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