1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /******************************************************************************* 3 * Filename: target_core_configfs.c 4 * 5 * This file contains ConfigFS logic for the Generic Target Engine project. 6 * 7 * (c) Copyright 2008-2013 Datera, Inc. 8 * 9 * Nicholas A. Bellinger <nab@kernel.org> 10 * 11 * based on configfs Copyright (C) 2005 Oracle. All rights reserved. 12 * 13 ****************************************************************************/ 14 15 #include <linux/module.h> 16 #include <linux/moduleparam.h> 17 #include <generated/utsrelease.h> 18 #include <linux/utsname.h> 19 #include <linux/init.h> 20 #include <linux/fs.h> 21 #include <linux/namei.h> 22 #include <linux/slab.h> 23 #include <linux/types.h> 24 #include <linux/delay.h> 25 #include <linux/unistd.h> 26 #include <linux/string.h> 27 #include <linux/parser.h> 28 #include <linux/syscalls.h> 29 #include <linux/configfs.h> 30 #include <linux/spinlock.h> 31 32 #include <target/target_core_base.h> 33 #include <target/target_core_backend.h> 34 #include <target/target_core_fabric.h> 35 36 #include "target_core_internal.h" 37 #include "target_core_alua.h" 38 #include "target_core_pr.h" 39 #include "target_core_rd.h" 40 #include "target_core_xcopy.h" 41 42 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \ 43 static void target_core_setup_##_name##_cit(struct target_backend *tb) \ 44 { \ 45 struct config_item_type *cit = &tb->tb_##_name##_cit; \ 46 \ 47 cit->ct_item_ops = _item_ops; \ 48 cit->ct_group_ops = _group_ops; \ 49 cit->ct_attrs = _attrs; \ 50 cit->ct_owner = tb->ops->owner; \ 51 pr_debug("Setup generic %s\n", __stringify(_name)); \ 52 } 53 54 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \ 55 static void target_core_setup_##_name##_cit(struct target_backend *tb) \ 56 { \ 57 struct config_item_type *cit = &tb->tb_##_name##_cit; \ 58 \ 59 cit->ct_item_ops = _item_ops; \ 60 cit->ct_group_ops = _group_ops; \ 61 cit->ct_attrs = tb->ops->tb_##_name##_attrs; \ 62 cit->ct_owner = tb->ops->owner; \ 63 pr_debug("Setup generic %s\n", __stringify(_name)); \ 64 } 65 66 extern struct t10_alua_lu_gp *default_lu_gp; 67 68 static LIST_HEAD(g_tf_list); 69 static DEFINE_MUTEX(g_tf_lock); 70 71 static struct config_group target_core_hbagroup; 72 static struct config_group alua_group; 73 static struct config_group alua_lu_gps_group; 74 75 static inline struct se_hba * 76 item_to_hba(struct config_item *item) 77 { 78 return container_of(to_config_group(item), struct se_hba, hba_group); 79 } 80 81 /* 82 * Attributes for /sys/kernel/config/target/ 83 */ 84 static ssize_t target_core_item_version_show(struct config_item *item, 85 char *page) 86 { 87 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s" 88 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION, 89 utsname()->sysname, utsname()->machine); 90 } 91 92 CONFIGFS_ATTR_RO(target_core_item_, version); 93 94 char db_root[DB_ROOT_LEN] = DB_ROOT_DEFAULT; 95 static char db_root_stage[DB_ROOT_LEN]; 96 97 static ssize_t target_core_item_dbroot_show(struct config_item *item, 98 char *page) 99 { 100 return sprintf(page, "%s\n", db_root); 101 } 102 103 static ssize_t target_core_item_dbroot_store(struct config_item *item, 104 const char *page, size_t count) 105 { 106 ssize_t read_bytes; 107 struct file *fp; 108 109 mutex_lock(&g_tf_lock); 110 if (!list_empty(&g_tf_list)) { 111 mutex_unlock(&g_tf_lock); 112 pr_err("db_root: cannot be changed: target drivers registered"); 113 return -EINVAL; 114 } 115 116 if (count > (DB_ROOT_LEN - 1)) { 117 mutex_unlock(&g_tf_lock); 118 pr_err("db_root: count %d exceeds DB_ROOT_LEN-1: %u\n", 119 (int)count, DB_ROOT_LEN - 1); 120 return -EINVAL; 121 } 122 123 read_bytes = snprintf(db_root_stage, DB_ROOT_LEN, "%s", page); 124 if (!read_bytes) { 125 mutex_unlock(&g_tf_lock); 126 return -EINVAL; 127 } 128 if (db_root_stage[read_bytes - 1] == '\n') 129 db_root_stage[read_bytes - 1] = '\0'; 130 131 /* validate new db root before accepting it */ 132 fp = filp_open(db_root_stage, O_RDONLY, 0); 133 if (IS_ERR(fp)) { 134 mutex_unlock(&g_tf_lock); 135 pr_err("db_root: cannot open: %s\n", db_root_stage); 136 return -EINVAL; 137 } 138 if (!S_ISDIR(file_inode(fp)->i_mode)) { 139 filp_close(fp, NULL); 140 mutex_unlock(&g_tf_lock); 141 pr_err("db_root: not a directory: %s\n", db_root_stage); 142 return -EINVAL; 143 } 144 filp_close(fp, NULL); 145 146 strncpy(db_root, db_root_stage, read_bytes); 147 148 mutex_unlock(&g_tf_lock); 149 150 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); 151 152 return read_bytes; 153 } 154 155 CONFIGFS_ATTR(target_core_item_, dbroot); 156 157 static struct target_fabric_configfs *target_core_get_fabric( 158 const char *name) 159 { 160 struct target_fabric_configfs *tf; 161 162 if (!name) 163 return NULL; 164 165 mutex_lock(&g_tf_lock); 166 list_for_each_entry(tf, &g_tf_list, tf_list) { 167 const char *cmp_name = tf->tf_ops->fabric_alias; 168 if (!cmp_name) 169 cmp_name = tf->tf_ops->fabric_name; 170 if (!strcmp(cmp_name, name)) { 171 atomic_inc(&tf->tf_access_cnt); 172 mutex_unlock(&g_tf_lock); 173 return tf; 174 } 175 } 176 mutex_unlock(&g_tf_lock); 177 178 return NULL; 179 } 180 181 /* 182 * Called from struct target_core_group_ops->make_group() 183 */ 184 static struct config_group *target_core_register_fabric( 185 struct config_group *group, 186 const char *name) 187 { 188 struct target_fabric_configfs *tf; 189 int ret; 190 191 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:" 192 " %s\n", group, name); 193 194 tf = target_core_get_fabric(name); 195 if (!tf) { 196 pr_debug("target_core_register_fabric() trying autoload for %s\n", 197 name); 198 199 /* 200 * Below are some hardcoded request_module() calls to automatically 201 * local fabric modules when the following is called: 202 * 203 * mkdir -p /sys/kernel/config/target/$MODULE_NAME 204 * 205 * Note that this does not limit which TCM fabric module can be 206 * registered, but simply provids auto loading logic for modules with 207 * mkdir(2) system calls with known TCM fabric modules. 208 */ 209 210 if (!strncmp(name, "iscsi", 5)) { 211 /* 212 * Automatically load the LIO Target fabric module when the 213 * following is called: 214 * 215 * mkdir -p $CONFIGFS/target/iscsi 216 */ 217 ret = request_module("iscsi_target_mod"); 218 if (ret < 0) { 219 pr_debug("request_module() failed for" 220 " iscsi_target_mod.ko: %d\n", ret); 221 return ERR_PTR(-EINVAL); 222 } 223 } else if (!strncmp(name, "loopback", 8)) { 224 /* 225 * Automatically load the tcm_loop fabric module when the 226 * following is called: 227 * 228 * mkdir -p $CONFIGFS/target/loopback 229 */ 230 ret = request_module("tcm_loop"); 231 if (ret < 0) { 232 pr_debug("request_module() failed for" 233 " tcm_loop.ko: %d\n", ret); 234 return ERR_PTR(-EINVAL); 235 } 236 } 237 238 tf = target_core_get_fabric(name); 239 } 240 241 if (!tf) { 242 pr_debug("target_core_get_fabric() failed for %s\n", 243 name); 244 return ERR_PTR(-EINVAL); 245 } 246 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:" 247 " %s\n", tf->tf_ops->fabric_name); 248 /* 249 * On a successful target_core_get_fabric() look, the returned 250 * struct target_fabric_configfs *tf will contain a usage reference. 251 */ 252 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n", 253 &tf->tf_wwn_cit); 254 255 config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit); 256 257 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth", 258 &tf->tf_discovery_cit); 259 configfs_add_default_group(&tf->tf_disc_group, &tf->tf_group); 260 261 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric: %s\n", 262 config_item_name(&tf->tf_group.cg_item)); 263 return &tf->tf_group; 264 } 265 266 /* 267 * Called from struct target_core_group_ops->drop_item() 268 */ 269 static void target_core_deregister_fabric( 270 struct config_group *group, 271 struct config_item *item) 272 { 273 struct target_fabric_configfs *tf = container_of( 274 to_config_group(item), struct target_fabric_configfs, tf_group); 275 276 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in" 277 " tf list\n", config_item_name(item)); 278 279 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:" 280 " %s\n", tf->tf_ops->fabric_name); 281 atomic_dec(&tf->tf_access_cnt); 282 283 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci" 284 " %s\n", config_item_name(item)); 285 286 configfs_remove_default_groups(&tf->tf_group); 287 config_item_put(item); 288 } 289 290 static struct configfs_group_operations target_core_fabric_group_ops = { 291 .make_group = &target_core_register_fabric, 292 .drop_item = &target_core_deregister_fabric, 293 }; 294 295 /* 296 * All item attributes appearing in /sys/kernel/target/ appear here. 297 */ 298 static struct configfs_attribute *target_core_fabric_item_attrs[] = { 299 &target_core_item_attr_version, 300 &target_core_item_attr_dbroot, 301 NULL, 302 }; 303 304 /* 305 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/ 306 */ 307 static const struct config_item_type target_core_fabrics_item = { 308 .ct_group_ops = &target_core_fabric_group_ops, 309 .ct_attrs = target_core_fabric_item_attrs, 310 .ct_owner = THIS_MODULE, 311 }; 312 313 static struct configfs_subsystem target_core_fabrics = { 314 .su_group = { 315 .cg_item = { 316 .ci_namebuf = "target", 317 .ci_type = &target_core_fabrics_item, 318 }, 319 }, 320 }; 321 322 int target_depend_item(struct config_item *item) 323 { 324 return configfs_depend_item(&target_core_fabrics, item); 325 } 326 EXPORT_SYMBOL(target_depend_item); 327 328 void target_undepend_item(struct config_item *item) 329 { 330 return configfs_undepend_item(item); 331 } 332 EXPORT_SYMBOL(target_undepend_item); 333 334 /*############################################################################## 335 // Start functions called by external Target Fabrics Modules 336 //############################################################################*/ 337 338 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo) 339 { 340 if (tfo->fabric_alias) { 341 if (strlen(tfo->fabric_alias) >= TARGET_FABRIC_NAME_SIZE) { 342 pr_err("Passed alias: %s exceeds " 343 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_alias); 344 return -EINVAL; 345 } 346 } 347 if (!tfo->fabric_name) { 348 pr_err("Missing tfo->fabric_name\n"); 349 return -EINVAL; 350 } 351 if (strlen(tfo->fabric_name) >= TARGET_FABRIC_NAME_SIZE) { 352 pr_err("Passed name: %s exceeds " 353 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_name); 354 return -EINVAL; 355 } 356 if (!tfo->tpg_get_wwn) { 357 pr_err("Missing tfo->tpg_get_wwn()\n"); 358 return -EINVAL; 359 } 360 if (!tfo->tpg_get_tag) { 361 pr_err("Missing tfo->tpg_get_tag()\n"); 362 return -EINVAL; 363 } 364 if (!tfo->tpg_check_demo_mode) { 365 pr_err("Missing tfo->tpg_check_demo_mode()\n"); 366 return -EINVAL; 367 } 368 if (!tfo->tpg_check_demo_mode_cache) { 369 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n"); 370 return -EINVAL; 371 } 372 if (!tfo->tpg_check_demo_mode_write_protect) { 373 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n"); 374 return -EINVAL; 375 } 376 if (!tfo->tpg_check_prod_mode_write_protect) { 377 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n"); 378 return -EINVAL; 379 } 380 if (!tfo->tpg_get_inst_index) { 381 pr_err("Missing tfo->tpg_get_inst_index()\n"); 382 return -EINVAL; 383 } 384 if (!tfo->release_cmd) { 385 pr_err("Missing tfo->release_cmd()\n"); 386 return -EINVAL; 387 } 388 if (!tfo->sess_get_index) { 389 pr_err("Missing tfo->sess_get_index()\n"); 390 return -EINVAL; 391 } 392 if (!tfo->write_pending) { 393 pr_err("Missing tfo->write_pending()\n"); 394 return -EINVAL; 395 } 396 if (!tfo->set_default_node_attributes) { 397 pr_err("Missing tfo->set_default_node_attributes()\n"); 398 return -EINVAL; 399 } 400 if (!tfo->get_cmd_state) { 401 pr_err("Missing tfo->get_cmd_state()\n"); 402 return -EINVAL; 403 } 404 if (!tfo->queue_data_in) { 405 pr_err("Missing tfo->queue_data_in()\n"); 406 return -EINVAL; 407 } 408 if (!tfo->queue_status) { 409 pr_err("Missing tfo->queue_status()\n"); 410 return -EINVAL; 411 } 412 if (!tfo->queue_tm_rsp) { 413 pr_err("Missing tfo->queue_tm_rsp()\n"); 414 return -EINVAL; 415 } 416 if (!tfo->aborted_task) { 417 pr_err("Missing tfo->aborted_task()\n"); 418 return -EINVAL; 419 } 420 if (!tfo->check_stop_free) { 421 pr_err("Missing tfo->check_stop_free()\n"); 422 return -EINVAL; 423 } 424 /* 425 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn() 426 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in 427 * target_core_fabric_configfs.c WWN+TPG group context code. 428 */ 429 if (!tfo->fabric_make_wwn) { 430 pr_err("Missing tfo->fabric_make_wwn()\n"); 431 return -EINVAL; 432 } 433 if (!tfo->fabric_drop_wwn) { 434 pr_err("Missing tfo->fabric_drop_wwn()\n"); 435 return -EINVAL; 436 } 437 if (!tfo->fabric_make_tpg) { 438 pr_err("Missing tfo->fabric_make_tpg()\n"); 439 return -EINVAL; 440 } 441 if (!tfo->fabric_drop_tpg) { 442 pr_err("Missing tfo->fabric_drop_tpg()\n"); 443 return -EINVAL; 444 } 445 446 return 0; 447 } 448 449 int target_register_template(const struct target_core_fabric_ops *fo) 450 { 451 struct target_fabric_configfs *tf; 452 int ret; 453 454 ret = target_fabric_tf_ops_check(fo); 455 if (ret) 456 return ret; 457 458 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL); 459 if (!tf) { 460 pr_err("%s: could not allocate memory!\n", __func__); 461 return -ENOMEM; 462 } 463 464 INIT_LIST_HEAD(&tf->tf_list); 465 atomic_set(&tf->tf_access_cnt, 0); 466 tf->tf_ops = fo; 467 target_fabric_setup_cits(tf); 468 469 mutex_lock(&g_tf_lock); 470 list_add_tail(&tf->tf_list, &g_tf_list); 471 mutex_unlock(&g_tf_lock); 472 473 return 0; 474 } 475 EXPORT_SYMBOL(target_register_template); 476 477 void target_unregister_template(const struct target_core_fabric_ops *fo) 478 { 479 struct target_fabric_configfs *t; 480 481 mutex_lock(&g_tf_lock); 482 list_for_each_entry(t, &g_tf_list, tf_list) { 483 if (!strcmp(t->tf_ops->fabric_name, fo->fabric_name)) { 484 BUG_ON(atomic_read(&t->tf_access_cnt)); 485 list_del(&t->tf_list); 486 mutex_unlock(&g_tf_lock); 487 /* 488 * Wait for any outstanding fabric se_deve_entry->rcu_head 489 * callbacks to complete post kfree_rcu(), before allowing 490 * fabric driver unload of TFO->module to proceed. 491 */ 492 rcu_barrier(); 493 kfree(t->tf_tpg_base_cit.ct_attrs); 494 kfree(t); 495 return; 496 } 497 } 498 mutex_unlock(&g_tf_lock); 499 } 500 EXPORT_SYMBOL(target_unregister_template); 501 502 /*############################################################################## 503 // Stop functions called by external Target Fabrics Modules 504 //############################################################################*/ 505 506 static inline struct se_dev_attrib *to_attrib(struct config_item *item) 507 { 508 return container_of(to_config_group(item), struct se_dev_attrib, 509 da_group); 510 } 511 512 /* Start functions for struct config_item_type tb_dev_attrib_cit */ 513 #define DEF_CONFIGFS_ATTRIB_SHOW(_name) \ 514 static ssize_t _name##_show(struct config_item *item, char *page) \ 515 { \ 516 return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \ 517 } 518 519 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias); 520 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo); 521 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write); 522 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read); 523 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache); 524 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl); 525 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas); 526 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu); 527 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws); 528 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw); 529 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc); 530 DEF_CONFIGFS_ATTRIB_SHOW(emulate_pr); 531 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type); 532 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type); 533 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify); 534 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids); 535 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot); 536 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord); 537 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl); 538 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size); 539 DEF_CONFIGFS_ATTRIB_SHOW(block_size); 540 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors); 541 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors); 542 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth); 543 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth); 544 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count); 545 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count); 546 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity); 547 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment); 548 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data); 549 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len); 550 551 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \ 552 static ssize_t _name##_store(struct config_item *item, const char *page,\ 553 size_t count) \ 554 { \ 555 struct se_dev_attrib *da = to_attrib(item); \ 556 u32 val; \ 557 int ret; \ 558 \ 559 ret = kstrtou32(page, 0, &val); \ 560 if (ret < 0) \ 561 return ret; \ 562 da->_name = val; \ 563 return count; \ 564 } 565 566 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count); 567 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count); 568 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity); 569 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment); 570 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len); 571 572 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \ 573 static ssize_t _name##_store(struct config_item *item, const char *page, \ 574 size_t count) \ 575 { \ 576 struct se_dev_attrib *da = to_attrib(item); \ 577 bool flag; \ 578 int ret; \ 579 \ 580 ret = strtobool(page, &flag); \ 581 if (ret < 0) \ 582 return ret; \ 583 da->_name = flag; \ 584 return count; \ 585 } 586 587 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write); 588 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw); 589 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc); 590 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr); 591 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids); 592 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot); 593 594 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \ 595 static ssize_t _name##_store(struct config_item *item, const char *page,\ 596 size_t count) \ 597 { \ 598 printk_once(KERN_WARNING \ 599 "ignoring deprecated %s attribute\n", \ 600 __stringify(_name)); \ 601 return count; \ 602 } 603 604 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo); 605 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read); 606 607 static void dev_set_t10_wwn_model_alias(struct se_device *dev) 608 { 609 const char *configname; 610 611 configname = config_item_name(&dev->dev_group.cg_item); 612 if (strlen(configname) >= INQUIRY_MODEL_LEN) { 613 pr_warn("dev[%p]: Backstore name '%s' is too long for " 614 "INQUIRY_MODEL, truncating to 15 characters\n", dev, 615 configname); 616 } 617 /* 618 * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1) 619 * here without potentially breaking existing setups, so continue to 620 * truncate one byte shorter than what can be carried in INQUIRY. 621 */ 622 strlcpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN); 623 } 624 625 static ssize_t emulate_model_alias_store(struct config_item *item, 626 const char *page, size_t count) 627 { 628 struct se_dev_attrib *da = to_attrib(item); 629 struct se_device *dev = da->da_dev; 630 bool flag; 631 int ret; 632 633 if (dev->export_count) { 634 pr_err("dev[%p]: Unable to change model alias" 635 " while export_count is %d\n", 636 dev, dev->export_count); 637 return -EINVAL; 638 } 639 640 ret = strtobool(page, &flag); 641 if (ret < 0) 642 return ret; 643 644 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); 645 if (flag) { 646 dev_set_t10_wwn_model_alias(dev); 647 } else { 648 strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod, 649 sizeof(dev->t10_wwn.model)); 650 } 651 da->emulate_model_alias = flag; 652 return count; 653 } 654 655 static ssize_t emulate_write_cache_store(struct config_item *item, 656 const char *page, size_t count) 657 { 658 struct se_dev_attrib *da = to_attrib(item); 659 bool flag; 660 int ret; 661 662 ret = strtobool(page, &flag); 663 if (ret < 0) 664 return ret; 665 666 if (flag && da->da_dev->transport->get_write_cache) { 667 pr_err("emulate_write_cache not supported for this device\n"); 668 return -EINVAL; 669 } 670 671 da->emulate_write_cache = flag; 672 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 673 da->da_dev, flag); 674 return count; 675 } 676 677 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item, 678 const char *page, size_t count) 679 { 680 struct se_dev_attrib *da = to_attrib(item); 681 u32 val; 682 int ret; 683 684 ret = kstrtou32(page, 0, &val); 685 if (ret < 0) 686 return ret; 687 688 if (val != TARGET_UA_INTLCK_CTRL_CLEAR 689 && val != TARGET_UA_INTLCK_CTRL_NO_CLEAR 690 && val != TARGET_UA_INTLCK_CTRL_ESTABLISH_UA) { 691 pr_err("Illegal value %d\n", val); 692 return -EINVAL; 693 } 694 695 if (da->da_dev->export_count) { 696 pr_err("dev[%p]: Unable to change SE Device" 697 " UA_INTRLCK_CTRL while export_count is %d\n", 698 da->da_dev, da->da_dev->export_count); 699 return -EINVAL; 700 } 701 da->emulate_ua_intlck_ctrl = val; 702 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 703 da->da_dev, val); 704 return count; 705 } 706 707 static ssize_t emulate_tas_store(struct config_item *item, 708 const char *page, size_t count) 709 { 710 struct se_dev_attrib *da = to_attrib(item); 711 bool flag; 712 int ret; 713 714 ret = strtobool(page, &flag); 715 if (ret < 0) 716 return ret; 717 718 if (da->da_dev->export_count) { 719 pr_err("dev[%p]: Unable to change SE Device TAS while" 720 " export_count is %d\n", 721 da->da_dev, da->da_dev->export_count); 722 return -EINVAL; 723 } 724 da->emulate_tas = flag; 725 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 726 da->da_dev, flag ? "Enabled" : "Disabled"); 727 728 return count; 729 } 730 731 static ssize_t emulate_tpu_store(struct config_item *item, 732 const char *page, size_t count) 733 { 734 struct se_dev_attrib *da = to_attrib(item); 735 bool flag; 736 int ret; 737 738 ret = strtobool(page, &flag); 739 if (ret < 0) 740 return ret; 741 742 /* 743 * We expect this value to be non-zero when generic Block Layer 744 * Discard supported is detected iblock_create_virtdevice(). 745 */ 746 if (flag && !da->max_unmap_block_desc_count) { 747 pr_err("Generic Block Discard not supported\n"); 748 return -ENOSYS; 749 } 750 751 da->emulate_tpu = flag; 752 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 753 da->da_dev, flag); 754 return count; 755 } 756 757 static ssize_t emulate_tpws_store(struct config_item *item, 758 const char *page, size_t count) 759 { 760 struct se_dev_attrib *da = to_attrib(item); 761 bool flag; 762 int ret; 763 764 ret = strtobool(page, &flag); 765 if (ret < 0) 766 return ret; 767 768 /* 769 * We expect this value to be non-zero when generic Block Layer 770 * Discard supported is detected iblock_create_virtdevice(). 771 */ 772 if (flag && !da->max_unmap_block_desc_count) { 773 pr_err("Generic Block Discard not supported\n"); 774 return -ENOSYS; 775 } 776 777 da->emulate_tpws = flag; 778 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 779 da->da_dev, flag); 780 return count; 781 } 782 783 static ssize_t pi_prot_type_store(struct config_item *item, 784 const char *page, size_t count) 785 { 786 struct se_dev_attrib *da = to_attrib(item); 787 int old_prot = da->pi_prot_type, ret; 788 struct se_device *dev = da->da_dev; 789 u32 flag; 790 791 ret = kstrtou32(page, 0, &flag); 792 if (ret < 0) 793 return ret; 794 795 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) { 796 pr_err("Illegal value %d for pi_prot_type\n", flag); 797 return -EINVAL; 798 } 799 if (flag == 2) { 800 pr_err("DIF TYPE2 protection currently not supported\n"); 801 return -ENOSYS; 802 } 803 if (da->hw_pi_prot_type) { 804 pr_warn("DIF protection enabled on underlying hardware," 805 " ignoring\n"); 806 return count; 807 } 808 if (!dev->transport->init_prot || !dev->transport->free_prot) { 809 /* 0 is only allowed value for non-supporting backends */ 810 if (flag == 0) 811 return count; 812 813 pr_err("DIF protection not supported by backend: %s\n", 814 dev->transport->name); 815 return -ENOSYS; 816 } 817 if (!target_dev_configured(dev)) { 818 pr_err("DIF protection requires device to be configured\n"); 819 return -ENODEV; 820 } 821 if (dev->export_count) { 822 pr_err("dev[%p]: Unable to change SE Device PROT type while" 823 " export_count is %d\n", dev, dev->export_count); 824 return -EINVAL; 825 } 826 827 da->pi_prot_type = flag; 828 829 if (flag && !old_prot) { 830 ret = dev->transport->init_prot(dev); 831 if (ret) { 832 da->pi_prot_type = old_prot; 833 da->pi_prot_verify = (bool) da->pi_prot_type; 834 return ret; 835 } 836 837 } else if (!flag && old_prot) { 838 dev->transport->free_prot(dev); 839 } 840 841 da->pi_prot_verify = (bool) da->pi_prot_type; 842 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag); 843 return count; 844 } 845 846 /* always zero, but attr needs to remain RW to avoid userspace breakage */ 847 static ssize_t pi_prot_format_show(struct config_item *item, char *page) 848 { 849 return snprintf(page, PAGE_SIZE, "0\n"); 850 } 851 852 static ssize_t pi_prot_format_store(struct config_item *item, 853 const char *page, size_t count) 854 { 855 struct se_dev_attrib *da = to_attrib(item); 856 struct se_device *dev = da->da_dev; 857 bool flag; 858 int ret; 859 860 ret = strtobool(page, &flag); 861 if (ret < 0) 862 return ret; 863 864 if (!flag) 865 return count; 866 867 if (!dev->transport->format_prot) { 868 pr_err("DIF protection format not supported by backend %s\n", 869 dev->transport->name); 870 return -ENOSYS; 871 } 872 if (!target_dev_configured(dev)) { 873 pr_err("DIF protection format requires device to be configured\n"); 874 return -ENODEV; 875 } 876 if (dev->export_count) { 877 pr_err("dev[%p]: Unable to format SE Device PROT type while" 878 " export_count is %d\n", dev, dev->export_count); 879 return -EINVAL; 880 } 881 882 ret = dev->transport->format_prot(dev); 883 if (ret) 884 return ret; 885 886 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev); 887 return count; 888 } 889 890 static ssize_t pi_prot_verify_store(struct config_item *item, 891 const char *page, size_t count) 892 { 893 struct se_dev_attrib *da = to_attrib(item); 894 bool flag; 895 int ret; 896 897 ret = strtobool(page, &flag); 898 if (ret < 0) 899 return ret; 900 901 if (!flag) { 902 da->pi_prot_verify = flag; 903 return count; 904 } 905 if (da->hw_pi_prot_type) { 906 pr_warn("DIF protection enabled on underlying hardware," 907 " ignoring\n"); 908 return count; 909 } 910 if (!da->pi_prot_type) { 911 pr_warn("DIF protection not supported by backend, ignoring\n"); 912 return count; 913 } 914 da->pi_prot_verify = flag; 915 916 return count; 917 } 918 919 static ssize_t force_pr_aptpl_store(struct config_item *item, 920 const char *page, size_t count) 921 { 922 struct se_dev_attrib *da = to_attrib(item); 923 bool flag; 924 int ret; 925 926 ret = strtobool(page, &flag); 927 if (ret < 0) 928 return ret; 929 if (da->da_dev->export_count) { 930 pr_err("dev[%p]: Unable to set force_pr_aptpl while" 931 " export_count is %d\n", 932 da->da_dev, da->da_dev->export_count); 933 return -EINVAL; 934 } 935 936 da->force_pr_aptpl = flag; 937 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag); 938 return count; 939 } 940 941 static ssize_t emulate_rest_reord_store(struct config_item *item, 942 const char *page, size_t count) 943 { 944 struct se_dev_attrib *da = to_attrib(item); 945 bool flag; 946 int ret; 947 948 ret = strtobool(page, &flag); 949 if (ret < 0) 950 return ret; 951 952 if (flag != 0) { 953 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted" 954 " reordering not implemented\n", da->da_dev); 955 return -ENOSYS; 956 } 957 da->emulate_rest_reord = flag; 958 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", 959 da->da_dev, flag); 960 return count; 961 } 962 963 static ssize_t unmap_zeroes_data_store(struct config_item *item, 964 const char *page, size_t count) 965 { 966 struct se_dev_attrib *da = to_attrib(item); 967 bool flag; 968 int ret; 969 970 ret = strtobool(page, &flag); 971 if (ret < 0) 972 return ret; 973 974 if (da->da_dev->export_count) { 975 pr_err("dev[%p]: Unable to change SE Device" 976 " unmap_zeroes_data while export_count is %d\n", 977 da->da_dev, da->da_dev->export_count); 978 return -EINVAL; 979 } 980 /* 981 * We expect this value to be non-zero when generic Block Layer 982 * Discard supported is detected iblock_configure_device(). 983 */ 984 if (flag && !da->max_unmap_block_desc_count) { 985 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set" 986 " because max_unmap_block_desc_count is zero\n", 987 da->da_dev); 988 return -ENOSYS; 989 } 990 da->unmap_zeroes_data = flag; 991 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n", 992 da->da_dev, flag); 993 return count; 994 } 995 996 /* 997 * Note, this can only be called on unexported SE Device Object. 998 */ 999 static ssize_t queue_depth_store(struct config_item *item, 1000 const char *page, size_t count) 1001 { 1002 struct se_dev_attrib *da = to_attrib(item); 1003 struct se_device *dev = da->da_dev; 1004 u32 val; 1005 int ret; 1006 1007 ret = kstrtou32(page, 0, &val); 1008 if (ret < 0) 1009 return ret; 1010 1011 if (dev->export_count) { 1012 pr_err("dev[%p]: Unable to change SE Device TCQ while" 1013 " export_count is %d\n", 1014 dev, dev->export_count); 1015 return -EINVAL; 1016 } 1017 if (!val) { 1018 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev); 1019 return -EINVAL; 1020 } 1021 1022 if (val > dev->dev_attrib.queue_depth) { 1023 if (val > dev->dev_attrib.hw_queue_depth) { 1024 pr_err("dev[%p]: Passed queue_depth:" 1025 " %u exceeds TCM/SE_Device MAX" 1026 " TCQ: %u\n", dev, val, 1027 dev->dev_attrib.hw_queue_depth); 1028 return -EINVAL; 1029 } 1030 } 1031 da->queue_depth = dev->queue_depth = val; 1032 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val); 1033 return count; 1034 } 1035 1036 static ssize_t optimal_sectors_store(struct config_item *item, 1037 const char *page, size_t count) 1038 { 1039 struct se_dev_attrib *da = to_attrib(item); 1040 u32 val; 1041 int ret; 1042 1043 ret = kstrtou32(page, 0, &val); 1044 if (ret < 0) 1045 return ret; 1046 1047 if (da->da_dev->export_count) { 1048 pr_err("dev[%p]: Unable to change SE Device" 1049 " optimal_sectors while export_count is %d\n", 1050 da->da_dev, da->da_dev->export_count); 1051 return -EINVAL; 1052 } 1053 if (val > da->hw_max_sectors) { 1054 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1055 " greater than hw_max_sectors: %u\n", 1056 da->da_dev, val, da->hw_max_sectors); 1057 return -EINVAL; 1058 } 1059 1060 da->optimal_sectors = val; 1061 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1062 da->da_dev, val); 1063 return count; 1064 } 1065 1066 static ssize_t block_size_store(struct config_item *item, 1067 const char *page, size_t count) 1068 { 1069 struct se_dev_attrib *da = to_attrib(item); 1070 u32 val; 1071 int ret; 1072 1073 ret = kstrtou32(page, 0, &val); 1074 if (ret < 0) 1075 return ret; 1076 1077 if (da->da_dev->export_count) { 1078 pr_err("dev[%p]: Unable to change SE Device block_size" 1079 " while export_count is %d\n", 1080 da->da_dev, da->da_dev->export_count); 1081 return -EINVAL; 1082 } 1083 1084 if (val != 512 && val != 1024 && val != 2048 && val != 4096) { 1085 pr_err("dev[%p]: Illegal value for block_device: %u" 1086 " for SE device, must be 512, 1024, 2048 or 4096\n", 1087 da->da_dev, val); 1088 return -EINVAL; 1089 } 1090 1091 da->block_size = val; 1092 if (da->max_bytes_per_io) 1093 da->hw_max_sectors = da->max_bytes_per_io / val; 1094 1095 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1096 da->da_dev, val); 1097 return count; 1098 } 1099 1100 static ssize_t alua_support_show(struct config_item *item, char *page) 1101 { 1102 struct se_dev_attrib *da = to_attrib(item); 1103 u8 flags = da->da_dev->transport_flags; 1104 1105 return snprintf(page, PAGE_SIZE, "%d\n", 1106 flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1); 1107 } 1108 1109 static ssize_t alua_support_store(struct config_item *item, 1110 const char *page, size_t count) 1111 { 1112 struct se_dev_attrib *da = to_attrib(item); 1113 struct se_device *dev = da->da_dev; 1114 bool flag, oldflag; 1115 int ret; 1116 1117 ret = strtobool(page, &flag); 1118 if (ret < 0) 1119 return ret; 1120 1121 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA); 1122 if (flag == oldflag) 1123 return count; 1124 1125 if (!(dev->transport->transport_flags_changeable & 1126 TRANSPORT_FLAG_PASSTHROUGH_ALUA)) { 1127 pr_err("dev[%p]: Unable to change SE Device alua_support:" 1128 " alua_support has fixed value\n", dev); 1129 return -ENOSYS; 1130 } 1131 1132 if (flag) 1133 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_ALUA; 1134 else 1135 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_ALUA; 1136 return count; 1137 } 1138 1139 static ssize_t pgr_support_show(struct config_item *item, char *page) 1140 { 1141 struct se_dev_attrib *da = to_attrib(item); 1142 u8 flags = da->da_dev->transport_flags; 1143 1144 return snprintf(page, PAGE_SIZE, "%d\n", 1145 flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1); 1146 } 1147 1148 static ssize_t pgr_support_store(struct config_item *item, 1149 const char *page, size_t count) 1150 { 1151 struct se_dev_attrib *da = to_attrib(item); 1152 struct se_device *dev = da->da_dev; 1153 bool flag, oldflag; 1154 int ret; 1155 1156 ret = strtobool(page, &flag); 1157 if (ret < 0) 1158 return ret; 1159 1160 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR); 1161 if (flag == oldflag) 1162 return count; 1163 1164 if (!(dev->transport->transport_flags_changeable & 1165 TRANSPORT_FLAG_PASSTHROUGH_PGR)) { 1166 pr_err("dev[%p]: Unable to change SE Device pgr_support:" 1167 " pgr_support has fixed value\n", dev); 1168 return -ENOSYS; 1169 } 1170 1171 if (flag) 1172 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_PGR; 1173 else 1174 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_PGR; 1175 return count; 1176 } 1177 1178 CONFIGFS_ATTR(, emulate_model_alias); 1179 CONFIGFS_ATTR(, emulate_dpo); 1180 CONFIGFS_ATTR(, emulate_fua_write); 1181 CONFIGFS_ATTR(, emulate_fua_read); 1182 CONFIGFS_ATTR(, emulate_write_cache); 1183 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl); 1184 CONFIGFS_ATTR(, emulate_tas); 1185 CONFIGFS_ATTR(, emulate_tpu); 1186 CONFIGFS_ATTR(, emulate_tpws); 1187 CONFIGFS_ATTR(, emulate_caw); 1188 CONFIGFS_ATTR(, emulate_3pc); 1189 CONFIGFS_ATTR(, emulate_pr); 1190 CONFIGFS_ATTR(, pi_prot_type); 1191 CONFIGFS_ATTR_RO(, hw_pi_prot_type); 1192 CONFIGFS_ATTR(, pi_prot_format); 1193 CONFIGFS_ATTR(, pi_prot_verify); 1194 CONFIGFS_ATTR(, enforce_pr_isids); 1195 CONFIGFS_ATTR(, is_nonrot); 1196 CONFIGFS_ATTR(, emulate_rest_reord); 1197 CONFIGFS_ATTR(, force_pr_aptpl); 1198 CONFIGFS_ATTR_RO(, hw_block_size); 1199 CONFIGFS_ATTR(, block_size); 1200 CONFIGFS_ATTR_RO(, hw_max_sectors); 1201 CONFIGFS_ATTR(, optimal_sectors); 1202 CONFIGFS_ATTR_RO(, hw_queue_depth); 1203 CONFIGFS_ATTR(, queue_depth); 1204 CONFIGFS_ATTR(, max_unmap_lba_count); 1205 CONFIGFS_ATTR(, max_unmap_block_desc_count); 1206 CONFIGFS_ATTR(, unmap_granularity); 1207 CONFIGFS_ATTR(, unmap_granularity_alignment); 1208 CONFIGFS_ATTR(, unmap_zeroes_data); 1209 CONFIGFS_ATTR(, max_write_same_len); 1210 CONFIGFS_ATTR(, alua_support); 1211 CONFIGFS_ATTR(, pgr_support); 1212 1213 /* 1214 * dev_attrib attributes for devices using the target core SBC/SPC 1215 * interpreter. Any backend using spc_parse_cdb should be using 1216 * these. 1217 */ 1218 struct configfs_attribute *sbc_attrib_attrs[] = { 1219 &attr_emulate_model_alias, 1220 &attr_emulate_dpo, 1221 &attr_emulate_fua_write, 1222 &attr_emulate_fua_read, 1223 &attr_emulate_write_cache, 1224 &attr_emulate_ua_intlck_ctrl, 1225 &attr_emulate_tas, 1226 &attr_emulate_tpu, 1227 &attr_emulate_tpws, 1228 &attr_emulate_caw, 1229 &attr_emulate_3pc, 1230 &attr_emulate_pr, 1231 &attr_pi_prot_type, 1232 &attr_hw_pi_prot_type, 1233 &attr_pi_prot_format, 1234 &attr_pi_prot_verify, 1235 &attr_enforce_pr_isids, 1236 &attr_is_nonrot, 1237 &attr_emulate_rest_reord, 1238 &attr_force_pr_aptpl, 1239 &attr_hw_block_size, 1240 &attr_block_size, 1241 &attr_hw_max_sectors, 1242 &attr_optimal_sectors, 1243 &attr_hw_queue_depth, 1244 &attr_queue_depth, 1245 &attr_max_unmap_lba_count, 1246 &attr_max_unmap_block_desc_count, 1247 &attr_unmap_granularity, 1248 &attr_unmap_granularity_alignment, 1249 &attr_unmap_zeroes_data, 1250 &attr_max_write_same_len, 1251 &attr_alua_support, 1252 &attr_pgr_support, 1253 NULL, 1254 }; 1255 EXPORT_SYMBOL(sbc_attrib_attrs); 1256 1257 /* 1258 * Minimal dev_attrib attributes for devices passing through CDBs. 1259 * In this case we only provide a few read-only attributes for 1260 * backwards compatibility. 1261 */ 1262 struct configfs_attribute *passthrough_attrib_attrs[] = { 1263 &attr_hw_pi_prot_type, 1264 &attr_hw_block_size, 1265 &attr_hw_max_sectors, 1266 &attr_hw_queue_depth, 1267 &attr_emulate_pr, 1268 &attr_alua_support, 1269 &attr_pgr_support, 1270 NULL, 1271 }; 1272 EXPORT_SYMBOL(passthrough_attrib_attrs); 1273 1274 /* 1275 * pr related dev_attrib attributes for devices passing through CDBs, 1276 * but allowing in core pr emulation. 1277 */ 1278 struct configfs_attribute *passthrough_pr_attrib_attrs[] = { 1279 &attr_enforce_pr_isids, 1280 &attr_force_pr_aptpl, 1281 NULL, 1282 }; 1283 EXPORT_SYMBOL(passthrough_pr_attrib_attrs); 1284 1285 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL); 1286 TB_CIT_SETUP_DRV(dev_action, NULL, NULL); 1287 1288 /* End functions for struct config_item_type tb_dev_attrib_cit */ 1289 1290 /* Start functions for struct config_item_type tb_dev_wwn_cit */ 1291 1292 static struct t10_wwn *to_t10_wwn(struct config_item *item) 1293 { 1294 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group); 1295 } 1296 1297 static ssize_t target_check_inquiry_data(char *buf) 1298 { 1299 size_t len; 1300 int i; 1301 1302 len = strlen(buf); 1303 1304 /* 1305 * SPC 4.3.1: 1306 * ASCII data fields shall contain only ASCII printable characters 1307 * (i.e., code values 20h to 7Eh) and may be terminated with one or 1308 * more ASCII null (00h) characters. 1309 */ 1310 for (i = 0; i < len; i++) { 1311 if (buf[i] < 0x20 || buf[i] > 0x7E) { 1312 pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n"); 1313 return -EINVAL; 1314 } 1315 } 1316 1317 return len; 1318 } 1319 1320 /* 1321 * STANDARD and VPD page 0x83 T10 Vendor Identification 1322 */ 1323 static ssize_t target_wwn_vendor_id_show(struct config_item *item, 1324 char *page) 1325 { 1326 return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]); 1327 } 1328 1329 static ssize_t target_wwn_vendor_id_store(struct config_item *item, 1330 const char *page, size_t count) 1331 { 1332 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1333 struct se_device *dev = t10_wwn->t10_dev; 1334 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1335 unsigned char buf[INQUIRY_VENDOR_LEN + 2]; 1336 char *stripped = NULL; 1337 size_t len; 1338 ssize_t ret; 1339 1340 len = strlcpy(buf, page, sizeof(buf)); 1341 if (len < sizeof(buf)) { 1342 /* Strip any newline added from userspace. */ 1343 stripped = strstrip(buf); 1344 len = strlen(stripped); 1345 } 1346 if (len > INQUIRY_VENDOR_LEN) { 1347 pr_err("Emulated T10 Vendor Identification exceeds" 1348 " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN) 1349 "\n"); 1350 return -EOVERFLOW; 1351 } 1352 1353 ret = target_check_inquiry_data(stripped); 1354 1355 if (ret < 0) 1356 return ret; 1357 1358 /* 1359 * Check to see if any active exports exist. If they do exist, fail 1360 * here as changing this information on the fly (underneath the 1361 * initiator side OS dependent multipath code) could cause negative 1362 * effects. 1363 */ 1364 if (dev->export_count) { 1365 pr_err("Unable to set T10 Vendor Identification while" 1366 " active %d exports exist\n", dev->export_count); 1367 return -EINVAL; 1368 } 1369 1370 BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1); 1371 strlcpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor)); 1372 1373 pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:" 1374 " %s\n", dev->t10_wwn.vendor); 1375 1376 return count; 1377 } 1378 1379 static ssize_t target_wwn_product_id_show(struct config_item *item, 1380 char *page) 1381 { 1382 return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]); 1383 } 1384 1385 static ssize_t target_wwn_product_id_store(struct config_item *item, 1386 const char *page, size_t count) 1387 { 1388 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1389 struct se_device *dev = t10_wwn->t10_dev; 1390 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1391 unsigned char buf[INQUIRY_MODEL_LEN + 2]; 1392 char *stripped = NULL; 1393 size_t len; 1394 ssize_t ret; 1395 1396 len = strlcpy(buf, page, sizeof(buf)); 1397 if (len < sizeof(buf)) { 1398 /* Strip any newline added from userspace. */ 1399 stripped = strstrip(buf); 1400 len = strlen(stripped); 1401 } 1402 if (len > INQUIRY_MODEL_LEN) { 1403 pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: " 1404 __stringify(INQUIRY_MODEL_LEN) 1405 "\n"); 1406 return -EOVERFLOW; 1407 } 1408 1409 ret = target_check_inquiry_data(stripped); 1410 1411 if (ret < 0) 1412 return ret; 1413 1414 /* 1415 * Check to see if any active exports exist. If they do exist, fail 1416 * here as changing this information on the fly (underneath the 1417 * initiator side OS dependent multipath code) could cause negative 1418 * effects. 1419 */ 1420 if (dev->export_count) { 1421 pr_err("Unable to set T10 Model while active %d exports exist\n", 1422 dev->export_count); 1423 return -EINVAL; 1424 } 1425 1426 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); 1427 strlcpy(dev->t10_wwn.model, stripped, sizeof(dev->t10_wwn.model)); 1428 1429 pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n", 1430 dev->t10_wwn.model); 1431 1432 return count; 1433 } 1434 1435 static ssize_t target_wwn_revision_show(struct config_item *item, 1436 char *page) 1437 { 1438 return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]); 1439 } 1440 1441 static ssize_t target_wwn_revision_store(struct config_item *item, 1442 const char *page, size_t count) 1443 { 1444 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1445 struct se_device *dev = t10_wwn->t10_dev; 1446 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1447 unsigned char buf[INQUIRY_REVISION_LEN + 2]; 1448 char *stripped = NULL; 1449 size_t len; 1450 ssize_t ret; 1451 1452 len = strlcpy(buf, page, sizeof(buf)); 1453 if (len < sizeof(buf)) { 1454 /* Strip any newline added from userspace. */ 1455 stripped = strstrip(buf); 1456 len = strlen(stripped); 1457 } 1458 if (len > INQUIRY_REVISION_LEN) { 1459 pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: " 1460 __stringify(INQUIRY_REVISION_LEN) 1461 "\n"); 1462 return -EOVERFLOW; 1463 } 1464 1465 ret = target_check_inquiry_data(stripped); 1466 1467 if (ret < 0) 1468 return ret; 1469 1470 /* 1471 * Check to see if any active exports exist. If they do exist, fail 1472 * here as changing this information on the fly (underneath the 1473 * initiator side OS dependent multipath code) could cause negative 1474 * effects. 1475 */ 1476 if (dev->export_count) { 1477 pr_err("Unable to set T10 Revision while active %d exports exist\n", 1478 dev->export_count); 1479 return -EINVAL; 1480 } 1481 1482 BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1); 1483 strlcpy(dev->t10_wwn.revision, stripped, sizeof(dev->t10_wwn.revision)); 1484 1485 pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n", 1486 dev->t10_wwn.revision); 1487 1488 return count; 1489 } 1490 1491 static ssize_t 1492 target_wwn_company_id_show(struct config_item *item, 1493 char *page) 1494 { 1495 return snprintf(page, PAGE_SIZE, "%#08x\n", 1496 to_t10_wwn(item)->company_id); 1497 } 1498 1499 static ssize_t 1500 target_wwn_company_id_store(struct config_item *item, 1501 const char *page, size_t count) 1502 { 1503 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1504 struct se_device *dev = t10_wwn->t10_dev; 1505 u32 val; 1506 int ret; 1507 1508 /* 1509 * The IEEE COMPANY_ID field should contain a 24-bit canonical 1510 * form OUI assigned by the IEEE. 1511 */ 1512 ret = kstrtou32(page, 0, &val); 1513 if (ret < 0) 1514 return ret; 1515 1516 if (val >= 0x1000000) 1517 return -EOVERFLOW; 1518 1519 /* 1520 * Check to see if any active exports exist. If they do exist, fail 1521 * here as changing this information on the fly (underneath the 1522 * initiator side OS dependent multipath code) could cause negative 1523 * effects. 1524 */ 1525 if (dev->export_count) { 1526 pr_err("Unable to set Company ID while %u exports exist\n", 1527 dev->export_count); 1528 return -EINVAL; 1529 } 1530 1531 t10_wwn->company_id = val; 1532 1533 pr_debug("Target_Core_ConfigFS: Set IEEE Company ID: %#08x\n", 1534 t10_wwn->company_id); 1535 1536 return count; 1537 } 1538 1539 /* 1540 * VPD page 0x80 Unit serial 1541 */ 1542 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item, 1543 char *page) 1544 { 1545 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 1546 &to_t10_wwn(item)->unit_serial[0]); 1547 } 1548 1549 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item, 1550 const char *page, size_t count) 1551 { 1552 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1553 struct se_device *dev = t10_wwn->t10_dev; 1554 unsigned char buf[INQUIRY_VPD_SERIAL_LEN] = { }; 1555 1556 /* 1557 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 1558 * from the struct scsi_device level firmware, do not allow 1559 * VPD Unit Serial to be emulated. 1560 * 1561 * Note this struct scsi_device could also be emulating VPD 1562 * information from its drivers/scsi LLD. But for now we assume 1563 * it is doing 'the right thing' wrt a world wide unique 1564 * VPD Unit Serial Number that OS dependent multipath can depend on. 1565 */ 1566 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) { 1567 pr_err("Underlying SCSI device firmware provided VPD" 1568 " Unit Serial, ignoring request\n"); 1569 return -EOPNOTSUPP; 1570 } 1571 1572 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 1573 pr_err("Emulated VPD Unit Serial exceeds" 1574 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 1575 return -EOVERFLOW; 1576 } 1577 /* 1578 * Check to see if any active $FABRIC_MOD exports exist. If they 1579 * do exist, fail here as changing this information on the fly 1580 * (underneath the initiator side OS dependent multipath code) 1581 * could cause negative effects. 1582 */ 1583 if (dev->export_count) { 1584 pr_err("Unable to set VPD Unit Serial while" 1585 " active %d $FABRIC_MOD exports exist\n", 1586 dev->export_count); 1587 return -EINVAL; 1588 } 1589 1590 /* 1591 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 1592 * 1593 * Also, strip any newline added from the userspace 1594 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 1595 */ 1596 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 1597 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 1598 "%s", strstrip(buf)); 1599 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL; 1600 1601 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 1602 " %s\n", dev->t10_wwn.unit_serial); 1603 1604 return count; 1605 } 1606 1607 /* 1608 * VPD page 0x83 Protocol Identifier 1609 */ 1610 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item, 1611 char *page) 1612 { 1613 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1614 struct t10_vpd *vpd; 1615 unsigned char buf[VPD_TMP_BUF_SIZE] = { }; 1616 ssize_t len = 0; 1617 1618 spin_lock(&t10_wwn->t10_vpd_lock); 1619 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 1620 if (!vpd->protocol_identifier_set) 1621 continue; 1622 1623 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 1624 1625 if (len + strlen(buf) >= PAGE_SIZE) 1626 break; 1627 1628 len += sprintf(page+len, "%s", buf); 1629 } 1630 spin_unlock(&t10_wwn->t10_vpd_lock); 1631 1632 return len; 1633 } 1634 1635 /* 1636 * Generic wrapper for dumping VPD identifiers by association. 1637 */ 1638 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 1639 static ssize_t target_wwn_##_name##_show(struct config_item *item, \ 1640 char *page) \ 1641 { \ 1642 struct t10_wwn *t10_wwn = to_t10_wwn(item); \ 1643 struct t10_vpd *vpd; \ 1644 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 1645 ssize_t len = 0; \ 1646 \ 1647 spin_lock(&t10_wwn->t10_vpd_lock); \ 1648 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 1649 if (vpd->association != _assoc) \ 1650 continue; \ 1651 \ 1652 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1653 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 1654 if (len + strlen(buf) >= PAGE_SIZE) \ 1655 break; \ 1656 len += sprintf(page+len, "%s", buf); \ 1657 \ 1658 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1659 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 1660 if (len + strlen(buf) >= PAGE_SIZE) \ 1661 break; \ 1662 len += sprintf(page+len, "%s", buf); \ 1663 \ 1664 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1665 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 1666 if (len + strlen(buf) >= PAGE_SIZE) \ 1667 break; \ 1668 len += sprintf(page+len, "%s", buf); \ 1669 } \ 1670 spin_unlock(&t10_wwn->t10_vpd_lock); \ 1671 \ 1672 return len; \ 1673 } 1674 1675 /* VPD page 0x83 Association: Logical Unit */ 1676 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 1677 /* VPD page 0x83 Association: Target Port */ 1678 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 1679 /* VPD page 0x83 Association: SCSI Target Device */ 1680 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 1681 1682 CONFIGFS_ATTR(target_wwn_, vendor_id); 1683 CONFIGFS_ATTR(target_wwn_, product_id); 1684 CONFIGFS_ATTR(target_wwn_, revision); 1685 CONFIGFS_ATTR(target_wwn_, company_id); 1686 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial); 1687 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier); 1688 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit); 1689 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port); 1690 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device); 1691 1692 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 1693 &target_wwn_attr_vendor_id, 1694 &target_wwn_attr_product_id, 1695 &target_wwn_attr_revision, 1696 &target_wwn_attr_company_id, 1697 &target_wwn_attr_vpd_unit_serial, 1698 &target_wwn_attr_vpd_protocol_identifier, 1699 &target_wwn_attr_vpd_assoc_logical_unit, 1700 &target_wwn_attr_vpd_assoc_target_port, 1701 &target_wwn_attr_vpd_assoc_scsi_target_device, 1702 NULL, 1703 }; 1704 1705 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs); 1706 1707 /* End functions for struct config_item_type tb_dev_wwn_cit */ 1708 1709 /* Start functions for struct config_item_type tb_dev_pr_cit */ 1710 1711 static struct se_device *pr_to_dev(struct config_item *item) 1712 { 1713 return container_of(to_config_group(item), struct se_device, 1714 dev_pr_group); 1715 } 1716 1717 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev, 1718 char *page) 1719 { 1720 struct se_node_acl *se_nacl; 1721 struct t10_pr_registration *pr_reg; 1722 char i_buf[PR_REG_ISID_ID_LEN] = { }; 1723 1724 pr_reg = dev->dev_pr_res_holder; 1725 if (!pr_reg) 1726 return sprintf(page, "No SPC-3 Reservation holder\n"); 1727 1728 se_nacl = pr_reg->pr_reg_nacl; 1729 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1730 1731 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", 1732 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1733 se_nacl->initiatorname, i_buf); 1734 } 1735 1736 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, 1737 char *page) 1738 { 1739 struct se_session *sess = dev->reservation_holder; 1740 struct se_node_acl *se_nacl; 1741 ssize_t len; 1742 1743 if (sess) { 1744 se_nacl = sess->se_node_acl; 1745 len = sprintf(page, 1746 "SPC-2 Reservation: %s Initiator: %s\n", 1747 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1748 se_nacl->initiatorname); 1749 } else { 1750 len = sprintf(page, "No SPC-2 Reservation holder\n"); 1751 } 1752 return len; 1753 } 1754 1755 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page) 1756 { 1757 struct se_device *dev = pr_to_dev(item); 1758 int ret; 1759 1760 if (!dev->dev_attrib.emulate_pr) 1761 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 1762 1763 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1764 return sprintf(page, "Passthrough\n"); 1765 1766 spin_lock(&dev->dev_reservation_lock); 1767 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1768 ret = target_core_dev_pr_show_spc2_res(dev, page); 1769 else 1770 ret = target_core_dev_pr_show_spc3_res(dev, page); 1771 spin_unlock(&dev->dev_reservation_lock); 1772 return ret; 1773 } 1774 1775 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item, 1776 char *page) 1777 { 1778 struct se_device *dev = pr_to_dev(item); 1779 ssize_t len = 0; 1780 1781 spin_lock(&dev->dev_reservation_lock); 1782 if (!dev->dev_pr_res_holder) { 1783 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1784 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { 1785 len = sprintf(page, "SPC-3 Reservation: All Target" 1786 " Ports registration\n"); 1787 } else { 1788 len = sprintf(page, "SPC-3 Reservation: Single" 1789 " Target Port registration\n"); 1790 } 1791 1792 spin_unlock(&dev->dev_reservation_lock); 1793 return len; 1794 } 1795 1796 static ssize_t target_pr_res_pr_generation_show(struct config_item *item, 1797 char *page) 1798 { 1799 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation); 1800 } 1801 1802 1803 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item, 1804 char *page) 1805 { 1806 struct se_device *dev = pr_to_dev(item); 1807 struct se_node_acl *se_nacl; 1808 struct se_portal_group *se_tpg; 1809 struct t10_pr_registration *pr_reg; 1810 const struct target_core_fabric_ops *tfo; 1811 ssize_t len = 0; 1812 1813 spin_lock(&dev->dev_reservation_lock); 1814 pr_reg = dev->dev_pr_res_holder; 1815 if (!pr_reg) { 1816 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1817 goto out_unlock; 1818 } 1819 1820 se_nacl = pr_reg->pr_reg_nacl; 1821 se_tpg = se_nacl->se_tpg; 1822 tfo = se_tpg->se_tpg_tfo; 1823 1824 len += sprintf(page+len, "SPC-3 Reservation: %s" 1825 " Target Node Endpoint: %s\n", tfo->fabric_name, 1826 tfo->tpg_get_wwn(se_tpg)); 1827 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1828 " Identifier Tag: %hu %s Portal Group Tag: %hu" 1829 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi, 1830 tfo->fabric_name, tfo->tpg_get_tag(se_tpg), 1831 tfo->fabric_name, pr_reg->pr_aptpl_target_lun); 1832 1833 out_unlock: 1834 spin_unlock(&dev->dev_reservation_lock); 1835 return len; 1836 } 1837 1838 1839 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item, 1840 char *page) 1841 { 1842 struct se_device *dev = pr_to_dev(item); 1843 const struct target_core_fabric_ops *tfo; 1844 struct t10_pr_registration *pr_reg; 1845 unsigned char buf[384]; 1846 char i_buf[PR_REG_ISID_ID_LEN]; 1847 ssize_t len = 0; 1848 int reg_count = 0; 1849 1850 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1851 1852 spin_lock(&dev->t10_pr.registration_lock); 1853 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1854 pr_reg_list) { 1855 1856 memset(buf, 0, 384); 1857 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1858 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1859 core_pr_dump_initiator_port(pr_reg, i_buf, 1860 PR_REG_ISID_ID_LEN); 1861 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1862 tfo->fabric_name, 1863 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, 1864 pr_reg->pr_res_generation); 1865 1866 if (len + strlen(buf) >= PAGE_SIZE) 1867 break; 1868 1869 len += sprintf(page+len, "%s", buf); 1870 reg_count++; 1871 } 1872 spin_unlock(&dev->t10_pr.registration_lock); 1873 1874 if (!reg_count) 1875 len += sprintf(page+len, "None\n"); 1876 1877 return len; 1878 } 1879 1880 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page) 1881 { 1882 struct se_device *dev = pr_to_dev(item); 1883 struct t10_pr_registration *pr_reg; 1884 ssize_t len = 0; 1885 1886 spin_lock(&dev->dev_reservation_lock); 1887 pr_reg = dev->dev_pr_res_holder; 1888 if (pr_reg) { 1889 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1890 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 1891 } else { 1892 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1893 } 1894 1895 spin_unlock(&dev->dev_reservation_lock); 1896 return len; 1897 } 1898 1899 static ssize_t target_pr_res_type_show(struct config_item *item, char *page) 1900 { 1901 struct se_device *dev = pr_to_dev(item); 1902 1903 if (!dev->dev_attrib.emulate_pr) 1904 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 1905 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1906 return sprintf(page, "SPC_PASSTHROUGH\n"); 1907 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1908 return sprintf(page, "SPC2_RESERVATIONS\n"); 1909 1910 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 1911 } 1912 1913 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item, 1914 char *page) 1915 { 1916 struct se_device *dev = pr_to_dev(item); 1917 1918 if (!dev->dev_attrib.emulate_pr || 1919 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 1920 return 0; 1921 1922 return sprintf(page, "APTPL Bit Status: %s\n", 1923 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 1924 } 1925 1926 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item, 1927 char *page) 1928 { 1929 struct se_device *dev = pr_to_dev(item); 1930 1931 if (!dev->dev_attrib.emulate_pr || 1932 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 1933 return 0; 1934 1935 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 1936 } 1937 1938 enum { 1939 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 1940 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 1941 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 1942 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 1943 }; 1944 1945 static match_table_t tokens = { 1946 {Opt_initiator_fabric, "initiator_fabric=%s"}, 1947 {Opt_initiator_node, "initiator_node=%s"}, 1948 {Opt_initiator_sid, "initiator_sid=%s"}, 1949 {Opt_sa_res_key, "sa_res_key=%s"}, 1950 {Opt_res_holder, "res_holder=%d"}, 1951 {Opt_res_type, "res_type=%d"}, 1952 {Opt_res_scope, "res_scope=%d"}, 1953 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 1954 {Opt_mapped_lun, "mapped_lun=%u"}, 1955 {Opt_target_fabric, "target_fabric=%s"}, 1956 {Opt_target_node, "target_node=%s"}, 1957 {Opt_tpgt, "tpgt=%d"}, 1958 {Opt_port_rtpi, "port_rtpi=%d"}, 1959 {Opt_target_lun, "target_lun=%u"}, 1960 {Opt_err, NULL} 1961 }; 1962 1963 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item, 1964 const char *page, size_t count) 1965 { 1966 struct se_device *dev = pr_to_dev(item); 1967 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 1968 unsigned char *t_fabric = NULL, *t_port = NULL; 1969 char *orig, *ptr, *opts; 1970 substring_t args[MAX_OPT_ARGS]; 1971 unsigned long long tmp_ll; 1972 u64 sa_res_key = 0; 1973 u64 mapped_lun = 0, target_lun = 0; 1974 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 1975 u16 tpgt = 0; 1976 u8 type = 0; 1977 1978 if (!dev->dev_attrib.emulate_pr || 1979 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 1980 return count; 1981 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1982 return count; 1983 1984 if (dev->export_count) { 1985 pr_debug("Unable to process APTPL metadata while" 1986 " active fabric exports exist\n"); 1987 return -EINVAL; 1988 } 1989 1990 opts = kstrdup(page, GFP_KERNEL); 1991 if (!opts) 1992 return -ENOMEM; 1993 1994 orig = opts; 1995 while ((ptr = strsep(&opts, ",\n")) != NULL) { 1996 if (!*ptr) 1997 continue; 1998 1999 token = match_token(ptr, tokens, args); 2000 switch (token) { 2001 case Opt_initiator_fabric: 2002 i_fabric = match_strdup(args); 2003 if (!i_fabric) { 2004 ret = -ENOMEM; 2005 goto out; 2006 } 2007 break; 2008 case Opt_initiator_node: 2009 i_port = match_strdup(args); 2010 if (!i_port) { 2011 ret = -ENOMEM; 2012 goto out; 2013 } 2014 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 2015 pr_err("APTPL metadata initiator_node=" 2016 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 2017 PR_APTPL_MAX_IPORT_LEN); 2018 ret = -EINVAL; 2019 break; 2020 } 2021 break; 2022 case Opt_initiator_sid: 2023 isid = match_strdup(args); 2024 if (!isid) { 2025 ret = -ENOMEM; 2026 goto out; 2027 } 2028 if (strlen(isid) >= PR_REG_ISID_LEN) { 2029 pr_err("APTPL metadata initiator_isid" 2030 "= exceeds PR_REG_ISID_LEN: %d\n", 2031 PR_REG_ISID_LEN); 2032 ret = -EINVAL; 2033 break; 2034 } 2035 break; 2036 case Opt_sa_res_key: 2037 ret = match_u64(args, &tmp_ll); 2038 if (ret < 0) { 2039 pr_err("kstrtoull() failed for sa_res_key=\n"); 2040 goto out; 2041 } 2042 sa_res_key = (u64)tmp_ll; 2043 break; 2044 /* 2045 * PR APTPL Metadata for Reservation 2046 */ 2047 case Opt_res_holder: 2048 ret = match_int(args, &arg); 2049 if (ret) 2050 goto out; 2051 res_holder = arg; 2052 break; 2053 case Opt_res_type: 2054 ret = match_int(args, &arg); 2055 if (ret) 2056 goto out; 2057 type = (u8)arg; 2058 break; 2059 case Opt_res_scope: 2060 ret = match_int(args, &arg); 2061 if (ret) 2062 goto out; 2063 break; 2064 case Opt_res_all_tg_pt: 2065 ret = match_int(args, &arg); 2066 if (ret) 2067 goto out; 2068 all_tg_pt = (int)arg; 2069 break; 2070 case Opt_mapped_lun: 2071 ret = match_u64(args, &tmp_ll); 2072 if (ret) 2073 goto out; 2074 mapped_lun = (u64)tmp_ll; 2075 break; 2076 /* 2077 * PR APTPL Metadata for Target Port 2078 */ 2079 case Opt_target_fabric: 2080 t_fabric = match_strdup(args); 2081 if (!t_fabric) { 2082 ret = -ENOMEM; 2083 goto out; 2084 } 2085 break; 2086 case Opt_target_node: 2087 t_port = match_strdup(args); 2088 if (!t_port) { 2089 ret = -ENOMEM; 2090 goto out; 2091 } 2092 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 2093 pr_err("APTPL metadata target_node=" 2094 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 2095 PR_APTPL_MAX_TPORT_LEN); 2096 ret = -EINVAL; 2097 break; 2098 } 2099 break; 2100 case Opt_tpgt: 2101 ret = match_int(args, &arg); 2102 if (ret) 2103 goto out; 2104 tpgt = (u16)arg; 2105 break; 2106 case Opt_port_rtpi: 2107 ret = match_int(args, &arg); 2108 if (ret) 2109 goto out; 2110 break; 2111 case Opt_target_lun: 2112 ret = match_u64(args, &tmp_ll); 2113 if (ret) 2114 goto out; 2115 target_lun = (u64)tmp_ll; 2116 break; 2117 default: 2118 break; 2119 } 2120 } 2121 2122 if (!i_port || !t_port || !sa_res_key) { 2123 pr_err("Illegal parameters for APTPL registration\n"); 2124 ret = -EINVAL; 2125 goto out; 2126 } 2127 2128 if (res_holder && !(type)) { 2129 pr_err("Illegal PR type: 0x%02x for reservation" 2130 " holder\n", type); 2131 ret = -EINVAL; 2132 goto out; 2133 } 2134 2135 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, 2136 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 2137 res_holder, all_tg_pt, type); 2138 out: 2139 kfree(i_fabric); 2140 kfree(i_port); 2141 kfree(isid); 2142 kfree(t_fabric); 2143 kfree(t_port); 2144 kfree(orig); 2145 return (ret == 0) ? count : ret; 2146 } 2147 2148 2149 CONFIGFS_ATTR_RO(target_pr_, res_holder); 2150 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts); 2151 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation); 2152 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port); 2153 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts); 2154 CONFIGFS_ATTR_RO(target_pr_, res_pr_type); 2155 CONFIGFS_ATTR_RO(target_pr_, res_type); 2156 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active); 2157 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata); 2158 2159 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 2160 &target_pr_attr_res_holder, 2161 &target_pr_attr_res_pr_all_tgt_pts, 2162 &target_pr_attr_res_pr_generation, 2163 &target_pr_attr_res_pr_holder_tg_port, 2164 &target_pr_attr_res_pr_registered_i_pts, 2165 &target_pr_attr_res_pr_type, 2166 &target_pr_attr_res_type, 2167 &target_pr_attr_res_aptpl_active, 2168 &target_pr_attr_res_aptpl_metadata, 2169 NULL, 2170 }; 2171 2172 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs); 2173 2174 /* End functions for struct config_item_type tb_dev_pr_cit */ 2175 2176 /* Start functions for struct config_item_type tb_dev_cit */ 2177 2178 static inline struct se_device *to_device(struct config_item *item) 2179 { 2180 return container_of(to_config_group(item), struct se_device, dev_group); 2181 } 2182 2183 static ssize_t target_dev_info_show(struct config_item *item, char *page) 2184 { 2185 struct se_device *dev = to_device(item); 2186 int bl = 0; 2187 ssize_t read_bytes = 0; 2188 2189 transport_dump_dev_state(dev, page, &bl); 2190 read_bytes += bl; 2191 read_bytes += dev->transport->show_configfs_dev_params(dev, 2192 page+read_bytes); 2193 return read_bytes; 2194 } 2195 2196 static ssize_t target_dev_control_store(struct config_item *item, 2197 const char *page, size_t count) 2198 { 2199 struct se_device *dev = to_device(item); 2200 2201 return dev->transport->set_configfs_dev_params(dev, page, count); 2202 } 2203 2204 static ssize_t target_dev_alias_show(struct config_item *item, char *page) 2205 { 2206 struct se_device *dev = to_device(item); 2207 2208 if (!(dev->dev_flags & DF_USING_ALIAS)) 2209 return 0; 2210 2211 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); 2212 } 2213 2214 static ssize_t target_dev_alias_store(struct config_item *item, 2215 const char *page, size_t count) 2216 { 2217 struct se_device *dev = to_device(item); 2218 struct se_hba *hba = dev->se_hba; 2219 ssize_t read_bytes; 2220 2221 if (count > (SE_DEV_ALIAS_LEN-1)) { 2222 pr_err("alias count: %d exceeds" 2223 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 2224 SE_DEV_ALIAS_LEN-1); 2225 return -EINVAL; 2226 } 2227 2228 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); 2229 if (!read_bytes) 2230 return -EINVAL; 2231 if (dev->dev_alias[read_bytes - 1] == '\n') 2232 dev->dev_alias[read_bytes - 1] = '\0'; 2233 2234 dev->dev_flags |= DF_USING_ALIAS; 2235 2236 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 2237 config_item_name(&hba->hba_group.cg_item), 2238 config_item_name(&dev->dev_group.cg_item), 2239 dev->dev_alias); 2240 2241 return read_bytes; 2242 } 2243 2244 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page) 2245 { 2246 struct se_device *dev = to_device(item); 2247 2248 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) 2249 return 0; 2250 2251 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); 2252 } 2253 2254 static ssize_t target_dev_udev_path_store(struct config_item *item, 2255 const char *page, size_t count) 2256 { 2257 struct se_device *dev = to_device(item); 2258 struct se_hba *hba = dev->se_hba; 2259 ssize_t read_bytes; 2260 2261 if (count > (SE_UDEV_PATH_LEN-1)) { 2262 pr_err("udev_path count: %d exceeds" 2263 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 2264 SE_UDEV_PATH_LEN-1); 2265 return -EINVAL; 2266 } 2267 2268 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, 2269 "%s", page); 2270 if (!read_bytes) 2271 return -EINVAL; 2272 if (dev->udev_path[read_bytes - 1] == '\n') 2273 dev->udev_path[read_bytes - 1] = '\0'; 2274 2275 dev->dev_flags |= DF_USING_UDEV_PATH; 2276 2277 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 2278 config_item_name(&hba->hba_group.cg_item), 2279 config_item_name(&dev->dev_group.cg_item), 2280 dev->udev_path); 2281 2282 return read_bytes; 2283 } 2284 2285 static ssize_t target_dev_enable_show(struct config_item *item, char *page) 2286 { 2287 struct se_device *dev = to_device(item); 2288 2289 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev)); 2290 } 2291 2292 static ssize_t target_dev_enable_store(struct config_item *item, 2293 const char *page, size_t count) 2294 { 2295 struct se_device *dev = to_device(item); 2296 char *ptr; 2297 int ret; 2298 2299 ptr = strstr(page, "1"); 2300 if (!ptr) { 2301 pr_err("For dev_enable ops, only valid value" 2302 " is \"1\"\n"); 2303 return -EINVAL; 2304 } 2305 2306 ret = target_configure_device(dev); 2307 if (ret) 2308 return ret; 2309 return count; 2310 } 2311 2312 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page) 2313 { 2314 struct se_device *dev = to_device(item); 2315 struct config_item *lu_ci; 2316 struct t10_alua_lu_gp *lu_gp; 2317 struct t10_alua_lu_gp_member *lu_gp_mem; 2318 ssize_t len = 0; 2319 2320 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2321 if (!lu_gp_mem) 2322 return 0; 2323 2324 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2325 lu_gp = lu_gp_mem->lu_gp; 2326 if (lu_gp) { 2327 lu_ci = &lu_gp->lu_gp_group.cg_item; 2328 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 2329 config_item_name(lu_ci), lu_gp->lu_gp_id); 2330 } 2331 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2332 2333 return len; 2334 } 2335 2336 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item, 2337 const char *page, size_t count) 2338 { 2339 struct se_device *dev = to_device(item); 2340 struct se_hba *hba = dev->se_hba; 2341 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 2342 struct t10_alua_lu_gp_member *lu_gp_mem; 2343 unsigned char buf[LU_GROUP_NAME_BUF] = { }; 2344 int move = 0; 2345 2346 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2347 if (!lu_gp_mem) 2348 return count; 2349 2350 if (count > LU_GROUP_NAME_BUF) { 2351 pr_err("ALUA LU Group Alias too large!\n"); 2352 return -EINVAL; 2353 } 2354 memcpy(buf, page, count); 2355 /* 2356 * Any ALUA logical unit alias besides "NULL" means we will be 2357 * making a new group association. 2358 */ 2359 if (strcmp(strstrip(buf), "NULL")) { 2360 /* 2361 * core_alua_get_lu_gp_by_name() will increment reference to 2362 * struct t10_alua_lu_gp. This reference is released with 2363 * core_alua_get_lu_gp_by_name below(). 2364 */ 2365 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 2366 if (!lu_gp_new) 2367 return -ENODEV; 2368 } 2369 2370 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2371 lu_gp = lu_gp_mem->lu_gp; 2372 if (lu_gp) { 2373 /* 2374 * Clearing an existing lu_gp association, and replacing 2375 * with NULL 2376 */ 2377 if (!lu_gp_new) { 2378 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 2379 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 2380 " %hu\n", 2381 config_item_name(&hba->hba_group.cg_item), 2382 config_item_name(&dev->dev_group.cg_item), 2383 config_item_name(&lu_gp->lu_gp_group.cg_item), 2384 lu_gp->lu_gp_id); 2385 2386 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2387 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2388 2389 return count; 2390 } 2391 /* 2392 * Removing existing association of lu_gp_mem with lu_gp 2393 */ 2394 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2395 move = 1; 2396 } 2397 /* 2398 * Associate lu_gp_mem with lu_gp_new. 2399 */ 2400 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 2401 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2402 2403 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 2404 " core/alua/lu_gps/%s, ID: %hu\n", 2405 (move) ? "Moving" : "Adding", 2406 config_item_name(&hba->hba_group.cg_item), 2407 config_item_name(&dev->dev_group.cg_item), 2408 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 2409 lu_gp_new->lu_gp_id); 2410 2411 core_alua_put_lu_gp_from_name(lu_gp_new); 2412 return count; 2413 } 2414 2415 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page) 2416 { 2417 struct se_device *dev = to_device(item); 2418 struct t10_alua_lba_map *map; 2419 struct t10_alua_lba_map_member *mem; 2420 char *b = page; 2421 int bl = 0; 2422 char state; 2423 2424 spin_lock(&dev->t10_alua.lba_map_lock); 2425 if (!list_empty(&dev->t10_alua.lba_map_list)) 2426 bl += sprintf(b + bl, "%u %u\n", 2427 dev->t10_alua.lba_map_segment_size, 2428 dev->t10_alua.lba_map_segment_multiplier); 2429 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) { 2430 bl += sprintf(b + bl, "%llu %llu", 2431 map->lba_map_first_lba, map->lba_map_last_lba); 2432 list_for_each_entry(mem, &map->lba_map_mem_list, 2433 lba_map_mem_list) { 2434 switch (mem->lba_map_mem_alua_state) { 2435 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: 2436 state = 'O'; 2437 break; 2438 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: 2439 state = 'A'; 2440 break; 2441 case ALUA_ACCESS_STATE_STANDBY: 2442 state = 'S'; 2443 break; 2444 case ALUA_ACCESS_STATE_UNAVAILABLE: 2445 state = 'U'; 2446 break; 2447 default: 2448 state = '.'; 2449 break; 2450 } 2451 bl += sprintf(b + bl, " %d:%c", 2452 mem->lba_map_mem_alua_pg_id, state); 2453 } 2454 bl += sprintf(b + bl, "\n"); 2455 } 2456 spin_unlock(&dev->t10_alua.lba_map_lock); 2457 return bl; 2458 } 2459 2460 static ssize_t target_dev_lba_map_store(struct config_item *item, 2461 const char *page, size_t count) 2462 { 2463 struct se_device *dev = to_device(item); 2464 struct t10_alua_lba_map *lba_map = NULL; 2465 struct list_head lba_list; 2466 char *map_entries, *orig, *ptr; 2467 char state; 2468 int pg_num = -1, pg; 2469 int ret = 0, num = 0, pg_id, alua_state; 2470 unsigned long start_lba = -1, end_lba = -1; 2471 unsigned long segment_size = -1, segment_mult = -1; 2472 2473 orig = map_entries = kstrdup(page, GFP_KERNEL); 2474 if (!map_entries) 2475 return -ENOMEM; 2476 2477 INIT_LIST_HEAD(&lba_list); 2478 while ((ptr = strsep(&map_entries, "\n")) != NULL) { 2479 if (!*ptr) 2480 continue; 2481 2482 if (num == 0) { 2483 if (sscanf(ptr, "%lu %lu\n", 2484 &segment_size, &segment_mult) != 2) { 2485 pr_err("Invalid line %d\n", num); 2486 ret = -EINVAL; 2487 break; 2488 } 2489 num++; 2490 continue; 2491 } 2492 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) { 2493 pr_err("Invalid line %d\n", num); 2494 ret = -EINVAL; 2495 break; 2496 } 2497 ptr = strchr(ptr, ' '); 2498 if (!ptr) { 2499 pr_err("Invalid line %d, missing end lba\n", num); 2500 ret = -EINVAL; 2501 break; 2502 } 2503 ptr++; 2504 ptr = strchr(ptr, ' '); 2505 if (!ptr) { 2506 pr_err("Invalid line %d, missing state definitions\n", 2507 num); 2508 ret = -EINVAL; 2509 break; 2510 } 2511 ptr++; 2512 lba_map = core_alua_allocate_lba_map(&lba_list, 2513 start_lba, end_lba); 2514 if (IS_ERR(lba_map)) { 2515 ret = PTR_ERR(lba_map); 2516 break; 2517 } 2518 pg = 0; 2519 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) { 2520 switch (state) { 2521 case 'O': 2522 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED; 2523 break; 2524 case 'A': 2525 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED; 2526 break; 2527 case 'S': 2528 alua_state = ALUA_ACCESS_STATE_STANDBY; 2529 break; 2530 case 'U': 2531 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE; 2532 break; 2533 default: 2534 pr_err("Invalid ALUA state '%c'\n", state); 2535 ret = -EINVAL; 2536 goto out; 2537 } 2538 2539 ret = core_alua_allocate_lba_map_mem(lba_map, 2540 pg_id, alua_state); 2541 if (ret) { 2542 pr_err("Invalid target descriptor %d:%c " 2543 "at line %d\n", 2544 pg_id, state, num); 2545 break; 2546 } 2547 pg++; 2548 ptr = strchr(ptr, ' '); 2549 if (ptr) 2550 ptr++; 2551 else 2552 break; 2553 } 2554 if (pg_num == -1) 2555 pg_num = pg; 2556 else if (pg != pg_num) { 2557 pr_err("Only %d from %d port groups definitions " 2558 "at line %d\n", pg, pg_num, num); 2559 ret = -EINVAL; 2560 break; 2561 } 2562 num++; 2563 } 2564 out: 2565 if (ret) { 2566 core_alua_free_lba_map(&lba_list); 2567 count = ret; 2568 } else 2569 core_alua_set_lba_map(dev, &lba_list, 2570 segment_size, segment_mult); 2571 kfree(orig); 2572 return count; 2573 } 2574 2575 CONFIGFS_ATTR_RO(target_dev_, info); 2576 CONFIGFS_ATTR_WO(target_dev_, control); 2577 CONFIGFS_ATTR(target_dev_, alias); 2578 CONFIGFS_ATTR(target_dev_, udev_path); 2579 CONFIGFS_ATTR(target_dev_, enable); 2580 CONFIGFS_ATTR(target_dev_, alua_lu_gp); 2581 CONFIGFS_ATTR(target_dev_, lba_map); 2582 2583 static struct configfs_attribute *target_core_dev_attrs[] = { 2584 &target_dev_attr_info, 2585 &target_dev_attr_control, 2586 &target_dev_attr_alias, 2587 &target_dev_attr_udev_path, 2588 &target_dev_attr_enable, 2589 &target_dev_attr_alua_lu_gp, 2590 &target_dev_attr_lba_map, 2591 NULL, 2592 }; 2593 2594 static void target_core_dev_release(struct config_item *item) 2595 { 2596 struct config_group *dev_cg = to_config_group(item); 2597 struct se_device *dev = 2598 container_of(dev_cg, struct se_device, dev_group); 2599 2600 target_free_device(dev); 2601 } 2602 2603 /* 2604 * Used in target_core_fabric_configfs.c to verify valid se_device symlink 2605 * within target_fabric_port_link() 2606 */ 2607 struct configfs_item_operations target_core_dev_item_ops = { 2608 .release = target_core_dev_release, 2609 }; 2610 2611 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs); 2612 2613 /* End functions for struct config_item_type tb_dev_cit */ 2614 2615 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 2616 2617 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item) 2618 { 2619 return container_of(to_config_group(item), struct t10_alua_lu_gp, 2620 lu_gp_group); 2621 } 2622 2623 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page) 2624 { 2625 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2626 2627 if (!lu_gp->lu_gp_valid_id) 2628 return 0; 2629 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2630 } 2631 2632 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item, 2633 const char *page, size_t count) 2634 { 2635 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2636 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2637 unsigned long lu_gp_id; 2638 int ret; 2639 2640 ret = kstrtoul(page, 0, &lu_gp_id); 2641 if (ret < 0) { 2642 pr_err("kstrtoul() returned %d for" 2643 " lu_gp_id\n", ret); 2644 return ret; 2645 } 2646 if (lu_gp_id > 0x0000ffff) { 2647 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 2648 " 0x0000ffff\n", lu_gp_id); 2649 return -EINVAL; 2650 } 2651 2652 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2653 if (ret < 0) 2654 return -EINVAL; 2655 2656 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 2657 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2658 config_item_name(&alua_lu_gp_cg->cg_item), 2659 lu_gp->lu_gp_id); 2660 2661 return count; 2662 } 2663 2664 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page) 2665 { 2666 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2667 struct se_device *dev; 2668 struct se_hba *hba; 2669 struct t10_alua_lu_gp_member *lu_gp_mem; 2670 ssize_t len = 0, cur_len; 2671 unsigned char buf[LU_GROUP_NAME_BUF] = { }; 2672 2673 spin_lock(&lu_gp->lu_gp_lock); 2674 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2675 dev = lu_gp_mem->lu_gp_mem_dev; 2676 hba = dev->se_hba; 2677 2678 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 2679 config_item_name(&hba->hba_group.cg_item), 2680 config_item_name(&dev->dev_group.cg_item)); 2681 cur_len++; /* Extra byte for NULL terminator */ 2682 2683 if ((cur_len + len) > PAGE_SIZE) { 2684 pr_warn("Ran out of lu_gp_show_attr" 2685 "_members buffer\n"); 2686 break; 2687 } 2688 memcpy(page+len, buf, cur_len); 2689 len += cur_len; 2690 } 2691 spin_unlock(&lu_gp->lu_gp_lock); 2692 2693 return len; 2694 } 2695 2696 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id); 2697 CONFIGFS_ATTR_RO(target_lu_gp_, members); 2698 2699 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2700 &target_lu_gp_attr_lu_gp_id, 2701 &target_lu_gp_attr_members, 2702 NULL, 2703 }; 2704 2705 static void target_core_alua_lu_gp_release(struct config_item *item) 2706 { 2707 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2708 struct t10_alua_lu_gp, lu_gp_group); 2709 2710 core_alua_free_lu_gp(lu_gp); 2711 } 2712 2713 static struct configfs_item_operations target_core_alua_lu_gp_ops = { 2714 .release = target_core_alua_lu_gp_release, 2715 }; 2716 2717 static const struct config_item_type target_core_alua_lu_gp_cit = { 2718 .ct_item_ops = &target_core_alua_lu_gp_ops, 2719 .ct_attrs = target_core_alua_lu_gp_attrs, 2720 .ct_owner = THIS_MODULE, 2721 }; 2722 2723 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2724 2725 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2726 2727 static struct config_group *target_core_alua_create_lu_gp( 2728 struct config_group *group, 2729 const char *name) 2730 { 2731 struct t10_alua_lu_gp *lu_gp; 2732 struct config_group *alua_lu_gp_cg = NULL; 2733 struct config_item *alua_lu_gp_ci = NULL; 2734 2735 lu_gp = core_alua_allocate_lu_gp(name, 0); 2736 if (IS_ERR(lu_gp)) 2737 return NULL; 2738 2739 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2740 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2741 2742 config_group_init_type_name(alua_lu_gp_cg, name, 2743 &target_core_alua_lu_gp_cit); 2744 2745 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2746 " Group: core/alua/lu_gps/%s\n", 2747 config_item_name(alua_lu_gp_ci)); 2748 2749 return alua_lu_gp_cg; 2750 2751 } 2752 2753 static void target_core_alua_drop_lu_gp( 2754 struct config_group *group, 2755 struct config_item *item) 2756 { 2757 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2758 struct t10_alua_lu_gp, lu_gp_group); 2759 2760 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2761 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2762 config_item_name(item), lu_gp->lu_gp_id); 2763 /* 2764 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 2765 * -> target_core_alua_lu_gp_release() 2766 */ 2767 config_item_put(item); 2768 } 2769 2770 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2771 .make_group = &target_core_alua_create_lu_gp, 2772 .drop_item = &target_core_alua_drop_lu_gp, 2773 }; 2774 2775 static const struct config_item_type target_core_alua_lu_gps_cit = { 2776 .ct_item_ops = NULL, 2777 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2778 .ct_owner = THIS_MODULE, 2779 }; 2780 2781 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2782 2783 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2784 2785 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item) 2786 { 2787 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp, 2788 tg_pt_gp_group); 2789 } 2790 2791 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item, 2792 char *page) 2793 { 2794 return sprintf(page, "%d\n", 2795 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state); 2796 } 2797 2798 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item, 2799 const char *page, size_t count) 2800 { 2801 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2802 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; 2803 unsigned long tmp; 2804 int new_state, ret; 2805 2806 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2807 pr_err("Unable to do implicit ALUA on invalid tg_pt_gp ID\n"); 2808 return -EINVAL; 2809 } 2810 if (!target_dev_configured(dev)) { 2811 pr_err("Unable to set alua_access_state while device is" 2812 " not configured\n"); 2813 return -ENODEV; 2814 } 2815 2816 ret = kstrtoul(page, 0, &tmp); 2817 if (ret < 0) { 2818 pr_err("Unable to extract new ALUA access state from" 2819 " %s\n", page); 2820 return ret; 2821 } 2822 new_state = (int)tmp; 2823 2824 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) { 2825 pr_err("Unable to process implicit configfs ALUA" 2826 " transition while TPGS_IMPLICIT_ALUA is disabled\n"); 2827 return -EINVAL; 2828 } 2829 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA && 2830 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) { 2831 /* LBA DEPENDENT is only allowed with implicit ALUA */ 2832 pr_err("Unable to process implicit configfs ALUA transition" 2833 " while explicit ALUA management is enabled\n"); 2834 return -EINVAL; 2835 } 2836 2837 ret = core_alua_do_port_transition(tg_pt_gp, dev, 2838 NULL, NULL, new_state, 0); 2839 return (!ret) ? count : -EINVAL; 2840 } 2841 2842 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item, 2843 char *page) 2844 { 2845 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2846 return sprintf(page, "%s\n", 2847 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2848 } 2849 2850 static ssize_t target_tg_pt_gp_alua_access_status_store( 2851 struct config_item *item, const char *page, size_t count) 2852 { 2853 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2854 unsigned long tmp; 2855 int new_status, ret; 2856 2857 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2858 pr_err("Unable to set ALUA access status on invalid tg_pt_gp ID\n"); 2859 return -EINVAL; 2860 } 2861 2862 ret = kstrtoul(page, 0, &tmp); 2863 if (ret < 0) { 2864 pr_err("Unable to extract new ALUA access status" 2865 " from %s\n", page); 2866 return ret; 2867 } 2868 new_status = (int)tmp; 2869 2870 if ((new_status != ALUA_STATUS_NONE) && 2871 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && 2872 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { 2873 pr_err("Illegal ALUA access status: 0x%02x\n", 2874 new_status); 2875 return -EINVAL; 2876 } 2877 2878 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2879 return count; 2880 } 2881 2882 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item, 2883 char *page) 2884 { 2885 return core_alua_show_access_type(to_tg_pt_gp(item), page); 2886 } 2887 2888 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item, 2889 const char *page, size_t count) 2890 { 2891 return core_alua_store_access_type(to_tg_pt_gp(item), page, count); 2892 } 2893 2894 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \ 2895 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \ 2896 struct config_item *item, char *p) \ 2897 { \ 2898 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 2899 return sprintf(p, "%d\n", \ 2900 !!(t->tg_pt_gp_alua_supported_states & _bit)); \ 2901 } \ 2902 \ 2903 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \ 2904 struct config_item *item, const char *p, size_t c) \ 2905 { \ 2906 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 2907 unsigned long tmp; \ 2908 int ret; \ 2909 \ 2910 if (!t->tg_pt_gp_valid_id) { \ 2911 pr_err("Unable to set " #_name " ALUA state on invalid tg_pt_gp ID\n"); \ 2912 return -EINVAL; \ 2913 } \ 2914 \ 2915 ret = kstrtoul(p, 0, &tmp); \ 2916 if (ret < 0) { \ 2917 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \ 2918 return -EINVAL; \ 2919 } \ 2920 if (tmp > 1) { \ 2921 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \ 2922 return -EINVAL; \ 2923 } \ 2924 if (tmp) \ 2925 t->tg_pt_gp_alua_supported_states |= _bit; \ 2926 else \ 2927 t->tg_pt_gp_alua_supported_states &= ~_bit; \ 2928 \ 2929 return c; \ 2930 } 2931 2932 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP); 2933 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP); 2934 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP); 2935 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP); 2936 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP); 2937 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP); 2938 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP); 2939 2940 static ssize_t target_tg_pt_gp_alua_write_metadata_show( 2941 struct config_item *item, char *page) 2942 { 2943 return sprintf(page, "%d\n", 2944 to_tg_pt_gp(item)->tg_pt_gp_write_metadata); 2945 } 2946 2947 static ssize_t target_tg_pt_gp_alua_write_metadata_store( 2948 struct config_item *item, const char *page, size_t count) 2949 { 2950 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2951 unsigned long tmp; 2952 int ret; 2953 2954 ret = kstrtoul(page, 0, &tmp); 2955 if (ret < 0) { 2956 pr_err("Unable to extract alua_write_metadata\n"); 2957 return ret; 2958 } 2959 2960 if ((tmp != 0) && (tmp != 1)) { 2961 pr_err("Illegal value for alua_write_metadata:" 2962 " %lu\n", tmp); 2963 return -EINVAL; 2964 } 2965 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 2966 2967 return count; 2968 } 2969 2970 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item, 2971 char *page) 2972 { 2973 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page); 2974 } 2975 2976 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item, 2977 const char *page, size_t count) 2978 { 2979 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page, 2980 count); 2981 } 2982 2983 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item, 2984 char *page) 2985 { 2986 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page); 2987 } 2988 2989 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item, 2990 const char *page, size_t count) 2991 { 2992 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page, 2993 count); 2994 } 2995 2996 static ssize_t target_tg_pt_gp_implicit_trans_secs_show( 2997 struct config_item *item, char *page) 2998 { 2999 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page); 3000 } 3001 3002 static ssize_t target_tg_pt_gp_implicit_trans_secs_store( 3003 struct config_item *item, const char *page, size_t count) 3004 { 3005 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page, 3006 count); 3007 } 3008 3009 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item, 3010 char *page) 3011 { 3012 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page); 3013 } 3014 3015 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item, 3016 const char *page, size_t count) 3017 { 3018 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count); 3019 } 3020 3021 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item, 3022 char *page) 3023 { 3024 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3025 3026 if (!tg_pt_gp->tg_pt_gp_valid_id) 3027 return 0; 3028 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 3029 } 3030 3031 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item, 3032 const char *page, size_t count) 3033 { 3034 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3035 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 3036 unsigned long tg_pt_gp_id; 3037 int ret; 3038 3039 ret = kstrtoul(page, 0, &tg_pt_gp_id); 3040 if (ret < 0) { 3041 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n", 3042 page); 3043 return ret; 3044 } 3045 if (tg_pt_gp_id > 0x0000ffff) { 3046 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n", 3047 tg_pt_gp_id); 3048 return -EINVAL; 3049 } 3050 3051 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 3052 if (ret < 0) 3053 return -EINVAL; 3054 3055 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 3056 "core/alua/tg_pt_gps/%s to ID: %hu\n", 3057 config_item_name(&alua_tg_pt_gp_cg->cg_item), 3058 tg_pt_gp->tg_pt_gp_id); 3059 3060 return count; 3061 } 3062 3063 static ssize_t target_tg_pt_gp_members_show(struct config_item *item, 3064 char *page) 3065 { 3066 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3067 struct se_lun *lun; 3068 ssize_t len = 0, cur_len; 3069 unsigned char buf[TG_PT_GROUP_NAME_BUF] = { }; 3070 3071 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 3072 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, 3073 lun_tg_pt_gp_link) { 3074 struct se_portal_group *tpg = lun->lun_tpg; 3075 3076 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 3077 "/%s\n", tpg->se_tpg_tfo->fabric_name, 3078 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 3079 tpg->se_tpg_tfo->tpg_get_tag(tpg), 3080 config_item_name(&lun->lun_group.cg_item)); 3081 cur_len++; /* Extra byte for NULL terminator */ 3082 3083 if ((cur_len + len) > PAGE_SIZE) { 3084 pr_warn("Ran out of lu_gp_show_attr" 3085 "_members buffer\n"); 3086 break; 3087 } 3088 memcpy(page+len, buf, cur_len); 3089 len += cur_len; 3090 } 3091 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 3092 3093 return len; 3094 } 3095 3096 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state); 3097 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status); 3098 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type); 3099 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning); 3100 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline); 3101 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent); 3102 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable); 3103 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby); 3104 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized); 3105 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized); 3106 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata); 3107 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs); 3108 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs); 3109 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs); 3110 CONFIGFS_ATTR(target_tg_pt_gp_, preferred); 3111 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id); 3112 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members); 3113 3114 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 3115 &target_tg_pt_gp_attr_alua_access_state, 3116 &target_tg_pt_gp_attr_alua_access_status, 3117 &target_tg_pt_gp_attr_alua_access_type, 3118 &target_tg_pt_gp_attr_alua_support_transitioning, 3119 &target_tg_pt_gp_attr_alua_support_offline, 3120 &target_tg_pt_gp_attr_alua_support_lba_dependent, 3121 &target_tg_pt_gp_attr_alua_support_unavailable, 3122 &target_tg_pt_gp_attr_alua_support_standby, 3123 &target_tg_pt_gp_attr_alua_support_active_nonoptimized, 3124 &target_tg_pt_gp_attr_alua_support_active_optimized, 3125 &target_tg_pt_gp_attr_alua_write_metadata, 3126 &target_tg_pt_gp_attr_nonop_delay_msecs, 3127 &target_tg_pt_gp_attr_trans_delay_msecs, 3128 &target_tg_pt_gp_attr_implicit_trans_secs, 3129 &target_tg_pt_gp_attr_preferred, 3130 &target_tg_pt_gp_attr_tg_pt_gp_id, 3131 &target_tg_pt_gp_attr_members, 3132 NULL, 3133 }; 3134 3135 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 3136 { 3137 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3138 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3139 3140 core_alua_free_tg_pt_gp(tg_pt_gp); 3141 } 3142 3143 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 3144 .release = target_core_alua_tg_pt_gp_release, 3145 }; 3146 3147 static const struct config_item_type target_core_alua_tg_pt_gp_cit = { 3148 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 3149 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 3150 .ct_owner = THIS_MODULE, 3151 }; 3152 3153 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 3154 3155 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3156 3157 static struct config_group *target_core_alua_create_tg_pt_gp( 3158 struct config_group *group, 3159 const char *name) 3160 { 3161 struct t10_alua *alua = container_of(group, struct t10_alua, 3162 alua_tg_pt_gps_group); 3163 struct t10_alua_tg_pt_gp *tg_pt_gp; 3164 struct config_group *alua_tg_pt_gp_cg = NULL; 3165 struct config_item *alua_tg_pt_gp_ci = NULL; 3166 3167 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0); 3168 if (!tg_pt_gp) 3169 return NULL; 3170 3171 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 3172 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 3173 3174 config_group_init_type_name(alua_tg_pt_gp_cg, name, 3175 &target_core_alua_tg_pt_gp_cit); 3176 3177 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 3178 " Group: alua/tg_pt_gps/%s\n", 3179 config_item_name(alua_tg_pt_gp_ci)); 3180 3181 return alua_tg_pt_gp_cg; 3182 } 3183 3184 static void target_core_alua_drop_tg_pt_gp( 3185 struct config_group *group, 3186 struct config_item *item) 3187 { 3188 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3189 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3190 3191 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 3192 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 3193 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 3194 /* 3195 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 3196 * -> target_core_alua_tg_pt_gp_release(). 3197 */ 3198 config_item_put(item); 3199 } 3200 3201 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 3202 .make_group = &target_core_alua_create_tg_pt_gp, 3203 .drop_item = &target_core_alua_drop_tg_pt_gp, 3204 }; 3205 3206 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL); 3207 3208 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3209 3210 /* Start functions for struct config_item_type target_core_alua_cit */ 3211 3212 /* 3213 * target_core_alua_cit is a ConfigFS group that lives under 3214 * /sys/kernel/config/target/core/alua. There are default groups 3215 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 3216 * target_core_alua_cit in target_core_init_configfs() below. 3217 */ 3218 static const struct config_item_type target_core_alua_cit = { 3219 .ct_item_ops = NULL, 3220 .ct_attrs = NULL, 3221 .ct_owner = THIS_MODULE, 3222 }; 3223 3224 /* End functions for struct config_item_type target_core_alua_cit */ 3225 3226 /* Start functions for struct config_item_type tb_dev_stat_cit */ 3227 3228 static struct config_group *target_core_stat_mkdir( 3229 struct config_group *group, 3230 const char *name) 3231 { 3232 return ERR_PTR(-ENOSYS); 3233 } 3234 3235 static void target_core_stat_rmdir( 3236 struct config_group *group, 3237 struct config_item *item) 3238 { 3239 return; 3240 } 3241 3242 static struct configfs_group_operations target_core_stat_group_ops = { 3243 .make_group = &target_core_stat_mkdir, 3244 .drop_item = &target_core_stat_rmdir, 3245 }; 3246 3247 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL); 3248 3249 /* End functions for struct config_item_type tb_dev_stat_cit */ 3250 3251 /* Start functions for struct config_item_type target_core_hba_cit */ 3252 3253 static struct config_group *target_core_make_subdev( 3254 struct config_group *group, 3255 const char *name) 3256 { 3257 struct t10_alua_tg_pt_gp *tg_pt_gp; 3258 struct config_item *hba_ci = &group->cg_item; 3259 struct se_hba *hba = item_to_hba(hba_ci); 3260 struct target_backend *tb = hba->backend; 3261 struct se_device *dev; 3262 int errno = -ENOMEM, ret; 3263 3264 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 3265 if (ret) 3266 return ERR_PTR(ret); 3267 3268 dev = target_alloc_device(hba, name); 3269 if (!dev) 3270 goto out_unlock; 3271 3272 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit); 3273 3274 config_group_init_type_name(&dev->dev_action_group, "action", 3275 &tb->tb_dev_action_cit); 3276 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group); 3277 3278 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib", 3279 &tb->tb_dev_attrib_cit); 3280 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group); 3281 3282 config_group_init_type_name(&dev->dev_pr_group, "pr", 3283 &tb->tb_dev_pr_cit); 3284 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group); 3285 3286 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn", 3287 &tb->tb_dev_wwn_cit); 3288 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group, 3289 &dev->dev_group); 3290 3291 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group, 3292 "alua", &tb->tb_dev_alua_tg_pt_gps_cit); 3293 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group, 3294 &dev->dev_group); 3295 3296 config_group_init_type_name(&dev->dev_stat_grps.stat_group, 3297 "statistics", &tb->tb_dev_stat_cit); 3298 configfs_add_default_group(&dev->dev_stat_grps.stat_group, 3299 &dev->dev_group); 3300 3301 /* 3302 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 3303 */ 3304 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1); 3305 if (!tg_pt_gp) 3306 goto out_free_device; 3307 dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 3308 3309 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 3310 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 3311 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group, 3312 &dev->t10_alua.alua_tg_pt_gps_group); 3313 3314 /* 3315 * Add core/$HBA/$DEV/statistics/ default groups 3316 */ 3317 target_stat_setup_dev_default_groups(dev); 3318 3319 mutex_unlock(&hba->hba_access_mutex); 3320 return &dev->dev_group; 3321 3322 out_free_device: 3323 target_free_device(dev); 3324 out_unlock: 3325 mutex_unlock(&hba->hba_access_mutex); 3326 return ERR_PTR(errno); 3327 } 3328 3329 static void target_core_drop_subdev( 3330 struct config_group *group, 3331 struct config_item *item) 3332 { 3333 struct config_group *dev_cg = to_config_group(item); 3334 struct se_device *dev = 3335 container_of(dev_cg, struct se_device, dev_group); 3336 struct se_hba *hba; 3337 3338 hba = item_to_hba(&dev->se_hba->hba_group.cg_item); 3339 3340 mutex_lock(&hba->hba_access_mutex); 3341 3342 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group); 3343 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group); 3344 3345 /* 3346 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 3347 * directly from target_core_alua_tg_pt_gp_release(). 3348 */ 3349 dev->t10_alua.default_tg_pt_gp = NULL; 3350 3351 configfs_remove_default_groups(dev_cg); 3352 3353 /* 3354 * se_dev is released from target_core_dev_item_ops->release() 3355 */ 3356 config_item_put(item); 3357 mutex_unlock(&hba->hba_access_mutex); 3358 } 3359 3360 static struct configfs_group_operations target_core_hba_group_ops = { 3361 .make_group = target_core_make_subdev, 3362 .drop_item = target_core_drop_subdev, 3363 }; 3364 3365 3366 static inline struct se_hba *to_hba(struct config_item *item) 3367 { 3368 return container_of(to_config_group(item), struct se_hba, hba_group); 3369 } 3370 3371 static ssize_t target_hba_info_show(struct config_item *item, char *page) 3372 { 3373 struct se_hba *hba = to_hba(item); 3374 3375 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 3376 hba->hba_id, hba->backend->ops->name, 3377 TARGET_CORE_VERSION); 3378 } 3379 3380 static ssize_t target_hba_mode_show(struct config_item *item, char *page) 3381 { 3382 struct se_hba *hba = to_hba(item); 3383 int hba_mode = 0; 3384 3385 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 3386 hba_mode = 1; 3387 3388 return sprintf(page, "%d\n", hba_mode); 3389 } 3390 3391 static ssize_t target_hba_mode_store(struct config_item *item, 3392 const char *page, size_t count) 3393 { 3394 struct se_hba *hba = to_hba(item); 3395 unsigned long mode_flag; 3396 int ret; 3397 3398 if (hba->backend->ops->pmode_enable_hba == NULL) 3399 return -EINVAL; 3400 3401 ret = kstrtoul(page, 0, &mode_flag); 3402 if (ret < 0) { 3403 pr_err("Unable to extract hba mode flag: %d\n", ret); 3404 return ret; 3405 } 3406 3407 if (hba->dev_count) { 3408 pr_err("Unable to set hba_mode with active devices\n"); 3409 return -EINVAL; 3410 } 3411 3412 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag); 3413 if (ret < 0) 3414 return -EINVAL; 3415 if (ret > 0) 3416 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 3417 else if (ret == 0) 3418 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 3419 3420 return count; 3421 } 3422 3423 CONFIGFS_ATTR_RO(target_, hba_info); 3424 CONFIGFS_ATTR(target_, hba_mode); 3425 3426 static void target_core_hba_release(struct config_item *item) 3427 { 3428 struct se_hba *hba = container_of(to_config_group(item), 3429 struct se_hba, hba_group); 3430 core_delete_hba(hba); 3431 } 3432 3433 static struct configfs_attribute *target_core_hba_attrs[] = { 3434 &target_attr_hba_info, 3435 &target_attr_hba_mode, 3436 NULL, 3437 }; 3438 3439 static struct configfs_item_operations target_core_hba_item_ops = { 3440 .release = target_core_hba_release, 3441 }; 3442 3443 static const struct config_item_type target_core_hba_cit = { 3444 .ct_item_ops = &target_core_hba_item_ops, 3445 .ct_group_ops = &target_core_hba_group_ops, 3446 .ct_attrs = target_core_hba_attrs, 3447 .ct_owner = THIS_MODULE, 3448 }; 3449 3450 static struct config_group *target_core_call_addhbatotarget( 3451 struct config_group *group, 3452 const char *name) 3453 { 3454 char *se_plugin_str, *str, *str2; 3455 struct se_hba *hba; 3456 char buf[TARGET_CORE_NAME_MAX_LEN] = { }; 3457 unsigned long plugin_dep_id = 0; 3458 int ret; 3459 3460 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 3461 pr_err("Passed *name strlen(): %d exceeds" 3462 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 3463 TARGET_CORE_NAME_MAX_LEN); 3464 return ERR_PTR(-ENAMETOOLONG); 3465 } 3466 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 3467 3468 str = strstr(buf, "_"); 3469 if (!str) { 3470 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 3471 return ERR_PTR(-EINVAL); 3472 } 3473 se_plugin_str = buf; 3474 /* 3475 * Special case for subsystem plugins that have "_" in their names. 3476 * Namely rd_direct and rd_mcp.. 3477 */ 3478 str2 = strstr(str+1, "_"); 3479 if (str2) { 3480 *str2 = '\0'; /* Terminate for *se_plugin_str */ 3481 str2++; /* Skip to start of plugin dependent ID */ 3482 str = str2; 3483 } else { 3484 *str = '\0'; /* Terminate for *se_plugin_str */ 3485 str++; /* Skip to start of plugin dependent ID */ 3486 } 3487 3488 ret = kstrtoul(str, 0, &plugin_dep_id); 3489 if (ret < 0) { 3490 pr_err("kstrtoul() returned %d for" 3491 " plugin_dep_id\n", ret); 3492 return ERR_PTR(ret); 3493 } 3494 /* 3495 * Load up TCM subsystem plugins if they have not already been loaded. 3496 */ 3497 transport_subsystem_check_init(); 3498 3499 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 3500 if (IS_ERR(hba)) 3501 return ERR_CAST(hba); 3502 3503 config_group_init_type_name(&hba->hba_group, name, 3504 &target_core_hba_cit); 3505 3506 return &hba->hba_group; 3507 } 3508 3509 static void target_core_call_delhbafromtarget( 3510 struct config_group *group, 3511 struct config_item *item) 3512 { 3513 /* 3514 * core_delete_hba() is called from target_core_hba_item_ops->release() 3515 * -> target_core_hba_release() 3516 */ 3517 config_item_put(item); 3518 } 3519 3520 static struct configfs_group_operations target_core_group_ops = { 3521 .make_group = target_core_call_addhbatotarget, 3522 .drop_item = target_core_call_delhbafromtarget, 3523 }; 3524 3525 static const struct config_item_type target_core_cit = { 3526 .ct_item_ops = NULL, 3527 .ct_group_ops = &target_core_group_ops, 3528 .ct_attrs = NULL, 3529 .ct_owner = THIS_MODULE, 3530 }; 3531 3532 /* Stop functions for struct config_item_type target_core_hba_cit */ 3533 3534 void target_setup_backend_cits(struct target_backend *tb) 3535 { 3536 target_core_setup_dev_cit(tb); 3537 target_core_setup_dev_action_cit(tb); 3538 target_core_setup_dev_attrib_cit(tb); 3539 target_core_setup_dev_pr_cit(tb); 3540 target_core_setup_dev_wwn_cit(tb); 3541 target_core_setup_dev_alua_tg_pt_gps_cit(tb); 3542 target_core_setup_dev_stat_cit(tb); 3543 } 3544 3545 static void target_init_dbroot(void) 3546 { 3547 struct file *fp; 3548 3549 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED); 3550 fp = filp_open(db_root_stage, O_RDONLY, 0); 3551 if (IS_ERR(fp)) { 3552 pr_err("db_root: cannot open: %s\n", db_root_stage); 3553 return; 3554 } 3555 if (!S_ISDIR(file_inode(fp)->i_mode)) { 3556 filp_close(fp, NULL); 3557 pr_err("db_root: not a valid directory: %s\n", db_root_stage); 3558 return; 3559 } 3560 filp_close(fp, NULL); 3561 3562 strncpy(db_root, db_root_stage, DB_ROOT_LEN); 3563 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); 3564 } 3565 3566 static int __init target_core_init_configfs(void) 3567 { 3568 struct configfs_subsystem *subsys = &target_core_fabrics; 3569 struct t10_alua_lu_gp *lu_gp; 3570 int ret; 3571 3572 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 3573 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3574 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3575 3576 config_group_init(&subsys->su_group); 3577 mutex_init(&subsys->su_mutex); 3578 3579 ret = init_se_kmem_caches(); 3580 if (ret < 0) 3581 return ret; 3582 /* 3583 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3584 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3585 */ 3586 config_group_init_type_name(&target_core_hbagroup, "core", 3587 &target_core_cit); 3588 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group); 3589 3590 /* 3591 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3592 */ 3593 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit); 3594 configfs_add_default_group(&alua_group, &target_core_hbagroup); 3595 3596 /* 3597 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3598 * groups under /sys/kernel/config/target/core/alua/ 3599 */ 3600 config_group_init_type_name(&alua_lu_gps_group, "lu_gps", 3601 &target_core_alua_lu_gps_cit); 3602 configfs_add_default_group(&alua_lu_gps_group, &alua_group); 3603 3604 /* 3605 * Add core/alua/lu_gps/default_lu_gp 3606 */ 3607 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3608 if (IS_ERR(lu_gp)) { 3609 ret = -ENOMEM; 3610 goto out_global; 3611 } 3612 3613 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3614 &target_core_alua_lu_gp_cit); 3615 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group); 3616 3617 default_lu_gp = lu_gp; 3618 3619 /* 3620 * Register the target_core_mod subsystem with configfs. 3621 */ 3622 ret = configfs_register_subsystem(subsys); 3623 if (ret < 0) { 3624 pr_err("Error %d while registering subsystem %s\n", 3625 ret, subsys->su_group.cg_item.ci_namebuf); 3626 goto out_global; 3627 } 3628 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 3629 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s" 3630 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3631 /* 3632 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3633 */ 3634 ret = rd_module_init(); 3635 if (ret < 0) 3636 goto out; 3637 3638 ret = core_dev_setup_virtual_lun0(); 3639 if (ret < 0) 3640 goto out; 3641 3642 ret = target_xcopy_setup_pt(); 3643 if (ret < 0) 3644 goto out; 3645 3646 target_init_dbroot(); 3647 3648 return 0; 3649 3650 out: 3651 configfs_unregister_subsystem(subsys); 3652 core_dev_release_virtual_lun0(); 3653 rd_module_exit(); 3654 out_global: 3655 if (default_lu_gp) { 3656 core_alua_free_lu_gp(default_lu_gp); 3657 default_lu_gp = NULL; 3658 } 3659 release_se_kmem_caches(); 3660 return ret; 3661 } 3662 3663 static void __exit target_core_exit_configfs(void) 3664 { 3665 configfs_remove_default_groups(&alua_lu_gps_group); 3666 configfs_remove_default_groups(&alua_group); 3667 configfs_remove_default_groups(&target_core_hbagroup); 3668 3669 /* 3670 * We expect subsys->su_group.default_groups to be released 3671 * by configfs subsystem provider logic.. 3672 */ 3673 configfs_unregister_subsystem(&target_core_fabrics); 3674 3675 core_alua_free_lu_gp(default_lu_gp); 3676 default_lu_gp = NULL; 3677 3678 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3679 " Infrastructure\n"); 3680 3681 core_dev_release_virtual_lun0(); 3682 rd_module_exit(); 3683 target_xcopy_release_pt(); 3684 release_se_kmem_caches(); 3685 } 3686 3687 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3688 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3689 MODULE_LICENSE("GPL"); 3690 3691 module_init(target_core_init_configfs); 3692 module_exit(target_core_exit_configfs); 3693