1 /******************************************************************************* 2 * Filename: target_core_configfs.c 3 * 4 * This file contains ConfigFS logic for the Generic Target Engine project. 5 * 6 * (c) Copyright 2008-2013 Datera, Inc. 7 * 8 * Nicholas A. Bellinger <nab@kernel.org> 9 * 10 * based on configfs Copyright (C) 2005 Oracle. All rights reserved. 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License as published by 14 * the Free Software Foundation; either version 2 of the License, or 15 * (at your option) any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 ****************************************************************************/ 22 23 #include <linux/module.h> 24 #include <linux/moduleparam.h> 25 #include <generated/utsrelease.h> 26 #include <linux/utsname.h> 27 #include <linux/init.h> 28 #include <linux/fs.h> 29 #include <linux/namei.h> 30 #include <linux/slab.h> 31 #include <linux/types.h> 32 #include <linux/delay.h> 33 #include <linux/unistd.h> 34 #include <linux/string.h> 35 #include <linux/parser.h> 36 #include <linux/syscalls.h> 37 #include <linux/configfs.h> 38 #include <linux/spinlock.h> 39 40 #include <target/target_core_base.h> 41 #include <target/target_core_backend.h> 42 #include <target/target_core_fabric.h> 43 44 #include "target_core_internal.h" 45 #include "target_core_alua.h" 46 #include "target_core_pr.h" 47 #include "target_core_rd.h" 48 #include "target_core_xcopy.h" 49 50 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \ 51 static void target_core_setup_##_name##_cit(struct target_backend *tb) \ 52 { \ 53 struct config_item_type *cit = &tb->tb_##_name##_cit; \ 54 \ 55 cit->ct_item_ops = _item_ops; \ 56 cit->ct_group_ops = _group_ops; \ 57 cit->ct_attrs = _attrs; \ 58 cit->ct_owner = tb->ops->owner; \ 59 pr_debug("Setup generic %s\n", __stringify(_name)); \ 60 } 61 62 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \ 63 static void target_core_setup_##_name##_cit(struct target_backend *tb) \ 64 { \ 65 struct config_item_type *cit = &tb->tb_##_name##_cit; \ 66 \ 67 cit->ct_item_ops = _item_ops; \ 68 cit->ct_group_ops = _group_ops; \ 69 cit->ct_attrs = tb->ops->tb_##_name##_attrs; \ 70 cit->ct_owner = tb->ops->owner; \ 71 pr_debug("Setup generic %s\n", __stringify(_name)); \ 72 } 73 74 extern struct t10_alua_lu_gp *default_lu_gp; 75 76 static LIST_HEAD(g_tf_list); 77 static DEFINE_MUTEX(g_tf_lock); 78 79 static struct config_group target_core_hbagroup; 80 static struct config_group alua_group; 81 static struct config_group alua_lu_gps_group; 82 83 static inline struct se_hba * 84 item_to_hba(struct config_item *item) 85 { 86 return container_of(to_config_group(item), struct se_hba, hba_group); 87 } 88 89 /* 90 * Attributes for /sys/kernel/config/target/ 91 */ 92 static ssize_t target_core_item_version_show(struct config_item *item, 93 char *page) 94 { 95 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s" 96 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION, 97 utsname()->sysname, utsname()->machine); 98 } 99 100 CONFIGFS_ATTR_RO(target_core_item_, version); 101 102 char db_root[DB_ROOT_LEN] = DB_ROOT_DEFAULT; 103 static char db_root_stage[DB_ROOT_LEN]; 104 105 static ssize_t target_core_item_dbroot_show(struct config_item *item, 106 char *page) 107 { 108 return sprintf(page, "%s\n", db_root); 109 } 110 111 static ssize_t target_core_item_dbroot_store(struct config_item *item, 112 const char *page, size_t count) 113 { 114 ssize_t read_bytes; 115 struct file *fp; 116 117 mutex_lock(&g_tf_lock); 118 if (!list_empty(&g_tf_list)) { 119 mutex_unlock(&g_tf_lock); 120 pr_err("db_root: cannot be changed: target drivers registered"); 121 return -EINVAL; 122 } 123 124 if (count > (DB_ROOT_LEN - 1)) { 125 mutex_unlock(&g_tf_lock); 126 pr_err("db_root: count %d exceeds DB_ROOT_LEN-1: %u\n", 127 (int)count, DB_ROOT_LEN - 1); 128 return -EINVAL; 129 } 130 131 read_bytes = snprintf(db_root_stage, DB_ROOT_LEN, "%s", page); 132 if (!read_bytes) { 133 mutex_unlock(&g_tf_lock); 134 return -EINVAL; 135 } 136 if (db_root_stage[read_bytes - 1] == '\n') 137 db_root_stage[read_bytes - 1] = '\0'; 138 139 /* validate new db root before accepting it */ 140 fp = filp_open(db_root_stage, O_RDONLY, 0); 141 if (IS_ERR(fp)) { 142 mutex_unlock(&g_tf_lock); 143 pr_err("db_root: cannot open: %s\n", db_root_stage); 144 return -EINVAL; 145 } 146 if (!S_ISDIR(file_inode(fp)->i_mode)) { 147 filp_close(fp, NULL); 148 mutex_unlock(&g_tf_lock); 149 pr_err("db_root: not a directory: %s\n", db_root_stage); 150 return -EINVAL; 151 } 152 filp_close(fp, NULL); 153 154 strncpy(db_root, db_root_stage, read_bytes); 155 156 mutex_unlock(&g_tf_lock); 157 158 return read_bytes; 159 } 160 161 CONFIGFS_ATTR(target_core_item_, dbroot); 162 163 static struct target_fabric_configfs *target_core_get_fabric( 164 const char *name) 165 { 166 struct target_fabric_configfs *tf; 167 168 if (!name) 169 return NULL; 170 171 mutex_lock(&g_tf_lock); 172 list_for_each_entry(tf, &g_tf_list, tf_list) { 173 if (!strcmp(tf->tf_ops->name, name)) { 174 atomic_inc(&tf->tf_access_cnt); 175 mutex_unlock(&g_tf_lock); 176 return tf; 177 } 178 } 179 mutex_unlock(&g_tf_lock); 180 181 return NULL; 182 } 183 184 /* 185 * Called from struct target_core_group_ops->make_group() 186 */ 187 static struct config_group *target_core_register_fabric( 188 struct config_group *group, 189 const char *name) 190 { 191 struct target_fabric_configfs *tf; 192 int ret; 193 194 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:" 195 " %s\n", group, name); 196 197 tf = target_core_get_fabric(name); 198 if (!tf) { 199 pr_debug("target_core_register_fabric() trying autoload for %s\n", 200 name); 201 202 /* 203 * Below are some hardcoded request_module() calls to automatically 204 * local fabric modules when the following is called: 205 * 206 * mkdir -p /sys/kernel/config/target/$MODULE_NAME 207 * 208 * Note that this does not limit which TCM fabric module can be 209 * registered, but simply provids auto loading logic for modules with 210 * mkdir(2) system calls with known TCM fabric modules. 211 */ 212 213 if (!strncmp(name, "iscsi", 5)) { 214 /* 215 * Automatically load the LIO Target fabric module when the 216 * following is called: 217 * 218 * mkdir -p $CONFIGFS/target/iscsi 219 */ 220 ret = request_module("iscsi_target_mod"); 221 if (ret < 0) { 222 pr_debug("request_module() failed for" 223 " iscsi_target_mod.ko: %d\n", ret); 224 return ERR_PTR(-EINVAL); 225 } 226 } else if (!strncmp(name, "loopback", 8)) { 227 /* 228 * Automatically load the tcm_loop fabric module when the 229 * following is called: 230 * 231 * mkdir -p $CONFIGFS/target/loopback 232 */ 233 ret = request_module("tcm_loop"); 234 if (ret < 0) { 235 pr_debug("request_module() failed for" 236 " tcm_loop.ko: %d\n", ret); 237 return ERR_PTR(-EINVAL); 238 } 239 } 240 241 tf = target_core_get_fabric(name); 242 } 243 244 if (!tf) { 245 pr_debug("target_core_get_fabric() failed for %s\n", 246 name); 247 return ERR_PTR(-EINVAL); 248 } 249 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:" 250 " %s\n", tf->tf_ops->name); 251 /* 252 * On a successful target_core_get_fabric() look, the returned 253 * struct target_fabric_configfs *tf will contain a usage reference. 254 */ 255 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n", 256 &tf->tf_wwn_cit); 257 258 config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit); 259 260 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth", 261 &tf->tf_discovery_cit); 262 configfs_add_default_group(&tf->tf_disc_group, &tf->tf_group); 263 264 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:" 265 " %s\n", tf->tf_group.cg_item.ci_name); 266 return &tf->tf_group; 267 } 268 269 /* 270 * Called from struct target_core_group_ops->drop_item() 271 */ 272 static void target_core_deregister_fabric( 273 struct config_group *group, 274 struct config_item *item) 275 { 276 struct target_fabric_configfs *tf = container_of( 277 to_config_group(item), struct target_fabric_configfs, tf_group); 278 279 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in" 280 " tf list\n", config_item_name(item)); 281 282 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:" 283 " %s\n", tf->tf_ops->name); 284 atomic_dec(&tf->tf_access_cnt); 285 286 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci" 287 " %s\n", config_item_name(item)); 288 289 configfs_remove_default_groups(&tf->tf_group); 290 config_item_put(item); 291 } 292 293 static struct configfs_group_operations target_core_fabric_group_ops = { 294 .make_group = &target_core_register_fabric, 295 .drop_item = &target_core_deregister_fabric, 296 }; 297 298 /* 299 * All item attributes appearing in /sys/kernel/target/ appear here. 300 */ 301 static struct configfs_attribute *target_core_fabric_item_attrs[] = { 302 &target_core_item_attr_version, 303 &target_core_item_attr_dbroot, 304 NULL, 305 }; 306 307 /* 308 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/ 309 */ 310 static const struct config_item_type target_core_fabrics_item = { 311 .ct_group_ops = &target_core_fabric_group_ops, 312 .ct_attrs = target_core_fabric_item_attrs, 313 .ct_owner = THIS_MODULE, 314 }; 315 316 static struct configfs_subsystem target_core_fabrics = { 317 .su_group = { 318 .cg_item = { 319 .ci_namebuf = "target", 320 .ci_type = &target_core_fabrics_item, 321 }, 322 }, 323 }; 324 325 int target_depend_item(struct config_item *item) 326 { 327 return configfs_depend_item(&target_core_fabrics, item); 328 } 329 EXPORT_SYMBOL(target_depend_item); 330 331 void target_undepend_item(struct config_item *item) 332 { 333 return configfs_undepend_item(item); 334 } 335 EXPORT_SYMBOL(target_undepend_item); 336 337 /*############################################################################## 338 // Start functions called by external Target Fabrics Modules 339 //############################################################################*/ 340 341 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo) 342 { 343 if (!tfo->name) { 344 pr_err("Missing tfo->name\n"); 345 return -EINVAL; 346 } 347 if (strlen(tfo->name) >= TARGET_FABRIC_NAME_SIZE) { 348 pr_err("Passed name: %s exceeds TARGET_FABRIC" 349 "_NAME_SIZE\n", tfo->name); 350 return -EINVAL; 351 } 352 if (!tfo->get_fabric_name) { 353 pr_err("Missing tfo->get_fabric_name()\n"); 354 return -EINVAL; 355 } 356 if (!tfo->tpg_get_wwn) { 357 pr_err("Missing tfo->tpg_get_wwn()\n"); 358 return -EINVAL; 359 } 360 if (!tfo->tpg_get_tag) { 361 pr_err("Missing tfo->tpg_get_tag()\n"); 362 return -EINVAL; 363 } 364 if (!tfo->tpg_check_demo_mode) { 365 pr_err("Missing tfo->tpg_check_demo_mode()\n"); 366 return -EINVAL; 367 } 368 if (!tfo->tpg_check_demo_mode_cache) { 369 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n"); 370 return -EINVAL; 371 } 372 if (!tfo->tpg_check_demo_mode_write_protect) { 373 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n"); 374 return -EINVAL; 375 } 376 if (!tfo->tpg_check_prod_mode_write_protect) { 377 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n"); 378 return -EINVAL; 379 } 380 if (!tfo->tpg_get_inst_index) { 381 pr_err("Missing tfo->tpg_get_inst_index()\n"); 382 return -EINVAL; 383 } 384 if (!tfo->release_cmd) { 385 pr_err("Missing tfo->release_cmd()\n"); 386 return -EINVAL; 387 } 388 if (!tfo->sess_get_index) { 389 pr_err("Missing tfo->sess_get_index()\n"); 390 return -EINVAL; 391 } 392 if (!tfo->write_pending) { 393 pr_err("Missing tfo->write_pending()\n"); 394 return -EINVAL; 395 } 396 if (!tfo->write_pending_status) { 397 pr_err("Missing tfo->write_pending_status()\n"); 398 return -EINVAL; 399 } 400 if (!tfo->set_default_node_attributes) { 401 pr_err("Missing tfo->set_default_node_attributes()\n"); 402 return -EINVAL; 403 } 404 if (!tfo->get_cmd_state) { 405 pr_err("Missing tfo->get_cmd_state()\n"); 406 return -EINVAL; 407 } 408 if (!tfo->queue_data_in) { 409 pr_err("Missing tfo->queue_data_in()\n"); 410 return -EINVAL; 411 } 412 if (!tfo->queue_status) { 413 pr_err("Missing tfo->queue_status()\n"); 414 return -EINVAL; 415 } 416 if (!tfo->queue_tm_rsp) { 417 pr_err("Missing tfo->queue_tm_rsp()\n"); 418 return -EINVAL; 419 } 420 if (!tfo->aborted_task) { 421 pr_err("Missing tfo->aborted_task()\n"); 422 return -EINVAL; 423 } 424 if (!tfo->check_stop_free) { 425 pr_err("Missing tfo->check_stop_free()\n"); 426 return -EINVAL; 427 } 428 /* 429 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn() 430 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in 431 * target_core_fabric_configfs.c WWN+TPG group context code. 432 */ 433 if (!tfo->fabric_make_wwn) { 434 pr_err("Missing tfo->fabric_make_wwn()\n"); 435 return -EINVAL; 436 } 437 if (!tfo->fabric_drop_wwn) { 438 pr_err("Missing tfo->fabric_drop_wwn()\n"); 439 return -EINVAL; 440 } 441 if (!tfo->fabric_make_tpg) { 442 pr_err("Missing tfo->fabric_make_tpg()\n"); 443 return -EINVAL; 444 } 445 if (!tfo->fabric_drop_tpg) { 446 pr_err("Missing tfo->fabric_drop_tpg()\n"); 447 return -EINVAL; 448 } 449 450 return 0; 451 } 452 453 int target_register_template(const struct target_core_fabric_ops *fo) 454 { 455 struct target_fabric_configfs *tf; 456 int ret; 457 458 ret = target_fabric_tf_ops_check(fo); 459 if (ret) 460 return ret; 461 462 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL); 463 if (!tf) { 464 pr_err("%s: could not allocate memory!\n", __func__); 465 return -ENOMEM; 466 } 467 468 INIT_LIST_HEAD(&tf->tf_list); 469 atomic_set(&tf->tf_access_cnt, 0); 470 tf->tf_ops = fo; 471 target_fabric_setup_cits(tf); 472 473 mutex_lock(&g_tf_lock); 474 list_add_tail(&tf->tf_list, &g_tf_list); 475 mutex_unlock(&g_tf_lock); 476 477 return 0; 478 } 479 EXPORT_SYMBOL(target_register_template); 480 481 void target_unregister_template(const struct target_core_fabric_ops *fo) 482 { 483 struct target_fabric_configfs *t; 484 485 mutex_lock(&g_tf_lock); 486 list_for_each_entry(t, &g_tf_list, tf_list) { 487 if (!strcmp(t->tf_ops->name, fo->name)) { 488 BUG_ON(atomic_read(&t->tf_access_cnt)); 489 list_del(&t->tf_list); 490 mutex_unlock(&g_tf_lock); 491 /* 492 * Wait for any outstanding fabric se_deve_entry->rcu_head 493 * callbacks to complete post kfree_rcu(), before allowing 494 * fabric driver unload of TFO->module to proceed. 495 */ 496 rcu_barrier(); 497 kfree(t); 498 return; 499 } 500 } 501 mutex_unlock(&g_tf_lock); 502 } 503 EXPORT_SYMBOL(target_unregister_template); 504 505 /*############################################################################## 506 // Stop functions called by external Target Fabrics Modules 507 //############################################################################*/ 508 509 static inline struct se_dev_attrib *to_attrib(struct config_item *item) 510 { 511 return container_of(to_config_group(item), struct se_dev_attrib, 512 da_group); 513 } 514 515 /* Start functions for struct config_item_type tb_dev_attrib_cit */ 516 #define DEF_CONFIGFS_ATTRIB_SHOW(_name) \ 517 static ssize_t _name##_show(struct config_item *item, char *page) \ 518 { \ 519 return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \ 520 } 521 522 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias); 523 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo); 524 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write); 525 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read); 526 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache); 527 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl); 528 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas); 529 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu); 530 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws); 531 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw); 532 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc); 533 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type); 534 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type); 535 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_format); 536 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify); 537 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids); 538 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot); 539 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord); 540 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl); 541 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size); 542 DEF_CONFIGFS_ATTRIB_SHOW(block_size); 543 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors); 544 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors); 545 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth); 546 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth); 547 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count); 548 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count); 549 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity); 550 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment); 551 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data); 552 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len); 553 554 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \ 555 static ssize_t _name##_store(struct config_item *item, const char *page,\ 556 size_t count) \ 557 { \ 558 struct se_dev_attrib *da = to_attrib(item); \ 559 u32 val; \ 560 int ret; \ 561 \ 562 ret = kstrtou32(page, 0, &val); \ 563 if (ret < 0) \ 564 return ret; \ 565 da->_name = val; \ 566 return count; \ 567 } 568 569 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count); 570 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count); 571 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity); 572 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment); 573 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len); 574 575 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \ 576 static ssize_t _name##_store(struct config_item *item, const char *page, \ 577 size_t count) \ 578 { \ 579 struct se_dev_attrib *da = to_attrib(item); \ 580 bool flag; \ 581 int ret; \ 582 \ 583 ret = strtobool(page, &flag); \ 584 if (ret < 0) \ 585 return ret; \ 586 da->_name = flag; \ 587 return count; \ 588 } 589 590 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write); 591 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw); 592 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc); 593 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids); 594 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot); 595 596 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \ 597 static ssize_t _name##_store(struct config_item *item, const char *page,\ 598 size_t count) \ 599 { \ 600 printk_once(KERN_WARNING \ 601 "ignoring deprecated %s attribute\n", \ 602 __stringify(_name)); \ 603 return count; \ 604 } 605 606 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo); 607 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read); 608 609 static void dev_set_t10_wwn_model_alias(struct se_device *dev) 610 { 611 const char *configname; 612 613 configname = config_item_name(&dev->dev_group.cg_item); 614 if (strlen(configname) >= 16) { 615 pr_warn("dev[%p]: Backstore name '%s' is too long for " 616 "INQUIRY_MODEL, truncating to 16 bytes\n", dev, 617 configname); 618 } 619 snprintf(&dev->t10_wwn.model[0], 16, "%s", configname); 620 } 621 622 static ssize_t emulate_model_alias_store(struct config_item *item, 623 const char *page, size_t count) 624 { 625 struct se_dev_attrib *da = to_attrib(item); 626 struct se_device *dev = da->da_dev; 627 bool flag; 628 int ret; 629 630 if (dev->export_count) { 631 pr_err("dev[%p]: Unable to change model alias" 632 " while export_count is %d\n", 633 dev, dev->export_count); 634 return -EINVAL; 635 } 636 637 ret = strtobool(page, &flag); 638 if (ret < 0) 639 return ret; 640 641 if (flag) { 642 dev_set_t10_wwn_model_alias(dev); 643 } else { 644 strncpy(&dev->t10_wwn.model[0], 645 dev->transport->inquiry_prod, 16); 646 } 647 da->emulate_model_alias = flag; 648 return count; 649 } 650 651 static ssize_t emulate_write_cache_store(struct config_item *item, 652 const char *page, size_t count) 653 { 654 struct se_dev_attrib *da = to_attrib(item); 655 bool flag; 656 int ret; 657 658 ret = strtobool(page, &flag); 659 if (ret < 0) 660 return ret; 661 662 if (flag && da->da_dev->transport->get_write_cache) { 663 pr_err("emulate_write_cache not supported for this device\n"); 664 return -EINVAL; 665 } 666 667 da->emulate_write_cache = flag; 668 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 669 da->da_dev, flag); 670 return count; 671 } 672 673 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item, 674 const char *page, size_t count) 675 { 676 struct se_dev_attrib *da = to_attrib(item); 677 u32 val; 678 int ret; 679 680 ret = kstrtou32(page, 0, &val); 681 if (ret < 0) 682 return ret; 683 684 if (val != 0 && val != 1 && val != 2) { 685 pr_err("Illegal value %d\n", val); 686 return -EINVAL; 687 } 688 689 if (da->da_dev->export_count) { 690 pr_err("dev[%p]: Unable to change SE Device" 691 " UA_INTRLCK_CTRL while export_count is %d\n", 692 da->da_dev, da->da_dev->export_count); 693 return -EINVAL; 694 } 695 da->emulate_ua_intlck_ctrl = val; 696 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 697 da->da_dev, val); 698 return count; 699 } 700 701 static ssize_t emulate_tas_store(struct config_item *item, 702 const char *page, size_t count) 703 { 704 struct se_dev_attrib *da = to_attrib(item); 705 bool flag; 706 int ret; 707 708 ret = strtobool(page, &flag); 709 if (ret < 0) 710 return ret; 711 712 if (da->da_dev->export_count) { 713 pr_err("dev[%p]: Unable to change SE Device TAS while" 714 " export_count is %d\n", 715 da->da_dev, da->da_dev->export_count); 716 return -EINVAL; 717 } 718 da->emulate_tas = flag; 719 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 720 da->da_dev, flag ? "Enabled" : "Disabled"); 721 722 return count; 723 } 724 725 static ssize_t emulate_tpu_store(struct config_item *item, 726 const char *page, size_t count) 727 { 728 struct se_dev_attrib *da = to_attrib(item); 729 bool flag; 730 int ret; 731 732 ret = strtobool(page, &flag); 733 if (ret < 0) 734 return ret; 735 736 /* 737 * We expect this value to be non-zero when generic Block Layer 738 * Discard supported is detected iblock_create_virtdevice(). 739 */ 740 if (flag && !da->max_unmap_block_desc_count) { 741 pr_err("Generic Block Discard not supported\n"); 742 return -ENOSYS; 743 } 744 745 da->emulate_tpu = flag; 746 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 747 da->da_dev, flag); 748 return count; 749 } 750 751 static ssize_t emulate_tpws_store(struct config_item *item, 752 const char *page, size_t count) 753 { 754 struct se_dev_attrib *da = to_attrib(item); 755 bool flag; 756 int ret; 757 758 ret = strtobool(page, &flag); 759 if (ret < 0) 760 return ret; 761 762 /* 763 * We expect this value to be non-zero when generic Block Layer 764 * Discard supported is detected iblock_create_virtdevice(). 765 */ 766 if (flag && !da->max_unmap_block_desc_count) { 767 pr_err("Generic Block Discard not supported\n"); 768 return -ENOSYS; 769 } 770 771 da->emulate_tpws = flag; 772 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 773 da->da_dev, flag); 774 return count; 775 } 776 777 static ssize_t pi_prot_type_store(struct config_item *item, 778 const char *page, size_t count) 779 { 780 struct se_dev_attrib *da = to_attrib(item); 781 int old_prot = da->pi_prot_type, ret; 782 struct se_device *dev = da->da_dev; 783 u32 flag; 784 785 ret = kstrtou32(page, 0, &flag); 786 if (ret < 0) 787 return ret; 788 789 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) { 790 pr_err("Illegal value %d for pi_prot_type\n", flag); 791 return -EINVAL; 792 } 793 if (flag == 2) { 794 pr_err("DIF TYPE2 protection currently not supported\n"); 795 return -ENOSYS; 796 } 797 if (da->hw_pi_prot_type) { 798 pr_warn("DIF protection enabled on underlying hardware," 799 " ignoring\n"); 800 return count; 801 } 802 if (!dev->transport->init_prot || !dev->transport->free_prot) { 803 /* 0 is only allowed value for non-supporting backends */ 804 if (flag == 0) 805 return count; 806 807 pr_err("DIF protection not supported by backend: %s\n", 808 dev->transport->name); 809 return -ENOSYS; 810 } 811 if (!(dev->dev_flags & DF_CONFIGURED)) { 812 pr_err("DIF protection requires device to be configured\n"); 813 return -ENODEV; 814 } 815 if (dev->export_count) { 816 pr_err("dev[%p]: Unable to change SE Device PROT type while" 817 " export_count is %d\n", dev, dev->export_count); 818 return -EINVAL; 819 } 820 821 da->pi_prot_type = flag; 822 823 if (flag && !old_prot) { 824 ret = dev->transport->init_prot(dev); 825 if (ret) { 826 da->pi_prot_type = old_prot; 827 da->pi_prot_verify = (bool) da->pi_prot_type; 828 return ret; 829 } 830 831 } else if (!flag && old_prot) { 832 dev->transport->free_prot(dev); 833 } 834 835 da->pi_prot_verify = (bool) da->pi_prot_type; 836 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag); 837 return count; 838 } 839 840 static ssize_t pi_prot_format_store(struct config_item *item, 841 const char *page, size_t count) 842 { 843 struct se_dev_attrib *da = to_attrib(item); 844 struct se_device *dev = da->da_dev; 845 bool flag; 846 int ret; 847 848 ret = strtobool(page, &flag); 849 if (ret < 0) 850 return ret; 851 852 if (!flag) 853 return count; 854 855 if (!dev->transport->format_prot) { 856 pr_err("DIF protection format not supported by backend %s\n", 857 dev->transport->name); 858 return -ENOSYS; 859 } 860 if (!(dev->dev_flags & DF_CONFIGURED)) { 861 pr_err("DIF protection format requires device to be configured\n"); 862 return -ENODEV; 863 } 864 if (dev->export_count) { 865 pr_err("dev[%p]: Unable to format SE Device PROT type while" 866 " export_count is %d\n", dev, dev->export_count); 867 return -EINVAL; 868 } 869 870 ret = dev->transport->format_prot(dev); 871 if (ret) 872 return ret; 873 874 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev); 875 return count; 876 } 877 878 static ssize_t pi_prot_verify_store(struct config_item *item, 879 const char *page, size_t count) 880 { 881 struct se_dev_attrib *da = to_attrib(item); 882 bool flag; 883 int ret; 884 885 ret = strtobool(page, &flag); 886 if (ret < 0) 887 return ret; 888 889 if (!flag) { 890 da->pi_prot_verify = flag; 891 return count; 892 } 893 if (da->hw_pi_prot_type) { 894 pr_warn("DIF protection enabled on underlying hardware," 895 " ignoring\n"); 896 return count; 897 } 898 if (!da->pi_prot_type) { 899 pr_warn("DIF protection not supported by backend, ignoring\n"); 900 return count; 901 } 902 da->pi_prot_verify = flag; 903 904 return count; 905 } 906 907 static ssize_t force_pr_aptpl_store(struct config_item *item, 908 const char *page, size_t count) 909 { 910 struct se_dev_attrib *da = to_attrib(item); 911 bool flag; 912 int ret; 913 914 ret = strtobool(page, &flag); 915 if (ret < 0) 916 return ret; 917 if (da->da_dev->export_count) { 918 pr_err("dev[%p]: Unable to set force_pr_aptpl while" 919 " export_count is %d\n", 920 da->da_dev, da->da_dev->export_count); 921 return -EINVAL; 922 } 923 924 da->force_pr_aptpl = flag; 925 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag); 926 return count; 927 } 928 929 static ssize_t emulate_rest_reord_store(struct config_item *item, 930 const char *page, size_t count) 931 { 932 struct se_dev_attrib *da = to_attrib(item); 933 bool flag; 934 int ret; 935 936 ret = strtobool(page, &flag); 937 if (ret < 0) 938 return ret; 939 940 if (flag != 0) { 941 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted" 942 " reordering not implemented\n", da->da_dev); 943 return -ENOSYS; 944 } 945 da->emulate_rest_reord = flag; 946 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", 947 da->da_dev, flag); 948 return count; 949 } 950 951 static ssize_t unmap_zeroes_data_store(struct config_item *item, 952 const char *page, size_t count) 953 { 954 struct se_dev_attrib *da = to_attrib(item); 955 bool flag; 956 int ret; 957 958 ret = strtobool(page, &flag); 959 if (ret < 0) 960 return ret; 961 962 if (da->da_dev->export_count) { 963 pr_err("dev[%p]: Unable to change SE Device" 964 " unmap_zeroes_data while export_count is %d\n", 965 da->da_dev, da->da_dev->export_count); 966 return -EINVAL; 967 } 968 /* 969 * We expect this value to be non-zero when generic Block Layer 970 * Discard supported is detected iblock_configure_device(). 971 */ 972 if (flag && !da->max_unmap_block_desc_count) { 973 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set" 974 " because max_unmap_block_desc_count is zero\n", 975 da->da_dev); 976 return -ENOSYS; 977 } 978 da->unmap_zeroes_data = flag; 979 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n", 980 da->da_dev, flag); 981 return count; 982 } 983 984 /* 985 * Note, this can only be called on unexported SE Device Object. 986 */ 987 static ssize_t queue_depth_store(struct config_item *item, 988 const char *page, size_t count) 989 { 990 struct se_dev_attrib *da = to_attrib(item); 991 struct se_device *dev = da->da_dev; 992 u32 val; 993 int ret; 994 995 ret = kstrtou32(page, 0, &val); 996 if (ret < 0) 997 return ret; 998 999 if (dev->export_count) { 1000 pr_err("dev[%p]: Unable to change SE Device TCQ while" 1001 " export_count is %d\n", 1002 dev, dev->export_count); 1003 return -EINVAL; 1004 } 1005 if (!val) { 1006 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev); 1007 return -EINVAL; 1008 } 1009 1010 if (val > dev->dev_attrib.queue_depth) { 1011 if (val > dev->dev_attrib.hw_queue_depth) { 1012 pr_err("dev[%p]: Passed queue_depth:" 1013 " %u exceeds TCM/SE_Device MAX" 1014 " TCQ: %u\n", dev, val, 1015 dev->dev_attrib.hw_queue_depth); 1016 return -EINVAL; 1017 } 1018 } 1019 da->queue_depth = dev->queue_depth = val; 1020 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val); 1021 return count; 1022 } 1023 1024 static ssize_t optimal_sectors_store(struct config_item *item, 1025 const char *page, size_t count) 1026 { 1027 struct se_dev_attrib *da = to_attrib(item); 1028 u32 val; 1029 int ret; 1030 1031 ret = kstrtou32(page, 0, &val); 1032 if (ret < 0) 1033 return ret; 1034 1035 if (da->da_dev->export_count) { 1036 pr_err("dev[%p]: Unable to change SE Device" 1037 " optimal_sectors while export_count is %d\n", 1038 da->da_dev, da->da_dev->export_count); 1039 return -EINVAL; 1040 } 1041 if (val > da->hw_max_sectors) { 1042 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1043 " greater than hw_max_sectors: %u\n", 1044 da->da_dev, val, da->hw_max_sectors); 1045 return -EINVAL; 1046 } 1047 1048 da->optimal_sectors = val; 1049 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1050 da->da_dev, val); 1051 return count; 1052 } 1053 1054 static ssize_t block_size_store(struct config_item *item, 1055 const char *page, size_t count) 1056 { 1057 struct se_dev_attrib *da = to_attrib(item); 1058 u32 val; 1059 int ret; 1060 1061 ret = kstrtou32(page, 0, &val); 1062 if (ret < 0) 1063 return ret; 1064 1065 if (da->da_dev->export_count) { 1066 pr_err("dev[%p]: Unable to change SE Device block_size" 1067 " while export_count is %d\n", 1068 da->da_dev, da->da_dev->export_count); 1069 return -EINVAL; 1070 } 1071 1072 if (val != 512 && val != 1024 && val != 2048 && val != 4096) { 1073 pr_err("dev[%p]: Illegal value for block_device: %u" 1074 " for SE device, must be 512, 1024, 2048 or 4096\n", 1075 da->da_dev, val); 1076 return -EINVAL; 1077 } 1078 1079 da->block_size = val; 1080 if (da->max_bytes_per_io) 1081 da->hw_max_sectors = da->max_bytes_per_io / val; 1082 1083 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1084 da->da_dev, val); 1085 return count; 1086 } 1087 1088 static ssize_t alua_support_show(struct config_item *item, char *page) 1089 { 1090 struct se_dev_attrib *da = to_attrib(item); 1091 u8 flags = da->da_dev->transport->transport_flags; 1092 1093 return snprintf(page, PAGE_SIZE, "%d\n", 1094 flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1); 1095 } 1096 1097 static ssize_t pgr_support_show(struct config_item *item, char *page) 1098 { 1099 struct se_dev_attrib *da = to_attrib(item); 1100 u8 flags = da->da_dev->transport->transport_flags; 1101 1102 return snprintf(page, PAGE_SIZE, "%d\n", 1103 flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1); 1104 } 1105 1106 CONFIGFS_ATTR(, emulate_model_alias); 1107 CONFIGFS_ATTR(, emulate_dpo); 1108 CONFIGFS_ATTR(, emulate_fua_write); 1109 CONFIGFS_ATTR(, emulate_fua_read); 1110 CONFIGFS_ATTR(, emulate_write_cache); 1111 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl); 1112 CONFIGFS_ATTR(, emulate_tas); 1113 CONFIGFS_ATTR(, emulate_tpu); 1114 CONFIGFS_ATTR(, emulate_tpws); 1115 CONFIGFS_ATTR(, emulate_caw); 1116 CONFIGFS_ATTR(, emulate_3pc); 1117 CONFIGFS_ATTR(, pi_prot_type); 1118 CONFIGFS_ATTR_RO(, hw_pi_prot_type); 1119 CONFIGFS_ATTR(, pi_prot_format); 1120 CONFIGFS_ATTR(, pi_prot_verify); 1121 CONFIGFS_ATTR(, enforce_pr_isids); 1122 CONFIGFS_ATTR(, is_nonrot); 1123 CONFIGFS_ATTR(, emulate_rest_reord); 1124 CONFIGFS_ATTR(, force_pr_aptpl); 1125 CONFIGFS_ATTR_RO(, hw_block_size); 1126 CONFIGFS_ATTR(, block_size); 1127 CONFIGFS_ATTR_RO(, hw_max_sectors); 1128 CONFIGFS_ATTR(, optimal_sectors); 1129 CONFIGFS_ATTR_RO(, hw_queue_depth); 1130 CONFIGFS_ATTR(, queue_depth); 1131 CONFIGFS_ATTR(, max_unmap_lba_count); 1132 CONFIGFS_ATTR(, max_unmap_block_desc_count); 1133 CONFIGFS_ATTR(, unmap_granularity); 1134 CONFIGFS_ATTR(, unmap_granularity_alignment); 1135 CONFIGFS_ATTR(, unmap_zeroes_data); 1136 CONFIGFS_ATTR(, max_write_same_len); 1137 CONFIGFS_ATTR_RO(, alua_support); 1138 CONFIGFS_ATTR_RO(, pgr_support); 1139 1140 /* 1141 * dev_attrib attributes for devices using the target core SBC/SPC 1142 * interpreter. Any backend using spc_parse_cdb should be using 1143 * these. 1144 */ 1145 struct configfs_attribute *sbc_attrib_attrs[] = { 1146 &attr_emulate_model_alias, 1147 &attr_emulate_dpo, 1148 &attr_emulate_fua_write, 1149 &attr_emulate_fua_read, 1150 &attr_emulate_write_cache, 1151 &attr_emulate_ua_intlck_ctrl, 1152 &attr_emulate_tas, 1153 &attr_emulate_tpu, 1154 &attr_emulate_tpws, 1155 &attr_emulate_caw, 1156 &attr_emulate_3pc, 1157 &attr_pi_prot_type, 1158 &attr_hw_pi_prot_type, 1159 &attr_pi_prot_format, 1160 &attr_pi_prot_verify, 1161 &attr_enforce_pr_isids, 1162 &attr_is_nonrot, 1163 &attr_emulate_rest_reord, 1164 &attr_force_pr_aptpl, 1165 &attr_hw_block_size, 1166 &attr_block_size, 1167 &attr_hw_max_sectors, 1168 &attr_optimal_sectors, 1169 &attr_hw_queue_depth, 1170 &attr_queue_depth, 1171 &attr_max_unmap_lba_count, 1172 &attr_max_unmap_block_desc_count, 1173 &attr_unmap_granularity, 1174 &attr_unmap_granularity_alignment, 1175 &attr_unmap_zeroes_data, 1176 &attr_max_write_same_len, 1177 &attr_alua_support, 1178 &attr_pgr_support, 1179 NULL, 1180 }; 1181 EXPORT_SYMBOL(sbc_attrib_attrs); 1182 1183 /* 1184 * Minimal dev_attrib attributes for devices passing through CDBs. 1185 * In this case we only provide a few read-only attributes for 1186 * backwards compatibility. 1187 */ 1188 struct configfs_attribute *passthrough_attrib_attrs[] = { 1189 &attr_hw_pi_prot_type, 1190 &attr_hw_block_size, 1191 &attr_hw_max_sectors, 1192 &attr_hw_queue_depth, 1193 &attr_alua_support, 1194 &attr_pgr_support, 1195 NULL, 1196 }; 1197 EXPORT_SYMBOL(passthrough_attrib_attrs); 1198 1199 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL); 1200 TB_CIT_SETUP_DRV(dev_action, NULL, NULL); 1201 1202 /* End functions for struct config_item_type tb_dev_attrib_cit */ 1203 1204 /* Start functions for struct config_item_type tb_dev_wwn_cit */ 1205 1206 static struct t10_wwn *to_t10_wwn(struct config_item *item) 1207 { 1208 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group); 1209 } 1210 1211 /* 1212 * VPD page 0x80 Unit serial 1213 */ 1214 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item, 1215 char *page) 1216 { 1217 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 1218 &to_t10_wwn(item)->unit_serial[0]); 1219 } 1220 1221 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item, 1222 const char *page, size_t count) 1223 { 1224 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1225 struct se_device *dev = t10_wwn->t10_dev; 1226 unsigned char buf[INQUIRY_VPD_SERIAL_LEN]; 1227 1228 /* 1229 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 1230 * from the struct scsi_device level firmware, do not allow 1231 * VPD Unit Serial to be emulated. 1232 * 1233 * Note this struct scsi_device could also be emulating VPD 1234 * information from its drivers/scsi LLD. But for now we assume 1235 * it is doing 'the right thing' wrt a world wide unique 1236 * VPD Unit Serial Number that OS dependent multipath can depend on. 1237 */ 1238 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) { 1239 pr_err("Underlying SCSI device firmware provided VPD" 1240 " Unit Serial, ignoring request\n"); 1241 return -EOPNOTSUPP; 1242 } 1243 1244 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 1245 pr_err("Emulated VPD Unit Serial exceeds" 1246 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 1247 return -EOVERFLOW; 1248 } 1249 /* 1250 * Check to see if any active $FABRIC_MOD exports exist. If they 1251 * do exist, fail here as changing this information on the fly 1252 * (underneath the initiator side OS dependent multipath code) 1253 * could cause negative effects. 1254 */ 1255 if (dev->export_count) { 1256 pr_err("Unable to set VPD Unit Serial while" 1257 " active %d $FABRIC_MOD exports exist\n", 1258 dev->export_count); 1259 return -EINVAL; 1260 } 1261 1262 /* 1263 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 1264 * 1265 * Also, strip any newline added from the userspace 1266 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 1267 */ 1268 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN); 1269 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 1270 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 1271 "%s", strstrip(buf)); 1272 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL; 1273 1274 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 1275 " %s\n", dev->t10_wwn.unit_serial); 1276 1277 return count; 1278 } 1279 1280 /* 1281 * VPD page 0x83 Protocol Identifier 1282 */ 1283 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item, 1284 char *page) 1285 { 1286 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1287 struct t10_vpd *vpd; 1288 unsigned char buf[VPD_TMP_BUF_SIZE]; 1289 ssize_t len = 0; 1290 1291 memset(buf, 0, VPD_TMP_BUF_SIZE); 1292 1293 spin_lock(&t10_wwn->t10_vpd_lock); 1294 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 1295 if (!vpd->protocol_identifier_set) 1296 continue; 1297 1298 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 1299 1300 if (len + strlen(buf) >= PAGE_SIZE) 1301 break; 1302 1303 len += sprintf(page+len, "%s", buf); 1304 } 1305 spin_unlock(&t10_wwn->t10_vpd_lock); 1306 1307 return len; 1308 } 1309 1310 /* 1311 * Generic wrapper for dumping VPD identifiers by association. 1312 */ 1313 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 1314 static ssize_t target_wwn_##_name##_show(struct config_item *item, \ 1315 char *page) \ 1316 { \ 1317 struct t10_wwn *t10_wwn = to_t10_wwn(item); \ 1318 struct t10_vpd *vpd; \ 1319 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 1320 ssize_t len = 0; \ 1321 \ 1322 spin_lock(&t10_wwn->t10_vpd_lock); \ 1323 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 1324 if (vpd->association != _assoc) \ 1325 continue; \ 1326 \ 1327 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1328 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 1329 if (len + strlen(buf) >= PAGE_SIZE) \ 1330 break; \ 1331 len += sprintf(page+len, "%s", buf); \ 1332 \ 1333 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1334 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 1335 if (len + strlen(buf) >= PAGE_SIZE) \ 1336 break; \ 1337 len += sprintf(page+len, "%s", buf); \ 1338 \ 1339 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1340 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 1341 if (len + strlen(buf) >= PAGE_SIZE) \ 1342 break; \ 1343 len += sprintf(page+len, "%s", buf); \ 1344 } \ 1345 spin_unlock(&t10_wwn->t10_vpd_lock); \ 1346 \ 1347 return len; \ 1348 } 1349 1350 /* VPD page 0x83 Association: Logical Unit */ 1351 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 1352 /* VPD page 0x83 Association: Target Port */ 1353 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 1354 /* VPD page 0x83 Association: SCSI Target Device */ 1355 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 1356 1357 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial); 1358 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier); 1359 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit); 1360 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port); 1361 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device); 1362 1363 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 1364 &target_wwn_attr_vpd_unit_serial, 1365 &target_wwn_attr_vpd_protocol_identifier, 1366 &target_wwn_attr_vpd_assoc_logical_unit, 1367 &target_wwn_attr_vpd_assoc_target_port, 1368 &target_wwn_attr_vpd_assoc_scsi_target_device, 1369 NULL, 1370 }; 1371 1372 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs); 1373 1374 /* End functions for struct config_item_type tb_dev_wwn_cit */ 1375 1376 /* Start functions for struct config_item_type tb_dev_pr_cit */ 1377 1378 static struct se_device *pr_to_dev(struct config_item *item) 1379 { 1380 return container_of(to_config_group(item), struct se_device, 1381 dev_pr_group); 1382 } 1383 1384 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev, 1385 char *page) 1386 { 1387 struct se_node_acl *se_nacl; 1388 struct t10_pr_registration *pr_reg; 1389 char i_buf[PR_REG_ISID_ID_LEN]; 1390 1391 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1392 1393 pr_reg = dev->dev_pr_res_holder; 1394 if (!pr_reg) 1395 return sprintf(page, "No SPC-3 Reservation holder\n"); 1396 1397 se_nacl = pr_reg->pr_reg_nacl; 1398 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1399 1400 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", 1401 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 1402 se_nacl->initiatorname, i_buf); 1403 } 1404 1405 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, 1406 char *page) 1407 { 1408 struct se_node_acl *se_nacl; 1409 ssize_t len; 1410 1411 se_nacl = dev->dev_reserved_node_acl; 1412 if (se_nacl) { 1413 len = sprintf(page, 1414 "SPC-2 Reservation: %s Initiator: %s\n", 1415 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 1416 se_nacl->initiatorname); 1417 } else { 1418 len = sprintf(page, "No SPC-2 Reservation holder\n"); 1419 } 1420 return len; 1421 } 1422 1423 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page) 1424 { 1425 struct se_device *dev = pr_to_dev(item); 1426 int ret; 1427 1428 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1429 return sprintf(page, "Passthrough\n"); 1430 1431 spin_lock(&dev->dev_reservation_lock); 1432 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1433 ret = target_core_dev_pr_show_spc2_res(dev, page); 1434 else 1435 ret = target_core_dev_pr_show_spc3_res(dev, page); 1436 spin_unlock(&dev->dev_reservation_lock); 1437 return ret; 1438 } 1439 1440 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item, 1441 char *page) 1442 { 1443 struct se_device *dev = pr_to_dev(item); 1444 ssize_t len = 0; 1445 1446 spin_lock(&dev->dev_reservation_lock); 1447 if (!dev->dev_pr_res_holder) { 1448 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1449 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { 1450 len = sprintf(page, "SPC-3 Reservation: All Target" 1451 " Ports registration\n"); 1452 } else { 1453 len = sprintf(page, "SPC-3 Reservation: Single" 1454 " Target Port registration\n"); 1455 } 1456 1457 spin_unlock(&dev->dev_reservation_lock); 1458 return len; 1459 } 1460 1461 static ssize_t target_pr_res_pr_generation_show(struct config_item *item, 1462 char *page) 1463 { 1464 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation); 1465 } 1466 1467 1468 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item, 1469 char *page) 1470 { 1471 struct se_device *dev = pr_to_dev(item); 1472 struct se_node_acl *se_nacl; 1473 struct se_portal_group *se_tpg; 1474 struct t10_pr_registration *pr_reg; 1475 const struct target_core_fabric_ops *tfo; 1476 ssize_t len = 0; 1477 1478 spin_lock(&dev->dev_reservation_lock); 1479 pr_reg = dev->dev_pr_res_holder; 1480 if (!pr_reg) { 1481 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1482 goto out_unlock; 1483 } 1484 1485 se_nacl = pr_reg->pr_reg_nacl; 1486 se_tpg = se_nacl->se_tpg; 1487 tfo = se_tpg->se_tpg_tfo; 1488 1489 len += sprintf(page+len, "SPC-3 Reservation: %s" 1490 " Target Node Endpoint: %s\n", tfo->get_fabric_name(), 1491 tfo->tpg_get_wwn(se_tpg)); 1492 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1493 " Identifier Tag: %hu %s Portal Group Tag: %hu" 1494 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi, 1495 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg), 1496 tfo->get_fabric_name(), pr_reg->pr_aptpl_target_lun); 1497 1498 out_unlock: 1499 spin_unlock(&dev->dev_reservation_lock); 1500 return len; 1501 } 1502 1503 1504 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item, 1505 char *page) 1506 { 1507 struct se_device *dev = pr_to_dev(item); 1508 const struct target_core_fabric_ops *tfo; 1509 struct t10_pr_registration *pr_reg; 1510 unsigned char buf[384]; 1511 char i_buf[PR_REG_ISID_ID_LEN]; 1512 ssize_t len = 0; 1513 int reg_count = 0; 1514 1515 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1516 1517 spin_lock(&dev->t10_pr.registration_lock); 1518 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1519 pr_reg_list) { 1520 1521 memset(buf, 0, 384); 1522 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1523 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1524 core_pr_dump_initiator_port(pr_reg, i_buf, 1525 PR_REG_ISID_ID_LEN); 1526 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1527 tfo->get_fabric_name(), 1528 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, 1529 pr_reg->pr_res_generation); 1530 1531 if (len + strlen(buf) >= PAGE_SIZE) 1532 break; 1533 1534 len += sprintf(page+len, "%s", buf); 1535 reg_count++; 1536 } 1537 spin_unlock(&dev->t10_pr.registration_lock); 1538 1539 if (!reg_count) 1540 len += sprintf(page+len, "None\n"); 1541 1542 return len; 1543 } 1544 1545 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page) 1546 { 1547 struct se_device *dev = pr_to_dev(item); 1548 struct t10_pr_registration *pr_reg; 1549 ssize_t len = 0; 1550 1551 spin_lock(&dev->dev_reservation_lock); 1552 pr_reg = dev->dev_pr_res_holder; 1553 if (pr_reg) { 1554 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1555 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 1556 } else { 1557 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1558 } 1559 1560 spin_unlock(&dev->dev_reservation_lock); 1561 return len; 1562 } 1563 1564 static ssize_t target_pr_res_type_show(struct config_item *item, char *page) 1565 { 1566 struct se_device *dev = pr_to_dev(item); 1567 1568 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1569 return sprintf(page, "SPC_PASSTHROUGH\n"); 1570 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1571 return sprintf(page, "SPC2_RESERVATIONS\n"); 1572 else 1573 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 1574 } 1575 1576 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item, 1577 char *page) 1578 { 1579 struct se_device *dev = pr_to_dev(item); 1580 1581 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1582 return 0; 1583 1584 return sprintf(page, "APTPL Bit Status: %s\n", 1585 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 1586 } 1587 1588 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item, 1589 char *page) 1590 { 1591 struct se_device *dev = pr_to_dev(item); 1592 1593 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1594 return 0; 1595 1596 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 1597 } 1598 1599 enum { 1600 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 1601 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 1602 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 1603 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 1604 }; 1605 1606 static match_table_t tokens = { 1607 {Opt_initiator_fabric, "initiator_fabric=%s"}, 1608 {Opt_initiator_node, "initiator_node=%s"}, 1609 {Opt_initiator_sid, "initiator_sid=%s"}, 1610 {Opt_sa_res_key, "sa_res_key=%s"}, 1611 {Opt_res_holder, "res_holder=%d"}, 1612 {Opt_res_type, "res_type=%d"}, 1613 {Opt_res_scope, "res_scope=%d"}, 1614 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 1615 {Opt_mapped_lun, "mapped_lun=%u"}, 1616 {Opt_target_fabric, "target_fabric=%s"}, 1617 {Opt_target_node, "target_node=%s"}, 1618 {Opt_tpgt, "tpgt=%d"}, 1619 {Opt_port_rtpi, "port_rtpi=%d"}, 1620 {Opt_target_lun, "target_lun=%u"}, 1621 {Opt_err, NULL} 1622 }; 1623 1624 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item, 1625 const char *page, size_t count) 1626 { 1627 struct se_device *dev = pr_to_dev(item); 1628 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 1629 unsigned char *t_fabric = NULL, *t_port = NULL; 1630 char *orig, *ptr, *opts; 1631 substring_t args[MAX_OPT_ARGS]; 1632 unsigned long long tmp_ll; 1633 u64 sa_res_key = 0; 1634 u64 mapped_lun = 0, target_lun = 0; 1635 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 1636 u16 tpgt = 0; 1637 u8 type = 0; 1638 1639 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1640 return count; 1641 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1642 return count; 1643 1644 if (dev->export_count) { 1645 pr_debug("Unable to process APTPL metadata while" 1646 " active fabric exports exist\n"); 1647 return -EINVAL; 1648 } 1649 1650 opts = kstrdup(page, GFP_KERNEL); 1651 if (!opts) 1652 return -ENOMEM; 1653 1654 orig = opts; 1655 while ((ptr = strsep(&opts, ",\n")) != NULL) { 1656 if (!*ptr) 1657 continue; 1658 1659 token = match_token(ptr, tokens, args); 1660 switch (token) { 1661 case Opt_initiator_fabric: 1662 i_fabric = match_strdup(args); 1663 if (!i_fabric) { 1664 ret = -ENOMEM; 1665 goto out; 1666 } 1667 break; 1668 case Opt_initiator_node: 1669 i_port = match_strdup(args); 1670 if (!i_port) { 1671 ret = -ENOMEM; 1672 goto out; 1673 } 1674 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 1675 pr_err("APTPL metadata initiator_node=" 1676 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 1677 PR_APTPL_MAX_IPORT_LEN); 1678 ret = -EINVAL; 1679 break; 1680 } 1681 break; 1682 case Opt_initiator_sid: 1683 isid = match_strdup(args); 1684 if (!isid) { 1685 ret = -ENOMEM; 1686 goto out; 1687 } 1688 if (strlen(isid) >= PR_REG_ISID_LEN) { 1689 pr_err("APTPL metadata initiator_isid" 1690 "= exceeds PR_REG_ISID_LEN: %d\n", 1691 PR_REG_ISID_LEN); 1692 ret = -EINVAL; 1693 break; 1694 } 1695 break; 1696 case Opt_sa_res_key: 1697 ret = match_u64(args, &tmp_ll); 1698 if (ret < 0) { 1699 pr_err("kstrtoull() failed for sa_res_key=\n"); 1700 goto out; 1701 } 1702 sa_res_key = (u64)tmp_ll; 1703 break; 1704 /* 1705 * PR APTPL Metadata for Reservation 1706 */ 1707 case Opt_res_holder: 1708 ret = match_int(args, &arg); 1709 if (ret) 1710 goto out; 1711 res_holder = arg; 1712 break; 1713 case Opt_res_type: 1714 ret = match_int(args, &arg); 1715 if (ret) 1716 goto out; 1717 type = (u8)arg; 1718 break; 1719 case Opt_res_scope: 1720 ret = match_int(args, &arg); 1721 if (ret) 1722 goto out; 1723 break; 1724 case Opt_res_all_tg_pt: 1725 ret = match_int(args, &arg); 1726 if (ret) 1727 goto out; 1728 all_tg_pt = (int)arg; 1729 break; 1730 case Opt_mapped_lun: 1731 ret = match_u64(args, &tmp_ll); 1732 if (ret) 1733 goto out; 1734 mapped_lun = (u64)tmp_ll; 1735 break; 1736 /* 1737 * PR APTPL Metadata for Target Port 1738 */ 1739 case Opt_target_fabric: 1740 t_fabric = match_strdup(args); 1741 if (!t_fabric) { 1742 ret = -ENOMEM; 1743 goto out; 1744 } 1745 break; 1746 case Opt_target_node: 1747 t_port = match_strdup(args); 1748 if (!t_port) { 1749 ret = -ENOMEM; 1750 goto out; 1751 } 1752 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 1753 pr_err("APTPL metadata target_node=" 1754 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 1755 PR_APTPL_MAX_TPORT_LEN); 1756 ret = -EINVAL; 1757 break; 1758 } 1759 break; 1760 case Opt_tpgt: 1761 ret = match_int(args, &arg); 1762 if (ret) 1763 goto out; 1764 tpgt = (u16)arg; 1765 break; 1766 case Opt_port_rtpi: 1767 ret = match_int(args, &arg); 1768 if (ret) 1769 goto out; 1770 break; 1771 case Opt_target_lun: 1772 ret = match_u64(args, &tmp_ll); 1773 if (ret) 1774 goto out; 1775 target_lun = (u64)tmp_ll; 1776 break; 1777 default: 1778 break; 1779 } 1780 } 1781 1782 if (!i_port || !t_port || !sa_res_key) { 1783 pr_err("Illegal parameters for APTPL registration\n"); 1784 ret = -EINVAL; 1785 goto out; 1786 } 1787 1788 if (res_holder && !(type)) { 1789 pr_err("Illegal PR type: 0x%02x for reservation" 1790 " holder\n", type); 1791 ret = -EINVAL; 1792 goto out; 1793 } 1794 1795 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, 1796 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 1797 res_holder, all_tg_pt, type); 1798 out: 1799 kfree(i_fabric); 1800 kfree(i_port); 1801 kfree(isid); 1802 kfree(t_fabric); 1803 kfree(t_port); 1804 kfree(orig); 1805 return (ret == 0) ? count : ret; 1806 } 1807 1808 1809 CONFIGFS_ATTR_RO(target_pr_, res_holder); 1810 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts); 1811 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation); 1812 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port); 1813 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts); 1814 CONFIGFS_ATTR_RO(target_pr_, res_pr_type); 1815 CONFIGFS_ATTR_RO(target_pr_, res_type); 1816 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active); 1817 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata); 1818 1819 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 1820 &target_pr_attr_res_holder, 1821 &target_pr_attr_res_pr_all_tgt_pts, 1822 &target_pr_attr_res_pr_generation, 1823 &target_pr_attr_res_pr_holder_tg_port, 1824 &target_pr_attr_res_pr_registered_i_pts, 1825 &target_pr_attr_res_pr_type, 1826 &target_pr_attr_res_type, 1827 &target_pr_attr_res_aptpl_active, 1828 &target_pr_attr_res_aptpl_metadata, 1829 NULL, 1830 }; 1831 1832 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs); 1833 1834 /* End functions for struct config_item_type tb_dev_pr_cit */ 1835 1836 /* Start functions for struct config_item_type tb_dev_cit */ 1837 1838 static inline struct se_device *to_device(struct config_item *item) 1839 { 1840 return container_of(to_config_group(item), struct se_device, dev_group); 1841 } 1842 1843 static ssize_t target_dev_info_show(struct config_item *item, char *page) 1844 { 1845 struct se_device *dev = to_device(item); 1846 int bl = 0; 1847 ssize_t read_bytes = 0; 1848 1849 transport_dump_dev_state(dev, page, &bl); 1850 read_bytes += bl; 1851 read_bytes += dev->transport->show_configfs_dev_params(dev, 1852 page+read_bytes); 1853 return read_bytes; 1854 } 1855 1856 static ssize_t target_dev_control_store(struct config_item *item, 1857 const char *page, size_t count) 1858 { 1859 struct se_device *dev = to_device(item); 1860 1861 return dev->transport->set_configfs_dev_params(dev, page, count); 1862 } 1863 1864 static ssize_t target_dev_alias_show(struct config_item *item, char *page) 1865 { 1866 struct se_device *dev = to_device(item); 1867 1868 if (!(dev->dev_flags & DF_USING_ALIAS)) 1869 return 0; 1870 1871 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); 1872 } 1873 1874 static ssize_t target_dev_alias_store(struct config_item *item, 1875 const char *page, size_t count) 1876 { 1877 struct se_device *dev = to_device(item); 1878 struct se_hba *hba = dev->se_hba; 1879 ssize_t read_bytes; 1880 1881 if (count > (SE_DEV_ALIAS_LEN-1)) { 1882 pr_err("alias count: %d exceeds" 1883 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 1884 SE_DEV_ALIAS_LEN-1); 1885 return -EINVAL; 1886 } 1887 1888 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); 1889 if (!read_bytes) 1890 return -EINVAL; 1891 if (dev->dev_alias[read_bytes - 1] == '\n') 1892 dev->dev_alias[read_bytes - 1] = '\0'; 1893 1894 dev->dev_flags |= DF_USING_ALIAS; 1895 1896 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 1897 config_item_name(&hba->hba_group.cg_item), 1898 config_item_name(&dev->dev_group.cg_item), 1899 dev->dev_alias); 1900 1901 return read_bytes; 1902 } 1903 1904 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page) 1905 { 1906 struct se_device *dev = to_device(item); 1907 1908 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) 1909 return 0; 1910 1911 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); 1912 } 1913 1914 static ssize_t target_dev_udev_path_store(struct config_item *item, 1915 const char *page, size_t count) 1916 { 1917 struct se_device *dev = to_device(item); 1918 struct se_hba *hba = dev->se_hba; 1919 ssize_t read_bytes; 1920 1921 if (count > (SE_UDEV_PATH_LEN-1)) { 1922 pr_err("udev_path count: %d exceeds" 1923 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 1924 SE_UDEV_PATH_LEN-1); 1925 return -EINVAL; 1926 } 1927 1928 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, 1929 "%s", page); 1930 if (!read_bytes) 1931 return -EINVAL; 1932 if (dev->udev_path[read_bytes - 1] == '\n') 1933 dev->udev_path[read_bytes - 1] = '\0'; 1934 1935 dev->dev_flags |= DF_USING_UDEV_PATH; 1936 1937 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 1938 config_item_name(&hba->hba_group.cg_item), 1939 config_item_name(&dev->dev_group.cg_item), 1940 dev->udev_path); 1941 1942 return read_bytes; 1943 } 1944 1945 static ssize_t target_dev_enable_show(struct config_item *item, char *page) 1946 { 1947 struct se_device *dev = to_device(item); 1948 1949 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED)); 1950 } 1951 1952 static ssize_t target_dev_enable_store(struct config_item *item, 1953 const char *page, size_t count) 1954 { 1955 struct se_device *dev = to_device(item); 1956 char *ptr; 1957 int ret; 1958 1959 ptr = strstr(page, "1"); 1960 if (!ptr) { 1961 pr_err("For dev_enable ops, only valid value" 1962 " is \"1\"\n"); 1963 return -EINVAL; 1964 } 1965 1966 ret = target_configure_device(dev); 1967 if (ret) 1968 return ret; 1969 return count; 1970 } 1971 1972 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page) 1973 { 1974 struct se_device *dev = to_device(item); 1975 struct config_item *lu_ci; 1976 struct t10_alua_lu_gp *lu_gp; 1977 struct t10_alua_lu_gp_member *lu_gp_mem; 1978 ssize_t len = 0; 1979 1980 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1981 if (!lu_gp_mem) 1982 return 0; 1983 1984 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1985 lu_gp = lu_gp_mem->lu_gp; 1986 if (lu_gp) { 1987 lu_ci = &lu_gp->lu_gp_group.cg_item; 1988 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 1989 config_item_name(lu_ci), lu_gp->lu_gp_id); 1990 } 1991 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1992 1993 return len; 1994 } 1995 1996 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item, 1997 const char *page, size_t count) 1998 { 1999 struct se_device *dev = to_device(item); 2000 struct se_hba *hba = dev->se_hba; 2001 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 2002 struct t10_alua_lu_gp_member *lu_gp_mem; 2003 unsigned char buf[LU_GROUP_NAME_BUF]; 2004 int move = 0; 2005 2006 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2007 if (!lu_gp_mem) 2008 return count; 2009 2010 if (count > LU_GROUP_NAME_BUF) { 2011 pr_err("ALUA LU Group Alias too large!\n"); 2012 return -EINVAL; 2013 } 2014 memset(buf, 0, LU_GROUP_NAME_BUF); 2015 memcpy(buf, page, count); 2016 /* 2017 * Any ALUA logical unit alias besides "NULL" means we will be 2018 * making a new group association. 2019 */ 2020 if (strcmp(strstrip(buf), "NULL")) { 2021 /* 2022 * core_alua_get_lu_gp_by_name() will increment reference to 2023 * struct t10_alua_lu_gp. This reference is released with 2024 * core_alua_get_lu_gp_by_name below(). 2025 */ 2026 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 2027 if (!lu_gp_new) 2028 return -ENODEV; 2029 } 2030 2031 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2032 lu_gp = lu_gp_mem->lu_gp; 2033 if (lu_gp) { 2034 /* 2035 * Clearing an existing lu_gp association, and replacing 2036 * with NULL 2037 */ 2038 if (!lu_gp_new) { 2039 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 2040 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 2041 " %hu\n", 2042 config_item_name(&hba->hba_group.cg_item), 2043 config_item_name(&dev->dev_group.cg_item), 2044 config_item_name(&lu_gp->lu_gp_group.cg_item), 2045 lu_gp->lu_gp_id); 2046 2047 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2048 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2049 2050 return count; 2051 } 2052 /* 2053 * Removing existing association of lu_gp_mem with lu_gp 2054 */ 2055 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2056 move = 1; 2057 } 2058 /* 2059 * Associate lu_gp_mem with lu_gp_new. 2060 */ 2061 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 2062 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2063 2064 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 2065 " core/alua/lu_gps/%s, ID: %hu\n", 2066 (move) ? "Moving" : "Adding", 2067 config_item_name(&hba->hba_group.cg_item), 2068 config_item_name(&dev->dev_group.cg_item), 2069 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 2070 lu_gp_new->lu_gp_id); 2071 2072 core_alua_put_lu_gp_from_name(lu_gp_new); 2073 return count; 2074 } 2075 2076 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page) 2077 { 2078 struct se_device *dev = to_device(item); 2079 struct t10_alua_lba_map *map; 2080 struct t10_alua_lba_map_member *mem; 2081 char *b = page; 2082 int bl = 0; 2083 char state; 2084 2085 spin_lock(&dev->t10_alua.lba_map_lock); 2086 if (!list_empty(&dev->t10_alua.lba_map_list)) 2087 bl += sprintf(b + bl, "%u %u\n", 2088 dev->t10_alua.lba_map_segment_size, 2089 dev->t10_alua.lba_map_segment_multiplier); 2090 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) { 2091 bl += sprintf(b + bl, "%llu %llu", 2092 map->lba_map_first_lba, map->lba_map_last_lba); 2093 list_for_each_entry(mem, &map->lba_map_mem_list, 2094 lba_map_mem_list) { 2095 switch (mem->lba_map_mem_alua_state) { 2096 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: 2097 state = 'O'; 2098 break; 2099 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: 2100 state = 'A'; 2101 break; 2102 case ALUA_ACCESS_STATE_STANDBY: 2103 state = 'S'; 2104 break; 2105 case ALUA_ACCESS_STATE_UNAVAILABLE: 2106 state = 'U'; 2107 break; 2108 default: 2109 state = '.'; 2110 break; 2111 } 2112 bl += sprintf(b + bl, " %d:%c", 2113 mem->lba_map_mem_alua_pg_id, state); 2114 } 2115 bl += sprintf(b + bl, "\n"); 2116 } 2117 spin_unlock(&dev->t10_alua.lba_map_lock); 2118 return bl; 2119 } 2120 2121 static ssize_t target_dev_lba_map_store(struct config_item *item, 2122 const char *page, size_t count) 2123 { 2124 struct se_device *dev = to_device(item); 2125 struct t10_alua_lba_map *lba_map = NULL; 2126 struct list_head lba_list; 2127 char *map_entries, *orig, *ptr; 2128 char state; 2129 int pg_num = -1, pg; 2130 int ret = 0, num = 0, pg_id, alua_state; 2131 unsigned long start_lba = -1, end_lba = -1; 2132 unsigned long segment_size = -1, segment_mult = -1; 2133 2134 orig = map_entries = kstrdup(page, GFP_KERNEL); 2135 if (!map_entries) 2136 return -ENOMEM; 2137 2138 INIT_LIST_HEAD(&lba_list); 2139 while ((ptr = strsep(&map_entries, "\n")) != NULL) { 2140 if (!*ptr) 2141 continue; 2142 2143 if (num == 0) { 2144 if (sscanf(ptr, "%lu %lu\n", 2145 &segment_size, &segment_mult) != 2) { 2146 pr_err("Invalid line %d\n", num); 2147 ret = -EINVAL; 2148 break; 2149 } 2150 num++; 2151 continue; 2152 } 2153 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) { 2154 pr_err("Invalid line %d\n", num); 2155 ret = -EINVAL; 2156 break; 2157 } 2158 ptr = strchr(ptr, ' '); 2159 if (!ptr) { 2160 pr_err("Invalid line %d, missing end lba\n", num); 2161 ret = -EINVAL; 2162 break; 2163 } 2164 ptr++; 2165 ptr = strchr(ptr, ' '); 2166 if (!ptr) { 2167 pr_err("Invalid line %d, missing state definitions\n", 2168 num); 2169 ret = -EINVAL; 2170 break; 2171 } 2172 ptr++; 2173 lba_map = core_alua_allocate_lba_map(&lba_list, 2174 start_lba, end_lba); 2175 if (IS_ERR(lba_map)) { 2176 ret = PTR_ERR(lba_map); 2177 break; 2178 } 2179 pg = 0; 2180 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) { 2181 switch (state) { 2182 case 'O': 2183 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED; 2184 break; 2185 case 'A': 2186 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED; 2187 break; 2188 case 'S': 2189 alua_state = ALUA_ACCESS_STATE_STANDBY; 2190 break; 2191 case 'U': 2192 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE; 2193 break; 2194 default: 2195 pr_err("Invalid ALUA state '%c'\n", state); 2196 ret = -EINVAL; 2197 goto out; 2198 } 2199 2200 ret = core_alua_allocate_lba_map_mem(lba_map, 2201 pg_id, alua_state); 2202 if (ret) { 2203 pr_err("Invalid target descriptor %d:%c " 2204 "at line %d\n", 2205 pg_id, state, num); 2206 break; 2207 } 2208 pg++; 2209 ptr = strchr(ptr, ' '); 2210 if (ptr) 2211 ptr++; 2212 else 2213 break; 2214 } 2215 if (pg_num == -1) 2216 pg_num = pg; 2217 else if (pg != pg_num) { 2218 pr_err("Only %d from %d port groups definitions " 2219 "at line %d\n", pg, pg_num, num); 2220 ret = -EINVAL; 2221 break; 2222 } 2223 num++; 2224 } 2225 out: 2226 if (ret) { 2227 core_alua_free_lba_map(&lba_list); 2228 count = ret; 2229 } else 2230 core_alua_set_lba_map(dev, &lba_list, 2231 segment_size, segment_mult); 2232 kfree(orig); 2233 return count; 2234 } 2235 2236 CONFIGFS_ATTR_RO(target_dev_, info); 2237 CONFIGFS_ATTR_WO(target_dev_, control); 2238 CONFIGFS_ATTR(target_dev_, alias); 2239 CONFIGFS_ATTR(target_dev_, udev_path); 2240 CONFIGFS_ATTR(target_dev_, enable); 2241 CONFIGFS_ATTR(target_dev_, alua_lu_gp); 2242 CONFIGFS_ATTR(target_dev_, lba_map); 2243 2244 static struct configfs_attribute *target_core_dev_attrs[] = { 2245 &target_dev_attr_info, 2246 &target_dev_attr_control, 2247 &target_dev_attr_alias, 2248 &target_dev_attr_udev_path, 2249 &target_dev_attr_enable, 2250 &target_dev_attr_alua_lu_gp, 2251 &target_dev_attr_lba_map, 2252 NULL, 2253 }; 2254 2255 static void target_core_dev_release(struct config_item *item) 2256 { 2257 struct config_group *dev_cg = to_config_group(item); 2258 struct se_device *dev = 2259 container_of(dev_cg, struct se_device, dev_group); 2260 2261 target_free_device(dev); 2262 } 2263 2264 /* 2265 * Used in target_core_fabric_configfs.c to verify valid se_device symlink 2266 * within target_fabric_port_link() 2267 */ 2268 struct configfs_item_operations target_core_dev_item_ops = { 2269 .release = target_core_dev_release, 2270 }; 2271 2272 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs); 2273 2274 /* End functions for struct config_item_type tb_dev_cit */ 2275 2276 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 2277 2278 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item) 2279 { 2280 return container_of(to_config_group(item), struct t10_alua_lu_gp, 2281 lu_gp_group); 2282 } 2283 2284 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page) 2285 { 2286 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2287 2288 if (!lu_gp->lu_gp_valid_id) 2289 return 0; 2290 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2291 } 2292 2293 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item, 2294 const char *page, size_t count) 2295 { 2296 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2297 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2298 unsigned long lu_gp_id; 2299 int ret; 2300 2301 ret = kstrtoul(page, 0, &lu_gp_id); 2302 if (ret < 0) { 2303 pr_err("kstrtoul() returned %d for" 2304 " lu_gp_id\n", ret); 2305 return ret; 2306 } 2307 if (lu_gp_id > 0x0000ffff) { 2308 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 2309 " 0x0000ffff\n", lu_gp_id); 2310 return -EINVAL; 2311 } 2312 2313 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2314 if (ret < 0) 2315 return -EINVAL; 2316 2317 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 2318 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2319 config_item_name(&alua_lu_gp_cg->cg_item), 2320 lu_gp->lu_gp_id); 2321 2322 return count; 2323 } 2324 2325 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page) 2326 { 2327 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2328 struct se_device *dev; 2329 struct se_hba *hba; 2330 struct t10_alua_lu_gp_member *lu_gp_mem; 2331 ssize_t len = 0, cur_len; 2332 unsigned char buf[LU_GROUP_NAME_BUF]; 2333 2334 memset(buf, 0, LU_GROUP_NAME_BUF); 2335 2336 spin_lock(&lu_gp->lu_gp_lock); 2337 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2338 dev = lu_gp_mem->lu_gp_mem_dev; 2339 hba = dev->se_hba; 2340 2341 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 2342 config_item_name(&hba->hba_group.cg_item), 2343 config_item_name(&dev->dev_group.cg_item)); 2344 cur_len++; /* Extra byte for NULL terminator */ 2345 2346 if ((cur_len + len) > PAGE_SIZE) { 2347 pr_warn("Ran out of lu_gp_show_attr" 2348 "_members buffer\n"); 2349 break; 2350 } 2351 memcpy(page+len, buf, cur_len); 2352 len += cur_len; 2353 } 2354 spin_unlock(&lu_gp->lu_gp_lock); 2355 2356 return len; 2357 } 2358 2359 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id); 2360 CONFIGFS_ATTR_RO(target_lu_gp_, members); 2361 2362 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2363 &target_lu_gp_attr_lu_gp_id, 2364 &target_lu_gp_attr_members, 2365 NULL, 2366 }; 2367 2368 static void target_core_alua_lu_gp_release(struct config_item *item) 2369 { 2370 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2371 struct t10_alua_lu_gp, lu_gp_group); 2372 2373 core_alua_free_lu_gp(lu_gp); 2374 } 2375 2376 static struct configfs_item_operations target_core_alua_lu_gp_ops = { 2377 .release = target_core_alua_lu_gp_release, 2378 }; 2379 2380 static const struct config_item_type target_core_alua_lu_gp_cit = { 2381 .ct_item_ops = &target_core_alua_lu_gp_ops, 2382 .ct_attrs = target_core_alua_lu_gp_attrs, 2383 .ct_owner = THIS_MODULE, 2384 }; 2385 2386 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2387 2388 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2389 2390 static struct config_group *target_core_alua_create_lu_gp( 2391 struct config_group *group, 2392 const char *name) 2393 { 2394 struct t10_alua_lu_gp *lu_gp; 2395 struct config_group *alua_lu_gp_cg = NULL; 2396 struct config_item *alua_lu_gp_ci = NULL; 2397 2398 lu_gp = core_alua_allocate_lu_gp(name, 0); 2399 if (IS_ERR(lu_gp)) 2400 return NULL; 2401 2402 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2403 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2404 2405 config_group_init_type_name(alua_lu_gp_cg, name, 2406 &target_core_alua_lu_gp_cit); 2407 2408 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2409 " Group: core/alua/lu_gps/%s\n", 2410 config_item_name(alua_lu_gp_ci)); 2411 2412 return alua_lu_gp_cg; 2413 2414 } 2415 2416 static void target_core_alua_drop_lu_gp( 2417 struct config_group *group, 2418 struct config_item *item) 2419 { 2420 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2421 struct t10_alua_lu_gp, lu_gp_group); 2422 2423 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2424 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2425 config_item_name(item), lu_gp->lu_gp_id); 2426 /* 2427 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 2428 * -> target_core_alua_lu_gp_release() 2429 */ 2430 config_item_put(item); 2431 } 2432 2433 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2434 .make_group = &target_core_alua_create_lu_gp, 2435 .drop_item = &target_core_alua_drop_lu_gp, 2436 }; 2437 2438 static const struct config_item_type target_core_alua_lu_gps_cit = { 2439 .ct_item_ops = NULL, 2440 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2441 .ct_owner = THIS_MODULE, 2442 }; 2443 2444 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2445 2446 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2447 2448 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item) 2449 { 2450 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp, 2451 tg_pt_gp_group); 2452 } 2453 2454 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item, 2455 char *page) 2456 { 2457 return sprintf(page, "%d\n", 2458 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state); 2459 } 2460 2461 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item, 2462 const char *page, size_t count) 2463 { 2464 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2465 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; 2466 unsigned long tmp; 2467 int new_state, ret; 2468 2469 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2470 pr_err("Unable to do implicit ALUA on non valid" 2471 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id); 2472 return -EINVAL; 2473 } 2474 if (!(dev->dev_flags & DF_CONFIGURED)) { 2475 pr_err("Unable to set alua_access_state while device is" 2476 " not configured\n"); 2477 return -ENODEV; 2478 } 2479 2480 ret = kstrtoul(page, 0, &tmp); 2481 if (ret < 0) { 2482 pr_err("Unable to extract new ALUA access state from" 2483 " %s\n", page); 2484 return ret; 2485 } 2486 new_state = (int)tmp; 2487 2488 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) { 2489 pr_err("Unable to process implicit configfs ALUA" 2490 " transition while TPGS_IMPLICIT_ALUA is disabled\n"); 2491 return -EINVAL; 2492 } 2493 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA && 2494 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) { 2495 /* LBA DEPENDENT is only allowed with implicit ALUA */ 2496 pr_err("Unable to process implicit configfs ALUA transition" 2497 " while explicit ALUA management is enabled\n"); 2498 return -EINVAL; 2499 } 2500 2501 ret = core_alua_do_port_transition(tg_pt_gp, dev, 2502 NULL, NULL, new_state, 0); 2503 return (!ret) ? count : -EINVAL; 2504 } 2505 2506 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item, 2507 char *page) 2508 { 2509 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2510 return sprintf(page, "%s\n", 2511 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2512 } 2513 2514 static ssize_t target_tg_pt_gp_alua_access_status_store( 2515 struct config_item *item, const char *page, size_t count) 2516 { 2517 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2518 unsigned long tmp; 2519 int new_status, ret; 2520 2521 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2522 pr_err("Unable to do set ALUA access status on non" 2523 " valid tg_pt_gp ID: %hu\n", 2524 tg_pt_gp->tg_pt_gp_valid_id); 2525 return -EINVAL; 2526 } 2527 2528 ret = kstrtoul(page, 0, &tmp); 2529 if (ret < 0) { 2530 pr_err("Unable to extract new ALUA access status" 2531 " from %s\n", page); 2532 return ret; 2533 } 2534 new_status = (int)tmp; 2535 2536 if ((new_status != ALUA_STATUS_NONE) && 2537 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && 2538 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { 2539 pr_err("Illegal ALUA access status: 0x%02x\n", 2540 new_status); 2541 return -EINVAL; 2542 } 2543 2544 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2545 return count; 2546 } 2547 2548 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item, 2549 char *page) 2550 { 2551 return core_alua_show_access_type(to_tg_pt_gp(item), page); 2552 } 2553 2554 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item, 2555 const char *page, size_t count) 2556 { 2557 return core_alua_store_access_type(to_tg_pt_gp(item), page, count); 2558 } 2559 2560 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \ 2561 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \ 2562 struct config_item *item, char *p) \ 2563 { \ 2564 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 2565 return sprintf(p, "%d\n", \ 2566 !!(t->tg_pt_gp_alua_supported_states & _bit)); \ 2567 } \ 2568 \ 2569 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \ 2570 struct config_item *item, const char *p, size_t c) \ 2571 { \ 2572 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 2573 unsigned long tmp; \ 2574 int ret; \ 2575 \ 2576 if (!t->tg_pt_gp_valid_id) { \ 2577 pr_err("Unable to do set " #_name " ALUA state on non" \ 2578 " valid tg_pt_gp ID: %hu\n", \ 2579 t->tg_pt_gp_valid_id); \ 2580 return -EINVAL; \ 2581 } \ 2582 \ 2583 ret = kstrtoul(p, 0, &tmp); \ 2584 if (ret < 0) { \ 2585 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \ 2586 return -EINVAL; \ 2587 } \ 2588 if (tmp > 1) { \ 2589 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \ 2590 return -EINVAL; \ 2591 } \ 2592 if (tmp) \ 2593 t->tg_pt_gp_alua_supported_states |= _bit; \ 2594 else \ 2595 t->tg_pt_gp_alua_supported_states &= ~_bit; \ 2596 \ 2597 return c; \ 2598 } 2599 2600 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP); 2601 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP); 2602 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP); 2603 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP); 2604 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP); 2605 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP); 2606 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP); 2607 2608 static ssize_t target_tg_pt_gp_alua_write_metadata_show( 2609 struct config_item *item, char *page) 2610 { 2611 return sprintf(page, "%d\n", 2612 to_tg_pt_gp(item)->tg_pt_gp_write_metadata); 2613 } 2614 2615 static ssize_t target_tg_pt_gp_alua_write_metadata_store( 2616 struct config_item *item, const char *page, size_t count) 2617 { 2618 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2619 unsigned long tmp; 2620 int ret; 2621 2622 ret = kstrtoul(page, 0, &tmp); 2623 if (ret < 0) { 2624 pr_err("Unable to extract alua_write_metadata\n"); 2625 return ret; 2626 } 2627 2628 if ((tmp != 0) && (tmp != 1)) { 2629 pr_err("Illegal value for alua_write_metadata:" 2630 " %lu\n", tmp); 2631 return -EINVAL; 2632 } 2633 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 2634 2635 return count; 2636 } 2637 2638 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item, 2639 char *page) 2640 { 2641 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page); 2642 } 2643 2644 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item, 2645 const char *page, size_t count) 2646 { 2647 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page, 2648 count); 2649 } 2650 2651 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item, 2652 char *page) 2653 { 2654 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page); 2655 } 2656 2657 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item, 2658 const char *page, size_t count) 2659 { 2660 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page, 2661 count); 2662 } 2663 2664 static ssize_t target_tg_pt_gp_implicit_trans_secs_show( 2665 struct config_item *item, char *page) 2666 { 2667 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page); 2668 } 2669 2670 static ssize_t target_tg_pt_gp_implicit_trans_secs_store( 2671 struct config_item *item, const char *page, size_t count) 2672 { 2673 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page, 2674 count); 2675 } 2676 2677 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item, 2678 char *page) 2679 { 2680 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page); 2681 } 2682 2683 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item, 2684 const char *page, size_t count) 2685 { 2686 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count); 2687 } 2688 2689 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item, 2690 char *page) 2691 { 2692 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2693 2694 if (!tg_pt_gp->tg_pt_gp_valid_id) 2695 return 0; 2696 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 2697 } 2698 2699 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item, 2700 const char *page, size_t count) 2701 { 2702 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2703 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2704 unsigned long tg_pt_gp_id; 2705 int ret; 2706 2707 ret = kstrtoul(page, 0, &tg_pt_gp_id); 2708 if (ret < 0) { 2709 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n", 2710 page); 2711 return ret; 2712 } 2713 if (tg_pt_gp_id > 0x0000ffff) { 2714 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n", 2715 tg_pt_gp_id); 2716 return -EINVAL; 2717 } 2718 2719 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 2720 if (ret < 0) 2721 return -EINVAL; 2722 2723 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 2724 "core/alua/tg_pt_gps/%s to ID: %hu\n", 2725 config_item_name(&alua_tg_pt_gp_cg->cg_item), 2726 tg_pt_gp->tg_pt_gp_id); 2727 2728 return count; 2729 } 2730 2731 static ssize_t target_tg_pt_gp_members_show(struct config_item *item, 2732 char *page) 2733 { 2734 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2735 struct se_lun *lun; 2736 ssize_t len = 0, cur_len; 2737 unsigned char buf[TG_PT_GROUP_NAME_BUF]; 2738 2739 memset(buf, 0, TG_PT_GROUP_NAME_BUF); 2740 2741 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 2742 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, 2743 lun_tg_pt_gp_link) { 2744 struct se_portal_group *tpg = lun->lun_tpg; 2745 2746 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 2747 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(), 2748 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 2749 tpg->se_tpg_tfo->tpg_get_tag(tpg), 2750 config_item_name(&lun->lun_group.cg_item)); 2751 cur_len++; /* Extra byte for NULL terminator */ 2752 2753 if ((cur_len + len) > PAGE_SIZE) { 2754 pr_warn("Ran out of lu_gp_show_attr" 2755 "_members buffer\n"); 2756 break; 2757 } 2758 memcpy(page+len, buf, cur_len); 2759 len += cur_len; 2760 } 2761 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 2762 2763 return len; 2764 } 2765 2766 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state); 2767 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status); 2768 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type); 2769 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning); 2770 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline); 2771 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent); 2772 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable); 2773 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby); 2774 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized); 2775 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized); 2776 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata); 2777 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs); 2778 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs); 2779 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs); 2780 CONFIGFS_ATTR(target_tg_pt_gp_, preferred); 2781 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id); 2782 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members); 2783 2784 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 2785 &target_tg_pt_gp_attr_alua_access_state, 2786 &target_tg_pt_gp_attr_alua_access_status, 2787 &target_tg_pt_gp_attr_alua_access_type, 2788 &target_tg_pt_gp_attr_alua_support_transitioning, 2789 &target_tg_pt_gp_attr_alua_support_offline, 2790 &target_tg_pt_gp_attr_alua_support_lba_dependent, 2791 &target_tg_pt_gp_attr_alua_support_unavailable, 2792 &target_tg_pt_gp_attr_alua_support_standby, 2793 &target_tg_pt_gp_attr_alua_support_active_nonoptimized, 2794 &target_tg_pt_gp_attr_alua_support_active_optimized, 2795 &target_tg_pt_gp_attr_alua_write_metadata, 2796 &target_tg_pt_gp_attr_nonop_delay_msecs, 2797 &target_tg_pt_gp_attr_trans_delay_msecs, 2798 &target_tg_pt_gp_attr_implicit_trans_secs, 2799 &target_tg_pt_gp_attr_preferred, 2800 &target_tg_pt_gp_attr_tg_pt_gp_id, 2801 &target_tg_pt_gp_attr_members, 2802 NULL, 2803 }; 2804 2805 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 2806 { 2807 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2808 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2809 2810 core_alua_free_tg_pt_gp(tg_pt_gp); 2811 } 2812 2813 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 2814 .release = target_core_alua_tg_pt_gp_release, 2815 }; 2816 2817 static const struct config_item_type target_core_alua_tg_pt_gp_cit = { 2818 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 2819 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 2820 .ct_owner = THIS_MODULE, 2821 }; 2822 2823 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2824 2825 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 2826 2827 static struct config_group *target_core_alua_create_tg_pt_gp( 2828 struct config_group *group, 2829 const char *name) 2830 { 2831 struct t10_alua *alua = container_of(group, struct t10_alua, 2832 alua_tg_pt_gps_group); 2833 struct t10_alua_tg_pt_gp *tg_pt_gp; 2834 struct config_group *alua_tg_pt_gp_cg = NULL; 2835 struct config_item *alua_tg_pt_gp_ci = NULL; 2836 2837 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0); 2838 if (!tg_pt_gp) 2839 return NULL; 2840 2841 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2842 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 2843 2844 config_group_init_type_name(alua_tg_pt_gp_cg, name, 2845 &target_core_alua_tg_pt_gp_cit); 2846 2847 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 2848 " Group: alua/tg_pt_gps/%s\n", 2849 config_item_name(alua_tg_pt_gp_ci)); 2850 2851 return alua_tg_pt_gp_cg; 2852 } 2853 2854 static void target_core_alua_drop_tg_pt_gp( 2855 struct config_group *group, 2856 struct config_item *item) 2857 { 2858 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2859 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2860 2861 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 2862 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 2863 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 2864 /* 2865 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 2866 * -> target_core_alua_tg_pt_gp_release(). 2867 */ 2868 config_item_put(item); 2869 } 2870 2871 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 2872 .make_group = &target_core_alua_create_tg_pt_gp, 2873 .drop_item = &target_core_alua_drop_tg_pt_gp, 2874 }; 2875 2876 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL); 2877 2878 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 2879 2880 /* Start functions for struct config_item_type target_core_alua_cit */ 2881 2882 /* 2883 * target_core_alua_cit is a ConfigFS group that lives under 2884 * /sys/kernel/config/target/core/alua. There are default groups 2885 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 2886 * target_core_alua_cit in target_core_init_configfs() below. 2887 */ 2888 static const struct config_item_type target_core_alua_cit = { 2889 .ct_item_ops = NULL, 2890 .ct_attrs = NULL, 2891 .ct_owner = THIS_MODULE, 2892 }; 2893 2894 /* End functions for struct config_item_type target_core_alua_cit */ 2895 2896 /* Start functions for struct config_item_type tb_dev_stat_cit */ 2897 2898 static struct config_group *target_core_stat_mkdir( 2899 struct config_group *group, 2900 const char *name) 2901 { 2902 return ERR_PTR(-ENOSYS); 2903 } 2904 2905 static void target_core_stat_rmdir( 2906 struct config_group *group, 2907 struct config_item *item) 2908 { 2909 return; 2910 } 2911 2912 static struct configfs_group_operations target_core_stat_group_ops = { 2913 .make_group = &target_core_stat_mkdir, 2914 .drop_item = &target_core_stat_rmdir, 2915 }; 2916 2917 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL); 2918 2919 /* End functions for struct config_item_type tb_dev_stat_cit */ 2920 2921 /* Start functions for struct config_item_type target_core_hba_cit */ 2922 2923 static struct config_group *target_core_make_subdev( 2924 struct config_group *group, 2925 const char *name) 2926 { 2927 struct t10_alua_tg_pt_gp *tg_pt_gp; 2928 struct config_item *hba_ci = &group->cg_item; 2929 struct se_hba *hba = item_to_hba(hba_ci); 2930 struct target_backend *tb = hba->backend; 2931 struct se_device *dev; 2932 int errno = -ENOMEM, ret; 2933 2934 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 2935 if (ret) 2936 return ERR_PTR(ret); 2937 2938 dev = target_alloc_device(hba, name); 2939 if (!dev) 2940 goto out_unlock; 2941 2942 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit); 2943 2944 config_group_init_type_name(&dev->dev_action_group, "action", 2945 &tb->tb_dev_action_cit); 2946 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group); 2947 2948 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib", 2949 &tb->tb_dev_attrib_cit); 2950 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group); 2951 2952 config_group_init_type_name(&dev->dev_pr_group, "pr", 2953 &tb->tb_dev_pr_cit); 2954 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group); 2955 2956 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn", 2957 &tb->tb_dev_wwn_cit); 2958 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group, 2959 &dev->dev_group); 2960 2961 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group, 2962 "alua", &tb->tb_dev_alua_tg_pt_gps_cit); 2963 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group, 2964 &dev->dev_group); 2965 2966 config_group_init_type_name(&dev->dev_stat_grps.stat_group, 2967 "statistics", &tb->tb_dev_stat_cit); 2968 configfs_add_default_group(&dev->dev_stat_grps.stat_group, 2969 &dev->dev_group); 2970 2971 /* 2972 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 2973 */ 2974 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1); 2975 if (!tg_pt_gp) 2976 goto out_free_device; 2977 dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 2978 2979 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 2980 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 2981 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group, 2982 &dev->t10_alua.alua_tg_pt_gps_group); 2983 2984 /* 2985 * Add core/$HBA/$DEV/statistics/ default groups 2986 */ 2987 target_stat_setup_dev_default_groups(dev); 2988 2989 mutex_unlock(&hba->hba_access_mutex); 2990 return &dev->dev_group; 2991 2992 out_free_device: 2993 target_free_device(dev); 2994 out_unlock: 2995 mutex_unlock(&hba->hba_access_mutex); 2996 return ERR_PTR(errno); 2997 } 2998 2999 static void target_core_drop_subdev( 3000 struct config_group *group, 3001 struct config_item *item) 3002 { 3003 struct config_group *dev_cg = to_config_group(item); 3004 struct se_device *dev = 3005 container_of(dev_cg, struct se_device, dev_group); 3006 struct se_hba *hba; 3007 3008 hba = item_to_hba(&dev->se_hba->hba_group.cg_item); 3009 3010 mutex_lock(&hba->hba_access_mutex); 3011 3012 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group); 3013 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group); 3014 3015 /* 3016 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 3017 * directly from target_core_alua_tg_pt_gp_release(). 3018 */ 3019 dev->t10_alua.default_tg_pt_gp = NULL; 3020 3021 configfs_remove_default_groups(dev_cg); 3022 3023 /* 3024 * se_dev is released from target_core_dev_item_ops->release() 3025 */ 3026 config_item_put(item); 3027 mutex_unlock(&hba->hba_access_mutex); 3028 } 3029 3030 static struct configfs_group_operations target_core_hba_group_ops = { 3031 .make_group = target_core_make_subdev, 3032 .drop_item = target_core_drop_subdev, 3033 }; 3034 3035 3036 static inline struct se_hba *to_hba(struct config_item *item) 3037 { 3038 return container_of(to_config_group(item), struct se_hba, hba_group); 3039 } 3040 3041 static ssize_t target_hba_info_show(struct config_item *item, char *page) 3042 { 3043 struct se_hba *hba = to_hba(item); 3044 3045 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 3046 hba->hba_id, hba->backend->ops->name, 3047 TARGET_CORE_VERSION); 3048 } 3049 3050 static ssize_t target_hba_mode_show(struct config_item *item, char *page) 3051 { 3052 struct se_hba *hba = to_hba(item); 3053 int hba_mode = 0; 3054 3055 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 3056 hba_mode = 1; 3057 3058 return sprintf(page, "%d\n", hba_mode); 3059 } 3060 3061 static ssize_t target_hba_mode_store(struct config_item *item, 3062 const char *page, size_t count) 3063 { 3064 struct se_hba *hba = to_hba(item); 3065 unsigned long mode_flag; 3066 int ret; 3067 3068 if (hba->backend->ops->pmode_enable_hba == NULL) 3069 return -EINVAL; 3070 3071 ret = kstrtoul(page, 0, &mode_flag); 3072 if (ret < 0) { 3073 pr_err("Unable to extract hba mode flag: %d\n", ret); 3074 return ret; 3075 } 3076 3077 if (hba->dev_count) { 3078 pr_err("Unable to set hba_mode with active devices\n"); 3079 return -EINVAL; 3080 } 3081 3082 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag); 3083 if (ret < 0) 3084 return -EINVAL; 3085 if (ret > 0) 3086 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 3087 else if (ret == 0) 3088 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 3089 3090 return count; 3091 } 3092 3093 CONFIGFS_ATTR_RO(target_, hba_info); 3094 CONFIGFS_ATTR(target_, hba_mode); 3095 3096 static void target_core_hba_release(struct config_item *item) 3097 { 3098 struct se_hba *hba = container_of(to_config_group(item), 3099 struct se_hba, hba_group); 3100 core_delete_hba(hba); 3101 } 3102 3103 static struct configfs_attribute *target_core_hba_attrs[] = { 3104 &target_attr_hba_info, 3105 &target_attr_hba_mode, 3106 NULL, 3107 }; 3108 3109 static struct configfs_item_operations target_core_hba_item_ops = { 3110 .release = target_core_hba_release, 3111 }; 3112 3113 static const struct config_item_type target_core_hba_cit = { 3114 .ct_item_ops = &target_core_hba_item_ops, 3115 .ct_group_ops = &target_core_hba_group_ops, 3116 .ct_attrs = target_core_hba_attrs, 3117 .ct_owner = THIS_MODULE, 3118 }; 3119 3120 static struct config_group *target_core_call_addhbatotarget( 3121 struct config_group *group, 3122 const char *name) 3123 { 3124 char *se_plugin_str, *str, *str2; 3125 struct se_hba *hba; 3126 char buf[TARGET_CORE_NAME_MAX_LEN]; 3127 unsigned long plugin_dep_id = 0; 3128 int ret; 3129 3130 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN); 3131 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 3132 pr_err("Passed *name strlen(): %d exceeds" 3133 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 3134 TARGET_CORE_NAME_MAX_LEN); 3135 return ERR_PTR(-ENAMETOOLONG); 3136 } 3137 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 3138 3139 str = strstr(buf, "_"); 3140 if (!str) { 3141 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 3142 return ERR_PTR(-EINVAL); 3143 } 3144 se_plugin_str = buf; 3145 /* 3146 * Special case for subsystem plugins that have "_" in their names. 3147 * Namely rd_direct and rd_mcp.. 3148 */ 3149 str2 = strstr(str+1, "_"); 3150 if (str2) { 3151 *str2 = '\0'; /* Terminate for *se_plugin_str */ 3152 str2++; /* Skip to start of plugin dependent ID */ 3153 str = str2; 3154 } else { 3155 *str = '\0'; /* Terminate for *se_plugin_str */ 3156 str++; /* Skip to start of plugin dependent ID */ 3157 } 3158 3159 ret = kstrtoul(str, 0, &plugin_dep_id); 3160 if (ret < 0) { 3161 pr_err("kstrtoul() returned %d for" 3162 " plugin_dep_id\n", ret); 3163 return ERR_PTR(ret); 3164 } 3165 /* 3166 * Load up TCM subsystem plugins if they have not already been loaded. 3167 */ 3168 transport_subsystem_check_init(); 3169 3170 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 3171 if (IS_ERR(hba)) 3172 return ERR_CAST(hba); 3173 3174 config_group_init_type_name(&hba->hba_group, name, 3175 &target_core_hba_cit); 3176 3177 return &hba->hba_group; 3178 } 3179 3180 static void target_core_call_delhbafromtarget( 3181 struct config_group *group, 3182 struct config_item *item) 3183 { 3184 /* 3185 * core_delete_hba() is called from target_core_hba_item_ops->release() 3186 * -> target_core_hba_release() 3187 */ 3188 config_item_put(item); 3189 } 3190 3191 static struct configfs_group_operations target_core_group_ops = { 3192 .make_group = target_core_call_addhbatotarget, 3193 .drop_item = target_core_call_delhbafromtarget, 3194 }; 3195 3196 static const struct config_item_type target_core_cit = { 3197 .ct_item_ops = NULL, 3198 .ct_group_ops = &target_core_group_ops, 3199 .ct_attrs = NULL, 3200 .ct_owner = THIS_MODULE, 3201 }; 3202 3203 /* Stop functions for struct config_item_type target_core_hba_cit */ 3204 3205 void target_setup_backend_cits(struct target_backend *tb) 3206 { 3207 target_core_setup_dev_cit(tb); 3208 target_core_setup_dev_action_cit(tb); 3209 target_core_setup_dev_attrib_cit(tb); 3210 target_core_setup_dev_pr_cit(tb); 3211 target_core_setup_dev_wwn_cit(tb); 3212 target_core_setup_dev_alua_tg_pt_gps_cit(tb); 3213 target_core_setup_dev_stat_cit(tb); 3214 } 3215 3216 static int __init target_core_init_configfs(void) 3217 { 3218 struct configfs_subsystem *subsys = &target_core_fabrics; 3219 struct t10_alua_lu_gp *lu_gp; 3220 int ret; 3221 3222 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 3223 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3224 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3225 3226 config_group_init(&subsys->su_group); 3227 mutex_init(&subsys->su_mutex); 3228 3229 ret = init_se_kmem_caches(); 3230 if (ret < 0) 3231 return ret; 3232 /* 3233 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3234 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3235 */ 3236 config_group_init_type_name(&target_core_hbagroup, "core", 3237 &target_core_cit); 3238 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group); 3239 3240 /* 3241 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3242 */ 3243 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit); 3244 configfs_add_default_group(&alua_group, &target_core_hbagroup); 3245 3246 /* 3247 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3248 * groups under /sys/kernel/config/target/core/alua/ 3249 */ 3250 config_group_init_type_name(&alua_lu_gps_group, "lu_gps", 3251 &target_core_alua_lu_gps_cit); 3252 configfs_add_default_group(&alua_lu_gps_group, &alua_group); 3253 3254 /* 3255 * Add core/alua/lu_gps/default_lu_gp 3256 */ 3257 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3258 if (IS_ERR(lu_gp)) { 3259 ret = -ENOMEM; 3260 goto out_global; 3261 } 3262 3263 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3264 &target_core_alua_lu_gp_cit); 3265 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group); 3266 3267 default_lu_gp = lu_gp; 3268 3269 /* 3270 * Register the target_core_mod subsystem with configfs. 3271 */ 3272 ret = configfs_register_subsystem(subsys); 3273 if (ret < 0) { 3274 pr_err("Error %d while registering subsystem %s\n", 3275 ret, subsys->su_group.cg_item.ci_namebuf); 3276 goto out_global; 3277 } 3278 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 3279 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s" 3280 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3281 /* 3282 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3283 */ 3284 ret = rd_module_init(); 3285 if (ret < 0) 3286 goto out; 3287 3288 ret = core_dev_setup_virtual_lun0(); 3289 if (ret < 0) 3290 goto out; 3291 3292 ret = target_xcopy_setup_pt(); 3293 if (ret < 0) 3294 goto out; 3295 3296 return 0; 3297 3298 out: 3299 configfs_unregister_subsystem(subsys); 3300 core_dev_release_virtual_lun0(); 3301 rd_module_exit(); 3302 out_global: 3303 if (default_lu_gp) { 3304 core_alua_free_lu_gp(default_lu_gp); 3305 default_lu_gp = NULL; 3306 } 3307 release_se_kmem_caches(); 3308 return ret; 3309 } 3310 3311 static void __exit target_core_exit_configfs(void) 3312 { 3313 configfs_remove_default_groups(&alua_lu_gps_group); 3314 configfs_remove_default_groups(&alua_group); 3315 configfs_remove_default_groups(&target_core_hbagroup); 3316 3317 /* 3318 * We expect subsys->su_group.default_groups to be released 3319 * by configfs subsystem provider logic.. 3320 */ 3321 configfs_unregister_subsystem(&target_core_fabrics); 3322 3323 core_alua_free_lu_gp(default_lu_gp); 3324 default_lu_gp = NULL; 3325 3326 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3327 " Infrastructure\n"); 3328 3329 core_dev_release_virtual_lun0(); 3330 rd_module_exit(); 3331 target_xcopy_release_pt(); 3332 release_se_kmem_caches(); 3333 } 3334 3335 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3336 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3337 MODULE_LICENSE("GPL"); 3338 3339 module_init(target_core_init_configfs); 3340 module_exit(target_core_exit_configfs); 3341