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