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_session *sess = dev->reservation_holder; 1628 struct se_node_acl *se_nacl; 1629 ssize_t len; 1630 1631 if (sess) { 1632 se_nacl = sess->se_node_acl; 1633 len = sprintf(page, 1634 "SPC-2 Reservation: %s Initiator: %s\n", 1635 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1636 se_nacl->initiatorname); 1637 } else { 1638 len = sprintf(page, "No SPC-2 Reservation holder\n"); 1639 } 1640 return len; 1641 } 1642 1643 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page) 1644 { 1645 struct se_device *dev = pr_to_dev(item); 1646 int ret; 1647 1648 if (!dev->dev_attrib.emulate_pr) 1649 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 1650 1651 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1652 return sprintf(page, "Passthrough\n"); 1653 1654 spin_lock(&dev->dev_reservation_lock); 1655 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1656 ret = target_core_dev_pr_show_spc2_res(dev, page); 1657 else 1658 ret = target_core_dev_pr_show_spc3_res(dev, page); 1659 spin_unlock(&dev->dev_reservation_lock); 1660 return ret; 1661 } 1662 1663 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item, 1664 char *page) 1665 { 1666 struct se_device *dev = pr_to_dev(item); 1667 ssize_t len = 0; 1668 1669 spin_lock(&dev->dev_reservation_lock); 1670 if (!dev->dev_pr_res_holder) { 1671 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1672 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { 1673 len = sprintf(page, "SPC-3 Reservation: All Target" 1674 " Ports registration\n"); 1675 } else { 1676 len = sprintf(page, "SPC-3 Reservation: Single" 1677 " Target Port registration\n"); 1678 } 1679 1680 spin_unlock(&dev->dev_reservation_lock); 1681 return len; 1682 } 1683 1684 static ssize_t target_pr_res_pr_generation_show(struct config_item *item, 1685 char *page) 1686 { 1687 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation); 1688 } 1689 1690 1691 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item, 1692 char *page) 1693 { 1694 struct se_device *dev = pr_to_dev(item); 1695 struct se_node_acl *se_nacl; 1696 struct se_portal_group *se_tpg; 1697 struct t10_pr_registration *pr_reg; 1698 const struct target_core_fabric_ops *tfo; 1699 ssize_t len = 0; 1700 1701 spin_lock(&dev->dev_reservation_lock); 1702 pr_reg = dev->dev_pr_res_holder; 1703 if (!pr_reg) { 1704 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1705 goto out_unlock; 1706 } 1707 1708 se_nacl = pr_reg->pr_reg_nacl; 1709 se_tpg = se_nacl->se_tpg; 1710 tfo = se_tpg->se_tpg_tfo; 1711 1712 len += sprintf(page+len, "SPC-3 Reservation: %s" 1713 " Target Node Endpoint: %s\n", tfo->fabric_name, 1714 tfo->tpg_get_wwn(se_tpg)); 1715 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1716 " Identifier Tag: %hu %s Portal Group Tag: %hu" 1717 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi, 1718 tfo->fabric_name, tfo->tpg_get_tag(se_tpg), 1719 tfo->fabric_name, pr_reg->pr_aptpl_target_lun); 1720 1721 out_unlock: 1722 spin_unlock(&dev->dev_reservation_lock); 1723 return len; 1724 } 1725 1726 1727 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item, 1728 char *page) 1729 { 1730 struct se_device *dev = pr_to_dev(item); 1731 const struct target_core_fabric_ops *tfo; 1732 struct t10_pr_registration *pr_reg; 1733 unsigned char buf[384]; 1734 char i_buf[PR_REG_ISID_ID_LEN]; 1735 ssize_t len = 0; 1736 int reg_count = 0; 1737 1738 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1739 1740 spin_lock(&dev->t10_pr.registration_lock); 1741 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1742 pr_reg_list) { 1743 1744 memset(buf, 0, 384); 1745 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1746 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1747 core_pr_dump_initiator_port(pr_reg, i_buf, 1748 PR_REG_ISID_ID_LEN); 1749 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1750 tfo->fabric_name, 1751 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, 1752 pr_reg->pr_res_generation); 1753 1754 if (len + strlen(buf) >= PAGE_SIZE) 1755 break; 1756 1757 len += sprintf(page+len, "%s", buf); 1758 reg_count++; 1759 } 1760 spin_unlock(&dev->t10_pr.registration_lock); 1761 1762 if (!reg_count) 1763 len += sprintf(page+len, "None\n"); 1764 1765 return len; 1766 } 1767 1768 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page) 1769 { 1770 struct se_device *dev = pr_to_dev(item); 1771 struct t10_pr_registration *pr_reg; 1772 ssize_t len = 0; 1773 1774 spin_lock(&dev->dev_reservation_lock); 1775 pr_reg = dev->dev_pr_res_holder; 1776 if (pr_reg) { 1777 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1778 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 1779 } else { 1780 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1781 } 1782 1783 spin_unlock(&dev->dev_reservation_lock); 1784 return len; 1785 } 1786 1787 static ssize_t target_pr_res_type_show(struct config_item *item, char *page) 1788 { 1789 struct se_device *dev = pr_to_dev(item); 1790 1791 if (!dev->dev_attrib.emulate_pr) 1792 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 1793 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1794 return sprintf(page, "SPC_PASSTHROUGH\n"); 1795 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1796 return sprintf(page, "SPC2_RESERVATIONS\n"); 1797 1798 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 1799 } 1800 1801 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item, 1802 char *page) 1803 { 1804 struct se_device *dev = pr_to_dev(item); 1805 1806 if (!dev->dev_attrib.emulate_pr || 1807 (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 1808 return 0; 1809 1810 return sprintf(page, "APTPL Bit Status: %s\n", 1811 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 1812 } 1813 1814 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item, 1815 char *page) 1816 { 1817 struct se_device *dev = pr_to_dev(item); 1818 1819 if (!dev->dev_attrib.emulate_pr || 1820 (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 1821 return 0; 1822 1823 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 1824 } 1825 1826 enum { 1827 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 1828 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 1829 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 1830 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 1831 }; 1832 1833 static match_table_t tokens = { 1834 {Opt_initiator_fabric, "initiator_fabric=%s"}, 1835 {Opt_initiator_node, "initiator_node=%s"}, 1836 {Opt_initiator_sid, "initiator_sid=%s"}, 1837 {Opt_sa_res_key, "sa_res_key=%s"}, 1838 {Opt_res_holder, "res_holder=%d"}, 1839 {Opt_res_type, "res_type=%d"}, 1840 {Opt_res_scope, "res_scope=%d"}, 1841 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 1842 {Opt_mapped_lun, "mapped_lun=%u"}, 1843 {Opt_target_fabric, "target_fabric=%s"}, 1844 {Opt_target_node, "target_node=%s"}, 1845 {Opt_tpgt, "tpgt=%d"}, 1846 {Opt_port_rtpi, "port_rtpi=%d"}, 1847 {Opt_target_lun, "target_lun=%u"}, 1848 {Opt_err, NULL} 1849 }; 1850 1851 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item, 1852 const char *page, size_t count) 1853 { 1854 struct se_device *dev = pr_to_dev(item); 1855 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 1856 unsigned char *t_fabric = NULL, *t_port = NULL; 1857 char *orig, *ptr, *opts; 1858 substring_t args[MAX_OPT_ARGS]; 1859 unsigned long long tmp_ll; 1860 u64 sa_res_key = 0; 1861 u64 mapped_lun = 0, target_lun = 0; 1862 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 1863 u16 tpgt = 0; 1864 u8 type = 0; 1865 1866 if (!dev->dev_attrib.emulate_pr || 1867 (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 1868 return count; 1869 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1870 return count; 1871 1872 if (dev->export_count) { 1873 pr_debug("Unable to process APTPL metadata while" 1874 " active fabric exports exist\n"); 1875 return -EINVAL; 1876 } 1877 1878 opts = kstrdup(page, GFP_KERNEL); 1879 if (!opts) 1880 return -ENOMEM; 1881 1882 orig = opts; 1883 while ((ptr = strsep(&opts, ",\n")) != NULL) { 1884 if (!*ptr) 1885 continue; 1886 1887 token = match_token(ptr, tokens, args); 1888 switch (token) { 1889 case Opt_initiator_fabric: 1890 i_fabric = match_strdup(args); 1891 if (!i_fabric) { 1892 ret = -ENOMEM; 1893 goto out; 1894 } 1895 break; 1896 case Opt_initiator_node: 1897 i_port = match_strdup(args); 1898 if (!i_port) { 1899 ret = -ENOMEM; 1900 goto out; 1901 } 1902 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 1903 pr_err("APTPL metadata initiator_node=" 1904 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 1905 PR_APTPL_MAX_IPORT_LEN); 1906 ret = -EINVAL; 1907 break; 1908 } 1909 break; 1910 case Opt_initiator_sid: 1911 isid = match_strdup(args); 1912 if (!isid) { 1913 ret = -ENOMEM; 1914 goto out; 1915 } 1916 if (strlen(isid) >= PR_REG_ISID_LEN) { 1917 pr_err("APTPL metadata initiator_isid" 1918 "= exceeds PR_REG_ISID_LEN: %d\n", 1919 PR_REG_ISID_LEN); 1920 ret = -EINVAL; 1921 break; 1922 } 1923 break; 1924 case Opt_sa_res_key: 1925 ret = match_u64(args, &tmp_ll); 1926 if (ret < 0) { 1927 pr_err("kstrtoull() failed for sa_res_key=\n"); 1928 goto out; 1929 } 1930 sa_res_key = (u64)tmp_ll; 1931 break; 1932 /* 1933 * PR APTPL Metadata for Reservation 1934 */ 1935 case Opt_res_holder: 1936 ret = match_int(args, &arg); 1937 if (ret) 1938 goto out; 1939 res_holder = arg; 1940 break; 1941 case Opt_res_type: 1942 ret = match_int(args, &arg); 1943 if (ret) 1944 goto out; 1945 type = (u8)arg; 1946 break; 1947 case Opt_res_scope: 1948 ret = match_int(args, &arg); 1949 if (ret) 1950 goto out; 1951 break; 1952 case Opt_res_all_tg_pt: 1953 ret = match_int(args, &arg); 1954 if (ret) 1955 goto out; 1956 all_tg_pt = (int)arg; 1957 break; 1958 case Opt_mapped_lun: 1959 ret = match_u64(args, &tmp_ll); 1960 if (ret) 1961 goto out; 1962 mapped_lun = (u64)tmp_ll; 1963 break; 1964 /* 1965 * PR APTPL Metadata for Target Port 1966 */ 1967 case Opt_target_fabric: 1968 t_fabric = match_strdup(args); 1969 if (!t_fabric) { 1970 ret = -ENOMEM; 1971 goto out; 1972 } 1973 break; 1974 case Opt_target_node: 1975 t_port = match_strdup(args); 1976 if (!t_port) { 1977 ret = -ENOMEM; 1978 goto out; 1979 } 1980 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 1981 pr_err("APTPL metadata target_node=" 1982 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 1983 PR_APTPL_MAX_TPORT_LEN); 1984 ret = -EINVAL; 1985 break; 1986 } 1987 break; 1988 case Opt_tpgt: 1989 ret = match_int(args, &arg); 1990 if (ret) 1991 goto out; 1992 tpgt = (u16)arg; 1993 break; 1994 case Opt_port_rtpi: 1995 ret = match_int(args, &arg); 1996 if (ret) 1997 goto out; 1998 break; 1999 case Opt_target_lun: 2000 ret = match_u64(args, &tmp_ll); 2001 if (ret) 2002 goto out; 2003 target_lun = (u64)tmp_ll; 2004 break; 2005 default: 2006 break; 2007 } 2008 } 2009 2010 if (!i_port || !t_port || !sa_res_key) { 2011 pr_err("Illegal parameters for APTPL registration\n"); 2012 ret = -EINVAL; 2013 goto out; 2014 } 2015 2016 if (res_holder && !(type)) { 2017 pr_err("Illegal PR type: 0x%02x for reservation" 2018 " holder\n", type); 2019 ret = -EINVAL; 2020 goto out; 2021 } 2022 2023 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, 2024 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 2025 res_holder, all_tg_pt, type); 2026 out: 2027 kfree(i_fabric); 2028 kfree(i_port); 2029 kfree(isid); 2030 kfree(t_fabric); 2031 kfree(t_port); 2032 kfree(orig); 2033 return (ret == 0) ? count : ret; 2034 } 2035 2036 2037 CONFIGFS_ATTR_RO(target_pr_, res_holder); 2038 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts); 2039 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation); 2040 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port); 2041 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts); 2042 CONFIGFS_ATTR_RO(target_pr_, res_pr_type); 2043 CONFIGFS_ATTR_RO(target_pr_, res_type); 2044 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active); 2045 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata); 2046 2047 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 2048 &target_pr_attr_res_holder, 2049 &target_pr_attr_res_pr_all_tgt_pts, 2050 &target_pr_attr_res_pr_generation, 2051 &target_pr_attr_res_pr_holder_tg_port, 2052 &target_pr_attr_res_pr_registered_i_pts, 2053 &target_pr_attr_res_pr_type, 2054 &target_pr_attr_res_type, 2055 &target_pr_attr_res_aptpl_active, 2056 &target_pr_attr_res_aptpl_metadata, 2057 NULL, 2058 }; 2059 2060 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs); 2061 2062 /* End functions for struct config_item_type tb_dev_pr_cit */ 2063 2064 /* Start functions for struct config_item_type tb_dev_cit */ 2065 2066 static inline struct se_device *to_device(struct config_item *item) 2067 { 2068 return container_of(to_config_group(item), struct se_device, dev_group); 2069 } 2070 2071 static ssize_t target_dev_info_show(struct config_item *item, char *page) 2072 { 2073 struct se_device *dev = to_device(item); 2074 int bl = 0; 2075 ssize_t read_bytes = 0; 2076 2077 transport_dump_dev_state(dev, page, &bl); 2078 read_bytes += bl; 2079 read_bytes += dev->transport->show_configfs_dev_params(dev, 2080 page+read_bytes); 2081 return read_bytes; 2082 } 2083 2084 static ssize_t target_dev_control_store(struct config_item *item, 2085 const char *page, size_t count) 2086 { 2087 struct se_device *dev = to_device(item); 2088 2089 return dev->transport->set_configfs_dev_params(dev, page, count); 2090 } 2091 2092 static ssize_t target_dev_alias_show(struct config_item *item, char *page) 2093 { 2094 struct se_device *dev = to_device(item); 2095 2096 if (!(dev->dev_flags & DF_USING_ALIAS)) 2097 return 0; 2098 2099 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); 2100 } 2101 2102 static ssize_t target_dev_alias_store(struct config_item *item, 2103 const char *page, size_t count) 2104 { 2105 struct se_device *dev = to_device(item); 2106 struct se_hba *hba = dev->se_hba; 2107 ssize_t read_bytes; 2108 2109 if (count > (SE_DEV_ALIAS_LEN-1)) { 2110 pr_err("alias count: %d exceeds" 2111 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 2112 SE_DEV_ALIAS_LEN-1); 2113 return -EINVAL; 2114 } 2115 2116 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); 2117 if (!read_bytes) 2118 return -EINVAL; 2119 if (dev->dev_alias[read_bytes - 1] == '\n') 2120 dev->dev_alias[read_bytes - 1] = '\0'; 2121 2122 dev->dev_flags |= DF_USING_ALIAS; 2123 2124 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 2125 config_item_name(&hba->hba_group.cg_item), 2126 config_item_name(&dev->dev_group.cg_item), 2127 dev->dev_alias); 2128 2129 return read_bytes; 2130 } 2131 2132 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page) 2133 { 2134 struct se_device *dev = to_device(item); 2135 2136 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) 2137 return 0; 2138 2139 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); 2140 } 2141 2142 static ssize_t target_dev_udev_path_store(struct config_item *item, 2143 const char *page, size_t count) 2144 { 2145 struct se_device *dev = to_device(item); 2146 struct se_hba *hba = dev->se_hba; 2147 ssize_t read_bytes; 2148 2149 if (count > (SE_UDEV_PATH_LEN-1)) { 2150 pr_err("udev_path count: %d exceeds" 2151 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 2152 SE_UDEV_PATH_LEN-1); 2153 return -EINVAL; 2154 } 2155 2156 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, 2157 "%s", page); 2158 if (!read_bytes) 2159 return -EINVAL; 2160 if (dev->udev_path[read_bytes - 1] == '\n') 2161 dev->udev_path[read_bytes - 1] = '\0'; 2162 2163 dev->dev_flags |= DF_USING_UDEV_PATH; 2164 2165 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 2166 config_item_name(&hba->hba_group.cg_item), 2167 config_item_name(&dev->dev_group.cg_item), 2168 dev->udev_path); 2169 2170 return read_bytes; 2171 } 2172 2173 static ssize_t target_dev_enable_show(struct config_item *item, char *page) 2174 { 2175 struct se_device *dev = to_device(item); 2176 2177 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev)); 2178 } 2179 2180 static ssize_t target_dev_enable_store(struct config_item *item, 2181 const char *page, size_t count) 2182 { 2183 struct se_device *dev = to_device(item); 2184 char *ptr; 2185 int ret; 2186 2187 ptr = strstr(page, "1"); 2188 if (!ptr) { 2189 pr_err("For dev_enable ops, only valid value" 2190 " is \"1\"\n"); 2191 return -EINVAL; 2192 } 2193 2194 ret = target_configure_device(dev); 2195 if (ret) 2196 return ret; 2197 return count; 2198 } 2199 2200 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page) 2201 { 2202 struct se_device *dev = to_device(item); 2203 struct config_item *lu_ci; 2204 struct t10_alua_lu_gp *lu_gp; 2205 struct t10_alua_lu_gp_member *lu_gp_mem; 2206 ssize_t len = 0; 2207 2208 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2209 if (!lu_gp_mem) 2210 return 0; 2211 2212 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2213 lu_gp = lu_gp_mem->lu_gp; 2214 if (lu_gp) { 2215 lu_ci = &lu_gp->lu_gp_group.cg_item; 2216 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 2217 config_item_name(lu_ci), lu_gp->lu_gp_id); 2218 } 2219 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2220 2221 return len; 2222 } 2223 2224 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item, 2225 const char *page, size_t count) 2226 { 2227 struct se_device *dev = to_device(item); 2228 struct se_hba *hba = dev->se_hba; 2229 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 2230 struct t10_alua_lu_gp_member *lu_gp_mem; 2231 unsigned char buf[LU_GROUP_NAME_BUF]; 2232 int move = 0; 2233 2234 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2235 if (!lu_gp_mem) 2236 return count; 2237 2238 if (count > LU_GROUP_NAME_BUF) { 2239 pr_err("ALUA LU Group Alias too large!\n"); 2240 return -EINVAL; 2241 } 2242 memset(buf, 0, LU_GROUP_NAME_BUF); 2243 memcpy(buf, page, count); 2244 /* 2245 * Any ALUA logical unit alias besides "NULL" means we will be 2246 * making a new group association. 2247 */ 2248 if (strcmp(strstrip(buf), "NULL")) { 2249 /* 2250 * core_alua_get_lu_gp_by_name() will increment reference to 2251 * struct t10_alua_lu_gp. This reference is released with 2252 * core_alua_get_lu_gp_by_name below(). 2253 */ 2254 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 2255 if (!lu_gp_new) 2256 return -ENODEV; 2257 } 2258 2259 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2260 lu_gp = lu_gp_mem->lu_gp; 2261 if (lu_gp) { 2262 /* 2263 * Clearing an existing lu_gp association, and replacing 2264 * with NULL 2265 */ 2266 if (!lu_gp_new) { 2267 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 2268 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 2269 " %hu\n", 2270 config_item_name(&hba->hba_group.cg_item), 2271 config_item_name(&dev->dev_group.cg_item), 2272 config_item_name(&lu_gp->lu_gp_group.cg_item), 2273 lu_gp->lu_gp_id); 2274 2275 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2276 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2277 2278 return count; 2279 } 2280 /* 2281 * Removing existing association of lu_gp_mem with lu_gp 2282 */ 2283 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2284 move = 1; 2285 } 2286 /* 2287 * Associate lu_gp_mem with lu_gp_new. 2288 */ 2289 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 2290 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2291 2292 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 2293 " core/alua/lu_gps/%s, ID: %hu\n", 2294 (move) ? "Moving" : "Adding", 2295 config_item_name(&hba->hba_group.cg_item), 2296 config_item_name(&dev->dev_group.cg_item), 2297 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 2298 lu_gp_new->lu_gp_id); 2299 2300 core_alua_put_lu_gp_from_name(lu_gp_new); 2301 return count; 2302 } 2303 2304 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page) 2305 { 2306 struct se_device *dev = to_device(item); 2307 struct t10_alua_lba_map *map; 2308 struct t10_alua_lba_map_member *mem; 2309 char *b = page; 2310 int bl = 0; 2311 char state; 2312 2313 spin_lock(&dev->t10_alua.lba_map_lock); 2314 if (!list_empty(&dev->t10_alua.lba_map_list)) 2315 bl += sprintf(b + bl, "%u %u\n", 2316 dev->t10_alua.lba_map_segment_size, 2317 dev->t10_alua.lba_map_segment_multiplier); 2318 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) { 2319 bl += sprintf(b + bl, "%llu %llu", 2320 map->lba_map_first_lba, map->lba_map_last_lba); 2321 list_for_each_entry(mem, &map->lba_map_mem_list, 2322 lba_map_mem_list) { 2323 switch (mem->lba_map_mem_alua_state) { 2324 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: 2325 state = 'O'; 2326 break; 2327 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: 2328 state = 'A'; 2329 break; 2330 case ALUA_ACCESS_STATE_STANDBY: 2331 state = 'S'; 2332 break; 2333 case ALUA_ACCESS_STATE_UNAVAILABLE: 2334 state = 'U'; 2335 break; 2336 default: 2337 state = '.'; 2338 break; 2339 } 2340 bl += sprintf(b + bl, " %d:%c", 2341 mem->lba_map_mem_alua_pg_id, state); 2342 } 2343 bl += sprintf(b + bl, "\n"); 2344 } 2345 spin_unlock(&dev->t10_alua.lba_map_lock); 2346 return bl; 2347 } 2348 2349 static ssize_t target_dev_lba_map_store(struct config_item *item, 2350 const char *page, size_t count) 2351 { 2352 struct se_device *dev = to_device(item); 2353 struct t10_alua_lba_map *lba_map = NULL; 2354 struct list_head lba_list; 2355 char *map_entries, *orig, *ptr; 2356 char state; 2357 int pg_num = -1, pg; 2358 int ret = 0, num = 0, pg_id, alua_state; 2359 unsigned long start_lba = -1, end_lba = -1; 2360 unsigned long segment_size = -1, segment_mult = -1; 2361 2362 orig = map_entries = kstrdup(page, GFP_KERNEL); 2363 if (!map_entries) 2364 return -ENOMEM; 2365 2366 INIT_LIST_HEAD(&lba_list); 2367 while ((ptr = strsep(&map_entries, "\n")) != NULL) { 2368 if (!*ptr) 2369 continue; 2370 2371 if (num == 0) { 2372 if (sscanf(ptr, "%lu %lu\n", 2373 &segment_size, &segment_mult) != 2) { 2374 pr_err("Invalid line %d\n", num); 2375 ret = -EINVAL; 2376 break; 2377 } 2378 num++; 2379 continue; 2380 } 2381 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) { 2382 pr_err("Invalid line %d\n", num); 2383 ret = -EINVAL; 2384 break; 2385 } 2386 ptr = strchr(ptr, ' '); 2387 if (!ptr) { 2388 pr_err("Invalid line %d, missing end lba\n", num); 2389 ret = -EINVAL; 2390 break; 2391 } 2392 ptr++; 2393 ptr = strchr(ptr, ' '); 2394 if (!ptr) { 2395 pr_err("Invalid line %d, missing state definitions\n", 2396 num); 2397 ret = -EINVAL; 2398 break; 2399 } 2400 ptr++; 2401 lba_map = core_alua_allocate_lba_map(&lba_list, 2402 start_lba, end_lba); 2403 if (IS_ERR(lba_map)) { 2404 ret = PTR_ERR(lba_map); 2405 break; 2406 } 2407 pg = 0; 2408 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) { 2409 switch (state) { 2410 case 'O': 2411 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED; 2412 break; 2413 case 'A': 2414 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED; 2415 break; 2416 case 'S': 2417 alua_state = ALUA_ACCESS_STATE_STANDBY; 2418 break; 2419 case 'U': 2420 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE; 2421 break; 2422 default: 2423 pr_err("Invalid ALUA state '%c'\n", state); 2424 ret = -EINVAL; 2425 goto out; 2426 } 2427 2428 ret = core_alua_allocate_lba_map_mem(lba_map, 2429 pg_id, alua_state); 2430 if (ret) { 2431 pr_err("Invalid target descriptor %d:%c " 2432 "at line %d\n", 2433 pg_id, state, num); 2434 break; 2435 } 2436 pg++; 2437 ptr = strchr(ptr, ' '); 2438 if (ptr) 2439 ptr++; 2440 else 2441 break; 2442 } 2443 if (pg_num == -1) 2444 pg_num = pg; 2445 else if (pg != pg_num) { 2446 pr_err("Only %d from %d port groups definitions " 2447 "at line %d\n", pg, pg_num, num); 2448 ret = -EINVAL; 2449 break; 2450 } 2451 num++; 2452 } 2453 out: 2454 if (ret) { 2455 core_alua_free_lba_map(&lba_list); 2456 count = ret; 2457 } else 2458 core_alua_set_lba_map(dev, &lba_list, 2459 segment_size, segment_mult); 2460 kfree(orig); 2461 return count; 2462 } 2463 2464 CONFIGFS_ATTR_RO(target_dev_, info); 2465 CONFIGFS_ATTR_WO(target_dev_, control); 2466 CONFIGFS_ATTR(target_dev_, alias); 2467 CONFIGFS_ATTR(target_dev_, udev_path); 2468 CONFIGFS_ATTR(target_dev_, enable); 2469 CONFIGFS_ATTR(target_dev_, alua_lu_gp); 2470 CONFIGFS_ATTR(target_dev_, lba_map); 2471 2472 static struct configfs_attribute *target_core_dev_attrs[] = { 2473 &target_dev_attr_info, 2474 &target_dev_attr_control, 2475 &target_dev_attr_alias, 2476 &target_dev_attr_udev_path, 2477 &target_dev_attr_enable, 2478 &target_dev_attr_alua_lu_gp, 2479 &target_dev_attr_lba_map, 2480 NULL, 2481 }; 2482 2483 static void target_core_dev_release(struct config_item *item) 2484 { 2485 struct config_group *dev_cg = to_config_group(item); 2486 struct se_device *dev = 2487 container_of(dev_cg, struct se_device, dev_group); 2488 2489 target_free_device(dev); 2490 } 2491 2492 /* 2493 * Used in target_core_fabric_configfs.c to verify valid se_device symlink 2494 * within target_fabric_port_link() 2495 */ 2496 struct configfs_item_operations target_core_dev_item_ops = { 2497 .release = target_core_dev_release, 2498 }; 2499 2500 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs); 2501 2502 /* End functions for struct config_item_type tb_dev_cit */ 2503 2504 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 2505 2506 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item) 2507 { 2508 return container_of(to_config_group(item), struct t10_alua_lu_gp, 2509 lu_gp_group); 2510 } 2511 2512 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page) 2513 { 2514 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2515 2516 if (!lu_gp->lu_gp_valid_id) 2517 return 0; 2518 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2519 } 2520 2521 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item, 2522 const char *page, size_t count) 2523 { 2524 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2525 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2526 unsigned long lu_gp_id; 2527 int ret; 2528 2529 ret = kstrtoul(page, 0, &lu_gp_id); 2530 if (ret < 0) { 2531 pr_err("kstrtoul() returned %d for" 2532 " lu_gp_id\n", ret); 2533 return ret; 2534 } 2535 if (lu_gp_id > 0x0000ffff) { 2536 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 2537 " 0x0000ffff\n", lu_gp_id); 2538 return -EINVAL; 2539 } 2540 2541 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2542 if (ret < 0) 2543 return -EINVAL; 2544 2545 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 2546 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2547 config_item_name(&alua_lu_gp_cg->cg_item), 2548 lu_gp->lu_gp_id); 2549 2550 return count; 2551 } 2552 2553 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page) 2554 { 2555 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2556 struct se_device *dev; 2557 struct se_hba *hba; 2558 struct t10_alua_lu_gp_member *lu_gp_mem; 2559 ssize_t len = 0, cur_len; 2560 unsigned char buf[LU_GROUP_NAME_BUF]; 2561 2562 memset(buf, 0, LU_GROUP_NAME_BUF); 2563 2564 spin_lock(&lu_gp->lu_gp_lock); 2565 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2566 dev = lu_gp_mem->lu_gp_mem_dev; 2567 hba = dev->se_hba; 2568 2569 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 2570 config_item_name(&hba->hba_group.cg_item), 2571 config_item_name(&dev->dev_group.cg_item)); 2572 cur_len++; /* Extra byte for NULL terminator */ 2573 2574 if ((cur_len + len) > PAGE_SIZE) { 2575 pr_warn("Ran out of lu_gp_show_attr" 2576 "_members buffer\n"); 2577 break; 2578 } 2579 memcpy(page+len, buf, cur_len); 2580 len += cur_len; 2581 } 2582 spin_unlock(&lu_gp->lu_gp_lock); 2583 2584 return len; 2585 } 2586 2587 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id); 2588 CONFIGFS_ATTR_RO(target_lu_gp_, members); 2589 2590 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2591 &target_lu_gp_attr_lu_gp_id, 2592 &target_lu_gp_attr_members, 2593 NULL, 2594 }; 2595 2596 static void target_core_alua_lu_gp_release(struct config_item *item) 2597 { 2598 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2599 struct t10_alua_lu_gp, lu_gp_group); 2600 2601 core_alua_free_lu_gp(lu_gp); 2602 } 2603 2604 static struct configfs_item_operations target_core_alua_lu_gp_ops = { 2605 .release = target_core_alua_lu_gp_release, 2606 }; 2607 2608 static const struct config_item_type target_core_alua_lu_gp_cit = { 2609 .ct_item_ops = &target_core_alua_lu_gp_ops, 2610 .ct_attrs = target_core_alua_lu_gp_attrs, 2611 .ct_owner = THIS_MODULE, 2612 }; 2613 2614 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2615 2616 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2617 2618 static struct config_group *target_core_alua_create_lu_gp( 2619 struct config_group *group, 2620 const char *name) 2621 { 2622 struct t10_alua_lu_gp *lu_gp; 2623 struct config_group *alua_lu_gp_cg = NULL; 2624 struct config_item *alua_lu_gp_ci = NULL; 2625 2626 lu_gp = core_alua_allocate_lu_gp(name, 0); 2627 if (IS_ERR(lu_gp)) 2628 return NULL; 2629 2630 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2631 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2632 2633 config_group_init_type_name(alua_lu_gp_cg, name, 2634 &target_core_alua_lu_gp_cit); 2635 2636 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2637 " Group: core/alua/lu_gps/%s\n", 2638 config_item_name(alua_lu_gp_ci)); 2639 2640 return alua_lu_gp_cg; 2641 2642 } 2643 2644 static void target_core_alua_drop_lu_gp( 2645 struct config_group *group, 2646 struct config_item *item) 2647 { 2648 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2649 struct t10_alua_lu_gp, lu_gp_group); 2650 2651 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2652 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2653 config_item_name(item), lu_gp->lu_gp_id); 2654 /* 2655 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 2656 * -> target_core_alua_lu_gp_release() 2657 */ 2658 config_item_put(item); 2659 } 2660 2661 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2662 .make_group = &target_core_alua_create_lu_gp, 2663 .drop_item = &target_core_alua_drop_lu_gp, 2664 }; 2665 2666 static const struct config_item_type target_core_alua_lu_gps_cit = { 2667 .ct_item_ops = NULL, 2668 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2669 .ct_owner = THIS_MODULE, 2670 }; 2671 2672 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2673 2674 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2675 2676 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item) 2677 { 2678 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp, 2679 tg_pt_gp_group); 2680 } 2681 2682 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item, 2683 char *page) 2684 { 2685 return sprintf(page, "%d\n", 2686 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state); 2687 } 2688 2689 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item, 2690 const char *page, size_t count) 2691 { 2692 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2693 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; 2694 unsigned long tmp; 2695 int new_state, ret; 2696 2697 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2698 pr_err("Unable to do implicit ALUA on non valid" 2699 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id); 2700 return -EINVAL; 2701 } 2702 if (!target_dev_configured(dev)) { 2703 pr_err("Unable to set alua_access_state while device is" 2704 " not configured\n"); 2705 return -ENODEV; 2706 } 2707 2708 ret = kstrtoul(page, 0, &tmp); 2709 if (ret < 0) { 2710 pr_err("Unable to extract new ALUA access state from" 2711 " %s\n", page); 2712 return ret; 2713 } 2714 new_state = (int)tmp; 2715 2716 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) { 2717 pr_err("Unable to process implicit configfs ALUA" 2718 " transition while TPGS_IMPLICIT_ALUA is disabled\n"); 2719 return -EINVAL; 2720 } 2721 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA && 2722 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) { 2723 /* LBA DEPENDENT is only allowed with implicit ALUA */ 2724 pr_err("Unable to process implicit configfs ALUA transition" 2725 " while explicit ALUA management is enabled\n"); 2726 return -EINVAL; 2727 } 2728 2729 ret = core_alua_do_port_transition(tg_pt_gp, dev, 2730 NULL, NULL, new_state, 0); 2731 return (!ret) ? count : -EINVAL; 2732 } 2733 2734 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item, 2735 char *page) 2736 { 2737 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2738 return sprintf(page, "%s\n", 2739 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2740 } 2741 2742 static ssize_t target_tg_pt_gp_alua_access_status_store( 2743 struct config_item *item, const char *page, size_t count) 2744 { 2745 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2746 unsigned long tmp; 2747 int new_status, ret; 2748 2749 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2750 pr_err("Unable to do set ALUA access status on non" 2751 " valid tg_pt_gp ID: %hu\n", 2752 tg_pt_gp->tg_pt_gp_valid_id); 2753 return -EINVAL; 2754 } 2755 2756 ret = kstrtoul(page, 0, &tmp); 2757 if (ret < 0) { 2758 pr_err("Unable to extract new ALUA access status" 2759 " from %s\n", page); 2760 return ret; 2761 } 2762 new_status = (int)tmp; 2763 2764 if ((new_status != ALUA_STATUS_NONE) && 2765 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && 2766 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { 2767 pr_err("Illegal ALUA access status: 0x%02x\n", 2768 new_status); 2769 return -EINVAL; 2770 } 2771 2772 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2773 return count; 2774 } 2775 2776 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item, 2777 char *page) 2778 { 2779 return core_alua_show_access_type(to_tg_pt_gp(item), page); 2780 } 2781 2782 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item, 2783 const char *page, size_t count) 2784 { 2785 return core_alua_store_access_type(to_tg_pt_gp(item), page, count); 2786 } 2787 2788 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \ 2789 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \ 2790 struct config_item *item, char *p) \ 2791 { \ 2792 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 2793 return sprintf(p, "%d\n", \ 2794 !!(t->tg_pt_gp_alua_supported_states & _bit)); \ 2795 } \ 2796 \ 2797 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \ 2798 struct config_item *item, const char *p, size_t c) \ 2799 { \ 2800 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 2801 unsigned long tmp; \ 2802 int ret; \ 2803 \ 2804 if (!t->tg_pt_gp_valid_id) { \ 2805 pr_err("Unable to do set " #_name " ALUA state on non" \ 2806 " valid tg_pt_gp ID: %hu\n", \ 2807 t->tg_pt_gp_valid_id); \ 2808 return -EINVAL; \ 2809 } \ 2810 \ 2811 ret = kstrtoul(p, 0, &tmp); \ 2812 if (ret < 0) { \ 2813 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \ 2814 return -EINVAL; \ 2815 } \ 2816 if (tmp > 1) { \ 2817 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \ 2818 return -EINVAL; \ 2819 } \ 2820 if (tmp) \ 2821 t->tg_pt_gp_alua_supported_states |= _bit; \ 2822 else \ 2823 t->tg_pt_gp_alua_supported_states &= ~_bit; \ 2824 \ 2825 return c; \ 2826 } 2827 2828 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP); 2829 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP); 2830 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP); 2831 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP); 2832 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP); 2833 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP); 2834 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP); 2835 2836 static ssize_t target_tg_pt_gp_alua_write_metadata_show( 2837 struct config_item *item, char *page) 2838 { 2839 return sprintf(page, "%d\n", 2840 to_tg_pt_gp(item)->tg_pt_gp_write_metadata); 2841 } 2842 2843 static ssize_t target_tg_pt_gp_alua_write_metadata_store( 2844 struct config_item *item, const char *page, size_t count) 2845 { 2846 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2847 unsigned long tmp; 2848 int ret; 2849 2850 ret = kstrtoul(page, 0, &tmp); 2851 if (ret < 0) { 2852 pr_err("Unable to extract alua_write_metadata\n"); 2853 return ret; 2854 } 2855 2856 if ((tmp != 0) && (tmp != 1)) { 2857 pr_err("Illegal value for alua_write_metadata:" 2858 " %lu\n", tmp); 2859 return -EINVAL; 2860 } 2861 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 2862 2863 return count; 2864 } 2865 2866 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item, 2867 char *page) 2868 { 2869 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page); 2870 } 2871 2872 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item, 2873 const char *page, size_t count) 2874 { 2875 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page, 2876 count); 2877 } 2878 2879 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item, 2880 char *page) 2881 { 2882 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page); 2883 } 2884 2885 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item, 2886 const char *page, size_t count) 2887 { 2888 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page, 2889 count); 2890 } 2891 2892 static ssize_t target_tg_pt_gp_implicit_trans_secs_show( 2893 struct config_item *item, char *page) 2894 { 2895 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page); 2896 } 2897 2898 static ssize_t target_tg_pt_gp_implicit_trans_secs_store( 2899 struct config_item *item, const char *page, size_t count) 2900 { 2901 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page, 2902 count); 2903 } 2904 2905 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item, 2906 char *page) 2907 { 2908 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page); 2909 } 2910 2911 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item, 2912 const char *page, size_t count) 2913 { 2914 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count); 2915 } 2916 2917 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item, 2918 char *page) 2919 { 2920 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2921 2922 if (!tg_pt_gp->tg_pt_gp_valid_id) 2923 return 0; 2924 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 2925 } 2926 2927 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item, 2928 const char *page, size_t count) 2929 { 2930 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2931 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2932 unsigned long tg_pt_gp_id; 2933 int ret; 2934 2935 ret = kstrtoul(page, 0, &tg_pt_gp_id); 2936 if (ret < 0) { 2937 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n", 2938 page); 2939 return ret; 2940 } 2941 if (tg_pt_gp_id > 0x0000ffff) { 2942 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n", 2943 tg_pt_gp_id); 2944 return -EINVAL; 2945 } 2946 2947 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 2948 if (ret < 0) 2949 return -EINVAL; 2950 2951 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 2952 "core/alua/tg_pt_gps/%s to ID: %hu\n", 2953 config_item_name(&alua_tg_pt_gp_cg->cg_item), 2954 tg_pt_gp->tg_pt_gp_id); 2955 2956 return count; 2957 } 2958 2959 static ssize_t target_tg_pt_gp_members_show(struct config_item *item, 2960 char *page) 2961 { 2962 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2963 struct se_lun *lun; 2964 ssize_t len = 0, cur_len; 2965 unsigned char buf[TG_PT_GROUP_NAME_BUF]; 2966 2967 memset(buf, 0, TG_PT_GROUP_NAME_BUF); 2968 2969 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 2970 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, 2971 lun_tg_pt_gp_link) { 2972 struct se_portal_group *tpg = lun->lun_tpg; 2973 2974 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 2975 "/%s\n", tpg->se_tpg_tfo->fabric_name, 2976 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 2977 tpg->se_tpg_tfo->tpg_get_tag(tpg), 2978 config_item_name(&lun->lun_group.cg_item)); 2979 cur_len++; /* Extra byte for NULL terminator */ 2980 2981 if ((cur_len + len) > PAGE_SIZE) { 2982 pr_warn("Ran out of lu_gp_show_attr" 2983 "_members buffer\n"); 2984 break; 2985 } 2986 memcpy(page+len, buf, cur_len); 2987 len += cur_len; 2988 } 2989 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 2990 2991 return len; 2992 } 2993 2994 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state); 2995 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status); 2996 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type); 2997 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning); 2998 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline); 2999 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent); 3000 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable); 3001 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby); 3002 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized); 3003 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized); 3004 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata); 3005 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs); 3006 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs); 3007 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs); 3008 CONFIGFS_ATTR(target_tg_pt_gp_, preferred); 3009 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id); 3010 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members); 3011 3012 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 3013 &target_tg_pt_gp_attr_alua_access_state, 3014 &target_tg_pt_gp_attr_alua_access_status, 3015 &target_tg_pt_gp_attr_alua_access_type, 3016 &target_tg_pt_gp_attr_alua_support_transitioning, 3017 &target_tg_pt_gp_attr_alua_support_offline, 3018 &target_tg_pt_gp_attr_alua_support_lba_dependent, 3019 &target_tg_pt_gp_attr_alua_support_unavailable, 3020 &target_tg_pt_gp_attr_alua_support_standby, 3021 &target_tg_pt_gp_attr_alua_support_active_nonoptimized, 3022 &target_tg_pt_gp_attr_alua_support_active_optimized, 3023 &target_tg_pt_gp_attr_alua_write_metadata, 3024 &target_tg_pt_gp_attr_nonop_delay_msecs, 3025 &target_tg_pt_gp_attr_trans_delay_msecs, 3026 &target_tg_pt_gp_attr_implicit_trans_secs, 3027 &target_tg_pt_gp_attr_preferred, 3028 &target_tg_pt_gp_attr_tg_pt_gp_id, 3029 &target_tg_pt_gp_attr_members, 3030 NULL, 3031 }; 3032 3033 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 3034 { 3035 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3036 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3037 3038 core_alua_free_tg_pt_gp(tg_pt_gp); 3039 } 3040 3041 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 3042 .release = target_core_alua_tg_pt_gp_release, 3043 }; 3044 3045 static const struct config_item_type target_core_alua_tg_pt_gp_cit = { 3046 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 3047 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 3048 .ct_owner = THIS_MODULE, 3049 }; 3050 3051 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 3052 3053 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3054 3055 static struct config_group *target_core_alua_create_tg_pt_gp( 3056 struct config_group *group, 3057 const char *name) 3058 { 3059 struct t10_alua *alua = container_of(group, struct t10_alua, 3060 alua_tg_pt_gps_group); 3061 struct t10_alua_tg_pt_gp *tg_pt_gp; 3062 struct config_group *alua_tg_pt_gp_cg = NULL; 3063 struct config_item *alua_tg_pt_gp_ci = NULL; 3064 3065 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0); 3066 if (!tg_pt_gp) 3067 return NULL; 3068 3069 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 3070 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 3071 3072 config_group_init_type_name(alua_tg_pt_gp_cg, name, 3073 &target_core_alua_tg_pt_gp_cit); 3074 3075 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 3076 " Group: alua/tg_pt_gps/%s\n", 3077 config_item_name(alua_tg_pt_gp_ci)); 3078 3079 return alua_tg_pt_gp_cg; 3080 } 3081 3082 static void target_core_alua_drop_tg_pt_gp( 3083 struct config_group *group, 3084 struct config_item *item) 3085 { 3086 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3087 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3088 3089 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 3090 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 3091 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 3092 /* 3093 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 3094 * -> target_core_alua_tg_pt_gp_release(). 3095 */ 3096 config_item_put(item); 3097 } 3098 3099 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 3100 .make_group = &target_core_alua_create_tg_pt_gp, 3101 .drop_item = &target_core_alua_drop_tg_pt_gp, 3102 }; 3103 3104 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL); 3105 3106 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3107 3108 /* Start functions for struct config_item_type target_core_alua_cit */ 3109 3110 /* 3111 * target_core_alua_cit is a ConfigFS group that lives under 3112 * /sys/kernel/config/target/core/alua. There are default groups 3113 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 3114 * target_core_alua_cit in target_core_init_configfs() below. 3115 */ 3116 static const struct config_item_type target_core_alua_cit = { 3117 .ct_item_ops = NULL, 3118 .ct_attrs = NULL, 3119 .ct_owner = THIS_MODULE, 3120 }; 3121 3122 /* End functions for struct config_item_type target_core_alua_cit */ 3123 3124 /* Start functions for struct config_item_type tb_dev_stat_cit */ 3125 3126 static struct config_group *target_core_stat_mkdir( 3127 struct config_group *group, 3128 const char *name) 3129 { 3130 return ERR_PTR(-ENOSYS); 3131 } 3132 3133 static void target_core_stat_rmdir( 3134 struct config_group *group, 3135 struct config_item *item) 3136 { 3137 return; 3138 } 3139 3140 static struct configfs_group_operations target_core_stat_group_ops = { 3141 .make_group = &target_core_stat_mkdir, 3142 .drop_item = &target_core_stat_rmdir, 3143 }; 3144 3145 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL); 3146 3147 /* End functions for struct config_item_type tb_dev_stat_cit */ 3148 3149 /* Start functions for struct config_item_type target_core_hba_cit */ 3150 3151 static struct config_group *target_core_make_subdev( 3152 struct config_group *group, 3153 const char *name) 3154 { 3155 struct t10_alua_tg_pt_gp *tg_pt_gp; 3156 struct config_item *hba_ci = &group->cg_item; 3157 struct se_hba *hba = item_to_hba(hba_ci); 3158 struct target_backend *tb = hba->backend; 3159 struct se_device *dev; 3160 int errno = -ENOMEM, ret; 3161 3162 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 3163 if (ret) 3164 return ERR_PTR(ret); 3165 3166 dev = target_alloc_device(hba, name); 3167 if (!dev) 3168 goto out_unlock; 3169 3170 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit); 3171 3172 config_group_init_type_name(&dev->dev_action_group, "action", 3173 &tb->tb_dev_action_cit); 3174 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group); 3175 3176 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib", 3177 &tb->tb_dev_attrib_cit); 3178 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group); 3179 3180 config_group_init_type_name(&dev->dev_pr_group, "pr", 3181 &tb->tb_dev_pr_cit); 3182 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group); 3183 3184 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn", 3185 &tb->tb_dev_wwn_cit); 3186 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group, 3187 &dev->dev_group); 3188 3189 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group, 3190 "alua", &tb->tb_dev_alua_tg_pt_gps_cit); 3191 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group, 3192 &dev->dev_group); 3193 3194 config_group_init_type_name(&dev->dev_stat_grps.stat_group, 3195 "statistics", &tb->tb_dev_stat_cit); 3196 configfs_add_default_group(&dev->dev_stat_grps.stat_group, 3197 &dev->dev_group); 3198 3199 /* 3200 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 3201 */ 3202 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1); 3203 if (!tg_pt_gp) 3204 goto out_free_device; 3205 dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 3206 3207 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 3208 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 3209 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group, 3210 &dev->t10_alua.alua_tg_pt_gps_group); 3211 3212 /* 3213 * Add core/$HBA/$DEV/statistics/ default groups 3214 */ 3215 target_stat_setup_dev_default_groups(dev); 3216 3217 mutex_unlock(&hba->hba_access_mutex); 3218 return &dev->dev_group; 3219 3220 out_free_device: 3221 target_free_device(dev); 3222 out_unlock: 3223 mutex_unlock(&hba->hba_access_mutex); 3224 return ERR_PTR(errno); 3225 } 3226 3227 static void target_core_drop_subdev( 3228 struct config_group *group, 3229 struct config_item *item) 3230 { 3231 struct config_group *dev_cg = to_config_group(item); 3232 struct se_device *dev = 3233 container_of(dev_cg, struct se_device, dev_group); 3234 struct se_hba *hba; 3235 3236 hba = item_to_hba(&dev->se_hba->hba_group.cg_item); 3237 3238 mutex_lock(&hba->hba_access_mutex); 3239 3240 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group); 3241 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group); 3242 3243 /* 3244 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 3245 * directly from target_core_alua_tg_pt_gp_release(). 3246 */ 3247 dev->t10_alua.default_tg_pt_gp = NULL; 3248 3249 configfs_remove_default_groups(dev_cg); 3250 3251 /* 3252 * se_dev is released from target_core_dev_item_ops->release() 3253 */ 3254 config_item_put(item); 3255 mutex_unlock(&hba->hba_access_mutex); 3256 } 3257 3258 static struct configfs_group_operations target_core_hba_group_ops = { 3259 .make_group = target_core_make_subdev, 3260 .drop_item = target_core_drop_subdev, 3261 }; 3262 3263 3264 static inline struct se_hba *to_hba(struct config_item *item) 3265 { 3266 return container_of(to_config_group(item), struct se_hba, hba_group); 3267 } 3268 3269 static ssize_t target_hba_info_show(struct config_item *item, char *page) 3270 { 3271 struct se_hba *hba = to_hba(item); 3272 3273 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 3274 hba->hba_id, hba->backend->ops->name, 3275 TARGET_CORE_VERSION); 3276 } 3277 3278 static ssize_t target_hba_mode_show(struct config_item *item, char *page) 3279 { 3280 struct se_hba *hba = to_hba(item); 3281 int hba_mode = 0; 3282 3283 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 3284 hba_mode = 1; 3285 3286 return sprintf(page, "%d\n", hba_mode); 3287 } 3288 3289 static ssize_t target_hba_mode_store(struct config_item *item, 3290 const char *page, size_t count) 3291 { 3292 struct se_hba *hba = to_hba(item); 3293 unsigned long mode_flag; 3294 int ret; 3295 3296 if (hba->backend->ops->pmode_enable_hba == NULL) 3297 return -EINVAL; 3298 3299 ret = kstrtoul(page, 0, &mode_flag); 3300 if (ret < 0) { 3301 pr_err("Unable to extract hba mode flag: %d\n", ret); 3302 return ret; 3303 } 3304 3305 if (hba->dev_count) { 3306 pr_err("Unable to set hba_mode with active devices\n"); 3307 return -EINVAL; 3308 } 3309 3310 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag); 3311 if (ret < 0) 3312 return -EINVAL; 3313 if (ret > 0) 3314 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 3315 else if (ret == 0) 3316 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 3317 3318 return count; 3319 } 3320 3321 CONFIGFS_ATTR_RO(target_, hba_info); 3322 CONFIGFS_ATTR(target_, hba_mode); 3323 3324 static void target_core_hba_release(struct config_item *item) 3325 { 3326 struct se_hba *hba = container_of(to_config_group(item), 3327 struct se_hba, hba_group); 3328 core_delete_hba(hba); 3329 } 3330 3331 static struct configfs_attribute *target_core_hba_attrs[] = { 3332 &target_attr_hba_info, 3333 &target_attr_hba_mode, 3334 NULL, 3335 }; 3336 3337 static struct configfs_item_operations target_core_hba_item_ops = { 3338 .release = target_core_hba_release, 3339 }; 3340 3341 static const struct config_item_type target_core_hba_cit = { 3342 .ct_item_ops = &target_core_hba_item_ops, 3343 .ct_group_ops = &target_core_hba_group_ops, 3344 .ct_attrs = target_core_hba_attrs, 3345 .ct_owner = THIS_MODULE, 3346 }; 3347 3348 static struct config_group *target_core_call_addhbatotarget( 3349 struct config_group *group, 3350 const char *name) 3351 { 3352 char *se_plugin_str, *str, *str2; 3353 struct se_hba *hba; 3354 char buf[TARGET_CORE_NAME_MAX_LEN]; 3355 unsigned long plugin_dep_id = 0; 3356 int ret; 3357 3358 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN); 3359 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 3360 pr_err("Passed *name strlen(): %d exceeds" 3361 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 3362 TARGET_CORE_NAME_MAX_LEN); 3363 return ERR_PTR(-ENAMETOOLONG); 3364 } 3365 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 3366 3367 str = strstr(buf, "_"); 3368 if (!str) { 3369 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 3370 return ERR_PTR(-EINVAL); 3371 } 3372 se_plugin_str = buf; 3373 /* 3374 * Special case for subsystem plugins that have "_" in their names. 3375 * Namely rd_direct and rd_mcp.. 3376 */ 3377 str2 = strstr(str+1, "_"); 3378 if (str2) { 3379 *str2 = '\0'; /* Terminate for *se_plugin_str */ 3380 str2++; /* Skip to start of plugin dependent ID */ 3381 str = str2; 3382 } else { 3383 *str = '\0'; /* Terminate for *se_plugin_str */ 3384 str++; /* Skip to start of plugin dependent ID */ 3385 } 3386 3387 ret = kstrtoul(str, 0, &plugin_dep_id); 3388 if (ret < 0) { 3389 pr_err("kstrtoul() returned %d for" 3390 " plugin_dep_id\n", ret); 3391 return ERR_PTR(ret); 3392 } 3393 /* 3394 * Load up TCM subsystem plugins if they have not already been loaded. 3395 */ 3396 transport_subsystem_check_init(); 3397 3398 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 3399 if (IS_ERR(hba)) 3400 return ERR_CAST(hba); 3401 3402 config_group_init_type_name(&hba->hba_group, name, 3403 &target_core_hba_cit); 3404 3405 return &hba->hba_group; 3406 } 3407 3408 static void target_core_call_delhbafromtarget( 3409 struct config_group *group, 3410 struct config_item *item) 3411 { 3412 /* 3413 * core_delete_hba() is called from target_core_hba_item_ops->release() 3414 * -> target_core_hba_release() 3415 */ 3416 config_item_put(item); 3417 } 3418 3419 static struct configfs_group_operations target_core_group_ops = { 3420 .make_group = target_core_call_addhbatotarget, 3421 .drop_item = target_core_call_delhbafromtarget, 3422 }; 3423 3424 static const struct config_item_type target_core_cit = { 3425 .ct_item_ops = NULL, 3426 .ct_group_ops = &target_core_group_ops, 3427 .ct_attrs = NULL, 3428 .ct_owner = THIS_MODULE, 3429 }; 3430 3431 /* Stop functions for struct config_item_type target_core_hba_cit */ 3432 3433 void target_setup_backend_cits(struct target_backend *tb) 3434 { 3435 target_core_setup_dev_cit(tb); 3436 target_core_setup_dev_action_cit(tb); 3437 target_core_setup_dev_attrib_cit(tb); 3438 target_core_setup_dev_pr_cit(tb); 3439 target_core_setup_dev_wwn_cit(tb); 3440 target_core_setup_dev_alua_tg_pt_gps_cit(tb); 3441 target_core_setup_dev_stat_cit(tb); 3442 } 3443 3444 static void target_init_dbroot(void) 3445 { 3446 struct file *fp; 3447 3448 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED); 3449 fp = filp_open(db_root_stage, O_RDONLY, 0); 3450 if (IS_ERR(fp)) { 3451 pr_err("db_root: cannot open: %s\n", db_root_stage); 3452 return; 3453 } 3454 if (!S_ISDIR(file_inode(fp)->i_mode)) { 3455 filp_close(fp, NULL); 3456 pr_err("db_root: not a valid directory: %s\n", db_root_stage); 3457 return; 3458 } 3459 filp_close(fp, NULL); 3460 3461 strncpy(db_root, db_root_stage, DB_ROOT_LEN); 3462 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); 3463 } 3464 3465 static int __init target_core_init_configfs(void) 3466 { 3467 struct configfs_subsystem *subsys = &target_core_fabrics; 3468 struct t10_alua_lu_gp *lu_gp; 3469 int ret; 3470 3471 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 3472 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3473 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3474 3475 config_group_init(&subsys->su_group); 3476 mutex_init(&subsys->su_mutex); 3477 3478 ret = init_se_kmem_caches(); 3479 if (ret < 0) 3480 return ret; 3481 /* 3482 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3483 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3484 */ 3485 config_group_init_type_name(&target_core_hbagroup, "core", 3486 &target_core_cit); 3487 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group); 3488 3489 /* 3490 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3491 */ 3492 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit); 3493 configfs_add_default_group(&alua_group, &target_core_hbagroup); 3494 3495 /* 3496 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3497 * groups under /sys/kernel/config/target/core/alua/ 3498 */ 3499 config_group_init_type_name(&alua_lu_gps_group, "lu_gps", 3500 &target_core_alua_lu_gps_cit); 3501 configfs_add_default_group(&alua_lu_gps_group, &alua_group); 3502 3503 /* 3504 * Add core/alua/lu_gps/default_lu_gp 3505 */ 3506 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3507 if (IS_ERR(lu_gp)) { 3508 ret = -ENOMEM; 3509 goto out_global; 3510 } 3511 3512 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3513 &target_core_alua_lu_gp_cit); 3514 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group); 3515 3516 default_lu_gp = lu_gp; 3517 3518 /* 3519 * Register the target_core_mod subsystem with configfs. 3520 */ 3521 ret = configfs_register_subsystem(subsys); 3522 if (ret < 0) { 3523 pr_err("Error %d while registering subsystem %s\n", 3524 ret, subsys->su_group.cg_item.ci_namebuf); 3525 goto out_global; 3526 } 3527 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 3528 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s" 3529 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3530 /* 3531 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3532 */ 3533 ret = rd_module_init(); 3534 if (ret < 0) 3535 goto out; 3536 3537 ret = core_dev_setup_virtual_lun0(); 3538 if (ret < 0) 3539 goto out; 3540 3541 ret = target_xcopy_setup_pt(); 3542 if (ret < 0) 3543 goto out; 3544 3545 target_init_dbroot(); 3546 3547 return 0; 3548 3549 out: 3550 configfs_unregister_subsystem(subsys); 3551 core_dev_release_virtual_lun0(); 3552 rd_module_exit(); 3553 out_global: 3554 if (default_lu_gp) { 3555 core_alua_free_lu_gp(default_lu_gp); 3556 default_lu_gp = NULL; 3557 } 3558 release_se_kmem_caches(); 3559 return ret; 3560 } 3561 3562 static void __exit target_core_exit_configfs(void) 3563 { 3564 configfs_remove_default_groups(&alua_lu_gps_group); 3565 configfs_remove_default_groups(&alua_group); 3566 configfs_remove_default_groups(&target_core_hbagroup); 3567 3568 /* 3569 * We expect subsys->su_group.default_groups to be released 3570 * by configfs subsystem provider logic.. 3571 */ 3572 configfs_unregister_subsystem(&target_core_fabrics); 3573 3574 core_alua_free_lu_gp(default_lu_gp); 3575 default_lu_gp = NULL; 3576 3577 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3578 " Infrastructure\n"); 3579 3580 core_dev_release_virtual_lun0(); 3581 rd_module_exit(); 3582 target_xcopy_release_pt(); 3583 release_se_kmem_caches(); 3584 } 3585 3586 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3587 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3588 MODULE_LICENSE("GPL"); 3589 3590 module_init(target_core_init_configfs); 3591 module_exit(target_core_exit_configfs); 3592