1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /******************************************************************************* 3 * Filename: target_core_configfs.c 4 * 5 * This file contains ConfigFS logic for the Generic Target Engine project. 6 * 7 * (c) Copyright 2008-2013 Datera, Inc. 8 * 9 * Nicholas A. Bellinger <nab@kernel.org> 10 * 11 * based on configfs Copyright (C) 2005 Oracle. All rights reserved. 12 * 13 ****************************************************************************/ 14 15 #include <linux/kstrtox.h> 16 #include <linux/module.h> 17 #include <linux/moduleparam.h> 18 #include <generated/utsrelease.h> 19 #include <linux/utsname.h> 20 #include <linux/init.h> 21 #include <linux/fs.h> 22 #include <linux/namei.h> 23 #include <linux/slab.h> 24 #include <linux/types.h> 25 #include <linux/delay.h> 26 #include <linux/unistd.h> 27 #include <linux/string.h> 28 #include <linux/parser.h> 29 #include <linux/syscalls.h> 30 #include <linux/configfs.h> 31 #include <linux/spinlock.h> 32 33 #include <target/target_core_base.h> 34 #include <target/target_core_backend.h> 35 #include <target/target_core_fabric.h> 36 37 #include "target_core_internal.h" 38 #include "target_core_alua.h" 39 #include "target_core_pr.h" 40 #include "target_core_rd.h" 41 #include "target_core_xcopy.h" 42 43 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \ 44 static void target_core_setup_##_name##_cit(struct target_backend *tb) \ 45 { \ 46 struct config_item_type *cit = &tb->tb_##_name##_cit; \ 47 \ 48 cit->ct_item_ops = _item_ops; \ 49 cit->ct_group_ops = _group_ops; \ 50 cit->ct_attrs = _attrs; \ 51 cit->ct_owner = tb->ops->owner; \ 52 pr_debug("Setup generic %s\n", __stringify(_name)); \ 53 } 54 55 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \ 56 static void target_core_setup_##_name##_cit(struct target_backend *tb) \ 57 { \ 58 struct config_item_type *cit = &tb->tb_##_name##_cit; \ 59 \ 60 cit->ct_item_ops = _item_ops; \ 61 cit->ct_group_ops = _group_ops; \ 62 cit->ct_attrs = tb->ops->tb_##_name##_attrs; \ 63 cit->ct_owner = tb->ops->owner; \ 64 pr_debug("Setup generic %s\n", __stringify(_name)); \ 65 } 66 67 extern struct t10_alua_lu_gp *default_lu_gp; 68 69 static LIST_HEAD(g_tf_list); 70 static DEFINE_MUTEX(g_tf_lock); 71 72 static struct config_group target_core_hbagroup; 73 static struct config_group alua_group; 74 static struct config_group alua_lu_gps_group; 75 76 static unsigned int target_devices; 77 static DEFINE_MUTEX(target_devices_lock); 78 79 static inline struct se_hba * 80 item_to_hba(struct config_item *item) 81 { 82 return container_of(to_config_group(item), struct se_hba, hba_group); 83 } 84 85 /* 86 * Attributes for /sys/kernel/config/target/ 87 */ 88 static ssize_t target_core_item_version_show(struct config_item *item, 89 char *page) 90 { 91 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s" 92 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION, 93 utsname()->sysname, utsname()->machine); 94 } 95 96 CONFIGFS_ATTR_RO(target_core_item_, version); 97 98 char db_root[DB_ROOT_LEN] = DB_ROOT_DEFAULT; 99 static char db_root_stage[DB_ROOT_LEN]; 100 101 static ssize_t target_core_item_dbroot_show(struct config_item *item, 102 char *page) 103 { 104 return sprintf(page, "%s\n", db_root); 105 } 106 107 static ssize_t target_core_item_dbroot_store(struct config_item *item, 108 const char *page, size_t count) 109 { 110 ssize_t read_bytes; 111 struct file *fp; 112 ssize_t r = -EINVAL; 113 114 mutex_lock(&target_devices_lock); 115 if (target_devices) { 116 pr_err("db_root: cannot be changed because it's in use\n"); 117 goto unlock; 118 } 119 120 if (count > (DB_ROOT_LEN - 1)) { 121 pr_err("db_root: count %d exceeds DB_ROOT_LEN-1: %u\n", 122 (int)count, DB_ROOT_LEN - 1); 123 goto unlock; 124 } 125 126 read_bytes = scnprintf(db_root_stage, DB_ROOT_LEN, "%s", page); 127 if (!read_bytes) 128 goto unlock; 129 130 if (db_root_stage[read_bytes - 1] == '\n') 131 db_root_stage[read_bytes - 1] = '\0'; 132 133 /* validate new db root before accepting it */ 134 fp = filp_open(db_root_stage, O_RDONLY, 0); 135 if (IS_ERR(fp)) { 136 pr_err("db_root: cannot open: %s\n", db_root_stage); 137 goto unlock; 138 } 139 if (!S_ISDIR(file_inode(fp)->i_mode)) { 140 filp_close(fp, NULL); 141 pr_err("db_root: not a directory: %s\n", db_root_stage); 142 goto unlock; 143 } 144 filp_close(fp, NULL); 145 146 strscpy(db_root, db_root_stage); 147 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); 148 149 r = read_bytes; 150 151 unlock: 152 mutex_unlock(&target_devices_lock); 153 return r; 154 } 155 156 CONFIGFS_ATTR(target_core_item_, dbroot); 157 158 static struct target_fabric_configfs *target_core_get_fabric( 159 const char *name) 160 { 161 struct target_fabric_configfs *tf; 162 163 if (!name) 164 return NULL; 165 166 mutex_lock(&g_tf_lock); 167 list_for_each_entry(tf, &g_tf_list, tf_list) { 168 const char *cmp_name = tf->tf_ops->fabric_alias; 169 if (!cmp_name) 170 cmp_name = tf->tf_ops->fabric_name; 171 if (!strcmp(cmp_name, name)) { 172 atomic_inc(&tf->tf_access_cnt); 173 mutex_unlock(&g_tf_lock); 174 return tf; 175 } 176 } 177 mutex_unlock(&g_tf_lock); 178 179 return NULL; 180 } 181 182 /* 183 * Called from struct target_core_group_ops->make_group() 184 */ 185 static struct config_group *target_core_register_fabric( 186 struct config_group *group, 187 const char *name) 188 { 189 struct target_fabric_configfs *tf; 190 int ret; 191 192 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:" 193 " %s\n", group, name); 194 195 tf = target_core_get_fabric(name); 196 if (!tf) { 197 pr_debug("target_core_register_fabric() trying autoload for %s\n", 198 name); 199 200 /* 201 * Below are some hardcoded request_module() calls to automatically 202 * local fabric modules when the following is called: 203 * 204 * mkdir -p /sys/kernel/config/target/$MODULE_NAME 205 * 206 * Note that this does not limit which TCM fabric module can be 207 * registered, but simply provids auto loading logic for modules with 208 * mkdir(2) system calls with known TCM fabric modules. 209 */ 210 211 if (!strncmp(name, "iscsi", 5)) { 212 /* 213 * Automatically load the LIO Target fabric module when the 214 * following is called: 215 * 216 * mkdir -p $CONFIGFS/target/iscsi 217 */ 218 ret = request_module("iscsi_target_mod"); 219 if (ret < 0) { 220 pr_debug("request_module() failed for" 221 " iscsi_target_mod.ko: %d\n", ret); 222 return ERR_PTR(-EINVAL); 223 } 224 } else if (!strncmp(name, "loopback", 8)) { 225 /* 226 * Automatically load the tcm_loop fabric module when the 227 * following is called: 228 * 229 * mkdir -p $CONFIGFS/target/loopback 230 */ 231 ret = request_module("tcm_loop"); 232 if (ret < 0) { 233 pr_debug("request_module() failed for" 234 " tcm_loop.ko: %d\n", ret); 235 return ERR_PTR(-EINVAL); 236 } 237 } 238 239 tf = target_core_get_fabric(name); 240 } 241 242 if (!tf) { 243 pr_debug("target_core_get_fabric() failed for %s\n", 244 name); 245 return ERR_PTR(-EINVAL); 246 } 247 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:" 248 " %s\n", tf->tf_ops->fabric_name); 249 /* 250 * On a successful target_core_get_fabric() look, the returned 251 * struct target_fabric_configfs *tf will contain a usage reference. 252 */ 253 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n", 254 &tf->tf_wwn_cit); 255 256 config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit); 257 258 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth", 259 &tf->tf_discovery_cit); 260 configfs_add_default_group(&tf->tf_disc_group, &tf->tf_group); 261 262 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric: %s\n", 263 config_item_name(&tf->tf_group.cg_item)); 264 return &tf->tf_group; 265 } 266 267 /* 268 * Called from struct target_core_group_ops->drop_item() 269 */ 270 static void target_core_deregister_fabric( 271 struct config_group *group, 272 struct config_item *item) 273 { 274 struct target_fabric_configfs *tf = container_of( 275 to_config_group(item), struct target_fabric_configfs, tf_group); 276 277 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in" 278 " tf list\n", config_item_name(item)); 279 280 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:" 281 " %s\n", tf->tf_ops->fabric_name); 282 atomic_dec(&tf->tf_access_cnt); 283 284 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci" 285 " %s\n", config_item_name(item)); 286 287 configfs_remove_default_groups(&tf->tf_group); 288 config_item_put(item); 289 } 290 291 static struct configfs_group_operations target_core_fabric_group_ops = { 292 .make_group = &target_core_register_fabric, 293 .drop_item = &target_core_deregister_fabric, 294 }; 295 296 /* 297 * All item attributes appearing in /sys/kernel/target/ appear here. 298 */ 299 static struct configfs_attribute *target_core_fabric_item_attrs[] = { 300 &target_core_item_attr_version, 301 &target_core_item_attr_dbroot, 302 NULL, 303 }; 304 305 /* 306 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/ 307 */ 308 static const struct config_item_type target_core_fabrics_item = { 309 .ct_group_ops = &target_core_fabric_group_ops, 310 .ct_attrs = target_core_fabric_item_attrs, 311 .ct_owner = THIS_MODULE, 312 }; 313 314 static struct configfs_subsystem target_core_fabrics = { 315 .su_group = { 316 .cg_item = { 317 .ci_namebuf = "target", 318 .ci_type = &target_core_fabrics_item, 319 }, 320 }, 321 }; 322 323 int target_depend_item(struct config_item *item) 324 { 325 return configfs_depend_item(&target_core_fabrics, item); 326 } 327 EXPORT_SYMBOL(target_depend_item); 328 329 void target_undepend_item(struct config_item *item) 330 { 331 return configfs_undepend_item(item); 332 } 333 EXPORT_SYMBOL(target_undepend_item); 334 335 /*############################################################################## 336 // Start functions called by external Target Fabrics Modules 337 //############################################################################*/ 338 static int target_disable_feature(struct se_portal_group *se_tpg) 339 { 340 return 0; 341 } 342 343 static u32 target_default_get_inst_index(struct se_portal_group *se_tpg) 344 { 345 return 1; 346 } 347 348 static u32 target_default_sess_get_index(struct se_session *se_sess) 349 { 350 return 0; 351 } 352 353 static void target_set_default_node_attributes(struct se_node_acl *se_acl) 354 { 355 } 356 357 static int target_default_get_cmd_state(struct se_cmd *se_cmd) 358 { 359 return 0; 360 } 361 362 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo) 363 { 364 if (tfo->fabric_alias) { 365 if (strlen(tfo->fabric_alias) >= TARGET_FABRIC_NAME_SIZE) { 366 pr_err("Passed alias: %s exceeds " 367 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_alias); 368 return -EINVAL; 369 } 370 } 371 if (!tfo->fabric_name) { 372 pr_err("Missing tfo->fabric_name\n"); 373 return -EINVAL; 374 } 375 if (strlen(tfo->fabric_name) >= TARGET_FABRIC_NAME_SIZE) { 376 pr_err("Passed name: %s exceeds " 377 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_name); 378 return -EINVAL; 379 } 380 if (!tfo->tpg_get_wwn) { 381 pr_err("Missing tfo->tpg_get_wwn()\n"); 382 return -EINVAL; 383 } 384 if (!tfo->tpg_get_tag) { 385 pr_err("Missing tfo->tpg_get_tag()\n"); 386 return -EINVAL; 387 } 388 if (!tfo->release_cmd) { 389 pr_err("Missing tfo->release_cmd()\n"); 390 return -EINVAL; 391 } 392 if (!tfo->write_pending) { 393 pr_err("Missing tfo->write_pending()\n"); 394 return -EINVAL; 395 } 396 if (!tfo->queue_data_in) { 397 pr_err("Missing tfo->queue_data_in()\n"); 398 return -EINVAL; 399 } 400 if (!tfo->queue_status) { 401 pr_err("Missing tfo->queue_status()\n"); 402 return -EINVAL; 403 } 404 if (!tfo->queue_tm_rsp) { 405 pr_err("Missing tfo->queue_tm_rsp()\n"); 406 return -EINVAL; 407 } 408 if (!tfo->aborted_task) { 409 pr_err("Missing tfo->aborted_task()\n"); 410 return -EINVAL; 411 } 412 if (!tfo->check_stop_free) { 413 pr_err("Missing tfo->check_stop_free()\n"); 414 return -EINVAL; 415 } 416 /* 417 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn() 418 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in 419 * target_core_fabric_configfs.c WWN+TPG group context code. 420 */ 421 if (!tfo->fabric_make_wwn) { 422 pr_err("Missing tfo->fabric_make_wwn()\n"); 423 return -EINVAL; 424 } 425 if (!tfo->fabric_drop_wwn) { 426 pr_err("Missing tfo->fabric_drop_wwn()\n"); 427 return -EINVAL; 428 } 429 if (!tfo->fabric_make_tpg) { 430 pr_err("Missing tfo->fabric_make_tpg()\n"); 431 return -EINVAL; 432 } 433 if (!tfo->fabric_drop_tpg) { 434 pr_err("Missing tfo->fabric_drop_tpg()\n"); 435 return -EINVAL; 436 } 437 438 return 0; 439 } 440 441 static void target_set_default_ops(struct target_core_fabric_ops *tfo) 442 { 443 if (!tfo->tpg_check_demo_mode) 444 tfo->tpg_check_demo_mode = target_disable_feature; 445 446 if (!tfo->tpg_check_demo_mode_cache) 447 tfo->tpg_check_demo_mode_cache = target_disable_feature; 448 449 if (!tfo->tpg_check_demo_mode_write_protect) 450 tfo->tpg_check_demo_mode_write_protect = target_disable_feature; 451 452 if (!tfo->tpg_check_prod_mode_write_protect) 453 tfo->tpg_check_prod_mode_write_protect = target_disable_feature; 454 455 if (!tfo->tpg_get_inst_index) 456 tfo->tpg_get_inst_index = target_default_get_inst_index; 457 458 if (!tfo->sess_get_index) 459 tfo->sess_get_index = target_default_sess_get_index; 460 461 if (!tfo->set_default_node_attributes) 462 tfo->set_default_node_attributes = target_set_default_node_attributes; 463 464 if (!tfo->get_cmd_state) 465 tfo->get_cmd_state = target_default_get_cmd_state; 466 } 467 468 int target_register_template(const struct target_core_fabric_ops *fo) 469 { 470 struct target_core_fabric_ops *tfo; 471 struct target_fabric_configfs *tf; 472 int ret; 473 474 ret = target_fabric_tf_ops_check(fo); 475 if (ret) 476 return ret; 477 478 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL); 479 if (!tf) { 480 pr_err("%s: could not allocate memory!\n", __func__); 481 return -ENOMEM; 482 } 483 tfo = kzalloc(sizeof(struct target_core_fabric_ops), GFP_KERNEL); 484 if (!tfo) { 485 kfree(tf); 486 pr_err("%s: could not allocate memory!\n", __func__); 487 return -ENOMEM; 488 } 489 memcpy(tfo, fo, sizeof(*tfo)); 490 target_set_default_ops(tfo); 491 492 INIT_LIST_HEAD(&tf->tf_list); 493 atomic_set(&tf->tf_access_cnt, 0); 494 tf->tf_ops = tfo; 495 target_fabric_setup_cits(tf); 496 497 mutex_lock(&g_tf_lock); 498 list_add_tail(&tf->tf_list, &g_tf_list); 499 mutex_unlock(&g_tf_lock); 500 501 return 0; 502 } 503 EXPORT_SYMBOL(target_register_template); 504 505 void target_unregister_template(const struct target_core_fabric_ops *fo) 506 { 507 struct target_fabric_configfs *t; 508 509 mutex_lock(&g_tf_lock); 510 list_for_each_entry(t, &g_tf_list, tf_list) { 511 if (!strcmp(t->tf_ops->fabric_name, fo->fabric_name)) { 512 BUG_ON(atomic_read(&t->tf_access_cnt)); 513 list_del(&t->tf_list); 514 mutex_unlock(&g_tf_lock); 515 /* 516 * Wait for any outstanding fabric se_deve_entry->rcu_head 517 * callbacks to complete post kfree_rcu(), before allowing 518 * fabric driver unload of TFO->module to proceed. 519 */ 520 rcu_barrier(); 521 kfree(t->tf_tpg_base_cit.ct_attrs); 522 kfree(t->tf_ops); 523 kfree(t); 524 return; 525 } 526 } 527 mutex_unlock(&g_tf_lock); 528 } 529 EXPORT_SYMBOL(target_unregister_template); 530 531 /*############################################################################## 532 // Stop functions called by external Target Fabrics Modules 533 //############################################################################*/ 534 535 static inline struct se_dev_attrib *to_attrib(struct config_item *item) 536 { 537 return container_of(to_config_group(item), struct se_dev_attrib, 538 da_group); 539 } 540 541 /* Start functions for struct config_item_type tb_dev_attrib_cit */ 542 #define DEF_CONFIGFS_ATTRIB_SHOW(_name) \ 543 static ssize_t _name##_show(struct config_item *item, char *page) \ 544 { \ 545 return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \ 546 } 547 548 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias); 549 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo); 550 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write); 551 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read); 552 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache); 553 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl); 554 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas); 555 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu); 556 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws); 557 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw); 558 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc); 559 DEF_CONFIGFS_ATTRIB_SHOW(emulate_pr); 560 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type); 561 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type); 562 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify); 563 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids); 564 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot); 565 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord); 566 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl); 567 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size); 568 DEF_CONFIGFS_ATTRIB_SHOW(block_size); 569 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors); 570 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors); 571 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth); 572 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth); 573 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count); 574 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count); 575 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity); 576 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment); 577 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data); 578 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len); 579 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rsoc); 580 DEF_CONFIGFS_ATTRIB_SHOW(submit_type); 581 582 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \ 583 static ssize_t _name##_store(struct config_item *item, const char *page,\ 584 size_t count) \ 585 { \ 586 struct se_dev_attrib *da = to_attrib(item); \ 587 u32 val; \ 588 int ret; \ 589 \ 590 ret = kstrtou32(page, 0, &val); \ 591 if (ret < 0) \ 592 return ret; \ 593 da->_name = val; \ 594 return count; \ 595 } 596 597 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count); 598 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count); 599 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity); 600 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment); 601 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len); 602 603 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \ 604 static ssize_t _name##_store(struct config_item *item, const char *page, \ 605 size_t count) \ 606 { \ 607 struct se_dev_attrib *da = to_attrib(item); \ 608 bool flag; \ 609 int ret; \ 610 \ 611 ret = kstrtobool(page, &flag); \ 612 if (ret < 0) \ 613 return ret; \ 614 da->_name = flag; \ 615 return count; \ 616 } 617 618 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write); 619 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw); 620 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc); 621 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr); 622 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids); 623 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot); 624 625 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \ 626 static ssize_t _name##_store(struct config_item *item, const char *page,\ 627 size_t count) \ 628 { \ 629 printk_once(KERN_WARNING \ 630 "ignoring deprecated %s attribute\n", \ 631 __stringify(_name)); \ 632 return count; \ 633 } 634 635 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo); 636 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read); 637 638 static void dev_set_t10_wwn_model_alias(struct se_device *dev) 639 { 640 const char *configname; 641 642 configname = config_item_name(&dev->dev_group.cg_item); 643 if (strlen(configname) >= INQUIRY_MODEL_LEN) { 644 pr_warn("dev[%p]: Backstore name '%s' is too long for " 645 "INQUIRY_MODEL, truncating to 15 characters\n", dev, 646 configname); 647 } 648 /* 649 * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1) 650 * here without potentially breaking existing setups, so continue to 651 * truncate one byte shorter than what can be carried in INQUIRY. 652 */ 653 strscpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN); 654 } 655 656 static ssize_t emulate_model_alias_store(struct config_item *item, 657 const char *page, size_t count) 658 { 659 struct se_dev_attrib *da = to_attrib(item); 660 struct se_device *dev = da->da_dev; 661 bool flag; 662 int ret; 663 664 if (dev->export_count) { 665 pr_err("dev[%p]: Unable to change model alias" 666 " while export_count is %d\n", 667 dev, dev->export_count); 668 return -EINVAL; 669 } 670 671 ret = kstrtobool(page, &flag); 672 if (ret < 0) 673 return ret; 674 675 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); 676 if (flag) 677 dev_set_t10_wwn_model_alias(dev); 678 else 679 strscpy(dev->t10_wwn.model, dev->transport->inquiry_prod); 680 da->emulate_model_alias = flag; 681 return count; 682 } 683 684 static ssize_t emulate_write_cache_store(struct config_item *item, 685 const char *page, size_t count) 686 { 687 struct se_dev_attrib *da = to_attrib(item); 688 bool flag; 689 int ret; 690 691 ret = kstrtobool(page, &flag); 692 if (ret < 0) 693 return ret; 694 695 if (flag && da->da_dev->transport->get_write_cache) { 696 pr_err("emulate_write_cache not supported for this device\n"); 697 return -EINVAL; 698 } 699 700 da->emulate_write_cache = flag; 701 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 702 da->da_dev, flag); 703 return count; 704 } 705 706 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item, 707 const char *page, size_t count) 708 { 709 struct se_dev_attrib *da = to_attrib(item); 710 u32 val; 711 int ret; 712 713 ret = kstrtou32(page, 0, &val); 714 if (ret < 0) 715 return ret; 716 717 if (val != TARGET_UA_INTLCK_CTRL_CLEAR 718 && val != TARGET_UA_INTLCK_CTRL_NO_CLEAR 719 && val != TARGET_UA_INTLCK_CTRL_ESTABLISH_UA) { 720 pr_err("Illegal value %d\n", val); 721 return -EINVAL; 722 } 723 724 if (da->da_dev->export_count) { 725 pr_err("dev[%p]: Unable to change SE Device" 726 " UA_INTRLCK_CTRL while export_count is %d\n", 727 da->da_dev, da->da_dev->export_count); 728 return -EINVAL; 729 } 730 da->emulate_ua_intlck_ctrl = val; 731 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 732 da->da_dev, val); 733 return count; 734 } 735 736 static ssize_t emulate_tas_store(struct config_item *item, 737 const char *page, size_t count) 738 { 739 struct se_dev_attrib *da = to_attrib(item); 740 bool flag; 741 int ret; 742 743 ret = kstrtobool(page, &flag); 744 if (ret < 0) 745 return ret; 746 747 if (da->da_dev->export_count) { 748 pr_err("dev[%p]: Unable to change SE Device TAS while" 749 " export_count is %d\n", 750 da->da_dev, da->da_dev->export_count); 751 return -EINVAL; 752 } 753 da->emulate_tas = flag; 754 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 755 da->da_dev, flag ? "Enabled" : "Disabled"); 756 757 return count; 758 } 759 760 static int target_try_configure_unmap(struct se_device *dev, 761 const char *config_opt) 762 { 763 if (!dev->transport->configure_unmap) { 764 pr_err("Generic Block Discard not supported\n"); 765 return -ENOSYS; 766 } 767 768 if (!target_dev_configured(dev)) { 769 pr_err("Generic Block Discard setup for %s requires device to be configured\n", 770 config_opt); 771 return -ENODEV; 772 } 773 774 if (!dev->transport->configure_unmap(dev)) { 775 pr_err("Generic Block Discard setup for %s failed\n", 776 config_opt); 777 return -ENOSYS; 778 } 779 780 return 0; 781 } 782 783 static ssize_t emulate_tpu_store(struct config_item *item, 784 const char *page, size_t count) 785 { 786 struct se_dev_attrib *da = to_attrib(item); 787 struct se_device *dev = da->da_dev; 788 bool flag; 789 int ret; 790 791 ret = kstrtobool(page, &flag); 792 if (ret < 0) 793 return ret; 794 795 /* 796 * We expect this value to be non-zero when generic Block Layer 797 * Discard supported is detected iblock_create_virtdevice(). 798 */ 799 if (flag && !da->max_unmap_block_desc_count) { 800 ret = target_try_configure_unmap(dev, "emulate_tpu"); 801 if (ret) 802 return ret; 803 } 804 805 da->emulate_tpu = flag; 806 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 807 da->da_dev, flag); 808 return count; 809 } 810 811 static ssize_t emulate_tpws_store(struct config_item *item, 812 const char *page, size_t count) 813 { 814 struct se_dev_attrib *da = to_attrib(item); 815 struct se_device *dev = da->da_dev; 816 bool flag; 817 int ret; 818 819 ret = kstrtobool(page, &flag); 820 if (ret < 0) 821 return ret; 822 823 /* 824 * We expect this value to be non-zero when generic Block Layer 825 * Discard supported is detected iblock_create_virtdevice(). 826 */ 827 if (flag && !da->max_unmap_block_desc_count) { 828 ret = target_try_configure_unmap(dev, "emulate_tpws"); 829 if (ret) 830 return ret; 831 } 832 833 da->emulate_tpws = flag; 834 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 835 da->da_dev, flag); 836 return count; 837 } 838 839 static ssize_t pi_prot_type_store(struct config_item *item, 840 const char *page, size_t count) 841 { 842 struct se_dev_attrib *da = to_attrib(item); 843 int old_prot = da->pi_prot_type, ret; 844 struct se_device *dev = da->da_dev; 845 u32 flag; 846 847 ret = kstrtou32(page, 0, &flag); 848 if (ret < 0) 849 return ret; 850 851 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) { 852 pr_err("Illegal value %d for pi_prot_type\n", flag); 853 return -EINVAL; 854 } 855 if (flag == 2) { 856 pr_err("DIF TYPE2 protection currently not supported\n"); 857 return -ENOSYS; 858 } 859 if (da->hw_pi_prot_type) { 860 pr_warn("DIF protection enabled on underlying hardware," 861 " ignoring\n"); 862 return count; 863 } 864 if (!dev->transport->init_prot || !dev->transport->free_prot) { 865 /* 0 is only allowed value for non-supporting backends */ 866 if (flag == 0) 867 return count; 868 869 pr_err("DIF protection not supported by backend: %s\n", 870 dev->transport->name); 871 return -ENOSYS; 872 } 873 if (!target_dev_configured(dev)) { 874 pr_err("DIF protection requires device to be configured\n"); 875 return -ENODEV; 876 } 877 if (dev->export_count) { 878 pr_err("dev[%p]: Unable to change SE Device PROT type while" 879 " export_count is %d\n", dev, dev->export_count); 880 return -EINVAL; 881 } 882 883 da->pi_prot_type = flag; 884 885 if (flag && !old_prot) { 886 ret = dev->transport->init_prot(dev); 887 if (ret) { 888 da->pi_prot_type = old_prot; 889 da->pi_prot_verify = (bool) da->pi_prot_type; 890 return ret; 891 } 892 893 } else if (!flag && old_prot) { 894 dev->transport->free_prot(dev); 895 } 896 897 da->pi_prot_verify = (bool) da->pi_prot_type; 898 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag); 899 return count; 900 } 901 902 /* always zero, but attr needs to remain RW to avoid userspace breakage */ 903 static ssize_t pi_prot_format_show(struct config_item *item, char *page) 904 { 905 return snprintf(page, PAGE_SIZE, "0\n"); 906 } 907 908 static ssize_t pi_prot_format_store(struct config_item *item, 909 const char *page, size_t count) 910 { 911 struct se_dev_attrib *da = to_attrib(item); 912 struct se_device *dev = da->da_dev; 913 bool flag; 914 int ret; 915 916 ret = kstrtobool(page, &flag); 917 if (ret < 0) 918 return ret; 919 920 if (!flag) 921 return count; 922 923 if (!dev->transport->format_prot) { 924 pr_err("DIF protection format not supported by backend %s\n", 925 dev->transport->name); 926 return -ENOSYS; 927 } 928 if (!target_dev_configured(dev)) { 929 pr_err("DIF protection format requires device to be configured\n"); 930 return -ENODEV; 931 } 932 if (dev->export_count) { 933 pr_err("dev[%p]: Unable to format SE Device PROT type while" 934 " export_count is %d\n", dev, dev->export_count); 935 return -EINVAL; 936 } 937 938 ret = dev->transport->format_prot(dev); 939 if (ret) 940 return ret; 941 942 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev); 943 return count; 944 } 945 946 static ssize_t pi_prot_verify_store(struct config_item *item, 947 const char *page, size_t count) 948 { 949 struct se_dev_attrib *da = to_attrib(item); 950 bool flag; 951 int ret; 952 953 ret = kstrtobool(page, &flag); 954 if (ret < 0) 955 return ret; 956 957 if (!flag) { 958 da->pi_prot_verify = flag; 959 return count; 960 } 961 if (da->hw_pi_prot_type) { 962 pr_warn("DIF protection enabled on underlying hardware," 963 " ignoring\n"); 964 return count; 965 } 966 if (!da->pi_prot_type) { 967 pr_warn("DIF protection not supported by backend, ignoring\n"); 968 return count; 969 } 970 da->pi_prot_verify = flag; 971 972 return count; 973 } 974 975 static ssize_t force_pr_aptpl_store(struct config_item *item, 976 const char *page, size_t count) 977 { 978 struct se_dev_attrib *da = to_attrib(item); 979 bool flag; 980 int ret; 981 982 ret = kstrtobool(page, &flag); 983 if (ret < 0) 984 return ret; 985 if (da->da_dev->export_count) { 986 pr_err("dev[%p]: Unable to set force_pr_aptpl while" 987 " export_count is %d\n", 988 da->da_dev, da->da_dev->export_count); 989 return -EINVAL; 990 } 991 992 da->force_pr_aptpl = flag; 993 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag); 994 return count; 995 } 996 997 static ssize_t emulate_rest_reord_store(struct config_item *item, 998 const char *page, size_t count) 999 { 1000 struct se_dev_attrib *da = to_attrib(item); 1001 bool flag; 1002 int ret; 1003 1004 ret = kstrtobool(page, &flag); 1005 if (ret < 0) 1006 return ret; 1007 1008 if (flag != 0) { 1009 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted" 1010 " reordering not implemented\n", da->da_dev); 1011 return -ENOSYS; 1012 } 1013 da->emulate_rest_reord = flag; 1014 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", 1015 da->da_dev, flag); 1016 return count; 1017 } 1018 1019 static ssize_t unmap_zeroes_data_store(struct config_item *item, 1020 const char *page, size_t count) 1021 { 1022 struct se_dev_attrib *da = to_attrib(item); 1023 struct se_device *dev = da->da_dev; 1024 bool flag; 1025 int ret; 1026 1027 ret = kstrtobool(page, &flag); 1028 if (ret < 0) 1029 return ret; 1030 1031 if (da->da_dev->export_count) { 1032 pr_err("dev[%p]: Unable to change SE Device" 1033 " unmap_zeroes_data while export_count is %d\n", 1034 da->da_dev, da->da_dev->export_count); 1035 return -EINVAL; 1036 } 1037 /* 1038 * We expect this value to be non-zero when generic Block Layer 1039 * Discard supported is detected iblock_configure_device(). 1040 */ 1041 if (flag && !da->max_unmap_block_desc_count) { 1042 ret = target_try_configure_unmap(dev, "unmap_zeroes_data"); 1043 if (ret) 1044 return ret; 1045 } 1046 da->unmap_zeroes_data = flag; 1047 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n", 1048 da->da_dev, flag); 1049 return count; 1050 } 1051 1052 /* 1053 * Note, this can only be called on unexported SE Device Object. 1054 */ 1055 static ssize_t queue_depth_store(struct config_item *item, 1056 const char *page, size_t count) 1057 { 1058 struct se_dev_attrib *da = to_attrib(item); 1059 struct se_device *dev = da->da_dev; 1060 u32 val; 1061 int ret; 1062 1063 ret = kstrtou32(page, 0, &val); 1064 if (ret < 0) 1065 return ret; 1066 1067 if (dev->export_count) { 1068 pr_err("dev[%p]: Unable to change SE Device TCQ while" 1069 " export_count is %d\n", 1070 dev, dev->export_count); 1071 return -EINVAL; 1072 } 1073 if (!val) { 1074 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev); 1075 return -EINVAL; 1076 } 1077 1078 if (val > dev->dev_attrib.queue_depth) { 1079 if (val > dev->dev_attrib.hw_queue_depth) { 1080 pr_err("dev[%p]: Passed queue_depth:" 1081 " %u exceeds TCM/SE_Device MAX" 1082 " TCQ: %u\n", dev, val, 1083 dev->dev_attrib.hw_queue_depth); 1084 return -EINVAL; 1085 } 1086 } 1087 da->queue_depth = dev->queue_depth = val; 1088 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val); 1089 return count; 1090 } 1091 1092 static ssize_t optimal_sectors_store(struct config_item *item, 1093 const char *page, size_t count) 1094 { 1095 struct se_dev_attrib *da = to_attrib(item); 1096 u32 val; 1097 int ret; 1098 1099 ret = kstrtou32(page, 0, &val); 1100 if (ret < 0) 1101 return ret; 1102 1103 if (da->da_dev->export_count) { 1104 pr_err("dev[%p]: Unable to change SE Device" 1105 " optimal_sectors while export_count is %d\n", 1106 da->da_dev, da->da_dev->export_count); 1107 return -EINVAL; 1108 } 1109 if (val > da->hw_max_sectors) { 1110 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1111 " greater than hw_max_sectors: %u\n", 1112 da->da_dev, val, da->hw_max_sectors); 1113 return -EINVAL; 1114 } 1115 1116 da->optimal_sectors = val; 1117 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1118 da->da_dev, val); 1119 return count; 1120 } 1121 1122 static ssize_t block_size_store(struct config_item *item, 1123 const char *page, size_t count) 1124 { 1125 struct se_dev_attrib *da = to_attrib(item); 1126 u32 val; 1127 int ret; 1128 1129 ret = kstrtou32(page, 0, &val); 1130 if (ret < 0) 1131 return ret; 1132 1133 if (da->da_dev->export_count) { 1134 pr_err("dev[%p]: Unable to change SE Device block_size" 1135 " while export_count is %d\n", 1136 da->da_dev, da->da_dev->export_count); 1137 return -EINVAL; 1138 } 1139 1140 if (val != 512 && val != 1024 && val != 2048 && val != 4096) { 1141 pr_err("dev[%p]: Illegal value for block_device: %u" 1142 " for SE device, must be 512, 1024, 2048 or 4096\n", 1143 da->da_dev, val); 1144 return -EINVAL; 1145 } 1146 1147 da->block_size = val; 1148 1149 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1150 da->da_dev, val); 1151 return count; 1152 } 1153 1154 static ssize_t alua_support_show(struct config_item *item, char *page) 1155 { 1156 struct se_dev_attrib *da = to_attrib(item); 1157 u8 flags = da->da_dev->transport_flags; 1158 1159 return snprintf(page, PAGE_SIZE, "%d\n", 1160 flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1); 1161 } 1162 1163 static ssize_t alua_support_store(struct config_item *item, 1164 const char *page, size_t count) 1165 { 1166 struct se_dev_attrib *da = to_attrib(item); 1167 struct se_device *dev = da->da_dev; 1168 bool flag, oldflag; 1169 int ret; 1170 1171 ret = kstrtobool(page, &flag); 1172 if (ret < 0) 1173 return ret; 1174 1175 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA); 1176 if (flag == oldflag) 1177 return count; 1178 1179 if (!(dev->transport->transport_flags_changeable & 1180 TRANSPORT_FLAG_PASSTHROUGH_ALUA)) { 1181 pr_err("dev[%p]: Unable to change SE Device alua_support:" 1182 " alua_support has fixed value\n", dev); 1183 return -ENOSYS; 1184 } 1185 1186 if (flag) 1187 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_ALUA; 1188 else 1189 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_ALUA; 1190 return count; 1191 } 1192 1193 static ssize_t pgr_support_show(struct config_item *item, char *page) 1194 { 1195 struct se_dev_attrib *da = to_attrib(item); 1196 u8 flags = da->da_dev->transport_flags; 1197 1198 return snprintf(page, PAGE_SIZE, "%d\n", 1199 flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1); 1200 } 1201 1202 static ssize_t pgr_support_store(struct config_item *item, 1203 const char *page, size_t count) 1204 { 1205 struct se_dev_attrib *da = to_attrib(item); 1206 struct se_device *dev = da->da_dev; 1207 bool flag, oldflag; 1208 int ret; 1209 1210 ret = kstrtobool(page, &flag); 1211 if (ret < 0) 1212 return ret; 1213 1214 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR); 1215 if (flag == oldflag) 1216 return count; 1217 1218 if (!(dev->transport->transport_flags_changeable & 1219 TRANSPORT_FLAG_PASSTHROUGH_PGR)) { 1220 pr_err("dev[%p]: Unable to change SE Device pgr_support:" 1221 " pgr_support has fixed value\n", dev); 1222 return -ENOSYS; 1223 } 1224 1225 if (flag) 1226 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_PGR; 1227 else 1228 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_PGR; 1229 return count; 1230 } 1231 1232 static ssize_t emulate_rsoc_store(struct config_item *item, 1233 const char *page, size_t count) 1234 { 1235 struct se_dev_attrib *da = to_attrib(item); 1236 bool flag; 1237 int ret; 1238 1239 ret = kstrtobool(page, &flag); 1240 if (ret < 0) 1241 return ret; 1242 1243 da->emulate_rsoc = flag; 1244 pr_debug("dev[%p]: SE Device REPORT_SUPPORTED_OPERATION_CODES_EMULATION flag: %d\n", 1245 da->da_dev, flag); 1246 return count; 1247 } 1248 1249 static ssize_t submit_type_store(struct config_item *item, const char *page, 1250 size_t count) 1251 { 1252 struct se_dev_attrib *da = to_attrib(item); 1253 int ret; 1254 u8 val; 1255 1256 ret = kstrtou8(page, 0, &val); 1257 if (ret < 0) 1258 return ret; 1259 1260 if (val > TARGET_QUEUE_SUBMIT) 1261 return -EINVAL; 1262 1263 da->submit_type = val; 1264 return count; 1265 } 1266 1267 CONFIGFS_ATTR(, emulate_model_alias); 1268 CONFIGFS_ATTR(, emulate_dpo); 1269 CONFIGFS_ATTR(, emulate_fua_write); 1270 CONFIGFS_ATTR(, emulate_fua_read); 1271 CONFIGFS_ATTR(, emulate_write_cache); 1272 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl); 1273 CONFIGFS_ATTR(, emulate_tas); 1274 CONFIGFS_ATTR(, emulate_tpu); 1275 CONFIGFS_ATTR(, emulate_tpws); 1276 CONFIGFS_ATTR(, emulate_caw); 1277 CONFIGFS_ATTR(, emulate_3pc); 1278 CONFIGFS_ATTR(, emulate_pr); 1279 CONFIGFS_ATTR(, emulate_rsoc); 1280 CONFIGFS_ATTR(, pi_prot_type); 1281 CONFIGFS_ATTR_RO(, hw_pi_prot_type); 1282 CONFIGFS_ATTR(, pi_prot_format); 1283 CONFIGFS_ATTR(, pi_prot_verify); 1284 CONFIGFS_ATTR(, enforce_pr_isids); 1285 CONFIGFS_ATTR(, is_nonrot); 1286 CONFIGFS_ATTR(, emulate_rest_reord); 1287 CONFIGFS_ATTR(, force_pr_aptpl); 1288 CONFIGFS_ATTR_RO(, hw_block_size); 1289 CONFIGFS_ATTR(, block_size); 1290 CONFIGFS_ATTR_RO(, hw_max_sectors); 1291 CONFIGFS_ATTR(, optimal_sectors); 1292 CONFIGFS_ATTR_RO(, hw_queue_depth); 1293 CONFIGFS_ATTR(, queue_depth); 1294 CONFIGFS_ATTR(, max_unmap_lba_count); 1295 CONFIGFS_ATTR(, max_unmap_block_desc_count); 1296 CONFIGFS_ATTR(, unmap_granularity); 1297 CONFIGFS_ATTR(, unmap_granularity_alignment); 1298 CONFIGFS_ATTR(, unmap_zeroes_data); 1299 CONFIGFS_ATTR(, max_write_same_len); 1300 CONFIGFS_ATTR(, alua_support); 1301 CONFIGFS_ATTR(, pgr_support); 1302 CONFIGFS_ATTR(, submit_type); 1303 1304 /* 1305 * dev_attrib attributes for devices using the target core SBC/SPC 1306 * interpreter. Any backend using spc_parse_cdb should be using 1307 * these. 1308 */ 1309 struct configfs_attribute *sbc_attrib_attrs[] = { 1310 &attr_emulate_model_alias, 1311 &attr_emulate_dpo, 1312 &attr_emulate_fua_write, 1313 &attr_emulate_fua_read, 1314 &attr_emulate_write_cache, 1315 &attr_emulate_ua_intlck_ctrl, 1316 &attr_emulate_tas, 1317 &attr_emulate_tpu, 1318 &attr_emulate_tpws, 1319 &attr_emulate_caw, 1320 &attr_emulate_3pc, 1321 &attr_emulate_pr, 1322 &attr_pi_prot_type, 1323 &attr_hw_pi_prot_type, 1324 &attr_pi_prot_format, 1325 &attr_pi_prot_verify, 1326 &attr_enforce_pr_isids, 1327 &attr_is_nonrot, 1328 &attr_emulate_rest_reord, 1329 &attr_force_pr_aptpl, 1330 &attr_hw_block_size, 1331 &attr_block_size, 1332 &attr_hw_max_sectors, 1333 &attr_optimal_sectors, 1334 &attr_hw_queue_depth, 1335 &attr_queue_depth, 1336 &attr_max_unmap_lba_count, 1337 &attr_max_unmap_block_desc_count, 1338 &attr_unmap_granularity, 1339 &attr_unmap_granularity_alignment, 1340 &attr_unmap_zeroes_data, 1341 &attr_max_write_same_len, 1342 &attr_alua_support, 1343 &attr_pgr_support, 1344 &attr_emulate_rsoc, 1345 &attr_submit_type, 1346 NULL, 1347 }; 1348 EXPORT_SYMBOL(sbc_attrib_attrs); 1349 1350 /* 1351 * Minimal dev_attrib attributes for devices passing through CDBs. 1352 * In this case we only provide a few read-only attributes for 1353 * backwards compatibility. 1354 */ 1355 struct configfs_attribute *passthrough_attrib_attrs[] = { 1356 &attr_hw_pi_prot_type, 1357 &attr_hw_block_size, 1358 &attr_hw_max_sectors, 1359 &attr_hw_queue_depth, 1360 &attr_emulate_pr, 1361 &attr_alua_support, 1362 &attr_pgr_support, 1363 &attr_submit_type, 1364 NULL, 1365 }; 1366 EXPORT_SYMBOL(passthrough_attrib_attrs); 1367 1368 /* 1369 * pr related dev_attrib attributes for devices passing through CDBs, 1370 * but allowing in core pr emulation. 1371 */ 1372 struct configfs_attribute *passthrough_pr_attrib_attrs[] = { 1373 &attr_enforce_pr_isids, 1374 &attr_force_pr_aptpl, 1375 NULL, 1376 }; 1377 EXPORT_SYMBOL(passthrough_pr_attrib_attrs); 1378 1379 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL); 1380 TB_CIT_SETUP_DRV(dev_action, NULL, NULL); 1381 1382 /* End functions for struct config_item_type tb_dev_attrib_cit */ 1383 1384 /* Start functions for struct config_item_type tb_dev_wwn_cit */ 1385 1386 static struct t10_wwn *to_t10_wwn(struct config_item *item) 1387 { 1388 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group); 1389 } 1390 1391 static ssize_t target_check_inquiry_data(char *buf) 1392 { 1393 size_t len; 1394 int i; 1395 1396 len = strlen(buf); 1397 1398 /* 1399 * SPC 4.3.1: 1400 * ASCII data fields shall contain only ASCII printable characters 1401 * (i.e., code values 20h to 7Eh) and may be terminated with one or 1402 * more ASCII null (00h) characters. 1403 */ 1404 for (i = 0; i < len; i++) { 1405 if (buf[i] < 0x20 || buf[i] > 0x7E) { 1406 pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n"); 1407 return -EINVAL; 1408 } 1409 } 1410 1411 return len; 1412 } 1413 1414 /* 1415 * STANDARD and VPD page 0x83 T10 Vendor Identification 1416 */ 1417 static ssize_t target_wwn_vendor_id_show(struct config_item *item, 1418 char *page) 1419 { 1420 return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]); 1421 } 1422 1423 static ssize_t target_wwn_vendor_id_store(struct config_item *item, 1424 const char *page, size_t count) 1425 { 1426 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1427 struct se_device *dev = t10_wwn->t10_dev; 1428 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1429 unsigned char buf[INQUIRY_VENDOR_LEN + 2]; 1430 char *stripped = NULL; 1431 ssize_t len; 1432 ssize_t ret; 1433 1434 len = strscpy(buf, page); 1435 if (len > 0) { 1436 /* Strip any newline added from userspace. */ 1437 stripped = strstrip(buf); 1438 len = strlen(stripped); 1439 } 1440 if (len < 0 || len > INQUIRY_VENDOR_LEN) { 1441 pr_err("Emulated T10 Vendor Identification exceeds" 1442 " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN) 1443 "\n"); 1444 return -EOVERFLOW; 1445 } 1446 1447 ret = target_check_inquiry_data(stripped); 1448 1449 if (ret < 0) 1450 return ret; 1451 1452 /* 1453 * Check to see if any active exports exist. If they do exist, fail 1454 * here as changing this information on the fly (underneath the 1455 * initiator side OS dependent multipath code) could cause negative 1456 * effects. 1457 */ 1458 if (dev->export_count) { 1459 pr_err("Unable to set T10 Vendor Identification while" 1460 " active %d exports exist\n", dev->export_count); 1461 return -EINVAL; 1462 } 1463 1464 BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1); 1465 strscpy(dev->t10_wwn.vendor, stripped); 1466 1467 pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:" 1468 " %s\n", dev->t10_wwn.vendor); 1469 1470 return count; 1471 } 1472 1473 static ssize_t target_wwn_product_id_show(struct config_item *item, 1474 char *page) 1475 { 1476 return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]); 1477 } 1478 1479 static ssize_t target_wwn_product_id_store(struct config_item *item, 1480 const char *page, size_t count) 1481 { 1482 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1483 struct se_device *dev = t10_wwn->t10_dev; 1484 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1485 unsigned char buf[INQUIRY_MODEL_LEN + 2]; 1486 char *stripped = NULL; 1487 ssize_t len; 1488 ssize_t ret; 1489 1490 len = strscpy(buf, page); 1491 if (len > 0) { 1492 /* Strip any newline added from userspace. */ 1493 stripped = strstrip(buf); 1494 len = strlen(stripped); 1495 } 1496 if (len < 0 || len > INQUIRY_MODEL_LEN) { 1497 pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: " 1498 __stringify(INQUIRY_MODEL_LEN) 1499 "\n"); 1500 return -EOVERFLOW; 1501 } 1502 1503 ret = target_check_inquiry_data(stripped); 1504 1505 if (ret < 0) 1506 return ret; 1507 1508 /* 1509 * Check to see if any active exports exist. If they do exist, fail 1510 * here as changing this information on the fly (underneath the 1511 * initiator side OS dependent multipath code) could cause negative 1512 * effects. 1513 */ 1514 if (dev->export_count) { 1515 pr_err("Unable to set T10 Model while active %d exports exist\n", 1516 dev->export_count); 1517 return -EINVAL; 1518 } 1519 1520 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); 1521 strscpy(dev->t10_wwn.model, stripped); 1522 1523 pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n", 1524 dev->t10_wwn.model); 1525 1526 return count; 1527 } 1528 1529 static ssize_t target_wwn_revision_show(struct config_item *item, 1530 char *page) 1531 { 1532 return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]); 1533 } 1534 1535 static ssize_t target_wwn_revision_store(struct config_item *item, 1536 const char *page, size_t count) 1537 { 1538 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1539 struct se_device *dev = t10_wwn->t10_dev; 1540 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1541 unsigned char buf[INQUIRY_REVISION_LEN + 2]; 1542 char *stripped = NULL; 1543 ssize_t len; 1544 ssize_t ret; 1545 1546 len = strscpy(buf, page); 1547 if (len > 0) { 1548 /* Strip any newline added from userspace. */ 1549 stripped = strstrip(buf); 1550 len = strlen(stripped); 1551 } 1552 if (len < 0 || len > INQUIRY_REVISION_LEN) { 1553 pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: " 1554 __stringify(INQUIRY_REVISION_LEN) 1555 "\n"); 1556 return -EOVERFLOW; 1557 } 1558 1559 ret = target_check_inquiry_data(stripped); 1560 1561 if (ret < 0) 1562 return ret; 1563 1564 /* 1565 * Check to see if any active exports exist. If they do exist, fail 1566 * here as changing this information on the fly (underneath the 1567 * initiator side OS dependent multipath code) could cause negative 1568 * effects. 1569 */ 1570 if (dev->export_count) { 1571 pr_err("Unable to set T10 Revision while active %d exports exist\n", 1572 dev->export_count); 1573 return -EINVAL; 1574 } 1575 1576 BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1); 1577 strscpy(dev->t10_wwn.revision, stripped); 1578 1579 pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n", 1580 dev->t10_wwn.revision); 1581 1582 return count; 1583 } 1584 1585 static ssize_t 1586 target_wwn_company_id_show(struct config_item *item, 1587 char *page) 1588 { 1589 return snprintf(page, PAGE_SIZE, "%#08x\n", 1590 to_t10_wwn(item)->company_id); 1591 } 1592 1593 static ssize_t 1594 target_wwn_company_id_store(struct config_item *item, 1595 const char *page, size_t count) 1596 { 1597 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1598 struct se_device *dev = t10_wwn->t10_dev; 1599 u32 val; 1600 int ret; 1601 1602 /* 1603 * The IEEE COMPANY_ID field should contain a 24-bit canonical 1604 * form OUI assigned by the IEEE. 1605 */ 1606 ret = kstrtou32(page, 0, &val); 1607 if (ret < 0) 1608 return ret; 1609 1610 if (val >= 0x1000000) 1611 return -EOVERFLOW; 1612 1613 /* 1614 * Check to see if any active exports exist. If they do exist, fail 1615 * here as changing this information on the fly (underneath the 1616 * initiator side OS dependent multipath code) could cause negative 1617 * effects. 1618 */ 1619 if (dev->export_count) { 1620 pr_err("Unable to set Company ID while %u exports exist\n", 1621 dev->export_count); 1622 return -EINVAL; 1623 } 1624 1625 t10_wwn->company_id = val; 1626 1627 pr_debug("Target_Core_ConfigFS: Set IEEE Company ID: %#08x\n", 1628 t10_wwn->company_id); 1629 1630 return count; 1631 } 1632 1633 /* 1634 * VPD page 0x80 Unit serial 1635 */ 1636 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item, 1637 char *page) 1638 { 1639 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 1640 &to_t10_wwn(item)->unit_serial[0]); 1641 } 1642 1643 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item, 1644 const char *page, size_t count) 1645 { 1646 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1647 struct se_device *dev = t10_wwn->t10_dev; 1648 unsigned char buf[INQUIRY_VPD_SERIAL_LEN] = { }; 1649 1650 /* 1651 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 1652 * from the struct scsi_device level firmware, do not allow 1653 * VPD Unit Serial to be emulated. 1654 * 1655 * Note this struct scsi_device could also be emulating VPD 1656 * information from its drivers/scsi LLD. But for now we assume 1657 * it is doing 'the right thing' wrt a world wide unique 1658 * VPD Unit Serial Number that OS dependent multipath can depend on. 1659 */ 1660 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) { 1661 pr_err("Underlying SCSI device firmware provided VPD" 1662 " Unit Serial, ignoring request\n"); 1663 return -EOPNOTSUPP; 1664 } 1665 1666 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 1667 pr_err("Emulated VPD Unit Serial exceeds" 1668 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 1669 return -EOVERFLOW; 1670 } 1671 /* 1672 * Check to see if any active $FABRIC_MOD exports exist. If they 1673 * do exist, fail here as changing this information on the fly 1674 * (underneath the initiator side OS dependent multipath code) 1675 * could cause negative effects. 1676 */ 1677 if (dev->export_count) { 1678 pr_err("Unable to set VPD Unit Serial while" 1679 " active %d $FABRIC_MOD exports exist\n", 1680 dev->export_count); 1681 return -EINVAL; 1682 } 1683 1684 /* 1685 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 1686 * 1687 * Also, strip any newline added from the userspace 1688 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 1689 */ 1690 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 1691 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 1692 "%s", strstrip(buf)); 1693 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL; 1694 1695 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 1696 " %s\n", dev->t10_wwn.unit_serial); 1697 1698 return count; 1699 } 1700 1701 /* 1702 * VPD page 0x83 Protocol Identifier 1703 */ 1704 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item, 1705 char *page) 1706 { 1707 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1708 struct t10_vpd *vpd; 1709 unsigned char buf[VPD_TMP_BUF_SIZE] = { }; 1710 ssize_t len = 0; 1711 1712 spin_lock(&t10_wwn->t10_vpd_lock); 1713 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 1714 if (!vpd->protocol_identifier_set) 1715 continue; 1716 1717 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 1718 1719 if (len + strlen(buf) >= PAGE_SIZE) 1720 break; 1721 1722 len += sprintf(page+len, "%s", buf); 1723 } 1724 spin_unlock(&t10_wwn->t10_vpd_lock); 1725 1726 return len; 1727 } 1728 1729 /* 1730 * Generic wrapper for dumping VPD identifiers by association. 1731 */ 1732 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 1733 static ssize_t target_wwn_##_name##_show(struct config_item *item, \ 1734 char *page) \ 1735 { \ 1736 struct t10_wwn *t10_wwn = to_t10_wwn(item); \ 1737 struct t10_vpd *vpd; \ 1738 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 1739 ssize_t len = 0; \ 1740 \ 1741 spin_lock(&t10_wwn->t10_vpd_lock); \ 1742 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 1743 if (vpd->association != _assoc) \ 1744 continue; \ 1745 \ 1746 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1747 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 1748 if (len + strlen(buf) >= PAGE_SIZE) \ 1749 break; \ 1750 len += sprintf(page+len, "%s", buf); \ 1751 \ 1752 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1753 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 1754 if (len + strlen(buf) >= PAGE_SIZE) \ 1755 break; \ 1756 len += sprintf(page+len, "%s", buf); \ 1757 \ 1758 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1759 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 1760 if (len + strlen(buf) >= PAGE_SIZE) \ 1761 break; \ 1762 len += sprintf(page+len, "%s", buf); \ 1763 } \ 1764 spin_unlock(&t10_wwn->t10_vpd_lock); \ 1765 \ 1766 return len; \ 1767 } 1768 1769 /* VPD page 0x83 Association: Logical Unit */ 1770 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 1771 /* VPD page 0x83 Association: Target Port */ 1772 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 1773 /* VPD page 0x83 Association: SCSI Target Device */ 1774 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 1775 1776 CONFIGFS_ATTR(target_wwn_, vendor_id); 1777 CONFIGFS_ATTR(target_wwn_, product_id); 1778 CONFIGFS_ATTR(target_wwn_, revision); 1779 CONFIGFS_ATTR(target_wwn_, company_id); 1780 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial); 1781 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier); 1782 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit); 1783 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port); 1784 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device); 1785 1786 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 1787 &target_wwn_attr_vendor_id, 1788 &target_wwn_attr_product_id, 1789 &target_wwn_attr_revision, 1790 &target_wwn_attr_company_id, 1791 &target_wwn_attr_vpd_unit_serial, 1792 &target_wwn_attr_vpd_protocol_identifier, 1793 &target_wwn_attr_vpd_assoc_logical_unit, 1794 &target_wwn_attr_vpd_assoc_target_port, 1795 &target_wwn_attr_vpd_assoc_scsi_target_device, 1796 NULL, 1797 }; 1798 1799 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs); 1800 1801 /* End functions for struct config_item_type tb_dev_wwn_cit */ 1802 1803 /* Start functions for struct config_item_type tb_dev_pr_cit */ 1804 1805 static struct se_device *pr_to_dev(struct config_item *item) 1806 { 1807 return container_of(to_config_group(item), struct se_device, 1808 dev_pr_group); 1809 } 1810 1811 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev, 1812 char *page) 1813 { 1814 struct se_node_acl *se_nacl; 1815 struct t10_pr_registration *pr_reg; 1816 char i_buf[PR_REG_ISID_ID_LEN] = { }; 1817 1818 pr_reg = dev->dev_pr_res_holder; 1819 if (!pr_reg) 1820 return sprintf(page, "No SPC-3 Reservation holder\n"); 1821 1822 se_nacl = pr_reg->pr_reg_nacl; 1823 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1824 1825 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", 1826 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1827 se_nacl->initiatorname, i_buf); 1828 } 1829 1830 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, 1831 char *page) 1832 { 1833 struct se_session *sess = dev->reservation_holder; 1834 struct se_node_acl *se_nacl; 1835 ssize_t len; 1836 1837 if (sess) { 1838 se_nacl = sess->se_node_acl; 1839 len = sprintf(page, 1840 "SPC-2 Reservation: %s Initiator: %s\n", 1841 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1842 se_nacl->initiatorname); 1843 } else { 1844 len = sprintf(page, "No SPC-2 Reservation holder\n"); 1845 } 1846 return len; 1847 } 1848 1849 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page) 1850 { 1851 struct se_device *dev = pr_to_dev(item); 1852 int ret; 1853 1854 if (!dev->dev_attrib.emulate_pr) 1855 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 1856 1857 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1858 return sprintf(page, "Passthrough\n"); 1859 1860 spin_lock(&dev->dev_reservation_lock); 1861 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1862 ret = target_core_dev_pr_show_spc2_res(dev, page); 1863 else 1864 ret = target_core_dev_pr_show_spc3_res(dev, page); 1865 spin_unlock(&dev->dev_reservation_lock); 1866 return ret; 1867 } 1868 1869 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item, 1870 char *page) 1871 { 1872 struct se_device *dev = pr_to_dev(item); 1873 ssize_t len = 0; 1874 1875 spin_lock(&dev->dev_reservation_lock); 1876 if (!dev->dev_pr_res_holder) { 1877 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1878 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { 1879 len = sprintf(page, "SPC-3 Reservation: All Target" 1880 " Ports registration\n"); 1881 } else { 1882 len = sprintf(page, "SPC-3 Reservation: Single" 1883 " Target Port registration\n"); 1884 } 1885 1886 spin_unlock(&dev->dev_reservation_lock); 1887 return len; 1888 } 1889 1890 static ssize_t target_pr_res_pr_generation_show(struct config_item *item, 1891 char *page) 1892 { 1893 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation); 1894 } 1895 1896 1897 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item, 1898 char *page) 1899 { 1900 struct se_device *dev = pr_to_dev(item); 1901 struct se_node_acl *se_nacl; 1902 struct se_portal_group *se_tpg; 1903 struct t10_pr_registration *pr_reg; 1904 const struct target_core_fabric_ops *tfo; 1905 ssize_t len = 0; 1906 1907 spin_lock(&dev->dev_reservation_lock); 1908 pr_reg = dev->dev_pr_res_holder; 1909 if (!pr_reg) { 1910 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1911 goto out_unlock; 1912 } 1913 1914 se_nacl = pr_reg->pr_reg_nacl; 1915 se_tpg = se_nacl->se_tpg; 1916 tfo = se_tpg->se_tpg_tfo; 1917 1918 len += sprintf(page+len, "SPC-3 Reservation: %s" 1919 " Target Node Endpoint: %s\n", tfo->fabric_name, 1920 tfo->tpg_get_wwn(se_tpg)); 1921 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1922 " Identifier Tag: %hu %s Portal Group Tag: %hu" 1923 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi, 1924 tfo->fabric_name, tfo->tpg_get_tag(se_tpg), 1925 tfo->fabric_name, pr_reg->pr_aptpl_target_lun); 1926 1927 out_unlock: 1928 spin_unlock(&dev->dev_reservation_lock); 1929 return len; 1930 } 1931 1932 1933 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item, 1934 char *page) 1935 { 1936 struct se_device *dev = pr_to_dev(item); 1937 const struct target_core_fabric_ops *tfo; 1938 struct t10_pr_registration *pr_reg; 1939 unsigned char buf[384]; 1940 char i_buf[PR_REG_ISID_ID_LEN]; 1941 ssize_t len = 0; 1942 int reg_count = 0; 1943 1944 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1945 1946 spin_lock(&dev->t10_pr.registration_lock); 1947 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1948 pr_reg_list) { 1949 1950 memset(buf, 0, 384); 1951 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1952 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1953 core_pr_dump_initiator_port(pr_reg, i_buf, 1954 PR_REG_ISID_ID_LEN); 1955 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1956 tfo->fabric_name, 1957 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, 1958 pr_reg->pr_res_generation); 1959 1960 if (len + strlen(buf) >= PAGE_SIZE) 1961 break; 1962 1963 len += sprintf(page+len, "%s", buf); 1964 reg_count++; 1965 } 1966 spin_unlock(&dev->t10_pr.registration_lock); 1967 1968 if (!reg_count) 1969 len += sprintf(page+len, "None\n"); 1970 1971 return len; 1972 } 1973 1974 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page) 1975 { 1976 struct se_device *dev = pr_to_dev(item); 1977 struct t10_pr_registration *pr_reg; 1978 ssize_t len = 0; 1979 1980 spin_lock(&dev->dev_reservation_lock); 1981 pr_reg = dev->dev_pr_res_holder; 1982 if (pr_reg) { 1983 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1984 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 1985 } else { 1986 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1987 } 1988 1989 spin_unlock(&dev->dev_reservation_lock); 1990 return len; 1991 } 1992 1993 static ssize_t target_pr_res_type_show(struct config_item *item, char *page) 1994 { 1995 struct se_device *dev = pr_to_dev(item); 1996 1997 if (!dev->dev_attrib.emulate_pr) 1998 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 1999 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 2000 return sprintf(page, "SPC_PASSTHROUGH\n"); 2001 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 2002 return sprintf(page, "SPC2_RESERVATIONS\n"); 2003 2004 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 2005 } 2006 2007 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item, 2008 char *page) 2009 { 2010 struct se_device *dev = pr_to_dev(item); 2011 2012 if (!dev->dev_attrib.emulate_pr || 2013 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 2014 return 0; 2015 2016 return sprintf(page, "APTPL Bit Status: %s\n", 2017 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 2018 } 2019 2020 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item, 2021 char *page) 2022 { 2023 struct se_device *dev = pr_to_dev(item); 2024 2025 if (!dev->dev_attrib.emulate_pr || 2026 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 2027 return 0; 2028 2029 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 2030 } 2031 2032 enum { 2033 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 2034 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 2035 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 2036 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 2037 }; 2038 2039 static match_table_t tokens = { 2040 {Opt_initiator_fabric, "initiator_fabric=%s"}, 2041 {Opt_initiator_node, "initiator_node=%s"}, 2042 {Opt_initiator_sid, "initiator_sid=%s"}, 2043 {Opt_sa_res_key, "sa_res_key=%s"}, 2044 {Opt_res_holder, "res_holder=%d"}, 2045 {Opt_res_type, "res_type=%d"}, 2046 {Opt_res_scope, "res_scope=%d"}, 2047 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 2048 {Opt_mapped_lun, "mapped_lun=%u"}, 2049 {Opt_target_fabric, "target_fabric=%s"}, 2050 {Opt_target_node, "target_node=%s"}, 2051 {Opt_tpgt, "tpgt=%d"}, 2052 {Opt_port_rtpi, "port_rtpi=%d"}, 2053 {Opt_target_lun, "target_lun=%u"}, 2054 {Opt_err, NULL} 2055 }; 2056 2057 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item, 2058 const char *page, size_t count) 2059 { 2060 struct se_device *dev = pr_to_dev(item); 2061 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 2062 unsigned char *t_fabric = NULL, *t_port = NULL; 2063 char *orig, *ptr, *opts; 2064 substring_t args[MAX_OPT_ARGS]; 2065 unsigned long long tmp_ll; 2066 u64 sa_res_key = 0; 2067 u64 mapped_lun = 0, target_lun = 0; 2068 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 2069 u16 tpgt = 0; 2070 u8 type = 0; 2071 2072 if (!dev->dev_attrib.emulate_pr || 2073 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 2074 return count; 2075 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 2076 return count; 2077 2078 if (dev->export_count) { 2079 pr_debug("Unable to process APTPL metadata while" 2080 " active fabric exports exist\n"); 2081 return -EINVAL; 2082 } 2083 2084 opts = kstrdup(page, GFP_KERNEL); 2085 if (!opts) 2086 return -ENOMEM; 2087 2088 orig = opts; 2089 while ((ptr = strsep(&opts, ",\n")) != NULL) { 2090 if (!*ptr) 2091 continue; 2092 2093 token = match_token(ptr, tokens, args); 2094 switch (token) { 2095 case Opt_initiator_fabric: 2096 i_fabric = match_strdup(args); 2097 if (!i_fabric) { 2098 ret = -ENOMEM; 2099 goto out; 2100 } 2101 break; 2102 case Opt_initiator_node: 2103 i_port = match_strdup(args); 2104 if (!i_port) { 2105 ret = -ENOMEM; 2106 goto out; 2107 } 2108 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 2109 pr_err("APTPL metadata initiator_node=" 2110 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 2111 PR_APTPL_MAX_IPORT_LEN); 2112 ret = -EINVAL; 2113 break; 2114 } 2115 break; 2116 case Opt_initiator_sid: 2117 isid = match_strdup(args); 2118 if (!isid) { 2119 ret = -ENOMEM; 2120 goto out; 2121 } 2122 if (strlen(isid) >= PR_REG_ISID_LEN) { 2123 pr_err("APTPL metadata initiator_isid" 2124 "= exceeds PR_REG_ISID_LEN: %d\n", 2125 PR_REG_ISID_LEN); 2126 ret = -EINVAL; 2127 break; 2128 } 2129 break; 2130 case Opt_sa_res_key: 2131 ret = match_u64(args, &tmp_ll); 2132 if (ret < 0) { 2133 pr_err("kstrtoull() failed for sa_res_key=\n"); 2134 goto out; 2135 } 2136 sa_res_key = (u64)tmp_ll; 2137 break; 2138 /* 2139 * PR APTPL Metadata for Reservation 2140 */ 2141 case Opt_res_holder: 2142 ret = match_int(args, &arg); 2143 if (ret) 2144 goto out; 2145 res_holder = arg; 2146 break; 2147 case Opt_res_type: 2148 ret = match_int(args, &arg); 2149 if (ret) 2150 goto out; 2151 type = (u8)arg; 2152 break; 2153 case Opt_res_scope: 2154 ret = match_int(args, &arg); 2155 if (ret) 2156 goto out; 2157 break; 2158 case Opt_res_all_tg_pt: 2159 ret = match_int(args, &arg); 2160 if (ret) 2161 goto out; 2162 all_tg_pt = (int)arg; 2163 break; 2164 case Opt_mapped_lun: 2165 ret = match_u64(args, &tmp_ll); 2166 if (ret) 2167 goto out; 2168 mapped_lun = (u64)tmp_ll; 2169 break; 2170 /* 2171 * PR APTPL Metadata for Target Port 2172 */ 2173 case Opt_target_fabric: 2174 t_fabric = match_strdup(args); 2175 if (!t_fabric) { 2176 ret = -ENOMEM; 2177 goto out; 2178 } 2179 break; 2180 case Opt_target_node: 2181 t_port = match_strdup(args); 2182 if (!t_port) { 2183 ret = -ENOMEM; 2184 goto out; 2185 } 2186 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 2187 pr_err("APTPL metadata target_node=" 2188 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 2189 PR_APTPL_MAX_TPORT_LEN); 2190 ret = -EINVAL; 2191 break; 2192 } 2193 break; 2194 case Opt_tpgt: 2195 ret = match_int(args, &arg); 2196 if (ret) 2197 goto out; 2198 tpgt = (u16)arg; 2199 break; 2200 case Opt_port_rtpi: 2201 ret = match_int(args, &arg); 2202 if (ret) 2203 goto out; 2204 break; 2205 case Opt_target_lun: 2206 ret = match_u64(args, &tmp_ll); 2207 if (ret) 2208 goto out; 2209 target_lun = (u64)tmp_ll; 2210 break; 2211 default: 2212 break; 2213 } 2214 } 2215 2216 if (!i_port || !t_port || !sa_res_key) { 2217 pr_err("Illegal parameters for APTPL registration\n"); 2218 ret = -EINVAL; 2219 goto out; 2220 } 2221 2222 if (res_holder && !(type)) { 2223 pr_err("Illegal PR type: 0x%02x for reservation" 2224 " holder\n", type); 2225 ret = -EINVAL; 2226 goto out; 2227 } 2228 2229 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, 2230 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 2231 res_holder, all_tg_pt, type); 2232 out: 2233 kfree(i_fabric); 2234 kfree(i_port); 2235 kfree(isid); 2236 kfree(t_fabric); 2237 kfree(t_port); 2238 kfree(orig); 2239 return (ret == 0) ? count : ret; 2240 } 2241 2242 2243 CONFIGFS_ATTR_RO(target_pr_, res_holder); 2244 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts); 2245 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation); 2246 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port); 2247 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts); 2248 CONFIGFS_ATTR_RO(target_pr_, res_pr_type); 2249 CONFIGFS_ATTR_RO(target_pr_, res_type); 2250 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active); 2251 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata); 2252 2253 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 2254 &target_pr_attr_res_holder, 2255 &target_pr_attr_res_pr_all_tgt_pts, 2256 &target_pr_attr_res_pr_generation, 2257 &target_pr_attr_res_pr_holder_tg_port, 2258 &target_pr_attr_res_pr_registered_i_pts, 2259 &target_pr_attr_res_pr_type, 2260 &target_pr_attr_res_type, 2261 &target_pr_attr_res_aptpl_active, 2262 &target_pr_attr_res_aptpl_metadata, 2263 NULL, 2264 }; 2265 2266 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs); 2267 2268 /* End functions for struct config_item_type tb_dev_pr_cit */ 2269 2270 /* Start functions for struct config_item_type tb_dev_cit */ 2271 2272 static inline struct se_device *to_device(struct config_item *item) 2273 { 2274 return container_of(to_config_group(item), struct se_device, dev_group); 2275 } 2276 2277 static ssize_t target_dev_info_show(struct config_item *item, char *page) 2278 { 2279 struct se_device *dev = to_device(item); 2280 int bl = 0; 2281 ssize_t read_bytes = 0; 2282 2283 transport_dump_dev_state(dev, page, &bl); 2284 read_bytes += bl; 2285 read_bytes += dev->transport->show_configfs_dev_params(dev, 2286 page+read_bytes); 2287 return read_bytes; 2288 } 2289 2290 static ssize_t target_dev_control_store(struct config_item *item, 2291 const char *page, size_t count) 2292 { 2293 struct se_device *dev = to_device(item); 2294 2295 return dev->transport->set_configfs_dev_params(dev, page, count); 2296 } 2297 2298 static ssize_t target_dev_alias_show(struct config_item *item, char *page) 2299 { 2300 struct se_device *dev = to_device(item); 2301 2302 if (!(dev->dev_flags & DF_USING_ALIAS)) 2303 return 0; 2304 2305 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); 2306 } 2307 2308 static ssize_t target_dev_alias_store(struct config_item *item, 2309 const char *page, size_t count) 2310 { 2311 struct se_device *dev = to_device(item); 2312 struct se_hba *hba = dev->se_hba; 2313 ssize_t read_bytes; 2314 2315 if (count > (SE_DEV_ALIAS_LEN-1)) { 2316 pr_err("alias count: %d exceeds" 2317 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 2318 SE_DEV_ALIAS_LEN-1); 2319 return -EINVAL; 2320 } 2321 2322 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); 2323 if (!read_bytes) 2324 return -EINVAL; 2325 if (dev->dev_alias[read_bytes - 1] == '\n') 2326 dev->dev_alias[read_bytes - 1] = '\0'; 2327 2328 dev->dev_flags |= DF_USING_ALIAS; 2329 2330 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 2331 config_item_name(&hba->hba_group.cg_item), 2332 config_item_name(&dev->dev_group.cg_item), 2333 dev->dev_alias); 2334 2335 return read_bytes; 2336 } 2337 2338 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page) 2339 { 2340 struct se_device *dev = to_device(item); 2341 2342 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) 2343 return 0; 2344 2345 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); 2346 } 2347 2348 static ssize_t target_dev_udev_path_store(struct config_item *item, 2349 const char *page, size_t count) 2350 { 2351 struct se_device *dev = to_device(item); 2352 struct se_hba *hba = dev->se_hba; 2353 ssize_t read_bytes; 2354 2355 if (count > (SE_UDEV_PATH_LEN-1)) { 2356 pr_err("udev_path count: %d exceeds" 2357 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 2358 SE_UDEV_PATH_LEN-1); 2359 return -EINVAL; 2360 } 2361 2362 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, 2363 "%s", page); 2364 if (!read_bytes) 2365 return -EINVAL; 2366 if (dev->udev_path[read_bytes - 1] == '\n') 2367 dev->udev_path[read_bytes - 1] = '\0'; 2368 2369 dev->dev_flags |= DF_USING_UDEV_PATH; 2370 2371 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 2372 config_item_name(&hba->hba_group.cg_item), 2373 config_item_name(&dev->dev_group.cg_item), 2374 dev->udev_path); 2375 2376 return read_bytes; 2377 } 2378 2379 static ssize_t target_dev_enable_show(struct config_item *item, char *page) 2380 { 2381 struct se_device *dev = to_device(item); 2382 2383 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev)); 2384 } 2385 2386 static ssize_t target_dev_enable_store(struct config_item *item, 2387 const char *page, size_t count) 2388 { 2389 struct se_device *dev = to_device(item); 2390 char *ptr; 2391 int ret; 2392 2393 ptr = strstr(page, "1"); 2394 if (!ptr) { 2395 pr_err("For dev_enable ops, only valid value" 2396 " is \"1\"\n"); 2397 return -EINVAL; 2398 } 2399 2400 ret = target_configure_device(dev); 2401 if (ret) 2402 return ret; 2403 return count; 2404 } 2405 2406 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page) 2407 { 2408 struct se_device *dev = to_device(item); 2409 struct config_item *lu_ci; 2410 struct t10_alua_lu_gp *lu_gp; 2411 struct t10_alua_lu_gp_member *lu_gp_mem; 2412 ssize_t len = 0; 2413 2414 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2415 if (!lu_gp_mem) 2416 return 0; 2417 2418 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2419 lu_gp = lu_gp_mem->lu_gp; 2420 if (lu_gp) { 2421 lu_ci = &lu_gp->lu_gp_group.cg_item; 2422 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 2423 config_item_name(lu_ci), lu_gp->lu_gp_id); 2424 } 2425 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2426 2427 return len; 2428 } 2429 2430 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item, 2431 const char *page, size_t count) 2432 { 2433 struct se_device *dev = to_device(item); 2434 struct se_hba *hba = dev->se_hba; 2435 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 2436 struct t10_alua_lu_gp_member *lu_gp_mem; 2437 unsigned char buf[LU_GROUP_NAME_BUF] = { }; 2438 int move = 0; 2439 2440 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2441 if (!lu_gp_mem) 2442 return count; 2443 2444 if (count > LU_GROUP_NAME_BUF) { 2445 pr_err("ALUA LU Group Alias too large!\n"); 2446 return -EINVAL; 2447 } 2448 memcpy(buf, page, count); 2449 /* 2450 * Any ALUA logical unit alias besides "NULL" means we will be 2451 * making a new group association. 2452 */ 2453 if (strcmp(strstrip(buf), "NULL")) { 2454 /* 2455 * core_alua_get_lu_gp_by_name() will increment reference to 2456 * struct t10_alua_lu_gp. This reference is released with 2457 * core_alua_get_lu_gp_by_name below(). 2458 */ 2459 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 2460 if (!lu_gp_new) 2461 return -ENODEV; 2462 } 2463 2464 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2465 lu_gp = lu_gp_mem->lu_gp; 2466 if (lu_gp) { 2467 /* 2468 * Clearing an existing lu_gp association, and replacing 2469 * with NULL 2470 */ 2471 if (!lu_gp_new) { 2472 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 2473 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 2474 " %hu\n", 2475 config_item_name(&hba->hba_group.cg_item), 2476 config_item_name(&dev->dev_group.cg_item), 2477 config_item_name(&lu_gp->lu_gp_group.cg_item), 2478 lu_gp->lu_gp_id); 2479 2480 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2481 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2482 2483 return count; 2484 } 2485 /* 2486 * Removing existing association of lu_gp_mem with lu_gp 2487 */ 2488 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2489 move = 1; 2490 } 2491 /* 2492 * Associate lu_gp_mem with lu_gp_new. 2493 */ 2494 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 2495 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2496 2497 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 2498 " core/alua/lu_gps/%s, ID: %hu\n", 2499 (move) ? "Moving" : "Adding", 2500 config_item_name(&hba->hba_group.cg_item), 2501 config_item_name(&dev->dev_group.cg_item), 2502 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 2503 lu_gp_new->lu_gp_id); 2504 2505 core_alua_put_lu_gp_from_name(lu_gp_new); 2506 return count; 2507 } 2508 2509 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page) 2510 { 2511 struct se_device *dev = to_device(item); 2512 struct t10_alua_lba_map *map; 2513 struct t10_alua_lba_map_member *mem; 2514 char *b = page; 2515 int bl = 0; 2516 char state; 2517 2518 spin_lock(&dev->t10_alua.lba_map_lock); 2519 if (!list_empty(&dev->t10_alua.lba_map_list)) 2520 bl += sprintf(b + bl, "%u %u\n", 2521 dev->t10_alua.lba_map_segment_size, 2522 dev->t10_alua.lba_map_segment_multiplier); 2523 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) { 2524 bl += sprintf(b + bl, "%llu %llu", 2525 map->lba_map_first_lba, map->lba_map_last_lba); 2526 list_for_each_entry(mem, &map->lba_map_mem_list, 2527 lba_map_mem_list) { 2528 switch (mem->lba_map_mem_alua_state) { 2529 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: 2530 state = 'O'; 2531 break; 2532 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: 2533 state = 'A'; 2534 break; 2535 case ALUA_ACCESS_STATE_STANDBY: 2536 state = 'S'; 2537 break; 2538 case ALUA_ACCESS_STATE_UNAVAILABLE: 2539 state = 'U'; 2540 break; 2541 default: 2542 state = '.'; 2543 break; 2544 } 2545 bl += sprintf(b + bl, " %d:%c", 2546 mem->lba_map_mem_alua_pg_id, state); 2547 } 2548 bl += sprintf(b + bl, "\n"); 2549 } 2550 spin_unlock(&dev->t10_alua.lba_map_lock); 2551 return bl; 2552 } 2553 2554 static ssize_t target_dev_lba_map_store(struct config_item *item, 2555 const char *page, size_t count) 2556 { 2557 struct se_device *dev = to_device(item); 2558 struct t10_alua_lba_map *lba_map = NULL; 2559 struct list_head lba_list; 2560 char *map_entries, *orig, *ptr; 2561 char state; 2562 int pg_num = -1, pg; 2563 int ret = 0, num = 0, pg_id, alua_state; 2564 unsigned long start_lba = -1, end_lba = -1; 2565 unsigned long segment_size = -1, segment_mult = -1; 2566 2567 orig = map_entries = kstrdup(page, GFP_KERNEL); 2568 if (!map_entries) 2569 return -ENOMEM; 2570 2571 INIT_LIST_HEAD(&lba_list); 2572 while ((ptr = strsep(&map_entries, "\n")) != NULL) { 2573 if (!*ptr) 2574 continue; 2575 2576 if (num == 0) { 2577 if (sscanf(ptr, "%lu %lu\n", 2578 &segment_size, &segment_mult) != 2) { 2579 pr_err("Invalid line %d\n", num); 2580 ret = -EINVAL; 2581 break; 2582 } 2583 num++; 2584 continue; 2585 } 2586 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) { 2587 pr_err("Invalid line %d\n", num); 2588 ret = -EINVAL; 2589 break; 2590 } 2591 ptr = strchr(ptr, ' '); 2592 if (!ptr) { 2593 pr_err("Invalid line %d, missing end lba\n", num); 2594 ret = -EINVAL; 2595 break; 2596 } 2597 ptr++; 2598 ptr = strchr(ptr, ' '); 2599 if (!ptr) { 2600 pr_err("Invalid line %d, missing state definitions\n", 2601 num); 2602 ret = -EINVAL; 2603 break; 2604 } 2605 ptr++; 2606 lba_map = core_alua_allocate_lba_map(&lba_list, 2607 start_lba, end_lba); 2608 if (IS_ERR(lba_map)) { 2609 ret = PTR_ERR(lba_map); 2610 break; 2611 } 2612 pg = 0; 2613 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) { 2614 switch (state) { 2615 case 'O': 2616 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED; 2617 break; 2618 case 'A': 2619 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED; 2620 break; 2621 case 'S': 2622 alua_state = ALUA_ACCESS_STATE_STANDBY; 2623 break; 2624 case 'U': 2625 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE; 2626 break; 2627 default: 2628 pr_err("Invalid ALUA state '%c'\n", state); 2629 ret = -EINVAL; 2630 goto out; 2631 } 2632 2633 ret = core_alua_allocate_lba_map_mem(lba_map, 2634 pg_id, alua_state); 2635 if (ret) { 2636 pr_err("Invalid target descriptor %d:%c " 2637 "at line %d\n", 2638 pg_id, state, num); 2639 break; 2640 } 2641 pg++; 2642 ptr = strchr(ptr, ' '); 2643 if (ptr) 2644 ptr++; 2645 else 2646 break; 2647 } 2648 if (pg_num == -1) 2649 pg_num = pg; 2650 else if (pg != pg_num) { 2651 pr_err("Only %d from %d port groups definitions " 2652 "at line %d\n", pg, pg_num, num); 2653 ret = -EINVAL; 2654 break; 2655 } 2656 num++; 2657 } 2658 out: 2659 if (ret) { 2660 core_alua_free_lba_map(&lba_list); 2661 count = ret; 2662 } else 2663 core_alua_set_lba_map(dev, &lba_list, 2664 segment_size, segment_mult); 2665 kfree(orig); 2666 return count; 2667 } 2668 2669 CONFIGFS_ATTR_RO(target_dev_, info); 2670 CONFIGFS_ATTR_WO(target_dev_, control); 2671 CONFIGFS_ATTR(target_dev_, alias); 2672 CONFIGFS_ATTR(target_dev_, udev_path); 2673 CONFIGFS_ATTR(target_dev_, enable); 2674 CONFIGFS_ATTR(target_dev_, alua_lu_gp); 2675 CONFIGFS_ATTR(target_dev_, lba_map); 2676 2677 static struct configfs_attribute *target_core_dev_attrs[] = { 2678 &target_dev_attr_info, 2679 &target_dev_attr_control, 2680 &target_dev_attr_alias, 2681 &target_dev_attr_udev_path, 2682 &target_dev_attr_enable, 2683 &target_dev_attr_alua_lu_gp, 2684 &target_dev_attr_lba_map, 2685 NULL, 2686 }; 2687 2688 static void target_core_dev_release(struct config_item *item) 2689 { 2690 struct config_group *dev_cg = to_config_group(item); 2691 struct se_device *dev = 2692 container_of(dev_cg, struct se_device, dev_group); 2693 2694 target_free_device(dev); 2695 } 2696 2697 /* 2698 * Used in target_core_fabric_configfs.c to verify valid se_device symlink 2699 * within target_fabric_port_link() 2700 */ 2701 struct configfs_item_operations target_core_dev_item_ops = { 2702 .release = target_core_dev_release, 2703 }; 2704 2705 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs); 2706 2707 /* End functions for struct config_item_type tb_dev_cit */ 2708 2709 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 2710 2711 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item) 2712 { 2713 return container_of(to_config_group(item), struct t10_alua_lu_gp, 2714 lu_gp_group); 2715 } 2716 2717 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page) 2718 { 2719 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2720 2721 if (!lu_gp->lu_gp_valid_id) 2722 return 0; 2723 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2724 } 2725 2726 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item, 2727 const char *page, size_t count) 2728 { 2729 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2730 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2731 unsigned long lu_gp_id; 2732 int ret; 2733 2734 ret = kstrtoul(page, 0, &lu_gp_id); 2735 if (ret < 0) { 2736 pr_err("kstrtoul() returned %d for" 2737 " lu_gp_id\n", ret); 2738 return ret; 2739 } 2740 if (lu_gp_id > 0x0000ffff) { 2741 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 2742 " 0x0000ffff\n", lu_gp_id); 2743 return -EINVAL; 2744 } 2745 2746 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2747 if (ret < 0) 2748 return -EINVAL; 2749 2750 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 2751 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2752 config_item_name(&alua_lu_gp_cg->cg_item), 2753 lu_gp->lu_gp_id); 2754 2755 return count; 2756 } 2757 2758 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page) 2759 { 2760 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2761 struct se_device *dev; 2762 struct se_hba *hba; 2763 struct t10_alua_lu_gp_member *lu_gp_mem; 2764 ssize_t len = 0, cur_len; 2765 unsigned char buf[LU_GROUP_NAME_BUF] = { }; 2766 2767 spin_lock(&lu_gp->lu_gp_lock); 2768 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2769 dev = lu_gp_mem->lu_gp_mem_dev; 2770 hba = dev->se_hba; 2771 2772 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 2773 config_item_name(&hba->hba_group.cg_item), 2774 config_item_name(&dev->dev_group.cg_item)); 2775 cur_len++; /* Extra byte for NULL terminator */ 2776 2777 if ((cur_len + len) > PAGE_SIZE) { 2778 pr_warn("Ran out of lu_gp_show_attr" 2779 "_members buffer\n"); 2780 break; 2781 } 2782 memcpy(page+len, buf, cur_len); 2783 len += cur_len; 2784 } 2785 spin_unlock(&lu_gp->lu_gp_lock); 2786 2787 return len; 2788 } 2789 2790 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id); 2791 CONFIGFS_ATTR_RO(target_lu_gp_, members); 2792 2793 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2794 &target_lu_gp_attr_lu_gp_id, 2795 &target_lu_gp_attr_members, 2796 NULL, 2797 }; 2798 2799 static void target_core_alua_lu_gp_release(struct config_item *item) 2800 { 2801 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2802 struct t10_alua_lu_gp, lu_gp_group); 2803 2804 core_alua_free_lu_gp(lu_gp); 2805 } 2806 2807 static struct configfs_item_operations target_core_alua_lu_gp_ops = { 2808 .release = target_core_alua_lu_gp_release, 2809 }; 2810 2811 static const struct config_item_type target_core_alua_lu_gp_cit = { 2812 .ct_item_ops = &target_core_alua_lu_gp_ops, 2813 .ct_attrs = target_core_alua_lu_gp_attrs, 2814 .ct_owner = THIS_MODULE, 2815 }; 2816 2817 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2818 2819 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2820 2821 static struct config_group *target_core_alua_create_lu_gp( 2822 struct config_group *group, 2823 const char *name) 2824 { 2825 struct t10_alua_lu_gp *lu_gp; 2826 struct config_group *alua_lu_gp_cg = NULL; 2827 struct config_item *alua_lu_gp_ci = NULL; 2828 2829 lu_gp = core_alua_allocate_lu_gp(name, 0); 2830 if (IS_ERR(lu_gp)) 2831 return NULL; 2832 2833 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2834 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2835 2836 config_group_init_type_name(alua_lu_gp_cg, name, 2837 &target_core_alua_lu_gp_cit); 2838 2839 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2840 " Group: core/alua/lu_gps/%s\n", 2841 config_item_name(alua_lu_gp_ci)); 2842 2843 return alua_lu_gp_cg; 2844 2845 } 2846 2847 static void target_core_alua_drop_lu_gp( 2848 struct config_group *group, 2849 struct config_item *item) 2850 { 2851 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2852 struct t10_alua_lu_gp, lu_gp_group); 2853 2854 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2855 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2856 config_item_name(item), lu_gp->lu_gp_id); 2857 /* 2858 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 2859 * -> target_core_alua_lu_gp_release() 2860 */ 2861 config_item_put(item); 2862 } 2863 2864 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2865 .make_group = &target_core_alua_create_lu_gp, 2866 .drop_item = &target_core_alua_drop_lu_gp, 2867 }; 2868 2869 static const struct config_item_type target_core_alua_lu_gps_cit = { 2870 .ct_item_ops = NULL, 2871 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2872 .ct_owner = THIS_MODULE, 2873 }; 2874 2875 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2876 2877 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2878 2879 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item) 2880 { 2881 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp, 2882 tg_pt_gp_group); 2883 } 2884 2885 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item, 2886 char *page) 2887 { 2888 return sprintf(page, "%d\n", 2889 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state); 2890 } 2891 2892 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item, 2893 const char *page, size_t count) 2894 { 2895 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2896 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; 2897 unsigned long tmp; 2898 int new_state, ret; 2899 2900 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2901 pr_err("Unable to do implicit ALUA on invalid tg_pt_gp ID\n"); 2902 return -EINVAL; 2903 } 2904 if (!target_dev_configured(dev)) { 2905 pr_err("Unable to set alua_access_state while device is" 2906 " not configured\n"); 2907 return -ENODEV; 2908 } 2909 2910 ret = kstrtoul(page, 0, &tmp); 2911 if (ret < 0) { 2912 pr_err("Unable to extract new ALUA access state from" 2913 " %s\n", page); 2914 return ret; 2915 } 2916 new_state = (int)tmp; 2917 2918 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) { 2919 pr_err("Unable to process implicit configfs ALUA" 2920 " transition while TPGS_IMPLICIT_ALUA is disabled\n"); 2921 return -EINVAL; 2922 } 2923 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA && 2924 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) { 2925 /* LBA DEPENDENT is only allowed with implicit ALUA */ 2926 pr_err("Unable to process implicit configfs ALUA transition" 2927 " while explicit ALUA management is enabled\n"); 2928 return -EINVAL; 2929 } 2930 2931 ret = core_alua_do_port_transition(tg_pt_gp, dev, 2932 NULL, NULL, new_state, 0); 2933 return (!ret) ? count : -EINVAL; 2934 } 2935 2936 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item, 2937 char *page) 2938 { 2939 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2940 return sprintf(page, "%s\n", 2941 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2942 } 2943 2944 static ssize_t target_tg_pt_gp_alua_access_status_store( 2945 struct config_item *item, const char *page, size_t count) 2946 { 2947 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2948 unsigned long tmp; 2949 int new_status, ret; 2950 2951 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2952 pr_err("Unable to set ALUA access status on invalid tg_pt_gp ID\n"); 2953 return -EINVAL; 2954 } 2955 2956 ret = kstrtoul(page, 0, &tmp); 2957 if (ret < 0) { 2958 pr_err("Unable to extract new ALUA access status" 2959 " from %s\n", page); 2960 return ret; 2961 } 2962 new_status = (int)tmp; 2963 2964 if ((new_status != ALUA_STATUS_NONE) && 2965 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && 2966 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { 2967 pr_err("Illegal ALUA access status: 0x%02x\n", 2968 new_status); 2969 return -EINVAL; 2970 } 2971 2972 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2973 return count; 2974 } 2975 2976 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item, 2977 char *page) 2978 { 2979 return core_alua_show_access_type(to_tg_pt_gp(item), page); 2980 } 2981 2982 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item, 2983 const char *page, size_t count) 2984 { 2985 return core_alua_store_access_type(to_tg_pt_gp(item), page, count); 2986 } 2987 2988 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \ 2989 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \ 2990 struct config_item *item, char *p) \ 2991 { \ 2992 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 2993 return sprintf(p, "%d\n", \ 2994 !!(t->tg_pt_gp_alua_supported_states & _bit)); \ 2995 } \ 2996 \ 2997 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \ 2998 struct config_item *item, const char *p, size_t c) \ 2999 { \ 3000 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 3001 unsigned long tmp; \ 3002 int ret; \ 3003 \ 3004 if (!t->tg_pt_gp_valid_id) { \ 3005 pr_err("Unable to set " #_name " ALUA state on invalid tg_pt_gp ID\n"); \ 3006 return -EINVAL; \ 3007 } \ 3008 \ 3009 ret = kstrtoul(p, 0, &tmp); \ 3010 if (ret < 0) { \ 3011 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \ 3012 return -EINVAL; \ 3013 } \ 3014 if (tmp > 1) { \ 3015 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \ 3016 return -EINVAL; \ 3017 } \ 3018 if (tmp) \ 3019 t->tg_pt_gp_alua_supported_states |= _bit; \ 3020 else \ 3021 t->tg_pt_gp_alua_supported_states &= ~_bit; \ 3022 \ 3023 return c; \ 3024 } 3025 3026 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP); 3027 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP); 3028 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP); 3029 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP); 3030 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP); 3031 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP); 3032 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP); 3033 3034 static ssize_t target_tg_pt_gp_alua_write_metadata_show( 3035 struct config_item *item, char *page) 3036 { 3037 return sprintf(page, "%d\n", 3038 to_tg_pt_gp(item)->tg_pt_gp_write_metadata); 3039 } 3040 3041 static ssize_t target_tg_pt_gp_alua_write_metadata_store( 3042 struct config_item *item, const char *page, size_t count) 3043 { 3044 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3045 unsigned long tmp; 3046 int ret; 3047 3048 ret = kstrtoul(page, 0, &tmp); 3049 if (ret < 0) { 3050 pr_err("Unable to extract alua_write_metadata\n"); 3051 return ret; 3052 } 3053 3054 if ((tmp != 0) && (tmp != 1)) { 3055 pr_err("Illegal value for alua_write_metadata:" 3056 " %lu\n", tmp); 3057 return -EINVAL; 3058 } 3059 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 3060 3061 return count; 3062 } 3063 3064 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item, 3065 char *page) 3066 { 3067 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page); 3068 } 3069 3070 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item, 3071 const char *page, size_t count) 3072 { 3073 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page, 3074 count); 3075 } 3076 3077 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item, 3078 char *page) 3079 { 3080 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page); 3081 } 3082 3083 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item, 3084 const char *page, size_t count) 3085 { 3086 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page, 3087 count); 3088 } 3089 3090 static ssize_t target_tg_pt_gp_implicit_trans_secs_show( 3091 struct config_item *item, char *page) 3092 { 3093 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page); 3094 } 3095 3096 static ssize_t target_tg_pt_gp_implicit_trans_secs_store( 3097 struct config_item *item, const char *page, size_t count) 3098 { 3099 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page, 3100 count); 3101 } 3102 3103 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item, 3104 char *page) 3105 { 3106 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page); 3107 } 3108 3109 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item, 3110 const char *page, size_t count) 3111 { 3112 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count); 3113 } 3114 3115 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item, 3116 char *page) 3117 { 3118 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3119 3120 if (!tg_pt_gp->tg_pt_gp_valid_id) 3121 return 0; 3122 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 3123 } 3124 3125 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item, 3126 const char *page, size_t count) 3127 { 3128 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3129 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 3130 unsigned long tg_pt_gp_id; 3131 int ret; 3132 3133 ret = kstrtoul(page, 0, &tg_pt_gp_id); 3134 if (ret < 0) { 3135 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n", 3136 page); 3137 return ret; 3138 } 3139 if (tg_pt_gp_id > 0x0000ffff) { 3140 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n", 3141 tg_pt_gp_id); 3142 return -EINVAL; 3143 } 3144 3145 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 3146 if (ret < 0) 3147 return -EINVAL; 3148 3149 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 3150 "core/alua/tg_pt_gps/%s to ID: %hu\n", 3151 config_item_name(&alua_tg_pt_gp_cg->cg_item), 3152 tg_pt_gp->tg_pt_gp_id); 3153 3154 return count; 3155 } 3156 3157 static ssize_t target_tg_pt_gp_members_show(struct config_item *item, 3158 char *page) 3159 { 3160 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3161 struct se_lun *lun; 3162 ssize_t len = 0, cur_len; 3163 unsigned char buf[TG_PT_GROUP_NAME_BUF] = { }; 3164 3165 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 3166 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, 3167 lun_tg_pt_gp_link) { 3168 struct se_portal_group *tpg = lun->lun_tpg; 3169 3170 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 3171 "/%s\n", tpg->se_tpg_tfo->fabric_name, 3172 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 3173 tpg->se_tpg_tfo->tpg_get_tag(tpg), 3174 config_item_name(&lun->lun_group.cg_item)); 3175 cur_len++; /* Extra byte for NULL terminator */ 3176 3177 if ((cur_len + len) > PAGE_SIZE) { 3178 pr_warn("Ran out of lu_gp_show_attr" 3179 "_members buffer\n"); 3180 break; 3181 } 3182 memcpy(page+len, buf, cur_len); 3183 len += cur_len; 3184 } 3185 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 3186 3187 return len; 3188 } 3189 3190 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state); 3191 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status); 3192 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type); 3193 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning); 3194 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline); 3195 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent); 3196 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable); 3197 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby); 3198 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized); 3199 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized); 3200 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata); 3201 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs); 3202 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs); 3203 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs); 3204 CONFIGFS_ATTR(target_tg_pt_gp_, preferred); 3205 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id); 3206 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members); 3207 3208 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 3209 &target_tg_pt_gp_attr_alua_access_state, 3210 &target_tg_pt_gp_attr_alua_access_status, 3211 &target_tg_pt_gp_attr_alua_access_type, 3212 &target_tg_pt_gp_attr_alua_support_transitioning, 3213 &target_tg_pt_gp_attr_alua_support_offline, 3214 &target_tg_pt_gp_attr_alua_support_lba_dependent, 3215 &target_tg_pt_gp_attr_alua_support_unavailable, 3216 &target_tg_pt_gp_attr_alua_support_standby, 3217 &target_tg_pt_gp_attr_alua_support_active_nonoptimized, 3218 &target_tg_pt_gp_attr_alua_support_active_optimized, 3219 &target_tg_pt_gp_attr_alua_write_metadata, 3220 &target_tg_pt_gp_attr_nonop_delay_msecs, 3221 &target_tg_pt_gp_attr_trans_delay_msecs, 3222 &target_tg_pt_gp_attr_implicit_trans_secs, 3223 &target_tg_pt_gp_attr_preferred, 3224 &target_tg_pt_gp_attr_tg_pt_gp_id, 3225 &target_tg_pt_gp_attr_members, 3226 NULL, 3227 }; 3228 3229 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 3230 { 3231 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3232 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3233 3234 core_alua_free_tg_pt_gp(tg_pt_gp); 3235 } 3236 3237 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 3238 .release = target_core_alua_tg_pt_gp_release, 3239 }; 3240 3241 static const struct config_item_type target_core_alua_tg_pt_gp_cit = { 3242 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 3243 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 3244 .ct_owner = THIS_MODULE, 3245 }; 3246 3247 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 3248 3249 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3250 3251 static struct config_group *target_core_alua_create_tg_pt_gp( 3252 struct config_group *group, 3253 const char *name) 3254 { 3255 struct t10_alua *alua = container_of(group, struct t10_alua, 3256 alua_tg_pt_gps_group); 3257 struct t10_alua_tg_pt_gp *tg_pt_gp; 3258 struct config_group *alua_tg_pt_gp_cg = NULL; 3259 struct config_item *alua_tg_pt_gp_ci = NULL; 3260 3261 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0); 3262 if (!tg_pt_gp) 3263 return NULL; 3264 3265 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 3266 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 3267 3268 config_group_init_type_name(alua_tg_pt_gp_cg, name, 3269 &target_core_alua_tg_pt_gp_cit); 3270 3271 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 3272 " Group: alua/tg_pt_gps/%s\n", 3273 config_item_name(alua_tg_pt_gp_ci)); 3274 3275 return alua_tg_pt_gp_cg; 3276 } 3277 3278 static void target_core_alua_drop_tg_pt_gp( 3279 struct config_group *group, 3280 struct config_item *item) 3281 { 3282 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3283 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3284 3285 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 3286 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 3287 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 3288 /* 3289 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 3290 * -> target_core_alua_tg_pt_gp_release(). 3291 */ 3292 config_item_put(item); 3293 } 3294 3295 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 3296 .make_group = &target_core_alua_create_tg_pt_gp, 3297 .drop_item = &target_core_alua_drop_tg_pt_gp, 3298 }; 3299 3300 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL); 3301 3302 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3303 3304 /* Start functions for struct config_item_type target_core_alua_cit */ 3305 3306 /* 3307 * target_core_alua_cit is a ConfigFS group that lives under 3308 * /sys/kernel/config/target/core/alua. There are default groups 3309 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 3310 * target_core_alua_cit in target_core_init_configfs() below. 3311 */ 3312 static const struct config_item_type target_core_alua_cit = { 3313 .ct_item_ops = NULL, 3314 .ct_attrs = NULL, 3315 .ct_owner = THIS_MODULE, 3316 }; 3317 3318 /* End functions for struct config_item_type target_core_alua_cit */ 3319 3320 /* Start functions for struct config_item_type tb_dev_stat_cit */ 3321 3322 static struct config_group *target_core_stat_mkdir( 3323 struct config_group *group, 3324 const char *name) 3325 { 3326 return ERR_PTR(-ENOSYS); 3327 } 3328 3329 static void target_core_stat_rmdir( 3330 struct config_group *group, 3331 struct config_item *item) 3332 { 3333 return; 3334 } 3335 3336 static struct configfs_group_operations target_core_stat_group_ops = { 3337 .make_group = &target_core_stat_mkdir, 3338 .drop_item = &target_core_stat_rmdir, 3339 }; 3340 3341 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL); 3342 3343 /* End functions for struct config_item_type tb_dev_stat_cit */ 3344 3345 /* Start functions for struct config_item_type target_core_hba_cit */ 3346 3347 static struct config_group *target_core_make_subdev( 3348 struct config_group *group, 3349 const char *name) 3350 { 3351 struct t10_alua_tg_pt_gp *tg_pt_gp; 3352 struct config_item *hba_ci = &group->cg_item; 3353 struct se_hba *hba = item_to_hba(hba_ci); 3354 struct target_backend *tb = hba->backend; 3355 struct se_device *dev; 3356 int errno = -ENOMEM, ret; 3357 3358 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 3359 if (ret) 3360 return ERR_PTR(ret); 3361 3362 dev = target_alloc_device(hba, name); 3363 if (!dev) 3364 goto out_unlock; 3365 3366 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit); 3367 3368 config_group_init_type_name(&dev->dev_action_group, "action", 3369 &tb->tb_dev_action_cit); 3370 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group); 3371 3372 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib", 3373 &tb->tb_dev_attrib_cit); 3374 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group); 3375 3376 config_group_init_type_name(&dev->dev_pr_group, "pr", 3377 &tb->tb_dev_pr_cit); 3378 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group); 3379 3380 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn", 3381 &tb->tb_dev_wwn_cit); 3382 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group, 3383 &dev->dev_group); 3384 3385 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group, 3386 "alua", &tb->tb_dev_alua_tg_pt_gps_cit); 3387 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group, 3388 &dev->dev_group); 3389 3390 config_group_init_type_name(&dev->dev_stat_grps.stat_group, 3391 "statistics", &tb->tb_dev_stat_cit); 3392 configfs_add_default_group(&dev->dev_stat_grps.stat_group, 3393 &dev->dev_group); 3394 3395 /* 3396 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 3397 */ 3398 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1); 3399 if (!tg_pt_gp) 3400 goto out_free_device; 3401 dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 3402 3403 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 3404 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 3405 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group, 3406 &dev->t10_alua.alua_tg_pt_gps_group); 3407 3408 /* 3409 * Add core/$HBA/$DEV/statistics/ default groups 3410 */ 3411 target_stat_setup_dev_default_groups(dev); 3412 3413 mutex_lock(&target_devices_lock); 3414 target_devices++; 3415 mutex_unlock(&target_devices_lock); 3416 3417 mutex_unlock(&hba->hba_access_mutex); 3418 return &dev->dev_group; 3419 3420 out_free_device: 3421 target_free_device(dev); 3422 out_unlock: 3423 mutex_unlock(&hba->hba_access_mutex); 3424 return ERR_PTR(errno); 3425 } 3426 3427 static void target_core_drop_subdev( 3428 struct config_group *group, 3429 struct config_item *item) 3430 { 3431 struct config_group *dev_cg = to_config_group(item); 3432 struct se_device *dev = 3433 container_of(dev_cg, struct se_device, dev_group); 3434 struct se_hba *hba; 3435 3436 hba = item_to_hba(&dev->se_hba->hba_group.cg_item); 3437 3438 mutex_lock(&hba->hba_access_mutex); 3439 3440 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group); 3441 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group); 3442 3443 /* 3444 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 3445 * directly from target_core_alua_tg_pt_gp_release(). 3446 */ 3447 dev->t10_alua.default_tg_pt_gp = NULL; 3448 3449 configfs_remove_default_groups(dev_cg); 3450 3451 /* 3452 * se_dev is released from target_core_dev_item_ops->release() 3453 */ 3454 config_item_put(item); 3455 3456 mutex_lock(&target_devices_lock); 3457 target_devices--; 3458 mutex_unlock(&target_devices_lock); 3459 3460 mutex_unlock(&hba->hba_access_mutex); 3461 } 3462 3463 static struct configfs_group_operations target_core_hba_group_ops = { 3464 .make_group = target_core_make_subdev, 3465 .drop_item = target_core_drop_subdev, 3466 }; 3467 3468 3469 static inline struct se_hba *to_hba(struct config_item *item) 3470 { 3471 return container_of(to_config_group(item), struct se_hba, hba_group); 3472 } 3473 3474 static ssize_t target_hba_info_show(struct config_item *item, char *page) 3475 { 3476 struct se_hba *hba = to_hba(item); 3477 3478 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 3479 hba->hba_id, hba->backend->ops->name, 3480 TARGET_CORE_VERSION); 3481 } 3482 3483 static ssize_t target_hba_mode_show(struct config_item *item, char *page) 3484 { 3485 struct se_hba *hba = to_hba(item); 3486 int hba_mode = 0; 3487 3488 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 3489 hba_mode = 1; 3490 3491 return sprintf(page, "%d\n", hba_mode); 3492 } 3493 3494 static ssize_t target_hba_mode_store(struct config_item *item, 3495 const char *page, size_t count) 3496 { 3497 struct se_hba *hba = to_hba(item); 3498 unsigned long mode_flag; 3499 int ret; 3500 3501 if (hba->backend->ops->pmode_enable_hba == NULL) 3502 return -EINVAL; 3503 3504 ret = kstrtoul(page, 0, &mode_flag); 3505 if (ret < 0) { 3506 pr_err("Unable to extract hba mode flag: %d\n", ret); 3507 return ret; 3508 } 3509 3510 if (hba->dev_count) { 3511 pr_err("Unable to set hba_mode with active devices\n"); 3512 return -EINVAL; 3513 } 3514 3515 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag); 3516 if (ret < 0) 3517 return -EINVAL; 3518 if (ret > 0) 3519 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 3520 else if (ret == 0) 3521 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 3522 3523 return count; 3524 } 3525 3526 CONFIGFS_ATTR_RO(target_, hba_info); 3527 CONFIGFS_ATTR(target_, hba_mode); 3528 3529 static void target_core_hba_release(struct config_item *item) 3530 { 3531 struct se_hba *hba = container_of(to_config_group(item), 3532 struct se_hba, hba_group); 3533 core_delete_hba(hba); 3534 } 3535 3536 static struct configfs_attribute *target_core_hba_attrs[] = { 3537 &target_attr_hba_info, 3538 &target_attr_hba_mode, 3539 NULL, 3540 }; 3541 3542 static struct configfs_item_operations target_core_hba_item_ops = { 3543 .release = target_core_hba_release, 3544 }; 3545 3546 static const struct config_item_type target_core_hba_cit = { 3547 .ct_item_ops = &target_core_hba_item_ops, 3548 .ct_group_ops = &target_core_hba_group_ops, 3549 .ct_attrs = target_core_hba_attrs, 3550 .ct_owner = THIS_MODULE, 3551 }; 3552 3553 static struct config_group *target_core_call_addhbatotarget( 3554 struct config_group *group, 3555 const char *name) 3556 { 3557 char *se_plugin_str, *str, *str2; 3558 struct se_hba *hba; 3559 char buf[TARGET_CORE_NAME_MAX_LEN] = { }; 3560 unsigned long plugin_dep_id = 0; 3561 int ret; 3562 3563 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 3564 pr_err("Passed *name strlen(): %d exceeds" 3565 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 3566 TARGET_CORE_NAME_MAX_LEN); 3567 return ERR_PTR(-ENAMETOOLONG); 3568 } 3569 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 3570 3571 str = strstr(buf, "_"); 3572 if (!str) { 3573 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 3574 return ERR_PTR(-EINVAL); 3575 } 3576 se_plugin_str = buf; 3577 /* 3578 * Special case for subsystem plugins that have "_" in their names. 3579 * Namely rd_direct and rd_mcp.. 3580 */ 3581 str2 = strstr(str+1, "_"); 3582 if (str2) { 3583 *str2 = '\0'; /* Terminate for *se_plugin_str */ 3584 str2++; /* Skip to start of plugin dependent ID */ 3585 str = str2; 3586 } else { 3587 *str = '\0'; /* Terminate for *se_plugin_str */ 3588 str++; /* Skip to start of plugin dependent ID */ 3589 } 3590 3591 ret = kstrtoul(str, 0, &plugin_dep_id); 3592 if (ret < 0) { 3593 pr_err("kstrtoul() returned %d for" 3594 " plugin_dep_id\n", ret); 3595 return ERR_PTR(ret); 3596 } 3597 /* 3598 * Load up TCM subsystem plugins if they have not already been loaded. 3599 */ 3600 transport_subsystem_check_init(); 3601 3602 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 3603 if (IS_ERR(hba)) 3604 return ERR_CAST(hba); 3605 3606 config_group_init_type_name(&hba->hba_group, name, 3607 &target_core_hba_cit); 3608 3609 return &hba->hba_group; 3610 } 3611 3612 static void target_core_call_delhbafromtarget( 3613 struct config_group *group, 3614 struct config_item *item) 3615 { 3616 /* 3617 * core_delete_hba() is called from target_core_hba_item_ops->release() 3618 * -> target_core_hba_release() 3619 */ 3620 config_item_put(item); 3621 } 3622 3623 static struct configfs_group_operations target_core_group_ops = { 3624 .make_group = target_core_call_addhbatotarget, 3625 .drop_item = target_core_call_delhbafromtarget, 3626 }; 3627 3628 static const struct config_item_type target_core_cit = { 3629 .ct_item_ops = NULL, 3630 .ct_group_ops = &target_core_group_ops, 3631 .ct_attrs = NULL, 3632 .ct_owner = THIS_MODULE, 3633 }; 3634 3635 /* Stop functions for struct config_item_type target_core_hba_cit */ 3636 3637 void target_setup_backend_cits(struct target_backend *tb) 3638 { 3639 target_core_setup_dev_cit(tb); 3640 target_core_setup_dev_action_cit(tb); 3641 target_core_setup_dev_attrib_cit(tb); 3642 target_core_setup_dev_pr_cit(tb); 3643 target_core_setup_dev_wwn_cit(tb); 3644 target_core_setup_dev_alua_tg_pt_gps_cit(tb); 3645 target_core_setup_dev_stat_cit(tb); 3646 } 3647 3648 static void target_init_dbroot(void) 3649 { 3650 struct file *fp; 3651 3652 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED); 3653 fp = filp_open(db_root_stage, O_RDONLY, 0); 3654 if (IS_ERR(fp)) { 3655 pr_err("db_root: cannot open: %s\n", db_root_stage); 3656 return; 3657 } 3658 if (!S_ISDIR(file_inode(fp)->i_mode)) { 3659 filp_close(fp, NULL); 3660 pr_err("db_root: not a valid directory: %s\n", db_root_stage); 3661 return; 3662 } 3663 filp_close(fp, NULL); 3664 3665 strscpy(db_root, db_root_stage); 3666 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); 3667 } 3668 3669 static int __init target_core_init_configfs(void) 3670 { 3671 struct configfs_subsystem *subsys = &target_core_fabrics; 3672 struct t10_alua_lu_gp *lu_gp; 3673 struct cred *kern_cred; 3674 const struct cred *old_cred; 3675 int ret; 3676 3677 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 3678 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3679 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3680 3681 config_group_init(&subsys->su_group); 3682 mutex_init(&subsys->su_mutex); 3683 3684 ret = init_se_kmem_caches(); 3685 if (ret < 0) 3686 return ret; 3687 /* 3688 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3689 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3690 */ 3691 config_group_init_type_name(&target_core_hbagroup, "core", 3692 &target_core_cit); 3693 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group); 3694 3695 /* 3696 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3697 */ 3698 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit); 3699 configfs_add_default_group(&alua_group, &target_core_hbagroup); 3700 3701 /* 3702 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3703 * groups under /sys/kernel/config/target/core/alua/ 3704 */ 3705 config_group_init_type_name(&alua_lu_gps_group, "lu_gps", 3706 &target_core_alua_lu_gps_cit); 3707 configfs_add_default_group(&alua_lu_gps_group, &alua_group); 3708 3709 /* 3710 * Add core/alua/lu_gps/default_lu_gp 3711 */ 3712 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3713 if (IS_ERR(lu_gp)) { 3714 ret = -ENOMEM; 3715 goto out_global; 3716 } 3717 3718 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3719 &target_core_alua_lu_gp_cit); 3720 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group); 3721 3722 default_lu_gp = lu_gp; 3723 3724 /* 3725 * Register the target_core_mod subsystem with configfs. 3726 */ 3727 ret = configfs_register_subsystem(subsys); 3728 if (ret < 0) { 3729 pr_err("Error %d while registering subsystem %s\n", 3730 ret, subsys->su_group.cg_item.ci_namebuf); 3731 goto out_global; 3732 } 3733 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 3734 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s" 3735 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3736 /* 3737 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3738 */ 3739 ret = rd_module_init(); 3740 if (ret < 0) 3741 goto out; 3742 3743 ret = core_dev_setup_virtual_lun0(); 3744 if (ret < 0) 3745 goto out; 3746 3747 ret = target_xcopy_setup_pt(); 3748 if (ret < 0) 3749 goto out; 3750 3751 /* We use the kernel credentials to access the target directory */ 3752 kern_cred = prepare_kernel_cred(&init_task); 3753 if (!kern_cred) { 3754 ret = -ENOMEM; 3755 goto out; 3756 } 3757 old_cred = override_creds(kern_cred); 3758 target_init_dbroot(); 3759 revert_creds(old_cred); 3760 put_cred(kern_cred); 3761 3762 return 0; 3763 3764 out: 3765 target_xcopy_release_pt(); 3766 configfs_unregister_subsystem(subsys); 3767 core_dev_release_virtual_lun0(); 3768 rd_module_exit(); 3769 out_global: 3770 if (default_lu_gp) { 3771 core_alua_free_lu_gp(default_lu_gp); 3772 default_lu_gp = NULL; 3773 } 3774 release_se_kmem_caches(); 3775 return ret; 3776 } 3777 3778 static void __exit target_core_exit_configfs(void) 3779 { 3780 configfs_remove_default_groups(&alua_lu_gps_group); 3781 configfs_remove_default_groups(&alua_group); 3782 configfs_remove_default_groups(&target_core_hbagroup); 3783 3784 /* 3785 * We expect subsys->su_group.default_groups to be released 3786 * by configfs subsystem provider logic.. 3787 */ 3788 configfs_unregister_subsystem(&target_core_fabrics); 3789 3790 core_alua_free_lu_gp(default_lu_gp); 3791 default_lu_gp = NULL; 3792 3793 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3794 " Infrastructure\n"); 3795 3796 core_dev_release_virtual_lun0(); 3797 rd_module_exit(); 3798 target_xcopy_release_pt(); 3799 release_se_kmem_caches(); 3800 } 3801 3802 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3803 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3804 MODULE_LICENSE("GPL"); 3805 3806 module_init(target_core_init_configfs); 3807 module_exit(target_core_exit_configfs); 3808