linux/drivers/target/target_core_configfs.c
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   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
  52extern struct t10_alua_lu_gp *default_lu_gp;
  53
  54static LIST_HEAD(g_tf_list);
  55static DEFINE_MUTEX(g_tf_lock);
  56
  57struct 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
  63static struct config_group target_core_hbagroup;
  64static struct config_group alua_group;
  65static struct config_group alua_lu_gps_group;
  66
  67static inline struct se_hba *
  68item_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 */
  76static 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
  85static struct configfs_item_operations target_core_fabric_item_ops = {
  86        .show_attribute = target_core_attr_show,
  87};
  88
  89static struct configfs_attribute target_core_item_attr_version = {
  90        .ca_owner       = THIS_MODULE,
  91        .ca_name        = "version",
  92        .ca_mode        = S_IRUGO,
  93};
  94
  95static 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 */
 119static 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 */
 206static 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
 239static 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 */
 247static 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 */
 255static 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
 262static 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
 271static 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 */
 288struct 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}
 330EXPORT_SYMBOL(target_fabric_configfs_init);
 331
 332/*
 333 * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
 334 */
 335void 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}
 344EXPORT_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 */
 350static 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 */
 492int 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}
 515EXPORT_SYMBOL(target_fabric_configfs_register);
 516
 517void 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}
 554EXPORT_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)                                      \
 563static 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)                                     \
 572static 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)                                           \
 592DEF_DEV_ATTRIB_SHOW(_name);                                             \
 593DEF_DEV_ATTRIB_STORE(_name);
 594
 595#define DEF_DEV_ATTRIB_RO(_name)                                        \
 596DEF_DEV_ATTRIB_SHOW(_name);
 597
 598CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
 599#define SE_DEV_ATTR(_name, _mode)                                       \
 600static 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);                                          \
 607static 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
 612DEF_DEV_ATTRIB(emulate_model_alias);
 613SE_DEV_ATTR(emulate_model_alias, S_IRUGO | S_IWUSR);
 614
 615DEF_DEV_ATTRIB(emulate_dpo);
 616SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
 617
 618DEF_DEV_ATTRIB(emulate_fua_write);
 619SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
 620
 621DEF_DEV_ATTRIB(emulate_fua_read);
 622SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
 623
 624DEF_DEV_ATTRIB(emulate_write_cache);
 625SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
 626
 627DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
 628SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
 629
 630DEF_DEV_ATTRIB(emulate_tas);
 631SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
 632
 633DEF_DEV_ATTRIB(emulate_tpu);
 634SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
 635
 636DEF_DEV_ATTRIB(emulate_tpws);
 637SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
 638
 639DEF_DEV_ATTRIB(enforce_pr_isids);
 640SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
 641
 642DEF_DEV_ATTRIB(is_nonrot);
 643SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
 644
 645DEF_DEV_ATTRIB(emulate_rest_reord);
 646SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
 647
 648DEF_DEV_ATTRIB_RO(hw_block_size);
 649SE_DEV_ATTR_RO(hw_block_size);
 650
 651DEF_DEV_ATTRIB(block_size);
 652SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
 653
 654DEF_DEV_ATTRIB_RO(hw_max_sectors);
 655SE_DEV_ATTR_RO(hw_max_sectors);
 656
 657DEF_DEV_ATTRIB(fabric_max_sectors);
 658SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR);
 659
 660DEF_DEV_ATTRIB(optimal_sectors);
 661SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
 662
 663DEF_DEV_ATTRIB_RO(hw_queue_depth);
 664SE_DEV_ATTR_RO(hw_queue_depth);
 665
 666DEF_DEV_ATTRIB(queue_depth);
 667SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
 668
 669DEF_DEV_ATTRIB(max_unmap_lba_count);
 670SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
 671
 672DEF_DEV_ATTRIB(max_unmap_block_desc_count);
 673SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
 674
 675DEF_DEV_ATTRIB(unmap_granularity);
 676SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
 677
 678DEF_DEV_ATTRIB(unmap_granularity_alignment);
 679SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
 680
 681DEF_DEV_ATTRIB(max_write_same_len);
 682SE_DEV_ATTR(max_write_same_len, S_IRUGO | S_IWUSR);
 683
 684CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
 685
 686static 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
 714static 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
 719static 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
 729CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
 730#define SE_DEV_WWN_ATTR(_name, _mode)                                   \
 731static 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);                                      \
 737do {                                                                    \
 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 */
 747static 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
 755static 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
 815SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
 816
 817/*
 818 * VPD page 0x83 Protocol Identifier
 819 */
 820static 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
 847static 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
 855SE_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)                           \
 861static 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 */
 900DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
 901
 902static 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
 910SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
 911
 912/*
 913 * VPD page 0x83 Association: Target Port
 914 */
 915DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
 916
 917static 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
 925SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
 926
 927/*
 928 * VPD page 0x83 Association: SCSI Target Device
 929 */
 930DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
 931
 932static 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
 940SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
 941
 942CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
 943
 944static 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
 953static 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
 958static 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
 968CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
 969#define SE_DEV_PR_ATTR(_name, _mode)                                    \
 970static 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);                                       \
 976static 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
 980static 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
1003static 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
1021static 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
1038SE_DEV_PR_ATTR_RO(res_holder);
1039
1040static 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
1060SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1061
1062static 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
1068SE_DEV_PR_ATTR_RO(res_pr_generation);
1069
1070/*
1071 * res_pr_holder_tg_port
1072 */
1073static 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
1104out_unlock:
1105        spin_unlock(&dev->dev_reservation_lock);
1106        return len;
1107}
1108
1109SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1110
1111static 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
1152SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1153
1154static 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
1173SE_DEV_PR_ATTR_RO(res_pr_type);
1174
1175static 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
1186SE_DEV_PR_ATTR_RO(res_type);
1187
1188static 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
1198SE_DEV_PR_ATTR_RO(res_aptpl_active);
1199
1200/*
1201 * res_aptpl_metadata
1202 */
1203static 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
1212enum {
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
1219static 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
1237static 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);
1404out:
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
1414SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1415
1416CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
1417
1418static 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
1431static 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
1436static 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
1446static 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
1459static 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
1467static 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
1478static 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
1486static 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
1496static 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
1528static 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
1536static 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
1546static 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
1579static 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
1587static ssize_t target_core_show_dev_enable(void *p, char *page)
1588{
1589        struct se_device *dev = p;
1590
1591        return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1592}
1593
1594static ssize_t target_core_store_dev_enable(
1595        void *p,
1596        const char *page,
1597        size_t count)
1598{
1599        struct se_device *dev = p;
1600        char *ptr;
1601        int ret;
1602
1603        ptr = strstr(page, "1");
1604        if (!ptr) {
1605                pr_err("For dev_enable ops, only valid value"
1606                                " is \"1\"\n");
1607                return -EINVAL;
1608        }
1609
1610        ret = target_configure_device(dev);
1611        if (ret)
1612                return ret;
1613        return count;
1614}
1615
1616static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1617        .attr   = { .ca_owner = THIS_MODULE,
1618                    .ca_name = "enable",
1619                    .ca_mode =  S_IRUGO | S_IWUSR },
1620        .show   = target_core_show_dev_enable,
1621        .store  = target_core_store_dev_enable,
1622};
1623
1624static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1625{
1626        struct se_device *dev = p;
1627        struct config_item *lu_ci;
1628        struct t10_alua_lu_gp *lu_gp;
1629        struct t10_alua_lu_gp_member *lu_gp_mem;
1630        ssize_t len = 0;
1631
1632        lu_gp_mem = dev->dev_alua_lu_gp_mem;
1633        if (!lu_gp_mem)
1634                return 0;
1635
1636        spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1637        lu_gp = lu_gp_mem->lu_gp;
1638        if (lu_gp) {
1639                lu_ci = &lu_gp->lu_gp_group.cg_item;
1640                len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1641                        config_item_name(lu_ci), lu_gp->lu_gp_id);
1642        }
1643        spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1644
1645        return len;
1646}
1647
1648static ssize_t target_core_store_alua_lu_gp(
1649        void *p,
1650        const char *page,
1651        size_t count)
1652{
1653        struct se_device *dev = p;
1654        struct se_hba *hba = dev->se_hba;
1655        struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1656        struct t10_alua_lu_gp_member *lu_gp_mem;
1657        unsigned char buf[LU_GROUP_NAME_BUF];
1658        int move = 0;
1659
1660        lu_gp_mem = dev->dev_alua_lu_gp_mem;
1661        if (!lu_gp_mem)
1662                return 0;
1663
1664        if (count > LU_GROUP_NAME_BUF) {
1665                pr_err("ALUA LU Group Alias too large!\n");
1666                return -EINVAL;
1667        }
1668        memset(buf, 0, LU_GROUP_NAME_BUF);
1669        memcpy(buf, page, count);
1670        /*
1671         * Any ALUA logical unit alias besides "NULL" means we will be
1672         * making a new group association.
1673         */
1674        if (strcmp(strstrip(buf), "NULL")) {
1675                /*
1676                 * core_alua_get_lu_gp_by_name() will increment reference to
1677                 * struct t10_alua_lu_gp.  This reference is released with
1678                 * core_alua_get_lu_gp_by_name below().
1679                 */
1680                lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1681                if (!lu_gp_new)
1682                        return -ENODEV;
1683        }
1684
1685        spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1686        lu_gp = lu_gp_mem->lu_gp;
1687        if (lu_gp) {
1688                /*
1689                 * Clearing an existing lu_gp association, and replacing
1690                 * with NULL
1691                 */
1692                if (!lu_gp_new) {
1693                        pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1694                                " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1695                                " %hu\n",
1696                                config_item_name(&hba->hba_group.cg_item),
1697                                config_item_name(&dev->dev_group.cg_item),
1698                                config_item_name(&lu_gp->lu_gp_group.cg_item),
1699                                lu_gp->lu_gp_id);
1700
1701                        __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1702                        spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1703
1704                        return count;
1705                }
1706                /*
1707                 * Removing existing association of lu_gp_mem with lu_gp
1708                 */
1709                __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1710                move = 1;
1711        }
1712        /*
1713         * Associate lu_gp_mem with lu_gp_new.
1714         */
1715        __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1716        spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1717
1718        pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1719                " core/alua/lu_gps/%s, ID: %hu\n",
1720                (move) ? "Moving" : "Adding",
1721                config_item_name(&hba->hba_group.cg_item),
1722                config_item_name(&dev->dev_group.cg_item),
1723                config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1724                lu_gp_new->lu_gp_id);
1725
1726        core_alua_put_lu_gp_from_name(lu_gp_new);
1727        return count;
1728}
1729
1730static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1731        .attr   = { .ca_owner = THIS_MODULE,
1732                    .ca_name = "alua_lu_gp",
1733                    .ca_mode = S_IRUGO | S_IWUSR },
1734        .show   = target_core_show_alua_lu_gp,
1735        .store  = target_core_store_alua_lu_gp,
1736};
1737
1738static struct configfs_attribute *lio_core_dev_attrs[] = {
1739        &target_core_attr_dev_info.attr,
1740        &target_core_attr_dev_control.attr,
1741        &target_core_attr_dev_alias.attr,
1742        &target_core_attr_dev_udev_path.attr,
1743        &target_core_attr_dev_enable.attr,
1744        &target_core_attr_dev_alua_lu_gp.attr,
1745        NULL,
1746};
1747
1748static void target_core_dev_release(struct config_item *item)
1749{
1750        struct config_group *dev_cg = to_config_group(item);
1751        struct se_device *dev =
1752                container_of(dev_cg, struct se_device, dev_group);
1753
1754        kfree(dev_cg->default_groups);
1755        target_free_device(dev);
1756}
1757
1758static ssize_t target_core_dev_show(struct config_item *item,
1759                                     struct configfs_attribute *attr,
1760                                     char *page)
1761{
1762        struct config_group *dev_cg = to_config_group(item);
1763        struct se_device *dev =
1764                container_of(dev_cg, struct se_device, dev_group);
1765        struct target_core_configfs_attribute *tc_attr = container_of(
1766                        attr, struct target_core_configfs_attribute, attr);
1767
1768        if (!tc_attr->show)
1769                return -EINVAL;
1770
1771        return tc_attr->show(dev, page);
1772}
1773
1774static ssize_t target_core_dev_store(struct config_item *item,
1775                                      struct configfs_attribute *attr,
1776                                      const char *page, size_t count)
1777{
1778        struct config_group *dev_cg = to_config_group(item);
1779        struct se_device *dev =
1780                container_of(dev_cg, struct se_device, dev_group);
1781        struct target_core_configfs_attribute *tc_attr = container_of(
1782                        attr, struct target_core_configfs_attribute, attr);
1783
1784        if (!tc_attr->store)
1785                return -EINVAL;
1786
1787        return tc_attr->store(dev, page, count);
1788}
1789
1790static struct configfs_item_operations target_core_dev_item_ops = {
1791        .release                = target_core_dev_release,
1792        .show_attribute         = target_core_dev_show,
1793        .store_attribute        = target_core_dev_store,
1794};
1795
1796static struct config_item_type target_core_dev_cit = {
1797        .ct_item_ops            = &target_core_dev_item_ops,
1798        .ct_attrs               = lio_core_dev_attrs,
1799        .ct_owner               = THIS_MODULE,
1800};
1801
1802/* End functions for struct config_item_type target_core_dev_cit */
1803
1804/* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
1805
1806CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
1807#define SE_DEV_ALUA_LU_ATTR(_name, _mode)                               \
1808static struct target_core_alua_lu_gp_attribute                          \
1809                        target_core_alua_lu_gp_##_name =                \
1810        __CONFIGFS_EATTR(_name, _mode,                                  \
1811        target_core_alua_lu_gp_show_attr_##_name,                       \
1812        target_core_alua_lu_gp_store_attr_##_name);
1813
1814#define SE_DEV_ALUA_LU_ATTR_RO(_name)                                   \
1815static struct target_core_alua_lu_gp_attribute                          \
1816                        target_core_alua_lu_gp_##_name =                \
1817        __CONFIGFS_EATTR_RO(_name,                                      \
1818        target_core_alua_lu_gp_show_attr_##_name);
1819
1820/*
1821 * lu_gp_id
1822 */
1823static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
1824        struct t10_alua_lu_gp *lu_gp,
1825        char *page)
1826{
1827        if (!lu_gp->lu_gp_valid_id)
1828                return 0;
1829
1830        return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
1831}
1832
1833static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
1834        struct t10_alua_lu_gp *lu_gp,
1835        const char *page,
1836        size_t count)
1837{
1838        struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
1839        unsigned long lu_gp_id;
1840        int ret;
1841
1842        ret = strict_strtoul(page, 0, &lu_gp_id);
1843        if (ret < 0) {
1844                pr_err("strict_strtoul() returned %d for"
1845                        " lu_gp_id\n", ret);
1846                return -EINVAL;
1847        }
1848        if (lu_gp_id > 0x0000ffff) {
1849                pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
1850                        " 0x0000ffff\n", lu_gp_id);
1851                return -EINVAL;
1852        }
1853
1854        ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
1855        if (ret < 0)
1856                return -EINVAL;
1857
1858        pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
1859                " Group: core/alua/lu_gps/%s to ID: %hu\n",
1860                config_item_name(&alua_lu_gp_cg->cg_item),
1861                lu_gp->lu_gp_id);
1862
1863        return count;
1864}
1865
1866SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
1867
1868/*
1869 * members
1870 */
1871static ssize_t target_core_alua_lu_gp_show_attr_members(
1872        struct t10_alua_lu_gp *lu_gp,
1873        char *page)
1874{
1875        struct se_device *dev;
1876        struct se_hba *hba;
1877        struct t10_alua_lu_gp_member *lu_gp_mem;
1878        ssize_t len = 0, cur_len;
1879        unsigned char buf[LU_GROUP_NAME_BUF];
1880
1881        memset(buf, 0, LU_GROUP_NAME_BUF);
1882
1883        spin_lock(&lu_gp->lu_gp_lock);
1884        list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
1885                dev = lu_gp_mem->lu_gp_mem_dev;
1886                hba = dev->se_hba;
1887
1888                cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
1889                        config_item_name(&hba->hba_group.cg_item),
1890                        config_item_name(&dev->dev_group.cg_item));
1891                cur_len++; /* Extra byte for NULL terminator */
1892
1893                if ((cur_len + len) > PAGE_SIZE) {
1894                        pr_warn("Ran out of lu_gp_show_attr"
1895                                "_members buffer\n");
1896                        break;
1897                }
1898                memcpy(page+len, buf, cur_len);
1899                len += cur_len;
1900        }
1901        spin_unlock(&lu_gp->lu_gp_lock);
1902
1903        return len;
1904}
1905
1906SE_DEV_ALUA_LU_ATTR_RO(members);
1907
1908CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
1909
1910static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
1911        &target_core_alua_lu_gp_lu_gp_id.attr,
1912        &target_core_alua_lu_gp_members.attr,
1913        NULL,
1914};
1915
1916static void target_core_alua_lu_gp_release(struct config_item *item)
1917{
1918        struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1919                        struct t10_alua_lu_gp, lu_gp_group);
1920
1921        core_alua_free_lu_gp(lu_gp);
1922}
1923
1924static struct configfs_item_operations target_core_alua_lu_gp_ops = {
1925        .release                = target_core_alua_lu_gp_release,
1926        .show_attribute         = target_core_alua_lu_gp_attr_show,
1927        .store_attribute        = target_core_alua_lu_gp_attr_store,
1928};
1929
1930static struct config_item_type target_core_alua_lu_gp_cit = {
1931        .ct_item_ops            = &target_core_alua_lu_gp_ops,
1932        .ct_attrs               = target_core_alua_lu_gp_attrs,
1933        .ct_owner               = THIS_MODULE,
1934};
1935
1936/* End functions for struct config_item_type target_core_alua_lu_gp_cit */
1937
1938/* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
1939
1940static struct config_group *target_core_alua_create_lu_gp(
1941        struct config_group *group,
1942        const char *name)
1943{
1944        struct t10_alua_lu_gp *lu_gp;
1945        struct config_group *alua_lu_gp_cg = NULL;
1946        struct config_item *alua_lu_gp_ci = NULL;
1947
1948        lu_gp = core_alua_allocate_lu_gp(name, 0);
1949        if (IS_ERR(lu_gp))
1950                return NULL;
1951
1952        alua_lu_gp_cg = &lu_gp->lu_gp_group;
1953        alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
1954
1955        config_group_init_type_name(alua_lu_gp_cg, name,
1956                        &target_core_alua_lu_gp_cit);
1957
1958        pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
1959                " Group: core/alua/lu_gps/%s\n",
1960                config_item_name(alua_lu_gp_ci));
1961
1962        return alua_lu_gp_cg;
1963
1964}
1965
1966static void target_core_alua_drop_lu_gp(
1967        struct config_group *group,
1968        struct config_item *item)
1969{
1970        struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1971                        struct t10_alua_lu_gp, lu_gp_group);
1972
1973        pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
1974                " Group: core/alua/lu_gps/%s, ID: %hu\n",
1975                config_item_name(item), lu_gp->lu_gp_id);
1976        /*
1977         * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
1978         * -> target_core_alua_lu_gp_release()
1979         */
1980        config_item_put(item);
1981}
1982
1983static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
1984        .make_group             = &target_core_alua_create_lu_gp,
1985        .drop_item              = &target_core_alua_drop_lu_gp,
1986};
1987
1988static struct config_item_type target_core_alua_lu_gps_cit = {
1989        .ct_item_ops            = NULL,
1990        .ct_group_ops           = &target_core_alua_lu_gps_group_ops,
1991        .ct_owner               = THIS_MODULE,
1992};
1993
1994/* End functions for struct config_item_type target_core_alua_lu_gps_cit */
1995
1996/* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
1997
1998CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
1999#define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode)                            \
2000static struct target_core_alua_tg_pt_gp_attribute                       \
2001                        target_core_alua_tg_pt_gp_##_name =             \
2002        __CONFIGFS_EATTR(_name, _mode,                                  \
2003        target_core_alua_tg_pt_gp_show_attr_##_name,                    \
2004        target_core_alua_tg_pt_gp_store_attr_##_name);
2005
2006#define SE_DEV_ALUA_TG_PT_ATTR_RO(_name)                                \
2007static struct target_core_alua_tg_pt_gp_attribute                       \
2008                        target_core_alua_tg_pt_gp_##_name =             \
2009        __CONFIGFS_EATTR_RO(_name,                                      \
2010        target_core_alua_tg_pt_gp_show_attr_##_name);
2011
2012/*
2013 * alua_access_state
2014 */
2015static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2016        struct t10_alua_tg_pt_gp *tg_pt_gp,
2017        char *page)
2018{
2019        return sprintf(page, "%d\n",
2020                atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2021}
2022
2023static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2024        struct t10_alua_tg_pt_gp *tg_pt_gp,
2025        const char *page,
2026        size_t count)
2027{
2028        struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2029        unsigned long tmp;
2030        int new_state, ret;
2031
2032        if (!tg_pt_gp->tg_pt_gp_valid_id) {
2033                pr_err("Unable to do implict ALUA on non valid"
2034                        " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2035                return -EINVAL;
2036        }
2037
2038        ret = strict_strtoul(page, 0, &tmp);
2039        if (ret < 0) {
2040                pr_err("Unable to extract new ALUA access state from"
2041                                " %s\n", page);
2042                return -EINVAL;
2043        }
2044        new_state = (int)tmp;
2045
2046        if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2047                pr_err("Unable to process implict configfs ALUA"
2048                        " transition while TPGS_IMPLICT_ALUA is disabled\n");
2049                return -EINVAL;
2050        }
2051
2052        ret = core_alua_do_port_transition(tg_pt_gp, dev,
2053                                        NULL, NULL, new_state, 0);
2054        return (!ret) ? count : -EINVAL;
2055}
2056
2057SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2058
2059/*
2060 * alua_access_status
2061 */
2062static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2063        struct t10_alua_tg_pt_gp *tg_pt_gp,
2064        char *page)
2065{
2066        return sprintf(page, "%s\n",
2067                core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2068}
2069
2070static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2071        struct t10_alua_tg_pt_gp *tg_pt_gp,
2072        const char *page,
2073        size_t count)
2074{
2075        unsigned long tmp;
2076        int new_status, ret;
2077
2078        if (!tg_pt_gp->tg_pt_gp_valid_id) {
2079                pr_err("Unable to do set ALUA access status on non"
2080                        " valid tg_pt_gp ID: %hu\n",
2081                        tg_pt_gp->tg_pt_gp_valid_id);
2082                return -EINVAL;
2083        }
2084
2085        ret = strict_strtoul(page, 0, &tmp);
2086        if (ret < 0) {
2087                pr_err("Unable to extract new ALUA access status"
2088                                " from %s\n", page);
2089                return -EINVAL;
2090        }
2091        new_status = (int)tmp;
2092
2093        if ((new_status != ALUA_STATUS_NONE) &&
2094            (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2095            (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2096                pr_err("Illegal ALUA access status: 0x%02x\n",
2097                                new_status);
2098                return -EINVAL;
2099        }
2100
2101        tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2102        return count;
2103}
2104
2105SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2106
2107/*
2108 * alua_access_type
2109 */
2110static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2111        struct t10_alua_tg_pt_gp *tg_pt_gp,
2112        char *page)
2113{
2114        return core_alua_show_access_type(tg_pt_gp, page);
2115}
2116
2117static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2118        struct t10_alua_tg_pt_gp *tg_pt_gp,
2119        const char *page,
2120        size_t count)
2121{
2122        return core_alua_store_access_type(tg_pt_gp, page, count);
2123}
2124
2125SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2126
2127/*
2128 * alua_write_metadata
2129 */
2130static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2131        struct t10_alua_tg_pt_gp *tg_pt_gp,
2132        char *page)
2133{
2134        return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2135}
2136
2137static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2138        struct t10_alua_tg_pt_gp *tg_pt_gp,
2139        const char *page,
2140        size_t count)
2141{
2142        unsigned long tmp;
2143        int ret;
2144
2145        ret = strict_strtoul(page, 0, &tmp);
2146        if (ret < 0) {
2147                pr_err("Unable to extract alua_write_metadata\n");
2148                return -EINVAL;
2149        }
2150
2151        if ((tmp != 0) && (tmp != 1)) {
2152                pr_err("Illegal value for alua_write_metadata:"
2153                        " %lu\n", tmp);
2154                return -EINVAL;
2155        }
2156        tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2157
2158        return count;
2159}
2160
2161SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2162
2163
2164
2165/*
2166 * nonop_delay_msecs
2167 */
2168static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2169        struct t10_alua_tg_pt_gp *tg_pt_gp,
2170        char *page)
2171{
2172        return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2173
2174}
2175
2176static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2177        struct t10_alua_tg_pt_gp *tg_pt_gp,
2178        const char *page,
2179        size_t count)
2180{
2181        return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2182}
2183
2184SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2185
2186/*
2187 * trans_delay_msecs
2188 */
2189static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2190        struct t10_alua_tg_pt_gp *tg_pt_gp,
2191        char *page)
2192{
2193        return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2194}
2195
2196static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2197        struct t10_alua_tg_pt_gp *tg_pt_gp,
2198        const char *page,
2199        size_t count)
2200{
2201        return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2202}
2203
2204SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2205
2206/*
2207 * implict_trans_secs
2208 */
2209static ssize_t target_core_alua_tg_pt_gp_show_attr_implict_trans_secs(
2210        struct t10_alua_tg_pt_gp *tg_pt_gp,
2211        char *page)
2212{
2213        return core_alua_show_implict_trans_secs(tg_pt_gp, page);
2214}
2215
2216static ssize_t target_core_alua_tg_pt_gp_store_attr_implict_trans_secs(
2217        struct t10_alua_tg_pt_gp *tg_pt_gp,
2218        const char *page,
2219        size_t count)
2220{
2221        return core_alua_store_implict_trans_secs(tg_pt_gp, page, count);
2222}
2223
2224SE_DEV_ALUA_TG_PT_ATTR(implict_trans_secs, S_IRUGO | S_IWUSR);
2225
2226/*
2227 * preferred
2228 */
2229
2230static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2231        struct t10_alua_tg_pt_gp *tg_pt_gp,
2232        char *page)
2233{
2234        return core_alua_show_preferred_bit(tg_pt_gp, page);
2235}
2236
2237static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2238        struct t10_alua_tg_pt_gp *tg_pt_gp,
2239        const char *page,
2240        size_t count)
2241{
2242        return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2243}
2244
2245SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2246
2247/*
2248 * tg_pt_gp_id
2249 */
2250static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2251        struct t10_alua_tg_pt_gp *tg_pt_gp,
2252        char *page)
2253{
2254        if (!tg_pt_gp->tg_pt_gp_valid_id)
2255                return 0;
2256
2257        return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2258}
2259
2260static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2261        struct t10_alua_tg_pt_gp *tg_pt_gp,
2262        const char *page,
2263        size_t count)
2264{
2265        struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2266        unsigned long tg_pt_gp_id;
2267        int ret;
2268
2269        ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2270        if (ret < 0) {
2271                pr_err("strict_strtoul() returned %d for"
2272                        " tg_pt_gp_id\n", ret);
2273                return -EINVAL;
2274        }
2275        if (tg_pt_gp_id > 0x0000ffff) {
2276                pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2277                        " 0x0000ffff\n", tg_pt_gp_id);
2278                return -EINVAL;
2279        }
2280
2281        ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2282        if (ret < 0)
2283                return -EINVAL;
2284
2285        pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2286                "core/alua/tg_pt_gps/%s to ID: %hu\n",
2287                config_item_name(&alua_tg_pt_gp_cg->cg_item),
2288                tg_pt_gp->tg_pt_gp_id);
2289
2290        return count;
2291}
2292
2293SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2294
2295/*
2296 * members
2297 */
2298static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2299        struct t10_alua_tg_pt_gp *tg_pt_gp,
2300        char *page)
2301{
2302        struct se_port *port;
2303        struct se_portal_group *tpg;
2304        struct se_lun *lun;
2305        struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2306        ssize_t len = 0, cur_len;
2307        unsigned char buf[TG_PT_GROUP_NAME_BUF];
2308
2309        memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2310
2311        spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2312        list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2313                        tg_pt_gp_mem_list) {
2314                port = tg_pt_gp_mem->tg_pt;
2315                tpg = port->sep_tpg;
2316                lun = port->sep_lun;
2317
2318                cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2319                        "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2320                        tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2321                        tpg->se_tpg_tfo->tpg_get_tag(tpg),
2322                        config_item_name(&lun->lun_group.cg_item));
2323                cur_len++; /* Extra byte for NULL terminator */
2324
2325                if ((cur_len + len) > PAGE_SIZE) {
2326                        pr_warn("Ran out of lu_gp_show_attr"
2327                                "_members buffer\n");
2328                        break;
2329                }
2330                memcpy(page+len, buf, cur_len);
2331                len += cur_len;
2332        }
2333        spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2334
2335        return len;
2336}
2337
2338SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2339
2340CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2341                        tg_pt_gp_group);
2342
2343static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2344        &target_core_alua_tg_pt_gp_alua_access_state.attr,
2345        &target_core_alua_tg_pt_gp_alua_access_status.attr,
2346        &target_core_alua_tg_pt_gp_alua_access_type.attr,
2347        &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2348        &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2349        &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2350        &target_core_alua_tg_pt_gp_implict_trans_secs.attr,
2351        &target_core_alua_tg_pt_gp_preferred.attr,
2352        &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2353        &target_core_alua_tg_pt_gp_members.attr,
2354        NULL,
2355};
2356
2357static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2358{
2359        struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2360                        struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2361
2362        core_alua_free_tg_pt_gp(tg_pt_gp);
2363}
2364
2365static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2366        .release                = target_core_alua_tg_pt_gp_release,
2367        .show_attribute         = target_core_alua_tg_pt_gp_attr_show,
2368        .store_attribute        = target_core_alua_tg_pt_gp_attr_store,
2369};
2370
2371static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2372        .ct_item_ops            = &target_core_alua_tg_pt_gp_ops,
2373        .ct_attrs               = target_core_alua_tg_pt_gp_attrs,
2374        .ct_owner               = THIS_MODULE,
2375};
2376
2377/* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2378
2379/* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2380
2381static struct config_group *target_core_alua_create_tg_pt_gp(
2382        struct config_group *group,
2383        const char *name)
2384{
2385        struct t10_alua *alua = container_of(group, struct t10_alua,
2386                                        alua_tg_pt_gps_group);
2387        struct t10_alua_tg_pt_gp *tg_pt_gp;
2388        struct config_group *alua_tg_pt_gp_cg = NULL;
2389        struct config_item *alua_tg_pt_gp_ci = NULL;
2390
2391        tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2392        if (!tg_pt_gp)
2393                return NULL;
2394
2395        alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2396        alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2397
2398        config_group_init_type_name(alua_tg_pt_gp_cg, name,
2399                        &target_core_alua_tg_pt_gp_cit);
2400
2401        pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2402                " Group: alua/tg_pt_gps/%s\n",
2403                config_item_name(alua_tg_pt_gp_ci));
2404
2405        return alua_tg_pt_gp_cg;
2406}
2407
2408static void target_core_alua_drop_tg_pt_gp(
2409        struct config_group *group,
2410        struct config_item *item)
2411{
2412        struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2413                        struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2414
2415        pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2416                " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2417                config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2418        /*
2419         * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2420         * -> target_core_alua_tg_pt_gp_release().
2421         */
2422        config_item_put(item);
2423}
2424
2425static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2426        .make_group             = &target_core_alua_create_tg_pt_gp,
2427        .drop_item              = &target_core_alua_drop_tg_pt_gp,
2428};
2429
2430static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2431        .ct_group_ops           = &target_core_alua_tg_pt_gps_group_ops,
2432        .ct_owner               = THIS_MODULE,
2433};
2434
2435/* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2436
2437/* Start functions for struct config_item_type target_core_alua_cit */
2438
2439/*
2440 * target_core_alua_cit is a ConfigFS group that lives under
2441 * /sys/kernel/config/target/core/alua.  There are default groups
2442 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2443 * target_core_alua_cit in target_core_init_configfs() below.
2444 */
2445static struct config_item_type target_core_alua_cit = {
2446        .ct_item_ops            = NULL,
2447        .ct_attrs               = NULL,
2448        .ct_owner               = THIS_MODULE,
2449};
2450
2451/* End functions for struct config_item_type target_core_alua_cit */
2452
2453/* Start functions for struct config_item_type target_core_stat_cit */
2454
2455static struct config_group *target_core_stat_mkdir(
2456        struct config_group *group,
2457        const char *name)
2458{
2459        return ERR_PTR(-ENOSYS);
2460}
2461
2462static void target_core_stat_rmdir(
2463        struct config_group *group,
2464        struct config_item *item)
2465{
2466        return;
2467}
2468
2469static struct configfs_group_operations target_core_stat_group_ops = {
2470        .make_group             = &target_core_stat_mkdir,
2471        .drop_item              = &target_core_stat_rmdir,
2472};
2473
2474static struct config_item_type target_core_stat_cit = {
2475        .ct_group_ops           = &target_core_stat_group_ops,
2476        .ct_owner               = THIS_MODULE,
2477};
2478
2479/* End functions for struct config_item_type target_core_stat_cit */
2480
2481/* Start functions for struct config_item_type target_core_hba_cit */
2482
2483static struct config_group *target_core_make_subdev(
2484        struct config_group *group,
2485        const char *name)
2486{
2487        struct t10_alua_tg_pt_gp *tg_pt_gp;
2488        struct se_subsystem_api *t;
2489        struct config_item *hba_ci = &group->cg_item;
2490        struct se_hba *hba = item_to_hba(hba_ci);
2491        struct se_device *dev;
2492        struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2493        struct config_group *dev_stat_grp = NULL;
2494        int errno = -ENOMEM, ret;
2495
2496        ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2497        if (ret)
2498                return ERR_PTR(ret);
2499        /*
2500         * Locate the struct se_subsystem_api from parent's struct se_hba.
2501         */
2502        t = hba->transport;
2503
2504        dev = target_alloc_device(hba, name);
2505        if (!dev)
2506                goto out_unlock;
2507
2508        dev_cg = &dev->dev_group;
2509
2510        dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
2511                        GFP_KERNEL);
2512        if (!dev_cg->default_groups)
2513                goto out_free_device;
2514
2515        config_group_init_type_name(dev_cg, name, &target_core_dev_cit);
2516        config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2517                        &target_core_dev_attrib_cit);
2518        config_group_init_type_name(&dev->dev_pr_group, "pr",
2519                        &target_core_dev_pr_cit);
2520        config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2521                        &target_core_dev_wwn_cit);
2522        config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2523                        "alua", &target_core_alua_tg_pt_gps_cit);
2524        config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2525                        "statistics", &target_core_stat_cit);
2526
2527        dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
2528        dev_cg->default_groups[1] = &dev->dev_pr_group;
2529        dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
2530        dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
2531        dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
2532        dev_cg->default_groups[5] = NULL;
2533        /*
2534         * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2535         */
2536        tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2537        if (!tg_pt_gp)
2538                goto out_free_dev_cg_default_groups;
2539        dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2540
2541        tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2542        tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2543                                GFP_KERNEL);
2544        if (!tg_pt_gp_cg->default_groups) {
2545                pr_err("Unable to allocate tg_pt_gp_cg->"
2546                                "default_groups\n");
2547                goto out_free_tg_pt_gp;
2548        }
2549
2550        config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2551                        "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2552        tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2553        tg_pt_gp_cg->default_groups[1] = NULL;
2554        /*
2555         * Add core/$HBA/$DEV/statistics/ default groups
2556         */
2557        dev_stat_grp = &dev->dev_stat_grps.stat_group;
2558        dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
2559                                GFP_KERNEL);
2560        if (!dev_stat_grp->default_groups) {
2561                pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2562                goto out_free_tg_pt_gp_cg_default_groups;
2563        }
2564        target_stat_setup_dev_default_groups(dev);
2565
2566        mutex_unlock(&hba->hba_access_mutex);
2567        return dev_cg;
2568
2569out_free_tg_pt_gp_cg_default_groups:
2570        kfree(tg_pt_gp_cg->default_groups);
2571out_free_tg_pt_gp:
2572        core_alua_free_tg_pt_gp(tg_pt_gp);
2573out_free_dev_cg_default_groups:
2574        kfree(dev_cg->default_groups);
2575out_free_device:
2576        target_free_device(dev);
2577out_unlock:
2578        mutex_unlock(&hba->hba_access_mutex);
2579        return ERR_PTR(errno);
2580}
2581
2582static void target_core_drop_subdev(
2583        struct config_group *group,
2584        struct config_item *item)
2585{
2586        struct config_group *dev_cg = to_config_group(item);
2587        struct se_device *dev =
2588                container_of(dev_cg, struct se_device, dev_group);
2589        struct se_hba *hba;
2590        struct config_item *df_item;
2591        struct config_group *tg_pt_gp_cg, *dev_stat_grp;
2592        int i;
2593
2594        hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
2595
2596        mutex_lock(&hba->hba_access_mutex);
2597
2598        dev_stat_grp = &dev->dev_stat_grps.stat_group;
2599        for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2600                df_item = &dev_stat_grp->default_groups[i]->cg_item;
2601                dev_stat_grp->default_groups[i] = NULL;
2602                config_item_put(df_item);
2603        }
2604        kfree(dev_stat_grp->default_groups);
2605
2606        tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2607        for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2608                df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2609                tg_pt_gp_cg->default_groups[i] = NULL;
2610                config_item_put(df_item);
2611        }
2612        kfree(tg_pt_gp_cg->default_groups);
2613        /*
2614         * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2615         * directly from target_core_alua_tg_pt_gp_release().
2616         */
2617        dev->t10_alua.default_tg_pt_gp = NULL;
2618
2619        for (i = 0; dev_cg->default_groups[i]; i++) {
2620                df_item = &dev_cg->default_groups[i]->cg_item;
2621                dev_cg->default_groups[i] = NULL;
2622                config_item_put(df_item);
2623        }
2624        /*
2625         * se_dev is released from target_core_dev_item_ops->release()
2626         */
2627        config_item_put(item);
2628        mutex_unlock(&hba->hba_access_mutex);
2629}
2630
2631static struct configfs_group_operations target_core_hba_group_ops = {
2632        .make_group             = target_core_make_subdev,
2633        .drop_item              = target_core_drop_subdev,
2634};
2635
2636CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2637#define SE_HBA_ATTR(_name, _mode)                               \
2638static struct target_core_hba_attribute                         \
2639                target_core_hba_##_name =                       \
2640                __CONFIGFS_EATTR(_name, _mode,                  \
2641                target_core_hba_show_attr_##_name,              \
2642                target_core_hba_store_attr_##_name);
2643
2644#define SE_HBA_ATTR_RO(_name)                                   \
2645static struct target_core_hba_attribute                         \
2646                target_core_hba_##_name =                       \
2647                __CONFIGFS_EATTR_RO(_name,                      \
2648                target_core_hba_show_attr_##_name);
2649
2650static ssize_t target_core_hba_show_attr_hba_info(
2651        struct se_hba *hba,
2652        char *page)
2653{
2654        return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2655                        hba->hba_id, hba->transport->name,
2656                        TARGET_CORE_CONFIGFS_VERSION);
2657}
2658
2659SE_HBA_ATTR_RO(hba_info);
2660
2661static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2662                                char *page)
2663{
2664        int hba_mode = 0;
2665
2666        if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2667                hba_mode = 1;
2668
2669        return sprintf(page, "%d\n", hba_mode);
2670}
2671
2672static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2673                                const char *page, size_t count)
2674{
2675        struct se_subsystem_api *transport = hba->transport;
2676        unsigned long mode_flag;
2677        int ret;
2678
2679        if (transport->pmode_enable_hba == NULL)
2680                return -EINVAL;
2681
2682        ret = strict_strtoul(page, 0, &mode_flag);
2683        if (ret < 0) {
2684                pr_err("Unable to extract hba mode flag: %d\n", ret);
2685                return -EINVAL;
2686        }
2687
2688        if (hba->dev_count) {
2689                pr_err("Unable to set hba_mode with active devices\n");
2690                return -EINVAL;
2691        }
2692
2693        ret = transport->pmode_enable_hba(hba, mode_flag);
2694        if (ret < 0)
2695                return -EINVAL;
2696        if (ret > 0)
2697                hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2698        else if (ret == 0)
2699                hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2700
2701        return count;
2702}
2703
2704SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2705
2706CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2707
2708static void target_core_hba_release(struct config_item *item)
2709{
2710        struct se_hba *hba = container_of(to_config_group(item),
2711                                struct se_hba, hba_group);
2712        core_delete_hba(hba);
2713}
2714
2715static struct configfs_attribute *target_core_hba_attrs[] = {
2716        &target_core_hba_hba_info.attr,
2717        &target_core_hba_hba_mode.attr,
2718        NULL,
2719};
2720
2721static struct configfs_item_operations target_core_hba_item_ops = {
2722        .release                = target_core_hba_release,
2723        .show_attribute         = target_core_hba_attr_show,
2724        .store_attribute        = target_core_hba_attr_store,
2725};
2726
2727static struct config_item_type target_core_hba_cit = {
2728        .ct_item_ops            = &target_core_hba_item_ops,
2729        .ct_group_ops           = &target_core_hba_group_ops,
2730        .ct_attrs               = target_core_hba_attrs,
2731        .ct_owner               = THIS_MODULE,
2732};
2733
2734static struct config_group *target_core_call_addhbatotarget(
2735        struct config_group *group,
2736        const char *name)
2737{
2738        char *se_plugin_str, *str, *str2;
2739        struct se_hba *hba;
2740        char buf[TARGET_CORE_NAME_MAX_LEN];
2741        unsigned long plugin_dep_id = 0;
2742        int ret;
2743
2744        memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
2745        if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
2746                pr_err("Passed *name strlen(): %d exceeds"
2747                        " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
2748                        TARGET_CORE_NAME_MAX_LEN);
2749                return ERR_PTR(-ENAMETOOLONG);
2750        }
2751        snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
2752
2753        str = strstr(buf, "_");
2754        if (!str) {
2755                pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
2756                return ERR_PTR(-EINVAL);
2757        }
2758        se_plugin_str = buf;
2759        /*
2760         * Special case for subsystem plugins that have "_" in their names.
2761         * Namely rd_direct and rd_mcp..
2762         */
2763        str2 = strstr(str+1, "_");
2764        if (str2) {
2765                *str2 = '\0'; /* Terminate for *se_plugin_str */
2766                str2++; /* Skip to start of plugin dependent ID */
2767                str = str2;
2768        } else {
2769                *str = '\0'; /* Terminate for *se_plugin_str */
2770                str++; /* Skip to start of plugin dependent ID */
2771        }
2772
2773        ret = strict_strtoul(str, 0, &plugin_dep_id);
2774        if (ret < 0) {
2775                pr_err("strict_strtoul() returned %d for"
2776                                " plugin_dep_id\n", ret);
2777                return ERR_PTR(-EINVAL);
2778        }
2779        /*
2780         * Load up TCM subsystem plugins if they have not already been loaded.
2781         */
2782        transport_subsystem_check_init();
2783
2784        hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
2785        if (IS_ERR(hba))
2786                return ERR_CAST(hba);
2787
2788        config_group_init_type_name(&hba->hba_group, name,
2789                        &target_core_hba_cit);
2790
2791        return &hba->hba_group;
2792}
2793
2794static void target_core_call_delhbafromtarget(
2795        struct config_group *group,
2796        struct config_item *item)
2797{
2798        /*
2799         * core_delete_hba() is called from target_core_hba_item_ops->release()
2800         * -> target_core_hba_release()
2801         */
2802        config_item_put(item);
2803}
2804
2805static struct configfs_group_operations target_core_group_ops = {
2806        .make_group     = target_core_call_addhbatotarget,
2807        .drop_item      = target_core_call_delhbafromtarget,
2808};
2809
2810static struct config_item_type target_core_cit = {
2811        .ct_item_ops    = NULL,
2812        .ct_group_ops   = &target_core_group_ops,
2813        .ct_attrs       = NULL,
2814        .ct_owner       = THIS_MODULE,
2815};
2816
2817/* Stop functions for struct config_item_type target_core_hba_cit */
2818
2819static int __init target_core_init_configfs(void)
2820{
2821        struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
2822        struct config_group *lu_gp_cg = NULL;
2823        struct configfs_subsystem *subsys;
2824        struct t10_alua_lu_gp *lu_gp;
2825        int ret;
2826
2827        pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
2828                " Engine: %s on %s/%s on "UTS_RELEASE"\n",
2829                TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
2830
2831        subsys = target_core_subsystem[0];
2832        config_group_init(&subsys->su_group);
2833        mutex_init(&subsys->su_mutex);
2834
2835        ret = init_se_kmem_caches();
2836        if (ret < 0)
2837                return ret;
2838        /*
2839         * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
2840         * and ALUA Logical Unit Group and Target Port Group infrastructure.
2841         */
2842        target_cg = &subsys->su_group;
2843        target_cg->default_groups = kmalloc(sizeof(struct config_group) * 2,
2844                                GFP_KERNEL);
2845        if (!target_cg->default_groups) {
2846                pr_err("Unable to allocate target_cg->default_groups\n");
2847                ret = -ENOMEM;
2848                goto out_global;
2849        }
2850
2851        config_group_init_type_name(&target_core_hbagroup,
2852                        "core", &target_core_cit);
2853        target_cg->default_groups[0] = &target_core_hbagroup;
2854        target_cg->default_groups[1] = NULL;
2855        /*
2856         * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
2857         */
2858        hba_cg = &target_core_hbagroup;
2859        hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2860                                GFP_KERNEL);
2861        if (!hba_cg->default_groups) {
2862                pr_err("Unable to allocate hba_cg->default_groups\n");
2863                ret = -ENOMEM;
2864                goto out_global;
2865        }
2866        config_group_init_type_name(&alua_group,
2867                        "alua", &target_core_alua_cit);
2868        hba_cg->default_groups[0] = &alua_group;
2869        hba_cg->default_groups[1] = NULL;
2870        /*
2871         * Add ALUA Logical Unit Group and Target Port Group ConfigFS
2872         * groups under /sys/kernel/config/target/core/alua/
2873         */
2874        alua_cg = &alua_group;
2875        alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2876                        GFP_KERNEL);
2877        if (!alua_cg->default_groups) {
2878                pr_err("Unable to allocate alua_cg->default_groups\n");
2879                ret = -ENOMEM;
2880                goto out_global;
2881        }
2882
2883        config_group_init_type_name(&alua_lu_gps_group,
2884                        "lu_gps", &target_core_alua_lu_gps_cit);
2885        alua_cg->default_groups[0] = &alua_lu_gps_group;
2886        alua_cg->default_groups[1] = NULL;
2887        /*
2888         * Add core/alua/lu_gps/default_lu_gp
2889         */
2890        lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
2891        if (IS_ERR(lu_gp)) {
2892                ret = -ENOMEM;
2893                goto out_global;
2894        }
2895
2896        lu_gp_cg = &alua_lu_gps_group;
2897        lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2898                        GFP_KERNEL);
2899        if (!lu_gp_cg->default_groups) {
2900                pr_err("Unable to allocate lu_gp_cg->default_groups\n");
2901                ret = -ENOMEM;
2902                goto out_global;
2903        }
2904
2905        config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
2906                                &target_core_alua_lu_gp_cit);
2907        lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
2908        lu_gp_cg->default_groups[1] = NULL;
2909        default_lu_gp = lu_gp;
2910        /*
2911         * Register the target_core_mod subsystem with configfs.
2912         */
2913        ret = configfs_register_subsystem(subsys);
2914        if (ret < 0) {
2915                pr_err("Error %d while registering subsystem %s\n",
2916                        ret, subsys->su_group.cg_item.ci_namebuf);
2917                goto out_global;
2918        }
2919        pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
2920                " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
2921                " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
2922        /*
2923         * Register built-in RAMDISK subsystem logic for virtual LUN 0
2924         */
2925        ret = rd_module_init();
2926        if (ret < 0)
2927                goto out;
2928
2929        ret = core_dev_setup_virtual_lun0();
2930        if (ret < 0)
2931                goto out;
2932
2933        return 0;
2934
2935out:
2936        configfs_unregister_subsystem(subsys);
2937        core_dev_release_virtual_lun0();
2938        rd_module_exit();
2939out_global:
2940        if (default_lu_gp) {
2941                core_alua_free_lu_gp(default_lu_gp);
2942                default_lu_gp = NULL;
2943        }
2944        if (lu_gp_cg)
2945                kfree(lu_gp_cg->default_groups);
2946        if (alua_cg)
2947                kfree(alua_cg->default_groups);
2948        if (hba_cg)
2949                kfree(hba_cg->default_groups);
2950        kfree(target_cg->default_groups);
2951        release_se_kmem_caches();
2952        return ret;
2953}
2954
2955static void __exit target_core_exit_configfs(void)
2956{
2957        struct configfs_subsystem *subsys;
2958        struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
2959        struct config_item *item;
2960        int i;
2961
2962        subsys = target_core_subsystem[0];
2963
2964        lu_gp_cg = &alua_lu_gps_group;
2965        for (i = 0; lu_gp_cg->default_groups[i]; i++) {
2966                item = &lu_gp_cg->default_groups[i]->cg_item;
2967                lu_gp_cg->default_groups[i] = NULL;
2968                config_item_put(item);
2969        }
2970        kfree(lu_gp_cg->default_groups);
2971        lu_gp_cg->default_groups = NULL;
2972
2973        alua_cg = &alua_group;
2974        for (i = 0; alua_cg->default_groups[i]; i++) {
2975                item = &alua_cg->default_groups[i]->cg_item;
2976                alua_cg->default_groups[i] = NULL;
2977                config_item_put(item);
2978        }
2979        kfree(alua_cg->default_groups);
2980        alua_cg->default_groups = NULL;
2981
2982        hba_cg = &target_core_hbagroup;
2983        for (i = 0; hba_cg->default_groups[i]; i++) {
2984                item = &hba_cg->default_groups[i]->cg_item;
2985                hba_cg->default_groups[i] = NULL;
2986                config_item_put(item);
2987        }
2988        kfree(hba_cg->default_groups);
2989        hba_cg->default_groups = NULL;
2990        /*
2991         * We expect subsys->su_group.default_groups to be released
2992         * by configfs subsystem provider logic..
2993         */
2994        configfs_unregister_subsystem(subsys);
2995        kfree(subsys->su_group.default_groups);
2996
2997        core_alua_free_lu_gp(default_lu_gp);
2998        default_lu_gp = NULL;
2999
3000        pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3001                        " Infrastructure\n");
3002
3003        core_dev_release_virtual_lun0();
3004        rd_module_exit();
3005        release_se_kmem_caches();
3006}
3007
3008MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3009MODULE_AUTHOR("nab@Linux-iSCSI.org");
3010MODULE_LICENSE("GPL");
3011
3012module_init(target_core_init_configfs);
3013module_exit(target_core_exit_configfs);
3014
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