1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /******************************************************************************* 3 * Filename: target_core_configfs.c 4 * 5 * This file contains ConfigFS logic for the Generic Target Engine project. 6 * 7 * (c) Copyright 2008-2013 Datera, Inc. 8 * 9 * Nicholas A. Bellinger <nab@kernel.org> 10 * 11 * based on configfs Copyright (C) 2005 Oracle. All rights reserved. 12 * 13 ****************************************************************************/ 14 15 #include <linux/kstrtox.h> 16 #include <linux/module.h> 17 #include <linux/moduleparam.h> 18 #include <generated/utsrelease.h> 19 #include <linux/utsname.h> 20 #include <linux/init.h> 21 #include <linux/fs.h> 22 #include <linux/namei.h> 23 #include <linux/slab.h> 24 #include <linux/types.h> 25 #include <linux/delay.h> 26 #include <linux/unistd.h> 27 #include <linux/string.h> 28 #include <linux/parser.h> 29 #include <linux/syscalls.h> 30 #include <linux/configfs.h> 31 #include <linux/spinlock.h> 32 33 #include <target/target_core_base.h> 34 #include <target/target_core_backend.h> 35 #include <target/target_core_fabric.h> 36 37 #include "target_core_internal.h" 38 #include "target_core_alua.h" 39 #include "target_core_pr.h" 40 #include "target_core_rd.h" 41 #include "target_core_xcopy.h" 42 43 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \ 44 static void target_core_setup_##_name##_cit(struct target_backend *tb) \ 45 { \ 46 struct config_item_type *cit = &tb->tb_##_name##_cit; \ 47 \ 48 cit->ct_item_ops = _item_ops; \ 49 cit->ct_group_ops = _group_ops; \ 50 cit->ct_attrs = _attrs; \ 51 cit->ct_owner = tb->ops->owner; \ 52 pr_debug("Setup generic %s\n", __stringify(_name)); \ 53 } 54 55 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \ 56 static void target_core_setup_##_name##_cit(struct target_backend *tb) \ 57 { \ 58 struct config_item_type *cit = &tb->tb_##_name##_cit; \ 59 \ 60 cit->ct_item_ops = _item_ops; \ 61 cit->ct_group_ops = _group_ops; \ 62 cit->ct_attrs = tb->ops->tb_##_name##_attrs; \ 63 cit->ct_owner = tb->ops->owner; \ 64 pr_debug("Setup generic %s\n", __stringify(_name)); \ 65 } 66 67 extern struct t10_alua_lu_gp *default_lu_gp; 68 69 static LIST_HEAD(g_tf_list); 70 static DEFINE_MUTEX(g_tf_lock); 71 72 static struct config_group target_core_hbagroup; 73 static struct config_group alua_group; 74 static struct config_group alua_lu_gps_group; 75 76 static unsigned int target_devices; 77 static DEFINE_MUTEX(target_devices_lock); 78 79 static inline struct se_hba * 80 item_to_hba(struct config_item *item) 81 { 82 return container_of(to_config_group(item), struct se_hba, hba_group); 83 } 84 85 /* 86 * Attributes for /sys/kernel/config/target/ 87 */ 88 static ssize_t target_core_item_version_show(struct config_item *item, 89 char *page) 90 { 91 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s" 92 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION, 93 utsname()->sysname, utsname()->machine); 94 } 95 96 CONFIGFS_ATTR_RO(target_core_item_, version); 97 98 char db_root[DB_ROOT_LEN] = DB_ROOT_DEFAULT; 99 static char db_root_stage[DB_ROOT_LEN]; 100 101 static ssize_t target_core_item_dbroot_show(struct config_item *item, 102 char *page) 103 { 104 return sprintf(page, "%s\n", db_root); 105 } 106 107 static ssize_t target_core_item_dbroot_store(struct config_item *item, 108 const char *page, size_t count) 109 { 110 ssize_t read_bytes; 111 struct file *fp; 112 ssize_t r = -EINVAL; 113 114 mutex_lock(&target_devices_lock); 115 if (target_devices) { 116 pr_err("db_root: cannot be changed because it's in use\n"); 117 goto unlock; 118 } 119 120 if (count > (DB_ROOT_LEN - 1)) { 121 pr_err("db_root: count %d exceeds DB_ROOT_LEN-1: %u\n", 122 (int)count, DB_ROOT_LEN - 1); 123 goto unlock; 124 } 125 126 read_bytes = scnprintf(db_root_stage, DB_ROOT_LEN, "%s", page); 127 if (!read_bytes) 128 goto unlock; 129 130 if (db_root_stage[read_bytes - 1] == '\n') 131 db_root_stage[read_bytes - 1] = '\0'; 132 133 /* validate new db root before accepting it */ 134 fp = filp_open(db_root_stage, O_RDONLY, 0); 135 if (IS_ERR(fp)) { 136 pr_err("db_root: cannot open: %s\n", db_root_stage); 137 goto unlock; 138 } 139 if (!S_ISDIR(file_inode(fp)->i_mode)) { 140 filp_close(fp, NULL); 141 pr_err("db_root: not a directory: %s\n", db_root_stage); 142 goto unlock; 143 } 144 filp_close(fp, NULL); 145 146 strscpy(db_root, db_root_stage); 147 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); 148 149 r = read_bytes; 150 151 unlock: 152 mutex_unlock(&target_devices_lock); 153 return r; 154 } 155 156 CONFIGFS_ATTR(target_core_item_, dbroot); 157 158 static struct target_fabric_configfs *target_core_get_fabric( 159 const char *name) 160 { 161 struct target_fabric_configfs *tf; 162 163 if (!name) 164 return NULL; 165 166 mutex_lock(&g_tf_lock); 167 list_for_each_entry(tf, &g_tf_list, tf_list) { 168 const char *cmp_name = tf->tf_ops->fabric_alias; 169 if (!cmp_name) 170 cmp_name = tf->tf_ops->fabric_name; 171 if (!strcmp(cmp_name, name)) { 172 atomic_inc(&tf->tf_access_cnt); 173 mutex_unlock(&g_tf_lock); 174 return tf; 175 } 176 } 177 mutex_unlock(&g_tf_lock); 178 179 return NULL; 180 } 181 182 /* 183 * Called from struct target_core_group_ops->make_group() 184 */ 185 static struct config_group *target_core_register_fabric( 186 struct config_group *group, 187 const char *name) 188 { 189 struct target_fabric_configfs *tf; 190 int ret; 191 192 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:" 193 " %s\n", group, name); 194 195 tf = target_core_get_fabric(name); 196 if (!tf) { 197 pr_debug("target_core_register_fabric() trying autoload for %s\n", 198 name); 199 200 /* 201 * Below are some hardcoded request_module() calls to automatically 202 * local fabric modules when the following is called: 203 * 204 * mkdir -p /sys/kernel/config/target/$MODULE_NAME 205 * 206 * Note that this does not limit which TCM fabric module can be 207 * registered, but simply provids auto loading logic for modules with 208 * mkdir(2) system calls with known TCM fabric modules. 209 */ 210 211 if (!strncmp(name, "iscsi", 5)) { 212 /* 213 * Automatically load the LIO Target fabric module when the 214 * following is called: 215 * 216 * mkdir -p $CONFIGFS/target/iscsi 217 */ 218 ret = request_module("iscsi_target_mod"); 219 if (ret < 0) { 220 pr_debug("request_module() failed for" 221 " iscsi_target_mod.ko: %d\n", ret); 222 return ERR_PTR(-EINVAL); 223 } 224 } else if (!strncmp(name, "loopback", 8)) { 225 /* 226 * Automatically load the tcm_loop fabric module when the 227 * following is called: 228 * 229 * mkdir -p $CONFIGFS/target/loopback 230 */ 231 ret = request_module("tcm_loop"); 232 if (ret < 0) { 233 pr_debug("request_module() failed for" 234 " tcm_loop.ko: %d\n", ret); 235 return ERR_PTR(-EINVAL); 236 } 237 } 238 239 tf = target_core_get_fabric(name); 240 } 241 242 if (!tf) { 243 pr_debug("target_core_get_fabric() failed for %s\n", 244 name); 245 return ERR_PTR(-EINVAL); 246 } 247 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:" 248 " %s\n", tf->tf_ops->fabric_name); 249 /* 250 * On a successful target_core_get_fabric() look, the returned 251 * struct target_fabric_configfs *tf will contain a usage reference. 252 */ 253 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n", 254 &tf->tf_wwn_cit); 255 256 config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit); 257 258 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth", 259 &tf->tf_discovery_cit); 260 configfs_add_default_group(&tf->tf_disc_group, &tf->tf_group); 261 262 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric: %s\n", 263 config_item_name(&tf->tf_group.cg_item)); 264 return &tf->tf_group; 265 } 266 267 /* 268 * Called from struct target_core_group_ops->drop_item() 269 */ 270 static void target_core_deregister_fabric( 271 struct config_group *group, 272 struct config_item *item) 273 { 274 struct target_fabric_configfs *tf = container_of( 275 to_config_group(item), struct target_fabric_configfs, tf_group); 276 277 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in" 278 " tf list\n", config_item_name(item)); 279 280 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:" 281 " %s\n", tf->tf_ops->fabric_name); 282 atomic_dec(&tf->tf_access_cnt); 283 284 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci" 285 " %s\n", config_item_name(item)); 286 287 configfs_remove_default_groups(&tf->tf_group); 288 config_item_put(item); 289 } 290 291 static const struct configfs_group_operations target_core_fabric_group_ops = { 292 .make_group = &target_core_register_fabric, 293 .drop_item = &target_core_deregister_fabric, 294 }; 295 296 /* 297 * All item attributes appearing in /sys/kernel/target/ appear here. 298 */ 299 static struct configfs_attribute *target_core_fabric_item_attrs[] = { 300 &target_core_item_attr_version, 301 &target_core_item_attr_dbroot, 302 NULL, 303 }; 304 305 /* 306 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/ 307 */ 308 static const struct config_item_type target_core_fabrics_item = { 309 .ct_group_ops = &target_core_fabric_group_ops, 310 .ct_attrs = target_core_fabric_item_attrs, 311 .ct_owner = THIS_MODULE, 312 }; 313 314 static struct configfs_subsystem target_core_fabrics = { 315 .su_group = { 316 .cg_item = { 317 .ci_namebuf = "target", 318 .ci_type = &target_core_fabrics_item, 319 }, 320 }, 321 }; 322 323 int target_depend_item(struct config_item *item) 324 { 325 return configfs_depend_item(&target_core_fabrics, item); 326 } 327 EXPORT_SYMBOL(target_depend_item); 328 329 void target_undepend_item(struct config_item *item) 330 { 331 return configfs_undepend_item(item); 332 } 333 EXPORT_SYMBOL(target_undepend_item); 334 335 /*############################################################################## 336 // Start functions called by external Target Fabrics Modules 337 //############################################################################*/ 338 static int target_disable_feature(struct se_portal_group *se_tpg) 339 { 340 return 0; 341 } 342 343 static u32 target_default_get_inst_index(struct se_portal_group *se_tpg) 344 { 345 return 1; 346 } 347 348 static u32 target_default_sess_get_index(struct se_session *se_sess) 349 { 350 return 0; 351 } 352 353 static void target_set_default_node_attributes(struct se_node_acl *se_acl) 354 { 355 } 356 357 static int target_default_get_cmd_state(struct se_cmd *se_cmd) 358 { 359 return 0; 360 } 361 362 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo) 363 { 364 if (tfo->fabric_alias) { 365 if (strlen(tfo->fabric_alias) >= TARGET_FABRIC_NAME_SIZE) { 366 pr_err("Passed alias: %s exceeds " 367 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_alias); 368 return -EINVAL; 369 } 370 } 371 if (!tfo->fabric_name) { 372 pr_err("Missing tfo->fabric_name\n"); 373 return -EINVAL; 374 } 375 if (strlen(tfo->fabric_name) >= TARGET_FABRIC_NAME_SIZE) { 376 pr_err("Passed name: %s exceeds " 377 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_name); 378 return -EINVAL; 379 } 380 if (!tfo->tpg_get_wwn) { 381 pr_err("Missing tfo->tpg_get_wwn()\n"); 382 return -EINVAL; 383 } 384 if (!tfo->tpg_get_tag) { 385 pr_err("Missing tfo->tpg_get_tag()\n"); 386 return -EINVAL; 387 } 388 if (!tfo->release_cmd) { 389 pr_err("Missing tfo->release_cmd()\n"); 390 return -EINVAL; 391 } 392 if (!tfo->write_pending) { 393 pr_err("Missing tfo->write_pending()\n"); 394 return -EINVAL; 395 } 396 if (!tfo->queue_data_in) { 397 pr_err("Missing tfo->queue_data_in()\n"); 398 return -EINVAL; 399 } 400 if (!tfo->queue_status) { 401 pr_err("Missing tfo->queue_status()\n"); 402 return -EINVAL; 403 } 404 if (!tfo->queue_tm_rsp) { 405 pr_err("Missing tfo->queue_tm_rsp()\n"); 406 return -EINVAL; 407 } 408 if (!tfo->aborted_task) { 409 pr_err("Missing tfo->aborted_task()\n"); 410 return -EINVAL; 411 } 412 if (!tfo->check_stop_free) { 413 pr_err("Missing tfo->check_stop_free()\n"); 414 return -EINVAL; 415 } 416 /* 417 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn() 418 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in 419 * target_core_fabric_configfs.c WWN+TPG group context code. 420 */ 421 if (!tfo->fabric_make_wwn) { 422 pr_err("Missing tfo->fabric_make_wwn()\n"); 423 return -EINVAL; 424 } 425 if (!tfo->fabric_drop_wwn) { 426 pr_err("Missing tfo->fabric_drop_wwn()\n"); 427 return -EINVAL; 428 } 429 if (!tfo->fabric_make_tpg) { 430 pr_err("Missing tfo->fabric_make_tpg()\n"); 431 return -EINVAL; 432 } 433 if (!tfo->fabric_drop_tpg) { 434 pr_err("Missing tfo->fabric_drop_tpg()\n"); 435 return -EINVAL; 436 } 437 438 return 0; 439 } 440 441 static void target_set_default_ops(struct target_core_fabric_ops *tfo) 442 { 443 if (!tfo->tpg_check_demo_mode) 444 tfo->tpg_check_demo_mode = target_disable_feature; 445 446 if (!tfo->tpg_check_demo_mode_cache) 447 tfo->tpg_check_demo_mode_cache = target_disable_feature; 448 449 if (!tfo->tpg_check_demo_mode_write_protect) 450 tfo->tpg_check_demo_mode_write_protect = target_disable_feature; 451 452 if (!tfo->tpg_check_prod_mode_write_protect) 453 tfo->tpg_check_prod_mode_write_protect = target_disable_feature; 454 455 if (!tfo->tpg_get_inst_index) 456 tfo->tpg_get_inst_index = target_default_get_inst_index; 457 458 if (!tfo->sess_get_index) 459 tfo->sess_get_index = target_default_sess_get_index; 460 461 if (!tfo->set_default_node_attributes) 462 tfo->set_default_node_attributes = target_set_default_node_attributes; 463 464 if (!tfo->get_cmd_state) 465 tfo->get_cmd_state = target_default_get_cmd_state; 466 } 467 468 int target_register_template(const struct target_core_fabric_ops *fo) 469 { 470 struct target_core_fabric_ops *tfo; 471 struct target_fabric_configfs *tf; 472 int ret; 473 474 ret = target_fabric_tf_ops_check(fo); 475 if (ret) 476 return ret; 477 478 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL); 479 if (!tf) { 480 pr_err("%s: could not allocate memory!\n", __func__); 481 return -ENOMEM; 482 } 483 tfo = kzalloc(sizeof(struct target_core_fabric_ops), GFP_KERNEL); 484 if (!tfo) { 485 kfree(tf); 486 pr_err("%s: could not allocate memory!\n", __func__); 487 return -ENOMEM; 488 } 489 memcpy(tfo, fo, sizeof(*tfo)); 490 target_set_default_ops(tfo); 491 492 INIT_LIST_HEAD(&tf->tf_list); 493 atomic_set(&tf->tf_access_cnt, 0); 494 tf->tf_ops = tfo; 495 target_fabric_setup_cits(tf); 496 497 mutex_lock(&g_tf_lock); 498 list_add_tail(&tf->tf_list, &g_tf_list); 499 mutex_unlock(&g_tf_lock); 500 501 return 0; 502 } 503 EXPORT_SYMBOL(target_register_template); 504 505 void target_unregister_template(const struct target_core_fabric_ops *fo) 506 { 507 struct target_fabric_configfs *t; 508 509 mutex_lock(&g_tf_lock); 510 list_for_each_entry(t, &g_tf_list, tf_list) { 511 if (!strcmp(t->tf_ops->fabric_name, fo->fabric_name)) { 512 BUG_ON(atomic_read(&t->tf_access_cnt)); 513 list_del(&t->tf_list); 514 mutex_unlock(&g_tf_lock); 515 /* 516 * Wait for any outstanding fabric se_deve_entry->rcu_head 517 * callbacks to complete post kfree_rcu(), before allowing 518 * fabric driver unload of TFO->module to proceed. 519 */ 520 rcu_barrier(); 521 kfree(t->tf_tpg_base_cit.ct_attrs); 522 kfree(t->tf_ops); 523 kfree(t); 524 return; 525 } 526 } 527 mutex_unlock(&g_tf_lock); 528 } 529 EXPORT_SYMBOL(target_unregister_template); 530 531 /*############################################################################## 532 // Stop functions called by external Target Fabrics Modules 533 //############################################################################*/ 534 535 static inline struct se_dev_attrib *to_attrib(struct config_item *item) 536 { 537 return container_of(to_config_group(item), struct se_dev_attrib, 538 da_group); 539 } 540 541 /* Start functions for struct config_item_type tb_dev_attrib_cit */ 542 #define DEF_CONFIGFS_ATTRIB_SHOW(_name) \ 543 static ssize_t _name##_show(struct config_item *item, char *page) \ 544 { \ 545 return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \ 546 } 547 548 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias); 549 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo); 550 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write); 551 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read); 552 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache); 553 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl); 554 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas); 555 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu); 556 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws); 557 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw); 558 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc); 559 DEF_CONFIGFS_ATTRIB_SHOW(emulate_pr); 560 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type); 561 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type); 562 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify); 563 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids); 564 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot); 565 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord); 566 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl); 567 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size); 568 DEF_CONFIGFS_ATTRIB_SHOW(block_size); 569 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors); 570 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors); 571 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth); 572 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth); 573 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count); 574 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count); 575 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity); 576 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment); 577 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data); 578 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len); 579 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rsoc); 580 DEF_CONFIGFS_ATTRIB_SHOW(submit_type); 581 DEF_CONFIGFS_ATTRIB_SHOW(atomic_max_len); 582 DEF_CONFIGFS_ATTRIB_SHOW(atomic_alignment); 583 DEF_CONFIGFS_ATTRIB_SHOW(atomic_granularity); 584 DEF_CONFIGFS_ATTRIB_SHOW(atomic_max_with_boundary); 585 DEF_CONFIGFS_ATTRIB_SHOW(atomic_max_boundary); 586 587 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \ 588 static ssize_t _name##_store(struct config_item *item, const char *page,\ 589 size_t count) \ 590 { \ 591 struct se_dev_attrib *da = to_attrib(item); \ 592 u32 val; \ 593 int ret; \ 594 \ 595 ret = kstrtou32(page, 0, &val); \ 596 if (ret < 0) \ 597 return ret; \ 598 da->_name = val; \ 599 return count; \ 600 } 601 602 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count); 603 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count); 604 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity); 605 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment); 606 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len); 607 608 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \ 609 static ssize_t _name##_store(struct config_item *item, const char *page, \ 610 size_t count) \ 611 { \ 612 struct se_dev_attrib *da = to_attrib(item); \ 613 bool flag; \ 614 int ret; \ 615 \ 616 ret = kstrtobool(page, &flag); \ 617 if (ret < 0) \ 618 return ret; \ 619 da->_name = flag; \ 620 return count; \ 621 } 622 623 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write); 624 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw); 625 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc); 626 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr); 627 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids); 628 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot); 629 630 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \ 631 static ssize_t _name##_store(struct config_item *item, const char *page,\ 632 size_t count) \ 633 { \ 634 printk_once(KERN_WARNING \ 635 "ignoring deprecated %s attribute\n", \ 636 __stringify(_name)); \ 637 return count; \ 638 } 639 640 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo); 641 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read); 642 643 static void dev_set_t10_wwn_model_alias(struct se_device *dev) 644 { 645 const char *configname; 646 647 configname = config_item_name(&dev->dev_group.cg_item); 648 if (strlen(configname) >= INQUIRY_MODEL_LEN) { 649 pr_warn("dev[%p]: Backstore name '%s' is too long for " 650 "INQUIRY_MODEL, truncating to 15 characters\n", dev, 651 configname); 652 } 653 /* 654 * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1) 655 * here without potentially breaking existing setups, so continue to 656 * truncate one byte shorter than what can be carried in INQUIRY. 657 */ 658 strscpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN); 659 } 660 661 static ssize_t emulate_model_alias_store(struct config_item *item, 662 const char *page, size_t count) 663 { 664 struct se_dev_attrib *da = to_attrib(item); 665 struct se_device *dev = da->da_dev; 666 bool flag; 667 int ret; 668 669 if (dev->export_count) { 670 pr_err("dev[%p]: Unable to change model alias" 671 " while export_count is %d\n", 672 dev, dev->export_count); 673 return -EINVAL; 674 } 675 676 ret = kstrtobool(page, &flag); 677 if (ret < 0) 678 return ret; 679 680 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); 681 if (flag) 682 dev_set_t10_wwn_model_alias(dev); 683 else 684 strscpy(dev->t10_wwn.model, dev->transport->inquiry_prod); 685 da->emulate_model_alias = flag; 686 return count; 687 } 688 689 static ssize_t emulate_write_cache_store(struct config_item *item, 690 const char *page, size_t count) 691 { 692 struct se_dev_attrib *da = to_attrib(item); 693 bool flag; 694 int ret; 695 696 ret = kstrtobool(page, &flag); 697 if (ret < 0) 698 return ret; 699 700 if (flag && da->da_dev->transport->get_write_cache) { 701 pr_err("emulate_write_cache not supported for this device\n"); 702 return -EINVAL; 703 } 704 705 da->emulate_write_cache = flag; 706 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", 707 da->da_dev, flag); 708 return count; 709 } 710 711 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item, 712 const char *page, size_t count) 713 { 714 struct se_dev_attrib *da = to_attrib(item); 715 u32 val; 716 int ret; 717 718 ret = kstrtou32(page, 0, &val); 719 if (ret < 0) 720 return ret; 721 722 if (val != TARGET_UA_INTLCK_CTRL_CLEAR 723 && val != TARGET_UA_INTLCK_CTRL_NO_CLEAR 724 && val != TARGET_UA_INTLCK_CTRL_ESTABLISH_UA) { 725 pr_err("Illegal value %d\n", val); 726 return -EINVAL; 727 } 728 729 if (da->da_dev->export_count) { 730 pr_err("dev[%p]: Unable to change SE Device" 731 " UA_INTRLCK_CTRL while export_count is %d\n", 732 da->da_dev, da->da_dev->export_count); 733 return -EINVAL; 734 } 735 da->emulate_ua_intlck_ctrl = val; 736 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", 737 da->da_dev, val); 738 return count; 739 } 740 741 static ssize_t emulate_tas_store(struct config_item *item, 742 const char *page, size_t count) 743 { 744 struct se_dev_attrib *da = to_attrib(item); 745 bool flag; 746 int ret; 747 748 ret = kstrtobool(page, &flag); 749 if (ret < 0) 750 return ret; 751 752 if (da->da_dev->export_count) { 753 pr_err("dev[%p]: Unable to change SE Device TAS while" 754 " export_count is %d\n", 755 da->da_dev, da->da_dev->export_count); 756 return -EINVAL; 757 } 758 da->emulate_tas = flag; 759 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", 760 da->da_dev, flag ? "Enabled" : "Disabled"); 761 762 return count; 763 } 764 765 static int target_try_configure_unmap(struct se_device *dev, 766 const char *config_opt) 767 { 768 if (!dev->transport->configure_unmap) { 769 pr_err("Generic Block Discard not supported\n"); 770 return -ENOSYS; 771 } 772 773 if (!target_dev_configured(dev)) { 774 pr_err("Generic Block Discard setup for %s requires device to be configured\n", 775 config_opt); 776 return -ENODEV; 777 } 778 779 if (!dev->transport->configure_unmap(dev)) { 780 pr_err("Generic Block Discard setup for %s failed\n", 781 config_opt); 782 return -ENOSYS; 783 } 784 785 return 0; 786 } 787 788 static ssize_t emulate_tpu_store(struct config_item *item, 789 const char *page, size_t count) 790 { 791 struct se_dev_attrib *da = to_attrib(item); 792 struct se_device *dev = da->da_dev; 793 bool flag; 794 int ret; 795 796 ret = kstrtobool(page, &flag); 797 if (ret < 0) 798 return ret; 799 800 /* 801 * We expect this value to be non-zero when generic Block Layer 802 * Discard supported is detected iblock_create_virtdevice(). 803 */ 804 if (flag && !da->max_unmap_block_desc_count) { 805 ret = target_try_configure_unmap(dev, "emulate_tpu"); 806 if (ret) 807 return ret; 808 } 809 810 da->emulate_tpu = flag; 811 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", 812 da->da_dev, flag); 813 return count; 814 } 815 816 static ssize_t emulate_tpws_store(struct config_item *item, 817 const char *page, size_t count) 818 { 819 struct se_dev_attrib *da = to_attrib(item); 820 struct se_device *dev = da->da_dev; 821 bool flag; 822 int ret; 823 824 ret = kstrtobool(page, &flag); 825 if (ret < 0) 826 return ret; 827 828 /* 829 * We expect this value to be non-zero when generic Block Layer 830 * Discard supported is detected iblock_create_virtdevice(). 831 */ 832 if (flag && !da->max_unmap_block_desc_count) { 833 ret = target_try_configure_unmap(dev, "emulate_tpws"); 834 if (ret) 835 return ret; 836 } 837 838 da->emulate_tpws = flag; 839 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", 840 da->da_dev, flag); 841 return count; 842 } 843 844 static ssize_t pi_prot_type_store(struct config_item *item, 845 const char *page, size_t count) 846 { 847 struct se_dev_attrib *da = to_attrib(item); 848 int old_prot = da->pi_prot_type, ret; 849 struct se_device *dev = da->da_dev; 850 u32 flag; 851 852 ret = kstrtou32(page, 0, &flag); 853 if (ret < 0) 854 return ret; 855 856 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) { 857 pr_err("Illegal value %d for pi_prot_type\n", flag); 858 return -EINVAL; 859 } 860 if (flag == 2) { 861 pr_err("DIF TYPE2 protection currently not supported\n"); 862 return -ENOSYS; 863 } 864 if (da->hw_pi_prot_type) { 865 pr_warn("DIF protection enabled on underlying hardware," 866 " ignoring\n"); 867 return count; 868 } 869 if (!dev->transport->init_prot || !dev->transport->free_prot) { 870 /* 0 is only allowed value for non-supporting backends */ 871 if (flag == 0) 872 return count; 873 874 pr_err("DIF protection not supported by backend: %s\n", 875 dev->transport->name); 876 return -ENOSYS; 877 } 878 if (!target_dev_configured(dev)) { 879 pr_err("DIF protection requires device to be configured\n"); 880 return -ENODEV; 881 } 882 if (dev->export_count) { 883 pr_err("dev[%p]: Unable to change SE Device PROT type while" 884 " export_count is %d\n", dev, dev->export_count); 885 return -EINVAL; 886 } 887 888 da->pi_prot_type = flag; 889 890 if (flag && !old_prot) { 891 ret = dev->transport->init_prot(dev); 892 if (ret) { 893 da->pi_prot_type = old_prot; 894 da->pi_prot_verify = (bool) da->pi_prot_type; 895 return ret; 896 } 897 898 } else if (!flag && old_prot) { 899 dev->transport->free_prot(dev); 900 } 901 902 da->pi_prot_verify = (bool) da->pi_prot_type; 903 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag); 904 return count; 905 } 906 907 /* always zero, but attr needs to remain RW to avoid userspace breakage */ 908 static ssize_t pi_prot_format_show(struct config_item *item, char *page) 909 { 910 return snprintf(page, PAGE_SIZE, "0\n"); 911 } 912 913 static ssize_t pi_prot_format_store(struct config_item *item, 914 const char *page, size_t count) 915 { 916 struct se_dev_attrib *da = to_attrib(item); 917 struct se_device *dev = da->da_dev; 918 bool flag; 919 int ret; 920 921 ret = kstrtobool(page, &flag); 922 if (ret < 0) 923 return ret; 924 925 if (!flag) 926 return count; 927 928 if (!dev->transport->format_prot) { 929 pr_err("DIF protection format not supported by backend %s\n", 930 dev->transport->name); 931 return -ENOSYS; 932 } 933 if (!target_dev_configured(dev)) { 934 pr_err("DIF protection format requires device to be configured\n"); 935 return -ENODEV; 936 } 937 if (dev->export_count) { 938 pr_err("dev[%p]: Unable to format SE Device PROT type while" 939 " export_count is %d\n", dev, dev->export_count); 940 return -EINVAL; 941 } 942 943 ret = dev->transport->format_prot(dev); 944 if (ret) 945 return ret; 946 947 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev); 948 return count; 949 } 950 951 static ssize_t pi_prot_verify_store(struct config_item *item, 952 const char *page, size_t count) 953 { 954 struct se_dev_attrib *da = to_attrib(item); 955 bool flag; 956 int ret; 957 958 ret = kstrtobool(page, &flag); 959 if (ret < 0) 960 return ret; 961 962 if (!flag) { 963 da->pi_prot_verify = flag; 964 return count; 965 } 966 if (da->hw_pi_prot_type) { 967 pr_warn("DIF protection enabled on underlying hardware," 968 " ignoring\n"); 969 return count; 970 } 971 if (!da->pi_prot_type) { 972 pr_warn("DIF protection not supported by backend, ignoring\n"); 973 return count; 974 } 975 da->pi_prot_verify = flag; 976 977 return count; 978 } 979 980 static ssize_t force_pr_aptpl_store(struct config_item *item, 981 const char *page, size_t count) 982 { 983 struct se_dev_attrib *da = to_attrib(item); 984 bool flag; 985 int ret; 986 987 ret = kstrtobool(page, &flag); 988 if (ret < 0) 989 return ret; 990 if (da->da_dev->export_count) { 991 pr_err("dev[%p]: Unable to set force_pr_aptpl while" 992 " export_count is %d\n", 993 da->da_dev, da->da_dev->export_count); 994 return -EINVAL; 995 } 996 997 da->force_pr_aptpl = flag; 998 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag); 999 return count; 1000 } 1001 1002 static ssize_t emulate_rest_reord_store(struct config_item *item, 1003 const char *page, size_t count) 1004 { 1005 struct se_dev_attrib *da = to_attrib(item); 1006 bool flag; 1007 int ret; 1008 1009 ret = kstrtobool(page, &flag); 1010 if (ret < 0) 1011 return ret; 1012 1013 if (flag != 0) { 1014 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted" 1015 " reordering not implemented\n", da->da_dev); 1016 return -ENOSYS; 1017 } 1018 da->emulate_rest_reord = flag; 1019 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", 1020 da->da_dev, flag); 1021 return count; 1022 } 1023 1024 static ssize_t unmap_zeroes_data_store(struct config_item *item, 1025 const char *page, size_t count) 1026 { 1027 struct se_dev_attrib *da = to_attrib(item); 1028 struct se_device *dev = da->da_dev; 1029 bool flag; 1030 int ret; 1031 1032 ret = kstrtobool(page, &flag); 1033 if (ret < 0) 1034 return ret; 1035 1036 if (da->da_dev->export_count) { 1037 pr_err("dev[%p]: Unable to change SE Device" 1038 " unmap_zeroes_data while export_count is %d\n", 1039 da->da_dev, da->da_dev->export_count); 1040 return -EINVAL; 1041 } 1042 /* 1043 * We expect this value to be non-zero when generic Block Layer 1044 * Discard supported is detected iblock_configure_device(). 1045 */ 1046 if (flag && !da->max_unmap_block_desc_count) { 1047 ret = target_try_configure_unmap(dev, "unmap_zeroes_data"); 1048 if (ret) 1049 return ret; 1050 } 1051 da->unmap_zeroes_data = flag; 1052 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n", 1053 da->da_dev, flag); 1054 return count; 1055 } 1056 1057 /* 1058 * Note, this can only be called on unexported SE Device Object. 1059 */ 1060 static ssize_t queue_depth_store(struct config_item *item, 1061 const char *page, size_t count) 1062 { 1063 struct se_dev_attrib *da = to_attrib(item); 1064 struct se_device *dev = da->da_dev; 1065 u32 val; 1066 int ret; 1067 1068 ret = kstrtou32(page, 0, &val); 1069 if (ret < 0) 1070 return ret; 1071 1072 if (dev->export_count) { 1073 pr_err("dev[%p]: Unable to change SE Device TCQ while" 1074 " export_count is %d\n", 1075 dev, dev->export_count); 1076 return -EINVAL; 1077 } 1078 if (!val) { 1079 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev); 1080 return -EINVAL; 1081 } 1082 1083 if (val > dev->dev_attrib.queue_depth) { 1084 if (val > dev->dev_attrib.hw_queue_depth) { 1085 pr_err("dev[%p]: Passed queue_depth:" 1086 " %u exceeds TCM/SE_Device MAX" 1087 " TCQ: %u\n", dev, val, 1088 dev->dev_attrib.hw_queue_depth); 1089 return -EINVAL; 1090 } 1091 } 1092 da->queue_depth = dev->queue_depth = val; 1093 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val); 1094 return count; 1095 } 1096 1097 static ssize_t optimal_sectors_store(struct config_item *item, 1098 const char *page, size_t count) 1099 { 1100 struct se_dev_attrib *da = to_attrib(item); 1101 u32 val; 1102 int ret; 1103 1104 ret = kstrtou32(page, 0, &val); 1105 if (ret < 0) 1106 return ret; 1107 1108 if (da->da_dev->export_count) { 1109 pr_err("dev[%p]: Unable to change SE Device" 1110 " optimal_sectors while export_count is %d\n", 1111 da->da_dev, da->da_dev->export_count); 1112 return -EINVAL; 1113 } 1114 if (val > da->hw_max_sectors) { 1115 pr_err("dev[%p]: Passed optimal_sectors %u cannot be" 1116 " greater than hw_max_sectors: %u\n", 1117 da->da_dev, val, da->hw_max_sectors); 1118 return -EINVAL; 1119 } 1120 1121 da->optimal_sectors = val; 1122 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", 1123 da->da_dev, val); 1124 return count; 1125 } 1126 1127 static ssize_t block_size_store(struct config_item *item, 1128 const char *page, size_t count) 1129 { 1130 struct se_dev_attrib *da = to_attrib(item); 1131 u32 val; 1132 int ret; 1133 1134 ret = kstrtou32(page, 0, &val); 1135 if (ret < 0) 1136 return ret; 1137 1138 if (da->da_dev->export_count) { 1139 pr_err("dev[%p]: Unable to change SE Device block_size" 1140 " while export_count is %d\n", 1141 da->da_dev, da->da_dev->export_count); 1142 return -EINVAL; 1143 } 1144 1145 if (val != 512 && val != 1024 && val != 2048 && val != 4096) { 1146 pr_err("dev[%p]: Illegal value for block_device: %u" 1147 " for SE device, must be 512, 1024, 2048 or 4096\n", 1148 da->da_dev, val); 1149 return -EINVAL; 1150 } 1151 1152 da->block_size = val; 1153 1154 pr_debug("dev[%p]: SE Device block_size changed to %u\n", 1155 da->da_dev, val); 1156 return count; 1157 } 1158 1159 static ssize_t alua_support_show(struct config_item *item, char *page) 1160 { 1161 struct se_dev_attrib *da = to_attrib(item); 1162 u8 flags = da->da_dev->transport_flags; 1163 1164 return snprintf(page, PAGE_SIZE, "%d\n", 1165 flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1); 1166 } 1167 1168 static ssize_t alua_support_store(struct config_item *item, 1169 const char *page, size_t count) 1170 { 1171 struct se_dev_attrib *da = to_attrib(item); 1172 struct se_device *dev = da->da_dev; 1173 bool flag, oldflag; 1174 int ret; 1175 1176 ret = kstrtobool(page, &flag); 1177 if (ret < 0) 1178 return ret; 1179 1180 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA); 1181 if (flag == oldflag) 1182 return count; 1183 1184 if (!(dev->transport->transport_flags_changeable & 1185 TRANSPORT_FLAG_PASSTHROUGH_ALUA)) { 1186 pr_err("dev[%p]: Unable to change SE Device alua_support:" 1187 " alua_support has fixed value\n", dev); 1188 return -ENOSYS; 1189 } 1190 1191 if (flag) 1192 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_ALUA; 1193 else 1194 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_ALUA; 1195 return count; 1196 } 1197 1198 static ssize_t pgr_support_show(struct config_item *item, char *page) 1199 { 1200 struct se_dev_attrib *da = to_attrib(item); 1201 u8 flags = da->da_dev->transport_flags; 1202 1203 return snprintf(page, PAGE_SIZE, "%d\n", 1204 flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1); 1205 } 1206 1207 static ssize_t pgr_support_store(struct config_item *item, 1208 const char *page, size_t count) 1209 { 1210 struct se_dev_attrib *da = to_attrib(item); 1211 struct se_device *dev = da->da_dev; 1212 bool flag, oldflag; 1213 int ret; 1214 1215 ret = kstrtobool(page, &flag); 1216 if (ret < 0) 1217 return ret; 1218 1219 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR); 1220 if (flag == oldflag) 1221 return count; 1222 1223 if (!(dev->transport->transport_flags_changeable & 1224 TRANSPORT_FLAG_PASSTHROUGH_PGR)) { 1225 pr_err("dev[%p]: Unable to change SE Device pgr_support:" 1226 " pgr_support has fixed value\n", dev); 1227 return -ENOSYS; 1228 } 1229 1230 if (flag) 1231 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_PGR; 1232 else 1233 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_PGR; 1234 return count; 1235 } 1236 1237 static ssize_t emulate_rsoc_store(struct config_item *item, 1238 const char *page, size_t count) 1239 { 1240 struct se_dev_attrib *da = to_attrib(item); 1241 bool flag; 1242 int ret; 1243 1244 ret = kstrtobool(page, &flag); 1245 if (ret < 0) 1246 return ret; 1247 1248 da->emulate_rsoc = flag; 1249 pr_debug("dev[%p]: SE Device REPORT_SUPPORTED_OPERATION_CODES_EMULATION flag: %d\n", 1250 da->da_dev, flag); 1251 return count; 1252 } 1253 1254 static ssize_t submit_type_store(struct config_item *item, const char *page, 1255 size_t count) 1256 { 1257 struct se_dev_attrib *da = to_attrib(item); 1258 int ret; 1259 u8 val; 1260 1261 ret = kstrtou8(page, 0, &val); 1262 if (ret < 0) 1263 return ret; 1264 1265 if (val > TARGET_QUEUE_SUBMIT) 1266 return -EINVAL; 1267 1268 da->submit_type = val; 1269 return count; 1270 } 1271 1272 CONFIGFS_ATTR(, emulate_model_alias); 1273 CONFIGFS_ATTR(, emulate_dpo); 1274 CONFIGFS_ATTR(, emulate_fua_write); 1275 CONFIGFS_ATTR(, emulate_fua_read); 1276 CONFIGFS_ATTR(, emulate_write_cache); 1277 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl); 1278 CONFIGFS_ATTR(, emulate_tas); 1279 CONFIGFS_ATTR(, emulate_tpu); 1280 CONFIGFS_ATTR(, emulate_tpws); 1281 CONFIGFS_ATTR(, emulate_caw); 1282 CONFIGFS_ATTR(, emulate_3pc); 1283 CONFIGFS_ATTR(, emulate_pr); 1284 CONFIGFS_ATTR(, emulate_rsoc); 1285 CONFIGFS_ATTR(, pi_prot_type); 1286 CONFIGFS_ATTR_RO(, hw_pi_prot_type); 1287 CONFIGFS_ATTR(, pi_prot_format); 1288 CONFIGFS_ATTR(, pi_prot_verify); 1289 CONFIGFS_ATTR(, enforce_pr_isids); 1290 CONFIGFS_ATTR(, is_nonrot); 1291 CONFIGFS_ATTR(, emulate_rest_reord); 1292 CONFIGFS_ATTR(, force_pr_aptpl); 1293 CONFIGFS_ATTR_RO(, hw_block_size); 1294 CONFIGFS_ATTR(, block_size); 1295 CONFIGFS_ATTR_RO(, hw_max_sectors); 1296 CONFIGFS_ATTR(, optimal_sectors); 1297 CONFIGFS_ATTR_RO(, hw_queue_depth); 1298 CONFIGFS_ATTR(, queue_depth); 1299 CONFIGFS_ATTR(, max_unmap_lba_count); 1300 CONFIGFS_ATTR(, max_unmap_block_desc_count); 1301 CONFIGFS_ATTR(, unmap_granularity); 1302 CONFIGFS_ATTR(, unmap_granularity_alignment); 1303 CONFIGFS_ATTR(, unmap_zeroes_data); 1304 CONFIGFS_ATTR(, max_write_same_len); 1305 CONFIGFS_ATTR(, alua_support); 1306 CONFIGFS_ATTR(, pgr_support); 1307 CONFIGFS_ATTR(, submit_type); 1308 CONFIGFS_ATTR_RO(, atomic_max_len); 1309 CONFIGFS_ATTR_RO(, atomic_alignment); 1310 CONFIGFS_ATTR_RO(, atomic_granularity); 1311 CONFIGFS_ATTR_RO(, atomic_max_with_boundary); 1312 CONFIGFS_ATTR_RO(, atomic_max_boundary); 1313 1314 /* 1315 * dev_attrib attributes for devices using the target core SBC/SPC 1316 * interpreter. Any backend using spc_parse_cdb should be using 1317 * these. 1318 */ 1319 struct configfs_attribute *sbc_attrib_attrs[] = { 1320 &attr_emulate_model_alias, 1321 &attr_emulate_dpo, 1322 &attr_emulate_fua_write, 1323 &attr_emulate_fua_read, 1324 &attr_emulate_write_cache, 1325 &attr_emulate_ua_intlck_ctrl, 1326 &attr_emulate_tas, 1327 &attr_emulate_tpu, 1328 &attr_emulate_tpws, 1329 &attr_emulate_caw, 1330 &attr_emulate_3pc, 1331 &attr_emulate_pr, 1332 &attr_pi_prot_type, 1333 &attr_hw_pi_prot_type, 1334 &attr_pi_prot_format, 1335 &attr_pi_prot_verify, 1336 &attr_enforce_pr_isids, 1337 &attr_is_nonrot, 1338 &attr_emulate_rest_reord, 1339 &attr_force_pr_aptpl, 1340 &attr_hw_block_size, 1341 &attr_block_size, 1342 &attr_hw_max_sectors, 1343 &attr_optimal_sectors, 1344 &attr_hw_queue_depth, 1345 &attr_queue_depth, 1346 &attr_max_unmap_lba_count, 1347 &attr_max_unmap_block_desc_count, 1348 &attr_unmap_granularity, 1349 &attr_unmap_granularity_alignment, 1350 &attr_unmap_zeroes_data, 1351 &attr_max_write_same_len, 1352 &attr_alua_support, 1353 &attr_pgr_support, 1354 &attr_emulate_rsoc, 1355 &attr_submit_type, 1356 &attr_atomic_alignment, 1357 &attr_atomic_max_len, 1358 &attr_atomic_granularity, 1359 &attr_atomic_max_with_boundary, 1360 &attr_atomic_max_boundary, 1361 NULL, 1362 }; 1363 EXPORT_SYMBOL(sbc_attrib_attrs); 1364 1365 /* 1366 * Minimal dev_attrib attributes for devices passing through CDBs. 1367 * In this case we only provide a few read-only attributes for 1368 * backwards compatibility. 1369 */ 1370 struct configfs_attribute *passthrough_attrib_attrs[] = { 1371 &attr_hw_pi_prot_type, 1372 &attr_hw_block_size, 1373 &attr_hw_max_sectors, 1374 &attr_hw_queue_depth, 1375 &attr_emulate_pr, 1376 &attr_alua_support, 1377 &attr_pgr_support, 1378 &attr_submit_type, 1379 NULL, 1380 }; 1381 EXPORT_SYMBOL(passthrough_attrib_attrs); 1382 1383 /* 1384 * pr related dev_attrib attributes for devices passing through CDBs, 1385 * but allowing in core pr emulation. 1386 */ 1387 struct configfs_attribute *passthrough_pr_attrib_attrs[] = { 1388 &attr_enforce_pr_isids, 1389 &attr_force_pr_aptpl, 1390 NULL, 1391 }; 1392 EXPORT_SYMBOL(passthrough_pr_attrib_attrs); 1393 1394 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL); 1395 TB_CIT_SETUP_DRV(dev_action, NULL, NULL); 1396 1397 /* End functions for struct config_item_type tb_dev_attrib_cit */ 1398 1399 /* Start functions for struct config_item_type tb_dev_wwn_cit */ 1400 1401 static struct t10_wwn *to_t10_wwn(struct config_item *item) 1402 { 1403 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group); 1404 } 1405 1406 static ssize_t target_check_inquiry_data(char *buf) 1407 { 1408 size_t len; 1409 int i; 1410 1411 len = strlen(buf); 1412 1413 /* 1414 * SPC 4.3.1: 1415 * ASCII data fields shall contain only ASCII printable characters 1416 * (i.e., code values 20h to 7Eh) and may be terminated with one or 1417 * more ASCII null (00h) characters. 1418 */ 1419 for (i = 0; i < len; i++) { 1420 if (buf[i] < 0x20 || buf[i] > 0x7E) { 1421 pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n"); 1422 return -EINVAL; 1423 } 1424 } 1425 1426 return len; 1427 } 1428 1429 /* 1430 * STANDARD and VPD page 0x83 T10 Vendor Identification 1431 */ 1432 static ssize_t target_wwn_vendor_id_show(struct config_item *item, 1433 char *page) 1434 { 1435 return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]); 1436 } 1437 1438 static ssize_t target_wwn_vendor_id_store(struct config_item *item, 1439 const char *page, size_t count) 1440 { 1441 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1442 struct se_device *dev = t10_wwn->t10_dev; 1443 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1444 unsigned char buf[INQUIRY_VENDOR_LEN + 2]; 1445 char *stripped = NULL; 1446 ssize_t len; 1447 ssize_t ret; 1448 1449 len = strscpy(buf, page); 1450 if (len > 0) { 1451 /* Strip any newline added from userspace. */ 1452 stripped = strstrip(buf); 1453 len = strlen(stripped); 1454 } 1455 if (len < 0 || len > INQUIRY_VENDOR_LEN) { 1456 pr_err("Emulated T10 Vendor Identification exceeds" 1457 " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN) 1458 "\n"); 1459 return -EOVERFLOW; 1460 } 1461 1462 ret = target_check_inquiry_data(stripped); 1463 1464 if (ret < 0) 1465 return ret; 1466 1467 /* 1468 * Check to see if any active exports exist. If they do exist, fail 1469 * here as changing this information on the fly (underneath the 1470 * initiator side OS dependent multipath code) could cause negative 1471 * effects. 1472 */ 1473 if (dev->export_count) { 1474 pr_err("Unable to set T10 Vendor Identification while" 1475 " active %d exports exist\n", dev->export_count); 1476 return -EINVAL; 1477 } 1478 1479 BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1); 1480 strscpy(dev->t10_wwn.vendor, stripped); 1481 1482 pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:" 1483 " %s\n", dev->t10_wwn.vendor); 1484 1485 return count; 1486 } 1487 1488 static ssize_t target_wwn_product_id_show(struct config_item *item, 1489 char *page) 1490 { 1491 return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]); 1492 } 1493 1494 static ssize_t target_wwn_product_id_store(struct config_item *item, 1495 const char *page, size_t count) 1496 { 1497 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1498 struct se_device *dev = t10_wwn->t10_dev; 1499 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1500 unsigned char buf[INQUIRY_MODEL_LEN + 2]; 1501 char *stripped = NULL; 1502 ssize_t len; 1503 ssize_t ret; 1504 1505 len = strscpy(buf, page); 1506 if (len > 0) { 1507 /* Strip any newline added from userspace. */ 1508 stripped = strstrip(buf); 1509 len = strlen(stripped); 1510 } 1511 if (len < 0 || len > INQUIRY_MODEL_LEN) { 1512 pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: " 1513 __stringify(INQUIRY_MODEL_LEN) 1514 "\n"); 1515 return -EOVERFLOW; 1516 } 1517 1518 ret = target_check_inquiry_data(stripped); 1519 1520 if (ret < 0) 1521 return ret; 1522 1523 /* 1524 * Check to see if any active exports exist. If they do exist, fail 1525 * here as changing this information on the fly (underneath the 1526 * initiator side OS dependent multipath code) could cause negative 1527 * effects. 1528 */ 1529 if (dev->export_count) { 1530 pr_err("Unable to set T10 Model while active %d exports exist\n", 1531 dev->export_count); 1532 return -EINVAL; 1533 } 1534 1535 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); 1536 strscpy(dev->t10_wwn.model, stripped); 1537 1538 pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n", 1539 dev->t10_wwn.model); 1540 1541 return count; 1542 } 1543 1544 static ssize_t target_wwn_revision_show(struct config_item *item, 1545 char *page) 1546 { 1547 return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]); 1548 } 1549 1550 static ssize_t target_wwn_revision_store(struct config_item *item, 1551 const char *page, size_t count) 1552 { 1553 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1554 struct se_device *dev = t10_wwn->t10_dev; 1555 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1556 unsigned char buf[INQUIRY_REVISION_LEN + 2]; 1557 char *stripped = NULL; 1558 ssize_t len; 1559 ssize_t ret; 1560 1561 len = strscpy(buf, page); 1562 if (len > 0) { 1563 /* Strip any newline added from userspace. */ 1564 stripped = strstrip(buf); 1565 len = strlen(stripped); 1566 } 1567 if (len < 0 || len > INQUIRY_REVISION_LEN) { 1568 pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: " 1569 __stringify(INQUIRY_REVISION_LEN) 1570 "\n"); 1571 return -EOVERFLOW; 1572 } 1573 1574 ret = target_check_inquiry_data(stripped); 1575 1576 if (ret < 0) 1577 return ret; 1578 1579 /* 1580 * Check to see if any active exports exist. If they do exist, fail 1581 * here as changing this information on the fly (underneath the 1582 * initiator side OS dependent multipath code) could cause negative 1583 * effects. 1584 */ 1585 if (dev->export_count) { 1586 pr_err("Unable to set T10 Revision while active %d exports exist\n", 1587 dev->export_count); 1588 return -EINVAL; 1589 } 1590 1591 BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1); 1592 strscpy(dev->t10_wwn.revision, stripped); 1593 1594 pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n", 1595 dev->t10_wwn.revision); 1596 1597 return count; 1598 } 1599 1600 static ssize_t 1601 target_wwn_company_id_show(struct config_item *item, 1602 char *page) 1603 { 1604 return snprintf(page, PAGE_SIZE, "%#08x\n", 1605 to_t10_wwn(item)->company_id); 1606 } 1607 1608 static ssize_t 1609 target_wwn_company_id_store(struct config_item *item, 1610 const char *page, size_t count) 1611 { 1612 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1613 struct se_device *dev = t10_wwn->t10_dev; 1614 u32 val; 1615 int ret; 1616 1617 /* 1618 * The IEEE COMPANY_ID field should contain a 24-bit canonical 1619 * form OUI assigned by the IEEE. 1620 */ 1621 ret = kstrtou32(page, 0, &val); 1622 if (ret < 0) 1623 return ret; 1624 1625 if (val >= 0x1000000) 1626 return -EOVERFLOW; 1627 1628 /* 1629 * Check to see if any active exports exist. If they do exist, fail 1630 * here as changing this information on the fly (underneath the 1631 * initiator side OS dependent multipath code) could cause negative 1632 * effects. 1633 */ 1634 if (dev->export_count) { 1635 pr_err("Unable to set Company ID while %u exports exist\n", 1636 dev->export_count); 1637 return -EINVAL; 1638 } 1639 1640 t10_wwn->company_id = val; 1641 1642 pr_debug("Target_Core_ConfigFS: Set IEEE Company ID: %#08x\n", 1643 t10_wwn->company_id); 1644 1645 return count; 1646 } 1647 1648 /* 1649 * VPD page 0x80 Unit serial 1650 */ 1651 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item, 1652 char *page) 1653 { 1654 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 1655 &to_t10_wwn(item)->unit_serial[0]); 1656 } 1657 1658 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item, 1659 const char *page, size_t count) 1660 { 1661 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1662 struct se_device *dev = t10_wwn->t10_dev; 1663 unsigned char buf[INQUIRY_VPD_SERIAL_LEN] = { }; 1664 1665 /* 1666 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 1667 * from the struct scsi_device level firmware, do not allow 1668 * VPD Unit Serial to be emulated. 1669 * 1670 * Note this struct scsi_device could also be emulating VPD 1671 * information from its drivers/scsi LLD. But for now we assume 1672 * it is doing 'the right thing' wrt a world wide unique 1673 * VPD Unit Serial Number that OS dependent multipath can depend on. 1674 */ 1675 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) { 1676 pr_err("Underlying SCSI device firmware provided VPD" 1677 " Unit Serial, ignoring request\n"); 1678 return -EOPNOTSUPP; 1679 } 1680 1681 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 1682 pr_err("Emulated VPD Unit Serial exceeds" 1683 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 1684 return -EOVERFLOW; 1685 } 1686 /* 1687 * Check to see if any active $FABRIC_MOD exports exist. If they 1688 * do exist, fail here as changing this information on the fly 1689 * (underneath the initiator side OS dependent multipath code) 1690 * could cause negative effects. 1691 */ 1692 if (dev->export_count) { 1693 pr_err("Unable to set VPD Unit Serial while" 1694 " active %d $FABRIC_MOD exports exist\n", 1695 dev->export_count); 1696 return -EINVAL; 1697 } 1698 1699 /* 1700 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 1701 * 1702 * Also, strip any newline added from the userspace 1703 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 1704 */ 1705 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 1706 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 1707 "%s", strstrip(buf)); 1708 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL; 1709 1710 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 1711 " %s\n", dev->t10_wwn.unit_serial); 1712 1713 return count; 1714 } 1715 1716 /* 1717 * VPD page 0x83 Protocol Identifier 1718 */ 1719 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item, 1720 char *page) 1721 { 1722 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1723 struct t10_vpd *vpd; 1724 unsigned char buf[VPD_TMP_BUF_SIZE] = { }; 1725 ssize_t len = 0; 1726 1727 spin_lock(&t10_wwn->t10_vpd_lock); 1728 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 1729 if (!vpd->protocol_identifier_set) 1730 continue; 1731 1732 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 1733 1734 if (len + strlen(buf) >= PAGE_SIZE) 1735 break; 1736 1737 len += sprintf(page+len, "%s", buf); 1738 } 1739 spin_unlock(&t10_wwn->t10_vpd_lock); 1740 1741 return len; 1742 } 1743 1744 static ssize_t target_wwn_pd_text_id_info_show(struct config_item *item, 1745 char *page) 1746 { 1747 return sysfs_emit(page, "%s\n", &to_t10_wwn(item)->pd_text_id_info[0]); 1748 } 1749 1750 static ssize_t target_wwn_pd_text_id_info_store(struct config_item *item, 1751 const char *page, size_t count) 1752 { 1753 struct t10_wwn *t10_wwn = to_t10_wwn(item); 1754 struct se_device *dev = t10_wwn->t10_dev; 1755 1756 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ 1757 unsigned char buf[PD_TEXT_ID_INFO_LEN + 2]; 1758 char *stripped; 1759 1760 /* 1761 * Check to see if any active exports exist. If they do exist, fail 1762 * here as changing this information on the fly (underneath the 1763 * initiator side OS dependent multipath code) could cause negative 1764 * effects. 1765 */ 1766 if (dev->export_count) { 1767 pr_err("Unable to set the peripheral device text id info while active %d exports exist\n", 1768 dev->export_count); 1769 return -EINVAL; 1770 } 1771 1772 if (strscpy(buf, page, sizeof(buf)) < 0) 1773 return -EOVERFLOW; 1774 1775 /* Strip any newline added from userspace. */ 1776 stripped = strstrip(buf); 1777 if (strlen(stripped) >= PD_TEXT_ID_INFO_LEN) { 1778 pr_err("Emulated peripheral device text id info exceeds PD_TEXT_ID_INFO_LEN: " __stringify(PD_TEXT_ID_INFO_LEN "\n")); 1779 return -EOVERFLOW; 1780 } 1781 1782 BUILD_BUG_ON(sizeof(dev->t10_wwn.pd_text_id_info) != PD_TEXT_ID_INFO_LEN); 1783 strscpy(dev->t10_wwn.pd_text_id_info, stripped, 1784 sizeof(dev->t10_wwn.pd_text_id_info)); 1785 1786 pr_debug("Target_Core_ConfigFS: Set emulated peripheral dev text id info:" 1787 " %s\n", dev->t10_wwn.pd_text_id_info); 1788 1789 return count; 1790 } 1791 1792 /* 1793 * Generic wrapper for dumping VPD identifiers by association. 1794 */ 1795 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 1796 static ssize_t target_wwn_##_name##_show(struct config_item *item, \ 1797 char *page) \ 1798 { \ 1799 struct t10_wwn *t10_wwn = to_t10_wwn(item); \ 1800 struct t10_vpd *vpd; \ 1801 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 1802 ssize_t len = 0; \ 1803 \ 1804 spin_lock(&t10_wwn->t10_vpd_lock); \ 1805 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 1806 if (vpd->association != _assoc) \ 1807 continue; \ 1808 \ 1809 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1810 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 1811 if (len + strlen(buf) >= PAGE_SIZE) \ 1812 break; \ 1813 len += sprintf(page+len, "%s", buf); \ 1814 \ 1815 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1816 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 1817 if (len + strlen(buf) >= PAGE_SIZE) \ 1818 break; \ 1819 len += sprintf(page+len, "%s", buf); \ 1820 \ 1821 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 1822 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 1823 if (len + strlen(buf) >= PAGE_SIZE) \ 1824 break; \ 1825 len += sprintf(page+len, "%s", buf); \ 1826 } \ 1827 spin_unlock(&t10_wwn->t10_vpd_lock); \ 1828 \ 1829 return len; \ 1830 } 1831 1832 /* VPD page 0x83 Association: Logical Unit */ 1833 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 1834 /* VPD page 0x83 Association: Target Port */ 1835 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 1836 /* VPD page 0x83 Association: SCSI Target Device */ 1837 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 1838 1839 CONFIGFS_ATTR(target_wwn_, vendor_id); 1840 CONFIGFS_ATTR(target_wwn_, product_id); 1841 CONFIGFS_ATTR(target_wwn_, revision); 1842 CONFIGFS_ATTR(target_wwn_, company_id); 1843 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial); 1844 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier); 1845 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit); 1846 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port); 1847 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device); 1848 CONFIGFS_ATTR(target_wwn_, pd_text_id_info); 1849 1850 static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 1851 &target_wwn_attr_vendor_id, 1852 &target_wwn_attr_product_id, 1853 &target_wwn_attr_revision, 1854 &target_wwn_attr_company_id, 1855 &target_wwn_attr_vpd_unit_serial, 1856 &target_wwn_attr_vpd_protocol_identifier, 1857 &target_wwn_attr_vpd_assoc_logical_unit, 1858 &target_wwn_attr_vpd_assoc_target_port, 1859 &target_wwn_attr_vpd_assoc_scsi_target_device, 1860 &target_wwn_attr_pd_text_id_info, 1861 NULL, 1862 }; 1863 1864 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs); 1865 1866 /* End functions for struct config_item_type tb_dev_wwn_cit */ 1867 1868 /* Start functions for struct config_item_type tb_dev_pr_cit */ 1869 1870 static struct se_device *pr_to_dev(struct config_item *item) 1871 { 1872 return container_of(to_config_group(item), struct se_device, 1873 dev_pr_group); 1874 } 1875 1876 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev, 1877 char *page) 1878 { 1879 struct se_node_acl *se_nacl; 1880 struct t10_pr_registration *pr_reg; 1881 char i_buf[PR_REG_ISID_ID_LEN] = { }; 1882 1883 pr_reg = dev->dev_pr_res_holder; 1884 if (!pr_reg) 1885 return sprintf(page, "No SPC-3 Reservation holder\n"); 1886 1887 se_nacl = pr_reg->pr_reg_nacl; 1888 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 1889 1890 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", 1891 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1892 se_nacl->initiatorname, i_buf); 1893 } 1894 1895 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, 1896 char *page) 1897 { 1898 struct se_session *sess = dev->reservation_holder; 1899 struct se_node_acl *se_nacl; 1900 ssize_t len; 1901 1902 if (sess) { 1903 se_nacl = sess->se_node_acl; 1904 len = sprintf(page, 1905 "SPC-2 Reservation: %s Initiator: %s\n", 1906 se_nacl->se_tpg->se_tpg_tfo->fabric_name, 1907 se_nacl->initiatorname); 1908 } else { 1909 len = sprintf(page, "No SPC-2 Reservation holder\n"); 1910 } 1911 return len; 1912 } 1913 1914 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page) 1915 { 1916 struct se_device *dev = pr_to_dev(item); 1917 int ret; 1918 1919 if (!dev->dev_attrib.emulate_pr) 1920 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 1921 1922 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 1923 return sprintf(page, "Passthrough\n"); 1924 1925 spin_lock(&dev->dev_reservation_lock); 1926 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1927 ret = target_core_dev_pr_show_spc2_res(dev, page); 1928 else 1929 ret = target_core_dev_pr_show_spc3_res(dev, page); 1930 spin_unlock(&dev->dev_reservation_lock); 1931 return ret; 1932 } 1933 1934 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item, 1935 char *page) 1936 { 1937 struct se_device *dev = pr_to_dev(item); 1938 ssize_t len = 0; 1939 1940 spin_lock(&dev->dev_reservation_lock); 1941 if (!dev->dev_pr_res_holder) { 1942 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1943 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { 1944 len = sprintf(page, "SPC-3 Reservation: All Target" 1945 " Ports registration\n"); 1946 } else { 1947 len = sprintf(page, "SPC-3 Reservation: Single" 1948 " Target Port registration\n"); 1949 } 1950 1951 spin_unlock(&dev->dev_reservation_lock); 1952 return len; 1953 } 1954 1955 static ssize_t target_pr_res_pr_generation_show(struct config_item *item, 1956 char *page) 1957 { 1958 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation); 1959 } 1960 1961 1962 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item, 1963 char *page) 1964 { 1965 struct se_device *dev = pr_to_dev(item); 1966 struct se_node_acl *se_nacl; 1967 struct se_portal_group *se_tpg; 1968 struct t10_pr_registration *pr_reg; 1969 const struct target_core_fabric_ops *tfo; 1970 ssize_t len = 0; 1971 1972 spin_lock(&dev->dev_reservation_lock); 1973 pr_reg = dev->dev_pr_res_holder; 1974 if (!pr_reg) { 1975 len = sprintf(page, "No SPC-3 Reservation holder\n"); 1976 goto out_unlock; 1977 } 1978 1979 se_nacl = pr_reg->pr_reg_nacl; 1980 se_tpg = se_nacl->se_tpg; 1981 tfo = se_tpg->se_tpg_tfo; 1982 1983 len += sprintf(page+len, "SPC-3 Reservation: %s" 1984 " Target Node Endpoint: %s\n", tfo->fabric_name, 1985 tfo->tpg_get_wwn(se_tpg)); 1986 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 1987 " Identifier Tag: %hu %s Portal Group Tag: %hu" 1988 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi, 1989 tfo->fabric_name, tfo->tpg_get_tag(se_tpg), 1990 tfo->fabric_name, pr_reg->pr_aptpl_target_lun); 1991 1992 out_unlock: 1993 spin_unlock(&dev->dev_reservation_lock); 1994 return len; 1995 } 1996 1997 1998 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item, 1999 char *page) 2000 { 2001 struct se_device *dev = pr_to_dev(item); 2002 const struct target_core_fabric_ops *tfo; 2003 struct t10_pr_registration *pr_reg; 2004 unsigned char buf[384]; 2005 char i_buf[PR_REG_ISID_ID_LEN]; 2006 ssize_t len = 0; 2007 int reg_count = 0; 2008 2009 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 2010 2011 spin_lock(&dev->t10_pr.registration_lock); 2012 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 2013 pr_reg_list) { 2014 2015 memset(buf, 0, 384); 2016 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 2017 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 2018 core_pr_dump_initiator_port(pr_reg, i_buf, 2019 PR_REG_ISID_ID_LEN); 2020 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 2021 tfo->fabric_name, 2022 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, 2023 pr_reg->pr_res_generation); 2024 2025 if (len + strlen(buf) >= PAGE_SIZE) 2026 break; 2027 2028 len += sprintf(page+len, "%s", buf); 2029 reg_count++; 2030 } 2031 spin_unlock(&dev->t10_pr.registration_lock); 2032 2033 if (!reg_count) 2034 len += sprintf(page+len, "None\n"); 2035 2036 return len; 2037 } 2038 2039 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page) 2040 { 2041 struct se_device *dev = pr_to_dev(item); 2042 struct t10_pr_registration *pr_reg; 2043 ssize_t len = 0; 2044 2045 spin_lock(&dev->dev_reservation_lock); 2046 pr_reg = dev->dev_pr_res_holder; 2047 if (pr_reg) { 2048 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 2049 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 2050 } else { 2051 len = sprintf(page, "No SPC-3 Reservation holder\n"); 2052 } 2053 2054 spin_unlock(&dev->dev_reservation_lock); 2055 return len; 2056 } 2057 2058 static ssize_t target_pr_res_type_show(struct config_item *item, char *page) 2059 { 2060 struct se_device *dev = pr_to_dev(item); 2061 2062 if (!dev->dev_attrib.emulate_pr) 2063 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); 2064 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) 2065 return sprintf(page, "SPC_PASSTHROUGH\n"); 2066 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 2067 return sprintf(page, "SPC2_RESERVATIONS\n"); 2068 2069 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 2070 } 2071 2072 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item, 2073 char *page) 2074 { 2075 struct se_device *dev = pr_to_dev(item); 2076 2077 if (!dev->dev_attrib.emulate_pr || 2078 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 2079 return 0; 2080 2081 return sprintf(page, "APTPL Bit Status: %s\n", 2082 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 2083 } 2084 2085 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item, 2086 char *page) 2087 { 2088 struct se_device *dev = pr_to_dev(item); 2089 2090 if (!dev->dev_attrib.emulate_pr || 2091 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 2092 return 0; 2093 2094 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 2095 } 2096 2097 enum { 2098 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 2099 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 2100 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 2101 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 2102 }; 2103 2104 static match_table_t tokens = { 2105 {Opt_initiator_fabric, "initiator_fabric=%s"}, 2106 {Opt_initiator_node, "initiator_node=%s"}, 2107 {Opt_initiator_sid, "initiator_sid=%s"}, 2108 {Opt_sa_res_key, "sa_res_key=%s"}, 2109 {Opt_res_holder, "res_holder=%d"}, 2110 {Opt_res_type, "res_type=%d"}, 2111 {Opt_res_scope, "res_scope=%d"}, 2112 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 2113 {Opt_mapped_lun, "mapped_lun=%u"}, 2114 {Opt_target_fabric, "target_fabric=%s"}, 2115 {Opt_target_node, "target_node=%s"}, 2116 {Opt_tpgt, "tpgt=%d"}, 2117 {Opt_port_rtpi, "port_rtpi=%d"}, 2118 {Opt_target_lun, "target_lun=%u"}, 2119 {Opt_err, NULL} 2120 }; 2121 2122 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item, 2123 const char *page, size_t count) 2124 { 2125 struct se_device *dev = pr_to_dev(item); 2126 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 2127 unsigned char *t_fabric = NULL, *t_port = NULL; 2128 char *orig, *ptr, *opts; 2129 substring_t args[MAX_OPT_ARGS]; 2130 unsigned long long tmp_ll; 2131 u64 sa_res_key = 0; 2132 u64 mapped_lun = 0, target_lun = 0; 2133 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 2134 u16 tpgt = 0; 2135 u8 type = 0; 2136 2137 if (!dev->dev_attrib.emulate_pr || 2138 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) 2139 return count; 2140 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 2141 return count; 2142 2143 if (dev->export_count) { 2144 pr_debug("Unable to process APTPL metadata while" 2145 " active fabric exports exist\n"); 2146 return -EINVAL; 2147 } 2148 2149 opts = kstrdup(page, GFP_KERNEL); 2150 if (!opts) 2151 return -ENOMEM; 2152 2153 orig = opts; 2154 while ((ptr = strsep(&opts, ",\n")) != NULL) { 2155 if (!*ptr) 2156 continue; 2157 2158 token = match_token(ptr, tokens, args); 2159 switch (token) { 2160 case Opt_initiator_fabric: 2161 i_fabric = match_strdup(args); 2162 if (!i_fabric) { 2163 ret = -ENOMEM; 2164 goto out; 2165 } 2166 break; 2167 case Opt_initiator_node: 2168 i_port = match_strdup(args); 2169 if (!i_port) { 2170 ret = -ENOMEM; 2171 goto out; 2172 } 2173 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 2174 pr_err("APTPL metadata initiator_node=" 2175 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 2176 PR_APTPL_MAX_IPORT_LEN); 2177 ret = -EINVAL; 2178 break; 2179 } 2180 break; 2181 case Opt_initiator_sid: 2182 isid = match_strdup(args); 2183 if (!isid) { 2184 ret = -ENOMEM; 2185 goto out; 2186 } 2187 if (strlen(isid) >= PR_REG_ISID_LEN) { 2188 pr_err("APTPL metadata initiator_isid" 2189 "= exceeds PR_REG_ISID_LEN: %d\n", 2190 PR_REG_ISID_LEN); 2191 ret = -EINVAL; 2192 break; 2193 } 2194 break; 2195 case Opt_sa_res_key: 2196 ret = match_u64(args, &tmp_ll); 2197 if (ret < 0) { 2198 pr_err("kstrtoull() failed for sa_res_key=\n"); 2199 goto out; 2200 } 2201 sa_res_key = (u64)tmp_ll; 2202 break; 2203 /* 2204 * PR APTPL Metadata for Reservation 2205 */ 2206 case Opt_res_holder: 2207 ret = match_int(args, &arg); 2208 if (ret) 2209 goto out; 2210 res_holder = arg; 2211 break; 2212 case Opt_res_type: 2213 ret = match_int(args, &arg); 2214 if (ret) 2215 goto out; 2216 type = (u8)arg; 2217 break; 2218 case Opt_res_scope: 2219 ret = match_int(args, &arg); 2220 if (ret) 2221 goto out; 2222 break; 2223 case Opt_res_all_tg_pt: 2224 ret = match_int(args, &arg); 2225 if (ret) 2226 goto out; 2227 all_tg_pt = (int)arg; 2228 break; 2229 case Opt_mapped_lun: 2230 ret = match_u64(args, &tmp_ll); 2231 if (ret) 2232 goto out; 2233 mapped_lun = (u64)tmp_ll; 2234 break; 2235 /* 2236 * PR APTPL Metadata for Target Port 2237 */ 2238 case Opt_target_fabric: 2239 t_fabric = match_strdup(args); 2240 if (!t_fabric) { 2241 ret = -ENOMEM; 2242 goto out; 2243 } 2244 break; 2245 case Opt_target_node: 2246 t_port = match_strdup(args); 2247 if (!t_port) { 2248 ret = -ENOMEM; 2249 goto out; 2250 } 2251 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 2252 pr_err("APTPL metadata target_node=" 2253 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 2254 PR_APTPL_MAX_TPORT_LEN); 2255 ret = -EINVAL; 2256 break; 2257 } 2258 break; 2259 case Opt_tpgt: 2260 ret = match_int(args, &arg); 2261 if (ret) 2262 goto out; 2263 tpgt = (u16)arg; 2264 break; 2265 case Opt_port_rtpi: 2266 ret = match_int(args, &arg); 2267 if (ret) 2268 goto out; 2269 break; 2270 case Opt_target_lun: 2271 ret = match_u64(args, &tmp_ll); 2272 if (ret) 2273 goto out; 2274 target_lun = (u64)tmp_ll; 2275 break; 2276 default: 2277 break; 2278 } 2279 } 2280 2281 if (!i_port || !t_port || !sa_res_key) { 2282 pr_err("Illegal parameters for APTPL registration\n"); 2283 ret = -EINVAL; 2284 goto out; 2285 } 2286 2287 if (res_holder && !(type)) { 2288 pr_err("Illegal PR type: 0x%02x for reservation" 2289 " holder\n", type); 2290 ret = -EINVAL; 2291 goto out; 2292 } 2293 2294 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, 2295 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 2296 res_holder, all_tg_pt, type); 2297 out: 2298 kfree(i_fabric); 2299 kfree(i_port); 2300 kfree(isid); 2301 kfree(t_fabric); 2302 kfree(t_port); 2303 kfree(orig); 2304 return (ret == 0) ? count : ret; 2305 } 2306 2307 2308 CONFIGFS_ATTR_RO(target_pr_, res_holder); 2309 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts); 2310 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation); 2311 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port); 2312 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts); 2313 CONFIGFS_ATTR_RO(target_pr_, res_pr_type); 2314 CONFIGFS_ATTR_RO(target_pr_, res_type); 2315 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active); 2316 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata); 2317 2318 static struct configfs_attribute *target_core_dev_pr_attrs[] = { 2319 &target_pr_attr_res_holder, 2320 &target_pr_attr_res_pr_all_tgt_pts, 2321 &target_pr_attr_res_pr_generation, 2322 &target_pr_attr_res_pr_holder_tg_port, 2323 &target_pr_attr_res_pr_registered_i_pts, 2324 &target_pr_attr_res_pr_type, 2325 &target_pr_attr_res_type, 2326 &target_pr_attr_res_aptpl_active, 2327 &target_pr_attr_res_aptpl_metadata, 2328 NULL, 2329 }; 2330 2331 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs); 2332 2333 /* End functions for struct config_item_type tb_dev_pr_cit */ 2334 2335 /* Start functions for struct config_item_type tb_dev_cit */ 2336 2337 static inline struct se_device *to_device(struct config_item *item) 2338 { 2339 return container_of(to_config_group(item), struct se_device, dev_group); 2340 } 2341 2342 static ssize_t target_dev_info_show(struct config_item *item, char *page) 2343 { 2344 struct se_device *dev = to_device(item); 2345 int bl = 0; 2346 ssize_t read_bytes = 0; 2347 2348 transport_dump_dev_state(dev, page, &bl); 2349 read_bytes += bl; 2350 read_bytes += dev->transport->show_configfs_dev_params(dev, 2351 page+read_bytes); 2352 return read_bytes; 2353 } 2354 2355 static ssize_t target_dev_control_store(struct config_item *item, 2356 const char *page, size_t count) 2357 { 2358 struct se_device *dev = to_device(item); 2359 2360 return dev->transport->set_configfs_dev_params(dev, page, count); 2361 } 2362 2363 static ssize_t target_dev_alias_show(struct config_item *item, char *page) 2364 { 2365 struct se_device *dev = to_device(item); 2366 2367 if (!(dev->dev_flags & DF_USING_ALIAS)) 2368 return 0; 2369 2370 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); 2371 } 2372 2373 static ssize_t target_dev_alias_store(struct config_item *item, 2374 const char *page, size_t count) 2375 { 2376 struct se_device *dev = to_device(item); 2377 struct se_hba *hba = dev->se_hba; 2378 ssize_t read_bytes; 2379 2380 if (count > (SE_DEV_ALIAS_LEN-1)) { 2381 pr_err("alias count: %d exceeds" 2382 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 2383 SE_DEV_ALIAS_LEN-1); 2384 return -EINVAL; 2385 } 2386 2387 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); 2388 if (!read_bytes) 2389 return -EINVAL; 2390 if (dev->dev_alias[read_bytes - 1] == '\n') 2391 dev->dev_alias[read_bytes - 1] = '\0'; 2392 2393 dev->dev_flags |= DF_USING_ALIAS; 2394 2395 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 2396 config_item_name(&hba->hba_group.cg_item), 2397 config_item_name(&dev->dev_group.cg_item), 2398 dev->dev_alias); 2399 2400 return read_bytes; 2401 } 2402 2403 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page) 2404 { 2405 struct se_device *dev = to_device(item); 2406 2407 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) 2408 return 0; 2409 2410 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); 2411 } 2412 2413 static ssize_t target_dev_udev_path_store(struct config_item *item, 2414 const char *page, size_t count) 2415 { 2416 struct se_device *dev = to_device(item); 2417 struct se_hba *hba = dev->se_hba; 2418 ssize_t read_bytes; 2419 2420 if (count > (SE_UDEV_PATH_LEN-1)) { 2421 pr_err("udev_path count: %d exceeds" 2422 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 2423 SE_UDEV_PATH_LEN-1); 2424 return -EINVAL; 2425 } 2426 2427 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, 2428 "%s", page); 2429 if (!read_bytes) 2430 return -EINVAL; 2431 if (dev->udev_path[read_bytes - 1] == '\n') 2432 dev->udev_path[read_bytes - 1] = '\0'; 2433 2434 dev->dev_flags |= DF_USING_UDEV_PATH; 2435 2436 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 2437 config_item_name(&hba->hba_group.cg_item), 2438 config_item_name(&dev->dev_group.cg_item), 2439 dev->udev_path); 2440 2441 return read_bytes; 2442 } 2443 2444 static ssize_t target_dev_enable_show(struct config_item *item, char *page) 2445 { 2446 struct se_device *dev = to_device(item); 2447 2448 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev)); 2449 } 2450 2451 static ssize_t target_dev_enable_store(struct config_item *item, 2452 const char *page, size_t count) 2453 { 2454 struct se_device *dev = to_device(item); 2455 char *ptr; 2456 int ret; 2457 2458 ptr = strstr(page, "1"); 2459 if (!ptr) { 2460 pr_err("For dev_enable ops, only valid value" 2461 " is \"1\"\n"); 2462 return -EINVAL; 2463 } 2464 2465 ret = target_configure_device(dev); 2466 if (ret) 2467 return ret; 2468 return count; 2469 } 2470 2471 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page) 2472 { 2473 struct se_device *dev = to_device(item); 2474 struct config_item *lu_ci; 2475 struct t10_alua_lu_gp *lu_gp; 2476 struct t10_alua_lu_gp_member *lu_gp_mem; 2477 ssize_t len = 0; 2478 2479 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2480 if (!lu_gp_mem) 2481 return 0; 2482 2483 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2484 lu_gp = lu_gp_mem->lu_gp; 2485 if (lu_gp) { 2486 lu_ci = &lu_gp->lu_gp_group.cg_item; 2487 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 2488 config_item_name(lu_ci), lu_gp->lu_gp_id); 2489 } 2490 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2491 2492 return len; 2493 } 2494 2495 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item, 2496 const char *page, size_t count) 2497 { 2498 struct se_device *dev = to_device(item); 2499 struct se_hba *hba = dev->se_hba; 2500 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 2501 struct t10_alua_lu_gp_member *lu_gp_mem; 2502 unsigned char buf[LU_GROUP_NAME_BUF] = { }; 2503 int move = 0; 2504 2505 lu_gp_mem = dev->dev_alua_lu_gp_mem; 2506 if (!lu_gp_mem) 2507 return count; 2508 2509 if (count > LU_GROUP_NAME_BUF) { 2510 pr_err("ALUA LU Group Alias too large!\n"); 2511 return -EINVAL; 2512 } 2513 memcpy(buf, page, count); 2514 /* 2515 * Any ALUA logical unit alias besides "NULL" means we will be 2516 * making a new group association. 2517 */ 2518 if (strcmp(strstrip(buf), "NULL")) { 2519 /* 2520 * core_alua_get_lu_gp_by_name() will increment reference to 2521 * struct t10_alua_lu_gp. This reference is released with 2522 * core_alua_get_lu_gp_by_name below(). 2523 */ 2524 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 2525 if (!lu_gp_new) 2526 return -ENODEV; 2527 } 2528 2529 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 2530 lu_gp = lu_gp_mem->lu_gp; 2531 if (lu_gp) { 2532 /* 2533 * Clearing an existing lu_gp association, and replacing 2534 * with NULL 2535 */ 2536 if (!lu_gp_new) { 2537 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 2538 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 2539 " %hu\n", 2540 config_item_name(&hba->hba_group.cg_item), 2541 config_item_name(&dev->dev_group.cg_item), 2542 config_item_name(&lu_gp->lu_gp_group.cg_item), 2543 lu_gp->lu_gp_id); 2544 2545 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2546 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2547 2548 return count; 2549 } 2550 /* 2551 * Removing existing association of lu_gp_mem with lu_gp 2552 */ 2553 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 2554 move = 1; 2555 } 2556 /* 2557 * Associate lu_gp_mem with lu_gp_new. 2558 */ 2559 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 2560 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 2561 2562 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 2563 " core/alua/lu_gps/%s, ID: %hu\n", 2564 (move) ? "Moving" : "Adding", 2565 config_item_name(&hba->hba_group.cg_item), 2566 config_item_name(&dev->dev_group.cg_item), 2567 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 2568 lu_gp_new->lu_gp_id); 2569 2570 core_alua_put_lu_gp_from_name(lu_gp_new); 2571 return count; 2572 } 2573 2574 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page) 2575 { 2576 struct se_device *dev = to_device(item); 2577 struct t10_alua_lba_map *map; 2578 struct t10_alua_lba_map_member *mem; 2579 char *b = page; 2580 int bl = 0; 2581 char state; 2582 2583 spin_lock(&dev->t10_alua.lba_map_lock); 2584 if (!list_empty(&dev->t10_alua.lba_map_list)) 2585 bl += sprintf(b + bl, "%u %u\n", 2586 dev->t10_alua.lba_map_segment_size, 2587 dev->t10_alua.lba_map_segment_multiplier); 2588 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) { 2589 bl += sprintf(b + bl, "%llu %llu", 2590 map->lba_map_first_lba, map->lba_map_last_lba); 2591 list_for_each_entry(mem, &map->lba_map_mem_list, 2592 lba_map_mem_list) { 2593 switch (mem->lba_map_mem_alua_state) { 2594 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: 2595 state = 'O'; 2596 break; 2597 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: 2598 state = 'A'; 2599 break; 2600 case ALUA_ACCESS_STATE_STANDBY: 2601 state = 'S'; 2602 break; 2603 case ALUA_ACCESS_STATE_UNAVAILABLE: 2604 state = 'U'; 2605 break; 2606 default: 2607 state = '.'; 2608 break; 2609 } 2610 bl += sprintf(b + bl, " %d:%c", 2611 mem->lba_map_mem_alua_pg_id, state); 2612 } 2613 bl += sprintf(b + bl, "\n"); 2614 } 2615 spin_unlock(&dev->t10_alua.lba_map_lock); 2616 return bl; 2617 } 2618 2619 static ssize_t target_dev_lba_map_store(struct config_item *item, 2620 const char *page, size_t count) 2621 { 2622 struct se_device *dev = to_device(item); 2623 struct t10_alua_lba_map *lba_map = NULL; 2624 struct list_head lba_list; 2625 char *map_entries, *orig, *ptr; 2626 char state; 2627 int pg_num = -1, pg; 2628 int ret = 0, num = 0, pg_id, alua_state; 2629 unsigned long start_lba = -1, end_lba = -1; 2630 unsigned long segment_size = -1, segment_mult = -1; 2631 2632 orig = map_entries = kstrdup(page, GFP_KERNEL); 2633 if (!map_entries) 2634 return -ENOMEM; 2635 2636 INIT_LIST_HEAD(&lba_list); 2637 while ((ptr = strsep(&map_entries, "\n")) != NULL) { 2638 if (!*ptr) 2639 continue; 2640 2641 if (num == 0) { 2642 if (sscanf(ptr, "%lu %lu\n", 2643 &segment_size, &segment_mult) != 2) { 2644 pr_err("Invalid line %d\n", num); 2645 ret = -EINVAL; 2646 break; 2647 } 2648 num++; 2649 continue; 2650 } 2651 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) { 2652 pr_err("Invalid line %d\n", num); 2653 ret = -EINVAL; 2654 break; 2655 } 2656 ptr = strchr(ptr, ' '); 2657 if (!ptr) { 2658 pr_err("Invalid line %d, missing end lba\n", num); 2659 ret = -EINVAL; 2660 break; 2661 } 2662 ptr++; 2663 ptr = strchr(ptr, ' '); 2664 if (!ptr) { 2665 pr_err("Invalid line %d, missing state definitions\n", 2666 num); 2667 ret = -EINVAL; 2668 break; 2669 } 2670 ptr++; 2671 lba_map = core_alua_allocate_lba_map(&lba_list, 2672 start_lba, end_lba); 2673 if (IS_ERR(lba_map)) { 2674 ret = PTR_ERR(lba_map); 2675 break; 2676 } 2677 pg = 0; 2678 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) { 2679 switch (state) { 2680 case 'O': 2681 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED; 2682 break; 2683 case 'A': 2684 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED; 2685 break; 2686 case 'S': 2687 alua_state = ALUA_ACCESS_STATE_STANDBY; 2688 break; 2689 case 'U': 2690 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE; 2691 break; 2692 default: 2693 pr_err("Invalid ALUA state '%c'\n", state); 2694 ret = -EINVAL; 2695 goto out; 2696 } 2697 2698 ret = core_alua_allocate_lba_map_mem(lba_map, 2699 pg_id, alua_state); 2700 if (ret) { 2701 pr_err("Invalid target descriptor %d:%c " 2702 "at line %d\n", 2703 pg_id, state, num); 2704 break; 2705 } 2706 pg++; 2707 ptr = strchr(ptr, ' '); 2708 if (ptr) 2709 ptr++; 2710 else 2711 break; 2712 } 2713 if (pg_num == -1) 2714 pg_num = pg; 2715 else if (pg != pg_num) { 2716 pr_err("Only %d from %d port groups definitions " 2717 "at line %d\n", pg, pg_num, num); 2718 ret = -EINVAL; 2719 break; 2720 } 2721 num++; 2722 } 2723 out: 2724 if (ret) { 2725 core_alua_free_lba_map(&lba_list); 2726 count = ret; 2727 } else 2728 core_alua_set_lba_map(dev, &lba_list, 2729 segment_size, segment_mult); 2730 kfree(orig); 2731 return count; 2732 } 2733 2734 CONFIGFS_ATTR_RO(target_dev_, info); 2735 CONFIGFS_ATTR_WO(target_dev_, control); 2736 CONFIGFS_ATTR(target_dev_, alias); 2737 CONFIGFS_ATTR(target_dev_, udev_path); 2738 CONFIGFS_ATTR(target_dev_, enable); 2739 CONFIGFS_ATTR(target_dev_, alua_lu_gp); 2740 CONFIGFS_ATTR(target_dev_, lba_map); 2741 2742 static struct configfs_attribute *target_core_dev_attrs[] = { 2743 &target_dev_attr_info, 2744 &target_dev_attr_control, 2745 &target_dev_attr_alias, 2746 &target_dev_attr_udev_path, 2747 &target_dev_attr_enable, 2748 &target_dev_attr_alua_lu_gp, 2749 &target_dev_attr_lba_map, 2750 NULL, 2751 }; 2752 2753 static void target_core_dev_release(struct config_item *item) 2754 { 2755 struct config_group *dev_cg = to_config_group(item); 2756 struct se_device *dev = 2757 container_of(dev_cg, struct se_device, dev_group); 2758 2759 target_free_device(dev); 2760 } 2761 2762 /* 2763 * Used in target_core_fabric_configfs.c to verify valid se_device symlink 2764 * within target_fabric_port_link() 2765 */ 2766 struct configfs_item_operations target_core_dev_item_ops = { 2767 .release = target_core_dev_release, 2768 }; 2769 2770 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs); 2771 2772 /* End functions for struct config_item_type tb_dev_cit */ 2773 2774 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 2775 2776 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item) 2777 { 2778 return container_of(to_config_group(item), struct t10_alua_lu_gp, 2779 lu_gp_group); 2780 } 2781 2782 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page) 2783 { 2784 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2785 2786 if (!lu_gp->lu_gp_valid_id) 2787 return 0; 2788 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 2789 } 2790 2791 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item, 2792 const char *page, size_t count) 2793 { 2794 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2795 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 2796 unsigned long lu_gp_id; 2797 int ret; 2798 2799 ret = kstrtoul(page, 0, &lu_gp_id); 2800 if (ret < 0) { 2801 pr_err("kstrtoul() returned %d for" 2802 " lu_gp_id\n", ret); 2803 return ret; 2804 } 2805 if (lu_gp_id > 0x0000ffff) { 2806 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 2807 " 0x0000ffff\n", lu_gp_id); 2808 return -EINVAL; 2809 } 2810 2811 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 2812 if (ret < 0) 2813 return -EINVAL; 2814 2815 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 2816 " Group: core/alua/lu_gps/%s to ID: %hu\n", 2817 config_item_name(&alua_lu_gp_cg->cg_item), 2818 lu_gp->lu_gp_id); 2819 2820 return count; 2821 } 2822 2823 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page) 2824 { 2825 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item); 2826 struct t10_alua_lu_gp_member *lu_gp_mem; 2827 const char *const end = page + PAGE_SIZE; 2828 char *cur = page; 2829 2830 spin_lock(&lu_gp->lu_gp_lock); 2831 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 2832 struct se_device *dev = lu_gp_mem->lu_gp_mem_dev; 2833 struct se_hba *hba = dev->se_hba; 2834 2835 cur += scnprintf(cur, end - cur, "%s/%s\n", 2836 config_item_name(&hba->hba_group.cg_item), 2837 config_item_name(&dev->dev_group.cg_item)); 2838 if (WARN_ON_ONCE(cur >= end)) 2839 break; 2840 } 2841 spin_unlock(&lu_gp->lu_gp_lock); 2842 2843 return cur - page; 2844 } 2845 2846 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id); 2847 CONFIGFS_ATTR_RO(target_lu_gp_, members); 2848 2849 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 2850 &target_lu_gp_attr_lu_gp_id, 2851 &target_lu_gp_attr_members, 2852 NULL, 2853 }; 2854 2855 static void target_core_alua_lu_gp_release(struct config_item *item) 2856 { 2857 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2858 struct t10_alua_lu_gp, lu_gp_group); 2859 2860 core_alua_free_lu_gp(lu_gp); 2861 } 2862 2863 static const struct configfs_item_operations target_core_alua_lu_gp_ops = { 2864 .release = target_core_alua_lu_gp_release, 2865 }; 2866 2867 static const struct config_item_type target_core_alua_lu_gp_cit = { 2868 .ct_item_ops = &target_core_alua_lu_gp_ops, 2869 .ct_attrs = target_core_alua_lu_gp_attrs, 2870 .ct_owner = THIS_MODULE, 2871 }; 2872 2873 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 2874 2875 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 2876 2877 static struct config_group *target_core_alua_create_lu_gp( 2878 struct config_group *group, 2879 const char *name) 2880 { 2881 struct t10_alua_lu_gp *lu_gp; 2882 struct config_group *alua_lu_gp_cg = NULL; 2883 struct config_item *alua_lu_gp_ci = NULL; 2884 2885 lu_gp = core_alua_allocate_lu_gp(name, 0); 2886 if (IS_ERR(lu_gp)) 2887 return NULL; 2888 2889 alua_lu_gp_cg = &lu_gp->lu_gp_group; 2890 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 2891 2892 config_group_init_type_name(alua_lu_gp_cg, name, 2893 &target_core_alua_lu_gp_cit); 2894 2895 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 2896 " Group: core/alua/lu_gps/%s\n", 2897 config_item_name(alua_lu_gp_ci)); 2898 2899 return alua_lu_gp_cg; 2900 2901 } 2902 2903 static void target_core_alua_drop_lu_gp( 2904 struct config_group *group, 2905 struct config_item *item) 2906 { 2907 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 2908 struct t10_alua_lu_gp, lu_gp_group); 2909 2910 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 2911 " Group: core/alua/lu_gps/%s, ID: %hu\n", 2912 config_item_name(item), lu_gp->lu_gp_id); 2913 /* 2914 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 2915 * -> target_core_alua_lu_gp_release() 2916 */ 2917 config_item_put(item); 2918 } 2919 2920 static const struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 2921 .make_group = &target_core_alua_create_lu_gp, 2922 .drop_item = &target_core_alua_drop_lu_gp, 2923 }; 2924 2925 static const struct config_item_type target_core_alua_lu_gps_cit = { 2926 .ct_item_ops = NULL, 2927 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 2928 .ct_owner = THIS_MODULE, 2929 }; 2930 2931 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 2932 2933 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2934 2935 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item) 2936 { 2937 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp, 2938 tg_pt_gp_group); 2939 } 2940 2941 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item, 2942 char *page) 2943 { 2944 return sprintf(page, "%d\n", 2945 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state); 2946 } 2947 2948 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item, 2949 const char *page, size_t count) 2950 { 2951 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2952 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; 2953 unsigned long tmp; 2954 int new_state, ret; 2955 2956 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2957 pr_err("Unable to do implicit ALUA on invalid tg_pt_gp ID\n"); 2958 return -EINVAL; 2959 } 2960 if (!target_dev_configured(dev)) { 2961 pr_err("Unable to set alua_access_state while device is" 2962 " not configured\n"); 2963 return -ENODEV; 2964 } 2965 2966 ret = kstrtoul(page, 0, &tmp); 2967 if (ret < 0) { 2968 pr_err("Unable to extract new ALUA access state from" 2969 " %s\n", page); 2970 return ret; 2971 } 2972 new_state = (int)tmp; 2973 2974 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) { 2975 pr_err("Unable to process implicit configfs ALUA" 2976 " transition while TPGS_IMPLICIT_ALUA is disabled\n"); 2977 return -EINVAL; 2978 } 2979 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA && 2980 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) { 2981 /* LBA DEPENDENT is only allowed with implicit ALUA */ 2982 pr_err("Unable to process implicit configfs ALUA transition" 2983 " while explicit ALUA management is enabled\n"); 2984 return -EINVAL; 2985 } 2986 2987 ret = core_alua_do_port_transition(tg_pt_gp, dev, 2988 NULL, NULL, new_state, 0); 2989 return (!ret) ? count : -EINVAL; 2990 } 2991 2992 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item, 2993 char *page) 2994 { 2995 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 2996 return sprintf(page, "%s\n", 2997 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2998 } 2999 3000 static ssize_t target_tg_pt_gp_alua_access_status_store( 3001 struct config_item *item, const char *page, size_t count) 3002 { 3003 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3004 unsigned long tmp; 3005 int new_status, ret; 3006 3007 if (!tg_pt_gp->tg_pt_gp_valid_id) { 3008 pr_err("Unable to set ALUA access status on invalid tg_pt_gp ID\n"); 3009 return -EINVAL; 3010 } 3011 3012 ret = kstrtoul(page, 0, &tmp); 3013 if (ret < 0) { 3014 pr_err("Unable to extract new ALUA access status" 3015 " from %s\n", page); 3016 return ret; 3017 } 3018 new_status = (int)tmp; 3019 3020 if ((new_status != ALUA_STATUS_NONE) && 3021 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && 3022 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { 3023 pr_err("Illegal ALUA access status: 0x%02x\n", 3024 new_status); 3025 return -EINVAL; 3026 } 3027 3028 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 3029 return count; 3030 } 3031 3032 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item, 3033 char *page) 3034 { 3035 return core_alua_show_access_type(to_tg_pt_gp(item), page); 3036 } 3037 3038 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item, 3039 const char *page, size_t count) 3040 { 3041 return core_alua_store_access_type(to_tg_pt_gp(item), page, count); 3042 } 3043 3044 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \ 3045 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \ 3046 struct config_item *item, char *p) \ 3047 { \ 3048 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 3049 return sprintf(p, "%d\n", \ 3050 !!(t->tg_pt_gp_alua_supported_states & _bit)); \ 3051 } \ 3052 \ 3053 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \ 3054 struct config_item *item, const char *p, size_t c) \ 3055 { \ 3056 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \ 3057 unsigned long tmp; \ 3058 int ret; \ 3059 \ 3060 if (!t->tg_pt_gp_valid_id) { \ 3061 pr_err("Unable to set " #_name " ALUA state on invalid tg_pt_gp ID\n"); \ 3062 return -EINVAL; \ 3063 } \ 3064 \ 3065 ret = kstrtoul(p, 0, &tmp); \ 3066 if (ret < 0) { \ 3067 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \ 3068 return -EINVAL; \ 3069 } \ 3070 if (tmp > 1) { \ 3071 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \ 3072 return -EINVAL; \ 3073 } \ 3074 if (tmp) \ 3075 t->tg_pt_gp_alua_supported_states |= _bit; \ 3076 else \ 3077 t->tg_pt_gp_alua_supported_states &= ~_bit; \ 3078 \ 3079 return c; \ 3080 } 3081 3082 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP); 3083 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP); 3084 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP); 3085 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP); 3086 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP); 3087 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP); 3088 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP); 3089 3090 static ssize_t target_tg_pt_gp_alua_write_metadata_show( 3091 struct config_item *item, char *page) 3092 { 3093 return sprintf(page, "%d\n", 3094 to_tg_pt_gp(item)->tg_pt_gp_write_metadata); 3095 } 3096 3097 static ssize_t target_tg_pt_gp_alua_write_metadata_store( 3098 struct config_item *item, const char *page, size_t count) 3099 { 3100 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3101 unsigned long tmp; 3102 int ret; 3103 3104 ret = kstrtoul(page, 0, &tmp); 3105 if (ret < 0) { 3106 pr_err("Unable to extract alua_write_metadata\n"); 3107 return ret; 3108 } 3109 3110 if ((tmp != 0) && (tmp != 1)) { 3111 pr_err("Illegal value for alua_write_metadata:" 3112 " %lu\n", tmp); 3113 return -EINVAL; 3114 } 3115 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 3116 3117 return count; 3118 } 3119 3120 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item, 3121 char *page) 3122 { 3123 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page); 3124 } 3125 3126 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item, 3127 const char *page, size_t count) 3128 { 3129 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page, 3130 count); 3131 } 3132 3133 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item, 3134 char *page) 3135 { 3136 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page); 3137 } 3138 3139 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item, 3140 const char *page, size_t count) 3141 { 3142 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page, 3143 count); 3144 } 3145 3146 static ssize_t target_tg_pt_gp_implicit_trans_secs_show( 3147 struct config_item *item, char *page) 3148 { 3149 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page); 3150 } 3151 3152 static ssize_t target_tg_pt_gp_implicit_trans_secs_store( 3153 struct config_item *item, const char *page, size_t count) 3154 { 3155 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page, 3156 count); 3157 } 3158 3159 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item, 3160 char *page) 3161 { 3162 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page); 3163 } 3164 3165 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item, 3166 const char *page, size_t count) 3167 { 3168 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count); 3169 } 3170 3171 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item, 3172 char *page) 3173 { 3174 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3175 3176 if (!tg_pt_gp->tg_pt_gp_valid_id) 3177 return 0; 3178 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 3179 } 3180 3181 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item, 3182 const char *page, size_t count) 3183 { 3184 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3185 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 3186 unsigned long tg_pt_gp_id; 3187 int ret; 3188 3189 ret = kstrtoul(page, 0, &tg_pt_gp_id); 3190 if (ret < 0) { 3191 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n", 3192 page); 3193 return ret; 3194 } 3195 if (tg_pt_gp_id > 0x0000ffff) { 3196 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n", 3197 tg_pt_gp_id); 3198 return -EINVAL; 3199 } 3200 3201 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 3202 if (ret < 0) 3203 return -EINVAL; 3204 3205 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 3206 "core/alua/tg_pt_gps/%s to ID: %hu\n", 3207 config_item_name(&alua_tg_pt_gp_cg->cg_item), 3208 tg_pt_gp->tg_pt_gp_id); 3209 3210 return count; 3211 } 3212 3213 static ssize_t target_tg_pt_gp_members_show(struct config_item *item, 3214 char *page) 3215 { 3216 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item); 3217 struct se_lun *lun; 3218 ssize_t len = 0, cur_len; 3219 unsigned char buf[TG_PT_GROUP_NAME_BUF] = { }; 3220 3221 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 3222 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, 3223 lun_tg_pt_gp_link) { 3224 struct se_portal_group *tpg = lun->lun_tpg; 3225 3226 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 3227 "/%s\n", tpg->se_tpg_tfo->fabric_name, 3228 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 3229 tpg->se_tpg_tfo->tpg_get_tag(tpg), 3230 config_item_name(&lun->lun_group.cg_item)); 3231 cur_len++; /* Extra byte for NULL terminator */ 3232 3233 if ((cur_len + len) > PAGE_SIZE) { 3234 pr_warn("Ran out of lu_gp_show_attr" 3235 "_members buffer\n"); 3236 break; 3237 } 3238 memcpy(page+len, buf, cur_len); 3239 len += cur_len; 3240 } 3241 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 3242 3243 return len; 3244 } 3245 3246 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state); 3247 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status); 3248 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type); 3249 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning); 3250 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline); 3251 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent); 3252 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable); 3253 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby); 3254 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized); 3255 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized); 3256 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata); 3257 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs); 3258 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs); 3259 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs); 3260 CONFIGFS_ATTR(target_tg_pt_gp_, preferred); 3261 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id); 3262 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members); 3263 3264 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 3265 &target_tg_pt_gp_attr_alua_access_state, 3266 &target_tg_pt_gp_attr_alua_access_status, 3267 &target_tg_pt_gp_attr_alua_access_type, 3268 &target_tg_pt_gp_attr_alua_support_transitioning, 3269 &target_tg_pt_gp_attr_alua_support_offline, 3270 &target_tg_pt_gp_attr_alua_support_lba_dependent, 3271 &target_tg_pt_gp_attr_alua_support_unavailable, 3272 &target_tg_pt_gp_attr_alua_support_standby, 3273 &target_tg_pt_gp_attr_alua_support_active_nonoptimized, 3274 &target_tg_pt_gp_attr_alua_support_active_optimized, 3275 &target_tg_pt_gp_attr_alua_write_metadata, 3276 &target_tg_pt_gp_attr_nonop_delay_msecs, 3277 &target_tg_pt_gp_attr_trans_delay_msecs, 3278 &target_tg_pt_gp_attr_implicit_trans_secs, 3279 &target_tg_pt_gp_attr_preferred, 3280 &target_tg_pt_gp_attr_tg_pt_gp_id, 3281 &target_tg_pt_gp_attr_members, 3282 NULL, 3283 }; 3284 3285 static void target_core_alua_tg_pt_gp_release(struct config_item *item) 3286 { 3287 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3288 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3289 3290 core_alua_free_tg_pt_gp(tg_pt_gp); 3291 } 3292 3293 static const struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 3294 .release = target_core_alua_tg_pt_gp_release, 3295 }; 3296 3297 static const struct config_item_type target_core_alua_tg_pt_gp_cit = { 3298 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 3299 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 3300 .ct_owner = THIS_MODULE, 3301 }; 3302 3303 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 3304 3305 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3306 3307 static struct config_group *target_core_alua_create_tg_pt_gp( 3308 struct config_group *group, 3309 const char *name) 3310 { 3311 struct t10_alua *alua = container_of(group, struct t10_alua, 3312 alua_tg_pt_gps_group); 3313 struct t10_alua_tg_pt_gp *tg_pt_gp; 3314 struct config_group *alua_tg_pt_gp_cg = NULL; 3315 struct config_item *alua_tg_pt_gp_ci = NULL; 3316 3317 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0); 3318 if (!tg_pt_gp) 3319 return NULL; 3320 3321 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 3322 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 3323 3324 config_group_init_type_name(alua_tg_pt_gp_cg, name, 3325 &target_core_alua_tg_pt_gp_cit); 3326 3327 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 3328 " Group: alua/tg_pt_gps/%s\n", 3329 config_item_name(alua_tg_pt_gp_ci)); 3330 3331 return alua_tg_pt_gp_cg; 3332 } 3333 3334 static void target_core_alua_drop_tg_pt_gp( 3335 struct config_group *group, 3336 struct config_item *item) 3337 { 3338 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 3339 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 3340 3341 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 3342 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 3343 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 3344 /* 3345 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 3346 * -> target_core_alua_tg_pt_gp_release(). 3347 */ 3348 config_item_put(item); 3349 } 3350 3351 static const struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 3352 .make_group = &target_core_alua_create_tg_pt_gp, 3353 .drop_item = &target_core_alua_drop_tg_pt_gp, 3354 }; 3355 3356 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL); 3357 3358 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 3359 3360 /* Start functions for struct config_item_type target_core_alua_cit */ 3361 3362 /* 3363 * target_core_alua_cit is a ConfigFS group that lives under 3364 * /sys/kernel/config/target/core/alua. There are default groups 3365 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 3366 * target_core_alua_cit in target_core_init_configfs() below. 3367 */ 3368 static const struct config_item_type target_core_alua_cit = { 3369 .ct_item_ops = NULL, 3370 .ct_attrs = NULL, 3371 .ct_owner = THIS_MODULE, 3372 }; 3373 3374 /* End functions for struct config_item_type target_core_alua_cit */ 3375 3376 /* Start functions for struct config_item_type tb_dev_stat_cit */ 3377 3378 static struct config_group *target_core_stat_mkdir( 3379 struct config_group *group, 3380 const char *name) 3381 { 3382 return ERR_PTR(-ENOSYS); 3383 } 3384 3385 static void target_core_stat_rmdir( 3386 struct config_group *group, 3387 struct config_item *item) 3388 { 3389 return; 3390 } 3391 3392 static const struct configfs_group_operations target_core_stat_group_ops = { 3393 .make_group = &target_core_stat_mkdir, 3394 .drop_item = &target_core_stat_rmdir, 3395 }; 3396 3397 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL); 3398 3399 /* End functions for struct config_item_type tb_dev_stat_cit */ 3400 3401 /* Start functions for struct config_item_type target_core_hba_cit */ 3402 3403 static struct config_group *target_core_make_subdev( 3404 struct config_group *group, 3405 const char *name) 3406 { 3407 struct t10_alua_tg_pt_gp *tg_pt_gp; 3408 struct config_item *hba_ci = &group->cg_item; 3409 struct se_hba *hba = item_to_hba(hba_ci); 3410 struct target_backend *tb = hba->backend; 3411 struct se_device *dev; 3412 int errno = -ENOMEM, ret; 3413 3414 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 3415 if (ret) 3416 return ERR_PTR(ret); 3417 3418 dev = target_alloc_device(hba, name); 3419 if (!dev) 3420 goto out_unlock; 3421 3422 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit); 3423 3424 config_group_init_type_name(&dev->dev_action_group, "action", 3425 &tb->tb_dev_action_cit); 3426 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group); 3427 3428 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib", 3429 &tb->tb_dev_attrib_cit); 3430 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group); 3431 3432 config_group_init_type_name(&dev->dev_pr_group, "pr", 3433 &tb->tb_dev_pr_cit); 3434 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group); 3435 3436 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn", 3437 &tb->tb_dev_wwn_cit); 3438 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group, 3439 &dev->dev_group); 3440 3441 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group, 3442 "alua", &tb->tb_dev_alua_tg_pt_gps_cit); 3443 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group, 3444 &dev->dev_group); 3445 3446 config_group_init_type_name(&dev->dev_stat_grps.stat_group, 3447 "statistics", &tb->tb_dev_stat_cit); 3448 configfs_add_default_group(&dev->dev_stat_grps.stat_group, 3449 &dev->dev_group); 3450 3451 /* 3452 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 3453 */ 3454 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1); 3455 if (!tg_pt_gp) 3456 goto out_free_device; 3457 dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 3458 3459 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 3460 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 3461 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group, 3462 &dev->t10_alua.alua_tg_pt_gps_group); 3463 3464 /* 3465 * Add core/$HBA/$DEV/statistics/ default groups 3466 */ 3467 target_stat_setup_dev_default_groups(dev); 3468 3469 mutex_lock(&target_devices_lock); 3470 target_devices++; 3471 mutex_unlock(&target_devices_lock); 3472 3473 mutex_unlock(&hba->hba_access_mutex); 3474 return &dev->dev_group; 3475 3476 out_free_device: 3477 target_free_device(dev); 3478 out_unlock: 3479 mutex_unlock(&hba->hba_access_mutex); 3480 return ERR_PTR(errno); 3481 } 3482 3483 static void target_core_drop_subdev( 3484 struct config_group *group, 3485 struct config_item *item) 3486 { 3487 struct config_group *dev_cg = to_config_group(item); 3488 struct se_device *dev = 3489 container_of(dev_cg, struct se_device, dev_group); 3490 struct se_hba *hba; 3491 3492 hba = item_to_hba(&dev->se_hba->hba_group.cg_item); 3493 3494 mutex_lock(&hba->hba_access_mutex); 3495 3496 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group); 3497 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group); 3498 3499 /* 3500 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 3501 * directly from target_core_alua_tg_pt_gp_release(). 3502 */ 3503 dev->t10_alua.default_tg_pt_gp = NULL; 3504 3505 configfs_remove_default_groups(dev_cg); 3506 3507 /* 3508 * se_dev is released from target_core_dev_item_ops->release() 3509 */ 3510 config_item_put(item); 3511 3512 mutex_lock(&target_devices_lock); 3513 target_devices--; 3514 mutex_unlock(&target_devices_lock); 3515 3516 mutex_unlock(&hba->hba_access_mutex); 3517 } 3518 3519 static const struct configfs_group_operations target_core_hba_group_ops = { 3520 .make_group = target_core_make_subdev, 3521 .drop_item = target_core_drop_subdev, 3522 }; 3523 3524 3525 static inline struct se_hba *to_hba(struct config_item *item) 3526 { 3527 return container_of(to_config_group(item), struct se_hba, hba_group); 3528 } 3529 3530 static ssize_t target_hba_info_show(struct config_item *item, char *page) 3531 { 3532 struct se_hba *hba = to_hba(item); 3533 3534 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 3535 hba->hba_id, hba->backend->ops->name, 3536 TARGET_CORE_VERSION); 3537 } 3538 3539 static ssize_t target_hba_mode_show(struct config_item *item, char *page) 3540 { 3541 struct se_hba *hba = to_hba(item); 3542 int hba_mode = 0; 3543 3544 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 3545 hba_mode = 1; 3546 3547 return sprintf(page, "%d\n", hba_mode); 3548 } 3549 3550 static ssize_t target_hba_mode_store(struct config_item *item, 3551 const char *page, size_t count) 3552 { 3553 struct se_hba *hba = to_hba(item); 3554 unsigned long mode_flag; 3555 int ret; 3556 3557 if (hba->backend->ops->pmode_enable_hba == NULL) 3558 return -EINVAL; 3559 3560 ret = kstrtoul(page, 0, &mode_flag); 3561 if (ret < 0) { 3562 pr_err("Unable to extract hba mode flag: %d\n", ret); 3563 return ret; 3564 } 3565 3566 if (hba->dev_count) { 3567 pr_err("Unable to set hba_mode with active devices\n"); 3568 return -EINVAL; 3569 } 3570 3571 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag); 3572 if (ret < 0) 3573 return -EINVAL; 3574 if (ret > 0) 3575 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 3576 else if (ret == 0) 3577 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 3578 3579 return count; 3580 } 3581 3582 CONFIGFS_ATTR_RO(target_, hba_info); 3583 CONFIGFS_ATTR(target_, hba_mode); 3584 3585 static void target_core_hba_release(struct config_item *item) 3586 { 3587 struct se_hba *hba = container_of(to_config_group(item), 3588 struct se_hba, hba_group); 3589 core_delete_hba(hba); 3590 } 3591 3592 static struct configfs_attribute *target_core_hba_attrs[] = { 3593 &target_attr_hba_info, 3594 &target_attr_hba_mode, 3595 NULL, 3596 }; 3597 3598 static const struct configfs_item_operations target_core_hba_item_ops = { 3599 .release = target_core_hba_release, 3600 }; 3601 3602 static const struct config_item_type target_core_hba_cit = { 3603 .ct_item_ops = &target_core_hba_item_ops, 3604 .ct_group_ops = &target_core_hba_group_ops, 3605 .ct_attrs = target_core_hba_attrs, 3606 .ct_owner = THIS_MODULE, 3607 }; 3608 3609 static struct config_group *target_core_call_addhbatotarget( 3610 struct config_group *group, 3611 const char *name) 3612 { 3613 char *se_plugin_str, *str, *str2; 3614 struct se_hba *hba; 3615 char buf[TARGET_CORE_NAME_MAX_LEN] = { }; 3616 unsigned long plugin_dep_id = 0; 3617 int ret; 3618 3619 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 3620 pr_err("Passed *name strlen(): %d exceeds" 3621 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 3622 TARGET_CORE_NAME_MAX_LEN); 3623 return ERR_PTR(-ENAMETOOLONG); 3624 } 3625 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 3626 3627 str = strstr(buf, "_"); 3628 if (!str) { 3629 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 3630 return ERR_PTR(-EINVAL); 3631 } 3632 se_plugin_str = buf; 3633 /* 3634 * Special case for subsystem plugins that have "_" in their names. 3635 * Namely rd_direct and rd_mcp.. 3636 */ 3637 str2 = strstr(str+1, "_"); 3638 if (str2) { 3639 *str2 = '\0'; /* Terminate for *se_plugin_str */ 3640 str2++; /* Skip to start of plugin dependent ID */ 3641 str = str2; 3642 } else { 3643 *str = '\0'; /* Terminate for *se_plugin_str */ 3644 str++; /* Skip to start of plugin dependent ID */ 3645 } 3646 3647 ret = kstrtoul(str, 0, &plugin_dep_id); 3648 if (ret < 0) { 3649 pr_err("kstrtoul() returned %d for" 3650 " plugin_dep_id\n", ret); 3651 return ERR_PTR(ret); 3652 } 3653 /* 3654 * Load up TCM subsystem plugins if they have not already been loaded. 3655 */ 3656 transport_subsystem_check_init(); 3657 3658 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 3659 if (IS_ERR(hba)) 3660 return ERR_CAST(hba); 3661 3662 config_group_init_type_name(&hba->hba_group, name, 3663 &target_core_hba_cit); 3664 3665 return &hba->hba_group; 3666 } 3667 3668 static void target_core_call_delhbafromtarget( 3669 struct config_group *group, 3670 struct config_item *item) 3671 { 3672 /* 3673 * core_delete_hba() is called from target_core_hba_item_ops->release() 3674 * -> target_core_hba_release() 3675 */ 3676 config_item_put(item); 3677 } 3678 3679 static const struct configfs_group_operations target_core_group_ops = { 3680 .make_group = target_core_call_addhbatotarget, 3681 .drop_item = target_core_call_delhbafromtarget, 3682 }; 3683 3684 static const struct config_item_type target_core_cit = { 3685 .ct_item_ops = NULL, 3686 .ct_group_ops = &target_core_group_ops, 3687 .ct_attrs = NULL, 3688 .ct_owner = THIS_MODULE, 3689 }; 3690 3691 /* Stop functions for struct config_item_type target_core_hba_cit */ 3692 3693 void target_setup_backend_cits(struct target_backend *tb) 3694 { 3695 target_core_setup_dev_cit(tb); 3696 target_core_setup_dev_action_cit(tb); 3697 target_core_setup_dev_attrib_cit(tb); 3698 target_core_setup_dev_pr_cit(tb); 3699 target_core_setup_dev_wwn_cit(tb); 3700 target_core_setup_dev_alua_tg_pt_gps_cit(tb); 3701 target_core_setup_dev_stat_cit(tb); 3702 } 3703 3704 static void target_init_dbroot(void) 3705 { 3706 struct file *fp; 3707 3708 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED); 3709 fp = filp_open(db_root_stage, O_RDONLY, 0); 3710 if (IS_ERR(fp)) { 3711 pr_err("db_root: cannot open: %s\n", db_root_stage); 3712 return; 3713 } 3714 if (!S_ISDIR(file_inode(fp)->i_mode)) { 3715 filp_close(fp, NULL); 3716 pr_err("db_root: not a valid directory: %s\n", db_root_stage); 3717 return; 3718 } 3719 filp_close(fp, NULL); 3720 3721 strscpy(db_root, db_root_stage); 3722 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); 3723 } 3724 3725 static int __init target_core_init_configfs(void) 3726 { 3727 struct configfs_subsystem *subsys = &target_core_fabrics; 3728 struct t10_alua_lu_gp *lu_gp; 3729 int ret; 3730 3731 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 3732 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 3733 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 3734 3735 config_group_init(&subsys->su_group); 3736 mutex_init(&subsys->su_mutex); 3737 3738 ret = init_se_kmem_caches(); 3739 if (ret < 0) 3740 return ret; 3741 /* 3742 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 3743 * and ALUA Logical Unit Group and Target Port Group infrastructure. 3744 */ 3745 config_group_init_type_name(&target_core_hbagroup, "core", 3746 &target_core_cit); 3747 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group); 3748 3749 /* 3750 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 3751 */ 3752 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit); 3753 configfs_add_default_group(&alua_group, &target_core_hbagroup); 3754 3755 /* 3756 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 3757 * groups under /sys/kernel/config/target/core/alua/ 3758 */ 3759 config_group_init_type_name(&alua_lu_gps_group, "lu_gps", 3760 &target_core_alua_lu_gps_cit); 3761 configfs_add_default_group(&alua_lu_gps_group, &alua_group); 3762 3763 /* 3764 * Add core/alua/lu_gps/default_lu_gp 3765 */ 3766 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 3767 if (IS_ERR(lu_gp)) { 3768 ret = -ENOMEM; 3769 goto out_global; 3770 } 3771 3772 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 3773 &target_core_alua_lu_gp_cit); 3774 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group); 3775 3776 default_lu_gp = lu_gp; 3777 3778 /* 3779 * Register the target_core_mod subsystem with configfs. 3780 */ 3781 ret = configfs_register_subsystem(subsys); 3782 if (ret < 0) { 3783 pr_err("Error %d while registering subsystem %s\n", 3784 ret, subsys->su_group.cg_item.ci_namebuf); 3785 goto out_global; 3786 } 3787 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 3788 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s" 3789 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 3790 /* 3791 * Register built-in RAMDISK subsystem logic for virtual LUN 0 3792 */ 3793 ret = rd_module_init(); 3794 if (ret < 0) 3795 goto out; 3796 3797 ret = core_dev_setup_virtual_lun0(); 3798 if (ret < 0) 3799 goto out; 3800 3801 ret = target_xcopy_setup_pt(); 3802 if (ret < 0) 3803 goto out; 3804 3805 scoped_with_kernel_creds() 3806 target_init_dbroot(); 3807 3808 return 0; 3809 3810 out: 3811 target_xcopy_release_pt(); 3812 configfs_unregister_subsystem(subsys); 3813 core_dev_release_virtual_lun0(); 3814 rd_module_exit(); 3815 out_global: 3816 if (default_lu_gp) { 3817 core_alua_free_lu_gp(default_lu_gp); 3818 default_lu_gp = NULL; 3819 } 3820 release_se_kmem_caches(); 3821 return ret; 3822 } 3823 3824 static void __exit target_core_exit_configfs(void) 3825 { 3826 configfs_remove_default_groups(&alua_lu_gps_group); 3827 configfs_remove_default_groups(&alua_group); 3828 configfs_remove_default_groups(&target_core_hbagroup); 3829 3830 /* 3831 * We expect subsys->su_group.default_groups to be released 3832 * by configfs subsystem provider logic.. 3833 */ 3834 configfs_unregister_subsystem(&target_core_fabrics); 3835 3836 core_alua_free_lu_gp(default_lu_gp); 3837 default_lu_gp = NULL; 3838 3839 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3840 " Infrastructure\n"); 3841 3842 core_dev_release_virtual_lun0(); 3843 rd_module_exit(); 3844 target_xcopy_release_pt(); 3845 release_se_kmem_caches(); 3846 } 3847 3848 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3849 MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3850 MODULE_LICENSE("GPL"); 3851 3852 module_init(target_core_init_configfs); 3853 module_exit(target_core_exit_configfs); 3854