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 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); 159 160 return read_bytes; 161 } 162 163 CONFIGFS_ATTR(target_core_item_, dbroot); 164 165 static struct target_fabric_configfs *target_core_get_fabric( 166 const char *name) 167 { 168 struct target_fabric_configfs *tf; 169 170 if (!name) 171 return NULL; 172 173 mutex_lock(&g_tf_lock); 174 list_for_each_entry(tf, &g_tf_list, tf_list) { 175 const char *cmp_name = tf->tf_ops->fabric_alias; 176 if (!cmp_name) 177 cmp_name = tf->tf_ops->fabric_name; 178 if (!strcmp(cmp_name, name)) { 179 atomic_inc(&tf->tf_access_cnt); 180 mutex_unlock(&g_tf_lock); 181 return tf; 182 } 183 } 184 mutex_unlock(&g_tf_lock); 185 186 return NULL; 187 } 188 189 /* 190 * Called from struct target_core_group_ops->make_group() 191 */ 192 static struct config_group *target_core_register_fabric( 193 struct config_group *group, 194 const char *name) 195 { 196 struct target_fabric_configfs *tf; 197 int ret; 198 199 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:" 200 " %s\n", group, name); 201 202 tf = target_core_get_fabric(name); 203 if (!tf) { 204 pr_debug("target_core_register_fabric() trying autoload for %s\n", 205 name); 206 207 /* 208 * Below are some hardcoded request_module() calls to automatically 209 * local fabric modules when the following is called: 210 * 211 * mkdir -p /sys/kernel/config/target/$MODULE_NAME 212 * 213 * Note that this does not limit which TCM fabric module can be 214 * registered, but simply provids auto loading logic for modules with 215 * mkdir(2) system calls with known TCM fabric modules. 216 */ 217 218 if (!strncmp(name, "iscsi", 5)) { 219 /* 220 * Automatically load the LIO Target fabric module when the 221 * following is called: 222 * 223 * mkdir -p $CONFIGFS/target/iscsi 224 */ 225 ret = request_module("iscsi_target_mod"); 226 if (ret < 0) { 227 pr_debug("request_module() failed for" 228 " iscsi_target_mod.ko: %d\n", ret); 229 return ERR_PTR(-EINVAL); 230 } 231 } else if (!strncmp(name, "loopback", 8)) { 232 /* 233 * Automatically load the tcm_loop fabric module when the 234 * following is called: 235 * 236 * mkdir -p $CONFIGFS/target/loopback 237 */ 238 ret = request_module("tcm_loop"); 239 if (ret < 0) { 240 pr_debug("request_module() failed for" 241 " tcm_loop.ko: %d\n", ret); 242 return ERR_PTR(-EINVAL); 243 } 244 } 245 246 tf = target_core_get_fabric(name); 247 } 248 249 if (!tf) { 250 pr_debug("target_core_get_fabric() failed for %s\n", 251 name); 252 return ERR_PTR(-EINVAL); 253 } 254 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:" 255 " %s\n", tf->tf_ops->fabric_name); 256 /* 257 * On a successful target_core_get_fabric() look, the returned 258 * struct target_fabric_configfs *tf will contain a usage reference. 259 */ 260 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n", 261 &tf->tf_wwn_cit); 262 263 config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit); 264 265 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth", 266 &tf->tf_discovery_cit); 267 configfs_add_default_group(&tf->tf_disc_group, &tf->tf_group); 268 269 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric: %s\n", 270 config_item_name(&tf->tf_group.cg_item)); 271 return &tf->tf_group; 272 } 273 274 /* 275 * Called from struct target_core_group_ops->drop_item() 276 */ 277 static void target_core_deregister_fabric( 278 struct config_group *group, 279 struct config_item *item) 280 { 281 struct target_fabric_configfs *tf = container_of( 282 to_config_group(item), struct target_fabric_configfs, tf_group); 283 284 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in" 285 " tf list\n", config_item_name(item)); 286 287 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:" 288 " %s\n", tf->tf_ops->fabric_name); 289 atomic_dec(&tf->tf_access_cnt); 290 291 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci" 292 " %s\n", config_item_name(item)); 293 294 configfs_remove_default_groups(&tf->tf_group); 295 config_item_put(item); 296 } 297 298 static struct configfs_group_operations target_core_fabric_group_ops = { 299 .make_group = &target_core_register_fabric, 300 .drop_item = &target_core_deregister_fabric, 301 }; 302 303 /* 304 * All item attributes appearing in /sys/kernel/target/ appear here. 305 */ 306 static struct configfs_attribute *target_core_fabric_item_attrs[] = { 307 &target_core_item_attr_version, 308 &target_core_item_attr_dbroot, 309 NULL, 310 }; 311 312 /* 313 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/ 314 */ 315 static const struct config_item_type target_core_fabrics_item = { 316 .ct_group_ops = &target_core_fabric_group_ops, 317 .ct_attrs = target_core_fabric_item_attrs, 318 .ct_owner = THIS_MODULE, 319 }; 320 321 static struct configfs_subsystem target_core_fabrics = { 322 .su_group = { 323 .cg_item = { 324 .ci_namebuf = "target", 325 .ci_type = &target_core_fabrics_item, 326 }, 327 }, 328 }; 329 330 int target_depend_item(struct config_item *item) 331 { 332 return configfs_depend_item(&target_core_fabrics, item); 333 } 334 EXPORT_SYMBOL(target_depend_item); 335 336 void target_undepend_item(struct config_item *item) 337 { 338 return configfs_undepend_item(item); 339 } 340 EXPORT_SYMBOL(target_undepend_item); 341 342 /*############################################################################## 343 // Start functions called by external Target Fabrics Modules 344 //############################################################################*/ 345 346 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo) 347 { 348 if (tfo->fabric_alias) { 349 if (strlen(tfo->fabric_alias) >= TARGET_FABRIC_NAME_SIZE) { 350 pr_err("Passed alias: %s exceeds " 351 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_alias); 352 return -EINVAL; 353 } 354 } 355 if (!tfo->fabric_name) { 356 pr_err("Missing tfo->fabric_name\n"); 357 return -EINVAL; 358 } 359 if (strlen(tfo->fabric_name) >= TARGET_FABRIC_NAME_SIZE) { 360 pr_err("Passed name: %s exceeds " 361 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_name); 362 return -EINVAL; 363 } 364 if (!tfo->tpg_get_wwn) { 365 pr_err("Missing tfo->tpg_get_wwn()\n"); 366 return -EINVAL; 367 } 368 if (!tfo->tpg_get_tag) { 369 pr_err("Missing tfo->tpg_get_tag()\n"); 370 return -EINVAL; 371 } 372 if (!tfo->tpg_check_demo_mode) { 373 pr_err("Missing tfo->tpg_check_demo_mode()\n"); 374 return -EINVAL; 375 } 376 if (!tfo->tpg_check_demo_mode_cache) { 377 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n"); 378 return -EINVAL; 379 } 380 if (!tfo->tpg_check_demo_mode_write_protect) { 381 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n"); 382 return -EINVAL; 383 } 384 if (!tfo->tpg_check_prod_mode_write_protect) { 385 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n"); 386 return -EINVAL; 387 } 388 if (!tfo->tpg_get_inst_index) { 389 pr_err("Missing tfo->tpg_get_inst_index()\n"); 390 return -EINVAL; 391 } 392 if (!tfo->release_cmd) { 393 pr_err("Missing tfo->release_cmd()\n"); 394 return -EINVAL; 395 } 396 if (!tfo->sess_get_index) { 397 pr_err("Missing tfo->sess_get_index()\n"); 398 return -EINVAL; 399 } 400 if (!tfo->write_pending) { 401 pr_err("Missing tfo->write_pending()\n"); 402 return -EINVAL; 403 } 404 if (!tfo->write_pending_status) { 405 pr_err("Missing tfo->write_pending_status()\n"); 406 return -EINVAL; 407 } 408 if (!tfo->set_default_node_attributes) { 409 pr_err("Missing tfo->set_default_node_attributes()\n"); 410 return -EINVAL; 411 } 412 if (!tfo->get_cmd_state) { 413 pr_err("Missing tfo->get_cmd_state()\n"); 414 return -EINVAL; 415 } 416 if (!tfo->queue_data_in) { 417 pr_err("Missing tfo->queue_data_in()\n"); 418 return -EINVAL; 419 } 420 if (!tfo->queue_status) { 421 pr_err("Missing tfo->queue_status()\n"); 422 return -EINVAL; 423 } 424 if (!tfo->queue_tm_rsp) { 425 pr_err("Missing tfo->queue_tm_rsp()\n"); 426 return -EINVAL; 427 } 428 if (!tfo->aborted_task) { 429 pr_err("Missing tfo->aborted_task()\n"); 430 return -EINVAL; 431 } 432 if (!tfo->check_stop_free) { 433 pr_err("Missing tfo->check_stop_free()\n"); 434 return -EINVAL; 435 } 436 /* 437 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn() 438 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in 439 * target_core_fabric_configfs.c WWN+TPG group context code. 440 */ 441 if (!tfo->fabric_make_wwn) { 442 pr_err("Missing tfo->fabric_make_wwn()\n"); 443 return -EINVAL; 444 } 445 if (!tfo->fabric_drop_wwn) { 446 pr_err("Missing tfo->fabric_drop_wwn()\n"); 447 return -EINVAL; 448 } 449 if (!tfo->fabric_make_tpg) { 450 pr_err("Missing tfo->fabric_make_tpg()\n"); 451 return -EINVAL; 452 } 453 if (!tfo->fabric_drop_tpg) { 454 pr_err("Missing tfo->fabric_drop_tpg()\n"); 455 return -EINVAL; 456 } 457 458 return 0; 459 } 460 461 int target_register_template(const struct target_core_fabric_ops *fo) 462 { 463 struct target_fabric_configfs *tf; 464 int ret; 465 466 ret = target_fabric_tf_ops_check(fo); 467 if (ret) 468 return ret; 469 470 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL); 471 if (!tf) { 472 pr_err("%s: could not allocate memory!\n", __func__); 473 return -ENOMEM; 474 } 475 476 INIT_LIST_HEAD(&tf->tf_list); 477 atomic_set(&tf->tf_access_cnt, 0); 478 tf->tf_ops = fo; 479 target_fabric_setup_cits(tf); 480 481 mutex_lock(&g_tf_lock); 482 list_add_tail(&tf->tf_list, &g_tf_list); 483 mutex_unlock(&g_tf_lock); 484 485 return 0; 486 } 487 EXPORT_SYMBOL(target_register_template); 488 489 void target_unregister_template(const struct target_core_fabric_ops *fo) 490 { 491 struct target_fabric_configfs *t; 492 493 mutex_lock(&g_tf_lock); 494 list_for_each_entry(t, &g_tf_list, tf_list) { 495 if (!strcmp(t->tf_ops->fabric_name, fo->fabric_name)) { 496 BUG_ON(atomic_read(&t->tf_access_cnt)); 497 list_del(&t->tf_list); 498 mutex_unlock(&g_tf_lock); 499 /* 500 * Wait for any outstanding fabric se_deve_entry->rcu_head 501 * callbacks to complete post kfree_rcu(), before allowing 502 * fabric driver unload of TFO->module to proceed. 503 */ 504 rcu_barrier(); 505 kfree(t); 506 return; 507 } 508 } 509 mutex_unlock(&g_tf_lock); 510 } 511 EXPORT_SYMBOL(target_unregister_template); 512 513 /*############################################################################## 514 // Stop functions called by external Target Fabrics Modules 515 //############################################################################*/ 516 517 static inline struct se_dev_attrib *to_attrib(struct config_item *item) 518 { 519 return container_of(to_config_group(item), struct se_dev_attrib, 520 da_group); 521 } 522 523 /* Start functions for struct config_item_type tb_dev_attrib_cit */ 524 #define DEF_CONFIGFS_ATTRIB_SHOW(_name) \ 525 static ssize_t _name##_show(struct config_item *item, char *page) \ 526 { \ 527 return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \ 528 } 529 530 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias); 531 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo); 532 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write); 533 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read); 534 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache); 535 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl); 536 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas); 537 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu); 538 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws); 539 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw); 540 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc); 541 DEF_CONFIGFS_ATTRIB_SHOW(emulate_pr); 542 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type); 543 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type); 544 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify); 545 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids); 546 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot); 547 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord); 548 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl); 549 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size); 550 DEF_CONFIGFS_ATTRIB_SHOW(block_size); 551 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors); 552 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors); 553 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth); 554 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth); 555 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count); 556 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count); 557 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity); 558 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment); 559 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data); 560 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len); 561 562 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \ 563 static ssize_t _name##_store(struct config_item *item, const char *page,\ 564 size_t count) \ 565 { \ 566 struct se_dev_attrib *da = to_attrib(item); \ 567 u32 val; \ 568 int ret; \ 569 \ 570 ret = kstrtou32(page, 0, &val); \ 571 if (ret < 0) \ 572 return ret; \ 573 da->_name = val; \ 574 return count; \ 575 } 576 577 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count); 578 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count); 579 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity); 580 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment); 581 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len); 582 583 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \ 584 static ssize_t _name##_store(struct config_item *item, const char *page, \ 585 size_t count) \ 586 { \ 587 struct se_dev_attrib *da = to_attrib(item); \ 588 bool flag; \ 589 int ret; \ 590 \ 591 ret = strtobool(page, &flag); \ 592 if (ret < 0) \ 593 return ret; \ 594 da->_name = flag; \ 595 return count; \ 596 } 597 598 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write); 599 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw); 600 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc); 601 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr); 602 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids); 603 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot); 604 605 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \ 606 static ssize_t _name##_store(struct config_item *item, const char *page,\ 607 size_t count) \ 608 { \ 609 printk_once(KERN_WARNING \ 610 "ignoring deprecated %s attribute\n", \ 611 __stringify(_name)); \ 612 return count; \ 613 } 614 615 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo); 616 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read); 617 618 static void dev_set_t10_wwn_model_alias(struct se_device *dev) 619 { 620 const char *configname; 621 622 configname = config_item_name(&dev->dev_group.cg_item); 623 if (strlen(configname) >= INQUIRY_MODEL_LEN) { 624 pr_warn("dev[%p]: Backstore name '%s' is too long for " 625 "INQUIRY_MODEL, truncating to 15 characters\n", dev, 626 configname); 627 } 628 /* 629 * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1) 630 * here without potentially breaking existing setups, so continue to 631 * truncate one byte shorter than what can be carried in INQUIRY. 632 */ 633 strlcpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN); 634 } 635 636 static ssize_t emulate_model_alias_store(struct config_item *item, 637 const char *page, size_t count) 638 { 639 struct se_dev_attrib *da = to_attrib(item); 640 struct se_device *dev = da->da_dev; 641 bool flag; 642 int ret; 643 644 if (dev->export_count) { 645 pr_err("dev[%p]: Unable to change model alias" 646 " while export_count is %d\n", 647 dev, dev->export_count); 648 return -EINVAL; 649 } 650 651 ret = strtobool(page, &flag); 652 if (ret < 0) 653 return ret; 654 655 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); 656 if (flag) { 657 dev_set_t10_wwn_model_alias(dev); 658 } else { 659 strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod, 660 sizeof(dev->t10_wwn.model)); 661 } 662 da->emulate_model_alias = flag; 663 return count; 664 } 665 666 static ssize_t emulate_write_cache_store(struct config_item *item, 667 const char *page, size_t count) 668 { 669 struct se_dev_attrib *da = to_attrib(item); 670 bool flag; 671 int ret; 672 673 ret = strtobool(page, &flag); 674 if (ret < 0) 675 return ret; 676 677 if (flag && da->da_dev->transport->get_write_cache) { 678 pr_err("emulate_write_cache not supported for this device\n"); 679 return -EINVAL; 680 } 681 682 da->emulate_write_cache = flag; 683 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 684 da->da_dev, flag); 685 return count; 686 } 687 688 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item, 689 const char *page, size_t count) 690 { 691 struct se_dev_attrib *da = to_attrib(item); 692 u32 val; 693 int ret; 694 695 ret = kstrtou32(page, 0, &val); 696 if (ret < 0) 697 return ret; 698 699 if (val != 0 && val != 1 && val != 2) { 700 pr_err("Illegal value %d\n", val); 701 return -EINVAL; 702 } 703 704 if (da->da_dev->export_count) { 705 pr_err("dev[%p]: Unable to change SE Device" 706 " UA_INTRLCK_CTRL while export_count is %d\n", 707 da->da_dev, da->da_dev->export_count); 708 return -EINVAL; 709 } 710 da->emulate_ua_intlck_ctrl = val; 711 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 712 da->da_dev, val); 713 return count; 714 } 715 716 static ssize_t emulate_tas_store(struct config_item *item, 717 const char *page, size_t count) 718 { 719 struct se_dev_attrib *da = to_attrib(item); 720 bool flag; 721 int ret; 722 723 ret = strtobool(page, &flag); 724 if (ret < 0) 725 return ret; 726 727 if (da->da_dev->export_count) { 728 pr_err("dev[%p]: Unable to change SE Device TAS while" 729 " export_count is %d\n", 730 da->da_dev, da->da_dev->export_count); 731 return -EINVAL; 732 } 733 da->emulate_tas = flag; 734 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 735 da->da_dev, flag ? "Enabled" : "Disabled"); 736 737 return count; 738 } 739 740 static ssize_t emulate_tpu_store(struct config_item *item, 741 const char *page, size_t count) 742 { 743 struct se_dev_attrib *da = to_attrib(item); 744 bool flag; 745 int ret; 746 747 ret = strtobool(page, &flag); 748 if (ret < 0) 749 return ret; 750 751 /* 752 * We expect this value to be non-zero when generic Block Layer 753 * Discard supported is detected iblock_create_virtdevice(). 754 */ 755 if (flag && !da->max_unmap_block_desc_count) { 756 pr_err("Generic Block Discard not supported\n"); 757 return -ENOSYS; 758 } 759 760 da->emulate_tpu = flag; 761 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 762 da->da_dev, flag); 763 return count; 764 } 765 766 static ssize_t emulate_tpws_store(struct config_item *item, 767 const char *page, size_t count) 768 { 769 struct se_dev_attrib *da = to_attrib(item); 770 bool flag; 771 int ret; 772 773 ret = strtobool(page, &flag); 774 if (ret < 0) 775 return ret; 776 777 /* 778 * We expect this value to be non-zero when generic Block Layer 779 * Discard supported is detected iblock_create_virtdevice(). 780 */ 781 if (flag && !da->max_unmap_block_desc_count) { 782 pr_err("Generic Block Discard not supported\n"); 783 return -ENOSYS; 784 } 785 786 da->emulate_tpws = flag; 787 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 788 da->da_dev, flag); 789 return count; 790 } 791 792 static ssize_t pi_prot_type_store(struct config_item *item, 793 const char *page, size_t count) 794 { 795 struct se_dev_attrib *da = to_attrib(item); 796 int old_prot = da->pi_prot_type, ret; 797 struct se_device *dev = da->da_dev; 798 u32 flag; 799 800 ret = kstrtou32(page, 0, &flag); 801 if (ret < 0) 802 return ret; 803 804 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) { 805 pr_err("Illegal value %d for pi_prot_type\n", flag); 806 return -EINVAL; 807 } 808 if (flag == 2) { 809 pr_err("DIF TYPE2 protection currently not supported\n"); 810 return -ENOSYS; 811 } 812 if (da->hw_pi_prot_type) { 813 pr_warn("DIF protection enabled on underlying hardware," 814 " ignoring\n"); 815 return count; 816 } 817 if (!dev->transport->init_prot || !dev->transport->free_prot) { 818 /* 0 is only allowed value for non-supporting backends */ 819 if (flag == 0) 820 return count; 821 822 pr_err("DIF protection not supported by backend: %s\n", 823 dev->transport->name); 824 return -ENOSYS; 825 } 826 if (!target_dev_configured(dev)) { 827 pr_err("DIF protection requires device to be configured\n"); 828 return -ENODEV; 829 } 830 if (dev->export_count) { 831 pr_err("dev[%p]: Unable to change SE Device PROT type while" 832 " export_count is %d\n", dev, dev->export_count); 833 return -EINVAL; 834 } 835 836 da->pi_prot_type = flag; 837 838 if (flag && !old_prot) { 839 ret = dev->transport->init_prot(dev); 840 if (ret) { 841 da->pi_prot_type = old_prot; 842 da->pi_prot_verify = (bool) da->pi_prot_type; 843 return ret; 844 } 845 846 } else if (!flag && old_prot) { 847 dev->transport->free_prot(dev); 848 } 849 850 da->pi_prot_verify = (bool) da->pi_prot_type; 851 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag); 852 return count; 853 } 854 855 static ssize_t pi_prot_format_store(struct config_item *item, 856 const char *page, size_t count) 857 { 858 struct se_dev_attrib *da = to_attrib(item); 859 struct se_device *dev = da->da_dev; 860 bool flag; 861 int ret; 862 863 ret = strtobool(page, &flag); 864 if (ret < 0) 865 return ret; 866 867 if (!flag) 868 return count; 869 870 if (!dev->transport->format_prot) { 871 pr_err("DIF protection format not supported by backend %s\n", 872 dev->transport->name); 873 return -ENOSYS; 874 } 875 if (!target_dev_configured(dev)) { 876 pr_err("DIF protection format requires device to be configured\n"); 877 return -ENODEV; 878 } 879 if (dev->export_count) { 880 pr_err("dev[%p]: Unable to format SE Device PROT type while" 881 " export_count is %d\n", dev, dev->export_count); 882 return -EINVAL; 883 } 884 885 ret = dev->transport->format_prot(dev); 886 if (ret) 887 return ret; 888 889 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev); 890 return count; 891 } 892 893 static ssize_t pi_prot_verify_store(struct config_item *item, 894 const char *page, size_t count) 895 { 896 struct se_dev_attrib *da = to_attrib(item); 897 bool flag; 898 int ret; 899 900 ret = strtobool(page, &flag); 901 if (ret < 0) 902 return ret; 903 904 if (!flag) { 905 da->pi_prot_verify = flag; 906 return count; 907 } 908 if (da->hw_pi_prot_type) { 909 pr_warn("DIF protection enabled on underlying hardware," 910 " ignoring\n"); 911 return count; 912 } 913 if (!da->pi_prot_type) { 914 pr_warn("DIF protection not supported by backend, ignoring\n"); 915 return count; 916 } 917 da->pi_prot_verify = flag; 918 919 return count; 920 } 921 922 static ssize_t force_pr_aptpl_store(struct config_item *item, 923 const char *page, size_t count) 924 { 925 struct se_dev_attrib *da = to_attrib(item); 926 bool flag; 927 int ret; 928 929 ret = strtobool(page, &flag); 930 if (ret < 0) 931 return ret; 932 if (da->da_dev->export_count) { 933 pr_err("dev[%p]: Unable to set force_pr_aptpl while" 934 " export_count is %d\n", 935 da->da_dev, da->da_dev->export_count); 936 return -EINVAL; 937 } 938 939 da->force_pr_aptpl = flag; 940 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag); 941 return count; 942 } 943 944 static ssize_t emulate_rest_reord_store(struct config_item *item, 945 const char *page, size_t count) 946 { 947 struct se_dev_attrib *da = to_attrib(item); 948 bool flag; 949 int ret; 950 951 ret = strtobool(page, &flag); 952 if (ret < 0) 953 return ret; 954 955 if (flag != 0) { 956 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted" 957 " reordering not implemented\n", da->da_dev); 958 return -ENOSYS; 959 } 960 da->emulate_rest_reord = flag; 961 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", 962 da->da_dev, flag); 963 return count; 964 } 965 966 static ssize_t unmap_zeroes_data_store(struct config_item *item, 967 const char *page, size_t count) 968 { 969 struct se_dev_attrib *da = to_attrib(item); 970 bool flag; 971 int ret; 972 973 ret = strtobool(page, &flag); 974 if (ret < 0) 975 return ret; 976 977 if (da->da_dev->export_count) { 978 pr_err("dev[%p]: Unable to change SE Device" 979 " unmap_zeroes_data while export_count is %d\n", 980 da->da_dev, da->da_dev->export_count); 981 return -EINVAL; 982 } 983 /* 984 * We expect this value to be non-zero when generic Block Layer 985 * Discard supported is detected iblock_configure_device(). 986 */ 987 if (flag && !da->max_unmap_block_desc_count) { 988 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set" 989 " because max_unmap_block_desc_count is zero\n", 990 da->da_dev); 991 return -ENOSYS; 992 } 993 da->unmap_zeroes_data = flag; 994 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n", 995 da->da_dev, flag); 996 return count; 997 } 998 999 /* 1000 * Note, this can only be called on unexported SE Device Object. 1001 */ 1002 static ssize_t queue_depth_store(struct config_item *item, 1003 const char *page, size_t count) 1004 { 1005 struct se_dev_attrib *da = to_attrib(item); 1006 struct se_device *dev = da->da_dev; 1007 u32 val; 1008 int ret; 1009 1010 ret = kstrtou32(page, 0, &val); 1011 if (ret < 0) 1012 return ret; 1013 1014 if (dev->export_count) { 1015 pr_err("dev[%p]: Unable to change SE Device TCQ while" 1016 " export_count is %d\n", 1017 dev, dev->export_count); 1018 return -EINVAL; 1019 } 1020 if (!val) { 1021 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev); 1022 return -EINVAL; 1023 } 1024 1025 if (val > dev->dev_attrib.queue_depth) { 1026 if (val > dev->dev_attrib.hw_queue_depth) { 1027 pr_err("dev[%p]: Passed queue_depth:" 1028 " %u exceeds TCM/SE_Device MAX" 1029 " TCQ: %u\n", dev, val, 1030 dev->dev_attrib.hw_queue_depth); 1031 return -EINVAL; 1032 } 1033 } 1034 da->queue_depth = dev->queue_depth = val; 1035 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val); 1036 return count; 1037 } 1038 1039 static ssize_t optimal_sectors_store(struct config_item *item, 1040 const char *page, size_t count) 1041 { 1042 struct se_dev_attrib *da = to_attrib(item); 1043 u32 val; 1044 int ret; 1045 1046 ret = kstrtou32(page, 0, &val); 1047 if (ret < 0) 1048 return ret; 1049 1050 if (da->da_dev->export_count) { 1051 pr_err("dev[%p]: Unable to change SE Device" 1052 " optimal_sectors while export_count is %d\n", 1053 da->da_dev, da->da_dev->export_count); 1054 return -EINVAL; 1055 } 1056 if (val > da->hw_max_sectors) { 1057 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1058 " greater than hw_max_sectors: %u\n", 1059 da->da_dev, val, da->hw_max_sectors); 1060 return -EINVAL; 1061 } 1062 1063 da->optimal_sectors = val; 1064 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1065 da->da_dev, val); 1066 return count; 1067 } 1068 1069 static ssize_t block_size_store(struct config_item *item, 1070 const char *page, size_t count) 1071 { 1072 struct se_dev_attrib *da = to_attrib(item); 1073 u32 val; 1074 int ret; 1075 1076 ret = kstrtou32(page, 0, &val); 1077 if (ret < 0) 1078 return ret; 1079 1080 if (da->da_dev->export_count) { 1081 pr_err("dev[%p]: Unable to change SE Device block_size" 1082 " while export_count is %d\n", 1083 da->da_dev, da->da_dev->export_count); 1084 return -EINVAL; 1085 } 1086 1087 if (val != 512 && val != 1024 && val != 2048 && val != 4096) { 1088 pr_err("dev[%p]: Illegal value for block_device: %u" 1089 " for SE device, must be 512, 1024, 2048 or 4096\n", 1090 da->da_dev, val); 1091 return -EINVAL; 1092 } 1093 1094 da->block_size = val; 1095 if (da->max_bytes_per_io) 1096 da->hw_max_sectors = da->max_bytes_per_io / val; 1097 1098 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1099 da->da_dev, val); 1100 return count; 1101 } 1102 1103 static ssize_t alua_support_show(struct config_item *item, char *page) 1104 { 1105 struct se_dev_attrib *da = to_attrib(item); 1106 u8 flags = da->da_dev->transport->transport_flags; 1107 1108 return snprintf(page, PAGE_SIZE, "%d\n", 1109 flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1); 1110 } 1111 1112 static ssize_t pgr_support_show(struct config_item *item, char *page) 1113 { 1114 struct se_dev_attrib *da = to_attrib(item); 1115 u8 flags = da->da_dev->transport->transport_flags; 1116 1117 return snprintf(page, PAGE_SIZE, "%d\n", 1118 flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1); 1119 } 1120 1121 CONFIGFS_ATTR(, emulate_model_alias); 1122 CONFIGFS_ATTR(, emulate_dpo); 1123 CONFIGFS_ATTR(, emulate_fua_write); 1124 CONFIGFS_ATTR(, emulate_fua_read); 1125 CONFIGFS_ATTR(, emulate_write_cache); 1126 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl); 1127 CONFIGFS_ATTR(, emulate_tas); 1128 CONFIGFS_ATTR(, emulate_tpu); 1129 CONFIGFS_ATTR(, emulate_tpws); 1130 CONFIGFS_ATTR(, emulate_caw); 1131 CONFIGFS_ATTR(, emulate_3pc); 1132 CONFIGFS_ATTR(, emulate_pr); 1133 CONFIGFS_ATTR(, pi_prot_type); 1134 CONFIGFS_ATTR_RO(, hw_pi_prot_type); 1135 CONFIGFS_ATTR_WO(, pi_prot_format); 1136 CONFIGFS_ATTR(, pi_prot_verify); 1137 CONFIGFS_ATTR(, enforce_pr_isids); 1138 CONFIGFS_ATTR(, is_nonrot); 1139 CONFIGFS_ATTR(, emulate_rest_reord); 1140 CONFIGFS_ATTR(, force_pr_aptpl); 1141 CONFIGFS_ATTR_RO(, hw_block_size); 1142 CONFIGFS_ATTR(, block_size); 1143 CONFIGFS_ATTR_RO(, hw_max_sectors); 1144 CONFIGFS_ATTR(, optimal_sectors); 1145 CONFIGFS_ATTR_RO(, hw_queue_depth); 1146 CONFIGFS_ATTR(, queue_depth); 1147 CONFIGFS_ATTR(, max_unmap_lba_count); 1148 CONFIGFS_ATTR(, max_unmap_block_desc_count); 1149 CONFIGFS_ATTR(, unmap_granularity); 1150 CONFIGFS_ATTR(, unmap_granularity_alignment); 1151 CONFIGFS_ATTR(, unmap_zeroes_data); 1152 CONFIGFS_ATTR(, max_write_same_len); 1153 CONFIGFS_ATTR_RO(, alua_support); 1154 CONFIGFS_ATTR_RO(, pgr_support); 1155 1156 /* 1157 * dev_attrib attributes for devices using the target core SBC/SPC 1158 * interpreter. Any backend using spc_parse_cdb should be using 1159 * these. 1160 */ 1161 struct configfs_attribute *sbc_attrib_attrs[] = { 1162 &attr_emulate_model_alias, 1163 &attr_emulate_dpo, 1164 &attr_emulate_fua_write, 1165 &attr_emulate_fua_read, 1166 &attr_emulate_write_cache, 1167 &attr_emulate_ua_intlck_ctrl, 1168 &attr_emulate_tas, 1169 &attr_emulate_tpu, 1170 &attr_emulate_tpws, 1171 &attr_emulate_caw, 1172 &attr_emulate_3pc, 1173 &attr_emulate_pr, 1174 &attr_pi_prot_type, 1175 &attr_hw_pi_prot_type, 1176 &attr_pi_prot_format, 1177 &attr_pi_prot_verify, 1178 &attr_enforce_pr_isids, 1179 &attr_is_nonrot, 1180 &attr_emulate_rest_reord, 1181 &attr_force_pr_aptpl, 1182 &attr_hw_block_size, 1183 &attr_block_size, 1184 &attr_hw_max_sectors, 1185 &attr_optimal_sectors, 1186 &attr_hw_queue_depth, 1187 &attr_queue_depth, 1188 &attr_max_unmap_lba_count, 1189 &attr_max_unmap_block_desc_count, 1190 &attr_unmap_granularity, 1191 &attr_unmap_granularity_alignment, 1192 &attr_unmap_zeroes_data, 1193 &attr_max_write_same_len, 1194 &attr_alua_support, 1195 &attr_pgr_support, 1196 NULL, 1197 }; 1198 EXPORT_SYMBOL(sbc_attrib_attrs); 1199 1200 /* 1201 * Minimal dev_attrib attributes for devices passing through CDBs. 1202 * In this case we only provide a few read-only attributes for 1203 * backwards compatibility. 1204 */ 1205 struct configfs_attribute *passthrough_attrib_attrs[] = { 1206 &attr_hw_pi_prot_type, 1207 &attr_hw_block_size, 1208 &attr_hw_max_sectors, 1209 &attr_hw_queue_depth, 1210 &attr_alua_support, 1211 &attr_pgr_support, 1212 NULL, 1213 }; 1214 EXPORT_SYMBOL(passthrough_attrib_attrs); 1215 1216 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL); 1217 TB_CIT_SETUP_DRV(dev_action, NULL, NULL); 1218 1219 /* End functions for struct config_item_type tb_dev_attrib_cit */ 1220 1221 /* Start functions for struct config_item_type tb_dev_wwn_cit */ 1222 1223 static struct t10_wwn *to_t10_wwn(struct config_item *item) 1224 { 1225 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group); 1226 } 1227 1228 /* 1229 * STANDARD and VPD page 0x83 T10 Vendor Identification 1230 */ 1231 static ssize_t target_wwn_vendor_id_show(struct config_item *item, 1232 char *page) 1233 { 1234 return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]); 1235 } 1236 1237 static ssize_t target_wwn_vendor_id_store(struct config_item *item, 1238 const char *page, size_t count) 1239 { 1240 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1241 struct se_device *dev = t10_wwn->t10_dev; 1242 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1243 unsigned char buf[INQUIRY_VENDOR_LEN + 2]; 1244 char *stripped = NULL; 1245 size_t len; 1246 int i; 1247 1248 len = strlcpy(buf, page, sizeof(buf)); 1249 if (len < sizeof(buf)) { 1250 /* Strip any newline added from userspace. */ 1251 stripped = strstrip(buf); 1252 len = strlen(stripped); 1253 } 1254 if (len > INQUIRY_VENDOR_LEN) { 1255 pr_err("Emulated T10 Vendor Identification exceeds" 1256 " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN) 1257 "\n"); 1258 return -EOVERFLOW; 1259 } 1260 1261 /* 1262 * SPC 4.3.1: 1263 * ASCII data fields shall contain only ASCII printable characters (i.e., 1264 * code values 20h to 7Eh) and may be terminated with one or more ASCII 1265 * null (00h) characters. 1266 */ 1267 for (i = 0; i < len; i++) { 1268 if ((stripped[i] < 0x20) || (stripped[i] > 0x7E)) { 1269 pr_err("Emulated T10 Vendor Identification contains" 1270 " non-ASCII-printable characters\n"); 1271 return -EINVAL; 1272 } 1273 } 1274 1275 /* 1276 * Check to see if any active exports exist. If they do exist, fail 1277 * here as changing this information on the fly (underneath the 1278 * initiator side OS dependent multipath code) could cause negative 1279 * effects. 1280 */ 1281 if (dev->export_count) { 1282 pr_err("Unable to set T10 Vendor Identification while" 1283 " active %d exports exist\n", dev->export_count); 1284 return -EINVAL; 1285 } 1286 1287 BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1); 1288 strlcpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor)); 1289 1290 pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:" 1291 " %s\n", dev->t10_wwn.vendor); 1292 1293 return count; 1294 } 1295 1296 /* 1297 * VPD page 0x80 Unit serial 1298 */ 1299 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item, 1300 char *page) 1301 { 1302 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 1303 &to_t10_wwn(item)->unit_serial[0]); 1304 } 1305 1306 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item, 1307 const char *page, size_t count) 1308 { 1309 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1310 struct se_device *dev = t10_wwn->t10_dev; 1311 unsigned char buf[INQUIRY_VPD_SERIAL_LEN]; 1312 1313 /* 1314 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 1315 * from the struct scsi_device level firmware, do not allow 1316 * VPD Unit Serial to be emulated. 1317 * 1318 * Note this struct scsi_device could also be emulating VPD 1319 * information from its drivers/scsi LLD. But for now we assume 1320 * it is doing 'the right thing' wrt a world wide unique 1321 * VPD Unit Serial Number that OS dependent multipath can depend on. 1322 */ 1323 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) { 1324 pr_err("Underlying SCSI device firmware provided VPD" 1325 " Unit Serial, ignoring request\n"); 1326 return -EOPNOTSUPP; 1327 } 1328 1329 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 1330 pr_err("Emulated VPD Unit Serial exceeds" 1331 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 1332 return -EOVERFLOW; 1333 } 1334 /* 1335 * Check to see if any active $FABRIC_MOD exports exist. If they 1336 * do exist, fail here as changing this information on the fly 1337 * (underneath the initiator side OS dependent multipath code) 1338 * could cause negative effects. 1339 */ 1340 if (dev->export_count) { 1341 pr_err("Unable to set VPD Unit Serial while" 1342 " active %d $FABRIC_MOD exports exist\n", 1343 dev->export_count); 1344 return -EINVAL; 1345 } 1346 1347 /* 1348 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 1349 * 1350 * Also, strip any newline added from the userspace 1351 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 1352 */ 1353 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN); 1354 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 1355 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 1356 "%s", strstrip(buf)); 1357 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL; 1358 1359 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 1360 " %s\n", dev->t10_wwn.unit_serial); 1361 1362 return count; 1363 } 1364 1365 /* 1366 * VPD page 0x83 Protocol Identifier 1367 */ 1368 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item, 1369 char *page) 1370 { 1371 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1372 struct t10_vpd *vpd; 1373 unsigned char buf[VPD_TMP_BUF_SIZE]; 1374 ssize_t len = 0; 1375 1376 memset(buf, 0, VPD_TMP_BUF_SIZE); 1377 1378 spin_lock(&t10_wwn->t10_vpd_lock); 1379 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 1380 if (!vpd->protocol_identifier_set) 1381 continue; 1382 1383 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 1384 1385 if (len + strlen(buf) >= PAGE_SIZE) 1386 break; 1387 1388 len += sprintf(page+len, "%s", buf); 1389 } 1390 spin_unlock(&t10_wwn->t10_vpd_lock); 1391 1392 return len; 1393 } 1394 1395 /* 1396 * Generic wrapper for dumping VPD identifiers by association. 1397 */ 1398 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 1399 static ssize_t target_wwn_##_name##_show(struct config_item *item, \ 1400 char *page) \ 1401 { \ 1402 struct t10_wwn *t10_wwn = to_t10_wwn(item); \ 1403 struct t10_vpd *vpd; \ 1404 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 1405 ssize_t len = 0; \ 1406 \ 1407 spin_lock(&t10_wwn->t10_vpd_lock); \ 1408 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 1409 if (vpd->association != _assoc) \ 1410 continue; \ 1411 \ 1412 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1413 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 1414 if (len + strlen(buf) >= PAGE_SIZE) \ 1415 break; \ 1416 len += sprintf(page+len, "%s", buf); \ 1417 \ 1418 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1419 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 1420 if (len + strlen(buf) >= PAGE_SIZE) \ 1421 break; \ 1422 len += sprintf(page+len, "%s", buf); \ 1423 \ 1424 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1425 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 1426 if (len + strlen(buf) >= PAGE_SIZE) \ 1427 break; \ 1428 len += sprintf(page+len, "%s", buf); \ 1429 } \ 1430 spin_unlock(&t10_wwn->t10_vpd_lock); \ 1431 \ 1432 return len; \ 1433 } 1434 1435 /* VPD page 0x83 Association: Logical Unit */ 1436 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 1437 /* VPD page 0x83 Association: Target Port */ 1438 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 1439 /* VPD page 0x83 Association: SCSI Target Device */ 1440 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 1441 1442 CONFIGFS_ATTR(target_wwn_, vendor_id); 1443 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial); 1444 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier); 1445 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit); 1446 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port); 1447 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device); 1448 1449 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 1450 &target_wwn_attr_vendor_id, 1451 &target_wwn_attr_vpd_unit_serial, 1452 &target_wwn_attr_vpd_protocol_identifier, 1453 &target_wwn_attr_vpd_assoc_logical_unit, 1454 &target_wwn_attr_vpd_assoc_target_port, 1455 &target_wwn_attr_vpd_assoc_scsi_target_device, 1456 NULL, 1457 }; 1458 1459 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs); 1460 1461 /* End functions for struct config_item_type tb_dev_wwn_cit */ 1462 1463 /* Start functions for struct config_item_type tb_dev_pr_cit */ 1464 1465 static struct se_device *pr_to_dev(struct config_item *item) 1466 { 1467 return container_of(to_config_group(item), struct se_device, 1468 dev_pr_group); 1469 } 1470 1471 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev, 1472 char *page) 1473 { 1474 struct se_node_acl *se_nacl; 1475 struct t10_pr_registration *pr_reg; 1476 char i_buf[PR_REG_ISID_ID_LEN]; 1477 1478 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1479 1480 pr_reg = dev->dev_pr_res_holder; 1481 if (!pr_reg) 1482 return sprintf(page, "No SPC-3 Reservation holder\n"); 1483 1484 se_nacl = pr_reg->pr_reg_nacl; 1485 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1486 1487 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", 1488 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1489 se_nacl->initiatorname, i_buf); 1490 } 1491 1492 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, 1493 char *page) 1494 { 1495 struct se_node_acl *se_nacl; 1496 ssize_t len; 1497 1498 se_nacl = dev->dev_reserved_node_acl; 1499 if (se_nacl) { 1500 len = sprintf(page, 1501 "SPC-2 Reservation: %s Initiator: %s\n", 1502 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1503 se_nacl->initiatorname); 1504 } else { 1505 len = sprintf(page, "No SPC-2 Reservation holder\n"); 1506 } 1507 return len; 1508 } 1509 1510 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page) 1511 { 1512 struct se_device *dev = pr_to_dev(item); 1513 int ret; 1514 1515 if (!dev->dev_attrib.emulate_pr) 1516 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 1517 1518 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1519 return sprintf(page, "Passthrough\n"); 1520 1521 spin_lock(&dev->dev_reservation_lock); 1522 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1523 ret = target_core_dev_pr_show_spc2_res(dev, page); 1524 else 1525 ret = target_core_dev_pr_show_spc3_res(dev, page); 1526 spin_unlock(&dev->dev_reservation_lock); 1527 return ret; 1528 } 1529 1530 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item, 1531 char *page) 1532 { 1533 struct se_device *dev = pr_to_dev(item); 1534 ssize_t len = 0; 1535 1536 spin_lock(&dev->dev_reservation_lock); 1537 if (!dev->dev_pr_res_holder) { 1538 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1539 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { 1540 len = sprintf(page, "SPC-3 Reservation: All Target" 1541 " Ports registration\n"); 1542 } else { 1543 len = sprintf(page, "SPC-3 Reservation: Single" 1544 " Target Port registration\n"); 1545 } 1546 1547 spin_unlock(&dev->dev_reservation_lock); 1548 return len; 1549 } 1550 1551 static ssize_t target_pr_res_pr_generation_show(struct config_item *item, 1552 char *page) 1553 { 1554 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation); 1555 } 1556 1557 1558 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item, 1559 char *page) 1560 { 1561 struct se_device *dev = pr_to_dev(item); 1562 struct se_node_acl *se_nacl; 1563 struct se_portal_group *se_tpg; 1564 struct t10_pr_registration *pr_reg; 1565 const struct target_core_fabric_ops *tfo; 1566 ssize_t len = 0; 1567 1568 spin_lock(&dev->dev_reservation_lock); 1569 pr_reg = dev->dev_pr_res_holder; 1570 if (!pr_reg) { 1571 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1572 goto out_unlock; 1573 } 1574 1575 se_nacl = pr_reg->pr_reg_nacl; 1576 se_tpg = se_nacl->se_tpg; 1577 tfo = se_tpg->se_tpg_tfo; 1578 1579 len += sprintf(page+len, "SPC-3 Reservation: %s" 1580 " Target Node Endpoint: %s\n", tfo->fabric_name, 1581 tfo->tpg_get_wwn(se_tpg)); 1582 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1583 " Identifier Tag: %hu %s Portal Group Tag: %hu" 1584 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi, 1585 tfo->fabric_name, tfo->tpg_get_tag(se_tpg), 1586 tfo->fabric_name, pr_reg->pr_aptpl_target_lun); 1587 1588 out_unlock: 1589 spin_unlock(&dev->dev_reservation_lock); 1590 return len; 1591 } 1592 1593 1594 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item, 1595 char *page) 1596 { 1597 struct se_device *dev = pr_to_dev(item); 1598 const struct target_core_fabric_ops *tfo; 1599 struct t10_pr_registration *pr_reg; 1600 unsigned char buf[384]; 1601 char i_buf[PR_REG_ISID_ID_LEN]; 1602 ssize_t len = 0; 1603 int reg_count = 0; 1604 1605 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1606 1607 spin_lock(&dev->t10_pr.registration_lock); 1608 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1609 pr_reg_list) { 1610 1611 memset(buf, 0, 384); 1612 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1613 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1614 core_pr_dump_initiator_port(pr_reg, i_buf, 1615 PR_REG_ISID_ID_LEN); 1616 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1617 tfo->fabric_name, 1618 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, 1619 pr_reg->pr_res_generation); 1620 1621 if (len + strlen(buf) >= PAGE_SIZE) 1622 break; 1623 1624 len += sprintf(page+len, "%s", buf); 1625 reg_count++; 1626 } 1627 spin_unlock(&dev->t10_pr.registration_lock); 1628 1629 if (!reg_count) 1630 len += sprintf(page+len, "None\n"); 1631 1632 return len; 1633 } 1634 1635 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page) 1636 { 1637 struct se_device *dev = pr_to_dev(item); 1638 struct t10_pr_registration *pr_reg; 1639 ssize_t len = 0; 1640 1641 spin_lock(&dev->dev_reservation_lock); 1642 pr_reg = dev->dev_pr_res_holder; 1643 if (pr_reg) { 1644 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1645 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 1646 } else { 1647 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1648 } 1649 1650 spin_unlock(&dev->dev_reservation_lock); 1651 return len; 1652 } 1653 1654 static ssize_t target_pr_res_type_show(struct config_item *item, char *page) 1655 { 1656 struct se_device *dev = pr_to_dev(item); 1657 1658 if (!dev->dev_attrib.emulate_pr) 1659 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 1660 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1661 return sprintf(page, "SPC_PASSTHROUGH\n"); 1662 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1663 return sprintf(page, "SPC2_RESERVATIONS\n"); 1664 1665 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 1666 } 1667 1668 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item, 1669 char *page) 1670 { 1671 struct se_device *dev = pr_to_dev(item); 1672 1673 if (!dev->dev_attrib.emulate_pr || 1674 (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 1675 return 0; 1676 1677 return sprintf(page, "APTPL Bit Status: %s\n", 1678 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 1679 } 1680 1681 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item, 1682 char *page) 1683 { 1684 struct se_device *dev = pr_to_dev(item); 1685 1686 if (!dev->dev_attrib.emulate_pr || 1687 (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 1688 return 0; 1689 1690 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 1691 } 1692 1693 enum { 1694 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 1695 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 1696 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 1697 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 1698 }; 1699 1700 static match_table_t tokens = { 1701 {Opt_initiator_fabric, "initiator_fabric=%s"}, 1702 {Opt_initiator_node, "initiator_node=%s"}, 1703 {Opt_initiator_sid, "initiator_sid=%s"}, 1704 {Opt_sa_res_key, "sa_res_key=%s"}, 1705 {Opt_res_holder, "res_holder=%d"}, 1706 {Opt_res_type, "res_type=%d"}, 1707 {Opt_res_scope, "res_scope=%d"}, 1708 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 1709 {Opt_mapped_lun, "mapped_lun=%u"}, 1710 {Opt_target_fabric, "target_fabric=%s"}, 1711 {Opt_target_node, "target_node=%s"}, 1712 {Opt_tpgt, "tpgt=%d"}, 1713 {Opt_port_rtpi, "port_rtpi=%d"}, 1714 {Opt_target_lun, "target_lun=%u"}, 1715 {Opt_err, NULL} 1716 }; 1717 1718 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item, 1719 const char *page, size_t count) 1720 { 1721 struct se_device *dev = pr_to_dev(item); 1722 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 1723 unsigned char *t_fabric = NULL, *t_port = NULL; 1724 char *orig, *ptr, *opts; 1725 substring_t args[MAX_OPT_ARGS]; 1726 unsigned long long tmp_ll; 1727 u64 sa_res_key = 0; 1728 u64 mapped_lun = 0, target_lun = 0; 1729 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 1730 u16 tpgt = 0; 1731 u8 type = 0; 1732 1733 if (!dev->dev_attrib.emulate_pr || 1734 (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 1735 return count; 1736 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1737 return count; 1738 1739 if (dev->export_count) { 1740 pr_debug("Unable to process APTPL metadata while" 1741 " active fabric exports exist\n"); 1742 return -EINVAL; 1743 } 1744 1745 opts = kstrdup(page, GFP_KERNEL); 1746 if (!opts) 1747 return -ENOMEM; 1748 1749 orig = opts; 1750 while ((ptr = strsep(&opts, ",\n")) != NULL) { 1751 if (!*ptr) 1752 continue; 1753 1754 token = match_token(ptr, tokens, args); 1755 switch (token) { 1756 case Opt_initiator_fabric: 1757 i_fabric = match_strdup(args); 1758 if (!i_fabric) { 1759 ret = -ENOMEM; 1760 goto out; 1761 } 1762 break; 1763 case Opt_initiator_node: 1764 i_port = match_strdup(args); 1765 if (!i_port) { 1766 ret = -ENOMEM; 1767 goto out; 1768 } 1769 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 1770 pr_err("APTPL metadata initiator_node=" 1771 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 1772 PR_APTPL_MAX_IPORT_LEN); 1773 ret = -EINVAL; 1774 break; 1775 } 1776 break; 1777 case Opt_initiator_sid: 1778 isid = match_strdup(args); 1779 if (!isid) { 1780 ret = -ENOMEM; 1781 goto out; 1782 } 1783 if (strlen(isid) >= PR_REG_ISID_LEN) { 1784 pr_err("APTPL metadata initiator_isid" 1785 "= exceeds PR_REG_ISID_LEN: %d\n", 1786 PR_REG_ISID_LEN); 1787 ret = -EINVAL; 1788 break; 1789 } 1790 break; 1791 case Opt_sa_res_key: 1792 ret = match_u64(args, &tmp_ll); 1793 if (ret < 0) { 1794 pr_err("kstrtoull() failed for sa_res_key=\n"); 1795 goto out; 1796 } 1797 sa_res_key = (u64)tmp_ll; 1798 break; 1799 /* 1800 * PR APTPL Metadata for Reservation 1801 */ 1802 case Opt_res_holder: 1803 ret = match_int(args, &arg); 1804 if (ret) 1805 goto out; 1806 res_holder = arg; 1807 break; 1808 case Opt_res_type: 1809 ret = match_int(args, &arg); 1810 if (ret) 1811 goto out; 1812 type = (u8)arg; 1813 break; 1814 case Opt_res_scope: 1815 ret = match_int(args, &arg); 1816 if (ret) 1817 goto out; 1818 break; 1819 case Opt_res_all_tg_pt: 1820 ret = match_int(args, &arg); 1821 if (ret) 1822 goto out; 1823 all_tg_pt = (int)arg; 1824 break; 1825 case Opt_mapped_lun: 1826 ret = match_u64(args, &tmp_ll); 1827 if (ret) 1828 goto out; 1829 mapped_lun = (u64)tmp_ll; 1830 break; 1831 /* 1832 * PR APTPL Metadata for Target Port 1833 */ 1834 case Opt_target_fabric: 1835 t_fabric = match_strdup(args); 1836 if (!t_fabric) { 1837 ret = -ENOMEM; 1838 goto out; 1839 } 1840 break; 1841 case Opt_target_node: 1842 t_port = match_strdup(args); 1843 if (!t_port) { 1844 ret = -ENOMEM; 1845 goto out; 1846 } 1847 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 1848 pr_err("APTPL metadata target_node=" 1849 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 1850 PR_APTPL_MAX_TPORT_LEN); 1851 ret = -EINVAL; 1852 break; 1853 } 1854 break; 1855 case Opt_tpgt: 1856 ret = match_int(args, &arg); 1857 if (ret) 1858 goto out; 1859 tpgt = (u16)arg; 1860 break; 1861 case Opt_port_rtpi: 1862 ret = match_int(args, &arg); 1863 if (ret) 1864 goto out; 1865 break; 1866 case Opt_target_lun: 1867 ret = match_u64(args, &tmp_ll); 1868 if (ret) 1869 goto out; 1870 target_lun = (u64)tmp_ll; 1871 break; 1872 default: 1873 break; 1874 } 1875 } 1876 1877 if (!i_port || !t_port || !sa_res_key) { 1878 pr_err("Illegal parameters for APTPL registration\n"); 1879 ret = -EINVAL; 1880 goto out; 1881 } 1882 1883 if (res_holder && !(type)) { 1884 pr_err("Illegal PR type: 0x%02x for reservation" 1885 " holder\n", type); 1886 ret = -EINVAL; 1887 goto out; 1888 } 1889 1890 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, 1891 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 1892 res_holder, all_tg_pt, type); 1893 out: 1894 kfree(i_fabric); 1895 kfree(i_port); 1896 kfree(isid); 1897 kfree(t_fabric); 1898 kfree(t_port); 1899 kfree(orig); 1900 return (ret == 0) ? count : ret; 1901 } 1902 1903 1904 CONFIGFS_ATTR_RO(target_pr_, res_holder); 1905 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts); 1906 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation); 1907 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port); 1908 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts); 1909 CONFIGFS_ATTR_RO(target_pr_, res_pr_type); 1910 CONFIGFS_ATTR_RO(target_pr_, res_type); 1911 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active); 1912 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata); 1913 1914 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 1915 &target_pr_attr_res_holder, 1916 &target_pr_attr_res_pr_all_tgt_pts, 1917 &target_pr_attr_res_pr_generation, 1918 &target_pr_attr_res_pr_holder_tg_port, 1919 &target_pr_attr_res_pr_registered_i_pts, 1920 &target_pr_attr_res_pr_type, 1921 &target_pr_attr_res_type, 1922 &target_pr_attr_res_aptpl_active, 1923 &target_pr_attr_res_aptpl_metadata, 1924 NULL, 1925 }; 1926 1927 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs); 1928 1929 /* End functions for struct config_item_type tb_dev_pr_cit */ 1930 1931 /* Start functions for struct config_item_type tb_dev_cit */ 1932 1933 static inline struct se_device *to_device(struct config_item *item) 1934 { 1935 return container_of(to_config_group(item), struct se_device, dev_group); 1936 } 1937 1938 static ssize_t target_dev_info_show(struct config_item *item, char *page) 1939 { 1940 struct se_device *dev = to_device(item); 1941 int bl = 0; 1942 ssize_t read_bytes = 0; 1943 1944 transport_dump_dev_state(dev, page, &bl); 1945 read_bytes += bl; 1946 read_bytes += dev->transport->show_configfs_dev_params(dev, 1947 page+read_bytes); 1948 return read_bytes; 1949 } 1950 1951 static ssize_t target_dev_control_store(struct config_item *item, 1952 const char *page, size_t count) 1953 { 1954 struct se_device *dev = to_device(item); 1955 1956 return dev->transport->set_configfs_dev_params(dev, page, count); 1957 } 1958 1959 static ssize_t target_dev_alias_show(struct config_item *item, char *page) 1960 { 1961 struct se_device *dev = to_device(item); 1962 1963 if (!(dev->dev_flags & DF_USING_ALIAS)) 1964 return 0; 1965 1966 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); 1967 } 1968 1969 static ssize_t target_dev_alias_store(struct config_item *item, 1970 const char *page, size_t count) 1971 { 1972 struct se_device *dev = to_device(item); 1973 struct se_hba *hba = dev->se_hba; 1974 ssize_t read_bytes; 1975 1976 if (count > (SE_DEV_ALIAS_LEN-1)) { 1977 pr_err("alias count: %d exceeds" 1978 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 1979 SE_DEV_ALIAS_LEN-1); 1980 return -EINVAL; 1981 } 1982 1983 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); 1984 if (!read_bytes) 1985 return -EINVAL; 1986 if (dev->dev_alias[read_bytes - 1] == '\n') 1987 dev->dev_alias[read_bytes - 1] = '\0'; 1988 1989 dev->dev_flags |= DF_USING_ALIAS; 1990 1991 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 1992 config_item_name(&hba->hba_group.cg_item), 1993 config_item_name(&dev->dev_group.cg_item), 1994 dev->dev_alias); 1995 1996 return read_bytes; 1997 } 1998 1999 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page) 2000 { 2001 struct se_device *dev = to_device(item); 2002 2003 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) 2004 return 0; 2005 2006 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); 2007 } 2008 2009 static ssize_t target_dev_udev_path_store(struct config_item *item, 2010 const char *page, size_t count) 2011 { 2012 struct se_device *dev = to_device(item); 2013 struct se_hba *hba = dev->se_hba; 2014 ssize_t read_bytes; 2015 2016 if (count > (SE_UDEV_PATH_LEN-1)) { 2017 pr_err("udev_path count: %d exceeds" 2018 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 2019 SE_UDEV_PATH_LEN-1); 2020 return -EINVAL; 2021 } 2022 2023 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, 2024 "%s", page); 2025 if (!read_bytes) 2026 return -EINVAL; 2027 if (dev->udev_path[read_bytes - 1] == '\n') 2028 dev->udev_path[read_bytes - 1] = '\0'; 2029 2030 dev->dev_flags |= DF_USING_UDEV_PATH; 2031 2032 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 2033 config_item_name(&hba->hba_group.cg_item), 2034 config_item_name(&dev->dev_group.cg_item), 2035 dev->udev_path); 2036 2037 return read_bytes; 2038 } 2039 2040 static ssize_t target_dev_enable_show(struct config_item *item, char *page) 2041 { 2042 struct se_device *dev = to_device(item); 2043 2044 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev)); 2045 } 2046 2047 static ssize_t target_dev_enable_store(struct config_item *item, 2048 const char *page, size_t count) 2049 { 2050 struct se_device *dev = to_device(item); 2051 char *ptr; 2052 int ret; 2053 2054 ptr = strstr(page, "1"); 2055 if (!ptr) { 2056 pr_err("For dev_enable ops, only valid value" 2057 " is \"1\"\n"); 2058 return -EINVAL; 2059 } 2060 2061 ret = target_configure_device(dev); 2062 if (ret) 2063 return ret; 2064 return count; 2065 } 2066 2067 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page) 2068 { 2069 struct se_device *dev = to_device(item); 2070 struct config_item *lu_ci; 2071 struct t10_alua_lu_gp *lu_gp; 2072 struct t10_alua_lu_gp_member *lu_gp_mem; 2073 ssize_t len = 0; 2074 2075 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2076 if (!lu_gp_mem) 2077 return 0; 2078 2079 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2080 lu_gp = lu_gp_mem->lu_gp; 2081 if (lu_gp) { 2082 lu_ci = &lu_gp->lu_gp_group.cg_item; 2083 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 2084 config_item_name(lu_ci), lu_gp->lu_gp_id); 2085 } 2086 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2087 2088 return len; 2089 } 2090 2091 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item, 2092 const char *page, size_t count) 2093 { 2094 struct se_device *dev = to_device(item); 2095 struct se_hba *hba = dev->se_hba; 2096 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 2097 struct t10_alua_lu_gp_member *lu_gp_mem; 2098 unsigned char buf[LU_GROUP_NAME_BUF]; 2099 int move = 0; 2100 2101 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2102 if (!lu_gp_mem) 2103 return count; 2104 2105 if (count > LU_GROUP_NAME_BUF) { 2106 pr_err("ALUA LU Group Alias too large!\n"); 2107 return -EINVAL; 2108 } 2109 memset(buf, 0, LU_GROUP_NAME_BUF); 2110 memcpy(buf, page, count); 2111 /* 2112 * Any ALUA logical unit alias besides "NULL" means we will be 2113 * making a new group association. 2114 */ 2115 if (strcmp(strstrip(buf), "NULL")) { 2116 /* 2117 * core_alua_get_lu_gp_by_name() will increment reference to 2118 * struct t10_alua_lu_gp. This reference is released with 2119 * core_alua_get_lu_gp_by_name below(). 2120 */ 2121 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 2122 if (!lu_gp_new) 2123 return -ENODEV; 2124 } 2125 2126 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2127 lu_gp = lu_gp_mem->lu_gp; 2128 if (lu_gp) { 2129 /* 2130 * Clearing an existing lu_gp association, and replacing 2131 * with NULL 2132 */ 2133 if (!lu_gp_new) { 2134 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 2135 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 2136 " %hu\n", 2137 config_item_name(&hba->hba_group.cg_item), 2138 config_item_name(&dev->dev_group.cg_item), 2139 config_item_name(&lu_gp->lu_gp_group.cg_item), 2140 lu_gp->lu_gp_id); 2141 2142 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2143 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2144 2145 return count; 2146 } 2147 /* 2148 * Removing existing association of lu_gp_mem with lu_gp 2149 */ 2150 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2151 move = 1; 2152 } 2153 /* 2154 * Associate lu_gp_mem with lu_gp_new. 2155 */ 2156 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 2157 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2158 2159 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 2160 " core/alua/lu_gps/%s, ID: %hu\n", 2161 (move) ? "Moving" : "Adding", 2162 config_item_name(&hba->hba_group.cg_item), 2163 config_item_name(&dev->dev_group.cg_item), 2164 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 2165 lu_gp_new->lu_gp_id); 2166 2167 core_alua_put_lu_gp_from_name(lu_gp_new); 2168 return count; 2169 } 2170 2171 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page) 2172 { 2173 struct se_device *dev = to_device(item); 2174 struct t10_alua_lba_map *map; 2175 struct t10_alua_lba_map_member *mem; 2176 char *b = page; 2177 int bl = 0; 2178 char state; 2179 2180 spin_lock(&dev->t10_alua.lba_map_lock); 2181 if (!list_empty(&dev->t10_alua.lba_map_list)) 2182 bl += sprintf(b + bl, "%u %u\n", 2183 dev->t10_alua.lba_map_segment_size, 2184 dev->t10_alua.lba_map_segment_multiplier); 2185 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) { 2186 bl += sprintf(b + bl, "%llu %llu", 2187 map->lba_map_first_lba, map->lba_map_last_lba); 2188 list_for_each_entry(mem, &map->lba_map_mem_list, 2189 lba_map_mem_list) { 2190 switch (mem->lba_map_mem_alua_state) { 2191 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: 2192 state = 'O'; 2193 break; 2194 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: 2195 state = 'A'; 2196 break; 2197 case ALUA_ACCESS_STATE_STANDBY: 2198 state = 'S'; 2199 break; 2200 case ALUA_ACCESS_STATE_UNAVAILABLE: 2201 state = 'U'; 2202 break; 2203 default: 2204 state = '.'; 2205 break; 2206 } 2207 bl += sprintf(b + bl, " %d:%c", 2208 mem->lba_map_mem_alua_pg_id, state); 2209 } 2210 bl += sprintf(b + bl, "\n"); 2211 } 2212 spin_unlock(&dev->t10_alua.lba_map_lock); 2213 return bl; 2214 } 2215 2216 static ssize_t target_dev_lba_map_store(struct config_item *item, 2217 const char *page, size_t count) 2218 { 2219 struct se_device *dev = to_device(item); 2220 struct t10_alua_lba_map *lba_map = NULL; 2221 struct list_head lba_list; 2222 char *map_entries, *orig, *ptr; 2223 char state; 2224 int pg_num = -1, pg; 2225 int ret = 0, num = 0, pg_id, alua_state; 2226 unsigned long start_lba = -1, end_lba = -1; 2227 unsigned long segment_size = -1, segment_mult = -1; 2228 2229 orig = map_entries = kstrdup(page, GFP_KERNEL); 2230 if (!map_entries) 2231 return -ENOMEM; 2232 2233 INIT_LIST_HEAD(&lba_list); 2234 while ((ptr = strsep(&map_entries, "\n")) != NULL) { 2235 if (!*ptr) 2236 continue; 2237 2238 if (num == 0) { 2239 if (sscanf(ptr, "%lu %lu\n", 2240 &segment_size, &segment_mult) != 2) { 2241 pr_err("Invalid line %d\n", num); 2242 ret = -EINVAL; 2243 break; 2244 } 2245 num++; 2246 continue; 2247 } 2248 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) { 2249 pr_err("Invalid line %d\n", num); 2250 ret = -EINVAL; 2251 break; 2252 } 2253 ptr = strchr(ptr, ' '); 2254 if (!ptr) { 2255 pr_err("Invalid line %d, missing end lba\n", num); 2256 ret = -EINVAL; 2257 break; 2258 } 2259 ptr++; 2260 ptr = strchr(ptr, ' '); 2261 if (!ptr) { 2262 pr_err("Invalid line %d, missing state definitions\n", 2263 num); 2264 ret = -EINVAL; 2265 break; 2266 } 2267 ptr++; 2268 lba_map = core_alua_allocate_lba_map(&lba_list, 2269 start_lba, end_lba); 2270 if (IS_ERR(lba_map)) { 2271 ret = PTR_ERR(lba_map); 2272 break; 2273 } 2274 pg = 0; 2275 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) { 2276 switch (state) { 2277 case 'O': 2278 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED; 2279 break; 2280 case 'A': 2281 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED; 2282 break; 2283 case 'S': 2284 alua_state = ALUA_ACCESS_STATE_STANDBY; 2285 break; 2286 case 'U': 2287 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE; 2288 break; 2289 default: 2290 pr_err("Invalid ALUA state '%c'\n", state); 2291 ret = -EINVAL; 2292 goto out; 2293 } 2294 2295 ret = core_alua_allocate_lba_map_mem(lba_map, 2296 pg_id, alua_state); 2297 if (ret) { 2298 pr_err("Invalid target descriptor %d:%c " 2299 "at line %d\n", 2300 pg_id, state, num); 2301 break; 2302 } 2303 pg++; 2304 ptr = strchr(ptr, ' '); 2305 if (ptr) 2306 ptr++; 2307 else 2308 break; 2309 } 2310 if (pg_num == -1) 2311 pg_num = pg; 2312 else if (pg != pg_num) { 2313 pr_err("Only %d from %d port groups definitions " 2314 "at line %d\n", pg, pg_num, num); 2315 ret = -EINVAL; 2316 break; 2317 } 2318 num++; 2319 } 2320 out: 2321 if (ret) { 2322 core_alua_free_lba_map(&lba_list); 2323 count = ret; 2324 } else 2325 core_alua_set_lba_map(dev, &lba_list, 2326 segment_size, segment_mult); 2327 kfree(orig); 2328 return count; 2329 } 2330 2331 CONFIGFS_ATTR_RO(target_dev_, info); 2332 CONFIGFS_ATTR_WO(target_dev_, control); 2333 CONFIGFS_ATTR(target_dev_, alias); 2334 CONFIGFS_ATTR(target_dev_, udev_path); 2335 CONFIGFS_ATTR(target_dev_, enable); 2336 CONFIGFS_ATTR(target_dev_, alua_lu_gp); 2337 CONFIGFS_ATTR(target_dev_, lba_map); 2338 2339 static struct configfs_attribute *target_core_dev_attrs[] = { 2340 &target_dev_attr_info, 2341 &target_dev_attr_control, 2342 &target_dev_attr_alias, 2343 &target_dev_attr_udev_path, 2344 &target_dev_attr_enable, 2345 &target_dev_attr_alua_lu_gp, 2346 &target_dev_attr_lba_map, 2347 NULL, 2348 }; 2349 2350 static void target_core_dev_release(struct config_item *item) 2351 { 2352 struct config_group *dev_cg = to_config_group(item); 2353 struct se_device *dev = 2354 container_of(dev_cg, struct se_device, dev_group); 2355 2356 target_free_device(dev); 2357 } 2358 2359 /* 2360 * Used in target_core_fabric_configfs.c to verify valid se_device symlink 2361 * within target_fabric_port_link() 2362 */ 2363 struct configfs_item_operations target_core_dev_item_ops = { 2364 .release = target_core_dev_release, 2365 }; 2366 2367 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs); 2368 2369 /* End functions for struct config_item_type tb_dev_cit */ 2370 2371 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 2372 2373 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item) 2374 { 2375 return container_of(to_config_group(item), struct t10_alua_lu_gp, 2376 lu_gp_group); 2377 } 2378 2379 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page) 2380 { 2381 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2382 2383 if (!lu_gp->lu_gp_valid_id) 2384 return 0; 2385 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2386 } 2387 2388 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item, 2389 const char *page, size_t count) 2390 { 2391 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2392 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2393 unsigned long lu_gp_id; 2394 int ret; 2395 2396 ret = kstrtoul(page, 0, &lu_gp_id); 2397 if (ret < 0) { 2398 pr_err("kstrtoul() returned %d for" 2399 " lu_gp_id\n", ret); 2400 return ret; 2401 } 2402 if (lu_gp_id > 0x0000ffff) { 2403 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 2404 " 0x0000ffff\n", lu_gp_id); 2405 return -EINVAL; 2406 } 2407 2408 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2409 if (ret < 0) 2410 return -EINVAL; 2411 2412 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 2413 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2414 config_item_name(&alua_lu_gp_cg->cg_item), 2415 lu_gp->lu_gp_id); 2416 2417 return count; 2418 } 2419 2420 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page) 2421 { 2422 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2423 struct se_device *dev; 2424 struct se_hba *hba; 2425 struct t10_alua_lu_gp_member *lu_gp_mem; 2426 ssize_t len = 0, cur_len; 2427 unsigned char buf[LU_GROUP_NAME_BUF]; 2428 2429 memset(buf, 0, LU_GROUP_NAME_BUF); 2430 2431 spin_lock(&lu_gp->lu_gp_lock); 2432 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2433 dev = lu_gp_mem->lu_gp_mem_dev; 2434 hba = dev->se_hba; 2435 2436 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 2437 config_item_name(&hba->hba_group.cg_item), 2438 config_item_name(&dev->dev_group.cg_item)); 2439 cur_len++; /* Extra byte for NULL terminator */ 2440 2441 if ((cur_len + len) > PAGE_SIZE) { 2442 pr_warn("Ran out of lu_gp_show_attr" 2443 "_members buffer\n"); 2444 break; 2445 } 2446 memcpy(page+len, buf, cur_len); 2447 len += cur_len; 2448 } 2449 spin_unlock(&lu_gp->lu_gp_lock); 2450 2451 return len; 2452 } 2453 2454 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id); 2455 CONFIGFS_ATTR_RO(target_lu_gp_, members); 2456 2457 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2458 &target_lu_gp_attr_lu_gp_id, 2459 &target_lu_gp_attr_members, 2460 NULL, 2461 }; 2462 2463 static void target_core_alua_lu_gp_release(struct config_item *item) 2464 { 2465 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2466 struct t10_alua_lu_gp, lu_gp_group); 2467 2468 core_alua_free_lu_gp(lu_gp); 2469 } 2470 2471 static struct configfs_item_operations target_core_alua_lu_gp_ops = { 2472 .release = target_core_alua_lu_gp_release, 2473 }; 2474 2475 static const struct config_item_type target_core_alua_lu_gp_cit = { 2476 .ct_item_ops = &target_core_alua_lu_gp_ops, 2477 .ct_attrs = target_core_alua_lu_gp_attrs, 2478 .ct_owner = THIS_MODULE, 2479 }; 2480 2481 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2482 2483 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2484 2485 static struct config_group *target_core_alua_create_lu_gp( 2486 struct config_group *group, 2487 const char *name) 2488 { 2489 struct t10_alua_lu_gp *lu_gp; 2490 struct config_group *alua_lu_gp_cg = NULL; 2491 struct config_item *alua_lu_gp_ci = NULL; 2492 2493 lu_gp = core_alua_allocate_lu_gp(name, 0); 2494 if (IS_ERR(lu_gp)) 2495 return NULL; 2496 2497 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2498 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2499 2500 config_group_init_type_name(alua_lu_gp_cg, name, 2501 &target_core_alua_lu_gp_cit); 2502 2503 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2504 " Group: core/alua/lu_gps/%s\n", 2505 config_item_name(alua_lu_gp_ci)); 2506 2507 return alua_lu_gp_cg; 2508 2509 } 2510 2511 static void target_core_alua_drop_lu_gp( 2512 struct config_group *group, 2513 struct config_item *item) 2514 { 2515 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2516 struct t10_alua_lu_gp, lu_gp_group); 2517 2518 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2519 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2520 config_item_name(item), lu_gp->lu_gp_id); 2521 /* 2522 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 2523 * -> target_core_alua_lu_gp_release() 2524 */ 2525 config_item_put(item); 2526 } 2527 2528 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2529 .make_group = &target_core_alua_create_lu_gp, 2530 .drop_item = &target_core_alua_drop_lu_gp, 2531 }; 2532 2533 static const struct config_item_type target_core_alua_lu_gps_cit = { 2534 .ct_item_ops = NULL, 2535 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2536 .ct_owner = THIS_MODULE, 2537 }; 2538 2539 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2540 2541 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2542 2543 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item) 2544 { 2545 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp, 2546 tg_pt_gp_group); 2547 } 2548 2549 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item, 2550 char *page) 2551 { 2552 return sprintf(page, "%d\n", 2553 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state); 2554 } 2555 2556 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item, 2557 const char *page, size_t count) 2558 { 2559 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2560 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; 2561 unsigned long tmp; 2562 int new_state, ret; 2563 2564 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2565 pr_err("Unable to do implicit ALUA on non valid" 2566 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id); 2567 return -EINVAL; 2568 } 2569 if (!target_dev_configured(dev)) { 2570 pr_err("Unable to set alua_access_state while device is" 2571 " not configured\n"); 2572 return -ENODEV; 2573 } 2574 2575 ret = kstrtoul(page, 0, &tmp); 2576 if (ret < 0) { 2577 pr_err("Unable to extract new ALUA access state from" 2578 " %s\n", page); 2579 return ret; 2580 } 2581 new_state = (int)tmp; 2582 2583 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) { 2584 pr_err("Unable to process implicit configfs ALUA" 2585 " transition while TPGS_IMPLICIT_ALUA is disabled\n"); 2586 return -EINVAL; 2587 } 2588 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA && 2589 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) { 2590 /* LBA DEPENDENT is only allowed with implicit ALUA */ 2591 pr_err("Unable to process implicit configfs ALUA transition" 2592 " while explicit ALUA management is enabled\n"); 2593 return -EINVAL; 2594 } 2595 2596 ret = core_alua_do_port_transition(tg_pt_gp, dev, 2597 NULL, NULL, new_state, 0); 2598 return (!ret) ? count : -EINVAL; 2599 } 2600 2601 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item, 2602 char *page) 2603 { 2604 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2605 return sprintf(page, "%s\n", 2606 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2607 } 2608 2609 static ssize_t target_tg_pt_gp_alua_access_status_store( 2610 struct config_item *item, const char *page, size_t count) 2611 { 2612 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2613 unsigned long tmp; 2614 int new_status, ret; 2615 2616 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2617 pr_err("Unable to do set ALUA access status on non" 2618 " valid tg_pt_gp ID: %hu\n", 2619 tg_pt_gp->tg_pt_gp_valid_id); 2620 return -EINVAL; 2621 } 2622 2623 ret = kstrtoul(page, 0, &tmp); 2624 if (ret < 0) { 2625 pr_err("Unable to extract new ALUA access status" 2626 " from %s\n", page); 2627 return ret; 2628 } 2629 new_status = (int)tmp; 2630 2631 if ((new_status != ALUA_STATUS_NONE) && 2632 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && 2633 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { 2634 pr_err("Illegal ALUA access status: 0x%02x\n", 2635 new_status); 2636 return -EINVAL; 2637 } 2638 2639 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2640 return count; 2641 } 2642 2643 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item, 2644 char *page) 2645 { 2646 return core_alua_show_access_type(to_tg_pt_gp(item), page); 2647 } 2648 2649 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item, 2650 const char *page, size_t count) 2651 { 2652 return core_alua_store_access_type(to_tg_pt_gp(item), page, count); 2653 } 2654 2655 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \ 2656 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \ 2657 struct config_item *item, char *p) \ 2658 { \ 2659 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 2660 return sprintf(p, "%d\n", \ 2661 !!(t->tg_pt_gp_alua_supported_states & _bit)); \ 2662 } \ 2663 \ 2664 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \ 2665 struct config_item *item, const char *p, size_t c) \ 2666 { \ 2667 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 2668 unsigned long tmp; \ 2669 int ret; \ 2670 \ 2671 if (!t->tg_pt_gp_valid_id) { \ 2672 pr_err("Unable to do set " #_name " ALUA state on non" \ 2673 " valid tg_pt_gp ID: %hu\n", \ 2674 t->tg_pt_gp_valid_id); \ 2675 return -EINVAL; \ 2676 } \ 2677 \ 2678 ret = kstrtoul(p, 0, &tmp); \ 2679 if (ret < 0) { \ 2680 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \ 2681 return -EINVAL; \ 2682 } \ 2683 if (tmp > 1) { \ 2684 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \ 2685 return -EINVAL; \ 2686 } \ 2687 if (tmp) \ 2688 t->tg_pt_gp_alua_supported_states |= _bit; \ 2689 else \ 2690 t->tg_pt_gp_alua_supported_states &= ~_bit; \ 2691 \ 2692 return c; \ 2693 } 2694 2695 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP); 2696 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP); 2697 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP); 2698 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP); 2699 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP); 2700 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP); 2701 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP); 2702 2703 static ssize_t target_tg_pt_gp_alua_write_metadata_show( 2704 struct config_item *item, char *page) 2705 { 2706 return sprintf(page, "%d\n", 2707 to_tg_pt_gp(item)->tg_pt_gp_write_metadata); 2708 } 2709 2710 static ssize_t target_tg_pt_gp_alua_write_metadata_store( 2711 struct config_item *item, const char *page, size_t count) 2712 { 2713 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2714 unsigned long tmp; 2715 int ret; 2716 2717 ret = kstrtoul(page, 0, &tmp); 2718 if (ret < 0) { 2719 pr_err("Unable to extract alua_write_metadata\n"); 2720 return ret; 2721 } 2722 2723 if ((tmp != 0) && (tmp != 1)) { 2724 pr_err("Illegal value for alua_write_metadata:" 2725 " %lu\n", tmp); 2726 return -EINVAL; 2727 } 2728 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 2729 2730 return count; 2731 } 2732 2733 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item, 2734 char *page) 2735 { 2736 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page); 2737 } 2738 2739 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item, 2740 const char *page, size_t count) 2741 { 2742 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page, 2743 count); 2744 } 2745 2746 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item, 2747 char *page) 2748 { 2749 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page); 2750 } 2751 2752 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item, 2753 const char *page, size_t count) 2754 { 2755 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page, 2756 count); 2757 } 2758 2759 static ssize_t target_tg_pt_gp_implicit_trans_secs_show( 2760 struct config_item *item, char *page) 2761 { 2762 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page); 2763 } 2764 2765 static ssize_t target_tg_pt_gp_implicit_trans_secs_store( 2766 struct config_item *item, const char *page, size_t count) 2767 { 2768 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page, 2769 count); 2770 } 2771 2772 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item, 2773 char *page) 2774 { 2775 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page); 2776 } 2777 2778 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item, 2779 const char *page, size_t count) 2780 { 2781 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count); 2782 } 2783 2784 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item, 2785 char *page) 2786 { 2787 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2788 2789 if (!tg_pt_gp->tg_pt_gp_valid_id) 2790 return 0; 2791 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 2792 } 2793 2794 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item, 2795 const char *page, size_t count) 2796 { 2797 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2798 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2799 unsigned long tg_pt_gp_id; 2800 int ret; 2801 2802 ret = kstrtoul(page, 0, &tg_pt_gp_id); 2803 if (ret < 0) { 2804 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n", 2805 page); 2806 return ret; 2807 } 2808 if (tg_pt_gp_id > 0x0000ffff) { 2809 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n", 2810 tg_pt_gp_id); 2811 return -EINVAL; 2812 } 2813 2814 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 2815 if (ret < 0) 2816 return -EINVAL; 2817 2818 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 2819 "core/alua/tg_pt_gps/%s to ID: %hu\n", 2820 config_item_name(&alua_tg_pt_gp_cg->cg_item), 2821 tg_pt_gp->tg_pt_gp_id); 2822 2823 return count; 2824 } 2825 2826 static ssize_t target_tg_pt_gp_members_show(struct config_item *item, 2827 char *page) 2828 { 2829 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2830 struct se_lun *lun; 2831 ssize_t len = 0, cur_len; 2832 unsigned char buf[TG_PT_GROUP_NAME_BUF]; 2833 2834 memset(buf, 0, TG_PT_GROUP_NAME_BUF); 2835 2836 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 2837 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, 2838 lun_tg_pt_gp_link) { 2839 struct se_portal_group *tpg = lun->lun_tpg; 2840 2841 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 2842 "/%s\n", tpg->se_tpg_tfo->fabric_name, 2843 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 2844 tpg->se_tpg_tfo->tpg_get_tag(tpg), 2845 config_item_name(&lun->lun_group.cg_item)); 2846 cur_len++; /* Extra byte for NULL terminator */ 2847 2848 if ((cur_len + len) > PAGE_SIZE) { 2849 pr_warn("Ran out of lu_gp_show_attr" 2850 "_members buffer\n"); 2851 break; 2852 } 2853 memcpy(page+len, buf, cur_len); 2854 len += cur_len; 2855 } 2856 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 2857 2858 return len; 2859 } 2860 2861 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state); 2862 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status); 2863 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type); 2864 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning); 2865 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline); 2866 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent); 2867 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable); 2868 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby); 2869 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized); 2870 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized); 2871 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata); 2872 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs); 2873 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs); 2874 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs); 2875 CONFIGFS_ATTR(target_tg_pt_gp_, preferred); 2876 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id); 2877 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members); 2878 2879 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 2880 &target_tg_pt_gp_attr_alua_access_state, 2881 &target_tg_pt_gp_attr_alua_access_status, 2882 &target_tg_pt_gp_attr_alua_access_type, 2883 &target_tg_pt_gp_attr_alua_support_transitioning, 2884 &target_tg_pt_gp_attr_alua_support_offline, 2885 &target_tg_pt_gp_attr_alua_support_lba_dependent, 2886 &target_tg_pt_gp_attr_alua_support_unavailable, 2887 &target_tg_pt_gp_attr_alua_support_standby, 2888 &target_tg_pt_gp_attr_alua_support_active_nonoptimized, 2889 &target_tg_pt_gp_attr_alua_support_active_optimized, 2890 &target_tg_pt_gp_attr_alua_write_metadata, 2891 &target_tg_pt_gp_attr_nonop_delay_msecs, 2892 &target_tg_pt_gp_attr_trans_delay_msecs, 2893 &target_tg_pt_gp_attr_implicit_trans_secs, 2894 &target_tg_pt_gp_attr_preferred, 2895 &target_tg_pt_gp_attr_tg_pt_gp_id, 2896 &target_tg_pt_gp_attr_members, 2897 NULL, 2898 }; 2899 2900 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 2901 { 2902 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2903 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2904 2905 core_alua_free_tg_pt_gp(tg_pt_gp); 2906 } 2907 2908 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 2909 .release = target_core_alua_tg_pt_gp_release, 2910 }; 2911 2912 static const struct config_item_type target_core_alua_tg_pt_gp_cit = { 2913 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 2914 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 2915 .ct_owner = THIS_MODULE, 2916 }; 2917 2918 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2919 2920 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 2921 2922 static struct config_group *target_core_alua_create_tg_pt_gp( 2923 struct config_group *group, 2924 const char *name) 2925 { 2926 struct t10_alua *alua = container_of(group, struct t10_alua, 2927 alua_tg_pt_gps_group); 2928 struct t10_alua_tg_pt_gp *tg_pt_gp; 2929 struct config_group *alua_tg_pt_gp_cg = NULL; 2930 struct config_item *alua_tg_pt_gp_ci = NULL; 2931 2932 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0); 2933 if (!tg_pt_gp) 2934 return NULL; 2935 2936 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2937 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 2938 2939 config_group_init_type_name(alua_tg_pt_gp_cg, name, 2940 &target_core_alua_tg_pt_gp_cit); 2941 2942 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 2943 " Group: alua/tg_pt_gps/%s\n", 2944 config_item_name(alua_tg_pt_gp_ci)); 2945 2946 return alua_tg_pt_gp_cg; 2947 } 2948 2949 static void target_core_alua_drop_tg_pt_gp( 2950 struct config_group *group, 2951 struct config_item *item) 2952 { 2953 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2954 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2955 2956 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 2957 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 2958 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 2959 /* 2960 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 2961 * -> target_core_alua_tg_pt_gp_release(). 2962 */ 2963 config_item_put(item); 2964 } 2965 2966 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 2967 .make_group = &target_core_alua_create_tg_pt_gp, 2968 .drop_item = &target_core_alua_drop_tg_pt_gp, 2969 }; 2970 2971 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL); 2972 2973 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 2974 2975 /* Start functions for struct config_item_type target_core_alua_cit */ 2976 2977 /* 2978 * target_core_alua_cit is a ConfigFS group that lives under 2979 * /sys/kernel/config/target/core/alua. There are default groups 2980 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 2981 * target_core_alua_cit in target_core_init_configfs() below. 2982 */ 2983 static const struct config_item_type target_core_alua_cit = { 2984 .ct_item_ops = NULL, 2985 .ct_attrs = NULL, 2986 .ct_owner = THIS_MODULE, 2987 }; 2988 2989 /* End functions for struct config_item_type target_core_alua_cit */ 2990 2991 /* Start functions for struct config_item_type tb_dev_stat_cit */ 2992 2993 static struct config_group *target_core_stat_mkdir( 2994 struct config_group *group, 2995 const char *name) 2996 { 2997 return ERR_PTR(-ENOSYS); 2998 } 2999 3000 static void target_core_stat_rmdir( 3001 struct config_group *group, 3002 struct config_item *item) 3003 { 3004 return; 3005 } 3006 3007 static struct configfs_group_operations target_core_stat_group_ops = { 3008 .make_group = &target_core_stat_mkdir, 3009 .drop_item = &target_core_stat_rmdir, 3010 }; 3011 3012 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL); 3013 3014 /* End functions for struct config_item_type tb_dev_stat_cit */ 3015 3016 /* Start functions for struct config_item_type target_core_hba_cit */ 3017 3018 static struct config_group *target_core_make_subdev( 3019 struct config_group *group, 3020 const char *name) 3021 { 3022 struct t10_alua_tg_pt_gp *tg_pt_gp; 3023 struct config_item *hba_ci = &group->cg_item; 3024 struct se_hba *hba = item_to_hba(hba_ci); 3025 struct target_backend *tb = hba->backend; 3026 struct se_device *dev; 3027 int errno = -ENOMEM, ret; 3028 3029 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 3030 if (ret) 3031 return ERR_PTR(ret); 3032 3033 dev = target_alloc_device(hba, name); 3034 if (!dev) 3035 goto out_unlock; 3036 3037 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit); 3038 3039 config_group_init_type_name(&dev->dev_action_group, "action", 3040 &tb->tb_dev_action_cit); 3041 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group); 3042 3043 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib", 3044 &tb->tb_dev_attrib_cit); 3045 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group); 3046 3047 config_group_init_type_name(&dev->dev_pr_group, "pr", 3048 &tb->tb_dev_pr_cit); 3049 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group); 3050 3051 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn", 3052 &tb->tb_dev_wwn_cit); 3053 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group, 3054 &dev->dev_group); 3055 3056 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group, 3057 "alua", &tb->tb_dev_alua_tg_pt_gps_cit); 3058 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group, 3059 &dev->dev_group); 3060 3061 config_group_init_type_name(&dev->dev_stat_grps.stat_group, 3062 "statistics", &tb->tb_dev_stat_cit); 3063 configfs_add_default_group(&dev->dev_stat_grps.stat_group, 3064 &dev->dev_group); 3065 3066 /* 3067 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 3068 */ 3069 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1); 3070 if (!tg_pt_gp) 3071 goto out_free_device; 3072 dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 3073 3074 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 3075 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 3076 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group, 3077 &dev->t10_alua.alua_tg_pt_gps_group); 3078 3079 /* 3080 * Add core/$HBA/$DEV/statistics/ default groups 3081 */ 3082 target_stat_setup_dev_default_groups(dev); 3083 3084 mutex_unlock(&hba->hba_access_mutex); 3085 return &dev->dev_group; 3086 3087 out_free_device: 3088 target_free_device(dev); 3089 out_unlock: 3090 mutex_unlock(&hba->hba_access_mutex); 3091 return ERR_PTR(errno); 3092 } 3093 3094 static void target_core_drop_subdev( 3095 struct config_group *group, 3096 struct config_item *item) 3097 { 3098 struct config_group *dev_cg = to_config_group(item); 3099 struct se_device *dev = 3100 container_of(dev_cg, struct se_device, dev_group); 3101 struct se_hba *hba; 3102 3103 hba = item_to_hba(&dev->se_hba->hba_group.cg_item); 3104 3105 mutex_lock(&hba->hba_access_mutex); 3106 3107 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group); 3108 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group); 3109 3110 /* 3111 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 3112 * directly from target_core_alua_tg_pt_gp_release(). 3113 */ 3114 dev->t10_alua.default_tg_pt_gp = NULL; 3115 3116 configfs_remove_default_groups(dev_cg); 3117 3118 /* 3119 * se_dev is released from target_core_dev_item_ops->release() 3120 */ 3121 config_item_put(item); 3122 mutex_unlock(&hba->hba_access_mutex); 3123 } 3124 3125 static struct configfs_group_operations target_core_hba_group_ops = { 3126 .make_group = target_core_make_subdev, 3127 .drop_item = target_core_drop_subdev, 3128 }; 3129 3130 3131 static inline struct se_hba *to_hba(struct config_item *item) 3132 { 3133 return container_of(to_config_group(item), struct se_hba, hba_group); 3134 } 3135 3136 static ssize_t target_hba_info_show(struct config_item *item, char *page) 3137 { 3138 struct se_hba *hba = to_hba(item); 3139 3140 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 3141 hba->hba_id, hba->backend->ops->name, 3142 TARGET_CORE_VERSION); 3143 } 3144 3145 static ssize_t target_hba_mode_show(struct config_item *item, char *page) 3146 { 3147 struct se_hba *hba = to_hba(item); 3148 int hba_mode = 0; 3149 3150 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 3151 hba_mode = 1; 3152 3153 return sprintf(page, "%d\n", hba_mode); 3154 } 3155 3156 static ssize_t target_hba_mode_store(struct config_item *item, 3157 const char *page, size_t count) 3158 { 3159 struct se_hba *hba = to_hba(item); 3160 unsigned long mode_flag; 3161 int ret; 3162 3163 if (hba->backend->ops->pmode_enable_hba == NULL) 3164 return -EINVAL; 3165 3166 ret = kstrtoul(page, 0, &mode_flag); 3167 if (ret < 0) { 3168 pr_err("Unable to extract hba mode flag: %d\n", ret); 3169 return ret; 3170 } 3171 3172 if (hba->dev_count) { 3173 pr_err("Unable to set hba_mode with active devices\n"); 3174 return -EINVAL; 3175 } 3176 3177 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag); 3178 if (ret < 0) 3179 return -EINVAL; 3180 if (ret > 0) 3181 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 3182 else if (ret == 0) 3183 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 3184 3185 return count; 3186 } 3187 3188 CONFIGFS_ATTR_RO(target_, hba_info); 3189 CONFIGFS_ATTR(target_, hba_mode); 3190 3191 static void target_core_hba_release(struct config_item *item) 3192 { 3193 struct se_hba *hba = container_of(to_config_group(item), 3194 struct se_hba, hba_group); 3195 core_delete_hba(hba); 3196 } 3197 3198 static struct configfs_attribute *target_core_hba_attrs[] = { 3199 &target_attr_hba_info, 3200 &target_attr_hba_mode, 3201 NULL, 3202 }; 3203 3204 static struct configfs_item_operations target_core_hba_item_ops = { 3205 .release = target_core_hba_release, 3206 }; 3207 3208 static const struct config_item_type target_core_hba_cit = { 3209 .ct_item_ops = &target_core_hba_item_ops, 3210 .ct_group_ops = &target_core_hba_group_ops, 3211 .ct_attrs = target_core_hba_attrs, 3212 .ct_owner = THIS_MODULE, 3213 }; 3214 3215 static struct config_group *target_core_call_addhbatotarget( 3216 struct config_group *group, 3217 const char *name) 3218 { 3219 char *se_plugin_str, *str, *str2; 3220 struct se_hba *hba; 3221 char buf[TARGET_CORE_NAME_MAX_LEN]; 3222 unsigned long plugin_dep_id = 0; 3223 int ret; 3224 3225 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN); 3226 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 3227 pr_err("Passed *name strlen(): %d exceeds" 3228 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 3229 TARGET_CORE_NAME_MAX_LEN); 3230 return ERR_PTR(-ENAMETOOLONG); 3231 } 3232 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 3233 3234 str = strstr(buf, "_"); 3235 if (!str) { 3236 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 3237 return ERR_PTR(-EINVAL); 3238 } 3239 se_plugin_str = buf; 3240 /* 3241 * Special case for subsystem plugins that have "_" in their names. 3242 * Namely rd_direct and rd_mcp.. 3243 */ 3244 str2 = strstr(str+1, "_"); 3245 if (str2) { 3246 *str2 = '\0'; /* Terminate for *se_plugin_str */ 3247 str2++; /* Skip to start of plugin dependent ID */ 3248 str = str2; 3249 } else { 3250 *str = '\0'; /* Terminate for *se_plugin_str */ 3251 str++; /* Skip to start of plugin dependent ID */ 3252 } 3253 3254 ret = kstrtoul(str, 0, &plugin_dep_id); 3255 if (ret < 0) { 3256 pr_err("kstrtoul() returned %d for" 3257 " plugin_dep_id\n", ret); 3258 return ERR_PTR(ret); 3259 } 3260 /* 3261 * Load up TCM subsystem plugins if they have not already been loaded. 3262 */ 3263 transport_subsystem_check_init(); 3264 3265 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 3266 if (IS_ERR(hba)) 3267 return ERR_CAST(hba); 3268 3269 config_group_init_type_name(&hba->hba_group, name, 3270 &target_core_hba_cit); 3271 3272 return &hba->hba_group; 3273 } 3274 3275 static void target_core_call_delhbafromtarget( 3276 struct config_group *group, 3277 struct config_item *item) 3278 { 3279 /* 3280 * core_delete_hba() is called from target_core_hba_item_ops->release() 3281 * -> target_core_hba_release() 3282 */ 3283 config_item_put(item); 3284 } 3285 3286 static struct configfs_group_operations target_core_group_ops = { 3287 .make_group = target_core_call_addhbatotarget, 3288 .drop_item = target_core_call_delhbafromtarget, 3289 }; 3290 3291 static const struct config_item_type target_core_cit = { 3292 .ct_item_ops = NULL, 3293 .ct_group_ops = &target_core_group_ops, 3294 .ct_attrs = NULL, 3295 .ct_owner = THIS_MODULE, 3296 }; 3297 3298 /* Stop functions for struct config_item_type target_core_hba_cit */ 3299 3300 void target_setup_backend_cits(struct target_backend *tb) 3301 { 3302 target_core_setup_dev_cit(tb); 3303 target_core_setup_dev_action_cit(tb); 3304 target_core_setup_dev_attrib_cit(tb); 3305 target_core_setup_dev_pr_cit(tb); 3306 target_core_setup_dev_wwn_cit(tb); 3307 target_core_setup_dev_alua_tg_pt_gps_cit(tb); 3308 target_core_setup_dev_stat_cit(tb); 3309 } 3310 3311 static void target_init_dbroot(void) 3312 { 3313 struct file *fp; 3314 3315 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED); 3316 fp = filp_open(db_root_stage, O_RDONLY, 0); 3317 if (IS_ERR(fp)) { 3318 pr_err("db_root: cannot open: %s\n", db_root_stage); 3319 return; 3320 } 3321 if (!S_ISDIR(file_inode(fp)->i_mode)) { 3322 filp_close(fp, NULL); 3323 pr_err("db_root: not a valid directory: %s\n", db_root_stage); 3324 return; 3325 } 3326 filp_close(fp, NULL); 3327 3328 strncpy(db_root, db_root_stage, DB_ROOT_LEN); 3329 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); 3330 } 3331 3332 static int __init target_core_init_configfs(void) 3333 { 3334 struct configfs_subsystem *subsys = &target_core_fabrics; 3335 struct t10_alua_lu_gp *lu_gp; 3336 int ret; 3337 3338 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 3339 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3340 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3341 3342 config_group_init(&subsys->su_group); 3343 mutex_init(&subsys->su_mutex); 3344 3345 ret = init_se_kmem_caches(); 3346 if (ret < 0) 3347 return ret; 3348 /* 3349 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3350 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3351 */ 3352 config_group_init_type_name(&target_core_hbagroup, "core", 3353 &target_core_cit); 3354 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group); 3355 3356 /* 3357 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3358 */ 3359 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit); 3360 configfs_add_default_group(&alua_group, &target_core_hbagroup); 3361 3362 /* 3363 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3364 * groups under /sys/kernel/config/target/core/alua/ 3365 */ 3366 config_group_init_type_name(&alua_lu_gps_group, "lu_gps", 3367 &target_core_alua_lu_gps_cit); 3368 configfs_add_default_group(&alua_lu_gps_group, &alua_group); 3369 3370 /* 3371 * Add core/alua/lu_gps/default_lu_gp 3372 */ 3373 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3374 if (IS_ERR(lu_gp)) { 3375 ret = -ENOMEM; 3376 goto out_global; 3377 } 3378 3379 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3380 &target_core_alua_lu_gp_cit); 3381 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group); 3382 3383 default_lu_gp = lu_gp; 3384 3385 /* 3386 * Register the target_core_mod subsystem with configfs. 3387 */ 3388 ret = configfs_register_subsystem(subsys); 3389 if (ret < 0) { 3390 pr_err("Error %d while registering subsystem %s\n", 3391 ret, subsys->su_group.cg_item.ci_namebuf); 3392 goto out_global; 3393 } 3394 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 3395 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s" 3396 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3397 /* 3398 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3399 */ 3400 ret = rd_module_init(); 3401 if (ret < 0) 3402 goto out; 3403 3404 ret = core_dev_setup_virtual_lun0(); 3405 if (ret < 0) 3406 goto out; 3407 3408 ret = target_xcopy_setup_pt(); 3409 if (ret < 0) 3410 goto out; 3411 3412 target_init_dbroot(); 3413 3414 return 0; 3415 3416 out: 3417 configfs_unregister_subsystem(subsys); 3418 core_dev_release_virtual_lun0(); 3419 rd_module_exit(); 3420 out_global: 3421 if (default_lu_gp) { 3422 core_alua_free_lu_gp(default_lu_gp); 3423 default_lu_gp = NULL; 3424 } 3425 release_se_kmem_caches(); 3426 return ret; 3427 } 3428 3429 static void __exit target_core_exit_configfs(void) 3430 { 3431 configfs_remove_default_groups(&alua_lu_gps_group); 3432 configfs_remove_default_groups(&alua_group); 3433 configfs_remove_default_groups(&target_core_hbagroup); 3434 3435 /* 3436 * We expect subsys->su_group.default_groups to be released 3437 * by configfs subsystem provider logic.. 3438 */ 3439 configfs_unregister_subsystem(&target_core_fabrics); 3440 3441 core_alua_free_lu_gp(default_lu_gp); 3442 default_lu_gp = NULL; 3443 3444 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3445 " Infrastructure\n"); 3446 3447 core_dev_release_virtual_lun0(); 3448 rd_module_exit(); 3449 target_xcopy_release_pt(); 3450 release_se_kmem_caches(); 3451 } 3452 3453 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3454 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3455 MODULE_LICENSE("GPL"); 3456 3457 module_init(target_core_init_configfs); 3458 module_exit(target_core_exit_configfs); 3459