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) \ 44static 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) \ 56static 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 67extern struct t10_alua_lu_gp *default_lu_gp; 68 69static LIST_HEAD(g_tf_list); 70static DEFINE_MUTEX(g_tf_lock); 71 72static struct config_group target_core_hbagroup; 73static struct config_group alua_group; 74static struct config_group alua_lu_gps_group; 75 76static unsigned int target_devices; 77static DEFINE_MUTEX(target_devices_lock); 78 79static inline struct se_hba * 80item_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 */ 88static 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 96CONFIGFS_ATTR_RO(target_core_item_, version); 97 98char db_root[DB_ROOT_LEN] = DB_ROOT_DEFAULT; 99static char db_root_stage[DB_ROOT_LEN]; 100 101static 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 107static 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 = snprintf(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 strncpy(db_root, db_root_stage, read_bytes); 147 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); 148 149 r = read_bytes; 150 151unlock: 152 mutex_unlock(&target_devices_lock); 153 return r; 154} 155 156CONFIGFS_ATTR(target_core_item_, dbroot); 157 158static 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 */ 185static 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 */ 270static 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 291static 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 */ 299static 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 */ 308static 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 314static 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 323int target_depend_item(struct config_item *item) 324{ 325 return configfs_depend_item(&target_core_fabrics, item); 326} 327EXPORT_SYMBOL(target_depend_item); 328 329void target_undepend_item(struct config_item *item) 330{ 331 return configfs_undepend_item(item); 332} 333EXPORT_SYMBOL(target_undepend_item); 334 335/*############################################################################## 336// Start functions called by external Target Fabrics Modules 337//############################################################################*/ 338static int target_disable_feature(struct se_portal_group *se_tpg) 339{ 340 return 0; 341} 342 343static u32 target_default_get_inst_index(struct se_portal_group *se_tpg) 344{ 345 return 1; 346} 347 348static u32 target_default_sess_get_index(struct se_session *se_sess) 349{ 350 return 0; 351} 352 353static void target_set_default_node_attributes(struct se_node_acl *se_acl) 354{ 355} 356 357static int target_default_get_cmd_state(struct se_cmd *se_cmd) 358{ 359 return 0; 360} 361 362static 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 441static 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 468int 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} 503EXPORT_SYMBOL(target_register_template); 504 505void 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} 529EXPORT_SYMBOL(target_unregister_template); 530 531/*############################################################################## 532// Stop functions called by external Target Fabrics Modules 533//############################################################################*/ 534 535static 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) \ 543static 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 548DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias); 549DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo); 550DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write); 551DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read); 552DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache); 553DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl); 554DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas); 555DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu); 556DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws); 557DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw); 558DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc); 559DEF_CONFIGFS_ATTRIB_SHOW(emulate_pr); 560DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type); 561DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type); 562DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify); 563DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids); 564DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot); 565DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord); 566DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl); 567DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size); 568DEF_CONFIGFS_ATTRIB_SHOW(block_size); 569DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors); 570DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors); 571DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth); 572DEF_CONFIGFS_ATTRIB_SHOW(queue_depth); 573DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count); 574DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count); 575DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity); 576DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment); 577DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data); 578DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len); 579DEF_CONFIGFS_ATTRIB_SHOW(emulate_rsoc); 580DEF_CONFIGFS_ATTRIB_SHOW(submit_type); 581 582#define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \ 583static 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 597DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count); 598DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count); 599DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity); 600DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment); 601DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len); 602 603#define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \ 604static 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 618DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write); 619DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw); 620DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc); 621DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr); 622DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids); 623DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot); 624 625#define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \ 626static 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 635DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo); 636DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read); 637 638static 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 656static 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 sizeof(dev->t10_wwn.model)); 681 } 682 da->emulate_model_alias = flag; 683 return count; 684} 685 686static ssize_t emulate_write_cache_store(struct config_item *item, 687 const char *page, size_t count) 688{ 689 struct se_dev_attrib *da = to_attrib(item); 690 bool flag; 691 int ret; 692 693 ret = kstrtobool(page, &flag); 694 if (ret < 0) 695 return ret; 696 697 if (flag && da->da_dev->transport->get_write_cache) { 698 pr_err("emulate_write_cache not supported for this device\n"); 699 return -EINVAL; 700 } 701 702 da->emulate_write_cache = flag; 703 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 704 da->da_dev, flag); 705 return count; 706} 707 708static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item, 709 const char *page, size_t count) 710{ 711 struct se_dev_attrib *da = to_attrib(item); 712 u32 val; 713 int ret; 714 715 ret = kstrtou32(page, 0, &val); 716 if (ret < 0) 717 return ret; 718 719 if (val != TARGET_UA_INTLCK_CTRL_CLEAR 720 && val != TARGET_UA_INTLCK_CTRL_NO_CLEAR 721 && val != TARGET_UA_INTLCK_CTRL_ESTABLISH_UA) { 722 pr_err("Illegal value %d\n", val); 723 return -EINVAL; 724 } 725 726 if (da->da_dev->export_count) { 727 pr_err("dev[%p]: Unable to change SE Device" 728 " UA_INTRLCK_CTRL while export_count is %d\n", 729 da->da_dev, da->da_dev->export_count); 730 return -EINVAL; 731 } 732 da->emulate_ua_intlck_ctrl = val; 733 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 734 da->da_dev, val); 735 return count; 736} 737 738static ssize_t emulate_tas_store(struct config_item *item, 739 const char *page, size_t count) 740{ 741 struct se_dev_attrib *da = to_attrib(item); 742 bool flag; 743 int ret; 744 745 ret = kstrtobool(page, &flag); 746 if (ret < 0) 747 return ret; 748 749 if (da->da_dev->export_count) { 750 pr_err("dev[%p]: Unable to change SE Device TAS while" 751 " export_count is %d\n", 752 da->da_dev, da->da_dev->export_count); 753 return -EINVAL; 754 } 755 da->emulate_tas = flag; 756 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 757 da->da_dev, flag ? "Enabled" : "Disabled"); 758 759 return count; 760} 761 762static int target_try_configure_unmap(struct se_device *dev, 763 const char *config_opt) 764{ 765 if (!dev->transport->configure_unmap) { 766 pr_err("Generic Block Discard not supported\n"); 767 return -ENOSYS; 768 } 769 770 if (!target_dev_configured(dev)) { 771 pr_err("Generic Block Discard setup for %s requires device to be configured\n", 772 config_opt); 773 return -ENODEV; 774 } 775 776 if (!dev->transport->configure_unmap(dev)) { 777 pr_err("Generic Block Discard setup for %s failed\n", 778 config_opt); 779 return -ENOSYS; 780 } 781 782 return 0; 783} 784 785static ssize_t emulate_tpu_store(struct config_item *item, 786 const char *page, size_t count) 787{ 788 struct se_dev_attrib *da = to_attrib(item); 789 struct se_device *dev = da->da_dev; 790 bool flag; 791 int ret; 792 793 ret = kstrtobool(page, &flag); 794 if (ret < 0) 795 return ret; 796 797 /* 798 * We expect this value to be non-zero when generic Block Layer 799 * Discard supported is detected iblock_create_virtdevice(). 800 */ 801 if (flag && !da->max_unmap_block_desc_count) { 802 ret = target_try_configure_unmap(dev, "emulate_tpu"); 803 if (ret) 804 return ret; 805 } 806 807 da->emulate_tpu = flag; 808 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 809 da->da_dev, flag); 810 return count; 811} 812 813static ssize_t emulate_tpws_store(struct config_item *item, 814 const char *page, size_t count) 815{ 816 struct se_dev_attrib *da = to_attrib(item); 817 struct se_device *dev = da->da_dev; 818 bool flag; 819 int ret; 820 821 ret = kstrtobool(page, &flag); 822 if (ret < 0) 823 return ret; 824 825 /* 826 * We expect this value to be non-zero when generic Block Layer 827 * Discard supported is detected iblock_create_virtdevice(). 828 */ 829 if (flag && !da->max_unmap_block_desc_count) { 830 ret = target_try_configure_unmap(dev, "emulate_tpws"); 831 if (ret) 832 return ret; 833 } 834 835 da->emulate_tpws = flag; 836 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 837 da->da_dev, flag); 838 return count; 839} 840 841static ssize_t pi_prot_type_store(struct config_item *item, 842 const char *page, size_t count) 843{ 844 struct se_dev_attrib *da = to_attrib(item); 845 int old_prot = da->pi_prot_type, ret; 846 struct se_device *dev = da->da_dev; 847 u32 flag; 848 849 ret = kstrtou32(page, 0, &flag); 850 if (ret < 0) 851 return ret; 852 853 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) { 854 pr_err("Illegal value %d for pi_prot_type\n", flag); 855 return -EINVAL; 856 } 857 if (flag == 2) { 858 pr_err("DIF TYPE2 protection currently not supported\n"); 859 return -ENOSYS; 860 } 861 if (da->hw_pi_prot_type) { 862 pr_warn("DIF protection enabled on underlying hardware," 863 " ignoring\n"); 864 return count; 865 } 866 if (!dev->transport->init_prot || !dev->transport->free_prot) { 867 /* 0 is only allowed value for non-supporting backends */ 868 if (flag == 0) 869 return count; 870 871 pr_err("DIF protection not supported by backend: %s\n", 872 dev->transport->name); 873 return -ENOSYS; 874 } 875 if (!target_dev_configured(dev)) { 876 pr_err("DIF protection requires device to be configured\n"); 877 return -ENODEV; 878 } 879 if (dev->export_count) { 880 pr_err("dev[%p]: Unable to change SE Device PROT type while" 881 " export_count is %d\n", dev, dev->export_count); 882 return -EINVAL; 883 } 884 885 da->pi_prot_type = flag; 886 887 if (flag && !old_prot) { 888 ret = dev->transport->init_prot(dev); 889 if (ret) { 890 da->pi_prot_type = old_prot; 891 da->pi_prot_verify = (bool) da->pi_prot_type; 892 return ret; 893 } 894 895 } else if (!flag && old_prot) { 896 dev->transport->free_prot(dev); 897 } 898 899 da->pi_prot_verify = (bool) da->pi_prot_type; 900 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag); 901 return count; 902} 903 904/* always zero, but attr needs to remain RW to avoid userspace breakage */ 905static ssize_t pi_prot_format_show(struct config_item *item, char *page) 906{ 907 return snprintf(page, PAGE_SIZE, "0\n"); 908} 909 910static ssize_t pi_prot_format_store(struct config_item *item, 911 const char *page, size_t count) 912{ 913 struct se_dev_attrib *da = to_attrib(item); 914 struct se_device *dev = da->da_dev; 915 bool flag; 916 int ret; 917 918 ret = kstrtobool(page, &flag); 919 if (ret < 0) 920 return ret; 921 922 if (!flag) 923 return count; 924 925 if (!dev->transport->format_prot) { 926 pr_err("DIF protection format not supported by backend %s\n", 927 dev->transport->name); 928 return -ENOSYS; 929 } 930 if (!target_dev_configured(dev)) { 931 pr_err("DIF protection format requires device to be configured\n"); 932 return -ENODEV; 933 } 934 if (dev->export_count) { 935 pr_err("dev[%p]: Unable to format SE Device PROT type while" 936 " export_count is %d\n", dev, dev->export_count); 937 return -EINVAL; 938 } 939 940 ret = dev->transport->format_prot(dev); 941 if (ret) 942 return ret; 943 944 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev); 945 return count; 946} 947 948static ssize_t pi_prot_verify_store(struct config_item *item, 949 const char *page, size_t count) 950{ 951 struct se_dev_attrib *da = to_attrib(item); 952 bool flag; 953 int ret; 954 955 ret = kstrtobool(page, &flag); 956 if (ret < 0) 957 return ret; 958 959 if (!flag) { 960 da->pi_prot_verify = flag; 961 return count; 962 } 963 if (da->hw_pi_prot_type) { 964 pr_warn("DIF protection enabled on underlying hardware," 965 " ignoring\n"); 966 return count; 967 } 968 if (!da->pi_prot_type) { 969 pr_warn("DIF protection not supported by backend, ignoring\n"); 970 return count; 971 } 972 da->pi_prot_verify = flag; 973 974 return count; 975} 976 977static ssize_t force_pr_aptpl_store(struct config_item *item, 978 const char *page, size_t count) 979{ 980 struct se_dev_attrib *da = to_attrib(item); 981 bool flag; 982 int ret; 983 984 ret = kstrtobool(page, &flag); 985 if (ret < 0) 986 return ret; 987 if (da->da_dev->export_count) { 988 pr_err("dev[%p]: Unable to set force_pr_aptpl while" 989 " export_count is %d\n", 990 da->da_dev, da->da_dev->export_count); 991 return -EINVAL; 992 } 993 994 da->force_pr_aptpl = flag; 995 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag); 996 return count; 997} 998 999static ssize_t emulate_rest_reord_store(struct config_item *item, 1000 const char *page, size_t count) 1001{ 1002 struct se_dev_attrib *da = to_attrib(item); 1003 bool flag; 1004 int ret; 1005 1006 ret = kstrtobool(page, &flag); 1007 if (ret < 0) 1008 return ret; 1009 1010 if (flag != 0) { 1011 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted" 1012 " reordering not implemented\n", da->da_dev); 1013 return -ENOSYS; 1014 } 1015 da->emulate_rest_reord = flag; 1016 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", 1017 da->da_dev, flag); 1018 return count; 1019} 1020 1021static ssize_t unmap_zeroes_data_store(struct config_item *item, 1022 const char *page, size_t count) 1023{ 1024 struct se_dev_attrib *da = to_attrib(item); 1025 struct se_device *dev = da->da_dev; 1026 bool flag; 1027 int ret; 1028 1029 ret = kstrtobool(page, &flag); 1030 if (ret < 0) 1031 return ret; 1032 1033 if (da->da_dev->export_count) { 1034 pr_err("dev[%p]: Unable to change SE Device" 1035 " unmap_zeroes_data while export_count is %d\n", 1036 da->da_dev, da->da_dev->export_count); 1037 return -EINVAL; 1038 } 1039 /* 1040 * We expect this value to be non-zero when generic Block Layer 1041 * Discard supported is detected iblock_configure_device(). 1042 */ 1043 if (flag && !da->max_unmap_block_desc_count) { 1044 ret = target_try_configure_unmap(dev, "unmap_zeroes_data"); 1045 if (ret) 1046 return ret; 1047 } 1048 da->unmap_zeroes_data = flag; 1049 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n", 1050 da->da_dev, flag); 1051 return count; 1052} 1053 1054/* 1055 * Note, this can only be called on unexported SE Device Object. 1056 */ 1057static ssize_t queue_depth_store(struct config_item *item, 1058 const char *page, size_t count) 1059{ 1060 struct se_dev_attrib *da = to_attrib(item); 1061 struct se_device *dev = da->da_dev; 1062 u32 val; 1063 int ret; 1064 1065 ret = kstrtou32(page, 0, &val); 1066 if (ret < 0) 1067 return ret; 1068 1069 if (dev->export_count) { 1070 pr_err("dev[%p]: Unable to change SE Device TCQ while" 1071 " export_count is %d\n", 1072 dev, dev->export_count); 1073 return -EINVAL; 1074 } 1075 if (!val) { 1076 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev); 1077 return -EINVAL; 1078 } 1079 1080 if (val > dev->dev_attrib.queue_depth) { 1081 if (val > dev->dev_attrib.hw_queue_depth) { 1082 pr_err("dev[%p]: Passed queue_depth:" 1083 " %u exceeds TCM/SE_Device MAX" 1084 " TCQ: %u\n", dev, val, 1085 dev->dev_attrib.hw_queue_depth); 1086 return -EINVAL; 1087 } 1088 } 1089 da->queue_depth = dev->queue_depth = val; 1090 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val); 1091 return count; 1092} 1093 1094static ssize_t optimal_sectors_store(struct config_item *item, 1095 const char *page, size_t count) 1096{ 1097 struct se_dev_attrib *da = to_attrib(item); 1098 u32 val; 1099 int ret; 1100 1101 ret = kstrtou32(page, 0, &val); 1102 if (ret < 0) 1103 return ret; 1104 1105 if (da->da_dev->export_count) { 1106 pr_err("dev[%p]: Unable to change SE Device" 1107 " optimal_sectors while export_count is %d\n", 1108 da->da_dev, da->da_dev->export_count); 1109 return -EINVAL; 1110 } 1111 if (val > da->hw_max_sectors) { 1112 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1113 " greater than hw_max_sectors: %u\n", 1114 da->da_dev, val, da->hw_max_sectors); 1115 return -EINVAL; 1116 } 1117 1118 da->optimal_sectors = val; 1119 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1120 da->da_dev, val); 1121 return count; 1122} 1123 1124static ssize_t block_size_store(struct config_item *item, 1125 const char *page, size_t count) 1126{ 1127 struct se_dev_attrib *da = to_attrib(item); 1128 u32 val; 1129 int ret; 1130 1131 ret = kstrtou32(page, 0, &val); 1132 if (ret < 0) 1133 return ret; 1134 1135 if (da->da_dev->export_count) { 1136 pr_err("dev[%p]: Unable to change SE Device block_size" 1137 " while export_count is %d\n", 1138 da->da_dev, da->da_dev->export_count); 1139 return -EINVAL; 1140 } 1141 1142 if (val != 512 && val != 1024 && val != 2048 && val != 4096) { 1143 pr_err("dev[%p]: Illegal value for block_device: %u" 1144 " for SE device, must be 512, 1024, 2048 or 4096\n", 1145 da->da_dev, val); 1146 return -EINVAL; 1147 } 1148 1149 da->block_size = val; 1150 1151 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1152 da->da_dev, val); 1153 return count; 1154} 1155 1156static ssize_t alua_support_show(struct config_item *item, char *page) 1157{ 1158 struct se_dev_attrib *da = to_attrib(item); 1159 u8 flags = da->da_dev->transport_flags; 1160 1161 return snprintf(page, PAGE_SIZE, "%d\n", 1162 flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1); 1163} 1164 1165static ssize_t alua_support_store(struct config_item *item, 1166 const char *page, size_t count) 1167{ 1168 struct se_dev_attrib *da = to_attrib(item); 1169 struct se_device *dev = da->da_dev; 1170 bool flag, oldflag; 1171 int ret; 1172 1173 ret = kstrtobool(page, &flag); 1174 if (ret < 0) 1175 return ret; 1176 1177 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA); 1178 if (flag == oldflag) 1179 return count; 1180 1181 if (!(dev->transport->transport_flags_changeable & 1182 TRANSPORT_FLAG_PASSTHROUGH_ALUA)) { 1183 pr_err("dev[%p]: Unable to change SE Device alua_support:" 1184 " alua_support has fixed value\n", dev); 1185 return -ENOSYS; 1186 } 1187 1188 if (flag) 1189 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_ALUA; 1190 else 1191 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_ALUA; 1192 return count; 1193} 1194 1195static ssize_t pgr_support_show(struct config_item *item, char *page) 1196{ 1197 struct se_dev_attrib *da = to_attrib(item); 1198 u8 flags = da->da_dev->transport_flags; 1199 1200 return snprintf(page, PAGE_SIZE, "%d\n", 1201 flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1); 1202} 1203 1204static ssize_t pgr_support_store(struct config_item *item, 1205 const char *page, size_t count) 1206{ 1207 struct se_dev_attrib *da = to_attrib(item); 1208 struct se_device *dev = da->da_dev; 1209 bool flag, oldflag; 1210 int ret; 1211 1212 ret = kstrtobool(page, &flag); 1213 if (ret < 0) 1214 return ret; 1215 1216 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR); 1217 if (flag == oldflag) 1218 return count; 1219 1220 if (!(dev->transport->transport_flags_changeable & 1221 TRANSPORT_FLAG_PASSTHROUGH_PGR)) { 1222 pr_err("dev[%p]: Unable to change SE Device pgr_support:" 1223 " pgr_support has fixed value\n", dev); 1224 return -ENOSYS; 1225 } 1226 1227 if (flag) 1228 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_PGR; 1229 else 1230 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_PGR; 1231 return count; 1232} 1233 1234static ssize_t emulate_rsoc_store(struct config_item *item, 1235 const char *page, size_t count) 1236{ 1237 struct se_dev_attrib *da = to_attrib(item); 1238 bool flag; 1239 int ret; 1240 1241 ret = kstrtobool(page, &flag); 1242 if (ret < 0) 1243 return ret; 1244 1245 da->emulate_rsoc = flag; 1246 pr_debug("dev[%p]: SE Device REPORT_SUPPORTED_OPERATION_CODES_EMULATION flag: %d\n", 1247 da->da_dev, flag); 1248 return count; 1249} 1250 1251static ssize_t submit_type_store(struct config_item *item, const char *page, 1252 size_t count) 1253{ 1254 struct se_dev_attrib *da = to_attrib(item); 1255 int ret; 1256 u8 val; 1257 1258 ret = kstrtou8(page, 0, &val); 1259 if (ret < 0) 1260 return ret; 1261 1262 if (val > TARGET_QUEUE_SUBMIT) 1263 return -EINVAL; 1264 1265 da->submit_type = val; 1266 return count; 1267} 1268 1269CONFIGFS_ATTR(, emulate_model_alias); 1270CONFIGFS_ATTR(, emulate_dpo); 1271CONFIGFS_ATTR(, emulate_fua_write); 1272CONFIGFS_ATTR(, emulate_fua_read); 1273CONFIGFS_ATTR(, emulate_write_cache); 1274CONFIGFS_ATTR(, emulate_ua_intlck_ctrl); 1275CONFIGFS_ATTR(, emulate_tas); 1276CONFIGFS_ATTR(, emulate_tpu); 1277CONFIGFS_ATTR(, emulate_tpws); 1278CONFIGFS_ATTR(, emulate_caw); 1279CONFIGFS_ATTR(, emulate_3pc); 1280CONFIGFS_ATTR(, emulate_pr); 1281CONFIGFS_ATTR(, emulate_rsoc); 1282CONFIGFS_ATTR(, pi_prot_type); 1283CONFIGFS_ATTR_RO(, hw_pi_prot_type); 1284CONFIGFS_ATTR(, pi_prot_format); 1285CONFIGFS_ATTR(, pi_prot_verify); 1286CONFIGFS_ATTR(, enforce_pr_isids); 1287CONFIGFS_ATTR(, is_nonrot); 1288CONFIGFS_ATTR(, emulate_rest_reord); 1289CONFIGFS_ATTR(, force_pr_aptpl); 1290CONFIGFS_ATTR_RO(, hw_block_size); 1291CONFIGFS_ATTR(, block_size); 1292CONFIGFS_ATTR_RO(, hw_max_sectors); 1293CONFIGFS_ATTR(, optimal_sectors); 1294CONFIGFS_ATTR_RO(, hw_queue_depth); 1295CONFIGFS_ATTR(, queue_depth); 1296CONFIGFS_ATTR(, max_unmap_lba_count); 1297CONFIGFS_ATTR(, max_unmap_block_desc_count); 1298CONFIGFS_ATTR(, unmap_granularity); 1299CONFIGFS_ATTR(, unmap_granularity_alignment); 1300CONFIGFS_ATTR(, unmap_zeroes_data); 1301CONFIGFS_ATTR(, max_write_same_len); 1302CONFIGFS_ATTR(, alua_support); 1303CONFIGFS_ATTR(, pgr_support); 1304CONFIGFS_ATTR(, submit_type); 1305 1306/* 1307 * dev_attrib attributes for devices using the target core SBC/SPC 1308 * interpreter. Any backend using spc_parse_cdb should be using 1309 * these. 1310 */ 1311struct configfs_attribute *sbc_attrib_attrs[] = { 1312 &attr_emulate_model_alias, 1313 &attr_emulate_dpo, 1314 &attr_emulate_fua_write, 1315 &attr_emulate_fua_read, 1316 &attr_emulate_write_cache, 1317 &attr_emulate_ua_intlck_ctrl, 1318 &attr_emulate_tas, 1319 &attr_emulate_tpu, 1320 &attr_emulate_tpws, 1321 &attr_emulate_caw, 1322 &attr_emulate_3pc, 1323 &attr_emulate_pr, 1324 &attr_pi_prot_type, 1325 &attr_hw_pi_prot_type, 1326 &attr_pi_prot_format, 1327 &attr_pi_prot_verify, 1328 &attr_enforce_pr_isids, 1329 &attr_is_nonrot, 1330 &attr_emulate_rest_reord, 1331 &attr_force_pr_aptpl, 1332 &attr_hw_block_size, 1333 &attr_block_size, 1334 &attr_hw_max_sectors, 1335 &attr_optimal_sectors, 1336 &attr_hw_queue_depth, 1337 &attr_queue_depth, 1338 &attr_max_unmap_lba_count, 1339 &attr_max_unmap_block_desc_count, 1340 &attr_unmap_granularity, 1341 &attr_unmap_granularity_alignment, 1342 &attr_unmap_zeroes_data, 1343 &attr_max_write_same_len, 1344 &attr_alua_support, 1345 &attr_pgr_support, 1346 &attr_emulate_rsoc, 1347 &attr_submit_type, 1348 NULL, 1349}; 1350EXPORT_SYMBOL(sbc_attrib_attrs); 1351 1352/* 1353 * Minimal dev_attrib attributes for devices passing through CDBs. 1354 * In this case we only provide a few read-only attributes for 1355 * backwards compatibility. 1356 */ 1357struct configfs_attribute *passthrough_attrib_attrs[] = { 1358 &attr_hw_pi_prot_type, 1359 &attr_hw_block_size, 1360 &attr_hw_max_sectors, 1361 &attr_hw_queue_depth, 1362 &attr_emulate_pr, 1363 &attr_alua_support, 1364 &attr_pgr_support, 1365 &attr_submit_type, 1366 NULL, 1367}; 1368EXPORT_SYMBOL(passthrough_attrib_attrs); 1369 1370/* 1371 * pr related dev_attrib attributes for devices passing through CDBs, 1372 * but allowing in core pr emulation. 1373 */ 1374struct configfs_attribute *passthrough_pr_attrib_attrs[] = { 1375 &attr_enforce_pr_isids, 1376 &attr_force_pr_aptpl, 1377 NULL, 1378}; 1379EXPORT_SYMBOL(passthrough_pr_attrib_attrs); 1380 1381TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL); 1382TB_CIT_SETUP_DRV(dev_action, NULL, NULL); 1383 1384/* End functions for struct config_item_type tb_dev_attrib_cit */ 1385 1386/* Start functions for struct config_item_type tb_dev_wwn_cit */ 1387 1388static struct t10_wwn *to_t10_wwn(struct config_item *item) 1389{ 1390 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group); 1391} 1392 1393static ssize_t target_check_inquiry_data(char *buf) 1394{ 1395 size_t len; 1396 int i; 1397 1398 len = strlen(buf); 1399 1400 /* 1401 * SPC 4.3.1: 1402 * ASCII data fields shall contain only ASCII printable characters 1403 * (i.e., code values 20h to 7Eh) and may be terminated with one or 1404 * more ASCII null (00h) characters. 1405 */ 1406 for (i = 0; i < len; i++) { 1407 if (buf[i] < 0x20 || buf[i] > 0x7E) { 1408 pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n"); 1409 return -EINVAL; 1410 } 1411 } 1412 1413 return len; 1414} 1415 1416/* 1417 * STANDARD and VPD page 0x83 T10 Vendor Identification 1418 */ 1419static ssize_t target_wwn_vendor_id_show(struct config_item *item, 1420 char *page) 1421{ 1422 return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]); 1423} 1424 1425static ssize_t target_wwn_vendor_id_store(struct config_item *item, 1426 const char *page, size_t count) 1427{ 1428 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1429 struct se_device *dev = t10_wwn->t10_dev; 1430 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1431 unsigned char buf[INQUIRY_VENDOR_LEN + 2]; 1432 char *stripped = NULL; 1433 ssize_t len; 1434 ssize_t ret; 1435 1436 len = strscpy(buf, page, sizeof(buf)); 1437 if (len > 0) { 1438 /* Strip any newline added from userspace. */ 1439 stripped = strstrip(buf); 1440 len = strlen(stripped); 1441 } 1442 if (len < 0 || len > INQUIRY_VENDOR_LEN) { 1443 pr_err("Emulated T10 Vendor Identification exceeds" 1444 " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN) 1445 "\n"); 1446 return -EOVERFLOW; 1447 } 1448 1449 ret = target_check_inquiry_data(stripped); 1450 1451 if (ret < 0) 1452 return ret; 1453 1454 /* 1455 * Check to see if any active exports exist. If they do exist, fail 1456 * here as changing this information on the fly (underneath the 1457 * initiator side OS dependent multipath code) could cause negative 1458 * effects. 1459 */ 1460 if (dev->export_count) { 1461 pr_err("Unable to set T10 Vendor Identification while" 1462 " active %d exports exist\n", dev->export_count); 1463 return -EINVAL; 1464 } 1465 1466 BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1); 1467 strscpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor)); 1468 1469 pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:" 1470 " %s\n", dev->t10_wwn.vendor); 1471 1472 return count; 1473} 1474 1475static ssize_t target_wwn_product_id_show(struct config_item *item, 1476 char *page) 1477{ 1478 return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]); 1479} 1480 1481static ssize_t target_wwn_product_id_store(struct config_item *item, 1482 const char *page, size_t count) 1483{ 1484 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1485 struct se_device *dev = t10_wwn->t10_dev; 1486 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1487 unsigned char buf[INQUIRY_MODEL_LEN + 2]; 1488 char *stripped = NULL; 1489 ssize_t len; 1490 ssize_t ret; 1491 1492 len = strscpy(buf, page, sizeof(buf)); 1493 if (len > 0) { 1494 /* Strip any newline added from userspace. */ 1495 stripped = strstrip(buf); 1496 len = strlen(stripped); 1497 } 1498 if (len < 0 || len > INQUIRY_MODEL_LEN) { 1499 pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: " 1500 __stringify(INQUIRY_MODEL_LEN) 1501 "\n"); 1502 return -EOVERFLOW; 1503 } 1504 1505 ret = target_check_inquiry_data(stripped); 1506 1507 if (ret < 0) 1508 return ret; 1509 1510 /* 1511 * Check to see if any active exports exist. If they do exist, fail 1512 * here as changing this information on the fly (underneath the 1513 * initiator side OS dependent multipath code) could cause negative 1514 * effects. 1515 */ 1516 if (dev->export_count) { 1517 pr_err("Unable to set T10 Model while active %d exports exist\n", 1518 dev->export_count); 1519 return -EINVAL; 1520 } 1521 1522 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); 1523 strscpy(dev->t10_wwn.model, stripped, sizeof(dev->t10_wwn.model)); 1524 1525 pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n", 1526 dev->t10_wwn.model); 1527 1528 return count; 1529} 1530 1531static ssize_t target_wwn_revision_show(struct config_item *item, 1532 char *page) 1533{ 1534 return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]); 1535} 1536 1537static ssize_t target_wwn_revision_store(struct config_item *item, 1538 const char *page, size_t count) 1539{ 1540 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1541 struct se_device *dev = t10_wwn->t10_dev; 1542 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1543 unsigned char buf[INQUIRY_REVISION_LEN + 2]; 1544 char *stripped = NULL; 1545 ssize_t len; 1546 ssize_t ret; 1547 1548 len = strscpy(buf, page, sizeof(buf)); 1549 if (len > 0) { 1550 /* Strip any newline added from userspace. */ 1551 stripped = strstrip(buf); 1552 len = strlen(stripped); 1553 } 1554 if (len < 0 || len > INQUIRY_REVISION_LEN) { 1555 pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: " 1556 __stringify(INQUIRY_REVISION_LEN) 1557 "\n"); 1558 return -EOVERFLOW; 1559 } 1560 1561 ret = target_check_inquiry_data(stripped); 1562 1563 if (ret < 0) 1564 return ret; 1565 1566 /* 1567 * Check to see if any active exports exist. If they do exist, fail 1568 * here as changing this information on the fly (underneath the 1569 * initiator side OS dependent multipath code) could cause negative 1570 * effects. 1571 */ 1572 if (dev->export_count) { 1573 pr_err("Unable to set T10 Revision while active %d exports exist\n", 1574 dev->export_count); 1575 return -EINVAL; 1576 } 1577 1578 BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1); 1579 strscpy(dev->t10_wwn.revision, stripped, sizeof(dev->t10_wwn.revision)); 1580 1581 pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n", 1582 dev->t10_wwn.revision); 1583 1584 return count; 1585} 1586 1587static ssize_t 1588target_wwn_company_id_show(struct config_item *item, 1589 char *page) 1590{ 1591 return snprintf(page, PAGE_SIZE, "%#08x\n", 1592 to_t10_wwn(item)->company_id); 1593} 1594 1595static ssize_t 1596target_wwn_company_id_store(struct config_item *item, 1597 const char *page, size_t count) 1598{ 1599 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1600 struct se_device *dev = t10_wwn->t10_dev; 1601 u32 val; 1602 int ret; 1603 1604 /* 1605 * The IEEE COMPANY_ID field should contain a 24-bit canonical 1606 * form OUI assigned by the IEEE. 1607 */ 1608 ret = kstrtou32(page, 0, &val); 1609 if (ret < 0) 1610 return ret; 1611 1612 if (val >= 0x1000000) 1613 return -EOVERFLOW; 1614 1615 /* 1616 * Check to see if any active exports exist. If they do exist, fail 1617 * here as changing this information on the fly (underneath the 1618 * initiator side OS dependent multipath code) could cause negative 1619 * effects. 1620 */ 1621 if (dev->export_count) { 1622 pr_err("Unable to set Company ID while %u exports exist\n", 1623 dev->export_count); 1624 return -EINVAL; 1625 } 1626 1627 t10_wwn->company_id = val; 1628 1629 pr_debug("Target_Core_ConfigFS: Set IEEE Company ID: %#08x\n", 1630 t10_wwn->company_id); 1631 1632 return count; 1633} 1634 1635/* 1636 * VPD page 0x80 Unit serial 1637 */ 1638static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item, 1639 char *page) 1640{ 1641 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 1642 &to_t10_wwn(item)->unit_serial[0]); 1643} 1644 1645static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item, 1646 const char *page, size_t count) 1647{ 1648 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1649 struct se_device *dev = t10_wwn->t10_dev; 1650 unsigned char buf[INQUIRY_VPD_SERIAL_LEN] = { }; 1651 1652 /* 1653 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 1654 * from the struct scsi_device level firmware, do not allow 1655 * VPD Unit Serial to be emulated. 1656 * 1657 * Note this struct scsi_device could also be emulating VPD 1658 * information from its drivers/scsi LLD. But for now we assume 1659 * it is doing 'the right thing' wrt a world wide unique 1660 * VPD Unit Serial Number that OS dependent multipath can depend on. 1661 */ 1662 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) { 1663 pr_err("Underlying SCSI device firmware provided VPD" 1664 " Unit Serial, ignoring request\n"); 1665 return -EOPNOTSUPP; 1666 } 1667 1668 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 1669 pr_err("Emulated VPD Unit Serial exceeds" 1670 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 1671 return -EOVERFLOW; 1672 } 1673 /* 1674 * Check to see if any active $FABRIC_MOD exports exist. If they 1675 * do exist, fail here as changing this information on the fly 1676 * (underneath the initiator side OS dependent multipath code) 1677 * could cause negative effects. 1678 */ 1679 if (dev->export_count) { 1680 pr_err("Unable to set VPD Unit Serial while" 1681 " active %d $FABRIC_MOD exports exist\n", 1682 dev->export_count); 1683 return -EINVAL; 1684 } 1685 1686 /* 1687 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 1688 * 1689 * Also, strip any newline added from the userspace 1690 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 1691 */ 1692 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 1693 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 1694 "%s", strstrip(buf)); 1695 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL; 1696 1697 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 1698 " %s\n", dev->t10_wwn.unit_serial); 1699 1700 return count; 1701} 1702 1703/* 1704 * VPD page 0x83 Protocol Identifier 1705 */ 1706static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item, 1707 char *page) 1708{ 1709 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1710 struct t10_vpd *vpd; 1711 unsigned char buf[VPD_TMP_BUF_SIZE] = { }; 1712 ssize_t len = 0; 1713 1714 spin_lock(&t10_wwn->t10_vpd_lock); 1715 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 1716 if (!vpd->protocol_identifier_set) 1717 continue; 1718 1719 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 1720 1721 if (len + strlen(buf) >= PAGE_SIZE) 1722 break; 1723 1724 len += sprintf(page+len, "%s", buf); 1725 } 1726 spin_unlock(&t10_wwn->t10_vpd_lock); 1727 1728 return len; 1729} 1730 1731/* 1732 * Generic wrapper for dumping VPD identifiers by association. 1733 */ 1734#define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 1735static ssize_t target_wwn_##_name##_show(struct config_item *item, \ 1736 char *page) \ 1737{ \ 1738 struct t10_wwn *t10_wwn = to_t10_wwn(item); \ 1739 struct t10_vpd *vpd; \ 1740 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 1741 ssize_t len = 0; \ 1742 \ 1743 spin_lock(&t10_wwn->t10_vpd_lock); \ 1744 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 1745 if (vpd->association != _assoc) \ 1746 continue; \ 1747 \ 1748 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1749 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 1750 if (len + strlen(buf) >= PAGE_SIZE) \ 1751 break; \ 1752 len += sprintf(page+len, "%s", buf); \ 1753 \ 1754 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1755 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 1756 if (len + strlen(buf) >= PAGE_SIZE) \ 1757 break; \ 1758 len += sprintf(page+len, "%s", buf); \ 1759 \ 1760 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1761 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 1762 if (len + strlen(buf) >= PAGE_SIZE) \ 1763 break; \ 1764 len += sprintf(page+len, "%s", buf); \ 1765 } \ 1766 spin_unlock(&t10_wwn->t10_vpd_lock); \ 1767 \ 1768 return len; \ 1769} 1770 1771/* VPD page 0x83 Association: Logical Unit */ 1772DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 1773/* VPD page 0x83 Association: Target Port */ 1774DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 1775/* VPD page 0x83 Association: SCSI Target Device */ 1776DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 1777 1778CONFIGFS_ATTR(target_wwn_, vendor_id); 1779CONFIGFS_ATTR(target_wwn_, product_id); 1780CONFIGFS_ATTR(target_wwn_, revision); 1781CONFIGFS_ATTR(target_wwn_, company_id); 1782CONFIGFS_ATTR(target_wwn_, vpd_unit_serial); 1783CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier); 1784CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit); 1785CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port); 1786CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device); 1787 1788static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 1789 &target_wwn_attr_vendor_id, 1790 &target_wwn_attr_product_id, 1791 &target_wwn_attr_revision, 1792 &target_wwn_attr_company_id, 1793 &target_wwn_attr_vpd_unit_serial, 1794 &target_wwn_attr_vpd_protocol_identifier, 1795 &target_wwn_attr_vpd_assoc_logical_unit, 1796 &target_wwn_attr_vpd_assoc_target_port, 1797 &target_wwn_attr_vpd_assoc_scsi_target_device, 1798 NULL, 1799}; 1800 1801TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs); 1802 1803/* End functions for struct config_item_type tb_dev_wwn_cit */ 1804 1805/* Start functions for struct config_item_type tb_dev_pr_cit */ 1806 1807static struct se_device *pr_to_dev(struct config_item *item) 1808{ 1809 return container_of(to_config_group(item), struct se_device, 1810 dev_pr_group); 1811} 1812 1813static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev, 1814 char *page) 1815{ 1816 struct se_node_acl *se_nacl; 1817 struct t10_pr_registration *pr_reg; 1818 char i_buf[PR_REG_ISID_ID_LEN] = { }; 1819 1820 pr_reg = dev->dev_pr_res_holder; 1821 if (!pr_reg) 1822 return sprintf(page, "No SPC-3 Reservation holder\n"); 1823 1824 se_nacl = pr_reg->pr_reg_nacl; 1825 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1826 1827 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", 1828 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1829 se_nacl->initiatorname, i_buf); 1830} 1831 1832static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, 1833 char *page) 1834{ 1835 struct se_session *sess = dev->reservation_holder; 1836 struct se_node_acl *se_nacl; 1837 ssize_t len; 1838 1839 if (sess) { 1840 se_nacl = sess->se_node_acl; 1841 len = sprintf(page, 1842 "SPC-2 Reservation: %s Initiator: %s\n", 1843 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1844 se_nacl->initiatorname); 1845 } else { 1846 len = sprintf(page, "No SPC-2 Reservation holder\n"); 1847 } 1848 return len; 1849} 1850 1851static ssize_t target_pr_res_holder_show(struct config_item *item, char *page) 1852{ 1853 struct se_device *dev = pr_to_dev(item); 1854 int ret; 1855 1856 if (!dev->dev_attrib.emulate_pr) 1857 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 1858 1859 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1860 return sprintf(page, "Passthrough\n"); 1861 1862 spin_lock(&dev->dev_reservation_lock); 1863 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1864 ret = target_core_dev_pr_show_spc2_res(dev, page); 1865 else 1866 ret = target_core_dev_pr_show_spc3_res(dev, page); 1867 spin_unlock(&dev->dev_reservation_lock); 1868 return ret; 1869} 1870 1871static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item, 1872 char *page) 1873{ 1874 struct se_device *dev = pr_to_dev(item); 1875 ssize_t len = 0; 1876 1877 spin_lock(&dev->dev_reservation_lock); 1878 if (!dev->dev_pr_res_holder) { 1879 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1880 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { 1881 len = sprintf(page, "SPC-3 Reservation: All Target" 1882 " Ports registration\n"); 1883 } else { 1884 len = sprintf(page, "SPC-3 Reservation: Single" 1885 " Target Port registration\n"); 1886 } 1887 1888 spin_unlock(&dev->dev_reservation_lock); 1889 return len; 1890} 1891 1892static ssize_t target_pr_res_pr_generation_show(struct config_item *item, 1893 char *page) 1894{ 1895 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation); 1896} 1897 1898 1899static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item, 1900 char *page) 1901{ 1902 struct se_device *dev = pr_to_dev(item); 1903 struct se_node_acl *se_nacl; 1904 struct se_portal_group *se_tpg; 1905 struct t10_pr_registration *pr_reg; 1906 const struct target_core_fabric_ops *tfo; 1907 ssize_t len = 0; 1908 1909 spin_lock(&dev->dev_reservation_lock); 1910 pr_reg = dev->dev_pr_res_holder; 1911 if (!pr_reg) { 1912 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1913 goto out_unlock; 1914 } 1915 1916 se_nacl = pr_reg->pr_reg_nacl; 1917 se_tpg = se_nacl->se_tpg; 1918 tfo = se_tpg->se_tpg_tfo; 1919 1920 len += sprintf(page+len, "SPC-3 Reservation: %s" 1921 " Target Node Endpoint: %s\n", tfo->fabric_name, 1922 tfo->tpg_get_wwn(se_tpg)); 1923 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1924 " Identifier Tag: %hu %s Portal Group Tag: %hu" 1925 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi, 1926 tfo->fabric_name, tfo->tpg_get_tag(se_tpg), 1927 tfo->fabric_name, pr_reg->pr_aptpl_target_lun); 1928 1929out_unlock: 1930 spin_unlock(&dev->dev_reservation_lock); 1931 return len; 1932} 1933 1934 1935static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item, 1936 char *page) 1937{ 1938 struct se_device *dev = pr_to_dev(item); 1939 const struct target_core_fabric_ops *tfo; 1940 struct t10_pr_registration *pr_reg; 1941 unsigned char buf[384]; 1942 char i_buf[PR_REG_ISID_ID_LEN]; 1943 ssize_t len = 0; 1944 int reg_count = 0; 1945 1946 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1947 1948 spin_lock(&dev->t10_pr.registration_lock); 1949 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1950 pr_reg_list) { 1951 1952 memset(buf, 0, 384); 1953 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1954 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1955 core_pr_dump_initiator_port(pr_reg, i_buf, 1956 PR_REG_ISID_ID_LEN); 1957 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1958 tfo->fabric_name, 1959 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, 1960 pr_reg->pr_res_generation); 1961 1962 if (len + strlen(buf) >= PAGE_SIZE) 1963 break; 1964 1965 len += sprintf(page+len, "%s", buf); 1966 reg_count++; 1967 } 1968 spin_unlock(&dev->t10_pr.registration_lock); 1969 1970 if (!reg_count) 1971 len += sprintf(page+len, "None\n"); 1972 1973 return len; 1974} 1975 1976static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page) 1977{ 1978 struct se_device *dev = pr_to_dev(item); 1979 struct t10_pr_registration *pr_reg; 1980 ssize_t len = 0; 1981 1982 spin_lock(&dev->dev_reservation_lock); 1983 pr_reg = dev->dev_pr_res_holder; 1984 if (pr_reg) { 1985 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1986 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 1987 } else { 1988 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1989 } 1990 1991 spin_unlock(&dev->dev_reservation_lock); 1992 return len; 1993} 1994 1995static ssize_t target_pr_res_type_show(struct config_item *item, char *page) 1996{ 1997 struct se_device *dev = pr_to_dev(item); 1998 1999 if (!dev->dev_attrib.emulate_pr) 2000 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 2001 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 2002 return sprintf(page, "SPC_PASSTHROUGH\n"); 2003 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 2004 return sprintf(page, "SPC2_RESERVATIONS\n"); 2005 2006 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 2007} 2008 2009static ssize_t target_pr_res_aptpl_active_show(struct config_item *item, 2010 char *page) 2011{ 2012 struct se_device *dev = pr_to_dev(item); 2013 2014 if (!dev->dev_attrib.emulate_pr || 2015 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 2016 return 0; 2017 2018 return sprintf(page, "APTPL Bit Status: %s\n", 2019 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 2020} 2021 2022static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item, 2023 char *page) 2024{ 2025 struct se_device *dev = pr_to_dev(item); 2026 2027 if (!dev->dev_attrib.emulate_pr || 2028 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 2029 return 0; 2030 2031 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 2032} 2033 2034enum { 2035 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 2036 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 2037 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 2038 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 2039}; 2040 2041static match_table_t tokens = { 2042 {Opt_initiator_fabric, "initiator_fabric=%s"}, 2043 {Opt_initiator_node, "initiator_node=%s"}, 2044 {Opt_initiator_sid, "initiator_sid=%s"}, 2045 {Opt_sa_res_key, "sa_res_key=%s"}, 2046 {Opt_res_holder, "res_holder=%d"}, 2047 {Opt_res_type, "res_type=%d"}, 2048 {Opt_res_scope, "res_scope=%d"}, 2049 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 2050 {Opt_mapped_lun, "mapped_lun=%u"}, 2051 {Opt_target_fabric, "target_fabric=%s"}, 2052 {Opt_target_node, "target_node=%s"}, 2053 {Opt_tpgt, "tpgt=%d"}, 2054 {Opt_port_rtpi, "port_rtpi=%d"}, 2055 {Opt_target_lun, "target_lun=%u"}, 2056 {Opt_err, NULL} 2057}; 2058 2059static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item, 2060 const char *page, size_t count) 2061{ 2062 struct se_device *dev = pr_to_dev(item); 2063 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 2064 unsigned char *t_fabric = NULL, *t_port = NULL; 2065 char *orig, *ptr, *opts; 2066 substring_t args[MAX_OPT_ARGS]; 2067 unsigned long long tmp_ll; 2068 u64 sa_res_key = 0; 2069 u64 mapped_lun = 0, target_lun = 0; 2070 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 2071 u16 tpgt = 0; 2072 u8 type = 0; 2073 2074 if (!dev->dev_attrib.emulate_pr || 2075 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 2076 return count; 2077 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 2078 return count; 2079 2080 if (dev->export_count) { 2081 pr_debug("Unable to process APTPL metadata while" 2082 " active fabric exports exist\n"); 2083 return -EINVAL; 2084 } 2085 2086 opts = kstrdup(page, GFP_KERNEL); 2087 if (!opts) 2088 return -ENOMEM; 2089 2090 orig = opts; 2091 while ((ptr = strsep(&opts, ",\n")) != NULL) { 2092 if (!*ptr) 2093 continue; 2094 2095 token = match_token(ptr, tokens, args); 2096 switch (token) { 2097 case Opt_initiator_fabric: 2098 i_fabric = match_strdup(args); 2099 if (!i_fabric) { 2100 ret = -ENOMEM; 2101 goto out; 2102 } 2103 break; 2104 case Opt_initiator_node: 2105 i_port = match_strdup(args); 2106 if (!i_port) { 2107 ret = -ENOMEM; 2108 goto out; 2109 } 2110 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 2111 pr_err("APTPL metadata initiator_node=" 2112 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 2113 PR_APTPL_MAX_IPORT_LEN); 2114 ret = -EINVAL; 2115 break; 2116 } 2117 break; 2118 case Opt_initiator_sid: 2119 isid = match_strdup(args); 2120 if (!isid) { 2121 ret = -ENOMEM; 2122 goto out; 2123 } 2124 if (strlen(isid) >= PR_REG_ISID_LEN) { 2125 pr_err("APTPL metadata initiator_isid" 2126 "= exceeds PR_REG_ISID_LEN: %d\n", 2127 PR_REG_ISID_LEN); 2128 ret = -EINVAL; 2129 break; 2130 } 2131 break; 2132 case Opt_sa_res_key: 2133 ret = match_u64(args, &tmp_ll); 2134 if (ret < 0) { 2135 pr_err("kstrtoull() failed for sa_res_key=\n"); 2136 goto out; 2137 } 2138 sa_res_key = (u64)tmp_ll; 2139 break; 2140 /* 2141 * PR APTPL Metadata for Reservation 2142 */ 2143 case Opt_res_holder: 2144 ret = match_int(args, &arg); 2145 if (ret) 2146 goto out; 2147 res_holder = arg; 2148 break; 2149 case Opt_res_type: 2150 ret = match_int(args, &arg); 2151 if (ret) 2152 goto out; 2153 type = (u8)arg; 2154 break; 2155 case Opt_res_scope: 2156 ret = match_int(args, &arg); 2157 if (ret) 2158 goto out; 2159 break; 2160 case Opt_res_all_tg_pt: 2161 ret = match_int(args, &arg); 2162 if (ret) 2163 goto out; 2164 all_tg_pt = (int)arg; 2165 break; 2166 case Opt_mapped_lun: 2167 ret = match_u64(args, &tmp_ll); 2168 if (ret) 2169 goto out; 2170 mapped_lun = (u64)tmp_ll; 2171 break; 2172 /* 2173 * PR APTPL Metadata for Target Port 2174 */ 2175 case Opt_target_fabric: 2176 t_fabric = match_strdup(args); 2177 if (!t_fabric) { 2178 ret = -ENOMEM; 2179 goto out; 2180 } 2181 break; 2182 case Opt_target_node: 2183 t_port = match_strdup(args); 2184 if (!t_port) { 2185 ret = -ENOMEM; 2186 goto out; 2187 } 2188 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 2189 pr_err("APTPL metadata target_node=" 2190 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 2191 PR_APTPL_MAX_TPORT_LEN); 2192 ret = -EINVAL; 2193 break; 2194 } 2195 break; 2196 case Opt_tpgt: 2197 ret = match_int(args, &arg); 2198 if (ret) 2199 goto out; 2200 tpgt = (u16)arg; 2201 break; 2202 case Opt_port_rtpi: 2203 ret = match_int(args, &arg); 2204 if (ret) 2205 goto out; 2206 break; 2207 case Opt_target_lun: 2208 ret = match_u64(args, &tmp_ll); 2209 if (ret) 2210 goto out; 2211 target_lun = (u64)tmp_ll; 2212 break; 2213 default: 2214 break; 2215 } 2216 } 2217 2218 if (!i_port || !t_port || !sa_res_key) { 2219 pr_err("Illegal parameters for APTPL registration\n"); 2220 ret = -EINVAL; 2221 goto out; 2222 } 2223 2224 if (res_holder && !(type)) { 2225 pr_err("Illegal PR type: 0x%02x for reservation" 2226 " holder\n", type); 2227 ret = -EINVAL; 2228 goto out; 2229 } 2230 2231 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, 2232 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 2233 res_holder, all_tg_pt, type); 2234out: 2235 kfree(i_fabric); 2236 kfree(i_port); 2237 kfree(isid); 2238 kfree(t_fabric); 2239 kfree(t_port); 2240 kfree(orig); 2241 return (ret == 0) ? count : ret; 2242} 2243 2244 2245CONFIGFS_ATTR_RO(target_pr_, res_holder); 2246CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts); 2247CONFIGFS_ATTR_RO(target_pr_, res_pr_generation); 2248CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port); 2249CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts); 2250CONFIGFS_ATTR_RO(target_pr_, res_pr_type); 2251CONFIGFS_ATTR_RO(target_pr_, res_type); 2252CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active); 2253CONFIGFS_ATTR(target_pr_, res_aptpl_metadata); 2254 2255static struct configfs_attribute *target_core_dev_pr_attrs[] = { 2256 &target_pr_attr_res_holder, 2257 &target_pr_attr_res_pr_all_tgt_pts, 2258 &target_pr_attr_res_pr_generation, 2259 &target_pr_attr_res_pr_holder_tg_port, 2260 &target_pr_attr_res_pr_registered_i_pts, 2261 &target_pr_attr_res_pr_type, 2262 &target_pr_attr_res_type, 2263 &target_pr_attr_res_aptpl_active, 2264 &target_pr_attr_res_aptpl_metadata, 2265 NULL, 2266}; 2267 2268TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs); 2269 2270/* End functions for struct config_item_type tb_dev_pr_cit */ 2271 2272/* Start functions for struct config_item_type tb_dev_cit */ 2273 2274static inline struct se_device *to_device(struct config_item *item) 2275{ 2276 return container_of(to_config_group(item), struct se_device, dev_group); 2277} 2278 2279static ssize_t target_dev_info_show(struct config_item *item, char *page) 2280{ 2281 struct se_device *dev = to_device(item); 2282 int bl = 0; 2283 ssize_t read_bytes = 0; 2284 2285 transport_dump_dev_state(dev, page, &bl); 2286 read_bytes += bl; 2287 read_bytes += dev->transport->show_configfs_dev_params(dev, 2288 page+read_bytes); 2289 return read_bytes; 2290} 2291 2292static ssize_t target_dev_control_store(struct config_item *item, 2293 const char *page, size_t count) 2294{ 2295 struct se_device *dev = to_device(item); 2296 2297 return dev->transport->set_configfs_dev_params(dev, page, count); 2298} 2299 2300static ssize_t target_dev_alias_show(struct config_item *item, char *page) 2301{ 2302 struct se_device *dev = to_device(item); 2303 2304 if (!(dev->dev_flags & DF_USING_ALIAS)) 2305 return 0; 2306 2307 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); 2308} 2309 2310static ssize_t target_dev_alias_store(struct config_item *item, 2311 const char *page, size_t count) 2312{ 2313 struct se_device *dev = to_device(item); 2314 struct se_hba *hba = dev->se_hba; 2315 ssize_t read_bytes; 2316 2317 if (count > (SE_DEV_ALIAS_LEN-1)) { 2318 pr_err("alias count: %d exceeds" 2319 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 2320 SE_DEV_ALIAS_LEN-1); 2321 return -EINVAL; 2322 } 2323 2324 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); 2325 if (!read_bytes) 2326 return -EINVAL; 2327 if (dev->dev_alias[read_bytes - 1] == '\n') 2328 dev->dev_alias[read_bytes - 1] = '\0'; 2329 2330 dev->dev_flags |= DF_USING_ALIAS; 2331 2332 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 2333 config_item_name(&hba->hba_group.cg_item), 2334 config_item_name(&dev->dev_group.cg_item), 2335 dev->dev_alias); 2336 2337 return read_bytes; 2338} 2339 2340static ssize_t target_dev_udev_path_show(struct config_item *item, char *page) 2341{ 2342 struct se_device *dev = to_device(item); 2343 2344 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) 2345 return 0; 2346 2347 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); 2348} 2349 2350static ssize_t target_dev_udev_path_store(struct config_item *item, 2351 const char *page, size_t count) 2352{ 2353 struct se_device *dev = to_device(item); 2354 struct se_hba *hba = dev->se_hba; 2355 ssize_t read_bytes; 2356 2357 if (count > (SE_UDEV_PATH_LEN-1)) { 2358 pr_err("udev_path count: %d exceeds" 2359 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 2360 SE_UDEV_PATH_LEN-1); 2361 return -EINVAL; 2362 } 2363 2364 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, 2365 "%s", page); 2366 if (!read_bytes) 2367 return -EINVAL; 2368 if (dev->udev_path[read_bytes - 1] == '\n') 2369 dev->udev_path[read_bytes - 1] = '\0'; 2370 2371 dev->dev_flags |= DF_USING_UDEV_PATH; 2372 2373 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 2374 config_item_name(&hba->hba_group.cg_item), 2375 config_item_name(&dev->dev_group.cg_item), 2376 dev->udev_path); 2377 2378 return read_bytes; 2379} 2380 2381static ssize_t target_dev_enable_show(struct config_item *item, char *page) 2382{ 2383 struct se_device *dev = to_device(item); 2384 2385 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev)); 2386} 2387 2388static ssize_t target_dev_enable_store(struct config_item *item, 2389 const char *page, size_t count) 2390{ 2391 struct se_device *dev = to_device(item); 2392 char *ptr; 2393 int ret; 2394 2395 ptr = strstr(page, "1"); 2396 if (!ptr) { 2397 pr_err("For dev_enable ops, only valid value" 2398 " is \"1\"\n"); 2399 return -EINVAL; 2400 } 2401 2402 ret = target_configure_device(dev); 2403 if (ret) 2404 return ret; 2405 return count; 2406} 2407 2408static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page) 2409{ 2410 struct se_device *dev = to_device(item); 2411 struct config_item *lu_ci; 2412 struct t10_alua_lu_gp *lu_gp; 2413 struct t10_alua_lu_gp_member *lu_gp_mem; 2414 ssize_t len = 0; 2415 2416 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2417 if (!lu_gp_mem) 2418 return 0; 2419 2420 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2421 lu_gp = lu_gp_mem->lu_gp; 2422 if (lu_gp) { 2423 lu_ci = &lu_gp->lu_gp_group.cg_item; 2424 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 2425 config_item_name(lu_ci), lu_gp->lu_gp_id); 2426 } 2427 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2428 2429 return len; 2430} 2431 2432static ssize_t target_dev_alua_lu_gp_store(struct config_item *item, 2433 const char *page, size_t count) 2434{ 2435 struct se_device *dev = to_device(item); 2436 struct se_hba *hba = dev->se_hba; 2437 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 2438 struct t10_alua_lu_gp_member *lu_gp_mem; 2439 unsigned char buf[LU_GROUP_NAME_BUF] = { }; 2440 int move = 0; 2441 2442 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2443 if (!lu_gp_mem) 2444 return count; 2445 2446 if (count > LU_GROUP_NAME_BUF) { 2447 pr_err("ALUA LU Group Alias too large!\n"); 2448 return -EINVAL; 2449 } 2450 memcpy(buf, page, count); 2451 /* 2452 * Any ALUA logical unit alias besides "NULL" means we will be 2453 * making a new group association. 2454 */ 2455 if (strcmp(strstrip(buf), "NULL")) { 2456 /* 2457 * core_alua_get_lu_gp_by_name() will increment reference to 2458 * struct t10_alua_lu_gp. This reference is released with 2459 * core_alua_get_lu_gp_by_name below(). 2460 */ 2461 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 2462 if (!lu_gp_new) 2463 return -ENODEV; 2464 } 2465 2466 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2467 lu_gp = lu_gp_mem->lu_gp; 2468 if (lu_gp) { 2469 /* 2470 * Clearing an existing lu_gp association, and replacing 2471 * with NULL 2472 */ 2473 if (!lu_gp_new) { 2474 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 2475 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 2476 " %hu\n", 2477 config_item_name(&hba->hba_group.cg_item), 2478 config_item_name(&dev->dev_group.cg_item), 2479 config_item_name(&lu_gp->lu_gp_group.cg_item), 2480 lu_gp->lu_gp_id); 2481 2482 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2483 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2484 2485 return count; 2486 } 2487 /* 2488 * Removing existing association of lu_gp_mem with lu_gp 2489 */ 2490 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2491 move = 1; 2492 } 2493 /* 2494 * Associate lu_gp_mem with lu_gp_new. 2495 */ 2496 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 2497 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2498 2499 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 2500 " core/alua/lu_gps/%s, ID: %hu\n", 2501 (move) ? "Moving" : "Adding", 2502 config_item_name(&hba->hba_group.cg_item), 2503 config_item_name(&dev->dev_group.cg_item), 2504 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 2505 lu_gp_new->lu_gp_id); 2506 2507 core_alua_put_lu_gp_from_name(lu_gp_new); 2508 return count; 2509} 2510 2511static ssize_t target_dev_lba_map_show(struct config_item *item, char *page) 2512{ 2513 struct se_device *dev = to_device(item); 2514 struct t10_alua_lba_map *map; 2515 struct t10_alua_lba_map_member *mem; 2516 char *b = page; 2517 int bl = 0; 2518 char state; 2519 2520 spin_lock(&dev->t10_alua.lba_map_lock); 2521 if (!list_empty(&dev->t10_alua.lba_map_list)) 2522 bl += sprintf(b + bl, "%u %u\n", 2523 dev->t10_alua.lba_map_segment_size, 2524 dev->t10_alua.lba_map_segment_multiplier); 2525 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) { 2526 bl += sprintf(b + bl, "%llu %llu", 2527 map->lba_map_first_lba, map->lba_map_last_lba); 2528 list_for_each_entry(mem, &map->lba_map_mem_list, 2529 lba_map_mem_list) { 2530 switch (mem->lba_map_mem_alua_state) { 2531 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: 2532 state = 'O'; 2533 break; 2534 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: 2535 state = 'A'; 2536 break; 2537 case ALUA_ACCESS_STATE_STANDBY: 2538 state = 'S'; 2539 break; 2540 case ALUA_ACCESS_STATE_UNAVAILABLE: 2541 state = 'U'; 2542 break; 2543 default: 2544 state = '.'; 2545 break; 2546 } 2547 bl += sprintf(b + bl, " %d:%c", 2548 mem->lba_map_mem_alua_pg_id, state); 2549 } 2550 bl += sprintf(b + bl, "\n"); 2551 } 2552 spin_unlock(&dev->t10_alua.lba_map_lock); 2553 return bl; 2554} 2555 2556static ssize_t target_dev_lba_map_store(struct config_item *item, 2557 const char *page, size_t count) 2558{ 2559 struct se_device *dev = to_device(item); 2560 struct t10_alua_lba_map *lba_map = NULL; 2561 struct list_head lba_list; 2562 char *map_entries, *orig, *ptr; 2563 char state; 2564 int pg_num = -1, pg; 2565 int ret = 0, num = 0, pg_id, alua_state; 2566 unsigned long start_lba = -1, end_lba = -1; 2567 unsigned long segment_size = -1, segment_mult = -1; 2568 2569 orig = map_entries = kstrdup(page, GFP_KERNEL); 2570 if (!map_entries) 2571 return -ENOMEM; 2572 2573 INIT_LIST_HEAD(&lba_list); 2574 while ((ptr = strsep(&map_entries, "\n")) != NULL) { 2575 if (!*ptr) 2576 continue; 2577 2578 if (num == 0) { 2579 if (sscanf(ptr, "%lu %lu\n", 2580 &segment_size, &segment_mult) != 2) { 2581 pr_err("Invalid line %d\n", num); 2582 ret = -EINVAL; 2583 break; 2584 } 2585 num++; 2586 continue; 2587 } 2588 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) { 2589 pr_err("Invalid line %d\n", num); 2590 ret = -EINVAL; 2591 break; 2592 } 2593 ptr = strchr(ptr, ' '); 2594 if (!ptr) { 2595 pr_err("Invalid line %d, missing end lba\n", num); 2596 ret = -EINVAL; 2597 break; 2598 } 2599 ptr++; 2600 ptr = strchr(ptr, ' '); 2601 if (!ptr) { 2602 pr_err("Invalid line %d, missing state definitions\n", 2603 num); 2604 ret = -EINVAL; 2605 break; 2606 } 2607 ptr++; 2608 lba_map = core_alua_allocate_lba_map(&lba_list, 2609 start_lba, end_lba); 2610 if (IS_ERR(lba_map)) { 2611 ret = PTR_ERR(lba_map); 2612 break; 2613 } 2614 pg = 0; 2615 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) { 2616 switch (state) { 2617 case 'O': 2618 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED; 2619 break; 2620 case 'A': 2621 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED; 2622 break; 2623 case 'S': 2624 alua_state = ALUA_ACCESS_STATE_STANDBY; 2625 break; 2626 case 'U': 2627 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE; 2628 break; 2629 default: 2630 pr_err("Invalid ALUA state '%c'\n", state); 2631 ret = -EINVAL; 2632 goto out; 2633 } 2634 2635 ret = core_alua_allocate_lba_map_mem(lba_map, 2636 pg_id, alua_state); 2637 if (ret) { 2638 pr_err("Invalid target descriptor %d:%c " 2639 "at line %d\n", 2640 pg_id, state, num); 2641 break; 2642 } 2643 pg++; 2644 ptr = strchr(ptr, ' '); 2645 if (ptr) 2646 ptr++; 2647 else 2648 break; 2649 } 2650 if (pg_num == -1) 2651 pg_num = pg; 2652 else if (pg != pg_num) { 2653 pr_err("Only %d from %d port groups definitions " 2654 "at line %d\n", pg, pg_num, num); 2655 ret = -EINVAL; 2656 break; 2657 } 2658 num++; 2659 } 2660out: 2661 if (ret) { 2662 core_alua_free_lba_map(&lba_list); 2663 count = ret; 2664 } else 2665 core_alua_set_lba_map(dev, &lba_list, 2666 segment_size, segment_mult); 2667 kfree(orig); 2668 return count; 2669} 2670 2671CONFIGFS_ATTR_RO(target_dev_, info); 2672CONFIGFS_ATTR_WO(target_dev_, control); 2673CONFIGFS_ATTR(target_dev_, alias); 2674CONFIGFS_ATTR(target_dev_, udev_path); 2675CONFIGFS_ATTR(target_dev_, enable); 2676CONFIGFS_ATTR(target_dev_, alua_lu_gp); 2677CONFIGFS_ATTR(target_dev_, lba_map); 2678 2679static struct configfs_attribute *target_core_dev_attrs[] = { 2680 &target_dev_attr_info, 2681 &target_dev_attr_control, 2682 &target_dev_attr_alias, 2683 &target_dev_attr_udev_path, 2684 &target_dev_attr_enable, 2685 &target_dev_attr_alua_lu_gp, 2686 &target_dev_attr_lba_map, 2687 NULL, 2688}; 2689 2690static void target_core_dev_release(struct config_item *item) 2691{ 2692 struct config_group *dev_cg = to_config_group(item); 2693 struct se_device *dev = 2694 container_of(dev_cg, struct se_device, dev_group); 2695 2696 target_free_device(dev); 2697} 2698 2699/* 2700 * Used in target_core_fabric_configfs.c to verify valid se_device symlink 2701 * within target_fabric_port_link() 2702 */ 2703struct configfs_item_operations target_core_dev_item_ops = { 2704 .release = target_core_dev_release, 2705}; 2706 2707TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs); 2708 2709/* End functions for struct config_item_type tb_dev_cit */ 2710 2711/* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 2712 2713static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item) 2714{ 2715 return container_of(to_config_group(item), struct t10_alua_lu_gp, 2716 lu_gp_group); 2717} 2718 2719static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page) 2720{ 2721 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2722 2723 if (!lu_gp->lu_gp_valid_id) 2724 return 0; 2725 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2726} 2727 2728static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item, 2729 const char *page, size_t count) 2730{ 2731 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2732 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2733 unsigned long lu_gp_id; 2734 int ret; 2735 2736 ret = kstrtoul(page, 0, &lu_gp_id); 2737 if (ret < 0) { 2738 pr_err("kstrtoul() returned %d for" 2739 " lu_gp_id\n", ret); 2740 return ret; 2741 } 2742 if (lu_gp_id > 0x0000ffff) { 2743 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 2744 " 0x0000ffff\n", lu_gp_id); 2745 return -EINVAL; 2746 } 2747 2748 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2749 if (ret < 0) 2750 return -EINVAL; 2751 2752 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 2753 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2754 config_item_name(&alua_lu_gp_cg->cg_item), 2755 lu_gp->lu_gp_id); 2756 2757 return count; 2758} 2759 2760static ssize_t target_lu_gp_members_show(struct config_item *item, char *page) 2761{ 2762 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2763 struct se_device *dev; 2764 struct se_hba *hba; 2765 struct t10_alua_lu_gp_member *lu_gp_mem; 2766 ssize_t len = 0, cur_len; 2767 unsigned char buf[LU_GROUP_NAME_BUF] = { }; 2768 2769 spin_lock(&lu_gp->lu_gp_lock); 2770 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2771 dev = lu_gp_mem->lu_gp_mem_dev; 2772 hba = dev->se_hba; 2773 2774 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 2775 config_item_name(&hba->hba_group.cg_item), 2776 config_item_name(&dev->dev_group.cg_item)); 2777 cur_len++; /* Extra byte for NULL terminator */ 2778 2779 if ((cur_len + len) > PAGE_SIZE) { 2780 pr_warn("Ran out of lu_gp_show_attr" 2781 "_members buffer\n"); 2782 break; 2783 } 2784 memcpy(page+len, buf, cur_len); 2785 len += cur_len; 2786 } 2787 spin_unlock(&lu_gp->lu_gp_lock); 2788 2789 return len; 2790} 2791 2792CONFIGFS_ATTR(target_lu_gp_, lu_gp_id); 2793CONFIGFS_ATTR_RO(target_lu_gp_, members); 2794 2795static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2796 &target_lu_gp_attr_lu_gp_id, 2797 &target_lu_gp_attr_members, 2798 NULL, 2799}; 2800 2801static void target_core_alua_lu_gp_release(struct config_item *item) 2802{ 2803 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2804 struct t10_alua_lu_gp, lu_gp_group); 2805 2806 core_alua_free_lu_gp(lu_gp); 2807} 2808 2809static struct configfs_item_operations target_core_alua_lu_gp_ops = { 2810 .release = target_core_alua_lu_gp_release, 2811}; 2812 2813static const struct config_item_type target_core_alua_lu_gp_cit = { 2814 .ct_item_ops = &target_core_alua_lu_gp_ops, 2815 .ct_attrs = target_core_alua_lu_gp_attrs, 2816 .ct_owner = THIS_MODULE, 2817}; 2818 2819/* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2820 2821/* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2822 2823static struct config_group *target_core_alua_create_lu_gp( 2824 struct config_group *group, 2825 const char *name) 2826{ 2827 struct t10_alua_lu_gp *lu_gp; 2828 struct config_group *alua_lu_gp_cg = NULL; 2829 struct config_item *alua_lu_gp_ci = NULL; 2830 2831 lu_gp = core_alua_allocate_lu_gp(name, 0); 2832 if (IS_ERR(lu_gp)) 2833 return NULL; 2834 2835 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2836 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2837 2838 config_group_init_type_name(alua_lu_gp_cg, name, 2839 &target_core_alua_lu_gp_cit); 2840 2841 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2842 " Group: core/alua/lu_gps/%s\n", 2843 config_item_name(alua_lu_gp_ci)); 2844 2845 return alua_lu_gp_cg; 2846 2847} 2848 2849static void target_core_alua_drop_lu_gp( 2850 struct config_group *group, 2851 struct config_item *item) 2852{ 2853 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2854 struct t10_alua_lu_gp, lu_gp_group); 2855 2856 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2857 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2858 config_item_name(item), lu_gp->lu_gp_id); 2859 /* 2860 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 2861 * -> target_core_alua_lu_gp_release() 2862 */ 2863 config_item_put(item); 2864} 2865 2866static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2867 .make_group = &target_core_alua_create_lu_gp, 2868 .drop_item = &target_core_alua_drop_lu_gp, 2869}; 2870 2871static const struct config_item_type target_core_alua_lu_gps_cit = { 2872 .ct_item_ops = NULL, 2873 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2874 .ct_owner = THIS_MODULE, 2875}; 2876 2877/* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2878 2879/* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2880 2881static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item) 2882{ 2883 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp, 2884 tg_pt_gp_group); 2885} 2886 2887static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item, 2888 char *page) 2889{ 2890 return sprintf(page, "%d\n", 2891 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state); 2892} 2893 2894static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item, 2895 const char *page, size_t count) 2896{ 2897 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2898 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; 2899 unsigned long tmp; 2900 int new_state, ret; 2901 2902 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2903 pr_err("Unable to do implicit ALUA on invalid tg_pt_gp ID\n"); 2904 return -EINVAL; 2905 } 2906 if (!target_dev_configured(dev)) { 2907 pr_err("Unable to set alua_access_state while device is" 2908 " not configured\n"); 2909 return -ENODEV; 2910 } 2911 2912 ret = kstrtoul(page, 0, &tmp); 2913 if (ret < 0) { 2914 pr_err("Unable to extract new ALUA access state from" 2915 " %s\n", page); 2916 return ret; 2917 } 2918 new_state = (int)tmp; 2919 2920 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) { 2921 pr_err("Unable to process implicit configfs ALUA" 2922 " transition while TPGS_IMPLICIT_ALUA is disabled\n"); 2923 return -EINVAL; 2924 } 2925 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA && 2926 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) { 2927 /* LBA DEPENDENT is only allowed with implicit ALUA */ 2928 pr_err("Unable to process implicit configfs ALUA transition" 2929 " while explicit ALUA management is enabled\n"); 2930 return -EINVAL; 2931 } 2932 2933 ret = core_alua_do_port_transition(tg_pt_gp, dev, 2934 NULL, NULL, new_state, 0); 2935 return (!ret) ? count : -EINVAL; 2936} 2937 2938static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item, 2939 char *page) 2940{ 2941 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2942 return sprintf(page, "%s\n", 2943 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2944} 2945 2946static ssize_t target_tg_pt_gp_alua_access_status_store( 2947 struct config_item *item, const char *page, size_t count) 2948{ 2949 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2950 unsigned long tmp; 2951 int new_status, ret; 2952 2953 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2954 pr_err("Unable to set ALUA access status on invalid tg_pt_gp ID\n"); 2955 return -EINVAL; 2956 } 2957 2958 ret = kstrtoul(page, 0, &tmp); 2959 if (ret < 0) { 2960 pr_err("Unable to extract new ALUA access status" 2961 " from %s\n", page); 2962 return ret; 2963 } 2964 new_status = (int)tmp; 2965 2966 if ((new_status != ALUA_STATUS_NONE) && 2967 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && 2968 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { 2969 pr_err("Illegal ALUA access status: 0x%02x\n", 2970 new_status); 2971 return -EINVAL; 2972 } 2973 2974 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2975 return count; 2976} 2977 2978static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item, 2979 char *page) 2980{ 2981 return core_alua_show_access_type(to_tg_pt_gp(item), page); 2982} 2983 2984static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item, 2985 const char *page, size_t count) 2986{ 2987 return core_alua_store_access_type(to_tg_pt_gp(item), page, count); 2988} 2989 2990#define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \ 2991static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \ 2992 struct config_item *item, char *p) \ 2993{ \ 2994 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 2995 return sprintf(p, "%d\n", \ 2996 !!(t->tg_pt_gp_alua_supported_states & _bit)); \ 2997} \ 2998 \ 2999static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \ 3000 struct config_item *item, const char *p, size_t c) \ 3001{ \ 3002 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 3003 unsigned long tmp; \ 3004 int ret; \ 3005 \ 3006 if (!t->tg_pt_gp_valid_id) { \ 3007 pr_err("Unable to set " #_name " ALUA state on invalid tg_pt_gp ID\n"); \ 3008 return -EINVAL; \ 3009 } \ 3010 \ 3011 ret = kstrtoul(p, 0, &tmp); \ 3012 if (ret < 0) { \ 3013 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \ 3014 return -EINVAL; \ 3015 } \ 3016 if (tmp > 1) { \ 3017 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \ 3018 return -EINVAL; \ 3019 } \ 3020 if (tmp) \ 3021 t->tg_pt_gp_alua_supported_states |= _bit; \ 3022 else \ 3023 t->tg_pt_gp_alua_supported_states &= ~_bit; \ 3024 \ 3025 return c; \ 3026} 3027 3028ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP); 3029ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP); 3030ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP); 3031ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP); 3032ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP); 3033ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP); 3034ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP); 3035 3036static ssize_t target_tg_pt_gp_alua_write_metadata_show( 3037 struct config_item *item, char *page) 3038{ 3039 return sprintf(page, "%d\n", 3040 to_tg_pt_gp(item)->tg_pt_gp_write_metadata); 3041} 3042 3043static ssize_t target_tg_pt_gp_alua_write_metadata_store( 3044 struct config_item *item, const char *page, size_t count) 3045{ 3046 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3047 unsigned long tmp; 3048 int ret; 3049 3050 ret = kstrtoul(page, 0, &tmp); 3051 if (ret < 0) { 3052 pr_err("Unable to extract alua_write_metadata\n"); 3053 return ret; 3054 } 3055 3056 if ((tmp != 0) && (tmp != 1)) { 3057 pr_err("Illegal value for alua_write_metadata:" 3058 " %lu\n", tmp); 3059 return -EINVAL; 3060 } 3061 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 3062 3063 return count; 3064} 3065 3066static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item, 3067 char *page) 3068{ 3069 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page); 3070} 3071 3072static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item, 3073 const char *page, size_t count) 3074{ 3075 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page, 3076 count); 3077} 3078 3079static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item, 3080 char *page) 3081{ 3082 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page); 3083} 3084 3085static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item, 3086 const char *page, size_t count) 3087{ 3088 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page, 3089 count); 3090} 3091 3092static ssize_t target_tg_pt_gp_implicit_trans_secs_show( 3093 struct config_item *item, char *page) 3094{ 3095 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page); 3096} 3097 3098static ssize_t target_tg_pt_gp_implicit_trans_secs_store( 3099 struct config_item *item, const char *page, size_t count) 3100{ 3101 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page, 3102 count); 3103} 3104 3105static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item, 3106 char *page) 3107{ 3108 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page); 3109} 3110 3111static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item, 3112 const char *page, size_t count) 3113{ 3114 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count); 3115} 3116 3117static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item, 3118 char *page) 3119{ 3120 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3121 3122 if (!tg_pt_gp->tg_pt_gp_valid_id) 3123 return 0; 3124 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 3125} 3126 3127static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item, 3128 const char *page, size_t count) 3129{ 3130 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3131 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 3132 unsigned long tg_pt_gp_id; 3133 int ret; 3134 3135 ret = kstrtoul(page, 0, &tg_pt_gp_id); 3136 if (ret < 0) { 3137 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n", 3138 page); 3139 return ret; 3140 } 3141 if (tg_pt_gp_id > 0x0000ffff) { 3142 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n", 3143 tg_pt_gp_id); 3144 return -EINVAL; 3145 } 3146 3147 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 3148 if (ret < 0) 3149 return -EINVAL; 3150 3151 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 3152 "core/alua/tg_pt_gps/%s to ID: %hu\n", 3153 config_item_name(&alua_tg_pt_gp_cg->cg_item), 3154 tg_pt_gp->tg_pt_gp_id); 3155 3156 return count; 3157} 3158 3159static ssize_t target_tg_pt_gp_members_show(struct config_item *item, 3160 char *page) 3161{ 3162 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3163 struct se_lun *lun; 3164 ssize_t len = 0, cur_len; 3165 unsigned char buf[TG_PT_GROUP_NAME_BUF] = { }; 3166 3167 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 3168 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, 3169 lun_tg_pt_gp_link) { 3170 struct se_portal_group *tpg = lun->lun_tpg; 3171 3172 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 3173 "/%s\n", tpg->se_tpg_tfo->fabric_name, 3174 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 3175 tpg->se_tpg_tfo->tpg_get_tag(tpg), 3176 config_item_name(&lun->lun_group.cg_item)); 3177 cur_len++; /* Extra byte for NULL terminator */ 3178 3179 if ((cur_len + len) > PAGE_SIZE) { 3180 pr_warn("Ran out of lu_gp_show_attr" 3181 "_members buffer\n"); 3182 break; 3183 } 3184 memcpy(page+len, buf, cur_len); 3185 len += cur_len; 3186 } 3187 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 3188 3189 return len; 3190} 3191 3192CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state); 3193CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status); 3194CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type); 3195CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning); 3196CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline); 3197CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent); 3198CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable); 3199CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby); 3200CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized); 3201CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized); 3202CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata); 3203CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs); 3204CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs); 3205CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs); 3206CONFIGFS_ATTR(target_tg_pt_gp_, preferred); 3207CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id); 3208CONFIGFS_ATTR_RO(target_tg_pt_gp_, members); 3209 3210static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 3211 &target_tg_pt_gp_attr_alua_access_state, 3212 &target_tg_pt_gp_attr_alua_access_status, 3213 &target_tg_pt_gp_attr_alua_access_type, 3214 &target_tg_pt_gp_attr_alua_support_transitioning, 3215 &target_tg_pt_gp_attr_alua_support_offline, 3216 &target_tg_pt_gp_attr_alua_support_lba_dependent, 3217 &target_tg_pt_gp_attr_alua_support_unavailable, 3218 &target_tg_pt_gp_attr_alua_support_standby, 3219 &target_tg_pt_gp_attr_alua_support_active_nonoptimized, 3220 &target_tg_pt_gp_attr_alua_support_active_optimized, 3221 &target_tg_pt_gp_attr_alua_write_metadata, 3222 &target_tg_pt_gp_attr_nonop_delay_msecs, 3223 &target_tg_pt_gp_attr_trans_delay_msecs, 3224 &target_tg_pt_gp_attr_implicit_trans_secs, 3225 &target_tg_pt_gp_attr_preferred, 3226 &target_tg_pt_gp_attr_tg_pt_gp_id, 3227 &target_tg_pt_gp_attr_members, 3228 NULL, 3229}; 3230 3231static void target_core_alua_tg_pt_gp_release(struct config_item *item) 3232{ 3233 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3234 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3235 3236 core_alua_free_tg_pt_gp(tg_pt_gp); 3237} 3238 3239static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 3240 .release = target_core_alua_tg_pt_gp_release, 3241}; 3242 3243static const struct config_item_type target_core_alua_tg_pt_gp_cit = { 3244 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 3245 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 3246 .ct_owner = THIS_MODULE, 3247}; 3248 3249/* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 3250 3251/* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3252 3253static struct config_group *target_core_alua_create_tg_pt_gp( 3254 struct config_group *group, 3255 const char *name) 3256{ 3257 struct t10_alua *alua = container_of(group, struct t10_alua, 3258 alua_tg_pt_gps_group); 3259 struct t10_alua_tg_pt_gp *tg_pt_gp; 3260 struct config_group *alua_tg_pt_gp_cg = NULL; 3261 struct config_item *alua_tg_pt_gp_ci = NULL; 3262 3263 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0); 3264 if (!tg_pt_gp) 3265 return NULL; 3266 3267 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 3268 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 3269 3270 config_group_init_type_name(alua_tg_pt_gp_cg, name, 3271 &target_core_alua_tg_pt_gp_cit); 3272 3273 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 3274 " Group: alua/tg_pt_gps/%s\n", 3275 config_item_name(alua_tg_pt_gp_ci)); 3276 3277 return alua_tg_pt_gp_cg; 3278} 3279 3280static void target_core_alua_drop_tg_pt_gp( 3281 struct config_group *group, 3282 struct config_item *item) 3283{ 3284 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3285 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3286 3287 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 3288 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 3289 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 3290 /* 3291 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 3292 * -> target_core_alua_tg_pt_gp_release(). 3293 */ 3294 config_item_put(item); 3295} 3296 3297static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 3298 .make_group = &target_core_alua_create_tg_pt_gp, 3299 .drop_item = &target_core_alua_drop_tg_pt_gp, 3300}; 3301 3302TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL); 3303 3304/* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3305 3306/* Start functions for struct config_item_type target_core_alua_cit */ 3307 3308/* 3309 * target_core_alua_cit is a ConfigFS group that lives under 3310 * /sys/kernel/config/target/core/alua. There are default groups 3311 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 3312 * target_core_alua_cit in target_core_init_configfs() below. 3313 */ 3314static const struct config_item_type target_core_alua_cit = { 3315 .ct_item_ops = NULL, 3316 .ct_attrs = NULL, 3317 .ct_owner = THIS_MODULE, 3318}; 3319 3320/* End functions for struct config_item_type target_core_alua_cit */ 3321 3322/* Start functions for struct config_item_type tb_dev_stat_cit */ 3323 3324static struct config_group *target_core_stat_mkdir( 3325 struct config_group *group, 3326 const char *name) 3327{ 3328 return ERR_PTR(-ENOSYS); 3329} 3330 3331static void target_core_stat_rmdir( 3332 struct config_group *group, 3333 struct config_item *item) 3334{ 3335 return; 3336} 3337 3338static struct configfs_group_operations target_core_stat_group_ops = { 3339 .make_group = &target_core_stat_mkdir, 3340 .drop_item = &target_core_stat_rmdir, 3341}; 3342 3343TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL); 3344 3345/* End functions for struct config_item_type tb_dev_stat_cit */ 3346 3347/* Start functions for struct config_item_type target_core_hba_cit */ 3348 3349static struct config_group *target_core_make_subdev( 3350 struct config_group *group, 3351 const char *name) 3352{ 3353 struct t10_alua_tg_pt_gp *tg_pt_gp; 3354 struct config_item *hba_ci = &group->cg_item; 3355 struct se_hba *hba = item_to_hba(hba_ci); 3356 struct target_backend *tb = hba->backend; 3357 struct se_device *dev; 3358 int errno = -ENOMEM, ret; 3359 3360 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 3361 if (ret) 3362 return ERR_PTR(ret); 3363 3364 dev = target_alloc_device(hba, name); 3365 if (!dev) 3366 goto out_unlock; 3367 3368 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit); 3369 3370 config_group_init_type_name(&dev->dev_action_group, "action", 3371 &tb->tb_dev_action_cit); 3372 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group); 3373 3374 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib", 3375 &tb->tb_dev_attrib_cit); 3376 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group); 3377 3378 config_group_init_type_name(&dev->dev_pr_group, "pr", 3379 &tb->tb_dev_pr_cit); 3380 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group); 3381 3382 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn", 3383 &tb->tb_dev_wwn_cit); 3384 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group, 3385 &dev->dev_group); 3386 3387 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group, 3388 "alua", &tb->tb_dev_alua_tg_pt_gps_cit); 3389 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group, 3390 &dev->dev_group); 3391 3392 config_group_init_type_name(&dev->dev_stat_grps.stat_group, 3393 "statistics", &tb->tb_dev_stat_cit); 3394 configfs_add_default_group(&dev->dev_stat_grps.stat_group, 3395 &dev->dev_group); 3396 3397 /* 3398 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 3399 */ 3400 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1); 3401 if (!tg_pt_gp) 3402 goto out_free_device; 3403 dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 3404 3405 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 3406 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 3407 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group, 3408 &dev->t10_alua.alua_tg_pt_gps_group); 3409 3410 /* 3411 * Add core/$HBA/$DEV/statistics/ default groups 3412 */ 3413 target_stat_setup_dev_default_groups(dev); 3414 3415 mutex_lock(&target_devices_lock); 3416 target_devices++; 3417 mutex_unlock(&target_devices_lock); 3418 3419 mutex_unlock(&hba->hba_access_mutex); 3420 return &dev->dev_group; 3421 3422out_free_device: 3423 target_free_device(dev); 3424out_unlock: 3425 mutex_unlock(&hba->hba_access_mutex); 3426 return ERR_PTR(errno); 3427} 3428 3429static void target_core_drop_subdev( 3430 struct config_group *group, 3431 struct config_item *item) 3432{ 3433 struct config_group *dev_cg = to_config_group(item); 3434 struct se_device *dev = 3435 container_of(dev_cg, struct se_device, dev_group); 3436 struct se_hba *hba; 3437 3438 hba = item_to_hba(&dev->se_hba->hba_group.cg_item); 3439 3440 mutex_lock(&hba->hba_access_mutex); 3441 3442 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group); 3443 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group); 3444 3445 /* 3446 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 3447 * directly from target_core_alua_tg_pt_gp_release(). 3448 */ 3449 dev->t10_alua.default_tg_pt_gp = NULL; 3450 3451 configfs_remove_default_groups(dev_cg); 3452 3453 /* 3454 * se_dev is released from target_core_dev_item_ops->release() 3455 */ 3456 config_item_put(item); 3457 3458 mutex_lock(&target_devices_lock); 3459 target_devices--; 3460 mutex_unlock(&target_devices_lock); 3461 3462 mutex_unlock(&hba->hba_access_mutex); 3463} 3464 3465static struct configfs_group_operations target_core_hba_group_ops = { 3466 .make_group = target_core_make_subdev, 3467 .drop_item = target_core_drop_subdev, 3468}; 3469 3470 3471static inline struct se_hba *to_hba(struct config_item *item) 3472{ 3473 return container_of(to_config_group(item), struct se_hba, hba_group); 3474} 3475 3476static ssize_t target_hba_info_show(struct config_item *item, char *page) 3477{ 3478 struct se_hba *hba = to_hba(item); 3479 3480 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 3481 hba->hba_id, hba->backend->ops->name, 3482 TARGET_CORE_VERSION); 3483} 3484 3485static ssize_t target_hba_mode_show(struct config_item *item, char *page) 3486{ 3487 struct se_hba *hba = to_hba(item); 3488 int hba_mode = 0; 3489 3490 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 3491 hba_mode = 1; 3492 3493 return sprintf(page, "%d\n", hba_mode); 3494} 3495 3496static ssize_t target_hba_mode_store(struct config_item *item, 3497 const char *page, size_t count) 3498{ 3499 struct se_hba *hba = to_hba(item); 3500 unsigned long mode_flag; 3501 int ret; 3502 3503 if (hba->backend->ops->pmode_enable_hba == NULL) 3504 return -EINVAL; 3505 3506 ret = kstrtoul(page, 0, &mode_flag); 3507 if (ret < 0) { 3508 pr_err("Unable to extract hba mode flag: %d\n", ret); 3509 return ret; 3510 } 3511 3512 if (hba->dev_count) { 3513 pr_err("Unable to set hba_mode with active devices\n"); 3514 return -EINVAL; 3515 } 3516 3517 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag); 3518 if (ret < 0) 3519 return -EINVAL; 3520 if (ret > 0) 3521 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 3522 else if (ret == 0) 3523 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 3524 3525 return count; 3526} 3527 3528CONFIGFS_ATTR_RO(target_, hba_info); 3529CONFIGFS_ATTR(target_, hba_mode); 3530 3531static void target_core_hba_release(struct config_item *item) 3532{ 3533 struct se_hba *hba = container_of(to_config_group(item), 3534 struct se_hba, hba_group); 3535 core_delete_hba(hba); 3536} 3537 3538static struct configfs_attribute *target_core_hba_attrs[] = { 3539 &target_attr_hba_info, 3540 &target_attr_hba_mode, 3541 NULL, 3542}; 3543 3544static struct configfs_item_operations target_core_hba_item_ops = { 3545 .release = target_core_hba_release, 3546}; 3547 3548static const struct config_item_type target_core_hba_cit = { 3549 .ct_item_ops = &target_core_hba_item_ops, 3550 .ct_group_ops = &target_core_hba_group_ops, 3551 .ct_attrs = target_core_hba_attrs, 3552 .ct_owner = THIS_MODULE, 3553}; 3554 3555static struct config_group *target_core_call_addhbatotarget( 3556 struct config_group *group, 3557 const char *name) 3558{ 3559 char *se_plugin_str, *str, *str2; 3560 struct se_hba *hba; 3561 char buf[TARGET_CORE_NAME_MAX_LEN] = { }; 3562 unsigned long plugin_dep_id = 0; 3563 int ret; 3564 3565 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 3566 pr_err("Passed *name strlen(): %d exceeds" 3567 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 3568 TARGET_CORE_NAME_MAX_LEN); 3569 return ERR_PTR(-ENAMETOOLONG); 3570 } 3571 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 3572 3573 str = strstr(buf, "_"); 3574 if (!str) { 3575 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 3576 return ERR_PTR(-EINVAL); 3577 } 3578 se_plugin_str = buf; 3579 /* 3580 * Special case for subsystem plugins that have "_" in their names. 3581 * Namely rd_direct and rd_mcp.. 3582 */ 3583 str2 = strstr(str+1, "_"); 3584 if (str2) { 3585 *str2 = '\0'; /* Terminate for *se_plugin_str */ 3586 str2++; /* Skip to start of plugin dependent ID */ 3587 str = str2; 3588 } else { 3589 *str = '\0'; /* Terminate for *se_plugin_str */ 3590 str++; /* Skip to start of plugin dependent ID */ 3591 } 3592 3593 ret = kstrtoul(str, 0, &plugin_dep_id); 3594 if (ret < 0) { 3595 pr_err("kstrtoul() returned %d for" 3596 " plugin_dep_id\n", ret); 3597 return ERR_PTR(ret); 3598 } 3599 /* 3600 * Load up TCM subsystem plugins if they have not already been loaded. 3601 */ 3602 transport_subsystem_check_init(); 3603 3604 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 3605 if (IS_ERR(hba)) 3606 return ERR_CAST(hba); 3607 3608 config_group_init_type_name(&hba->hba_group, name, 3609 &target_core_hba_cit); 3610 3611 return &hba->hba_group; 3612} 3613 3614static void target_core_call_delhbafromtarget( 3615 struct config_group *group, 3616 struct config_item *item) 3617{ 3618 /* 3619 * core_delete_hba() is called from target_core_hba_item_ops->release() 3620 * -> target_core_hba_release() 3621 */ 3622 config_item_put(item); 3623} 3624 3625static struct configfs_group_operations target_core_group_ops = { 3626 .make_group = target_core_call_addhbatotarget, 3627 .drop_item = target_core_call_delhbafromtarget, 3628}; 3629 3630static const struct config_item_type target_core_cit = { 3631 .ct_item_ops = NULL, 3632 .ct_group_ops = &target_core_group_ops, 3633 .ct_attrs = NULL, 3634 .ct_owner = THIS_MODULE, 3635}; 3636 3637/* Stop functions for struct config_item_type target_core_hba_cit */ 3638 3639void target_setup_backend_cits(struct target_backend *tb) 3640{ 3641 target_core_setup_dev_cit(tb); 3642 target_core_setup_dev_action_cit(tb); 3643 target_core_setup_dev_attrib_cit(tb); 3644 target_core_setup_dev_pr_cit(tb); 3645 target_core_setup_dev_wwn_cit(tb); 3646 target_core_setup_dev_alua_tg_pt_gps_cit(tb); 3647 target_core_setup_dev_stat_cit(tb); 3648} 3649 3650static void target_init_dbroot(void) 3651{ 3652 struct file *fp; 3653 3654 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED); 3655 fp = filp_open(db_root_stage, O_RDONLY, 0); 3656 if (IS_ERR(fp)) { 3657 pr_err("db_root: cannot open: %s\n", db_root_stage); 3658 return; 3659 } 3660 if (!S_ISDIR(file_inode(fp)->i_mode)) { 3661 filp_close(fp, NULL); 3662 pr_err("db_root: not a valid directory: %s\n", db_root_stage); 3663 return; 3664 } 3665 filp_close(fp, NULL); 3666 3667 strncpy(db_root, db_root_stage, DB_ROOT_LEN); 3668 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); 3669} 3670 3671static int __init target_core_init_configfs(void) 3672{ 3673 struct configfs_subsystem *subsys = &target_core_fabrics; 3674 struct t10_alua_lu_gp *lu_gp; 3675 struct cred *kern_cred; 3676 const struct cred *old_cred; 3677 int ret; 3678 3679 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 3680 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3681 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3682 3683 config_group_init(&subsys->su_group); 3684 mutex_init(&subsys->su_mutex); 3685 3686 ret = init_se_kmem_caches(); 3687 if (ret < 0) 3688 return ret; 3689 /* 3690 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3691 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3692 */ 3693 config_group_init_type_name(&target_core_hbagroup, "core", 3694 &target_core_cit); 3695 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group); 3696 3697 /* 3698 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3699 */ 3700 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit); 3701 configfs_add_default_group(&alua_group, &target_core_hbagroup); 3702 3703 /* 3704 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3705 * groups under /sys/kernel/config/target/core/alua/ 3706 */ 3707 config_group_init_type_name(&alua_lu_gps_group, "lu_gps", 3708 &target_core_alua_lu_gps_cit); 3709 configfs_add_default_group(&alua_lu_gps_group, &alua_group); 3710 3711 /* 3712 * Add core/alua/lu_gps/default_lu_gp 3713 */ 3714 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3715 if (IS_ERR(lu_gp)) { 3716 ret = -ENOMEM; 3717 goto out_global; 3718 } 3719 3720 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3721 &target_core_alua_lu_gp_cit); 3722 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group); 3723 3724 default_lu_gp = lu_gp; 3725 3726 /* 3727 * Register the target_core_mod subsystem with configfs. 3728 */ 3729 ret = configfs_register_subsystem(subsys); 3730 if (ret < 0) { 3731 pr_err("Error %d while registering subsystem %s\n", 3732 ret, subsys->su_group.cg_item.ci_namebuf); 3733 goto out_global; 3734 } 3735 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 3736 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s" 3737 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3738 /* 3739 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3740 */ 3741 ret = rd_module_init(); 3742 if (ret < 0) 3743 goto out; 3744 3745 ret = core_dev_setup_virtual_lun0(); 3746 if (ret < 0) 3747 goto out; 3748 3749 ret = target_xcopy_setup_pt(); 3750 if (ret < 0) 3751 goto out; 3752 3753 /* We use the kernel credentials to access the target directory */ 3754 kern_cred = prepare_kernel_cred(&init_task); 3755 if (!kern_cred) { 3756 ret = -ENOMEM; 3757 goto out; 3758 } 3759 old_cred = override_creds(kern_cred); 3760 target_init_dbroot(); 3761 revert_creds(old_cred); 3762 put_cred(kern_cred); 3763 3764 return 0; 3765 3766out: 3767 target_xcopy_release_pt(); 3768 configfs_unregister_subsystem(subsys); 3769 core_dev_release_virtual_lun0(); 3770 rd_module_exit(); 3771out_global: 3772 if (default_lu_gp) { 3773 core_alua_free_lu_gp(default_lu_gp); 3774 default_lu_gp = NULL; 3775 } 3776 release_se_kmem_caches(); 3777 return ret; 3778} 3779 3780static void __exit target_core_exit_configfs(void) 3781{ 3782 configfs_remove_default_groups(&alua_lu_gps_group); 3783 configfs_remove_default_groups(&alua_group); 3784 configfs_remove_default_groups(&target_core_hbagroup); 3785 3786 /* 3787 * We expect subsys->su_group.default_groups to be released 3788 * by configfs subsystem provider logic.. 3789 */ 3790 configfs_unregister_subsystem(&target_core_fabrics); 3791 3792 core_alua_free_lu_gp(default_lu_gp); 3793 default_lu_gp = NULL; 3794 3795 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3796 " Infrastructure\n"); 3797 3798 core_dev_release_virtual_lun0(); 3799 rd_module_exit(); 3800 target_xcopy_release_pt(); 3801 release_se_kmem_caches(); 3802} 3803 3804MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3805MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3806MODULE_LICENSE("GPL"); 3807 3808module_init(target_core_init_configfs); 3809module_exit(target_core_exit_configfs); 3810