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         /*
 216          * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
 217          */
 218         tf->tf_ops.tf_subsys = tf->tf_subsys;
 219         tf->tf_fabric = &tf->tf_group.cg_item;
 220         pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
 221                         " for %s\n", name);
 222
 223         return &tf->tf_group;
 224 }
 225
 226 /*
 227  * Called from struct target_core_group_ops->drop_item()
 228  */
 229 static void target_core_deregister_fabric(
 230         struct config_group *group,
 231         struct config_item *item)
 232 {
 233         struct target_fabric_configfs *tf = container_of(
 234                 to_config_group(item), struct target_fabric_configfs, tf_group);
 235         struct config_group *tf_group;
 236         struct config_item *df_item;
 237         int i;
 238
 239         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
 240                 " tf list\n", config_item_name(item));
 241
 242         pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
 243                         " %s\n", tf->tf_name);
 244         atomic_dec(&tf->tf_access_cnt);
 245
 246         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
 247                         " tf->tf_fabric for %s\n", tf->tf_name);
 248         tf->tf_fabric = NULL;
 249
 250         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
 251                         " %s\n", config_item_name(item));
 252
 253         tf_group = &tf->tf_group;
 254         for (i = 0; tf_group->default_groups[i]; i++) {
 255                 df_item = &tf_group->default_groups[i]->cg_item;
 256                 tf_group->default_groups[i] = NULL;
 257                 config_item_put(df_item);
 258         }
 259         config_item_put(item);
 260 }
 261
 262 static struct configfs_group_operations target_core_fabric_group_ops = {
 263         .make_group     = &target_core_register_fabric,
 264         .drop_item      = &target_core_deregister_fabric,
 265 };
 266
 267 /*
 268  * All item attributes appearing in /sys/kernel/target/ appear here.
 269  */
 270 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
 271         &target_core_item_attr_version,
 272         NULL,
 273 };
 274
 275 /*
 276  * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
 277  */
 278 static struct config_item_type target_core_fabrics_item = {
 279         .ct_item_ops    = &target_core_fabric_item_ops,
 280         .ct_group_ops   = &target_core_fabric_group_ops,
 281         .ct_attrs       = target_core_fabric_item_attrs,
 282         .ct_owner       = THIS_MODULE,
 283 };
 284
 285 static struct configfs_subsystem target_core_fabrics = {
 286         .su_group = {
 287                 .cg_item = {
 288                         .ci_namebuf = "target",
 289                         .ci_type = &target_core_fabrics_item,
 290                 },
 291         },
 292 };
 293
 294 struct configfs_subsystem *target_core_subsystem[] = {
 295         &target_core_fabrics,
 296         NULL,
 297 };
 298
 299 /*##############################################################################
 300 // Start functions called by external Target Fabrics Modules
 301 //############################################################################*/
 302
 303 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
 304 {
 305         if (!tfo->name) {
 306                 pr_err("Missing tfo->name\n");
 307                 return -EINVAL;
 308         }
 309         if (strlen(tfo->name) >= TARGET_FABRIC_NAME_SIZE) {
 310                 pr_err("Passed name: %s exceeds TARGET_FABRIC"
 311                         "_NAME_SIZE\n", tfo->name);
 312                 return -EINVAL;
 313         }
 314         if (!tfo->get_fabric_name) {
 315                 pr_err("Missing tfo->get_fabric_name()\n");
 316                 return -EINVAL;
 317         }
 318         if (!tfo->get_fabric_proto_ident) {
 319                 pr_err("Missing tfo->get_fabric_proto_ident()\n");
 320                 return -EINVAL;
 321         }
 322         if (!tfo->tpg_get_wwn) {
 323                 pr_err("Missing tfo->tpg_get_wwn()\n");
 324                 return -EINVAL;
 325         }
 326         if (!tfo->tpg_get_tag) {
 327                 pr_err("Missing tfo->tpg_get_tag()\n");
 328                 return -EINVAL;
 329         }
 330         if (!tfo->tpg_get_default_depth) {
 331                 pr_err("Missing tfo->tpg_get_default_depth()\n");
 332                 return -EINVAL;
 333         }
 334         if (!tfo->tpg_get_pr_transport_id) {
 335                 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
 336                 return -EINVAL;
 337         }
 338         if (!tfo->tpg_get_pr_transport_id_len) {
 339                 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
 340                 return -EINVAL;
 341         }
 342         if (!tfo->tpg_check_demo_mode) {
 343                 pr_err("Missing tfo->tpg_check_demo_mode()\n");
 344                 return -EINVAL;
 345         }
 346         if (!tfo->tpg_check_demo_mode_cache) {
 347                 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
 348                 return -EINVAL;
 349         }
 350         if (!tfo->tpg_check_demo_mode_write_protect) {
 351                 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
 352                 return -EINVAL;
 353         }
 354         if (!tfo->tpg_check_prod_mode_write_protect) {
 355                 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
 356                 return -EINVAL;
 357         }
 358         if (!tfo->tpg_alloc_fabric_acl) {
 359                 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
 360                 return -EINVAL;
 361         }
 362         if (!tfo->tpg_release_fabric_acl) {
 363                 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
 364                 return -EINVAL;
 365         }
 366         if (!tfo->tpg_get_inst_index) {
 367                 pr_err("Missing tfo->tpg_get_inst_index()\n");
 368                 return -EINVAL;
 369         }
 370         if (!tfo->release_cmd) {
 371                 pr_err("Missing tfo->release_cmd()\n");
 372                 return -EINVAL;
 373         }
 374         if (!tfo->shutdown_session) {
 375                 pr_err("Missing tfo->shutdown_session()\n");
 376                 return -EINVAL;
 377         }
 378         if (!tfo->close_session) {
 379                 pr_err("Missing tfo->close_session()\n");
 380                 return -EINVAL;
 381         }
 382         if (!tfo->sess_get_index) {
 383                 pr_err("Missing tfo->sess_get_index()\n");
 384                 return -EINVAL;
 385         }
 386         if (!tfo->write_pending) {
 387                 pr_err("Missing tfo->write_pending()\n");
 388                 return -EINVAL;
 389         }
 390         if (!tfo->write_pending_status) {
 391                 pr_err("Missing tfo->write_pending_status()\n");
 392                 return -EINVAL;
 393         }
 394         if (!tfo->set_default_node_attributes) {
 395                 pr_err("Missing tfo->set_default_node_attributes()\n");
 396                 return -EINVAL;
 397         }
 398         if (!tfo->get_task_tag) {
 399                 pr_err("Missing tfo->get_task_tag()\n");
 400                 return -EINVAL;
 401         }
 402         if (!tfo->get_cmd_state) {
 403                 pr_err("Missing tfo->get_cmd_state()\n");
 404                 return -EINVAL;
 405         }
 406         if (!tfo->queue_data_in) {
 407                 pr_err("Missing tfo->queue_data_in()\n");
 408                 return -EINVAL;
 409         }
 410         if (!tfo->queue_status) {
 411                 pr_err("Missing tfo->queue_status()\n");
 412                 return -EINVAL;
 413         }
 414         if (!tfo->queue_tm_rsp) {
 415                 pr_err("Missing tfo->queue_tm_rsp()\n");
 416                 return -EINVAL;
 417         }
 418         if (!tfo->aborted_task) {
 419                 pr_err("Missing tfo->aborted_task()\n");
 420                 return -EINVAL;
 421         }
 422         /*
 423          * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
 424          * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
 425          * target_core_fabric_configfs.c WWN+TPG group context code.
 426          */
 427         if (!tfo->fabric_make_wwn) {
 428                 pr_err("Missing tfo->fabric_make_wwn()\n");
 429                 return -EINVAL;
 430         }
 431         if (!tfo->fabric_drop_wwn) {
 432                 pr_err("Missing tfo->fabric_drop_wwn()\n");
 433                 return -EINVAL;
 434         }
 435         if (!tfo->fabric_make_tpg) {
 436                 pr_err("Missing tfo->fabric_make_tpg()\n");
 437                 return -EINVAL;
 438         }
 439         if (!tfo->fabric_drop_tpg) {
 440                 pr_err("Missing tfo->fabric_drop_tpg()\n");
 441                 return -EINVAL;
 442         }
 443
 444         return 0;
 445 }
 446
 447 int target_register_template(const struct target_core_fabric_ops *fo)
 448 {
 449         struct target_fabric_configfs *tf;
 450         int ret;
 451
 452         ret = target_fabric_tf_ops_check(fo);
 453         if (ret)
 454                 return ret;
 455
 456         tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
 457         if (!tf) {
 458                 pr_err("%s: could not allocate memory!\n", __func__);
 459                 return -ENOMEM;
 460         }
 461
 462         INIT_LIST_HEAD(&tf->tf_list);
 463         atomic_set(&tf->tf_access_cnt, 0);
 464
 465         /*
 466          * Setup the default generic struct config_item_type's (cits) in
 467          * struct target_fabric_configfs->tf_cit_tmpl
 468          */
 469         tf->tf_module = fo->module;
 470         tf->tf_subsys = target_core_subsystem[0];
 471         snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", fo->name);
 472
 473         tf->tf_ops = *fo;
 474         target_fabric_setup_cits(tf);
 475
 476         mutex_lock(&g_tf_lock);
 477         list_add_tail(&tf->tf_list, &g_tf_list);
 478         mutex_unlock(&g_tf_lock);
 479
 480         return 0;
 481 }
 482 EXPORT_SYMBOL(target_register_template);
 483
 484 void target_unregister_template(const struct target_core_fabric_ops *fo)
 485 {
 486         struct target_fabric_configfs *t;
 487
 488         mutex_lock(&g_tf_lock);
 489         list_for_each_entry(t, &g_tf_list, tf_list) {
 490                 if (!strcmp(t->tf_name, fo->name)) {
 491                         BUG_ON(atomic_read(&t->tf_access_cnt));
 492                         list_del(&t->tf_list);
 493                         kfree(t);
 494                         break;
 495                 }
 496         }
 497         mutex_unlock(&g_tf_lock);
 498 }
 499 EXPORT_SYMBOL(target_unregister_template);
 500
 501 /*##############################################################################
 502 // Stop functions called by external Target Fabrics Modules
 503 //############################################################################*/
 504
 505 /* Start functions for struct config_item_type tb_dev_attrib_cit */
 506
 507 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
 508 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
 509
 510 static struct configfs_item_operations target_core_dev_attrib_ops = {
 511         .show_attribute         = target_core_dev_attrib_attr_show,
 512         .store_attribute        = target_core_dev_attrib_attr_store,
 513 };
 514
 515 TB_CIT_SETUP(dev_attrib, &target_core_dev_attrib_ops, NULL, NULL);
 516
 517 /* End functions for struct config_item_type tb_dev_attrib_cit */
 518
 519 /*  Start functions for struct config_item_type tb_dev_wwn_cit */
 520
 521 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
 522 #define SE_DEV_WWN_ATTR(_name, _mode)                                   \
 523 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
 524                 __CONFIGFS_EATTR(_name, _mode,                          \
 525                 target_core_dev_wwn_show_attr_##_name,                  \
 526                 target_core_dev_wwn_store_attr_##_name);
 527
 528 #define SE_DEV_WWN_ATTR_RO(_name);                                      \
 529 do {                                                                    \
 530         static struct target_core_dev_wwn_attribute                     \
 531                         target_core_dev_wwn_##_name =                   \
 532                 __CONFIGFS_EATTR_RO(_name,                              \
 533                 target_core_dev_wwn_show_attr_##_name);                 \
 534 } while (0);
 535
 536 /*
 537  * VPD page 0x80 Unit serial
 538  */
 539 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
 540         struct t10_wwn *t10_wwn,
 541         char *page)
 542 {
 543         return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
 544                 &t10_wwn->unit_serial[0]);
 545 }
 546
 547 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
 548         struct t10_wwn *t10_wwn,
 549         const char *page,
 550         size_t count)
 551 {
 552         struct se_device *dev = t10_wwn->t10_dev;
 553         unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
 554
 555         /*
 556          * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
 557          * from the struct scsi_device level firmware, do not allow
 558          * VPD Unit Serial to be emulated.
 559          *
 560          * Note this struct scsi_device could also be emulating VPD
 561          * information from its drivers/scsi LLD.  But for now we assume
 562          * it is doing 'the right thing' wrt a world wide unique
 563          * VPD Unit Serial Number that OS dependent multipath can depend on.
 564          */
 565         if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
 566                 pr_err("Underlying SCSI device firmware provided VPD"
 567                         " Unit Serial, ignoring request\n");
 568                 return -EOPNOTSUPP;
 569         }
 570
 571         if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
 572                 pr_err("Emulated VPD Unit Serial exceeds"
 573                 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
 574                 return -EOVERFLOW;
 575         }
 576         /*
 577          * Check to see if any active $FABRIC_MOD exports exist.  If they
 578          * do exist, fail here as changing this information on the fly
 579          * (underneath the initiator side OS dependent multipath code)
 580          * could cause negative effects.
 581          */
 582         if (dev->export_count) {
 583                 pr_err("Unable to set VPD Unit Serial while"
 584                         " active %d $FABRIC_MOD exports exist\n",
 585                         dev->export_count);
 586                 return -EINVAL;
 587         }
 588
 589         /*
 590          * This currently assumes ASCII encoding for emulated VPD Unit Serial.
 591          *
 592          * Also, strip any newline added from the userspace
 593          * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
 594          */
 595         memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
 596         snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
 597         snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
 598                         "%s", strstrip(buf));
 599         dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
 600
 601         pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
 602                         " %s\n", dev->t10_wwn.unit_serial);
 603
 604         return count;
 605 }
 606
 607 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
 608
 609 /*
 610  * VPD page 0x83 Protocol Identifier
 611  */
 612 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
 613         struct t10_wwn *t10_wwn,
 614         char *page)
 615 {
 616         struct t10_vpd *vpd;
 617         unsigned char buf[VPD_TMP_BUF_SIZE];
 618         ssize_t len = 0;
 619
 620         memset(buf, 0, VPD_TMP_BUF_SIZE);
 621
 622         spin_lock(&t10_wwn->t10_vpd_lock);
 623         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
 624                 if (!vpd->protocol_identifier_set)
 625                         continue;
 626
 627                 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
 628
 629                 if (len + strlen(buf) >= PAGE_SIZE)
 630                         break;
 631
 632                 len += sprintf(page+len, "%s", buf);
 633         }
 634         spin_unlock(&t10_wwn->t10_vpd_lock);
 635
 636         return len;
 637 }
 638
 639 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
 640         struct t10_wwn *t10_wwn,
 641         const char *page,
 642         size_t count)
 643 {
 644         return -ENOSYS;
 645 }
 646
 647 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
 648
 649 /*
 650  * Generic wrapper for dumping VPD identifiers by association.
 651  */
 652 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc)                           \
 653 static ssize_t target_core_dev_wwn_show_attr_##_name(                   \
 654         struct t10_wwn *t10_wwn,                                        \
 655         char *page)                                                     \
 656 {                                                                       \
 657         struct t10_vpd *vpd;                                                    \
 658         unsigned char buf[VPD_TMP_BUF_SIZE];                            \
 659         ssize_t len = 0;                                                \
 660                                                                         \
 661         spin_lock(&t10_wwn->t10_vpd_lock);                              \
 662         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {    \
 663                 if (vpd->association != _assoc)                         \
 664                         continue;                                       \
 665                                                                         \
 666                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 667                 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE);   \
 668                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 669                         break;                                          \
 670                 len += sprintf(page+len, "%s", buf);                    \
 671                                                                         \
 672                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 673                 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
 674                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 675                         break;                                          \
 676                 len += sprintf(page+len, "%s", buf);                    \
 677                                                                         \
 678                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 679                 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
 680                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 681                         break;                                          \
 682                 len += sprintf(page+len, "%s", buf);                    \
 683         }                                                               \
 684         spin_unlock(&t10_wwn->t10_vpd_lock);                            \
 685                                                                         \
 686         return len;                                                     \
 687 }
 688
 689 /*
 690  * VPD page 0x83 Association: Logical Unit
 691  */
 692 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
 693
 694 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
 695         struct t10_wwn *t10_wwn,
 696         const char *page,
 697         size_t count)
 698 {
 699         return -ENOSYS;
 700 }
 701
 702 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
 703
 704 /*
 705  * VPD page 0x83 Association: Target Port
 706  */
 707 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
 708
 709 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
 710         struct t10_wwn *t10_wwn,
 711         const char *page,
 712         size_t count)
 713 {
 714         return -ENOSYS;
 715 }
 716
 717 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
 718
 719 /*
 720  * VPD page 0x83 Association: SCSI Target Device
 721  */
 722 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
 723
 724 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
 725         struct t10_wwn *t10_wwn,
 726         const char *page,
 727         size_t count)
 728 {
 729         return -ENOSYS;
 730 }
 731
 732 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
 733
 734 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
 735
 736 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
 737         &target_core_dev_wwn_vpd_unit_serial.attr,
 738         &target_core_dev_wwn_vpd_protocol_identifier.attr,
 739         &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
 740         &target_core_dev_wwn_vpd_assoc_target_port.attr,
 741         &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
 742         NULL,
 743 };
 744
 745 static struct configfs_item_operations target_core_dev_wwn_ops = {
 746         .show_attribute         = target_core_dev_wwn_attr_show,
 747         .store_attribute        = target_core_dev_wwn_attr_store,
 748 };
 749
 750 TB_CIT_SETUP(dev_wwn, &target_core_dev_wwn_ops, NULL, target_core_dev_wwn_attrs);
 751
 752 /*  End functions for struct config_item_type tb_dev_wwn_cit */
 753
 754 /*  Start functions for struct config_item_type tb_dev_pr_cit */
 755
 756 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
 757 #define SE_DEV_PR_ATTR(_name, _mode)                                    \
 758 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
 759         __CONFIGFS_EATTR(_name, _mode,                                  \
 760         target_core_dev_pr_show_attr_##_name,                           \
 761         target_core_dev_pr_store_attr_##_name);
 762
 763 #define SE_DEV_PR_ATTR_RO(_name);                                       \
 764 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
 765         __CONFIGFS_EATTR_RO(_name,                                      \
 766         target_core_dev_pr_show_attr_##_name);
 767
 768 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
 769                 char *page)
 770 {
 771         struct se_node_acl *se_nacl;
 772         struct t10_pr_registration *pr_reg;
 773         char i_buf[PR_REG_ISID_ID_LEN];
 774
 775         memset(i_buf, 0, PR_REG_ISID_ID_LEN);
 776
 777         pr_reg = dev->dev_pr_res_holder;
 778         if (!pr_reg)
 779                 return sprintf(page, "No SPC-3 Reservation holder\n");
 780
 781         se_nacl = pr_reg->pr_reg_nacl;
 782         core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
 783
 784         return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
 785                 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
 786                 se_nacl->initiatorname, i_buf);
 787 }
 788
 789 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
 790                 char *page)
 791 {
 792         struct se_node_acl *se_nacl;
 793         ssize_t len;
 794
 795         se_nacl = dev->dev_reserved_node_acl;
 796         if (se_nacl) {
 797                 len = sprintf(page,
 798                               "SPC-2 Reservation: %s Initiator: %s\n",
 799                               se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
 800                               se_nacl->initiatorname);
 801         } else {
 802                 len = sprintf(page, "No SPC-2 Reservation holder\n");
 803         }
 804         return len;
 805 }
 806
 807 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
 808                 char *page)
 809 {
 810         int ret;
 811
 812         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
 813                 return sprintf(page, "Passthrough\n");
 814
 815         spin_lock(&dev->dev_reservation_lock);
 816         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
 817                 ret = target_core_dev_pr_show_spc2_res(dev, page);
 818         else
 819                 ret = target_core_dev_pr_show_spc3_res(dev, page);
 820         spin_unlock(&dev->dev_reservation_lock);
 821         return ret;
 822 }
 823
 824 SE_DEV_PR_ATTR_RO(res_holder);
 825
 826 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
 827                 struct se_device *dev, char *page)
 828 {
 829         ssize_t len = 0;
 830
 831         spin_lock(&dev->dev_reservation_lock);
 832         if (!dev->dev_pr_res_holder) {
 833                 len = sprintf(page, "No SPC-3 Reservation holder\n");
 834         } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
 835                 len = sprintf(page, "SPC-3 Reservation: All Target"
 836                         " Ports registration\n");
 837         } else {
 838                 len = sprintf(page, "SPC-3 Reservation: Single"
 839                         " Target Port registration\n");
 840         }
 841
 842         spin_unlock(&dev->dev_reservation_lock);
 843         return len;
 844 }
 845
 846 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
 847
 848 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
 849                 struct se_device *dev, char *page)
 850 {
 851         return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
 852 }
 853
 854 SE_DEV_PR_ATTR_RO(res_pr_generation);
 855
 856 /*
 857  * res_pr_holder_tg_port
 858  */
 859 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
 860                 struct se_device *dev, char *page)
 861 {
 862         struct se_node_acl *se_nacl;
 863         struct se_lun *lun;
 864         struct se_portal_group *se_tpg;
 865         struct t10_pr_registration *pr_reg;
 866         const struct target_core_fabric_ops *tfo;
 867         ssize_t len = 0;
 868
 869         spin_lock(&dev->dev_reservation_lock);
 870         pr_reg = dev->dev_pr_res_holder;
 871         if (!pr_reg) {
 872                 len = sprintf(page, "No SPC-3 Reservation holder\n");
 873                 goto out_unlock;
 874         }
 875
 876         se_nacl = pr_reg->pr_reg_nacl;
 877         se_tpg = se_nacl->se_tpg;
 878         lun = pr_reg->pr_reg_tg_pt_lun;
 879         tfo = se_tpg->se_tpg_tfo;
 880
 881         len += sprintf(page+len, "SPC-3 Reservation: %s"
 882                 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
 883                 tfo->tpg_get_wwn(se_tpg));
 884         len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
 885                 " Identifier Tag: %hu %s Portal Group Tag: %hu"
 886                 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
 887                 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
 888                 tfo->get_fabric_name(), lun->unpacked_lun);
 889
 890 out_unlock:
 891         spin_unlock(&dev->dev_reservation_lock);
 892         return len;
 893 }
 894
 895 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
 896
 897 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
 898                 struct se_device *dev, char *page)
 899 {
 900         const struct target_core_fabric_ops *tfo;
 901         struct t10_pr_registration *pr_reg;
 902         unsigned char buf[384];
 903         char i_buf[PR_REG_ISID_ID_LEN];
 904         ssize_t len = 0;
 905         int reg_count = 0;
 906
 907         len += sprintf(page+len, "SPC-3 PR Registrations:\n");
 908
 909         spin_lock(&dev->t10_pr.registration_lock);
 910         list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
 911                         pr_reg_list) {
 912
 913                 memset(buf, 0, 384);
 914                 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
 915                 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
 916                 core_pr_dump_initiator_port(pr_reg, i_buf,
 917                                         PR_REG_ISID_ID_LEN);
 918                 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
 919                         tfo->get_fabric_name(),
 920                         pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
 921                         pr_reg->pr_res_generation);
 922
 923                 if (len + strlen(buf) >= PAGE_SIZE)
 924                         break;
 925
 926                 len += sprintf(page+len, "%s", buf);
 927                 reg_count++;
 928         }
 929         spin_unlock(&dev->t10_pr.registration_lock);
 930
 931         if (!reg_count)
 932                 len += sprintf(page+len, "None\n");
 933
 934         return len;
 935 }
 936
 937 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
 938
 939 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
 940                 struct se_device *dev, char *page)
 941 {
 942         struct t10_pr_registration *pr_reg;
 943         ssize_t len = 0;
 944
 945         spin_lock(&dev->dev_reservation_lock);
 946         pr_reg = dev->dev_pr_res_holder;
 947         if (pr_reg) {
 948                 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
 949                         core_scsi3_pr_dump_type(pr_reg->pr_res_type));
 950         } else {
 951                 len = sprintf(page, "No SPC-3 Reservation holder\n");
 952         }
 953
 954         spin_unlock(&dev->dev_reservation_lock);
 955         return len;
 956 }
 957
 958 SE_DEV_PR_ATTR_RO(res_pr_type);
 959
 960 static ssize_t target_core_dev_pr_show_attr_res_type(
 961                 struct se_device *dev, char *page)
 962 {
 963         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
 964                 return sprintf(page, "SPC_PASSTHROUGH\n");
 965         else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
 966                 return sprintf(page, "SPC2_RESERVATIONS\n");
 967         else
 968                 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
 969 }
 970
 971 SE_DEV_PR_ATTR_RO(res_type);
 972
 973 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
 974                 struct se_device *dev, char *page)
 975 {
 976         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
 977                 return 0;
 978
 979         return sprintf(page, "APTPL Bit Status: %s\n",
 980                 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
 981 }
 982
 983 SE_DEV_PR_ATTR_RO(res_aptpl_active);
 984
 985 /*
 986  * res_aptpl_metadata
 987  */
 988 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
 989                 struct se_device *dev, char *page)
 990 {
 991         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
 992                 return 0;
 993
 994         return sprintf(page, "Ready to process PR APTPL metadata..\n");
 995 }
 996
 997 enum {
 998         Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
 999         Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1000         Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1001         Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1002 };
1003
1004 static match_table_t tokens = {
1005         {Opt_initiator_fabric, "initiator_fabric=%s"},
1006         {Opt_initiator_node, "initiator_node=%s"},
1007         {Opt_initiator_sid, "initiator_sid=%s"},
1008         {Opt_sa_res_key, "sa_res_key=%s"},
1009         {Opt_res_holder, "res_holder=%d"},
1010         {Opt_res_type, "res_type=%d"},
1011         {Opt_res_scope, "res_scope=%d"},
1012         {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1013         {Opt_mapped_lun, "mapped_lun=%d"},
1014         {Opt_target_fabric, "target_fabric=%s"},
1015         {Opt_target_node, "target_node=%s"},
1016         {Opt_tpgt, "tpgt=%d"},
1017         {Opt_port_rtpi, "port_rtpi=%d"},
1018         {Opt_target_lun, "target_lun=%d"},
1019         {Opt_err, NULL}
1020 };
1021
1022 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1023         struct se_device *dev,
1024         const char *page,
1025         size_t count)
1026 {
1027         unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1028         unsigned char *t_fabric = NULL, *t_port = NULL;
1029         char *orig, *ptr, *opts;
1030         substring_t args[MAX_OPT_ARGS];
1031         unsigned long long tmp_ll;
1032         u64 sa_res_key = 0;
1033         u32 mapped_lun = 0, target_lun = 0;
1034         int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1035         u16 port_rpti = 0, tpgt = 0;
1036         u8 type = 0, scope;
1037
1038         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1039                 return 0;
1040         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1041                 return 0;
1042
1043         if (dev->export_count) {
1044                 pr_debug("Unable to process APTPL metadata while"
1045                         " active fabric exports exist\n");
1046                 return -EINVAL;
1047         }
1048
1049         opts = kstrdup(page, GFP_KERNEL);
1050         if (!opts)
1051                 return -ENOMEM;
1052
1053         orig = opts;
1054         while ((ptr = strsep(&opts, ",\n")) != NULL) {
1055                 if (!*ptr)
1056                         continue;
1057
1058                 token = match_token(ptr, tokens, args);
1059                 switch (token) {
1060                 case Opt_initiator_fabric:
1061                         i_fabric = match_strdup(args);
1062                         if (!i_fabric) {
1063                                 ret = -ENOMEM;
1064                                 goto out;
1065                         }
1066                         break;
1067                 case Opt_initiator_node:
1068                         i_port = match_strdup(args);
1069                         if (!i_port) {
1070                                 ret = -ENOMEM;
1071                                 goto out;
1072                         }
1073                         if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1074                                 pr_err("APTPL metadata initiator_node="
1075                                         " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1076                                         PR_APTPL_MAX_IPORT_LEN);
1077                                 ret = -EINVAL;
1078                                 break;
1079                         }
1080                         break;
1081                 case Opt_initiator_sid:
1082                         isid = match_strdup(args);
1083                         if (!isid) {
1084                                 ret = -ENOMEM;
1085                                 goto out;
1086                         }
1087                         if (strlen(isid) >= PR_REG_ISID_LEN) {
1088                                 pr_err("APTPL metadata initiator_isid"
1089                                         "= exceeds PR_REG_ISID_LEN: %d\n",
1090                                         PR_REG_ISID_LEN);
1091                                 ret = -EINVAL;
1092                                 break;
1093                         }
1094                         break;
1095                 case Opt_sa_res_key:
1096                         ret = kstrtoull(args->from, 0, &tmp_ll);
1097                         if (ret < 0) {
1098                                 pr_err("kstrtoull() failed for sa_res_key=\n");
1099                                 goto out;
1100                         }
1101                         sa_res_key = (u64)tmp_ll;
1102                         break;
1103                 /*
1104                  * PR APTPL Metadata for Reservation
1105                  */
1106                 case Opt_res_holder:
1107                         match_int(args, &arg);
1108                         res_holder = arg;
1109                         break;
1110                 case Opt_res_type:
1111                         match_int(args, &arg);
1112                         type = (u8)arg;
1113                         break;
1114                 case Opt_res_scope:
1115                         match_int(args, &arg);
1116                         scope = (u8)arg;
1117                         break;
1118                 case Opt_res_all_tg_pt:
1119                         match_int(args, &arg);
1120                         all_tg_pt = (int)arg;
1121                         break;
1122                 case Opt_mapped_lun:
1123                         match_int(args, &arg);
1124                         mapped_lun = (u32)arg;
1125                         break;
1126                 /*
1127                  * PR APTPL Metadata for Target Port
1128                  */
1129                 case Opt_target_fabric:
1130                         t_fabric = match_strdup(args);
1131                         if (!t_fabric) {
1132                                 ret = -ENOMEM;
1133                                 goto out;
1134                         }
1135                         break;
1136                 case Opt_target_node:
1137                         t_port = match_strdup(args);
1138                         if (!t_port) {
1139                                 ret = -ENOMEM;
1140                                 goto out;
1141                         }
1142                         if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1143                                 pr_err("APTPL metadata target_node="
1144                                         " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1145                                         PR_APTPL_MAX_TPORT_LEN);
1146                                 ret = -EINVAL;
1147                                 break;
1148                         }
1149                         break;
1150                 case Opt_tpgt:
1151                         match_int(args, &arg);
1152                         tpgt = (u16)arg;
1153                         break;
1154                 case Opt_port_rtpi:
1155                         match_int(args, &arg);
1156                         port_rpti = (u16)arg;
1157                         break;
1158                 case Opt_target_lun:
1159                         match_int(args, &arg);
1160                         target_lun = (u32)arg;
1161                         break;
1162                 default:
1163                         break;
1164                 }
1165         }
1166
1167         if (!i_port || !t_port || !sa_res_key) {
1168                 pr_err("Illegal parameters for APTPL registration\n");
1169                 ret = -EINVAL;
1170                 goto out;
1171         }
1172
1173         if (res_holder && !(type)) {
1174                 pr_err("Illegal PR type: 0x%02x for reservation"
1175                                 " holder\n", type);
1176                 ret = -EINVAL;
1177                 goto out;
1178         }
1179
1180         ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1181                         i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1182                         res_holder, all_tg_pt, type);
1183 out:
1184         kfree(i_fabric);
1185         kfree(i_port);
1186         kfree(isid);
1187         kfree(t_fabric);
1188         kfree(t_port);
1189         kfree(orig);
1190         return (ret == 0) ? count : ret;
1191 }
1192
1193 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1194
1195 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
1196
1197 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1198         &target_core_dev_pr_res_holder.attr,
1199         &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1200         &target_core_dev_pr_res_pr_generation.attr,
1201         &target_core_dev_pr_res_pr_holder_tg_port.attr,
1202         &target_core_dev_pr_res_pr_registered_i_pts.attr,
1203         &target_core_dev_pr_res_pr_type.attr,
1204         &target_core_dev_pr_res_type.attr,
1205         &target_core_dev_pr_res_aptpl_active.attr,
1206         &target_core_dev_pr_res_aptpl_metadata.attr,
1207         NULL,
1208 };
1209
1210 static struct configfs_item_operations target_core_dev_pr_ops = {
1211         .show_attribute         = target_core_dev_pr_attr_show,
1212         .store_attribute        = target_core_dev_pr_attr_store,
1213 };
1214
1215 TB_CIT_SETUP(dev_pr, &target_core_dev_pr_ops, NULL, target_core_dev_pr_attrs);
1216
1217 /*  End functions for struct config_item_type tb_dev_pr_cit */
1218
1219 /*  Start functions for struct config_item_type tb_dev_cit */
1220
1221 static ssize_t target_core_show_dev_info(void *p, char *page)
1222 {
1223         struct se_device *dev = p;
1224         struct se_subsystem_api *t = dev->transport;
1225         int bl = 0;
1226         ssize_t read_bytes = 0;
1227
1228         transport_dump_dev_state(dev, page, &bl);
1229         read_bytes += bl;
1230         read_bytes += t->show_configfs_dev_params(dev, page+read_bytes);
1231         return read_bytes;
1232 }
1233
1234 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1235         .attr   = { .ca_owner = THIS_MODULE,
1236                     .ca_name = "info",
1237                     .ca_mode = S_IRUGO },
1238         .show   = target_core_show_dev_info,
1239         .store  = NULL,
1240 };
1241
1242 static ssize_t target_core_store_dev_control(
1243         void *p,
1244         const char *page,
1245         size_t count)
1246 {
1247         struct se_device *dev = p;
1248         struct se_subsystem_api *t = dev->transport;
1249
1250         return t->set_configfs_dev_params(dev, page, count);
1251 }
1252
1253 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1254         .attr   = { .ca_owner = THIS_MODULE,
1255                     .ca_name = "control",
1256                     .ca_mode = S_IWUSR },
1257         .show   = NULL,
1258         .store  = target_core_store_dev_control,
1259 };
1260
1261 static ssize_t target_core_show_dev_alias(void *p, char *page)
1262 {
1263         struct se_device *dev = p;
1264
1265         if (!(dev->dev_flags & DF_USING_ALIAS))
1266                 return 0;
1267
1268         return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1269 }
1270
1271 static ssize_t target_core_store_dev_alias(
1272         void *p,
1273         const char *page,
1274         size_t count)
1275 {
1276         struct se_device *dev = p;
1277         struct se_hba *hba = dev->se_hba;
1278         ssize_t read_bytes;
1279
1280         if (count > (SE_DEV_ALIAS_LEN-1)) {
1281                 pr_err("alias count: %d exceeds"
1282                         " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1283                         SE_DEV_ALIAS_LEN-1);
1284                 return -EINVAL;
1285         }
1286
1287         read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1288         if (!read_bytes)
1289                 return -EINVAL;
1290         if (dev->dev_alias[read_bytes - 1] == '\n')
1291                 dev->dev_alias[read_bytes - 1] = '\0';
1292
1293         dev->dev_flags |= DF_USING_ALIAS;
1294
1295         pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1296                 config_item_name(&hba->hba_group.cg_item),
1297                 config_item_name(&dev->dev_group.cg_item),
1298                 dev->dev_alias);
1299
1300         return read_bytes;
1301 }
1302
1303 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1304         .attr   = { .ca_owner = THIS_MODULE,
1305                     .ca_name = "alias",
1306                     .ca_mode =  S_IRUGO | S_IWUSR },
1307         .show   = target_core_show_dev_alias,
1308         .store  = target_core_store_dev_alias,
1309 };
1310
1311 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1312 {
1313         struct se_device *dev = p;
1314
1315         if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1316                 return 0;
1317
1318         return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1319 }
1320
1321 static ssize_t target_core_store_dev_udev_path(
1322         void *p,
1323         const char *page,
1324         size_t count)
1325 {
1326         struct se_device *dev = p;
1327         struct se_hba *hba = dev->se_hba;
1328         ssize_t read_bytes;
1329
1330         if (count > (SE_UDEV_PATH_LEN-1)) {
1331                 pr_err("udev_path count: %d exceeds"
1332                         " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1333                         SE_UDEV_PATH_LEN-1);
1334                 return -EINVAL;
1335         }
1336
1337         read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1338                         "%s", page);
1339         if (!read_bytes)
1340                 return -EINVAL;
1341         if (dev->udev_path[read_bytes - 1] == '\n')
1342                 dev->udev_path[read_bytes - 1] = '\0';
1343
1344         dev->dev_flags |= DF_USING_UDEV_PATH;
1345
1346         pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1347                 config_item_name(&hba->hba_group.cg_item),
1348                 config_item_name(&dev->dev_group.cg_item),
1349                 dev->udev_path);
1350
1351         return read_bytes;
1352 }
1353
1354 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1355         .attr   = { .ca_owner = THIS_MODULE,
1356                     .ca_name = "udev_path",
1357                     .ca_mode =  S_IRUGO | S_IWUSR },
1358         .show   = target_core_show_dev_udev_path,
1359         .store  = target_core_store_dev_udev_path,
1360 };
1361
1362 static ssize_t target_core_show_dev_enable(void *p, char *page)
1363 {
1364         struct se_device *dev = p;
1365
1366         return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1367 }
1368
1369 static ssize_t target_core_store_dev_enable(
1370         void *p,
1371         const char *page,
1372         size_t count)
1373 {
1374         struct se_device *dev = p;
1375         char *ptr;
1376         int ret;
1377
1378         ptr = strstr(page, "1");
1379         if (!ptr) {
1380                 pr_err("For dev_enable ops, only valid value"
1381                                 " is \"1\"\n");
1382                 return -EINVAL;
1383         }
1384
1385         ret = target_configure_device(dev);
1386         if (ret)
1387                 return ret;
1388         return count;
1389 }
1390
1391 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1392         .attr   = { .ca_owner = THIS_MODULE,
1393                     .ca_name = "enable",
1394                     .ca_mode =  S_IRUGO | S_IWUSR },
1395         .show   = target_core_show_dev_enable,
1396         .store  = target_core_store_dev_enable,
1397 };
1398
1399 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1400 {
1401         struct se_device *dev = p;
1402         struct config_item *lu_ci;
1403         struct t10_alua_lu_gp *lu_gp;
1404         struct t10_alua_lu_gp_member *lu_gp_mem;
1405         ssize_t len = 0;
1406
1407         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1408         if (!lu_gp_mem)
1409                 return 0;
1410
1411         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1412         lu_gp = lu_gp_mem->lu_gp;
1413         if (lu_gp) {
1414                 lu_ci = &lu_gp->lu_gp_group.cg_item;
1415                 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1416                         config_item_name(lu_ci), lu_gp->lu_gp_id);
1417         }
1418         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1419
1420         return len;
1421 }
1422
1423 static ssize_t target_core_store_alua_lu_gp(
1424         void *p,
1425         const char *page,
1426         size_t count)
1427 {
1428         struct se_device *dev = p;
1429         struct se_hba *hba = dev->se_hba;
1430         struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1431         struct t10_alua_lu_gp_member *lu_gp_mem;
1432         unsigned char buf[LU_GROUP_NAME_BUF];
1433         int move = 0;
1434
1435         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1436         if (!lu_gp_mem)
1437                 return 0;
1438
1439         if (count > LU_GROUP_NAME_BUF) {
1440                 pr_err("ALUA LU Group Alias too large!\n");
1441                 return -EINVAL;
1442         }
1443         memset(buf, 0, LU_GROUP_NAME_BUF);
1444         memcpy(buf, page, count);
1445         /*
1446          * Any ALUA logical unit alias besides "NULL" means we will be
1447          * making a new group association.
1448          */
1449         if (strcmp(strstrip(buf), "NULL")) {
1450                 /*
1451                  * core_alua_get_lu_gp_by_name() will increment reference to
1452                  * struct t10_alua_lu_gp.  This reference is released with
1453                  * core_alua_get_lu_gp_by_name below().
1454                  */
1455                 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1456                 if (!lu_gp_new)
1457                         return -ENODEV;
1458         }
1459
1460         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1461         lu_gp = lu_gp_mem->lu_gp;
1462         if (lu_gp) {
1463                 /*
1464                  * Clearing an existing lu_gp association, and replacing
1465                  * with NULL
1466                  */
1467                 if (!lu_gp_new) {
1468                         pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1469                                 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1470                                 " %hu\n",
1471                                 config_item_name(&hba->hba_group.cg_item),
1472                                 config_item_name(&dev->dev_group.cg_item),
1473                                 config_item_name(&lu_gp->lu_gp_group.cg_item),
1474                                 lu_gp->lu_gp_id);
1475
1476                         __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1477                         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1478
1479                         return count;
1480                 }
1481                 /*
1482                  * Removing existing association of lu_gp_mem with lu_gp
1483                  */
1484                 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1485                 move = 1;
1486         }
1487         /*
1488          * Associate lu_gp_mem with lu_gp_new.
1489          */
1490         __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1491         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1492
1493         pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1494                 " core/alua/lu_gps/%s, ID: %hu\n",
1495                 (move) ? "Moving" : "Adding",
1496                 config_item_name(&hba->hba_group.cg_item),
1497                 config_item_name(&dev->dev_group.cg_item),
1498                 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1499                 lu_gp_new->lu_gp_id);
1500
1501         core_alua_put_lu_gp_from_name(lu_gp_new);
1502         return count;
1503 }
1504
1505 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1506         .attr   = { .ca_owner = THIS_MODULE,
1507                     .ca_name = "alua_lu_gp",
1508                     .ca_mode = S_IRUGO | S_IWUSR },
1509         .show   = target_core_show_alua_lu_gp,
1510         .store  = target_core_store_alua_lu_gp,
1511 };
1512
1513 static ssize_t target_core_show_dev_lba_map(void *p, char *page)
1514 {
1515         struct se_device *dev = p;
1516         struct t10_alua_lba_map *map;
1517         struct t10_alua_lba_map_member *mem;
1518         char *b = page;
1519         int bl = 0;
1520         char state;
1521
1522         spin_lock(&dev->t10_alua.lba_map_lock);
1523         if (!list_empty(&dev->t10_alua.lba_map_list))
1524             bl += sprintf(b + bl, "%u %u\n",
1525                           dev->t10_alua.lba_map_segment_size,
1526                           dev->t10_alua.lba_map_segment_multiplier);
1527         list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
1528                 bl += sprintf(b + bl, "%llu %llu",
1529                               map->lba_map_first_lba, map->lba_map_last_lba);
1530                 list_for_each_entry(mem, &map->lba_map_mem_list,
1531                                     lba_map_mem_list) {
1532                         switch (mem->lba_map_mem_alua_state) {
1533                         case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
1534                                 state = 'O';
1535                                 break;
1536                         case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
1537                                 state = 'A';
1538                                 break;
1539                         case ALUA_ACCESS_STATE_STANDBY:
1540                                 state = 'S';
1541                                 break;
1542                         case ALUA_ACCESS_STATE_UNAVAILABLE:
1543                                 state = 'U';
1544                                 break;
1545                         default:
1546                                 state = '.';
1547                                 break;
1548                         }
1549                         bl += sprintf(b + bl, " %d:%c",
1550                                       mem->lba_map_mem_alua_pg_id, state);
1551                 }
1552                 bl += sprintf(b + bl, "\n");
1553         }
1554         spin_unlock(&dev->t10_alua.lba_map_lock);
1555         return bl;
1556 }
1557
1558 static ssize_t target_core_store_dev_lba_map(
1559         void *p,
1560         const char *page,
1561         size_t count)
1562 {
1563         struct se_device *dev = p;
1564         struct t10_alua_lba_map *lba_map = NULL;
1565         struct list_head lba_list;
1566         char *map_entries, *ptr;
1567         char state;
1568         int pg_num = -1, pg;
1569         int ret = 0, num = 0, pg_id, alua_state;
1570         unsigned long start_lba = -1, end_lba = -1;
1571         unsigned long segment_size = -1, segment_mult = -1;
1572
1573         map_entries = kstrdup(page, GFP_KERNEL);
1574         if (!map_entries)
1575                 return -ENOMEM;
1576
1577         INIT_LIST_HEAD(&lba_list);
1578         while ((ptr = strsep(&map_entries, "\n")) != NULL) {
1579                 if (!*ptr)
1580                         continue;
1581
1582                 if (num == 0) {
1583                         if (sscanf(ptr, "%lu %lu\n",
1584                                    &segment_size, &segment_mult) != 2) {
1585                                 pr_err("Invalid line %d\n", num);
1586                                 ret = -EINVAL;
1587                                 break;
1588                         }
1589                         num++;
1590                         continue;
1591                 }
1592                 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
1593                         pr_err("Invalid line %d\n", num);
1594                         ret = -EINVAL;
1595                         break;
1596                 }
1597                 ptr = strchr(ptr, ' ');
1598                 if (!ptr) {
1599                         pr_err("Invalid line %d, missing end lba\n", num);
1600                         ret = -EINVAL;
1601                         break;
1602                 }
1603                 ptr++;
1604                 ptr = strchr(ptr, ' ');
1605                 if (!ptr) {
1606                         pr_err("Invalid line %d, missing state definitions\n",
1607                                num);
1608                         ret = -EINVAL;
1609                         break;
1610                 }
1611                 ptr++;
1612                 lba_map = core_alua_allocate_lba_map(&lba_list,
1613                                                      start_lba, end_lba);
1614                 if (IS_ERR(lba_map)) {
1615                         ret = PTR_ERR(lba_map);
1616                         break;
1617                 }
1618                 pg = 0;
1619                 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
1620                         switch (state) {
1621                         case 'O':
1622                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
1623                                 break;
1624                         case 'A':
1625                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
1626                                 break;
1627                         case 'S':
1628                                 alua_state = ALUA_ACCESS_STATE_STANDBY;
1629                                 break;
1630                         case 'U':
1631                                 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
1632                                 break;
1633                         default:
1634                                 pr_err("Invalid ALUA state '%c'\n", state);
1635                                 ret = -EINVAL;
1636                                 goto out;
1637                         }
1638
1639                         ret = core_alua_allocate_lba_map_mem(lba_map,
1640                                                              pg_id, alua_state);
1641                         if (ret) {
1642                                 pr_err("Invalid target descriptor %d:%c "
1643                                        "at line %d\n",
1644                                        pg_id, state, num);
1645                                 break;
1646                         }
1647                         pg++;
1648                         ptr = strchr(ptr, ' ');
1649                         if (ptr)
1650                                 ptr++;
1651                         else
1652                                 break;
1653                 }
1654                 if (pg_num == -1)
1655                     pg_num = pg;
1656                 else if (pg != pg_num) {
1657                         pr_err("Only %d from %d port groups definitions "
1658                                "at line %d\n", pg, pg_num, num);
1659                         ret = -EINVAL;
1660                         break;
1661                 }
1662                 num++;
1663         }
1664 out:
1665         if (ret) {
1666                 core_alua_free_lba_map(&lba_list);
1667                 count = ret;
1668         } else
1669                 core_alua_set_lba_map(dev, &lba_list,
1670                                       segment_size, segment_mult);
1671         kfree(map_entries);
1672         return count;
1673 }
1674
1675 static struct target_core_configfs_attribute target_core_attr_dev_lba_map = {
1676         .attr   = { .ca_owner = THIS_MODULE,
1677                     .ca_name = "lba_map",
1678                     .ca_mode = S_IRUGO | S_IWUSR },
1679         .show   = target_core_show_dev_lba_map,
1680         .store  = target_core_store_dev_lba_map,
1681 };
1682
1683 static struct configfs_attribute *target_core_dev_attrs[] = {
1684         &target_core_attr_dev_info.attr,
1685         &target_core_attr_dev_control.attr,
1686         &target_core_attr_dev_alias.attr,
1687         &target_core_attr_dev_udev_path.attr,
1688         &target_core_attr_dev_enable.attr,
1689         &target_core_attr_dev_alua_lu_gp.attr,
1690         &target_core_attr_dev_lba_map.attr,
1691         NULL,
1692 };
1693
1694 static void target_core_dev_release(struct config_item *item)
1695 {
1696         struct config_group *dev_cg = to_config_group(item);
1697         struct se_device *dev =
1698                 container_of(dev_cg, struct se_device, dev_group);
1699
1700         kfree(dev_cg->default_groups);
1701         target_free_device(dev);
1702 }
1703
1704 static ssize_t target_core_dev_show(struct config_item *item,
1705                                      struct configfs_attribute *attr,
1706                                      char *page)
1707 {
1708         struct config_group *dev_cg = to_config_group(item);
1709         struct se_device *dev =
1710                 container_of(dev_cg, struct se_device, dev_group);
1711         struct target_core_configfs_attribute *tc_attr = container_of(
1712                         attr, struct target_core_configfs_attribute, attr);
1713
1714         if (!tc_attr->show)
1715                 return -EINVAL;
1716
1717         return tc_attr->show(dev, page);
1718 }
1719
1720 static ssize_t target_core_dev_store(struct config_item *item,
1721                                       struct configfs_attribute *attr,
1722                                       const char *page, size_t count)
1723 {
1724         struct config_group *dev_cg = to_config_group(item);
1725         struct se_device *dev =
1726                 container_of(dev_cg, struct se_device, dev_group);
1727         struct target_core_configfs_attribute *tc_attr = container_of(
1728                         attr, struct target_core_configfs_attribute, attr);
1729
1730         if (!tc_attr->store)
1731                 return -EINVAL;
1732
1733         return tc_attr->store(dev, page, count);
1734 }
1735
1736 static struct configfs_item_operations target_core_dev_item_ops = {
1737         .release                = target_core_dev_release,
1738         .show_attribute         = target_core_dev_show,
1739         .store_attribute        = target_core_dev_store,
1740 };
1741
1742 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
1743
1744 /* End functions for struct config_item_type tb_dev_cit */
1745
1746 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
1747
1748 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
1749 #define SE_DEV_ALUA_LU_ATTR(_name, _mode)                               \
1750 static struct target_core_alua_lu_gp_attribute                          \
1751                         target_core_alua_lu_gp_##_name =                \
1752         __CONFIGFS_EATTR(_name, _mode,                                  \
1753         target_core_alua_lu_gp_show_attr_##_name,                       \
1754         target_core_alua_lu_gp_store_attr_##_name);
1755
1756 #define SE_DEV_ALUA_LU_ATTR_RO(_name)                                   \
1757 static struct target_core_alua_lu_gp_attribute                          \
1758                         target_core_alua_lu_gp_##_name =                \
1759         __CONFIGFS_EATTR_RO(_name,                                      \
1760         target_core_alua_lu_gp_show_attr_##_name);
1761
1762 /*
1763  * lu_gp_id
1764  */
1765 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
1766         struct t10_alua_lu_gp *lu_gp,
1767         char *page)
1768 {
1769         if (!lu_gp->lu_gp_valid_id)
1770                 return 0;
1771
1772         return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
1773 }
1774
1775 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
1776         struct t10_alua_lu_gp *lu_gp,
1777         const char *page,
1778         size_t count)
1779 {
1780         struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
1781         unsigned long lu_gp_id;
1782         int ret;
1783
1784         ret = kstrtoul(page, 0, &lu_gp_id);
1785         if (ret < 0) {
1786                 pr_err("kstrtoul() returned %d for"
1787                         " lu_gp_id\n", ret);
1788                 return ret;
1789         }
1790         if (lu_gp_id > 0x0000ffff) {
1791                 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
1792                         " 0x0000ffff\n", lu_gp_id);
1793                 return -EINVAL;
1794         }
1795
1796         ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
1797         if (ret < 0)
1798                 return -EINVAL;
1799
1800         pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
1801                 " Group: core/alua/lu_gps/%s to ID: %hu\n",
1802                 config_item_name(&alua_lu_gp_cg->cg_item),
1803                 lu_gp->lu_gp_id);
1804
1805         return count;
1806 }
1807
1808 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
1809
1810 /*
1811  * members
1812  */
1813 static ssize_t target_core_alua_lu_gp_show_attr_members(
1814         struct t10_alua_lu_gp *lu_gp,
1815         char *page)
1816 {
1817         struct se_device *dev;
1818         struct se_hba *hba;
1819         struct t10_alua_lu_gp_member *lu_gp_mem;
1820         ssize_t len = 0, cur_len;
1821         unsigned char buf[LU_GROUP_NAME_BUF];
1822
1823         memset(buf, 0, LU_GROUP_NAME_BUF);
1824
1825         spin_lock(&lu_gp->lu_gp_lock);
1826         list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
1827                 dev = lu_gp_mem->lu_gp_mem_dev;
1828                 hba = dev->se_hba;
1829
1830                 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
1831                         config_item_name(&hba->hba_group.cg_item),
1832                         config_item_name(&dev->dev_group.cg_item));
1833                 cur_len++; /* Extra byte for NULL terminator */
1834
1835                 if ((cur_len + len) > PAGE_SIZE) {
1836                         pr_warn("Ran out of lu_gp_show_attr"
1837                                 "_members buffer\n");
1838                         break;
1839                 }
1840                 memcpy(page+len, buf, cur_len);
1841                 len += cur_len;
1842         }
1843         spin_unlock(&lu_gp->lu_gp_lock);
1844
1845         return len;
1846 }
1847
1848 SE_DEV_ALUA_LU_ATTR_RO(members);
1849
1850 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
1851
1852 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
1853         &target_core_alua_lu_gp_lu_gp_id.attr,
1854         &target_core_alua_lu_gp_members.attr,
1855         NULL,
1856 };
1857
1858 static void target_core_alua_lu_gp_release(struct config_item *item)
1859 {
1860         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1861                         struct t10_alua_lu_gp, lu_gp_group);
1862
1863         core_alua_free_lu_gp(lu_gp);
1864 }
1865
1866 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
1867         .release                = target_core_alua_lu_gp_release,
1868         .show_attribute         = target_core_alua_lu_gp_attr_show,
1869         .store_attribute        = target_core_alua_lu_gp_attr_store,
1870 };
1871
1872 static struct config_item_type target_core_alua_lu_gp_cit = {
1873         .ct_item_ops            = &target_core_alua_lu_gp_ops,
1874         .ct_attrs               = target_core_alua_lu_gp_attrs,
1875         .ct_owner               = THIS_MODULE,
1876 };
1877
1878 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
1879
1880 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
1881
1882 static struct config_group *target_core_alua_create_lu_gp(
1883         struct config_group *group,
1884         const char *name)
1885 {
1886         struct t10_alua_lu_gp *lu_gp;
1887         struct config_group *alua_lu_gp_cg = NULL;
1888         struct config_item *alua_lu_gp_ci = NULL;
1889
1890         lu_gp = core_alua_allocate_lu_gp(name, 0);
1891         if (IS_ERR(lu_gp))
1892                 return NULL;
1893
1894         alua_lu_gp_cg = &lu_gp->lu_gp_group;
1895         alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
1896
1897         config_group_init_type_name(alua_lu_gp_cg, name,
1898                         &target_core_alua_lu_gp_cit);
1899
1900         pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
1901                 " Group: core/alua/lu_gps/%s\n",
1902                 config_item_name(alua_lu_gp_ci));
1903
1904         return alua_lu_gp_cg;
1905
1906 }
1907
1908 static void target_core_alua_drop_lu_gp(
1909         struct config_group *group,
1910         struct config_item *item)
1911 {
1912         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1913                         struct t10_alua_lu_gp, lu_gp_group);
1914
1915         pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
1916                 " Group: core/alua/lu_gps/%s, ID: %hu\n",
1917                 config_item_name(item), lu_gp->lu_gp_id);
1918         /*
1919          * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
1920          * -> target_core_alua_lu_gp_release()
1921          */
1922         config_item_put(item);
1923 }
1924
1925 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
1926         .make_group             = &target_core_alua_create_lu_gp,
1927         .drop_item              = &target_core_alua_drop_lu_gp,
1928 };
1929
1930 static struct config_item_type target_core_alua_lu_gps_cit = {
1931         .ct_item_ops            = NULL,
1932         .ct_group_ops           = &target_core_alua_lu_gps_group_ops,
1933         .ct_owner               = THIS_MODULE,
1934 };
1935
1936 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
1937
1938 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
1939
1940 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
1941 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode)                            \
1942 static struct target_core_alua_tg_pt_gp_attribute                       \
1943                         target_core_alua_tg_pt_gp_##_name =             \
1944         __CONFIGFS_EATTR(_name, _mode,                                  \
1945         target_core_alua_tg_pt_gp_show_attr_##_name,                    \
1946         target_core_alua_tg_pt_gp_store_attr_##_name);
1947
1948 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name)                                \
1949 static struct target_core_alua_tg_pt_gp_attribute                       \
1950                         target_core_alua_tg_pt_gp_##_name =             \
1951         __CONFIGFS_EATTR_RO(_name,                                      \
1952         target_core_alua_tg_pt_gp_show_attr_##_name);
1953
1954 /*
1955  * alua_access_state
1956  */
1957 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
1958         struct t10_alua_tg_pt_gp *tg_pt_gp,
1959         char *page)
1960 {
1961         return sprintf(page, "%d\n",
1962                 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
1963 }
1964
1965 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
1966         struct t10_alua_tg_pt_gp *tg_pt_gp,
1967         const char *page,
1968         size_t count)
1969 {
1970         struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
1971         unsigned long tmp;
1972         int new_state, ret;
1973
1974         if (!tg_pt_gp->tg_pt_gp_valid_id) {
1975                 pr_err("Unable to do implicit ALUA on non valid"
1976                         " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
1977                 return -EINVAL;
1978         }
1979         if (!(dev->dev_flags & DF_CONFIGURED)) {
1980                 pr_err("Unable to set alua_access_state while device is"
1981                        " not configured\n");
1982                 return -ENODEV;
1983         }
1984
1985         ret = kstrtoul(page, 0, &tmp);
1986         if (ret < 0) {
1987                 pr_err("Unable to extract new ALUA access state from"
1988                                 " %s\n", page);
1989                 return ret;
1990         }
1991         new_state = (int)tmp;
1992
1993         if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
1994                 pr_err("Unable to process implicit configfs ALUA"
1995                         " transition while TPGS_IMPLICIT_ALUA is disabled\n");
1996                 return -EINVAL;
1997         }
1998         if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
1999             new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2000                 /* LBA DEPENDENT is only allowed with implicit ALUA */
2001                 pr_err("Unable to process implicit configfs ALUA transition"
2002                        " while explicit ALUA management is enabled\n");
2003                 return -EINVAL;
2004         }
2005
2006         ret = core_alua_do_port_transition(tg_pt_gp, dev,
2007                                         NULL, NULL, new_state, 0);
2008         return (!ret) ? count : -EINVAL;
2009 }
2010
2011 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2012
2013 /*
2014  * alua_access_status
2015  */
2016 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2017         struct t10_alua_tg_pt_gp *tg_pt_gp,
2018         char *page)
2019 {
2020         return sprintf(page, "%s\n",
2021                 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2022 }
2023
2024 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2025         struct t10_alua_tg_pt_gp *tg_pt_gp,
2026         const char *page,
2027         size_t count)
2028 {
2029         unsigned long tmp;
2030         int new_status, ret;
2031
2032         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2033                 pr_err("Unable to do set ALUA access status on non"
2034                         " valid tg_pt_gp ID: %hu\n",
2035                         tg_pt_gp->tg_pt_gp_valid_id);
2036                 return -EINVAL;
2037         }
2038
2039         ret = kstrtoul(page, 0, &tmp);
2040         if (ret < 0) {
2041                 pr_err("Unable to extract new ALUA access status"
2042                                 " from %s\n", page);
2043                 return ret;
2044         }
2045         new_status = (int)tmp;
2046
2047         if ((new_status != ALUA_STATUS_NONE) &&
2048             (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2049             (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2050                 pr_err("Illegal ALUA access status: 0x%02x\n",
2051                                 new_status);
2052                 return -EINVAL;
2053         }
2054
2055         tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2056         return count;
2057 }
2058
2059 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2060
2061 /*
2062  * alua_access_type
2063  */
2064 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2065         struct t10_alua_tg_pt_gp *tg_pt_gp,
2066         char *page)
2067 {
2068         return core_alua_show_access_type(tg_pt_gp, page);
2069 }
2070
2071 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2072         struct t10_alua_tg_pt_gp *tg_pt_gp,
2073         const char *page,
2074         size_t count)
2075 {
2076         return core_alua_store_access_type(tg_pt_gp, page, count);
2077 }
2078
2079 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2080
2081 /*
2082  * alua_supported_states
2083  */
2084
2085 #define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit)               \
2086 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \
2087         struct t10_alua_tg_pt_gp *t, char *p)                           \
2088 {                                                                       \
2089         return sprintf(p, "%d\n", !!(t->_var & _bit));                  \
2090 }
2091
2092 #define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit)              \
2093 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\
2094         struct t10_alua_tg_pt_gp *t, const char *p, size_t c)           \
2095 {                                                                       \
2096         unsigned long tmp;                                              \
2097         int ret;                                                        \
2098                                                                         \
2099         if (!t->tg_pt_gp_valid_id) {                                    \
2100                 pr_err("Unable to do set ##_name ALUA state on non"     \
2101                        " valid tg_pt_gp ID: %hu\n",                     \
2102                        t->tg_pt_gp_valid_id);                           \
2103                 return -EINVAL;                                         \
2104         }                                                               \
2105                                                                         \
2106         ret = kstrtoul(p, 0, &tmp);                                     \
2107         if (ret < 0) {                                                  \
2108                 pr_err("Invalid value '%s', must be '0' or '1'\n", p);  \
2109                 return -EINVAL;                                         \
2110         }                                                               \
2111         if (tmp > 1) {                                                  \
2112                 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2113                 return -EINVAL;                                         \
2114         }                                                               \
2115         if (tmp)                                                        \
2116                 t->_var |= _bit;                                        \
2117         else                                                            \
2118                 t->_var &= ~_bit;                                       \
2119                                                                         \
2120         return c;                                                       \
2121 }
2122
2123 SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning,
2124                                tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2125 SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning,
2126                                 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2127 SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR);
2128
2129 SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline,
2130                                tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2131 SE_DEV_ALUA_SUPPORT_STATE_STORE(offline,
2132                                 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2133 SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR);
2134
2135 SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent,
2136                                tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2137 SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent,
2138                                 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2139 SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO);
2140
2141 SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable,
2142                                tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2143 SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable,
2144                                 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2145 SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR);
2146
2147 SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby,
2148                                tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2149 SE_DEV_ALUA_SUPPORT_STATE_STORE(standby,
2150                                 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2151 SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR);
2152
2153 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized,
2154                                tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2155 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized,
2156                                 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2157 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR);
2158
2159 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized,
2160                                tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2161 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized,
2162                                 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2163 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR);
2164
2165 /*
2166  * alua_write_metadata
2167  */
2168 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2169         struct t10_alua_tg_pt_gp *tg_pt_gp,
2170         char *page)
2171 {
2172         return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2173 }
2174
2175 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2176         struct t10_alua_tg_pt_gp *tg_pt_gp,
2177         const char *page,
2178         size_t count)
2179 {
2180         unsigned long tmp;
2181         int ret;
2182
2183         ret = kstrtoul(page, 0, &tmp);
2184         if (ret < 0) {
2185                 pr_err("Unable to extract alua_write_metadata\n");
2186                 return ret;
2187         }
2188
2189         if ((tmp != 0) && (tmp != 1)) {
2190                 pr_err("Illegal value for alua_write_metadata:"
2191                         " %lu\n", tmp);
2192                 return -EINVAL;
2193         }
2194         tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2195
2196         return count;
2197 }
2198
2199 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2200
2201
2202
2203 /*
2204  * nonop_delay_msecs
2205  */
2206 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2207         struct t10_alua_tg_pt_gp *tg_pt_gp,
2208         char *page)
2209 {
2210         return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2211
2212 }
2213
2214 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2215         struct t10_alua_tg_pt_gp *tg_pt_gp,
2216         const char *page,
2217         size_t count)
2218 {
2219         return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2220 }
2221
2222 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2223
2224 /*
2225  * trans_delay_msecs
2226  */
2227 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2228         struct t10_alua_tg_pt_gp *tg_pt_gp,
2229         char *page)
2230 {
2231         return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2232 }
2233
2234 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2235         struct t10_alua_tg_pt_gp *tg_pt_gp,
2236         const char *page,
2237         size_t count)
2238 {
2239         return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2240 }
2241
2242 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2243
2244 /*
2245  * implicit_trans_secs
2246  */
2247 static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs(
2248         struct t10_alua_tg_pt_gp *tg_pt_gp,
2249         char *page)
2250 {
2251         return core_alua_show_implicit_trans_secs(tg_pt_gp, page);
2252 }
2253
2254 static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs(
2255         struct t10_alua_tg_pt_gp *tg_pt_gp,
2256         const char *page,
2257         size_t count)
2258 {
2259         return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count);
2260 }
2261
2262 SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR);
2263
2264 /*
2265  * preferred
2266  */
2267
2268 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2269         struct t10_alua_tg_pt_gp *tg_pt_gp,
2270         char *page)
2271 {
2272         return core_alua_show_preferred_bit(tg_pt_gp, page);
2273 }
2274
2275 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2276         struct t10_alua_tg_pt_gp *tg_pt_gp,
2277         const char *page,
2278         size_t count)
2279 {
2280         return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2281 }
2282
2283 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2284
2285 /*
2286  * tg_pt_gp_id
2287  */
2288 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2289         struct t10_alua_tg_pt_gp *tg_pt_gp,
2290         char *page)
2291 {
2292         if (!tg_pt_gp->tg_pt_gp_valid_id)
2293                 return 0;
2294
2295         return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2296 }
2297
2298 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2299         struct t10_alua_tg_pt_gp *tg_pt_gp,
2300         const char *page,
2301         size_t count)
2302 {
2303         struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2304         unsigned long tg_pt_gp_id;
2305         int ret;
2306
2307         ret = kstrtoul(page, 0, &tg_pt_gp_id);
2308         if (ret < 0) {
2309                 pr_err("kstrtoul() returned %d for"
2310                         " tg_pt_gp_id\n", ret);
2311                 return ret;
2312         }
2313         if (tg_pt_gp_id > 0x0000ffff) {
2314                 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2315                         " 0x0000ffff\n", tg_pt_gp_id);
2316                 return -EINVAL;
2317         }
2318
2319         ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2320         if (ret < 0)
2321                 return -EINVAL;
2322
2323         pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2324                 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2325                 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2326                 tg_pt_gp->tg_pt_gp_id);
2327
2328         return count;
2329 }
2330
2331 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2332
2333 /*
2334  * members
2335  */
2336 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2337         struct t10_alua_tg_pt_gp *tg_pt_gp,
2338         char *page)
2339 {
2340         struct se_port *port;
2341         struct se_portal_group *tpg;
2342         struct se_lun *lun;
2343         struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2344         ssize_t len = 0, cur_len;
2345         unsigned char buf[TG_PT_GROUP_NAME_BUF];
2346
2347         memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2348
2349         spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2350         list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2351                         tg_pt_gp_mem_list) {
2352                 port = tg_pt_gp_mem->tg_pt;
2353                 tpg = port->sep_tpg;
2354                 lun = port->sep_lun;
2355
2356                 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2357                         "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2358                         tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2359                         tpg->se_tpg_tfo->tpg_get_tag(tpg),
2360                         config_item_name(&lun->lun_group.cg_item));
2361                 cur_len++; /* Extra byte for NULL terminator */
2362
2363                 if ((cur_len + len) > PAGE_SIZE) {
2364                         pr_warn("Ran out of lu_gp_show_attr"
2365                                 "_members buffer\n");
2366                         break;
2367                 }
2368                 memcpy(page+len, buf, cur_len);
2369                 len += cur_len;
2370         }
2371         spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2372
2373         return len;
2374 }
2375
2376 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2377
2378 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2379                         tg_pt_gp_group);
2380
2381 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2382         &target_core_alua_tg_pt_gp_alua_access_state.attr,
2383         &target_core_alua_tg_pt_gp_alua_access_status.attr,
2384         &target_core_alua_tg_pt_gp_alua_access_type.attr,
2385         &target_core_alua_tg_pt_gp_alua_support_transitioning.attr,
2386         &target_core_alua_tg_pt_gp_alua_support_offline.attr,
2387         &target_core_alua_tg_pt_gp_alua_support_lba_dependent.attr,
2388         &target_core_alua_tg_pt_gp_alua_support_unavailable.attr,
2389         &target_core_alua_tg_pt_gp_alua_support_standby.attr,
2390         &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized.attr,
2391         &target_core_alua_tg_pt_gp_alua_support_active_optimized.attr,
2392         &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2393         &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2394         &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2395         &target_core_alua_tg_pt_gp_implicit_trans_secs.attr,
2396         &target_core_alua_tg_pt_gp_preferred.attr,
2397         &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2398         &target_core_alua_tg_pt_gp_members.attr,
2399         NULL,
2400 };
2401
2402 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2403 {
2404         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2405                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2406
2407         core_alua_free_tg_pt_gp(tg_pt_gp);
2408 }
2409
2410 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2411         .release                = target_core_alua_tg_pt_gp_release,
2412         .show_attribute         = target_core_alua_tg_pt_gp_attr_show,
2413         .store_attribute        = target_core_alua_tg_pt_gp_attr_store,
2414 };
2415
2416 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2417         .ct_item_ops            = &target_core_alua_tg_pt_gp_ops,
2418         .ct_attrs               = target_core_alua_tg_pt_gp_attrs,
2419         .ct_owner               = THIS_MODULE,
2420 };
2421
2422 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2423
2424 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2425
2426 static struct config_group *target_core_alua_create_tg_pt_gp(
2427         struct config_group *group,
2428         const char *name)
2429 {
2430         struct t10_alua *alua = container_of(group, struct t10_alua,
2431                                         alua_tg_pt_gps_group);
2432         struct t10_alua_tg_pt_gp *tg_pt_gp;
2433         struct config_group *alua_tg_pt_gp_cg = NULL;
2434         struct config_item *alua_tg_pt_gp_ci = NULL;
2435
2436         tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2437         if (!tg_pt_gp)
2438                 return NULL;
2439
2440         alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2441         alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2442
2443         config_group_init_type_name(alua_tg_pt_gp_cg, name,
2444                         &target_core_alua_tg_pt_gp_cit);
2445
2446         pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2447                 " Group: alua/tg_pt_gps/%s\n",
2448                 config_item_name(alua_tg_pt_gp_ci));
2449
2450         return alua_tg_pt_gp_cg;
2451 }
2452
2453 static void target_core_alua_drop_tg_pt_gp(
2454         struct config_group *group,
2455         struct config_item *item)
2456 {
2457         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2458                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2459
2460         pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2461                 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2462                 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2463         /*
2464          * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2465          * -> target_core_alua_tg_pt_gp_release().
2466          */
2467         config_item_put(item);
2468 }
2469
2470 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2471         .make_group             = &target_core_alua_create_tg_pt_gp,
2472         .drop_item              = &target_core_alua_drop_tg_pt_gp,
2473 };
2474
2475 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
2476
2477 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2478
2479 /* Start functions for struct config_item_type target_core_alua_cit */
2480
2481 /*
2482  * target_core_alua_cit is a ConfigFS group that lives under
2483  * /sys/kernel/config/target/core/alua.  There are default groups
2484  * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2485  * target_core_alua_cit in target_core_init_configfs() below.
2486  */
2487 static struct config_item_type target_core_alua_cit = {
2488         .ct_item_ops            = NULL,
2489         .ct_attrs               = NULL,
2490         .ct_owner               = THIS_MODULE,
2491 };
2492
2493 /* End functions for struct config_item_type target_core_alua_cit */
2494
2495 /* Start functions for struct config_item_type tb_dev_stat_cit */
2496
2497 static struct config_group *target_core_stat_mkdir(
2498         struct config_group *group,
2499         const char *name)
2500 {
2501         return ERR_PTR(-ENOSYS);
2502 }
2503
2504 static void target_core_stat_rmdir(
2505         struct config_group *group,
2506         struct config_item *item)
2507 {
2508         return;
2509 }
2510
2511 static struct configfs_group_operations target_core_stat_group_ops = {
2512         .make_group             = &target_core_stat_mkdir,
2513         .drop_item              = &target_core_stat_rmdir,
2514 };
2515
2516 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
2517
2518 /* End functions for struct config_item_type tb_dev_stat_cit */
2519
2520 /* Start functions for struct config_item_type target_core_hba_cit */
2521
2522 static struct config_group *target_core_make_subdev(
2523         struct config_group *group,
2524         const char *name)
2525 {
2526         struct t10_alua_tg_pt_gp *tg_pt_gp;
2527         struct se_subsystem_api *t;
2528         struct config_item *hba_ci = &group->cg_item;
2529         struct se_hba *hba = item_to_hba(hba_ci);
2530         struct se_device *dev;
2531         struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2532         struct config_group *dev_stat_grp = NULL;
2533         int errno = -ENOMEM, ret;
2534
2535         ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2536         if (ret)
2537                 return ERR_PTR(ret);
2538         /*
2539          * Locate the struct se_subsystem_api from parent's struct se_hba.
2540          */
2541         t = hba->transport;
2542
2543         dev = target_alloc_device(hba, name);
2544         if (!dev)
2545                 goto out_unlock;
2546
2547         dev_cg = &dev->dev_group;
2548
2549         dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
2550                         GFP_KERNEL);
2551         if (!dev_cg->default_groups)
2552                 goto out_free_device;
2553
2554         config_group_init_type_name(dev_cg, name, &t->tb_cits.tb_dev_cit);
2555         config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2556                         &t->tb_cits.tb_dev_attrib_cit);
2557         config_group_init_type_name(&dev->dev_pr_group, "pr",
2558                         &t->tb_cits.tb_dev_pr_cit);
2559         config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2560                         &t->tb_cits.tb_dev_wwn_cit);
2561         config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2562                         "alua", &t->tb_cits.tb_dev_alua_tg_pt_gps_cit);
2563         config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2564                         "statistics", &t->tb_cits.tb_dev_stat_cit);
2565
2566         dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
2567         dev_cg->default_groups[1] = &dev->dev_pr_group;
2568         dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
2569         dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
2570         dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
2571         dev_cg->default_groups[5] = NULL;
2572         /*
2573          * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2574          */
2575         tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2576         if (!tg_pt_gp)
2577                 goto out_free_dev_cg_default_groups;
2578         dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2579
2580         tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2581         tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2582                                 GFP_KERNEL);
2583         if (!tg_pt_gp_cg->default_groups) {
2584                 pr_err("Unable to allocate tg_pt_gp_cg->"
2585                                 "default_groups\n");
2586                 goto out_free_tg_pt_gp;
2587         }
2588
2589         config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2590                         "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2591         tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2592         tg_pt_gp_cg->default_groups[1] = NULL;
2593         /*
2594          * Add core/$HBA/$DEV/statistics/ default groups
2595          */
2596         dev_stat_grp = &dev->dev_stat_grps.stat_group;
2597         dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
2598                                 GFP_KERNEL);
2599         if (!dev_stat_grp->default_groups) {
2600                 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2601                 goto out_free_tg_pt_gp_cg_default_groups;
2602         }
2603         target_stat_setup_dev_default_groups(dev);
2604
2605         mutex_unlock(&hba->hba_access_mutex);
2606         return dev_cg;
2607
2608 out_free_tg_pt_gp_cg_default_groups:
2609         kfree(tg_pt_gp_cg->default_groups);
2610 out_free_tg_pt_gp:
2611         core_alua_free_tg_pt_gp(tg_pt_gp);
2612 out_free_dev_cg_default_groups:
2613         kfree(dev_cg->default_groups);
2614 out_free_device:
2615         target_free_device(dev);
2616 out_unlock:
2617         mutex_unlock(&hba->hba_access_mutex);
2618         return ERR_PTR(errno);
2619 }
2620
2621 static void target_core_drop_subdev(
2622         struct config_group *group,
2623         struct config_item *item)
2624 {
2625         struct config_group *dev_cg = to_config_group(item);
2626         struct se_device *dev =
2627                 container_of(dev_cg, struct se_device, dev_group);
2628         struct se_hba *hba;
2629         struct config_item *df_item;
2630         struct config_group *tg_pt_gp_cg, *dev_stat_grp;
2631         int i;
2632
2633         hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
2634
2635         mutex_lock(&hba->hba_access_mutex);
2636
2637         dev_stat_grp = &dev->dev_stat_grps.stat_group;
2638         for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2639                 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2640                 dev_stat_grp->default_groups[i] = NULL;
2641                 config_item_put(df_item);
2642         }
2643         kfree(dev_stat_grp->default_groups);
2644
2645         tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2646         for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2647                 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2648                 tg_pt_gp_cg->default_groups[i] = NULL;
2649                 config_item_put(df_item);
2650         }
2651         kfree(tg_pt_gp_cg->default_groups);
2652         /*
2653          * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2654          * directly from target_core_alua_tg_pt_gp_release().
2655          */
2656         dev->t10_alua.default_tg_pt_gp = NULL;
2657
2658         for (i = 0; dev_cg->default_groups[i]; i++) {
2659                 df_item = &dev_cg->default_groups[i]->cg_item;
2660                 dev_cg->default_groups[i] = NULL;
2661                 config_item_put(df_item);
2662         }
2663         /*
2664          * se_dev is released from target_core_dev_item_ops->release()
2665          */
2666         config_item_put(item);
2667         mutex_unlock(&hba->hba_access_mutex);
2668 }
2669
2670 static struct configfs_group_operations target_core_hba_group_ops = {
2671         .make_group             = target_core_make_subdev,
2672         .drop_item              = target_core_drop_subdev,
2673 };
2674
2675 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2676 #define SE_HBA_ATTR(_name, _mode)                               \
2677 static struct target_core_hba_attribute                         \
2678                 target_core_hba_##_name =                       \
2679                 __CONFIGFS_EATTR(_name, _mode,                  \
2680                 target_core_hba_show_attr_##_name,              \
2681                 target_core_hba_store_attr_##_name);
2682
2683 #define SE_HBA_ATTR_RO(_name)                                   \
2684 static struct target_core_hba_attribute                         \
2685                 target_core_hba_##_name =                       \
2686                 __CONFIGFS_EATTR_RO(_name,                      \
2687                 target_core_hba_show_attr_##_name);
2688
2689 static ssize_t target_core_hba_show_attr_hba_info(
2690         struct se_hba *hba,
2691         char *page)
2692 {
2693         return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2694                         hba->hba_id, hba->transport->name,
2695                         TARGET_CORE_CONFIGFS_VERSION);
2696 }
2697
2698 SE_HBA_ATTR_RO(hba_info);
2699
2700 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2701                                 char *page)
2702 {
2703         int hba_mode = 0;
2704
2705         if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2706                 hba_mode = 1;
2707
2708         return sprintf(page, "%d\n", hba_mode);
2709 }
2710
2711 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2712                                 const char *page, size_t count)
2713 {
2714         struct se_subsystem_api *transport = hba->transport;
2715         unsigned long mode_flag;
2716         int ret;
2717
2718         if (transport->pmode_enable_hba == NULL)
2719                 return -EINVAL;
2720
2721         ret = kstrtoul(page, 0, &mode_flag);
2722         if (ret < 0) {
2723                 pr_err("Unable to extract hba mode flag: %d\n", ret);
2724                 return ret;
2725         }
2726
2727         if (hba->dev_count) {
2728                 pr_err("Unable to set hba_mode with active devices\n");
2729                 return -EINVAL;
2730         }
2731
2732         ret = transport->pmode_enable_hba(hba, mode_flag);
2733         if (ret < 0)
2734                 return -EINVAL;
2735         if (ret > 0)
2736                 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2737         else if (ret == 0)
2738                 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2739
2740         return count;
2741 }
2742
2743 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2744
2745 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2746
2747 static void target_core_hba_release(struct config_item *item)
2748 {
2749         struct se_hba *hba = container_of(to_config_group(item),
2750                                 struct se_hba, hba_group);
2751         core_delete_hba(hba);
2752 }
2753
2754 static struct configfs_attribute *target_core_hba_attrs[] = {
2755         &target_core_hba_hba_info.attr,
2756         &target_core_hba_hba_mode.attr,
2757         NULL,
2758 };
2759
2760 static struct configfs_item_operations target_core_hba_item_ops = {
2761         .release                = target_core_hba_release,
2762         .show_attribute         = target_core_hba_attr_show,
2763         .store_attribute        = target_core_hba_attr_store,
2764 };
2765
2766 static struct config_item_type target_core_hba_cit = {
2767         .ct_item_ops            = &target_core_hba_item_ops,
2768         .ct_group_ops           = &target_core_hba_group_ops,
2769         .ct_attrs               = target_core_hba_attrs,
2770         .ct_owner               = THIS_MODULE,
2771 };
2772
2773 static struct config_group *target_core_call_addhbatotarget(
2774         struct config_group *group,
2775         const char *name)
2776 {
2777         char *se_plugin_str, *str, *str2;
2778         struct se_hba *hba;
2779         char buf[TARGET_CORE_NAME_MAX_LEN];
2780         unsigned long plugin_dep_id = 0;
2781         int ret;
2782
2783         memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
2784         if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
2785                 pr_err("Passed *name strlen(): %d exceeds"
2786                         " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
2787                         TARGET_CORE_NAME_MAX_LEN);
2788                 return ERR_PTR(-ENAMETOOLONG);
2789         }
2790         snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
2791
2792         str = strstr(buf, "_");
2793         if (!str) {
2794                 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
2795                 return ERR_PTR(-EINVAL);
2796         }
2797         se_plugin_str = buf;
2798         /*
2799          * Special case for subsystem plugins that have "_" in their names.
2800          * Namely rd_direct and rd_mcp..
2801          */
2802         str2 = strstr(str+1, "_");
2803         if (str2) {
2804                 *str2 = '\0'; /* Terminate for *se_plugin_str */
2805                 str2++; /* Skip to start of plugin dependent ID */
2806                 str = str2;
2807         } else {
2808                 *str = '\0'; /* Terminate for *se_plugin_str */
2809                 str++; /* Skip to start of plugin dependent ID */
2810         }
2811
2812         ret = kstrtoul(str, 0, &plugin_dep_id);
2813         if (ret < 0) {
2814                 pr_err("kstrtoul() returned %d for"
2815                                 " plugin_dep_id\n", ret);
2816                 return ERR_PTR(ret);
2817         }
2818         /*
2819          * Load up TCM subsystem plugins if they have not already been loaded.
2820          */
2821         transport_subsystem_check_init();
2822
2823         hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
2824         if (IS_ERR(hba))
2825                 return ERR_CAST(hba);
2826
2827         config_group_init_type_name(&hba->hba_group, name,
2828                         &target_core_hba_cit);
2829
2830         return &hba->hba_group;
2831 }
2832
2833 static void target_core_call_delhbafromtarget(
2834         struct config_group *group,
2835         struct config_item *item)
2836 {
2837         /*
2838          * core_delete_hba() is called from target_core_hba_item_ops->release()
2839          * -> target_core_hba_release()
2840          */
2841         config_item_put(item);
2842 }
2843
2844 static struct configfs_group_operations target_core_group_ops = {
2845         .make_group     = target_core_call_addhbatotarget,
2846         .drop_item      = target_core_call_delhbafromtarget,
2847 };
2848
2849 static struct config_item_type target_core_cit = {
2850         .ct_item_ops    = NULL,
2851         .ct_group_ops   = &target_core_group_ops,
2852         .ct_attrs       = NULL,
2853         .ct_owner       = THIS_MODULE,
2854 };
2855
2856 /* Stop functions for struct config_item_type target_core_hba_cit */
2857
2858 void target_core_setup_sub_cits(struct se_subsystem_api *sa)
2859 {
2860         target_core_setup_dev_cit(sa);
2861         target_core_setup_dev_attrib_cit(sa);
2862         target_core_setup_dev_pr_cit(sa);
2863         target_core_setup_dev_wwn_cit(sa);
2864         target_core_setup_dev_alua_tg_pt_gps_cit(sa);
2865         target_core_setup_dev_stat_cit(sa);
2866 }
2867 EXPORT_SYMBOL(target_core_setup_sub_cits);
2868
2869 static int __init target_core_init_configfs(void)
2870 {
2871         struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
2872         struct config_group *lu_gp_cg = NULL;
2873         struct configfs_subsystem *subsys;
2874         struct t10_alua_lu_gp *lu_gp;
2875         int ret;
2876
2877         pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
2878                 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
2879                 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
2880
2881         subsys = target_core_subsystem[0];
2882         config_group_init(&subsys->su_group);
2883         mutex_init(&subsys->su_mutex);
2884
2885         ret = init_se_kmem_caches();
2886         if (ret < 0)
2887                 return ret;
2888         /*
2889          * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
2890          * and ALUA Logical Unit Group and Target Port Group infrastructure.
2891          */
2892         target_cg = &subsys->su_group;
2893         target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2894                                 GFP_KERNEL);
2895         if (!target_cg->default_groups) {
2896                 pr_err("Unable to allocate target_cg->default_groups\n");
2897                 ret = -ENOMEM;
2898                 goto out_global;
2899         }
2900
2901         config_group_init_type_name(&target_core_hbagroup,
2902                         "core", &target_core_cit);
2903         target_cg->default_groups[0] = &target_core_hbagroup;
2904         target_cg->default_groups[1] = NULL;
2905         /*
2906          * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
2907          */
2908         hba_cg = &target_core_hbagroup;
2909         hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2910                                 GFP_KERNEL);
2911         if (!hba_cg->default_groups) {
2912                 pr_err("Unable to allocate hba_cg->default_groups\n");
2913                 ret = -ENOMEM;
2914                 goto out_global;
2915         }
2916         config_group_init_type_name(&alua_group,
2917                         "alua", &target_core_alua_cit);
2918         hba_cg->default_groups[0] = &alua_group;
2919         hba_cg->default_groups[1] = NULL;
2920         /*
2921          * Add ALUA Logical Unit Group and Target Port Group ConfigFS
2922          * groups under /sys/kernel/config/target/core/alua/
2923          */
2924         alua_cg = &alua_group;
2925         alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2926                         GFP_KERNEL);
2927         if (!alua_cg->default_groups) {
2928                 pr_err("Unable to allocate alua_cg->default_groups\n");
2929                 ret = -ENOMEM;
2930                 goto out_global;
2931         }
2932
2933         config_group_init_type_name(&alua_lu_gps_group,
2934                         "lu_gps", &target_core_alua_lu_gps_cit);
2935         alua_cg->default_groups[0] = &alua_lu_gps_group;
2936         alua_cg->default_groups[1] = NULL;
2937         /*
2938          * Add core/alua/lu_gps/default_lu_gp
2939          */
2940         lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
2941         if (IS_ERR(lu_gp)) {
2942                 ret = -ENOMEM;
2943                 goto out_global;
2944         }
2945
2946         lu_gp_cg = &alua_lu_gps_group;
2947         lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2948                         GFP_KERNEL);
2949         if (!lu_gp_cg->default_groups) {
2950                 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
2951                 ret = -ENOMEM;
2952                 goto out_global;
2953         }
2954
2955         config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
2956                                 &target_core_alua_lu_gp_cit);
2957         lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
2958         lu_gp_cg->default_groups[1] = NULL;
2959         default_lu_gp = lu_gp;
2960         /*
2961          * Register the target_core_mod subsystem with configfs.
2962          */
2963         ret = configfs_register_subsystem(subsys);
2964         if (ret < 0) {
2965                 pr_err("Error %d while registering subsystem %s\n",
2966                         ret, subsys->su_group.cg_item.ci_namebuf);
2967                 goto out_global;
2968         }
2969         pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
2970                 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
2971                 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
2972         /*
2973          * Register built-in RAMDISK subsystem logic for virtual LUN 0
2974          */
2975         ret = rd_module_init();
2976         if (ret < 0)
2977                 goto out;
2978
2979         ret = core_dev_setup_virtual_lun0();
2980         if (ret < 0)
2981                 goto out;
2982
2983         ret = target_xcopy_setup_pt();
2984         if (ret < 0)
2985                 goto out;
2986
2987         return 0;
2988
2989 out:
2990         configfs_unregister_subsystem(subsys);
2991         core_dev_release_virtual_lun0();
2992         rd_module_exit();
2993 out_global:
2994         if (default_lu_gp) {
2995                 core_alua_free_lu_gp(default_lu_gp);
2996                 default_lu_gp = NULL;
2997         }
2998         if (lu_gp_cg)
2999                 kfree(lu_gp_cg->default_groups);
3000         if (alua_cg)
3001                 kfree(alua_cg->default_groups);
3002         if (hba_cg)
3003                 kfree(hba_cg->default_groups);
3004         kfree(target_cg->default_groups);
3005         release_se_kmem_caches();
3006         return ret;
3007 }
3008
3009 static void __exit target_core_exit_configfs(void)
3010 {
3011         struct configfs_subsystem *subsys;
3012         struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3013         struct config_item *item;
3014         int i;
3015
3016         subsys = target_core_subsystem[0];
3017
3018         lu_gp_cg = &alua_lu_gps_group;
3019         for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3020                 item = &lu_gp_cg->default_groups[i]->cg_item;
3021                 lu_gp_cg->default_groups[i] = NULL;
3022                 config_item_put(item);
3023         }
3024         kfree(lu_gp_cg->default_groups);
3025         lu_gp_cg->default_groups = NULL;
3026
3027         alua_cg = &alua_group;
3028         for (i = 0; alua_cg->default_groups[i]; i++) {
3029                 item = &alua_cg->default_groups[i]->cg_item;
3030                 alua_cg->default_groups[i] = NULL;
3031                 config_item_put(item);
3032         }
3033         kfree(alua_cg->default_groups);
3034         alua_cg->default_groups = NULL;
3035
3036         hba_cg = &target_core_hbagroup;
3037         for (i = 0; hba_cg->default_groups[i]; i++) {
3038                 item = &hba_cg->default_groups[i]->cg_item;
3039                 hba_cg->default_groups[i] = NULL;
3040                 config_item_put(item);
3041         }
3042         kfree(hba_cg->default_groups);
3043         hba_cg->default_groups = NULL;
3044         /*
3045          * We expect subsys->su_group.default_groups to be released
3046          * by configfs subsystem provider logic..
3047          */
3048         configfs_unregister_subsystem(subsys);
3049         kfree(subsys->su_group.default_groups);
3050
3051         core_alua_free_lu_gp(default_lu_gp);
3052         default_lu_gp = NULL;
3053
3054         pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3055                         " Infrastructure\n");
3056
3057         core_dev_release_virtual_lun0();
3058         rd_module_exit();
3059         target_xcopy_release_pt();
3060         release_se_kmem_caches();
3061 }
3062
3063 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3064 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3065 MODULE_LICENSE("GPL");
3066
3067 module_init(target_core_init_configfs);
3068 module_exit(target_core_exit_configfs);