1/******************************************************************************* 2 * Filename: target_core_configfs.c 3 * 4 * This file contains ConfigFS logic for the Generic Target Engine project. 5 * 6 * (c) Copyright 2008-2013 Datera, Inc. 7 * 8 * Nicholas A. Bellinger <nab@kernel.org> 9 * 10 * based on configfs Copyright (C) 2005 Oracle. All rights reserved. 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License as published by 14 * the Free Software Foundation; either version 2 of the License, or 15 * (at your option) any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 ****************************************************************************/ 22 23#include <linux/module.h> 24#include <linux/moduleparam.h> 25#include <generated/utsrelease.h> 26#include <linux/utsname.h> 27#include <linux/init.h> 28#include <linux/fs.h> 29#include <linux/namei.h> 30#include <linux/slab.h> 31#include <linux/types.h> 32#include <linux/delay.h> 33#include <linux/unistd.h> 34#include <linux/string.h> 35#include <linux/parser.h> 36#include <linux/syscalls.h> 37#include <linux/configfs.h> 38#include <linux/spinlock.h> 39 40#include <target/target_core_base.h> 41#include <target/target_core_backend.h> 42#include <target/target_core_fabric.h> 43#include <target/target_core_fabric_configfs.h> 44#include <target/target_core_configfs.h> 45#include <target/configfs_macros.h> 46 47#include "target_core_internal.h" 48#include "target_core_alua.h" 49#include "target_core_pr.h" 50#include "target_core_rd.h" 51#include "target_core_xcopy.h" 52 53#define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \ 54static void target_core_setup_##_name##_cit(struct se_subsystem_api *sa) \ 55{ \ 56 struct target_backend_cits *tbc = &sa->tb_cits; \ 57 struct config_item_type *cit = &tbc->tb_##_name##_cit; \ 58 \ 59 cit->ct_item_ops = _item_ops; \ 60 cit->ct_group_ops = _group_ops; \ 61 cit->ct_attrs = _attrs; \ 62 cit->ct_owner = sa->owner; \ 63 pr_debug("Setup generic %s\n", __stringify(_name)); \ 64} 65 66extern struct t10_alua_lu_gp *default_lu_gp; 67 68static LIST_HEAD(g_tf_list); 69static DEFINE_MUTEX(g_tf_lock); 70 71struct target_core_configfs_attribute { 72 struct configfs_attribute attr; 73 ssize_t (*show)(void *, char *); 74 ssize_t (*store)(void *, const char *, size_t); 75}; 76 77static struct config_group target_core_hbagroup; 78static struct config_group alua_group; 79static struct config_group alua_lu_gps_group; 80 81static inline struct se_hba * 82item_to_hba(struct config_item *item) 83{ 84 return container_of(to_config_group(item), struct se_hba, hba_group); 85} 86 87/* 88 * Attributes for /sys/kernel/config/target/ 89 */ 90static ssize_t target_core_attr_show(struct config_item *item, 91 struct configfs_attribute *attr, 92 char *page) 93{ 94 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s" 95 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION, 96 utsname()->sysname, utsname()->machine); 97} 98 99static struct configfs_item_operations target_core_fabric_item_ops = { 100 .show_attribute = target_core_attr_show, 101}; 102 103static struct configfs_attribute target_core_item_attr_version = { 104 .ca_owner = THIS_MODULE, 105 .ca_name = "version", 106 .ca_mode = S_IRUGO, 107}; 108 109static struct target_fabric_configfs *target_core_get_fabric( 110 const char *name) 111{ 112 struct target_fabric_configfs *tf; 113 114 if (!name) 115 return NULL; 116 117 mutex_lock(&g_tf_lock); 118 list_for_each_entry(tf, &g_tf_list, tf_list) { 119 if (!strcmp(tf->tf_name, name)) { 120 atomic_inc(&tf->tf_access_cnt); 121 mutex_unlock(&g_tf_lock); 122 return tf; 123 } 124 } 125 mutex_unlock(&g_tf_lock); 126 127 return NULL; 128} 129 130/* 131 * Called from struct target_core_group_ops->make_group() 132 */ 133static struct config_group *target_core_register_fabric( 134 struct config_group *group, 135 const char *name) 136{ 137 struct target_fabric_configfs *tf; 138 int ret; 139 140 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:" 141 " %s\n", group, name); 142 143 tf = target_core_get_fabric(name); 144 if (!tf) { 145 pr_debug("target_core_register_fabric() trying autoload for %s\n", 146 name); 147 148 /* 149 * Below are some hardcoded request_module() calls to automatically 150 * local fabric modules when the following is called: 151 * 152 * mkdir -p /sys/kernel/config/target/$MODULE_NAME 153 * 154 * Note that this does not limit which TCM fabric module can be 155 * registered, but simply provids auto loading logic for modules with 156 * mkdir(2) system calls with known TCM fabric modules. 157 */ 158 159 if (!strncmp(name, "iscsi", 5)) { 160 /* 161 * Automatically load the LIO Target fabric module when the 162 * following is called: 163 * 164 * mkdir -p $CONFIGFS/target/iscsi 165 */ 166 ret = request_module("iscsi_target_mod"); 167 if (ret < 0) { 168 pr_debug("request_module() failed for" 169 " iscsi_target_mod.ko: %d\n", ret); 170 return ERR_PTR(-EINVAL); 171 } 172 } else if (!strncmp(name, "loopback", 8)) { 173 /* 174 * Automatically load the tcm_loop fabric module when the 175 * following is called: 176 * 177 * mkdir -p $CONFIGFS/target/loopback 178 */ 179 ret = request_module("tcm_loop"); 180 if (ret < 0) { 181 pr_debug("request_module() failed for" 182 " tcm_loop.ko: %d\n", ret); 183 return ERR_PTR(-EINVAL); 184 } 185 } 186 187 tf = target_core_get_fabric(name); 188 } 189 190 if (!tf) { 191 pr_debug("target_core_get_fabric() failed for %s\n", 192 name); 193 return ERR_PTR(-EINVAL); 194 } 195 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:" 196 " %s\n", tf->tf_name); 197 /* 198 * On a successful target_core_get_fabric() look, the returned 199 * struct target_fabric_configfs *tf will contain a usage reference. 200 */ 201 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n", 202 &tf->tf_cit_tmpl.tfc_wwn_cit); 203 204 tf->tf_group.default_groups = tf->tf_default_groups; 205 tf->tf_group.default_groups[0] = &tf->tf_disc_group; 206 tf->tf_group.default_groups[1] = NULL; 207 208 config_group_init_type_name(&tf->tf_group, name, 209 &tf->tf_cit_tmpl.tfc_wwn_cit); 210 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth", 211 &tf->tf_cit_tmpl.tfc_discovery_cit); 212 213 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:" 214 " %s\n", tf->tf_group.cg_item.ci_name); 215 tf->tf_fabric = &tf->tf_group.cg_item; 216 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric" 217 " for %s\n", name); 218 219 return &tf->tf_group; 220} 221 222/* 223 * Called from struct target_core_group_ops->drop_item() 224 */ 225static void target_core_deregister_fabric( 226 struct config_group *group, 227 struct config_item *item) 228{ 229 struct target_fabric_configfs *tf = container_of( 230 to_config_group(item), struct target_fabric_configfs, tf_group); 231 struct config_group *tf_group; 232 struct config_item *df_item; 233 int i; 234 235 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in" 236 " tf list\n", config_item_name(item)); 237 238 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:" 239 " %s\n", tf->tf_name); 240 atomic_dec(&tf->tf_access_cnt); 241 242 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing" 243 " tf->tf_fabric for %s\n", tf->tf_name); 244 tf->tf_fabric = NULL; 245 246 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci" 247 " %s\n", config_item_name(item)); 248 249 tf_group = &tf->tf_group; 250 for (i = 0; tf_group->default_groups[i]; i++) { 251 df_item = &tf_group->default_groups[i]->cg_item; 252 tf_group->default_groups[i] = NULL; 253 config_item_put(df_item); 254 } 255 config_item_put(item); 256} 257 258static struct configfs_group_operations target_core_fabric_group_ops = { 259 .make_group = &target_core_register_fabric, 260 .drop_item = &target_core_deregister_fabric, 261}; 262 263/* 264 * All item attributes appearing in /sys/kernel/target/ appear here. 265 */ 266static struct configfs_attribute *target_core_fabric_item_attrs[] = { 267 &target_core_item_attr_version, 268 NULL, 269}; 270 271/* 272 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/ 273 */ 274static struct config_item_type target_core_fabrics_item = { 275 .ct_item_ops = &target_core_fabric_item_ops, 276 .ct_group_ops = &target_core_fabric_group_ops, 277 .ct_attrs = target_core_fabric_item_attrs, 278 .ct_owner = THIS_MODULE, 279}; 280 281static struct configfs_subsystem target_core_fabrics = { 282 .su_group = { 283 .cg_item = { 284 .ci_namebuf = "target", 285 .ci_type = &target_core_fabrics_item, 286 }, 287 }, 288}; 289 290int target_depend_item(struct config_item *item) 291{ 292 return configfs_depend_item(&target_core_fabrics, item); 293} 294EXPORT_SYMBOL(target_depend_item); 295 296void target_undepend_item(struct config_item *item) 297{ 298 return configfs_undepend_item(&target_core_fabrics, item); 299} 300EXPORT_SYMBOL(target_undepend_item); 301 302/*############################################################################## 303// Start functions called by external Target Fabrics Modules 304//############################################################################*/ 305 306static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo) 307{ 308 if (!tfo->name) { 309 pr_err("Missing tfo->name\n"); 310 return -EINVAL; 311 } 312 if (strlen(tfo->name) >= TARGET_FABRIC_NAME_SIZE) { 313 pr_err("Passed name: %s exceeds TARGET_FABRIC" 314 "_NAME_SIZE\n", tfo->name); 315 return -EINVAL; 316 } 317 if (!tfo->get_fabric_name) { 318 pr_err("Missing tfo->get_fabric_name()\n"); 319 return -EINVAL; 320 } 321 if (!tfo->get_fabric_proto_ident) { 322 pr_err("Missing tfo->get_fabric_proto_ident()\n"); 323 return -EINVAL; 324 } 325 if (!tfo->tpg_get_wwn) { 326 pr_err("Missing tfo->tpg_get_wwn()\n"); 327 return -EINVAL; 328 } 329 if (!tfo->tpg_get_tag) { 330 pr_err("Missing tfo->tpg_get_tag()\n"); 331 return -EINVAL; 332 } 333 if (!tfo->tpg_get_default_depth) { 334 pr_err("Missing tfo->tpg_get_default_depth()\n"); 335 return -EINVAL; 336 } 337 if (!tfo->tpg_get_pr_transport_id) { 338 pr_err("Missing tfo->tpg_get_pr_transport_id()\n"); 339 return -EINVAL; 340 } 341 if (!tfo->tpg_get_pr_transport_id_len) { 342 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n"); 343 return -EINVAL; 344 } 345 if (!tfo->tpg_check_demo_mode) { 346 pr_err("Missing tfo->tpg_check_demo_mode()\n"); 347 return -EINVAL; 348 } 349 if (!tfo->tpg_check_demo_mode_cache) { 350 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n"); 351 return -EINVAL; 352 } 353 if (!tfo->tpg_check_demo_mode_write_protect) { 354 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n"); 355 return -EINVAL; 356 } 357 if (!tfo->tpg_check_prod_mode_write_protect) { 358 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n"); 359 return -EINVAL; 360 } 361 if (!tfo->tpg_alloc_fabric_acl) { 362 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n"); 363 return -EINVAL; 364 } 365 if (!tfo->tpg_release_fabric_acl) { 366 pr_err("Missing tfo->tpg_release_fabric_acl()\n"); 367 return -EINVAL; 368 } 369 if (!tfo->tpg_get_inst_index) { 370 pr_err("Missing tfo->tpg_get_inst_index()\n"); 371 return -EINVAL; 372 } 373 if (!tfo->release_cmd) { 374 pr_err("Missing tfo->release_cmd()\n"); 375 return -EINVAL; 376 } 377 if (!tfo->shutdown_session) { 378 pr_err("Missing tfo->shutdown_session()\n"); 379 return -EINVAL; 380 } 381 if (!tfo->close_session) { 382 pr_err("Missing tfo->close_session()\n"); 383 return -EINVAL; 384 } 385 if (!tfo->sess_get_index) { 386 pr_err("Missing tfo->sess_get_index()\n"); 387 return -EINVAL; 388 } 389 if (!tfo->write_pending) { 390 pr_err("Missing tfo->write_pending()\n"); 391 return -EINVAL; 392 } 393 if (!tfo->write_pending_status) { 394 pr_err("Missing tfo->write_pending_status()\n"); 395 return -EINVAL; 396 } 397 if (!tfo->set_default_node_attributes) { 398 pr_err("Missing tfo->set_default_node_attributes()\n"); 399 return -EINVAL; 400 } 401 if (!tfo->get_task_tag) { 402 pr_err("Missing tfo->get_task_tag()\n"); 403 return -EINVAL; 404 } 405 if (!tfo->get_cmd_state) { 406 pr_err("Missing tfo->get_cmd_state()\n"); 407 return -EINVAL; 408 } 409 if (!tfo->queue_data_in) { 410 pr_err("Missing tfo->queue_data_in()\n"); 411 return -EINVAL; 412 } 413 if (!tfo->queue_status) { 414 pr_err("Missing tfo->queue_status()\n"); 415 return -EINVAL; 416 } 417 if (!tfo->queue_tm_rsp) { 418 pr_err("Missing tfo->queue_tm_rsp()\n"); 419 return -EINVAL; 420 } 421 if (!tfo->aborted_task) { 422 pr_err("Missing tfo->aborted_task()\n"); 423 return -EINVAL; 424 } 425 /* 426 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn() 427 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in 428 * target_core_fabric_configfs.c WWN+TPG group context code. 429 */ 430 if (!tfo->fabric_make_wwn) { 431 pr_err("Missing tfo->fabric_make_wwn()\n"); 432 return -EINVAL; 433 } 434 if (!tfo->fabric_drop_wwn) { 435 pr_err("Missing tfo->fabric_drop_wwn()\n"); 436 return -EINVAL; 437 } 438 if (!tfo->fabric_make_tpg) { 439 pr_err("Missing tfo->fabric_make_tpg()\n"); 440 return -EINVAL; 441 } 442 if (!tfo->fabric_drop_tpg) { 443 pr_err("Missing tfo->fabric_drop_tpg()\n"); 444 return -EINVAL; 445 } 446 447 return 0; 448} 449 450int target_register_template(const struct target_core_fabric_ops *fo) 451{ 452 struct target_fabric_configfs *tf; 453 int ret; 454 455 ret = target_fabric_tf_ops_check(fo); 456 if (ret) 457 return ret; 458 459 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL); 460 if (!tf) { 461 pr_err("%s: could not allocate memory!\n", __func__); 462 return -ENOMEM; 463 } 464 465 INIT_LIST_HEAD(&tf->tf_list); 466 atomic_set(&tf->tf_access_cnt, 0); 467 468 /* 469 * Setup the default generic struct config_item_type's (cits) in 470 * struct target_fabric_configfs->tf_cit_tmpl 471 */ 472 tf->tf_module = fo->module; 473 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", fo->name); 474 475 tf->tf_ops = *fo; 476 target_fabric_setup_cits(tf); 477 478 mutex_lock(&g_tf_lock); 479 list_add_tail(&tf->tf_list, &g_tf_list); 480 mutex_unlock(&g_tf_lock); 481 482 return 0; 483} 484EXPORT_SYMBOL(target_register_template); 485 486void target_unregister_template(const struct target_core_fabric_ops *fo) 487{ 488 struct target_fabric_configfs *t; 489 490 mutex_lock(&g_tf_lock); 491 list_for_each_entry(t, &g_tf_list, tf_list) { 492 if (!strcmp(t->tf_name, fo->name)) { 493 BUG_ON(atomic_read(&t->tf_access_cnt)); 494 list_del(&t->tf_list); 495 kfree(t); 496 break; 497 } 498 } 499 mutex_unlock(&g_tf_lock); 500} 501EXPORT_SYMBOL(target_unregister_template); 502 503/*############################################################################## 504// Stop functions called by external Target Fabrics Modules 505//############################################################################*/ 506 507/* Start functions for struct config_item_type tb_dev_attrib_cit */ 508 509CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib); 510CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group); 511 512static struct configfs_item_operations target_core_dev_attrib_ops = { 513 .show_attribute = target_core_dev_attrib_attr_show, 514 .store_attribute = target_core_dev_attrib_attr_store, 515}; 516 517TB_CIT_SETUP(dev_attrib, &target_core_dev_attrib_ops, NULL, NULL); 518 519/* End functions for struct config_item_type tb_dev_attrib_cit */ 520 521/* Start functions for struct config_item_type tb_dev_wwn_cit */ 522 523CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn); 524#define SE_DEV_WWN_ATTR(_name, _mode) \ 525static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \ 526 __CONFIGFS_EATTR(_name, _mode, \ 527 target_core_dev_wwn_show_attr_##_name, \ 528 target_core_dev_wwn_store_attr_##_name); 529 530#define SE_DEV_WWN_ATTR_RO(_name); \ 531do { \ 532 static struct target_core_dev_wwn_attribute \ 533 target_core_dev_wwn_##_name = \ 534 __CONFIGFS_EATTR_RO(_name, \ 535 target_core_dev_wwn_show_attr_##_name); \ 536} while (0); 537 538/* 539 * VPD page 0x80 Unit serial 540 */ 541static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial( 542 struct t10_wwn *t10_wwn, 543 char *page) 544{ 545 return sprintf(page, "T10 VPD Unit Serial Number: %s\n", 546 &t10_wwn->unit_serial[0]); 547} 548 549static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial( 550 struct t10_wwn *t10_wwn, 551 const char *page, 552 size_t count) 553{ 554 struct se_device *dev = t10_wwn->t10_dev; 555 unsigned char buf[INQUIRY_VPD_SERIAL_LEN]; 556 557 /* 558 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial 559 * from the struct scsi_device level firmware, do not allow 560 * VPD Unit Serial to be emulated. 561 * 562 * Note this struct scsi_device could also be emulating VPD 563 * information from its drivers/scsi LLD. But for now we assume 564 * it is doing 'the right thing' wrt a world wide unique 565 * VPD Unit Serial Number that OS dependent multipath can depend on. 566 */ 567 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) { 568 pr_err("Underlying SCSI device firmware provided VPD" 569 " Unit Serial, ignoring request\n"); 570 return -EOPNOTSUPP; 571 } 572 573 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { 574 pr_err("Emulated VPD Unit Serial exceeds" 575 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); 576 return -EOVERFLOW; 577 } 578 /* 579 * Check to see if any active $FABRIC_MOD exports exist. If they 580 * do exist, fail here as changing this information on the fly 581 * (underneath the initiator side OS dependent multipath code) 582 * could cause negative effects. 583 */ 584 if (dev->export_count) { 585 pr_err("Unable to set VPD Unit Serial while" 586 " active %d $FABRIC_MOD exports exist\n", 587 dev->export_count); 588 return -EINVAL; 589 } 590 591 /* 592 * This currently assumes ASCII encoding for emulated VPD Unit Serial. 593 * 594 * Also, strip any newline added from the userspace 595 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial 596 */ 597 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN); 598 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); 599 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, 600 "%s", strstrip(buf)); 601 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL; 602 603 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" 604 " %s\n", dev->t10_wwn.unit_serial); 605 606 return count; 607} 608 609SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR); 610 611/* 612 * VPD page 0x83 Protocol Identifier 613 */ 614static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier( 615 struct t10_wwn *t10_wwn, 616 char *page) 617{ 618 struct t10_vpd *vpd; 619 unsigned char buf[VPD_TMP_BUF_SIZE]; 620 ssize_t len = 0; 621 622 memset(buf, 0, VPD_TMP_BUF_SIZE); 623 624 spin_lock(&t10_wwn->t10_vpd_lock); 625 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { 626 if (!vpd->protocol_identifier_set) 627 continue; 628 629 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); 630 631 if (len + strlen(buf) >= PAGE_SIZE) 632 break; 633 634 len += sprintf(page+len, "%s", buf); 635 } 636 spin_unlock(&t10_wwn->t10_vpd_lock); 637 638 return len; 639} 640 641static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier( 642 struct t10_wwn *t10_wwn, 643 const char *page, 644 size_t count) 645{ 646 return -ENOSYS; 647} 648 649SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR); 650 651/* 652 * Generic wrapper for dumping VPD identifiers by association. 653 */ 654#define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ 655static ssize_t target_core_dev_wwn_show_attr_##_name( \ 656 struct t10_wwn *t10_wwn, \ 657 char *page) \ 658{ \ 659 struct t10_vpd *vpd; \ 660 unsigned char buf[VPD_TMP_BUF_SIZE]; \ 661 ssize_t len = 0; \ 662 \ 663 spin_lock(&t10_wwn->t10_vpd_lock); \ 664 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ 665 if (vpd->association != _assoc) \ 666 continue; \ 667 \ 668 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 669 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ 670 if (len + strlen(buf) >= PAGE_SIZE) \ 671 break; \ 672 len += sprintf(page+len, "%s", buf); \ 673 \ 674 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 675 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ 676 if (len + strlen(buf) >= PAGE_SIZE) \ 677 break; \ 678 len += sprintf(page+len, "%s", buf); \ 679 \ 680 memset(buf, 0, VPD_TMP_BUF_SIZE); \ 681 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ 682 if (len + strlen(buf) >= PAGE_SIZE) \ 683 break; \ 684 len += sprintf(page+len, "%s", buf); \ 685 } \ 686 spin_unlock(&t10_wwn->t10_vpd_lock); \ 687 \ 688 return len; \ 689} 690 691/* 692 * VPD page 0x83 Association: Logical Unit 693 */ 694DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); 695 696static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit( 697 struct t10_wwn *t10_wwn, 698 const char *page, 699 size_t count) 700{ 701 return -ENOSYS; 702} 703 704SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR); 705 706/* 707 * VPD page 0x83 Association: Target Port 708 */ 709DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); 710 711static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port( 712 struct t10_wwn *t10_wwn, 713 const char *page, 714 size_t count) 715{ 716 return -ENOSYS; 717} 718 719SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR); 720 721/* 722 * VPD page 0x83 Association: SCSI Target Device 723 */ 724DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); 725 726static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device( 727 struct t10_wwn *t10_wwn, 728 const char *page, 729 size_t count) 730{ 731 return -ENOSYS; 732} 733 734SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR); 735 736CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group); 737 738static struct configfs_attribute *target_core_dev_wwn_attrs[] = { 739 &target_core_dev_wwn_vpd_unit_serial.attr, 740 &target_core_dev_wwn_vpd_protocol_identifier.attr, 741 &target_core_dev_wwn_vpd_assoc_logical_unit.attr, 742 &target_core_dev_wwn_vpd_assoc_target_port.attr, 743 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr, 744 NULL, 745}; 746 747static struct configfs_item_operations target_core_dev_wwn_ops = { 748 .show_attribute = target_core_dev_wwn_attr_show, 749 .store_attribute = target_core_dev_wwn_attr_store, 750}; 751 752TB_CIT_SETUP(dev_wwn, &target_core_dev_wwn_ops, NULL, target_core_dev_wwn_attrs); 753 754/* End functions for struct config_item_type tb_dev_wwn_cit */ 755 756/* Start functions for struct config_item_type tb_dev_pr_cit */ 757 758CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device); 759#define SE_DEV_PR_ATTR(_name, _mode) \ 760static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 761 __CONFIGFS_EATTR(_name, _mode, \ 762 target_core_dev_pr_show_attr_##_name, \ 763 target_core_dev_pr_store_attr_##_name); 764 765#define SE_DEV_PR_ATTR_RO(_name); \ 766static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ 767 __CONFIGFS_EATTR_RO(_name, \ 768 target_core_dev_pr_show_attr_##_name); 769 770static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev, 771 char *page) 772{ 773 struct se_node_acl *se_nacl; 774 struct t10_pr_registration *pr_reg; 775 char i_buf[PR_REG_ISID_ID_LEN]; 776 777 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 778 779 pr_reg = dev->dev_pr_res_holder; 780 if (!pr_reg) 781 return sprintf(page, "No SPC-3 Reservation holder\n"); 782 783 se_nacl = pr_reg->pr_reg_nacl; 784 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); 785 786 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", 787 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 788 se_nacl->initiatorname, i_buf); 789} 790 791static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, 792 char *page) 793{ 794 struct se_node_acl *se_nacl; 795 ssize_t len; 796 797 se_nacl = dev->dev_reserved_node_acl; 798 if (se_nacl) { 799 len = sprintf(page, 800 "SPC-2 Reservation: %s Initiator: %s\n", 801 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 802 se_nacl->initiatorname); 803 } else { 804 len = sprintf(page, "No SPC-2 Reservation holder\n"); 805 } 806 return len; 807} 808 809static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev, 810 char *page) 811{ 812 int ret; 813 814 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) 815 return sprintf(page, "Passthrough\n"); 816 817 spin_lock(&dev->dev_reservation_lock); 818 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 819 ret = target_core_dev_pr_show_spc2_res(dev, page); 820 else 821 ret = target_core_dev_pr_show_spc3_res(dev, page); 822 spin_unlock(&dev->dev_reservation_lock); 823 return ret; 824} 825 826SE_DEV_PR_ATTR_RO(res_holder); 827 828static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts( 829 struct se_device *dev, char *page) 830{ 831 ssize_t len = 0; 832 833 spin_lock(&dev->dev_reservation_lock); 834 if (!dev->dev_pr_res_holder) { 835 len = sprintf(page, "No SPC-3 Reservation holder\n"); 836 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { 837 len = sprintf(page, "SPC-3 Reservation: All Target" 838 " Ports registration\n"); 839 } else { 840 len = sprintf(page, "SPC-3 Reservation: Single" 841 " Target Port registration\n"); 842 } 843 844 spin_unlock(&dev->dev_reservation_lock); 845 return len; 846} 847 848SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts); 849 850static ssize_t target_core_dev_pr_show_attr_res_pr_generation( 851 struct se_device *dev, char *page) 852{ 853 return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation); 854} 855 856SE_DEV_PR_ATTR_RO(res_pr_generation); 857 858/* 859 * res_pr_holder_tg_port 860 */ 861static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port( 862 struct se_device *dev, char *page) 863{ 864 struct se_node_acl *se_nacl; 865 struct se_lun *lun; 866 struct se_portal_group *se_tpg; 867 struct t10_pr_registration *pr_reg; 868 const struct target_core_fabric_ops *tfo; 869 ssize_t len = 0; 870 871 spin_lock(&dev->dev_reservation_lock); 872 pr_reg = dev->dev_pr_res_holder; 873 if (!pr_reg) { 874 len = sprintf(page, "No SPC-3 Reservation holder\n"); 875 goto out_unlock; 876 } 877 878 se_nacl = pr_reg->pr_reg_nacl; 879 se_tpg = se_nacl->se_tpg; 880 lun = pr_reg->pr_reg_tg_pt_lun; 881 tfo = se_tpg->se_tpg_tfo; 882 883 len += sprintf(page+len, "SPC-3 Reservation: %s" 884 " Target Node Endpoint: %s\n", tfo->get_fabric_name(), 885 tfo->tpg_get_wwn(se_tpg)); 886 len += sprintf(page+len, "SPC-3 Reservation: Relative Port" 887 " Identifier Tag: %hu %s Portal Group Tag: %hu" 888 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi, 889 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg), 890 tfo->get_fabric_name(), lun->unpacked_lun); 891 892out_unlock: 893 spin_unlock(&dev->dev_reservation_lock); 894 return len; 895} 896 897SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port); 898 899static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts( 900 struct se_device *dev, char *page) 901{ 902 const struct target_core_fabric_ops *tfo; 903 struct t10_pr_registration *pr_reg; 904 unsigned char buf[384]; 905 char i_buf[PR_REG_ISID_ID_LEN]; 906 ssize_t len = 0; 907 int reg_count = 0; 908 909 len += sprintf(page+len, "SPC-3 PR Registrations:\n"); 910 911 spin_lock(&dev->t10_pr.registration_lock); 912 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, 913 pr_reg_list) { 914 915 memset(buf, 0, 384); 916 memset(i_buf, 0, PR_REG_ISID_ID_LEN); 917 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 918 core_pr_dump_initiator_port(pr_reg, i_buf, 919 PR_REG_ISID_ID_LEN); 920 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", 921 tfo->get_fabric_name(), 922 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, 923 pr_reg->pr_res_generation); 924 925 if (len + strlen(buf) >= PAGE_SIZE) 926 break; 927 928 len += sprintf(page+len, "%s", buf); 929 reg_count++; 930 } 931 spin_unlock(&dev->t10_pr.registration_lock); 932 933 if (!reg_count) 934 len += sprintf(page+len, "None\n"); 935 936 return len; 937} 938 939SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts); 940 941static ssize_t target_core_dev_pr_show_attr_res_pr_type( 942 struct se_device *dev, char *page) 943{ 944 struct t10_pr_registration *pr_reg; 945 ssize_t len = 0; 946 947 spin_lock(&dev->dev_reservation_lock); 948 pr_reg = dev->dev_pr_res_holder; 949 if (pr_reg) { 950 len = sprintf(page, "SPC-3 Reservation Type: %s\n", 951 core_scsi3_pr_dump_type(pr_reg->pr_res_type)); 952 } else { 953 len = sprintf(page, "No SPC-3 Reservation holder\n"); 954 } 955 956 spin_unlock(&dev->dev_reservation_lock); 957 return len; 958} 959 960SE_DEV_PR_ATTR_RO(res_pr_type); 961 962static ssize_t target_core_dev_pr_show_attr_res_type( 963 struct se_device *dev, char *page) 964{ 965 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) 966 return sprintf(page, "SPC_PASSTHROUGH\n"); 967 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 968 return sprintf(page, "SPC2_RESERVATIONS\n"); 969 else 970 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); 971} 972 973SE_DEV_PR_ATTR_RO(res_type); 974 975static ssize_t target_core_dev_pr_show_attr_res_aptpl_active( 976 struct se_device *dev, char *page) 977{ 978 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) 979 return 0; 980 981 return sprintf(page, "APTPL Bit Status: %s\n", 982 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); 983} 984 985SE_DEV_PR_ATTR_RO(res_aptpl_active); 986 987/* 988 * res_aptpl_metadata 989 */ 990static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata( 991 struct se_device *dev, char *page) 992{ 993 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) 994 return 0; 995 996 return sprintf(page, "Ready to process PR APTPL metadata..\n"); 997} 998 999enum { 1000 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, 1001 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, 1002 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, 1003 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err 1004}; 1005 1006static match_table_t tokens = { 1007 {Opt_initiator_fabric, "initiator_fabric=%s"}, 1008 {Opt_initiator_node, "initiator_node=%s"}, 1009 {Opt_initiator_sid, "initiator_sid=%s"}, 1010 {Opt_sa_res_key, "sa_res_key=%s"}, 1011 {Opt_res_holder, "res_holder=%d"}, 1012 {Opt_res_type, "res_type=%d"}, 1013 {Opt_res_scope, "res_scope=%d"}, 1014 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, 1015 {Opt_mapped_lun, "mapped_lun=%d"}, 1016 {Opt_target_fabric, "target_fabric=%s"}, 1017 {Opt_target_node, "target_node=%s"}, 1018 {Opt_tpgt, "tpgt=%d"}, 1019 {Opt_port_rtpi, "port_rtpi=%d"}, 1020 {Opt_target_lun, "target_lun=%d"}, 1021 {Opt_err, NULL} 1022}; 1023 1024static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata( 1025 struct se_device *dev, 1026 const char *page, 1027 size_t count) 1028{ 1029 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; 1030 unsigned char *t_fabric = NULL, *t_port = NULL; 1031 char *orig, *ptr, *opts; 1032 substring_t args[MAX_OPT_ARGS]; 1033 unsigned long long tmp_ll; 1034 u64 sa_res_key = 0; 1035 u32 mapped_lun = 0, target_lun = 0; 1036 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; 1037 u16 port_rpti = 0, tpgt = 0; 1038 u8 type = 0, scope; 1039 1040 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) 1041 return 0; 1042 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) 1043 return 0; 1044 1045 if (dev->export_count) { 1046 pr_debug("Unable to process APTPL metadata while" 1047 " active fabric exports exist\n"); 1048 return -EINVAL; 1049 } 1050 1051 opts = kstrdup(page, GFP_KERNEL); 1052 if (!opts) 1053 return -ENOMEM; 1054 1055 orig = opts; 1056 while ((ptr = strsep(&opts, ",\n")) != NULL) { 1057 if (!*ptr) 1058 continue; 1059 1060 token = match_token(ptr, tokens, args); 1061 switch (token) { 1062 case Opt_initiator_fabric: 1063 i_fabric = match_strdup(args); 1064 if (!i_fabric) { 1065 ret = -ENOMEM; 1066 goto out; 1067 } 1068 break; 1069 case Opt_initiator_node: 1070 i_port = match_strdup(args); 1071 if (!i_port) { 1072 ret = -ENOMEM; 1073 goto out; 1074 } 1075 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { 1076 pr_err("APTPL metadata initiator_node=" 1077 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", 1078 PR_APTPL_MAX_IPORT_LEN); 1079 ret = -EINVAL; 1080 break; 1081 } 1082 break; 1083 case Opt_initiator_sid: 1084 isid = match_strdup(args); 1085 if (!isid) { 1086 ret = -ENOMEM; 1087 goto out; 1088 } 1089 if (strlen(isid) >= PR_REG_ISID_LEN) { 1090 pr_err("APTPL metadata initiator_isid" 1091 "= exceeds PR_REG_ISID_LEN: %d\n", 1092 PR_REG_ISID_LEN); 1093 ret = -EINVAL; 1094 break; 1095 } 1096 break; 1097 case Opt_sa_res_key: 1098 ret = kstrtoull(args->from, 0, &tmp_ll); 1099 if (ret < 0) { 1100 pr_err("kstrtoull() failed for sa_res_key=\n"); 1101 goto out; 1102 } 1103 sa_res_key = (u64)tmp_ll; 1104 break; 1105 /* 1106 * PR APTPL Metadata for Reservation 1107 */ 1108 case Opt_res_holder: 1109 match_int(args, &arg); 1110 res_holder = arg; 1111 break; 1112 case Opt_res_type: 1113 match_int(args, &arg); 1114 type = (u8)arg; 1115 break; 1116 case Opt_res_scope: 1117 match_int(args, &arg); 1118 scope = (u8)arg; 1119 break; 1120 case Opt_res_all_tg_pt: 1121 match_int(args, &arg); 1122 all_tg_pt = (int)arg; 1123 break; 1124 case Opt_mapped_lun: 1125 match_int(args, &arg); 1126 mapped_lun = (u32)arg; 1127 break; 1128 /* 1129 * PR APTPL Metadata for Target Port 1130 */ 1131 case Opt_target_fabric: 1132 t_fabric = match_strdup(args); 1133 if (!t_fabric) { 1134 ret = -ENOMEM; 1135 goto out; 1136 } 1137 break; 1138 case Opt_target_node: 1139 t_port = match_strdup(args); 1140 if (!t_port) { 1141 ret = -ENOMEM; 1142 goto out; 1143 } 1144 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { 1145 pr_err("APTPL metadata target_node=" 1146 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", 1147 PR_APTPL_MAX_TPORT_LEN); 1148 ret = -EINVAL; 1149 break; 1150 } 1151 break; 1152 case Opt_tpgt: 1153 match_int(args, &arg); 1154 tpgt = (u16)arg; 1155 break; 1156 case Opt_port_rtpi: 1157 match_int(args, &arg); 1158 port_rpti = (u16)arg; 1159 break; 1160 case Opt_target_lun: 1161 match_int(args, &arg); 1162 target_lun = (u32)arg; 1163 break; 1164 default: 1165 break; 1166 } 1167 } 1168 1169 if (!i_port || !t_port || !sa_res_key) { 1170 pr_err("Illegal parameters for APTPL registration\n"); 1171 ret = -EINVAL; 1172 goto out; 1173 } 1174 1175 if (res_holder && !(type)) { 1176 pr_err("Illegal PR type: 0x%02x for reservation" 1177 " holder\n", type); 1178 ret = -EINVAL; 1179 goto out; 1180 } 1181 1182 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, 1183 i_port, isid, mapped_lun, t_port, tpgt, target_lun, 1184 res_holder, all_tg_pt, type); 1185out: 1186 kfree(i_fabric); 1187 kfree(i_port); 1188 kfree(isid); 1189 kfree(t_fabric); 1190 kfree(t_port); 1191 kfree(orig); 1192 return (ret == 0) ? count : ret; 1193} 1194 1195SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR); 1196 1197CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group); 1198 1199static struct configfs_attribute *target_core_dev_pr_attrs[] = { 1200 &target_core_dev_pr_res_holder.attr, 1201 &target_core_dev_pr_res_pr_all_tgt_pts.attr, 1202 &target_core_dev_pr_res_pr_generation.attr, 1203 &target_core_dev_pr_res_pr_holder_tg_port.attr, 1204 &target_core_dev_pr_res_pr_registered_i_pts.attr, 1205 &target_core_dev_pr_res_pr_type.attr, 1206 &target_core_dev_pr_res_type.attr, 1207 &target_core_dev_pr_res_aptpl_active.attr, 1208 &target_core_dev_pr_res_aptpl_metadata.attr, 1209 NULL, 1210}; 1211 1212static struct configfs_item_operations target_core_dev_pr_ops = { 1213 .show_attribute = target_core_dev_pr_attr_show, 1214 .store_attribute = target_core_dev_pr_attr_store, 1215}; 1216 1217TB_CIT_SETUP(dev_pr, &target_core_dev_pr_ops, NULL, target_core_dev_pr_attrs); 1218 1219/* End functions for struct config_item_type tb_dev_pr_cit */ 1220 1221/* Start functions for struct config_item_type tb_dev_cit */ 1222 1223static ssize_t target_core_show_dev_info(void *p, char *page) 1224{ 1225 struct se_device *dev = p; 1226 struct se_subsystem_api *t = dev->transport; 1227 int bl = 0; 1228 ssize_t read_bytes = 0; 1229 1230 transport_dump_dev_state(dev, page, &bl); 1231 read_bytes += bl; 1232 read_bytes += t->show_configfs_dev_params(dev, page+read_bytes); 1233 return read_bytes; 1234} 1235 1236static struct target_core_configfs_attribute target_core_attr_dev_info = { 1237 .attr = { .ca_owner = THIS_MODULE, 1238 .ca_name = "info", 1239 .ca_mode = S_IRUGO }, 1240 .show = target_core_show_dev_info, 1241 .store = NULL, 1242}; 1243 1244static ssize_t target_core_store_dev_control( 1245 void *p, 1246 const char *page, 1247 size_t count) 1248{ 1249 struct se_device *dev = p; 1250 struct se_subsystem_api *t = dev->transport; 1251 1252 return t->set_configfs_dev_params(dev, page, count); 1253} 1254 1255static struct target_core_configfs_attribute target_core_attr_dev_control = { 1256 .attr = { .ca_owner = THIS_MODULE, 1257 .ca_name = "control", 1258 .ca_mode = S_IWUSR }, 1259 .show = NULL, 1260 .store = target_core_store_dev_control, 1261}; 1262 1263static ssize_t target_core_show_dev_alias(void *p, char *page) 1264{ 1265 struct se_device *dev = p; 1266 1267 if (!(dev->dev_flags & DF_USING_ALIAS)) 1268 return 0; 1269 1270 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); 1271} 1272 1273static ssize_t target_core_store_dev_alias( 1274 void *p, 1275 const char *page, 1276 size_t count) 1277{ 1278 struct se_device *dev = p; 1279 struct se_hba *hba = dev->se_hba; 1280 ssize_t read_bytes; 1281 1282 if (count > (SE_DEV_ALIAS_LEN-1)) { 1283 pr_err("alias count: %d exceeds" 1284 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, 1285 SE_DEV_ALIAS_LEN-1); 1286 return -EINVAL; 1287 } 1288 1289 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); 1290 if (!read_bytes) 1291 return -EINVAL; 1292 if (dev->dev_alias[read_bytes - 1] == '\n') 1293 dev->dev_alias[read_bytes - 1] = '\0'; 1294 1295 dev->dev_flags |= DF_USING_ALIAS; 1296 1297 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", 1298 config_item_name(&hba->hba_group.cg_item), 1299 config_item_name(&dev->dev_group.cg_item), 1300 dev->dev_alias); 1301 1302 return read_bytes; 1303} 1304 1305static struct target_core_configfs_attribute target_core_attr_dev_alias = { 1306 .attr = { .ca_owner = THIS_MODULE, 1307 .ca_name = "alias", 1308 .ca_mode = S_IRUGO | S_IWUSR }, 1309 .show = target_core_show_dev_alias, 1310 .store = target_core_store_dev_alias, 1311}; 1312 1313static ssize_t target_core_show_dev_udev_path(void *p, char *page) 1314{ 1315 struct se_device *dev = p; 1316 1317 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) 1318 return 0; 1319 1320 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); 1321} 1322 1323static ssize_t target_core_store_dev_udev_path( 1324 void *p, 1325 const char *page, 1326 size_t count) 1327{ 1328 struct se_device *dev = p; 1329 struct se_hba *hba = dev->se_hba; 1330 ssize_t read_bytes; 1331 1332 if (count > (SE_UDEV_PATH_LEN-1)) { 1333 pr_err("udev_path count: %d exceeds" 1334 " SE_UDEV_PATH_LEN-1: %u\n", (int)count, 1335 SE_UDEV_PATH_LEN-1); 1336 return -EINVAL; 1337 } 1338 1339 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, 1340 "%s", page); 1341 if (!read_bytes) 1342 return -EINVAL; 1343 if (dev->udev_path[read_bytes - 1] == '\n') 1344 dev->udev_path[read_bytes - 1] = '\0'; 1345 1346 dev->dev_flags |= DF_USING_UDEV_PATH; 1347 1348 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", 1349 config_item_name(&hba->hba_group.cg_item), 1350 config_item_name(&dev->dev_group.cg_item), 1351 dev->udev_path); 1352 1353 return read_bytes; 1354} 1355 1356static struct target_core_configfs_attribute target_core_attr_dev_udev_path = { 1357 .attr = { .ca_owner = THIS_MODULE, 1358 .ca_name = "udev_path", 1359 .ca_mode = S_IRUGO | S_IWUSR }, 1360 .show = target_core_show_dev_udev_path, 1361 .store = target_core_store_dev_udev_path, 1362}; 1363 1364static ssize_t target_core_show_dev_enable(void *p, char *page) 1365{ 1366 struct se_device *dev = p; 1367 1368 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED)); 1369} 1370 1371static ssize_t target_core_store_dev_enable( 1372 void *p, 1373 const char *page, 1374 size_t count) 1375{ 1376 struct se_device *dev = p; 1377 char *ptr; 1378 int ret; 1379 1380 ptr = strstr(page, "1"); 1381 if (!ptr) { 1382 pr_err("For dev_enable ops, only valid value" 1383 " is \"1\"\n"); 1384 return -EINVAL; 1385 } 1386 1387 ret = target_configure_device(dev); 1388 if (ret) 1389 return ret; 1390 return count; 1391} 1392 1393static struct target_core_configfs_attribute target_core_attr_dev_enable = { 1394 .attr = { .ca_owner = THIS_MODULE, 1395 .ca_name = "enable", 1396 .ca_mode = S_IRUGO | S_IWUSR }, 1397 .show = target_core_show_dev_enable, 1398 .store = target_core_store_dev_enable, 1399}; 1400 1401static ssize_t target_core_show_alua_lu_gp(void *p, char *page) 1402{ 1403 struct se_device *dev = p; 1404 struct config_item *lu_ci; 1405 struct t10_alua_lu_gp *lu_gp; 1406 struct t10_alua_lu_gp_member *lu_gp_mem; 1407 ssize_t len = 0; 1408 1409 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1410 if (!lu_gp_mem) 1411 return 0; 1412 1413 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1414 lu_gp = lu_gp_mem->lu_gp; 1415 if (lu_gp) { 1416 lu_ci = &lu_gp->lu_gp_group.cg_item; 1417 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", 1418 config_item_name(lu_ci), lu_gp->lu_gp_id); 1419 } 1420 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1421 1422 return len; 1423} 1424 1425static ssize_t target_core_store_alua_lu_gp( 1426 void *p, 1427 const char *page, 1428 size_t count) 1429{ 1430 struct se_device *dev = p; 1431 struct se_hba *hba = dev->se_hba; 1432 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; 1433 struct t10_alua_lu_gp_member *lu_gp_mem; 1434 unsigned char buf[LU_GROUP_NAME_BUF]; 1435 int move = 0; 1436 1437 lu_gp_mem = dev->dev_alua_lu_gp_mem; 1438 if (!lu_gp_mem) 1439 return 0; 1440 1441 if (count > LU_GROUP_NAME_BUF) { 1442 pr_err("ALUA LU Group Alias too large!\n"); 1443 return -EINVAL; 1444 } 1445 memset(buf, 0, LU_GROUP_NAME_BUF); 1446 memcpy(buf, page, count); 1447 /* 1448 * Any ALUA logical unit alias besides "NULL" means we will be 1449 * making a new group association. 1450 */ 1451 if (strcmp(strstrip(buf), "NULL")) { 1452 /* 1453 * core_alua_get_lu_gp_by_name() will increment reference to 1454 * struct t10_alua_lu_gp. This reference is released with 1455 * core_alua_get_lu_gp_by_name below(). 1456 */ 1457 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); 1458 if (!lu_gp_new) 1459 return -ENODEV; 1460 } 1461 1462 spin_lock(&lu_gp_mem->lu_gp_mem_lock); 1463 lu_gp = lu_gp_mem->lu_gp; 1464 if (lu_gp) { 1465 /* 1466 * Clearing an existing lu_gp association, and replacing 1467 * with NULL 1468 */ 1469 if (!lu_gp_new) { 1470 pr_debug("Target_Core_ConfigFS: Releasing %s/%s" 1471 " from ALUA LU Group: core/alua/lu_gps/%s, ID:" 1472 " %hu\n", 1473 config_item_name(&hba->hba_group.cg_item), 1474 config_item_name(&dev->dev_group.cg_item), 1475 config_item_name(&lu_gp->lu_gp_group.cg_item), 1476 lu_gp->lu_gp_id); 1477 1478 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 1479 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1480 1481 return count; 1482 } 1483 /* 1484 * Removing existing association of lu_gp_mem with lu_gp 1485 */ 1486 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); 1487 move = 1; 1488 } 1489 /* 1490 * Associate lu_gp_mem with lu_gp_new. 1491 */ 1492 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); 1493 spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 1494 1495 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:" 1496 " core/alua/lu_gps/%s, ID: %hu\n", 1497 (move) ? "Moving" : "Adding", 1498 config_item_name(&hba->hba_group.cg_item), 1499 config_item_name(&dev->dev_group.cg_item), 1500 config_item_name(&lu_gp_new->lu_gp_group.cg_item), 1501 lu_gp_new->lu_gp_id); 1502 1503 core_alua_put_lu_gp_from_name(lu_gp_new); 1504 return count; 1505} 1506 1507static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = { 1508 .attr = { .ca_owner = THIS_MODULE, 1509 .ca_name = "alua_lu_gp", 1510 .ca_mode = S_IRUGO | S_IWUSR }, 1511 .show = target_core_show_alua_lu_gp, 1512 .store = target_core_store_alua_lu_gp, 1513}; 1514 1515static ssize_t target_core_show_dev_lba_map(void *p, char *page) 1516{ 1517 struct se_device *dev = p; 1518 struct t10_alua_lba_map *map; 1519 struct t10_alua_lba_map_member *mem; 1520 char *b = page; 1521 int bl = 0; 1522 char state; 1523 1524 spin_lock(&dev->t10_alua.lba_map_lock); 1525 if (!list_empty(&dev->t10_alua.lba_map_list)) 1526 bl += sprintf(b + bl, "%u %u\n", 1527 dev->t10_alua.lba_map_segment_size, 1528 dev->t10_alua.lba_map_segment_multiplier); 1529 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) { 1530 bl += sprintf(b + bl, "%llu %llu", 1531 map->lba_map_first_lba, map->lba_map_last_lba); 1532 list_for_each_entry(mem, &map->lba_map_mem_list, 1533 lba_map_mem_list) { 1534 switch (mem->lba_map_mem_alua_state) { 1535 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED: 1536 state = 'O'; 1537 break; 1538 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED: 1539 state = 'A'; 1540 break; 1541 case ALUA_ACCESS_STATE_STANDBY: 1542 state = 'S'; 1543 break; 1544 case ALUA_ACCESS_STATE_UNAVAILABLE: 1545 state = 'U'; 1546 break; 1547 default: 1548 state = '.'; 1549 break; 1550 } 1551 bl += sprintf(b + bl, " %d:%c", 1552 mem->lba_map_mem_alua_pg_id, state); 1553 } 1554 bl += sprintf(b + bl, "\n"); 1555 } 1556 spin_unlock(&dev->t10_alua.lba_map_lock); 1557 return bl; 1558} 1559 1560static ssize_t target_core_store_dev_lba_map( 1561 void *p, 1562 const char *page, 1563 size_t count) 1564{ 1565 struct se_device *dev = p; 1566 struct t10_alua_lba_map *lba_map = NULL; 1567 struct list_head lba_list; 1568 char *map_entries, *ptr; 1569 char state; 1570 int pg_num = -1, pg; 1571 int ret = 0, num = 0, pg_id, alua_state; 1572 unsigned long start_lba = -1, end_lba = -1; 1573 unsigned long segment_size = -1, segment_mult = -1; 1574 1575 map_entries = kstrdup(page, GFP_KERNEL); 1576 if (!map_entries) 1577 return -ENOMEM; 1578 1579 INIT_LIST_HEAD(&lba_list); 1580 while ((ptr = strsep(&map_entries, "\n")) != NULL) { 1581 if (!*ptr) 1582 continue; 1583 1584 if (num == 0) { 1585 if (sscanf(ptr, "%lu %lu\n", 1586 &segment_size, &segment_mult) != 2) { 1587 pr_err("Invalid line %d\n", num); 1588 ret = -EINVAL; 1589 break; 1590 } 1591 num++; 1592 continue; 1593 } 1594 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) { 1595 pr_err("Invalid line %d\n", num); 1596 ret = -EINVAL; 1597 break; 1598 } 1599 ptr = strchr(ptr, ' '); 1600 if (!ptr) { 1601 pr_err("Invalid line %d, missing end lba\n", num); 1602 ret = -EINVAL; 1603 break; 1604 } 1605 ptr++; 1606 ptr = strchr(ptr, ' '); 1607 if (!ptr) { 1608 pr_err("Invalid line %d, missing state definitions\n", 1609 num); 1610 ret = -EINVAL; 1611 break; 1612 } 1613 ptr++; 1614 lba_map = core_alua_allocate_lba_map(&lba_list, 1615 start_lba, end_lba); 1616 if (IS_ERR(lba_map)) { 1617 ret = PTR_ERR(lba_map); 1618 break; 1619 } 1620 pg = 0; 1621 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) { 1622 switch (state) { 1623 case 'O': 1624 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED; 1625 break; 1626 case 'A': 1627 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED; 1628 break; 1629 case 'S': 1630 alua_state = ALUA_ACCESS_STATE_STANDBY; 1631 break; 1632 case 'U': 1633 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE; 1634 break; 1635 default: 1636 pr_err("Invalid ALUA state '%c'\n", state); 1637 ret = -EINVAL; 1638 goto out; 1639 } 1640 1641 ret = core_alua_allocate_lba_map_mem(lba_map, 1642 pg_id, alua_state); 1643 if (ret) { 1644 pr_err("Invalid target descriptor %d:%c " 1645 "at line %d\n", 1646 pg_id, state, num); 1647 break; 1648 } 1649 pg++; 1650 ptr = strchr(ptr, ' '); 1651 if (ptr) 1652 ptr++; 1653 else 1654 break; 1655 } 1656 if (pg_num == -1) 1657 pg_num = pg; 1658 else if (pg != pg_num) { 1659 pr_err("Only %d from %d port groups definitions " 1660 "at line %d\n", pg, pg_num, num); 1661 ret = -EINVAL; 1662 break; 1663 } 1664 num++; 1665 } 1666out: 1667 if (ret) { 1668 core_alua_free_lba_map(&lba_list); 1669 count = ret; 1670 } else 1671 core_alua_set_lba_map(dev, &lba_list, 1672 segment_size, segment_mult); 1673 kfree(map_entries); 1674 return count; 1675} 1676 1677static struct target_core_configfs_attribute target_core_attr_dev_lba_map = { 1678 .attr = { .ca_owner = THIS_MODULE, 1679 .ca_name = "lba_map", 1680 .ca_mode = S_IRUGO | S_IWUSR }, 1681 .show = target_core_show_dev_lba_map, 1682 .store = target_core_store_dev_lba_map, 1683}; 1684 1685static struct configfs_attribute *target_core_dev_attrs[] = { 1686 &target_core_attr_dev_info.attr, 1687 &target_core_attr_dev_control.attr, 1688 &target_core_attr_dev_alias.attr, 1689 &target_core_attr_dev_udev_path.attr, 1690 &target_core_attr_dev_enable.attr, 1691 &target_core_attr_dev_alua_lu_gp.attr, 1692 &target_core_attr_dev_lba_map.attr, 1693 NULL, 1694}; 1695 1696static void target_core_dev_release(struct config_item *item) 1697{ 1698 struct config_group *dev_cg = to_config_group(item); 1699 struct se_device *dev = 1700 container_of(dev_cg, struct se_device, dev_group); 1701 1702 kfree(dev_cg->default_groups); 1703 target_free_device(dev); 1704} 1705 1706static ssize_t target_core_dev_show(struct config_item *item, 1707 struct configfs_attribute *attr, 1708 char *page) 1709{ 1710 struct config_group *dev_cg = to_config_group(item); 1711 struct se_device *dev = 1712 container_of(dev_cg, struct se_device, dev_group); 1713 struct target_core_configfs_attribute *tc_attr = container_of( 1714 attr, struct target_core_configfs_attribute, attr); 1715 1716 if (!tc_attr->show) 1717 return -EINVAL; 1718 1719 return tc_attr->show(dev, page); 1720} 1721 1722static ssize_t target_core_dev_store(struct config_item *item, 1723 struct configfs_attribute *attr, 1724 const char *page, size_t count) 1725{ 1726 struct config_group *dev_cg = to_config_group(item); 1727 struct se_device *dev = 1728 container_of(dev_cg, struct se_device, dev_group); 1729 struct target_core_configfs_attribute *tc_attr = container_of( 1730 attr, struct target_core_configfs_attribute, attr); 1731 1732 if (!tc_attr->store) 1733 return -EINVAL; 1734 1735 return tc_attr->store(dev, page, count); 1736} 1737 1738static struct configfs_item_operations target_core_dev_item_ops = { 1739 .release = target_core_dev_release, 1740 .show_attribute = target_core_dev_show, 1741 .store_attribute = target_core_dev_store, 1742}; 1743 1744TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs); 1745 1746/* End functions for struct config_item_type tb_dev_cit */ 1747 1748/* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ 1749 1750CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp); 1751#define SE_DEV_ALUA_LU_ATTR(_name, _mode) \ 1752static struct target_core_alua_lu_gp_attribute \ 1753 target_core_alua_lu_gp_##_name = \ 1754 __CONFIGFS_EATTR(_name, _mode, \ 1755 target_core_alua_lu_gp_show_attr_##_name, \ 1756 target_core_alua_lu_gp_store_attr_##_name); 1757 1758#define SE_DEV_ALUA_LU_ATTR_RO(_name) \ 1759static struct target_core_alua_lu_gp_attribute \ 1760 target_core_alua_lu_gp_##_name = \ 1761 __CONFIGFS_EATTR_RO(_name, \ 1762 target_core_alua_lu_gp_show_attr_##_name); 1763 1764/* 1765 * lu_gp_id 1766 */ 1767static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id( 1768 struct t10_alua_lu_gp *lu_gp, 1769 char *page) 1770{ 1771 if (!lu_gp->lu_gp_valid_id) 1772 return 0; 1773 1774 return sprintf(page, "%hu\n", lu_gp->lu_gp_id); 1775} 1776 1777static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id( 1778 struct t10_alua_lu_gp *lu_gp, 1779 const char *page, 1780 size_t count) 1781{ 1782 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; 1783 unsigned long lu_gp_id; 1784 int ret; 1785 1786 ret = kstrtoul(page, 0, &lu_gp_id); 1787 if (ret < 0) { 1788 pr_err("kstrtoul() returned %d for" 1789 " lu_gp_id\n", ret); 1790 return ret; 1791 } 1792 if (lu_gp_id > 0x0000ffff) { 1793 pr_err("ALUA lu_gp_id: %lu exceeds maximum:" 1794 " 0x0000ffff\n", lu_gp_id); 1795 return -EINVAL; 1796 } 1797 1798 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id); 1799 if (ret < 0) 1800 return -EINVAL; 1801 1802 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit" 1803 " Group: core/alua/lu_gps/%s to ID: %hu\n", 1804 config_item_name(&alua_lu_gp_cg->cg_item), 1805 lu_gp->lu_gp_id); 1806 1807 return count; 1808} 1809 1810SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR); 1811 1812/* 1813 * members 1814 */ 1815static ssize_t target_core_alua_lu_gp_show_attr_members( 1816 struct t10_alua_lu_gp *lu_gp, 1817 char *page) 1818{ 1819 struct se_device *dev; 1820 struct se_hba *hba; 1821 struct t10_alua_lu_gp_member *lu_gp_mem; 1822 ssize_t len = 0, cur_len; 1823 unsigned char buf[LU_GROUP_NAME_BUF]; 1824 1825 memset(buf, 0, LU_GROUP_NAME_BUF); 1826 1827 spin_lock(&lu_gp->lu_gp_lock); 1828 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { 1829 dev = lu_gp_mem->lu_gp_mem_dev; 1830 hba = dev->se_hba; 1831 1832 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", 1833 config_item_name(&hba->hba_group.cg_item), 1834 config_item_name(&dev->dev_group.cg_item)); 1835 cur_len++; /* Extra byte for NULL terminator */ 1836 1837 if ((cur_len + len) > PAGE_SIZE) { 1838 pr_warn("Ran out of lu_gp_show_attr" 1839 "_members buffer\n"); 1840 break; 1841 } 1842 memcpy(page+len, buf, cur_len); 1843 len += cur_len; 1844 } 1845 spin_unlock(&lu_gp->lu_gp_lock); 1846 1847 return len; 1848} 1849 1850SE_DEV_ALUA_LU_ATTR_RO(members); 1851 1852CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group); 1853 1854static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { 1855 &target_core_alua_lu_gp_lu_gp_id.attr, 1856 &target_core_alua_lu_gp_members.attr, 1857 NULL, 1858}; 1859 1860static void target_core_alua_lu_gp_release(struct config_item *item) 1861{ 1862 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 1863 struct t10_alua_lu_gp, lu_gp_group); 1864 1865 core_alua_free_lu_gp(lu_gp); 1866} 1867 1868static struct configfs_item_operations target_core_alua_lu_gp_ops = { 1869 .release = target_core_alua_lu_gp_release, 1870 .show_attribute = target_core_alua_lu_gp_attr_show, 1871 .store_attribute = target_core_alua_lu_gp_attr_store, 1872}; 1873 1874static struct config_item_type target_core_alua_lu_gp_cit = { 1875 .ct_item_ops = &target_core_alua_lu_gp_ops, 1876 .ct_attrs = target_core_alua_lu_gp_attrs, 1877 .ct_owner = THIS_MODULE, 1878}; 1879 1880/* End functions for struct config_item_type target_core_alua_lu_gp_cit */ 1881 1882/* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ 1883 1884static struct config_group *target_core_alua_create_lu_gp( 1885 struct config_group *group, 1886 const char *name) 1887{ 1888 struct t10_alua_lu_gp *lu_gp; 1889 struct config_group *alua_lu_gp_cg = NULL; 1890 struct config_item *alua_lu_gp_ci = NULL; 1891 1892 lu_gp = core_alua_allocate_lu_gp(name, 0); 1893 if (IS_ERR(lu_gp)) 1894 return NULL; 1895 1896 alua_lu_gp_cg = &lu_gp->lu_gp_group; 1897 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; 1898 1899 config_group_init_type_name(alua_lu_gp_cg, name, 1900 &target_core_alua_lu_gp_cit); 1901 1902 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit" 1903 " Group: core/alua/lu_gps/%s\n", 1904 config_item_name(alua_lu_gp_ci)); 1905 1906 return alua_lu_gp_cg; 1907 1908} 1909 1910static void target_core_alua_drop_lu_gp( 1911 struct config_group *group, 1912 struct config_item *item) 1913{ 1914 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), 1915 struct t10_alua_lu_gp, lu_gp_group); 1916 1917 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit" 1918 " Group: core/alua/lu_gps/%s, ID: %hu\n", 1919 config_item_name(item), lu_gp->lu_gp_id); 1920 /* 1921 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() 1922 * -> target_core_alua_lu_gp_release() 1923 */ 1924 config_item_put(item); 1925} 1926 1927static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { 1928 .make_group = &target_core_alua_create_lu_gp, 1929 .drop_item = &target_core_alua_drop_lu_gp, 1930}; 1931 1932static struct config_item_type target_core_alua_lu_gps_cit = { 1933 .ct_item_ops = NULL, 1934 .ct_group_ops = &target_core_alua_lu_gps_group_ops, 1935 .ct_owner = THIS_MODULE, 1936}; 1937 1938/* End functions for struct config_item_type target_core_alua_lu_gps_cit */ 1939 1940/* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 1941 1942CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp); 1943#define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \ 1944static struct target_core_alua_tg_pt_gp_attribute \ 1945 target_core_alua_tg_pt_gp_##_name = \ 1946 __CONFIGFS_EATTR(_name, _mode, \ 1947 target_core_alua_tg_pt_gp_show_attr_##_name, \ 1948 target_core_alua_tg_pt_gp_store_attr_##_name); 1949 1950#define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \ 1951static struct target_core_alua_tg_pt_gp_attribute \ 1952 target_core_alua_tg_pt_gp_##_name = \ 1953 __CONFIGFS_EATTR_RO(_name, \ 1954 target_core_alua_tg_pt_gp_show_attr_##_name); 1955 1956/* 1957 * alua_access_state 1958 */ 1959static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state( 1960 struct t10_alua_tg_pt_gp *tg_pt_gp, 1961 char *page) 1962{ 1963 return sprintf(page, "%d\n", 1964 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state)); 1965} 1966 1967static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state( 1968 struct t10_alua_tg_pt_gp *tg_pt_gp, 1969 const char *page, 1970 size_t count) 1971{ 1972 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev; 1973 unsigned long tmp; 1974 int new_state, ret; 1975 1976 if (!tg_pt_gp->tg_pt_gp_valid_id) { 1977 pr_err("Unable to do implicit ALUA on non valid" 1978 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id); 1979 return -EINVAL; 1980 } 1981 if (!(dev->dev_flags & DF_CONFIGURED)) { 1982 pr_err("Unable to set alua_access_state while device is" 1983 " not configured\n"); 1984 return -ENODEV; 1985 } 1986 1987 ret = kstrtoul(page, 0, &tmp); 1988 if (ret < 0) { 1989 pr_err("Unable to extract new ALUA access state from" 1990 " %s\n", page); 1991 return ret; 1992 } 1993 new_state = (int)tmp; 1994 1995 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) { 1996 pr_err("Unable to process implicit configfs ALUA" 1997 " transition while TPGS_IMPLICIT_ALUA is disabled\n"); 1998 return -EINVAL; 1999 } 2000 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA && 2001 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) { 2002 /* LBA DEPENDENT is only allowed with implicit ALUA */ 2003 pr_err("Unable to process implicit configfs ALUA transition" 2004 " while explicit ALUA management is enabled\n"); 2005 return -EINVAL; 2006 } 2007 2008 ret = core_alua_do_port_transition(tg_pt_gp, dev, 2009 NULL, NULL, new_state, 0); 2010 return (!ret) ? count : -EINVAL; 2011} 2012 2013SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR); 2014 2015/* 2016 * alua_access_status 2017 */ 2018static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status( 2019 struct t10_alua_tg_pt_gp *tg_pt_gp, 2020 char *page) 2021{ 2022 return sprintf(page, "%s\n", 2023 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); 2024} 2025 2026static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status( 2027 struct t10_alua_tg_pt_gp *tg_pt_gp, 2028 const char *page, 2029 size_t count) 2030{ 2031 unsigned long tmp; 2032 int new_status, ret; 2033 2034 if (!tg_pt_gp->tg_pt_gp_valid_id) { 2035 pr_err("Unable to do set ALUA access status on non" 2036 " valid tg_pt_gp ID: %hu\n", 2037 tg_pt_gp->tg_pt_gp_valid_id); 2038 return -EINVAL; 2039 } 2040 2041 ret = kstrtoul(page, 0, &tmp); 2042 if (ret < 0) { 2043 pr_err("Unable to extract new ALUA access status" 2044 " from %s\n", page); 2045 return ret; 2046 } 2047 new_status = (int)tmp; 2048 2049 if ((new_status != ALUA_STATUS_NONE) && 2050 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) && 2051 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) { 2052 pr_err("Illegal ALUA access status: 0x%02x\n", 2053 new_status); 2054 return -EINVAL; 2055 } 2056 2057 tg_pt_gp->tg_pt_gp_alua_access_status = new_status; 2058 return count; 2059} 2060 2061SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR); 2062 2063/* 2064 * alua_access_type 2065 */ 2066static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type( 2067 struct t10_alua_tg_pt_gp *tg_pt_gp, 2068 char *page) 2069{ 2070 return core_alua_show_access_type(tg_pt_gp, page); 2071} 2072 2073static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type( 2074 struct t10_alua_tg_pt_gp *tg_pt_gp, 2075 const char *page, 2076 size_t count) 2077{ 2078 return core_alua_store_access_type(tg_pt_gp, page, count); 2079} 2080 2081SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR); 2082 2083/* 2084 * alua_supported_states 2085 */ 2086 2087#define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit) \ 2088static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \ 2089 struct t10_alua_tg_pt_gp *t, char *p) \ 2090{ \ 2091 return sprintf(p, "%d\n", !!(t->_var & _bit)); \ 2092} 2093 2094#define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit) \ 2095static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\ 2096 struct t10_alua_tg_pt_gp *t, const char *p, size_t c) \ 2097{ \ 2098 unsigned long tmp; \ 2099 int ret; \ 2100 \ 2101 if (!t->tg_pt_gp_valid_id) { \ 2102 pr_err("Unable to do set ##_name ALUA state on non" \ 2103 " valid tg_pt_gp ID: %hu\n", \ 2104 t->tg_pt_gp_valid_id); \ 2105 return -EINVAL; \ 2106 } \ 2107 \ 2108 ret = kstrtoul(p, 0, &tmp); \ 2109 if (ret < 0) { \ 2110 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \ 2111 return -EINVAL; \ 2112 } \ 2113 if (tmp > 1) { \ 2114 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \ 2115 return -EINVAL; \ 2116 } \ 2117 if (tmp) \ 2118 t->_var |= _bit; \ 2119 else \ 2120 t->_var &= ~_bit; \ 2121 \ 2122 return c; \ 2123} 2124 2125SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning, 2126 tg_pt_gp_alua_supported_states, ALUA_T_SUP); 2127SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning, 2128 tg_pt_gp_alua_supported_states, ALUA_T_SUP); 2129SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR); 2130 2131SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline, 2132 tg_pt_gp_alua_supported_states, ALUA_O_SUP); 2133SE_DEV_ALUA_SUPPORT_STATE_STORE(offline, 2134 tg_pt_gp_alua_supported_states, ALUA_O_SUP); 2135SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR); 2136 2137SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent, 2138 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP); 2139SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent, 2140 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP); 2141SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO); 2142 2143SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable, 2144 tg_pt_gp_alua_supported_states, ALUA_U_SUP); 2145SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable, 2146 tg_pt_gp_alua_supported_states, ALUA_U_SUP); 2147SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR); 2148 2149SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby, 2150 tg_pt_gp_alua_supported_states, ALUA_S_SUP); 2151SE_DEV_ALUA_SUPPORT_STATE_STORE(standby, 2152 tg_pt_gp_alua_supported_states, ALUA_S_SUP); 2153SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR); 2154 2155SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized, 2156 tg_pt_gp_alua_supported_states, ALUA_AO_SUP); 2157SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized, 2158 tg_pt_gp_alua_supported_states, ALUA_AO_SUP); 2159SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR); 2160 2161SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized, 2162 tg_pt_gp_alua_supported_states, ALUA_AN_SUP); 2163SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized, 2164 tg_pt_gp_alua_supported_states, ALUA_AN_SUP); 2165SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR); 2166 2167/* 2168 * alua_write_metadata 2169 */ 2170static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata( 2171 struct t10_alua_tg_pt_gp *tg_pt_gp, 2172 char *page) 2173{ 2174 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata); 2175} 2176 2177static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata( 2178 struct t10_alua_tg_pt_gp *tg_pt_gp, 2179 const char *page, 2180 size_t count) 2181{ 2182 unsigned long tmp; 2183 int ret; 2184 2185 ret = kstrtoul(page, 0, &tmp); 2186 if (ret < 0) { 2187 pr_err("Unable to extract alua_write_metadata\n"); 2188 return ret; 2189 } 2190 2191 if ((tmp != 0) && (tmp != 1)) { 2192 pr_err("Illegal value for alua_write_metadata:" 2193 " %lu\n", tmp); 2194 return -EINVAL; 2195 } 2196 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp; 2197 2198 return count; 2199} 2200 2201SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR); 2202 2203 2204 2205/* 2206 * nonop_delay_msecs 2207 */ 2208static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs( 2209 struct t10_alua_tg_pt_gp *tg_pt_gp, 2210 char *page) 2211{ 2212 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page); 2213 2214} 2215 2216static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs( 2217 struct t10_alua_tg_pt_gp *tg_pt_gp, 2218 const char *page, 2219 size_t count) 2220{ 2221 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count); 2222} 2223 2224SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR); 2225 2226/* 2227 * trans_delay_msecs 2228 */ 2229static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs( 2230 struct t10_alua_tg_pt_gp *tg_pt_gp, 2231 char *page) 2232{ 2233 return core_alua_show_trans_delay_msecs(tg_pt_gp, page); 2234} 2235 2236static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs( 2237 struct t10_alua_tg_pt_gp *tg_pt_gp, 2238 const char *page, 2239 size_t count) 2240{ 2241 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count); 2242} 2243 2244SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR); 2245 2246/* 2247 * implicit_trans_secs 2248 */ 2249static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs( 2250 struct t10_alua_tg_pt_gp *tg_pt_gp, 2251 char *page) 2252{ 2253 return core_alua_show_implicit_trans_secs(tg_pt_gp, page); 2254} 2255 2256static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs( 2257 struct t10_alua_tg_pt_gp *tg_pt_gp, 2258 const char *page, 2259 size_t count) 2260{ 2261 return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count); 2262} 2263 2264SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR); 2265 2266/* 2267 * preferred 2268 */ 2269 2270static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred( 2271 struct t10_alua_tg_pt_gp *tg_pt_gp, 2272 char *page) 2273{ 2274 return core_alua_show_preferred_bit(tg_pt_gp, page); 2275} 2276 2277static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred( 2278 struct t10_alua_tg_pt_gp *tg_pt_gp, 2279 const char *page, 2280 size_t count) 2281{ 2282 return core_alua_store_preferred_bit(tg_pt_gp, page, count); 2283} 2284 2285SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR); 2286 2287/* 2288 * tg_pt_gp_id 2289 */ 2290static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id( 2291 struct t10_alua_tg_pt_gp *tg_pt_gp, 2292 char *page) 2293{ 2294 if (!tg_pt_gp->tg_pt_gp_valid_id) 2295 return 0; 2296 2297 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); 2298} 2299 2300static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id( 2301 struct t10_alua_tg_pt_gp *tg_pt_gp, 2302 const char *page, 2303 size_t count) 2304{ 2305 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2306 unsigned long tg_pt_gp_id; 2307 int ret; 2308 2309 ret = kstrtoul(page, 0, &tg_pt_gp_id); 2310 if (ret < 0) { 2311 pr_err("kstrtoul() returned %d for" 2312 " tg_pt_gp_id\n", ret); 2313 return ret; 2314 } 2315 if (tg_pt_gp_id > 0x0000ffff) { 2316 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:" 2317 " 0x0000ffff\n", tg_pt_gp_id); 2318 return -EINVAL; 2319 } 2320 2321 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id); 2322 if (ret < 0) 2323 return -EINVAL; 2324 2325 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: " 2326 "core/alua/tg_pt_gps/%s to ID: %hu\n", 2327 config_item_name(&alua_tg_pt_gp_cg->cg_item), 2328 tg_pt_gp->tg_pt_gp_id); 2329 2330 return count; 2331} 2332 2333SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR); 2334 2335/* 2336 * members 2337 */ 2338static ssize_t target_core_alua_tg_pt_gp_show_attr_members( 2339 struct t10_alua_tg_pt_gp *tg_pt_gp, 2340 char *page) 2341{ 2342 struct se_port *port; 2343 struct se_portal_group *tpg; 2344 struct se_lun *lun; 2345 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; 2346 ssize_t len = 0, cur_len; 2347 unsigned char buf[TG_PT_GROUP_NAME_BUF]; 2348 2349 memset(buf, 0, TG_PT_GROUP_NAME_BUF); 2350 2351 spin_lock(&tg_pt_gp->tg_pt_gp_lock); 2352 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list, 2353 tg_pt_gp_mem_list) { 2354 port = tg_pt_gp_mem->tg_pt; 2355 tpg = port->sep_tpg; 2356 lun = port->sep_lun; 2357 2358 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" 2359 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(), 2360 tpg->se_tpg_tfo->tpg_get_wwn(tpg), 2361 tpg->se_tpg_tfo->tpg_get_tag(tpg), 2362 config_item_name(&lun->lun_group.cg_item)); 2363 cur_len++; /* Extra byte for NULL terminator */ 2364 2365 if ((cur_len + len) > PAGE_SIZE) { 2366 pr_warn("Ran out of lu_gp_show_attr" 2367 "_members buffer\n"); 2368 break; 2369 } 2370 memcpy(page+len, buf, cur_len); 2371 len += cur_len; 2372 } 2373 spin_unlock(&tg_pt_gp->tg_pt_gp_lock); 2374 2375 return len; 2376} 2377 2378SE_DEV_ALUA_TG_PT_ATTR_RO(members); 2379 2380CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp, 2381 tg_pt_gp_group); 2382 2383static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { 2384 &target_core_alua_tg_pt_gp_alua_access_state.attr, 2385 &target_core_alua_tg_pt_gp_alua_access_status.attr, 2386 &target_core_alua_tg_pt_gp_alua_access_type.attr, 2387 &target_core_alua_tg_pt_gp_alua_support_transitioning.attr, 2388 &target_core_alua_tg_pt_gp_alua_support_offline.attr, 2389 &target_core_alua_tg_pt_gp_alua_support_lba_dependent.attr, 2390 &target_core_alua_tg_pt_gp_alua_support_unavailable.attr, 2391 &target_core_alua_tg_pt_gp_alua_support_standby.attr, 2392 &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized.attr, 2393 &target_core_alua_tg_pt_gp_alua_support_active_optimized.attr, 2394 &target_core_alua_tg_pt_gp_alua_write_metadata.attr, 2395 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr, 2396 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr, 2397 &target_core_alua_tg_pt_gp_implicit_trans_secs.attr, 2398 &target_core_alua_tg_pt_gp_preferred.attr, 2399 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr, 2400 &target_core_alua_tg_pt_gp_members.attr, 2401 NULL, 2402}; 2403 2404static void target_core_alua_tg_pt_gp_release(struct config_item *item) 2405{ 2406 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2407 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2408 2409 core_alua_free_tg_pt_gp(tg_pt_gp); 2410} 2411 2412static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { 2413 .release = target_core_alua_tg_pt_gp_release, 2414 .show_attribute = target_core_alua_tg_pt_gp_attr_show, 2415 .store_attribute = target_core_alua_tg_pt_gp_attr_store, 2416}; 2417 2418static struct config_item_type target_core_alua_tg_pt_gp_cit = { 2419 .ct_item_ops = &target_core_alua_tg_pt_gp_ops, 2420 .ct_attrs = target_core_alua_tg_pt_gp_attrs, 2421 .ct_owner = THIS_MODULE, 2422}; 2423 2424/* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ 2425 2426/* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 2427 2428static struct config_group *target_core_alua_create_tg_pt_gp( 2429 struct config_group *group, 2430 const char *name) 2431{ 2432 struct t10_alua *alua = container_of(group, struct t10_alua, 2433 alua_tg_pt_gps_group); 2434 struct t10_alua_tg_pt_gp *tg_pt_gp; 2435 struct config_group *alua_tg_pt_gp_cg = NULL; 2436 struct config_item *alua_tg_pt_gp_ci = NULL; 2437 2438 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0); 2439 if (!tg_pt_gp) 2440 return NULL; 2441 2442 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; 2443 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; 2444 2445 config_group_init_type_name(alua_tg_pt_gp_cg, name, 2446 &target_core_alua_tg_pt_gp_cit); 2447 2448 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port" 2449 " Group: alua/tg_pt_gps/%s\n", 2450 config_item_name(alua_tg_pt_gp_ci)); 2451 2452 return alua_tg_pt_gp_cg; 2453} 2454 2455static void target_core_alua_drop_tg_pt_gp( 2456 struct config_group *group, 2457 struct config_item *item) 2458{ 2459 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), 2460 struct t10_alua_tg_pt_gp, tg_pt_gp_group); 2461 2462 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port" 2463 " Group: alua/tg_pt_gps/%s, ID: %hu\n", 2464 config_item_name(item), tg_pt_gp->tg_pt_gp_id); 2465 /* 2466 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() 2467 * -> target_core_alua_tg_pt_gp_release(). 2468 */ 2469 config_item_put(item); 2470} 2471 2472static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { 2473 .make_group = &target_core_alua_create_tg_pt_gp, 2474 .drop_item = &target_core_alua_drop_tg_pt_gp, 2475}; 2476 2477TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL); 2478 2479/* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */ 2480 2481/* Start functions for struct config_item_type target_core_alua_cit */ 2482 2483/* 2484 * target_core_alua_cit is a ConfigFS group that lives under 2485 * /sys/kernel/config/target/core/alua. There are default groups 2486 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to 2487 * target_core_alua_cit in target_core_init_configfs() below. 2488 */ 2489static struct config_item_type target_core_alua_cit = { 2490 .ct_item_ops = NULL, 2491 .ct_attrs = NULL, 2492 .ct_owner = THIS_MODULE, 2493}; 2494 2495/* End functions for struct config_item_type target_core_alua_cit */ 2496 2497/* Start functions for struct config_item_type tb_dev_stat_cit */ 2498 2499static struct config_group *target_core_stat_mkdir( 2500 struct config_group *group, 2501 const char *name) 2502{ 2503 return ERR_PTR(-ENOSYS); 2504} 2505 2506static void target_core_stat_rmdir( 2507 struct config_group *group, 2508 struct config_item *item) 2509{ 2510 return; 2511} 2512 2513static struct configfs_group_operations target_core_stat_group_ops = { 2514 .make_group = &target_core_stat_mkdir, 2515 .drop_item = &target_core_stat_rmdir, 2516}; 2517 2518TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL); 2519 2520/* End functions for struct config_item_type tb_dev_stat_cit */ 2521 2522/* Start functions for struct config_item_type target_core_hba_cit */ 2523 2524static struct config_group *target_core_make_subdev( 2525 struct config_group *group, 2526 const char *name) 2527{ 2528 struct t10_alua_tg_pt_gp *tg_pt_gp; 2529 struct se_subsystem_api *t; 2530 struct config_item *hba_ci = &group->cg_item; 2531 struct se_hba *hba = item_to_hba(hba_ci); 2532 struct se_device *dev; 2533 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL; 2534 struct config_group *dev_stat_grp = NULL; 2535 int errno = -ENOMEM, ret; 2536 2537 ret = mutex_lock_interruptible(&hba->hba_access_mutex); 2538 if (ret) 2539 return ERR_PTR(ret); 2540 /* 2541 * Locate the struct se_subsystem_api from parent's struct se_hba. 2542 */ 2543 t = hba->transport; 2544 2545 dev = target_alloc_device(hba, name); 2546 if (!dev) 2547 goto out_unlock; 2548 2549 dev_cg = &dev->dev_group; 2550 2551 dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6, 2552 GFP_KERNEL); 2553 if (!dev_cg->default_groups) 2554 goto out_free_device; 2555 2556 config_group_init_type_name(dev_cg, name, &t->tb_cits.tb_dev_cit); 2557 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib", 2558 &t->tb_cits.tb_dev_attrib_cit); 2559 config_group_init_type_name(&dev->dev_pr_group, "pr", 2560 &t->tb_cits.tb_dev_pr_cit); 2561 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn", 2562 &t->tb_cits.tb_dev_wwn_cit); 2563 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group, 2564 "alua", &t->tb_cits.tb_dev_alua_tg_pt_gps_cit); 2565 config_group_init_type_name(&dev->dev_stat_grps.stat_group, 2566 "statistics", &t->tb_cits.tb_dev_stat_cit); 2567 2568 dev_cg->default_groups[0] = &dev->dev_attrib.da_group; 2569 dev_cg->default_groups[1] = &dev->dev_pr_group; 2570 dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group; 2571 dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group; 2572 dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group; 2573 dev_cg->default_groups[5] = NULL; 2574 /* 2575 * Add core/$HBA/$DEV/alua/default_tg_pt_gp 2576 */ 2577 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1); 2578 if (!tg_pt_gp) 2579 goto out_free_dev_cg_default_groups; 2580 dev->t10_alua.default_tg_pt_gp = tg_pt_gp; 2581 2582 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group; 2583 tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 2584 GFP_KERNEL); 2585 if (!tg_pt_gp_cg->default_groups) { 2586 pr_err("Unable to allocate tg_pt_gp_cg->" 2587 "default_groups\n"); 2588 goto out_free_tg_pt_gp; 2589 } 2590 2591 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, 2592 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); 2593 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group; 2594 tg_pt_gp_cg->default_groups[1] = NULL; 2595 /* 2596 * Add core/$HBA/$DEV/statistics/ default groups 2597 */ 2598 dev_stat_grp = &dev->dev_stat_grps.stat_group; 2599 dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4, 2600 GFP_KERNEL); 2601 if (!dev_stat_grp->default_groups) { 2602 pr_err("Unable to allocate dev_stat_grp->default_groups\n"); 2603 goto out_free_tg_pt_gp_cg_default_groups; 2604 } 2605 target_stat_setup_dev_default_groups(dev); 2606 2607 mutex_unlock(&hba->hba_access_mutex); 2608 return dev_cg; 2609 2610out_free_tg_pt_gp_cg_default_groups: 2611 kfree(tg_pt_gp_cg->default_groups); 2612out_free_tg_pt_gp: 2613 core_alua_free_tg_pt_gp(tg_pt_gp); 2614out_free_dev_cg_default_groups: 2615 kfree(dev_cg->default_groups); 2616out_free_device: 2617 target_free_device(dev); 2618out_unlock: 2619 mutex_unlock(&hba->hba_access_mutex); 2620 return ERR_PTR(errno); 2621} 2622 2623static void target_core_drop_subdev( 2624 struct config_group *group, 2625 struct config_item *item) 2626{ 2627 struct config_group *dev_cg = to_config_group(item); 2628 struct se_device *dev = 2629 container_of(dev_cg, struct se_device, dev_group); 2630 struct se_hba *hba; 2631 struct config_item *df_item; 2632 struct config_group *tg_pt_gp_cg, *dev_stat_grp; 2633 int i; 2634 2635 hba = item_to_hba(&dev->se_hba->hba_group.cg_item); 2636 2637 mutex_lock(&hba->hba_access_mutex); 2638 2639 dev_stat_grp = &dev->dev_stat_grps.stat_group; 2640 for (i = 0; dev_stat_grp->default_groups[i]; i++) { 2641 df_item = &dev_stat_grp->default_groups[i]->cg_item; 2642 dev_stat_grp->default_groups[i] = NULL; 2643 config_item_put(df_item); 2644 } 2645 kfree(dev_stat_grp->default_groups); 2646 2647 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group; 2648 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) { 2649 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item; 2650 tg_pt_gp_cg->default_groups[i] = NULL; 2651 config_item_put(df_item); 2652 } 2653 kfree(tg_pt_gp_cg->default_groups); 2654 /* 2655 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp 2656 * directly from target_core_alua_tg_pt_gp_release(). 2657 */ 2658 dev->t10_alua.default_tg_pt_gp = NULL; 2659 2660 for (i = 0; dev_cg->default_groups[i]; i++) { 2661 df_item = &dev_cg->default_groups[i]->cg_item; 2662 dev_cg->default_groups[i] = NULL; 2663 config_item_put(df_item); 2664 } 2665 /* 2666 * se_dev is released from target_core_dev_item_ops->release() 2667 */ 2668 config_item_put(item); 2669 mutex_unlock(&hba->hba_access_mutex); 2670} 2671 2672static struct configfs_group_operations target_core_hba_group_ops = { 2673 .make_group = target_core_make_subdev, 2674 .drop_item = target_core_drop_subdev, 2675}; 2676 2677CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba); 2678#define SE_HBA_ATTR(_name, _mode) \ 2679static struct target_core_hba_attribute \ 2680 target_core_hba_##_name = \ 2681 __CONFIGFS_EATTR(_name, _mode, \ 2682 target_core_hba_show_attr_##_name, \ 2683 target_core_hba_store_attr_##_name); 2684 2685#define SE_HBA_ATTR_RO(_name) \ 2686static struct target_core_hba_attribute \ 2687 target_core_hba_##_name = \ 2688 __CONFIGFS_EATTR_RO(_name, \ 2689 target_core_hba_show_attr_##_name); 2690 2691static ssize_t target_core_hba_show_attr_hba_info( 2692 struct se_hba *hba, 2693 char *page) 2694{ 2695 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", 2696 hba->hba_id, hba->transport->name, 2697 TARGET_CORE_CONFIGFS_VERSION); 2698} 2699 2700SE_HBA_ATTR_RO(hba_info); 2701 2702static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba, 2703 char *page) 2704{ 2705 int hba_mode = 0; 2706 2707 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) 2708 hba_mode = 1; 2709 2710 return sprintf(page, "%d\n", hba_mode); 2711} 2712 2713static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba, 2714 const char *page, size_t count) 2715{ 2716 struct se_subsystem_api *transport = hba->transport; 2717 unsigned long mode_flag; 2718 int ret; 2719 2720 if (transport->pmode_enable_hba == NULL) 2721 return -EINVAL; 2722 2723 ret = kstrtoul(page, 0, &mode_flag); 2724 if (ret < 0) { 2725 pr_err("Unable to extract hba mode flag: %d\n", ret); 2726 return ret; 2727 } 2728 2729 if (hba->dev_count) { 2730 pr_err("Unable to set hba_mode with active devices\n"); 2731 return -EINVAL; 2732 } 2733 2734 ret = transport->pmode_enable_hba(hba, mode_flag); 2735 if (ret < 0) 2736 return -EINVAL; 2737 if (ret > 0) 2738 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; 2739 else if (ret == 0) 2740 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; 2741 2742 return count; 2743} 2744 2745SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR); 2746 2747CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group); 2748 2749static void target_core_hba_release(struct config_item *item) 2750{ 2751 struct se_hba *hba = container_of(to_config_group(item), 2752 struct se_hba, hba_group); 2753 core_delete_hba(hba); 2754} 2755 2756static struct configfs_attribute *target_core_hba_attrs[] = { 2757 &target_core_hba_hba_info.attr, 2758 &target_core_hba_hba_mode.attr, 2759 NULL, 2760}; 2761 2762static struct configfs_item_operations target_core_hba_item_ops = { 2763 .release = target_core_hba_release, 2764 .show_attribute = target_core_hba_attr_show, 2765 .store_attribute = target_core_hba_attr_store, 2766}; 2767 2768static struct config_item_type target_core_hba_cit = { 2769 .ct_item_ops = &target_core_hba_item_ops, 2770 .ct_group_ops = &target_core_hba_group_ops, 2771 .ct_attrs = target_core_hba_attrs, 2772 .ct_owner = THIS_MODULE, 2773}; 2774 2775static struct config_group *target_core_call_addhbatotarget( 2776 struct config_group *group, 2777 const char *name) 2778{ 2779 char *se_plugin_str, *str, *str2; 2780 struct se_hba *hba; 2781 char buf[TARGET_CORE_NAME_MAX_LEN]; 2782 unsigned long plugin_dep_id = 0; 2783 int ret; 2784 2785 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN); 2786 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 2787 pr_err("Passed *name strlen(): %d exceeds" 2788 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name), 2789 TARGET_CORE_NAME_MAX_LEN); 2790 return ERR_PTR(-ENAMETOOLONG); 2791 } 2792 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name); 2793 2794 str = strstr(buf, "_"); 2795 if (!str) { 2796 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n"); 2797 return ERR_PTR(-EINVAL); 2798 } 2799 se_plugin_str = buf; 2800 /* 2801 * Special case for subsystem plugins that have "_" in their names. 2802 * Namely rd_direct and rd_mcp.. 2803 */ 2804 str2 = strstr(str+1, "_"); 2805 if (str2) { 2806 *str2 = '\0'; /* Terminate for *se_plugin_str */ 2807 str2++; /* Skip to start of plugin dependent ID */ 2808 str = str2; 2809 } else { 2810 *str = '\0'; /* Terminate for *se_plugin_str */ 2811 str++; /* Skip to start of plugin dependent ID */ 2812 } 2813 2814 ret = kstrtoul(str, 0, &plugin_dep_id); 2815 if (ret < 0) { 2816 pr_err("kstrtoul() returned %d for" 2817 " plugin_dep_id\n", ret); 2818 return ERR_PTR(ret); 2819 } 2820 /* 2821 * Load up TCM subsystem plugins if they have not already been loaded. 2822 */ 2823 transport_subsystem_check_init(); 2824 2825 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); 2826 if (IS_ERR(hba)) 2827 return ERR_CAST(hba); 2828 2829 config_group_init_type_name(&hba->hba_group, name, 2830 &target_core_hba_cit); 2831 2832 return &hba->hba_group; 2833} 2834 2835static void target_core_call_delhbafromtarget( 2836 struct config_group *group, 2837 struct config_item *item) 2838{ 2839 /* 2840 * core_delete_hba() is called from target_core_hba_item_ops->release() 2841 * -> target_core_hba_release() 2842 */ 2843 config_item_put(item); 2844} 2845 2846static struct configfs_group_operations target_core_group_ops = { 2847 .make_group = target_core_call_addhbatotarget, 2848 .drop_item = target_core_call_delhbafromtarget, 2849}; 2850 2851static struct config_item_type target_core_cit = { 2852 .ct_item_ops = NULL, 2853 .ct_group_ops = &target_core_group_ops, 2854 .ct_attrs = NULL, 2855 .ct_owner = THIS_MODULE, 2856}; 2857 2858/* Stop functions for struct config_item_type target_core_hba_cit */ 2859 2860void target_core_setup_sub_cits(struct se_subsystem_api *sa) 2861{ 2862 target_core_setup_dev_cit(sa); 2863 target_core_setup_dev_attrib_cit(sa); 2864 target_core_setup_dev_pr_cit(sa); 2865 target_core_setup_dev_wwn_cit(sa); 2866 target_core_setup_dev_alua_tg_pt_gps_cit(sa); 2867 target_core_setup_dev_stat_cit(sa); 2868} 2869EXPORT_SYMBOL(target_core_setup_sub_cits); 2870 2871static int __init target_core_init_configfs(void) 2872{ 2873 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL; 2874 struct config_group *lu_gp_cg = NULL; 2875 struct configfs_subsystem *subsys = &target_core_fabrics; 2876 struct t10_alua_lu_gp *lu_gp; 2877 int ret; 2878 2879 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage" 2880 " Engine: %s on %s/%s on "UTS_RELEASE"\n", 2881 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine); 2882 2883 config_group_init(&subsys->su_group); 2884 mutex_init(&subsys->su_mutex); 2885 2886 ret = init_se_kmem_caches(); 2887 if (ret < 0) 2888 return ret; 2889 /* 2890 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object 2891 * and ALUA Logical Unit Group and Target Port Group infrastructure. 2892 */ 2893 target_cg = &subsys->su_group; 2894 target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 2895 GFP_KERNEL); 2896 if (!target_cg->default_groups) { 2897 pr_err("Unable to allocate target_cg->default_groups\n"); 2898 ret = -ENOMEM; 2899 goto out_global; 2900 } 2901 2902 config_group_init_type_name(&target_core_hbagroup, 2903 "core", &target_core_cit); 2904 target_cg->default_groups[0] = &target_core_hbagroup; 2905 target_cg->default_groups[1] = NULL; 2906 /* 2907 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ 2908 */ 2909 hba_cg = &target_core_hbagroup; 2910 hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 2911 GFP_KERNEL); 2912 if (!hba_cg->default_groups) { 2913 pr_err("Unable to allocate hba_cg->default_groups\n"); 2914 ret = -ENOMEM; 2915 goto out_global; 2916 } 2917 config_group_init_type_name(&alua_group, 2918 "alua", &target_core_alua_cit); 2919 hba_cg->default_groups[0] = &alua_group; 2920 hba_cg->default_groups[1] = NULL; 2921 /* 2922 * Add ALUA Logical Unit Group and Target Port Group ConfigFS 2923 * groups under /sys/kernel/config/target/core/alua/ 2924 */ 2925 alua_cg = &alua_group; 2926 alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 2927 GFP_KERNEL); 2928 if (!alua_cg->default_groups) { 2929 pr_err("Unable to allocate alua_cg->default_groups\n"); 2930 ret = -ENOMEM; 2931 goto out_global; 2932 } 2933 2934 config_group_init_type_name(&alua_lu_gps_group, 2935 "lu_gps", &target_core_alua_lu_gps_cit); 2936 alua_cg->default_groups[0] = &alua_lu_gps_group; 2937 alua_cg->default_groups[1] = NULL; 2938 /* 2939 * Add core/alua/lu_gps/default_lu_gp 2940 */ 2941 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); 2942 if (IS_ERR(lu_gp)) { 2943 ret = -ENOMEM; 2944 goto out_global; 2945 } 2946 2947 lu_gp_cg = &alua_lu_gps_group; 2948 lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2, 2949 GFP_KERNEL); 2950 if (!lu_gp_cg->default_groups) { 2951 pr_err("Unable to allocate lu_gp_cg->default_groups\n"); 2952 ret = -ENOMEM; 2953 goto out_global; 2954 } 2955 2956 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", 2957 &target_core_alua_lu_gp_cit); 2958 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group; 2959 lu_gp_cg->default_groups[1] = NULL; 2960 default_lu_gp = lu_gp; 2961 /* 2962 * Register the target_core_mod subsystem with configfs. 2963 */ 2964 ret = configfs_register_subsystem(subsys); 2965 if (ret < 0) { 2966 pr_err("Error %d while registering subsystem %s\n", 2967 ret, subsys->su_group.cg_item.ci_namebuf); 2968 goto out_global; 2969 } 2970 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric" 2971 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s" 2972 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); 2973 /* 2974 * Register built-in RAMDISK subsystem logic for virtual LUN 0 2975 */ 2976 ret = rd_module_init(); 2977 if (ret < 0) 2978 goto out; 2979 2980 ret = core_dev_setup_virtual_lun0(); 2981 if (ret < 0) 2982 goto out; 2983 2984 ret = target_xcopy_setup_pt(); 2985 if (ret < 0) 2986 goto out; 2987 2988 return 0; 2989 2990out: 2991 configfs_unregister_subsystem(subsys); 2992 core_dev_release_virtual_lun0(); 2993 rd_module_exit(); 2994out_global: 2995 if (default_lu_gp) { 2996 core_alua_free_lu_gp(default_lu_gp); 2997 default_lu_gp = NULL; 2998 } 2999 if (lu_gp_cg) 3000 kfree(lu_gp_cg->default_groups); 3001 if (alua_cg) 3002 kfree(alua_cg->default_groups); 3003 if (hba_cg) 3004 kfree(hba_cg->default_groups); 3005 kfree(target_cg->default_groups); 3006 release_se_kmem_caches(); 3007 return ret; 3008} 3009 3010static void __exit target_core_exit_configfs(void) 3011{ 3012 struct config_group *hba_cg, *alua_cg, *lu_gp_cg; 3013 struct config_item *item; 3014 int i; 3015 3016 lu_gp_cg = &alua_lu_gps_group; 3017 for (i = 0; lu_gp_cg->default_groups[i]; i++) { 3018 item = &lu_gp_cg->default_groups[i]->cg_item; 3019 lu_gp_cg->default_groups[i] = NULL; 3020 config_item_put(item); 3021 } 3022 kfree(lu_gp_cg->default_groups); 3023 lu_gp_cg->default_groups = NULL; 3024 3025 alua_cg = &alua_group; 3026 for (i = 0; alua_cg->default_groups[i]; i++) { 3027 item = &alua_cg->default_groups[i]->cg_item; 3028 alua_cg->default_groups[i] = NULL; 3029 config_item_put(item); 3030 } 3031 kfree(alua_cg->default_groups); 3032 alua_cg->default_groups = NULL; 3033 3034 hba_cg = &target_core_hbagroup; 3035 for (i = 0; hba_cg->default_groups[i]; i++) { 3036 item = &hba_cg->default_groups[i]->cg_item; 3037 hba_cg->default_groups[i] = NULL; 3038 config_item_put(item); 3039 } 3040 kfree(hba_cg->default_groups); 3041 hba_cg->default_groups = NULL; 3042 /* 3043 * We expect subsys->su_group.default_groups to be released 3044 * by configfs subsystem provider logic.. 3045 */ 3046 configfs_unregister_subsystem(&target_core_fabrics); 3047 kfree(target_core_fabrics.su_group.default_groups); 3048 3049 core_alua_free_lu_gp(default_lu_gp); 3050 default_lu_gp = NULL; 3051 3052 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric" 3053 " Infrastructure\n"); 3054 3055 core_dev_release_virtual_lun0(); 3056 rd_module_exit(); 3057 target_xcopy_release_pt(); 3058 release_se_kmem_caches(); 3059} 3060 3061MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); 3062MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3063MODULE_LICENSE("GPL"); 3064 3065module_init(target_core_init_configfs); 3066module_exit(target_core_exit_configfs); 3067