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_model_alias);
 613 SE_DEV_ATTR(emulate_model_alias, S_IRUGO | S_IWUSR);
 614
 615 DEF_DEV_ATTRIB(emulate_dpo);
 616 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
 617
 618 DEF_DEV_ATTRIB(emulate_fua_write);
 619 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
 620
 621 DEF_DEV_ATTRIB(emulate_fua_read);
 622 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
 623
 624 DEF_DEV_ATTRIB(emulate_write_cache);
 625 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
 626
 627 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
 628 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
 629
 630 DEF_DEV_ATTRIB(emulate_tas);
 631 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
 632
 633 DEF_DEV_ATTRIB(emulate_tpu);
 634 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
 635
 636 DEF_DEV_ATTRIB(emulate_tpws);
 637 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
 638
 639 DEF_DEV_ATTRIB(enforce_pr_isids);
 640 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
 641
 642 DEF_DEV_ATTRIB(is_nonrot);
 643 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
 644
 645 DEF_DEV_ATTRIB(emulate_rest_reord);
 646 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
 647
 648 DEF_DEV_ATTRIB_RO(hw_block_size);
 649 SE_DEV_ATTR_RO(hw_block_size);
 650
 651 DEF_DEV_ATTRIB(block_size);
 652 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
 653
 654 DEF_DEV_ATTRIB_RO(hw_max_sectors);
 655 SE_DEV_ATTR_RO(hw_max_sectors);
 656
 657 DEF_DEV_ATTRIB(fabric_max_sectors);
 658 SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR);
 659
 660 DEF_DEV_ATTRIB(optimal_sectors);
 661 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
 662
 663 DEF_DEV_ATTRIB_RO(hw_queue_depth);
 664 SE_DEV_ATTR_RO(hw_queue_depth);
 665
 666 DEF_DEV_ATTRIB(queue_depth);
 667 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
 668
 669 DEF_DEV_ATTRIB(max_unmap_lba_count);
 670 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
 671
 672 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
 673 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
 674
 675 DEF_DEV_ATTRIB(unmap_granularity);
 676 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
 677
 678 DEF_DEV_ATTRIB(unmap_granularity_alignment);
 679 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
 680
 681 DEF_DEV_ATTRIB(max_write_same_len);
 682 SE_DEV_ATTR(max_write_same_len, S_IRUGO | S_IWUSR);
 683
 684 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
 685
 686 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
 687         &target_core_dev_attrib_emulate_model_alias.attr,
 688         &target_core_dev_attrib_emulate_dpo.attr,
 689         &target_core_dev_attrib_emulate_fua_write.attr,
 690         &target_core_dev_attrib_emulate_fua_read.attr,
 691         &target_core_dev_attrib_emulate_write_cache.attr,
 692         &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
 693         &target_core_dev_attrib_emulate_tas.attr,
 694         &target_core_dev_attrib_emulate_tpu.attr,
 695         &target_core_dev_attrib_emulate_tpws.attr,
 696         &target_core_dev_attrib_enforce_pr_isids.attr,
 697         &target_core_dev_attrib_is_nonrot.attr,
 698         &target_core_dev_attrib_emulate_rest_reord.attr,
 699         &target_core_dev_attrib_hw_block_size.attr,
 700         &target_core_dev_attrib_block_size.attr,
 701         &target_core_dev_attrib_hw_max_sectors.attr,
 702         &target_core_dev_attrib_fabric_max_sectors.attr,
 703         &target_core_dev_attrib_optimal_sectors.attr,
 704         &target_core_dev_attrib_hw_queue_depth.attr,
 705         &target_core_dev_attrib_queue_depth.attr,
 706         &target_core_dev_attrib_max_unmap_lba_count.attr,
 707         &target_core_dev_attrib_max_unmap_block_desc_count.attr,
 708         &target_core_dev_attrib_unmap_granularity.attr,
 709         &target_core_dev_attrib_unmap_granularity_alignment.attr,
 710         &target_core_dev_attrib_max_write_same_len.attr,
 711         NULL,
 712 };
 713
 714 static struct configfs_item_operations target_core_dev_attrib_ops = {
 715         .show_attribute         = target_core_dev_attrib_attr_show,
 716         .store_attribute        = target_core_dev_attrib_attr_store,
 717 };
 718
 719 static struct config_item_type target_core_dev_attrib_cit = {
 720         .ct_item_ops            = &target_core_dev_attrib_ops,
 721         .ct_attrs               = target_core_dev_attrib_attrs,
 722         .ct_owner               = THIS_MODULE,
 723 };
 724
 725 /* End functions for struct config_item_type target_core_dev_attrib_cit */
 726
 727 /*  Start functions for struct config_item_type target_core_dev_wwn_cit */
 728
 729 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
 730 #define SE_DEV_WWN_ATTR(_name, _mode)                                   \
 731 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
 732                 __CONFIGFS_EATTR(_name, _mode,                          \
 733                 target_core_dev_wwn_show_attr_##_name,                  \
 734                 target_core_dev_wwn_store_attr_##_name);
 735
 736 #define SE_DEV_WWN_ATTR_RO(_name);                                      \
 737 do {                                                                    \
 738         static struct target_core_dev_wwn_attribute                     \
 739                         target_core_dev_wwn_##_name =                   \
 740                 __CONFIGFS_EATTR_RO(_name,                              \
 741                 target_core_dev_wwn_show_attr_##_name);                 \
 742 } while (0);
 743
 744 /*
 745  * VPD page 0x80 Unit serial
 746  */
 747 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
 748         struct t10_wwn *t10_wwn,
 749         char *page)
 750 {
 751         return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
 752                 &t10_wwn->unit_serial[0]);
 753 }
 754
 755 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
 756         struct t10_wwn *t10_wwn,
 757         const char *page,
 758         size_t count)
 759 {
 760         struct se_device *dev = t10_wwn->t10_dev;
 761         unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
 762
 763         /*
 764          * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
 765          * from the struct scsi_device level firmware, do not allow
 766          * VPD Unit Serial to be emulated.
 767          *
 768          * Note this struct scsi_device could also be emulating VPD
 769          * information from its drivers/scsi LLD.  But for now we assume
 770          * it is doing 'the right thing' wrt a world wide unique
 771          * VPD Unit Serial Number that OS dependent multipath can depend on.
 772          */
 773         if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
 774                 pr_err("Underlying SCSI device firmware provided VPD"
 775                         " Unit Serial, ignoring request\n");
 776                 return -EOPNOTSUPP;
 777         }
 778
 779         if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
 780                 pr_err("Emulated VPD Unit Serial exceeds"
 781                 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
 782                 return -EOVERFLOW;
 783         }
 784         /*
 785          * Check to see if any active $FABRIC_MOD exports exist.  If they
 786          * do exist, fail here as changing this information on the fly
 787          * (underneath the initiator side OS dependent multipath code)
 788          * could cause negative effects.
 789          */
 790         if (dev->export_count) {
 791                 pr_err("Unable to set VPD Unit Serial while"
 792                         " active %d $FABRIC_MOD exports exist\n",
 793                         dev->export_count);
 794                 return -EINVAL;
 795         }
 796
 797         /*
 798          * This currently assumes ASCII encoding for emulated VPD Unit Serial.
 799          *
 800          * Also, strip any newline added from the userspace
 801          * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
 802          */
 803         memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
 804         snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
 805         snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
 806                         "%s", strstrip(buf));
 807         dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
 808
 809         pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
 810                         " %s\n", dev->t10_wwn.unit_serial);
 811
 812         return count;
 813 }
 814
 815 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
 816
 817 /*
 818  * VPD page 0x83 Protocol Identifier
 819  */
 820 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
 821         struct t10_wwn *t10_wwn,
 822         char *page)
 823 {
 824         struct t10_vpd *vpd;
 825         unsigned char buf[VPD_TMP_BUF_SIZE];
 826         ssize_t len = 0;
 827
 828         memset(buf, 0, VPD_TMP_BUF_SIZE);
 829
 830         spin_lock(&t10_wwn->t10_vpd_lock);
 831         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
 832                 if (!vpd->protocol_identifier_set)
 833                         continue;
 834
 835                 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
 836
 837                 if (len + strlen(buf) >= PAGE_SIZE)
 838                         break;
 839
 840                 len += sprintf(page+len, "%s", buf);
 841         }
 842         spin_unlock(&t10_wwn->t10_vpd_lock);
 843
 844         return len;
 845 }
 846
 847 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
 848         struct t10_wwn *t10_wwn,
 849         const char *page,
 850         size_t count)
 851 {
 852         return -ENOSYS;
 853 }
 854
 855 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
 856
 857 /*
 858  * Generic wrapper for dumping VPD identifiers by association.
 859  */
 860 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc)                           \
 861 static ssize_t target_core_dev_wwn_show_attr_##_name(                   \
 862         struct t10_wwn *t10_wwn,                                        \
 863         char *page)                                                     \
 864 {                                                                       \
 865         struct t10_vpd *vpd;                                                    \
 866         unsigned char buf[VPD_TMP_BUF_SIZE];                            \
 867         ssize_t len = 0;                                                \
 868                                                                         \
 869         spin_lock(&t10_wwn->t10_vpd_lock);                              \
 870         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {    \
 871                 if (vpd->association != _assoc)                         \
 872                         continue;                                       \
 873                                                                         \
 874                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 875                 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE);   \
 876                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 877                         break;                                          \
 878                 len += sprintf(page+len, "%s", buf);                    \
 879                                                                         \
 880                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 881                 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
 882                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 883                         break;                                          \
 884                 len += sprintf(page+len, "%s", buf);                    \
 885                                                                         \
 886                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 887                 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
 888                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 889                         break;                                          \
 890                 len += sprintf(page+len, "%s", buf);                    \
 891         }                                                               \
 892         spin_unlock(&t10_wwn->t10_vpd_lock);                            \
 893                                                                         \
 894         return len;                                                     \
 895 }
 896
 897 /*
 898  * VPD page 0x83 Association: Logical Unit
 899  */
 900 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
 901
 902 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
 903         struct t10_wwn *t10_wwn,
 904         const char *page,
 905         size_t count)
 906 {
 907         return -ENOSYS;
 908 }
 909
 910 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
 911
 912 /*
 913  * VPD page 0x83 Association: Target Port
 914  */
 915 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
 916
 917 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
 918         struct t10_wwn *t10_wwn,
 919         const char *page,
 920         size_t count)
 921 {
 922         return -ENOSYS;
 923 }
 924
 925 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
 926
 927 /*
 928  * VPD page 0x83 Association: SCSI Target Device
 929  */
 930 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
 931
 932 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
 933         struct t10_wwn *t10_wwn,
 934         const char *page,
 935         size_t count)
 936 {
 937         return -ENOSYS;
 938 }
 939
 940 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
 941
 942 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
 943
 944 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
 945         &target_core_dev_wwn_vpd_unit_serial.attr,
 946         &target_core_dev_wwn_vpd_protocol_identifier.attr,
 947         &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
 948         &target_core_dev_wwn_vpd_assoc_target_port.attr,
 949         &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
 950         NULL,
 951 };
 952
 953 static struct configfs_item_operations target_core_dev_wwn_ops = {
 954         .show_attribute         = target_core_dev_wwn_attr_show,
 955         .store_attribute        = target_core_dev_wwn_attr_store,
 956 };
 957
 958 static struct config_item_type target_core_dev_wwn_cit = {
 959         .ct_item_ops            = &target_core_dev_wwn_ops,
 960         .ct_attrs               = target_core_dev_wwn_attrs,
 961         .ct_owner               = THIS_MODULE,
 962 };
 963
 964 /*  End functions for struct config_item_type target_core_dev_wwn_cit */
 965
 966 /*  Start functions for struct config_item_type target_core_dev_pr_cit */
 967
 968 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
 969 #define SE_DEV_PR_ATTR(_name, _mode)                                    \
 970 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
 971         __CONFIGFS_EATTR(_name, _mode,                                  \
 972         target_core_dev_pr_show_attr_##_name,                           \
 973         target_core_dev_pr_store_attr_##_name);
 974
 975 #define SE_DEV_PR_ATTR_RO(_name);                                       \
 976 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
 977         __CONFIGFS_EATTR_RO(_name,                                      \
 978         target_core_dev_pr_show_attr_##_name);
 979
 980 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
 981                 char *page)
 982 {
 983         struct se_node_acl *se_nacl;
 984         struct t10_pr_registration *pr_reg;
 985         char i_buf[PR_REG_ISID_ID_LEN];
 986         int prf_isid;
 987
 988         memset(i_buf, 0, PR_REG_ISID_ID_LEN);
 989
 990         pr_reg = dev->dev_pr_res_holder;
 991         if (!pr_reg)
 992                 return sprintf(page, "No SPC-3 Reservation holder\n");
 993
 994         se_nacl = pr_reg->pr_reg_nacl;
 995         prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
 996                                 PR_REG_ISID_ID_LEN);
 997
 998         return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
 999                 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1000                 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
1001 }
1002
1003 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1004                 char *page)
1005 {
1006         struct se_node_acl *se_nacl;
1007         ssize_t len;
1008
1009         se_nacl = dev->dev_reserved_node_acl;
1010         if (se_nacl) {
1011                 len = sprintf(page,
1012                               "SPC-2 Reservation: %s Initiator: %s\n",
1013                               se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1014                               se_nacl->initiatorname);
1015         } else {
1016                 len = sprintf(page, "No SPC-2 Reservation holder\n");
1017         }
1018         return len;
1019 }
1020
1021 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
1022                 char *page)
1023 {
1024         int ret;
1025
1026         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1027                 return sprintf(page, "Passthrough\n");
1028
1029         spin_lock(&dev->dev_reservation_lock);
1030         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1031                 ret = target_core_dev_pr_show_spc2_res(dev, page);
1032         else
1033                 ret = target_core_dev_pr_show_spc3_res(dev, page);
1034         spin_unlock(&dev->dev_reservation_lock);
1035         return ret;
1036 }
1037
1038 SE_DEV_PR_ATTR_RO(res_holder);
1039
1040 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1041                 struct se_device *dev, char *page)
1042 {
1043         ssize_t len = 0;
1044
1045         spin_lock(&dev->dev_reservation_lock);
1046         if (!dev->dev_pr_res_holder) {
1047                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1048         } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1049                 len = sprintf(page, "SPC-3 Reservation: All Target"
1050                         " Ports registration\n");
1051         } else {
1052                 len = sprintf(page, "SPC-3 Reservation: Single"
1053                         " Target Port registration\n");
1054         }
1055
1056         spin_unlock(&dev->dev_reservation_lock);
1057         return len;
1058 }
1059
1060 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1061
1062 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1063                 struct se_device *dev, char *page)
1064 {
1065         return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
1066 }
1067
1068 SE_DEV_PR_ATTR_RO(res_pr_generation);
1069
1070 /*
1071  * res_pr_holder_tg_port
1072  */
1073 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1074                 struct se_device *dev, char *page)
1075 {
1076         struct se_node_acl *se_nacl;
1077         struct se_lun *lun;
1078         struct se_portal_group *se_tpg;
1079         struct t10_pr_registration *pr_reg;
1080         struct target_core_fabric_ops *tfo;
1081         ssize_t len = 0;
1082
1083         spin_lock(&dev->dev_reservation_lock);
1084         pr_reg = dev->dev_pr_res_holder;
1085         if (!pr_reg) {
1086                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1087                 goto out_unlock;
1088         }
1089
1090         se_nacl = pr_reg->pr_reg_nacl;
1091         se_tpg = se_nacl->se_tpg;
1092         lun = pr_reg->pr_reg_tg_pt_lun;
1093         tfo = se_tpg->se_tpg_tfo;
1094
1095         len += sprintf(page+len, "SPC-3 Reservation: %s"
1096                 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1097                 tfo->tpg_get_wwn(se_tpg));
1098         len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1099                 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1100                 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1101                 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1102                 tfo->get_fabric_name(), lun->unpacked_lun);
1103
1104 out_unlock:
1105         spin_unlock(&dev->dev_reservation_lock);
1106         return len;
1107 }
1108
1109 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1110
1111 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1112                 struct se_device *dev, char *page)
1113 {
1114         struct target_core_fabric_ops *tfo;
1115         struct t10_pr_registration *pr_reg;
1116         unsigned char buf[384];
1117         char i_buf[PR_REG_ISID_ID_LEN];
1118         ssize_t len = 0;
1119         int reg_count = 0, prf_isid;
1120
1121         len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1122
1123         spin_lock(&dev->t10_pr.registration_lock);
1124         list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1125                         pr_reg_list) {
1126
1127                 memset(buf, 0, 384);
1128                 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1129                 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1130                 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1131                                         PR_REG_ISID_ID_LEN);
1132                 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1133                         tfo->get_fabric_name(),
1134                         pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
1135                         &i_buf[0] : "", pr_reg->pr_res_key,
1136                         pr_reg->pr_res_generation);
1137
1138                 if (len + strlen(buf) >= PAGE_SIZE)
1139                         break;
1140
1141                 len += sprintf(page+len, "%s", buf);
1142                 reg_count++;
1143         }
1144         spin_unlock(&dev->t10_pr.registration_lock);
1145
1146         if (!reg_count)
1147                 len += sprintf(page+len, "None\n");
1148
1149         return len;
1150 }
1151
1152 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1153
1154 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1155                 struct se_device *dev, char *page)
1156 {
1157         struct t10_pr_registration *pr_reg;
1158         ssize_t len = 0;
1159
1160         spin_lock(&dev->dev_reservation_lock);
1161         pr_reg = dev->dev_pr_res_holder;
1162         if (pr_reg) {
1163                 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1164                         core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1165         } else {
1166                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1167         }
1168
1169         spin_unlock(&dev->dev_reservation_lock);
1170         return len;
1171 }
1172
1173 SE_DEV_PR_ATTR_RO(res_pr_type);
1174
1175 static ssize_t target_core_dev_pr_show_attr_res_type(
1176                 struct se_device *dev, char *page)
1177 {
1178         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1179                 return sprintf(page, "SPC_PASSTHROUGH\n");
1180         else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1181                 return sprintf(page, "SPC2_RESERVATIONS\n");
1182         else
1183                 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1184 }
1185
1186 SE_DEV_PR_ATTR_RO(res_type);
1187
1188 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1189                 struct se_device *dev, char *page)
1190 {
1191         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1192                 return 0;
1193
1194         return sprintf(page, "APTPL Bit Status: %s\n",
1195                 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1196 }
1197
1198 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1199
1200 /*
1201  * res_aptpl_metadata
1202  */
1203 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1204                 struct se_device *dev, char *page)
1205 {
1206         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1207                 return 0;
1208
1209         return sprintf(page, "Ready to process PR APTPL metadata..\n");
1210 }
1211
1212 enum {
1213         Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1214         Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1215         Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1216         Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1217 };
1218
1219 static match_table_t tokens = {
1220         {Opt_initiator_fabric, "initiator_fabric=%s"},
1221         {Opt_initiator_node, "initiator_node=%s"},
1222         {Opt_initiator_sid, "initiator_sid=%s"},
1223         {Opt_sa_res_key, "sa_res_key=%s"},
1224         {Opt_res_holder, "res_holder=%d"},
1225         {Opt_res_type, "res_type=%d"},
1226         {Opt_res_scope, "res_scope=%d"},
1227         {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1228         {Opt_mapped_lun, "mapped_lun=%d"},
1229         {Opt_target_fabric, "target_fabric=%s"},
1230         {Opt_target_node, "target_node=%s"},
1231         {Opt_tpgt, "tpgt=%d"},
1232         {Opt_port_rtpi, "port_rtpi=%d"},
1233         {Opt_target_lun, "target_lun=%d"},
1234         {Opt_err, NULL}
1235 };
1236
1237 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1238         struct se_device *dev,
1239         const char *page,
1240         size_t count)
1241 {
1242         unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1243         unsigned char *t_fabric = NULL, *t_port = NULL;
1244         char *orig, *ptr, *arg_p, *opts;
1245         substring_t args[MAX_OPT_ARGS];
1246         unsigned long long tmp_ll;
1247         u64 sa_res_key = 0;
1248         u32 mapped_lun = 0, target_lun = 0;
1249         int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1250         u16 port_rpti = 0, tpgt = 0;
1251         u8 type = 0, scope;
1252
1253         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1254                 return 0;
1255         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1256                 return 0;
1257
1258         if (dev->export_count) {
1259                 pr_debug("Unable to process APTPL metadata while"
1260                         " active fabric exports exist\n");
1261                 return -EINVAL;
1262         }
1263
1264         opts = kstrdup(page, GFP_KERNEL);
1265         if (!opts)
1266                 return -ENOMEM;
1267
1268         orig = opts;
1269         while ((ptr = strsep(&opts, ",\n")) != NULL) {
1270                 if (!*ptr)
1271                         continue;
1272
1273                 token = match_token(ptr, tokens, args);
1274                 switch (token) {
1275                 case Opt_initiator_fabric:
1276                         i_fabric = match_strdup(&args[0]);
1277                         if (!i_fabric) {
1278                                 ret = -ENOMEM;
1279                                 goto out;
1280                         }
1281                         break;
1282                 case Opt_initiator_node:
1283                         i_port = match_strdup(&args[0]);
1284                         if (!i_port) {
1285                                 ret = -ENOMEM;
1286                                 goto out;
1287                         }
1288                         if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1289                                 pr_err("APTPL metadata initiator_node="
1290                                         " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1291                                         PR_APTPL_MAX_IPORT_LEN);
1292                                 ret = -EINVAL;
1293                                 break;
1294                         }
1295                         break;
1296                 case Opt_initiator_sid:
1297                         isid = match_strdup(&args[0]);
1298                         if (!isid) {
1299                                 ret = -ENOMEM;
1300                                 goto out;
1301                         }
1302                         if (strlen(isid) >= PR_REG_ISID_LEN) {
1303                                 pr_err("APTPL metadata initiator_isid"
1304                                         "= exceeds PR_REG_ISID_LEN: %d\n",
1305                                         PR_REG_ISID_LEN);
1306                                 ret = -EINVAL;
1307                                 break;
1308                         }
1309                         break;
1310                 case Opt_sa_res_key:
1311                         arg_p = match_strdup(&args[0]);
1312                         if (!arg_p) {
1313                                 ret = -ENOMEM;
1314                                 goto out;
1315                         }
1316                         ret = strict_strtoull(arg_p, 0, &tmp_ll);
1317                         if (ret < 0) {
1318                                 pr_err("strict_strtoull() failed for"
1319                                         " sa_res_key=\n");
1320                                 goto out;
1321                         }
1322                         sa_res_key = (u64)tmp_ll;
1323                         break;
1324                 /*
1325                  * PR APTPL Metadata for Reservation
1326                  */
1327                 case Opt_res_holder:
1328                         match_int(args, &arg);
1329                         res_holder = arg;
1330                         break;
1331                 case Opt_res_type:
1332                         match_int(args, &arg);
1333                         type = (u8)arg;
1334                         break;
1335                 case Opt_res_scope:
1336                         match_int(args, &arg);
1337                         scope = (u8)arg;
1338                         break;
1339                 case Opt_res_all_tg_pt:
1340                         match_int(args, &arg);
1341                         all_tg_pt = (int)arg;
1342                         break;
1343                 case Opt_mapped_lun:
1344                         match_int(args, &arg);
1345                         mapped_lun = (u32)arg;
1346                         break;
1347                 /*
1348                  * PR APTPL Metadata for Target Port
1349                  */
1350                 case Opt_target_fabric:
1351                         t_fabric = match_strdup(&args[0]);
1352                         if (!t_fabric) {
1353                                 ret = -ENOMEM;
1354                                 goto out;
1355                         }
1356                         break;
1357                 case Opt_target_node:
1358                         t_port = match_strdup(&args[0]);
1359                         if (!t_port) {
1360                                 ret = -ENOMEM;
1361                                 goto out;
1362                         }
1363                         if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1364                                 pr_err("APTPL metadata target_node="
1365                                         " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1366                                         PR_APTPL_MAX_TPORT_LEN);
1367                                 ret = -EINVAL;
1368                                 break;
1369                         }
1370                         break;
1371                 case Opt_tpgt:
1372                         match_int(args, &arg);
1373                         tpgt = (u16)arg;
1374                         break;
1375                 case Opt_port_rtpi:
1376                         match_int(args, &arg);
1377                         port_rpti = (u16)arg;
1378                         break;
1379                 case Opt_target_lun:
1380                         match_int(args, &arg);
1381                         target_lun = (u32)arg;
1382                         break;
1383                 default:
1384                         break;
1385                 }
1386         }
1387
1388         if (!i_port || !t_port || !sa_res_key) {
1389                 pr_err("Illegal parameters for APTPL registration\n");
1390                 ret = -EINVAL;
1391                 goto out;
1392         }
1393
1394         if (res_holder && !(type)) {
1395                 pr_err("Illegal PR type: 0x%02x for reservation"
1396                                 " holder\n", type);
1397                 ret = -EINVAL;
1398                 goto out;
1399         }
1400
1401         ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1402                         i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1403                         res_holder, all_tg_pt, type);
1404 out:
1405         kfree(i_fabric);
1406         kfree(i_port);
1407         kfree(isid);
1408         kfree(t_fabric);
1409         kfree(t_port);
1410         kfree(orig);
1411         return (ret == 0) ? count : ret;
1412 }
1413
1414 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1415
1416 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
1417
1418 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1419         &target_core_dev_pr_res_holder.attr,
1420         &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1421         &target_core_dev_pr_res_pr_generation.attr,
1422         &target_core_dev_pr_res_pr_holder_tg_port.attr,
1423         &target_core_dev_pr_res_pr_registered_i_pts.attr,
1424         &target_core_dev_pr_res_pr_type.attr,
1425         &target_core_dev_pr_res_type.attr,
1426         &target_core_dev_pr_res_aptpl_active.attr,
1427         &target_core_dev_pr_res_aptpl_metadata.attr,
1428         NULL,
1429 };
1430
1431 static struct configfs_item_operations target_core_dev_pr_ops = {
1432         .show_attribute         = target_core_dev_pr_attr_show,
1433         .store_attribute        = target_core_dev_pr_attr_store,
1434 };
1435
1436 static struct config_item_type target_core_dev_pr_cit = {
1437         .ct_item_ops            = &target_core_dev_pr_ops,
1438         .ct_attrs               = target_core_dev_pr_attrs,
1439         .ct_owner               = THIS_MODULE,
1440 };
1441
1442 /*  End functions for struct config_item_type target_core_dev_pr_cit */
1443
1444 /*  Start functions for struct config_item_type target_core_dev_cit */
1445
1446 static ssize_t target_core_show_dev_info(void *p, char *page)
1447 {
1448         struct se_device *dev = p;
1449         struct se_subsystem_api *t = dev->transport;
1450         int bl = 0;
1451         ssize_t read_bytes = 0;
1452
1453         transport_dump_dev_state(dev, page, &bl);
1454         read_bytes += bl;
1455         read_bytes += t->show_configfs_dev_params(dev, page+read_bytes);
1456         return read_bytes;
1457 }
1458
1459 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1460         .attr   = { .ca_owner = THIS_MODULE,
1461                     .ca_name = "info",
1462                     .ca_mode = S_IRUGO },
1463         .show   = target_core_show_dev_info,
1464         .store  = NULL,
1465 };
1466
1467 static ssize_t target_core_store_dev_control(
1468         void *p,
1469         const char *page,
1470         size_t count)
1471 {
1472         struct se_device *dev = p;
1473         struct se_subsystem_api *t = dev->transport;
1474
1475         return t->set_configfs_dev_params(dev, page, count);
1476 }
1477
1478 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1479         .attr   = { .ca_owner = THIS_MODULE,
1480                     .ca_name = "control",
1481                     .ca_mode = S_IWUSR },
1482         .show   = NULL,
1483         .store  = target_core_store_dev_control,
1484 };
1485
1486 static ssize_t target_core_show_dev_alias(void *p, char *page)
1487 {
1488         struct se_device *dev = p;
1489
1490         if (!(dev->dev_flags & DF_USING_ALIAS))
1491                 return 0;
1492
1493         return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1494 }
1495
1496 static ssize_t target_core_store_dev_alias(
1497         void *p,
1498         const char *page,
1499         size_t count)
1500 {
1501         struct se_device *dev = p;
1502         struct se_hba *hba = dev->se_hba;
1503         ssize_t read_bytes;
1504
1505         if (count > (SE_DEV_ALIAS_LEN-1)) {
1506                 pr_err("alias count: %d exceeds"
1507                         " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1508                         SE_DEV_ALIAS_LEN-1);
1509                 return -EINVAL;
1510         }
1511
1512         read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1513         if (!read_bytes)
1514                 return -EINVAL;
1515         if (dev->dev_alias[read_bytes - 1] == '\n')
1516                 dev->dev_alias[read_bytes - 1] = '\0';
1517
1518         dev->dev_flags |= DF_USING_ALIAS;
1519
1520         pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1521                 config_item_name(&hba->hba_group.cg_item),
1522                 config_item_name(&dev->dev_group.cg_item),
1523                 dev->dev_alias);
1524
1525         return read_bytes;
1526 }
1527
1528 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1529         .attr   = { .ca_owner = THIS_MODULE,
1530                     .ca_name = "alias",
1531                     .ca_mode =  S_IRUGO | S_IWUSR },
1532         .show   = target_core_show_dev_alias,
1533         .store  = target_core_store_dev_alias,
1534 };
1535
1536 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1537 {
1538         struct se_device *dev = p;
1539
1540         if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1541                 return 0;
1542
1543         return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1544 }
1545
1546 static ssize_t target_core_store_dev_udev_path(
1547         void *p,
1548         const char *page,
1549         size_t count)
1550 {
1551         struct se_device *dev = p;
1552         struct se_hba *hba = dev->se_hba;
1553         ssize_t read_bytes;
1554
1555         if (count > (SE_UDEV_PATH_LEN-1)) {
1556                 pr_err("udev_path count: %d exceeds"
1557                         " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1558                         SE_UDEV_PATH_LEN-1);
1559                 return -EINVAL;
1560         }
1561
1562         read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1563                         "%s", page);
1564         if (!read_bytes)
1565                 return -EINVAL;
1566         if (dev->udev_path[read_bytes - 1] == '\n')
1567                 dev->udev_path[read_bytes - 1] = '\0';
1568
1569         dev->dev_flags |= DF_USING_UDEV_PATH;
1570
1571         pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1572                 config_item_name(&hba->hba_group.cg_item),
1573                 config_item_name(&dev->dev_group.cg_item),
1574                 dev->udev_path);
1575
1576         return read_bytes;
1577 }
1578
1579 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1580         .attr   = { .ca_owner = THIS_MODULE,
1581                     .ca_name = "udev_path",
1582                     .ca_mode =  S_IRUGO | S_IWUSR },
1583         .show   = target_core_show_dev_udev_path,
1584         .store  = target_core_store_dev_udev_path,
1585 };
1586
1587 static ssize_t target_core_store_dev_enable(
1588         void *p,
1589         const char *page,
1590         size_t count)
1591 {
1592         struct se_device *dev = p;
1593         char *ptr;
1594         int ret;
1595
1596         ptr = strstr(page, "1");
1597         if (!ptr) {
1598                 pr_err("For dev_enable ops, only valid value"
1599                                 " is \"1\"\n");
1600                 return -EINVAL;
1601         }
1602
1603         ret = target_configure_device(dev);
1604         if (ret)
1605                 return ret;
1606         return count;
1607 }
1608
1609 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1610         .attr   = { .ca_owner = THIS_MODULE,
1611                     .ca_name = "enable",
1612                     .ca_mode = S_IWUSR },
1613         .show   = NULL,
1614         .store  = target_core_store_dev_enable,
1615 };
1616
1617 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1618 {
1619         struct se_device *dev = p;
1620         struct config_item *lu_ci;
1621         struct t10_alua_lu_gp *lu_gp;
1622         struct t10_alua_lu_gp_member *lu_gp_mem;
1623         ssize_t len = 0;
1624
1625         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1626         if (!lu_gp_mem)
1627                 return 0;
1628
1629         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1630         lu_gp = lu_gp_mem->lu_gp;
1631         if (lu_gp) {
1632                 lu_ci = &lu_gp->lu_gp_group.cg_item;
1633                 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1634                         config_item_name(lu_ci), lu_gp->lu_gp_id);
1635         }
1636         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1637
1638         return len;
1639 }
1640
1641 static ssize_t target_core_store_alua_lu_gp(
1642         void *p,
1643         const char *page,
1644         size_t count)
1645 {
1646         struct se_device *dev = p;
1647         struct se_hba *hba = dev->se_hba;
1648         struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1649         struct t10_alua_lu_gp_member *lu_gp_mem;
1650         unsigned char buf[LU_GROUP_NAME_BUF];
1651         int move = 0;
1652
1653         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1654         if (!lu_gp_mem)
1655                 return 0;
1656
1657         if (count > LU_GROUP_NAME_BUF) {
1658                 pr_err("ALUA LU Group Alias too large!\n");
1659                 return -EINVAL;
1660         }
1661         memset(buf, 0, LU_GROUP_NAME_BUF);
1662         memcpy(buf, page, count);
1663         /*
1664          * Any ALUA logical unit alias besides "NULL" means we will be
1665          * making a new group association.
1666          */
1667         if (strcmp(strstrip(buf), "NULL")) {
1668                 /*
1669                  * core_alua_get_lu_gp_by_name() will increment reference to
1670                  * struct t10_alua_lu_gp.  This reference is released with
1671                  * core_alua_get_lu_gp_by_name below().
1672                  */
1673                 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1674                 if (!lu_gp_new)
1675                         return -ENODEV;
1676         }
1677
1678         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1679         lu_gp = lu_gp_mem->lu_gp;
1680         if (lu_gp) {
1681                 /*
1682                  * Clearing an existing lu_gp association, and replacing
1683                  * with NULL
1684                  */
1685                 if (!lu_gp_new) {
1686                         pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1687                                 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1688                                 " %hu\n",
1689                                 config_item_name(&hba->hba_group.cg_item),
1690                                 config_item_name(&dev->dev_group.cg_item),
1691                                 config_item_name(&lu_gp->lu_gp_group.cg_item),
1692                                 lu_gp->lu_gp_id);
1693
1694                         __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1695                         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1696
1697                         return count;
1698                 }
1699                 /*
1700                  * Removing existing association of lu_gp_mem with lu_gp
1701                  */
1702                 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1703                 move = 1;
1704         }
1705         /*
1706          * Associate lu_gp_mem with lu_gp_new.
1707          */
1708         __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1709         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1710
1711         pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1712                 " core/alua/lu_gps/%s, ID: %hu\n",
1713                 (move) ? "Moving" : "Adding",
1714                 config_item_name(&hba->hba_group.cg_item),
1715                 config_item_name(&dev->dev_group.cg_item),
1716                 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1717                 lu_gp_new->lu_gp_id);
1718
1719         core_alua_put_lu_gp_from_name(lu_gp_new);
1720         return count;
1721 }
1722
1723 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1724         .attr   = { .ca_owner = THIS_MODULE,
1725                     .ca_name = "alua_lu_gp",
1726                     .ca_mode = S_IRUGO | S_IWUSR },
1727         .show   = target_core_show_alua_lu_gp,
1728         .store  = target_core_store_alua_lu_gp,
1729 };
1730
1731 static struct configfs_attribute *lio_core_dev_attrs[] = {
1732         &target_core_attr_dev_info.attr,
1733         &target_core_attr_dev_control.attr,
1734         &target_core_attr_dev_alias.attr,
1735         &target_core_attr_dev_udev_path.attr,
1736         &target_core_attr_dev_enable.attr,
1737         &target_core_attr_dev_alua_lu_gp.attr,
1738         NULL,
1739 };
1740
1741 static void target_core_dev_release(struct config_item *item)
1742 {
1743         struct config_group *dev_cg = to_config_group(item);
1744         struct se_device *dev =
1745                 container_of(dev_cg, struct se_device, dev_group);
1746
1747         kfree(dev_cg->default_groups);
1748         target_free_device(dev);
1749 }
1750
1751 static ssize_t target_core_dev_show(struct config_item *item,
1752                                      struct configfs_attribute *attr,
1753                                      char *page)
1754 {
1755         struct config_group *dev_cg = to_config_group(item);
1756         struct se_device *dev =
1757                 container_of(dev_cg, struct se_device, dev_group);
1758         struct target_core_configfs_attribute *tc_attr = container_of(
1759                         attr, struct target_core_configfs_attribute, attr);
1760
1761         if (!tc_attr->show)
1762                 return -EINVAL;
1763
1764         return tc_attr->show(dev, page);
1765 }
1766
1767 static ssize_t target_core_dev_store(struct config_item *item,
1768                                       struct configfs_attribute *attr,
1769                                       const char *page, size_t count)
1770 {
1771         struct config_group *dev_cg = to_config_group(item);
1772         struct se_device *dev =
1773                 container_of(dev_cg, struct se_device, dev_group);
1774         struct target_core_configfs_attribute *tc_attr = container_of(
1775                         attr, struct target_core_configfs_attribute, attr);
1776
1777         if (!tc_attr->store)
1778                 return -EINVAL;
1779
1780         return tc_attr->store(dev, page, count);
1781 }
1782
1783 static struct configfs_item_operations target_core_dev_item_ops = {
1784         .release                = target_core_dev_release,
1785         .show_attribute         = target_core_dev_show,
1786         .store_attribute        = target_core_dev_store,
1787 };
1788
1789 static struct config_item_type target_core_dev_cit = {
1790         .ct_item_ops            = &target_core_dev_item_ops,
1791         .ct_attrs               = lio_core_dev_attrs,
1792         .ct_owner               = THIS_MODULE,
1793 };
1794
1795 /* End functions for struct config_item_type target_core_dev_cit */
1796
1797 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
1798
1799 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
1800 #define SE_DEV_ALUA_LU_ATTR(_name, _mode)                               \
1801 static struct target_core_alua_lu_gp_attribute                          \
1802                         target_core_alua_lu_gp_##_name =                \
1803         __CONFIGFS_EATTR(_name, _mode,                                  \
1804         target_core_alua_lu_gp_show_attr_##_name,                       \
1805         target_core_alua_lu_gp_store_attr_##_name);
1806
1807 #define SE_DEV_ALUA_LU_ATTR_RO(_name)                                   \
1808 static struct target_core_alua_lu_gp_attribute                          \
1809                         target_core_alua_lu_gp_##_name =                \
1810         __CONFIGFS_EATTR_RO(_name,                                      \
1811         target_core_alua_lu_gp_show_attr_##_name);
1812
1813 /*
1814  * lu_gp_id
1815  */
1816 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
1817         struct t10_alua_lu_gp *lu_gp,
1818         char *page)
1819 {
1820         if (!lu_gp->lu_gp_valid_id)
1821                 return 0;
1822
1823         return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
1824 }
1825
1826 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
1827         struct t10_alua_lu_gp *lu_gp,
1828         const char *page,
1829         size_t count)
1830 {
1831         struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
1832         unsigned long lu_gp_id;
1833         int ret;
1834
1835         ret = strict_strtoul(page, 0, &lu_gp_id);
1836         if (ret < 0) {
1837                 pr_err("strict_strtoul() returned %d for"
1838                         " lu_gp_id\n", ret);
1839                 return -EINVAL;
1840         }
1841         if (lu_gp_id > 0x0000ffff) {
1842                 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
1843                         " 0x0000ffff\n", lu_gp_id);
1844                 return -EINVAL;
1845         }
1846
1847         ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
1848         if (ret < 0)
1849                 return -EINVAL;
1850
1851         pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
1852                 " Group: core/alua/lu_gps/%s to ID: %hu\n",
1853                 config_item_name(&alua_lu_gp_cg->cg_item),
1854                 lu_gp->lu_gp_id);
1855
1856         return count;
1857 }
1858
1859 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
1860
1861 /*
1862  * members
1863  */
1864 static ssize_t target_core_alua_lu_gp_show_attr_members(
1865         struct t10_alua_lu_gp *lu_gp,
1866         char *page)
1867 {
1868         struct se_device *dev;
1869         struct se_hba *hba;
1870         struct t10_alua_lu_gp_member *lu_gp_mem;
1871         ssize_t len = 0, cur_len;
1872         unsigned char buf[LU_GROUP_NAME_BUF];
1873
1874         memset(buf, 0, LU_GROUP_NAME_BUF);
1875
1876         spin_lock(&lu_gp->lu_gp_lock);
1877         list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
1878                 dev = lu_gp_mem->lu_gp_mem_dev;
1879                 hba = dev->se_hba;
1880
1881                 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
1882                         config_item_name(&hba->hba_group.cg_item),
1883                         config_item_name(&dev->dev_group.cg_item));
1884                 cur_len++; /* Extra byte for NULL terminator */
1885
1886                 if ((cur_len + len) > PAGE_SIZE) {
1887                         pr_warn("Ran out of lu_gp_show_attr"
1888                                 "_members buffer\n");
1889                         break;
1890                 }
1891                 memcpy(page+len, buf, cur_len);
1892                 len += cur_len;
1893         }
1894         spin_unlock(&lu_gp->lu_gp_lock);
1895
1896         return len;
1897 }
1898
1899 SE_DEV_ALUA_LU_ATTR_RO(members);
1900
1901 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
1902
1903 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
1904         &target_core_alua_lu_gp_lu_gp_id.attr,
1905         &target_core_alua_lu_gp_members.attr,
1906         NULL,
1907 };
1908
1909 static void target_core_alua_lu_gp_release(struct config_item *item)
1910 {
1911         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1912                         struct t10_alua_lu_gp, lu_gp_group);
1913
1914         core_alua_free_lu_gp(lu_gp);
1915 }
1916
1917 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
1918         .release                = target_core_alua_lu_gp_release,
1919         .show_attribute         = target_core_alua_lu_gp_attr_show,
1920         .store_attribute        = target_core_alua_lu_gp_attr_store,
1921 };
1922
1923 static struct config_item_type target_core_alua_lu_gp_cit = {
1924         .ct_item_ops            = &target_core_alua_lu_gp_ops,
1925         .ct_attrs               = target_core_alua_lu_gp_attrs,
1926         .ct_owner               = THIS_MODULE,
1927 };
1928
1929 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
1930
1931 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
1932
1933 static struct config_group *target_core_alua_create_lu_gp(
1934         struct config_group *group,
1935         const char *name)
1936 {
1937         struct t10_alua_lu_gp *lu_gp;
1938         struct config_group *alua_lu_gp_cg = NULL;
1939         struct config_item *alua_lu_gp_ci = NULL;
1940
1941         lu_gp = core_alua_allocate_lu_gp(name, 0);
1942         if (IS_ERR(lu_gp))
1943                 return NULL;
1944
1945         alua_lu_gp_cg = &lu_gp->lu_gp_group;
1946         alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
1947
1948         config_group_init_type_name(alua_lu_gp_cg, name,
1949                         &target_core_alua_lu_gp_cit);
1950
1951         pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
1952                 " Group: core/alua/lu_gps/%s\n",
1953                 config_item_name(alua_lu_gp_ci));
1954
1955         return alua_lu_gp_cg;
1956
1957 }
1958
1959 static void target_core_alua_drop_lu_gp(
1960         struct config_group *group,
1961         struct config_item *item)
1962 {
1963         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1964                         struct t10_alua_lu_gp, lu_gp_group);
1965
1966         pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
1967                 " Group: core/alua/lu_gps/%s, ID: %hu\n",
1968                 config_item_name(item), lu_gp->lu_gp_id);
1969         /*
1970          * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
1971          * -> target_core_alua_lu_gp_release()
1972          */
1973         config_item_put(item);
1974 }
1975
1976 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
1977         .make_group             = &target_core_alua_create_lu_gp,
1978         .drop_item              = &target_core_alua_drop_lu_gp,
1979 };
1980
1981 static struct config_item_type target_core_alua_lu_gps_cit = {
1982         .ct_item_ops            = NULL,
1983         .ct_group_ops           = &target_core_alua_lu_gps_group_ops,
1984         .ct_owner               = THIS_MODULE,
1985 };
1986
1987 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
1988
1989 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
1990
1991 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
1992 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode)                            \
1993 static struct target_core_alua_tg_pt_gp_attribute                       \
1994                         target_core_alua_tg_pt_gp_##_name =             \
1995         __CONFIGFS_EATTR(_name, _mode,                                  \
1996         target_core_alua_tg_pt_gp_show_attr_##_name,                    \
1997         target_core_alua_tg_pt_gp_store_attr_##_name);
1998
1999 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name)                                \
2000 static struct target_core_alua_tg_pt_gp_attribute                       \
2001                         target_core_alua_tg_pt_gp_##_name =             \
2002         __CONFIGFS_EATTR_RO(_name,                                      \
2003         target_core_alua_tg_pt_gp_show_attr_##_name);
2004
2005 /*
2006  * alua_access_state
2007  */
2008 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2009         struct t10_alua_tg_pt_gp *tg_pt_gp,
2010         char *page)
2011 {
2012         return sprintf(page, "%d\n",
2013                 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2014 }
2015
2016 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2017         struct t10_alua_tg_pt_gp *tg_pt_gp,
2018         const char *page,
2019         size_t count)
2020 {
2021         struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2022         unsigned long tmp;
2023         int new_state, ret;
2024
2025         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2026                 pr_err("Unable to do implict ALUA on non valid"
2027                         " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2028                 return -EINVAL;
2029         }
2030
2031         ret = strict_strtoul(page, 0, &tmp);
2032         if (ret < 0) {
2033                 pr_err("Unable to extract new ALUA access state from"
2034                                 " %s\n", page);
2035                 return -EINVAL;
2036         }
2037         new_state = (int)tmp;
2038
2039         if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2040                 pr_err("Unable to process implict configfs ALUA"
2041                         " transition while TPGS_IMPLICT_ALUA is disabled\n");
2042                 return -EINVAL;
2043         }
2044
2045         ret = core_alua_do_port_transition(tg_pt_gp, dev,
2046                                         NULL, NULL, new_state, 0);
2047         return (!ret) ? count : -EINVAL;
2048 }
2049
2050 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2051
2052 /*
2053  * alua_access_status
2054  */
2055 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2056         struct t10_alua_tg_pt_gp *tg_pt_gp,
2057         char *page)
2058 {
2059         return sprintf(page, "%s\n",
2060                 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2061 }
2062
2063 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2064         struct t10_alua_tg_pt_gp *tg_pt_gp,
2065         const char *page,
2066         size_t count)
2067 {
2068         unsigned long tmp;
2069         int new_status, ret;
2070
2071         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2072                 pr_err("Unable to do set ALUA access status on non"
2073                         " valid tg_pt_gp ID: %hu\n",
2074                         tg_pt_gp->tg_pt_gp_valid_id);
2075                 return -EINVAL;
2076         }
2077
2078         ret = strict_strtoul(page, 0, &tmp);
2079         if (ret < 0) {
2080                 pr_err("Unable to extract new ALUA access status"
2081                                 " from %s\n", page);
2082                 return -EINVAL;
2083         }
2084         new_status = (int)tmp;
2085
2086         if ((new_status != ALUA_STATUS_NONE) &&
2087             (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2088             (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2089                 pr_err("Illegal ALUA access status: 0x%02x\n",
2090                                 new_status);
2091                 return -EINVAL;
2092         }
2093
2094         tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2095         return count;
2096 }
2097
2098 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2099
2100 /*
2101  * alua_access_type
2102  */
2103 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2104         struct t10_alua_tg_pt_gp *tg_pt_gp,
2105         char *page)
2106 {
2107         return core_alua_show_access_type(tg_pt_gp, page);
2108 }
2109
2110 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2111         struct t10_alua_tg_pt_gp *tg_pt_gp,
2112         const char *page,
2113         size_t count)
2114 {
2115         return core_alua_store_access_type(tg_pt_gp, page, count);
2116 }
2117
2118 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2119
2120 /*
2121  * alua_write_metadata
2122  */
2123 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2124         struct t10_alua_tg_pt_gp *tg_pt_gp,
2125         char *page)
2126 {
2127         return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2128 }
2129
2130 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2131         struct t10_alua_tg_pt_gp *tg_pt_gp,
2132         const char *page,
2133         size_t count)
2134 {
2135         unsigned long tmp;
2136         int ret;
2137
2138         ret = strict_strtoul(page, 0, &tmp);
2139         if (ret < 0) {
2140                 pr_err("Unable to extract alua_write_metadata\n");
2141                 return -EINVAL;
2142         }
2143
2144         if ((tmp != 0) && (tmp != 1)) {
2145                 pr_err("Illegal value for alua_write_metadata:"
2146                         " %lu\n", tmp);
2147                 return -EINVAL;
2148         }
2149         tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2150
2151         return count;
2152 }
2153
2154 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2155
2156
2157
2158 /*
2159  * nonop_delay_msecs
2160  */
2161 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2162         struct t10_alua_tg_pt_gp *tg_pt_gp,
2163         char *page)
2164 {
2165         return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2166
2167 }
2168
2169 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2170         struct t10_alua_tg_pt_gp *tg_pt_gp,
2171         const char *page,
2172         size_t count)
2173 {
2174         return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2175 }
2176
2177 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2178
2179 /*
2180  * trans_delay_msecs
2181  */
2182 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2183         struct t10_alua_tg_pt_gp *tg_pt_gp,
2184         char *page)
2185 {
2186         return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2187 }
2188
2189 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2190         struct t10_alua_tg_pt_gp *tg_pt_gp,
2191         const char *page,
2192         size_t count)
2193 {
2194         return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2195 }
2196
2197 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2198
2199 /*
2200  * implict_trans_secs
2201  */
2202 static ssize_t target_core_alua_tg_pt_gp_show_attr_implict_trans_secs(
2203         struct t10_alua_tg_pt_gp *tg_pt_gp,
2204         char *page)
2205 {
2206         return core_alua_show_implict_trans_secs(tg_pt_gp, page);
2207 }
2208
2209 static ssize_t target_core_alua_tg_pt_gp_store_attr_implict_trans_secs(
2210         struct t10_alua_tg_pt_gp *tg_pt_gp,
2211         const char *page,
2212         size_t count)
2213 {
2214         return core_alua_store_implict_trans_secs(tg_pt_gp, page, count);
2215 }
2216
2217 SE_DEV_ALUA_TG_PT_ATTR(implict_trans_secs, S_IRUGO | S_IWUSR);
2218
2219 /*
2220  * preferred
2221  */
2222
2223 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2224         struct t10_alua_tg_pt_gp *tg_pt_gp,
2225         char *page)
2226 {
2227         return core_alua_show_preferred_bit(tg_pt_gp, page);
2228 }
2229
2230 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2231         struct t10_alua_tg_pt_gp *tg_pt_gp,
2232         const char *page,
2233         size_t count)
2234 {
2235         return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2236 }
2237
2238 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2239
2240 /*
2241  * tg_pt_gp_id
2242  */
2243 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2244         struct t10_alua_tg_pt_gp *tg_pt_gp,
2245         char *page)
2246 {
2247         if (!tg_pt_gp->tg_pt_gp_valid_id)
2248                 return 0;
2249
2250         return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2251 }
2252
2253 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2254         struct t10_alua_tg_pt_gp *tg_pt_gp,
2255         const char *page,
2256         size_t count)
2257 {
2258         struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2259         unsigned long tg_pt_gp_id;
2260         int ret;
2261
2262         ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2263         if (ret < 0) {
2264                 pr_err("strict_strtoul() returned %d for"
2265                         " tg_pt_gp_id\n", ret);
2266                 return -EINVAL;
2267         }
2268         if (tg_pt_gp_id > 0x0000ffff) {
2269                 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2270                         " 0x0000ffff\n", tg_pt_gp_id);
2271                 return -EINVAL;
2272         }
2273
2274         ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2275         if (ret < 0)
2276                 return -EINVAL;
2277
2278         pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2279                 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2280                 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2281                 tg_pt_gp->tg_pt_gp_id);
2282
2283         return count;
2284 }
2285
2286 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2287
2288 /*
2289  * members
2290  */
2291 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2292         struct t10_alua_tg_pt_gp *tg_pt_gp,
2293         char *page)
2294 {
2295         struct se_port *port;
2296         struct se_portal_group *tpg;
2297         struct se_lun *lun;
2298         struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2299         ssize_t len = 0, cur_len;
2300         unsigned char buf[TG_PT_GROUP_NAME_BUF];
2301
2302         memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2303
2304         spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2305         list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2306                         tg_pt_gp_mem_list) {
2307                 port = tg_pt_gp_mem->tg_pt;
2308                 tpg = port->sep_tpg;
2309                 lun = port->sep_lun;
2310
2311                 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2312                         "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2313                         tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2314                         tpg->se_tpg_tfo->tpg_get_tag(tpg),
2315                         config_item_name(&lun->lun_group.cg_item));
2316                 cur_len++; /* Extra byte for NULL terminator */
2317
2318                 if ((cur_len + len) > PAGE_SIZE) {
2319                         pr_warn("Ran out of lu_gp_show_attr"
2320                                 "_members buffer\n");
2321                         break;
2322                 }
2323                 memcpy(page+len, buf, cur_len);
2324                 len += cur_len;
2325         }
2326         spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2327
2328         return len;
2329 }
2330
2331 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2332
2333 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2334                         tg_pt_gp_group);
2335
2336 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2337         &target_core_alua_tg_pt_gp_alua_access_state.attr,
2338         &target_core_alua_tg_pt_gp_alua_access_status.attr,
2339         &target_core_alua_tg_pt_gp_alua_access_type.attr,
2340         &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2341         &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2342         &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2343         &target_core_alua_tg_pt_gp_implict_trans_secs.attr,
2344         &target_core_alua_tg_pt_gp_preferred.attr,
2345         &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2346         &target_core_alua_tg_pt_gp_members.attr,
2347         NULL,
2348 };
2349
2350 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2351 {
2352         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2353                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2354
2355         core_alua_free_tg_pt_gp(tg_pt_gp);
2356 }
2357
2358 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2359         .release                = target_core_alua_tg_pt_gp_release,
2360         .show_attribute         = target_core_alua_tg_pt_gp_attr_show,
2361         .store_attribute        = target_core_alua_tg_pt_gp_attr_store,
2362 };
2363
2364 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2365         .ct_item_ops            = &target_core_alua_tg_pt_gp_ops,
2366         .ct_attrs               = target_core_alua_tg_pt_gp_attrs,
2367         .ct_owner               = THIS_MODULE,
2368 };
2369
2370 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2371
2372 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2373
2374 static struct config_group *target_core_alua_create_tg_pt_gp(
2375         struct config_group *group,
2376         const char *name)
2377 {
2378         struct t10_alua *alua = container_of(group, struct t10_alua,
2379                                         alua_tg_pt_gps_group);
2380         struct t10_alua_tg_pt_gp *tg_pt_gp;
2381         struct config_group *alua_tg_pt_gp_cg = NULL;
2382         struct config_item *alua_tg_pt_gp_ci = NULL;
2383
2384         tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2385         if (!tg_pt_gp)
2386                 return NULL;
2387
2388         alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2389         alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2390
2391         config_group_init_type_name(alua_tg_pt_gp_cg, name,
2392                         &target_core_alua_tg_pt_gp_cit);
2393
2394         pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2395                 " Group: alua/tg_pt_gps/%s\n",
2396                 config_item_name(alua_tg_pt_gp_ci));
2397
2398         return alua_tg_pt_gp_cg;
2399 }
2400
2401 static void target_core_alua_drop_tg_pt_gp(
2402         struct config_group *group,
2403         struct config_item *item)
2404 {
2405         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2406                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2407
2408         pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2409                 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2410                 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2411         /*
2412          * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2413          * -> target_core_alua_tg_pt_gp_release().
2414          */
2415         config_item_put(item);
2416 }
2417
2418 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2419         .make_group             = &target_core_alua_create_tg_pt_gp,
2420         .drop_item              = &target_core_alua_drop_tg_pt_gp,
2421 };
2422
2423 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2424         .ct_group_ops           = &target_core_alua_tg_pt_gps_group_ops,
2425         .ct_owner               = THIS_MODULE,
2426 };
2427
2428 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2429
2430 /* Start functions for struct config_item_type target_core_alua_cit */
2431
2432 /*
2433  * target_core_alua_cit is a ConfigFS group that lives under
2434  * /sys/kernel/config/target/core/alua.  There are default groups
2435  * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2436  * target_core_alua_cit in target_core_init_configfs() below.
2437  */
2438 static struct config_item_type target_core_alua_cit = {
2439         .ct_item_ops            = NULL,
2440         .ct_attrs               = NULL,
2441         .ct_owner               = THIS_MODULE,
2442 };
2443
2444 /* End functions for struct config_item_type target_core_alua_cit */
2445
2446 /* Start functions for struct config_item_type target_core_stat_cit */
2447
2448 static struct config_group *target_core_stat_mkdir(
2449         struct config_group *group,
2450         const char *name)
2451 {
2452         return ERR_PTR(-ENOSYS);
2453 }
2454
2455 static void target_core_stat_rmdir(
2456         struct config_group *group,
2457         struct config_item *item)
2458 {
2459         return;
2460 }
2461
2462 static struct configfs_group_operations target_core_stat_group_ops = {
2463         .make_group             = &target_core_stat_mkdir,
2464         .drop_item              = &target_core_stat_rmdir,
2465 };
2466
2467 static struct config_item_type target_core_stat_cit = {
2468         .ct_group_ops           = &target_core_stat_group_ops,
2469         .ct_owner               = THIS_MODULE,
2470 };
2471
2472 /* End functions for struct config_item_type target_core_stat_cit */
2473
2474 /* Start functions for struct config_item_type target_core_hba_cit */
2475
2476 static struct config_group *target_core_make_subdev(
2477         struct config_group *group,
2478         const char *name)
2479 {
2480         struct t10_alua_tg_pt_gp *tg_pt_gp;
2481         struct se_subsystem_api *t;
2482         struct config_item *hba_ci = &group->cg_item;
2483         struct se_hba *hba = item_to_hba(hba_ci);
2484         struct se_device *dev;
2485         struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2486         struct config_group *dev_stat_grp = NULL;
2487         int errno = -ENOMEM, ret;
2488
2489         ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2490         if (ret)
2491                 return ERR_PTR(ret);
2492         /*
2493          * Locate the struct se_subsystem_api from parent's struct se_hba.
2494          */
2495         t = hba->transport;
2496
2497         dev = target_alloc_device(hba, name);
2498         if (!dev)
2499                 goto out_unlock;
2500
2501         dev_cg = &dev->dev_group;
2502
2503         dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
2504                         GFP_KERNEL);
2505         if (!dev_cg->default_groups)
2506                 goto out_free_device;
2507
2508         config_group_init_type_name(dev_cg, name, &target_core_dev_cit);
2509         config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2510                         &target_core_dev_attrib_cit);
2511         config_group_init_type_name(&dev->dev_pr_group, "pr",
2512                         &target_core_dev_pr_cit);
2513         config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2514                         &target_core_dev_wwn_cit);
2515         config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2516                         "alua", &target_core_alua_tg_pt_gps_cit);
2517         config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2518                         "statistics", &target_core_stat_cit);
2519
2520         dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
2521         dev_cg->default_groups[1] = &dev->dev_pr_group;
2522         dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
2523         dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
2524         dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
2525         dev_cg->default_groups[5] = NULL;
2526         /*
2527          * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2528          */
2529         tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2530         if (!tg_pt_gp)
2531                 goto out_free_dev_cg_default_groups;
2532         dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2533
2534         tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2535         tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2536                                 GFP_KERNEL);
2537         if (!tg_pt_gp_cg->default_groups) {
2538                 pr_err("Unable to allocate tg_pt_gp_cg->"
2539                                 "default_groups\n");
2540                 goto out_free_tg_pt_gp;
2541         }
2542
2543         config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2544                         "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2545         tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2546         tg_pt_gp_cg->default_groups[1] = NULL;
2547         /*
2548          * Add core/$HBA/$DEV/statistics/ default groups
2549          */
2550         dev_stat_grp = &dev->dev_stat_grps.stat_group;
2551         dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
2552                                 GFP_KERNEL);
2553         if (!dev_stat_grp->default_groups) {
2554                 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2555                 goto out_free_tg_pt_gp_cg_default_groups;
2556         }
2557         target_stat_setup_dev_default_groups(dev);
2558
2559         mutex_unlock(&hba->hba_access_mutex);
2560         return dev_cg;
2561
2562 out_free_tg_pt_gp_cg_default_groups:
2563         kfree(tg_pt_gp_cg->default_groups);
2564 out_free_tg_pt_gp:
2565         core_alua_free_tg_pt_gp(tg_pt_gp);
2566 out_free_dev_cg_default_groups:
2567         kfree(dev_cg->default_groups);
2568 out_free_device:
2569         target_free_device(dev);
2570 out_unlock:
2571         mutex_unlock(&hba->hba_access_mutex);
2572         return ERR_PTR(errno);
2573 }
2574
2575 static void target_core_drop_subdev(
2576         struct config_group *group,
2577         struct config_item *item)
2578 {
2579         struct config_group *dev_cg = to_config_group(item);
2580         struct se_device *dev =
2581                 container_of(dev_cg, struct se_device, dev_group);
2582         struct se_hba *hba;
2583         struct config_item *df_item;
2584         struct config_group *tg_pt_gp_cg, *dev_stat_grp;
2585         int i;
2586
2587         hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
2588
2589         mutex_lock(&hba->hba_access_mutex);
2590
2591         dev_stat_grp = &dev->dev_stat_grps.stat_group;
2592         for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2593                 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2594                 dev_stat_grp->default_groups[i] = NULL;
2595                 config_item_put(df_item);
2596         }
2597         kfree(dev_stat_grp->default_groups);
2598
2599         tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2600         for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2601                 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2602                 tg_pt_gp_cg->default_groups[i] = NULL;
2603                 config_item_put(df_item);
2604         }
2605         kfree(tg_pt_gp_cg->default_groups);
2606         /*
2607          * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2608          * directly from target_core_alua_tg_pt_gp_release().
2609          */
2610         dev->t10_alua.default_tg_pt_gp = NULL;
2611
2612         for (i = 0; dev_cg->default_groups[i]; i++) {
2613                 df_item = &dev_cg->default_groups[i]->cg_item;
2614                 dev_cg->default_groups[i] = NULL;
2615                 config_item_put(df_item);
2616         }
2617         /*
2618          * se_dev is released from target_core_dev_item_ops->release()
2619          */
2620         config_item_put(item);
2621         mutex_unlock(&hba->hba_access_mutex);
2622 }
2623
2624 static struct configfs_group_operations target_core_hba_group_ops = {
2625         .make_group             = target_core_make_subdev,
2626         .drop_item              = target_core_drop_subdev,
2627 };
2628
2629 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2630 #define SE_HBA_ATTR(_name, _mode)                               \
2631 static struct target_core_hba_attribute                         \
2632                 target_core_hba_##_name =                       \
2633                 __CONFIGFS_EATTR(_name, _mode,                  \
2634                 target_core_hba_show_attr_##_name,              \
2635                 target_core_hba_store_attr_##_name);
2636
2637 #define SE_HBA_ATTR_RO(_name)                                   \
2638 static struct target_core_hba_attribute                         \
2639                 target_core_hba_##_name =                       \
2640                 __CONFIGFS_EATTR_RO(_name,                      \
2641                 target_core_hba_show_attr_##_name);
2642
2643 static ssize_t target_core_hba_show_attr_hba_info(
2644         struct se_hba *hba,
2645         char *page)
2646 {
2647         return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2648                         hba->hba_id, hba->transport->name,
2649                         TARGET_CORE_CONFIGFS_VERSION);
2650 }
2651
2652 SE_HBA_ATTR_RO(hba_info);
2653
2654 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2655                                 char *page)
2656 {
2657         int hba_mode = 0;
2658
2659         if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2660                 hba_mode = 1;
2661
2662         return sprintf(page, "%d\n", hba_mode);
2663 }
2664
2665 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2666                                 const char *page, size_t count)
2667 {
2668         struct se_subsystem_api *transport = hba->transport;
2669         unsigned long mode_flag;
2670         int ret;
2671
2672         if (transport->pmode_enable_hba == NULL)
2673                 return -EINVAL;
2674
2675         ret = strict_strtoul(page, 0, &mode_flag);
2676         if (ret < 0) {
2677                 pr_err("Unable to extract hba mode flag: %d\n", ret);
2678                 return -EINVAL;
2679         }
2680
2681         if (hba->dev_count) {
2682                 pr_err("Unable to set hba_mode with active devices\n");
2683                 return -EINVAL;
2684         }
2685
2686         ret = transport->pmode_enable_hba(hba, mode_flag);
2687         if (ret < 0)
2688                 return -EINVAL;
2689         if (ret > 0)
2690                 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2691         else if (ret == 0)
2692                 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2693
2694         return count;
2695 }
2696
2697 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2698
2699 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2700
2701 static void target_core_hba_release(struct config_item *item)
2702 {
2703         struct se_hba *hba = container_of(to_config_group(item),
2704                                 struct se_hba, hba_group);
2705         core_delete_hba(hba);
2706 }
2707
2708 static struct configfs_attribute *target_core_hba_attrs[] = {
2709         &target_core_hba_hba_info.attr,
2710         &target_core_hba_hba_mode.attr,
2711         NULL,
2712 };
2713
2714 static struct configfs_item_operations target_core_hba_item_ops = {
2715         .release                = target_core_hba_release,
2716         .show_attribute         = target_core_hba_attr_show,
2717         .store_attribute        = target_core_hba_attr_store,
2718 };
2719
2720 static struct config_item_type target_core_hba_cit = {
2721         .ct_item_ops            = &target_core_hba_item_ops,
2722         .ct_group_ops           = &target_core_hba_group_ops,
2723         .ct_attrs               = target_core_hba_attrs,
2724         .ct_owner               = THIS_MODULE,
2725 };
2726
2727 static struct config_group *target_core_call_addhbatotarget(
2728         struct config_group *group,
2729         const char *name)
2730 {
2731         char *se_plugin_str, *str, *str2;
2732         struct se_hba *hba;
2733         char buf[TARGET_CORE_NAME_MAX_LEN];
2734         unsigned long plugin_dep_id = 0;
2735         int ret;
2736
2737         memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
2738         if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
2739                 pr_err("Passed *name strlen(): %d exceeds"
2740                         " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
2741                         TARGET_CORE_NAME_MAX_LEN);
2742                 return ERR_PTR(-ENAMETOOLONG);
2743         }
2744         snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
2745
2746         str = strstr(buf, "_");
2747         if (!str) {
2748                 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
2749                 return ERR_PTR(-EINVAL);
2750         }
2751         se_plugin_str = buf;
2752         /*
2753          * Special case for subsystem plugins that have "_" in their names.
2754          * Namely rd_direct and rd_mcp..
2755          */
2756         str2 = strstr(str+1, "_");
2757         if (str2) {
2758                 *str2 = '\0'; /* Terminate for *se_plugin_str */
2759                 str2++; /* Skip to start of plugin dependent ID */
2760                 str = str2;
2761         } else {
2762                 *str = '\0'; /* Terminate for *se_plugin_str */
2763                 str++; /* Skip to start of plugin dependent ID */
2764         }
2765
2766         ret = strict_strtoul(str, 0, &plugin_dep_id);
2767         if (ret < 0) {
2768                 pr_err("strict_strtoul() returned %d for"
2769                                 " plugin_dep_id\n", ret);
2770                 return ERR_PTR(-EINVAL);
2771         }
2772         /*
2773          * Load up TCM subsystem plugins if they have not already been loaded.
2774          */
2775         transport_subsystem_check_init();
2776
2777         hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
2778         if (IS_ERR(hba))
2779                 return ERR_CAST(hba);
2780
2781         config_group_init_type_name(&hba->hba_group, name,
2782                         &target_core_hba_cit);
2783
2784         return &hba->hba_group;
2785 }
2786
2787 static void target_core_call_delhbafromtarget(
2788         struct config_group *group,
2789         struct config_item *item)
2790 {
2791         /*
2792          * core_delete_hba() is called from target_core_hba_item_ops->release()
2793          * -> target_core_hba_release()
2794          */
2795         config_item_put(item);
2796 }
2797
2798 static struct configfs_group_operations target_core_group_ops = {
2799         .make_group     = target_core_call_addhbatotarget,
2800         .drop_item      = target_core_call_delhbafromtarget,
2801 };
2802
2803 static struct config_item_type target_core_cit = {
2804         .ct_item_ops    = NULL,
2805         .ct_group_ops   = &target_core_group_ops,
2806         .ct_attrs       = NULL,
2807         .ct_owner       = THIS_MODULE,
2808 };
2809
2810 /* Stop functions for struct config_item_type target_core_hba_cit */
2811
2812 static int __init target_core_init_configfs(void)
2813 {
2814         struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
2815         struct config_group *lu_gp_cg = NULL;
2816         struct configfs_subsystem *subsys;
2817         struct t10_alua_lu_gp *lu_gp;
2818         int ret;
2819
2820         pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
2821                 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
2822                 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
2823
2824         subsys = target_core_subsystem[0];
2825         config_group_init(&subsys->su_group);
2826         mutex_init(&subsys->su_mutex);
2827
2828         ret = init_se_kmem_caches();
2829         if (ret < 0)
2830                 return ret;
2831         /*
2832          * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
2833          * and ALUA Logical Unit Group and Target Port Group infrastructure.
2834          */
2835         target_cg = &subsys->su_group;
2836         target_cg->default_groups = kmalloc(sizeof(struct config_group) * 2,
2837                                 GFP_KERNEL);
2838         if (!target_cg->default_groups) {
2839                 pr_err("Unable to allocate target_cg->default_groups\n");
2840                 ret = -ENOMEM;
2841                 goto out_global;
2842         }
2843
2844         config_group_init_type_name(&target_core_hbagroup,
2845                         "core", &target_core_cit);
2846         target_cg->default_groups[0] = &target_core_hbagroup;
2847         target_cg->default_groups[1] = NULL;
2848         /*
2849          * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
2850          */
2851         hba_cg = &target_core_hbagroup;
2852         hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2853                                 GFP_KERNEL);
2854         if (!hba_cg->default_groups) {
2855                 pr_err("Unable to allocate hba_cg->default_groups\n");
2856                 ret = -ENOMEM;
2857                 goto out_global;
2858         }
2859         config_group_init_type_name(&alua_group,
2860                         "alua", &target_core_alua_cit);
2861         hba_cg->default_groups[0] = &alua_group;
2862         hba_cg->default_groups[1] = NULL;
2863         /*
2864          * Add ALUA Logical Unit Group and Target Port Group ConfigFS
2865          * groups under /sys/kernel/config/target/core/alua/
2866          */
2867         alua_cg = &alua_group;
2868         alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2869                         GFP_KERNEL);
2870         if (!alua_cg->default_groups) {
2871                 pr_err("Unable to allocate alua_cg->default_groups\n");
2872                 ret = -ENOMEM;
2873                 goto out_global;
2874         }
2875
2876         config_group_init_type_name(&alua_lu_gps_group,
2877                         "lu_gps", &target_core_alua_lu_gps_cit);
2878         alua_cg->default_groups[0] = &alua_lu_gps_group;
2879         alua_cg->default_groups[1] = NULL;
2880         /*
2881          * Add core/alua/lu_gps/default_lu_gp
2882          */
2883         lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
2884         if (IS_ERR(lu_gp)) {
2885                 ret = -ENOMEM;
2886                 goto out_global;
2887         }
2888
2889         lu_gp_cg = &alua_lu_gps_group;
2890         lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2891                         GFP_KERNEL);
2892         if (!lu_gp_cg->default_groups) {
2893                 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
2894                 ret = -ENOMEM;
2895                 goto out_global;
2896         }
2897
2898         config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
2899                                 &target_core_alua_lu_gp_cit);
2900         lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
2901         lu_gp_cg->default_groups[1] = NULL;
2902         default_lu_gp = lu_gp;
2903         /*
2904          * Register the target_core_mod subsystem with configfs.
2905          */
2906         ret = configfs_register_subsystem(subsys);
2907         if (ret < 0) {
2908                 pr_err("Error %d while registering subsystem %s\n",
2909                         ret, subsys->su_group.cg_item.ci_namebuf);
2910                 goto out_global;
2911         }
2912         pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
2913                 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
2914                 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
2915         /*
2916          * Register built-in RAMDISK subsystem logic for virtual LUN 0
2917          */
2918         ret = rd_module_init();
2919         if (ret < 0)
2920                 goto out;
2921
2922         ret = core_dev_setup_virtual_lun0();
2923         if (ret < 0)
2924                 goto out;
2925
2926         return 0;
2927
2928 out:
2929         configfs_unregister_subsystem(subsys);
2930         core_dev_release_virtual_lun0();
2931         rd_module_exit();
2932 out_global:
2933         if (default_lu_gp) {
2934                 core_alua_free_lu_gp(default_lu_gp);
2935                 default_lu_gp = NULL;
2936         }
2937         if (lu_gp_cg)
2938                 kfree(lu_gp_cg->default_groups);
2939         if (alua_cg)
2940                 kfree(alua_cg->default_groups);
2941         if (hba_cg)
2942                 kfree(hba_cg->default_groups);
2943         kfree(target_cg->default_groups);
2944         release_se_kmem_caches();
2945         return ret;
2946 }
2947
2948 static void __exit target_core_exit_configfs(void)
2949 {
2950         struct configfs_subsystem *subsys;
2951         struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
2952         struct config_item *item;
2953         int i;
2954
2955         subsys = target_core_subsystem[0];
2956
2957         lu_gp_cg = &alua_lu_gps_group;
2958         for (i = 0; lu_gp_cg->default_groups[i]; i++) {
2959                 item = &lu_gp_cg->default_groups[i]->cg_item;
2960                 lu_gp_cg->default_groups[i] = NULL;
2961                 config_item_put(item);
2962         }
2963         kfree(lu_gp_cg->default_groups);
2964         lu_gp_cg->default_groups = NULL;
2965
2966         alua_cg = &alua_group;
2967         for (i = 0; alua_cg->default_groups[i]; i++) {
2968                 item = &alua_cg->default_groups[i]->cg_item;
2969                 alua_cg->default_groups[i] = NULL;
2970                 config_item_put(item);
2971         }
2972         kfree(alua_cg->default_groups);
2973         alua_cg->default_groups = NULL;
2974
2975         hba_cg = &target_core_hbagroup;
2976         for (i = 0; hba_cg->default_groups[i]; i++) {
2977                 item = &hba_cg->default_groups[i]->cg_item;
2978                 hba_cg->default_groups[i] = NULL;
2979                 config_item_put(item);
2980         }
2981         kfree(hba_cg->default_groups);
2982         hba_cg->default_groups = NULL;
2983         /*
2984          * We expect subsys->su_group.default_groups to be released
2985          * by configfs subsystem provider logic..
2986          */
2987         configfs_unregister_subsystem(subsys);
2988         kfree(subsys->su_group.default_groups);
2989
2990         core_alua_free_lu_gp(default_lu_gp);
2991         default_lu_gp = NULL;
2992
2993         pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
2994                         " Infrastructure\n");
2995
2996         core_dev_release_virtual_lun0();
2997         rd_module_exit();
2998         release_se_kmem_caches();
2999 }
3000
3001 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3002 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3003 MODULE_LICENSE("GPL");
3004
3005 module_init(target_core_init_configfs);
3006 module_exit(target_core_exit_configfs);