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