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