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