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