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