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