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target_core_configfs.c
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linux-6.19.14/drivers/target/target_core_configfs.c
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 ssize_t r = -EINVAL; 112 struct path path = {}; 113 114 mutex_lock(&target_devices_lock); 115 if (target_devices) { 116 pr_err("db_root: cannot be changed because it's in use\n"); 117 goto unlock; 118 } 119 120 if (count > (DB_ROOT_LEN - 1)) { 121 pr_err("db_root: count %d exceeds DB_ROOT_LEN-1: %u\n", 122 (int)count, DB_ROOT_LEN - 1); 123 goto unlock; 124 } 125 126 read_bytes = scnprintf(db_root_stage, DB_ROOT_LEN, "%s", page); 127 if (!read_bytes) 128 goto unlock; 129 130 if (db_root_stage[read_bytes - 1] == '\n') 131 db_root_stage[read_bytes - 1] = '\0'; 132 133 /* validate new db root before accepting it */ 134 r = kern_path(db_root_stage, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, &path); 135 if (r) { 136 pr_err("db_root: cannot open: %s\n", db_root_stage); 137 if (r == -ENOTDIR) 138 pr_err("db_root: not a directory: %s\n", db_root_stage); 139 goto unlock; 140 } 141 path_put(&path); 142 143 strscpy(db_root, db_root_stage); 144 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); 145 146 r = read_bytes; 147 148unlock: 149 mutex_unlock(&target_devices_lock); 150 return r; 151} 152 153CONFIGFS_ATTR(target_core_item_, dbroot); 154 155static struct target_fabric_configfs *target_core_get_fabric( 156 const char *name) 157{ 158 struct target_fabric_configfs *tf; 159 160 if (!name) 161 return NULL; 162 163 mutex_lock(&g_tf_lock); 164 list_for_each_entry(tf, &g_tf_list, tf_list) { 165 const char *cmp_name = tf->tf_ops->fabric_alias; 166 if (!cmp_name) 167 cmp_name = tf->tf_ops->fabric_name; 168 if (!strcmp(cmp_name, name)) { 169 atomic_inc(&tf->tf_access_cnt); 170 mutex_unlock(&g_tf_lock); 171 return tf; 172 } 173 } 174 mutex_unlock(&g_tf_lock); 175 176 return NULL; 177} 178 179/* 180 * Called from struct target_core_group_ops->make_group() 181 */ 182static struct config_group *target_core_register_fabric( 183 struct config_group *group, 184 const char *name) 185{ 186 struct target_fabric_configfs *tf; 187 int ret; 188 189 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:" 190 " %s\n", group, name); 191 192 tf = target_core_get_fabric(name); 193 if (!tf) { 194 pr_debug("target_core_register_fabric() trying autoload for %s\n", 195 name); 196 197 /* 198 * Below are some hardcoded request_module() calls to automatically 199 * local fabric modules when the following is called: 200 * 201 * mkdir -p /sys/kernel/config/target/$MODULE_NAME 202 * 203 * Note that this does not limit which TCM fabric module can be 204 * registered, but simply provids auto loading logic for modules with 205 * mkdir(2) system calls with known TCM fabric modules. 206 */ 207 208 if (!strncmp(name, "iscsi", 5)) { 209 /* 210 * Automatically load the LIO Target fabric module when the 211 * following is called: 212 * 213 * mkdir -p $CONFIGFS/target/iscsi 214 */ 215 ret = request_module("iscsi_target_mod"); 216 if (ret < 0) { 217 pr_debug("request_module() failed for" 218 " iscsi_target_mod.ko: %d\n", ret); 219 return ERR_PTR(-EINVAL); 220 } 221 } else if (!strncmp(name, "loopback", 8)) { 222 /* 223 * Automatically load the tcm_loop fabric module when the 224 * following is called: 225 * 226 * mkdir -p $CONFIGFS/target/loopback 227 */ 228 ret = request_module("tcm_loop"); 229 if (ret < 0) { 230 pr_debug("request_module() failed for" 231 " tcm_loop.ko: %d\n", ret); 232 return ERR_PTR(-EINVAL); 233 } 234 } 235 236 tf = target_core_get_fabric(name); 237 } 238 239 if (!tf) { 240 pr_debug("target_core_get_fabric() failed for %s\n", 241 name); 242 return ERR_PTR(-EINVAL); 243 } 244 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:" 245 " %s\n", tf->tf_ops->fabric_name); 246 /* 247 * On a successful target_core_get_fabric() look, the returned 248 * struct target_fabric_configfs *tf will contain a usage reference. 249 */ 250 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n", 251 &tf->tf_wwn_cit); 252 253 config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit); 254 255 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth", 256 &tf->tf_discovery_cit); 257 configfs_add_default_group(&tf->tf_disc_group, &tf->tf_group); 258 259 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric: %s\n", 260 config_item_name(&tf->tf_group.cg_item)); 261 return &tf->tf_group; 262} 263 264/* 265 * Called from struct target_core_group_ops->drop_item() 266 */ 267static void target_core_deregister_fabric( 268 struct config_group *group, 269 struct config_item *item) 270{ 271 struct target_fabric_configfs *tf = container_of( 272 to_config_group(item), struct target_fabric_configfs, tf_group); 273 274 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in" 275 " tf list\n", config_item_name(item)); 276 277 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:" 278 " %s\n", tf->tf_ops->fabric_name); 279 atomic_dec(&tf->tf_access_cnt); 280 281 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci" 282 " %s\n", config_item_name(item)); 283 284 configfs_remove_default_groups(&tf->tf_group); 285 config_item_put(item); 286} 287 288static struct configfs_group_operations target_core_fabric_group_ops = { 289 .make_group = &target_core_register_fabric, 290 .drop_item = &target_core_deregister_fabric, 291}; 292 293/* 294 * All item attributes appearing in /sys/kernel/target/ appear here. 295 */ 296static struct configfs_attribute *target_core_fabric_item_attrs[] = { 297 &target_core_item_attr_version, 298 &target_core_item_attr_dbroot, 299 NULL, 300}; 301 302/* 303 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/ 304 */ 305static const struct config_item_type target_core_fabrics_item = { 306 .ct_group_ops = &target_core_fabric_group_ops, 307 .ct_attrs = target_core_fabric_item_attrs, 308 .ct_owner = THIS_MODULE, 309}; 310 311static struct configfs_subsystem target_core_fabrics = { 312 .su_group = { 313 .cg_item = { 314 .ci_namebuf = "target", 315 .ci_type = &target_core_fabrics_item, 316 }, 317 }, 318}; 319 320int target_depend_item(struct config_item *item) 321{ 322 return configfs_depend_item(&target_core_fabrics, item); 323} 324EXPORT_SYMBOL(target_depend_item); 325 326void target_undepend_item(struct config_item *item) 327{ 328 return configfs_undepend_item(item); 329} 330EXPORT_SYMBOL(target_undepend_item); 331 332/*############################################################################## 333// Start functions called by external Target Fabrics Modules 334//############################################################################*/ 335static int target_disable_feature(struct se_portal_group *se_tpg) 336{ 337 return 0; 338} 339 340static u32 target_default_get_inst_index(struct se_portal_group *se_tpg) 341{ 342 return 1; 343} 344 345static u32 target_default_sess_get_index(struct se_session *se_sess) 346{ 347 return 0; 348} 349 350static void target_set_default_node_attributes(struct se_node_acl *se_acl) 351{ 352} 353 354static int target_default_get_cmd_state(struct se_cmd *se_cmd) 355{ 356 return 0; 357} 358 359static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo) 360{ 361 if (tfo->fabric_alias) { 362 if (strlen(tfo->fabric_alias) >= TARGET_FABRIC_NAME_SIZE) { 363 pr_err("Passed alias: %s exceeds " 364 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_alias); 365 return -EINVAL; 366 } 367 } 368 if (!tfo->fabric_name) { 369 pr_err("Missing tfo->fabric_name\n"); 370 return -EINVAL; 371 } 372 if (strlen(tfo->fabric_name) >= TARGET_FABRIC_NAME_SIZE) { 373 pr_err("Passed name: %s exceeds " 374 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_name); 375 return -EINVAL; 376 } 377 if (!tfo->tpg_get_wwn) { 378 pr_err("Missing tfo->tpg_get_wwn()\n"); 379 return -EINVAL; 380 } 381 if (!tfo->tpg_get_tag) { 382 pr_err("Missing tfo->tpg_get_tag()\n"); 383 return -EINVAL; 384 } 385 if (!tfo->release_cmd) { 386 pr_err("Missing tfo->release_cmd()\n"); 387 return -EINVAL; 388 } 389 if (!tfo->write_pending) { 390 pr_err("Missing tfo->write_pending()\n"); 391 return -EINVAL; 392 } 393 if (!tfo->queue_data_in) { 394 pr_err("Missing tfo->queue_data_in()\n"); 395 return -EINVAL; 396 } 397 if (!tfo->queue_status) { 398 pr_err("Missing tfo->queue_status()\n"); 399 return -EINVAL; 400 } 401 if (!tfo->queue_tm_rsp) { 402 pr_err("Missing tfo->queue_tm_rsp()\n"); 403 return -EINVAL; 404 } 405 if (!tfo->aborted_task) { 406 pr_err("Missing tfo->aborted_task()\n"); 407 return -EINVAL; 408 } 409 if (!tfo->check_stop_free) { 410 pr_err("Missing tfo->check_stop_free()\n"); 411 return -EINVAL; 412 } 413 /* 414 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn() 415 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in 416 * target_core_fabric_configfs.c WWN+TPG group context code. 417 */ 418 if (!tfo->fabric_make_wwn) { 419 pr_err("Missing tfo->fabric_make_wwn()\n"); 420 return -EINVAL; 421 } 422 if (!tfo->fabric_drop_wwn) { 423 pr_err("Missing tfo->fabric_drop_wwn()\n"); 424 return -EINVAL; 425 } 426 if (!tfo->fabric_make_tpg) { 427 pr_err("Missing tfo->fabric_make_tpg()\n"); 428 return -EINVAL; 429 } 430 if (!tfo->fabric_drop_tpg) { 431 pr_err("Missing tfo->fabric_drop_tpg()\n"); 432 return -EINVAL; 433 } 434 435 return 0; 436} 437 438static void target_set_default_ops(struct target_core_fabric_ops *tfo) 439{ 440 if (!tfo->tpg_check_demo_mode) 441 tfo->tpg_check_demo_mode = target_disable_feature; 442 443 if (!tfo->tpg_check_demo_mode_cache) 444 tfo->tpg_check_demo_mode_cache = target_disable_feature; 445 446 if (!tfo->tpg_check_demo_mode_write_protect) 447 tfo->tpg_check_demo_mode_write_protect = target_disable_feature; 448 449 if (!tfo->tpg_check_prod_mode_write_protect) 450 tfo->tpg_check_prod_mode_write_protect = target_disable_feature; 451 452 if (!tfo->tpg_get_inst_index) 453 tfo->tpg_get_inst_index = target_default_get_inst_index; 454 455 if (!tfo->sess_get_index) 456 tfo->sess_get_index = target_default_sess_get_index; 457 458 if (!tfo->set_default_node_attributes) 459 tfo->set_default_node_attributes = target_set_default_node_attributes; 460 461 if (!tfo->get_cmd_state) 462 tfo->get_cmd_state = target_default_get_cmd_state; 463} 464 465int target_register_template(const struct target_core_fabric_ops *fo) 466{ 467 struct target_core_fabric_ops *tfo; 468 struct target_fabric_configfs *tf; 469 int ret; 470 471 ret = target_fabric_tf_ops_check(fo); 472 if (ret) 473 return ret; 474 475 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL); 476 if (!tf) { 477 pr_err("%s: could not allocate memory!\n", __func__); 478 return -ENOMEM; 479 } 480 tfo = kzalloc(sizeof(struct target_core_fabric_ops), GFP_KERNEL); 481 if (!tfo) { 482 kfree(tf); 483 pr_err("%s: could not allocate memory!\n", __func__); 484 return -ENOMEM; 485 } 486 memcpy(tfo, fo, sizeof(*tfo)); 487 target_set_default_ops(tfo); 488 489 INIT_LIST_HEAD(&tf->tf_list); 490 atomic_set(&tf->tf_access_cnt, 0); 491 tf->tf_ops = tfo; 492 target_fabric_setup_cits(tf); 493 494 mutex_lock(&g_tf_lock); 495 list_add_tail(&tf->tf_list, &g_tf_list); 496 mutex_unlock(&g_tf_lock); 497 498 return 0; 499} 500EXPORT_SYMBOL(target_register_template); 501 502void target_unregister_template(const struct target_core_fabric_ops *fo) 503{ 504 struct target_fabric_configfs *t; 505 506 mutex_lock(&g_tf_lock); 507 list_for_each_entry(t, &g_tf_list, tf_list) { 508 if (!strcmp(t->tf_ops->fabric_name, fo->fabric_name)) { 509 BUG_ON(atomic_read(&t->tf_access_cnt)); 510 list_del(&t->tf_list); 511 mutex_unlock(&g_tf_lock); 512 /* 513 * Wait for any outstanding fabric se_deve_entry->rcu_head 514 * callbacks to complete post kfree_rcu(), before allowing 515 * fabric driver unload of TFO->module to proceed. 516 */ 517 rcu_barrier(); 518 kfree(t->tf_tpg_base_cit.ct_attrs); 519 kfree(t->tf_ops); 520 kfree(t); 521 return; 522 } 523 } 524 mutex_unlock(&g_tf_lock); 525} 526EXPORT_SYMBOL(target_unregister_template); 527 528/*############################################################################## 529// Stop functions called by external Target Fabrics Modules 530//############################################################################*/ 531 532static inline struct se_dev_attrib *to_attrib(struct config_item *item) 533{ 534 return container_of(to_config_group(item), struct se_dev_attrib, 535 da_group); 536} 537 538/* Start functions for struct config_item_type tb_dev_attrib_cit */ 539#define DEF_CONFIGFS_ATTRIB_SHOW(_name) \ 540static ssize_t _name##_show(struct config_item *item, char *page) \ 541{ \ 542 return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \ 543} 544 545DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias); 546DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo); 547DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write); 548DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read); 549DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache); 550DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl); 551DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas); 552DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu); 553DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws); 554DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw); 555DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc); 556DEF_CONFIGFS_ATTRIB_SHOW(emulate_pr); 557DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type); 558DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type); 559DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify); 560DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids); 561DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot); 562DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord); 563DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl); 564DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size); 565DEF_CONFIGFS_ATTRIB_SHOW(block_size); 566DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors); 567DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors); 568DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth); 569DEF_CONFIGFS_ATTRIB_SHOW(queue_depth); 570DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count); 571DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count); 572DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity); 573DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment); 574DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data); 575DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len); 576DEF_CONFIGFS_ATTRIB_SHOW(emulate_rsoc); 577DEF_CONFIGFS_ATTRIB_SHOW(submit_type); 578DEF_CONFIGFS_ATTRIB_SHOW(atomic_max_len); 579DEF_CONFIGFS_ATTRIB_SHOW(atomic_alignment); 580DEF_CONFIGFS_ATTRIB_SHOW(atomic_granularity); 581DEF_CONFIGFS_ATTRIB_SHOW(atomic_max_with_boundary); 582DEF_CONFIGFS_ATTRIB_SHOW(atomic_max_boundary); 583 584#define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \ 585static ssize_t _name##_store(struct config_item *item, const char *page,\ 586 size_t count) \ 587{ \ 588 struct se_dev_attrib *da = to_attrib(item); \ 589 u32 val; \ 590 int ret; \ 591 \ 592 ret = kstrtou32(page, 0, &val); \ 593 if (ret < 0) \ 594 return ret; \ 595 da->_name = val; \ 596 return count; \ 597} 598 599DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count); 600DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count); 601DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity); 602DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment); 603DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len); 604 605#define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \ 606static ssize_t _name##_store(struct config_item *item, const char *page, \ 607 size_t count) \ 608{ \ 609 struct se_dev_attrib *da = to_attrib(item); \ 610 bool flag; \ 611 int ret; \ 612 \ 613 ret = kstrtobool(page, &flag); \ 614 if (ret < 0) \ 615 return ret; \ 616 da->_name = flag; \ 617 return count; \ 618} 619 620DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write); 621DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw); 622DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc); 623DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr); 624DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids); 625DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot); 626 627#define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \ 628static ssize_t _name##_store(struct config_item *item, const char *page,\ 629 size_t count) \ 630{ \ 631 printk_once(KERN_WARNING \ 632 "ignoring deprecated %s attribute\n", \ 633 __stringify(_name)); \ 634 return count; \ 635} 636 637DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo); 638DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read); 639 640static void dev_set_t10_wwn_model_alias(struct se_device *dev) 641{ 642 const char *configname; 643 644 configname = config_item_name(&dev->dev_group.cg_item); 645 if (strlen(configname) >= INQUIRY_MODEL_LEN) { 646 pr_warn("dev[%p]: Backstore name '%s' is too long for " 647 "INQUIRY_MODEL, truncating to 15 characters\n", dev, 648 configname); 649 } 650 /* 651 * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1) 652 * here without potentially breaking existing setups, so continue to 653 * truncate one byte shorter than what can be carried in INQUIRY. 654 */ 655 strscpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN); 656} 657 658static ssize_t emulate_model_alias_store(struct config_item *item, 659 const char *page, size_t count) 660{ 661 struct se_dev_attrib *da = to_attrib(item); 662 struct se_device *dev = da->da_dev; 663 bool flag; 664 int ret; 665 666 if (dev->export_count) { 667 pr_err("dev[%p]: Unable to change model alias" 668 " while export_count is %d\n", 669 dev, dev->export_count); 670 return -EINVAL; 671 } 672 673 ret = kstrtobool(page, &flag); 674 if (ret < 0) 675 return ret; 676 677 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); 678 if (flag) 679 dev_set_t10_wwn_model_alias(dev); 680 else 681 strscpy(dev->t10_wwn.model, dev->transport->inquiry_prod); 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); 1305CONFIGFS_ATTR_RO(, atomic_max_len); 1306CONFIGFS_ATTR_RO(, atomic_alignment); 1307CONFIGFS_ATTR_RO(, atomic_granularity); 1308CONFIGFS_ATTR_RO(, atomic_max_with_boundary); 1309CONFIGFS_ATTR_RO(, atomic_max_boundary); 1310 1311/* 1312 * dev_attrib attributes for devices using the target core SBC/SPC 1313 * interpreter. Any backend using spc_parse_cdb should be using 1314 * these. 1315 */ 1316struct configfs_attribute *sbc_attrib_attrs[] = { 1317 &attr_emulate_model_alias, 1318 &attr_emulate_dpo, 1319 &attr_emulate_fua_write, 1320 &attr_emulate_fua_read, 1321 &attr_emulate_write_cache, 1322 &attr_emulate_ua_intlck_ctrl, 1323 &attr_emulate_tas, 1324 &attr_emulate_tpu, 1325 &attr_emulate_tpws, 1326 &attr_emulate_caw, 1327 &attr_emulate_3pc, 1328 &attr_emulate_pr, 1329 &attr_pi_prot_type, 1330 &attr_hw_pi_prot_type, 1331 &attr_pi_prot_format, 1332 &attr_pi_prot_verify, 1333 &attr_enforce_pr_isids, 1334 &attr_is_nonrot, 1335 &attr_emulate_rest_reord, 1336 &attr_force_pr_aptpl, 1337 &attr_hw_block_size, 1338 &attr_block_size, 1339 &attr_hw_max_sectors, 1340 &attr_optimal_sectors, 1341 &attr_hw_queue_depth, 1342 &attr_queue_depth, 1343 &attr_max_unmap_lba_count, 1344 &attr_max_unmap_block_desc_count, 1345 &attr_unmap_granularity, 1346 &attr_unmap_granularity_alignment, 1347 &attr_unmap_zeroes_data, 1348 &attr_max_write_same_len, 1349 &attr_alua_support, 1350 &attr_pgr_support, 1351 &attr_emulate_rsoc, 1352 &attr_submit_type, 1353 &attr_atomic_alignment, 1354 &attr_atomic_max_len, 1355 &attr_atomic_granularity, 1356 &attr_atomic_max_with_boundary, 1357 &attr_atomic_max_boundary, 1358 NULL, 1359}; 1360EXPORT_SYMBOL(sbc_attrib_attrs); 1361 1362/* 1363 * Minimal dev_attrib attributes for devices passing through CDBs. 1364 * In this case we only provide a few read-only attributes for 1365 * backwards compatibility. 1366 */ 1367struct configfs_attribute *passthrough_attrib_attrs[] = { 1368 &attr_hw_pi_prot_type, 1369 &attr_hw_block_size, 1370 &attr_hw_max_sectors, 1371 &attr_hw_queue_depth, 1372 &attr_emulate_pr, 1373 &attr_alua_support, 1374 &attr_pgr_support, 1375 &attr_submit_type, 1376 NULL, 1377}; 1378EXPORT_SYMBOL(passthrough_attrib_attrs); 1379 1380/* 1381 * pr related dev_attrib attributes for devices passing through CDBs, 1382 * but allowing in core pr emulation. 1383 */ 1384struct configfs_attribute *passthrough_pr_attrib_attrs[] = { 1385 &attr_enforce_pr_isids, 1386 &attr_force_pr_aptpl, 1387 NULL, 1388}; 1389EXPORT_SYMBOL(passthrough_pr_attrib_attrs); 1390 1391TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL); 1392TB_CIT_SETUP_DRV(dev_action, NULL, NULL); 1393 1394/* End functions for struct config_item_type tb_dev_attrib_cit */ 1395 1396/* Start functions for struct config_item_type tb_dev_wwn_cit */ 1397 1398static struct t10_wwn *to_t10_wwn(struct config_item *item) 1399{ 1400 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group); 1401} 1402 1403static ssize_t target_check_inquiry_data(char *buf) 1404{ 1405 size_t len; 1406 int i; 1407 1408 len = strlen(buf); 1409 1410 /* 1411 * SPC 4.3.1: 1412 * ASCII data fields shall contain only ASCII printable characters 1413 * (i.e., code values 20h to 7Eh) and may be terminated with one or 1414 * more ASCII null (00h) characters. 1415 */ 1416 for (i = 0; i < len; i++) { 1417 if (buf[i] < 0x20 || buf[i] > 0x7E) { 1418 pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n"); 1419 return -EINVAL; 1420 } 1421 } 1422 1423 return len; 1424} 1425 1426/* 1427 * STANDARD and VPD page 0x83 T10 Vendor Identification 1428 */ 1429static ssize_t target_wwn_vendor_id_show(struct config_item *item, 1430 char *page) 1431{ 1432 return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]); 1433} 1434 1435static ssize_t target_wwn_vendor_id_store(struct config_item *item, 1436 const char *page, size_t count) 1437{ 1438 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1439 struct se_device *dev = t10_wwn->t10_dev; 1440 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1441 unsigned char buf[INQUIRY_VENDOR_LEN + 2]; 1442 char *stripped = NULL; 1443 ssize_t len; 1444 ssize_t ret; 1445 1446 len = strscpy(buf, page); 1447 if (len > 0) { 1448 /* Strip any newline added from userspace. */ 1449 stripped = strstrip(buf); 1450 len = strlen(stripped); 1451 } 1452 if (len < 0 || len > INQUIRY_VENDOR_LEN) { 1453 pr_err("Emulated T10 Vendor Identification exceeds" 1454 " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN) 1455 "\n"); 1456 return -EOVERFLOW; 1457 } 1458 1459 ret = target_check_inquiry_data(stripped); 1460 1461 if (ret < 0) 1462 return ret; 1463 1464 /* 1465 * Check to see if any active exports exist. If they do exist, fail 1466 * here as changing this information on the fly (underneath the 1467 * initiator side OS dependent multipath code) could cause negative 1468 * effects. 1469 */ 1470 if (dev->export_count) { 1471 pr_err("Unable to set T10 Vendor Identification while" 1472 " active %d exports exist\n", dev->export_count); 1473 return -EINVAL; 1474 } 1475 1476 BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1); 1477 strscpy(dev->t10_wwn.vendor, stripped); 1478 1479 pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:" 1480 " %s\n", dev->t10_wwn.vendor); 1481 1482 return count; 1483} 1484 1485static ssize_t target_wwn_product_id_show(struct config_item *item, 1486 char *page) 1487{ 1488 return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]); 1489} 1490 1491static ssize_t target_wwn_product_id_store(struct config_item *item, 1492 const char *page, size_t count) 1493{ 1494 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1495 struct se_device *dev = t10_wwn->t10_dev; 1496 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1497 unsigned char buf[INQUIRY_MODEL_LEN + 2]; 1498 char *stripped = NULL; 1499 ssize_t len; 1500 ssize_t ret; 1501 1502 len = strscpy(buf, page); 1503 if (len > 0) { 1504 /* Strip any newline added from userspace. */ 1505 stripped = strstrip(buf); 1506 len = strlen(stripped); 1507 } 1508 if (len < 0 || len > INQUIRY_MODEL_LEN) { 1509 pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: " 1510 __stringify(INQUIRY_MODEL_LEN) 1511 "\n"); 1512 return -EOVERFLOW; 1513 } 1514 1515 ret = target_check_inquiry_data(stripped); 1516 1517 if (ret < 0) 1518 return ret; 1519 1520 /* 1521 * Check to see if any active exports exist. If they do exist, fail 1522 * here as changing this information on the fly (underneath the 1523 * initiator side OS dependent multipath code) could cause negative 1524 * effects. 1525 */ 1526 if (dev->export_count) { 1527 pr_err("Unable to set T10 Model while active %d exports exist\n", 1528 dev->export_count); 1529 return -EINVAL; 1530 } 1531 1532 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); 1533 strscpy(dev->t10_wwn.model, stripped); 1534 1535 pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n", 1536 dev->t10_wwn.model); 1537 1538 return count; 1539} 1540 1541static ssize_t target_wwn_revision_show(struct config_item *item, 1542 char *page) 1543{ 1544 return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]); 1545} 1546 1547static ssize_t target_wwn_revision_store(struct config_item *item, 1548 const char *page, size_t count) 1549{ 1550 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1551 struct se_device *dev = t10_wwn->t10_dev; 1552 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1553 unsigned char buf[INQUIRY_REVISION_LEN + 2]; 1554 char *stripped = NULL; 1555 ssize_t len; 1556 ssize_t ret; 1557 1558 len = strscpy(buf, page); 1559 if (len > 0) { 1560 /* Strip any newline added from userspace. */ 1561 stripped = strstrip(buf); 1562 len = strlen(stripped); 1563 } 1564 if (len < 0 || len > INQUIRY_REVISION_LEN) { 1565 pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: " 1566 __stringify(INQUIRY_REVISION_LEN) 1567 "\n"); 1568 return -EOVERFLOW; 1569 } 1570 1571 ret = target_check_inquiry_data(stripped); 1572 1573 if (ret < 0) 1574 return ret; 1575 1576 /* 1577 * Check to see if any active exports exist. If they do exist, fail 1578 * here as changing this information on the fly (underneath the 1579 * initiator side OS dependent multipath code) could cause negative 1580 * effects. 1581 */ 1582 if (dev->export_count) { 1583 pr_err("Unable to set T10 Revision while active %d exports exist\n", 1584 dev->export_count); 1585 return -EINVAL; 1586 } 1587 1588 BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1); 1589 strscpy(dev->t10_wwn.revision, stripped); 1590 1591 pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n", 1592 dev->t10_wwn.revision); 1593 1594 return count; 1595} 1596 1597static ssize_t 1598target_wwn_company_id_show(struct config_item *item, 1599 char *page) 1600{ 1601 return snprintf(page, PAGE_SIZE, "%#08x\n", 1602 to_t10_wwn(item)->company_id); 1603} 1604 1605static ssize_t 1606target_wwn_company_id_store(struct config_item *item, 1607 const char *page, size_t count) 1608{ 1609 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1610 struct se_device *dev = t10_wwn->t10_dev; 1611 u32 val; 1612 int ret; 1613 1614 /* 1615 * The IEEE COMPANY_ID field should contain a 24-bit canonical 1616 * form OUI assigned by the IEEE. 1617 */ 1618 ret = kstrtou32(page, 0, &val); 1619 if (ret < 0) 1620 return ret; 1621 1622 if (val >= 0x1000000) 1623 return -EOVERFLOW; 1624 1625 /* 1626 * Check to see if any active exports exist. If they do exist, fail 1627 * here as changing this information on the fly (underneath the 1628 * initiator side OS dependent multipath code) could cause negative 1629 * effects. 1630 */ 1631 if (dev->export_count) { 1632 pr_err("Unable to set Company ID while %u exports exist\n", 1633 dev->export_count); 1634 return -EINVAL; 1635 } 1636 1637 t10_wwn->company_id = val; 1638 1639 pr_debug("Target_Core_ConfigFS: Set IEEE Company ID: %#08x\n", 1640 t10_wwn->company_id); 1641 1642 return count; 1643} 1644 1645/* 1646 * VPD page 0x80 Unit serial 1647 */ 1648static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item, 1649 char *page) 1650{ 1651 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 1652 &to_t10_wwn(item)->unit_serial[0]); 1653} 1654 1655static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item, 1656 const char *page, size_t count) 1657{ 1658 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1659 struct se_device *dev = t10_wwn->t10_dev; 1660 unsigned char buf[INQUIRY_VPD_SERIAL_LEN] = { }; 1661 1662 /* 1663 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 1664 * from the struct scsi_device level firmware, do not allow 1665 * VPD Unit Serial to be emulated. 1666 * 1667 * Note this struct scsi_device could also be emulating VPD 1668 * information from its drivers/scsi LLD. But for now we assume 1669 * it is doing 'the right thing' wrt a world wide unique 1670 * VPD Unit Serial Number that OS dependent multipath can depend on. 1671 */ 1672 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) { 1673 pr_err("Underlying SCSI device firmware provided VPD" 1674 " Unit Serial, ignoring request\n"); 1675 return -EOPNOTSUPP; 1676 } 1677 1678 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 1679 pr_err("Emulated VPD Unit Serial exceeds" 1680 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 1681 return -EOVERFLOW; 1682 } 1683 /* 1684 * Check to see if any active $FABRIC_MOD exports exist. If they 1685 * do exist, fail here as changing this information on the fly 1686 * (underneath the initiator side OS dependent multipath code) 1687 * could cause negative effects. 1688 */ 1689 if (dev->export_count) { 1690 pr_err("Unable to set VPD Unit Serial while" 1691 " active %d $FABRIC_MOD exports exist\n", 1692 dev->export_count); 1693 return -EINVAL; 1694 } 1695 1696 /* 1697 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 1698 * 1699 * Also, strip any newline added from the userspace 1700 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 1701 */ 1702 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 1703 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 1704 "%s", strstrip(buf)); 1705 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL; 1706 1707 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 1708 " %s\n", dev->t10_wwn.unit_serial); 1709 1710 return count; 1711} 1712 1713/* 1714 * VPD page 0x83 Protocol Identifier 1715 */ 1716static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item, 1717 char *page) 1718{ 1719 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1720 struct t10_vpd *vpd; 1721 unsigned char buf[VPD_TMP_BUF_SIZE] = { }; 1722 ssize_t len = 0; 1723 1724 spin_lock(&t10_wwn->t10_vpd_lock); 1725 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 1726 if (!vpd->protocol_identifier_set) 1727 continue; 1728 1729 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 1730 1731 if (len + strlen(buf) >= PAGE_SIZE) 1732 break; 1733 1734 len += sprintf(page+len, "%s", buf); 1735 } 1736 spin_unlock(&t10_wwn->t10_vpd_lock); 1737 1738 return len; 1739} 1740 1741/* 1742 * Generic wrapper for dumping VPD identifiers by association. 1743 */ 1744#define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 1745static ssize_t target_wwn_##_name##_show(struct config_item *item, \ 1746 char *page) \ 1747{ \ 1748 struct t10_wwn *t10_wwn = to_t10_wwn(item); \ 1749 struct t10_vpd *vpd; \ 1750 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 1751 ssize_t len = 0; \ 1752 \ 1753 spin_lock(&t10_wwn->t10_vpd_lock); \ 1754 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 1755 if (vpd->association != _assoc) \ 1756 continue; \ 1757 \ 1758 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1759 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 1760 if (len + strlen(buf) >= PAGE_SIZE) \ 1761 break; \ 1762 len += sprintf(page+len, "%s", buf); \ 1763 \ 1764 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1765 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 1766 if (len + strlen(buf) >= PAGE_SIZE) \ 1767 break; \ 1768 len += sprintf(page+len, "%s", buf); \ 1769 \ 1770 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1771 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 1772 if (len + strlen(buf) >= PAGE_SIZE) \ 1773 break; \ 1774 len += sprintf(page+len, "%s", buf); \ 1775 } \ 1776 spin_unlock(&t10_wwn->t10_vpd_lock); \ 1777 \ 1778 return len; \ 1779} 1780 1781/* VPD page 0x83 Association: Logical Unit */ 1782DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 1783/* VPD page 0x83 Association: Target Port */ 1784DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 1785/* VPD page 0x83 Association: SCSI Target Device */ 1786DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 1787 1788CONFIGFS_ATTR(target_wwn_, vendor_id); 1789CONFIGFS_ATTR(target_wwn_, product_id); 1790CONFIGFS_ATTR(target_wwn_, revision); 1791CONFIGFS_ATTR(target_wwn_, company_id); 1792CONFIGFS_ATTR(target_wwn_, vpd_unit_serial); 1793CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier); 1794CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit); 1795CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port); 1796CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device); 1797 1798static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 1799 &target_wwn_attr_vendor_id, 1800 &target_wwn_attr_product_id, 1801 &target_wwn_attr_revision, 1802 &target_wwn_attr_company_id, 1803 &target_wwn_attr_vpd_unit_serial, 1804 &target_wwn_attr_vpd_protocol_identifier, 1805 &target_wwn_attr_vpd_assoc_logical_unit, 1806 &target_wwn_attr_vpd_assoc_target_port, 1807 &target_wwn_attr_vpd_assoc_scsi_target_device, 1808 NULL, 1809}; 1810 1811TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs); 1812 1813/* End functions for struct config_item_type tb_dev_wwn_cit */ 1814 1815/* Start functions for struct config_item_type tb_dev_pr_cit */ 1816 1817static struct se_device *pr_to_dev(struct config_item *item) 1818{ 1819 return container_of(to_config_group(item), struct se_device, 1820 dev_pr_group); 1821} 1822 1823static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev, 1824 char *page) 1825{ 1826 struct se_node_acl *se_nacl; 1827 struct t10_pr_registration *pr_reg; 1828 char i_buf[PR_REG_ISID_ID_LEN] = { }; 1829 1830 pr_reg = dev->dev_pr_res_holder; 1831 if (!pr_reg) 1832 return sprintf(page, "No SPC-3 Reservation holder\n"); 1833 1834 se_nacl = pr_reg->pr_reg_nacl; 1835 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1836 1837 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", 1838 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1839 se_nacl->initiatorname, i_buf); 1840} 1841 1842static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, 1843 char *page) 1844{ 1845 struct se_session *sess = dev->reservation_holder; 1846 struct se_node_acl *se_nacl; 1847 ssize_t len; 1848 1849 if (sess) { 1850 se_nacl = sess->se_node_acl; 1851 len = sprintf(page, 1852 "SPC-2 Reservation: %s Initiator: %s\n", 1853 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1854 se_nacl->initiatorname); 1855 } else { 1856 len = sprintf(page, "No SPC-2 Reservation holder\n"); 1857 } 1858 return len; 1859} 1860 1861static ssize_t target_pr_res_holder_show(struct config_item *item, char *page) 1862{ 1863 struct se_device *dev = pr_to_dev(item); 1864 int ret; 1865 1866 if (!dev->dev_attrib.emulate_pr) 1867 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 1868 1869 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1870 return sprintf(page, "Passthrough\n"); 1871 1872 spin_lock(&dev->dev_reservation_lock); 1873 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1874 ret = target_core_dev_pr_show_spc2_res(dev, page); 1875 else 1876 ret = target_core_dev_pr_show_spc3_res(dev, page); 1877 spin_unlock(&dev->dev_reservation_lock); 1878 return ret; 1879} 1880 1881static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item, 1882 char *page) 1883{ 1884 struct se_device *dev = pr_to_dev(item); 1885 ssize_t len = 0; 1886 1887 spin_lock(&dev->dev_reservation_lock); 1888 if (!dev->dev_pr_res_holder) { 1889 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1890 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { 1891 len = sprintf(page, "SPC-3 Reservation: All Target" 1892 " Ports registration\n"); 1893 } else { 1894 len = sprintf(page, "SPC-3 Reservation: Single" 1895 " Target Port registration\n"); 1896 } 1897 1898 spin_unlock(&dev->dev_reservation_lock); 1899 return len; 1900} 1901 1902static ssize_t target_pr_res_pr_generation_show(struct config_item *item, 1903 char *page) 1904{ 1905 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation); 1906} 1907 1908 1909static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item, 1910 char *page) 1911{ 1912 struct se_device *dev = pr_to_dev(item); 1913 struct se_node_acl *se_nacl; 1914 struct se_portal_group *se_tpg; 1915 struct t10_pr_registration *pr_reg; 1916 const struct target_core_fabric_ops *tfo; 1917 ssize_t len = 0; 1918 1919 spin_lock(&dev->dev_reservation_lock); 1920 pr_reg = dev->dev_pr_res_holder; 1921 if (!pr_reg) { 1922 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1923 goto out_unlock; 1924 } 1925 1926 se_nacl = pr_reg->pr_reg_nacl; 1927 se_tpg = se_nacl->se_tpg; 1928 tfo = se_tpg->se_tpg_tfo; 1929 1930 len += sprintf(page+len, "SPC-3 Reservation: %s" 1931 " Target Node Endpoint: %s\n", tfo->fabric_name, 1932 tfo->tpg_get_wwn(se_tpg)); 1933 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1934 " Identifier Tag: %hu %s Portal Group Tag: %hu" 1935 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi, 1936 tfo->fabric_name, tfo->tpg_get_tag(se_tpg), 1937 tfo->fabric_name, pr_reg->pr_aptpl_target_lun); 1938 1939out_unlock: 1940 spin_unlock(&dev->dev_reservation_lock); 1941 return len; 1942} 1943 1944 1945static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item, 1946 char *page) 1947{ 1948 struct se_device *dev = pr_to_dev(item); 1949 const struct target_core_fabric_ops *tfo; 1950 struct t10_pr_registration *pr_reg; 1951 unsigned char buf[384]; 1952 char i_buf[PR_REG_ISID_ID_LEN]; 1953 ssize_t len = 0; 1954 int reg_count = 0; 1955 1956 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 1957 1958 spin_lock(&dev->t10_pr.registration_lock); 1959 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 1960 pr_reg_list) { 1961 1962 memset(buf, 0, 384); 1963 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1964 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1965 core_pr_dump_initiator_port(pr_reg, i_buf, 1966 PR_REG_ISID_ID_LEN); 1967 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 1968 tfo->fabric_name, 1969 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, 1970 pr_reg->pr_res_generation); 1971 1972 if (len + strlen(buf) >= PAGE_SIZE) 1973 break; 1974 1975 len += sprintf(page+len, "%s", buf); 1976 reg_count++; 1977 } 1978 spin_unlock(&dev->t10_pr.registration_lock); 1979 1980 if (!reg_count) 1981 len += sprintf(page+len, "None\n"); 1982 1983 return len; 1984} 1985 1986static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page) 1987{ 1988 struct se_device *dev = pr_to_dev(item); 1989 struct t10_pr_registration *pr_reg; 1990 ssize_t len = 0; 1991 1992 spin_lock(&dev->dev_reservation_lock); 1993 pr_reg = dev->dev_pr_res_holder; 1994 if (pr_reg) { 1995 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 1996 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 1997 } else { 1998 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1999 } 2000 2001 spin_unlock(&dev->dev_reservation_lock); 2002 return len; 2003} 2004 2005static ssize_t target_pr_res_type_show(struct config_item *item, char *page) 2006{ 2007 struct se_device *dev = pr_to_dev(item); 2008 2009 if (!dev->dev_attrib.emulate_pr) 2010 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 2011 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 2012 return sprintf(page, "SPC_PASSTHROUGH\n"); 2013 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 2014 return sprintf(page, "SPC2_RESERVATIONS\n"); 2015 2016 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 2017} 2018 2019static ssize_t target_pr_res_aptpl_active_show(struct config_item *item, 2020 char *page) 2021{ 2022 struct se_device *dev = pr_to_dev(item); 2023 2024 if (!dev->dev_attrib.emulate_pr || 2025 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 2026 return 0; 2027 2028 return sprintf(page, "APTPL Bit Status: %s\n", 2029 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 2030} 2031 2032static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item, 2033 char *page) 2034{ 2035 struct se_device *dev = pr_to_dev(item); 2036 2037 if (!dev->dev_attrib.emulate_pr || 2038 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 2039 return 0; 2040 2041 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 2042} 2043 2044enum { 2045 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 2046 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 2047 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 2048 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 2049}; 2050 2051static match_table_t tokens = { 2052 {Opt_initiator_fabric, "initiator_fabric=%s"}, 2053 {Opt_initiator_node, "initiator_node=%s"}, 2054 {Opt_initiator_sid, "initiator_sid=%s"}, 2055 {Opt_sa_res_key, "sa_res_key=%s"}, 2056 {Opt_res_holder, "res_holder=%d"}, 2057 {Opt_res_type, "res_type=%d"}, 2058 {Opt_res_scope, "res_scope=%d"}, 2059 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 2060 {Opt_mapped_lun, "mapped_lun=%u"}, 2061 {Opt_target_fabric, "target_fabric=%s"}, 2062 {Opt_target_node, "target_node=%s"}, 2063 {Opt_tpgt, "tpgt=%d"}, 2064 {Opt_port_rtpi, "port_rtpi=%d"}, 2065 {Opt_target_lun, "target_lun=%u"}, 2066 {Opt_err, NULL} 2067}; 2068 2069static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item, 2070 const char *page, size_t count) 2071{ 2072 struct se_device *dev = pr_to_dev(item); 2073 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 2074 unsigned char *t_fabric = NULL, *t_port = NULL; 2075 char *orig, *ptr, *opts; 2076 substring_t args[MAX_OPT_ARGS]; 2077 unsigned long long tmp_ll; 2078 u64 sa_res_key = 0; 2079 u64 mapped_lun = 0, target_lun = 0; 2080 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 2081 u16 tpgt = 0; 2082 u8 type = 0; 2083 2084 if (!dev->dev_attrib.emulate_pr || 2085 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 2086 return count; 2087 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 2088 return count; 2089 2090 if (dev->export_count) { 2091 pr_debug("Unable to process APTPL metadata while" 2092 " active fabric exports exist\n"); 2093 return -EINVAL; 2094 } 2095 2096 opts = kstrdup(page, GFP_KERNEL); 2097 if (!opts) 2098 return -ENOMEM; 2099 2100 orig = opts; 2101 while ((ptr = strsep(&opts, ",\n")) != NULL) { 2102 if (!*ptr) 2103 continue; 2104 2105 token = match_token(ptr, tokens, args); 2106 switch (token) { 2107 case Opt_initiator_fabric: 2108 i_fabric = match_strdup(args); 2109 if (!i_fabric) { 2110 ret = -ENOMEM; 2111 goto out; 2112 } 2113 break; 2114 case Opt_initiator_node: 2115 i_port = match_strdup(args); 2116 if (!i_port) { 2117 ret = -ENOMEM; 2118 goto out; 2119 } 2120 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 2121 pr_err("APTPL metadata initiator_node=" 2122 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 2123 PR_APTPL_MAX_IPORT_LEN); 2124 ret = -EINVAL; 2125 break; 2126 } 2127 break; 2128 case Opt_initiator_sid: 2129 isid = match_strdup(args); 2130 if (!isid) { 2131 ret = -ENOMEM; 2132 goto out; 2133 } 2134 if (strlen(isid) >= PR_REG_ISID_LEN) { 2135 pr_err("APTPL metadata initiator_isid" 2136 "= exceeds PR_REG_ISID_LEN: %d\n", 2137 PR_REG_ISID_LEN); 2138 ret = -EINVAL; 2139 break; 2140 } 2141 break; 2142 case Opt_sa_res_key: 2143 ret = match_u64(args, &tmp_ll); 2144 if (ret < 0) { 2145 pr_err("kstrtoull() failed for sa_res_key=\n"); 2146 goto out; 2147 } 2148 sa_res_key = (u64)tmp_ll; 2149 break; 2150 /* 2151 * PR APTPL Metadata for Reservation 2152 */ 2153 case Opt_res_holder: 2154 ret = match_int(args, &arg); 2155 if (ret) 2156 goto out; 2157 res_holder = arg; 2158 break; 2159 case Opt_res_type: 2160 ret = match_int(args, &arg); 2161 if (ret) 2162 goto out; 2163 type = (u8)arg; 2164 break; 2165 case Opt_res_scope: 2166 ret = match_int(args, &arg); 2167 if (ret) 2168 goto out; 2169 break; 2170 case Opt_res_all_tg_pt: 2171 ret = match_int(args, &arg); 2172 if (ret) 2173 goto out; 2174 all_tg_pt = (int)arg; 2175 break; 2176 case Opt_mapped_lun: 2177 ret = match_u64(args, &tmp_ll); 2178 if (ret) 2179 goto out; 2180 mapped_lun = (u64)tmp_ll; 2181 break; 2182 /* 2183 * PR APTPL Metadata for Target Port 2184 */ 2185 case Opt_target_fabric: 2186 t_fabric = match_strdup(args); 2187 if (!t_fabric) { 2188 ret = -ENOMEM; 2189 goto out; 2190 } 2191 break; 2192 case Opt_target_node: 2193 t_port = match_strdup(args); 2194 if (!t_port) { 2195 ret = -ENOMEM; 2196 goto out; 2197 } 2198 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 2199 pr_err("APTPL metadata target_node=" 2200 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 2201 PR_APTPL_MAX_TPORT_LEN); 2202 ret = -EINVAL; 2203 break; 2204 } 2205 break; 2206 case Opt_tpgt: 2207 ret = match_int(args, &arg); 2208 if (ret) 2209 goto out; 2210 tpgt = (u16)arg; 2211 break; 2212 case Opt_port_rtpi: 2213 ret = match_int(args, &arg); 2214 if (ret) 2215 goto out; 2216 break; 2217 case Opt_target_lun: 2218 ret = match_u64(args, &tmp_ll); 2219 if (ret) 2220 goto out; 2221 target_lun = (u64)tmp_ll; 2222 break; 2223 default: 2224 break; 2225 } 2226 } 2227 2228 if (!i_port || !t_port || !sa_res_key) { 2229 pr_err("Illegal parameters for APTPL registration\n"); 2230 ret = -EINVAL; 2231 goto out; 2232 } 2233 2234 if (res_holder && !(type)) { 2235 pr_err("Illegal PR type: 0x%02x for reservation" 2236 " holder\n", type); 2237 ret = -EINVAL; 2238 goto out; 2239 } 2240 2241 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, 2242 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 2243 res_holder, all_tg_pt, type); 2244out: 2245 kfree(i_fabric); 2246 kfree(i_port); 2247 kfree(isid); 2248 kfree(t_fabric); 2249 kfree(t_port); 2250 kfree(orig); 2251 return (ret == 0) ? count : ret; 2252} 2253 2254 2255CONFIGFS_ATTR_RO(target_pr_, res_holder); 2256CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts); 2257CONFIGFS_ATTR_RO(target_pr_, res_pr_generation); 2258CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port); 2259CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts); 2260CONFIGFS_ATTR_RO(target_pr_, res_pr_type); 2261CONFIGFS_ATTR_RO(target_pr_, res_type); 2262CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active); 2263CONFIGFS_ATTR(target_pr_, res_aptpl_metadata); 2264 2265static struct configfs_attribute *target_core_dev_pr_attrs[] = { 2266 &target_pr_attr_res_holder, 2267 &target_pr_attr_res_pr_all_tgt_pts, 2268 &target_pr_attr_res_pr_generation, 2269 &target_pr_attr_res_pr_holder_tg_port, 2270 &target_pr_attr_res_pr_registered_i_pts, 2271 &target_pr_attr_res_pr_type, 2272 &target_pr_attr_res_type, 2273 &target_pr_attr_res_aptpl_active, 2274 &target_pr_attr_res_aptpl_metadata, 2275 NULL, 2276}; 2277 2278TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs); 2279 2280/* End functions for struct config_item_type tb_dev_pr_cit */ 2281 2282/* Start functions for struct config_item_type tb_dev_cit */ 2283 2284static inline struct se_device *to_device(struct config_item *item) 2285{ 2286 return container_of(to_config_group(item), struct se_device, dev_group); 2287} 2288 2289static ssize_t target_dev_info_show(struct config_item *item, char *page) 2290{ 2291 struct se_device *dev = to_device(item); 2292 int bl = 0; 2293 ssize_t read_bytes = 0; 2294 2295 transport_dump_dev_state(dev, page, &bl); 2296 read_bytes += bl; 2297 read_bytes += dev->transport->show_configfs_dev_params(dev, 2298 page+read_bytes); 2299 return read_bytes; 2300} 2301 2302static ssize_t target_dev_control_store(struct config_item *item, 2303 const char *page, size_t count) 2304{ 2305 struct se_device *dev = to_device(item); 2306 2307 return dev->transport->set_configfs_dev_params(dev, page, count); 2308} 2309 2310static ssize_t target_dev_alias_show(struct config_item *item, char *page) 2311{ 2312 struct se_device *dev = to_device(item); 2313 2314 if (!(dev->dev_flags & DF_USING_ALIAS)) 2315 return 0; 2316 2317 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); 2318} 2319 2320static ssize_t target_dev_alias_store(struct config_item *item, 2321 const char *page, size_t count) 2322{ 2323 struct se_device *dev = to_device(item); 2324 struct se_hba *hba = dev->se_hba; 2325 ssize_t read_bytes; 2326 2327 if (count > (SE_DEV_ALIAS_LEN-1)) { 2328 pr_err("alias count: %d exceeds" 2329 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 2330 SE_DEV_ALIAS_LEN-1); 2331 return -EINVAL; 2332 } 2333 2334 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); 2335 if (!read_bytes) 2336 return -EINVAL; 2337 if (dev->dev_alias[read_bytes - 1] == '\n') 2338 dev->dev_alias[read_bytes - 1] = '\0'; 2339 2340 dev->dev_flags |= DF_USING_ALIAS; 2341 2342 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 2343 config_item_name(&hba->hba_group.cg_item), 2344 config_item_name(&dev->dev_group.cg_item), 2345 dev->dev_alias); 2346 2347 return read_bytes; 2348} 2349 2350static ssize_t target_dev_udev_path_show(struct config_item *item, char *page) 2351{ 2352 struct se_device *dev = to_device(item); 2353 2354 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) 2355 return 0; 2356 2357 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); 2358} 2359 2360static ssize_t target_dev_udev_path_store(struct config_item *item, 2361 const char *page, size_t count) 2362{ 2363 struct se_device *dev = to_device(item); 2364 struct se_hba *hba = dev->se_hba; 2365 ssize_t read_bytes; 2366 2367 if (count > (SE_UDEV_PATH_LEN-1)) { 2368 pr_err("udev_path count: %d exceeds" 2369 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 2370 SE_UDEV_PATH_LEN-1); 2371 return -EINVAL; 2372 } 2373 2374 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, 2375 "%s", page); 2376 if (!read_bytes) 2377 return -EINVAL; 2378 if (dev->udev_path[read_bytes - 1] == '\n') 2379 dev->udev_path[read_bytes - 1] = '\0'; 2380 2381 dev->dev_flags |= DF_USING_UDEV_PATH; 2382 2383 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 2384 config_item_name(&hba->hba_group.cg_item), 2385 config_item_name(&dev->dev_group.cg_item), 2386 dev->udev_path); 2387 2388 return read_bytes; 2389} 2390 2391static ssize_t target_dev_enable_show(struct config_item *item, char *page) 2392{ 2393 struct se_device *dev = to_device(item); 2394 2395 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev)); 2396} 2397 2398static ssize_t target_dev_enable_store(struct config_item *item, 2399 const char *page, size_t count) 2400{ 2401 struct se_device *dev = to_device(item); 2402 char *ptr; 2403 int ret; 2404 2405 ptr = strstr(page, "1"); 2406 if (!ptr) { 2407 pr_err("For dev_enable ops, only valid value" 2408 " is \"1\"\n"); 2409 return -EINVAL; 2410 } 2411 2412 ret = target_configure_device(dev); 2413 if (ret) 2414 return ret; 2415 return count; 2416} 2417 2418static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page) 2419{ 2420 struct se_device *dev = to_device(item); 2421 struct config_item *lu_ci; 2422 struct t10_alua_lu_gp *lu_gp; 2423 struct t10_alua_lu_gp_member *lu_gp_mem; 2424 ssize_t len = 0; 2425 2426 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2427 if (!lu_gp_mem) 2428 return 0; 2429 2430 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2431 lu_gp = lu_gp_mem->lu_gp; 2432 if (lu_gp) { 2433 lu_ci = &lu_gp->lu_gp_group.cg_item; 2434 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 2435 config_item_name(lu_ci), lu_gp->lu_gp_id); 2436 } 2437 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2438 2439 return len; 2440} 2441 2442static ssize_t target_dev_alua_lu_gp_store(struct config_item *item, 2443 const char *page, size_t count) 2444{ 2445 struct se_device *dev = to_device(item); 2446 struct se_hba *hba = dev->se_hba; 2447 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 2448 struct t10_alua_lu_gp_member *lu_gp_mem; 2449 unsigned char buf[LU_GROUP_NAME_BUF] = { }; 2450 int move = 0; 2451 2452 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2453 if (!lu_gp_mem) 2454 return count; 2455 2456 if (count > LU_GROUP_NAME_BUF) { 2457 pr_err("ALUA LU Group Alias too large!\n"); 2458 return -EINVAL; 2459 } 2460 memcpy(buf, page, count); 2461 /* 2462 * Any ALUA logical unit alias besides "NULL" means we will be 2463 * making a new group association. 2464 */ 2465 if (strcmp(strstrip(buf), "NULL")) { 2466 /* 2467 * core_alua_get_lu_gp_by_name() will increment reference to 2468 * struct t10_alua_lu_gp. This reference is released with 2469 * core_alua_get_lu_gp_by_name below(). 2470 */ 2471 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 2472 if (!lu_gp_new) 2473 return -ENODEV; 2474 } 2475 2476 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2477 lu_gp = lu_gp_mem->lu_gp; 2478 if (lu_gp) { 2479 /* 2480 * Clearing an existing lu_gp association, and replacing 2481 * with NULL 2482 */ 2483 if (!lu_gp_new) { 2484 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 2485 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 2486 " %hu\n", 2487 config_item_name(&hba->hba_group.cg_item), 2488 config_item_name(&dev->dev_group.cg_item), 2489 config_item_name(&lu_gp->lu_gp_group.cg_item), 2490 lu_gp->lu_gp_id); 2491 2492 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2493 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2494 2495 return count; 2496 } 2497 /* 2498 * Removing existing association of lu_gp_mem with lu_gp 2499 */ 2500 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2501 move = 1; 2502 } 2503 /* 2504 * Associate lu_gp_mem with lu_gp_new. 2505 */ 2506 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 2507 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2508 2509 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 2510 " core/alua/lu_gps/%s, ID: %hu\n", 2511 (move) ? "Moving" : "Adding", 2512 config_item_name(&hba->hba_group.cg_item), 2513 config_item_name(&dev->dev_group.cg_item), 2514 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 2515 lu_gp_new->lu_gp_id); 2516 2517 core_alua_put_lu_gp_from_name(lu_gp_new); 2518 return count; 2519} 2520 2521static ssize_t target_dev_lba_map_show(struct config_item *item, char *page) 2522{ 2523 struct se_device *dev = to_device(item); 2524 struct t10_alua_lba_map *map; 2525 struct t10_alua_lba_map_member *mem; 2526 char *b = page; 2527 int bl = 0; 2528 char state; 2529 2530 spin_lock(&dev->t10_alua.lba_map_lock); 2531 if (!list_empty(&dev->t10_alua.lba_map_list)) 2532 bl += sprintf(b + bl, "%u %u\n", 2533 dev->t10_alua.lba_map_segment_size, 2534 dev->t10_alua.lba_map_segment_multiplier); 2535 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) { 2536 bl += sprintf(b + bl, "%llu %llu", 2537 map->lba_map_first_lba, map->lba_map_last_lba); 2538 list_for_each_entry(mem, &map->lba_map_mem_list, 2539 lba_map_mem_list) { 2540 switch (mem->lba_map_mem_alua_state) { 2541 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: 2542 state = 'O'; 2543 break; 2544 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: 2545 state = 'A'; 2546 break; 2547 case ALUA_ACCESS_STATE_STANDBY: 2548 state = 'S'; 2549 break; 2550 case ALUA_ACCESS_STATE_UNAVAILABLE: 2551 state = 'U'; 2552 break; 2553 default: 2554 state = '.'; 2555 break; 2556 } 2557 bl += sprintf(b + bl, " %d:%c", 2558 mem->lba_map_mem_alua_pg_id, state); 2559 } 2560 bl += sprintf(b + bl, "\n"); 2561 } 2562 spin_unlock(&dev->t10_alua.lba_map_lock); 2563 return bl; 2564} 2565 2566static ssize_t target_dev_lba_map_store(struct config_item *item, 2567 const char *page, size_t count) 2568{ 2569 struct se_device *dev = to_device(item); 2570 struct t10_alua_lba_map *lba_map = NULL; 2571 struct list_head lba_list; 2572 char *map_entries, *orig, *ptr; 2573 char state; 2574 int pg_num = -1, pg; 2575 int ret = 0, num = 0, pg_id, alua_state; 2576 unsigned long start_lba = -1, end_lba = -1; 2577 unsigned long segment_size = -1, segment_mult = -1; 2578 2579 orig = map_entries = kstrdup(page, GFP_KERNEL); 2580 if (!map_entries) 2581 return -ENOMEM; 2582 2583 INIT_LIST_HEAD(&lba_list); 2584 while ((ptr = strsep(&map_entries, "\n")) != NULL) { 2585 if (!*ptr) 2586 continue; 2587 2588 if (num == 0) { 2589 if (sscanf(ptr, "%lu %lu\n", 2590 &segment_size, &segment_mult) != 2) { 2591 pr_err("Invalid line %d\n", num); 2592 ret = -EINVAL; 2593 break; 2594 } 2595 num++; 2596 continue; 2597 } 2598 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) { 2599 pr_err("Invalid line %d\n", num); 2600 ret = -EINVAL; 2601 break; 2602 } 2603 ptr = strchr(ptr, ' '); 2604 if (!ptr) { 2605 pr_err("Invalid line %d, missing end lba\n", num); 2606 ret = -EINVAL; 2607 break; 2608 } 2609 ptr++; 2610 ptr = strchr(ptr, ' '); 2611 if (!ptr) { 2612 pr_err("Invalid line %d, missing state definitions\n", 2613 num); 2614 ret = -EINVAL; 2615 break; 2616 } 2617 ptr++; 2618 lba_map = core_alua_allocate_lba_map(&lba_list, 2619 start_lba, end_lba); 2620 if (IS_ERR(lba_map)) { 2621 ret = PTR_ERR(lba_map); 2622 break; 2623 } 2624 pg = 0; 2625 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) { 2626 switch (state) { 2627 case 'O': 2628 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED; 2629 break; 2630 case 'A': 2631 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED; 2632 break; 2633 case 'S': 2634 alua_state = ALUA_ACCESS_STATE_STANDBY; 2635 break; 2636 case 'U': 2637 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE; 2638 break; 2639 default: 2640 pr_err("Invalid ALUA state '%c'\n", state); 2641 ret = -EINVAL; 2642 goto out; 2643 } 2644 2645 ret = core_alua_allocate_lba_map_mem(lba_map, 2646 pg_id, alua_state); 2647 if (ret) { 2648 pr_err("Invalid target descriptor %d:%c " 2649 "at line %d\n", 2650 pg_id, state, num); 2651 break; 2652 } 2653 pg++; 2654 ptr = strchr(ptr, ' '); 2655 if (ptr) 2656 ptr++; 2657 else 2658 break; 2659 } 2660 if (pg_num == -1) 2661 pg_num = pg; 2662 else if (pg != pg_num) { 2663 pr_err("Only %d from %d port groups definitions " 2664 "at line %d\n", pg, pg_num, num); 2665 ret = -EINVAL; 2666 break; 2667 } 2668 num++; 2669 } 2670out: 2671 if (ret) { 2672 core_alua_free_lba_map(&lba_list); 2673 count = ret; 2674 } else 2675 core_alua_set_lba_map(dev, &lba_list, 2676 segment_size, segment_mult); 2677 kfree(orig); 2678 return count; 2679} 2680 2681CONFIGFS_ATTR_RO(target_dev_, info); 2682CONFIGFS_ATTR_WO(target_dev_, control); 2683CONFIGFS_ATTR(target_dev_, alias); 2684CONFIGFS_ATTR(target_dev_, udev_path); 2685CONFIGFS_ATTR(target_dev_, enable); 2686CONFIGFS_ATTR(target_dev_, alua_lu_gp); 2687CONFIGFS_ATTR(target_dev_, lba_map); 2688 2689static struct configfs_attribute *target_core_dev_attrs[] = { 2690 &target_dev_attr_info, 2691 &target_dev_attr_control, 2692 &target_dev_attr_alias, 2693 &target_dev_attr_udev_path, 2694 &target_dev_attr_enable, 2695 &target_dev_attr_alua_lu_gp, 2696 &target_dev_attr_lba_map, 2697 NULL, 2698}; 2699 2700static void target_core_dev_release(struct config_item *item) 2701{ 2702 struct config_group *dev_cg = to_config_group(item); 2703 struct se_device *dev = 2704 container_of(dev_cg, struct se_device, dev_group); 2705 2706 target_free_device(dev); 2707} 2708 2709/* 2710 * Used in target_core_fabric_configfs.c to verify valid se_device symlink 2711 * within target_fabric_port_link() 2712 */ 2713struct configfs_item_operations target_core_dev_item_ops = { 2714 .release = target_core_dev_release, 2715}; 2716 2717TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs); 2718 2719/* End functions for struct config_item_type tb_dev_cit */ 2720 2721/* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 2722 2723static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item) 2724{ 2725 return container_of(to_config_group(item), struct t10_alua_lu_gp, 2726 lu_gp_group); 2727} 2728 2729static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page) 2730{ 2731 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2732 2733 if (!lu_gp->lu_gp_valid_id) 2734 return 0; 2735 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2736} 2737 2738static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item, 2739 const char *page, size_t count) 2740{ 2741 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2742 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2743 unsigned long lu_gp_id; 2744 int ret; 2745 2746 ret = kstrtoul(page, 0, &lu_gp_id); 2747 if (ret < 0) { 2748 pr_err("kstrtoul() returned %d for" 2749 " lu_gp_id\n", ret); 2750 return ret; 2751 } 2752 if (lu_gp_id > 0x0000ffff) { 2753 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 2754 " 0x0000ffff\n", lu_gp_id); 2755 return -EINVAL; 2756 } 2757 2758 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2759 if (ret < 0) 2760 return -EINVAL; 2761 2762 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 2763 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2764 config_item_name(&alua_lu_gp_cg->cg_item), 2765 lu_gp->lu_gp_id); 2766 2767 return count; 2768} 2769 2770static ssize_t target_lu_gp_members_show(struct config_item *item, char *page) 2771{ 2772 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2773 struct t10_alua_lu_gp_member *lu_gp_mem; 2774 const char *const end = page + PAGE_SIZE; 2775 char *cur = page; 2776 2777 spin_lock(&lu_gp->lu_gp_lock); 2778 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2779 struct se_device *dev = lu_gp_mem->lu_gp_mem_dev; 2780 struct se_hba *hba = dev->se_hba; 2781 2782 cur += scnprintf(cur, end - cur, "%s/%s\n", 2783 config_item_name(&hba->hba_group.cg_item), 2784 config_item_name(&dev->dev_group.cg_item)); 2785 if (WARN_ON_ONCE(cur >= end)) 2786 break; 2787 } 2788 spin_unlock(&lu_gp->lu_gp_lock); 2789 2790 return cur - page; 2791} 2792 2793CONFIGFS_ATTR(target_lu_gp_, lu_gp_id); 2794CONFIGFS_ATTR_RO(target_lu_gp_, members); 2795 2796static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2797 &target_lu_gp_attr_lu_gp_id, 2798 &target_lu_gp_attr_members, 2799 NULL, 2800}; 2801 2802static void target_core_alua_lu_gp_release(struct config_item *item) 2803{ 2804 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2805 struct t10_alua_lu_gp, lu_gp_group); 2806 2807 core_alua_free_lu_gp(lu_gp); 2808} 2809 2810static struct configfs_item_operations target_core_alua_lu_gp_ops = { 2811 .release = target_core_alua_lu_gp_release, 2812}; 2813 2814static const struct config_item_type target_core_alua_lu_gp_cit = { 2815 .ct_item_ops = &target_core_alua_lu_gp_ops, 2816 .ct_attrs = target_core_alua_lu_gp_attrs, 2817 .ct_owner = THIS_MODULE, 2818}; 2819 2820/* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2821 2822/* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2823 2824static struct config_group *target_core_alua_create_lu_gp( 2825 struct config_group *group, 2826 const char *name) 2827{ 2828 struct t10_alua_lu_gp *lu_gp; 2829 struct config_group *alua_lu_gp_cg = NULL; 2830 struct config_item *alua_lu_gp_ci = NULL; 2831 2832 lu_gp = core_alua_allocate_lu_gp(name, 0); 2833 if (IS_ERR(lu_gp)) 2834 return NULL; 2835 2836 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2837 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2838 2839 config_group_init_type_name(alua_lu_gp_cg, name, 2840 &target_core_alua_lu_gp_cit); 2841 2842 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2843 " Group: core/alua/lu_gps/%s\n", 2844 config_item_name(alua_lu_gp_ci)); 2845 2846 return alua_lu_gp_cg; 2847 2848} 2849 2850static void target_core_alua_drop_lu_gp( 2851 struct config_group *group, 2852 struct config_item *item) 2853{ 2854 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2855 struct t10_alua_lu_gp, lu_gp_group); 2856 2857 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2858 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2859 config_item_name(item), lu_gp->lu_gp_id); 2860 /* 2861 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 2862 * -> target_core_alua_lu_gp_release() 2863 */ 2864 config_item_put(item); 2865} 2866 2867static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2868 .make_group = &target_core_alua_create_lu_gp, 2869 .drop_item = &target_core_alua_drop_lu_gp, 2870}; 2871 2872static const struct config_item_type target_core_alua_lu_gps_cit = { 2873 .ct_item_ops = NULL, 2874 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2875 .ct_owner = THIS_MODULE, 2876}; 2877 2878/* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2879 2880/* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2881 2882static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item) 2883{ 2884 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp, 2885 tg_pt_gp_group); 2886} 2887 2888static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item, 2889 char *page) 2890{ 2891 return sprintf(page, "%d\n", 2892 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state); 2893} 2894 2895static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item, 2896 const char *page, size_t count) 2897{ 2898 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2899 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; 2900 unsigned long tmp; 2901 int new_state, ret; 2902 2903 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2904 pr_err("Unable to do implicit ALUA on invalid tg_pt_gp ID\n"); 2905 return -EINVAL; 2906 } 2907 if (!target_dev_configured(dev)) { 2908 pr_err("Unable to set alua_access_state while device is" 2909 " not configured\n"); 2910 return -ENODEV; 2911 } 2912 2913 ret = kstrtoul(page, 0, &tmp); 2914 if (ret < 0) { 2915 pr_err("Unable to extract new ALUA access state from" 2916 " %s\n", page); 2917 return ret; 2918 } 2919 new_state = (int)tmp; 2920 2921 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) { 2922 pr_err("Unable to process implicit configfs ALUA" 2923 " transition while TPGS_IMPLICIT_ALUA is disabled\n"); 2924 return -EINVAL; 2925 } 2926 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA && 2927 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) { 2928 /* LBA DEPENDENT is only allowed with implicit ALUA */ 2929 pr_err("Unable to process implicit configfs ALUA transition" 2930 " while explicit ALUA management is enabled\n"); 2931 return -EINVAL; 2932 } 2933 2934 ret = core_alua_do_port_transition(tg_pt_gp, dev, 2935 NULL, NULL, new_state, 0); 2936 return (!ret) ? count : -EINVAL; 2937} 2938 2939static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item, 2940 char *page) 2941{ 2942 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2943 return sprintf(page, "%s\n", 2944 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2945} 2946 2947static ssize_t target_tg_pt_gp_alua_access_status_store( 2948 struct config_item *item, const char *page, size_t count) 2949{ 2950 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2951 unsigned long tmp; 2952 int new_status, ret; 2953 2954 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2955 pr_err("Unable to set ALUA access status on invalid tg_pt_gp ID\n"); 2956 return -EINVAL; 2957 } 2958 2959 ret = kstrtoul(page, 0, &tmp); 2960 if (ret < 0) { 2961 pr_err("Unable to extract new ALUA access status" 2962 " from %s\n", page); 2963 return ret; 2964 } 2965 new_status = (int)tmp; 2966 2967 if ((new_status != ALUA_STATUS_NONE) && 2968 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && 2969 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { 2970 pr_err("Illegal ALUA access status: 0x%02x\n", 2971 new_status); 2972 return -EINVAL; 2973 } 2974 2975 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2976 return count; 2977} 2978 2979static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item, 2980 char *page) 2981{ 2982 return core_alua_show_access_type(to_tg_pt_gp(item), page); 2983} 2984 2985static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item, 2986 const char *page, size_t count) 2987{ 2988 return core_alua_store_access_type(to_tg_pt_gp(item), page, count); 2989} 2990 2991#define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \ 2992static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \ 2993 struct config_item *item, char *p) \ 2994{ \ 2995 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 2996 return sprintf(p, "%d\n", \ 2997 !!(t->tg_pt_gp_alua_supported_states & _bit)); \ 2998} \ 2999 \ 3000static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \ 3001 struct config_item *item, const char *p, size_t c) \ 3002{ \ 3003 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 3004 unsigned long tmp; \ 3005 int ret; \ 3006 \ 3007 if (!t->tg_pt_gp_valid_id) { \ 3008 pr_err("Unable to set " #_name " ALUA state on invalid tg_pt_gp ID\n"); \ 3009 return -EINVAL; \ 3010 } \ 3011 \ 3012 ret = kstrtoul(p, 0, &tmp); \ 3013 if (ret < 0) { \ 3014 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \ 3015 return -EINVAL; \ 3016 } \ 3017 if (tmp > 1) { \ 3018 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \ 3019 return -EINVAL; \ 3020 } \ 3021 if (tmp) \ 3022 t->tg_pt_gp_alua_supported_states |= _bit; \ 3023 else \ 3024 t->tg_pt_gp_alua_supported_states &= ~_bit; \ 3025 \ 3026 return c; \ 3027} 3028 3029ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP); 3030ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP); 3031ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP); 3032ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP); 3033ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP); 3034ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP); 3035ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP); 3036 3037static ssize_t target_tg_pt_gp_alua_write_metadata_show( 3038 struct config_item *item, char *page) 3039{ 3040 return sprintf(page, "%d\n", 3041 to_tg_pt_gp(item)->tg_pt_gp_write_metadata); 3042} 3043 3044static ssize_t target_tg_pt_gp_alua_write_metadata_store( 3045 struct config_item *item, const char *page, size_t count) 3046{ 3047 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3048 unsigned long tmp; 3049 int ret; 3050 3051 ret = kstrtoul(page, 0, &tmp); 3052 if (ret < 0) { 3053 pr_err("Unable to extract alua_write_metadata\n"); 3054 return ret; 3055 } 3056 3057 if ((tmp != 0) && (tmp != 1)) { 3058 pr_err("Illegal value for alua_write_metadata:" 3059 " %lu\n", tmp); 3060 return -EINVAL; 3061 } 3062 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 3063 3064 return count; 3065} 3066 3067static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item, 3068 char *page) 3069{ 3070 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page); 3071} 3072 3073static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item, 3074 const char *page, size_t count) 3075{ 3076 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page, 3077 count); 3078} 3079 3080static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item, 3081 char *page) 3082{ 3083 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page); 3084} 3085 3086static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item, 3087 const char *page, size_t count) 3088{ 3089 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page, 3090 count); 3091} 3092 3093static ssize_t target_tg_pt_gp_implicit_trans_secs_show( 3094 struct config_item *item, char *page) 3095{ 3096 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page); 3097} 3098 3099static ssize_t target_tg_pt_gp_implicit_trans_secs_store( 3100 struct config_item *item, const char *page, size_t count) 3101{ 3102 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page, 3103 count); 3104} 3105 3106static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item, 3107 char *page) 3108{ 3109 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page); 3110} 3111 3112static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item, 3113 const char *page, size_t count) 3114{ 3115 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count); 3116} 3117 3118static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item, 3119 char *page) 3120{ 3121 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3122 3123 if (!tg_pt_gp->tg_pt_gp_valid_id) 3124 return 0; 3125 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 3126} 3127 3128static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item, 3129 const char *page, size_t count) 3130{ 3131 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3132 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 3133 unsigned long tg_pt_gp_id; 3134 int ret; 3135 3136 ret = kstrtoul(page, 0, &tg_pt_gp_id); 3137 if (ret < 0) { 3138 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n", 3139 page); 3140 return ret; 3141 } 3142 if (tg_pt_gp_id > 0x0000ffff) { 3143 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n", 3144 tg_pt_gp_id); 3145 return -EINVAL; 3146 } 3147 3148 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 3149 if (ret < 0) 3150 return -EINVAL; 3151 3152 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 3153 "core/alua/tg_pt_gps/%s to ID: %hu\n", 3154 config_item_name(&alua_tg_pt_gp_cg->cg_item), 3155 tg_pt_gp->tg_pt_gp_id); 3156 3157 return count; 3158} 3159 3160static ssize_t target_tg_pt_gp_members_show(struct config_item *item, 3161 char *page) 3162{ 3163 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3164 struct se_lun *lun; 3165 ssize_t len = 0, cur_len; 3166 unsigned char buf[TG_PT_GROUP_NAME_BUF] = { }; 3167 3168 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 3169 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, 3170 lun_tg_pt_gp_link) { 3171 struct se_portal_group *tpg = lun->lun_tpg; 3172 3173 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 3174 "/%s\n", tpg->se_tpg_tfo->fabric_name, 3175 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 3176 tpg->se_tpg_tfo->tpg_get_tag(tpg), 3177 config_item_name(&lun->lun_group.cg_item)); 3178 cur_len++; /* Extra byte for NULL terminator */ 3179 3180 if ((cur_len + len) > PAGE_SIZE) { 3181 pr_warn("Ran out of lu_gp_show_attr" 3182 "_members buffer\n"); 3183 break; 3184 } 3185 memcpy(page+len, buf, cur_len); 3186 len += cur_len; 3187 } 3188 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 3189 3190 return len; 3191} 3192 3193CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state); 3194CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status); 3195CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type); 3196CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning); 3197CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline); 3198CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent); 3199CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable); 3200CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby); 3201CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized); 3202CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized); 3203CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata); 3204CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs); 3205CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs); 3206CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs); 3207CONFIGFS_ATTR(target_tg_pt_gp_, preferred); 3208CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id); 3209CONFIGFS_ATTR_RO(target_tg_pt_gp_, members); 3210 3211static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 3212 &target_tg_pt_gp_attr_alua_access_state, 3213 &target_tg_pt_gp_attr_alua_access_status, 3214 &target_tg_pt_gp_attr_alua_access_type, 3215 &target_tg_pt_gp_attr_alua_support_transitioning, 3216 &target_tg_pt_gp_attr_alua_support_offline, 3217 &target_tg_pt_gp_attr_alua_support_lba_dependent, 3218 &target_tg_pt_gp_attr_alua_support_unavailable, 3219 &target_tg_pt_gp_attr_alua_support_standby, 3220 &target_tg_pt_gp_attr_alua_support_active_nonoptimized, 3221 &target_tg_pt_gp_attr_alua_support_active_optimized, 3222 &target_tg_pt_gp_attr_alua_write_metadata, 3223 &target_tg_pt_gp_attr_nonop_delay_msecs, 3224 &target_tg_pt_gp_attr_trans_delay_msecs, 3225 &target_tg_pt_gp_attr_implicit_trans_secs, 3226 &target_tg_pt_gp_attr_preferred, 3227 &target_tg_pt_gp_attr_tg_pt_gp_id, 3228 &target_tg_pt_gp_attr_members, 3229 NULL, 3230}; 3231 3232static void target_core_alua_tg_pt_gp_release(struct config_item *item) 3233{ 3234 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3235 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3236 3237 core_alua_free_tg_pt_gp(tg_pt_gp); 3238} 3239 3240static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 3241 .release = target_core_alua_tg_pt_gp_release, 3242}; 3243 3244static const struct config_item_type target_core_alua_tg_pt_gp_cit = { 3245 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 3246 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 3247 .ct_owner = THIS_MODULE, 3248}; 3249 3250/* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 3251 3252/* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3253 3254static struct config_group *target_core_alua_create_tg_pt_gp( 3255 struct config_group *group, 3256 const char *name) 3257{ 3258 struct t10_alua *alua = container_of(group, struct t10_alua, 3259 alua_tg_pt_gps_group); 3260 struct t10_alua_tg_pt_gp *tg_pt_gp; 3261 struct config_group *alua_tg_pt_gp_cg = NULL; 3262 struct config_item *alua_tg_pt_gp_ci = NULL; 3263 3264 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0); 3265 if (!tg_pt_gp) 3266 return NULL; 3267 3268 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 3269 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 3270 3271 config_group_init_type_name(alua_tg_pt_gp_cg, name, 3272 &target_core_alua_tg_pt_gp_cit); 3273 3274 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 3275 " Group: alua/tg_pt_gps/%s\n", 3276 config_item_name(alua_tg_pt_gp_ci)); 3277 3278 return alua_tg_pt_gp_cg; 3279} 3280 3281static void target_core_alua_drop_tg_pt_gp( 3282 struct config_group *group, 3283 struct config_item *item) 3284{ 3285 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3286 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3287 3288 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 3289 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 3290 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 3291 /* 3292 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 3293 * -> target_core_alua_tg_pt_gp_release(). 3294 */ 3295 config_item_put(item); 3296} 3297 3298static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 3299 .make_group = &target_core_alua_create_tg_pt_gp, 3300 .drop_item = &target_core_alua_drop_tg_pt_gp, 3301}; 3302 3303TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL); 3304 3305/* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3306 3307/* Start functions for struct config_item_type target_core_alua_cit */ 3308 3309/* 3310 * target_core_alua_cit is a ConfigFS group that lives under 3311 * /sys/kernel/config/target/core/alua. There are default groups 3312 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 3313 * target_core_alua_cit in target_core_init_configfs() below. 3314 */ 3315static const struct config_item_type target_core_alua_cit = { 3316 .ct_item_ops = NULL, 3317 .ct_attrs = NULL, 3318 .ct_owner = THIS_MODULE, 3319}; 3320 3321/* End functions for struct config_item_type target_core_alua_cit */ 3322 3323/* Start functions for struct config_item_type tb_dev_stat_cit */ 3324 3325static struct config_group *target_core_stat_mkdir( 3326 struct config_group *group, 3327 const char *name) 3328{ 3329 return ERR_PTR(-ENOSYS); 3330} 3331 3332static void target_core_stat_rmdir( 3333 struct config_group *group, 3334 struct config_item *item) 3335{ 3336 return; 3337} 3338 3339static struct configfs_group_operations target_core_stat_group_ops = { 3340 .make_group = &target_core_stat_mkdir, 3341 .drop_item = &target_core_stat_rmdir, 3342}; 3343 3344TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL); 3345 3346/* End functions for struct config_item_type tb_dev_stat_cit */ 3347 3348/* Start functions for struct config_item_type target_core_hba_cit */ 3349 3350static struct config_group *target_core_make_subdev( 3351 struct config_group *group, 3352 const char *name) 3353{ 3354 struct t10_alua_tg_pt_gp *tg_pt_gp; 3355 struct config_item *hba_ci = &group->cg_item; 3356 struct se_hba *hba = item_to_hba(hba_ci); 3357 struct target_backend *tb = hba->backend; 3358 struct se_device *dev; 3359 int errno = -ENOMEM, ret; 3360 3361 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 3362 if (ret) 3363 return ERR_PTR(ret); 3364 3365 dev = target_alloc_device(hba, name); 3366 if (!dev) 3367 goto out_unlock; 3368 3369 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit); 3370 3371 config_group_init_type_name(&dev->dev_action_group, "action", 3372 &tb->tb_dev_action_cit); 3373 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group); 3374 3375 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib", 3376 &tb->tb_dev_attrib_cit); 3377 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group); 3378 3379 config_group_init_type_name(&dev->dev_pr_group, "pr", 3380 &tb->tb_dev_pr_cit); 3381 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group); 3382 3383 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn", 3384 &tb->tb_dev_wwn_cit); 3385 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group, 3386 &dev->dev_group); 3387 3388 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group, 3389 "alua", &tb->tb_dev_alua_tg_pt_gps_cit); 3390 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group, 3391 &dev->dev_group); 3392 3393 config_group_init_type_name(&dev->dev_stat_grps.stat_group, 3394 "statistics", &tb->tb_dev_stat_cit); 3395 configfs_add_default_group(&dev->dev_stat_grps.stat_group, 3396 &dev->dev_group); 3397 3398 /* 3399 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 3400 */ 3401 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1); 3402 if (!tg_pt_gp) 3403 goto out_free_device; 3404 dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 3405 3406 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 3407 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 3408 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group, 3409 &dev->t10_alua.alua_tg_pt_gps_group); 3410 3411 /* 3412 * Add core/$HBA/$DEV/statistics/ default groups 3413 */ 3414 target_stat_setup_dev_default_groups(dev); 3415 3416 mutex_lock(&target_devices_lock); 3417 target_devices++; 3418 mutex_unlock(&target_devices_lock); 3419 3420 mutex_unlock(&hba->hba_access_mutex); 3421 return &dev->dev_group; 3422 3423out_free_device: 3424 target_free_device(dev); 3425out_unlock: 3426 mutex_unlock(&hba->hba_access_mutex); 3427 return ERR_PTR(errno); 3428} 3429 3430static void target_core_drop_subdev( 3431 struct config_group *group, 3432 struct config_item *item) 3433{ 3434 struct config_group *dev_cg = to_config_group(item); 3435 struct se_device *dev = 3436 container_of(dev_cg, struct se_device, dev_group); 3437 struct se_hba *hba; 3438 3439 hba = item_to_hba(&dev->se_hba->hba_group.cg_item); 3440 3441 mutex_lock(&hba->hba_access_mutex); 3442 3443 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group); 3444 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group); 3445 3446 /* 3447 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 3448 * directly from target_core_alua_tg_pt_gp_release(). 3449 */ 3450 dev->t10_alua.default_tg_pt_gp = NULL; 3451 3452 configfs_remove_default_groups(dev_cg); 3453 3454 /* 3455 * se_dev is released from target_core_dev_item_ops->release() 3456 */ 3457 config_item_put(item); 3458 3459 mutex_lock(&target_devices_lock); 3460 target_devices--; 3461 mutex_unlock(&target_devices_lock); 3462 3463 mutex_unlock(&hba->hba_access_mutex); 3464} 3465 3466static struct configfs_group_operations target_core_hba_group_ops = { 3467 .make_group = target_core_make_subdev, 3468 .drop_item = target_core_drop_subdev, 3469}; 3470 3471 3472static inline struct se_hba *to_hba(struct config_item *item) 3473{ 3474 return container_of(to_config_group(item), struct se_hba, hba_group); 3475} 3476 3477static ssize_t target_hba_info_show(struct config_item *item, char *page) 3478{ 3479 struct se_hba *hba = to_hba(item); 3480 3481 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 3482 hba->hba_id, hba->backend->ops->name, 3483 TARGET_CORE_VERSION); 3484} 3485 3486static ssize_t target_hba_mode_show(struct config_item *item, char *page) 3487{ 3488 struct se_hba *hba = to_hba(item); 3489 int hba_mode = 0; 3490 3491 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 3492 hba_mode = 1; 3493 3494 return sprintf(page, "%d\n", hba_mode); 3495} 3496 3497static ssize_t target_hba_mode_store(struct config_item *item, 3498 const char *page, size_t count) 3499{ 3500 struct se_hba *hba = to_hba(item); 3501 unsigned long mode_flag; 3502 int ret; 3503 3504 if (hba->backend->ops->pmode_enable_hba == NULL) 3505 return -EINVAL; 3506 3507 ret = kstrtoul(page, 0, &mode_flag); 3508 if (ret < 0) { 3509 pr_err("Unable to extract hba mode flag: %d\n", ret); 3510 return ret; 3511 } 3512 3513 if (hba->dev_count) { 3514 pr_err("Unable to set hba_mode with active devices\n"); 3515 return -EINVAL; 3516 } 3517 3518 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag); 3519 if (ret < 0) 3520 return -EINVAL; 3521 if (ret > 0) 3522 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 3523 else if (ret == 0) 3524 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 3525 3526 return count; 3527} 3528 3529CONFIGFS_ATTR_RO(target_, hba_info); 3530CONFIGFS_ATTR(target_, hba_mode); 3531 3532static void target_core_hba_release(struct config_item *item) 3533{ 3534 struct se_hba *hba = container_of(to_config_group(item), 3535 struct se_hba, hba_group); 3536 core_delete_hba(hba); 3537} 3538 3539static struct configfs_attribute *target_core_hba_attrs[] = { 3540 &target_attr_hba_info, 3541 &target_attr_hba_mode, 3542 NULL, 3543}; 3544 3545static struct configfs_item_operations target_core_hba_item_ops = { 3546 .release = target_core_hba_release, 3547}; 3548 3549static const struct config_item_type target_core_hba_cit = { 3550 .ct_item_ops = &target_core_hba_item_ops, 3551 .ct_group_ops = &target_core_hba_group_ops, 3552 .ct_attrs = target_core_hba_attrs, 3553 .ct_owner = THIS_MODULE, 3554}; 3555 3556static struct config_group *target_core_call_addhbatotarget( 3557 struct config_group *group, 3558 const char *name) 3559{ 3560 char *se_plugin_str, *str, *str2; 3561 struct se_hba *hba; 3562 char buf[TARGET_CORE_NAME_MAX_LEN] = { }; 3563 unsigned long plugin_dep_id = 0; 3564 int ret; 3565 3566 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 3567 pr_err("Passed *name strlen(): %d exceeds" 3568 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 3569 TARGET_CORE_NAME_MAX_LEN); 3570 return ERR_PTR(-ENAMETOOLONG); 3571 } 3572 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 3573 3574 str = strstr(buf, "_"); 3575 if (!str) { 3576 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 3577 return ERR_PTR(-EINVAL); 3578 } 3579 se_plugin_str = buf; 3580 /* 3581 * Special case for subsystem plugins that have "_" in their names. 3582 * Namely rd_direct and rd_mcp.. 3583 */ 3584 str2 = strstr(str+1, "_"); 3585 if (str2) { 3586 *str2 = '\0'; /* Terminate for *se_plugin_str */ 3587 str2++; /* Skip to start of plugin dependent ID */ 3588 str = str2; 3589 } else { 3590 *str = '\0'; /* Terminate for *se_plugin_str */ 3591 str++; /* Skip to start of plugin dependent ID */ 3592 } 3593 3594 ret = kstrtoul(str, 0, &plugin_dep_id); 3595 if (ret < 0) { 3596 pr_err("kstrtoul() returned %d for" 3597 " plugin_dep_id\n", ret); 3598 return ERR_PTR(ret); 3599 } 3600 /* 3601 * Load up TCM subsystem plugins if they have not already been loaded. 3602 */ 3603 transport_subsystem_check_init(); 3604 3605 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 3606 if (IS_ERR(hba)) 3607 return ERR_CAST(hba); 3608 3609 config_group_init_type_name(&hba->hba_group, name, 3610 &target_core_hba_cit); 3611 3612 return &hba->hba_group; 3613} 3614 3615static void target_core_call_delhbafromtarget( 3616 struct config_group *group, 3617 struct config_item *item) 3618{ 3619 /* 3620 * core_delete_hba() is called from target_core_hba_item_ops->release() 3621 * -> target_core_hba_release() 3622 */ 3623 config_item_put(item); 3624} 3625 3626static struct configfs_group_operations target_core_group_ops = { 3627 .make_group = target_core_call_addhbatotarget, 3628 .drop_item = target_core_call_delhbafromtarget, 3629}; 3630 3631static const struct config_item_type target_core_cit = { 3632 .ct_item_ops = NULL, 3633 .ct_group_ops = &target_core_group_ops, 3634 .ct_attrs = NULL, 3635 .ct_owner = THIS_MODULE, 3636}; 3637 3638/* Stop functions for struct config_item_type target_core_hba_cit */ 3639 3640void target_setup_backend_cits(struct target_backend *tb) 3641{ 3642 target_core_setup_dev_cit(tb); 3643 target_core_setup_dev_action_cit(tb); 3644 target_core_setup_dev_attrib_cit(tb); 3645 target_core_setup_dev_pr_cit(tb); 3646 target_core_setup_dev_wwn_cit(tb); 3647 target_core_setup_dev_alua_tg_pt_gps_cit(tb); 3648 target_core_setup_dev_stat_cit(tb); 3649} 3650 3651static void target_init_dbroot(void) 3652{ 3653 struct file *fp; 3654 3655 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED); 3656 fp = filp_open(db_root_stage, O_RDONLY, 0); 3657 if (IS_ERR(fp)) { 3658 pr_err("db_root: cannot open: %s\n", db_root_stage); 3659 return; 3660 } 3661 if (!S_ISDIR(file_inode(fp)->i_mode)) { 3662 filp_close(fp, NULL); 3663 pr_err("db_root: not a valid directory: %s\n", db_root_stage); 3664 return; 3665 } 3666 filp_close(fp, NULL); 3667 3668 strscpy(db_root, db_root_stage); 3669 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); 3670} 3671 3672static int __init target_core_init_configfs(void) 3673{ 3674 struct configfs_subsystem *subsys = &target_core_fabrics; 3675 struct t10_alua_lu_gp *lu_gp; 3676 int ret; 3677 3678 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 3679 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3680 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3681 3682 config_group_init(&subsys->su_group); 3683 mutex_init(&subsys->su_mutex); 3684 3685 ret = init_se_kmem_caches(); 3686 if (ret < 0) 3687 return ret; 3688 /* 3689 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3690 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3691 */ 3692 config_group_init_type_name(&target_core_hbagroup, "core", 3693 &target_core_cit); 3694 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group); 3695 3696 /* 3697 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3698 */ 3699 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit); 3700 configfs_add_default_group(&alua_group, &target_core_hbagroup); 3701 3702 /* 3703 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3704 * groups under /sys/kernel/config/target/core/alua/ 3705 */ 3706 config_group_init_type_name(&alua_lu_gps_group, "lu_gps", 3707 &target_core_alua_lu_gps_cit); 3708 configfs_add_default_group(&alua_lu_gps_group, &alua_group); 3709 3710 /* 3711 * Add core/alua/lu_gps/default_lu_gp 3712 */ 3713 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3714 if (IS_ERR(lu_gp)) { 3715 ret = -ENOMEM; 3716 goto out_global; 3717 } 3718 3719 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3720 &target_core_alua_lu_gp_cit); 3721 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group); 3722 3723 default_lu_gp = lu_gp; 3724 3725 /* 3726 * Register the target_core_mod subsystem with configfs. 3727 */ 3728 ret = configfs_register_subsystem(subsys); 3729 if (ret < 0) { 3730 pr_err("Error %d while registering subsystem %s\n", 3731 ret, subsys->su_group.cg_item.ci_namebuf); 3732 goto out_global; 3733 } 3734 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 3735 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s" 3736 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3737 /* 3738 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3739 */ 3740 ret = rd_module_init(); 3741 if (ret < 0) 3742 goto out; 3743 3744 ret = core_dev_setup_virtual_lun0(); 3745 if (ret < 0) 3746 goto out; 3747 3748 ret = target_xcopy_setup_pt(); 3749 if (ret < 0) 3750 goto out; 3751 3752 scoped_with_kernel_creds() 3753 target_init_dbroot(); 3754 3755 return 0; 3756 3757out: 3758 target_xcopy_release_pt(); 3759 configfs_unregister_subsystem(subsys); 3760 core_dev_release_virtual_lun0(); 3761 rd_module_exit(); 3762out_global: 3763 if (default_lu_gp) { 3764 core_alua_free_lu_gp(default_lu_gp); 3765 default_lu_gp = NULL; 3766 } 3767 release_se_kmem_caches(); 3768 return ret; 3769} 3770 3771static void __exit target_core_exit_configfs(void) 3772{ 3773 configfs_remove_default_groups(&alua_lu_gps_group); 3774 configfs_remove_default_groups(&alua_group); 3775 configfs_remove_default_groups(&target_core_hbagroup); 3776 3777 /* 3778 * We expect subsys->su_group.default_groups to be released 3779 * by configfs subsystem provider logic.. 3780 */ 3781 configfs_unregister_subsystem(&target_core_fabrics); 3782 3783 core_alua_free_lu_gp(default_lu_gp); 3784 default_lu_gp = NULL; 3785 3786 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3787 " Infrastructure\n"); 3788 3789 core_dev_release_virtual_lun0(); 3790 rd_module_exit(); 3791 target_xcopy_release_pt(); 3792 release_se_kmem_caches(); 3793} 3794 3795MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3796MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3797MODULE_LICENSE("GPL"); 3798 3799module_init(target_core_init_configfs); 3800module_exit(target_core_exit_configfs);
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