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