drivers/target/target_core_configfs.c

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