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/configfs_macros.h>
  45
  46 #include "target_core_internal.h"
  47 #include "target_core_alua.h"
  48 #include "target_core_pr.h"
  49 #include "target_core_rd.h"
  50 #include "target_core_xcopy.h"
  51
  52 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs)              \
  53 static void target_core_setup_##_name##_cit(struct target_backend *tb)  \
  54 {                                                                       \
  55         struct config_item_type *cit = &tb->tb_##_name##_cit;           \
  56                                                                         \
  57         cit->ct_item_ops = _item_ops;                                   \
  58         cit->ct_group_ops = _group_ops;                                 \
  59         cit->ct_attrs = _attrs;                                         \
  60         cit->ct_owner = tb->ops->owner;                                 \
  61         pr_debug("Setup generic %s\n", __stringify(_name));             \
  62 }
  63
  64 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops)                  \
  65 static void target_core_setup_##_name##_cit(struct target_backend *tb)  \
  66 {                                                                       \
  67         struct config_item_type *cit = &tb->tb_##_name##_cit;           \
  68                                                                         \
  69         cit->ct_item_ops = _item_ops;                                   \
  70         cit->ct_group_ops = _group_ops;                                 \
  71         cit->ct_attrs = tb->ops->tb_##_name##_attrs;                    \
  72         cit->ct_owner = tb->ops->owner;                                 \
  73         pr_debug("Setup generic %s\n", __stringify(_name));             \
  74 }
  75
  76 extern struct t10_alua_lu_gp *default_lu_gp;
  77
  78 static LIST_HEAD(g_tf_list);
  79 static DEFINE_MUTEX(g_tf_lock);
  80
  81 struct target_core_configfs_attribute {
  82         struct configfs_attribute attr;
  83         ssize_t (*show)(void *, char *);
  84         ssize_t (*store)(void *, const char *, size_t);
  85 };
  86
  87 static struct config_group target_core_hbagroup;
  88 static struct config_group alua_group;
  89 static struct config_group alua_lu_gps_group;
  90
  91 static inline struct se_hba *
  92 item_to_hba(struct config_item *item)
  93 {
  94         return container_of(to_config_group(item), struct se_hba, hba_group);
  95 }
  96
  97 /*
  98  * Attributes for /sys/kernel/config/target/
  99  */
 100 static ssize_t target_core_attr_show(struct config_item *item,
 101                                       struct configfs_attribute *attr,
 102                                       char *page)
 103 {
 104         return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
 105                 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION,
 106                 utsname()->sysname, utsname()->machine);
 107 }
 108
 109 static struct configfs_item_operations target_core_fabric_item_ops = {
 110         .show_attribute = target_core_attr_show,
 111 };
 112
 113 static struct configfs_attribute target_core_item_attr_version = {
 114         .ca_owner       = THIS_MODULE,
 115         .ca_name        = "version",
 116         .ca_mode        = S_IRUGO,
 117 };
 118
 119 static struct target_fabric_configfs *target_core_get_fabric(
 120         const char *name)
 121 {
 122         struct target_fabric_configfs *tf;
 123
 124         if (!name)
 125                 return NULL;
 126
 127         mutex_lock(&g_tf_lock);
 128         list_for_each_entry(tf, &g_tf_list, tf_list) {
 129                 if (!strcmp(tf->tf_ops->name, name)) {
 130                         atomic_inc(&tf->tf_access_cnt);
 131                         mutex_unlock(&g_tf_lock);
 132                         return tf;
 133                 }
 134         }
 135         mutex_unlock(&g_tf_lock);
 136
 137         return NULL;
 138 }
 139
 140 /*
 141  * Called from struct target_core_group_ops->make_group()
 142  */
 143 static struct config_group *target_core_register_fabric(
 144         struct config_group *group,
 145         const char *name)
 146 {
 147         struct target_fabric_configfs *tf;
 148         int ret;
 149
 150         pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
 151                         " %s\n", group, name);
 152
 153         tf = target_core_get_fabric(name);
 154         if (!tf) {
 155                 pr_debug("target_core_register_fabric() trying autoload for %s\n",
 156                          name);
 157
 158                 /*
 159                  * Below are some hardcoded request_module() calls to automatically
 160                  * local fabric modules when the following is called:
 161                  *
 162                  * mkdir -p /sys/kernel/config/target/$MODULE_NAME
 163                  *
 164                  * Note that this does not limit which TCM fabric module can be
 165                  * registered, but simply provids auto loading logic for modules with
 166                  * mkdir(2) system calls with known TCM fabric modules.
 167                  */
 168
 169                 if (!strncmp(name, "iscsi", 5)) {
 170                         /*
 171                          * Automatically load the LIO Target fabric module when the
 172                          * following is called:
 173                          *
 174                          * mkdir -p $CONFIGFS/target/iscsi
 175                          */
 176                         ret = request_module("iscsi_target_mod");
 177                         if (ret < 0) {
 178                                 pr_debug("request_module() failed for"
 179                                          " iscsi_target_mod.ko: %d\n", ret);
 180                                 return ERR_PTR(-EINVAL);
 181                         }
 182                 } else if (!strncmp(name, "loopback", 8)) {
 183                         /*
 184                          * Automatically load the tcm_loop fabric module when the
 185                          * following is called:
 186                          *
 187                          * mkdir -p $CONFIGFS/target/loopback
 188                          */
 189                         ret = request_module("tcm_loop");
 190                         if (ret < 0) {
 191                                 pr_debug("request_module() failed for"
 192                                          " tcm_loop.ko: %d\n", ret);
 193                                 return ERR_PTR(-EINVAL);
 194                         }
 195                 }
 196
 197                 tf = target_core_get_fabric(name);
 198         }
 199
 200         if (!tf) {
 201                 pr_debug("target_core_get_fabric() failed for %s\n",
 202                          name);
 203                 return ERR_PTR(-EINVAL);
 204         }
 205         pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
 206                         " %s\n", tf->tf_ops->name);
 207         /*
 208          * On a successful target_core_get_fabric() look, the returned
 209          * struct target_fabric_configfs *tf will contain a usage reference.
 210          */
 211         pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
 212                         &tf->tf_wwn_cit);
 213
 214         tf->tf_group.default_groups = tf->tf_default_groups;
 215         tf->tf_group.default_groups[0] = &tf->tf_disc_group;
 216         tf->tf_group.default_groups[1] = NULL;
 217
 218         config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit);
 219         config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
 220                         &tf->tf_discovery_cit);
 221
 222         pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
 223                         " %s\n", tf->tf_group.cg_item.ci_name);
 224         return &tf->tf_group;
 225 }
 226
 227 /*
 228  * Called from struct target_core_group_ops->drop_item()
 229  */
 230 static void target_core_deregister_fabric(
 231         struct config_group *group,
 232         struct config_item *item)
 233 {
 234         struct target_fabric_configfs *tf = container_of(
 235                 to_config_group(item), struct target_fabric_configfs, tf_group);
 236         struct config_group *tf_group;
 237         struct config_item *df_item;
 238         int i;
 239
 240         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
 241                 " tf list\n", config_item_name(item));
 242
 243         pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
 244                         " %s\n", tf->tf_ops->name);
 245         atomic_dec(&tf->tf_access_cnt);
 246
 247         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
 248                         " %s\n", config_item_name(item));
 249
 250         tf_group = &tf->tf_group;
 251         for (i = 0; tf_group->default_groups[i]; i++) {
 252                 df_item = &tf_group->default_groups[i]->cg_item;
 253                 tf_group->default_groups[i] = NULL;
 254                 config_item_put(df_item);
 255         }
 256         config_item_put(item);
 257 }
 258
 259 static struct configfs_group_operations target_core_fabric_group_ops = {
 260         .make_group     = &target_core_register_fabric,
 261         .drop_item      = &target_core_deregister_fabric,
 262 };
 263
 264 /*
 265  * All item attributes appearing in /sys/kernel/target/ appear here.
 266  */
 267 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
 268         &target_core_item_attr_version,
 269         NULL,
 270 };
 271
 272 /*
 273  * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
 274  */
 275 static struct config_item_type target_core_fabrics_item = {
 276         .ct_item_ops    = &target_core_fabric_item_ops,
 277         .ct_group_ops   = &target_core_fabric_group_ops,
 278         .ct_attrs       = target_core_fabric_item_attrs,
 279         .ct_owner       = THIS_MODULE,
 280 };
 281
 282 static struct configfs_subsystem target_core_fabrics = {
 283         .su_group = {
 284                 .cg_item = {
 285                         .ci_namebuf = "target",
 286                         .ci_type = &target_core_fabrics_item,
 287                 },
 288         },
 289 };
 290
 291 int target_depend_item(struct config_item *item)
 292 {
 293         return configfs_depend_item(&target_core_fabrics, item);
 294 }
 295 EXPORT_SYMBOL(target_depend_item);
 296
 297 void target_undepend_item(struct config_item *item)
 298 {
 299         return configfs_undepend_item(&target_core_fabrics, item);
 300 }
 301 EXPORT_SYMBOL(target_undepend_item);
 302
 303 /*##############################################################################
 304 // Start functions called by external Target Fabrics Modules
 305 //############################################################################*/
 306
 307 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
 308 {
 309         if (!tfo->name) {
 310                 pr_err("Missing tfo->name\n");
 311                 return -EINVAL;
 312         }
 313         if (strlen(tfo->name) >= TARGET_FABRIC_NAME_SIZE) {
 314                 pr_err("Passed name: %s exceeds TARGET_FABRIC"
 315                         "_NAME_SIZE\n", tfo->name);
 316                 return -EINVAL;
 317         }
 318         if (!tfo->get_fabric_name) {
 319                 pr_err("Missing tfo->get_fabric_name()\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_check_demo_mode) {
 331                 pr_err("Missing tfo->tpg_check_demo_mode()\n");
 332                 return -EINVAL;
 333         }
 334         if (!tfo->tpg_check_demo_mode_cache) {
 335                 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
 336                 return -EINVAL;
 337         }
 338         if (!tfo->tpg_check_demo_mode_write_protect) {
 339                 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
 340                 return -EINVAL;
 341         }
 342         if (!tfo->tpg_check_prod_mode_write_protect) {
 343                 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
 344                 return -EINVAL;
 345         }
 346         if (!tfo->tpg_get_inst_index) {
 347                 pr_err("Missing tfo->tpg_get_inst_index()\n");
 348                 return -EINVAL;
 349         }
 350         if (!tfo->release_cmd) {
 351                 pr_err("Missing tfo->release_cmd()\n");
 352                 return -EINVAL;
 353         }
 354         if (!tfo->shutdown_session) {
 355                 pr_err("Missing tfo->shutdown_session()\n");
 356                 return -EINVAL;
 357         }
 358         if (!tfo->close_session) {
 359                 pr_err("Missing tfo->close_session()\n");
 360                 return -EINVAL;
 361         }
 362         if (!tfo->sess_get_index) {
 363                 pr_err("Missing tfo->sess_get_index()\n");
 364                 return -EINVAL;
 365         }
 366         if (!tfo->write_pending) {
 367                 pr_err("Missing tfo->write_pending()\n");
 368                 return -EINVAL;
 369         }
 370         if (!tfo->write_pending_status) {
 371                 pr_err("Missing tfo->write_pending_status()\n");
 372                 return -EINVAL;
 373         }
 374         if (!tfo->set_default_node_attributes) {
 375                 pr_err("Missing tfo->set_default_node_attributes()\n");
 376                 return -EINVAL;
 377         }
 378         if (!tfo->get_cmd_state) {
 379                 pr_err("Missing tfo->get_cmd_state()\n");
 380                 return -EINVAL;
 381         }
 382         if (!tfo->queue_data_in) {
 383                 pr_err("Missing tfo->queue_data_in()\n");
 384                 return -EINVAL;
 385         }
 386         if (!tfo->queue_status) {
 387                 pr_err("Missing tfo->queue_status()\n");
 388                 return -EINVAL;
 389         }
 390         if (!tfo->queue_tm_rsp) {
 391                 pr_err("Missing tfo->queue_tm_rsp()\n");
 392                 return -EINVAL;
 393         }
 394         if (!tfo->aborted_task) {
 395                 pr_err("Missing tfo->aborted_task()\n");
 396                 return -EINVAL;
 397         }
 398         /*
 399          * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
 400          * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
 401          * target_core_fabric_configfs.c WWN+TPG group context code.
 402          */
 403         if (!tfo->fabric_make_wwn) {
 404                 pr_err("Missing tfo->fabric_make_wwn()\n");
 405                 return -EINVAL;
 406         }
 407         if (!tfo->fabric_drop_wwn) {
 408                 pr_err("Missing tfo->fabric_drop_wwn()\n");
 409                 return -EINVAL;
 410         }
 411         if (!tfo->fabric_make_tpg) {
 412                 pr_err("Missing tfo->fabric_make_tpg()\n");
 413                 return -EINVAL;
 414         }
 415         if (!tfo->fabric_drop_tpg) {
 416                 pr_err("Missing tfo->fabric_drop_tpg()\n");
 417                 return -EINVAL;
 418         }
 419
 420         return 0;
 421 }
 422
 423 int target_register_template(const struct target_core_fabric_ops *fo)
 424 {
 425         struct target_fabric_configfs *tf;
 426         int ret;
 427
 428         ret = target_fabric_tf_ops_check(fo);
 429         if (ret)
 430                 return ret;
 431
 432         tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
 433         if (!tf) {
 434                 pr_err("%s: could not allocate memory!\n", __func__);
 435                 return -ENOMEM;
 436         }
 437
 438         INIT_LIST_HEAD(&tf->tf_list);
 439         atomic_set(&tf->tf_access_cnt, 0);
 440         tf->tf_ops = fo;
 441         target_fabric_setup_cits(tf);
 442
 443         mutex_lock(&g_tf_lock);
 444         list_add_tail(&tf->tf_list, &g_tf_list);
 445         mutex_unlock(&g_tf_lock);
 446
 447         return 0;
 448 }
 449 EXPORT_SYMBOL(target_register_template);
 450
 451 void target_unregister_template(const struct target_core_fabric_ops *fo)
 452 {
 453         struct target_fabric_configfs *t;
 454
 455         mutex_lock(&g_tf_lock);
 456         list_for_each_entry(t, &g_tf_list, tf_list) {
 457                 if (!strcmp(t->tf_ops->name, fo->name)) {
 458                         BUG_ON(atomic_read(&t->tf_access_cnt));
 459                         list_del(&t->tf_list);
 460                         mutex_unlock(&g_tf_lock);
 461                         /*
 462                          * Wait for any outstanding fabric se_deve_entry->rcu_head
 463                          * callbacks to complete post kfree_rcu(), before allowing
 464                          * fabric driver unload of TFO->module to proceed.
 465                          */
 466                         rcu_barrier();
 467                         kfree(t);
 468                         return;
 469                 }
 470         }
 471         mutex_unlock(&g_tf_lock);
 472 }
 473 EXPORT_SYMBOL(target_unregister_template);
 474
 475 /*##############################################################################
 476 // Stop functions called by external Target Fabrics Modules
 477 //############################################################################*/
 478
 479 /* Start functions for struct config_item_type tb_dev_attrib_cit */
 480 #define DEF_TB_DEV_ATTRIB_SHOW(_name)                                   \
 481 static ssize_t show_##_name(struct se_dev_attrib *da, char *page)       \
 482 {                                                                       \
 483         return snprintf(page, PAGE_SIZE, "%u\n", da->_name);            \
 484 }
 485
 486 DEF_TB_DEV_ATTRIB_SHOW(emulate_model_alias);
 487 DEF_TB_DEV_ATTRIB_SHOW(emulate_dpo);
 488 DEF_TB_DEV_ATTRIB_SHOW(emulate_fua_write);
 489 DEF_TB_DEV_ATTRIB_SHOW(emulate_fua_read);
 490 DEF_TB_DEV_ATTRIB_SHOW(emulate_write_cache);
 491 DEF_TB_DEV_ATTRIB_SHOW(emulate_ua_intlck_ctrl);
 492 DEF_TB_DEV_ATTRIB_SHOW(emulate_tas);
 493 DEF_TB_DEV_ATTRIB_SHOW(emulate_tpu);
 494 DEF_TB_DEV_ATTRIB_SHOW(emulate_tpws);
 495 DEF_TB_DEV_ATTRIB_SHOW(emulate_caw);
 496 DEF_TB_DEV_ATTRIB_SHOW(emulate_3pc);
 497 DEF_TB_DEV_ATTRIB_SHOW(pi_prot_type);
 498 DEF_TB_DEV_ATTRIB_SHOW(hw_pi_prot_type);
 499 DEF_TB_DEV_ATTRIB_SHOW(pi_prot_format);
 500 DEF_TB_DEV_ATTRIB_SHOW(enforce_pr_isids);
 501 DEF_TB_DEV_ATTRIB_SHOW(is_nonrot);
 502 DEF_TB_DEV_ATTRIB_SHOW(emulate_rest_reord);
 503 DEF_TB_DEV_ATTRIB_SHOW(force_pr_aptpl);
 504 DEF_TB_DEV_ATTRIB_SHOW(hw_block_size);
 505 DEF_TB_DEV_ATTRIB_SHOW(block_size);
 506 DEF_TB_DEV_ATTRIB_SHOW(hw_max_sectors);
 507 DEF_TB_DEV_ATTRIB_SHOW(optimal_sectors);
 508 DEF_TB_DEV_ATTRIB_SHOW(hw_queue_depth);
 509 DEF_TB_DEV_ATTRIB_SHOW(queue_depth);
 510 DEF_TB_DEV_ATTRIB_SHOW(max_unmap_lba_count);
 511 DEF_TB_DEV_ATTRIB_SHOW(max_unmap_block_desc_count);
 512 DEF_TB_DEV_ATTRIB_SHOW(unmap_granularity);
 513 DEF_TB_DEV_ATTRIB_SHOW(unmap_granularity_alignment);
 514 DEF_TB_DEV_ATTRIB_SHOW(max_write_same_len);
 515
 516 #define DEF_TB_DEV_ATTRIB_STORE_U32(_name)                              \
 517 static ssize_t store_##_name(struct se_dev_attrib *da, const char *page,\
 518                 size_t count)                                           \
 519 {                                                                       \
 520         u32 val;                                                        \
 521         int ret;                                                        \
 522                                                                         \
 523         ret = kstrtou32(page, 0, &val);                                 \
 524         if (ret < 0)                                                    \
 525                 return ret;                                             \
 526         da->_name = val;                                                \
 527         return count;                                                   \
 528 }
 529
 530 DEF_TB_DEV_ATTRIB_STORE_U32(max_unmap_lba_count);
 531 DEF_TB_DEV_ATTRIB_STORE_U32(max_unmap_block_desc_count);
 532 DEF_TB_DEV_ATTRIB_STORE_U32(unmap_granularity);
 533 DEF_TB_DEV_ATTRIB_STORE_U32(unmap_granularity_alignment);
 534 DEF_TB_DEV_ATTRIB_STORE_U32(max_write_same_len);
 535
 536 #define DEF_TB_DEV_ATTRIB_STORE_BOOL(_name)                             \
 537 static ssize_t store_##_name(struct se_dev_attrib *da, const char *page,\
 538                 size_t count)                                           \
 539 {                                                                       \
 540         bool flag;                                                      \
 541         int ret;                                                        \
 542                                                                         \
 543         ret = strtobool(page, &flag);                                   \
 544         if (ret < 0)                                                    \
 545                 return ret;                                             \
 546         da->_name = flag;                                               \
 547         return count;                                                   \
 548 }
 549
 550 DEF_TB_DEV_ATTRIB_STORE_BOOL(emulate_fua_write);
 551 DEF_TB_DEV_ATTRIB_STORE_BOOL(emulate_caw);
 552 DEF_TB_DEV_ATTRIB_STORE_BOOL(emulate_3pc);
 553 DEF_TB_DEV_ATTRIB_STORE_BOOL(enforce_pr_isids);
 554 DEF_TB_DEV_ATTRIB_STORE_BOOL(is_nonrot);
 555
 556 #define DEF_TB_DEV_ATTRIB_STORE_STUB(_name)                             \
 557 static ssize_t store_##_name(struct se_dev_attrib *da, const char *page,\
 558                 size_t count)                                           \
 559 {                                                                       \
 560         printk_once(KERN_WARNING                                        \
 561                 "ignoring deprecated ##_name## attribute\n");   \
 562         return count;                                                   \
 563 }
 564
 565 DEF_TB_DEV_ATTRIB_STORE_STUB(emulate_dpo);
 566 DEF_TB_DEV_ATTRIB_STORE_STUB(emulate_fua_read);
 567
 568 static void dev_set_t10_wwn_model_alias(struct se_device *dev)
 569 {
 570         const char *configname;
 571
 572         configname = config_item_name(&dev->dev_group.cg_item);
 573         if (strlen(configname) >= 16) {
 574                 pr_warn("dev[%p]: Backstore name '%s' is too long for "
 575                         "INQUIRY_MODEL, truncating to 16 bytes\n", dev,
 576                         configname);
 577         }
 578         snprintf(&dev->t10_wwn.model[0], 16, "%s", configname);
 579 }
 580
 581 static ssize_t store_emulate_model_alias(struct se_dev_attrib *da,
 582                 const char *page, size_t count)
 583 {
 584         struct se_device *dev = da->da_dev;
 585         bool flag;
 586         int ret;
 587
 588         if (dev->export_count) {
 589                 pr_err("dev[%p]: Unable to change model alias"
 590                         " while export_count is %d\n",
 591                         dev, dev->export_count);
 592                 return -EINVAL;
 593         }
 594
 595         ret = strtobool(page, &flag);
 596         if (ret < 0)
 597                 return ret;
 598
 599         if (flag) {
 600                 dev_set_t10_wwn_model_alias(dev);
 601         } else {
 602                 strncpy(&dev->t10_wwn.model[0],
 603                         dev->transport->inquiry_prod, 16);
 604         }
 605         da->emulate_model_alias = flag;
 606         return count;
 607 }
 608
 609 static ssize_t store_emulate_write_cache(struct se_dev_attrib *da,
 610                 const char *page, size_t count)
 611 {
 612         bool flag;
 613         int ret;
 614
 615         ret = strtobool(page, &flag);
 616         if (ret < 0)
 617                 return ret;
 618
 619         if (flag && da->da_dev->transport->get_write_cache) {
 620                 pr_err("emulate_write_cache not supported for this device\n");
 621                 return -EINVAL;
 622         }
 623
 624         da->emulate_write_cache = flag;
 625         pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
 626                         da->da_dev, flag);
 627         return count;
 628 }
 629
 630 static ssize_t store_emulate_ua_intlck_ctrl(struct se_dev_attrib *da,
 631                 const char *page, size_t count)
 632 {
 633         u32 val;
 634         int ret;
 635
 636         ret = kstrtou32(page, 0, &val);
 637         if (ret < 0)
 638                 return ret;
 639
 640         if (val != 0 && val != 1 && val != 2) {
 641                 pr_err("Illegal value %d\n", val);
 642                 return -EINVAL;
 643         }
 644
 645         if (da->da_dev->export_count) {
 646                 pr_err("dev[%p]: Unable to change SE Device"
 647                         " UA_INTRLCK_CTRL while export_count is %d\n",
 648                         da->da_dev, da->da_dev->export_count);
 649                 return -EINVAL;
 650         }
 651         da->emulate_ua_intlck_ctrl = val;
 652         pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
 653                 da->da_dev, val);
 654         return count;
 655 }
 656
 657 static ssize_t store_emulate_tas(struct se_dev_attrib *da,
 658                 const char *page, size_t count)
 659 {
 660         bool flag;
 661         int ret;
 662
 663         ret = strtobool(page, &flag);
 664         if (ret < 0)
 665                 return ret;
 666
 667         if (da->da_dev->export_count) {
 668                 pr_err("dev[%p]: Unable to change SE Device TAS while"
 669                         " export_count is %d\n",
 670                         da->da_dev, da->da_dev->export_count);
 671                 return -EINVAL;
 672         }
 673         da->emulate_tas = flag;
 674         pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
 675                 da->da_dev, flag ? "Enabled" : "Disabled");
 676
 677         return count;
 678 }
 679
 680 static ssize_t store_emulate_tpu(struct se_dev_attrib *da,
 681                 const char *page, size_t count)
 682 {
 683         bool flag;
 684         int ret;
 685
 686         ret = strtobool(page, &flag);
 687         if (ret < 0)
 688                 return ret;
 689
 690         /*
 691          * We expect this value to be non-zero when generic Block Layer
 692          * Discard supported is detected iblock_create_virtdevice().
 693          */
 694         if (flag && !da->max_unmap_block_desc_count) {
 695                 pr_err("Generic Block Discard not supported\n");
 696                 return -ENOSYS;
 697         }
 698
 699         da->emulate_tpu = flag;
 700         pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
 701                 da->da_dev, flag);
 702         return count;
 703 }
 704
 705 static ssize_t store_emulate_tpws(struct se_dev_attrib *da,
 706                 const char *page, size_t count)
 707 {
 708         bool flag;
 709         int ret;
 710
 711         ret = strtobool(page, &flag);
 712         if (ret < 0)
 713                 return ret;
 714
 715         /*
 716          * We expect this value to be non-zero when generic Block Layer
 717          * Discard supported is detected iblock_create_virtdevice().
 718          */
 719         if (flag && !da->max_unmap_block_desc_count) {
 720                 pr_err("Generic Block Discard not supported\n");
 721                 return -ENOSYS;
 722         }
 723
 724         da->emulate_tpws = flag;
 725         pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
 726                                 da->da_dev, flag);
 727         return count;
 728 }
 729
 730 static ssize_t store_pi_prot_type(struct se_dev_attrib *da,
 731                 const char *page, size_t count)
 732 {
 733         int old_prot = da->pi_prot_type, ret;
 734         struct se_device *dev = da->da_dev;
 735         u32 flag;
 736
 737         ret = kstrtou32(page, 0, &flag);
 738         if (ret < 0)
 739                 return ret;
 740
 741         if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
 742                 pr_err("Illegal value %d for pi_prot_type\n", flag);
 743                 return -EINVAL;
 744         }
 745         if (flag == 2) {
 746                 pr_err("DIF TYPE2 protection currently not supported\n");
 747                 return -ENOSYS;
 748         }
 749         if (da->hw_pi_prot_type) {
 750                 pr_warn("DIF protection enabled on underlying hardware,"
 751                         " ignoring\n");
 752                 return count;
 753         }
 754         if (!dev->transport->init_prot || !dev->transport->free_prot) {
 755                 /* 0 is only allowed value for non-supporting backends */
 756                 if (flag == 0)
 757                         return count;
 758
 759                 pr_err("DIF protection not supported by backend: %s\n",
 760                        dev->transport->name);
 761                 return -ENOSYS;
 762         }
 763         if (!(dev->dev_flags & DF_CONFIGURED)) {
 764                 pr_err("DIF protection requires device to be configured\n");
 765                 return -ENODEV;
 766         }
 767         if (dev->export_count) {
 768                 pr_err("dev[%p]: Unable to change SE Device PROT type while"
 769                        " export_count is %d\n", dev, dev->export_count);
 770                 return -EINVAL;
 771         }
 772
 773         da->pi_prot_type = flag;
 774
 775         if (flag && !old_prot) {
 776                 ret = dev->transport->init_prot(dev);
 777                 if (ret) {
 778                         da->pi_prot_type = old_prot;
 779                         return ret;
 780                 }
 781
 782         } else if (!flag && old_prot) {
 783                 dev->transport->free_prot(dev);
 784         }
 785
 786         pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
 787         return count;
 788 }
 789
 790 static ssize_t store_pi_prot_format(struct se_dev_attrib *da,
 791                 const char *page, size_t count)
 792 {
 793         struct se_device *dev = da->da_dev;
 794         bool flag;
 795         int ret;
 796
 797         ret = strtobool(page, &flag);
 798         if (ret < 0)
 799                 return ret;
 800
 801         if (!flag)
 802                 return count;
 803
 804         if (!dev->transport->format_prot) {
 805                 pr_err("DIF protection format not supported by backend %s\n",
 806                        dev->transport->name);
 807                 return -ENOSYS;
 808         }
 809         if (!(dev->dev_flags & DF_CONFIGURED)) {
 810                 pr_err("DIF protection format requires device to be configured\n");
 811                 return -ENODEV;
 812         }
 813         if (dev->export_count) {
 814                 pr_err("dev[%p]: Unable to format SE Device PROT type while"
 815                        " export_count is %d\n", dev, dev->export_count);
 816                 return -EINVAL;
 817         }
 818
 819         ret = dev->transport->format_prot(dev);
 820         if (ret)
 821                 return ret;
 822
 823         pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
 824         return count;
 825 }
 826
 827 static ssize_t store_force_pr_aptpl(struct se_dev_attrib *da,
 828                 const char *page, size_t count)
 829 {
 830         bool flag;
 831         int ret;
 832
 833         ret = strtobool(page, &flag);
 834         if (ret < 0)
 835                 return ret;
 836         if (da->da_dev->export_count) {
 837                 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
 838                        " export_count is %d\n",
 839                        da->da_dev, da->da_dev->export_count);
 840                 return -EINVAL;
 841         }
 842
 843         da->force_pr_aptpl = flag;
 844         pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag);
 845         return count;
 846 }
 847
 848 static ssize_t store_emulate_rest_reord(struct se_dev_attrib *da,
 849                 const char *page, size_t count)
 850 {
 851         bool flag;
 852         int ret;
 853
 854         ret = strtobool(page, &flag);
 855         if (ret < 0)
 856                 return ret;
 857
 858         if (flag != 0) {
 859                 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted"
 860                         " reordering not implemented\n", da->da_dev);
 861                 return -ENOSYS;
 862         }
 863         da->emulate_rest_reord = flag;
 864         pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
 865                 da->da_dev, flag);
 866         return count;
 867 }
 868
 869 /*
 870  * Note, this can only be called on unexported SE Device Object.
 871  */
 872 static ssize_t store_queue_depth(struct se_dev_attrib *da,
 873                 const char *page, size_t count)
 874 {
 875         struct se_device *dev = da->da_dev;
 876         u32 val;
 877         int ret;
 878
 879         ret = kstrtou32(page, 0, &val);
 880         if (ret < 0)
 881                 return ret;
 882
 883         if (dev->export_count) {
 884                 pr_err("dev[%p]: Unable to change SE Device TCQ while"
 885                         " export_count is %d\n",
 886                         dev, dev->export_count);
 887                 return -EINVAL;
 888         }
 889         if (!val) {
 890                 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
 891                 return -EINVAL;
 892         }
 893
 894         if (val > dev->dev_attrib.queue_depth) {
 895                 if (val > dev->dev_attrib.hw_queue_depth) {
 896                         pr_err("dev[%p]: Passed queue_depth:"
 897                                 " %u exceeds TCM/SE_Device MAX"
 898                                 " TCQ: %u\n", dev, val,
 899                                 dev->dev_attrib.hw_queue_depth);
 900                         return -EINVAL;
 901                 }
 902         }
 903         da->queue_depth = dev->queue_depth = val;
 904         pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val);
 905         return count;
 906 }
 907
 908 static ssize_t store_optimal_sectors(struct se_dev_attrib *da,
 909                 const char *page, size_t count)
 910 {
 911         u32 val;
 912         int ret;
 913
 914         ret = kstrtou32(page, 0, &val);
 915         if (ret < 0)
 916                 return ret;
 917
 918         if (da->da_dev->export_count) {
 919                 pr_err("dev[%p]: Unable to change SE Device"
 920                         " optimal_sectors while export_count is %d\n",
 921                         da->da_dev, da->da_dev->export_count);
 922                 return -EINVAL;
 923         }
 924         if (val > da->hw_max_sectors) {
 925                 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
 926                         " greater than hw_max_sectors: %u\n",
 927                         da->da_dev, val, da->hw_max_sectors);
 928                 return -EINVAL;
 929         }
 930
 931         da->optimal_sectors = val;
 932         pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
 933                         da->da_dev, val);
 934         return count;
 935 }
 936
 937 static ssize_t store_block_size(struct se_dev_attrib *da,
 938                 const char *page, size_t count)
 939 {
 940         u32 val;
 941         int ret;
 942
 943         ret = kstrtou32(page, 0, &val);
 944         if (ret < 0)
 945                 return ret;
 946
 947         if (da->da_dev->export_count) {
 948                 pr_err("dev[%p]: Unable to change SE Device block_size"
 949                         " while export_count is %d\n",
 950                         da->da_dev, da->da_dev->export_count);
 951                 return -EINVAL;
 952         }
 953
 954         if (val != 512 && val != 1024 && val != 2048 && val != 4096) {
 955                 pr_err("dev[%p]: Illegal value for block_device: %u"
 956                         " for SE device, must be 512, 1024, 2048 or 4096\n",
 957                         da->da_dev, val);
 958                 return -EINVAL;
 959         }
 960
 961         da->block_size = val;
 962         if (da->max_bytes_per_io)
 963                 da->hw_max_sectors = da->max_bytes_per_io / val;
 964
 965         pr_debug("dev[%p]: SE Device block_size changed to %u\n",
 966                         da->da_dev, val);
 967         return count;
 968 }
 969
 970 CONFIGFS_EATTR_STRUCT(target_backend_dev_attrib, se_dev_attrib);
 971 #define TB_DEV_ATTR(_backend, _name, _mode)                             \
 972 static struct target_backend_dev_attrib_attribute _backend##_dev_attrib_##_name = \
 973         __CONFIGFS_EATTR(_name, _mode,                                  \
 974         show_##_name,                                                   \
 975         store_##_name);
 976
 977 #define TB_DEV_ATTR_RO(_backend, _name)                                 \
 978 static struct target_backend_dev_attrib_attribute _backend##_dev_attrib_##_name = \
 979         __CONFIGFS_EATTR_RO(_name,                                      \
 980         show_##_name);
 981
 982 TB_DEV_ATTR(target_core, emulate_model_alias, S_IRUGO | S_IWUSR);
 983 TB_DEV_ATTR(target_core, emulate_dpo, S_IRUGO | S_IWUSR);
 984 TB_DEV_ATTR(target_core, emulate_fua_write, S_IRUGO | S_IWUSR);
 985 TB_DEV_ATTR(target_core, emulate_fua_read, S_IRUGO | S_IWUSR);
 986 TB_DEV_ATTR(target_core, emulate_write_cache, S_IRUGO | S_IWUSR);
 987 TB_DEV_ATTR(target_core, emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
 988 TB_DEV_ATTR(target_core, emulate_tas, S_IRUGO | S_IWUSR);
 989 TB_DEV_ATTR(target_core, emulate_tpu, S_IRUGO | S_IWUSR);
 990 TB_DEV_ATTR(target_core, emulate_tpws, S_IRUGO | S_IWUSR);
 991 TB_DEV_ATTR(target_core, emulate_caw, S_IRUGO | S_IWUSR);
 992 TB_DEV_ATTR(target_core, emulate_3pc, S_IRUGO | S_IWUSR);
 993 TB_DEV_ATTR(target_core, pi_prot_type, S_IRUGO | S_IWUSR);
 994 TB_DEV_ATTR_RO(target_core, hw_pi_prot_type);
 995 TB_DEV_ATTR(target_core, pi_prot_format, S_IRUGO | S_IWUSR);
 996 TB_DEV_ATTR(target_core, enforce_pr_isids, S_IRUGO | S_IWUSR);
 997 TB_DEV_ATTR(target_core, is_nonrot, S_IRUGO | S_IWUSR);
 998 TB_DEV_ATTR(target_core, emulate_rest_reord, S_IRUGO | S_IWUSR);
 999 TB_DEV_ATTR(target_core, force_pr_aptpl, S_IRUGO | S_IWUSR)
1000 TB_DEV_ATTR_RO(target_core, hw_block_size);
1001 TB_DEV_ATTR(target_core, block_size, S_IRUGO | S_IWUSR)
1002 TB_DEV_ATTR_RO(target_core, hw_max_sectors);
1003 TB_DEV_ATTR(target_core, optimal_sectors, S_IRUGO | S_IWUSR);
1004 TB_DEV_ATTR_RO(target_core, hw_queue_depth);
1005 TB_DEV_ATTR(target_core, queue_depth, S_IRUGO | S_IWUSR);
1006 TB_DEV_ATTR(target_core, max_unmap_lba_count, S_IRUGO | S_IWUSR);
1007 TB_DEV_ATTR(target_core, max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
1008 TB_DEV_ATTR(target_core, unmap_granularity, S_IRUGO | S_IWUSR);
1009 TB_DEV_ATTR(target_core, unmap_granularity_alignment, S_IRUGO | S_IWUSR);
1010 TB_DEV_ATTR(target_core, max_write_same_len, S_IRUGO | S_IWUSR);
1011
1012 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
1013 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
1014
1015 /*
1016  * dev_attrib attributes for devices using the target core SBC/SPC
1017  * interpreter.  Any backend using spc_parse_cdb should be using
1018  * these.
1019  */
1020 struct configfs_attribute *sbc_attrib_attrs[] = {
1021         &target_core_dev_attrib_emulate_model_alias.attr,
1022         &target_core_dev_attrib_emulate_dpo.attr,
1023         &target_core_dev_attrib_emulate_fua_write.attr,
1024         &target_core_dev_attrib_emulate_fua_read.attr,
1025         &target_core_dev_attrib_emulate_write_cache.attr,
1026         &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
1027         &target_core_dev_attrib_emulate_tas.attr,
1028         &target_core_dev_attrib_emulate_tpu.attr,
1029         &target_core_dev_attrib_emulate_tpws.attr,
1030         &target_core_dev_attrib_emulate_caw.attr,
1031         &target_core_dev_attrib_emulate_3pc.attr,
1032         &target_core_dev_attrib_pi_prot_type.attr,
1033         &target_core_dev_attrib_hw_pi_prot_type.attr,
1034         &target_core_dev_attrib_pi_prot_format.attr,
1035         &target_core_dev_attrib_enforce_pr_isids.attr,
1036         &target_core_dev_attrib_is_nonrot.attr,
1037         &target_core_dev_attrib_emulate_rest_reord.attr,
1038         &target_core_dev_attrib_force_pr_aptpl.attr,
1039         &target_core_dev_attrib_hw_block_size.attr,
1040         &target_core_dev_attrib_block_size.attr,
1041         &target_core_dev_attrib_hw_max_sectors.attr,
1042         &target_core_dev_attrib_optimal_sectors.attr,
1043         &target_core_dev_attrib_hw_queue_depth.attr,
1044         &target_core_dev_attrib_queue_depth.attr,
1045         &target_core_dev_attrib_max_unmap_lba_count.attr,
1046         &target_core_dev_attrib_max_unmap_block_desc_count.attr,
1047         &target_core_dev_attrib_unmap_granularity.attr,
1048         &target_core_dev_attrib_unmap_granularity_alignment.attr,
1049         &target_core_dev_attrib_max_write_same_len.attr,
1050         NULL,
1051 };
1052 EXPORT_SYMBOL(sbc_attrib_attrs);
1053
1054 TB_DEV_ATTR_RO(target_pt, hw_pi_prot_type);
1055 TB_DEV_ATTR_RO(target_pt, hw_block_size);
1056 TB_DEV_ATTR_RO(target_pt, hw_max_sectors);
1057 TB_DEV_ATTR_RO(target_pt, hw_queue_depth);
1058
1059 /*
1060  * Minimal dev_attrib attributes for devices passing through CDBs.
1061  * In this case we only provide a few read-only attributes for
1062  * backwards compatibility.
1063  */
1064 struct configfs_attribute *passthrough_attrib_attrs[] = {
1065         &target_pt_dev_attrib_hw_pi_prot_type.attr,
1066         &target_pt_dev_attrib_hw_block_size.attr,
1067         &target_pt_dev_attrib_hw_max_sectors.attr,
1068         &target_pt_dev_attrib_hw_queue_depth.attr,
1069         NULL,
1070 };
1071 EXPORT_SYMBOL(passthrough_attrib_attrs);
1072
1073 static struct configfs_item_operations target_core_dev_attrib_ops = {
1074         .show_attribute         = target_core_dev_attrib_attr_show,
1075         .store_attribute        = target_core_dev_attrib_attr_store,
1076 };
1077
1078 TB_CIT_SETUP_DRV(dev_attrib, &target_core_dev_attrib_ops, NULL);
1079
1080 /* End functions for struct config_item_type tb_dev_attrib_cit */
1081
1082 /*  Start functions for struct config_item_type tb_dev_wwn_cit */
1083
1084 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
1085 #define SE_DEV_WWN_ATTR(_name, _mode)                                   \
1086 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
1087                 __CONFIGFS_EATTR(_name, _mode,                          \
1088                 target_core_dev_wwn_show_attr_##_name,                  \
1089                 target_core_dev_wwn_store_attr_##_name);
1090
1091 #define SE_DEV_WWN_ATTR_RO(_name);                                      \
1092 do {                                                                    \
1093         static struct target_core_dev_wwn_attribute                     \
1094                         target_core_dev_wwn_##_name =                   \
1095                 __CONFIGFS_EATTR_RO(_name,                              \
1096                 target_core_dev_wwn_show_attr_##_name);                 \
1097 } while (0);
1098
1099 /*
1100  * VPD page 0x80 Unit serial
1101  */
1102 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
1103         struct t10_wwn *t10_wwn,
1104         char *page)
1105 {
1106         return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1107                 &t10_wwn->unit_serial[0]);
1108 }
1109
1110 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
1111         struct t10_wwn *t10_wwn,
1112         const char *page,
1113         size_t count)
1114 {
1115         struct se_device *dev = t10_wwn->t10_dev;
1116         unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
1117
1118         /*
1119          * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1120          * from the struct scsi_device level firmware, do not allow
1121          * VPD Unit Serial to be emulated.
1122          *
1123          * Note this struct scsi_device could also be emulating VPD
1124          * information from its drivers/scsi LLD.  But for now we assume
1125          * it is doing 'the right thing' wrt a world wide unique
1126          * VPD Unit Serial Number that OS dependent multipath can depend on.
1127          */
1128         if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
1129                 pr_err("Underlying SCSI device firmware provided VPD"
1130                         " Unit Serial, ignoring request\n");
1131                 return -EOPNOTSUPP;
1132         }
1133
1134         if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
1135                 pr_err("Emulated VPD Unit Serial exceeds"
1136                 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1137                 return -EOVERFLOW;
1138         }
1139         /*
1140          * Check to see if any active $FABRIC_MOD exports exist.  If they
1141          * do exist, fail here as changing this information on the fly
1142          * (underneath the initiator side OS dependent multipath code)
1143          * could cause negative effects.
1144          */
1145         if (dev->export_count) {
1146                 pr_err("Unable to set VPD Unit Serial while"
1147                         " active %d $FABRIC_MOD exports exist\n",
1148                         dev->export_count);
1149                 return -EINVAL;
1150         }
1151
1152         /*
1153          * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1154          *
1155          * Also, strip any newline added from the userspace
1156          * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1157          */
1158         memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
1159         snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
1160         snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
1161                         "%s", strstrip(buf));
1162         dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
1163
1164         pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1165                         " %s\n", dev->t10_wwn.unit_serial);
1166
1167         return count;
1168 }
1169
1170 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
1171
1172 /*
1173  * VPD page 0x83 Protocol Identifier
1174  */
1175 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
1176         struct t10_wwn *t10_wwn,
1177         char *page)
1178 {
1179         struct t10_vpd *vpd;
1180         unsigned char buf[VPD_TMP_BUF_SIZE];
1181         ssize_t len = 0;
1182
1183         memset(buf, 0, VPD_TMP_BUF_SIZE);
1184
1185         spin_lock(&t10_wwn->t10_vpd_lock);
1186         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
1187                 if (!vpd->protocol_identifier_set)
1188                         continue;
1189
1190                 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1191
1192                 if (len + strlen(buf) >= PAGE_SIZE)
1193                         break;
1194
1195                 len += sprintf(page+len, "%s", buf);
1196         }
1197         spin_unlock(&t10_wwn->t10_vpd_lock);
1198
1199         return len;
1200 }
1201
1202 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
1203         struct t10_wwn *t10_wwn,
1204         const char *page,
1205         size_t count)
1206 {
1207         return -ENOSYS;
1208 }
1209
1210 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
1211
1212 /*
1213  * Generic wrapper for dumping VPD identifiers by association.
1214  */
1215 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc)                           \
1216 static ssize_t target_core_dev_wwn_show_attr_##_name(                   \
1217         struct t10_wwn *t10_wwn,                                        \
1218         char *page)                                                     \
1219 {                                                                       \
1220         struct t10_vpd *vpd;                                                    \
1221         unsigned char buf[VPD_TMP_BUF_SIZE];                            \
1222         ssize_t len = 0;                                                \
1223                                                                         \
1224         spin_lock(&t10_wwn->t10_vpd_lock);                              \
1225         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {    \
1226                 if (vpd->association != _assoc)                         \
1227                         continue;                                       \
1228                                                                         \
1229                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
1230                 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE);   \
1231                 if (len + strlen(buf) >= PAGE_SIZE)                     \
1232                         break;                                          \
1233                 len += sprintf(page+len, "%s", buf);                    \
1234                                                                         \
1235                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
1236                 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1237                 if (len + strlen(buf) >= PAGE_SIZE)                     \
1238                         break;                                          \
1239                 len += sprintf(page+len, "%s", buf);                    \
1240                                                                         \
1241                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
1242                 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1243                 if (len + strlen(buf) >= PAGE_SIZE)                     \
1244                         break;                                          \
1245                 len += sprintf(page+len, "%s", buf);                    \
1246         }                                                               \
1247         spin_unlock(&t10_wwn->t10_vpd_lock);                            \
1248                                                                         \
1249         return len;                                                     \
1250 }
1251
1252 /*
1253  * VPD page 0x83 Association: Logical Unit
1254  */
1255 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1256
1257 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
1258         struct t10_wwn *t10_wwn,
1259         const char *page,
1260         size_t count)
1261 {
1262         return -ENOSYS;
1263 }
1264
1265 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
1266
1267 /*
1268  * VPD page 0x83 Association: Target Port
1269  */
1270 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1271
1272 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
1273         struct t10_wwn *t10_wwn,
1274         const char *page,
1275         size_t count)
1276 {
1277         return -ENOSYS;
1278 }
1279
1280 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
1281
1282 /*
1283  * VPD page 0x83 Association: SCSI Target Device
1284  */
1285 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1286
1287 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
1288         struct t10_wwn *t10_wwn,
1289         const char *page,
1290         size_t count)
1291 {
1292         return -ENOSYS;
1293 }
1294
1295 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
1296
1297 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
1298
1299 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1300         &target_core_dev_wwn_vpd_unit_serial.attr,
1301         &target_core_dev_wwn_vpd_protocol_identifier.attr,
1302         &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
1303         &target_core_dev_wwn_vpd_assoc_target_port.attr,
1304         &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
1305         NULL,
1306 };
1307
1308 static struct configfs_item_operations target_core_dev_wwn_ops = {
1309         .show_attribute         = target_core_dev_wwn_attr_show,
1310         .store_attribute        = target_core_dev_wwn_attr_store,
1311 };
1312
1313 TB_CIT_SETUP(dev_wwn, &target_core_dev_wwn_ops, NULL, target_core_dev_wwn_attrs);
1314
1315 /*  End functions for struct config_item_type tb_dev_wwn_cit */
1316
1317 /*  Start functions for struct config_item_type tb_dev_pr_cit */
1318
1319 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
1320 #define SE_DEV_PR_ATTR(_name, _mode)                                    \
1321 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1322         __CONFIGFS_EATTR(_name, _mode,                                  \
1323         target_core_dev_pr_show_attr_##_name,                           \
1324         target_core_dev_pr_store_attr_##_name);
1325
1326 #define SE_DEV_PR_ATTR_RO(_name);                                       \
1327 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1328         __CONFIGFS_EATTR_RO(_name,                                      \
1329         target_core_dev_pr_show_attr_##_name);
1330
1331 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1332                 char *page)
1333 {
1334         struct se_node_acl *se_nacl;
1335         struct t10_pr_registration *pr_reg;
1336         char i_buf[PR_REG_ISID_ID_LEN];
1337
1338         memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1339
1340         pr_reg = dev->dev_pr_res_holder;
1341         if (!pr_reg)
1342                 return sprintf(page, "No SPC-3 Reservation holder\n");
1343
1344         se_nacl = pr_reg->pr_reg_nacl;
1345         core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1346
1347         return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1348                 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1349                 se_nacl->initiatorname, i_buf);
1350 }
1351
1352 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1353                 char *page)
1354 {
1355         struct se_node_acl *se_nacl;
1356         ssize_t len;
1357
1358         se_nacl = dev->dev_reserved_node_acl;
1359         if (se_nacl) {
1360                 len = sprintf(page,
1361                               "SPC-2 Reservation: %s Initiator: %s\n",
1362                               se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1363                               se_nacl->initiatorname);
1364         } else {
1365                 len = sprintf(page, "No SPC-2 Reservation holder\n");
1366         }
1367         return len;
1368 }
1369
1370 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
1371                 char *page)
1372 {
1373         int ret;
1374
1375         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1376                 return sprintf(page, "Passthrough\n");
1377
1378         spin_lock(&dev->dev_reservation_lock);
1379         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1380                 ret = target_core_dev_pr_show_spc2_res(dev, page);
1381         else
1382                 ret = target_core_dev_pr_show_spc3_res(dev, page);
1383         spin_unlock(&dev->dev_reservation_lock);
1384         return ret;
1385 }
1386
1387 SE_DEV_PR_ATTR_RO(res_holder);
1388
1389 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1390                 struct se_device *dev, char *page)
1391 {
1392         ssize_t len = 0;
1393
1394         spin_lock(&dev->dev_reservation_lock);
1395         if (!dev->dev_pr_res_holder) {
1396                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1397         } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1398                 len = sprintf(page, "SPC-3 Reservation: All Target"
1399                         " Ports registration\n");
1400         } else {
1401                 len = sprintf(page, "SPC-3 Reservation: Single"
1402                         " Target Port registration\n");
1403         }
1404
1405         spin_unlock(&dev->dev_reservation_lock);
1406         return len;
1407 }
1408
1409 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1410
1411 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1412                 struct se_device *dev, char *page)
1413 {
1414         return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
1415 }
1416
1417 SE_DEV_PR_ATTR_RO(res_pr_generation);
1418
1419 /*
1420  * res_pr_holder_tg_port
1421  */
1422 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1423                 struct se_device *dev, char *page)
1424 {
1425         struct se_node_acl *se_nacl;
1426         struct se_portal_group *se_tpg;
1427         struct t10_pr_registration *pr_reg;
1428         const struct target_core_fabric_ops *tfo;
1429         ssize_t len = 0;
1430
1431         spin_lock(&dev->dev_reservation_lock);
1432         pr_reg = dev->dev_pr_res_holder;
1433         if (!pr_reg) {
1434                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1435                 goto out_unlock;
1436         }
1437
1438         se_nacl = pr_reg->pr_reg_nacl;
1439         se_tpg = se_nacl->se_tpg;
1440         tfo = se_tpg->se_tpg_tfo;
1441
1442         len += sprintf(page+len, "SPC-3 Reservation: %s"
1443                 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1444                 tfo->tpg_get_wwn(se_tpg));
1445         len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1446                 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1447                 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
1448                 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1449                 tfo->get_fabric_name(), pr_reg->pr_aptpl_target_lun);
1450
1451 out_unlock:
1452         spin_unlock(&dev->dev_reservation_lock);
1453         return len;
1454 }
1455
1456 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1457
1458 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1459                 struct se_device *dev, char *page)
1460 {
1461         const struct target_core_fabric_ops *tfo;
1462         struct t10_pr_registration *pr_reg;
1463         unsigned char buf[384];
1464         char i_buf[PR_REG_ISID_ID_LEN];
1465         ssize_t len = 0;
1466         int reg_count = 0;
1467
1468         len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1469
1470         spin_lock(&dev->t10_pr.registration_lock);
1471         list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1472                         pr_reg_list) {
1473
1474                 memset(buf, 0, 384);
1475                 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1476                 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1477                 core_pr_dump_initiator_port(pr_reg, i_buf,
1478                                         PR_REG_ISID_ID_LEN);
1479                 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1480                         tfo->get_fabric_name(),
1481                         pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1482                         pr_reg->pr_res_generation);
1483
1484                 if (len + strlen(buf) >= PAGE_SIZE)
1485                         break;
1486
1487                 len += sprintf(page+len, "%s", buf);
1488                 reg_count++;
1489         }
1490         spin_unlock(&dev->t10_pr.registration_lock);
1491
1492         if (!reg_count)
1493                 len += sprintf(page+len, "None\n");
1494
1495         return len;
1496 }
1497
1498 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1499
1500 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1501                 struct se_device *dev, char *page)
1502 {
1503         struct t10_pr_registration *pr_reg;
1504         ssize_t len = 0;
1505
1506         spin_lock(&dev->dev_reservation_lock);
1507         pr_reg = dev->dev_pr_res_holder;
1508         if (pr_reg) {
1509                 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1510                         core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1511         } else {
1512                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1513         }
1514
1515         spin_unlock(&dev->dev_reservation_lock);
1516         return len;
1517 }
1518
1519 SE_DEV_PR_ATTR_RO(res_pr_type);
1520
1521 static ssize_t target_core_dev_pr_show_attr_res_type(
1522                 struct se_device *dev, char *page)
1523 {
1524         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1525                 return sprintf(page, "SPC_PASSTHROUGH\n");
1526         else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1527                 return sprintf(page, "SPC2_RESERVATIONS\n");
1528         else
1529                 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1530 }
1531
1532 SE_DEV_PR_ATTR_RO(res_type);
1533
1534 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1535                 struct se_device *dev, char *page)
1536 {
1537         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1538                 return 0;
1539
1540         return sprintf(page, "APTPL Bit Status: %s\n",
1541                 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1542 }
1543
1544 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1545
1546 /*
1547  * res_aptpl_metadata
1548  */
1549 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1550                 struct se_device *dev, char *page)
1551 {
1552         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1553                 return 0;
1554
1555         return sprintf(page, "Ready to process PR APTPL metadata..\n");
1556 }
1557
1558 enum {
1559         Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1560         Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1561         Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1562         Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1563 };
1564
1565 static match_table_t tokens = {
1566         {Opt_initiator_fabric, "initiator_fabric=%s"},
1567         {Opt_initiator_node, "initiator_node=%s"},
1568         {Opt_initiator_sid, "initiator_sid=%s"},
1569         {Opt_sa_res_key, "sa_res_key=%s"},
1570         {Opt_res_holder, "res_holder=%d"},
1571         {Opt_res_type, "res_type=%d"},
1572         {Opt_res_scope, "res_scope=%d"},
1573         {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1574         {Opt_mapped_lun, "mapped_lun=%lld"},
1575         {Opt_target_fabric, "target_fabric=%s"},
1576         {Opt_target_node, "target_node=%s"},
1577         {Opt_tpgt, "tpgt=%d"},
1578         {Opt_port_rtpi, "port_rtpi=%d"},
1579         {Opt_target_lun, "target_lun=%lld"},
1580         {Opt_err, NULL}
1581 };
1582
1583 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1584         struct se_device *dev,
1585         const char *page,
1586         size_t count)
1587 {
1588         unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1589         unsigned char *t_fabric = NULL, *t_port = NULL;
1590         char *orig, *ptr, *opts;
1591         substring_t args[MAX_OPT_ARGS];
1592         unsigned long long tmp_ll;
1593         u64 sa_res_key = 0;
1594         u64 mapped_lun = 0, target_lun = 0;
1595         int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1596         u16 tpgt = 0;
1597         u8 type = 0;
1598
1599         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1600                 return count;
1601         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1602                 return count;
1603
1604         if (dev->export_count) {
1605                 pr_debug("Unable to process APTPL metadata while"
1606                         " active fabric exports exist\n");
1607                 return -EINVAL;
1608         }
1609
1610         opts = kstrdup(page, GFP_KERNEL);
1611         if (!opts)
1612                 return -ENOMEM;
1613
1614         orig = opts;
1615         while ((ptr = strsep(&opts, ",\n")) != NULL) {
1616                 if (!*ptr)
1617                         continue;
1618
1619                 token = match_token(ptr, tokens, args);
1620                 switch (token) {
1621                 case Opt_initiator_fabric:
1622                         i_fabric = match_strdup(args);
1623                         if (!i_fabric) {
1624                                 ret = -ENOMEM;
1625                                 goto out;
1626                         }
1627                         break;
1628                 case Opt_initiator_node:
1629                         i_port = match_strdup(args);
1630                         if (!i_port) {
1631                                 ret = -ENOMEM;
1632                                 goto out;
1633                         }
1634                         if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1635                                 pr_err("APTPL metadata initiator_node="
1636                                         " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1637                                         PR_APTPL_MAX_IPORT_LEN);
1638                                 ret = -EINVAL;
1639                                 break;
1640                         }
1641                         break;
1642                 case Opt_initiator_sid:
1643                         isid = match_strdup(args);
1644                         if (!isid) {
1645                                 ret = -ENOMEM;
1646                                 goto out;
1647                         }
1648                         if (strlen(isid) >= PR_REG_ISID_LEN) {
1649                                 pr_err("APTPL metadata initiator_isid"
1650                                         "= exceeds PR_REG_ISID_LEN: %d\n",
1651                                         PR_REG_ISID_LEN);
1652                                 ret = -EINVAL;
1653                                 break;
1654                         }
1655                         break;
1656                 case Opt_sa_res_key:
1657                         ret = kstrtoull(args->from, 0, &tmp_ll);
1658                         if (ret < 0) {
1659                                 pr_err("kstrtoull() failed for sa_res_key=\n");
1660                                 goto out;
1661                         }
1662                         sa_res_key = (u64)tmp_ll;
1663                         break;
1664                 /*
1665                  * PR APTPL Metadata for Reservation
1666                  */
1667                 case Opt_res_holder:
1668                         ret = match_int(args, &arg);
1669                         if (ret)
1670                                 goto out;
1671                         res_holder = arg;
1672                         break;
1673                 case Opt_res_type:
1674                         ret = match_int(args, &arg);
1675                         if (ret)
1676                                 goto out;
1677                         type = (u8)arg;
1678                         break;
1679                 case Opt_res_scope:
1680                         ret = match_int(args, &arg);
1681                         if (ret)
1682                                 goto out;
1683                         break;
1684                 case Opt_res_all_tg_pt:
1685                         ret = match_int(args, &arg);
1686                         if (ret)
1687                                 goto out;
1688                         all_tg_pt = (int)arg;
1689                         break;
1690                 case Opt_mapped_lun:
1691                         ret = match_int(args, &arg);
1692                         if (ret)
1693                                 goto out;
1694                         mapped_lun = (u64)arg;
1695                         break;
1696                 /*
1697                  * PR APTPL Metadata for Target Port
1698                  */
1699                 case Opt_target_fabric:
1700                         t_fabric = match_strdup(args);
1701                         if (!t_fabric) {
1702                                 ret = -ENOMEM;
1703                                 goto out;
1704                         }
1705                         break;
1706                 case Opt_target_node:
1707                         t_port = match_strdup(args);
1708                         if (!t_port) {
1709                                 ret = -ENOMEM;
1710                                 goto out;
1711                         }
1712                         if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1713                                 pr_err("APTPL metadata target_node="
1714                                         " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1715                                         PR_APTPL_MAX_TPORT_LEN);
1716                                 ret = -EINVAL;
1717                                 break;
1718                         }
1719                         break;
1720                 case Opt_tpgt:
1721                         ret = match_int(args, &arg);
1722                         if (ret)
1723                                 goto out;
1724                         tpgt = (u16)arg;
1725                         break;
1726                 case Opt_port_rtpi:
1727                         ret = match_int(args, &arg);
1728                         if (ret)
1729                                 goto out;
1730                         break;
1731                 case Opt_target_lun:
1732                         ret = match_int(args, &arg);
1733                         if (ret)
1734                                 goto out;
1735                         target_lun = (u64)arg;
1736                         break;
1737                 default:
1738                         break;
1739                 }
1740         }
1741
1742         if (!i_port || !t_port || !sa_res_key) {
1743                 pr_err("Illegal parameters for APTPL registration\n");
1744                 ret = -EINVAL;
1745                 goto out;
1746         }
1747
1748         if (res_holder && !(type)) {
1749                 pr_err("Illegal PR type: 0x%02x for reservation"
1750                                 " holder\n", type);
1751                 ret = -EINVAL;
1752                 goto out;
1753         }
1754
1755         ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1756                         i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1757                         res_holder, all_tg_pt, type);
1758 out:
1759         kfree(i_fabric);
1760         kfree(i_port);
1761         kfree(isid);
1762         kfree(t_fabric);
1763         kfree(t_port);
1764         kfree(orig);
1765         return (ret == 0) ? count : ret;
1766 }
1767
1768 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1769
1770 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
1771
1772 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1773         &target_core_dev_pr_res_holder.attr,
1774         &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1775         &target_core_dev_pr_res_pr_generation.attr,
1776         &target_core_dev_pr_res_pr_holder_tg_port.attr,
1777         &target_core_dev_pr_res_pr_registered_i_pts.attr,
1778         &target_core_dev_pr_res_pr_type.attr,
1779         &target_core_dev_pr_res_type.attr,
1780         &target_core_dev_pr_res_aptpl_active.attr,
1781         &target_core_dev_pr_res_aptpl_metadata.attr,
1782         NULL,
1783 };
1784
1785 static struct configfs_item_operations target_core_dev_pr_ops = {
1786         .show_attribute         = target_core_dev_pr_attr_show,
1787         .store_attribute        = target_core_dev_pr_attr_store,
1788 };
1789
1790 TB_CIT_SETUP(dev_pr, &target_core_dev_pr_ops, NULL, target_core_dev_pr_attrs);
1791
1792 /*  End functions for struct config_item_type tb_dev_pr_cit */
1793
1794 /*  Start functions for struct config_item_type tb_dev_cit */
1795
1796 static ssize_t target_core_show_dev_info(void *p, char *page)
1797 {
1798         struct se_device *dev = p;
1799         int bl = 0;
1800         ssize_t read_bytes = 0;
1801
1802         transport_dump_dev_state(dev, page, &bl);
1803         read_bytes += bl;
1804         read_bytes += dev->transport->show_configfs_dev_params(dev,
1805                         page+read_bytes);
1806         return read_bytes;
1807 }
1808
1809 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1810         .attr   = { .ca_owner = THIS_MODULE,
1811                     .ca_name = "info",
1812                     .ca_mode = S_IRUGO },
1813         .show   = target_core_show_dev_info,
1814         .store  = NULL,
1815 };
1816
1817 static ssize_t target_core_store_dev_control(
1818         void *p,
1819         const char *page,
1820         size_t count)
1821 {
1822         struct se_device *dev = p;
1823
1824         return dev->transport->set_configfs_dev_params(dev, page, count);
1825 }
1826
1827 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1828         .attr   = { .ca_owner = THIS_MODULE,
1829                     .ca_name = "control",
1830                     .ca_mode = S_IWUSR },
1831         .show   = NULL,
1832         .store  = target_core_store_dev_control,
1833 };
1834
1835 static ssize_t target_core_show_dev_alias(void *p, char *page)
1836 {
1837         struct se_device *dev = p;
1838
1839         if (!(dev->dev_flags & DF_USING_ALIAS))
1840                 return 0;
1841
1842         return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1843 }
1844
1845 static ssize_t target_core_store_dev_alias(
1846         void *p,
1847         const char *page,
1848         size_t count)
1849 {
1850         struct se_device *dev = p;
1851         struct se_hba *hba = dev->se_hba;
1852         ssize_t read_bytes;
1853
1854         if (count > (SE_DEV_ALIAS_LEN-1)) {
1855                 pr_err("alias count: %d exceeds"
1856                         " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1857                         SE_DEV_ALIAS_LEN-1);
1858                 return -EINVAL;
1859         }
1860
1861         read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1862         if (!read_bytes)
1863                 return -EINVAL;
1864         if (dev->dev_alias[read_bytes - 1] == '\n')
1865                 dev->dev_alias[read_bytes - 1] = '\0';
1866
1867         dev->dev_flags |= DF_USING_ALIAS;
1868
1869         pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1870                 config_item_name(&hba->hba_group.cg_item),
1871                 config_item_name(&dev->dev_group.cg_item),
1872                 dev->dev_alias);
1873
1874         return read_bytes;
1875 }
1876
1877 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1878         .attr   = { .ca_owner = THIS_MODULE,
1879                     .ca_name = "alias",
1880                     .ca_mode =  S_IRUGO | S_IWUSR },
1881         .show   = target_core_show_dev_alias,
1882         .store  = target_core_store_dev_alias,
1883 };
1884
1885 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1886 {
1887         struct se_device *dev = p;
1888
1889         if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1890                 return 0;
1891
1892         return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1893 }
1894
1895 static ssize_t target_core_store_dev_udev_path(
1896         void *p,
1897         const char *page,
1898         size_t count)
1899 {
1900         struct se_device *dev = p;
1901         struct se_hba *hba = dev->se_hba;
1902         ssize_t read_bytes;
1903
1904         if (count > (SE_UDEV_PATH_LEN-1)) {
1905                 pr_err("udev_path count: %d exceeds"
1906                         " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1907                         SE_UDEV_PATH_LEN-1);
1908                 return -EINVAL;
1909         }
1910
1911         read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1912                         "%s", page);
1913         if (!read_bytes)
1914                 return -EINVAL;
1915         if (dev->udev_path[read_bytes - 1] == '\n')
1916                 dev->udev_path[read_bytes - 1] = '\0';
1917
1918         dev->dev_flags |= DF_USING_UDEV_PATH;
1919
1920         pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1921                 config_item_name(&hba->hba_group.cg_item),
1922                 config_item_name(&dev->dev_group.cg_item),
1923                 dev->udev_path);
1924
1925         return read_bytes;
1926 }
1927
1928 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1929         .attr   = { .ca_owner = THIS_MODULE,
1930                     .ca_name = "udev_path",
1931                     .ca_mode =  S_IRUGO | S_IWUSR },
1932         .show   = target_core_show_dev_udev_path,
1933         .store  = target_core_store_dev_udev_path,
1934 };
1935
1936 static ssize_t target_core_show_dev_enable(void *p, char *page)
1937 {
1938         struct se_device *dev = p;
1939
1940         return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1941 }
1942
1943 static ssize_t target_core_store_dev_enable(
1944         void *p,
1945         const char *page,
1946         size_t count)
1947 {
1948         struct se_device *dev = p;
1949         char *ptr;
1950         int ret;
1951
1952         ptr = strstr(page, "1");
1953         if (!ptr) {
1954                 pr_err("For dev_enable ops, only valid value"
1955                                 " is \"1\"\n");
1956                 return -EINVAL;
1957         }
1958
1959         ret = target_configure_device(dev);
1960         if (ret)
1961                 return ret;
1962         return count;
1963 }
1964
1965 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1966         .attr   = { .ca_owner = THIS_MODULE,
1967                     .ca_name = "enable",
1968                     .ca_mode =  S_IRUGO | S_IWUSR },
1969         .show   = target_core_show_dev_enable,
1970         .store  = target_core_store_dev_enable,
1971 };
1972
1973 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1974 {
1975         struct se_device *dev = p;
1976         struct config_item *lu_ci;
1977         struct t10_alua_lu_gp *lu_gp;
1978         struct t10_alua_lu_gp_member *lu_gp_mem;
1979         ssize_t len = 0;
1980
1981         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1982         if (!lu_gp_mem)
1983                 return 0;
1984
1985         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1986         lu_gp = lu_gp_mem->lu_gp;
1987         if (lu_gp) {
1988                 lu_ci = &lu_gp->lu_gp_group.cg_item;
1989                 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1990                         config_item_name(lu_ci), lu_gp->lu_gp_id);
1991         }
1992         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1993
1994         return len;
1995 }
1996
1997 static ssize_t target_core_store_alua_lu_gp(
1998         void *p,
1999         const char *page,
2000         size_t count)
2001 {
2002         struct se_device *dev = p;
2003         struct se_hba *hba = dev->se_hba;
2004         struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
2005         struct t10_alua_lu_gp_member *lu_gp_mem;
2006         unsigned char buf[LU_GROUP_NAME_BUF];
2007         int move = 0;
2008
2009         lu_gp_mem = dev->dev_alua_lu_gp_mem;
2010         if (!lu_gp_mem)
2011                 return count;
2012
2013         if (count > LU_GROUP_NAME_BUF) {
2014                 pr_err("ALUA LU Group Alias too large!\n");
2015                 return -EINVAL;
2016         }
2017         memset(buf, 0, LU_GROUP_NAME_BUF);
2018         memcpy(buf, page, count);
2019         /*
2020          * Any ALUA logical unit alias besides "NULL" means we will be
2021          * making a new group association.
2022          */
2023         if (strcmp(strstrip(buf), "NULL")) {
2024                 /*
2025                  * core_alua_get_lu_gp_by_name() will increment reference to
2026                  * struct t10_alua_lu_gp.  This reference is released with
2027                  * core_alua_get_lu_gp_by_name below().
2028                  */
2029                 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
2030                 if (!lu_gp_new)
2031                         return -ENODEV;
2032         }
2033
2034         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2035         lu_gp = lu_gp_mem->lu_gp;
2036         if (lu_gp) {
2037                 /*
2038                  * Clearing an existing lu_gp association, and replacing
2039                  * with NULL
2040                  */
2041                 if (!lu_gp_new) {
2042                         pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
2043                                 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
2044                                 " %hu\n",
2045                                 config_item_name(&hba->hba_group.cg_item),
2046                                 config_item_name(&dev->dev_group.cg_item),
2047                                 config_item_name(&lu_gp->lu_gp_group.cg_item),
2048                                 lu_gp->lu_gp_id);
2049
2050                         __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2051                         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2052
2053                         return count;
2054                 }
2055                 /*
2056                  * Removing existing association of lu_gp_mem with lu_gp
2057                  */
2058                 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2059                 move = 1;
2060         }
2061         /*
2062          * Associate lu_gp_mem with lu_gp_new.
2063          */
2064         __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
2065         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2066
2067         pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
2068                 " core/alua/lu_gps/%s, ID: %hu\n",
2069                 (move) ? "Moving" : "Adding",
2070                 config_item_name(&hba->hba_group.cg_item),
2071                 config_item_name(&dev->dev_group.cg_item),
2072                 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
2073                 lu_gp_new->lu_gp_id);
2074
2075         core_alua_put_lu_gp_from_name(lu_gp_new);
2076         return count;
2077 }
2078
2079 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
2080         .attr   = { .ca_owner = THIS_MODULE,
2081                     .ca_name = "alua_lu_gp",
2082                     .ca_mode = S_IRUGO | S_IWUSR },
2083         .show   = target_core_show_alua_lu_gp,
2084         .store  = target_core_store_alua_lu_gp,
2085 };
2086
2087 static ssize_t target_core_show_dev_lba_map(void *p, char *page)
2088 {
2089         struct se_device *dev = p;
2090         struct t10_alua_lba_map *map;
2091         struct t10_alua_lba_map_member *mem;
2092         char *b = page;
2093         int bl = 0;
2094         char state;
2095
2096         spin_lock(&dev->t10_alua.lba_map_lock);
2097         if (!list_empty(&dev->t10_alua.lba_map_list))
2098             bl += sprintf(b + bl, "%u %u\n",
2099                           dev->t10_alua.lba_map_segment_size,
2100                           dev->t10_alua.lba_map_segment_multiplier);
2101         list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
2102                 bl += sprintf(b + bl, "%llu %llu",
2103                               map->lba_map_first_lba, map->lba_map_last_lba);
2104                 list_for_each_entry(mem, &map->lba_map_mem_list,
2105                                     lba_map_mem_list) {
2106                         switch (mem->lba_map_mem_alua_state) {
2107                         case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
2108                                 state = 'O';
2109                                 break;
2110                         case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
2111                                 state = 'A';
2112                                 break;
2113                         case ALUA_ACCESS_STATE_STANDBY:
2114                                 state = 'S';
2115                                 break;
2116                         case ALUA_ACCESS_STATE_UNAVAILABLE:
2117                                 state = 'U';
2118                                 break;
2119                         default:
2120                                 state = '.';
2121                                 break;
2122                         }
2123                         bl += sprintf(b + bl, " %d:%c",
2124                                       mem->lba_map_mem_alua_pg_id, state);
2125                 }
2126                 bl += sprintf(b + bl, "\n");
2127         }
2128         spin_unlock(&dev->t10_alua.lba_map_lock);
2129         return bl;
2130 }
2131
2132 static ssize_t target_core_store_dev_lba_map(
2133         void *p,
2134         const char *page,
2135         size_t count)
2136 {
2137         struct se_device *dev = p;
2138         struct t10_alua_lba_map *lba_map = NULL;
2139         struct list_head lba_list;
2140         char *map_entries, *ptr;
2141         char state;
2142         int pg_num = -1, pg;
2143         int ret = 0, num = 0, pg_id, alua_state;
2144         unsigned long start_lba = -1, end_lba = -1;
2145         unsigned long segment_size = -1, segment_mult = -1;
2146
2147         map_entries = kstrdup(page, GFP_KERNEL);
2148         if (!map_entries)
2149                 return -ENOMEM;
2150
2151         INIT_LIST_HEAD(&lba_list);
2152         while ((ptr = strsep(&map_entries, "\n")) != NULL) {
2153                 if (!*ptr)
2154                         continue;
2155
2156                 if (num == 0) {
2157                         if (sscanf(ptr, "%lu %lu\n",
2158                                    &segment_size, &segment_mult) != 2) {
2159                                 pr_err("Invalid line %d\n", num);
2160                                 ret = -EINVAL;
2161                                 break;
2162                         }
2163                         num++;
2164                         continue;
2165                 }
2166                 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2167                         pr_err("Invalid line %d\n", num);
2168                         ret = -EINVAL;
2169                         break;
2170                 }
2171                 ptr = strchr(ptr, ' ');
2172                 if (!ptr) {
2173                         pr_err("Invalid line %d, missing end lba\n", num);
2174                         ret = -EINVAL;
2175                         break;
2176                 }
2177                 ptr++;
2178                 ptr = strchr(ptr, ' ');
2179                 if (!ptr) {
2180                         pr_err("Invalid line %d, missing state definitions\n",
2181                                num);
2182                         ret = -EINVAL;
2183                         break;
2184                 }
2185                 ptr++;
2186                 lba_map = core_alua_allocate_lba_map(&lba_list,
2187                                                      start_lba, end_lba);
2188                 if (IS_ERR(lba_map)) {
2189                         ret = PTR_ERR(lba_map);
2190                         break;
2191                 }
2192                 pg = 0;
2193                 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2194                         switch (state) {
2195                         case 'O':
2196                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2197                                 break;
2198                         case 'A':
2199                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2200                                 break;
2201                         case 'S':
2202                                 alua_state = ALUA_ACCESS_STATE_STANDBY;
2203                                 break;
2204                         case 'U':
2205                                 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2206                                 break;
2207                         default:
2208                                 pr_err("Invalid ALUA state '%c'\n", state);
2209                                 ret = -EINVAL;
2210                                 goto out;
2211                         }
2212
2213                         ret = core_alua_allocate_lba_map_mem(lba_map,
2214                                                              pg_id, alua_state);
2215                         if (ret) {
2216                                 pr_err("Invalid target descriptor %d:%c "
2217                                        "at line %d\n",
2218                                        pg_id, state, num);
2219                                 break;
2220                         }
2221                         pg++;
2222                         ptr = strchr(ptr, ' ');
2223                         if (ptr)
2224                                 ptr++;
2225                         else
2226                                 break;
2227                 }
2228                 if (pg_num == -1)
2229                     pg_num = pg;
2230                 else if (pg != pg_num) {
2231                         pr_err("Only %d from %d port groups definitions "
2232                                "at line %d\n", pg, pg_num, num);
2233                         ret = -EINVAL;
2234                         break;
2235                 }
2236                 num++;
2237         }
2238 out:
2239         if (ret) {
2240                 core_alua_free_lba_map(&lba_list);
2241                 count = ret;
2242         } else
2243                 core_alua_set_lba_map(dev, &lba_list,
2244                                       segment_size, segment_mult);
2245         kfree(map_entries);
2246         return count;
2247 }
2248
2249 static struct target_core_configfs_attribute target_core_attr_dev_lba_map = {
2250         .attr   = { .ca_owner = THIS_MODULE,
2251                     .ca_name = "lba_map",
2252                     .ca_mode = S_IRUGO | S_IWUSR },
2253         .show   = target_core_show_dev_lba_map,
2254         .store  = target_core_store_dev_lba_map,
2255 };
2256
2257 static struct configfs_attribute *target_core_dev_attrs[] = {
2258         &target_core_attr_dev_info.attr,
2259         &target_core_attr_dev_control.attr,
2260         &target_core_attr_dev_alias.attr,
2261         &target_core_attr_dev_udev_path.attr,
2262         &target_core_attr_dev_enable.attr,
2263         &target_core_attr_dev_alua_lu_gp.attr,
2264         &target_core_attr_dev_lba_map.attr,
2265         NULL,
2266 };
2267
2268 static void target_core_dev_release(struct config_item *item)
2269 {
2270         struct config_group *dev_cg = to_config_group(item);
2271         struct se_device *dev =
2272                 container_of(dev_cg, struct se_device, dev_group);
2273
2274         kfree(dev_cg->default_groups);
2275         target_free_device(dev);
2276 }
2277
2278 static ssize_t target_core_dev_show(struct config_item *item,
2279                                      struct configfs_attribute *attr,
2280                                      char *page)
2281 {
2282         struct config_group *dev_cg = to_config_group(item);
2283         struct se_device *dev =
2284                 container_of(dev_cg, struct se_device, dev_group);
2285         struct target_core_configfs_attribute *tc_attr = container_of(
2286                         attr, struct target_core_configfs_attribute, attr);
2287
2288         if (!tc_attr->show)
2289                 return -EINVAL;
2290
2291         return tc_attr->show(dev, page);
2292 }
2293
2294 static ssize_t target_core_dev_store(struct config_item *item,
2295                                       struct configfs_attribute *attr,
2296                                       const char *page, size_t count)
2297 {
2298         struct config_group *dev_cg = to_config_group(item);
2299         struct se_device *dev =
2300                 container_of(dev_cg, struct se_device, dev_group);
2301         struct target_core_configfs_attribute *tc_attr = container_of(
2302                         attr, struct target_core_configfs_attribute, attr);
2303
2304         if (!tc_attr->store)
2305                 return -EINVAL;
2306
2307         return tc_attr->store(dev, page, count);
2308 }
2309
2310 static struct configfs_item_operations target_core_dev_item_ops = {
2311         .release                = target_core_dev_release,
2312         .show_attribute         = target_core_dev_show,
2313         .store_attribute        = target_core_dev_store,
2314 };
2315
2316 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2317
2318 /* End functions for struct config_item_type tb_dev_cit */
2319
2320 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2321
2322 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2323 #define SE_DEV_ALUA_LU_ATTR(_name, _mode)                               \
2324 static struct target_core_alua_lu_gp_attribute                          \
2325                         target_core_alua_lu_gp_##_name =                \
2326         __CONFIGFS_EATTR(_name, _mode,                                  \
2327         target_core_alua_lu_gp_show_attr_##_name,                       \
2328         target_core_alua_lu_gp_store_attr_##_name);
2329
2330 #define SE_DEV_ALUA_LU_ATTR_RO(_name)                                   \
2331 static struct target_core_alua_lu_gp_attribute                          \
2332                         target_core_alua_lu_gp_##_name =                \
2333         __CONFIGFS_EATTR_RO(_name,                                      \
2334         target_core_alua_lu_gp_show_attr_##_name);
2335
2336 /*
2337  * lu_gp_id
2338  */
2339 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2340         struct t10_alua_lu_gp *lu_gp,
2341         char *page)
2342 {
2343         if (!lu_gp->lu_gp_valid_id)
2344                 return 0;
2345
2346         return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2347 }
2348
2349 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2350         struct t10_alua_lu_gp *lu_gp,
2351         const char *page,
2352         size_t count)
2353 {
2354         struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2355         unsigned long lu_gp_id;
2356         int ret;
2357
2358         ret = kstrtoul(page, 0, &lu_gp_id);
2359         if (ret < 0) {
2360                 pr_err("kstrtoul() returned %d for"
2361                         " lu_gp_id\n", ret);
2362                 return ret;
2363         }
2364         if (lu_gp_id > 0x0000ffff) {
2365                 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2366                         " 0x0000ffff\n", lu_gp_id);
2367                 return -EINVAL;
2368         }
2369
2370         ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2371         if (ret < 0)
2372                 return -EINVAL;
2373
2374         pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2375                 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2376                 config_item_name(&alua_lu_gp_cg->cg_item),
2377                 lu_gp->lu_gp_id);
2378
2379         return count;
2380 }
2381
2382 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2383
2384 /*
2385  * members
2386  */
2387 static ssize_t target_core_alua_lu_gp_show_attr_members(
2388         struct t10_alua_lu_gp *lu_gp,
2389         char *page)
2390 {
2391         struct se_device *dev;
2392         struct se_hba *hba;
2393         struct t10_alua_lu_gp_member *lu_gp_mem;
2394         ssize_t len = 0, cur_len;
2395         unsigned char buf[LU_GROUP_NAME_BUF];
2396
2397         memset(buf, 0, LU_GROUP_NAME_BUF);
2398
2399         spin_lock(&lu_gp->lu_gp_lock);
2400         list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2401                 dev = lu_gp_mem->lu_gp_mem_dev;
2402                 hba = dev->se_hba;
2403
2404                 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2405                         config_item_name(&hba->hba_group.cg_item),
2406                         config_item_name(&dev->dev_group.cg_item));
2407                 cur_len++; /* Extra byte for NULL terminator */
2408
2409                 if ((cur_len + len) > PAGE_SIZE) {
2410                         pr_warn("Ran out of lu_gp_show_attr"
2411                                 "_members buffer\n");
2412                         break;
2413                 }
2414                 memcpy(page+len, buf, cur_len);
2415                 len += cur_len;
2416         }
2417         spin_unlock(&lu_gp->lu_gp_lock);
2418
2419         return len;
2420 }
2421
2422 SE_DEV_ALUA_LU_ATTR_RO(members);
2423
2424 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2425
2426 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2427         &target_core_alua_lu_gp_lu_gp_id.attr,
2428         &target_core_alua_lu_gp_members.attr,
2429         NULL,
2430 };
2431
2432 static void target_core_alua_lu_gp_release(struct config_item *item)
2433 {
2434         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2435                         struct t10_alua_lu_gp, lu_gp_group);
2436
2437         core_alua_free_lu_gp(lu_gp);
2438 }
2439
2440 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2441         .release                = target_core_alua_lu_gp_release,
2442         .show_attribute         = target_core_alua_lu_gp_attr_show,
2443         .store_attribute        = target_core_alua_lu_gp_attr_store,
2444 };
2445
2446 static struct config_item_type target_core_alua_lu_gp_cit = {
2447         .ct_item_ops            = &target_core_alua_lu_gp_ops,
2448         .ct_attrs               = target_core_alua_lu_gp_attrs,
2449         .ct_owner               = THIS_MODULE,
2450 };
2451
2452 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2453
2454 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2455
2456 static struct config_group *target_core_alua_create_lu_gp(
2457         struct config_group *group,
2458         const char *name)
2459 {
2460         struct t10_alua_lu_gp *lu_gp;
2461         struct config_group *alua_lu_gp_cg = NULL;
2462         struct config_item *alua_lu_gp_ci = NULL;
2463
2464         lu_gp = core_alua_allocate_lu_gp(name, 0);
2465         if (IS_ERR(lu_gp))
2466                 return NULL;
2467
2468         alua_lu_gp_cg = &lu_gp->lu_gp_group;
2469         alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2470
2471         config_group_init_type_name(alua_lu_gp_cg, name,
2472                         &target_core_alua_lu_gp_cit);
2473
2474         pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2475                 " Group: core/alua/lu_gps/%s\n",
2476                 config_item_name(alua_lu_gp_ci));
2477
2478         return alua_lu_gp_cg;
2479
2480 }
2481
2482 static void target_core_alua_drop_lu_gp(
2483         struct config_group *group,
2484         struct config_item *item)
2485 {
2486         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2487                         struct t10_alua_lu_gp, lu_gp_group);
2488
2489         pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2490                 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2491                 config_item_name(item), lu_gp->lu_gp_id);
2492         /*
2493          * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2494          * -> target_core_alua_lu_gp_release()
2495          */
2496         config_item_put(item);
2497 }
2498
2499 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2500         .make_group             = &target_core_alua_create_lu_gp,
2501         .drop_item              = &target_core_alua_drop_lu_gp,
2502 };
2503
2504 static struct config_item_type target_core_alua_lu_gps_cit = {
2505         .ct_item_ops            = NULL,
2506         .ct_group_ops           = &target_core_alua_lu_gps_group_ops,
2507         .ct_owner               = THIS_MODULE,
2508 };
2509
2510 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2511
2512 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2513
2514 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2515 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode)                            \
2516 static struct target_core_alua_tg_pt_gp_attribute                       \
2517                         target_core_alua_tg_pt_gp_##_name =             \
2518         __CONFIGFS_EATTR(_name, _mode,                                  \
2519         target_core_alua_tg_pt_gp_show_attr_##_name,                    \
2520         target_core_alua_tg_pt_gp_store_attr_##_name);
2521
2522 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name)                                \
2523 static struct target_core_alua_tg_pt_gp_attribute                       \
2524                         target_core_alua_tg_pt_gp_##_name =             \
2525         __CONFIGFS_EATTR_RO(_name,                                      \
2526         target_core_alua_tg_pt_gp_show_attr_##_name);
2527
2528 /*
2529  * alua_access_state
2530  */
2531 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2532         struct t10_alua_tg_pt_gp *tg_pt_gp,
2533         char *page)
2534 {
2535         return sprintf(page, "%d\n",
2536                 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2537 }
2538
2539 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2540         struct t10_alua_tg_pt_gp *tg_pt_gp,
2541         const char *page,
2542         size_t count)
2543 {
2544         struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2545         unsigned long tmp;
2546         int new_state, ret;
2547
2548         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2549                 pr_err("Unable to do implicit ALUA on non valid"
2550                         " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2551                 return -EINVAL;
2552         }
2553         if (!(dev->dev_flags & DF_CONFIGURED)) {
2554                 pr_err("Unable to set alua_access_state while device is"
2555                        " not configured\n");
2556                 return -ENODEV;
2557         }
2558
2559         ret = kstrtoul(page, 0, &tmp);
2560         if (ret < 0) {
2561                 pr_err("Unable to extract new ALUA access state from"
2562                                 " %s\n", page);
2563                 return ret;
2564         }
2565         new_state = (int)tmp;
2566
2567         if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2568                 pr_err("Unable to process implicit configfs ALUA"
2569                         " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2570                 return -EINVAL;
2571         }
2572         if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2573             new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2574                 /* LBA DEPENDENT is only allowed with implicit ALUA */
2575                 pr_err("Unable to process implicit configfs ALUA transition"
2576                        " while explicit ALUA management is enabled\n");
2577                 return -EINVAL;
2578         }
2579
2580         ret = core_alua_do_port_transition(tg_pt_gp, dev,
2581                                         NULL, NULL, new_state, 0);
2582         return (!ret) ? count : -EINVAL;
2583 }
2584
2585 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2586
2587 /*
2588  * alua_access_status
2589  */
2590 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2591         struct t10_alua_tg_pt_gp *tg_pt_gp,
2592         char *page)
2593 {
2594         return sprintf(page, "%s\n",
2595                 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2596 }
2597
2598 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2599         struct t10_alua_tg_pt_gp *tg_pt_gp,
2600         const char *page,
2601         size_t count)
2602 {
2603         unsigned long tmp;
2604         int new_status, ret;
2605
2606         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2607                 pr_err("Unable to do set ALUA access status on non"
2608                         " valid tg_pt_gp ID: %hu\n",
2609                         tg_pt_gp->tg_pt_gp_valid_id);
2610                 return -EINVAL;
2611         }
2612
2613         ret = kstrtoul(page, 0, &tmp);
2614         if (ret < 0) {
2615                 pr_err("Unable to extract new ALUA access status"
2616                                 " from %s\n", page);
2617                 return ret;
2618         }
2619         new_status = (int)tmp;
2620
2621         if ((new_status != ALUA_STATUS_NONE) &&
2622             (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2623             (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2624                 pr_err("Illegal ALUA access status: 0x%02x\n",
2625                                 new_status);
2626                 return -EINVAL;
2627         }
2628
2629         tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2630         return count;
2631 }
2632
2633 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2634
2635 /*
2636  * alua_access_type
2637  */
2638 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2639         struct t10_alua_tg_pt_gp *tg_pt_gp,
2640         char *page)
2641 {
2642         return core_alua_show_access_type(tg_pt_gp, page);
2643 }
2644
2645 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2646         struct t10_alua_tg_pt_gp *tg_pt_gp,
2647         const char *page,
2648         size_t count)
2649 {
2650         return core_alua_store_access_type(tg_pt_gp, page, count);
2651 }
2652
2653 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2654
2655 /*
2656  * alua_supported_states
2657  */
2658
2659 #define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit)               \
2660 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \
2661         struct t10_alua_tg_pt_gp *t, char *p)                           \
2662 {                                                                       \
2663         return sprintf(p, "%d\n", !!(t->_var & _bit));                  \
2664 }
2665
2666 #define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit)              \
2667 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\
2668         struct t10_alua_tg_pt_gp *t, const char *p, size_t c)           \
2669 {                                                                       \
2670         unsigned long tmp;                                              \
2671         int ret;                                                        \
2672                                                                         \
2673         if (!t->tg_pt_gp_valid_id) {                                    \
2674                 pr_err("Unable to do set ##_name ALUA state on non"     \
2675                        " valid tg_pt_gp ID: %hu\n",                     \
2676                        t->tg_pt_gp_valid_id);                           \
2677                 return -EINVAL;                                         \
2678         }                                                               \
2679                                                                         \
2680         ret = kstrtoul(p, 0, &tmp);                                     \
2681         if (ret < 0) {                                                  \
2682                 pr_err("Invalid value '%s', must be '0' or '1'\n", p);  \
2683                 return -EINVAL;                                         \
2684         }                                                               \
2685         if (tmp > 1) {                                                  \
2686                 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2687                 return -EINVAL;                                         \
2688         }                                                               \
2689         if (tmp)                                                        \
2690                 t->_var |= _bit;                                        \
2691         else                                                            \
2692                 t->_var &= ~_bit;                                       \
2693                                                                         \
2694         return c;                                                       \
2695 }
2696
2697 SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning,
2698                                tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2699 SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning,
2700                                 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2701 SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR);
2702
2703 SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline,
2704                                tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2705 SE_DEV_ALUA_SUPPORT_STATE_STORE(offline,
2706                                 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2707 SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR);
2708
2709 SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent,
2710                                tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2711 SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent,
2712                                 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2713 SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO);
2714
2715 SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable,
2716                                tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2717 SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable,
2718                                 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2719 SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR);
2720
2721 SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby,
2722                                tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2723 SE_DEV_ALUA_SUPPORT_STATE_STORE(standby,
2724                                 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2725 SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR);
2726
2727 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized,
2728                                tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2729 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized,
2730                                 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2731 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR);
2732
2733 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized,
2734                                tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2735 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized,
2736                                 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2737 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR);
2738
2739 /*
2740  * alua_write_metadata
2741  */
2742 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2743         struct t10_alua_tg_pt_gp *tg_pt_gp,
2744         char *page)
2745 {
2746         return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2747 }
2748
2749 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2750         struct t10_alua_tg_pt_gp *tg_pt_gp,
2751         const char *page,
2752         size_t count)
2753 {
2754         unsigned long tmp;
2755         int ret;
2756
2757         ret = kstrtoul(page, 0, &tmp);
2758         if (ret < 0) {
2759                 pr_err("Unable to extract alua_write_metadata\n");
2760                 return ret;
2761         }
2762
2763         if ((tmp != 0) && (tmp != 1)) {
2764                 pr_err("Illegal value for alua_write_metadata:"
2765                         " %lu\n", tmp);
2766                 return -EINVAL;
2767         }
2768         tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2769
2770         return count;
2771 }
2772
2773 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2774
2775
2776
2777 /*
2778  * nonop_delay_msecs
2779  */
2780 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2781         struct t10_alua_tg_pt_gp *tg_pt_gp,
2782         char *page)
2783 {
2784         return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2785
2786 }
2787
2788 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2789         struct t10_alua_tg_pt_gp *tg_pt_gp,
2790         const char *page,
2791         size_t count)
2792 {
2793         return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2794 }
2795
2796 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2797
2798 /*
2799  * trans_delay_msecs
2800  */
2801 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2802         struct t10_alua_tg_pt_gp *tg_pt_gp,
2803         char *page)
2804 {
2805         return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2806 }
2807
2808 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2809         struct t10_alua_tg_pt_gp *tg_pt_gp,
2810         const char *page,
2811         size_t count)
2812 {
2813         return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2814 }
2815
2816 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2817
2818 /*
2819  * implicit_trans_secs
2820  */
2821 static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs(
2822         struct t10_alua_tg_pt_gp *tg_pt_gp,
2823         char *page)
2824 {
2825         return core_alua_show_implicit_trans_secs(tg_pt_gp, page);
2826 }
2827
2828 static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs(
2829         struct t10_alua_tg_pt_gp *tg_pt_gp,
2830         const char *page,
2831         size_t count)
2832 {
2833         return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count);
2834 }
2835
2836 SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR);
2837
2838 /*
2839  * preferred
2840  */
2841
2842 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2843         struct t10_alua_tg_pt_gp *tg_pt_gp,
2844         char *page)
2845 {
2846         return core_alua_show_preferred_bit(tg_pt_gp, page);
2847 }
2848
2849 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2850         struct t10_alua_tg_pt_gp *tg_pt_gp,
2851         const char *page,
2852         size_t count)
2853 {
2854         return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2855 }
2856
2857 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2858
2859 /*
2860  * tg_pt_gp_id
2861  */
2862 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2863         struct t10_alua_tg_pt_gp *tg_pt_gp,
2864         char *page)
2865 {
2866         if (!tg_pt_gp->tg_pt_gp_valid_id)
2867                 return 0;
2868
2869         return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2870 }
2871
2872 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2873         struct t10_alua_tg_pt_gp *tg_pt_gp,
2874         const char *page,
2875         size_t count)
2876 {
2877         struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2878         unsigned long tg_pt_gp_id;
2879         int ret;
2880
2881         ret = kstrtoul(page, 0, &tg_pt_gp_id);
2882         if (ret < 0) {
2883                 pr_err("kstrtoul() returned %d for"
2884                         " tg_pt_gp_id\n", ret);
2885                 return ret;
2886         }
2887         if (tg_pt_gp_id > 0x0000ffff) {
2888                 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2889                         " 0x0000ffff\n", tg_pt_gp_id);
2890                 return -EINVAL;
2891         }
2892
2893         ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2894         if (ret < 0)
2895                 return -EINVAL;
2896
2897         pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2898                 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2899                 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2900                 tg_pt_gp->tg_pt_gp_id);
2901
2902         return count;
2903 }
2904
2905 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2906
2907 /*
2908  * members
2909  */
2910 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2911         struct t10_alua_tg_pt_gp *tg_pt_gp,
2912         char *page)
2913 {
2914         struct se_lun *lun;
2915         ssize_t len = 0, cur_len;
2916         unsigned char buf[TG_PT_GROUP_NAME_BUF];
2917
2918         memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2919
2920         spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2921         list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
2922                         lun_tg_pt_gp_link) {
2923                 struct se_portal_group *tpg = lun->lun_tpg;
2924
2925                 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2926                         "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2927                         tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2928                         tpg->se_tpg_tfo->tpg_get_tag(tpg),
2929                         config_item_name(&lun->lun_group.cg_item));
2930                 cur_len++; /* Extra byte for NULL terminator */
2931
2932                 if ((cur_len + len) > PAGE_SIZE) {
2933                         pr_warn("Ran out of lu_gp_show_attr"
2934                                 "_members buffer\n");
2935                         break;
2936                 }
2937                 memcpy(page+len, buf, cur_len);
2938                 len += cur_len;
2939         }
2940         spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2941
2942         return len;
2943 }
2944
2945 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2946
2947 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2948                         tg_pt_gp_group);
2949
2950 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2951         &target_core_alua_tg_pt_gp_alua_access_state.attr,
2952         &target_core_alua_tg_pt_gp_alua_access_status.attr,
2953         &target_core_alua_tg_pt_gp_alua_access_type.attr,
2954         &target_core_alua_tg_pt_gp_alua_support_transitioning.attr,
2955         &target_core_alua_tg_pt_gp_alua_support_offline.attr,
2956         &target_core_alua_tg_pt_gp_alua_support_lba_dependent.attr,
2957         &target_core_alua_tg_pt_gp_alua_support_unavailable.attr,
2958         &target_core_alua_tg_pt_gp_alua_support_standby.attr,
2959         &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized.attr,
2960         &target_core_alua_tg_pt_gp_alua_support_active_optimized.attr,
2961         &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2962         &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2963         &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2964         &target_core_alua_tg_pt_gp_implicit_trans_secs.attr,
2965         &target_core_alua_tg_pt_gp_preferred.attr,
2966         &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2967         &target_core_alua_tg_pt_gp_members.attr,
2968         NULL,
2969 };
2970
2971 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2972 {
2973         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2974                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2975
2976         core_alua_free_tg_pt_gp(tg_pt_gp);
2977 }
2978
2979 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2980         .release                = target_core_alua_tg_pt_gp_release,
2981         .show_attribute         = target_core_alua_tg_pt_gp_attr_show,
2982         .store_attribute        = target_core_alua_tg_pt_gp_attr_store,
2983 };
2984
2985 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2986         .ct_item_ops            = &target_core_alua_tg_pt_gp_ops,
2987         .ct_attrs               = target_core_alua_tg_pt_gp_attrs,
2988         .ct_owner               = THIS_MODULE,
2989 };
2990
2991 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2992
2993 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2994
2995 static struct config_group *target_core_alua_create_tg_pt_gp(
2996         struct config_group *group,
2997         const char *name)
2998 {
2999         struct t10_alua *alua = container_of(group, struct t10_alua,
3000                                         alua_tg_pt_gps_group);
3001         struct t10_alua_tg_pt_gp *tg_pt_gp;
3002         struct config_group *alua_tg_pt_gp_cg = NULL;
3003         struct config_item *alua_tg_pt_gp_ci = NULL;
3004
3005         tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
3006         if (!tg_pt_gp)
3007                 return NULL;
3008
3009         alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
3010         alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
3011
3012         config_group_init_type_name(alua_tg_pt_gp_cg, name,
3013                         &target_core_alua_tg_pt_gp_cit);
3014
3015         pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
3016                 " Group: alua/tg_pt_gps/%s\n",
3017                 config_item_name(alua_tg_pt_gp_ci));
3018
3019         return alua_tg_pt_gp_cg;
3020 }
3021
3022 static void target_core_alua_drop_tg_pt_gp(
3023         struct config_group *group,
3024         struct config_item *item)
3025 {
3026         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3027                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3028
3029         pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
3030                 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
3031                 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
3032         /*
3033          * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
3034          * -> target_core_alua_tg_pt_gp_release().
3035          */
3036         config_item_put(item);
3037 }
3038
3039 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
3040         .make_group             = &target_core_alua_create_tg_pt_gp,
3041         .drop_item              = &target_core_alua_drop_tg_pt_gp,
3042 };
3043
3044 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
3045
3046 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3047
3048 /* Start functions for struct config_item_type target_core_alua_cit */
3049
3050 /*
3051  * target_core_alua_cit is a ConfigFS group that lives under
3052  * /sys/kernel/config/target/core/alua.  There are default groups
3053  * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
3054  * target_core_alua_cit in target_core_init_configfs() below.
3055  */
3056 static struct config_item_type target_core_alua_cit = {
3057         .ct_item_ops            = NULL,
3058         .ct_attrs               = NULL,
3059         .ct_owner               = THIS_MODULE,
3060 };
3061
3062 /* End functions for struct config_item_type target_core_alua_cit */
3063
3064 /* Start functions for struct config_item_type tb_dev_stat_cit */
3065
3066 static struct config_group *target_core_stat_mkdir(
3067         struct config_group *group,
3068         const char *name)
3069 {
3070         return ERR_PTR(-ENOSYS);
3071 }
3072
3073 static void target_core_stat_rmdir(
3074         struct config_group *group,
3075         struct config_item *item)
3076 {
3077         return;
3078 }
3079
3080 static struct configfs_group_operations target_core_stat_group_ops = {
3081         .make_group             = &target_core_stat_mkdir,
3082         .drop_item              = &target_core_stat_rmdir,
3083 };
3084
3085 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
3086
3087 /* End functions for struct config_item_type tb_dev_stat_cit */
3088
3089 /* Start functions for struct config_item_type target_core_hba_cit */
3090
3091 static struct config_group *target_core_make_subdev(
3092         struct config_group *group,
3093         const char *name)
3094 {
3095         struct t10_alua_tg_pt_gp *tg_pt_gp;
3096         struct config_item *hba_ci = &group->cg_item;
3097         struct se_hba *hba = item_to_hba(hba_ci);
3098         struct target_backend *tb = hba->backend;
3099         struct se_device *dev;
3100         struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
3101         struct config_group *dev_stat_grp = NULL;
3102         int errno = -ENOMEM, ret;
3103
3104         ret = mutex_lock_interruptible(&hba->hba_access_mutex);
3105         if (ret)
3106                 return ERR_PTR(ret);
3107
3108         dev = target_alloc_device(hba, name);
3109         if (!dev)
3110                 goto out_unlock;
3111
3112         dev_cg = &dev->dev_group;
3113
3114         dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
3115                         GFP_KERNEL);
3116         if (!dev_cg->default_groups)
3117                 goto out_free_device;
3118
3119         config_group_init_type_name(dev_cg, name, &tb->tb_dev_cit);
3120         config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
3121                         &tb->tb_dev_attrib_cit);
3122         config_group_init_type_name(&dev->dev_pr_group, "pr",
3123                         &tb->tb_dev_pr_cit);
3124         config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
3125                         &tb->tb_dev_wwn_cit);
3126         config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
3127                         "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
3128         config_group_init_type_name(&dev->dev_stat_grps.stat_group,
3129                         "statistics", &tb->tb_dev_stat_cit);
3130
3131         dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
3132         dev_cg->default_groups[1] = &dev->dev_pr_group;
3133         dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
3134         dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
3135         dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
3136         dev_cg->default_groups[5] = NULL;
3137         /*
3138          * Add core/$HBA/$DEV/alua/default_tg_pt_gp
3139          */
3140         tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
3141         if (!tg_pt_gp)
3142                 goto out_free_dev_cg_default_groups;
3143         dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
3144
3145         tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
3146         tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3147                                 GFP_KERNEL);
3148         if (!tg_pt_gp_cg->default_groups) {
3149                 pr_err("Unable to allocate tg_pt_gp_cg->"
3150                                 "default_groups\n");
3151                 goto out_free_tg_pt_gp;
3152         }
3153
3154         config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
3155                         "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
3156         tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
3157         tg_pt_gp_cg->default_groups[1] = NULL;
3158         /*
3159          * Add core/$HBA/$DEV/statistics/ default groups
3160          */
3161         dev_stat_grp = &dev->dev_stat_grps.stat_group;
3162         dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
3163                                 GFP_KERNEL);
3164         if (!dev_stat_grp->default_groups) {
3165                 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
3166                 goto out_free_tg_pt_gp_cg_default_groups;
3167         }
3168         target_stat_setup_dev_default_groups(dev);
3169
3170         mutex_unlock(&hba->hba_access_mutex);
3171         return dev_cg;
3172
3173 out_free_tg_pt_gp_cg_default_groups:
3174         kfree(tg_pt_gp_cg->default_groups);
3175 out_free_tg_pt_gp:
3176         core_alua_free_tg_pt_gp(tg_pt_gp);
3177 out_free_dev_cg_default_groups:
3178         kfree(dev_cg->default_groups);
3179 out_free_device:
3180         target_free_device(dev);
3181 out_unlock:
3182         mutex_unlock(&hba->hba_access_mutex);
3183         return ERR_PTR(errno);
3184 }
3185
3186 static void target_core_drop_subdev(
3187         struct config_group *group,
3188         struct config_item *item)
3189 {
3190         struct config_group *dev_cg = to_config_group(item);
3191         struct se_device *dev =
3192                 container_of(dev_cg, struct se_device, dev_group);
3193         struct se_hba *hba;
3194         struct config_item *df_item;
3195         struct config_group *tg_pt_gp_cg, *dev_stat_grp;
3196         int i;
3197
3198         hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
3199
3200         mutex_lock(&hba->hba_access_mutex);
3201
3202         dev_stat_grp = &dev->dev_stat_grps.stat_group;
3203         for (i = 0; dev_stat_grp->default_groups[i]; i++) {
3204                 df_item = &dev_stat_grp->default_groups[i]->cg_item;
3205                 dev_stat_grp->default_groups[i] = NULL;
3206                 config_item_put(df_item);
3207         }
3208         kfree(dev_stat_grp->default_groups);
3209
3210         tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
3211         for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
3212                 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
3213                 tg_pt_gp_cg->default_groups[i] = NULL;
3214                 config_item_put(df_item);
3215         }
3216         kfree(tg_pt_gp_cg->default_groups);
3217         /*
3218          * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
3219          * directly from target_core_alua_tg_pt_gp_release().
3220          */
3221         dev->t10_alua.default_tg_pt_gp = NULL;
3222
3223         for (i = 0; dev_cg->default_groups[i]; i++) {
3224                 df_item = &dev_cg->default_groups[i]->cg_item;
3225                 dev_cg->default_groups[i] = NULL;
3226                 config_item_put(df_item);
3227         }
3228         /*
3229          * se_dev is released from target_core_dev_item_ops->release()
3230          */
3231         config_item_put(item);
3232         mutex_unlock(&hba->hba_access_mutex);
3233 }
3234
3235 static struct configfs_group_operations target_core_hba_group_ops = {
3236         .make_group             = target_core_make_subdev,
3237         .drop_item              = target_core_drop_subdev,
3238 };
3239
3240 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
3241 #define SE_HBA_ATTR(_name, _mode)                               \
3242 static struct target_core_hba_attribute                         \
3243                 target_core_hba_##_name =                       \
3244                 __CONFIGFS_EATTR(_name, _mode,                  \
3245                 target_core_hba_show_attr_##_name,              \
3246                 target_core_hba_store_attr_##_name);
3247
3248 #define SE_HBA_ATTR_RO(_name)                                   \
3249 static struct target_core_hba_attribute                         \
3250                 target_core_hba_##_name =                       \
3251                 __CONFIGFS_EATTR_RO(_name,                      \
3252                 target_core_hba_show_attr_##_name);
3253
3254 static ssize_t target_core_hba_show_attr_hba_info(
3255         struct se_hba *hba,
3256         char *page)
3257 {
3258         return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
3259                         hba->hba_id, hba->backend->ops->name,
3260                         TARGET_CORE_VERSION);
3261 }
3262
3263 SE_HBA_ATTR_RO(hba_info);
3264
3265 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
3266                                 char *page)
3267 {
3268         int hba_mode = 0;
3269
3270         if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
3271                 hba_mode = 1;
3272
3273         return sprintf(page, "%d\n", hba_mode);
3274 }
3275
3276 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
3277                                 const char *page, size_t count)
3278 {
3279         unsigned long mode_flag;
3280         int ret;
3281
3282         if (hba->backend->ops->pmode_enable_hba == NULL)
3283                 return -EINVAL;
3284
3285         ret = kstrtoul(page, 0, &mode_flag);
3286         if (ret < 0) {
3287                 pr_err("Unable to extract hba mode flag: %d\n", ret);
3288                 return ret;
3289         }
3290
3291         if (hba->dev_count) {
3292                 pr_err("Unable to set hba_mode with active devices\n");
3293                 return -EINVAL;
3294         }
3295
3296         ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
3297         if (ret < 0)
3298                 return -EINVAL;
3299         if (ret > 0)
3300                 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3301         else if (ret == 0)
3302                 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3303
3304         return count;
3305 }
3306
3307 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
3308
3309 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
3310
3311 static void target_core_hba_release(struct config_item *item)
3312 {
3313         struct se_hba *hba = container_of(to_config_group(item),
3314                                 struct se_hba, hba_group);
3315         core_delete_hba(hba);
3316 }
3317
3318 static struct configfs_attribute *target_core_hba_attrs[] = {
3319         &target_core_hba_hba_info.attr,
3320         &target_core_hba_hba_mode.attr,
3321         NULL,
3322 };
3323
3324 static struct configfs_item_operations target_core_hba_item_ops = {
3325         .release                = target_core_hba_release,
3326         .show_attribute         = target_core_hba_attr_show,
3327         .store_attribute        = target_core_hba_attr_store,
3328 };
3329
3330 static struct config_item_type target_core_hba_cit = {
3331         .ct_item_ops            = &target_core_hba_item_ops,
3332         .ct_group_ops           = &target_core_hba_group_ops,
3333         .ct_attrs               = target_core_hba_attrs,
3334         .ct_owner               = THIS_MODULE,
3335 };
3336
3337 static struct config_group *target_core_call_addhbatotarget(
3338         struct config_group *group,
3339         const char *name)
3340 {
3341         char *se_plugin_str, *str, *str2;
3342         struct se_hba *hba;
3343         char buf[TARGET_CORE_NAME_MAX_LEN];
3344         unsigned long plugin_dep_id = 0;
3345         int ret;
3346
3347         memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3348         if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3349                 pr_err("Passed *name strlen(): %d exceeds"
3350                         " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3351                         TARGET_CORE_NAME_MAX_LEN);
3352                 return ERR_PTR(-ENAMETOOLONG);
3353         }
3354         snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3355
3356         str = strstr(buf, "_");
3357         if (!str) {
3358                 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3359                 return ERR_PTR(-EINVAL);
3360         }
3361         se_plugin_str = buf;
3362         /*
3363          * Special case for subsystem plugins that have "_" in their names.
3364          * Namely rd_direct and rd_mcp..
3365          */
3366         str2 = strstr(str+1, "_");
3367         if (str2) {
3368                 *str2 = '\0'; /* Terminate for *se_plugin_str */
3369                 str2++; /* Skip to start of plugin dependent ID */
3370                 str = str2;
3371         } else {
3372                 *str = '\0'; /* Terminate for *se_plugin_str */
3373                 str++; /* Skip to start of plugin dependent ID */
3374         }
3375
3376         ret = kstrtoul(str, 0, &plugin_dep_id);
3377         if (ret < 0) {
3378                 pr_err("kstrtoul() returned %d for"
3379                                 " plugin_dep_id\n", ret);
3380                 return ERR_PTR(ret);
3381         }
3382         /*
3383          * Load up TCM subsystem plugins if they have not already been loaded.
3384          */
3385         transport_subsystem_check_init();
3386
3387         hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3388         if (IS_ERR(hba))
3389                 return ERR_CAST(hba);
3390
3391         config_group_init_type_name(&hba->hba_group, name,
3392                         &target_core_hba_cit);
3393
3394         return &hba->hba_group;
3395 }
3396
3397 static void target_core_call_delhbafromtarget(
3398         struct config_group *group,
3399         struct config_item *item)
3400 {
3401         /*
3402          * core_delete_hba() is called from target_core_hba_item_ops->release()
3403          * -> target_core_hba_release()
3404          */
3405         config_item_put(item);
3406 }
3407
3408 static struct configfs_group_operations target_core_group_ops = {
3409         .make_group     = target_core_call_addhbatotarget,
3410         .drop_item      = target_core_call_delhbafromtarget,
3411 };
3412
3413 static struct config_item_type target_core_cit = {
3414         .ct_item_ops    = NULL,
3415         .ct_group_ops   = &target_core_group_ops,
3416         .ct_attrs       = NULL,
3417         .ct_owner       = THIS_MODULE,
3418 };
3419
3420 /* Stop functions for struct config_item_type target_core_hba_cit */
3421
3422 void target_setup_backend_cits(struct target_backend *tb)
3423 {
3424         target_core_setup_dev_cit(tb);
3425         target_core_setup_dev_attrib_cit(tb);
3426         target_core_setup_dev_pr_cit(tb);
3427         target_core_setup_dev_wwn_cit(tb);
3428         target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3429         target_core_setup_dev_stat_cit(tb);
3430 }
3431
3432 static int __init target_core_init_configfs(void)
3433 {
3434         struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3435         struct config_group *lu_gp_cg = NULL;
3436         struct configfs_subsystem *subsys = &target_core_fabrics;
3437         struct t10_alua_lu_gp *lu_gp;
3438         int ret;
3439
3440         pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3441                 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3442                 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3443
3444         config_group_init(&subsys->su_group);
3445         mutex_init(&subsys->su_mutex);
3446
3447         ret = init_se_kmem_caches();
3448         if (ret < 0)
3449                 return ret;
3450         /*
3451          * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3452          * and ALUA Logical Unit Group and Target Port Group infrastructure.
3453          */
3454         target_cg = &subsys->su_group;
3455         target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3456                                 GFP_KERNEL);
3457         if (!target_cg->default_groups) {
3458                 pr_err("Unable to allocate target_cg->default_groups\n");
3459                 ret = -ENOMEM;
3460                 goto out_global;
3461         }
3462
3463         config_group_init_type_name(&target_core_hbagroup,
3464                         "core", &target_core_cit);
3465         target_cg->default_groups[0] = &target_core_hbagroup;
3466         target_cg->default_groups[1] = NULL;
3467         /*
3468          * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3469          */
3470         hba_cg = &target_core_hbagroup;
3471         hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3472                                 GFP_KERNEL);
3473         if (!hba_cg->default_groups) {
3474                 pr_err("Unable to allocate hba_cg->default_groups\n");
3475                 ret = -ENOMEM;
3476                 goto out_global;
3477         }
3478         config_group_init_type_name(&alua_group,
3479                         "alua", &target_core_alua_cit);
3480         hba_cg->default_groups[0] = &alua_group;
3481         hba_cg->default_groups[1] = NULL;
3482         /*
3483          * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3484          * groups under /sys/kernel/config/target/core/alua/
3485          */
3486         alua_cg = &alua_group;
3487         alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3488                         GFP_KERNEL);
3489         if (!alua_cg->default_groups) {
3490                 pr_err("Unable to allocate alua_cg->default_groups\n");
3491                 ret = -ENOMEM;
3492                 goto out_global;
3493         }
3494
3495         config_group_init_type_name(&alua_lu_gps_group,
3496                         "lu_gps", &target_core_alua_lu_gps_cit);
3497         alua_cg->default_groups[0] = &alua_lu_gps_group;
3498         alua_cg->default_groups[1] = NULL;
3499         /*
3500          * Add core/alua/lu_gps/default_lu_gp
3501          */
3502         lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3503         if (IS_ERR(lu_gp)) {
3504                 ret = -ENOMEM;
3505                 goto out_global;
3506         }
3507
3508         lu_gp_cg = &alua_lu_gps_group;
3509         lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3510                         GFP_KERNEL);
3511         if (!lu_gp_cg->default_groups) {
3512                 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3513                 ret = -ENOMEM;
3514                 goto out_global;
3515         }
3516
3517         config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3518                                 &target_core_alua_lu_gp_cit);
3519         lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3520         lu_gp_cg->default_groups[1] = NULL;
3521         default_lu_gp = lu_gp;
3522         /*
3523          * Register the target_core_mod subsystem with configfs.
3524          */
3525         ret = configfs_register_subsystem(subsys);
3526         if (ret < 0) {
3527                 pr_err("Error %d while registering subsystem %s\n",
3528                         ret, subsys->su_group.cg_item.ci_namebuf);
3529                 goto out_global;
3530         }
3531         pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3532                 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
3533                 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3534         /*
3535          * Register built-in RAMDISK subsystem logic for virtual LUN 0
3536          */
3537         ret = rd_module_init();
3538         if (ret < 0)
3539                 goto out;
3540
3541         ret = core_dev_setup_virtual_lun0();
3542         if (ret < 0)
3543                 goto out;
3544
3545         ret = target_xcopy_setup_pt();
3546         if (ret < 0)
3547                 goto out;
3548
3549         return 0;
3550
3551 out:
3552         configfs_unregister_subsystem(subsys);
3553         core_dev_release_virtual_lun0();
3554         rd_module_exit();
3555 out_global:
3556         if (default_lu_gp) {
3557                 core_alua_free_lu_gp(default_lu_gp);
3558                 default_lu_gp = NULL;
3559         }
3560         if (lu_gp_cg)
3561                 kfree(lu_gp_cg->default_groups);
3562         if (alua_cg)
3563                 kfree(alua_cg->default_groups);
3564         if (hba_cg)
3565                 kfree(hba_cg->default_groups);
3566         kfree(target_cg->default_groups);
3567         release_se_kmem_caches();
3568         return ret;
3569 }
3570
3571 static void __exit target_core_exit_configfs(void)
3572 {
3573         struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3574         struct config_item *item;
3575         int i;
3576
3577         lu_gp_cg = &alua_lu_gps_group;
3578         for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3579                 item = &lu_gp_cg->default_groups[i]->cg_item;
3580                 lu_gp_cg->default_groups[i] = NULL;
3581                 config_item_put(item);
3582         }
3583         kfree(lu_gp_cg->default_groups);
3584         lu_gp_cg->default_groups = NULL;
3585
3586         alua_cg = &alua_group;
3587         for (i = 0; alua_cg->default_groups[i]; i++) {
3588                 item = &alua_cg->default_groups[i]->cg_item;
3589                 alua_cg->default_groups[i] = NULL;
3590                 config_item_put(item);
3591         }
3592         kfree(alua_cg->default_groups);
3593         alua_cg->default_groups = NULL;
3594
3595         hba_cg = &target_core_hbagroup;
3596         for (i = 0; hba_cg->default_groups[i]; i++) {
3597                 item = &hba_cg->default_groups[i]->cg_item;
3598                 hba_cg->default_groups[i] = NULL;
3599                 config_item_put(item);
3600         }
3601         kfree(hba_cg->default_groups);
3602         hba_cg->default_groups = NULL;
3603         /*
3604          * We expect subsys->su_group.default_groups to be released
3605          * by configfs subsystem provider logic..
3606          */
3607         configfs_unregister_subsystem(&target_core_fabrics);
3608         kfree(target_core_fabrics.su_group.default_groups);
3609
3610         core_alua_free_lu_gp(default_lu_gp);
3611         default_lu_gp = NULL;
3612
3613         pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3614                         " Infrastructure\n");
3615
3616         core_dev_release_virtual_lun0();
3617         rd_module_exit();
3618         target_xcopy_release_pt();
3619         release_se_kmem_caches();
3620 }
3621
3622 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3623 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3624 MODULE_LICENSE("GPL");
3625
3626 module_init(target_core_init_configfs);
3627 module_exit(target_core_exit_configfs);