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(unmap_zeroes_data); 503 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len); 504 505 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \ 506 static ssize_t _name##_store(struct config_item *item, const char *page,\ 507 size_t count) \ 508 { \ 509 struct se_dev_attrib *da = to_attrib(item); \ 510 u32 val; \ 511 int ret; \ 512 \ 513 ret = kstrtou32(page, 0, &val); \ 514 if (ret < 0) \ 515 return ret; \ 516 da->_name = val; \ 517 return count; \ 518 } 519 520 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count); 521 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count); 522 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity); 523 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment); 524 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len); 525 526 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \ 527 static ssize_t _name##_store(struct config_item *item, const char *page, \ 528 size_t count) \ 529 { \ 530 struct se_dev_attrib *da = to_attrib(item); \ 531 bool flag; \ 532 int ret; \ 533 \ 534 ret = strtobool(page, &flag); \ 535 if (ret < 0) \ 536 return ret; \ 537 da->_name = flag; \ 538 return count; \ 539 } 540 541 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write); 542 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw); 543 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc); 544 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids); 545 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot); 546 547 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \ 548 static ssize_t _name##_store(struct config_item *item, const char *page,\ 549 size_t count) \ 550 { \ 551 printk_once(KERN_WARNING \ 552 "ignoring deprecated %s attribute\n", \ 553 __stringify(_name)); \ 554 return count; \ 555 } 556 557 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo); 558 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read); 559 560 static void dev_set_t10_wwn_model_alias(struct se_device *dev) 561 { 562 const char *configname; 563 564 configname = config_item_name(&dev->dev_group.cg_item); 565 if (strlen(configname) >= 16) { 566 pr_warn("dev[%p]: Backstore name '%s' is too long for " 567 "INQUIRY_MODEL, truncating to 16 bytes\n", dev, 568 configname); 569 } 570 snprintf(&dev->t10_wwn.model[0], 16, "%s", configname); 571 } 572 573 static ssize_t emulate_model_alias_store(struct config_item *item, 574 const char *page, size_t count) 575 { 576 struct se_dev_attrib *da = to_attrib(item); 577 struct se_device *dev = da->da_dev; 578 bool flag; 579 int ret; 580 581 if (dev->export_count) { 582 pr_err("dev[%p]: Unable to change model alias" 583 " while export_count is %d\n", 584 dev, dev->export_count); 585 return -EINVAL; 586 } 587 588 ret = strtobool(page, &flag); 589 if (ret < 0) 590 return ret; 591 592 if (flag) { 593 dev_set_t10_wwn_model_alias(dev); 594 } else { 595 strncpy(&dev->t10_wwn.model[0], 596 dev->transport->inquiry_prod, 16); 597 } 598 da->emulate_model_alias = flag; 599 return count; 600 } 601 602 static ssize_t emulate_write_cache_store(struct config_item *item, 603 const char *page, size_t count) 604 { 605 struct se_dev_attrib *da = to_attrib(item); 606 bool flag; 607 int ret; 608 609 ret = strtobool(page, &flag); 610 if (ret < 0) 611 return ret; 612 613 if (flag && da->da_dev->transport->get_write_cache) { 614 pr_err("emulate_write_cache not supported for this device\n"); 615 return -EINVAL; 616 } 617 618 da->emulate_write_cache = flag; 619 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 620 da->da_dev, flag); 621 return count; 622 } 623 624 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item, 625 const char *page, size_t count) 626 { 627 struct se_dev_attrib *da = to_attrib(item); 628 u32 val; 629 int ret; 630 631 ret = kstrtou32(page, 0, &val); 632 if (ret < 0) 633 return ret; 634 635 if (val != 0 && val != 1 && val != 2) { 636 pr_err("Illegal value %d\n", val); 637 return -EINVAL; 638 } 639 640 if (da->da_dev->export_count) { 641 pr_err("dev[%p]: Unable to change SE Device" 642 " UA_INTRLCK_CTRL while export_count is %d\n", 643 da->da_dev, da->da_dev->export_count); 644 return -EINVAL; 645 } 646 da->emulate_ua_intlck_ctrl = val; 647 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 648 da->da_dev, val); 649 return count; 650 } 651 652 static ssize_t emulate_tas_store(struct config_item *item, 653 const char *page, size_t count) 654 { 655 struct se_dev_attrib *da = to_attrib(item); 656 bool flag; 657 int ret; 658 659 ret = strtobool(page, &flag); 660 if (ret < 0) 661 return ret; 662 663 if (da->da_dev->export_count) { 664 pr_err("dev[%p]: Unable to change SE Device TAS while" 665 " export_count is %d\n", 666 da->da_dev, da->da_dev->export_count); 667 return -EINVAL; 668 } 669 da->emulate_tas = flag; 670 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 671 da->da_dev, flag ? "Enabled" : "Disabled"); 672 673 return count; 674 } 675 676 static ssize_t emulate_tpu_store(struct config_item *item, 677 const char *page, size_t count) 678 { 679 struct se_dev_attrib *da = to_attrib(item); 680 bool flag; 681 int ret; 682 683 ret = strtobool(page, &flag); 684 if (ret < 0) 685 return ret; 686 687 /* 688 * We expect this value to be non-zero when generic Block Layer 689 * Discard supported is detected iblock_create_virtdevice(). 690 */ 691 if (flag && !da->max_unmap_block_desc_count) { 692 pr_err("Generic Block Discard not supported\n"); 693 return -ENOSYS; 694 } 695 696 da->emulate_tpu = flag; 697 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 698 da->da_dev, flag); 699 return count; 700 } 701 702 static ssize_t emulate_tpws_store(struct config_item *item, 703 const char *page, size_t count) 704 { 705 struct se_dev_attrib *da = to_attrib(item); 706 bool flag; 707 int ret; 708 709 ret = strtobool(page, &flag); 710 if (ret < 0) 711 return ret; 712 713 /* 714 * We expect this value to be non-zero when generic Block Layer 715 * Discard supported is detected iblock_create_virtdevice(). 716 */ 717 if (flag && !da->max_unmap_block_desc_count) { 718 pr_err("Generic Block Discard not supported\n"); 719 return -ENOSYS; 720 } 721 722 da->emulate_tpws = flag; 723 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 724 da->da_dev, flag); 725 return count; 726 } 727 728 static ssize_t pi_prot_type_store(struct config_item *item, 729 const char *page, size_t count) 730 { 731 struct se_dev_attrib *da = to_attrib(item); 732 int old_prot = da->pi_prot_type, ret; 733 struct se_device *dev = da->da_dev; 734 u32 flag; 735 736 ret = kstrtou32(page, 0, &flag); 737 if (ret < 0) 738 return ret; 739 740 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) { 741 pr_err("Illegal value %d for pi_prot_type\n", flag); 742 return -EINVAL; 743 } 744 if (flag == 2) { 745 pr_err("DIF TYPE2 protection currently not supported\n"); 746 return -ENOSYS; 747 } 748 if (da->hw_pi_prot_type) { 749 pr_warn("DIF protection enabled on underlying hardware," 750 " ignoring\n"); 751 return count; 752 } 753 if (!dev->transport->init_prot || !dev->transport->free_prot) { 754 /* 0 is only allowed value for non-supporting backends */ 755 if (flag == 0) 756 return count; 757 758 pr_err("DIF protection not supported by backend: %s\n", 759 dev->transport->name); 760 return -ENOSYS; 761 } 762 if (!(dev->dev_flags & DF_CONFIGURED)) { 763 pr_err("DIF protection requires device to be configured\n"); 764 return -ENODEV; 765 } 766 if (dev->export_count) { 767 pr_err("dev[%p]: Unable to change SE Device PROT type while" 768 " export_count is %d\n", dev, dev->export_count); 769 return -EINVAL; 770 } 771 772 da->pi_prot_type = flag; 773 774 if (flag && !old_prot) { 775 ret = dev->transport->init_prot(dev); 776 if (ret) { 777 da->pi_prot_type = old_prot; 778 return ret; 779 } 780 781 } else if (!flag && old_prot) { 782 dev->transport->free_prot(dev); 783 } 784 785 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag); 786 return count; 787 } 788 789 static ssize_t pi_prot_format_store(struct config_item *item, 790 const char *page, size_t count) 791 { 792 struct se_dev_attrib *da = to_attrib(item); 793 struct se_device *dev = da->da_dev; 794 bool flag; 795 int ret; 796 797 ret = strtobool(page, &flag); 798 if (ret < 0) 799 return ret; 800 801 if (!flag) 802 return count; 803 804 if (!dev->transport->format_prot) { 805 pr_err("DIF protection format not supported by backend %s\n", 806 dev->transport->name); 807 return -ENOSYS; 808 } 809 if (!(dev->dev_flags & DF_CONFIGURED)) { 810 pr_err("DIF protection format requires device to be configured\n"); 811 return -ENODEV; 812 } 813 if (dev->export_count) { 814 pr_err("dev[%p]: Unable to format SE Device PROT type while" 815 " export_count is %d\n", dev, dev->export_count); 816 return -EINVAL; 817 } 818 819 ret = dev->transport->format_prot(dev); 820 if (ret) 821 return ret; 822 823 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev); 824 return count; 825 } 826 827 static ssize_t force_pr_aptpl_store(struct config_item *item, 828 const char *page, size_t count) 829 { 830 struct se_dev_attrib *da = to_attrib(item); 831 bool flag; 832 int ret; 833 834 ret = strtobool(page, &flag); 835 if (ret < 0) 836 return ret; 837 if (da->da_dev->export_count) { 838 pr_err("dev[%p]: Unable to set force_pr_aptpl while" 839 " export_count is %d\n", 840 da->da_dev, da->da_dev->export_count); 841 return -EINVAL; 842 } 843 844 da->force_pr_aptpl = flag; 845 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag); 846 return count; 847 } 848 849 static ssize_t emulate_rest_reord_store(struct config_item *item, 850 const char *page, size_t count) 851 { 852 struct se_dev_attrib *da = to_attrib(item); 853 bool flag; 854 int ret; 855 856 ret = strtobool(page, &flag); 857 if (ret < 0) 858 return ret; 859 860 if (flag != 0) { 861 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted" 862 " reordering not implemented\n", da->da_dev); 863 return -ENOSYS; 864 } 865 da->emulate_rest_reord = flag; 866 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", 867 da->da_dev, flag); 868 return count; 869 } 870 871 static ssize_t unmap_zeroes_data_store(struct config_item *item, 872 const char *page, size_t count) 873 { 874 struct se_dev_attrib *da = to_attrib(item); 875 bool flag; 876 int ret; 877 878 ret = strtobool(page, &flag); 879 if (ret < 0) 880 return ret; 881 882 if (da->da_dev->export_count) { 883 pr_err("dev[%p]: Unable to change SE Device" 884 " unmap_zeroes_data while export_count is %d\n", 885 da->da_dev, da->da_dev->export_count); 886 return -EINVAL; 887 } 888 /* 889 * We expect this value to be non-zero when generic Block Layer 890 * Discard supported is detected iblock_configure_device(). 891 */ 892 if (flag && !da->max_unmap_block_desc_count) { 893 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set" 894 " because max_unmap_block_desc_count is zero\n", 895 da->da_dev); 896 return -ENOSYS; 897 } 898 da->unmap_zeroes_data = flag; 899 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n", 900 da->da_dev, flag); 901 return 0; 902 } 903 904 /* 905 * Note, this can only be called on unexported SE Device Object. 906 */ 907 static ssize_t queue_depth_store(struct config_item *item, 908 const char *page, size_t count) 909 { 910 struct se_dev_attrib *da = to_attrib(item); 911 struct se_device *dev = da->da_dev; 912 u32 val; 913 int ret; 914 915 ret = kstrtou32(page, 0, &val); 916 if (ret < 0) 917 return ret; 918 919 if (dev->export_count) { 920 pr_err("dev[%p]: Unable to change SE Device TCQ while" 921 " export_count is %d\n", 922 dev, dev->export_count); 923 return -EINVAL; 924 } 925 if (!val) { 926 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev); 927 return -EINVAL; 928 } 929 930 if (val > dev->dev_attrib.queue_depth) { 931 if (val > dev->dev_attrib.hw_queue_depth) { 932 pr_err("dev[%p]: Passed queue_depth:" 933 " %u exceeds TCM/SE_Device MAX" 934 " TCQ: %u\n", dev, val, 935 dev->dev_attrib.hw_queue_depth); 936 return -EINVAL; 937 } 938 } 939 da->queue_depth = dev->queue_depth = val; 940 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val); 941 return count; 942 } 943 944 static ssize_t optimal_sectors_store(struct config_item *item, 945 const char *page, size_t count) 946 { 947 struct se_dev_attrib *da = to_attrib(item); 948 u32 val; 949 int ret; 950 951 ret = kstrtou32(page, 0, &val); 952 if (ret < 0) 953 return ret; 954 955 if (da->da_dev->export_count) { 956 pr_err("dev[%p]: Unable to change SE Device" 957 " optimal_sectors while export_count is %d\n", 958 da->da_dev, da->da_dev->export_count); 959 return -EINVAL; 960 } 961 if (val > da->hw_max_sectors) { 962 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 963 " greater than hw_max_sectors: %u\n", 964 da->da_dev, val, da->hw_max_sectors); 965 return -EINVAL; 966 } 967 968 da->optimal_sectors = val; 969 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 970 da->da_dev, val); 971 return count; 972 } 973 974 static ssize_t block_size_store(struct config_item *item, 975 const char *page, size_t count) 976 { 977 struct se_dev_attrib *da = to_attrib(item); 978 u32 val; 979 int ret; 980 981 ret = kstrtou32(page, 0, &val); 982 if (ret < 0) 983 return ret; 984 985 if (da->da_dev->export_count) { 986 pr_err("dev[%p]: Unable to change SE Device block_size" 987 " while export_count is %d\n", 988 da->da_dev, da->da_dev->export_count); 989 return -EINVAL; 990 } 991 992 if (val != 512 && val != 1024 && val != 2048 && val != 4096) { 993 pr_err("dev[%p]: Illegal value for block_device: %u" 994 " for SE device, must be 512, 1024, 2048 or 4096\n", 995 da->da_dev, val); 996 return -EINVAL; 997 } 998 999 da->block_size = val; 1000 if (da->max_bytes_per_io) 1001 da->hw_max_sectors = da->max_bytes_per_io / val; 1002 1003 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1004 da->da_dev, val); 1005 return count; 1006 } 1007 1008 CONFIGFS_ATTR(, emulate_model_alias); 1009 CONFIGFS_ATTR(, emulate_dpo); 1010 CONFIGFS_ATTR(, emulate_fua_write); 1011 CONFIGFS_ATTR(, emulate_fua_read); 1012 CONFIGFS_ATTR(, emulate_write_cache); 1013 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl); 1014 CONFIGFS_ATTR(, emulate_tas); 1015 CONFIGFS_ATTR(, emulate_tpu); 1016 CONFIGFS_ATTR(, emulate_tpws); 1017 CONFIGFS_ATTR(, emulate_caw); 1018 CONFIGFS_ATTR(, emulate_3pc); 1019 CONFIGFS_ATTR(, pi_prot_type); 1020 CONFIGFS_ATTR_RO(, hw_pi_prot_type); 1021 CONFIGFS_ATTR(, pi_prot_format); 1022 CONFIGFS_ATTR(, enforce_pr_isids); 1023 CONFIGFS_ATTR(, is_nonrot); 1024 CONFIGFS_ATTR(, emulate_rest_reord); 1025 CONFIGFS_ATTR(, force_pr_aptpl); 1026 CONFIGFS_ATTR_RO(, hw_block_size); 1027 CONFIGFS_ATTR(, block_size); 1028 CONFIGFS_ATTR_RO(, hw_max_sectors); 1029 CONFIGFS_ATTR(, optimal_sectors); 1030 CONFIGFS_ATTR_RO(, hw_queue_depth); 1031 CONFIGFS_ATTR(, queue_depth); 1032 CONFIGFS_ATTR(, max_unmap_lba_count); 1033 CONFIGFS_ATTR(, max_unmap_block_desc_count); 1034 CONFIGFS_ATTR(, unmap_granularity); 1035 CONFIGFS_ATTR(, unmap_granularity_alignment); 1036 CONFIGFS_ATTR(, unmap_zeroes_data); 1037 CONFIGFS_ATTR(, max_write_same_len); 1038 1039 /* 1040 * dev_attrib attributes for devices using the target core SBC/SPC 1041 * interpreter. Any backend using spc_parse_cdb should be using 1042 * these. 1043 */ 1044 struct configfs_attribute *sbc_attrib_attrs[] = { 1045 &attr_emulate_model_alias, 1046 &attr_emulate_dpo, 1047 &attr_emulate_fua_write, 1048 &attr_emulate_fua_read, 1049 &attr_emulate_write_cache, 1050 &attr_emulate_ua_intlck_ctrl, 1051 &attr_emulate_tas, 1052 &attr_emulate_tpu, 1053 &attr_emulate_tpws, 1054 &attr_emulate_caw, 1055 &attr_emulate_3pc, 1056 &attr_pi_prot_type, 1057 &attr_hw_pi_prot_type, 1058 &attr_pi_prot_format, 1059 &attr_enforce_pr_isids, 1060 &attr_is_nonrot, 1061 &attr_emulate_rest_reord, 1062 &attr_force_pr_aptpl, 1063 &attr_hw_block_size, 1064 &attr_block_size, 1065 &attr_hw_max_sectors, 1066 &attr_optimal_sectors, 1067 &attr_hw_queue_depth, 1068 &attr_queue_depth, 1069 &attr_max_unmap_lba_count, 1070 &attr_max_unmap_block_desc_count, 1071 &attr_unmap_granularity, 1072 &attr_unmap_granularity_alignment, 1073 &attr_unmap_zeroes_data, 1074 &attr_max_write_same_len, 1075 NULL, 1076 }; 1077 EXPORT_SYMBOL(sbc_attrib_attrs); 1078 1079 /* 1080 * Minimal dev_attrib attributes for devices passing through CDBs. 1081 * In this case we only provide a few read-only attributes for 1082 * backwards compatibility. 1083 */ 1084 struct configfs_attribute *passthrough_attrib_attrs[] = { 1085 &attr_hw_pi_prot_type, 1086 &attr_hw_block_size, 1087 &attr_hw_max_sectors, 1088 &attr_hw_queue_depth, 1089 NULL, 1090 }; 1091 EXPORT_SYMBOL(passthrough_attrib_attrs); 1092 1093 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL); 1094 1095 /* End functions for struct config_item_type tb_dev_attrib_cit */ 1096 1097 /* Start functions for struct config_item_type tb_dev_wwn_cit */ 1098 1099 static struct t10_wwn *to_t10_wwn(struct config_item *item) 1100 { 1101 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group); 1102 } 1103 1104 /* 1105 * VPD page 0x80 Unit serial 1106 */ 1107 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item, 1108 char *page) 1109 { 1110 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 1111 &to_t10_wwn(item)->unit_serial[0]); 1112 } 1113 1114 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item, 1115 const char *page, size_t count) 1116 { 1117 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1118 struct se_device *dev = t10_wwn->t10_dev; 1119 unsigned char buf[INQUIRY_VPD_SERIAL_LEN]; 1120 1121 /* 1122 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 1123 * from the struct scsi_device level firmware, do not allow 1124 * VPD Unit Serial to be emulated. 1125 * 1126 * Note this struct scsi_device could also be emulating VPD 1127 * information from its drivers/scsi LLD. But for now we assume 1128 * it is doing 'the right thing' wrt a world wide unique 1129 * VPD Unit Serial Number that OS dependent multipath can depend on. 1130 */ 1131 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) { 1132 pr_err("Underlying SCSI device firmware provided VPD" 1133 " Unit Serial, ignoring request\n"); 1134 return -EOPNOTSUPP; 1135 } 1136 1137 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 1138 pr_err("Emulated VPD Unit Serial exceeds" 1139 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 1140 return -EOVERFLOW; 1141 } 1142 /* 1143 * Check to see if any active $FABRIC_MOD exports exist. If they 1144 * do exist, fail here as changing this information on the fly 1145 * (underneath the initiator side OS dependent multipath code) 1146 * could cause negative effects. 1147 */ 1148 if (dev->export_count) { 1149 pr_err("Unable to set VPD Unit Serial while" 1150 " active %d $FABRIC_MOD exports exist\n", 1151 dev->export_count); 1152 return -EINVAL; 1153 } 1154 1155 /* 1156 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 1157 * 1158 * Also, strip any newline added from the userspace 1159 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 1160 */ 1161 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN); 1162 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 1163 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 1164 "%s", strstrip(buf)); 1165 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL; 1166 1167 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 1168 " %s\n", dev->t10_wwn.unit_serial); 1169 1170 return count; 1171 } 1172 1173 /* 1174 * VPD page 0x83 Protocol Identifier 1175 */ 1176 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item, 1177 char *page) 1178 { 1179 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1180 struct t10_vpd *vpd; 1181 unsigned char buf[VPD_TMP_BUF_SIZE]; 1182 ssize_t len = 0; 1183 1184 memset(buf, 0, VPD_TMP_BUF_SIZE); 1185 1186 spin_lock(&t10_wwn->t10_vpd_lock); 1187 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 1188 if (!vpd->protocol_identifier_set) 1189 continue; 1190 1191 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 1192 1193 if (len + strlen(buf) >= PAGE_SIZE) 1194 break; 1195 1196 len += sprintf(page+len, "%s", buf); 1197 } 1198 spin_unlock(&t10_wwn->t10_vpd_lock); 1199 1200 return len; 1201 } 1202 1203 /* 1204 * Generic wrapper for dumping VPD identifiers by association. 1205 */ 1206 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 1207 static ssize_t target_wwn_##_name##_show(struct config_item *item, \ 1208 char *page) \ 1209 { \ 1210 struct t10_wwn *t10_wwn = to_t10_wwn(item); \ 1211 struct t10_vpd *vpd; \ 1212 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 1213 ssize_t len = 0; \ 1214 \ 1215 spin_lock(&t10_wwn->t10_vpd_lock); \ 1216 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 1217 if (vpd->association != _assoc) \ 1218 continue; \ 1219 \ 1220 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1221 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 1222 if (len + strlen(buf) >= PAGE_SIZE) \ 1223 break; \ 1224 len += sprintf(page+len, "%s", buf); \ 1225 \ 1226 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1227 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 1228 if (len + strlen(buf) >= PAGE_SIZE) \ 1229 break; \ 1230 len += sprintf(page+len, "%s", buf); \ 1231 \ 1232 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1233 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 1234 if (len + strlen(buf) >= PAGE_SIZE) \ 1235 break; \ 1236 len += sprintf(page+len, "%s", buf); \ 1237 } \ 1238 spin_unlock(&t10_wwn->t10_vpd_lock); \ 1239 \ 1240 return len; \ 1241 } 1242 1243 /* VPD page 0x83 Association: Logical Unit */ 1244 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 1245 /* VPD page 0x83 Association: Target Port */ 1246 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 1247 /* VPD page 0x83 Association: SCSI Target Device */ 1248 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 1249 1250 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial); 1251 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier); 1252 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit); 1253 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port); 1254 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device); 1255 1256 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 1257 &target_wwn_attr_vpd_unit_serial, 1258 &target_wwn_attr_vpd_protocol_identifier, 1259 &target_wwn_attr_vpd_assoc_logical_unit, 1260 &target_wwn_attr_vpd_assoc_target_port, 1261 &target_wwn_attr_vpd_assoc_scsi_target_device, 1262 NULL, 1263 }; 1264 1265 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs); 1266 1267 /* End functions for struct config_item_type tb_dev_wwn_cit */ 1268 1269 /* Start functions for struct config_item_type tb_dev_pr_cit */ 1270 1271 static struct se_device *pr_to_dev(struct config_item *item) 1272 { 1273 return container_of(to_config_group(item), struct se_device, 1274 dev_pr_group); 1275 } 1276 1277 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev, 1278 char *page) 1279 { 1280 struct se_node_acl *se_nacl; 1281 struct t10_pr_registration *pr_reg; 1282 char i_buf[PR_REG_ISID_ID_LEN]; 1283 1284 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1285 1286 pr_reg = dev->dev_pr_res_holder; 1287 if (!pr_reg) 1288 return sprintf(page, "No SPC-3 Reservation holder\n"); 1289 1290 se_nacl = pr_reg->pr_reg_nacl; 1291 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1292 1293 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", 1294 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 1295 se_nacl->initiatorname, i_buf); 1296 } 1297 1298 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, 1299 char *page) 1300 { 1301 struct se_node_acl *se_nacl; 1302 ssize_t len; 1303 1304 se_nacl = dev->dev_reserved_node_acl; 1305 if (se_nacl) { 1306 len = sprintf(page, 1307 "SPC-2 Reservation: %s Initiator: %s\n", 1308 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 1309 se_nacl->initiatorname); 1310 } else { 1311 len = sprintf(page, "No SPC-2 Reservation holder\n"); 1312 } 1313 return len; 1314 } 1315 1316 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page) 1317 { 1318 struct se_device *dev = pr_to_dev(item); 1319 int ret; 1320 1321 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) 1322 return sprintf(page, "Passthrough\n"); 1323 1324 spin_lock(&dev->dev_reservation_lock); 1325 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1326 ret = target_core_dev_pr_show_spc2_res(dev, page); 1327 else 1328 ret = target_core_dev_pr_show_spc3_res(dev, page); 1329 spin_unlock(&dev->dev_reservation_lock); 1330 return ret; 1331 } 1332 1333 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item, 1334 char *page) 1335 { 1336 struct se_device *dev = pr_to_dev(item); 1337 ssize_t len = 0; 1338 1339 spin_lock(&dev->dev_reservation_lock); 1340 if (!dev->dev_pr_res_holder) { 1341 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1342 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { 1343 len = sprintf(page, "SPC-3 Reservation: All Target" 1344 " Ports registration\n"); 1345 } else { 1346 len = sprintf(page, "SPC-3 Reservation: Single" 1347 " Target Port registration\n"); 1348 } 1349 1350 spin_unlock(&dev->dev_reservation_lock); 1351 return len; 1352 } 1353 1354 static ssize_t target_pr_res_pr_generation_show(struct config_item *item, 1355 char *page) 1356 { 1357 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation); 1358 } 1359 1360 1361 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item, 1362 char *page) 1363 { 1364 struct se_device *dev = pr_to_dev(item); 1365 struct se_node_acl *se_nacl; 1366 struct se_portal_group *se_tpg; 1367 struct t10_pr_registration *pr_reg; 1368 const struct target_core_fabric_ops *tfo; 1369 ssize_t len = 0; 1370 1371 spin_lock(&dev->dev_reservation_lock); 1372 pr_reg = dev->dev_pr_res_holder; 1373 if (!pr_reg) { 1374 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1375 goto out_unlock; 1376 } 1377 1378 se_nacl = pr_reg->pr_reg_nacl; 1379 se_tpg = se_nacl->se_tpg; 1380 tfo = se_tpg->se_tpg_tfo; 1381 1382 len += sprintf(page+len, "SPC-3 Reservation: %s" 1383 " Target Node Endpoint: %s\n", tfo->get_fabric_name(), 1384 tfo->tpg_get_wwn(se_tpg)); 1385 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1386 " Identifier Tag: %hu %s Portal Group Tag: %hu" 1387 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi, 1388 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg), 1389 tfo->get_fabric_name(), pr_reg->pr_aptpl_target_lun); 1390 1391 out_unlock: 1392 spin_unlock(&dev->dev_reservation_lock); 1393 return len; 1394 } 1395 1396 1397 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item, 1398 char *page) 1399 { 1400 struct se_device *dev = pr_to_dev(item); 1401 const struct target_core_fabric_ops *tfo; 1402 struct t10_pr_registration *pr_reg; 1403 unsigned char buf[384]; 1404 char i_buf[PR_REG_ISID_ID_LEN]; 1405 ssize_t len = 0; 1406 int reg_count = 0; 1407 1408 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1409 1410 spin_lock(&dev->t10_pr.registration_lock); 1411 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1412 pr_reg_list) { 1413 1414 memset(buf, 0, 384); 1415 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1416 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1417 core_pr_dump_initiator_port(pr_reg, i_buf, 1418 PR_REG_ISID_ID_LEN); 1419 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1420 tfo->get_fabric_name(), 1421 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, 1422 pr_reg->pr_res_generation); 1423 1424 if (len + strlen(buf) >= PAGE_SIZE) 1425 break; 1426 1427 len += sprintf(page+len, "%s", buf); 1428 reg_count++; 1429 } 1430 spin_unlock(&dev->t10_pr.registration_lock); 1431 1432 if (!reg_count) 1433 len += sprintf(page+len, "None\n"); 1434 1435 return len; 1436 } 1437 1438 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page) 1439 { 1440 struct se_device *dev = pr_to_dev(item); 1441 struct t10_pr_registration *pr_reg; 1442 ssize_t len = 0; 1443 1444 spin_lock(&dev->dev_reservation_lock); 1445 pr_reg = dev->dev_pr_res_holder; 1446 if (pr_reg) { 1447 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1448 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 1449 } else { 1450 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1451 } 1452 1453 spin_unlock(&dev->dev_reservation_lock); 1454 return len; 1455 } 1456 1457 static ssize_t target_pr_res_type_show(struct config_item *item, char *page) 1458 { 1459 struct se_device *dev = pr_to_dev(item); 1460 1461 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) 1462 return sprintf(page, "SPC_PASSTHROUGH\n"); 1463 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1464 return sprintf(page, "SPC2_RESERVATIONS\n"); 1465 else 1466 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 1467 } 1468 1469 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item, 1470 char *page) 1471 { 1472 struct se_device *dev = pr_to_dev(item); 1473 1474 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) 1475 return 0; 1476 1477 return sprintf(page, "APTPL Bit Status: %s\n", 1478 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 1479 } 1480 1481 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item, 1482 char *page) 1483 { 1484 struct se_device *dev = pr_to_dev(item); 1485 1486 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) 1487 return 0; 1488 1489 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 1490 } 1491 1492 enum { 1493 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 1494 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 1495 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 1496 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 1497 }; 1498 1499 static match_table_t tokens = { 1500 {Opt_initiator_fabric, "initiator_fabric=%s"}, 1501 {Opt_initiator_node, "initiator_node=%s"}, 1502 {Opt_initiator_sid, "initiator_sid=%s"}, 1503 {Opt_sa_res_key, "sa_res_key=%s"}, 1504 {Opt_res_holder, "res_holder=%d"}, 1505 {Opt_res_type, "res_type=%d"}, 1506 {Opt_res_scope, "res_scope=%d"}, 1507 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 1508 {Opt_mapped_lun, "mapped_lun=%lld"}, 1509 {Opt_target_fabric, "target_fabric=%s"}, 1510 {Opt_target_node, "target_node=%s"}, 1511 {Opt_tpgt, "tpgt=%d"}, 1512 {Opt_port_rtpi, "port_rtpi=%d"}, 1513 {Opt_target_lun, "target_lun=%lld"}, 1514 {Opt_err, NULL} 1515 }; 1516 1517 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item, 1518 const char *page, size_t count) 1519 { 1520 struct se_device *dev = pr_to_dev(item); 1521 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 1522 unsigned char *t_fabric = NULL, *t_port = NULL; 1523 char *orig, *ptr, *opts; 1524 substring_t args[MAX_OPT_ARGS]; 1525 unsigned long long tmp_ll; 1526 u64 sa_res_key = 0; 1527 u64 mapped_lun = 0, target_lun = 0; 1528 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 1529 u16 tpgt = 0; 1530 u8 type = 0; 1531 1532 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) 1533 return count; 1534 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1535 return count; 1536 1537 if (dev->export_count) { 1538 pr_debug("Unable to process APTPL metadata while" 1539 " active fabric exports exist\n"); 1540 return -EINVAL; 1541 } 1542 1543 opts = kstrdup(page, GFP_KERNEL); 1544 if (!opts) 1545 return -ENOMEM; 1546 1547 orig = opts; 1548 while ((ptr = strsep(&opts, ",\n")) != NULL) { 1549 if (!*ptr) 1550 continue; 1551 1552 token = match_token(ptr, tokens, args); 1553 switch (token) { 1554 case Opt_initiator_fabric: 1555 i_fabric = match_strdup(args); 1556 if (!i_fabric) { 1557 ret = -ENOMEM; 1558 goto out; 1559 } 1560 break; 1561 case Opt_initiator_node: 1562 i_port = match_strdup(args); 1563 if (!i_port) { 1564 ret = -ENOMEM; 1565 goto out; 1566 } 1567 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 1568 pr_err("APTPL metadata initiator_node=" 1569 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 1570 PR_APTPL_MAX_IPORT_LEN); 1571 ret = -EINVAL; 1572 break; 1573 } 1574 break; 1575 case Opt_initiator_sid: 1576 isid = match_strdup(args); 1577 if (!isid) { 1578 ret = -ENOMEM; 1579 goto out; 1580 } 1581 if (strlen(isid) >= PR_REG_ISID_LEN) { 1582 pr_err("APTPL metadata initiator_isid" 1583 "= exceeds PR_REG_ISID_LEN: %d\n", 1584 PR_REG_ISID_LEN); 1585 ret = -EINVAL; 1586 break; 1587 } 1588 break; 1589 case Opt_sa_res_key: 1590 ret = kstrtoull(args->from, 0, &tmp_ll); 1591 if (ret < 0) { 1592 pr_err("kstrtoull() failed for sa_res_key=\n"); 1593 goto out; 1594 } 1595 sa_res_key = (u64)tmp_ll; 1596 break; 1597 /* 1598 * PR APTPL Metadata for Reservation 1599 */ 1600 case Opt_res_holder: 1601 ret = match_int(args, &arg); 1602 if (ret) 1603 goto out; 1604 res_holder = arg; 1605 break; 1606 case Opt_res_type: 1607 ret = match_int(args, &arg); 1608 if (ret) 1609 goto out; 1610 type = (u8)arg; 1611 break; 1612 case Opt_res_scope: 1613 ret = match_int(args, &arg); 1614 if (ret) 1615 goto out; 1616 break; 1617 case Opt_res_all_tg_pt: 1618 ret = match_int(args, &arg); 1619 if (ret) 1620 goto out; 1621 all_tg_pt = (int)arg; 1622 break; 1623 case Opt_mapped_lun: 1624 ret = match_int(args, &arg); 1625 if (ret) 1626 goto out; 1627 mapped_lun = (u64)arg; 1628 break; 1629 /* 1630 * PR APTPL Metadata for Target Port 1631 */ 1632 case Opt_target_fabric: 1633 t_fabric = match_strdup(args); 1634 if (!t_fabric) { 1635 ret = -ENOMEM; 1636 goto out; 1637 } 1638 break; 1639 case Opt_target_node: 1640 t_port = match_strdup(args); 1641 if (!t_port) { 1642 ret = -ENOMEM; 1643 goto out; 1644 } 1645 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 1646 pr_err("APTPL metadata target_node=" 1647 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 1648 PR_APTPL_MAX_TPORT_LEN); 1649 ret = -EINVAL; 1650 break; 1651 } 1652 break; 1653 case Opt_tpgt: 1654 ret = match_int(args, &arg); 1655 if (ret) 1656 goto out; 1657 tpgt = (u16)arg; 1658 break; 1659 case Opt_port_rtpi: 1660 ret = match_int(args, &arg); 1661 if (ret) 1662 goto out; 1663 break; 1664 case Opt_target_lun: 1665 ret = match_int(args, &arg); 1666 if (ret) 1667 goto out; 1668 target_lun = (u64)arg; 1669 break; 1670 default: 1671 break; 1672 } 1673 } 1674 1675 if (!i_port || !t_port || !sa_res_key) { 1676 pr_err("Illegal parameters for APTPL registration\n"); 1677 ret = -EINVAL; 1678 goto out; 1679 } 1680 1681 if (res_holder && !(type)) { 1682 pr_err("Illegal PR type: 0x%02x for reservation" 1683 " holder\n", type); 1684 ret = -EINVAL; 1685 goto out; 1686 } 1687 1688 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, 1689 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 1690 res_holder, all_tg_pt, type); 1691 out: 1692 kfree(i_fabric); 1693 kfree(i_port); 1694 kfree(isid); 1695 kfree(t_fabric); 1696 kfree(t_port); 1697 kfree(orig); 1698 return (ret == 0) ? count : ret; 1699 } 1700 1701 1702 CONFIGFS_ATTR_RO(target_pr_, res_holder); 1703 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts); 1704 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation); 1705 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port); 1706 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts); 1707 CONFIGFS_ATTR_RO(target_pr_, res_pr_type); 1708 CONFIGFS_ATTR_RO(target_pr_, res_type); 1709 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active); 1710 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata); 1711 1712 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 1713 &target_pr_attr_res_holder, 1714 &target_pr_attr_res_pr_all_tgt_pts, 1715 &target_pr_attr_res_pr_generation, 1716 &target_pr_attr_res_pr_holder_tg_port, 1717 &target_pr_attr_res_pr_registered_i_pts, 1718 &target_pr_attr_res_pr_type, 1719 &target_pr_attr_res_type, 1720 &target_pr_attr_res_aptpl_active, 1721 &target_pr_attr_res_aptpl_metadata, 1722 NULL, 1723 }; 1724 1725 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs); 1726 1727 /* End functions for struct config_item_type tb_dev_pr_cit */ 1728 1729 /* Start functions for struct config_item_type tb_dev_cit */ 1730 1731 static inline struct se_device *to_device(struct config_item *item) 1732 { 1733 return container_of(to_config_group(item), struct se_device, dev_group); 1734 } 1735 1736 static ssize_t target_dev_info_show(struct config_item *item, char *page) 1737 { 1738 struct se_device *dev = to_device(item); 1739 int bl = 0; 1740 ssize_t read_bytes = 0; 1741 1742 transport_dump_dev_state(dev, page, &bl); 1743 read_bytes += bl; 1744 read_bytes += dev->transport->show_configfs_dev_params(dev, 1745 page+read_bytes); 1746 return read_bytes; 1747 } 1748 1749 static ssize_t target_dev_control_store(struct config_item *item, 1750 const char *page, size_t count) 1751 { 1752 struct se_device *dev = to_device(item); 1753 1754 return dev->transport->set_configfs_dev_params(dev, page, count); 1755 } 1756 1757 static ssize_t target_dev_alias_show(struct config_item *item, char *page) 1758 { 1759 struct se_device *dev = to_device(item); 1760 1761 if (!(dev->dev_flags & DF_USING_ALIAS)) 1762 return 0; 1763 1764 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); 1765 } 1766 1767 static ssize_t target_dev_alias_store(struct config_item *item, 1768 const char *page, size_t count) 1769 { 1770 struct se_device *dev = to_device(item); 1771 struct se_hba *hba = dev->se_hba; 1772 ssize_t read_bytes; 1773 1774 if (count > (SE_DEV_ALIAS_LEN-1)) { 1775 pr_err("alias count: %d exceeds" 1776 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 1777 SE_DEV_ALIAS_LEN-1); 1778 return -EINVAL; 1779 } 1780 1781 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); 1782 if (!read_bytes) 1783 return -EINVAL; 1784 if (dev->dev_alias[read_bytes - 1] == '\n') 1785 dev->dev_alias[read_bytes - 1] = '\0'; 1786 1787 dev->dev_flags |= DF_USING_ALIAS; 1788 1789 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 1790 config_item_name(&hba->hba_group.cg_item), 1791 config_item_name(&dev->dev_group.cg_item), 1792 dev->dev_alias); 1793 1794 return read_bytes; 1795 } 1796 1797 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page) 1798 { 1799 struct se_device *dev = to_device(item); 1800 1801 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) 1802 return 0; 1803 1804 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); 1805 } 1806 1807 static ssize_t target_dev_udev_path_store(struct config_item *item, 1808 const char *page, size_t count) 1809 { 1810 struct se_device *dev = to_device(item); 1811 struct se_hba *hba = dev->se_hba; 1812 ssize_t read_bytes; 1813 1814 if (count > (SE_UDEV_PATH_LEN-1)) { 1815 pr_err("udev_path count: %d exceeds" 1816 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 1817 SE_UDEV_PATH_LEN-1); 1818 return -EINVAL; 1819 } 1820 1821 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, 1822 "%s", page); 1823 if (!read_bytes) 1824 return -EINVAL; 1825 if (dev->udev_path[read_bytes - 1] == '\n') 1826 dev->udev_path[read_bytes - 1] = '\0'; 1827 1828 dev->dev_flags |= DF_USING_UDEV_PATH; 1829 1830 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 1831 config_item_name(&hba->hba_group.cg_item), 1832 config_item_name(&dev->dev_group.cg_item), 1833 dev->udev_path); 1834 1835 return read_bytes; 1836 } 1837 1838 static ssize_t target_dev_enable_show(struct config_item *item, char *page) 1839 { 1840 struct se_device *dev = to_device(item); 1841 1842 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED)); 1843 } 1844 1845 static ssize_t target_dev_enable_store(struct config_item *item, 1846 const char *page, size_t count) 1847 { 1848 struct se_device *dev = to_device(item); 1849 char *ptr; 1850 int ret; 1851 1852 ptr = strstr(page, "1"); 1853 if (!ptr) { 1854 pr_err("For dev_enable ops, only valid value" 1855 " is \"1\"\n"); 1856 return -EINVAL; 1857 } 1858 1859 ret = target_configure_device(dev); 1860 if (ret) 1861 return ret; 1862 return count; 1863 } 1864 1865 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page) 1866 { 1867 struct se_device *dev = to_device(item); 1868 struct config_item *lu_ci; 1869 struct t10_alua_lu_gp *lu_gp; 1870 struct t10_alua_lu_gp_member *lu_gp_mem; 1871 ssize_t len = 0; 1872 1873 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1874 if (!lu_gp_mem) 1875 return 0; 1876 1877 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1878 lu_gp = lu_gp_mem->lu_gp; 1879 if (lu_gp) { 1880 lu_ci = &lu_gp->lu_gp_group.cg_item; 1881 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 1882 config_item_name(lu_ci), lu_gp->lu_gp_id); 1883 } 1884 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1885 1886 return len; 1887 } 1888 1889 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item, 1890 const char *page, size_t count) 1891 { 1892 struct se_device *dev = to_device(item); 1893 struct se_hba *hba = dev->se_hba; 1894 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 1895 struct t10_alua_lu_gp_member *lu_gp_mem; 1896 unsigned char buf[LU_GROUP_NAME_BUF]; 1897 int move = 0; 1898 1899 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1900 if (!lu_gp_mem) 1901 return count; 1902 1903 if (count > LU_GROUP_NAME_BUF) { 1904 pr_err("ALUA LU Group Alias too large!\n"); 1905 return -EINVAL; 1906 } 1907 memset(buf, 0, LU_GROUP_NAME_BUF); 1908 memcpy(buf, page, count); 1909 /* 1910 * Any ALUA logical unit alias besides "NULL" means we will be 1911 * making a new group association. 1912 */ 1913 if (strcmp(strstrip(buf), "NULL")) { 1914 /* 1915 * core_alua_get_lu_gp_by_name() will increment reference to 1916 * struct t10_alua_lu_gp. This reference is released with 1917 * core_alua_get_lu_gp_by_name below(). 1918 */ 1919 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 1920 if (!lu_gp_new) 1921 return -ENODEV; 1922 } 1923 1924 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1925 lu_gp = lu_gp_mem->lu_gp; 1926 if (lu_gp) { 1927 /* 1928 * Clearing an existing lu_gp association, and replacing 1929 * with NULL 1930 */ 1931 if (!lu_gp_new) { 1932 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 1933 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 1934 " %hu\n", 1935 config_item_name(&hba->hba_group.cg_item), 1936 config_item_name(&dev->dev_group.cg_item), 1937 config_item_name(&lu_gp->lu_gp_group.cg_item), 1938 lu_gp->lu_gp_id); 1939 1940 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 1941 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1942 1943 return count; 1944 } 1945 /* 1946 * Removing existing association of lu_gp_mem with lu_gp 1947 */ 1948 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 1949 move = 1; 1950 } 1951 /* 1952 * Associate lu_gp_mem with lu_gp_new. 1953 */ 1954 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 1955 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1956 1957 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 1958 " core/alua/lu_gps/%s, ID: %hu\n", 1959 (move) ? "Moving" : "Adding", 1960 config_item_name(&hba->hba_group.cg_item), 1961 config_item_name(&dev->dev_group.cg_item), 1962 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 1963 lu_gp_new->lu_gp_id); 1964 1965 core_alua_put_lu_gp_from_name(lu_gp_new); 1966 return count; 1967 } 1968 1969 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page) 1970 { 1971 struct se_device *dev = to_device(item); 1972 struct t10_alua_lba_map *map; 1973 struct t10_alua_lba_map_member *mem; 1974 char *b = page; 1975 int bl = 0; 1976 char state; 1977 1978 spin_lock(&dev->t10_alua.lba_map_lock); 1979 if (!list_empty(&dev->t10_alua.lba_map_list)) 1980 bl += sprintf(b + bl, "%u %u\n", 1981 dev->t10_alua.lba_map_segment_size, 1982 dev->t10_alua.lba_map_segment_multiplier); 1983 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) { 1984 bl += sprintf(b + bl, "%llu %llu", 1985 map->lba_map_first_lba, map->lba_map_last_lba); 1986 list_for_each_entry(mem, &map->lba_map_mem_list, 1987 lba_map_mem_list) { 1988 switch (mem->lba_map_mem_alua_state) { 1989 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: 1990 state = 'O'; 1991 break; 1992 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: 1993 state = 'A'; 1994 break; 1995 case ALUA_ACCESS_STATE_STANDBY: 1996 state = 'S'; 1997 break; 1998 case ALUA_ACCESS_STATE_UNAVAILABLE: 1999 state = 'U'; 2000 break; 2001 default: 2002 state = '.'; 2003 break; 2004 } 2005 bl += sprintf(b + bl, " %d:%c", 2006 mem->lba_map_mem_alua_pg_id, state); 2007 } 2008 bl += sprintf(b + bl, "\n"); 2009 } 2010 spin_unlock(&dev->t10_alua.lba_map_lock); 2011 return bl; 2012 } 2013 2014 static ssize_t target_dev_lba_map_store(struct config_item *item, 2015 const char *page, size_t count) 2016 { 2017 struct se_device *dev = to_device(item); 2018 struct t10_alua_lba_map *lba_map = NULL; 2019 struct list_head lba_list; 2020 char *map_entries, *orig, *ptr; 2021 char state; 2022 int pg_num = -1, pg; 2023 int ret = 0, num = 0, pg_id, alua_state; 2024 unsigned long start_lba = -1, end_lba = -1; 2025 unsigned long segment_size = -1, segment_mult = -1; 2026 2027 orig = map_entries = kstrdup(page, GFP_KERNEL); 2028 if (!map_entries) 2029 return -ENOMEM; 2030 2031 INIT_LIST_HEAD(&lba_list); 2032 while ((ptr = strsep(&map_entries, "\n")) != NULL) { 2033 if (!*ptr) 2034 continue; 2035 2036 if (num == 0) { 2037 if (sscanf(ptr, "%lu %lu\n", 2038 &segment_size, &segment_mult) != 2) { 2039 pr_err("Invalid line %d\n", num); 2040 ret = -EINVAL; 2041 break; 2042 } 2043 num++; 2044 continue; 2045 } 2046 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) { 2047 pr_err("Invalid line %d\n", num); 2048 ret = -EINVAL; 2049 break; 2050 } 2051 ptr = strchr(ptr, ' '); 2052 if (!ptr) { 2053 pr_err("Invalid line %d, missing end lba\n", num); 2054 ret = -EINVAL; 2055 break; 2056 } 2057 ptr++; 2058 ptr = strchr(ptr, ' '); 2059 if (!ptr) { 2060 pr_err("Invalid line %d, missing state definitions\n", 2061 num); 2062 ret = -EINVAL; 2063 break; 2064 } 2065 ptr++; 2066 lba_map = core_alua_allocate_lba_map(&lba_list, 2067 start_lba, end_lba); 2068 if (IS_ERR(lba_map)) { 2069 ret = PTR_ERR(lba_map); 2070 break; 2071 } 2072 pg = 0; 2073 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) { 2074 switch (state) { 2075 case 'O': 2076 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED; 2077 break; 2078 case 'A': 2079 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED; 2080 break; 2081 case 'S': 2082 alua_state = ALUA_ACCESS_STATE_STANDBY; 2083 break; 2084 case 'U': 2085 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE; 2086 break; 2087 default: 2088 pr_err("Invalid ALUA state '%c'\n", state); 2089 ret = -EINVAL; 2090 goto out; 2091 } 2092 2093 ret = core_alua_allocate_lba_map_mem(lba_map, 2094 pg_id, alua_state); 2095 if (ret) { 2096 pr_err("Invalid target descriptor %d:%c " 2097 "at line %d\n", 2098 pg_id, state, num); 2099 break; 2100 } 2101 pg++; 2102 ptr = strchr(ptr, ' '); 2103 if (ptr) 2104 ptr++; 2105 else 2106 break; 2107 } 2108 if (pg_num == -1) 2109 pg_num = pg; 2110 else if (pg != pg_num) { 2111 pr_err("Only %d from %d port groups definitions " 2112 "at line %d\n", pg, pg_num, num); 2113 ret = -EINVAL; 2114 break; 2115 } 2116 num++; 2117 } 2118 out: 2119 if (ret) { 2120 core_alua_free_lba_map(&lba_list); 2121 count = ret; 2122 } else 2123 core_alua_set_lba_map(dev, &lba_list, 2124 segment_size, segment_mult); 2125 kfree(orig); 2126 return count; 2127 } 2128 2129 CONFIGFS_ATTR_RO(target_dev_, info); 2130 CONFIGFS_ATTR_WO(target_dev_, control); 2131 CONFIGFS_ATTR(target_dev_, alias); 2132 CONFIGFS_ATTR(target_dev_, udev_path); 2133 CONFIGFS_ATTR(target_dev_, enable); 2134 CONFIGFS_ATTR(target_dev_, alua_lu_gp); 2135 CONFIGFS_ATTR(target_dev_, lba_map); 2136 2137 static struct configfs_attribute *target_core_dev_attrs[] = { 2138 &target_dev_attr_info, 2139 &target_dev_attr_control, 2140 &target_dev_attr_alias, 2141 &target_dev_attr_udev_path, 2142 &target_dev_attr_enable, 2143 &target_dev_attr_alua_lu_gp, 2144 &target_dev_attr_lba_map, 2145 NULL, 2146 }; 2147 2148 static void target_core_dev_release(struct config_item *item) 2149 { 2150 struct config_group *dev_cg = to_config_group(item); 2151 struct se_device *dev = 2152 container_of(dev_cg, struct se_device, dev_group); 2153 2154 kfree(dev_cg->default_groups); 2155 target_free_device(dev); 2156 } 2157 2158 static struct configfs_item_operations target_core_dev_item_ops = { 2159 .release = target_core_dev_release, 2160 }; 2161 2162 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs); 2163 2164 /* End functions for struct config_item_type tb_dev_cit */ 2165 2166 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 2167 2168 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item) 2169 { 2170 return container_of(to_config_group(item), struct t10_alua_lu_gp, 2171 lu_gp_group); 2172 } 2173 2174 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page) 2175 { 2176 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2177 2178 if (!lu_gp->lu_gp_valid_id) 2179 return 0; 2180 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2181 } 2182 2183 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item, 2184 const char *page, size_t count) 2185 { 2186 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2187 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2188 unsigned long lu_gp_id; 2189 int ret; 2190 2191 ret = kstrtoul(page, 0, &lu_gp_id); 2192 if (ret < 0) { 2193 pr_err("kstrtoul() returned %d for" 2194 " lu_gp_id\n", ret); 2195 return ret; 2196 } 2197 if (lu_gp_id > 0x0000ffff) { 2198 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 2199 " 0x0000ffff\n", lu_gp_id); 2200 return -EINVAL; 2201 } 2202 2203 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2204 if (ret < 0) 2205 return -EINVAL; 2206 2207 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 2208 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2209 config_item_name(&alua_lu_gp_cg->cg_item), 2210 lu_gp->lu_gp_id); 2211 2212 return count; 2213 } 2214 2215 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page) 2216 { 2217 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2218 struct se_device *dev; 2219 struct se_hba *hba; 2220 struct t10_alua_lu_gp_member *lu_gp_mem; 2221 ssize_t len = 0, cur_len; 2222 unsigned char buf[LU_GROUP_NAME_BUF]; 2223 2224 memset(buf, 0, LU_GROUP_NAME_BUF); 2225 2226 spin_lock(&lu_gp->lu_gp_lock); 2227 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2228 dev = lu_gp_mem->lu_gp_mem_dev; 2229 hba = dev->se_hba; 2230 2231 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 2232 config_item_name(&hba->hba_group.cg_item), 2233 config_item_name(&dev->dev_group.cg_item)); 2234 cur_len++; /* Extra byte for NULL terminator */ 2235 2236 if ((cur_len + len) > PAGE_SIZE) { 2237 pr_warn("Ran out of lu_gp_show_attr" 2238 "_members buffer\n"); 2239 break; 2240 } 2241 memcpy(page+len, buf, cur_len); 2242 len += cur_len; 2243 } 2244 spin_unlock(&lu_gp->lu_gp_lock); 2245 2246 return len; 2247 } 2248 2249 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id); 2250 CONFIGFS_ATTR_RO(target_lu_gp_, members); 2251 2252 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2253 &target_lu_gp_attr_lu_gp_id, 2254 &target_lu_gp_attr_members, 2255 NULL, 2256 }; 2257 2258 static void target_core_alua_lu_gp_release(struct config_item *item) 2259 { 2260 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2261 struct t10_alua_lu_gp, lu_gp_group); 2262 2263 core_alua_free_lu_gp(lu_gp); 2264 } 2265 2266 static struct configfs_item_operations target_core_alua_lu_gp_ops = { 2267 .release = target_core_alua_lu_gp_release, 2268 }; 2269 2270 static struct config_item_type target_core_alua_lu_gp_cit = { 2271 .ct_item_ops = &target_core_alua_lu_gp_ops, 2272 .ct_attrs = target_core_alua_lu_gp_attrs, 2273 .ct_owner = THIS_MODULE, 2274 }; 2275 2276 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2277 2278 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2279 2280 static struct config_group *target_core_alua_create_lu_gp( 2281 struct config_group *group, 2282 const char *name) 2283 { 2284 struct t10_alua_lu_gp *lu_gp; 2285 struct config_group *alua_lu_gp_cg = NULL; 2286 struct config_item *alua_lu_gp_ci = NULL; 2287 2288 lu_gp = core_alua_allocate_lu_gp(name, 0); 2289 if (IS_ERR(lu_gp)) 2290 return NULL; 2291 2292 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2293 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2294 2295 config_group_init_type_name(alua_lu_gp_cg, name, 2296 &target_core_alua_lu_gp_cit); 2297 2298 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2299 " Group: core/alua/lu_gps/%s\n", 2300 config_item_name(alua_lu_gp_ci)); 2301 2302 return alua_lu_gp_cg; 2303 2304 } 2305 2306 static void target_core_alua_drop_lu_gp( 2307 struct config_group *group, 2308 struct config_item *item) 2309 { 2310 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2311 struct t10_alua_lu_gp, lu_gp_group); 2312 2313 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2314 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2315 config_item_name(item), lu_gp->lu_gp_id); 2316 /* 2317 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 2318 * -> target_core_alua_lu_gp_release() 2319 */ 2320 config_item_put(item); 2321 } 2322 2323 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2324 .make_group = &target_core_alua_create_lu_gp, 2325 .drop_item = &target_core_alua_drop_lu_gp, 2326 }; 2327 2328 static struct config_item_type target_core_alua_lu_gps_cit = { 2329 .ct_item_ops = NULL, 2330 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2331 .ct_owner = THIS_MODULE, 2332 }; 2333 2334 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2335 2336 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2337 2338 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item) 2339 { 2340 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp, 2341 tg_pt_gp_group); 2342 } 2343 2344 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item, 2345 char *page) 2346 { 2347 return sprintf(page, "%d\n", 2348 atomic_read(&to_tg_pt_gp(item)->tg_pt_gp_alua_access_state)); 2349 } 2350 2351 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item, 2352 const char *page, size_t count) 2353 { 2354 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2355 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; 2356 unsigned long tmp; 2357 int new_state, ret; 2358 2359 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2360 pr_err("Unable to do implicit ALUA on non valid" 2361 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id); 2362 return -EINVAL; 2363 } 2364 if (!(dev->dev_flags & DF_CONFIGURED)) { 2365 pr_err("Unable to set alua_access_state while device is" 2366 " not configured\n"); 2367 return -ENODEV; 2368 } 2369 2370 ret = kstrtoul(page, 0, &tmp); 2371 if (ret < 0) { 2372 pr_err("Unable to extract new ALUA access state from" 2373 " %s\n", page); 2374 return ret; 2375 } 2376 new_state = (int)tmp; 2377 2378 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) { 2379 pr_err("Unable to process implicit configfs ALUA" 2380 " transition while TPGS_IMPLICIT_ALUA is disabled\n"); 2381 return -EINVAL; 2382 } 2383 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA && 2384 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) { 2385 /* LBA DEPENDENT is only allowed with implicit ALUA */ 2386 pr_err("Unable to process implicit configfs ALUA transition" 2387 " while explicit ALUA management is enabled\n"); 2388 return -EINVAL; 2389 } 2390 2391 ret = core_alua_do_port_transition(tg_pt_gp, dev, 2392 NULL, NULL, new_state, 0); 2393 return (!ret) ? count : -EINVAL; 2394 } 2395 2396 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item, 2397 char *page) 2398 { 2399 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2400 return sprintf(page, "%s\n", 2401 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2402 } 2403 2404 static ssize_t target_tg_pt_gp_alua_access_status_store( 2405 struct config_item *item, const char *page, size_t count) 2406 { 2407 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2408 unsigned long tmp; 2409 int new_status, ret; 2410 2411 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2412 pr_err("Unable to do set ALUA access status on non" 2413 " valid tg_pt_gp ID: %hu\n", 2414 tg_pt_gp->tg_pt_gp_valid_id); 2415 return -EINVAL; 2416 } 2417 2418 ret = kstrtoul(page, 0, &tmp); 2419 if (ret < 0) { 2420 pr_err("Unable to extract new ALUA access status" 2421 " from %s\n", page); 2422 return ret; 2423 } 2424 new_status = (int)tmp; 2425 2426 if ((new_status != ALUA_STATUS_NONE) && 2427 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && 2428 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { 2429 pr_err("Illegal ALUA access status: 0x%02x\n", 2430 new_status); 2431 return -EINVAL; 2432 } 2433 2434 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2435 return count; 2436 } 2437 2438 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item, 2439 char *page) 2440 { 2441 return core_alua_show_access_type(to_tg_pt_gp(item), page); 2442 } 2443 2444 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item, 2445 const char *page, size_t count) 2446 { 2447 return core_alua_store_access_type(to_tg_pt_gp(item), page, count); 2448 } 2449 2450 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \ 2451 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \ 2452 struct config_item *item, char *p) \ 2453 { \ 2454 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 2455 return sprintf(p, "%d\n", \ 2456 !!(t->tg_pt_gp_alua_supported_states & _bit)); \ 2457 } \ 2458 \ 2459 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \ 2460 struct config_item *item, const char *p, size_t c) \ 2461 { \ 2462 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 2463 unsigned long tmp; \ 2464 int ret; \ 2465 \ 2466 if (!t->tg_pt_gp_valid_id) { \ 2467 pr_err("Unable to do set ##_name ALUA state on non" \ 2468 " valid tg_pt_gp ID: %hu\n", \ 2469 t->tg_pt_gp_valid_id); \ 2470 return -EINVAL; \ 2471 } \ 2472 \ 2473 ret = kstrtoul(p, 0, &tmp); \ 2474 if (ret < 0) { \ 2475 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \ 2476 return -EINVAL; \ 2477 } \ 2478 if (tmp > 1) { \ 2479 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \ 2480 return -EINVAL; \ 2481 } \ 2482 if (tmp) \ 2483 t->tg_pt_gp_alua_supported_states |= _bit; \ 2484 else \ 2485 t->tg_pt_gp_alua_supported_states &= ~_bit; \ 2486 \ 2487 return c; \ 2488 } 2489 2490 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP); 2491 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP); 2492 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP); 2493 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP); 2494 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP); 2495 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP); 2496 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP); 2497 2498 static ssize_t target_tg_pt_gp_alua_write_metadata_show( 2499 struct config_item *item, char *page) 2500 { 2501 return sprintf(page, "%d\n", 2502 to_tg_pt_gp(item)->tg_pt_gp_write_metadata); 2503 } 2504 2505 static ssize_t target_tg_pt_gp_alua_write_metadata_store( 2506 struct config_item *item, const char *page, size_t count) 2507 { 2508 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2509 unsigned long tmp; 2510 int ret; 2511 2512 ret = kstrtoul(page, 0, &tmp); 2513 if (ret < 0) { 2514 pr_err("Unable to extract alua_write_metadata\n"); 2515 return ret; 2516 } 2517 2518 if ((tmp != 0) && (tmp != 1)) { 2519 pr_err("Illegal value for alua_write_metadata:" 2520 " %lu\n", tmp); 2521 return -EINVAL; 2522 } 2523 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 2524 2525 return count; 2526 } 2527 2528 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item, 2529 char *page) 2530 { 2531 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page); 2532 } 2533 2534 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item, 2535 const char *page, size_t count) 2536 { 2537 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page, 2538 count); 2539 } 2540 2541 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item, 2542 char *page) 2543 { 2544 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page); 2545 } 2546 2547 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item, 2548 const char *page, size_t count) 2549 { 2550 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page, 2551 count); 2552 } 2553 2554 static ssize_t target_tg_pt_gp_implicit_trans_secs_show( 2555 struct config_item *item, char *page) 2556 { 2557 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page); 2558 } 2559 2560 static ssize_t target_tg_pt_gp_implicit_trans_secs_store( 2561 struct config_item *item, const char *page, size_t count) 2562 { 2563 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page, 2564 count); 2565 } 2566 2567 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item, 2568 char *page) 2569 { 2570 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page); 2571 } 2572 2573 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item, 2574 const char *page, size_t count) 2575 { 2576 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count); 2577 } 2578 2579 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item, 2580 char *page) 2581 { 2582 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2583 2584 if (!tg_pt_gp->tg_pt_gp_valid_id) 2585 return 0; 2586 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 2587 } 2588 2589 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item, 2590 const char *page, size_t count) 2591 { 2592 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2593 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2594 unsigned long tg_pt_gp_id; 2595 int ret; 2596 2597 ret = kstrtoul(page, 0, &tg_pt_gp_id); 2598 if (ret < 0) { 2599 pr_err("kstrtoul() returned %d for" 2600 " tg_pt_gp_id\n", ret); 2601 return ret; 2602 } 2603 if (tg_pt_gp_id > 0x0000ffff) { 2604 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:" 2605 " 0x0000ffff\n", tg_pt_gp_id); 2606 return -EINVAL; 2607 } 2608 2609 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 2610 if (ret < 0) 2611 return -EINVAL; 2612 2613 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 2614 "core/alua/tg_pt_gps/%s to ID: %hu\n", 2615 config_item_name(&alua_tg_pt_gp_cg->cg_item), 2616 tg_pt_gp->tg_pt_gp_id); 2617 2618 return count; 2619 } 2620 2621 static ssize_t target_tg_pt_gp_members_show(struct config_item *item, 2622 char *page) 2623 { 2624 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2625 struct se_lun *lun; 2626 ssize_t len = 0, cur_len; 2627 unsigned char buf[TG_PT_GROUP_NAME_BUF]; 2628 2629 memset(buf, 0, TG_PT_GROUP_NAME_BUF); 2630 2631 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 2632 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, 2633 lun_tg_pt_gp_link) { 2634 struct se_portal_group *tpg = lun->lun_tpg; 2635 2636 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 2637 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(), 2638 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 2639 tpg->se_tpg_tfo->tpg_get_tag(tpg), 2640 config_item_name(&lun->lun_group.cg_item)); 2641 cur_len++; /* Extra byte for NULL terminator */ 2642 2643 if ((cur_len + len) > PAGE_SIZE) { 2644 pr_warn("Ran out of lu_gp_show_attr" 2645 "_members buffer\n"); 2646 break; 2647 } 2648 memcpy(page+len, buf, cur_len); 2649 len += cur_len; 2650 } 2651 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 2652 2653 return len; 2654 } 2655 2656 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state); 2657 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status); 2658 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type); 2659 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning); 2660 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline); 2661 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent); 2662 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable); 2663 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby); 2664 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized); 2665 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized); 2666 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata); 2667 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs); 2668 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs); 2669 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs); 2670 CONFIGFS_ATTR(target_tg_pt_gp_, preferred); 2671 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id); 2672 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members); 2673 2674 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 2675 &target_tg_pt_gp_attr_alua_access_state, 2676 &target_tg_pt_gp_attr_alua_access_status, 2677 &target_tg_pt_gp_attr_alua_access_type, 2678 &target_tg_pt_gp_attr_alua_support_transitioning, 2679 &target_tg_pt_gp_attr_alua_support_offline, 2680 &target_tg_pt_gp_attr_alua_support_lba_dependent, 2681 &target_tg_pt_gp_attr_alua_support_unavailable, 2682 &target_tg_pt_gp_attr_alua_support_standby, 2683 &target_tg_pt_gp_attr_alua_support_active_nonoptimized, 2684 &target_tg_pt_gp_attr_alua_support_active_optimized, 2685 &target_tg_pt_gp_attr_alua_write_metadata, 2686 &target_tg_pt_gp_attr_nonop_delay_msecs, 2687 &target_tg_pt_gp_attr_trans_delay_msecs, 2688 &target_tg_pt_gp_attr_implicit_trans_secs, 2689 &target_tg_pt_gp_attr_preferred, 2690 &target_tg_pt_gp_attr_tg_pt_gp_id, 2691 &target_tg_pt_gp_attr_members, 2692 NULL, 2693 }; 2694 2695 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 2696 { 2697 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2698 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2699 2700 core_alua_free_tg_pt_gp(tg_pt_gp); 2701 } 2702 2703 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 2704 .release = target_core_alua_tg_pt_gp_release, 2705 }; 2706 2707 static struct config_item_type target_core_alua_tg_pt_gp_cit = { 2708 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 2709 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 2710 .ct_owner = THIS_MODULE, 2711 }; 2712 2713 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2714 2715 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 2716 2717 static struct config_group *target_core_alua_create_tg_pt_gp( 2718 struct config_group *group, 2719 const char *name) 2720 { 2721 struct t10_alua *alua = container_of(group, struct t10_alua, 2722 alua_tg_pt_gps_group); 2723 struct t10_alua_tg_pt_gp *tg_pt_gp; 2724 struct config_group *alua_tg_pt_gp_cg = NULL; 2725 struct config_item *alua_tg_pt_gp_ci = NULL; 2726 2727 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0); 2728 if (!tg_pt_gp) 2729 return NULL; 2730 2731 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2732 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 2733 2734 config_group_init_type_name(alua_tg_pt_gp_cg, name, 2735 &target_core_alua_tg_pt_gp_cit); 2736 2737 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 2738 " Group: alua/tg_pt_gps/%s\n", 2739 config_item_name(alua_tg_pt_gp_ci)); 2740 2741 return alua_tg_pt_gp_cg; 2742 } 2743 2744 static void target_core_alua_drop_tg_pt_gp( 2745 struct config_group *group, 2746 struct config_item *item) 2747 { 2748 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2749 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2750 2751 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 2752 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 2753 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 2754 /* 2755 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 2756 * -> target_core_alua_tg_pt_gp_release(). 2757 */ 2758 config_item_put(item); 2759 } 2760 2761 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 2762 .make_group = &target_core_alua_create_tg_pt_gp, 2763 .drop_item = &target_core_alua_drop_tg_pt_gp, 2764 }; 2765 2766 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL); 2767 2768 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 2769 2770 /* Start functions for struct config_item_type target_core_alua_cit */ 2771 2772 /* 2773 * target_core_alua_cit is a ConfigFS group that lives under 2774 * /sys/kernel/config/target/core/alua. There are default groups 2775 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 2776 * target_core_alua_cit in target_core_init_configfs() below. 2777 */ 2778 static struct config_item_type target_core_alua_cit = { 2779 .ct_item_ops = NULL, 2780 .ct_attrs = NULL, 2781 .ct_owner = THIS_MODULE, 2782 }; 2783 2784 /* End functions for struct config_item_type target_core_alua_cit */ 2785 2786 /* Start functions for struct config_item_type tb_dev_stat_cit */ 2787 2788 static struct config_group *target_core_stat_mkdir( 2789 struct config_group *group, 2790 const char *name) 2791 { 2792 return ERR_PTR(-ENOSYS); 2793 } 2794 2795 static void target_core_stat_rmdir( 2796 struct config_group *group, 2797 struct config_item *item) 2798 { 2799 return; 2800 } 2801 2802 static struct configfs_group_operations target_core_stat_group_ops = { 2803 .make_group = &target_core_stat_mkdir, 2804 .drop_item = &target_core_stat_rmdir, 2805 }; 2806 2807 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL); 2808 2809 /* End functions for struct config_item_type tb_dev_stat_cit */ 2810 2811 /* Start functions for struct config_item_type target_core_hba_cit */ 2812 2813 static struct config_group *target_core_make_subdev( 2814 struct config_group *group, 2815 const char *name) 2816 { 2817 struct t10_alua_tg_pt_gp *tg_pt_gp; 2818 struct config_item *hba_ci = &group->cg_item; 2819 struct se_hba *hba = item_to_hba(hba_ci); 2820 struct target_backend *tb = hba->backend; 2821 struct se_device *dev; 2822 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL; 2823 struct config_group *dev_stat_grp = NULL; 2824 int errno = -ENOMEM, ret; 2825 2826 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 2827 if (ret) 2828 return ERR_PTR(ret); 2829 2830 dev = target_alloc_device(hba, name); 2831 if (!dev) 2832 goto out_unlock; 2833 2834 dev_cg = &dev->dev_group; 2835 2836 dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6, 2837 GFP_KERNEL); 2838 if (!dev_cg->default_groups) 2839 goto out_free_device; 2840 2841 config_group_init_type_name(dev_cg, name, &tb->tb_dev_cit); 2842 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib", 2843 &tb->tb_dev_attrib_cit); 2844 config_group_init_type_name(&dev->dev_pr_group, "pr", 2845 &tb->tb_dev_pr_cit); 2846 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn", 2847 &tb->tb_dev_wwn_cit); 2848 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group, 2849 "alua", &tb->tb_dev_alua_tg_pt_gps_cit); 2850 config_group_init_type_name(&dev->dev_stat_grps.stat_group, 2851 "statistics", &tb->tb_dev_stat_cit); 2852 2853 dev_cg->default_groups[0] = &dev->dev_attrib.da_group; 2854 dev_cg->default_groups[1] = &dev->dev_pr_group; 2855 dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group; 2856 dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group; 2857 dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group; 2858 dev_cg->default_groups[5] = NULL; 2859 /* 2860 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 2861 */ 2862 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1); 2863 if (!tg_pt_gp) 2864 goto out_free_dev_cg_default_groups; 2865 dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 2866 2867 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group; 2868 tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 2869 GFP_KERNEL); 2870 if (!tg_pt_gp_cg->default_groups) { 2871 pr_err("Unable to allocate tg_pt_gp_cg->" 2872 "default_groups\n"); 2873 goto out_free_tg_pt_gp; 2874 } 2875 2876 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 2877 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 2878 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group; 2879 tg_pt_gp_cg->default_groups[1] = NULL; 2880 /* 2881 * Add core/$HBA/$DEV/statistics/ default groups 2882 */ 2883 dev_stat_grp = &dev->dev_stat_grps.stat_group; 2884 dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4, 2885 GFP_KERNEL); 2886 if (!dev_stat_grp->default_groups) { 2887 pr_err("Unable to allocate dev_stat_grp->default_groups\n"); 2888 goto out_free_tg_pt_gp_cg_default_groups; 2889 } 2890 target_stat_setup_dev_default_groups(dev); 2891 2892 mutex_unlock(&hba->hba_access_mutex); 2893 return dev_cg; 2894 2895 out_free_tg_pt_gp_cg_default_groups: 2896 kfree(tg_pt_gp_cg->default_groups); 2897 out_free_tg_pt_gp: 2898 core_alua_free_tg_pt_gp(tg_pt_gp); 2899 out_free_dev_cg_default_groups: 2900 kfree(dev_cg->default_groups); 2901 out_free_device: 2902 target_free_device(dev); 2903 out_unlock: 2904 mutex_unlock(&hba->hba_access_mutex); 2905 return ERR_PTR(errno); 2906 } 2907 2908 static void target_core_drop_subdev( 2909 struct config_group *group, 2910 struct config_item *item) 2911 { 2912 struct config_group *dev_cg = to_config_group(item); 2913 struct se_device *dev = 2914 container_of(dev_cg, struct se_device, dev_group); 2915 struct se_hba *hba; 2916 struct config_item *df_item; 2917 struct config_group *tg_pt_gp_cg, *dev_stat_grp; 2918 int i; 2919 2920 hba = item_to_hba(&dev->se_hba->hba_group.cg_item); 2921 2922 mutex_lock(&hba->hba_access_mutex); 2923 2924 dev_stat_grp = &dev->dev_stat_grps.stat_group; 2925 for (i = 0; dev_stat_grp->default_groups[i]; i++) { 2926 df_item = &dev_stat_grp->default_groups[i]->cg_item; 2927 dev_stat_grp->default_groups[i] = NULL; 2928 config_item_put(df_item); 2929 } 2930 kfree(dev_stat_grp->default_groups); 2931 2932 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group; 2933 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) { 2934 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item; 2935 tg_pt_gp_cg->default_groups[i] = NULL; 2936 config_item_put(df_item); 2937 } 2938 kfree(tg_pt_gp_cg->default_groups); 2939 /* 2940 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 2941 * directly from target_core_alua_tg_pt_gp_release(). 2942 */ 2943 dev->t10_alua.default_tg_pt_gp = NULL; 2944 2945 for (i = 0; dev_cg->default_groups[i]; i++) { 2946 df_item = &dev_cg->default_groups[i]->cg_item; 2947 dev_cg->default_groups[i] = NULL; 2948 config_item_put(df_item); 2949 } 2950 /* 2951 * se_dev is released from target_core_dev_item_ops->release() 2952 */ 2953 config_item_put(item); 2954 mutex_unlock(&hba->hba_access_mutex); 2955 } 2956 2957 static struct configfs_group_operations target_core_hba_group_ops = { 2958 .make_group = target_core_make_subdev, 2959 .drop_item = target_core_drop_subdev, 2960 }; 2961 2962 2963 static inline struct se_hba *to_hba(struct config_item *item) 2964 { 2965 return container_of(to_config_group(item), struct se_hba, hba_group); 2966 } 2967 2968 static ssize_t target_hba_info_show(struct config_item *item, char *page) 2969 { 2970 struct se_hba *hba = to_hba(item); 2971 2972 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 2973 hba->hba_id, hba->backend->ops->name, 2974 TARGET_CORE_VERSION); 2975 } 2976 2977 static ssize_t target_hba_mode_show(struct config_item *item, char *page) 2978 { 2979 struct se_hba *hba = to_hba(item); 2980 int hba_mode = 0; 2981 2982 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 2983 hba_mode = 1; 2984 2985 return sprintf(page, "%d\n", hba_mode); 2986 } 2987 2988 static ssize_t target_hba_mode_store(struct config_item *item, 2989 const char *page, size_t count) 2990 { 2991 struct se_hba *hba = to_hba(item); 2992 unsigned long mode_flag; 2993 int ret; 2994 2995 if (hba->backend->ops->pmode_enable_hba == NULL) 2996 return -EINVAL; 2997 2998 ret = kstrtoul(page, 0, &mode_flag); 2999 if (ret < 0) { 3000 pr_err("Unable to extract hba mode flag: %d\n", ret); 3001 return ret; 3002 } 3003 3004 if (hba->dev_count) { 3005 pr_err("Unable to set hba_mode with active devices\n"); 3006 return -EINVAL; 3007 } 3008 3009 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag); 3010 if (ret < 0) 3011 return -EINVAL; 3012 if (ret > 0) 3013 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 3014 else if (ret == 0) 3015 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 3016 3017 return count; 3018 } 3019 3020 CONFIGFS_ATTR_RO(target_, hba_info); 3021 CONFIGFS_ATTR(target_, hba_mode); 3022 3023 static void target_core_hba_release(struct config_item *item) 3024 { 3025 struct se_hba *hba = container_of(to_config_group(item), 3026 struct se_hba, hba_group); 3027 core_delete_hba(hba); 3028 } 3029 3030 static struct configfs_attribute *target_core_hba_attrs[] = { 3031 &target_attr_hba_info, 3032 &target_attr_hba_mode, 3033 NULL, 3034 }; 3035 3036 static struct configfs_item_operations target_core_hba_item_ops = { 3037 .release = target_core_hba_release, 3038 }; 3039 3040 static struct config_item_type target_core_hba_cit = { 3041 .ct_item_ops = &target_core_hba_item_ops, 3042 .ct_group_ops = &target_core_hba_group_ops, 3043 .ct_attrs = target_core_hba_attrs, 3044 .ct_owner = THIS_MODULE, 3045 }; 3046 3047 static struct config_group *target_core_call_addhbatotarget( 3048 struct config_group *group, 3049 const char *name) 3050 { 3051 char *se_plugin_str, *str, *str2; 3052 struct se_hba *hba; 3053 char buf[TARGET_CORE_NAME_MAX_LEN]; 3054 unsigned long plugin_dep_id = 0; 3055 int ret; 3056 3057 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN); 3058 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 3059 pr_err("Passed *name strlen(): %d exceeds" 3060 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 3061 TARGET_CORE_NAME_MAX_LEN); 3062 return ERR_PTR(-ENAMETOOLONG); 3063 } 3064 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 3065 3066 str = strstr(buf, "_"); 3067 if (!str) { 3068 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 3069 return ERR_PTR(-EINVAL); 3070 } 3071 se_plugin_str = buf; 3072 /* 3073 * Special case for subsystem plugins that have "_" in their names. 3074 * Namely rd_direct and rd_mcp.. 3075 */ 3076 str2 = strstr(str+1, "_"); 3077 if (str2) { 3078 *str2 = '\0'; /* Terminate for *se_plugin_str */ 3079 str2++; /* Skip to start of plugin dependent ID */ 3080 str = str2; 3081 } else { 3082 *str = '\0'; /* Terminate for *se_plugin_str */ 3083 str++; /* Skip to start of plugin dependent ID */ 3084 } 3085 3086 ret = kstrtoul(str, 0, &plugin_dep_id); 3087 if (ret < 0) { 3088 pr_err("kstrtoul() returned %d for" 3089 " plugin_dep_id\n", ret); 3090 return ERR_PTR(ret); 3091 } 3092 /* 3093 * Load up TCM subsystem plugins if they have not already been loaded. 3094 */ 3095 transport_subsystem_check_init(); 3096 3097 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 3098 if (IS_ERR(hba)) 3099 return ERR_CAST(hba); 3100 3101 config_group_init_type_name(&hba->hba_group, name, 3102 &target_core_hba_cit); 3103 3104 return &hba->hba_group; 3105 } 3106 3107 static void target_core_call_delhbafromtarget( 3108 struct config_group *group, 3109 struct config_item *item) 3110 { 3111 /* 3112 * core_delete_hba() is called from target_core_hba_item_ops->release() 3113 * -> target_core_hba_release() 3114 */ 3115 config_item_put(item); 3116 } 3117 3118 static struct configfs_group_operations target_core_group_ops = { 3119 .make_group = target_core_call_addhbatotarget, 3120 .drop_item = target_core_call_delhbafromtarget, 3121 }; 3122 3123 static struct config_item_type target_core_cit = { 3124 .ct_item_ops = NULL, 3125 .ct_group_ops = &target_core_group_ops, 3126 .ct_attrs = NULL, 3127 .ct_owner = THIS_MODULE, 3128 }; 3129 3130 /* Stop functions for struct config_item_type target_core_hba_cit */ 3131 3132 void target_setup_backend_cits(struct target_backend *tb) 3133 { 3134 target_core_setup_dev_cit(tb); 3135 target_core_setup_dev_attrib_cit(tb); 3136 target_core_setup_dev_pr_cit(tb); 3137 target_core_setup_dev_wwn_cit(tb); 3138 target_core_setup_dev_alua_tg_pt_gps_cit(tb); 3139 target_core_setup_dev_stat_cit(tb); 3140 } 3141 3142 static int __init target_core_init_configfs(void) 3143 { 3144 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL; 3145 struct config_group *lu_gp_cg = NULL; 3146 struct configfs_subsystem *subsys = &target_core_fabrics; 3147 struct t10_alua_lu_gp *lu_gp; 3148 int ret; 3149 3150 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 3151 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3152 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3153 3154 config_group_init(&subsys->su_group); 3155 mutex_init(&subsys->su_mutex); 3156 3157 ret = init_se_kmem_caches(); 3158 if (ret < 0) 3159 return ret; 3160 /* 3161 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3162 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3163 */ 3164 target_cg = &subsys->su_group; 3165 target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 3166 GFP_KERNEL); 3167 if (!target_cg->default_groups) { 3168 pr_err("Unable to allocate target_cg->default_groups\n"); 3169 ret = -ENOMEM; 3170 goto out_global; 3171 } 3172 3173 config_group_init_type_name(&target_core_hbagroup, 3174 "core", &target_core_cit); 3175 target_cg->default_groups[0] = &target_core_hbagroup; 3176 target_cg->default_groups[1] = NULL; 3177 /* 3178 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3179 */ 3180 hba_cg = &target_core_hbagroup; 3181 hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 3182 GFP_KERNEL); 3183 if (!hba_cg->default_groups) { 3184 pr_err("Unable to allocate hba_cg->default_groups\n"); 3185 ret = -ENOMEM; 3186 goto out_global; 3187 } 3188 config_group_init_type_name(&alua_group, 3189 "alua", &target_core_alua_cit); 3190 hba_cg->default_groups[0] = &alua_group; 3191 hba_cg->default_groups[1] = NULL; 3192 /* 3193 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3194 * groups under /sys/kernel/config/target/core/alua/ 3195 */ 3196 alua_cg = &alua_group; 3197 alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 3198 GFP_KERNEL); 3199 if (!alua_cg->default_groups) { 3200 pr_err("Unable to allocate alua_cg->default_groups\n"); 3201 ret = -ENOMEM; 3202 goto out_global; 3203 } 3204 3205 config_group_init_type_name(&alua_lu_gps_group, 3206 "lu_gps", &target_core_alua_lu_gps_cit); 3207 alua_cg->default_groups[0] = &alua_lu_gps_group; 3208 alua_cg->default_groups[1] = NULL; 3209 /* 3210 * Add core/alua/lu_gps/default_lu_gp 3211 */ 3212 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3213 if (IS_ERR(lu_gp)) { 3214 ret = -ENOMEM; 3215 goto out_global; 3216 } 3217 3218 lu_gp_cg = &alua_lu_gps_group; 3219 lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 3220 GFP_KERNEL); 3221 if (!lu_gp_cg->default_groups) { 3222 pr_err("Unable to allocate lu_gp_cg->default_groups\n"); 3223 ret = -ENOMEM; 3224 goto out_global; 3225 } 3226 3227 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3228 &target_core_alua_lu_gp_cit); 3229 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group; 3230 lu_gp_cg->default_groups[1] = NULL; 3231 default_lu_gp = lu_gp; 3232 /* 3233 * Register the target_core_mod subsystem with configfs. 3234 */ 3235 ret = configfs_register_subsystem(subsys); 3236 if (ret < 0) { 3237 pr_err("Error %d while registering subsystem %s\n", 3238 ret, subsys->su_group.cg_item.ci_namebuf); 3239 goto out_global; 3240 } 3241 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 3242 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s" 3243 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3244 /* 3245 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3246 */ 3247 ret = rd_module_init(); 3248 if (ret < 0) 3249 goto out; 3250 3251 ret = core_dev_setup_virtual_lun0(); 3252 if (ret < 0) 3253 goto out; 3254 3255 ret = target_xcopy_setup_pt(); 3256 if (ret < 0) 3257 goto out; 3258 3259 return 0; 3260 3261 out: 3262 configfs_unregister_subsystem(subsys); 3263 core_dev_release_virtual_lun0(); 3264 rd_module_exit(); 3265 out_global: 3266 if (default_lu_gp) { 3267 core_alua_free_lu_gp(default_lu_gp); 3268 default_lu_gp = NULL; 3269 } 3270 if (lu_gp_cg) 3271 kfree(lu_gp_cg->default_groups); 3272 if (alua_cg) 3273 kfree(alua_cg->default_groups); 3274 if (hba_cg) 3275 kfree(hba_cg->default_groups); 3276 kfree(target_cg->default_groups); 3277 release_se_kmem_caches(); 3278 return ret; 3279 } 3280 3281 static void __exit target_core_exit_configfs(void) 3282 { 3283 struct config_group *hba_cg, *alua_cg, *lu_gp_cg; 3284 struct config_item *item; 3285 int i; 3286 3287 lu_gp_cg = &alua_lu_gps_group; 3288 for (i = 0; lu_gp_cg->default_groups[i]; i++) { 3289 item = &lu_gp_cg->default_groups[i]->cg_item; 3290 lu_gp_cg->default_groups[i] = NULL; 3291 config_item_put(item); 3292 } 3293 kfree(lu_gp_cg->default_groups); 3294 lu_gp_cg->default_groups = NULL; 3295 3296 alua_cg = &alua_group; 3297 for (i = 0; alua_cg->default_groups[i]; i++) { 3298 item = &alua_cg->default_groups[i]->cg_item; 3299 alua_cg->default_groups[i] = NULL; 3300 config_item_put(item); 3301 } 3302 kfree(alua_cg->default_groups); 3303 alua_cg->default_groups = NULL; 3304 3305 hba_cg = &target_core_hbagroup; 3306 for (i = 0; hba_cg->default_groups[i]; i++) { 3307 item = &hba_cg->default_groups[i]->cg_item; 3308 hba_cg->default_groups[i] = NULL; 3309 config_item_put(item); 3310 } 3311 kfree(hba_cg->default_groups); 3312 hba_cg->default_groups = NULL; 3313 /* 3314 * We expect subsys->su_group.default_groups to be released 3315 * by configfs subsystem provider logic.. 3316 */ 3317 configfs_unregister_subsystem(&target_core_fabrics); 3318 kfree(target_core_fabrics.su_group.default_groups); 3319 3320 core_alua_free_lu_gp(default_lu_gp); 3321 default_lu_gp = NULL; 3322 3323 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3324 " Infrastructure\n"); 3325 3326 core_dev_release_virtual_lun0(); 3327 rd_module_exit(); 3328 target_xcopy_release_pt(); 3329 release_se_kmem_caches(); 3330 } 3331 3332 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3333 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3334 MODULE_LICENSE("GPL"); 3335 3336 module_init(target_core_init_configfs); 3337 module_exit(target_core_exit_configfs); 3338