); \ 1612 } \ 1613 spin_unlock(&t10_wwn->t10_vpd_lock); \ 1614 \ 1615 return len; \ 1616 } 1617 1618 /* VPD page 0x83 Association: Logical Unit */ 1619 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 1620 /* VPD page 0x83 Association: Target Port */ 1621 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 1622 /* VPD page 0x83 Association: SCSI Target Device */ 1623 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 1624 1625 CONFIGFS_ATTR(target_wwn_, vendor_id); 1626 CONFIGFS_ATTR(target_wwn_, product_id); 1627 CONFIGFS_ATTR(target_wwn_, revision); 1628 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial); 1629 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier); 1630 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit); 1631 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port); 1632 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device); 1633 1634 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 1635 &target_wwn_attr_vendor_id, 1636 &target_wwn_attr_product_id, 1637 &target_wwn_attr_revision, 1638 &target_wwn_attr_vpd_unit_serial, 1639 &target_wwn_attr_vpd_protocol_identifier, 1640 &target_wwn_attr_vpd_assoc_logical_unit, 1641 &target_wwn_attr_vpd_assoc_target_port, 1642 &target_wwn_attr_vpd_assoc_scsi_target_device, 1643 NULL, 1644 }; 1645 1646 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs); 1647 1648 /* End functions for struct config_item_type tb_dev_wwn_cit */ 1649 1650 /* Start functions for struct config_item_type tb_dev_pr_cit */ 1651 1652 static struct se_device *pr_to_dev(struct config_item *item) 1653 { 1654 return container_of(to_config_group(item), struct se_device, 1655 dev_pr_group); 1656 } 1657 1658 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev, 1659 char *page) 1660 { 1661 struct se_node_acl *se_nacl; 1662 struct t10_pr_registration *pr_reg; 1663 char i_buf[PR_REG_ISID_ID_LEN] = { }; 1664 1665 pr_reg = dev->dev_pr_res_holder; 1666 if (!pr_reg) 1667 return sprintf(page, "No SPC-3 Reservation holder\n"); 1668 1669 se_nacl = pr_reg->pr_reg_nacl; 1670 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1671 1672 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", 1673 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1674 se_nacl->initiatorname, i_buf); 1675 } 1676 1677 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, 1678 char *page) 1679 { 1680 struct se_session *sess = dev->reservation_holder; 1681 struct se_node_acl *se_nacl; 1682 ssize_t len; 1683 1684 if (sess) { 1685 se_nacl = sess->se_node_acl; 1686 len = sprintf(page, 1687 "SPC-2 Reservation: %s Initiator: %s\n", 1688 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1689 se_nacl->initiatorname); 1690 } else { 1691 len = sprintf(page, "No SPC-2 Reservation holder\n"); 1692 } 1693 return len; 1694 } 1695 1696 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page) 1697 { 1698 struct se_device *dev = pr_to_dev(item); 1699 int ret; 1700 1701 if (!dev->dev_attrib.emulate_pr) 1702 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 1703 1704 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1705 return sprintf(page, "Passthrough\n"); 1706 1707 spin_lock(&dev->dev_reservation_lock); 1708 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1709 ret = target_core_dev_pr_show_spc2_res(dev, page); 1710 else 1711 ret = target_core_dev_pr_show_spc3_res(dev, page); 1712 spin_unlock(&dev->dev_reservation_lock); 1713 return ret; 1714 } 1715 1716 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item, 1717 char *page) 1718 { 1719 struct se_device *dev = pr_to_dev(item); 1720 ssize_t len = 0; 1721 1722 spin_lock(&dev->dev_reservation_lock); 1723 if (!dev->dev_pr_res_holder) { 1724 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1725 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { 1726 len = sprintf(page, "SPC-3 Reservation: All Target" 1727 " Ports registration\n"); 1728 } else { 1729 len = sprintf(page, "SPC-3 Reservation: Single" 1730 " Target Port registration\n"); 1731 } 1732 1733 spin_unlock(&dev->dev_reservation_lock); 1734 return len; 1735 } 1736 1737 static ssize_t target_pr_res_pr_generation_show(struct config_item *item, 1738 char *page) 1739 { 1740 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation); 1741 } 1742 1743 1744 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item, 1745 char *page) 1746 { 1747 struct se_device *dev = pr_to_dev(item); 1748 struct se_node_acl *se_nacl; 1749 struct se_portal_group *se_tpg; 1750 struct t10_pr_registration *pr_reg; 1751 const struct target_core_fabric_ops *tfo; 1752 ssize_t len = 0; 1753 1754 spin_lock(&dev->dev_reservation_lock); 1755 pr_reg = dev->dev_pr_res_holder; 1756 if (!pr_reg) { 1757 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1758 goto out_unlock; 1759 } 1760 1761 se_nacl = pr_reg->pr_reg_nacl; 1762 se_tpg = se_nacl->se_tpg; 1763 tfo = se_tpg->se_tpg_tfo; 1764 1765 len += sprintf(page+len, "SPC-3 Reservation: %s" 1766 " Target Node Endpoint: %s\n", tfo->fabric_name, 1767 tfo->tpg_get_wwn(se_tpg)); 1768 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1769 " Identifier Tag: %hu %s Portal Group Tag: %hu" 1770 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi, 1771 tfo->fabric_name, tfo->tpg_get_tag(se_tpg), 1772 tfo->fabric_name, pr_reg->pr_aptpl_target_lun); 1773 1774 out_unlock: 1775 spin_unlock(&dev->dev_reservation_lock); 1776 return len; 1777 } 1778 1779 1780 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item, 1781 char *page) 1782 { 1783 struct se_device *dev = pr_to_dev(item); 1784 const struct target_core_fabric_ops *tfo; 1785 struct t10_pr_registration *pr_reg; 1786 unsigned char buf[384]; 1787 char i_buf[PR_REG_ISID_ID_LEN]; 1788 ssize_t len = 0; 1789 int reg_count = 0; 1790 1791 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1792 1793 spin_lock(&dev->t10_pr.registration_lock); 1794 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1795 pr_reg_list) { 1796 1797 memset(buf, 0, 384); 1798 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1799 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1800 core_pr_dump_initiator_port(pr_reg, i_buf, 1801 PR_REG_ISID_ID_LEN); 1802 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1803 tfo->fabric_name, 1804 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, 1805 pr_reg->pr_res_generation); 1806 1807 if (len + strlen(buf) >= PAGE_SIZE) 1808 break; 1809 1810 len += sprintf(page+len, "%s", buf); 1811 reg_count++; 1812 } 1813 spin_unlock(&dev->t10_pr.registration_lock); 1814 1815 if (!reg_count) 1816 len += sprintf(page+len, "None\n"); 1817 1818 return len; 1819 } 1820 1821 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page) 1822 { 1823 struct se_device *dev = pr_to_dev(item); 1824 struct t10_pr_registration *pr_reg; 1825 ssize_t len = 0; 1826 1827 spin_lock(&dev->dev_reservation_lock); 1828 pr_reg = dev->dev_pr_res_holder; 1829 if (pr_reg) { 1830 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1831 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 1832 } else { 1833 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1834 } 1835 1836 spin_unlock(&dev->dev_reservation_lock); 1837 return len; 1838 } 1839 1840 static ssize_t target_pr_res_type_show(struct config_item *item, char *page) 1841 { 1842 struct se_device *dev = pr_to_dev(item); 1843 1844 if (!dev->dev_attrib.emulate_pr) 1845 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 1846 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1847 return sprintf(page, "SPC_PASSTHROUGH\n"); 1848 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1849 return sprintf(page, "SPC2_RESERVATIONS\n"); 1850 1851 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 1852 } 1853 1854 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item, 1855 char *page) 1856 { 1857 struct se_device *dev = pr_to_dev(item); 1858 1859 if (!dev->dev_attrib.emulate_pr || 1860 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 1861 return 0; 1862 1863 return sprintf(page, "APTPL Bit Status: %s\n", 1864 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 1865 } 1866 1867 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item, 1868 char *page) 1869 { 1870 struct se_device *dev = pr_to_dev(item); 1871 1872 if (!dev->dev_attrib.emulate_pr || 1873 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 1874 return 0; 1875 1876 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 1877 } 1878 1879 enum { 1880 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 1881 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 1882 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 1883 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 1884 }; 1885 1886 static match_table_t tokens = { 1887 {Opt_initiator_fabric, "initiator_fabric=%s"}, 1888 {Opt_initiator_node, "initiator_node=%s"}, 1889 {Opt_initiator_sid, "initiator_sid=%s"}, 1890 {Opt_sa_res_key, "sa_res_key=%s"}, 1891 {Opt_res_holder, "res_holder=%d"}, 1892 {Opt_res_type, "res_type=%d"}, 1893 {Opt_res_scope, "res_scope=%d"}, 1894 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 1895 {Opt_mapped_lun, "mapped_lun=%u"}, 1896 {Opt_target_fabric, "target_fabric=%s"}, 1897 {Opt_target_node, "target_node=%s"}, 1898 {Opt_tpgt, "tpgt=%d"}, 1899 {Opt_port_rtpi, "port_rtpi=%d"}, 1900 {Opt_target_lun, "target_lun=%u"}, 1901 {Opt_err, NULL} 1902 }; 1903 1904 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item, 1905 const char *page, size_t count) 1906 { 1907 struct se_device *dev = pr_to_dev(item); 1908 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 1909 unsigned char *t_fabric = NULL, *t_port = NULL; 1910 char *orig, *ptr, *opts; 1911 substring_t args[MAX_OPT_ARGS]; 1912 unsigned long long tmp_ll; 1913 u64 sa_res_key = 0; 1914 u64 mapped_lun = 0, target_lun = 0; 1915 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 1916 u16 tpgt = 0; 1917 u8 type = 0; 1918 1919 if (!dev->dev_attrib.emulate_pr || 1920 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 1921 return count; 1922 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1923 return count; 1924 1925 if (dev->export_count) { 1926 pr_debug("Unable to process APTPL metadata while" 1927 " active fabric exports exist\n"); 1928 return -EINVAL; 1929 } 1930 1931 opts = kstrdup(page, GFP_KERNEL); 1932 if (!opts) 1933 return -ENOMEM; 1934 1935 orig = opts; 1936 while ((ptr = strsep(&opts, ",\n")) != NULL) { 1937 if (!*ptr) 1938 continue; 1939 1940 token = match_token(ptr, tokens, args); 1941 switch (token) { 1942 case Opt_initiator_fabric: 1943 i_fabric = match_strdup(args); 1944 if (!i_fabric) { 1945 ret = -ENOMEM; 1946 goto out; 1947 } 1948 break; 1949 case Opt_initiator_node: 1950 i_port = match_strdup(args); 1951 if (!i_port) { 1952 ret = -ENOMEM; 1953 goto out; 1954 } 1955 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 1956 pr_err("APTPL metadata initiator_node=" 1957 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 1958 PR_APTPL_MAX_IPORT_LEN); 1959 ret = -EINVAL; 1960 break; 1961 } 1962 break; 1963 case Opt_initiator_sid: 1964 isid = match_strdup(args); 1965 if (!isid) { 1966 ret = -ENOMEM; 1967 goto out; 1968 } 1969 if (strlen(isid) >= PR_REG_ISID_LEN) { 1970 pr_err("APTPL metadata initiator_isid" 1971 "= exceeds PR_REG_ISID_LEN: %d\n", 1972 PR_REG_ISID_LEN); 1973 ret = -EINVAL; 1974 break; 1975 } 1976 break; 1977 case Opt_sa_res_key: 1978 ret = match_u64(args, &tmp_ll); 1979 if (ret < 0) { 1980 pr_err("kstrtoull() failed for sa_res_key=\n"); 1981 goto out; 1982 } 1983 sa_res_key = (u64)tmp_ll; 1984 break; 1985 /* 1986 * PR APTPL Metadata for Reservation 1987 */ 1988 case Opt_res_holder: 1989 ret = match_int(args, &arg); 1990 if (ret) 1991 goto out; 1992 res_holder = arg; 1993 break; 1994 case Opt_res_type: 1995 ret = match_int(args, &arg); 1996 if (ret) 1997 goto out; 1998 type = (u8)arg; 1999 break; 2000 case Opt_res_scope: 2001 ret = match_int(args, &arg); 2002 if (ret) 2003 goto out; 2004 break; 2005 case Opt_res_all_tg_pt: 2006 ret = match_int(args, &arg); 2007 if (ret) 2008 goto out; 2009 all_tg_pt = (int)arg; 2010 break; 2011 case Opt_mapped_lun: 2012 ret = match_u64(args, &tmp_ll); 2013 if (ret) 2014 goto out; 2015 mapped_lun = (u64)tmp_ll; 2016 break; 2017 /* 2018 * PR APTPL Metadata for Target Port 2019 */ 2020 case Opt_target_fabric: 2021 t_fabric = match_strdup(args); 2022 if (!t_fabric) { 2023 ret = -ENOMEM; 2024 goto out; 2025 } 2026 break; 2027 case Opt_target_node: 2028 t_port = match_strdup(args); 2029 if (!t_port) { 2030 ret = -ENOMEM; 2031 goto out; 2032 } 2033 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 2034 pr_err("APTPL metadata target_node=" 2035 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 2036 PR_APTPL_MAX_TPORT_LEN); 2037 ret = -EINVAL; 2038 break; 2039 } 2040 break; 2041 case Opt_tpgt: 2042 ret = match_int(args, &arg); 2043 if (ret) 2044 goto out; 2045 tpgt = (u16)arg; 2046 break; 2047 case Opt_port_rtpi: 2048 ret = match_int(args, &arg); 2049 if (ret) 2050 goto out; 2051 break; 2052 case Opt_target_lun: 2053 ret = match_u64(args, &tmp_ll); 2054 if (ret) 2055 goto out; 2056 target_lun = (u64)tmp_ll; 2057 break; 2058 default: 2059 break; 2060 } 2061 } 2062 2063 if (!i_port || !t_port || !sa_res_key) { 2064 pr_err("Illegal parameters for APTPL registration\n"); 2065 ret = -EINVAL; 2066 goto out; 2067 } 2068 2069 if (res_holder && !(type)) { 2070 pr_err("Illegal PR type: 0x%02x for reservation" 2071 " holder\n", type); 2072 ret = -EINVAL; 2073 goto out; 2074 } 2075 2076 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, 2077 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 2078 res_holder, all_tg_pt, type); 2079 out: 2080 kfree(i_fabric); 2081 kfree(i_port); 2082 kfree(isid); 2083 kfree(t_fabric); 2084 kfree(t_port); 2085 kfree(orig); 2086 return (ret == 0) ? count : ret; 2087 } 2088 2089 2090 CONFIGFS_ATTR_RO(target_pr_, res_holder); 2091 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts); 2092 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation); 2093 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port); 2094 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts); 2095 CONFIGFS_ATTR_RO(target_pr_, res_pr_type); 2096 CONFIGFS_ATTR_RO(target_pr_, res_type); 2097 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active); 2098 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata); 2099 2100 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 2101 &target_pr_attr_res_holder, 2102 &target_pr_attr_res_pr_all_tgt_pts, 2103 &target_pr_attr_res_pr_generation, 2104 &target_pr_attr_res_pr_holder_tg_port, 2105 &target_pr_attr_res_pr_registered_i_pts, 2106 &target_pr_attr_res_pr_type, 2107 &target_pr_attr_res_type, 2108 &target_pr_attr_res_aptpl_active, 2109 &target_pr_attr_res_aptpl_metadata, 2110 NULL, 2111 }; 2112 2113 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs); 2114 2115 /* End functions for struct config_item_type tb_dev_pr_cit */ 2116 2117 /* Start functions for struct config_item_type tb_dev_cit */ 2118 2119 static inline struct se_device *to_device(struct config_item *item) 2120 { 2121 return container_of(to_config_group(item), struct se_device, dev_group); 2122 } 2123 2124 static ssize_t target_dev_info_show(struct config_item *item, char *page) 2125 { 2126 struct se_device *dev = to_device(item); 2127 int bl = 0; 2128 ssize_t read_bytes = 0; 2129 2130 transport_dump_dev_state(dev, page, &bl); 2131 read_bytes += bl; 2132 read_bytes += dev->transport->show_configfs_dev_params(dev, 2133 page+read_bytes); 2134 return read_bytes; 2135 } 2136 2137 static ssize_t target_dev_control_store(struct config_item *item, 2138 const char *page, size_t count) 2139 { 2140 struct se_device *dev = to_device(item); 2141 2142 return dev->transport->set_configfs_dev_params(dev, page, count); 2143 } 2144 2145 static ssize_t target_dev_alias_show(struct config_item *item, char *page) 2146 { 2147 struct se_device *dev = to_device(item); 2148 2149 if (!(dev->dev_flags & DF_USING_ALIAS)) 2150 return 0; 2151 2152 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); 2153 } 2154 2155 static ssize_t target_dev_alias_store(struct config_item *item, 2156 const char *page, size_t count) 2157 { 2158 struct se_device *dev = to_device(item); 2159 struct se_hba *hba = dev->se_hba; 2160 ssize_t read_bytes; 2161 2162 if (count > (SE_DEV_ALIAS_LEN-1)) { 2163 pr_err("alias count: %d exceeds" 2164 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 2165 SE_DEV_ALIAS_LEN-1); 2166 return -EINVAL; 2167 } 2168 2169 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); 2170 if (!read_bytes) 2171 return -EINVAL; 2172 if (dev->dev_alias[read_bytes - 1] == '\n') 2173 dev->dev_alias[read_bytes - 1] = '\0'; 2174 2175 dev->dev_flags |= DF_USING_ALIAS; 2176 2177 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 2178 config_item_name(&hba->hba_group.cg_item), 2179 config_item_name(&dev->dev_group.cg_item), 2180 dev->dev_alias); 2181 2182 return read_bytes; 2183 } 2184 2185 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page) 2186 { 2187 struct se_device *dev = to_device(item); 2188 2189 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) 2190 return 0; 2191 2192 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); 2193 } 2194 2195 static ssize_t target_dev_udev_path_store(struct config_item *item, 2196 const char *page, size_t count) 2197 { 2198 struct se_device *dev = to_device(item); 2199 struct se_hba *hba = dev->se_hba; 2200 ssize_t read_bytes; 2201 2202 if (count > (SE_UDEV_PATH_LEN-1)) { 2203 pr_err("udev_path count: %d exceeds" 2204 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 2205 SE_UDEV_PATH_LEN-1); 2206 return -EINVAL; 2207 } 2208 2209 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, 2210 "%s", page); 2211 if (!read_bytes) 2212 return -EINVAL; 2213 if (dev->udev_path[read_bytes - 1] == '\n') 2214 dev->udev_path[read_bytes - 1] = '\0'; 2215 2216 dev->dev_flags |= DF_USING_UDEV_PATH; 2217 2218 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 2219 config_item_name(&hba->hba_group.cg_item), 2220 config_item_name(&dev->dev_group.cg_item), 2221 dev->udev_path); 2222 2223 return read_bytes; 2224 } 2225 2226 static ssize_t target_dev_enable_show(struct config_item *item, char *page) 2227 { 2228 struct se_device *dev = to_device(item); 2229 2230 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev)); 2231 } 2232 2233 static ssize_t target_dev_enable_store(struct config_item *item, 2234 const char *page, size_t count) 2235 { 2236 struct se_device *dev = to_device(item); 2237 char *ptr; 2238 int ret; 2239 2240 ptr = strstr(page, "1"); 2241 if (!ptr) { 2242 pr_err("For dev_enable ops, only valid value" 2243 " is \"1\"\n"); 2244 return -EINVAL; 2245 } 2246 2247 ret = target_configure_device(dev); 2248 if (ret) 2249 return ret; 2250 return count; 2251 } 2252 2253 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page) 2254 { 2255 struct se_device *dev = to_device(item); 2256 struct config_item *lu_ci; 2257 struct t10_alua_lu_gp *lu_gp; 2258 struct t10_alua_lu_gp_member *lu_gp_mem; 2259 ssize_t len = 0; 2260 2261 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2262 if (!lu_gp_mem) 2263 return 0; 2264 2265 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2266 lu_gp = lu_gp_mem->lu_gp; 2267 if (lu_gp) { 2268 lu_ci = &lu_gp->lu_gp_group.cg_item; 2269 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 2270 config_item_name(lu_ci), lu_gp->lu_gp_id); 2271 } 2272 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2273 2274 return len; 2275 } 2276 2277 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item, 2278 const char *page, size_t count) 2279 { 2280 struct se_device *dev = to_device(item); 2281 struct se_hba *hba = dev->se_hba; 2282 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 2283 struct t10_alua_lu_gp_member *lu_gp_mem; 2284 unsigned char buf[LU_GROUP_NAME_BUF] = { }; 2285 int move = 0; 2286 2287 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2288 if (!lu_gp_mem) 2289 return count; 2290 2291 if (count > LU_GROUP_NAME_BUF) { 2292 pr_err("ALUA LU Group Alias too large!\n"); 2293 return -EINVAL; 2294 } 2295 memcpy(buf, page, count); 2296 /* 2297 * Any ALUA logical unit alias besides "NULL" means we will be 2298 * making a new group association. 2299 */ 2300 if (strcmp(strstrip(buf), "NULL")) { 2301 /* 2302 * core_alua_get_lu_gp_by_name() will increment reference to 2303 * struct t10_alua_lu_gp. This reference is released with 2304 * core_alua_get_lu_gp_by_name below(). 2305 */ 2306 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 2307 if (!lu_gp_new) 2308 return -ENODEV; 2309 } 2310 2311 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2312 lu_gp = lu_gp_mem->lu_gp; 2313 if (lu_gp) { 2314 /* 2315 * Clearing an existing lu_gp association, and replacing 2316 * with NULL 2317 */ 2318 if (!lu_gp_new) { 2319 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 2320 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 2321 " %hu\n", 2322 config_item_name(&hba->hba_group.cg_item), 2323 config_item_name(&dev->dev_group.cg_item), 2324 config_item_name(&lu_gp->lu_gp_group.cg_item), 2325 lu_gp->lu_gp_id); 2326 2327 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2328 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2329 2330 return count; 2331 } 2332 /* 2333 * Removing existing association of lu_gp_mem with lu_gp 2334 */ 2335 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2336 move = 1; 2337 } 2338 /* 2339 * Associate lu_gp_mem with lu_gp_new. 2340 */ 2341 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 2342 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2343 2344 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 2345 " core/alua/lu_gps/%s, ID: %hu\n", 2346 (move) ? "Moving" : "Adding", 2347 config_item_name(&hba->hba_group.cg_item), 2348 config_item_name(&dev->dev_group.cg_item), 2349 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 2350 lu_gp_new->lu_gp_id); 2351 2352 core_alua_put_lu_gp_from_name(lu_gp_new); 2353 return count; 2354 } 2355 2356 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page) 2357 { 2358 struct se_device *dev = to_device(item); 2359 struct t10_alua_lba_map *map; 2360 struct t10_alua_lba_map_member *mem; 2361 char *b = page; 2362 int bl = 0; 2363 char state; 2364 2365 spin_lock(&dev->t10_alua.lba_map_lock); 2366 if (!list_empty(&dev->t10_alua.lba_map_list)) 2367 bl += sprintf(b + bl, "%u %u\n", 2368 dev->t10_alua.lba_map_segment_size, 2369 dev->t10_alua.lba_map_segment_multiplier); 2370 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) { 2371 bl += sprintf(b + bl, "%llu %llu", 2372 map->lba_map_first_lba, map->lba_map_last_lba); 2373 list_for_each_entry(mem, &map->lba_map_mem_list, 2374 lba_map_mem_list) { 2375 switch (mem->lba_map_mem_alua_state) { 2376 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: 2377 state = 'O'; 2378 break; 2379 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: 2380 state = 'A'; 2381 break; 2382 case ALUA_ACCESS_STATE_STANDBY: 2383 state = 'S'; 2384 break; 2385 case ALUA_ACCESS_STATE_UNAVAILABLE: 2386 state = 'U'; 2387 break; 2388 default: 2389 state = '.'; 2390 break; 2391 } 2392 bl += sprintf(b + bl, " %d:%c", 2393 mem->lba_map_mem_alua_pg_id, state); 2394 } 2395 bl += sprintf(b + bl, "\n"); 2396 } 2397 spin_unlock(&dev->t10_alua.lba_map_lock); 2398 return bl; 2399 } 2400 2401 static ssize_t target_dev_lba_map_store(struct config_item *item, 2402 const char *page, size_t count) 2403 { 2404 struct se_device *dev = to_device(item); 2405 struct t10_alua_lba_map *lba_map = NULL; 2406 struct list_head lba_list; 2407 char *map_entries, *orig, *ptr; 2408 char state; 2409 int pg_num = -1, pg; 2410 int ret = 0, num = 0, pg_id, alua_state; 2411 unsigned long start_lba = -1, end_lba = -1; 2412 unsigned long segment_size = -1, segment_mult = -1; 2413 2414 orig = map_entries = kstrdup(page, GFP_KERNEL); 2415 if (!map_entries) 2416 return -ENOMEM; 2417 2418 INIT_LIST_HEAD(&lba_list); 2419 while ((ptr = strsep(&map_entries, "\n")) != NULL) { 2420 if (!*ptr) 2421 continue; 2422 2423 if (num == 0) { 2424 if (sscanf(ptr, "%lu %lu\n", 2425 &segment_size, &segment_mult) != 2) { 2426 pr_err("Invalid line %d\n", num); 2427 ret = -EINVAL; 2428 break; 2429 } 2430 num++; 2431 continue; 2432 } 2433 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) { 2434 pr_err("Invalid line %d\n", num); 2435 ret = -EINVAL; 2436 break; 2437 } 2438 ptr = strchr(ptr, ' '); 2439 if (!ptr) { 2440 pr_err("Invalid line %d, missing end lba\n", num); 2441 ret = -EINVAL; 2442 break; 2443 } 2444 ptr++; 2445 ptr = strchr(ptr, ' '); 2446 if (!ptr) { 2447 pr_err("Invalid line %d, missing state definitions\n", 2448 num); 2449 ret = -EINVAL; 2450 break; 2451 } 2452 ptr++; 2453 lba_map = core_alua_allocate_lba_map(&lba_list, 2454 start_lba, end_lba); 2455 if (IS_ERR(lba_map)) { 2456 ret = PTR_ERR(lba_map); 2457 break; 2458 } 2459 pg = 0; 2460 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) { 2461 switch (state) { 2462 case 'O': 2463 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED; 2464 break; 2465 case 'A': 2466 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED; 2467 break; 2468 case 'S': 2469 alua_state = ALUA_ACCESS_STATE_STANDBY; 2470 break; 2471 case 'U': 2472 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE; 2473 break; 2474 default: 2475 pr_err("Invalid ALUA state '%c'\n", state); 2476 ret = -EINVAL; 2477 goto out; 2478 } 2479 2480 ret = core_alua_allocate_lba_map_mem(lba_map, 2481 pg_id, alua_state); 2482 if (ret) { 2483 pr_err("Invalid target descriptor %d:%c " 2484 "at line %d\n", 2485 pg_id, state, num); 2486 break; 2487 } 2488 pg++; 2489 ptr = strchr(ptr, ' '); 2490 if (ptr) 2491 ptr++; 2492 else 2493 break; 2494 } 2495 if (pg_num == -1) 2496 pg_num = pg; 2497 else if (pg != pg_num) { 2498 pr_err("Only %d from %d port groups definitions " 2499 "at line %d\n", pg, pg_num, num); 2500 ret = -EINVAL; 2501 break; 2502 } 2503 num++; 2504 } 2505 out: 2506 if (ret) { 2507 core_alua_free_lba_map(&lba_list); 2508 count = ret; 2509 } else 2510 core_alua_set_lba_map(dev, &lba_list, 2511 segment_size, segment_mult); 2512 kfree(orig); 2513 return count; 2514 } 2515 2516 CONFIGFS_ATTR_RO(target_dev_, info); 2517 CONFIGFS_ATTR_WO(target_dev_, control); 2518 CONFIGFS_ATTR(target_dev_, alias); 2519 CONFIGFS_ATTR(target_dev_, udev_path); 2520 CONFIGFS_ATTR(target_dev_, enable); 2521 CONFIGFS_ATTR(target_dev_, alua_lu_gp); 2522 CONFIGFS_ATTR(target_dev_, lba_map); 2523 2524 static struct configfs_attribute *target_core_dev_attrs[] = { 2525 &target_dev_attr_info, 2526 &target_dev_attr_control, 2527 &target_dev_attr_alias, 2528 &target_dev_attr_udev_path, 2529 &target_dev_attr_enable, 2530 &target_dev_attr_alua_lu_gp, 2531 &target_dev_attr_lba_map, 2532 NULL, 2533 }; 2534 2535 static void target_core_dev_release(struct config_item *item) 2536 { 2537 struct config_group *dev_cg = to_config_group(item); 2538 struct se_device *dev = 2539 container_of(dev_cg, struct se_device, dev_group); 2540 2541 target_free_device(dev); 2542 } 2543 2544 /* 2545 * Used in target_core_fabric_configfs.c to verify valid se_device symlink 2546 * within target_fabric_port_link() 2547 */ 2548 struct configfs_item_operations target_core_dev_item_ops = { 2549 .release = target_core_dev_release, 2550 }; 2551 2552 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs); 2553 2554 /* End functions for struct config_item_type tb_dev_cit */ 2555 2556 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 2557 2558 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item) 2559 { 2560 return container_of(to_config_group(item), struct t10_alua_lu_gp, 2561 lu_gp_group); 2562 } 2563 2564 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page) 2565 { 2566 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2567 2568 if (!lu_gp->lu_gp_valid_id) 2569 return 0; 2570 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2571 } 2572 2573 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item, 2574 const char *page, size_t count) 2575 { 2576 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2577 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2578 unsigned long lu_gp_id; 2579 int ret; 2580 2581 ret = kstrtoul(page, 0, &lu_gp_id); 2582 if (ret < 0) { 2583 pr_err("kstrtoul() returned %d for" 2584 " lu_gp_id\n", ret); 2585 return ret; 2586 } 2587 if (lu_gp_id > 0x0000ffff) { 2588 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 2589 " 0x0000ffff\n", lu_gp_id); 2590 return -EINVAL; 2591 } 2592 2593 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2594 if (ret < 0) 2595 return -EINVAL; 2596 2597 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 2598 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2599 config_item_name(&alua_lu_gp_cg->cg_item), 2600 lu_gp->lu_gp_id); 2601 2602 return count; 2603 } 2604 2605 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page) 2606 { 2607 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2608 struct se_device *dev; 2609 struct se_hba *hba; 2610 struct t10_alua_lu_gp_member *lu_gp_mem; 2611 ssize_t len = 0, cur_len; 2612 unsigned char buf[LU_GROUP_NAME_BUF] = { }; 2613 2614 spin_lock(&lu_gp->lu_gp_lock); 2615 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2616 dev = lu_gp_mem->lu_gp_mem_dev; 2617 hba = dev->se_hba; 2618 2619 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 2620 config_item_name(&hba->hba_group.cg_item), 2621 config_item_name(&dev->dev_group.cg_item)); 2622 cur_len++; /* Extra byte for NULL terminator */ 2623 2624 if ((cur_len + len) > PAGE_SIZE) { 2625 pr_warn("Ran out of lu_gp_show_attr" 2626 "_members buffer\n"); 2627 break; 2628 } 2629 memcpy(page+len, buf, cur_len); 2630 len += cur_len; 2631 } 2632 spin_unlock(&lu_gp->lu_gp_lock); 2633 2634 return len; 2635 } 2636 2637 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id); 2638 CONFIGFS_ATTR_RO(target_lu_gp_, members); 2639 2640 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2641 &target_lu_gp_attr_lu_gp_id, 2642 &target_lu_gp_attr_members, 2643 NULL, 2644 }; 2645 2646 static void target_core_alua_lu_gp_release(struct config_item *item) 2647 { 2648 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2649 struct t10_alua_lu_gp, lu_gp_group); 2650 2651 core_alua_free_lu_gp(lu_gp); 2652 } 2653 2654 static struct configfs_item_operations target_core_alua_lu_gp_ops = { 2655 .release = target_core_alua_lu_gp_release, 2656 }; 2657 2658 static const struct config_item_type target_core_alua_lu_gp_cit = { 2659 .ct_item_ops = &target_core_alua_lu_gp_ops, 2660 .ct_attrs = target_core_alua_lu_gp_attrs, 2661 .ct_owner = THIS_MODULE, 2662 }; 2663 2664 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2665 2666 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2667 2668 static struct config_group *target_core_alua_create_lu_gp( 2669 struct config_group *group, 2670 const char *name) 2671 { 2672 struct t10_alua_lu_gp *lu_gp; 2673 struct config_group *alua_lu_gp_cg = NULL; 2674 struct config_item *alua_lu_gp_ci = NULL; 2675 2676 lu_gp = core_alua_allocate_lu_gp(name, 0); 2677 if (IS_ERR(lu_gp)) 2678 return NULL; 2679 2680 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2681 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2682 2683 config_group_init_type_name(alua_lu_gp_cg, name, 2684 &target_core_alua_lu_gp_cit); 2685 2686 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2687 " Group: core/alua/lu_gps/%s\n", 2688 config_item_name(alua_lu_gp_ci)); 2689 2690 return alua_lu_gp_cg; 2691 2692 } 2693 2694 static void target_core_alua_drop_lu_gp( 2695 struct config_group *group, 2696 struct config_item *item) 2697 { 2698 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2699 struct t10_alua_lu_gp, lu_gp_group); 2700 2701 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2702 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2703 config_item_name(item), lu_gp->lu_gp_id); 2704 /* 2705 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 2706 * -> target_core_alua_lu_gp_release() 2707 */ 2708 config_item_put(item); 2709 } 2710 2711 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2712 .make_group = &target_core_alua_create_lu_gp, 2713 .drop_item = &target_core_alua_drop_lu_gp, 2714 }; 2715 2716 static const struct config_item_type target_core_alua_lu_gps_cit = { 2717 .ct_item_ops = NULL, 2718 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2719 .ct_owner = THIS_MODULE, 2720 }; 2721 2722 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2723 2724 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2725 2726 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item) 2727 { 2728 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp, 2729 tg_pt_gp_group); 2730 } 2731 2732 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item, 2733 char *page) 2734 { 2735 return sprintf(page, "%d\n", 2736 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state); 2737 } 2738 2739 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item, 2740 const char *page, size_t count) 2741 { 2742 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2743 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; 2744 unsigned long tmp; 2745 int new_state, ret; 2746 2747 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2748 pr_err("Unable to do implicit ALUA on invalid tg_pt_gp ID\n"); 2749 return -EINVAL; 2750 } 2751 if (!target_dev_configured(dev)) { 2752 pr_err("Unable to set alua_access_state while device is" 2753 " not configured\n"); 2754 return -ENODEV; 2755 } 2756 2757 ret = kstrtoul(page, 0, &tmp); 2758 if (ret < 0) { 2759 pr_err("Unable to extract new ALUA access state from" 2760 " %s\n", page); 2761 return ret; 2762 } 2763 new_state = (int)tmp; 2764 2765 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) { 2766 pr_err("Unable to process implicit configfs ALUA" 2767 " transition while TPGS_IMPLICIT_ALUA is disabled\n"); 2768 return -EINVAL; 2769 } 2770 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA && 2771 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) { 2772 /* LBA DEPENDENT is only allowed with implicit ALUA */ 2773 pr_err("Unable to process implicit configfs ALUA transition" 2774 " while explicit ALUA management is enabled\n"); 2775 return -EINVAL; 2776 } 2777 2778 ret = core_alua_do_port_transition(tg_pt_gp, dev, 2779 NULL, NULL, new_state, 0); 2780 return (!ret) ? count : -EINVAL; 2781 } 2782 2783 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item, 2784 char *page) 2785 { 2786 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2787 return sprintf(page, "%s\n", 2788 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2789 } 2790 2791 static ssize_t target_tg_pt_gp_alua_access_status_store( 2792 struct config_item *item, const char *page, size_t count) 2793 { 2794 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2795 unsigned long tmp; 2796 int new_status, ret; 2797 2798 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2799 pr_err("Unable to set ALUA access status on invalid tg_pt_gp ID\n"); 2800 return -EINVAL; 2801 } 2802 2803 ret = kstrtoul(page, 0, &tmp); 2804 if (ret < 0) { 2805 pr_err("Unable to extract new ALUA access status" 2806 " from %s\n", page); 2807 return ret; 2808 } 2809 new_status = (int)tmp; 2810 2811 if ((new_status != ALUA_STATUS_NONE) && 2812 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && 2813 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { 2814 pr_err("Illegal ALUA access status: 0x%02x\n", 2815 new_status); 2816 return -EINVAL; 2817 } 2818 2819 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2820 return count; 2821 } 2822 2823 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item, 2824 char *page) 2825 { 2826 return core_alua_show_access_type(to_tg_pt_gp(item), page); 2827 } 2828 2829 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item, 2830 const char *page, size_t count) 2831 { 2832 return core_alua_store_access_type(to_tg_pt_gp(item), page, count); 2833 } 2834 2835 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \ 2836 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \ 2837 struct config_item *item, char *p) \ 2838 { \ 2839 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 2840 return sprintf(p, "%d\n", \ 2841 !!(t->tg_pt_gp_alua_supported_states & _bit)); \ 2842 } \ 2843 \ 2844 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \ 2845 struct config_item *item, const char *p, size_t c) \ 2846 { \ 2847 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 2848 unsigned long tmp; \ 2849 int ret; \ 2850 \ 2851 if (!t->tg_pt_gp_valid_id) { \ 2852 pr_err("Unable to set " #_name " ALUA state on invalid tg_pt_gp ID\n"); \ 2853 return -EINVAL; \ 2854 } \ 2855 \ 2856 ret = kstrtoul(p, 0, &tmp); \ 2857 if (ret < 0) { \ 2858 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \ 2859 return -EINVAL; \ 2860 } \ 2861 if (tmp > 1) { \ 2862 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \ 2863 return -EINVAL; \ 2864 } \ 2865 if (tmp) \ 2866 t->tg_pt_gp_alua_supported_states |= _bit; \ 2867 else \ 2868 t->tg_pt_gp_alua_supported_states &= ~_bit; \ 2869 \ 2870 return c; \ 2871 } 2872 2873 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP); 2874 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP); 2875 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP); 2876 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP); 2877 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP); 2878 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP); 2879 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP); 2880 2881 static ssize_t target_tg_pt_gp_alua_write_metadata_show( 2882 struct config_item *item, char *page) 2883 { 2884 return sprintf(page, "%d\n", 2885 to_tg_pt_gp(item)->tg_pt_gp_write_metadata); 2886 } 2887 2888 static ssize_t target_tg_pt_gp_alua_write_metadata_store( 2889 struct config_item *item, const char *page, size_t count) 2890 { 2891 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2892 unsigned long tmp; 2893 int ret; 2894 2895 ret = kstrtoul(page, 0, &tmp); 2896 if (ret < 0) { 2897 pr_err("Unable to extract alua_write_metadata\n"); 2898 return ret; 2899 } 2900 2901 if ((tmp != 0) && (tmp != 1)) { 2902 pr_err("Illegal value for alua_write_metadata:" 2903 " %lu\n", tmp); 2904 return -EINVAL; 2905 } 2906 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 2907 2908 return count; 2909 } 2910 2911 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item, 2912 char *page) 2913 { 2914 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page); 2915 } 2916 2917 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item, 2918 const char *page, size_t count) 2919 { 2920 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page, 2921 count); 2922 } 2923 2924 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item, 2925 char *page) 2926 { 2927 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page); 2928 } 2929 2930 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item, 2931 const char *page, size_t count) 2932 { 2933 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page, 2934 count); 2935 } 2936 2937 static ssize_t target_tg_pt_gp_implicit_trans_secs_show( 2938 struct config_item *item, char *page) 2939 { 2940 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page); 2941 } 2942 2943 static ssize_t target_tg_pt_gp_implicit_trans_secs_store( 2944 struct config_item *item, const char *page, size_t count) 2945 { 2946 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page, 2947 count); 2948 } 2949 2950 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item, 2951 char *page) 2952 { 2953 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page); 2954 } 2955 2956 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item, 2957 const char *page, size_t count) 2958 { 2959 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count); 2960 } 2961 2962 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item, 2963 char *page) 2964 { 2965 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2966 2967 if (!tg_pt_gp->tg_pt_gp_valid_id) 2968 return 0; 2969 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 2970 } 2971 2972 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item, 2973 const char *page, size_t count) 2974 { 2975 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2976 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2977 unsigned long tg_pt_gp_id; 2978 int ret; 2979 2980 ret = kstrtoul(page, 0, &tg_pt_gp_id); 2981 if (ret < 0) { 2982 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n", 2983 page); 2984 return ret; 2985 } 2986 if (tg_pt_gp_id > 0x0000ffff) { 2987 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n", 2988 tg_pt_gp_id); 2989 return -EINVAL; 2990 } 2991 2992 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 2993 if (ret < 0) 2994 return -EINVAL; 2995 2996 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 2997 "core/alua/tg_pt_gps/%s to ID: %hu\n", 2998 config_item_name(&alua_tg_pt_gp_cg->cg_item), 2999 tg_pt_gp->tg_pt_gp_id); 3000 3001 return count; 3002 } 3003 3004 static ssize_t target_tg_pt_gp_members_show(struct config_item *item, 3005 char *page) 3006 { 3007 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3008 struct se_lun *lun; 3009 ssize_t len = 0, cur_len; 3010 unsigned char buf[TG_PT_GROUP_NAME_BUF] = { }; 3011 3012 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 3013 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, 3014 lun_tg_pt_gp_link) { 3015 struct se_portal_group *tpg = lun->lun_tpg; 3016 3017 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 3018 "/%s\n", tpg->se_tpg_tfo->fabric_name, 3019 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 3020 tpg->se_tpg_tfo->tpg_get_tag(tpg), 3021 config_item_name(&lun->lun_group.cg_item)); 3022 cur_len++; /* Extra byte for NULL terminator */ 3023 3024 if ((cur_len + len) > PAGE_SIZE) { 3025 pr_warn("Ran out of lu_gp_show_attr" 3026 "_members buffer\n"); 3027 break; 3028 } 3029 memcpy(page+len, buf, cur_len); 3030 len += cur_len; 3031 } 3032 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 3033 3034 return len; 3035 } 3036 3037 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state); 3038 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status); 3039 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type); 3040 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning); 3041 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline); 3042 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent); 3043 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable); 3044 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby); 3045 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized); 3046 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized); 3047 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata); 3048 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs); 3049 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs); 3050 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs); 3051 CONFIGFS_ATTR(target_tg_pt_gp_, preferred); 3052 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id); 3053 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members); 3054 3055 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 3056 &target_tg_pt_gp_attr_alua_access_state, 3057 &target_tg_pt_gp_attr_alua_access_status, 3058 &target_tg_pt_gp_attr_alua_access_type, 3059 &target_tg_pt_gp_attr_alua_support_transitioning, 3060 &target_tg_pt_gp_attr_alua_support_offline, 3061 &target_tg_pt_gp_attr_alua_support_lba_dependent, 3062 &target_tg_pt_gp_attr_alua_support_unavailable, 3063 &target_tg_pt_gp_attr_alua_support_standby, 3064 &target_tg_pt_gp_attr_alua_support_active_nonoptimized, 3065 &target_tg_pt_gp_attr_alua_support_active_optimized, 3066 &target_tg_pt_gp_attr_alua_write_metadata, 3067 &target_tg_pt_gp_attr_nonop_delay_msecs, 3068 &target_tg_pt_gp_attr_trans_delay_msecs, 3069 &target_tg_pt_gp_attr_implicit_trans_secs, 3070 &target_tg_pt_gp_attr_preferred, 3071 &target_tg_pt_gp_attr_tg_pt_gp_id, 3072 &target_tg_pt_gp_attr_members, 3073 NULL, 3074 }; 3075 3076 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 3077 { 3078 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3079 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3080 3081 core_alua_free_tg_pt_gp(tg_pt_gp); 3082 } 3083 3084 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 3085 .release = target_core_alua_tg_pt_gp_release, 3086 }; 3087 3088 static const struct config_item_type target_core_alua_tg_pt_gp_cit = { 3089 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 3090 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 3091 .ct_owner = THIS_MODULE, 3092 }; 3093 3094 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 3095 3096 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3097 3098 static struct config_group *target_core_alua_create_tg_pt_gp( 3099 struct config_group *group, 3100 const char *name) 3101 { 3102 struct t10_alua *alua = container_of(group, struct t10_alua, 3103 alua_tg_pt_gps_group); 3104 struct t10_alua_tg_pt_gp *tg_pt_gp; 3105 struct config_group *alua_tg_pt_gp_cg = NULL; 3106 struct config_item *alua_tg_pt_gp_ci = NULL; 3107 3108 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0); 3109 if (!tg_pt_gp) 3110 return NULL; 3111 3112 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 3113 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 3114 3115 config_group_init_type_name(alua_tg_pt_gp_cg, name, 3116 &target_core_alua_tg_pt_gp_cit); 3117 3118 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 3119 " Group: alua/tg_pt_gps/%s\n", 3120 config_item_name(alua_tg_pt_gp_ci)); 3121 3122 return alua_tg_pt_gp_cg; 3123 } 3124 3125 static void target_core_alua_drop_tg_pt_gp( 3126 struct config_group *group, 3127 struct config_item *item) 3128 { 3129 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3130 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3131 3132 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 3133 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 3134 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 3135 /* 3136 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 3137 * -> target_core_alua_tg_pt_gp_release(). 3138 */ 3139 config_item_put(item); 3140 } 3141 3142 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 3143 .make_group = &target_core_alua_create_tg_pt_gp, 3144 .drop_item = &target_core_alua_drop_tg_pt_gp, 3145 }; 3146 3147 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL); 3148 3149 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3150 3151 /* Start functions for struct config_item_type target_core_alua_cit */ 3152 3153 /* 3154 * target_core_alua_cit is a ConfigFS group that lives under 3155 * /sys/kernel/config/target/core/alua. There are default groups 3156 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 3157 * target_core_alua_cit in target_core_init_configfs() below. 3158 */ 3159 static const struct config_item_type target_core_alua_cit = { 3160 .ct_item_ops = NULL, 3161 .ct_attrs = NULL, 3162 .ct_owner = THIS_MODULE, 3163 }; 3164 3165 /* End functions for struct config_item_type target_core_alua_cit */ 3166 3167 /* Start functions for struct config_item_type tb_dev_stat_cit */ 3168 3169 static struct config_group *target_core_stat_mkdir( 3170 struct config_group *group, 3171 const char *name) 3172 { 3173 return ERR_PTR(-ENOSYS); 3174 } 3175 3176 static void target_core_stat_rmdir( 3177 struct config_group *group, 3178 struct config_item *item) 3179 { 3180 return; 3181 } 3182 3183 static struct configfs_group_operations target_core_stat_group_ops = { 3184 .make_group = &target_core_stat_mkdir, 3185 .drop_item = &target_core_stat_rmdir, 3186 }; 3187 3188 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL); 3189 3190 /* End functions for struct config_item_type tb_dev_stat_cit */ 3191 3192 /* Start functions for struct config_item_type target_core_hba_cit */ 3193 3194 static struct config_group *target_core_make_subdev( 3195 struct config_group *group, 3196 const char *name) 3197 { 3198 struct t10_alua_tg_pt_gp *tg_pt_gp; 3199 struct config_item *hba_ci = &group->cg_item; 3200 struct se_hba *hba = item_to_hba(hba_ci); 3201 struct target_backend *tb = hba->backend; 3202 struct se_device *dev; 3203 int errno = -ENOMEM, ret; 3204 3205 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 3206 if (ret) 3207 return ERR_PTR(ret); 3208 3209 dev = target_alloc_device(hba, name); 3210 if (!dev) 3211 goto out_unlock; 3212 3213 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit); 3214 3215 config_group_init_type_name(&dev->dev_action_group, "action", 3216 &tb->tb_dev_action_cit); 3217 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group); 3218 3219 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib", 3220 &tb->tb_dev_attrib_cit); 3221 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group); 3222 3223 config_group_init_type_name(&dev->dev_pr_group, "pr", 3224 &tb->tb_dev_pr_cit); 3225 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group); 3226 3227 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn", 3228 &tb->tb_dev_wwn_cit); 3229 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group, 3230 &dev->dev_group); 3231 3232 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group, 3233 "alua", &tb->tb_dev_alua_tg_pt_gps_cit); 3234 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group, 3235 &dev->dev_group); 3236 3237 config_group_init_type_name(&dev->dev_stat_grps.stat_group, 3238 "statistics", &tb->tb_dev_stat_cit); 3239 configfs_add_default_group(&dev->dev_stat_grps.stat_group, 3240 &dev->dev_group); 3241 3242 /* 3243 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 3244 */ 3245 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1); 3246 if (!tg_pt_gp) 3247 goto out_free_device; 3248 dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 3249 3250 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 3251 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 3252 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group, 3253 &dev->t10_alua.alua_tg_pt_gps_group); 3254 3255 /* 3256 * Add core/$HBA/$DEV/statistics/ default groups 3257 */ 3258 target_stat_setup_dev_default_groups(dev); 3259 3260 mutex_unlock(&hba->hba_access_mutex); 3261 return &dev->dev_group; 3262 3263 out_free_device: 3264 target_free_device(dev); 3265 out_unlock: 3266 mutex_unlock(&hba->hba_access_mutex); 3267 return ERR_PTR(errno); 3268 } 3269 3270 static void target_core_drop_subdev( 3271 struct config_group *group, 3272 struct config_item *item) 3273 { 3274 struct config_group *dev_cg = to_config_group(item); 3275 struct se_device *dev = 3276 container_of(dev_cg, struct se_device, dev_group); 3277 struct se_hba *hba; 3278 3279 hba = item_to_hba(&dev->se_hba->hba_group.cg_item); 3280 3281 mutex_lock(&hba->hba_access_mutex); 3282 3283 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group); 3284 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group); 3285 3286 /* 3287 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 3288 * directly from target_core_alua_tg_pt_gp_release(). 3289 */ 3290 dev->t10_alua.default_tg_pt_gp = NULL; 3291 3292 configfs_remove_default_groups(dev_cg); 3293 3294 /* 3295 * se_dev is released from target_core_dev_item_ops->release() 3296 */ 3297 config_item_put(item); 3298 mutex_unlock(&hba->hba_access_mutex); 3299 } 3300 3301 static struct configfs_group_operations target_core_hba_group_ops = { 3302 .make_group = target_core_make_subdev, 3303 .drop_item = target_core_drop_subdev, 3304 }; 3305 3306 3307 static inline struct se_hba *to_hba(struct config_item *item) 3308 { 3309 return container_of(to_config_group(item), struct se_hba, hba_group); 3310 } 3311 3312 static ssize_t target_hba_info_show(struct config_item *item, char *page) 3313 { 3314 struct se_hba *hba = to_hba(item); 3315 3316 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 3317 hba->hba_id, hba->backend->ops->name, 3318 TARGET_CORE_VERSION); 3319 } 3320 3321 static ssize_t target_hba_mode_show(struct config_item *item, char *page) 3322 { 3323 struct se_hba *hba = to_hba(item); 3324 int hba_mode = 0; 3325 3326 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 3327 hba_mode = 1; 3328 3329 return sprintf(page, "%d\n", hba_mode); 3330 } 3331 3332 static ssize_t target_hba_mode_store(struct config_item *item, 3333 const char *page, size_t count) 3334 { 3335 struct se_hba *hba = to_hba(item); 3336 unsigned long mode_flag; 3337 int ret; 3338 3339 if (hba->backend->ops->pmode_enable_hba == NULL) 3340 return -EINVAL; 3341 3342 ret = kstrtoul(page, 0, &mode_flag); 3343 if (ret < 0) { 3344 pr_err("Unable to extract hba mode flag: %d\n", ret); 3345 return ret; 3346 } 3347 3348 if (hba->dev_count) { 3349 pr_err("Unable to set hba_mode with active devices\n"); 3350 return -EINVAL; 3351 } 3352 3353 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag); 3354 if (ret < 0) 3355 return -EINVAL; 3356 if (ret > 0) 3357 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 3358 else if (ret == 0) 3359 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 3360 3361 return count; 3362 } 3363 3364 CONFIGFS_ATTR_RO(target_, hba_info); 3365 CONFIGFS_ATTR(target_, hba_mode); 3366 3367 static void target_core_hba_release(struct config_item *item) 3368 { 3369 struct se_hba *hba = container_of(to_config_group(item), 3370 struct se_hba, hba_group); 3371 core_delete_hba(hba); 3372 } 3373 3374 static struct configfs_attribute *target_core_hba_attrs[] = { 3375 &target_attr_hba_info, 3376 &target_attr_hba_mode, 3377 NULL, 3378 }; 3379 3380 static struct configfs_item_operations target_core_hba_item_ops = { 3381 .release = target_core_hba_release, 3382 }; 3383 3384 static const struct config_item_type target_core_hba_cit = { 3385 .ct_item_ops = &target_core_hba_item_ops, 3386 .ct_group_ops = &target_core_hba_group_ops, 3387 .ct_attrs = target_core_hba_attrs, 3388 .ct_owner = THIS_MODULE, 3389 }; 3390 3391 static struct config_group *target_core_call_addhbatotarget( 3392 struct config_group *group, 3393 const char *name) 3394 { 3395 char *se_plugin_str, *str, *str2; 3396 struct se_hba *hba; 3397 char buf[TARGET_CORE_NAME_MAX_LEN] = { }; 3398 unsigned long plugin_dep_id = 0; 3399 int ret; 3400 3401 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 3402 pr_err("Passed *name strlen(): %d exceeds" 3403 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 3404 TARGET_CORE_NAME_MAX_LEN); 3405 return ERR_PTR(-ENAMETOOLONG); 3406 } 3407 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 3408 3409 str = strstr(buf, "_"); 3410 if (!str) { 3411 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 3412 return ERR_PTR(-EINVAL); 3413 } 3414 se_plugin_str = buf; 3415 /* 3416 * Special case for subsystem plugins that have "_" in their names. 3417 * Namely rd_direct and rd_mcp.. 3418 */ 3419 str2 = strstr(str+1, "_"); 3420 if (str2) { 3421 *str2 = '\0'; /* Terminate for *se_plugin_str */ 3422 str2++; /* Skip to start of plugin dependent ID */ 3423 str = str2; 3424 } else { 3425 *str = '\0'; /* Terminate for *se_plugin_str */ 3426 str++; /* Skip to start of plugin dependent ID */ 3427 } 3428 3429 ret = kstrtoul(str, 0, &plugin_dep_id); 3430 if (ret < 0) { 3431 pr_err("kstrtoul() returned %d for" 3432 " plugin_dep_id\n", ret); 3433 return ERR_PTR(ret); 3434 } 3435 /* 3436 * Load up TCM subsystem plugins if they have not already been loaded. 3437 */ 3438 transport_subsystem_check_init(); 3439 3440 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 3441 if (IS_ERR(hba)) 3442 return ERR_CAST(hba); 3443 3444 config_group_init_type_name(&hba->hba_group, name, 3445 &target_core_hba_cit); 3446 3447 return &hba->hba_group; 3448 } 3449 3450 static void target_core_call_delhbafromtarget( 3451 struct config_group *group, 3452 struct config_item *item) 3453 { 3454 /* 3455 * core_delete_hba() is called from target_core_hba_item_ops->release() 3456 * -> target_core_hba_release() 3457 */ 3458 config_item_put(item); 3459 } 3460 3461 static struct configfs_group_operations target_core_group_ops = { 3462 .make_group = target_core_call_addhbatotarget, 3463 .drop_item = target_core_call_delhbafromtarget, 3464 }; 3465 3466 static const struct config_item_type target_core_cit = { 3467 .ct_item_ops = NULL, 3468 .ct_group_ops = &target_core_group_ops, 3469 .ct_attrs = NULL, 3470 .ct_owner = THIS_MODULE, 3471 }; 3472 3473 /* Stop functions for struct config_item_type target_core_hba_cit */ 3474 3475 void target_setup_backend_cits(struct target_backend *tb) 3476 { 3477 target_core_setup_dev_cit(tb); 3478 target_core_setup_dev_action_cit(tb); 3479 target_core_setup_dev_attrib_cit(tb); 3480 target_core_setup_dev_pr_cit(tb); 3481 target_core_setup_dev_wwn_cit(tb); 3482 target_core_setup_dev_alua_tg_pt_gps_cit(tb); 3483 target_core_setup_dev_stat_cit(tb); 3484 } 3485 3486 static void target_init_dbroot(void) 3487 { 3488 struct file *fp; 3489 3490 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED); 3491 fp = filp_open(db_root_stage, O_RDONLY, 0); 3492 if (IS_ERR(fp)) { 3493 pr_err("db_root: cannot open: %s\n", db_root_stage); 3494 return; 3495 } 3496 if (!S_ISDIR(file_inode(fp)->i_mode)) { 3497 filp_close(fp, NULL); 3498 pr_err("db_root: not a valid directory: %s\n", db_root_stage); 3499 return; 3500 } 3501 filp_close(fp, NULL); 3502 3503 strncpy(db_root, db_root_stage, DB_ROOT_LEN); 3504 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); 3505 } 3506 3507 static int __init target_core_init_configfs(void) 3508 { 3509 struct configfs_subsystem *subsys = &target_core_fabrics; 3510 struct t10_alua_lu_gp *lu_gp; 3511 int ret; 3512 3513 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 3514 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3515 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3516 3517 config_group_init(&subsys->su_group); 3518 mutex_init(&subsys->su_mutex); 3519 3520 ret = init_se_kmem_caches(); 3521 if (ret < 0) 3522 return ret; 3523 /* 3524 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3525 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3526 */ 3527 config_group_init_type_name(&target_core_hbagroup, "core", 3528 &target_core_cit); 3529 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group); 3530 3531 /* 3532 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3533 */ 3534 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit); 3535 configfs_add_default_group(&alua_group, &target_core_hbagroup); 3536 3537 /* 3538 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3539 * groups under /sys/kernel/config/target/core/alua/ 3540 */ 3541 config_group_init_type_name(&alua_lu_gps_group, "lu_gps", 3542 &target_core_alua_lu_gps_cit); 3543 configfs_add_default_group(&alua_lu_gps_group, &alua_group); 3544 3545 /* 3546 * Add core/alua/lu_gps/default_lu_gp 3547 */ 3548 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3549 if (IS_ERR(lu_gp)) { 3550 ret = -ENOMEM; 3551 goto out_global; 3552 } 3553 3554 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3555 &target_core_alua_lu_gp_cit); 3556 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group); 3557 3558 default_lu_gp = lu_gp; 3559 3560 /* 3561 * Register the target_core_mod subsystem with configfs. 3562 */ 3563 ret = configfs_register_subsystem(subsys); 3564 if (ret < 0) { 3565 pr_err("Error %d while registering subsystem %s\n", 3566 ret, subsys->su_group.cg_item.ci_namebuf); 3567 goto out_global; 3568 } 3569 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 3570 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s" 3571 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3572 /* 3573 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3574 */ 3575 ret = rd_module_init(); 3576 if (ret < 0) 3577 goto out; 3578 3579 ret = core_dev_setup_virtual_lun0(); 3580 if (ret < 0) 3581 goto out; 3582 3583 ret = target_xcopy_setup_pt(); 3584 if (ret < 0) 3585 goto out; 3586 3587 target_init_dbroot(); 3588 3589 return 0; 3590 3591 out: 3592 configfs_unregister_subsystem(subsys); 3593 core_dev_release_virtual_lun0(); 3594 rd_module_exit(); 3595 out_global: 3596 if (default_lu_gp) { 3597 core_alua_free_lu_gp(default_lu_gp); 3598 default_lu_gp = NULL; 3599 } 3600 release_se_kmem_caches(); 3601 return ret; 3602 } 3603 3604 static void __exit target_core_exit_configfs(void) 3605 { 3606 configfs_remove_default_groups(&alua_lu_gps_group); 3607 configfs_remove_default_groups(&alua_group); 3608 configfs_remove_default_groups(&target_core_hbagroup); 3609 3610 /* 3611 * We expect subsys->su_group.default_groups to be released 3612 * by configfs subsystem provider logic.. 3613 */ 3614 configfs_unregister_subsystem(&target_core_fabrics); 3615 3616 core_alua_free_lu_gp(default_lu_gp); 3617 default_lu_gp = NULL; 3618 3619 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3620 " Infrastructure\n"); 3621 3622 core_dev_release_virtual_lun0(); 3623 rd_module_exit(); 3624 target_xcopy_release_pt(); 3625 release_se_kmem_caches(); 3626 } 3627 3628 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3629 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3630 MODULE_LICENSE("GPL"); 3631 3632 module_init(target_core_init_configfs); 3633 module_exit(target_core_exit_configfs); 3634