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