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 static ssize_t target_check_inquiry_data(char *buf) 1231 { 1232 size_t len; 1233 int i; 1234 1235 len = strlen(buf); 1236 1237 /* 1238 * SPC 4.3.1: 1239 * ASCII data fields shall contain only ASCII printable characters 1240 * (i.e., code values 20h to 7Eh) and may be terminated with one or 1241 * more ASCII null (00h) characters. 1242 */ 1243 for (i = 0; i < len; i++) { 1244 if (buf[i] < 0x20 || buf[i] > 0x7E) { 1245 pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n"); 1246 return -EINVAL; 1247 } 1248 } 1249 1250 return len; 1251 } 1252 1253 /* 1254 * STANDARD and VPD page 0x83 T10 Vendor Identification 1255 */ 1256 static ssize_t target_wwn_vendor_id_show(struct config_item *item, 1257 char *page) 1258 { 1259 return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]); 1260 } 1261 1262 static ssize_t target_wwn_vendor_id_store(struct config_item *item, 1263 const char *page, size_t count) 1264 { 1265 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1266 struct se_device *dev = t10_wwn->t10_dev; 1267 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1268 unsigned char buf[INQUIRY_VENDOR_LEN + 2]; 1269 char *stripped = NULL; 1270 size_t len; 1271 ssize_t ret; 1272 1273 len = strlcpy(buf, page, sizeof(buf)); 1274 if (len < sizeof(buf)) { 1275 /* Strip any newline added from userspace. */ 1276 stripped = strstrip(buf); 1277 len = strlen(stripped); 1278 } 1279 if (len > INQUIRY_VENDOR_LEN) { 1280 pr_err("Emulated T10 Vendor Identification exceeds" 1281 " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN) 1282 "\n"); 1283 return -EOVERFLOW; 1284 } 1285 1286 ret = target_check_inquiry_data(stripped); 1287 1288 if (ret < 0) 1289 return ret; 1290 1291 /* 1292 * Check to see if any active exports exist. If they do exist, fail 1293 * here as changing this information on the fly (underneath the 1294 * initiator side OS dependent multipath code) could cause negative 1295 * effects. 1296 */ 1297 if (dev->export_count) { 1298 pr_err("Unable to set T10 Vendor Identification while" 1299 " active %d exports exist\n", dev->export_count); 1300 return -EINVAL; 1301 } 1302 1303 BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1); 1304 strlcpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor)); 1305 1306 pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:" 1307 " %s\n", dev->t10_wwn.vendor); 1308 1309 return count; 1310 } 1311 1312 static ssize_t target_wwn_product_id_show(struct config_item *item, 1313 char *page) 1314 { 1315 return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]); 1316 } 1317 1318 static ssize_t target_wwn_product_id_store(struct config_item *item, 1319 const char *page, size_t count) 1320 { 1321 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1322 struct se_device *dev = t10_wwn->t10_dev; 1323 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1324 unsigned char buf[INQUIRY_MODEL_LEN + 2]; 1325 char *stripped = NULL; 1326 size_t len; 1327 ssize_t ret; 1328 1329 len = strlcpy(buf, page, sizeof(buf)); 1330 if (len < sizeof(buf)) { 1331 /* Strip any newline added from userspace. */ 1332 stripped = strstrip(buf); 1333 len = strlen(stripped); 1334 } 1335 if (len > INQUIRY_MODEL_LEN) { 1336 pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: " 1337 __stringify(INQUIRY_MODEL_LEN) 1338 "\n"); 1339 return -EOVERFLOW; 1340 } 1341 1342 ret = target_check_inquiry_data(stripped); 1343 1344 if (ret < 0) 1345 return ret; 1346 1347 /* 1348 * Check to see if any active exports exist. If they do exist, fail 1349 * here as changing this information on the fly (underneath the 1350 * initiator side OS dependent multipath code) could cause negative 1351 * effects. 1352 */ 1353 if (dev->export_count) { 1354 pr_err("Unable to set T10 Model while active %d exports exist\n", 1355 dev->export_count); 1356 return -EINVAL; 1357 } 1358 1359 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); 1360 strlcpy(dev->t10_wwn.model, stripped, sizeof(dev->t10_wwn.model)); 1361 1362 pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n", 1363 dev->t10_wwn.model); 1364 1365 return count; 1366 } 1367 1368 static ssize_t target_wwn_revision_show(struct config_item *item, 1369 char *page) 1370 { 1371 return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]); 1372 } 1373 1374 static ssize_t target_wwn_revision_store(struct config_item *item, 1375 const char *page, size_t count) 1376 { 1377 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1378 struct se_device *dev = t10_wwn->t10_dev; 1379 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1380 unsigned char buf[INQUIRY_REVISION_LEN + 2]; 1381 char *stripped = NULL; 1382 size_t len; 1383 ssize_t ret; 1384 1385 len = strlcpy(buf, page, sizeof(buf)); 1386 if (len < sizeof(buf)) { 1387 /* Strip any newline added from userspace. */ 1388 stripped = strstrip(buf); 1389 len = strlen(stripped); 1390 } 1391 if (len > INQUIRY_REVISION_LEN) { 1392 pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: " 1393 __stringify(INQUIRY_REVISION_LEN) 1394 "\n"); 1395 return -EOVERFLOW; 1396 } 1397 1398 ret = target_check_inquiry_data(stripped); 1399 1400 if (ret < 0) 1401 return ret; 1402 1403 /* 1404 * Check to see if any active exports exist. If they do exist, fail 1405 * here as changing this information on the fly (underneath the 1406 * initiator side OS dependent multipath code) could cause negative 1407 * effects. 1408 */ 1409 if (dev->export_count) { 1410 pr_err("Unable to set T10 Revision while active %d exports exist\n", 1411 dev->export_count); 1412 return -EINVAL; 1413 } 1414 1415 BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1); 1416 strlcpy(dev->t10_wwn.revision, stripped, sizeof(dev->t10_wwn.revision)); 1417 1418 pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n", 1419 dev->t10_wwn.revision); 1420 1421 return count; 1422 } 1423 1424 /* 1425 * VPD page 0x80 Unit serial 1426 */ 1427 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item, 1428 char *page) 1429 { 1430 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 1431 &to_t10_wwn(item)->unit_serial[0]); 1432 } 1433 1434 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item, 1435 const char *page, size_t count) 1436 { 1437 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1438 struct se_device *dev = t10_wwn->t10_dev; 1439 unsigned char buf[INQUIRY_VPD_SERIAL_LEN]; 1440 1441 /* 1442 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 1443 * from the struct scsi_device level firmware, do not allow 1444 * VPD Unit Serial to be emulated. 1445 * 1446 * Note this struct scsi_device could also be emulating VPD 1447 * information from its drivers/scsi LLD. But for now we assume 1448 * it is doing 'the right thing' wrt a world wide unique 1449 * VPD Unit Serial Number that OS dependent multipath can depend on. 1450 */ 1451 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) { 1452 pr_err("Underlying SCSI device firmware provided VPD" 1453 " Unit Serial, ignoring request\n"); 1454 return -EOPNOTSUPP; 1455 } 1456 1457 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 1458 pr_err("Emulated VPD Unit Serial exceeds" 1459 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 1460 return -EOVERFLOW; 1461 } 1462 /* 1463 * Check to see if any active $FABRIC_MOD exports exist. If they 1464 * do exist, fail here as changing this information on the fly 1465 * (underneath the initiator side OS dependent multipath code) 1466 * could cause negative effects. 1467 */ 1468 if (dev->export_count) { 1469 pr_err("Unable to set VPD Unit Serial while" 1470 " active %d $FABRIC_MOD exports exist\n", 1471 dev->export_count); 1472 return -EINVAL; 1473 } 1474 1475 /* 1476 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 1477 * 1478 * Also, strip any newline added from the userspace 1479 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 1480 */ 1481 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN); 1482 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 1483 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 1484 "%s", strstrip(buf)); 1485 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL; 1486 1487 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 1488 " %s\n", dev->t10_wwn.unit_serial); 1489 1490 return count; 1491 } 1492 1493 /* 1494 * VPD page 0x83 Protocol Identifier 1495 */ 1496 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item, 1497 char *page) 1498 { 1499 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1500 struct t10_vpd *vpd; 1501 unsigned char buf[VPD_TMP_BUF_SIZE]; 1502 ssize_t len = 0; 1503 1504 memset(buf, 0, VPD_TMP_BUF_SIZE); 1505 1506 spin_lock(&t10_wwn->t10_vpd_lock); 1507 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 1508 if (!vpd->protocol_identifier_set) 1509 continue; 1510 1511 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 1512 1513 if (len + strlen(buf) >= PAGE_SIZE) 1514 break; 1515 1516 len += sprintf(page+len, "%s", buf); 1517 } 1518 spin_unlock(&t10_wwn->t10_vpd_lock); 1519 1520 return len; 1521 } 1522 1523 /* 1524 * Generic wrapper for dumping VPD identifiers by association. 1525 */ 1526 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 1527 static ssize_t target_wwn_##_name##_show(struct config_item *item, \ 1528 char *page) \ 1529 { \ 1530 struct t10_wwn *t10_wwn = to_t10_wwn(item); \ 1531 struct t10_vpd *vpd; \ 1532 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 1533 ssize_t len = 0; \ 1534 \ 1535 spin_lock(&t10_wwn->t10_vpd_lock); \ 1536 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 1537 if (vpd->association != _assoc) \ 1538 continue; \ 1539 \ 1540 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1541 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 1542 if (len + strlen(buf) >= PAGE_SIZE) \ 1543 break; \ 1544 len += sprintf(page+len, "%s", buf); \ 1545 \ 1546 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1547 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 1548 if (len + strlen(buf) >= PAGE_SIZE) \ 1549 break; \ 1550 len += sprintf(page+len, "%s", buf); \ 1551 \ 1552 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1553 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 1554 if (len + strlen(buf) >= PAGE_SIZE) \ 1555 break; \ 1556 len += sprintf(page+len, "%s", buf); \ 1557 } \ 1558 spin_unlock(&t10_wwn->t10_vpd_lock); \ 1559 \ 1560 return len; \ 1561 } 1562 1563 /* VPD page 0x83 Association: Logical Unit */ 1564 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 1565 /* VPD page 0x83 Association: Target Port */ 1566 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 1567 /* VPD page 0x83 Association: SCSI Target Device */ 1568 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 1569 1570 CONFIGFS_ATTR(target_wwn_, vendor_id); 1571 CONFIGFS_ATTR(target_wwn_, product_id); 1572 CONFIGFS_ATTR(target_wwn_, revision); 1573 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial); 1574 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier); 1575 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit); 1576 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port); 1577 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device); 1578 1579 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 1580 &target_wwn_attr_vendor_id, 1581 &target_wwn_attr_product_id, 1582 &target_wwn_attr_revision, 1583 &target_wwn_attr_vpd_unit_serial, 1584 &target_wwn_attr_vpd_protocol_identifier, 1585 &target_wwn_attr_vpd_assoc_logical_unit, 1586 &target_wwn_attr_vpd_assoc_target_port, 1587 &target_wwn_attr_vpd_assoc_scsi_target_device, 1588 NULL, 1589 }; 1590 1591 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs); 1592 1593 /* End functions for struct config_item_type tb_dev_wwn_cit */ 1594 1595 /* Start functions for struct config_item_type tb_dev_pr_cit */ 1596 1597 static struct se_device *pr_to_dev(struct config_item *item) 1598 { 1599 return container_of(to_config_group(item), struct se_device, 1600 dev_pr_group); 1601 } 1602 1603 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev, 1604 char *page) 1605 { 1606 struct se_node_acl *se_nacl; 1607 struct t10_pr_registration *pr_reg; 1608 char i_buf[PR_REG_ISID_ID_LEN]; 1609 1610 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1611 1612 pr_reg = dev->dev_pr_res_holder; 1613 if (!pr_reg) 1614 return sprintf(page, "No SPC-3 Reservation holder\n"); 1615 1616 se_nacl = pr_reg->pr_reg_nacl; 1617 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1618 1619 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", 1620 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1621 se_nacl->initiatorname, i_buf); 1622 } 1623 1624 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, 1625 char *page) 1626 { 1627 struct se_node_acl *se_nacl; 1628 ssize_t len; 1629 1630 se_nacl = dev->dev_reserved_node_acl; 1631 if (se_nacl) { 1632 len = sprintf(page, 1633 "SPC-2 Reservation: %s Initiator: %s\n", 1634 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1635 se_nacl->initiatorname); 1636 } else { 1637 len = sprintf(page, "No SPC-2 Reservation holder\n"); 1638 } 1639 return len; 1640 } 1641 1642 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page) 1643 { 1644 struct se_device *dev = pr_to_dev(item); 1645 int ret; 1646 1647 if (!dev->dev_attrib.emulate_pr) 1648 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 1649 1650 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1651 return sprintf(page, "Passthrough\n"); 1652 1653 spin_lock(&dev->dev_reservation_lock); 1654 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1655 ret = target_core_dev_pr_show_spc2_res(dev, page); 1656 else 1657 ret = target_core_dev_pr_show_spc3_res(dev, page); 1658 spin_unlock(&dev->dev_reservation_lock); 1659 return ret; 1660 } 1661 1662 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item, 1663 char *page) 1664 { 1665 struct se_device *dev = pr_to_dev(item); 1666 ssize_t len = 0; 1667 1668 spin_lock(&dev->dev_reservation_lock); 1669 if (!dev->dev_pr_res_holder) { 1670 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1671 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { 1672 len = sprintf(page, "SPC-3 Reservation: All Target" 1673 " Ports registration\n"); 1674 } else { 1675 len = sprintf(page, "SPC-3 Reservation: Single" 1676 " Target Port registration\n"); 1677 } 1678 1679 spin_unlock(&dev->dev_reservation_lock); 1680 return len; 1681 } 1682 1683 static ssize_t target_pr_res_pr_generation_show(struct config_item *item, 1684 char *page) 1685 { 1686 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation); 1687 } 1688 1689 1690 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item, 1691 char *page) 1692 { 1693 struct se_device *dev = pr_to_dev(item); 1694 struct se_node_acl *se_nacl; 1695 struct se_portal_group *se_tpg; 1696 struct t10_pr_registration *pr_reg; 1697 const struct target_core_fabric_ops *tfo; 1698 ssize_t len = 0; 1699 1700 spin_lock(&dev->dev_reservation_lock); 1701 pr_reg = dev->dev_pr_res_holder; 1702 if (!pr_reg) { 1703 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1704 goto out_unlock; 1705 } 1706 1707 se_nacl = pr_reg->pr_reg_nacl; 1708 se_tpg = se_nacl->se_tpg; 1709 tfo = se_tpg->se_tpg_tfo; 1710 1711 len += sprintf(page+len, "SPC-3 Reservation: %s" 1712 " Target Node Endpoint: %s\n", tfo->fabric_name, 1713 tfo->tpg_get_wwn(se_tpg)); 1714 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1715 " Identifier Tag: %hu %s Portal Group Tag: %hu" 1716 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi, 1717 tfo->fabric_name, tfo->tpg_get_tag(se_tpg), 1718 tfo->fabric_name, pr_reg->pr_aptpl_target_lun); 1719 1720 out_unlock: 1721 spin_unlock(&dev->dev_reservation_lock); 1722 return len; 1723 } 1724 1725 1726 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item, 1727 char *page) 1728 { 1729 struct se_device *dev = pr_to_dev(item); 1730 const struct target_core_fabric_ops *tfo; 1731 struct t10_pr_registration *pr_reg; 1732 unsigned char buf[384]; 1733 char i_buf[PR_REG_ISID_ID_LEN]; 1734 ssize_t len = 0; 1735 int reg_count = 0; 1736 1737 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1738 1739 spin_lock(&dev->t10_pr.registration_lock); 1740 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1741 pr_reg_list) { 1742 1743 memset(buf, 0, 384); 1744 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1745 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1746 core_pr_dump_initiator_port(pr_reg, i_buf, 1747 PR_REG_ISID_ID_LEN); 1748 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1749 tfo->fabric_name, 1750 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, 1751 pr_reg->pr_res_generation); 1752 1753 if (len + strlen(buf) >= PAGE_SIZE) 1754 break; 1755 1756 len += sprintf(page+len, "%s", buf); 1757 reg_count++; 1758 } 1759 spin_unlock(&dev->t10_pr.registration_lock); 1760 1761 if (!reg_count) 1762 len += sprintf(page+len, "None\n"); 1763 1764 return len; 1765 } 1766 1767 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page) 1768 { 1769 struct se_device *dev = pr_to_dev(item); 1770 struct t10_pr_registration *pr_reg; 1771 ssize_t len = 0; 1772 1773 spin_lock(&dev->dev_reservation_lock); 1774 pr_reg = dev->dev_pr_res_holder; 1775 if (pr_reg) { 1776 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1777 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 1778 } else { 1779 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1780 } 1781 1782 spin_unlock(&dev->dev_reservation_lock); 1783 return len; 1784 } 1785 1786 static ssize_t target_pr_res_type_show(struct config_item *item, char *page) 1787 { 1788 struct se_device *dev = pr_to_dev(item); 1789 1790 if (!dev->dev_attrib.emulate_pr) 1791 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 1792 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1793 return sprintf(page, "SPC_PASSTHROUGH\n"); 1794 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1795 return sprintf(page, "SPC2_RESERVATIONS\n"); 1796 1797 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 1798 } 1799 1800 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item, 1801 char *page) 1802 { 1803 struct se_device *dev = pr_to_dev(item); 1804 1805 if (!dev->dev_attrib.emulate_pr || 1806 (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 1807 return 0; 1808 1809 return sprintf(page, "APTPL Bit Status: %s\n", 1810 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 1811 } 1812 1813 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item, 1814 char *page) 1815 { 1816 struct se_device *dev = pr_to_dev(item); 1817 1818 if (!dev->dev_attrib.emulate_pr || 1819 (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 1820 return 0; 1821 1822 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 1823 } 1824 1825 enum { 1826 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 1827 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 1828 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 1829 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 1830 }; 1831 1832 static match_table_t tokens = { 1833 {Opt_initiator_fabric, "initiator_fabric=%s"}, 1834 {Opt_initiator_node, "initiator_node=%s"}, 1835 {Opt_initiator_sid, "initiator_sid=%s"}, 1836 {Opt_sa_res_key, "sa_res_key=%s"}, 1837 {Opt_res_holder, "res_holder=%d"}, 1838 {Opt_res_type, "res_type=%d"}, 1839 {Opt_res_scope, "res_scope=%d"}, 1840 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 1841 {Opt_mapped_lun, "mapped_lun=%u"}, 1842 {Opt_target_fabric, "target_fabric=%s"}, 1843 {Opt_target_node, "target_node=%s"}, 1844 {Opt_tpgt, "tpgt=%d"}, 1845 {Opt_port_rtpi, "port_rtpi=%d"}, 1846 {Opt_target_lun, "target_lun=%u"}, 1847 {Opt_err, NULL} 1848 }; 1849 1850 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item, 1851 const char *page, size_t count) 1852 { 1853 struct se_device *dev = pr_to_dev(item); 1854 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 1855 unsigned char *t_fabric = NULL, *t_port = NULL; 1856 char *orig, *ptr, *opts; 1857 substring_t args[MAX_OPT_ARGS]; 1858 unsigned long long tmp_ll; 1859 u64 sa_res_key = 0; 1860 u64 mapped_lun = 0, target_lun = 0; 1861 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 1862 u16 tpgt = 0; 1863 u8 type = 0; 1864 1865 if (!dev->dev_attrib.emulate_pr || 1866 (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 1867 return count; 1868 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1869 return count; 1870 1871 if (dev->export_count) { 1872 pr_debug("Unable to process APTPL metadata while" 1873 " active fabric exports exist\n"); 1874 return -EINVAL; 1875 } 1876 1877 opts = kstrdup(page, GFP_KERNEL); 1878 if (!opts) 1879 return -ENOMEM; 1880 1881 orig = opts; 1882 while ((ptr = strsep(&opts, ",\n")) != NULL) { 1883 if (!*ptr) 1884 continue; 1885 1886 token = match_token(ptr, tokens, args); 1887 switch (token) { 1888 case Opt_initiator_fabric: 1889 i_fabric = match_strdup(args); 1890 if (!i_fabric) { 1891 ret = -ENOMEM; 1892 goto out; 1893 } 1894 break; 1895 case Opt_initiator_node: 1896 i_port = match_strdup(args); 1897 if (!i_port) { 1898 ret = -ENOMEM; 1899 goto out; 1900 } 1901 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 1902 pr_err("APTPL metadata initiator_node=" 1903 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 1904 PR_APTPL_MAX_IPORT_LEN); 1905 ret = -EINVAL; 1906 break; 1907 } 1908 break; 1909 case Opt_initiator_sid: 1910 isid = match_strdup(args); 1911 if (!isid) { 1912 ret = -ENOMEM; 1913 goto out; 1914 } 1915 if (strlen(isid) >= PR_REG_ISID_LEN) { 1916 pr_err("APTPL metadata initiator_isid" 1917 "= exceeds PR_REG_ISID_LEN: %d\n", 1918 PR_REG_ISID_LEN); 1919 ret = -EINVAL; 1920 break; 1921 } 1922 break; 1923 case Opt_sa_res_key: 1924 ret = match_u64(args, &tmp_ll); 1925 if (ret < 0) { 1926 pr_err("kstrtoull() failed for sa_res_key=\n"); 1927 goto out; 1928 } 1929 sa_res_key = (u64)tmp_ll; 1930 break; 1931 /* 1932 * PR APTPL Metadata for Reservation 1933 */ 1934 case Opt_res_holder: 1935 ret = match_int(args, &arg); 1936 if (ret) 1937 goto out; 1938 res_holder = arg; 1939 break; 1940 case Opt_res_type: 1941 ret = match_int(args, &arg); 1942 if (ret) 1943 goto out; 1944 type = (u8)arg; 1945 break; 1946 case Opt_res_scope: 1947 ret = match_int(args, &arg); 1948 if (ret) 1949 goto out; 1950 break; 1951 case Opt_res_all_tg_pt: 1952 ret = match_int(args, &arg); 1953 if (ret) 1954 goto out; 1955 all_tg_pt = (int)arg; 1956 break; 1957 case Opt_mapped_lun: 1958 ret = match_u64(args, &tmp_ll); 1959 if (ret) 1960 goto out; 1961 mapped_lun = (u64)tmp_ll; 1962 break; 1963 /* 1964 * PR APTPL Metadata for Target Port 1965 */ 1966 case Opt_target_fabric: 1967 t_fabric = match_strdup(args); 1968 if (!t_fabric) { 1969 ret = -ENOMEM; 1970 goto out; 1971 } 1972 break; 1973 case Opt_target_node: 1974 t_port = match_strdup(args); 1975 if (!t_port) { 1976 ret = -ENOMEM; 1977 goto out; 1978 } 1979 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 1980 pr_err("APTPL metadata target_node=" 1981 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 1982 PR_APTPL_MAX_TPORT_LEN); 1983 ret = -EINVAL; 1984 break; 1985 } 1986 break; 1987 case Opt_tpgt: 1988 ret = match_int(args, &arg); 1989 if (ret) 1990 goto out; 1991 tpgt = (u16)arg; 1992 break; 1993 case Opt_port_rtpi: 1994 ret = match_int(args, &arg); 1995 if (ret) 1996 goto out; 1997 break; 1998 case Opt_target_lun: 1999 ret = match_u64(args, &tmp_ll); 2000 if (ret) 2001 goto out; 2002 target_lun = (u64)tmp_ll; 2003 break; 2004 default: 2005 break; 2006 } 2007 } 2008 2009 if (!i_port || !t_port || !sa_res_key) { 2010 pr_err("Illegal parameters for APTPL registration\n"); 2011 ret = -EINVAL; 2012 goto out; 2013 } 2014 2015 if (res_holder && !(type)) { 2016 pr_err("Illegal PR type: 0x%02x for reservation" 2017 " holder\n", type); 2018 ret = -EINVAL; 2019 goto out; 2020 } 2021 2022 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, 2023 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 2024 res_holder, all_tg_pt, type); 2025 out: 2026 kfree(i_fabric); 2027 kfree(i_port); 2028 kfree(isid); 2029 kfree(t_fabric); 2030 kfree(t_port); 2031 kfree(orig); 2032 return (ret == 0) ? count : ret; 2033 } 2034 2035 2036 CONFIGFS_ATTR_RO(target_pr_, res_holder); 2037 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts); 2038 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation); 2039 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port); 2040 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts); 2041 CONFIGFS_ATTR_RO(target_pr_, res_pr_type); 2042 CONFIGFS_ATTR_RO(target_pr_, res_type); 2043 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active); 2044 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata); 2045 2046 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 2047 &target_pr_attr_res_holder, 2048 &target_pr_attr_res_pr_all_tgt_pts, 2049 &target_pr_attr_res_pr_generation, 2050 &target_pr_attr_res_pr_holder_tg_port, 2051 &target_pr_attr_res_pr_registered_i_pts, 2052 &target_pr_attr_res_pr_type, 2053 &target_pr_attr_res_type, 2054 &target_pr_attr_res_aptpl_active, 2055 &target_pr_attr_res_aptpl_metadata, 2056 NULL, 2057 }; 2058 2059 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs); 2060 2061 /* End functions for struct config_item_type tb_dev_pr_cit */ 2062 2063 /* Start functions for struct config_item_type tb_dev_cit */ 2064 2065 static inline struct se_device *to_device(struct config_item *item) 2066 { 2067 return container_of(to_config_group(item), struct se_device, dev_group); 2068 } 2069 2070 static ssize_t target_dev_info_show(struct config_item *item, char *page) 2071 { 2072 struct se_device *dev = to_device(item); 2073 int bl = 0; 2074 ssize_t read_bytes = 0; 2075 2076 transport_dump_dev_state(dev, page, &bl); 2077 read_bytes += bl; 2078 read_bytes += dev->transport->show_configfs_dev_params(dev, 2079 page+read_bytes); 2080 return read_bytes; 2081 } 2082 2083 static ssize_t target_dev_control_store(struct config_item *item, 2084 const char *page, size_t count) 2085 { 2086 struct se_device *dev = to_device(item); 2087 2088 return dev->transport->set_configfs_dev_params(dev, page, count); 2089 } 2090 2091 static ssize_t target_dev_alias_show(struct config_item *item, char *page) 2092 { 2093 struct se_device *dev = to_device(item); 2094 2095 if (!(dev->dev_flags & DF_USING_ALIAS)) 2096 return 0; 2097 2098 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); 2099 } 2100 2101 static ssize_t target_dev_alias_store(struct config_item *item, 2102 const char *page, size_t count) 2103 { 2104 struct se_device *dev = to_device(item); 2105 struct se_hba *hba = dev->se_hba; 2106 ssize_t read_bytes; 2107 2108 if (count > (SE_DEV_ALIAS_LEN-1)) { 2109 pr_err("alias count: %d exceeds" 2110 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 2111 SE_DEV_ALIAS_LEN-1); 2112 return -EINVAL; 2113 } 2114 2115 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); 2116 if (!read_bytes) 2117 return -EINVAL; 2118 if (dev->dev_alias[read_bytes - 1] == '\n') 2119 dev->dev_alias[read_bytes - 1] = '\0'; 2120 2121 dev->dev_flags |= DF_USING_ALIAS; 2122 2123 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 2124 config_item_name(&hba->hba_group.cg_item), 2125 config_item_name(&dev->dev_group.cg_item), 2126 dev->dev_alias); 2127 2128 return read_bytes; 2129 } 2130 2131 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page) 2132 { 2133 struct se_device *dev = to_device(item); 2134 2135 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) 2136 return 0; 2137 2138 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); 2139 } 2140 2141 static ssize_t target_dev_udev_path_store(struct config_item *item, 2142 const char *page, size_t count) 2143 { 2144 struct se_device *dev = to_device(item); 2145 struct se_hba *hba = dev->se_hba; 2146 ssize_t read_bytes; 2147 2148 if (count > (SE_UDEV_PATH_LEN-1)) { 2149 pr_err("udev_path count: %d exceeds" 2150 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 2151 SE_UDEV_PATH_LEN-1); 2152 return -EINVAL; 2153 } 2154 2155 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, 2156 "%s", page); 2157 if (!read_bytes) 2158 return -EINVAL; 2159 if (dev->udev_path[read_bytes - 1] == '\n') 2160 dev->udev_path[read_bytes - 1] = '\0'; 2161 2162 dev->dev_flags |= DF_USING_UDEV_PATH; 2163 2164 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 2165 config_item_name(&hba->hba_group.cg_item), 2166 config_item_name(&dev->dev_group.cg_item), 2167 dev->udev_path); 2168 2169 return read_bytes; 2170 } 2171 2172 static ssize_t target_dev_enable_show(struct config_item *item, char *page) 2173 { 2174 struct se_device *dev = to_device(item); 2175 2176 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev)); 2177 } 2178 2179 static ssize_t target_dev_enable_store(struct config_item *item, 2180 const char *page, size_t count) 2181 { 2182 struct se_device *dev = to_device(item); 2183 char *ptr; 2184 int ret; 2185 2186 ptr = strstr(page, "1"); 2187 if (!ptr) { 2188 pr_err("For dev_enable ops, only valid value" 2189 " is \"1\"\n"); 2190 return -EINVAL; 2191 } 2192 2193 ret = target_configure_device(dev); 2194 if (ret) 2195 return ret; 2196 return count; 2197 } 2198 2199 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page) 2200 { 2201 struct se_device *dev = to_device(item); 2202 struct config_item *lu_ci; 2203 struct t10_alua_lu_gp *lu_gp; 2204 struct t10_alua_lu_gp_member *lu_gp_mem; 2205 ssize_t len = 0; 2206 2207 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2208 if (!lu_gp_mem) 2209 return 0; 2210 2211 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2212 lu_gp = lu_gp_mem->lu_gp; 2213 if (lu_gp) { 2214 lu_ci = &lu_gp->lu_gp_group.cg_item; 2215 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 2216 config_item_name(lu_ci), lu_gp->lu_gp_id); 2217 } 2218 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2219 2220 return len; 2221 } 2222 2223 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item, 2224 const char *page, size_t count) 2225 { 2226 struct se_device *dev = to_device(item); 2227 struct se_hba *hba = dev->se_hba; 2228 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 2229 struct t10_alua_lu_gp_member *lu_gp_mem; 2230 unsigned char buf[LU_GROUP_NAME_BUF]; 2231 int move = 0; 2232 2233 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2234 if (!lu_gp_mem) 2235 return count; 2236 2237 if (count > LU_GROUP_NAME_BUF) { 2238 pr_err("ALUA LU Group Alias too large!\n"); 2239 return -EINVAL; 2240 } 2241 memset(buf, 0, LU_GROUP_NAME_BUF); 2242 memcpy(buf, page, count); 2243 /* 2244 * Any ALUA logical unit alias besides "NULL" means we will be 2245 * making a new group association. 2246 */ 2247 if (strcmp(strstrip(buf), "NULL")) { 2248 /* 2249 * core_alua_get_lu_gp_by_name() will increment reference to 2250 * struct t10_alua_lu_gp. This reference is released with 2251 * core_alua_get_lu_gp_by_name below(). 2252 */ 2253 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 2254 if (!lu_gp_new) 2255 return -ENODEV; 2256 } 2257 2258 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2259 lu_gp = lu_gp_mem->lu_gp; 2260 if (lu_gp) { 2261 /* 2262 * Clearing an existing lu_gp association, and replacing 2263 * with NULL 2264 */ 2265 if (!lu_gp_new) { 2266 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 2267 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 2268 " %hu\n", 2269 config_item_name(&hba->hba_group.cg_item), 2270 config_item_name(&dev->dev_group.cg_item), 2271 config_item_name(&lu_gp->lu_gp_group.cg_item), 2272 lu_gp->lu_gp_id); 2273 2274 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2275 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2276 2277 return count; 2278 } 2279 /* 2280 * Removing existing association of lu_gp_mem with lu_gp 2281 */ 2282 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2283 move = 1; 2284 } 2285 /* 2286 * Associate lu_gp_mem with lu_gp_new. 2287 */ 2288 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 2289 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2290 2291 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 2292 " core/alua/lu_gps/%s, ID: %hu\n", 2293 (move) ? "Moving" : "Adding", 2294 config_item_name(&hba->hba_group.cg_item), 2295 config_item_name(&dev->dev_group.cg_item), 2296 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 2297 lu_gp_new->lu_gp_id); 2298 2299 core_alua_put_lu_gp_from_name(lu_gp_new); 2300 return count; 2301 } 2302 2303 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page) 2304 { 2305 struct se_device *dev = to_device(item); 2306 struct t10_alua_lba_map *map; 2307 struct t10_alua_lba_map_member *mem; 2308 char *b = page; 2309 int bl = 0; 2310 char state; 2311 2312 spin_lock(&dev->t10_alua.lba_map_lock); 2313 if (!list_empty(&dev->t10_alua.lba_map_list)) 2314 bl += sprintf(b + bl, "%u %u\n", 2315 dev->t10_alua.lba_map_segment_size, 2316 dev->t10_alua.lba_map_segment_multiplier); 2317 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) { 2318 bl += sprintf(b + bl, "%llu %llu", 2319 map->lba_map_first_lba, map->lba_map_last_lba); 2320 list_for_each_entry(mem, &map->lba_map_mem_list, 2321 lba_map_mem_list) { 2322 switch (mem->lba_map_mem_alua_state) { 2323 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: 2324 state = 'O'; 2325 break; 2326 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: 2327 state = 'A'; 2328 break; 2329 case ALUA_ACCESS_STATE_STANDBY: 2330 state = 'S'; 2331 break; 2332 case ALUA_ACCESS_STATE_UNAVAILABLE: 2333 state = 'U'; 2334 break; 2335 default: 2336 state = '.'; 2337 break; 2338 } 2339 bl += sprintf(b + bl, " %d:%c", 2340 mem->lba_map_mem_alua_pg_id, state); 2341 } 2342 bl += sprintf(b + bl, "\n"); 2343 } 2344 spin_unlock(&dev->t10_alua.lba_map_lock); 2345 return bl; 2346 } 2347 2348 static ssize_t target_dev_lba_map_store(struct config_item *item, 2349 const char *page, size_t count) 2350 { 2351 struct se_device *dev = to_device(item); 2352 struct t10_alua_lba_map *lba_map = NULL; 2353 struct list_head lba_list; 2354 char *map_entries, *orig, *ptr; 2355 char state; 2356 int pg_num = -1, pg; 2357 int ret = 0, num = 0, pg_id, alua_state; 2358 unsigned long start_lba = -1, end_lba = -1; 2359 unsigned long segment_size = -1, segment_mult = -1; 2360 2361 orig = map_entries = kstrdup(page, GFP_KERNEL); 2362 if (!map_entries) 2363 return -ENOMEM; 2364 2365 INIT_LIST_HEAD(&lba_list); 2366 while ((ptr = strsep(&map_entries, "\n")) != NULL) { 2367 if (!*ptr) 2368 continue; 2369 2370 if (num == 0) { 2371 if (sscanf(ptr, "%lu %lu\n", 2372 &segment_size, &segment_mult) != 2) { 2373 pr_err("Invalid line %d\n", num); 2374 ret = -EINVAL; 2375 break; 2376 } 2377 num++; 2378 continue; 2379 } 2380 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) { 2381 pr_err("Invalid line %d\n", num); 2382 ret = -EINVAL; 2383 break; 2384 } 2385 ptr = strchr(ptr, ' '); 2386 if (!ptr) { 2387 pr_err("Invalid line %d, missing end lba\n", num); 2388 ret = -EINVAL; 2389 break; 2390 } 2391 ptr++; 2392 ptr = strchr(ptr, ' '); 2393 if (!ptr) { 2394 pr_err("Invalid line %d, missing state definitions\n", 2395 num); 2396 ret = -EINVAL; 2397 break; 2398 } 2399 ptr++; 2400 lba_map = core_alua_allocate_lba_map(&lba_list, 2401 start_lba, end_lba); 2402 if (IS_ERR(lba_map)) { 2403 ret = PTR_ERR(lba_map); 2404 break; 2405 } 2406 pg = 0; 2407 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) { 2408 switch (state) { 2409 case 'O': 2410 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED; 2411 break; 2412 case 'A': 2413 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED; 2414 break; 2415 case 'S': 2416 alua_state = ALUA_ACCESS_STATE_STANDBY; 2417 break; 2418 case 'U': 2419 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE; 2420 break; 2421 default: 2422 pr_err("Invalid ALUA state '%c'\n", state); 2423 ret = -EINVAL; 2424 goto out; 2425 } 2426 2427 ret = core_alua_allocate_lba_map_mem(lba_map, 2428 pg_id, alua_state); 2429 if (ret) { 2430 pr_err("Invalid target descriptor %d:%c " 2431 "at line %d\n", 2432 pg_id, state, num); 2433 break; 2434 } 2435 pg++; 2436 ptr = strchr(ptr, ' '); 2437 if (ptr) 2438 ptr++; 2439 else 2440 break; 2441 } 2442 if (pg_num == -1) 2443 pg_num = pg; 2444 else if (pg != pg_num) { 2445 pr_err("Only %d from %d port groups definitions " 2446 "at line %d\n", pg, pg_num, num); 2447 ret = -EINVAL; 2448 break; 2449 } 2450 num++; 2451 } 2452 out: 2453 if (ret) { 2454 core_alua_free_lba_map(&lba_list); 2455 count = ret; 2456 } else 2457 core_alua_set_lba_map(dev, &lba_list, 2458 segment_size, segment_mult); 2459 kfree(orig); 2460 return count; 2461 } 2462 2463 CONFIGFS_ATTR_RO(target_dev_, info); 2464 CONFIGFS_ATTR_WO(target_dev_, control); 2465 CONFIGFS_ATTR(target_dev_, alias); 2466 CONFIGFS_ATTR(target_dev_, udev_path); 2467 CONFIGFS_ATTR(target_dev_, enable); 2468 CONFIGFS_ATTR(target_dev_, alua_lu_gp); 2469 CONFIGFS_ATTR(target_dev_, lba_map); 2470 2471 static struct configfs_attribute *target_core_dev_attrs[] = { 2472 &target_dev_attr_info, 2473 &target_dev_attr_control, 2474 &target_dev_attr_alias, 2475 &target_dev_attr_udev_path, 2476 &target_dev_attr_enable, 2477 &target_dev_attr_alua_lu_gp, 2478 &target_dev_attr_lba_map, 2479 NULL, 2480 }; 2481 2482 static void target_core_dev_release(struct config_item *item) 2483 { 2484 struct config_group *dev_cg = to_config_group(item); 2485 struct se_device *dev = 2486 container_of(dev_cg, struct se_device, dev_group); 2487 2488 target_free_device(dev); 2489 } 2490 2491 /* 2492 * Used in target_core_fabric_configfs.c to verify valid se_device symlink 2493 * within target_fabric_port_link() 2494 */ 2495 struct configfs_item_operations target_core_dev_item_ops = { 2496 .release = target_core_dev_release, 2497 }; 2498 2499 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs); 2500 2501 /* End functions for struct config_item_type tb_dev_cit */ 2502 2503 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 2504 2505 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item) 2506 { 2507 return container_of(to_config_group(item), struct t10_alua_lu_gp, 2508 lu_gp_group); 2509 } 2510 2511 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page) 2512 { 2513 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2514 2515 if (!lu_gp->lu_gp_valid_id) 2516 return 0; 2517 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2518 } 2519 2520 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item, 2521 const char *page, size_t count) 2522 { 2523 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2524 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2525 unsigned long lu_gp_id; 2526 int ret; 2527 2528 ret = kstrtoul(page, 0, &lu_gp_id); 2529 if (ret < 0) { 2530 pr_err("kstrtoul() returned %d for" 2531 " lu_gp_id\n", ret); 2532 return ret; 2533 } 2534 if (lu_gp_id > 0x0000ffff) { 2535 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 2536 " 0x0000ffff\n", lu_gp_id); 2537 return -EINVAL; 2538 } 2539 2540 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2541 if (ret < 0) 2542 return -EINVAL; 2543 2544 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 2545 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2546 config_item_name(&alua_lu_gp_cg->cg_item), 2547 lu_gp->lu_gp_id); 2548 2549 return count; 2550 } 2551 2552 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page) 2553 { 2554 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2555 struct se_device *dev; 2556 struct se_hba *hba; 2557 struct t10_alua_lu_gp_member *lu_gp_mem; 2558 ssize_t len = 0, cur_len; 2559 unsigned char buf[LU_GROUP_NAME_BUF]; 2560 2561 memset(buf, 0, LU_GROUP_NAME_BUF); 2562 2563 spin_lock(&lu_gp->lu_gp_lock); 2564 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2565 dev = lu_gp_mem->lu_gp_mem_dev; 2566 hba = dev->se_hba; 2567 2568 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 2569 config_item_name(&hba->hba_group.cg_item), 2570 config_item_name(&dev->dev_group.cg_item)); 2571 cur_len++; /* Extra byte for NULL terminator */ 2572 2573 if ((cur_len + len) > PAGE_SIZE) { 2574 pr_warn("Ran out of lu_gp_show_attr" 2575 "_members buffer\n"); 2576 break; 2577 } 2578 memcpy(page+len, buf, cur_len); 2579 len += cur_len; 2580 } 2581 spin_unlock(&lu_gp->lu_gp_lock); 2582 2583 return len; 2584 } 2585 2586 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id); 2587 CONFIGFS_ATTR_RO(target_lu_gp_, members); 2588 2589 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2590 &target_lu_gp_attr_lu_gp_id, 2591 &target_lu_gp_attr_members, 2592 NULL, 2593 }; 2594 2595 static void target_core_alua_lu_gp_release(struct config_item *item) 2596 { 2597 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2598 struct t10_alua_lu_gp, lu_gp_group); 2599 2600 core_alua_free_lu_gp(lu_gp); 2601 } 2602 2603 static struct configfs_item_operations target_core_alua_lu_gp_ops = { 2604 .release = target_core_alua_lu_gp_release, 2605 }; 2606 2607 static const struct config_item_type target_core_alua_lu_gp_cit = { 2608 .ct_item_ops = &target_core_alua_lu_gp_ops, 2609 .ct_attrs = target_core_alua_lu_gp_attrs, 2610 .ct_owner = THIS_MODULE, 2611 }; 2612 2613 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2614 2615 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2616 2617 static struct config_group *target_core_alua_create_lu_gp( 2618 struct config_group *group, 2619 const char *name) 2620 { 2621 struct t10_alua_lu_gp *lu_gp; 2622 struct config_group *alua_lu_gp_cg = NULL; 2623 struct config_item *alua_lu_gp_ci = NULL; 2624 2625 lu_gp = core_alua_allocate_lu_gp(name, 0); 2626 if (IS_ERR(lu_gp)) 2627 return NULL; 2628 2629 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2630 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2631 2632 config_group_init_type_name(alua_lu_gp_cg, name, 2633 &target_core_alua_lu_gp_cit); 2634 2635 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2636 " Group: core/alua/lu_gps/%s\n", 2637 config_item_name(alua_lu_gp_ci)); 2638 2639 return alua_lu_gp_cg; 2640 2641 } 2642 2643 static void target_core_alua_drop_lu_gp( 2644 struct config_group *group, 2645 struct config_item *item) 2646 { 2647 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2648 struct t10_alua_lu_gp, lu_gp_group); 2649 2650 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2651 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2652 config_item_name(item), lu_gp->lu_gp_id); 2653 /* 2654 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 2655 * -> target_core_alua_lu_gp_release() 2656 */ 2657 config_item_put(item); 2658 } 2659 2660 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2661 .make_group = &target_core_alua_create_lu_gp, 2662 .drop_item = &target_core_alua_drop_lu_gp, 2663 }; 2664 2665 static const struct config_item_type target_core_alua_lu_gps_cit = { 2666 .ct_item_ops = NULL, 2667 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2668 .ct_owner = THIS_MODULE, 2669 }; 2670 2671 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2672 2673 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2674 2675 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item) 2676 { 2677 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp, 2678 tg_pt_gp_group); 2679 } 2680 2681 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item, 2682 char *page) 2683 { 2684 return sprintf(page, "%d\n", 2685 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state); 2686 } 2687 2688 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item, 2689 const char *page, size_t count) 2690 { 2691 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2692 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; 2693 unsigned long tmp; 2694 int new_state, ret; 2695 2696 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2697 pr_err("Unable to do implicit ALUA on non valid" 2698 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id); 2699 return -EINVAL; 2700 } 2701 if (!target_dev_configured(dev)) { 2702 pr_err("Unable to set alua_access_state while device is" 2703 " not configured\n"); 2704 return -ENODEV; 2705 } 2706 2707 ret = kstrtoul(page, 0, &tmp); 2708 if (ret < 0) { 2709 pr_err("Unable to extract new ALUA access state from" 2710 " %s\n", page); 2711 return ret; 2712 } 2713 new_state = (int)tmp; 2714 2715 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) { 2716 pr_err("Unable to process implicit configfs ALUA" 2717 " transition while TPGS_IMPLICIT_ALUA is disabled\n"); 2718 return -EINVAL; 2719 } 2720 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA && 2721 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) { 2722 /* LBA DEPENDENT is only allowed with implicit ALUA */ 2723 pr_err("Unable to process implicit configfs ALUA transition" 2724 " while explicit ALUA management is enabled\n"); 2725 return -EINVAL; 2726 } 2727 2728 ret = core_alua_do_port_transition(tg_pt_gp, dev, 2729 NULL, NULL, new_state, 0); 2730 return (!ret) ? count : -EINVAL; 2731 } 2732 2733 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item, 2734 char *page) 2735 { 2736 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2737 return sprintf(page, "%s\n", 2738 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2739 } 2740 2741 static ssize_t target_tg_pt_gp_alua_access_status_store( 2742 struct config_item *item, const char *page, size_t count) 2743 { 2744 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2745 unsigned long tmp; 2746 int new_status, ret; 2747 2748 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2749 pr_err("Unable to do set ALUA access status on non" 2750 " valid tg_pt_gp ID: %hu\n", 2751 tg_pt_gp->tg_pt_gp_valid_id); 2752 return -EINVAL; 2753 } 2754 2755 ret = kstrtoul(page, 0, &tmp); 2756 if (ret < 0) { 2757 pr_err("Unable to extract new ALUA access status" 2758 " from %s\n", page); 2759 return ret; 2760 } 2761 new_status = (int)tmp; 2762 2763 if ((new_status != ALUA_STATUS_NONE) && 2764 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && 2765 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { 2766 pr_err("Illegal ALUA access status: 0x%02x\n", 2767 new_status); 2768 return -EINVAL; 2769 } 2770 2771 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2772 return count; 2773 } 2774 2775 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item, 2776 char *page) 2777 { 2778 return core_alua_show_access_type(to_tg_pt_gp(item), page); 2779 } 2780 2781 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item, 2782 const char *page, size_t count) 2783 { 2784 return core_alua_store_access_type(to_tg_pt_gp(item), page, count); 2785 } 2786 2787 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \ 2788 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \ 2789 struct config_item *item, char *p) \ 2790 { \ 2791 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 2792 return sprintf(p, "%d\n", \ 2793 !!(t->tg_pt_gp_alua_supported_states & _bit)); \ 2794 } \ 2795 \ 2796 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \ 2797 struct config_item *item, const char *p, size_t c) \ 2798 { \ 2799 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 2800 unsigned long tmp; \ 2801 int ret; \ 2802 \ 2803 if (!t->tg_pt_gp_valid_id) { \ 2804 pr_err("Unable to do set " #_name " ALUA state on non" \ 2805 " valid tg_pt_gp ID: %hu\n", \ 2806 t->tg_pt_gp_valid_id); \ 2807 return -EINVAL; \ 2808 } \ 2809 \ 2810 ret = kstrtoul(p, 0, &tmp); \ 2811 if (ret < 0) { \ 2812 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \ 2813 return -EINVAL; \ 2814 } \ 2815 if (tmp > 1) { \ 2816 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \ 2817 return -EINVAL; \ 2818 } \ 2819 if (tmp) \ 2820 t->tg_pt_gp_alua_supported_states |= _bit; \ 2821 else \ 2822 t->tg_pt_gp_alua_supported_states &= ~_bit; \ 2823 \ 2824 return c; \ 2825 } 2826 2827 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP); 2828 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP); 2829 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP); 2830 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP); 2831 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP); 2832 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP); 2833 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP); 2834 2835 static ssize_t target_tg_pt_gp_alua_write_metadata_show( 2836 struct config_item *item, char *page) 2837 { 2838 return sprintf(page, "%d\n", 2839 to_tg_pt_gp(item)->tg_pt_gp_write_metadata); 2840 } 2841 2842 static ssize_t target_tg_pt_gp_alua_write_metadata_store( 2843 struct config_item *item, const char *page, size_t count) 2844 { 2845 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2846 unsigned long tmp; 2847 int ret; 2848 2849 ret = kstrtoul(page, 0, &tmp); 2850 if (ret < 0) { 2851 pr_err("Unable to extract alua_write_metadata\n"); 2852 return ret; 2853 } 2854 2855 if ((tmp != 0) && (tmp != 1)) { 2856 pr_err("Illegal value for alua_write_metadata:" 2857 " %lu\n", tmp); 2858 return -EINVAL; 2859 } 2860 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 2861 2862 return count; 2863 } 2864 2865 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item, 2866 char *page) 2867 { 2868 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page); 2869 } 2870 2871 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item, 2872 const char *page, size_t count) 2873 { 2874 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page, 2875 count); 2876 } 2877 2878 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item, 2879 char *page) 2880 { 2881 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page); 2882 } 2883 2884 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item, 2885 const char *page, size_t count) 2886 { 2887 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page, 2888 count); 2889 } 2890 2891 static ssize_t target_tg_pt_gp_implicit_trans_secs_show( 2892 struct config_item *item, char *page) 2893 { 2894 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page); 2895 } 2896 2897 static ssize_t target_tg_pt_gp_implicit_trans_secs_store( 2898 struct config_item *item, const char *page, size_t count) 2899 { 2900 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page, 2901 count); 2902 } 2903 2904 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item, 2905 char *page) 2906 { 2907 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page); 2908 } 2909 2910 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item, 2911 const char *page, size_t count) 2912 { 2913 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count); 2914 } 2915 2916 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item, 2917 char *page) 2918 { 2919 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2920 2921 if (!tg_pt_gp->tg_pt_gp_valid_id) 2922 return 0; 2923 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 2924 } 2925 2926 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item, 2927 const char *page, size_t count) 2928 { 2929 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2930 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2931 unsigned long tg_pt_gp_id; 2932 int ret; 2933 2934 ret = kstrtoul(page, 0, &tg_pt_gp_id); 2935 if (ret < 0) { 2936 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n", 2937 page); 2938 return ret; 2939 } 2940 if (tg_pt_gp_id > 0x0000ffff) { 2941 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n", 2942 tg_pt_gp_id); 2943 return -EINVAL; 2944 } 2945 2946 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 2947 if (ret < 0) 2948 return -EINVAL; 2949 2950 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 2951 "core/alua/tg_pt_gps/%s to ID: %hu\n", 2952 config_item_name(&alua_tg_pt_gp_cg->cg_item), 2953 tg_pt_gp->tg_pt_gp_id); 2954 2955 return count; 2956 } 2957 2958 static ssize_t target_tg_pt_gp_members_show(struct config_item *item, 2959 char *page) 2960 { 2961 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2962 struct se_lun *lun; 2963 ssize_t len = 0, cur_len; 2964 unsigned char buf[TG_PT_GROUP_NAME_BUF]; 2965 2966 memset(buf, 0, TG_PT_GROUP_NAME_BUF); 2967 2968 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 2969 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, 2970 lun_tg_pt_gp_link) { 2971 struct se_portal_group *tpg = lun->lun_tpg; 2972 2973 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 2974 "/%s\n", tpg->se_tpg_tfo->fabric_name, 2975 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 2976 tpg->se_tpg_tfo->tpg_get_tag(tpg), 2977 config_item_name(&lun->lun_group.cg_item)); 2978 cur_len++; /* Extra byte for NULL terminator */ 2979 2980 if ((cur_len + len) > PAGE_SIZE) { 2981 pr_warn("Ran out of lu_gp_show_attr" 2982 "_members buffer\n"); 2983 break; 2984 } 2985 memcpy(page+len, buf, cur_len); 2986 len += cur_len; 2987 } 2988 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 2989 2990 return len; 2991 } 2992 2993 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state); 2994 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status); 2995 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type); 2996 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning); 2997 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline); 2998 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent); 2999 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable); 3000 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby); 3001 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized); 3002 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized); 3003 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata); 3004 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs); 3005 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs); 3006 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs); 3007 CONFIGFS_ATTR(target_tg_pt_gp_, preferred); 3008 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id); 3009 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members); 3010 3011 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 3012 &target_tg_pt_gp_attr_alua_access_state, 3013 &target_tg_pt_gp_attr_alua_access_status, 3014 &target_tg_pt_gp_attr_alua_access_type, 3015 &target_tg_pt_gp_attr_alua_support_transitioning, 3016 &target_tg_pt_gp_attr_alua_support_offline, 3017 &target_tg_pt_gp_attr_alua_support_lba_dependent, 3018 &target_tg_pt_gp_attr_alua_support_unavailable, 3019 &target_tg_pt_gp_attr_alua_support_standby, 3020 &target_tg_pt_gp_attr_alua_support_active_nonoptimized, 3021 &target_tg_pt_gp_attr_alua_support_active_optimized, 3022 &target_tg_pt_gp_attr_alua_write_metadata, 3023 &target_tg_pt_gp_attr_nonop_delay_msecs, 3024 &target_tg_pt_gp_attr_trans_delay_msecs, 3025 &target_tg_pt_gp_attr_implicit_trans_secs, 3026 &target_tg_pt_gp_attr_preferred, 3027 &target_tg_pt_gp_attr_tg_pt_gp_id, 3028 &target_tg_pt_gp_attr_members, 3029 NULL, 3030 }; 3031 3032 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 3033 { 3034 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3035 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3036 3037 core_alua_free_tg_pt_gp(tg_pt_gp); 3038 } 3039 3040 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 3041 .release = target_core_alua_tg_pt_gp_release, 3042 }; 3043 3044 static const struct config_item_type target_core_alua_tg_pt_gp_cit = { 3045 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 3046 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 3047 .ct_owner = THIS_MODULE, 3048 }; 3049 3050 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 3051 3052 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3053 3054 static struct config_group *target_core_alua_create_tg_pt_gp( 3055 struct config_group *group, 3056 const char *name) 3057 { 3058 struct t10_alua *alua = container_of(group, struct t10_alua, 3059 alua_tg_pt_gps_group); 3060 struct t10_alua_tg_pt_gp *tg_pt_gp; 3061 struct config_group *alua_tg_pt_gp_cg = NULL; 3062 struct config_item *alua_tg_pt_gp_ci = NULL; 3063 3064 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0); 3065 if (!tg_pt_gp) 3066 return NULL; 3067 3068 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 3069 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 3070 3071 config_group_init_type_name(alua_tg_pt_gp_cg, name, 3072 &target_core_alua_tg_pt_gp_cit); 3073 3074 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 3075 " Group: alua/tg_pt_gps/%s\n", 3076 config_item_name(alua_tg_pt_gp_ci)); 3077 3078 return alua_tg_pt_gp_cg; 3079 } 3080 3081 static void target_core_alua_drop_tg_pt_gp( 3082 struct config_group *group, 3083 struct config_item *item) 3084 { 3085 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3086 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3087 3088 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 3089 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 3090 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 3091 /* 3092 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 3093 * -> target_core_alua_tg_pt_gp_release(). 3094 */ 3095 config_item_put(item); 3096 } 3097 3098 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 3099 .make_group = &target_core_alua_create_tg_pt_gp, 3100 .drop_item = &target_core_alua_drop_tg_pt_gp, 3101 }; 3102 3103 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL); 3104 3105 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3106 3107 /* Start functions for struct config_item_type target_core_alua_cit */ 3108 3109 /* 3110 * target_core_alua_cit is a ConfigFS group that lives under 3111 * /sys/kernel/config/target/core/alua. There are default groups 3112 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 3113 * target_core_alua_cit in target_core_init_configfs() below. 3114 */ 3115 static const struct config_item_type target_core_alua_cit = { 3116 .ct_item_ops = NULL, 3117 .ct_attrs = NULL, 3118 .ct_owner = THIS_MODULE, 3119 }; 3120 3121 /* End functions for struct config_item_type target_core_alua_cit */ 3122 3123 /* Start functions for struct config_item_type tb_dev_stat_cit */ 3124 3125 static struct config_group *target_core_stat_mkdir( 3126 struct config_group *group, 3127 const char *name) 3128 { 3129 return ERR_PTR(-ENOSYS); 3130 } 3131 3132 static void target_core_stat_rmdir( 3133 struct config_group *group, 3134 struct config_item *item) 3135 { 3136 return; 3137 } 3138 3139 static struct configfs_group_operations target_core_stat_group_ops = { 3140 .make_group = &target_core_stat_mkdir, 3141 .drop_item = &target_core_stat_rmdir, 3142 }; 3143 3144 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL); 3145 3146 /* End functions for struct config_item_type tb_dev_stat_cit */ 3147 3148 /* Start functions for struct config_item_type target_core_hba_cit */ 3149 3150 static struct config_group *target_core_make_subdev( 3151 struct config_group *group, 3152 const char *name) 3153 { 3154 struct t10_alua_tg_pt_gp *tg_pt_gp; 3155 struct config_item *hba_ci = &group->cg_item; 3156 struct se_hba *hba = item_to_hba(hba_ci); 3157 struct target_backend *tb = hba->backend; 3158 struct se_device *dev; 3159 int errno = -ENOMEM, ret; 3160 3161 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 3162 if (ret) 3163 return ERR_PTR(ret); 3164 3165 dev = target_alloc_device(hba, name); 3166 if (!dev) 3167 goto out_unlock; 3168 3169 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit); 3170 3171 config_group_init_type_name(&dev->dev_action_group, "action", 3172 &tb->tb_dev_action_cit); 3173 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group); 3174 3175 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib", 3176 &tb->tb_dev_attrib_cit); 3177 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group); 3178 3179 config_group_init_type_name(&dev->dev_pr_group, "pr", 3180 &tb->tb_dev_pr_cit); 3181 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group); 3182 3183 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn", 3184 &tb->tb_dev_wwn_cit); 3185 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group, 3186 &dev->dev_group); 3187 3188 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group, 3189 "alua", &tb->tb_dev_alua_tg_pt_gps_cit); 3190 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group, 3191 &dev->dev_group); 3192 3193 config_group_init_type_name(&dev->dev_stat_grps.stat_group, 3194 "statistics", &tb->tb_dev_stat_cit); 3195 configfs_add_default_group(&dev->dev_stat_grps.stat_group, 3196 &dev->dev_group); 3197 3198 /* 3199 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 3200 */ 3201 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1); 3202 if (!tg_pt_gp) 3203 goto out_free_device; 3204 dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 3205 3206 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 3207 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 3208 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group, 3209 &dev->t10_alua.alua_tg_pt_gps_group); 3210 3211 /* 3212 * Add core/$HBA/$DEV/statistics/ default groups 3213 */ 3214 target_stat_setup_dev_default_groups(dev); 3215 3216 mutex_unlock(&hba->hba_access_mutex); 3217 return &dev->dev_group; 3218 3219 out_free_device: 3220 target_free_device(dev); 3221 out_unlock: 3222 mutex_unlock(&hba->hba_access_mutex); 3223 return ERR_PTR(errno); 3224 } 3225 3226 static void target_core_drop_subdev( 3227 struct config_group *group, 3228 struct config_item *item) 3229 { 3230 struct config_group *dev_cg = to_config_group(item); 3231 struct se_device *dev = 3232 container_of(dev_cg, struct se_device, dev_group); 3233 struct se_hba *hba; 3234 3235 hba = item_to_hba(&dev->se_hba->hba_group.cg_item); 3236 3237 mutex_lock(&hba->hba_access_mutex); 3238 3239 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group); 3240 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group); 3241 3242 /* 3243 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 3244 * directly from target_core_alua_tg_pt_gp_release(). 3245 */ 3246 dev->t10_alua.default_tg_pt_gp = NULL; 3247 3248 configfs_remove_default_groups(dev_cg); 3249 3250 /* 3251 * se_dev is released from target_core_dev_item_ops->release() 3252 */ 3253 config_item_put(item); 3254 mutex_unlock(&hba->hba_access_mutex); 3255 } 3256 3257 static struct configfs_group_operations target_core_hba_group_ops = { 3258 .make_group = target_core_make_subdev, 3259 .drop_item = target_core_drop_subdev, 3260 }; 3261 3262 3263 static inline struct se_hba *to_hba(struct config_item *item) 3264 { 3265 return container_of(to_config_group(item), struct se_hba, hba_group); 3266 } 3267 3268 static ssize_t target_hba_info_show(struct config_item *item, char *page) 3269 { 3270 struct se_hba *hba = to_hba(item); 3271 3272 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 3273 hba->hba_id, hba->backend->ops->name, 3274 TARGET_CORE_VERSION); 3275 } 3276 3277 static ssize_t target_hba_mode_show(struct config_item *item, char *page) 3278 { 3279 struct se_hba *hba = to_hba(item); 3280 int hba_mode = 0; 3281 3282 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 3283 hba_mode = 1; 3284 3285 return sprintf(page, "%d\n", hba_mode); 3286 } 3287 3288 static ssize_t target_hba_mode_store(struct config_item *item, 3289 const char *page, size_t count) 3290 { 3291 struct se_hba *hba = to_hba(item); 3292 unsigned long mode_flag; 3293 int ret; 3294 3295 if (hba->backend->ops->pmode_enable_hba == NULL) 3296 return -EINVAL; 3297 3298 ret = kstrtoul(page, 0, &mode_flag); 3299 if (ret < 0) { 3300 pr_err("Unable to extract hba mode flag: %d\n", ret); 3301 return ret; 3302 } 3303 3304 if (hba->dev_count) { 3305 pr_err("Unable to set hba_mode with active devices\n"); 3306 return -EINVAL; 3307 } 3308 3309 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag); 3310 if (ret < 0) 3311 return -EINVAL; 3312 if (ret > 0) 3313 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 3314 else if (ret == 0) 3315 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 3316 3317 return count; 3318 } 3319 3320 CONFIGFS_ATTR_RO(target_, hba_info); 3321 CONFIGFS_ATTR(target_, hba_mode); 3322 3323 static void target_core_hba_release(struct config_item *item) 3324 { 3325 struct se_hba *hba = container_of(to_config_group(item), 3326 struct se_hba, hba_group); 3327 core_delete_hba(hba); 3328 } 3329 3330 static struct configfs_attribute *target_core_hba_attrs[] = { 3331 &target_attr_hba_info, 3332 &target_attr_hba_mode, 3333 NULL, 3334 }; 3335 3336 static struct configfs_item_operations target_core_hba_item_ops = { 3337 .release = target_core_hba_release, 3338 }; 3339 3340 static const struct config_item_type target_core_hba_cit = { 3341 .ct_item_ops = &target_core_hba_item_ops, 3342 .ct_group_ops = &target_core_hba_group_ops, 3343 .ct_attrs = target_core_hba_attrs, 3344 .ct_owner = THIS_MODULE, 3345 }; 3346 3347 static struct config_group *target_core_call_addhbatotarget( 3348 struct config_group *group, 3349 const char *name) 3350 { 3351 char *se_plugin_str, *str, *str2; 3352 struct se_hba *hba; 3353 char buf[TARGET_CORE_NAME_MAX_LEN]; 3354 unsigned long plugin_dep_id = 0; 3355 int ret; 3356 3357 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN); 3358 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 3359 pr_err("Passed *name strlen(): %d exceeds" 3360 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 3361 TARGET_CORE_NAME_MAX_LEN); 3362 return ERR_PTR(-ENAMETOOLONG); 3363 } 3364 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 3365 3366 str = strstr(buf, "_"); 3367 if (!str) { 3368 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 3369 return ERR_PTR(-EINVAL); 3370 } 3371 se_plugin_str = buf; 3372 /* 3373 * Special case for subsystem plugins that have "_" in their names. 3374 * Namely rd_direct and rd_mcp.. 3375 */ 3376 str2 = strstr(str+1, "_"); 3377 if (str2) { 3378 *str2 = '\0'; /* Terminate for *se_plugin_str */ 3379 str2++; /* Skip to start of plugin dependent ID */ 3380 str = str2; 3381 } else { 3382 *str = '\0'; /* Terminate for *se_plugin_str */ 3383 str++; /* Skip to start of plugin dependent ID */ 3384 } 3385 3386 ret = kstrtoul(str, 0, &plugin_dep_id); 3387 if (ret < 0) { 3388 pr_err("kstrtoul() returned %d for" 3389 " plugin_dep_id\n", ret); 3390 return ERR_PTR(ret); 3391 } 3392 /* 3393 * Load up TCM subsystem plugins if they have not already been loaded. 3394 */ 3395 transport_subsystem_check_init(); 3396 3397 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 3398 if (IS_ERR(hba)) 3399 return ERR_CAST(hba); 3400 3401 config_group_init_type_name(&hba->hba_group, name, 3402 &target_core_hba_cit); 3403 3404 return &hba->hba_group; 3405 } 3406 3407 static void target_core_call_delhbafromtarget( 3408 struct config_group *group, 3409 struct config_item *item) 3410 { 3411 /* 3412 * core_delete_hba() is called from target_core_hba_item_ops->release() 3413 * -> target_core_hba_release() 3414 */ 3415 config_item_put(item); 3416 } 3417 3418 static struct configfs_group_operations target_core_group_ops = { 3419 .make_group = target_core_call_addhbatotarget, 3420 .drop_item = target_core_call_delhbafromtarget, 3421 }; 3422 3423 static const struct config_item_type target_core_cit = { 3424 .ct_item_ops = NULL, 3425 .ct_group_ops = &target_core_group_ops, 3426 .ct_attrs = NULL, 3427 .ct_owner = THIS_MODULE, 3428 }; 3429 3430 /* Stop functions for struct config_item_type target_core_hba_cit */ 3431 3432 void target_setup_backend_cits(struct target_backend *tb) 3433 { 3434 target_core_setup_dev_cit(tb); 3435 target_core_setup_dev_action_cit(tb); 3436 target_core_setup_dev_attrib_cit(tb); 3437 target_core_setup_dev_pr_cit(tb); 3438 target_core_setup_dev_wwn_cit(tb); 3439 target_core_setup_dev_alua_tg_pt_gps_cit(tb); 3440 target_core_setup_dev_stat_cit(tb); 3441 } 3442 3443 static void target_init_dbroot(void) 3444 { 3445 struct file *fp; 3446 3447 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED); 3448 fp = filp_open(db_root_stage, O_RDONLY, 0); 3449 if (IS_ERR(fp)) { 3450 pr_err("db_root: cannot open: %s\n", db_root_stage); 3451 return; 3452 } 3453 if (!S_ISDIR(file_inode(fp)->i_mode)) { 3454 filp_close(fp, NULL); 3455 pr_err("db_root: not a valid directory: %s\n", db_root_stage); 3456 return; 3457 } 3458 filp_close(fp, NULL); 3459 3460 strncpy(db_root, db_root_stage, DB_ROOT_LEN); 3461 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); 3462 } 3463 3464 static int __init target_core_init_configfs(void) 3465 { 3466 struct configfs_subsystem *subsys = &target_core_fabrics; 3467 struct t10_alua_lu_gp *lu_gp; 3468 int ret; 3469 3470 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 3471 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3472 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3473 3474 config_group_init(&subsys->su_group); 3475 mutex_init(&subsys->su_mutex); 3476 3477 ret = init_se_kmem_caches(); 3478 if (ret < 0) 3479 return ret; 3480 /* 3481 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3482 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3483 */ 3484 config_group_init_type_name(&target_core_hbagroup, "core", 3485 &target_core_cit); 3486 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group); 3487 3488 /* 3489 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3490 */ 3491 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit); 3492 configfs_add_default_group(&alua_group, &target_core_hbagroup); 3493 3494 /* 3495 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3496 * groups under /sys/kernel/config/target/core/alua/ 3497 */ 3498 config_group_init_type_name(&alua_lu_gps_group, "lu_gps", 3499 &target_core_alua_lu_gps_cit); 3500 configfs_add_default_group(&alua_lu_gps_group, &alua_group); 3501 3502 /* 3503 * Add core/alua/lu_gps/default_lu_gp 3504 */ 3505 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3506 if (IS_ERR(lu_gp)) { 3507 ret = -ENOMEM; 3508 goto out_global; 3509 } 3510 3511 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3512 &target_core_alua_lu_gp_cit); 3513 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group); 3514 3515 default_lu_gp = lu_gp; 3516 3517 /* 3518 * Register the target_core_mod subsystem with configfs. 3519 */ 3520 ret = configfs_register_subsystem(subsys); 3521 if (ret < 0) { 3522 pr_err("Error %d while registering subsystem %s\n", 3523 ret, subsys->su_group.cg_item.ci_namebuf); 3524 goto out_global; 3525 } 3526 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 3527 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s" 3528 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3529 /* 3530 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3531 */ 3532 ret = rd_module_init(); 3533 if (ret < 0) 3534 goto out; 3535 3536 ret = core_dev_setup_virtual_lun0(); 3537 if (ret < 0) 3538 goto out; 3539 3540 ret = target_xcopy_setup_pt(); 3541 if (ret < 0) 3542 goto out; 3543 3544 target_init_dbroot(); 3545 3546 return 0; 3547 3548 out: 3549 configfs_unregister_subsystem(subsys); 3550 core_dev_release_virtual_lun0(); 3551 rd_module_exit(); 3552 out_global: 3553 if (default_lu_gp) { 3554 core_alua_free_lu_gp(default_lu_gp); 3555 default_lu_gp = NULL; 3556 } 3557 release_se_kmem_caches(); 3558 return ret; 3559 } 3560 3561 static void __exit target_core_exit_configfs(void) 3562 { 3563 configfs_remove_default_groups(&alua_lu_gps_group); 3564 configfs_remove_default_groups(&alua_group); 3565 configfs_remove_default_groups(&target_core_hbagroup); 3566 3567 /* 3568 * We expect subsys->su_group.default_groups to be released 3569 * by configfs subsystem provider logic.. 3570 */ 3571 configfs_unregister_subsystem(&target_core_fabrics); 3572 3573 core_alua_free_lu_gp(default_lu_gp); 3574 default_lu_gp = NULL; 3575 3576 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3577 " Infrastructure\n"); 3578 3579 core_dev_release_virtual_lun0(); 3580 rd_module_exit(); 3581 target_xcopy_release_pt(); 3582 release_se_kmem_caches(); 3583 } 3584 3585 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3586 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3587 MODULE_LICENSE("GPL"); 3588 3589 module_init(target_core_init_configfs); 3590 module_exit(target_core_exit_configfs); 3591