drivers/target/target_core_configfs.c

   1 /*******************************************************************************
   2  * Filename:  target_core_configfs.c
   3  *
   4  * This file contains ConfigFS logic for the Generic Target Engine project.
   5  *
   6  * (c) Copyright 2008-2013 Datera, Inc.
   7  *
   8  * Nicholas A. Bellinger <nab@kernel.org>
   9  *
  10  * based on configfs Copyright (C) 2005 Oracle.  All rights reserved.
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  ****************************************************************************/
  22
  23 #include <linux/module.h>
  24 #include <linux/moduleparam.h>
  25 #include <generated/utsrelease.h>
  26 #include <linux/utsname.h>
  27 #include <linux/init.h>
  28 #include <linux/fs.h>
  29 #include <linux/namei.h>
  30 #include <linux/slab.h>
  31 #include <linux/types.h>
  32 #include <linux/delay.h>
  33 #include <linux/unistd.h>
  34 #include <linux/string.h>
  35 #include <linux/parser.h>
  36 #include <linux/syscalls.h>
  37 #include <linux/configfs.h>
  38 #include <linux/spinlock.h>
  39
  40 #include <target/target_core_base.h>
  41 #include <target/target_core_backend.h>
  42 #include <target/target_core_fabric.h>
  43 #include <target/target_core_fabric_configfs.h>
  44 #include <target/target_core_configfs.h>
  45 #include <target/configfs_macros.h>
  46
  47 #include "target_core_internal.h"
  48 #include "target_core_alua.h"
  49 #include "target_core_pr.h"
  50 #include "target_core_rd.h"
  51 #include "target_core_xcopy.h"
  52
  53 extern struct t10_alua_lu_gp *default_lu_gp;
  54
  55 static LIST_HEAD(g_tf_list);
  56 static DEFINE_MUTEX(g_tf_lock);
  57
  58 struct target_core_configfs_attribute {
  59         struct configfs_attribute attr;
  60         ssize_t (*show)(void *, char *);
  61         ssize_t (*store)(void *, const char *, size_t);
  62 };
  63
  64 static struct config_group target_core_hbagroup;
  65 static struct config_group alua_group;
  66 static struct config_group alua_lu_gps_group;
  67
  68 static inline struct se_hba *
  69 item_to_hba(struct config_item *item)
  70 {
  71         return container_of(to_config_group(item), struct se_hba, hba_group);
  72 }
  73
  74 /*
  75  * Attributes for /sys/kernel/config/target/
  76  */
  77 static ssize_t target_core_attr_show(struct config_item *item,
  78                                       struct configfs_attribute *attr,
  79                                       char *page)
  80 {
  81         return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
  82                 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
  83                 utsname()->sysname, utsname()->machine);
  84 }
  85
  86 static struct configfs_item_operations target_core_fabric_item_ops = {
  87         .show_attribute = target_core_attr_show,
  88 };
  89
  90 static struct configfs_attribute target_core_item_attr_version = {
  91         .ca_owner       = THIS_MODULE,
  92         .ca_name        = "version",
  93         .ca_mode        = S_IRUGO,
  94 };
  95
  96 static struct target_fabric_configfs *target_core_get_fabric(
  97         const char *name)
  98 {
  99         struct target_fabric_configfs *tf;
 100
 101         if (!name)
 102                 return NULL;
 103
 104         mutex_lock(&g_tf_lock);
 105         list_for_each_entry(tf, &g_tf_list, tf_list) {
 106                 if (!strcmp(tf->tf_name, name)) {
 107                         atomic_inc(&tf->tf_access_cnt);
 108                         mutex_unlock(&g_tf_lock);
 109                         return tf;
 110                 }
 111         }
 112         mutex_unlock(&g_tf_lock);
 113
 114         return NULL;
 115 }
 116
 117 /*
 118  * Called from struct target_core_group_ops->make_group()
 119  */
 120 static struct config_group *target_core_register_fabric(
 121         struct config_group *group,
 122         const char *name)
 123 {
 124         struct target_fabric_configfs *tf;
 125         int ret;
 126
 127         pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
 128                         " %s\n", group, name);
 129         /*
 130          * Below are some hardcoded request_module() calls to automatically
 131          * local fabric modules when the following is called:
 132          *
 133          * mkdir -p /sys/kernel/config/target/$MODULE_NAME
 134          *
 135          * Note that this does not limit which TCM fabric module can be
 136          * registered, but simply provids auto loading logic for modules with
 137          * mkdir(2) system calls with known TCM fabric modules.
 138          */
 139         if (!strncmp(name, "iscsi", 5)) {
 140                 /*
 141                  * Automatically load the LIO Target fabric module when the
 142                  * following is called:
 143                  *
 144                  * mkdir -p $CONFIGFS/target/iscsi
 145                  */
 146                 ret = request_module("iscsi_target_mod");
 147                 if (ret < 0) {
 148                         pr_err("request_module() failed for"
 149                                 " iscsi_target_mod.ko: %d\n", ret);
 150                         return ERR_PTR(-EINVAL);
 151                 }
 152         } else if (!strncmp(name, "loopback", 8)) {
 153                 /*
 154                  * Automatically load the tcm_loop fabric module when the
 155                  * following is called:
 156                  *
 157                  * mkdir -p $CONFIGFS/target/loopback
 158                  */
 159                 ret = request_module("tcm_loop");
 160                 if (ret < 0) {
 161                         pr_err("request_module() failed for"
 162                                 " tcm_loop.ko: %d\n", ret);
 163                         return ERR_PTR(-EINVAL);
 164                 }
 165         }
 166
 167         tf = target_core_get_fabric(name);
 168         if (!tf) {
 169                 pr_err("target_core_get_fabric() failed for %s\n",
 170                         name);
 171                 return ERR_PTR(-EINVAL);
 172         }
 173         pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
 174                         " %s\n", tf->tf_name);
 175         /*
 176          * On a successful target_core_get_fabric() look, the returned
 177          * struct target_fabric_configfs *tf will contain a usage reference.
 178          */
 179         pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
 180                         &TF_CIT_TMPL(tf)->tfc_wwn_cit);
 181
 182         tf->tf_group.default_groups = tf->tf_default_groups;
 183         tf->tf_group.default_groups[0] = &tf->tf_disc_group;
 184         tf->tf_group.default_groups[1] = NULL;
 185
 186         config_group_init_type_name(&tf->tf_group, name,
 187                         &TF_CIT_TMPL(tf)->tfc_wwn_cit);
 188         config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
 189                         &TF_CIT_TMPL(tf)->tfc_discovery_cit);
 190
 191         pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
 192                         " %s\n", tf->tf_group.cg_item.ci_name);
 193         /*
 194          * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
 195          */
 196         tf->tf_ops.tf_subsys = tf->tf_subsys;
 197         tf->tf_fabric = &tf->tf_group.cg_item;
 198         pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
 199                         " for %s\n", name);
 200
 201         return &tf->tf_group;
 202 }
 203
 204 /*
 205  * Called from struct target_core_group_ops->drop_item()
 206  */
 207 static void target_core_deregister_fabric(
 208         struct config_group *group,
 209         struct config_item *item)
 210 {
 211         struct target_fabric_configfs *tf = container_of(
 212                 to_config_group(item), struct target_fabric_configfs, tf_group);
 213         struct config_group *tf_group;
 214         struct config_item *df_item;
 215         int i;
 216
 217         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
 218                 " tf list\n", config_item_name(item));
 219
 220         pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
 221                         " %s\n", tf->tf_name);
 222         atomic_dec(&tf->tf_access_cnt);
 223
 224         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
 225                         " tf->tf_fabric for %s\n", tf->tf_name);
 226         tf->tf_fabric = NULL;
 227
 228         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
 229                         " %s\n", config_item_name(item));
 230
 231         tf_group = &tf->tf_group;
 232         for (i = 0; tf_group->default_groups[i]; i++) {
 233                 df_item = &tf_group->default_groups[i]->cg_item;
 234                 tf_group->default_groups[i] = NULL;
 235                 config_item_put(df_item);
 236         }
 237         config_item_put(item);
 238 }
 239
 240 static struct configfs_group_operations target_core_fabric_group_ops = {
 241         .make_group     = &target_core_register_fabric,
 242         .drop_item      = &target_core_deregister_fabric,
 243 };
 244
 245 /*
 246  * All item attributes appearing in /sys/kernel/target/ appear here.
 247  */
 248 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
 249         &target_core_item_attr_version,
 250         NULL,
 251 };
 252
 253 /*
 254  * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
 255  */
 256 static struct config_item_type target_core_fabrics_item = {
 257         .ct_item_ops    = &target_core_fabric_item_ops,
 258         .ct_group_ops   = &target_core_fabric_group_ops,
 259         .ct_attrs       = target_core_fabric_item_attrs,
 260         .ct_owner       = THIS_MODULE,
 261 };
 262
 263 static struct configfs_subsystem target_core_fabrics = {
 264         .su_group = {
 265                 .cg_item = {
 266                         .ci_namebuf = "target",
 267                         .ci_type = &target_core_fabrics_item,
 268                 },
 269         },
 270 };
 271
 272 struct configfs_subsystem *target_core_subsystem[] = {
 273         &target_core_fabrics,
 274         NULL,
 275 };
 276
 277 /*##############################################################################
 278 // Start functions called by external Target Fabrics Modules
 279 //############################################################################*/
 280
 281 /*
 282  * First function called by fabric modules to:
 283  *
 284  * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
 285  * 2) Add struct target_fabric_configfs to g_tf_list
 286  * 3) Return struct target_fabric_configfs to fabric module to be passed
 287  *    into target_fabric_configfs_register().
 288  */
 289 struct target_fabric_configfs *target_fabric_configfs_init(
 290         struct module *fabric_mod,
 291         const char *name)
 292 {
 293         struct target_fabric_configfs *tf;
 294
 295         if (!(name)) {
 296                 pr_err("Unable to locate passed fabric name\n");
 297                 return ERR_PTR(-EINVAL);
 298         }
 299         if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
 300                 pr_err("Passed name: %s exceeds TARGET_FABRIC"
 301                         "_NAME_SIZE\n", name);
 302                 return ERR_PTR(-EINVAL);
 303         }
 304
 305         tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
 306         if (!tf)
 307                 return ERR_PTR(-ENOMEM);
 308
 309         INIT_LIST_HEAD(&tf->tf_list);
 310         atomic_set(&tf->tf_access_cnt, 0);
 311         /*
 312          * Setup the default generic struct config_item_type's (cits) in
 313          * struct target_fabric_configfs->tf_cit_tmpl
 314          */
 315         tf->tf_module = fabric_mod;
 316         target_fabric_setup_cits(tf);
 317
 318         tf->tf_subsys = target_core_subsystem[0];
 319         snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
 320
 321         mutex_lock(&g_tf_lock);
 322         list_add_tail(&tf->tf_list, &g_tf_list);
 323         mutex_unlock(&g_tf_lock);
 324
 325         pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
 326                         ">>>>>>>>>>>>>>\n");
 327         pr_debug("Initialized struct target_fabric_configfs: %p for"
 328                         " %s\n", tf, tf->tf_name);
 329         return tf;
 330 }
 331 EXPORT_SYMBOL(target_fabric_configfs_init);
 332
 333 /*
 334  * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
 335  */
 336 void target_fabric_configfs_free(
 337         struct target_fabric_configfs *tf)
 338 {
 339         mutex_lock(&g_tf_lock);
 340         list_del(&tf->tf_list);
 341         mutex_unlock(&g_tf_lock);
 342
 343         kfree(tf);
 344 }
 345 EXPORT_SYMBOL(target_fabric_configfs_free);
 346
 347 /*
 348  * Perform a sanity check of the passed tf->tf_ops before completing
 349  * TCM fabric module registration.
 350  */
 351 static int target_fabric_tf_ops_check(
 352         struct target_fabric_configfs *tf)
 353 {
 354         struct target_core_fabric_ops *tfo = &tf->tf_ops;
 355
 356         if (!tfo->get_fabric_name) {
 357                 pr_err("Missing tfo->get_fabric_name()\n");
 358                 return -EINVAL;
 359         }
 360         if (!tfo->get_fabric_proto_ident) {
 361                 pr_err("Missing tfo->get_fabric_proto_ident()\n");
 362                 return -EINVAL;
 363         }
 364         if (!tfo->tpg_get_wwn) {
 365                 pr_err("Missing tfo->tpg_get_wwn()\n");
 366                 return -EINVAL;
 367         }
 368         if (!tfo->tpg_get_tag) {
 369                 pr_err("Missing tfo->tpg_get_tag()\n");
 370                 return -EINVAL;
 371         }
 372         if (!tfo->tpg_get_default_depth) {
 373                 pr_err("Missing tfo->tpg_get_default_depth()\n");
 374                 return -EINVAL;
 375         }
 376         if (!tfo->tpg_get_pr_transport_id) {
 377                 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
 378                 return -EINVAL;
 379         }
 380         if (!tfo->tpg_get_pr_transport_id_len) {
 381                 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
 382                 return -EINVAL;
 383         }
 384         if (!tfo->tpg_check_demo_mode) {
 385                 pr_err("Missing tfo->tpg_check_demo_mode()\n");
 386                 return -EINVAL;
 387         }
 388         if (!tfo->tpg_check_demo_mode_cache) {
 389                 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
 390                 return -EINVAL;
 391         }
 392         if (!tfo->tpg_check_demo_mode_write_protect) {
 393                 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
 394                 return -EINVAL;
 395         }
 396         if (!tfo->tpg_check_prod_mode_write_protect) {
 397                 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
 398                 return -EINVAL;
 399         }
 400         if (!tfo->tpg_alloc_fabric_acl) {
 401                 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
 402                 return -EINVAL;
 403         }
 404         if (!tfo->tpg_release_fabric_acl) {
 405                 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
 406                 return -EINVAL;
 407         }
 408         if (!tfo->tpg_get_inst_index) {
 409                 pr_err("Missing tfo->tpg_get_inst_index()\n");
 410                 return -EINVAL;
 411         }
 412         if (!tfo->release_cmd) {
 413                 pr_err("Missing tfo->release_cmd()\n");
 414                 return -EINVAL;
 415         }
 416         if (!tfo->shutdown_session) {
 417                 pr_err("Missing tfo->shutdown_session()\n");
 418                 return -EINVAL;
 419         }
 420         if (!tfo->close_session) {
 421                 pr_err("Missing tfo->close_session()\n");
 422                 return -EINVAL;
 423         }
 424         if (!tfo->sess_get_index) {
 425                 pr_err("Missing tfo->sess_get_index()\n");
 426                 return -EINVAL;
 427         }
 428         if (!tfo->write_pending) {
 429                 pr_err("Missing tfo->write_pending()\n");
 430                 return -EINVAL;
 431         }
 432         if (!tfo->write_pending_status) {
 433                 pr_err("Missing tfo->write_pending_status()\n");
 434                 return -EINVAL;
 435         }
 436         if (!tfo->set_default_node_attributes) {
 437                 pr_err("Missing tfo->set_default_node_attributes()\n");
 438                 return -EINVAL;
 439         }
 440         if (!tfo->get_task_tag) {
 441                 pr_err("Missing tfo->get_task_tag()\n");
 442                 return -EINVAL;
 443         }
 444         if (!tfo->get_cmd_state) {
 445                 pr_err("Missing tfo->get_cmd_state()\n");
 446                 return -EINVAL;
 447         }
 448         if (!tfo->queue_data_in) {
 449                 pr_err("Missing tfo->queue_data_in()\n");
 450                 return -EINVAL;
 451         }
 452         if (!tfo->queue_status) {
 453                 pr_err("Missing tfo->queue_status()\n");
 454                 return -EINVAL;
 455         }
 456         if (!tfo->queue_tm_rsp) {
 457                 pr_err("Missing tfo->queue_tm_rsp()\n");
 458                 return -EINVAL;
 459         }
 460         /*
 461          * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
 462          * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
 463          * target_core_fabric_configfs.c WWN+TPG group context code.
 464          */
 465         if (!tfo->fabric_make_wwn) {
 466                 pr_err("Missing tfo->fabric_make_wwn()\n");
 467                 return -EINVAL;
 468         }
 469         if (!tfo->fabric_drop_wwn) {
 470                 pr_err("Missing tfo->fabric_drop_wwn()\n");
 471                 return -EINVAL;
 472         }
 473         if (!tfo->fabric_make_tpg) {
 474                 pr_err("Missing tfo->fabric_make_tpg()\n");
 475                 return -EINVAL;
 476         }
 477         if (!tfo->fabric_drop_tpg) {
 478                 pr_err("Missing tfo->fabric_drop_tpg()\n");
 479                 return -EINVAL;
 480         }
 481
 482         return 0;
 483 }
 484
 485 /*
 486  * Called 2nd from fabric module with returned parameter of
 487  * struct target_fabric_configfs * from target_fabric_configfs_init().
 488  *
 489  * Upon a successful registration, the new fabric's struct config_item is
 490  * return.  Also, a pointer to this struct is set in the passed
 491  * struct target_fabric_configfs.
 492  */
 493 int target_fabric_configfs_register(
 494         struct target_fabric_configfs *tf)
 495 {
 496         int ret;
 497
 498         if (!tf) {
 499                 pr_err("Unable to locate target_fabric_configfs"
 500                         " pointer\n");
 501                 return -EINVAL;
 502         }
 503         if (!tf->tf_subsys) {
 504                 pr_err("Unable to target struct config_subsystem"
 505                         " pointer\n");
 506                 return -EINVAL;
 507         }
 508         ret = target_fabric_tf_ops_check(tf);
 509         if (ret < 0)
 510                 return ret;
 511
 512         pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
 513                 ">>>>>>>>>>\n");
 514         return 0;
 515 }
 516 EXPORT_SYMBOL(target_fabric_configfs_register);
 517
 518 void target_fabric_configfs_deregister(
 519         struct target_fabric_configfs *tf)
 520 {
 521         struct configfs_subsystem *su;
 522
 523         if (!tf) {
 524                 pr_err("Unable to locate passed target_fabric_"
 525                         "configfs\n");
 526                 return;
 527         }
 528         su = tf->tf_subsys;
 529         if (!su) {
 530                 pr_err("Unable to locate passed tf->tf_subsys"
 531                         " pointer\n");
 532                 return;
 533         }
 534         pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
 535                         ">>>>>>>>>>>>\n");
 536         mutex_lock(&g_tf_lock);
 537         if (atomic_read(&tf->tf_access_cnt)) {
 538                 mutex_unlock(&g_tf_lock);
 539                 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
 540                         tf->tf_name);
 541                 BUG();
 542         }
 543         list_del(&tf->tf_list);
 544         mutex_unlock(&g_tf_lock);
 545
 546         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
 547                         " %s\n", tf->tf_name);
 548         tf->tf_module = NULL;
 549         tf->tf_subsys = NULL;
 550         kfree(tf);
 551
 552         pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
 553                         ">>>>>\n");
 554 }
 555 EXPORT_SYMBOL(target_fabric_configfs_deregister);
 556
 557 /*##############################################################################
 558 // Stop functions called by external Target Fabrics Modules
 559 //############################################################################*/
 560
 561 /* Start functions for struct config_item_type target_core_dev_attrib_cit */
 562
 563 #define DEF_DEV_ATTRIB_SHOW(_name)                                      \
 564 static ssize_t target_core_dev_show_attr_##_name(                       \
 565         struct se_dev_attrib *da,                                       \
 566         char *page)                                                     \
 567 {                                                                       \
 568         return snprintf(page, PAGE_SIZE, "%u\n",                        \
 569                 (u32)da->da_dev->dev_attrib._name);                     \
 570 }
 571
 572 #define DEF_DEV_ATTRIB_STORE(_name)                                     \
 573 static ssize_t target_core_dev_store_attr_##_name(                      \
 574         struct se_dev_attrib *da,                                       \
 575         const char *page,                                               \
 576         size_t count)                                                   \
 577 {                                                                       \
 578         unsigned long val;                                              \
 579         int ret;                                                        \
 580                                                                         \
 581         ret = kstrtoul(page, 0, &val);                          \
 582         if (ret < 0) {                                                  \
 583                 pr_err("kstrtoul() failed with"         \
 584                         " ret: %d\n", ret);                             \
 585                 return -EINVAL;                                         \
 586         }                                                               \
 587         ret = se_dev_set_##_name(da->da_dev, (u32)val);                 \
 588                                                                         \
 589         return (!ret) ? count : -EINVAL;                                \
 590 }
 591
 592 #define DEF_DEV_ATTRIB(_name)                                           \
 593 DEF_DEV_ATTRIB_SHOW(_name);                                             \
 594 DEF_DEV_ATTRIB_STORE(_name);
 595
 596 #define DEF_DEV_ATTRIB_RO(_name)                                        \
 597 DEF_DEV_ATTRIB_SHOW(_name);
 598
 599 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
 600 #define SE_DEV_ATTR(_name, _mode)                                       \
 601 static struct target_core_dev_attrib_attribute                          \
 602                         target_core_dev_attrib_##_name =                \
 603                 __CONFIGFS_EATTR(_name, _mode,                          \
 604                 target_core_dev_show_attr_##_name,                      \
 605                 target_core_dev_store_attr_##_name);
 606
 607 #define SE_DEV_ATTR_RO(_name);                                          \
 608 static struct target_core_dev_attrib_attribute                          \
 609                         target_core_dev_attrib_##_name =                \
 610         __CONFIGFS_EATTR_RO(_name,                                      \
 611         target_core_dev_show_attr_##_name);
 612
 613 DEF_DEV_ATTRIB(emulate_model_alias);
 614 SE_DEV_ATTR(emulate_model_alias, S_IRUGO | S_IWUSR);
 615
 616 DEF_DEV_ATTRIB(emulate_dpo);
 617 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
 618
 619 DEF_DEV_ATTRIB(emulate_fua_write);
 620 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
 621
 622 DEF_DEV_ATTRIB(emulate_fua_read);
 623 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
 624
 625 DEF_DEV_ATTRIB(emulate_write_cache);
 626 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
 627
 628 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
 629 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
 630
 631 DEF_DEV_ATTRIB(emulate_tas);
 632 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
 633
 634 DEF_DEV_ATTRIB(emulate_tpu);
 635 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
 636
 637 DEF_DEV_ATTRIB(emulate_tpws);
 638 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
 639
 640 DEF_DEV_ATTRIB(emulate_caw);
 641 SE_DEV_ATTR(emulate_caw, S_IRUGO | S_IWUSR);
 642
 643 DEF_DEV_ATTRIB(emulate_3pc);
 644 SE_DEV_ATTR(emulate_3pc, S_IRUGO | S_IWUSR);
 645
 646 DEF_DEV_ATTRIB(enforce_pr_isids);
 647 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
 648
 649 DEF_DEV_ATTRIB(is_nonrot);
 650 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
 651
 652 DEF_DEV_ATTRIB(emulate_rest_reord);
 653 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
 654
 655 DEF_DEV_ATTRIB_RO(hw_block_size);
 656 SE_DEV_ATTR_RO(hw_block_size);
 657
 658 DEF_DEV_ATTRIB(block_size);
 659 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
 660
 661 DEF_DEV_ATTRIB_RO(hw_max_sectors);
 662 SE_DEV_ATTR_RO(hw_max_sectors);
 663
 664 DEF_DEV_ATTRIB(fabric_max_sectors);
 665 SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR);
 666
 667 DEF_DEV_ATTRIB(optimal_sectors);
 668 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
 669
 670 DEF_DEV_ATTRIB_RO(hw_queue_depth);
 671 SE_DEV_ATTR_RO(hw_queue_depth);
 672
 673 DEF_DEV_ATTRIB(queue_depth);
 674 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
 675
 676 DEF_DEV_ATTRIB(max_unmap_lba_count);
 677 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
 678
 679 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
 680 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
 681
 682 DEF_DEV_ATTRIB(unmap_granularity);
 683 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
 684
 685 DEF_DEV_ATTRIB(unmap_granularity_alignment);
 686 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
 687
 688 DEF_DEV_ATTRIB(max_write_same_len);
 689 SE_DEV_ATTR(max_write_same_len, S_IRUGO | S_IWUSR);
 690
 691 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
 692
 693 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
 694         &target_core_dev_attrib_emulate_model_alias.attr,
 695         &target_core_dev_attrib_emulate_dpo.attr,
 696         &target_core_dev_attrib_emulate_fua_write.attr,
 697         &target_core_dev_attrib_emulate_fua_read.attr,
 698         &target_core_dev_attrib_emulate_write_cache.attr,
 699         &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
 700         &target_core_dev_attrib_emulate_tas.attr,
 701         &target_core_dev_attrib_emulate_tpu.attr,
 702         &target_core_dev_attrib_emulate_tpws.attr,
 703         &target_core_dev_attrib_emulate_caw.attr,
 704         &target_core_dev_attrib_emulate_3pc.attr,
 705         &target_core_dev_attrib_enforce_pr_isids.attr,
 706         &target_core_dev_attrib_is_nonrot.attr,
 707         &target_core_dev_attrib_emulate_rest_reord.attr,
 708         &target_core_dev_attrib_hw_block_size.attr,
 709         &target_core_dev_attrib_block_size.attr,
 710         &target_core_dev_attrib_hw_max_sectors.attr,
 711         &target_core_dev_attrib_fabric_max_sectors.attr,
 712         &target_core_dev_attrib_optimal_sectors.attr,
 713         &target_core_dev_attrib_hw_queue_depth.attr,
 714         &target_core_dev_attrib_queue_depth.attr,
 715         &target_core_dev_attrib_max_unmap_lba_count.attr,
 716         &target_core_dev_attrib_max_unmap_block_desc_count.attr,
 717         &target_core_dev_attrib_unmap_granularity.attr,
 718         &target_core_dev_attrib_unmap_granularity_alignment.attr,
 719         &target_core_dev_attrib_max_write_same_len.attr,
 720         NULL,
 721 };
 722
 723 static struct configfs_item_operations target_core_dev_attrib_ops = {
 724         .show_attribute         = target_core_dev_attrib_attr_show,
 725         .store_attribute        = target_core_dev_attrib_attr_store,
 726 };
 727
 728 static struct config_item_type target_core_dev_attrib_cit = {
 729         .ct_item_ops            = &target_core_dev_attrib_ops,
 730         .ct_attrs               = target_core_dev_attrib_attrs,
 731         .ct_owner               = THIS_MODULE,
 732 };
 733
 734 /* End functions for struct config_item_type target_core_dev_attrib_cit */
 735
 736 /*  Start functions for struct config_item_type target_core_dev_wwn_cit */
 737
 738 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
 739 #define SE_DEV_WWN_ATTR(_name, _mode)                                   \
 740 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
 741                 __CONFIGFS_EATTR(_name, _mode,                          \
 742                 target_core_dev_wwn_show_attr_##_name,                  \
 743                 target_core_dev_wwn_store_attr_##_name);
 744
 745 #define SE_DEV_WWN_ATTR_RO(_name);                                      \
 746 do {                                                                    \
 747         static struct target_core_dev_wwn_attribute                     \
 748                         target_core_dev_wwn_##_name =                   \
 749                 __CONFIGFS_EATTR_RO(_name,                              \
 750                 target_core_dev_wwn_show_attr_##_name);                 \
 751 } while (0);
 752
 753 /*
 754  * VPD page 0x80 Unit serial
 755  */
 756 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
 757         struct t10_wwn *t10_wwn,
 758         char *page)
 759 {
 760         return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
 761                 &t10_wwn->unit_serial[0]);
 762 }
 763
 764 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
 765         struct t10_wwn *t10_wwn,
 766         const char *page,
 767         size_t count)
 768 {
 769         struct se_device *dev = t10_wwn->t10_dev;
 770         unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
 771
 772         /*
 773          * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
 774          * from the struct scsi_device level firmware, do not allow
 775          * VPD Unit Serial to be emulated.
 776          *
 777          * Note this struct scsi_device could also be emulating VPD
 778          * information from its drivers/scsi LLD.  But for now we assume
 779          * it is doing 'the right thing' wrt a world wide unique
 780          * VPD Unit Serial Number that OS dependent multipath can depend on.
 781          */
 782         if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
 783                 pr_err("Underlying SCSI device firmware provided VPD"
 784                         " Unit Serial, ignoring request\n");
 785                 return -EOPNOTSUPP;
 786         }
 787
 788         if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
 789                 pr_err("Emulated VPD Unit Serial exceeds"
 790                 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
 791                 return -EOVERFLOW;
 792         }
 793         /*
 794          * Check to see if any active $FABRIC_MOD exports exist.  If they
 795          * do exist, fail here as changing this information on the fly
 796          * (underneath the initiator side OS dependent multipath code)
 797          * could cause negative effects.
 798          */
 799         if (dev->export_count) {
 800                 pr_err("Unable to set VPD Unit Serial while"
 801                         " active %d $FABRIC_MOD exports exist\n",
 802                         dev->export_count);
 803                 return -EINVAL;
 804         }
 805
 806         /*
 807          * This currently assumes ASCII encoding for emulated VPD Unit Serial.
 808          *
 809          * Also, strip any newline added from the userspace
 810          * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
 811          */
 812         memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
 813         snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
 814         snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
 815                         "%s", strstrip(buf));
 816         dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
 817
 818         pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
 819                         " %s\n", dev->t10_wwn.unit_serial);
 820
 821         return count;
 822 }
 823
 824 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
 825
 826 /*
 827  * VPD page 0x83 Protocol Identifier
 828  */
 829 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
 830         struct t10_wwn *t10_wwn,
 831         char *page)
 832 {
 833         struct t10_vpd *vpd;
 834         unsigned char buf[VPD_TMP_BUF_SIZE];
 835         ssize_t len = 0;
 836
 837         memset(buf, 0, VPD_TMP_BUF_SIZE);
 838
 839         spin_lock(&t10_wwn->t10_vpd_lock);
 840         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
 841                 if (!vpd->protocol_identifier_set)
 842                         continue;
 843
 844                 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
 845
 846                 if (len + strlen(buf) >= PAGE_SIZE)
 847                         break;
 848
 849                 len += sprintf(page+len, "%s", buf);
 850         }
 851         spin_unlock(&t10_wwn->t10_vpd_lock);
 852
 853         return len;
 854 }
 855
 856 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
 857         struct t10_wwn *t10_wwn,
 858         const char *page,
 859         size_t count)
 860 {
 861         return -ENOSYS;
 862 }
 863
 864 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
 865
 866 /*
 867  * Generic wrapper for dumping VPD identifiers by association.
 868  */
 869 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc)                           \
 870 static ssize_t target_core_dev_wwn_show_attr_##_name(                   \
 871         struct t10_wwn *t10_wwn,                                        \
 872         char *page)                                                     \
 873 {                                                                       \
 874         struct t10_vpd *vpd;                                                    \
 875         unsigned char buf[VPD_TMP_BUF_SIZE];                            \
 876         ssize_t len = 0;                                                \
 877                                                                         \
 878         spin_lock(&t10_wwn->t10_vpd_lock);                              \
 879         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {    \
 880                 if (vpd->association != _assoc)                         \
 881                         continue;                                       \
 882                                                                         \
 883                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 884                 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE);   \
 885                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 886                         break;                                          \
 887                 len += sprintf(page+len, "%s", buf);                    \
 888                                                                         \
 889                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 890                 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
 891                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 892                         break;                                          \
 893                 len += sprintf(page+len, "%s", buf);                    \
 894                                                                         \
 895                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 896                 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
 897                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 898                         break;                                          \
 899                 len += sprintf(page+len, "%s", buf);                    \
 900         }                                                               \
 901         spin_unlock(&t10_wwn->t10_vpd_lock);                            \
 902                                                                         \
 903         return len;                                                     \
 904 }
 905
 906 /*
 907  * VPD page 0x83 Association: Logical Unit
 908  */
 909 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
 910
 911 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
 912         struct t10_wwn *t10_wwn,
 913         const char *page,
 914         size_t count)
 915 {
 916         return -ENOSYS;
 917 }
 918
 919 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
 920
 921 /*
 922  * VPD page 0x83 Association: Target Port
 923  */
 924 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
 925
 926 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
 927         struct t10_wwn *t10_wwn,
 928         const char *page,
 929         size_t count)
 930 {
 931         return -ENOSYS;
 932 }
 933
 934 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
 935
 936 /*
 937  * VPD page 0x83 Association: SCSI Target Device
 938  */
 939 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
 940
 941 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
 942         struct t10_wwn *t10_wwn,
 943         const char *page,
 944         size_t count)
 945 {
 946         return -ENOSYS;
 947 }
 948
 949 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
 950
 951 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
 952
 953 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
 954         &target_core_dev_wwn_vpd_unit_serial.attr,
 955         &target_core_dev_wwn_vpd_protocol_identifier.attr,
 956         &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
 957         &target_core_dev_wwn_vpd_assoc_target_port.attr,
 958         &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
 959         NULL,
 960 };
 961
 962 static struct configfs_item_operations target_core_dev_wwn_ops = {
 963         .show_attribute         = target_core_dev_wwn_attr_show,
 964         .store_attribute        = target_core_dev_wwn_attr_store,
 965 };
 966
 967 static struct config_item_type target_core_dev_wwn_cit = {
 968         .ct_item_ops            = &target_core_dev_wwn_ops,
 969         .ct_attrs               = target_core_dev_wwn_attrs,
 970         .ct_owner               = THIS_MODULE,
 971 };
 972
 973 /*  End functions for struct config_item_type target_core_dev_wwn_cit */
 974
 975 /*  Start functions for struct config_item_type target_core_dev_pr_cit */
 976
 977 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
 978 #define SE_DEV_PR_ATTR(_name, _mode)                                    \
 979 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
 980         __CONFIGFS_EATTR(_name, _mode,                                  \
 981         target_core_dev_pr_show_attr_##_name,                           \
 982         target_core_dev_pr_store_attr_##_name);
 983
 984 #define SE_DEV_PR_ATTR_RO(_name);                                       \
 985 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
 986         __CONFIGFS_EATTR_RO(_name,                                      \
 987         target_core_dev_pr_show_attr_##_name);
 988
 989 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
 990                 char *page)
 991 {
 992         struct se_node_acl *se_nacl;
 993         struct t10_pr_registration *pr_reg;
 994         char i_buf[PR_REG_ISID_ID_LEN];
 995
 996         memset(i_buf, 0, PR_REG_ISID_ID_LEN);
 997
 998         pr_reg = dev->dev_pr_res_holder;
 999         if (!pr_reg)
1000                 return sprintf(page, "No SPC-3 Reservation holder\n");
1001
1002         se_nacl = pr_reg->pr_reg_nacl;
1003         core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1004
1005         return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1006                 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1007                 se_nacl->initiatorname, i_buf);
1008 }
1009
1010 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1011                 char *page)
1012 {
1013         struct se_node_acl *se_nacl;
1014         ssize_t len;
1015
1016         se_nacl = dev->dev_reserved_node_acl;
1017         if (se_nacl) {
1018                 len = sprintf(page,
1019                               "SPC-2 Reservation: %s Initiator: %s\n",
1020                               se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1021                               se_nacl->initiatorname);
1022         } else {
1023                 len = sprintf(page, "No SPC-2 Reservation holder\n");
1024         }
1025         return len;
1026 }
1027
1028 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
1029                 char *page)
1030 {
1031         int ret;
1032
1033         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1034                 return sprintf(page, "Passthrough\n");
1035
1036         spin_lock(&dev->dev_reservation_lock);
1037         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1038                 ret = target_core_dev_pr_show_spc2_res(dev, page);
1039         else
1040                 ret = target_core_dev_pr_show_spc3_res(dev, page);
1041         spin_unlock(&dev->dev_reservation_lock);
1042         return ret;
1043 }
1044
1045 SE_DEV_PR_ATTR_RO(res_holder);
1046
1047 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1048                 struct se_device *dev, char *page)
1049 {
1050         ssize_t len = 0;
1051
1052         spin_lock(&dev->dev_reservation_lock);
1053         if (!dev->dev_pr_res_holder) {
1054                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1055         } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1056                 len = sprintf(page, "SPC-3 Reservation: All Target"
1057                         " Ports registration\n");
1058         } else {
1059                 len = sprintf(page, "SPC-3 Reservation: Single"
1060                         " Target Port registration\n");
1061         }
1062
1063         spin_unlock(&dev->dev_reservation_lock);
1064         return len;
1065 }
1066
1067 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1068
1069 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1070                 struct se_device *dev, char *page)
1071 {
1072         return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
1073 }
1074
1075 SE_DEV_PR_ATTR_RO(res_pr_generation);
1076
1077 /*
1078  * res_pr_holder_tg_port
1079  */
1080 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1081                 struct se_device *dev, char *page)
1082 {
1083         struct se_node_acl *se_nacl;
1084         struct se_lun *lun;
1085         struct se_portal_group *se_tpg;
1086         struct t10_pr_registration *pr_reg;
1087         struct target_core_fabric_ops *tfo;
1088         ssize_t len = 0;
1089
1090         spin_lock(&dev->dev_reservation_lock);
1091         pr_reg = dev->dev_pr_res_holder;
1092         if (!pr_reg) {
1093                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1094                 goto out_unlock;
1095         }
1096
1097         se_nacl = pr_reg->pr_reg_nacl;
1098         se_tpg = se_nacl->se_tpg;
1099         lun = pr_reg->pr_reg_tg_pt_lun;
1100         tfo = se_tpg->se_tpg_tfo;
1101
1102         len += sprintf(page+len, "SPC-3 Reservation: %s"
1103                 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1104                 tfo->tpg_get_wwn(se_tpg));
1105         len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1106                 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1107                 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1108                 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1109                 tfo->get_fabric_name(), lun->unpacked_lun);
1110
1111 out_unlock:
1112         spin_unlock(&dev->dev_reservation_lock);
1113         return len;
1114 }
1115
1116 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1117
1118 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1119                 struct se_device *dev, char *page)
1120 {
1121         struct target_core_fabric_ops *tfo;
1122         struct t10_pr_registration *pr_reg;
1123         unsigned char buf[384];
1124         char i_buf[PR_REG_ISID_ID_LEN];
1125         ssize_t len = 0;
1126         int reg_count = 0;
1127
1128         len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1129
1130         spin_lock(&dev->t10_pr.registration_lock);
1131         list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1132                         pr_reg_list) {
1133
1134                 memset(buf, 0, 384);
1135                 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1136                 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1137                 core_pr_dump_initiator_port(pr_reg, i_buf,
1138                                         PR_REG_ISID_ID_LEN);
1139                 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1140                         tfo->get_fabric_name(),
1141                         pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1142                         pr_reg->pr_res_generation);
1143
1144                 if (len + strlen(buf) >= PAGE_SIZE)
1145                         break;
1146
1147                 len += sprintf(page+len, "%s", buf);
1148                 reg_count++;
1149         }
1150         spin_unlock(&dev->t10_pr.registration_lock);
1151
1152         if (!reg_count)
1153                 len += sprintf(page+len, "None\n");
1154
1155         return len;
1156 }
1157
1158 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1159
1160 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1161                 struct se_device *dev, char *page)
1162 {
1163         struct t10_pr_registration *pr_reg;
1164         ssize_t len = 0;
1165
1166         spin_lock(&dev->dev_reservation_lock);
1167         pr_reg = dev->dev_pr_res_holder;
1168         if (pr_reg) {
1169                 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1170                         core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1171         } else {
1172                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1173         }
1174
1175         spin_unlock(&dev->dev_reservation_lock);
1176         return len;
1177 }
1178
1179 SE_DEV_PR_ATTR_RO(res_pr_type);
1180
1181 static ssize_t target_core_dev_pr_show_attr_res_type(
1182                 struct se_device *dev, char *page)
1183 {
1184         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1185                 return sprintf(page, "SPC_PASSTHROUGH\n");
1186         else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1187                 return sprintf(page, "SPC2_RESERVATIONS\n");
1188         else
1189                 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1190 }
1191
1192 SE_DEV_PR_ATTR_RO(res_type);
1193
1194 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1195                 struct se_device *dev, char *page)
1196 {
1197         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1198                 return 0;
1199
1200         return sprintf(page, "APTPL Bit Status: %s\n",
1201                 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1202 }
1203
1204 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1205
1206 /*
1207  * res_aptpl_metadata
1208  */
1209 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1210                 struct se_device *dev, char *page)
1211 {
1212         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1213                 return 0;
1214
1215         return sprintf(page, "Ready to process PR APTPL metadata..\n");
1216 }
1217
1218 enum {
1219         Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1220         Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1221         Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1222         Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1223 };
1224
1225 static match_table_t tokens = {
1226         {Opt_initiator_fabric, "initiator_fabric=%s"},
1227         {Opt_initiator_node, "initiator_node=%s"},
1228         {Opt_initiator_sid, "initiator_sid=%s"},
1229         {Opt_sa_res_key, "sa_res_key=%s"},
1230         {Opt_res_holder, "res_holder=%d"},
1231         {Opt_res_type, "res_type=%d"},
1232         {Opt_res_scope, "res_scope=%d"},
1233         {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1234         {Opt_mapped_lun, "mapped_lun=%d"},
1235         {Opt_target_fabric, "target_fabric=%s"},
1236         {Opt_target_node, "target_node=%s"},
1237         {Opt_tpgt, "tpgt=%d"},
1238         {Opt_port_rtpi, "port_rtpi=%d"},
1239         {Opt_target_lun, "target_lun=%d"},
1240         {Opt_err, NULL}
1241 };
1242
1243 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1244         struct se_device *dev,
1245         const char *page,
1246         size_t count)
1247 {
1248         unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1249         unsigned char *t_fabric = NULL, *t_port = NULL;
1250         char *orig, *ptr, *arg_p, *opts;
1251         substring_t args[MAX_OPT_ARGS];
1252         unsigned long long tmp_ll;
1253         u64 sa_res_key = 0;
1254         u32 mapped_lun = 0, target_lun = 0;
1255         int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1256         u16 port_rpti = 0, tpgt = 0;
1257         u8 type = 0, scope;
1258
1259         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1260                 return 0;
1261         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1262                 return 0;
1263
1264         if (dev->export_count) {
1265                 pr_debug("Unable to process APTPL metadata while"
1266                         " active fabric exports exist\n");
1267                 return -EINVAL;
1268         }
1269
1270         opts = kstrdup(page, GFP_KERNEL);
1271         if (!opts)
1272                 return -ENOMEM;
1273
1274         orig = opts;
1275         while ((ptr = strsep(&opts, ",\n")) != NULL) {
1276                 if (!*ptr)
1277                         continue;
1278
1279                 token = match_token(ptr, tokens, args);
1280                 switch (token) {
1281                 case Opt_initiator_fabric:
1282                         i_fabric = match_strdup(&args[0]);
1283                         if (!i_fabric) {
1284                                 ret = -ENOMEM;
1285                                 goto out;
1286                         }
1287                         break;
1288                 case Opt_initiator_node:
1289                         i_port = match_strdup(&args[0]);
1290                         if (!i_port) {
1291                                 ret = -ENOMEM;
1292                                 goto out;
1293                         }
1294                         if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1295                                 pr_err("APTPL metadata initiator_node="
1296                                         " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1297                                         PR_APTPL_MAX_IPORT_LEN);
1298                                 ret = -EINVAL;
1299                                 break;
1300                         }
1301                         break;
1302                 case Opt_initiator_sid:
1303                         isid = match_strdup(&args[0]);
1304                         if (!isid) {
1305                                 ret = -ENOMEM;
1306                                 goto out;
1307                         }
1308                         if (strlen(isid) >= PR_REG_ISID_LEN) {
1309                                 pr_err("APTPL metadata initiator_isid"
1310                                         "= exceeds PR_REG_ISID_LEN: %d\n",
1311                                         PR_REG_ISID_LEN);
1312                                 ret = -EINVAL;
1313                                 break;
1314                         }
1315                         break;
1316                 case Opt_sa_res_key:
1317                         arg_p = match_strdup(&args[0]);
1318                         if (!arg_p) {
1319                                 ret = -ENOMEM;
1320                                 goto out;
1321                         }
1322                         ret = kstrtoull(arg_p, 0, &tmp_ll);
1323                         if (ret < 0) {
1324                                 pr_err("kstrtoull() failed for"
1325                                         " sa_res_key=\n");
1326                                 goto out;
1327                         }
1328                         sa_res_key = (u64)tmp_ll;
1329                         break;
1330                 /*
1331                  * PR APTPL Metadata for Reservation
1332                  */
1333                 case Opt_res_holder:
1334                         match_int(args, &arg);
1335                         res_holder = arg;
1336                         break;
1337                 case Opt_res_type:
1338                         match_int(args, &arg);
1339                         type = (u8)arg;
1340                         break;
1341                 case Opt_res_scope:
1342                         match_int(args, &arg);
1343                         scope = (u8)arg;
1344                         break;
1345                 case Opt_res_all_tg_pt:
1346                         match_int(args, &arg);
1347                         all_tg_pt = (int)arg;
1348                         break;
1349                 case Opt_mapped_lun:
1350                         match_int(args, &arg);
1351                         mapped_lun = (u32)arg;
1352                         break;
1353                 /*
1354                  * PR APTPL Metadata for Target Port
1355                  */
1356                 case Opt_target_fabric:
1357                         t_fabric = match_strdup(&args[0]);
1358                         if (!t_fabric) {
1359                                 ret = -ENOMEM;
1360                                 goto out;
1361                         }
1362                         break;
1363                 case Opt_target_node:
1364                         t_port = match_strdup(&args[0]);
1365                         if (!t_port) {
1366                                 ret = -ENOMEM;
1367                                 goto out;
1368                         }
1369                         if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1370                                 pr_err("APTPL metadata target_node="
1371                                         " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1372                                         PR_APTPL_MAX_TPORT_LEN);
1373                                 ret = -EINVAL;
1374                                 break;
1375                         }
1376                         break;
1377                 case Opt_tpgt:
1378                         match_int(args, &arg);
1379                         tpgt = (u16)arg;
1380                         break;
1381                 case Opt_port_rtpi:
1382                         match_int(args, &arg);
1383                         port_rpti = (u16)arg;
1384                         break;
1385                 case Opt_target_lun:
1386                         match_int(args, &arg);
1387                         target_lun = (u32)arg;
1388                         break;
1389                 default:
1390                         break;
1391                 }
1392         }
1393
1394         if (!i_port || !t_port || !sa_res_key) {
1395                 pr_err("Illegal parameters for APTPL registration\n");
1396                 ret = -EINVAL;
1397                 goto out;
1398         }
1399
1400         if (res_holder && !(type)) {
1401                 pr_err("Illegal PR type: 0x%02x for reservation"
1402                                 " holder\n", type);
1403                 ret = -EINVAL;
1404                 goto out;
1405         }
1406
1407         ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1408                         i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1409                         res_holder, all_tg_pt, type);
1410 out:
1411         kfree(i_fabric);
1412         kfree(i_port);
1413         kfree(isid);
1414         kfree(t_fabric);
1415         kfree(t_port);
1416         kfree(orig);
1417         return (ret == 0) ? count : ret;
1418 }
1419
1420 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1421
1422 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
1423
1424 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1425         &target_core_dev_pr_res_holder.attr,
1426         &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1427         &target_core_dev_pr_res_pr_generation.attr,
1428         &target_core_dev_pr_res_pr_holder_tg_port.attr,
1429         &target_core_dev_pr_res_pr_registered_i_pts.attr,
1430         &target_core_dev_pr_res_pr_type.attr,
1431         &target_core_dev_pr_res_type.attr,
1432         &target_core_dev_pr_res_aptpl_active.attr,
1433         &target_core_dev_pr_res_aptpl_metadata.attr,
1434         NULL,
1435 };
1436
1437 static struct configfs_item_operations target_core_dev_pr_ops = {
1438         .show_attribute         = target_core_dev_pr_attr_show,
1439         .store_attribute        = target_core_dev_pr_attr_store,
1440 };
1441
1442 static struct config_item_type target_core_dev_pr_cit = {
1443         .ct_item_ops            = &target_core_dev_pr_ops,
1444         .ct_attrs               = target_core_dev_pr_attrs,
1445         .ct_owner               = THIS_MODULE,
1446 };
1447
1448 /*  End functions for struct config_item_type target_core_dev_pr_cit */
1449
1450 /*  Start functions for struct config_item_type target_core_dev_cit */
1451
1452 static ssize_t target_core_show_dev_info(void *p, char *page)
1453 {
1454         struct se_device *dev = p;
1455         struct se_subsystem_api *t = dev->transport;
1456         int bl = 0;
1457         ssize_t read_bytes = 0;
1458
1459         transport_dump_dev_state(dev, page, &bl);
1460         read_bytes += bl;
1461         read_bytes += t->show_configfs_dev_params(dev, page+read_bytes);
1462         return read_bytes;
1463 }
1464
1465 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1466         .attr   = { .ca_owner = THIS_MODULE,
1467                     .ca_name = "info",
1468                     .ca_mode = S_IRUGO },
1469         .show   = target_core_show_dev_info,
1470         .store  = NULL,
1471 };
1472
1473 static ssize_t target_core_store_dev_control(
1474         void *p,
1475         const char *page,
1476         size_t count)
1477 {
1478         struct se_device *dev = p;
1479         struct se_subsystem_api *t = dev->transport;
1480
1481         return t->set_configfs_dev_params(dev, page, count);
1482 }
1483
1484 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1485         .attr   = { .ca_owner = THIS_MODULE,
1486                     .ca_name = "control",
1487                     .ca_mode = S_IWUSR },
1488         .show   = NULL,
1489         .store  = target_core_store_dev_control,
1490 };
1491
1492 static ssize_t target_core_show_dev_alias(void *p, char *page)
1493 {
1494         struct se_device *dev = p;
1495
1496         if (!(dev->dev_flags & DF_USING_ALIAS))
1497                 return 0;
1498
1499         return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1500 }
1501
1502 static ssize_t target_core_store_dev_alias(
1503         void *p,
1504         const char *page,
1505         size_t count)
1506 {
1507         struct se_device *dev = p;
1508         struct se_hba *hba = dev->se_hba;
1509         ssize_t read_bytes;
1510
1511         if (count > (SE_DEV_ALIAS_LEN-1)) {
1512                 pr_err("alias count: %d exceeds"
1513                         " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1514                         SE_DEV_ALIAS_LEN-1);
1515                 return -EINVAL;
1516         }
1517
1518         read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1519         if (!read_bytes)
1520                 return -EINVAL;
1521         if (dev->dev_alias[read_bytes - 1] == '\n')
1522                 dev->dev_alias[read_bytes - 1] = '\0';
1523
1524         dev->dev_flags |= DF_USING_ALIAS;
1525
1526         pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1527                 config_item_name(&hba->hba_group.cg_item),
1528                 config_item_name(&dev->dev_group.cg_item),
1529                 dev->dev_alias);
1530
1531         return read_bytes;
1532 }
1533
1534 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1535         .attr   = { .ca_owner = THIS_MODULE,
1536                     .ca_name = "alias",
1537                     .ca_mode =  S_IRUGO | S_IWUSR },
1538         .show   = target_core_show_dev_alias,
1539         .store  = target_core_store_dev_alias,
1540 };
1541
1542 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1543 {
1544         struct se_device *dev = p;
1545
1546         if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1547                 return 0;
1548
1549         return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1550 }
1551
1552 static ssize_t target_core_store_dev_udev_path(
1553         void *p,
1554         const char *page,
1555         size_t count)
1556 {
1557         struct se_device *dev = p;
1558         struct se_hba *hba = dev->se_hba;
1559         ssize_t read_bytes;
1560
1561         if (count > (SE_UDEV_PATH_LEN-1)) {
1562                 pr_err("udev_path count: %d exceeds"
1563                         " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1564                         SE_UDEV_PATH_LEN-1);
1565                 return -EINVAL;
1566         }
1567
1568         read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1569                         "%s", page);
1570         if (!read_bytes)
1571                 return -EINVAL;
1572         if (dev->udev_path[read_bytes - 1] == '\n')
1573                 dev->udev_path[read_bytes - 1] = '\0';
1574
1575         dev->dev_flags |= DF_USING_UDEV_PATH;
1576
1577         pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1578                 config_item_name(&hba->hba_group.cg_item),
1579                 config_item_name(&dev->dev_group.cg_item),
1580                 dev->udev_path);
1581
1582         return read_bytes;
1583 }
1584
1585 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1586         .attr   = { .ca_owner = THIS_MODULE,
1587                     .ca_name = "udev_path",
1588                     .ca_mode =  S_IRUGO | S_IWUSR },
1589         .show   = target_core_show_dev_udev_path,
1590         .store  = target_core_store_dev_udev_path,
1591 };
1592
1593 static ssize_t target_core_show_dev_enable(void *p, char *page)
1594 {
1595         struct se_device *dev = p;
1596
1597         return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1598 }
1599
1600 static ssize_t target_core_store_dev_enable(
1601         void *p,
1602         const char *page,
1603         size_t count)
1604 {
1605         struct se_device *dev = p;
1606         char *ptr;
1607         int ret;
1608
1609         ptr = strstr(page, "1");
1610         if (!ptr) {
1611                 pr_err("For dev_enable ops, only valid value"
1612                                 " is \"1\"\n");
1613                 return -EINVAL;
1614         }
1615
1616         ret = target_configure_device(dev);
1617         if (ret)
1618                 return ret;
1619         return count;
1620 }
1621
1622 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1623         .attr   = { .ca_owner = THIS_MODULE,
1624                     .ca_name = "enable",
1625                     .ca_mode =  S_IRUGO | S_IWUSR },
1626         .show   = target_core_show_dev_enable,
1627         .store  = target_core_store_dev_enable,
1628 };
1629
1630 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1631 {
1632         struct se_device *dev = p;
1633         struct config_item *lu_ci;
1634         struct t10_alua_lu_gp *lu_gp;
1635         struct t10_alua_lu_gp_member *lu_gp_mem;
1636         ssize_t len = 0;
1637
1638         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1639         if (!lu_gp_mem)
1640                 return 0;
1641
1642         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1643         lu_gp = lu_gp_mem->lu_gp;
1644         if (lu_gp) {
1645                 lu_ci = &lu_gp->lu_gp_group.cg_item;
1646                 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1647                         config_item_name(lu_ci), lu_gp->lu_gp_id);
1648         }
1649         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1650
1651         return len;
1652 }
1653
1654 static ssize_t target_core_store_alua_lu_gp(
1655         void *p,
1656         const char *page,
1657         size_t count)
1658 {
1659         struct se_device *dev = p;
1660         struct se_hba *hba = dev->se_hba;
1661         struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1662         struct t10_alua_lu_gp_member *lu_gp_mem;
1663         unsigned char buf[LU_GROUP_NAME_BUF];
1664         int move = 0;
1665
1666         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1667         if (!lu_gp_mem)
1668                 return 0;
1669
1670         if (count > LU_GROUP_NAME_BUF) {
1671                 pr_err("ALUA LU Group Alias too large!\n");
1672                 return -EINVAL;
1673         }
1674         memset(buf, 0, LU_GROUP_NAME_BUF);
1675         memcpy(buf, page, count);
1676         /*
1677          * Any ALUA logical unit alias besides "NULL" means we will be
1678          * making a new group association.
1679          */
1680         if (strcmp(strstrip(buf), "NULL")) {
1681                 /*
1682                  * core_alua_get_lu_gp_by_name() will increment reference to
1683                  * struct t10_alua_lu_gp.  This reference is released with
1684                  * core_alua_get_lu_gp_by_name below().
1685                  */
1686                 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1687                 if (!lu_gp_new)
1688                         return -ENODEV;
1689         }
1690
1691         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1692         lu_gp = lu_gp_mem->lu_gp;
1693         if (lu_gp) {
1694                 /*
1695                  * Clearing an existing lu_gp association, and replacing
1696                  * with NULL
1697                  */
1698                 if (!lu_gp_new) {
1699                         pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1700                                 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1701                                 " %hu\n",
1702                                 config_item_name(&hba->hba_group.cg_item),
1703                                 config_item_name(&dev->dev_group.cg_item),
1704                                 config_item_name(&lu_gp->lu_gp_group.cg_item),
1705                                 lu_gp->lu_gp_id);
1706
1707                         __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1708                         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1709
1710                         return count;
1711                 }
1712                 /*
1713                  * Removing existing association of lu_gp_mem with lu_gp
1714                  */
1715                 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1716                 move = 1;
1717         }
1718         /*
1719          * Associate lu_gp_mem with lu_gp_new.
1720          */
1721         __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1722         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1723
1724         pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1725                 " core/alua/lu_gps/%s, ID: %hu\n",
1726                 (move) ? "Moving" : "Adding",
1727                 config_item_name(&hba->hba_group.cg_item),
1728                 config_item_name(&dev->dev_group.cg_item),
1729                 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1730                 lu_gp_new->lu_gp_id);
1731
1732         core_alua_put_lu_gp_from_name(lu_gp_new);
1733         return count;
1734 }
1735
1736 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1737         .attr   = { .ca_owner = THIS_MODULE,
1738                     .ca_name = "alua_lu_gp",
1739                     .ca_mode = S_IRUGO | S_IWUSR },
1740         .show   = target_core_show_alua_lu_gp,
1741         .store  = target_core_store_alua_lu_gp,
1742 };
1743
1744 static struct configfs_attribute *lio_core_dev_attrs[] = {
1745         &target_core_attr_dev_info.attr,
1746         &target_core_attr_dev_control.attr,
1747         &target_core_attr_dev_alias.attr,
1748         &target_core_attr_dev_udev_path.attr,
1749         &target_core_attr_dev_enable.attr,
1750         &target_core_attr_dev_alua_lu_gp.attr,
1751         NULL,
1752 };
1753
1754 static void target_core_dev_release(struct config_item *item)
1755 {
1756         struct config_group *dev_cg = to_config_group(item);
1757         struct se_device *dev =
1758                 container_of(dev_cg, struct se_device, dev_group);
1759
1760         kfree(dev_cg->default_groups);
1761         target_free_device(dev);
1762 }
1763
1764 static ssize_t target_core_dev_show(struct config_item *item,
1765                                      struct configfs_attribute *attr,
1766                                      char *page)
1767 {
1768         struct config_group *dev_cg = to_config_group(item);
1769         struct se_device *dev =
1770                 container_of(dev_cg, struct se_device, dev_group);
1771         struct target_core_configfs_attribute *tc_attr = container_of(
1772                         attr, struct target_core_configfs_attribute, attr);
1773
1774         if (!tc_attr->show)
1775                 return -EINVAL;
1776
1777         return tc_attr->show(dev, page);
1778 }
1779
1780 static ssize_t target_core_dev_store(struct config_item *item,
1781                                       struct configfs_attribute *attr,
1782                                       const char *page, size_t count)
1783 {
1784         struct config_group *dev_cg = to_config_group(item);
1785         struct se_device *dev =
1786                 container_of(dev_cg, struct se_device, dev_group);
1787         struct target_core_configfs_attribute *tc_attr = container_of(
1788                         attr, struct target_core_configfs_attribute, attr);
1789
1790         if (!tc_attr->store)
1791                 return -EINVAL;
1792
1793         return tc_attr->store(dev, page, count);
1794 }
1795
1796 static struct configfs_item_operations target_core_dev_item_ops = {
1797         .release                = target_core_dev_release,
1798         .show_attribute         = target_core_dev_show,
1799         .store_attribute        = target_core_dev_store,
1800 };
1801
1802 static struct config_item_type target_core_dev_cit = {
1803         .ct_item_ops            = &target_core_dev_item_ops,
1804         .ct_attrs               = lio_core_dev_attrs,
1805         .ct_owner               = THIS_MODULE,
1806 };
1807
1808 /* End functions for struct config_item_type target_core_dev_cit */
1809
1810 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
1811
1812 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
1813 #define SE_DEV_ALUA_LU_ATTR(_name, _mode)                               \
1814 static struct target_core_alua_lu_gp_attribute                          \
1815                         target_core_alua_lu_gp_##_name =                \
1816         __CONFIGFS_EATTR(_name, _mode,                                  \
1817         target_core_alua_lu_gp_show_attr_##_name,                       \
1818         target_core_alua_lu_gp_store_attr_##_name);
1819
1820 #define SE_DEV_ALUA_LU_ATTR_RO(_name)                                   \
1821 static struct target_core_alua_lu_gp_attribute                          \
1822                         target_core_alua_lu_gp_##_name =                \
1823         __CONFIGFS_EATTR_RO(_name,                                      \
1824         target_core_alua_lu_gp_show_attr_##_name);
1825
1826 /*
1827  * lu_gp_id
1828  */
1829 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
1830         struct t10_alua_lu_gp *lu_gp,
1831         char *page)
1832 {
1833         if (!lu_gp->lu_gp_valid_id)
1834                 return 0;
1835
1836         return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
1837 }
1838
1839 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
1840         struct t10_alua_lu_gp *lu_gp,
1841         const char *page,
1842         size_t count)
1843 {
1844         struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
1845         unsigned long lu_gp_id;
1846         int ret;
1847
1848         ret = kstrtoul(page, 0, &lu_gp_id);
1849         if (ret < 0) {
1850                 pr_err("kstrtoul() returned %d for"
1851                         " lu_gp_id\n", ret);
1852                 return ret;
1853         }
1854         if (lu_gp_id > 0x0000ffff) {
1855                 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
1856                         " 0x0000ffff\n", lu_gp_id);
1857                 return -EINVAL;
1858         }
1859
1860         ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
1861         if (ret < 0)
1862                 return -EINVAL;
1863
1864         pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
1865                 " Group: core/alua/lu_gps/%s to ID: %hu\n",
1866                 config_item_name(&alua_lu_gp_cg->cg_item),
1867                 lu_gp->lu_gp_id);
1868
1869         return count;
1870 }
1871
1872 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
1873
1874 /*
1875  * members
1876  */
1877 static ssize_t target_core_alua_lu_gp_show_attr_members(
1878         struct t10_alua_lu_gp *lu_gp,
1879         char *page)
1880 {
1881         struct se_device *dev;
1882         struct se_hba *hba;
1883         struct t10_alua_lu_gp_member *lu_gp_mem;
1884         ssize_t len = 0, cur_len;
1885         unsigned char buf[LU_GROUP_NAME_BUF];
1886
1887         memset(buf, 0, LU_GROUP_NAME_BUF);
1888
1889         spin_lock(&lu_gp->lu_gp_lock);
1890         list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
1891                 dev = lu_gp_mem->lu_gp_mem_dev;
1892                 hba = dev->se_hba;
1893
1894                 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
1895                         config_item_name(&hba->hba_group.cg_item),
1896                         config_item_name(&dev->dev_group.cg_item));
1897                 cur_len++; /* Extra byte for NULL terminator */
1898
1899                 if ((cur_len + len) > PAGE_SIZE) {
1900                         pr_warn("Ran out of lu_gp_show_attr"
1901                                 "_members buffer\n");
1902                         break;
1903                 }
1904                 memcpy(page+len, buf, cur_len);
1905                 len += cur_len;
1906         }
1907         spin_unlock(&lu_gp->lu_gp_lock);
1908
1909         return len;
1910 }
1911
1912 SE_DEV_ALUA_LU_ATTR_RO(members);
1913
1914 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
1915
1916 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
1917         &target_core_alua_lu_gp_lu_gp_id.attr,
1918         &target_core_alua_lu_gp_members.attr,
1919         NULL,
1920 };
1921
1922 static void target_core_alua_lu_gp_release(struct config_item *item)
1923 {
1924         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1925                         struct t10_alua_lu_gp, lu_gp_group);
1926
1927         core_alua_free_lu_gp(lu_gp);
1928 }
1929
1930 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
1931         .release                = target_core_alua_lu_gp_release,
1932         .show_attribute         = target_core_alua_lu_gp_attr_show,
1933         .store_attribute        = target_core_alua_lu_gp_attr_store,
1934 };
1935
1936 static struct config_item_type target_core_alua_lu_gp_cit = {
1937         .ct_item_ops            = &target_core_alua_lu_gp_ops,
1938         .ct_attrs               = target_core_alua_lu_gp_attrs,
1939         .ct_owner               = THIS_MODULE,
1940 };
1941
1942 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
1943
1944 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
1945
1946 static struct config_group *target_core_alua_create_lu_gp(
1947         struct config_group *group,
1948         const char *name)
1949 {
1950         struct t10_alua_lu_gp *lu_gp;
1951         struct config_group *alua_lu_gp_cg = NULL;
1952         struct config_item *alua_lu_gp_ci = NULL;
1953
1954         lu_gp = core_alua_allocate_lu_gp(name, 0);
1955         if (IS_ERR(lu_gp))
1956                 return NULL;
1957
1958         alua_lu_gp_cg = &lu_gp->lu_gp_group;
1959         alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
1960
1961         config_group_init_type_name(alua_lu_gp_cg, name,
1962                         &target_core_alua_lu_gp_cit);
1963
1964         pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
1965                 " Group: core/alua/lu_gps/%s\n",
1966                 config_item_name(alua_lu_gp_ci));
1967
1968         return alua_lu_gp_cg;
1969
1970 }
1971
1972 static void target_core_alua_drop_lu_gp(
1973         struct config_group *group,
1974         struct config_item *item)
1975 {
1976         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1977                         struct t10_alua_lu_gp, lu_gp_group);
1978
1979         pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
1980                 " Group: core/alua/lu_gps/%s, ID: %hu\n",
1981                 config_item_name(item), lu_gp->lu_gp_id);
1982         /*
1983          * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
1984          * -> target_core_alua_lu_gp_release()
1985          */
1986         config_item_put(item);
1987 }
1988
1989 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
1990         .make_group             = &target_core_alua_create_lu_gp,
1991         .drop_item              = &target_core_alua_drop_lu_gp,
1992 };
1993
1994 static struct config_item_type target_core_alua_lu_gps_cit = {
1995         .ct_item_ops            = NULL,
1996         .ct_group_ops           = &target_core_alua_lu_gps_group_ops,
1997         .ct_owner               = THIS_MODULE,
1998 };
1999
2000 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2001
2002 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2003
2004 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2005 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode)                            \
2006 static struct target_core_alua_tg_pt_gp_attribute                       \
2007                         target_core_alua_tg_pt_gp_##_name =             \
2008         __CONFIGFS_EATTR(_name, _mode,                                  \
2009         target_core_alua_tg_pt_gp_show_attr_##_name,                    \
2010         target_core_alua_tg_pt_gp_store_attr_##_name);
2011
2012 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name)                                \
2013 static struct target_core_alua_tg_pt_gp_attribute                       \
2014                         target_core_alua_tg_pt_gp_##_name =             \
2015         __CONFIGFS_EATTR_RO(_name,                                      \
2016         target_core_alua_tg_pt_gp_show_attr_##_name);
2017
2018 /*
2019  * alua_access_state
2020  */
2021 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2022         struct t10_alua_tg_pt_gp *tg_pt_gp,
2023         char *page)
2024 {
2025         return sprintf(page, "%d\n",
2026                 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2027 }
2028
2029 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2030         struct t10_alua_tg_pt_gp *tg_pt_gp,
2031         const char *page,
2032         size_t count)
2033 {
2034         struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2035         unsigned long tmp;
2036         int new_state, ret;
2037
2038         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2039                 pr_err("Unable to do implict ALUA on non valid"
2040                         " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2041                 return -EINVAL;
2042         }
2043
2044         ret = kstrtoul(page, 0, &tmp);
2045         if (ret < 0) {
2046                 pr_err("Unable to extract new ALUA access state from"
2047                                 " %s\n", page);
2048                 return ret;
2049         }
2050         new_state = (int)tmp;
2051
2052         if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2053                 pr_err("Unable to process implict configfs ALUA"
2054                         " transition while TPGS_IMPLICT_ALUA is disabled\n");
2055                 return -EINVAL;
2056         }
2057
2058         ret = core_alua_do_port_transition(tg_pt_gp, dev,
2059                                         NULL, NULL, new_state, 0);
2060         return (!ret) ? count : -EINVAL;
2061 }
2062
2063 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2064
2065 /*
2066  * alua_access_status
2067  */
2068 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2069         struct t10_alua_tg_pt_gp *tg_pt_gp,
2070         char *page)
2071 {
2072         return sprintf(page, "%s\n",
2073                 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2074 }
2075
2076 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2077         struct t10_alua_tg_pt_gp *tg_pt_gp,
2078         const char *page,
2079         size_t count)
2080 {
2081         unsigned long tmp;
2082         int new_status, ret;
2083
2084         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2085                 pr_err("Unable to do set ALUA access status on non"
2086                         " valid tg_pt_gp ID: %hu\n",
2087                         tg_pt_gp->tg_pt_gp_valid_id);
2088                 return -EINVAL;
2089         }
2090
2091         ret = kstrtoul(page, 0, &tmp);
2092         if (ret < 0) {
2093                 pr_err("Unable to extract new ALUA access status"
2094                                 " from %s\n", page);
2095                 return ret;
2096         }
2097         new_status = (int)tmp;
2098
2099         if ((new_status != ALUA_STATUS_NONE) &&
2100             (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2101             (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2102                 pr_err("Illegal ALUA access status: 0x%02x\n",
2103                                 new_status);
2104                 return -EINVAL;
2105         }
2106
2107         tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2108         return count;
2109 }
2110
2111 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2112
2113 /*
2114  * alua_access_type
2115  */
2116 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2117         struct t10_alua_tg_pt_gp *tg_pt_gp,
2118         char *page)
2119 {
2120         return core_alua_show_access_type(tg_pt_gp, page);
2121 }
2122
2123 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2124         struct t10_alua_tg_pt_gp *tg_pt_gp,
2125         const char *page,
2126         size_t count)
2127 {
2128         return core_alua_store_access_type(tg_pt_gp, page, count);
2129 }
2130
2131 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2132
2133 /*
2134  * alua_write_metadata
2135  */
2136 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2137         struct t10_alua_tg_pt_gp *tg_pt_gp,
2138         char *page)
2139 {
2140         return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2141 }
2142
2143 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2144         struct t10_alua_tg_pt_gp *tg_pt_gp,
2145         const char *page,
2146         size_t count)
2147 {
2148         unsigned long tmp;
2149         int ret;
2150
2151         ret = kstrtoul(page, 0, &tmp);
2152         if (ret < 0) {
2153                 pr_err("Unable to extract alua_write_metadata\n");
2154                 return ret;
2155         }
2156
2157         if ((tmp != 0) && (tmp != 1)) {
2158                 pr_err("Illegal value for alua_write_metadata:"
2159                         " %lu\n", tmp);
2160                 return -EINVAL;
2161         }
2162         tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2163
2164         return count;
2165 }
2166
2167 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2168
2169
2170
2171 /*
2172  * nonop_delay_msecs
2173  */
2174 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2175         struct t10_alua_tg_pt_gp *tg_pt_gp,
2176         char *page)
2177 {
2178         return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2179
2180 }
2181
2182 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2183         struct t10_alua_tg_pt_gp *tg_pt_gp,
2184         const char *page,
2185         size_t count)
2186 {
2187         return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2188 }
2189
2190 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2191
2192 /*
2193  * trans_delay_msecs
2194  */
2195 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2196         struct t10_alua_tg_pt_gp *tg_pt_gp,
2197         char *page)
2198 {
2199         return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2200 }
2201
2202 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2203         struct t10_alua_tg_pt_gp *tg_pt_gp,
2204         const char *page,
2205         size_t count)
2206 {
2207         return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2208 }
2209
2210 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2211
2212 /*
2213  * implict_trans_secs
2214  */
2215 static ssize_t target_core_alua_tg_pt_gp_show_attr_implict_trans_secs(
2216         struct t10_alua_tg_pt_gp *tg_pt_gp,
2217         char *page)
2218 {
2219         return core_alua_show_implict_trans_secs(tg_pt_gp, page);
2220 }
2221
2222 static ssize_t target_core_alua_tg_pt_gp_store_attr_implict_trans_secs(
2223         struct t10_alua_tg_pt_gp *tg_pt_gp,
2224         const char *page,
2225         size_t count)
2226 {
2227         return core_alua_store_implict_trans_secs(tg_pt_gp, page, count);
2228 }
2229
2230 SE_DEV_ALUA_TG_PT_ATTR(implict_trans_secs, S_IRUGO | S_IWUSR);
2231
2232 /*
2233  * preferred
2234  */
2235
2236 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2237         struct t10_alua_tg_pt_gp *tg_pt_gp,
2238         char *page)
2239 {
2240         return core_alua_show_preferred_bit(tg_pt_gp, page);
2241 }
2242
2243 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2244         struct t10_alua_tg_pt_gp *tg_pt_gp,
2245         const char *page,
2246         size_t count)
2247 {
2248         return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2249 }
2250
2251 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2252
2253 /*
2254  * tg_pt_gp_id
2255  */
2256 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2257         struct t10_alua_tg_pt_gp *tg_pt_gp,
2258         char *page)
2259 {
2260         if (!tg_pt_gp->tg_pt_gp_valid_id)
2261                 return 0;
2262
2263         return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2264 }
2265
2266 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2267         struct t10_alua_tg_pt_gp *tg_pt_gp,
2268         const char *page,
2269         size_t count)
2270 {
2271         struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2272         unsigned long tg_pt_gp_id;
2273         int ret;
2274
2275         ret = kstrtoul(page, 0, &tg_pt_gp_id);
2276         if (ret < 0) {
2277                 pr_err("kstrtoul() returned %d for"
2278                         " tg_pt_gp_id\n", ret);
2279                 return ret;
2280         }
2281         if (tg_pt_gp_id > 0x0000ffff) {
2282                 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2283                         " 0x0000ffff\n", tg_pt_gp_id);
2284                 return -EINVAL;
2285         }
2286
2287         ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2288         if (ret < 0)
2289                 return -EINVAL;
2290
2291         pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2292                 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2293                 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2294                 tg_pt_gp->tg_pt_gp_id);
2295
2296         return count;
2297 }
2298
2299 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2300
2301 /*
2302  * members
2303  */
2304 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2305         struct t10_alua_tg_pt_gp *tg_pt_gp,
2306         char *page)
2307 {
2308         struct se_port *port;
2309         struct se_portal_group *tpg;
2310         struct se_lun *lun;
2311         struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2312         ssize_t len = 0, cur_len;
2313         unsigned char buf[TG_PT_GROUP_NAME_BUF];
2314
2315         memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2316
2317         spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2318         list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2319                         tg_pt_gp_mem_list) {
2320                 port = tg_pt_gp_mem->tg_pt;
2321                 tpg = port->sep_tpg;
2322                 lun = port->sep_lun;
2323
2324                 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2325                         "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2326                         tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2327                         tpg->se_tpg_tfo->tpg_get_tag(tpg),
2328                         config_item_name(&lun->lun_group.cg_item));
2329                 cur_len++; /* Extra byte for NULL terminator */
2330
2331                 if ((cur_len + len) > PAGE_SIZE) {
2332                         pr_warn("Ran out of lu_gp_show_attr"
2333                                 "_members buffer\n");
2334                         break;
2335                 }
2336                 memcpy(page+len, buf, cur_len);
2337                 len += cur_len;
2338         }
2339         spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2340
2341         return len;
2342 }
2343
2344 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2345
2346 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2347                         tg_pt_gp_group);
2348
2349 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2350         &target_core_alua_tg_pt_gp_alua_access_state.attr,
2351         &target_core_alua_tg_pt_gp_alua_access_status.attr,
2352         &target_core_alua_tg_pt_gp_alua_access_type.attr,
2353         &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2354         &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2355         &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2356         &target_core_alua_tg_pt_gp_implict_trans_secs.attr,
2357         &target_core_alua_tg_pt_gp_preferred.attr,
2358         &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2359         &target_core_alua_tg_pt_gp_members.attr,
2360         NULL,
2361 };
2362
2363 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2364 {
2365         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2366                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2367
2368         core_alua_free_tg_pt_gp(tg_pt_gp);
2369 }
2370
2371 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2372         .release                = target_core_alua_tg_pt_gp_release,
2373         .show_attribute         = target_core_alua_tg_pt_gp_attr_show,
2374         .store_attribute        = target_core_alua_tg_pt_gp_attr_store,
2375 };
2376
2377 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2378         .ct_item_ops            = &target_core_alua_tg_pt_gp_ops,
2379         .ct_attrs               = target_core_alua_tg_pt_gp_attrs,
2380         .ct_owner               = THIS_MODULE,
2381 };
2382
2383 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2384
2385 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2386
2387 static struct config_group *target_core_alua_create_tg_pt_gp(
2388         struct config_group *group,
2389         const char *name)
2390 {
2391         struct t10_alua *alua = container_of(group, struct t10_alua,
2392                                         alua_tg_pt_gps_group);
2393         struct t10_alua_tg_pt_gp *tg_pt_gp;
2394         struct config_group *alua_tg_pt_gp_cg = NULL;
2395         struct config_item *alua_tg_pt_gp_ci = NULL;
2396
2397         tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2398         if (!tg_pt_gp)
2399                 return NULL;
2400
2401         alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2402         alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2403
2404         config_group_init_type_name(alua_tg_pt_gp_cg, name,
2405                         &target_core_alua_tg_pt_gp_cit);
2406
2407         pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2408                 " Group: alua/tg_pt_gps/%s\n",
2409                 config_item_name(alua_tg_pt_gp_ci));
2410
2411         return alua_tg_pt_gp_cg;
2412 }
2413
2414 static void target_core_alua_drop_tg_pt_gp(
2415         struct config_group *group,
2416         struct config_item *item)
2417 {
2418         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2419                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2420
2421         pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2422                 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2423                 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2424         /*
2425          * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2426          * -> target_core_alua_tg_pt_gp_release().
2427          */
2428         config_item_put(item);
2429 }
2430
2431 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2432         .make_group             = &target_core_alua_create_tg_pt_gp,
2433         .drop_item              = &target_core_alua_drop_tg_pt_gp,
2434 };
2435
2436 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2437         .ct_group_ops           = &target_core_alua_tg_pt_gps_group_ops,
2438         .ct_owner               = THIS_MODULE,
2439 };
2440
2441 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2442
2443 /* Start functions for struct config_item_type target_core_alua_cit */
2444
2445 /*
2446  * target_core_alua_cit is a ConfigFS group that lives under
2447  * /sys/kernel/config/target/core/alua.  There are default groups
2448  * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2449  * target_core_alua_cit in target_core_init_configfs() below.
2450  */
2451 static struct config_item_type target_core_alua_cit = {
2452         .ct_item_ops            = NULL,
2453         .ct_attrs               = NULL,
2454         .ct_owner               = THIS_MODULE,
2455 };
2456
2457 /* End functions for struct config_item_type target_core_alua_cit */
2458
2459 /* Start functions for struct config_item_type target_core_stat_cit */
2460
2461 static struct config_group *target_core_stat_mkdir(
2462         struct config_group *group,
2463         const char *name)
2464 {
2465         return ERR_PTR(-ENOSYS);
2466 }
2467
2468 static void target_core_stat_rmdir(
2469         struct config_group *group,
2470         struct config_item *item)
2471 {
2472         return;
2473 }
2474
2475 static struct configfs_group_operations target_core_stat_group_ops = {
2476         .make_group             = &target_core_stat_mkdir,
2477         .drop_item              = &target_core_stat_rmdir,
2478 };
2479
2480 static struct config_item_type target_core_stat_cit = {
2481         .ct_group_ops           = &target_core_stat_group_ops,
2482         .ct_owner               = THIS_MODULE,
2483 };
2484
2485 /* End functions for struct config_item_type target_core_stat_cit */
2486
2487 /* Start functions for struct config_item_type target_core_hba_cit */
2488
2489 static struct config_group *target_core_make_subdev(
2490         struct config_group *group,
2491         const char *name)
2492 {
2493         struct t10_alua_tg_pt_gp *tg_pt_gp;
2494         struct se_subsystem_api *t;
2495         struct config_item *hba_ci = &group->cg_item;
2496         struct se_hba *hba = item_to_hba(hba_ci);
2497         struct se_device *dev;
2498         struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2499         struct config_group *dev_stat_grp = NULL;
2500         int errno = -ENOMEM, ret;
2501
2502         ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2503         if (ret)
2504                 return ERR_PTR(ret);
2505         /*
2506          * Locate the struct se_subsystem_api from parent's struct se_hba.
2507          */
2508         t = hba->transport;
2509
2510         dev = target_alloc_device(hba, name);
2511         if (!dev)
2512                 goto out_unlock;
2513
2514         dev_cg = &dev->dev_group;
2515
2516         dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
2517                         GFP_KERNEL);
2518         if (!dev_cg->default_groups)
2519                 goto out_free_device;
2520
2521         config_group_init_type_name(dev_cg, name, &target_core_dev_cit);
2522         config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2523                         &target_core_dev_attrib_cit);
2524         config_group_init_type_name(&dev->dev_pr_group, "pr",
2525                         &target_core_dev_pr_cit);
2526         config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2527                         &target_core_dev_wwn_cit);
2528         config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2529                         "alua", &target_core_alua_tg_pt_gps_cit);
2530         config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2531                         "statistics", &target_core_stat_cit);
2532
2533         dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
2534         dev_cg->default_groups[1] = &dev->dev_pr_group;
2535         dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
2536         dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
2537         dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
2538         dev_cg->default_groups[5] = NULL;
2539         /*
2540          * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2541          */
2542         tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2543         if (!tg_pt_gp)
2544                 goto out_free_dev_cg_default_groups;
2545         dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2546
2547         tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2548         tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2549                                 GFP_KERNEL);
2550         if (!tg_pt_gp_cg->default_groups) {
2551                 pr_err("Unable to allocate tg_pt_gp_cg->"
2552                                 "default_groups\n");
2553                 goto out_free_tg_pt_gp;
2554         }
2555
2556         config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2557                         "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2558         tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2559         tg_pt_gp_cg->default_groups[1] = NULL;
2560         /*
2561          * Add core/$HBA/$DEV/statistics/ default groups
2562          */
2563         dev_stat_grp = &dev->dev_stat_grps.stat_group;
2564         dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
2565                                 GFP_KERNEL);
2566         if (!dev_stat_grp->default_groups) {
2567                 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2568                 goto out_free_tg_pt_gp_cg_default_groups;
2569         }
2570         target_stat_setup_dev_default_groups(dev);
2571
2572         mutex_unlock(&hba->hba_access_mutex);
2573         return dev_cg;
2574
2575 out_free_tg_pt_gp_cg_default_groups:
2576         kfree(tg_pt_gp_cg->default_groups);
2577 out_free_tg_pt_gp:
2578         core_alua_free_tg_pt_gp(tg_pt_gp);
2579 out_free_dev_cg_default_groups:
2580         kfree(dev_cg->default_groups);
2581 out_free_device:
2582         target_free_device(dev);
2583 out_unlock:
2584         mutex_unlock(&hba->hba_access_mutex);
2585         return ERR_PTR(errno);
2586 }
2587
2588 static void target_core_drop_subdev(
2589         struct config_group *group,
2590         struct config_item *item)
2591 {
2592         struct config_group *dev_cg = to_config_group(item);
2593         struct se_device *dev =
2594                 container_of(dev_cg, struct se_device, dev_group);
2595         struct se_hba *hba;
2596         struct config_item *df_item;
2597         struct config_group *tg_pt_gp_cg, *dev_stat_grp;
2598         int i;
2599
2600         hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
2601
2602         mutex_lock(&hba->hba_access_mutex);
2603
2604         dev_stat_grp = &dev->dev_stat_grps.stat_group;
2605         for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2606                 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2607                 dev_stat_grp->default_groups[i] = NULL;
2608                 config_item_put(df_item);
2609         }
2610         kfree(dev_stat_grp->default_groups);
2611
2612         tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2613         for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2614                 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2615                 tg_pt_gp_cg->default_groups[i] = NULL;
2616                 config_item_put(df_item);
2617         }
2618         kfree(tg_pt_gp_cg->default_groups);
2619         /*
2620          * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2621          * directly from target_core_alua_tg_pt_gp_release().
2622          */
2623         dev->t10_alua.default_tg_pt_gp = NULL;
2624
2625         for (i = 0; dev_cg->default_groups[i]; i++) {
2626                 df_item = &dev_cg->default_groups[i]->cg_item;
2627                 dev_cg->default_groups[i] = NULL;
2628                 config_item_put(df_item);
2629         }
2630         /*
2631          * se_dev is released from target_core_dev_item_ops->release()
2632          */
2633         config_item_put(item);
2634         mutex_unlock(&hba->hba_access_mutex);
2635 }
2636
2637 static struct configfs_group_operations target_core_hba_group_ops = {
2638         .make_group             = target_core_make_subdev,
2639         .drop_item              = target_core_drop_subdev,
2640 };
2641
2642 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2643 #define SE_HBA_ATTR(_name, _mode)                               \
2644 static struct target_core_hba_attribute                         \
2645                 target_core_hba_##_name =                       \
2646                 __CONFIGFS_EATTR(_name, _mode,                  \
2647                 target_core_hba_show_attr_##_name,              \
2648                 target_core_hba_store_attr_##_name);
2649
2650 #define SE_HBA_ATTR_RO(_name)                                   \
2651 static struct target_core_hba_attribute                         \
2652                 target_core_hba_##_name =                       \
2653                 __CONFIGFS_EATTR_RO(_name,                      \
2654                 target_core_hba_show_attr_##_name);
2655
2656 static ssize_t target_core_hba_show_attr_hba_info(
2657         struct se_hba *hba,
2658         char *page)
2659 {
2660         return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2661                         hba->hba_id, hba->transport->name,
2662                         TARGET_CORE_CONFIGFS_VERSION);
2663 }
2664
2665 SE_HBA_ATTR_RO(hba_info);
2666
2667 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2668                                 char *page)
2669 {
2670         int hba_mode = 0;
2671
2672         if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2673                 hba_mode = 1;
2674
2675         return sprintf(page, "%d\n", hba_mode);
2676 }
2677
2678 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2679                                 const char *page, size_t count)
2680 {
2681         struct se_subsystem_api *transport = hba->transport;
2682         unsigned long mode_flag;
2683         int ret;
2684
2685         if (transport->pmode_enable_hba == NULL)
2686                 return -EINVAL;
2687
2688         ret = kstrtoul(page, 0, &mode_flag);
2689         if (ret < 0) {
2690                 pr_err("Unable to extract hba mode flag: %d\n", ret);
2691                 return ret;
2692         }
2693
2694         if (hba->dev_count) {
2695                 pr_err("Unable to set hba_mode with active devices\n");
2696                 return -EINVAL;
2697         }
2698
2699         ret = transport->pmode_enable_hba(hba, mode_flag);
2700         if (ret < 0)
2701                 return -EINVAL;
2702         if (ret > 0)
2703                 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2704         else if (ret == 0)
2705                 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2706
2707         return count;
2708 }
2709
2710 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2711
2712 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2713
2714 static void target_core_hba_release(struct config_item *item)
2715 {
2716         struct se_hba *hba = container_of(to_config_group(item),
2717                                 struct se_hba, hba_group);
2718         core_delete_hba(hba);
2719 }
2720
2721 static struct configfs_attribute *target_core_hba_attrs[] = {
2722         &target_core_hba_hba_info.attr,
2723         &target_core_hba_hba_mode.attr,
2724         NULL,
2725 };
2726
2727 static struct configfs_item_operations target_core_hba_item_ops = {
2728         .release                = target_core_hba_release,
2729         .show_attribute         = target_core_hba_attr_show,
2730         .store_attribute        = target_core_hba_attr_store,
2731 };
2732
2733 static struct config_item_type target_core_hba_cit = {
2734         .ct_item_ops            = &target_core_hba_item_ops,
2735         .ct_group_ops           = &target_core_hba_group_ops,
2736         .ct_attrs               = target_core_hba_attrs,
2737         .ct_owner               = THIS_MODULE,
2738 };
2739
2740 static struct config_group *target_core_call_addhbatotarget(
2741         struct config_group *group,
2742         const char *name)
2743 {
2744         char *se_plugin_str, *str, *str2;
2745         struct se_hba *hba;
2746         char buf[TARGET_CORE_NAME_MAX_LEN];
2747         unsigned long plugin_dep_id = 0;
2748         int ret;
2749
2750         memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
2751         if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
2752                 pr_err("Passed *name strlen(): %d exceeds"
2753                         " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
2754                         TARGET_CORE_NAME_MAX_LEN);
2755                 return ERR_PTR(-ENAMETOOLONG);
2756         }
2757         snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
2758
2759         str = strstr(buf, "_");
2760         if (!str) {
2761                 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
2762                 return ERR_PTR(-EINVAL);
2763         }
2764         se_plugin_str = buf;
2765         /*
2766          * Special case for subsystem plugins that have "_" in their names.
2767          * Namely rd_direct and rd_mcp..
2768          */
2769         str2 = strstr(str+1, "_");
2770         if (str2) {
2771                 *str2 = '\0'; /* Terminate for *se_plugin_str */
2772                 str2++; /* Skip to start of plugin dependent ID */
2773                 str = str2;
2774         } else {
2775                 *str = '\0'; /* Terminate for *se_plugin_str */
2776                 str++; /* Skip to start of plugin dependent ID */
2777         }
2778
2779         ret = kstrtoul(str, 0, &plugin_dep_id);
2780         if (ret < 0) {
2781                 pr_err("kstrtoul() returned %d for"
2782                                 " plugin_dep_id\n", ret);
2783                 return ERR_PTR(ret);
2784         }
2785         /*
2786          * Load up TCM subsystem plugins if they have not already been loaded.
2787          */
2788         transport_subsystem_check_init();
2789
2790         hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
2791         if (IS_ERR(hba))
2792                 return ERR_CAST(hba);
2793
2794         config_group_init_type_name(&hba->hba_group, name,
2795                         &target_core_hba_cit);
2796
2797         return &hba->hba_group;
2798 }
2799
2800 static void target_core_call_delhbafromtarget(
2801         struct config_group *group,
2802         struct config_item *item)
2803 {
2804         /*
2805          * core_delete_hba() is called from target_core_hba_item_ops->release()
2806          * -> target_core_hba_release()
2807          */
2808         config_item_put(item);
2809 }
2810
2811 static struct configfs_group_operations target_core_group_ops = {
2812         .make_group     = target_core_call_addhbatotarget,
2813         .drop_item      = target_core_call_delhbafromtarget,
2814 };
2815
2816 static struct config_item_type target_core_cit = {
2817         .ct_item_ops    = NULL,
2818         .ct_group_ops   = &target_core_group_ops,
2819         .ct_attrs       = NULL,
2820         .ct_owner       = THIS_MODULE,
2821 };
2822
2823 /* Stop functions for struct config_item_type target_core_hba_cit */
2824
2825 static int __init target_core_init_configfs(void)
2826 {
2827         struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
2828         struct config_group *lu_gp_cg = NULL;
2829         struct configfs_subsystem *subsys;
2830         struct t10_alua_lu_gp *lu_gp;
2831         int ret;
2832
2833         pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
2834                 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
2835                 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
2836
2837         subsys = target_core_subsystem[0];
2838         config_group_init(&subsys->su_group);
2839         mutex_init(&subsys->su_mutex);
2840
2841         ret = init_se_kmem_caches();
2842         if (ret < 0)
2843                 return ret;
2844         /*
2845          * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
2846          * and ALUA Logical Unit Group and Target Port Group infrastructure.
2847          */
2848         target_cg = &subsys->su_group;
2849         target_cg->default_groups = kmalloc(sizeof(struct config_group) * 2,
2850                                 GFP_KERNEL);
2851         if (!target_cg->default_groups) {
2852                 pr_err("Unable to allocate target_cg->default_groups\n");
2853                 ret = -ENOMEM;
2854                 goto out_global;
2855         }
2856
2857         config_group_init_type_name(&target_core_hbagroup,
2858                         "core", &target_core_cit);
2859         target_cg->default_groups[0] = &target_core_hbagroup;
2860         target_cg->default_groups[1] = NULL;
2861         /*
2862          * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
2863          */
2864         hba_cg = &target_core_hbagroup;
2865         hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2866                                 GFP_KERNEL);
2867         if (!hba_cg->default_groups) {
2868                 pr_err("Unable to allocate hba_cg->default_groups\n");
2869                 ret = -ENOMEM;
2870                 goto out_global;
2871         }
2872         config_group_init_type_name(&alua_group,
2873                         "alua", &target_core_alua_cit);
2874         hba_cg->default_groups[0] = &alua_group;
2875         hba_cg->default_groups[1] = NULL;
2876         /*
2877          * Add ALUA Logical Unit Group and Target Port Group ConfigFS
2878          * groups under /sys/kernel/config/target/core/alua/
2879          */
2880         alua_cg = &alua_group;
2881         alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2882                         GFP_KERNEL);
2883         if (!alua_cg->default_groups) {
2884                 pr_err("Unable to allocate alua_cg->default_groups\n");
2885                 ret = -ENOMEM;
2886                 goto out_global;
2887         }
2888
2889         config_group_init_type_name(&alua_lu_gps_group,
2890                         "lu_gps", &target_core_alua_lu_gps_cit);
2891         alua_cg->default_groups[0] = &alua_lu_gps_group;
2892         alua_cg->default_groups[1] = NULL;
2893         /*
2894          * Add core/alua/lu_gps/default_lu_gp
2895          */
2896         lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
2897         if (IS_ERR(lu_gp)) {
2898                 ret = -ENOMEM;
2899                 goto out_global;
2900         }
2901
2902         lu_gp_cg = &alua_lu_gps_group;
2903         lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2904                         GFP_KERNEL);
2905         if (!lu_gp_cg->default_groups) {
2906                 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
2907                 ret = -ENOMEM;
2908                 goto out_global;
2909         }
2910
2911         config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
2912                                 &target_core_alua_lu_gp_cit);
2913         lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
2914         lu_gp_cg->default_groups[1] = NULL;
2915         default_lu_gp = lu_gp;
2916         /*
2917          * Register the target_core_mod subsystem with configfs.
2918          */
2919         ret = configfs_register_subsystem(subsys);
2920         if (ret < 0) {
2921                 pr_err("Error %d while registering subsystem %s\n",
2922                         ret, subsys->su_group.cg_item.ci_namebuf);
2923                 goto out_global;
2924         }
2925         pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
2926                 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
2927                 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
2928         /*
2929          * Register built-in RAMDISK subsystem logic for virtual LUN 0
2930          */
2931         ret = rd_module_init();
2932         if (ret < 0)
2933                 goto out;
2934
2935         ret = core_dev_setup_virtual_lun0();
2936         if (ret < 0)
2937                 goto out;
2938
2939         ret = target_xcopy_setup_pt();
2940         if (ret < 0)
2941                 goto out;
2942
2943         return 0;
2944
2945 out:
2946         configfs_unregister_subsystem(subsys);
2947         core_dev_release_virtual_lun0();
2948         rd_module_exit();
2949 out_global:
2950         if (default_lu_gp) {
2951                 core_alua_free_lu_gp(default_lu_gp);
2952                 default_lu_gp = NULL;
2953         }
2954         if (lu_gp_cg)
2955                 kfree(lu_gp_cg->default_groups);
2956         if (alua_cg)
2957                 kfree(alua_cg->default_groups);
2958         if (hba_cg)
2959                 kfree(hba_cg->default_groups);
2960         kfree(target_cg->default_groups);
2961         release_se_kmem_caches();
2962         return ret;
2963 }
2964
2965 static void __exit target_core_exit_configfs(void)
2966 {
2967         struct configfs_subsystem *subsys;
2968         struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
2969         struct config_item *item;
2970         int i;
2971
2972         subsys = target_core_subsystem[0];
2973
2974         lu_gp_cg = &alua_lu_gps_group;
2975         for (i = 0; lu_gp_cg->default_groups[i]; i++) {
2976                 item = &lu_gp_cg->default_groups[i]->cg_item;
2977                 lu_gp_cg->default_groups[i] = NULL;
2978                 config_item_put(item);
2979         }
2980         kfree(lu_gp_cg->default_groups);
2981         lu_gp_cg->default_groups = NULL;
2982
2983         alua_cg = &alua_group;
2984         for (i = 0; alua_cg->default_groups[i]; i++) {
2985                 item = &alua_cg->default_groups[i]->cg_item;
2986                 alua_cg->default_groups[i] = NULL;
2987                 config_item_put(item);
2988         }
2989         kfree(alua_cg->default_groups);
2990         alua_cg->default_groups = NULL;
2991
2992         hba_cg = &target_core_hbagroup;
2993         for (i = 0; hba_cg->default_groups[i]; i++) {
2994                 item = &hba_cg->default_groups[i]->cg_item;
2995                 hba_cg->default_groups[i] = NULL;
2996                 config_item_put(item);
2997         }
2998         kfree(hba_cg->default_groups);
2999         hba_cg->default_groups = NULL;
3000         /*
3001          * We expect subsys->su_group.default_groups to be released
3002          * by configfs subsystem provider logic..
3003          */
3004         configfs_unregister_subsystem(subsys);
3005         kfree(subsys->su_group.default_groups);
3006
3007         core_alua_free_lu_gp(default_lu_gp);
3008         default_lu_gp = NULL;
3009
3010         pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3011                         " Infrastructure\n");
3012
3013         core_dev_release_virtual_lun0();
3014         rd_module_exit();
3015         target_xcopy_release_pt();
3016         release_se_kmem_caches();
3017 }
3018
3019 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3020 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3021 MODULE_LICENSE("GPL");
3022
3023 module_init(target_core_init_configfs);
3024 module_exit(target_core_exit_configfs);