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