drivers/target/target_core_configfs.c

   1 /*******************************************************************************
   2  * Filename:  target_core_configfs.c
   3  *
   4  * This file contains ConfigFS logic for the Generic Target Engine project.
   5  *
   6  * (c) Copyright 2008-2013 Datera, Inc.
   7  *
   8  * Nicholas A. Bellinger <nab@kernel.org>
   9  *
  10  * based on configfs Copyright (C) 2005 Oracle.  All rights reserved.
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  ****************************************************************************/
  22
  23 #include <linux/module.h>
  24 #include <linux/moduleparam.h>
  25 #include <generated/utsrelease.h>
  26 #include <linux/utsname.h>
  27 #include <linux/init.h>
  28 #include <linux/fs.h>
  29 #include <linux/namei.h>
  30 #include <linux/slab.h>
  31 #include <linux/types.h>
  32 #include <linux/delay.h>
  33 #include <linux/unistd.h>
  34 #include <linux/string.h>
  35 #include <linux/parser.h>
  36 #include <linux/syscalls.h>
  37 #include <linux/configfs.h>
  38 #include <linux/spinlock.h>
  39
  40 #include <target/target_core_base.h>
  41 #include <target/target_core_backend.h>
  42 #include <target/target_core_fabric.h>
  43 #include <target/target_core_fabric_configfs.h>
  44 #include <target/target_core_configfs.h>
  45 #include <target/configfs_macros.h>
  46
  47 #include "target_core_internal.h"
  48 #include "target_core_alua.h"
  49 #include "target_core_pr.h"
  50 #include "target_core_rd.h"
  51 #include "target_core_xcopy.h"
  52
  53 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs)              \
  54 static void target_core_setup_##_name##_cit(struct target_backend *tb)  \
  55 {                                                                       \
  56         struct config_item_type *cit = &tb->tb_##_name##_cit;           \
  57                                                                         \
  58         cit->ct_item_ops = _item_ops;                                   \
  59         cit->ct_group_ops = _group_ops;                                 \
  60         cit->ct_attrs = _attrs;                                         \
  61         cit->ct_owner = tb->ops->owner;                                 \
  62         pr_debug("Setup generic %s\n", __stringify(_name));             \
  63 }
  64
  65 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops)                  \
  66 static void target_core_setup_##_name##_cit(struct target_backend *tb)  \
  67 {                                                                       \
  68         struct config_item_type *cit = &tb->tb_##_name##_cit;           \
  69                                                                         \
  70         cit->ct_item_ops = _item_ops;                                   \
  71         cit->ct_group_ops = _group_ops;                                 \
  72         cit->ct_attrs = tb->ops->tb_##_name##_attrs;                    \
  73         cit->ct_owner = tb->ops->owner;                                 \
  74         pr_debug("Setup generic %s\n", __stringify(_name));             \
  75 }
  76
  77 extern struct t10_alua_lu_gp *default_lu_gp;
  78
  79 static LIST_HEAD(g_tf_list);
  80 static DEFINE_MUTEX(g_tf_lock);
  81
  82 struct target_core_configfs_attribute {
  83         struct configfs_attribute attr;
  84         ssize_t (*show)(void *, char *);
  85         ssize_t (*store)(void *, const char *, size_t);
  86 };
  87
  88 static struct config_group target_core_hbagroup;
  89 static struct config_group alua_group;
  90 static struct config_group alua_lu_gps_group;
  91
  92 static inline struct se_hba *
  93 item_to_hba(struct config_item *item)
  94 {
  95         return container_of(to_config_group(item), struct se_hba, hba_group);
  96 }
  97
  98 /*
  99  * Attributes for /sys/kernel/config/target/
 100  */
 101 static ssize_t target_core_attr_show(struct config_item *item,
 102                                       struct configfs_attribute *attr,
 103                                       char *page)
 104 {
 105         return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
 106                 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
 107                 utsname()->sysname, utsname()->machine);
 108 }
 109
 110 static struct configfs_item_operations target_core_fabric_item_ops = {
 111         .show_attribute = target_core_attr_show,
 112 };
 113
 114 static struct configfs_attribute target_core_item_attr_version = {
 115         .ca_owner       = THIS_MODULE,
 116         .ca_name        = "version",
 117         .ca_mode        = S_IRUGO,
 118 };
 119
 120 static struct target_fabric_configfs *target_core_get_fabric(
 121         const char *name)
 122 {
 123         struct target_fabric_configfs *tf;
 124
 125         if (!name)
 126                 return NULL;
 127
 128         mutex_lock(&g_tf_lock);
 129         list_for_each_entry(tf, &g_tf_list, tf_list) {
 130                 if (!strcmp(tf->tf_ops->name, name)) {
 131                         atomic_inc(&tf->tf_access_cnt);
 132                         mutex_unlock(&g_tf_lock);
 133                         return tf;
 134                 }
 135         }
 136         mutex_unlock(&g_tf_lock);
 137
 138         return NULL;
 139 }
 140
 141 /*
 142  * Called from struct target_core_group_ops->make_group()
 143  */
 144 static struct config_group *target_core_register_fabric(
 145         struct config_group *group,
 146         const char *name)
 147 {
 148         struct target_fabric_configfs *tf;
 149         int ret;
 150
 151         pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
 152                         " %s\n", group, name);
 153
 154         tf = target_core_get_fabric(name);
 155         if (!tf) {
 156                 pr_debug("target_core_register_fabric() trying autoload for %s\n",
 157                          name);
 158
 159                 /*
 160                  * Below are some hardcoded request_module() calls to automatically
 161                  * local fabric modules when the following is called:
 162                  *
 163                  * mkdir -p /sys/kernel/config/target/$MODULE_NAME
 164                  *
 165                  * Note that this does not limit which TCM fabric module can be
 166                  * registered, but simply provids auto loading logic for modules with
 167                  * mkdir(2) system calls with known TCM fabric modules.
 168                  */
 169
 170                 if (!strncmp(name, "iscsi", 5)) {
 171                         /*
 172                          * Automatically load the LIO Target fabric module when the
 173                          * following is called:
 174                          *
 175                          * mkdir -p $CONFIGFS/target/iscsi
 176                          */
 177                         ret = request_module("iscsi_target_mod");
 178                         if (ret < 0) {
 179                                 pr_debug("request_module() failed for"
 180                                          " iscsi_target_mod.ko: %d\n", ret);
 181                                 return ERR_PTR(-EINVAL);
 182                         }
 183                 } else if (!strncmp(name, "loopback", 8)) {
 184                         /*
 185                          * Automatically load the tcm_loop fabric module when the
 186                          * following is called:
 187                          *
 188                          * mkdir -p $CONFIGFS/target/loopback
 189                          */
 190                         ret = request_module("tcm_loop");
 191                         if (ret < 0) {
 192                                 pr_debug("request_module() failed for"
 193                                          " tcm_loop.ko: %d\n", ret);
 194                                 return ERR_PTR(-EINVAL);
 195                         }
 196                 }
 197
 198                 tf = target_core_get_fabric(name);
 199         }
 200
 201         if (!tf) {
 202                 pr_debug("target_core_get_fabric() failed for %s\n",
 203                          name);
 204                 return ERR_PTR(-EINVAL);
 205         }
 206         pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
 207                         " %s\n", tf->tf_ops->name);
 208         /*
 209          * On a successful target_core_get_fabric() look, the returned
 210          * struct target_fabric_configfs *tf will contain a usage reference.
 211          */
 212         pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
 213                         &tf->tf_wwn_cit);
 214
 215         tf->tf_group.default_groups = tf->tf_default_groups;
 216         tf->tf_group.default_groups[0] = &tf->tf_disc_group;
 217         tf->tf_group.default_groups[1] = NULL;
 218
 219         config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit);
 220         config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
 221                         &tf->tf_discovery_cit);
 222
 223         pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
 224                         " %s\n", tf->tf_group.cg_item.ci_name);
 225         return &tf->tf_group;
 226 }
 227
 228 /*
 229  * Called from struct target_core_group_ops->drop_item()
 230  */
 231 static void target_core_deregister_fabric(
 232         struct config_group *group,
 233         struct config_item *item)
 234 {
 235         struct target_fabric_configfs *tf = container_of(
 236                 to_config_group(item), struct target_fabric_configfs, tf_group);
 237         struct config_group *tf_group;
 238         struct config_item *df_item;
 239         int i;
 240
 241         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
 242                 " tf list\n", config_item_name(item));
 243
 244         pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
 245                         " %s\n", tf->tf_ops->name);
 246         atomic_dec(&tf->tf_access_cnt);
 247
 248         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
 249                         " %s\n", config_item_name(item));
 250
 251         tf_group = &tf->tf_group;
 252         for (i = 0; tf_group->default_groups[i]; i++) {
 253                 df_item = &tf_group->default_groups[i]->cg_item;
 254                 tf_group->default_groups[i] = NULL;
 255                 config_item_put(df_item);
 256         }
 257         config_item_put(item);
 258 }
 259
 260 static struct configfs_group_operations target_core_fabric_group_ops = {
 261         .make_group     = &target_core_register_fabric,
 262         .drop_item      = &target_core_deregister_fabric,
 263 };
 264
 265 /*
 266  * All item attributes appearing in /sys/kernel/target/ appear here.
 267  */
 268 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
 269         &target_core_item_attr_version,
 270         NULL,
 271 };
 272
 273 /*
 274  * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
 275  */
 276 static struct config_item_type target_core_fabrics_item = {
 277         .ct_item_ops    = &target_core_fabric_item_ops,
 278         .ct_group_ops   = &target_core_fabric_group_ops,
 279         .ct_attrs       = target_core_fabric_item_attrs,
 280         .ct_owner       = THIS_MODULE,
 281 };
 282
 283 static struct configfs_subsystem target_core_fabrics = {
 284         .su_group = {
 285                 .cg_item = {
 286                         .ci_namebuf = "target",
 287                         .ci_type = &target_core_fabrics_item,
 288                 },
 289         },
 290 };
 291
 292 int target_depend_item(struct config_item *item)
 293 {
 294         return configfs_depend_item(&target_core_fabrics, item);
 295 }
 296 EXPORT_SYMBOL(target_depend_item);
 297
 298 void target_undepend_item(struct config_item *item)
 299 {
 300         return configfs_undepend_item(&target_core_fabrics, item);
 301 }
 302 EXPORT_SYMBOL(target_undepend_item);
 303
 304 /*##############################################################################
 305 // Start functions called by external Target Fabrics Modules
 306 //############################################################################*/
 307
 308 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
 309 {
 310         if (!tfo->name) {
 311                 pr_err("Missing tfo->name\n");
 312                 return -EINVAL;
 313         }
 314         if (strlen(tfo->name) >= TARGET_FABRIC_NAME_SIZE) {
 315                 pr_err("Passed name: %s exceeds TARGET_FABRIC"
 316                         "_NAME_SIZE\n", tfo->name);
 317                 return -EINVAL;
 318         }
 319         if (!tfo->get_fabric_name) {
 320                 pr_err("Missing tfo->get_fabric_name()\n");
 321                 return -EINVAL;
 322         }
 323         if (!tfo->tpg_get_wwn) {
 324                 pr_err("Missing tfo->tpg_get_wwn()\n");
 325                 return -EINVAL;
 326         }
 327         if (!tfo->tpg_get_tag) {
 328                 pr_err("Missing tfo->tpg_get_tag()\n");
 329                 return -EINVAL;
 330         }
 331         if (!tfo->tpg_check_demo_mode) {
 332                 pr_err("Missing tfo->tpg_check_demo_mode()\n");
 333                 return -EINVAL;
 334         }
 335         if (!tfo->tpg_check_demo_mode_cache) {
 336                 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
 337                 return -EINVAL;
 338         }
 339         if (!tfo->tpg_check_demo_mode_write_protect) {
 340                 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
 341                 return -EINVAL;
 342         }
 343         if (!tfo->tpg_check_prod_mode_write_protect) {
 344                 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
 345                 return -EINVAL;
 346         }
 347         if (!tfo->tpg_get_inst_index) {
 348                 pr_err("Missing tfo->tpg_get_inst_index()\n");
 349                 return -EINVAL;
 350         }
 351         if (!tfo->release_cmd) {
 352                 pr_err("Missing tfo->release_cmd()\n");
 353                 return -EINVAL;
 354         }
 355         if (!tfo->shutdown_session) {
 356                 pr_err("Missing tfo->shutdown_session()\n");
 357                 return -EINVAL;
 358         }
 359         if (!tfo->close_session) {
 360                 pr_err("Missing tfo->close_session()\n");
 361                 return -EINVAL;
 362         }
 363         if (!tfo->sess_get_index) {
 364                 pr_err("Missing tfo->sess_get_index()\n");
 365                 return -EINVAL;
 366         }
 367         if (!tfo->write_pending) {
 368                 pr_err("Missing tfo->write_pending()\n");
 369                 return -EINVAL;
 370         }
 371         if (!tfo->write_pending_status) {
 372                 pr_err("Missing tfo->write_pending_status()\n");
 373                 return -EINVAL;
 374         }
 375         if (!tfo->set_default_node_attributes) {
 376                 pr_err("Missing tfo->set_default_node_attributes()\n");
 377                 return -EINVAL;
 378         }
 379         if (!tfo->get_cmd_state) {
 380                 pr_err("Missing tfo->get_cmd_state()\n");
 381                 return -EINVAL;
 382         }
 383         if (!tfo->queue_data_in) {
 384                 pr_err("Missing tfo->queue_data_in()\n");
 385                 return -EINVAL;
 386         }
 387         if (!tfo->queue_status) {
 388                 pr_err("Missing tfo->queue_status()\n");
 389                 return -EINVAL;
 390         }
 391         if (!tfo->queue_tm_rsp) {
 392                 pr_err("Missing tfo->queue_tm_rsp()\n");
 393                 return -EINVAL;
 394         }
 395         if (!tfo->aborted_task) {
 396                 pr_err("Missing tfo->aborted_task()\n");
 397                 return -EINVAL;
 398         }
 399         /*
 400          * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
 401          * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
 402          * target_core_fabric_configfs.c WWN+TPG group context code.
 403          */
 404         if (!tfo->fabric_make_wwn) {
 405                 pr_err("Missing tfo->fabric_make_wwn()\n");
 406                 return -EINVAL;
 407         }
 408         if (!tfo->fabric_drop_wwn) {
 409                 pr_err("Missing tfo->fabric_drop_wwn()\n");
 410                 return -EINVAL;
 411         }
 412         if (!tfo->fabric_make_tpg) {
 413                 pr_err("Missing tfo->fabric_make_tpg()\n");
 414                 return -EINVAL;
 415         }
 416         if (!tfo->fabric_drop_tpg) {
 417                 pr_err("Missing tfo->fabric_drop_tpg()\n");
 418                 return -EINVAL;
 419         }
 420
 421         return 0;
 422 }
 423
 424 int target_register_template(const struct target_core_fabric_ops *fo)
 425 {
 426         struct target_fabric_configfs *tf;
 427         int ret;
 428
 429         ret = target_fabric_tf_ops_check(fo);
 430         if (ret)
 431                 return ret;
 432
 433         tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
 434         if (!tf) {
 435                 pr_err("%s: could not allocate memory!\n", __func__);
 436                 return -ENOMEM;
 437         }
 438
 439         INIT_LIST_HEAD(&tf->tf_list);
 440         atomic_set(&tf->tf_access_cnt, 0);
 441         tf->tf_ops = fo;
 442         target_fabric_setup_cits(tf);
 443
 444         mutex_lock(&g_tf_lock);
 445         list_add_tail(&tf->tf_list, &g_tf_list);
 446         mutex_unlock(&g_tf_lock);
 447
 448         return 0;
 449 }
 450 EXPORT_SYMBOL(target_register_template);
 451
 452 void target_unregister_template(const struct target_core_fabric_ops *fo)
 453 {
 454         struct target_fabric_configfs *t;
 455
 456         mutex_lock(&g_tf_lock);
 457         list_for_each_entry(t, &g_tf_list, tf_list) {
 458                 if (!strcmp(t->tf_ops->name, fo->name)) {
 459                         BUG_ON(atomic_read(&t->tf_access_cnt));
 460                         list_del(&t->tf_list);
 461                         kfree(t);
 462                         break;
 463                 }
 464         }
 465         mutex_unlock(&g_tf_lock);
 466 }
 467 EXPORT_SYMBOL(target_unregister_template);
 468
 469 /*##############################################################################
 470 // Stop functions called by external Target Fabrics Modules
 471 //############################################################################*/
 472
 473 /* Start functions for struct config_item_type tb_dev_attrib_cit */
 474 #define DEF_TB_DEV_ATTRIB_SHOW(_name)                                   \
 475 static ssize_t show_##_name(struct se_dev_attrib *da, char *page)       \
 476 {                                                                       \
 477         return snprintf(page, PAGE_SIZE, "%u\n", da->_name);            \
 478 }
 479
 480 DEF_TB_DEV_ATTRIB_SHOW(emulate_model_alias);
 481 DEF_TB_DEV_ATTRIB_SHOW(emulate_dpo);
 482 DEF_TB_DEV_ATTRIB_SHOW(emulate_fua_write);
 483 DEF_TB_DEV_ATTRIB_SHOW(emulate_fua_read);
 484 DEF_TB_DEV_ATTRIB_SHOW(emulate_write_cache);
 485 DEF_TB_DEV_ATTRIB_SHOW(emulate_ua_intlck_ctrl);
 486 DEF_TB_DEV_ATTRIB_SHOW(emulate_tas);
 487 DEF_TB_DEV_ATTRIB_SHOW(emulate_tpu);
 488 DEF_TB_DEV_ATTRIB_SHOW(emulate_tpws);
 489 DEF_TB_DEV_ATTRIB_SHOW(emulate_caw);
 490 DEF_TB_DEV_ATTRIB_SHOW(emulate_3pc);
 491 DEF_TB_DEV_ATTRIB_SHOW(pi_prot_type);
 492 DEF_TB_DEV_ATTRIB_SHOW(hw_pi_prot_type);
 493 DEF_TB_DEV_ATTRIB_SHOW(pi_prot_format);
 494 DEF_TB_DEV_ATTRIB_SHOW(enforce_pr_isids);
 495 DEF_TB_DEV_ATTRIB_SHOW(is_nonrot);
 496 DEF_TB_DEV_ATTRIB_SHOW(emulate_rest_reord);
 497 DEF_TB_DEV_ATTRIB_SHOW(force_pr_aptpl);
 498 DEF_TB_DEV_ATTRIB_SHOW(hw_block_size);
 499 DEF_TB_DEV_ATTRIB_SHOW(block_size);
 500 DEF_TB_DEV_ATTRIB_SHOW(hw_max_sectors);
 501 DEF_TB_DEV_ATTRIB_SHOW(optimal_sectors);
 502 DEF_TB_DEV_ATTRIB_SHOW(hw_queue_depth);
 503 DEF_TB_DEV_ATTRIB_SHOW(queue_depth);
 504 DEF_TB_DEV_ATTRIB_SHOW(max_unmap_lba_count);
 505 DEF_TB_DEV_ATTRIB_SHOW(max_unmap_block_desc_count);
 506 DEF_TB_DEV_ATTRIB_SHOW(unmap_granularity);
 507 DEF_TB_DEV_ATTRIB_SHOW(unmap_granularity_alignment);
 508 DEF_TB_DEV_ATTRIB_SHOW(max_write_same_len);
 509
 510 #define DEF_TB_DEV_ATTRIB_STORE_U32(_name)                              \
 511 static ssize_t store_##_name(struct se_dev_attrib *da, const char *page,\
 512                 size_t count)                                           \
 513 {                                                                       \
 514         u32 val;                                                        \
 515         int ret;                                                        \
 516                                                                         \
 517         ret = kstrtou32(page, 0, &val);                                 \
 518         if (ret < 0)                                                    \
 519                 return ret;                                             \
 520         da->_name = val;                                                \
 521         return count;                                                   \
 522 }
 523
 524 DEF_TB_DEV_ATTRIB_STORE_U32(max_unmap_lba_count);
 525 DEF_TB_DEV_ATTRIB_STORE_U32(max_unmap_block_desc_count);
 526 DEF_TB_DEV_ATTRIB_STORE_U32(unmap_granularity);
 527 DEF_TB_DEV_ATTRIB_STORE_U32(unmap_granularity_alignment);
 528 DEF_TB_DEV_ATTRIB_STORE_U32(max_write_same_len);
 529
 530 #define DEF_TB_DEV_ATTRIB_STORE_BOOL(_name)                             \
 531 static ssize_t store_##_name(struct se_dev_attrib *da, const char *page,\
 532                 size_t count)                                           \
 533 {                                                                       \
 534         bool flag;                                                      \
 535         int ret;                                                        \
 536                                                                         \
 537         ret = strtobool(page, &flag);                                   \
 538         if (ret < 0)                                                    \
 539                 return ret;                                             \
 540         da->_name = flag;                                               \
 541         return count;                                                   \
 542 }
 543
 544 DEF_TB_DEV_ATTRIB_STORE_BOOL(emulate_fua_write);
 545 DEF_TB_DEV_ATTRIB_STORE_BOOL(emulate_caw);
 546 DEF_TB_DEV_ATTRIB_STORE_BOOL(emulate_3pc);
 547 DEF_TB_DEV_ATTRIB_STORE_BOOL(enforce_pr_isids);
 548 DEF_TB_DEV_ATTRIB_STORE_BOOL(is_nonrot);
 549
 550 #define DEF_TB_DEV_ATTRIB_STORE_STUB(_name)                             \
 551 static ssize_t store_##_name(struct se_dev_attrib *da, const char *page,\
 552                 size_t count)                                           \
 553 {                                                                       \
 554         printk_once(KERN_WARNING                                        \
 555                 "ignoring deprecated ##_name## attribute\n");   \
 556         return count;                                                   \
 557 }
 558
 559 DEF_TB_DEV_ATTRIB_STORE_STUB(emulate_dpo);
 560 DEF_TB_DEV_ATTRIB_STORE_STUB(emulate_fua_read);
 561
 562 static void dev_set_t10_wwn_model_alias(struct se_device *dev)
 563 {
 564         const char *configname;
 565
 566         configname = config_item_name(&dev->dev_group.cg_item);
 567         if (strlen(configname) >= 16) {
 568                 pr_warn("dev[%p]: Backstore name '%s' is too long for "
 569                         "INQUIRY_MODEL, truncating to 16 bytes\n", dev,
 570                         configname);
 571         }
 572         snprintf(&dev->t10_wwn.model[0], 16, "%s", configname);
 573 }
 574
 575 static ssize_t store_emulate_model_alias(struct se_dev_attrib *da,
 576                 const char *page, size_t count)
 577 {
 578         struct se_device *dev = da->da_dev;
 579         bool flag;
 580         int ret;
 581
 582         if (dev->export_count) {
 583                 pr_err("dev[%p]: Unable to change model alias"
 584                         " while export_count is %d\n",
 585                         dev, dev->export_count);
 586                 return -EINVAL;
 587         }
 588
 589         ret = strtobool(page, &flag);
 590         if (ret < 0)
 591                 return ret;
 592
 593         if (flag) {
 594                 dev_set_t10_wwn_model_alias(dev);
 595         } else {
 596                 strncpy(&dev->t10_wwn.model[0],
 597                         dev->transport->inquiry_prod, 16);
 598         }
 599         da->emulate_model_alias = flag;
 600         return count;
 601 }
 602
 603 static ssize_t store_emulate_write_cache(struct se_dev_attrib *da,
 604                 const char *page, size_t count)
 605 {
 606         bool flag;
 607         int ret;
 608
 609         ret = strtobool(page, &flag);
 610         if (ret < 0)
 611                 return ret;
 612
 613         if (flag && da->da_dev->transport->get_write_cache) {
 614                 pr_err("emulate_write_cache not supported for this device\n");
 615                 return -EINVAL;
 616         }
 617
 618         da->emulate_write_cache = flag;
 619         pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
 620                         da->da_dev, flag);
 621         return count;
 622 }
 623
 624 static ssize_t store_emulate_ua_intlck_ctrl(struct se_dev_attrib *da,
 625                 const char *page, size_t count)
 626 {
 627         u32 val;
 628         int ret;
 629
 630         ret = kstrtou32(page, 0, &val);
 631         if (ret < 0)
 632                 return ret;
 633
 634         if (val != 0 && val != 1 && val != 2) {
 635                 pr_err("Illegal value %d\n", val);
 636                 return -EINVAL;
 637         }
 638
 639         if (da->da_dev->export_count) {
 640                 pr_err("dev[%p]: Unable to change SE Device"
 641                         " UA_INTRLCK_CTRL while export_count is %d\n",
 642                         da->da_dev, da->da_dev->export_count);
 643                 return -EINVAL;
 644         }
 645         da->emulate_ua_intlck_ctrl = val;
 646         pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
 647                 da->da_dev, val);
 648         return count;
 649 }
 650
 651 static ssize_t store_emulate_tas(struct se_dev_attrib *da,
 652                 const char *page, size_t count)
 653 {
 654         bool flag;
 655         int ret;
 656
 657         ret = strtobool(page, &flag);
 658         if (ret < 0)
 659                 return ret;
 660
 661         if (da->da_dev->export_count) {
 662                 pr_err("dev[%p]: Unable to change SE Device TAS while"
 663                         " export_count is %d\n",
 664                         da->da_dev, da->da_dev->export_count);
 665                 return -EINVAL;
 666         }
 667         da->emulate_tas = flag;
 668         pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
 669                 da->da_dev, flag ? "Enabled" : "Disabled");
 670
 671         return count;
 672 }
 673
 674 static ssize_t store_emulate_tpu(struct se_dev_attrib *da,
 675                 const char *page, size_t count)
 676 {
 677         bool flag;
 678         int ret;
 679
 680         ret = strtobool(page, &flag);
 681         if (ret < 0)
 682                 return ret;
 683
 684         /*
 685          * We expect this value to be non-zero when generic Block Layer
 686          * Discard supported is detected iblock_create_virtdevice().
 687          */
 688         if (flag && !da->max_unmap_block_desc_count) {
 689                 pr_err("Generic Block Discard not supported\n");
 690                 return -ENOSYS;
 691         }
 692
 693         da->emulate_tpu = flag;
 694         pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
 695                 da->da_dev, flag);
 696         return count;
 697 }
 698
 699 static ssize_t store_emulate_tpws(struct se_dev_attrib *da,
 700                 const char *page, size_t count)
 701 {
 702         bool flag;
 703         int ret;
 704
 705         ret = strtobool(page, &flag);
 706         if (ret < 0)
 707                 return ret;
 708
 709         /*
 710          * We expect this value to be non-zero when generic Block Layer
 711          * Discard supported is detected iblock_create_virtdevice().
 712          */
 713         if (flag && !da->max_unmap_block_desc_count) {
 714                 pr_err("Generic Block Discard not supported\n");
 715                 return -ENOSYS;
 716         }
 717
 718         da->emulate_tpws = flag;
 719         pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
 720                                 da->da_dev, flag);
 721         return count;
 722 }
 723
 724 static ssize_t store_pi_prot_type(struct se_dev_attrib *da,
 725                 const char *page, size_t count)
 726 {
 727         int old_prot = da->pi_prot_type, ret;
 728         struct se_device *dev = da->da_dev;
 729         u32 flag;
 730
 731         ret = kstrtou32(page, 0, &flag);
 732         if (ret < 0)
 733                 return ret;
 734
 735         if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
 736                 pr_err("Illegal value %d for pi_prot_type\n", flag);
 737                 return -EINVAL;
 738         }
 739         if (flag == 2) {
 740                 pr_err("DIF TYPE2 protection currently not supported\n");
 741                 return -ENOSYS;
 742         }
 743         if (da->hw_pi_prot_type) {
 744                 pr_warn("DIF protection enabled on underlying hardware,"
 745                         " ignoring\n");
 746                 return count;
 747         }
 748         if (!dev->transport->init_prot || !dev->transport->free_prot) {
 749                 /* 0 is only allowed value for non-supporting backends */
 750                 if (flag == 0)
 751                         return 0;
 752
 753                 pr_err("DIF protection not supported by backend: %s\n",
 754                        dev->transport->name);
 755                 return -ENOSYS;
 756         }
 757         if (!(dev->dev_flags & DF_CONFIGURED)) {
 758                 pr_err("DIF protection requires device to be configured\n");
 759                 return -ENODEV;
 760         }
 761         if (dev->export_count) {
 762                 pr_err("dev[%p]: Unable to change SE Device PROT type while"
 763                        " export_count is %d\n", dev, dev->export_count);
 764                 return -EINVAL;
 765         }
 766
 767         da->pi_prot_type = flag;
 768
 769         if (flag && !old_prot) {
 770                 ret = dev->transport->init_prot(dev);
 771                 if (ret) {
 772                         da->pi_prot_type = old_prot;
 773                         return ret;
 774                 }
 775
 776         } else if (!flag && old_prot) {
 777                 dev->transport->free_prot(dev);
 778         }
 779
 780         pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
 781         return count;
 782 }
 783
 784 static ssize_t store_pi_prot_format(struct se_dev_attrib *da,
 785                 const char *page, size_t count)
 786 {
 787         struct se_device *dev = da->da_dev;
 788         bool flag;
 789         int ret;
 790
 791         ret = strtobool(page, &flag);
 792         if (ret < 0)
 793                 return ret;
 794
 795         if (!flag)
 796                 return count;
 797
 798         if (!dev->transport->format_prot) {
 799                 pr_err("DIF protection format not supported by backend %s\n",
 800                        dev->transport->name);
 801                 return -ENOSYS;
 802         }
 803         if (!(dev->dev_flags & DF_CONFIGURED)) {
 804                 pr_err("DIF protection format requires device to be configured\n");
 805                 return -ENODEV;
 806         }
 807         if (dev->export_count) {
 808                 pr_err("dev[%p]: Unable to format SE Device PROT type while"
 809                        " export_count is %d\n", dev, dev->export_count);
 810                 return -EINVAL;
 811         }
 812
 813         ret = dev->transport->format_prot(dev);
 814         if (ret)
 815                 return ret;
 816
 817         pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
 818         return count;
 819 }
 820
 821 static ssize_t store_force_pr_aptpl(struct se_dev_attrib *da,
 822                 const char *page, size_t count)
 823 {
 824         bool flag;
 825         int ret;
 826
 827         ret = strtobool(page, &flag);
 828         if (ret < 0)
 829                 return ret;
 830         if (da->da_dev->export_count) {
 831                 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
 832                        " export_count is %d\n",
 833                        da->da_dev, da->da_dev->export_count);
 834                 return -EINVAL;
 835         }
 836
 837         da->force_pr_aptpl = flag;
 838         pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag);
 839         return count;
 840 }
 841
 842 static ssize_t store_emulate_rest_reord(struct se_dev_attrib *da,
 843                 const char *page, size_t count)
 844 {
 845         bool flag;
 846         int ret;
 847
 848         ret = strtobool(page, &flag);
 849         if (ret < 0)
 850                 return ret;
 851
 852         if (flag != 0) {
 853                 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted"
 854                         " reordering not implemented\n", da->da_dev);
 855                 return -ENOSYS;
 856         }
 857         da->emulate_rest_reord = flag;
 858         pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
 859                 da->da_dev, flag);
 860         return count;
 861 }
 862
 863 /*
 864  * Note, this can only be called on unexported SE Device Object.
 865  */
 866 static ssize_t store_queue_depth(struct se_dev_attrib *da,
 867                 const char *page, size_t count)
 868 {
 869         struct se_device *dev = da->da_dev;
 870         u32 val;
 871         int ret;
 872
 873         ret = kstrtou32(page, 0, &val);
 874         if (ret < 0)
 875                 return ret;
 876
 877         if (dev->export_count) {
 878                 pr_err("dev[%p]: Unable to change SE Device TCQ while"
 879                         " export_count is %d\n",
 880                         dev, dev->export_count);
 881                 return -EINVAL;
 882         }
 883         if (!val) {
 884                 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
 885                 return -EINVAL;
 886         }
 887
 888         if (val > dev->dev_attrib.queue_depth) {
 889                 if (val > dev->dev_attrib.hw_queue_depth) {
 890                         pr_err("dev[%p]: Passed queue_depth:"
 891                                 " %u exceeds TCM/SE_Device MAX"
 892                                 " TCQ: %u\n", dev, val,
 893                                 dev->dev_attrib.hw_queue_depth);
 894                         return -EINVAL;
 895                 }
 896         }
 897         da->queue_depth = dev->queue_depth = val;
 898         pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val);
 899         return count;
 900 }
 901
 902 static ssize_t store_optimal_sectors(struct se_dev_attrib *da,
 903                 const char *page, size_t count)
 904 {
 905         u32 val;
 906         int ret;
 907
 908         ret = kstrtou32(page, 0, &val);
 909         if (ret < 0)
 910                 return ret;
 911
 912         if (da->da_dev->export_count) {
 913                 pr_err("dev[%p]: Unable to change SE Device"
 914                         " optimal_sectors while export_count is %d\n",
 915                         da->da_dev, da->da_dev->export_count);
 916                 return -EINVAL;
 917         }
 918         if (val > da->hw_max_sectors) {
 919                 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
 920                         " greater than hw_max_sectors: %u\n",
 921                         da->da_dev, val, da->hw_max_sectors);
 922                 return -EINVAL;
 923         }
 924
 925         da->optimal_sectors = val;
 926         pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
 927                         da->da_dev, val);
 928         return count;
 929 }
 930
 931 static ssize_t store_block_size(struct se_dev_attrib *da,
 932                 const char *page, size_t count)
 933 {
 934         u32 val;
 935         int ret;
 936
 937         ret = kstrtou32(page, 0, &val);
 938         if (ret < 0)
 939                 return ret;
 940
 941         if (da->da_dev->export_count) {
 942                 pr_err("dev[%p]: Unable to change SE Device block_size"
 943                         " while export_count is %d\n",
 944                         da->da_dev, da->da_dev->export_count);
 945                 return -EINVAL;
 946         }
 947
 948         if (val != 512 && val != 1024 && val != 2048 && val != 4096) {
 949                 pr_err("dev[%p]: Illegal value for block_device: %u"
 950                         " for SE device, must be 512, 1024, 2048 or 4096\n",
 951                         da->da_dev, val);
 952                 return -EINVAL;
 953         }
 954
 955         da->block_size = val;
 956         if (da->max_bytes_per_io)
 957                 da->hw_max_sectors = da->max_bytes_per_io / val;
 958
 959         pr_debug("dev[%p]: SE Device block_size changed to %u\n",
 960                         da->da_dev, val);
 961         return count;
 962 }
 963
 964 CONFIGFS_EATTR_STRUCT(target_backend_dev_attrib, se_dev_attrib);
 965 #define TB_DEV_ATTR(_backend, _name, _mode)                             \
 966 static struct target_backend_dev_attrib_attribute _backend##_dev_attrib_##_name = \
 967         __CONFIGFS_EATTR(_name, _mode,                                  \
 968         show_##_name,                                                   \
 969         store_##_name);
 970
 971 #define TB_DEV_ATTR_RO(_backend, _name)                                 \
 972 static struct target_backend_dev_attrib_attribute _backend##_dev_attrib_##_name = \
 973         __CONFIGFS_EATTR_RO(_name,                                      \
 974         show_##_name);
 975
 976 TB_DEV_ATTR(target_core, emulate_model_alias, S_IRUGO | S_IWUSR);
 977 TB_DEV_ATTR(target_core, emulate_dpo, S_IRUGO | S_IWUSR);
 978 TB_DEV_ATTR(target_core, emulate_fua_write, S_IRUGO | S_IWUSR);
 979 TB_DEV_ATTR(target_core, emulate_fua_read, S_IRUGO | S_IWUSR);
 980 TB_DEV_ATTR(target_core, emulate_write_cache, S_IRUGO | S_IWUSR);
 981 TB_DEV_ATTR(target_core, emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
 982 TB_DEV_ATTR(target_core, emulate_tas, S_IRUGO | S_IWUSR);
 983 TB_DEV_ATTR(target_core, emulate_tpu, S_IRUGO | S_IWUSR);
 984 TB_DEV_ATTR(target_core, emulate_tpws, S_IRUGO | S_IWUSR);
 985 TB_DEV_ATTR(target_core, emulate_caw, S_IRUGO | S_IWUSR);
 986 TB_DEV_ATTR(target_core, emulate_3pc, S_IRUGO | S_IWUSR);
 987 TB_DEV_ATTR(target_core, pi_prot_type, S_IRUGO | S_IWUSR);
 988 TB_DEV_ATTR_RO(target_core, hw_pi_prot_type);
 989 TB_DEV_ATTR(target_core, pi_prot_format, S_IRUGO | S_IWUSR);
 990 TB_DEV_ATTR(target_core, enforce_pr_isids, S_IRUGO | S_IWUSR);
 991 TB_DEV_ATTR(target_core, is_nonrot, S_IRUGO | S_IWUSR);
 992 TB_DEV_ATTR(target_core, emulate_rest_reord, S_IRUGO | S_IWUSR);
 993 TB_DEV_ATTR(target_core, force_pr_aptpl, S_IRUGO | S_IWUSR)
 994 TB_DEV_ATTR_RO(target_core, hw_block_size);
 995 TB_DEV_ATTR(target_core, block_size, S_IRUGO | S_IWUSR)
 996 TB_DEV_ATTR_RO(target_core, hw_max_sectors);
 997 TB_DEV_ATTR(target_core, optimal_sectors, S_IRUGO | S_IWUSR);
 998 TB_DEV_ATTR_RO(target_core, hw_queue_depth);
 999 TB_DEV_ATTR(target_core, queue_depth, S_IRUGO | S_IWUSR);
1000 TB_DEV_ATTR(target_core, max_unmap_lba_count, S_IRUGO | S_IWUSR);
1001 TB_DEV_ATTR(target_core, max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
1002 TB_DEV_ATTR(target_core, unmap_granularity, S_IRUGO | S_IWUSR);
1003 TB_DEV_ATTR(target_core, unmap_granularity_alignment, S_IRUGO | S_IWUSR);
1004 TB_DEV_ATTR(target_core, max_write_same_len, S_IRUGO | S_IWUSR);
1005
1006 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
1007 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
1008
1009 /*
1010  * dev_attrib attributes for devices using the target core SBC/SPC
1011  * interpreter.  Any backend using spc_parse_cdb should be using
1012  * these.
1013  */
1014 struct configfs_attribute *sbc_attrib_attrs[] = {
1015         &target_core_dev_attrib_emulate_model_alias.attr,
1016         &target_core_dev_attrib_emulate_dpo.attr,
1017         &target_core_dev_attrib_emulate_fua_write.attr,
1018         &target_core_dev_attrib_emulate_fua_read.attr,
1019         &target_core_dev_attrib_emulate_write_cache.attr,
1020         &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
1021         &target_core_dev_attrib_emulate_tas.attr,
1022         &target_core_dev_attrib_emulate_tpu.attr,
1023         &target_core_dev_attrib_emulate_tpws.attr,
1024         &target_core_dev_attrib_emulate_caw.attr,
1025         &target_core_dev_attrib_emulate_3pc.attr,
1026         &target_core_dev_attrib_pi_prot_type.attr,
1027         &target_core_dev_attrib_hw_pi_prot_type.attr,
1028         &target_core_dev_attrib_pi_prot_format.attr,
1029         &target_core_dev_attrib_enforce_pr_isids.attr,
1030         &target_core_dev_attrib_is_nonrot.attr,
1031         &target_core_dev_attrib_emulate_rest_reord.attr,
1032         &target_core_dev_attrib_force_pr_aptpl.attr,
1033         &target_core_dev_attrib_hw_block_size.attr,
1034         &target_core_dev_attrib_block_size.attr,
1035         &target_core_dev_attrib_hw_max_sectors.attr,
1036         &target_core_dev_attrib_optimal_sectors.attr,
1037         &target_core_dev_attrib_hw_queue_depth.attr,
1038         &target_core_dev_attrib_queue_depth.attr,
1039         &target_core_dev_attrib_max_unmap_lba_count.attr,
1040         &target_core_dev_attrib_max_unmap_block_desc_count.attr,
1041         &target_core_dev_attrib_unmap_granularity.attr,
1042         &target_core_dev_attrib_unmap_granularity_alignment.attr,
1043         &target_core_dev_attrib_max_write_same_len.attr,
1044         NULL,
1045 };
1046 EXPORT_SYMBOL(sbc_attrib_attrs);
1047
1048 TB_DEV_ATTR_RO(target_pt, hw_pi_prot_type);
1049 TB_DEV_ATTR_RO(target_pt, hw_block_size);
1050 TB_DEV_ATTR_RO(target_pt, hw_max_sectors);
1051 TB_DEV_ATTR_RO(target_pt, hw_queue_depth);
1052
1053 /*
1054  * Minimal dev_attrib attributes for devices passing through CDBs.
1055  * In this case we only provide a few read-only attributes for
1056  * backwards compatibility.
1057  */
1058 struct configfs_attribute *passthrough_attrib_attrs[] = {
1059         &target_pt_dev_attrib_hw_pi_prot_type.attr,
1060         &target_pt_dev_attrib_hw_block_size.attr,
1061         &target_pt_dev_attrib_hw_max_sectors.attr,
1062         &target_pt_dev_attrib_hw_queue_depth.attr,
1063         NULL,
1064 };
1065 EXPORT_SYMBOL(passthrough_attrib_attrs);
1066
1067 static struct configfs_item_operations target_core_dev_attrib_ops = {
1068         .show_attribute         = target_core_dev_attrib_attr_show,
1069         .store_attribute        = target_core_dev_attrib_attr_store,
1070 };
1071
1072 TB_CIT_SETUP_DRV(dev_attrib, &target_core_dev_attrib_ops, NULL);
1073
1074 /* End functions for struct config_item_type tb_dev_attrib_cit */
1075
1076 /*  Start functions for struct config_item_type tb_dev_wwn_cit */
1077
1078 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
1079 #define SE_DEV_WWN_ATTR(_name, _mode)                                   \
1080 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
1081                 __CONFIGFS_EATTR(_name, _mode,                          \
1082                 target_core_dev_wwn_show_attr_##_name,                  \
1083                 target_core_dev_wwn_store_attr_##_name);
1084
1085 #define SE_DEV_WWN_ATTR_RO(_name);                                      \
1086 do {                                                                    \
1087         static struct target_core_dev_wwn_attribute                     \
1088                         target_core_dev_wwn_##_name =                   \
1089                 __CONFIGFS_EATTR_RO(_name,                              \
1090                 target_core_dev_wwn_show_attr_##_name);                 \
1091 } while (0);
1092
1093 /*
1094  * VPD page 0x80 Unit serial
1095  */
1096 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
1097         struct t10_wwn *t10_wwn,
1098         char *page)
1099 {
1100         return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1101                 &t10_wwn->unit_serial[0]);
1102 }
1103
1104 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
1105         struct t10_wwn *t10_wwn,
1106         const char *page,
1107         size_t count)
1108 {
1109         struct se_device *dev = t10_wwn->t10_dev;
1110         unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
1111
1112         /*
1113          * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1114          * from the struct scsi_device level firmware, do not allow
1115          * VPD Unit Serial to be emulated.
1116          *
1117          * Note this struct scsi_device could also be emulating VPD
1118          * information from its drivers/scsi LLD.  But for now we assume
1119          * it is doing 'the right thing' wrt a world wide unique
1120          * VPD Unit Serial Number that OS dependent multipath can depend on.
1121          */
1122         if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
1123                 pr_err("Underlying SCSI device firmware provided VPD"
1124                         " Unit Serial, ignoring request\n");
1125                 return -EOPNOTSUPP;
1126         }
1127
1128         if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
1129                 pr_err("Emulated VPD Unit Serial exceeds"
1130                 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1131                 return -EOVERFLOW;
1132         }
1133         /*
1134          * Check to see if any active $FABRIC_MOD exports exist.  If they
1135          * do exist, fail here as changing this information on the fly
1136          * (underneath the initiator side OS dependent multipath code)
1137          * could cause negative effects.
1138          */
1139         if (dev->export_count) {
1140                 pr_err("Unable to set VPD Unit Serial while"
1141                         " active %d $FABRIC_MOD exports exist\n",
1142                         dev->export_count);
1143                 return -EINVAL;
1144         }
1145
1146         /*
1147          * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1148          *
1149          * Also, strip any newline added from the userspace
1150          * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1151          */
1152         memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
1153         snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
1154         snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
1155                         "%s", strstrip(buf));
1156         dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
1157
1158         pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1159                         " %s\n", dev->t10_wwn.unit_serial);
1160
1161         return count;
1162 }
1163
1164 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
1165
1166 /*
1167  * VPD page 0x83 Protocol Identifier
1168  */
1169 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
1170         struct t10_wwn *t10_wwn,
1171         char *page)
1172 {
1173         struct t10_vpd *vpd;
1174         unsigned char buf[VPD_TMP_BUF_SIZE];
1175         ssize_t len = 0;
1176
1177         memset(buf, 0, VPD_TMP_BUF_SIZE);
1178
1179         spin_lock(&t10_wwn->t10_vpd_lock);
1180         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
1181                 if (!vpd->protocol_identifier_set)
1182                         continue;
1183
1184                 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1185
1186                 if (len + strlen(buf) >= PAGE_SIZE)
1187                         break;
1188
1189                 len += sprintf(page+len, "%s", buf);
1190         }
1191         spin_unlock(&t10_wwn->t10_vpd_lock);
1192
1193         return len;
1194 }
1195
1196 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
1197         struct t10_wwn *t10_wwn,
1198         const char *page,
1199         size_t count)
1200 {
1201         return -ENOSYS;
1202 }
1203
1204 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
1205
1206 /*
1207  * Generic wrapper for dumping VPD identifiers by association.
1208  */
1209 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc)                           \
1210 static ssize_t target_core_dev_wwn_show_attr_##_name(                   \
1211         struct t10_wwn *t10_wwn,                                        \
1212         char *page)                                                     \
1213 {                                                                       \
1214         struct t10_vpd *vpd;                                                    \
1215         unsigned char buf[VPD_TMP_BUF_SIZE];                            \
1216         ssize_t len = 0;                                                \
1217                                                                         \
1218         spin_lock(&t10_wwn->t10_vpd_lock);                              \
1219         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {    \
1220                 if (vpd->association != _assoc)                         \
1221                         continue;                                       \
1222                                                                         \
1223                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
1224                 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE);   \
1225                 if (len + strlen(buf) >= PAGE_SIZE)                     \
1226                         break;                                          \
1227                 len += sprintf(page+len, "%s", buf);                    \
1228                                                                         \
1229                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
1230                 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1231                 if (len + strlen(buf) >= PAGE_SIZE)                     \
1232                         break;                                          \
1233                 len += sprintf(page+len, "%s", buf);                    \
1234                                                                         \
1235                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
1236                 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1237                 if (len + strlen(buf) >= PAGE_SIZE)                     \
1238                         break;                                          \
1239                 len += sprintf(page+len, "%s", buf);                    \
1240         }                                                               \
1241         spin_unlock(&t10_wwn->t10_vpd_lock);                            \
1242                                                                         \
1243         return len;                                                     \
1244 }
1245
1246 /*
1247  * VPD page 0x83 Association: Logical Unit
1248  */
1249 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1250
1251 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
1252         struct t10_wwn *t10_wwn,
1253         const char *page,
1254         size_t count)
1255 {
1256         return -ENOSYS;
1257 }
1258
1259 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
1260
1261 /*
1262  * VPD page 0x83 Association: Target Port
1263  */
1264 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1265
1266 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
1267         struct t10_wwn *t10_wwn,
1268         const char *page,
1269         size_t count)
1270 {
1271         return -ENOSYS;
1272 }
1273
1274 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
1275
1276 /*
1277  * VPD page 0x83 Association: SCSI Target Device
1278  */
1279 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1280
1281 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
1282         struct t10_wwn *t10_wwn,
1283         const char *page,
1284         size_t count)
1285 {
1286         return -ENOSYS;
1287 }
1288
1289 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
1290
1291 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
1292
1293 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1294         &target_core_dev_wwn_vpd_unit_serial.attr,
1295         &target_core_dev_wwn_vpd_protocol_identifier.attr,
1296         &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
1297         &target_core_dev_wwn_vpd_assoc_target_port.attr,
1298         &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
1299         NULL,
1300 };
1301
1302 static struct configfs_item_operations target_core_dev_wwn_ops = {
1303         .show_attribute         = target_core_dev_wwn_attr_show,
1304         .store_attribute        = target_core_dev_wwn_attr_store,
1305 };
1306
1307 TB_CIT_SETUP(dev_wwn, &target_core_dev_wwn_ops, NULL, target_core_dev_wwn_attrs);
1308
1309 /*  End functions for struct config_item_type tb_dev_wwn_cit */
1310
1311 /*  Start functions for struct config_item_type tb_dev_pr_cit */
1312
1313 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
1314 #define SE_DEV_PR_ATTR(_name, _mode)                                    \
1315 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1316         __CONFIGFS_EATTR(_name, _mode,                                  \
1317         target_core_dev_pr_show_attr_##_name,                           \
1318         target_core_dev_pr_store_attr_##_name);
1319
1320 #define SE_DEV_PR_ATTR_RO(_name);                                       \
1321 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1322         __CONFIGFS_EATTR_RO(_name,                                      \
1323         target_core_dev_pr_show_attr_##_name);
1324
1325 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1326                 char *page)
1327 {
1328         struct se_node_acl *se_nacl;
1329         struct t10_pr_registration *pr_reg;
1330         char i_buf[PR_REG_ISID_ID_LEN];
1331
1332         memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1333
1334         pr_reg = dev->dev_pr_res_holder;
1335         if (!pr_reg)
1336                 return sprintf(page, "No SPC-3 Reservation holder\n");
1337
1338         se_nacl = pr_reg->pr_reg_nacl;
1339         core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1340
1341         return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1342                 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1343                 se_nacl->initiatorname, i_buf);
1344 }
1345
1346 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1347                 char *page)
1348 {
1349         struct se_node_acl *se_nacl;
1350         ssize_t len;
1351
1352         se_nacl = dev->dev_reserved_node_acl;
1353         if (se_nacl) {
1354                 len = sprintf(page,
1355                               "SPC-2 Reservation: %s Initiator: %s\n",
1356                               se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1357                               se_nacl->initiatorname);
1358         } else {
1359                 len = sprintf(page, "No SPC-2 Reservation holder\n");
1360         }
1361         return len;
1362 }
1363
1364 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
1365                 char *page)
1366 {
1367         int ret;
1368
1369         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1370                 return sprintf(page, "Passthrough\n");
1371
1372         spin_lock(&dev->dev_reservation_lock);
1373         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1374                 ret = target_core_dev_pr_show_spc2_res(dev, page);
1375         else
1376                 ret = target_core_dev_pr_show_spc3_res(dev, page);
1377         spin_unlock(&dev->dev_reservation_lock);
1378         return ret;
1379 }
1380
1381 SE_DEV_PR_ATTR_RO(res_holder);
1382
1383 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1384                 struct se_device *dev, char *page)
1385 {
1386         ssize_t len = 0;
1387
1388         spin_lock(&dev->dev_reservation_lock);
1389         if (!dev->dev_pr_res_holder) {
1390                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1391         } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1392                 len = sprintf(page, "SPC-3 Reservation: All Target"
1393                         " Ports registration\n");
1394         } else {
1395                 len = sprintf(page, "SPC-3 Reservation: Single"
1396                         " Target Port registration\n");
1397         }
1398
1399         spin_unlock(&dev->dev_reservation_lock);
1400         return len;
1401 }
1402
1403 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1404
1405 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1406                 struct se_device *dev, char *page)
1407 {
1408         return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
1409 }
1410
1411 SE_DEV_PR_ATTR_RO(res_pr_generation);
1412
1413 /*
1414  * res_pr_holder_tg_port
1415  */
1416 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1417                 struct se_device *dev, char *page)
1418 {
1419         struct se_node_acl *se_nacl;
1420         struct se_portal_group *se_tpg;
1421         struct t10_pr_registration *pr_reg;
1422         const struct target_core_fabric_ops *tfo;
1423         ssize_t len = 0;
1424
1425         spin_lock(&dev->dev_reservation_lock);
1426         pr_reg = dev->dev_pr_res_holder;
1427         if (!pr_reg) {
1428                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1429                 goto out_unlock;
1430         }
1431
1432         se_nacl = pr_reg->pr_reg_nacl;
1433         se_tpg = se_nacl->se_tpg;
1434         tfo = se_tpg->se_tpg_tfo;
1435
1436         len += sprintf(page+len, "SPC-3 Reservation: %s"
1437                 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1438                 tfo->tpg_get_wwn(se_tpg));
1439         len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1440                 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1441                 " %s Logical Unit: %u\n", pr_reg->tg_pt_sep_rtpi,
1442                 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1443                 tfo->get_fabric_name(), pr_reg->pr_aptpl_target_lun);
1444
1445 out_unlock:
1446         spin_unlock(&dev->dev_reservation_lock);
1447         return len;
1448 }
1449
1450 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1451
1452 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1453                 struct se_device *dev, char *page)
1454 {
1455         const struct target_core_fabric_ops *tfo;
1456         struct t10_pr_registration *pr_reg;
1457         unsigned char buf[384];
1458         char i_buf[PR_REG_ISID_ID_LEN];
1459         ssize_t len = 0;
1460         int reg_count = 0;
1461
1462         len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1463
1464         spin_lock(&dev->t10_pr.registration_lock);
1465         list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1466                         pr_reg_list) {
1467
1468                 memset(buf, 0, 384);
1469                 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1470                 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1471                 core_pr_dump_initiator_port(pr_reg, i_buf,
1472                                         PR_REG_ISID_ID_LEN);
1473                 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1474                         tfo->get_fabric_name(),
1475                         pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1476                         pr_reg->pr_res_generation);
1477
1478                 if (len + strlen(buf) >= PAGE_SIZE)
1479                         break;
1480
1481                 len += sprintf(page+len, "%s", buf);
1482                 reg_count++;
1483         }
1484         spin_unlock(&dev->t10_pr.registration_lock);
1485
1486         if (!reg_count)
1487                 len += sprintf(page+len, "None\n");
1488
1489         return len;
1490 }
1491
1492 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1493
1494 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1495                 struct se_device *dev, char *page)
1496 {
1497         struct t10_pr_registration *pr_reg;
1498         ssize_t len = 0;
1499
1500         spin_lock(&dev->dev_reservation_lock);
1501         pr_reg = dev->dev_pr_res_holder;
1502         if (pr_reg) {
1503                 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1504                         core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1505         } else {
1506                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1507         }
1508
1509         spin_unlock(&dev->dev_reservation_lock);
1510         return len;
1511 }
1512
1513 SE_DEV_PR_ATTR_RO(res_pr_type);
1514
1515 static ssize_t target_core_dev_pr_show_attr_res_type(
1516                 struct se_device *dev, char *page)
1517 {
1518         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1519                 return sprintf(page, "SPC_PASSTHROUGH\n");
1520         else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1521                 return sprintf(page, "SPC2_RESERVATIONS\n");
1522         else
1523                 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1524 }
1525
1526 SE_DEV_PR_ATTR_RO(res_type);
1527
1528 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1529                 struct se_device *dev, char *page)
1530 {
1531         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1532                 return 0;
1533
1534         return sprintf(page, "APTPL Bit Status: %s\n",
1535                 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1536 }
1537
1538 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1539
1540 /*
1541  * res_aptpl_metadata
1542  */
1543 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1544                 struct se_device *dev, char *page)
1545 {
1546         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1547                 return 0;
1548
1549         return sprintf(page, "Ready to process PR APTPL metadata..\n");
1550 }
1551
1552 enum {
1553         Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1554         Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1555         Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1556         Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1557 };
1558
1559 static match_table_t tokens = {
1560         {Opt_initiator_fabric, "initiator_fabric=%s"},
1561         {Opt_initiator_node, "initiator_node=%s"},
1562         {Opt_initiator_sid, "initiator_sid=%s"},
1563         {Opt_sa_res_key, "sa_res_key=%s"},
1564         {Opt_res_holder, "res_holder=%d"},
1565         {Opt_res_type, "res_type=%d"},
1566         {Opt_res_scope, "res_scope=%d"},
1567         {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1568         {Opt_mapped_lun, "mapped_lun=%d"},
1569         {Opt_target_fabric, "target_fabric=%s"},
1570         {Opt_target_node, "target_node=%s"},
1571         {Opt_tpgt, "tpgt=%d"},
1572         {Opt_port_rtpi, "port_rtpi=%d"},
1573         {Opt_target_lun, "target_lun=%d"},
1574         {Opt_err, NULL}
1575 };
1576
1577 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1578         struct se_device *dev,
1579         const char *page,
1580         size_t count)
1581 {
1582         unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1583         unsigned char *t_fabric = NULL, *t_port = NULL;
1584         char *orig, *ptr, *opts;
1585         substring_t args[MAX_OPT_ARGS];
1586         unsigned long long tmp_ll;
1587         u64 sa_res_key = 0;
1588         u32 mapped_lun = 0, target_lun = 0;
1589         int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1590         u16 tpgt = 0;
1591         u8 type = 0;
1592
1593         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1594                 return 0;
1595         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1596                 return 0;
1597
1598         if (dev->export_count) {
1599                 pr_debug("Unable to process APTPL metadata while"
1600                         " active fabric exports exist\n");
1601                 return -EINVAL;
1602         }
1603
1604         opts = kstrdup(page, GFP_KERNEL);
1605         if (!opts)
1606                 return -ENOMEM;
1607
1608         orig = opts;
1609         while ((ptr = strsep(&opts, ",\n")) != NULL) {
1610                 if (!*ptr)
1611                         continue;
1612
1613                 token = match_token(ptr, tokens, args);
1614                 switch (token) {
1615                 case Opt_initiator_fabric:
1616                         i_fabric = match_strdup(args);
1617                         if (!i_fabric) {
1618                                 ret = -ENOMEM;
1619                                 goto out;
1620                         }
1621                         break;
1622                 case Opt_initiator_node:
1623                         i_port = match_strdup(args);
1624                         if (!i_port) {
1625                                 ret = -ENOMEM;
1626                                 goto out;
1627                         }
1628                         if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1629                                 pr_err("APTPL metadata initiator_node="
1630                                         " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1631                                         PR_APTPL_MAX_IPORT_LEN);
1632                                 ret = -EINVAL;
1633                                 break;
1634                         }
1635                         break;
1636                 case Opt_initiator_sid:
1637                         isid = match_strdup(args);
1638                         if (!isid) {
1639                                 ret = -ENOMEM;
1640                                 goto out;
1641                         }
1642                         if (strlen(isid) >= PR_REG_ISID_LEN) {
1643                                 pr_err("APTPL metadata initiator_isid"
1644                                         "= exceeds PR_REG_ISID_LEN: %d\n",
1645                                         PR_REG_ISID_LEN);
1646                                 ret = -EINVAL;
1647                                 break;
1648                         }
1649                         break;
1650                 case Opt_sa_res_key:
1651                         ret = kstrtoull(args->from, 0, &tmp_ll);
1652                         if (ret < 0) {
1653                                 pr_err("kstrtoull() failed for sa_res_key=\n");
1654                                 goto out;
1655                         }
1656                         sa_res_key = (u64)tmp_ll;
1657                         break;
1658                 /*
1659                  * PR APTPL Metadata for Reservation
1660                  */
1661                 case Opt_res_holder:
1662                         match_int(args, &arg);
1663                         res_holder = arg;
1664                         break;
1665                 case Opt_res_type:
1666                         match_int(args, &arg);
1667                         type = (u8)arg;
1668                         break;
1669                 case Opt_res_scope:
1670                         match_int(args, &arg);
1671                         break;
1672                 case Opt_res_all_tg_pt:
1673                         match_int(args, &arg);
1674                         all_tg_pt = (int)arg;
1675                         break;
1676                 case Opt_mapped_lun:
1677                         match_int(args, &arg);
1678                         mapped_lun = (u32)arg;
1679                         break;
1680                 /*
1681                  * PR APTPL Metadata for Target Port
1682                  */
1683                 case Opt_target_fabric:
1684                         t_fabric = match_strdup(args);
1685                         if (!t_fabric) {
1686                                 ret = -ENOMEM;
1687                                 goto out;
1688                         }
1689                         break;
1690                 case Opt_target_node:
1691                         t_port = match_strdup(args);
1692                         if (!t_port) {
1693                                 ret = -ENOMEM;
1694                                 goto out;
1695                         }
1696                         if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1697                                 pr_err("APTPL metadata target_node="
1698                                         " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1699                                         PR_APTPL_MAX_TPORT_LEN);
1700                                 ret = -EINVAL;
1701                                 break;
1702                         }
1703                         break;
1704                 case Opt_tpgt:
1705                         match_int(args, &arg);
1706                         tpgt = (u16)arg;
1707                         break;
1708                 case Opt_port_rtpi:
1709                         match_int(args, &arg);
1710                         break;
1711                 case Opt_target_lun:
1712                         match_int(args, &arg);
1713                         target_lun = (u32)arg;
1714                         break;
1715                 default:
1716                         break;
1717                 }
1718         }
1719
1720         if (!i_port || !t_port || !sa_res_key) {
1721                 pr_err("Illegal parameters for APTPL registration\n");
1722                 ret = -EINVAL;
1723                 goto out;
1724         }
1725
1726         if (res_holder && !(type)) {
1727                 pr_err("Illegal PR type: 0x%02x for reservation"
1728                                 " holder\n", type);
1729                 ret = -EINVAL;
1730                 goto out;
1731         }
1732
1733         ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1734                         i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1735                         res_holder, all_tg_pt, type);
1736 out:
1737         kfree(i_fabric);
1738         kfree(i_port);
1739         kfree(isid);
1740         kfree(t_fabric);
1741         kfree(t_port);
1742         kfree(orig);
1743         return (ret == 0) ? count : ret;
1744 }
1745
1746 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1747
1748 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
1749
1750 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1751         &target_core_dev_pr_res_holder.attr,
1752         &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1753         &target_core_dev_pr_res_pr_generation.attr,
1754         &target_core_dev_pr_res_pr_holder_tg_port.attr,
1755         &target_core_dev_pr_res_pr_registered_i_pts.attr,
1756         &target_core_dev_pr_res_pr_type.attr,
1757         &target_core_dev_pr_res_type.attr,
1758         &target_core_dev_pr_res_aptpl_active.attr,
1759         &target_core_dev_pr_res_aptpl_metadata.attr,
1760         NULL,
1761 };
1762
1763 static struct configfs_item_operations target_core_dev_pr_ops = {
1764         .show_attribute         = target_core_dev_pr_attr_show,
1765         .store_attribute        = target_core_dev_pr_attr_store,
1766 };
1767
1768 TB_CIT_SETUP(dev_pr, &target_core_dev_pr_ops, NULL, target_core_dev_pr_attrs);
1769
1770 /*  End functions for struct config_item_type tb_dev_pr_cit */
1771
1772 /*  Start functions for struct config_item_type tb_dev_cit */
1773
1774 static ssize_t target_core_show_dev_info(void *p, char *page)
1775 {
1776         struct se_device *dev = p;
1777         int bl = 0;
1778         ssize_t read_bytes = 0;
1779
1780         transport_dump_dev_state(dev, page, &bl);
1781         read_bytes += bl;
1782         read_bytes += dev->transport->show_configfs_dev_params(dev,
1783                         page+read_bytes);
1784         return read_bytes;
1785 }
1786
1787 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1788         .attr   = { .ca_owner = THIS_MODULE,
1789                     .ca_name = "info",
1790                     .ca_mode = S_IRUGO },
1791         .show   = target_core_show_dev_info,
1792         .store  = NULL,
1793 };
1794
1795 static ssize_t target_core_store_dev_control(
1796         void *p,
1797         const char *page,
1798         size_t count)
1799 {
1800         struct se_device *dev = p;
1801
1802         return dev->transport->set_configfs_dev_params(dev, page, count);
1803 }
1804
1805 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1806         .attr   = { .ca_owner = THIS_MODULE,
1807                     .ca_name = "control",
1808                     .ca_mode = S_IWUSR },
1809         .show   = NULL,
1810         .store  = target_core_store_dev_control,
1811 };
1812
1813 static ssize_t target_core_show_dev_alias(void *p, char *page)
1814 {
1815         struct se_device *dev = p;
1816
1817         if (!(dev->dev_flags & DF_USING_ALIAS))
1818                 return 0;
1819
1820         return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1821 }
1822
1823 static ssize_t target_core_store_dev_alias(
1824         void *p,
1825         const char *page,
1826         size_t count)
1827 {
1828         struct se_device *dev = p;
1829         struct se_hba *hba = dev->se_hba;
1830         ssize_t read_bytes;
1831
1832         if (count > (SE_DEV_ALIAS_LEN-1)) {
1833                 pr_err("alias count: %d exceeds"
1834                         " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1835                         SE_DEV_ALIAS_LEN-1);
1836                 return -EINVAL;
1837         }
1838
1839         read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1840         if (!read_bytes)
1841                 return -EINVAL;
1842         if (dev->dev_alias[read_bytes - 1] == '\n')
1843                 dev->dev_alias[read_bytes - 1] = '\0';
1844
1845         dev->dev_flags |= DF_USING_ALIAS;
1846
1847         pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1848                 config_item_name(&hba->hba_group.cg_item),
1849                 config_item_name(&dev->dev_group.cg_item),
1850                 dev->dev_alias);
1851
1852         return read_bytes;
1853 }
1854
1855 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1856         .attr   = { .ca_owner = THIS_MODULE,
1857                     .ca_name = "alias",
1858                     .ca_mode =  S_IRUGO | S_IWUSR },
1859         .show   = target_core_show_dev_alias,
1860         .store  = target_core_store_dev_alias,
1861 };
1862
1863 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1864 {
1865         struct se_device *dev = p;
1866
1867         if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1868                 return 0;
1869
1870         return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1871 }
1872
1873 static ssize_t target_core_store_dev_udev_path(
1874         void *p,
1875         const char *page,
1876         size_t count)
1877 {
1878         struct se_device *dev = p;
1879         struct se_hba *hba = dev->se_hba;
1880         ssize_t read_bytes;
1881
1882         if (count > (SE_UDEV_PATH_LEN-1)) {
1883                 pr_err("udev_path count: %d exceeds"
1884                         " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1885                         SE_UDEV_PATH_LEN-1);
1886                 return -EINVAL;
1887         }
1888
1889         read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1890                         "%s", page);
1891         if (!read_bytes)
1892                 return -EINVAL;
1893         if (dev->udev_path[read_bytes - 1] == '\n')
1894                 dev->udev_path[read_bytes - 1] = '\0';
1895
1896         dev->dev_flags |= DF_USING_UDEV_PATH;
1897
1898         pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1899                 config_item_name(&hba->hba_group.cg_item),
1900                 config_item_name(&dev->dev_group.cg_item),
1901                 dev->udev_path);
1902
1903         return read_bytes;
1904 }
1905
1906 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1907         .attr   = { .ca_owner = THIS_MODULE,
1908                     .ca_name = "udev_path",
1909                     .ca_mode =  S_IRUGO | S_IWUSR },
1910         .show   = target_core_show_dev_udev_path,
1911         .store  = target_core_store_dev_udev_path,
1912 };
1913
1914 static ssize_t target_core_show_dev_enable(void *p, char *page)
1915 {
1916         struct se_device *dev = p;
1917
1918         return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1919 }
1920
1921 static ssize_t target_core_store_dev_enable(
1922         void *p,
1923         const char *page,
1924         size_t count)
1925 {
1926         struct se_device *dev = p;
1927         char *ptr;
1928         int ret;
1929
1930         ptr = strstr(page, "1");
1931         if (!ptr) {
1932                 pr_err("For dev_enable ops, only valid value"
1933                                 " is \"1\"\n");
1934                 return -EINVAL;
1935         }
1936
1937         ret = target_configure_device(dev);
1938         if (ret)
1939                 return ret;
1940         return count;
1941 }
1942
1943 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1944         .attr   = { .ca_owner = THIS_MODULE,
1945                     .ca_name = "enable",
1946                     .ca_mode =  S_IRUGO | S_IWUSR },
1947         .show   = target_core_show_dev_enable,
1948         .store  = target_core_store_dev_enable,
1949 };
1950
1951 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1952 {
1953         struct se_device *dev = p;
1954         struct config_item *lu_ci;
1955         struct t10_alua_lu_gp *lu_gp;
1956         struct t10_alua_lu_gp_member *lu_gp_mem;
1957         ssize_t len = 0;
1958
1959         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1960         if (!lu_gp_mem)
1961                 return 0;
1962
1963         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1964         lu_gp = lu_gp_mem->lu_gp;
1965         if (lu_gp) {
1966                 lu_ci = &lu_gp->lu_gp_group.cg_item;
1967                 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1968                         config_item_name(lu_ci), lu_gp->lu_gp_id);
1969         }
1970         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1971
1972         return len;
1973 }
1974
1975 static ssize_t target_core_store_alua_lu_gp(
1976         void *p,
1977         const char *page,
1978         size_t count)
1979 {
1980         struct se_device *dev = p;
1981         struct se_hba *hba = dev->se_hba;
1982         struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1983         struct t10_alua_lu_gp_member *lu_gp_mem;
1984         unsigned char buf[LU_GROUP_NAME_BUF];
1985         int move = 0;
1986
1987         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1988         if (!lu_gp_mem)
1989                 return 0;
1990
1991         if (count > LU_GROUP_NAME_BUF) {
1992                 pr_err("ALUA LU Group Alias too large!\n");
1993                 return -EINVAL;
1994         }
1995         memset(buf, 0, LU_GROUP_NAME_BUF);
1996         memcpy(buf, page, count);
1997         /*
1998          * Any ALUA logical unit alias besides "NULL" means we will be
1999          * making a new group association.
2000          */
2001         if (strcmp(strstrip(buf), "NULL")) {
2002                 /*
2003                  * core_alua_get_lu_gp_by_name() will increment reference to
2004                  * struct t10_alua_lu_gp.  This reference is released with
2005                  * core_alua_get_lu_gp_by_name below().
2006                  */
2007                 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
2008                 if (!lu_gp_new)
2009                         return -ENODEV;
2010         }
2011
2012         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2013         lu_gp = lu_gp_mem->lu_gp;
2014         if (lu_gp) {
2015                 /*
2016                  * Clearing an existing lu_gp association, and replacing
2017                  * with NULL
2018                  */
2019                 if (!lu_gp_new) {
2020                         pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
2021                                 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
2022                                 " %hu\n",
2023                                 config_item_name(&hba->hba_group.cg_item),
2024                                 config_item_name(&dev->dev_group.cg_item),
2025                                 config_item_name(&lu_gp->lu_gp_group.cg_item),
2026                                 lu_gp->lu_gp_id);
2027
2028                         __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2029                         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2030
2031                         return count;
2032                 }
2033                 /*
2034                  * Removing existing association of lu_gp_mem with lu_gp
2035                  */
2036                 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2037                 move = 1;
2038         }
2039         /*
2040          * Associate lu_gp_mem with lu_gp_new.
2041          */
2042         __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
2043         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2044
2045         pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
2046                 " core/alua/lu_gps/%s, ID: %hu\n",
2047                 (move) ? "Moving" : "Adding",
2048                 config_item_name(&hba->hba_group.cg_item),
2049                 config_item_name(&dev->dev_group.cg_item),
2050                 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
2051                 lu_gp_new->lu_gp_id);
2052
2053         core_alua_put_lu_gp_from_name(lu_gp_new);
2054         return count;
2055 }
2056
2057 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
2058         .attr   = { .ca_owner = THIS_MODULE,
2059                     .ca_name = "alua_lu_gp",
2060                     .ca_mode = S_IRUGO | S_IWUSR },
2061         .show   = target_core_show_alua_lu_gp,
2062         .store  = target_core_store_alua_lu_gp,
2063 };
2064
2065 static ssize_t target_core_show_dev_lba_map(void *p, char *page)
2066 {
2067         struct se_device *dev = p;
2068         struct t10_alua_lba_map *map;
2069         struct t10_alua_lba_map_member *mem;
2070         char *b = page;
2071         int bl = 0;
2072         char state;
2073
2074         spin_lock(&dev->t10_alua.lba_map_lock);
2075         if (!list_empty(&dev->t10_alua.lba_map_list))
2076             bl += sprintf(b + bl, "%u %u\n",
2077                           dev->t10_alua.lba_map_segment_size,
2078                           dev->t10_alua.lba_map_segment_multiplier);
2079         list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
2080                 bl += sprintf(b + bl, "%llu %llu",
2081                               map->lba_map_first_lba, map->lba_map_last_lba);
2082                 list_for_each_entry(mem, &map->lba_map_mem_list,
2083                                     lba_map_mem_list) {
2084                         switch (mem->lba_map_mem_alua_state) {
2085                         case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
2086                                 state = 'O';
2087                                 break;
2088                         case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
2089                                 state = 'A';
2090                                 break;
2091                         case ALUA_ACCESS_STATE_STANDBY:
2092                                 state = 'S';
2093                                 break;
2094                         case ALUA_ACCESS_STATE_UNAVAILABLE:
2095                                 state = 'U';
2096                                 break;
2097                         default:
2098                                 state = '.';
2099                                 break;
2100                         }
2101                         bl += sprintf(b + bl, " %d:%c",
2102                                       mem->lba_map_mem_alua_pg_id, state);
2103                 }
2104                 bl += sprintf(b + bl, "\n");
2105         }
2106         spin_unlock(&dev->t10_alua.lba_map_lock);
2107         return bl;
2108 }
2109
2110 static ssize_t target_core_store_dev_lba_map(
2111         void *p,
2112         const char *page,
2113         size_t count)
2114 {
2115         struct se_device *dev = p;
2116         struct t10_alua_lba_map *lba_map = NULL;
2117         struct list_head lba_list;
2118         char *map_entries, *ptr;
2119         char state;
2120         int pg_num = -1, pg;
2121         int ret = 0, num = 0, pg_id, alua_state;
2122         unsigned long start_lba = -1, end_lba = -1;
2123         unsigned long segment_size = -1, segment_mult = -1;
2124
2125         map_entries = kstrdup(page, GFP_KERNEL);
2126         if (!map_entries)
2127                 return -ENOMEM;
2128
2129         INIT_LIST_HEAD(&lba_list);
2130         while ((ptr = strsep(&map_entries, "\n")) != NULL) {
2131                 if (!*ptr)
2132                         continue;
2133
2134                 if (num == 0) {
2135                         if (sscanf(ptr, "%lu %lu\n",
2136                                    &segment_size, &segment_mult) != 2) {
2137                                 pr_err("Invalid line %d\n", num);
2138                                 ret = -EINVAL;
2139                                 break;
2140                         }
2141                         num++;
2142                         continue;
2143                 }
2144                 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2145                         pr_err("Invalid line %d\n", num);
2146                         ret = -EINVAL;
2147                         break;
2148                 }
2149                 ptr = strchr(ptr, ' ');
2150                 if (!ptr) {
2151                         pr_err("Invalid line %d, missing end lba\n", num);
2152                         ret = -EINVAL;
2153                         break;
2154                 }
2155                 ptr++;
2156                 ptr = strchr(ptr, ' ');
2157                 if (!ptr) {
2158                         pr_err("Invalid line %d, missing state definitions\n",
2159                                num);
2160                         ret = -EINVAL;
2161                         break;
2162                 }
2163                 ptr++;
2164                 lba_map = core_alua_allocate_lba_map(&lba_list,
2165                                                      start_lba, end_lba);
2166                 if (IS_ERR(lba_map)) {
2167                         ret = PTR_ERR(lba_map);
2168                         break;
2169                 }
2170                 pg = 0;
2171                 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2172                         switch (state) {
2173                         case 'O':
2174                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2175                                 break;
2176                         case 'A':
2177                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2178                                 break;
2179                         case 'S':
2180                                 alua_state = ALUA_ACCESS_STATE_STANDBY;
2181                                 break;
2182                         case 'U':
2183                                 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2184                                 break;
2185                         default:
2186                                 pr_err("Invalid ALUA state '%c'\n", state);
2187                                 ret = -EINVAL;
2188                                 goto out;
2189                         }
2190
2191                         ret = core_alua_allocate_lba_map_mem(lba_map,
2192                                                              pg_id, alua_state);
2193                         if (ret) {
2194                                 pr_err("Invalid target descriptor %d:%c "
2195                                        "at line %d\n",
2196                                        pg_id, state, num);
2197                                 break;
2198                         }
2199                         pg++;
2200                         ptr = strchr(ptr, ' ');
2201                         if (ptr)
2202                                 ptr++;
2203                         else
2204                                 break;
2205                 }
2206                 if (pg_num == -1)
2207                     pg_num = pg;
2208                 else if (pg != pg_num) {
2209                         pr_err("Only %d from %d port groups definitions "
2210                                "at line %d\n", pg, pg_num, num);
2211                         ret = -EINVAL;
2212                         break;
2213                 }
2214                 num++;
2215         }
2216 out:
2217         if (ret) {
2218                 core_alua_free_lba_map(&lba_list);
2219                 count = ret;
2220         } else
2221                 core_alua_set_lba_map(dev, &lba_list,
2222                                       segment_size, segment_mult);
2223         kfree(map_entries);
2224         return count;
2225 }
2226
2227 static struct target_core_configfs_attribute target_core_attr_dev_lba_map = {
2228         .attr   = { .ca_owner = THIS_MODULE,
2229                     .ca_name = "lba_map",
2230                     .ca_mode = S_IRUGO | S_IWUSR },
2231         .show   = target_core_show_dev_lba_map,
2232         .store  = target_core_store_dev_lba_map,
2233 };
2234
2235 static struct configfs_attribute *target_core_dev_attrs[] = {
2236         &target_core_attr_dev_info.attr,
2237         &target_core_attr_dev_control.attr,
2238         &target_core_attr_dev_alias.attr,
2239         &target_core_attr_dev_udev_path.attr,
2240         &target_core_attr_dev_enable.attr,
2241         &target_core_attr_dev_alua_lu_gp.attr,
2242         &target_core_attr_dev_lba_map.attr,
2243         NULL,
2244 };
2245
2246 static void target_core_dev_release(struct config_item *item)
2247 {
2248         struct config_group *dev_cg = to_config_group(item);
2249         struct se_device *dev =
2250                 container_of(dev_cg, struct se_device, dev_group);
2251
2252         kfree(dev_cg->default_groups);
2253         target_free_device(dev);
2254 }
2255
2256 static ssize_t target_core_dev_show(struct config_item *item,
2257                                      struct configfs_attribute *attr,
2258                                      char *page)
2259 {
2260         struct config_group *dev_cg = to_config_group(item);
2261         struct se_device *dev =
2262                 container_of(dev_cg, struct se_device, dev_group);
2263         struct target_core_configfs_attribute *tc_attr = container_of(
2264                         attr, struct target_core_configfs_attribute, attr);
2265
2266         if (!tc_attr->show)
2267                 return -EINVAL;
2268
2269         return tc_attr->show(dev, page);
2270 }
2271
2272 static ssize_t target_core_dev_store(struct config_item *item,
2273                                       struct configfs_attribute *attr,
2274                                       const char *page, size_t count)
2275 {
2276         struct config_group *dev_cg = to_config_group(item);
2277         struct se_device *dev =
2278                 container_of(dev_cg, struct se_device, dev_group);
2279         struct target_core_configfs_attribute *tc_attr = container_of(
2280                         attr, struct target_core_configfs_attribute, attr);
2281
2282         if (!tc_attr->store)
2283                 return -EINVAL;
2284
2285         return tc_attr->store(dev, page, count);
2286 }
2287
2288 static struct configfs_item_operations target_core_dev_item_ops = {
2289         .release                = target_core_dev_release,
2290         .show_attribute         = target_core_dev_show,
2291         .store_attribute        = target_core_dev_store,
2292 };
2293
2294 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2295
2296 /* End functions for struct config_item_type tb_dev_cit */
2297
2298 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2299
2300 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2301 #define SE_DEV_ALUA_LU_ATTR(_name, _mode)                               \
2302 static struct target_core_alua_lu_gp_attribute                          \
2303                         target_core_alua_lu_gp_##_name =                \
2304         __CONFIGFS_EATTR(_name, _mode,                                  \
2305         target_core_alua_lu_gp_show_attr_##_name,                       \
2306         target_core_alua_lu_gp_store_attr_##_name);
2307
2308 #define SE_DEV_ALUA_LU_ATTR_RO(_name)                                   \
2309 static struct target_core_alua_lu_gp_attribute                          \
2310                         target_core_alua_lu_gp_##_name =                \
2311         __CONFIGFS_EATTR_RO(_name,                                      \
2312         target_core_alua_lu_gp_show_attr_##_name);
2313
2314 /*
2315  * lu_gp_id
2316  */
2317 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2318         struct t10_alua_lu_gp *lu_gp,
2319         char *page)
2320 {
2321         if (!lu_gp->lu_gp_valid_id)
2322                 return 0;
2323
2324         return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2325 }
2326
2327 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2328         struct t10_alua_lu_gp *lu_gp,
2329         const char *page,
2330         size_t count)
2331 {
2332         struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2333         unsigned long lu_gp_id;
2334         int ret;
2335
2336         ret = kstrtoul(page, 0, &lu_gp_id);
2337         if (ret < 0) {
2338                 pr_err("kstrtoul() returned %d for"
2339                         " lu_gp_id\n", ret);
2340                 return ret;
2341         }
2342         if (lu_gp_id > 0x0000ffff) {
2343                 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2344                         " 0x0000ffff\n", lu_gp_id);
2345                 return -EINVAL;
2346         }
2347
2348         ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2349         if (ret < 0)
2350                 return -EINVAL;
2351
2352         pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2353                 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2354                 config_item_name(&alua_lu_gp_cg->cg_item),
2355                 lu_gp->lu_gp_id);
2356
2357         return count;
2358 }
2359
2360 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2361
2362 /*
2363  * members
2364  */
2365 static ssize_t target_core_alua_lu_gp_show_attr_members(
2366         struct t10_alua_lu_gp *lu_gp,
2367         char *page)
2368 {
2369         struct se_device *dev;
2370         struct se_hba *hba;
2371         struct t10_alua_lu_gp_member *lu_gp_mem;
2372         ssize_t len = 0, cur_len;
2373         unsigned char buf[LU_GROUP_NAME_BUF];
2374
2375         memset(buf, 0, LU_GROUP_NAME_BUF);
2376
2377         spin_lock(&lu_gp->lu_gp_lock);
2378         list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2379                 dev = lu_gp_mem->lu_gp_mem_dev;
2380                 hba = dev->se_hba;
2381
2382                 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2383                         config_item_name(&hba->hba_group.cg_item),
2384                         config_item_name(&dev->dev_group.cg_item));
2385                 cur_len++; /* Extra byte for NULL terminator */
2386
2387                 if ((cur_len + len) > PAGE_SIZE) {
2388                         pr_warn("Ran out of lu_gp_show_attr"
2389                                 "_members buffer\n");
2390                         break;
2391                 }
2392                 memcpy(page+len, buf, cur_len);
2393                 len += cur_len;
2394         }
2395         spin_unlock(&lu_gp->lu_gp_lock);
2396
2397         return len;
2398 }
2399
2400 SE_DEV_ALUA_LU_ATTR_RO(members);
2401
2402 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2403
2404 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2405         &target_core_alua_lu_gp_lu_gp_id.attr,
2406         &target_core_alua_lu_gp_members.attr,
2407         NULL,
2408 };
2409
2410 static void target_core_alua_lu_gp_release(struct config_item *item)
2411 {
2412         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2413                         struct t10_alua_lu_gp, lu_gp_group);
2414
2415         core_alua_free_lu_gp(lu_gp);
2416 }
2417
2418 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2419         .release                = target_core_alua_lu_gp_release,
2420         .show_attribute         = target_core_alua_lu_gp_attr_show,
2421         .store_attribute        = target_core_alua_lu_gp_attr_store,
2422 };
2423
2424 static struct config_item_type target_core_alua_lu_gp_cit = {
2425         .ct_item_ops            = &target_core_alua_lu_gp_ops,
2426         .ct_attrs               = target_core_alua_lu_gp_attrs,
2427         .ct_owner               = THIS_MODULE,
2428 };
2429
2430 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2431
2432 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2433
2434 static struct config_group *target_core_alua_create_lu_gp(
2435         struct config_group *group,
2436         const char *name)
2437 {
2438         struct t10_alua_lu_gp *lu_gp;
2439         struct config_group *alua_lu_gp_cg = NULL;
2440         struct config_item *alua_lu_gp_ci = NULL;
2441
2442         lu_gp = core_alua_allocate_lu_gp(name, 0);
2443         if (IS_ERR(lu_gp))
2444                 return NULL;
2445
2446         alua_lu_gp_cg = &lu_gp->lu_gp_group;
2447         alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2448
2449         config_group_init_type_name(alua_lu_gp_cg, name,
2450                         &target_core_alua_lu_gp_cit);
2451
2452         pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2453                 " Group: core/alua/lu_gps/%s\n",
2454                 config_item_name(alua_lu_gp_ci));
2455
2456         return alua_lu_gp_cg;
2457
2458 }
2459
2460 static void target_core_alua_drop_lu_gp(
2461         struct config_group *group,
2462         struct config_item *item)
2463 {
2464         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2465                         struct t10_alua_lu_gp, lu_gp_group);
2466
2467         pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2468                 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2469                 config_item_name(item), lu_gp->lu_gp_id);
2470         /*
2471          * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2472          * -> target_core_alua_lu_gp_release()
2473          */
2474         config_item_put(item);
2475 }
2476
2477 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2478         .make_group             = &target_core_alua_create_lu_gp,
2479         .drop_item              = &target_core_alua_drop_lu_gp,
2480 };
2481
2482 static struct config_item_type target_core_alua_lu_gps_cit = {
2483         .ct_item_ops            = NULL,
2484         .ct_group_ops           = &target_core_alua_lu_gps_group_ops,
2485         .ct_owner               = THIS_MODULE,
2486 };
2487
2488 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2489
2490 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2491
2492 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2493 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode)                            \
2494 static struct target_core_alua_tg_pt_gp_attribute                       \
2495                         target_core_alua_tg_pt_gp_##_name =             \
2496         __CONFIGFS_EATTR(_name, _mode,                                  \
2497         target_core_alua_tg_pt_gp_show_attr_##_name,                    \
2498         target_core_alua_tg_pt_gp_store_attr_##_name);
2499
2500 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name)                                \
2501 static struct target_core_alua_tg_pt_gp_attribute                       \
2502                         target_core_alua_tg_pt_gp_##_name =             \
2503         __CONFIGFS_EATTR_RO(_name,                                      \
2504         target_core_alua_tg_pt_gp_show_attr_##_name);
2505
2506 /*
2507  * alua_access_state
2508  */
2509 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2510         struct t10_alua_tg_pt_gp *tg_pt_gp,
2511         char *page)
2512 {
2513         return sprintf(page, "%d\n",
2514                 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2515 }
2516
2517 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2518         struct t10_alua_tg_pt_gp *tg_pt_gp,
2519         const char *page,
2520         size_t count)
2521 {
2522         struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2523         unsigned long tmp;
2524         int new_state, ret;
2525
2526         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2527                 pr_err("Unable to do implicit ALUA on non valid"
2528                         " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2529                 return -EINVAL;
2530         }
2531         if (!(dev->dev_flags & DF_CONFIGURED)) {
2532                 pr_err("Unable to set alua_access_state while device is"
2533                        " not configured\n");
2534                 return -ENODEV;
2535         }
2536
2537         ret = kstrtoul(page, 0, &tmp);
2538         if (ret < 0) {
2539                 pr_err("Unable to extract new ALUA access state from"
2540                                 " %s\n", page);
2541                 return ret;
2542         }
2543         new_state = (int)tmp;
2544
2545         if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2546                 pr_err("Unable to process implicit configfs ALUA"
2547                         " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2548                 return -EINVAL;
2549         }
2550         if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2551             new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2552                 /* LBA DEPENDENT is only allowed with implicit ALUA */
2553                 pr_err("Unable to process implicit configfs ALUA transition"
2554                        " while explicit ALUA management is enabled\n");
2555                 return -EINVAL;
2556         }
2557
2558         ret = core_alua_do_port_transition(tg_pt_gp, dev,
2559                                         NULL, NULL, new_state, 0);
2560         return (!ret) ? count : -EINVAL;
2561 }
2562
2563 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2564
2565 /*
2566  * alua_access_status
2567  */
2568 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2569         struct t10_alua_tg_pt_gp *tg_pt_gp,
2570         char *page)
2571 {
2572         return sprintf(page, "%s\n",
2573                 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2574 }
2575
2576 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2577         struct t10_alua_tg_pt_gp *tg_pt_gp,
2578         const char *page,
2579         size_t count)
2580 {
2581         unsigned long tmp;
2582         int new_status, ret;
2583
2584         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2585                 pr_err("Unable to do set ALUA access status on non"
2586                         " valid tg_pt_gp ID: %hu\n",
2587                         tg_pt_gp->tg_pt_gp_valid_id);
2588                 return -EINVAL;
2589         }
2590
2591         ret = kstrtoul(page, 0, &tmp);
2592         if (ret < 0) {
2593                 pr_err("Unable to extract new ALUA access status"
2594                                 " from %s\n", page);
2595                 return ret;
2596         }
2597         new_status = (int)tmp;
2598
2599         if ((new_status != ALUA_STATUS_NONE) &&
2600             (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2601             (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2602                 pr_err("Illegal ALUA access status: 0x%02x\n",
2603                                 new_status);
2604                 return -EINVAL;
2605         }
2606
2607         tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2608         return count;
2609 }
2610
2611 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2612
2613 /*
2614  * alua_access_type
2615  */
2616 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2617         struct t10_alua_tg_pt_gp *tg_pt_gp,
2618         char *page)
2619 {
2620         return core_alua_show_access_type(tg_pt_gp, page);
2621 }
2622
2623 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2624         struct t10_alua_tg_pt_gp *tg_pt_gp,
2625         const char *page,
2626         size_t count)
2627 {
2628         return core_alua_store_access_type(tg_pt_gp, page, count);
2629 }
2630
2631 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2632
2633 /*
2634  * alua_supported_states
2635  */
2636
2637 #define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit)               \
2638 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \
2639         struct t10_alua_tg_pt_gp *t, char *p)                           \
2640 {                                                                       \
2641         return sprintf(p, "%d\n", !!(t->_var & _bit));                  \
2642 }
2643
2644 #define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit)              \
2645 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\
2646         struct t10_alua_tg_pt_gp *t, const char *p, size_t c)           \
2647 {                                                                       \
2648         unsigned long tmp;                                              \
2649         int ret;                                                        \
2650                                                                         \
2651         if (!t->tg_pt_gp_valid_id) {                                    \
2652                 pr_err("Unable to do set ##_name ALUA state on non"     \
2653                        " valid tg_pt_gp ID: %hu\n",                     \
2654                        t->tg_pt_gp_valid_id);                           \
2655                 return -EINVAL;                                         \
2656         }                                                               \
2657                                                                         \
2658         ret = kstrtoul(p, 0, &tmp);                                     \
2659         if (ret < 0) {                                                  \
2660                 pr_err("Invalid value '%s', must be '0' or '1'\n", p);  \
2661                 return -EINVAL;                                         \
2662         }                                                               \
2663         if (tmp > 1) {                                                  \
2664                 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2665                 return -EINVAL;                                         \
2666         }                                                               \
2667         if (tmp)                                                        \
2668                 t->_var |= _bit;                                        \
2669         else                                                            \
2670                 t->_var &= ~_bit;                                       \
2671                                                                         \
2672         return c;                                                       \
2673 }
2674
2675 SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning,
2676                                tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2677 SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning,
2678                                 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2679 SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR);
2680
2681 SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline,
2682                                tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2683 SE_DEV_ALUA_SUPPORT_STATE_STORE(offline,
2684                                 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2685 SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR);
2686
2687 SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent,
2688                                tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2689 SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent,
2690                                 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2691 SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO);
2692
2693 SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable,
2694                                tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2695 SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable,
2696                                 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2697 SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR);
2698
2699 SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby,
2700                                tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2701 SE_DEV_ALUA_SUPPORT_STATE_STORE(standby,
2702                                 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2703 SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR);
2704
2705 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized,
2706                                tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2707 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized,
2708                                 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2709 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR);
2710
2711 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized,
2712                                tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2713 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized,
2714                                 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2715 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR);
2716
2717 /*
2718  * alua_write_metadata
2719  */
2720 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2721         struct t10_alua_tg_pt_gp *tg_pt_gp,
2722         char *page)
2723 {
2724         return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2725 }
2726
2727 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2728         struct t10_alua_tg_pt_gp *tg_pt_gp,
2729         const char *page,
2730         size_t count)
2731 {
2732         unsigned long tmp;
2733         int ret;
2734
2735         ret = kstrtoul(page, 0, &tmp);
2736         if (ret < 0) {
2737                 pr_err("Unable to extract alua_write_metadata\n");
2738                 return ret;
2739         }
2740
2741         if ((tmp != 0) && (tmp != 1)) {
2742                 pr_err("Illegal value for alua_write_metadata:"
2743                         " %lu\n", tmp);
2744                 return -EINVAL;
2745         }
2746         tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2747
2748         return count;
2749 }
2750
2751 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2752
2753
2754
2755 /*
2756  * nonop_delay_msecs
2757  */
2758 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2759         struct t10_alua_tg_pt_gp *tg_pt_gp,
2760         char *page)
2761 {
2762         return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2763
2764 }
2765
2766 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2767         struct t10_alua_tg_pt_gp *tg_pt_gp,
2768         const char *page,
2769         size_t count)
2770 {
2771         return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2772 }
2773
2774 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2775
2776 /*
2777  * trans_delay_msecs
2778  */
2779 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2780         struct t10_alua_tg_pt_gp *tg_pt_gp,
2781         char *page)
2782 {
2783         return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2784 }
2785
2786 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2787         struct t10_alua_tg_pt_gp *tg_pt_gp,
2788         const char *page,
2789         size_t count)
2790 {
2791         return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2792 }
2793
2794 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2795
2796 /*
2797  * implicit_trans_secs
2798  */
2799 static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs(
2800         struct t10_alua_tg_pt_gp *tg_pt_gp,
2801         char *page)
2802 {
2803         return core_alua_show_implicit_trans_secs(tg_pt_gp, page);
2804 }
2805
2806 static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs(
2807         struct t10_alua_tg_pt_gp *tg_pt_gp,
2808         const char *page,
2809         size_t count)
2810 {
2811         return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count);
2812 }
2813
2814 SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR);
2815
2816 /*
2817  * preferred
2818  */
2819
2820 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2821         struct t10_alua_tg_pt_gp *tg_pt_gp,
2822         char *page)
2823 {
2824         return core_alua_show_preferred_bit(tg_pt_gp, page);
2825 }
2826
2827 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2828         struct t10_alua_tg_pt_gp *tg_pt_gp,
2829         const char *page,
2830         size_t count)
2831 {
2832         return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2833 }
2834
2835 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2836
2837 /*
2838  * tg_pt_gp_id
2839  */
2840 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2841         struct t10_alua_tg_pt_gp *tg_pt_gp,
2842         char *page)
2843 {
2844         if (!tg_pt_gp->tg_pt_gp_valid_id)
2845                 return 0;
2846
2847         return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2848 }
2849
2850 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2851         struct t10_alua_tg_pt_gp *tg_pt_gp,
2852         const char *page,
2853         size_t count)
2854 {
2855         struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2856         unsigned long tg_pt_gp_id;
2857         int ret;
2858
2859         ret = kstrtoul(page, 0, &tg_pt_gp_id);
2860         if (ret < 0) {
2861                 pr_err("kstrtoul() returned %d for"
2862                         " tg_pt_gp_id\n", ret);
2863                 return ret;
2864         }
2865         if (tg_pt_gp_id > 0x0000ffff) {
2866                 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2867                         " 0x0000ffff\n", tg_pt_gp_id);
2868                 return -EINVAL;
2869         }
2870
2871         ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2872         if (ret < 0)
2873                 return -EINVAL;
2874
2875         pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2876                 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2877                 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2878                 tg_pt_gp->tg_pt_gp_id);
2879
2880         return count;
2881 }
2882
2883 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2884
2885 /*
2886  * members
2887  */
2888 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2889         struct t10_alua_tg_pt_gp *tg_pt_gp,
2890         char *page)
2891 {
2892         struct se_lun *lun;
2893         ssize_t len = 0, cur_len;
2894         unsigned char buf[TG_PT_GROUP_NAME_BUF];
2895
2896         memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2897
2898         spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2899         list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
2900                         lun_tg_pt_gp_link) {
2901                 struct se_portal_group *tpg = lun->lun_tpg;
2902
2903                 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2904                         "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2905                         tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2906                         tpg->se_tpg_tfo->tpg_get_tag(tpg),
2907                         config_item_name(&lun->lun_group.cg_item));
2908                 cur_len++; /* Extra byte for NULL terminator */
2909
2910                 if ((cur_len + len) > PAGE_SIZE) {
2911                         pr_warn("Ran out of lu_gp_show_attr"
2912                                 "_members buffer\n");
2913                         break;
2914                 }
2915                 memcpy(page+len, buf, cur_len);
2916                 len += cur_len;
2917         }
2918         spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2919
2920         return len;
2921 }
2922
2923 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2924
2925 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2926                         tg_pt_gp_group);
2927
2928 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2929         &target_core_alua_tg_pt_gp_alua_access_state.attr,
2930         &target_core_alua_tg_pt_gp_alua_access_status.attr,
2931         &target_core_alua_tg_pt_gp_alua_access_type.attr,
2932         &target_core_alua_tg_pt_gp_alua_support_transitioning.attr,
2933         &target_core_alua_tg_pt_gp_alua_support_offline.attr,
2934         &target_core_alua_tg_pt_gp_alua_support_lba_dependent.attr,
2935         &target_core_alua_tg_pt_gp_alua_support_unavailable.attr,
2936         &target_core_alua_tg_pt_gp_alua_support_standby.attr,
2937         &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized.attr,
2938         &target_core_alua_tg_pt_gp_alua_support_active_optimized.attr,
2939         &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2940         &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2941         &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2942         &target_core_alua_tg_pt_gp_implicit_trans_secs.attr,
2943         &target_core_alua_tg_pt_gp_preferred.attr,
2944         &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2945         &target_core_alua_tg_pt_gp_members.attr,
2946         NULL,
2947 };
2948
2949 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2950 {
2951         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2952                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2953
2954         core_alua_free_tg_pt_gp(tg_pt_gp);
2955 }
2956
2957 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2958         .release                = target_core_alua_tg_pt_gp_release,
2959         .show_attribute         = target_core_alua_tg_pt_gp_attr_show,
2960         .store_attribute        = target_core_alua_tg_pt_gp_attr_store,
2961 };
2962
2963 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2964         .ct_item_ops            = &target_core_alua_tg_pt_gp_ops,
2965         .ct_attrs               = target_core_alua_tg_pt_gp_attrs,
2966         .ct_owner               = THIS_MODULE,
2967 };
2968
2969 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2970
2971 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2972
2973 static struct config_group *target_core_alua_create_tg_pt_gp(
2974         struct config_group *group,
2975         const char *name)
2976 {
2977         struct t10_alua *alua = container_of(group, struct t10_alua,
2978                                         alua_tg_pt_gps_group);
2979         struct t10_alua_tg_pt_gp *tg_pt_gp;
2980         struct config_group *alua_tg_pt_gp_cg = NULL;
2981         struct config_item *alua_tg_pt_gp_ci = NULL;
2982
2983         tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2984         if (!tg_pt_gp)
2985                 return NULL;
2986
2987         alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2988         alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2989
2990         config_group_init_type_name(alua_tg_pt_gp_cg, name,
2991                         &target_core_alua_tg_pt_gp_cit);
2992
2993         pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2994                 " Group: alua/tg_pt_gps/%s\n",
2995                 config_item_name(alua_tg_pt_gp_ci));
2996
2997         return alua_tg_pt_gp_cg;
2998 }
2999
3000 static void target_core_alua_drop_tg_pt_gp(
3001         struct config_group *group,
3002         struct config_item *item)
3003 {
3004         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3005                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3006
3007         pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
3008                 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
3009                 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
3010         /*
3011          * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
3012          * -> target_core_alua_tg_pt_gp_release().
3013          */
3014         config_item_put(item);
3015 }
3016
3017 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
3018         .make_group             = &target_core_alua_create_tg_pt_gp,
3019         .drop_item              = &target_core_alua_drop_tg_pt_gp,
3020 };
3021
3022 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
3023
3024 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3025
3026 /* Start functions for struct config_item_type target_core_alua_cit */
3027
3028 /*
3029  * target_core_alua_cit is a ConfigFS group that lives under
3030  * /sys/kernel/config/target/core/alua.  There are default groups
3031  * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
3032  * target_core_alua_cit in target_core_init_configfs() below.
3033  */
3034 static struct config_item_type target_core_alua_cit = {
3035         .ct_item_ops            = NULL,
3036         .ct_attrs               = NULL,
3037         .ct_owner               = THIS_MODULE,
3038 };
3039
3040 /* End functions for struct config_item_type target_core_alua_cit */
3041
3042 /* Start functions for struct config_item_type tb_dev_stat_cit */
3043
3044 static struct config_group *target_core_stat_mkdir(
3045         struct config_group *group,
3046         const char *name)
3047 {
3048         return ERR_PTR(-ENOSYS);
3049 }
3050
3051 static void target_core_stat_rmdir(
3052         struct config_group *group,
3053         struct config_item *item)
3054 {
3055         return;
3056 }
3057
3058 static struct configfs_group_operations target_core_stat_group_ops = {
3059         .make_group             = &target_core_stat_mkdir,
3060         .drop_item              = &target_core_stat_rmdir,
3061 };
3062
3063 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
3064
3065 /* End functions for struct config_item_type tb_dev_stat_cit */
3066
3067 /* Start functions for struct config_item_type target_core_hba_cit */
3068
3069 static struct config_group *target_core_make_subdev(
3070         struct config_group *group,
3071         const char *name)
3072 {
3073         struct t10_alua_tg_pt_gp *tg_pt_gp;
3074         struct config_item *hba_ci = &group->cg_item;
3075         struct se_hba *hba = item_to_hba(hba_ci);
3076         struct target_backend *tb = hba->backend;
3077         struct se_device *dev;
3078         struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
3079         struct config_group *dev_stat_grp = NULL;
3080         int errno = -ENOMEM, ret;
3081
3082         ret = mutex_lock_interruptible(&hba->hba_access_mutex);
3083         if (ret)
3084                 return ERR_PTR(ret);
3085
3086         dev = target_alloc_device(hba, name);
3087         if (!dev)
3088                 goto out_unlock;
3089
3090         dev_cg = &dev->dev_group;
3091
3092         dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
3093                         GFP_KERNEL);
3094         if (!dev_cg->default_groups)
3095                 goto out_free_device;
3096
3097         config_group_init_type_name(dev_cg, name, &tb->tb_dev_cit);
3098         config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
3099                         &tb->tb_dev_attrib_cit);
3100         config_group_init_type_name(&dev->dev_pr_group, "pr",
3101                         &tb->tb_dev_pr_cit);
3102         config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
3103                         &tb->tb_dev_wwn_cit);
3104         config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
3105                         "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
3106         config_group_init_type_name(&dev->dev_stat_grps.stat_group,
3107                         "statistics", &tb->tb_dev_stat_cit);
3108
3109         dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
3110         dev_cg->default_groups[1] = &dev->dev_pr_group;
3111         dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
3112         dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
3113         dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
3114         dev_cg->default_groups[5] = NULL;
3115         /*
3116          * Add core/$HBA/$DEV/alua/default_tg_pt_gp
3117          */
3118         tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
3119         if (!tg_pt_gp)
3120                 goto out_free_dev_cg_default_groups;
3121         dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
3122
3123         tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
3124         tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3125                                 GFP_KERNEL);
3126         if (!tg_pt_gp_cg->default_groups) {
3127                 pr_err("Unable to allocate tg_pt_gp_cg->"
3128                                 "default_groups\n");
3129                 goto out_free_tg_pt_gp;
3130         }
3131
3132         config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
3133                         "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
3134         tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
3135         tg_pt_gp_cg->default_groups[1] = NULL;
3136         /*
3137          * Add core/$HBA/$DEV/statistics/ default groups
3138          */
3139         dev_stat_grp = &dev->dev_stat_grps.stat_group;
3140         dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
3141                                 GFP_KERNEL);
3142         if (!dev_stat_grp->default_groups) {
3143                 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
3144                 goto out_free_tg_pt_gp_cg_default_groups;
3145         }
3146         target_stat_setup_dev_default_groups(dev);
3147
3148         mutex_unlock(&hba->hba_access_mutex);
3149         return dev_cg;
3150
3151 out_free_tg_pt_gp_cg_default_groups:
3152         kfree(tg_pt_gp_cg->default_groups);
3153 out_free_tg_pt_gp:
3154         core_alua_free_tg_pt_gp(tg_pt_gp);
3155 out_free_dev_cg_default_groups:
3156         kfree(dev_cg->default_groups);
3157 out_free_device:
3158         target_free_device(dev);
3159 out_unlock:
3160         mutex_unlock(&hba->hba_access_mutex);
3161         return ERR_PTR(errno);
3162 }
3163
3164 static void target_core_drop_subdev(
3165         struct config_group *group,
3166         struct config_item *item)
3167 {
3168         struct config_group *dev_cg = to_config_group(item);
3169         struct se_device *dev =
3170                 container_of(dev_cg, struct se_device, dev_group);
3171         struct se_hba *hba;
3172         struct config_item *df_item;
3173         struct config_group *tg_pt_gp_cg, *dev_stat_grp;
3174         int i;
3175
3176         hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
3177
3178         mutex_lock(&hba->hba_access_mutex);
3179
3180         dev_stat_grp = &dev->dev_stat_grps.stat_group;
3181         for (i = 0; dev_stat_grp->default_groups[i]; i++) {
3182                 df_item = &dev_stat_grp->default_groups[i]->cg_item;
3183                 dev_stat_grp->default_groups[i] = NULL;
3184                 config_item_put(df_item);
3185         }
3186         kfree(dev_stat_grp->default_groups);
3187
3188         tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
3189         for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
3190                 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
3191                 tg_pt_gp_cg->default_groups[i] = NULL;
3192                 config_item_put(df_item);
3193         }
3194         kfree(tg_pt_gp_cg->default_groups);
3195         /*
3196          * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
3197          * directly from target_core_alua_tg_pt_gp_release().
3198          */
3199         dev->t10_alua.default_tg_pt_gp = NULL;
3200
3201         for (i = 0; dev_cg->default_groups[i]; i++) {
3202                 df_item = &dev_cg->default_groups[i]->cg_item;
3203                 dev_cg->default_groups[i] = NULL;
3204                 config_item_put(df_item);
3205         }
3206         /*
3207          * se_dev is released from target_core_dev_item_ops->release()
3208          */
3209         config_item_put(item);
3210         mutex_unlock(&hba->hba_access_mutex);
3211 }
3212
3213 static struct configfs_group_operations target_core_hba_group_ops = {
3214         .make_group             = target_core_make_subdev,
3215         .drop_item              = target_core_drop_subdev,
3216 };
3217
3218 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
3219 #define SE_HBA_ATTR(_name, _mode)                               \
3220 static struct target_core_hba_attribute                         \
3221                 target_core_hba_##_name =                       \
3222                 __CONFIGFS_EATTR(_name, _mode,                  \
3223                 target_core_hba_show_attr_##_name,              \
3224                 target_core_hba_store_attr_##_name);
3225
3226 #define SE_HBA_ATTR_RO(_name)                                   \
3227 static struct target_core_hba_attribute                         \
3228                 target_core_hba_##_name =                       \
3229                 __CONFIGFS_EATTR_RO(_name,                      \
3230                 target_core_hba_show_attr_##_name);
3231
3232 static ssize_t target_core_hba_show_attr_hba_info(
3233         struct se_hba *hba,
3234         char *page)
3235 {
3236         return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
3237                         hba->hba_id, hba->backend->ops->name,
3238                         TARGET_CORE_CONFIGFS_VERSION);
3239 }
3240
3241 SE_HBA_ATTR_RO(hba_info);
3242
3243 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
3244                                 char *page)
3245 {
3246         int hba_mode = 0;
3247
3248         if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
3249                 hba_mode = 1;
3250
3251         return sprintf(page, "%d\n", hba_mode);
3252 }
3253
3254 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
3255                                 const char *page, size_t count)
3256 {
3257         unsigned long mode_flag;
3258         int ret;
3259
3260         if (hba->backend->ops->pmode_enable_hba == NULL)
3261                 return -EINVAL;
3262
3263         ret = kstrtoul(page, 0, &mode_flag);
3264         if (ret < 0) {
3265                 pr_err("Unable to extract hba mode flag: %d\n", ret);
3266                 return ret;
3267         }
3268
3269         if (hba->dev_count) {
3270                 pr_err("Unable to set hba_mode with active devices\n");
3271                 return -EINVAL;
3272         }
3273
3274         ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
3275         if (ret < 0)
3276                 return -EINVAL;
3277         if (ret > 0)
3278                 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3279         else if (ret == 0)
3280                 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3281
3282         return count;
3283 }
3284
3285 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
3286
3287 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
3288
3289 static void target_core_hba_release(struct config_item *item)
3290 {
3291         struct se_hba *hba = container_of(to_config_group(item),
3292                                 struct se_hba, hba_group);
3293         core_delete_hba(hba);
3294 }
3295
3296 static struct configfs_attribute *target_core_hba_attrs[] = {
3297         &target_core_hba_hba_info.attr,
3298         &target_core_hba_hba_mode.attr,
3299         NULL,
3300 };
3301
3302 static struct configfs_item_operations target_core_hba_item_ops = {
3303         .release                = target_core_hba_release,
3304         .show_attribute         = target_core_hba_attr_show,
3305         .store_attribute        = target_core_hba_attr_store,
3306 };
3307
3308 static struct config_item_type target_core_hba_cit = {
3309         .ct_item_ops            = &target_core_hba_item_ops,
3310         .ct_group_ops           = &target_core_hba_group_ops,
3311         .ct_attrs               = target_core_hba_attrs,
3312         .ct_owner               = THIS_MODULE,
3313 };
3314
3315 static struct config_group *target_core_call_addhbatotarget(
3316         struct config_group *group,
3317         const char *name)
3318 {
3319         char *se_plugin_str, *str, *str2;
3320         struct se_hba *hba;
3321         char buf[TARGET_CORE_NAME_MAX_LEN];
3322         unsigned long plugin_dep_id = 0;
3323         int ret;
3324
3325         memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3326         if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3327                 pr_err("Passed *name strlen(): %d exceeds"
3328                         " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3329                         TARGET_CORE_NAME_MAX_LEN);
3330                 return ERR_PTR(-ENAMETOOLONG);
3331         }
3332         snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3333
3334         str = strstr(buf, "_");
3335         if (!str) {
3336                 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3337                 return ERR_PTR(-EINVAL);
3338         }
3339         se_plugin_str = buf;
3340         /*
3341          * Special case for subsystem plugins that have "_" in their names.
3342          * Namely rd_direct and rd_mcp..
3343          */
3344         str2 = strstr(str+1, "_");
3345         if (str2) {
3346                 *str2 = '\0'; /* Terminate for *se_plugin_str */
3347                 str2++; /* Skip to start of plugin dependent ID */
3348                 str = str2;
3349         } else {
3350                 *str = '\0'; /* Terminate for *se_plugin_str */
3351                 str++; /* Skip to start of plugin dependent ID */
3352         }
3353
3354         ret = kstrtoul(str, 0, &plugin_dep_id);
3355         if (ret < 0) {
3356                 pr_err("kstrtoul() returned %d for"
3357                                 " plugin_dep_id\n", ret);
3358                 return ERR_PTR(ret);
3359         }
3360         /*
3361          * Load up TCM subsystem plugins if they have not already been loaded.
3362          */
3363         transport_subsystem_check_init();
3364
3365         hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3366         if (IS_ERR(hba))
3367                 return ERR_CAST(hba);
3368
3369         config_group_init_type_name(&hba->hba_group, name,
3370                         &target_core_hba_cit);
3371
3372         return &hba->hba_group;
3373 }
3374
3375 static void target_core_call_delhbafromtarget(
3376         struct config_group *group,
3377         struct config_item *item)
3378 {
3379         /*
3380          * core_delete_hba() is called from target_core_hba_item_ops->release()
3381          * -> target_core_hba_release()
3382          */
3383         config_item_put(item);
3384 }
3385
3386 static struct configfs_group_operations target_core_group_ops = {
3387         .make_group     = target_core_call_addhbatotarget,
3388         .drop_item      = target_core_call_delhbafromtarget,
3389 };
3390
3391 static struct config_item_type target_core_cit = {
3392         .ct_item_ops    = NULL,
3393         .ct_group_ops   = &target_core_group_ops,
3394         .ct_attrs       = NULL,
3395         .ct_owner       = THIS_MODULE,
3396 };
3397
3398 /* Stop functions for struct config_item_type target_core_hba_cit */
3399
3400 void target_setup_backend_cits(struct target_backend *tb)
3401 {
3402         target_core_setup_dev_cit(tb);
3403         target_core_setup_dev_attrib_cit(tb);
3404         target_core_setup_dev_pr_cit(tb);
3405         target_core_setup_dev_wwn_cit(tb);
3406         target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3407         target_core_setup_dev_stat_cit(tb);
3408 }
3409
3410 static int __init target_core_init_configfs(void)
3411 {
3412         struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3413         struct config_group *lu_gp_cg = NULL;
3414         struct configfs_subsystem *subsys = &target_core_fabrics;
3415         struct t10_alua_lu_gp *lu_gp;
3416         int ret;
3417
3418         pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3419                 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3420                 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3421
3422         config_group_init(&subsys->su_group);
3423         mutex_init(&subsys->su_mutex);
3424
3425         ret = init_se_kmem_caches();
3426         if (ret < 0)
3427                 return ret;
3428         /*
3429          * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3430          * and ALUA Logical Unit Group and Target Port Group infrastructure.
3431          */
3432         target_cg = &subsys->su_group;
3433         target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3434                                 GFP_KERNEL);
3435         if (!target_cg->default_groups) {
3436                 pr_err("Unable to allocate target_cg->default_groups\n");
3437                 ret = -ENOMEM;
3438                 goto out_global;
3439         }
3440
3441         config_group_init_type_name(&target_core_hbagroup,
3442                         "core", &target_core_cit);
3443         target_cg->default_groups[0] = &target_core_hbagroup;
3444         target_cg->default_groups[1] = NULL;
3445         /*
3446          * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3447          */
3448         hba_cg = &target_core_hbagroup;
3449         hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3450                                 GFP_KERNEL);
3451         if (!hba_cg->default_groups) {
3452                 pr_err("Unable to allocate hba_cg->default_groups\n");
3453                 ret = -ENOMEM;
3454                 goto out_global;
3455         }
3456         config_group_init_type_name(&alua_group,
3457                         "alua", &target_core_alua_cit);
3458         hba_cg->default_groups[0] = &alua_group;
3459         hba_cg->default_groups[1] = NULL;
3460         /*
3461          * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3462          * groups under /sys/kernel/config/target/core/alua/
3463          */
3464         alua_cg = &alua_group;
3465         alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3466                         GFP_KERNEL);
3467         if (!alua_cg->default_groups) {
3468                 pr_err("Unable to allocate alua_cg->default_groups\n");
3469                 ret = -ENOMEM;
3470                 goto out_global;
3471         }
3472
3473         config_group_init_type_name(&alua_lu_gps_group,
3474                         "lu_gps", &target_core_alua_lu_gps_cit);
3475         alua_cg->default_groups[0] = &alua_lu_gps_group;
3476         alua_cg->default_groups[1] = NULL;
3477         /*
3478          * Add core/alua/lu_gps/default_lu_gp
3479          */
3480         lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3481         if (IS_ERR(lu_gp)) {
3482                 ret = -ENOMEM;
3483                 goto out_global;
3484         }
3485
3486         lu_gp_cg = &alua_lu_gps_group;
3487         lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3488                         GFP_KERNEL);
3489         if (!lu_gp_cg->default_groups) {
3490                 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3491                 ret = -ENOMEM;
3492                 goto out_global;
3493         }
3494
3495         config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3496                                 &target_core_alua_lu_gp_cit);
3497         lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3498         lu_gp_cg->default_groups[1] = NULL;
3499         default_lu_gp = lu_gp;
3500         /*
3501          * Register the target_core_mod subsystem with configfs.
3502          */
3503         ret = configfs_register_subsystem(subsys);
3504         if (ret < 0) {
3505                 pr_err("Error %d while registering subsystem %s\n",
3506                         ret, subsys->su_group.cg_item.ci_namebuf);
3507                 goto out_global;
3508         }
3509         pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3510                 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3511                 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3512         /*
3513          * Register built-in RAMDISK subsystem logic for virtual LUN 0
3514          */
3515         ret = rd_module_init();
3516         if (ret < 0)
3517                 goto out;
3518
3519         ret = core_dev_setup_virtual_lun0();
3520         if (ret < 0)
3521                 goto out;
3522
3523         ret = target_xcopy_setup_pt();
3524         if (ret < 0)
3525                 goto out;
3526
3527         return 0;
3528
3529 out:
3530         configfs_unregister_subsystem(subsys);
3531         core_dev_release_virtual_lun0();
3532         rd_module_exit();
3533 out_global:
3534         if (default_lu_gp) {
3535                 core_alua_free_lu_gp(default_lu_gp);
3536                 default_lu_gp = NULL;
3537         }
3538         if (lu_gp_cg)
3539                 kfree(lu_gp_cg->default_groups);
3540         if (alua_cg)
3541                 kfree(alua_cg->default_groups);
3542         if (hba_cg)
3543                 kfree(hba_cg->default_groups);
3544         kfree(target_cg->default_groups);
3545         release_se_kmem_caches();
3546         return ret;
3547 }
3548
3549 static void __exit target_core_exit_configfs(void)
3550 {
3551         struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3552         struct config_item *item;
3553         int i;
3554
3555         lu_gp_cg = &alua_lu_gps_group;
3556         for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3557                 item = &lu_gp_cg->default_groups[i]->cg_item;
3558                 lu_gp_cg->default_groups[i] = NULL;
3559                 config_item_put(item);
3560         }
3561         kfree(lu_gp_cg->default_groups);
3562         lu_gp_cg->default_groups = NULL;
3563
3564         alua_cg = &alua_group;
3565         for (i = 0; alua_cg->default_groups[i]; i++) {
3566                 item = &alua_cg->default_groups[i]->cg_item;
3567                 alua_cg->default_groups[i] = NULL;
3568                 config_item_put(item);
3569         }
3570         kfree(alua_cg->default_groups);
3571         alua_cg->default_groups = NULL;
3572
3573         hba_cg = &target_core_hbagroup;
3574         for (i = 0; hba_cg->default_groups[i]; i++) {
3575                 item = &hba_cg->default_groups[i]->cg_item;
3576                 hba_cg->default_groups[i] = NULL;
3577                 config_item_put(item);
3578         }
3579         kfree(hba_cg->default_groups);
3580         hba_cg->default_groups = NULL;
3581         /*
3582          * We expect subsys->su_group.default_groups to be released
3583          * by configfs subsystem provider logic..
3584          */
3585         configfs_unregister_subsystem(&target_core_fabrics);
3586         kfree(target_core_fabrics.su_group.default_groups);
3587
3588         core_alua_free_lu_gp(default_lu_gp);
3589         default_lu_gp = NULL;
3590
3591         pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3592                         " Infrastructure\n");
3593
3594         core_dev_release_virtual_lun0();
3595         rd_module_exit();
3596         target_xcopy_release_pt();
3597         release_se_kmem_caches();
3598 }
3599
3600 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3601 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3602 MODULE_LICENSE("GPL");
3603
3604 module_init(target_core_init_configfs);
3605 module_exit(target_core_exit_configfs);