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