drivers/target/target_core_configfs.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*******************************************************************************
   3  * Filename:  target_core_configfs.c
   4  *
   5  * This file contains ConfigFS logic for the Generic Target Engine project.
   6  *
   7  * (c) Copyright 2008-2013 Datera, Inc.
   8  *
   9  * Nicholas A. Bellinger <nab@kernel.org>
  10  *
  11  * based on configfs Copyright (C) 2005 Oracle.  All rights reserved.
  12  *
  13  ****************************************************************************/
  14
  15 #include <linux/module.h>
  16 #include <linux/moduleparam.h>
  17 #include <generated/utsrelease.h>
  18 #include <linux/utsname.h>
  19 #include <linux/init.h>
  20 #include <linux/fs.h>
  21 #include <linux/namei.h>
  22 #include <linux/slab.h>
  23 #include <linux/types.h>
  24 #include <linux/delay.h>
  25 #include <linux/unistd.h>
  26 #include <linux/string.h>
  27 #include <linux/parser.h>
  28 #include <linux/syscalls.h>
  29 #include <linux/configfs.h>
  30 #include <linux/spinlock.h>
  31
  32 #include <target/target_core_base.h>
  33 #include <target/target_core_backend.h>
  34 #include <target/target_core_fabric.h>
  35
  36 #include "target_core_internal.h"
  37 #include "target_core_alua.h"
  38 #include "target_core_pr.h"
  39 #include "target_core_rd.h"
  40 #include "target_core_xcopy.h"
  41
  42 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs)              \
  43 static void target_core_setup_##_name##_cit(struct target_backend *tb)  \
  44 {                                                                       \
  45         struct config_item_type *cit = &tb->tb_##_name##_cit;           \
  46                                                                         \
  47         cit->ct_item_ops = _item_ops;                                   \
  48         cit->ct_group_ops = _group_ops;                                 \
  49         cit->ct_attrs = _attrs;                                         \
  50         cit->ct_owner = tb->ops->owner;                                 \
  51         pr_debug("Setup generic %s\n", __stringify(_name));             \
  52 }
  53
  54 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops)                  \
  55 static void target_core_setup_##_name##_cit(struct target_backend *tb)  \
  56 {                                                                       \
  57         struct config_item_type *cit = &tb->tb_##_name##_cit;           \
  58                                                                         \
  59         cit->ct_item_ops = _item_ops;                                   \
  60         cit->ct_group_ops = _group_ops;                                 \
  61         cit->ct_attrs = tb->ops->tb_##_name##_attrs;                    \
  62         cit->ct_owner = tb->ops->owner;                                 \
  63         pr_debug("Setup generic %s\n", __stringify(_name));             \
  64 }
  65
  66 extern struct t10_alua_lu_gp *default_lu_gp;
  67
  68 static LIST_HEAD(g_tf_list);
  69 static DEFINE_MUTEX(g_tf_lock);
  70
  71 static struct config_group target_core_hbagroup;
  72 static struct config_group alua_group;
  73 static struct config_group alua_lu_gps_group;
  74
  75 static inline struct se_hba *
  76 item_to_hba(struct config_item *item)
  77 {
  78         return container_of(to_config_group(item), struct se_hba, hba_group);
  79 }
  80
  81 /*
  82  * Attributes for /sys/kernel/config/target/
  83  */
  84 static ssize_t target_core_item_version_show(struct config_item *item,
  85                 char *page)
  86 {
  87         return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
  88                 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION,
  89                 utsname()->sysname, utsname()->machine);
  90 }
  91
  92 CONFIGFS_ATTR_RO(target_core_item_, version);
  93
  94 char db_root[DB_ROOT_LEN] = DB_ROOT_DEFAULT;
  95 static char db_root_stage[DB_ROOT_LEN];
  96
  97 static ssize_t target_core_item_dbroot_show(struct config_item *item,
  98                                             char *page)
  99 {
 100         return sprintf(page, "%s\n", db_root);
 101 }
 102
 103 static ssize_t target_core_item_dbroot_store(struct config_item *item,
 104                                         const char *page, size_t count)
 105 {
 106         ssize_t read_bytes;
 107         struct file *fp;
 108
 109         mutex_lock(&g_tf_lock);
 110         if (!list_empty(&g_tf_list)) {
 111                 mutex_unlock(&g_tf_lock);
 112                 pr_err("db_root: cannot be changed: target drivers registered");
 113                 return -EINVAL;
 114         }
 115
 116         if (count > (DB_ROOT_LEN - 1)) {
 117                 mutex_unlock(&g_tf_lock);
 118                 pr_err("db_root: count %d exceeds DB_ROOT_LEN-1: %u\n",
 119                        (int)count, DB_ROOT_LEN - 1);
 120                 return -EINVAL;
 121         }
 122
 123         read_bytes = snprintf(db_root_stage, DB_ROOT_LEN, "%s", page);
 124         if (!read_bytes) {
 125                 mutex_unlock(&g_tf_lock);
 126                 return -EINVAL;
 127         }
 128         if (db_root_stage[read_bytes - 1] == '\n')
 129                 db_root_stage[read_bytes - 1] = '\0';
 130
 131         /* validate new db root before accepting it */
 132         fp = filp_open(db_root_stage, O_RDONLY, 0);
 133         if (IS_ERR(fp)) {
 134                 mutex_unlock(&g_tf_lock);
 135                 pr_err("db_root: cannot open: %s\n", db_root_stage);
 136                 return -EINVAL;
 137         }
 138         if (!S_ISDIR(file_inode(fp)->i_mode)) {
 139                 filp_close(fp, NULL);
 140                 mutex_unlock(&g_tf_lock);
 141                 pr_err("db_root: not a directory: %s\n", db_root_stage);
 142                 return -EINVAL;
 143         }
 144         filp_close(fp, NULL);
 145
 146         strncpy(db_root, db_root_stage, read_bytes);
 147
 148         mutex_unlock(&g_tf_lock);
 149
 150         pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
 151
 152         return read_bytes;
 153 }
 154
 155 CONFIGFS_ATTR(target_core_item_, dbroot);
 156
 157 static struct target_fabric_configfs *target_core_get_fabric(
 158         const char *name)
 159 {
 160         struct target_fabric_configfs *tf;
 161
 162         if (!name)
 163                 return NULL;
 164
 165         mutex_lock(&g_tf_lock);
 166         list_for_each_entry(tf, &g_tf_list, tf_list) {
 167                 const char *cmp_name = tf->tf_ops->fabric_alias;
 168                 if (!cmp_name)
 169                         cmp_name = tf->tf_ops->fabric_name;
 170                 if (!strcmp(cmp_name, name)) {
 171                         atomic_inc(&tf->tf_access_cnt);
 172                         mutex_unlock(&g_tf_lock);
 173                         return tf;
 174                 }
 175         }
 176         mutex_unlock(&g_tf_lock);
 177
 178         return NULL;
 179 }
 180
 181 /*
 182  * Called from struct target_core_group_ops->make_group()
 183  */
 184 static struct config_group *target_core_register_fabric(
 185         struct config_group *group,
 186         const char *name)
 187 {
 188         struct target_fabric_configfs *tf;
 189         int ret;
 190
 191         pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
 192                         " %s\n", group, name);
 193
 194         tf = target_core_get_fabric(name);
 195         if (!tf) {
 196                 pr_debug("target_core_register_fabric() trying autoload for %s\n",
 197                          name);
 198
 199                 /*
 200                  * Below are some hardcoded request_module() calls to automatically
 201                  * local fabric modules when the following is called:
 202                  *
 203                  * mkdir -p /sys/kernel/config/target/$MODULE_NAME
 204                  *
 205                  * Note that this does not limit which TCM fabric module can be
 206                  * registered, but simply provids auto loading logic for modules with
 207                  * mkdir(2) system calls with known TCM fabric modules.
 208                  */
 209
 210                 if (!strncmp(name, "iscsi", 5)) {
 211                         /*
 212                          * Automatically load the LIO Target fabric module when the
 213                          * following is called:
 214                          *
 215                          * mkdir -p $CONFIGFS/target/iscsi
 216                          */
 217                         ret = request_module("iscsi_target_mod");
 218                         if (ret < 0) {
 219                                 pr_debug("request_module() failed for"
 220                                          " iscsi_target_mod.ko: %d\n", ret);
 221                                 return ERR_PTR(-EINVAL);
 222                         }
 223                 } else if (!strncmp(name, "loopback", 8)) {
 224                         /*
 225                          * Automatically load the tcm_loop fabric module when the
 226                          * following is called:
 227                          *
 228                          * mkdir -p $CONFIGFS/target/loopback
 229                          */
 230                         ret = request_module("tcm_loop");
 231                         if (ret < 0) {
 232                                 pr_debug("request_module() failed for"
 233                                          " tcm_loop.ko: %d\n", ret);
 234                                 return ERR_PTR(-EINVAL);
 235                         }
 236                 }
 237
 238                 tf = target_core_get_fabric(name);
 239         }
 240
 241         if (!tf) {
 242                 pr_debug("target_core_get_fabric() failed for %s\n",
 243                          name);
 244                 return ERR_PTR(-EINVAL);
 245         }
 246         pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
 247                         " %s\n", tf->tf_ops->fabric_name);
 248         /*
 249          * On a successful target_core_get_fabric() look, the returned
 250          * struct target_fabric_configfs *tf will contain a usage reference.
 251          */
 252         pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
 253                         &tf->tf_wwn_cit);
 254
 255         config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit);
 256
 257         config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
 258                         &tf->tf_discovery_cit);
 259         configfs_add_default_group(&tf->tf_disc_group, &tf->tf_group);
 260
 261         pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric: %s\n",
 262                  config_item_name(&tf->tf_group.cg_item));
 263         return &tf->tf_group;
 264 }
 265
 266 /*
 267  * Called from struct target_core_group_ops->drop_item()
 268  */
 269 static void target_core_deregister_fabric(
 270         struct config_group *group,
 271         struct config_item *item)
 272 {
 273         struct target_fabric_configfs *tf = container_of(
 274                 to_config_group(item), struct target_fabric_configfs, tf_group);
 275
 276         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
 277                 " tf list\n", config_item_name(item));
 278
 279         pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
 280                         " %s\n", tf->tf_ops->fabric_name);
 281         atomic_dec(&tf->tf_access_cnt);
 282
 283         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
 284                         " %s\n", config_item_name(item));
 285
 286         configfs_remove_default_groups(&tf->tf_group);
 287         config_item_put(item);
 288 }
 289
 290 static struct configfs_group_operations target_core_fabric_group_ops = {
 291         .make_group     = &target_core_register_fabric,
 292         .drop_item      = &target_core_deregister_fabric,
 293 };
 294
 295 /*
 296  * All item attributes appearing in /sys/kernel/target/ appear here.
 297  */
 298 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
 299         &target_core_item_attr_version,
 300         &target_core_item_attr_dbroot,
 301         NULL,
 302 };
 303
 304 /*
 305  * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
 306  */
 307 static const struct config_item_type target_core_fabrics_item = {
 308         .ct_group_ops   = &target_core_fabric_group_ops,
 309         .ct_attrs       = target_core_fabric_item_attrs,
 310         .ct_owner       = THIS_MODULE,
 311 };
 312
 313 static struct configfs_subsystem target_core_fabrics = {
 314         .su_group = {
 315                 .cg_item = {
 316                         .ci_namebuf = "target",
 317                         .ci_type = &target_core_fabrics_item,
 318                 },
 319         },
 320 };
 321
 322 int target_depend_item(struct config_item *item)
 323 {
 324         return configfs_depend_item(&target_core_fabrics, item);
 325 }
 326 EXPORT_SYMBOL(target_depend_item);
 327
 328 void target_undepend_item(struct config_item *item)
 329 {
 330         return configfs_undepend_item(item);
 331 }
 332 EXPORT_SYMBOL(target_undepend_item);
 333
 334 /*##############################################################################
 335 // Start functions called by external Target Fabrics Modules
 336 //############################################################################*/
 337
 338 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
 339 {
 340         if (tfo->fabric_alias) {
 341                 if (strlen(tfo->fabric_alias) >= TARGET_FABRIC_NAME_SIZE) {
 342                         pr_err("Passed alias: %s exceeds "
 343                                 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_alias);
 344                         return -EINVAL;
 345                 }
 346         }
 347         if (!tfo->fabric_name) {
 348                 pr_err("Missing tfo->fabric_name\n");
 349                 return -EINVAL;
 350         }
 351         if (strlen(tfo->fabric_name) >= TARGET_FABRIC_NAME_SIZE) {
 352                 pr_err("Passed name: %s exceeds "
 353                         "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_name);
 354                 return -EINVAL;
 355         }
 356         if (!tfo->tpg_get_wwn) {
 357                 pr_err("Missing tfo->tpg_get_wwn()\n");
 358                 return -EINVAL;
 359         }
 360         if (!tfo->tpg_get_tag) {
 361                 pr_err("Missing tfo->tpg_get_tag()\n");
 362                 return -EINVAL;
 363         }
 364         if (!tfo->tpg_check_demo_mode) {
 365                 pr_err("Missing tfo->tpg_check_demo_mode()\n");
 366                 return -EINVAL;
 367         }
 368         if (!tfo->tpg_check_demo_mode_cache) {
 369                 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
 370                 return -EINVAL;
 371         }
 372         if (!tfo->tpg_check_demo_mode_write_protect) {
 373                 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
 374                 return -EINVAL;
 375         }
 376         if (!tfo->tpg_check_prod_mode_write_protect) {
 377                 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
 378                 return -EINVAL;
 379         }
 380         if (!tfo->tpg_get_inst_index) {
 381                 pr_err("Missing tfo->tpg_get_inst_index()\n");
 382                 return -EINVAL;
 383         }
 384         if (!tfo->release_cmd) {
 385                 pr_err("Missing tfo->release_cmd()\n");
 386                 return -EINVAL;
 387         }
 388         if (!tfo->sess_get_index) {
 389                 pr_err("Missing tfo->sess_get_index()\n");
 390                 return -EINVAL;
 391         }
 392         if (!tfo->write_pending) {
 393                 pr_err("Missing tfo->write_pending()\n");
 394                 return -EINVAL;
 395         }
 396         if (!tfo->set_default_node_attributes) {
 397                 pr_err("Missing tfo->set_default_node_attributes()\n");
 398                 return -EINVAL;
 399         }
 400         if (!tfo->get_cmd_state) {
 401                 pr_err("Missing tfo->get_cmd_state()\n");
 402                 return -EINVAL;
 403         }
 404         if (!tfo->queue_data_in) {
 405                 pr_err("Missing tfo->queue_data_in()\n");
 406                 return -EINVAL;
 407         }
 408         if (!tfo->queue_status) {
 409                 pr_err("Missing tfo->queue_status()\n");
 410                 return -EINVAL;
 411         }
 412         if (!tfo->queue_tm_rsp) {
 413                 pr_err("Missing tfo->queue_tm_rsp()\n");
 414                 return -EINVAL;
 415         }
 416         if (!tfo->aborted_task) {
 417                 pr_err("Missing tfo->aborted_task()\n");
 418                 return -EINVAL;
 419         }
 420         if (!tfo->check_stop_free) {
 421                 pr_err("Missing tfo->check_stop_free()\n");
 422                 return -EINVAL;
 423         }
 424         /*
 425          * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
 426          * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
 427          * target_core_fabric_configfs.c WWN+TPG group context code.
 428          */
 429         if (!tfo->fabric_make_wwn) {
 430                 pr_err("Missing tfo->fabric_make_wwn()\n");
 431                 return -EINVAL;
 432         }
 433         if (!tfo->fabric_drop_wwn) {
 434                 pr_err("Missing tfo->fabric_drop_wwn()\n");
 435                 return -EINVAL;
 436         }
 437         if (!tfo->fabric_make_tpg) {
 438                 pr_err("Missing tfo->fabric_make_tpg()\n");
 439                 return -EINVAL;
 440         }
 441         if (!tfo->fabric_drop_tpg) {
 442                 pr_err("Missing tfo->fabric_drop_tpg()\n");
 443                 return -EINVAL;
 444         }
 445
 446         return 0;
 447 }
 448
 449 int target_register_template(const struct target_core_fabric_ops *fo)
 450 {
 451         struct target_fabric_configfs *tf;
 452         int ret;
 453
 454         ret = target_fabric_tf_ops_check(fo);
 455         if (ret)
 456                 return ret;
 457
 458         tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
 459         if (!tf) {
 460                 pr_err("%s: could not allocate memory!\n", __func__);
 461                 return -ENOMEM;
 462         }
 463
 464         INIT_LIST_HEAD(&tf->tf_list);
 465         atomic_set(&tf->tf_access_cnt, 0);
 466         tf->tf_ops = fo;
 467         target_fabric_setup_cits(tf);
 468
 469         mutex_lock(&g_tf_lock);
 470         list_add_tail(&tf->tf_list, &g_tf_list);
 471         mutex_unlock(&g_tf_lock);
 472
 473         return 0;
 474 }
 475 EXPORT_SYMBOL(target_register_template);
 476
 477 void target_unregister_template(const struct target_core_fabric_ops *fo)
 478 {
 479         struct target_fabric_configfs *t;
 480
 481         mutex_lock(&g_tf_lock);
 482         list_for_each_entry(t, &g_tf_list, tf_list) {
 483                 if (!strcmp(t->tf_ops->fabric_name, fo->fabric_name)) {
 484                         BUG_ON(atomic_read(&t->tf_access_cnt));
 485                         list_del(&t->tf_list);
 486                         mutex_unlock(&g_tf_lock);
 487                         /*
 488                          * Wait for any outstanding fabric se_deve_entry->rcu_head
 489                          * callbacks to complete post kfree_rcu(), before allowing
 490                          * fabric driver unload of TFO->module to proceed.
 491                          */
 492                         rcu_barrier();
 493                         kfree(t);
 494                         return;
 495                 }
 496         }
 497         mutex_unlock(&g_tf_lock);
 498 }
 499 EXPORT_SYMBOL(target_unregister_template);
 500
 501 /*##############################################################################
 502 // Stop functions called by external Target Fabrics Modules
 503 //############################################################################*/
 504
 505 static inline struct se_dev_attrib *to_attrib(struct config_item *item)
 506 {
 507         return container_of(to_config_group(item), struct se_dev_attrib,
 508                         da_group);
 509 }
 510
 511 /* Start functions for struct config_item_type tb_dev_attrib_cit */
 512 #define DEF_CONFIGFS_ATTRIB_SHOW(_name)                                 \
 513 static ssize_t _name##_show(struct config_item *item, char *page)       \
 514 {                                                                       \
 515         return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \
 516 }
 517
 518 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias);
 519 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo);
 520 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write);
 521 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read);
 522 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache);
 523 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl);
 524 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas);
 525 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu);
 526 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws);
 527 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw);
 528 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc);
 529 DEF_CONFIGFS_ATTRIB_SHOW(emulate_pr);
 530 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type);
 531 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type);
 532 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify);
 533 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids);
 534 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot);
 535 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord);
 536 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl);
 537 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size);
 538 DEF_CONFIGFS_ATTRIB_SHOW(block_size);
 539 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors);
 540 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors);
 541 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth);
 542 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth);
 543 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count);
 544 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count);
 545 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity);
 546 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment);
 547 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data);
 548 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len);
 549
 550 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name)                            \
 551 static ssize_t _name##_store(struct config_item *item, const char *page,\
 552                 size_t count)                                           \
 553 {                                                                       \
 554         struct se_dev_attrib *da = to_attrib(item);                     \
 555         u32 val;                                                        \
 556         int ret;                                                        \
 557                                                                         \
 558         ret = kstrtou32(page, 0, &val);                                 \
 559         if (ret < 0)                                                    \
 560                 return ret;                                             \
 561         da->_name = val;                                                \
 562         return count;                                                   \
 563 }
 564
 565 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count);
 566 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count);
 567 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity);
 568 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment);
 569 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len);
 570
 571 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name)                           \
 572 static ssize_t _name##_store(struct config_item *item, const char *page,        \
 573                 size_t count)                                           \
 574 {                                                                       \
 575         struct se_dev_attrib *da = to_attrib(item);                     \
 576         bool flag;                                                      \
 577         int ret;                                                        \
 578                                                                         \
 579         ret = strtobool(page, &flag);                                   \
 580         if (ret < 0)                                                    \
 581                 return ret;                                             \
 582         da->_name = flag;                                               \
 583         return count;                                                   \
 584 }
 585
 586 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write);
 587 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw);
 588 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc);
 589 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr);
 590 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids);
 591 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot);
 592
 593 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name)                           \
 594 static ssize_t _name##_store(struct config_item *item, const char *page,\
 595                 size_t count)                                           \
 596 {                                                                       \
 597         printk_once(KERN_WARNING                                        \
 598                 "ignoring deprecated %s attribute\n",                   \
 599                 __stringify(_name));                                    \
 600         return count;                                                   \
 601 }
 602
 603 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo);
 604 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read);
 605
 606 static void dev_set_t10_wwn_model_alias(struct se_device *dev)
 607 {
 608         const char *configname;
 609
 610         configname = config_item_name(&dev->dev_group.cg_item);
 611         if (strlen(configname) >= INQUIRY_MODEL_LEN) {
 612                 pr_warn("dev[%p]: Backstore name '%s' is too long for "
 613                         "INQUIRY_MODEL, truncating to 15 characters\n", dev,
 614                         configname);
 615         }
 616         /*
 617          * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1)
 618          * here without potentially breaking existing setups, so continue to
 619          * truncate one byte shorter than what can be carried in INQUIRY.
 620          */
 621         strlcpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN);
 622 }
 623
 624 static ssize_t emulate_model_alias_store(struct config_item *item,
 625                 const char *page, size_t count)
 626 {
 627         struct se_dev_attrib *da = to_attrib(item);
 628         struct se_device *dev = da->da_dev;
 629         bool flag;
 630         int ret;
 631
 632         if (dev->export_count) {
 633                 pr_err("dev[%p]: Unable to change model alias"
 634                         " while export_count is %d\n",
 635                         dev, dev->export_count);
 636                 return -EINVAL;
 637         }
 638
 639         ret = strtobool(page, &flag);
 640         if (ret < 0)
 641                 return ret;
 642
 643         BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
 644         if (flag) {
 645                 dev_set_t10_wwn_model_alias(dev);
 646         } else {
 647                 strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod,
 648                         sizeof(dev->t10_wwn.model));
 649         }
 650         da->emulate_model_alias = flag;
 651         return count;
 652 }
 653
 654 static ssize_t emulate_write_cache_store(struct config_item *item,
 655                 const char *page, size_t count)
 656 {
 657         struct se_dev_attrib *da = to_attrib(item);
 658         bool flag;
 659         int ret;
 660
 661         ret = strtobool(page, &flag);
 662         if (ret < 0)
 663                 return ret;
 664
 665         if (flag && da->da_dev->transport->get_write_cache) {
 666                 pr_err("emulate_write_cache not supported for this device\n");
 667                 return -EINVAL;
 668         }
 669
 670         da->emulate_write_cache = flag;
 671         pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
 672                         da->da_dev, flag);
 673         return count;
 674 }
 675
 676 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item,
 677                 const char *page, size_t count)
 678 {
 679         struct se_dev_attrib *da = to_attrib(item);
 680         u32 val;
 681         int ret;
 682
 683         ret = kstrtou32(page, 0, &val);
 684         if (ret < 0)
 685                 return ret;
 686
 687         if (val != 0 && val != 1 && val != 2) {
 688                 pr_err("Illegal value %d\n", val);
 689                 return -EINVAL;
 690         }
 691
 692         if (da->da_dev->export_count) {
 693                 pr_err("dev[%p]: Unable to change SE Device"
 694                         " UA_INTRLCK_CTRL while export_count is %d\n",
 695                         da->da_dev, da->da_dev->export_count);
 696                 return -EINVAL;
 697         }
 698         da->emulate_ua_intlck_ctrl = val;
 699         pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
 700                 da->da_dev, val);
 701         return count;
 702 }
 703
 704 static ssize_t emulate_tas_store(struct config_item *item,
 705                 const char *page, size_t count)
 706 {
 707         struct se_dev_attrib *da = to_attrib(item);
 708         bool flag;
 709         int ret;
 710
 711         ret = strtobool(page, &flag);
 712         if (ret < 0)
 713                 return ret;
 714
 715         if (da->da_dev->export_count) {
 716                 pr_err("dev[%p]: Unable to change SE Device TAS while"
 717                         " export_count is %d\n",
 718                         da->da_dev, da->da_dev->export_count);
 719                 return -EINVAL;
 720         }
 721         da->emulate_tas = flag;
 722         pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
 723                 da->da_dev, flag ? "Enabled" : "Disabled");
 724
 725         return count;
 726 }
 727
 728 static ssize_t emulate_tpu_store(struct config_item *item,
 729                 const char *page, size_t count)
 730 {
 731         struct se_dev_attrib *da = to_attrib(item);
 732         bool flag;
 733         int ret;
 734
 735         ret = strtobool(page, &flag);
 736         if (ret < 0)
 737                 return ret;
 738
 739         /*
 740          * We expect this value to be non-zero when generic Block Layer
 741          * Discard supported is detected iblock_create_virtdevice().
 742          */
 743         if (flag && !da->max_unmap_block_desc_count) {
 744                 pr_err("Generic Block Discard not supported\n");
 745                 return -ENOSYS;
 746         }
 747
 748         da->emulate_tpu = flag;
 749         pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
 750                 da->da_dev, flag);
 751         return count;
 752 }
 753
 754 static ssize_t emulate_tpws_store(struct config_item *item,
 755                 const char *page, size_t count)
 756 {
 757         struct se_dev_attrib *da = to_attrib(item);
 758         bool flag;
 759         int ret;
 760
 761         ret = strtobool(page, &flag);
 762         if (ret < 0)
 763                 return ret;
 764
 765         /*
 766          * We expect this value to be non-zero when generic Block Layer
 767          * Discard supported is detected iblock_create_virtdevice().
 768          */
 769         if (flag && !da->max_unmap_block_desc_count) {
 770                 pr_err("Generic Block Discard not supported\n");
 771                 return -ENOSYS;
 772         }
 773
 774         da->emulate_tpws = flag;
 775         pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
 776                                 da->da_dev, flag);
 777         return count;
 778 }
 779
 780 static ssize_t pi_prot_type_store(struct config_item *item,
 781                 const char *page, size_t count)
 782 {
 783         struct se_dev_attrib *da = to_attrib(item);
 784         int old_prot = da->pi_prot_type, ret;
 785         struct se_device *dev = da->da_dev;
 786         u32 flag;
 787
 788         ret = kstrtou32(page, 0, &flag);
 789         if (ret < 0)
 790                 return ret;
 791
 792         if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
 793                 pr_err("Illegal value %d for pi_prot_type\n", flag);
 794                 return -EINVAL;
 795         }
 796         if (flag == 2) {
 797                 pr_err("DIF TYPE2 protection currently not supported\n");
 798                 return -ENOSYS;
 799         }
 800         if (da->hw_pi_prot_type) {
 801                 pr_warn("DIF protection enabled on underlying hardware,"
 802                         " ignoring\n");
 803                 return count;
 804         }
 805         if (!dev->transport->init_prot || !dev->transport->free_prot) {
 806                 /* 0 is only allowed value for non-supporting backends */
 807                 if (flag == 0)
 808                         return count;
 809
 810                 pr_err("DIF protection not supported by backend: %s\n",
 811                        dev->transport->name);
 812                 return -ENOSYS;
 813         }
 814         if (!target_dev_configured(dev)) {
 815                 pr_err("DIF protection requires device to be configured\n");
 816                 return -ENODEV;
 817         }
 818         if (dev->export_count) {
 819                 pr_err("dev[%p]: Unable to change SE Device PROT type while"
 820                        " export_count is %d\n", dev, dev->export_count);
 821                 return -EINVAL;
 822         }
 823
 824         da->pi_prot_type = flag;
 825
 826         if (flag && !old_prot) {
 827                 ret = dev->transport->init_prot(dev);
 828                 if (ret) {
 829                         da->pi_prot_type = old_prot;
 830                         da->pi_prot_verify = (bool) da->pi_prot_type;
 831                         return ret;
 832                 }
 833
 834         } else if (!flag && old_prot) {
 835                 dev->transport->free_prot(dev);
 836         }
 837
 838         da->pi_prot_verify = (bool) da->pi_prot_type;
 839         pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
 840         return count;
 841 }
 842
 843 /* always zero, but attr needs to remain RW to avoid userspace breakage */
 844 static ssize_t pi_prot_format_show(struct config_item *item, char *page)
 845 {
 846         return snprintf(page, PAGE_SIZE, "0\n");
 847 }
 848
 849 static ssize_t pi_prot_format_store(struct config_item *item,
 850                 const char *page, size_t count)
 851 {
 852         struct se_dev_attrib *da = to_attrib(item);
 853         struct se_device *dev = da->da_dev;
 854         bool flag;
 855         int ret;
 856
 857         ret = strtobool(page, &flag);
 858         if (ret < 0)
 859                 return ret;
 860
 861         if (!flag)
 862                 return count;
 863
 864         if (!dev->transport->format_prot) {
 865                 pr_err("DIF protection format not supported by backend %s\n",
 866                        dev->transport->name);
 867                 return -ENOSYS;
 868         }
 869         if (!target_dev_configured(dev)) {
 870                 pr_err("DIF protection format requires device to be configured\n");
 871                 return -ENODEV;
 872         }
 873         if (dev->export_count) {
 874                 pr_err("dev[%p]: Unable to format SE Device PROT type while"
 875                        " export_count is %d\n", dev, dev->export_count);
 876                 return -EINVAL;
 877         }
 878
 879         ret = dev->transport->format_prot(dev);
 880         if (ret)
 881                 return ret;
 882
 883         pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
 884         return count;
 885 }
 886
 887 static ssize_t pi_prot_verify_store(struct config_item *item,
 888                 const char *page, size_t count)
 889 {
 890         struct se_dev_attrib *da = to_attrib(item);
 891         bool flag;
 892         int ret;
 893
 894         ret = strtobool(page, &flag);
 895         if (ret < 0)
 896                 return ret;
 897
 898         if (!flag) {
 899                 da->pi_prot_verify = flag;
 900                 return count;
 901         }
 902         if (da->hw_pi_prot_type) {
 903                 pr_warn("DIF protection enabled on underlying hardware,"
 904                         " ignoring\n");
 905                 return count;
 906         }
 907         if (!da->pi_prot_type) {
 908                 pr_warn("DIF protection not supported by backend, ignoring\n");
 909                 return count;
 910         }
 911         da->pi_prot_verify = flag;
 912
 913         return count;
 914 }
 915
 916 static ssize_t force_pr_aptpl_store(struct config_item *item,
 917                 const char *page, size_t count)
 918 {
 919         struct se_dev_attrib *da = to_attrib(item);
 920         bool flag;
 921         int ret;
 922
 923         ret = strtobool(page, &flag);
 924         if (ret < 0)
 925                 return ret;
 926         if (da->da_dev->export_count) {
 927                 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
 928                        " export_count is %d\n",
 929                        da->da_dev, da->da_dev->export_count);
 930                 return -EINVAL;
 931         }
 932
 933         da->force_pr_aptpl = flag;
 934         pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag);
 935         return count;
 936 }
 937
 938 static ssize_t emulate_rest_reord_store(struct config_item *item,
 939                 const char *page, size_t count)
 940 {
 941         struct se_dev_attrib *da = to_attrib(item);
 942         bool flag;
 943         int ret;
 944
 945         ret = strtobool(page, &flag);
 946         if (ret < 0)
 947                 return ret;
 948
 949         if (flag != 0) {
 950                 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted"
 951                         " reordering not implemented\n", da->da_dev);
 952                 return -ENOSYS;
 953         }
 954         da->emulate_rest_reord = flag;
 955         pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
 956                 da->da_dev, flag);
 957         return count;
 958 }
 959
 960 static ssize_t unmap_zeroes_data_store(struct config_item *item,
 961                 const char *page, size_t count)
 962 {
 963         struct se_dev_attrib *da = to_attrib(item);
 964         bool flag;
 965         int ret;
 966
 967         ret = strtobool(page, &flag);
 968         if (ret < 0)
 969                 return ret;
 970
 971         if (da->da_dev->export_count) {
 972                 pr_err("dev[%p]: Unable to change SE Device"
 973                        " unmap_zeroes_data while export_count is %d\n",
 974                        da->da_dev, da->da_dev->export_count);
 975                 return -EINVAL;
 976         }
 977         /*
 978          * We expect this value to be non-zero when generic Block Layer
 979          * Discard supported is detected iblock_configure_device().
 980          */
 981         if (flag && !da->max_unmap_block_desc_count) {
 982                 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set"
 983                        " because max_unmap_block_desc_count is zero\n",
 984                        da->da_dev);
 985                 return -ENOSYS;
 986         }
 987         da->unmap_zeroes_data = flag;
 988         pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n",
 989                  da->da_dev, flag);
 990         return count;
 991 }
 992
 993 /*
 994  * Note, this can only be called on unexported SE Device Object.
 995  */
 996 static ssize_t queue_depth_store(struct config_item *item,
 997                 const char *page, size_t count)
 998 {
 999         struct se_dev_attrib *da = to_attrib(item);
1000         struct se_device *dev = da->da_dev;
1001         u32 val;
1002         int ret;
1003
1004         ret = kstrtou32(page, 0, &val);
1005         if (ret < 0)
1006                 return ret;
1007
1008         if (dev->export_count) {
1009                 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1010                         " export_count is %d\n",
1011                         dev, dev->export_count);
1012                 return -EINVAL;
1013         }
1014         if (!val) {
1015                 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
1016                 return -EINVAL;
1017         }
1018
1019         if (val > dev->dev_attrib.queue_depth) {
1020                 if (val > dev->dev_attrib.hw_queue_depth) {
1021                         pr_err("dev[%p]: Passed queue_depth:"
1022                                 " %u exceeds TCM/SE_Device MAX"
1023                                 " TCQ: %u\n", dev, val,
1024                                 dev->dev_attrib.hw_queue_depth);
1025                         return -EINVAL;
1026                 }
1027         }
1028         da->queue_depth = dev->queue_depth = val;
1029         pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val);
1030         return count;
1031 }
1032
1033 static ssize_t optimal_sectors_store(struct config_item *item,
1034                 const char *page, size_t count)
1035 {
1036         struct se_dev_attrib *da = to_attrib(item);
1037         u32 val;
1038         int ret;
1039
1040         ret = kstrtou32(page, 0, &val);
1041         if (ret < 0)
1042                 return ret;
1043
1044         if (da->da_dev->export_count) {
1045                 pr_err("dev[%p]: Unable to change SE Device"
1046                         " optimal_sectors while export_count is %d\n",
1047                         da->da_dev, da->da_dev->export_count);
1048                 return -EINVAL;
1049         }
1050         if (val > da->hw_max_sectors) {
1051                 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1052                         " greater than hw_max_sectors: %u\n",
1053                         da->da_dev, val, da->hw_max_sectors);
1054                 return -EINVAL;
1055         }
1056
1057         da->optimal_sectors = val;
1058         pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1059                         da->da_dev, val);
1060         return count;
1061 }
1062
1063 static ssize_t block_size_store(struct config_item *item,
1064                 const char *page, size_t count)
1065 {
1066         struct se_dev_attrib *da = to_attrib(item);
1067         u32 val;
1068         int ret;
1069
1070         ret = kstrtou32(page, 0, &val);
1071         if (ret < 0)
1072                 return ret;
1073
1074         if (da->da_dev->export_count) {
1075                 pr_err("dev[%p]: Unable to change SE Device block_size"
1076                         " while export_count is %d\n",
1077                         da->da_dev, da->da_dev->export_count);
1078                 return -EINVAL;
1079         }
1080
1081         if (val != 512 && val != 1024 && val != 2048 && val != 4096) {
1082                 pr_err("dev[%p]: Illegal value for block_device: %u"
1083                         " for SE device, must be 512, 1024, 2048 or 4096\n",
1084                         da->da_dev, val);
1085                 return -EINVAL;
1086         }
1087
1088         da->block_size = val;
1089         if (da->max_bytes_per_io)
1090                 da->hw_max_sectors = da->max_bytes_per_io / val;
1091
1092         pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1093                         da->da_dev, val);
1094         return count;
1095 }
1096
1097 static ssize_t alua_support_show(struct config_item *item, char *page)
1098 {
1099         struct se_dev_attrib *da = to_attrib(item);
1100         u8 flags = da->da_dev->transport->transport_flags;
1101
1102         return snprintf(page, PAGE_SIZE, "%d\n",
1103                         flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1);
1104 }
1105
1106 static ssize_t pgr_support_show(struct config_item *item, char *page)
1107 {
1108         struct se_dev_attrib *da = to_attrib(item);
1109         u8 flags = da->da_dev->transport->transport_flags;
1110
1111         return snprintf(page, PAGE_SIZE, "%d\n",
1112                         flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1);
1113 }
1114
1115 CONFIGFS_ATTR(, emulate_model_alias);
1116 CONFIGFS_ATTR(, emulate_dpo);
1117 CONFIGFS_ATTR(, emulate_fua_write);
1118 CONFIGFS_ATTR(, emulate_fua_read);
1119 CONFIGFS_ATTR(, emulate_write_cache);
1120 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl);
1121 CONFIGFS_ATTR(, emulate_tas);
1122 CONFIGFS_ATTR(, emulate_tpu);
1123 CONFIGFS_ATTR(, emulate_tpws);
1124 CONFIGFS_ATTR(, emulate_caw);
1125 CONFIGFS_ATTR(, emulate_3pc);
1126 CONFIGFS_ATTR(, emulate_pr);
1127 CONFIGFS_ATTR(, pi_prot_type);
1128 CONFIGFS_ATTR_RO(, hw_pi_prot_type);
1129 CONFIGFS_ATTR(, pi_prot_format);
1130 CONFIGFS_ATTR(, pi_prot_verify);
1131 CONFIGFS_ATTR(, enforce_pr_isids);
1132 CONFIGFS_ATTR(, is_nonrot);
1133 CONFIGFS_ATTR(, emulate_rest_reord);
1134 CONFIGFS_ATTR(, force_pr_aptpl);
1135 CONFIGFS_ATTR_RO(, hw_block_size);
1136 CONFIGFS_ATTR(, block_size);
1137 CONFIGFS_ATTR_RO(, hw_max_sectors);
1138 CONFIGFS_ATTR(, optimal_sectors);
1139 CONFIGFS_ATTR_RO(, hw_queue_depth);
1140 CONFIGFS_ATTR(, queue_depth);
1141 CONFIGFS_ATTR(, max_unmap_lba_count);
1142 CONFIGFS_ATTR(, max_unmap_block_desc_count);
1143 CONFIGFS_ATTR(, unmap_granularity);
1144 CONFIGFS_ATTR(, unmap_granularity_alignment);
1145 CONFIGFS_ATTR(, unmap_zeroes_data);
1146 CONFIGFS_ATTR(, max_write_same_len);
1147 CONFIGFS_ATTR_RO(, alua_support);
1148 CONFIGFS_ATTR_RO(, pgr_support);
1149
1150 /*
1151  * dev_attrib attributes for devices using the target core SBC/SPC
1152  * interpreter.  Any backend using spc_parse_cdb should be using
1153  * these.
1154  */
1155 struct configfs_attribute *sbc_attrib_attrs[] = {
1156         &attr_emulate_model_alias,
1157         &attr_emulate_dpo,
1158         &attr_emulate_fua_write,
1159         &attr_emulate_fua_read,
1160         &attr_emulate_write_cache,
1161         &attr_emulate_ua_intlck_ctrl,
1162         &attr_emulate_tas,
1163         &attr_emulate_tpu,
1164         &attr_emulate_tpws,
1165         &attr_emulate_caw,
1166         &attr_emulate_3pc,
1167         &attr_emulate_pr,
1168         &attr_pi_prot_type,
1169         &attr_hw_pi_prot_type,
1170         &attr_pi_prot_format,
1171         &attr_pi_prot_verify,
1172         &attr_enforce_pr_isids,
1173         &attr_is_nonrot,
1174         &attr_emulate_rest_reord,
1175         &attr_force_pr_aptpl,
1176         &attr_hw_block_size,
1177         &attr_block_size,
1178         &attr_hw_max_sectors,
1179         &attr_optimal_sectors,
1180         &attr_hw_queue_depth,
1181         &attr_queue_depth,
1182         &attr_max_unmap_lba_count,
1183         &attr_max_unmap_block_desc_count,
1184         &attr_unmap_granularity,
1185         &attr_unmap_granularity_alignment,
1186         &attr_unmap_zeroes_data,
1187         &attr_max_write_same_len,
1188         &attr_alua_support,
1189         &attr_pgr_support,
1190         NULL,
1191 };
1192 EXPORT_SYMBOL(sbc_attrib_attrs);
1193
1194 /*
1195  * Minimal dev_attrib attributes for devices passing through CDBs.
1196  * In this case we only provide a few read-only attributes for
1197  * backwards compatibility.
1198  */
1199 struct configfs_attribute *passthrough_attrib_attrs[] = {
1200         &attr_hw_pi_prot_type,
1201         &attr_hw_block_size,
1202         &attr_hw_max_sectors,
1203         &attr_hw_queue_depth,
1204         &attr_alua_support,
1205         &attr_pgr_support,
1206         NULL,
1207 };
1208 EXPORT_SYMBOL(passthrough_attrib_attrs);
1209
1210 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL);
1211 TB_CIT_SETUP_DRV(dev_action, NULL, NULL);
1212
1213 /* End functions for struct config_item_type tb_dev_attrib_cit */
1214
1215 /*  Start functions for struct config_item_type tb_dev_wwn_cit */
1216
1217 static struct t10_wwn *to_t10_wwn(struct config_item *item)
1218 {
1219         return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group);
1220 }
1221
1222 static ssize_t target_check_inquiry_data(char *buf)
1223 {
1224         size_t len;
1225         int i;
1226
1227         len = strlen(buf);
1228
1229         /*
1230          * SPC 4.3.1:
1231          * ASCII data fields shall contain only ASCII printable characters
1232          * (i.e., code values 20h to 7Eh) and may be terminated with one or
1233          * more ASCII null (00h) characters.
1234          */
1235         for (i = 0; i < len; i++) {
1236                 if (buf[i] < 0x20 || buf[i] > 0x7E) {
1237                         pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n");
1238                         return -EINVAL;
1239                 }
1240         }
1241
1242         return len;
1243 }
1244
1245 /*
1246  * STANDARD and VPD page 0x83 T10 Vendor Identification
1247  */
1248 static ssize_t target_wwn_vendor_id_show(struct config_item *item,
1249                 char *page)
1250 {
1251         return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]);
1252 }
1253
1254 static ssize_t target_wwn_vendor_id_store(struct config_item *item,
1255                 const char *page, size_t count)
1256 {
1257         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1258         struct se_device *dev = t10_wwn->t10_dev;
1259         /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1260         unsigned char buf[INQUIRY_VENDOR_LEN + 2];
1261         char *stripped = NULL;
1262         size_t len;
1263         ssize_t ret;
1264
1265         len = strlcpy(buf, page, sizeof(buf));
1266         if (len < sizeof(buf)) {
1267                 /* Strip any newline added from userspace. */
1268                 stripped = strstrip(buf);
1269                 len = strlen(stripped);
1270         }
1271         if (len > INQUIRY_VENDOR_LEN) {
1272                 pr_err("Emulated T10 Vendor Identification exceeds"
1273                         " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN)
1274                         "\n");
1275                 return -EOVERFLOW;
1276         }
1277
1278         ret = target_check_inquiry_data(stripped);
1279
1280         if (ret < 0)
1281                 return ret;
1282
1283         /*
1284          * Check to see if any active exports exist.  If they do exist, fail
1285          * here as changing this information on the fly (underneath the
1286          * initiator side OS dependent multipath code) could cause negative
1287          * effects.
1288          */
1289         if (dev->export_count) {
1290                 pr_err("Unable to set T10 Vendor Identification while"
1291                         " active %d exports exist\n", dev->export_count);
1292                 return -EINVAL;
1293         }
1294
1295         BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1);
1296         strlcpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor));
1297
1298         pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:"
1299                  " %s\n", dev->t10_wwn.vendor);
1300
1301         return count;
1302 }
1303
1304 static ssize_t target_wwn_product_id_show(struct config_item *item,
1305                 char *page)
1306 {
1307         return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]);
1308 }
1309
1310 static ssize_t target_wwn_product_id_store(struct config_item *item,
1311                 const char *page, size_t count)
1312 {
1313         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1314         struct se_device *dev = t10_wwn->t10_dev;
1315         /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1316         unsigned char buf[INQUIRY_MODEL_LEN + 2];
1317         char *stripped = NULL;
1318         size_t len;
1319         ssize_t ret;
1320
1321         len = strlcpy(buf, page, sizeof(buf));
1322         if (len < sizeof(buf)) {
1323                 /* Strip any newline added from userspace. */
1324                 stripped = strstrip(buf);
1325                 len = strlen(stripped);
1326         }
1327         if (len > INQUIRY_MODEL_LEN) {
1328                 pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: "
1329                          __stringify(INQUIRY_MODEL_LEN)
1330                         "\n");
1331                 return -EOVERFLOW;
1332         }
1333
1334         ret = target_check_inquiry_data(stripped);
1335
1336         if (ret < 0)
1337                 return ret;
1338
1339         /*
1340          * Check to see if any active exports exist.  If they do exist, fail
1341          * here as changing this information on the fly (underneath the
1342          * initiator side OS dependent multipath code) could cause negative
1343          * effects.
1344          */
1345         if (dev->export_count) {
1346                 pr_err("Unable to set T10 Model while active %d exports exist\n",
1347                         dev->export_count);
1348                 return -EINVAL;
1349         }
1350
1351         BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
1352         strlcpy(dev->t10_wwn.model, stripped, sizeof(dev->t10_wwn.model));
1353
1354         pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n",
1355                  dev->t10_wwn.model);
1356
1357         return count;
1358 }
1359
1360 static ssize_t target_wwn_revision_show(struct config_item *item,
1361                 char *page)
1362 {
1363         return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]);
1364 }
1365
1366 static ssize_t target_wwn_revision_store(struct config_item *item,
1367                 const char *page, size_t count)
1368 {
1369         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1370         struct se_device *dev = t10_wwn->t10_dev;
1371         /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1372         unsigned char buf[INQUIRY_REVISION_LEN + 2];
1373         char *stripped = NULL;
1374         size_t len;
1375         ssize_t ret;
1376
1377         len = strlcpy(buf, page, sizeof(buf));
1378         if (len < sizeof(buf)) {
1379                 /* Strip any newline added from userspace. */
1380                 stripped = strstrip(buf);
1381                 len = strlen(stripped);
1382         }
1383         if (len > INQUIRY_REVISION_LEN) {
1384                 pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: "
1385                          __stringify(INQUIRY_REVISION_LEN)
1386                         "\n");
1387                 return -EOVERFLOW;
1388         }
1389
1390         ret = target_check_inquiry_data(stripped);
1391
1392         if (ret < 0)
1393                 return ret;
1394
1395         /*
1396          * Check to see if any active exports exist.  If they do exist, fail
1397          * here as changing this information on the fly (underneath the
1398          * initiator side OS dependent multipath code) could cause negative
1399          * effects.
1400          */
1401         if (dev->export_count) {
1402                 pr_err("Unable to set T10 Revision while active %d exports exist\n",
1403                         dev->export_count);
1404                 return -EINVAL;
1405         }
1406
1407         BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1);
1408         strlcpy(dev->t10_wwn.revision, stripped, sizeof(dev->t10_wwn.revision));
1409
1410         pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n",
1411                  dev->t10_wwn.revision);
1412
1413         return count;
1414 }
1415
1416 /*
1417  * VPD page 0x80 Unit serial
1418  */
1419 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item,
1420                 char *page)
1421 {
1422         return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1423                 &to_t10_wwn(item)->unit_serial[0]);
1424 }
1425
1426 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item,
1427                 const char *page, size_t count)
1428 {
1429         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1430         struct se_device *dev = t10_wwn->t10_dev;
1431         unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
1432
1433         /*
1434          * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1435          * from the struct scsi_device level firmware, do not allow
1436          * VPD Unit Serial to be emulated.
1437          *
1438          * Note this struct scsi_device could also be emulating VPD
1439          * information from its drivers/scsi LLD.  But for now we assume
1440          * it is doing 'the right thing' wrt a world wide unique
1441          * VPD Unit Serial Number that OS dependent multipath can depend on.
1442          */
1443         if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
1444                 pr_err("Underlying SCSI device firmware provided VPD"
1445                         " Unit Serial, ignoring request\n");
1446                 return -EOPNOTSUPP;
1447         }
1448
1449         if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
1450                 pr_err("Emulated VPD Unit Serial exceeds"
1451                 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1452                 return -EOVERFLOW;
1453         }
1454         /*
1455          * Check to see if any active $FABRIC_MOD exports exist.  If they
1456          * do exist, fail here as changing this information on the fly
1457          * (underneath the initiator side OS dependent multipath code)
1458          * could cause negative effects.
1459          */
1460         if (dev->export_count) {
1461                 pr_err("Unable to set VPD Unit Serial while"
1462                         " active %d $FABRIC_MOD exports exist\n",
1463                         dev->export_count);
1464                 return -EINVAL;
1465         }
1466
1467         /*
1468          * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1469          *
1470          * Also, strip any newline added from the userspace
1471          * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1472          */
1473         memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
1474         snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
1475         snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
1476                         "%s", strstrip(buf));
1477         dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
1478
1479         pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1480                         " %s\n", dev->t10_wwn.unit_serial);
1481
1482         return count;
1483 }
1484
1485 /*
1486  * VPD page 0x83 Protocol Identifier
1487  */
1488 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item,
1489                 char *page)
1490 {
1491         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1492         struct t10_vpd *vpd;
1493         unsigned char buf[VPD_TMP_BUF_SIZE];
1494         ssize_t len = 0;
1495
1496         memset(buf, 0, VPD_TMP_BUF_SIZE);
1497
1498         spin_lock(&t10_wwn->t10_vpd_lock);
1499         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
1500                 if (!vpd->protocol_identifier_set)
1501                         continue;
1502
1503                 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1504
1505                 if (len + strlen(buf) >= PAGE_SIZE)
1506                         break;
1507
1508                 len += sprintf(page+len, "%s", buf);
1509         }
1510         spin_unlock(&t10_wwn->t10_vpd_lock);
1511
1512         return len;
1513 }
1514
1515 /*
1516  * Generic wrapper for dumping VPD identifiers by association.
1517  */
1518 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc)                           \
1519 static ssize_t target_wwn_##_name##_show(struct config_item *item,      \
1520                 char *page)                                             \
1521 {                                                                       \
1522         struct t10_wwn *t10_wwn = to_t10_wwn(item);                     \
1523         struct t10_vpd *vpd;                                            \
1524         unsigned char buf[VPD_TMP_BUF_SIZE];                            \
1525         ssize_t len = 0;                                                \
1526                                                                         \
1527         spin_lock(&t10_wwn->t10_vpd_lock);                              \
1528         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {    \
1529                 if (vpd->association != _assoc)                         \
1530                         continue;                                       \
1531                                                                         \
1532                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
1533                 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE);   \
1534                 if (len + strlen(buf) >= PAGE_SIZE)                     \
1535                         break;                                          \
1536                 len += sprintf(page+len, "%s", buf);                    \
1537                                                                         \
1538                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
1539                 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1540                 if (len + strlen(buf) >= PAGE_SIZE)                     \
1541                         break;                                          \
1542                 len += sprintf(page+len, "%s", buf);                    \
1543                                                                         \
1544                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
1545                 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1546                 if (len + strlen(buf) >= PAGE_SIZE)                     \
1547                         break;                                          \
1548                 len += sprintf(page+len, "%s", buf);                    \
1549         }                                                               \
1550         spin_unlock(&t10_wwn->t10_vpd_lock);                            \
1551                                                                         \
1552         return len;                                                     \
1553 }
1554
1555 /* VPD page 0x83 Association: Logical Unit */
1556 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1557 /* VPD page 0x83 Association: Target Port */
1558 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1559 /* VPD page 0x83 Association: SCSI Target Device */
1560 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1561
1562 CONFIGFS_ATTR(target_wwn_, vendor_id);
1563 CONFIGFS_ATTR(target_wwn_, product_id);
1564 CONFIGFS_ATTR(target_wwn_, revision);
1565 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial);
1566 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier);
1567 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit);
1568 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port);
1569 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device);
1570
1571 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1572         &target_wwn_attr_vendor_id,
1573         &target_wwn_attr_product_id,
1574         &target_wwn_attr_revision,
1575         &target_wwn_attr_vpd_unit_serial,
1576         &target_wwn_attr_vpd_protocol_identifier,
1577         &target_wwn_attr_vpd_assoc_logical_unit,
1578         &target_wwn_attr_vpd_assoc_target_port,
1579         &target_wwn_attr_vpd_assoc_scsi_target_device,
1580         NULL,
1581 };
1582
1583 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs);
1584
1585 /*  End functions for struct config_item_type tb_dev_wwn_cit */
1586
1587 /*  Start functions for struct config_item_type tb_dev_pr_cit */
1588
1589 static struct se_device *pr_to_dev(struct config_item *item)
1590 {
1591         return container_of(to_config_group(item), struct se_device,
1592                         dev_pr_group);
1593 }
1594
1595 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1596                 char *page)
1597 {
1598         struct se_node_acl *se_nacl;
1599         struct t10_pr_registration *pr_reg;
1600         char i_buf[PR_REG_ISID_ID_LEN];
1601
1602         memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1603
1604         pr_reg = dev->dev_pr_res_holder;
1605         if (!pr_reg)
1606                 return sprintf(page, "No SPC-3 Reservation holder\n");
1607
1608         se_nacl = pr_reg->pr_reg_nacl;
1609         core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1610
1611         return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1612                 se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1613                 se_nacl->initiatorname, i_buf);
1614 }
1615
1616 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1617                 char *page)
1618 {
1619         struct se_session *sess = dev->reservation_holder;
1620         struct se_node_acl *se_nacl;
1621         ssize_t len;
1622
1623         if (sess) {
1624                 se_nacl = sess->se_node_acl;
1625                 len = sprintf(page,
1626                               "SPC-2 Reservation: %s Initiator: %s\n",
1627                               se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1628                               se_nacl->initiatorname);
1629         } else {
1630                 len = sprintf(page, "No SPC-2 Reservation holder\n");
1631         }
1632         return len;
1633 }
1634
1635 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page)
1636 {
1637         struct se_device *dev = pr_to_dev(item);
1638         int ret;
1639
1640         if (!dev->dev_attrib.emulate_pr)
1641                 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1642
1643         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1644                 return sprintf(page, "Passthrough\n");
1645
1646         spin_lock(&dev->dev_reservation_lock);
1647         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1648                 ret = target_core_dev_pr_show_spc2_res(dev, page);
1649         else
1650                 ret = target_core_dev_pr_show_spc3_res(dev, page);
1651         spin_unlock(&dev->dev_reservation_lock);
1652         return ret;
1653 }
1654
1655 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item,
1656                 char *page)
1657 {
1658         struct se_device *dev = pr_to_dev(item);
1659         ssize_t len = 0;
1660
1661         spin_lock(&dev->dev_reservation_lock);
1662         if (!dev->dev_pr_res_holder) {
1663                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1664         } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1665                 len = sprintf(page, "SPC-3 Reservation: All Target"
1666                         " Ports registration\n");
1667         } else {
1668                 len = sprintf(page, "SPC-3 Reservation: Single"
1669                         " Target Port registration\n");
1670         }
1671
1672         spin_unlock(&dev->dev_reservation_lock);
1673         return len;
1674 }
1675
1676 static ssize_t target_pr_res_pr_generation_show(struct config_item *item,
1677                 char *page)
1678 {
1679         return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation);
1680 }
1681
1682
1683 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item,
1684                 char *page)
1685 {
1686         struct se_device *dev = pr_to_dev(item);
1687         struct se_node_acl *se_nacl;
1688         struct se_portal_group *se_tpg;
1689         struct t10_pr_registration *pr_reg;
1690         const struct target_core_fabric_ops *tfo;
1691         ssize_t len = 0;
1692
1693         spin_lock(&dev->dev_reservation_lock);
1694         pr_reg = dev->dev_pr_res_holder;
1695         if (!pr_reg) {
1696                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1697                 goto out_unlock;
1698         }
1699
1700         se_nacl = pr_reg->pr_reg_nacl;
1701         se_tpg = se_nacl->se_tpg;
1702         tfo = se_tpg->se_tpg_tfo;
1703
1704         len += sprintf(page+len, "SPC-3 Reservation: %s"
1705                 " Target Node Endpoint: %s\n", tfo->fabric_name,
1706                 tfo->tpg_get_wwn(se_tpg));
1707         len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1708                 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1709                 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
1710                 tfo->fabric_name, tfo->tpg_get_tag(se_tpg),
1711                 tfo->fabric_name, pr_reg->pr_aptpl_target_lun);
1712
1713 out_unlock:
1714         spin_unlock(&dev->dev_reservation_lock);
1715         return len;
1716 }
1717
1718
1719 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item,
1720                 char *page)
1721 {
1722         struct se_device *dev = pr_to_dev(item);
1723         const struct target_core_fabric_ops *tfo;
1724         struct t10_pr_registration *pr_reg;
1725         unsigned char buf[384];
1726         char i_buf[PR_REG_ISID_ID_LEN];
1727         ssize_t len = 0;
1728         int reg_count = 0;
1729
1730         len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1731
1732         spin_lock(&dev->t10_pr.registration_lock);
1733         list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1734                         pr_reg_list) {
1735
1736                 memset(buf, 0, 384);
1737                 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1738                 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1739                 core_pr_dump_initiator_port(pr_reg, i_buf,
1740                                         PR_REG_ISID_ID_LEN);
1741                 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1742                         tfo->fabric_name,
1743                         pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1744                         pr_reg->pr_res_generation);
1745
1746                 if (len + strlen(buf) >= PAGE_SIZE)
1747                         break;
1748
1749                 len += sprintf(page+len, "%s", buf);
1750                 reg_count++;
1751         }
1752         spin_unlock(&dev->t10_pr.registration_lock);
1753
1754         if (!reg_count)
1755                 len += sprintf(page+len, "None\n");
1756
1757         return len;
1758 }
1759
1760 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page)
1761 {
1762         struct se_device *dev = pr_to_dev(item);
1763         struct t10_pr_registration *pr_reg;
1764         ssize_t len = 0;
1765
1766         spin_lock(&dev->dev_reservation_lock);
1767         pr_reg = dev->dev_pr_res_holder;
1768         if (pr_reg) {
1769                 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1770                         core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1771         } else {
1772                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1773         }
1774
1775         spin_unlock(&dev->dev_reservation_lock);
1776         return len;
1777 }
1778
1779 static ssize_t target_pr_res_type_show(struct config_item *item, char *page)
1780 {
1781         struct se_device *dev = pr_to_dev(item);
1782
1783         if (!dev->dev_attrib.emulate_pr)
1784                 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1785         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1786                 return sprintf(page, "SPC_PASSTHROUGH\n");
1787         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1788                 return sprintf(page, "SPC2_RESERVATIONS\n");
1789
1790         return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1791 }
1792
1793 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item,
1794                 char *page)
1795 {
1796         struct se_device *dev = pr_to_dev(item);
1797
1798         if (!dev->dev_attrib.emulate_pr ||
1799             (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1800                 return 0;
1801
1802         return sprintf(page, "APTPL Bit Status: %s\n",
1803                 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1804 }
1805
1806 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item,
1807                 char *page)
1808 {
1809         struct se_device *dev = pr_to_dev(item);
1810
1811         if (!dev->dev_attrib.emulate_pr ||
1812             (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1813                 return 0;
1814
1815         return sprintf(page, "Ready to process PR APTPL metadata..\n");
1816 }
1817
1818 enum {
1819         Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1820         Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1821         Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1822         Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1823 };
1824
1825 static match_table_t tokens = {
1826         {Opt_initiator_fabric, "initiator_fabric=%s"},
1827         {Opt_initiator_node, "initiator_node=%s"},
1828         {Opt_initiator_sid, "initiator_sid=%s"},
1829         {Opt_sa_res_key, "sa_res_key=%s"},
1830         {Opt_res_holder, "res_holder=%d"},
1831         {Opt_res_type, "res_type=%d"},
1832         {Opt_res_scope, "res_scope=%d"},
1833         {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1834         {Opt_mapped_lun, "mapped_lun=%u"},
1835         {Opt_target_fabric, "target_fabric=%s"},
1836         {Opt_target_node, "target_node=%s"},
1837         {Opt_tpgt, "tpgt=%d"},
1838         {Opt_port_rtpi, "port_rtpi=%d"},
1839         {Opt_target_lun, "target_lun=%u"},
1840         {Opt_err, NULL}
1841 };
1842
1843 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item,
1844                 const char *page, size_t count)
1845 {
1846         struct se_device *dev = pr_to_dev(item);
1847         unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1848         unsigned char *t_fabric = NULL, *t_port = NULL;
1849         char *orig, *ptr, *opts;
1850         substring_t args[MAX_OPT_ARGS];
1851         unsigned long long tmp_ll;
1852         u64 sa_res_key = 0;
1853         u64 mapped_lun = 0, target_lun = 0;
1854         int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1855         u16 tpgt = 0;
1856         u8 type = 0;
1857
1858         if (!dev->dev_attrib.emulate_pr ||
1859             (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1860                 return count;
1861         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1862                 return count;
1863
1864         if (dev->export_count) {
1865                 pr_debug("Unable to process APTPL metadata while"
1866                         " active fabric exports exist\n");
1867                 return -EINVAL;
1868         }
1869
1870         opts = kstrdup(page, GFP_KERNEL);
1871         if (!opts)
1872                 return -ENOMEM;
1873
1874         orig = opts;
1875         while ((ptr = strsep(&opts, ",\n")) != NULL) {
1876                 if (!*ptr)
1877                         continue;
1878
1879                 token = match_token(ptr, tokens, args);
1880                 switch (token) {
1881                 case Opt_initiator_fabric:
1882                         i_fabric = match_strdup(args);
1883                         if (!i_fabric) {
1884                                 ret = -ENOMEM;
1885                                 goto out;
1886                         }
1887                         break;
1888                 case Opt_initiator_node:
1889                         i_port = match_strdup(args);
1890                         if (!i_port) {
1891                                 ret = -ENOMEM;
1892                                 goto out;
1893                         }
1894                         if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1895                                 pr_err("APTPL metadata initiator_node="
1896                                         " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1897                                         PR_APTPL_MAX_IPORT_LEN);
1898                                 ret = -EINVAL;
1899                                 break;
1900                         }
1901                         break;
1902                 case Opt_initiator_sid:
1903                         isid = match_strdup(args);
1904                         if (!isid) {
1905                                 ret = -ENOMEM;
1906                                 goto out;
1907                         }
1908                         if (strlen(isid) >= PR_REG_ISID_LEN) {
1909                                 pr_err("APTPL metadata initiator_isid"
1910                                         "= exceeds PR_REG_ISID_LEN: %d\n",
1911                                         PR_REG_ISID_LEN);
1912                                 ret = -EINVAL;
1913                                 break;
1914                         }
1915                         break;
1916                 case Opt_sa_res_key:
1917                         ret = match_u64(args,  &tmp_ll);
1918                         if (ret < 0) {
1919                                 pr_err("kstrtoull() failed for sa_res_key=\n");
1920                                 goto out;
1921                         }
1922                         sa_res_key = (u64)tmp_ll;
1923                         break;
1924                 /*
1925                  * PR APTPL Metadata for Reservation
1926                  */
1927                 case Opt_res_holder:
1928                         ret = match_int(args, &arg);
1929                         if (ret)
1930                                 goto out;
1931                         res_holder = arg;
1932                         break;
1933                 case Opt_res_type:
1934                         ret = match_int(args, &arg);
1935                         if (ret)
1936                                 goto out;
1937                         type = (u8)arg;
1938                         break;
1939                 case Opt_res_scope:
1940                         ret = match_int(args, &arg);
1941                         if (ret)
1942                                 goto out;
1943                         break;
1944                 case Opt_res_all_tg_pt:
1945                         ret = match_int(args, &arg);
1946                         if (ret)
1947                                 goto out;
1948                         all_tg_pt = (int)arg;
1949                         break;
1950                 case Opt_mapped_lun:
1951                         ret = match_u64(args, &tmp_ll);
1952                         if (ret)
1953                                 goto out;
1954                         mapped_lun = (u64)tmp_ll;
1955                         break;
1956                 /*
1957                  * PR APTPL Metadata for Target Port
1958                  */
1959                 case Opt_target_fabric:
1960                         t_fabric = match_strdup(args);
1961                         if (!t_fabric) {
1962                                 ret = -ENOMEM;
1963                                 goto out;
1964                         }
1965                         break;
1966                 case Opt_target_node:
1967                         t_port = match_strdup(args);
1968                         if (!t_port) {
1969                                 ret = -ENOMEM;
1970                                 goto out;
1971                         }
1972                         if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1973                                 pr_err("APTPL metadata target_node="
1974                                         " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1975                                         PR_APTPL_MAX_TPORT_LEN);
1976                                 ret = -EINVAL;
1977                                 break;
1978                         }
1979                         break;
1980                 case Opt_tpgt:
1981                         ret = match_int(args, &arg);
1982                         if (ret)
1983                                 goto out;
1984                         tpgt = (u16)arg;
1985                         break;
1986                 case Opt_port_rtpi:
1987                         ret = match_int(args, &arg);
1988                         if (ret)
1989                                 goto out;
1990                         break;
1991                 case Opt_target_lun:
1992                         ret = match_u64(args, &tmp_ll);
1993                         if (ret)
1994                                 goto out;
1995                         target_lun = (u64)tmp_ll;
1996                         break;
1997                 default:
1998                         break;
1999                 }
2000         }
2001
2002         if (!i_port || !t_port || !sa_res_key) {
2003                 pr_err("Illegal parameters for APTPL registration\n");
2004                 ret = -EINVAL;
2005                 goto out;
2006         }
2007
2008         if (res_holder && !(type)) {
2009                 pr_err("Illegal PR type: 0x%02x for reservation"
2010                                 " holder\n", type);
2011                 ret = -EINVAL;
2012                 goto out;
2013         }
2014
2015         ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
2016                         i_port, isid, mapped_lun, t_port, tpgt, target_lun,
2017                         res_holder, all_tg_pt, type);
2018 out:
2019         kfree(i_fabric);
2020         kfree(i_port);
2021         kfree(isid);
2022         kfree(t_fabric);
2023         kfree(t_port);
2024         kfree(orig);
2025         return (ret == 0) ? count : ret;
2026 }
2027
2028
2029 CONFIGFS_ATTR_RO(target_pr_, res_holder);
2030 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts);
2031 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation);
2032 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port);
2033 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts);
2034 CONFIGFS_ATTR_RO(target_pr_, res_pr_type);
2035 CONFIGFS_ATTR_RO(target_pr_, res_type);
2036 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active);
2037 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata);
2038
2039 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
2040         &target_pr_attr_res_holder,
2041         &target_pr_attr_res_pr_all_tgt_pts,
2042         &target_pr_attr_res_pr_generation,
2043         &target_pr_attr_res_pr_holder_tg_port,
2044         &target_pr_attr_res_pr_registered_i_pts,
2045         &target_pr_attr_res_pr_type,
2046         &target_pr_attr_res_type,
2047         &target_pr_attr_res_aptpl_active,
2048         &target_pr_attr_res_aptpl_metadata,
2049         NULL,
2050 };
2051
2052 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs);
2053
2054 /*  End functions for struct config_item_type tb_dev_pr_cit */
2055
2056 /*  Start functions for struct config_item_type tb_dev_cit */
2057
2058 static inline struct se_device *to_device(struct config_item *item)
2059 {
2060         return container_of(to_config_group(item), struct se_device, dev_group);
2061 }
2062
2063 static ssize_t target_dev_info_show(struct config_item *item, char *page)
2064 {
2065         struct se_device *dev = to_device(item);
2066         int bl = 0;
2067         ssize_t read_bytes = 0;
2068
2069         transport_dump_dev_state(dev, page, &bl);
2070         read_bytes += bl;
2071         read_bytes += dev->transport->show_configfs_dev_params(dev,
2072                         page+read_bytes);
2073         return read_bytes;
2074 }
2075
2076 static ssize_t target_dev_control_store(struct config_item *item,
2077                 const char *page, size_t count)
2078 {
2079         struct se_device *dev = to_device(item);
2080
2081         return dev->transport->set_configfs_dev_params(dev, page, count);
2082 }
2083
2084 static ssize_t target_dev_alias_show(struct config_item *item, char *page)
2085 {
2086         struct se_device *dev = to_device(item);
2087
2088         if (!(dev->dev_flags & DF_USING_ALIAS))
2089                 return 0;
2090
2091         return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
2092 }
2093
2094 static ssize_t target_dev_alias_store(struct config_item *item,
2095                 const char *page, size_t count)
2096 {
2097         struct se_device *dev = to_device(item);
2098         struct se_hba *hba = dev->se_hba;
2099         ssize_t read_bytes;
2100
2101         if (count > (SE_DEV_ALIAS_LEN-1)) {
2102                 pr_err("alias count: %d exceeds"
2103                         " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
2104                         SE_DEV_ALIAS_LEN-1);
2105                 return -EINVAL;
2106         }
2107
2108         read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
2109         if (!read_bytes)
2110                 return -EINVAL;
2111         if (dev->dev_alias[read_bytes - 1] == '\n')
2112                 dev->dev_alias[read_bytes - 1] = '\0';
2113
2114         dev->dev_flags |= DF_USING_ALIAS;
2115
2116         pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
2117                 config_item_name(&hba->hba_group.cg_item),
2118                 config_item_name(&dev->dev_group.cg_item),
2119                 dev->dev_alias);
2120
2121         return read_bytes;
2122 }
2123
2124 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page)
2125 {
2126         struct se_device *dev = to_device(item);
2127
2128         if (!(dev->dev_flags & DF_USING_UDEV_PATH))
2129                 return 0;
2130
2131         return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
2132 }
2133
2134 static ssize_t target_dev_udev_path_store(struct config_item *item,
2135                 const char *page, size_t count)
2136 {
2137         struct se_device *dev = to_device(item);
2138         struct se_hba *hba = dev->se_hba;
2139         ssize_t read_bytes;
2140
2141         if (count > (SE_UDEV_PATH_LEN-1)) {
2142                 pr_err("udev_path count: %d exceeds"
2143                         " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
2144                         SE_UDEV_PATH_LEN-1);
2145                 return -EINVAL;
2146         }
2147
2148         read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
2149                         "%s", page);
2150         if (!read_bytes)
2151                 return -EINVAL;
2152         if (dev->udev_path[read_bytes - 1] == '\n')
2153                 dev->udev_path[read_bytes - 1] = '\0';
2154
2155         dev->dev_flags |= DF_USING_UDEV_PATH;
2156
2157         pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
2158                 config_item_name(&hba->hba_group.cg_item),
2159                 config_item_name(&dev->dev_group.cg_item),
2160                 dev->udev_path);
2161
2162         return read_bytes;
2163 }
2164
2165 static ssize_t target_dev_enable_show(struct config_item *item, char *page)
2166 {
2167         struct se_device *dev = to_device(item);
2168
2169         return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev));
2170 }
2171
2172 static ssize_t target_dev_enable_store(struct config_item *item,
2173                 const char *page, size_t count)
2174 {
2175         struct se_device *dev = to_device(item);
2176         char *ptr;
2177         int ret;
2178
2179         ptr = strstr(page, "1");
2180         if (!ptr) {
2181                 pr_err("For dev_enable ops, only valid value"
2182                                 " is \"1\"\n");
2183                 return -EINVAL;
2184         }
2185
2186         ret = target_configure_device(dev);
2187         if (ret)
2188                 return ret;
2189         return count;
2190 }
2191
2192 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page)
2193 {
2194         struct se_device *dev = to_device(item);
2195         struct config_item *lu_ci;
2196         struct t10_alua_lu_gp *lu_gp;
2197         struct t10_alua_lu_gp_member *lu_gp_mem;
2198         ssize_t len = 0;
2199
2200         lu_gp_mem = dev->dev_alua_lu_gp_mem;
2201         if (!lu_gp_mem)
2202                 return 0;
2203
2204         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2205         lu_gp = lu_gp_mem->lu_gp;
2206         if (lu_gp) {
2207                 lu_ci = &lu_gp->lu_gp_group.cg_item;
2208                 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
2209                         config_item_name(lu_ci), lu_gp->lu_gp_id);
2210         }
2211         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2212
2213         return len;
2214 }
2215
2216 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item,
2217                 const char *page, size_t count)
2218 {
2219         struct se_device *dev = to_device(item);
2220         struct se_hba *hba = dev->se_hba;
2221         struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
2222         struct t10_alua_lu_gp_member *lu_gp_mem;
2223         unsigned char buf[LU_GROUP_NAME_BUF];
2224         int move = 0;
2225
2226         lu_gp_mem = dev->dev_alua_lu_gp_mem;
2227         if (!lu_gp_mem)
2228                 return count;
2229
2230         if (count > LU_GROUP_NAME_BUF) {
2231                 pr_err("ALUA LU Group Alias too large!\n");
2232                 return -EINVAL;
2233         }
2234         memset(buf, 0, LU_GROUP_NAME_BUF);
2235         memcpy(buf, page, count);
2236         /*
2237          * Any ALUA logical unit alias besides "NULL" means we will be
2238          * making a new group association.
2239          */
2240         if (strcmp(strstrip(buf), "NULL")) {
2241                 /*
2242                  * core_alua_get_lu_gp_by_name() will increment reference to
2243                  * struct t10_alua_lu_gp.  This reference is released with
2244                  * core_alua_get_lu_gp_by_name below().
2245                  */
2246                 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
2247                 if (!lu_gp_new)
2248                         return -ENODEV;
2249         }
2250
2251         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2252         lu_gp = lu_gp_mem->lu_gp;
2253         if (lu_gp) {
2254                 /*
2255                  * Clearing an existing lu_gp association, and replacing
2256                  * with NULL
2257                  */
2258                 if (!lu_gp_new) {
2259                         pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
2260                                 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
2261                                 " %hu\n",
2262                                 config_item_name(&hba->hba_group.cg_item),
2263                                 config_item_name(&dev->dev_group.cg_item),
2264                                 config_item_name(&lu_gp->lu_gp_group.cg_item),
2265                                 lu_gp->lu_gp_id);
2266
2267                         __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2268                         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2269
2270                         return count;
2271                 }
2272                 /*
2273                  * Removing existing association of lu_gp_mem with lu_gp
2274                  */
2275                 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2276                 move = 1;
2277         }
2278         /*
2279          * Associate lu_gp_mem with lu_gp_new.
2280          */
2281         __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
2282         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2283
2284         pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
2285                 " core/alua/lu_gps/%s, ID: %hu\n",
2286                 (move) ? "Moving" : "Adding",
2287                 config_item_name(&hba->hba_group.cg_item),
2288                 config_item_name(&dev->dev_group.cg_item),
2289                 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
2290                 lu_gp_new->lu_gp_id);
2291
2292         core_alua_put_lu_gp_from_name(lu_gp_new);
2293         return count;
2294 }
2295
2296 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page)
2297 {
2298         struct se_device *dev = to_device(item);
2299         struct t10_alua_lba_map *map;
2300         struct t10_alua_lba_map_member *mem;
2301         char *b = page;
2302         int bl = 0;
2303         char state;
2304
2305         spin_lock(&dev->t10_alua.lba_map_lock);
2306         if (!list_empty(&dev->t10_alua.lba_map_list))
2307             bl += sprintf(b + bl, "%u %u\n",
2308                           dev->t10_alua.lba_map_segment_size,
2309                           dev->t10_alua.lba_map_segment_multiplier);
2310         list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
2311                 bl += sprintf(b + bl, "%llu %llu",
2312                               map->lba_map_first_lba, map->lba_map_last_lba);
2313                 list_for_each_entry(mem, &map->lba_map_mem_list,
2314                                     lba_map_mem_list) {
2315                         switch (mem->lba_map_mem_alua_state) {
2316                         case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
2317                                 state = 'O';
2318                                 break;
2319                         case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
2320                                 state = 'A';
2321                                 break;
2322                         case ALUA_ACCESS_STATE_STANDBY:
2323                                 state = 'S';
2324                                 break;
2325                         case ALUA_ACCESS_STATE_UNAVAILABLE:
2326                                 state = 'U';
2327                                 break;
2328                         default:
2329                                 state = '.';
2330                                 break;
2331                         }
2332                         bl += sprintf(b + bl, " %d:%c",
2333                                       mem->lba_map_mem_alua_pg_id, state);
2334                 }
2335                 bl += sprintf(b + bl, "\n");
2336         }
2337         spin_unlock(&dev->t10_alua.lba_map_lock);
2338         return bl;
2339 }
2340
2341 static ssize_t target_dev_lba_map_store(struct config_item *item,
2342                 const char *page, size_t count)
2343 {
2344         struct se_device *dev = to_device(item);
2345         struct t10_alua_lba_map *lba_map = NULL;
2346         struct list_head lba_list;
2347         char *map_entries, *orig, *ptr;
2348         char state;
2349         int pg_num = -1, pg;
2350         int ret = 0, num = 0, pg_id, alua_state;
2351         unsigned long start_lba = -1, end_lba = -1;
2352         unsigned long segment_size = -1, segment_mult = -1;
2353
2354         orig = map_entries = kstrdup(page, GFP_KERNEL);
2355         if (!map_entries)
2356                 return -ENOMEM;
2357
2358         INIT_LIST_HEAD(&lba_list);
2359         while ((ptr = strsep(&map_entries, "\n")) != NULL) {
2360                 if (!*ptr)
2361                         continue;
2362
2363                 if (num == 0) {
2364                         if (sscanf(ptr, "%lu %lu\n",
2365                                    &segment_size, &segment_mult) != 2) {
2366                                 pr_err("Invalid line %d\n", num);
2367                                 ret = -EINVAL;
2368                                 break;
2369                         }
2370                         num++;
2371                         continue;
2372                 }
2373                 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2374                         pr_err("Invalid line %d\n", num);
2375                         ret = -EINVAL;
2376                         break;
2377                 }
2378                 ptr = strchr(ptr, ' ');
2379                 if (!ptr) {
2380                         pr_err("Invalid line %d, missing end lba\n", num);
2381                         ret = -EINVAL;
2382                         break;
2383                 }
2384                 ptr++;
2385                 ptr = strchr(ptr, ' ');
2386                 if (!ptr) {
2387                         pr_err("Invalid line %d, missing state definitions\n",
2388                                num);
2389                         ret = -EINVAL;
2390                         break;
2391                 }
2392                 ptr++;
2393                 lba_map = core_alua_allocate_lba_map(&lba_list,
2394                                                      start_lba, end_lba);
2395                 if (IS_ERR(lba_map)) {
2396                         ret = PTR_ERR(lba_map);
2397                         break;
2398                 }
2399                 pg = 0;
2400                 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2401                         switch (state) {
2402                         case 'O':
2403                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2404                                 break;
2405                         case 'A':
2406                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2407                                 break;
2408                         case 'S':
2409                                 alua_state = ALUA_ACCESS_STATE_STANDBY;
2410                                 break;
2411                         case 'U':
2412                                 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2413                                 break;
2414                         default:
2415                                 pr_err("Invalid ALUA state '%c'\n", state);
2416                                 ret = -EINVAL;
2417                                 goto out;
2418                         }
2419
2420                         ret = core_alua_allocate_lba_map_mem(lba_map,
2421                                                              pg_id, alua_state);
2422                         if (ret) {
2423                                 pr_err("Invalid target descriptor %d:%c "
2424                                        "at line %d\n",
2425                                        pg_id, state, num);
2426                                 break;
2427                         }
2428                         pg++;
2429                         ptr = strchr(ptr, ' ');
2430                         if (ptr)
2431                                 ptr++;
2432                         else
2433                                 break;
2434                 }
2435                 if (pg_num == -1)
2436                     pg_num = pg;
2437                 else if (pg != pg_num) {
2438                         pr_err("Only %d from %d port groups definitions "
2439                                "at line %d\n", pg, pg_num, num);
2440                         ret = -EINVAL;
2441                         break;
2442                 }
2443                 num++;
2444         }
2445 out:
2446         if (ret) {
2447                 core_alua_free_lba_map(&lba_list);
2448                 count = ret;
2449         } else
2450                 core_alua_set_lba_map(dev, &lba_list,
2451                                       segment_size, segment_mult);
2452         kfree(orig);
2453         return count;
2454 }
2455
2456 CONFIGFS_ATTR_RO(target_dev_, info);
2457 CONFIGFS_ATTR_WO(target_dev_, control);
2458 CONFIGFS_ATTR(target_dev_, alias);
2459 CONFIGFS_ATTR(target_dev_, udev_path);
2460 CONFIGFS_ATTR(target_dev_, enable);
2461 CONFIGFS_ATTR(target_dev_, alua_lu_gp);
2462 CONFIGFS_ATTR(target_dev_, lba_map);
2463
2464 static struct configfs_attribute *target_core_dev_attrs[] = {
2465         &target_dev_attr_info,
2466         &target_dev_attr_control,
2467         &target_dev_attr_alias,
2468         &target_dev_attr_udev_path,
2469         &target_dev_attr_enable,
2470         &target_dev_attr_alua_lu_gp,
2471         &target_dev_attr_lba_map,
2472         NULL,
2473 };
2474
2475 static void target_core_dev_release(struct config_item *item)
2476 {
2477         struct config_group *dev_cg = to_config_group(item);
2478         struct se_device *dev =
2479                 container_of(dev_cg, struct se_device, dev_group);
2480
2481         target_free_device(dev);
2482 }
2483
2484 /*
2485  * Used in target_core_fabric_configfs.c to verify valid se_device symlink
2486  * within target_fabric_port_link()
2487  */
2488 struct configfs_item_operations target_core_dev_item_ops = {
2489         .release                = target_core_dev_release,
2490 };
2491
2492 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2493
2494 /* End functions for struct config_item_type tb_dev_cit */
2495
2496 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2497
2498 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item)
2499 {
2500         return container_of(to_config_group(item), struct t10_alua_lu_gp,
2501                         lu_gp_group);
2502 }
2503
2504 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page)
2505 {
2506         struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2507
2508         if (!lu_gp->lu_gp_valid_id)
2509                 return 0;
2510         return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2511 }
2512
2513 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item,
2514                 const char *page, size_t count)
2515 {
2516         struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2517         struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2518         unsigned long lu_gp_id;
2519         int ret;
2520
2521         ret = kstrtoul(page, 0, &lu_gp_id);
2522         if (ret < 0) {
2523                 pr_err("kstrtoul() returned %d for"
2524                         " lu_gp_id\n", ret);
2525                 return ret;
2526         }
2527         if (lu_gp_id > 0x0000ffff) {
2528                 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2529                         " 0x0000ffff\n", lu_gp_id);
2530                 return -EINVAL;
2531         }
2532
2533         ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2534         if (ret < 0)
2535                 return -EINVAL;
2536
2537         pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2538                 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2539                 config_item_name(&alua_lu_gp_cg->cg_item),
2540                 lu_gp->lu_gp_id);
2541
2542         return count;
2543 }
2544
2545 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
2546 {
2547         struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2548         struct se_device *dev;
2549         struct se_hba *hba;
2550         struct t10_alua_lu_gp_member *lu_gp_mem;
2551         ssize_t len = 0, cur_len;
2552         unsigned char buf[LU_GROUP_NAME_BUF];
2553
2554         memset(buf, 0, LU_GROUP_NAME_BUF);
2555
2556         spin_lock(&lu_gp->lu_gp_lock);
2557         list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2558                 dev = lu_gp_mem->lu_gp_mem_dev;
2559                 hba = dev->se_hba;
2560
2561                 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2562                         config_item_name(&hba->hba_group.cg_item),
2563                         config_item_name(&dev->dev_group.cg_item));
2564                 cur_len++; /* Extra byte for NULL terminator */
2565
2566                 if ((cur_len + len) > PAGE_SIZE) {
2567                         pr_warn("Ran out of lu_gp_show_attr"
2568                                 "_members buffer\n");
2569                         break;
2570                 }
2571                 memcpy(page+len, buf, cur_len);
2572                 len += cur_len;
2573         }
2574         spin_unlock(&lu_gp->lu_gp_lock);
2575
2576         return len;
2577 }
2578
2579 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id);
2580 CONFIGFS_ATTR_RO(target_lu_gp_, members);
2581
2582 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2583         &target_lu_gp_attr_lu_gp_id,
2584         &target_lu_gp_attr_members,
2585         NULL,
2586 };
2587
2588 static void target_core_alua_lu_gp_release(struct config_item *item)
2589 {
2590         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2591                         struct t10_alua_lu_gp, lu_gp_group);
2592
2593         core_alua_free_lu_gp(lu_gp);
2594 }
2595
2596 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2597         .release                = target_core_alua_lu_gp_release,
2598 };
2599
2600 static const struct config_item_type target_core_alua_lu_gp_cit = {
2601         .ct_item_ops            = &target_core_alua_lu_gp_ops,
2602         .ct_attrs               = target_core_alua_lu_gp_attrs,
2603         .ct_owner               = THIS_MODULE,
2604 };
2605
2606 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2607
2608 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2609
2610 static struct config_group *target_core_alua_create_lu_gp(
2611         struct config_group *group,
2612         const char *name)
2613 {
2614         struct t10_alua_lu_gp *lu_gp;
2615         struct config_group *alua_lu_gp_cg = NULL;
2616         struct config_item *alua_lu_gp_ci = NULL;
2617
2618         lu_gp = core_alua_allocate_lu_gp(name, 0);
2619         if (IS_ERR(lu_gp))
2620                 return NULL;
2621
2622         alua_lu_gp_cg = &lu_gp->lu_gp_group;
2623         alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2624
2625         config_group_init_type_name(alua_lu_gp_cg, name,
2626                         &target_core_alua_lu_gp_cit);
2627
2628         pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2629                 " Group: core/alua/lu_gps/%s\n",
2630                 config_item_name(alua_lu_gp_ci));
2631
2632         return alua_lu_gp_cg;
2633
2634 }
2635
2636 static void target_core_alua_drop_lu_gp(
2637         struct config_group *group,
2638         struct config_item *item)
2639 {
2640         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2641                         struct t10_alua_lu_gp, lu_gp_group);
2642
2643         pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2644                 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2645                 config_item_name(item), lu_gp->lu_gp_id);
2646         /*
2647          * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2648          * -> target_core_alua_lu_gp_release()
2649          */
2650         config_item_put(item);
2651 }
2652
2653 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2654         .make_group             = &target_core_alua_create_lu_gp,
2655         .drop_item              = &target_core_alua_drop_lu_gp,
2656 };
2657
2658 static const struct config_item_type target_core_alua_lu_gps_cit = {
2659         .ct_item_ops            = NULL,
2660         .ct_group_ops           = &target_core_alua_lu_gps_group_ops,
2661         .ct_owner               = THIS_MODULE,
2662 };
2663
2664 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2665
2666 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2667
2668 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item)
2669 {
2670         return container_of(to_config_group(item), struct t10_alua_tg_pt_gp,
2671                         tg_pt_gp_group);
2672 }
2673
2674 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item,
2675                 char *page)
2676 {
2677         return sprintf(page, "%d\n",
2678                        to_tg_pt_gp(item)->tg_pt_gp_alua_access_state);
2679 }
2680
2681 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item,
2682                 const char *page, size_t count)
2683 {
2684         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2685         struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2686         unsigned long tmp;
2687         int new_state, ret;
2688
2689         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2690                 pr_err("Unable to do implicit ALUA on non valid"
2691                         " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2692                 return -EINVAL;
2693         }
2694         if (!target_dev_configured(dev)) {
2695                 pr_err("Unable to set alua_access_state while device is"
2696                        " not configured\n");
2697                 return -ENODEV;
2698         }
2699
2700         ret = kstrtoul(page, 0, &tmp);
2701         if (ret < 0) {
2702                 pr_err("Unable to extract new ALUA access state from"
2703                                 " %s\n", page);
2704                 return ret;
2705         }
2706         new_state = (int)tmp;
2707
2708         if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2709                 pr_err("Unable to process implicit configfs ALUA"
2710                         " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2711                 return -EINVAL;
2712         }
2713         if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2714             new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2715                 /* LBA DEPENDENT is only allowed with implicit ALUA */
2716                 pr_err("Unable to process implicit configfs ALUA transition"
2717                        " while explicit ALUA management is enabled\n");
2718                 return -EINVAL;
2719         }
2720
2721         ret = core_alua_do_port_transition(tg_pt_gp, dev,
2722                                         NULL, NULL, new_state, 0);
2723         return (!ret) ? count : -EINVAL;
2724 }
2725
2726 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item,
2727                 char *page)
2728 {
2729         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2730         return sprintf(page, "%s\n",
2731                 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2732 }
2733
2734 static ssize_t target_tg_pt_gp_alua_access_status_store(
2735                 struct config_item *item, const char *page, size_t count)
2736 {
2737         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2738         unsigned long tmp;
2739         int new_status, ret;
2740
2741         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2742                 pr_err("Unable to do set ALUA access status on non"
2743                         " valid tg_pt_gp ID: %hu\n",
2744                         tg_pt_gp->tg_pt_gp_valid_id);
2745                 return -EINVAL;
2746         }
2747
2748         ret = kstrtoul(page, 0, &tmp);
2749         if (ret < 0) {
2750                 pr_err("Unable to extract new ALUA access status"
2751                                 " from %s\n", page);
2752                 return ret;
2753         }
2754         new_status = (int)tmp;
2755
2756         if ((new_status != ALUA_STATUS_NONE) &&
2757             (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2758             (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2759                 pr_err("Illegal ALUA access status: 0x%02x\n",
2760                                 new_status);
2761                 return -EINVAL;
2762         }
2763
2764         tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2765         return count;
2766 }
2767
2768 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item,
2769                 char *page)
2770 {
2771         return core_alua_show_access_type(to_tg_pt_gp(item), page);
2772 }
2773
2774 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item,
2775                 const char *page, size_t count)
2776 {
2777         return core_alua_store_access_type(to_tg_pt_gp(item), page, count);
2778 }
2779
2780 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit)                          \
2781 static ssize_t target_tg_pt_gp_alua_support_##_name##_show(             \
2782                 struct config_item *item, char *p)                      \
2783 {                                                                       \
2784         struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item);                \
2785         return sprintf(p, "%d\n",                                       \
2786                 !!(t->tg_pt_gp_alua_supported_states & _bit));          \
2787 }                                                                       \
2788                                                                         \
2789 static ssize_t target_tg_pt_gp_alua_support_##_name##_store(            \
2790                 struct config_item *item, const char *p, size_t c)      \
2791 {                                                                       \
2792         struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item);                \
2793         unsigned long tmp;                                              \
2794         int ret;                                                        \
2795                                                                         \
2796         if (!t->tg_pt_gp_valid_id) {                                    \
2797                 pr_err("Unable to do set " #_name " ALUA state on non"  \
2798                        " valid tg_pt_gp ID: %hu\n",                     \
2799                        t->tg_pt_gp_valid_id);                           \
2800                 return -EINVAL;                                         \
2801         }                                                               \
2802                                                                         \
2803         ret = kstrtoul(p, 0, &tmp);                                     \
2804         if (ret < 0) {                                                  \
2805                 pr_err("Invalid value '%s', must be '0' or '1'\n", p);  \
2806                 return -EINVAL;                                         \
2807         }                                                               \
2808         if (tmp > 1) {                                                  \
2809                 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2810                 return -EINVAL;                                         \
2811         }                                                               \
2812         if (tmp)                                                        \
2813                 t->tg_pt_gp_alua_supported_states |= _bit;              \
2814         else                                                            \
2815                 t->tg_pt_gp_alua_supported_states &= ~_bit;             \
2816                                                                         \
2817         return c;                                                       \
2818 }
2819
2820 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP);
2821 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP);
2822 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP);
2823 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP);
2824 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP);
2825 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP);
2826 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP);
2827
2828 static ssize_t target_tg_pt_gp_alua_write_metadata_show(
2829                 struct config_item *item, char *page)
2830 {
2831         return sprintf(page, "%d\n",
2832                 to_tg_pt_gp(item)->tg_pt_gp_write_metadata);
2833 }
2834
2835 static ssize_t target_tg_pt_gp_alua_write_metadata_store(
2836                 struct config_item *item, const char *page, size_t count)
2837 {
2838         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2839         unsigned long tmp;
2840         int ret;
2841
2842         ret = kstrtoul(page, 0, &tmp);
2843         if (ret < 0) {
2844                 pr_err("Unable to extract alua_write_metadata\n");
2845                 return ret;
2846         }
2847
2848         if ((tmp != 0) && (tmp != 1)) {
2849                 pr_err("Illegal value for alua_write_metadata:"
2850                         " %lu\n", tmp);
2851                 return -EINVAL;
2852         }
2853         tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2854
2855         return count;
2856 }
2857
2858 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item,
2859                 char *page)
2860 {
2861         return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page);
2862 }
2863
2864 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item,
2865                 const char *page, size_t count)
2866 {
2867         return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page,
2868                         count);
2869 }
2870
2871 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item,
2872                 char *page)
2873 {
2874         return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page);
2875 }
2876
2877 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item,
2878                 const char *page, size_t count)
2879 {
2880         return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page,
2881                         count);
2882 }
2883
2884 static ssize_t target_tg_pt_gp_implicit_trans_secs_show(
2885                 struct config_item *item, char *page)
2886 {
2887         return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page);
2888 }
2889
2890 static ssize_t target_tg_pt_gp_implicit_trans_secs_store(
2891                 struct config_item *item, const char *page, size_t count)
2892 {
2893         return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page,
2894                         count);
2895 }
2896
2897 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item,
2898                 char *page)
2899 {
2900         return core_alua_show_preferred_bit(to_tg_pt_gp(item), page);
2901 }
2902
2903 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item,
2904                 const char *page, size_t count)
2905 {
2906         return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count);
2907 }
2908
2909 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item,
2910                 char *page)
2911 {
2912         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2913
2914         if (!tg_pt_gp->tg_pt_gp_valid_id)
2915                 return 0;
2916         return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2917 }
2918
2919 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item,
2920                 const char *page, size_t count)
2921 {
2922         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2923         struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2924         unsigned long tg_pt_gp_id;
2925         int ret;
2926
2927         ret = kstrtoul(page, 0, &tg_pt_gp_id);
2928         if (ret < 0) {
2929                 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n",
2930                        page);
2931                 return ret;
2932         }
2933         if (tg_pt_gp_id > 0x0000ffff) {
2934                 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n",
2935                        tg_pt_gp_id);
2936                 return -EINVAL;
2937         }
2938
2939         ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2940         if (ret < 0)
2941                 return -EINVAL;
2942
2943         pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2944                 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2945                 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2946                 tg_pt_gp->tg_pt_gp_id);
2947
2948         return count;
2949 }
2950
2951 static ssize_t target_tg_pt_gp_members_show(struct config_item *item,
2952                 char *page)
2953 {
2954         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2955         struct se_lun *lun;
2956         ssize_t len = 0, cur_len;
2957         unsigned char buf[TG_PT_GROUP_NAME_BUF];
2958
2959         memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2960
2961         spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2962         list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
2963                         lun_tg_pt_gp_link) {
2964                 struct se_portal_group *tpg = lun->lun_tpg;
2965
2966                 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2967                         "/%s\n", tpg->se_tpg_tfo->fabric_name,
2968                         tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2969                         tpg->se_tpg_tfo->tpg_get_tag(tpg),
2970                         config_item_name(&lun->lun_group.cg_item));
2971                 cur_len++; /* Extra byte for NULL terminator */
2972
2973                 if ((cur_len + len) > PAGE_SIZE) {
2974                         pr_warn("Ran out of lu_gp_show_attr"
2975                                 "_members buffer\n");
2976                         break;
2977                 }
2978                 memcpy(page+len, buf, cur_len);
2979                 len += cur_len;
2980         }
2981         spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2982
2983         return len;
2984 }
2985
2986 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state);
2987 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status);
2988 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type);
2989 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning);
2990 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline);
2991 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent);
2992 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable);
2993 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby);
2994 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized);
2995 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized);
2996 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata);
2997 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs);
2998 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs);
2999 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs);
3000 CONFIGFS_ATTR(target_tg_pt_gp_, preferred);
3001 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id);
3002 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members);
3003
3004 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
3005         &target_tg_pt_gp_attr_alua_access_state,
3006         &target_tg_pt_gp_attr_alua_access_status,
3007         &target_tg_pt_gp_attr_alua_access_type,
3008         &target_tg_pt_gp_attr_alua_support_transitioning,
3009         &target_tg_pt_gp_attr_alua_support_offline,
3010         &target_tg_pt_gp_attr_alua_support_lba_dependent,
3011         &target_tg_pt_gp_attr_alua_support_unavailable,
3012         &target_tg_pt_gp_attr_alua_support_standby,
3013         &target_tg_pt_gp_attr_alua_support_active_nonoptimized,
3014         &target_tg_pt_gp_attr_alua_support_active_optimized,
3015         &target_tg_pt_gp_attr_alua_write_metadata,
3016         &target_tg_pt_gp_attr_nonop_delay_msecs,
3017         &target_tg_pt_gp_attr_trans_delay_msecs,
3018         &target_tg_pt_gp_attr_implicit_trans_secs,
3019         &target_tg_pt_gp_attr_preferred,
3020         &target_tg_pt_gp_attr_tg_pt_gp_id,
3021         &target_tg_pt_gp_attr_members,
3022         NULL,
3023 };
3024
3025 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
3026 {
3027         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3028                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3029
3030         core_alua_free_tg_pt_gp(tg_pt_gp);
3031 }
3032
3033 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
3034         .release                = target_core_alua_tg_pt_gp_release,
3035 };
3036
3037 static const struct config_item_type target_core_alua_tg_pt_gp_cit = {
3038         .ct_item_ops            = &target_core_alua_tg_pt_gp_ops,
3039         .ct_attrs               = target_core_alua_tg_pt_gp_attrs,
3040         .ct_owner               = THIS_MODULE,
3041 };
3042
3043 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
3044
3045 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3046
3047 static struct config_group *target_core_alua_create_tg_pt_gp(
3048         struct config_group *group,
3049         const char *name)
3050 {
3051         struct t10_alua *alua = container_of(group, struct t10_alua,
3052                                         alua_tg_pt_gps_group);
3053         struct t10_alua_tg_pt_gp *tg_pt_gp;
3054         struct config_group *alua_tg_pt_gp_cg = NULL;
3055         struct config_item *alua_tg_pt_gp_ci = NULL;
3056
3057         tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
3058         if (!tg_pt_gp)
3059                 return NULL;
3060
3061         alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
3062         alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
3063
3064         config_group_init_type_name(alua_tg_pt_gp_cg, name,
3065                         &target_core_alua_tg_pt_gp_cit);
3066
3067         pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
3068                 " Group: alua/tg_pt_gps/%s\n",
3069                 config_item_name(alua_tg_pt_gp_ci));
3070
3071         return alua_tg_pt_gp_cg;
3072 }
3073
3074 static void target_core_alua_drop_tg_pt_gp(
3075         struct config_group *group,
3076         struct config_item *item)
3077 {
3078         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3079                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3080
3081         pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
3082                 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
3083                 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
3084         /*
3085          * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
3086          * -> target_core_alua_tg_pt_gp_release().
3087          */
3088         config_item_put(item);
3089 }
3090
3091 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
3092         .make_group             = &target_core_alua_create_tg_pt_gp,
3093         .drop_item              = &target_core_alua_drop_tg_pt_gp,
3094 };
3095
3096 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
3097
3098 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3099
3100 /* Start functions for struct config_item_type target_core_alua_cit */
3101
3102 /*
3103  * target_core_alua_cit is a ConfigFS group that lives under
3104  * /sys/kernel/config/target/core/alua.  There are default groups
3105  * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
3106  * target_core_alua_cit in target_core_init_configfs() below.
3107  */
3108 static const struct config_item_type target_core_alua_cit = {
3109         .ct_item_ops            = NULL,
3110         .ct_attrs               = NULL,
3111         .ct_owner               = THIS_MODULE,
3112 };
3113
3114 /* End functions for struct config_item_type target_core_alua_cit */
3115
3116 /* Start functions for struct config_item_type tb_dev_stat_cit */
3117
3118 static struct config_group *target_core_stat_mkdir(
3119         struct config_group *group,
3120         const char *name)
3121 {
3122         return ERR_PTR(-ENOSYS);
3123 }
3124
3125 static void target_core_stat_rmdir(
3126         struct config_group *group,
3127         struct config_item *item)
3128 {
3129         return;
3130 }
3131
3132 static struct configfs_group_operations target_core_stat_group_ops = {
3133         .make_group             = &target_core_stat_mkdir,
3134         .drop_item              = &target_core_stat_rmdir,
3135 };
3136
3137 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
3138
3139 /* End functions for struct config_item_type tb_dev_stat_cit */
3140
3141 /* Start functions for struct config_item_type target_core_hba_cit */
3142
3143 static struct config_group *target_core_make_subdev(
3144         struct config_group *group,
3145         const char *name)
3146 {
3147         struct t10_alua_tg_pt_gp *tg_pt_gp;
3148         struct config_item *hba_ci = &group->cg_item;
3149         struct se_hba *hba = item_to_hba(hba_ci);
3150         struct target_backend *tb = hba->backend;
3151         struct se_device *dev;
3152         int errno = -ENOMEM, ret;
3153
3154         ret = mutex_lock_interruptible(&hba->hba_access_mutex);
3155         if (ret)
3156                 return ERR_PTR(ret);
3157
3158         dev = target_alloc_device(hba, name);
3159         if (!dev)
3160                 goto out_unlock;
3161
3162         config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit);
3163
3164         config_group_init_type_name(&dev->dev_action_group, "action",
3165                         &tb->tb_dev_action_cit);
3166         configfs_add_default_group(&dev->dev_action_group, &dev->dev_group);
3167
3168         config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
3169                         &tb->tb_dev_attrib_cit);
3170         configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group);
3171
3172         config_group_init_type_name(&dev->dev_pr_group, "pr",
3173                         &tb->tb_dev_pr_cit);
3174         configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group);
3175
3176         config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
3177                         &tb->tb_dev_wwn_cit);
3178         configfs_add_default_group(&dev->t10_wwn.t10_wwn_group,
3179                         &dev->dev_group);
3180
3181         config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
3182                         "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
3183         configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group,
3184                         &dev->dev_group);
3185
3186         config_group_init_type_name(&dev->dev_stat_grps.stat_group,
3187                         "statistics", &tb->tb_dev_stat_cit);
3188         configfs_add_default_group(&dev->dev_stat_grps.stat_group,
3189                         &dev->dev_group);
3190
3191         /*
3192          * Add core/$HBA/$DEV/alua/default_tg_pt_gp
3193          */
3194         tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
3195         if (!tg_pt_gp)
3196                 goto out_free_device;
3197         dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
3198
3199         config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
3200                         "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
3201         configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group,
3202                         &dev->t10_alua.alua_tg_pt_gps_group);
3203
3204         /*
3205          * Add core/$HBA/$DEV/statistics/ default groups
3206          */
3207         target_stat_setup_dev_default_groups(dev);
3208
3209         mutex_unlock(&hba->hba_access_mutex);
3210         return &dev->dev_group;
3211
3212 out_free_device:
3213         target_free_device(dev);
3214 out_unlock:
3215         mutex_unlock(&hba->hba_access_mutex);
3216         return ERR_PTR(errno);
3217 }
3218
3219 static void target_core_drop_subdev(
3220         struct config_group *group,
3221         struct config_item *item)
3222 {
3223         struct config_group *dev_cg = to_config_group(item);
3224         struct se_device *dev =
3225                 container_of(dev_cg, struct se_device, dev_group);
3226         struct se_hba *hba;
3227
3228         hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
3229
3230         mutex_lock(&hba->hba_access_mutex);
3231
3232         configfs_remove_default_groups(&dev->dev_stat_grps.stat_group);
3233         configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group);
3234
3235         /*
3236          * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
3237          * directly from target_core_alua_tg_pt_gp_release().
3238          */
3239         dev->t10_alua.default_tg_pt_gp = NULL;
3240
3241         configfs_remove_default_groups(dev_cg);
3242
3243         /*
3244          * se_dev is released from target_core_dev_item_ops->release()
3245          */
3246         config_item_put(item);
3247         mutex_unlock(&hba->hba_access_mutex);
3248 }
3249
3250 static struct configfs_group_operations target_core_hba_group_ops = {
3251         .make_group             = target_core_make_subdev,
3252         .drop_item              = target_core_drop_subdev,
3253 };
3254
3255
3256 static inline struct se_hba *to_hba(struct config_item *item)
3257 {
3258         return container_of(to_config_group(item), struct se_hba, hba_group);
3259 }
3260
3261 static ssize_t target_hba_info_show(struct config_item *item, char *page)
3262 {
3263         struct se_hba *hba = to_hba(item);
3264
3265         return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
3266                         hba->hba_id, hba->backend->ops->name,
3267                         TARGET_CORE_VERSION);
3268 }
3269
3270 static ssize_t target_hba_mode_show(struct config_item *item, char *page)
3271 {
3272         struct se_hba *hba = to_hba(item);
3273         int hba_mode = 0;
3274
3275         if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
3276                 hba_mode = 1;
3277
3278         return sprintf(page, "%d\n", hba_mode);
3279 }
3280
3281 static ssize_t target_hba_mode_store(struct config_item *item,
3282                 const char *page, size_t count)
3283 {
3284         struct se_hba *hba = to_hba(item);
3285         unsigned long mode_flag;
3286         int ret;
3287
3288         if (hba->backend->ops->pmode_enable_hba == NULL)
3289                 return -EINVAL;
3290
3291         ret = kstrtoul(page, 0, &mode_flag);
3292         if (ret < 0) {
3293                 pr_err("Unable to extract hba mode flag: %d\n", ret);
3294                 return ret;
3295         }
3296
3297         if (hba->dev_count) {
3298                 pr_err("Unable to set hba_mode with active devices\n");
3299                 return -EINVAL;
3300         }
3301
3302         ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
3303         if (ret < 0)
3304                 return -EINVAL;
3305         if (ret > 0)
3306                 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3307         else if (ret == 0)
3308                 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3309
3310         return count;
3311 }
3312
3313 CONFIGFS_ATTR_RO(target_, hba_info);
3314 CONFIGFS_ATTR(target_, hba_mode);
3315
3316 static void target_core_hba_release(struct config_item *item)
3317 {
3318         struct se_hba *hba = container_of(to_config_group(item),
3319                                 struct se_hba, hba_group);
3320         core_delete_hba(hba);
3321 }
3322
3323 static struct configfs_attribute *target_core_hba_attrs[] = {
3324         &target_attr_hba_info,
3325         &target_attr_hba_mode,
3326         NULL,
3327 };
3328
3329 static struct configfs_item_operations target_core_hba_item_ops = {
3330         .release                = target_core_hba_release,
3331 };
3332
3333 static const struct config_item_type target_core_hba_cit = {
3334         .ct_item_ops            = &target_core_hba_item_ops,
3335         .ct_group_ops           = &target_core_hba_group_ops,
3336         .ct_attrs               = target_core_hba_attrs,
3337         .ct_owner               = THIS_MODULE,
3338 };
3339
3340 static struct config_group *target_core_call_addhbatotarget(
3341         struct config_group *group,
3342         const char *name)
3343 {
3344         char *se_plugin_str, *str, *str2;
3345         struct se_hba *hba;
3346         char buf[TARGET_CORE_NAME_MAX_LEN];
3347         unsigned long plugin_dep_id = 0;
3348         int ret;
3349
3350         memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3351         if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3352                 pr_err("Passed *name strlen(): %d exceeds"
3353                         " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3354                         TARGET_CORE_NAME_MAX_LEN);
3355                 return ERR_PTR(-ENAMETOOLONG);
3356         }
3357         snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3358
3359         str = strstr(buf, "_");
3360         if (!str) {
3361                 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3362                 return ERR_PTR(-EINVAL);
3363         }
3364         se_plugin_str = buf;
3365         /*
3366          * Special case for subsystem plugins that have "_" in their names.
3367          * Namely rd_direct and rd_mcp..
3368          */
3369         str2 = strstr(str+1, "_");
3370         if (str2) {
3371                 *str2 = '\0'; /* Terminate for *se_plugin_str */
3372                 str2++; /* Skip to start of plugin dependent ID */
3373                 str = str2;
3374         } else {
3375                 *str = '\0'; /* Terminate for *se_plugin_str */
3376                 str++; /* Skip to start of plugin dependent ID */
3377         }
3378
3379         ret = kstrtoul(str, 0, &plugin_dep_id);
3380         if (ret < 0) {
3381                 pr_err("kstrtoul() returned %d for"
3382                                 " plugin_dep_id\n", ret);
3383                 return ERR_PTR(ret);
3384         }
3385         /*
3386          * Load up TCM subsystem plugins if they have not already been loaded.
3387          */
3388         transport_subsystem_check_init();
3389
3390         hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3391         if (IS_ERR(hba))
3392                 return ERR_CAST(hba);
3393
3394         config_group_init_type_name(&hba->hba_group, name,
3395                         &target_core_hba_cit);
3396
3397         return &hba->hba_group;
3398 }
3399
3400 static void target_core_call_delhbafromtarget(
3401         struct config_group *group,
3402         struct config_item *item)
3403 {
3404         /*
3405          * core_delete_hba() is called from target_core_hba_item_ops->release()
3406          * -> target_core_hba_release()
3407          */
3408         config_item_put(item);
3409 }
3410
3411 static struct configfs_group_operations target_core_group_ops = {
3412         .make_group     = target_core_call_addhbatotarget,
3413         .drop_item      = target_core_call_delhbafromtarget,
3414 };
3415
3416 static const struct config_item_type target_core_cit = {
3417         .ct_item_ops    = NULL,
3418         .ct_group_ops   = &target_core_group_ops,
3419         .ct_attrs       = NULL,
3420         .ct_owner       = THIS_MODULE,
3421 };
3422
3423 /* Stop functions for struct config_item_type target_core_hba_cit */
3424
3425 void target_setup_backend_cits(struct target_backend *tb)
3426 {
3427         target_core_setup_dev_cit(tb);
3428         target_core_setup_dev_action_cit(tb);
3429         target_core_setup_dev_attrib_cit(tb);
3430         target_core_setup_dev_pr_cit(tb);
3431         target_core_setup_dev_wwn_cit(tb);
3432         target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3433         target_core_setup_dev_stat_cit(tb);
3434 }
3435
3436 static void target_init_dbroot(void)
3437 {
3438         struct file *fp;
3439
3440         snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED);
3441         fp = filp_open(db_root_stage, O_RDONLY, 0);
3442         if (IS_ERR(fp)) {
3443                 pr_err("db_root: cannot open: %s\n", db_root_stage);
3444                 return;
3445         }
3446         if (!S_ISDIR(file_inode(fp)->i_mode)) {
3447                 filp_close(fp, NULL);
3448                 pr_err("db_root: not a valid directory: %s\n", db_root_stage);
3449                 return;
3450         }
3451         filp_close(fp, NULL);
3452
3453         strncpy(db_root, db_root_stage, DB_ROOT_LEN);
3454         pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
3455 }
3456
3457 static int __init target_core_init_configfs(void)
3458 {
3459         struct configfs_subsystem *subsys = &target_core_fabrics;
3460         struct t10_alua_lu_gp *lu_gp;
3461         int ret;
3462
3463         pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3464                 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3465                 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3466
3467         config_group_init(&subsys->su_group);
3468         mutex_init(&subsys->su_mutex);
3469
3470         ret = init_se_kmem_caches();
3471         if (ret < 0)
3472                 return ret;
3473         /*
3474          * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3475          * and ALUA Logical Unit Group and Target Port Group infrastructure.
3476          */
3477         config_group_init_type_name(&target_core_hbagroup, "core",
3478                         &target_core_cit);
3479         configfs_add_default_group(&target_core_hbagroup, &subsys->su_group);
3480
3481         /*
3482          * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3483          */
3484         config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit);
3485         configfs_add_default_group(&alua_group, &target_core_hbagroup);
3486
3487         /*
3488          * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3489          * groups under /sys/kernel/config/target/core/alua/
3490          */
3491         config_group_init_type_name(&alua_lu_gps_group, "lu_gps",
3492                         &target_core_alua_lu_gps_cit);
3493         configfs_add_default_group(&alua_lu_gps_group, &alua_group);
3494
3495         /*
3496          * Add core/alua/lu_gps/default_lu_gp
3497          */
3498         lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3499         if (IS_ERR(lu_gp)) {
3500                 ret = -ENOMEM;
3501                 goto out_global;
3502         }
3503
3504         config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3505                                 &target_core_alua_lu_gp_cit);
3506         configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group);
3507
3508         default_lu_gp = lu_gp;
3509
3510         /*
3511          * Register the target_core_mod subsystem with configfs.
3512          */
3513         ret = configfs_register_subsystem(subsys);
3514         if (ret < 0) {
3515                 pr_err("Error %d while registering subsystem %s\n",
3516                         ret, subsys->su_group.cg_item.ci_namebuf);
3517                 goto out_global;
3518         }
3519         pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3520                 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
3521                 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3522         /*
3523          * Register built-in RAMDISK subsystem logic for virtual LUN 0
3524          */
3525         ret = rd_module_init();
3526         if (ret < 0)
3527                 goto out;
3528
3529         ret = core_dev_setup_virtual_lun0();
3530         if (ret < 0)
3531                 goto out;
3532
3533         ret = target_xcopy_setup_pt();
3534         if (ret < 0)
3535                 goto out;
3536
3537         target_init_dbroot();
3538
3539         return 0;
3540
3541 out:
3542         configfs_unregister_subsystem(subsys);
3543         core_dev_release_virtual_lun0();
3544         rd_module_exit();
3545 out_global:
3546         if (default_lu_gp) {
3547                 core_alua_free_lu_gp(default_lu_gp);
3548                 default_lu_gp = NULL;
3549         }
3550         release_se_kmem_caches();
3551         return ret;
3552 }
3553
3554 static void __exit target_core_exit_configfs(void)
3555 {
3556         configfs_remove_default_groups(&alua_lu_gps_group);
3557         configfs_remove_default_groups(&alua_group);
3558         configfs_remove_default_groups(&target_core_hbagroup);
3559
3560         /*
3561          * We expect subsys->su_group.default_groups to be released
3562          * by configfs subsystem provider logic..
3563          */
3564         configfs_unregister_subsystem(&target_core_fabrics);
3565
3566         core_alua_free_lu_gp(default_lu_gp);
3567         default_lu_gp = NULL;
3568
3569         pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3570                         " Infrastructure\n");
3571
3572         core_dev_release_virtual_lun0();
3573         rd_module_exit();
3574         target_xcopy_release_pt();
3575         release_se_kmem_caches();
3576 }
3577
3578 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3579 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3580 MODULE_LICENSE("GPL");
3581
3582 module_init(target_core_init_configfs);
3583 module_exit(target_core_exit_configfs);