drivers/target/target_core_configfs.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*******************************************************************************
   3  * Filename:  target_core_configfs.c
   4  *
   5  * This file contains ConfigFS logic for the Generic Target Engine project.
   6  *
   7  * (c) Copyright 2008-2013 Datera, Inc.
   8  *
   9  * Nicholas A. Bellinger <nab@kernel.org>
  10  *
  11  * based on configfs Copyright (C) 2005 Oracle.  All rights reserved.
  12  *
  13  ****************************************************************************/
  14
  15 #include <linux/module.h>
  16 #include <linux/moduleparam.h>
  17 #include <generated/utsrelease.h>
  18 #include <linux/utsname.h>
  19 #include <linux/init.h>
  20 #include <linux/fs.h>
  21 #include <linux/namei.h>
  22 #include <linux/slab.h>
  23 #include <linux/types.h>
  24 #include <linux/delay.h>
  25 #include <linux/unistd.h>
  26 #include <linux/string.h>
  27 #include <linux/parser.h>
  28 #include <linux/syscalls.h>
  29 #include <linux/configfs.h>
  30 #include <linux/spinlock.h>
  31
  32 #include <target/target_core_base.h>
  33 #include <target/target_core_backend.h>
  34 #include <target/target_core_fabric.h>
  35
  36 #include "target_core_internal.h"
  37 #include "target_core_alua.h"
  38 #include "target_core_pr.h"
  39 #include "target_core_rd.h"
  40 #include "target_core_xcopy.h"
  41
  42 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs)              \
  43 static void target_core_setup_##_name##_cit(struct target_backend *tb)  \
  44 {                                                                       \
  45         struct config_item_type *cit = &tb->tb_##_name##_cit;           \
  46                                                                         \
  47         cit->ct_item_ops = _item_ops;                                   \
  48         cit->ct_group_ops = _group_ops;                                 \
  49         cit->ct_attrs = _attrs;                                         \
  50         cit->ct_owner = tb->ops->owner;                                 \
  51         pr_debug("Setup generic %s\n", __stringify(_name));             \
  52 }
  53
  54 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops)                  \
  55 static void target_core_setup_##_name##_cit(struct target_backend *tb)  \
  56 {                                                                       \
  57         struct config_item_type *cit = &tb->tb_##_name##_cit;           \
  58                                                                         \
  59         cit->ct_item_ops = _item_ops;                                   \
  60         cit->ct_group_ops = _group_ops;                                 \
  61         cit->ct_attrs = tb->ops->tb_##_name##_attrs;                    \
  62         cit->ct_owner = tb->ops->owner;                                 \
  63         pr_debug("Setup generic %s\n", __stringify(_name));             \
  64 }
  65
  66 extern struct t10_alua_lu_gp *default_lu_gp;
  67
  68 static LIST_HEAD(g_tf_list);
  69 static DEFINE_MUTEX(g_tf_lock);
  70
  71 static struct config_group target_core_hbagroup;
  72 static struct config_group alua_group;
  73 static struct config_group alua_lu_gps_group;
  74
  75 static inline struct se_hba *
  76 item_to_hba(struct config_item *item)
  77 {
  78         return container_of(to_config_group(item), struct se_hba, hba_group);
  79 }
  80
  81 /*
  82  * Attributes for /sys/kernel/config/target/
  83  */
  84 static ssize_t target_core_item_version_show(struct config_item *item,
  85                 char *page)
  86 {
  87         return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
  88                 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION,
  89                 utsname()->sysname, utsname()->machine);
  90 }
  91
  92 CONFIGFS_ATTR_RO(target_core_item_, version);
  93
  94 char db_root[DB_ROOT_LEN] = DB_ROOT_DEFAULT;
  95 static char db_root_stage[DB_ROOT_LEN];
  96
  97 static ssize_t target_core_item_dbroot_show(struct config_item *item,
  98                                             char *page)
  99 {
 100         return sprintf(page, "%s\n", db_root);
 101 }
 102
 103 static ssize_t target_core_item_dbroot_store(struct config_item *item,
 104                                         const char *page, size_t count)
 105 {
 106         ssize_t read_bytes;
 107         struct file *fp;
 108
 109         mutex_lock(&g_tf_lock);
 110         if (!list_empty(&g_tf_list)) {
 111                 mutex_unlock(&g_tf_lock);
 112                 pr_err("db_root: cannot be changed: target drivers registered");
 113                 return -EINVAL;
 114         }
 115
 116         if (count > (DB_ROOT_LEN - 1)) {
 117                 mutex_unlock(&g_tf_lock);
 118                 pr_err("db_root: count %d exceeds DB_ROOT_LEN-1: %u\n",
 119                        (int)count, DB_ROOT_LEN - 1);
 120                 return -EINVAL;
 121         }
 122
 123         read_bytes = snprintf(db_root_stage, DB_ROOT_LEN, "%s", page);
 124         if (!read_bytes) {
 125                 mutex_unlock(&g_tf_lock);
 126                 return -EINVAL;
 127         }
 128         if (db_root_stage[read_bytes - 1] == '\n')
 129                 db_root_stage[read_bytes - 1] = '\0';
 130
 131         /* validate new db root before accepting it */
 132         fp = filp_open(db_root_stage, O_RDONLY, 0);
 133         if (IS_ERR(fp)) {
 134                 mutex_unlock(&g_tf_lock);
 135                 pr_err("db_root: cannot open: %s\n", db_root_stage);
 136                 return -EINVAL;
 137         }
 138         if (!S_ISDIR(file_inode(fp)->i_mode)) {
 139                 filp_close(fp, NULL);
 140                 mutex_unlock(&g_tf_lock);
 141                 pr_err("db_root: not a directory: %s\n", db_root_stage);
 142                 return -EINVAL;
 143         }
 144         filp_close(fp, NULL);
 145
 146         strncpy(db_root, db_root_stage, read_bytes);
 147
 148         mutex_unlock(&g_tf_lock);
 149
 150         pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
 151
 152         return read_bytes;
 153 }
 154
 155 CONFIGFS_ATTR(target_core_item_, dbroot);
 156
 157 static struct target_fabric_configfs *target_core_get_fabric(
 158         const char *name)
 159 {
 160         struct target_fabric_configfs *tf;
 161
 162         if (!name)
 163                 return NULL;
 164
 165         mutex_lock(&g_tf_lock);
 166         list_for_each_entry(tf, &g_tf_list, tf_list) {
 167                 const char *cmp_name = tf->tf_ops->fabric_alias;
 168                 if (!cmp_name)
 169                         cmp_name = tf->tf_ops->fabric_name;
 170                 if (!strcmp(cmp_name, name)) {
 171                         atomic_inc(&tf->tf_access_cnt);
 172                         mutex_unlock(&g_tf_lock);
 173                         return tf;
 174                 }
 175         }
 176         mutex_unlock(&g_tf_lock);
 177
 178         return NULL;
 179 }
 180
 181 /*
 182  * Called from struct target_core_group_ops->make_group()
 183  */
 184 static struct config_group *target_core_register_fabric(
 185         struct config_group *group,
 186         const char *name)
 187 {
 188         struct target_fabric_configfs *tf;
 189         int ret;
 190
 191         pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
 192                         " %s\n", group, name);
 193
 194         tf = target_core_get_fabric(name);
 195         if (!tf) {
 196                 pr_debug("target_core_register_fabric() trying autoload for %s\n",
 197                          name);
 198
 199                 /*
 200                  * Below are some hardcoded request_module() calls to automatically
 201                  * local fabric modules when the following is called:
 202                  *
 203                  * mkdir -p /sys/kernel/config/target/$MODULE_NAME
 204                  *
 205                  * Note that this does not limit which TCM fabric module can be
 206                  * registered, but simply provids auto loading logic for modules with
 207                  * mkdir(2) system calls with known TCM fabric modules.
 208                  */
 209
 210                 if (!strncmp(name, "iscsi", 5)) {
 211                         /*
 212                          * Automatically load the LIO Target fabric module when the
 213                          * following is called:
 214                          *
 215                          * mkdir -p $CONFIGFS/target/iscsi
 216                          */
 217                         ret = request_module("iscsi_target_mod");
 218                         if (ret < 0) {
 219                                 pr_debug("request_module() failed for"
 220                                          " iscsi_target_mod.ko: %d\n", ret);
 221                                 return ERR_PTR(-EINVAL);
 222                         }
 223                 } else if (!strncmp(name, "loopback", 8)) {
 224                         /*
 225                          * Automatically load the tcm_loop fabric module when the
 226                          * following is called:
 227                          *
 228                          * mkdir -p $CONFIGFS/target/loopback
 229                          */
 230                         ret = request_module("tcm_loop");
 231                         if (ret < 0) {
 232                                 pr_debug("request_module() failed for"
 233                                          " tcm_loop.ko: %d\n", ret);
 234                                 return ERR_PTR(-EINVAL);
 235                         }
 236                 }
 237
 238                 tf = target_core_get_fabric(name);
 239         }
 240
 241         if (!tf) {
 242                 pr_debug("target_core_get_fabric() failed for %s\n",
 243                          name);
 244                 return ERR_PTR(-EINVAL);
 245         }
 246         pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
 247                         " %s\n", tf->tf_ops->fabric_name);
 248         /*
 249          * On a successful target_core_get_fabric() look, the returned
 250          * struct target_fabric_configfs *tf will contain a usage reference.
 251          */
 252         pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
 253                         &tf->tf_wwn_cit);
 254
 255         config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit);
 256
 257         config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
 258                         &tf->tf_discovery_cit);
 259         configfs_add_default_group(&tf->tf_disc_group, &tf->tf_group);
 260
 261         pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric: %s\n",
 262                  config_item_name(&tf->tf_group.cg_item));
 263         return &tf->tf_group;
 264 }
 265
 266 /*
 267  * Called from struct target_core_group_ops->drop_item()
 268  */
 269 static void target_core_deregister_fabric(
 270         struct config_group *group,
 271         struct config_item *item)
 272 {
 273         struct target_fabric_configfs *tf = container_of(
 274                 to_config_group(item), struct target_fabric_configfs, tf_group);
 275
 276         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
 277                 " tf list\n", config_item_name(item));
 278
 279         pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
 280                         " %s\n", tf->tf_ops->fabric_name);
 281         atomic_dec(&tf->tf_access_cnt);
 282
 283         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
 284                         " %s\n", config_item_name(item));
 285
 286         configfs_remove_default_groups(&tf->tf_group);
 287         config_item_put(item);
 288 }
 289
 290 static struct configfs_group_operations target_core_fabric_group_ops = {
 291         .make_group     = &target_core_register_fabric,
 292         .drop_item      = &target_core_deregister_fabric,
 293 };
 294
 295 /*
 296  * All item attributes appearing in /sys/kernel/target/ appear here.
 297  */
 298 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
 299         &target_core_item_attr_version,
 300         &target_core_item_attr_dbroot,
 301         NULL,
 302 };
 303
 304 /*
 305  * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
 306  */
 307 static const struct config_item_type target_core_fabrics_item = {
 308         .ct_group_ops   = &target_core_fabric_group_ops,
 309         .ct_attrs       = target_core_fabric_item_attrs,
 310         .ct_owner       = THIS_MODULE,
 311 };
 312
 313 static struct configfs_subsystem target_core_fabrics = {
 314         .su_group = {
 315                 .cg_item = {
 316                         .ci_namebuf = "target",
 317                         .ci_type = &target_core_fabrics_item,
 318                 },
 319         },
 320 };
 321
 322 int target_depend_item(struct config_item *item)
 323 {
 324         return configfs_depend_item(&target_core_fabrics, item);
 325 }
 326 EXPORT_SYMBOL(target_depend_item);
 327
 328 void target_undepend_item(struct config_item *item)
 329 {
 330         return configfs_undepend_item(item);
 331 }
 332 EXPORT_SYMBOL(target_undepend_item);
 333
 334 /*##############################################################################
 335 // Start functions called by external Target Fabrics Modules
 336 //############################################################################*/
 337
 338 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
 339 {
 340         if (tfo->fabric_alias) {
 341                 if (strlen(tfo->fabric_alias) >= TARGET_FABRIC_NAME_SIZE) {
 342                         pr_err("Passed alias: %s exceeds "
 343                                 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_alias);
 344                         return -EINVAL;
 345                 }
 346         }
 347         if (!tfo->fabric_name) {
 348                 pr_err("Missing tfo->fabric_name\n");
 349                 return -EINVAL;
 350         }
 351         if (strlen(tfo->fabric_name) >= TARGET_FABRIC_NAME_SIZE) {
 352                 pr_err("Passed name: %s exceeds "
 353                         "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_name);
 354                 return -EINVAL;
 355         }
 356         if (!tfo->tpg_get_wwn) {
 357                 pr_err("Missing tfo->tpg_get_wwn()\n");
 358                 return -EINVAL;
 359         }
 360         if (!tfo->tpg_get_tag) {
 361                 pr_err("Missing tfo->tpg_get_tag()\n");
 362                 return -EINVAL;
 363         }
 364         if (!tfo->tpg_check_demo_mode) {
 365                 pr_err("Missing tfo->tpg_check_demo_mode()\n");
 366                 return -EINVAL;
 367         }
 368         if (!tfo->tpg_check_demo_mode_cache) {
 369                 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
 370                 return -EINVAL;
 371         }
 372         if (!tfo->tpg_check_demo_mode_write_protect) {
 373                 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
 374                 return -EINVAL;
 375         }
 376         if (!tfo->tpg_check_prod_mode_write_protect) {
 377                 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
 378                 return -EINVAL;
 379         }
 380         if (!tfo->tpg_get_inst_index) {
 381                 pr_err("Missing tfo->tpg_get_inst_index()\n");
 382                 return -EINVAL;
 383         }
 384         if (!tfo->release_cmd) {
 385                 pr_err("Missing tfo->release_cmd()\n");
 386                 return -EINVAL;
 387         }
 388         if (!tfo->sess_get_index) {
 389                 pr_err("Missing tfo->sess_get_index()\n");
 390                 return -EINVAL;
 391         }
 392         if (!tfo->write_pending) {
 393                 pr_err("Missing tfo->write_pending()\n");
 394                 return -EINVAL;
 395         }
 396         if (!tfo->set_default_node_attributes) {
 397                 pr_err("Missing tfo->set_default_node_attributes()\n");
 398                 return -EINVAL;
 399         }
 400         if (!tfo->get_cmd_state) {
 401                 pr_err("Missing tfo->get_cmd_state()\n");
 402                 return -EINVAL;
 403         }
 404         if (!tfo->queue_data_in) {
 405                 pr_err("Missing tfo->queue_data_in()\n");
 406                 return -EINVAL;
 407         }
 408         if (!tfo->queue_status) {
 409                 pr_err("Missing tfo->queue_status()\n");
 410                 return -EINVAL;
 411         }
 412         if (!tfo->queue_tm_rsp) {
 413                 pr_err("Missing tfo->queue_tm_rsp()\n");
 414                 return -EINVAL;
 415         }
 416         if (!tfo->aborted_task) {
 417                 pr_err("Missing tfo->aborted_task()\n");
 418                 return -EINVAL;
 419         }
 420         if (!tfo->check_stop_free) {
 421                 pr_err("Missing tfo->check_stop_free()\n");
 422                 return -EINVAL;
 423         }
 424         /*
 425          * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
 426          * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
 427          * target_core_fabric_configfs.c WWN+TPG group context code.
 428          */
 429         if (!tfo->fabric_make_wwn) {
 430                 pr_err("Missing tfo->fabric_make_wwn()\n");
 431                 return -EINVAL;
 432         }
 433         if (!tfo->fabric_drop_wwn) {
 434                 pr_err("Missing tfo->fabric_drop_wwn()\n");
 435                 return -EINVAL;
 436         }
 437         if (!tfo->fabric_make_tpg) {
 438                 pr_err("Missing tfo->fabric_make_tpg()\n");
 439                 return -EINVAL;
 440         }
 441         if (!tfo->fabric_drop_tpg) {
 442                 pr_err("Missing tfo->fabric_drop_tpg()\n");
 443                 return -EINVAL;
 444         }
 445
 446         return 0;
 447 }
 448
 449 int target_register_template(const struct target_core_fabric_ops *fo)
 450 {
 451         struct target_fabric_configfs *tf;
 452         int ret;
 453
 454         ret = target_fabric_tf_ops_check(fo);
 455         if (ret)
 456                 return ret;
 457
 458         tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
 459         if (!tf) {
 460                 pr_err("%s: could not allocate memory!\n", __func__);
 461                 return -ENOMEM;
 462         }
 463
 464         INIT_LIST_HEAD(&tf->tf_list);
 465         atomic_set(&tf->tf_access_cnt, 0);
 466         tf->tf_ops = fo;
 467         target_fabric_setup_cits(tf);
 468
 469         mutex_lock(&g_tf_lock);
 470         list_add_tail(&tf->tf_list, &g_tf_list);
 471         mutex_unlock(&g_tf_lock);
 472
 473         return 0;
 474 }
 475 EXPORT_SYMBOL(target_register_template);
 476
 477 void target_unregister_template(const struct target_core_fabric_ops *fo)
 478 {
 479         struct target_fabric_configfs *t;
 480
 481         mutex_lock(&g_tf_lock);
 482         list_for_each_entry(t, &g_tf_list, tf_list) {
 483                 if (!strcmp(t->tf_ops->fabric_name, fo->fabric_name)) {
 484                         BUG_ON(atomic_read(&t->tf_access_cnt));
 485                         list_del(&t->tf_list);
 486                         mutex_unlock(&g_tf_lock);
 487                         /*
 488                          * Wait for any outstanding fabric se_deve_entry->rcu_head
 489                          * callbacks to complete post kfree_rcu(), before allowing
 490                          * fabric driver unload of TFO->module to proceed.
 491                          */
 492                         rcu_barrier();
 493                         kfree(t);
 494                         return;
 495                 }
 496         }
 497         mutex_unlock(&g_tf_lock);
 498 }
 499 EXPORT_SYMBOL(target_unregister_template);
 500
 501 /*##############################################################################
 502 // Stop functions called by external Target Fabrics Modules
 503 //############################################################################*/
 504
 505 static inline struct se_dev_attrib *to_attrib(struct config_item *item)
 506 {
 507         return container_of(to_config_group(item), struct se_dev_attrib,
 508                         da_group);
 509 }
 510
 511 /* Start functions for struct config_item_type tb_dev_attrib_cit */
 512 #define DEF_CONFIGFS_ATTRIB_SHOW(_name)                                 \
 513 static ssize_t _name##_show(struct config_item *item, char *page)       \
 514 {                                                                       \
 515         return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \
 516 }
 517
 518 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias);
 519 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo);
 520 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write);
 521 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read);
 522 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache);
 523 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl);
 524 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas);
 525 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu);
 526 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws);
 527 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw);
 528 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc);
 529 DEF_CONFIGFS_ATTRIB_SHOW(emulate_pr);
 530 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type);
 531 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type);
 532 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify);
 533 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids);
 534 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot);
 535 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord);
 536 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl);
 537 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size);
 538 DEF_CONFIGFS_ATTRIB_SHOW(block_size);
 539 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors);
 540 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors);
 541 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth);
 542 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth);
 543 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count);
 544 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count);
 545 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity);
 546 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment);
 547 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data);
 548 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len);
 549
 550 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name)                            \
 551 static ssize_t _name##_store(struct config_item *item, const char *page,\
 552                 size_t count)                                           \
 553 {                                                                       \
 554         struct se_dev_attrib *da = to_attrib(item);                     \
 555         u32 val;                                                        \
 556         int ret;                                                        \
 557                                                                         \
 558         ret = kstrtou32(page, 0, &val);                                 \
 559         if (ret < 0)                                                    \
 560                 return ret;                                             \
 561         da->_name = val;                                                \
 562         return count;                                                   \
 563 }
 564
 565 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count);
 566 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count);
 567 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity);
 568 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment);
 569 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len);
 570
 571 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name)                           \
 572 static ssize_t _name##_store(struct config_item *item, const char *page,        \
 573                 size_t count)                                           \
 574 {                                                                       \
 575         struct se_dev_attrib *da = to_attrib(item);                     \
 576         bool flag;                                                      \
 577         int ret;                                                        \
 578                                                                         \
 579         ret = strtobool(page, &flag);                                   \
 580         if (ret < 0)                                                    \
 581                 return ret;                                             \
 582         da->_name = flag;                                               \
 583         return count;                                                   \
 584 }
 585
 586 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write);
 587 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw);
 588 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc);
 589 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr);
 590 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids);
 591 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot);
 592
 593 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name)                           \
 594 static ssize_t _name##_store(struct config_item *item, const char *page,\
 595                 size_t count)                                           \
 596 {                                                                       \
 597         printk_once(KERN_WARNING                                        \
 598                 "ignoring deprecated %s attribute\n",                   \
 599                 __stringify(_name));                                    \
 600         return count;                                                   \
 601 }
 602
 603 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo);
 604 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read);
 605
 606 static void dev_set_t10_wwn_model_alias(struct se_device *dev)
 607 {
 608         const char *configname;
 609
 610         configname = config_item_name(&dev->dev_group.cg_item);
 611         if (strlen(configname) >= INQUIRY_MODEL_LEN) {
 612                 pr_warn("dev[%p]: Backstore name '%s' is too long for "
 613                         "INQUIRY_MODEL, truncating to 15 characters\n", dev,
 614                         configname);
 615         }
 616         /*
 617          * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1)
 618          * here without potentially breaking existing setups, so continue to
 619          * truncate one byte shorter than what can be carried in INQUIRY.
 620          */
 621         strlcpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN);
 622 }
 623
 624 static ssize_t emulate_model_alias_store(struct config_item *item,
 625                 const char *page, size_t count)
 626 {
 627         struct se_dev_attrib *da = to_attrib(item);
 628         struct se_device *dev = da->da_dev;
 629         bool flag;
 630         int ret;
 631
 632         if (dev->export_count) {
 633                 pr_err("dev[%p]: Unable to change model alias"
 634                         " while export_count is %d\n",
 635                         dev, dev->export_count);
 636                 return -EINVAL;
 637         }
 638
 639         ret = strtobool(page, &flag);
 640         if (ret < 0)
 641                 return ret;
 642
 643         BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
 644         if (flag) {
 645                 dev_set_t10_wwn_model_alias(dev);
 646         } else {
 647                 strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod,
 648                         sizeof(dev->t10_wwn.model));
 649         }
 650         da->emulate_model_alias = flag;
 651         return count;
 652 }
 653
 654 static ssize_t emulate_write_cache_store(struct config_item *item,
 655                 const char *page, size_t count)
 656 {
 657         struct se_dev_attrib *da = to_attrib(item);
 658         bool flag;
 659         int ret;
 660
 661         ret = strtobool(page, &flag);
 662         if (ret < 0)
 663                 return ret;
 664
 665         if (flag && da->da_dev->transport->get_write_cache) {
 666                 pr_err("emulate_write_cache not supported for this device\n");
 667                 return -EINVAL;
 668         }
 669
 670         da->emulate_write_cache = flag;
 671         pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
 672                         da->da_dev, flag);
 673         return count;
 674 }
 675
 676 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item,
 677                 const char *page, size_t count)
 678 {
 679         struct se_dev_attrib *da = to_attrib(item);
 680         u32 val;
 681         int ret;
 682
 683         ret = kstrtou32(page, 0, &val);
 684         if (ret < 0)
 685                 return ret;
 686
 687         if (val != TARGET_UA_INTLCK_CTRL_CLEAR
 688          && val != TARGET_UA_INTLCK_CTRL_NO_CLEAR
 689          && val != TARGET_UA_INTLCK_CTRL_ESTABLISH_UA) {
 690                 pr_err("Illegal value %d\n", val);
 691                 return -EINVAL;
 692         }
 693
 694         if (da->da_dev->export_count) {
 695                 pr_err("dev[%p]: Unable to change SE Device"
 696                         " UA_INTRLCK_CTRL while export_count is %d\n",
 697                         da->da_dev, da->da_dev->export_count);
 698                 return -EINVAL;
 699         }
 700         da->emulate_ua_intlck_ctrl = val;
 701         pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
 702                 da->da_dev, val);
 703         return count;
 704 }
 705
 706 static ssize_t emulate_tas_store(struct config_item *item,
 707                 const char *page, size_t count)
 708 {
 709         struct se_dev_attrib *da = to_attrib(item);
 710         bool flag;
 711         int ret;
 712
 713         ret = strtobool(page, &flag);
 714         if (ret < 0)
 715                 return ret;
 716
 717         if (da->da_dev->export_count) {
 718                 pr_err("dev[%p]: Unable to change SE Device TAS while"
 719                         " export_count is %d\n",
 720                         da->da_dev, da->da_dev->export_count);
 721                 return -EINVAL;
 722         }
 723         da->emulate_tas = flag;
 724         pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
 725                 da->da_dev, flag ? "Enabled" : "Disabled");
 726
 727         return count;
 728 }
 729
 730 static ssize_t emulate_tpu_store(struct config_item *item,
 731                 const char *page, size_t count)
 732 {
 733         struct se_dev_attrib *da = to_attrib(item);
 734         bool flag;
 735         int ret;
 736
 737         ret = strtobool(page, &flag);
 738         if (ret < 0)
 739                 return ret;
 740
 741         /*
 742          * We expect this value to be non-zero when generic Block Layer
 743          * Discard supported is detected iblock_create_virtdevice().
 744          */
 745         if (flag && !da->max_unmap_block_desc_count) {
 746                 pr_err("Generic Block Discard not supported\n");
 747                 return -ENOSYS;
 748         }
 749
 750         da->emulate_tpu = flag;
 751         pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
 752                 da->da_dev, flag);
 753         return count;
 754 }
 755
 756 static ssize_t emulate_tpws_store(struct config_item *item,
 757                 const char *page, size_t count)
 758 {
 759         struct se_dev_attrib *da = to_attrib(item);
 760         bool flag;
 761         int ret;
 762
 763         ret = strtobool(page, &flag);
 764         if (ret < 0)
 765                 return ret;
 766
 767         /*
 768          * We expect this value to be non-zero when generic Block Layer
 769          * Discard supported is detected iblock_create_virtdevice().
 770          */
 771         if (flag && !da->max_unmap_block_desc_count) {
 772                 pr_err("Generic Block Discard not supported\n");
 773                 return -ENOSYS;
 774         }
 775
 776         da->emulate_tpws = flag;
 777         pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
 778                                 da->da_dev, flag);
 779         return count;
 780 }
 781
 782 static ssize_t pi_prot_type_store(struct config_item *item,
 783                 const char *page, size_t count)
 784 {
 785         struct se_dev_attrib *da = to_attrib(item);
 786         int old_prot = da->pi_prot_type, ret;
 787         struct se_device *dev = da->da_dev;
 788         u32 flag;
 789
 790         ret = kstrtou32(page, 0, &flag);
 791         if (ret < 0)
 792                 return ret;
 793
 794         if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
 795                 pr_err("Illegal value %d for pi_prot_type\n", flag);
 796                 return -EINVAL;
 797         }
 798         if (flag == 2) {
 799                 pr_err("DIF TYPE2 protection currently not supported\n");
 800                 return -ENOSYS;
 801         }
 802         if (da->hw_pi_prot_type) {
 803                 pr_warn("DIF protection enabled on underlying hardware,"
 804                         " ignoring\n");
 805                 return count;
 806         }
 807         if (!dev->transport->init_prot || !dev->transport->free_prot) {
 808                 /* 0 is only allowed value for non-supporting backends */
 809                 if (flag == 0)
 810                         return count;
 811
 812                 pr_err("DIF protection not supported by backend: %s\n",
 813                        dev->transport->name);
 814                 return -ENOSYS;
 815         }
 816         if (!target_dev_configured(dev)) {
 817                 pr_err("DIF protection requires device to be configured\n");
 818                 return -ENODEV;
 819         }
 820         if (dev->export_count) {
 821                 pr_err("dev[%p]: Unable to change SE Device PROT type while"
 822                        " export_count is %d\n", dev, dev->export_count);
 823                 return -EINVAL;
 824         }
 825
 826         da->pi_prot_type = flag;
 827
 828         if (flag && !old_prot) {
 829                 ret = dev->transport->init_prot(dev);
 830                 if (ret) {
 831                         da->pi_prot_type = old_prot;
 832                         da->pi_prot_verify = (bool) da->pi_prot_type;
 833                         return ret;
 834                 }
 835
 836         } else if (!flag && old_prot) {
 837                 dev->transport->free_prot(dev);
 838         }
 839
 840         da->pi_prot_verify = (bool) da->pi_prot_type;
 841         pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
 842         return count;
 843 }
 844
 845 /* always zero, but attr needs to remain RW to avoid userspace breakage */
 846 static ssize_t pi_prot_format_show(struct config_item *item, char *page)
 847 {
 848         return snprintf(page, PAGE_SIZE, "0\n");
 849 }
 850
 851 static ssize_t pi_prot_format_store(struct config_item *item,
 852                 const char *page, size_t count)
 853 {
 854         struct se_dev_attrib *da = to_attrib(item);
 855         struct se_device *dev = da->da_dev;
 856         bool flag;
 857         int ret;
 858
 859         ret = strtobool(page, &flag);
 860         if (ret < 0)
 861                 return ret;
 862
 863         if (!flag)
 864                 return count;
 865
 866         if (!dev->transport->format_prot) {
 867                 pr_err("DIF protection format not supported by backend %s\n",
 868                        dev->transport->name);
 869                 return -ENOSYS;
 870         }
 871         if (!target_dev_configured(dev)) {
 872                 pr_err("DIF protection format requires device to be configured\n");
 873                 return -ENODEV;
 874         }
 875         if (dev->export_count) {
 876                 pr_err("dev[%p]: Unable to format SE Device PROT type while"
 877                        " export_count is %d\n", dev, dev->export_count);
 878                 return -EINVAL;
 879         }
 880
 881         ret = dev->transport->format_prot(dev);
 882         if (ret)
 883                 return ret;
 884
 885         pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
 886         return count;
 887 }
 888
 889 static ssize_t pi_prot_verify_store(struct config_item *item,
 890                 const char *page, size_t count)
 891 {
 892         struct se_dev_attrib *da = to_attrib(item);
 893         bool flag;
 894         int ret;
 895
 896         ret = strtobool(page, &flag);
 897         if (ret < 0)
 898                 return ret;
 899
 900         if (!flag) {
 901                 da->pi_prot_verify = flag;
 902                 return count;
 903         }
 904         if (da->hw_pi_prot_type) {
 905                 pr_warn("DIF protection enabled on underlying hardware,"
 906                         " ignoring\n");
 907                 return count;
 908         }
 909         if (!da->pi_prot_type) {
 910                 pr_warn("DIF protection not supported by backend, ignoring\n");
 911                 return count;
 912         }
 913         da->pi_prot_verify = flag;
 914
 915         return count;
 916 }
 917
 918 static ssize_t force_pr_aptpl_store(struct config_item *item,
 919                 const char *page, size_t count)
 920 {
 921         struct se_dev_attrib *da = to_attrib(item);
 922         bool flag;
 923         int ret;
 924
 925         ret = strtobool(page, &flag);
 926         if (ret < 0)
 927                 return ret;
 928         if (da->da_dev->export_count) {
 929                 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
 930                        " export_count is %d\n",
 931                        da->da_dev, da->da_dev->export_count);
 932                 return -EINVAL;
 933         }
 934
 935         da->force_pr_aptpl = flag;
 936         pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag);
 937         return count;
 938 }
 939
 940 static ssize_t emulate_rest_reord_store(struct config_item *item,
 941                 const char *page, size_t count)
 942 {
 943         struct se_dev_attrib *da = to_attrib(item);
 944         bool flag;
 945         int ret;
 946
 947         ret = strtobool(page, &flag);
 948         if (ret < 0)
 949                 return ret;
 950
 951         if (flag != 0) {
 952                 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted"
 953                         " reordering not implemented\n", da->da_dev);
 954                 return -ENOSYS;
 955         }
 956         da->emulate_rest_reord = flag;
 957         pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
 958                 da->da_dev, flag);
 959         return count;
 960 }
 961
 962 static ssize_t unmap_zeroes_data_store(struct config_item *item,
 963                 const char *page, size_t count)
 964 {
 965         struct se_dev_attrib *da = to_attrib(item);
 966         bool flag;
 967         int ret;
 968
 969         ret = strtobool(page, &flag);
 970         if (ret < 0)
 971                 return ret;
 972
 973         if (da->da_dev->export_count) {
 974                 pr_err("dev[%p]: Unable to change SE Device"
 975                        " unmap_zeroes_data while export_count is %d\n",
 976                        da->da_dev, da->da_dev->export_count);
 977                 return -EINVAL;
 978         }
 979         /*
 980          * We expect this value to be non-zero when generic Block Layer
 981          * Discard supported is detected iblock_configure_device().
 982          */
 983         if (flag && !da->max_unmap_block_desc_count) {
 984                 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set"
 985                        " because max_unmap_block_desc_count is zero\n",
 986                        da->da_dev);
 987                 return -ENOSYS;
 988         }
 989         da->unmap_zeroes_data = flag;
 990         pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n",
 991                  da->da_dev, flag);
 992         return count;
 993 }
 994
 995 /*
 996  * Note, this can only be called on unexported SE Device Object.
 997  */
 998 static ssize_t queue_depth_store(struct config_item *item,
 999                 const char *page, size_t count)
1000 {
1001         struct se_dev_attrib *da = to_attrib(item);
1002         struct se_device *dev = da->da_dev;
1003         u32 val;
1004         int ret;
1005
1006         ret = kstrtou32(page, 0, &val);
1007         if (ret < 0)
1008                 return ret;
1009
1010         if (dev->export_count) {
1011                 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1012                         " export_count is %d\n",
1013                         dev, dev->export_count);
1014                 return -EINVAL;
1015         }
1016         if (!val) {
1017                 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
1018                 return -EINVAL;
1019         }
1020
1021         if (val > dev->dev_attrib.queue_depth) {
1022                 if (val > dev->dev_attrib.hw_queue_depth) {
1023                         pr_err("dev[%p]: Passed queue_depth:"
1024                                 " %u exceeds TCM/SE_Device MAX"
1025                                 " TCQ: %u\n", dev, val,
1026                                 dev->dev_attrib.hw_queue_depth);
1027                         return -EINVAL;
1028                 }
1029         }
1030         da->queue_depth = dev->queue_depth = val;
1031         pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val);
1032         return count;
1033 }
1034
1035 static ssize_t optimal_sectors_store(struct config_item *item,
1036                 const char *page, size_t count)
1037 {
1038         struct se_dev_attrib *da = to_attrib(item);
1039         u32 val;
1040         int ret;
1041
1042         ret = kstrtou32(page, 0, &val);
1043         if (ret < 0)
1044                 return ret;
1045
1046         if (da->da_dev->export_count) {
1047                 pr_err("dev[%p]: Unable to change SE Device"
1048                         " optimal_sectors while export_count is %d\n",
1049                         da->da_dev, da->da_dev->export_count);
1050                 return -EINVAL;
1051         }
1052         if (val > da->hw_max_sectors) {
1053                 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1054                         " greater than hw_max_sectors: %u\n",
1055                         da->da_dev, val, da->hw_max_sectors);
1056                 return -EINVAL;
1057         }
1058
1059         da->optimal_sectors = val;
1060         pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1061                         da->da_dev, val);
1062         return count;
1063 }
1064
1065 static ssize_t block_size_store(struct config_item *item,
1066                 const char *page, size_t count)
1067 {
1068         struct se_dev_attrib *da = to_attrib(item);
1069         u32 val;
1070         int ret;
1071
1072         ret = kstrtou32(page, 0, &val);
1073         if (ret < 0)
1074                 return ret;
1075
1076         if (da->da_dev->export_count) {
1077                 pr_err("dev[%p]: Unable to change SE Device block_size"
1078                         " while export_count is %d\n",
1079                         da->da_dev, da->da_dev->export_count);
1080                 return -EINVAL;
1081         }
1082
1083         if (val != 512 && val != 1024 && val != 2048 && val != 4096) {
1084                 pr_err("dev[%p]: Illegal value for block_device: %u"
1085                         " for SE device, must be 512, 1024, 2048 or 4096\n",
1086                         da->da_dev, val);
1087                 return -EINVAL;
1088         }
1089
1090         da->block_size = val;
1091         if (da->max_bytes_per_io)
1092                 da->hw_max_sectors = da->max_bytes_per_io / val;
1093
1094         pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1095                         da->da_dev, val);
1096         return count;
1097 }
1098
1099 static ssize_t alua_support_show(struct config_item *item, char *page)
1100 {
1101         struct se_dev_attrib *da = to_attrib(item);
1102         u8 flags = da->da_dev->transport_flags;
1103
1104         return snprintf(page, PAGE_SIZE, "%d\n",
1105                         flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1);
1106 }
1107
1108 static ssize_t alua_support_store(struct config_item *item,
1109                 const char *page, size_t count)
1110 {
1111         struct se_dev_attrib *da = to_attrib(item);
1112         struct se_device *dev = da->da_dev;
1113         bool flag;
1114         int ret;
1115
1116         if (!(dev->transport->transport_flags_changeable &
1117               TRANSPORT_FLAG_PASSTHROUGH_ALUA)) {
1118                 pr_err("dev[%p]: Unable to change SE Device alua_support:"
1119                         " alua_support has fixed value\n", dev);
1120                 return -EINVAL;
1121         }
1122
1123         ret = strtobool(page, &flag);
1124         if (ret < 0)
1125                 return ret;
1126
1127         if (flag)
1128                 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_ALUA;
1129         else
1130                 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_ALUA;
1131         return count;
1132 }
1133
1134 static ssize_t pgr_support_show(struct config_item *item, char *page)
1135 {
1136         struct se_dev_attrib *da = to_attrib(item);
1137         u8 flags = da->da_dev->transport_flags;
1138
1139         return snprintf(page, PAGE_SIZE, "%d\n",
1140                         flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1);
1141 }
1142
1143 static ssize_t pgr_support_store(struct config_item *item,
1144                 const char *page, size_t count)
1145 {
1146         struct se_dev_attrib *da = to_attrib(item);
1147         struct se_device *dev = da->da_dev;
1148         bool flag;
1149         int ret;
1150
1151         if (!(dev->transport->transport_flags_changeable &
1152               TRANSPORT_FLAG_PASSTHROUGH_PGR)) {
1153                 pr_err("dev[%p]: Unable to change SE Device pgr_support:"
1154                         " pgr_support has fixed value\n", dev);
1155                 return -EINVAL;
1156         }
1157
1158         ret = strtobool(page, &flag);
1159         if (ret < 0)
1160                 return ret;
1161
1162         if (flag)
1163                 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_PGR;
1164         else
1165                 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_PGR;
1166         return count;
1167 }
1168
1169 CONFIGFS_ATTR(, emulate_model_alias);
1170 CONFIGFS_ATTR(, emulate_dpo);
1171 CONFIGFS_ATTR(, emulate_fua_write);
1172 CONFIGFS_ATTR(, emulate_fua_read);
1173 CONFIGFS_ATTR(, emulate_write_cache);
1174 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl);
1175 CONFIGFS_ATTR(, emulate_tas);
1176 CONFIGFS_ATTR(, emulate_tpu);
1177 CONFIGFS_ATTR(, emulate_tpws);
1178 CONFIGFS_ATTR(, emulate_caw);
1179 CONFIGFS_ATTR(, emulate_3pc);
1180 CONFIGFS_ATTR(, emulate_pr);
1181 CONFIGFS_ATTR(, pi_prot_type);
1182 CONFIGFS_ATTR_RO(, hw_pi_prot_type);
1183 CONFIGFS_ATTR(, pi_prot_format);
1184 CONFIGFS_ATTR(, pi_prot_verify);
1185 CONFIGFS_ATTR(, enforce_pr_isids);
1186 CONFIGFS_ATTR(, is_nonrot);
1187 CONFIGFS_ATTR(, emulate_rest_reord);
1188 CONFIGFS_ATTR(, force_pr_aptpl);
1189 CONFIGFS_ATTR_RO(, hw_block_size);
1190 CONFIGFS_ATTR(, block_size);
1191 CONFIGFS_ATTR_RO(, hw_max_sectors);
1192 CONFIGFS_ATTR(, optimal_sectors);
1193 CONFIGFS_ATTR_RO(, hw_queue_depth);
1194 CONFIGFS_ATTR(, queue_depth);
1195 CONFIGFS_ATTR(, max_unmap_lba_count);
1196 CONFIGFS_ATTR(, max_unmap_block_desc_count);
1197 CONFIGFS_ATTR(, unmap_granularity);
1198 CONFIGFS_ATTR(, unmap_granularity_alignment);
1199 CONFIGFS_ATTR(, unmap_zeroes_data);
1200 CONFIGFS_ATTR(, max_write_same_len);
1201 CONFIGFS_ATTR(, alua_support);
1202 CONFIGFS_ATTR(, pgr_support);
1203
1204 /*
1205  * dev_attrib attributes for devices using the target core SBC/SPC
1206  * interpreter.  Any backend using spc_parse_cdb should be using
1207  * these.
1208  */
1209 struct configfs_attribute *sbc_attrib_attrs[] = {
1210         &attr_emulate_model_alias,
1211         &attr_emulate_dpo,
1212         &attr_emulate_fua_write,
1213         &attr_emulate_fua_read,
1214         &attr_emulate_write_cache,
1215         &attr_emulate_ua_intlck_ctrl,
1216         &attr_emulate_tas,
1217         &attr_emulate_tpu,
1218         &attr_emulate_tpws,
1219         &attr_emulate_caw,
1220         &attr_emulate_3pc,
1221         &attr_emulate_pr,
1222         &attr_pi_prot_type,
1223         &attr_hw_pi_prot_type,
1224         &attr_pi_prot_format,
1225         &attr_pi_prot_verify,
1226         &attr_enforce_pr_isids,
1227         &attr_is_nonrot,
1228         &attr_emulate_rest_reord,
1229         &attr_force_pr_aptpl,
1230         &attr_hw_block_size,
1231         &attr_block_size,
1232         &attr_hw_max_sectors,
1233         &attr_optimal_sectors,
1234         &attr_hw_queue_depth,
1235         &attr_queue_depth,
1236         &attr_max_unmap_lba_count,
1237         &attr_max_unmap_block_desc_count,
1238         &attr_unmap_granularity,
1239         &attr_unmap_granularity_alignment,
1240         &attr_unmap_zeroes_data,
1241         &attr_max_write_same_len,
1242         &attr_alua_support,
1243         &attr_pgr_support,
1244         NULL,
1245 };
1246 EXPORT_SYMBOL(sbc_attrib_attrs);
1247
1248 /*
1249  * Minimal dev_attrib attributes for devices passing through CDBs.
1250  * In this case we only provide a few read-only attributes for
1251  * backwards compatibility.
1252  */
1253 struct configfs_attribute *passthrough_attrib_attrs[] = {
1254         &attr_hw_pi_prot_type,
1255         &attr_hw_block_size,
1256         &attr_hw_max_sectors,
1257         &attr_hw_queue_depth,
1258         &attr_emulate_pr,
1259         &attr_alua_support,
1260         &attr_pgr_support,
1261         NULL,
1262 };
1263 EXPORT_SYMBOL(passthrough_attrib_attrs);
1264
1265 /*
1266  * pr related dev_attrib attributes for devices passing through CDBs,
1267  * but allowing in core pr emulation.
1268  */
1269 struct configfs_attribute *passthrough_pr_attrib_attrs[] = {
1270         &attr_enforce_pr_isids,
1271         &attr_force_pr_aptpl,
1272         NULL,
1273 };
1274 EXPORT_SYMBOL(passthrough_pr_attrib_attrs);
1275
1276 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL);
1277 TB_CIT_SETUP_DRV(dev_action, NULL, NULL);
1278
1279 /* End functions for struct config_item_type tb_dev_attrib_cit */
1280
1281 /*  Start functions for struct config_item_type tb_dev_wwn_cit */
1282
1283 static struct t10_wwn *to_t10_wwn(struct config_item *item)
1284 {
1285         return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group);
1286 }
1287
1288 static ssize_t target_check_inquiry_data(char *buf)
1289 {
1290         size_t len;
1291         int i;
1292
1293         len = strlen(buf);
1294
1295         /*
1296          * SPC 4.3.1:
1297          * ASCII data fields shall contain only ASCII printable characters
1298          * (i.e., code values 20h to 7Eh) and may be terminated with one or
1299          * more ASCII null (00h) characters.
1300          */
1301         for (i = 0; i < len; i++) {
1302                 if (buf[i] < 0x20 || buf[i] > 0x7E) {
1303                         pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n");
1304                         return -EINVAL;
1305                 }
1306         }
1307
1308         return len;
1309 }
1310
1311 /*
1312  * STANDARD and VPD page 0x83 T10 Vendor Identification
1313  */
1314 static ssize_t target_wwn_vendor_id_show(struct config_item *item,
1315                 char *page)
1316 {
1317         return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]);
1318 }
1319
1320 static ssize_t target_wwn_vendor_id_store(struct config_item *item,
1321                 const char *page, size_t count)
1322 {
1323         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1324         struct se_device *dev = t10_wwn->t10_dev;
1325         /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1326         unsigned char buf[INQUIRY_VENDOR_LEN + 2];
1327         char *stripped = NULL;
1328         size_t len;
1329         ssize_t ret;
1330
1331         len = strlcpy(buf, page, sizeof(buf));
1332         if (len < sizeof(buf)) {
1333                 /* Strip any newline added from userspace. */
1334                 stripped = strstrip(buf);
1335                 len = strlen(stripped);
1336         }
1337         if (len > INQUIRY_VENDOR_LEN) {
1338                 pr_err("Emulated T10 Vendor Identification exceeds"
1339                         " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN)
1340                         "\n");
1341                 return -EOVERFLOW;
1342         }
1343
1344         ret = target_check_inquiry_data(stripped);
1345
1346         if (ret < 0)
1347                 return ret;
1348
1349         /*
1350          * Check to see if any active exports exist.  If they do exist, fail
1351          * here as changing this information on the fly (underneath the
1352          * initiator side OS dependent multipath code) could cause negative
1353          * effects.
1354          */
1355         if (dev->export_count) {
1356                 pr_err("Unable to set T10 Vendor Identification while"
1357                         " active %d exports exist\n", dev->export_count);
1358                 return -EINVAL;
1359         }
1360
1361         BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1);
1362         strlcpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor));
1363
1364         pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:"
1365                  " %s\n", dev->t10_wwn.vendor);
1366
1367         return count;
1368 }
1369
1370 static ssize_t target_wwn_product_id_show(struct config_item *item,
1371                 char *page)
1372 {
1373         return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]);
1374 }
1375
1376 static ssize_t target_wwn_product_id_store(struct config_item *item,
1377                 const char *page, size_t count)
1378 {
1379         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1380         struct se_device *dev = t10_wwn->t10_dev;
1381         /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1382         unsigned char buf[INQUIRY_MODEL_LEN + 2];
1383         char *stripped = NULL;
1384         size_t len;
1385         ssize_t ret;
1386
1387         len = strlcpy(buf, page, sizeof(buf));
1388         if (len < sizeof(buf)) {
1389                 /* Strip any newline added from userspace. */
1390                 stripped = strstrip(buf);
1391                 len = strlen(stripped);
1392         }
1393         if (len > INQUIRY_MODEL_LEN) {
1394                 pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: "
1395                          __stringify(INQUIRY_MODEL_LEN)
1396                         "\n");
1397                 return -EOVERFLOW;
1398         }
1399
1400         ret = target_check_inquiry_data(stripped);
1401
1402         if (ret < 0)
1403                 return ret;
1404
1405         /*
1406          * Check to see if any active exports exist.  If they do exist, fail
1407          * here as changing this information on the fly (underneath the
1408          * initiator side OS dependent multipath code) could cause negative
1409          * effects.
1410          */
1411         if (dev->export_count) {
1412                 pr_err("Unable to set T10 Model while active %d exports exist\n",
1413                         dev->export_count);
1414                 return -EINVAL;
1415         }
1416
1417         BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
1418         strlcpy(dev->t10_wwn.model, stripped, sizeof(dev->t10_wwn.model));
1419
1420         pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n",
1421                  dev->t10_wwn.model);
1422
1423         return count;
1424 }
1425
1426 static ssize_t target_wwn_revision_show(struct config_item *item,
1427                 char *page)
1428 {
1429         return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]);
1430 }
1431
1432 static ssize_t target_wwn_revision_store(struct config_item *item,
1433                 const char *page, size_t count)
1434 {
1435         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1436         struct se_device *dev = t10_wwn->t10_dev;
1437         /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1438         unsigned char buf[INQUIRY_REVISION_LEN + 2];
1439         char *stripped = NULL;
1440         size_t len;
1441         ssize_t ret;
1442
1443         len = strlcpy(buf, page, sizeof(buf));
1444         if (len < sizeof(buf)) {
1445                 /* Strip any newline added from userspace. */
1446                 stripped = strstrip(buf);
1447                 len = strlen(stripped);
1448         }
1449         if (len > INQUIRY_REVISION_LEN) {
1450                 pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: "
1451                          __stringify(INQUIRY_REVISION_LEN)
1452                         "\n");
1453                 return -EOVERFLOW;
1454         }
1455
1456         ret = target_check_inquiry_data(stripped);
1457
1458         if (ret < 0)
1459                 return ret;
1460
1461         /*
1462          * Check to see if any active exports exist.  If they do exist, fail
1463          * here as changing this information on the fly (underneath the
1464          * initiator side OS dependent multipath code) could cause negative
1465          * effects.
1466          */
1467         if (dev->export_count) {
1468                 pr_err("Unable to set T10 Revision while active %d exports exist\n",
1469                         dev->export_count);
1470                 return -EINVAL;
1471         }
1472
1473         BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1);
1474         strlcpy(dev->t10_wwn.revision, stripped, sizeof(dev->t10_wwn.revision));
1475
1476         pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n",
1477                  dev->t10_wwn.revision);
1478
1479         return count;
1480 }
1481
1482 static ssize_t
1483 target_wwn_company_id_show(struct config_item *item,
1484                                 char *page)
1485 {
1486         return snprintf(page, PAGE_SIZE, "%#08x\n",
1487                         to_t10_wwn(item)->company_id);
1488 }
1489
1490 static ssize_t
1491 target_wwn_company_id_store(struct config_item *item,
1492                                  const char *page, size_t count)
1493 {
1494         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1495         struct se_device *dev = t10_wwn->t10_dev;
1496         u32 val;
1497         int ret;
1498
1499         /*
1500          * The IEEE COMPANY_ID field should contain a 24-bit canonical
1501          * form OUI assigned by the IEEE.
1502          */
1503         ret = kstrtou32(page, 0, &val);
1504         if (ret < 0)
1505                 return ret;
1506
1507         if (val >= 0x1000000)
1508                 return -EOVERFLOW;
1509
1510         /*
1511          * Check to see if any active exports exist. If they do exist, fail
1512          * here as changing this information on the fly (underneath the
1513          * initiator side OS dependent multipath code) could cause negative
1514          * effects.
1515          */
1516         if (dev->export_count) {
1517                 pr_err("Unable to set Company ID while %u exports exist\n",
1518                        dev->export_count);
1519                 return -EINVAL;
1520         }
1521
1522         t10_wwn->company_id = val;
1523
1524         pr_debug("Target_Core_ConfigFS: Set IEEE Company ID: %#08x\n",
1525                  t10_wwn->company_id);
1526
1527         return count;
1528 }
1529
1530 /*
1531  * VPD page 0x80 Unit serial
1532  */
1533 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item,
1534                 char *page)
1535 {
1536         return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1537                 &to_t10_wwn(item)->unit_serial[0]);
1538 }
1539
1540 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item,
1541                 const char *page, size_t count)
1542 {
1543         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1544         struct se_device *dev = t10_wwn->t10_dev;
1545         unsigned char buf[INQUIRY_VPD_SERIAL_LEN] = { };
1546
1547         /*
1548          * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1549          * from the struct scsi_device level firmware, do not allow
1550          * VPD Unit Serial to be emulated.
1551          *
1552          * Note this struct scsi_device could also be emulating VPD
1553          * information from its drivers/scsi LLD.  But for now we assume
1554          * it is doing 'the right thing' wrt a world wide unique
1555          * VPD Unit Serial Number that OS dependent multipath can depend on.
1556          */
1557         if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
1558                 pr_err("Underlying SCSI device firmware provided VPD"
1559                         " Unit Serial, ignoring request\n");
1560                 return -EOPNOTSUPP;
1561         }
1562
1563         if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
1564                 pr_err("Emulated VPD Unit Serial exceeds"
1565                 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1566                 return -EOVERFLOW;
1567         }
1568         /*
1569          * Check to see if any active $FABRIC_MOD exports exist.  If they
1570          * do exist, fail here as changing this information on the fly
1571          * (underneath the initiator side OS dependent multipath code)
1572          * could cause negative effects.
1573          */
1574         if (dev->export_count) {
1575                 pr_err("Unable to set VPD Unit Serial while"
1576                         " active %d $FABRIC_MOD exports exist\n",
1577                         dev->export_count);
1578                 return -EINVAL;
1579         }
1580
1581         /*
1582          * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1583          *
1584          * Also, strip any newline added from the userspace
1585          * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1586          */
1587         snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
1588         snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
1589                         "%s", strstrip(buf));
1590         dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
1591
1592         pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1593                         " %s\n", dev->t10_wwn.unit_serial);
1594
1595         return count;
1596 }
1597
1598 /*
1599  * VPD page 0x83 Protocol Identifier
1600  */
1601 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item,
1602                 char *page)
1603 {
1604         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1605         struct t10_vpd *vpd;
1606         unsigned char buf[VPD_TMP_BUF_SIZE] = { };
1607         ssize_t len = 0;
1608
1609         spin_lock(&t10_wwn->t10_vpd_lock);
1610         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
1611                 if (!vpd->protocol_identifier_set)
1612                         continue;
1613
1614                 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1615
1616                 if (len + strlen(buf) >= PAGE_SIZE)
1617                         break;
1618
1619                 len += sprintf(page+len, "%s", buf);
1620         }
1621         spin_unlock(&t10_wwn->t10_vpd_lock);
1622
1623         return len;
1624 }
1625
1626 /*
1627  * Generic wrapper for dumping VPD identifiers by association.
1628  */
1629 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc)                           \
1630 static ssize_t target_wwn_##_name##_show(struct config_item *item,      \
1631                 char *page)                                             \
1632 {                                                                       \
1633         struct t10_wwn *t10_wwn = to_t10_wwn(item);                     \
1634         struct t10_vpd *vpd;                                            \
1635         unsigned char buf[VPD_TMP_BUF_SIZE];                            \
1636         ssize_t len = 0;                                                \
1637                                                                         \
1638         spin_lock(&t10_wwn->t10_vpd_lock);                              \
1639         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {    \
1640                 if (vpd->association != _assoc)                         \
1641                         continue;                                       \
1642                                                                         \
1643                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
1644                 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE);   \
1645                 if (len + strlen(buf) >= PAGE_SIZE)                     \
1646                         break;                                          \
1647                 len += sprintf(page+len, "%s", buf);                    \
1648                                                                         \
1649                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
1650                 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1651                 if (len + strlen(buf) >= PAGE_SIZE)                     \
1652                         break;                                          \
1653                 len += sprintf(page+len, "%s", buf);                    \
1654                                                                         \
1655                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
1656                 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1657                 if (len + strlen(buf) >= PAGE_SIZE)                     \
1658                         break;                                          \
1659                 len += sprintf(page+len, "%s", buf);                    \
1660         }                                                               \
1661         spin_unlock(&t10_wwn->t10_vpd_lock);                            \
1662                                                                         \
1663         return len;                                                     \
1664 }
1665
1666 /* VPD page 0x83 Association: Logical Unit */
1667 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1668 /* VPD page 0x83 Association: Target Port */
1669 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1670 /* VPD page 0x83 Association: SCSI Target Device */
1671 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1672
1673 CONFIGFS_ATTR(target_wwn_, vendor_id);
1674 CONFIGFS_ATTR(target_wwn_, product_id);
1675 CONFIGFS_ATTR(target_wwn_, revision);
1676 CONFIGFS_ATTR(target_wwn_, company_id);
1677 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial);
1678 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier);
1679 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit);
1680 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port);
1681 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device);
1682
1683 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1684         &target_wwn_attr_vendor_id,
1685         &target_wwn_attr_product_id,
1686         &target_wwn_attr_revision,
1687         &target_wwn_attr_company_id,
1688         &target_wwn_attr_vpd_unit_serial,
1689         &target_wwn_attr_vpd_protocol_identifier,
1690         &target_wwn_attr_vpd_assoc_logical_unit,
1691         &target_wwn_attr_vpd_assoc_target_port,
1692         &target_wwn_attr_vpd_assoc_scsi_target_device,
1693         NULL,
1694 };
1695
1696 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs);
1697
1698 /*  End functions for struct config_item_type tb_dev_wwn_cit */
1699
1700 /*  Start functions for struct config_item_type tb_dev_pr_cit */
1701
1702 static struct se_device *pr_to_dev(struct config_item *item)
1703 {
1704         return container_of(to_config_group(item), struct se_device,
1705                         dev_pr_group);
1706 }
1707
1708 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1709                 char *page)
1710 {
1711         struct se_node_acl *se_nacl;
1712         struct t10_pr_registration *pr_reg;
1713         char i_buf[PR_REG_ISID_ID_LEN] = { };
1714
1715         pr_reg = dev->dev_pr_res_holder;
1716         if (!pr_reg)
1717                 return sprintf(page, "No SPC-3 Reservation holder\n");
1718
1719         se_nacl = pr_reg->pr_reg_nacl;
1720         core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1721
1722         return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1723                 se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1724                 se_nacl->initiatorname, i_buf);
1725 }
1726
1727 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1728                 char *page)
1729 {
1730         struct se_session *sess = dev->reservation_holder;
1731         struct se_node_acl *se_nacl;
1732         ssize_t len;
1733
1734         if (sess) {
1735                 se_nacl = sess->se_node_acl;
1736                 len = sprintf(page,
1737                               "SPC-2 Reservation: %s Initiator: %s\n",
1738                               se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1739                               se_nacl->initiatorname);
1740         } else {
1741                 len = sprintf(page, "No SPC-2 Reservation holder\n");
1742         }
1743         return len;
1744 }
1745
1746 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page)
1747 {
1748         struct se_device *dev = pr_to_dev(item);
1749         int ret;
1750
1751         if (!dev->dev_attrib.emulate_pr)
1752                 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1753
1754         if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1755                 return sprintf(page, "Passthrough\n");
1756
1757         spin_lock(&dev->dev_reservation_lock);
1758         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1759                 ret = target_core_dev_pr_show_spc2_res(dev, page);
1760         else
1761                 ret = target_core_dev_pr_show_spc3_res(dev, page);
1762         spin_unlock(&dev->dev_reservation_lock);
1763         return ret;
1764 }
1765
1766 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item,
1767                 char *page)
1768 {
1769         struct se_device *dev = pr_to_dev(item);
1770         ssize_t len = 0;
1771
1772         spin_lock(&dev->dev_reservation_lock);
1773         if (!dev->dev_pr_res_holder) {
1774                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1775         } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1776                 len = sprintf(page, "SPC-3 Reservation: All Target"
1777                         " Ports registration\n");
1778         } else {
1779                 len = sprintf(page, "SPC-3 Reservation: Single"
1780                         " Target Port registration\n");
1781         }
1782
1783         spin_unlock(&dev->dev_reservation_lock);
1784         return len;
1785 }
1786
1787 static ssize_t target_pr_res_pr_generation_show(struct config_item *item,
1788                 char *page)
1789 {
1790         return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation);
1791 }
1792
1793
1794 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item,
1795                 char *page)
1796 {
1797         struct se_device *dev = pr_to_dev(item);
1798         struct se_node_acl *se_nacl;
1799         struct se_portal_group *se_tpg;
1800         struct t10_pr_registration *pr_reg;
1801         const struct target_core_fabric_ops *tfo;
1802         ssize_t len = 0;
1803
1804         spin_lock(&dev->dev_reservation_lock);
1805         pr_reg = dev->dev_pr_res_holder;
1806         if (!pr_reg) {
1807                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1808                 goto out_unlock;
1809         }
1810
1811         se_nacl = pr_reg->pr_reg_nacl;
1812         se_tpg = se_nacl->se_tpg;
1813         tfo = se_tpg->se_tpg_tfo;
1814
1815         len += sprintf(page+len, "SPC-3 Reservation: %s"
1816                 " Target Node Endpoint: %s\n", tfo->fabric_name,
1817                 tfo->tpg_get_wwn(se_tpg));
1818         len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1819                 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1820                 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
1821                 tfo->fabric_name, tfo->tpg_get_tag(se_tpg),
1822                 tfo->fabric_name, pr_reg->pr_aptpl_target_lun);
1823
1824 out_unlock:
1825         spin_unlock(&dev->dev_reservation_lock);
1826         return len;
1827 }
1828
1829
1830 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item,
1831                 char *page)
1832 {
1833         struct se_device *dev = pr_to_dev(item);
1834         const struct target_core_fabric_ops *tfo;
1835         struct t10_pr_registration *pr_reg;
1836         unsigned char buf[384];
1837         char i_buf[PR_REG_ISID_ID_LEN];
1838         ssize_t len = 0;
1839         int reg_count = 0;
1840
1841         len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1842
1843         spin_lock(&dev->t10_pr.registration_lock);
1844         list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1845                         pr_reg_list) {
1846
1847                 memset(buf, 0, 384);
1848                 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1849                 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1850                 core_pr_dump_initiator_port(pr_reg, i_buf,
1851                                         PR_REG_ISID_ID_LEN);
1852                 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1853                         tfo->fabric_name,
1854                         pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1855                         pr_reg->pr_res_generation);
1856
1857                 if (len + strlen(buf) >= PAGE_SIZE)
1858                         break;
1859
1860                 len += sprintf(page+len, "%s", buf);
1861                 reg_count++;
1862         }
1863         spin_unlock(&dev->t10_pr.registration_lock);
1864
1865         if (!reg_count)
1866                 len += sprintf(page+len, "None\n");
1867
1868         return len;
1869 }
1870
1871 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page)
1872 {
1873         struct se_device *dev = pr_to_dev(item);
1874         struct t10_pr_registration *pr_reg;
1875         ssize_t len = 0;
1876
1877         spin_lock(&dev->dev_reservation_lock);
1878         pr_reg = dev->dev_pr_res_holder;
1879         if (pr_reg) {
1880                 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1881                         core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1882         } else {
1883                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1884         }
1885
1886         spin_unlock(&dev->dev_reservation_lock);
1887         return len;
1888 }
1889
1890 static ssize_t target_pr_res_type_show(struct config_item *item, char *page)
1891 {
1892         struct se_device *dev = pr_to_dev(item);
1893
1894         if (!dev->dev_attrib.emulate_pr)
1895                 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1896         if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1897                 return sprintf(page, "SPC_PASSTHROUGH\n");
1898         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1899                 return sprintf(page, "SPC2_RESERVATIONS\n");
1900
1901         return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1902 }
1903
1904 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item,
1905                 char *page)
1906 {
1907         struct se_device *dev = pr_to_dev(item);
1908
1909         if (!dev->dev_attrib.emulate_pr ||
1910             (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1911                 return 0;
1912
1913         return sprintf(page, "APTPL Bit Status: %s\n",
1914                 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1915 }
1916
1917 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item,
1918                 char *page)
1919 {
1920         struct se_device *dev = pr_to_dev(item);
1921
1922         if (!dev->dev_attrib.emulate_pr ||
1923             (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1924                 return 0;
1925
1926         return sprintf(page, "Ready to process PR APTPL metadata..\n");
1927 }
1928
1929 enum {
1930         Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1931         Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1932         Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1933         Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1934 };
1935
1936 static match_table_t tokens = {
1937         {Opt_initiator_fabric, "initiator_fabric=%s"},
1938         {Opt_initiator_node, "initiator_node=%s"},
1939         {Opt_initiator_sid, "initiator_sid=%s"},
1940         {Opt_sa_res_key, "sa_res_key=%s"},
1941         {Opt_res_holder, "res_holder=%d"},
1942         {Opt_res_type, "res_type=%d"},
1943         {Opt_res_scope, "res_scope=%d"},
1944         {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1945         {Opt_mapped_lun, "mapped_lun=%u"},
1946         {Opt_target_fabric, "target_fabric=%s"},
1947         {Opt_target_node, "target_node=%s"},
1948         {Opt_tpgt, "tpgt=%d"},
1949         {Opt_port_rtpi, "port_rtpi=%d"},
1950         {Opt_target_lun, "target_lun=%u"},
1951         {Opt_err, NULL}
1952 };
1953
1954 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item,
1955                 const char *page, size_t count)
1956 {
1957         struct se_device *dev = pr_to_dev(item);
1958         unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1959         unsigned char *t_fabric = NULL, *t_port = NULL;
1960         char *orig, *ptr, *opts;
1961         substring_t args[MAX_OPT_ARGS];
1962         unsigned long long tmp_ll;
1963         u64 sa_res_key = 0;
1964         u64 mapped_lun = 0, target_lun = 0;
1965         int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1966         u16 tpgt = 0;
1967         u8 type = 0;
1968
1969         if (!dev->dev_attrib.emulate_pr ||
1970             (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1971                 return count;
1972         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1973                 return count;
1974
1975         if (dev->export_count) {
1976                 pr_debug("Unable to process APTPL metadata while"
1977                         " active fabric exports exist\n");
1978                 return -EINVAL;
1979         }
1980
1981         opts = kstrdup(page, GFP_KERNEL);
1982         if (!opts)
1983                 return -ENOMEM;
1984
1985         orig = opts;
1986         while ((ptr = strsep(&opts, ",\n")) != NULL) {
1987                 if (!*ptr)
1988                         continue;
1989
1990                 token = match_token(ptr, tokens, args);
1991                 switch (token) {
1992                 case Opt_initiator_fabric:
1993                         i_fabric = match_strdup(args);
1994                         if (!i_fabric) {
1995                                 ret = -ENOMEM;
1996                                 goto out;
1997                         }
1998                         break;
1999                 case Opt_initiator_node:
2000                         i_port = match_strdup(args);
2001                         if (!i_port) {
2002                                 ret = -ENOMEM;
2003                                 goto out;
2004                         }
2005                         if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
2006                                 pr_err("APTPL metadata initiator_node="
2007                                         " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
2008                                         PR_APTPL_MAX_IPORT_LEN);
2009                                 ret = -EINVAL;
2010                                 break;
2011                         }
2012                         break;
2013                 case Opt_initiator_sid:
2014                         isid = match_strdup(args);
2015                         if (!isid) {
2016                                 ret = -ENOMEM;
2017                                 goto out;
2018                         }
2019                         if (strlen(isid) >= PR_REG_ISID_LEN) {
2020                                 pr_err("APTPL metadata initiator_isid"
2021                                         "= exceeds PR_REG_ISID_LEN: %d\n",
2022                                         PR_REG_ISID_LEN);
2023                                 ret = -EINVAL;
2024                                 break;
2025                         }
2026                         break;
2027                 case Opt_sa_res_key:
2028                         ret = match_u64(args,  &tmp_ll);
2029                         if (ret < 0) {
2030                                 pr_err("kstrtoull() failed for sa_res_key=\n");
2031                                 goto out;
2032                         }
2033                         sa_res_key = (u64)tmp_ll;
2034                         break;
2035                 /*
2036                  * PR APTPL Metadata for Reservation
2037                  */
2038                 case Opt_res_holder:
2039                         ret = match_int(args, &arg);
2040                         if (ret)
2041                                 goto out;
2042                         res_holder = arg;
2043                         break;
2044                 case Opt_res_type:
2045                         ret = match_int(args, &arg);
2046                         if (ret)
2047                                 goto out;
2048                         type = (u8)arg;
2049                         break;
2050                 case Opt_res_scope:
2051                         ret = match_int(args, &arg);
2052                         if (ret)
2053                                 goto out;
2054                         break;
2055                 case Opt_res_all_tg_pt:
2056                         ret = match_int(args, &arg);
2057                         if (ret)
2058                                 goto out;
2059                         all_tg_pt = (int)arg;
2060                         break;
2061                 case Opt_mapped_lun:
2062                         ret = match_u64(args, &tmp_ll);
2063                         if (ret)
2064                                 goto out;
2065                         mapped_lun = (u64)tmp_ll;
2066                         break;
2067                 /*
2068                  * PR APTPL Metadata for Target Port
2069                  */
2070                 case Opt_target_fabric:
2071                         t_fabric = match_strdup(args);
2072                         if (!t_fabric) {
2073                                 ret = -ENOMEM;
2074                                 goto out;
2075                         }
2076                         break;
2077                 case Opt_target_node:
2078                         t_port = match_strdup(args);
2079                         if (!t_port) {
2080                                 ret = -ENOMEM;
2081                                 goto out;
2082                         }
2083                         if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
2084                                 pr_err("APTPL metadata target_node="
2085                                         " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
2086                                         PR_APTPL_MAX_TPORT_LEN);
2087                                 ret = -EINVAL;
2088                                 break;
2089                         }
2090                         break;
2091                 case Opt_tpgt:
2092                         ret = match_int(args, &arg);
2093                         if (ret)
2094                                 goto out;
2095                         tpgt = (u16)arg;
2096                         break;
2097                 case Opt_port_rtpi:
2098                         ret = match_int(args, &arg);
2099                         if (ret)
2100                                 goto out;
2101                         break;
2102                 case Opt_target_lun:
2103                         ret = match_u64(args, &tmp_ll);
2104                         if (ret)
2105                                 goto out;
2106                         target_lun = (u64)tmp_ll;
2107                         break;
2108                 default:
2109                         break;
2110                 }
2111         }
2112
2113         if (!i_port || !t_port || !sa_res_key) {
2114                 pr_err("Illegal parameters for APTPL registration\n");
2115                 ret = -EINVAL;
2116                 goto out;
2117         }
2118
2119         if (res_holder && !(type)) {
2120                 pr_err("Illegal PR type: 0x%02x for reservation"
2121                                 " holder\n", type);
2122                 ret = -EINVAL;
2123                 goto out;
2124         }
2125
2126         ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
2127                         i_port, isid, mapped_lun, t_port, tpgt, target_lun,
2128                         res_holder, all_tg_pt, type);
2129 out:
2130         kfree(i_fabric);
2131         kfree(i_port);
2132         kfree(isid);
2133         kfree(t_fabric);
2134         kfree(t_port);
2135         kfree(orig);
2136         return (ret == 0) ? count : ret;
2137 }
2138
2139
2140 CONFIGFS_ATTR_RO(target_pr_, res_holder);
2141 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts);
2142 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation);
2143 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port);
2144 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts);
2145 CONFIGFS_ATTR_RO(target_pr_, res_pr_type);
2146 CONFIGFS_ATTR_RO(target_pr_, res_type);
2147 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active);
2148 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata);
2149
2150 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
2151         &target_pr_attr_res_holder,
2152         &target_pr_attr_res_pr_all_tgt_pts,
2153         &target_pr_attr_res_pr_generation,
2154         &target_pr_attr_res_pr_holder_tg_port,
2155         &target_pr_attr_res_pr_registered_i_pts,
2156         &target_pr_attr_res_pr_type,
2157         &target_pr_attr_res_type,
2158         &target_pr_attr_res_aptpl_active,
2159         &target_pr_attr_res_aptpl_metadata,
2160         NULL,
2161 };
2162
2163 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs);
2164
2165 /*  End functions for struct config_item_type tb_dev_pr_cit */
2166
2167 /*  Start functions for struct config_item_type tb_dev_cit */
2168
2169 static inline struct se_device *to_device(struct config_item *item)
2170 {
2171         return container_of(to_config_group(item), struct se_device, dev_group);
2172 }
2173
2174 static ssize_t target_dev_info_show(struct config_item *item, char *page)
2175 {
2176         struct se_device *dev = to_device(item);
2177         int bl = 0;
2178         ssize_t read_bytes = 0;
2179
2180         transport_dump_dev_state(dev, page, &bl);
2181         read_bytes += bl;
2182         read_bytes += dev->transport->show_configfs_dev_params(dev,
2183                         page+read_bytes);
2184         return read_bytes;
2185 }
2186
2187 static ssize_t target_dev_control_store(struct config_item *item,
2188                 const char *page, size_t count)
2189 {
2190         struct se_device *dev = to_device(item);
2191
2192         return dev->transport->set_configfs_dev_params(dev, page, count);
2193 }
2194
2195 static ssize_t target_dev_alias_show(struct config_item *item, char *page)
2196 {
2197         struct se_device *dev = to_device(item);
2198
2199         if (!(dev->dev_flags & DF_USING_ALIAS))
2200                 return 0;
2201
2202         return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
2203 }
2204
2205 static ssize_t target_dev_alias_store(struct config_item *item,
2206                 const char *page, size_t count)
2207 {
2208         struct se_device *dev = to_device(item);
2209         struct se_hba *hba = dev->se_hba;
2210         ssize_t read_bytes;
2211
2212         if (count > (SE_DEV_ALIAS_LEN-1)) {
2213                 pr_err("alias count: %d exceeds"
2214                         " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
2215                         SE_DEV_ALIAS_LEN-1);
2216                 return -EINVAL;
2217         }
2218
2219         read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
2220         if (!read_bytes)
2221                 return -EINVAL;
2222         if (dev->dev_alias[read_bytes - 1] == '\n')
2223                 dev->dev_alias[read_bytes - 1] = '\0';
2224
2225         dev->dev_flags |= DF_USING_ALIAS;
2226
2227         pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
2228                 config_item_name(&hba->hba_group.cg_item),
2229                 config_item_name(&dev->dev_group.cg_item),
2230                 dev->dev_alias);
2231
2232         return read_bytes;
2233 }
2234
2235 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page)
2236 {
2237         struct se_device *dev = to_device(item);
2238
2239         if (!(dev->dev_flags & DF_USING_UDEV_PATH))
2240                 return 0;
2241
2242         return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
2243 }
2244
2245 static ssize_t target_dev_udev_path_store(struct config_item *item,
2246                 const char *page, size_t count)
2247 {
2248         struct se_device *dev = to_device(item);
2249         struct se_hba *hba = dev->se_hba;
2250         ssize_t read_bytes;
2251
2252         if (count > (SE_UDEV_PATH_LEN-1)) {
2253                 pr_err("udev_path count: %d exceeds"
2254                         " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
2255                         SE_UDEV_PATH_LEN-1);
2256                 return -EINVAL;
2257         }
2258
2259         read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
2260                         "%s", page);
2261         if (!read_bytes)
2262                 return -EINVAL;
2263         if (dev->udev_path[read_bytes - 1] == '\n')
2264                 dev->udev_path[read_bytes - 1] = '\0';
2265
2266         dev->dev_flags |= DF_USING_UDEV_PATH;
2267
2268         pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
2269                 config_item_name(&hba->hba_group.cg_item),
2270                 config_item_name(&dev->dev_group.cg_item),
2271                 dev->udev_path);
2272
2273         return read_bytes;
2274 }
2275
2276 static ssize_t target_dev_enable_show(struct config_item *item, char *page)
2277 {
2278         struct se_device *dev = to_device(item);
2279
2280         return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev));
2281 }
2282
2283 static ssize_t target_dev_enable_store(struct config_item *item,
2284                 const char *page, size_t count)
2285 {
2286         struct se_device *dev = to_device(item);
2287         char *ptr;
2288         int ret;
2289
2290         ptr = strstr(page, "1");
2291         if (!ptr) {
2292                 pr_err("For dev_enable ops, only valid value"
2293                                 " is \"1\"\n");
2294                 return -EINVAL;
2295         }
2296
2297         ret = target_configure_device(dev);
2298         if (ret)
2299                 return ret;
2300         return count;
2301 }
2302
2303 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page)
2304 {
2305         struct se_device *dev = to_device(item);
2306         struct config_item *lu_ci;
2307         struct t10_alua_lu_gp *lu_gp;
2308         struct t10_alua_lu_gp_member *lu_gp_mem;
2309         ssize_t len = 0;
2310
2311         lu_gp_mem = dev->dev_alua_lu_gp_mem;
2312         if (!lu_gp_mem)
2313                 return 0;
2314
2315         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2316         lu_gp = lu_gp_mem->lu_gp;
2317         if (lu_gp) {
2318                 lu_ci = &lu_gp->lu_gp_group.cg_item;
2319                 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
2320                         config_item_name(lu_ci), lu_gp->lu_gp_id);
2321         }
2322         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2323
2324         return len;
2325 }
2326
2327 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item,
2328                 const char *page, size_t count)
2329 {
2330         struct se_device *dev = to_device(item);
2331         struct se_hba *hba = dev->se_hba;
2332         struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
2333         struct t10_alua_lu_gp_member *lu_gp_mem;
2334         unsigned char buf[LU_GROUP_NAME_BUF] = { };
2335         int move = 0;
2336
2337         lu_gp_mem = dev->dev_alua_lu_gp_mem;
2338         if (!lu_gp_mem)
2339                 return count;
2340
2341         if (count > LU_GROUP_NAME_BUF) {
2342                 pr_err("ALUA LU Group Alias too large!\n");
2343                 return -EINVAL;
2344         }
2345         memcpy(buf, page, count);
2346         /*
2347          * Any ALUA logical unit alias besides "NULL" means we will be
2348          * making a new group association.
2349          */
2350         if (strcmp(strstrip(buf), "NULL")) {
2351                 /*
2352                  * core_alua_get_lu_gp_by_name() will increment reference to
2353                  * struct t10_alua_lu_gp.  This reference is released with
2354                  * core_alua_get_lu_gp_by_name below().
2355                  */
2356                 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
2357                 if (!lu_gp_new)
2358                         return -ENODEV;
2359         }
2360
2361         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2362         lu_gp = lu_gp_mem->lu_gp;
2363         if (lu_gp) {
2364                 /*
2365                  * Clearing an existing lu_gp association, and replacing
2366                  * with NULL
2367                  */
2368                 if (!lu_gp_new) {
2369                         pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
2370                                 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
2371                                 " %hu\n",
2372                                 config_item_name(&hba->hba_group.cg_item),
2373                                 config_item_name(&dev->dev_group.cg_item),
2374                                 config_item_name(&lu_gp->lu_gp_group.cg_item),
2375                                 lu_gp->lu_gp_id);
2376
2377                         __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2378                         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2379
2380                         return count;
2381                 }
2382                 /*
2383                  * Removing existing association of lu_gp_mem with lu_gp
2384                  */
2385                 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2386                 move = 1;
2387         }
2388         /*
2389          * Associate lu_gp_mem with lu_gp_new.
2390          */
2391         __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
2392         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2393
2394         pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
2395                 " core/alua/lu_gps/%s, ID: %hu\n",
2396                 (move) ? "Moving" : "Adding",
2397                 config_item_name(&hba->hba_group.cg_item),
2398                 config_item_name(&dev->dev_group.cg_item),
2399                 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
2400                 lu_gp_new->lu_gp_id);
2401
2402         core_alua_put_lu_gp_from_name(lu_gp_new);
2403         return count;
2404 }
2405
2406 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page)
2407 {
2408         struct se_device *dev = to_device(item);
2409         struct t10_alua_lba_map *map;
2410         struct t10_alua_lba_map_member *mem;
2411         char *b = page;
2412         int bl = 0;
2413         char state;
2414
2415         spin_lock(&dev->t10_alua.lba_map_lock);
2416         if (!list_empty(&dev->t10_alua.lba_map_list))
2417             bl += sprintf(b + bl, "%u %u\n",
2418                           dev->t10_alua.lba_map_segment_size,
2419                           dev->t10_alua.lba_map_segment_multiplier);
2420         list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
2421                 bl += sprintf(b + bl, "%llu %llu",
2422                               map->lba_map_first_lba, map->lba_map_last_lba);
2423                 list_for_each_entry(mem, &map->lba_map_mem_list,
2424                                     lba_map_mem_list) {
2425                         switch (mem->lba_map_mem_alua_state) {
2426                         case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
2427                                 state = 'O';
2428                                 break;
2429                         case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
2430                                 state = 'A';
2431                                 break;
2432                         case ALUA_ACCESS_STATE_STANDBY:
2433                                 state = 'S';
2434                                 break;
2435                         case ALUA_ACCESS_STATE_UNAVAILABLE:
2436                                 state = 'U';
2437                                 break;
2438                         default:
2439                                 state = '.';
2440                                 break;
2441                         }
2442                         bl += sprintf(b + bl, " %d:%c",
2443                                       mem->lba_map_mem_alua_pg_id, state);
2444                 }
2445                 bl += sprintf(b + bl, "\n");
2446         }
2447         spin_unlock(&dev->t10_alua.lba_map_lock);
2448         return bl;
2449 }
2450
2451 static ssize_t target_dev_lba_map_store(struct config_item *item,
2452                 const char *page, size_t count)
2453 {
2454         struct se_device *dev = to_device(item);
2455         struct t10_alua_lba_map *lba_map = NULL;
2456         struct list_head lba_list;
2457         char *map_entries, *orig, *ptr;
2458         char state;
2459         int pg_num = -1, pg;
2460         int ret = 0, num = 0, pg_id, alua_state;
2461         unsigned long start_lba = -1, end_lba = -1;
2462         unsigned long segment_size = -1, segment_mult = -1;
2463
2464         orig = map_entries = kstrdup(page, GFP_KERNEL);
2465         if (!map_entries)
2466                 return -ENOMEM;
2467
2468         INIT_LIST_HEAD(&lba_list);
2469         while ((ptr = strsep(&map_entries, "\n")) != NULL) {
2470                 if (!*ptr)
2471                         continue;
2472
2473                 if (num == 0) {
2474                         if (sscanf(ptr, "%lu %lu\n",
2475                                    &segment_size, &segment_mult) != 2) {
2476                                 pr_err("Invalid line %d\n", num);
2477                                 ret = -EINVAL;
2478                                 break;
2479                         }
2480                         num++;
2481                         continue;
2482                 }
2483                 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2484                         pr_err("Invalid line %d\n", num);
2485                         ret = -EINVAL;
2486                         break;
2487                 }
2488                 ptr = strchr(ptr, ' ');
2489                 if (!ptr) {
2490                         pr_err("Invalid line %d, missing end lba\n", num);
2491                         ret = -EINVAL;
2492                         break;
2493                 }
2494                 ptr++;
2495                 ptr = strchr(ptr, ' ');
2496                 if (!ptr) {
2497                         pr_err("Invalid line %d, missing state definitions\n",
2498                                num);
2499                         ret = -EINVAL;
2500                         break;
2501                 }
2502                 ptr++;
2503                 lba_map = core_alua_allocate_lba_map(&lba_list,
2504                                                      start_lba, end_lba);
2505                 if (IS_ERR(lba_map)) {
2506                         ret = PTR_ERR(lba_map);
2507                         break;
2508                 }
2509                 pg = 0;
2510                 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2511                         switch (state) {
2512                         case 'O':
2513                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2514                                 break;
2515                         case 'A':
2516                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2517                                 break;
2518                         case 'S':
2519                                 alua_state = ALUA_ACCESS_STATE_STANDBY;
2520                                 break;
2521                         case 'U':
2522                                 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2523                                 break;
2524                         default:
2525                                 pr_err("Invalid ALUA state '%c'\n", state);
2526                                 ret = -EINVAL;
2527                                 goto out;
2528                         }
2529
2530                         ret = core_alua_allocate_lba_map_mem(lba_map,
2531                                                              pg_id, alua_state);
2532                         if (ret) {
2533                                 pr_err("Invalid target descriptor %d:%c "
2534                                        "at line %d\n",
2535                                        pg_id, state, num);
2536                                 break;
2537                         }
2538                         pg++;
2539                         ptr = strchr(ptr, ' ');
2540                         if (ptr)
2541                                 ptr++;
2542                         else
2543                                 break;
2544                 }
2545                 if (pg_num == -1)
2546                     pg_num = pg;
2547                 else if (pg != pg_num) {
2548                         pr_err("Only %d from %d port groups definitions "
2549                                "at line %d\n", pg, pg_num, num);
2550                         ret = -EINVAL;
2551                         break;
2552                 }
2553                 num++;
2554         }
2555 out:
2556         if (ret) {
2557                 core_alua_free_lba_map(&lba_list);
2558                 count = ret;
2559         } else
2560                 core_alua_set_lba_map(dev, &lba_list,
2561                                       segment_size, segment_mult);
2562         kfree(orig);
2563         return count;
2564 }
2565
2566 CONFIGFS_ATTR_RO(target_dev_, info);
2567 CONFIGFS_ATTR_WO(target_dev_, control);
2568 CONFIGFS_ATTR(target_dev_, alias);
2569 CONFIGFS_ATTR(target_dev_, udev_path);
2570 CONFIGFS_ATTR(target_dev_, enable);
2571 CONFIGFS_ATTR(target_dev_, alua_lu_gp);
2572 CONFIGFS_ATTR(target_dev_, lba_map);
2573
2574 static struct configfs_attribute *target_core_dev_attrs[] = {
2575         &target_dev_attr_info,
2576         &target_dev_attr_control,
2577         &target_dev_attr_alias,
2578         &target_dev_attr_udev_path,
2579         &target_dev_attr_enable,
2580         &target_dev_attr_alua_lu_gp,
2581         &target_dev_attr_lba_map,
2582         NULL,
2583 };
2584
2585 static void target_core_dev_release(struct config_item *item)
2586 {
2587         struct config_group *dev_cg = to_config_group(item);
2588         struct se_device *dev =
2589                 container_of(dev_cg, struct se_device, dev_group);
2590
2591         target_free_device(dev);
2592 }
2593
2594 /*
2595  * Used in target_core_fabric_configfs.c to verify valid se_device symlink
2596  * within target_fabric_port_link()
2597  */
2598 struct configfs_item_operations target_core_dev_item_ops = {
2599         .release                = target_core_dev_release,
2600 };
2601
2602 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2603
2604 /* End functions for struct config_item_type tb_dev_cit */
2605
2606 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2607
2608 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item)
2609 {
2610         return container_of(to_config_group(item), struct t10_alua_lu_gp,
2611                         lu_gp_group);
2612 }
2613
2614 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page)
2615 {
2616         struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2617
2618         if (!lu_gp->lu_gp_valid_id)
2619                 return 0;
2620         return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2621 }
2622
2623 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item,
2624                 const char *page, size_t count)
2625 {
2626         struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2627         struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2628         unsigned long lu_gp_id;
2629         int ret;
2630
2631         ret = kstrtoul(page, 0, &lu_gp_id);
2632         if (ret < 0) {
2633                 pr_err("kstrtoul() returned %d for"
2634                         " lu_gp_id\n", ret);
2635                 return ret;
2636         }
2637         if (lu_gp_id > 0x0000ffff) {
2638                 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2639                         " 0x0000ffff\n", lu_gp_id);
2640                 return -EINVAL;
2641         }
2642
2643         ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2644         if (ret < 0)
2645                 return -EINVAL;
2646
2647         pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2648                 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2649                 config_item_name(&alua_lu_gp_cg->cg_item),
2650                 lu_gp->lu_gp_id);
2651
2652         return count;
2653 }
2654
2655 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
2656 {
2657         struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2658         struct se_device *dev;
2659         struct se_hba *hba;
2660         struct t10_alua_lu_gp_member *lu_gp_mem;
2661         ssize_t len = 0, cur_len;
2662         unsigned char buf[LU_GROUP_NAME_BUF] = { };
2663
2664         spin_lock(&lu_gp->lu_gp_lock);
2665         list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2666                 dev = lu_gp_mem->lu_gp_mem_dev;
2667                 hba = dev->se_hba;
2668
2669                 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2670                         config_item_name(&hba->hba_group.cg_item),
2671                         config_item_name(&dev->dev_group.cg_item));
2672                 cur_len++; /* Extra byte for NULL terminator */
2673
2674                 if ((cur_len + len) > PAGE_SIZE) {
2675                         pr_warn("Ran out of lu_gp_show_attr"
2676                                 "_members buffer\n");
2677                         break;
2678                 }
2679                 memcpy(page+len, buf, cur_len);
2680                 len += cur_len;
2681         }
2682         spin_unlock(&lu_gp->lu_gp_lock);
2683
2684         return len;
2685 }
2686
2687 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id);
2688 CONFIGFS_ATTR_RO(target_lu_gp_, members);
2689
2690 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2691         &target_lu_gp_attr_lu_gp_id,
2692         &target_lu_gp_attr_members,
2693         NULL,
2694 };
2695
2696 static void target_core_alua_lu_gp_release(struct config_item *item)
2697 {
2698         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2699                         struct t10_alua_lu_gp, lu_gp_group);
2700
2701         core_alua_free_lu_gp(lu_gp);
2702 }
2703
2704 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2705         .release                = target_core_alua_lu_gp_release,
2706 };
2707
2708 static const struct config_item_type target_core_alua_lu_gp_cit = {
2709         .ct_item_ops            = &target_core_alua_lu_gp_ops,
2710         .ct_attrs               = target_core_alua_lu_gp_attrs,
2711         .ct_owner               = THIS_MODULE,
2712 };
2713
2714 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2715
2716 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2717
2718 static struct config_group *target_core_alua_create_lu_gp(
2719         struct config_group *group,
2720         const char *name)
2721 {
2722         struct t10_alua_lu_gp *lu_gp;
2723         struct config_group *alua_lu_gp_cg = NULL;
2724         struct config_item *alua_lu_gp_ci = NULL;
2725
2726         lu_gp = core_alua_allocate_lu_gp(name, 0);
2727         if (IS_ERR(lu_gp))
2728                 return NULL;
2729
2730         alua_lu_gp_cg = &lu_gp->lu_gp_group;
2731         alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2732
2733         config_group_init_type_name(alua_lu_gp_cg, name,
2734                         &target_core_alua_lu_gp_cit);
2735
2736         pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2737                 " Group: core/alua/lu_gps/%s\n",
2738                 config_item_name(alua_lu_gp_ci));
2739
2740         return alua_lu_gp_cg;
2741
2742 }
2743
2744 static void target_core_alua_drop_lu_gp(
2745         struct config_group *group,
2746         struct config_item *item)
2747 {
2748         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2749                         struct t10_alua_lu_gp, lu_gp_group);
2750
2751         pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2752                 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2753                 config_item_name(item), lu_gp->lu_gp_id);
2754         /*
2755          * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2756          * -> target_core_alua_lu_gp_release()
2757          */
2758         config_item_put(item);
2759 }
2760
2761 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2762         .make_group             = &target_core_alua_create_lu_gp,
2763         .drop_item              = &target_core_alua_drop_lu_gp,
2764 };
2765
2766 static const struct config_item_type target_core_alua_lu_gps_cit = {
2767         .ct_item_ops            = NULL,
2768         .ct_group_ops           = &target_core_alua_lu_gps_group_ops,
2769         .ct_owner               = THIS_MODULE,
2770 };
2771
2772 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2773
2774 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2775
2776 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item)
2777 {
2778         return container_of(to_config_group(item), struct t10_alua_tg_pt_gp,
2779                         tg_pt_gp_group);
2780 }
2781
2782 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item,
2783                 char *page)
2784 {
2785         return sprintf(page, "%d\n",
2786                        to_tg_pt_gp(item)->tg_pt_gp_alua_access_state);
2787 }
2788
2789 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item,
2790                 const char *page, size_t count)
2791 {
2792         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2793         struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2794         unsigned long tmp;
2795         int new_state, ret;
2796
2797         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2798                 pr_err("Unable to do implicit ALUA on invalid tg_pt_gp ID\n");
2799                 return -EINVAL;
2800         }
2801         if (!target_dev_configured(dev)) {
2802                 pr_err("Unable to set alua_access_state while device is"
2803                        " not configured\n");
2804                 return -ENODEV;
2805         }
2806
2807         ret = kstrtoul(page, 0, &tmp);
2808         if (ret < 0) {
2809                 pr_err("Unable to extract new ALUA access state from"
2810                                 " %s\n", page);
2811                 return ret;
2812         }
2813         new_state = (int)tmp;
2814
2815         if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2816                 pr_err("Unable to process implicit configfs ALUA"
2817                         " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2818                 return -EINVAL;
2819         }
2820         if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2821             new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2822                 /* LBA DEPENDENT is only allowed with implicit ALUA */
2823                 pr_err("Unable to process implicit configfs ALUA transition"
2824                        " while explicit ALUA management is enabled\n");
2825                 return -EINVAL;
2826         }
2827
2828         ret = core_alua_do_port_transition(tg_pt_gp, dev,
2829                                         NULL, NULL, new_state, 0);
2830         return (!ret) ? count : -EINVAL;
2831 }
2832
2833 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item,
2834                 char *page)
2835 {
2836         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2837         return sprintf(page, "%s\n",
2838                 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2839 }
2840
2841 static ssize_t target_tg_pt_gp_alua_access_status_store(
2842                 struct config_item *item, const char *page, size_t count)
2843 {
2844         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2845         unsigned long tmp;
2846         int new_status, ret;
2847
2848         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2849                 pr_err("Unable to set ALUA access status on invalid tg_pt_gp ID\n");
2850                 return -EINVAL;
2851         }
2852
2853         ret = kstrtoul(page, 0, &tmp);
2854         if (ret < 0) {
2855                 pr_err("Unable to extract new ALUA access status"
2856                                 " from %s\n", page);
2857                 return ret;
2858         }
2859         new_status = (int)tmp;
2860
2861         if ((new_status != ALUA_STATUS_NONE) &&
2862             (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2863             (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2864                 pr_err("Illegal ALUA access status: 0x%02x\n",
2865                                 new_status);
2866                 return -EINVAL;
2867         }
2868
2869         tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2870         return count;
2871 }
2872
2873 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item,
2874                 char *page)
2875 {
2876         return core_alua_show_access_type(to_tg_pt_gp(item), page);
2877 }
2878
2879 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item,
2880                 const char *page, size_t count)
2881 {
2882         return core_alua_store_access_type(to_tg_pt_gp(item), page, count);
2883 }
2884
2885 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit)                          \
2886 static ssize_t target_tg_pt_gp_alua_support_##_name##_show(             \
2887                 struct config_item *item, char *p)                      \
2888 {                                                                       \
2889         struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item);                \
2890         return sprintf(p, "%d\n",                                       \
2891                 !!(t->tg_pt_gp_alua_supported_states & _bit));          \
2892 }                                                                       \
2893                                                                         \
2894 static ssize_t target_tg_pt_gp_alua_support_##_name##_store(            \
2895                 struct config_item *item, const char *p, size_t c)      \
2896 {                                                                       \
2897         struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item);                \
2898         unsigned long tmp;                                              \
2899         int ret;                                                        \
2900                                                                         \
2901         if (!t->tg_pt_gp_valid_id) {                                    \
2902                 pr_err("Unable to set " #_name " ALUA state on invalid tg_pt_gp ID\n"); \
2903                 return -EINVAL;                                         \
2904         }                                                               \
2905                                                                         \
2906         ret = kstrtoul(p, 0, &tmp);                                     \
2907         if (ret < 0) {                                                  \
2908                 pr_err("Invalid value '%s', must be '0' or '1'\n", p);  \
2909                 return -EINVAL;                                         \
2910         }                                                               \
2911         if (tmp > 1) {                                                  \
2912                 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2913                 return -EINVAL;                                         \
2914         }                                                               \
2915         if (tmp)                                                        \
2916                 t->tg_pt_gp_alua_supported_states |= _bit;              \
2917         else                                                            \
2918                 t->tg_pt_gp_alua_supported_states &= ~_bit;             \
2919                                                                         \
2920         return c;                                                       \
2921 }
2922
2923 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP);
2924 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP);
2925 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP);
2926 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP);
2927 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP);
2928 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP);
2929 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP);
2930
2931 static ssize_t target_tg_pt_gp_alua_write_metadata_show(
2932                 struct config_item *item, char *page)
2933 {
2934         return sprintf(page, "%d\n",
2935                 to_tg_pt_gp(item)->tg_pt_gp_write_metadata);
2936 }
2937
2938 static ssize_t target_tg_pt_gp_alua_write_metadata_store(
2939                 struct config_item *item, const char *page, size_t count)
2940 {
2941         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2942         unsigned long tmp;
2943         int ret;
2944
2945         ret = kstrtoul(page, 0, &tmp);
2946         if (ret < 0) {
2947                 pr_err("Unable to extract alua_write_metadata\n");
2948                 return ret;
2949         }
2950
2951         if ((tmp != 0) && (tmp != 1)) {
2952                 pr_err("Illegal value for alua_write_metadata:"
2953                         " %lu\n", tmp);
2954                 return -EINVAL;
2955         }
2956         tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2957
2958         return count;
2959 }
2960
2961 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item,
2962                 char *page)
2963 {
2964         return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page);
2965 }
2966
2967 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item,
2968                 const char *page, size_t count)
2969 {
2970         return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page,
2971                         count);
2972 }
2973
2974 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item,
2975                 char *page)
2976 {
2977         return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page);
2978 }
2979
2980 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item,
2981                 const char *page, size_t count)
2982 {
2983         return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page,
2984                         count);
2985 }
2986
2987 static ssize_t target_tg_pt_gp_implicit_trans_secs_show(
2988                 struct config_item *item, char *page)
2989 {
2990         return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page);
2991 }
2992
2993 static ssize_t target_tg_pt_gp_implicit_trans_secs_store(
2994                 struct config_item *item, const char *page, size_t count)
2995 {
2996         return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page,
2997                         count);
2998 }
2999
3000 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item,
3001                 char *page)
3002 {
3003         return core_alua_show_preferred_bit(to_tg_pt_gp(item), page);
3004 }
3005
3006 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item,
3007                 const char *page, size_t count)
3008 {
3009         return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count);
3010 }
3011
3012 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item,
3013                 char *page)
3014 {
3015         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
3016
3017         if (!tg_pt_gp->tg_pt_gp_valid_id)
3018                 return 0;
3019         return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
3020 }
3021
3022 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item,
3023                 const char *page, size_t count)
3024 {
3025         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
3026         struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
3027         unsigned long tg_pt_gp_id;
3028         int ret;
3029
3030         ret = kstrtoul(page, 0, &tg_pt_gp_id);
3031         if (ret < 0) {
3032                 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n",
3033                        page);
3034                 return ret;
3035         }
3036         if (tg_pt_gp_id > 0x0000ffff) {
3037                 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n",
3038                        tg_pt_gp_id);
3039                 return -EINVAL;
3040         }
3041
3042         ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
3043         if (ret < 0)
3044                 return -EINVAL;
3045
3046         pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
3047                 "core/alua/tg_pt_gps/%s to ID: %hu\n",
3048                 config_item_name(&alua_tg_pt_gp_cg->cg_item),
3049                 tg_pt_gp->tg_pt_gp_id);
3050
3051         return count;
3052 }
3053
3054 static ssize_t target_tg_pt_gp_members_show(struct config_item *item,
3055                 char *page)
3056 {
3057         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
3058         struct se_lun *lun;
3059         ssize_t len = 0, cur_len;
3060         unsigned char buf[TG_PT_GROUP_NAME_BUF] = { };
3061
3062         spin_lock(&tg_pt_gp->tg_pt_gp_lock);
3063         list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
3064                         lun_tg_pt_gp_link) {
3065                 struct se_portal_group *tpg = lun->lun_tpg;
3066
3067                 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
3068                         "/%s\n", tpg->se_tpg_tfo->fabric_name,
3069                         tpg->se_tpg_tfo->tpg_get_wwn(tpg),
3070                         tpg->se_tpg_tfo->tpg_get_tag(tpg),
3071                         config_item_name(&lun->lun_group.cg_item));
3072                 cur_len++; /* Extra byte for NULL terminator */
3073
3074                 if ((cur_len + len) > PAGE_SIZE) {
3075                         pr_warn("Ran out of lu_gp_show_attr"
3076                                 "_members buffer\n");
3077                         break;
3078                 }
3079                 memcpy(page+len, buf, cur_len);
3080                 len += cur_len;
3081         }
3082         spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
3083
3084         return len;
3085 }
3086
3087 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state);
3088 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status);
3089 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type);
3090 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning);
3091 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline);
3092 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent);
3093 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable);
3094 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby);
3095 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized);
3096 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized);
3097 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata);
3098 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs);
3099 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs);
3100 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs);
3101 CONFIGFS_ATTR(target_tg_pt_gp_, preferred);
3102 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id);
3103 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members);
3104
3105 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
3106         &target_tg_pt_gp_attr_alua_access_state,
3107         &target_tg_pt_gp_attr_alua_access_status,
3108         &target_tg_pt_gp_attr_alua_access_type,
3109         &target_tg_pt_gp_attr_alua_support_transitioning,
3110         &target_tg_pt_gp_attr_alua_support_offline,
3111         &target_tg_pt_gp_attr_alua_support_lba_dependent,
3112         &target_tg_pt_gp_attr_alua_support_unavailable,
3113         &target_tg_pt_gp_attr_alua_support_standby,
3114         &target_tg_pt_gp_attr_alua_support_active_nonoptimized,
3115         &target_tg_pt_gp_attr_alua_support_active_optimized,
3116         &target_tg_pt_gp_attr_alua_write_metadata,
3117         &target_tg_pt_gp_attr_nonop_delay_msecs,
3118         &target_tg_pt_gp_attr_trans_delay_msecs,
3119         &target_tg_pt_gp_attr_implicit_trans_secs,
3120         &target_tg_pt_gp_attr_preferred,
3121         &target_tg_pt_gp_attr_tg_pt_gp_id,
3122         &target_tg_pt_gp_attr_members,
3123         NULL,
3124 };
3125
3126 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
3127 {
3128         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3129                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3130
3131         core_alua_free_tg_pt_gp(tg_pt_gp);
3132 }
3133
3134 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
3135         .release                = target_core_alua_tg_pt_gp_release,
3136 };
3137
3138 static const struct config_item_type target_core_alua_tg_pt_gp_cit = {
3139         .ct_item_ops            = &target_core_alua_tg_pt_gp_ops,
3140         .ct_attrs               = target_core_alua_tg_pt_gp_attrs,
3141         .ct_owner               = THIS_MODULE,
3142 };
3143
3144 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
3145
3146 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3147
3148 static struct config_group *target_core_alua_create_tg_pt_gp(
3149         struct config_group *group,
3150         const char *name)
3151 {
3152         struct t10_alua *alua = container_of(group, struct t10_alua,
3153                                         alua_tg_pt_gps_group);
3154         struct t10_alua_tg_pt_gp *tg_pt_gp;
3155         struct config_group *alua_tg_pt_gp_cg = NULL;
3156         struct config_item *alua_tg_pt_gp_ci = NULL;
3157
3158         tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
3159         if (!tg_pt_gp)
3160                 return NULL;
3161
3162         alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
3163         alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
3164
3165         config_group_init_type_name(alua_tg_pt_gp_cg, name,
3166                         &target_core_alua_tg_pt_gp_cit);
3167
3168         pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
3169                 " Group: alua/tg_pt_gps/%s\n",
3170                 config_item_name(alua_tg_pt_gp_ci));
3171
3172         return alua_tg_pt_gp_cg;
3173 }
3174
3175 static void target_core_alua_drop_tg_pt_gp(
3176         struct config_group *group,
3177         struct config_item *item)
3178 {
3179         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3180                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3181
3182         pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
3183                 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
3184                 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
3185         /*
3186          * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
3187          * -> target_core_alua_tg_pt_gp_release().
3188          */
3189         config_item_put(item);
3190 }
3191
3192 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
3193         .make_group             = &target_core_alua_create_tg_pt_gp,
3194         .drop_item              = &target_core_alua_drop_tg_pt_gp,
3195 };
3196
3197 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
3198
3199 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3200
3201 /* Start functions for struct config_item_type target_core_alua_cit */
3202
3203 /*
3204  * target_core_alua_cit is a ConfigFS group that lives under
3205  * /sys/kernel/config/target/core/alua.  There are default groups
3206  * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
3207  * target_core_alua_cit in target_core_init_configfs() below.
3208  */
3209 static const struct config_item_type target_core_alua_cit = {
3210         .ct_item_ops            = NULL,
3211         .ct_attrs               = NULL,
3212         .ct_owner               = THIS_MODULE,
3213 };
3214
3215 /* End functions for struct config_item_type target_core_alua_cit */
3216
3217 /* Start functions for struct config_item_type tb_dev_stat_cit */
3218
3219 static struct config_group *target_core_stat_mkdir(
3220         struct config_group *group,
3221         const char *name)
3222 {
3223         return ERR_PTR(-ENOSYS);
3224 }
3225
3226 static void target_core_stat_rmdir(
3227         struct config_group *group,
3228         struct config_item *item)
3229 {
3230         return;
3231 }
3232
3233 static struct configfs_group_operations target_core_stat_group_ops = {
3234         .make_group             = &target_core_stat_mkdir,
3235         .drop_item              = &target_core_stat_rmdir,
3236 };
3237
3238 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
3239
3240 /* End functions for struct config_item_type tb_dev_stat_cit */
3241
3242 /* Start functions for struct config_item_type target_core_hba_cit */
3243
3244 static struct config_group *target_core_make_subdev(
3245         struct config_group *group,
3246         const char *name)
3247 {
3248         struct t10_alua_tg_pt_gp *tg_pt_gp;
3249         struct config_item *hba_ci = &group->cg_item;
3250         struct se_hba *hba = item_to_hba(hba_ci);
3251         struct target_backend *tb = hba->backend;
3252         struct se_device *dev;
3253         int errno = -ENOMEM, ret;
3254
3255         ret = mutex_lock_interruptible(&hba->hba_access_mutex);
3256         if (ret)
3257                 return ERR_PTR(ret);
3258
3259         dev = target_alloc_device(hba, name);
3260         if (!dev)
3261                 goto out_unlock;
3262
3263         config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit);
3264
3265         config_group_init_type_name(&dev->dev_action_group, "action",
3266                         &tb->tb_dev_action_cit);
3267         configfs_add_default_group(&dev->dev_action_group, &dev->dev_group);
3268
3269         config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
3270                         &tb->tb_dev_attrib_cit);
3271         configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group);
3272
3273         config_group_init_type_name(&dev->dev_pr_group, "pr",
3274                         &tb->tb_dev_pr_cit);
3275         configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group);
3276
3277         config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
3278                         &tb->tb_dev_wwn_cit);
3279         configfs_add_default_group(&dev->t10_wwn.t10_wwn_group,
3280                         &dev->dev_group);
3281
3282         config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
3283                         "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
3284         configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group,
3285                         &dev->dev_group);
3286
3287         config_group_init_type_name(&dev->dev_stat_grps.stat_group,
3288                         "statistics", &tb->tb_dev_stat_cit);
3289         configfs_add_default_group(&dev->dev_stat_grps.stat_group,
3290                         &dev->dev_group);
3291
3292         /*
3293          * Add core/$HBA/$DEV/alua/default_tg_pt_gp
3294          */
3295         tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
3296         if (!tg_pt_gp)
3297                 goto out_free_device;
3298         dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
3299
3300         config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
3301                         "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
3302         configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group,
3303                         &dev->t10_alua.alua_tg_pt_gps_group);
3304
3305         /*
3306          * Add core/$HBA/$DEV/statistics/ default groups
3307          */
3308         target_stat_setup_dev_default_groups(dev);
3309
3310         mutex_unlock(&hba->hba_access_mutex);
3311         return &dev->dev_group;
3312
3313 out_free_device:
3314         target_free_device(dev);
3315 out_unlock:
3316         mutex_unlock(&hba->hba_access_mutex);
3317         return ERR_PTR(errno);
3318 }
3319
3320 static void target_core_drop_subdev(
3321         struct config_group *group,
3322         struct config_item *item)
3323 {
3324         struct config_group *dev_cg = to_config_group(item);
3325         struct se_device *dev =
3326                 container_of(dev_cg, struct se_device, dev_group);
3327         struct se_hba *hba;
3328
3329         hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
3330
3331         mutex_lock(&hba->hba_access_mutex);
3332
3333         configfs_remove_default_groups(&dev->dev_stat_grps.stat_group);
3334         configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group);
3335
3336         /*
3337          * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
3338          * directly from target_core_alua_tg_pt_gp_release().
3339          */
3340         dev->t10_alua.default_tg_pt_gp = NULL;
3341
3342         configfs_remove_default_groups(dev_cg);
3343
3344         /*
3345          * se_dev is released from target_core_dev_item_ops->release()
3346          */
3347         config_item_put(item);
3348         mutex_unlock(&hba->hba_access_mutex);
3349 }
3350
3351 static struct configfs_group_operations target_core_hba_group_ops = {
3352         .make_group             = target_core_make_subdev,
3353         .drop_item              = target_core_drop_subdev,
3354 };
3355
3356
3357 static inline struct se_hba *to_hba(struct config_item *item)
3358 {
3359         return container_of(to_config_group(item), struct se_hba, hba_group);
3360 }
3361
3362 static ssize_t target_hba_info_show(struct config_item *item, char *page)
3363 {
3364         struct se_hba *hba = to_hba(item);
3365
3366         return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
3367                         hba->hba_id, hba->backend->ops->name,
3368                         TARGET_CORE_VERSION);
3369 }
3370
3371 static ssize_t target_hba_mode_show(struct config_item *item, char *page)
3372 {
3373         struct se_hba *hba = to_hba(item);
3374         int hba_mode = 0;
3375
3376         if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
3377                 hba_mode = 1;
3378
3379         return sprintf(page, "%d\n", hba_mode);
3380 }
3381
3382 static ssize_t target_hba_mode_store(struct config_item *item,
3383                 const char *page, size_t count)
3384 {
3385         struct se_hba *hba = to_hba(item);
3386         unsigned long mode_flag;
3387         int ret;
3388
3389         if (hba->backend->ops->pmode_enable_hba == NULL)
3390                 return -EINVAL;
3391
3392         ret = kstrtoul(page, 0, &mode_flag);
3393         if (ret < 0) {
3394                 pr_err("Unable to extract hba mode flag: %d\n", ret);
3395                 return ret;
3396         }
3397
3398         if (hba->dev_count) {
3399                 pr_err("Unable to set hba_mode with active devices\n");
3400                 return -EINVAL;
3401         }
3402
3403         ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
3404         if (ret < 0)
3405                 return -EINVAL;
3406         if (ret > 0)
3407                 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3408         else if (ret == 0)
3409                 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3410
3411         return count;
3412 }
3413
3414 CONFIGFS_ATTR_RO(target_, hba_info);
3415 CONFIGFS_ATTR(target_, hba_mode);
3416
3417 static void target_core_hba_release(struct config_item *item)
3418 {
3419         struct se_hba *hba = container_of(to_config_group(item),
3420                                 struct se_hba, hba_group);
3421         core_delete_hba(hba);
3422 }
3423
3424 static struct configfs_attribute *target_core_hba_attrs[] = {
3425         &target_attr_hba_info,
3426         &target_attr_hba_mode,
3427         NULL,
3428 };
3429
3430 static struct configfs_item_operations target_core_hba_item_ops = {
3431         .release                = target_core_hba_release,
3432 };
3433
3434 static const struct config_item_type target_core_hba_cit = {
3435         .ct_item_ops            = &target_core_hba_item_ops,
3436         .ct_group_ops           = &target_core_hba_group_ops,
3437         .ct_attrs               = target_core_hba_attrs,
3438         .ct_owner               = THIS_MODULE,
3439 };
3440
3441 static struct config_group *target_core_call_addhbatotarget(
3442         struct config_group *group,
3443         const char *name)
3444 {
3445         char *se_plugin_str, *str, *str2;
3446         struct se_hba *hba;
3447         char buf[TARGET_CORE_NAME_MAX_LEN] = { };
3448         unsigned long plugin_dep_id = 0;
3449         int ret;
3450
3451         if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3452                 pr_err("Passed *name strlen(): %d exceeds"
3453                         " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3454                         TARGET_CORE_NAME_MAX_LEN);
3455                 return ERR_PTR(-ENAMETOOLONG);
3456         }
3457         snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3458
3459         str = strstr(buf, "_");
3460         if (!str) {
3461                 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3462                 return ERR_PTR(-EINVAL);
3463         }
3464         se_plugin_str = buf;
3465         /*
3466          * Special case for subsystem plugins that have "_" in their names.
3467          * Namely rd_direct and rd_mcp..
3468          */
3469         str2 = strstr(str+1, "_");
3470         if (str2) {
3471                 *str2 = '\0'; /* Terminate for *se_plugin_str */
3472                 str2++; /* Skip to start of plugin dependent ID */
3473                 str = str2;
3474         } else {
3475                 *str = '\0'; /* Terminate for *se_plugin_str */
3476                 str++; /* Skip to start of plugin dependent ID */
3477         }
3478
3479         ret = kstrtoul(str, 0, &plugin_dep_id);
3480         if (ret < 0) {
3481                 pr_err("kstrtoul() returned %d for"
3482                                 " plugin_dep_id\n", ret);
3483                 return ERR_PTR(ret);
3484         }
3485         /*
3486          * Load up TCM subsystem plugins if they have not already been loaded.
3487          */
3488         transport_subsystem_check_init();
3489
3490         hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3491         if (IS_ERR(hba))
3492                 return ERR_CAST(hba);
3493
3494         config_group_init_type_name(&hba->hba_group, name,
3495                         &target_core_hba_cit);
3496
3497         return &hba->hba_group;
3498 }
3499
3500 static void target_core_call_delhbafromtarget(
3501         struct config_group *group,
3502         struct config_item *item)
3503 {
3504         /*
3505          * core_delete_hba() is called from target_core_hba_item_ops->release()
3506          * -> target_core_hba_release()
3507          */
3508         config_item_put(item);
3509 }
3510
3511 static struct configfs_group_operations target_core_group_ops = {
3512         .make_group     = target_core_call_addhbatotarget,
3513         .drop_item      = target_core_call_delhbafromtarget,
3514 };
3515
3516 static const struct config_item_type target_core_cit = {
3517         .ct_item_ops    = NULL,
3518         .ct_group_ops   = &target_core_group_ops,
3519         .ct_attrs       = NULL,
3520         .ct_owner       = THIS_MODULE,
3521 };
3522
3523 /* Stop functions for struct config_item_type target_core_hba_cit */
3524
3525 void target_setup_backend_cits(struct target_backend *tb)
3526 {
3527         target_core_setup_dev_cit(tb);
3528         target_core_setup_dev_action_cit(tb);
3529         target_core_setup_dev_attrib_cit(tb);
3530         target_core_setup_dev_pr_cit(tb);
3531         target_core_setup_dev_wwn_cit(tb);
3532         target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3533         target_core_setup_dev_stat_cit(tb);
3534 }
3535
3536 static void target_init_dbroot(void)
3537 {
3538         struct file *fp;
3539
3540         snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED);
3541         fp = filp_open(db_root_stage, O_RDONLY, 0);
3542         if (IS_ERR(fp)) {
3543                 pr_err("db_root: cannot open: %s\n", db_root_stage);
3544                 return;
3545         }
3546         if (!S_ISDIR(file_inode(fp)->i_mode)) {
3547                 filp_close(fp, NULL);
3548                 pr_err("db_root: not a valid directory: %s\n", db_root_stage);
3549                 return;
3550         }
3551         filp_close(fp, NULL);
3552
3553         strncpy(db_root, db_root_stage, DB_ROOT_LEN);
3554         pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
3555 }
3556
3557 static int __init target_core_init_configfs(void)
3558 {
3559         struct configfs_subsystem *subsys = &target_core_fabrics;
3560         struct t10_alua_lu_gp *lu_gp;
3561         int ret;
3562
3563         pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3564                 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3565                 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3566
3567         config_group_init(&subsys->su_group);
3568         mutex_init(&subsys->su_mutex);
3569
3570         ret = init_se_kmem_caches();
3571         if (ret < 0)
3572                 return ret;
3573         /*
3574          * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3575          * and ALUA Logical Unit Group and Target Port Group infrastructure.
3576          */
3577         config_group_init_type_name(&target_core_hbagroup, "core",
3578                         &target_core_cit);
3579         configfs_add_default_group(&target_core_hbagroup, &subsys->su_group);
3580
3581         /*
3582          * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3583          */
3584         config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit);
3585         configfs_add_default_group(&alua_group, &target_core_hbagroup);
3586
3587         /*
3588          * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3589          * groups under /sys/kernel/config/target/core/alua/
3590          */
3591         config_group_init_type_name(&alua_lu_gps_group, "lu_gps",
3592                         &target_core_alua_lu_gps_cit);
3593         configfs_add_default_group(&alua_lu_gps_group, &alua_group);
3594
3595         /*
3596          * Add core/alua/lu_gps/default_lu_gp
3597          */
3598         lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3599         if (IS_ERR(lu_gp)) {
3600                 ret = -ENOMEM;
3601                 goto out_global;
3602         }
3603
3604         config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3605                                 &target_core_alua_lu_gp_cit);
3606         configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group);
3607
3608         default_lu_gp = lu_gp;
3609
3610         /*
3611          * Register the target_core_mod subsystem with configfs.
3612          */
3613         ret = configfs_register_subsystem(subsys);
3614         if (ret < 0) {
3615                 pr_err("Error %d while registering subsystem %s\n",
3616                         ret, subsys->su_group.cg_item.ci_namebuf);
3617                 goto out_global;
3618         }
3619         pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3620                 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
3621                 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3622         /*
3623          * Register built-in RAMDISK subsystem logic for virtual LUN 0
3624          */
3625         ret = rd_module_init();
3626         if (ret < 0)
3627                 goto out;
3628
3629         ret = core_dev_setup_virtual_lun0();
3630         if (ret < 0)
3631                 goto out;
3632
3633         ret = target_xcopy_setup_pt();
3634         if (ret < 0)
3635                 goto out;
3636
3637         target_init_dbroot();
3638
3639         return 0;
3640
3641 out:
3642         configfs_unregister_subsystem(subsys);
3643         core_dev_release_virtual_lun0();
3644         rd_module_exit();
3645 out_global:
3646         if (default_lu_gp) {
3647                 core_alua_free_lu_gp(default_lu_gp);
3648                 default_lu_gp = NULL;
3649         }
3650         release_se_kmem_caches();
3651         return ret;
3652 }
3653
3654 static void __exit target_core_exit_configfs(void)
3655 {
3656         configfs_remove_default_groups(&alua_lu_gps_group);
3657         configfs_remove_default_groups(&alua_group);
3658         configfs_remove_default_groups(&target_core_hbagroup);
3659
3660         /*
3661          * We expect subsys->su_group.default_groups to be released
3662          * by configfs subsystem provider logic..
3663          */
3664         configfs_unregister_subsystem(&target_core_fabrics);
3665
3666         core_alua_free_lu_gp(default_lu_gp);
3667         default_lu_gp = NULL;
3668
3669         pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3670                         " Infrastructure\n");
3671
3672         core_dev_release_virtual_lun0();
3673         rd_module_exit();
3674         target_xcopy_release_pt();
3675         release_se_kmem_caches();
3676 }
3677
3678 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3679 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3680 MODULE_LICENSE("GPL");
3681
3682 module_init(target_core_init_configfs);
3683 module_exit(target_core_exit_configfs);