drivers/target/target_core_configfs.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*******************************************************************************
   3  * Filename:  target_core_configfs.c
   4  *
   5  * This file contains ConfigFS logic for the Generic Target Engine project.
   6  *
   7  * (c) Copyright 2008-2013 Datera, Inc.
   8  *
   9  * Nicholas A. Bellinger <nab@kernel.org>
  10  *
  11  * based on configfs Copyright (C) 2005 Oracle.  All rights reserved.
  12  *
  13  ****************************************************************************/
  14
  15 #include <linux/module.h>
  16 #include <linux/moduleparam.h>
  17 #include <generated/utsrelease.h>
  18 #include <linux/utsname.h>
  19 #include <linux/init.h>
  20 #include <linux/fs.h>
  21 #include <linux/namei.h>
  22 #include <linux/slab.h>
  23 #include <linux/types.h>
  24 #include <linux/delay.h>
  25 #include <linux/unistd.h>
  26 #include <linux/string.h>
  27 #include <linux/parser.h>
  28 #include <linux/syscalls.h>
  29 #include <linux/configfs.h>
  30 #include <linux/spinlock.h>
  31
  32 #include <target/target_core_base.h>
  33 #include <target/target_core_backend.h>
  34 #include <target/target_core_fabric.h>
  35
  36 #include "target_core_internal.h"
  37 #include "target_core_alua.h"
  38 #include "target_core_pr.h"
  39 #include "target_core_rd.h"
  40 #include "target_core_xcopy.h"
  41
  42 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs)              \
  43 static void target_core_setup_##_name##_cit(struct target_backend *tb)  \
  44 {                                                                       \
  45         struct config_item_type *cit = &tb->tb_##_name##_cit;           \
  46                                                                         \
  47         cit->ct_item_ops = _item_ops;                                   \
  48         cit->ct_group_ops = _group_ops;                                 \
  49         cit->ct_attrs = _attrs;                                         \
  50         cit->ct_owner = tb->ops->owner;                                 \
  51         pr_debug("Setup generic %s\n", __stringify(_name));             \
  52 }
  53
  54 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops)                  \
  55 static void target_core_setup_##_name##_cit(struct target_backend *tb)  \
  56 {                                                                       \
  57         struct config_item_type *cit = &tb->tb_##_name##_cit;           \
  58                                                                         \
  59         cit->ct_item_ops = _item_ops;                                   \
  60         cit->ct_group_ops = _group_ops;                                 \
  61         cit->ct_attrs = tb->ops->tb_##_name##_attrs;                    \
  62         cit->ct_owner = tb->ops->owner;                                 \
  63         pr_debug("Setup generic %s\n", __stringify(_name));             \
  64 }
  65
  66 extern struct t10_alua_lu_gp *default_lu_gp;
  67
  68 static LIST_HEAD(g_tf_list);
  69 static DEFINE_MUTEX(g_tf_lock);
  70
  71 static struct config_group target_core_hbagroup;
  72 static struct config_group alua_group;
  73 static struct config_group alua_lu_gps_group;
  74
  75 static inline struct se_hba *
  76 item_to_hba(struct config_item *item)
  77 {
  78         return container_of(to_config_group(item), struct se_hba, hba_group);
  79 }
  80
  81 /*
  82  * Attributes for /sys/kernel/config/target/
  83  */
  84 static ssize_t target_core_item_version_show(struct config_item *item,
  85                 char *page)
  86 {
  87         return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
  88                 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION,
  89                 utsname()->sysname, utsname()->machine);
  90 }
  91
  92 CONFIGFS_ATTR_RO(target_core_item_, version);
  93
  94 char db_root[DB_ROOT_LEN] = DB_ROOT_DEFAULT;
  95 static char db_root_stage[DB_ROOT_LEN];
  96
  97 static ssize_t target_core_item_dbroot_show(struct config_item *item,
  98                                             char *page)
  99 {
 100         return sprintf(page, "%s\n", db_root);
 101 }
 102
 103 static ssize_t target_core_item_dbroot_store(struct config_item *item,
 104                                         const char *page, size_t count)
 105 {
 106         ssize_t read_bytes;
 107         struct file *fp;
 108
 109         mutex_lock(&g_tf_lock);
 110         if (!list_empty(&g_tf_list)) {
 111                 mutex_unlock(&g_tf_lock);
 112                 pr_err("db_root: cannot be changed: target drivers registered");
 113                 return -EINVAL;
 114         }
 115
 116         if (count > (DB_ROOT_LEN - 1)) {
 117                 mutex_unlock(&g_tf_lock);
 118                 pr_err("db_root: count %d exceeds DB_ROOT_LEN-1: %u\n",
 119                        (int)count, DB_ROOT_LEN - 1);
 120                 return -EINVAL;
 121         }
 122
 123         read_bytes = snprintf(db_root_stage, DB_ROOT_LEN, "%s", page);
 124         if (!read_bytes) {
 125                 mutex_unlock(&g_tf_lock);
 126                 return -EINVAL;
 127         }
 128         if (db_root_stage[read_bytes - 1] == '\n')
 129                 db_root_stage[read_bytes - 1] = '\0';
 130
 131         /* validate new db root before accepting it */
 132         fp = filp_open(db_root_stage, O_RDONLY, 0);
 133         if (IS_ERR(fp)) {
 134                 mutex_unlock(&g_tf_lock);
 135                 pr_err("db_root: cannot open: %s\n", db_root_stage);
 136                 return -EINVAL;
 137         }
 138         if (!S_ISDIR(file_inode(fp)->i_mode)) {
 139                 filp_close(fp, NULL);
 140                 mutex_unlock(&g_tf_lock);
 141                 pr_err("db_root: not a directory: %s\n", db_root_stage);
 142                 return -EINVAL;
 143         }
 144         filp_close(fp, NULL);
 145
 146         strncpy(db_root, db_root_stage, read_bytes);
 147
 148         mutex_unlock(&g_tf_lock);
 149
 150         pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
 151
 152         return read_bytes;
 153 }
 154
 155 CONFIGFS_ATTR(target_core_item_, dbroot);
 156
 157 static struct target_fabric_configfs *target_core_get_fabric(
 158         const char *name)
 159 {
 160         struct target_fabric_configfs *tf;
 161
 162         if (!name)
 163                 return NULL;
 164
 165         mutex_lock(&g_tf_lock);
 166         list_for_each_entry(tf, &g_tf_list, tf_list) {
 167                 const char *cmp_name = tf->tf_ops->fabric_alias;
 168                 if (!cmp_name)
 169                         cmp_name = tf->tf_ops->fabric_name;
 170                 if (!strcmp(cmp_name, name)) {
 171                         atomic_inc(&tf->tf_access_cnt);
 172                         mutex_unlock(&g_tf_lock);
 173                         return tf;
 174                 }
 175         }
 176         mutex_unlock(&g_tf_lock);
 177
 178         return NULL;
 179 }
 180
 181 /*
 182  * Called from struct target_core_group_ops->make_group()
 183  */
 184 static struct config_group *target_core_register_fabric(
 185         struct config_group *group,
 186         const char *name)
 187 {
 188         struct target_fabric_configfs *tf;
 189         int ret;
 190
 191         pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
 192                         " %s\n", group, name);
 193
 194         tf = target_core_get_fabric(name);
 195         if (!tf) {
 196                 pr_debug("target_core_register_fabric() trying autoload for %s\n",
 197                          name);
 198
 199                 /*
 200                  * Below are some hardcoded request_module() calls to automatically
 201                  * local fabric modules when the following is called:
 202                  *
 203                  * mkdir -p /sys/kernel/config/target/$MODULE_NAME
 204                  *
 205                  * Note that this does not limit which TCM fabric module can be
 206                  * registered, but simply provids auto loading logic for modules with
 207                  * mkdir(2) system calls with known TCM fabric modules.
 208                  */
 209
 210                 if (!strncmp(name, "iscsi", 5)) {
 211                         /*
 212                          * Automatically load the LIO Target fabric module when the
 213                          * following is called:
 214                          *
 215                          * mkdir -p $CONFIGFS/target/iscsi
 216                          */
 217                         ret = request_module("iscsi_target_mod");
 218                         if (ret < 0) {
 219                                 pr_debug("request_module() failed for"
 220                                          " iscsi_target_mod.ko: %d\n", ret);
 221                                 return ERR_PTR(-EINVAL);
 222                         }
 223                 } else if (!strncmp(name, "loopback", 8)) {
 224                         /*
 225                          * Automatically load the tcm_loop fabric module when the
 226                          * following is called:
 227                          *
 228                          * mkdir -p $CONFIGFS/target/loopback
 229                          */
 230                         ret = request_module("tcm_loop");
 231                         if (ret < 0) {
 232                                 pr_debug("request_module() failed for"
 233                                          " tcm_loop.ko: %d\n", ret);
 234                                 return ERR_PTR(-EINVAL);
 235                         }
 236                 }
 237
 238                 tf = target_core_get_fabric(name);
 239         }
 240
 241         if (!tf) {
 242                 pr_debug("target_core_get_fabric() failed for %s\n",
 243                          name);
 244                 return ERR_PTR(-EINVAL);
 245         }
 246         pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
 247                         " %s\n", tf->tf_ops->fabric_name);
 248         /*
 249          * On a successful target_core_get_fabric() look, the returned
 250          * struct target_fabric_configfs *tf will contain a usage reference.
 251          */
 252         pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
 253                         &tf->tf_wwn_cit);
 254
 255         config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit);
 256
 257         config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
 258                         &tf->tf_discovery_cit);
 259         configfs_add_default_group(&tf->tf_disc_group, &tf->tf_group);
 260
 261         pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric: %s\n",
 262                  config_item_name(&tf->tf_group.cg_item));
 263         return &tf->tf_group;
 264 }
 265
 266 /*
 267  * Called from struct target_core_group_ops->drop_item()
 268  */
 269 static void target_core_deregister_fabric(
 270         struct config_group *group,
 271         struct config_item *item)
 272 {
 273         struct target_fabric_configfs *tf = container_of(
 274                 to_config_group(item), struct target_fabric_configfs, tf_group);
 275
 276         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
 277                 " tf list\n", config_item_name(item));
 278
 279         pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
 280                         " %s\n", tf->tf_ops->fabric_name);
 281         atomic_dec(&tf->tf_access_cnt);
 282
 283         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
 284                         " %s\n", config_item_name(item));
 285
 286         configfs_remove_default_groups(&tf->tf_group);
 287         config_item_put(item);
 288 }
 289
 290 static struct configfs_group_operations target_core_fabric_group_ops = {
 291         .make_group     = &target_core_register_fabric,
 292         .drop_item      = &target_core_deregister_fabric,
 293 };
 294
 295 /*
 296  * All item attributes appearing in /sys/kernel/target/ appear here.
 297  */
 298 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
 299         &target_core_item_attr_version,
 300         &target_core_item_attr_dbroot,
 301         NULL,
 302 };
 303
 304 /*
 305  * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
 306  */
 307 static const struct config_item_type target_core_fabrics_item = {
 308         .ct_group_ops   = &target_core_fabric_group_ops,
 309         .ct_attrs       = target_core_fabric_item_attrs,
 310         .ct_owner       = THIS_MODULE,
 311 };
 312
 313 static struct configfs_subsystem target_core_fabrics = {
 314         .su_group = {
 315                 .cg_item = {
 316                         .ci_namebuf = "target",
 317                         .ci_type = &target_core_fabrics_item,
 318                 },
 319         },
 320 };
 321
 322 int target_depend_item(struct config_item *item)
 323 {
 324         return configfs_depend_item(&target_core_fabrics, item);
 325 }
 326 EXPORT_SYMBOL(target_depend_item);
 327
 328 void target_undepend_item(struct config_item *item)
 329 {
 330         return configfs_undepend_item(item);
 331 }
 332 EXPORT_SYMBOL(target_undepend_item);
 333
 334 /*##############################################################################
 335 // Start functions called by external Target Fabrics Modules
 336 //############################################################################*/
 337
 338 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
 339 {
 340         if (tfo->fabric_alias) {
 341                 if (strlen(tfo->fabric_alias) >= TARGET_FABRIC_NAME_SIZE) {
 342                         pr_err("Passed alias: %s exceeds "
 343                                 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_alias);
 344                         return -EINVAL;
 345                 }
 346         }
 347         if (!tfo->fabric_name) {
 348                 pr_err("Missing tfo->fabric_name\n");
 349                 return -EINVAL;
 350         }
 351         if (strlen(tfo->fabric_name) >= TARGET_FABRIC_NAME_SIZE) {
 352                 pr_err("Passed name: %s exceeds "
 353                         "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_name);
 354                 return -EINVAL;
 355         }
 356         if (!tfo->tpg_get_wwn) {
 357                 pr_err("Missing tfo->tpg_get_wwn()\n");
 358                 return -EINVAL;
 359         }
 360         if (!tfo->tpg_get_tag) {
 361                 pr_err("Missing tfo->tpg_get_tag()\n");
 362                 return -EINVAL;
 363         }
 364         if (!tfo->tpg_check_demo_mode) {
 365                 pr_err("Missing tfo->tpg_check_demo_mode()\n");
 366                 return -EINVAL;
 367         }
 368         if (!tfo->tpg_check_demo_mode_cache) {
 369                 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
 370                 return -EINVAL;
 371         }
 372         if (!tfo->tpg_check_demo_mode_write_protect) {
 373                 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
 374                 return -EINVAL;
 375         }
 376         if (!tfo->tpg_check_prod_mode_write_protect) {
 377                 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
 378                 return -EINVAL;
 379         }
 380         if (!tfo->tpg_get_inst_index) {
 381                 pr_err("Missing tfo->tpg_get_inst_index()\n");
 382                 return -EINVAL;
 383         }
 384         if (!tfo->release_cmd) {
 385                 pr_err("Missing tfo->release_cmd()\n");
 386                 return -EINVAL;
 387         }
 388         if (!tfo->sess_get_index) {
 389                 pr_err("Missing tfo->sess_get_index()\n");
 390                 return -EINVAL;
 391         }
 392         if (!tfo->write_pending) {
 393                 pr_err("Missing tfo->write_pending()\n");
 394                 return -EINVAL;
 395         }
 396         if (!tfo->set_default_node_attributes) {
 397                 pr_err("Missing tfo->set_default_node_attributes()\n");
 398                 return -EINVAL;
 399         }
 400         if (!tfo->get_cmd_state) {
 401                 pr_err("Missing tfo->get_cmd_state()\n");
 402                 return -EINVAL;
 403         }
 404         if (!tfo->queue_data_in) {
 405                 pr_err("Missing tfo->queue_data_in()\n");
 406                 return -EINVAL;
 407         }
 408         if (!tfo->queue_status) {
 409                 pr_err("Missing tfo->queue_status()\n");
 410                 return -EINVAL;
 411         }
 412         if (!tfo->queue_tm_rsp) {
 413                 pr_err("Missing tfo->queue_tm_rsp()\n");
 414                 return -EINVAL;
 415         }
 416         if (!tfo->aborted_task) {
 417                 pr_err("Missing tfo->aborted_task()\n");
 418                 return -EINVAL;
 419         }
 420         if (!tfo->check_stop_free) {
 421                 pr_err("Missing tfo->check_stop_free()\n");
 422                 return -EINVAL;
 423         }
 424         /*
 425          * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
 426          * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
 427          * target_core_fabric_configfs.c WWN+TPG group context code.
 428          */
 429         if (!tfo->fabric_make_wwn) {
 430                 pr_err("Missing tfo->fabric_make_wwn()\n");
 431                 return -EINVAL;
 432         }
 433         if (!tfo->fabric_drop_wwn) {
 434                 pr_err("Missing tfo->fabric_drop_wwn()\n");
 435                 return -EINVAL;
 436         }
 437         if (!tfo->fabric_make_tpg) {
 438                 pr_err("Missing tfo->fabric_make_tpg()\n");
 439                 return -EINVAL;
 440         }
 441         if (!tfo->fabric_drop_tpg) {
 442                 pr_err("Missing tfo->fabric_drop_tpg()\n");
 443                 return -EINVAL;
 444         }
 445
 446         return 0;
 447 }
 448
 449 int target_register_template(const struct target_core_fabric_ops *fo)
 450 {
 451         struct target_fabric_configfs *tf;
 452         int ret;
 453
 454         ret = target_fabric_tf_ops_check(fo);
 455         if (ret)
 456                 return ret;
 457
 458         tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
 459         if (!tf) {
 460                 pr_err("%s: could not allocate memory!\n", __func__);
 461                 return -ENOMEM;
 462         }
 463
 464         INIT_LIST_HEAD(&tf->tf_list);
 465         atomic_set(&tf->tf_access_cnt, 0);
 466         tf->tf_ops = fo;
 467         target_fabric_setup_cits(tf);
 468
 469         mutex_lock(&g_tf_lock);
 470         list_add_tail(&tf->tf_list, &g_tf_list);
 471         mutex_unlock(&g_tf_lock);
 472
 473         return 0;
 474 }
 475 EXPORT_SYMBOL(target_register_template);
 476
 477 void target_unregister_template(const struct target_core_fabric_ops *fo)
 478 {
 479         struct target_fabric_configfs *t;
 480
 481         mutex_lock(&g_tf_lock);
 482         list_for_each_entry(t, &g_tf_list, tf_list) {
 483                 if (!strcmp(t->tf_ops->fabric_name, fo->fabric_name)) {
 484                         BUG_ON(atomic_read(&t->tf_access_cnt));
 485                         list_del(&t->tf_list);
 486                         mutex_unlock(&g_tf_lock);
 487                         /*
 488                          * Wait for any outstanding fabric se_deve_entry->rcu_head
 489                          * callbacks to complete post kfree_rcu(), before allowing
 490                          * fabric driver unload of TFO->module to proceed.
 491                          */
 492                         rcu_barrier();
 493                         kfree(t);
 494                         return;
 495                 }
 496         }
 497         mutex_unlock(&g_tf_lock);
 498 }
 499 EXPORT_SYMBOL(target_unregister_template);
 500
 501 /*##############################################################################
 502 // Stop functions called by external Target Fabrics Modules
 503 //############################################################################*/
 504
 505 static inline struct se_dev_attrib *to_attrib(struct config_item *item)
 506 {
 507         return container_of(to_config_group(item), struct se_dev_attrib,
 508                         da_group);
 509 }
 510
 511 /* Start functions for struct config_item_type tb_dev_attrib_cit */
 512 #define DEF_CONFIGFS_ATTRIB_SHOW(_name)                                 \
 513 static ssize_t _name##_show(struct config_item *item, char *page)       \
 514 {                                                                       \
 515         return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \
 516 }
 517
 518 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias);
 519 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo);
 520 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write);
 521 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read);
 522 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache);
 523 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl);
 524 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas);
 525 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu);
 526 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws);
 527 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw);
 528 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc);
 529 DEF_CONFIGFS_ATTRIB_SHOW(emulate_pr);
 530 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type);
 531 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type);
 532 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify);
 533 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids);
 534 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot);
 535 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord);
 536 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl);
 537 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size);
 538 DEF_CONFIGFS_ATTRIB_SHOW(block_size);
 539 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors);
 540 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors);
 541 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth);
 542 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth);
 543 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count);
 544 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count);
 545 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity);
 546 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment);
 547 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data);
 548 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len);
 549
 550 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name)                            \
 551 static ssize_t _name##_store(struct config_item *item, const char *page,\
 552                 size_t count)                                           \
 553 {                                                                       \
 554         struct se_dev_attrib *da = to_attrib(item);                     \
 555         u32 val;                                                        \
 556         int ret;                                                        \
 557                                                                         \
 558         ret = kstrtou32(page, 0, &val);                                 \
 559         if (ret < 0)                                                    \
 560                 return ret;                                             \
 561         da->_name = val;                                                \
 562         return count;                                                   \
 563 }
 564
 565 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count);
 566 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count);
 567 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity);
 568 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment);
 569 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len);
 570
 571 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name)                           \
 572 static ssize_t _name##_store(struct config_item *item, const char *page,        \
 573                 size_t count)                                           \
 574 {                                                                       \
 575         struct se_dev_attrib *da = to_attrib(item);                     \
 576         bool flag;                                                      \
 577         int ret;                                                        \
 578                                                                         \
 579         ret = strtobool(page, &flag);                                   \
 580         if (ret < 0)                                                    \
 581                 return ret;                                             \
 582         da->_name = flag;                                               \
 583         return count;                                                   \
 584 }
 585
 586 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write);
 587 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw);
 588 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc);
 589 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr);
 590 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids);
 591 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot);
 592
 593 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name)                           \
 594 static ssize_t _name##_store(struct config_item *item, const char *page,\
 595                 size_t count)                                           \
 596 {                                                                       \
 597         printk_once(KERN_WARNING                                        \
 598                 "ignoring deprecated %s attribute\n",                   \
 599                 __stringify(_name));                                    \
 600         return count;                                                   \
 601 }
 602
 603 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo);
 604 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read);
 605
 606 static void dev_set_t10_wwn_model_alias(struct se_device *dev)
 607 {
 608         const char *configname;
 609
 610         configname = config_item_name(&dev->dev_group.cg_item);
 611         if (strlen(configname) >= INQUIRY_MODEL_LEN) {
 612                 pr_warn("dev[%p]: Backstore name '%s' is too long for "
 613                         "INQUIRY_MODEL, truncating to 15 characters\n", dev,
 614                         configname);
 615         }
 616         /*
 617          * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1)
 618          * here without potentially breaking existing setups, so continue to
 619          * truncate one byte shorter than what can be carried in INQUIRY.
 620          */
 621         strlcpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN);
 622 }
 623
 624 static ssize_t emulate_model_alias_store(struct config_item *item,
 625                 const char *page, size_t count)
 626 {
 627         struct se_dev_attrib *da = to_attrib(item);
 628         struct se_device *dev = da->da_dev;
 629         bool flag;
 630         int ret;
 631
 632         if (dev->export_count) {
 633                 pr_err("dev[%p]: Unable to change model alias"
 634                         " while export_count is %d\n",
 635                         dev, dev->export_count);
 636                 return -EINVAL;
 637         }
 638
 639         ret = strtobool(page, &flag);
 640         if (ret < 0)
 641                 return ret;
 642
 643         BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
 644         if (flag) {
 645                 dev_set_t10_wwn_model_alias(dev);
 646         } else {
 647                 strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod,
 648                         sizeof(dev->t10_wwn.model));
 649         }
 650         da->emulate_model_alias = flag;
 651         return count;
 652 }
 653
 654 static ssize_t emulate_write_cache_store(struct config_item *item,
 655                 const char *page, size_t count)
 656 {
 657         struct se_dev_attrib *da = to_attrib(item);
 658         bool flag;
 659         int ret;
 660
 661         ret = strtobool(page, &flag);
 662         if (ret < 0)
 663                 return ret;
 664
 665         if (flag && da->da_dev->transport->get_write_cache) {
 666                 pr_err("emulate_write_cache not supported for this device\n");
 667                 return -EINVAL;
 668         }
 669
 670         da->emulate_write_cache = flag;
 671         pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
 672                         da->da_dev, flag);
 673         return count;
 674 }
 675
 676 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item,
 677                 const char *page, size_t count)
 678 {
 679         struct se_dev_attrib *da = to_attrib(item);
 680         u32 val;
 681         int ret;
 682
 683         ret = kstrtou32(page, 0, &val);
 684         if (ret < 0)
 685                 return ret;
 686
 687         if (val != TARGET_UA_INTLCK_CTRL_CLEAR
 688          && val != TARGET_UA_INTLCK_CTRL_NO_CLEAR
 689          && val != TARGET_UA_INTLCK_CTRL_ESTABLISH_UA) {
 690                 pr_err("Illegal value %d\n", val);
 691                 return -EINVAL;
 692         }
 693
 694         if (da->da_dev->export_count) {
 695                 pr_err("dev[%p]: Unable to change SE Device"
 696                         " UA_INTRLCK_CTRL while export_count is %d\n",
 697                         da->da_dev, da->da_dev->export_count);
 698                 return -EINVAL;
 699         }
 700         da->emulate_ua_intlck_ctrl = val;
 701         pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
 702                 da->da_dev, val);
 703         return count;
 704 }
 705
 706 static ssize_t emulate_tas_store(struct config_item *item,
 707                 const char *page, size_t count)
 708 {
 709         struct se_dev_attrib *da = to_attrib(item);
 710         bool flag;
 711         int ret;
 712
 713         ret = strtobool(page, &flag);
 714         if (ret < 0)
 715                 return ret;
 716
 717         if (da->da_dev->export_count) {
 718                 pr_err("dev[%p]: Unable to change SE Device TAS while"
 719                         " export_count is %d\n",
 720                         da->da_dev, da->da_dev->export_count);
 721                 return -EINVAL;
 722         }
 723         da->emulate_tas = flag;
 724         pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
 725                 da->da_dev, flag ? "Enabled" : "Disabled");
 726
 727         return count;
 728 }
 729
 730 static ssize_t emulate_tpu_store(struct config_item *item,
 731                 const char *page, size_t count)
 732 {
 733         struct se_dev_attrib *da = to_attrib(item);
 734         bool flag;
 735         int ret;
 736
 737         ret = strtobool(page, &flag);
 738         if (ret < 0)
 739                 return ret;
 740
 741         /*
 742          * We expect this value to be non-zero when generic Block Layer
 743          * Discard supported is detected iblock_create_virtdevice().
 744          */
 745         if (flag && !da->max_unmap_block_desc_count) {
 746                 pr_err("Generic Block Discard not supported\n");
 747                 return -ENOSYS;
 748         }
 749
 750         da->emulate_tpu = flag;
 751         pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
 752                 da->da_dev, flag);
 753         return count;
 754 }
 755
 756 static ssize_t emulate_tpws_store(struct config_item *item,
 757                 const char *page, size_t count)
 758 {
 759         struct se_dev_attrib *da = to_attrib(item);
 760         bool flag;
 761         int ret;
 762
 763         ret = strtobool(page, &flag);
 764         if (ret < 0)
 765                 return ret;
 766
 767         /*
 768          * We expect this value to be non-zero when generic Block Layer
 769          * Discard supported is detected iblock_create_virtdevice().
 770          */
 771         if (flag && !da->max_unmap_block_desc_count) {
 772                 pr_err("Generic Block Discard not supported\n");
 773                 return -ENOSYS;
 774         }
 775
 776         da->emulate_tpws = flag;
 777         pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
 778                                 da->da_dev, flag);
 779         return count;
 780 }
 781
 782 static ssize_t pi_prot_type_store(struct config_item *item,
 783                 const char *page, size_t count)
 784 {
 785         struct se_dev_attrib *da = to_attrib(item);
 786         int old_prot = da->pi_prot_type, ret;
 787         struct se_device *dev = da->da_dev;
 788         u32 flag;
 789
 790         ret = kstrtou32(page, 0, &flag);
 791         if (ret < 0)
 792                 return ret;
 793
 794         if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
 795                 pr_err("Illegal value %d for pi_prot_type\n", flag);
 796                 return -EINVAL;
 797         }
 798         if (flag == 2) {
 799                 pr_err("DIF TYPE2 protection currently not supported\n");
 800                 return -ENOSYS;
 801         }
 802         if (da->hw_pi_prot_type) {
 803                 pr_warn("DIF protection enabled on underlying hardware,"
 804                         " ignoring\n");
 805                 return count;
 806         }
 807         if (!dev->transport->init_prot || !dev->transport->free_prot) {
 808                 /* 0 is only allowed value for non-supporting backends */
 809                 if (flag == 0)
 810                         return count;
 811
 812                 pr_err("DIF protection not supported by backend: %s\n",
 813                        dev->transport->name);
 814                 return -ENOSYS;
 815         }
 816         if (!target_dev_configured(dev)) {
 817                 pr_err("DIF protection requires device to be configured\n");
 818                 return -ENODEV;
 819         }
 820         if (dev->export_count) {
 821                 pr_err("dev[%p]: Unable to change SE Device PROT type while"
 822                        " export_count is %d\n", dev, dev->export_count);
 823                 return -EINVAL;
 824         }
 825
 826         da->pi_prot_type = flag;
 827
 828         if (flag && !old_prot) {
 829                 ret = dev->transport->init_prot(dev);
 830                 if (ret) {
 831                         da->pi_prot_type = old_prot;
 832                         da->pi_prot_verify = (bool) da->pi_prot_type;
 833                         return ret;
 834                 }
 835
 836         } else if (!flag && old_prot) {
 837                 dev->transport->free_prot(dev);
 838         }
 839
 840         da->pi_prot_verify = (bool) da->pi_prot_type;
 841         pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
 842         return count;
 843 }
 844
 845 /* always zero, but attr needs to remain RW to avoid userspace breakage */
 846 static ssize_t pi_prot_format_show(struct config_item *item, char *page)
 847 {
 848         return snprintf(page, PAGE_SIZE, "0\n");
 849 }
 850
 851 static ssize_t pi_prot_format_store(struct config_item *item,
 852                 const char *page, size_t count)
 853 {
 854         struct se_dev_attrib *da = to_attrib(item);
 855         struct se_device *dev = da->da_dev;
 856         bool flag;
 857         int ret;
 858
 859         ret = strtobool(page, &flag);
 860         if (ret < 0)
 861                 return ret;
 862
 863         if (!flag)
 864                 return count;
 865
 866         if (!dev->transport->format_prot) {
 867                 pr_err("DIF protection format not supported by backend %s\n",
 868                        dev->transport->name);
 869                 return -ENOSYS;
 870         }
 871         if (!target_dev_configured(dev)) {
 872                 pr_err("DIF protection format requires device to be configured\n");
 873                 return -ENODEV;
 874         }
 875         if (dev->export_count) {
 876                 pr_err("dev[%p]: Unable to format SE Device PROT type while"
 877                        " export_count is %d\n", dev, dev->export_count);
 878                 return -EINVAL;
 879         }
 880
 881         ret = dev->transport->format_prot(dev);
 882         if (ret)
 883                 return ret;
 884
 885         pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
 886         return count;
 887 }
 888
 889 static ssize_t pi_prot_verify_store(struct config_item *item,
 890                 const char *page, size_t count)
 891 {
 892         struct se_dev_attrib *da = to_attrib(item);
 893         bool flag;
 894         int ret;
 895
 896         ret = strtobool(page, &flag);
 897         if (ret < 0)
 898                 return ret;
 899
 900         if (!flag) {
 901                 da->pi_prot_verify = flag;
 902                 return count;
 903         }
 904         if (da->hw_pi_prot_type) {
 905                 pr_warn("DIF protection enabled on underlying hardware,"
 906                         " ignoring\n");
 907                 return count;
 908         }
 909         if (!da->pi_prot_type) {
 910                 pr_warn("DIF protection not supported by backend, ignoring\n");
 911                 return count;
 912         }
 913         da->pi_prot_verify = flag;
 914
 915         return count;
 916 }
 917
 918 static ssize_t force_pr_aptpl_store(struct config_item *item,
 919                 const char *page, size_t count)
 920 {
 921         struct se_dev_attrib *da = to_attrib(item);
 922         bool flag;
 923         int ret;
 924
 925         ret = strtobool(page, &flag);
 926         if (ret < 0)
 927                 return ret;
 928         if (da->da_dev->export_count) {
 929                 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
 930                        " export_count is %d\n",
 931                        da->da_dev, da->da_dev->export_count);
 932                 return -EINVAL;
 933         }
 934
 935         da->force_pr_aptpl = flag;
 936         pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag);
 937         return count;
 938 }
 939
 940 static ssize_t emulate_rest_reord_store(struct config_item *item,
 941                 const char *page, size_t count)
 942 {
 943         struct se_dev_attrib *da = to_attrib(item);
 944         bool flag;
 945         int ret;
 946
 947         ret = strtobool(page, &flag);
 948         if (ret < 0)
 949                 return ret;
 950
 951         if (flag != 0) {
 952                 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted"
 953                         " reordering not implemented\n", da->da_dev);
 954                 return -ENOSYS;
 955         }
 956         da->emulate_rest_reord = flag;
 957         pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
 958                 da->da_dev, flag);
 959         return count;
 960 }
 961
 962 static ssize_t unmap_zeroes_data_store(struct config_item *item,
 963                 const char *page, size_t count)
 964 {
 965         struct se_dev_attrib *da = to_attrib(item);
 966         bool flag;
 967         int ret;
 968
 969         ret = strtobool(page, &flag);
 970         if (ret < 0)
 971                 return ret;
 972
 973         if (da->da_dev->export_count) {
 974                 pr_err("dev[%p]: Unable to change SE Device"
 975                        " unmap_zeroes_data while export_count is %d\n",
 976                        da->da_dev, da->da_dev->export_count);
 977                 return -EINVAL;
 978         }
 979         /*
 980          * We expect this value to be non-zero when generic Block Layer
 981          * Discard supported is detected iblock_configure_device().
 982          */
 983         if (flag && !da->max_unmap_block_desc_count) {
 984                 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set"
 985                        " because max_unmap_block_desc_count is zero\n",
 986                        da->da_dev);
 987                 return -ENOSYS;
 988         }
 989         da->unmap_zeroes_data = flag;
 990         pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n",
 991                  da->da_dev, flag);
 992         return count;
 993 }
 994
 995 /*
 996  * Note, this can only be called on unexported SE Device Object.
 997  */
 998 static ssize_t queue_depth_store(struct config_item *item,
 999                 const char *page, size_t count)
1000 {
1001         struct se_dev_attrib *da = to_attrib(item);
1002         struct se_device *dev = da->da_dev;
1003         u32 val;
1004         int ret;
1005
1006         ret = kstrtou32(page, 0, &val);
1007         if (ret < 0)
1008                 return ret;
1009
1010         if (dev->export_count) {
1011                 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1012                         " export_count is %d\n",
1013                         dev, dev->export_count);
1014                 return -EINVAL;
1015         }
1016         if (!val) {
1017                 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
1018                 return -EINVAL;
1019         }
1020
1021         if (val > dev->dev_attrib.queue_depth) {
1022                 if (val > dev->dev_attrib.hw_queue_depth) {
1023                         pr_err("dev[%p]: Passed queue_depth:"
1024                                 " %u exceeds TCM/SE_Device MAX"
1025                                 " TCQ: %u\n", dev, val,
1026                                 dev->dev_attrib.hw_queue_depth);
1027                         return -EINVAL;
1028                 }
1029         }
1030         da->queue_depth = dev->queue_depth = val;
1031         pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val);
1032         return count;
1033 }
1034
1035 static ssize_t optimal_sectors_store(struct config_item *item,
1036                 const char *page, size_t count)
1037 {
1038         struct se_dev_attrib *da = to_attrib(item);
1039         u32 val;
1040         int ret;
1041
1042         ret = kstrtou32(page, 0, &val);
1043         if (ret < 0)
1044                 return ret;
1045
1046         if (da->da_dev->export_count) {
1047                 pr_err("dev[%p]: Unable to change SE Device"
1048                         " optimal_sectors while export_count is %d\n",
1049                         da->da_dev, da->da_dev->export_count);
1050                 return -EINVAL;
1051         }
1052         if (val > da->hw_max_sectors) {
1053                 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1054                         " greater than hw_max_sectors: %u\n",
1055                         da->da_dev, val, da->hw_max_sectors);
1056                 return -EINVAL;
1057         }
1058
1059         da->optimal_sectors = val;
1060         pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1061                         da->da_dev, val);
1062         return count;
1063 }
1064
1065 static ssize_t block_size_store(struct config_item *item,
1066                 const char *page, size_t count)
1067 {
1068         struct se_dev_attrib *da = to_attrib(item);
1069         u32 val;
1070         int ret;
1071
1072         ret = kstrtou32(page, 0, &val);
1073         if (ret < 0)
1074                 return ret;
1075
1076         if (da->da_dev->export_count) {
1077                 pr_err("dev[%p]: Unable to change SE Device block_size"
1078                         " while export_count is %d\n",
1079                         da->da_dev, da->da_dev->export_count);
1080                 return -EINVAL;
1081         }
1082
1083         if (val != 512 && val != 1024 && val != 2048 && val != 4096) {
1084                 pr_err("dev[%p]: Illegal value for block_device: %u"
1085                         " for SE device, must be 512, 1024, 2048 or 4096\n",
1086                         da->da_dev, val);
1087                 return -EINVAL;
1088         }
1089
1090         da->block_size = val;
1091         if (da->max_bytes_per_io)
1092                 da->hw_max_sectors = da->max_bytes_per_io / val;
1093
1094         pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1095                         da->da_dev, val);
1096         return count;
1097 }
1098
1099 static ssize_t alua_support_show(struct config_item *item, char *page)
1100 {
1101         struct se_dev_attrib *da = to_attrib(item);
1102         u8 flags = da->da_dev->transport_flags;
1103
1104         return snprintf(page, PAGE_SIZE, "%d\n",
1105                         flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1);
1106 }
1107
1108 static ssize_t alua_support_store(struct config_item *item,
1109                 const char *page, size_t count)
1110 {
1111         struct se_dev_attrib *da = to_attrib(item);
1112         struct se_device *dev = da->da_dev;
1113         bool flag;
1114         int ret;
1115
1116         if (!(dev->transport->transport_flags_changeable &
1117               TRANSPORT_FLAG_PASSTHROUGH_ALUA)) {
1118                 pr_err("dev[%p]: Unable to change SE Device alua_support:"
1119                         " alua_support has fixed value\n", dev);
1120                 return -EINVAL;
1121         }
1122
1123         ret = strtobool(page, &flag);
1124         if (ret < 0)
1125                 return ret;
1126
1127         if (flag)
1128                 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_ALUA;
1129         else
1130                 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_ALUA;
1131         return count;
1132 }
1133
1134 static ssize_t pgr_support_show(struct config_item *item, char *page)
1135 {
1136         struct se_dev_attrib *da = to_attrib(item);
1137         u8 flags = da->da_dev->transport_flags;
1138
1139         return snprintf(page, PAGE_SIZE, "%d\n",
1140                         flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1);
1141 }
1142
1143 static ssize_t pgr_support_store(struct config_item *item,
1144                 const char *page, size_t count)
1145 {
1146         struct se_dev_attrib *da = to_attrib(item);
1147         struct se_device *dev = da->da_dev;
1148         bool flag;
1149         int ret;
1150
1151         if (!(dev->transport->transport_flags_changeable &
1152               TRANSPORT_FLAG_PASSTHROUGH_PGR)) {
1153                 pr_err("dev[%p]: Unable to change SE Device pgr_support:"
1154                         " pgr_support has fixed value\n", dev);
1155                 return -EINVAL;
1156         }
1157
1158         ret = strtobool(page, &flag);
1159         if (ret < 0)
1160                 return ret;
1161
1162         if (flag)
1163                 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_PGR;
1164         else
1165                 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_PGR;
1166         return count;
1167 }
1168
1169 CONFIGFS_ATTR(, emulate_model_alias);
1170 CONFIGFS_ATTR(, emulate_dpo);
1171 CONFIGFS_ATTR(, emulate_fua_write);
1172 CONFIGFS_ATTR(, emulate_fua_read);
1173 CONFIGFS_ATTR(, emulate_write_cache);
1174 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl);
1175 CONFIGFS_ATTR(, emulate_tas);
1176 CONFIGFS_ATTR(, emulate_tpu);
1177 CONFIGFS_ATTR(, emulate_tpws);
1178 CONFIGFS_ATTR(, emulate_caw);
1179 CONFIGFS_ATTR(, emulate_3pc);
1180 CONFIGFS_ATTR(, emulate_pr);
1181 CONFIGFS_ATTR(, pi_prot_type);
1182 CONFIGFS_ATTR_RO(, hw_pi_prot_type);
1183 CONFIGFS_ATTR(, pi_prot_format);
1184 CONFIGFS_ATTR(, pi_prot_verify);
1185 CONFIGFS_ATTR(, enforce_pr_isids);
1186 CONFIGFS_ATTR(, is_nonrot);
1187 CONFIGFS_ATTR(, emulate_rest_reord);
1188 CONFIGFS_ATTR(, force_pr_aptpl);
1189 CONFIGFS_ATTR_RO(, hw_block_size);
1190 CONFIGFS_ATTR(, block_size);
1191 CONFIGFS_ATTR_RO(, hw_max_sectors);
1192 CONFIGFS_ATTR(, optimal_sectors);
1193 CONFIGFS_ATTR_RO(, hw_queue_depth);
1194 CONFIGFS_ATTR(, queue_depth);
1195 CONFIGFS_ATTR(, max_unmap_lba_count);
1196 CONFIGFS_ATTR(, max_unmap_block_desc_count);
1197 CONFIGFS_ATTR(, unmap_granularity);
1198 CONFIGFS_ATTR(, unmap_granularity_alignment);
1199 CONFIGFS_ATTR(, unmap_zeroes_data);
1200 CONFIGFS_ATTR(, max_write_same_len);
1201 CONFIGFS_ATTR(, alua_support);
1202 CONFIGFS_ATTR(, pgr_support);
1203
1204 /*
1205  * dev_attrib attributes for devices using the target core SBC/SPC
1206  * interpreter.  Any backend using spc_parse_cdb should be using
1207  * these.
1208  */
1209 struct configfs_attribute *sbc_attrib_attrs[] = {
1210         &attr_emulate_model_alias,
1211         &attr_emulate_dpo,
1212         &attr_emulate_fua_write,
1213         &attr_emulate_fua_read,
1214         &attr_emulate_write_cache,
1215         &attr_emulate_ua_intlck_ctrl,
1216         &attr_emulate_tas,
1217         &attr_emulate_tpu,
1218         &attr_emulate_tpws,
1219         &attr_emulate_caw,
1220         &attr_emulate_3pc,
1221         &attr_emulate_pr,
1222         &attr_pi_prot_type,
1223         &attr_hw_pi_prot_type,
1224         &attr_pi_prot_format,
1225         &attr_pi_prot_verify,
1226         &attr_enforce_pr_isids,
1227         &attr_is_nonrot,
1228         &attr_emulate_rest_reord,
1229         &attr_force_pr_aptpl,
1230         &attr_hw_block_size,
1231         &attr_block_size,
1232         &attr_hw_max_sectors,
1233         &attr_optimal_sectors,
1234         &attr_hw_queue_depth,
1235         &attr_queue_depth,
1236         &attr_max_unmap_lba_count,
1237         &attr_max_unmap_block_desc_count,
1238         &attr_unmap_granularity,
1239         &attr_unmap_granularity_alignment,
1240         &attr_unmap_zeroes_data,
1241         &attr_max_write_same_len,
1242         &attr_alua_support,
1243         &attr_pgr_support,
1244         NULL,
1245 };
1246 EXPORT_SYMBOL(sbc_attrib_attrs);
1247
1248 /*
1249  * Minimal dev_attrib attributes for devices passing through CDBs.
1250  * In this case we only provide a few read-only attributes for
1251  * backwards compatibility.
1252  */
1253 struct configfs_attribute *passthrough_attrib_attrs[] = {
1254         &attr_hw_pi_prot_type,
1255         &attr_hw_block_size,
1256         &attr_hw_max_sectors,
1257         &attr_hw_queue_depth,
1258         &attr_emulate_pr,
1259         &attr_alua_support,
1260         &attr_pgr_support,
1261         NULL,
1262 };
1263 EXPORT_SYMBOL(passthrough_attrib_attrs);
1264
1265 /*
1266  * pr related dev_attrib attributes for devices passing through CDBs,
1267  * but allowing in core pr emulation.
1268  */
1269 struct configfs_attribute *passthrough_pr_attrib_attrs[] = {
1270         &attr_enforce_pr_isids,
1271         &attr_force_pr_aptpl,
1272         NULL,
1273 };
1274 EXPORT_SYMBOL(passthrough_pr_attrib_attrs);
1275
1276 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL);
1277 TB_CIT_SETUP_DRV(dev_action, NULL, NULL);
1278
1279 /* End functions for struct config_item_type tb_dev_attrib_cit */
1280
1281 /*  Start functions for struct config_item_type tb_dev_wwn_cit */
1282
1283 static struct t10_wwn *to_t10_wwn(struct config_item *item)
1284 {
1285         return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group);
1286 }
1287
1288 static ssize_t target_check_inquiry_data(char *buf)
1289 {
1290         size_t len;
1291         int i;
1292
1293         len = strlen(buf);
1294
1295         /*
1296          * SPC 4.3.1:
1297          * ASCII data fields shall contain only ASCII printable characters
1298          * (i.e., code values 20h to 7Eh) and may be terminated with one or
1299          * more ASCII null (00h) characters.
1300          */
1301         for (i = 0; i < len; i++) {
1302                 if (buf[i] < 0x20 || buf[i] > 0x7E) {
1303                         pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n");
1304                         return -EINVAL;
1305                 }
1306         }
1307
1308         return len;
1309 }
1310
1311 /*
1312  * STANDARD and VPD page 0x83 T10 Vendor Identification
1313  */
1314 static ssize_t target_wwn_vendor_id_show(struct config_item *item,
1315                 char *page)
1316 {
1317         return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]);
1318 }
1319
1320 static ssize_t target_wwn_vendor_id_store(struct config_item *item,
1321                 const char *page, size_t count)
1322 {
1323         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1324         struct se_device *dev = t10_wwn->t10_dev;
1325         /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1326         unsigned char buf[INQUIRY_VENDOR_LEN + 2];
1327         char *stripped = NULL;
1328         size_t len;
1329         ssize_t ret;
1330
1331         len = strlcpy(buf, page, sizeof(buf));
1332         if (len < sizeof(buf)) {
1333                 /* Strip any newline added from userspace. */
1334                 stripped = strstrip(buf);
1335                 len = strlen(stripped);
1336         }
1337         if (len > INQUIRY_VENDOR_LEN) {
1338                 pr_err("Emulated T10 Vendor Identification exceeds"
1339                         " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN)
1340                         "\n");
1341                 return -EOVERFLOW;
1342         }
1343
1344         ret = target_check_inquiry_data(stripped);
1345
1346         if (ret < 0)
1347                 return ret;
1348
1349         /*
1350          * Check to see if any active exports exist.  If they do exist, fail
1351          * here as changing this information on the fly (underneath the
1352          * initiator side OS dependent multipath code) could cause negative
1353          * effects.
1354          */
1355         if (dev->export_count) {
1356                 pr_err("Unable to set T10 Vendor Identification while"
1357                         " active %d exports exist\n", dev->export_count);
1358                 return -EINVAL;
1359         }
1360
1361         BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1);
1362         strlcpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor));
1363
1364         pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:"
1365                  " %s\n", dev->t10_wwn.vendor);
1366
1367         return count;
1368 }
1369
1370 static ssize_t target_wwn_product_id_show(struct config_item *item,
1371                 char *page)
1372 {
1373         return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]);
1374 }
1375
1376 static ssize_t target_wwn_product_id_store(struct config_item *item,
1377                 const char *page, size_t count)
1378 {
1379         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1380         struct se_device *dev = t10_wwn->t10_dev;
1381         /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1382         unsigned char buf[INQUIRY_MODEL_LEN + 2];
1383         char *stripped = NULL;
1384         size_t len;
1385         ssize_t ret;
1386
1387         len = strlcpy(buf, page, sizeof(buf));
1388         if (len < sizeof(buf)) {
1389                 /* Strip any newline added from userspace. */
1390                 stripped = strstrip(buf);
1391                 len = strlen(stripped);
1392         }
1393         if (len > INQUIRY_MODEL_LEN) {
1394                 pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: "
1395                          __stringify(INQUIRY_MODEL_LEN)
1396                         "\n");
1397                 return -EOVERFLOW;
1398         }
1399
1400         ret = target_check_inquiry_data(stripped);
1401
1402         if (ret < 0)
1403                 return ret;
1404
1405         /*
1406          * Check to see if any active exports exist.  If they do exist, fail
1407          * here as changing this information on the fly (underneath the
1408          * initiator side OS dependent multipath code) could cause negative
1409          * effects.
1410          */
1411         if (dev->export_count) {
1412                 pr_err("Unable to set T10 Model while active %d exports exist\n",
1413                         dev->export_count);
1414                 return -EINVAL;
1415         }
1416
1417         BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
1418         strlcpy(dev->t10_wwn.model, stripped, sizeof(dev->t10_wwn.model));
1419
1420         pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n",
1421                  dev->t10_wwn.model);
1422
1423         return count;
1424 }
1425
1426 static ssize_t target_wwn_revision_show(struct config_item *item,
1427                 char *page)
1428 {
1429         return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]);
1430 }
1431
1432 static ssize_t target_wwn_revision_store(struct config_item *item,
1433                 const char *page, size_t count)
1434 {
1435         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1436         struct se_device *dev = t10_wwn->t10_dev;
1437         /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1438         unsigned char buf[INQUIRY_REVISION_LEN + 2];
1439         char *stripped = NULL;
1440         size_t len;
1441         ssize_t ret;
1442
1443         len = strlcpy(buf, page, sizeof(buf));
1444         if (len < sizeof(buf)) {
1445                 /* Strip any newline added from userspace. */
1446                 stripped = strstrip(buf);
1447                 len = strlen(stripped);
1448         }
1449         if (len > INQUIRY_REVISION_LEN) {
1450                 pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: "
1451                          __stringify(INQUIRY_REVISION_LEN)
1452                         "\n");
1453                 return -EOVERFLOW;
1454         }
1455
1456         ret = target_check_inquiry_data(stripped);
1457
1458         if (ret < 0)
1459                 return ret;
1460
1461         /*
1462          * Check to see if any active exports exist.  If they do exist, fail
1463          * here as changing this information on the fly (underneath the
1464          * initiator side OS dependent multipath code) could cause negative
1465          * effects.
1466          */
1467         if (dev->export_count) {
1468                 pr_err("Unable to set T10 Revision while active %d exports exist\n",
1469                         dev->export_count);
1470                 return -EINVAL;
1471         }
1472
1473         BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1);
1474         strlcpy(dev->t10_wwn.revision, stripped, sizeof(dev->t10_wwn.revision));
1475
1476         pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n",
1477                  dev->t10_wwn.revision);
1478
1479         return count;
1480 }
1481
1482 /*
1483  * VPD page 0x80 Unit serial
1484  */
1485 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item,
1486                 char *page)
1487 {
1488         return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1489                 &to_t10_wwn(item)->unit_serial[0]);
1490 }
1491
1492 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item,
1493                 const char *page, size_t count)
1494 {
1495         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1496         struct se_device *dev = t10_wwn->t10_dev;
1497         unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
1498
1499         /*
1500          * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1501          * from the struct scsi_device level firmware, do not allow
1502          * VPD Unit Serial to be emulated.
1503          *
1504          * Note this struct scsi_device could also be emulating VPD
1505          * information from its drivers/scsi LLD.  But for now we assume
1506          * it is doing 'the right thing' wrt a world wide unique
1507          * VPD Unit Serial Number that OS dependent multipath can depend on.
1508          */
1509         if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
1510                 pr_err("Underlying SCSI device firmware provided VPD"
1511                         " Unit Serial, ignoring request\n");
1512                 return -EOPNOTSUPP;
1513         }
1514
1515         if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
1516                 pr_err("Emulated VPD Unit Serial exceeds"
1517                 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1518                 return -EOVERFLOW;
1519         }
1520         /*
1521          * Check to see if any active $FABRIC_MOD exports exist.  If they
1522          * do exist, fail here as changing this information on the fly
1523          * (underneath the initiator side OS dependent multipath code)
1524          * could cause negative effects.
1525          */
1526         if (dev->export_count) {
1527                 pr_err("Unable to set VPD Unit Serial while"
1528                         " active %d $FABRIC_MOD exports exist\n",
1529                         dev->export_count);
1530                 return -EINVAL;
1531         }
1532
1533         /*
1534          * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1535          *
1536          * Also, strip any newline added from the userspace
1537          * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1538          */
1539         memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
1540         snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
1541         snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
1542                         "%s", strstrip(buf));
1543         dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
1544
1545         pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1546                         " %s\n", dev->t10_wwn.unit_serial);
1547
1548         return count;
1549 }
1550
1551 /*
1552  * VPD page 0x83 Protocol Identifier
1553  */
1554 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item,
1555                 char *page)
1556 {
1557         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1558         struct t10_vpd *vpd;
1559         unsigned char buf[VPD_TMP_BUF_SIZE];
1560         ssize_t len = 0;
1561
1562         memset(buf, 0, VPD_TMP_BUF_SIZE);
1563
1564         spin_lock(&t10_wwn->t10_vpd_lock);
1565         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
1566                 if (!vpd->protocol_identifier_set)
1567                         continue;
1568
1569                 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1570
1571                 if (len + strlen(buf) >= PAGE_SIZE)
1572                         break;
1573
1574                 len += sprintf(page+len, "%s", buf);
1575         }
1576         spin_unlock(&t10_wwn->t10_vpd_lock);
1577
1578         return len;
1579 }
1580
1581 /*
1582  * Generic wrapper for dumping VPD identifiers by association.
1583  */
1584 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc)                           \
1585 static ssize_t target_wwn_##_name##_show(struct config_item *item,      \
1586                 char *page)                                             \
1587 {                                                                       \
1588         struct t10_wwn *t10_wwn = to_t10_wwn(item);                     \
1589         struct t10_vpd *vpd;                                            \
1590         unsigned char buf[VPD_TMP_BUF_SIZE];                            \
1591         ssize_t len = 0;                                                \
1592                                                                         \
1593         spin_lock(&t10_wwn->t10_vpd_lock);                              \
1594         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {    \
1595                 if (vpd->association != _assoc)                         \
1596                         continue;                                       \
1597                                                                         \
1598                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
1599                 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE);   \
1600                 if (len + strlen(buf) >= PAGE_SIZE)                     \
1601                         break;                                          \
1602                 len += sprintf(page+len, "%s", buf);                    \
1603                                                                         \
1604                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
1605                 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1606                 if (len + strlen(buf) >= PAGE_SIZE)                     \
1607                         break;                                          \
1608                 len += sprintf(page+len, "%s", buf);                    \
1609                                                                         \
1610                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
1611                 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1612                 if (len + strlen(buf) >= PAGE_SIZE)                     \
1613                         break;                                          \
1614                 len += sprintf(page+len, "%s", buf);                    \
1615         }                                                               \
1616         spin_unlock(&t10_wwn->t10_vpd_lock);                            \
1617                                                                         \
1618         return len;                                                     \
1619 }
1620
1621 /* VPD page 0x83 Association: Logical Unit */
1622 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1623 /* VPD page 0x83 Association: Target Port */
1624 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1625 /* VPD page 0x83 Association: SCSI Target Device */
1626 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1627
1628 CONFIGFS_ATTR(target_wwn_, vendor_id);
1629 CONFIGFS_ATTR(target_wwn_, product_id);
1630 CONFIGFS_ATTR(target_wwn_, revision);
1631 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial);
1632 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier);
1633 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit);
1634 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port);
1635 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device);
1636
1637 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1638         &target_wwn_attr_vendor_id,
1639         &target_wwn_attr_product_id,
1640         &target_wwn_attr_revision,
1641         &target_wwn_attr_vpd_unit_serial,
1642         &target_wwn_attr_vpd_protocol_identifier,
1643         &target_wwn_attr_vpd_assoc_logical_unit,
1644         &target_wwn_attr_vpd_assoc_target_port,
1645         &target_wwn_attr_vpd_assoc_scsi_target_device,
1646         NULL,
1647 };
1648
1649 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs);
1650
1651 /*  End functions for struct config_item_type tb_dev_wwn_cit */
1652
1653 /*  Start functions for struct config_item_type tb_dev_pr_cit */
1654
1655 static struct se_device *pr_to_dev(struct config_item *item)
1656 {
1657         return container_of(to_config_group(item), struct se_device,
1658                         dev_pr_group);
1659 }
1660
1661 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1662                 char *page)
1663 {
1664         struct se_node_acl *se_nacl;
1665         struct t10_pr_registration *pr_reg;
1666         char i_buf[PR_REG_ISID_ID_LEN];
1667
1668         memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1669
1670         pr_reg = dev->dev_pr_res_holder;
1671         if (!pr_reg)
1672                 return sprintf(page, "No SPC-3 Reservation holder\n");
1673
1674         se_nacl = pr_reg->pr_reg_nacl;
1675         core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1676
1677         return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1678                 se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1679                 se_nacl->initiatorname, i_buf);
1680 }
1681
1682 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1683                 char *page)
1684 {
1685         struct se_session *sess = dev->reservation_holder;
1686         struct se_node_acl *se_nacl;
1687         ssize_t len;
1688
1689         if (sess) {
1690                 se_nacl = sess->se_node_acl;
1691                 len = sprintf(page,
1692                               "SPC-2 Reservation: %s Initiator: %s\n",
1693                               se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1694                               se_nacl->initiatorname);
1695         } else {
1696                 len = sprintf(page, "No SPC-2 Reservation holder\n");
1697         }
1698         return len;
1699 }
1700
1701 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page)
1702 {
1703         struct se_device *dev = pr_to_dev(item);
1704         int ret;
1705
1706         if (!dev->dev_attrib.emulate_pr)
1707                 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1708
1709         if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1710                 return sprintf(page, "Passthrough\n");
1711
1712         spin_lock(&dev->dev_reservation_lock);
1713         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1714                 ret = target_core_dev_pr_show_spc2_res(dev, page);
1715         else
1716                 ret = target_core_dev_pr_show_spc3_res(dev, page);
1717         spin_unlock(&dev->dev_reservation_lock);
1718         return ret;
1719 }
1720
1721 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item,
1722                 char *page)
1723 {
1724         struct se_device *dev = pr_to_dev(item);
1725         ssize_t len = 0;
1726
1727         spin_lock(&dev->dev_reservation_lock);
1728         if (!dev->dev_pr_res_holder) {
1729                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1730         } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1731                 len = sprintf(page, "SPC-3 Reservation: All Target"
1732                         " Ports registration\n");
1733         } else {
1734                 len = sprintf(page, "SPC-3 Reservation: Single"
1735                         " Target Port registration\n");
1736         }
1737
1738         spin_unlock(&dev->dev_reservation_lock);
1739         return len;
1740 }
1741
1742 static ssize_t target_pr_res_pr_generation_show(struct config_item *item,
1743                 char *page)
1744 {
1745         return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation);
1746 }
1747
1748
1749 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item,
1750                 char *page)
1751 {
1752         struct se_device *dev = pr_to_dev(item);
1753         struct se_node_acl *se_nacl;
1754         struct se_portal_group *se_tpg;
1755         struct t10_pr_registration *pr_reg;
1756         const struct target_core_fabric_ops *tfo;
1757         ssize_t len = 0;
1758
1759         spin_lock(&dev->dev_reservation_lock);
1760         pr_reg = dev->dev_pr_res_holder;
1761         if (!pr_reg) {
1762                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1763                 goto out_unlock;
1764         }
1765
1766         se_nacl = pr_reg->pr_reg_nacl;
1767         se_tpg = se_nacl->se_tpg;
1768         tfo = se_tpg->se_tpg_tfo;
1769
1770         len += sprintf(page+len, "SPC-3 Reservation: %s"
1771                 " Target Node Endpoint: %s\n", tfo->fabric_name,
1772                 tfo->tpg_get_wwn(se_tpg));
1773         len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1774                 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1775                 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
1776                 tfo->fabric_name, tfo->tpg_get_tag(se_tpg),
1777                 tfo->fabric_name, pr_reg->pr_aptpl_target_lun);
1778
1779 out_unlock:
1780         spin_unlock(&dev->dev_reservation_lock);
1781         return len;
1782 }
1783
1784
1785 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item,
1786                 char *page)
1787 {
1788         struct se_device *dev = pr_to_dev(item);
1789         const struct target_core_fabric_ops *tfo;
1790         struct t10_pr_registration *pr_reg;
1791         unsigned char buf[384];
1792         char i_buf[PR_REG_ISID_ID_LEN];
1793         ssize_t len = 0;
1794         int reg_count = 0;
1795
1796         len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1797
1798         spin_lock(&dev->t10_pr.registration_lock);
1799         list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1800                         pr_reg_list) {
1801
1802                 memset(buf, 0, 384);
1803                 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1804                 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1805                 core_pr_dump_initiator_port(pr_reg, i_buf,
1806                                         PR_REG_ISID_ID_LEN);
1807                 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1808                         tfo->fabric_name,
1809                         pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1810                         pr_reg->pr_res_generation);
1811
1812                 if (len + strlen(buf) >= PAGE_SIZE)
1813                         break;
1814
1815                 len += sprintf(page+len, "%s", buf);
1816                 reg_count++;
1817         }
1818         spin_unlock(&dev->t10_pr.registration_lock);
1819
1820         if (!reg_count)
1821                 len += sprintf(page+len, "None\n");
1822
1823         return len;
1824 }
1825
1826 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page)
1827 {
1828         struct se_device *dev = pr_to_dev(item);
1829         struct t10_pr_registration *pr_reg;
1830         ssize_t len = 0;
1831
1832         spin_lock(&dev->dev_reservation_lock);
1833         pr_reg = dev->dev_pr_res_holder;
1834         if (pr_reg) {
1835                 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1836                         core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1837         } else {
1838                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1839         }
1840
1841         spin_unlock(&dev->dev_reservation_lock);
1842         return len;
1843 }
1844
1845 static ssize_t target_pr_res_type_show(struct config_item *item, char *page)
1846 {
1847         struct se_device *dev = pr_to_dev(item);
1848
1849         if (!dev->dev_attrib.emulate_pr)
1850                 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1851         if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1852                 return sprintf(page, "SPC_PASSTHROUGH\n");
1853         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1854                 return sprintf(page, "SPC2_RESERVATIONS\n");
1855
1856         return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1857 }
1858
1859 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item,
1860                 char *page)
1861 {
1862         struct se_device *dev = pr_to_dev(item);
1863
1864         if (!dev->dev_attrib.emulate_pr ||
1865             (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1866                 return 0;
1867
1868         return sprintf(page, "APTPL Bit Status: %s\n",
1869                 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1870 }
1871
1872 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item,
1873                 char *page)
1874 {
1875         struct se_device *dev = pr_to_dev(item);
1876
1877         if (!dev->dev_attrib.emulate_pr ||
1878             (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1879                 return 0;
1880
1881         return sprintf(page, "Ready to process PR APTPL metadata..\n");
1882 }
1883
1884 enum {
1885         Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1886         Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1887         Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1888         Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1889 };
1890
1891 static match_table_t tokens = {
1892         {Opt_initiator_fabric, "initiator_fabric=%s"},
1893         {Opt_initiator_node, "initiator_node=%s"},
1894         {Opt_initiator_sid, "initiator_sid=%s"},
1895         {Opt_sa_res_key, "sa_res_key=%s"},
1896         {Opt_res_holder, "res_holder=%d"},
1897         {Opt_res_type, "res_type=%d"},
1898         {Opt_res_scope, "res_scope=%d"},
1899         {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1900         {Opt_mapped_lun, "mapped_lun=%u"},
1901         {Opt_target_fabric, "target_fabric=%s"},
1902         {Opt_target_node, "target_node=%s"},
1903         {Opt_tpgt, "tpgt=%d"},
1904         {Opt_port_rtpi, "port_rtpi=%d"},
1905         {Opt_target_lun, "target_lun=%u"},
1906         {Opt_err, NULL}
1907 };
1908
1909 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item,
1910                 const char *page, size_t count)
1911 {
1912         struct se_device *dev = pr_to_dev(item);
1913         unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1914         unsigned char *t_fabric = NULL, *t_port = NULL;
1915         char *orig, *ptr, *opts;
1916         substring_t args[MAX_OPT_ARGS];
1917         unsigned long long tmp_ll;
1918         u64 sa_res_key = 0;
1919         u64 mapped_lun = 0, target_lun = 0;
1920         int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1921         u16 tpgt = 0;
1922         u8 type = 0;
1923
1924         if (!dev->dev_attrib.emulate_pr ||
1925             (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1926                 return count;
1927         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1928                 return count;
1929
1930         if (dev->export_count) {
1931                 pr_debug("Unable to process APTPL metadata while"
1932                         " active fabric exports exist\n");
1933                 return -EINVAL;
1934         }
1935
1936         opts = kstrdup(page, GFP_KERNEL);
1937         if (!opts)
1938                 return -ENOMEM;
1939
1940         orig = opts;
1941         while ((ptr = strsep(&opts, ",\n")) != NULL) {
1942                 if (!*ptr)
1943                         continue;
1944
1945                 token = match_token(ptr, tokens, args);
1946                 switch (token) {
1947                 case Opt_initiator_fabric:
1948                         i_fabric = match_strdup(args);
1949                         if (!i_fabric) {
1950                                 ret = -ENOMEM;
1951                                 goto out;
1952                         }
1953                         break;
1954                 case Opt_initiator_node:
1955                         i_port = match_strdup(args);
1956                         if (!i_port) {
1957                                 ret = -ENOMEM;
1958                                 goto out;
1959                         }
1960                         if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1961                                 pr_err("APTPL metadata initiator_node="
1962                                         " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1963                                         PR_APTPL_MAX_IPORT_LEN);
1964                                 ret = -EINVAL;
1965                                 break;
1966                         }
1967                         break;
1968                 case Opt_initiator_sid:
1969                         isid = match_strdup(args);
1970                         if (!isid) {
1971                                 ret = -ENOMEM;
1972                                 goto out;
1973                         }
1974                         if (strlen(isid) >= PR_REG_ISID_LEN) {
1975                                 pr_err("APTPL metadata initiator_isid"
1976                                         "= exceeds PR_REG_ISID_LEN: %d\n",
1977                                         PR_REG_ISID_LEN);
1978                                 ret = -EINVAL;
1979                                 break;
1980                         }
1981                         break;
1982                 case Opt_sa_res_key:
1983                         ret = match_u64(args,  &tmp_ll);
1984                         if (ret < 0) {
1985                                 pr_err("kstrtoull() failed for sa_res_key=\n");
1986                                 goto out;
1987                         }
1988                         sa_res_key = (u64)tmp_ll;
1989                         break;
1990                 /*
1991                  * PR APTPL Metadata for Reservation
1992                  */
1993                 case Opt_res_holder:
1994                         ret = match_int(args, &arg);
1995                         if (ret)
1996                                 goto out;
1997                         res_holder = arg;
1998                         break;
1999                 case Opt_res_type:
2000                         ret = match_int(args, &arg);
2001                         if (ret)
2002                                 goto out;
2003                         type = (u8)arg;
2004                         break;
2005                 case Opt_res_scope:
2006                         ret = match_int(args, &arg);
2007                         if (ret)
2008                                 goto out;
2009                         break;
2010                 case Opt_res_all_tg_pt:
2011                         ret = match_int(args, &arg);
2012                         if (ret)
2013                                 goto out;
2014                         all_tg_pt = (int)arg;
2015                         break;
2016                 case Opt_mapped_lun:
2017                         ret = match_u64(args, &tmp_ll);
2018                         if (ret)
2019                                 goto out;
2020                         mapped_lun = (u64)tmp_ll;
2021                         break;
2022                 /*
2023                  * PR APTPL Metadata for Target Port
2024                  */
2025                 case Opt_target_fabric:
2026                         t_fabric = match_strdup(args);
2027                         if (!t_fabric) {
2028                                 ret = -ENOMEM;
2029                                 goto out;
2030                         }
2031                         break;
2032                 case Opt_target_node:
2033                         t_port = match_strdup(args);
2034                         if (!t_port) {
2035                                 ret = -ENOMEM;
2036                                 goto out;
2037                         }
2038                         if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
2039                                 pr_err("APTPL metadata target_node="
2040                                         " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
2041                                         PR_APTPL_MAX_TPORT_LEN);
2042                                 ret = -EINVAL;
2043                                 break;
2044                         }
2045                         break;
2046                 case Opt_tpgt:
2047                         ret = match_int(args, &arg);
2048                         if (ret)
2049                                 goto out;
2050                         tpgt = (u16)arg;
2051                         break;
2052                 case Opt_port_rtpi:
2053                         ret = match_int(args, &arg);
2054                         if (ret)
2055                                 goto out;
2056                         break;
2057                 case Opt_target_lun:
2058                         ret = match_u64(args, &tmp_ll);
2059                         if (ret)
2060                                 goto out;
2061                         target_lun = (u64)tmp_ll;
2062                         break;
2063                 default:
2064                         break;
2065                 }
2066         }
2067
2068         if (!i_port || !t_port || !sa_res_key) {
2069                 pr_err("Illegal parameters for APTPL registration\n");
2070                 ret = -EINVAL;
2071                 goto out;
2072         }
2073
2074         if (res_holder && !(type)) {
2075                 pr_err("Illegal PR type: 0x%02x for reservation"
2076                                 " holder\n", type);
2077                 ret = -EINVAL;
2078                 goto out;
2079         }
2080
2081         ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
2082                         i_port, isid, mapped_lun, t_port, tpgt, target_lun,
2083                         res_holder, all_tg_pt, type);
2084 out:
2085         kfree(i_fabric);
2086         kfree(i_port);
2087         kfree(isid);
2088         kfree(t_fabric);
2089         kfree(t_port);
2090         kfree(orig);
2091         return (ret == 0) ? count : ret;
2092 }
2093
2094
2095 CONFIGFS_ATTR_RO(target_pr_, res_holder);
2096 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts);
2097 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation);
2098 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port);
2099 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts);
2100 CONFIGFS_ATTR_RO(target_pr_, res_pr_type);
2101 CONFIGFS_ATTR_RO(target_pr_, res_type);
2102 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active);
2103 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata);
2104
2105 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
2106         &target_pr_attr_res_holder,
2107         &target_pr_attr_res_pr_all_tgt_pts,
2108         &target_pr_attr_res_pr_generation,
2109         &target_pr_attr_res_pr_holder_tg_port,
2110         &target_pr_attr_res_pr_registered_i_pts,
2111         &target_pr_attr_res_pr_type,
2112         &target_pr_attr_res_type,
2113         &target_pr_attr_res_aptpl_active,
2114         &target_pr_attr_res_aptpl_metadata,
2115         NULL,
2116 };
2117
2118 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs);
2119
2120 /*  End functions for struct config_item_type tb_dev_pr_cit */
2121
2122 /*  Start functions for struct config_item_type tb_dev_cit */
2123
2124 static inline struct se_device *to_device(struct config_item *item)
2125 {
2126         return container_of(to_config_group(item), struct se_device, dev_group);
2127 }
2128
2129 static ssize_t target_dev_info_show(struct config_item *item, char *page)
2130 {
2131         struct se_device *dev = to_device(item);
2132         int bl = 0;
2133         ssize_t read_bytes = 0;
2134
2135         transport_dump_dev_state(dev, page, &bl);
2136         read_bytes += bl;
2137         read_bytes += dev->transport->show_configfs_dev_params(dev,
2138                         page+read_bytes);
2139         return read_bytes;
2140 }
2141
2142 static ssize_t target_dev_control_store(struct config_item *item,
2143                 const char *page, size_t count)
2144 {
2145         struct se_device *dev = to_device(item);
2146
2147         return dev->transport->set_configfs_dev_params(dev, page, count);
2148 }
2149
2150 static ssize_t target_dev_alias_show(struct config_item *item, char *page)
2151 {
2152         struct se_device *dev = to_device(item);
2153
2154         if (!(dev->dev_flags & DF_USING_ALIAS))
2155                 return 0;
2156
2157         return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
2158 }
2159
2160 static ssize_t target_dev_alias_store(struct config_item *item,
2161                 const char *page, size_t count)
2162 {
2163         struct se_device *dev = to_device(item);
2164         struct se_hba *hba = dev->se_hba;
2165         ssize_t read_bytes;
2166
2167         if (count > (SE_DEV_ALIAS_LEN-1)) {
2168                 pr_err("alias count: %d exceeds"
2169                         " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
2170                         SE_DEV_ALIAS_LEN-1);
2171                 return -EINVAL;
2172         }
2173
2174         read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
2175         if (!read_bytes)
2176                 return -EINVAL;
2177         if (dev->dev_alias[read_bytes - 1] == '\n')
2178                 dev->dev_alias[read_bytes - 1] = '\0';
2179
2180         dev->dev_flags |= DF_USING_ALIAS;
2181
2182         pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
2183                 config_item_name(&hba->hba_group.cg_item),
2184                 config_item_name(&dev->dev_group.cg_item),
2185                 dev->dev_alias);
2186
2187         return read_bytes;
2188 }
2189
2190 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page)
2191 {
2192         struct se_device *dev = to_device(item);
2193
2194         if (!(dev->dev_flags & DF_USING_UDEV_PATH))
2195                 return 0;
2196
2197         return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
2198 }
2199
2200 static ssize_t target_dev_udev_path_store(struct config_item *item,
2201                 const char *page, size_t count)
2202 {
2203         struct se_device *dev = to_device(item);
2204         struct se_hba *hba = dev->se_hba;
2205         ssize_t read_bytes;
2206
2207         if (count > (SE_UDEV_PATH_LEN-1)) {
2208                 pr_err("udev_path count: %d exceeds"
2209                         " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
2210                         SE_UDEV_PATH_LEN-1);
2211                 return -EINVAL;
2212         }
2213
2214         read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
2215                         "%s", page);
2216         if (!read_bytes)
2217                 return -EINVAL;
2218         if (dev->udev_path[read_bytes - 1] == '\n')
2219                 dev->udev_path[read_bytes - 1] = '\0';
2220
2221         dev->dev_flags |= DF_USING_UDEV_PATH;
2222
2223         pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
2224                 config_item_name(&hba->hba_group.cg_item),
2225                 config_item_name(&dev->dev_group.cg_item),
2226                 dev->udev_path);
2227
2228         return read_bytes;
2229 }
2230
2231 static ssize_t target_dev_enable_show(struct config_item *item, char *page)
2232 {
2233         struct se_device *dev = to_device(item);
2234
2235         return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev));
2236 }
2237
2238 static ssize_t target_dev_enable_store(struct config_item *item,
2239                 const char *page, size_t count)
2240 {
2241         struct se_device *dev = to_device(item);
2242         char *ptr;
2243         int ret;
2244
2245         ptr = strstr(page, "1");
2246         if (!ptr) {
2247                 pr_err("For dev_enable ops, only valid value"
2248                                 " is \"1\"\n");
2249                 return -EINVAL;
2250         }
2251
2252         ret = target_configure_device(dev);
2253         if (ret)
2254                 return ret;
2255         return count;
2256 }
2257
2258 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page)
2259 {
2260         struct se_device *dev = to_device(item);
2261         struct config_item *lu_ci;
2262         struct t10_alua_lu_gp *lu_gp;
2263         struct t10_alua_lu_gp_member *lu_gp_mem;
2264         ssize_t len = 0;
2265
2266         lu_gp_mem = dev->dev_alua_lu_gp_mem;
2267         if (!lu_gp_mem)
2268                 return 0;
2269
2270         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2271         lu_gp = lu_gp_mem->lu_gp;
2272         if (lu_gp) {
2273                 lu_ci = &lu_gp->lu_gp_group.cg_item;
2274                 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
2275                         config_item_name(lu_ci), lu_gp->lu_gp_id);
2276         }
2277         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2278
2279         return len;
2280 }
2281
2282 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item,
2283                 const char *page, size_t count)
2284 {
2285         struct se_device *dev = to_device(item);
2286         struct se_hba *hba = dev->se_hba;
2287         struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
2288         struct t10_alua_lu_gp_member *lu_gp_mem;
2289         unsigned char buf[LU_GROUP_NAME_BUF];
2290         int move = 0;
2291
2292         lu_gp_mem = dev->dev_alua_lu_gp_mem;
2293         if (!lu_gp_mem)
2294                 return count;
2295
2296         if (count > LU_GROUP_NAME_BUF) {
2297                 pr_err("ALUA LU Group Alias too large!\n");
2298                 return -EINVAL;
2299         }
2300         memset(buf, 0, LU_GROUP_NAME_BUF);
2301         memcpy(buf, page, count);
2302         /*
2303          * Any ALUA logical unit alias besides "NULL" means we will be
2304          * making a new group association.
2305          */
2306         if (strcmp(strstrip(buf), "NULL")) {
2307                 /*
2308                  * core_alua_get_lu_gp_by_name() will increment reference to
2309                  * struct t10_alua_lu_gp.  This reference is released with
2310                  * core_alua_get_lu_gp_by_name below().
2311                  */
2312                 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
2313                 if (!lu_gp_new)
2314                         return -ENODEV;
2315         }
2316
2317         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2318         lu_gp = lu_gp_mem->lu_gp;
2319         if (lu_gp) {
2320                 /*
2321                  * Clearing an existing lu_gp association, and replacing
2322                  * with NULL
2323                  */
2324                 if (!lu_gp_new) {
2325                         pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
2326                                 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
2327                                 " %hu\n",
2328                                 config_item_name(&hba->hba_group.cg_item),
2329                                 config_item_name(&dev->dev_group.cg_item),
2330                                 config_item_name(&lu_gp->lu_gp_group.cg_item),
2331                                 lu_gp->lu_gp_id);
2332
2333                         __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2334                         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2335
2336                         return count;
2337                 }
2338                 /*
2339                  * Removing existing association of lu_gp_mem with lu_gp
2340                  */
2341                 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2342                 move = 1;
2343         }
2344         /*
2345          * Associate lu_gp_mem with lu_gp_new.
2346          */
2347         __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
2348         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2349
2350         pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
2351                 " core/alua/lu_gps/%s, ID: %hu\n",
2352                 (move) ? "Moving" : "Adding",
2353                 config_item_name(&hba->hba_group.cg_item),
2354                 config_item_name(&dev->dev_group.cg_item),
2355                 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
2356                 lu_gp_new->lu_gp_id);
2357
2358         core_alua_put_lu_gp_from_name(lu_gp_new);
2359         return count;
2360 }
2361
2362 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page)
2363 {
2364         struct se_device *dev = to_device(item);
2365         struct t10_alua_lba_map *map;
2366         struct t10_alua_lba_map_member *mem;
2367         char *b = page;
2368         int bl = 0;
2369         char state;
2370
2371         spin_lock(&dev->t10_alua.lba_map_lock);
2372         if (!list_empty(&dev->t10_alua.lba_map_list))
2373             bl += sprintf(b + bl, "%u %u\n",
2374                           dev->t10_alua.lba_map_segment_size,
2375                           dev->t10_alua.lba_map_segment_multiplier);
2376         list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
2377                 bl += sprintf(b + bl, "%llu %llu",
2378                               map->lba_map_first_lba, map->lba_map_last_lba);
2379                 list_for_each_entry(mem, &map->lba_map_mem_list,
2380                                     lba_map_mem_list) {
2381                         switch (mem->lba_map_mem_alua_state) {
2382                         case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
2383                                 state = 'O';
2384                                 break;
2385                         case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
2386                                 state = 'A';
2387                                 break;
2388                         case ALUA_ACCESS_STATE_STANDBY:
2389                                 state = 'S';
2390                                 break;
2391                         case ALUA_ACCESS_STATE_UNAVAILABLE:
2392                                 state = 'U';
2393                                 break;
2394                         default:
2395                                 state = '.';
2396                                 break;
2397                         }
2398                         bl += sprintf(b + bl, " %d:%c",
2399                                       mem->lba_map_mem_alua_pg_id, state);
2400                 }
2401                 bl += sprintf(b + bl, "\n");
2402         }
2403         spin_unlock(&dev->t10_alua.lba_map_lock);
2404         return bl;
2405 }
2406
2407 static ssize_t target_dev_lba_map_store(struct config_item *item,
2408                 const char *page, size_t count)
2409 {
2410         struct se_device *dev = to_device(item);
2411         struct t10_alua_lba_map *lba_map = NULL;
2412         struct list_head lba_list;
2413         char *map_entries, *orig, *ptr;
2414         char state;
2415         int pg_num = -1, pg;
2416         int ret = 0, num = 0, pg_id, alua_state;
2417         unsigned long start_lba = -1, end_lba = -1;
2418         unsigned long segment_size = -1, segment_mult = -1;
2419
2420         orig = map_entries = kstrdup(page, GFP_KERNEL);
2421         if (!map_entries)
2422                 return -ENOMEM;
2423
2424         INIT_LIST_HEAD(&lba_list);
2425         while ((ptr = strsep(&map_entries, "\n")) != NULL) {
2426                 if (!*ptr)
2427                         continue;
2428
2429                 if (num == 0) {
2430                         if (sscanf(ptr, "%lu %lu\n",
2431                                    &segment_size, &segment_mult) != 2) {
2432                                 pr_err("Invalid line %d\n", num);
2433                                 ret = -EINVAL;
2434                                 break;
2435                         }
2436                         num++;
2437                         continue;
2438                 }
2439                 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2440                         pr_err("Invalid line %d\n", num);
2441                         ret = -EINVAL;
2442                         break;
2443                 }
2444                 ptr = strchr(ptr, ' ');
2445                 if (!ptr) {
2446                         pr_err("Invalid line %d, missing end lba\n", num);
2447                         ret = -EINVAL;
2448                         break;
2449                 }
2450                 ptr++;
2451                 ptr = strchr(ptr, ' ');
2452                 if (!ptr) {
2453                         pr_err("Invalid line %d, missing state definitions\n",
2454                                num);
2455                         ret = -EINVAL;
2456                         break;
2457                 }
2458                 ptr++;
2459                 lba_map = core_alua_allocate_lba_map(&lba_list,
2460                                                      start_lba, end_lba);
2461                 if (IS_ERR(lba_map)) {
2462                         ret = PTR_ERR(lba_map);
2463                         break;
2464                 }
2465                 pg = 0;
2466                 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2467                         switch (state) {
2468                         case 'O':
2469                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2470                                 break;
2471                         case 'A':
2472                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2473                                 break;
2474                         case 'S':
2475                                 alua_state = ALUA_ACCESS_STATE_STANDBY;
2476                                 break;
2477                         case 'U':
2478                                 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2479                                 break;
2480                         default:
2481                                 pr_err("Invalid ALUA state '%c'\n", state);
2482                                 ret = -EINVAL;
2483                                 goto out;
2484                         }
2485
2486                         ret = core_alua_allocate_lba_map_mem(lba_map,
2487                                                              pg_id, alua_state);
2488                         if (ret) {
2489                                 pr_err("Invalid target descriptor %d:%c "
2490                                        "at line %d\n",
2491                                        pg_id, state, num);
2492                                 break;
2493                         }
2494                         pg++;
2495                         ptr = strchr(ptr, ' ');
2496                         if (ptr)
2497                                 ptr++;
2498                         else
2499                                 break;
2500                 }
2501                 if (pg_num == -1)
2502                     pg_num = pg;
2503                 else if (pg != pg_num) {
2504                         pr_err("Only %d from %d port groups definitions "
2505                                "at line %d\n", pg, pg_num, num);
2506                         ret = -EINVAL;
2507                         break;
2508                 }
2509                 num++;
2510         }
2511 out:
2512         if (ret) {
2513                 core_alua_free_lba_map(&lba_list);
2514                 count = ret;
2515         } else
2516                 core_alua_set_lba_map(dev, &lba_list,
2517                                       segment_size, segment_mult);
2518         kfree(orig);
2519         return count;
2520 }
2521
2522 CONFIGFS_ATTR_RO(target_dev_, info);
2523 CONFIGFS_ATTR_WO(target_dev_, control);
2524 CONFIGFS_ATTR(target_dev_, alias);
2525 CONFIGFS_ATTR(target_dev_, udev_path);
2526 CONFIGFS_ATTR(target_dev_, enable);
2527 CONFIGFS_ATTR(target_dev_, alua_lu_gp);
2528 CONFIGFS_ATTR(target_dev_, lba_map);
2529
2530 static struct configfs_attribute *target_core_dev_attrs[] = {
2531         &target_dev_attr_info,
2532         &target_dev_attr_control,
2533         &target_dev_attr_alias,
2534         &target_dev_attr_udev_path,
2535         &target_dev_attr_enable,
2536         &target_dev_attr_alua_lu_gp,
2537         &target_dev_attr_lba_map,
2538         NULL,
2539 };
2540
2541 static void target_core_dev_release(struct config_item *item)
2542 {
2543         struct config_group *dev_cg = to_config_group(item);
2544         struct se_device *dev =
2545                 container_of(dev_cg, struct se_device, dev_group);
2546
2547         target_free_device(dev);
2548 }
2549
2550 /*
2551  * Used in target_core_fabric_configfs.c to verify valid se_device symlink
2552  * within target_fabric_port_link()
2553  */
2554 struct configfs_item_operations target_core_dev_item_ops = {
2555         .release                = target_core_dev_release,
2556 };
2557
2558 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2559
2560 /* End functions for struct config_item_type tb_dev_cit */
2561
2562 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2563
2564 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item)
2565 {
2566         return container_of(to_config_group(item), struct t10_alua_lu_gp,
2567                         lu_gp_group);
2568 }
2569
2570 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page)
2571 {
2572         struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2573
2574         if (!lu_gp->lu_gp_valid_id)
2575                 return 0;
2576         return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2577 }
2578
2579 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item,
2580                 const char *page, size_t count)
2581 {
2582         struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2583         struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2584         unsigned long lu_gp_id;
2585         int ret;
2586
2587         ret = kstrtoul(page, 0, &lu_gp_id);
2588         if (ret < 0) {
2589                 pr_err("kstrtoul() returned %d for"
2590                         " lu_gp_id\n", ret);
2591                 return ret;
2592         }
2593         if (lu_gp_id > 0x0000ffff) {
2594                 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2595                         " 0x0000ffff\n", lu_gp_id);
2596                 return -EINVAL;
2597         }
2598
2599         ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2600         if (ret < 0)
2601                 return -EINVAL;
2602
2603         pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2604                 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2605                 config_item_name(&alua_lu_gp_cg->cg_item),
2606                 lu_gp->lu_gp_id);
2607
2608         return count;
2609 }
2610
2611 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
2612 {
2613         struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2614         struct se_device *dev;
2615         struct se_hba *hba;
2616         struct t10_alua_lu_gp_member *lu_gp_mem;
2617         ssize_t len = 0, cur_len;
2618         unsigned char buf[LU_GROUP_NAME_BUF];
2619
2620         memset(buf, 0, LU_GROUP_NAME_BUF);
2621
2622         spin_lock(&lu_gp->lu_gp_lock);
2623         list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2624                 dev = lu_gp_mem->lu_gp_mem_dev;
2625                 hba = dev->se_hba;
2626
2627                 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2628                         config_item_name(&hba->hba_group.cg_item),
2629                         config_item_name(&dev->dev_group.cg_item));
2630                 cur_len++; /* Extra byte for NULL terminator */
2631
2632                 if ((cur_len + len) > PAGE_SIZE) {
2633                         pr_warn("Ran out of lu_gp_show_attr"
2634                                 "_members buffer\n");
2635                         break;
2636                 }
2637                 memcpy(page+len, buf, cur_len);
2638                 len += cur_len;
2639         }
2640         spin_unlock(&lu_gp->lu_gp_lock);
2641
2642         return len;
2643 }
2644
2645 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id);
2646 CONFIGFS_ATTR_RO(target_lu_gp_, members);
2647
2648 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2649         &target_lu_gp_attr_lu_gp_id,
2650         &target_lu_gp_attr_members,
2651         NULL,
2652 };
2653
2654 static void target_core_alua_lu_gp_release(struct config_item *item)
2655 {
2656         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2657                         struct t10_alua_lu_gp, lu_gp_group);
2658
2659         core_alua_free_lu_gp(lu_gp);
2660 }
2661
2662 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2663         .release                = target_core_alua_lu_gp_release,
2664 };
2665
2666 static const struct config_item_type target_core_alua_lu_gp_cit = {
2667         .ct_item_ops            = &target_core_alua_lu_gp_ops,
2668         .ct_attrs               = target_core_alua_lu_gp_attrs,
2669         .ct_owner               = THIS_MODULE,
2670 };
2671
2672 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2673
2674 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2675
2676 static struct config_group *target_core_alua_create_lu_gp(
2677         struct config_group *group,
2678         const char *name)
2679 {
2680         struct t10_alua_lu_gp *lu_gp;
2681         struct config_group *alua_lu_gp_cg = NULL;
2682         struct config_item *alua_lu_gp_ci = NULL;
2683
2684         lu_gp = core_alua_allocate_lu_gp(name, 0);
2685         if (IS_ERR(lu_gp))
2686                 return NULL;
2687
2688         alua_lu_gp_cg = &lu_gp->lu_gp_group;
2689         alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2690
2691         config_group_init_type_name(alua_lu_gp_cg, name,
2692                         &target_core_alua_lu_gp_cit);
2693
2694         pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2695                 " Group: core/alua/lu_gps/%s\n",
2696                 config_item_name(alua_lu_gp_ci));
2697
2698         return alua_lu_gp_cg;
2699
2700 }
2701
2702 static void target_core_alua_drop_lu_gp(
2703         struct config_group *group,
2704         struct config_item *item)
2705 {
2706         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2707                         struct t10_alua_lu_gp, lu_gp_group);
2708
2709         pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2710                 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2711                 config_item_name(item), lu_gp->lu_gp_id);
2712         /*
2713          * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2714          * -> target_core_alua_lu_gp_release()
2715          */
2716         config_item_put(item);
2717 }
2718
2719 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2720         .make_group             = &target_core_alua_create_lu_gp,
2721         .drop_item              = &target_core_alua_drop_lu_gp,
2722 };
2723
2724 static const struct config_item_type target_core_alua_lu_gps_cit = {
2725         .ct_item_ops            = NULL,
2726         .ct_group_ops           = &target_core_alua_lu_gps_group_ops,
2727         .ct_owner               = THIS_MODULE,
2728 };
2729
2730 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2731
2732 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2733
2734 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item)
2735 {
2736         return container_of(to_config_group(item), struct t10_alua_tg_pt_gp,
2737                         tg_pt_gp_group);
2738 }
2739
2740 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item,
2741                 char *page)
2742 {
2743         return sprintf(page, "%d\n",
2744                        to_tg_pt_gp(item)->tg_pt_gp_alua_access_state);
2745 }
2746
2747 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item,
2748                 const char *page, size_t count)
2749 {
2750         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2751         struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2752         unsigned long tmp;
2753         int new_state, ret;
2754
2755         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2756                 pr_err("Unable to do implicit ALUA on non valid"
2757                         " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2758                 return -EINVAL;
2759         }
2760         if (!target_dev_configured(dev)) {
2761                 pr_err("Unable to set alua_access_state while device is"
2762                        " not configured\n");
2763                 return -ENODEV;
2764         }
2765
2766         ret = kstrtoul(page, 0, &tmp);
2767         if (ret < 0) {
2768                 pr_err("Unable to extract new ALUA access state from"
2769                                 " %s\n", page);
2770                 return ret;
2771         }
2772         new_state = (int)tmp;
2773
2774         if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2775                 pr_err("Unable to process implicit configfs ALUA"
2776                         " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2777                 return -EINVAL;
2778         }
2779         if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2780             new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2781                 /* LBA DEPENDENT is only allowed with implicit ALUA */
2782                 pr_err("Unable to process implicit configfs ALUA transition"
2783                        " while explicit ALUA management is enabled\n");
2784                 return -EINVAL;
2785         }
2786
2787         ret = core_alua_do_port_transition(tg_pt_gp, dev,
2788                                         NULL, NULL, new_state, 0);
2789         return (!ret) ? count : -EINVAL;
2790 }
2791
2792 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item,
2793                 char *page)
2794 {
2795         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2796         return sprintf(page, "%s\n",
2797                 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2798 }
2799
2800 static ssize_t target_tg_pt_gp_alua_access_status_store(
2801                 struct config_item *item, const char *page, size_t count)
2802 {
2803         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2804         unsigned long tmp;
2805         int new_status, ret;
2806
2807         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2808                 pr_err("Unable to do set ALUA access status on non"
2809                         " valid tg_pt_gp ID: %hu\n",
2810                         tg_pt_gp->tg_pt_gp_valid_id);
2811                 return -EINVAL;
2812         }
2813
2814         ret = kstrtoul(page, 0, &tmp);
2815         if (ret < 0) {
2816                 pr_err("Unable to extract new ALUA access status"
2817                                 " from %s\n", page);
2818                 return ret;
2819         }
2820         new_status = (int)tmp;
2821
2822         if ((new_status != ALUA_STATUS_NONE) &&
2823             (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2824             (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2825                 pr_err("Illegal ALUA access status: 0x%02x\n",
2826                                 new_status);
2827                 return -EINVAL;
2828         }
2829
2830         tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2831         return count;
2832 }
2833
2834 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item,
2835                 char *page)
2836 {
2837         return core_alua_show_access_type(to_tg_pt_gp(item), page);
2838 }
2839
2840 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item,
2841                 const char *page, size_t count)
2842 {
2843         return core_alua_store_access_type(to_tg_pt_gp(item), page, count);
2844 }
2845
2846 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit)                          \
2847 static ssize_t target_tg_pt_gp_alua_support_##_name##_show(             \
2848                 struct config_item *item, char *p)                      \
2849 {                                                                       \
2850         struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item);                \
2851         return sprintf(p, "%d\n",                                       \
2852                 !!(t->tg_pt_gp_alua_supported_states & _bit));          \
2853 }                                                                       \
2854                                                                         \
2855 static ssize_t target_tg_pt_gp_alua_support_##_name##_store(            \
2856                 struct config_item *item, const char *p, size_t c)      \
2857 {                                                                       \
2858         struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item);                \
2859         unsigned long tmp;                                              \
2860         int ret;                                                        \
2861                                                                         \
2862         if (!t->tg_pt_gp_valid_id) {                                    \
2863                 pr_err("Unable to do set " #_name " ALUA state on non"  \
2864                        " valid tg_pt_gp ID: %hu\n",                     \
2865                        t->tg_pt_gp_valid_id);                           \
2866                 return -EINVAL;                                         \
2867         }                                                               \
2868                                                                         \
2869         ret = kstrtoul(p, 0, &tmp);                                     \
2870         if (ret < 0) {                                                  \
2871                 pr_err("Invalid value '%s', must be '0' or '1'\n", p);  \
2872                 return -EINVAL;                                         \
2873         }                                                               \
2874         if (tmp > 1) {                                                  \
2875                 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2876                 return -EINVAL;                                         \
2877         }                                                               \
2878         if (tmp)                                                        \
2879                 t->tg_pt_gp_alua_supported_states |= _bit;              \
2880         else                                                            \
2881                 t->tg_pt_gp_alua_supported_states &= ~_bit;             \
2882                                                                         \
2883         return c;                                                       \
2884 }
2885
2886 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP);
2887 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP);
2888 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP);
2889 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP);
2890 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP);
2891 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP);
2892 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP);
2893
2894 static ssize_t target_tg_pt_gp_alua_write_metadata_show(
2895                 struct config_item *item, char *page)
2896 {
2897         return sprintf(page, "%d\n",
2898                 to_tg_pt_gp(item)->tg_pt_gp_write_metadata);
2899 }
2900
2901 static ssize_t target_tg_pt_gp_alua_write_metadata_store(
2902                 struct config_item *item, const char *page, size_t count)
2903 {
2904         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2905         unsigned long tmp;
2906         int ret;
2907
2908         ret = kstrtoul(page, 0, &tmp);
2909         if (ret < 0) {
2910                 pr_err("Unable to extract alua_write_metadata\n");
2911                 return ret;
2912         }
2913
2914         if ((tmp != 0) && (tmp != 1)) {
2915                 pr_err("Illegal value for alua_write_metadata:"
2916                         " %lu\n", tmp);
2917                 return -EINVAL;
2918         }
2919         tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2920
2921         return count;
2922 }
2923
2924 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item,
2925                 char *page)
2926 {
2927         return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page);
2928 }
2929
2930 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item,
2931                 const char *page, size_t count)
2932 {
2933         return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page,
2934                         count);
2935 }
2936
2937 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item,
2938                 char *page)
2939 {
2940         return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page);
2941 }
2942
2943 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item,
2944                 const char *page, size_t count)
2945 {
2946         return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page,
2947                         count);
2948 }
2949
2950 static ssize_t target_tg_pt_gp_implicit_trans_secs_show(
2951                 struct config_item *item, char *page)
2952 {
2953         return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page);
2954 }
2955
2956 static ssize_t target_tg_pt_gp_implicit_trans_secs_store(
2957                 struct config_item *item, const char *page, size_t count)
2958 {
2959         return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page,
2960                         count);
2961 }
2962
2963 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item,
2964                 char *page)
2965 {
2966         return core_alua_show_preferred_bit(to_tg_pt_gp(item), page);
2967 }
2968
2969 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item,
2970                 const char *page, size_t count)
2971 {
2972         return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count);
2973 }
2974
2975 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item,
2976                 char *page)
2977 {
2978         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2979
2980         if (!tg_pt_gp->tg_pt_gp_valid_id)
2981                 return 0;
2982         return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2983 }
2984
2985 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item,
2986                 const char *page, size_t count)
2987 {
2988         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2989         struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2990         unsigned long tg_pt_gp_id;
2991         int ret;
2992
2993         ret = kstrtoul(page, 0, &tg_pt_gp_id);
2994         if (ret < 0) {
2995                 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n",
2996                        page);
2997                 return ret;
2998         }
2999         if (tg_pt_gp_id > 0x0000ffff) {
3000                 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n",
3001                        tg_pt_gp_id);
3002                 return -EINVAL;
3003         }
3004
3005         ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
3006         if (ret < 0)
3007                 return -EINVAL;
3008
3009         pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
3010                 "core/alua/tg_pt_gps/%s to ID: %hu\n",
3011                 config_item_name(&alua_tg_pt_gp_cg->cg_item),
3012                 tg_pt_gp->tg_pt_gp_id);
3013
3014         return count;
3015 }
3016
3017 static ssize_t target_tg_pt_gp_members_show(struct config_item *item,
3018                 char *page)
3019 {
3020         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
3021         struct se_lun *lun;
3022         ssize_t len = 0, cur_len;
3023         unsigned char buf[TG_PT_GROUP_NAME_BUF];
3024
3025         memset(buf, 0, TG_PT_GROUP_NAME_BUF);
3026
3027         spin_lock(&tg_pt_gp->tg_pt_gp_lock);
3028         list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
3029                         lun_tg_pt_gp_link) {
3030                 struct se_portal_group *tpg = lun->lun_tpg;
3031
3032                 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
3033                         "/%s\n", tpg->se_tpg_tfo->fabric_name,
3034                         tpg->se_tpg_tfo->tpg_get_wwn(tpg),
3035                         tpg->se_tpg_tfo->tpg_get_tag(tpg),
3036                         config_item_name(&lun->lun_group.cg_item));
3037                 cur_len++; /* Extra byte for NULL terminator */
3038
3039                 if ((cur_len + len) > PAGE_SIZE) {
3040                         pr_warn("Ran out of lu_gp_show_attr"
3041                                 "_members buffer\n");
3042                         break;
3043                 }
3044                 memcpy(page+len, buf, cur_len);
3045                 len += cur_len;
3046         }
3047         spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
3048
3049         return len;
3050 }
3051
3052 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state);
3053 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status);
3054 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type);
3055 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning);
3056 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline);
3057 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent);
3058 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable);
3059 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby);
3060 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized);
3061 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized);
3062 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata);
3063 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs);
3064 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs);
3065 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs);
3066 CONFIGFS_ATTR(target_tg_pt_gp_, preferred);
3067 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id);
3068 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members);
3069
3070 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
3071         &target_tg_pt_gp_attr_alua_access_state,
3072         &target_tg_pt_gp_attr_alua_access_status,
3073         &target_tg_pt_gp_attr_alua_access_type,
3074         &target_tg_pt_gp_attr_alua_support_transitioning,
3075         &target_tg_pt_gp_attr_alua_support_offline,
3076         &target_tg_pt_gp_attr_alua_support_lba_dependent,
3077         &target_tg_pt_gp_attr_alua_support_unavailable,
3078         &target_tg_pt_gp_attr_alua_support_standby,
3079         &target_tg_pt_gp_attr_alua_support_active_nonoptimized,
3080         &target_tg_pt_gp_attr_alua_support_active_optimized,
3081         &target_tg_pt_gp_attr_alua_write_metadata,
3082         &target_tg_pt_gp_attr_nonop_delay_msecs,
3083         &target_tg_pt_gp_attr_trans_delay_msecs,
3084         &target_tg_pt_gp_attr_implicit_trans_secs,
3085         &target_tg_pt_gp_attr_preferred,
3086         &target_tg_pt_gp_attr_tg_pt_gp_id,
3087         &target_tg_pt_gp_attr_members,
3088         NULL,
3089 };
3090
3091 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
3092 {
3093         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3094                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3095
3096         core_alua_free_tg_pt_gp(tg_pt_gp);
3097 }
3098
3099 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
3100         .release                = target_core_alua_tg_pt_gp_release,
3101 };
3102
3103 static const struct config_item_type target_core_alua_tg_pt_gp_cit = {
3104         .ct_item_ops            = &target_core_alua_tg_pt_gp_ops,
3105         .ct_attrs               = target_core_alua_tg_pt_gp_attrs,
3106         .ct_owner               = THIS_MODULE,
3107 };
3108
3109 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
3110
3111 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3112
3113 static struct config_group *target_core_alua_create_tg_pt_gp(
3114         struct config_group *group,
3115         const char *name)
3116 {
3117         struct t10_alua *alua = container_of(group, struct t10_alua,
3118                                         alua_tg_pt_gps_group);
3119         struct t10_alua_tg_pt_gp *tg_pt_gp;
3120         struct config_group *alua_tg_pt_gp_cg = NULL;
3121         struct config_item *alua_tg_pt_gp_ci = NULL;
3122
3123         tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
3124         if (!tg_pt_gp)
3125                 return NULL;
3126
3127         alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
3128         alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
3129
3130         config_group_init_type_name(alua_tg_pt_gp_cg, name,
3131                         &target_core_alua_tg_pt_gp_cit);
3132
3133         pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
3134                 " Group: alua/tg_pt_gps/%s\n",
3135                 config_item_name(alua_tg_pt_gp_ci));
3136
3137         return alua_tg_pt_gp_cg;
3138 }
3139
3140 static void target_core_alua_drop_tg_pt_gp(
3141         struct config_group *group,
3142         struct config_item *item)
3143 {
3144         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3145                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3146
3147         pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
3148                 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
3149                 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
3150         /*
3151          * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
3152          * -> target_core_alua_tg_pt_gp_release().
3153          */
3154         config_item_put(item);
3155 }
3156
3157 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
3158         .make_group             = &target_core_alua_create_tg_pt_gp,
3159         .drop_item              = &target_core_alua_drop_tg_pt_gp,
3160 };
3161
3162 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
3163
3164 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3165
3166 /* Start functions for struct config_item_type target_core_alua_cit */
3167
3168 /*
3169  * target_core_alua_cit is a ConfigFS group that lives under
3170  * /sys/kernel/config/target/core/alua.  There are default groups
3171  * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
3172  * target_core_alua_cit in target_core_init_configfs() below.
3173  */
3174 static const struct config_item_type target_core_alua_cit = {
3175         .ct_item_ops            = NULL,
3176         .ct_attrs               = NULL,
3177         .ct_owner               = THIS_MODULE,
3178 };
3179
3180 /* End functions for struct config_item_type target_core_alua_cit */
3181
3182 /* Start functions for struct config_item_type tb_dev_stat_cit */
3183
3184 static struct config_group *target_core_stat_mkdir(
3185         struct config_group *group,
3186         const char *name)
3187 {
3188         return ERR_PTR(-ENOSYS);
3189 }
3190
3191 static void target_core_stat_rmdir(
3192         struct config_group *group,
3193         struct config_item *item)
3194 {
3195         return;
3196 }
3197
3198 static struct configfs_group_operations target_core_stat_group_ops = {
3199         .make_group             = &target_core_stat_mkdir,
3200         .drop_item              = &target_core_stat_rmdir,
3201 };
3202
3203 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
3204
3205 /* End functions for struct config_item_type tb_dev_stat_cit */
3206
3207 /* Start functions for struct config_item_type target_core_hba_cit */
3208
3209 static struct config_group *target_core_make_subdev(
3210         struct config_group *group,
3211         const char *name)
3212 {
3213         struct t10_alua_tg_pt_gp *tg_pt_gp;
3214         struct config_item *hba_ci = &group->cg_item;
3215         struct se_hba *hba = item_to_hba(hba_ci);
3216         struct target_backend *tb = hba->backend;
3217         struct se_device *dev;
3218         int errno = -ENOMEM, ret;
3219
3220         ret = mutex_lock_interruptible(&hba->hba_access_mutex);
3221         if (ret)
3222                 return ERR_PTR(ret);
3223
3224         dev = target_alloc_device(hba, name);
3225         if (!dev)
3226                 goto out_unlock;
3227
3228         config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit);
3229
3230         config_group_init_type_name(&dev->dev_action_group, "action",
3231                         &tb->tb_dev_action_cit);
3232         configfs_add_default_group(&dev->dev_action_group, &dev->dev_group);
3233
3234         config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
3235                         &tb->tb_dev_attrib_cit);
3236         configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group);
3237
3238         config_group_init_type_name(&dev->dev_pr_group, "pr",
3239                         &tb->tb_dev_pr_cit);
3240         configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group);
3241
3242         config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
3243                         &tb->tb_dev_wwn_cit);
3244         configfs_add_default_group(&dev->t10_wwn.t10_wwn_group,
3245                         &dev->dev_group);
3246
3247         config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
3248                         "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
3249         configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group,
3250                         &dev->dev_group);
3251
3252         config_group_init_type_name(&dev->dev_stat_grps.stat_group,
3253                         "statistics", &tb->tb_dev_stat_cit);
3254         configfs_add_default_group(&dev->dev_stat_grps.stat_group,
3255                         &dev->dev_group);
3256
3257         /*
3258          * Add core/$HBA/$DEV/alua/default_tg_pt_gp
3259          */
3260         tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
3261         if (!tg_pt_gp)
3262                 goto out_free_device;
3263         dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
3264
3265         config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
3266                         "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
3267         configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group,
3268                         &dev->t10_alua.alua_tg_pt_gps_group);
3269
3270         /*
3271          * Add core/$HBA/$DEV/statistics/ default groups
3272          */
3273         target_stat_setup_dev_default_groups(dev);
3274
3275         mutex_unlock(&hba->hba_access_mutex);
3276         return &dev->dev_group;
3277
3278 out_free_device:
3279         target_free_device(dev);
3280 out_unlock:
3281         mutex_unlock(&hba->hba_access_mutex);
3282         return ERR_PTR(errno);
3283 }
3284
3285 static void target_core_drop_subdev(
3286         struct config_group *group,
3287         struct config_item *item)
3288 {
3289         struct config_group *dev_cg = to_config_group(item);
3290         struct se_device *dev =
3291                 container_of(dev_cg, struct se_device, dev_group);
3292         struct se_hba *hba;
3293
3294         hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
3295
3296         mutex_lock(&hba->hba_access_mutex);
3297
3298         configfs_remove_default_groups(&dev->dev_stat_grps.stat_group);
3299         configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group);
3300
3301         /*
3302          * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
3303          * directly from target_core_alua_tg_pt_gp_release().
3304          */
3305         dev->t10_alua.default_tg_pt_gp = NULL;
3306
3307         configfs_remove_default_groups(dev_cg);
3308
3309         /*
3310          * se_dev is released from target_core_dev_item_ops->release()
3311          */
3312         config_item_put(item);
3313         mutex_unlock(&hba->hba_access_mutex);
3314 }
3315
3316 static struct configfs_group_operations target_core_hba_group_ops = {
3317         .make_group             = target_core_make_subdev,
3318         .drop_item              = target_core_drop_subdev,
3319 };
3320
3321
3322 static inline struct se_hba *to_hba(struct config_item *item)
3323 {
3324         return container_of(to_config_group(item), struct se_hba, hba_group);
3325 }
3326
3327 static ssize_t target_hba_info_show(struct config_item *item, char *page)
3328 {
3329         struct se_hba *hba = to_hba(item);
3330
3331         return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
3332                         hba->hba_id, hba->backend->ops->name,
3333                         TARGET_CORE_VERSION);
3334 }
3335
3336 static ssize_t target_hba_mode_show(struct config_item *item, char *page)
3337 {
3338         struct se_hba *hba = to_hba(item);
3339         int hba_mode = 0;
3340
3341         if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
3342                 hba_mode = 1;
3343
3344         return sprintf(page, "%d\n", hba_mode);
3345 }
3346
3347 static ssize_t target_hba_mode_store(struct config_item *item,
3348                 const char *page, size_t count)
3349 {
3350         struct se_hba *hba = to_hba(item);
3351         unsigned long mode_flag;
3352         int ret;
3353
3354         if (hba->backend->ops->pmode_enable_hba == NULL)
3355                 return -EINVAL;
3356
3357         ret = kstrtoul(page, 0, &mode_flag);
3358         if (ret < 0) {
3359                 pr_err("Unable to extract hba mode flag: %d\n", ret);
3360                 return ret;
3361         }
3362
3363         if (hba->dev_count) {
3364                 pr_err("Unable to set hba_mode with active devices\n");
3365                 return -EINVAL;
3366         }
3367
3368         ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
3369         if (ret < 0)
3370                 return -EINVAL;
3371         if (ret > 0)
3372                 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3373         else if (ret == 0)
3374                 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3375
3376         return count;
3377 }
3378
3379 CONFIGFS_ATTR_RO(target_, hba_info);
3380 CONFIGFS_ATTR(target_, hba_mode);
3381
3382 static void target_core_hba_release(struct config_item *item)
3383 {
3384         struct se_hba *hba = container_of(to_config_group(item),
3385                                 struct se_hba, hba_group);
3386         core_delete_hba(hba);
3387 }
3388
3389 static struct configfs_attribute *target_core_hba_attrs[] = {
3390         &target_attr_hba_info,
3391         &target_attr_hba_mode,
3392         NULL,
3393 };
3394
3395 static struct configfs_item_operations target_core_hba_item_ops = {
3396         .release                = target_core_hba_release,
3397 };
3398
3399 static const struct config_item_type target_core_hba_cit = {
3400         .ct_item_ops            = &target_core_hba_item_ops,
3401         .ct_group_ops           = &target_core_hba_group_ops,
3402         .ct_attrs               = target_core_hba_attrs,
3403         .ct_owner               = THIS_MODULE,
3404 };
3405
3406 static struct config_group *target_core_call_addhbatotarget(
3407         struct config_group *group,
3408         const char *name)
3409 {
3410         char *se_plugin_str, *str, *str2;
3411         struct se_hba *hba;
3412         char buf[TARGET_CORE_NAME_MAX_LEN];
3413         unsigned long plugin_dep_id = 0;
3414         int ret;
3415
3416         memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3417         if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3418                 pr_err("Passed *name strlen(): %d exceeds"
3419                         " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3420                         TARGET_CORE_NAME_MAX_LEN);
3421                 return ERR_PTR(-ENAMETOOLONG);
3422         }
3423         snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3424
3425         str = strstr(buf, "_");
3426         if (!str) {
3427                 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3428                 return ERR_PTR(-EINVAL);
3429         }
3430         se_plugin_str = buf;
3431         /*
3432          * Special case for subsystem plugins that have "_" in their names.
3433          * Namely rd_direct and rd_mcp..
3434          */
3435         str2 = strstr(str+1, "_");
3436         if (str2) {
3437                 *str2 = '\0'; /* Terminate for *se_plugin_str */
3438                 str2++; /* Skip to start of plugin dependent ID */
3439                 str = str2;
3440         } else {
3441                 *str = '\0'; /* Terminate for *se_plugin_str */
3442                 str++; /* Skip to start of plugin dependent ID */
3443         }
3444
3445         ret = kstrtoul(str, 0, &plugin_dep_id);
3446         if (ret < 0) {
3447                 pr_err("kstrtoul() returned %d for"
3448                                 " plugin_dep_id\n", ret);
3449                 return ERR_PTR(ret);
3450         }
3451         /*
3452          * Load up TCM subsystem plugins if they have not already been loaded.
3453          */
3454         transport_subsystem_check_init();
3455
3456         hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3457         if (IS_ERR(hba))
3458                 return ERR_CAST(hba);
3459
3460         config_group_init_type_name(&hba->hba_group, name,
3461                         &target_core_hba_cit);
3462
3463         return &hba->hba_group;
3464 }
3465
3466 static void target_core_call_delhbafromtarget(
3467         struct config_group *group,
3468         struct config_item *item)
3469 {
3470         /*
3471          * core_delete_hba() is called from target_core_hba_item_ops->release()
3472          * -> target_core_hba_release()
3473          */
3474         config_item_put(item);
3475 }
3476
3477 static struct configfs_group_operations target_core_group_ops = {
3478         .make_group     = target_core_call_addhbatotarget,
3479         .drop_item      = target_core_call_delhbafromtarget,
3480 };
3481
3482 static const struct config_item_type target_core_cit = {
3483         .ct_item_ops    = NULL,
3484         .ct_group_ops   = &target_core_group_ops,
3485         .ct_attrs       = NULL,
3486         .ct_owner       = THIS_MODULE,
3487 };
3488
3489 /* Stop functions for struct config_item_type target_core_hba_cit */
3490
3491 void target_setup_backend_cits(struct target_backend *tb)
3492 {
3493         target_core_setup_dev_cit(tb);
3494         target_core_setup_dev_action_cit(tb);
3495         target_core_setup_dev_attrib_cit(tb);
3496         target_core_setup_dev_pr_cit(tb);
3497         target_core_setup_dev_wwn_cit(tb);
3498         target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3499         target_core_setup_dev_stat_cit(tb);
3500 }
3501
3502 static void target_init_dbroot(void)
3503 {
3504         struct file *fp;
3505
3506         snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED);
3507         fp = filp_open(db_root_stage, O_RDONLY, 0);
3508         if (IS_ERR(fp)) {
3509                 pr_err("db_root: cannot open: %s\n", db_root_stage);
3510                 return;
3511         }
3512         if (!S_ISDIR(file_inode(fp)->i_mode)) {
3513                 filp_close(fp, NULL);
3514                 pr_err("db_root: not a valid directory: %s\n", db_root_stage);
3515                 return;
3516         }
3517         filp_close(fp, NULL);
3518
3519         strncpy(db_root, db_root_stage, DB_ROOT_LEN);
3520         pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
3521 }
3522
3523 static int __init target_core_init_configfs(void)
3524 {
3525         struct configfs_subsystem *subsys = &target_core_fabrics;
3526         struct t10_alua_lu_gp *lu_gp;
3527         int ret;
3528
3529         pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3530                 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3531                 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3532
3533         config_group_init(&subsys->su_group);
3534         mutex_init(&subsys->su_mutex);
3535
3536         ret = init_se_kmem_caches();
3537         if (ret < 0)
3538                 return ret;
3539         /*
3540          * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3541          * and ALUA Logical Unit Group and Target Port Group infrastructure.
3542          */
3543         config_group_init_type_name(&target_core_hbagroup, "core",
3544                         &target_core_cit);
3545         configfs_add_default_group(&target_core_hbagroup, &subsys->su_group);
3546
3547         /*
3548          * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3549          */
3550         config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit);
3551         configfs_add_default_group(&alua_group, &target_core_hbagroup);
3552
3553         /*
3554          * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3555          * groups under /sys/kernel/config/target/core/alua/
3556          */
3557         config_group_init_type_name(&alua_lu_gps_group, "lu_gps",
3558                         &target_core_alua_lu_gps_cit);
3559         configfs_add_default_group(&alua_lu_gps_group, &alua_group);
3560
3561         /*
3562          * Add core/alua/lu_gps/default_lu_gp
3563          */
3564         lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3565         if (IS_ERR(lu_gp)) {
3566                 ret = -ENOMEM;
3567                 goto out_global;
3568         }
3569
3570         config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3571                                 &target_core_alua_lu_gp_cit);
3572         configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group);
3573
3574         default_lu_gp = lu_gp;
3575
3576         /*
3577          * Register the target_core_mod subsystem with configfs.
3578          */
3579         ret = configfs_register_subsystem(subsys);
3580         if (ret < 0) {
3581                 pr_err("Error %d while registering subsystem %s\n",
3582                         ret, subsys->su_group.cg_item.ci_namebuf);
3583                 goto out_global;
3584         }
3585         pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3586                 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
3587                 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3588         /*
3589          * Register built-in RAMDISK subsystem logic for virtual LUN 0
3590          */
3591         ret = rd_module_init();
3592         if (ret < 0)
3593                 goto out;
3594
3595         ret = core_dev_setup_virtual_lun0();
3596         if (ret < 0)
3597                 goto out;
3598
3599         ret = target_xcopy_setup_pt();
3600         if (ret < 0)
3601                 goto out;
3602
3603         target_init_dbroot();
3604
3605         return 0;
3606
3607 out:
3608         configfs_unregister_subsystem(subsys);
3609         core_dev_release_virtual_lun0();
3610         rd_module_exit();
3611 out_global:
3612         if (default_lu_gp) {
3613                 core_alua_free_lu_gp(default_lu_gp);
3614                 default_lu_gp = NULL;
3615         }
3616         release_se_kmem_caches();
3617         return ret;
3618 }
3619
3620 static void __exit target_core_exit_configfs(void)
3621 {
3622         configfs_remove_default_groups(&alua_lu_gps_group);
3623         configfs_remove_default_groups(&alua_group);
3624         configfs_remove_default_groups(&target_core_hbagroup);
3625
3626         /*
3627          * We expect subsys->su_group.default_groups to be released
3628          * by configfs subsystem provider logic..
3629          */
3630         configfs_unregister_subsystem(&target_core_fabrics);
3631
3632         core_alua_free_lu_gp(default_lu_gp);
3633         default_lu_gp = NULL;
3634
3635         pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3636                         " Infrastructure\n");
3637
3638         core_dev_release_virtual_lun0();
3639         rd_module_exit();
3640         target_xcopy_release_pt();
3641         release_se_kmem_caches();
3642 }
3643
3644 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3645 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3646 MODULE_LICENSE("GPL");
3647
3648 module_init(target_core_init_configfs);
3649 module_exit(target_core_exit_configfs);