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