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