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