drivers/target/target_core_configfs.c

   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)              \
  54 static 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
  66 extern struct t10_alua_lu_gp *default_lu_gp;
  67
  68 static LIST_HEAD(g_tf_list);
  69 static DEFINE_MUTEX(g_tf_lock);
  70
  71 struct 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
  77 static struct config_group target_core_hbagroup;
  78 static struct config_group alua_group;
  79 static struct config_group alua_lu_gps_group;
  80
  81 static inline struct se_hba *
  82 item_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  */
  90 static 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
  99 static struct configfs_item_operations target_core_fabric_item_ops = {
 100         .show_attribute = target_core_attr_show,
 101 };
 102
 103 static struct configfs_attribute target_core_item_attr_version = {
 104         .ca_owner       = THIS_MODULE,
 105         .ca_name        = "version",
 106         .ca_mode        = S_IRUGO,
 107 };
 108
 109 static 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  */
 133 static 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_err("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_err("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_err("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_err("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         /*
 216          * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
 217          */
 218         tf->tf_ops.tf_subsys = tf->tf_subsys;
 219         tf->tf_fabric = &tf->tf_group.cg_item;
 220         pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
 221                         " for %s\n", name);
 222
 223         return &tf->tf_group;
 224 }
 225
 226 /*
 227  * Called from struct target_core_group_ops->drop_item()
 228  */
 229 static void target_core_deregister_fabric(
 230         struct config_group *group,
 231         struct config_item *item)
 232 {
 233         struct target_fabric_configfs *tf = container_of(
 234                 to_config_group(item), struct target_fabric_configfs, tf_group);
 235         struct config_group *tf_group;
 236         struct config_item *df_item;
 237         int i;
 238
 239         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
 240                 " tf list\n", config_item_name(item));
 241
 242         pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
 243                         " %s\n", tf->tf_name);
 244         atomic_dec(&tf->tf_access_cnt);
 245
 246         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
 247                         " tf->tf_fabric for %s\n", tf->tf_name);
 248         tf->tf_fabric = NULL;
 249
 250         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
 251                         " %s\n", config_item_name(item));
 252
 253         tf_group = &tf->tf_group;
 254         for (i = 0; tf_group->default_groups[i]; i++) {
 255                 df_item = &tf_group->default_groups[i]->cg_item;
 256                 tf_group->default_groups[i] = NULL;
 257                 config_item_put(df_item);
 258         }
 259         config_item_put(item);
 260 }
 261
 262 static struct configfs_group_operations target_core_fabric_group_ops = {
 263         .make_group     = &target_core_register_fabric,
 264         .drop_item      = &target_core_deregister_fabric,
 265 };
 266
 267 /*
 268  * All item attributes appearing in /sys/kernel/target/ appear here.
 269  */
 270 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
 271         &target_core_item_attr_version,
 272         NULL,
 273 };
 274
 275 /*
 276  * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
 277  */
 278 static struct config_item_type target_core_fabrics_item = {
 279         .ct_item_ops    = &target_core_fabric_item_ops,
 280         .ct_group_ops   = &target_core_fabric_group_ops,
 281         .ct_attrs       = target_core_fabric_item_attrs,
 282         .ct_owner       = THIS_MODULE,
 283 };
 284
 285 static struct configfs_subsystem target_core_fabrics = {
 286         .su_group = {
 287                 .cg_item = {
 288                         .ci_namebuf = "target",
 289                         .ci_type = &target_core_fabrics_item,
 290                 },
 291         },
 292 };
 293
 294 struct configfs_subsystem *target_core_subsystem[] = {
 295         &target_core_fabrics,
 296         NULL,
 297 };
 298
 299 /*##############################################################################
 300 // Start functions called by external Target Fabrics Modules
 301 //############################################################################*/
 302
 303 /*
 304  * First function called by fabric modules to:
 305  *
 306  * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
 307  * 2) Add struct target_fabric_configfs to g_tf_list
 308  * 3) Return struct target_fabric_configfs to fabric module to be passed
 309  *    into target_fabric_configfs_register().
 310  */
 311 struct target_fabric_configfs *target_fabric_configfs_init(
 312         struct module *fabric_mod,
 313         const char *name)
 314 {
 315         struct target_fabric_configfs *tf;
 316
 317         if (!(name)) {
 318                 pr_err("Unable to locate passed fabric name\n");
 319                 return ERR_PTR(-EINVAL);
 320         }
 321         if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
 322                 pr_err("Passed name: %s exceeds TARGET_FABRIC"
 323                         "_NAME_SIZE\n", name);
 324                 return ERR_PTR(-EINVAL);
 325         }
 326
 327         tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
 328         if (!tf)
 329                 return ERR_PTR(-ENOMEM);
 330
 331         INIT_LIST_HEAD(&tf->tf_list);
 332         atomic_set(&tf->tf_access_cnt, 0);
 333         /*
 334          * Setup the default generic struct config_item_type's (cits) in
 335          * struct target_fabric_configfs->tf_cit_tmpl
 336          */
 337         tf->tf_module = fabric_mod;
 338         target_fabric_setup_cits(tf);
 339
 340         tf->tf_subsys = target_core_subsystem[0];
 341         snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
 342
 343         mutex_lock(&g_tf_lock);
 344         list_add_tail(&tf->tf_list, &g_tf_list);
 345         mutex_unlock(&g_tf_lock);
 346
 347         pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
 348                         ">>>>>>>>>>>>>>\n");
 349         pr_debug("Initialized struct target_fabric_configfs: %p for"
 350                         " %s\n", tf, tf->tf_name);
 351         return tf;
 352 }
 353 EXPORT_SYMBOL(target_fabric_configfs_init);
 354
 355 /*
 356  * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
 357  */
 358 void target_fabric_configfs_free(
 359         struct target_fabric_configfs *tf)
 360 {
 361         mutex_lock(&g_tf_lock);
 362         list_del(&tf->tf_list);
 363         mutex_unlock(&g_tf_lock);
 364
 365         kfree(tf);
 366 }
 367 EXPORT_SYMBOL(target_fabric_configfs_free);
 368
 369 /*
 370  * Perform a sanity check of the passed tf->tf_ops before completing
 371  * TCM fabric module registration.
 372  */
 373 static int target_fabric_tf_ops_check(
 374         struct target_fabric_configfs *tf)
 375 {
 376         struct target_core_fabric_ops *tfo = &tf->tf_ops;
 377
 378         if (!tfo->get_fabric_name) {
 379                 pr_err("Missing tfo->get_fabric_name()\n");
 380                 return -EINVAL;
 381         }
 382         if (!tfo->get_fabric_proto_ident) {
 383                 pr_err("Missing tfo->get_fabric_proto_ident()\n");
 384                 return -EINVAL;
 385         }
 386         if (!tfo->tpg_get_wwn) {
 387                 pr_err("Missing tfo->tpg_get_wwn()\n");
 388                 return -EINVAL;
 389         }
 390         if (!tfo->tpg_get_tag) {
 391                 pr_err("Missing tfo->tpg_get_tag()\n");
 392                 return -EINVAL;
 393         }
 394         if (!tfo->tpg_get_default_depth) {
 395                 pr_err("Missing tfo->tpg_get_default_depth()\n");
 396                 return -EINVAL;
 397         }
 398         if (!tfo->tpg_get_pr_transport_id) {
 399                 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
 400                 return -EINVAL;
 401         }
 402         if (!tfo->tpg_get_pr_transport_id_len) {
 403                 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
 404                 return -EINVAL;
 405         }
 406         if (!tfo->tpg_check_demo_mode) {
 407                 pr_err("Missing tfo->tpg_check_demo_mode()\n");
 408                 return -EINVAL;
 409         }
 410         if (!tfo->tpg_check_demo_mode_cache) {
 411                 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
 412                 return -EINVAL;
 413         }
 414         if (!tfo->tpg_check_demo_mode_write_protect) {
 415                 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
 416                 return -EINVAL;
 417         }
 418         if (!tfo->tpg_check_prod_mode_write_protect) {
 419                 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
 420                 return -EINVAL;
 421         }
 422         if (!tfo->tpg_alloc_fabric_acl) {
 423                 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
 424                 return -EINVAL;
 425         }
 426         if (!tfo->tpg_release_fabric_acl) {
 427                 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
 428                 return -EINVAL;
 429         }
 430         if (!tfo->tpg_get_inst_index) {
 431                 pr_err("Missing tfo->tpg_get_inst_index()\n");
 432                 return -EINVAL;
 433         }
 434         if (!tfo->release_cmd) {
 435                 pr_err("Missing tfo->release_cmd()\n");
 436                 return -EINVAL;
 437         }
 438         if (!tfo->shutdown_session) {
 439                 pr_err("Missing tfo->shutdown_session()\n");
 440                 return -EINVAL;
 441         }
 442         if (!tfo->close_session) {
 443                 pr_err("Missing tfo->close_session()\n");
 444                 return -EINVAL;
 445         }
 446         if (!tfo->sess_get_index) {
 447                 pr_err("Missing tfo->sess_get_index()\n");
 448                 return -EINVAL;
 449         }
 450         if (!tfo->write_pending) {
 451                 pr_err("Missing tfo->write_pending()\n");
 452                 return -EINVAL;
 453         }
 454         if (!tfo->write_pending_status) {
 455                 pr_err("Missing tfo->write_pending_status()\n");
 456                 return -EINVAL;
 457         }
 458         if (!tfo->set_default_node_attributes) {
 459                 pr_err("Missing tfo->set_default_node_attributes()\n");
 460                 return -EINVAL;
 461         }
 462         if (!tfo->get_task_tag) {
 463                 pr_err("Missing tfo->get_task_tag()\n");
 464                 return -EINVAL;
 465         }
 466         if (!tfo->get_cmd_state) {
 467                 pr_err("Missing tfo->get_cmd_state()\n");
 468                 return -EINVAL;
 469         }
 470         if (!tfo->queue_data_in) {
 471                 pr_err("Missing tfo->queue_data_in()\n");
 472                 return -EINVAL;
 473         }
 474         if (!tfo->queue_status) {
 475                 pr_err("Missing tfo->queue_status()\n");
 476                 return -EINVAL;
 477         }
 478         if (!tfo->queue_tm_rsp) {
 479                 pr_err("Missing tfo->queue_tm_rsp()\n");
 480                 return -EINVAL;
 481         }
 482         if (!tfo->aborted_task) {
 483                 pr_err("Missing tfo->aborted_task()\n");
 484                 return -EINVAL;
 485         }
 486         /*
 487          * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
 488          * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
 489          * target_core_fabric_configfs.c WWN+TPG group context code.
 490          */
 491         if (!tfo->fabric_make_wwn) {
 492                 pr_err("Missing tfo->fabric_make_wwn()\n");
 493                 return -EINVAL;
 494         }
 495         if (!tfo->fabric_drop_wwn) {
 496                 pr_err("Missing tfo->fabric_drop_wwn()\n");
 497                 return -EINVAL;
 498         }
 499         if (!tfo->fabric_make_tpg) {
 500                 pr_err("Missing tfo->fabric_make_tpg()\n");
 501                 return -EINVAL;
 502         }
 503         if (!tfo->fabric_drop_tpg) {
 504                 pr_err("Missing tfo->fabric_drop_tpg()\n");
 505                 return -EINVAL;
 506         }
 507
 508         return 0;
 509 }
 510
 511 /*
 512  * Called 2nd from fabric module with returned parameter of
 513  * struct target_fabric_configfs * from target_fabric_configfs_init().
 514  *
 515  * Upon a successful registration, the new fabric's struct config_item is
 516  * return.  Also, a pointer to this struct is set in the passed
 517  * struct target_fabric_configfs.
 518  */
 519 int target_fabric_configfs_register(
 520         struct target_fabric_configfs *tf)
 521 {
 522         int ret;
 523
 524         if (!tf) {
 525                 pr_err("Unable to locate target_fabric_configfs"
 526                         " pointer\n");
 527                 return -EINVAL;
 528         }
 529         if (!tf->tf_subsys) {
 530                 pr_err("Unable to target struct config_subsystem"
 531                         " pointer\n");
 532                 return -EINVAL;
 533         }
 534         ret = target_fabric_tf_ops_check(tf);
 535         if (ret < 0)
 536                 return ret;
 537
 538         pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
 539                 ">>>>>>>>>>\n");
 540         return 0;
 541 }
 542 EXPORT_SYMBOL(target_fabric_configfs_register);
 543
 544 void target_fabric_configfs_deregister(
 545         struct target_fabric_configfs *tf)
 546 {
 547         struct configfs_subsystem *su;
 548
 549         if (!tf) {
 550                 pr_err("Unable to locate passed target_fabric_"
 551                         "configfs\n");
 552                 return;
 553         }
 554         su = tf->tf_subsys;
 555         if (!su) {
 556                 pr_err("Unable to locate passed tf->tf_subsys"
 557                         " pointer\n");
 558                 return;
 559         }
 560         pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
 561                         ">>>>>>>>>>>>\n");
 562         mutex_lock(&g_tf_lock);
 563         if (atomic_read(&tf->tf_access_cnt)) {
 564                 mutex_unlock(&g_tf_lock);
 565                 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
 566                         tf->tf_name);
 567                 BUG();
 568         }
 569         list_del(&tf->tf_list);
 570         mutex_unlock(&g_tf_lock);
 571
 572         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
 573                         " %s\n", tf->tf_name);
 574         tf->tf_module = NULL;
 575         tf->tf_subsys = NULL;
 576         kfree(tf);
 577
 578         pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
 579                         ">>>>>\n");
 580 }
 581 EXPORT_SYMBOL(target_fabric_configfs_deregister);
 582
 583 /*##############################################################################
 584 // Stop functions called by external Target Fabrics Modules
 585 //############################################################################*/
 586
 587 /* Start functions for struct config_item_type tb_dev_attrib_cit */
 588
 589 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
 590 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
 591
 592 static struct configfs_item_operations target_core_dev_attrib_ops = {
 593         .show_attribute         = target_core_dev_attrib_attr_show,
 594         .store_attribute        = target_core_dev_attrib_attr_store,
 595 };
 596
 597 TB_CIT_SETUP(dev_attrib, &target_core_dev_attrib_ops, NULL, NULL);
 598
 599 /* End functions for struct config_item_type tb_dev_attrib_cit */
 600
 601 /*  Start functions for struct config_item_type tb_dev_wwn_cit */
 602
 603 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
 604 #define SE_DEV_WWN_ATTR(_name, _mode)                                   \
 605 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
 606                 __CONFIGFS_EATTR(_name, _mode,                          \
 607                 target_core_dev_wwn_show_attr_##_name,                  \
 608                 target_core_dev_wwn_store_attr_##_name);
 609
 610 #define SE_DEV_WWN_ATTR_RO(_name);                                      \
 611 do {                                                                    \
 612         static struct target_core_dev_wwn_attribute                     \
 613                         target_core_dev_wwn_##_name =                   \
 614                 __CONFIGFS_EATTR_RO(_name,                              \
 615                 target_core_dev_wwn_show_attr_##_name);                 \
 616 } while (0);
 617
 618 /*
 619  * VPD page 0x80 Unit serial
 620  */
 621 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
 622         struct t10_wwn *t10_wwn,
 623         char *page)
 624 {
 625         return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
 626                 &t10_wwn->unit_serial[0]);
 627 }
 628
 629 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
 630         struct t10_wwn *t10_wwn,
 631         const char *page,
 632         size_t count)
 633 {
 634         struct se_device *dev = t10_wwn->t10_dev;
 635         unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
 636
 637         /*
 638          * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
 639          * from the struct scsi_device level firmware, do not allow
 640          * VPD Unit Serial to be emulated.
 641          *
 642          * Note this struct scsi_device could also be emulating VPD
 643          * information from its drivers/scsi LLD.  But for now we assume
 644          * it is doing 'the right thing' wrt a world wide unique
 645          * VPD Unit Serial Number that OS dependent multipath can depend on.
 646          */
 647         if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
 648                 pr_err("Underlying SCSI device firmware provided VPD"
 649                         " Unit Serial, ignoring request\n");
 650                 return -EOPNOTSUPP;
 651         }
 652
 653         if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
 654                 pr_err("Emulated VPD Unit Serial exceeds"
 655                 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
 656                 return -EOVERFLOW;
 657         }
 658         /*
 659          * Check to see if any active $FABRIC_MOD exports exist.  If they
 660          * do exist, fail here as changing this information on the fly
 661          * (underneath the initiator side OS dependent multipath code)
 662          * could cause negative effects.
 663          */
 664         if (dev->export_count) {
 665                 pr_err("Unable to set VPD Unit Serial while"
 666                         " active %d $FABRIC_MOD exports exist\n",
 667                         dev->export_count);
 668                 return -EINVAL;
 669         }
 670
 671         /*
 672          * This currently assumes ASCII encoding for emulated VPD Unit Serial.
 673          *
 674          * Also, strip any newline added from the userspace
 675          * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
 676          */
 677         memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
 678         snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
 679         snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
 680                         "%s", strstrip(buf));
 681         dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
 682
 683         pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
 684                         " %s\n", dev->t10_wwn.unit_serial);
 685
 686         return count;
 687 }
 688
 689 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
 690
 691 /*
 692  * VPD page 0x83 Protocol Identifier
 693  */
 694 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
 695         struct t10_wwn *t10_wwn,
 696         char *page)
 697 {
 698         struct t10_vpd *vpd;
 699         unsigned char buf[VPD_TMP_BUF_SIZE];
 700         ssize_t len = 0;
 701
 702         memset(buf, 0, VPD_TMP_BUF_SIZE);
 703
 704         spin_lock(&t10_wwn->t10_vpd_lock);
 705         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
 706                 if (!vpd->protocol_identifier_set)
 707                         continue;
 708
 709                 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
 710
 711                 if (len + strlen(buf) >= PAGE_SIZE)
 712                         break;
 713
 714                 len += sprintf(page+len, "%s", buf);
 715         }
 716         spin_unlock(&t10_wwn->t10_vpd_lock);
 717
 718         return len;
 719 }
 720
 721 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
 722         struct t10_wwn *t10_wwn,
 723         const char *page,
 724         size_t count)
 725 {
 726         return -ENOSYS;
 727 }
 728
 729 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
 730
 731 /*
 732  * Generic wrapper for dumping VPD identifiers by association.
 733  */
 734 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc)                           \
 735 static ssize_t target_core_dev_wwn_show_attr_##_name(                   \
 736         struct t10_wwn *t10_wwn,                                        \
 737         char *page)                                                     \
 738 {                                                                       \
 739         struct t10_vpd *vpd;                                                    \
 740         unsigned char buf[VPD_TMP_BUF_SIZE];                            \
 741         ssize_t len = 0;                                                \
 742                                                                         \
 743         spin_lock(&t10_wwn->t10_vpd_lock);                              \
 744         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {    \
 745                 if (vpd->association != _assoc)                         \
 746                         continue;                                       \
 747                                                                         \
 748                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 749                 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE);   \
 750                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 751                         break;                                          \
 752                 len += sprintf(page+len, "%s", buf);                    \
 753                                                                         \
 754                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 755                 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
 756                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 757                         break;                                          \
 758                 len += sprintf(page+len, "%s", buf);                    \
 759                                                                         \
 760                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 761                 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
 762                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 763                         break;                                          \
 764                 len += sprintf(page+len, "%s", buf);                    \
 765         }                                                               \
 766         spin_unlock(&t10_wwn->t10_vpd_lock);                            \
 767                                                                         \
 768         return len;                                                     \
 769 }
 770
 771 /*
 772  * VPD page 0x83 Association: Logical Unit
 773  */
 774 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
 775
 776 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
 777         struct t10_wwn *t10_wwn,
 778         const char *page,
 779         size_t count)
 780 {
 781         return -ENOSYS;
 782 }
 783
 784 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
 785
 786 /*
 787  * VPD page 0x83 Association: Target Port
 788  */
 789 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
 790
 791 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
 792         struct t10_wwn *t10_wwn,
 793         const char *page,
 794         size_t count)
 795 {
 796         return -ENOSYS;
 797 }
 798
 799 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
 800
 801 /*
 802  * VPD page 0x83 Association: SCSI Target Device
 803  */
 804 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
 805
 806 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
 807         struct t10_wwn *t10_wwn,
 808         const char *page,
 809         size_t count)
 810 {
 811         return -ENOSYS;
 812 }
 813
 814 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
 815
 816 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
 817
 818 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
 819         &target_core_dev_wwn_vpd_unit_serial.attr,
 820         &target_core_dev_wwn_vpd_protocol_identifier.attr,
 821         &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
 822         &target_core_dev_wwn_vpd_assoc_target_port.attr,
 823         &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
 824         NULL,
 825 };
 826
 827 static struct configfs_item_operations target_core_dev_wwn_ops = {
 828         .show_attribute         = target_core_dev_wwn_attr_show,
 829         .store_attribute        = target_core_dev_wwn_attr_store,
 830 };
 831
 832 TB_CIT_SETUP(dev_wwn, &target_core_dev_wwn_ops, NULL, target_core_dev_wwn_attrs);
 833
 834 /*  End functions for struct config_item_type tb_dev_wwn_cit */
 835
 836 /*  Start functions for struct config_item_type tb_dev_pr_cit */
 837
 838 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
 839 #define SE_DEV_PR_ATTR(_name, _mode)                                    \
 840 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
 841         __CONFIGFS_EATTR(_name, _mode,                                  \
 842         target_core_dev_pr_show_attr_##_name,                           \
 843         target_core_dev_pr_store_attr_##_name);
 844
 845 #define SE_DEV_PR_ATTR_RO(_name);                                       \
 846 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
 847         __CONFIGFS_EATTR_RO(_name,                                      \
 848         target_core_dev_pr_show_attr_##_name);
 849
 850 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
 851                 char *page)
 852 {
 853         struct se_node_acl *se_nacl;
 854         struct t10_pr_registration *pr_reg;
 855         char i_buf[PR_REG_ISID_ID_LEN];
 856
 857         memset(i_buf, 0, PR_REG_ISID_ID_LEN);
 858
 859         pr_reg = dev->dev_pr_res_holder;
 860         if (!pr_reg)
 861                 return sprintf(page, "No SPC-3 Reservation holder\n");
 862
 863         se_nacl = pr_reg->pr_reg_nacl;
 864         core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
 865
 866         return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
 867                 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
 868                 se_nacl->initiatorname, i_buf);
 869 }
 870
 871 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
 872                 char *page)
 873 {
 874         struct se_node_acl *se_nacl;
 875         ssize_t len;
 876
 877         se_nacl = dev->dev_reserved_node_acl;
 878         if (se_nacl) {
 879                 len = sprintf(page,
 880                               "SPC-2 Reservation: %s Initiator: %s\n",
 881                               se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
 882                               se_nacl->initiatorname);
 883         } else {
 884                 len = sprintf(page, "No SPC-2 Reservation holder\n");
 885         }
 886         return len;
 887 }
 888
 889 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
 890                 char *page)
 891 {
 892         int ret;
 893
 894         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
 895                 return sprintf(page, "Passthrough\n");
 896
 897         spin_lock(&dev->dev_reservation_lock);
 898         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
 899                 ret = target_core_dev_pr_show_spc2_res(dev, page);
 900         else
 901                 ret = target_core_dev_pr_show_spc3_res(dev, page);
 902         spin_unlock(&dev->dev_reservation_lock);
 903         return ret;
 904 }
 905
 906 SE_DEV_PR_ATTR_RO(res_holder);
 907
 908 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
 909                 struct se_device *dev, char *page)
 910 {
 911         ssize_t len = 0;
 912
 913         spin_lock(&dev->dev_reservation_lock);
 914         if (!dev->dev_pr_res_holder) {
 915                 len = sprintf(page, "No SPC-3 Reservation holder\n");
 916         } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
 917                 len = sprintf(page, "SPC-3 Reservation: All Target"
 918                         " Ports registration\n");
 919         } else {
 920                 len = sprintf(page, "SPC-3 Reservation: Single"
 921                         " Target Port registration\n");
 922         }
 923
 924         spin_unlock(&dev->dev_reservation_lock);
 925         return len;
 926 }
 927
 928 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
 929
 930 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
 931                 struct se_device *dev, char *page)
 932 {
 933         return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
 934 }
 935
 936 SE_DEV_PR_ATTR_RO(res_pr_generation);
 937
 938 /*
 939  * res_pr_holder_tg_port
 940  */
 941 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
 942                 struct se_device *dev, char *page)
 943 {
 944         struct se_node_acl *se_nacl;
 945         struct se_lun *lun;
 946         struct se_portal_group *se_tpg;
 947         struct t10_pr_registration *pr_reg;
 948         struct target_core_fabric_ops *tfo;
 949         ssize_t len = 0;
 950
 951         spin_lock(&dev->dev_reservation_lock);
 952         pr_reg = dev->dev_pr_res_holder;
 953         if (!pr_reg) {
 954                 len = sprintf(page, "No SPC-3 Reservation holder\n");
 955                 goto out_unlock;
 956         }
 957
 958         se_nacl = pr_reg->pr_reg_nacl;
 959         se_tpg = se_nacl->se_tpg;
 960         lun = pr_reg->pr_reg_tg_pt_lun;
 961         tfo = se_tpg->se_tpg_tfo;
 962
 963         len += sprintf(page+len, "SPC-3 Reservation: %s"
 964                 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
 965                 tfo->tpg_get_wwn(se_tpg));
 966         len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
 967                 " Identifier Tag: %hu %s Portal Group Tag: %hu"
 968                 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
 969                 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
 970                 tfo->get_fabric_name(), lun->unpacked_lun);
 971
 972 out_unlock:
 973         spin_unlock(&dev->dev_reservation_lock);
 974         return len;
 975 }
 976
 977 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
 978
 979 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
 980                 struct se_device *dev, char *page)
 981 {
 982         struct target_core_fabric_ops *tfo;
 983         struct t10_pr_registration *pr_reg;
 984         unsigned char buf[384];
 985         char i_buf[PR_REG_ISID_ID_LEN];
 986         ssize_t len = 0;
 987         int reg_count = 0;
 988
 989         len += sprintf(page+len, "SPC-3 PR Registrations:\n");
 990
 991         spin_lock(&dev->t10_pr.registration_lock);
 992         list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
 993                         pr_reg_list) {
 994
 995                 memset(buf, 0, 384);
 996                 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
 997                 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
 998                 core_pr_dump_initiator_port(pr_reg, i_buf,
 999                                         PR_REG_ISID_ID_LEN);
1000                 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1001                         tfo->get_fabric_name(),
1002                         pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1003                         pr_reg->pr_res_generation);
1004
1005                 if (len + strlen(buf) >= PAGE_SIZE)
1006                         break;
1007
1008                 len += sprintf(page+len, "%s", buf);
1009                 reg_count++;
1010         }
1011         spin_unlock(&dev->t10_pr.registration_lock);
1012
1013         if (!reg_count)
1014                 len += sprintf(page+len, "None\n");
1015
1016         return len;
1017 }
1018
1019 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1020
1021 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1022                 struct se_device *dev, char *page)
1023 {
1024         struct t10_pr_registration *pr_reg;
1025         ssize_t len = 0;
1026
1027         spin_lock(&dev->dev_reservation_lock);
1028         pr_reg = dev->dev_pr_res_holder;
1029         if (pr_reg) {
1030                 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1031                         core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1032         } else {
1033                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1034         }
1035
1036         spin_unlock(&dev->dev_reservation_lock);
1037         return len;
1038 }
1039
1040 SE_DEV_PR_ATTR_RO(res_pr_type);
1041
1042 static ssize_t target_core_dev_pr_show_attr_res_type(
1043                 struct se_device *dev, char *page)
1044 {
1045         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1046                 return sprintf(page, "SPC_PASSTHROUGH\n");
1047         else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1048                 return sprintf(page, "SPC2_RESERVATIONS\n");
1049         else
1050                 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1051 }
1052
1053 SE_DEV_PR_ATTR_RO(res_type);
1054
1055 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1056                 struct se_device *dev, char *page)
1057 {
1058         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1059                 return 0;
1060
1061         return sprintf(page, "APTPL Bit Status: %s\n",
1062                 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1063 }
1064
1065 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1066
1067 /*
1068  * res_aptpl_metadata
1069  */
1070 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1071                 struct se_device *dev, char *page)
1072 {
1073         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1074                 return 0;
1075
1076         return sprintf(page, "Ready to process PR APTPL metadata..\n");
1077 }
1078
1079 enum {
1080         Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1081         Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1082         Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1083         Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1084 };
1085
1086 static match_table_t tokens = {
1087         {Opt_initiator_fabric, "initiator_fabric=%s"},
1088         {Opt_initiator_node, "initiator_node=%s"},
1089         {Opt_initiator_sid, "initiator_sid=%s"},
1090         {Opt_sa_res_key, "sa_res_key=%s"},
1091         {Opt_res_holder, "res_holder=%d"},
1092         {Opt_res_type, "res_type=%d"},
1093         {Opt_res_scope, "res_scope=%d"},
1094         {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1095         {Opt_mapped_lun, "mapped_lun=%d"},
1096         {Opt_target_fabric, "target_fabric=%s"},
1097         {Opt_target_node, "target_node=%s"},
1098         {Opt_tpgt, "tpgt=%d"},
1099         {Opt_port_rtpi, "port_rtpi=%d"},
1100         {Opt_target_lun, "target_lun=%d"},
1101         {Opt_err, NULL}
1102 };
1103
1104 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1105         struct se_device *dev,
1106         const char *page,
1107         size_t count)
1108 {
1109         unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1110         unsigned char *t_fabric = NULL, *t_port = NULL;
1111         char *orig, *ptr, *opts;
1112         substring_t args[MAX_OPT_ARGS];
1113         unsigned long long tmp_ll;
1114         u64 sa_res_key = 0;
1115         u32 mapped_lun = 0, target_lun = 0;
1116         int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1117         u16 port_rpti = 0, tpgt = 0;
1118         u8 type = 0, scope;
1119
1120         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1121                 return 0;
1122         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1123                 return 0;
1124
1125         if (dev->export_count) {
1126                 pr_debug("Unable to process APTPL metadata while"
1127                         " active fabric exports exist\n");
1128                 return -EINVAL;
1129         }
1130
1131         opts = kstrdup(page, GFP_KERNEL);
1132         if (!opts)
1133                 return -ENOMEM;
1134
1135         orig = opts;
1136         while ((ptr = strsep(&opts, ",\n")) != NULL) {
1137                 if (!*ptr)
1138                         continue;
1139
1140                 token = match_token(ptr, tokens, args);
1141                 switch (token) {
1142                 case Opt_initiator_fabric:
1143                         i_fabric = match_strdup(args);
1144                         if (!i_fabric) {
1145                                 ret = -ENOMEM;
1146                                 goto out;
1147                         }
1148                         break;
1149                 case Opt_initiator_node:
1150                         i_port = match_strdup(args);
1151                         if (!i_port) {
1152                                 ret = -ENOMEM;
1153                                 goto out;
1154                         }
1155                         if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1156                                 pr_err("APTPL metadata initiator_node="
1157                                         " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1158                                         PR_APTPL_MAX_IPORT_LEN);
1159                                 ret = -EINVAL;
1160                                 break;
1161                         }
1162                         break;
1163                 case Opt_initiator_sid:
1164                         isid = match_strdup(args);
1165                         if (!isid) {
1166                                 ret = -ENOMEM;
1167                                 goto out;
1168                         }
1169                         if (strlen(isid) >= PR_REG_ISID_LEN) {
1170                                 pr_err("APTPL metadata initiator_isid"
1171                                         "= exceeds PR_REG_ISID_LEN: %d\n",
1172                                         PR_REG_ISID_LEN);
1173                                 ret = -EINVAL;
1174                                 break;
1175                         }
1176                         break;
1177                 case Opt_sa_res_key:
1178                         ret = kstrtoull(args->from, 0, &tmp_ll);
1179                         if (ret < 0) {
1180                                 pr_err("kstrtoull() failed for sa_res_key=\n");
1181                                 goto out;
1182                         }
1183                         sa_res_key = (u64)tmp_ll;
1184                         break;
1185                 /*
1186                  * PR APTPL Metadata for Reservation
1187                  */
1188                 case Opt_res_holder:
1189                         match_int(args, &arg);
1190                         res_holder = arg;
1191                         break;
1192                 case Opt_res_type:
1193                         match_int(args, &arg);
1194                         type = (u8)arg;
1195                         break;
1196                 case Opt_res_scope:
1197                         match_int(args, &arg);
1198                         scope = (u8)arg;
1199                         break;
1200                 case Opt_res_all_tg_pt:
1201                         match_int(args, &arg);
1202                         all_tg_pt = (int)arg;
1203                         break;
1204                 case Opt_mapped_lun:
1205                         match_int(args, &arg);
1206                         mapped_lun = (u32)arg;
1207                         break;
1208                 /*
1209                  * PR APTPL Metadata for Target Port
1210                  */
1211                 case Opt_target_fabric:
1212                         t_fabric = match_strdup(args);
1213                         if (!t_fabric) {
1214                                 ret = -ENOMEM;
1215                                 goto out;
1216                         }
1217                         break;
1218                 case Opt_target_node:
1219                         t_port = match_strdup(args);
1220                         if (!t_port) {
1221                                 ret = -ENOMEM;
1222                                 goto out;
1223                         }
1224                         if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1225                                 pr_err("APTPL metadata target_node="
1226                                         " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1227                                         PR_APTPL_MAX_TPORT_LEN);
1228                                 ret = -EINVAL;
1229                                 break;
1230                         }
1231                         break;
1232                 case Opt_tpgt:
1233                         match_int(args, &arg);
1234                         tpgt = (u16)arg;
1235                         break;
1236                 case Opt_port_rtpi:
1237                         match_int(args, &arg);
1238                         port_rpti = (u16)arg;
1239                         break;
1240                 case Opt_target_lun:
1241                         match_int(args, &arg);
1242                         target_lun = (u32)arg;
1243                         break;
1244                 default:
1245                         break;
1246                 }
1247         }
1248
1249         if (!i_port || !t_port || !sa_res_key) {
1250                 pr_err("Illegal parameters for APTPL registration\n");
1251                 ret = -EINVAL;
1252                 goto out;
1253         }
1254
1255         if (res_holder && !(type)) {
1256                 pr_err("Illegal PR type: 0x%02x for reservation"
1257                                 " holder\n", type);
1258                 ret = -EINVAL;
1259                 goto out;
1260         }
1261
1262         ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1263                         i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1264                         res_holder, all_tg_pt, type);
1265 out:
1266         kfree(i_fabric);
1267         kfree(i_port);
1268         kfree(isid);
1269         kfree(t_fabric);
1270         kfree(t_port);
1271         kfree(orig);
1272         return (ret == 0) ? count : ret;
1273 }
1274
1275 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1276
1277 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
1278
1279 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1280         &target_core_dev_pr_res_holder.attr,
1281         &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1282         &target_core_dev_pr_res_pr_generation.attr,
1283         &target_core_dev_pr_res_pr_holder_tg_port.attr,
1284         &target_core_dev_pr_res_pr_registered_i_pts.attr,
1285         &target_core_dev_pr_res_pr_type.attr,
1286         &target_core_dev_pr_res_type.attr,
1287         &target_core_dev_pr_res_aptpl_active.attr,
1288         &target_core_dev_pr_res_aptpl_metadata.attr,
1289         NULL,
1290 };
1291
1292 static struct configfs_item_operations target_core_dev_pr_ops = {
1293         .show_attribute         = target_core_dev_pr_attr_show,
1294         .store_attribute        = target_core_dev_pr_attr_store,
1295 };
1296
1297 TB_CIT_SETUP(dev_pr, &target_core_dev_pr_ops, NULL, target_core_dev_pr_attrs);
1298
1299 /*  End functions for struct config_item_type tb_dev_pr_cit */
1300
1301 /*  Start functions for struct config_item_type tb_dev_cit */
1302
1303 static ssize_t target_core_show_dev_info(void *p, char *page)
1304 {
1305         struct se_device *dev = p;
1306         struct se_subsystem_api *t = dev->transport;
1307         int bl = 0;
1308         ssize_t read_bytes = 0;
1309
1310         transport_dump_dev_state(dev, page, &bl);
1311         read_bytes += bl;
1312         read_bytes += t->show_configfs_dev_params(dev, page+read_bytes);
1313         return read_bytes;
1314 }
1315
1316 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1317         .attr   = { .ca_owner = THIS_MODULE,
1318                     .ca_name = "info",
1319                     .ca_mode = S_IRUGO },
1320         .show   = target_core_show_dev_info,
1321         .store  = NULL,
1322 };
1323
1324 static ssize_t target_core_store_dev_control(
1325         void *p,
1326         const char *page,
1327         size_t count)
1328 {
1329         struct se_device *dev = p;
1330         struct se_subsystem_api *t = dev->transport;
1331
1332         return t->set_configfs_dev_params(dev, page, count);
1333 }
1334
1335 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1336         .attr   = { .ca_owner = THIS_MODULE,
1337                     .ca_name = "control",
1338                     .ca_mode = S_IWUSR },
1339         .show   = NULL,
1340         .store  = target_core_store_dev_control,
1341 };
1342
1343 static ssize_t target_core_show_dev_alias(void *p, char *page)
1344 {
1345         struct se_device *dev = p;
1346
1347         if (!(dev->dev_flags & DF_USING_ALIAS))
1348                 return 0;
1349
1350         return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1351 }
1352
1353 static ssize_t target_core_store_dev_alias(
1354         void *p,
1355         const char *page,
1356         size_t count)
1357 {
1358         struct se_device *dev = p;
1359         struct se_hba *hba = dev->se_hba;
1360         ssize_t read_bytes;
1361
1362         if (count > (SE_DEV_ALIAS_LEN-1)) {
1363                 pr_err("alias count: %d exceeds"
1364                         " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1365                         SE_DEV_ALIAS_LEN-1);
1366                 return -EINVAL;
1367         }
1368
1369         read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1370         if (!read_bytes)
1371                 return -EINVAL;
1372         if (dev->dev_alias[read_bytes - 1] == '\n')
1373                 dev->dev_alias[read_bytes - 1] = '\0';
1374
1375         dev->dev_flags |= DF_USING_ALIAS;
1376
1377         pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1378                 config_item_name(&hba->hba_group.cg_item),
1379                 config_item_name(&dev->dev_group.cg_item),
1380                 dev->dev_alias);
1381
1382         return read_bytes;
1383 }
1384
1385 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1386         .attr   = { .ca_owner = THIS_MODULE,
1387                     .ca_name = "alias",
1388                     .ca_mode =  S_IRUGO | S_IWUSR },
1389         .show   = target_core_show_dev_alias,
1390         .store  = target_core_store_dev_alias,
1391 };
1392
1393 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1394 {
1395         struct se_device *dev = p;
1396
1397         if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1398                 return 0;
1399
1400         return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1401 }
1402
1403 static ssize_t target_core_store_dev_udev_path(
1404         void *p,
1405         const char *page,
1406         size_t count)
1407 {
1408         struct se_device *dev = p;
1409         struct se_hba *hba = dev->se_hba;
1410         ssize_t read_bytes;
1411
1412         if (count > (SE_UDEV_PATH_LEN-1)) {
1413                 pr_err("udev_path count: %d exceeds"
1414                         " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1415                         SE_UDEV_PATH_LEN-1);
1416                 return -EINVAL;
1417         }
1418
1419         read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1420                         "%s", page);
1421         if (!read_bytes)
1422                 return -EINVAL;
1423         if (dev->udev_path[read_bytes - 1] == '\n')
1424                 dev->udev_path[read_bytes - 1] = '\0';
1425
1426         dev->dev_flags |= DF_USING_UDEV_PATH;
1427
1428         pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1429                 config_item_name(&hba->hba_group.cg_item),
1430                 config_item_name(&dev->dev_group.cg_item),
1431                 dev->udev_path);
1432
1433         return read_bytes;
1434 }
1435
1436 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1437         .attr   = { .ca_owner = THIS_MODULE,
1438                     .ca_name = "udev_path",
1439                     .ca_mode =  S_IRUGO | S_IWUSR },
1440         .show   = target_core_show_dev_udev_path,
1441         .store  = target_core_store_dev_udev_path,
1442 };
1443
1444 static ssize_t target_core_show_dev_enable(void *p, char *page)
1445 {
1446         struct se_device *dev = p;
1447
1448         return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1449 }
1450
1451 static ssize_t target_core_store_dev_enable(
1452         void *p,
1453         const char *page,
1454         size_t count)
1455 {
1456         struct se_device *dev = p;
1457         char *ptr;
1458         int ret;
1459
1460         ptr = strstr(page, "1");
1461         if (!ptr) {
1462                 pr_err("For dev_enable ops, only valid value"
1463                                 " is \"1\"\n");
1464                 return -EINVAL;
1465         }
1466
1467         ret = target_configure_device(dev);
1468         if (ret)
1469                 return ret;
1470         return count;
1471 }
1472
1473 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1474         .attr   = { .ca_owner = THIS_MODULE,
1475                     .ca_name = "enable",
1476                     .ca_mode =  S_IRUGO | S_IWUSR },
1477         .show   = target_core_show_dev_enable,
1478         .store  = target_core_store_dev_enable,
1479 };
1480
1481 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1482 {
1483         struct se_device *dev = p;
1484         struct config_item *lu_ci;
1485         struct t10_alua_lu_gp *lu_gp;
1486         struct t10_alua_lu_gp_member *lu_gp_mem;
1487         ssize_t len = 0;
1488
1489         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1490         if (!lu_gp_mem)
1491                 return 0;
1492
1493         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1494         lu_gp = lu_gp_mem->lu_gp;
1495         if (lu_gp) {
1496                 lu_ci = &lu_gp->lu_gp_group.cg_item;
1497                 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1498                         config_item_name(lu_ci), lu_gp->lu_gp_id);
1499         }
1500         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1501
1502         return len;
1503 }
1504
1505 static ssize_t target_core_store_alua_lu_gp(
1506         void *p,
1507         const char *page,
1508         size_t count)
1509 {
1510         struct se_device *dev = p;
1511         struct se_hba *hba = dev->se_hba;
1512         struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1513         struct t10_alua_lu_gp_member *lu_gp_mem;
1514         unsigned char buf[LU_GROUP_NAME_BUF];
1515         int move = 0;
1516
1517         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1518         if (!lu_gp_mem)
1519                 return 0;
1520
1521         if (count > LU_GROUP_NAME_BUF) {
1522                 pr_err("ALUA LU Group Alias too large!\n");
1523                 return -EINVAL;
1524         }
1525         memset(buf, 0, LU_GROUP_NAME_BUF);
1526         memcpy(buf, page, count);
1527         /*
1528          * Any ALUA logical unit alias besides "NULL" means we will be
1529          * making a new group association.
1530          */
1531         if (strcmp(strstrip(buf), "NULL")) {
1532                 /*
1533                  * core_alua_get_lu_gp_by_name() will increment reference to
1534                  * struct t10_alua_lu_gp.  This reference is released with
1535                  * core_alua_get_lu_gp_by_name below().
1536                  */
1537                 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1538                 if (!lu_gp_new)
1539                         return -ENODEV;
1540         }
1541
1542         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1543         lu_gp = lu_gp_mem->lu_gp;
1544         if (lu_gp) {
1545                 /*
1546                  * Clearing an existing lu_gp association, and replacing
1547                  * with NULL
1548                  */
1549                 if (!lu_gp_new) {
1550                         pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1551                                 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1552                                 " %hu\n",
1553                                 config_item_name(&hba->hba_group.cg_item),
1554                                 config_item_name(&dev->dev_group.cg_item),
1555                                 config_item_name(&lu_gp->lu_gp_group.cg_item),
1556                                 lu_gp->lu_gp_id);
1557
1558                         __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1559                         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1560
1561                         return count;
1562                 }
1563                 /*
1564                  * Removing existing association of lu_gp_mem with lu_gp
1565                  */
1566                 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1567                 move = 1;
1568         }
1569         /*
1570          * Associate lu_gp_mem with lu_gp_new.
1571          */
1572         __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1573         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1574
1575         pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1576                 " core/alua/lu_gps/%s, ID: %hu\n",
1577                 (move) ? "Moving" : "Adding",
1578                 config_item_name(&hba->hba_group.cg_item),
1579                 config_item_name(&dev->dev_group.cg_item),
1580                 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1581                 lu_gp_new->lu_gp_id);
1582
1583         core_alua_put_lu_gp_from_name(lu_gp_new);
1584         return count;
1585 }
1586
1587 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1588         .attr   = { .ca_owner = THIS_MODULE,
1589                     .ca_name = "alua_lu_gp",
1590                     .ca_mode = S_IRUGO | S_IWUSR },
1591         .show   = target_core_show_alua_lu_gp,
1592         .store  = target_core_store_alua_lu_gp,
1593 };
1594
1595 static ssize_t target_core_show_dev_lba_map(void *p, char *page)
1596 {
1597         struct se_device *dev = p;
1598         struct t10_alua_lba_map *map;
1599         struct t10_alua_lba_map_member *mem;
1600         char *b = page;
1601         int bl = 0;
1602         char state;
1603
1604         spin_lock(&dev->t10_alua.lba_map_lock);
1605         if (!list_empty(&dev->t10_alua.lba_map_list))
1606             bl += sprintf(b + bl, "%u %u\n",
1607                           dev->t10_alua.lba_map_segment_size,
1608                           dev->t10_alua.lba_map_segment_multiplier);
1609         list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
1610                 bl += sprintf(b + bl, "%llu %llu",
1611                               map->lba_map_first_lba, map->lba_map_last_lba);
1612                 list_for_each_entry(mem, &map->lba_map_mem_list,
1613                                     lba_map_mem_list) {
1614                         switch (mem->lba_map_mem_alua_state) {
1615                         case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
1616                                 state = 'O';
1617                                 break;
1618                         case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
1619                                 state = 'A';
1620                                 break;
1621                         case ALUA_ACCESS_STATE_STANDBY:
1622                                 state = 'S';
1623                                 break;
1624                         case ALUA_ACCESS_STATE_UNAVAILABLE:
1625                                 state = 'U';
1626                                 break;
1627                         default:
1628                                 state = '.';
1629                                 break;
1630                         }
1631                         bl += sprintf(b + bl, " %d:%c",
1632                                       mem->lba_map_mem_alua_pg_id, state);
1633                 }
1634                 bl += sprintf(b + bl, "\n");
1635         }
1636         spin_unlock(&dev->t10_alua.lba_map_lock);
1637         return bl;
1638 }
1639
1640 static ssize_t target_core_store_dev_lba_map(
1641         void *p,
1642         const char *page,
1643         size_t count)
1644 {
1645         struct se_device *dev = p;
1646         struct t10_alua_lba_map *lba_map = NULL;
1647         struct list_head lba_list;
1648         char *map_entries, *ptr;
1649         char state;
1650         int pg_num = -1, pg;
1651         int ret = 0, num = 0, pg_id, alua_state;
1652         unsigned long start_lba = -1, end_lba = -1;
1653         unsigned long segment_size = -1, segment_mult = -1;
1654
1655         map_entries = kstrdup(page, GFP_KERNEL);
1656         if (!map_entries)
1657                 return -ENOMEM;
1658
1659         INIT_LIST_HEAD(&lba_list);
1660         while ((ptr = strsep(&map_entries, "\n")) != NULL) {
1661                 if (!*ptr)
1662                         continue;
1663
1664                 if (num == 0) {
1665                         if (sscanf(ptr, "%lu %lu\n",
1666                                    &segment_size, &segment_mult) != 2) {
1667                                 pr_err("Invalid line %d\n", num);
1668                                 ret = -EINVAL;
1669                                 break;
1670                         }
1671                         num++;
1672                         continue;
1673                 }
1674                 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
1675                         pr_err("Invalid line %d\n", num);
1676                         ret = -EINVAL;
1677                         break;
1678                 }
1679                 ptr = strchr(ptr, ' ');
1680                 if (!ptr) {
1681                         pr_err("Invalid line %d, missing end lba\n", num);
1682                         ret = -EINVAL;
1683                         break;
1684                 }
1685                 ptr++;
1686                 ptr = strchr(ptr, ' ');
1687                 if (!ptr) {
1688                         pr_err("Invalid line %d, missing state definitions\n",
1689                                num);
1690                         ret = -EINVAL;
1691                         break;
1692                 }
1693                 ptr++;
1694                 lba_map = core_alua_allocate_lba_map(&lba_list,
1695                                                      start_lba, end_lba);
1696                 if (IS_ERR(lba_map)) {
1697                         ret = PTR_ERR(lba_map);
1698                         break;
1699                 }
1700                 pg = 0;
1701                 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
1702                         switch (state) {
1703                         case 'O':
1704                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
1705                                 break;
1706                         case 'A':
1707                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
1708                                 break;
1709                         case 'S':
1710                                 alua_state = ALUA_ACCESS_STATE_STANDBY;
1711                                 break;
1712                         case 'U':
1713                                 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
1714                                 break;
1715                         default:
1716                                 pr_err("Invalid ALUA state '%c'\n", state);
1717                                 ret = -EINVAL;
1718                                 goto out;
1719                         }
1720
1721                         ret = core_alua_allocate_lba_map_mem(lba_map,
1722                                                              pg_id, alua_state);
1723                         if (ret) {
1724                                 pr_err("Invalid target descriptor %d:%c "
1725                                        "at line %d\n",
1726                                        pg_id, state, num);
1727                                 break;
1728                         }
1729                         pg++;
1730                         ptr = strchr(ptr, ' ');
1731                         if (ptr)
1732                                 ptr++;
1733                         else
1734                                 break;
1735                 }
1736                 if (pg_num == -1)
1737                     pg_num = pg;
1738                 else if (pg != pg_num) {
1739                         pr_err("Only %d from %d port groups definitions "
1740                                "at line %d\n", pg, pg_num, num);
1741                         ret = -EINVAL;
1742                         break;
1743                 }
1744                 num++;
1745         }
1746 out:
1747         if (ret) {
1748                 core_alua_free_lba_map(&lba_list);
1749                 count = ret;
1750         } else
1751                 core_alua_set_lba_map(dev, &lba_list,
1752                                       segment_size, segment_mult);
1753         kfree(map_entries);
1754         return count;
1755 }
1756
1757 static struct target_core_configfs_attribute target_core_attr_dev_lba_map = {
1758         .attr   = { .ca_owner = THIS_MODULE,
1759                     .ca_name = "lba_map",
1760                     .ca_mode = S_IRUGO | S_IWUSR },
1761         .show   = target_core_show_dev_lba_map,
1762         .store  = target_core_store_dev_lba_map,
1763 };
1764
1765 static struct configfs_attribute *target_core_dev_attrs[] = {
1766         &target_core_attr_dev_info.attr,
1767         &target_core_attr_dev_control.attr,
1768         &target_core_attr_dev_alias.attr,
1769         &target_core_attr_dev_udev_path.attr,
1770         &target_core_attr_dev_enable.attr,
1771         &target_core_attr_dev_alua_lu_gp.attr,
1772         &target_core_attr_dev_lba_map.attr,
1773         NULL,
1774 };
1775
1776 static void target_core_dev_release(struct config_item *item)
1777 {
1778         struct config_group *dev_cg = to_config_group(item);
1779         struct se_device *dev =
1780                 container_of(dev_cg, struct se_device, dev_group);
1781
1782         kfree(dev_cg->default_groups);
1783         target_free_device(dev);
1784 }
1785
1786 static ssize_t target_core_dev_show(struct config_item *item,
1787                                      struct configfs_attribute *attr,
1788                                      char *page)
1789 {
1790         struct config_group *dev_cg = to_config_group(item);
1791         struct se_device *dev =
1792                 container_of(dev_cg, struct se_device, dev_group);
1793         struct target_core_configfs_attribute *tc_attr = container_of(
1794                         attr, struct target_core_configfs_attribute, attr);
1795
1796         if (!tc_attr->show)
1797                 return -EINVAL;
1798
1799         return tc_attr->show(dev, page);
1800 }
1801
1802 static ssize_t target_core_dev_store(struct config_item *item,
1803                                       struct configfs_attribute *attr,
1804                                       const char *page, size_t count)
1805 {
1806         struct config_group *dev_cg = to_config_group(item);
1807         struct se_device *dev =
1808                 container_of(dev_cg, struct se_device, dev_group);
1809         struct target_core_configfs_attribute *tc_attr = container_of(
1810                         attr, struct target_core_configfs_attribute, attr);
1811
1812         if (!tc_attr->store)
1813                 return -EINVAL;
1814
1815         return tc_attr->store(dev, page, count);
1816 }
1817
1818 static struct configfs_item_operations target_core_dev_item_ops = {
1819         .release                = target_core_dev_release,
1820         .show_attribute         = target_core_dev_show,
1821         .store_attribute        = target_core_dev_store,
1822 };
1823
1824 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
1825
1826 /* End functions for struct config_item_type tb_dev_cit */
1827
1828 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
1829
1830 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
1831 #define SE_DEV_ALUA_LU_ATTR(_name, _mode)                               \
1832 static struct target_core_alua_lu_gp_attribute                          \
1833                         target_core_alua_lu_gp_##_name =                \
1834         __CONFIGFS_EATTR(_name, _mode,                                  \
1835         target_core_alua_lu_gp_show_attr_##_name,                       \
1836         target_core_alua_lu_gp_store_attr_##_name);
1837
1838 #define SE_DEV_ALUA_LU_ATTR_RO(_name)                                   \
1839 static struct target_core_alua_lu_gp_attribute                          \
1840                         target_core_alua_lu_gp_##_name =                \
1841         __CONFIGFS_EATTR_RO(_name,                                      \
1842         target_core_alua_lu_gp_show_attr_##_name);
1843
1844 /*
1845  * lu_gp_id
1846  */
1847 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
1848         struct t10_alua_lu_gp *lu_gp,
1849         char *page)
1850 {
1851         if (!lu_gp->lu_gp_valid_id)
1852                 return 0;
1853
1854         return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
1855 }
1856
1857 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
1858         struct t10_alua_lu_gp *lu_gp,
1859         const char *page,
1860         size_t count)
1861 {
1862         struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
1863         unsigned long lu_gp_id;
1864         int ret;
1865
1866         ret = kstrtoul(page, 0, &lu_gp_id);
1867         if (ret < 0) {
1868                 pr_err("kstrtoul() returned %d for"
1869                         " lu_gp_id\n", ret);
1870                 return ret;
1871         }
1872         if (lu_gp_id > 0x0000ffff) {
1873                 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
1874                         " 0x0000ffff\n", lu_gp_id);
1875                 return -EINVAL;
1876         }
1877
1878         ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
1879         if (ret < 0)
1880                 return -EINVAL;
1881
1882         pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
1883                 " Group: core/alua/lu_gps/%s to ID: %hu\n",
1884                 config_item_name(&alua_lu_gp_cg->cg_item),
1885                 lu_gp->lu_gp_id);
1886
1887         return count;
1888 }
1889
1890 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
1891
1892 /*
1893  * members
1894  */
1895 static ssize_t target_core_alua_lu_gp_show_attr_members(
1896         struct t10_alua_lu_gp *lu_gp,
1897         char *page)
1898 {
1899         struct se_device *dev;
1900         struct se_hba *hba;
1901         struct t10_alua_lu_gp_member *lu_gp_mem;
1902         ssize_t len = 0, cur_len;
1903         unsigned char buf[LU_GROUP_NAME_BUF];
1904
1905         memset(buf, 0, LU_GROUP_NAME_BUF);
1906
1907         spin_lock(&lu_gp->lu_gp_lock);
1908         list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
1909                 dev = lu_gp_mem->lu_gp_mem_dev;
1910                 hba = dev->se_hba;
1911
1912                 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
1913                         config_item_name(&hba->hba_group.cg_item),
1914                         config_item_name(&dev->dev_group.cg_item));
1915                 cur_len++; /* Extra byte for NULL terminator */
1916
1917                 if ((cur_len + len) > PAGE_SIZE) {
1918                         pr_warn("Ran out of lu_gp_show_attr"
1919                                 "_members buffer\n");
1920                         break;
1921                 }
1922                 memcpy(page+len, buf, cur_len);
1923                 len += cur_len;
1924         }
1925         spin_unlock(&lu_gp->lu_gp_lock);
1926
1927         return len;
1928 }
1929
1930 SE_DEV_ALUA_LU_ATTR_RO(members);
1931
1932 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
1933
1934 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
1935         &target_core_alua_lu_gp_lu_gp_id.attr,
1936         &target_core_alua_lu_gp_members.attr,
1937         NULL,
1938 };
1939
1940 static void target_core_alua_lu_gp_release(struct config_item *item)
1941 {
1942         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1943                         struct t10_alua_lu_gp, lu_gp_group);
1944
1945         core_alua_free_lu_gp(lu_gp);
1946 }
1947
1948 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
1949         .release                = target_core_alua_lu_gp_release,
1950         .show_attribute         = target_core_alua_lu_gp_attr_show,
1951         .store_attribute        = target_core_alua_lu_gp_attr_store,
1952 };
1953
1954 static struct config_item_type target_core_alua_lu_gp_cit = {
1955         .ct_item_ops            = &target_core_alua_lu_gp_ops,
1956         .ct_attrs               = target_core_alua_lu_gp_attrs,
1957         .ct_owner               = THIS_MODULE,
1958 };
1959
1960 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
1961
1962 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
1963
1964 static struct config_group *target_core_alua_create_lu_gp(
1965         struct config_group *group,
1966         const char *name)
1967 {
1968         struct t10_alua_lu_gp *lu_gp;
1969         struct config_group *alua_lu_gp_cg = NULL;
1970         struct config_item *alua_lu_gp_ci = NULL;
1971
1972         lu_gp = core_alua_allocate_lu_gp(name, 0);
1973         if (IS_ERR(lu_gp))
1974                 return NULL;
1975
1976         alua_lu_gp_cg = &lu_gp->lu_gp_group;
1977         alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
1978
1979         config_group_init_type_name(alua_lu_gp_cg, name,
1980                         &target_core_alua_lu_gp_cit);
1981
1982         pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
1983                 " Group: core/alua/lu_gps/%s\n",
1984                 config_item_name(alua_lu_gp_ci));
1985
1986         return alua_lu_gp_cg;
1987
1988 }
1989
1990 static void target_core_alua_drop_lu_gp(
1991         struct config_group *group,
1992         struct config_item *item)
1993 {
1994         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1995                         struct t10_alua_lu_gp, lu_gp_group);
1996
1997         pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
1998                 " Group: core/alua/lu_gps/%s, ID: %hu\n",
1999                 config_item_name(item), lu_gp->lu_gp_id);
2000         /*
2001          * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2002          * -> target_core_alua_lu_gp_release()
2003          */
2004         config_item_put(item);
2005 }
2006
2007 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2008         .make_group             = &target_core_alua_create_lu_gp,
2009         .drop_item              = &target_core_alua_drop_lu_gp,
2010 };
2011
2012 static struct config_item_type target_core_alua_lu_gps_cit = {
2013         .ct_item_ops            = NULL,
2014         .ct_group_ops           = &target_core_alua_lu_gps_group_ops,
2015         .ct_owner               = THIS_MODULE,
2016 };
2017
2018 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2019
2020 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2021
2022 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2023 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode)                            \
2024 static struct target_core_alua_tg_pt_gp_attribute                       \
2025                         target_core_alua_tg_pt_gp_##_name =             \
2026         __CONFIGFS_EATTR(_name, _mode,                                  \
2027         target_core_alua_tg_pt_gp_show_attr_##_name,                    \
2028         target_core_alua_tg_pt_gp_store_attr_##_name);
2029
2030 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name)                                \
2031 static struct target_core_alua_tg_pt_gp_attribute                       \
2032                         target_core_alua_tg_pt_gp_##_name =             \
2033         __CONFIGFS_EATTR_RO(_name,                                      \
2034         target_core_alua_tg_pt_gp_show_attr_##_name);
2035
2036 /*
2037  * alua_access_state
2038  */
2039 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2040         struct t10_alua_tg_pt_gp *tg_pt_gp,
2041         char *page)
2042 {
2043         return sprintf(page, "%d\n",
2044                 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2045 }
2046
2047 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2048         struct t10_alua_tg_pt_gp *tg_pt_gp,
2049         const char *page,
2050         size_t count)
2051 {
2052         struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2053         unsigned long tmp;
2054         int new_state, ret;
2055
2056         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2057                 pr_err("Unable to do implicit ALUA on non valid"
2058                         " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2059                 return -EINVAL;
2060         }
2061         if (!(dev->dev_flags & DF_CONFIGURED)) {
2062                 pr_err("Unable to set alua_access_state while device is"
2063                        " not configured\n");
2064                 return -ENODEV;
2065         }
2066
2067         ret = kstrtoul(page, 0, &tmp);
2068         if (ret < 0) {
2069                 pr_err("Unable to extract new ALUA access state from"
2070                                 " %s\n", page);
2071                 return ret;
2072         }
2073         new_state = (int)tmp;
2074
2075         if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2076                 pr_err("Unable to process implicit configfs ALUA"
2077                         " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2078                 return -EINVAL;
2079         }
2080         if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2081             new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2082                 /* LBA DEPENDENT is only allowed with implicit ALUA */
2083                 pr_err("Unable to process implicit configfs ALUA transition"
2084                        " while explicit ALUA management is enabled\n");
2085                 return -EINVAL;
2086         }
2087
2088         ret = core_alua_do_port_transition(tg_pt_gp, dev,
2089                                         NULL, NULL, new_state, 0);
2090         return (!ret) ? count : -EINVAL;
2091 }
2092
2093 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2094
2095 /*
2096  * alua_access_status
2097  */
2098 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2099         struct t10_alua_tg_pt_gp *tg_pt_gp,
2100         char *page)
2101 {
2102         return sprintf(page, "%s\n",
2103                 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2104 }
2105
2106 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2107         struct t10_alua_tg_pt_gp *tg_pt_gp,
2108         const char *page,
2109         size_t count)
2110 {
2111         unsigned long tmp;
2112         int new_status, ret;
2113
2114         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2115                 pr_err("Unable to do set ALUA access status on non"
2116                         " valid tg_pt_gp ID: %hu\n",
2117                         tg_pt_gp->tg_pt_gp_valid_id);
2118                 return -EINVAL;
2119         }
2120
2121         ret = kstrtoul(page, 0, &tmp);
2122         if (ret < 0) {
2123                 pr_err("Unable to extract new ALUA access status"
2124                                 " from %s\n", page);
2125                 return ret;
2126         }
2127         new_status = (int)tmp;
2128
2129         if ((new_status != ALUA_STATUS_NONE) &&
2130             (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2131             (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2132                 pr_err("Illegal ALUA access status: 0x%02x\n",
2133                                 new_status);
2134                 return -EINVAL;
2135         }
2136
2137         tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2138         return count;
2139 }
2140
2141 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2142
2143 /*
2144  * alua_access_type
2145  */
2146 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2147         struct t10_alua_tg_pt_gp *tg_pt_gp,
2148         char *page)
2149 {
2150         return core_alua_show_access_type(tg_pt_gp, page);
2151 }
2152
2153 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2154         struct t10_alua_tg_pt_gp *tg_pt_gp,
2155         const char *page,
2156         size_t count)
2157 {
2158         return core_alua_store_access_type(tg_pt_gp, page, count);
2159 }
2160
2161 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2162
2163 /*
2164  * alua_supported_states
2165  */
2166
2167 #define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit)               \
2168 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \
2169         struct t10_alua_tg_pt_gp *t, char *p)                           \
2170 {                                                                       \
2171         return sprintf(p, "%d\n", !!(t->_var & _bit));                  \
2172 }
2173
2174 #define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit)              \
2175 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\
2176         struct t10_alua_tg_pt_gp *t, const char *p, size_t c)           \
2177 {                                                                       \
2178         unsigned long tmp;                                              \
2179         int ret;                                                        \
2180                                                                         \
2181         if (!t->tg_pt_gp_valid_id) {                                    \
2182                 pr_err("Unable to do set ##_name ALUA state on non"     \
2183                        " valid tg_pt_gp ID: %hu\n",                     \
2184                        t->tg_pt_gp_valid_id);                           \
2185                 return -EINVAL;                                         \
2186         }                                                               \
2187                                                                         \
2188         ret = kstrtoul(p, 0, &tmp);                                     \
2189         if (ret < 0) {                                                  \
2190                 pr_err("Invalid value '%s', must be '0' or '1'\n", p);  \
2191                 return -EINVAL;                                         \
2192         }                                                               \
2193         if (tmp > 1) {                                                  \
2194                 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2195                 return -EINVAL;                                         \
2196         }                                                               \
2197         if (tmp)                                                        \
2198                 t->_var |= _bit;                                        \
2199         else                                                            \
2200                 t->_var &= ~_bit;                                       \
2201                                                                         \
2202         return c;                                                       \
2203 }
2204
2205 SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning,
2206                                tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2207 SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning,
2208                                 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2209 SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR);
2210
2211 SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline,
2212                                tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2213 SE_DEV_ALUA_SUPPORT_STATE_STORE(offline,
2214                                 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2215 SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR);
2216
2217 SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent,
2218                                tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2219 SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent,
2220                                 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2221 SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO);
2222
2223 SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable,
2224                                tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2225 SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable,
2226                                 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2227 SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR);
2228
2229 SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby,
2230                                tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2231 SE_DEV_ALUA_SUPPORT_STATE_STORE(standby,
2232                                 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2233 SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR);
2234
2235 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized,
2236                                tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2237 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized,
2238                                 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2239 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR);
2240
2241 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized,
2242                                tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2243 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized,
2244                                 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2245 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR);
2246
2247 /*
2248  * alua_write_metadata
2249  */
2250 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2251         struct t10_alua_tg_pt_gp *tg_pt_gp,
2252         char *page)
2253 {
2254         return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2255 }
2256
2257 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2258         struct t10_alua_tg_pt_gp *tg_pt_gp,
2259         const char *page,
2260         size_t count)
2261 {
2262         unsigned long tmp;
2263         int ret;
2264
2265         ret = kstrtoul(page, 0, &tmp);
2266         if (ret < 0) {
2267                 pr_err("Unable to extract alua_write_metadata\n");
2268                 return ret;
2269         }
2270
2271         if ((tmp != 0) && (tmp != 1)) {
2272                 pr_err("Illegal value for alua_write_metadata:"
2273                         " %lu\n", tmp);
2274                 return -EINVAL;
2275         }
2276         tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2277
2278         return count;
2279 }
2280
2281 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2282
2283
2284
2285 /*
2286  * nonop_delay_msecs
2287  */
2288 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2289         struct t10_alua_tg_pt_gp *tg_pt_gp,
2290         char *page)
2291 {
2292         return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2293
2294 }
2295
2296 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2297         struct t10_alua_tg_pt_gp *tg_pt_gp,
2298         const char *page,
2299         size_t count)
2300 {
2301         return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2302 }
2303
2304 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2305
2306 /*
2307  * trans_delay_msecs
2308  */
2309 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2310         struct t10_alua_tg_pt_gp *tg_pt_gp,
2311         char *page)
2312 {
2313         return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2314 }
2315
2316 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2317         struct t10_alua_tg_pt_gp *tg_pt_gp,
2318         const char *page,
2319         size_t count)
2320 {
2321         return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2322 }
2323
2324 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2325
2326 /*
2327  * implicit_trans_secs
2328  */
2329 static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs(
2330         struct t10_alua_tg_pt_gp *tg_pt_gp,
2331         char *page)
2332 {
2333         return core_alua_show_implicit_trans_secs(tg_pt_gp, page);
2334 }
2335
2336 static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs(
2337         struct t10_alua_tg_pt_gp *tg_pt_gp,
2338         const char *page,
2339         size_t count)
2340 {
2341         return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count);
2342 }
2343
2344 SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR);
2345
2346 /*
2347  * preferred
2348  */
2349
2350 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2351         struct t10_alua_tg_pt_gp *tg_pt_gp,
2352         char *page)
2353 {
2354         return core_alua_show_preferred_bit(tg_pt_gp, page);
2355 }
2356
2357 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2358         struct t10_alua_tg_pt_gp *tg_pt_gp,
2359         const char *page,
2360         size_t count)
2361 {
2362         return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2363 }
2364
2365 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2366
2367 /*
2368  * tg_pt_gp_id
2369  */
2370 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2371         struct t10_alua_tg_pt_gp *tg_pt_gp,
2372         char *page)
2373 {
2374         if (!tg_pt_gp->tg_pt_gp_valid_id)
2375                 return 0;
2376
2377         return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2378 }
2379
2380 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2381         struct t10_alua_tg_pt_gp *tg_pt_gp,
2382         const char *page,
2383         size_t count)
2384 {
2385         struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2386         unsigned long tg_pt_gp_id;
2387         int ret;
2388
2389         ret = kstrtoul(page, 0, &tg_pt_gp_id);
2390         if (ret < 0) {
2391                 pr_err("kstrtoul() returned %d for"
2392                         " tg_pt_gp_id\n", ret);
2393                 return ret;
2394         }
2395         if (tg_pt_gp_id > 0x0000ffff) {
2396                 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2397                         " 0x0000ffff\n", tg_pt_gp_id);
2398                 return -EINVAL;
2399         }
2400
2401         ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2402         if (ret < 0)
2403                 return -EINVAL;
2404
2405         pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2406                 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2407                 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2408                 tg_pt_gp->tg_pt_gp_id);
2409
2410         return count;
2411 }
2412
2413 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2414
2415 /*
2416  * members
2417  */
2418 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2419         struct t10_alua_tg_pt_gp *tg_pt_gp,
2420         char *page)
2421 {
2422         struct se_port *port;
2423         struct se_portal_group *tpg;
2424         struct se_lun *lun;
2425         struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2426         ssize_t len = 0, cur_len;
2427         unsigned char buf[TG_PT_GROUP_NAME_BUF];
2428
2429         memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2430
2431         spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2432         list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2433                         tg_pt_gp_mem_list) {
2434                 port = tg_pt_gp_mem->tg_pt;
2435                 tpg = port->sep_tpg;
2436                 lun = port->sep_lun;
2437
2438                 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2439                         "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2440                         tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2441                         tpg->se_tpg_tfo->tpg_get_tag(tpg),
2442                         config_item_name(&lun->lun_group.cg_item));
2443                 cur_len++; /* Extra byte for NULL terminator */
2444
2445                 if ((cur_len + len) > PAGE_SIZE) {
2446                         pr_warn("Ran out of lu_gp_show_attr"
2447                                 "_members buffer\n");
2448                         break;
2449                 }
2450                 memcpy(page+len, buf, cur_len);
2451                 len += cur_len;
2452         }
2453         spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2454
2455         return len;
2456 }
2457
2458 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2459
2460 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2461                         tg_pt_gp_group);
2462
2463 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2464         &target_core_alua_tg_pt_gp_alua_access_state.attr,
2465         &target_core_alua_tg_pt_gp_alua_access_status.attr,
2466         &target_core_alua_tg_pt_gp_alua_access_type.attr,
2467         &target_core_alua_tg_pt_gp_alua_support_transitioning.attr,
2468         &target_core_alua_tg_pt_gp_alua_support_offline.attr,
2469         &target_core_alua_tg_pt_gp_alua_support_lba_dependent.attr,
2470         &target_core_alua_tg_pt_gp_alua_support_unavailable.attr,
2471         &target_core_alua_tg_pt_gp_alua_support_standby.attr,
2472         &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized.attr,
2473         &target_core_alua_tg_pt_gp_alua_support_active_optimized.attr,
2474         &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2475         &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2476         &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2477         &target_core_alua_tg_pt_gp_implicit_trans_secs.attr,
2478         &target_core_alua_tg_pt_gp_preferred.attr,
2479         &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2480         &target_core_alua_tg_pt_gp_members.attr,
2481         NULL,
2482 };
2483
2484 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2485 {
2486         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2487                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2488
2489         core_alua_free_tg_pt_gp(tg_pt_gp);
2490 }
2491
2492 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2493         .release                = target_core_alua_tg_pt_gp_release,
2494         .show_attribute         = target_core_alua_tg_pt_gp_attr_show,
2495         .store_attribute        = target_core_alua_tg_pt_gp_attr_store,
2496 };
2497
2498 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2499         .ct_item_ops            = &target_core_alua_tg_pt_gp_ops,
2500         .ct_attrs               = target_core_alua_tg_pt_gp_attrs,
2501         .ct_owner               = THIS_MODULE,
2502 };
2503
2504 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2505
2506 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2507
2508 static struct config_group *target_core_alua_create_tg_pt_gp(
2509         struct config_group *group,
2510         const char *name)
2511 {
2512         struct t10_alua *alua = container_of(group, struct t10_alua,
2513                                         alua_tg_pt_gps_group);
2514         struct t10_alua_tg_pt_gp *tg_pt_gp;
2515         struct config_group *alua_tg_pt_gp_cg = NULL;
2516         struct config_item *alua_tg_pt_gp_ci = NULL;
2517
2518         tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2519         if (!tg_pt_gp)
2520                 return NULL;
2521
2522         alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2523         alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2524
2525         config_group_init_type_name(alua_tg_pt_gp_cg, name,
2526                         &target_core_alua_tg_pt_gp_cit);
2527
2528         pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2529                 " Group: alua/tg_pt_gps/%s\n",
2530                 config_item_name(alua_tg_pt_gp_ci));
2531
2532         return alua_tg_pt_gp_cg;
2533 }
2534
2535 static void target_core_alua_drop_tg_pt_gp(
2536         struct config_group *group,
2537         struct config_item *item)
2538 {
2539         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2540                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2541
2542         pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2543                 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2544                 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2545         /*
2546          * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2547          * -> target_core_alua_tg_pt_gp_release().
2548          */
2549         config_item_put(item);
2550 }
2551
2552 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2553         .make_group             = &target_core_alua_create_tg_pt_gp,
2554         .drop_item              = &target_core_alua_drop_tg_pt_gp,
2555 };
2556
2557 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
2558
2559 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2560
2561 /* Start functions for struct config_item_type target_core_alua_cit */
2562
2563 /*
2564  * target_core_alua_cit is a ConfigFS group that lives under
2565  * /sys/kernel/config/target/core/alua.  There are default groups
2566  * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2567  * target_core_alua_cit in target_core_init_configfs() below.
2568  */
2569 static struct config_item_type target_core_alua_cit = {
2570         .ct_item_ops            = NULL,
2571         .ct_attrs               = NULL,
2572         .ct_owner               = THIS_MODULE,
2573 };
2574
2575 /* End functions for struct config_item_type target_core_alua_cit */
2576
2577 /* Start functions for struct config_item_type tb_dev_stat_cit */
2578
2579 static struct config_group *target_core_stat_mkdir(
2580         struct config_group *group,
2581         const char *name)
2582 {
2583         return ERR_PTR(-ENOSYS);
2584 }
2585
2586 static void target_core_stat_rmdir(
2587         struct config_group *group,
2588         struct config_item *item)
2589 {
2590         return;
2591 }
2592
2593 static struct configfs_group_operations target_core_stat_group_ops = {
2594         .make_group             = &target_core_stat_mkdir,
2595         .drop_item              = &target_core_stat_rmdir,
2596 };
2597
2598 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
2599
2600 /* End functions for struct config_item_type tb_dev_stat_cit */
2601
2602 /* Start functions for struct config_item_type target_core_hba_cit */
2603
2604 static struct config_group *target_core_make_subdev(
2605         struct config_group *group,
2606         const char *name)
2607 {
2608         struct t10_alua_tg_pt_gp *tg_pt_gp;
2609         struct se_subsystem_api *t;
2610         struct config_item *hba_ci = &group->cg_item;
2611         struct se_hba *hba = item_to_hba(hba_ci);
2612         struct se_device *dev;
2613         struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2614         struct config_group *dev_stat_grp = NULL;
2615         int errno = -ENOMEM, ret;
2616
2617         ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2618         if (ret)
2619                 return ERR_PTR(ret);
2620         /*
2621          * Locate the struct se_subsystem_api from parent's struct se_hba.
2622          */
2623         t = hba->transport;
2624
2625         dev = target_alloc_device(hba, name);
2626         if (!dev)
2627                 goto out_unlock;
2628
2629         dev_cg = &dev->dev_group;
2630
2631         dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
2632                         GFP_KERNEL);
2633         if (!dev_cg->default_groups)
2634                 goto out_free_device;
2635
2636         config_group_init_type_name(dev_cg, name, &t->tb_cits.tb_dev_cit);
2637         config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2638                         &t->tb_cits.tb_dev_attrib_cit);
2639         config_group_init_type_name(&dev->dev_pr_group, "pr",
2640                         &t->tb_cits.tb_dev_pr_cit);
2641         config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2642                         &t->tb_cits.tb_dev_wwn_cit);
2643         config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2644                         "alua", &t->tb_cits.tb_dev_alua_tg_pt_gps_cit);
2645         config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2646                         "statistics", &t->tb_cits.tb_dev_stat_cit);
2647
2648         dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
2649         dev_cg->default_groups[1] = &dev->dev_pr_group;
2650         dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
2651         dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
2652         dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
2653         dev_cg->default_groups[5] = NULL;
2654         /*
2655          * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2656          */
2657         tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2658         if (!tg_pt_gp)
2659                 goto out_free_dev_cg_default_groups;
2660         dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2661
2662         tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2663         tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2664                                 GFP_KERNEL);
2665         if (!tg_pt_gp_cg->default_groups) {
2666                 pr_err("Unable to allocate tg_pt_gp_cg->"
2667                                 "default_groups\n");
2668                 goto out_free_tg_pt_gp;
2669         }
2670
2671         config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2672                         "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2673         tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2674         tg_pt_gp_cg->default_groups[1] = NULL;
2675         /*
2676          * Add core/$HBA/$DEV/statistics/ default groups
2677          */
2678         dev_stat_grp = &dev->dev_stat_grps.stat_group;
2679         dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
2680                                 GFP_KERNEL);
2681         if (!dev_stat_grp->default_groups) {
2682                 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2683                 goto out_free_tg_pt_gp_cg_default_groups;
2684         }
2685         target_stat_setup_dev_default_groups(dev);
2686
2687         mutex_unlock(&hba->hba_access_mutex);
2688         return dev_cg;
2689
2690 out_free_tg_pt_gp_cg_default_groups:
2691         kfree(tg_pt_gp_cg->default_groups);
2692 out_free_tg_pt_gp:
2693         core_alua_free_tg_pt_gp(tg_pt_gp);
2694 out_free_dev_cg_default_groups:
2695         kfree(dev_cg->default_groups);
2696 out_free_device:
2697         target_free_device(dev);
2698 out_unlock:
2699         mutex_unlock(&hba->hba_access_mutex);
2700         return ERR_PTR(errno);
2701 }
2702
2703 static void target_core_drop_subdev(
2704         struct config_group *group,
2705         struct config_item *item)
2706 {
2707         struct config_group *dev_cg = to_config_group(item);
2708         struct se_device *dev =
2709                 container_of(dev_cg, struct se_device, dev_group);
2710         struct se_hba *hba;
2711         struct config_item *df_item;
2712         struct config_group *tg_pt_gp_cg, *dev_stat_grp;
2713         int i;
2714
2715         hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
2716
2717         mutex_lock(&hba->hba_access_mutex);
2718
2719         dev_stat_grp = &dev->dev_stat_grps.stat_group;
2720         for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2721                 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2722                 dev_stat_grp->default_groups[i] = NULL;
2723                 config_item_put(df_item);
2724         }
2725         kfree(dev_stat_grp->default_groups);
2726
2727         tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2728         for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2729                 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2730                 tg_pt_gp_cg->default_groups[i] = NULL;
2731                 config_item_put(df_item);
2732         }
2733         kfree(tg_pt_gp_cg->default_groups);
2734         /*
2735          * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2736          * directly from target_core_alua_tg_pt_gp_release().
2737          */
2738         dev->t10_alua.default_tg_pt_gp = NULL;
2739
2740         for (i = 0; dev_cg->default_groups[i]; i++) {
2741                 df_item = &dev_cg->default_groups[i]->cg_item;
2742                 dev_cg->default_groups[i] = NULL;
2743                 config_item_put(df_item);
2744         }
2745         /*
2746          * se_dev is released from target_core_dev_item_ops->release()
2747          */
2748         config_item_put(item);
2749         mutex_unlock(&hba->hba_access_mutex);
2750 }
2751
2752 static struct configfs_group_operations target_core_hba_group_ops = {
2753         .make_group             = target_core_make_subdev,
2754         .drop_item              = target_core_drop_subdev,
2755 };
2756
2757 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2758 #define SE_HBA_ATTR(_name, _mode)                               \
2759 static struct target_core_hba_attribute                         \
2760                 target_core_hba_##_name =                       \
2761                 __CONFIGFS_EATTR(_name, _mode,                  \
2762                 target_core_hba_show_attr_##_name,              \
2763                 target_core_hba_store_attr_##_name);
2764
2765 #define SE_HBA_ATTR_RO(_name)                                   \
2766 static struct target_core_hba_attribute                         \
2767                 target_core_hba_##_name =                       \
2768                 __CONFIGFS_EATTR_RO(_name,                      \
2769                 target_core_hba_show_attr_##_name);
2770
2771 static ssize_t target_core_hba_show_attr_hba_info(
2772         struct se_hba *hba,
2773         char *page)
2774 {
2775         return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2776                         hba->hba_id, hba->transport->name,
2777                         TARGET_CORE_CONFIGFS_VERSION);
2778 }
2779
2780 SE_HBA_ATTR_RO(hba_info);
2781
2782 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2783                                 char *page)
2784 {
2785         int hba_mode = 0;
2786
2787         if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2788                 hba_mode = 1;
2789
2790         return sprintf(page, "%d\n", hba_mode);
2791 }
2792
2793 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2794                                 const char *page, size_t count)
2795 {
2796         struct se_subsystem_api *transport = hba->transport;
2797         unsigned long mode_flag;
2798         int ret;
2799
2800         if (transport->pmode_enable_hba == NULL)
2801                 return -EINVAL;
2802
2803         ret = kstrtoul(page, 0, &mode_flag);
2804         if (ret < 0) {
2805                 pr_err("Unable to extract hba mode flag: %d\n", ret);
2806                 return ret;
2807         }
2808
2809         if (hba->dev_count) {
2810                 pr_err("Unable to set hba_mode with active devices\n");
2811                 return -EINVAL;
2812         }
2813
2814         ret = transport->pmode_enable_hba(hba, mode_flag);
2815         if (ret < 0)
2816                 return -EINVAL;
2817         if (ret > 0)
2818                 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2819         else if (ret == 0)
2820                 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2821
2822         return count;
2823 }
2824
2825 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2826
2827 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2828
2829 static void target_core_hba_release(struct config_item *item)
2830 {
2831         struct se_hba *hba = container_of(to_config_group(item),
2832                                 struct se_hba, hba_group);
2833         core_delete_hba(hba);
2834 }
2835
2836 static struct configfs_attribute *target_core_hba_attrs[] = {
2837         &target_core_hba_hba_info.attr,
2838         &target_core_hba_hba_mode.attr,
2839         NULL,
2840 };
2841
2842 static struct configfs_item_operations target_core_hba_item_ops = {
2843         .release                = target_core_hba_release,
2844         .show_attribute         = target_core_hba_attr_show,
2845         .store_attribute        = target_core_hba_attr_store,
2846 };
2847
2848 static struct config_item_type target_core_hba_cit = {
2849         .ct_item_ops            = &target_core_hba_item_ops,
2850         .ct_group_ops           = &target_core_hba_group_ops,
2851         .ct_attrs               = target_core_hba_attrs,
2852         .ct_owner               = THIS_MODULE,
2853 };
2854
2855 static struct config_group *target_core_call_addhbatotarget(
2856         struct config_group *group,
2857         const char *name)
2858 {
2859         char *se_plugin_str, *str, *str2;
2860         struct se_hba *hba;
2861         char buf[TARGET_CORE_NAME_MAX_LEN];
2862         unsigned long plugin_dep_id = 0;
2863         int ret;
2864
2865         memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
2866         if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
2867                 pr_err("Passed *name strlen(): %d exceeds"
2868                         " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
2869                         TARGET_CORE_NAME_MAX_LEN);
2870                 return ERR_PTR(-ENAMETOOLONG);
2871         }
2872         snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
2873
2874         str = strstr(buf, "_");
2875         if (!str) {
2876                 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
2877                 return ERR_PTR(-EINVAL);
2878         }
2879         se_plugin_str = buf;
2880         /*
2881          * Special case for subsystem plugins that have "_" in their names.
2882          * Namely rd_direct and rd_mcp..
2883          */
2884         str2 = strstr(str+1, "_");
2885         if (str2) {
2886                 *str2 = '\0'; /* Terminate for *se_plugin_str */
2887                 str2++; /* Skip to start of plugin dependent ID */
2888                 str = str2;
2889         } else {
2890                 *str = '\0'; /* Terminate for *se_plugin_str */
2891                 str++; /* Skip to start of plugin dependent ID */
2892         }
2893
2894         ret = kstrtoul(str, 0, &plugin_dep_id);
2895         if (ret < 0) {
2896                 pr_err("kstrtoul() returned %d for"
2897                                 " plugin_dep_id\n", ret);
2898                 return ERR_PTR(ret);
2899         }
2900         /*
2901          * Load up TCM subsystem plugins if they have not already been loaded.
2902          */
2903         transport_subsystem_check_init();
2904
2905         hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
2906         if (IS_ERR(hba))
2907                 return ERR_CAST(hba);
2908
2909         config_group_init_type_name(&hba->hba_group, name,
2910                         &target_core_hba_cit);
2911
2912         return &hba->hba_group;
2913 }
2914
2915 static void target_core_call_delhbafromtarget(
2916         struct config_group *group,
2917         struct config_item *item)
2918 {
2919         /*
2920          * core_delete_hba() is called from target_core_hba_item_ops->release()
2921          * -> target_core_hba_release()
2922          */
2923         config_item_put(item);
2924 }
2925
2926 static struct configfs_group_operations target_core_group_ops = {
2927         .make_group     = target_core_call_addhbatotarget,
2928         .drop_item      = target_core_call_delhbafromtarget,
2929 };
2930
2931 static struct config_item_type target_core_cit = {
2932         .ct_item_ops    = NULL,
2933         .ct_group_ops   = &target_core_group_ops,
2934         .ct_attrs       = NULL,
2935         .ct_owner       = THIS_MODULE,
2936 };
2937
2938 /* Stop functions for struct config_item_type target_core_hba_cit */
2939
2940 void target_core_setup_sub_cits(struct se_subsystem_api *sa)
2941 {
2942         target_core_setup_dev_cit(sa);
2943         target_core_setup_dev_attrib_cit(sa);
2944         target_core_setup_dev_pr_cit(sa);
2945         target_core_setup_dev_wwn_cit(sa);
2946         target_core_setup_dev_alua_tg_pt_gps_cit(sa);
2947         target_core_setup_dev_stat_cit(sa);
2948 }
2949 EXPORT_SYMBOL(target_core_setup_sub_cits);
2950
2951 static int __init target_core_init_configfs(void)
2952 {
2953         struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
2954         struct config_group *lu_gp_cg = NULL;
2955         struct configfs_subsystem *subsys;
2956         struct t10_alua_lu_gp *lu_gp;
2957         int ret;
2958
2959         pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
2960                 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
2961                 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
2962
2963         subsys = target_core_subsystem[0];
2964         config_group_init(&subsys->su_group);
2965         mutex_init(&subsys->su_mutex);
2966
2967         ret = init_se_kmem_caches();
2968         if (ret < 0)
2969                 return ret;
2970         /*
2971          * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
2972          * and ALUA Logical Unit Group and Target Port Group infrastructure.
2973          */
2974         target_cg = &subsys->su_group;
2975         target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2976                                 GFP_KERNEL);
2977         if (!target_cg->default_groups) {
2978                 pr_err("Unable to allocate target_cg->default_groups\n");
2979                 ret = -ENOMEM;
2980                 goto out_global;
2981         }
2982
2983         config_group_init_type_name(&target_core_hbagroup,
2984                         "core", &target_core_cit);
2985         target_cg->default_groups[0] = &target_core_hbagroup;
2986         target_cg->default_groups[1] = NULL;
2987         /*
2988          * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
2989          */
2990         hba_cg = &target_core_hbagroup;
2991         hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2992                                 GFP_KERNEL);
2993         if (!hba_cg->default_groups) {
2994                 pr_err("Unable to allocate hba_cg->default_groups\n");
2995                 ret = -ENOMEM;
2996                 goto out_global;
2997         }
2998         config_group_init_type_name(&alua_group,
2999                         "alua", &target_core_alua_cit);
3000         hba_cg->default_groups[0] = &alua_group;
3001         hba_cg->default_groups[1] = NULL;
3002         /*
3003          * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3004          * groups under /sys/kernel/config/target/core/alua/
3005          */
3006         alua_cg = &alua_group;
3007         alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3008                         GFP_KERNEL);
3009         if (!alua_cg->default_groups) {
3010                 pr_err("Unable to allocate alua_cg->default_groups\n");
3011                 ret = -ENOMEM;
3012                 goto out_global;
3013         }
3014
3015         config_group_init_type_name(&alua_lu_gps_group,
3016                         "lu_gps", &target_core_alua_lu_gps_cit);
3017         alua_cg->default_groups[0] = &alua_lu_gps_group;
3018         alua_cg->default_groups[1] = NULL;
3019         /*
3020          * Add core/alua/lu_gps/default_lu_gp
3021          */
3022         lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3023         if (IS_ERR(lu_gp)) {
3024                 ret = -ENOMEM;
3025                 goto out_global;
3026         }
3027
3028         lu_gp_cg = &alua_lu_gps_group;
3029         lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3030                         GFP_KERNEL);
3031         if (!lu_gp_cg->default_groups) {
3032                 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3033                 ret = -ENOMEM;
3034                 goto out_global;
3035         }
3036
3037         config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3038                                 &target_core_alua_lu_gp_cit);
3039         lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3040         lu_gp_cg->default_groups[1] = NULL;
3041         default_lu_gp = lu_gp;
3042         /*
3043          * Register the target_core_mod subsystem with configfs.
3044          */
3045         ret = configfs_register_subsystem(subsys);
3046         if (ret < 0) {
3047                 pr_err("Error %d while registering subsystem %s\n",
3048                         ret, subsys->su_group.cg_item.ci_namebuf);
3049                 goto out_global;
3050         }
3051         pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3052                 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3053                 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3054         /*
3055          * Register built-in RAMDISK subsystem logic for virtual LUN 0
3056          */
3057         ret = rd_module_init();
3058         if (ret < 0)
3059                 goto out;
3060
3061         ret = core_dev_setup_virtual_lun0();
3062         if (ret < 0)
3063                 goto out;
3064
3065         ret = target_xcopy_setup_pt();
3066         if (ret < 0)
3067                 goto out;
3068
3069         return 0;
3070
3071 out:
3072         configfs_unregister_subsystem(subsys);
3073         core_dev_release_virtual_lun0();
3074         rd_module_exit();
3075 out_global:
3076         if (default_lu_gp) {
3077                 core_alua_free_lu_gp(default_lu_gp);
3078                 default_lu_gp = NULL;
3079         }
3080         if (lu_gp_cg)
3081                 kfree(lu_gp_cg->default_groups);
3082         if (alua_cg)
3083                 kfree(alua_cg->default_groups);
3084         if (hba_cg)
3085                 kfree(hba_cg->default_groups);
3086         kfree(target_cg->default_groups);
3087         release_se_kmem_caches();
3088         return ret;
3089 }
3090
3091 static void __exit target_core_exit_configfs(void)
3092 {
3093         struct configfs_subsystem *subsys;
3094         struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3095         struct config_item *item;
3096         int i;
3097
3098         subsys = target_core_subsystem[0];
3099
3100         lu_gp_cg = &alua_lu_gps_group;
3101         for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3102                 item = &lu_gp_cg->default_groups[i]->cg_item;
3103                 lu_gp_cg->default_groups[i] = NULL;
3104                 config_item_put(item);
3105         }
3106         kfree(lu_gp_cg->default_groups);
3107         lu_gp_cg->default_groups = NULL;
3108
3109         alua_cg = &alua_group;
3110         for (i = 0; alua_cg->default_groups[i]; i++) {
3111                 item = &alua_cg->default_groups[i]->cg_item;
3112                 alua_cg->default_groups[i] = NULL;
3113                 config_item_put(item);
3114         }
3115         kfree(alua_cg->default_groups);
3116         alua_cg->default_groups = NULL;
3117
3118         hba_cg = &target_core_hbagroup;
3119         for (i = 0; hba_cg->default_groups[i]; i++) {
3120                 item = &hba_cg->default_groups[i]->cg_item;
3121                 hba_cg->default_groups[i] = NULL;
3122                 config_item_put(item);
3123         }
3124         kfree(hba_cg->default_groups);
3125         hba_cg->default_groups = NULL;
3126         /*
3127          * We expect subsys->su_group.default_groups to be released
3128          * by configfs subsystem provider logic..
3129          */
3130         configfs_unregister_subsystem(subsys);
3131         kfree(subsys->su_group.default_groups);
3132
3133         core_alua_free_lu_gp(default_lu_gp);
3134         default_lu_gp = NULL;
3135
3136         pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3137                         " Infrastructure\n");
3138
3139         core_dev_release_virtual_lun0();
3140         rd_module_exit();
3141         target_xcopy_release_pt();
3142         release_se_kmem_caches();
3143 }
3144
3145 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3146 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3147 MODULE_LICENSE("GPL");
3148
3149 module_init(target_core_init_configfs);
3150 module_exit(target_core_exit_configfs);