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 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs)              \
  54 static void target_core_setup_##_name##_cit(struct se_subsystem_api *sa) \
  55 {                                                                       \
  56         struct target_backend_cits *tbc = &sa->tb_cits;                 \
  57         struct config_item_type *cit = &tbc->tb_##_name##_cit;          \
  58                                                                         \
  59         cit->ct_item_ops = _item_ops;                                   \
  60         cit->ct_group_ops = _group_ops;                                 \
  61         cit->ct_attrs = _attrs;                                         \
  62         cit->ct_owner = sa->owner;                                      \
  63         pr_debug("Setup generic %s\n", __stringify(_name));             \
  64 }
  65
  66 extern struct t10_alua_lu_gp *default_lu_gp;
  67
  68 static LIST_HEAD(g_tf_list);
  69 static DEFINE_MUTEX(g_tf_lock);
  70
  71 struct target_core_configfs_attribute {
  72         struct configfs_attribute attr;
  73         ssize_t (*show)(void *, char *);
  74         ssize_t (*store)(void *, const char *, size_t);
  75 };
  76
  77 static struct config_group target_core_hbagroup;
  78 static struct config_group alua_group;
  79 static struct config_group alua_lu_gps_group;
  80
  81 static inline struct se_hba *
  82 item_to_hba(struct config_item *item)
  83 {
  84         return container_of(to_config_group(item), struct se_hba, hba_group);
  85 }
  86
  87 /*
  88  * Attributes for /sys/kernel/config/target/
  89  */
  90 static ssize_t target_core_attr_show(struct config_item *item,
  91                                       struct configfs_attribute *attr,
  92                                       char *page)
  93 {
  94         return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
  95                 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
  96                 utsname()->sysname, utsname()->machine);
  97 }
  98
  99 static struct configfs_item_operations target_core_fabric_item_ops = {
 100         .show_attribute = target_core_attr_show,
 101 };
 102
 103 static struct configfs_attribute target_core_item_attr_version = {
 104         .ca_owner       = THIS_MODULE,
 105         .ca_name        = "version",
 106         .ca_mode        = S_IRUGO,
 107 };
 108
 109 static struct target_fabric_configfs *target_core_get_fabric(
 110         const char *name)
 111 {
 112         struct target_fabric_configfs *tf;
 113
 114         if (!name)
 115                 return NULL;
 116
 117         mutex_lock(&g_tf_lock);
 118         list_for_each_entry(tf, &g_tf_list, tf_list) {
 119                 if (!strcmp(tf->tf_name, name)) {
 120                         atomic_inc(&tf->tf_access_cnt);
 121                         mutex_unlock(&g_tf_lock);
 122                         return tf;
 123                 }
 124         }
 125         mutex_unlock(&g_tf_lock);
 126
 127         return NULL;
 128 }
 129
 130 /*
 131  * Called from struct target_core_group_ops->make_group()
 132  */
 133 static struct config_group *target_core_register_fabric(
 134         struct config_group *group,
 135         const char *name)
 136 {
 137         struct target_fabric_configfs *tf;
 138         int ret;
 139
 140         pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
 141                         " %s\n", group, name);
 142
 143         tf = target_core_get_fabric(name);
 144         if (!tf) {
 145                 pr_debug("target_core_register_fabric() trying autoload for %s\n",
 146                          name);
 147
 148                 /*
 149                  * Below are some hardcoded request_module() calls to automatically
 150                  * local fabric modules when the following is called:
 151                  *
 152                  * mkdir -p /sys/kernel/config/target/$MODULE_NAME
 153                  *
 154                  * Note that this does not limit which TCM fabric module can be
 155                  * registered, but simply provids auto loading logic for modules with
 156                  * mkdir(2) system calls with known TCM fabric modules.
 157                  */
 158
 159                 if (!strncmp(name, "iscsi", 5)) {
 160                         /*
 161                          * Automatically load the LIO Target fabric module when the
 162                          * following is called:
 163                          *
 164                          * mkdir -p $CONFIGFS/target/iscsi
 165                          */
 166                         ret = request_module("iscsi_target_mod");
 167                         if (ret < 0) {
 168                                 pr_debug("request_module() failed for"
 169                                          " iscsi_target_mod.ko: %d\n", ret);
 170                                 return ERR_PTR(-EINVAL);
 171                         }
 172                 } else if (!strncmp(name, "loopback", 8)) {
 173                         /*
 174                          * Automatically load the tcm_loop fabric module when the
 175                          * following is called:
 176                          *
 177                          * mkdir -p $CONFIGFS/target/loopback
 178                          */
 179                         ret = request_module("tcm_loop");
 180                         if (ret < 0) {
 181                                 pr_debug("request_module() failed for"
 182                                          " tcm_loop.ko: %d\n", ret);
 183                                 return ERR_PTR(-EINVAL);
 184                         }
 185                 }
 186
 187                 tf = target_core_get_fabric(name);
 188         }
 189
 190         if (!tf) {
 191                 pr_debug("target_core_get_fabric() failed for %s\n",
 192                          name);
 193                 return ERR_PTR(-EINVAL);
 194         }
 195         pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
 196                         " %s\n", tf->tf_name);
 197         /*
 198          * On a successful target_core_get_fabric() look, the returned
 199          * struct target_fabric_configfs *tf will contain a usage reference.
 200          */
 201         pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
 202                         &tf->tf_cit_tmpl.tfc_wwn_cit);
 203
 204         tf->tf_group.default_groups = tf->tf_default_groups;
 205         tf->tf_group.default_groups[0] = &tf->tf_disc_group;
 206         tf->tf_group.default_groups[1] = NULL;
 207
 208         config_group_init_type_name(&tf->tf_group, name,
 209                         &tf->tf_cit_tmpl.tfc_wwn_cit);
 210         config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
 211                         &tf->tf_cit_tmpl.tfc_discovery_cit);
 212
 213         pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
 214                         " %s\n", tf->tf_group.cg_item.ci_name);
 215         tf->tf_fabric = &tf->tf_group.cg_item;
 216         pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
 217                         " for %s\n", name);
 218
 219         return &tf->tf_group;
 220 }
 221
 222 /*
 223  * Called from struct target_core_group_ops->drop_item()
 224  */
 225 static void target_core_deregister_fabric(
 226         struct config_group *group,
 227         struct config_item *item)
 228 {
 229         struct target_fabric_configfs *tf = container_of(
 230                 to_config_group(item), struct target_fabric_configfs, tf_group);
 231         struct config_group *tf_group;
 232         struct config_item *df_item;
 233         int i;
 234
 235         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
 236                 " tf list\n", config_item_name(item));
 237
 238         pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
 239                         " %s\n", tf->tf_name);
 240         atomic_dec(&tf->tf_access_cnt);
 241
 242         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
 243                         " tf->tf_fabric for %s\n", tf->tf_name);
 244         tf->tf_fabric = NULL;
 245
 246         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
 247                         " %s\n", config_item_name(item));
 248
 249         tf_group = &tf->tf_group;
 250         for (i = 0; tf_group->default_groups[i]; i++) {
 251                 df_item = &tf_group->default_groups[i]->cg_item;
 252                 tf_group->default_groups[i] = NULL;
 253                 config_item_put(df_item);
 254         }
 255         config_item_put(item);
 256 }
 257
 258 static struct configfs_group_operations target_core_fabric_group_ops = {
 259         .make_group     = &target_core_register_fabric,
 260         .drop_item      = &target_core_deregister_fabric,
 261 };
 262
 263 /*
 264  * All item attributes appearing in /sys/kernel/target/ appear here.
 265  */
 266 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
 267         &target_core_item_attr_version,
 268         NULL,
 269 };
 270
 271 /*
 272  * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
 273  */
 274 static struct config_item_type target_core_fabrics_item = {
 275         .ct_item_ops    = &target_core_fabric_item_ops,
 276         .ct_group_ops   = &target_core_fabric_group_ops,
 277         .ct_attrs       = target_core_fabric_item_attrs,
 278         .ct_owner       = THIS_MODULE,
 279 };
 280
 281 static struct configfs_subsystem target_core_fabrics = {
 282         .su_group = {
 283                 .cg_item = {
 284                         .ci_namebuf = "target",
 285                         .ci_type = &target_core_fabrics_item,
 286                 },
 287         },
 288 };
 289
 290 int target_depend_item(struct config_item *item)
 291 {
 292         return configfs_depend_item(&target_core_fabrics, item);
 293 }
 294 EXPORT_SYMBOL(target_depend_item);
 295
 296 void target_undepend_item(struct config_item *item)
 297 {
 298         return configfs_undepend_item(&target_core_fabrics, item);
 299 }
 300 EXPORT_SYMBOL(target_undepend_item);
 301
 302 /*##############################################################################
 303 // Start functions called by external Target Fabrics Modules
 304 //############################################################################*/
 305
 306 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
 307 {
 308         if (!tfo->name) {
 309                 pr_err("Missing tfo->name\n");
 310                 return -EINVAL;
 311         }
 312         if (strlen(tfo->name) >= TARGET_FABRIC_NAME_SIZE) {
 313                 pr_err("Passed name: %s exceeds TARGET_FABRIC"
 314                         "_NAME_SIZE\n", tfo->name);
 315                 return -EINVAL;
 316         }
 317         if (!tfo->get_fabric_name) {
 318                 pr_err("Missing tfo->get_fabric_name()\n");
 319                 return -EINVAL;
 320         }
 321         if (!tfo->get_fabric_proto_ident) {
 322                 pr_err("Missing tfo->get_fabric_proto_ident()\n");
 323                 return -EINVAL;
 324         }
 325         if (!tfo->tpg_get_wwn) {
 326                 pr_err("Missing tfo->tpg_get_wwn()\n");
 327                 return -EINVAL;
 328         }
 329         if (!tfo->tpg_get_tag) {
 330                 pr_err("Missing tfo->tpg_get_tag()\n");
 331                 return -EINVAL;
 332         }
 333         if (!tfo->tpg_get_pr_transport_id) {
 334                 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
 335                 return -EINVAL;
 336         }
 337         if (!tfo->tpg_get_pr_transport_id_len) {
 338                 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
 339                 return -EINVAL;
 340         }
 341         if (!tfo->tpg_check_demo_mode) {
 342                 pr_err("Missing tfo->tpg_check_demo_mode()\n");
 343                 return -EINVAL;
 344         }
 345         if (!tfo->tpg_check_demo_mode_cache) {
 346                 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
 347                 return -EINVAL;
 348         }
 349         if (!tfo->tpg_check_demo_mode_write_protect) {
 350                 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
 351                 return -EINVAL;
 352         }
 353         if (!tfo->tpg_check_prod_mode_write_protect) {
 354                 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
 355                 return -EINVAL;
 356         }
 357         if (!tfo->tpg_get_inst_index) {
 358                 pr_err("Missing tfo->tpg_get_inst_index()\n");
 359                 return -EINVAL;
 360         }
 361         if (!tfo->release_cmd) {
 362                 pr_err("Missing tfo->release_cmd()\n");
 363                 return -EINVAL;
 364         }
 365         if (!tfo->shutdown_session) {
 366                 pr_err("Missing tfo->shutdown_session()\n");
 367                 return -EINVAL;
 368         }
 369         if (!tfo->close_session) {
 370                 pr_err("Missing tfo->close_session()\n");
 371                 return -EINVAL;
 372         }
 373         if (!tfo->sess_get_index) {
 374                 pr_err("Missing tfo->sess_get_index()\n");
 375                 return -EINVAL;
 376         }
 377         if (!tfo->write_pending) {
 378                 pr_err("Missing tfo->write_pending()\n");
 379                 return -EINVAL;
 380         }
 381         if (!tfo->write_pending_status) {
 382                 pr_err("Missing tfo->write_pending_status()\n");
 383                 return -EINVAL;
 384         }
 385         if (!tfo->set_default_node_attributes) {
 386                 pr_err("Missing tfo->set_default_node_attributes()\n");
 387                 return -EINVAL;
 388         }
 389         if (!tfo->get_task_tag) {
 390                 pr_err("Missing tfo->get_task_tag()\n");
 391                 return -EINVAL;
 392         }
 393         if (!tfo->get_cmd_state) {
 394                 pr_err("Missing tfo->get_cmd_state()\n");
 395                 return -EINVAL;
 396         }
 397         if (!tfo->queue_data_in) {
 398                 pr_err("Missing tfo->queue_data_in()\n");
 399                 return -EINVAL;
 400         }
 401         if (!tfo->queue_status) {
 402                 pr_err("Missing tfo->queue_status()\n");
 403                 return -EINVAL;
 404         }
 405         if (!tfo->queue_tm_rsp) {
 406                 pr_err("Missing tfo->queue_tm_rsp()\n");
 407                 return -EINVAL;
 408         }
 409         if (!tfo->aborted_task) {
 410                 pr_err("Missing tfo->aborted_task()\n");
 411                 return -EINVAL;
 412         }
 413         /*
 414          * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
 415          * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
 416          * target_core_fabric_configfs.c WWN+TPG group context code.
 417          */
 418         if (!tfo->fabric_make_wwn) {
 419                 pr_err("Missing tfo->fabric_make_wwn()\n");
 420                 return -EINVAL;
 421         }
 422         if (!tfo->fabric_drop_wwn) {
 423                 pr_err("Missing tfo->fabric_drop_wwn()\n");
 424                 return -EINVAL;
 425         }
 426         if (!tfo->fabric_make_tpg) {
 427                 pr_err("Missing tfo->fabric_make_tpg()\n");
 428                 return -EINVAL;
 429         }
 430         if (!tfo->fabric_drop_tpg) {
 431                 pr_err("Missing tfo->fabric_drop_tpg()\n");
 432                 return -EINVAL;
 433         }
 434
 435         return 0;
 436 }
 437
 438 int target_register_template(const struct target_core_fabric_ops *fo)
 439 {
 440         struct target_fabric_configfs *tf;
 441         int ret;
 442
 443         ret = target_fabric_tf_ops_check(fo);
 444         if (ret)
 445                 return ret;
 446
 447         tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
 448         if (!tf) {
 449                 pr_err("%s: could not allocate memory!\n", __func__);
 450                 return -ENOMEM;
 451         }
 452
 453         INIT_LIST_HEAD(&tf->tf_list);
 454         atomic_set(&tf->tf_access_cnt, 0);
 455
 456         /*
 457          * Setup the default generic struct config_item_type's (cits) in
 458          * struct target_fabric_configfs->tf_cit_tmpl
 459          */
 460         tf->tf_module = fo->module;
 461         snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", fo->name);
 462
 463         tf->tf_ops = *fo;
 464         target_fabric_setup_cits(tf);
 465
 466         mutex_lock(&g_tf_lock);
 467         list_add_tail(&tf->tf_list, &g_tf_list);
 468         mutex_unlock(&g_tf_lock);
 469
 470         return 0;
 471 }
 472 EXPORT_SYMBOL(target_register_template);
 473
 474 void target_unregister_template(const struct target_core_fabric_ops *fo)
 475 {
 476         struct target_fabric_configfs *t;
 477
 478         mutex_lock(&g_tf_lock);
 479         list_for_each_entry(t, &g_tf_list, tf_list) {
 480                 if (!strcmp(t->tf_name, fo->name)) {
 481                         BUG_ON(atomic_read(&t->tf_access_cnt));
 482                         list_del(&t->tf_list);
 483                         kfree(t);
 484                         break;
 485                 }
 486         }
 487         mutex_unlock(&g_tf_lock);
 488 }
 489 EXPORT_SYMBOL(target_unregister_template);
 490
 491 /*##############################################################################
 492 // Stop functions called by external Target Fabrics Modules
 493 //############################################################################*/
 494
 495 /* Start functions for struct config_item_type tb_dev_attrib_cit */
 496
 497 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
 498 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
 499
 500 static struct configfs_item_operations target_core_dev_attrib_ops = {
 501         .show_attribute         = target_core_dev_attrib_attr_show,
 502         .store_attribute        = target_core_dev_attrib_attr_store,
 503 };
 504
 505 TB_CIT_SETUP(dev_attrib, &target_core_dev_attrib_ops, NULL, NULL);
 506
 507 /* End functions for struct config_item_type tb_dev_attrib_cit */
 508
 509 /*  Start functions for struct config_item_type tb_dev_wwn_cit */
 510
 511 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
 512 #define SE_DEV_WWN_ATTR(_name, _mode)                                   \
 513 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
 514                 __CONFIGFS_EATTR(_name, _mode,                          \
 515                 target_core_dev_wwn_show_attr_##_name,                  \
 516                 target_core_dev_wwn_store_attr_##_name);
 517
 518 #define SE_DEV_WWN_ATTR_RO(_name);                                      \
 519 do {                                                                    \
 520         static struct target_core_dev_wwn_attribute                     \
 521                         target_core_dev_wwn_##_name =                   \
 522                 __CONFIGFS_EATTR_RO(_name,                              \
 523                 target_core_dev_wwn_show_attr_##_name);                 \
 524 } while (0);
 525
 526 /*
 527  * VPD page 0x80 Unit serial
 528  */
 529 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
 530         struct t10_wwn *t10_wwn,
 531         char *page)
 532 {
 533         return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
 534                 &t10_wwn->unit_serial[0]);
 535 }
 536
 537 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
 538         struct t10_wwn *t10_wwn,
 539         const char *page,
 540         size_t count)
 541 {
 542         struct se_device *dev = t10_wwn->t10_dev;
 543         unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
 544
 545         /*
 546          * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
 547          * from the struct scsi_device level firmware, do not allow
 548          * VPD Unit Serial to be emulated.
 549          *
 550          * Note this struct scsi_device could also be emulating VPD
 551          * information from its drivers/scsi LLD.  But for now we assume
 552          * it is doing 'the right thing' wrt a world wide unique
 553          * VPD Unit Serial Number that OS dependent multipath can depend on.
 554          */
 555         if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
 556                 pr_err("Underlying SCSI device firmware provided VPD"
 557                         " Unit Serial, ignoring request\n");
 558                 return -EOPNOTSUPP;
 559         }
 560
 561         if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
 562                 pr_err("Emulated VPD Unit Serial exceeds"
 563                 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
 564                 return -EOVERFLOW;
 565         }
 566         /*
 567          * Check to see if any active $FABRIC_MOD exports exist.  If they
 568          * do exist, fail here as changing this information on the fly
 569          * (underneath the initiator side OS dependent multipath code)
 570          * could cause negative effects.
 571          */
 572         if (dev->export_count) {
 573                 pr_err("Unable to set VPD Unit Serial while"
 574                         " active %d $FABRIC_MOD exports exist\n",
 575                         dev->export_count);
 576                 return -EINVAL;
 577         }
 578
 579         /*
 580          * This currently assumes ASCII encoding for emulated VPD Unit Serial.
 581          *
 582          * Also, strip any newline added from the userspace
 583          * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
 584          */
 585         memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
 586         snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
 587         snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
 588                         "%s", strstrip(buf));
 589         dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
 590
 591         pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
 592                         " %s\n", dev->t10_wwn.unit_serial);
 593
 594         return count;
 595 }
 596
 597 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
 598
 599 /*
 600  * VPD page 0x83 Protocol Identifier
 601  */
 602 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
 603         struct t10_wwn *t10_wwn,
 604         char *page)
 605 {
 606         struct t10_vpd *vpd;
 607         unsigned char buf[VPD_TMP_BUF_SIZE];
 608         ssize_t len = 0;
 609
 610         memset(buf, 0, VPD_TMP_BUF_SIZE);
 611
 612         spin_lock(&t10_wwn->t10_vpd_lock);
 613         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
 614                 if (!vpd->protocol_identifier_set)
 615                         continue;
 616
 617                 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
 618
 619                 if (len + strlen(buf) >= PAGE_SIZE)
 620                         break;
 621
 622                 len += sprintf(page+len, "%s", buf);
 623         }
 624         spin_unlock(&t10_wwn->t10_vpd_lock);
 625
 626         return len;
 627 }
 628
 629 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
 630         struct t10_wwn *t10_wwn,
 631         const char *page,
 632         size_t count)
 633 {
 634         return -ENOSYS;
 635 }
 636
 637 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
 638
 639 /*
 640  * Generic wrapper for dumping VPD identifiers by association.
 641  */
 642 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc)                           \
 643 static ssize_t target_core_dev_wwn_show_attr_##_name(                   \
 644         struct t10_wwn *t10_wwn,                                        \
 645         char *page)                                                     \
 646 {                                                                       \
 647         struct t10_vpd *vpd;                                                    \
 648         unsigned char buf[VPD_TMP_BUF_SIZE];                            \
 649         ssize_t len = 0;                                                \
 650                                                                         \
 651         spin_lock(&t10_wwn->t10_vpd_lock);                              \
 652         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {    \
 653                 if (vpd->association != _assoc)                         \
 654                         continue;                                       \
 655                                                                         \
 656                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 657                 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE);   \
 658                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 659                         break;                                          \
 660                 len += sprintf(page+len, "%s", buf);                    \
 661                                                                         \
 662                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 663                 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
 664                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 665                         break;                                          \
 666                 len += sprintf(page+len, "%s", buf);                    \
 667                                                                         \
 668                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 669                 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
 670                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 671                         break;                                          \
 672                 len += sprintf(page+len, "%s", buf);                    \
 673         }                                                               \
 674         spin_unlock(&t10_wwn->t10_vpd_lock);                            \
 675                                                                         \
 676         return len;                                                     \
 677 }
 678
 679 /*
 680  * VPD page 0x83 Association: Logical Unit
 681  */
 682 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
 683
 684 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
 685         struct t10_wwn *t10_wwn,
 686         const char *page,
 687         size_t count)
 688 {
 689         return -ENOSYS;
 690 }
 691
 692 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
 693
 694 /*
 695  * VPD page 0x83 Association: Target Port
 696  */
 697 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
 698
 699 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
 700         struct t10_wwn *t10_wwn,
 701         const char *page,
 702         size_t count)
 703 {
 704         return -ENOSYS;
 705 }
 706
 707 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
 708
 709 /*
 710  * VPD page 0x83 Association: SCSI Target Device
 711  */
 712 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
 713
 714 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
 715         struct t10_wwn *t10_wwn,
 716         const char *page,
 717         size_t count)
 718 {
 719         return -ENOSYS;
 720 }
 721
 722 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
 723
 724 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
 725
 726 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
 727         &target_core_dev_wwn_vpd_unit_serial.attr,
 728         &target_core_dev_wwn_vpd_protocol_identifier.attr,
 729         &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
 730         &target_core_dev_wwn_vpd_assoc_target_port.attr,
 731         &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
 732         NULL,
 733 };
 734
 735 static struct configfs_item_operations target_core_dev_wwn_ops = {
 736         .show_attribute         = target_core_dev_wwn_attr_show,
 737         .store_attribute        = target_core_dev_wwn_attr_store,
 738 };
 739
 740 TB_CIT_SETUP(dev_wwn, &target_core_dev_wwn_ops, NULL, target_core_dev_wwn_attrs);
 741
 742 /*  End functions for struct config_item_type tb_dev_wwn_cit */
 743
 744 /*  Start functions for struct config_item_type tb_dev_pr_cit */
 745
 746 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
 747 #define SE_DEV_PR_ATTR(_name, _mode)                                    \
 748 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
 749         __CONFIGFS_EATTR(_name, _mode,                                  \
 750         target_core_dev_pr_show_attr_##_name,                           \
 751         target_core_dev_pr_store_attr_##_name);
 752
 753 #define SE_DEV_PR_ATTR_RO(_name);                                       \
 754 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
 755         __CONFIGFS_EATTR_RO(_name,                                      \
 756         target_core_dev_pr_show_attr_##_name);
 757
 758 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
 759                 char *page)
 760 {
 761         struct se_node_acl *se_nacl;
 762         struct t10_pr_registration *pr_reg;
 763         char i_buf[PR_REG_ISID_ID_LEN];
 764
 765         memset(i_buf, 0, PR_REG_ISID_ID_LEN);
 766
 767         pr_reg = dev->dev_pr_res_holder;
 768         if (!pr_reg)
 769                 return sprintf(page, "No SPC-3 Reservation holder\n");
 770
 771         se_nacl = pr_reg->pr_reg_nacl;
 772         core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
 773
 774         return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
 775                 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
 776                 se_nacl->initiatorname, i_buf);
 777 }
 778
 779 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
 780                 char *page)
 781 {
 782         struct se_node_acl *se_nacl;
 783         ssize_t len;
 784
 785         se_nacl = dev->dev_reserved_node_acl;
 786         if (se_nacl) {
 787                 len = sprintf(page,
 788                               "SPC-2 Reservation: %s Initiator: %s\n",
 789                               se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
 790                               se_nacl->initiatorname);
 791         } else {
 792                 len = sprintf(page, "No SPC-2 Reservation holder\n");
 793         }
 794         return len;
 795 }
 796
 797 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
 798                 char *page)
 799 {
 800         int ret;
 801
 802         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
 803                 return sprintf(page, "Passthrough\n");
 804
 805         spin_lock(&dev->dev_reservation_lock);
 806         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
 807                 ret = target_core_dev_pr_show_spc2_res(dev, page);
 808         else
 809                 ret = target_core_dev_pr_show_spc3_res(dev, page);
 810         spin_unlock(&dev->dev_reservation_lock);
 811         return ret;
 812 }
 813
 814 SE_DEV_PR_ATTR_RO(res_holder);
 815
 816 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
 817                 struct se_device *dev, char *page)
 818 {
 819         ssize_t len = 0;
 820
 821         spin_lock(&dev->dev_reservation_lock);
 822         if (!dev->dev_pr_res_holder) {
 823                 len = sprintf(page, "No SPC-3 Reservation holder\n");
 824         } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
 825                 len = sprintf(page, "SPC-3 Reservation: All Target"
 826                         " Ports registration\n");
 827         } else {
 828                 len = sprintf(page, "SPC-3 Reservation: Single"
 829                         " Target Port registration\n");
 830         }
 831
 832         spin_unlock(&dev->dev_reservation_lock);
 833         return len;
 834 }
 835
 836 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
 837
 838 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
 839                 struct se_device *dev, char *page)
 840 {
 841         return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
 842 }
 843
 844 SE_DEV_PR_ATTR_RO(res_pr_generation);
 845
 846 /*
 847  * res_pr_holder_tg_port
 848  */
 849 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
 850                 struct se_device *dev, char *page)
 851 {
 852         struct se_node_acl *se_nacl;
 853         struct se_lun *lun;
 854         struct se_portal_group *se_tpg;
 855         struct t10_pr_registration *pr_reg;
 856         const struct target_core_fabric_ops *tfo;
 857         ssize_t len = 0;
 858
 859         spin_lock(&dev->dev_reservation_lock);
 860         pr_reg = dev->dev_pr_res_holder;
 861         if (!pr_reg) {
 862                 len = sprintf(page, "No SPC-3 Reservation holder\n");
 863                 goto out_unlock;
 864         }
 865
 866         se_nacl = pr_reg->pr_reg_nacl;
 867         se_tpg = se_nacl->se_tpg;
 868         lun = pr_reg->pr_reg_tg_pt_lun;
 869         tfo = se_tpg->se_tpg_tfo;
 870
 871         len += sprintf(page+len, "SPC-3 Reservation: %s"
 872                 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
 873                 tfo->tpg_get_wwn(se_tpg));
 874         len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
 875                 " Identifier Tag: %hu %s Portal Group Tag: %hu"
 876                 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
 877                 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
 878                 tfo->get_fabric_name(), lun->unpacked_lun);
 879
 880 out_unlock:
 881         spin_unlock(&dev->dev_reservation_lock);
 882         return len;
 883 }
 884
 885 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
 886
 887 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
 888                 struct se_device *dev, char *page)
 889 {
 890         const struct target_core_fabric_ops *tfo;
 891         struct t10_pr_registration *pr_reg;
 892         unsigned char buf[384];
 893         char i_buf[PR_REG_ISID_ID_LEN];
 894         ssize_t len = 0;
 895         int reg_count = 0;
 896
 897         len += sprintf(page+len, "SPC-3 PR Registrations:\n");
 898
 899         spin_lock(&dev->t10_pr.registration_lock);
 900         list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
 901                         pr_reg_list) {
 902
 903                 memset(buf, 0, 384);
 904                 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
 905                 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
 906                 core_pr_dump_initiator_port(pr_reg, i_buf,
 907                                         PR_REG_ISID_ID_LEN);
 908                 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
 909                         tfo->get_fabric_name(),
 910                         pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
 911                         pr_reg->pr_res_generation);
 912
 913                 if (len + strlen(buf) >= PAGE_SIZE)
 914                         break;
 915
 916                 len += sprintf(page+len, "%s", buf);
 917                 reg_count++;
 918         }
 919         spin_unlock(&dev->t10_pr.registration_lock);
 920
 921         if (!reg_count)
 922                 len += sprintf(page+len, "None\n");
 923
 924         return len;
 925 }
 926
 927 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
 928
 929 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
 930                 struct se_device *dev, char *page)
 931 {
 932         struct t10_pr_registration *pr_reg;
 933         ssize_t len = 0;
 934
 935         spin_lock(&dev->dev_reservation_lock);
 936         pr_reg = dev->dev_pr_res_holder;
 937         if (pr_reg) {
 938                 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
 939                         core_scsi3_pr_dump_type(pr_reg->pr_res_type));
 940         } else {
 941                 len = sprintf(page, "No SPC-3 Reservation holder\n");
 942         }
 943
 944         spin_unlock(&dev->dev_reservation_lock);
 945         return len;
 946 }
 947
 948 SE_DEV_PR_ATTR_RO(res_pr_type);
 949
 950 static ssize_t target_core_dev_pr_show_attr_res_type(
 951                 struct se_device *dev, char *page)
 952 {
 953         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
 954                 return sprintf(page, "SPC_PASSTHROUGH\n");
 955         else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
 956                 return sprintf(page, "SPC2_RESERVATIONS\n");
 957         else
 958                 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
 959 }
 960
 961 SE_DEV_PR_ATTR_RO(res_type);
 962
 963 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
 964                 struct se_device *dev, char *page)
 965 {
 966         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
 967                 return 0;
 968
 969         return sprintf(page, "APTPL Bit Status: %s\n",
 970                 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
 971 }
 972
 973 SE_DEV_PR_ATTR_RO(res_aptpl_active);
 974
 975 /*
 976  * res_aptpl_metadata
 977  */
 978 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
 979                 struct se_device *dev, char *page)
 980 {
 981         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
 982                 return 0;
 983
 984         return sprintf(page, "Ready to process PR APTPL metadata..\n");
 985 }
 986
 987 enum {
 988         Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
 989         Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
 990         Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
 991         Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
 992 };
 993
 994 static match_table_t tokens = {
 995         {Opt_initiator_fabric, "initiator_fabric=%s"},
 996         {Opt_initiator_node, "initiator_node=%s"},
 997         {Opt_initiator_sid, "initiator_sid=%s"},
 998         {Opt_sa_res_key, "sa_res_key=%s"},
 999         {Opt_res_holder, "res_holder=%d"},
1000         {Opt_res_type, "res_type=%d"},
1001         {Opt_res_scope, "res_scope=%d"},
1002         {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1003         {Opt_mapped_lun, "mapped_lun=%d"},
1004         {Opt_target_fabric, "target_fabric=%s"},
1005         {Opt_target_node, "target_node=%s"},
1006         {Opt_tpgt, "tpgt=%d"},
1007         {Opt_port_rtpi, "port_rtpi=%d"},
1008         {Opt_target_lun, "target_lun=%d"},
1009         {Opt_err, NULL}
1010 };
1011
1012 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1013         struct se_device *dev,
1014         const char *page,
1015         size_t count)
1016 {
1017         unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1018         unsigned char *t_fabric = NULL, *t_port = NULL;
1019         char *orig, *ptr, *opts;
1020         substring_t args[MAX_OPT_ARGS];
1021         unsigned long long tmp_ll;
1022         u64 sa_res_key = 0;
1023         u32 mapped_lun = 0, target_lun = 0;
1024         int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1025         u16 port_rpti = 0, tpgt = 0;
1026         u8 type = 0, scope;
1027
1028         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1029                 return 0;
1030         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1031                 return 0;
1032
1033         if (dev->export_count) {
1034                 pr_debug("Unable to process APTPL metadata while"
1035                         " active fabric exports exist\n");
1036                 return -EINVAL;
1037         }
1038
1039         opts = kstrdup(page, GFP_KERNEL);
1040         if (!opts)
1041                 return -ENOMEM;
1042
1043         orig = opts;
1044         while ((ptr = strsep(&opts, ",\n")) != NULL) {
1045                 if (!*ptr)
1046                         continue;
1047
1048                 token = match_token(ptr, tokens, args);
1049                 switch (token) {
1050                 case Opt_initiator_fabric:
1051                         i_fabric = match_strdup(args);
1052                         if (!i_fabric) {
1053                                 ret = -ENOMEM;
1054                                 goto out;
1055                         }
1056                         break;
1057                 case Opt_initiator_node:
1058                         i_port = match_strdup(args);
1059                         if (!i_port) {
1060                                 ret = -ENOMEM;
1061                                 goto out;
1062                         }
1063                         if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1064                                 pr_err("APTPL metadata initiator_node="
1065                                         " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1066                                         PR_APTPL_MAX_IPORT_LEN);
1067                                 ret = -EINVAL;
1068                                 break;
1069                         }
1070                         break;
1071                 case Opt_initiator_sid:
1072                         isid = match_strdup(args);
1073                         if (!isid) {
1074                                 ret = -ENOMEM;
1075                                 goto out;
1076                         }
1077                         if (strlen(isid) >= PR_REG_ISID_LEN) {
1078                                 pr_err("APTPL metadata initiator_isid"
1079                                         "= exceeds PR_REG_ISID_LEN: %d\n",
1080                                         PR_REG_ISID_LEN);
1081                                 ret = -EINVAL;
1082                                 break;
1083                         }
1084                         break;
1085                 case Opt_sa_res_key:
1086                         ret = kstrtoull(args->from, 0, &tmp_ll);
1087                         if (ret < 0) {
1088                                 pr_err("kstrtoull() failed for sa_res_key=\n");
1089                                 goto out;
1090                         }
1091                         sa_res_key = (u64)tmp_ll;
1092                         break;
1093                 /*
1094                  * PR APTPL Metadata for Reservation
1095                  */
1096                 case Opt_res_holder:
1097                         match_int(args, &arg);
1098                         res_holder = arg;
1099                         break;
1100                 case Opt_res_type:
1101                         match_int(args, &arg);
1102                         type = (u8)arg;
1103                         break;
1104                 case Opt_res_scope:
1105                         match_int(args, &arg);
1106                         scope = (u8)arg;
1107                         break;
1108                 case Opt_res_all_tg_pt:
1109                         match_int(args, &arg);
1110                         all_tg_pt = (int)arg;
1111                         break;
1112                 case Opt_mapped_lun:
1113                         match_int(args, &arg);
1114                         mapped_lun = (u32)arg;
1115                         break;
1116                 /*
1117                  * PR APTPL Metadata for Target Port
1118                  */
1119                 case Opt_target_fabric:
1120                         t_fabric = match_strdup(args);
1121                         if (!t_fabric) {
1122                                 ret = -ENOMEM;
1123                                 goto out;
1124                         }
1125                         break;
1126                 case Opt_target_node:
1127                         t_port = match_strdup(args);
1128                         if (!t_port) {
1129                                 ret = -ENOMEM;
1130                                 goto out;
1131                         }
1132                         if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1133                                 pr_err("APTPL metadata target_node="
1134                                         " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1135                                         PR_APTPL_MAX_TPORT_LEN);
1136                                 ret = -EINVAL;
1137                                 break;
1138                         }
1139                         break;
1140                 case Opt_tpgt:
1141                         match_int(args, &arg);
1142                         tpgt = (u16)arg;
1143                         break;
1144                 case Opt_port_rtpi:
1145                         match_int(args, &arg);
1146                         port_rpti = (u16)arg;
1147                         break;
1148                 case Opt_target_lun:
1149                         match_int(args, &arg);
1150                         target_lun = (u32)arg;
1151                         break;
1152                 default:
1153                         break;
1154                 }
1155         }
1156
1157         if (!i_port || !t_port || !sa_res_key) {
1158                 pr_err("Illegal parameters for APTPL registration\n");
1159                 ret = -EINVAL;
1160                 goto out;
1161         }
1162
1163         if (res_holder && !(type)) {
1164                 pr_err("Illegal PR type: 0x%02x for reservation"
1165                                 " holder\n", type);
1166                 ret = -EINVAL;
1167                 goto out;
1168         }
1169
1170         ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1171                         i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1172                         res_holder, all_tg_pt, type);
1173 out:
1174         kfree(i_fabric);
1175         kfree(i_port);
1176         kfree(isid);
1177         kfree(t_fabric);
1178         kfree(t_port);
1179         kfree(orig);
1180         return (ret == 0) ? count : ret;
1181 }
1182
1183 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1184
1185 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
1186
1187 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1188         &target_core_dev_pr_res_holder.attr,
1189         &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1190         &target_core_dev_pr_res_pr_generation.attr,
1191         &target_core_dev_pr_res_pr_holder_tg_port.attr,
1192         &target_core_dev_pr_res_pr_registered_i_pts.attr,
1193         &target_core_dev_pr_res_pr_type.attr,
1194         &target_core_dev_pr_res_type.attr,
1195         &target_core_dev_pr_res_aptpl_active.attr,
1196         &target_core_dev_pr_res_aptpl_metadata.attr,
1197         NULL,
1198 };
1199
1200 static struct configfs_item_operations target_core_dev_pr_ops = {
1201         .show_attribute         = target_core_dev_pr_attr_show,
1202         .store_attribute        = target_core_dev_pr_attr_store,
1203 };
1204
1205 TB_CIT_SETUP(dev_pr, &target_core_dev_pr_ops, NULL, target_core_dev_pr_attrs);
1206
1207 /*  End functions for struct config_item_type tb_dev_pr_cit */
1208
1209 /*  Start functions for struct config_item_type tb_dev_cit */
1210
1211 static ssize_t target_core_show_dev_info(void *p, char *page)
1212 {
1213         struct se_device *dev = p;
1214         struct se_subsystem_api *t = dev->transport;
1215         int bl = 0;
1216         ssize_t read_bytes = 0;
1217
1218         transport_dump_dev_state(dev, page, &bl);
1219         read_bytes += bl;
1220         read_bytes += t->show_configfs_dev_params(dev, page+read_bytes);
1221         return read_bytes;
1222 }
1223
1224 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1225         .attr   = { .ca_owner = THIS_MODULE,
1226                     .ca_name = "info",
1227                     .ca_mode = S_IRUGO },
1228         .show   = target_core_show_dev_info,
1229         .store  = NULL,
1230 };
1231
1232 static ssize_t target_core_store_dev_control(
1233         void *p,
1234         const char *page,
1235         size_t count)
1236 {
1237         struct se_device *dev = p;
1238         struct se_subsystem_api *t = dev->transport;
1239
1240         return t->set_configfs_dev_params(dev, page, count);
1241 }
1242
1243 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1244         .attr   = { .ca_owner = THIS_MODULE,
1245                     .ca_name = "control",
1246                     .ca_mode = S_IWUSR },
1247         .show   = NULL,
1248         .store  = target_core_store_dev_control,
1249 };
1250
1251 static ssize_t target_core_show_dev_alias(void *p, char *page)
1252 {
1253         struct se_device *dev = p;
1254
1255         if (!(dev->dev_flags & DF_USING_ALIAS))
1256                 return 0;
1257
1258         return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1259 }
1260
1261 static ssize_t target_core_store_dev_alias(
1262         void *p,
1263         const char *page,
1264         size_t count)
1265 {
1266         struct se_device *dev = p;
1267         struct se_hba *hba = dev->se_hba;
1268         ssize_t read_bytes;
1269
1270         if (count > (SE_DEV_ALIAS_LEN-1)) {
1271                 pr_err("alias count: %d exceeds"
1272                         " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1273                         SE_DEV_ALIAS_LEN-1);
1274                 return -EINVAL;
1275         }
1276
1277         read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1278         if (!read_bytes)
1279                 return -EINVAL;
1280         if (dev->dev_alias[read_bytes - 1] == '\n')
1281                 dev->dev_alias[read_bytes - 1] = '\0';
1282
1283         dev->dev_flags |= DF_USING_ALIAS;
1284
1285         pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1286                 config_item_name(&hba->hba_group.cg_item),
1287                 config_item_name(&dev->dev_group.cg_item),
1288                 dev->dev_alias);
1289
1290         return read_bytes;
1291 }
1292
1293 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1294         .attr   = { .ca_owner = THIS_MODULE,
1295                     .ca_name = "alias",
1296                     .ca_mode =  S_IRUGO | S_IWUSR },
1297         .show   = target_core_show_dev_alias,
1298         .store  = target_core_store_dev_alias,
1299 };
1300
1301 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1302 {
1303         struct se_device *dev = p;
1304
1305         if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1306                 return 0;
1307
1308         return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1309 }
1310
1311 static ssize_t target_core_store_dev_udev_path(
1312         void *p,
1313         const char *page,
1314         size_t count)
1315 {
1316         struct se_device *dev = p;
1317         struct se_hba *hba = dev->se_hba;
1318         ssize_t read_bytes;
1319
1320         if (count > (SE_UDEV_PATH_LEN-1)) {
1321                 pr_err("udev_path count: %d exceeds"
1322                         " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1323                         SE_UDEV_PATH_LEN-1);
1324                 return -EINVAL;
1325         }
1326
1327         read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1328                         "%s", page);
1329         if (!read_bytes)
1330                 return -EINVAL;
1331         if (dev->udev_path[read_bytes - 1] == '\n')
1332                 dev->udev_path[read_bytes - 1] = '\0';
1333
1334         dev->dev_flags |= DF_USING_UDEV_PATH;
1335
1336         pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1337                 config_item_name(&hba->hba_group.cg_item),
1338                 config_item_name(&dev->dev_group.cg_item),
1339                 dev->udev_path);
1340
1341         return read_bytes;
1342 }
1343
1344 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1345         .attr   = { .ca_owner = THIS_MODULE,
1346                     .ca_name = "udev_path",
1347                     .ca_mode =  S_IRUGO | S_IWUSR },
1348         .show   = target_core_show_dev_udev_path,
1349         .store  = target_core_store_dev_udev_path,
1350 };
1351
1352 static ssize_t target_core_show_dev_enable(void *p, char *page)
1353 {
1354         struct se_device *dev = p;
1355
1356         return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1357 }
1358
1359 static ssize_t target_core_store_dev_enable(
1360         void *p,
1361         const char *page,
1362         size_t count)
1363 {
1364         struct se_device *dev = p;
1365         char *ptr;
1366         int ret;
1367
1368         ptr = strstr(page, "1");
1369         if (!ptr) {
1370                 pr_err("For dev_enable ops, only valid value"
1371                                 " is \"1\"\n");
1372                 return -EINVAL;
1373         }
1374
1375         ret = target_configure_device(dev);
1376         if (ret)
1377                 return ret;
1378         return count;
1379 }
1380
1381 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1382         .attr   = { .ca_owner = THIS_MODULE,
1383                     .ca_name = "enable",
1384                     .ca_mode =  S_IRUGO | S_IWUSR },
1385         .show   = target_core_show_dev_enable,
1386         .store  = target_core_store_dev_enable,
1387 };
1388
1389 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1390 {
1391         struct se_device *dev = p;
1392         struct config_item *lu_ci;
1393         struct t10_alua_lu_gp *lu_gp;
1394         struct t10_alua_lu_gp_member *lu_gp_mem;
1395         ssize_t len = 0;
1396
1397         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1398         if (!lu_gp_mem)
1399                 return 0;
1400
1401         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1402         lu_gp = lu_gp_mem->lu_gp;
1403         if (lu_gp) {
1404                 lu_ci = &lu_gp->lu_gp_group.cg_item;
1405                 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1406                         config_item_name(lu_ci), lu_gp->lu_gp_id);
1407         }
1408         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1409
1410         return len;
1411 }
1412
1413 static ssize_t target_core_store_alua_lu_gp(
1414         void *p,
1415         const char *page,
1416         size_t count)
1417 {
1418         struct se_device *dev = p;
1419         struct se_hba *hba = dev->se_hba;
1420         struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1421         struct t10_alua_lu_gp_member *lu_gp_mem;
1422         unsigned char buf[LU_GROUP_NAME_BUF];
1423         int move = 0;
1424
1425         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1426         if (!lu_gp_mem)
1427                 return 0;
1428
1429         if (count > LU_GROUP_NAME_BUF) {
1430                 pr_err("ALUA LU Group Alias too large!\n");
1431                 return -EINVAL;
1432         }
1433         memset(buf, 0, LU_GROUP_NAME_BUF);
1434         memcpy(buf, page, count);
1435         /*
1436          * Any ALUA logical unit alias besides "NULL" means we will be
1437          * making a new group association.
1438          */
1439         if (strcmp(strstrip(buf), "NULL")) {
1440                 /*
1441                  * core_alua_get_lu_gp_by_name() will increment reference to
1442                  * struct t10_alua_lu_gp.  This reference is released with
1443                  * core_alua_get_lu_gp_by_name below().
1444                  */
1445                 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1446                 if (!lu_gp_new)
1447                         return -ENODEV;
1448         }
1449
1450         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1451         lu_gp = lu_gp_mem->lu_gp;
1452         if (lu_gp) {
1453                 /*
1454                  * Clearing an existing lu_gp association, and replacing
1455                  * with NULL
1456                  */
1457                 if (!lu_gp_new) {
1458                         pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1459                                 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1460                                 " %hu\n",
1461                                 config_item_name(&hba->hba_group.cg_item),
1462                                 config_item_name(&dev->dev_group.cg_item),
1463                                 config_item_name(&lu_gp->lu_gp_group.cg_item),
1464                                 lu_gp->lu_gp_id);
1465
1466                         __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1467                         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1468
1469                         return count;
1470                 }
1471                 /*
1472                  * Removing existing association of lu_gp_mem with lu_gp
1473                  */
1474                 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1475                 move = 1;
1476         }
1477         /*
1478          * Associate lu_gp_mem with lu_gp_new.
1479          */
1480         __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1481         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1482
1483         pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1484                 " core/alua/lu_gps/%s, ID: %hu\n",
1485                 (move) ? "Moving" : "Adding",
1486                 config_item_name(&hba->hba_group.cg_item),
1487                 config_item_name(&dev->dev_group.cg_item),
1488                 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1489                 lu_gp_new->lu_gp_id);
1490
1491         core_alua_put_lu_gp_from_name(lu_gp_new);
1492         return count;
1493 }
1494
1495 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1496         .attr   = { .ca_owner = THIS_MODULE,
1497                     .ca_name = "alua_lu_gp",
1498                     .ca_mode = S_IRUGO | S_IWUSR },
1499         .show   = target_core_show_alua_lu_gp,
1500         .store  = target_core_store_alua_lu_gp,
1501 };
1502
1503 static ssize_t target_core_show_dev_lba_map(void *p, char *page)
1504 {
1505         struct se_device *dev = p;
1506         struct t10_alua_lba_map *map;
1507         struct t10_alua_lba_map_member *mem;
1508         char *b = page;
1509         int bl = 0;
1510         char state;
1511
1512         spin_lock(&dev->t10_alua.lba_map_lock);
1513         if (!list_empty(&dev->t10_alua.lba_map_list))
1514             bl += sprintf(b + bl, "%u %u\n",
1515                           dev->t10_alua.lba_map_segment_size,
1516                           dev->t10_alua.lba_map_segment_multiplier);
1517         list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
1518                 bl += sprintf(b + bl, "%llu %llu",
1519                               map->lba_map_first_lba, map->lba_map_last_lba);
1520                 list_for_each_entry(mem, &map->lba_map_mem_list,
1521                                     lba_map_mem_list) {
1522                         switch (mem->lba_map_mem_alua_state) {
1523                         case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
1524                                 state = 'O';
1525                                 break;
1526                         case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
1527                                 state = 'A';
1528                                 break;
1529                         case ALUA_ACCESS_STATE_STANDBY:
1530                                 state = 'S';
1531                                 break;
1532                         case ALUA_ACCESS_STATE_UNAVAILABLE:
1533                                 state = 'U';
1534                                 break;
1535                         default:
1536                                 state = '.';
1537                                 break;
1538                         }
1539                         bl += sprintf(b + bl, " %d:%c",
1540                                       mem->lba_map_mem_alua_pg_id, state);
1541                 }
1542                 bl += sprintf(b + bl, "\n");
1543         }
1544         spin_unlock(&dev->t10_alua.lba_map_lock);
1545         return bl;
1546 }
1547
1548 static ssize_t target_core_store_dev_lba_map(
1549         void *p,
1550         const char *page,
1551         size_t count)
1552 {
1553         struct se_device *dev = p;
1554         struct t10_alua_lba_map *lba_map = NULL;
1555         struct list_head lba_list;
1556         char *map_entries, *ptr;
1557         char state;
1558         int pg_num = -1, pg;
1559         int ret = 0, num = 0, pg_id, alua_state;
1560         unsigned long start_lba = -1, end_lba = -1;
1561         unsigned long segment_size = -1, segment_mult = -1;
1562
1563         map_entries = kstrdup(page, GFP_KERNEL);
1564         if (!map_entries)
1565                 return -ENOMEM;
1566
1567         INIT_LIST_HEAD(&lba_list);
1568         while ((ptr = strsep(&map_entries, "\n")) != NULL) {
1569                 if (!*ptr)
1570                         continue;
1571
1572                 if (num == 0) {
1573                         if (sscanf(ptr, "%lu %lu\n",
1574                                    &segment_size, &segment_mult) != 2) {
1575                                 pr_err("Invalid line %d\n", num);
1576                                 ret = -EINVAL;
1577                                 break;
1578                         }
1579                         num++;
1580                         continue;
1581                 }
1582                 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
1583                         pr_err("Invalid line %d\n", num);
1584                         ret = -EINVAL;
1585                         break;
1586                 }
1587                 ptr = strchr(ptr, ' ');
1588                 if (!ptr) {
1589                         pr_err("Invalid line %d, missing end lba\n", num);
1590                         ret = -EINVAL;
1591                         break;
1592                 }
1593                 ptr++;
1594                 ptr = strchr(ptr, ' ');
1595                 if (!ptr) {
1596                         pr_err("Invalid line %d, missing state definitions\n",
1597                                num);
1598                         ret = -EINVAL;
1599                         break;
1600                 }
1601                 ptr++;
1602                 lba_map = core_alua_allocate_lba_map(&lba_list,
1603                                                      start_lba, end_lba);
1604                 if (IS_ERR(lba_map)) {
1605                         ret = PTR_ERR(lba_map);
1606                         break;
1607                 }
1608                 pg = 0;
1609                 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
1610                         switch (state) {
1611                         case 'O':
1612                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
1613                                 break;
1614                         case 'A':
1615                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
1616                                 break;
1617                         case 'S':
1618                                 alua_state = ALUA_ACCESS_STATE_STANDBY;
1619                                 break;
1620                         case 'U':
1621                                 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
1622                                 break;
1623                         default:
1624                                 pr_err("Invalid ALUA state '%c'\n", state);
1625                                 ret = -EINVAL;
1626                                 goto out;
1627                         }
1628
1629                         ret = core_alua_allocate_lba_map_mem(lba_map,
1630                                                              pg_id, alua_state);
1631                         if (ret) {
1632                                 pr_err("Invalid target descriptor %d:%c "
1633                                        "at line %d\n",
1634                                        pg_id, state, num);
1635                                 break;
1636                         }
1637                         pg++;
1638                         ptr = strchr(ptr, ' ');
1639                         if (ptr)
1640                                 ptr++;
1641                         else
1642                                 break;
1643                 }
1644                 if (pg_num == -1)
1645                     pg_num = pg;
1646                 else if (pg != pg_num) {
1647                         pr_err("Only %d from %d port groups definitions "
1648                                "at line %d\n", pg, pg_num, num);
1649                         ret = -EINVAL;
1650                         break;
1651                 }
1652                 num++;
1653         }
1654 out:
1655         if (ret) {
1656                 core_alua_free_lba_map(&lba_list);
1657                 count = ret;
1658         } else
1659                 core_alua_set_lba_map(dev, &lba_list,
1660                                       segment_size, segment_mult);
1661         kfree(map_entries);
1662         return count;
1663 }
1664
1665 static struct target_core_configfs_attribute target_core_attr_dev_lba_map = {
1666         .attr   = { .ca_owner = THIS_MODULE,
1667                     .ca_name = "lba_map",
1668                     .ca_mode = S_IRUGO | S_IWUSR },
1669         .show   = target_core_show_dev_lba_map,
1670         .store  = target_core_store_dev_lba_map,
1671 };
1672
1673 static struct configfs_attribute *target_core_dev_attrs[] = {
1674         &target_core_attr_dev_info.attr,
1675         &target_core_attr_dev_control.attr,
1676         &target_core_attr_dev_alias.attr,
1677         &target_core_attr_dev_udev_path.attr,
1678         &target_core_attr_dev_enable.attr,
1679         &target_core_attr_dev_alua_lu_gp.attr,
1680         &target_core_attr_dev_lba_map.attr,
1681         NULL,
1682 };
1683
1684 static void target_core_dev_release(struct config_item *item)
1685 {
1686         struct config_group *dev_cg = to_config_group(item);
1687         struct se_device *dev =
1688                 container_of(dev_cg, struct se_device, dev_group);
1689
1690         kfree(dev_cg->default_groups);
1691         target_free_device(dev);
1692 }
1693
1694 static ssize_t target_core_dev_show(struct config_item *item,
1695                                      struct configfs_attribute *attr,
1696                                      char *page)
1697 {
1698         struct config_group *dev_cg = to_config_group(item);
1699         struct se_device *dev =
1700                 container_of(dev_cg, struct se_device, dev_group);
1701         struct target_core_configfs_attribute *tc_attr = container_of(
1702                         attr, struct target_core_configfs_attribute, attr);
1703
1704         if (!tc_attr->show)
1705                 return -EINVAL;
1706
1707         return tc_attr->show(dev, page);
1708 }
1709
1710 static ssize_t target_core_dev_store(struct config_item *item,
1711                                       struct configfs_attribute *attr,
1712                                       const char *page, size_t count)
1713 {
1714         struct config_group *dev_cg = to_config_group(item);
1715         struct se_device *dev =
1716                 container_of(dev_cg, struct se_device, dev_group);
1717         struct target_core_configfs_attribute *tc_attr = container_of(
1718                         attr, struct target_core_configfs_attribute, attr);
1719
1720         if (!tc_attr->store)
1721                 return -EINVAL;
1722
1723         return tc_attr->store(dev, page, count);
1724 }
1725
1726 static struct configfs_item_operations target_core_dev_item_ops = {
1727         .release                = target_core_dev_release,
1728         .show_attribute         = target_core_dev_show,
1729         .store_attribute        = target_core_dev_store,
1730 };
1731
1732 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
1733
1734 /* End functions for struct config_item_type tb_dev_cit */
1735
1736 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
1737
1738 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
1739 #define SE_DEV_ALUA_LU_ATTR(_name, _mode)                               \
1740 static struct target_core_alua_lu_gp_attribute                          \
1741                         target_core_alua_lu_gp_##_name =                \
1742         __CONFIGFS_EATTR(_name, _mode,                                  \
1743         target_core_alua_lu_gp_show_attr_##_name,                       \
1744         target_core_alua_lu_gp_store_attr_##_name);
1745
1746 #define SE_DEV_ALUA_LU_ATTR_RO(_name)                                   \
1747 static struct target_core_alua_lu_gp_attribute                          \
1748                         target_core_alua_lu_gp_##_name =                \
1749         __CONFIGFS_EATTR_RO(_name,                                      \
1750         target_core_alua_lu_gp_show_attr_##_name);
1751
1752 /*
1753  * lu_gp_id
1754  */
1755 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
1756         struct t10_alua_lu_gp *lu_gp,
1757         char *page)
1758 {
1759         if (!lu_gp->lu_gp_valid_id)
1760                 return 0;
1761
1762         return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
1763 }
1764
1765 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
1766         struct t10_alua_lu_gp *lu_gp,
1767         const char *page,
1768         size_t count)
1769 {
1770         struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
1771         unsigned long lu_gp_id;
1772         int ret;
1773
1774         ret = kstrtoul(page, 0, &lu_gp_id);
1775         if (ret < 0) {
1776                 pr_err("kstrtoul() returned %d for"
1777                         " lu_gp_id\n", ret);
1778                 return ret;
1779         }
1780         if (lu_gp_id > 0x0000ffff) {
1781                 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
1782                         " 0x0000ffff\n", lu_gp_id);
1783                 return -EINVAL;
1784         }
1785
1786         ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
1787         if (ret < 0)
1788                 return -EINVAL;
1789
1790         pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
1791                 " Group: core/alua/lu_gps/%s to ID: %hu\n",
1792                 config_item_name(&alua_lu_gp_cg->cg_item),
1793                 lu_gp->lu_gp_id);
1794
1795         return count;
1796 }
1797
1798 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
1799
1800 /*
1801  * members
1802  */
1803 static ssize_t target_core_alua_lu_gp_show_attr_members(
1804         struct t10_alua_lu_gp *lu_gp,
1805         char *page)
1806 {
1807         struct se_device *dev;
1808         struct se_hba *hba;
1809         struct t10_alua_lu_gp_member *lu_gp_mem;
1810         ssize_t len = 0, cur_len;
1811         unsigned char buf[LU_GROUP_NAME_BUF];
1812
1813         memset(buf, 0, LU_GROUP_NAME_BUF);
1814
1815         spin_lock(&lu_gp->lu_gp_lock);
1816         list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
1817                 dev = lu_gp_mem->lu_gp_mem_dev;
1818                 hba = dev->se_hba;
1819
1820                 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
1821                         config_item_name(&hba->hba_group.cg_item),
1822                         config_item_name(&dev->dev_group.cg_item));
1823                 cur_len++; /* Extra byte for NULL terminator */
1824
1825                 if ((cur_len + len) > PAGE_SIZE) {
1826                         pr_warn("Ran out of lu_gp_show_attr"
1827                                 "_members buffer\n");
1828                         break;
1829                 }
1830                 memcpy(page+len, buf, cur_len);
1831                 len += cur_len;
1832         }
1833         spin_unlock(&lu_gp->lu_gp_lock);
1834
1835         return len;
1836 }
1837
1838 SE_DEV_ALUA_LU_ATTR_RO(members);
1839
1840 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
1841
1842 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
1843         &target_core_alua_lu_gp_lu_gp_id.attr,
1844         &target_core_alua_lu_gp_members.attr,
1845         NULL,
1846 };
1847
1848 static void target_core_alua_lu_gp_release(struct config_item *item)
1849 {
1850         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1851                         struct t10_alua_lu_gp, lu_gp_group);
1852
1853         core_alua_free_lu_gp(lu_gp);
1854 }
1855
1856 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
1857         .release                = target_core_alua_lu_gp_release,
1858         .show_attribute         = target_core_alua_lu_gp_attr_show,
1859         .store_attribute        = target_core_alua_lu_gp_attr_store,
1860 };
1861
1862 static struct config_item_type target_core_alua_lu_gp_cit = {
1863         .ct_item_ops            = &target_core_alua_lu_gp_ops,
1864         .ct_attrs               = target_core_alua_lu_gp_attrs,
1865         .ct_owner               = THIS_MODULE,
1866 };
1867
1868 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
1869
1870 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
1871
1872 static struct config_group *target_core_alua_create_lu_gp(
1873         struct config_group *group,
1874         const char *name)
1875 {
1876         struct t10_alua_lu_gp *lu_gp;
1877         struct config_group *alua_lu_gp_cg = NULL;
1878         struct config_item *alua_lu_gp_ci = NULL;
1879
1880         lu_gp = core_alua_allocate_lu_gp(name, 0);
1881         if (IS_ERR(lu_gp))
1882                 return NULL;
1883
1884         alua_lu_gp_cg = &lu_gp->lu_gp_group;
1885         alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
1886
1887         config_group_init_type_name(alua_lu_gp_cg, name,
1888                         &target_core_alua_lu_gp_cit);
1889
1890         pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
1891                 " Group: core/alua/lu_gps/%s\n",
1892                 config_item_name(alua_lu_gp_ci));
1893
1894         return alua_lu_gp_cg;
1895
1896 }
1897
1898 static void target_core_alua_drop_lu_gp(
1899         struct config_group *group,
1900         struct config_item *item)
1901 {
1902         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1903                         struct t10_alua_lu_gp, lu_gp_group);
1904
1905         pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
1906                 " Group: core/alua/lu_gps/%s, ID: %hu\n",
1907                 config_item_name(item), lu_gp->lu_gp_id);
1908         /*
1909          * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
1910          * -> target_core_alua_lu_gp_release()
1911          */
1912         config_item_put(item);
1913 }
1914
1915 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
1916         .make_group             = &target_core_alua_create_lu_gp,
1917         .drop_item              = &target_core_alua_drop_lu_gp,
1918 };
1919
1920 static struct config_item_type target_core_alua_lu_gps_cit = {
1921         .ct_item_ops            = NULL,
1922         .ct_group_ops           = &target_core_alua_lu_gps_group_ops,
1923         .ct_owner               = THIS_MODULE,
1924 };
1925
1926 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
1927
1928 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
1929
1930 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
1931 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode)                            \
1932 static struct target_core_alua_tg_pt_gp_attribute                       \
1933                         target_core_alua_tg_pt_gp_##_name =             \
1934         __CONFIGFS_EATTR(_name, _mode,                                  \
1935         target_core_alua_tg_pt_gp_show_attr_##_name,                    \
1936         target_core_alua_tg_pt_gp_store_attr_##_name);
1937
1938 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name)                                \
1939 static struct target_core_alua_tg_pt_gp_attribute                       \
1940                         target_core_alua_tg_pt_gp_##_name =             \
1941         __CONFIGFS_EATTR_RO(_name,                                      \
1942         target_core_alua_tg_pt_gp_show_attr_##_name);
1943
1944 /*
1945  * alua_access_state
1946  */
1947 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
1948         struct t10_alua_tg_pt_gp *tg_pt_gp,
1949         char *page)
1950 {
1951         return sprintf(page, "%d\n",
1952                 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
1953 }
1954
1955 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
1956         struct t10_alua_tg_pt_gp *tg_pt_gp,
1957         const char *page,
1958         size_t count)
1959 {
1960         struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
1961         unsigned long tmp;
1962         int new_state, ret;
1963
1964         if (!tg_pt_gp->tg_pt_gp_valid_id) {
1965                 pr_err("Unable to do implicit ALUA on non valid"
1966                         " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
1967                 return -EINVAL;
1968         }
1969         if (!(dev->dev_flags & DF_CONFIGURED)) {
1970                 pr_err("Unable to set alua_access_state while device is"
1971                        " not configured\n");
1972                 return -ENODEV;
1973         }
1974
1975         ret = kstrtoul(page, 0, &tmp);
1976         if (ret < 0) {
1977                 pr_err("Unable to extract new ALUA access state from"
1978                                 " %s\n", page);
1979                 return ret;
1980         }
1981         new_state = (int)tmp;
1982
1983         if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
1984                 pr_err("Unable to process implicit configfs ALUA"
1985                         " transition while TPGS_IMPLICIT_ALUA is disabled\n");
1986                 return -EINVAL;
1987         }
1988         if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
1989             new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
1990                 /* LBA DEPENDENT is only allowed with implicit ALUA */
1991                 pr_err("Unable to process implicit configfs ALUA transition"
1992                        " while explicit ALUA management is enabled\n");
1993                 return -EINVAL;
1994         }
1995
1996         ret = core_alua_do_port_transition(tg_pt_gp, dev,
1997                                         NULL, NULL, new_state, 0);
1998         return (!ret) ? count : -EINVAL;
1999 }
2000
2001 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2002
2003 /*
2004  * alua_access_status
2005  */
2006 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2007         struct t10_alua_tg_pt_gp *tg_pt_gp,
2008         char *page)
2009 {
2010         return sprintf(page, "%s\n",
2011                 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2012 }
2013
2014 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2015         struct t10_alua_tg_pt_gp *tg_pt_gp,
2016         const char *page,
2017         size_t count)
2018 {
2019         unsigned long tmp;
2020         int new_status, ret;
2021
2022         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2023                 pr_err("Unable to do set ALUA access status on non"
2024                         " valid tg_pt_gp ID: %hu\n",
2025                         tg_pt_gp->tg_pt_gp_valid_id);
2026                 return -EINVAL;
2027         }
2028
2029         ret = kstrtoul(page, 0, &tmp);
2030         if (ret < 0) {
2031                 pr_err("Unable to extract new ALUA access status"
2032                                 " from %s\n", page);
2033                 return ret;
2034         }
2035         new_status = (int)tmp;
2036
2037         if ((new_status != ALUA_STATUS_NONE) &&
2038             (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2039             (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2040                 pr_err("Illegal ALUA access status: 0x%02x\n",
2041                                 new_status);
2042                 return -EINVAL;
2043         }
2044
2045         tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2046         return count;
2047 }
2048
2049 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2050
2051 /*
2052  * alua_access_type
2053  */
2054 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2055         struct t10_alua_tg_pt_gp *tg_pt_gp,
2056         char *page)
2057 {
2058         return core_alua_show_access_type(tg_pt_gp, page);
2059 }
2060
2061 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2062         struct t10_alua_tg_pt_gp *tg_pt_gp,
2063         const char *page,
2064         size_t count)
2065 {
2066         return core_alua_store_access_type(tg_pt_gp, page, count);
2067 }
2068
2069 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2070
2071 /*
2072  * alua_supported_states
2073  */
2074
2075 #define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit)               \
2076 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \
2077         struct t10_alua_tg_pt_gp *t, char *p)                           \
2078 {                                                                       \
2079         return sprintf(p, "%d\n", !!(t->_var & _bit));                  \
2080 }
2081
2082 #define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit)              \
2083 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\
2084         struct t10_alua_tg_pt_gp *t, const char *p, size_t c)           \
2085 {                                                                       \
2086         unsigned long tmp;                                              \
2087         int ret;                                                        \
2088                                                                         \
2089         if (!t->tg_pt_gp_valid_id) {                                    \
2090                 pr_err("Unable to do set ##_name ALUA state on non"     \
2091                        " valid tg_pt_gp ID: %hu\n",                     \
2092                        t->tg_pt_gp_valid_id);                           \
2093                 return -EINVAL;                                         \
2094         }                                                               \
2095                                                                         \
2096         ret = kstrtoul(p, 0, &tmp);                                     \
2097         if (ret < 0) {                                                  \
2098                 pr_err("Invalid value '%s', must be '0' or '1'\n", p);  \
2099                 return -EINVAL;                                         \
2100         }                                                               \
2101         if (tmp > 1) {                                                  \
2102                 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2103                 return -EINVAL;                                         \
2104         }                                                               \
2105         if (tmp)                                                        \
2106                 t->_var |= _bit;                                        \
2107         else                                                            \
2108                 t->_var &= ~_bit;                                       \
2109                                                                         \
2110         return c;                                                       \
2111 }
2112
2113 SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning,
2114                                tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2115 SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning,
2116                                 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2117 SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR);
2118
2119 SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline,
2120                                tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2121 SE_DEV_ALUA_SUPPORT_STATE_STORE(offline,
2122                                 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2123 SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR);
2124
2125 SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent,
2126                                tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2127 SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent,
2128                                 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2129 SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO);
2130
2131 SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable,
2132                                tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2133 SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable,
2134                                 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2135 SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR);
2136
2137 SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby,
2138                                tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2139 SE_DEV_ALUA_SUPPORT_STATE_STORE(standby,
2140                                 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2141 SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR);
2142
2143 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized,
2144                                tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2145 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized,
2146                                 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2147 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR);
2148
2149 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized,
2150                                tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2151 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized,
2152                                 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2153 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR);
2154
2155 /*
2156  * alua_write_metadata
2157  */
2158 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2159         struct t10_alua_tg_pt_gp *tg_pt_gp,
2160         char *page)
2161 {
2162         return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2163 }
2164
2165 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2166         struct t10_alua_tg_pt_gp *tg_pt_gp,
2167         const char *page,
2168         size_t count)
2169 {
2170         unsigned long tmp;
2171         int ret;
2172
2173         ret = kstrtoul(page, 0, &tmp);
2174         if (ret < 0) {
2175                 pr_err("Unable to extract alua_write_metadata\n");
2176                 return ret;
2177         }
2178
2179         if ((tmp != 0) && (tmp != 1)) {
2180                 pr_err("Illegal value for alua_write_metadata:"
2181                         " %lu\n", tmp);
2182                 return -EINVAL;
2183         }
2184         tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2185
2186         return count;
2187 }
2188
2189 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2190
2191
2192
2193 /*
2194  * nonop_delay_msecs
2195  */
2196 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2197         struct t10_alua_tg_pt_gp *tg_pt_gp,
2198         char *page)
2199 {
2200         return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2201
2202 }
2203
2204 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2205         struct t10_alua_tg_pt_gp *tg_pt_gp,
2206         const char *page,
2207         size_t count)
2208 {
2209         return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2210 }
2211
2212 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2213
2214 /*
2215  * trans_delay_msecs
2216  */
2217 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2218         struct t10_alua_tg_pt_gp *tg_pt_gp,
2219         char *page)
2220 {
2221         return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2222 }
2223
2224 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2225         struct t10_alua_tg_pt_gp *tg_pt_gp,
2226         const char *page,
2227         size_t count)
2228 {
2229         return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2230 }
2231
2232 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2233
2234 /*
2235  * implicit_trans_secs
2236  */
2237 static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs(
2238         struct t10_alua_tg_pt_gp *tg_pt_gp,
2239         char *page)
2240 {
2241         return core_alua_show_implicit_trans_secs(tg_pt_gp, page);
2242 }
2243
2244 static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs(
2245         struct t10_alua_tg_pt_gp *tg_pt_gp,
2246         const char *page,
2247         size_t count)
2248 {
2249         return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count);
2250 }
2251
2252 SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR);
2253
2254 /*
2255  * preferred
2256  */
2257
2258 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2259         struct t10_alua_tg_pt_gp *tg_pt_gp,
2260         char *page)
2261 {
2262         return core_alua_show_preferred_bit(tg_pt_gp, page);
2263 }
2264
2265 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2266         struct t10_alua_tg_pt_gp *tg_pt_gp,
2267         const char *page,
2268         size_t count)
2269 {
2270         return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2271 }
2272
2273 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2274
2275 /*
2276  * tg_pt_gp_id
2277  */
2278 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2279         struct t10_alua_tg_pt_gp *tg_pt_gp,
2280         char *page)
2281 {
2282         if (!tg_pt_gp->tg_pt_gp_valid_id)
2283                 return 0;
2284
2285         return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2286 }
2287
2288 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2289         struct t10_alua_tg_pt_gp *tg_pt_gp,
2290         const char *page,
2291         size_t count)
2292 {
2293         struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2294         unsigned long tg_pt_gp_id;
2295         int ret;
2296
2297         ret = kstrtoul(page, 0, &tg_pt_gp_id);
2298         if (ret < 0) {
2299                 pr_err("kstrtoul() returned %d for"
2300                         " tg_pt_gp_id\n", ret);
2301                 return ret;
2302         }
2303         if (tg_pt_gp_id > 0x0000ffff) {
2304                 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2305                         " 0x0000ffff\n", tg_pt_gp_id);
2306                 return -EINVAL;
2307         }
2308
2309         ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2310         if (ret < 0)
2311                 return -EINVAL;
2312
2313         pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2314                 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2315                 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2316                 tg_pt_gp->tg_pt_gp_id);
2317
2318         return count;
2319 }
2320
2321 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2322
2323 /*
2324  * members
2325  */
2326 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2327         struct t10_alua_tg_pt_gp *tg_pt_gp,
2328         char *page)
2329 {
2330         struct se_port *port;
2331         struct se_portal_group *tpg;
2332         struct se_lun *lun;
2333         struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2334         ssize_t len = 0, cur_len;
2335         unsigned char buf[TG_PT_GROUP_NAME_BUF];
2336
2337         memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2338
2339         spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2340         list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2341                         tg_pt_gp_mem_list) {
2342                 port = tg_pt_gp_mem->tg_pt;
2343                 tpg = port->sep_tpg;
2344                 lun = port->sep_lun;
2345
2346                 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2347                         "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2348                         tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2349                         tpg->se_tpg_tfo->tpg_get_tag(tpg),
2350                         config_item_name(&lun->lun_group.cg_item));
2351                 cur_len++; /* Extra byte for NULL terminator */
2352
2353                 if ((cur_len + len) > PAGE_SIZE) {
2354                         pr_warn("Ran out of lu_gp_show_attr"
2355                                 "_members buffer\n");
2356                         break;
2357                 }
2358                 memcpy(page+len, buf, cur_len);
2359                 len += cur_len;
2360         }
2361         spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2362
2363         return len;
2364 }
2365
2366 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2367
2368 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2369                         tg_pt_gp_group);
2370
2371 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2372         &target_core_alua_tg_pt_gp_alua_access_state.attr,
2373         &target_core_alua_tg_pt_gp_alua_access_status.attr,
2374         &target_core_alua_tg_pt_gp_alua_access_type.attr,
2375         &target_core_alua_tg_pt_gp_alua_support_transitioning.attr,
2376         &target_core_alua_tg_pt_gp_alua_support_offline.attr,
2377         &target_core_alua_tg_pt_gp_alua_support_lba_dependent.attr,
2378         &target_core_alua_tg_pt_gp_alua_support_unavailable.attr,
2379         &target_core_alua_tg_pt_gp_alua_support_standby.attr,
2380         &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized.attr,
2381         &target_core_alua_tg_pt_gp_alua_support_active_optimized.attr,
2382         &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2383         &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2384         &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2385         &target_core_alua_tg_pt_gp_implicit_trans_secs.attr,
2386         &target_core_alua_tg_pt_gp_preferred.attr,
2387         &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2388         &target_core_alua_tg_pt_gp_members.attr,
2389         NULL,
2390 };
2391
2392 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2393 {
2394         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2395                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2396
2397         core_alua_free_tg_pt_gp(tg_pt_gp);
2398 }
2399
2400 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2401         .release                = target_core_alua_tg_pt_gp_release,
2402         .show_attribute         = target_core_alua_tg_pt_gp_attr_show,
2403         .store_attribute        = target_core_alua_tg_pt_gp_attr_store,
2404 };
2405
2406 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2407         .ct_item_ops            = &target_core_alua_tg_pt_gp_ops,
2408         .ct_attrs               = target_core_alua_tg_pt_gp_attrs,
2409         .ct_owner               = THIS_MODULE,
2410 };
2411
2412 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2413
2414 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2415
2416 static struct config_group *target_core_alua_create_tg_pt_gp(
2417         struct config_group *group,
2418         const char *name)
2419 {
2420         struct t10_alua *alua = container_of(group, struct t10_alua,
2421                                         alua_tg_pt_gps_group);
2422         struct t10_alua_tg_pt_gp *tg_pt_gp;
2423         struct config_group *alua_tg_pt_gp_cg = NULL;
2424         struct config_item *alua_tg_pt_gp_ci = NULL;
2425
2426         tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2427         if (!tg_pt_gp)
2428                 return NULL;
2429
2430         alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2431         alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2432
2433         config_group_init_type_name(alua_tg_pt_gp_cg, name,
2434                         &target_core_alua_tg_pt_gp_cit);
2435
2436         pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2437                 " Group: alua/tg_pt_gps/%s\n",
2438                 config_item_name(alua_tg_pt_gp_ci));
2439
2440         return alua_tg_pt_gp_cg;
2441 }
2442
2443 static void target_core_alua_drop_tg_pt_gp(
2444         struct config_group *group,
2445         struct config_item *item)
2446 {
2447         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2448                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2449
2450         pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2451                 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2452                 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2453         /*
2454          * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2455          * -> target_core_alua_tg_pt_gp_release().
2456          */
2457         config_item_put(item);
2458 }
2459
2460 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2461         .make_group             = &target_core_alua_create_tg_pt_gp,
2462         .drop_item              = &target_core_alua_drop_tg_pt_gp,
2463 };
2464
2465 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
2466
2467 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2468
2469 /* Start functions for struct config_item_type target_core_alua_cit */
2470
2471 /*
2472  * target_core_alua_cit is a ConfigFS group that lives under
2473  * /sys/kernel/config/target/core/alua.  There are default groups
2474  * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2475  * target_core_alua_cit in target_core_init_configfs() below.
2476  */
2477 static struct config_item_type target_core_alua_cit = {
2478         .ct_item_ops            = NULL,
2479         .ct_attrs               = NULL,
2480         .ct_owner               = THIS_MODULE,
2481 };
2482
2483 /* End functions for struct config_item_type target_core_alua_cit */
2484
2485 /* Start functions for struct config_item_type tb_dev_stat_cit */
2486
2487 static struct config_group *target_core_stat_mkdir(
2488         struct config_group *group,
2489         const char *name)
2490 {
2491         return ERR_PTR(-ENOSYS);
2492 }
2493
2494 static void target_core_stat_rmdir(
2495         struct config_group *group,
2496         struct config_item *item)
2497 {
2498         return;
2499 }
2500
2501 static struct configfs_group_operations target_core_stat_group_ops = {
2502         .make_group             = &target_core_stat_mkdir,
2503         .drop_item              = &target_core_stat_rmdir,
2504 };
2505
2506 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
2507
2508 /* End functions for struct config_item_type tb_dev_stat_cit */
2509
2510 /* Start functions for struct config_item_type target_core_hba_cit */
2511
2512 static struct config_group *target_core_make_subdev(
2513         struct config_group *group,
2514         const char *name)
2515 {
2516         struct t10_alua_tg_pt_gp *tg_pt_gp;
2517         struct se_subsystem_api *t;
2518         struct config_item *hba_ci = &group->cg_item;
2519         struct se_hba *hba = item_to_hba(hba_ci);
2520         struct se_device *dev;
2521         struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2522         struct config_group *dev_stat_grp = NULL;
2523         int errno = -ENOMEM, ret;
2524
2525         ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2526         if (ret)
2527                 return ERR_PTR(ret);
2528         /*
2529          * Locate the struct se_subsystem_api from parent's struct se_hba.
2530          */
2531         t = hba->transport;
2532
2533         dev = target_alloc_device(hba, name);
2534         if (!dev)
2535                 goto out_unlock;
2536
2537         dev_cg = &dev->dev_group;
2538
2539         dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
2540                         GFP_KERNEL);
2541         if (!dev_cg->default_groups)
2542                 goto out_free_device;
2543
2544         config_group_init_type_name(dev_cg, name, &t->tb_cits.tb_dev_cit);
2545         config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2546                         &t->tb_cits.tb_dev_attrib_cit);
2547         config_group_init_type_name(&dev->dev_pr_group, "pr",
2548                         &t->tb_cits.tb_dev_pr_cit);
2549         config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2550                         &t->tb_cits.tb_dev_wwn_cit);
2551         config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2552                         "alua", &t->tb_cits.tb_dev_alua_tg_pt_gps_cit);
2553         config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2554                         "statistics", &t->tb_cits.tb_dev_stat_cit);
2555
2556         dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
2557         dev_cg->default_groups[1] = &dev->dev_pr_group;
2558         dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
2559         dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
2560         dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
2561         dev_cg->default_groups[5] = NULL;
2562         /*
2563          * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2564          */
2565         tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2566         if (!tg_pt_gp)
2567                 goto out_free_dev_cg_default_groups;
2568         dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2569
2570         tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2571         tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2572                                 GFP_KERNEL);
2573         if (!tg_pt_gp_cg->default_groups) {
2574                 pr_err("Unable to allocate tg_pt_gp_cg->"
2575                                 "default_groups\n");
2576                 goto out_free_tg_pt_gp;
2577         }
2578
2579         config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2580                         "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2581         tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2582         tg_pt_gp_cg->default_groups[1] = NULL;
2583         /*
2584          * Add core/$HBA/$DEV/statistics/ default groups
2585          */
2586         dev_stat_grp = &dev->dev_stat_grps.stat_group;
2587         dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
2588                                 GFP_KERNEL);
2589         if (!dev_stat_grp->default_groups) {
2590                 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2591                 goto out_free_tg_pt_gp_cg_default_groups;
2592         }
2593         target_stat_setup_dev_default_groups(dev);
2594
2595         mutex_unlock(&hba->hba_access_mutex);
2596         return dev_cg;
2597
2598 out_free_tg_pt_gp_cg_default_groups:
2599         kfree(tg_pt_gp_cg->default_groups);
2600 out_free_tg_pt_gp:
2601         core_alua_free_tg_pt_gp(tg_pt_gp);
2602 out_free_dev_cg_default_groups:
2603         kfree(dev_cg->default_groups);
2604 out_free_device:
2605         target_free_device(dev);
2606 out_unlock:
2607         mutex_unlock(&hba->hba_access_mutex);
2608         return ERR_PTR(errno);
2609 }
2610
2611 static void target_core_drop_subdev(
2612         struct config_group *group,
2613         struct config_item *item)
2614 {
2615         struct config_group *dev_cg = to_config_group(item);
2616         struct se_device *dev =
2617                 container_of(dev_cg, struct se_device, dev_group);
2618         struct se_hba *hba;
2619         struct config_item *df_item;
2620         struct config_group *tg_pt_gp_cg, *dev_stat_grp;
2621         int i;
2622
2623         hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
2624
2625         mutex_lock(&hba->hba_access_mutex);
2626
2627         dev_stat_grp = &dev->dev_stat_grps.stat_group;
2628         for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2629                 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2630                 dev_stat_grp->default_groups[i] = NULL;
2631                 config_item_put(df_item);
2632         }
2633         kfree(dev_stat_grp->default_groups);
2634
2635         tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2636         for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2637                 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2638                 tg_pt_gp_cg->default_groups[i] = NULL;
2639                 config_item_put(df_item);
2640         }
2641         kfree(tg_pt_gp_cg->default_groups);
2642         /*
2643          * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2644          * directly from target_core_alua_tg_pt_gp_release().
2645          */
2646         dev->t10_alua.default_tg_pt_gp = NULL;
2647
2648         for (i = 0; dev_cg->default_groups[i]; i++) {
2649                 df_item = &dev_cg->default_groups[i]->cg_item;
2650                 dev_cg->default_groups[i] = NULL;
2651                 config_item_put(df_item);
2652         }
2653         /*
2654          * se_dev is released from target_core_dev_item_ops->release()
2655          */
2656         config_item_put(item);
2657         mutex_unlock(&hba->hba_access_mutex);
2658 }
2659
2660 static struct configfs_group_operations target_core_hba_group_ops = {
2661         .make_group             = target_core_make_subdev,
2662         .drop_item              = target_core_drop_subdev,
2663 };
2664
2665 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2666 #define SE_HBA_ATTR(_name, _mode)                               \
2667 static struct target_core_hba_attribute                         \
2668                 target_core_hba_##_name =                       \
2669                 __CONFIGFS_EATTR(_name, _mode,                  \
2670                 target_core_hba_show_attr_##_name,              \
2671                 target_core_hba_store_attr_##_name);
2672
2673 #define SE_HBA_ATTR_RO(_name)                                   \
2674 static struct target_core_hba_attribute                         \
2675                 target_core_hba_##_name =                       \
2676                 __CONFIGFS_EATTR_RO(_name,                      \
2677                 target_core_hba_show_attr_##_name);
2678
2679 static ssize_t target_core_hba_show_attr_hba_info(
2680         struct se_hba *hba,
2681         char *page)
2682 {
2683         return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2684                         hba->hba_id, hba->transport->name,
2685                         TARGET_CORE_CONFIGFS_VERSION);
2686 }
2687
2688 SE_HBA_ATTR_RO(hba_info);
2689
2690 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2691                                 char *page)
2692 {
2693         int hba_mode = 0;
2694
2695         if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2696                 hba_mode = 1;
2697
2698         return sprintf(page, "%d\n", hba_mode);
2699 }
2700
2701 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2702                                 const char *page, size_t count)
2703 {
2704         struct se_subsystem_api *transport = hba->transport;
2705         unsigned long mode_flag;
2706         int ret;
2707
2708         if (transport->pmode_enable_hba == NULL)
2709                 return -EINVAL;
2710
2711         ret = kstrtoul(page, 0, &mode_flag);
2712         if (ret < 0) {
2713                 pr_err("Unable to extract hba mode flag: %d\n", ret);
2714                 return ret;
2715         }
2716
2717         if (hba->dev_count) {
2718                 pr_err("Unable to set hba_mode with active devices\n");
2719                 return -EINVAL;
2720         }
2721
2722         ret = transport->pmode_enable_hba(hba, mode_flag);
2723         if (ret < 0)
2724                 return -EINVAL;
2725         if (ret > 0)
2726                 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2727         else if (ret == 0)
2728                 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2729
2730         return count;
2731 }
2732
2733 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2734
2735 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2736
2737 static void target_core_hba_release(struct config_item *item)
2738 {
2739         struct se_hba *hba = container_of(to_config_group(item),
2740                                 struct se_hba, hba_group);
2741         core_delete_hba(hba);
2742 }
2743
2744 static struct configfs_attribute *target_core_hba_attrs[] = {
2745         &target_core_hba_hba_info.attr,
2746         &target_core_hba_hba_mode.attr,
2747         NULL,
2748 };
2749
2750 static struct configfs_item_operations target_core_hba_item_ops = {
2751         .release                = target_core_hba_release,
2752         .show_attribute         = target_core_hba_attr_show,
2753         .store_attribute        = target_core_hba_attr_store,
2754 };
2755
2756 static struct config_item_type target_core_hba_cit = {
2757         .ct_item_ops            = &target_core_hba_item_ops,
2758         .ct_group_ops           = &target_core_hba_group_ops,
2759         .ct_attrs               = target_core_hba_attrs,
2760         .ct_owner               = THIS_MODULE,
2761 };
2762
2763 static struct config_group *target_core_call_addhbatotarget(
2764         struct config_group *group,
2765         const char *name)
2766 {
2767         char *se_plugin_str, *str, *str2;
2768         struct se_hba *hba;
2769         char buf[TARGET_CORE_NAME_MAX_LEN];
2770         unsigned long plugin_dep_id = 0;
2771         int ret;
2772
2773         memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
2774         if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
2775                 pr_err("Passed *name strlen(): %d exceeds"
2776                         " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
2777                         TARGET_CORE_NAME_MAX_LEN);
2778                 return ERR_PTR(-ENAMETOOLONG);
2779         }
2780         snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
2781
2782         str = strstr(buf, "_");
2783         if (!str) {
2784                 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
2785                 return ERR_PTR(-EINVAL);
2786         }
2787         se_plugin_str = buf;
2788         /*
2789          * Special case for subsystem plugins that have "_" in their names.
2790          * Namely rd_direct and rd_mcp..
2791          */
2792         str2 = strstr(str+1, "_");
2793         if (str2) {
2794                 *str2 = '\0'; /* Terminate for *se_plugin_str */
2795                 str2++; /* Skip to start of plugin dependent ID */
2796                 str = str2;
2797         } else {
2798                 *str = '\0'; /* Terminate for *se_plugin_str */
2799                 str++; /* Skip to start of plugin dependent ID */
2800         }
2801
2802         ret = kstrtoul(str, 0, &plugin_dep_id);
2803         if (ret < 0) {
2804                 pr_err("kstrtoul() returned %d for"
2805                                 " plugin_dep_id\n", ret);
2806                 return ERR_PTR(ret);
2807         }
2808         /*
2809          * Load up TCM subsystem plugins if they have not already been loaded.
2810          */
2811         transport_subsystem_check_init();
2812
2813         hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
2814         if (IS_ERR(hba))
2815                 return ERR_CAST(hba);
2816
2817         config_group_init_type_name(&hba->hba_group, name,
2818                         &target_core_hba_cit);
2819
2820         return &hba->hba_group;
2821 }
2822
2823 static void target_core_call_delhbafromtarget(
2824         struct config_group *group,
2825         struct config_item *item)
2826 {
2827         /*
2828          * core_delete_hba() is called from target_core_hba_item_ops->release()
2829          * -> target_core_hba_release()
2830          */
2831         config_item_put(item);
2832 }
2833
2834 static struct configfs_group_operations target_core_group_ops = {
2835         .make_group     = target_core_call_addhbatotarget,
2836         .drop_item      = target_core_call_delhbafromtarget,
2837 };
2838
2839 static struct config_item_type target_core_cit = {
2840         .ct_item_ops    = NULL,
2841         .ct_group_ops   = &target_core_group_ops,
2842         .ct_attrs       = NULL,
2843         .ct_owner       = THIS_MODULE,
2844 };
2845
2846 /* Stop functions for struct config_item_type target_core_hba_cit */
2847
2848 void target_core_setup_sub_cits(struct se_subsystem_api *sa)
2849 {
2850         target_core_setup_dev_cit(sa);
2851         target_core_setup_dev_attrib_cit(sa);
2852         target_core_setup_dev_pr_cit(sa);
2853         target_core_setup_dev_wwn_cit(sa);
2854         target_core_setup_dev_alua_tg_pt_gps_cit(sa);
2855         target_core_setup_dev_stat_cit(sa);
2856 }
2857 EXPORT_SYMBOL(target_core_setup_sub_cits);
2858
2859 static int __init target_core_init_configfs(void)
2860 {
2861         struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
2862         struct config_group *lu_gp_cg = NULL;
2863         struct configfs_subsystem *subsys = &target_core_fabrics;
2864         struct t10_alua_lu_gp *lu_gp;
2865         int ret;
2866
2867         pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
2868                 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
2869                 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
2870
2871         config_group_init(&subsys->su_group);
2872         mutex_init(&subsys->su_mutex);
2873
2874         ret = init_se_kmem_caches();
2875         if (ret < 0)
2876                 return ret;
2877         /*
2878          * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
2879          * and ALUA Logical Unit Group and Target Port Group infrastructure.
2880          */
2881         target_cg = &subsys->su_group;
2882         target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2883                                 GFP_KERNEL);
2884         if (!target_cg->default_groups) {
2885                 pr_err("Unable to allocate target_cg->default_groups\n");
2886                 ret = -ENOMEM;
2887                 goto out_global;
2888         }
2889
2890         config_group_init_type_name(&target_core_hbagroup,
2891                         "core", &target_core_cit);
2892         target_cg->default_groups[0] = &target_core_hbagroup;
2893         target_cg->default_groups[1] = NULL;
2894         /*
2895          * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
2896          */
2897         hba_cg = &target_core_hbagroup;
2898         hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2899                                 GFP_KERNEL);
2900         if (!hba_cg->default_groups) {
2901                 pr_err("Unable to allocate hba_cg->default_groups\n");
2902                 ret = -ENOMEM;
2903                 goto out_global;
2904         }
2905         config_group_init_type_name(&alua_group,
2906                         "alua", &target_core_alua_cit);
2907         hba_cg->default_groups[0] = &alua_group;
2908         hba_cg->default_groups[1] = NULL;
2909         /*
2910          * Add ALUA Logical Unit Group and Target Port Group ConfigFS
2911          * groups under /sys/kernel/config/target/core/alua/
2912          */
2913         alua_cg = &alua_group;
2914         alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2915                         GFP_KERNEL);
2916         if (!alua_cg->default_groups) {
2917                 pr_err("Unable to allocate alua_cg->default_groups\n");
2918                 ret = -ENOMEM;
2919                 goto out_global;
2920         }
2921
2922         config_group_init_type_name(&alua_lu_gps_group,
2923                         "lu_gps", &target_core_alua_lu_gps_cit);
2924         alua_cg->default_groups[0] = &alua_lu_gps_group;
2925         alua_cg->default_groups[1] = NULL;
2926         /*
2927          * Add core/alua/lu_gps/default_lu_gp
2928          */
2929         lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
2930         if (IS_ERR(lu_gp)) {
2931                 ret = -ENOMEM;
2932                 goto out_global;
2933         }
2934
2935         lu_gp_cg = &alua_lu_gps_group;
2936         lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2937                         GFP_KERNEL);
2938         if (!lu_gp_cg->default_groups) {
2939                 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
2940                 ret = -ENOMEM;
2941                 goto out_global;
2942         }
2943
2944         config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
2945                                 &target_core_alua_lu_gp_cit);
2946         lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
2947         lu_gp_cg->default_groups[1] = NULL;
2948         default_lu_gp = lu_gp;
2949         /*
2950          * Register the target_core_mod subsystem with configfs.
2951          */
2952         ret = configfs_register_subsystem(subsys);
2953         if (ret < 0) {
2954                 pr_err("Error %d while registering subsystem %s\n",
2955                         ret, subsys->su_group.cg_item.ci_namebuf);
2956                 goto out_global;
2957         }
2958         pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
2959                 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
2960                 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
2961         /*
2962          * Register built-in RAMDISK subsystem logic for virtual LUN 0
2963          */
2964         ret = rd_module_init();
2965         if (ret < 0)
2966                 goto out;
2967
2968         ret = core_dev_setup_virtual_lun0();
2969         if (ret < 0)
2970                 goto out;
2971
2972         ret = target_xcopy_setup_pt();
2973         if (ret < 0)
2974                 goto out;
2975
2976         return 0;
2977
2978 out:
2979         configfs_unregister_subsystem(subsys);
2980         core_dev_release_virtual_lun0();
2981         rd_module_exit();
2982 out_global:
2983         if (default_lu_gp) {
2984                 core_alua_free_lu_gp(default_lu_gp);
2985                 default_lu_gp = NULL;
2986         }
2987         if (lu_gp_cg)
2988                 kfree(lu_gp_cg->default_groups);
2989         if (alua_cg)
2990                 kfree(alua_cg->default_groups);
2991         if (hba_cg)
2992                 kfree(hba_cg->default_groups);
2993         kfree(target_cg->default_groups);
2994         release_se_kmem_caches();
2995         return ret;
2996 }
2997
2998 static void __exit target_core_exit_configfs(void)
2999 {
3000         struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3001         struct config_item *item;
3002         int i;
3003
3004         lu_gp_cg = &alua_lu_gps_group;
3005         for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3006                 item = &lu_gp_cg->default_groups[i]->cg_item;
3007                 lu_gp_cg->default_groups[i] = NULL;
3008                 config_item_put(item);
3009         }
3010         kfree(lu_gp_cg->default_groups);
3011         lu_gp_cg->default_groups = NULL;
3012
3013         alua_cg = &alua_group;
3014         for (i = 0; alua_cg->default_groups[i]; i++) {
3015                 item = &alua_cg->default_groups[i]->cg_item;
3016                 alua_cg->default_groups[i] = NULL;
3017                 config_item_put(item);
3018         }
3019         kfree(alua_cg->default_groups);
3020         alua_cg->default_groups = NULL;
3021
3022         hba_cg = &target_core_hbagroup;
3023         for (i = 0; hba_cg->default_groups[i]; i++) {
3024                 item = &hba_cg->default_groups[i]->cg_item;
3025                 hba_cg->default_groups[i] = NULL;
3026                 config_item_put(item);
3027         }
3028         kfree(hba_cg->default_groups);
3029         hba_cg->default_groups = NULL;
3030         /*
3031          * We expect subsys->su_group.default_groups to be released
3032          * by configfs subsystem provider logic..
3033          */
3034         configfs_unregister_subsystem(&target_core_fabrics);
3035         kfree(target_core_fabrics.su_group.default_groups);
3036
3037         core_alua_free_lu_gp(default_lu_gp);
3038         default_lu_gp = NULL;
3039
3040         pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3041                         " Infrastructure\n");
3042
3043         core_dev_release_virtual_lun0();
3044         rd_module_exit();
3045         target_xcopy_release_pt();
3046         release_se_kmem_caches();
3047 }
3048
3049 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3050 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3051 MODULE_LICENSE("GPL");
3052
3053 module_init(target_core_init_configfs);
3054 module_exit(target_core_exit_configfs);