1 /******************************************************************************* 2 * Filename: target_core_configfs.c 3 * 4 * This file contains ConfigFS logic for the Generic Target Engine project. 5 * 6 * (c) Copyright 2008-2013 Datera, Inc. 7 * 8 * Nicholas A. Bellinger <nab@kernel.org> 9 * 10 * based on configfs Copyright (C) 2005 Oracle. All rights reserved. 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License as published by 14 * the Free Software Foundation; either version 2 of the License, or 15 * (at your option) any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 ****************************************************************************/ 22 23 #include <linux/module.h> 24 #include <linux/moduleparam.h> 25 #include <generated/utsrelease.h> 26 #include <linux/utsname.h> 27 #include <linux/init.h> 28 #include <linux/fs.h> 29 #include <linux/namei.h> 30 #include <linux/slab.h> 31 #include <linux/types.h> 32 #include <linux/delay.h> 33 #include <linux/unistd.h> 34 #include <linux/string.h> 35 #include <linux/parser.h> 36 #include <linux/syscalls.h> 37 #include <linux/configfs.h> 38 #include <linux/spinlock.h> 39 40 #include <target/target_core_base.h> 41 #include <target/target_core_backend.h> 42 #include <target/target_core_fabric.h> 43 44 #include "target_core_internal.h" 45 #include "target_core_alua.h" 46 #include "target_core_pr.h" 47 #include "target_core_rd.h" 48 #include "target_core_xcopy.h" 49 50 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \ 51 static void target_core_setup_##_name##_cit(struct target_backend *tb) \ 52 { \ 53 struct config_item_type *cit = &tb->tb_##_name##_cit; \ 54 \ 55 cit->ct_item_ops = _item_ops; \ 56 cit->ct_group_ops = _group_ops; \ 57 cit->ct_attrs = _attrs; \ 58 cit->ct_owner = tb->ops->owner; \ 59 pr_debug("Setup generic %s\n", __stringify(_name)); \ 60 } 61 62 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \ 63 static void target_core_setup_##_name##_cit(struct target_backend *tb) \ 64 { \ 65 struct config_item_type *cit = &tb->tb_##_name##_cit; \ 66 \ 67 cit->ct_item_ops = _item_ops; \ 68 cit->ct_group_ops = _group_ops; \ 69 cit->ct_attrs = tb->ops->tb_##_name##_attrs; \ 70 cit->ct_owner = tb->ops->owner; \ 71 pr_debug("Setup generic %s\n", __stringify(_name)); \ 72 } 73 74 extern struct t10_alua_lu_gp *default_lu_gp; 75 76 static LIST_HEAD(g_tf_list); 77 static DEFINE_MUTEX(g_tf_lock); 78 79 static struct config_group target_core_hbagroup; 80 static struct config_group alua_group; 81 static struct config_group alua_lu_gps_group; 82 83 static inline struct se_hba * 84 item_to_hba(struct config_item *item) 85 { 86 return container_of(to_config_group(item), struct se_hba, hba_group); 87 } 88 89 /* 90 * Attributes for /sys/kernel/config/target/ 91 */ 92 static ssize_t target_core_item_version_show(struct config_item *item, 93 char *page) 94 { 95 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s" 96 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION, 97 utsname()->sysname, utsname()->machine); 98 } 99 100 CONFIGFS_ATTR_RO(target_core_item_, version); 101 102 char db_root[DB_ROOT_LEN] = DB_ROOT_DEFAULT; 103 static char db_root_stage[DB_ROOT_LEN]; 104 105 static ssize_t target_core_item_dbroot_show(struct config_item *item, 106 char *page) 107 { 108 return sprintf(page, "%s\n", db_root); 109 } 110 111 static ssize_t target_core_item_dbroot_store(struct config_item *item, 112 const char *page, size_t count) 113 { 114 ssize_t read_bytes; 115 struct file *fp; 116 117 mutex_lock(&g_tf_lock); 118 if (!list_empty(&g_tf_list)) { 119 mutex_unlock(&g_tf_lock); 120 pr_err("db_root: cannot be changed: target drivers registered"); 121 return -EINVAL; 122 } 123 124 if (count > (DB_ROOT_LEN - 1)) { 125 mutex_unlock(&g_tf_lock); 126 pr_err("db_root: count %d exceeds DB_ROOT_LEN-1: %u\n", 127 (int)count, DB_ROOT_LEN - 1); 128 return -EINVAL; 129 } 130 131 read_bytes = snprintf(db_root_stage, DB_ROOT_LEN, "%s", page); 132 if (!read_bytes) { 133 mutex_unlock(&g_tf_lock); 134 return -EINVAL; 135 } 136 if (db_root_stage[read_bytes - 1] == '\n') 137 db_root_stage[read_bytes - 1] = '\0'; 138 139 /* validate new db root before accepting it */ 140 fp = filp_open(db_root_stage, O_RDONLY, 0); 141 if (IS_ERR(fp)) { 142 mutex_unlock(&g_tf_lock); 143 pr_err("db_root: cannot open: %s\n", db_root_stage); 144 return -EINVAL; 145 } 146 if (!S_ISDIR(file_inode(fp)->i_mode)) { 147 filp_close(fp, NULL); 148 mutex_unlock(&g_tf_lock); 149 pr_err("db_root: not a directory: %s\n", db_root_stage); 150 return -EINVAL; 151 } 152 filp_close(fp, NULL); 153 154 strncpy(db_root, db_root_stage, read_bytes); 155 156 mutex_unlock(&g_tf_lock); 157 158 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); 159 160 return read_bytes; 161 } 162 163 CONFIGFS_ATTR(target_core_item_, dbroot); 164 165 static struct target_fabric_configfs *target_core_get_fabric( 166 const char *name) 167 { 168 struct target_fabric_configfs *tf; 169 170 if (!name) 171 return NULL; 172 173 mutex_lock(&g_tf_lock); 174 list_for_each_entry(tf, &g_tf_list, tf_list) { 175 const char *cmp_name = tf->tf_ops->fabric_alias; 176 if (!cmp_name) 177 cmp_name = tf->tf_ops->fabric_name; 178 if (!strcmp(cmp_name, name)) { 179 atomic_inc(&tf->tf_access_cnt); 180 mutex_unlock(&g_tf_lock); 181 return tf; 182 } 183 } 184 mutex_unlock(&g_tf_lock); 185 186 return NULL; 187 } 188 189 /* 190 * Called from struct target_core_group_ops->make_group() 191 */ 192 static struct config_group *target_core_register_fabric( 193 struct config_group *group, 194 const char *name) 195 { 196 struct target_fabric_configfs *tf; 197 int ret; 198 199 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:" 200 " %s\n", group, name); 201 202 tf = target_core_get_fabric(name); 203 if (!tf) { 204 pr_debug("target_core_register_fabric() trying autoload for %s\n", 205 name); 206 207 /* 208 * Below are some hardcoded request_module() calls to automatically 209 * local fabric modules when the following is called: 210 * 211 * mkdir -p /sys/kernel/config/target/$MODULE_NAME 212 * 213 * Note that this does not limit which TCM fabric module can be 214 * registered, but simply provids auto loading logic for modules with 215 * mkdir(2) system calls with known TCM fabric modules. 216 */ 217 218 if (!strncmp(name, "iscsi", 5)) { 219 /* 220 * Automatically load the LIO Target fabric module when the 221 * following is called: 222 * 223 * mkdir -p $CONFIGFS/target/iscsi 224 */ 225 ret = request_module("iscsi_target_mod"); 226 if (ret < 0) { 227 pr_debug("request_module() failed for" 228 " iscsi_target_mod.ko: %d\n", ret); 229 return ERR_PTR(-EINVAL); 230 } 231 } else if (!strncmp(name, "loopback", 8)) { 232 /* 233 * Automatically load the tcm_loop fabric module when the 234 * following is called: 235 * 236 * mkdir -p $CONFIGFS/target/loopback 237 */ 238 ret = request_module("tcm_loop"); 239 if (ret < 0) { 240 pr_debug("request_module() failed for" 241 " tcm_loop.ko: %d\n", ret); 242 return ERR_PTR(-EINVAL); 243 } 244 } 245 246 tf = target_core_get_fabric(name); 247 } 248 249 if (!tf) { 250 pr_debug("target_core_get_fabric() failed for %s\n", 251 name); 252 return ERR_PTR(-EINVAL); 253 } 254 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:" 255 " %s\n", tf->tf_ops->fabric_name); 256 /* 257 * On a successful target_core_get_fabric() look, the returned 258 * struct target_fabric_configfs *tf will contain a usage reference. 259 */ 260 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n", 261 &tf->tf_wwn_cit); 262 263 config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit); 264 265 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth", 266 &tf->tf_discovery_cit); 267 configfs_add_default_group(&tf->tf_disc_group, &tf->tf_group); 268 269 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric: %s\n", 270 config_item_name(&tf->tf_group.cg_item)); 271 return &tf->tf_group; 272 } 273 274 /* 275 * Called from struct target_core_group_ops->drop_item() 276 */ 277 static void target_core_deregister_fabric( 278 struct config_group *group, 279 struct config_item *item) 280 { 281 struct target_fabric_configfs *tf = container_of( 282 to_config_group(item), struct target_fabric_configfs, tf_group); 283 284 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in" 285 " tf list\n", config_item_name(item)); 286 287 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:" 288 " %s\n", tf->tf_ops->fabric_name); 289 atomic_dec(&tf->tf_access_cnt); 290 291 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci" 292 " %s\n", config_item_name(item)); 293 294 configfs_remove_default_groups(&tf->tf_group); 295 config_item_put(item); 296 } 297 298 static struct configfs_group_operations target_core_fabric_group_ops = { 299 .make_group = &target_core_register_fabric, 300 .drop_item = &target_core_deregister_fabric, 301 }; 302 303 /* 304 * All item attributes appearing in /sys/kernel/target/ appear here. 305 */ 306 static struct configfs_attribute *target_core_fabric_item_attrs[] = { 307 &target_core_item_attr_version, 308 &target_core_item_attr_dbroot, 309 NULL, 310 }; 311 312 /* 313 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/ 314 */ 315 static const struct config_item_type target_core_fabrics_item = { 316 .ct_group_ops = &target_core_fabric_group_ops, 317 .ct_attrs = target_core_fabric_item_attrs, 318 .ct_owner = THIS_MODULE, 319 }; 320 321 static struct configfs_subsystem target_core_fabrics = { 322 .su_group = { 323 .cg_item = { 324 .ci_namebuf = "target", 325 .ci_type = &target_core_fabrics_item, 326 }, 327 }, 328 }; 329 330 int target_depend_item(struct config_item *item) 331 { 332 return configfs_depend_item(&target_core_fabrics, item); 333 } 334 EXPORT_SYMBOL(target_depend_item); 335 336 void target_undepend_item(struct config_item *item) 337 { 338 return configfs_undepend_item(item); 339 } 340 EXPORT_SYMBOL(target_undepend_item); 341 342 /*############################################################################## 343 // Start functions called by external Target Fabrics Modules 344 //############################################################################*/ 345 346 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo) 347 { 348 if (tfo->fabric_alias) { 349 if (strlen(tfo->fabric_alias) >= TARGET_FABRIC_NAME_SIZE) { 350 pr_err("Passed alias: %s exceeds " 351 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_alias); 352 return -EINVAL; 353 } 354 } 355 if (!tfo->fabric_name) { 356 pr_err("Missing tfo->fabric_name\n"); 357 return -EINVAL; 358 } 359 if (strlen(tfo->fabric_name) >= TARGET_FABRIC_NAME_SIZE) { 360 pr_err("Passed name: %s exceeds " 361 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_name); 362 return -EINVAL; 363 } 364 if (!tfo->tpg_get_wwn) { 365 pr_err("Missing tfo->tpg_get_wwn()\n"); 366 return -EINVAL; 367 } 368 if (!tfo->tpg_get_tag) { 369 pr_err("Missing tfo->tpg_get_tag()\n"); 370 return -EINVAL; 371 } 372 if (!tfo->tpg_check_demo_mode) { 373 pr_err("Missing tfo->tpg_check_demo_mode()\n"); 374 return -EINVAL; 375 } 376 if (!tfo->tpg_check_demo_mode_cache) { 377 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n"); 378 return -EINVAL; 379 } 380 if (!tfo->tpg_check_demo_mode_write_protect) { 381 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n"); 382 return -EINVAL; 383 } 384 if (!tfo->tpg_check_prod_mode_write_protect) { 385 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n"); 386 return -EINVAL; 387 } 388 if (!tfo->tpg_get_inst_index) { 389 pr_err("Missing tfo->tpg_get_inst_index()\n"); 390 return -EINVAL; 391 } 392 if (!tfo->release_cmd) { 393 pr_err("Missing tfo->release_cmd()\n"); 394 return -EINVAL; 395 } 396 if (!tfo->sess_get_index) { 397 pr_err("Missing tfo->sess_get_index()\n"); 398 return -EINVAL; 399 } 400 if (!tfo->write_pending) { 401 pr_err("Missing tfo->write_pending()\n"); 402 return -EINVAL; 403 } 404 if (!tfo->write_pending_status) { 405 pr_err("Missing tfo->write_pending_status()\n"); 406 return -EINVAL; 407 } 408 if (!tfo->set_default_node_attributes) { 409 pr_err("Missing tfo->set_default_node_attributes()\n"); 410 return -EINVAL; 411 } 412 if (!tfo->get_cmd_state) { 413 pr_err("Missing tfo->get_cmd_state()\n"); 414 return -EINVAL; 415 } 416 if (!tfo->queue_data_in) { 417 pr_err("Missing tfo->queue_data_in()\n"); 418 return -EINVAL; 419 } 420 if (!tfo->queue_status) { 421 pr_err("Missing tfo->queue_status()\n"); 422 return -EINVAL; 423 } 424 if (!tfo->queue_tm_rsp) { 425 pr_err("Missing tfo->queue_tm_rsp()\n"); 426 return -EINVAL; 427 } 428 if (!tfo->aborted_task) { 429 pr_err("Missing tfo->aborted_task()\n"); 430 return -EINVAL; 431 } 432 if (!tfo->check_stop_free) { 433 pr_err("Missing tfo->check_stop_free()\n"); 434 return -EINVAL; 435 } 436 /* 437 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn() 438 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in 439 * target_core_fabric_configfs.c WWN+TPG group context code. 440 */ 441 if (!tfo->fabric_make_wwn) { 442 pr_err("Missing tfo->fabric_make_wwn()\n"); 443 return -EINVAL; 444 } 445 if (!tfo->fabric_drop_wwn) { 446 pr_err("Missing tfo->fabric_drop_wwn()\n"); 447 return -EINVAL; 448 } 449 if (!tfo->fabric_make_tpg) { 450 pr_err("Missing tfo->fabric_make_tpg()\n"); 451 return -EINVAL; 452 } 453 if (!tfo->fabric_drop_tpg) { 454 pr_err("Missing tfo->fabric_drop_tpg()\n"); 455 return -EINVAL; 456 } 457 458 return 0; 459 } 460 461 int target_register_template(const struct target_core_fabric_ops *fo) 462 { 463 struct target_fabric_configfs *tf; 464 int ret; 465 466 ret = target_fabric_tf_ops_check(fo); 467 if (ret) 468 return ret; 469 470 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL); 471 if (!tf) { 472 pr_err("%s: could not allocate memory!\n", __func__); 473 return -ENOMEM; 474 } 475 476 INIT_LIST_HEAD(&tf->tf_list); 477 atomic_set(&tf->tf_access_cnt, 0); 478 tf->tf_ops = fo; 479 target_fabric_setup_cits(tf); 480 481 mutex_lock(&g_tf_lock); 482 list_add_tail(&tf->tf_list, &g_tf_list); 483 mutex_unlock(&g_tf_lock); 484 485 return 0; 486 } 487 EXPORT_SYMBOL(target_register_template); 488 489 void target_unregister_template(const struct target_core_fabric_ops *fo) 490 { 491 struct target_fabric_configfs *t; 492 493 mutex_lock(&g_tf_lock); 494 list_for_each_entry(t, &g_tf_list, tf_list) { 495 if (!strcmp(t->tf_ops->fabric_name, fo->fabric_name)) { 496 BUG_ON(atomic_read(&t->tf_access_cnt)); 497 list_del(&t->tf_list); 498 mutex_unlock(&g_tf_lock); 499 /* 500 * Wait for any outstanding fabric se_deve_entry->rcu_head 501 * callbacks to complete post kfree_rcu(), before allowing 502 * fabric driver unload of TFO->module to proceed. 503 */ 504 rcu_barrier(); 505 kfree(t); 506 return; 507 } 508 } 509 mutex_unlock(&g_tf_lock); 510 } 511 EXPORT_SYMBOL(target_unregister_template); 512 513 /*############################################################################## 514 // Stop functions called by external Target Fabrics Modules 515 //############################################################################*/ 516 517 static inline struct se_dev_attrib *to_attrib(struct config_item *item) 518 { 519 return container_of(to_config_group(item), struct se_dev_attrib, 520 da_group); 521 } 522 523 /* Start functions for struct config_item_type tb_dev_attrib_cit */ 524 #define DEF_CONFIGFS_ATTRIB_SHOW(_name) \ 525 static ssize_t _name##_show(struct config_item *item, char *page) \ 526 { \ 527 return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \ 528 } 529 530 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias); 531 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo); 532 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write); 533 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read); 534 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache); 535 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl); 536 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas); 537 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu); 538 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws); 539 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw); 540 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc); 541 DEF_CONFIGFS_ATTRIB_SHOW(emulate_pr); 542 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type); 543 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type); 544 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify); 545 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids); 546 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot); 547 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord); 548 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl); 549 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size); 550 DEF_CONFIGFS_ATTRIB_SHOW(block_size); 551 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors); 552 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors); 553 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth); 554 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth); 555 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count); 556 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count); 557 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity); 558 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment); 559 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data); 560 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len); 561 562 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \ 563 static ssize_t _name##_store(struct config_item *item, const char *page,\ 564 size_t count) \ 565 { \ 566 struct se_dev_attrib *da = to_attrib(item); \ 567 u32 val; \ 568 int ret; \ 569 \ 570 ret = kstrtou32(page, 0, &val); \ 571 if (ret < 0) \ 572 return ret; \ 573 da->_name = val; \ 574 return count; \ 575 } 576 577 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count); 578 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count); 579 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity); 580 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment); 581 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len); 582 583 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \ 584 static ssize_t _name##_store(struct config_item *item, const char *page, \ 585 size_t count) \ 586 { \ 587 struct se_dev_attrib *da = to_attrib(item); \ 588 bool flag; \ 589 int ret; \ 590 \ 591 ret = strtobool(page, &flag); \ 592 if (ret < 0) \ 593 return ret; \ 594 da->_name = flag; \ 595 return count; \ 596 } 597 598 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write); 599 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw); 600 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc); 601 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr); 602 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids); 603 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot); 604 605 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \ 606 static ssize_t _name##_store(struct config_item *item, const char *page,\ 607 size_t count) \ 608 { \ 609 printk_once(KERN_WARNING \ 610 "ignoring deprecated %s attribute\n", \ 611 __stringify(_name)); \ 612 return count; \ 613 } 614 615 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo); 616 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read); 617 618 static void dev_set_t10_wwn_model_alias(struct se_device *dev) 619 { 620 const char *configname; 621 622 configname = config_item_name(&dev->dev_group.cg_item); 623 if (strlen(configname) >= INQUIRY_MODEL_LEN) { 624 pr_warn("dev[%p]: Backstore name '%s' is too long for " 625 "INQUIRY_MODEL, truncating to 15 characters\n", dev, 626 configname); 627 } 628 /* 629 * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1) 630 * here without potentially breaking existing setups, so continue to 631 * truncate one byte shorter than what can be carried in INQUIRY. 632 */ 633 strlcpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN); 634 } 635 636 static ssize_t emulate_model_alias_store(struct config_item *item, 637 const char *page, size_t count) 638 { 639 struct se_dev_attrib *da = to_attrib(item); 640 struct se_device *dev = da->da_dev; 641 bool flag; 642 int ret; 643 644 if (dev->export_count) { 645 pr_err("dev[%p]: Unable to change model alias" 646 " while export_count is %d\n", 647 dev, dev->export_count); 648 return -EINVAL; 649 } 650 651 ret = strtobool(page, &flag); 652 if (ret < 0) 653 return ret; 654 655 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); 656 if (flag) { 657 dev_set_t10_wwn_model_alias(dev); 658 } else { 659 strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod, 660 sizeof(dev->t10_wwn.model)); 661 } 662 da->emulate_model_alias = flag; 663 return count; 664 } 665 666 static ssize_t emulate_write_cache_store(struct config_item *item, 667 const char *page, size_t count) 668 { 669 struct se_dev_attrib *da = to_attrib(item); 670 bool flag; 671 int ret; 672 673 ret = strtobool(page, &flag); 674 if (ret < 0) 675 return ret; 676 677 if (flag && da->da_dev->transport->get_write_cache) { 678 pr_err("emulate_write_cache not supported for this device\n"); 679 return -EINVAL; 680 } 681 682 da->emulate_write_cache = flag; 683 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 684 da->da_dev, flag); 685 return count; 686 } 687 688 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item, 689 const char *page, size_t count) 690 { 691 struct se_dev_attrib *da = to_attrib(item); 692 u32 val; 693 int ret; 694 695 ret = kstrtou32(page, 0, &val); 696 if (ret < 0) 697 return ret; 698 699 if (val != 0 && val != 1 && val != 2) { 700 pr_err("Illegal value %d\n", val); 701 return -EINVAL; 702 } 703 704 if (da->da_dev->export_count) { 705 pr_err("dev[%p]: Unable to change SE Device" 706 " UA_INTRLCK_CTRL while export_count is %d\n", 707 da->da_dev, da->da_dev->export_count); 708 return -EINVAL; 709 } 710 da->emulate_ua_intlck_ctrl = val; 711 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 712 da->da_dev, val); 713 return count; 714 } 715 716 static ssize_t emulate_tas_store(struct config_item *item, 717 const char *page, size_t count) 718 { 719 struct se_dev_attrib *da = to_attrib(item); 720 bool flag; 721 int ret; 722 723 ret = strtobool(page, &flag); 724 if (ret < 0) 725 return ret; 726 727 if (da->da_dev->export_count) { 728 pr_err("dev[%p]: Unable to change SE Device TAS while" 729 " export_count is %d\n", 730 da->da_dev, da->da_dev->export_count); 731 return -EINVAL; 732 } 733 da->emulate_tas = flag; 734 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 735 da->da_dev, flag ? "Enabled" : "Disabled"); 736 737 return count; 738 } 739 740 static ssize_t emulate_tpu_store(struct config_item *item, 741 const char *page, size_t count) 742 { 743 struct se_dev_attrib *da = to_attrib(item); 744 bool flag; 745 int ret; 746 747 ret = strtobool(page, &flag); 748 if (ret < 0) 749 return ret; 750 751 /* 752 * We expect this value to be non-zero when generic Block Layer 753 * Discard supported is detected iblock_create_virtdevice(). 754 */ 755 if (flag && !da->max_unmap_block_desc_count) { 756 pr_err("Generic Block Discard not supported\n"); 757 return -ENOSYS; 758 } 759 760 da->emulate_tpu = flag; 761 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 762 da->da_dev, flag); 763 return count; 764 } 765 766 static ssize_t emulate_tpws_store(struct config_item *item, 767 const char *page, size_t count) 768 { 769 struct se_dev_attrib *da = to_attrib(item); 770 bool flag; 771 int ret; 772 773 ret = strtobool(page, &flag); 774 if (ret < 0) 775 return ret; 776 777 /* 778 * We expect this value to be non-zero when generic Block Layer 779 * Discard supported is detected iblock_create_virtdevice(). 780 */ 781 if (flag && !da->max_unmap_block_desc_count) { 782 pr_err("Generic Block Discard not supported\n"); 783 return -ENOSYS; 784 } 785 786 da->emulate_tpws = flag; 787 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 788 da->da_dev, flag); 789 return count; 790 } 791 792 static ssize_t pi_prot_type_store(struct config_item *item, 793 const char *page, size_t count) 794 { 795 struct se_dev_attrib *da = to_attrib(item); 796 int old_prot = da->pi_prot_type, ret; 797 struct se_device *dev = da->da_dev; 798 u32 flag; 799 800 ret = kstrtou32(page, 0, &flag); 801 if (ret < 0) 802 return ret; 803 804 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) { 805 pr_err("Illegal value %d for pi_prot_type\n", flag); 806 return -EINVAL; 807 } 808 if (flag == 2) { 809 pr_err("DIF TYPE2 protection currently not supported\n"); 810 return -ENOSYS; 811 } 812 if (da->hw_pi_prot_type) { 813 pr_warn("DIF protection enabled on underlying hardware," 814 " ignoring\n"); 815 return count; 816 } 817 if (!dev->transport->init_prot || !dev->transport->free_prot) { 818 /* 0 is only allowed value for non-supporting backends */ 819 if (flag == 0) 820 return count; 821 822 pr_err("DIF protection not supported by backend: %s\n", 823 dev->transport->name); 824 return -ENOSYS; 825 } 826 if (!target_dev_configured(dev)) { 827 pr_err("DIF protection requires device to be configured\n"); 828 return -ENODEV; 829 } 830 if (dev->export_count) { 831 pr_err("dev[%p]: Unable to change SE Device PROT type while" 832 " export_count is %d\n", dev, dev->export_count); 833 return -EINVAL; 834 } 835 836 da->pi_prot_type = flag; 837 838 if (flag && !old_prot) { 839 ret = dev->transport->init_prot(dev); 840 if (ret) { 841 da->pi_prot_type = old_prot; 842 da->pi_prot_verify = (bool) da->pi_prot_type; 843 return ret; 844 } 845 846 } else if (!flag && old_prot) { 847 dev->transport->free_prot(dev); 848 } 849 850 da->pi_prot_verify = (bool) da->pi_prot_type; 851 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag); 852 return count; 853 } 854 855 /* always zero, but attr needs to remain RW to avoid userspace breakage */ 856 static ssize_t pi_prot_format_show(struct config_item *item, char *page) 857 { 858 return snprintf(page, PAGE_SIZE, "0\n"); 859 } 860 861 static ssize_t pi_prot_format_store(struct config_item *item, 862 const char *page, size_t count) 863 { 864 struct se_dev_attrib *da = to_attrib(item); 865 struct se_device *dev = da->da_dev; 866 bool flag; 867 int ret; 868 869 ret = strtobool(page, &flag); 870 if (ret < 0) 871 return ret; 872 873 if (!flag) 874 return count; 875 876 if (!dev->transport->format_prot) { 877 pr_err("DIF protection format not supported by backend %s\n", 878 dev->transport->name); 879 return -ENOSYS; 880 } 881 if (!target_dev_configured(dev)) { 882 pr_err("DIF protection format requires device to be configured\n"); 883 return -ENODEV; 884 } 885 if (dev->export_count) { 886 pr_err("dev[%p]: Unable to format SE Device PROT type while" 887 " export_count is %d\n", dev, dev->export_count); 888 return -EINVAL; 889 } 890 891 ret = dev->transport->format_prot(dev); 892 if (ret) 893 return ret; 894 895 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev); 896 return count; 897 } 898 899 static ssize_t pi_prot_verify_store(struct config_item *item, 900 const char *page, size_t count) 901 { 902 struct se_dev_attrib *da = to_attrib(item); 903 bool flag; 904 int ret; 905 906 ret = strtobool(page, &flag); 907 if (ret < 0) 908 return ret; 909 910 if (!flag) { 911 da->pi_prot_verify = flag; 912 return count; 913 } 914 if (da->hw_pi_prot_type) { 915 pr_warn("DIF protection enabled on underlying hardware," 916 " ignoring\n"); 917 return count; 918 } 919 if (!da->pi_prot_type) { 920 pr_warn("DIF protection not supported by backend, ignoring\n"); 921 return count; 922 } 923 da->pi_prot_verify = flag; 924 925 return count; 926 } 927 928 static ssize_t force_pr_aptpl_store(struct config_item *item, 929 const char *page, size_t count) 930 { 931 struct se_dev_attrib *da = to_attrib(item); 932 bool flag; 933 int ret; 934 935 ret = strtobool(page, &flag); 936 if (ret < 0) 937 return ret; 938 if (da->da_dev->export_count) { 939 pr_err("dev[%p]: Unable to set force_pr_aptpl while" 940 " export_count is %d\n", 941 da->da_dev, da->da_dev->export_count); 942 return -EINVAL; 943 } 944 945 da->force_pr_aptpl = flag; 946 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag); 947 return count; 948 } 949 950 static ssize_t emulate_rest_reord_store(struct config_item *item, 951 const char *page, size_t count) 952 { 953 struct se_dev_attrib *da = to_attrib(item); 954 bool flag; 955 int ret; 956 957 ret = strtobool(page, &flag); 958 if (ret < 0) 959 return ret; 960 961 if (flag != 0) { 962 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted" 963 " reordering not implemented\n", da->da_dev); 964 return -ENOSYS; 965 } 966 da->emulate_rest_reord = flag; 967 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", 968 da->da_dev, flag); 969 return count; 970 } 971 972 static ssize_t unmap_zeroes_data_store(struct config_item *item, 973 const char *page, size_t count) 974 { 975 struct se_dev_attrib *da = to_attrib(item); 976 bool flag; 977 int ret; 978 979 ret = strtobool(page, &flag); 980 if (ret < 0) 981 return ret; 982 983 if (da->da_dev->export_count) { 984 pr_err("dev[%p]: Unable to change SE Device" 985 " unmap_zeroes_data while export_count is %d\n", 986 da->da_dev, da->da_dev->export_count); 987 return -EINVAL; 988 } 989 /* 990 * We expect this value to be non-zero when generic Block Layer 991 * Discard supported is detected iblock_configure_device(). 992 */ 993 if (flag && !da->max_unmap_block_desc_count) { 994 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set" 995 " because max_unmap_block_desc_count is zero\n", 996 da->da_dev); 997 return -ENOSYS; 998 } 999 da->unmap_zeroes_data = flag; 1000 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n", 1001 da->da_dev, flag); 1002 return count; 1003 } 1004 1005 /* 1006 * Note, this can only be called on unexported SE Device Object. 1007 */ 1008 static ssize_t queue_depth_store(struct config_item *item, 1009 const char *page, size_t count) 1010 { 1011 struct se_dev_attrib *da = to_attrib(item); 1012 struct se_device *dev = da->da_dev; 1013 u32 val; 1014 int ret; 1015 1016 ret = kstrtou32(page, 0, &val); 1017 if (ret < 0) 1018 return ret; 1019 1020 if (dev->export_count) { 1021 pr_err("dev[%p]: Unable to change SE Device TCQ while" 1022 " export_count is %d\n", 1023 dev, dev->export_count); 1024 return -EINVAL; 1025 } 1026 if (!val) { 1027 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev); 1028 return -EINVAL; 1029 } 1030 1031 if (val > dev->dev_attrib.queue_depth) { 1032 if (val > dev->dev_attrib.hw_queue_depth) { 1033 pr_err("dev[%p]: Passed queue_depth:" 1034 " %u exceeds TCM/SE_Device MAX" 1035 " TCQ: %u\n", dev, val, 1036 dev->dev_attrib.hw_queue_depth); 1037 return -EINVAL; 1038 } 1039 } 1040 da->queue_depth = dev->queue_depth = val; 1041 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val); 1042 return count; 1043 } 1044 1045 static ssize_t optimal_sectors_store(struct config_item *item, 1046 const char *page, size_t count) 1047 { 1048 struct se_dev_attrib *da = to_attrib(item); 1049 u32 val; 1050 int ret; 1051 1052 ret = kstrtou32(page, 0, &val); 1053 if (ret < 0) 1054 return ret; 1055 1056 if (da->da_dev->export_count) { 1057 pr_err("dev[%p]: Unable to change SE Device" 1058 " optimal_sectors while export_count is %d\n", 1059 da->da_dev, da->da_dev->export_count); 1060 return -EINVAL; 1061 } 1062 if (val > da->hw_max_sectors) { 1063 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1064 " greater than hw_max_sectors: %u\n", 1065 da->da_dev, val, da->hw_max_sectors); 1066 return -EINVAL; 1067 } 1068 1069 da->optimal_sectors = val; 1070 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1071 da->da_dev, val); 1072 return count; 1073 } 1074 1075 static ssize_t block_size_store(struct config_item *item, 1076 const char *page, size_t count) 1077 { 1078 struct se_dev_attrib *da = to_attrib(item); 1079 u32 val; 1080 int ret; 1081 1082 ret = kstrtou32(page, 0, &val); 1083 if (ret < 0) 1084 return ret; 1085 1086 if (da->da_dev->export_count) { 1087 pr_err("dev[%p]: Unable to change SE Device block_size" 1088 " while export_count is %d\n", 1089 da->da_dev, da->da_dev->export_count); 1090 return -EINVAL; 1091 } 1092 1093 if (val != 512 && val != 1024 && val != 2048 && val != 4096) { 1094 pr_err("dev[%p]: Illegal value for block_device: %u" 1095 " for SE device, must be 512, 1024, 2048 or 4096\n", 1096 da->da_dev, val); 1097 return -EINVAL; 1098 } 1099 1100 da->block_size = val; 1101 if (da->max_bytes_per_io) 1102 da->hw_max_sectors = da->max_bytes_per_io / val; 1103 1104 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1105 da->da_dev, val); 1106 return count; 1107 } 1108 1109 static ssize_t alua_support_show(struct config_item *item, char *page) 1110 { 1111 struct se_dev_attrib *da = to_attrib(item); 1112 u8 flags = da->da_dev->transport->transport_flags; 1113 1114 return snprintf(page, PAGE_SIZE, "%d\n", 1115 flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1); 1116 } 1117 1118 static ssize_t pgr_support_show(struct config_item *item, char *page) 1119 { 1120 struct se_dev_attrib *da = to_attrib(item); 1121 u8 flags = da->da_dev->transport->transport_flags; 1122 1123 return snprintf(page, PAGE_SIZE, "%d\n", 1124 flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1); 1125 } 1126 1127 CONFIGFS_ATTR(, emulate_model_alias); 1128 CONFIGFS_ATTR(, emulate_dpo); 1129 CONFIGFS_ATTR(, emulate_fua_write); 1130 CONFIGFS_ATTR(, emulate_fua_read); 1131 CONFIGFS_ATTR(, emulate_write_cache); 1132 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl); 1133 CONFIGFS_ATTR(, emulate_tas); 1134 CONFIGFS_ATTR(, emulate_tpu); 1135 CONFIGFS_ATTR(, emulate_tpws); 1136 CONFIGFS_ATTR(, emulate_caw); 1137 CONFIGFS_ATTR(, emulate_3pc); 1138 CONFIGFS_ATTR(, emulate_pr); 1139 CONFIGFS_ATTR(, pi_prot_type); 1140 CONFIGFS_ATTR_RO(, hw_pi_prot_type); 1141 CONFIGFS_ATTR(, pi_prot_format); 1142 CONFIGFS_ATTR(, pi_prot_verify); 1143 CONFIGFS_ATTR(, enforce_pr_isids); 1144 CONFIGFS_ATTR(, is_nonrot); 1145 CONFIGFS_ATTR(, emulate_rest_reord); 1146 CONFIGFS_ATTR(, force_pr_aptpl); 1147 CONFIGFS_ATTR_RO(, hw_block_size); 1148 CONFIGFS_ATTR(, block_size); 1149 CONFIGFS_ATTR_RO(, hw_max_sectors); 1150 CONFIGFS_ATTR(, optimal_sectors); 1151 CONFIGFS_ATTR_RO(, hw_queue_depth); 1152 CONFIGFS_ATTR(, queue_depth); 1153 CONFIGFS_ATTR(, max_unmap_lba_count); 1154 CONFIGFS_ATTR(, max_unmap_block_desc_count); 1155 CONFIGFS_ATTR(, unmap_granularity); 1156 CONFIGFS_ATTR(, unmap_granularity_alignment); 1157 CONFIGFS_ATTR(, unmap_zeroes_data); 1158 CONFIGFS_ATTR(, max_write_same_len); 1159 CONFIGFS_ATTR_RO(, alua_support); 1160 CONFIGFS_ATTR_RO(, pgr_support); 1161 1162 /* 1163 * dev_attrib attributes for devices using the target core SBC/SPC 1164 * interpreter. Any backend using spc_parse_cdb should be using 1165 * these. 1166 */ 1167 struct configfs_attribute *sbc_attrib_attrs[] = { 1168 &attr_emulate_model_alias, 1169 &attr_emulate_dpo, 1170 &attr_emulate_fua_write, 1171 &attr_emulate_fua_read, 1172 &attr_emulate_write_cache, 1173 &attr_emulate_ua_intlck_ctrl, 1174 &attr_emulate_tas, 1175 &attr_emulate_tpu, 1176 &attr_emulate_tpws, 1177 &attr_emulate_caw, 1178 &attr_emulate_3pc, 1179 &attr_emulate_pr, 1180 &attr_pi_prot_type, 1181 &attr_hw_pi_prot_type, 1182 &attr_pi_prot_format, 1183 &attr_pi_prot_verify, 1184 &attr_enforce_pr_isids, 1185 &attr_is_nonrot, 1186 &attr_emulate_rest_reord, 1187 &attr_force_pr_aptpl, 1188 &attr_hw_block_size, 1189 &attr_block_size, 1190 &attr_hw_max_sectors, 1191 &attr_optimal_sectors, 1192 &attr_hw_queue_depth, 1193 &attr_queue_depth, 1194 &attr_max_unmap_lba_count, 1195 &attr_max_unmap_block_desc_count, 1196 &attr_unmap_granularity, 1197 &attr_unmap_granularity_alignment, 1198 &attr_unmap_zeroes_data, 1199 &attr_max_write_same_len, 1200 &attr_alua_support, 1201 &attr_pgr_support, 1202 NULL, 1203 }; 1204 EXPORT_SYMBOL(sbc_attrib_attrs); 1205 1206 /* 1207 * Minimal dev_attrib attributes for devices passing through CDBs. 1208 * In this case we only provide a few read-only attributes for 1209 * backwards compatibility. 1210 */ 1211 struct configfs_attribute *passthrough_attrib_attrs[] = { 1212 &attr_hw_pi_prot_type, 1213 &attr_hw_block_size, 1214 &attr_hw_max_sectors, 1215 &attr_hw_queue_depth, 1216 &attr_alua_support, 1217 &attr_pgr_support, 1218 NULL, 1219 }; 1220 EXPORT_SYMBOL(passthrough_attrib_attrs); 1221 1222 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL); 1223 TB_CIT_SETUP_DRV(dev_action, NULL, NULL); 1224 1225 /* End functions for struct config_item_type tb_dev_attrib_cit */ 1226 1227 /* Start functions for struct config_item_type tb_dev_wwn_cit */ 1228 1229 static struct t10_wwn *to_t10_wwn(struct config_item *item) 1230 { 1231 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group); 1232 } 1233 1234 /* 1235 * STANDARD and VPD page 0x83 T10 Vendor Identification 1236 */ 1237 static ssize_t target_wwn_vendor_id_show(struct config_item *item, 1238 char *page) 1239 { 1240 return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]); 1241 } 1242 1243 static ssize_t target_wwn_vendor_id_store(struct config_item *item, 1244 const char *page, size_t count) 1245 { 1246 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1247 struct se_device *dev = t10_wwn->t10_dev; 1248 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1249 unsigned char buf[INQUIRY_VENDOR_LEN + 2]; 1250 char *stripped = NULL; 1251 size_t len; 1252 int i; 1253 1254 len = strlcpy(buf, page, sizeof(buf)); 1255 if (len < sizeof(buf)) { 1256 /* Strip any newline added from userspace. */ 1257 stripped = strstrip(buf); 1258 len = strlen(stripped); 1259 } 1260 if (len > INQUIRY_VENDOR_LEN) { 1261 pr_err("Emulated T10 Vendor Identification exceeds" 1262 " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN) 1263 "\n"); 1264 return -EOVERFLOW; 1265 } 1266 1267 /* 1268 * SPC 4.3.1: 1269 * ASCII data fields shall contain only ASCII printable characters (i.e., 1270 * code values 20h to 7Eh) and may be terminated with one or more ASCII 1271 * null (00h) characters. 1272 */ 1273 for (i = 0; i < len; i++) { 1274 if ((stripped[i] < 0x20) || (stripped[i] > 0x7E)) { 1275 pr_err("Emulated T10 Vendor Identification contains" 1276 " non-ASCII-printable characters\n"); 1277 return -EINVAL; 1278 } 1279 } 1280 1281 /* 1282 * Check to see if any active exports exist. If they do exist, fail 1283 * here as changing this information on the fly (underneath the 1284 * initiator side OS dependent multipath code) could cause negative 1285 * effects. 1286 */ 1287 if (dev->export_count) { 1288 pr_err("Unable to set T10 Vendor Identification while" 1289 " active %d exports exist\n", dev->export_count); 1290 return -EINVAL; 1291 } 1292 1293 BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1); 1294 strlcpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor)); 1295 1296 pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:" 1297 " %s\n", dev->t10_wwn.vendor); 1298 1299 return count; 1300 } 1301 1302 /* 1303 * VPD page 0x80 Unit serial 1304 */ 1305 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item, 1306 char *page) 1307 { 1308 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 1309 &to_t10_wwn(item)->unit_serial[0]); 1310 } 1311 1312 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item, 1313 const char *page, size_t count) 1314 { 1315 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1316 struct se_device *dev = t10_wwn->t10_dev; 1317 unsigned char buf[INQUIRY_VPD_SERIAL_LEN]; 1318 1319 /* 1320 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 1321 * from the struct scsi_device level firmware, do not allow 1322 * VPD Unit Serial to be emulated. 1323 * 1324 * Note this struct scsi_device could also be emulating VPD 1325 * information from its drivers/scsi LLD. But for now we assume 1326 * it is doing 'the right thing' wrt a world wide unique 1327 * VPD Unit Serial Number that OS dependent multipath can depend on. 1328 */ 1329 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) { 1330 pr_err("Underlying SCSI device firmware provided VPD" 1331 " Unit Serial, ignoring request\n"); 1332 return -EOPNOTSUPP; 1333 } 1334 1335 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 1336 pr_err("Emulated VPD Unit Serial exceeds" 1337 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 1338 return -EOVERFLOW; 1339 } 1340 /* 1341 * Check to see if any active $FABRIC_MOD exports exist. If they 1342 * do exist, fail here as changing this information on the fly 1343 * (underneath the initiator side OS dependent multipath code) 1344 * could cause negative effects. 1345 */ 1346 if (dev->export_count) { 1347 pr_err("Unable to set VPD Unit Serial while" 1348 " active %d $FABRIC_MOD exports exist\n", 1349 dev->export_count); 1350 return -EINVAL; 1351 } 1352 1353 /* 1354 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 1355 * 1356 * Also, strip any newline added from the userspace 1357 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 1358 */ 1359 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN); 1360 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 1361 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 1362 "%s", strstrip(buf)); 1363 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL; 1364 1365 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 1366 " %s\n", dev->t10_wwn.unit_serial); 1367 1368 return count; 1369 } 1370 1371 /* 1372 * VPD page 0x83 Protocol Identifier 1373 */ 1374 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item, 1375 char *page) 1376 { 1377 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1378 struct t10_vpd *vpd; 1379 unsigned char buf[VPD_TMP_BUF_SIZE]; 1380 ssize_t len = 0; 1381 1382 memset(buf, 0, VPD_TMP_BUF_SIZE); 1383 1384 spin_lock(&t10_wwn->t10_vpd_lock); 1385 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 1386 if (!vpd->protocol_identifier_set) 1387 continue; 1388 1389 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 1390 1391 if (len + strlen(buf) >= PAGE_SIZE) 1392 break; 1393 1394 len += sprintf(page+len, "%s", buf); 1395 } 1396 spin_unlock(&t10_wwn->t10_vpd_lock); 1397 1398 return len; 1399 } 1400 1401 /* 1402 * Generic wrapper for dumping VPD identifiers by association. 1403 */ 1404 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 1405 static ssize_t target_wwn_##_name##_show(struct config_item *item, \ 1406 char *page) \ 1407 { \ 1408 struct t10_wwn *t10_wwn = to_t10_wwn(item); \ 1409 struct t10_vpd *vpd; \ 1410 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 1411 ssize_t len = 0; \ 1412 \ 1413 spin_lock(&t10_wwn->t10_vpd_lock); \ 1414 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 1415 if (vpd->association != _assoc) \ 1416 continue; \ 1417 \ 1418 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1419 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 1420 if (len + strlen(buf) >= PAGE_SIZE) \ 1421 break; \ 1422 len += sprintf(page+len, "%s", buf); \ 1423 \ 1424 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1425 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 1426 if (len + strlen(buf) >= PAGE_SIZE) \ 1427 break; \ 1428 len += sprintf(page+len, "%s", buf); \ 1429 \ 1430 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1431 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 1432 if (len + strlen(buf) >= PAGE_SIZE) \ 1433 break; \ 1434 len += sprintf(page+len, "%s", buf); \ 1435 } \ 1436 spin_unlock(&t10_wwn->t10_vpd_lock); \ 1437 \ 1438 return len; \ 1439 } 1440 1441 /* VPD page 0x83 Association: Logical Unit */ 1442 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 1443 /* VPD page 0x83 Association: Target Port */ 1444 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 1445 /* VPD page 0x83 Association: SCSI Target Device */ 1446 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 1447 1448 CONFIGFS_ATTR(target_wwn_, vendor_id); 1449 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial); 1450 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier); 1451 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit); 1452 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port); 1453 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device); 1454 1455 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 1456 &target_wwn_attr_vendor_id, 1457 &target_wwn_attr_vpd_unit_serial, 1458 &target_wwn_attr_vpd_protocol_identifier, 1459 &target_wwn_attr_vpd_assoc_logical_unit, 1460 &target_wwn_attr_vpd_assoc_target_port, 1461 &target_wwn_attr_vpd_assoc_scsi_target_device, 1462 NULL, 1463 }; 1464 1465 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs); 1466 1467 /* End functions for struct config_item_type tb_dev_wwn_cit */ 1468 1469 /* Start functions for struct config_item_type tb_dev_pr_cit */ 1470 1471 static struct se_device *pr_to_dev(struct config_item *item) 1472 { 1473 return container_of(to_config_group(item), struct se_device, 1474 dev_pr_group); 1475 } 1476 1477 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev, 1478 char *page) 1479 { 1480 struct se_node_acl *se_nacl; 1481 struct t10_pr_registration *pr_reg; 1482 char i_buf[PR_REG_ISID_ID_LEN]; 1483 1484 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1485 1486 pr_reg = dev->dev_pr_res_holder; 1487 if (!pr_reg) 1488 return sprintf(page, "No SPC-3 Reservation holder\n"); 1489 1490 se_nacl = pr_reg->pr_reg_nacl; 1491 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1492 1493 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", 1494 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1495 se_nacl->initiatorname, i_buf); 1496 } 1497 1498 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, 1499 char *page) 1500 { 1501 struct se_node_acl *se_nacl; 1502 ssize_t len; 1503 1504 se_nacl = dev->dev_reserved_node_acl; 1505 if (se_nacl) { 1506 len = sprintf(page, 1507 "SPC-2 Reservation: %s Initiator: %s\n", 1508 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1509 se_nacl->initiatorname); 1510 } else { 1511 len = sprintf(page, "No SPC-2 Reservation holder\n"); 1512 } 1513 return len; 1514 } 1515 1516 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page) 1517 { 1518 struct se_device *dev = pr_to_dev(item); 1519 int ret; 1520 1521 if (!dev->dev_attrib.emulate_pr) 1522 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 1523 1524 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1525 return sprintf(page, "Passthrough\n"); 1526 1527 spin_lock(&dev->dev_reservation_lock); 1528 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1529 ret = target_core_dev_pr_show_spc2_res(dev, page); 1530 else 1531 ret = target_core_dev_pr_show_spc3_res(dev, page); 1532 spin_unlock(&dev->dev_reservation_lock); 1533 return ret; 1534 } 1535 1536 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item, 1537 char *page) 1538 { 1539 struct se_device *dev = pr_to_dev(item); 1540 ssize_t len = 0; 1541 1542 spin_lock(&dev->dev_reservation_lock); 1543 if (!dev->dev_pr_res_holder) { 1544 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1545 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { 1546 len = sprintf(page, "SPC-3 Reservation: All Target" 1547 " Ports registration\n"); 1548 } else { 1549 len = sprintf(page, "SPC-3 Reservation: Single" 1550 " Target Port registration\n"); 1551 } 1552 1553 spin_unlock(&dev->dev_reservation_lock); 1554 return len; 1555 } 1556 1557 static ssize_t target_pr_res_pr_generation_show(struct config_item *item, 1558 char *page) 1559 { 1560 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation); 1561 } 1562 1563 1564 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item, 1565 char *page) 1566 { 1567 struct se_device *dev = pr_to_dev(item); 1568 struct se_node_acl *se_nacl; 1569 struct se_portal_group *se_tpg; 1570 struct t10_pr_registration *pr_reg; 1571 const struct target_core_fabric_ops *tfo; 1572 ssize_t len = 0; 1573 1574 spin_lock(&dev->dev_reservation_lock); 1575 pr_reg = dev->dev_pr_res_holder; 1576 if (!pr_reg) { 1577 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1578 goto out_unlock; 1579 } 1580 1581 se_nacl = pr_reg->pr_reg_nacl; 1582 se_tpg = se_nacl->se_tpg; 1583 tfo = se_tpg->se_tpg_tfo; 1584 1585 len += sprintf(page+len, "SPC-3 Reservation: %s" 1586 " Target Node Endpoint: %s\n", tfo->fabric_name, 1587 tfo->tpg_get_wwn(se_tpg)); 1588 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1589 " Identifier Tag: %hu %s Portal Group Tag: %hu" 1590 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi, 1591 tfo->fabric_name, tfo->tpg_get_tag(se_tpg), 1592 tfo->fabric_name, pr_reg->pr_aptpl_target_lun); 1593 1594 out_unlock: 1595 spin_unlock(&dev->dev_reservation_lock); 1596 return len; 1597 } 1598 1599 1600 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item, 1601 char *page) 1602 { 1603 struct se_device *dev = pr_to_dev(item); 1604 const struct target_core_fabric_ops *tfo; 1605 struct t10_pr_registration *pr_reg; 1606 unsigned char buf[384]; 1607 char i_buf[PR_REG_ISID_ID_LEN]; 1608 ssize_t len = 0; 1609 int reg_count = 0; 1610 1611 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1612 1613 spin_lock(&dev->t10_pr.registration_lock); 1614 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1615 pr_reg_list) { 1616 1617 memset(buf, 0, 384); 1618 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1619 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1620 core_pr_dump_initiator_port(pr_reg, i_buf, 1621 PR_REG_ISID_ID_LEN); 1622 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1623 tfo->fabric_name, 1624 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, 1625 pr_reg->pr_res_generation); 1626 1627 if (len + strlen(buf) >= PAGE_SIZE) 1628 break; 1629 1630 len += sprintf(page+len, "%s", buf); 1631 reg_count++; 1632 } 1633 spin_unlock(&dev->t10_pr.registration_lock); 1634 1635 if (!reg_count) 1636 len += sprintf(page+len, "None\n"); 1637 1638 return len; 1639 } 1640 1641 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page) 1642 { 1643 struct se_device *dev = pr_to_dev(item); 1644 struct t10_pr_registration *pr_reg; 1645 ssize_t len = 0; 1646 1647 spin_lock(&dev->dev_reservation_lock); 1648 pr_reg = dev->dev_pr_res_holder; 1649 if (pr_reg) { 1650 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1651 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 1652 } else { 1653 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1654 } 1655 1656 spin_unlock(&dev->dev_reservation_lock); 1657 return len; 1658 } 1659 1660 static ssize_t target_pr_res_type_show(struct config_item *item, char *page) 1661 { 1662 struct se_device *dev = pr_to_dev(item); 1663 1664 if (!dev->dev_attrib.emulate_pr) 1665 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 1666 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1667 return sprintf(page, "SPC_PASSTHROUGH\n"); 1668 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1669 return sprintf(page, "SPC2_RESERVATIONS\n"); 1670 1671 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 1672 } 1673 1674 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item, 1675 char *page) 1676 { 1677 struct se_device *dev = pr_to_dev(item); 1678 1679 if (!dev->dev_attrib.emulate_pr || 1680 (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 1681 return 0; 1682 1683 return sprintf(page, "APTPL Bit Status: %s\n", 1684 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 1685 } 1686 1687 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item, 1688 char *page) 1689 { 1690 struct se_device *dev = pr_to_dev(item); 1691 1692 if (!dev->dev_attrib.emulate_pr || 1693 (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 1694 return 0; 1695 1696 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 1697 } 1698 1699 enum { 1700 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 1701 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 1702 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 1703 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 1704 }; 1705 1706 static match_table_t tokens = { 1707 {Opt_initiator_fabric, "initiator_fabric=%s"}, 1708 {Opt_initiator_node, "initiator_node=%s"}, 1709 {Opt_initiator_sid, "initiator_sid=%s"}, 1710 {Opt_sa_res_key, "sa_res_key=%s"}, 1711 {Opt_res_holder, "res_holder=%d"}, 1712 {Opt_res_type, "res_type=%d"}, 1713 {Opt_res_scope, "res_scope=%d"}, 1714 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 1715 {Opt_mapped_lun, "mapped_lun=%u"}, 1716 {Opt_target_fabric, "target_fabric=%s"}, 1717 {Opt_target_node, "target_node=%s"}, 1718 {Opt_tpgt, "tpgt=%d"}, 1719 {Opt_port_rtpi, "port_rtpi=%d"}, 1720 {Opt_target_lun, "target_lun=%u"}, 1721 {Opt_err, NULL} 1722 }; 1723 1724 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item, 1725 const char *page, size_t count) 1726 { 1727 struct se_device *dev = pr_to_dev(item); 1728 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 1729 unsigned char *t_fabric = NULL, *t_port = NULL; 1730 char *orig, *ptr, *opts; 1731 substring_t args[MAX_OPT_ARGS]; 1732 unsigned long long tmp_ll; 1733 u64 sa_res_key = 0; 1734 u64 mapped_lun = 0, target_lun = 0; 1735 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 1736 u16 tpgt = 0; 1737 u8 type = 0; 1738 1739 if (!dev->dev_attrib.emulate_pr || 1740 (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 1741 return count; 1742 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1743 return count; 1744 1745 if (dev->export_count) { 1746 pr_debug("Unable to process APTPL metadata while" 1747 " active fabric exports exist\n"); 1748 return -EINVAL; 1749 } 1750 1751 opts = kstrdup(page, GFP_KERNEL); 1752 if (!opts) 1753 return -ENOMEM; 1754 1755 orig = opts; 1756 while ((ptr = strsep(&opts, ",\n")) != NULL) { 1757 if (!*ptr) 1758 continue; 1759 1760 token = match_token(ptr, tokens, args); 1761 switch (token) { 1762 case Opt_initiator_fabric: 1763 i_fabric = match_strdup(args); 1764 if (!i_fabric) { 1765 ret = -ENOMEM; 1766 goto out; 1767 } 1768 break; 1769 case Opt_initiator_node: 1770 i_port = match_strdup(args); 1771 if (!i_port) { 1772 ret = -ENOMEM; 1773 goto out; 1774 } 1775 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 1776 pr_err("APTPL metadata initiator_node=" 1777 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 1778 PR_APTPL_MAX_IPORT_LEN); 1779 ret = -EINVAL; 1780 break; 1781 } 1782 break; 1783 case Opt_initiator_sid: 1784 isid = match_strdup(args); 1785 if (!isid) { 1786 ret = -ENOMEM; 1787 goto out; 1788 } 1789 if (strlen(isid) >= PR_REG_ISID_LEN) { 1790 pr_err("APTPL metadata initiator_isid" 1791 "= exceeds PR_REG_ISID_LEN: %d\n", 1792 PR_REG_ISID_LEN); 1793 ret = -EINVAL; 1794 break; 1795 } 1796 break; 1797 case Opt_sa_res_key: 1798 ret = match_u64(args, &tmp_ll); 1799 if (ret < 0) { 1800 pr_err("kstrtoull() failed for sa_res_key=\n"); 1801 goto out; 1802 } 1803 sa_res_key = (u64)tmp_ll; 1804 break; 1805 /* 1806 * PR APTPL Metadata for Reservation 1807 */ 1808 case Opt_res_holder: 1809 ret = match_int(args, &arg); 1810 if (ret) 1811 goto out; 1812 res_holder = arg; 1813 break; 1814 case Opt_res_type: 1815 ret = match_int(args, &arg); 1816 if (ret) 1817 goto out; 1818 type = (u8)arg; 1819 break; 1820 case Opt_res_scope: 1821 ret = match_int(args, &arg); 1822 if (ret) 1823 goto out; 1824 break; 1825 case Opt_res_all_tg_pt: 1826 ret = match_int(args, &arg); 1827 if (ret) 1828 goto out; 1829 all_tg_pt = (int)arg; 1830 break; 1831 case Opt_mapped_lun: 1832 ret = match_u64(args, &tmp_ll); 1833 if (ret) 1834 goto out; 1835 mapped_lun = (u64)tmp_ll; 1836 break; 1837 /* 1838 * PR APTPL Metadata for Target Port 1839 */ 1840 case Opt_target_fabric: 1841 t_fabric = match_strdup(args); 1842 if (!t_fabric) { 1843 ret = -ENOMEM; 1844 goto out; 1845 } 1846 break; 1847 case Opt_target_node: 1848 t_port = match_strdup(args); 1849 if (!t_port) { 1850 ret = -ENOMEM; 1851 goto out; 1852 } 1853 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 1854 pr_err("APTPL metadata target_node=" 1855 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 1856 PR_APTPL_MAX_TPORT_LEN); 1857 ret = -EINVAL; 1858 break; 1859 } 1860 break; 1861 case Opt_tpgt: 1862 ret = match_int(args, &arg); 1863 if (ret) 1864 goto out; 1865 tpgt = (u16)arg; 1866 break; 1867 case Opt_port_rtpi: 1868 ret = match_int(args, &arg); 1869 if (ret) 1870 goto out; 1871 break; 1872 case Opt_target_lun: 1873 ret = match_u64(args, &tmp_ll); 1874 if (ret) 1875 goto out; 1876 target_lun = (u64)tmp_ll; 1877 break; 1878 default: 1879 break; 1880 } 1881 } 1882 1883 if (!i_port || !t_port || !sa_res_key) { 1884 pr_err("Illegal parameters for APTPL registration\n"); 1885 ret = -EINVAL; 1886 goto out; 1887 } 1888 1889 if (res_holder && !(type)) { 1890 pr_err("Illegal PR type: 0x%02x for reservation" 1891 " holder\n", type); 1892 ret = -EINVAL; 1893 goto out; 1894 } 1895 1896 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, 1897 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 1898 res_holder, all_tg_pt, type); 1899 out: 1900 kfree(i_fabric); 1901 kfree(i_port); 1902 kfree(isid); 1903 kfree(t_fabric); 1904 kfree(t_port); 1905 kfree(orig); 1906 return (ret == 0) ? count : ret; 1907 } 1908 1909 1910 CONFIGFS_ATTR_RO(target_pr_, res_holder); 1911 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts); 1912 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation); 1913 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port); 1914 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts); 1915 CONFIGFS_ATTR_RO(target_pr_, res_pr_type); 1916 CONFIGFS_ATTR_RO(target_pr_, res_type); 1917 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active); 1918 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata); 1919 1920 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 1921 &target_pr_attr_res_holder, 1922 &target_pr_attr_res_pr_all_tgt_pts, 1923 &target_pr_attr_res_pr_generation, 1924 &target_pr_attr_res_pr_holder_tg_port, 1925 &target_pr_attr_res_pr_registered_i_pts, 1926 &target_pr_attr_res_pr_type, 1927 &target_pr_attr_res_type, 1928 &target_pr_attr_res_aptpl_active, 1929 &target_pr_attr_res_aptpl_metadata, 1930 NULL, 1931 }; 1932 1933 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs); 1934 1935 /* End functions for struct config_item_type tb_dev_pr_cit */ 1936 1937 /* Start functions for struct config_item_type tb_dev_cit */ 1938 1939 static inline struct se_device *to_device(struct config_item *item) 1940 { 1941 return container_of(to_config_group(item), struct se_device, dev_group); 1942 } 1943 1944 static ssize_t target_dev_info_show(struct config_item *item, char *page) 1945 { 1946 struct se_device *dev = to_device(item); 1947 int bl = 0; 1948 ssize_t read_bytes = 0; 1949 1950 transport_dump_dev_state(dev, page, &bl); 1951 read_bytes += bl; 1952 read_bytes += dev->transport->show_configfs_dev_params(dev, 1953 page+read_bytes); 1954 return read_bytes; 1955 } 1956 1957 static ssize_t target_dev_control_store(struct config_item *item, 1958 const char *page, size_t count) 1959 { 1960 struct se_device *dev = to_device(item); 1961 1962 return dev->transport->set_configfs_dev_params(dev, page, count); 1963 } 1964 1965 static ssize_t target_dev_alias_show(struct config_item *item, char *page) 1966 { 1967 struct se_device *dev = to_device(item); 1968 1969 if (!(dev->dev_flags & DF_USING_ALIAS)) 1970 return 0; 1971 1972 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); 1973 } 1974 1975 static ssize_t target_dev_alias_store(struct config_item *item, 1976 const char *page, size_t count) 1977 { 1978 struct se_device *dev = to_device(item); 1979 struct se_hba *hba = dev->se_hba; 1980 ssize_t read_bytes; 1981 1982 if (count > (SE_DEV_ALIAS_LEN-1)) { 1983 pr_err("alias count: %d exceeds" 1984 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 1985 SE_DEV_ALIAS_LEN-1); 1986 return -EINVAL; 1987 } 1988 1989 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); 1990 if (!read_bytes) 1991 return -EINVAL; 1992 if (dev->dev_alias[read_bytes - 1] == '\n') 1993 dev->dev_alias[read_bytes - 1] = '\0'; 1994 1995 dev->dev_flags |= DF_USING_ALIAS; 1996 1997 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 1998 config_item_name(&hba->hba_group.cg_item), 1999 config_item_name(&dev->dev_group.cg_item), 2000 dev->dev_alias); 2001 2002 return read_bytes; 2003 } 2004 2005 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page) 2006 { 2007 struct se_device *dev = to_device(item); 2008 2009 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) 2010 return 0; 2011 2012 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); 2013 } 2014 2015 static ssize_t target_dev_udev_path_store(struct config_item *item, 2016 const char *page, size_t count) 2017 { 2018 struct se_device *dev = to_device(item); 2019 struct se_hba *hba = dev->se_hba; 2020 ssize_t read_bytes; 2021 2022 if (count > (SE_UDEV_PATH_LEN-1)) { 2023 pr_err("udev_path count: %d exceeds" 2024 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 2025 SE_UDEV_PATH_LEN-1); 2026 return -EINVAL; 2027 } 2028 2029 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, 2030 "%s", page); 2031 if (!read_bytes) 2032 return -EINVAL; 2033 if (dev->udev_path[read_bytes - 1] == '\n') 2034 dev->udev_path[read_bytes - 1] = '\0'; 2035 2036 dev->dev_flags |= DF_USING_UDEV_PATH; 2037 2038 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 2039 config_item_name(&hba->hba_group.cg_item), 2040 config_item_name(&dev->dev_group.cg_item), 2041 dev->udev_path); 2042 2043 return read_bytes; 2044 } 2045 2046 static ssize_t target_dev_enable_show(struct config_item *item, char *page) 2047 { 2048 struct se_device *dev = to_device(item); 2049 2050 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev)); 2051 } 2052 2053 static ssize_t target_dev_enable_store(struct config_item *item, 2054 const char *page, size_t count) 2055 { 2056 struct se_device *dev = to_device(item); 2057 char *ptr; 2058 int ret; 2059 2060 ptr = strstr(page, "1"); 2061 if (!ptr) { 2062 pr_err("For dev_enable ops, only valid value" 2063 " is \"1\"\n"); 2064 return -EINVAL; 2065 } 2066 2067 ret = target_configure_device(dev); 2068 if (ret) 2069 return ret; 2070 return count; 2071 } 2072 2073 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page) 2074 { 2075 struct se_device *dev = to_device(item); 2076 struct config_item *lu_ci; 2077 struct t10_alua_lu_gp *lu_gp; 2078 struct t10_alua_lu_gp_member *lu_gp_mem; 2079 ssize_t len = 0; 2080 2081 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2082 if (!lu_gp_mem) 2083 return 0; 2084 2085 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2086 lu_gp = lu_gp_mem->lu_gp; 2087 if (lu_gp) { 2088 lu_ci = &lu_gp->lu_gp_group.cg_item; 2089 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 2090 config_item_name(lu_ci), lu_gp->lu_gp_id); 2091 } 2092 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2093 2094 return len; 2095 } 2096 2097 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item, 2098 const char *page, size_t count) 2099 { 2100 struct se_device *dev = to_device(item); 2101 struct se_hba *hba = dev->se_hba; 2102 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 2103 struct t10_alua_lu_gp_member *lu_gp_mem; 2104 unsigned char buf[LU_GROUP_NAME_BUF]; 2105 int move = 0; 2106 2107 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2108 if (!lu_gp_mem) 2109 return count; 2110 2111 if (count > LU_GROUP_NAME_BUF) { 2112 pr_err("ALUA LU Group Alias too large!\n"); 2113 return -EINVAL; 2114 } 2115 memset(buf, 0, LU_GROUP_NAME_BUF); 2116 memcpy(buf, page, count); 2117 /* 2118 * Any ALUA logical unit alias besides "NULL" means we will be 2119 * making a new group association. 2120 */ 2121 if (strcmp(strstrip(buf), "NULL")) { 2122 /* 2123 * core_alua_get_lu_gp_by_name() will increment reference to 2124 * struct t10_alua_lu_gp. This reference is released with 2125 * core_alua_get_lu_gp_by_name below(). 2126 */ 2127 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 2128 if (!lu_gp_new) 2129 return -ENODEV; 2130 } 2131 2132 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2133 lu_gp = lu_gp_mem->lu_gp; 2134 if (lu_gp) { 2135 /* 2136 * Clearing an existing lu_gp association, and replacing 2137 * with NULL 2138 */ 2139 if (!lu_gp_new) { 2140 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 2141 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 2142 " %hu\n", 2143 config_item_name(&hba->hba_group.cg_item), 2144 config_item_name(&dev->dev_group.cg_item), 2145 config_item_name(&lu_gp->lu_gp_group.cg_item), 2146 lu_gp->lu_gp_id); 2147 2148 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2149 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2150 2151 return count; 2152 } 2153 /* 2154 * Removing existing association of lu_gp_mem with lu_gp 2155 */ 2156 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2157 move = 1; 2158 } 2159 /* 2160 * Associate lu_gp_mem with lu_gp_new. 2161 */ 2162 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 2163 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2164 2165 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 2166 " core/alua/lu_gps/%s, ID: %hu\n", 2167 (move) ? "Moving" : "Adding", 2168 config_item_name(&hba->hba_group.cg_item), 2169 config_item_name(&dev->dev_group.cg_item), 2170 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 2171 lu_gp_new->lu_gp_id); 2172 2173 core_alua_put_lu_gp_from_name(lu_gp_new); 2174 return count; 2175 } 2176 2177 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page) 2178 { 2179 struct se_device *dev = to_device(item); 2180 struct t10_alua_lba_map *map; 2181 struct t10_alua_lba_map_member *mem; 2182 char *b = page; 2183 int bl = 0; 2184 char state; 2185 2186 spin_lock(&dev->t10_alua.lba_map_lock); 2187 if (!list_empty(&dev->t10_alua.lba_map_list)) 2188 bl += sprintf(b + bl, "%u %u\n", 2189 dev->t10_alua.lba_map_segment_size, 2190 dev->t10_alua.lba_map_segment_multiplier); 2191 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) { 2192 bl += sprintf(b + bl, "%llu %llu", 2193 map->lba_map_first_lba, map->lba_map_last_lba); 2194 list_for_each_entry(mem, &map->lba_map_mem_list, 2195 lba_map_mem_list) { 2196 switch (mem->lba_map_mem_alua_state) { 2197 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: 2198 state = 'O'; 2199 break; 2200 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: 2201 state = 'A'; 2202 break; 2203 case ALUA_ACCESS_STATE_STANDBY: 2204 state = 'S'; 2205 break; 2206 case ALUA_ACCESS_STATE_UNAVAILABLE: 2207 state = 'U'; 2208 break; 2209 default: 2210 state = '.'; 2211 break; 2212 } 2213 bl += sprintf(b + bl, " %d:%c", 2214 mem->lba_map_mem_alua_pg_id, state); 2215 } 2216 bl += sprintf(b + bl, "\n"); 2217 } 2218 spin_unlock(&dev->t10_alua.lba_map_lock); 2219 return bl; 2220 } 2221 2222 static ssize_t target_dev_lba_map_store(struct config_item *item, 2223 const char *page, size_t count) 2224 { 2225 struct se_device *dev = to_device(item); 2226 struct t10_alua_lba_map *lba_map = NULL; 2227 struct list_head lba_list; 2228 char *map_entries, *orig, *ptr; 2229 char state; 2230 int pg_num = -1, pg; 2231 int ret = 0, num = 0, pg_id, alua_state; 2232 unsigned long start_lba = -1, end_lba = -1; 2233 unsigned long segment_size = -1, segment_mult = -1; 2234 2235 orig = map_entries = kstrdup(page, GFP_KERNEL); 2236 if (!map_entries) 2237 return -ENOMEM; 2238 2239 INIT_LIST_HEAD(&lba_list); 2240 while ((ptr = strsep(&map_entries, "\n")) != NULL) { 2241 if (!*ptr) 2242 continue; 2243 2244 if (num == 0) { 2245 if (sscanf(ptr, "%lu %lu\n", 2246 &segment_size, &segment_mult) != 2) { 2247 pr_err("Invalid line %d\n", num); 2248 ret = -EINVAL; 2249 break; 2250 } 2251 num++; 2252 continue; 2253 } 2254 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) { 2255 pr_err("Invalid line %d\n", num); 2256 ret = -EINVAL; 2257 break; 2258 } 2259 ptr = strchr(ptr, ' '); 2260 if (!ptr) { 2261 pr_err("Invalid line %d, missing end lba\n", num); 2262 ret = -EINVAL; 2263 break; 2264 } 2265 ptr++; 2266 ptr = strchr(ptr, ' '); 2267 if (!ptr) { 2268 pr_err("Invalid line %d, missing state definitions\n", 2269 num); 2270 ret = -EINVAL; 2271 break; 2272 } 2273 ptr++; 2274 lba_map = core_alua_allocate_lba_map(&lba_list, 2275 start_lba, end_lba); 2276 if (IS_ERR(lba_map)) { 2277 ret = PTR_ERR(lba_map); 2278 break; 2279 } 2280 pg = 0; 2281 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) { 2282 switch (state) { 2283 case 'O': 2284 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED; 2285 break; 2286 case 'A': 2287 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED; 2288 break; 2289 case 'S': 2290 alua_state = ALUA_ACCESS_STATE_STANDBY; 2291 break; 2292 case 'U': 2293 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE; 2294 break; 2295 default: 2296 pr_err("Invalid ALUA state '%c'\n", state); 2297 ret = -EINVAL; 2298 goto out; 2299 } 2300 2301 ret = core_alua_allocate_lba_map_mem(lba_map, 2302 pg_id, alua_state); 2303 if (ret) { 2304 pr_err("Invalid target descriptor %d:%c " 2305 "at line %d\n", 2306 pg_id, state, num); 2307 break; 2308 } 2309 pg++; 2310 ptr = strchr(ptr, ' '); 2311 if (ptr) 2312 ptr++; 2313 else 2314 break; 2315 } 2316 if (pg_num == -1) 2317 pg_num = pg; 2318 else if (pg != pg_num) { 2319 pr_err("Only %d from %d port groups definitions " 2320 "at line %d\n", pg, pg_num, num); 2321 ret = -EINVAL; 2322 break; 2323 } 2324 num++; 2325 } 2326 out: 2327 if (ret) { 2328 core_alua_free_lba_map(&lba_list); 2329 count = ret; 2330 } else 2331 core_alua_set_lba_map(dev, &lba_list, 2332 segment_size, segment_mult); 2333 kfree(orig); 2334 return count; 2335 } 2336 2337 CONFIGFS_ATTR_RO(target_dev_, info); 2338 CONFIGFS_ATTR_WO(target_dev_, control); 2339 CONFIGFS_ATTR(target_dev_, alias); 2340 CONFIGFS_ATTR(target_dev_, udev_path); 2341 CONFIGFS_ATTR(target_dev_, enable); 2342 CONFIGFS_ATTR(target_dev_, alua_lu_gp); 2343 CONFIGFS_ATTR(target_dev_, lba_map); 2344 2345 static struct configfs_attribute *target_core_dev_attrs[] = { 2346 &target_dev_attr_info, 2347 &target_dev_attr_control, 2348 &target_dev_attr_alias, 2349 &target_dev_attr_udev_path, 2350 &target_dev_attr_enable, 2351 &target_dev_attr_alua_lu_gp, 2352 &target_dev_attr_lba_map, 2353 NULL, 2354 }; 2355 2356 static void target_core_dev_release(struct config_item *item) 2357 { 2358 struct config_group *dev_cg = to_config_group(item); 2359 struct se_device *dev = 2360 container_of(dev_cg, struct se_device, dev_group); 2361 2362 target_free_device(dev); 2363 } 2364 2365 /* 2366 * Used in target_core_fabric_configfs.c to verify valid se_device symlink 2367 * within target_fabric_port_link() 2368 */ 2369 struct configfs_item_operations target_core_dev_item_ops = { 2370 .release = target_core_dev_release, 2371 }; 2372 2373 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs); 2374 2375 /* End functions for struct config_item_type tb_dev_cit */ 2376 2377 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 2378 2379 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item) 2380 { 2381 return container_of(to_config_group(item), struct t10_alua_lu_gp, 2382 lu_gp_group); 2383 } 2384 2385 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page) 2386 { 2387 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2388 2389 if (!lu_gp->lu_gp_valid_id) 2390 return 0; 2391 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2392 } 2393 2394 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item, 2395 const char *page, size_t count) 2396 { 2397 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2398 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2399 unsigned long lu_gp_id; 2400 int ret; 2401 2402 ret = kstrtoul(page, 0, &lu_gp_id); 2403 if (ret < 0) { 2404 pr_err("kstrtoul() returned %d for" 2405 " lu_gp_id\n", ret); 2406 return ret; 2407 } 2408 if (lu_gp_id > 0x0000ffff) { 2409 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 2410 " 0x0000ffff\n", lu_gp_id); 2411 return -EINVAL; 2412 } 2413 2414 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2415 if (ret < 0) 2416 return -EINVAL; 2417 2418 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 2419 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2420 config_item_name(&alua_lu_gp_cg->cg_item), 2421 lu_gp->lu_gp_id); 2422 2423 return count; 2424 } 2425 2426 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page) 2427 { 2428 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2429 struct se_device *dev; 2430 struct se_hba *hba; 2431 struct t10_alua_lu_gp_member *lu_gp_mem; 2432 ssize_t len = 0, cur_len; 2433 unsigned char buf[LU_GROUP_NAME_BUF]; 2434 2435 memset(buf, 0, LU_GROUP_NAME_BUF); 2436 2437 spin_lock(&lu_gp->lu_gp_lock); 2438 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2439 dev = lu_gp_mem->lu_gp_mem_dev; 2440 hba = dev->se_hba; 2441 2442 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 2443 config_item_name(&hba->hba_group.cg_item), 2444 config_item_name(&dev->dev_group.cg_item)); 2445 cur_len++; /* Extra byte for NULL terminator */ 2446 2447 if ((cur_len + len) > PAGE_SIZE) { 2448 pr_warn("Ran out of lu_gp_show_attr" 2449 "_members buffer\n"); 2450 break; 2451 } 2452 memcpy(page+len, buf, cur_len); 2453 len += cur_len; 2454 } 2455 spin_unlock(&lu_gp->lu_gp_lock); 2456 2457 return len; 2458 } 2459 2460 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id); 2461 CONFIGFS_ATTR_RO(target_lu_gp_, members); 2462 2463 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2464 &target_lu_gp_attr_lu_gp_id, 2465 &target_lu_gp_attr_members, 2466 NULL, 2467 }; 2468 2469 static void target_core_alua_lu_gp_release(struct config_item *item) 2470 { 2471 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2472 struct t10_alua_lu_gp, lu_gp_group); 2473 2474 core_alua_free_lu_gp(lu_gp); 2475 } 2476 2477 static struct configfs_item_operations target_core_alua_lu_gp_ops = { 2478 .release = target_core_alua_lu_gp_release, 2479 }; 2480 2481 static const struct config_item_type target_core_alua_lu_gp_cit = { 2482 .ct_item_ops = &target_core_alua_lu_gp_ops, 2483 .ct_attrs = target_core_alua_lu_gp_attrs, 2484 .ct_owner = THIS_MODULE, 2485 }; 2486 2487 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2488 2489 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2490 2491 static struct config_group *target_core_alua_create_lu_gp( 2492 struct config_group *group, 2493 const char *name) 2494 { 2495 struct t10_alua_lu_gp *lu_gp; 2496 struct config_group *alua_lu_gp_cg = NULL; 2497 struct config_item *alua_lu_gp_ci = NULL; 2498 2499 lu_gp = core_alua_allocate_lu_gp(name, 0); 2500 if (IS_ERR(lu_gp)) 2501 return NULL; 2502 2503 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2504 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2505 2506 config_group_init_type_name(alua_lu_gp_cg, name, 2507 &target_core_alua_lu_gp_cit); 2508 2509 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2510 " Group: core/alua/lu_gps/%s\n", 2511 config_item_name(alua_lu_gp_ci)); 2512 2513 return alua_lu_gp_cg; 2514 2515 } 2516 2517 static void target_core_alua_drop_lu_gp( 2518 struct config_group *group, 2519 struct config_item *item) 2520 { 2521 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2522 struct t10_alua_lu_gp, lu_gp_group); 2523 2524 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2525 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2526 config_item_name(item), lu_gp->lu_gp_id); 2527 /* 2528 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 2529 * -> target_core_alua_lu_gp_release() 2530 */ 2531 config_item_put(item); 2532 } 2533 2534 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2535 .make_group = &target_core_alua_create_lu_gp, 2536 .drop_item = &target_core_alua_drop_lu_gp, 2537 }; 2538 2539 static const struct config_item_type target_core_alua_lu_gps_cit = { 2540 .ct_item_ops = NULL, 2541 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2542 .ct_owner = THIS_MODULE, 2543 }; 2544 2545 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2546 2547 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2548 2549 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item) 2550 { 2551 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp, 2552 tg_pt_gp_group); 2553 } 2554 2555 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item, 2556 char *page) 2557 { 2558 return sprintf(page, "%d\n", 2559 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state); 2560 } 2561 2562 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item, 2563 const char *page, size_t count) 2564 { 2565 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2566 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; 2567 unsigned long tmp; 2568 int new_state, ret; 2569 2570 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2571 pr_err("Unable to do implicit ALUA on non valid" 2572 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id); 2573 return -EINVAL; 2574 } 2575 if (!target_dev_configured(dev)) { 2576 pr_err("Unable to set alua_access_state while device is" 2577 " not configured\n"); 2578 return -ENODEV; 2579 } 2580 2581 ret = kstrtoul(page, 0, &tmp); 2582 if (ret < 0) { 2583 pr_err("Unable to extract new ALUA access state from" 2584 " %s\n", page); 2585 return ret; 2586 } 2587 new_state = (int)tmp; 2588 2589 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) { 2590 pr_err("Unable to process implicit configfs ALUA" 2591 " transition while TPGS_IMPLICIT_ALUA is disabled\n"); 2592 return -EINVAL; 2593 } 2594 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA && 2595 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) { 2596 /* LBA DEPENDENT is only allowed with implicit ALUA */ 2597 pr_err("Unable to process implicit configfs ALUA transition" 2598 " while explicit ALUA management is enabled\n"); 2599 return -EINVAL; 2600 } 2601 2602 ret = core_alua_do_port_transition(tg_pt_gp, dev, 2603 NULL, NULL, new_state, 0); 2604 return (!ret) ? count : -EINVAL; 2605 } 2606 2607 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item, 2608 char *page) 2609 { 2610 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2611 return sprintf(page, "%s\n", 2612 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2613 } 2614 2615 static ssize_t target_tg_pt_gp_alua_access_status_store( 2616 struct config_item *item, const char *page, size_t count) 2617 { 2618 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2619 unsigned long tmp; 2620 int new_status, ret; 2621 2622 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2623 pr_err("Unable to do set ALUA access status on non" 2624 " valid tg_pt_gp ID: %hu\n", 2625 tg_pt_gp->tg_pt_gp_valid_id); 2626 return -EINVAL; 2627 } 2628 2629 ret = kstrtoul(page, 0, &tmp); 2630 if (ret < 0) { 2631 pr_err("Unable to extract new ALUA access status" 2632 " from %s\n", page); 2633 return ret; 2634 } 2635 new_status = (int)tmp; 2636 2637 if ((new_status != ALUA_STATUS_NONE) && 2638 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && 2639 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { 2640 pr_err("Illegal ALUA access status: 0x%02x\n", 2641 new_status); 2642 return -EINVAL; 2643 } 2644 2645 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2646 return count; 2647 } 2648 2649 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item, 2650 char *page) 2651 { 2652 return core_alua_show_access_type(to_tg_pt_gp(item), page); 2653 } 2654 2655 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item, 2656 const char *page, size_t count) 2657 { 2658 return core_alua_store_access_type(to_tg_pt_gp(item), page, count); 2659 } 2660 2661 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \ 2662 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \ 2663 struct config_item *item, char *p) \ 2664 { \ 2665 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 2666 return sprintf(p, "%d\n", \ 2667 !!(t->tg_pt_gp_alua_supported_states & _bit)); \ 2668 } \ 2669 \ 2670 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \ 2671 struct config_item *item, const char *p, size_t c) \ 2672 { \ 2673 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 2674 unsigned long tmp; \ 2675 int ret; \ 2676 \ 2677 if (!t->tg_pt_gp_valid_id) { \ 2678 pr_err("Unable to do set " #_name " ALUA state on non" \ 2679 " valid tg_pt_gp ID: %hu\n", \ 2680 t->tg_pt_gp_valid_id); \ 2681 return -EINVAL; \ 2682 } \ 2683 \ 2684 ret = kstrtoul(p, 0, &tmp); \ 2685 if (ret < 0) { \ 2686 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \ 2687 return -EINVAL; \ 2688 } \ 2689 if (tmp > 1) { \ 2690 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \ 2691 return -EINVAL; \ 2692 } \ 2693 if (tmp) \ 2694 t->tg_pt_gp_alua_supported_states |= _bit; \ 2695 else \ 2696 t->tg_pt_gp_alua_supported_states &= ~_bit; \ 2697 \ 2698 return c; \ 2699 } 2700 2701 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP); 2702 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP); 2703 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP); 2704 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP); 2705 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP); 2706 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP); 2707 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP); 2708 2709 static ssize_t target_tg_pt_gp_alua_write_metadata_show( 2710 struct config_item *item, char *page) 2711 { 2712 return sprintf(page, "%d\n", 2713 to_tg_pt_gp(item)->tg_pt_gp_write_metadata); 2714 } 2715 2716 static ssize_t target_tg_pt_gp_alua_write_metadata_store( 2717 struct config_item *item, const char *page, size_t count) 2718 { 2719 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2720 unsigned long tmp; 2721 int ret; 2722 2723 ret = kstrtoul(page, 0, &tmp); 2724 if (ret < 0) { 2725 pr_err("Unable to extract alua_write_metadata\n"); 2726 return ret; 2727 } 2728 2729 if ((tmp != 0) && (tmp != 1)) { 2730 pr_err("Illegal value for alua_write_metadata:" 2731 " %lu\n", tmp); 2732 return -EINVAL; 2733 } 2734 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 2735 2736 return count; 2737 } 2738 2739 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item, 2740 char *page) 2741 { 2742 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page); 2743 } 2744 2745 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item, 2746 const char *page, size_t count) 2747 { 2748 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page, 2749 count); 2750 } 2751 2752 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item, 2753 char *page) 2754 { 2755 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page); 2756 } 2757 2758 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item, 2759 const char *page, size_t count) 2760 { 2761 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page, 2762 count); 2763 } 2764 2765 static ssize_t target_tg_pt_gp_implicit_trans_secs_show( 2766 struct config_item *item, char *page) 2767 { 2768 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page); 2769 } 2770 2771 static ssize_t target_tg_pt_gp_implicit_trans_secs_store( 2772 struct config_item *item, const char *page, size_t count) 2773 { 2774 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page, 2775 count); 2776 } 2777 2778 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item, 2779 char *page) 2780 { 2781 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page); 2782 } 2783 2784 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item, 2785 const char *page, size_t count) 2786 { 2787 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count); 2788 } 2789 2790 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item, 2791 char *page) 2792 { 2793 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2794 2795 if (!tg_pt_gp->tg_pt_gp_valid_id) 2796 return 0; 2797 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 2798 } 2799 2800 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item, 2801 const char *page, size_t count) 2802 { 2803 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2804 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2805 unsigned long tg_pt_gp_id; 2806 int ret; 2807 2808 ret = kstrtoul(page, 0, &tg_pt_gp_id); 2809 if (ret < 0) { 2810 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n", 2811 page); 2812 return ret; 2813 } 2814 if (tg_pt_gp_id > 0x0000ffff) { 2815 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n", 2816 tg_pt_gp_id); 2817 return -EINVAL; 2818 } 2819 2820 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 2821 if (ret < 0) 2822 return -EINVAL; 2823 2824 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 2825 "core/alua/tg_pt_gps/%s to ID: %hu\n", 2826 config_item_name(&alua_tg_pt_gp_cg->cg_item), 2827 tg_pt_gp->tg_pt_gp_id); 2828 2829 return count; 2830 } 2831 2832 static ssize_t target_tg_pt_gp_members_show(struct config_item *item, 2833 char *page) 2834 { 2835 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2836 struct se_lun *lun; 2837 ssize_t len = 0, cur_len; 2838 unsigned char buf[TG_PT_GROUP_NAME_BUF]; 2839 2840 memset(buf, 0, TG_PT_GROUP_NAME_BUF); 2841 2842 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 2843 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, 2844 lun_tg_pt_gp_link) { 2845 struct se_portal_group *tpg = lun->lun_tpg; 2846 2847 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 2848 "/%s\n", tpg->se_tpg_tfo->fabric_name, 2849 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 2850 tpg->se_tpg_tfo->tpg_get_tag(tpg), 2851 config_item_name(&lun->lun_group.cg_item)); 2852 cur_len++; /* Extra byte for NULL terminator */ 2853 2854 if ((cur_len + len) > PAGE_SIZE) { 2855 pr_warn("Ran out of lu_gp_show_attr" 2856 "_members buffer\n"); 2857 break; 2858 } 2859 memcpy(page+len, buf, cur_len); 2860 len += cur_len; 2861 } 2862 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 2863 2864 return len; 2865 } 2866 2867 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state); 2868 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status); 2869 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type); 2870 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning); 2871 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline); 2872 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent); 2873 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable); 2874 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby); 2875 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized); 2876 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized); 2877 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata); 2878 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs); 2879 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs); 2880 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs); 2881 CONFIGFS_ATTR(target_tg_pt_gp_, preferred); 2882 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id); 2883 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members); 2884 2885 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 2886 &target_tg_pt_gp_attr_alua_access_state, 2887 &target_tg_pt_gp_attr_alua_access_status, 2888 &target_tg_pt_gp_attr_alua_access_type, 2889 &target_tg_pt_gp_attr_alua_support_transitioning, 2890 &target_tg_pt_gp_attr_alua_support_offline, 2891 &target_tg_pt_gp_attr_alua_support_lba_dependent, 2892 &target_tg_pt_gp_attr_alua_support_unavailable, 2893 &target_tg_pt_gp_attr_alua_support_standby, 2894 &target_tg_pt_gp_attr_alua_support_active_nonoptimized, 2895 &target_tg_pt_gp_attr_alua_support_active_optimized, 2896 &target_tg_pt_gp_attr_alua_write_metadata, 2897 &target_tg_pt_gp_attr_nonop_delay_msecs, 2898 &target_tg_pt_gp_attr_trans_delay_msecs, 2899 &target_tg_pt_gp_attr_implicit_trans_secs, 2900 &target_tg_pt_gp_attr_preferred, 2901 &target_tg_pt_gp_attr_tg_pt_gp_id, 2902 &target_tg_pt_gp_attr_members, 2903 NULL, 2904 }; 2905 2906 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 2907 { 2908 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2909 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2910 2911 core_alua_free_tg_pt_gp(tg_pt_gp); 2912 } 2913 2914 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 2915 .release = target_core_alua_tg_pt_gp_release, 2916 }; 2917 2918 static const struct config_item_type target_core_alua_tg_pt_gp_cit = { 2919 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 2920 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 2921 .ct_owner = THIS_MODULE, 2922 }; 2923 2924 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2925 2926 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 2927 2928 static struct config_group *target_core_alua_create_tg_pt_gp( 2929 struct config_group *group, 2930 const char *name) 2931 { 2932 struct t10_alua *alua = container_of(group, struct t10_alua, 2933 alua_tg_pt_gps_group); 2934 struct t10_alua_tg_pt_gp *tg_pt_gp; 2935 struct config_group *alua_tg_pt_gp_cg = NULL; 2936 struct config_item *alua_tg_pt_gp_ci = NULL; 2937 2938 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0); 2939 if (!tg_pt_gp) 2940 return NULL; 2941 2942 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2943 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 2944 2945 config_group_init_type_name(alua_tg_pt_gp_cg, name, 2946 &target_core_alua_tg_pt_gp_cit); 2947 2948 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 2949 " Group: alua/tg_pt_gps/%s\n", 2950 config_item_name(alua_tg_pt_gp_ci)); 2951 2952 return alua_tg_pt_gp_cg; 2953 } 2954 2955 static void target_core_alua_drop_tg_pt_gp( 2956 struct config_group *group, 2957 struct config_item *item) 2958 { 2959 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2960 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2961 2962 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 2963 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 2964 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 2965 /* 2966 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 2967 * -> target_core_alua_tg_pt_gp_release(). 2968 */ 2969 config_item_put(item); 2970 } 2971 2972 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 2973 .make_group = &target_core_alua_create_tg_pt_gp, 2974 .drop_item = &target_core_alua_drop_tg_pt_gp, 2975 }; 2976 2977 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL); 2978 2979 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 2980 2981 /* Start functions for struct config_item_type target_core_alua_cit */ 2982 2983 /* 2984 * target_core_alua_cit is a ConfigFS group that lives under 2985 * /sys/kernel/config/target/core/alua. There are default groups 2986 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 2987 * target_core_alua_cit in target_core_init_configfs() below. 2988 */ 2989 static const struct config_item_type target_core_alua_cit = { 2990 .ct_item_ops = NULL, 2991 .ct_attrs = NULL, 2992 .ct_owner = THIS_MODULE, 2993 }; 2994 2995 /* End functions for struct config_item_type target_core_alua_cit */ 2996 2997 /* Start functions for struct config_item_type tb_dev_stat_cit */ 2998 2999 static struct config_group *target_core_stat_mkdir( 3000 struct config_group *group, 3001 const char *name) 3002 { 3003 return ERR_PTR(-ENOSYS); 3004 } 3005 3006 static void target_core_stat_rmdir( 3007 struct config_group *group, 3008 struct config_item *item) 3009 { 3010 return; 3011 } 3012 3013 static struct configfs_group_operations target_core_stat_group_ops = { 3014 .make_group = &target_core_stat_mkdir, 3015 .drop_item = &target_core_stat_rmdir, 3016 }; 3017 3018 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL); 3019 3020 /* End functions for struct config_item_type tb_dev_stat_cit */ 3021 3022 /* Start functions for struct config_item_type target_core_hba_cit */ 3023 3024 static struct config_group *target_core_make_subdev( 3025 struct config_group *group, 3026 const char *name) 3027 { 3028 struct t10_alua_tg_pt_gp *tg_pt_gp; 3029 struct config_item *hba_ci = &group->cg_item; 3030 struct se_hba *hba = item_to_hba(hba_ci); 3031 struct target_backend *tb = hba->backend; 3032 struct se_device *dev; 3033 int errno = -ENOMEM, ret; 3034 3035 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 3036 if (ret) 3037 return ERR_PTR(ret); 3038 3039 dev = target_alloc_device(hba, name); 3040 if (!dev) 3041 goto out_unlock; 3042 3043 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit); 3044 3045 config_group_init_type_name(&dev->dev_action_group, "action", 3046 &tb->tb_dev_action_cit); 3047 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group); 3048 3049 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib", 3050 &tb->tb_dev_attrib_cit); 3051 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group); 3052 3053 config_group_init_type_name(&dev->dev_pr_group, "pr", 3054 &tb->tb_dev_pr_cit); 3055 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group); 3056 3057 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn", 3058 &tb->tb_dev_wwn_cit); 3059 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group, 3060 &dev->dev_group); 3061 3062 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group, 3063 "alua", &tb->tb_dev_alua_tg_pt_gps_cit); 3064 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group, 3065 &dev->dev_group); 3066 3067 config_group_init_type_name(&dev->dev_stat_grps.stat_group, 3068 "statistics", &tb->tb_dev_stat_cit); 3069 configfs_add_default_group(&dev->dev_stat_grps.stat_group, 3070 &dev->dev_group); 3071 3072 /* 3073 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 3074 */ 3075 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1); 3076 if (!tg_pt_gp) 3077 goto out_free_device; 3078 dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 3079 3080 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 3081 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 3082 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group, 3083 &dev->t10_alua.alua_tg_pt_gps_group); 3084 3085 /* 3086 * Add core/$HBA/$DEV/statistics/ default groups 3087 */ 3088 target_stat_setup_dev_default_groups(dev); 3089 3090 mutex_unlock(&hba->hba_access_mutex); 3091 return &dev->dev_group; 3092 3093 out_free_device: 3094 target_free_device(dev); 3095 out_unlock: 3096 mutex_unlock(&hba->hba_access_mutex); 3097 return ERR_PTR(errno); 3098 } 3099 3100 static void target_core_drop_subdev( 3101 struct config_group *group, 3102 struct config_item *item) 3103 { 3104 struct config_group *dev_cg = to_config_group(item); 3105 struct se_device *dev = 3106 container_of(dev_cg, struct se_device, dev_group); 3107 struct se_hba *hba; 3108 3109 hba = item_to_hba(&dev->se_hba->hba_group.cg_item); 3110 3111 mutex_lock(&hba->hba_access_mutex); 3112 3113 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group); 3114 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group); 3115 3116 /* 3117 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 3118 * directly from target_core_alua_tg_pt_gp_release(). 3119 */ 3120 dev->t10_alua.default_tg_pt_gp = NULL; 3121 3122 configfs_remove_default_groups(dev_cg); 3123 3124 /* 3125 * se_dev is released from target_core_dev_item_ops->release() 3126 */ 3127 config_item_put(item); 3128 mutex_unlock(&hba->hba_access_mutex); 3129 } 3130 3131 static struct configfs_group_operations target_core_hba_group_ops = { 3132 .make_group = target_core_make_subdev, 3133 .drop_item = target_core_drop_subdev, 3134 }; 3135 3136 3137 static inline struct se_hba *to_hba(struct config_item *item) 3138 { 3139 return container_of(to_config_group(item), struct se_hba, hba_group); 3140 } 3141 3142 static ssize_t target_hba_info_show(struct config_item *item, char *page) 3143 { 3144 struct se_hba *hba = to_hba(item); 3145 3146 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 3147 hba->hba_id, hba->backend->ops->name, 3148 TARGET_CORE_VERSION); 3149 } 3150 3151 static ssize_t target_hba_mode_show(struct config_item *item, char *page) 3152 { 3153 struct se_hba *hba = to_hba(item); 3154 int hba_mode = 0; 3155 3156 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 3157 hba_mode = 1; 3158 3159 return sprintf(page, "%d\n", hba_mode); 3160 } 3161 3162 static ssize_t target_hba_mode_store(struct config_item *item, 3163 const char *page, size_t count) 3164 { 3165 struct se_hba *hba = to_hba(item); 3166 unsigned long mode_flag; 3167 int ret; 3168 3169 if (hba->backend->ops->pmode_enable_hba == NULL) 3170 return -EINVAL; 3171 3172 ret = kstrtoul(page, 0, &mode_flag); 3173 if (ret < 0) { 3174 pr_err("Unable to extract hba mode flag: %d\n", ret); 3175 return ret; 3176 } 3177 3178 if (hba->dev_count) { 3179 pr_err("Unable to set hba_mode with active devices\n"); 3180 return -EINVAL; 3181 } 3182 3183 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag); 3184 if (ret < 0) 3185 return -EINVAL; 3186 if (ret > 0) 3187 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 3188 else if (ret == 0) 3189 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 3190 3191 return count; 3192 } 3193 3194 CONFIGFS_ATTR_RO(target_, hba_info); 3195 CONFIGFS_ATTR(target_, hba_mode); 3196 3197 static void target_core_hba_release(struct config_item *item) 3198 { 3199 struct se_hba *hba = container_of(to_config_group(item), 3200 struct se_hba, hba_group); 3201 core_delete_hba(hba); 3202 } 3203 3204 static struct configfs_attribute *target_core_hba_attrs[] = { 3205 &target_attr_hba_info, 3206 &target_attr_hba_mode, 3207 NULL, 3208 }; 3209 3210 static struct configfs_item_operations target_core_hba_item_ops = { 3211 .release = target_core_hba_release, 3212 }; 3213 3214 static const struct config_item_type target_core_hba_cit = { 3215 .ct_item_ops = &target_core_hba_item_ops, 3216 .ct_group_ops = &target_core_hba_group_ops, 3217 .ct_attrs = target_core_hba_attrs, 3218 .ct_owner = THIS_MODULE, 3219 }; 3220 3221 static struct config_group *target_core_call_addhbatotarget( 3222 struct config_group *group, 3223 const char *name) 3224 { 3225 char *se_plugin_str, *str, *str2; 3226 struct se_hba *hba; 3227 char buf[TARGET_CORE_NAME_MAX_LEN]; 3228 unsigned long plugin_dep_id = 0; 3229 int ret; 3230 3231 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN); 3232 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 3233 pr_err("Passed *name strlen(): %d exceeds" 3234 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 3235 TARGET_CORE_NAME_MAX_LEN); 3236 return ERR_PTR(-ENAMETOOLONG); 3237 } 3238 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 3239 3240 str = strstr(buf, "_"); 3241 if (!str) { 3242 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 3243 return ERR_PTR(-EINVAL); 3244 } 3245 se_plugin_str = buf; 3246 /* 3247 * Special case for subsystem plugins that have "_" in their names. 3248 * Namely rd_direct and rd_mcp.. 3249 */ 3250 str2 = strstr(str+1, "_"); 3251 if (str2) { 3252 *str2 = '\0'; /* Terminate for *se_plugin_str */ 3253 str2++; /* Skip to start of plugin dependent ID */ 3254 str = str2; 3255 } else { 3256 *str = '\0'; /* Terminate for *se_plugin_str */ 3257 str++; /* Skip to start of plugin dependent ID */ 3258 } 3259 3260 ret = kstrtoul(str, 0, &plugin_dep_id); 3261 if (ret < 0) { 3262 pr_err("kstrtoul() returned %d for" 3263 " plugin_dep_id\n", ret); 3264 return ERR_PTR(ret); 3265 } 3266 /* 3267 * Load up TCM subsystem plugins if they have not already been loaded. 3268 */ 3269 transport_subsystem_check_init(); 3270 3271 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 3272 if (IS_ERR(hba)) 3273 return ERR_CAST(hba); 3274 3275 config_group_init_type_name(&hba->hba_group, name, 3276 &target_core_hba_cit); 3277 3278 return &hba->hba_group; 3279 } 3280 3281 static void target_core_call_delhbafromtarget( 3282 struct config_group *group, 3283 struct config_item *item) 3284 { 3285 /* 3286 * core_delete_hba() is called from target_core_hba_item_ops->release() 3287 * -> target_core_hba_release() 3288 */ 3289 config_item_put(item); 3290 } 3291 3292 static struct configfs_group_operations target_core_group_ops = { 3293 .make_group = target_core_call_addhbatotarget, 3294 .drop_item = target_core_call_delhbafromtarget, 3295 }; 3296 3297 static const struct config_item_type target_core_cit = { 3298 .ct_item_ops = NULL, 3299 .ct_group_ops = &target_core_group_ops, 3300 .ct_attrs = NULL, 3301 .ct_owner = THIS_MODULE, 3302 }; 3303 3304 /* Stop functions for struct config_item_type target_core_hba_cit */ 3305 3306 void target_setup_backend_cits(struct target_backend *tb) 3307 { 3308 target_core_setup_dev_cit(tb); 3309 target_core_setup_dev_action_cit(tb); 3310 target_core_setup_dev_attrib_cit(tb); 3311 target_core_setup_dev_pr_cit(tb); 3312 target_core_setup_dev_wwn_cit(tb); 3313 target_core_setup_dev_alua_tg_pt_gps_cit(tb); 3314 target_core_setup_dev_stat_cit(tb); 3315 } 3316 3317 static void target_init_dbroot(void) 3318 { 3319 struct file *fp; 3320 3321 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED); 3322 fp = filp_open(db_root_stage, O_RDONLY, 0); 3323 if (IS_ERR(fp)) { 3324 pr_err("db_root: cannot open: %s\n", db_root_stage); 3325 return; 3326 } 3327 if (!S_ISDIR(file_inode(fp)->i_mode)) { 3328 filp_close(fp, NULL); 3329 pr_err("db_root: not a valid directory: %s\n", db_root_stage); 3330 return; 3331 } 3332 filp_close(fp, NULL); 3333 3334 strncpy(db_root, db_root_stage, DB_ROOT_LEN); 3335 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); 3336 } 3337 3338 static int __init target_core_init_configfs(void) 3339 { 3340 struct configfs_subsystem *subsys = &target_core_fabrics; 3341 struct t10_alua_lu_gp *lu_gp; 3342 int ret; 3343 3344 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 3345 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3346 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3347 3348 config_group_init(&subsys->su_group); 3349 mutex_init(&subsys->su_mutex); 3350 3351 ret = init_se_kmem_caches(); 3352 if (ret < 0) 3353 return ret; 3354 /* 3355 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3356 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3357 */ 3358 config_group_init_type_name(&target_core_hbagroup, "core", 3359 &target_core_cit); 3360 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group); 3361 3362 /* 3363 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3364 */ 3365 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit); 3366 configfs_add_default_group(&alua_group, &target_core_hbagroup); 3367 3368 /* 3369 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3370 * groups under /sys/kernel/config/target/core/alua/ 3371 */ 3372 config_group_init_type_name(&alua_lu_gps_group, "lu_gps", 3373 &target_core_alua_lu_gps_cit); 3374 configfs_add_default_group(&alua_lu_gps_group, &alua_group); 3375 3376 /* 3377 * Add core/alua/lu_gps/default_lu_gp 3378 */ 3379 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3380 if (IS_ERR(lu_gp)) { 3381 ret = -ENOMEM; 3382 goto out_global; 3383 } 3384 3385 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3386 &target_core_alua_lu_gp_cit); 3387 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group); 3388 3389 default_lu_gp = lu_gp; 3390 3391 /* 3392 * Register the target_core_mod subsystem with configfs. 3393 */ 3394 ret = configfs_register_subsystem(subsys); 3395 if (ret < 0) { 3396 pr_err("Error %d while registering subsystem %s\n", 3397 ret, subsys->su_group.cg_item.ci_namebuf); 3398 goto out_global; 3399 } 3400 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 3401 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s" 3402 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3403 /* 3404 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3405 */ 3406 ret = rd_module_init(); 3407 if (ret < 0) 3408 goto out; 3409 3410 ret = core_dev_setup_virtual_lun0(); 3411 if (ret < 0) 3412 goto out; 3413 3414 ret = target_xcopy_setup_pt(); 3415 if (ret < 0) 3416 goto out; 3417 3418 target_init_dbroot(); 3419 3420 return 0; 3421 3422 out: 3423 configfs_unregister_subsystem(subsys); 3424 core_dev_release_virtual_lun0(); 3425 rd_module_exit(); 3426 out_global: 3427 if (default_lu_gp) { 3428 core_alua_free_lu_gp(default_lu_gp); 3429 default_lu_gp = NULL; 3430 } 3431 release_se_kmem_caches(); 3432 return ret; 3433 } 3434 3435 static void __exit target_core_exit_configfs(void) 3436 { 3437 configfs_remove_default_groups(&alua_lu_gps_group); 3438 configfs_remove_default_groups(&alua_group); 3439 configfs_remove_default_groups(&target_core_hbagroup); 3440 3441 /* 3442 * We expect subsys->su_group.default_groups to be released 3443 * by configfs subsystem provider logic.. 3444 */ 3445 configfs_unregister_subsystem(&target_core_fabrics); 3446 3447 core_alua_free_lu_gp(default_lu_gp); 3448 default_lu_gp = NULL; 3449 3450 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3451 " Infrastructure\n"); 3452 3453 core_dev_release_virtual_lun0(); 3454 rd_module_exit(); 3455 target_xcopy_release_pt(); 3456 release_se_kmem_caches(); 3457 } 3458 3459 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3460 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3461 MODULE_LICENSE("GPL"); 3462 3463 module_init(target_core_init_configfs); 3464 module_exit(target_core_exit_configfs); 3465