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