1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /******************************************************************************* 3 * Filename: target_core_configfs.c 4 * 5 * This file contains ConfigFS logic for the Generic Target Engine project. 6 * 7 * (c) Copyright 2008-2013 Datera, Inc. 8 * 9 * Nicholas A. Bellinger <nab@kernel.org> 10 * 11 * based on configfs Copyright (C) 2005 Oracle. All rights reserved. 12 * 13 ****************************************************************************/ 14 15 #include <linux/module.h> 16 #include <linux/moduleparam.h> 17 #include <generated/utsrelease.h> 18 #include <linux/utsname.h> 19 #include <linux/init.h> 20 #include <linux/fs.h> 21 #include <linux/namei.h> 22 #include <linux/slab.h> 23 #include <linux/types.h> 24 #include <linux/delay.h> 25 #include <linux/unistd.h> 26 #include <linux/string.h> 27 #include <linux/parser.h> 28 #include <linux/syscalls.h> 29 #include <linux/configfs.h> 30 #include <linux/spinlock.h> 31 32 #include <target/target_core_base.h> 33 #include <target/target_core_backend.h> 34 #include <target/target_core_fabric.h> 35 36 #include "target_core_internal.h" 37 #include "target_core_alua.h" 38 #include "target_core_pr.h" 39 #include "target_core_rd.h" 40 #include "target_core_xcopy.h" 41 42 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \ 43 static void target_core_setup_##_name##_cit(struct target_backend *tb) \ 44 { \ 45 struct config_item_type *cit = &tb->tb_##_name##_cit; \ 46 \ 47 cit->ct_item_ops = _item_ops; \ 48 cit->ct_group_ops = _group_ops; \ 49 cit->ct_attrs = _attrs; \ 50 cit->ct_owner = tb->ops->owner; \ 51 pr_debug("Setup generic %s\n", __stringify(_name)); \ 52 } 53 54 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \ 55 static void target_core_setup_##_name##_cit(struct target_backend *tb) \ 56 { \ 57 struct config_item_type *cit = &tb->tb_##_name##_cit; \ 58 \ 59 cit->ct_item_ops = _item_ops; \ 60 cit->ct_group_ops = _group_ops; \ 61 cit->ct_attrs = tb->ops->tb_##_name##_attrs; \ 62 cit->ct_owner = tb->ops->owner; \ 63 pr_debug("Setup generic %s\n", __stringify(_name)); \ 64 } 65 66 extern struct t10_alua_lu_gp *default_lu_gp; 67 68 static LIST_HEAD(g_tf_list); 69 static DEFINE_MUTEX(g_tf_lock); 70 71 static struct config_group target_core_hbagroup; 72 static struct config_group alua_group; 73 static struct config_group alua_lu_gps_group; 74 75 static inline struct se_hba * 76 item_to_hba(struct config_item *item) 77 { 78 return container_of(to_config_group(item), struct se_hba, hba_group); 79 } 80 81 /* 82 * Attributes for /sys/kernel/config/target/ 83 */ 84 static ssize_t target_core_item_version_show(struct config_item *item, 85 char *page) 86 { 87 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s" 88 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION, 89 utsname()->sysname, utsname()->machine); 90 } 91 92 CONFIGFS_ATTR_RO(target_core_item_, version); 93 94 char db_root[DB_ROOT_LEN] = DB_ROOT_DEFAULT; 95 static char db_root_stage[DB_ROOT_LEN]; 96 97 static ssize_t target_core_item_dbroot_show(struct config_item *item, 98 char *page) 99 { 100 return sprintf(page, "%s\n", db_root); 101 } 102 103 static ssize_t target_core_item_dbroot_store(struct config_item *item, 104 const char *page, size_t count) 105 { 106 ssize_t read_bytes; 107 struct file *fp; 108 109 mutex_lock(&g_tf_lock); 110 if (!list_empty(&g_tf_list)) { 111 mutex_unlock(&g_tf_lock); 112 pr_err("db_root: cannot be changed: target drivers registered"); 113 return -EINVAL; 114 } 115 116 if (count > (DB_ROOT_LEN - 1)) { 117 mutex_unlock(&g_tf_lock); 118 pr_err("db_root: count %d exceeds DB_ROOT_LEN-1: %u\n", 119 (int)count, DB_ROOT_LEN - 1); 120 return -EINVAL; 121 } 122 123 read_bytes = snprintf(db_root_stage, DB_ROOT_LEN, "%s", page); 124 if (!read_bytes) { 125 mutex_unlock(&g_tf_lock); 126 return -EINVAL; 127 } 128 if (db_root_stage[read_bytes - 1] == '\n') 129 db_root_stage[read_bytes - 1] = '\0'; 130 131 /* validate new db root before accepting it */ 132 fp = filp_open(db_root_stage, O_RDONLY, 0); 133 if (IS_ERR(fp)) { 134 mutex_unlock(&g_tf_lock); 135 pr_err("db_root: cannot open: %s\n", db_root_stage); 136 return -EINVAL; 137 } 138 if (!S_ISDIR(file_inode(fp)->i_mode)) { 139 filp_close(fp, NULL); 140 mutex_unlock(&g_tf_lock); 141 pr_err("db_root: not a directory: %s\n", db_root_stage); 142 return -EINVAL; 143 } 144 filp_close(fp, NULL); 145 146 strncpy(db_root, db_root_stage, read_bytes); 147 148 mutex_unlock(&g_tf_lock); 149 150 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); 151 152 return read_bytes; 153 } 154 155 CONFIGFS_ATTR(target_core_item_, dbroot); 156 157 static struct target_fabric_configfs *target_core_get_fabric( 158 const char *name) 159 { 160 struct target_fabric_configfs *tf; 161 162 if (!name) 163 return NULL; 164 165 mutex_lock(&g_tf_lock); 166 list_for_each_entry(tf, &g_tf_list, tf_list) { 167 const char *cmp_name = tf->tf_ops->fabric_alias; 168 if (!cmp_name) 169 cmp_name = tf->tf_ops->fabric_name; 170 if (!strcmp(cmp_name, name)) { 171 atomic_inc(&tf->tf_access_cnt); 172 mutex_unlock(&g_tf_lock); 173 return tf; 174 } 175 } 176 mutex_unlock(&g_tf_lock); 177 178 return NULL; 179 } 180 181 /* 182 * Called from struct target_core_group_ops->make_group() 183 */ 184 static struct config_group *target_core_register_fabric( 185 struct config_group *group, 186 const char *name) 187 { 188 struct target_fabric_configfs *tf; 189 int ret; 190 191 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:" 192 " %s\n", group, name); 193 194 tf = target_core_get_fabric(name); 195 if (!tf) { 196 pr_debug("target_core_register_fabric() trying autoload for %s\n", 197 name); 198 199 /* 200 * Below are some hardcoded request_module() calls to automatically 201 * local fabric modules when the following is called: 202 * 203 * mkdir -p /sys/kernel/config/target/$MODULE_NAME 204 * 205 * Note that this does not limit which TCM fabric module can be 206 * registered, but simply provids auto loading logic for modules with 207 * mkdir(2) system calls with known TCM fabric modules. 208 */ 209 210 if (!strncmp(name, "iscsi", 5)) { 211 /* 212 * Automatically load the LIO Target fabric module when the 213 * following is called: 214 * 215 * mkdir -p $CONFIGFS/target/iscsi 216 */ 217 ret = request_module("iscsi_target_mod"); 218 if (ret < 0) { 219 pr_debug("request_module() failed for" 220 " iscsi_target_mod.ko: %d\n", ret); 221 return ERR_PTR(-EINVAL); 222 } 223 } else if (!strncmp(name, "loopback", 8)) { 224 /* 225 * Automatically load the tcm_loop fabric module when the 226 * following is called: 227 * 228 * mkdir -p $CONFIGFS/target/loopback 229 */ 230 ret = request_module("tcm_loop"); 231 if (ret < 0) { 232 pr_debug("request_module() failed for" 233 " tcm_loop.ko: %d\n", ret); 234 return ERR_PTR(-EINVAL); 235 } 236 } 237 238 tf = target_core_get_fabric(name); 239 } 240 241 if (!tf) { 242 pr_debug("target_core_get_fabric() failed for %s\n", 243 name); 244 return ERR_PTR(-EINVAL); 245 } 246 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:" 247 " %s\n", tf->tf_ops->fabric_name); 248 /* 249 * On a successful target_core_get_fabric() look, the returned 250 * struct target_fabric_configfs *tf will contain a usage reference. 251 */ 252 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n", 253 &tf->tf_wwn_cit); 254 255 config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit); 256 257 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth", 258 &tf->tf_discovery_cit); 259 configfs_add_default_group(&tf->tf_disc_group, &tf->tf_group); 260 261 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric: %s\n", 262 config_item_name(&tf->tf_group.cg_item)); 263 return &tf->tf_group; 264 } 265 266 /* 267 * Called from struct target_core_group_ops->drop_item() 268 */ 269 static void target_core_deregister_fabric( 270 struct config_group *group, 271 struct config_item *item) 272 { 273 struct target_fabric_configfs *tf = container_of( 274 to_config_group(item), struct target_fabric_configfs, tf_group); 275 276 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in" 277 " tf list\n", config_item_name(item)); 278 279 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:" 280 " %s\n", tf->tf_ops->fabric_name); 281 atomic_dec(&tf->tf_access_cnt); 282 283 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci" 284 " %s\n", config_item_name(item)); 285 286 configfs_remove_default_groups(&tf->tf_group); 287 config_item_put(item); 288 } 289 290 static struct configfs_group_operations target_core_fabric_group_ops = { 291 .make_group = &target_core_register_fabric, 292 .drop_item = &target_core_deregister_fabric, 293 }; 294 295 /* 296 * All item attributes appearing in /sys/kernel/target/ appear here. 297 */ 298 static struct configfs_attribute *target_core_fabric_item_attrs[] = { 299 &target_core_item_attr_version, 300 &target_core_item_attr_dbroot, 301 NULL, 302 }; 303 304 /* 305 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/ 306 */ 307 static const struct config_item_type target_core_fabrics_item = { 308 .ct_group_ops = &target_core_fabric_group_ops, 309 .ct_attrs = target_core_fabric_item_attrs, 310 .ct_owner = THIS_MODULE, 311 }; 312 313 static struct configfs_subsystem target_core_fabrics = { 314 .su_group = { 315 .cg_item = { 316 .ci_namebuf = "target", 317 .ci_type = &target_core_fabrics_item, 318 }, 319 }, 320 }; 321 322 int target_depend_item(struct config_item *item) 323 { 324 return configfs_depend_item(&target_core_fabrics, item); 325 } 326 EXPORT_SYMBOL(target_depend_item); 327 328 void target_undepend_item(struct config_item *item) 329 { 330 return configfs_undepend_item(item); 331 } 332 EXPORT_SYMBOL(target_undepend_item); 333 334 /*############################################################################## 335 // Start functions called by external Target Fabrics Modules 336 //############################################################################*/ 337 338 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo) 339 { 340 if (tfo->fabric_alias) { 341 if (strlen(tfo->fabric_alias) >= TARGET_FABRIC_NAME_SIZE) { 342 pr_err("Passed alias: %s exceeds " 343 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_alias); 344 return -EINVAL; 345 } 346 } 347 if (!tfo->fabric_name) { 348 pr_err("Missing tfo->fabric_name\n"); 349 return -EINVAL; 350 } 351 if (strlen(tfo->fabric_name) >= TARGET_FABRIC_NAME_SIZE) { 352 pr_err("Passed name: %s exceeds " 353 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_name); 354 return -EINVAL; 355 } 356 if (!tfo->tpg_get_wwn) { 357 pr_err("Missing tfo->tpg_get_wwn()\n"); 358 return -EINVAL; 359 } 360 if (!tfo->tpg_get_tag) { 361 pr_err("Missing tfo->tpg_get_tag()\n"); 362 return -EINVAL; 363 } 364 if (!tfo->tpg_check_demo_mode) { 365 pr_err("Missing tfo->tpg_check_demo_mode()\n"); 366 return -EINVAL; 367 } 368 if (!tfo->tpg_check_demo_mode_cache) { 369 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n"); 370 return -EINVAL; 371 } 372 if (!tfo->tpg_check_demo_mode_write_protect) { 373 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n"); 374 return -EINVAL; 375 } 376 if (!tfo->tpg_check_prod_mode_write_protect) { 377 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n"); 378 return -EINVAL; 379 } 380 if (!tfo->tpg_get_inst_index) { 381 pr_err("Missing tfo->tpg_get_inst_index()\n"); 382 return -EINVAL; 383 } 384 if (!tfo->release_cmd) { 385 pr_err("Missing tfo->release_cmd()\n"); 386 return -EINVAL; 387 } 388 if (!tfo->sess_get_index) { 389 pr_err("Missing tfo->sess_get_index()\n"); 390 return -EINVAL; 391 } 392 if (!tfo->write_pending) { 393 pr_err("Missing tfo->write_pending()\n"); 394 return -EINVAL; 395 } 396 if (!tfo->set_default_node_attributes) { 397 pr_err("Missing tfo->set_default_node_attributes()\n"); 398 return -EINVAL; 399 } 400 if (!tfo->get_cmd_state) { 401 pr_err("Missing tfo->get_cmd_state()\n"); 402 return -EINVAL; 403 } 404 if (!tfo->queue_data_in) { 405 pr_err("Missing tfo->queue_data_in()\n"); 406 return -EINVAL; 407 } 408 if (!tfo->queue_status) { 409 pr_err("Missing tfo->queue_status()\n"); 410 return -EINVAL; 411 } 412 if (!tfo->queue_tm_rsp) { 413 pr_err("Missing tfo->queue_tm_rsp()\n"); 414 return -EINVAL; 415 } 416 if (!tfo->aborted_task) { 417 pr_err("Missing tfo->aborted_task()\n"); 418 return -EINVAL; 419 } 420 if (!tfo->check_stop_free) { 421 pr_err("Missing tfo->check_stop_free()\n"); 422 return -EINVAL; 423 } 424 /* 425 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn() 426 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in 427 * target_core_fabric_configfs.c WWN+TPG group context code. 428 */ 429 if (!tfo->fabric_make_wwn) { 430 pr_err("Missing tfo->fabric_make_wwn()\n"); 431 return -EINVAL; 432 } 433 if (!tfo->fabric_drop_wwn) { 434 pr_err("Missing tfo->fabric_drop_wwn()\n"); 435 return -EINVAL; 436 } 437 if (!tfo->fabric_make_tpg) { 438 pr_err("Missing tfo->fabric_make_tpg()\n"); 439 return -EINVAL; 440 } 441 if (!tfo->fabric_drop_tpg) { 442 pr_err("Missing tfo->fabric_drop_tpg()\n"); 443 return -EINVAL; 444 } 445 446 return 0; 447 } 448 449 int target_register_template(const struct target_core_fabric_ops *fo) 450 { 451 struct target_fabric_configfs *tf; 452 int ret; 453 454 ret = target_fabric_tf_ops_check(fo); 455 if (ret) 456 return ret; 457 458 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL); 459 if (!tf) { 460 pr_err("%s: could not allocate memory!\n", __func__); 461 return -ENOMEM; 462 } 463 464 INIT_LIST_HEAD(&tf->tf_list); 465 atomic_set(&tf->tf_access_cnt, 0); 466 tf->tf_ops = fo; 467 target_fabric_setup_cits(tf); 468 469 mutex_lock(&g_tf_lock); 470 list_add_tail(&tf->tf_list, &g_tf_list); 471 mutex_unlock(&g_tf_lock); 472 473 return 0; 474 } 475 EXPORT_SYMBOL(target_register_template); 476 477 void target_unregister_template(const struct target_core_fabric_ops *fo) 478 { 479 struct target_fabric_configfs *t; 480 481 mutex_lock(&g_tf_lock); 482 list_for_each_entry(t, &g_tf_list, tf_list) { 483 if (!strcmp(t->tf_ops->fabric_name, fo->fabric_name)) { 484 BUG_ON(atomic_read(&t->tf_access_cnt)); 485 list_del(&t->tf_list); 486 mutex_unlock(&g_tf_lock); 487 /* 488 * Wait for any outstanding fabric se_deve_entry->rcu_head 489 * callbacks to complete post kfree_rcu(), before allowing 490 * fabric driver unload of TFO->module to proceed. 491 */ 492 rcu_barrier(); 493 kfree(t); 494 return; 495 } 496 } 497 mutex_unlock(&g_tf_lock); 498 } 499 EXPORT_SYMBOL(target_unregister_template); 500 501 /*############################################################################## 502 // Stop functions called by external Target Fabrics Modules 503 //############################################################################*/ 504 505 static inline struct se_dev_attrib *to_attrib(struct config_item *item) 506 { 507 return container_of(to_config_group(item), struct se_dev_attrib, 508 da_group); 509 } 510 511 /* Start functions for struct config_item_type tb_dev_attrib_cit */ 512 #define DEF_CONFIGFS_ATTRIB_SHOW(_name) \ 513 static ssize_t _name##_show(struct config_item *item, char *page) \ 514 { \ 515 return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \ 516 } 517 518 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias); 519 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo); 520 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write); 521 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read); 522 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache); 523 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl); 524 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas); 525 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu); 526 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws); 527 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw); 528 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc); 529 DEF_CONFIGFS_ATTRIB_SHOW(emulate_pr); 530 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type); 531 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type); 532 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify); 533 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids); 534 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot); 535 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord); 536 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl); 537 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size); 538 DEF_CONFIGFS_ATTRIB_SHOW(block_size); 539 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors); 540 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors); 541 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth); 542 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth); 543 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count); 544 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count); 545 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity); 546 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment); 547 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data); 548 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len); 549 550 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \ 551 static ssize_t _name##_store(struct config_item *item, const char *page,\ 552 size_t count) \ 553 { \ 554 struct se_dev_attrib *da = to_attrib(item); \ 555 u32 val; \ 556 int ret; \ 557 \ 558 ret = kstrtou32(page, 0, &val); \ 559 if (ret < 0) \ 560 return ret; \ 561 da->_name = val; \ 562 return count; \ 563 } 564 565 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count); 566 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count); 567 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity); 568 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment); 569 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len); 570 571 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \ 572 static ssize_t _name##_store(struct config_item *item, const char *page, \ 573 size_t count) \ 574 { \ 575 struct se_dev_attrib *da = to_attrib(item); \ 576 bool flag; \ 577 int ret; \ 578 \ 579 ret = strtobool(page, &flag); \ 580 if (ret < 0) \ 581 return ret; \ 582 da->_name = flag; \ 583 return count; \ 584 } 585 586 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write); 587 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw); 588 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc); 589 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr); 590 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids); 591 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot); 592 593 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \ 594 static ssize_t _name##_store(struct config_item *item, const char *page,\ 595 size_t count) \ 596 { \ 597 printk_once(KERN_WARNING \ 598 "ignoring deprecated %s attribute\n", \ 599 __stringify(_name)); \ 600 return count; \ 601 } 602 603 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo); 604 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read); 605 606 static void dev_set_t10_wwn_model_alias(struct se_device *dev) 607 { 608 const char *configname; 609 610 configname = config_item_name(&dev->dev_group.cg_item); 611 if (strlen(configname) >= INQUIRY_MODEL_LEN) { 612 pr_warn("dev[%p]: Backstore name '%s' is too long for " 613 "INQUIRY_MODEL, truncating to 15 characters\n", dev, 614 configname); 615 } 616 /* 617 * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1) 618 * here without potentially breaking existing setups, so continue to 619 * truncate one byte shorter than what can be carried in INQUIRY. 620 */ 621 strlcpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN); 622 } 623 624 static ssize_t emulate_model_alias_store(struct config_item *item, 625 const char *page, size_t count) 626 { 627 struct se_dev_attrib *da = to_attrib(item); 628 struct se_device *dev = da->da_dev; 629 bool flag; 630 int ret; 631 632 if (dev->export_count) { 633 pr_err("dev[%p]: Unable to change model alias" 634 " while export_count is %d\n", 635 dev, dev->export_count); 636 return -EINVAL; 637 } 638 639 ret = strtobool(page, &flag); 640 if (ret < 0) 641 return ret; 642 643 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); 644 if (flag) { 645 dev_set_t10_wwn_model_alias(dev); 646 } else { 647 strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod, 648 sizeof(dev->t10_wwn.model)); 649 } 650 da->emulate_model_alias = flag; 651 return count; 652 } 653 654 static ssize_t emulate_write_cache_store(struct config_item *item, 655 const char *page, size_t count) 656 { 657 struct se_dev_attrib *da = to_attrib(item); 658 bool flag; 659 int ret; 660 661 ret = strtobool(page, &flag); 662 if (ret < 0) 663 return ret; 664 665 if (flag && da->da_dev->transport->get_write_cache) { 666 pr_err("emulate_write_cache not supported for this device\n"); 667 return -EINVAL; 668 } 669 670 da->emulate_write_cache = flag; 671 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 672 da->da_dev, flag); 673 return count; 674 } 675 676 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item, 677 const char *page, size_t count) 678 { 679 struct se_dev_attrib *da = to_attrib(item); 680 u32 val; 681 int ret; 682 683 ret = kstrtou32(page, 0, &val); 684 if (ret < 0) 685 return ret; 686 687 if (val != TARGET_UA_INTLCK_CTRL_CLEAR 688 && val != TARGET_UA_INTLCK_CTRL_NO_CLEAR 689 && val != TARGET_UA_INTLCK_CTRL_ESTABLISH_UA) { 690 pr_err("Illegal value %d\n", val); 691 return -EINVAL; 692 } 693 694 if (da->da_dev->export_count) { 695 pr_err("dev[%p]: Unable to change SE Device" 696 " UA_INTRLCK_CTRL while export_count is %d\n", 697 da->da_dev, da->da_dev->export_count); 698 return -EINVAL; 699 } 700 da->emulate_ua_intlck_ctrl = val; 701 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 702 da->da_dev, val); 703 return count; 704 } 705 706 static ssize_t emulate_tas_store(struct config_item *item, 707 const char *page, size_t count) 708 { 709 struct se_dev_attrib *da = to_attrib(item); 710 bool flag; 711 int ret; 712 713 ret = strtobool(page, &flag); 714 if (ret < 0) 715 return ret; 716 717 if (da->da_dev->export_count) { 718 pr_err("dev[%p]: Unable to change SE Device TAS while" 719 " export_count is %d\n", 720 da->da_dev, da->da_dev->export_count); 721 return -EINVAL; 722 } 723 da->emulate_tas = flag; 724 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 725 da->da_dev, flag ? "Enabled" : "Disabled"); 726 727 return count; 728 } 729 730 static ssize_t emulate_tpu_store(struct config_item *item, 731 const char *page, size_t count) 732 { 733 struct se_dev_attrib *da = to_attrib(item); 734 bool flag; 735 int ret; 736 737 ret = strtobool(page, &flag); 738 if (ret < 0) 739 return ret; 740 741 /* 742 * We expect this value to be non-zero when generic Block Layer 743 * Discard supported is detected iblock_create_virtdevice(). 744 */ 745 if (flag && !da->max_unmap_block_desc_count) { 746 pr_err("Generic Block Discard not supported\n"); 747 return -ENOSYS; 748 } 749 750 da->emulate_tpu = flag; 751 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 752 da->da_dev, flag); 753 return count; 754 } 755 756 static ssize_t emulate_tpws_store(struct config_item *item, 757 const char *page, size_t count) 758 { 759 struct se_dev_attrib *da = to_attrib(item); 760 bool flag; 761 int ret; 762 763 ret = strtobool(page, &flag); 764 if (ret < 0) 765 return ret; 766 767 /* 768 * We expect this value to be non-zero when generic Block Layer 769 * Discard supported is detected iblock_create_virtdevice(). 770 */ 771 if (flag && !da->max_unmap_block_desc_count) { 772 pr_err("Generic Block Discard not supported\n"); 773 return -ENOSYS; 774 } 775 776 da->emulate_tpws = flag; 777 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 778 da->da_dev, flag); 779 return count; 780 } 781 782 static ssize_t pi_prot_type_store(struct config_item *item, 783 const char *page, size_t count) 784 { 785 struct se_dev_attrib *da = to_attrib(item); 786 int old_prot = da->pi_prot_type, ret; 787 struct se_device *dev = da->da_dev; 788 u32 flag; 789 790 ret = kstrtou32(page, 0, &flag); 791 if (ret < 0) 792 return ret; 793 794 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) { 795 pr_err("Illegal value %d for pi_prot_type\n", flag); 796 return -EINVAL; 797 } 798 if (flag == 2) { 799 pr_err("DIF TYPE2 protection currently not supported\n"); 800 return -ENOSYS; 801 } 802 if (da->hw_pi_prot_type) { 803 pr_warn("DIF protection enabled on underlying hardware," 804 " ignoring\n"); 805 return count; 806 } 807 if (!dev->transport->init_prot || !dev->transport->free_prot) { 808 /* 0 is only allowed value for non-supporting backends */ 809 if (flag == 0) 810 return count; 811 812 pr_err("DIF protection not supported by backend: %s\n", 813 dev->transport->name); 814 return -ENOSYS; 815 } 816 if (!target_dev_configured(dev)) { 817 pr_err("DIF protection requires device to be configured\n"); 818 return -ENODEV; 819 } 820 if (dev->export_count) { 821 pr_err("dev[%p]: Unable to change SE Device PROT type while" 822 " export_count is %d\n", dev, dev->export_count); 823 return -EINVAL; 824 } 825 826 da->pi_prot_type = flag; 827 828 if (flag && !old_prot) { 829 ret = dev->transport->init_prot(dev); 830 if (ret) { 831 da->pi_prot_type = old_prot; 832 da->pi_prot_verify = (bool) da->pi_prot_type; 833 return ret; 834 } 835 836 } else if (!flag && old_prot) { 837 dev->transport->free_prot(dev); 838 } 839 840 da->pi_prot_verify = (bool) da->pi_prot_type; 841 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag); 842 return count; 843 } 844 845 /* always zero, but attr needs to remain RW to avoid userspace breakage */ 846 static ssize_t pi_prot_format_show(struct config_item *item, char *page) 847 { 848 return snprintf(page, PAGE_SIZE, "0\n"); 849 } 850 851 static ssize_t pi_prot_format_store(struct config_item *item, 852 const char *page, size_t count) 853 { 854 struct se_dev_attrib *da = to_attrib(item); 855 struct se_device *dev = da->da_dev; 856 bool flag; 857 int ret; 858 859 ret = strtobool(page, &flag); 860 if (ret < 0) 861 return ret; 862 863 if (!flag) 864 return count; 865 866 if (!dev->transport->format_prot) { 867 pr_err("DIF protection format not supported by backend %s\n", 868 dev->transport->name); 869 return -ENOSYS; 870 } 871 if (!target_dev_configured(dev)) { 872 pr_err("DIF protection format requires device to be configured\n"); 873 return -ENODEV; 874 } 875 if (dev->export_count) { 876 pr_err("dev[%p]: Unable to format SE Device PROT type while" 877 " export_count is %d\n", dev, dev->export_count); 878 return -EINVAL; 879 } 880 881 ret = dev->transport->format_prot(dev); 882 if (ret) 883 return ret; 884 885 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev); 886 return count; 887 } 888 889 static ssize_t pi_prot_verify_store(struct config_item *item, 890 const char *page, size_t count) 891 { 892 struct se_dev_attrib *da = to_attrib(item); 893 bool flag; 894 int ret; 895 896 ret = strtobool(page, &flag); 897 if (ret < 0) 898 return ret; 899 900 if (!flag) { 901 da->pi_prot_verify = flag; 902 return count; 903 } 904 if (da->hw_pi_prot_type) { 905 pr_warn("DIF protection enabled on underlying hardware," 906 " ignoring\n"); 907 return count; 908 } 909 if (!da->pi_prot_type) { 910 pr_warn("DIF protection not supported by backend, ignoring\n"); 911 return count; 912 } 913 da->pi_prot_verify = flag; 914 915 return count; 916 } 917 918 static ssize_t force_pr_aptpl_store(struct config_item *item, 919 const char *page, size_t count) 920 { 921 struct se_dev_attrib *da = to_attrib(item); 922 bool flag; 923 int ret; 924 925 ret = strtobool(page, &flag); 926 if (ret < 0) 927 return ret; 928 if (da->da_dev->export_count) { 929 pr_err("dev[%p]: Unable to set force_pr_aptpl while" 930 " export_count is %d\n", 931 da->da_dev, da->da_dev->export_count); 932 return -EINVAL; 933 } 934 935 da->force_pr_aptpl = flag; 936 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag); 937 return count; 938 } 939 940 static ssize_t emulate_rest_reord_store(struct config_item *item, 941 const char *page, size_t count) 942 { 943 struct se_dev_attrib *da = to_attrib(item); 944 bool flag; 945 int ret; 946 947 ret = strtobool(page, &flag); 948 if (ret < 0) 949 return ret; 950 951 if (flag != 0) { 952 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted" 953 " reordering not implemented\n", da->da_dev); 954 return -ENOSYS; 955 } 956 da->emulate_rest_reord = flag; 957 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", 958 da->da_dev, flag); 959 return count; 960 } 961 962 static ssize_t unmap_zeroes_data_store(struct config_item *item, 963 const char *page, size_t count) 964 { 965 struct se_dev_attrib *da = to_attrib(item); 966 bool flag; 967 int ret; 968 969 ret = strtobool(page, &flag); 970 if (ret < 0) 971 return ret; 972 973 if (da->da_dev->export_count) { 974 pr_err("dev[%p]: Unable to change SE Device" 975 " unmap_zeroes_data while export_count is %d\n", 976 da->da_dev, da->da_dev->export_count); 977 return -EINVAL; 978 } 979 /* 980 * We expect this value to be non-zero when generic Block Layer 981 * Discard supported is detected iblock_configure_device(). 982 */ 983 if (flag && !da->max_unmap_block_desc_count) { 984 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set" 985 " because max_unmap_block_desc_count is zero\n", 986 da->da_dev); 987 return -ENOSYS; 988 } 989 da->unmap_zeroes_data = flag; 990 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n", 991 da->da_dev, flag); 992 return count; 993 } 994 995 /* 996 * Note, this can only be called on unexported SE Device Object. 997 */ 998 static ssize_t queue_depth_store(struct config_item *item, 999 const char *page, size_t count) 1000 { 1001 struct se_dev_attrib *da = to_attrib(item); 1002 struct se_device *dev = da->da_dev; 1003 u32 val; 1004 int ret; 1005 1006 ret = kstrtou32(page, 0, &val); 1007 if (ret < 0) 1008 return ret; 1009 1010 if (dev->export_count) { 1011 pr_err("dev[%p]: Unable to change SE Device TCQ while" 1012 " export_count is %d\n", 1013 dev, dev->export_count); 1014 return -EINVAL; 1015 } 1016 if (!val) { 1017 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev); 1018 return -EINVAL; 1019 } 1020 1021 if (val > dev->dev_attrib.queue_depth) { 1022 if (val > dev->dev_attrib.hw_queue_depth) { 1023 pr_err("dev[%p]: Passed queue_depth:" 1024 " %u exceeds TCM/SE_Device MAX" 1025 " TCQ: %u\n", dev, val, 1026 dev->dev_attrib.hw_queue_depth); 1027 return -EINVAL; 1028 } 1029 } 1030 da->queue_depth = dev->queue_depth = val; 1031 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val); 1032 return count; 1033 } 1034 1035 static ssize_t optimal_sectors_store(struct config_item *item, 1036 const char *page, size_t count) 1037 { 1038 struct se_dev_attrib *da = to_attrib(item); 1039 u32 val; 1040 int ret; 1041 1042 ret = kstrtou32(page, 0, &val); 1043 if (ret < 0) 1044 return ret; 1045 1046 if (da->da_dev->export_count) { 1047 pr_err("dev[%p]: Unable to change SE Device" 1048 " optimal_sectors while export_count is %d\n", 1049 da->da_dev, da->da_dev->export_count); 1050 return -EINVAL; 1051 } 1052 if (val > da->hw_max_sectors) { 1053 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1054 " greater than hw_max_sectors: %u\n", 1055 da->da_dev, val, da->hw_max_sectors); 1056 return -EINVAL; 1057 } 1058 1059 da->optimal_sectors = val; 1060 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1061 da->da_dev, val); 1062 return count; 1063 } 1064 1065 static ssize_t block_size_store(struct config_item *item, 1066 const char *page, size_t count) 1067 { 1068 struct se_dev_attrib *da = to_attrib(item); 1069 u32 val; 1070 int ret; 1071 1072 ret = kstrtou32(page, 0, &val); 1073 if (ret < 0) 1074 return ret; 1075 1076 if (da->da_dev->export_count) { 1077 pr_err("dev[%p]: Unable to change SE Device block_size" 1078 " while export_count is %d\n", 1079 da->da_dev, da->da_dev->export_count); 1080 return -EINVAL; 1081 } 1082 1083 if (val != 512 && val != 1024 && val != 2048 && val != 4096) { 1084 pr_err("dev[%p]: Illegal value for block_device: %u" 1085 " for SE device, must be 512, 1024, 2048 or 4096\n", 1086 da->da_dev, val); 1087 return -EINVAL; 1088 } 1089 1090 da->block_size = val; 1091 if (da->max_bytes_per_io) 1092 da->hw_max_sectors = da->max_bytes_per_io / val; 1093 1094 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1095 da->da_dev, val); 1096 return count; 1097 } 1098 1099 static ssize_t alua_support_show(struct config_item *item, char *page) 1100 { 1101 struct se_dev_attrib *da = to_attrib(item); 1102 u8 flags = da->da_dev->transport_flags; 1103 1104 return snprintf(page, PAGE_SIZE, "%d\n", 1105 flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1); 1106 } 1107 1108 static ssize_t alua_support_store(struct config_item *item, 1109 const char *page, size_t count) 1110 { 1111 struct se_dev_attrib *da = to_attrib(item); 1112 struct se_device *dev = da->da_dev; 1113 bool flag; 1114 int ret; 1115 1116 if (!(dev->transport->transport_flags_changeable & 1117 TRANSPORT_FLAG_PASSTHROUGH_ALUA)) { 1118 pr_err("dev[%p]: Unable to change SE Device alua_support:" 1119 " alua_support has fixed value\n", dev); 1120 return -EINVAL; 1121 } 1122 1123 ret = strtobool(page, &flag); 1124 if (ret < 0) 1125 return ret; 1126 1127 if (flag) 1128 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_ALUA; 1129 else 1130 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_ALUA; 1131 return count; 1132 } 1133 1134 static ssize_t pgr_support_show(struct config_item *item, char *page) 1135 { 1136 struct se_dev_attrib *da = to_attrib(item); 1137 u8 flags = da->da_dev->transport_flags; 1138 1139 return snprintf(page, PAGE_SIZE, "%d\n", 1140 flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1); 1141 } 1142 1143 static ssize_t pgr_support_store(struct config_item *item, 1144 const char *page, size_t count) 1145 { 1146 struct se_dev_attrib *da = to_attrib(item); 1147 struct se_device *dev = da->da_dev; 1148 bool flag; 1149 int ret; 1150 1151 if (!(dev->transport->transport_flags_changeable & 1152 TRANSPORT_FLAG_PASSTHROUGH_PGR)) { 1153 pr_err("dev[%p]: Unable to change SE Device pgr_support:" 1154 " pgr_support has fixed value\n", dev); 1155 return -EINVAL; 1156 } 1157 1158 ret = strtobool(page, &flag); 1159 if (ret < 0) 1160 return ret; 1161 1162 if (flag) 1163 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_PGR; 1164 else 1165 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_PGR; 1166 return count; 1167 } 1168 1169 CONFIGFS_ATTR(, emulate_model_alias); 1170 CONFIGFS_ATTR(, emulate_dpo); 1171 CONFIGFS_ATTR(, emulate_fua_write); 1172 CONFIGFS_ATTR(, emulate_fua_read); 1173 CONFIGFS_ATTR(, emulate_write_cache); 1174 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl); 1175 CONFIGFS_ATTR(, emulate_tas); 1176 CONFIGFS_ATTR(, emulate_tpu); 1177 CONFIGFS_ATTR(, emulate_tpws); 1178 CONFIGFS_ATTR(, emulate_caw); 1179 CONFIGFS_ATTR(, emulate_3pc); 1180 CONFIGFS_ATTR(, emulate_pr); 1181 CONFIGFS_ATTR(, pi_prot_type); 1182 CONFIGFS_ATTR_RO(, hw_pi_prot_type); 1183 CONFIGFS_ATTR(, pi_prot_format); 1184 CONFIGFS_ATTR(, pi_prot_verify); 1185 CONFIGFS_ATTR(, enforce_pr_isids); 1186 CONFIGFS_ATTR(, is_nonrot); 1187 CONFIGFS_ATTR(, emulate_rest_reord); 1188 CONFIGFS_ATTR(, force_pr_aptpl); 1189 CONFIGFS_ATTR_RO(, hw_block_size); 1190 CONFIGFS_ATTR(, block_size); 1191 CONFIGFS_ATTR_RO(, hw_max_sectors); 1192 CONFIGFS_ATTR(, optimal_sectors); 1193 CONFIGFS_ATTR_RO(, hw_queue_depth); 1194 CONFIGFS_ATTR(, queue_depth); 1195 CONFIGFS_ATTR(, max_unmap_lba_count); 1196 CONFIGFS_ATTR(, max_unmap_block_desc_count); 1197 CONFIGFS_ATTR(, unmap_granularity); 1198 CONFIGFS_ATTR(, unmap_granularity_alignment); 1199 CONFIGFS_ATTR(, unmap_zeroes_data); 1200 CONFIGFS_ATTR(, max_write_same_len); 1201 CONFIGFS_ATTR(, alua_support); 1202 CONFIGFS_ATTR(, pgr_support); 1203 1204 /* 1205 * dev_attrib attributes for devices using the target core SBC/SPC 1206 * interpreter. Any backend using spc_parse_cdb should be using 1207 * these. 1208 */ 1209 struct configfs_attribute *sbc_attrib_attrs[] = { 1210 &attr_emulate_model_alias, 1211 &attr_emulate_dpo, 1212 &attr_emulate_fua_write, 1213 &attr_emulate_fua_read, 1214 &attr_emulate_write_cache, 1215 &attr_emulate_ua_intlck_ctrl, 1216 &attr_emulate_tas, 1217 &attr_emulate_tpu, 1218 &attr_emulate_tpws, 1219 &attr_emulate_caw, 1220 &attr_emulate_3pc, 1221 &attr_emulate_pr, 1222 &attr_pi_prot_type, 1223 &attr_hw_pi_prot_type, 1224 &attr_pi_prot_format, 1225 &attr_pi_prot_verify, 1226 &attr_enforce_pr_isids, 1227 &attr_is_nonrot, 1228 &attr_emulate_rest_reord, 1229 &attr_force_pr_aptpl, 1230 &attr_hw_block_size, 1231 &attr_block_size, 1232 &attr_hw_max_sectors, 1233 &attr_optimal_sectors, 1234 &attr_hw_queue_depth, 1235 &attr_queue_depth, 1236 &attr_max_unmap_lba_count, 1237 &attr_max_unmap_block_desc_count, 1238 &attr_unmap_granularity, 1239 &attr_unmap_granularity_alignment, 1240 &attr_unmap_zeroes_data, 1241 &attr_max_write_same_len, 1242 &attr_alua_support, 1243 &attr_pgr_support, 1244 NULL, 1245 }; 1246 EXPORT_SYMBOL(sbc_attrib_attrs); 1247 1248 /* 1249 * Minimal dev_attrib attributes for devices passing through CDBs. 1250 * In this case we only provide a few read-only attributes for 1251 * backwards compatibility. 1252 */ 1253 struct configfs_attribute *passthrough_attrib_attrs[] = { 1254 &attr_hw_pi_prot_type, 1255 &attr_hw_block_size, 1256 &attr_hw_max_sectors, 1257 &attr_hw_queue_depth, 1258 &attr_emulate_pr, 1259 &attr_alua_support, 1260 &attr_pgr_support, 1261 NULL, 1262 }; 1263 EXPORT_SYMBOL(passthrough_attrib_attrs); 1264 1265 /* 1266 * pr related dev_attrib attributes for devices passing through CDBs, 1267 * but allowing in core pr emulation. 1268 */ 1269 struct configfs_attribute *passthrough_pr_attrib_attrs[] = { 1270 &attr_enforce_pr_isids, 1271 &attr_force_pr_aptpl, 1272 NULL, 1273 }; 1274 EXPORT_SYMBOL(passthrough_pr_attrib_attrs); 1275 1276 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL); 1277 TB_CIT_SETUP_DRV(dev_action, NULL, NULL); 1278 1279 /* End functions for struct config_item_type tb_dev_attrib_cit */ 1280 1281 /* Start functions for struct config_item_type tb_dev_wwn_cit */ 1282 1283 static struct t10_wwn *to_t10_wwn(struct config_item *item) 1284 { 1285 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group); 1286 } 1287 1288 static ssize_t target_check_inquiry_data(char *buf) 1289 { 1290 size_t len; 1291 int i; 1292 1293 len = strlen(buf); 1294 1295 /* 1296 * SPC 4.3.1: 1297 * ASCII data fields shall contain only ASCII printable characters 1298 * (i.e., code values 20h to 7Eh) and may be terminated with one or 1299 * more ASCII null (00h) characters. 1300 */ 1301 for (i = 0; i < len; i++) { 1302 if (buf[i] < 0x20 || buf[i] > 0x7E) { 1303 pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n"); 1304 return -EINVAL; 1305 } 1306 } 1307 1308 return len; 1309 } 1310 1311 /* 1312 * STANDARD and VPD page 0x83 T10 Vendor Identification 1313 */ 1314 static ssize_t target_wwn_vendor_id_show(struct config_item *item, 1315 char *page) 1316 { 1317 return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]); 1318 } 1319 1320 static ssize_t target_wwn_vendor_id_store(struct config_item *item, 1321 const char *page, size_t count) 1322 { 1323 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1324 struct se_device *dev = t10_wwn->t10_dev; 1325 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1326 unsigned char buf[INQUIRY_VENDOR_LEN + 2]; 1327 char *stripped = NULL; 1328 size_t len; 1329 ssize_t ret; 1330 1331 len = strlcpy(buf, page, sizeof(buf)); 1332 if (len < sizeof(buf)) { 1333 /* Strip any newline added from userspace. */ 1334 stripped = strstrip(buf); 1335 len = strlen(stripped); 1336 } 1337 if (len > INQUIRY_VENDOR_LEN) { 1338 pr_err("Emulated T10 Vendor Identification exceeds" 1339 " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN) 1340 "\n"); 1341 return -EOVERFLOW; 1342 } 1343 1344 ret = target_check_inquiry_data(stripped); 1345 1346 if (ret < 0) 1347 return ret; 1348 1349 /* 1350 * Check to see if any active exports exist. If they do exist, fail 1351 * here as changing this information on the fly (underneath the 1352 * initiator side OS dependent multipath code) could cause negative 1353 * effects. 1354 */ 1355 if (dev->export_count) { 1356 pr_err("Unable to set T10 Vendor Identification while" 1357 " active %d exports exist\n", dev->export_count); 1358 return -EINVAL; 1359 } 1360 1361 BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1); 1362 strlcpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor)); 1363 1364 pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:" 1365 " %s\n", dev->t10_wwn.vendor); 1366 1367 return count; 1368 } 1369 1370 static ssize_t target_wwn_product_id_show(struct config_item *item, 1371 char *page) 1372 { 1373 return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]); 1374 } 1375 1376 static ssize_t target_wwn_product_id_store(struct config_item *item, 1377 const char *page, size_t count) 1378 { 1379 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1380 struct se_device *dev = t10_wwn->t10_dev; 1381 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1382 unsigned char buf[INQUIRY_MODEL_LEN + 2]; 1383 char *stripped = NULL; 1384 size_t len; 1385 ssize_t ret; 1386 1387 len = strlcpy(buf, page, sizeof(buf)); 1388 if (len < sizeof(buf)) { 1389 /* Strip any newline added from userspace. */ 1390 stripped = strstrip(buf); 1391 len = strlen(stripped); 1392 } 1393 if (len > INQUIRY_MODEL_LEN) { 1394 pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: " 1395 __stringify(INQUIRY_MODEL_LEN) 1396 "\n"); 1397 return -EOVERFLOW; 1398 } 1399 1400 ret = target_check_inquiry_data(stripped); 1401 1402 if (ret < 0) 1403 return ret; 1404 1405 /* 1406 * Check to see if any active exports exist. If they do exist, fail 1407 * here as changing this information on the fly (underneath the 1408 * initiator side OS dependent multipath code) could cause negative 1409 * effects. 1410 */ 1411 if (dev->export_count) { 1412 pr_err("Unable to set T10 Model while active %d exports exist\n", 1413 dev->export_count); 1414 return -EINVAL; 1415 } 1416 1417 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); 1418 strlcpy(dev->t10_wwn.model, stripped, sizeof(dev->t10_wwn.model)); 1419 1420 pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n", 1421 dev->t10_wwn.model); 1422 1423 return count; 1424 } 1425 1426 static ssize_t target_wwn_revision_show(struct config_item *item, 1427 char *page) 1428 { 1429 return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]); 1430 } 1431 1432 static ssize_t target_wwn_revision_store(struct config_item *item, 1433 const char *page, size_t count) 1434 { 1435 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1436 struct se_device *dev = t10_wwn->t10_dev; 1437 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1438 unsigned char buf[INQUIRY_REVISION_LEN + 2]; 1439 char *stripped = NULL; 1440 size_t len; 1441 ssize_t ret; 1442 1443 len = strlcpy(buf, page, sizeof(buf)); 1444 if (len < sizeof(buf)) { 1445 /* Strip any newline added from userspace. */ 1446 stripped = strstrip(buf); 1447 len = strlen(stripped); 1448 } 1449 if (len > INQUIRY_REVISION_LEN) { 1450 pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: " 1451 __stringify(INQUIRY_REVISION_LEN) 1452 "\n"); 1453 return -EOVERFLOW; 1454 } 1455 1456 ret = target_check_inquiry_data(stripped); 1457 1458 if (ret < 0) 1459 return ret; 1460 1461 /* 1462 * Check to see if any active exports exist. If they do exist, fail 1463 * here as changing this information on the fly (underneath the 1464 * initiator side OS dependent multipath code) could cause negative 1465 * effects. 1466 */ 1467 if (dev->export_count) { 1468 pr_err("Unable to set T10 Revision while active %d exports exist\n", 1469 dev->export_count); 1470 return -EINVAL; 1471 } 1472 1473 BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1); 1474 strlcpy(dev->t10_wwn.revision, stripped, sizeof(dev->t10_wwn.revision)); 1475 1476 pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n", 1477 dev->t10_wwn.revision); 1478 1479 return count; 1480 } 1481 1482 static ssize_t 1483 target_wwn_company_id_show(struct config_item *item, 1484 char *page) 1485 { 1486 return snprintf(page, PAGE_SIZE, "%#08x\n", 1487 to_t10_wwn(item)->company_id); 1488 } 1489 1490 static ssize_t 1491 target_wwn_company_id_store(struct config_item *item, 1492 const char *page, size_t count) 1493 { 1494 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1495 struct se_device *dev = t10_wwn->t10_dev; 1496 u32 val; 1497 int ret; 1498 1499 /* 1500 * The IEEE COMPANY_ID field should contain a 24-bit canonical 1501 * form OUI assigned by the IEEE. 1502 */ 1503 ret = kstrtou32(page, 0, &val); 1504 if (ret < 0) 1505 return ret; 1506 1507 if (val >= 0x1000000) 1508 return -EOVERFLOW; 1509 1510 /* 1511 * Check to see if any active exports exist. If they do exist, fail 1512 * here as changing this information on the fly (underneath the 1513 * initiator side OS dependent multipath code) could cause negative 1514 * effects. 1515 */ 1516 if (dev->export_count) { 1517 pr_err("Unable to set Company ID while %u exports exist\n", 1518 dev->export_count); 1519 return -EINVAL; 1520 } 1521 1522 t10_wwn->company_id = val; 1523 1524 pr_debug("Target_Core_ConfigFS: Set IEEE Company ID: %#08x\n", 1525 t10_wwn->company_id); 1526 1527 return count; 1528 } 1529 1530 /* 1531 * VPD page 0x80 Unit serial 1532 */ 1533 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item, 1534 char *page) 1535 { 1536 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 1537 &to_t10_wwn(item)->unit_serial[0]); 1538 } 1539 1540 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item, 1541 const char *page, size_t count) 1542 { 1543 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1544 struct se_device *dev = t10_wwn->t10_dev; 1545 unsigned char buf[INQUIRY_VPD_SERIAL_LEN] = { }; 1546 1547 /* 1548 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 1549 * from the struct scsi_device level firmware, do not allow 1550 * VPD Unit Serial to be emulated. 1551 * 1552 * Note this struct scsi_device could also be emulating VPD 1553 * information from its drivers/scsi LLD. But for now we assume 1554 * it is doing 'the right thing' wrt a world wide unique 1555 * VPD Unit Serial Number that OS dependent multipath can depend on. 1556 */ 1557 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) { 1558 pr_err("Underlying SCSI device firmware provided VPD" 1559 " Unit Serial, ignoring request\n"); 1560 return -EOPNOTSUPP; 1561 } 1562 1563 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 1564 pr_err("Emulated VPD Unit Serial exceeds" 1565 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 1566 return -EOVERFLOW; 1567 } 1568 /* 1569 * Check to see if any active $FABRIC_MOD exports exist. If they 1570 * do exist, fail here as changing this information on the fly 1571 * (underneath the initiator side OS dependent multipath code) 1572 * could cause negative effects. 1573 */ 1574 if (dev->export_count) { 1575 pr_err("Unable to set VPD Unit Serial while" 1576 " active %d $FABRIC_MOD exports exist\n", 1577 dev->export_count); 1578 return -EINVAL; 1579 } 1580 1581 /* 1582 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 1583 * 1584 * Also, strip any newline added from the userspace 1585 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 1586 */ 1587 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 1588 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 1589 "%s", strstrip(buf)); 1590 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL; 1591 1592 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 1593 " %s\n", dev->t10_wwn.unit_serial); 1594 1595 return count; 1596 } 1597 1598 /* 1599 * VPD page 0x83 Protocol Identifier 1600 */ 1601 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item, 1602 char *page) 1603 { 1604 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1605 struct t10_vpd *vpd; 1606 unsigned char buf[VPD_TMP_BUF_SIZE] = { }; 1607 ssize_t len = 0; 1608 1609 spin_lock(&t10_wwn->t10_vpd_lock); 1610 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 1611 if (!vpd->protocol_identifier_set) 1612 continue; 1613 1614 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 1615 1616 if (len + strlen(buf) >= PAGE_SIZE) 1617 break; 1618 1619 len += sprintf(page+len, "%s", buf); 1620 } 1621 spin_unlock(&t10_wwn->t10_vpd_lock); 1622 1623 return len; 1624 } 1625 1626 /* 1627 * Generic wrapper for dumping VPD identifiers by association. 1628 */ 1629 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 1630 static ssize_t target_wwn_##_name##_show(struct config_item *item, \ 1631 char *page) \ 1632 { \ 1633 struct t10_wwn *t10_wwn = to_t10_wwn(item); \ 1634 struct t10_vpd *vpd; \ 1635 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 1636 ssize_t len = 0; \ 1637 \ 1638 spin_lock(&t10_wwn->t10_vpd_lock); \ 1639 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 1640 if (vpd->association != _assoc) \ 1641 continue; \ 1642 \ 1643 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1644 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 1645 if (len + strlen(buf) >= PAGE_SIZE) \ 1646 break; \ 1647 len += sprintf(page+len, "%s", buf); \ 1648 \ 1649 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1650 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 1651 if (len + strlen(buf) >= PAGE_SIZE) \ 1652 break; \ 1653 len += sprintf(page+len, "%s", buf); \ 1654 \ 1655 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1656 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 1657 if (len + strlen(buf) >= PAGE_SIZE) \ 1658 break; \ 1659 len += sprintf(page+len, "%s", buf); \ 1660 } \ 1661 spin_unlock(&t10_wwn->t10_vpd_lock); \ 1662 \ 1663 return len; \ 1664 } 1665 1666 /* VPD page 0x83 Association: Logical Unit */ 1667 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 1668 /* VPD page 0x83 Association: Target Port */ 1669 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 1670 /* VPD page 0x83 Association: SCSI Target Device */ 1671 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 1672 1673 CONFIGFS_ATTR(target_wwn_, vendor_id); 1674 CONFIGFS_ATTR(target_wwn_, product_id); 1675 CONFIGFS_ATTR(target_wwn_, revision); 1676 CONFIGFS_ATTR(target_wwn_, company_id); 1677 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial); 1678 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier); 1679 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit); 1680 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port); 1681 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device); 1682 1683 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 1684 &target_wwn_attr_vendor_id, 1685 &target_wwn_attr_product_id, 1686 &target_wwn_attr_revision, 1687 &target_wwn_attr_company_id, 1688 &target_wwn_attr_vpd_unit_serial, 1689 &target_wwn_attr_vpd_protocol_identifier, 1690 &target_wwn_attr_vpd_assoc_logical_unit, 1691 &target_wwn_attr_vpd_assoc_target_port, 1692 &target_wwn_attr_vpd_assoc_scsi_target_device, 1693 NULL, 1694 }; 1695 1696 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs); 1697 1698 /* End functions for struct config_item_type tb_dev_wwn_cit */ 1699 1700 /* Start functions for struct config_item_type tb_dev_pr_cit */ 1701 1702 static struct se_device *pr_to_dev(struct config_item *item) 1703 { 1704 return container_of(to_config_group(item), struct se_device, 1705 dev_pr_group); 1706 } 1707 1708 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev, 1709 char *page) 1710 { 1711 struct se_node_acl *se_nacl; 1712 struct t10_pr_registration *pr_reg; 1713 char i_buf[PR_REG_ISID_ID_LEN] = { }; 1714 1715 pr_reg = dev->dev_pr_res_holder; 1716 if (!pr_reg) 1717 return sprintf(page, "No SPC-3 Reservation holder\n"); 1718 1719 se_nacl = pr_reg->pr_reg_nacl; 1720 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1721 1722 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", 1723 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1724 se_nacl->initiatorname, i_buf); 1725 } 1726 1727 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, 1728 char *page) 1729 { 1730 struct se_session *sess = dev->reservation_holder; 1731 struct se_node_acl *se_nacl; 1732 ssize_t len; 1733 1734 if (sess) { 1735 se_nacl = sess->se_node_acl; 1736 len = sprintf(page, 1737 "SPC-2 Reservation: %s Initiator: %s\n", 1738 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1739 se_nacl->initiatorname); 1740 } else { 1741 len = sprintf(page, "No SPC-2 Reservation holder\n"); 1742 } 1743 return len; 1744 } 1745 1746 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page) 1747 { 1748 struct se_device *dev = pr_to_dev(item); 1749 int ret; 1750 1751 if (!dev->dev_attrib.emulate_pr) 1752 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 1753 1754 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1755 return sprintf(page, "Passthrough\n"); 1756 1757 spin_lock(&dev->dev_reservation_lock); 1758 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1759 ret = target_core_dev_pr_show_spc2_res(dev, page); 1760 else 1761 ret = target_core_dev_pr_show_spc3_res(dev, page); 1762 spin_unlock(&dev->dev_reservation_lock); 1763 return ret; 1764 } 1765 1766 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item, 1767 char *page) 1768 { 1769 struct se_device *dev = pr_to_dev(item); 1770 ssize_t len = 0; 1771 1772 spin_lock(&dev->dev_reservation_lock); 1773 if (!dev->dev_pr_res_holder) { 1774 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1775 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { 1776 len = sprintf(page, "SPC-3 Reservation: All Target" 1777 " Ports registration\n"); 1778 } else { 1779 len = sprintf(page, "SPC-3 Reservation: Single" 1780 " Target Port registration\n"); 1781 } 1782 1783 spin_unlock(&dev->dev_reservation_lock); 1784 return len; 1785 } 1786 1787 static ssize_t target_pr_res_pr_generation_show(struct config_item *item, 1788 char *page) 1789 { 1790 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation); 1791 } 1792 1793 1794 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item, 1795 char *page) 1796 { 1797 struct se_device *dev = pr_to_dev(item); 1798 struct se_node_acl *se_nacl; 1799 struct se_portal_group *se_tpg; 1800 struct t10_pr_registration *pr_reg; 1801 const struct target_core_fabric_ops *tfo; 1802 ssize_t len = 0; 1803 1804 spin_lock(&dev->dev_reservation_lock); 1805 pr_reg = dev->dev_pr_res_holder; 1806 if (!pr_reg) { 1807 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1808 goto out_unlock; 1809 } 1810 1811 se_nacl = pr_reg->pr_reg_nacl; 1812 se_tpg = se_nacl->se_tpg; 1813 tfo = se_tpg->se_tpg_tfo; 1814 1815 len += sprintf(page+len, "SPC-3 Reservation: %s" 1816 " Target Node Endpoint: %s\n", tfo->fabric_name, 1817 tfo->tpg_get_wwn(se_tpg)); 1818 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1819 " Identifier Tag: %hu %s Portal Group Tag: %hu" 1820 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi, 1821 tfo->fabric_name, tfo->tpg_get_tag(se_tpg), 1822 tfo->fabric_name, pr_reg->pr_aptpl_target_lun); 1823 1824 out_unlock: 1825 spin_unlock(&dev->dev_reservation_lock); 1826 return len; 1827 } 1828 1829 1830 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item, 1831 char *page) 1832 { 1833 struct se_device *dev = pr_to_dev(item); 1834 const struct target_core_fabric_ops *tfo; 1835 struct t10_pr_registration *pr_reg; 1836 unsigned char buf[384]; 1837 char i_buf[PR_REG_ISID_ID_LEN]; 1838 ssize_t len = 0; 1839 int reg_count = 0; 1840 1841 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1842 1843 spin_lock(&dev->t10_pr.registration_lock); 1844 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1845 pr_reg_list) { 1846 1847 memset(buf, 0, 384); 1848 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1849 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1850 core_pr_dump_initiator_port(pr_reg, i_buf, 1851 PR_REG_ISID_ID_LEN); 1852 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1853 tfo->fabric_name, 1854 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, 1855 pr_reg->pr_res_generation); 1856 1857 if (len + strlen(buf) >= PAGE_SIZE) 1858 break; 1859 1860 len += sprintf(page+len, "%s", buf); 1861 reg_count++; 1862 } 1863 spin_unlock(&dev->t10_pr.registration_lock); 1864 1865 if (!reg_count) 1866 len += sprintf(page+len, "None\n"); 1867 1868 return len; 1869 } 1870 1871 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page) 1872 { 1873 struct se_device *dev = pr_to_dev(item); 1874 struct t10_pr_registration *pr_reg; 1875 ssize_t len = 0; 1876 1877 spin_lock(&dev->dev_reservation_lock); 1878 pr_reg = dev->dev_pr_res_holder; 1879 if (pr_reg) { 1880 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1881 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 1882 } else { 1883 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1884 } 1885 1886 spin_unlock(&dev->dev_reservation_lock); 1887 return len; 1888 } 1889 1890 static ssize_t target_pr_res_type_show(struct config_item *item, char *page) 1891 { 1892 struct se_device *dev = pr_to_dev(item); 1893 1894 if (!dev->dev_attrib.emulate_pr) 1895 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 1896 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1897 return sprintf(page, "SPC_PASSTHROUGH\n"); 1898 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1899 return sprintf(page, "SPC2_RESERVATIONS\n"); 1900 1901 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 1902 } 1903 1904 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item, 1905 char *page) 1906 { 1907 struct se_device *dev = pr_to_dev(item); 1908 1909 if (!dev->dev_attrib.emulate_pr || 1910 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 1911 return 0; 1912 1913 return sprintf(page, "APTPL Bit Status: %s\n", 1914 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 1915 } 1916 1917 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item, 1918 char *page) 1919 { 1920 struct se_device *dev = pr_to_dev(item); 1921 1922 if (!dev->dev_attrib.emulate_pr || 1923 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 1924 return 0; 1925 1926 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 1927 } 1928 1929 enum { 1930 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 1931 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 1932 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 1933 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 1934 }; 1935 1936 static match_table_t tokens = { 1937 {Opt_initiator_fabric, "initiator_fabric=%s"}, 1938 {Opt_initiator_node, "initiator_node=%s"}, 1939 {Opt_initiator_sid, "initiator_sid=%s"}, 1940 {Opt_sa_res_key, "sa_res_key=%s"}, 1941 {Opt_res_holder, "res_holder=%d"}, 1942 {Opt_res_type, "res_type=%d"}, 1943 {Opt_res_scope, "res_scope=%d"}, 1944 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 1945 {Opt_mapped_lun, "mapped_lun=%u"}, 1946 {Opt_target_fabric, "target_fabric=%s"}, 1947 {Opt_target_node, "target_node=%s"}, 1948 {Opt_tpgt, "tpgt=%d"}, 1949 {Opt_port_rtpi, "port_rtpi=%d"}, 1950 {Opt_target_lun, "target_lun=%u"}, 1951 {Opt_err, NULL} 1952 }; 1953 1954 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item, 1955 const char *page, size_t count) 1956 { 1957 struct se_device *dev = pr_to_dev(item); 1958 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 1959 unsigned char *t_fabric = NULL, *t_port = NULL; 1960 char *orig, *ptr, *opts; 1961 substring_t args[MAX_OPT_ARGS]; 1962 unsigned long long tmp_ll; 1963 u64 sa_res_key = 0; 1964 u64 mapped_lun = 0, target_lun = 0; 1965 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 1966 u16 tpgt = 0; 1967 u8 type = 0; 1968 1969 if (!dev->dev_attrib.emulate_pr || 1970 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 1971 return count; 1972 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1973 return count; 1974 1975 if (dev->export_count) { 1976 pr_debug("Unable to process APTPL metadata while" 1977 " active fabric exports exist\n"); 1978 return -EINVAL; 1979 } 1980 1981 opts = kstrdup(page, GFP_KERNEL); 1982 if (!opts) 1983 return -ENOMEM; 1984 1985 orig = opts; 1986 while ((ptr = strsep(&opts, ",\n")) != NULL) { 1987 if (!*ptr) 1988 continue; 1989 1990 token = match_token(ptr, tokens, args); 1991 switch (token) { 1992 case Opt_initiator_fabric: 1993 i_fabric = match_strdup(args); 1994 if (!i_fabric) { 1995 ret = -ENOMEM; 1996 goto out; 1997 } 1998 break; 1999 case Opt_initiator_node: 2000 i_port = match_strdup(args); 2001 if (!i_port) { 2002 ret = -ENOMEM; 2003 goto out; 2004 } 2005 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 2006 pr_err("APTPL metadata initiator_node=" 2007 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 2008 PR_APTPL_MAX_IPORT_LEN); 2009 ret = -EINVAL; 2010 break; 2011 } 2012 break; 2013 case Opt_initiator_sid: 2014 isid = match_strdup(args); 2015 if (!isid) { 2016 ret = -ENOMEM; 2017 goto out; 2018 } 2019 if (strlen(isid) >= PR_REG_ISID_LEN) { 2020 pr_err("APTPL metadata initiator_isid" 2021 "= exceeds PR_REG_ISID_LEN: %d\n", 2022 PR_REG_ISID_LEN); 2023 ret = -EINVAL; 2024 break; 2025 } 2026 break; 2027 case Opt_sa_res_key: 2028 ret = match_u64(args, &tmp_ll); 2029 if (ret < 0) { 2030 pr_err("kstrtoull() failed for sa_res_key=\n"); 2031 goto out; 2032 } 2033 sa_res_key = (u64)tmp_ll; 2034 break; 2035 /* 2036 * PR APTPL Metadata for Reservation 2037 */ 2038 case Opt_res_holder: 2039 ret = match_int(args, &arg); 2040 if (ret) 2041 goto out; 2042 res_holder = arg; 2043 break; 2044 case Opt_res_type: 2045 ret = match_int(args, &arg); 2046 if (ret) 2047 goto out; 2048 type = (u8)arg; 2049 break; 2050 case Opt_res_scope: 2051 ret = match_int(args, &arg); 2052 if (ret) 2053 goto out; 2054 break; 2055 case Opt_res_all_tg_pt: 2056 ret = match_int(args, &arg); 2057 if (ret) 2058 goto out; 2059 all_tg_pt = (int)arg; 2060 break; 2061 case Opt_mapped_lun: 2062 ret = match_u64(args, &tmp_ll); 2063 if (ret) 2064 goto out; 2065 mapped_lun = (u64)tmp_ll; 2066 break; 2067 /* 2068 * PR APTPL Metadata for Target Port 2069 */ 2070 case Opt_target_fabric: 2071 t_fabric = match_strdup(args); 2072 if (!t_fabric) { 2073 ret = -ENOMEM; 2074 goto out; 2075 } 2076 break; 2077 case Opt_target_node: 2078 t_port = match_strdup(args); 2079 if (!t_port) { 2080 ret = -ENOMEM; 2081 goto out; 2082 } 2083 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 2084 pr_err("APTPL metadata target_node=" 2085 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 2086 PR_APTPL_MAX_TPORT_LEN); 2087 ret = -EINVAL; 2088 break; 2089 } 2090 break; 2091 case Opt_tpgt: 2092 ret = match_int(args, &arg); 2093 if (ret) 2094 goto out; 2095 tpgt = (u16)arg; 2096 break; 2097 case Opt_port_rtpi: 2098 ret = match_int(args, &arg); 2099 if (ret) 2100 goto out; 2101 break; 2102 case Opt_target_lun: 2103 ret = match_u64(args, &tmp_ll); 2104 if (ret) 2105 goto out; 2106 target_lun = (u64)tmp_ll; 2107 break; 2108 default: 2109 break; 2110 } 2111 } 2112 2113 if (!i_port || !t_port || !sa_res_key) { 2114 pr_err("Illegal parameters for APTPL registration\n"); 2115 ret = -EINVAL; 2116 goto out; 2117 } 2118 2119 if (res_holder && !(type)) { 2120 pr_err("Illegal PR type: 0x%02x for reservation" 2121 " holder\n", type); 2122 ret = -EINVAL; 2123 goto out; 2124 } 2125 2126 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, 2127 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 2128 res_holder, all_tg_pt, type); 2129 out: 2130 kfree(i_fabric); 2131 kfree(i_port); 2132 kfree(isid); 2133 kfree(t_fabric); 2134 kfree(t_port); 2135 kfree(orig); 2136 return (ret == 0) ? count : ret; 2137 } 2138 2139 2140 CONFIGFS_ATTR_RO(target_pr_, res_holder); 2141 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts); 2142 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation); 2143 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port); 2144 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts); 2145 CONFIGFS_ATTR_RO(target_pr_, res_pr_type); 2146 CONFIGFS_ATTR_RO(target_pr_, res_type); 2147 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active); 2148 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata); 2149 2150 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 2151 &target_pr_attr_res_holder, 2152 &target_pr_attr_res_pr_all_tgt_pts, 2153 &target_pr_attr_res_pr_generation, 2154 &target_pr_attr_res_pr_holder_tg_port, 2155 &target_pr_attr_res_pr_registered_i_pts, 2156 &target_pr_attr_res_pr_type, 2157 &target_pr_attr_res_type, 2158 &target_pr_attr_res_aptpl_active, 2159 &target_pr_attr_res_aptpl_metadata, 2160 NULL, 2161 }; 2162 2163 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs); 2164 2165 /* End functions for struct config_item_type tb_dev_pr_cit */ 2166 2167 /* Start functions for struct config_item_type tb_dev_cit */ 2168 2169 static inline struct se_device *to_device(struct config_item *item) 2170 { 2171 return container_of(to_config_group(item), struct se_device, dev_group); 2172 } 2173 2174 static ssize_t target_dev_info_show(struct config_item *item, char *page) 2175 { 2176 struct se_device *dev = to_device(item); 2177 int bl = 0; 2178 ssize_t read_bytes = 0; 2179 2180 transport_dump_dev_state(dev, page, &bl); 2181 read_bytes += bl; 2182 read_bytes += dev->transport->show_configfs_dev_params(dev, 2183 page+read_bytes); 2184 return read_bytes; 2185 } 2186 2187 static ssize_t target_dev_control_store(struct config_item *item, 2188 const char *page, size_t count) 2189 { 2190 struct se_device *dev = to_device(item); 2191 2192 return dev->transport->set_configfs_dev_params(dev, page, count); 2193 } 2194 2195 static ssize_t target_dev_alias_show(struct config_item *item, char *page) 2196 { 2197 struct se_device *dev = to_device(item); 2198 2199 if (!(dev->dev_flags & DF_USING_ALIAS)) 2200 return 0; 2201 2202 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); 2203 } 2204 2205 static ssize_t target_dev_alias_store(struct config_item *item, 2206 const char *page, size_t count) 2207 { 2208 struct se_device *dev = to_device(item); 2209 struct se_hba *hba = dev->se_hba; 2210 ssize_t read_bytes; 2211 2212 if (count > (SE_DEV_ALIAS_LEN-1)) { 2213 pr_err("alias count: %d exceeds" 2214 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 2215 SE_DEV_ALIAS_LEN-1); 2216 return -EINVAL; 2217 } 2218 2219 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); 2220 if (!read_bytes) 2221 return -EINVAL; 2222 if (dev->dev_alias[read_bytes - 1] == '\n') 2223 dev->dev_alias[read_bytes - 1] = '\0'; 2224 2225 dev->dev_flags |= DF_USING_ALIAS; 2226 2227 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 2228 config_item_name(&hba->hba_group.cg_item), 2229 config_item_name(&dev->dev_group.cg_item), 2230 dev->dev_alias); 2231 2232 return read_bytes; 2233 } 2234 2235 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page) 2236 { 2237 struct se_device *dev = to_device(item); 2238 2239 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) 2240 return 0; 2241 2242 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); 2243 } 2244 2245 static ssize_t target_dev_udev_path_store(struct config_item *item, 2246 const char *page, size_t count) 2247 { 2248 struct se_device *dev = to_device(item); 2249 struct se_hba *hba = dev->se_hba; 2250 ssize_t read_bytes; 2251 2252 if (count > (SE_UDEV_PATH_LEN-1)) { 2253 pr_err("udev_path count: %d exceeds" 2254 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 2255 SE_UDEV_PATH_LEN-1); 2256 return -EINVAL; 2257 } 2258 2259 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, 2260 "%s", page); 2261 if (!read_bytes) 2262 return -EINVAL; 2263 if (dev->udev_path[read_bytes - 1] == '\n') 2264 dev->udev_path[read_bytes - 1] = '\0'; 2265 2266 dev->dev_flags |= DF_USING_UDEV_PATH; 2267 2268 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 2269 config_item_name(&hba->hba_group.cg_item), 2270 config_item_name(&dev->dev_group.cg_item), 2271 dev->udev_path); 2272 2273 return read_bytes; 2274 } 2275 2276 static ssize_t target_dev_enable_show(struct config_item *item, char *page) 2277 { 2278 struct se_device *dev = to_device(item); 2279 2280 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev)); 2281 } 2282 2283 static ssize_t target_dev_enable_store(struct config_item *item, 2284 const char *page, size_t count) 2285 { 2286 struct se_device *dev = to_device(item); 2287 char *ptr; 2288 int ret; 2289 2290 ptr = strstr(page, "1"); 2291 if (!ptr) { 2292 pr_err("For dev_enable ops, only valid value" 2293 " is \"1\"\n"); 2294 return -EINVAL; 2295 } 2296 2297 ret = target_configure_device(dev); 2298 if (ret) 2299 return ret; 2300 return count; 2301 } 2302 2303 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page) 2304 { 2305 struct se_device *dev = to_device(item); 2306 struct config_item *lu_ci; 2307 struct t10_alua_lu_gp *lu_gp; 2308 struct t10_alua_lu_gp_member *lu_gp_mem; 2309 ssize_t len = 0; 2310 2311 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2312 if (!lu_gp_mem) 2313 return 0; 2314 2315 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2316 lu_gp = lu_gp_mem->lu_gp; 2317 if (lu_gp) { 2318 lu_ci = &lu_gp->lu_gp_group.cg_item; 2319 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 2320 config_item_name(lu_ci), lu_gp->lu_gp_id); 2321 } 2322 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2323 2324 return len; 2325 } 2326 2327 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item, 2328 const char *page, size_t count) 2329 { 2330 struct se_device *dev = to_device(item); 2331 struct se_hba *hba = dev->se_hba; 2332 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 2333 struct t10_alua_lu_gp_member *lu_gp_mem; 2334 unsigned char buf[LU_GROUP_NAME_BUF] = { }; 2335 int move = 0; 2336 2337 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2338 if (!lu_gp_mem) 2339 return count; 2340 2341 if (count > LU_GROUP_NAME_BUF) { 2342 pr_err("ALUA LU Group Alias too large!\n"); 2343 return -EINVAL; 2344 } 2345 memcpy(buf, page, count); 2346 /* 2347 * Any ALUA logical unit alias besides "NULL" means we will be 2348 * making a new group association. 2349 */ 2350 if (strcmp(strstrip(buf), "NULL")) { 2351 /* 2352 * core_alua_get_lu_gp_by_name() will increment reference to 2353 * struct t10_alua_lu_gp. This reference is released with 2354 * core_alua_get_lu_gp_by_name below(). 2355 */ 2356 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 2357 if (!lu_gp_new) 2358 return -ENODEV; 2359 } 2360 2361 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2362 lu_gp = lu_gp_mem->lu_gp; 2363 if (lu_gp) { 2364 /* 2365 * Clearing an existing lu_gp association, and replacing 2366 * with NULL 2367 */ 2368 if (!lu_gp_new) { 2369 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 2370 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 2371 " %hu\n", 2372 config_item_name(&hba->hba_group.cg_item), 2373 config_item_name(&dev->dev_group.cg_item), 2374 config_item_name(&lu_gp->lu_gp_group.cg_item), 2375 lu_gp->lu_gp_id); 2376 2377 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2378 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2379 2380 return count; 2381 } 2382 /* 2383 * Removing existing association of lu_gp_mem with lu_gp 2384 */ 2385 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2386 move = 1; 2387 } 2388 /* 2389 * Associate lu_gp_mem with lu_gp_new. 2390 */ 2391 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 2392 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2393 2394 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 2395 " core/alua/lu_gps/%s, ID: %hu\n", 2396 (move) ? "Moving" : "Adding", 2397 config_item_name(&hba->hba_group.cg_item), 2398 config_item_name(&dev->dev_group.cg_item), 2399 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 2400 lu_gp_new->lu_gp_id); 2401 2402 core_alua_put_lu_gp_from_name(lu_gp_new); 2403 return count; 2404 } 2405 2406 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page) 2407 { 2408 struct se_device *dev = to_device(item); 2409 struct t10_alua_lba_map *map; 2410 struct t10_alua_lba_map_member *mem; 2411 char *b = page; 2412 int bl = 0; 2413 char state; 2414 2415 spin_lock(&dev->t10_alua.lba_map_lock); 2416 if (!list_empty(&dev->t10_alua.lba_map_list)) 2417 bl += sprintf(b + bl, "%u %u\n", 2418 dev->t10_alua.lba_map_segment_size, 2419 dev->t10_alua.lba_map_segment_multiplier); 2420 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) { 2421 bl += sprintf(b + bl, "%llu %llu", 2422 map->lba_map_first_lba, map->lba_map_last_lba); 2423 list_for_each_entry(mem, &map->lba_map_mem_list, 2424 lba_map_mem_list) { 2425 switch (mem->lba_map_mem_alua_state) { 2426 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: 2427 state = 'O'; 2428 break; 2429 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: 2430 state = 'A'; 2431 break; 2432 case ALUA_ACCESS_STATE_STANDBY: 2433 state = 'S'; 2434 break; 2435 case ALUA_ACCESS_STATE_UNAVAILABLE: 2436 state = 'U'; 2437 break; 2438 default: 2439 state = '.'; 2440 break; 2441 } 2442 bl += sprintf(b + bl, " %d:%c", 2443 mem->lba_map_mem_alua_pg_id, state); 2444 } 2445 bl += sprintf(b + bl, "\n"); 2446 } 2447 spin_unlock(&dev->t10_alua.lba_map_lock); 2448 return bl; 2449 } 2450 2451 static ssize_t target_dev_lba_map_store(struct config_item *item, 2452 const char *page, size_t count) 2453 { 2454 struct se_device *dev = to_device(item); 2455 struct t10_alua_lba_map *lba_map = NULL; 2456 struct list_head lba_list; 2457 char *map_entries, *orig, *ptr; 2458 char state; 2459 int pg_num = -1, pg; 2460 int ret = 0, num = 0, pg_id, alua_state; 2461 unsigned long start_lba = -1, end_lba = -1; 2462 unsigned long segment_size = -1, segment_mult = -1; 2463 2464 orig = map_entries = kstrdup(page, GFP_KERNEL); 2465 if (!map_entries) 2466 return -ENOMEM; 2467 2468 INIT_LIST_HEAD(&lba_list); 2469 while ((ptr = strsep(&map_entries, "\n")) != NULL) { 2470 if (!*ptr) 2471 continue; 2472 2473 if (num == 0) { 2474 if (sscanf(ptr, "%lu %lu\n", 2475 &segment_size, &segment_mult) != 2) { 2476 pr_err("Invalid line %d\n", num); 2477 ret = -EINVAL; 2478 break; 2479 } 2480 num++; 2481 continue; 2482 } 2483 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) { 2484 pr_err("Invalid line %d\n", num); 2485 ret = -EINVAL; 2486 break; 2487 } 2488 ptr = strchr(ptr, ' '); 2489 if (!ptr) { 2490 pr_err("Invalid line %d, missing end lba\n", num); 2491 ret = -EINVAL; 2492 break; 2493 } 2494 ptr++; 2495 ptr = strchr(ptr, ' '); 2496 if (!ptr) { 2497 pr_err("Invalid line %d, missing state definitions\n", 2498 num); 2499 ret = -EINVAL; 2500 break; 2501 } 2502 ptr++; 2503 lba_map = core_alua_allocate_lba_map(&lba_list, 2504 start_lba, end_lba); 2505 if (IS_ERR(lba_map)) { 2506 ret = PTR_ERR(lba_map); 2507 break; 2508 } 2509 pg = 0; 2510 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) { 2511 switch (state) { 2512 case 'O': 2513 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED; 2514 break; 2515 case 'A': 2516 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED; 2517 break; 2518 case 'S': 2519 alua_state = ALUA_ACCESS_STATE_STANDBY; 2520 break; 2521 case 'U': 2522 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE; 2523 break; 2524 default: 2525 pr_err("Invalid ALUA state '%c'\n", state); 2526 ret = -EINVAL; 2527 goto out; 2528 } 2529 2530 ret = core_alua_allocate_lba_map_mem(lba_map, 2531 pg_id, alua_state); 2532 if (ret) { 2533 pr_err("Invalid target descriptor %d:%c " 2534 "at line %d\n", 2535 pg_id, state, num); 2536 break; 2537 } 2538 pg++; 2539 ptr = strchr(ptr, ' '); 2540 if (ptr) 2541 ptr++; 2542 else 2543 break; 2544 } 2545 if (pg_num == -1) 2546 pg_num = pg; 2547 else if (pg != pg_num) { 2548 pr_err("Only %d from %d port groups definitions " 2549 "at line %d\n", pg, pg_num, num); 2550 ret = -EINVAL; 2551 break; 2552 } 2553 num++; 2554 } 2555 out: 2556 if (ret) { 2557 core_alua_free_lba_map(&lba_list); 2558 count = ret; 2559 } else 2560 core_alua_set_lba_map(dev, &lba_list, 2561 segment_size, segment_mult); 2562 kfree(orig); 2563 return count; 2564 } 2565 2566 CONFIGFS_ATTR_RO(target_dev_, info); 2567 CONFIGFS_ATTR_WO(target_dev_, control); 2568 CONFIGFS_ATTR(target_dev_, alias); 2569 CONFIGFS_ATTR(target_dev_, udev_path); 2570 CONFIGFS_ATTR(target_dev_, enable); 2571 CONFIGFS_ATTR(target_dev_, alua_lu_gp); 2572 CONFIGFS_ATTR(target_dev_, lba_map); 2573 2574 static struct configfs_attribute *target_core_dev_attrs[] = { 2575 &target_dev_attr_info, 2576 &target_dev_attr_control, 2577 &target_dev_attr_alias, 2578 &target_dev_attr_udev_path, 2579 &target_dev_attr_enable, 2580 &target_dev_attr_alua_lu_gp, 2581 &target_dev_attr_lba_map, 2582 NULL, 2583 }; 2584 2585 static void target_core_dev_release(struct config_item *item) 2586 { 2587 struct config_group *dev_cg = to_config_group(item); 2588 struct se_device *dev = 2589 container_of(dev_cg, struct se_device, dev_group); 2590 2591 target_free_device(dev); 2592 } 2593 2594 /* 2595 * Used in target_core_fabric_configfs.c to verify valid se_device symlink 2596 * within target_fabric_port_link() 2597 */ 2598 struct configfs_item_operations target_core_dev_item_ops = { 2599 .release = target_core_dev_release, 2600 }; 2601 2602 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs); 2603 2604 /* End functions for struct config_item_type tb_dev_cit */ 2605 2606 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 2607 2608 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item) 2609 { 2610 return container_of(to_config_group(item), struct t10_alua_lu_gp, 2611 lu_gp_group); 2612 } 2613 2614 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page) 2615 { 2616 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2617 2618 if (!lu_gp->lu_gp_valid_id) 2619 return 0; 2620 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2621 } 2622 2623 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item, 2624 const char *page, size_t count) 2625 { 2626 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2627 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2628 unsigned long lu_gp_id; 2629 int ret; 2630 2631 ret = kstrtoul(page, 0, &lu_gp_id); 2632 if (ret < 0) { 2633 pr_err("kstrtoul() returned %d for" 2634 " lu_gp_id\n", ret); 2635 return ret; 2636 } 2637 if (lu_gp_id > 0x0000ffff) { 2638 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 2639 " 0x0000ffff\n", lu_gp_id); 2640 return -EINVAL; 2641 } 2642 2643 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2644 if (ret < 0) 2645 return -EINVAL; 2646 2647 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 2648 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2649 config_item_name(&alua_lu_gp_cg->cg_item), 2650 lu_gp->lu_gp_id); 2651 2652 return count; 2653 } 2654 2655 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page) 2656 { 2657 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2658 struct se_device *dev; 2659 struct se_hba *hba; 2660 struct t10_alua_lu_gp_member *lu_gp_mem; 2661 ssize_t len = 0, cur_len; 2662 unsigned char buf[LU_GROUP_NAME_BUF] = { }; 2663 2664 spin_lock(&lu_gp->lu_gp_lock); 2665 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2666 dev = lu_gp_mem->lu_gp_mem_dev; 2667 hba = dev->se_hba; 2668 2669 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 2670 config_item_name(&hba->hba_group.cg_item), 2671 config_item_name(&dev->dev_group.cg_item)); 2672 cur_len++; /* Extra byte for NULL terminator */ 2673 2674 if ((cur_len + len) > PAGE_SIZE) { 2675 pr_warn("Ran out of lu_gp_show_attr" 2676 "_members buffer\n"); 2677 break; 2678 } 2679 memcpy(page+len, buf, cur_len); 2680 len += cur_len; 2681 } 2682 spin_unlock(&lu_gp->lu_gp_lock); 2683 2684 return len; 2685 } 2686 2687 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id); 2688 CONFIGFS_ATTR_RO(target_lu_gp_, members); 2689 2690 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2691 &target_lu_gp_attr_lu_gp_id, 2692 &target_lu_gp_attr_members, 2693 NULL, 2694 }; 2695 2696 static void target_core_alua_lu_gp_release(struct config_item *item) 2697 { 2698 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2699 struct t10_alua_lu_gp, lu_gp_group); 2700 2701 core_alua_free_lu_gp(lu_gp); 2702 } 2703 2704 static struct configfs_item_operations target_core_alua_lu_gp_ops = { 2705 .release = target_core_alua_lu_gp_release, 2706 }; 2707 2708 static const struct config_item_type target_core_alua_lu_gp_cit = { 2709 .ct_item_ops = &target_core_alua_lu_gp_ops, 2710 .ct_attrs = target_core_alua_lu_gp_attrs, 2711 .ct_owner = THIS_MODULE, 2712 }; 2713 2714 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2715 2716 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2717 2718 static struct config_group *target_core_alua_create_lu_gp( 2719 struct config_group *group, 2720 const char *name) 2721 { 2722 struct t10_alua_lu_gp *lu_gp; 2723 struct config_group *alua_lu_gp_cg = NULL; 2724 struct config_item *alua_lu_gp_ci = NULL; 2725 2726 lu_gp = core_alua_allocate_lu_gp(name, 0); 2727 if (IS_ERR(lu_gp)) 2728 return NULL; 2729 2730 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2731 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2732 2733 config_group_init_type_name(alua_lu_gp_cg, name, 2734 &target_core_alua_lu_gp_cit); 2735 2736 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2737 " Group: core/alua/lu_gps/%s\n", 2738 config_item_name(alua_lu_gp_ci)); 2739 2740 return alua_lu_gp_cg; 2741 2742 } 2743 2744 static void target_core_alua_drop_lu_gp( 2745 struct config_group *group, 2746 struct config_item *item) 2747 { 2748 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2749 struct t10_alua_lu_gp, lu_gp_group); 2750 2751 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2752 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2753 config_item_name(item), lu_gp->lu_gp_id); 2754 /* 2755 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 2756 * -> target_core_alua_lu_gp_release() 2757 */ 2758 config_item_put(item); 2759 } 2760 2761 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2762 .make_group = &target_core_alua_create_lu_gp, 2763 .drop_item = &target_core_alua_drop_lu_gp, 2764 }; 2765 2766 static const struct config_item_type target_core_alua_lu_gps_cit = { 2767 .ct_item_ops = NULL, 2768 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2769 .ct_owner = THIS_MODULE, 2770 }; 2771 2772 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2773 2774 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2775 2776 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item) 2777 { 2778 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp, 2779 tg_pt_gp_group); 2780 } 2781 2782 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item, 2783 char *page) 2784 { 2785 return sprintf(page, "%d\n", 2786 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state); 2787 } 2788 2789 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item, 2790 const char *page, size_t count) 2791 { 2792 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2793 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; 2794 unsigned long tmp; 2795 int new_state, ret; 2796 2797 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2798 pr_err("Unable to do implicit ALUA on invalid tg_pt_gp ID\n"); 2799 return -EINVAL; 2800 } 2801 if (!target_dev_configured(dev)) { 2802 pr_err("Unable to set alua_access_state while device is" 2803 " not configured\n"); 2804 return -ENODEV; 2805 } 2806 2807 ret = kstrtoul(page, 0, &tmp); 2808 if (ret < 0) { 2809 pr_err("Unable to extract new ALUA access state from" 2810 " %s\n", page); 2811 return ret; 2812 } 2813 new_state = (int)tmp; 2814 2815 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) { 2816 pr_err("Unable to process implicit configfs ALUA" 2817 " transition while TPGS_IMPLICIT_ALUA is disabled\n"); 2818 return -EINVAL; 2819 } 2820 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA && 2821 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) { 2822 /* LBA DEPENDENT is only allowed with implicit ALUA */ 2823 pr_err("Unable to process implicit configfs ALUA transition" 2824 " while explicit ALUA management is enabled\n"); 2825 return -EINVAL; 2826 } 2827 2828 ret = core_alua_do_port_transition(tg_pt_gp, dev, 2829 NULL, NULL, new_state, 0); 2830 return (!ret) ? count : -EINVAL; 2831 } 2832 2833 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item, 2834 char *page) 2835 { 2836 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2837 return sprintf(page, "%s\n", 2838 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2839 } 2840 2841 static ssize_t target_tg_pt_gp_alua_access_status_store( 2842 struct config_item *item, const char *page, size_t count) 2843 { 2844 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2845 unsigned long tmp; 2846 int new_status, ret; 2847 2848 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2849 pr_err("Unable to set ALUA access status on invalid tg_pt_gp ID\n"); 2850 return -EINVAL; 2851 } 2852 2853 ret = kstrtoul(page, 0, &tmp); 2854 if (ret < 0) { 2855 pr_err("Unable to extract new ALUA access status" 2856 " from %s\n", page); 2857 return ret; 2858 } 2859 new_status = (int)tmp; 2860 2861 if ((new_status != ALUA_STATUS_NONE) && 2862 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && 2863 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { 2864 pr_err("Illegal ALUA access status: 0x%02x\n", 2865 new_status); 2866 return -EINVAL; 2867 } 2868 2869 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2870 return count; 2871 } 2872 2873 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item, 2874 char *page) 2875 { 2876 return core_alua_show_access_type(to_tg_pt_gp(item), page); 2877 } 2878 2879 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item, 2880 const char *page, size_t count) 2881 { 2882 return core_alua_store_access_type(to_tg_pt_gp(item), page, count); 2883 } 2884 2885 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \ 2886 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \ 2887 struct config_item *item, char *p) \ 2888 { \ 2889 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 2890 return sprintf(p, "%d\n", \ 2891 !!(t->tg_pt_gp_alua_supported_states & _bit)); \ 2892 } \ 2893 \ 2894 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \ 2895 struct config_item *item, const char *p, size_t c) \ 2896 { \ 2897 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 2898 unsigned long tmp; \ 2899 int ret; \ 2900 \ 2901 if (!t->tg_pt_gp_valid_id) { \ 2902 pr_err("Unable to set " #_name " ALUA state on invalid tg_pt_gp ID\n"); \ 2903 return -EINVAL; \ 2904 } \ 2905 \ 2906 ret = kstrtoul(p, 0, &tmp); \ 2907 if (ret < 0) { \ 2908 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \ 2909 return -EINVAL; \ 2910 } \ 2911 if (tmp > 1) { \ 2912 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \ 2913 return -EINVAL; \ 2914 } \ 2915 if (tmp) \ 2916 t->tg_pt_gp_alua_supported_states |= _bit; \ 2917 else \ 2918 t->tg_pt_gp_alua_supported_states &= ~_bit; \ 2919 \ 2920 return c; \ 2921 } 2922 2923 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP); 2924 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP); 2925 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP); 2926 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP); 2927 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP); 2928 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP); 2929 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP); 2930 2931 static ssize_t target_tg_pt_gp_alua_write_metadata_show( 2932 struct config_item *item, char *page) 2933 { 2934 return sprintf(page, "%d\n", 2935 to_tg_pt_gp(item)->tg_pt_gp_write_metadata); 2936 } 2937 2938 static ssize_t target_tg_pt_gp_alua_write_metadata_store( 2939 struct config_item *item, const char *page, size_t count) 2940 { 2941 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2942 unsigned long tmp; 2943 int ret; 2944 2945 ret = kstrtoul(page, 0, &tmp); 2946 if (ret < 0) { 2947 pr_err("Unable to extract alua_write_metadata\n"); 2948 return ret; 2949 } 2950 2951 if ((tmp != 0) && (tmp != 1)) { 2952 pr_err("Illegal value for alua_write_metadata:" 2953 " %lu\n", tmp); 2954 return -EINVAL; 2955 } 2956 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 2957 2958 return count; 2959 } 2960 2961 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item, 2962 char *page) 2963 { 2964 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page); 2965 } 2966 2967 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item, 2968 const char *page, size_t count) 2969 { 2970 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page, 2971 count); 2972 } 2973 2974 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item, 2975 char *page) 2976 { 2977 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page); 2978 } 2979 2980 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item, 2981 const char *page, size_t count) 2982 { 2983 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page, 2984 count); 2985 } 2986 2987 static ssize_t target_tg_pt_gp_implicit_trans_secs_show( 2988 struct config_item *item, char *page) 2989 { 2990 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page); 2991 } 2992 2993 static ssize_t target_tg_pt_gp_implicit_trans_secs_store( 2994 struct config_item *item, const char *page, size_t count) 2995 { 2996 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page, 2997 count); 2998 } 2999 3000 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item, 3001 char *page) 3002 { 3003 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page); 3004 } 3005 3006 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item, 3007 const char *page, size_t count) 3008 { 3009 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count); 3010 } 3011 3012 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item, 3013 char *page) 3014 { 3015 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3016 3017 if (!tg_pt_gp->tg_pt_gp_valid_id) 3018 return 0; 3019 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 3020 } 3021 3022 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item, 3023 const char *page, size_t count) 3024 { 3025 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3026 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 3027 unsigned long tg_pt_gp_id; 3028 int ret; 3029 3030 ret = kstrtoul(page, 0, &tg_pt_gp_id); 3031 if (ret < 0) { 3032 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n", 3033 page); 3034 return ret; 3035 } 3036 if (tg_pt_gp_id > 0x0000ffff) { 3037 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n", 3038 tg_pt_gp_id); 3039 return -EINVAL; 3040 } 3041 3042 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 3043 if (ret < 0) 3044 return -EINVAL; 3045 3046 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 3047 "core/alua/tg_pt_gps/%s to ID: %hu\n", 3048 config_item_name(&alua_tg_pt_gp_cg->cg_item), 3049 tg_pt_gp->tg_pt_gp_id); 3050 3051 return count; 3052 } 3053 3054 static ssize_t target_tg_pt_gp_members_show(struct config_item *item, 3055 char *page) 3056 { 3057 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3058 struct se_lun *lun; 3059 ssize_t len = 0, cur_len; 3060 unsigned char buf[TG_PT_GROUP_NAME_BUF] = { }; 3061 3062 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 3063 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, 3064 lun_tg_pt_gp_link) { 3065 struct se_portal_group *tpg = lun->lun_tpg; 3066 3067 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 3068 "/%s\n", tpg->se_tpg_tfo->fabric_name, 3069 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 3070 tpg->se_tpg_tfo->tpg_get_tag(tpg), 3071 config_item_name(&lun->lun_group.cg_item)); 3072 cur_len++; /* Extra byte for NULL terminator */ 3073 3074 if ((cur_len + len) > PAGE_SIZE) { 3075 pr_warn("Ran out of lu_gp_show_attr" 3076 "_members buffer\n"); 3077 break; 3078 } 3079 memcpy(page+len, buf, cur_len); 3080 len += cur_len; 3081 } 3082 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 3083 3084 return len; 3085 } 3086 3087 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state); 3088 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status); 3089 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type); 3090 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning); 3091 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline); 3092 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent); 3093 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable); 3094 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby); 3095 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized); 3096 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized); 3097 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata); 3098 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs); 3099 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs); 3100 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs); 3101 CONFIGFS_ATTR(target_tg_pt_gp_, preferred); 3102 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id); 3103 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members); 3104 3105 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 3106 &target_tg_pt_gp_attr_alua_access_state, 3107 &target_tg_pt_gp_attr_alua_access_status, 3108 &target_tg_pt_gp_attr_alua_access_type, 3109 &target_tg_pt_gp_attr_alua_support_transitioning, 3110 &target_tg_pt_gp_attr_alua_support_offline, 3111 &target_tg_pt_gp_attr_alua_support_lba_dependent, 3112 &target_tg_pt_gp_attr_alua_support_unavailable, 3113 &target_tg_pt_gp_attr_alua_support_standby, 3114 &target_tg_pt_gp_attr_alua_support_active_nonoptimized, 3115 &target_tg_pt_gp_attr_alua_support_active_optimized, 3116 &target_tg_pt_gp_attr_alua_write_metadata, 3117 &target_tg_pt_gp_attr_nonop_delay_msecs, 3118 &target_tg_pt_gp_attr_trans_delay_msecs, 3119 &target_tg_pt_gp_attr_implicit_trans_secs, 3120 &target_tg_pt_gp_attr_preferred, 3121 &target_tg_pt_gp_attr_tg_pt_gp_id, 3122 &target_tg_pt_gp_attr_members, 3123 NULL, 3124 }; 3125 3126 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 3127 { 3128 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3129 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3130 3131 core_alua_free_tg_pt_gp(tg_pt_gp); 3132 } 3133 3134 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 3135 .release = target_core_alua_tg_pt_gp_release, 3136 }; 3137 3138 static const struct config_item_type target_core_alua_tg_pt_gp_cit = { 3139 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 3140 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 3141 .ct_owner = THIS_MODULE, 3142 }; 3143 3144 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 3145 3146 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3147 3148 static struct config_group *target_core_alua_create_tg_pt_gp( 3149 struct config_group *group, 3150 const char *name) 3151 { 3152 struct t10_alua *alua = container_of(group, struct t10_alua, 3153 alua_tg_pt_gps_group); 3154 struct t10_alua_tg_pt_gp *tg_pt_gp; 3155 struct config_group *alua_tg_pt_gp_cg = NULL; 3156 struct config_item *alua_tg_pt_gp_ci = NULL; 3157 3158 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0); 3159 if (!tg_pt_gp) 3160 return NULL; 3161 3162 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 3163 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 3164 3165 config_group_init_type_name(alua_tg_pt_gp_cg, name, 3166 &target_core_alua_tg_pt_gp_cit); 3167 3168 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 3169 " Group: alua/tg_pt_gps/%s\n", 3170 config_item_name(alua_tg_pt_gp_ci)); 3171 3172 return alua_tg_pt_gp_cg; 3173 } 3174 3175 static void target_core_alua_drop_tg_pt_gp( 3176 struct config_group *group, 3177 struct config_item *item) 3178 { 3179 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3180 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3181 3182 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 3183 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 3184 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 3185 /* 3186 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 3187 * -> target_core_alua_tg_pt_gp_release(). 3188 */ 3189 config_item_put(item); 3190 } 3191 3192 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 3193 .make_group = &target_core_alua_create_tg_pt_gp, 3194 .drop_item = &target_core_alua_drop_tg_pt_gp, 3195 }; 3196 3197 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL); 3198 3199 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3200 3201 /* Start functions for struct config_item_type target_core_alua_cit */ 3202 3203 /* 3204 * target_core_alua_cit is a ConfigFS group that lives under 3205 * /sys/kernel/config/target/core/alua. There are default groups 3206 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 3207 * target_core_alua_cit in target_core_init_configfs() below. 3208 */ 3209 static const struct config_item_type target_core_alua_cit = { 3210 .ct_item_ops = NULL, 3211 .ct_attrs = NULL, 3212 .ct_owner = THIS_MODULE, 3213 }; 3214 3215 /* End functions for struct config_item_type target_core_alua_cit */ 3216 3217 /* Start functions for struct config_item_type tb_dev_stat_cit */ 3218 3219 static struct config_group *target_core_stat_mkdir( 3220 struct config_group *group, 3221 const char *name) 3222 { 3223 return ERR_PTR(-ENOSYS); 3224 } 3225 3226 static void target_core_stat_rmdir( 3227 struct config_group *group, 3228 struct config_item *item) 3229 { 3230 return; 3231 } 3232 3233 static struct configfs_group_operations target_core_stat_group_ops = { 3234 .make_group = &target_core_stat_mkdir, 3235 .drop_item = &target_core_stat_rmdir, 3236 }; 3237 3238 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL); 3239 3240 /* End functions for struct config_item_type tb_dev_stat_cit */ 3241 3242 /* Start functions for struct config_item_type target_core_hba_cit */ 3243 3244 static struct config_group *target_core_make_subdev( 3245 struct config_group *group, 3246 const char *name) 3247 { 3248 struct t10_alua_tg_pt_gp *tg_pt_gp; 3249 struct config_item *hba_ci = &group->cg_item; 3250 struct se_hba *hba = item_to_hba(hba_ci); 3251 struct target_backend *tb = hba->backend; 3252 struct se_device *dev; 3253 int errno = -ENOMEM, ret; 3254 3255 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 3256 if (ret) 3257 return ERR_PTR(ret); 3258 3259 dev = target_alloc_device(hba, name); 3260 if (!dev) 3261 goto out_unlock; 3262 3263 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit); 3264 3265 config_group_init_type_name(&dev->dev_action_group, "action", 3266 &tb->tb_dev_action_cit); 3267 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group); 3268 3269 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib", 3270 &tb->tb_dev_attrib_cit); 3271 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group); 3272 3273 config_group_init_type_name(&dev->dev_pr_group, "pr", 3274 &tb->tb_dev_pr_cit); 3275 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group); 3276 3277 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn", 3278 &tb->tb_dev_wwn_cit); 3279 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group, 3280 &dev->dev_group); 3281 3282 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group, 3283 "alua", &tb->tb_dev_alua_tg_pt_gps_cit); 3284 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group, 3285 &dev->dev_group); 3286 3287 config_group_init_type_name(&dev->dev_stat_grps.stat_group, 3288 "statistics", &tb->tb_dev_stat_cit); 3289 configfs_add_default_group(&dev->dev_stat_grps.stat_group, 3290 &dev->dev_group); 3291 3292 /* 3293 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 3294 */ 3295 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1); 3296 if (!tg_pt_gp) 3297 goto out_free_device; 3298 dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 3299 3300 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 3301 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 3302 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group, 3303 &dev->t10_alua.alua_tg_pt_gps_group); 3304 3305 /* 3306 * Add core/$HBA/$DEV/statistics/ default groups 3307 */ 3308 target_stat_setup_dev_default_groups(dev); 3309 3310 mutex_unlock(&hba->hba_access_mutex); 3311 return &dev->dev_group; 3312 3313 out_free_device: 3314 target_free_device(dev); 3315 out_unlock: 3316 mutex_unlock(&hba->hba_access_mutex); 3317 return ERR_PTR(errno); 3318 } 3319 3320 static void target_core_drop_subdev( 3321 struct config_group *group, 3322 struct config_item *item) 3323 { 3324 struct config_group *dev_cg = to_config_group(item); 3325 struct se_device *dev = 3326 container_of(dev_cg, struct se_device, dev_group); 3327 struct se_hba *hba; 3328 3329 hba = item_to_hba(&dev->se_hba->hba_group.cg_item); 3330 3331 mutex_lock(&hba->hba_access_mutex); 3332 3333 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group); 3334 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group); 3335 3336 /* 3337 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 3338 * directly from target_core_alua_tg_pt_gp_release(). 3339 */ 3340 dev->t10_alua.default_tg_pt_gp = NULL; 3341 3342 configfs_remove_default_groups(dev_cg); 3343 3344 /* 3345 * se_dev is released from target_core_dev_item_ops->release() 3346 */ 3347 config_item_put(item); 3348 mutex_unlock(&hba->hba_access_mutex); 3349 } 3350 3351 static struct configfs_group_operations target_core_hba_group_ops = { 3352 .make_group = target_core_make_subdev, 3353 .drop_item = target_core_drop_subdev, 3354 }; 3355 3356 3357 static inline struct se_hba *to_hba(struct config_item *item) 3358 { 3359 return container_of(to_config_group(item), struct se_hba, hba_group); 3360 } 3361 3362 static ssize_t target_hba_info_show(struct config_item *item, char *page) 3363 { 3364 struct se_hba *hba = to_hba(item); 3365 3366 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 3367 hba->hba_id, hba->backend->ops->name, 3368 TARGET_CORE_VERSION); 3369 } 3370 3371 static ssize_t target_hba_mode_show(struct config_item *item, char *page) 3372 { 3373 struct se_hba *hba = to_hba(item); 3374 int hba_mode = 0; 3375 3376 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 3377 hba_mode = 1; 3378 3379 return sprintf(page, "%d\n", hba_mode); 3380 } 3381 3382 static ssize_t target_hba_mode_store(struct config_item *item, 3383 const char *page, size_t count) 3384 { 3385 struct se_hba *hba = to_hba(item); 3386 unsigned long mode_flag; 3387 int ret; 3388 3389 if (hba->backend->ops->pmode_enable_hba == NULL) 3390 return -EINVAL; 3391 3392 ret = kstrtoul(page, 0, &mode_flag); 3393 if (ret < 0) { 3394 pr_err("Unable to extract hba mode flag: %d\n", ret); 3395 return ret; 3396 } 3397 3398 if (hba->dev_count) { 3399 pr_err("Unable to set hba_mode with active devices\n"); 3400 return -EINVAL; 3401 } 3402 3403 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag); 3404 if (ret < 0) 3405 return -EINVAL; 3406 if (ret > 0) 3407 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 3408 else if (ret == 0) 3409 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 3410 3411 return count; 3412 } 3413 3414 CONFIGFS_ATTR_RO(target_, hba_info); 3415 CONFIGFS_ATTR(target_, hba_mode); 3416 3417 static void target_core_hba_release(struct config_item *item) 3418 { 3419 struct se_hba *hba = container_of(to_config_group(item), 3420 struct se_hba, hba_group); 3421 core_delete_hba(hba); 3422 } 3423 3424 static struct configfs_attribute *target_core_hba_attrs[] = { 3425 &target_attr_hba_info, 3426 &target_attr_hba_mode, 3427 NULL, 3428 }; 3429 3430 static struct configfs_item_operations target_core_hba_item_ops = { 3431 .release = target_core_hba_release, 3432 }; 3433 3434 static const struct config_item_type target_core_hba_cit = { 3435 .ct_item_ops = &target_core_hba_item_ops, 3436 .ct_group_ops = &target_core_hba_group_ops, 3437 .ct_attrs = target_core_hba_attrs, 3438 .ct_owner = THIS_MODULE, 3439 }; 3440 3441 static struct config_group *target_core_call_addhbatotarget( 3442 struct config_group *group, 3443 const char *name) 3444 { 3445 char *se_plugin_str, *str, *str2; 3446 struct se_hba *hba; 3447 char buf[TARGET_CORE_NAME_MAX_LEN] = { }; 3448 unsigned long plugin_dep_id = 0; 3449 int ret; 3450 3451 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 3452 pr_err("Passed *name strlen(): %d exceeds" 3453 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 3454 TARGET_CORE_NAME_MAX_LEN); 3455 return ERR_PTR(-ENAMETOOLONG); 3456 } 3457 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 3458 3459 str = strstr(buf, "_"); 3460 if (!str) { 3461 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 3462 return ERR_PTR(-EINVAL); 3463 } 3464 se_plugin_str = buf; 3465 /* 3466 * Special case for subsystem plugins that have "_" in their names. 3467 * Namely rd_direct and rd_mcp.. 3468 */ 3469 str2 = strstr(str+1, "_"); 3470 if (str2) { 3471 *str2 = '\0'; /* Terminate for *se_plugin_str */ 3472 str2++; /* Skip to start of plugin dependent ID */ 3473 str = str2; 3474 } else { 3475 *str = '\0'; /* Terminate for *se_plugin_str */ 3476 str++; /* Skip to start of plugin dependent ID */ 3477 } 3478 3479 ret = kstrtoul(str, 0, &plugin_dep_id); 3480 if (ret < 0) { 3481 pr_err("kstrtoul() returned %d for" 3482 " plugin_dep_id\n", ret); 3483 return ERR_PTR(ret); 3484 } 3485 /* 3486 * Load up TCM subsystem plugins if they have not already been loaded. 3487 */ 3488 transport_subsystem_check_init(); 3489 3490 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 3491 if (IS_ERR(hba)) 3492 return ERR_CAST(hba); 3493 3494 config_group_init_type_name(&hba->hba_group, name, 3495 &target_core_hba_cit); 3496 3497 return &hba->hba_group; 3498 } 3499 3500 static void target_core_call_delhbafromtarget( 3501 struct config_group *group, 3502 struct config_item *item) 3503 { 3504 /* 3505 * core_delete_hba() is called from target_core_hba_item_ops->release() 3506 * -> target_core_hba_release() 3507 */ 3508 config_item_put(item); 3509 } 3510 3511 static struct configfs_group_operations target_core_group_ops = { 3512 .make_group = target_core_call_addhbatotarget, 3513 .drop_item = target_core_call_delhbafromtarget, 3514 }; 3515 3516 static const struct config_item_type target_core_cit = { 3517 .ct_item_ops = NULL, 3518 .ct_group_ops = &target_core_group_ops, 3519 .ct_attrs = NULL, 3520 .ct_owner = THIS_MODULE, 3521 }; 3522 3523 /* Stop functions for struct config_item_type target_core_hba_cit */ 3524 3525 void target_setup_backend_cits(struct target_backend *tb) 3526 { 3527 target_core_setup_dev_cit(tb); 3528 target_core_setup_dev_action_cit(tb); 3529 target_core_setup_dev_attrib_cit(tb); 3530 target_core_setup_dev_pr_cit(tb); 3531 target_core_setup_dev_wwn_cit(tb); 3532 target_core_setup_dev_alua_tg_pt_gps_cit(tb); 3533 target_core_setup_dev_stat_cit(tb); 3534 } 3535 3536 static void target_init_dbroot(void) 3537 { 3538 struct file *fp; 3539 3540 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED); 3541 fp = filp_open(db_root_stage, O_RDONLY, 0); 3542 if (IS_ERR(fp)) { 3543 pr_err("db_root: cannot open: %s\n", db_root_stage); 3544 return; 3545 } 3546 if (!S_ISDIR(file_inode(fp)->i_mode)) { 3547 filp_close(fp, NULL); 3548 pr_err("db_root: not a valid directory: %s\n", db_root_stage); 3549 return; 3550 } 3551 filp_close(fp, NULL); 3552 3553 strncpy(db_root, db_root_stage, DB_ROOT_LEN); 3554 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); 3555 } 3556 3557 static int __init target_core_init_configfs(void) 3558 { 3559 struct configfs_subsystem *subsys = &target_core_fabrics; 3560 struct t10_alua_lu_gp *lu_gp; 3561 int ret; 3562 3563 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 3564 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3565 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3566 3567 config_group_init(&subsys->su_group); 3568 mutex_init(&subsys->su_mutex); 3569 3570 ret = init_se_kmem_caches(); 3571 if (ret < 0) 3572 return ret; 3573 /* 3574 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3575 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3576 */ 3577 config_group_init_type_name(&target_core_hbagroup, "core", 3578 &target_core_cit); 3579 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group); 3580 3581 /* 3582 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3583 */ 3584 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit); 3585 configfs_add_default_group(&alua_group, &target_core_hbagroup); 3586 3587 /* 3588 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3589 * groups under /sys/kernel/config/target/core/alua/ 3590 */ 3591 config_group_init_type_name(&alua_lu_gps_group, "lu_gps", 3592 &target_core_alua_lu_gps_cit); 3593 configfs_add_default_group(&alua_lu_gps_group, &alua_group); 3594 3595 /* 3596 * Add core/alua/lu_gps/default_lu_gp 3597 */ 3598 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3599 if (IS_ERR(lu_gp)) { 3600 ret = -ENOMEM; 3601 goto out_global; 3602 } 3603 3604 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3605 &target_core_alua_lu_gp_cit); 3606 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group); 3607 3608 default_lu_gp = lu_gp; 3609 3610 /* 3611 * Register the target_core_mod subsystem with configfs. 3612 */ 3613 ret = configfs_register_subsystem(subsys); 3614 if (ret < 0) { 3615 pr_err("Error %d while registering subsystem %s\n", 3616 ret, subsys->su_group.cg_item.ci_namebuf); 3617 goto out_global; 3618 } 3619 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 3620 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s" 3621 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3622 /* 3623 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3624 */ 3625 ret = rd_module_init(); 3626 if (ret < 0) 3627 goto out; 3628 3629 ret = core_dev_setup_virtual_lun0(); 3630 if (ret < 0) 3631 goto out; 3632 3633 ret = target_xcopy_setup_pt(); 3634 if (ret < 0) 3635 goto out; 3636 3637 target_init_dbroot(); 3638 3639 return 0; 3640 3641 out: 3642 configfs_unregister_subsystem(subsys); 3643 core_dev_release_virtual_lun0(); 3644 rd_module_exit(); 3645 out_global: 3646 if (default_lu_gp) { 3647 core_alua_free_lu_gp(default_lu_gp); 3648 default_lu_gp = NULL; 3649 } 3650 release_se_kmem_caches(); 3651 return ret; 3652 } 3653 3654 static void __exit target_core_exit_configfs(void) 3655 { 3656 configfs_remove_default_groups(&alua_lu_gps_group); 3657 configfs_remove_default_groups(&alua_group); 3658 configfs_remove_default_groups(&target_core_hbagroup); 3659 3660 /* 3661 * We expect subsys->su_group.default_groups to be released 3662 * by configfs subsystem provider logic.. 3663 */ 3664 configfs_unregister_subsystem(&target_core_fabrics); 3665 3666 core_alua_free_lu_gp(default_lu_gp); 3667 default_lu_gp = NULL; 3668 3669 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3670 " Infrastructure\n"); 3671 3672 core_dev_release_virtual_lun0(); 3673 rd_module_exit(); 3674 target_xcopy_release_pt(); 3675 release_se_kmem_caches(); 3676 } 3677 3678 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3679 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3680 MODULE_LICENSE("GPL"); 3681 3682 module_init(target_core_init_configfs); 3683 module_exit(target_core_exit_configfs); 3684