drivers/target/target_core_configfs.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*******************************************************************************
   3  * Filename:  target_core_configfs.c
   4  *
   5  * This file contains ConfigFS logic for the Generic Target Engine project.
   6  *
   7  * (c) Copyright 2008-2013 Datera, Inc.
   8  *
   9  * Nicholas A. Bellinger <nab@kernel.org>
  10  *
  11  * based on configfs Copyright (C) 2005 Oracle.  All rights reserved.
  12  *
  13  ****************************************************************************/
  14
  15 #include <linux/module.h>
  16 #include <linux/moduleparam.h>
  17 #include <generated/utsrelease.h>
  18 #include <linux/utsname.h>
  19 #include <linux/init.h>
  20 #include <linux/fs.h>
  21 #include <linux/namei.h>
  22 #include <linux/slab.h>
  23 #include <linux/types.h>
  24 #include <linux/delay.h>
  25 #include <linux/unistd.h>
  26 #include <linux/string.h>
  27 #include <linux/parser.h>
  28 #include <linux/syscalls.h>
  29 #include <linux/configfs.h>
  30 #include <linux/spinlock.h>
  31
  32 #include <target/target_core_base.h>
  33 #include <target/target_core_backend.h>
  34 #include <target/target_core_fabric.h>
  35
  36 #include "target_core_internal.h"
  37 #include "target_core_alua.h"
  38 #include "target_core_pr.h"
  39 #include "target_core_rd.h"
  40 #include "target_core_xcopy.h"
  41
  42 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs)              \
  43 static void target_core_setup_##_name##_cit(struct target_backend *tb)  \
  44 {                                                                       \
  45         struct config_item_type *cit = &tb->tb_##_name##_cit;           \
  46                                                                         \
  47         cit->ct_item_ops = _item_ops;                                   \
  48         cit->ct_group_ops = _group_ops;                                 \
  49         cit->ct_attrs = _attrs;                                         \
  50         cit->ct_owner = tb->ops->owner;                                 \
  51         pr_debug("Setup generic %s\n", __stringify(_name));             \
  52 }
  53
  54 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops)                  \
  55 static void target_core_setup_##_name##_cit(struct target_backend *tb)  \
  56 {                                                                       \
  57         struct config_item_type *cit = &tb->tb_##_name##_cit;           \
  58                                                                         \
  59         cit->ct_item_ops = _item_ops;                                   \
  60         cit->ct_group_ops = _group_ops;                                 \
  61         cit->ct_attrs = tb->ops->tb_##_name##_attrs;                    \
  62         cit->ct_owner = tb->ops->owner;                                 \
  63         pr_debug("Setup generic %s\n", __stringify(_name));             \
  64 }
  65
  66 extern struct t10_alua_lu_gp *default_lu_gp;
  67
  68 static LIST_HEAD(g_tf_list);
  69 static DEFINE_MUTEX(g_tf_lock);
  70
  71 static struct config_group target_core_hbagroup;
  72 static struct config_group alua_group;
  73 static struct config_group alua_lu_gps_group;
  74
  75 static inline struct se_hba *
  76 item_to_hba(struct config_item *item)
  77 {
  78         return container_of(to_config_group(item), struct se_hba, hba_group);
  79 }
  80
  81 /*
  82  * Attributes for /sys/kernel/config/target/
  83  */
  84 static ssize_t target_core_item_version_show(struct config_item *item,
  85                 char *page)
  86 {
  87         return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
  88                 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION,
  89                 utsname()->sysname, utsname()->machine);
  90 }
  91
  92 CONFIGFS_ATTR_RO(target_core_item_, version);
  93
  94 char db_root[DB_ROOT_LEN] = DB_ROOT_DEFAULT;
  95 static char db_root_stage[DB_ROOT_LEN];
  96
  97 static ssize_t target_core_item_dbroot_show(struct config_item *item,
  98                                             char *page)
  99 {
 100         return sprintf(page, "%s\n", db_root);
 101 }
 102
 103 static ssize_t target_core_item_dbroot_store(struct config_item *item,
 104                                         const char *page, size_t count)
 105 {
 106         ssize_t read_bytes;
 107         struct file *fp;
 108
 109         mutex_lock(&g_tf_lock);
 110         if (!list_empty(&g_tf_list)) {
 111                 mutex_unlock(&g_tf_lock);
 112                 pr_err("db_root: cannot be changed: target drivers registered");
 113                 return -EINVAL;
 114         }
 115
 116         if (count > (DB_ROOT_LEN - 1)) {
 117                 mutex_unlock(&g_tf_lock);
 118                 pr_err("db_root: count %d exceeds DB_ROOT_LEN-1: %u\n",
 119                        (int)count, DB_ROOT_LEN - 1);
 120                 return -EINVAL;
 121         }
 122
 123         read_bytes = snprintf(db_root_stage, DB_ROOT_LEN, "%s", page);
 124         if (!read_bytes) {
 125                 mutex_unlock(&g_tf_lock);
 126                 return -EINVAL;
 127         }
 128         if (db_root_stage[read_bytes - 1] == '\n')
 129                 db_root_stage[read_bytes - 1] = '\0';
 130
 131         /* validate new db root before accepting it */
 132         fp = filp_open(db_root_stage, O_RDONLY, 0);
 133         if (IS_ERR(fp)) {
 134                 mutex_unlock(&g_tf_lock);
 135                 pr_err("db_root: cannot open: %s\n", db_root_stage);
 136                 return -EINVAL;
 137         }
 138         if (!S_ISDIR(file_inode(fp)->i_mode)) {
 139                 filp_close(fp, NULL);
 140                 mutex_unlock(&g_tf_lock);
 141                 pr_err("db_root: not a directory: %s\n", db_root_stage);
 142                 return -EINVAL;
 143         }
 144         filp_close(fp, NULL);
 145
 146         strncpy(db_root, db_root_stage, read_bytes);
 147
 148         mutex_unlock(&g_tf_lock);
 149
 150         pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
 151
 152         return read_bytes;
 153 }
 154
 155 CONFIGFS_ATTR(target_core_item_, dbroot);
 156
 157 static struct target_fabric_configfs *target_core_get_fabric(
 158         const char *name)
 159 {
 160         struct target_fabric_configfs *tf;
 161
 162         if (!name)
 163                 return NULL;
 164
 165         mutex_lock(&g_tf_lock);
 166         list_for_each_entry(tf, &g_tf_list, tf_list) {
 167                 const char *cmp_name = tf->tf_ops->fabric_alias;
 168                 if (!cmp_name)
 169                         cmp_name = tf->tf_ops->fabric_name;
 170                 if (!strcmp(cmp_name, name)) {
 171                         atomic_inc(&tf->tf_access_cnt);
 172                         mutex_unlock(&g_tf_lock);
 173                         return tf;
 174                 }
 175         }
 176         mutex_unlock(&g_tf_lock);
 177
 178         return NULL;
 179 }
 180
 181 /*
 182  * Called from struct target_core_group_ops->make_group()
 183  */
 184 static struct config_group *target_core_register_fabric(
 185         struct config_group *group,
 186         const char *name)
 187 {
 188         struct target_fabric_configfs *tf;
 189         int ret;
 190
 191         pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
 192                         " %s\n", group, name);
 193
 194         tf = target_core_get_fabric(name);
 195         if (!tf) {
 196                 pr_debug("target_core_register_fabric() trying autoload for %s\n",
 197                          name);
 198
 199                 /*
 200                  * Below are some hardcoded request_module() calls to automatically
 201                  * local fabric modules when the following is called:
 202                  *
 203                  * mkdir -p /sys/kernel/config/target/$MODULE_NAME
 204                  *
 205                  * Note that this does not limit which TCM fabric module can be
 206                  * registered, but simply provids auto loading logic for modules with
 207                  * mkdir(2) system calls with known TCM fabric modules.
 208                  */
 209
 210                 if (!strncmp(name, "iscsi", 5)) {
 211                         /*
 212                          * Automatically load the LIO Target fabric module when the
 213                          * following is called:
 214                          *
 215                          * mkdir -p $CONFIGFS/target/iscsi
 216                          */
 217                         ret = request_module("iscsi_target_mod");
 218                         if (ret < 0) {
 219                                 pr_debug("request_module() failed for"
 220                                          " iscsi_target_mod.ko: %d\n", ret);
 221                                 return ERR_PTR(-EINVAL);
 222                         }
 223                 } else if (!strncmp(name, "loopback", 8)) {
 224                         /*
 225                          * Automatically load the tcm_loop fabric module when the
 226                          * following is called:
 227                          *
 228                          * mkdir -p $CONFIGFS/target/loopback
 229                          */
 230                         ret = request_module("tcm_loop");
 231                         if (ret < 0) {
 232                                 pr_debug("request_module() failed for"
 233                                          " tcm_loop.ko: %d\n", ret);
 234                                 return ERR_PTR(-EINVAL);
 235                         }
 236                 }
 237
 238                 tf = target_core_get_fabric(name);
 239         }
 240
 241         if (!tf) {
 242                 pr_debug("target_core_get_fabric() failed for %s\n",
 243                          name);
 244                 return ERR_PTR(-EINVAL);
 245         }
 246         pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
 247                         " %s\n", tf->tf_ops->fabric_name);
 248         /*
 249          * On a successful target_core_get_fabric() look, the returned
 250          * struct target_fabric_configfs *tf will contain a usage reference.
 251          */
 252         pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
 253                         &tf->tf_wwn_cit);
 254
 255         config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit);
 256
 257         config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
 258                         &tf->tf_discovery_cit);
 259         configfs_add_default_group(&tf->tf_disc_group, &tf->tf_group);
 260
 261         pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric: %s\n",
 262                  config_item_name(&tf->tf_group.cg_item));
 263         return &tf->tf_group;
 264 }
 265
 266 /*
 267  * Called from struct target_core_group_ops->drop_item()
 268  */
 269 static void target_core_deregister_fabric(
 270         struct config_group *group,
 271         struct config_item *item)
 272 {
 273         struct target_fabric_configfs *tf = container_of(
 274                 to_config_group(item), struct target_fabric_configfs, tf_group);
 275
 276         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
 277                 " tf list\n", config_item_name(item));
 278
 279         pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
 280                         " %s\n", tf->tf_ops->fabric_name);
 281         atomic_dec(&tf->tf_access_cnt);
 282
 283         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
 284                         " %s\n", config_item_name(item));
 285
 286         configfs_remove_default_groups(&tf->tf_group);
 287         config_item_put(item);
 288 }
 289
 290 static struct configfs_group_operations target_core_fabric_group_ops = {
 291         .make_group     = &target_core_register_fabric,
 292         .drop_item      = &target_core_deregister_fabric,
 293 };
 294
 295 /*
 296  * All item attributes appearing in /sys/kernel/target/ appear here.
 297  */
 298 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
 299         &target_core_item_attr_version,
 300         &target_core_item_attr_dbroot,
 301         NULL,
 302 };
 303
 304 /*
 305  * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
 306  */
 307 static const struct config_item_type target_core_fabrics_item = {
 308         .ct_group_ops   = &target_core_fabric_group_ops,
 309         .ct_attrs       = target_core_fabric_item_attrs,
 310         .ct_owner       = THIS_MODULE,
 311 };
 312
 313 static struct configfs_subsystem target_core_fabrics = {
 314         .su_group = {
 315                 .cg_item = {
 316                         .ci_namebuf = "target",
 317                         .ci_type = &target_core_fabrics_item,
 318                 },
 319         },
 320 };
 321
 322 int target_depend_item(struct config_item *item)
 323 {
 324         return configfs_depend_item(&target_core_fabrics, item);
 325 }
 326 EXPORT_SYMBOL(target_depend_item);
 327
 328 void target_undepend_item(struct config_item *item)
 329 {
 330         return configfs_undepend_item(item);
 331 }
 332 EXPORT_SYMBOL(target_undepend_item);
 333
 334 /*##############################################################################
 335 // Start functions called by external Target Fabrics Modules
 336 //############################################################################*/
 337
 338 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
 339 {
 340         if (tfo->fabric_alias) {
 341                 if (strlen(tfo->fabric_alias) >= TARGET_FABRIC_NAME_SIZE) {
 342                         pr_err("Passed alias: %s exceeds "
 343                                 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_alias);
 344                         return -EINVAL;
 345                 }
 346         }
 347         if (!tfo->fabric_name) {
 348                 pr_err("Missing tfo->fabric_name\n");
 349                 return -EINVAL;
 350         }
 351         if (strlen(tfo->fabric_name) >= TARGET_FABRIC_NAME_SIZE) {
 352                 pr_err("Passed name: %s exceeds "
 353                         "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_name);
 354                 return -EINVAL;
 355         }
 356         if (!tfo->tpg_get_wwn) {
 357                 pr_err("Missing tfo->tpg_get_wwn()\n");
 358                 return -EINVAL;
 359         }
 360         if (!tfo->tpg_get_tag) {
 361                 pr_err("Missing tfo->tpg_get_tag()\n");
 362                 return -EINVAL;
 363         }
 364         if (!tfo->tpg_check_demo_mode) {
 365                 pr_err("Missing tfo->tpg_check_demo_mode()\n");
 366                 return -EINVAL;
 367         }
 368         if (!tfo->tpg_check_demo_mode_cache) {
 369                 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
 370                 return -EINVAL;
 371         }
 372         if (!tfo->tpg_check_demo_mode_write_protect) {
 373                 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
 374                 return -EINVAL;
 375         }
 376         if (!tfo->tpg_check_prod_mode_write_protect) {
 377                 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
 378                 return -EINVAL;
 379         }
 380         if (!tfo->tpg_get_inst_index) {
 381                 pr_err("Missing tfo->tpg_get_inst_index()\n");
 382                 return -EINVAL;
 383         }
 384         if (!tfo->release_cmd) {
 385                 pr_err("Missing tfo->release_cmd()\n");
 386                 return -EINVAL;
 387         }
 388         if (!tfo->sess_get_index) {
 389                 pr_err("Missing tfo->sess_get_index()\n");
 390                 return -EINVAL;
 391         }
 392         if (!tfo->write_pending) {
 393                 pr_err("Missing tfo->write_pending()\n");
 394                 return -EINVAL;
 395         }
 396         if (!tfo->set_default_node_attributes) {
 397                 pr_err("Missing tfo->set_default_node_attributes()\n");
 398                 return -EINVAL;
 399         }
 400         if (!tfo->get_cmd_state) {
 401                 pr_err("Missing tfo->get_cmd_state()\n");
 402                 return -EINVAL;
 403         }
 404         if (!tfo->queue_data_in) {
 405                 pr_err("Missing tfo->queue_data_in()\n");
 406                 return -EINVAL;
 407         }
 408         if (!tfo->queue_status) {
 409                 pr_err("Missing tfo->queue_status()\n");
 410                 return -EINVAL;
 411         }
 412         if (!tfo->queue_tm_rsp) {
 413                 pr_err("Missing tfo->queue_tm_rsp()\n");
 414                 return -EINVAL;
 415         }
 416         if (!tfo->aborted_task) {
 417                 pr_err("Missing tfo->aborted_task()\n");
 418                 return -EINVAL;
 419         }
 420         if (!tfo->check_stop_free) {
 421                 pr_err("Missing tfo->check_stop_free()\n");
 422                 return -EINVAL;
 423         }
 424         /*
 425          * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
 426          * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
 427          * target_core_fabric_configfs.c WWN+TPG group context code.
 428          */
 429         if (!tfo->fabric_make_wwn) {
 430                 pr_err("Missing tfo->fabric_make_wwn()\n");
 431                 return -EINVAL;
 432         }
 433         if (!tfo->fabric_drop_wwn) {
 434                 pr_err("Missing tfo->fabric_drop_wwn()\n");
 435                 return -EINVAL;
 436         }
 437         if (!tfo->fabric_make_tpg) {
 438                 pr_err("Missing tfo->fabric_make_tpg()\n");
 439                 return -EINVAL;
 440         }
 441         if (!tfo->fabric_drop_tpg) {
 442                 pr_err("Missing tfo->fabric_drop_tpg()\n");
 443                 return -EINVAL;
 444         }
 445
 446         return 0;
 447 }
 448
 449 int target_register_template(const struct target_core_fabric_ops *fo)
 450 {
 451         struct target_fabric_configfs *tf;
 452         int ret;
 453
 454         ret = target_fabric_tf_ops_check(fo);
 455         if (ret)
 456                 return ret;
 457
 458         tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
 459         if (!tf) {
 460                 pr_err("%s: could not allocate memory!\n", __func__);
 461                 return -ENOMEM;
 462         }
 463
 464         INIT_LIST_HEAD(&tf->tf_list);
 465         atomic_set(&tf->tf_access_cnt, 0);
 466         tf->tf_ops = fo;
 467         target_fabric_setup_cits(tf);
 468
 469         mutex_lock(&g_tf_lock);
 470         list_add_tail(&tf->tf_list, &g_tf_list);
 471         mutex_unlock(&g_tf_lock);
 472
 473         return 0;
 474 }
 475 EXPORT_SYMBOL(target_register_template);
 476
 477 void target_unregister_template(const struct target_core_fabric_ops *fo)
 478 {
 479         struct target_fabric_configfs *t;
 480
 481         mutex_lock(&g_tf_lock);
 482         list_for_each_entry(t, &g_tf_list, tf_list) {
 483                 if (!strcmp(t->tf_ops->fabric_name, fo->fabric_name)) {
 484                         BUG_ON(atomic_read(&t->tf_access_cnt));
 485                         list_del(&t->tf_list);
 486                         mutex_unlock(&g_tf_lock);
 487                         /*
 488                          * Wait for any outstanding fabric se_deve_entry->rcu_head
 489                          * callbacks to complete post kfree_rcu(), before allowing
 490                          * fabric driver unload of TFO->module to proceed.
 491                          */
 492                         rcu_barrier();
 493                         kfree(t);
 494                         return;
 495                 }
 496         }
 497         mutex_unlock(&g_tf_lock);
 498 }
 499 EXPORT_SYMBOL(target_unregister_template);
 500
 501 /*##############################################################################
 502 // Stop functions called by external Target Fabrics Modules
 503 //############################################################################*/
 504
 505 static inline struct se_dev_attrib *to_attrib(struct config_item *item)
 506 {
 507         return container_of(to_config_group(item), struct se_dev_attrib,
 508                         da_group);
 509 }
 510
 511 /* Start functions for struct config_item_type tb_dev_attrib_cit */
 512 #define DEF_CONFIGFS_ATTRIB_SHOW(_name)                                 \
 513 static ssize_t _name##_show(struct config_item *item, char *page)       \
 514 {                                                                       \
 515         return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \
 516 }
 517
 518 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias);
 519 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo);
 520 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write);
 521 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read);
 522 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache);
 523 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl);
 524 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas);
 525 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu);
 526 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws);
 527 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw);
 528 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc);
 529 DEF_CONFIGFS_ATTRIB_SHOW(emulate_pr);
 530 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type);
 531 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type);
 532 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify);
 533 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids);
 534 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot);
 535 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord);
 536 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl);
 537 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size);
 538 DEF_CONFIGFS_ATTRIB_SHOW(block_size);
 539 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors);
 540 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors);
 541 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth);
 542 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth);
 543 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count);
 544 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count);
 545 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity);
 546 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment);
 547 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data);
 548 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len);
 549
 550 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name)                            \
 551 static ssize_t _name##_store(struct config_item *item, const char *page,\
 552                 size_t count)                                           \
 553 {                                                                       \
 554         struct se_dev_attrib *da = to_attrib(item);                     \
 555         u32 val;                                                        \
 556         int ret;                                                        \
 557                                                                         \
 558         ret = kstrtou32(page, 0, &val);                                 \
 559         if (ret < 0)                                                    \
 560                 return ret;                                             \
 561         da->_name = val;                                                \
 562         return count;                                                   \
 563 }
 564
 565 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count);
 566 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count);
 567 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity);
 568 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment);
 569 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len);
 570
 571 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name)                           \
 572 static ssize_t _name##_store(struct config_item *item, const char *page,        \
 573                 size_t count)                                           \
 574 {                                                                       \
 575         struct se_dev_attrib *da = to_attrib(item);                     \
 576         bool flag;                                                      \
 577         int ret;                                                        \
 578                                                                         \
 579         ret = strtobool(page, &flag);                                   \
 580         if (ret < 0)                                                    \
 581                 return ret;                                             \
 582         da->_name = flag;                                               \
 583         return count;                                                   \
 584 }
 585
 586 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write);
 587 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw);
 588 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc);
 589 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr);
 590 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids);
 591 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot);
 592
 593 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name)                           \
 594 static ssize_t _name##_store(struct config_item *item, const char *page,\
 595                 size_t count)                                           \
 596 {                                                                       \
 597         printk_once(KERN_WARNING                                        \
 598                 "ignoring deprecated %s attribute\n",                   \
 599                 __stringify(_name));                                    \
 600         return count;                                                   \
 601 }
 602
 603 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo);
 604 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read);
 605
 606 static void dev_set_t10_wwn_model_alias(struct se_device *dev)
 607 {
 608         const char *configname;
 609
 610         configname = config_item_name(&dev->dev_group.cg_item);
 611         if (strlen(configname) >= INQUIRY_MODEL_LEN) {
 612                 pr_warn("dev[%p]: Backstore name '%s' is too long for "
 613                         "INQUIRY_MODEL, truncating to 15 characters\n", dev,
 614                         configname);
 615         }
 616         /*
 617          * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1)
 618          * here without potentially breaking existing setups, so continue to
 619          * truncate one byte shorter than what can be carried in INQUIRY.
 620          */
 621         strlcpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN);
 622 }
 623
 624 static ssize_t emulate_model_alias_store(struct config_item *item,
 625                 const char *page, size_t count)
 626 {
 627         struct se_dev_attrib *da = to_attrib(item);
 628         struct se_device *dev = da->da_dev;
 629         bool flag;
 630         int ret;
 631
 632         if (dev->export_count) {
 633                 pr_err("dev[%p]: Unable to change model alias"
 634                         " while export_count is %d\n",
 635                         dev, dev->export_count);
 636                 return -EINVAL;
 637         }
 638
 639         ret = strtobool(page, &flag);
 640         if (ret < 0)
 641                 return ret;
 642
 643         BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
 644         if (flag) {
 645                 dev_set_t10_wwn_model_alias(dev);
 646         } else {
 647                 strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod,
 648                         sizeof(dev->t10_wwn.model));
 649         }
 650         da->emulate_model_alias = flag;
 651         return count;
 652 }
 653
 654 static ssize_t emulate_write_cache_store(struct config_item *item,
 655                 const char *page, size_t count)
 656 {
 657         struct se_dev_attrib *da = to_attrib(item);
 658         bool flag;
 659         int ret;
 660
 661         ret = strtobool(page, &flag);
 662         if (ret < 0)
 663                 return ret;
 664
 665         if (flag && da->da_dev->transport->get_write_cache) {
 666                 pr_err("emulate_write_cache not supported for this device\n");
 667                 return -EINVAL;
 668         }
 669
 670         da->emulate_write_cache = flag;
 671         pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
 672                         da->da_dev, flag);
 673         return count;
 674 }
 675
 676 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item,
 677                 const char *page, size_t count)
 678 {
 679         struct se_dev_attrib *da = to_attrib(item);
 680         u32 val;
 681         int ret;
 682
 683         ret = kstrtou32(page, 0, &val);
 684         if (ret < 0)
 685                 return ret;
 686
 687         if (val != TARGET_UA_INTLCK_CTRL_CLEAR
 688          && val != TARGET_UA_INTLCK_CTRL_NO_CLEAR
 689          && val != TARGET_UA_INTLCK_CTRL_ESTABLISH_UA) {
 690                 pr_err("Illegal value %d\n", val);
 691                 return -EINVAL;
 692         }
 693
 694         if (da->da_dev->export_count) {
 695                 pr_err("dev[%p]: Unable to change SE Device"
 696                         " UA_INTRLCK_CTRL while export_count is %d\n",
 697                         da->da_dev, da->da_dev->export_count);
 698                 return -EINVAL;
 699         }
 700         da->emulate_ua_intlck_ctrl = val;
 701         pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
 702                 da->da_dev, val);
 703         return count;
 704 }
 705
 706 static ssize_t emulate_tas_store(struct config_item *item,
 707                 const char *page, size_t count)
 708 {
 709         struct se_dev_attrib *da = to_attrib(item);
 710         bool flag;
 711         int ret;
 712
 713         ret = strtobool(page, &flag);
 714         if (ret < 0)
 715                 return ret;
 716
 717         if (da->da_dev->export_count) {
 718                 pr_err("dev[%p]: Unable to change SE Device TAS while"
 719                         " export_count is %d\n",
 720                         da->da_dev, da->da_dev->export_count);
 721                 return -EINVAL;
 722         }
 723         da->emulate_tas = flag;
 724         pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
 725                 da->da_dev, flag ? "Enabled" : "Disabled");
 726
 727         return count;
 728 }
 729
 730 static ssize_t emulate_tpu_store(struct config_item *item,
 731                 const char *page, size_t count)
 732 {
 733         struct se_dev_attrib *da = to_attrib(item);
 734         bool flag;
 735         int ret;
 736
 737         ret = strtobool(page, &flag);
 738         if (ret < 0)
 739                 return ret;
 740
 741         /*
 742          * We expect this value to be non-zero when generic Block Layer
 743          * Discard supported is detected iblock_create_virtdevice().
 744          */
 745         if (flag && !da->max_unmap_block_desc_count) {
 746                 pr_err("Generic Block Discard not supported\n");
 747                 return -ENOSYS;
 748         }
 749
 750         da->emulate_tpu = flag;
 751         pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
 752                 da->da_dev, flag);
 753         return count;
 754 }
 755
 756 static ssize_t emulate_tpws_store(struct config_item *item,
 757                 const char *page, size_t count)
 758 {
 759         struct se_dev_attrib *da = to_attrib(item);
 760         bool flag;
 761         int ret;
 762
 763         ret = strtobool(page, &flag);
 764         if (ret < 0)
 765                 return ret;
 766
 767         /*
 768          * We expect this value to be non-zero when generic Block Layer
 769          * Discard supported is detected iblock_create_virtdevice().
 770          */
 771         if (flag && !da->max_unmap_block_desc_count) {
 772                 pr_err("Generic Block Discard not supported\n");
 773                 return -ENOSYS;
 774         }
 775
 776         da->emulate_tpws = flag;
 777         pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
 778                                 da->da_dev, flag);
 779         return count;
 780 }
 781
 782 static ssize_t pi_prot_type_store(struct config_item *item,
 783                 const char *page, size_t count)
 784 {
 785         struct se_dev_attrib *da = to_attrib(item);
 786         int old_prot = da->pi_prot_type, ret;
 787         struct se_device *dev = da->da_dev;
 788         u32 flag;
 789
 790         ret = kstrtou32(page, 0, &flag);
 791         if (ret < 0)
 792                 return ret;
 793
 794         if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
 795                 pr_err("Illegal value %d for pi_prot_type\n", flag);
 796                 return -EINVAL;
 797         }
 798         if (flag == 2) {
 799                 pr_err("DIF TYPE2 protection currently not supported\n");
 800                 return -ENOSYS;
 801         }
 802         if (da->hw_pi_prot_type) {
 803                 pr_warn("DIF protection enabled on underlying hardware,"
 804                         " ignoring\n");
 805                 return count;
 806         }
 807         if (!dev->transport->init_prot || !dev->transport->free_prot) {
 808                 /* 0 is only allowed value for non-supporting backends */
 809                 if (flag == 0)
 810                         return count;
 811
 812                 pr_err("DIF protection not supported by backend: %s\n",
 813                        dev->transport->name);
 814                 return -ENOSYS;
 815         }
 816         if (!target_dev_configured(dev)) {
 817                 pr_err("DIF protection requires device to be configured\n");
 818                 return -ENODEV;
 819         }
 820         if (dev->export_count) {
 821                 pr_err("dev[%p]: Unable to change SE Device PROT type while"
 822                        " export_count is %d\n", dev, dev->export_count);
 823                 return -EINVAL;
 824         }
 825
 826         da->pi_prot_type = flag;
 827
 828         if (flag && !old_prot) {
 829                 ret = dev->transport->init_prot(dev);
 830                 if (ret) {
 831                         da->pi_prot_type = old_prot;
 832                         da->pi_prot_verify = (bool) da->pi_prot_type;
 833                         return ret;
 834                 }
 835
 836         } else if (!flag && old_prot) {
 837                 dev->transport->free_prot(dev);
 838         }
 839
 840         da->pi_prot_verify = (bool) da->pi_prot_type;
 841         pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
 842         return count;
 843 }
 844
 845 /* always zero, but attr needs to remain RW to avoid userspace breakage */
 846 static ssize_t pi_prot_format_show(struct config_item *item, char *page)
 847 {
 848         return snprintf(page, PAGE_SIZE, "0\n");
 849 }
 850
 851 static ssize_t pi_prot_format_store(struct config_item *item,
 852                 const char *page, size_t count)
 853 {
 854         struct se_dev_attrib *da = to_attrib(item);
 855         struct se_device *dev = da->da_dev;
 856         bool flag;
 857         int ret;
 858
 859         ret = strtobool(page, &flag);
 860         if (ret < 0)
 861                 return ret;
 862
 863         if (!flag)
 864                 return count;
 865
 866         if (!dev->transport->format_prot) {
 867                 pr_err("DIF protection format not supported by backend %s\n",
 868                        dev->transport->name);
 869                 return -ENOSYS;
 870         }
 871         if (!target_dev_configured(dev)) {
 872                 pr_err("DIF protection format requires device to be configured\n");
 873                 return -ENODEV;
 874         }
 875         if (dev->export_count) {
 876                 pr_err("dev[%p]: Unable to format SE Device PROT type while"
 877                        " export_count is %d\n", dev, dev->export_count);
 878                 return -EINVAL;
 879         }
 880
 881         ret = dev->transport->format_prot(dev);
 882         if (ret)
 883                 return ret;
 884
 885         pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
 886         return count;
 887 }
 888
 889 static ssize_t pi_prot_verify_store(struct config_item *item,
 890                 const char *page, size_t count)
 891 {
 892         struct se_dev_attrib *da = to_attrib(item);
 893         bool flag;
 894         int ret;
 895
 896         ret = strtobool(page, &flag);
 897         if (ret < 0)
 898                 return ret;
 899
 900         if (!flag) {
 901                 da->pi_prot_verify = flag;
 902                 return count;
 903         }
 904         if (da->hw_pi_prot_type) {
 905                 pr_warn("DIF protection enabled on underlying hardware,"
 906                         " ignoring\n");
 907                 return count;
 908         }
 909         if (!da->pi_prot_type) {
 910                 pr_warn("DIF protection not supported by backend, ignoring\n");
 911                 return count;
 912         }
 913         da->pi_prot_verify = flag;
 914
 915         return count;
 916 }
 917
 918 static ssize_t force_pr_aptpl_store(struct config_item *item,
 919                 const char *page, size_t count)
 920 {
 921         struct se_dev_attrib *da = to_attrib(item);
 922         bool flag;
 923         int ret;
 924
 925         ret = strtobool(page, &flag);
 926         if (ret < 0)
 927                 return ret;
 928         if (da->da_dev->export_count) {
 929                 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
 930                        " export_count is %d\n",
 931                        da->da_dev, da->da_dev->export_count);
 932                 return -EINVAL;
 933         }
 934
 935         da->force_pr_aptpl = flag;
 936         pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag);
 937         return count;
 938 }
 939
 940 static ssize_t emulate_rest_reord_store(struct config_item *item,
 941                 const char *page, size_t count)
 942 {
 943         struct se_dev_attrib *da = to_attrib(item);
 944         bool flag;
 945         int ret;
 946
 947         ret = strtobool(page, &flag);
 948         if (ret < 0)
 949                 return ret;
 950
 951         if (flag != 0) {
 952                 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted"
 953                         " reordering not implemented\n", da->da_dev);
 954                 return -ENOSYS;
 955         }
 956         da->emulate_rest_reord = flag;
 957         pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
 958                 da->da_dev, flag);
 959         return count;
 960 }
 961
 962 static ssize_t unmap_zeroes_data_store(struct config_item *item,
 963                 const char *page, size_t count)
 964 {
 965         struct se_dev_attrib *da = to_attrib(item);
 966         bool flag;
 967         int ret;
 968
 969         ret = strtobool(page, &flag);
 970         if (ret < 0)
 971                 return ret;
 972
 973         if (da->da_dev->export_count) {
 974                 pr_err("dev[%p]: Unable to change SE Device"
 975                        " unmap_zeroes_data while export_count is %d\n",
 976                        da->da_dev, da->da_dev->export_count);
 977                 return -EINVAL;
 978         }
 979         /*
 980          * We expect this value to be non-zero when generic Block Layer
 981          * Discard supported is detected iblock_configure_device().
 982          */
 983         if (flag && !da->max_unmap_block_desc_count) {
 984                 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set"
 985                        " because max_unmap_block_desc_count is zero\n",
 986                        da->da_dev);
 987                 return -ENOSYS;
 988         }
 989         da->unmap_zeroes_data = flag;
 990         pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n",
 991                  da->da_dev, flag);
 992         return count;
 993 }
 994
 995 /*
 996  * Note, this can only be called on unexported SE Device Object.
 997  */
 998 static ssize_t queue_depth_store(struct config_item *item,
 999                 const char *page, size_t count)
1000 {
1001         struct se_dev_attrib *da = to_attrib(item);
1002         struct se_device *dev = da->da_dev;
1003         u32 val;
1004         int ret;
1005
1006         ret = kstrtou32(page, 0, &val);
1007         if (ret < 0)
1008                 return ret;
1009
1010         if (dev->export_count) {
1011                 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1012                         " export_count is %d\n",
1013                         dev, dev->export_count);
1014                 return -EINVAL;
1015         }
1016         if (!val) {
1017                 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
1018                 return -EINVAL;
1019         }
1020
1021         if (val > dev->dev_attrib.queue_depth) {
1022                 if (val > dev->dev_attrib.hw_queue_depth) {
1023                         pr_err("dev[%p]: Passed queue_depth:"
1024                                 " %u exceeds TCM/SE_Device MAX"
1025                                 " TCQ: %u\n", dev, val,
1026                                 dev->dev_attrib.hw_queue_depth);
1027                         return -EINVAL;
1028                 }
1029         }
1030         da->queue_depth = dev->queue_depth = val;
1031         pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val);
1032         return count;
1033 }
1034
1035 static ssize_t optimal_sectors_store(struct config_item *item,
1036                 const char *page, size_t count)
1037 {
1038         struct se_dev_attrib *da = to_attrib(item);
1039         u32 val;
1040         int ret;
1041
1042         ret = kstrtou32(page, 0, &val);
1043         if (ret < 0)
1044                 return ret;
1045
1046         if (da->da_dev->export_count) {
1047                 pr_err("dev[%p]: Unable to change SE Device"
1048                         " optimal_sectors while export_count is %d\n",
1049                         da->da_dev, da->da_dev->export_count);
1050                 return -EINVAL;
1051         }
1052         if (val > da->hw_max_sectors) {
1053                 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1054                         " greater than hw_max_sectors: %u\n",
1055                         da->da_dev, val, da->hw_max_sectors);
1056                 return -EINVAL;
1057         }
1058
1059         da->optimal_sectors = val;
1060         pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1061                         da->da_dev, val);
1062         return count;
1063 }
1064
1065 static ssize_t block_size_store(struct config_item *item,
1066                 const char *page, size_t count)
1067 {
1068         struct se_dev_attrib *da = to_attrib(item);
1069         u32 val;
1070         int ret;
1071
1072         ret = kstrtou32(page, 0, &val);
1073         if (ret < 0)
1074                 return ret;
1075
1076         if (da->da_dev->export_count) {
1077                 pr_err("dev[%p]: Unable to change SE Device block_size"
1078                         " while export_count is %d\n",
1079                         da->da_dev, da->da_dev->export_count);
1080                 return -EINVAL;
1081         }
1082
1083         if (val != 512 && val != 1024 && val != 2048 && val != 4096) {
1084                 pr_err("dev[%p]: Illegal value for block_device: %u"
1085                         " for SE device, must be 512, 1024, 2048 or 4096\n",
1086                         da->da_dev, val);
1087                 return -EINVAL;
1088         }
1089
1090         da->block_size = val;
1091         if (da->max_bytes_per_io)
1092                 da->hw_max_sectors = da->max_bytes_per_io / val;
1093
1094         pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1095                         da->da_dev, val);
1096         return count;
1097 }
1098
1099 static ssize_t alua_support_show(struct config_item *item, char *page)
1100 {
1101         struct se_dev_attrib *da = to_attrib(item);
1102         u8 flags = da->da_dev->transport_flags;
1103
1104         return snprintf(page, PAGE_SIZE, "%d\n",
1105                         flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1);
1106 }
1107
1108 static ssize_t alua_support_store(struct config_item *item,
1109                 const char *page, size_t count)
1110 {
1111         struct se_dev_attrib *da = to_attrib(item);
1112         struct se_device *dev = da->da_dev;
1113         bool flag, oldflag;
1114         int ret;
1115
1116         ret = strtobool(page, &flag);
1117         if (ret < 0)
1118                 return ret;
1119
1120         oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA);
1121         if (flag == oldflag)
1122                 return count;
1123
1124         if (!(dev->transport->transport_flags_changeable &
1125               TRANSPORT_FLAG_PASSTHROUGH_ALUA)) {
1126                 pr_err("dev[%p]: Unable to change SE Device alua_support:"
1127                         " alua_support has fixed value\n", dev);
1128                 return -ENOSYS;
1129         }
1130
1131         if (flag)
1132                 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_ALUA;
1133         else
1134                 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_ALUA;
1135         return count;
1136 }
1137
1138 static ssize_t pgr_support_show(struct config_item *item, char *page)
1139 {
1140         struct se_dev_attrib *da = to_attrib(item);
1141         u8 flags = da->da_dev->transport_flags;
1142
1143         return snprintf(page, PAGE_SIZE, "%d\n",
1144                         flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1);
1145 }
1146
1147 static ssize_t pgr_support_store(struct config_item *item,
1148                 const char *page, size_t count)
1149 {
1150         struct se_dev_attrib *da = to_attrib(item);
1151         struct se_device *dev = da->da_dev;
1152         bool flag, oldflag;
1153         int ret;
1154
1155         ret = strtobool(page, &flag);
1156         if (ret < 0)
1157                 return ret;
1158
1159         oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR);
1160         if (flag == oldflag)
1161                 return count;
1162
1163         if (!(dev->transport->transport_flags_changeable &
1164               TRANSPORT_FLAG_PASSTHROUGH_PGR)) {
1165                 pr_err("dev[%p]: Unable to change SE Device pgr_support:"
1166                         " pgr_support has fixed value\n", dev);
1167                 return -ENOSYS;
1168         }
1169
1170         if (flag)
1171                 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_PGR;
1172         else
1173                 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_PGR;
1174         return count;
1175 }
1176
1177 CONFIGFS_ATTR(, emulate_model_alias);
1178 CONFIGFS_ATTR(, emulate_dpo);
1179 CONFIGFS_ATTR(, emulate_fua_write);
1180 CONFIGFS_ATTR(, emulate_fua_read);
1181 CONFIGFS_ATTR(, emulate_write_cache);
1182 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl);
1183 CONFIGFS_ATTR(, emulate_tas);
1184 CONFIGFS_ATTR(, emulate_tpu);
1185 CONFIGFS_ATTR(, emulate_tpws);
1186 CONFIGFS_ATTR(, emulate_caw);
1187 CONFIGFS_ATTR(, emulate_3pc);
1188 CONFIGFS_ATTR(, emulate_pr);
1189 CONFIGFS_ATTR(, pi_prot_type);
1190 CONFIGFS_ATTR_RO(, hw_pi_prot_type);
1191 CONFIGFS_ATTR(, pi_prot_format);
1192 CONFIGFS_ATTR(, pi_prot_verify);
1193 CONFIGFS_ATTR(, enforce_pr_isids);
1194 CONFIGFS_ATTR(, is_nonrot);
1195 CONFIGFS_ATTR(, emulate_rest_reord);
1196 CONFIGFS_ATTR(, force_pr_aptpl);
1197 CONFIGFS_ATTR_RO(, hw_block_size);
1198 CONFIGFS_ATTR(, block_size);
1199 CONFIGFS_ATTR_RO(, hw_max_sectors);
1200 CONFIGFS_ATTR(, optimal_sectors);
1201 CONFIGFS_ATTR_RO(, hw_queue_depth);
1202 CONFIGFS_ATTR(, queue_depth);
1203 CONFIGFS_ATTR(, max_unmap_lba_count);
1204 CONFIGFS_ATTR(, max_unmap_block_desc_count);
1205 CONFIGFS_ATTR(, unmap_granularity);
1206 CONFIGFS_ATTR(, unmap_granularity_alignment);
1207 CONFIGFS_ATTR(, unmap_zeroes_data);
1208 CONFIGFS_ATTR(, max_write_same_len);
1209 CONFIGFS_ATTR(, alua_support);
1210 CONFIGFS_ATTR(, pgr_support);
1211
1212 /*
1213  * dev_attrib attributes for devices using the target core SBC/SPC
1214  * interpreter.  Any backend using spc_parse_cdb should be using
1215  * these.
1216  */
1217 struct configfs_attribute *sbc_attrib_attrs[] = {
1218         &attr_emulate_model_alias,
1219         &attr_emulate_dpo,
1220         &attr_emulate_fua_write,
1221         &attr_emulate_fua_read,
1222         &attr_emulate_write_cache,
1223         &attr_emulate_ua_intlck_ctrl,
1224         &attr_emulate_tas,
1225         &attr_emulate_tpu,
1226         &attr_emulate_tpws,
1227         &attr_emulate_caw,
1228         &attr_emulate_3pc,
1229         &attr_emulate_pr,
1230         &attr_pi_prot_type,
1231         &attr_hw_pi_prot_type,
1232         &attr_pi_prot_format,
1233         &attr_pi_prot_verify,
1234         &attr_enforce_pr_isids,
1235         &attr_is_nonrot,
1236         &attr_emulate_rest_reord,
1237         &attr_force_pr_aptpl,
1238         &attr_hw_block_size,
1239         &attr_block_size,
1240         &attr_hw_max_sectors,
1241         &attr_optimal_sectors,
1242         &attr_hw_queue_depth,
1243         &attr_queue_depth,
1244         &attr_max_unmap_lba_count,
1245         &attr_max_unmap_block_desc_count,
1246         &attr_unmap_granularity,
1247         &attr_unmap_granularity_alignment,
1248         &attr_unmap_zeroes_data,
1249         &attr_max_write_same_len,
1250         &attr_alua_support,
1251         &attr_pgr_support,
1252         NULL,
1253 };
1254 EXPORT_SYMBOL(sbc_attrib_attrs);
1255
1256 /*
1257  * Minimal dev_attrib attributes for devices passing through CDBs.
1258  * In this case we only provide a few read-only attributes for
1259  * backwards compatibility.
1260  */
1261 struct configfs_attribute *passthrough_attrib_attrs[] = {
1262         &attr_hw_pi_prot_type,
1263         &attr_hw_block_size,
1264         &attr_hw_max_sectors,
1265         &attr_hw_queue_depth,
1266         &attr_emulate_pr,
1267         &attr_alua_support,
1268         &attr_pgr_support,
1269         NULL,
1270 };
1271 EXPORT_SYMBOL(passthrough_attrib_attrs);
1272
1273 /*
1274  * pr related dev_attrib attributes for devices passing through CDBs,
1275  * but allowing in core pr emulation.
1276  */
1277 struct configfs_attribute *passthrough_pr_attrib_attrs[] = {
1278         &attr_enforce_pr_isids,
1279         &attr_force_pr_aptpl,
1280         NULL,
1281 };
1282 EXPORT_SYMBOL(passthrough_pr_attrib_attrs);
1283
1284 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL);
1285 TB_CIT_SETUP_DRV(dev_action, NULL, NULL);
1286
1287 /* End functions for struct config_item_type tb_dev_attrib_cit */
1288
1289 /*  Start functions for struct config_item_type tb_dev_wwn_cit */
1290
1291 static struct t10_wwn *to_t10_wwn(struct config_item *item)
1292 {
1293         return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group);
1294 }
1295
1296 static ssize_t target_check_inquiry_data(char *buf)
1297 {
1298         size_t len;
1299         int i;
1300
1301         len = strlen(buf);
1302
1303         /*
1304          * SPC 4.3.1:
1305          * ASCII data fields shall contain only ASCII printable characters
1306          * (i.e., code values 20h to 7Eh) and may be terminated with one or
1307          * more ASCII null (00h) characters.
1308          */
1309         for (i = 0; i < len; i++) {
1310                 if (buf[i] < 0x20 || buf[i] > 0x7E) {
1311                         pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n");
1312                         return -EINVAL;
1313                 }
1314         }
1315
1316         return len;
1317 }
1318
1319 /*
1320  * STANDARD and VPD page 0x83 T10 Vendor Identification
1321  */
1322 static ssize_t target_wwn_vendor_id_show(struct config_item *item,
1323                 char *page)
1324 {
1325         return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]);
1326 }
1327
1328 static ssize_t target_wwn_vendor_id_store(struct config_item *item,
1329                 const char *page, size_t count)
1330 {
1331         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1332         struct se_device *dev = t10_wwn->t10_dev;
1333         /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1334         unsigned char buf[INQUIRY_VENDOR_LEN + 2];
1335         char *stripped = NULL;
1336         size_t len;
1337         ssize_t ret;
1338
1339         len = strlcpy(buf, page, sizeof(buf));
1340         if (len < sizeof(buf)) {
1341                 /* Strip any newline added from userspace. */
1342                 stripped = strstrip(buf);
1343                 len = strlen(stripped);
1344         }
1345         if (len > INQUIRY_VENDOR_LEN) {
1346                 pr_err("Emulated T10 Vendor Identification exceeds"
1347                         " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN)
1348                         "\n");
1349                 return -EOVERFLOW;
1350         }
1351
1352         ret = target_check_inquiry_data(stripped);
1353
1354         if (ret < 0)
1355                 return ret;
1356
1357         /*
1358          * Check to see if any active exports exist.  If they do exist, fail
1359          * here as changing this information on the fly (underneath the
1360          * initiator side OS dependent multipath code) could cause negative
1361          * effects.
1362          */
1363         if (dev->export_count) {
1364                 pr_err("Unable to set T10 Vendor Identification while"
1365                         " active %d exports exist\n", dev->export_count);
1366                 return -EINVAL;
1367         }
1368
1369         BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1);
1370         strlcpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor));
1371
1372         pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:"
1373                  " %s\n", dev->t10_wwn.vendor);
1374
1375         return count;
1376 }
1377
1378 static ssize_t target_wwn_product_id_show(struct config_item *item,
1379                 char *page)
1380 {
1381         return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]);
1382 }
1383
1384 static ssize_t target_wwn_product_id_store(struct config_item *item,
1385                 const char *page, size_t count)
1386 {
1387         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1388         struct se_device *dev = t10_wwn->t10_dev;
1389         /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1390         unsigned char buf[INQUIRY_MODEL_LEN + 2];
1391         char *stripped = NULL;
1392         size_t len;
1393         ssize_t ret;
1394
1395         len = strlcpy(buf, page, sizeof(buf));
1396         if (len < sizeof(buf)) {
1397                 /* Strip any newline added from userspace. */
1398                 stripped = strstrip(buf);
1399                 len = strlen(stripped);
1400         }
1401         if (len > INQUIRY_MODEL_LEN) {
1402                 pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: "
1403                          __stringify(INQUIRY_MODEL_LEN)
1404                         "\n");
1405                 return -EOVERFLOW;
1406         }
1407
1408         ret = target_check_inquiry_data(stripped);
1409
1410         if (ret < 0)
1411                 return ret;
1412
1413         /*
1414          * Check to see if any active exports exist.  If they do exist, fail
1415          * here as changing this information on the fly (underneath the
1416          * initiator side OS dependent multipath code) could cause negative
1417          * effects.
1418          */
1419         if (dev->export_count) {
1420                 pr_err("Unable to set T10 Model while active %d exports exist\n",
1421                         dev->export_count);
1422                 return -EINVAL;
1423         }
1424
1425         BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
1426         strlcpy(dev->t10_wwn.model, stripped, sizeof(dev->t10_wwn.model));
1427
1428         pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n",
1429                  dev->t10_wwn.model);
1430
1431         return count;
1432 }
1433
1434 static ssize_t target_wwn_revision_show(struct config_item *item,
1435                 char *page)
1436 {
1437         return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]);
1438 }
1439
1440 static ssize_t target_wwn_revision_store(struct config_item *item,
1441                 const char *page, size_t count)
1442 {
1443         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1444         struct se_device *dev = t10_wwn->t10_dev;
1445         /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1446         unsigned char buf[INQUIRY_REVISION_LEN + 2];
1447         char *stripped = NULL;
1448         size_t len;
1449         ssize_t ret;
1450
1451         len = strlcpy(buf, page, sizeof(buf));
1452         if (len < sizeof(buf)) {
1453                 /* Strip any newline added from userspace. */
1454                 stripped = strstrip(buf);
1455                 len = strlen(stripped);
1456         }
1457         if (len > INQUIRY_REVISION_LEN) {
1458                 pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: "
1459                          __stringify(INQUIRY_REVISION_LEN)
1460                         "\n");
1461                 return -EOVERFLOW;
1462         }
1463
1464         ret = target_check_inquiry_data(stripped);
1465
1466         if (ret < 0)
1467                 return ret;
1468
1469         /*
1470          * Check to see if any active exports exist.  If they do exist, fail
1471          * here as changing this information on the fly (underneath the
1472          * initiator side OS dependent multipath code) could cause negative
1473          * effects.
1474          */
1475         if (dev->export_count) {
1476                 pr_err("Unable to set T10 Revision while active %d exports exist\n",
1477                         dev->export_count);
1478                 return -EINVAL;
1479         }
1480
1481         BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1);
1482         strlcpy(dev->t10_wwn.revision, stripped, sizeof(dev->t10_wwn.revision));
1483
1484         pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n",
1485                  dev->t10_wwn.revision);
1486
1487         return count;
1488 }
1489
1490 /*
1491  * VPD page 0x80 Unit serial
1492  */
1493 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item,
1494                 char *page)
1495 {
1496         return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1497                 &to_t10_wwn(item)->unit_serial[0]);
1498 }
1499
1500 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item,
1501                 const char *page, size_t count)
1502 {
1503         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1504         struct se_device *dev = t10_wwn->t10_dev;
1505         unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
1506
1507         /*
1508          * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1509          * from the struct scsi_device level firmware, do not allow
1510          * VPD Unit Serial to be emulated.
1511          *
1512          * Note this struct scsi_device could also be emulating VPD
1513          * information from its drivers/scsi LLD.  But for now we assume
1514          * it is doing 'the right thing' wrt a world wide unique
1515          * VPD Unit Serial Number that OS dependent multipath can depend on.
1516          */
1517         if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
1518                 pr_err("Underlying SCSI device firmware provided VPD"
1519                         " Unit Serial, ignoring request\n");
1520                 return -EOPNOTSUPP;
1521         }
1522
1523         if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
1524                 pr_err("Emulated VPD Unit Serial exceeds"
1525                 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1526                 return -EOVERFLOW;
1527         }
1528         /*
1529          * Check to see if any active $FABRIC_MOD exports exist.  If they
1530          * do exist, fail here as changing this information on the fly
1531          * (underneath the initiator side OS dependent multipath code)
1532          * could cause negative effects.
1533          */
1534         if (dev->export_count) {
1535                 pr_err("Unable to set VPD Unit Serial while"
1536                         " active %d $FABRIC_MOD exports exist\n",
1537                         dev->export_count);
1538                 return -EINVAL;
1539         }
1540
1541         /*
1542          * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1543          *
1544          * Also, strip any newline added from the userspace
1545          * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1546          */
1547         memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
1548         snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
1549         snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
1550                         "%s", strstrip(buf));
1551         dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
1552
1553         pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1554                         " %s\n", dev->t10_wwn.unit_serial);
1555
1556         return count;
1557 }
1558
1559 /*
1560  * VPD page 0x83 Protocol Identifier
1561  */
1562 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item,
1563                 char *page)
1564 {
1565         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1566         struct t10_vpd *vpd;
1567         unsigned char buf[VPD_TMP_BUF_SIZE];
1568         ssize_t len = 0;
1569
1570         memset(buf, 0, VPD_TMP_BUF_SIZE);
1571
1572         spin_lock(&t10_wwn->t10_vpd_lock);
1573         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
1574                 if (!vpd->protocol_identifier_set)
1575                         continue;
1576
1577                 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1578
1579                 if (len + strlen(buf) >= PAGE_SIZE)
1580                         break;
1581
1582                 len += sprintf(page+len, "%s", buf);
1583         }
1584         spin_unlock(&t10_wwn->t10_vpd_lock);
1585
1586         return len;
1587 }
1588
1589 /*
1590  * Generic wrapper for dumping VPD identifiers by association.
1591  */
1592 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc)                           \
1593 static ssize_t target_wwn_##_name##_show(struct config_item *item,      \
1594                 char *page)                                             \
1595 {                                                                       \
1596         struct t10_wwn *t10_wwn = to_t10_wwn(item);                     \
1597         struct t10_vpd *vpd;                                            \
1598         unsigned char buf[VPD_TMP_BUF_SIZE];                            \
1599         ssize_t len = 0;                                                \
1600                                                                         \
1601         spin_lock(&t10_wwn->t10_vpd_lock);                              \
1602         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {    \
1603                 if (vpd->association != _assoc)                         \
1604                         continue;                                       \
1605                                                                         \
1606                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
1607                 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE);   \
1608                 if (len + strlen(buf) >= PAGE_SIZE)                     \
1609                         break;                                          \
1610                 len += sprintf(page+len, "%s", buf);                    \
1611                                                                         \
1612                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
1613                 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1614                 if (len + strlen(buf) >= PAGE_SIZE)                     \
1615                         break;                                          \
1616                 len += sprintf(page+len, "%s", buf);                    \
1617                                                                         \
1618                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
1619                 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1620                 if (len + strlen(buf) >= PAGE_SIZE)                     \
1621                         break;                                          \
1622                 len += sprintf(page+len, "%s", buf);                    \
1623         }                                                               \
1624         spin_unlock(&t10_wwn->t10_vpd_lock);                            \
1625                                                                         \
1626         return len;                                                     \
1627 }
1628
1629 /* VPD page 0x83 Association: Logical Unit */
1630 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1631 /* VPD page 0x83 Association: Target Port */
1632 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1633 /* VPD page 0x83 Association: SCSI Target Device */
1634 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1635
1636 CONFIGFS_ATTR(target_wwn_, vendor_id);
1637 CONFIGFS_ATTR(target_wwn_, product_id);
1638 CONFIGFS_ATTR(target_wwn_, revision);
1639 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial);
1640 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier);
1641 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit);
1642 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port);
1643 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device);
1644
1645 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1646         &target_wwn_attr_vendor_id,
1647         &target_wwn_attr_product_id,
1648         &target_wwn_attr_revision,
1649         &target_wwn_attr_vpd_unit_serial,
1650         &target_wwn_attr_vpd_protocol_identifier,
1651         &target_wwn_attr_vpd_assoc_logical_unit,
1652         &target_wwn_attr_vpd_assoc_target_port,
1653         &target_wwn_attr_vpd_assoc_scsi_target_device,
1654         NULL,
1655 };
1656
1657 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs);
1658
1659 /*  End functions for struct config_item_type tb_dev_wwn_cit */
1660
1661 /*  Start functions for struct config_item_type tb_dev_pr_cit */
1662
1663 static struct se_device *pr_to_dev(struct config_item *item)
1664 {
1665         return container_of(to_config_group(item), struct se_device,
1666                         dev_pr_group);
1667 }
1668
1669 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1670                 char *page)
1671 {
1672         struct se_node_acl *se_nacl;
1673         struct t10_pr_registration *pr_reg;
1674         char i_buf[PR_REG_ISID_ID_LEN];
1675
1676         memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1677
1678         pr_reg = dev->dev_pr_res_holder;
1679         if (!pr_reg)
1680                 return sprintf(page, "No SPC-3 Reservation holder\n");
1681
1682         se_nacl = pr_reg->pr_reg_nacl;
1683         core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1684
1685         return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1686                 se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1687                 se_nacl->initiatorname, i_buf);
1688 }
1689
1690 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1691                 char *page)
1692 {
1693         struct se_session *sess = dev->reservation_holder;
1694         struct se_node_acl *se_nacl;
1695         ssize_t len;
1696
1697         if (sess) {
1698                 se_nacl = sess->se_node_acl;
1699                 len = sprintf(page,
1700                               "SPC-2 Reservation: %s Initiator: %s\n",
1701                               se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1702                               se_nacl->initiatorname);
1703         } else {
1704                 len = sprintf(page, "No SPC-2 Reservation holder\n");
1705         }
1706         return len;
1707 }
1708
1709 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page)
1710 {
1711         struct se_device *dev = pr_to_dev(item);
1712         int ret;
1713
1714         if (!dev->dev_attrib.emulate_pr)
1715                 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1716
1717         if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1718                 return sprintf(page, "Passthrough\n");
1719
1720         spin_lock(&dev->dev_reservation_lock);
1721         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1722                 ret = target_core_dev_pr_show_spc2_res(dev, page);
1723         else
1724                 ret = target_core_dev_pr_show_spc3_res(dev, page);
1725         spin_unlock(&dev->dev_reservation_lock);
1726         return ret;
1727 }
1728
1729 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item,
1730                 char *page)
1731 {
1732         struct se_device *dev = pr_to_dev(item);
1733         ssize_t len = 0;
1734
1735         spin_lock(&dev->dev_reservation_lock);
1736         if (!dev->dev_pr_res_holder) {
1737                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1738         } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1739                 len = sprintf(page, "SPC-3 Reservation: All Target"
1740                         " Ports registration\n");
1741         } else {
1742                 len = sprintf(page, "SPC-3 Reservation: Single"
1743                         " Target Port registration\n");
1744         }
1745
1746         spin_unlock(&dev->dev_reservation_lock);
1747         return len;
1748 }
1749
1750 static ssize_t target_pr_res_pr_generation_show(struct config_item *item,
1751                 char *page)
1752 {
1753         return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation);
1754 }
1755
1756
1757 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item,
1758                 char *page)
1759 {
1760         struct se_device *dev = pr_to_dev(item);
1761         struct se_node_acl *se_nacl;
1762         struct se_portal_group *se_tpg;
1763         struct t10_pr_registration *pr_reg;
1764         const struct target_core_fabric_ops *tfo;
1765         ssize_t len = 0;
1766
1767         spin_lock(&dev->dev_reservation_lock);
1768         pr_reg = dev->dev_pr_res_holder;
1769         if (!pr_reg) {
1770                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1771                 goto out_unlock;
1772         }
1773
1774         se_nacl = pr_reg->pr_reg_nacl;
1775         se_tpg = se_nacl->se_tpg;
1776         tfo = se_tpg->se_tpg_tfo;
1777
1778         len += sprintf(page+len, "SPC-3 Reservation: %s"
1779                 " Target Node Endpoint: %s\n", tfo->fabric_name,
1780                 tfo->tpg_get_wwn(se_tpg));
1781         len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1782                 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1783                 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
1784                 tfo->fabric_name, tfo->tpg_get_tag(se_tpg),
1785                 tfo->fabric_name, pr_reg->pr_aptpl_target_lun);
1786
1787 out_unlock:
1788         spin_unlock(&dev->dev_reservation_lock);
1789         return len;
1790 }
1791
1792
1793 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item,
1794                 char *page)
1795 {
1796         struct se_device *dev = pr_to_dev(item);
1797         const struct target_core_fabric_ops *tfo;
1798         struct t10_pr_registration *pr_reg;
1799         unsigned char buf[384];
1800         char i_buf[PR_REG_ISID_ID_LEN];
1801         ssize_t len = 0;
1802         int reg_count = 0;
1803
1804         len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1805
1806         spin_lock(&dev->t10_pr.registration_lock);
1807         list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1808                         pr_reg_list) {
1809
1810                 memset(buf, 0, 384);
1811                 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1812                 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1813                 core_pr_dump_initiator_port(pr_reg, i_buf,
1814                                         PR_REG_ISID_ID_LEN);
1815                 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1816                         tfo->fabric_name,
1817                         pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1818                         pr_reg->pr_res_generation);
1819
1820                 if (len + strlen(buf) >= PAGE_SIZE)
1821                         break;
1822
1823                 len += sprintf(page+len, "%s", buf);
1824                 reg_count++;
1825         }
1826         spin_unlock(&dev->t10_pr.registration_lock);
1827
1828         if (!reg_count)
1829                 len += sprintf(page+len, "None\n");
1830
1831         return len;
1832 }
1833
1834 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page)
1835 {
1836         struct se_device *dev = pr_to_dev(item);
1837         struct t10_pr_registration *pr_reg;
1838         ssize_t len = 0;
1839
1840         spin_lock(&dev->dev_reservation_lock);
1841         pr_reg = dev->dev_pr_res_holder;
1842         if (pr_reg) {
1843                 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1844                         core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1845         } else {
1846                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1847         }
1848
1849         spin_unlock(&dev->dev_reservation_lock);
1850         return len;
1851 }
1852
1853 static ssize_t target_pr_res_type_show(struct config_item *item, char *page)
1854 {
1855         struct se_device *dev = pr_to_dev(item);
1856
1857         if (!dev->dev_attrib.emulate_pr)
1858                 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1859         if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1860                 return sprintf(page, "SPC_PASSTHROUGH\n");
1861         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1862                 return sprintf(page, "SPC2_RESERVATIONS\n");
1863
1864         return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1865 }
1866
1867 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item,
1868                 char *page)
1869 {
1870         struct se_device *dev = pr_to_dev(item);
1871
1872         if (!dev->dev_attrib.emulate_pr ||
1873             (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1874                 return 0;
1875
1876         return sprintf(page, "APTPL Bit Status: %s\n",
1877                 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1878 }
1879
1880 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item,
1881                 char *page)
1882 {
1883         struct se_device *dev = pr_to_dev(item);
1884
1885         if (!dev->dev_attrib.emulate_pr ||
1886             (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1887                 return 0;
1888
1889         return sprintf(page, "Ready to process PR APTPL metadata..\n");
1890 }
1891
1892 enum {
1893         Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1894         Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1895         Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1896         Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1897 };
1898
1899 static match_table_t tokens = {
1900         {Opt_initiator_fabric, "initiator_fabric=%s"},
1901         {Opt_initiator_node, "initiator_node=%s"},
1902         {Opt_initiator_sid, "initiator_sid=%s"},
1903         {Opt_sa_res_key, "sa_res_key=%s"},
1904         {Opt_res_holder, "res_holder=%d"},
1905         {Opt_res_type, "res_type=%d"},
1906         {Opt_res_scope, "res_scope=%d"},
1907         {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1908         {Opt_mapped_lun, "mapped_lun=%u"},
1909         {Opt_target_fabric, "target_fabric=%s"},
1910         {Opt_target_node, "target_node=%s"},
1911         {Opt_tpgt, "tpgt=%d"},
1912         {Opt_port_rtpi, "port_rtpi=%d"},
1913         {Opt_target_lun, "target_lun=%u"},
1914         {Opt_err, NULL}
1915 };
1916
1917 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item,
1918                 const char *page, size_t count)
1919 {
1920         struct se_device *dev = pr_to_dev(item);
1921         unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1922         unsigned char *t_fabric = NULL, *t_port = NULL;
1923         char *orig, *ptr, *opts;
1924         substring_t args[MAX_OPT_ARGS];
1925         unsigned long long tmp_ll;
1926         u64 sa_res_key = 0;
1927         u64 mapped_lun = 0, target_lun = 0;
1928         int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1929         u16 tpgt = 0;
1930         u8 type = 0;
1931
1932         if (!dev->dev_attrib.emulate_pr ||
1933             (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1934                 return count;
1935         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1936                 return count;
1937
1938         if (dev->export_count) {
1939                 pr_debug("Unable to process APTPL metadata while"
1940                         " active fabric exports exist\n");
1941                 return -EINVAL;
1942         }
1943
1944         opts = kstrdup(page, GFP_KERNEL);
1945         if (!opts)
1946                 return -ENOMEM;
1947
1948         orig = opts;
1949         while ((ptr = strsep(&opts, ",\n")) != NULL) {
1950                 if (!*ptr)
1951                         continue;
1952
1953                 token = match_token(ptr, tokens, args);
1954                 switch (token) {
1955                 case Opt_initiator_fabric:
1956                         i_fabric = match_strdup(args);
1957                         if (!i_fabric) {
1958                                 ret = -ENOMEM;
1959                                 goto out;
1960                         }
1961                         break;
1962                 case Opt_initiator_node:
1963                         i_port = match_strdup(args);
1964                         if (!i_port) {
1965                                 ret = -ENOMEM;
1966                                 goto out;
1967                         }
1968                         if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1969                                 pr_err("APTPL metadata initiator_node="
1970                                         " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1971                                         PR_APTPL_MAX_IPORT_LEN);
1972                                 ret = -EINVAL;
1973                                 break;
1974                         }
1975                         break;
1976                 case Opt_initiator_sid:
1977                         isid = match_strdup(args);
1978                         if (!isid) {
1979                                 ret = -ENOMEM;
1980                                 goto out;
1981                         }
1982                         if (strlen(isid) >= PR_REG_ISID_LEN) {
1983                                 pr_err("APTPL metadata initiator_isid"
1984                                         "= exceeds PR_REG_ISID_LEN: %d\n",
1985                                         PR_REG_ISID_LEN);
1986                                 ret = -EINVAL;
1987                                 break;
1988                         }
1989                         break;
1990                 case Opt_sa_res_key:
1991                         ret = match_u64(args,  &tmp_ll);
1992                         if (ret < 0) {
1993                                 pr_err("kstrtoull() failed for sa_res_key=\n");
1994                                 goto out;
1995                         }
1996                         sa_res_key = (u64)tmp_ll;
1997                         break;
1998                 /*
1999                  * PR APTPL Metadata for Reservation
2000                  */
2001                 case Opt_res_holder:
2002                         ret = match_int(args, &arg);
2003                         if (ret)
2004                                 goto out;
2005                         res_holder = arg;
2006                         break;
2007                 case Opt_res_type:
2008                         ret = match_int(args, &arg);
2009                         if (ret)
2010                                 goto out;
2011                         type = (u8)arg;
2012                         break;
2013                 case Opt_res_scope:
2014                         ret = match_int(args, &arg);
2015                         if (ret)
2016                                 goto out;
2017                         break;
2018                 case Opt_res_all_tg_pt:
2019                         ret = match_int(args, &arg);
2020                         if (ret)
2021                                 goto out;
2022                         all_tg_pt = (int)arg;
2023                         break;
2024                 case Opt_mapped_lun:
2025                         ret = match_u64(args, &tmp_ll);
2026                         if (ret)
2027                                 goto out;
2028                         mapped_lun = (u64)tmp_ll;
2029                         break;
2030                 /*
2031                  * PR APTPL Metadata for Target Port
2032                  */
2033                 case Opt_target_fabric:
2034                         t_fabric = match_strdup(args);
2035                         if (!t_fabric) {
2036                                 ret = -ENOMEM;
2037                                 goto out;
2038                         }
2039                         break;
2040                 case Opt_target_node:
2041                         t_port = match_strdup(args);
2042                         if (!t_port) {
2043                                 ret = -ENOMEM;
2044                                 goto out;
2045                         }
2046                         if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
2047                                 pr_err("APTPL metadata target_node="
2048                                         " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
2049                                         PR_APTPL_MAX_TPORT_LEN);
2050                                 ret = -EINVAL;
2051                                 break;
2052                         }
2053                         break;
2054                 case Opt_tpgt:
2055                         ret = match_int(args, &arg);
2056                         if (ret)
2057                                 goto out;
2058                         tpgt = (u16)arg;
2059                         break;
2060                 case Opt_port_rtpi:
2061                         ret = match_int(args, &arg);
2062                         if (ret)
2063                                 goto out;
2064                         break;
2065                 case Opt_target_lun:
2066                         ret = match_u64(args, &tmp_ll);
2067                         if (ret)
2068                                 goto out;
2069                         target_lun = (u64)tmp_ll;
2070                         break;
2071                 default:
2072                         break;
2073                 }
2074         }
2075
2076         if (!i_port || !t_port || !sa_res_key) {
2077                 pr_err("Illegal parameters for APTPL registration\n");
2078                 ret = -EINVAL;
2079                 goto out;
2080         }
2081
2082         if (res_holder && !(type)) {
2083                 pr_err("Illegal PR type: 0x%02x for reservation"
2084                                 " holder\n", type);
2085                 ret = -EINVAL;
2086                 goto out;
2087         }
2088
2089         ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
2090                         i_port, isid, mapped_lun, t_port, tpgt, target_lun,
2091                         res_holder, all_tg_pt, type);
2092 out:
2093         kfree(i_fabric);
2094         kfree(i_port);
2095         kfree(isid);
2096         kfree(t_fabric);
2097         kfree(t_port);
2098         kfree(orig);
2099         return (ret == 0) ? count : ret;
2100 }
2101
2102
2103 CONFIGFS_ATTR_RO(target_pr_, res_holder);
2104 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts);
2105 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation);
2106 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port);
2107 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts);
2108 CONFIGFS_ATTR_RO(target_pr_, res_pr_type);
2109 CONFIGFS_ATTR_RO(target_pr_, res_type);
2110 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active);
2111 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata);
2112
2113 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
2114         &target_pr_attr_res_holder,
2115         &target_pr_attr_res_pr_all_tgt_pts,
2116         &target_pr_attr_res_pr_generation,
2117         &target_pr_attr_res_pr_holder_tg_port,
2118         &target_pr_attr_res_pr_registered_i_pts,
2119         &target_pr_attr_res_pr_type,
2120         &target_pr_attr_res_type,
2121         &target_pr_attr_res_aptpl_active,
2122         &target_pr_attr_res_aptpl_metadata,
2123         NULL,
2124 };
2125
2126 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs);
2127
2128 /*  End functions for struct config_item_type tb_dev_pr_cit */
2129
2130 /*  Start functions for struct config_item_type tb_dev_cit */
2131
2132 static inline struct se_device *to_device(struct config_item *item)
2133 {
2134         return container_of(to_config_group(item), struct se_device, dev_group);
2135 }
2136
2137 static ssize_t target_dev_info_show(struct config_item *item, char *page)
2138 {
2139         struct se_device *dev = to_device(item);
2140         int bl = 0;
2141         ssize_t read_bytes = 0;
2142
2143         transport_dump_dev_state(dev, page, &bl);
2144         read_bytes += bl;
2145         read_bytes += dev->transport->show_configfs_dev_params(dev,
2146                         page+read_bytes);
2147         return read_bytes;
2148 }
2149
2150 static ssize_t target_dev_control_store(struct config_item *item,
2151                 const char *page, size_t count)
2152 {
2153         struct se_device *dev = to_device(item);
2154
2155         return dev->transport->set_configfs_dev_params(dev, page, count);
2156 }
2157
2158 static ssize_t target_dev_alias_show(struct config_item *item, char *page)
2159 {
2160         struct se_device *dev = to_device(item);
2161
2162         if (!(dev->dev_flags & DF_USING_ALIAS))
2163                 return 0;
2164
2165         return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
2166 }
2167
2168 static ssize_t target_dev_alias_store(struct config_item *item,
2169                 const char *page, size_t count)
2170 {
2171         struct se_device *dev = to_device(item);
2172         struct se_hba *hba = dev->se_hba;
2173         ssize_t read_bytes;
2174
2175         if (count > (SE_DEV_ALIAS_LEN-1)) {
2176                 pr_err("alias count: %d exceeds"
2177                         " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
2178                         SE_DEV_ALIAS_LEN-1);
2179                 return -EINVAL;
2180         }
2181
2182         read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
2183         if (!read_bytes)
2184                 return -EINVAL;
2185         if (dev->dev_alias[read_bytes - 1] == '\n')
2186                 dev->dev_alias[read_bytes - 1] = '\0';
2187
2188         dev->dev_flags |= DF_USING_ALIAS;
2189
2190         pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
2191                 config_item_name(&hba->hba_group.cg_item),
2192                 config_item_name(&dev->dev_group.cg_item),
2193                 dev->dev_alias);
2194
2195         return read_bytes;
2196 }
2197
2198 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page)
2199 {
2200         struct se_device *dev = to_device(item);
2201
2202         if (!(dev->dev_flags & DF_USING_UDEV_PATH))
2203                 return 0;
2204
2205         return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
2206 }
2207
2208 static ssize_t target_dev_udev_path_store(struct config_item *item,
2209                 const char *page, size_t count)
2210 {
2211         struct se_device *dev = to_device(item);
2212         struct se_hba *hba = dev->se_hba;
2213         ssize_t read_bytes;
2214
2215         if (count > (SE_UDEV_PATH_LEN-1)) {
2216                 pr_err("udev_path count: %d exceeds"
2217                         " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
2218                         SE_UDEV_PATH_LEN-1);
2219                 return -EINVAL;
2220         }
2221
2222         read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
2223                         "%s", page);
2224         if (!read_bytes)
2225                 return -EINVAL;
2226         if (dev->udev_path[read_bytes - 1] == '\n')
2227                 dev->udev_path[read_bytes - 1] = '\0';
2228
2229         dev->dev_flags |= DF_USING_UDEV_PATH;
2230
2231         pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
2232                 config_item_name(&hba->hba_group.cg_item),
2233                 config_item_name(&dev->dev_group.cg_item),
2234                 dev->udev_path);
2235
2236         return read_bytes;
2237 }
2238
2239 static ssize_t target_dev_enable_show(struct config_item *item, char *page)
2240 {
2241         struct se_device *dev = to_device(item);
2242
2243         return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev));
2244 }
2245
2246 static ssize_t target_dev_enable_store(struct config_item *item,
2247                 const char *page, size_t count)
2248 {
2249         struct se_device *dev = to_device(item);
2250         char *ptr;
2251         int ret;
2252
2253         ptr = strstr(page, "1");
2254         if (!ptr) {
2255                 pr_err("For dev_enable ops, only valid value"
2256                                 " is \"1\"\n");
2257                 return -EINVAL;
2258         }
2259
2260         ret = target_configure_device(dev);
2261         if (ret)
2262                 return ret;
2263         return count;
2264 }
2265
2266 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page)
2267 {
2268         struct se_device *dev = to_device(item);
2269         struct config_item *lu_ci;
2270         struct t10_alua_lu_gp *lu_gp;
2271         struct t10_alua_lu_gp_member *lu_gp_mem;
2272         ssize_t len = 0;
2273
2274         lu_gp_mem = dev->dev_alua_lu_gp_mem;
2275         if (!lu_gp_mem)
2276                 return 0;
2277
2278         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2279         lu_gp = lu_gp_mem->lu_gp;
2280         if (lu_gp) {
2281                 lu_ci = &lu_gp->lu_gp_group.cg_item;
2282                 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
2283                         config_item_name(lu_ci), lu_gp->lu_gp_id);
2284         }
2285         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2286
2287         return len;
2288 }
2289
2290 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item,
2291                 const char *page, size_t count)
2292 {
2293         struct se_device *dev = to_device(item);
2294         struct se_hba *hba = dev->se_hba;
2295         struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
2296         struct t10_alua_lu_gp_member *lu_gp_mem;
2297         unsigned char buf[LU_GROUP_NAME_BUF];
2298         int move = 0;
2299
2300         lu_gp_mem = dev->dev_alua_lu_gp_mem;
2301         if (!lu_gp_mem)
2302                 return count;
2303
2304         if (count > LU_GROUP_NAME_BUF) {
2305                 pr_err("ALUA LU Group Alias too large!\n");
2306                 return -EINVAL;
2307         }
2308         memset(buf, 0, LU_GROUP_NAME_BUF);
2309         memcpy(buf, page, count);
2310         /*
2311          * Any ALUA logical unit alias besides "NULL" means we will be
2312          * making a new group association.
2313          */
2314         if (strcmp(strstrip(buf), "NULL")) {
2315                 /*
2316                  * core_alua_get_lu_gp_by_name() will increment reference to
2317                  * struct t10_alua_lu_gp.  This reference is released with
2318                  * core_alua_get_lu_gp_by_name below().
2319                  */
2320                 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
2321                 if (!lu_gp_new)
2322                         return -ENODEV;
2323         }
2324
2325         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2326         lu_gp = lu_gp_mem->lu_gp;
2327         if (lu_gp) {
2328                 /*
2329                  * Clearing an existing lu_gp association, and replacing
2330                  * with NULL
2331                  */
2332                 if (!lu_gp_new) {
2333                         pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
2334                                 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
2335                                 " %hu\n",
2336                                 config_item_name(&hba->hba_group.cg_item),
2337                                 config_item_name(&dev->dev_group.cg_item),
2338                                 config_item_name(&lu_gp->lu_gp_group.cg_item),
2339                                 lu_gp->lu_gp_id);
2340
2341                         __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2342                         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2343
2344                         return count;
2345                 }
2346                 /*
2347                  * Removing existing association of lu_gp_mem with lu_gp
2348                  */
2349                 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2350                 move = 1;
2351         }
2352         /*
2353          * Associate lu_gp_mem with lu_gp_new.
2354          */
2355         __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
2356         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2357
2358         pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
2359                 " core/alua/lu_gps/%s, ID: %hu\n",
2360                 (move) ? "Moving" : "Adding",
2361                 config_item_name(&hba->hba_group.cg_item),
2362                 config_item_name(&dev->dev_group.cg_item),
2363                 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
2364                 lu_gp_new->lu_gp_id);
2365
2366         core_alua_put_lu_gp_from_name(lu_gp_new);
2367         return count;
2368 }
2369
2370 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page)
2371 {
2372         struct se_device *dev = to_device(item);
2373         struct t10_alua_lba_map *map;
2374         struct t10_alua_lba_map_member *mem;
2375         char *b = page;
2376         int bl = 0;
2377         char state;
2378
2379         spin_lock(&dev->t10_alua.lba_map_lock);
2380         if (!list_empty(&dev->t10_alua.lba_map_list))
2381             bl += sprintf(b + bl, "%u %u\n",
2382                           dev->t10_alua.lba_map_segment_size,
2383                           dev->t10_alua.lba_map_segment_multiplier);
2384         list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
2385                 bl += sprintf(b + bl, "%llu %llu",
2386                               map->lba_map_first_lba, map->lba_map_last_lba);
2387                 list_for_each_entry(mem, &map->lba_map_mem_list,
2388                                     lba_map_mem_list) {
2389                         switch (mem->lba_map_mem_alua_state) {
2390                         case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
2391                                 state = 'O';
2392                                 break;
2393                         case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
2394                                 state = 'A';
2395                                 break;
2396                         case ALUA_ACCESS_STATE_STANDBY:
2397                                 state = 'S';
2398                                 break;
2399                         case ALUA_ACCESS_STATE_UNAVAILABLE:
2400                                 state = 'U';
2401                                 break;
2402                         default:
2403                                 state = '.';
2404                                 break;
2405                         }
2406                         bl += sprintf(b + bl, " %d:%c",
2407                                       mem->lba_map_mem_alua_pg_id, state);
2408                 }
2409                 bl += sprintf(b + bl, "\n");
2410         }
2411         spin_unlock(&dev->t10_alua.lba_map_lock);
2412         return bl;
2413 }
2414
2415 static ssize_t target_dev_lba_map_store(struct config_item *item,
2416                 const char *page, size_t count)
2417 {
2418         struct se_device *dev = to_device(item);
2419         struct t10_alua_lba_map *lba_map = NULL;
2420         struct list_head lba_list;
2421         char *map_entries, *orig, *ptr;
2422         char state;
2423         int pg_num = -1, pg;
2424         int ret = 0, num = 0, pg_id, alua_state;
2425         unsigned long start_lba = -1, end_lba = -1;
2426         unsigned long segment_size = -1, segment_mult = -1;
2427
2428         orig = map_entries = kstrdup(page, GFP_KERNEL);
2429         if (!map_entries)
2430                 return -ENOMEM;
2431
2432         INIT_LIST_HEAD(&lba_list);
2433         while ((ptr = strsep(&map_entries, "\n")) != NULL) {
2434                 if (!*ptr)
2435                         continue;
2436
2437                 if (num == 0) {
2438                         if (sscanf(ptr, "%lu %lu\n",
2439                                    &segment_size, &segment_mult) != 2) {
2440                                 pr_err("Invalid line %d\n", num);
2441                                 ret = -EINVAL;
2442                                 break;
2443                         }
2444                         num++;
2445                         continue;
2446                 }
2447                 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2448                         pr_err("Invalid line %d\n", num);
2449                         ret = -EINVAL;
2450                         break;
2451                 }
2452                 ptr = strchr(ptr, ' ');
2453                 if (!ptr) {
2454                         pr_err("Invalid line %d, missing end lba\n", num);
2455                         ret = -EINVAL;
2456                         break;
2457                 }
2458                 ptr++;
2459                 ptr = strchr(ptr, ' ');
2460                 if (!ptr) {
2461                         pr_err("Invalid line %d, missing state definitions\n",
2462                                num);
2463                         ret = -EINVAL;
2464                         break;
2465                 }
2466                 ptr++;
2467                 lba_map = core_alua_allocate_lba_map(&lba_list,
2468                                                      start_lba, end_lba);
2469                 if (IS_ERR(lba_map)) {
2470                         ret = PTR_ERR(lba_map);
2471                         break;
2472                 }
2473                 pg = 0;
2474                 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2475                         switch (state) {
2476                         case 'O':
2477                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2478                                 break;
2479                         case 'A':
2480                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2481                                 break;
2482                         case 'S':
2483                                 alua_state = ALUA_ACCESS_STATE_STANDBY;
2484                                 break;
2485                         case 'U':
2486                                 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2487                                 break;
2488                         default:
2489                                 pr_err("Invalid ALUA state '%c'\n", state);
2490                                 ret = -EINVAL;
2491                                 goto out;
2492                         }
2493
2494                         ret = core_alua_allocate_lba_map_mem(lba_map,
2495                                                              pg_id, alua_state);
2496                         if (ret) {
2497                                 pr_err("Invalid target descriptor %d:%c "
2498                                        "at line %d\n",
2499                                        pg_id, state, num);
2500                                 break;
2501                         }
2502                         pg++;
2503                         ptr = strchr(ptr, ' ');
2504                         if (ptr)
2505                                 ptr++;
2506                         else
2507                                 break;
2508                 }
2509                 if (pg_num == -1)
2510                     pg_num = pg;
2511                 else if (pg != pg_num) {
2512                         pr_err("Only %d from %d port groups definitions "
2513                                "at line %d\n", pg, pg_num, num);
2514                         ret = -EINVAL;
2515                         break;
2516                 }
2517                 num++;
2518         }
2519 out:
2520         if (ret) {
2521                 core_alua_free_lba_map(&lba_list);
2522                 count = ret;
2523         } else
2524                 core_alua_set_lba_map(dev, &lba_list,
2525                                       segment_size, segment_mult);
2526         kfree(orig);
2527         return count;
2528 }
2529
2530 CONFIGFS_ATTR_RO(target_dev_, info);
2531 CONFIGFS_ATTR_WO(target_dev_, control);
2532 CONFIGFS_ATTR(target_dev_, alias);
2533 CONFIGFS_ATTR(target_dev_, udev_path);
2534 CONFIGFS_ATTR(target_dev_, enable);
2535 CONFIGFS_ATTR(target_dev_, alua_lu_gp);
2536 CONFIGFS_ATTR(target_dev_, lba_map);
2537
2538 static struct configfs_attribute *target_core_dev_attrs[] = {
2539         &target_dev_attr_info,
2540         &target_dev_attr_control,
2541         &target_dev_attr_alias,
2542         &target_dev_attr_udev_path,
2543         &target_dev_attr_enable,
2544         &target_dev_attr_alua_lu_gp,
2545         &target_dev_attr_lba_map,
2546         NULL,
2547 };
2548
2549 static void target_core_dev_release(struct config_item *item)
2550 {
2551         struct config_group *dev_cg = to_config_group(item);
2552         struct se_device *dev =
2553                 container_of(dev_cg, struct se_device, dev_group);
2554
2555         target_free_device(dev);
2556 }
2557
2558 /*
2559  * Used in target_core_fabric_configfs.c to verify valid se_device symlink
2560  * within target_fabric_port_link()
2561  */
2562 struct configfs_item_operations target_core_dev_item_ops = {
2563         .release                = target_core_dev_release,
2564 };
2565
2566 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2567
2568 /* End functions for struct config_item_type tb_dev_cit */
2569
2570 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2571
2572 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item)
2573 {
2574         return container_of(to_config_group(item), struct t10_alua_lu_gp,
2575                         lu_gp_group);
2576 }
2577
2578 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page)
2579 {
2580         struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2581
2582         if (!lu_gp->lu_gp_valid_id)
2583                 return 0;
2584         return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2585 }
2586
2587 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item,
2588                 const char *page, size_t count)
2589 {
2590         struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2591         struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2592         unsigned long lu_gp_id;
2593         int ret;
2594
2595         ret = kstrtoul(page, 0, &lu_gp_id);
2596         if (ret < 0) {
2597                 pr_err("kstrtoul() returned %d for"
2598                         " lu_gp_id\n", ret);
2599                 return ret;
2600         }
2601         if (lu_gp_id > 0x0000ffff) {
2602                 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2603                         " 0x0000ffff\n", lu_gp_id);
2604                 return -EINVAL;
2605         }
2606
2607         ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2608         if (ret < 0)
2609                 return -EINVAL;
2610
2611         pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2612                 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2613                 config_item_name(&alua_lu_gp_cg->cg_item),
2614                 lu_gp->lu_gp_id);
2615
2616         return count;
2617 }
2618
2619 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
2620 {
2621         struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2622         struct se_device *dev;
2623         struct se_hba *hba;
2624         struct t10_alua_lu_gp_member *lu_gp_mem;
2625         ssize_t len = 0, cur_len;
2626         unsigned char buf[LU_GROUP_NAME_BUF];
2627
2628         memset(buf, 0, LU_GROUP_NAME_BUF);
2629
2630         spin_lock(&lu_gp->lu_gp_lock);
2631         list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2632                 dev = lu_gp_mem->lu_gp_mem_dev;
2633                 hba = dev->se_hba;
2634
2635                 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2636                         config_item_name(&hba->hba_group.cg_item),
2637                         config_item_name(&dev->dev_group.cg_item));
2638                 cur_len++; /* Extra byte for NULL terminator */
2639
2640                 if ((cur_len + len) > PAGE_SIZE) {
2641                         pr_warn("Ran out of lu_gp_show_attr"
2642                                 "_members buffer\n");
2643                         break;
2644                 }
2645                 memcpy(page+len, buf, cur_len);
2646                 len += cur_len;
2647         }
2648         spin_unlock(&lu_gp->lu_gp_lock);
2649
2650         return len;
2651 }
2652
2653 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id);
2654 CONFIGFS_ATTR_RO(target_lu_gp_, members);
2655
2656 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2657         &target_lu_gp_attr_lu_gp_id,
2658         &target_lu_gp_attr_members,
2659         NULL,
2660 };
2661
2662 static void target_core_alua_lu_gp_release(struct config_item *item)
2663 {
2664         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2665                         struct t10_alua_lu_gp, lu_gp_group);
2666
2667         core_alua_free_lu_gp(lu_gp);
2668 }
2669
2670 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2671         .release                = target_core_alua_lu_gp_release,
2672 };
2673
2674 static const struct config_item_type target_core_alua_lu_gp_cit = {
2675         .ct_item_ops            = &target_core_alua_lu_gp_ops,
2676         .ct_attrs               = target_core_alua_lu_gp_attrs,
2677         .ct_owner               = THIS_MODULE,
2678 };
2679
2680 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2681
2682 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2683
2684 static struct config_group *target_core_alua_create_lu_gp(
2685         struct config_group *group,
2686         const char *name)
2687 {
2688         struct t10_alua_lu_gp *lu_gp;
2689         struct config_group *alua_lu_gp_cg = NULL;
2690         struct config_item *alua_lu_gp_ci = NULL;
2691
2692         lu_gp = core_alua_allocate_lu_gp(name, 0);
2693         if (IS_ERR(lu_gp))
2694                 return NULL;
2695
2696         alua_lu_gp_cg = &lu_gp->lu_gp_group;
2697         alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2698
2699         config_group_init_type_name(alua_lu_gp_cg, name,
2700                         &target_core_alua_lu_gp_cit);
2701
2702         pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2703                 " Group: core/alua/lu_gps/%s\n",
2704                 config_item_name(alua_lu_gp_ci));
2705
2706         return alua_lu_gp_cg;
2707
2708 }
2709
2710 static void target_core_alua_drop_lu_gp(
2711         struct config_group *group,
2712         struct config_item *item)
2713 {
2714         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2715                         struct t10_alua_lu_gp, lu_gp_group);
2716
2717         pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2718                 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2719                 config_item_name(item), lu_gp->lu_gp_id);
2720         /*
2721          * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2722          * -> target_core_alua_lu_gp_release()
2723          */
2724         config_item_put(item);
2725 }
2726
2727 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2728         .make_group             = &target_core_alua_create_lu_gp,
2729         .drop_item              = &target_core_alua_drop_lu_gp,
2730 };
2731
2732 static const struct config_item_type target_core_alua_lu_gps_cit = {
2733         .ct_item_ops            = NULL,
2734         .ct_group_ops           = &target_core_alua_lu_gps_group_ops,
2735         .ct_owner               = THIS_MODULE,
2736 };
2737
2738 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2739
2740 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2741
2742 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item)
2743 {
2744         return container_of(to_config_group(item), struct t10_alua_tg_pt_gp,
2745                         tg_pt_gp_group);
2746 }
2747
2748 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item,
2749                 char *page)
2750 {
2751         return sprintf(page, "%d\n",
2752                        to_tg_pt_gp(item)->tg_pt_gp_alua_access_state);
2753 }
2754
2755 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item,
2756                 const char *page, size_t count)
2757 {
2758         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2759         struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2760         unsigned long tmp;
2761         int new_state, ret;
2762
2763         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2764                 pr_err("Unable to do implicit ALUA on non valid"
2765                         " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2766                 return -EINVAL;
2767         }
2768         if (!target_dev_configured(dev)) {
2769                 pr_err("Unable to set alua_access_state while device is"
2770                        " not configured\n");
2771                 return -ENODEV;
2772         }
2773
2774         ret = kstrtoul(page, 0, &tmp);
2775         if (ret < 0) {
2776                 pr_err("Unable to extract new ALUA access state from"
2777                                 " %s\n", page);
2778                 return ret;
2779         }
2780         new_state = (int)tmp;
2781
2782         if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2783                 pr_err("Unable to process implicit configfs ALUA"
2784                         " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2785                 return -EINVAL;
2786         }
2787         if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2788             new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2789                 /* LBA DEPENDENT is only allowed with implicit ALUA */
2790                 pr_err("Unable to process implicit configfs ALUA transition"
2791                        " while explicit ALUA management is enabled\n");
2792                 return -EINVAL;
2793         }
2794
2795         ret = core_alua_do_port_transition(tg_pt_gp, dev,
2796                                         NULL, NULL, new_state, 0);
2797         return (!ret) ? count : -EINVAL;
2798 }
2799
2800 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item,
2801                 char *page)
2802 {
2803         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2804         return sprintf(page, "%s\n",
2805                 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2806 }
2807
2808 static ssize_t target_tg_pt_gp_alua_access_status_store(
2809                 struct config_item *item, const char *page, size_t count)
2810 {
2811         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2812         unsigned long tmp;
2813         int new_status, ret;
2814
2815         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2816                 pr_err("Unable to do set ALUA access status on non"
2817                         " valid tg_pt_gp ID: %hu\n",
2818                         tg_pt_gp->tg_pt_gp_valid_id);
2819                 return -EINVAL;
2820         }
2821
2822         ret = kstrtoul(page, 0, &tmp);
2823         if (ret < 0) {
2824                 pr_err("Unable to extract new ALUA access status"
2825                                 " from %s\n", page);
2826                 return ret;
2827         }
2828         new_status = (int)tmp;
2829
2830         if ((new_status != ALUA_STATUS_NONE) &&
2831             (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2832             (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2833                 pr_err("Illegal ALUA access status: 0x%02x\n",
2834                                 new_status);
2835                 return -EINVAL;
2836         }
2837
2838         tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2839         return count;
2840 }
2841
2842 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item,
2843                 char *page)
2844 {
2845         return core_alua_show_access_type(to_tg_pt_gp(item), page);
2846 }
2847
2848 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item,
2849                 const char *page, size_t count)
2850 {
2851         return core_alua_store_access_type(to_tg_pt_gp(item), page, count);
2852 }
2853
2854 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit)                          \
2855 static ssize_t target_tg_pt_gp_alua_support_##_name##_show(             \
2856                 struct config_item *item, char *p)                      \
2857 {                                                                       \
2858         struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item);                \
2859         return sprintf(p, "%d\n",                                       \
2860                 !!(t->tg_pt_gp_alua_supported_states & _bit));          \
2861 }                                                                       \
2862                                                                         \
2863 static ssize_t target_tg_pt_gp_alua_support_##_name##_store(            \
2864                 struct config_item *item, const char *p, size_t c)      \
2865 {                                                                       \
2866         struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item);                \
2867         unsigned long tmp;                                              \
2868         int ret;                                                        \
2869                                                                         \
2870         if (!t->tg_pt_gp_valid_id) {                                    \
2871                 pr_err("Unable to do set " #_name " ALUA state on non"  \
2872                        " valid tg_pt_gp ID: %hu\n",                     \
2873                        t->tg_pt_gp_valid_id);                           \
2874                 return -EINVAL;                                         \
2875         }                                                               \
2876                                                                         \
2877         ret = kstrtoul(p, 0, &tmp);                                     \
2878         if (ret < 0) {                                                  \
2879                 pr_err("Invalid value '%s', must be '0' or '1'\n", p);  \
2880                 return -EINVAL;                                         \
2881         }                                                               \
2882         if (tmp > 1) {                                                  \
2883                 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2884                 return -EINVAL;                                         \
2885         }                                                               \
2886         if (tmp)                                                        \
2887                 t->tg_pt_gp_alua_supported_states |= _bit;              \
2888         else                                                            \
2889                 t->tg_pt_gp_alua_supported_states &= ~_bit;             \
2890                                                                         \
2891         return c;                                                       \
2892 }
2893
2894 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP);
2895 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP);
2896 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP);
2897 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP);
2898 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP);
2899 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP);
2900 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP);
2901
2902 static ssize_t target_tg_pt_gp_alua_write_metadata_show(
2903                 struct config_item *item, char *page)
2904 {
2905         return sprintf(page, "%d\n",
2906                 to_tg_pt_gp(item)->tg_pt_gp_write_metadata);
2907 }
2908
2909 static ssize_t target_tg_pt_gp_alua_write_metadata_store(
2910                 struct config_item *item, const char *page, size_t count)
2911 {
2912         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2913         unsigned long tmp;
2914         int ret;
2915
2916         ret = kstrtoul(page, 0, &tmp);
2917         if (ret < 0) {
2918                 pr_err("Unable to extract alua_write_metadata\n");
2919                 return ret;
2920         }
2921
2922         if ((tmp != 0) && (tmp != 1)) {
2923                 pr_err("Illegal value for alua_write_metadata:"
2924                         " %lu\n", tmp);
2925                 return -EINVAL;
2926         }
2927         tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2928
2929         return count;
2930 }
2931
2932 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item,
2933                 char *page)
2934 {
2935         return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page);
2936 }
2937
2938 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item,
2939                 const char *page, size_t count)
2940 {
2941         return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page,
2942                         count);
2943 }
2944
2945 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item,
2946                 char *page)
2947 {
2948         return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page);
2949 }
2950
2951 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item,
2952                 const char *page, size_t count)
2953 {
2954         return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page,
2955                         count);
2956 }
2957
2958 static ssize_t target_tg_pt_gp_implicit_trans_secs_show(
2959                 struct config_item *item, char *page)
2960 {
2961         return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page);
2962 }
2963
2964 static ssize_t target_tg_pt_gp_implicit_trans_secs_store(
2965                 struct config_item *item, const char *page, size_t count)
2966 {
2967         return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page,
2968                         count);
2969 }
2970
2971 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item,
2972                 char *page)
2973 {
2974         return core_alua_show_preferred_bit(to_tg_pt_gp(item), page);
2975 }
2976
2977 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item,
2978                 const char *page, size_t count)
2979 {
2980         return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count);
2981 }
2982
2983 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item,
2984                 char *page)
2985 {
2986         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2987
2988         if (!tg_pt_gp->tg_pt_gp_valid_id)
2989                 return 0;
2990         return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2991 }
2992
2993 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item,
2994                 const char *page, size_t count)
2995 {
2996         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2997         struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2998         unsigned long tg_pt_gp_id;
2999         int ret;
3000
3001         ret = kstrtoul(page, 0, &tg_pt_gp_id);
3002         if (ret < 0) {
3003                 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n",
3004                        page);
3005                 return ret;
3006         }
3007         if (tg_pt_gp_id > 0x0000ffff) {
3008                 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n",
3009                        tg_pt_gp_id);
3010                 return -EINVAL;
3011         }
3012
3013         ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
3014         if (ret < 0)
3015                 return -EINVAL;
3016
3017         pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
3018                 "core/alua/tg_pt_gps/%s to ID: %hu\n",
3019                 config_item_name(&alua_tg_pt_gp_cg->cg_item),
3020                 tg_pt_gp->tg_pt_gp_id);
3021
3022         return count;
3023 }
3024
3025 static ssize_t target_tg_pt_gp_members_show(struct config_item *item,
3026                 char *page)
3027 {
3028         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
3029         struct se_lun *lun;
3030         ssize_t len = 0, cur_len;
3031         unsigned char buf[TG_PT_GROUP_NAME_BUF];
3032
3033         memset(buf, 0, TG_PT_GROUP_NAME_BUF);
3034
3035         spin_lock(&tg_pt_gp->tg_pt_gp_lock);
3036         list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
3037                         lun_tg_pt_gp_link) {
3038                 struct se_portal_group *tpg = lun->lun_tpg;
3039
3040                 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
3041                         "/%s\n", tpg->se_tpg_tfo->fabric_name,
3042                         tpg->se_tpg_tfo->tpg_get_wwn(tpg),
3043                         tpg->se_tpg_tfo->tpg_get_tag(tpg),
3044                         config_item_name(&lun->lun_group.cg_item));
3045                 cur_len++; /* Extra byte for NULL terminator */
3046
3047                 if ((cur_len + len) > PAGE_SIZE) {
3048                         pr_warn("Ran out of lu_gp_show_attr"
3049                                 "_members buffer\n");
3050                         break;
3051                 }
3052                 memcpy(page+len, buf, cur_len);
3053                 len += cur_len;
3054         }
3055         spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
3056
3057         return len;
3058 }
3059
3060 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state);
3061 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status);
3062 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type);
3063 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning);
3064 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline);
3065 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent);
3066 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable);
3067 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby);
3068 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized);
3069 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized);
3070 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata);
3071 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs);
3072 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs);
3073 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs);
3074 CONFIGFS_ATTR(target_tg_pt_gp_, preferred);
3075 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id);
3076 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members);
3077
3078 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
3079         &target_tg_pt_gp_attr_alua_access_state,
3080         &target_tg_pt_gp_attr_alua_access_status,
3081         &target_tg_pt_gp_attr_alua_access_type,
3082         &target_tg_pt_gp_attr_alua_support_transitioning,
3083         &target_tg_pt_gp_attr_alua_support_offline,
3084         &target_tg_pt_gp_attr_alua_support_lba_dependent,
3085         &target_tg_pt_gp_attr_alua_support_unavailable,
3086         &target_tg_pt_gp_attr_alua_support_standby,
3087         &target_tg_pt_gp_attr_alua_support_active_nonoptimized,
3088         &target_tg_pt_gp_attr_alua_support_active_optimized,
3089         &target_tg_pt_gp_attr_alua_write_metadata,
3090         &target_tg_pt_gp_attr_nonop_delay_msecs,
3091         &target_tg_pt_gp_attr_trans_delay_msecs,
3092         &target_tg_pt_gp_attr_implicit_trans_secs,
3093         &target_tg_pt_gp_attr_preferred,
3094         &target_tg_pt_gp_attr_tg_pt_gp_id,
3095         &target_tg_pt_gp_attr_members,
3096         NULL,
3097 };
3098
3099 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
3100 {
3101         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3102                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3103
3104         core_alua_free_tg_pt_gp(tg_pt_gp);
3105 }
3106
3107 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
3108         .release                = target_core_alua_tg_pt_gp_release,
3109 };
3110
3111 static const struct config_item_type target_core_alua_tg_pt_gp_cit = {
3112         .ct_item_ops            = &target_core_alua_tg_pt_gp_ops,
3113         .ct_attrs               = target_core_alua_tg_pt_gp_attrs,
3114         .ct_owner               = THIS_MODULE,
3115 };
3116
3117 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
3118
3119 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3120
3121 static struct config_group *target_core_alua_create_tg_pt_gp(
3122         struct config_group *group,
3123         const char *name)
3124 {
3125         struct t10_alua *alua = container_of(group, struct t10_alua,
3126                                         alua_tg_pt_gps_group);
3127         struct t10_alua_tg_pt_gp *tg_pt_gp;
3128         struct config_group *alua_tg_pt_gp_cg = NULL;
3129         struct config_item *alua_tg_pt_gp_ci = NULL;
3130
3131         tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
3132         if (!tg_pt_gp)
3133                 return NULL;
3134
3135         alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
3136         alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
3137
3138         config_group_init_type_name(alua_tg_pt_gp_cg, name,
3139                         &target_core_alua_tg_pt_gp_cit);
3140
3141         pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
3142                 " Group: alua/tg_pt_gps/%s\n",
3143                 config_item_name(alua_tg_pt_gp_ci));
3144
3145         return alua_tg_pt_gp_cg;
3146 }
3147
3148 static void target_core_alua_drop_tg_pt_gp(
3149         struct config_group *group,
3150         struct config_item *item)
3151 {
3152         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3153                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3154
3155         pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
3156                 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
3157                 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
3158         /*
3159          * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
3160          * -> target_core_alua_tg_pt_gp_release().
3161          */
3162         config_item_put(item);
3163 }
3164
3165 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
3166         .make_group             = &target_core_alua_create_tg_pt_gp,
3167         .drop_item              = &target_core_alua_drop_tg_pt_gp,
3168 };
3169
3170 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
3171
3172 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3173
3174 /* Start functions for struct config_item_type target_core_alua_cit */
3175
3176 /*
3177  * target_core_alua_cit is a ConfigFS group that lives under
3178  * /sys/kernel/config/target/core/alua.  There are default groups
3179  * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
3180  * target_core_alua_cit in target_core_init_configfs() below.
3181  */
3182 static const struct config_item_type target_core_alua_cit = {
3183         .ct_item_ops            = NULL,
3184         .ct_attrs               = NULL,
3185         .ct_owner               = THIS_MODULE,
3186 };
3187
3188 /* End functions for struct config_item_type target_core_alua_cit */
3189
3190 /* Start functions for struct config_item_type tb_dev_stat_cit */
3191
3192 static struct config_group *target_core_stat_mkdir(
3193         struct config_group *group,
3194         const char *name)
3195 {
3196         return ERR_PTR(-ENOSYS);
3197 }
3198
3199 static void target_core_stat_rmdir(
3200         struct config_group *group,
3201         struct config_item *item)
3202 {
3203         return;
3204 }
3205
3206 static struct configfs_group_operations target_core_stat_group_ops = {
3207         .make_group             = &target_core_stat_mkdir,
3208         .drop_item              = &target_core_stat_rmdir,
3209 };
3210
3211 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
3212
3213 /* End functions for struct config_item_type tb_dev_stat_cit */
3214
3215 /* Start functions for struct config_item_type target_core_hba_cit */
3216
3217 static struct config_group *target_core_make_subdev(
3218         struct config_group *group,
3219         const char *name)
3220 {
3221         struct t10_alua_tg_pt_gp *tg_pt_gp;
3222         struct config_item *hba_ci = &group->cg_item;
3223         struct se_hba *hba = item_to_hba(hba_ci);
3224         struct target_backend *tb = hba->backend;
3225         struct se_device *dev;
3226         int errno = -ENOMEM, ret;
3227
3228         ret = mutex_lock_interruptible(&hba->hba_access_mutex);
3229         if (ret)
3230                 return ERR_PTR(ret);
3231
3232         dev = target_alloc_device(hba, name);
3233         if (!dev)
3234                 goto out_unlock;
3235
3236         config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit);
3237
3238         config_group_init_type_name(&dev->dev_action_group, "action",
3239                         &tb->tb_dev_action_cit);
3240         configfs_add_default_group(&dev->dev_action_group, &dev->dev_group);
3241
3242         config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
3243                         &tb->tb_dev_attrib_cit);
3244         configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group);
3245
3246         config_group_init_type_name(&dev->dev_pr_group, "pr",
3247                         &tb->tb_dev_pr_cit);
3248         configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group);
3249
3250         config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
3251                         &tb->tb_dev_wwn_cit);
3252         configfs_add_default_group(&dev->t10_wwn.t10_wwn_group,
3253                         &dev->dev_group);
3254
3255         config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
3256                         "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
3257         configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group,
3258                         &dev->dev_group);
3259
3260         config_group_init_type_name(&dev->dev_stat_grps.stat_group,
3261                         "statistics", &tb->tb_dev_stat_cit);
3262         configfs_add_default_group(&dev->dev_stat_grps.stat_group,
3263                         &dev->dev_group);
3264
3265         /*
3266          * Add core/$HBA/$DEV/alua/default_tg_pt_gp
3267          */
3268         tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
3269         if (!tg_pt_gp)
3270                 goto out_free_device;
3271         dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
3272
3273         config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
3274                         "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
3275         configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group,
3276                         &dev->t10_alua.alua_tg_pt_gps_group);
3277
3278         /*
3279          * Add core/$HBA/$DEV/statistics/ default groups
3280          */
3281         target_stat_setup_dev_default_groups(dev);
3282
3283         mutex_unlock(&hba->hba_access_mutex);
3284         return &dev->dev_group;
3285
3286 out_free_device:
3287         target_free_device(dev);
3288 out_unlock:
3289         mutex_unlock(&hba->hba_access_mutex);
3290         return ERR_PTR(errno);
3291 }
3292
3293 static void target_core_drop_subdev(
3294         struct config_group *group,
3295         struct config_item *item)
3296 {
3297         struct config_group *dev_cg = to_config_group(item);
3298         struct se_device *dev =
3299                 container_of(dev_cg, struct se_device, dev_group);
3300         struct se_hba *hba;
3301
3302         hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
3303
3304         mutex_lock(&hba->hba_access_mutex);
3305
3306         configfs_remove_default_groups(&dev->dev_stat_grps.stat_group);
3307         configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group);
3308
3309         /*
3310          * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
3311          * directly from target_core_alua_tg_pt_gp_release().
3312          */
3313         dev->t10_alua.default_tg_pt_gp = NULL;
3314
3315         configfs_remove_default_groups(dev_cg);
3316
3317         /*
3318          * se_dev is released from target_core_dev_item_ops->release()
3319          */
3320         config_item_put(item);
3321         mutex_unlock(&hba->hba_access_mutex);
3322 }
3323
3324 static struct configfs_group_operations target_core_hba_group_ops = {
3325         .make_group             = target_core_make_subdev,
3326         .drop_item              = target_core_drop_subdev,
3327 };
3328
3329
3330 static inline struct se_hba *to_hba(struct config_item *item)
3331 {
3332         return container_of(to_config_group(item), struct se_hba, hba_group);
3333 }
3334
3335 static ssize_t target_hba_info_show(struct config_item *item, char *page)
3336 {
3337         struct se_hba *hba = to_hba(item);
3338
3339         return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
3340                         hba->hba_id, hba->backend->ops->name,
3341                         TARGET_CORE_VERSION);
3342 }
3343
3344 static ssize_t target_hba_mode_show(struct config_item *item, char *page)
3345 {
3346         struct se_hba *hba = to_hba(item);
3347         int hba_mode = 0;
3348
3349         if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
3350                 hba_mode = 1;
3351
3352         return sprintf(page, "%d\n", hba_mode);
3353 }
3354
3355 static ssize_t target_hba_mode_store(struct config_item *item,
3356                 const char *page, size_t count)
3357 {
3358         struct se_hba *hba = to_hba(item);
3359         unsigned long mode_flag;
3360         int ret;
3361
3362         if (hba->backend->ops->pmode_enable_hba == NULL)
3363                 return -EINVAL;
3364
3365         ret = kstrtoul(page, 0, &mode_flag);
3366         if (ret < 0) {
3367                 pr_err("Unable to extract hba mode flag: %d\n", ret);
3368                 return ret;
3369         }
3370
3371         if (hba->dev_count) {
3372                 pr_err("Unable to set hba_mode with active devices\n");
3373                 return -EINVAL;
3374         }
3375
3376         ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
3377         if (ret < 0)
3378                 return -EINVAL;
3379         if (ret > 0)
3380                 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3381         else if (ret == 0)
3382                 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3383
3384         return count;
3385 }
3386
3387 CONFIGFS_ATTR_RO(target_, hba_info);
3388 CONFIGFS_ATTR(target_, hba_mode);
3389
3390 static void target_core_hba_release(struct config_item *item)
3391 {
3392         struct se_hba *hba = container_of(to_config_group(item),
3393                                 struct se_hba, hba_group);
3394         core_delete_hba(hba);
3395 }
3396
3397 static struct configfs_attribute *target_core_hba_attrs[] = {
3398         &target_attr_hba_info,
3399         &target_attr_hba_mode,
3400         NULL,
3401 };
3402
3403 static struct configfs_item_operations target_core_hba_item_ops = {
3404         .release                = target_core_hba_release,
3405 };
3406
3407 static const struct config_item_type target_core_hba_cit = {
3408         .ct_item_ops            = &target_core_hba_item_ops,
3409         .ct_group_ops           = &target_core_hba_group_ops,
3410         .ct_attrs               = target_core_hba_attrs,
3411         .ct_owner               = THIS_MODULE,
3412 };
3413
3414 static struct config_group *target_core_call_addhbatotarget(
3415         struct config_group *group,
3416         const char *name)
3417 {
3418         char *se_plugin_str, *str, *str2;
3419         struct se_hba *hba;
3420         char buf[TARGET_CORE_NAME_MAX_LEN];
3421         unsigned long plugin_dep_id = 0;
3422         int ret;
3423
3424         memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3425         if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3426                 pr_err("Passed *name strlen(): %d exceeds"
3427                         " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3428                         TARGET_CORE_NAME_MAX_LEN);
3429                 return ERR_PTR(-ENAMETOOLONG);
3430         }
3431         snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3432
3433         str = strstr(buf, "_");
3434         if (!str) {
3435                 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3436                 return ERR_PTR(-EINVAL);
3437         }
3438         se_plugin_str = buf;
3439         /*
3440          * Special case for subsystem plugins that have "_" in their names.
3441          * Namely rd_direct and rd_mcp..
3442          */
3443         str2 = strstr(str+1, "_");
3444         if (str2) {
3445                 *str2 = '\0'; /* Terminate for *se_plugin_str */
3446                 str2++; /* Skip to start of plugin dependent ID */
3447                 str = str2;
3448         } else {
3449                 *str = '\0'; /* Terminate for *se_plugin_str */
3450                 str++; /* Skip to start of plugin dependent ID */
3451         }
3452
3453         ret = kstrtoul(str, 0, &plugin_dep_id);
3454         if (ret < 0) {
3455                 pr_err("kstrtoul() returned %d for"
3456                                 " plugin_dep_id\n", ret);
3457                 return ERR_PTR(ret);
3458         }
3459         /*
3460          * Load up TCM subsystem plugins if they have not already been loaded.
3461          */
3462         transport_subsystem_check_init();
3463
3464         hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3465         if (IS_ERR(hba))
3466                 return ERR_CAST(hba);
3467
3468         config_group_init_type_name(&hba->hba_group, name,
3469                         &target_core_hba_cit);
3470
3471         return &hba->hba_group;
3472 }
3473
3474 static void target_core_call_delhbafromtarget(
3475         struct config_group *group,
3476         struct config_item *item)
3477 {
3478         /*
3479          * core_delete_hba() is called from target_core_hba_item_ops->release()
3480          * -> target_core_hba_release()
3481          */
3482         config_item_put(item);
3483 }
3484
3485 static struct configfs_group_operations target_core_group_ops = {
3486         .make_group     = target_core_call_addhbatotarget,
3487         .drop_item      = target_core_call_delhbafromtarget,
3488 };
3489
3490 static const struct config_item_type target_core_cit = {
3491         .ct_item_ops    = NULL,
3492         .ct_group_ops   = &target_core_group_ops,
3493         .ct_attrs       = NULL,
3494         .ct_owner       = THIS_MODULE,
3495 };
3496
3497 /* Stop functions for struct config_item_type target_core_hba_cit */
3498
3499 void target_setup_backend_cits(struct target_backend *tb)
3500 {
3501         target_core_setup_dev_cit(tb);
3502         target_core_setup_dev_action_cit(tb);
3503         target_core_setup_dev_attrib_cit(tb);
3504         target_core_setup_dev_pr_cit(tb);
3505         target_core_setup_dev_wwn_cit(tb);
3506         target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3507         target_core_setup_dev_stat_cit(tb);
3508 }
3509
3510 static void target_init_dbroot(void)
3511 {
3512         struct file *fp;
3513
3514         snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED);
3515         fp = filp_open(db_root_stage, O_RDONLY, 0);
3516         if (IS_ERR(fp)) {
3517                 pr_err("db_root: cannot open: %s\n", db_root_stage);
3518                 return;
3519         }
3520         if (!S_ISDIR(file_inode(fp)->i_mode)) {
3521                 filp_close(fp, NULL);
3522                 pr_err("db_root: not a valid directory: %s\n", db_root_stage);
3523                 return;
3524         }
3525         filp_close(fp, NULL);
3526
3527         strncpy(db_root, db_root_stage, DB_ROOT_LEN);
3528         pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
3529 }
3530
3531 static int __init target_core_init_configfs(void)
3532 {
3533         struct configfs_subsystem *subsys = &target_core_fabrics;
3534         struct t10_alua_lu_gp *lu_gp;
3535         int ret;
3536
3537         pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3538                 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3539                 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3540
3541         config_group_init(&subsys->su_group);
3542         mutex_init(&subsys->su_mutex);
3543
3544         ret = init_se_kmem_caches();
3545         if (ret < 0)
3546                 return ret;
3547         /*
3548          * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3549          * and ALUA Logical Unit Group and Target Port Group infrastructure.
3550          */
3551         config_group_init_type_name(&target_core_hbagroup, "core",
3552                         &target_core_cit);
3553         configfs_add_default_group(&target_core_hbagroup, &subsys->su_group);
3554
3555         /*
3556          * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3557          */
3558         config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit);
3559         configfs_add_default_group(&alua_group, &target_core_hbagroup);
3560
3561         /*
3562          * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3563          * groups under /sys/kernel/config/target/core/alua/
3564          */
3565         config_group_init_type_name(&alua_lu_gps_group, "lu_gps",
3566                         &target_core_alua_lu_gps_cit);
3567         configfs_add_default_group(&alua_lu_gps_group, &alua_group);
3568
3569         /*
3570          * Add core/alua/lu_gps/default_lu_gp
3571          */
3572         lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3573         if (IS_ERR(lu_gp)) {
3574                 ret = -ENOMEM;
3575                 goto out_global;
3576         }
3577
3578         config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3579                                 &target_core_alua_lu_gp_cit);
3580         configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group);
3581
3582         default_lu_gp = lu_gp;
3583
3584         /*
3585          * Register the target_core_mod subsystem with configfs.
3586          */
3587         ret = configfs_register_subsystem(subsys);
3588         if (ret < 0) {
3589                 pr_err("Error %d while registering subsystem %s\n",
3590                         ret, subsys->su_group.cg_item.ci_namebuf);
3591                 goto out_global;
3592         }
3593         pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3594                 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
3595                 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3596         /*
3597          * Register built-in RAMDISK subsystem logic for virtual LUN 0
3598          */
3599         ret = rd_module_init();
3600         if (ret < 0)
3601                 goto out;
3602
3603         ret = core_dev_setup_virtual_lun0();
3604         if (ret < 0)
3605                 goto out;
3606
3607         ret = target_xcopy_setup_pt();
3608         if (ret < 0)
3609                 goto out;
3610
3611         target_init_dbroot();
3612
3613         return 0;
3614
3615 out:
3616         configfs_unregister_subsystem(subsys);
3617         core_dev_release_virtual_lun0();
3618         rd_module_exit();
3619 out_global:
3620         if (default_lu_gp) {
3621                 core_alua_free_lu_gp(default_lu_gp);
3622                 default_lu_gp = NULL;
3623         }
3624         release_se_kmem_caches();
3625         return ret;
3626 }
3627
3628 static void __exit target_core_exit_configfs(void)
3629 {
3630         configfs_remove_default_groups(&alua_lu_gps_group);
3631         configfs_remove_default_groups(&alua_group);
3632         configfs_remove_default_groups(&target_core_hbagroup);
3633
3634         /*
3635          * We expect subsys->su_group.default_groups to be released
3636          * by configfs subsystem provider logic..
3637          */
3638         configfs_unregister_subsystem(&target_core_fabrics);
3639
3640         core_alua_free_lu_gp(default_lu_gp);
3641         default_lu_gp = NULL;
3642
3643         pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3644                         " Infrastructure\n");
3645
3646         core_dev_release_virtual_lun0();
3647         rd_module_exit();
3648         target_xcopy_release_pt();
3649         release_se_kmem_caches();
3650 }
3651
3652 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3653 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3654 MODULE_LICENSE("GPL");
3655
3656 module_init(target_core_init_configfs);
3657 module_exit(target_core_exit_configfs);