drivers/target/target_core_configfs.c

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