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_default_depth) {
 334                 pr_err("Missing tfo->tpg_get_default_depth()\n");
 335                 return -EINVAL;
 336         }
 337         if (!tfo->tpg_get_pr_transport_id) {
 338                 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
 339                 return -EINVAL;
 340         }
 341         if (!tfo->tpg_get_pr_transport_id_len) {
 342                 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
 343                 return -EINVAL;
 344         }
 345         if (!tfo->tpg_check_demo_mode) {
 346                 pr_err("Missing tfo->tpg_check_demo_mode()\n");
 347                 return -EINVAL;
 348         }
 349         if (!tfo->tpg_check_demo_mode_cache) {
 350                 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
 351                 return -EINVAL;
 352         }
 353         if (!tfo->tpg_check_demo_mode_write_protect) {
 354                 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
 355                 return -EINVAL;
 356         }
 357         if (!tfo->tpg_check_prod_mode_write_protect) {
 358                 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
 359                 return -EINVAL;
 360         }
 361         if (!tfo->tpg_alloc_fabric_acl) {
 362                 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
 363                 return -EINVAL;
 364         }
 365         if (!tfo->tpg_release_fabric_acl) {
 366                 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
 367                 return -EINVAL;
 368         }
 369         if (!tfo->tpg_get_inst_index) {
 370                 pr_err("Missing tfo->tpg_get_inst_index()\n");
 371                 return -EINVAL;
 372         }
 373         if (!tfo->release_cmd) {
 374                 pr_err("Missing tfo->release_cmd()\n");
 375                 return -EINVAL;
 376         }
 377         if (!tfo->shutdown_session) {
 378                 pr_err("Missing tfo->shutdown_session()\n");
 379                 return -EINVAL;
 380         }
 381         if (!tfo->close_session) {
 382                 pr_err("Missing tfo->close_session()\n");
 383                 return -EINVAL;
 384         }
 385         if (!tfo->sess_get_index) {
 386                 pr_err("Missing tfo->sess_get_index()\n");
 387                 return -EINVAL;
 388         }
 389         if (!tfo->write_pending) {
 390                 pr_err("Missing tfo->write_pending()\n");
 391                 return -EINVAL;
 392         }
 393         if (!tfo->write_pending_status) {
 394                 pr_err("Missing tfo->write_pending_status()\n");
 395                 return -EINVAL;
 396         }
 397         if (!tfo->set_default_node_attributes) {
 398                 pr_err("Missing tfo->set_default_node_attributes()\n");
 399                 return -EINVAL;
 400         }
 401         if (!tfo->get_task_tag) {
 402                 pr_err("Missing tfo->get_task_tag()\n");
 403                 return -EINVAL;
 404         }
 405         if (!tfo->get_cmd_state) {
 406                 pr_err("Missing tfo->get_cmd_state()\n");
 407                 return -EINVAL;
 408         }
 409         if (!tfo->queue_data_in) {
 410                 pr_err("Missing tfo->queue_data_in()\n");
 411                 return -EINVAL;
 412         }
 413         if (!tfo->queue_status) {
 414                 pr_err("Missing tfo->queue_status()\n");
 415                 return -EINVAL;
 416         }
 417         if (!tfo->queue_tm_rsp) {
 418                 pr_err("Missing tfo->queue_tm_rsp()\n");
 419                 return -EINVAL;
 420         }
 421         if (!tfo->aborted_task) {
 422                 pr_err("Missing tfo->aborted_task()\n");
 423                 return -EINVAL;
 424         }
 425         /*
 426          * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
 427          * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
 428          * target_core_fabric_configfs.c WWN+TPG group context code.
 429          */
 430         if (!tfo->fabric_make_wwn) {
 431                 pr_err("Missing tfo->fabric_make_wwn()\n");
 432                 return -EINVAL;
 433         }
 434         if (!tfo->fabric_drop_wwn) {
 435                 pr_err("Missing tfo->fabric_drop_wwn()\n");
 436                 return -EINVAL;
 437         }
 438         if (!tfo->fabric_make_tpg) {
 439                 pr_err("Missing tfo->fabric_make_tpg()\n");
 440                 return -EINVAL;
 441         }
 442         if (!tfo->fabric_drop_tpg) {
 443                 pr_err("Missing tfo->fabric_drop_tpg()\n");
 444                 return -EINVAL;
 445         }
 446
 447         return 0;
 448 }
 449
 450 int target_register_template(const struct target_core_fabric_ops *fo)
 451 {
 452         struct target_fabric_configfs *tf;
 453         int ret;
 454
 455         ret = target_fabric_tf_ops_check(fo);
 456         if (ret)
 457                 return ret;
 458
 459         tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
 460         if (!tf) {
 461                 pr_err("%s: could not allocate memory!\n", __func__);
 462                 return -ENOMEM;
 463         }
 464
 465         INIT_LIST_HEAD(&tf->tf_list);
 466         atomic_set(&tf->tf_access_cnt, 0);
 467
 468         /*
 469          * Setup the default generic struct config_item_type's (cits) in
 470          * struct target_fabric_configfs->tf_cit_tmpl
 471          */
 472         tf->tf_module = fo->module;
 473         snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", fo->name);
 474
 475         tf->tf_ops = *fo;
 476         target_fabric_setup_cits(tf);
 477
 478         mutex_lock(&g_tf_lock);
 479         list_add_tail(&tf->tf_list, &g_tf_list);
 480         mutex_unlock(&g_tf_lock);
 481
 482         return 0;
 483 }
 484 EXPORT_SYMBOL(target_register_template);
 485
 486 void target_unregister_template(const struct target_core_fabric_ops *fo)
 487 {
 488         struct target_fabric_configfs *t;
 489
 490         mutex_lock(&g_tf_lock);
 491         list_for_each_entry(t, &g_tf_list, tf_list) {
 492                 if (!strcmp(t->tf_name, fo->name)) {
 493                         BUG_ON(atomic_read(&t->tf_access_cnt));
 494                         list_del(&t->tf_list);
 495                         kfree(t);
 496                         break;
 497                 }
 498         }
 499         mutex_unlock(&g_tf_lock);
 500 }
 501 EXPORT_SYMBOL(target_unregister_template);
 502
 503 /*##############################################################################
 504 // Stop functions called by external Target Fabrics Modules
 505 //############################################################################*/
 506
 507 /* Start functions for struct config_item_type tb_dev_attrib_cit */
 508
 509 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
 510 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
 511
 512 static struct configfs_item_operations target_core_dev_attrib_ops = {
 513         .show_attribute         = target_core_dev_attrib_attr_show,
 514         .store_attribute        = target_core_dev_attrib_attr_store,
 515 };
 516
 517 TB_CIT_SETUP(dev_attrib, &target_core_dev_attrib_ops, NULL, NULL);
 518
 519 /* End functions for struct config_item_type tb_dev_attrib_cit */
 520
 521 /*  Start functions for struct config_item_type tb_dev_wwn_cit */
 522
 523 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
 524 #define SE_DEV_WWN_ATTR(_name, _mode)                                   \
 525 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
 526                 __CONFIGFS_EATTR(_name, _mode,                          \
 527                 target_core_dev_wwn_show_attr_##_name,                  \
 528                 target_core_dev_wwn_store_attr_##_name);
 529
 530 #define SE_DEV_WWN_ATTR_RO(_name);                                      \
 531 do {                                                                    \
 532         static struct target_core_dev_wwn_attribute                     \
 533                         target_core_dev_wwn_##_name =                   \
 534                 __CONFIGFS_EATTR_RO(_name,                              \
 535                 target_core_dev_wwn_show_attr_##_name);                 \
 536 } while (0);
 537
 538 /*
 539  * VPD page 0x80 Unit serial
 540  */
 541 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
 542         struct t10_wwn *t10_wwn,
 543         char *page)
 544 {
 545         return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
 546                 &t10_wwn->unit_serial[0]);
 547 }
 548
 549 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
 550         struct t10_wwn *t10_wwn,
 551         const char *page,
 552         size_t count)
 553 {
 554         struct se_device *dev = t10_wwn->t10_dev;
 555         unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
 556
 557         /*
 558          * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
 559          * from the struct scsi_device level firmware, do not allow
 560          * VPD Unit Serial to be emulated.
 561          *
 562          * Note this struct scsi_device could also be emulating VPD
 563          * information from its drivers/scsi LLD.  But for now we assume
 564          * it is doing 'the right thing' wrt a world wide unique
 565          * VPD Unit Serial Number that OS dependent multipath can depend on.
 566          */
 567         if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
 568                 pr_err("Underlying SCSI device firmware provided VPD"
 569                         " Unit Serial, ignoring request\n");
 570                 return -EOPNOTSUPP;
 571         }
 572
 573         if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
 574                 pr_err("Emulated VPD Unit Serial exceeds"
 575                 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
 576                 return -EOVERFLOW;
 577         }
 578         /*
 579          * Check to see if any active $FABRIC_MOD exports exist.  If they
 580          * do exist, fail here as changing this information on the fly
 581          * (underneath the initiator side OS dependent multipath code)
 582          * could cause negative effects.
 583          */
 584         if (dev->export_count) {
 585                 pr_err("Unable to set VPD Unit Serial while"
 586                         " active %d $FABRIC_MOD exports exist\n",
 587                         dev->export_count);
 588                 return -EINVAL;
 589         }
 590
 591         /*
 592          * This currently assumes ASCII encoding for emulated VPD Unit Serial.
 593          *
 594          * Also, strip any newline added from the userspace
 595          * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
 596          */
 597         memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
 598         snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
 599         snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
 600                         "%s", strstrip(buf));
 601         dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
 602
 603         pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
 604                         " %s\n", dev->t10_wwn.unit_serial);
 605
 606         return count;
 607 }
 608
 609 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
 610
 611 /*
 612  * VPD page 0x83 Protocol Identifier
 613  */
 614 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
 615         struct t10_wwn *t10_wwn,
 616         char *page)
 617 {
 618         struct t10_vpd *vpd;
 619         unsigned char buf[VPD_TMP_BUF_SIZE];
 620         ssize_t len = 0;
 621
 622         memset(buf, 0, VPD_TMP_BUF_SIZE);
 623
 624         spin_lock(&t10_wwn->t10_vpd_lock);
 625         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
 626                 if (!vpd->protocol_identifier_set)
 627                         continue;
 628
 629                 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
 630
 631                 if (len + strlen(buf) >= PAGE_SIZE)
 632                         break;
 633
 634                 len += sprintf(page+len, "%s", buf);
 635         }
 636         spin_unlock(&t10_wwn->t10_vpd_lock);
 637
 638         return len;
 639 }
 640
 641 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
 642         struct t10_wwn *t10_wwn,
 643         const char *page,
 644         size_t count)
 645 {
 646         return -ENOSYS;
 647 }
 648
 649 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
 650
 651 /*
 652  * Generic wrapper for dumping VPD identifiers by association.
 653  */
 654 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc)                           \
 655 static ssize_t target_core_dev_wwn_show_attr_##_name(                   \
 656         struct t10_wwn *t10_wwn,                                        \
 657         char *page)                                                     \
 658 {                                                                       \
 659         struct t10_vpd *vpd;                                                    \
 660         unsigned char buf[VPD_TMP_BUF_SIZE];                            \
 661         ssize_t len = 0;                                                \
 662                                                                         \
 663         spin_lock(&t10_wwn->t10_vpd_lock);                              \
 664         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {    \
 665                 if (vpd->association != _assoc)                         \
 666                         continue;                                       \
 667                                                                         \
 668                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 669                 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE);   \
 670                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 671                         break;                                          \
 672                 len += sprintf(page+len, "%s", buf);                    \
 673                                                                         \
 674                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 675                 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
 676                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 677                         break;                                          \
 678                 len += sprintf(page+len, "%s", buf);                    \
 679                                                                         \
 680                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 681                 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
 682                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 683                         break;                                          \
 684                 len += sprintf(page+len, "%s", buf);                    \
 685         }                                                               \
 686         spin_unlock(&t10_wwn->t10_vpd_lock);                            \
 687                                                                         \
 688         return len;                                                     \
 689 }
 690
 691 /*
 692  * VPD page 0x83 Association: Logical Unit
 693  */
 694 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
 695
 696 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
 697         struct t10_wwn *t10_wwn,
 698         const char *page,
 699         size_t count)
 700 {
 701         return -ENOSYS;
 702 }
 703
 704 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
 705
 706 /*
 707  * VPD page 0x83 Association: Target Port
 708  */
 709 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
 710
 711 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
 712         struct t10_wwn *t10_wwn,
 713         const char *page,
 714         size_t count)
 715 {
 716         return -ENOSYS;
 717 }
 718
 719 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
 720
 721 /*
 722  * VPD page 0x83 Association: SCSI Target Device
 723  */
 724 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
 725
 726 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
 727         struct t10_wwn *t10_wwn,
 728         const char *page,
 729         size_t count)
 730 {
 731         return -ENOSYS;
 732 }
 733
 734 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
 735
 736 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
 737
 738 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
 739         &target_core_dev_wwn_vpd_unit_serial.attr,
 740         &target_core_dev_wwn_vpd_protocol_identifier.attr,
 741         &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
 742         &target_core_dev_wwn_vpd_assoc_target_port.attr,
 743         &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
 744         NULL,
 745 };
 746
 747 static struct configfs_item_operations target_core_dev_wwn_ops = {
 748         .show_attribute         = target_core_dev_wwn_attr_show,
 749         .store_attribute        = target_core_dev_wwn_attr_store,
 750 };
 751
 752 TB_CIT_SETUP(dev_wwn, &target_core_dev_wwn_ops, NULL, target_core_dev_wwn_attrs);
 753
 754 /*  End functions for struct config_item_type tb_dev_wwn_cit */
 755
 756 /*  Start functions for struct config_item_type tb_dev_pr_cit */
 757
 758 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
 759 #define SE_DEV_PR_ATTR(_name, _mode)                                    \
 760 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
 761         __CONFIGFS_EATTR(_name, _mode,                                  \
 762         target_core_dev_pr_show_attr_##_name,                           \
 763         target_core_dev_pr_store_attr_##_name);
 764
 765 #define SE_DEV_PR_ATTR_RO(_name);                                       \
 766 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
 767         __CONFIGFS_EATTR_RO(_name,                                      \
 768         target_core_dev_pr_show_attr_##_name);
 769
 770 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
 771                 char *page)
 772 {
 773         struct se_node_acl *se_nacl;
 774         struct t10_pr_registration *pr_reg;
 775         char i_buf[PR_REG_ISID_ID_LEN];
 776
 777         memset(i_buf, 0, PR_REG_ISID_ID_LEN);
 778
 779         pr_reg = dev->dev_pr_res_holder;
 780         if (!pr_reg)
 781                 return sprintf(page, "No SPC-3 Reservation holder\n");
 782
 783         se_nacl = pr_reg->pr_reg_nacl;
 784         core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
 785
 786         return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
 787                 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
 788                 se_nacl->initiatorname, i_buf);
 789 }
 790
 791 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
 792                 char *page)
 793 {
 794         struct se_node_acl *se_nacl;
 795         ssize_t len;
 796
 797         se_nacl = dev->dev_reserved_node_acl;
 798         if (se_nacl) {
 799                 len = sprintf(page,
 800                               "SPC-2 Reservation: %s Initiator: %s\n",
 801                               se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
 802                               se_nacl->initiatorname);
 803         } else {
 804                 len = sprintf(page, "No SPC-2 Reservation holder\n");
 805         }
 806         return len;
 807 }
 808
 809 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
 810                 char *page)
 811 {
 812         int ret;
 813
 814         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
 815                 return sprintf(page, "Passthrough\n");
 816
 817         spin_lock(&dev->dev_reservation_lock);
 818         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
 819                 ret = target_core_dev_pr_show_spc2_res(dev, page);
 820         else
 821                 ret = target_core_dev_pr_show_spc3_res(dev, page);
 822         spin_unlock(&dev->dev_reservation_lock);
 823         return ret;
 824 }
 825
 826 SE_DEV_PR_ATTR_RO(res_holder);
 827
 828 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
 829                 struct se_device *dev, char *page)
 830 {
 831         ssize_t len = 0;
 832
 833         spin_lock(&dev->dev_reservation_lock);
 834         if (!dev->dev_pr_res_holder) {
 835                 len = sprintf(page, "No SPC-3 Reservation holder\n");
 836         } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
 837                 len = sprintf(page, "SPC-3 Reservation: All Target"
 838                         " Ports registration\n");
 839         } else {
 840                 len = sprintf(page, "SPC-3 Reservation: Single"
 841                         " Target Port registration\n");
 842         }
 843
 844         spin_unlock(&dev->dev_reservation_lock);
 845         return len;
 846 }
 847
 848 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
 849
 850 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
 851                 struct se_device *dev, char *page)
 852 {
 853         return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
 854 }
 855
 856 SE_DEV_PR_ATTR_RO(res_pr_generation);
 857
 858 /*
 859  * res_pr_holder_tg_port
 860  */
 861 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
 862                 struct se_device *dev, char *page)
 863 {
 864         struct se_node_acl *se_nacl;
 865         struct se_lun *lun;
 866         struct se_portal_group *se_tpg;
 867         struct t10_pr_registration *pr_reg;
 868         const struct target_core_fabric_ops *tfo;
 869         ssize_t len = 0;
 870
 871         spin_lock(&dev->dev_reservation_lock);
 872         pr_reg = dev->dev_pr_res_holder;
 873         if (!pr_reg) {
 874                 len = sprintf(page, "No SPC-3 Reservation holder\n");
 875                 goto out_unlock;
 876         }
 877
 878         se_nacl = pr_reg->pr_reg_nacl;
 879         se_tpg = se_nacl->se_tpg;
 880         lun = pr_reg->pr_reg_tg_pt_lun;
 881         tfo = se_tpg->se_tpg_tfo;
 882
 883         len += sprintf(page+len, "SPC-3 Reservation: %s"
 884                 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
 885                 tfo->tpg_get_wwn(se_tpg));
 886         len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
 887                 " Identifier Tag: %hu %s Portal Group Tag: %hu"
 888                 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
 889                 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
 890                 tfo->get_fabric_name(), lun->unpacked_lun);
 891
 892 out_unlock:
 893         spin_unlock(&dev->dev_reservation_lock);
 894         return len;
 895 }
 896
 897 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
 898
 899 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
 900                 struct se_device *dev, char *page)
 901 {
 902         const struct target_core_fabric_ops *tfo;
 903         struct t10_pr_registration *pr_reg;
 904         unsigned char buf[384];
 905         char i_buf[PR_REG_ISID_ID_LEN];
 906         ssize_t len = 0;
 907         int reg_count = 0;
 908
 909         len += sprintf(page+len, "SPC-3 PR Registrations:\n");
 910
 911         spin_lock(&dev->t10_pr.registration_lock);
 912         list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
 913                         pr_reg_list) {
 914
 915                 memset(buf, 0, 384);
 916                 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
 917                 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
 918                 core_pr_dump_initiator_port(pr_reg, i_buf,
 919                                         PR_REG_ISID_ID_LEN);
 920                 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
 921                         tfo->get_fabric_name(),
 922                         pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
 923                         pr_reg->pr_res_generation);
 924
 925                 if (len + strlen(buf) >= PAGE_SIZE)
 926                         break;
 927
 928                 len += sprintf(page+len, "%s", buf);
 929                 reg_count++;
 930         }
 931         spin_unlock(&dev->t10_pr.registration_lock);
 932
 933         if (!reg_count)
 934                 len += sprintf(page+len, "None\n");
 935
 936         return len;
 937 }
 938
 939 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
 940
 941 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
 942                 struct se_device *dev, char *page)
 943 {
 944         struct t10_pr_registration *pr_reg;
 945         ssize_t len = 0;
 946
 947         spin_lock(&dev->dev_reservation_lock);
 948         pr_reg = dev->dev_pr_res_holder;
 949         if (pr_reg) {
 950                 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
 951                         core_scsi3_pr_dump_type(pr_reg->pr_res_type));
 952         } else {
 953                 len = sprintf(page, "No SPC-3 Reservation holder\n");
 954         }
 955
 956         spin_unlock(&dev->dev_reservation_lock);
 957         return len;
 958 }
 959
 960 SE_DEV_PR_ATTR_RO(res_pr_type);
 961
 962 static ssize_t target_core_dev_pr_show_attr_res_type(
 963                 struct se_device *dev, char *page)
 964 {
 965         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
 966                 return sprintf(page, "SPC_PASSTHROUGH\n");
 967         else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
 968                 return sprintf(page, "SPC2_RESERVATIONS\n");
 969         else
 970                 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
 971 }
 972
 973 SE_DEV_PR_ATTR_RO(res_type);
 974
 975 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
 976                 struct se_device *dev, char *page)
 977 {
 978         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
 979                 return 0;
 980
 981         return sprintf(page, "APTPL Bit Status: %s\n",
 982                 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
 983 }
 984
 985 SE_DEV_PR_ATTR_RO(res_aptpl_active);
 986
 987 /*
 988  * res_aptpl_metadata
 989  */
 990 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
 991                 struct se_device *dev, char *page)
 992 {
 993         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
 994                 return 0;
 995
 996         return sprintf(page, "Ready to process PR APTPL metadata..\n");
 997 }
 998
 999 enum {
1000         Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1001         Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1002         Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1003         Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1004 };
1005
1006 static match_table_t tokens = {
1007         {Opt_initiator_fabric, "initiator_fabric=%s"},
1008         {Opt_initiator_node, "initiator_node=%s"},
1009         {Opt_initiator_sid, "initiator_sid=%s"},
1010         {Opt_sa_res_key, "sa_res_key=%s"},
1011         {Opt_res_holder, "res_holder=%d"},
1012         {Opt_res_type, "res_type=%d"},
1013         {Opt_res_scope, "res_scope=%d"},
1014         {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1015         {Opt_mapped_lun, "mapped_lun=%d"},
1016         {Opt_target_fabric, "target_fabric=%s"},
1017         {Opt_target_node, "target_node=%s"},
1018         {Opt_tpgt, "tpgt=%d"},
1019         {Opt_port_rtpi, "port_rtpi=%d"},
1020         {Opt_target_lun, "target_lun=%d"},
1021         {Opt_err, NULL}
1022 };
1023
1024 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1025         struct se_device *dev,
1026         const char *page,
1027         size_t count)
1028 {
1029         unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1030         unsigned char *t_fabric = NULL, *t_port = NULL;
1031         char *orig, *ptr, *opts;
1032         substring_t args[MAX_OPT_ARGS];
1033         unsigned long long tmp_ll;
1034         u64 sa_res_key = 0;
1035         u32 mapped_lun = 0, target_lun = 0;
1036         int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1037         u16 port_rpti = 0, tpgt = 0;
1038         u8 type = 0, scope;
1039
1040         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1041                 return 0;
1042         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1043                 return 0;
1044
1045         if (dev->export_count) {
1046                 pr_debug("Unable to process APTPL metadata while"
1047                         " active fabric exports exist\n");
1048                 return -EINVAL;
1049         }
1050
1051         opts = kstrdup(page, GFP_KERNEL);
1052         if (!opts)
1053                 return -ENOMEM;
1054
1055         orig = opts;
1056         while ((ptr = strsep(&opts, ",\n")) != NULL) {
1057                 if (!*ptr)
1058                         continue;
1059
1060                 token = match_token(ptr, tokens, args);
1061                 switch (token) {
1062                 case Opt_initiator_fabric:
1063                         i_fabric = match_strdup(args);
1064                         if (!i_fabric) {
1065                                 ret = -ENOMEM;
1066                                 goto out;
1067                         }
1068                         break;
1069                 case Opt_initiator_node:
1070                         i_port = match_strdup(args);
1071                         if (!i_port) {
1072                                 ret = -ENOMEM;
1073                                 goto out;
1074                         }
1075                         if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1076                                 pr_err("APTPL metadata initiator_node="
1077                                         " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1078                                         PR_APTPL_MAX_IPORT_LEN);
1079                                 ret = -EINVAL;
1080                                 break;
1081                         }
1082                         break;
1083                 case Opt_initiator_sid:
1084                         isid = match_strdup(args);
1085                         if (!isid) {
1086                                 ret = -ENOMEM;
1087                                 goto out;
1088                         }
1089                         if (strlen(isid) >= PR_REG_ISID_LEN) {
1090                                 pr_err("APTPL metadata initiator_isid"
1091                                         "= exceeds PR_REG_ISID_LEN: %d\n",
1092                                         PR_REG_ISID_LEN);
1093                                 ret = -EINVAL;
1094                                 break;
1095                         }
1096                         break;
1097                 case Opt_sa_res_key:
1098                         ret = kstrtoull(args->from, 0, &tmp_ll);
1099                         if (ret < 0) {
1100                                 pr_err("kstrtoull() failed for sa_res_key=\n");
1101                                 goto out;
1102                         }
1103                         sa_res_key = (u64)tmp_ll;
1104                         break;
1105                 /*
1106                  * PR APTPL Metadata for Reservation
1107                  */
1108                 case Opt_res_holder:
1109                         match_int(args, &arg);
1110                         res_holder = arg;
1111                         break;
1112                 case Opt_res_type:
1113                         match_int(args, &arg);
1114                         type = (u8)arg;
1115                         break;
1116                 case Opt_res_scope:
1117                         match_int(args, &arg);
1118                         scope = (u8)arg;
1119                         break;
1120                 case Opt_res_all_tg_pt:
1121                         match_int(args, &arg);
1122                         all_tg_pt = (int)arg;
1123                         break;
1124                 case Opt_mapped_lun:
1125                         match_int(args, &arg);
1126                         mapped_lun = (u32)arg;
1127                         break;
1128                 /*
1129                  * PR APTPL Metadata for Target Port
1130                  */
1131                 case Opt_target_fabric:
1132                         t_fabric = match_strdup(args);
1133                         if (!t_fabric) {
1134                                 ret = -ENOMEM;
1135                                 goto out;
1136                         }
1137                         break;
1138                 case Opt_target_node:
1139                         t_port = match_strdup(args);
1140                         if (!t_port) {
1141                                 ret = -ENOMEM;
1142                                 goto out;
1143                         }
1144                         if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1145                                 pr_err("APTPL metadata target_node="
1146                                         " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1147                                         PR_APTPL_MAX_TPORT_LEN);
1148                                 ret = -EINVAL;
1149                                 break;
1150                         }
1151                         break;
1152                 case Opt_tpgt:
1153                         match_int(args, &arg);
1154                         tpgt = (u16)arg;
1155                         break;
1156                 case Opt_port_rtpi:
1157                         match_int(args, &arg);
1158                         port_rpti = (u16)arg;
1159                         break;
1160                 case Opt_target_lun:
1161                         match_int(args, &arg);
1162                         target_lun = (u32)arg;
1163                         break;
1164                 default:
1165                         break;
1166                 }
1167         }
1168
1169         if (!i_port || !t_port || !sa_res_key) {
1170                 pr_err("Illegal parameters for APTPL registration\n");
1171                 ret = -EINVAL;
1172                 goto out;
1173         }
1174
1175         if (res_holder && !(type)) {
1176                 pr_err("Illegal PR type: 0x%02x for reservation"
1177                                 " holder\n", type);
1178                 ret = -EINVAL;
1179                 goto out;
1180         }
1181
1182         ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1183                         i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1184                         res_holder, all_tg_pt, type);
1185 out:
1186         kfree(i_fabric);
1187         kfree(i_port);
1188         kfree(isid);
1189         kfree(t_fabric);
1190         kfree(t_port);
1191         kfree(orig);
1192         return (ret == 0) ? count : ret;
1193 }
1194
1195 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1196
1197 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
1198
1199 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1200         &target_core_dev_pr_res_holder.attr,
1201         &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1202         &target_core_dev_pr_res_pr_generation.attr,
1203         &target_core_dev_pr_res_pr_holder_tg_port.attr,
1204         &target_core_dev_pr_res_pr_registered_i_pts.attr,
1205         &target_core_dev_pr_res_pr_type.attr,
1206         &target_core_dev_pr_res_type.attr,
1207         &target_core_dev_pr_res_aptpl_active.attr,
1208         &target_core_dev_pr_res_aptpl_metadata.attr,
1209         NULL,
1210 };
1211
1212 static struct configfs_item_operations target_core_dev_pr_ops = {
1213         .show_attribute         = target_core_dev_pr_attr_show,
1214         .store_attribute        = target_core_dev_pr_attr_store,
1215 };
1216
1217 TB_CIT_SETUP(dev_pr, &target_core_dev_pr_ops, NULL, target_core_dev_pr_attrs);
1218
1219 /*  End functions for struct config_item_type tb_dev_pr_cit */
1220
1221 /*  Start functions for struct config_item_type tb_dev_cit */
1222
1223 static ssize_t target_core_show_dev_info(void *p, char *page)
1224 {
1225         struct se_device *dev = p;
1226         struct se_subsystem_api *t = dev->transport;
1227         int bl = 0;
1228         ssize_t read_bytes = 0;
1229
1230         transport_dump_dev_state(dev, page, &bl);
1231         read_bytes += bl;
1232         read_bytes += t->show_configfs_dev_params(dev, page+read_bytes);
1233         return read_bytes;
1234 }
1235
1236 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1237         .attr   = { .ca_owner = THIS_MODULE,
1238                     .ca_name = "info",
1239                     .ca_mode = S_IRUGO },
1240         .show   = target_core_show_dev_info,
1241         .store  = NULL,
1242 };
1243
1244 static ssize_t target_core_store_dev_control(
1245         void *p,
1246         const char *page,
1247         size_t count)
1248 {
1249         struct se_device *dev = p;
1250         struct se_subsystem_api *t = dev->transport;
1251
1252         return t->set_configfs_dev_params(dev, page, count);
1253 }
1254
1255 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1256         .attr   = { .ca_owner = THIS_MODULE,
1257                     .ca_name = "control",
1258                     .ca_mode = S_IWUSR },
1259         .show   = NULL,
1260         .store  = target_core_store_dev_control,
1261 };
1262
1263 static ssize_t target_core_show_dev_alias(void *p, char *page)
1264 {
1265         struct se_device *dev = p;
1266
1267         if (!(dev->dev_flags & DF_USING_ALIAS))
1268                 return 0;
1269
1270         return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1271 }
1272
1273 static ssize_t target_core_store_dev_alias(
1274         void *p,
1275         const char *page,
1276         size_t count)
1277 {
1278         struct se_device *dev = p;
1279         struct se_hba *hba = dev->se_hba;
1280         ssize_t read_bytes;
1281
1282         if (count > (SE_DEV_ALIAS_LEN-1)) {
1283                 pr_err("alias count: %d exceeds"
1284                         " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1285                         SE_DEV_ALIAS_LEN-1);
1286                 return -EINVAL;
1287         }
1288
1289         read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1290         if (!read_bytes)
1291                 return -EINVAL;
1292         if (dev->dev_alias[read_bytes - 1] == '\n')
1293                 dev->dev_alias[read_bytes - 1] = '\0';
1294
1295         dev->dev_flags |= DF_USING_ALIAS;
1296
1297         pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1298                 config_item_name(&hba->hba_group.cg_item),
1299                 config_item_name(&dev->dev_group.cg_item),
1300                 dev->dev_alias);
1301
1302         return read_bytes;
1303 }
1304
1305 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1306         .attr   = { .ca_owner = THIS_MODULE,
1307                     .ca_name = "alias",
1308                     .ca_mode =  S_IRUGO | S_IWUSR },
1309         .show   = target_core_show_dev_alias,
1310         .store  = target_core_store_dev_alias,
1311 };
1312
1313 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1314 {
1315         struct se_device *dev = p;
1316
1317         if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1318                 return 0;
1319
1320         return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1321 }
1322
1323 static ssize_t target_core_store_dev_udev_path(
1324         void *p,
1325         const char *page,
1326         size_t count)
1327 {
1328         struct se_device *dev = p;
1329         struct se_hba *hba = dev->se_hba;
1330         ssize_t read_bytes;
1331
1332         if (count > (SE_UDEV_PATH_LEN-1)) {
1333                 pr_err("udev_path count: %d exceeds"
1334                         " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1335                         SE_UDEV_PATH_LEN-1);
1336                 return -EINVAL;
1337         }
1338
1339         read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1340                         "%s", page);
1341         if (!read_bytes)
1342                 return -EINVAL;
1343         if (dev->udev_path[read_bytes - 1] == '\n')
1344                 dev->udev_path[read_bytes - 1] = '\0';
1345
1346         dev->dev_flags |= DF_USING_UDEV_PATH;
1347
1348         pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1349                 config_item_name(&hba->hba_group.cg_item),
1350                 config_item_name(&dev->dev_group.cg_item),
1351                 dev->udev_path);
1352
1353         return read_bytes;
1354 }
1355
1356 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1357         .attr   = { .ca_owner = THIS_MODULE,
1358                     .ca_name = "udev_path",
1359                     .ca_mode =  S_IRUGO | S_IWUSR },
1360         .show   = target_core_show_dev_udev_path,
1361         .store  = target_core_store_dev_udev_path,
1362 };
1363
1364 static ssize_t target_core_show_dev_enable(void *p, char *page)
1365 {
1366         struct se_device *dev = p;
1367
1368         return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1369 }
1370
1371 static ssize_t target_core_store_dev_enable(
1372         void *p,
1373         const char *page,
1374         size_t count)
1375 {
1376         struct se_device *dev = p;
1377         char *ptr;
1378         int ret;
1379
1380         ptr = strstr(page, "1");
1381         if (!ptr) {
1382                 pr_err("For dev_enable ops, only valid value"
1383                                 " is \"1\"\n");
1384                 return -EINVAL;
1385         }
1386
1387         ret = target_configure_device(dev);
1388         if (ret)
1389                 return ret;
1390         return count;
1391 }
1392
1393 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1394         .attr   = { .ca_owner = THIS_MODULE,
1395                     .ca_name = "enable",
1396                     .ca_mode =  S_IRUGO | S_IWUSR },
1397         .show   = target_core_show_dev_enable,
1398         .store  = target_core_store_dev_enable,
1399 };
1400
1401 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1402 {
1403         struct se_device *dev = p;
1404         struct config_item *lu_ci;
1405         struct t10_alua_lu_gp *lu_gp;
1406         struct t10_alua_lu_gp_member *lu_gp_mem;
1407         ssize_t len = 0;
1408
1409         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1410         if (!lu_gp_mem)
1411                 return 0;
1412
1413         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1414         lu_gp = lu_gp_mem->lu_gp;
1415         if (lu_gp) {
1416                 lu_ci = &lu_gp->lu_gp_group.cg_item;
1417                 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1418                         config_item_name(lu_ci), lu_gp->lu_gp_id);
1419         }
1420         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1421
1422         return len;
1423 }
1424
1425 static ssize_t target_core_store_alua_lu_gp(
1426         void *p,
1427         const char *page,
1428         size_t count)
1429 {
1430         struct se_device *dev = p;
1431         struct se_hba *hba = dev->se_hba;
1432         struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1433         struct t10_alua_lu_gp_member *lu_gp_mem;
1434         unsigned char buf[LU_GROUP_NAME_BUF];
1435         int move = 0;
1436
1437         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1438         if (!lu_gp_mem)
1439                 return 0;
1440
1441         if (count > LU_GROUP_NAME_BUF) {
1442                 pr_err("ALUA LU Group Alias too large!\n");
1443                 return -EINVAL;
1444         }
1445         memset(buf, 0, LU_GROUP_NAME_BUF);
1446         memcpy(buf, page, count);
1447         /*
1448          * Any ALUA logical unit alias besides "NULL" means we will be
1449          * making a new group association.
1450          */
1451         if (strcmp(strstrip(buf), "NULL")) {
1452                 /*
1453                  * core_alua_get_lu_gp_by_name() will increment reference to
1454                  * struct t10_alua_lu_gp.  This reference is released with
1455                  * core_alua_get_lu_gp_by_name below().
1456                  */
1457                 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1458                 if (!lu_gp_new)
1459                         return -ENODEV;
1460         }
1461
1462         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1463         lu_gp = lu_gp_mem->lu_gp;
1464         if (lu_gp) {
1465                 /*
1466                  * Clearing an existing lu_gp association, and replacing
1467                  * with NULL
1468                  */
1469                 if (!lu_gp_new) {
1470                         pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1471                                 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1472                                 " %hu\n",
1473                                 config_item_name(&hba->hba_group.cg_item),
1474                                 config_item_name(&dev->dev_group.cg_item),
1475                                 config_item_name(&lu_gp->lu_gp_group.cg_item),
1476                                 lu_gp->lu_gp_id);
1477
1478                         __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1479                         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1480
1481                         return count;
1482                 }
1483                 /*
1484                  * Removing existing association of lu_gp_mem with lu_gp
1485                  */
1486                 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1487                 move = 1;
1488         }
1489         /*
1490          * Associate lu_gp_mem with lu_gp_new.
1491          */
1492         __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1493         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1494
1495         pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1496                 " core/alua/lu_gps/%s, ID: %hu\n",
1497                 (move) ? "Moving" : "Adding",
1498                 config_item_name(&hba->hba_group.cg_item),
1499                 config_item_name(&dev->dev_group.cg_item),
1500                 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1501                 lu_gp_new->lu_gp_id);
1502
1503         core_alua_put_lu_gp_from_name(lu_gp_new);
1504         return count;
1505 }
1506
1507 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1508         .attr   = { .ca_owner = THIS_MODULE,
1509                     .ca_name = "alua_lu_gp",
1510                     .ca_mode = S_IRUGO | S_IWUSR },
1511         .show   = target_core_show_alua_lu_gp,
1512         .store  = target_core_store_alua_lu_gp,
1513 };
1514
1515 static ssize_t target_core_show_dev_lba_map(void *p, char *page)
1516 {
1517         struct se_device *dev = p;
1518         struct t10_alua_lba_map *map;
1519         struct t10_alua_lba_map_member *mem;
1520         char *b = page;
1521         int bl = 0;
1522         char state;
1523
1524         spin_lock(&dev->t10_alua.lba_map_lock);
1525         if (!list_empty(&dev->t10_alua.lba_map_list))
1526             bl += sprintf(b + bl, "%u %u\n",
1527                           dev->t10_alua.lba_map_segment_size,
1528                           dev->t10_alua.lba_map_segment_multiplier);
1529         list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
1530                 bl += sprintf(b + bl, "%llu %llu",
1531                               map->lba_map_first_lba, map->lba_map_last_lba);
1532                 list_for_each_entry(mem, &map->lba_map_mem_list,
1533                                     lba_map_mem_list) {
1534                         switch (mem->lba_map_mem_alua_state) {
1535                         case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
1536                                 state = 'O';
1537                                 break;
1538                         case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
1539                                 state = 'A';
1540                                 break;
1541                         case ALUA_ACCESS_STATE_STANDBY:
1542                                 state = 'S';
1543                                 break;
1544                         case ALUA_ACCESS_STATE_UNAVAILABLE:
1545                                 state = 'U';
1546                                 break;
1547                         default:
1548                                 state = '.';
1549                                 break;
1550                         }
1551                         bl += sprintf(b + bl, " %d:%c",
1552                                       mem->lba_map_mem_alua_pg_id, state);
1553                 }
1554                 bl += sprintf(b + bl, "\n");
1555         }
1556         spin_unlock(&dev->t10_alua.lba_map_lock);
1557         return bl;
1558 }
1559
1560 static ssize_t target_core_store_dev_lba_map(
1561         void *p,
1562         const char *page,
1563         size_t count)
1564 {
1565         struct se_device *dev = p;
1566         struct t10_alua_lba_map *lba_map = NULL;
1567         struct list_head lba_list;
1568         char *map_entries, *ptr;
1569         char state;
1570         int pg_num = -1, pg;
1571         int ret = 0, num = 0, pg_id, alua_state;
1572         unsigned long start_lba = -1, end_lba = -1;
1573         unsigned long segment_size = -1, segment_mult = -1;
1574
1575         map_entries = kstrdup(page, GFP_KERNEL);
1576         if (!map_entries)
1577                 return -ENOMEM;
1578
1579         INIT_LIST_HEAD(&lba_list);
1580         while ((ptr = strsep(&map_entries, "\n")) != NULL) {
1581                 if (!*ptr)
1582                         continue;
1583
1584                 if (num == 0) {
1585                         if (sscanf(ptr, "%lu %lu\n",
1586                                    &segment_size, &segment_mult) != 2) {
1587                                 pr_err("Invalid line %d\n", num);
1588                                 ret = -EINVAL;
1589                                 break;
1590                         }
1591                         num++;
1592                         continue;
1593                 }
1594                 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
1595                         pr_err("Invalid line %d\n", num);
1596                         ret = -EINVAL;
1597                         break;
1598                 }
1599                 ptr = strchr(ptr, ' ');
1600                 if (!ptr) {
1601                         pr_err("Invalid line %d, missing end lba\n", num);
1602                         ret = -EINVAL;
1603                         break;
1604                 }
1605                 ptr++;
1606                 ptr = strchr(ptr, ' ');
1607                 if (!ptr) {
1608                         pr_err("Invalid line %d, missing state definitions\n",
1609                                num);
1610                         ret = -EINVAL;
1611                         break;
1612                 }
1613                 ptr++;
1614                 lba_map = core_alua_allocate_lba_map(&lba_list,
1615                                                      start_lba, end_lba);
1616                 if (IS_ERR(lba_map)) {
1617                         ret = PTR_ERR(lba_map);
1618                         break;
1619                 }
1620                 pg = 0;
1621                 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
1622                         switch (state) {
1623                         case 'O':
1624                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
1625                                 break;
1626                         case 'A':
1627                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
1628                                 break;
1629                         case 'S':
1630                                 alua_state = ALUA_ACCESS_STATE_STANDBY;
1631                                 break;
1632                         case 'U':
1633                                 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
1634                                 break;
1635                         default:
1636                                 pr_err("Invalid ALUA state '%c'\n", state);
1637                                 ret = -EINVAL;
1638                                 goto out;
1639                         }
1640
1641                         ret = core_alua_allocate_lba_map_mem(lba_map,
1642                                                              pg_id, alua_state);
1643                         if (ret) {
1644                                 pr_err("Invalid target descriptor %d:%c "
1645                                        "at line %d\n",
1646                                        pg_id, state, num);
1647                                 break;
1648                         }
1649                         pg++;
1650                         ptr = strchr(ptr, ' ');
1651                         if (ptr)
1652                                 ptr++;
1653                         else
1654                                 break;
1655                 }
1656                 if (pg_num == -1)
1657                     pg_num = pg;
1658                 else if (pg != pg_num) {
1659                         pr_err("Only %d from %d port groups definitions "
1660                                "at line %d\n", pg, pg_num, num);
1661                         ret = -EINVAL;
1662                         break;
1663                 }
1664                 num++;
1665         }
1666 out:
1667         if (ret) {
1668                 core_alua_free_lba_map(&lba_list);
1669                 count = ret;
1670         } else
1671                 core_alua_set_lba_map(dev, &lba_list,
1672                                       segment_size, segment_mult);
1673         kfree(map_entries);
1674         return count;
1675 }
1676
1677 static struct target_core_configfs_attribute target_core_attr_dev_lba_map = {
1678         .attr   = { .ca_owner = THIS_MODULE,
1679                     .ca_name = "lba_map",
1680                     .ca_mode = S_IRUGO | S_IWUSR },
1681         .show   = target_core_show_dev_lba_map,
1682         .store  = target_core_store_dev_lba_map,
1683 };
1684
1685 static struct configfs_attribute *target_core_dev_attrs[] = {
1686         &target_core_attr_dev_info.attr,
1687         &target_core_attr_dev_control.attr,
1688         &target_core_attr_dev_alias.attr,
1689         &target_core_attr_dev_udev_path.attr,
1690         &target_core_attr_dev_enable.attr,
1691         &target_core_attr_dev_alua_lu_gp.attr,
1692         &target_core_attr_dev_lba_map.attr,
1693         NULL,
1694 };
1695
1696 static void target_core_dev_release(struct config_item *item)
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
1702         kfree(dev_cg->default_groups);
1703         target_free_device(dev);
1704 }
1705
1706 static ssize_t target_core_dev_show(struct config_item *item,
1707                                      struct configfs_attribute *attr,
1708                                      char *page)
1709 {
1710         struct config_group *dev_cg = to_config_group(item);
1711         struct se_device *dev =
1712                 container_of(dev_cg, struct se_device, dev_group);
1713         struct target_core_configfs_attribute *tc_attr = container_of(
1714                         attr, struct target_core_configfs_attribute, attr);
1715
1716         if (!tc_attr->show)
1717                 return -EINVAL;
1718
1719         return tc_attr->show(dev, page);
1720 }
1721
1722 static ssize_t target_core_dev_store(struct config_item *item,
1723                                       struct configfs_attribute *attr,
1724                                       const char *page, size_t count)
1725 {
1726         struct config_group *dev_cg = to_config_group(item);
1727         struct se_device *dev =
1728                 container_of(dev_cg, struct se_device, dev_group);
1729         struct target_core_configfs_attribute *tc_attr = container_of(
1730                         attr, struct target_core_configfs_attribute, attr);
1731
1732         if (!tc_attr->store)
1733                 return -EINVAL;
1734
1735         return tc_attr->store(dev, page, count);
1736 }
1737
1738 static struct configfs_item_operations target_core_dev_item_ops = {
1739         .release                = target_core_dev_release,
1740         .show_attribute         = target_core_dev_show,
1741         .store_attribute        = target_core_dev_store,
1742 };
1743
1744 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
1745
1746 /* End functions for struct config_item_type tb_dev_cit */
1747
1748 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
1749
1750 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
1751 #define SE_DEV_ALUA_LU_ATTR(_name, _mode)                               \
1752 static struct target_core_alua_lu_gp_attribute                          \
1753                         target_core_alua_lu_gp_##_name =                \
1754         __CONFIGFS_EATTR(_name, _mode,                                  \
1755         target_core_alua_lu_gp_show_attr_##_name,                       \
1756         target_core_alua_lu_gp_store_attr_##_name);
1757
1758 #define SE_DEV_ALUA_LU_ATTR_RO(_name)                                   \
1759 static struct target_core_alua_lu_gp_attribute                          \
1760                         target_core_alua_lu_gp_##_name =                \
1761         __CONFIGFS_EATTR_RO(_name,                                      \
1762         target_core_alua_lu_gp_show_attr_##_name);
1763
1764 /*
1765  * lu_gp_id
1766  */
1767 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
1768         struct t10_alua_lu_gp *lu_gp,
1769         char *page)
1770 {
1771         if (!lu_gp->lu_gp_valid_id)
1772                 return 0;
1773
1774         return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
1775 }
1776
1777 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
1778         struct t10_alua_lu_gp *lu_gp,
1779         const char *page,
1780         size_t count)
1781 {
1782         struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
1783         unsigned long lu_gp_id;
1784         int ret;
1785
1786         ret = kstrtoul(page, 0, &lu_gp_id);
1787         if (ret < 0) {
1788                 pr_err("kstrtoul() returned %d for"
1789                         " lu_gp_id\n", ret);
1790                 return ret;
1791         }
1792         if (lu_gp_id > 0x0000ffff) {
1793                 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
1794                         " 0x0000ffff\n", lu_gp_id);
1795                 return -EINVAL;
1796         }
1797
1798         ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
1799         if (ret < 0)
1800                 return -EINVAL;
1801
1802         pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
1803                 " Group: core/alua/lu_gps/%s to ID: %hu\n",
1804                 config_item_name(&alua_lu_gp_cg->cg_item),
1805                 lu_gp->lu_gp_id);
1806
1807         return count;
1808 }
1809
1810 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
1811
1812 /*
1813  * members
1814  */
1815 static ssize_t target_core_alua_lu_gp_show_attr_members(
1816         struct t10_alua_lu_gp *lu_gp,
1817         char *page)
1818 {
1819         struct se_device *dev;
1820         struct se_hba *hba;
1821         struct t10_alua_lu_gp_member *lu_gp_mem;
1822         ssize_t len = 0, cur_len;
1823         unsigned char buf[LU_GROUP_NAME_BUF];
1824
1825         memset(buf, 0, LU_GROUP_NAME_BUF);
1826
1827         spin_lock(&lu_gp->lu_gp_lock);
1828         list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
1829                 dev = lu_gp_mem->lu_gp_mem_dev;
1830                 hba = dev->se_hba;
1831
1832                 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
1833                         config_item_name(&hba->hba_group.cg_item),
1834                         config_item_name(&dev->dev_group.cg_item));
1835                 cur_len++; /* Extra byte for NULL terminator */
1836
1837                 if ((cur_len + len) > PAGE_SIZE) {
1838                         pr_warn("Ran out of lu_gp_show_attr"
1839                                 "_members buffer\n");
1840                         break;
1841                 }
1842                 memcpy(page+len, buf, cur_len);
1843                 len += cur_len;
1844         }
1845         spin_unlock(&lu_gp->lu_gp_lock);
1846
1847         return len;
1848 }
1849
1850 SE_DEV_ALUA_LU_ATTR_RO(members);
1851
1852 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
1853
1854 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
1855         &target_core_alua_lu_gp_lu_gp_id.attr,
1856         &target_core_alua_lu_gp_members.attr,
1857         NULL,
1858 };
1859
1860 static void target_core_alua_lu_gp_release(struct config_item *item)
1861 {
1862         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1863                         struct t10_alua_lu_gp, lu_gp_group);
1864
1865         core_alua_free_lu_gp(lu_gp);
1866 }
1867
1868 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
1869         .release                = target_core_alua_lu_gp_release,
1870         .show_attribute         = target_core_alua_lu_gp_attr_show,
1871         .store_attribute        = target_core_alua_lu_gp_attr_store,
1872 };
1873
1874 static struct config_item_type target_core_alua_lu_gp_cit = {
1875         .ct_item_ops            = &target_core_alua_lu_gp_ops,
1876         .ct_attrs               = target_core_alua_lu_gp_attrs,
1877         .ct_owner               = THIS_MODULE,
1878 };
1879
1880 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
1881
1882 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
1883
1884 static struct config_group *target_core_alua_create_lu_gp(
1885         struct config_group *group,
1886         const char *name)
1887 {
1888         struct t10_alua_lu_gp *lu_gp;
1889         struct config_group *alua_lu_gp_cg = NULL;
1890         struct config_item *alua_lu_gp_ci = NULL;
1891
1892         lu_gp = core_alua_allocate_lu_gp(name, 0);
1893         if (IS_ERR(lu_gp))
1894                 return NULL;
1895
1896         alua_lu_gp_cg = &lu_gp->lu_gp_group;
1897         alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
1898
1899         config_group_init_type_name(alua_lu_gp_cg, name,
1900                         &target_core_alua_lu_gp_cit);
1901
1902         pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
1903                 " Group: core/alua/lu_gps/%s\n",
1904                 config_item_name(alua_lu_gp_ci));
1905
1906         return alua_lu_gp_cg;
1907
1908 }
1909
1910 static void target_core_alua_drop_lu_gp(
1911         struct config_group *group,
1912         struct config_item *item)
1913 {
1914         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1915                         struct t10_alua_lu_gp, lu_gp_group);
1916
1917         pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
1918                 " Group: core/alua/lu_gps/%s, ID: %hu\n",
1919                 config_item_name(item), lu_gp->lu_gp_id);
1920         /*
1921          * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
1922          * -> target_core_alua_lu_gp_release()
1923          */
1924         config_item_put(item);
1925 }
1926
1927 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
1928         .make_group             = &target_core_alua_create_lu_gp,
1929         .drop_item              = &target_core_alua_drop_lu_gp,
1930 };
1931
1932 static struct config_item_type target_core_alua_lu_gps_cit = {
1933         .ct_item_ops            = NULL,
1934         .ct_group_ops           = &target_core_alua_lu_gps_group_ops,
1935         .ct_owner               = THIS_MODULE,
1936 };
1937
1938 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
1939
1940 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
1941
1942 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
1943 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode)                            \
1944 static struct target_core_alua_tg_pt_gp_attribute                       \
1945                         target_core_alua_tg_pt_gp_##_name =             \
1946         __CONFIGFS_EATTR(_name, _mode,                                  \
1947         target_core_alua_tg_pt_gp_show_attr_##_name,                    \
1948         target_core_alua_tg_pt_gp_store_attr_##_name);
1949
1950 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name)                                \
1951 static struct target_core_alua_tg_pt_gp_attribute                       \
1952                         target_core_alua_tg_pt_gp_##_name =             \
1953         __CONFIGFS_EATTR_RO(_name,                                      \
1954         target_core_alua_tg_pt_gp_show_attr_##_name);
1955
1956 /*
1957  * alua_access_state
1958  */
1959 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
1960         struct t10_alua_tg_pt_gp *tg_pt_gp,
1961         char *page)
1962 {
1963         return sprintf(page, "%d\n",
1964                 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
1965 }
1966
1967 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
1968         struct t10_alua_tg_pt_gp *tg_pt_gp,
1969         const char *page,
1970         size_t count)
1971 {
1972         struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
1973         unsigned long tmp;
1974         int new_state, ret;
1975
1976         if (!tg_pt_gp->tg_pt_gp_valid_id) {
1977                 pr_err("Unable to do implicit ALUA on non valid"
1978                         " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
1979                 return -EINVAL;
1980         }
1981         if (!(dev->dev_flags & DF_CONFIGURED)) {
1982                 pr_err("Unable to set alua_access_state while device is"
1983                        " not configured\n");
1984                 return -ENODEV;
1985         }
1986
1987         ret = kstrtoul(page, 0, &tmp);
1988         if (ret < 0) {
1989                 pr_err("Unable to extract new ALUA access state from"
1990                                 " %s\n", page);
1991                 return ret;
1992         }
1993         new_state = (int)tmp;
1994
1995         if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
1996                 pr_err("Unable to process implicit configfs ALUA"
1997                         " transition while TPGS_IMPLICIT_ALUA is disabled\n");
1998                 return -EINVAL;
1999         }
2000         if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2001             new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2002                 /* LBA DEPENDENT is only allowed with implicit ALUA */
2003                 pr_err("Unable to process implicit configfs ALUA transition"
2004                        " while explicit ALUA management is enabled\n");
2005                 return -EINVAL;
2006         }
2007
2008         ret = core_alua_do_port_transition(tg_pt_gp, dev,
2009                                         NULL, NULL, new_state, 0);
2010         return (!ret) ? count : -EINVAL;
2011 }
2012
2013 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2014
2015 /*
2016  * alua_access_status
2017  */
2018 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2019         struct t10_alua_tg_pt_gp *tg_pt_gp,
2020         char *page)
2021 {
2022         return sprintf(page, "%s\n",
2023                 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2024 }
2025
2026 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2027         struct t10_alua_tg_pt_gp *tg_pt_gp,
2028         const char *page,
2029         size_t count)
2030 {
2031         unsigned long tmp;
2032         int new_status, ret;
2033
2034         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2035                 pr_err("Unable to do set ALUA access status on non"
2036                         " valid tg_pt_gp ID: %hu\n",
2037                         tg_pt_gp->tg_pt_gp_valid_id);
2038                 return -EINVAL;
2039         }
2040
2041         ret = kstrtoul(page, 0, &tmp);
2042         if (ret < 0) {
2043                 pr_err("Unable to extract new ALUA access status"
2044                                 " from %s\n", page);
2045                 return ret;
2046         }
2047         new_status = (int)tmp;
2048
2049         if ((new_status != ALUA_STATUS_NONE) &&
2050             (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2051             (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2052                 pr_err("Illegal ALUA access status: 0x%02x\n",
2053                                 new_status);
2054                 return -EINVAL;
2055         }
2056
2057         tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2058         return count;
2059 }
2060
2061 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2062
2063 /*
2064  * alua_access_type
2065  */
2066 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2067         struct t10_alua_tg_pt_gp *tg_pt_gp,
2068         char *page)
2069 {
2070         return core_alua_show_access_type(tg_pt_gp, page);
2071 }
2072
2073 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2074         struct t10_alua_tg_pt_gp *tg_pt_gp,
2075         const char *page,
2076         size_t count)
2077 {
2078         return core_alua_store_access_type(tg_pt_gp, page, count);
2079 }
2080
2081 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2082
2083 /*
2084  * alua_supported_states
2085  */
2086
2087 #define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit)               \
2088 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \
2089         struct t10_alua_tg_pt_gp *t, char *p)                           \
2090 {                                                                       \
2091         return sprintf(p, "%d\n", !!(t->_var & _bit));                  \
2092 }
2093
2094 #define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit)              \
2095 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\
2096         struct t10_alua_tg_pt_gp *t, const char *p, size_t c)           \
2097 {                                                                       \
2098         unsigned long tmp;                                              \
2099         int ret;                                                        \
2100                                                                         \
2101         if (!t->tg_pt_gp_valid_id) {                                    \
2102                 pr_err("Unable to do set ##_name ALUA state on non"     \
2103                        " valid tg_pt_gp ID: %hu\n",                     \
2104                        t->tg_pt_gp_valid_id);                           \
2105                 return -EINVAL;                                         \
2106         }                                                               \
2107                                                                         \
2108         ret = kstrtoul(p, 0, &tmp);                                     \
2109         if (ret < 0) {                                                  \
2110                 pr_err("Invalid value '%s', must be '0' or '1'\n", p);  \
2111                 return -EINVAL;                                         \
2112         }                                                               \
2113         if (tmp > 1) {                                                  \
2114                 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2115                 return -EINVAL;                                         \
2116         }                                                               \
2117         if (tmp)                                                        \
2118                 t->_var |= _bit;                                        \
2119         else                                                            \
2120                 t->_var &= ~_bit;                                       \
2121                                                                         \
2122         return c;                                                       \
2123 }
2124
2125 SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning,
2126                                tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2127 SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning,
2128                                 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2129 SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR);
2130
2131 SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline,
2132                                tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2133 SE_DEV_ALUA_SUPPORT_STATE_STORE(offline,
2134                                 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2135 SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR);
2136
2137 SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent,
2138                                tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2139 SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent,
2140                                 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2141 SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO);
2142
2143 SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable,
2144                                tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2145 SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable,
2146                                 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2147 SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR);
2148
2149 SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby,
2150                                tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2151 SE_DEV_ALUA_SUPPORT_STATE_STORE(standby,
2152                                 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2153 SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR);
2154
2155 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized,
2156                                tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2157 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized,
2158                                 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2159 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR);
2160
2161 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized,
2162                                tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2163 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized,
2164                                 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2165 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR);
2166
2167 /*
2168  * alua_write_metadata
2169  */
2170 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2171         struct t10_alua_tg_pt_gp *tg_pt_gp,
2172         char *page)
2173 {
2174         return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2175 }
2176
2177 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2178         struct t10_alua_tg_pt_gp *tg_pt_gp,
2179         const char *page,
2180         size_t count)
2181 {
2182         unsigned long tmp;
2183         int ret;
2184
2185         ret = kstrtoul(page, 0, &tmp);
2186         if (ret < 0) {
2187                 pr_err("Unable to extract alua_write_metadata\n");
2188                 return ret;
2189         }
2190
2191         if ((tmp != 0) && (tmp != 1)) {
2192                 pr_err("Illegal value for alua_write_metadata:"
2193                         " %lu\n", tmp);
2194                 return -EINVAL;
2195         }
2196         tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2197
2198         return count;
2199 }
2200
2201 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2202
2203
2204
2205 /*
2206  * nonop_delay_msecs
2207  */
2208 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2209         struct t10_alua_tg_pt_gp *tg_pt_gp,
2210         char *page)
2211 {
2212         return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2213
2214 }
2215
2216 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2217         struct t10_alua_tg_pt_gp *tg_pt_gp,
2218         const char *page,
2219         size_t count)
2220 {
2221         return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2222 }
2223
2224 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2225
2226 /*
2227  * trans_delay_msecs
2228  */
2229 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2230         struct t10_alua_tg_pt_gp *tg_pt_gp,
2231         char *page)
2232 {
2233         return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2234 }
2235
2236 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2237         struct t10_alua_tg_pt_gp *tg_pt_gp,
2238         const char *page,
2239         size_t count)
2240 {
2241         return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2242 }
2243
2244 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2245
2246 /*
2247  * implicit_trans_secs
2248  */
2249 static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs(
2250         struct t10_alua_tg_pt_gp *tg_pt_gp,
2251         char *page)
2252 {
2253         return core_alua_show_implicit_trans_secs(tg_pt_gp, page);
2254 }
2255
2256 static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs(
2257         struct t10_alua_tg_pt_gp *tg_pt_gp,
2258         const char *page,
2259         size_t count)
2260 {
2261         return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count);
2262 }
2263
2264 SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR);
2265
2266 /*
2267  * preferred
2268  */
2269
2270 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2271         struct t10_alua_tg_pt_gp *tg_pt_gp,
2272         char *page)
2273 {
2274         return core_alua_show_preferred_bit(tg_pt_gp, page);
2275 }
2276
2277 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2278         struct t10_alua_tg_pt_gp *tg_pt_gp,
2279         const char *page,
2280         size_t count)
2281 {
2282         return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2283 }
2284
2285 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2286
2287 /*
2288  * tg_pt_gp_id
2289  */
2290 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2291         struct t10_alua_tg_pt_gp *tg_pt_gp,
2292         char *page)
2293 {
2294         if (!tg_pt_gp->tg_pt_gp_valid_id)
2295                 return 0;
2296
2297         return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2298 }
2299
2300 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2301         struct t10_alua_tg_pt_gp *tg_pt_gp,
2302         const char *page,
2303         size_t count)
2304 {
2305         struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2306         unsigned long tg_pt_gp_id;
2307         int ret;
2308
2309         ret = kstrtoul(page, 0, &tg_pt_gp_id);
2310         if (ret < 0) {
2311                 pr_err("kstrtoul() returned %d for"
2312                         " tg_pt_gp_id\n", ret);
2313                 return ret;
2314         }
2315         if (tg_pt_gp_id > 0x0000ffff) {
2316                 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2317                         " 0x0000ffff\n", tg_pt_gp_id);
2318                 return -EINVAL;
2319         }
2320
2321         ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2322         if (ret < 0)
2323                 return -EINVAL;
2324
2325         pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2326                 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2327                 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2328                 tg_pt_gp->tg_pt_gp_id);
2329
2330         return count;
2331 }
2332
2333 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2334
2335 /*
2336  * members
2337  */
2338 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2339         struct t10_alua_tg_pt_gp *tg_pt_gp,
2340         char *page)
2341 {
2342         struct se_port *port;
2343         struct se_portal_group *tpg;
2344         struct se_lun *lun;
2345         struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2346         ssize_t len = 0, cur_len;
2347         unsigned char buf[TG_PT_GROUP_NAME_BUF];
2348
2349         memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2350
2351         spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2352         list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2353                         tg_pt_gp_mem_list) {
2354                 port = tg_pt_gp_mem->tg_pt;
2355                 tpg = port->sep_tpg;
2356                 lun = port->sep_lun;
2357
2358                 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2359                         "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2360                         tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2361                         tpg->se_tpg_tfo->tpg_get_tag(tpg),
2362                         config_item_name(&lun->lun_group.cg_item));
2363                 cur_len++; /* Extra byte for NULL terminator */
2364
2365                 if ((cur_len + len) > PAGE_SIZE) {
2366                         pr_warn("Ran out of lu_gp_show_attr"
2367                                 "_members buffer\n");
2368                         break;
2369                 }
2370                 memcpy(page+len, buf, cur_len);
2371                 len += cur_len;
2372         }
2373         spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2374
2375         return len;
2376 }
2377
2378 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2379
2380 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2381                         tg_pt_gp_group);
2382
2383 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2384         &target_core_alua_tg_pt_gp_alua_access_state.attr,
2385         &target_core_alua_tg_pt_gp_alua_access_status.attr,
2386         &target_core_alua_tg_pt_gp_alua_access_type.attr,
2387         &target_core_alua_tg_pt_gp_alua_support_transitioning.attr,
2388         &target_core_alua_tg_pt_gp_alua_support_offline.attr,
2389         &target_core_alua_tg_pt_gp_alua_support_lba_dependent.attr,
2390         &target_core_alua_tg_pt_gp_alua_support_unavailable.attr,
2391         &target_core_alua_tg_pt_gp_alua_support_standby.attr,
2392         &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized.attr,
2393         &target_core_alua_tg_pt_gp_alua_support_active_optimized.attr,
2394         &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2395         &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2396         &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2397         &target_core_alua_tg_pt_gp_implicit_trans_secs.attr,
2398         &target_core_alua_tg_pt_gp_preferred.attr,
2399         &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2400         &target_core_alua_tg_pt_gp_members.attr,
2401         NULL,
2402 };
2403
2404 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2405 {
2406         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2407                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2408
2409         core_alua_free_tg_pt_gp(tg_pt_gp);
2410 }
2411
2412 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2413         .release                = target_core_alua_tg_pt_gp_release,
2414         .show_attribute         = target_core_alua_tg_pt_gp_attr_show,
2415         .store_attribute        = target_core_alua_tg_pt_gp_attr_store,
2416 };
2417
2418 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2419         .ct_item_ops            = &target_core_alua_tg_pt_gp_ops,
2420         .ct_attrs               = target_core_alua_tg_pt_gp_attrs,
2421         .ct_owner               = THIS_MODULE,
2422 };
2423
2424 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2425
2426 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2427
2428 static struct config_group *target_core_alua_create_tg_pt_gp(
2429         struct config_group *group,
2430         const char *name)
2431 {
2432         struct t10_alua *alua = container_of(group, struct t10_alua,
2433                                         alua_tg_pt_gps_group);
2434         struct t10_alua_tg_pt_gp *tg_pt_gp;
2435         struct config_group *alua_tg_pt_gp_cg = NULL;
2436         struct config_item *alua_tg_pt_gp_ci = NULL;
2437
2438         tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2439         if (!tg_pt_gp)
2440                 return NULL;
2441
2442         alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2443         alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2444
2445         config_group_init_type_name(alua_tg_pt_gp_cg, name,
2446                         &target_core_alua_tg_pt_gp_cit);
2447
2448         pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2449                 " Group: alua/tg_pt_gps/%s\n",
2450                 config_item_name(alua_tg_pt_gp_ci));
2451
2452         return alua_tg_pt_gp_cg;
2453 }
2454
2455 static void target_core_alua_drop_tg_pt_gp(
2456         struct config_group *group,
2457         struct config_item *item)
2458 {
2459         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2460                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2461
2462         pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2463                 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2464                 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2465         /*
2466          * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2467          * -> target_core_alua_tg_pt_gp_release().
2468          */
2469         config_item_put(item);
2470 }
2471
2472 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2473         .make_group             = &target_core_alua_create_tg_pt_gp,
2474         .drop_item              = &target_core_alua_drop_tg_pt_gp,
2475 };
2476
2477 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
2478
2479 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2480
2481 /* Start functions for struct config_item_type target_core_alua_cit */
2482
2483 /*
2484  * target_core_alua_cit is a ConfigFS group that lives under
2485  * /sys/kernel/config/target/core/alua.  There are default groups
2486  * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2487  * target_core_alua_cit in target_core_init_configfs() below.
2488  */
2489 static struct config_item_type target_core_alua_cit = {
2490         .ct_item_ops            = NULL,
2491         .ct_attrs               = NULL,
2492         .ct_owner               = THIS_MODULE,
2493 };
2494
2495 /* End functions for struct config_item_type target_core_alua_cit */
2496
2497 /* Start functions for struct config_item_type tb_dev_stat_cit */
2498
2499 static struct config_group *target_core_stat_mkdir(
2500         struct config_group *group,
2501         const char *name)
2502 {
2503         return ERR_PTR(-ENOSYS);
2504 }
2505
2506 static void target_core_stat_rmdir(
2507         struct config_group *group,
2508         struct config_item *item)
2509 {
2510         return;
2511 }
2512
2513 static struct configfs_group_operations target_core_stat_group_ops = {
2514         .make_group             = &target_core_stat_mkdir,
2515         .drop_item              = &target_core_stat_rmdir,
2516 };
2517
2518 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
2519
2520 /* End functions for struct config_item_type tb_dev_stat_cit */
2521
2522 /* Start functions for struct config_item_type target_core_hba_cit */
2523
2524 static struct config_group *target_core_make_subdev(
2525         struct config_group *group,
2526         const char *name)
2527 {
2528         struct t10_alua_tg_pt_gp *tg_pt_gp;
2529         struct se_subsystem_api *t;
2530         struct config_item *hba_ci = &group->cg_item;
2531         struct se_hba *hba = item_to_hba(hba_ci);
2532         struct se_device *dev;
2533         struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2534         struct config_group *dev_stat_grp = NULL;
2535         int errno = -ENOMEM, ret;
2536
2537         ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2538         if (ret)
2539                 return ERR_PTR(ret);
2540         /*
2541          * Locate the struct se_subsystem_api from parent's struct se_hba.
2542          */
2543         t = hba->transport;
2544
2545         dev = target_alloc_device(hba, name);
2546         if (!dev)
2547                 goto out_unlock;
2548
2549         dev_cg = &dev->dev_group;
2550
2551         dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
2552                         GFP_KERNEL);
2553         if (!dev_cg->default_groups)
2554                 goto out_free_device;
2555
2556         config_group_init_type_name(dev_cg, name, &t->tb_cits.tb_dev_cit);
2557         config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2558                         &t->tb_cits.tb_dev_attrib_cit);
2559         config_group_init_type_name(&dev->dev_pr_group, "pr",
2560                         &t->tb_cits.tb_dev_pr_cit);
2561         config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2562                         &t->tb_cits.tb_dev_wwn_cit);
2563         config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2564                         "alua", &t->tb_cits.tb_dev_alua_tg_pt_gps_cit);
2565         config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2566                         "statistics", &t->tb_cits.tb_dev_stat_cit);
2567
2568         dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
2569         dev_cg->default_groups[1] = &dev->dev_pr_group;
2570         dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
2571         dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
2572         dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
2573         dev_cg->default_groups[5] = NULL;
2574         /*
2575          * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2576          */
2577         tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2578         if (!tg_pt_gp)
2579                 goto out_free_dev_cg_default_groups;
2580         dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2581
2582         tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2583         tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2584                                 GFP_KERNEL);
2585         if (!tg_pt_gp_cg->default_groups) {
2586                 pr_err("Unable to allocate tg_pt_gp_cg->"
2587                                 "default_groups\n");
2588                 goto out_free_tg_pt_gp;
2589         }
2590
2591         config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2592                         "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2593         tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2594         tg_pt_gp_cg->default_groups[1] = NULL;
2595         /*
2596          * Add core/$HBA/$DEV/statistics/ default groups
2597          */
2598         dev_stat_grp = &dev->dev_stat_grps.stat_group;
2599         dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
2600                                 GFP_KERNEL);
2601         if (!dev_stat_grp->default_groups) {
2602                 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2603                 goto out_free_tg_pt_gp_cg_default_groups;
2604         }
2605         target_stat_setup_dev_default_groups(dev);
2606
2607         mutex_unlock(&hba->hba_access_mutex);
2608         return dev_cg;
2609
2610 out_free_tg_pt_gp_cg_default_groups:
2611         kfree(tg_pt_gp_cg->default_groups);
2612 out_free_tg_pt_gp:
2613         core_alua_free_tg_pt_gp(tg_pt_gp);
2614 out_free_dev_cg_default_groups:
2615         kfree(dev_cg->default_groups);
2616 out_free_device:
2617         target_free_device(dev);
2618 out_unlock:
2619         mutex_unlock(&hba->hba_access_mutex);
2620         return ERR_PTR(errno);
2621 }
2622
2623 static void target_core_drop_subdev(
2624         struct config_group *group,
2625         struct config_item *item)
2626 {
2627         struct config_group *dev_cg = to_config_group(item);
2628         struct se_device *dev =
2629                 container_of(dev_cg, struct se_device, dev_group);
2630         struct se_hba *hba;
2631         struct config_item *df_item;
2632         struct config_group *tg_pt_gp_cg, *dev_stat_grp;
2633         int i;
2634
2635         hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
2636
2637         mutex_lock(&hba->hba_access_mutex);
2638
2639         dev_stat_grp = &dev->dev_stat_grps.stat_group;
2640         for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2641                 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2642                 dev_stat_grp->default_groups[i] = NULL;
2643                 config_item_put(df_item);
2644         }
2645         kfree(dev_stat_grp->default_groups);
2646
2647         tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2648         for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2649                 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2650                 tg_pt_gp_cg->default_groups[i] = NULL;
2651                 config_item_put(df_item);
2652         }
2653         kfree(tg_pt_gp_cg->default_groups);
2654         /*
2655          * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2656          * directly from target_core_alua_tg_pt_gp_release().
2657          */
2658         dev->t10_alua.default_tg_pt_gp = NULL;
2659
2660         for (i = 0; dev_cg->default_groups[i]; i++) {
2661                 df_item = &dev_cg->default_groups[i]->cg_item;
2662                 dev_cg->default_groups[i] = NULL;
2663                 config_item_put(df_item);
2664         }
2665         /*
2666          * se_dev is released from target_core_dev_item_ops->release()
2667          */
2668         config_item_put(item);
2669         mutex_unlock(&hba->hba_access_mutex);
2670 }
2671
2672 static struct configfs_group_operations target_core_hba_group_ops = {
2673         .make_group             = target_core_make_subdev,
2674         .drop_item              = target_core_drop_subdev,
2675 };
2676
2677 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2678 #define SE_HBA_ATTR(_name, _mode)                               \
2679 static struct target_core_hba_attribute                         \
2680                 target_core_hba_##_name =                       \
2681                 __CONFIGFS_EATTR(_name, _mode,                  \
2682                 target_core_hba_show_attr_##_name,              \
2683                 target_core_hba_store_attr_##_name);
2684
2685 #define SE_HBA_ATTR_RO(_name)                                   \
2686 static struct target_core_hba_attribute                         \
2687                 target_core_hba_##_name =                       \
2688                 __CONFIGFS_EATTR_RO(_name,                      \
2689                 target_core_hba_show_attr_##_name);
2690
2691 static ssize_t target_core_hba_show_attr_hba_info(
2692         struct se_hba *hba,
2693         char *page)
2694 {
2695         return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2696                         hba->hba_id, hba->transport->name,
2697                         TARGET_CORE_CONFIGFS_VERSION);
2698 }
2699
2700 SE_HBA_ATTR_RO(hba_info);
2701
2702 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2703                                 char *page)
2704 {
2705         int hba_mode = 0;
2706
2707         if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2708                 hba_mode = 1;
2709
2710         return sprintf(page, "%d\n", hba_mode);
2711 }
2712
2713 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2714                                 const char *page, size_t count)
2715 {
2716         struct se_subsystem_api *transport = hba->transport;
2717         unsigned long mode_flag;
2718         int ret;
2719
2720         if (transport->pmode_enable_hba == NULL)
2721                 return -EINVAL;
2722
2723         ret = kstrtoul(page, 0, &mode_flag);
2724         if (ret < 0) {
2725                 pr_err("Unable to extract hba mode flag: %d\n", ret);
2726                 return ret;
2727         }
2728
2729         if (hba->dev_count) {
2730                 pr_err("Unable to set hba_mode with active devices\n");
2731                 return -EINVAL;
2732         }
2733
2734         ret = transport->pmode_enable_hba(hba, mode_flag);
2735         if (ret < 0)
2736                 return -EINVAL;
2737         if (ret > 0)
2738                 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2739         else if (ret == 0)
2740                 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2741
2742         return count;
2743 }
2744
2745 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2746
2747 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2748
2749 static void target_core_hba_release(struct config_item *item)
2750 {
2751         struct se_hba *hba = container_of(to_config_group(item),
2752                                 struct se_hba, hba_group);
2753         core_delete_hba(hba);
2754 }
2755
2756 static struct configfs_attribute *target_core_hba_attrs[] = {
2757         &target_core_hba_hba_info.attr,
2758         &target_core_hba_hba_mode.attr,
2759         NULL,
2760 };
2761
2762 static struct configfs_item_operations target_core_hba_item_ops = {
2763         .release                = target_core_hba_release,
2764         .show_attribute         = target_core_hba_attr_show,
2765         .store_attribute        = target_core_hba_attr_store,
2766 };
2767
2768 static struct config_item_type target_core_hba_cit = {
2769         .ct_item_ops            = &target_core_hba_item_ops,
2770         .ct_group_ops           = &target_core_hba_group_ops,
2771         .ct_attrs               = target_core_hba_attrs,
2772         .ct_owner               = THIS_MODULE,
2773 };
2774
2775 static struct config_group *target_core_call_addhbatotarget(
2776         struct config_group *group,
2777         const char *name)
2778 {
2779         char *se_plugin_str, *str, *str2;
2780         struct se_hba *hba;
2781         char buf[TARGET_CORE_NAME_MAX_LEN];
2782         unsigned long plugin_dep_id = 0;
2783         int ret;
2784
2785         memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
2786         if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
2787                 pr_err("Passed *name strlen(): %d exceeds"
2788                         " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
2789                         TARGET_CORE_NAME_MAX_LEN);
2790                 return ERR_PTR(-ENAMETOOLONG);
2791         }
2792         snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
2793
2794         str = strstr(buf, "_");
2795         if (!str) {
2796                 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
2797                 return ERR_PTR(-EINVAL);
2798         }
2799         se_plugin_str = buf;
2800         /*
2801          * Special case for subsystem plugins that have "_" in their names.
2802          * Namely rd_direct and rd_mcp..
2803          */
2804         str2 = strstr(str+1, "_");
2805         if (str2) {
2806                 *str2 = '\0'; /* Terminate for *se_plugin_str */
2807                 str2++; /* Skip to start of plugin dependent ID */
2808                 str = str2;
2809         } else {
2810                 *str = '\0'; /* Terminate for *se_plugin_str */
2811                 str++; /* Skip to start of plugin dependent ID */
2812         }
2813
2814         ret = kstrtoul(str, 0, &plugin_dep_id);
2815         if (ret < 0) {
2816                 pr_err("kstrtoul() returned %d for"
2817                                 " plugin_dep_id\n", ret);
2818                 return ERR_PTR(ret);
2819         }
2820         /*
2821          * Load up TCM subsystem plugins if they have not already been loaded.
2822          */
2823         transport_subsystem_check_init();
2824
2825         hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
2826         if (IS_ERR(hba))
2827                 return ERR_CAST(hba);
2828
2829         config_group_init_type_name(&hba->hba_group, name,
2830                         &target_core_hba_cit);
2831
2832         return &hba->hba_group;
2833 }
2834
2835 static void target_core_call_delhbafromtarget(
2836         struct config_group *group,
2837         struct config_item *item)
2838 {
2839         /*
2840          * core_delete_hba() is called from target_core_hba_item_ops->release()
2841          * -> target_core_hba_release()
2842          */
2843         config_item_put(item);
2844 }
2845
2846 static struct configfs_group_operations target_core_group_ops = {
2847         .make_group     = target_core_call_addhbatotarget,
2848         .drop_item      = target_core_call_delhbafromtarget,
2849 };
2850
2851 static struct config_item_type target_core_cit = {
2852         .ct_item_ops    = NULL,
2853         .ct_group_ops   = &target_core_group_ops,
2854         .ct_attrs       = NULL,
2855         .ct_owner       = THIS_MODULE,
2856 };
2857
2858 /* Stop functions for struct config_item_type target_core_hba_cit */
2859
2860 void target_core_setup_sub_cits(struct se_subsystem_api *sa)
2861 {
2862         target_core_setup_dev_cit(sa);
2863         target_core_setup_dev_attrib_cit(sa);
2864         target_core_setup_dev_pr_cit(sa);
2865         target_core_setup_dev_wwn_cit(sa);
2866         target_core_setup_dev_alua_tg_pt_gps_cit(sa);
2867         target_core_setup_dev_stat_cit(sa);
2868 }
2869 EXPORT_SYMBOL(target_core_setup_sub_cits);
2870
2871 static int __init target_core_init_configfs(void)
2872 {
2873         struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
2874         struct config_group *lu_gp_cg = NULL;
2875         struct configfs_subsystem *subsys = &target_core_fabrics;
2876         struct t10_alua_lu_gp *lu_gp;
2877         int ret;
2878
2879         pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
2880                 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
2881                 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
2882
2883         config_group_init(&subsys->su_group);
2884         mutex_init(&subsys->su_mutex);
2885
2886         ret = init_se_kmem_caches();
2887         if (ret < 0)
2888                 return ret;
2889         /*
2890          * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
2891          * and ALUA Logical Unit Group and Target Port Group infrastructure.
2892          */
2893         target_cg = &subsys->su_group;
2894         target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2895                                 GFP_KERNEL);
2896         if (!target_cg->default_groups) {
2897                 pr_err("Unable to allocate target_cg->default_groups\n");
2898                 ret = -ENOMEM;
2899                 goto out_global;
2900         }
2901
2902         config_group_init_type_name(&target_core_hbagroup,
2903                         "core", &target_core_cit);
2904         target_cg->default_groups[0] = &target_core_hbagroup;
2905         target_cg->default_groups[1] = NULL;
2906         /*
2907          * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
2908          */
2909         hba_cg = &target_core_hbagroup;
2910         hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2911                                 GFP_KERNEL);
2912         if (!hba_cg->default_groups) {
2913                 pr_err("Unable to allocate hba_cg->default_groups\n");
2914                 ret = -ENOMEM;
2915                 goto out_global;
2916         }
2917         config_group_init_type_name(&alua_group,
2918                         "alua", &target_core_alua_cit);
2919         hba_cg->default_groups[0] = &alua_group;
2920         hba_cg->default_groups[1] = NULL;
2921         /*
2922          * Add ALUA Logical Unit Group and Target Port Group ConfigFS
2923          * groups under /sys/kernel/config/target/core/alua/
2924          */
2925         alua_cg = &alua_group;
2926         alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2927                         GFP_KERNEL);
2928         if (!alua_cg->default_groups) {
2929                 pr_err("Unable to allocate alua_cg->default_groups\n");
2930                 ret = -ENOMEM;
2931                 goto out_global;
2932         }
2933
2934         config_group_init_type_name(&alua_lu_gps_group,
2935                         "lu_gps", &target_core_alua_lu_gps_cit);
2936         alua_cg->default_groups[0] = &alua_lu_gps_group;
2937         alua_cg->default_groups[1] = NULL;
2938         /*
2939          * Add core/alua/lu_gps/default_lu_gp
2940          */
2941         lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
2942         if (IS_ERR(lu_gp)) {
2943                 ret = -ENOMEM;
2944                 goto out_global;
2945         }
2946
2947         lu_gp_cg = &alua_lu_gps_group;
2948         lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2949                         GFP_KERNEL);
2950         if (!lu_gp_cg->default_groups) {
2951                 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
2952                 ret = -ENOMEM;
2953                 goto out_global;
2954         }
2955
2956         config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
2957                                 &target_core_alua_lu_gp_cit);
2958         lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
2959         lu_gp_cg->default_groups[1] = NULL;
2960         default_lu_gp = lu_gp;
2961         /*
2962          * Register the target_core_mod subsystem with configfs.
2963          */
2964         ret = configfs_register_subsystem(subsys);
2965         if (ret < 0) {
2966                 pr_err("Error %d while registering subsystem %s\n",
2967                         ret, subsys->su_group.cg_item.ci_namebuf);
2968                 goto out_global;
2969         }
2970         pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
2971                 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
2972                 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
2973         /*
2974          * Register built-in RAMDISK subsystem logic for virtual LUN 0
2975          */
2976         ret = rd_module_init();
2977         if (ret < 0)
2978                 goto out;
2979
2980         ret = core_dev_setup_virtual_lun0();
2981         if (ret < 0)
2982                 goto out;
2983
2984         ret = target_xcopy_setup_pt();
2985         if (ret < 0)
2986                 goto out;
2987
2988         return 0;
2989
2990 out:
2991         configfs_unregister_subsystem(subsys);
2992         core_dev_release_virtual_lun0();
2993         rd_module_exit();
2994 out_global:
2995         if (default_lu_gp) {
2996                 core_alua_free_lu_gp(default_lu_gp);
2997                 default_lu_gp = NULL;
2998         }
2999         if (lu_gp_cg)
3000                 kfree(lu_gp_cg->default_groups);
3001         if (alua_cg)
3002                 kfree(alua_cg->default_groups);
3003         if (hba_cg)
3004                 kfree(hba_cg->default_groups);
3005         kfree(target_cg->default_groups);
3006         release_se_kmem_caches();
3007         return ret;
3008 }
3009
3010 static void __exit target_core_exit_configfs(void)
3011 {
3012         struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3013         struct config_item *item;
3014         int i;
3015
3016         lu_gp_cg = &alua_lu_gps_group;
3017         for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3018                 item = &lu_gp_cg->default_groups[i]->cg_item;
3019                 lu_gp_cg->default_groups[i] = NULL;
3020                 config_item_put(item);
3021         }
3022         kfree(lu_gp_cg->default_groups);
3023         lu_gp_cg->default_groups = NULL;
3024
3025         alua_cg = &alua_group;
3026         for (i = 0; alua_cg->default_groups[i]; i++) {
3027                 item = &alua_cg->default_groups[i]->cg_item;
3028                 alua_cg->default_groups[i] = NULL;
3029                 config_item_put(item);
3030         }
3031         kfree(alua_cg->default_groups);
3032         alua_cg->default_groups = NULL;
3033
3034         hba_cg = &target_core_hbagroup;
3035         for (i = 0; hba_cg->default_groups[i]; i++) {
3036                 item = &hba_cg->default_groups[i]->cg_item;
3037                 hba_cg->default_groups[i] = NULL;
3038                 config_item_put(item);
3039         }
3040         kfree(hba_cg->default_groups);
3041         hba_cg->default_groups = NULL;
3042         /*
3043          * We expect subsys->su_group.default_groups to be released
3044          * by configfs subsystem provider logic..
3045          */
3046         configfs_unregister_subsystem(&target_core_fabrics);
3047         kfree(target_core_fabrics.su_group.default_groups);
3048
3049         core_alua_free_lu_gp(default_lu_gp);
3050         default_lu_gp = NULL;
3051
3052         pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3053                         " Infrastructure\n");
3054
3055         core_dev_release_virtual_lun0();
3056         rd_module_exit();
3057         target_xcopy_release_pt();
3058         release_se_kmem_caches();
3059 }
3060
3061 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3062 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3063 MODULE_LICENSE("GPL");
3064
3065 module_init(target_core_init_configfs);
3066 module_exit(target_core_exit_configfs);