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->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 pgr_support_show(struct config_item *item, char *page)
1109 {
1110         struct se_dev_attrib *da = to_attrib(item);
1111         u8 flags = da->da_dev->transport->transport_flags;
1112
1113         return snprintf(page, PAGE_SIZE, "%d\n",
1114                         flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1);
1115 }
1116
1117 CONFIGFS_ATTR(, emulate_model_alias);
1118 CONFIGFS_ATTR(, emulate_dpo);
1119 CONFIGFS_ATTR(, emulate_fua_write);
1120 CONFIGFS_ATTR(, emulate_fua_read);
1121 CONFIGFS_ATTR(, emulate_write_cache);
1122 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl);
1123 CONFIGFS_ATTR(, emulate_tas);
1124 CONFIGFS_ATTR(, emulate_tpu);
1125 CONFIGFS_ATTR(, emulate_tpws);
1126 CONFIGFS_ATTR(, emulate_caw);
1127 CONFIGFS_ATTR(, emulate_3pc);
1128 CONFIGFS_ATTR(, emulate_pr);
1129 CONFIGFS_ATTR(, pi_prot_type);
1130 CONFIGFS_ATTR_RO(, hw_pi_prot_type);
1131 CONFIGFS_ATTR(, pi_prot_format);
1132 CONFIGFS_ATTR(, pi_prot_verify);
1133 CONFIGFS_ATTR(, enforce_pr_isids);
1134 CONFIGFS_ATTR(, is_nonrot);
1135 CONFIGFS_ATTR(, emulate_rest_reord);
1136 CONFIGFS_ATTR(, force_pr_aptpl);
1137 CONFIGFS_ATTR_RO(, hw_block_size);
1138 CONFIGFS_ATTR(, block_size);
1139 CONFIGFS_ATTR_RO(, hw_max_sectors);
1140 CONFIGFS_ATTR(, optimal_sectors);
1141 CONFIGFS_ATTR_RO(, hw_queue_depth);
1142 CONFIGFS_ATTR(, queue_depth);
1143 CONFIGFS_ATTR(, max_unmap_lba_count);
1144 CONFIGFS_ATTR(, max_unmap_block_desc_count);
1145 CONFIGFS_ATTR(, unmap_granularity);
1146 CONFIGFS_ATTR(, unmap_granularity_alignment);
1147 CONFIGFS_ATTR(, unmap_zeroes_data);
1148 CONFIGFS_ATTR(, max_write_same_len);
1149 CONFIGFS_ATTR_RO(, alua_support);
1150 CONFIGFS_ATTR_RO(, pgr_support);
1151
1152 /*
1153  * dev_attrib attributes for devices using the target core SBC/SPC
1154  * interpreter.  Any backend using spc_parse_cdb should be using
1155  * these.
1156  */
1157 struct configfs_attribute *sbc_attrib_attrs[] = {
1158         &attr_emulate_model_alias,
1159         &attr_emulate_dpo,
1160         &attr_emulate_fua_write,
1161         &attr_emulate_fua_read,
1162         &attr_emulate_write_cache,
1163         &attr_emulate_ua_intlck_ctrl,
1164         &attr_emulate_tas,
1165         &attr_emulate_tpu,
1166         &attr_emulate_tpws,
1167         &attr_emulate_caw,
1168         &attr_emulate_3pc,
1169         &attr_emulate_pr,
1170         &attr_pi_prot_type,
1171         &attr_hw_pi_prot_type,
1172         &attr_pi_prot_format,
1173         &attr_pi_prot_verify,
1174         &attr_enforce_pr_isids,
1175         &attr_is_nonrot,
1176         &attr_emulate_rest_reord,
1177         &attr_force_pr_aptpl,
1178         &attr_hw_block_size,
1179         &attr_block_size,
1180         &attr_hw_max_sectors,
1181         &attr_optimal_sectors,
1182         &attr_hw_queue_depth,
1183         &attr_queue_depth,
1184         &attr_max_unmap_lba_count,
1185         &attr_max_unmap_block_desc_count,
1186         &attr_unmap_granularity,
1187         &attr_unmap_granularity_alignment,
1188         &attr_unmap_zeroes_data,
1189         &attr_max_write_same_len,
1190         &attr_alua_support,
1191         &attr_pgr_support,
1192         NULL,
1193 };
1194 EXPORT_SYMBOL(sbc_attrib_attrs);
1195
1196 /*
1197  * Minimal dev_attrib attributes for devices passing through CDBs.
1198  * In this case we only provide a few read-only attributes for
1199  * backwards compatibility.
1200  */
1201 struct configfs_attribute *passthrough_attrib_attrs[] = {
1202         &attr_hw_pi_prot_type,
1203         &attr_hw_block_size,
1204         &attr_hw_max_sectors,
1205         &attr_hw_queue_depth,
1206         &attr_alua_support,
1207         &attr_pgr_support,
1208         NULL,
1209 };
1210 EXPORT_SYMBOL(passthrough_attrib_attrs);
1211
1212 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL);
1213 TB_CIT_SETUP_DRV(dev_action, NULL, NULL);
1214
1215 /* End functions for struct config_item_type tb_dev_attrib_cit */
1216
1217 /*  Start functions for struct config_item_type tb_dev_wwn_cit */
1218
1219 static struct t10_wwn *to_t10_wwn(struct config_item *item)
1220 {
1221         return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group);
1222 }
1223
1224 static ssize_t target_check_inquiry_data(char *buf)
1225 {
1226         size_t len;
1227         int i;
1228
1229         len = strlen(buf);
1230
1231         /*
1232          * SPC 4.3.1:
1233          * ASCII data fields shall contain only ASCII printable characters
1234          * (i.e., code values 20h to 7Eh) and may be terminated with one or
1235          * more ASCII null (00h) characters.
1236          */
1237         for (i = 0; i < len; i++) {
1238                 if (buf[i] < 0x20 || buf[i] > 0x7E) {
1239                         pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n");
1240                         return -EINVAL;
1241                 }
1242         }
1243
1244         return len;
1245 }
1246
1247 /*
1248  * STANDARD and VPD page 0x83 T10 Vendor Identification
1249  */
1250 static ssize_t target_wwn_vendor_id_show(struct config_item *item,
1251                 char *page)
1252 {
1253         return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]);
1254 }
1255
1256 static ssize_t target_wwn_vendor_id_store(struct config_item *item,
1257                 const char *page, size_t count)
1258 {
1259         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1260         struct se_device *dev = t10_wwn->t10_dev;
1261         /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1262         unsigned char buf[INQUIRY_VENDOR_LEN + 2];
1263         char *stripped = NULL;
1264         size_t len;
1265         ssize_t ret;
1266
1267         len = strlcpy(buf, page, sizeof(buf));
1268         if (len < sizeof(buf)) {
1269                 /* Strip any newline added from userspace. */
1270                 stripped = strstrip(buf);
1271                 len = strlen(stripped);
1272         }
1273         if (len > INQUIRY_VENDOR_LEN) {
1274                 pr_err("Emulated T10 Vendor Identification exceeds"
1275                         " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN)
1276                         "\n");
1277                 return -EOVERFLOW;
1278         }
1279
1280         ret = target_check_inquiry_data(stripped);
1281
1282         if (ret < 0)
1283                 return ret;
1284
1285         /*
1286          * Check to see if any active exports exist.  If they do exist, fail
1287          * here as changing this information on the fly (underneath the
1288          * initiator side OS dependent multipath code) could cause negative
1289          * effects.
1290          */
1291         if (dev->export_count) {
1292                 pr_err("Unable to set T10 Vendor Identification while"
1293                         " active %d exports exist\n", dev->export_count);
1294                 return -EINVAL;
1295         }
1296
1297         BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1);
1298         strlcpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor));
1299
1300         pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:"
1301                  " %s\n", dev->t10_wwn.vendor);
1302
1303         return count;
1304 }
1305
1306 static ssize_t target_wwn_product_id_show(struct config_item *item,
1307                 char *page)
1308 {
1309         return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]);
1310 }
1311
1312 static ssize_t target_wwn_product_id_store(struct config_item *item,
1313                 const char *page, size_t count)
1314 {
1315         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1316         struct se_device *dev = t10_wwn->t10_dev;
1317         /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1318         unsigned char buf[INQUIRY_MODEL_LEN + 2];
1319         char *stripped = NULL;
1320         size_t len;
1321         ssize_t ret;
1322
1323         len = strlcpy(buf, page, sizeof(buf));
1324         if (len < sizeof(buf)) {
1325                 /* Strip any newline added from userspace. */
1326                 stripped = strstrip(buf);
1327                 len = strlen(stripped);
1328         }
1329         if (len > INQUIRY_MODEL_LEN) {
1330                 pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: "
1331                          __stringify(INQUIRY_MODEL_LEN)
1332                         "\n");
1333                 return -EOVERFLOW;
1334         }
1335
1336         ret = target_check_inquiry_data(stripped);
1337
1338         if (ret < 0)
1339                 return ret;
1340
1341         /*
1342          * Check to see if any active exports exist.  If they do exist, fail
1343          * here as changing this information on the fly (underneath the
1344          * initiator side OS dependent multipath code) could cause negative
1345          * effects.
1346          */
1347         if (dev->export_count) {
1348                 pr_err("Unable to set T10 Model while active %d exports exist\n",
1349                         dev->export_count);
1350                 return -EINVAL;
1351         }
1352
1353         BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
1354         strlcpy(dev->t10_wwn.model, stripped, sizeof(dev->t10_wwn.model));
1355
1356         pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n",
1357                  dev->t10_wwn.model);
1358
1359         return count;
1360 }
1361
1362 static ssize_t target_wwn_revision_show(struct config_item *item,
1363                 char *page)
1364 {
1365         return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]);
1366 }
1367
1368 static ssize_t target_wwn_revision_store(struct config_item *item,
1369                 const char *page, size_t count)
1370 {
1371         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1372         struct se_device *dev = t10_wwn->t10_dev;
1373         /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1374         unsigned char buf[INQUIRY_REVISION_LEN + 2];
1375         char *stripped = NULL;
1376         size_t len;
1377         ssize_t ret;
1378
1379         len = strlcpy(buf, page, sizeof(buf));
1380         if (len < sizeof(buf)) {
1381                 /* Strip any newline added from userspace. */
1382                 stripped = strstrip(buf);
1383                 len = strlen(stripped);
1384         }
1385         if (len > INQUIRY_REVISION_LEN) {
1386                 pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: "
1387                          __stringify(INQUIRY_REVISION_LEN)
1388                         "\n");
1389                 return -EOVERFLOW;
1390         }
1391
1392         ret = target_check_inquiry_data(stripped);
1393
1394         if (ret < 0)
1395                 return ret;
1396
1397         /*
1398          * Check to see if any active exports exist.  If they do exist, fail
1399          * here as changing this information on the fly (underneath the
1400          * initiator side OS dependent multipath code) could cause negative
1401          * effects.
1402          */
1403         if (dev->export_count) {
1404                 pr_err("Unable to set T10 Revision while active %d exports exist\n",
1405                         dev->export_count);
1406                 return -EINVAL;
1407         }
1408
1409         BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1);
1410         strlcpy(dev->t10_wwn.revision, stripped, sizeof(dev->t10_wwn.revision));
1411
1412         pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n",
1413                  dev->t10_wwn.revision);
1414
1415         return count;
1416 }
1417
1418 /*
1419  * VPD page 0x80 Unit serial
1420  */
1421 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item,
1422                 char *page)
1423 {
1424         return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1425                 &to_t10_wwn(item)->unit_serial[0]);
1426 }
1427
1428 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item,
1429                 const char *page, size_t count)
1430 {
1431         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1432         struct se_device *dev = t10_wwn->t10_dev;
1433         unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
1434
1435         /*
1436          * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1437          * from the struct scsi_device level firmware, do not allow
1438          * VPD Unit Serial to be emulated.
1439          *
1440          * Note this struct scsi_device could also be emulating VPD
1441          * information from its drivers/scsi LLD.  But for now we assume
1442          * it is doing 'the right thing' wrt a world wide unique
1443          * VPD Unit Serial Number that OS dependent multipath can depend on.
1444          */
1445         if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
1446                 pr_err("Underlying SCSI device firmware provided VPD"
1447                         " Unit Serial, ignoring request\n");
1448                 return -EOPNOTSUPP;
1449         }
1450
1451         if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
1452                 pr_err("Emulated VPD Unit Serial exceeds"
1453                 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1454                 return -EOVERFLOW;
1455         }
1456         /*
1457          * Check to see if any active $FABRIC_MOD exports exist.  If they
1458          * do exist, fail here as changing this information on the fly
1459          * (underneath the initiator side OS dependent multipath code)
1460          * could cause negative effects.
1461          */
1462         if (dev->export_count) {
1463                 pr_err("Unable to set VPD Unit Serial while"
1464                         " active %d $FABRIC_MOD exports exist\n",
1465                         dev->export_count);
1466                 return -EINVAL;
1467         }
1468
1469         /*
1470          * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1471          *
1472          * Also, strip any newline added from the userspace
1473          * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1474          */
1475         memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
1476         snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
1477         snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
1478                         "%s", strstrip(buf));
1479         dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
1480
1481         pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1482                         " %s\n", dev->t10_wwn.unit_serial);
1483
1484         return count;
1485 }
1486
1487 /*
1488  * VPD page 0x83 Protocol Identifier
1489  */
1490 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item,
1491                 char *page)
1492 {
1493         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1494         struct t10_vpd *vpd;
1495         unsigned char buf[VPD_TMP_BUF_SIZE];
1496         ssize_t len = 0;
1497
1498         memset(buf, 0, VPD_TMP_BUF_SIZE);
1499
1500         spin_lock(&t10_wwn->t10_vpd_lock);
1501         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
1502                 if (!vpd->protocol_identifier_set)
1503                         continue;
1504
1505                 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1506
1507                 if (len + strlen(buf) >= PAGE_SIZE)
1508                         break;
1509
1510                 len += sprintf(page+len, "%s", buf);
1511         }
1512         spin_unlock(&t10_wwn->t10_vpd_lock);
1513
1514         return len;
1515 }
1516
1517 /*
1518  * Generic wrapper for dumping VPD identifiers by association.
1519  */
1520 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc)                           \
1521 static ssize_t target_wwn_##_name##_show(struct config_item *item,      \
1522                 char *page)                                             \
1523 {                                                                       \
1524         struct t10_wwn *t10_wwn = to_t10_wwn(item);                     \
1525         struct t10_vpd *vpd;                                            \
1526         unsigned char buf[VPD_TMP_BUF_SIZE];                            \
1527         ssize_t len = 0;                                                \
1528                                                                         \
1529         spin_lock(&t10_wwn->t10_vpd_lock);                              \
1530         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {    \
1531                 if (vpd->association != _assoc)                         \
1532                         continue;                                       \
1533                                                                         \
1534                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
1535                 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE);   \
1536                 if (len + strlen(buf) >= PAGE_SIZE)                     \
1537                         break;                                          \
1538                 len += sprintf(page+len, "%s", buf);                    \
1539                                                                         \
1540                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
1541                 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1542                 if (len + strlen(buf) >= PAGE_SIZE)                     \
1543                         break;                                          \
1544                 len += sprintf(page+len, "%s", buf);                    \
1545                                                                         \
1546                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
1547                 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1548                 if (len + strlen(buf) >= PAGE_SIZE)                     \
1549                         break;                                          \
1550                 len += sprintf(page+len, "%s", buf);                    \
1551         }                                                               \
1552         spin_unlock(&t10_wwn->t10_vpd_lock);                            \
1553                                                                         \
1554         return len;                                                     \
1555 }
1556
1557 /* VPD page 0x83 Association: Logical Unit */
1558 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1559 /* VPD page 0x83 Association: Target Port */
1560 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1561 /* VPD page 0x83 Association: SCSI Target Device */
1562 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1563
1564 CONFIGFS_ATTR(target_wwn_, vendor_id);
1565 CONFIGFS_ATTR(target_wwn_, product_id);
1566 CONFIGFS_ATTR(target_wwn_, revision);
1567 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial);
1568 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier);
1569 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit);
1570 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port);
1571 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device);
1572
1573 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1574         &target_wwn_attr_vendor_id,
1575         &target_wwn_attr_product_id,
1576         &target_wwn_attr_revision,
1577         &target_wwn_attr_vpd_unit_serial,
1578         &target_wwn_attr_vpd_protocol_identifier,
1579         &target_wwn_attr_vpd_assoc_logical_unit,
1580         &target_wwn_attr_vpd_assoc_target_port,
1581         &target_wwn_attr_vpd_assoc_scsi_target_device,
1582         NULL,
1583 };
1584
1585 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs);
1586
1587 /*  End functions for struct config_item_type tb_dev_wwn_cit */
1588
1589 /*  Start functions for struct config_item_type tb_dev_pr_cit */
1590
1591 static struct se_device *pr_to_dev(struct config_item *item)
1592 {
1593         return container_of(to_config_group(item), struct se_device,
1594                         dev_pr_group);
1595 }
1596
1597 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1598                 char *page)
1599 {
1600         struct se_node_acl *se_nacl;
1601         struct t10_pr_registration *pr_reg;
1602         char i_buf[PR_REG_ISID_ID_LEN];
1603
1604         memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1605
1606         pr_reg = dev->dev_pr_res_holder;
1607         if (!pr_reg)
1608                 return sprintf(page, "No SPC-3 Reservation holder\n");
1609
1610         se_nacl = pr_reg->pr_reg_nacl;
1611         core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1612
1613         return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1614                 se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1615                 se_nacl->initiatorname, i_buf);
1616 }
1617
1618 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1619                 char *page)
1620 {
1621         struct se_session *sess = dev->reservation_holder;
1622         struct se_node_acl *se_nacl;
1623         ssize_t len;
1624
1625         if (sess) {
1626                 se_nacl = sess->se_node_acl;
1627                 len = sprintf(page,
1628                               "SPC-2 Reservation: %s Initiator: %s\n",
1629                               se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1630                               se_nacl->initiatorname);
1631         } else {
1632                 len = sprintf(page, "No SPC-2 Reservation holder\n");
1633         }
1634         return len;
1635 }
1636
1637 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page)
1638 {
1639         struct se_device *dev = pr_to_dev(item);
1640         int ret;
1641
1642         if (!dev->dev_attrib.emulate_pr)
1643                 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1644
1645         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1646                 return sprintf(page, "Passthrough\n");
1647
1648         spin_lock(&dev->dev_reservation_lock);
1649         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1650                 ret = target_core_dev_pr_show_spc2_res(dev, page);
1651         else
1652                 ret = target_core_dev_pr_show_spc3_res(dev, page);
1653         spin_unlock(&dev->dev_reservation_lock);
1654         return ret;
1655 }
1656
1657 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item,
1658                 char *page)
1659 {
1660         struct se_device *dev = pr_to_dev(item);
1661         ssize_t len = 0;
1662
1663         spin_lock(&dev->dev_reservation_lock);
1664         if (!dev->dev_pr_res_holder) {
1665                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1666         } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1667                 len = sprintf(page, "SPC-3 Reservation: All Target"
1668                         " Ports registration\n");
1669         } else {
1670                 len = sprintf(page, "SPC-3 Reservation: Single"
1671                         " Target Port registration\n");
1672         }
1673
1674         spin_unlock(&dev->dev_reservation_lock);
1675         return len;
1676 }
1677
1678 static ssize_t target_pr_res_pr_generation_show(struct config_item *item,
1679                 char *page)
1680 {
1681         return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation);
1682 }
1683
1684
1685 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item,
1686                 char *page)
1687 {
1688         struct se_device *dev = pr_to_dev(item);
1689         struct se_node_acl *se_nacl;
1690         struct se_portal_group *se_tpg;
1691         struct t10_pr_registration *pr_reg;
1692         const struct target_core_fabric_ops *tfo;
1693         ssize_t len = 0;
1694
1695         spin_lock(&dev->dev_reservation_lock);
1696         pr_reg = dev->dev_pr_res_holder;
1697         if (!pr_reg) {
1698                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1699                 goto out_unlock;
1700         }
1701
1702         se_nacl = pr_reg->pr_reg_nacl;
1703         se_tpg = se_nacl->se_tpg;
1704         tfo = se_tpg->se_tpg_tfo;
1705
1706         len += sprintf(page+len, "SPC-3 Reservation: %s"
1707                 " Target Node Endpoint: %s\n", tfo->fabric_name,
1708                 tfo->tpg_get_wwn(se_tpg));
1709         len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1710                 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1711                 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
1712                 tfo->fabric_name, tfo->tpg_get_tag(se_tpg),
1713                 tfo->fabric_name, pr_reg->pr_aptpl_target_lun);
1714
1715 out_unlock:
1716         spin_unlock(&dev->dev_reservation_lock);
1717         return len;
1718 }
1719
1720
1721 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item,
1722                 char *page)
1723 {
1724         struct se_device *dev = pr_to_dev(item);
1725         const struct target_core_fabric_ops *tfo;
1726         struct t10_pr_registration *pr_reg;
1727         unsigned char buf[384];
1728         char i_buf[PR_REG_ISID_ID_LEN];
1729         ssize_t len = 0;
1730         int reg_count = 0;
1731
1732         len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1733
1734         spin_lock(&dev->t10_pr.registration_lock);
1735         list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1736                         pr_reg_list) {
1737
1738                 memset(buf, 0, 384);
1739                 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1740                 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1741                 core_pr_dump_initiator_port(pr_reg, i_buf,
1742                                         PR_REG_ISID_ID_LEN);
1743                 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1744                         tfo->fabric_name,
1745                         pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1746                         pr_reg->pr_res_generation);
1747
1748                 if (len + strlen(buf) >= PAGE_SIZE)
1749                         break;
1750
1751                 len += sprintf(page+len, "%s", buf);
1752                 reg_count++;
1753         }
1754         spin_unlock(&dev->t10_pr.registration_lock);
1755
1756         if (!reg_count)
1757                 len += sprintf(page+len, "None\n");
1758
1759         return len;
1760 }
1761
1762 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page)
1763 {
1764         struct se_device *dev = pr_to_dev(item);
1765         struct t10_pr_registration *pr_reg;
1766         ssize_t len = 0;
1767
1768         spin_lock(&dev->dev_reservation_lock);
1769         pr_reg = dev->dev_pr_res_holder;
1770         if (pr_reg) {
1771                 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1772                         core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1773         } else {
1774                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1775         }
1776
1777         spin_unlock(&dev->dev_reservation_lock);
1778         return len;
1779 }
1780
1781 static ssize_t target_pr_res_type_show(struct config_item *item, char *page)
1782 {
1783         struct se_device *dev = pr_to_dev(item);
1784
1785         if (!dev->dev_attrib.emulate_pr)
1786                 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1787         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1788                 return sprintf(page, "SPC_PASSTHROUGH\n");
1789         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1790                 return sprintf(page, "SPC2_RESERVATIONS\n");
1791
1792         return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1793 }
1794
1795 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item,
1796                 char *page)
1797 {
1798         struct se_device *dev = pr_to_dev(item);
1799
1800         if (!dev->dev_attrib.emulate_pr ||
1801             (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1802                 return 0;
1803
1804         return sprintf(page, "APTPL Bit Status: %s\n",
1805                 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1806 }
1807
1808 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item,
1809                 char *page)
1810 {
1811         struct se_device *dev = pr_to_dev(item);
1812
1813         if (!dev->dev_attrib.emulate_pr ||
1814             (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1815                 return 0;
1816
1817         return sprintf(page, "Ready to process PR APTPL metadata..\n");
1818 }
1819
1820 enum {
1821         Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1822         Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1823         Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1824         Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1825 };
1826
1827 static match_table_t tokens = {
1828         {Opt_initiator_fabric, "initiator_fabric=%s"},
1829         {Opt_initiator_node, "initiator_node=%s"},
1830         {Opt_initiator_sid, "initiator_sid=%s"},
1831         {Opt_sa_res_key, "sa_res_key=%s"},
1832         {Opt_res_holder, "res_holder=%d"},
1833         {Opt_res_type, "res_type=%d"},
1834         {Opt_res_scope, "res_scope=%d"},
1835         {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1836         {Opt_mapped_lun, "mapped_lun=%u"},
1837         {Opt_target_fabric, "target_fabric=%s"},
1838         {Opt_target_node, "target_node=%s"},
1839         {Opt_tpgt, "tpgt=%d"},
1840         {Opt_port_rtpi, "port_rtpi=%d"},
1841         {Opt_target_lun, "target_lun=%u"},
1842         {Opt_err, NULL}
1843 };
1844
1845 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item,
1846                 const char *page, size_t count)
1847 {
1848         struct se_device *dev = pr_to_dev(item);
1849         unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1850         unsigned char *t_fabric = NULL, *t_port = NULL;
1851         char *orig, *ptr, *opts;
1852         substring_t args[MAX_OPT_ARGS];
1853         unsigned long long tmp_ll;
1854         u64 sa_res_key = 0;
1855         u64 mapped_lun = 0, target_lun = 0;
1856         int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1857         u16 tpgt = 0;
1858         u8 type = 0;
1859
1860         if (!dev->dev_attrib.emulate_pr ||
1861             (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1862                 return count;
1863         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1864                 return count;
1865
1866         if (dev->export_count) {
1867                 pr_debug("Unable to process APTPL metadata while"
1868                         " active fabric exports exist\n");
1869                 return -EINVAL;
1870         }
1871
1872         opts = kstrdup(page, GFP_KERNEL);
1873         if (!opts)
1874                 return -ENOMEM;
1875
1876         orig = opts;
1877         while ((ptr = strsep(&opts, ",\n")) != NULL) {
1878                 if (!*ptr)
1879                         continue;
1880
1881                 token = match_token(ptr, tokens, args);
1882                 switch (token) {
1883                 case Opt_initiator_fabric:
1884                         i_fabric = match_strdup(args);
1885                         if (!i_fabric) {
1886                                 ret = -ENOMEM;
1887                                 goto out;
1888                         }
1889                         break;
1890                 case Opt_initiator_node:
1891                         i_port = match_strdup(args);
1892                         if (!i_port) {
1893                                 ret = -ENOMEM;
1894                                 goto out;
1895                         }
1896                         if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1897                                 pr_err("APTPL metadata initiator_node="
1898                                         " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1899                                         PR_APTPL_MAX_IPORT_LEN);
1900                                 ret = -EINVAL;
1901                                 break;
1902                         }
1903                         break;
1904                 case Opt_initiator_sid:
1905                         isid = match_strdup(args);
1906                         if (!isid) {
1907                                 ret = -ENOMEM;
1908                                 goto out;
1909                         }
1910                         if (strlen(isid) >= PR_REG_ISID_LEN) {
1911                                 pr_err("APTPL metadata initiator_isid"
1912                                         "= exceeds PR_REG_ISID_LEN: %d\n",
1913                                         PR_REG_ISID_LEN);
1914                                 ret = -EINVAL;
1915                                 break;
1916                         }
1917                         break;
1918                 case Opt_sa_res_key:
1919                         ret = match_u64(args,  &tmp_ll);
1920                         if (ret < 0) {
1921                                 pr_err("kstrtoull() failed for sa_res_key=\n");
1922                                 goto out;
1923                         }
1924                         sa_res_key = (u64)tmp_ll;
1925                         break;
1926                 /*
1927                  * PR APTPL Metadata for Reservation
1928                  */
1929                 case Opt_res_holder:
1930                         ret = match_int(args, &arg);
1931                         if (ret)
1932                                 goto out;
1933                         res_holder = arg;
1934                         break;
1935                 case Opt_res_type:
1936                         ret = match_int(args, &arg);
1937                         if (ret)
1938                                 goto out;
1939                         type = (u8)arg;
1940                         break;
1941                 case Opt_res_scope:
1942                         ret = match_int(args, &arg);
1943                         if (ret)
1944                                 goto out;
1945                         break;
1946                 case Opt_res_all_tg_pt:
1947                         ret = match_int(args, &arg);
1948                         if (ret)
1949                                 goto out;
1950                         all_tg_pt = (int)arg;
1951                         break;
1952                 case Opt_mapped_lun:
1953                         ret = match_u64(args, &tmp_ll);
1954                         if (ret)
1955                                 goto out;
1956                         mapped_lun = (u64)tmp_ll;
1957                         break;
1958                 /*
1959                  * PR APTPL Metadata for Target Port
1960                  */
1961                 case Opt_target_fabric:
1962                         t_fabric = match_strdup(args);
1963                         if (!t_fabric) {
1964                                 ret = -ENOMEM;
1965                                 goto out;
1966                         }
1967                         break;
1968                 case Opt_target_node:
1969                         t_port = match_strdup(args);
1970                         if (!t_port) {
1971                                 ret = -ENOMEM;
1972                                 goto out;
1973                         }
1974                         if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1975                                 pr_err("APTPL metadata target_node="
1976                                         " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1977                                         PR_APTPL_MAX_TPORT_LEN);
1978                                 ret = -EINVAL;
1979                                 break;
1980                         }
1981                         break;
1982                 case Opt_tpgt:
1983                         ret = match_int(args, &arg);
1984                         if (ret)
1985                                 goto out;
1986                         tpgt = (u16)arg;
1987                         break;
1988                 case Opt_port_rtpi:
1989                         ret = match_int(args, &arg);
1990                         if (ret)
1991                                 goto out;
1992                         break;
1993                 case Opt_target_lun:
1994                         ret = match_u64(args, &tmp_ll);
1995                         if (ret)
1996                                 goto out;
1997                         target_lun = (u64)tmp_ll;
1998                         break;
1999                 default:
2000                         break;
2001                 }
2002         }
2003
2004         if (!i_port || !t_port || !sa_res_key) {
2005                 pr_err("Illegal parameters for APTPL registration\n");
2006                 ret = -EINVAL;
2007                 goto out;
2008         }
2009
2010         if (res_holder && !(type)) {
2011                 pr_err("Illegal PR type: 0x%02x for reservation"
2012                                 " holder\n", type);
2013                 ret = -EINVAL;
2014                 goto out;
2015         }
2016
2017         ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
2018                         i_port, isid, mapped_lun, t_port, tpgt, target_lun,
2019                         res_holder, all_tg_pt, type);
2020 out:
2021         kfree(i_fabric);
2022         kfree(i_port);
2023         kfree(isid);
2024         kfree(t_fabric);
2025         kfree(t_port);
2026         kfree(orig);
2027         return (ret == 0) ? count : ret;
2028 }
2029
2030
2031 CONFIGFS_ATTR_RO(target_pr_, res_holder);
2032 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts);
2033 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation);
2034 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port);
2035 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts);
2036 CONFIGFS_ATTR_RO(target_pr_, res_pr_type);
2037 CONFIGFS_ATTR_RO(target_pr_, res_type);
2038 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active);
2039 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata);
2040
2041 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
2042         &target_pr_attr_res_holder,
2043         &target_pr_attr_res_pr_all_tgt_pts,
2044         &target_pr_attr_res_pr_generation,
2045         &target_pr_attr_res_pr_holder_tg_port,
2046         &target_pr_attr_res_pr_registered_i_pts,
2047         &target_pr_attr_res_pr_type,
2048         &target_pr_attr_res_type,
2049         &target_pr_attr_res_aptpl_active,
2050         &target_pr_attr_res_aptpl_metadata,
2051         NULL,
2052 };
2053
2054 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs);
2055
2056 /*  End functions for struct config_item_type tb_dev_pr_cit */
2057
2058 /*  Start functions for struct config_item_type tb_dev_cit */
2059
2060 static inline struct se_device *to_device(struct config_item *item)
2061 {
2062         return container_of(to_config_group(item), struct se_device, dev_group);
2063 }
2064
2065 static ssize_t target_dev_info_show(struct config_item *item, char *page)
2066 {
2067         struct se_device *dev = to_device(item);
2068         int bl = 0;
2069         ssize_t read_bytes = 0;
2070
2071         transport_dump_dev_state(dev, page, &bl);
2072         read_bytes += bl;
2073         read_bytes += dev->transport->show_configfs_dev_params(dev,
2074                         page+read_bytes);
2075         return read_bytes;
2076 }
2077
2078 static ssize_t target_dev_control_store(struct config_item *item,
2079                 const char *page, size_t count)
2080 {
2081         struct se_device *dev = to_device(item);
2082
2083         return dev->transport->set_configfs_dev_params(dev, page, count);
2084 }
2085
2086 static ssize_t target_dev_alias_show(struct config_item *item, char *page)
2087 {
2088         struct se_device *dev = to_device(item);
2089
2090         if (!(dev->dev_flags & DF_USING_ALIAS))
2091                 return 0;
2092
2093         return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
2094 }
2095
2096 static ssize_t target_dev_alias_store(struct config_item *item,
2097                 const char *page, size_t count)
2098 {
2099         struct se_device *dev = to_device(item);
2100         struct se_hba *hba = dev->se_hba;
2101         ssize_t read_bytes;
2102
2103         if (count > (SE_DEV_ALIAS_LEN-1)) {
2104                 pr_err("alias count: %d exceeds"
2105                         " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
2106                         SE_DEV_ALIAS_LEN-1);
2107                 return -EINVAL;
2108         }
2109
2110         read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
2111         if (!read_bytes)
2112                 return -EINVAL;
2113         if (dev->dev_alias[read_bytes - 1] == '\n')
2114                 dev->dev_alias[read_bytes - 1] = '\0';
2115
2116         dev->dev_flags |= DF_USING_ALIAS;
2117
2118         pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
2119                 config_item_name(&hba->hba_group.cg_item),
2120                 config_item_name(&dev->dev_group.cg_item),
2121                 dev->dev_alias);
2122
2123         return read_bytes;
2124 }
2125
2126 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page)
2127 {
2128         struct se_device *dev = to_device(item);
2129
2130         if (!(dev->dev_flags & DF_USING_UDEV_PATH))
2131                 return 0;
2132
2133         return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
2134 }
2135
2136 static ssize_t target_dev_udev_path_store(struct config_item *item,
2137                 const char *page, size_t count)
2138 {
2139         struct se_device *dev = to_device(item);
2140         struct se_hba *hba = dev->se_hba;
2141         ssize_t read_bytes;
2142
2143         if (count > (SE_UDEV_PATH_LEN-1)) {
2144                 pr_err("udev_path count: %d exceeds"
2145                         " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
2146                         SE_UDEV_PATH_LEN-1);
2147                 return -EINVAL;
2148         }
2149
2150         read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
2151                         "%s", page);
2152         if (!read_bytes)
2153                 return -EINVAL;
2154         if (dev->udev_path[read_bytes - 1] == '\n')
2155                 dev->udev_path[read_bytes - 1] = '\0';
2156
2157         dev->dev_flags |= DF_USING_UDEV_PATH;
2158
2159         pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
2160                 config_item_name(&hba->hba_group.cg_item),
2161                 config_item_name(&dev->dev_group.cg_item),
2162                 dev->udev_path);
2163
2164         return read_bytes;
2165 }
2166
2167 static ssize_t target_dev_enable_show(struct config_item *item, char *page)
2168 {
2169         struct se_device *dev = to_device(item);
2170
2171         return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev));
2172 }
2173
2174 static ssize_t target_dev_enable_store(struct config_item *item,
2175                 const char *page, size_t count)
2176 {
2177         struct se_device *dev = to_device(item);
2178         char *ptr;
2179         int ret;
2180
2181         ptr = strstr(page, "1");
2182         if (!ptr) {
2183                 pr_err("For dev_enable ops, only valid value"
2184                                 " is \"1\"\n");
2185                 return -EINVAL;
2186         }
2187
2188         ret = target_configure_device(dev);
2189         if (ret)
2190                 return ret;
2191         return count;
2192 }
2193
2194 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page)
2195 {
2196         struct se_device *dev = to_device(item);
2197         struct config_item *lu_ci;
2198         struct t10_alua_lu_gp *lu_gp;
2199         struct t10_alua_lu_gp_member *lu_gp_mem;
2200         ssize_t len = 0;
2201
2202         lu_gp_mem = dev->dev_alua_lu_gp_mem;
2203         if (!lu_gp_mem)
2204                 return 0;
2205
2206         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2207         lu_gp = lu_gp_mem->lu_gp;
2208         if (lu_gp) {
2209                 lu_ci = &lu_gp->lu_gp_group.cg_item;
2210                 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
2211                         config_item_name(lu_ci), lu_gp->lu_gp_id);
2212         }
2213         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2214
2215         return len;
2216 }
2217
2218 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item,
2219                 const char *page, size_t count)
2220 {
2221         struct se_device *dev = to_device(item);
2222         struct se_hba *hba = dev->se_hba;
2223         struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
2224         struct t10_alua_lu_gp_member *lu_gp_mem;
2225         unsigned char buf[LU_GROUP_NAME_BUF];
2226         int move = 0;
2227
2228         lu_gp_mem = dev->dev_alua_lu_gp_mem;
2229         if (!lu_gp_mem)
2230                 return count;
2231
2232         if (count > LU_GROUP_NAME_BUF) {
2233                 pr_err("ALUA LU Group Alias too large!\n");
2234                 return -EINVAL;
2235         }
2236         memset(buf, 0, LU_GROUP_NAME_BUF);
2237         memcpy(buf, page, count);
2238         /*
2239          * Any ALUA logical unit alias besides "NULL" means we will be
2240          * making a new group association.
2241          */
2242         if (strcmp(strstrip(buf), "NULL")) {
2243                 /*
2244                  * core_alua_get_lu_gp_by_name() will increment reference to
2245                  * struct t10_alua_lu_gp.  This reference is released with
2246                  * core_alua_get_lu_gp_by_name below().
2247                  */
2248                 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
2249                 if (!lu_gp_new)
2250                         return -ENODEV;
2251         }
2252
2253         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2254         lu_gp = lu_gp_mem->lu_gp;
2255         if (lu_gp) {
2256                 /*
2257                  * Clearing an existing lu_gp association, and replacing
2258                  * with NULL
2259                  */
2260                 if (!lu_gp_new) {
2261                         pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
2262                                 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
2263                                 " %hu\n",
2264                                 config_item_name(&hba->hba_group.cg_item),
2265                                 config_item_name(&dev->dev_group.cg_item),
2266                                 config_item_name(&lu_gp->lu_gp_group.cg_item),
2267                                 lu_gp->lu_gp_id);
2268
2269                         __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2270                         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2271
2272                         return count;
2273                 }
2274                 /*
2275                  * Removing existing association of lu_gp_mem with lu_gp
2276                  */
2277                 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2278                 move = 1;
2279         }
2280         /*
2281          * Associate lu_gp_mem with lu_gp_new.
2282          */
2283         __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
2284         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2285
2286         pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
2287                 " core/alua/lu_gps/%s, ID: %hu\n",
2288                 (move) ? "Moving" : "Adding",
2289                 config_item_name(&hba->hba_group.cg_item),
2290                 config_item_name(&dev->dev_group.cg_item),
2291                 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
2292                 lu_gp_new->lu_gp_id);
2293
2294         core_alua_put_lu_gp_from_name(lu_gp_new);
2295         return count;
2296 }
2297
2298 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page)
2299 {
2300         struct se_device *dev = to_device(item);
2301         struct t10_alua_lba_map *map;
2302         struct t10_alua_lba_map_member *mem;
2303         char *b = page;
2304         int bl = 0;
2305         char state;
2306
2307         spin_lock(&dev->t10_alua.lba_map_lock);
2308         if (!list_empty(&dev->t10_alua.lba_map_list))
2309             bl += sprintf(b + bl, "%u %u\n",
2310                           dev->t10_alua.lba_map_segment_size,
2311                           dev->t10_alua.lba_map_segment_multiplier);
2312         list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
2313                 bl += sprintf(b + bl, "%llu %llu",
2314                               map->lba_map_first_lba, map->lba_map_last_lba);
2315                 list_for_each_entry(mem, &map->lba_map_mem_list,
2316                                     lba_map_mem_list) {
2317                         switch (mem->lba_map_mem_alua_state) {
2318                         case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
2319                                 state = 'O';
2320                                 break;
2321                         case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
2322                                 state = 'A';
2323                                 break;
2324                         case ALUA_ACCESS_STATE_STANDBY:
2325                                 state = 'S';
2326                                 break;
2327                         case ALUA_ACCESS_STATE_UNAVAILABLE:
2328                                 state = 'U';
2329                                 break;
2330                         default:
2331                                 state = '.';
2332                                 break;
2333                         }
2334                         bl += sprintf(b + bl, " %d:%c",
2335                                       mem->lba_map_mem_alua_pg_id, state);
2336                 }
2337                 bl += sprintf(b + bl, "\n");
2338         }
2339         spin_unlock(&dev->t10_alua.lba_map_lock);
2340         return bl;
2341 }
2342
2343 static ssize_t target_dev_lba_map_store(struct config_item *item,
2344                 const char *page, size_t count)
2345 {
2346         struct se_device *dev = to_device(item);
2347         struct t10_alua_lba_map *lba_map = NULL;
2348         struct list_head lba_list;
2349         char *map_entries, *orig, *ptr;
2350         char state;
2351         int pg_num = -1, pg;
2352         int ret = 0, num = 0, pg_id, alua_state;
2353         unsigned long start_lba = -1, end_lba = -1;
2354         unsigned long segment_size = -1, segment_mult = -1;
2355
2356         orig = map_entries = kstrdup(page, GFP_KERNEL);
2357         if (!map_entries)
2358                 return -ENOMEM;
2359
2360         INIT_LIST_HEAD(&lba_list);
2361         while ((ptr = strsep(&map_entries, "\n")) != NULL) {
2362                 if (!*ptr)
2363                         continue;
2364
2365                 if (num == 0) {
2366                         if (sscanf(ptr, "%lu %lu\n",
2367                                    &segment_size, &segment_mult) != 2) {
2368                                 pr_err("Invalid line %d\n", num);
2369                                 ret = -EINVAL;
2370                                 break;
2371                         }
2372                         num++;
2373                         continue;
2374                 }
2375                 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2376                         pr_err("Invalid line %d\n", num);
2377                         ret = -EINVAL;
2378                         break;
2379                 }
2380                 ptr = strchr(ptr, ' ');
2381                 if (!ptr) {
2382                         pr_err("Invalid line %d, missing end lba\n", num);
2383                         ret = -EINVAL;
2384                         break;
2385                 }
2386                 ptr++;
2387                 ptr = strchr(ptr, ' ');
2388                 if (!ptr) {
2389                         pr_err("Invalid line %d, missing state definitions\n",
2390                                num);
2391                         ret = -EINVAL;
2392                         break;
2393                 }
2394                 ptr++;
2395                 lba_map = core_alua_allocate_lba_map(&lba_list,
2396                                                      start_lba, end_lba);
2397                 if (IS_ERR(lba_map)) {
2398                         ret = PTR_ERR(lba_map);
2399                         break;
2400                 }
2401                 pg = 0;
2402                 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2403                         switch (state) {
2404                         case 'O':
2405                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2406                                 break;
2407                         case 'A':
2408                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2409                                 break;
2410                         case 'S':
2411                                 alua_state = ALUA_ACCESS_STATE_STANDBY;
2412                                 break;
2413                         case 'U':
2414                                 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2415                                 break;
2416                         default:
2417                                 pr_err("Invalid ALUA state '%c'\n", state);
2418                                 ret = -EINVAL;
2419                                 goto out;
2420                         }
2421
2422                         ret = core_alua_allocate_lba_map_mem(lba_map,
2423                                                              pg_id, alua_state);
2424                         if (ret) {
2425                                 pr_err("Invalid target descriptor %d:%c "
2426                                        "at line %d\n",
2427                                        pg_id, state, num);
2428                                 break;
2429                         }
2430                         pg++;
2431                         ptr = strchr(ptr, ' ');
2432                         if (ptr)
2433                                 ptr++;
2434                         else
2435                                 break;
2436                 }
2437                 if (pg_num == -1)
2438                     pg_num = pg;
2439                 else if (pg != pg_num) {
2440                         pr_err("Only %d from %d port groups definitions "
2441                                "at line %d\n", pg, pg_num, num);
2442                         ret = -EINVAL;
2443                         break;
2444                 }
2445                 num++;
2446         }
2447 out:
2448         if (ret) {
2449                 core_alua_free_lba_map(&lba_list);
2450                 count = ret;
2451         } else
2452                 core_alua_set_lba_map(dev, &lba_list,
2453                                       segment_size, segment_mult);
2454         kfree(orig);
2455         return count;
2456 }
2457
2458 CONFIGFS_ATTR_RO(target_dev_, info);
2459 CONFIGFS_ATTR_WO(target_dev_, control);
2460 CONFIGFS_ATTR(target_dev_, alias);
2461 CONFIGFS_ATTR(target_dev_, udev_path);
2462 CONFIGFS_ATTR(target_dev_, enable);
2463 CONFIGFS_ATTR(target_dev_, alua_lu_gp);
2464 CONFIGFS_ATTR(target_dev_, lba_map);
2465
2466 static struct configfs_attribute *target_core_dev_attrs[] = {
2467         &target_dev_attr_info,
2468         &target_dev_attr_control,
2469         &target_dev_attr_alias,
2470         &target_dev_attr_udev_path,
2471         &target_dev_attr_enable,
2472         &target_dev_attr_alua_lu_gp,
2473         &target_dev_attr_lba_map,
2474         NULL,
2475 };
2476
2477 static void target_core_dev_release(struct config_item *item)
2478 {
2479         struct config_group *dev_cg = to_config_group(item);
2480         struct se_device *dev =
2481                 container_of(dev_cg, struct se_device, dev_group);
2482
2483         target_free_device(dev);
2484 }
2485
2486 /*
2487  * Used in target_core_fabric_configfs.c to verify valid se_device symlink
2488  * within target_fabric_port_link()
2489  */
2490 struct configfs_item_operations target_core_dev_item_ops = {
2491         .release                = target_core_dev_release,
2492 };
2493
2494 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2495
2496 /* End functions for struct config_item_type tb_dev_cit */
2497
2498 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2499
2500 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item)
2501 {
2502         return container_of(to_config_group(item), struct t10_alua_lu_gp,
2503                         lu_gp_group);
2504 }
2505
2506 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page)
2507 {
2508         struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2509
2510         if (!lu_gp->lu_gp_valid_id)
2511                 return 0;
2512         return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2513 }
2514
2515 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item,
2516                 const char *page, size_t count)
2517 {
2518         struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2519         struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2520         unsigned long lu_gp_id;
2521         int ret;
2522
2523         ret = kstrtoul(page, 0, &lu_gp_id);
2524         if (ret < 0) {
2525                 pr_err("kstrtoul() returned %d for"
2526                         " lu_gp_id\n", ret);
2527                 return ret;
2528         }
2529         if (lu_gp_id > 0x0000ffff) {
2530                 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2531                         " 0x0000ffff\n", lu_gp_id);
2532                 return -EINVAL;
2533         }
2534
2535         ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2536         if (ret < 0)
2537                 return -EINVAL;
2538
2539         pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2540                 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2541                 config_item_name(&alua_lu_gp_cg->cg_item),
2542                 lu_gp->lu_gp_id);
2543
2544         return count;
2545 }
2546
2547 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
2548 {
2549         struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2550         struct se_device *dev;
2551         struct se_hba *hba;
2552         struct t10_alua_lu_gp_member *lu_gp_mem;
2553         ssize_t len = 0, cur_len;
2554         unsigned char buf[LU_GROUP_NAME_BUF];
2555
2556         memset(buf, 0, LU_GROUP_NAME_BUF);
2557
2558         spin_lock(&lu_gp->lu_gp_lock);
2559         list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2560                 dev = lu_gp_mem->lu_gp_mem_dev;
2561                 hba = dev->se_hba;
2562
2563                 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2564                         config_item_name(&hba->hba_group.cg_item),
2565                         config_item_name(&dev->dev_group.cg_item));
2566                 cur_len++; /* Extra byte for NULL terminator */
2567
2568                 if ((cur_len + len) > PAGE_SIZE) {
2569                         pr_warn("Ran out of lu_gp_show_attr"
2570                                 "_members buffer\n");
2571                         break;
2572                 }
2573                 memcpy(page+len, buf, cur_len);
2574                 len += cur_len;
2575         }
2576         spin_unlock(&lu_gp->lu_gp_lock);
2577
2578         return len;
2579 }
2580
2581 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id);
2582 CONFIGFS_ATTR_RO(target_lu_gp_, members);
2583
2584 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2585         &target_lu_gp_attr_lu_gp_id,
2586         &target_lu_gp_attr_members,
2587         NULL,
2588 };
2589
2590 static void target_core_alua_lu_gp_release(struct config_item *item)
2591 {
2592         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2593                         struct t10_alua_lu_gp, lu_gp_group);
2594
2595         core_alua_free_lu_gp(lu_gp);
2596 }
2597
2598 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2599         .release                = target_core_alua_lu_gp_release,
2600 };
2601
2602 static const struct config_item_type target_core_alua_lu_gp_cit = {
2603         .ct_item_ops            = &target_core_alua_lu_gp_ops,
2604         .ct_attrs               = target_core_alua_lu_gp_attrs,
2605         .ct_owner               = THIS_MODULE,
2606 };
2607
2608 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2609
2610 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2611
2612 static struct config_group *target_core_alua_create_lu_gp(
2613         struct config_group *group,
2614         const char *name)
2615 {
2616         struct t10_alua_lu_gp *lu_gp;
2617         struct config_group *alua_lu_gp_cg = NULL;
2618         struct config_item *alua_lu_gp_ci = NULL;
2619
2620         lu_gp = core_alua_allocate_lu_gp(name, 0);
2621         if (IS_ERR(lu_gp))
2622                 return NULL;
2623
2624         alua_lu_gp_cg = &lu_gp->lu_gp_group;
2625         alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2626
2627         config_group_init_type_name(alua_lu_gp_cg, name,
2628                         &target_core_alua_lu_gp_cit);
2629
2630         pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2631                 " Group: core/alua/lu_gps/%s\n",
2632                 config_item_name(alua_lu_gp_ci));
2633
2634         return alua_lu_gp_cg;
2635
2636 }
2637
2638 static void target_core_alua_drop_lu_gp(
2639         struct config_group *group,
2640         struct config_item *item)
2641 {
2642         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2643                         struct t10_alua_lu_gp, lu_gp_group);
2644
2645         pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2646                 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2647                 config_item_name(item), lu_gp->lu_gp_id);
2648         /*
2649          * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2650          * -> target_core_alua_lu_gp_release()
2651          */
2652         config_item_put(item);
2653 }
2654
2655 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2656         .make_group             = &target_core_alua_create_lu_gp,
2657         .drop_item              = &target_core_alua_drop_lu_gp,
2658 };
2659
2660 static const struct config_item_type target_core_alua_lu_gps_cit = {
2661         .ct_item_ops            = NULL,
2662         .ct_group_ops           = &target_core_alua_lu_gps_group_ops,
2663         .ct_owner               = THIS_MODULE,
2664 };
2665
2666 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2667
2668 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2669
2670 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item)
2671 {
2672         return container_of(to_config_group(item), struct t10_alua_tg_pt_gp,
2673                         tg_pt_gp_group);
2674 }
2675
2676 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item,
2677                 char *page)
2678 {
2679         return sprintf(page, "%d\n",
2680                        to_tg_pt_gp(item)->tg_pt_gp_alua_access_state);
2681 }
2682
2683 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item,
2684                 const char *page, size_t count)
2685 {
2686         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2687         struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2688         unsigned long tmp;
2689         int new_state, ret;
2690
2691         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2692                 pr_err("Unable to do implicit ALUA on non valid"
2693                         " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2694                 return -EINVAL;
2695         }
2696         if (!target_dev_configured(dev)) {
2697                 pr_err("Unable to set alua_access_state while device is"
2698                        " not configured\n");
2699                 return -ENODEV;
2700         }
2701
2702         ret = kstrtoul(page, 0, &tmp);
2703         if (ret < 0) {
2704                 pr_err("Unable to extract new ALUA access state from"
2705                                 " %s\n", page);
2706                 return ret;
2707         }
2708         new_state = (int)tmp;
2709
2710         if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2711                 pr_err("Unable to process implicit configfs ALUA"
2712                         " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2713                 return -EINVAL;
2714         }
2715         if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2716             new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2717                 /* LBA DEPENDENT is only allowed with implicit ALUA */
2718                 pr_err("Unable to process implicit configfs ALUA transition"
2719                        " while explicit ALUA management is enabled\n");
2720                 return -EINVAL;
2721         }
2722
2723         ret = core_alua_do_port_transition(tg_pt_gp, dev,
2724                                         NULL, NULL, new_state, 0);
2725         return (!ret) ? count : -EINVAL;
2726 }
2727
2728 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item,
2729                 char *page)
2730 {
2731         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2732         return sprintf(page, "%s\n",
2733                 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2734 }
2735
2736 static ssize_t target_tg_pt_gp_alua_access_status_store(
2737                 struct config_item *item, const char *page, size_t count)
2738 {
2739         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2740         unsigned long tmp;
2741         int new_status, ret;
2742
2743         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2744                 pr_err("Unable to do set ALUA access status on non"
2745                         " valid tg_pt_gp ID: %hu\n",
2746                         tg_pt_gp->tg_pt_gp_valid_id);
2747                 return -EINVAL;
2748         }
2749
2750         ret = kstrtoul(page, 0, &tmp);
2751         if (ret < 0) {
2752                 pr_err("Unable to extract new ALUA access status"
2753                                 " from %s\n", page);
2754                 return ret;
2755         }
2756         new_status = (int)tmp;
2757
2758         if ((new_status != ALUA_STATUS_NONE) &&
2759             (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2760             (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2761                 pr_err("Illegal ALUA access status: 0x%02x\n",
2762                                 new_status);
2763                 return -EINVAL;
2764         }
2765
2766         tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2767         return count;
2768 }
2769
2770 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item,
2771                 char *page)
2772 {
2773         return core_alua_show_access_type(to_tg_pt_gp(item), page);
2774 }
2775
2776 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item,
2777                 const char *page, size_t count)
2778 {
2779         return core_alua_store_access_type(to_tg_pt_gp(item), page, count);
2780 }
2781
2782 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit)                          \
2783 static ssize_t target_tg_pt_gp_alua_support_##_name##_show(             \
2784                 struct config_item *item, char *p)                      \
2785 {                                                                       \
2786         struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item);                \
2787         return sprintf(p, "%d\n",                                       \
2788                 !!(t->tg_pt_gp_alua_supported_states & _bit));          \
2789 }                                                                       \
2790                                                                         \
2791 static ssize_t target_tg_pt_gp_alua_support_##_name##_store(            \
2792                 struct config_item *item, const char *p, size_t c)      \
2793 {                                                                       \
2794         struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item);                \
2795         unsigned long tmp;                                              \
2796         int ret;                                                        \
2797                                                                         \
2798         if (!t->tg_pt_gp_valid_id) {                                    \
2799                 pr_err("Unable to do set " #_name " ALUA state on non"  \
2800                        " valid tg_pt_gp ID: %hu\n",                     \
2801                        t->tg_pt_gp_valid_id);                           \
2802                 return -EINVAL;                                         \
2803         }                                                               \
2804                                                                         \
2805         ret = kstrtoul(p, 0, &tmp);                                     \
2806         if (ret < 0) {                                                  \
2807                 pr_err("Invalid value '%s', must be '0' or '1'\n", p);  \
2808                 return -EINVAL;                                         \
2809         }                                                               \
2810         if (tmp > 1) {                                                  \
2811                 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2812                 return -EINVAL;                                         \
2813         }                                                               \
2814         if (tmp)                                                        \
2815                 t->tg_pt_gp_alua_supported_states |= _bit;              \
2816         else                                                            \
2817                 t->tg_pt_gp_alua_supported_states &= ~_bit;             \
2818                                                                         \
2819         return c;                                                       \
2820 }
2821
2822 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP);
2823 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP);
2824 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP);
2825 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP);
2826 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP);
2827 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP);
2828 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP);
2829
2830 static ssize_t target_tg_pt_gp_alua_write_metadata_show(
2831                 struct config_item *item, char *page)
2832 {
2833         return sprintf(page, "%d\n",
2834                 to_tg_pt_gp(item)->tg_pt_gp_write_metadata);
2835 }
2836
2837 static ssize_t target_tg_pt_gp_alua_write_metadata_store(
2838                 struct config_item *item, const char *page, size_t count)
2839 {
2840         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2841         unsigned long tmp;
2842         int ret;
2843
2844         ret = kstrtoul(page, 0, &tmp);
2845         if (ret < 0) {
2846                 pr_err("Unable to extract alua_write_metadata\n");
2847                 return ret;
2848         }
2849
2850         if ((tmp != 0) && (tmp != 1)) {
2851                 pr_err("Illegal value for alua_write_metadata:"
2852                         " %lu\n", tmp);
2853                 return -EINVAL;
2854         }
2855         tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2856
2857         return count;
2858 }
2859
2860 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item,
2861                 char *page)
2862 {
2863         return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page);
2864 }
2865
2866 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item,
2867                 const char *page, size_t count)
2868 {
2869         return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page,
2870                         count);
2871 }
2872
2873 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item,
2874                 char *page)
2875 {
2876         return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page);
2877 }
2878
2879 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item,
2880                 const char *page, size_t count)
2881 {
2882         return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page,
2883                         count);
2884 }
2885
2886 static ssize_t target_tg_pt_gp_implicit_trans_secs_show(
2887                 struct config_item *item, char *page)
2888 {
2889         return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page);
2890 }
2891
2892 static ssize_t target_tg_pt_gp_implicit_trans_secs_store(
2893                 struct config_item *item, const char *page, size_t count)
2894 {
2895         return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page,
2896                         count);
2897 }
2898
2899 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item,
2900                 char *page)
2901 {
2902         return core_alua_show_preferred_bit(to_tg_pt_gp(item), page);
2903 }
2904
2905 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item,
2906                 const char *page, size_t count)
2907 {
2908         return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count);
2909 }
2910
2911 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item,
2912                 char *page)
2913 {
2914         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2915
2916         if (!tg_pt_gp->tg_pt_gp_valid_id)
2917                 return 0;
2918         return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2919 }
2920
2921 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item,
2922                 const char *page, size_t count)
2923 {
2924         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2925         struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2926         unsigned long tg_pt_gp_id;
2927         int ret;
2928
2929         ret = kstrtoul(page, 0, &tg_pt_gp_id);
2930         if (ret < 0) {
2931                 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n",
2932                        page);
2933                 return ret;
2934         }
2935         if (tg_pt_gp_id > 0x0000ffff) {
2936                 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n",
2937                        tg_pt_gp_id);
2938                 return -EINVAL;
2939         }
2940
2941         ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2942         if (ret < 0)
2943                 return -EINVAL;
2944
2945         pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2946                 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2947                 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2948                 tg_pt_gp->tg_pt_gp_id);
2949
2950         return count;
2951 }
2952
2953 static ssize_t target_tg_pt_gp_members_show(struct config_item *item,
2954                 char *page)
2955 {
2956         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2957         struct se_lun *lun;
2958         ssize_t len = 0, cur_len;
2959         unsigned char buf[TG_PT_GROUP_NAME_BUF];
2960
2961         memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2962
2963         spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2964         list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
2965                         lun_tg_pt_gp_link) {
2966                 struct se_portal_group *tpg = lun->lun_tpg;
2967
2968                 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2969                         "/%s\n", tpg->se_tpg_tfo->fabric_name,
2970                         tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2971                         tpg->se_tpg_tfo->tpg_get_tag(tpg),
2972                         config_item_name(&lun->lun_group.cg_item));
2973                 cur_len++; /* Extra byte for NULL terminator */
2974
2975                 if ((cur_len + len) > PAGE_SIZE) {
2976                         pr_warn("Ran out of lu_gp_show_attr"
2977                                 "_members buffer\n");
2978                         break;
2979                 }
2980                 memcpy(page+len, buf, cur_len);
2981                 len += cur_len;
2982         }
2983         spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2984
2985         return len;
2986 }
2987
2988 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state);
2989 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status);
2990 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type);
2991 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning);
2992 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline);
2993 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent);
2994 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable);
2995 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby);
2996 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized);
2997 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized);
2998 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata);
2999 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs);
3000 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs);
3001 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs);
3002 CONFIGFS_ATTR(target_tg_pt_gp_, preferred);
3003 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id);
3004 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members);
3005
3006 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
3007         &target_tg_pt_gp_attr_alua_access_state,
3008         &target_tg_pt_gp_attr_alua_access_status,
3009         &target_tg_pt_gp_attr_alua_access_type,
3010         &target_tg_pt_gp_attr_alua_support_transitioning,
3011         &target_tg_pt_gp_attr_alua_support_offline,
3012         &target_tg_pt_gp_attr_alua_support_lba_dependent,
3013         &target_tg_pt_gp_attr_alua_support_unavailable,
3014         &target_tg_pt_gp_attr_alua_support_standby,
3015         &target_tg_pt_gp_attr_alua_support_active_nonoptimized,
3016         &target_tg_pt_gp_attr_alua_support_active_optimized,
3017         &target_tg_pt_gp_attr_alua_write_metadata,
3018         &target_tg_pt_gp_attr_nonop_delay_msecs,
3019         &target_tg_pt_gp_attr_trans_delay_msecs,
3020         &target_tg_pt_gp_attr_implicit_trans_secs,
3021         &target_tg_pt_gp_attr_preferred,
3022         &target_tg_pt_gp_attr_tg_pt_gp_id,
3023         &target_tg_pt_gp_attr_members,
3024         NULL,
3025 };
3026
3027 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
3028 {
3029         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3030                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3031
3032         core_alua_free_tg_pt_gp(tg_pt_gp);
3033 }
3034
3035 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
3036         .release                = target_core_alua_tg_pt_gp_release,
3037 };
3038
3039 static const struct config_item_type target_core_alua_tg_pt_gp_cit = {
3040         .ct_item_ops            = &target_core_alua_tg_pt_gp_ops,
3041         .ct_attrs               = target_core_alua_tg_pt_gp_attrs,
3042         .ct_owner               = THIS_MODULE,
3043 };
3044
3045 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
3046
3047 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3048
3049 static struct config_group *target_core_alua_create_tg_pt_gp(
3050         struct config_group *group,
3051         const char *name)
3052 {
3053         struct t10_alua *alua = container_of(group, struct t10_alua,
3054                                         alua_tg_pt_gps_group);
3055         struct t10_alua_tg_pt_gp *tg_pt_gp;
3056         struct config_group *alua_tg_pt_gp_cg = NULL;
3057         struct config_item *alua_tg_pt_gp_ci = NULL;
3058
3059         tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
3060         if (!tg_pt_gp)
3061                 return NULL;
3062
3063         alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
3064         alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
3065
3066         config_group_init_type_name(alua_tg_pt_gp_cg, name,
3067                         &target_core_alua_tg_pt_gp_cit);
3068
3069         pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
3070                 " Group: alua/tg_pt_gps/%s\n",
3071                 config_item_name(alua_tg_pt_gp_ci));
3072
3073         return alua_tg_pt_gp_cg;
3074 }
3075
3076 static void target_core_alua_drop_tg_pt_gp(
3077         struct config_group *group,
3078         struct config_item *item)
3079 {
3080         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3081                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3082
3083         pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
3084                 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
3085                 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
3086         /*
3087          * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
3088          * -> target_core_alua_tg_pt_gp_release().
3089          */
3090         config_item_put(item);
3091 }
3092
3093 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
3094         .make_group             = &target_core_alua_create_tg_pt_gp,
3095         .drop_item              = &target_core_alua_drop_tg_pt_gp,
3096 };
3097
3098 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
3099
3100 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3101
3102 /* Start functions for struct config_item_type target_core_alua_cit */
3103
3104 /*
3105  * target_core_alua_cit is a ConfigFS group that lives under
3106  * /sys/kernel/config/target/core/alua.  There are default groups
3107  * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
3108  * target_core_alua_cit in target_core_init_configfs() below.
3109  */
3110 static const struct config_item_type target_core_alua_cit = {
3111         .ct_item_ops            = NULL,
3112         .ct_attrs               = NULL,
3113         .ct_owner               = THIS_MODULE,
3114 };
3115
3116 /* End functions for struct config_item_type target_core_alua_cit */
3117
3118 /* Start functions for struct config_item_type tb_dev_stat_cit */
3119
3120 static struct config_group *target_core_stat_mkdir(
3121         struct config_group *group,
3122         const char *name)
3123 {
3124         return ERR_PTR(-ENOSYS);
3125 }
3126
3127 static void target_core_stat_rmdir(
3128         struct config_group *group,
3129         struct config_item *item)
3130 {
3131         return;
3132 }
3133
3134 static struct configfs_group_operations target_core_stat_group_ops = {
3135         .make_group             = &target_core_stat_mkdir,
3136         .drop_item              = &target_core_stat_rmdir,
3137 };
3138
3139 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
3140
3141 /* End functions for struct config_item_type tb_dev_stat_cit */
3142
3143 /* Start functions for struct config_item_type target_core_hba_cit */
3144
3145 static struct config_group *target_core_make_subdev(
3146         struct config_group *group,
3147         const char *name)
3148 {
3149         struct t10_alua_tg_pt_gp *tg_pt_gp;
3150         struct config_item *hba_ci = &group->cg_item;
3151         struct se_hba *hba = item_to_hba(hba_ci);
3152         struct target_backend *tb = hba->backend;
3153         struct se_device *dev;
3154         int errno = -ENOMEM, ret;
3155
3156         ret = mutex_lock_interruptible(&hba->hba_access_mutex);
3157         if (ret)
3158                 return ERR_PTR(ret);
3159
3160         dev = target_alloc_device(hba, name);
3161         if (!dev)
3162                 goto out_unlock;
3163
3164         config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit);
3165
3166         config_group_init_type_name(&dev->dev_action_group, "action",
3167                         &tb->tb_dev_action_cit);
3168         configfs_add_default_group(&dev->dev_action_group, &dev->dev_group);
3169
3170         config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
3171                         &tb->tb_dev_attrib_cit);
3172         configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group);
3173
3174         config_group_init_type_name(&dev->dev_pr_group, "pr",
3175                         &tb->tb_dev_pr_cit);
3176         configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group);
3177
3178         config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
3179                         &tb->tb_dev_wwn_cit);
3180         configfs_add_default_group(&dev->t10_wwn.t10_wwn_group,
3181                         &dev->dev_group);
3182
3183         config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
3184                         "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
3185         configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group,
3186                         &dev->dev_group);
3187
3188         config_group_init_type_name(&dev->dev_stat_grps.stat_group,
3189                         "statistics", &tb->tb_dev_stat_cit);
3190         configfs_add_default_group(&dev->dev_stat_grps.stat_group,
3191                         &dev->dev_group);
3192
3193         /*
3194          * Add core/$HBA/$DEV/alua/default_tg_pt_gp
3195          */
3196         tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
3197         if (!tg_pt_gp)
3198                 goto out_free_device;
3199         dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
3200
3201         config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
3202                         "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
3203         configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group,
3204                         &dev->t10_alua.alua_tg_pt_gps_group);
3205
3206         /*
3207          * Add core/$HBA/$DEV/statistics/ default groups
3208          */
3209         target_stat_setup_dev_default_groups(dev);
3210
3211         mutex_unlock(&hba->hba_access_mutex);
3212         return &dev->dev_group;
3213
3214 out_free_device:
3215         target_free_device(dev);
3216 out_unlock:
3217         mutex_unlock(&hba->hba_access_mutex);
3218         return ERR_PTR(errno);
3219 }
3220
3221 static void target_core_drop_subdev(
3222         struct config_group *group,
3223         struct config_item *item)
3224 {
3225         struct config_group *dev_cg = to_config_group(item);
3226         struct se_device *dev =
3227                 container_of(dev_cg, struct se_device, dev_group);
3228         struct se_hba *hba;
3229
3230         hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
3231
3232         mutex_lock(&hba->hba_access_mutex);
3233
3234         configfs_remove_default_groups(&dev->dev_stat_grps.stat_group);
3235         configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group);
3236
3237         /*
3238          * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
3239          * directly from target_core_alua_tg_pt_gp_release().
3240          */
3241         dev->t10_alua.default_tg_pt_gp = NULL;
3242
3243         configfs_remove_default_groups(dev_cg);
3244
3245         /*
3246          * se_dev is released from target_core_dev_item_ops->release()
3247          */
3248         config_item_put(item);
3249         mutex_unlock(&hba->hba_access_mutex);
3250 }
3251
3252 static struct configfs_group_operations target_core_hba_group_ops = {
3253         .make_group             = target_core_make_subdev,
3254         .drop_item              = target_core_drop_subdev,
3255 };
3256
3257
3258 static inline struct se_hba *to_hba(struct config_item *item)
3259 {
3260         return container_of(to_config_group(item), struct se_hba, hba_group);
3261 }
3262
3263 static ssize_t target_hba_info_show(struct config_item *item, char *page)
3264 {
3265         struct se_hba *hba = to_hba(item);
3266
3267         return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
3268                         hba->hba_id, hba->backend->ops->name,
3269                         TARGET_CORE_VERSION);
3270 }
3271
3272 static ssize_t target_hba_mode_show(struct config_item *item, char *page)
3273 {
3274         struct se_hba *hba = to_hba(item);
3275         int hba_mode = 0;
3276
3277         if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
3278                 hba_mode = 1;
3279
3280         return sprintf(page, "%d\n", hba_mode);
3281 }
3282
3283 static ssize_t target_hba_mode_store(struct config_item *item,
3284                 const char *page, size_t count)
3285 {
3286         struct se_hba *hba = to_hba(item);
3287         unsigned long mode_flag;
3288         int ret;
3289
3290         if (hba->backend->ops->pmode_enable_hba == NULL)
3291                 return -EINVAL;
3292
3293         ret = kstrtoul(page, 0, &mode_flag);
3294         if (ret < 0) {
3295                 pr_err("Unable to extract hba mode flag: %d\n", ret);
3296                 return ret;
3297         }
3298
3299         if (hba->dev_count) {
3300                 pr_err("Unable to set hba_mode with active devices\n");
3301                 return -EINVAL;
3302         }
3303
3304         ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
3305         if (ret < 0)
3306                 return -EINVAL;
3307         if (ret > 0)
3308                 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3309         else if (ret == 0)
3310                 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3311
3312         return count;
3313 }
3314
3315 CONFIGFS_ATTR_RO(target_, hba_info);
3316 CONFIGFS_ATTR(target_, hba_mode);
3317
3318 static void target_core_hba_release(struct config_item *item)
3319 {
3320         struct se_hba *hba = container_of(to_config_group(item),
3321                                 struct se_hba, hba_group);
3322         core_delete_hba(hba);
3323 }
3324
3325 static struct configfs_attribute *target_core_hba_attrs[] = {
3326         &target_attr_hba_info,
3327         &target_attr_hba_mode,
3328         NULL,
3329 };
3330
3331 static struct configfs_item_operations target_core_hba_item_ops = {
3332         .release                = target_core_hba_release,
3333 };
3334
3335 static const struct config_item_type target_core_hba_cit = {
3336         .ct_item_ops            = &target_core_hba_item_ops,
3337         .ct_group_ops           = &target_core_hba_group_ops,
3338         .ct_attrs               = target_core_hba_attrs,
3339         .ct_owner               = THIS_MODULE,
3340 };
3341
3342 static struct config_group *target_core_call_addhbatotarget(
3343         struct config_group *group,
3344         const char *name)
3345 {
3346         char *se_plugin_str, *str, *str2;
3347         struct se_hba *hba;
3348         char buf[TARGET_CORE_NAME_MAX_LEN];
3349         unsigned long plugin_dep_id = 0;
3350         int ret;
3351
3352         memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3353         if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3354                 pr_err("Passed *name strlen(): %d exceeds"
3355                         " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3356                         TARGET_CORE_NAME_MAX_LEN);
3357                 return ERR_PTR(-ENAMETOOLONG);
3358         }
3359         snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3360
3361         str = strstr(buf, "_");
3362         if (!str) {
3363                 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3364                 return ERR_PTR(-EINVAL);
3365         }
3366         se_plugin_str = buf;
3367         /*
3368          * Special case for subsystem plugins that have "_" in their names.
3369          * Namely rd_direct and rd_mcp..
3370          */
3371         str2 = strstr(str+1, "_");
3372         if (str2) {
3373                 *str2 = '\0'; /* Terminate for *se_plugin_str */
3374                 str2++; /* Skip to start of plugin dependent ID */
3375                 str = str2;
3376         } else {
3377                 *str = '\0'; /* Terminate for *se_plugin_str */
3378                 str++; /* Skip to start of plugin dependent ID */
3379         }
3380
3381         ret = kstrtoul(str, 0, &plugin_dep_id);
3382         if (ret < 0) {
3383                 pr_err("kstrtoul() returned %d for"
3384                                 " plugin_dep_id\n", ret);
3385                 return ERR_PTR(ret);
3386         }
3387         /*
3388          * Load up TCM subsystem plugins if they have not already been loaded.
3389          */
3390         transport_subsystem_check_init();
3391
3392         hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3393         if (IS_ERR(hba))
3394                 return ERR_CAST(hba);
3395
3396         config_group_init_type_name(&hba->hba_group, name,
3397                         &target_core_hba_cit);
3398
3399         return &hba->hba_group;
3400 }
3401
3402 static void target_core_call_delhbafromtarget(
3403         struct config_group *group,
3404         struct config_item *item)
3405 {
3406         /*
3407          * core_delete_hba() is called from target_core_hba_item_ops->release()
3408          * -> target_core_hba_release()
3409          */
3410         config_item_put(item);
3411 }
3412
3413 static struct configfs_group_operations target_core_group_ops = {
3414         .make_group     = target_core_call_addhbatotarget,
3415         .drop_item      = target_core_call_delhbafromtarget,
3416 };
3417
3418 static const struct config_item_type target_core_cit = {
3419         .ct_item_ops    = NULL,
3420         .ct_group_ops   = &target_core_group_ops,
3421         .ct_attrs       = NULL,
3422         .ct_owner       = THIS_MODULE,
3423 };
3424
3425 /* Stop functions for struct config_item_type target_core_hba_cit */
3426
3427 void target_setup_backend_cits(struct target_backend *tb)
3428 {
3429         target_core_setup_dev_cit(tb);
3430         target_core_setup_dev_action_cit(tb);
3431         target_core_setup_dev_attrib_cit(tb);
3432         target_core_setup_dev_pr_cit(tb);
3433         target_core_setup_dev_wwn_cit(tb);
3434         target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3435         target_core_setup_dev_stat_cit(tb);
3436 }
3437
3438 static void target_init_dbroot(void)
3439 {
3440         struct file *fp;
3441
3442         snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED);
3443         fp = filp_open(db_root_stage, O_RDONLY, 0);
3444         if (IS_ERR(fp)) {
3445                 pr_err("db_root: cannot open: %s\n", db_root_stage);
3446                 return;
3447         }
3448         if (!S_ISDIR(file_inode(fp)->i_mode)) {
3449                 filp_close(fp, NULL);
3450                 pr_err("db_root: not a valid directory: %s\n", db_root_stage);
3451                 return;
3452         }
3453         filp_close(fp, NULL);
3454
3455         strncpy(db_root, db_root_stage, DB_ROOT_LEN);
3456         pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
3457 }
3458
3459 static int __init target_core_init_configfs(void)
3460 {
3461         struct configfs_subsystem *subsys = &target_core_fabrics;
3462         struct t10_alua_lu_gp *lu_gp;
3463         int ret;
3464
3465         pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3466                 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3467                 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3468
3469         config_group_init(&subsys->su_group);
3470         mutex_init(&subsys->su_mutex);
3471
3472         ret = init_se_kmem_caches();
3473         if (ret < 0)
3474                 return ret;
3475         /*
3476          * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3477          * and ALUA Logical Unit Group and Target Port Group infrastructure.
3478          */
3479         config_group_init_type_name(&target_core_hbagroup, "core",
3480                         &target_core_cit);
3481         configfs_add_default_group(&target_core_hbagroup, &subsys->su_group);
3482
3483         /*
3484          * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3485          */
3486         config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit);
3487         configfs_add_default_group(&alua_group, &target_core_hbagroup);
3488
3489         /*
3490          * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3491          * groups under /sys/kernel/config/target/core/alua/
3492          */
3493         config_group_init_type_name(&alua_lu_gps_group, "lu_gps",
3494                         &target_core_alua_lu_gps_cit);
3495         configfs_add_default_group(&alua_lu_gps_group, &alua_group);
3496
3497         /*
3498          * Add core/alua/lu_gps/default_lu_gp
3499          */
3500         lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3501         if (IS_ERR(lu_gp)) {
3502                 ret = -ENOMEM;
3503                 goto out_global;
3504         }
3505
3506         config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3507                                 &target_core_alua_lu_gp_cit);
3508         configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group);
3509
3510         default_lu_gp = lu_gp;
3511
3512         /*
3513          * Register the target_core_mod subsystem with configfs.
3514          */
3515         ret = configfs_register_subsystem(subsys);
3516         if (ret < 0) {
3517                 pr_err("Error %d while registering subsystem %s\n",
3518                         ret, subsys->su_group.cg_item.ci_namebuf);
3519                 goto out_global;
3520         }
3521         pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3522                 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
3523                 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3524         /*
3525          * Register built-in RAMDISK subsystem logic for virtual LUN 0
3526          */
3527         ret = rd_module_init();
3528         if (ret < 0)
3529                 goto out;
3530
3531         ret = core_dev_setup_virtual_lun0();
3532         if (ret < 0)
3533                 goto out;
3534
3535         ret = target_xcopy_setup_pt();
3536         if (ret < 0)
3537                 goto out;
3538
3539         target_init_dbroot();
3540
3541         return 0;
3542
3543 out:
3544         configfs_unregister_subsystem(subsys);
3545         core_dev_release_virtual_lun0();
3546         rd_module_exit();
3547 out_global:
3548         if (default_lu_gp) {
3549                 core_alua_free_lu_gp(default_lu_gp);
3550                 default_lu_gp = NULL;
3551         }
3552         release_se_kmem_caches();
3553         return ret;
3554 }
3555
3556 static void __exit target_core_exit_configfs(void)
3557 {
3558         configfs_remove_default_groups(&alua_lu_gps_group);
3559         configfs_remove_default_groups(&alua_group);
3560         configfs_remove_default_groups(&target_core_hbagroup);
3561
3562         /*
3563          * We expect subsys->su_group.default_groups to be released
3564          * by configfs subsystem provider logic..
3565          */
3566         configfs_unregister_subsystem(&target_core_fabrics);
3567
3568         core_alua_free_lu_gp(default_lu_gp);
3569         default_lu_gp = NULL;
3570
3571         pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3572                         " Infrastructure\n");
3573
3574         core_dev_release_virtual_lun0();
3575         rd_module_exit();
3576         target_xcopy_release_pt();
3577         release_se_kmem_caches();
3578 }
3579
3580 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3581 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3582 MODULE_LICENSE("GPL");
3583
3584 module_init(target_core_init_configfs);
3585 module_exit(target_core_exit_configfs);