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 != TARGET_UA_INTLCK_CTRL_CLEAR
 688          && val != TARGET_UA_INTLCK_CTRL_NO_CLEAR
 689          && val != TARGET_UA_INTLCK_CTRL_ESTABLISH_UA) {
 690                 pr_err("Illegal value %d\n", val);
 691                 return -EINVAL;
 692         }
 693
 694         if (da->da_dev->export_count) {
 695                 pr_err("dev[%p]: Unable to change SE Device"
 696                         " UA_INTRLCK_CTRL while export_count is %d\n",
 697                         da->da_dev, da->da_dev->export_count);
 698                 return -EINVAL;
 699         }
 700         da->emulate_ua_intlck_ctrl = val;
 701         pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
 702                 da->da_dev, val);
 703         return count;
 704 }
 705
 706 static ssize_t emulate_tas_store(struct config_item *item,
 707                 const char *page, size_t count)
 708 {
 709         struct se_dev_attrib *da = to_attrib(item);
 710         bool flag;
 711         int ret;
 712
 713         ret = strtobool(page, &flag);
 714         if (ret < 0)
 715                 return ret;
 716
 717         if (da->da_dev->export_count) {
 718                 pr_err("dev[%p]: Unable to change SE Device TAS while"
 719                         " export_count is %d\n",
 720                         da->da_dev, da->da_dev->export_count);
 721                 return -EINVAL;
 722         }
 723         da->emulate_tas = flag;
 724         pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
 725                 da->da_dev, flag ? "Enabled" : "Disabled");
 726
 727         return count;
 728 }
 729
 730 static ssize_t emulate_tpu_store(struct config_item *item,
 731                 const char *page, size_t count)
 732 {
 733         struct se_dev_attrib *da = to_attrib(item);
 734         bool flag;
 735         int ret;
 736
 737         ret = strtobool(page, &flag);
 738         if (ret < 0)
 739                 return ret;
 740
 741         /*
 742          * We expect this value to be non-zero when generic Block Layer
 743          * Discard supported is detected iblock_create_virtdevice().
 744          */
 745         if (flag && !da->max_unmap_block_desc_count) {
 746                 pr_err("Generic Block Discard not supported\n");
 747                 return -ENOSYS;
 748         }
 749
 750         da->emulate_tpu = flag;
 751         pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
 752                 da->da_dev, flag);
 753         return count;
 754 }
 755
 756 static ssize_t emulate_tpws_store(struct config_item *item,
 757                 const char *page, size_t count)
 758 {
 759         struct se_dev_attrib *da = to_attrib(item);
 760         bool flag;
 761         int ret;
 762
 763         ret = strtobool(page, &flag);
 764         if (ret < 0)
 765                 return ret;
 766
 767         /*
 768          * We expect this value to be non-zero when generic Block Layer
 769          * Discard supported is detected iblock_create_virtdevice().
 770          */
 771         if (flag && !da->max_unmap_block_desc_count) {
 772                 pr_err("Generic Block Discard not supported\n");
 773                 return -ENOSYS;
 774         }
 775
 776         da->emulate_tpws = flag;
 777         pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
 778                                 da->da_dev, flag);
 779         return count;
 780 }
 781
 782 static ssize_t pi_prot_type_store(struct config_item *item,
 783                 const char *page, size_t count)
 784 {
 785         struct se_dev_attrib *da = to_attrib(item);
 786         int old_prot = da->pi_prot_type, ret;
 787         struct se_device *dev = da->da_dev;
 788         u32 flag;
 789
 790         ret = kstrtou32(page, 0, &flag);
 791         if (ret < 0)
 792                 return ret;
 793
 794         if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
 795                 pr_err("Illegal value %d for pi_prot_type\n", flag);
 796                 return -EINVAL;
 797         }
 798         if (flag == 2) {
 799                 pr_err("DIF TYPE2 protection currently not supported\n");
 800                 return -ENOSYS;
 801         }
 802         if (da->hw_pi_prot_type) {
 803                 pr_warn("DIF protection enabled on underlying hardware,"
 804                         " ignoring\n");
 805                 return count;
 806         }
 807         if (!dev->transport->init_prot || !dev->transport->free_prot) {
 808                 /* 0 is only allowed value for non-supporting backends */
 809                 if (flag == 0)
 810                         return count;
 811
 812                 pr_err("DIF protection not supported by backend: %s\n",
 813                        dev->transport->name);
 814                 return -ENOSYS;
 815         }
 816         if (!target_dev_configured(dev)) {
 817                 pr_err("DIF protection requires device to be configured\n");
 818                 return -ENODEV;
 819         }
 820         if (dev->export_count) {
 821                 pr_err("dev[%p]: Unable to change SE Device PROT type while"
 822                        " export_count is %d\n", dev, dev->export_count);
 823                 return -EINVAL;
 824         }
 825
 826         da->pi_prot_type = flag;
 827
 828         if (flag && !old_prot) {
 829                 ret = dev->transport->init_prot(dev);
 830                 if (ret) {
 831                         da->pi_prot_type = old_prot;
 832                         da->pi_prot_verify = (bool) da->pi_prot_type;
 833                         return ret;
 834                 }
 835
 836         } else if (!flag && old_prot) {
 837                 dev->transport->free_prot(dev);
 838         }
 839
 840         da->pi_prot_verify = (bool) da->pi_prot_type;
 841         pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
 842         return count;
 843 }
 844
 845 /* always zero, but attr needs to remain RW to avoid userspace breakage */
 846 static ssize_t pi_prot_format_show(struct config_item *item, char *page)
 847 {
 848         return snprintf(page, PAGE_SIZE, "0\n");
 849 }
 850
 851 static ssize_t pi_prot_format_store(struct config_item *item,
 852                 const char *page, size_t count)
 853 {
 854         struct se_dev_attrib *da = to_attrib(item);
 855         struct se_device *dev = da->da_dev;
 856         bool flag;
 857         int ret;
 858
 859         ret = strtobool(page, &flag);
 860         if (ret < 0)
 861                 return ret;
 862
 863         if (!flag)
 864                 return count;
 865
 866         if (!dev->transport->format_prot) {
 867                 pr_err("DIF protection format not supported by backend %s\n",
 868                        dev->transport->name);
 869                 return -ENOSYS;
 870         }
 871         if (!target_dev_configured(dev)) {
 872                 pr_err("DIF protection format requires device to be configured\n");
 873                 return -ENODEV;
 874         }
 875         if (dev->export_count) {
 876                 pr_err("dev[%p]: Unable to format SE Device PROT type while"
 877                        " export_count is %d\n", dev, dev->export_count);
 878                 return -EINVAL;
 879         }
 880
 881         ret = dev->transport->format_prot(dev);
 882         if (ret)
 883                 return ret;
 884
 885         pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
 886         return count;
 887 }
 888
 889 static ssize_t pi_prot_verify_store(struct config_item *item,
 890                 const char *page, size_t count)
 891 {
 892         struct se_dev_attrib *da = to_attrib(item);
 893         bool flag;
 894         int ret;
 895
 896         ret = strtobool(page, &flag);
 897         if (ret < 0)
 898                 return ret;
 899
 900         if (!flag) {
 901                 da->pi_prot_verify = flag;
 902                 return count;
 903         }
 904         if (da->hw_pi_prot_type) {
 905                 pr_warn("DIF protection enabled on underlying hardware,"
 906                         " ignoring\n");
 907                 return count;
 908         }
 909         if (!da->pi_prot_type) {
 910                 pr_warn("DIF protection not supported by backend, ignoring\n");
 911                 return count;
 912         }
 913         da->pi_prot_verify = flag;
 914
 915         return count;
 916 }
 917
 918 static ssize_t force_pr_aptpl_store(struct config_item *item,
 919                 const char *page, size_t count)
 920 {
 921         struct se_dev_attrib *da = to_attrib(item);
 922         bool flag;
 923         int ret;
 924
 925         ret = strtobool(page, &flag);
 926         if (ret < 0)
 927                 return ret;
 928         if (da->da_dev->export_count) {
 929                 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
 930                        " export_count is %d\n",
 931                        da->da_dev, da->da_dev->export_count);
 932                 return -EINVAL;
 933         }
 934
 935         da->force_pr_aptpl = flag;
 936         pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag);
 937         return count;
 938 }
 939
 940 static ssize_t emulate_rest_reord_store(struct config_item *item,
 941                 const char *page, size_t count)
 942 {
 943         struct se_dev_attrib *da = to_attrib(item);
 944         bool flag;
 945         int ret;
 946
 947         ret = strtobool(page, &flag);
 948         if (ret < 0)
 949                 return ret;
 950
 951         if (flag != 0) {
 952                 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted"
 953                         " reordering not implemented\n", da->da_dev);
 954                 return -ENOSYS;
 955         }
 956         da->emulate_rest_reord = flag;
 957         pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
 958                 da->da_dev, flag);
 959         return count;
 960 }
 961
 962 static ssize_t unmap_zeroes_data_store(struct config_item *item,
 963                 const char *page, size_t count)
 964 {
 965         struct se_dev_attrib *da = to_attrib(item);
 966         bool flag;
 967         int ret;
 968
 969         ret = strtobool(page, &flag);
 970         if (ret < 0)
 971                 return ret;
 972
 973         if (da->da_dev->export_count) {
 974                 pr_err("dev[%p]: Unable to change SE Device"
 975                        " unmap_zeroes_data while export_count is %d\n",
 976                        da->da_dev, da->da_dev->export_count);
 977                 return -EINVAL;
 978         }
 979         /*
 980          * We expect this value to be non-zero when generic Block Layer
 981          * Discard supported is detected iblock_configure_device().
 982          */
 983         if (flag && !da->max_unmap_block_desc_count) {
 984                 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set"
 985                        " because max_unmap_block_desc_count is zero\n",
 986                        da->da_dev);
 987                 return -ENOSYS;
 988         }
 989         da->unmap_zeroes_data = flag;
 990         pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n",
 991                  da->da_dev, flag);
 992         return count;
 993 }
 994
 995 /*
 996  * Note, this can only be called on unexported SE Device Object.
 997  */
 998 static ssize_t queue_depth_store(struct config_item *item,
 999                 const char *page, size_t count)
1000 {
1001         struct se_dev_attrib *da = to_attrib(item);
1002         struct se_device *dev = da->da_dev;
1003         u32 val;
1004         int ret;
1005
1006         ret = kstrtou32(page, 0, &val);
1007         if (ret < 0)
1008                 return ret;
1009
1010         if (dev->export_count) {
1011                 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1012                         " export_count is %d\n",
1013                         dev, dev->export_count);
1014                 return -EINVAL;
1015         }
1016         if (!val) {
1017                 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
1018                 return -EINVAL;
1019         }
1020
1021         if (val > dev->dev_attrib.queue_depth) {
1022                 if (val > dev->dev_attrib.hw_queue_depth) {
1023                         pr_err("dev[%p]: Passed queue_depth:"
1024                                 " %u exceeds TCM/SE_Device MAX"
1025                                 " TCQ: %u\n", dev, val,
1026                                 dev->dev_attrib.hw_queue_depth);
1027                         return -EINVAL;
1028                 }
1029         }
1030         da->queue_depth = dev->queue_depth = val;
1031         pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val);
1032         return count;
1033 }
1034
1035 static ssize_t optimal_sectors_store(struct config_item *item,
1036                 const char *page, size_t count)
1037 {
1038         struct se_dev_attrib *da = to_attrib(item);
1039         u32 val;
1040         int ret;
1041
1042         ret = kstrtou32(page, 0, &val);
1043         if (ret < 0)
1044                 return ret;
1045
1046         if (da->da_dev->export_count) {
1047                 pr_err("dev[%p]: Unable to change SE Device"
1048                         " optimal_sectors while export_count is %d\n",
1049                         da->da_dev, da->da_dev->export_count);
1050                 return -EINVAL;
1051         }
1052         if (val > da->hw_max_sectors) {
1053                 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1054                         " greater than hw_max_sectors: %u\n",
1055                         da->da_dev, val, da->hw_max_sectors);
1056                 return -EINVAL;
1057         }
1058
1059         da->optimal_sectors = val;
1060         pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1061                         da->da_dev, val);
1062         return count;
1063 }
1064
1065 static ssize_t block_size_store(struct config_item *item,
1066                 const char *page, size_t count)
1067 {
1068         struct se_dev_attrib *da = to_attrib(item);
1069         u32 val;
1070         int ret;
1071
1072         ret = kstrtou32(page, 0, &val);
1073         if (ret < 0)
1074                 return ret;
1075
1076         if (da->da_dev->export_count) {
1077                 pr_err("dev[%p]: Unable to change SE Device block_size"
1078                         " while export_count is %d\n",
1079                         da->da_dev, da->da_dev->export_count);
1080                 return -EINVAL;
1081         }
1082
1083         if (val != 512 && val != 1024 && val != 2048 && val != 4096) {
1084                 pr_err("dev[%p]: Illegal value for block_device: %u"
1085                         " for SE device, must be 512, 1024, 2048 or 4096\n",
1086                         da->da_dev, val);
1087                 return -EINVAL;
1088         }
1089
1090         da->block_size = val;
1091         if (da->max_bytes_per_io)
1092                 da->hw_max_sectors = da->max_bytes_per_io / val;
1093
1094         pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1095                         da->da_dev, val);
1096         return count;
1097 }
1098
1099 static ssize_t alua_support_show(struct config_item *item, char *page)
1100 {
1101         struct se_dev_attrib *da = to_attrib(item);
1102         u8 flags = da->da_dev->transport_flags;
1103
1104         return snprintf(page, PAGE_SIZE, "%d\n",
1105                         flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1);
1106 }
1107
1108 static ssize_t alua_support_store(struct config_item *item,
1109                 const char *page, size_t count)
1110 {
1111         struct se_dev_attrib *da = to_attrib(item);
1112         struct se_device *dev = da->da_dev;
1113         bool flag;
1114         int ret;
1115
1116         if (!(dev->transport->transport_flags_changeable &
1117               TRANSPORT_FLAG_PASSTHROUGH_ALUA)) {
1118                 pr_err("dev[%p]: Unable to change SE Device alua_support:"
1119                         " alua_support has fixed value\n", dev);
1120                 return -EINVAL;
1121         }
1122
1123         ret = strtobool(page, &flag);
1124         if (ret < 0)
1125                 return ret;
1126
1127         if (flag)
1128                 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_ALUA;
1129         else
1130                 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_ALUA;
1131         return count;
1132 }
1133
1134 static ssize_t pgr_support_show(struct config_item *item, char *page)
1135 {
1136         struct se_dev_attrib *da = to_attrib(item);
1137         u8 flags = da->da_dev->transport_flags;
1138
1139         return snprintf(page, PAGE_SIZE, "%d\n",
1140                         flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1);
1141 }
1142
1143 static ssize_t pgr_support_store(struct config_item *item,
1144                 const char *page, size_t count)
1145 {
1146         struct se_dev_attrib *da = to_attrib(item);
1147         struct se_device *dev = da->da_dev;
1148         bool flag;
1149         int ret;
1150
1151         if (!(dev->transport->transport_flags_changeable &
1152               TRANSPORT_FLAG_PASSTHROUGH_PGR)) {
1153                 pr_err("dev[%p]: Unable to change SE Device pgr_support:"
1154                         " pgr_support has fixed value\n", dev);
1155                 return -EINVAL;
1156         }
1157
1158         ret = strtobool(page, &flag);
1159         if (ret < 0)
1160                 return ret;
1161
1162         if (flag)
1163                 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_PGR;
1164         else
1165                 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_PGR;
1166         return count;
1167 }
1168
1169 CONFIGFS_ATTR(, emulate_model_alias);
1170 CONFIGFS_ATTR(, emulate_dpo);
1171 CONFIGFS_ATTR(, emulate_fua_write);
1172 CONFIGFS_ATTR(, emulate_fua_read);
1173 CONFIGFS_ATTR(, emulate_write_cache);
1174 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl);
1175 CONFIGFS_ATTR(, emulate_tas);
1176 CONFIGFS_ATTR(, emulate_tpu);
1177 CONFIGFS_ATTR(, emulate_tpws);
1178 CONFIGFS_ATTR(, emulate_caw);
1179 CONFIGFS_ATTR(, emulate_3pc);
1180 CONFIGFS_ATTR(, emulate_pr);
1181 CONFIGFS_ATTR(, pi_prot_type);
1182 CONFIGFS_ATTR_RO(, hw_pi_prot_type);
1183 CONFIGFS_ATTR(, pi_prot_format);
1184 CONFIGFS_ATTR(, pi_prot_verify);
1185 CONFIGFS_ATTR(, enforce_pr_isids);
1186 CONFIGFS_ATTR(, is_nonrot);
1187 CONFIGFS_ATTR(, emulate_rest_reord);
1188 CONFIGFS_ATTR(, force_pr_aptpl);
1189 CONFIGFS_ATTR_RO(, hw_block_size);
1190 CONFIGFS_ATTR(, block_size);
1191 CONFIGFS_ATTR_RO(, hw_max_sectors);
1192 CONFIGFS_ATTR(, optimal_sectors);
1193 CONFIGFS_ATTR_RO(, hw_queue_depth);
1194 CONFIGFS_ATTR(, queue_depth);
1195 CONFIGFS_ATTR(, max_unmap_lba_count);
1196 CONFIGFS_ATTR(, max_unmap_block_desc_count);
1197 CONFIGFS_ATTR(, unmap_granularity);
1198 CONFIGFS_ATTR(, unmap_granularity_alignment);
1199 CONFIGFS_ATTR(, unmap_zeroes_data);
1200 CONFIGFS_ATTR(, max_write_same_len);
1201 CONFIGFS_ATTR(, alua_support);
1202 CONFIGFS_ATTR(, pgr_support);
1203
1204 /*
1205  * dev_attrib attributes for devices using the target core SBC/SPC
1206  * interpreter.  Any backend using spc_parse_cdb should be using
1207  * these.
1208  */
1209 struct configfs_attribute *sbc_attrib_attrs[] = {
1210         &attr_emulate_model_alias,
1211         &attr_emulate_dpo,
1212         &attr_emulate_fua_write,
1213         &attr_emulate_fua_read,
1214         &attr_emulate_write_cache,
1215         &attr_emulate_ua_intlck_ctrl,
1216         &attr_emulate_tas,
1217         &attr_emulate_tpu,
1218         &attr_emulate_tpws,
1219         &attr_emulate_caw,
1220         &attr_emulate_3pc,
1221         &attr_emulate_pr,
1222         &attr_pi_prot_type,
1223         &attr_hw_pi_prot_type,
1224         &attr_pi_prot_format,
1225         &attr_pi_prot_verify,
1226         &attr_enforce_pr_isids,
1227         &attr_is_nonrot,
1228         &attr_emulate_rest_reord,
1229         &attr_force_pr_aptpl,
1230         &attr_hw_block_size,
1231         &attr_block_size,
1232         &attr_hw_max_sectors,
1233         &attr_optimal_sectors,
1234         &attr_hw_queue_depth,
1235         &attr_queue_depth,
1236         &attr_max_unmap_lba_count,
1237         &attr_max_unmap_block_desc_count,
1238         &attr_unmap_granularity,
1239         &attr_unmap_granularity_alignment,
1240         &attr_unmap_zeroes_data,
1241         &attr_max_write_same_len,
1242         &attr_alua_support,
1243         &attr_pgr_support,
1244         NULL,
1245 };
1246 EXPORT_SYMBOL(sbc_attrib_attrs);
1247
1248 /*
1249  * Minimal dev_attrib attributes for devices passing through CDBs.
1250  * In this case we only provide a few read-only attributes for
1251  * backwards compatibility.
1252  */
1253 struct configfs_attribute *passthrough_attrib_attrs[] = {
1254         &attr_hw_pi_prot_type,
1255         &attr_hw_block_size,
1256         &attr_hw_max_sectors,
1257         &attr_hw_queue_depth,
1258         &attr_emulate_pr,
1259         &attr_alua_support,
1260         &attr_pgr_support,
1261         NULL,
1262 };
1263 EXPORT_SYMBOL(passthrough_attrib_attrs);
1264
1265 /*
1266  * pr related dev_attrib attributes for devices passing through CDBs,
1267  * but allowing in core pr emulation.
1268  */
1269 struct configfs_attribute *passthrough_pr_attrib_attrs[] = {
1270         &attr_enforce_pr_isids,
1271         &attr_force_pr_aptpl,
1272         NULL,
1273 };
1274 EXPORT_SYMBOL(passthrough_pr_attrib_attrs);
1275
1276 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL);
1277 TB_CIT_SETUP_DRV(dev_action, NULL, NULL);
1278
1279 /* End functions for struct config_item_type tb_dev_attrib_cit */
1280
1281 /*  Start functions for struct config_item_type tb_dev_wwn_cit */
1282
1283 static struct t10_wwn *to_t10_wwn(struct config_item *item)
1284 {
1285         return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group);
1286 }
1287
1288 static ssize_t target_check_inquiry_data(char *buf)
1289 {
1290         size_t len;
1291         int i;
1292
1293         len = strlen(buf);
1294
1295         /*
1296          * SPC 4.3.1:
1297          * ASCII data fields shall contain only ASCII printable characters
1298          * (i.e., code values 20h to 7Eh) and may be terminated with one or
1299          * more ASCII null (00h) characters.
1300          */
1301         for (i = 0; i < len; i++) {
1302                 if (buf[i] < 0x20 || buf[i] > 0x7E) {
1303                         pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n");
1304                         return -EINVAL;
1305                 }
1306         }
1307
1308         return len;
1309 }
1310
1311 /*
1312  * STANDARD and VPD page 0x83 T10 Vendor Identification
1313  */
1314 static ssize_t target_wwn_vendor_id_show(struct config_item *item,
1315                 char *page)
1316 {
1317         return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]);
1318 }
1319
1320 static ssize_t target_wwn_vendor_id_store(struct config_item *item,
1321                 const char *page, size_t count)
1322 {
1323         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1324         struct se_device *dev = t10_wwn->t10_dev;
1325         /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1326         unsigned char buf[INQUIRY_VENDOR_LEN + 2];
1327         char *stripped = NULL;
1328         size_t len;
1329         ssize_t ret;
1330
1331         len = strlcpy(buf, page, sizeof(buf));
1332         if (len < sizeof(buf)) {
1333                 /* Strip any newline added from userspace. */
1334                 stripped = strstrip(buf);
1335                 len = strlen(stripped);
1336         }
1337         if (len > INQUIRY_VENDOR_LEN) {
1338                 pr_err("Emulated T10 Vendor Identification exceeds"
1339                         " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN)
1340                         "\n");
1341                 return -EOVERFLOW;
1342         }
1343
1344         ret = target_check_inquiry_data(stripped);
1345
1346         if (ret < 0)
1347                 return ret;
1348
1349         /*
1350          * Check to see if any active exports exist.  If they do exist, fail
1351          * here as changing this information on the fly (underneath the
1352          * initiator side OS dependent multipath code) could cause negative
1353          * effects.
1354          */
1355         if (dev->export_count) {
1356                 pr_err("Unable to set T10 Vendor Identification while"
1357                         " active %d exports exist\n", dev->export_count);
1358                 return -EINVAL;
1359         }
1360
1361         BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1);
1362         strlcpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor));
1363
1364         pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:"
1365                  " %s\n", dev->t10_wwn.vendor);
1366
1367         return count;
1368 }
1369
1370 static ssize_t target_wwn_product_id_show(struct config_item *item,
1371                 char *page)
1372 {
1373         return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]);
1374 }
1375
1376 static ssize_t target_wwn_product_id_store(struct config_item *item,
1377                 const char *page, size_t count)
1378 {
1379         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1380         struct se_device *dev = t10_wwn->t10_dev;
1381         /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1382         unsigned char buf[INQUIRY_MODEL_LEN + 2];
1383         char *stripped = NULL;
1384         size_t len;
1385         ssize_t ret;
1386
1387         len = strlcpy(buf, page, sizeof(buf));
1388         if (len < sizeof(buf)) {
1389                 /* Strip any newline added from userspace. */
1390                 stripped = strstrip(buf);
1391                 len = strlen(stripped);
1392         }
1393         if (len > INQUIRY_MODEL_LEN) {
1394                 pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: "
1395                          __stringify(INQUIRY_MODEL_LEN)
1396                         "\n");
1397                 return -EOVERFLOW;
1398         }
1399
1400         ret = target_check_inquiry_data(stripped);
1401
1402         if (ret < 0)
1403                 return ret;
1404
1405         /*
1406          * Check to see if any active exports exist.  If they do exist, fail
1407          * here as changing this information on the fly (underneath the
1408          * initiator side OS dependent multipath code) could cause negative
1409          * effects.
1410          */
1411         if (dev->export_count) {
1412                 pr_err("Unable to set T10 Model while active %d exports exist\n",
1413                         dev->export_count);
1414                 return -EINVAL;
1415         }
1416
1417         BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
1418         strlcpy(dev->t10_wwn.model, stripped, sizeof(dev->t10_wwn.model));
1419
1420         pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n",
1421                  dev->t10_wwn.model);
1422
1423         return count;
1424 }
1425
1426 static ssize_t target_wwn_revision_show(struct config_item *item,
1427                 char *page)
1428 {
1429         return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]);
1430 }
1431
1432 static ssize_t target_wwn_revision_store(struct config_item *item,
1433                 const char *page, size_t count)
1434 {
1435         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1436         struct se_device *dev = t10_wwn->t10_dev;
1437         /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1438         unsigned char buf[INQUIRY_REVISION_LEN + 2];
1439         char *stripped = NULL;
1440         size_t len;
1441         ssize_t ret;
1442
1443         len = strlcpy(buf, page, sizeof(buf));
1444         if (len < sizeof(buf)) {
1445                 /* Strip any newline added from userspace. */
1446                 stripped = strstrip(buf);
1447                 len = strlen(stripped);
1448         }
1449         if (len > INQUIRY_REVISION_LEN) {
1450                 pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: "
1451                          __stringify(INQUIRY_REVISION_LEN)
1452                         "\n");
1453                 return -EOVERFLOW;
1454         }
1455
1456         ret = target_check_inquiry_data(stripped);
1457
1458         if (ret < 0)
1459                 return ret;
1460
1461         /*
1462          * Check to see if any active exports exist.  If they do exist, fail
1463          * here as changing this information on the fly (underneath the
1464          * initiator side OS dependent multipath code) could cause negative
1465          * effects.
1466          */
1467         if (dev->export_count) {
1468                 pr_err("Unable to set T10 Revision while active %d exports exist\n",
1469                         dev->export_count);
1470                 return -EINVAL;
1471         }
1472
1473         BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1);
1474         strlcpy(dev->t10_wwn.revision, stripped, sizeof(dev->t10_wwn.revision));
1475
1476         pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n",
1477                  dev->t10_wwn.revision);
1478
1479         return count;
1480 }
1481
1482 /*
1483  * VPD page 0x80 Unit serial
1484  */
1485 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item,
1486                 char *page)
1487 {
1488         return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1489                 &to_t10_wwn(item)->unit_serial[0]);
1490 }
1491
1492 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item,
1493                 const char *page, size_t count)
1494 {
1495         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1496         struct se_device *dev = t10_wwn->t10_dev;
1497         unsigned char buf[INQUIRY_VPD_SERIAL_LEN] = { };
1498
1499         /*
1500          * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1501          * from the struct scsi_device level firmware, do not allow
1502          * VPD Unit Serial to be emulated.
1503          *
1504          * Note this struct scsi_device could also be emulating VPD
1505          * information from its drivers/scsi LLD.  But for now we assume
1506          * it is doing 'the right thing' wrt a world wide unique
1507          * VPD Unit Serial Number that OS dependent multipath can depend on.
1508          */
1509         if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
1510                 pr_err("Underlying SCSI device firmware provided VPD"
1511                         " Unit Serial, ignoring request\n");
1512                 return -EOPNOTSUPP;
1513         }
1514
1515         if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
1516                 pr_err("Emulated VPD Unit Serial exceeds"
1517                 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1518                 return -EOVERFLOW;
1519         }
1520         /*
1521          * Check to see if any active $FABRIC_MOD exports exist.  If they
1522          * do exist, fail here as changing this information on the fly
1523          * (underneath the initiator side OS dependent multipath code)
1524          * could cause negative effects.
1525          */
1526         if (dev->export_count) {
1527                 pr_err("Unable to set VPD Unit Serial while"
1528                         " active %d $FABRIC_MOD exports exist\n",
1529                         dev->export_count);
1530                 return -EINVAL;
1531         }
1532
1533         /*
1534          * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1535          *
1536          * Also, strip any newline added from the userspace
1537          * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1538          */
1539         snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
1540         snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
1541                         "%s", strstrip(buf));
1542         dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
1543
1544         pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1545                         " %s\n", dev->t10_wwn.unit_serial);
1546
1547         return count;
1548 }
1549
1550 /*
1551  * VPD page 0x83 Protocol Identifier
1552  */
1553 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item,
1554                 char *page)
1555 {
1556         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1557         struct t10_vpd *vpd;
1558         unsigned char buf[VPD_TMP_BUF_SIZE] = { };
1559         ssize_t len = 0;
1560
1561         spin_lock(&t10_wwn->t10_vpd_lock);
1562         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
1563                 if (!vpd->protocol_identifier_set)
1564                         continue;
1565
1566                 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1567
1568                 if (len + strlen(buf) >= PAGE_SIZE)
1569                         break;
1570
1571                 len += sprintf(page+len, "%s", buf);
1572         }
1573         spin_unlock(&t10_wwn->t10_vpd_lock);
1574
1575         return len;
1576 }
1577
1578 /*
1579  * Generic wrapper for dumping VPD identifiers by association.
1580  */
1581 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc)                           \
1582 static ssize_t target_wwn_##_name##_show(struct config_item *item,      \
1583                 char *page)                                             \
1584 {                                                                       \
1585         struct t10_wwn *t10_wwn = to_t10_wwn(item);                     \
1586         struct t10_vpd *vpd;                                            \
1587         unsigned char buf[VPD_TMP_BUF_SIZE];                            \
1588         ssize_t len = 0;                                                \
1589                                                                         \
1590         spin_lock(&t10_wwn->t10_vpd_lock);                              \
1591         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {    \
1592                 if (vpd->association != _assoc)                         \
1593                         continue;                                       \
1594                                                                         \
1595                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
1596                 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE);   \
1597                 if (len + strlen(buf) >= PAGE_SIZE)                     \
1598                         break;                                          \
1599                 len += sprintf(page+len, "%s", buf);                    \
1600                                                                         \
1601                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
1602                 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1603                 if (len + strlen(buf) >= PAGE_SIZE)                     \
1604                         break;                                          \
1605                 len += sprintf(page+len, "%s", buf);                    \
1606                                                                         \
1607                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
1608                 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1609                 if (len + strlen(buf) >= PAGE_SIZE)                     \
1610                         break;                                          \
1611                 len += sprintf(page+len, "%s", buf);                    \
1612         }                                                               \
1613         spin_unlock(&t10_wwn->t10_vpd_lock);                            \
1614                                                                         \
1615         return len;                                                     \
1616 }
1617
1618 /* VPD page 0x83 Association: Logical Unit */
1619 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1620 /* VPD page 0x83 Association: Target Port */
1621 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1622 /* VPD page 0x83 Association: SCSI Target Device */
1623 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1624
1625 CONFIGFS_ATTR(target_wwn_, vendor_id);
1626 CONFIGFS_ATTR(target_wwn_, product_id);
1627 CONFIGFS_ATTR(target_wwn_, revision);
1628 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial);
1629 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier);
1630 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit);
1631 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port);
1632 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device);
1633
1634 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1635         &target_wwn_attr_vendor_id,
1636         &target_wwn_attr_product_id,
1637         &target_wwn_attr_revision,
1638         &target_wwn_attr_vpd_unit_serial,
1639         &target_wwn_attr_vpd_protocol_identifier,
1640         &target_wwn_attr_vpd_assoc_logical_unit,
1641         &target_wwn_attr_vpd_assoc_target_port,
1642         &target_wwn_attr_vpd_assoc_scsi_target_device,
1643         NULL,
1644 };
1645
1646 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs);
1647
1648 /*  End functions for struct config_item_type tb_dev_wwn_cit */
1649
1650 /*  Start functions for struct config_item_type tb_dev_pr_cit */
1651
1652 static struct se_device *pr_to_dev(struct config_item *item)
1653 {
1654         return container_of(to_config_group(item), struct se_device,
1655                         dev_pr_group);
1656 }
1657
1658 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1659                 char *page)
1660 {
1661         struct se_node_acl *se_nacl;
1662         struct t10_pr_registration *pr_reg;
1663         char i_buf[PR_REG_ISID_ID_LEN] = { };
1664
1665         pr_reg = dev->dev_pr_res_holder;
1666         if (!pr_reg)
1667                 return sprintf(page, "No SPC-3 Reservation holder\n");
1668
1669         se_nacl = pr_reg->pr_reg_nacl;
1670         core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1671
1672         return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1673                 se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1674                 se_nacl->initiatorname, i_buf);
1675 }
1676
1677 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1678                 char *page)
1679 {
1680         struct se_session *sess = dev->reservation_holder;
1681         struct se_node_acl *se_nacl;
1682         ssize_t len;
1683
1684         if (sess) {
1685                 se_nacl = sess->se_node_acl;
1686                 len = sprintf(page,
1687                               "SPC-2 Reservation: %s Initiator: %s\n",
1688                               se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1689                               se_nacl->initiatorname);
1690         } else {
1691                 len = sprintf(page, "No SPC-2 Reservation holder\n");
1692         }
1693         return len;
1694 }
1695
1696 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page)
1697 {
1698         struct se_device *dev = pr_to_dev(item);
1699         int ret;
1700
1701         if (!dev->dev_attrib.emulate_pr)
1702                 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1703
1704         if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1705                 return sprintf(page, "Passthrough\n");
1706
1707         spin_lock(&dev->dev_reservation_lock);
1708         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1709                 ret = target_core_dev_pr_show_spc2_res(dev, page);
1710         else
1711                 ret = target_core_dev_pr_show_spc3_res(dev, page);
1712         spin_unlock(&dev->dev_reservation_lock);
1713         return ret;
1714 }
1715
1716 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item,
1717                 char *page)
1718 {
1719         struct se_device *dev = pr_to_dev(item);
1720         ssize_t len = 0;
1721
1722         spin_lock(&dev->dev_reservation_lock);
1723         if (!dev->dev_pr_res_holder) {
1724                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1725         } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1726                 len = sprintf(page, "SPC-3 Reservation: All Target"
1727                         " Ports registration\n");
1728         } else {
1729                 len = sprintf(page, "SPC-3 Reservation: Single"
1730                         " Target Port registration\n");
1731         }
1732
1733         spin_unlock(&dev->dev_reservation_lock);
1734         return len;
1735 }
1736
1737 static ssize_t target_pr_res_pr_generation_show(struct config_item *item,
1738                 char *page)
1739 {
1740         return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation);
1741 }
1742
1743
1744 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item,
1745                 char *page)
1746 {
1747         struct se_device *dev = pr_to_dev(item);
1748         struct se_node_acl *se_nacl;
1749         struct se_portal_group *se_tpg;
1750         struct t10_pr_registration *pr_reg;
1751         const struct target_core_fabric_ops *tfo;
1752         ssize_t len = 0;
1753
1754         spin_lock(&dev->dev_reservation_lock);
1755         pr_reg = dev->dev_pr_res_holder;
1756         if (!pr_reg) {
1757                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1758                 goto out_unlock;
1759         }
1760
1761         se_nacl = pr_reg->pr_reg_nacl;
1762         se_tpg = se_nacl->se_tpg;
1763         tfo = se_tpg->se_tpg_tfo;
1764
1765         len += sprintf(page+len, "SPC-3 Reservation: %s"
1766                 " Target Node Endpoint: %s\n", tfo->fabric_name,
1767                 tfo->tpg_get_wwn(se_tpg));
1768         len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1769                 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1770                 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
1771                 tfo->fabric_name, tfo->tpg_get_tag(se_tpg),
1772                 tfo->fabric_name, pr_reg->pr_aptpl_target_lun);
1773
1774 out_unlock:
1775         spin_unlock(&dev->dev_reservation_lock);
1776         return len;
1777 }
1778
1779
1780 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item,
1781                 char *page)
1782 {
1783         struct se_device *dev = pr_to_dev(item);
1784         const struct target_core_fabric_ops *tfo;
1785         struct t10_pr_registration *pr_reg;
1786         unsigned char buf[384];
1787         char i_buf[PR_REG_ISID_ID_LEN];
1788         ssize_t len = 0;
1789         int reg_count = 0;
1790
1791         len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1792
1793         spin_lock(&dev->t10_pr.registration_lock);
1794         list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1795                         pr_reg_list) {
1796
1797                 memset(buf, 0, 384);
1798                 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1799                 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1800                 core_pr_dump_initiator_port(pr_reg, i_buf,
1801                                         PR_REG_ISID_ID_LEN);
1802                 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1803                         tfo->fabric_name,
1804                         pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1805                         pr_reg->pr_res_generation);
1806
1807                 if (len + strlen(buf) >= PAGE_SIZE)
1808                         break;
1809
1810                 len += sprintf(page+len, "%s", buf);
1811                 reg_count++;
1812         }
1813         spin_unlock(&dev->t10_pr.registration_lock);
1814
1815         if (!reg_count)
1816                 len += sprintf(page+len, "None\n");
1817
1818         return len;
1819 }
1820
1821 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page)
1822 {
1823         struct se_device *dev = pr_to_dev(item);
1824         struct t10_pr_registration *pr_reg;
1825         ssize_t len = 0;
1826
1827         spin_lock(&dev->dev_reservation_lock);
1828         pr_reg = dev->dev_pr_res_holder;
1829         if (pr_reg) {
1830                 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1831                         core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1832         } else {
1833                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1834         }
1835
1836         spin_unlock(&dev->dev_reservation_lock);
1837         return len;
1838 }
1839
1840 static ssize_t target_pr_res_type_show(struct config_item *item, char *page)
1841 {
1842         struct se_device *dev = pr_to_dev(item);
1843
1844         if (!dev->dev_attrib.emulate_pr)
1845                 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1846         if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1847                 return sprintf(page, "SPC_PASSTHROUGH\n");
1848         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1849                 return sprintf(page, "SPC2_RESERVATIONS\n");
1850
1851         return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1852 }
1853
1854 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item,
1855                 char *page)
1856 {
1857         struct se_device *dev = pr_to_dev(item);
1858
1859         if (!dev->dev_attrib.emulate_pr ||
1860             (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1861                 return 0;
1862
1863         return sprintf(page, "APTPL Bit Status: %s\n",
1864                 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1865 }
1866
1867 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item,
1868                 char *page)
1869 {
1870         struct se_device *dev = pr_to_dev(item);
1871
1872         if (!dev->dev_attrib.emulate_pr ||
1873             (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1874                 return 0;
1875
1876         return sprintf(page, "Ready to process PR APTPL metadata..\n");
1877 }
1878
1879 enum {
1880         Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1881         Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1882         Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1883         Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1884 };
1885
1886 static match_table_t tokens = {
1887         {Opt_initiator_fabric, "initiator_fabric=%s"},
1888         {Opt_initiator_node, "initiator_node=%s"},
1889         {Opt_initiator_sid, "initiator_sid=%s"},
1890         {Opt_sa_res_key, "sa_res_key=%s"},
1891         {Opt_res_holder, "res_holder=%d"},
1892         {Opt_res_type, "res_type=%d"},
1893         {Opt_res_scope, "res_scope=%d"},
1894         {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1895         {Opt_mapped_lun, "mapped_lun=%u"},
1896         {Opt_target_fabric, "target_fabric=%s"},
1897         {Opt_target_node, "target_node=%s"},
1898         {Opt_tpgt, "tpgt=%d"},
1899         {Opt_port_rtpi, "port_rtpi=%d"},
1900         {Opt_target_lun, "target_lun=%u"},
1901         {Opt_err, NULL}
1902 };
1903
1904 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item,
1905                 const char *page, size_t count)
1906 {
1907         struct se_device *dev = pr_to_dev(item);
1908         unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1909         unsigned char *t_fabric = NULL, *t_port = NULL;
1910         char *orig, *ptr, *opts;
1911         substring_t args[MAX_OPT_ARGS];
1912         unsigned long long tmp_ll;
1913         u64 sa_res_key = 0;
1914         u64 mapped_lun = 0, target_lun = 0;
1915         int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1916         u16 tpgt = 0;
1917         u8 type = 0;
1918
1919         if (!dev->dev_attrib.emulate_pr ||
1920             (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1921                 return count;
1922         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1923                 return count;
1924
1925         if (dev->export_count) {
1926                 pr_debug("Unable to process APTPL metadata while"
1927                         " active fabric exports exist\n");
1928                 return -EINVAL;
1929         }
1930
1931         opts = kstrdup(page, GFP_KERNEL);
1932         if (!opts)
1933                 return -ENOMEM;
1934
1935         orig = opts;
1936         while ((ptr = strsep(&opts, ",\n")) != NULL) {
1937                 if (!*ptr)
1938                         continue;
1939
1940                 token = match_token(ptr, tokens, args);
1941                 switch (token) {
1942                 case Opt_initiator_fabric:
1943                         i_fabric = match_strdup(args);
1944                         if (!i_fabric) {
1945                                 ret = -ENOMEM;
1946                                 goto out;
1947                         }
1948                         break;
1949                 case Opt_initiator_node:
1950                         i_port = match_strdup(args);
1951                         if (!i_port) {
1952                                 ret = -ENOMEM;
1953                                 goto out;
1954                         }
1955                         if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1956                                 pr_err("APTPL metadata initiator_node="
1957                                         " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1958                                         PR_APTPL_MAX_IPORT_LEN);
1959                                 ret = -EINVAL;
1960                                 break;
1961                         }
1962                         break;
1963                 case Opt_initiator_sid:
1964                         isid = match_strdup(args);
1965                         if (!isid) {
1966                                 ret = -ENOMEM;
1967                                 goto out;
1968                         }
1969                         if (strlen(isid) >= PR_REG_ISID_LEN) {
1970                                 pr_err("APTPL metadata initiator_isid"
1971                                         "= exceeds PR_REG_ISID_LEN: %d\n",
1972                                         PR_REG_ISID_LEN);
1973                                 ret = -EINVAL;
1974                                 break;
1975                         }
1976                         break;
1977                 case Opt_sa_res_key:
1978                         ret = match_u64(args,  &tmp_ll);
1979                         if (ret < 0) {
1980                                 pr_err("kstrtoull() failed for sa_res_key=\n");
1981                                 goto out;
1982                         }
1983                         sa_res_key = (u64)tmp_ll;
1984                         break;
1985                 /*
1986                  * PR APTPL Metadata for Reservation
1987                  */
1988                 case Opt_res_holder:
1989                         ret = match_int(args, &arg);
1990                         if (ret)
1991                                 goto out;
1992                         res_holder = arg;
1993                         break;
1994                 case Opt_res_type:
1995                         ret = match_int(args, &arg);
1996                         if (ret)
1997                                 goto out;
1998                         type = (u8)arg;
1999                         break;
2000                 case Opt_res_scope:
2001                         ret = match_int(args, &arg);
2002                         if (ret)
2003                                 goto out;
2004                         break;
2005                 case Opt_res_all_tg_pt:
2006                         ret = match_int(args, &arg);
2007                         if (ret)
2008                                 goto out;
2009                         all_tg_pt = (int)arg;
2010                         break;
2011                 case Opt_mapped_lun:
2012                         ret = match_u64(args, &tmp_ll);
2013                         if (ret)
2014                                 goto out;
2015                         mapped_lun = (u64)tmp_ll;
2016                         break;
2017                 /*
2018                  * PR APTPL Metadata for Target Port
2019                  */
2020                 case Opt_target_fabric:
2021                         t_fabric = match_strdup(args);
2022                         if (!t_fabric) {
2023                                 ret = -ENOMEM;
2024                                 goto out;
2025                         }
2026                         break;
2027                 case Opt_target_node:
2028                         t_port = match_strdup(args);
2029                         if (!t_port) {
2030                                 ret = -ENOMEM;
2031                                 goto out;
2032                         }
2033                         if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
2034                                 pr_err("APTPL metadata target_node="
2035                                         " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
2036                                         PR_APTPL_MAX_TPORT_LEN);
2037                                 ret = -EINVAL;
2038                                 break;
2039                         }
2040                         break;
2041                 case Opt_tpgt:
2042                         ret = match_int(args, &arg);
2043                         if (ret)
2044                                 goto out;
2045                         tpgt = (u16)arg;
2046                         break;
2047                 case Opt_port_rtpi:
2048                         ret = match_int(args, &arg);
2049                         if (ret)
2050                                 goto out;
2051                         break;
2052                 case Opt_target_lun:
2053                         ret = match_u64(args, &tmp_ll);
2054                         if (ret)
2055                                 goto out;
2056                         target_lun = (u64)tmp_ll;
2057                         break;
2058                 default:
2059                         break;
2060                 }
2061         }
2062
2063         if (!i_port || !t_port || !sa_res_key) {
2064                 pr_err("Illegal parameters for APTPL registration\n");
2065                 ret = -EINVAL;
2066                 goto out;
2067         }
2068
2069         if (res_holder && !(type)) {
2070                 pr_err("Illegal PR type: 0x%02x for reservation"
2071                                 " holder\n", type);
2072                 ret = -EINVAL;
2073                 goto out;
2074         }
2075
2076         ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
2077                         i_port, isid, mapped_lun, t_port, tpgt, target_lun,
2078                         res_holder, all_tg_pt, type);
2079 out:
2080         kfree(i_fabric);
2081         kfree(i_port);
2082         kfree(isid);
2083         kfree(t_fabric);
2084         kfree(t_port);
2085         kfree(orig);
2086         return (ret == 0) ? count : ret;
2087 }
2088
2089
2090 CONFIGFS_ATTR_RO(target_pr_, res_holder);
2091 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts);
2092 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation);
2093 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port);
2094 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts);
2095 CONFIGFS_ATTR_RO(target_pr_, res_pr_type);
2096 CONFIGFS_ATTR_RO(target_pr_, res_type);
2097 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active);
2098 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata);
2099
2100 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
2101         &target_pr_attr_res_holder,
2102         &target_pr_attr_res_pr_all_tgt_pts,
2103         &target_pr_attr_res_pr_generation,
2104         &target_pr_attr_res_pr_holder_tg_port,
2105         &target_pr_attr_res_pr_registered_i_pts,
2106         &target_pr_attr_res_pr_type,
2107         &target_pr_attr_res_type,
2108         &target_pr_attr_res_aptpl_active,
2109         &target_pr_attr_res_aptpl_metadata,
2110         NULL,
2111 };
2112
2113 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs);
2114
2115 /*  End functions for struct config_item_type tb_dev_pr_cit */
2116
2117 /*  Start functions for struct config_item_type tb_dev_cit */
2118
2119 static inline struct se_device *to_device(struct config_item *item)
2120 {
2121         return container_of(to_config_group(item), struct se_device, dev_group);
2122 }
2123
2124 static ssize_t target_dev_info_show(struct config_item *item, char *page)
2125 {
2126         struct se_device *dev = to_device(item);
2127         int bl = 0;
2128         ssize_t read_bytes = 0;
2129
2130         transport_dump_dev_state(dev, page, &bl);
2131         read_bytes += bl;
2132         read_bytes += dev->transport->show_configfs_dev_params(dev,
2133                         page+read_bytes);
2134         return read_bytes;
2135 }
2136
2137 static ssize_t target_dev_control_store(struct config_item *item,
2138                 const char *page, size_t count)
2139 {
2140         struct se_device *dev = to_device(item);
2141
2142         return dev->transport->set_configfs_dev_params(dev, page, count);
2143 }
2144
2145 static ssize_t target_dev_alias_show(struct config_item *item, char *page)
2146 {
2147         struct se_device *dev = to_device(item);
2148
2149         if (!(dev->dev_flags & DF_USING_ALIAS))
2150                 return 0;
2151
2152         return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
2153 }
2154
2155 static ssize_t target_dev_alias_store(struct config_item *item,
2156                 const char *page, size_t count)
2157 {
2158         struct se_device *dev = to_device(item);
2159         struct se_hba *hba = dev->se_hba;
2160         ssize_t read_bytes;
2161
2162         if (count > (SE_DEV_ALIAS_LEN-1)) {
2163                 pr_err("alias count: %d exceeds"
2164                         " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
2165                         SE_DEV_ALIAS_LEN-1);
2166                 return -EINVAL;
2167         }
2168
2169         read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
2170         if (!read_bytes)
2171                 return -EINVAL;
2172         if (dev->dev_alias[read_bytes - 1] == '\n')
2173                 dev->dev_alias[read_bytes - 1] = '\0';
2174
2175         dev->dev_flags |= DF_USING_ALIAS;
2176
2177         pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
2178                 config_item_name(&hba->hba_group.cg_item),
2179                 config_item_name(&dev->dev_group.cg_item),
2180                 dev->dev_alias);
2181
2182         return read_bytes;
2183 }
2184
2185 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page)
2186 {
2187         struct se_device *dev = to_device(item);
2188
2189         if (!(dev->dev_flags & DF_USING_UDEV_PATH))
2190                 return 0;
2191
2192         return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
2193 }
2194
2195 static ssize_t target_dev_udev_path_store(struct config_item *item,
2196                 const char *page, size_t count)
2197 {
2198         struct se_device *dev = to_device(item);
2199         struct se_hba *hba = dev->se_hba;
2200         ssize_t read_bytes;
2201
2202         if (count > (SE_UDEV_PATH_LEN-1)) {
2203                 pr_err("udev_path count: %d exceeds"
2204                         " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
2205                         SE_UDEV_PATH_LEN-1);
2206                 return -EINVAL;
2207         }
2208
2209         read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
2210                         "%s", page);
2211         if (!read_bytes)
2212                 return -EINVAL;
2213         if (dev->udev_path[read_bytes - 1] == '\n')
2214                 dev->udev_path[read_bytes - 1] = '\0';
2215
2216         dev->dev_flags |= DF_USING_UDEV_PATH;
2217
2218         pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
2219                 config_item_name(&hba->hba_group.cg_item),
2220                 config_item_name(&dev->dev_group.cg_item),
2221                 dev->udev_path);
2222
2223         return read_bytes;
2224 }
2225
2226 static ssize_t target_dev_enable_show(struct config_item *item, char *page)
2227 {
2228         struct se_device *dev = to_device(item);
2229
2230         return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev));
2231 }
2232
2233 static ssize_t target_dev_enable_store(struct config_item *item,
2234                 const char *page, size_t count)
2235 {
2236         struct se_device *dev = to_device(item);
2237         char *ptr;
2238         int ret;
2239
2240         ptr = strstr(page, "1");
2241         if (!ptr) {
2242                 pr_err("For dev_enable ops, only valid value"
2243                                 " is \"1\"\n");
2244                 return -EINVAL;
2245         }
2246
2247         ret = target_configure_device(dev);
2248         if (ret)
2249                 return ret;
2250         return count;
2251 }
2252
2253 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page)
2254 {
2255         struct se_device *dev = to_device(item);
2256         struct config_item *lu_ci;
2257         struct t10_alua_lu_gp *lu_gp;
2258         struct t10_alua_lu_gp_member *lu_gp_mem;
2259         ssize_t len = 0;
2260
2261         lu_gp_mem = dev->dev_alua_lu_gp_mem;
2262         if (!lu_gp_mem)
2263                 return 0;
2264
2265         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2266         lu_gp = lu_gp_mem->lu_gp;
2267         if (lu_gp) {
2268                 lu_ci = &lu_gp->lu_gp_group.cg_item;
2269                 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
2270                         config_item_name(lu_ci), lu_gp->lu_gp_id);
2271         }
2272         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2273
2274         return len;
2275 }
2276
2277 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item,
2278                 const char *page, size_t count)
2279 {
2280         struct se_device *dev = to_device(item);
2281         struct se_hba *hba = dev->se_hba;
2282         struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
2283         struct t10_alua_lu_gp_member *lu_gp_mem;
2284         unsigned char buf[LU_GROUP_NAME_BUF] = { };
2285         int move = 0;
2286
2287         lu_gp_mem = dev->dev_alua_lu_gp_mem;
2288         if (!lu_gp_mem)
2289                 return count;
2290
2291         if (count > LU_GROUP_NAME_BUF) {
2292                 pr_err("ALUA LU Group Alias too large!\n");
2293                 return -EINVAL;
2294         }
2295         memcpy(buf, page, count);
2296         /*
2297          * Any ALUA logical unit alias besides "NULL" means we will be
2298          * making a new group association.
2299          */
2300         if (strcmp(strstrip(buf), "NULL")) {
2301                 /*
2302                  * core_alua_get_lu_gp_by_name() will increment reference to
2303                  * struct t10_alua_lu_gp.  This reference is released with
2304                  * core_alua_get_lu_gp_by_name below().
2305                  */
2306                 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
2307                 if (!lu_gp_new)
2308                         return -ENODEV;
2309         }
2310
2311         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2312         lu_gp = lu_gp_mem->lu_gp;
2313         if (lu_gp) {
2314                 /*
2315                  * Clearing an existing lu_gp association, and replacing
2316                  * with NULL
2317                  */
2318                 if (!lu_gp_new) {
2319                         pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
2320                                 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
2321                                 " %hu\n",
2322                                 config_item_name(&hba->hba_group.cg_item),
2323                                 config_item_name(&dev->dev_group.cg_item),
2324                                 config_item_name(&lu_gp->lu_gp_group.cg_item),
2325                                 lu_gp->lu_gp_id);
2326
2327                         __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2328                         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2329
2330                         return count;
2331                 }
2332                 /*
2333                  * Removing existing association of lu_gp_mem with lu_gp
2334                  */
2335                 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2336                 move = 1;
2337         }
2338         /*
2339          * Associate lu_gp_mem with lu_gp_new.
2340          */
2341         __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
2342         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2343
2344         pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
2345                 " core/alua/lu_gps/%s, ID: %hu\n",
2346                 (move) ? "Moving" : "Adding",
2347                 config_item_name(&hba->hba_group.cg_item),
2348                 config_item_name(&dev->dev_group.cg_item),
2349                 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
2350                 lu_gp_new->lu_gp_id);
2351
2352         core_alua_put_lu_gp_from_name(lu_gp_new);
2353         return count;
2354 }
2355
2356 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page)
2357 {
2358         struct se_device *dev = to_device(item);
2359         struct t10_alua_lba_map *map;
2360         struct t10_alua_lba_map_member *mem;
2361         char *b = page;
2362         int bl = 0;
2363         char state;
2364
2365         spin_lock(&dev->t10_alua.lba_map_lock);
2366         if (!list_empty(&dev->t10_alua.lba_map_list))
2367             bl += sprintf(b + bl, "%u %u\n",
2368                           dev->t10_alua.lba_map_segment_size,
2369                           dev->t10_alua.lba_map_segment_multiplier);
2370         list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
2371                 bl += sprintf(b + bl, "%llu %llu",
2372                               map->lba_map_first_lba, map->lba_map_last_lba);
2373                 list_for_each_entry(mem, &map->lba_map_mem_list,
2374                                     lba_map_mem_list) {
2375                         switch (mem->lba_map_mem_alua_state) {
2376                         case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
2377                                 state = 'O';
2378                                 break;
2379                         case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
2380                                 state = 'A';
2381                                 break;
2382                         case ALUA_ACCESS_STATE_STANDBY:
2383                                 state = 'S';
2384                                 break;
2385                         case ALUA_ACCESS_STATE_UNAVAILABLE:
2386                                 state = 'U';
2387                                 break;
2388                         default:
2389                                 state = '.';
2390                                 break;
2391                         }
2392                         bl += sprintf(b + bl, " %d:%c",
2393                                       mem->lba_map_mem_alua_pg_id, state);
2394                 }
2395                 bl += sprintf(b + bl, "\n");
2396         }
2397         spin_unlock(&dev->t10_alua.lba_map_lock);
2398         return bl;
2399 }
2400
2401 static ssize_t target_dev_lba_map_store(struct config_item *item,
2402                 const char *page, size_t count)
2403 {
2404         struct se_device *dev = to_device(item);
2405         struct t10_alua_lba_map *lba_map = NULL;
2406         struct list_head lba_list;
2407         char *map_entries, *orig, *ptr;
2408         char state;
2409         int pg_num = -1, pg;
2410         int ret = 0, num = 0, pg_id, alua_state;
2411         unsigned long start_lba = -1, end_lba = -1;
2412         unsigned long segment_size = -1, segment_mult = -1;
2413
2414         orig = map_entries = kstrdup(page, GFP_KERNEL);
2415         if (!map_entries)
2416                 return -ENOMEM;
2417
2418         INIT_LIST_HEAD(&lba_list);
2419         while ((ptr = strsep(&map_entries, "\n")) != NULL) {
2420                 if (!*ptr)
2421                         continue;
2422
2423                 if (num == 0) {
2424                         if (sscanf(ptr, "%lu %lu\n",
2425                                    &segment_size, &segment_mult) != 2) {
2426                                 pr_err("Invalid line %d\n", num);
2427                                 ret = -EINVAL;
2428                                 break;
2429                         }
2430                         num++;
2431                         continue;
2432                 }
2433                 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2434                         pr_err("Invalid line %d\n", num);
2435                         ret = -EINVAL;
2436                         break;
2437                 }
2438                 ptr = strchr(ptr, ' ');
2439                 if (!ptr) {
2440                         pr_err("Invalid line %d, missing end lba\n", num);
2441                         ret = -EINVAL;
2442                         break;
2443                 }
2444                 ptr++;
2445                 ptr = strchr(ptr, ' ');
2446                 if (!ptr) {
2447                         pr_err("Invalid line %d, missing state definitions\n",
2448                                num);
2449                         ret = -EINVAL;
2450                         break;
2451                 }
2452                 ptr++;
2453                 lba_map = core_alua_allocate_lba_map(&lba_list,
2454                                                      start_lba, end_lba);
2455                 if (IS_ERR(lba_map)) {
2456                         ret = PTR_ERR(lba_map);
2457                         break;
2458                 }
2459                 pg = 0;
2460                 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2461                         switch (state) {
2462                         case 'O':
2463                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2464                                 break;
2465                         case 'A':
2466                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2467                                 break;
2468                         case 'S':
2469                                 alua_state = ALUA_ACCESS_STATE_STANDBY;
2470                                 break;
2471                         case 'U':
2472                                 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2473                                 break;
2474                         default:
2475                                 pr_err("Invalid ALUA state '%c'\n", state);
2476                                 ret = -EINVAL;
2477                                 goto out;
2478                         }
2479
2480                         ret = core_alua_allocate_lba_map_mem(lba_map,
2481                                                              pg_id, alua_state);
2482                         if (ret) {
2483                                 pr_err("Invalid target descriptor %d:%c "
2484                                        "at line %d\n",
2485                                        pg_id, state, num);
2486                                 break;
2487                         }
2488                         pg++;
2489                         ptr = strchr(ptr, ' ');
2490                         if (ptr)
2491                                 ptr++;
2492                         else
2493                                 break;
2494                 }
2495                 if (pg_num == -1)
2496                     pg_num = pg;
2497                 else if (pg != pg_num) {
2498                         pr_err("Only %d from %d port groups definitions "
2499                                "at line %d\n", pg, pg_num, num);
2500                         ret = -EINVAL;
2501                         break;
2502                 }
2503                 num++;
2504         }
2505 out:
2506         if (ret) {
2507                 core_alua_free_lba_map(&lba_list);
2508                 count = ret;
2509         } else
2510                 core_alua_set_lba_map(dev, &lba_list,
2511                                       segment_size, segment_mult);
2512         kfree(orig);
2513         return count;
2514 }
2515
2516 CONFIGFS_ATTR_RO(target_dev_, info);
2517 CONFIGFS_ATTR_WO(target_dev_, control);
2518 CONFIGFS_ATTR(target_dev_, alias);
2519 CONFIGFS_ATTR(target_dev_, udev_path);
2520 CONFIGFS_ATTR(target_dev_, enable);
2521 CONFIGFS_ATTR(target_dev_, alua_lu_gp);
2522 CONFIGFS_ATTR(target_dev_, lba_map);
2523
2524 static struct configfs_attribute *target_core_dev_attrs[] = {
2525         &target_dev_attr_info,
2526         &target_dev_attr_control,
2527         &target_dev_attr_alias,
2528         &target_dev_attr_udev_path,
2529         &target_dev_attr_enable,
2530         &target_dev_attr_alua_lu_gp,
2531         &target_dev_attr_lba_map,
2532         NULL,
2533 };
2534
2535 static void target_core_dev_release(struct config_item *item)
2536 {
2537         struct config_group *dev_cg = to_config_group(item);
2538         struct se_device *dev =
2539                 container_of(dev_cg, struct se_device, dev_group);
2540
2541         target_free_device(dev);
2542 }
2543
2544 /*
2545  * Used in target_core_fabric_configfs.c to verify valid se_device symlink
2546  * within target_fabric_port_link()
2547  */
2548 struct configfs_item_operations target_core_dev_item_ops = {
2549         .release                = target_core_dev_release,
2550 };
2551
2552 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2553
2554 /* End functions for struct config_item_type tb_dev_cit */
2555
2556 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2557
2558 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item)
2559 {
2560         return container_of(to_config_group(item), struct t10_alua_lu_gp,
2561                         lu_gp_group);
2562 }
2563
2564 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page)
2565 {
2566         struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2567
2568         if (!lu_gp->lu_gp_valid_id)
2569                 return 0;
2570         return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2571 }
2572
2573 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item,
2574                 const char *page, size_t count)
2575 {
2576         struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2577         struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2578         unsigned long lu_gp_id;
2579         int ret;
2580
2581         ret = kstrtoul(page, 0, &lu_gp_id);
2582         if (ret < 0) {
2583                 pr_err("kstrtoul() returned %d for"
2584                         " lu_gp_id\n", ret);
2585                 return ret;
2586         }
2587         if (lu_gp_id > 0x0000ffff) {
2588                 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2589                         " 0x0000ffff\n", lu_gp_id);
2590                 return -EINVAL;
2591         }
2592
2593         ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2594         if (ret < 0)
2595                 return -EINVAL;
2596
2597         pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2598                 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2599                 config_item_name(&alua_lu_gp_cg->cg_item),
2600                 lu_gp->lu_gp_id);
2601
2602         return count;
2603 }
2604
2605 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
2606 {
2607         struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2608         struct se_device *dev;
2609         struct se_hba *hba;
2610         struct t10_alua_lu_gp_member *lu_gp_mem;
2611         ssize_t len = 0, cur_len;
2612         unsigned char buf[LU_GROUP_NAME_BUF] = { };
2613
2614         spin_lock(&lu_gp->lu_gp_lock);
2615         list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2616                 dev = lu_gp_mem->lu_gp_mem_dev;
2617                 hba = dev->se_hba;
2618
2619                 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2620                         config_item_name(&hba->hba_group.cg_item),
2621                         config_item_name(&dev->dev_group.cg_item));
2622                 cur_len++; /* Extra byte for NULL terminator */
2623
2624                 if ((cur_len + len) > PAGE_SIZE) {
2625                         pr_warn("Ran out of lu_gp_show_attr"
2626                                 "_members buffer\n");
2627                         break;
2628                 }
2629                 memcpy(page+len, buf, cur_len);
2630                 len += cur_len;
2631         }
2632         spin_unlock(&lu_gp->lu_gp_lock);
2633
2634         return len;
2635 }
2636
2637 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id);
2638 CONFIGFS_ATTR_RO(target_lu_gp_, members);
2639
2640 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2641         &target_lu_gp_attr_lu_gp_id,
2642         &target_lu_gp_attr_members,
2643         NULL,
2644 };
2645
2646 static void target_core_alua_lu_gp_release(struct config_item *item)
2647 {
2648         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2649                         struct t10_alua_lu_gp, lu_gp_group);
2650
2651         core_alua_free_lu_gp(lu_gp);
2652 }
2653
2654 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2655         .release                = target_core_alua_lu_gp_release,
2656 };
2657
2658 static const struct config_item_type target_core_alua_lu_gp_cit = {
2659         .ct_item_ops            = &target_core_alua_lu_gp_ops,
2660         .ct_attrs               = target_core_alua_lu_gp_attrs,
2661         .ct_owner               = THIS_MODULE,
2662 };
2663
2664 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2665
2666 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2667
2668 static struct config_group *target_core_alua_create_lu_gp(
2669         struct config_group *group,
2670         const char *name)
2671 {
2672         struct t10_alua_lu_gp *lu_gp;
2673         struct config_group *alua_lu_gp_cg = NULL;
2674         struct config_item *alua_lu_gp_ci = NULL;
2675
2676         lu_gp = core_alua_allocate_lu_gp(name, 0);
2677         if (IS_ERR(lu_gp))
2678                 return NULL;
2679
2680         alua_lu_gp_cg = &lu_gp->lu_gp_group;
2681         alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2682
2683         config_group_init_type_name(alua_lu_gp_cg, name,
2684                         &target_core_alua_lu_gp_cit);
2685
2686         pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2687                 " Group: core/alua/lu_gps/%s\n",
2688                 config_item_name(alua_lu_gp_ci));
2689
2690         return alua_lu_gp_cg;
2691
2692 }
2693
2694 static void target_core_alua_drop_lu_gp(
2695         struct config_group *group,
2696         struct config_item *item)
2697 {
2698         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2699                         struct t10_alua_lu_gp, lu_gp_group);
2700
2701         pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2702                 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2703                 config_item_name(item), lu_gp->lu_gp_id);
2704         /*
2705          * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2706          * -> target_core_alua_lu_gp_release()
2707          */
2708         config_item_put(item);
2709 }
2710
2711 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2712         .make_group             = &target_core_alua_create_lu_gp,
2713         .drop_item              = &target_core_alua_drop_lu_gp,
2714 };
2715
2716 static const struct config_item_type target_core_alua_lu_gps_cit = {
2717         .ct_item_ops            = NULL,
2718         .ct_group_ops           = &target_core_alua_lu_gps_group_ops,
2719         .ct_owner               = THIS_MODULE,
2720 };
2721
2722 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2723
2724 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2725
2726 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item)
2727 {
2728         return container_of(to_config_group(item), struct t10_alua_tg_pt_gp,
2729                         tg_pt_gp_group);
2730 }
2731
2732 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item,
2733                 char *page)
2734 {
2735         return sprintf(page, "%d\n",
2736                        to_tg_pt_gp(item)->tg_pt_gp_alua_access_state);
2737 }
2738
2739 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item,
2740                 const char *page, size_t count)
2741 {
2742         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2743         struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2744         unsigned long tmp;
2745         int new_state, ret;
2746
2747         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2748                 pr_err("Unable to do implicit ALUA on invalid tg_pt_gp ID\n");
2749                 return -EINVAL;
2750         }
2751         if (!target_dev_configured(dev)) {
2752                 pr_err("Unable to set alua_access_state while device is"
2753                        " not configured\n");
2754                 return -ENODEV;
2755         }
2756
2757         ret = kstrtoul(page, 0, &tmp);
2758         if (ret < 0) {
2759                 pr_err("Unable to extract new ALUA access state from"
2760                                 " %s\n", page);
2761                 return ret;
2762         }
2763         new_state = (int)tmp;
2764
2765         if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2766                 pr_err("Unable to process implicit configfs ALUA"
2767                         " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2768                 return -EINVAL;
2769         }
2770         if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2771             new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2772                 /* LBA DEPENDENT is only allowed with implicit ALUA */
2773                 pr_err("Unable to process implicit configfs ALUA transition"
2774                        " while explicit ALUA management is enabled\n");
2775                 return -EINVAL;
2776         }
2777
2778         ret = core_alua_do_port_transition(tg_pt_gp, dev,
2779                                         NULL, NULL, new_state, 0);
2780         return (!ret) ? count : -EINVAL;
2781 }
2782
2783 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item,
2784                 char *page)
2785 {
2786         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2787         return sprintf(page, "%s\n",
2788                 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2789 }
2790
2791 static ssize_t target_tg_pt_gp_alua_access_status_store(
2792                 struct config_item *item, const char *page, size_t count)
2793 {
2794         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2795         unsigned long tmp;
2796         int new_status, ret;
2797
2798         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2799                 pr_err("Unable to set ALUA access status on invalid tg_pt_gp ID\n");
2800                 return -EINVAL;
2801         }
2802
2803         ret = kstrtoul(page, 0, &tmp);
2804         if (ret < 0) {
2805                 pr_err("Unable to extract new ALUA access status"
2806                                 " from %s\n", page);
2807                 return ret;
2808         }
2809         new_status = (int)tmp;
2810
2811         if ((new_status != ALUA_STATUS_NONE) &&
2812             (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2813             (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2814                 pr_err("Illegal ALUA access status: 0x%02x\n",
2815                                 new_status);
2816                 return -EINVAL;
2817         }
2818
2819         tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2820         return count;
2821 }
2822
2823 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item,
2824                 char *page)
2825 {
2826         return core_alua_show_access_type(to_tg_pt_gp(item), page);
2827 }
2828
2829 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item,
2830                 const char *page, size_t count)
2831 {
2832         return core_alua_store_access_type(to_tg_pt_gp(item), page, count);
2833 }
2834
2835 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit)                          \
2836 static ssize_t target_tg_pt_gp_alua_support_##_name##_show(             \
2837                 struct config_item *item, char *p)                      \
2838 {                                                                       \
2839         struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item);                \
2840         return sprintf(p, "%d\n",                                       \
2841                 !!(t->tg_pt_gp_alua_supported_states & _bit));          \
2842 }                                                                       \
2843                                                                         \
2844 static ssize_t target_tg_pt_gp_alua_support_##_name##_store(            \
2845                 struct config_item *item, const char *p, size_t c)      \
2846 {                                                                       \
2847         struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item);                \
2848         unsigned long tmp;                                              \
2849         int ret;                                                        \
2850                                                                         \
2851         if (!t->tg_pt_gp_valid_id) {                                    \
2852                 pr_err("Unable to set " #_name " ALUA state on invalid tg_pt_gp ID\n"); \
2853                 return -EINVAL;                                         \
2854         }                                                               \
2855                                                                         \
2856         ret = kstrtoul(p, 0, &tmp);                                     \
2857         if (ret < 0) {                                                  \
2858                 pr_err("Invalid value '%s', must be '0' or '1'\n", p);  \
2859                 return -EINVAL;                                         \
2860         }                                                               \
2861         if (tmp > 1) {                                                  \
2862                 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2863                 return -EINVAL;                                         \
2864         }                                                               \
2865         if (tmp)                                                        \
2866                 t->tg_pt_gp_alua_supported_states |= _bit;              \
2867         else                                                            \
2868                 t->tg_pt_gp_alua_supported_states &= ~_bit;             \
2869                                                                         \
2870         return c;                                                       \
2871 }
2872
2873 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP);
2874 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP);
2875 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP);
2876 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP);
2877 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP);
2878 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP);
2879 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP);
2880
2881 static ssize_t target_tg_pt_gp_alua_write_metadata_show(
2882                 struct config_item *item, char *page)
2883 {
2884         return sprintf(page, "%d\n",
2885                 to_tg_pt_gp(item)->tg_pt_gp_write_metadata);
2886 }
2887
2888 static ssize_t target_tg_pt_gp_alua_write_metadata_store(
2889                 struct config_item *item, const char *page, size_t count)
2890 {
2891         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2892         unsigned long tmp;
2893         int ret;
2894
2895         ret = kstrtoul(page, 0, &tmp);
2896         if (ret < 0) {
2897                 pr_err("Unable to extract alua_write_metadata\n");
2898                 return ret;
2899         }
2900
2901         if ((tmp != 0) && (tmp != 1)) {
2902                 pr_err("Illegal value for alua_write_metadata:"
2903                         " %lu\n", tmp);
2904                 return -EINVAL;
2905         }
2906         tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2907
2908         return count;
2909 }
2910
2911 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item,
2912                 char *page)
2913 {
2914         return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page);
2915 }
2916
2917 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item,
2918                 const char *page, size_t count)
2919 {
2920         return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page,
2921                         count);
2922 }
2923
2924 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item,
2925                 char *page)
2926 {
2927         return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page);
2928 }
2929
2930 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item,
2931                 const char *page, size_t count)
2932 {
2933         return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page,
2934                         count);
2935 }
2936
2937 static ssize_t target_tg_pt_gp_implicit_trans_secs_show(
2938                 struct config_item *item, char *page)
2939 {
2940         return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page);
2941 }
2942
2943 static ssize_t target_tg_pt_gp_implicit_trans_secs_store(
2944                 struct config_item *item, const char *page, size_t count)
2945 {
2946         return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page,
2947                         count);
2948 }
2949
2950 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item,
2951                 char *page)
2952 {
2953         return core_alua_show_preferred_bit(to_tg_pt_gp(item), page);
2954 }
2955
2956 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item,
2957                 const char *page, size_t count)
2958 {
2959         return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count);
2960 }
2961
2962 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item,
2963                 char *page)
2964 {
2965         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2966
2967         if (!tg_pt_gp->tg_pt_gp_valid_id)
2968                 return 0;
2969         return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2970 }
2971
2972 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item,
2973                 const char *page, size_t count)
2974 {
2975         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2976         struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2977         unsigned long tg_pt_gp_id;
2978         int ret;
2979
2980         ret = kstrtoul(page, 0, &tg_pt_gp_id);
2981         if (ret < 0) {
2982                 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n",
2983                        page);
2984                 return ret;
2985         }
2986         if (tg_pt_gp_id > 0x0000ffff) {
2987                 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n",
2988                        tg_pt_gp_id);
2989                 return -EINVAL;
2990         }
2991
2992         ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2993         if (ret < 0)
2994                 return -EINVAL;
2995
2996         pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2997                 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2998                 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2999                 tg_pt_gp->tg_pt_gp_id);
3000
3001         return count;
3002 }
3003
3004 static ssize_t target_tg_pt_gp_members_show(struct config_item *item,
3005                 char *page)
3006 {
3007         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
3008         struct se_lun *lun;
3009         ssize_t len = 0, cur_len;
3010         unsigned char buf[TG_PT_GROUP_NAME_BUF] = { };
3011
3012         spin_lock(&tg_pt_gp->tg_pt_gp_lock);
3013         list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
3014                         lun_tg_pt_gp_link) {
3015                 struct se_portal_group *tpg = lun->lun_tpg;
3016
3017                 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
3018                         "/%s\n", tpg->se_tpg_tfo->fabric_name,
3019                         tpg->se_tpg_tfo->tpg_get_wwn(tpg),
3020                         tpg->se_tpg_tfo->tpg_get_tag(tpg),
3021                         config_item_name(&lun->lun_group.cg_item));
3022                 cur_len++; /* Extra byte for NULL terminator */
3023
3024                 if ((cur_len + len) > PAGE_SIZE) {
3025                         pr_warn("Ran out of lu_gp_show_attr"
3026                                 "_members buffer\n");
3027                         break;
3028                 }
3029                 memcpy(page+len, buf, cur_len);
3030                 len += cur_len;
3031         }
3032         spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
3033
3034         return len;
3035 }
3036
3037 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state);
3038 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status);
3039 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type);
3040 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning);
3041 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline);
3042 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent);
3043 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable);
3044 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby);
3045 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized);
3046 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized);
3047 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata);
3048 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs);
3049 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs);
3050 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs);
3051 CONFIGFS_ATTR(target_tg_pt_gp_, preferred);
3052 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id);
3053 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members);
3054
3055 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
3056         &target_tg_pt_gp_attr_alua_access_state,
3057         &target_tg_pt_gp_attr_alua_access_status,
3058         &target_tg_pt_gp_attr_alua_access_type,
3059         &target_tg_pt_gp_attr_alua_support_transitioning,
3060         &target_tg_pt_gp_attr_alua_support_offline,
3061         &target_tg_pt_gp_attr_alua_support_lba_dependent,
3062         &target_tg_pt_gp_attr_alua_support_unavailable,
3063         &target_tg_pt_gp_attr_alua_support_standby,
3064         &target_tg_pt_gp_attr_alua_support_active_nonoptimized,
3065         &target_tg_pt_gp_attr_alua_support_active_optimized,
3066         &target_tg_pt_gp_attr_alua_write_metadata,
3067         &target_tg_pt_gp_attr_nonop_delay_msecs,
3068         &target_tg_pt_gp_attr_trans_delay_msecs,
3069         &target_tg_pt_gp_attr_implicit_trans_secs,
3070         &target_tg_pt_gp_attr_preferred,
3071         &target_tg_pt_gp_attr_tg_pt_gp_id,
3072         &target_tg_pt_gp_attr_members,
3073         NULL,
3074 };
3075
3076 static void target_core_alua_tg_pt_gp_release(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         core_alua_free_tg_pt_gp(tg_pt_gp);
3082 }
3083
3084 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
3085         .release                = target_core_alua_tg_pt_gp_release,
3086 };
3087
3088 static const struct config_item_type target_core_alua_tg_pt_gp_cit = {
3089         .ct_item_ops            = &target_core_alua_tg_pt_gp_ops,
3090         .ct_attrs               = target_core_alua_tg_pt_gp_attrs,
3091         .ct_owner               = THIS_MODULE,
3092 };
3093
3094 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
3095
3096 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3097
3098 static struct config_group *target_core_alua_create_tg_pt_gp(
3099         struct config_group *group,
3100         const char *name)
3101 {
3102         struct t10_alua *alua = container_of(group, struct t10_alua,
3103                                         alua_tg_pt_gps_group);
3104         struct t10_alua_tg_pt_gp *tg_pt_gp;
3105         struct config_group *alua_tg_pt_gp_cg = NULL;
3106         struct config_item *alua_tg_pt_gp_ci = NULL;
3107
3108         tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
3109         if (!tg_pt_gp)
3110                 return NULL;
3111
3112         alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
3113         alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
3114
3115         config_group_init_type_name(alua_tg_pt_gp_cg, name,
3116                         &target_core_alua_tg_pt_gp_cit);
3117
3118         pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
3119                 " Group: alua/tg_pt_gps/%s\n",
3120                 config_item_name(alua_tg_pt_gp_ci));
3121
3122         return alua_tg_pt_gp_cg;
3123 }
3124
3125 static void target_core_alua_drop_tg_pt_gp(
3126         struct config_group *group,
3127         struct config_item *item)
3128 {
3129         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3130                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3131
3132         pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
3133                 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
3134                 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
3135         /*
3136          * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
3137          * -> target_core_alua_tg_pt_gp_release().
3138          */
3139         config_item_put(item);
3140 }
3141
3142 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
3143         .make_group             = &target_core_alua_create_tg_pt_gp,
3144         .drop_item              = &target_core_alua_drop_tg_pt_gp,
3145 };
3146
3147 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
3148
3149 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3150
3151 /* Start functions for struct config_item_type target_core_alua_cit */
3152
3153 /*
3154  * target_core_alua_cit is a ConfigFS group that lives under
3155  * /sys/kernel/config/target/core/alua.  There are default groups
3156  * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
3157  * target_core_alua_cit in target_core_init_configfs() below.
3158  */
3159 static const struct config_item_type target_core_alua_cit = {
3160         .ct_item_ops            = NULL,
3161         .ct_attrs               = NULL,
3162         .ct_owner               = THIS_MODULE,
3163 };
3164
3165 /* End functions for struct config_item_type target_core_alua_cit */
3166
3167 /* Start functions for struct config_item_type tb_dev_stat_cit */
3168
3169 static struct config_group *target_core_stat_mkdir(
3170         struct config_group *group,
3171         const char *name)
3172 {
3173         return ERR_PTR(-ENOSYS);
3174 }
3175
3176 static void target_core_stat_rmdir(
3177         struct config_group *group,
3178         struct config_item *item)
3179 {
3180         return;
3181 }
3182
3183 static struct configfs_group_operations target_core_stat_group_ops = {
3184         .make_group             = &target_core_stat_mkdir,
3185         .drop_item              = &target_core_stat_rmdir,
3186 };
3187
3188 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
3189
3190 /* End functions for struct config_item_type tb_dev_stat_cit */
3191
3192 /* Start functions for struct config_item_type target_core_hba_cit */
3193
3194 static struct config_group *target_core_make_subdev(
3195         struct config_group *group,
3196         const char *name)
3197 {
3198         struct t10_alua_tg_pt_gp *tg_pt_gp;
3199         struct config_item *hba_ci = &group->cg_item;
3200         struct se_hba *hba = item_to_hba(hba_ci);
3201         struct target_backend *tb = hba->backend;
3202         struct se_device *dev;
3203         int errno = -ENOMEM, ret;
3204
3205         ret = mutex_lock_interruptible(&hba->hba_access_mutex);
3206         if (ret)
3207                 return ERR_PTR(ret);
3208
3209         dev = target_alloc_device(hba, name);
3210         if (!dev)
3211                 goto out_unlock;
3212
3213         config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit);
3214
3215         config_group_init_type_name(&dev->dev_action_group, "action",
3216                         &tb->tb_dev_action_cit);
3217         configfs_add_default_group(&dev->dev_action_group, &dev->dev_group);
3218
3219         config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
3220                         &tb->tb_dev_attrib_cit);
3221         configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group);
3222
3223         config_group_init_type_name(&dev->dev_pr_group, "pr",
3224                         &tb->tb_dev_pr_cit);
3225         configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group);
3226
3227         config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
3228                         &tb->tb_dev_wwn_cit);
3229         configfs_add_default_group(&dev->t10_wwn.t10_wwn_group,
3230                         &dev->dev_group);
3231
3232         config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
3233                         "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
3234         configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group,
3235                         &dev->dev_group);
3236
3237         config_group_init_type_name(&dev->dev_stat_grps.stat_group,
3238                         "statistics", &tb->tb_dev_stat_cit);
3239         configfs_add_default_group(&dev->dev_stat_grps.stat_group,
3240                         &dev->dev_group);
3241
3242         /*
3243          * Add core/$HBA/$DEV/alua/default_tg_pt_gp
3244          */
3245         tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
3246         if (!tg_pt_gp)
3247                 goto out_free_device;
3248         dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
3249
3250         config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
3251                         "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
3252         configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group,
3253                         &dev->t10_alua.alua_tg_pt_gps_group);
3254
3255         /*
3256          * Add core/$HBA/$DEV/statistics/ default groups
3257          */
3258         target_stat_setup_dev_default_groups(dev);
3259
3260         mutex_unlock(&hba->hba_access_mutex);
3261         return &dev->dev_group;
3262
3263 out_free_device:
3264         target_free_device(dev);
3265 out_unlock:
3266         mutex_unlock(&hba->hba_access_mutex);
3267         return ERR_PTR(errno);
3268 }
3269
3270 static void target_core_drop_subdev(
3271         struct config_group *group,
3272         struct config_item *item)
3273 {
3274         struct config_group *dev_cg = to_config_group(item);
3275         struct se_device *dev =
3276                 container_of(dev_cg, struct se_device, dev_group);
3277         struct se_hba *hba;
3278
3279         hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
3280
3281         mutex_lock(&hba->hba_access_mutex);
3282
3283         configfs_remove_default_groups(&dev->dev_stat_grps.stat_group);
3284         configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group);
3285
3286         /*
3287          * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
3288          * directly from target_core_alua_tg_pt_gp_release().
3289          */
3290         dev->t10_alua.default_tg_pt_gp = NULL;
3291
3292         configfs_remove_default_groups(dev_cg);
3293
3294         /*
3295          * se_dev is released from target_core_dev_item_ops->release()
3296          */
3297         config_item_put(item);
3298         mutex_unlock(&hba->hba_access_mutex);
3299 }
3300
3301 static struct configfs_group_operations target_core_hba_group_ops = {
3302         .make_group             = target_core_make_subdev,
3303         .drop_item              = target_core_drop_subdev,
3304 };
3305
3306
3307 static inline struct se_hba *to_hba(struct config_item *item)
3308 {
3309         return container_of(to_config_group(item), struct se_hba, hba_group);
3310 }
3311
3312 static ssize_t target_hba_info_show(struct config_item *item, char *page)
3313 {
3314         struct se_hba *hba = to_hba(item);
3315
3316         return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
3317                         hba->hba_id, hba->backend->ops->name,
3318                         TARGET_CORE_VERSION);
3319 }
3320
3321 static ssize_t target_hba_mode_show(struct config_item *item, char *page)
3322 {
3323         struct se_hba *hba = to_hba(item);
3324         int hba_mode = 0;
3325
3326         if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
3327                 hba_mode = 1;
3328
3329         return sprintf(page, "%d\n", hba_mode);
3330 }
3331
3332 static ssize_t target_hba_mode_store(struct config_item *item,
3333                 const char *page, size_t count)
3334 {
3335         struct se_hba *hba = to_hba(item);
3336         unsigned long mode_flag;
3337         int ret;
3338
3339         if (hba->backend->ops->pmode_enable_hba == NULL)
3340                 return -EINVAL;
3341
3342         ret = kstrtoul(page, 0, &mode_flag);
3343         if (ret < 0) {
3344                 pr_err("Unable to extract hba mode flag: %d\n", ret);
3345                 return ret;
3346         }
3347
3348         if (hba->dev_count) {
3349                 pr_err("Unable to set hba_mode with active devices\n");
3350                 return -EINVAL;
3351         }
3352
3353         ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
3354         if (ret < 0)
3355                 return -EINVAL;
3356         if (ret > 0)
3357                 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3358         else if (ret == 0)
3359                 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3360
3361         return count;
3362 }
3363
3364 CONFIGFS_ATTR_RO(target_, hba_info);
3365 CONFIGFS_ATTR(target_, hba_mode);
3366
3367 static void target_core_hba_release(struct config_item *item)
3368 {
3369         struct se_hba *hba = container_of(to_config_group(item),
3370                                 struct se_hba, hba_group);
3371         core_delete_hba(hba);
3372 }
3373
3374 static struct configfs_attribute *target_core_hba_attrs[] = {
3375         &target_attr_hba_info,
3376         &target_attr_hba_mode,
3377         NULL,
3378 };
3379
3380 static struct configfs_item_operations target_core_hba_item_ops = {
3381         .release                = target_core_hba_release,
3382 };
3383
3384 static const struct config_item_type target_core_hba_cit = {
3385         .ct_item_ops            = &target_core_hba_item_ops,
3386         .ct_group_ops           = &target_core_hba_group_ops,
3387         .ct_attrs               = target_core_hba_attrs,
3388         .ct_owner               = THIS_MODULE,
3389 };
3390
3391 static struct config_group *target_core_call_addhbatotarget(
3392         struct config_group *group,
3393         const char *name)
3394 {
3395         char *se_plugin_str, *str, *str2;
3396         struct se_hba *hba;
3397         char buf[TARGET_CORE_NAME_MAX_LEN] = { };
3398         unsigned long plugin_dep_id = 0;
3399         int ret;
3400
3401         if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3402                 pr_err("Passed *name strlen(): %d exceeds"
3403                         " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3404                         TARGET_CORE_NAME_MAX_LEN);
3405                 return ERR_PTR(-ENAMETOOLONG);
3406         }
3407         snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3408
3409         str = strstr(buf, "_");
3410         if (!str) {
3411                 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3412                 return ERR_PTR(-EINVAL);
3413         }
3414         se_plugin_str = buf;
3415         /*
3416          * Special case for subsystem plugins that have "_" in their names.
3417          * Namely rd_direct and rd_mcp..
3418          */
3419         str2 = strstr(str+1, "_");
3420         if (str2) {
3421                 *str2 = '\0'; /* Terminate for *se_plugin_str */
3422                 str2++; /* Skip to start of plugin dependent ID */
3423                 str = str2;
3424         } else {
3425                 *str = '\0'; /* Terminate for *se_plugin_str */
3426                 str++; /* Skip to start of plugin dependent ID */
3427         }
3428
3429         ret = kstrtoul(str, 0, &plugin_dep_id);
3430         if (ret < 0) {
3431                 pr_err("kstrtoul() returned %d for"
3432                                 " plugin_dep_id\n", ret);
3433                 return ERR_PTR(ret);
3434         }
3435         /*
3436          * Load up TCM subsystem plugins if they have not already been loaded.
3437          */
3438         transport_subsystem_check_init();
3439
3440         hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3441         if (IS_ERR(hba))
3442                 return ERR_CAST(hba);
3443
3444         config_group_init_type_name(&hba->hba_group, name,
3445                         &target_core_hba_cit);
3446
3447         return &hba->hba_group;
3448 }
3449
3450 static void target_core_call_delhbafromtarget(
3451         struct config_group *group,
3452         struct config_item *item)
3453 {
3454         /*
3455          * core_delete_hba() is called from target_core_hba_item_ops->release()
3456          * -> target_core_hba_release()
3457          */
3458         config_item_put(item);
3459 }
3460
3461 static struct configfs_group_operations target_core_group_ops = {
3462         .make_group     = target_core_call_addhbatotarget,
3463         .drop_item      = target_core_call_delhbafromtarget,
3464 };
3465
3466 static const struct config_item_type target_core_cit = {
3467         .ct_item_ops    = NULL,
3468         .ct_group_ops   = &target_core_group_ops,
3469         .ct_attrs       = NULL,
3470         .ct_owner       = THIS_MODULE,
3471 };
3472
3473 /* Stop functions for struct config_item_type target_core_hba_cit */
3474
3475 void target_setup_backend_cits(struct target_backend *tb)
3476 {
3477         target_core_setup_dev_cit(tb);
3478         target_core_setup_dev_action_cit(tb);
3479         target_core_setup_dev_attrib_cit(tb);
3480         target_core_setup_dev_pr_cit(tb);
3481         target_core_setup_dev_wwn_cit(tb);
3482         target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3483         target_core_setup_dev_stat_cit(tb);
3484 }
3485
3486 static void target_init_dbroot(void)
3487 {
3488         struct file *fp;
3489
3490         snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED);
3491         fp = filp_open(db_root_stage, O_RDONLY, 0);
3492         if (IS_ERR(fp)) {
3493                 pr_err("db_root: cannot open: %s\n", db_root_stage);
3494                 return;
3495         }
3496         if (!S_ISDIR(file_inode(fp)->i_mode)) {
3497                 filp_close(fp, NULL);
3498                 pr_err("db_root: not a valid directory: %s\n", db_root_stage);
3499                 return;
3500         }
3501         filp_close(fp, NULL);
3502
3503         strncpy(db_root, db_root_stage, DB_ROOT_LEN);
3504         pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
3505 }
3506
3507 static int __init target_core_init_configfs(void)
3508 {
3509         struct configfs_subsystem *subsys = &target_core_fabrics;
3510         struct t10_alua_lu_gp *lu_gp;
3511         int ret;
3512
3513         pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3514                 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3515                 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3516
3517         config_group_init(&subsys->su_group);
3518         mutex_init(&subsys->su_mutex);
3519
3520         ret = init_se_kmem_caches();
3521         if (ret < 0)
3522                 return ret;
3523         /*
3524          * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3525          * and ALUA Logical Unit Group and Target Port Group infrastructure.
3526          */
3527         config_group_init_type_name(&target_core_hbagroup, "core",
3528                         &target_core_cit);
3529         configfs_add_default_group(&target_core_hbagroup, &subsys->su_group);
3530
3531         /*
3532          * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3533          */
3534         config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit);
3535         configfs_add_default_group(&alua_group, &target_core_hbagroup);
3536
3537         /*
3538          * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3539          * groups under /sys/kernel/config/target/core/alua/
3540          */
3541         config_group_init_type_name(&alua_lu_gps_group, "lu_gps",
3542                         &target_core_alua_lu_gps_cit);
3543         configfs_add_default_group(&alua_lu_gps_group, &alua_group);
3544
3545         /*
3546          * Add core/alua/lu_gps/default_lu_gp
3547          */
3548         lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3549         if (IS_ERR(lu_gp)) {
3550                 ret = -ENOMEM;
3551                 goto out_global;
3552         }
3553
3554         config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3555                                 &target_core_alua_lu_gp_cit);
3556         configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group);
3557
3558         default_lu_gp = lu_gp;
3559
3560         /*
3561          * Register the target_core_mod subsystem with configfs.
3562          */
3563         ret = configfs_register_subsystem(subsys);
3564         if (ret < 0) {
3565                 pr_err("Error %d while registering subsystem %s\n",
3566                         ret, subsys->su_group.cg_item.ci_namebuf);
3567                 goto out_global;
3568         }
3569         pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3570                 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
3571                 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3572         /*
3573          * Register built-in RAMDISK subsystem logic for virtual LUN 0
3574          */
3575         ret = rd_module_init();
3576         if (ret < 0)
3577                 goto out;
3578
3579         ret = core_dev_setup_virtual_lun0();
3580         if (ret < 0)
3581                 goto out;
3582
3583         ret = target_xcopy_setup_pt();
3584         if (ret < 0)
3585                 goto out;
3586
3587         target_init_dbroot();
3588
3589         return 0;
3590
3591 out:
3592         configfs_unregister_subsystem(subsys);
3593         core_dev_release_virtual_lun0();
3594         rd_module_exit();
3595 out_global:
3596         if (default_lu_gp) {
3597                 core_alua_free_lu_gp(default_lu_gp);
3598                 default_lu_gp = NULL;
3599         }
3600         release_se_kmem_caches();
3601         return ret;
3602 }
3603
3604 static void __exit target_core_exit_configfs(void)
3605 {
3606         configfs_remove_default_groups(&alua_lu_gps_group);
3607         configfs_remove_default_groups(&alua_group);
3608         configfs_remove_default_groups(&target_core_hbagroup);
3609
3610         /*
3611          * We expect subsys->su_group.default_groups to be released
3612          * by configfs subsystem provider logic..
3613          */
3614         configfs_unregister_subsystem(&target_core_fabrics);
3615
3616         core_alua_free_lu_gp(default_lu_gp);
3617         default_lu_gp = NULL;
3618
3619         pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3620                         " Infrastructure\n");
3621
3622         core_dev_release_virtual_lun0();
3623         rd_module_exit();
3624         target_xcopy_release_pt();
3625         release_se_kmem_caches();
3626 }
3627
3628 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3629 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3630 MODULE_LICENSE("GPL");
3631
3632 module_init(target_core_init_configfs);
3633 module_exit(target_core_exit_configfs);