drivers/target/target_core_configfs.c

   1 /*******************************************************************************
   2  * Filename:  target_core_configfs.c
   3  *
   4  * This file contains ConfigFS logic for the Generic Target Engine project.
   5  *
   6  * (c) Copyright 2008-2013 Datera, Inc.
   7  *
   8  * Nicholas A. Bellinger <nab@kernel.org>
   9  *
  10  * based on configfs Copyright (C) 2005 Oracle.  All rights reserved.
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  ****************************************************************************/
  22
  23 #include <linux/module.h>
  24 #include <linux/moduleparam.h>
  25 #include <generated/utsrelease.h>
  26 #include <linux/utsname.h>
  27 #include <linux/init.h>
  28 #include <linux/fs.h>
  29 #include <linux/namei.h>
  30 #include <linux/slab.h>
  31 #include <linux/types.h>
  32 #include <linux/delay.h>
  33 #include <linux/unistd.h>
  34 #include <linux/string.h>
  35 #include <linux/parser.h>
  36 #include <linux/syscalls.h>
  37 #include <linux/configfs.h>
  38 #include <linux/spinlock.h>
  39
  40 #include <target/target_core_base.h>
  41 #include <target/target_core_backend.h>
  42 #include <target/target_core_fabric.h>
  43 #include <target/target_core_fabric_configfs.h>
  44 #include <target/target_core_configfs.h>
  45 #include <target/configfs_macros.h>
  46
  47 #include "target_core_internal.h"
  48 #include "target_core_alua.h"
  49 #include "target_core_pr.h"
  50 #include "target_core_rd.h"
  51 #include "target_core_xcopy.h"
  52
  53 extern struct t10_alua_lu_gp *default_lu_gp;
  54
  55 static LIST_HEAD(g_tf_list);
  56 static DEFINE_MUTEX(g_tf_lock);
  57
  58 struct target_core_configfs_attribute {
  59         struct configfs_attribute attr;
  60         ssize_t (*show)(void *, char *);
  61         ssize_t (*store)(void *, const char *, size_t);
  62 };
  63
  64 static struct config_group target_core_hbagroup;
  65 static struct config_group alua_group;
  66 static struct config_group alua_lu_gps_group;
  67
  68 static inline struct se_hba *
  69 item_to_hba(struct config_item *item)
  70 {
  71         return container_of(to_config_group(item), struct se_hba, hba_group);
  72 }
  73
  74 /*
  75  * Attributes for /sys/kernel/config/target/
  76  */
  77 static ssize_t target_core_attr_show(struct config_item *item,
  78                                       struct configfs_attribute *attr,
  79                                       char *page)
  80 {
  81         return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
  82                 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
  83                 utsname()->sysname, utsname()->machine);
  84 }
  85
  86 static struct configfs_item_operations target_core_fabric_item_ops = {
  87         .show_attribute = target_core_attr_show,
  88 };
  89
  90 static struct configfs_attribute target_core_item_attr_version = {
  91         .ca_owner       = THIS_MODULE,
  92         .ca_name        = "version",
  93         .ca_mode        = S_IRUGO,
  94 };
  95
  96 static struct target_fabric_configfs *target_core_get_fabric(
  97         const char *name)
  98 {
  99         struct target_fabric_configfs *tf;
 100
 101         if (!name)
 102                 return NULL;
 103
 104         mutex_lock(&g_tf_lock);
 105         list_for_each_entry(tf, &g_tf_list, tf_list) {
 106                 if (!strcmp(tf->tf_name, name)) {
 107                         atomic_inc(&tf->tf_access_cnt);
 108                         mutex_unlock(&g_tf_lock);
 109                         return tf;
 110                 }
 111         }
 112         mutex_unlock(&g_tf_lock);
 113
 114         return NULL;
 115 }
 116
 117 /*
 118  * Called from struct target_core_group_ops->make_group()
 119  */
 120 static struct config_group *target_core_register_fabric(
 121         struct config_group *group,
 122         const char *name)
 123 {
 124         struct target_fabric_configfs *tf;
 125         int ret;
 126
 127         pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
 128                         " %s\n", group, name);
 129         /*
 130          * Below are some hardcoded request_module() calls to automatically
 131          * local fabric modules when the following is called:
 132          *
 133          * mkdir -p /sys/kernel/config/target/$MODULE_NAME
 134          *
 135          * Note that this does not limit which TCM fabric module can be
 136          * registered, but simply provids auto loading logic for modules with
 137          * mkdir(2) system calls with known TCM fabric modules.
 138          */
 139         if (!strncmp(name, "iscsi", 5)) {
 140                 /*
 141                  * Automatically load the LIO Target fabric module when the
 142                  * following is called:
 143                  *
 144                  * mkdir -p $CONFIGFS/target/iscsi
 145                  */
 146                 ret = request_module("iscsi_target_mod");
 147                 if (ret < 0) {
 148                         pr_err("request_module() failed for"
 149                                 " iscsi_target_mod.ko: %d\n", ret);
 150                         return ERR_PTR(-EINVAL);
 151                 }
 152         } else if (!strncmp(name, "loopback", 8)) {
 153                 /*
 154                  * Automatically load the tcm_loop fabric module when the
 155                  * following is called:
 156                  *
 157                  * mkdir -p $CONFIGFS/target/loopback
 158                  */
 159                 ret = request_module("tcm_loop");
 160                 if (ret < 0) {
 161                         pr_err("request_module() failed for"
 162                                 " tcm_loop.ko: %d\n", ret);
 163                         return ERR_PTR(-EINVAL);
 164                 }
 165         }
 166
 167         tf = target_core_get_fabric(name);
 168         if (!tf) {
 169                 pr_err("target_core_get_fabric() failed for %s\n",
 170                         name);
 171                 return ERR_PTR(-EINVAL);
 172         }
 173         pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
 174                         " %s\n", tf->tf_name);
 175         /*
 176          * On a successful target_core_get_fabric() look, the returned
 177          * struct target_fabric_configfs *tf will contain a usage reference.
 178          */
 179         pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
 180                         &tf->tf_cit_tmpl.tfc_wwn_cit);
 181
 182         tf->tf_group.default_groups = tf->tf_default_groups;
 183         tf->tf_group.default_groups[0] = &tf->tf_disc_group;
 184         tf->tf_group.default_groups[1] = NULL;
 185
 186         config_group_init_type_name(&tf->tf_group, name,
 187                         &tf->tf_cit_tmpl.tfc_wwn_cit);
 188         config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
 189                         &tf->tf_cit_tmpl.tfc_discovery_cit);
 190
 191         pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
 192                         " %s\n", tf->tf_group.cg_item.ci_name);
 193         /*
 194          * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
 195          */
 196         tf->tf_ops.tf_subsys = tf->tf_subsys;
 197         tf->tf_fabric = &tf->tf_group.cg_item;
 198         pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
 199                         " for %s\n", name);
 200
 201         return &tf->tf_group;
 202 }
 203
 204 /*
 205  * Called from struct target_core_group_ops->drop_item()
 206  */
 207 static void target_core_deregister_fabric(
 208         struct config_group *group,
 209         struct config_item *item)
 210 {
 211         struct target_fabric_configfs *tf = container_of(
 212                 to_config_group(item), struct target_fabric_configfs, tf_group);
 213         struct config_group *tf_group;
 214         struct config_item *df_item;
 215         int i;
 216
 217         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
 218                 " tf list\n", config_item_name(item));
 219
 220         pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
 221                         " %s\n", tf->tf_name);
 222         atomic_dec(&tf->tf_access_cnt);
 223
 224         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
 225                         " tf->tf_fabric for %s\n", tf->tf_name);
 226         tf->tf_fabric = NULL;
 227
 228         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
 229                         " %s\n", config_item_name(item));
 230
 231         tf_group = &tf->tf_group;
 232         for (i = 0; tf_group->default_groups[i]; i++) {
 233                 df_item = &tf_group->default_groups[i]->cg_item;
 234                 tf_group->default_groups[i] = NULL;
 235                 config_item_put(df_item);
 236         }
 237         config_item_put(item);
 238 }
 239
 240 static struct configfs_group_operations target_core_fabric_group_ops = {
 241         .make_group     = &target_core_register_fabric,
 242         .drop_item      = &target_core_deregister_fabric,
 243 };
 244
 245 /*
 246  * All item attributes appearing in /sys/kernel/target/ appear here.
 247  */
 248 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
 249         &target_core_item_attr_version,
 250         NULL,
 251 };
 252
 253 /*
 254  * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
 255  */
 256 static struct config_item_type target_core_fabrics_item = {
 257         .ct_item_ops    = &target_core_fabric_item_ops,
 258         .ct_group_ops   = &target_core_fabric_group_ops,
 259         .ct_attrs       = target_core_fabric_item_attrs,
 260         .ct_owner       = THIS_MODULE,
 261 };
 262
 263 static struct configfs_subsystem target_core_fabrics = {
 264         .su_group = {
 265                 .cg_item = {
 266                         .ci_namebuf = "target",
 267                         .ci_type = &target_core_fabrics_item,
 268                 },
 269         },
 270 };
 271
 272 struct configfs_subsystem *target_core_subsystem[] = {
 273         &target_core_fabrics,
 274         NULL,
 275 };
 276
 277 /*##############################################################################
 278 // Start functions called by external Target Fabrics Modules
 279 //############################################################################*/
 280
 281 /*
 282  * First function called by fabric modules to:
 283  *
 284  * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
 285  * 2) Add struct target_fabric_configfs to g_tf_list
 286  * 3) Return struct target_fabric_configfs to fabric module to be passed
 287  *    into target_fabric_configfs_register().
 288  */
 289 struct target_fabric_configfs *target_fabric_configfs_init(
 290         struct module *fabric_mod,
 291         const char *name)
 292 {
 293         struct target_fabric_configfs *tf;
 294
 295         if (!(name)) {
 296                 pr_err("Unable to locate passed fabric name\n");
 297                 return ERR_PTR(-EINVAL);
 298         }
 299         if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
 300                 pr_err("Passed name: %s exceeds TARGET_FABRIC"
 301                         "_NAME_SIZE\n", name);
 302                 return ERR_PTR(-EINVAL);
 303         }
 304
 305         tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
 306         if (!tf)
 307                 return ERR_PTR(-ENOMEM);
 308
 309         INIT_LIST_HEAD(&tf->tf_list);
 310         atomic_set(&tf->tf_access_cnt, 0);
 311         /*
 312          * Setup the default generic struct config_item_type's (cits) in
 313          * struct target_fabric_configfs->tf_cit_tmpl
 314          */
 315         tf->tf_module = fabric_mod;
 316         target_fabric_setup_cits(tf);
 317
 318         tf->tf_subsys = target_core_subsystem[0];
 319         snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
 320
 321         mutex_lock(&g_tf_lock);
 322         list_add_tail(&tf->tf_list, &g_tf_list);
 323         mutex_unlock(&g_tf_lock);
 324
 325         pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
 326                         ">>>>>>>>>>>>>>\n");
 327         pr_debug("Initialized struct target_fabric_configfs: %p for"
 328                         " %s\n", tf, tf->tf_name);
 329         return tf;
 330 }
 331 EXPORT_SYMBOL(target_fabric_configfs_init);
 332
 333 /*
 334  * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
 335  */
 336 void target_fabric_configfs_free(
 337         struct target_fabric_configfs *tf)
 338 {
 339         mutex_lock(&g_tf_lock);
 340         list_del(&tf->tf_list);
 341         mutex_unlock(&g_tf_lock);
 342
 343         kfree(tf);
 344 }
 345 EXPORT_SYMBOL(target_fabric_configfs_free);
 346
 347 /*
 348  * Perform a sanity check of the passed tf->tf_ops before completing
 349  * TCM fabric module registration.
 350  */
 351 static int target_fabric_tf_ops_check(
 352         struct target_fabric_configfs *tf)
 353 {
 354         struct target_core_fabric_ops *tfo = &tf->tf_ops;
 355
 356         if (!tfo->get_fabric_name) {
 357                 pr_err("Missing tfo->get_fabric_name()\n");
 358                 return -EINVAL;
 359         }
 360         if (!tfo->get_fabric_proto_ident) {
 361                 pr_err("Missing tfo->get_fabric_proto_ident()\n");
 362                 return -EINVAL;
 363         }
 364         if (!tfo->tpg_get_wwn) {
 365                 pr_err("Missing tfo->tpg_get_wwn()\n");
 366                 return -EINVAL;
 367         }
 368         if (!tfo->tpg_get_tag) {
 369                 pr_err("Missing tfo->tpg_get_tag()\n");
 370                 return -EINVAL;
 371         }
 372         if (!tfo->tpg_get_default_depth) {
 373                 pr_err("Missing tfo->tpg_get_default_depth()\n");
 374                 return -EINVAL;
 375         }
 376         if (!tfo->tpg_get_pr_transport_id) {
 377                 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
 378                 return -EINVAL;
 379         }
 380         if (!tfo->tpg_get_pr_transport_id_len) {
 381                 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
 382                 return -EINVAL;
 383         }
 384         if (!tfo->tpg_check_demo_mode) {
 385                 pr_err("Missing tfo->tpg_check_demo_mode()\n");
 386                 return -EINVAL;
 387         }
 388         if (!tfo->tpg_check_demo_mode_cache) {
 389                 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
 390                 return -EINVAL;
 391         }
 392         if (!tfo->tpg_check_demo_mode_write_protect) {
 393                 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
 394                 return -EINVAL;
 395         }
 396         if (!tfo->tpg_check_prod_mode_write_protect) {
 397                 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
 398                 return -EINVAL;
 399         }
 400         if (!tfo->tpg_alloc_fabric_acl) {
 401                 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
 402                 return -EINVAL;
 403         }
 404         if (!tfo->tpg_release_fabric_acl) {
 405                 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
 406                 return -EINVAL;
 407         }
 408         if (!tfo->tpg_get_inst_index) {
 409                 pr_err("Missing tfo->tpg_get_inst_index()\n");
 410                 return -EINVAL;
 411         }
 412         if (!tfo->release_cmd) {
 413                 pr_err("Missing tfo->release_cmd()\n");
 414                 return -EINVAL;
 415         }
 416         if (!tfo->shutdown_session) {
 417                 pr_err("Missing tfo->shutdown_session()\n");
 418                 return -EINVAL;
 419         }
 420         if (!tfo->close_session) {
 421                 pr_err("Missing tfo->close_session()\n");
 422                 return -EINVAL;
 423         }
 424         if (!tfo->sess_get_index) {
 425                 pr_err("Missing tfo->sess_get_index()\n");
 426                 return -EINVAL;
 427         }
 428         if (!tfo->write_pending) {
 429                 pr_err("Missing tfo->write_pending()\n");
 430                 return -EINVAL;
 431         }
 432         if (!tfo->write_pending_status) {
 433                 pr_err("Missing tfo->write_pending_status()\n");
 434                 return -EINVAL;
 435         }
 436         if (!tfo->set_default_node_attributes) {
 437                 pr_err("Missing tfo->set_default_node_attributes()\n");
 438                 return -EINVAL;
 439         }
 440         if (!tfo->get_task_tag) {
 441                 pr_err("Missing tfo->get_task_tag()\n");
 442                 return -EINVAL;
 443         }
 444         if (!tfo->get_cmd_state) {
 445                 pr_err("Missing tfo->get_cmd_state()\n");
 446                 return -EINVAL;
 447         }
 448         if (!tfo->queue_data_in) {
 449                 pr_err("Missing tfo->queue_data_in()\n");
 450                 return -EINVAL;
 451         }
 452         if (!tfo->queue_status) {
 453                 pr_err("Missing tfo->queue_status()\n");
 454                 return -EINVAL;
 455         }
 456         if (!tfo->queue_tm_rsp) {
 457                 pr_err("Missing tfo->queue_tm_rsp()\n");
 458                 return -EINVAL;
 459         }
 460         if (!tfo->aborted_task) {
 461                 pr_err("Missing tfo->aborted_task()\n");
 462                 return -EINVAL;
 463         }
 464         /*
 465          * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
 466          * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
 467          * target_core_fabric_configfs.c WWN+TPG group context code.
 468          */
 469         if (!tfo->fabric_make_wwn) {
 470                 pr_err("Missing tfo->fabric_make_wwn()\n");
 471                 return -EINVAL;
 472         }
 473         if (!tfo->fabric_drop_wwn) {
 474                 pr_err("Missing tfo->fabric_drop_wwn()\n");
 475                 return -EINVAL;
 476         }
 477         if (!tfo->fabric_make_tpg) {
 478                 pr_err("Missing tfo->fabric_make_tpg()\n");
 479                 return -EINVAL;
 480         }
 481         if (!tfo->fabric_drop_tpg) {
 482                 pr_err("Missing tfo->fabric_drop_tpg()\n");
 483                 return -EINVAL;
 484         }
 485
 486         return 0;
 487 }
 488
 489 /*
 490  * Called 2nd from fabric module with returned parameter of
 491  * struct target_fabric_configfs * from target_fabric_configfs_init().
 492  *
 493  * Upon a successful registration, the new fabric's struct config_item is
 494  * return.  Also, a pointer to this struct is set in the passed
 495  * struct target_fabric_configfs.
 496  */
 497 int target_fabric_configfs_register(
 498         struct target_fabric_configfs *tf)
 499 {
 500         int ret;
 501
 502         if (!tf) {
 503                 pr_err("Unable to locate target_fabric_configfs"
 504                         " pointer\n");
 505                 return -EINVAL;
 506         }
 507         if (!tf->tf_subsys) {
 508                 pr_err("Unable to target struct config_subsystem"
 509                         " pointer\n");
 510                 return -EINVAL;
 511         }
 512         ret = target_fabric_tf_ops_check(tf);
 513         if (ret < 0)
 514                 return ret;
 515
 516         pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
 517                 ">>>>>>>>>>\n");
 518         return 0;
 519 }
 520 EXPORT_SYMBOL(target_fabric_configfs_register);
 521
 522 void target_fabric_configfs_deregister(
 523         struct target_fabric_configfs *tf)
 524 {
 525         struct configfs_subsystem *su;
 526
 527         if (!tf) {
 528                 pr_err("Unable to locate passed target_fabric_"
 529                         "configfs\n");
 530                 return;
 531         }
 532         su = tf->tf_subsys;
 533         if (!su) {
 534                 pr_err("Unable to locate passed tf->tf_subsys"
 535                         " pointer\n");
 536                 return;
 537         }
 538         pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
 539                         ">>>>>>>>>>>>\n");
 540         mutex_lock(&g_tf_lock);
 541         if (atomic_read(&tf->tf_access_cnt)) {
 542                 mutex_unlock(&g_tf_lock);
 543                 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
 544                         tf->tf_name);
 545                 BUG();
 546         }
 547         list_del(&tf->tf_list);
 548         mutex_unlock(&g_tf_lock);
 549
 550         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
 551                         " %s\n", tf->tf_name);
 552         tf->tf_module = NULL;
 553         tf->tf_subsys = NULL;
 554         kfree(tf);
 555
 556         pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
 557                         ">>>>>\n");
 558 }
 559 EXPORT_SYMBOL(target_fabric_configfs_deregister);
 560
 561 /*##############################################################################
 562 // Stop functions called by external Target Fabrics Modules
 563 //############################################################################*/
 564
 565 /* Start functions for struct config_item_type target_core_dev_attrib_cit */
 566
 567 #define DEF_DEV_ATTRIB_SHOW(_name)                                      \
 568 static ssize_t target_core_dev_show_attr_##_name(                       \
 569         struct se_dev_attrib *da,                                       \
 570         char *page)                                                     \
 571 {                                                                       \
 572         return snprintf(page, PAGE_SIZE, "%u\n",                        \
 573                 (u32)da->da_dev->dev_attrib._name);                     \
 574 }
 575
 576 #define DEF_DEV_ATTRIB_STORE(_name)                                     \
 577 static ssize_t target_core_dev_store_attr_##_name(                      \
 578         struct se_dev_attrib *da,                                       \
 579         const char *page,                                               \
 580         size_t count)                                                   \
 581 {                                                                       \
 582         unsigned long val;                                              \
 583         int ret;                                                        \
 584                                                                         \
 585         ret = kstrtoul(page, 0, &val);                          \
 586         if (ret < 0) {                                                  \
 587                 pr_err("kstrtoul() failed with"         \
 588                         " ret: %d\n", ret);                             \
 589                 return -EINVAL;                                         \
 590         }                                                               \
 591         ret = se_dev_set_##_name(da->da_dev, (u32)val);                 \
 592                                                                         \
 593         return (!ret) ? count : -EINVAL;                                \
 594 }
 595
 596 #define DEF_DEV_ATTRIB(_name)                                           \
 597 DEF_DEV_ATTRIB_SHOW(_name);                                             \
 598 DEF_DEV_ATTRIB_STORE(_name);
 599
 600 #define DEF_DEV_ATTRIB_RO(_name)                                        \
 601 DEF_DEV_ATTRIB_SHOW(_name);
 602
 603 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
 604 #define SE_DEV_ATTR(_name, _mode)                                       \
 605 static struct target_core_dev_attrib_attribute                          \
 606                         target_core_dev_attrib_##_name =                \
 607                 __CONFIGFS_EATTR(_name, _mode,                          \
 608                 target_core_dev_show_attr_##_name,                      \
 609                 target_core_dev_store_attr_##_name);
 610
 611 #define SE_DEV_ATTR_RO(_name);                                          \
 612 static struct target_core_dev_attrib_attribute                          \
 613                         target_core_dev_attrib_##_name =                \
 614         __CONFIGFS_EATTR_RO(_name,                                      \
 615         target_core_dev_show_attr_##_name);
 616
 617 DEF_DEV_ATTRIB(emulate_model_alias);
 618 SE_DEV_ATTR(emulate_model_alias, S_IRUGO | S_IWUSR);
 619
 620 DEF_DEV_ATTRIB(emulate_dpo);
 621 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
 622
 623 DEF_DEV_ATTRIB(emulate_fua_write);
 624 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
 625
 626 DEF_DEV_ATTRIB(emulate_fua_read);
 627 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
 628
 629 DEF_DEV_ATTRIB(emulate_write_cache);
 630 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
 631
 632 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
 633 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
 634
 635 DEF_DEV_ATTRIB(emulate_tas);
 636 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
 637
 638 DEF_DEV_ATTRIB(emulate_tpu);
 639 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
 640
 641 DEF_DEV_ATTRIB(emulate_tpws);
 642 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
 643
 644 DEF_DEV_ATTRIB(emulate_caw);
 645 SE_DEV_ATTR(emulate_caw, S_IRUGO | S_IWUSR);
 646
 647 DEF_DEV_ATTRIB(emulate_3pc);
 648 SE_DEV_ATTR(emulate_3pc, S_IRUGO | S_IWUSR);
 649
 650 DEF_DEV_ATTRIB(pi_prot_type);
 651 SE_DEV_ATTR(pi_prot_type, S_IRUGO | S_IWUSR);
 652
 653 DEF_DEV_ATTRIB_RO(hw_pi_prot_type);
 654 SE_DEV_ATTR_RO(hw_pi_prot_type);
 655
 656 DEF_DEV_ATTRIB(pi_prot_format);
 657 SE_DEV_ATTR(pi_prot_format, S_IRUGO | S_IWUSR);
 658
 659 DEF_DEV_ATTRIB(enforce_pr_isids);
 660 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
 661
 662 DEF_DEV_ATTRIB(is_nonrot);
 663 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
 664
 665 DEF_DEV_ATTRIB(emulate_rest_reord);
 666 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
 667
 668 DEF_DEV_ATTRIB_RO(hw_block_size);
 669 SE_DEV_ATTR_RO(hw_block_size);
 670
 671 DEF_DEV_ATTRIB(block_size);
 672 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
 673
 674 DEF_DEV_ATTRIB_RO(hw_max_sectors);
 675 SE_DEV_ATTR_RO(hw_max_sectors);
 676
 677 DEF_DEV_ATTRIB(fabric_max_sectors);
 678 SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR);
 679
 680 DEF_DEV_ATTRIB(optimal_sectors);
 681 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
 682
 683 DEF_DEV_ATTRIB_RO(hw_queue_depth);
 684 SE_DEV_ATTR_RO(hw_queue_depth);
 685
 686 DEF_DEV_ATTRIB(queue_depth);
 687 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
 688
 689 DEF_DEV_ATTRIB(max_unmap_lba_count);
 690 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
 691
 692 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
 693 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
 694
 695 DEF_DEV_ATTRIB(unmap_granularity);
 696 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
 697
 698 DEF_DEV_ATTRIB(unmap_granularity_alignment);
 699 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
 700
 701 DEF_DEV_ATTRIB(max_write_same_len);
 702 SE_DEV_ATTR(max_write_same_len, S_IRUGO | S_IWUSR);
 703
 704 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
 705
 706 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
 707         &target_core_dev_attrib_emulate_model_alias.attr,
 708         &target_core_dev_attrib_emulate_dpo.attr,
 709         &target_core_dev_attrib_emulate_fua_write.attr,
 710         &target_core_dev_attrib_emulate_fua_read.attr,
 711         &target_core_dev_attrib_emulate_write_cache.attr,
 712         &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
 713         &target_core_dev_attrib_emulate_tas.attr,
 714         &target_core_dev_attrib_emulate_tpu.attr,
 715         &target_core_dev_attrib_emulate_tpws.attr,
 716         &target_core_dev_attrib_emulate_caw.attr,
 717         &target_core_dev_attrib_emulate_3pc.attr,
 718         &target_core_dev_attrib_pi_prot_type.attr,
 719         &target_core_dev_attrib_hw_pi_prot_type.attr,
 720         &target_core_dev_attrib_pi_prot_format.attr,
 721         &target_core_dev_attrib_enforce_pr_isids.attr,
 722         &target_core_dev_attrib_is_nonrot.attr,
 723         &target_core_dev_attrib_emulate_rest_reord.attr,
 724         &target_core_dev_attrib_hw_block_size.attr,
 725         &target_core_dev_attrib_block_size.attr,
 726         &target_core_dev_attrib_hw_max_sectors.attr,
 727         &target_core_dev_attrib_fabric_max_sectors.attr,
 728         &target_core_dev_attrib_optimal_sectors.attr,
 729         &target_core_dev_attrib_hw_queue_depth.attr,
 730         &target_core_dev_attrib_queue_depth.attr,
 731         &target_core_dev_attrib_max_unmap_lba_count.attr,
 732         &target_core_dev_attrib_max_unmap_block_desc_count.attr,
 733         &target_core_dev_attrib_unmap_granularity.attr,
 734         &target_core_dev_attrib_unmap_granularity_alignment.attr,
 735         &target_core_dev_attrib_max_write_same_len.attr,
 736         NULL,
 737 };
 738
 739 static struct configfs_item_operations target_core_dev_attrib_ops = {
 740         .show_attribute         = target_core_dev_attrib_attr_show,
 741         .store_attribute        = target_core_dev_attrib_attr_store,
 742 };
 743
 744 static struct config_item_type target_core_dev_attrib_cit = {
 745         .ct_item_ops            = &target_core_dev_attrib_ops,
 746         .ct_attrs               = target_core_dev_attrib_attrs,
 747         .ct_owner               = THIS_MODULE,
 748 };
 749
 750 /* End functions for struct config_item_type target_core_dev_attrib_cit */
 751
 752 /*  Start functions for struct config_item_type target_core_dev_wwn_cit */
 753
 754 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
 755 #define SE_DEV_WWN_ATTR(_name, _mode)                                   \
 756 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
 757                 __CONFIGFS_EATTR(_name, _mode,                          \
 758                 target_core_dev_wwn_show_attr_##_name,                  \
 759                 target_core_dev_wwn_store_attr_##_name);
 760
 761 #define SE_DEV_WWN_ATTR_RO(_name);                                      \
 762 do {                                                                    \
 763         static struct target_core_dev_wwn_attribute                     \
 764                         target_core_dev_wwn_##_name =                   \
 765                 __CONFIGFS_EATTR_RO(_name,                              \
 766                 target_core_dev_wwn_show_attr_##_name);                 \
 767 } while (0);
 768
 769 /*
 770  * VPD page 0x80 Unit serial
 771  */
 772 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
 773         struct t10_wwn *t10_wwn,
 774         char *page)
 775 {
 776         return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
 777                 &t10_wwn->unit_serial[0]);
 778 }
 779
 780 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
 781         struct t10_wwn *t10_wwn,
 782         const char *page,
 783         size_t count)
 784 {
 785         struct se_device *dev = t10_wwn->t10_dev;
 786         unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
 787
 788         /*
 789          * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
 790          * from the struct scsi_device level firmware, do not allow
 791          * VPD Unit Serial to be emulated.
 792          *
 793          * Note this struct scsi_device could also be emulating VPD
 794          * information from its drivers/scsi LLD.  But for now we assume
 795          * it is doing 'the right thing' wrt a world wide unique
 796          * VPD Unit Serial Number that OS dependent multipath can depend on.
 797          */
 798         if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
 799                 pr_err("Underlying SCSI device firmware provided VPD"
 800                         " Unit Serial, ignoring request\n");
 801                 return -EOPNOTSUPP;
 802         }
 803
 804         if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
 805                 pr_err("Emulated VPD Unit Serial exceeds"
 806                 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
 807                 return -EOVERFLOW;
 808         }
 809         /*
 810          * Check to see if any active $FABRIC_MOD exports exist.  If they
 811          * do exist, fail here as changing this information on the fly
 812          * (underneath the initiator side OS dependent multipath code)
 813          * could cause negative effects.
 814          */
 815         if (dev->export_count) {
 816                 pr_err("Unable to set VPD Unit Serial while"
 817                         " active %d $FABRIC_MOD exports exist\n",
 818                         dev->export_count);
 819                 return -EINVAL;
 820         }
 821
 822         /*
 823          * This currently assumes ASCII encoding for emulated VPD Unit Serial.
 824          *
 825          * Also, strip any newline added from the userspace
 826          * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
 827          */
 828         memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
 829         snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
 830         snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
 831                         "%s", strstrip(buf));
 832         dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
 833
 834         pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
 835                         " %s\n", dev->t10_wwn.unit_serial);
 836
 837         return count;
 838 }
 839
 840 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
 841
 842 /*
 843  * VPD page 0x83 Protocol Identifier
 844  */
 845 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
 846         struct t10_wwn *t10_wwn,
 847         char *page)
 848 {
 849         struct t10_vpd *vpd;
 850         unsigned char buf[VPD_TMP_BUF_SIZE];
 851         ssize_t len = 0;
 852
 853         memset(buf, 0, VPD_TMP_BUF_SIZE);
 854
 855         spin_lock(&t10_wwn->t10_vpd_lock);
 856         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
 857                 if (!vpd->protocol_identifier_set)
 858                         continue;
 859
 860                 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
 861
 862                 if (len + strlen(buf) >= PAGE_SIZE)
 863                         break;
 864
 865                 len += sprintf(page+len, "%s", buf);
 866         }
 867         spin_unlock(&t10_wwn->t10_vpd_lock);
 868
 869         return len;
 870 }
 871
 872 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
 873         struct t10_wwn *t10_wwn,
 874         const char *page,
 875         size_t count)
 876 {
 877         return -ENOSYS;
 878 }
 879
 880 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
 881
 882 /*
 883  * Generic wrapper for dumping VPD identifiers by association.
 884  */
 885 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc)                           \
 886 static ssize_t target_core_dev_wwn_show_attr_##_name(                   \
 887         struct t10_wwn *t10_wwn,                                        \
 888         char *page)                                                     \
 889 {                                                                       \
 890         struct t10_vpd *vpd;                                                    \
 891         unsigned char buf[VPD_TMP_BUF_SIZE];                            \
 892         ssize_t len = 0;                                                \
 893                                                                         \
 894         spin_lock(&t10_wwn->t10_vpd_lock);                              \
 895         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {    \
 896                 if (vpd->association != _assoc)                         \
 897                         continue;                                       \
 898                                                                         \
 899                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 900                 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE);   \
 901                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 902                         break;                                          \
 903                 len += sprintf(page+len, "%s", buf);                    \
 904                                                                         \
 905                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 906                 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
 907                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 908                         break;                                          \
 909                 len += sprintf(page+len, "%s", buf);                    \
 910                                                                         \
 911                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 912                 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
 913                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 914                         break;                                          \
 915                 len += sprintf(page+len, "%s", buf);                    \
 916         }                                                               \
 917         spin_unlock(&t10_wwn->t10_vpd_lock);                            \
 918                                                                         \
 919         return len;                                                     \
 920 }
 921
 922 /*
 923  * VPD page 0x83 Association: Logical Unit
 924  */
 925 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
 926
 927 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
 928         struct t10_wwn *t10_wwn,
 929         const char *page,
 930         size_t count)
 931 {
 932         return -ENOSYS;
 933 }
 934
 935 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
 936
 937 /*
 938  * VPD page 0x83 Association: Target Port
 939  */
 940 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
 941
 942 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
 943         struct t10_wwn *t10_wwn,
 944         const char *page,
 945         size_t count)
 946 {
 947         return -ENOSYS;
 948 }
 949
 950 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
 951
 952 /*
 953  * VPD page 0x83 Association: SCSI Target Device
 954  */
 955 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
 956
 957 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
 958         struct t10_wwn *t10_wwn,
 959         const char *page,
 960         size_t count)
 961 {
 962         return -ENOSYS;
 963 }
 964
 965 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
 966
 967 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
 968
 969 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
 970         &target_core_dev_wwn_vpd_unit_serial.attr,
 971         &target_core_dev_wwn_vpd_protocol_identifier.attr,
 972         &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
 973         &target_core_dev_wwn_vpd_assoc_target_port.attr,
 974         &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
 975         NULL,
 976 };
 977
 978 static struct configfs_item_operations target_core_dev_wwn_ops = {
 979         .show_attribute         = target_core_dev_wwn_attr_show,
 980         .store_attribute        = target_core_dev_wwn_attr_store,
 981 };
 982
 983 static struct config_item_type target_core_dev_wwn_cit = {
 984         .ct_item_ops            = &target_core_dev_wwn_ops,
 985         .ct_attrs               = target_core_dev_wwn_attrs,
 986         .ct_owner               = THIS_MODULE,
 987 };
 988
 989 /*  End functions for struct config_item_type target_core_dev_wwn_cit */
 990
 991 /*  Start functions for struct config_item_type target_core_dev_pr_cit */
 992
 993 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
 994 #define SE_DEV_PR_ATTR(_name, _mode)                                    \
 995 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
 996         __CONFIGFS_EATTR(_name, _mode,                                  \
 997         target_core_dev_pr_show_attr_##_name,                           \
 998         target_core_dev_pr_store_attr_##_name);
 999
1000 #define SE_DEV_PR_ATTR_RO(_name);                                       \
1001 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1002         __CONFIGFS_EATTR_RO(_name,                                      \
1003         target_core_dev_pr_show_attr_##_name);
1004
1005 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1006                 char *page)
1007 {
1008         struct se_node_acl *se_nacl;
1009         struct t10_pr_registration *pr_reg;
1010         char i_buf[PR_REG_ISID_ID_LEN];
1011
1012         memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1013
1014         pr_reg = dev->dev_pr_res_holder;
1015         if (!pr_reg)
1016                 return sprintf(page, "No SPC-3 Reservation holder\n");
1017
1018         se_nacl = pr_reg->pr_reg_nacl;
1019         core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1020
1021         return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1022                 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1023                 se_nacl->initiatorname, i_buf);
1024 }
1025
1026 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1027                 char *page)
1028 {
1029         struct se_node_acl *se_nacl;
1030         ssize_t len;
1031
1032         se_nacl = dev->dev_reserved_node_acl;
1033         if (se_nacl) {
1034                 len = sprintf(page,
1035                               "SPC-2 Reservation: %s Initiator: %s\n",
1036                               se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1037                               se_nacl->initiatorname);
1038         } else {
1039                 len = sprintf(page, "No SPC-2 Reservation holder\n");
1040         }
1041         return len;
1042 }
1043
1044 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
1045                 char *page)
1046 {
1047         int ret;
1048
1049         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1050                 return sprintf(page, "Passthrough\n");
1051
1052         spin_lock(&dev->dev_reservation_lock);
1053         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1054                 ret = target_core_dev_pr_show_spc2_res(dev, page);
1055         else
1056                 ret = target_core_dev_pr_show_spc3_res(dev, page);
1057         spin_unlock(&dev->dev_reservation_lock);
1058         return ret;
1059 }
1060
1061 SE_DEV_PR_ATTR_RO(res_holder);
1062
1063 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1064                 struct se_device *dev, char *page)
1065 {
1066         ssize_t len = 0;
1067
1068         spin_lock(&dev->dev_reservation_lock);
1069         if (!dev->dev_pr_res_holder) {
1070                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1071         } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1072                 len = sprintf(page, "SPC-3 Reservation: All Target"
1073                         " Ports registration\n");
1074         } else {
1075                 len = sprintf(page, "SPC-3 Reservation: Single"
1076                         " Target Port registration\n");
1077         }
1078
1079         spin_unlock(&dev->dev_reservation_lock);
1080         return len;
1081 }
1082
1083 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1084
1085 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1086                 struct se_device *dev, char *page)
1087 {
1088         return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
1089 }
1090
1091 SE_DEV_PR_ATTR_RO(res_pr_generation);
1092
1093 /*
1094  * res_pr_holder_tg_port
1095  */
1096 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1097                 struct se_device *dev, char *page)
1098 {
1099         struct se_node_acl *se_nacl;
1100         struct se_lun *lun;
1101         struct se_portal_group *se_tpg;
1102         struct t10_pr_registration *pr_reg;
1103         struct target_core_fabric_ops *tfo;
1104         ssize_t len = 0;
1105
1106         spin_lock(&dev->dev_reservation_lock);
1107         pr_reg = dev->dev_pr_res_holder;
1108         if (!pr_reg) {
1109                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1110                 goto out_unlock;
1111         }
1112
1113         se_nacl = pr_reg->pr_reg_nacl;
1114         se_tpg = se_nacl->se_tpg;
1115         lun = pr_reg->pr_reg_tg_pt_lun;
1116         tfo = se_tpg->se_tpg_tfo;
1117
1118         len += sprintf(page+len, "SPC-3 Reservation: %s"
1119                 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1120                 tfo->tpg_get_wwn(se_tpg));
1121         len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1122                 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1123                 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1124                 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1125                 tfo->get_fabric_name(), lun->unpacked_lun);
1126
1127 out_unlock:
1128         spin_unlock(&dev->dev_reservation_lock);
1129         return len;
1130 }
1131
1132 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1133
1134 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1135                 struct se_device *dev, char *page)
1136 {
1137         struct target_core_fabric_ops *tfo;
1138         struct t10_pr_registration *pr_reg;
1139         unsigned char buf[384];
1140         char i_buf[PR_REG_ISID_ID_LEN];
1141         ssize_t len = 0;
1142         int reg_count = 0;
1143
1144         len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1145
1146         spin_lock(&dev->t10_pr.registration_lock);
1147         list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1148                         pr_reg_list) {
1149
1150                 memset(buf, 0, 384);
1151                 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1152                 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1153                 core_pr_dump_initiator_port(pr_reg, i_buf,
1154                                         PR_REG_ISID_ID_LEN);
1155                 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1156                         tfo->get_fabric_name(),
1157                         pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1158                         pr_reg->pr_res_generation);
1159
1160                 if (len + strlen(buf) >= PAGE_SIZE)
1161                         break;
1162
1163                 len += sprintf(page+len, "%s", buf);
1164                 reg_count++;
1165         }
1166         spin_unlock(&dev->t10_pr.registration_lock);
1167
1168         if (!reg_count)
1169                 len += sprintf(page+len, "None\n");
1170
1171         return len;
1172 }
1173
1174 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1175
1176 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1177                 struct se_device *dev, char *page)
1178 {
1179         struct t10_pr_registration *pr_reg;
1180         ssize_t len = 0;
1181
1182         spin_lock(&dev->dev_reservation_lock);
1183         pr_reg = dev->dev_pr_res_holder;
1184         if (pr_reg) {
1185                 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1186                         core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1187         } else {
1188                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1189         }
1190
1191         spin_unlock(&dev->dev_reservation_lock);
1192         return len;
1193 }
1194
1195 SE_DEV_PR_ATTR_RO(res_pr_type);
1196
1197 static ssize_t target_core_dev_pr_show_attr_res_type(
1198                 struct se_device *dev, char *page)
1199 {
1200         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1201                 return sprintf(page, "SPC_PASSTHROUGH\n");
1202         else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1203                 return sprintf(page, "SPC2_RESERVATIONS\n");
1204         else
1205                 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1206 }
1207
1208 SE_DEV_PR_ATTR_RO(res_type);
1209
1210 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1211                 struct se_device *dev, char *page)
1212 {
1213         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1214                 return 0;
1215
1216         return sprintf(page, "APTPL Bit Status: %s\n",
1217                 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1218 }
1219
1220 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1221
1222 /*
1223  * res_aptpl_metadata
1224  */
1225 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1226                 struct se_device *dev, char *page)
1227 {
1228         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1229                 return 0;
1230
1231         return sprintf(page, "Ready to process PR APTPL metadata..\n");
1232 }
1233
1234 enum {
1235         Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1236         Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1237         Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1238         Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1239 };
1240
1241 static match_table_t tokens = {
1242         {Opt_initiator_fabric, "initiator_fabric=%s"},
1243         {Opt_initiator_node, "initiator_node=%s"},
1244         {Opt_initiator_sid, "initiator_sid=%s"},
1245         {Opt_sa_res_key, "sa_res_key=%s"},
1246         {Opt_res_holder, "res_holder=%d"},
1247         {Opt_res_type, "res_type=%d"},
1248         {Opt_res_scope, "res_scope=%d"},
1249         {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1250         {Opt_mapped_lun, "mapped_lun=%d"},
1251         {Opt_target_fabric, "target_fabric=%s"},
1252         {Opt_target_node, "target_node=%s"},
1253         {Opt_tpgt, "tpgt=%d"},
1254         {Opt_port_rtpi, "port_rtpi=%d"},
1255         {Opt_target_lun, "target_lun=%d"},
1256         {Opt_err, NULL}
1257 };
1258
1259 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1260         struct se_device *dev,
1261         const char *page,
1262         size_t count)
1263 {
1264         unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1265         unsigned char *t_fabric = NULL, *t_port = NULL;
1266         char *orig, *ptr, *arg_p, *opts;
1267         substring_t args[MAX_OPT_ARGS];
1268         unsigned long long tmp_ll;
1269         u64 sa_res_key = 0;
1270         u32 mapped_lun = 0, target_lun = 0;
1271         int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1272         u16 port_rpti = 0, tpgt = 0;
1273         u8 type = 0, scope;
1274
1275         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1276                 return 0;
1277         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1278                 return 0;
1279
1280         if (dev->export_count) {
1281                 pr_debug("Unable to process APTPL metadata while"
1282                         " active fabric exports exist\n");
1283                 return -EINVAL;
1284         }
1285
1286         opts = kstrdup(page, GFP_KERNEL);
1287         if (!opts)
1288                 return -ENOMEM;
1289
1290         orig = opts;
1291         while ((ptr = strsep(&opts, ",\n")) != NULL) {
1292                 if (!*ptr)
1293                         continue;
1294
1295                 token = match_token(ptr, tokens, args);
1296                 switch (token) {
1297                 case Opt_initiator_fabric:
1298                         i_fabric = match_strdup(&args[0]);
1299                         if (!i_fabric) {
1300                                 ret = -ENOMEM;
1301                                 goto out;
1302                         }
1303                         break;
1304                 case Opt_initiator_node:
1305                         i_port = match_strdup(&args[0]);
1306                         if (!i_port) {
1307                                 ret = -ENOMEM;
1308                                 goto out;
1309                         }
1310                         if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1311                                 pr_err("APTPL metadata initiator_node="
1312                                         " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1313                                         PR_APTPL_MAX_IPORT_LEN);
1314                                 ret = -EINVAL;
1315                                 break;
1316                         }
1317                         break;
1318                 case Opt_initiator_sid:
1319                         isid = match_strdup(&args[0]);
1320                         if (!isid) {
1321                                 ret = -ENOMEM;
1322                                 goto out;
1323                         }
1324                         if (strlen(isid) >= PR_REG_ISID_LEN) {
1325                                 pr_err("APTPL metadata initiator_isid"
1326                                         "= exceeds PR_REG_ISID_LEN: %d\n",
1327                                         PR_REG_ISID_LEN);
1328                                 ret = -EINVAL;
1329                                 break;
1330                         }
1331                         break;
1332                 case Opt_sa_res_key:
1333                         arg_p = match_strdup(&args[0]);
1334                         if (!arg_p) {
1335                                 ret = -ENOMEM;
1336                                 goto out;
1337                         }
1338                         ret = kstrtoull(arg_p, 0, &tmp_ll);
1339                         if (ret < 0) {
1340                                 pr_err("kstrtoull() failed for"
1341                                         " sa_res_key=\n");
1342                                 goto out;
1343                         }
1344                         sa_res_key = (u64)tmp_ll;
1345                         break;
1346                 /*
1347                  * PR APTPL Metadata for Reservation
1348                  */
1349                 case Opt_res_holder:
1350                         match_int(args, &arg);
1351                         res_holder = arg;
1352                         break;
1353                 case Opt_res_type:
1354                         match_int(args, &arg);
1355                         type = (u8)arg;
1356                         break;
1357                 case Opt_res_scope:
1358                         match_int(args, &arg);
1359                         scope = (u8)arg;
1360                         break;
1361                 case Opt_res_all_tg_pt:
1362                         match_int(args, &arg);
1363                         all_tg_pt = (int)arg;
1364                         break;
1365                 case Opt_mapped_lun:
1366                         match_int(args, &arg);
1367                         mapped_lun = (u32)arg;
1368                         break;
1369                 /*
1370                  * PR APTPL Metadata for Target Port
1371                  */
1372                 case Opt_target_fabric:
1373                         t_fabric = match_strdup(&args[0]);
1374                         if (!t_fabric) {
1375                                 ret = -ENOMEM;
1376                                 goto out;
1377                         }
1378                         break;
1379                 case Opt_target_node:
1380                         t_port = match_strdup(&args[0]);
1381                         if (!t_port) {
1382                                 ret = -ENOMEM;
1383                                 goto out;
1384                         }
1385                         if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1386                                 pr_err("APTPL metadata target_node="
1387                                         " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1388                                         PR_APTPL_MAX_TPORT_LEN);
1389                                 ret = -EINVAL;
1390                                 break;
1391                         }
1392                         break;
1393                 case Opt_tpgt:
1394                         match_int(args, &arg);
1395                         tpgt = (u16)arg;
1396                         break;
1397                 case Opt_port_rtpi:
1398                         match_int(args, &arg);
1399                         port_rpti = (u16)arg;
1400                         break;
1401                 case Opt_target_lun:
1402                         match_int(args, &arg);
1403                         target_lun = (u32)arg;
1404                         break;
1405                 default:
1406                         break;
1407                 }
1408         }
1409
1410         if (!i_port || !t_port || !sa_res_key) {
1411                 pr_err("Illegal parameters for APTPL registration\n");
1412                 ret = -EINVAL;
1413                 goto out;
1414         }
1415
1416         if (res_holder && !(type)) {
1417                 pr_err("Illegal PR type: 0x%02x for reservation"
1418                                 " holder\n", type);
1419                 ret = -EINVAL;
1420                 goto out;
1421         }
1422
1423         ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1424                         i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1425                         res_holder, all_tg_pt, type);
1426 out:
1427         kfree(i_fabric);
1428         kfree(i_port);
1429         kfree(isid);
1430         kfree(t_fabric);
1431         kfree(t_port);
1432         kfree(orig);
1433         return (ret == 0) ? count : ret;
1434 }
1435
1436 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1437
1438 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
1439
1440 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1441         &target_core_dev_pr_res_holder.attr,
1442         &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1443         &target_core_dev_pr_res_pr_generation.attr,
1444         &target_core_dev_pr_res_pr_holder_tg_port.attr,
1445         &target_core_dev_pr_res_pr_registered_i_pts.attr,
1446         &target_core_dev_pr_res_pr_type.attr,
1447         &target_core_dev_pr_res_type.attr,
1448         &target_core_dev_pr_res_aptpl_active.attr,
1449         &target_core_dev_pr_res_aptpl_metadata.attr,
1450         NULL,
1451 };
1452
1453 static struct configfs_item_operations target_core_dev_pr_ops = {
1454         .show_attribute         = target_core_dev_pr_attr_show,
1455         .store_attribute        = target_core_dev_pr_attr_store,
1456 };
1457
1458 static struct config_item_type target_core_dev_pr_cit = {
1459         .ct_item_ops            = &target_core_dev_pr_ops,
1460         .ct_attrs               = target_core_dev_pr_attrs,
1461         .ct_owner               = THIS_MODULE,
1462 };
1463
1464 /*  End functions for struct config_item_type target_core_dev_pr_cit */
1465
1466 /*  Start functions for struct config_item_type target_core_dev_cit */
1467
1468 static ssize_t target_core_show_dev_info(void *p, char *page)
1469 {
1470         struct se_device *dev = p;
1471         struct se_subsystem_api *t = dev->transport;
1472         int bl = 0;
1473         ssize_t read_bytes = 0;
1474
1475         transport_dump_dev_state(dev, page, &bl);
1476         read_bytes += bl;
1477         read_bytes += t->show_configfs_dev_params(dev, page+read_bytes);
1478         return read_bytes;
1479 }
1480
1481 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1482         .attr   = { .ca_owner = THIS_MODULE,
1483                     .ca_name = "info",
1484                     .ca_mode = S_IRUGO },
1485         .show   = target_core_show_dev_info,
1486         .store  = NULL,
1487 };
1488
1489 static ssize_t target_core_store_dev_control(
1490         void *p,
1491         const char *page,
1492         size_t count)
1493 {
1494         struct se_device *dev = p;
1495         struct se_subsystem_api *t = dev->transport;
1496
1497         return t->set_configfs_dev_params(dev, page, count);
1498 }
1499
1500 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1501         .attr   = { .ca_owner = THIS_MODULE,
1502                     .ca_name = "control",
1503                     .ca_mode = S_IWUSR },
1504         .show   = NULL,
1505         .store  = target_core_store_dev_control,
1506 };
1507
1508 static ssize_t target_core_show_dev_alias(void *p, char *page)
1509 {
1510         struct se_device *dev = p;
1511
1512         if (!(dev->dev_flags & DF_USING_ALIAS))
1513                 return 0;
1514
1515         return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1516 }
1517
1518 static ssize_t target_core_store_dev_alias(
1519         void *p,
1520         const char *page,
1521         size_t count)
1522 {
1523         struct se_device *dev = p;
1524         struct se_hba *hba = dev->se_hba;
1525         ssize_t read_bytes;
1526
1527         if (count > (SE_DEV_ALIAS_LEN-1)) {
1528                 pr_err("alias count: %d exceeds"
1529                         " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1530                         SE_DEV_ALIAS_LEN-1);
1531                 return -EINVAL;
1532         }
1533
1534         read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1535         if (!read_bytes)
1536                 return -EINVAL;
1537         if (dev->dev_alias[read_bytes - 1] == '\n')
1538                 dev->dev_alias[read_bytes - 1] = '\0';
1539
1540         dev->dev_flags |= DF_USING_ALIAS;
1541
1542         pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1543                 config_item_name(&hba->hba_group.cg_item),
1544                 config_item_name(&dev->dev_group.cg_item),
1545                 dev->dev_alias);
1546
1547         return read_bytes;
1548 }
1549
1550 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1551         .attr   = { .ca_owner = THIS_MODULE,
1552                     .ca_name = "alias",
1553                     .ca_mode =  S_IRUGO | S_IWUSR },
1554         .show   = target_core_show_dev_alias,
1555         .store  = target_core_store_dev_alias,
1556 };
1557
1558 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1559 {
1560         struct se_device *dev = p;
1561
1562         if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1563                 return 0;
1564
1565         return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1566 }
1567
1568 static ssize_t target_core_store_dev_udev_path(
1569         void *p,
1570         const char *page,
1571         size_t count)
1572 {
1573         struct se_device *dev = p;
1574         struct se_hba *hba = dev->se_hba;
1575         ssize_t read_bytes;
1576
1577         if (count > (SE_UDEV_PATH_LEN-1)) {
1578                 pr_err("udev_path count: %d exceeds"
1579                         " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1580                         SE_UDEV_PATH_LEN-1);
1581                 return -EINVAL;
1582         }
1583
1584         read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1585                         "%s", page);
1586         if (!read_bytes)
1587                 return -EINVAL;
1588         if (dev->udev_path[read_bytes - 1] == '\n')
1589                 dev->udev_path[read_bytes - 1] = '\0';
1590
1591         dev->dev_flags |= DF_USING_UDEV_PATH;
1592
1593         pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1594                 config_item_name(&hba->hba_group.cg_item),
1595                 config_item_name(&dev->dev_group.cg_item),
1596                 dev->udev_path);
1597
1598         return read_bytes;
1599 }
1600
1601 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1602         .attr   = { .ca_owner = THIS_MODULE,
1603                     .ca_name = "udev_path",
1604                     .ca_mode =  S_IRUGO | S_IWUSR },
1605         .show   = target_core_show_dev_udev_path,
1606         .store  = target_core_store_dev_udev_path,
1607 };
1608
1609 static ssize_t target_core_show_dev_enable(void *p, char *page)
1610 {
1611         struct se_device *dev = p;
1612
1613         return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1614 }
1615
1616 static ssize_t target_core_store_dev_enable(
1617         void *p,
1618         const char *page,
1619         size_t count)
1620 {
1621         struct se_device *dev = p;
1622         char *ptr;
1623         int ret;
1624
1625         ptr = strstr(page, "1");
1626         if (!ptr) {
1627                 pr_err("For dev_enable ops, only valid value"
1628                                 " is \"1\"\n");
1629                 return -EINVAL;
1630         }
1631
1632         ret = target_configure_device(dev);
1633         if (ret)
1634                 return ret;
1635         return count;
1636 }
1637
1638 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1639         .attr   = { .ca_owner = THIS_MODULE,
1640                     .ca_name = "enable",
1641                     .ca_mode =  S_IRUGO | S_IWUSR },
1642         .show   = target_core_show_dev_enable,
1643         .store  = target_core_store_dev_enable,
1644 };
1645
1646 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1647 {
1648         struct se_device *dev = p;
1649         struct config_item *lu_ci;
1650         struct t10_alua_lu_gp *lu_gp;
1651         struct t10_alua_lu_gp_member *lu_gp_mem;
1652         ssize_t len = 0;
1653
1654         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1655         if (!lu_gp_mem)
1656                 return 0;
1657
1658         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1659         lu_gp = lu_gp_mem->lu_gp;
1660         if (lu_gp) {
1661                 lu_ci = &lu_gp->lu_gp_group.cg_item;
1662                 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1663                         config_item_name(lu_ci), lu_gp->lu_gp_id);
1664         }
1665         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1666
1667         return len;
1668 }
1669
1670 static ssize_t target_core_store_alua_lu_gp(
1671         void *p,
1672         const char *page,
1673         size_t count)
1674 {
1675         struct se_device *dev = p;
1676         struct se_hba *hba = dev->se_hba;
1677         struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1678         struct t10_alua_lu_gp_member *lu_gp_mem;
1679         unsigned char buf[LU_GROUP_NAME_BUF];
1680         int move = 0;
1681
1682         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1683         if (!lu_gp_mem)
1684                 return 0;
1685
1686         if (count > LU_GROUP_NAME_BUF) {
1687                 pr_err("ALUA LU Group Alias too large!\n");
1688                 return -EINVAL;
1689         }
1690         memset(buf, 0, LU_GROUP_NAME_BUF);
1691         memcpy(buf, page, count);
1692         /*
1693          * Any ALUA logical unit alias besides "NULL" means we will be
1694          * making a new group association.
1695          */
1696         if (strcmp(strstrip(buf), "NULL")) {
1697                 /*
1698                  * core_alua_get_lu_gp_by_name() will increment reference to
1699                  * struct t10_alua_lu_gp.  This reference is released with
1700                  * core_alua_get_lu_gp_by_name below().
1701                  */
1702                 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1703                 if (!lu_gp_new)
1704                         return -ENODEV;
1705         }
1706
1707         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1708         lu_gp = lu_gp_mem->lu_gp;
1709         if (lu_gp) {
1710                 /*
1711                  * Clearing an existing lu_gp association, and replacing
1712                  * with NULL
1713                  */
1714                 if (!lu_gp_new) {
1715                         pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1716                                 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1717                                 " %hu\n",
1718                                 config_item_name(&hba->hba_group.cg_item),
1719                                 config_item_name(&dev->dev_group.cg_item),
1720                                 config_item_name(&lu_gp->lu_gp_group.cg_item),
1721                                 lu_gp->lu_gp_id);
1722
1723                         __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1724                         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1725
1726                         return count;
1727                 }
1728                 /*
1729                  * Removing existing association of lu_gp_mem with lu_gp
1730                  */
1731                 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1732                 move = 1;
1733         }
1734         /*
1735          * Associate lu_gp_mem with lu_gp_new.
1736          */
1737         __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1738         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1739
1740         pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1741                 " core/alua/lu_gps/%s, ID: %hu\n",
1742                 (move) ? "Moving" : "Adding",
1743                 config_item_name(&hba->hba_group.cg_item),
1744                 config_item_name(&dev->dev_group.cg_item),
1745                 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1746                 lu_gp_new->lu_gp_id);
1747
1748         core_alua_put_lu_gp_from_name(lu_gp_new);
1749         return count;
1750 }
1751
1752 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1753         .attr   = { .ca_owner = THIS_MODULE,
1754                     .ca_name = "alua_lu_gp",
1755                     .ca_mode = S_IRUGO | S_IWUSR },
1756         .show   = target_core_show_alua_lu_gp,
1757         .store  = target_core_store_alua_lu_gp,
1758 };
1759
1760 static ssize_t target_core_show_dev_lba_map(void *p, char *page)
1761 {
1762         struct se_device *dev = p;
1763         struct t10_alua_lba_map *map;
1764         struct t10_alua_lba_map_member *mem;
1765         char *b = page;
1766         int bl = 0;
1767         char state;
1768
1769         spin_lock(&dev->t10_alua.lba_map_lock);
1770         if (!list_empty(&dev->t10_alua.lba_map_list))
1771             bl += sprintf(b + bl, "%u %u\n",
1772                           dev->t10_alua.lba_map_segment_size,
1773                           dev->t10_alua.lba_map_segment_multiplier);
1774         list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
1775                 bl += sprintf(b + bl, "%llu %llu",
1776                               map->lba_map_first_lba, map->lba_map_last_lba);
1777                 list_for_each_entry(mem, &map->lba_map_mem_list,
1778                                     lba_map_mem_list) {
1779                         switch (mem->lba_map_mem_alua_state) {
1780                         case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
1781                                 state = 'O';
1782                                 break;
1783                         case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
1784                                 state = 'A';
1785                                 break;
1786                         case ALUA_ACCESS_STATE_STANDBY:
1787                                 state = 'S';
1788                                 break;
1789                         case ALUA_ACCESS_STATE_UNAVAILABLE:
1790                                 state = 'U';
1791                                 break;
1792                         default:
1793                                 state = '.';
1794                                 break;
1795                         }
1796                         bl += sprintf(b + bl, " %d:%c",
1797                                       mem->lba_map_mem_alua_pg_id, state);
1798                 }
1799                 bl += sprintf(b + bl, "\n");
1800         }
1801         spin_unlock(&dev->t10_alua.lba_map_lock);
1802         return bl;
1803 }
1804
1805 static ssize_t target_core_store_dev_lba_map(
1806         void *p,
1807         const char *page,
1808         size_t count)
1809 {
1810         struct se_device *dev = p;
1811         struct t10_alua_lba_map *lba_map = NULL;
1812         struct list_head lba_list;
1813         char *map_entries, *ptr;
1814         char state;
1815         int pg_num = -1, pg;
1816         int ret = 0, num = 0, pg_id, alua_state;
1817         unsigned long start_lba = -1, end_lba = -1;
1818         unsigned long segment_size = -1, segment_mult = -1;
1819
1820         map_entries = kstrdup(page, GFP_KERNEL);
1821         if (!map_entries)
1822                 return -ENOMEM;
1823
1824         INIT_LIST_HEAD(&lba_list);
1825         while ((ptr = strsep(&map_entries, "\n")) != NULL) {
1826                 if (!*ptr)
1827                         continue;
1828
1829                 if (num == 0) {
1830                         if (sscanf(ptr, "%lu %lu\n",
1831                                    &segment_size, &segment_mult) != 2) {
1832                                 pr_err("Invalid line %d\n", num);
1833                                 ret = -EINVAL;
1834                                 break;
1835                         }
1836                         num++;
1837                         continue;
1838                 }
1839                 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
1840                         pr_err("Invalid line %d\n", num);
1841                         ret = -EINVAL;
1842                         break;
1843                 }
1844                 ptr = strchr(ptr, ' ');
1845                 if (!ptr) {
1846                         pr_err("Invalid line %d, missing end lba\n", num);
1847                         ret = -EINVAL;
1848                         break;
1849                 }
1850                 ptr++;
1851                 ptr = strchr(ptr, ' ');
1852                 if (!ptr) {
1853                         pr_err("Invalid line %d, missing state definitions\n",
1854                                num);
1855                         ret = -EINVAL;
1856                         break;
1857                 }
1858                 ptr++;
1859                 lba_map = core_alua_allocate_lba_map(&lba_list,
1860                                                      start_lba, end_lba);
1861                 if (IS_ERR(lba_map)) {
1862                         ret = PTR_ERR(lba_map);
1863                         break;
1864                 }
1865                 pg = 0;
1866                 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
1867                         switch (state) {
1868                         case 'O':
1869                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
1870                                 break;
1871                         case 'A':
1872                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
1873                                 break;
1874                         case 'S':
1875                                 alua_state = ALUA_ACCESS_STATE_STANDBY;
1876                                 break;
1877                         case 'U':
1878                                 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
1879                                 break;
1880                         default:
1881                                 pr_err("Invalid ALUA state '%c'\n", state);
1882                                 ret = -EINVAL;
1883                                 goto out;
1884                         }
1885
1886                         ret = core_alua_allocate_lba_map_mem(lba_map,
1887                                                              pg_id, alua_state);
1888                         if (ret) {
1889                                 pr_err("Invalid target descriptor %d:%c "
1890                                        "at line %d\n",
1891                                        pg_id, state, num);
1892                                 break;
1893                         }
1894                         pg++;
1895                         ptr = strchr(ptr, ' ');
1896                         if (ptr)
1897                                 ptr++;
1898                         else
1899                                 break;
1900                 }
1901                 if (pg_num == -1)
1902                     pg_num = pg;
1903                 else if (pg != pg_num) {
1904                         pr_err("Only %d from %d port groups definitions "
1905                                "at line %d\n", pg, pg_num, num);
1906                         ret = -EINVAL;
1907                         break;
1908                 }
1909                 num++;
1910         }
1911 out:
1912         if (ret) {
1913                 core_alua_free_lba_map(&lba_list);
1914                 count = ret;
1915         } else
1916                 core_alua_set_lba_map(dev, &lba_list,
1917                                       segment_size, segment_mult);
1918         kfree(map_entries);
1919         return count;
1920 }
1921
1922 static struct target_core_configfs_attribute target_core_attr_dev_lba_map = {
1923         .attr   = { .ca_owner = THIS_MODULE,
1924                     .ca_name = "lba_map",
1925                     .ca_mode = S_IRUGO | S_IWUSR },
1926         .show   = target_core_show_dev_lba_map,
1927         .store  = target_core_store_dev_lba_map,
1928 };
1929
1930 static struct configfs_attribute *lio_core_dev_attrs[] = {
1931         &target_core_attr_dev_info.attr,
1932         &target_core_attr_dev_control.attr,
1933         &target_core_attr_dev_alias.attr,
1934         &target_core_attr_dev_udev_path.attr,
1935         &target_core_attr_dev_enable.attr,
1936         &target_core_attr_dev_alua_lu_gp.attr,
1937         &target_core_attr_dev_lba_map.attr,
1938         NULL,
1939 };
1940
1941 static void target_core_dev_release(struct config_item *item)
1942 {
1943         struct config_group *dev_cg = to_config_group(item);
1944         struct se_device *dev =
1945                 container_of(dev_cg, struct se_device, dev_group);
1946
1947         kfree(dev_cg->default_groups);
1948         target_free_device(dev);
1949 }
1950
1951 static ssize_t target_core_dev_show(struct config_item *item,
1952                                      struct configfs_attribute *attr,
1953                                      char *page)
1954 {
1955         struct config_group *dev_cg = to_config_group(item);
1956         struct se_device *dev =
1957                 container_of(dev_cg, struct se_device, dev_group);
1958         struct target_core_configfs_attribute *tc_attr = container_of(
1959                         attr, struct target_core_configfs_attribute, attr);
1960
1961         if (!tc_attr->show)
1962                 return -EINVAL;
1963
1964         return tc_attr->show(dev, page);
1965 }
1966
1967 static ssize_t target_core_dev_store(struct config_item *item,
1968                                       struct configfs_attribute *attr,
1969                                       const char *page, size_t count)
1970 {
1971         struct config_group *dev_cg = to_config_group(item);
1972         struct se_device *dev =
1973                 container_of(dev_cg, struct se_device, dev_group);
1974         struct target_core_configfs_attribute *tc_attr = container_of(
1975                         attr, struct target_core_configfs_attribute, attr);
1976
1977         if (!tc_attr->store)
1978                 return -EINVAL;
1979
1980         return tc_attr->store(dev, page, count);
1981 }
1982
1983 static struct configfs_item_operations target_core_dev_item_ops = {
1984         .release                = target_core_dev_release,
1985         .show_attribute         = target_core_dev_show,
1986         .store_attribute        = target_core_dev_store,
1987 };
1988
1989 static struct config_item_type target_core_dev_cit = {
1990         .ct_item_ops            = &target_core_dev_item_ops,
1991         .ct_attrs               = lio_core_dev_attrs,
1992         .ct_owner               = THIS_MODULE,
1993 };
1994
1995 /* End functions for struct config_item_type target_core_dev_cit */
1996
1997 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
1998
1999 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2000 #define SE_DEV_ALUA_LU_ATTR(_name, _mode)                               \
2001 static struct target_core_alua_lu_gp_attribute                          \
2002                         target_core_alua_lu_gp_##_name =                \
2003         __CONFIGFS_EATTR(_name, _mode,                                  \
2004         target_core_alua_lu_gp_show_attr_##_name,                       \
2005         target_core_alua_lu_gp_store_attr_##_name);
2006
2007 #define SE_DEV_ALUA_LU_ATTR_RO(_name)                                   \
2008 static struct target_core_alua_lu_gp_attribute                          \
2009                         target_core_alua_lu_gp_##_name =                \
2010         __CONFIGFS_EATTR_RO(_name,                                      \
2011         target_core_alua_lu_gp_show_attr_##_name);
2012
2013 /*
2014  * lu_gp_id
2015  */
2016 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2017         struct t10_alua_lu_gp *lu_gp,
2018         char *page)
2019 {
2020         if (!lu_gp->lu_gp_valid_id)
2021                 return 0;
2022
2023         return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2024 }
2025
2026 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2027         struct t10_alua_lu_gp *lu_gp,
2028         const char *page,
2029         size_t count)
2030 {
2031         struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2032         unsigned long lu_gp_id;
2033         int ret;
2034
2035         ret = kstrtoul(page, 0, &lu_gp_id);
2036         if (ret < 0) {
2037                 pr_err("kstrtoul() returned %d for"
2038                         " lu_gp_id\n", ret);
2039                 return ret;
2040         }
2041         if (lu_gp_id > 0x0000ffff) {
2042                 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2043                         " 0x0000ffff\n", lu_gp_id);
2044                 return -EINVAL;
2045         }
2046
2047         ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2048         if (ret < 0)
2049                 return -EINVAL;
2050
2051         pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2052                 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2053                 config_item_name(&alua_lu_gp_cg->cg_item),
2054                 lu_gp->lu_gp_id);
2055
2056         return count;
2057 }
2058
2059 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2060
2061 /*
2062  * members
2063  */
2064 static ssize_t target_core_alua_lu_gp_show_attr_members(
2065         struct t10_alua_lu_gp *lu_gp,
2066         char *page)
2067 {
2068         struct se_device *dev;
2069         struct se_hba *hba;
2070         struct t10_alua_lu_gp_member *lu_gp_mem;
2071         ssize_t len = 0, cur_len;
2072         unsigned char buf[LU_GROUP_NAME_BUF];
2073
2074         memset(buf, 0, LU_GROUP_NAME_BUF);
2075
2076         spin_lock(&lu_gp->lu_gp_lock);
2077         list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2078                 dev = lu_gp_mem->lu_gp_mem_dev;
2079                 hba = dev->se_hba;
2080
2081                 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2082                         config_item_name(&hba->hba_group.cg_item),
2083                         config_item_name(&dev->dev_group.cg_item));
2084                 cur_len++; /* Extra byte for NULL terminator */
2085
2086                 if ((cur_len + len) > PAGE_SIZE) {
2087                         pr_warn("Ran out of lu_gp_show_attr"
2088                                 "_members buffer\n");
2089                         break;
2090                 }
2091                 memcpy(page+len, buf, cur_len);
2092                 len += cur_len;
2093         }
2094         spin_unlock(&lu_gp->lu_gp_lock);
2095
2096         return len;
2097 }
2098
2099 SE_DEV_ALUA_LU_ATTR_RO(members);
2100
2101 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2102
2103 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2104         &target_core_alua_lu_gp_lu_gp_id.attr,
2105         &target_core_alua_lu_gp_members.attr,
2106         NULL,
2107 };
2108
2109 static void target_core_alua_lu_gp_release(struct config_item *item)
2110 {
2111         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2112                         struct t10_alua_lu_gp, lu_gp_group);
2113
2114         core_alua_free_lu_gp(lu_gp);
2115 }
2116
2117 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2118         .release                = target_core_alua_lu_gp_release,
2119         .show_attribute         = target_core_alua_lu_gp_attr_show,
2120         .store_attribute        = target_core_alua_lu_gp_attr_store,
2121 };
2122
2123 static struct config_item_type target_core_alua_lu_gp_cit = {
2124         .ct_item_ops            = &target_core_alua_lu_gp_ops,
2125         .ct_attrs               = target_core_alua_lu_gp_attrs,
2126         .ct_owner               = THIS_MODULE,
2127 };
2128
2129 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2130
2131 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2132
2133 static struct config_group *target_core_alua_create_lu_gp(
2134         struct config_group *group,
2135         const char *name)
2136 {
2137         struct t10_alua_lu_gp *lu_gp;
2138         struct config_group *alua_lu_gp_cg = NULL;
2139         struct config_item *alua_lu_gp_ci = NULL;
2140
2141         lu_gp = core_alua_allocate_lu_gp(name, 0);
2142         if (IS_ERR(lu_gp))
2143                 return NULL;
2144
2145         alua_lu_gp_cg = &lu_gp->lu_gp_group;
2146         alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2147
2148         config_group_init_type_name(alua_lu_gp_cg, name,
2149                         &target_core_alua_lu_gp_cit);
2150
2151         pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2152                 " Group: core/alua/lu_gps/%s\n",
2153                 config_item_name(alua_lu_gp_ci));
2154
2155         return alua_lu_gp_cg;
2156
2157 }
2158
2159 static void target_core_alua_drop_lu_gp(
2160         struct config_group *group,
2161         struct config_item *item)
2162 {
2163         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2164                         struct t10_alua_lu_gp, lu_gp_group);
2165
2166         pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2167                 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2168                 config_item_name(item), lu_gp->lu_gp_id);
2169         /*
2170          * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2171          * -> target_core_alua_lu_gp_release()
2172          */
2173         config_item_put(item);
2174 }
2175
2176 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2177         .make_group             = &target_core_alua_create_lu_gp,
2178         .drop_item              = &target_core_alua_drop_lu_gp,
2179 };
2180
2181 static struct config_item_type target_core_alua_lu_gps_cit = {
2182         .ct_item_ops            = NULL,
2183         .ct_group_ops           = &target_core_alua_lu_gps_group_ops,
2184         .ct_owner               = THIS_MODULE,
2185 };
2186
2187 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2188
2189 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2190
2191 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2192 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode)                            \
2193 static struct target_core_alua_tg_pt_gp_attribute                       \
2194                         target_core_alua_tg_pt_gp_##_name =             \
2195         __CONFIGFS_EATTR(_name, _mode,                                  \
2196         target_core_alua_tg_pt_gp_show_attr_##_name,                    \
2197         target_core_alua_tg_pt_gp_store_attr_##_name);
2198
2199 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name)                                \
2200 static struct target_core_alua_tg_pt_gp_attribute                       \
2201                         target_core_alua_tg_pt_gp_##_name =             \
2202         __CONFIGFS_EATTR_RO(_name,                                      \
2203         target_core_alua_tg_pt_gp_show_attr_##_name);
2204
2205 /*
2206  * alua_access_state
2207  */
2208 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2209         struct t10_alua_tg_pt_gp *tg_pt_gp,
2210         char *page)
2211 {
2212         return sprintf(page, "%d\n",
2213                 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2214 }
2215
2216 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2217         struct t10_alua_tg_pt_gp *tg_pt_gp,
2218         const char *page,
2219         size_t count)
2220 {
2221         struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2222         unsigned long tmp;
2223         int new_state, ret;
2224
2225         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2226                 pr_err("Unable to do implicit ALUA on non valid"
2227                         " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2228                 return -EINVAL;
2229         }
2230
2231         ret = kstrtoul(page, 0, &tmp);
2232         if (ret < 0) {
2233                 pr_err("Unable to extract new ALUA access state from"
2234                                 " %s\n", page);
2235                 return ret;
2236         }
2237         new_state = (int)tmp;
2238
2239         if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2240                 pr_err("Unable to process implicit configfs ALUA"
2241                         " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2242                 return -EINVAL;
2243         }
2244         if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2245             new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2246                 /* LBA DEPENDENT is only allowed with implicit ALUA */
2247                 pr_err("Unable to process implicit configfs ALUA transition"
2248                        " while explicit ALUA management is enabled\n");
2249                 return -EINVAL;
2250         }
2251
2252         ret = core_alua_do_port_transition(tg_pt_gp, dev,
2253                                         NULL, NULL, new_state, 0);
2254         return (!ret) ? count : -EINVAL;
2255 }
2256
2257 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2258
2259 /*
2260  * alua_access_status
2261  */
2262 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2263         struct t10_alua_tg_pt_gp *tg_pt_gp,
2264         char *page)
2265 {
2266         return sprintf(page, "%s\n",
2267                 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2268 }
2269
2270 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2271         struct t10_alua_tg_pt_gp *tg_pt_gp,
2272         const char *page,
2273         size_t count)
2274 {
2275         unsigned long tmp;
2276         int new_status, ret;
2277
2278         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2279                 pr_err("Unable to do set ALUA access status on non"
2280                         " valid tg_pt_gp ID: %hu\n",
2281                         tg_pt_gp->tg_pt_gp_valid_id);
2282                 return -EINVAL;
2283         }
2284
2285         ret = kstrtoul(page, 0, &tmp);
2286         if (ret < 0) {
2287                 pr_err("Unable to extract new ALUA access status"
2288                                 " from %s\n", page);
2289                 return ret;
2290         }
2291         new_status = (int)tmp;
2292
2293         if ((new_status != ALUA_STATUS_NONE) &&
2294             (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2295             (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2296                 pr_err("Illegal ALUA access status: 0x%02x\n",
2297                                 new_status);
2298                 return -EINVAL;
2299         }
2300
2301         tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2302         return count;
2303 }
2304
2305 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2306
2307 /*
2308  * alua_access_type
2309  */
2310 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2311         struct t10_alua_tg_pt_gp *tg_pt_gp,
2312         char *page)
2313 {
2314         return core_alua_show_access_type(tg_pt_gp, page);
2315 }
2316
2317 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2318         struct t10_alua_tg_pt_gp *tg_pt_gp,
2319         const char *page,
2320         size_t count)
2321 {
2322         return core_alua_store_access_type(tg_pt_gp, page, count);
2323 }
2324
2325 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2326
2327 /*
2328  * alua_supported_states
2329  */
2330
2331 #define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit)               \
2332 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \
2333         struct t10_alua_tg_pt_gp *t, char *p)                           \
2334 {                                                                       \
2335         return sprintf(p, "%d\n", !!(t->_var & _bit));                  \
2336 }
2337
2338 #define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit)              \
2339 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\
2340         struct t10_alua_tg_pt_gp *t, const char *p, size_t c)           \
2341 {                                                                       \
2342         unsigned long tmp;                                              \
2343         int ret;                                                        \
2344                                                                         \
2345         if (!t->tg_pt_gp_valid_id) {                                    \
2346                 pr_err("Unable to do set ##_name ALUA state on non"     \
2347                        " valid tg_pt_gp ID: %hu\n",                     \
2348                        t->tg_pt_gp_valid_id);                           \
2349                 return -EINVAL;                                         \
2350         }                                                               \
2351                                                                         \
2352         ret = kstrtoul(p, 0, &tmp);                                     \
2353         if (ret < 0) {                                                  \
2354                 pr_err("Invalid value '%s', must be '0' or '1'\n", p);  \
2355                 return -EINVAL;                                         \
2356         }                                                               \
2357         if (tmp > 1) {                                                  \
2358                 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2359                 return -EINVAL;                                         \
2360         }                                                               \
2361         if (!tmp)                                                       \
2362                 t->_var |= _bit;                                        \
2363         else                                                            \
2364                 t->_var &= ~_bit;                                       \
2365                                                                         \
2366         return c;                                                       \
2367 }
2368
2369 SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning,
2370                                tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2371 SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning,
2372                                 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2373 SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR);
2374
2375 SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline,
2376                                tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2377 SE_DEV_ALUA_SUPPORT_STATE_STORE(offline,
2378                                 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2379 SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR);
2380
2381 SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent,
2382                                tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2383 SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent,
2384                                 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2385 SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO);
2386
2387 SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable,
2388                                tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2389 SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable,
2390                                 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2391 SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR);
2392
2393 SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby,
2394                                tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2395 SE_DEV_ALUA_SUPPORT_STATE_STORE(standby,
2396                                 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2397 SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR);
2398
2399 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized,
2400                                tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2401 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized,
2402                                 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2403 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR);
2404
2405 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized,
2406                                tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2407 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized,
2408                                 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2409 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR);
2410
2411 /*
2412  * alua_write_metadata
2413  */
2414 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2415         struct t10_alua_tg_pt_gp *tg_pt_gp,
2416         char *page)
2417 {
2418         return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2419 }
2420
2421 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2422         struct t10_alua_tg_pt_gp *tg_pt_gp,
2423         const char *page,
2424         size_t count)
2425 {
2426         unsigned long tmp;
2427         int ret;
2428
2429         ret = kstrtoul(page, 0, &tmp);
2430         if (ret < 0) {
2431                 pr_err("Unable to extract alua_write_metadata\n");
2432                 return ret;
2433         }
2434
2435         if ((tmp != 0) && (tmp != 1)) {
2436                 pr_err("Illegal value for alua_write_metadata:"
2437                         " %lu\n", tmp);
2438                 return -EINVAL;
2439         }
2440         tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2441
2442         return count;
2443 }
2444
2445 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2446
2447
2448
2449 /*
2450  * nonop_delay_msecs
2451  */
2452 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2453         struct t10_alua_tg_pt_gp *tg_pt_gp,
2454         char *page)
2455 {
2456         return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2457
2458 }
2459
2460 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2461         struct t10_alua_tg_pt_gp *tg_pt_gp,
2462         const char *page,
2463         size_t count)
2464 {
2465         return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2466 }
2467
2468 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2469
2470 /*
2471  * trans_delay_msecs
2472  */
2473 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2474         struct t10_alua_tg_pt_gp *tg_pt_gp,
2475         char *page)
2476 {
2477         return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2478 }
2479
2480 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2481         struct t10_alua_tg_pt_gp *tg_pt_gp,
2482         const char *page,
2483         size_t count)
2484 {
2485         return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2486 }
2487
2488 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2489
2490 /*
2491  * implicit_trans_secs
2492  */
2493 static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs(
2494         struct t10_alua_tg_pt_gp *tg_pt_gp,
2495         char *page)
2496 {
2497         return core_alua_show_implicit_trans_secs(tg_pt_gp, page);
2498 }
2499
2500 static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs(
2501         struct t10_alua_tg_pt_gp *tg_pt_gp,
2502         const char *page,
2503         size_t count)
2504 {
2505         return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count);
2506 }
2507
2508 SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR);
2509
2510 /*
2511  * preferred
2512  */
2513
2514 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2515         struct t10_alua_tg_pt_gp *tg_pt_gp,
2516         char *page)
2517 {
2518         return core_alua_show_preferred_bit(tg_pt_gp, page);
2519 }
2520
2521 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2522         struct t10_alua_tg_pt_gp *tg_pt_gp,
2523         const char *page,
2524         size_t count)
2525 {
2526         return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2527 }
2528
2529 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2530
2531 /*
2532  * tg_pt_gp_id
2533  */
2534 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2535         struct t10_alua_tg_pt_gp *tg_pt_gp,
2536         char *page)
2537 {
2538         if (!tg_pt_gp->tg_pt_gp_valid_id)
2539                 return 0;
2540
2541         return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2542 }
2543
2544 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2545         struct t10_alua_tg_pt_gp *tg_pt_gp,
2546         const char *page,
2547         size_t count)
2548 {
2549         struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2550         unsigned long tg_pt_gp_id;
2551         int ret;
2552
2553         ret = kstrtoul(page, 0, &tg_pt_gp_id);
2554         if (ret < 0) {
2555                 pr_err("kstrtoul() returned %d for"
2556                         " tg_pt_gp_id\n", ret);
2557                 return ret;
2558         }
2559         if (tg_pt_gp_id > 0x0000ffff) {
2560                 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2561                         " 0x0000ffff\n", tg_pt_gp_id);
2562                 return -EINVAL;
2563         }
2564
2565         ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2566         if (ret < 0)
2567                 return -EINVAL;
2568
2569         pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2570                 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2571                 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2572                 tg_pt_gp->tg_pt_gp_id);
2573
2574         return count;
2575 }
2576
2577 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2578
2579 /*
2580  * members
2581  */
2582 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2583         struct t10_alua_tg_pt_gp *tg_pt_gp,
2584         char *page)
2585 {
2586         struct se_port *port;
2587         struct se_portal_group *tpg;
2588         struct se_lun *lun;
2589         struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2590         ssize_t len = 0, cur_len;
2591         unsigned char buf[TG_PT_GROUP_NAME_BUF];
2592
2593         memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2594
2595         spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2596         list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2597                         tg_pt_gp_mem_list) {
2598                 port = tg_pt_gp_mem->tg_pt;
2599                 tpg = port->sep_tpg;
2600                 lun = port->sep_lun;
2601
2602                 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2603                         "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2604                         tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2605                         tpg->se_tpg_tfo->tpg_get_tag(tpg),
2606                         config_item_name(&lun->lun_group.cg_item));
2607                 cur_len++; /* Extra byte for NULL terminator */
2608
2609                 if ((cur_len + len) > PAGE_SIZE) {
2610                         pr_warn("Ran out of lu_gp_show_attr"
2611                                 "_members buffer\n");
2612                         break;
2613                 }
2614                 memcpy(page+len, buf, cur_len);
2615                 len += cur_len;
2616         }
2617         spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2618
2619         return len;
2620 }
2621
2622 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2623
2624 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2625                         tg_pt_gp_group);
2626
2627 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2628         &target_core_alua_tg_pt_gp_alua_access_state.attr,
2629         &target_core_alua_tg_pt_gp_alua_access_status.attr,
2630         &target_core_alua_tg_pt_gp_alua_access_type.attr,
2631         &target_core_alua_tg_pt_gp_alua_support_transitioning.attr,
2632         &target_core_alua_tg_pt_gp_alua_support_offline.attr,
2633         &target_core_alua_tg_pt_gp_alua_support_lba_dependent.attr,
2634         &target_core_alua_tg_pt_gp_alua_support_unavailable.attr,
2635         &target_core_alua_tg_pt_gp_alua_support_standby.attr,
2636         &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized.attr,
2637         &target_core_alua_tg_pt_gp_alua_support_active_optimized.attr,
2638         &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2639         &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2640         &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2641         &target_core_alua_tg_pt_gp_implicit_trans_secs.attr,
2642         &target_core_alua_tg_pt_gp_preferred.attr,
2643         &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2644         &target_core_alua_tg_pt_gp_members.attr,
2645         NULL,
2646 };
2647
2648 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2649 {
2650         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2651                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2652
2653         core_alua_free_tg_pt_gp(tg_pt_gp);
2654 }
2655
2656 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2657         .release                = target_core_alua_tg_pt_gp_release,
2658         .show_attribute         = target_core_alua_tg_pt_gp_attr_show,
2659         .store_attribute        = target_core_alua_tg_pt_gp_attr_store,
2660 };
2661
2662 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2663         .ct_item_ops            = &target_core_alua_tg_pt_gp_ops,
2664         .ct_attrs               = target_core_alua_tg_pt_gp_attrs,
2665         .ct_owner               = THIS_MODULE,
2666 };
2667
2668 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2669
2670 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2671
2672 static struct config_group *target_core_alua_create_tg_pt_gp(
2673         struct config_group *group,
2674         const char *name)
2675 {
2676         struct t10_alua *alua = container_of(group, struct t10_alua,
2677                                         alua_tg_pt_gps_group);
2678         struct t10_alua_tg_pt_gp *tg_pt_gp;
2679         struct config_group *alua_tg_pt_gp_cg = NULL;
2680         struct config_item *alua_tg_pt_gp_ci = NULL;
2681
2682         tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2683         if (!tg_pt_gp)
2684                 return NULL;
2685
2686         alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2687         alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2688
2689         config_group_init_type_name(alua_tg_pt_gp_cg, name,
2690                         &target_core_alua_tg_pt_gp_cit);
2691
2692         pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2693                 " Group: alua/tg_pt_gps/%s\n",
2694                 config_item_name(alua_tg_pt_gp_ci));
2695
2696         return alua_tg_pt_gp_cg;
2697 }
2698
2699 static void target_core_alua_drop_tg_pt_gp(
2700         struct config_group *group,
2701         struct config_item *item)
2702 {
2703         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2704                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2705
2706         pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2707                 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2708                 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2709         /*
2710          * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2711          * -> target_core_alua_tg_pt_gp_release().
2712          */
2713         config_item_put(item);
2714 }
2715
2716 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2717         .make_group             = &target_core_alua_create_tg_pt_gp,
2718         .drop_item              = &target_core_alua_drop_tg_pt_gp,
2719 };
2720
2721 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2722         .ct_group_ops           = &target_core_alua_tg_pt_gps_group_ops,
2723         .ct_owner               = THIS_MODULE,
2724 };
2725
2726 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2727
2728 /* Start functions for struct config_item_type target_core_alua_cit */
2729
2730 /*
2731  * target_core_alua_cit is a ConfigFS group that lives under
2732  * /sys/kernel/config/target/core/alua.  There are default groups
2733  * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2734  * target_core_alua_cit in target_core_init_configfs() below.
2735  */
2736 static struct config_item_type target_core_alua_cit = {
2737         .ct_item_ops            = NULL,
2738         .ct_attrs               = NULL,
2739         .ct_owner               = THIS_MODULE,
2740 };
2741
2742 /* End functions for struct config_item_type target_core_alua_cit */
2743
2744 /* Start functions for struct config_item_type target_core_stat_cit */
2745
2746 static struct config_group *target_core_stat_mkdir(
2747         struct config_group *group,
2748         const char *name)
2749 {
2750         return ERR_PTR(-ENOSYS);
2751 }
2752
2753 static void target_core_stat_rmdir(
2754         struct config_group *group,
2755         struct config_item *item)
2756 {
2757         return;
2758 }
2759
2760 static struct configfs_group_operations target_core_stat_group_ops = {
2761         .make_group             = &target_core_stat_mkdir,
2762         .drop_item              = &target_core_stat_rmdir,
2763 };
2764
2765 static struct config_item_type target_core_stat_cit = {
2766         .ct_group_ops           = &target_core_stat_group_ops,
2767         .ct_owner               = THIS_MODULE,
2768 };
2769
2770 /* End functions for struct config_item_type target_core_stat_cit */
2771
2772 /* Start functions for struct config_item_type target_core_hba_cit */
2773
2774 static struct config_group *target_core_make_subdev(
2775         struct config_group *group,
2776         const char *name)
2777 {
2778         struct t10_alua_tg_pt_gp *tg_pt_gp;
2779         struct se_subsystem_api *t;
2780         struct config_item *hba_ci = &group->cg_item;
2781         struct se_hba *hba = item_to_hba(hba_ci);
2782         struct se_device *dev;
2783         struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2784         struct config_group *dev_stat_grp = NULL;
2785         int errno = -ENOMEM, ret;
2786
2787         ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2788         if (ret)
2789                 return ERR_PTR(ret);
2790         /*
2791          * Locate the struct se_subsystem_api from parent's struct se_hba.
2792          */
2793         t = hba->transport;
2794
2795         dev = target_alloc_device(hba, name);
2796         if (!dev)
2797                 goto out_unlock;
2798
2799         dev_cg = &dev->dev_group;
2800
2801         dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
2802                         GFP_KERNEL);
2803         if (!dev_cg->default_groups)
2804                 goto out_free_device;
2805
2806         config_group_init_type_name(dev_cg, name, &target_core_dev_cit);
2807         config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2808                         &target_core_dev_attrib_cit);
2809         config_group_init_type_name(&dev->dev_pr_group, "pr",
2810                         &target_core_dev_pr_cit);
2811         config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2812                         &target_core_dev_wwn_cit);
2813         config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2814                         "alua", &target_core_alua_tg_pt_gps_cit);
2815         config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2816                         "statistics", &target_core_stat_cit);
2817
2818         dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
2819         dev_cg->default_groups[1] = &dev->dev_pr_group;
2820         dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
2821         dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
2822         dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
2823         dev_cg->default_groups[5] = NULL;
2824         /*
2825          * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2826          */
2827         tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2828         if (!tg_pt_gp)
2829                 goto out_free_dev_cg_default_groups;
2830         dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2831
2832         tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2833         tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2834                                 GFP_KERNEL);
2835         if (!tg_pt_gp_cg->default_groups) {
2836                 pr_err("Unable to allocate tg_pt_gp_cg->"
2837                                 "default_groups\n");
2838                 goto out_free_tg_pt_gp;
2839         }
2840
2841         config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2842                         "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2843         tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2844         tg_pt_gp_cg->default_groups[1] = NULL;
2845         /*
2846          * Add core/$HBA/$DEV/statistics/ default groups
2847          */
2848         dev_stat_grp = &dev->dev_stat_grps.stat_group;
2849         dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
2850                                 GFP_KERNEL);
2851         if (!dev_stat_grp->default_groups) {
2852                 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2853                 goto out_free_tg_pt_gp_cg_default_groups;
2854         }
2855         target_stat_setup_dev_default_groups(dev);
2856
2857         mutex_unlock(&hba->hba_access_mutex);
2858         return dev_cg;
2859
2860 out_free_tg_pt_gp_cg_default_groups:
2861         kfree(tg_pt_gp_cg->default_groups);
2862 out_free_tg_pt_gp:
2863         core_alua_free_tg_pt_gp(tg_pt_gp);
2864 out_free_dev_cg_default_groups:
2865         kfree(dev_cg->default_groups);
2866 out_free_device:
2867         target_free_device(dev);
2868 out_unlock:
2869         mutex_unlock(&hba->hba_access_mutex);
2870         return ERR_PTR(errno);
2871 }
2872
2873 static void target_core_drop_subdev(
2874         struct config_group *group,
2875         struct config_item *item)
2876 {
2877         struct config_group *dev_cg = to_config_group(item);
2878         struct se_device *dev =
2879                 container_of(dev_cg, struct se_device, dev_group);
2880         struct se_hba *hba;
2881         struct config_item *df_item;
2882         struct config_group *tg_pt_gp_cg, *dev_stat_grp;
2883         int i;
2884
2885         hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
2886
2887         mutex_lock(&hba->hba_access_mutex);
2888
2889         dev_stat_grp = &dev->dev_stat_grps.stat_group;
2890         for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2891                 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2892                 dev_stat_grp->default_groups[i] = NULL;
2893                 config_item_put(df_item);
2894         }
2895         kfree(dev_stat_grp->default_groups);
2896
2897         tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2898         for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2899                 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2900                 tg_pt_gp_cg->default_groups[i] = NULL;
2901                 config_item_put(df_item);
2902         }
2903         kfree(tg_pt_gp_cg->default_groups);
2904         /*
2905          * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2906          * directly from target_core_alua_tg_pt_gp_release().
2907          */
2908         dev->t10_alua.default_tg_pt_gp = NULL;
2909
2910         for (i = 0; dev_cg->default_groups[i]; i++) {
2911                 df_item = &dev_cg->default_groups[i]->cg_item;
2912                 dev_cg->default_groups[i] = NULL;
2913                 config_item_put(df_item);
2914         }
2915         /*
2916          * se_dev is released from target_core_dev_item_ops->release()
2917          */
2918         config_item_put(item);
2919         mutex_unlock(&hba->hba_access_mutex);
2920 }
2921
2922 static struct configfs_group_operations target_core_hba_group_ops = {
2923         .make_group             = target_core_make_subdev,
2924         .drop_item              = target_core_drop_subdev,
2925 };
2926
2927 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2928 #define SE_HBA_ATTR(_name, _mode)                               \
2929 static struct target_core_hba_attribute                         \
2930                 target_core_hba_##_name =                       \
2931                 __CONFIGFS_EATTR(_name, _mode,                  \
2932                 target_core_hba_show_attr_##_name,              \
2933                 target_core_hba_store_attr_##_name);
2934
2935 #define SE_HBA_ATTR_RO(_name)                                   \
2936 static struct target_core_hba_attribute                         \
2937                 target_core_hba_##_name =                       \
2938                 __CONFIGFS_EATTR_RO(_name,                      \
2939                 target_core_hba_show_attr_##_name);
2940
2941 static ssize_t target_core_hba_show_attr_hba_info(
2942         struct se_hba *hba,
2943         char *page)
2944 {
2945         return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2946                         hba->hba_id, hba->transport->name,
2947                         TARGET_CORE_CONFIGFS_VERSION);
2948 }
2949
2950 SE_HBA_ATTR_RO(hba_info);
2951
2952 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2953                                 char *page)
2954 {
2955         int hba_mode = 0;
2956
2957         if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2958                 hba_mode = 1;
2959
2960         return sprintf(page, "%d\n", hba_mode);
2961 }
2962
2963 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2964                                 const char *page, size_t count)
2965 {
2966         struct se_subsystem_api *transport = hba->transport;
2967         unsigned long mode_flag;
2968         int ret;
2969
2970         if (transport->pmode_enable_hba == NULL)
2971                 return -EINVAL;
2972
2973         ret = kstrtoul(page, 0, &mode_flag);
2974         if (ret < 0) {
2975                 pr_err("Unable to extract hba mode flag: %d\n", ret);
2976                 return ret;
2977         }
2978
2979         if (hba->dev_count) {
2980                 pr_err("Unable to set hba_mode with active devices\n");
2981                 return -EINVAL;
2982         }
2983
2984         ret = transport->pmode_enable_hba(hba, mode_flag);
2985         if (ret < 0)
2986                 return -EINVAL;
2987         if (ret > 0)
2988                 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2989         else if (ret == 0)
2990                 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2991
2992         return count;
2993 }
2994
2995 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2996
2997 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2998
2999 static void target_core_hba_release(struct config_item *item)
3000 {
3001         struct se_hba *hba = container_of(to_config_group(item),
3002                                 struct se_hba, hba_group);
3003         core_delete_hba(hba);
3004 }
3005
3006 static struct configfs_attribute *target_core_hba_attrs[] = {
3007         &target_core_hba_hba_info.attr,
3008         &target_core_hba_hba_mode.attr,
3009         NULL,
3010 };
3011
3012 static struct configfs_item_operations target_core_hba_item_ops = {
3013         .release                = target_core_hba_release,
3014         .show_attribute         = target_core_hba_attr_show,
3015         .store_attribute        = target_core_hba_attr_store,
3016 };
3017
3018 static struct config_item_type target_core_hba_cit = {
3019         .ct_item_ops            = &target_core_hba_item_ops,
3020         .ct_group_ops           = &target_core_hba_group_ops,
3021         .ct_attrs               = target_core_hba_attrs,
3022         .ct_owner               = THIS_MODULE,
3023 };
3024
3025 static struct config_group *target_core_call_addhbatotarget(
3026         struct config_group *group,
3027         const char *name)
3028 {
3029         char *se_plugin_str, *str, *str2;
3030         struct se_hba *hba;
3031         char buf[TARGET_CORE_NAME_MAX_LEN];
3032         unsigned long plugin_dep_id = 0;
3033         int ret;
3034
3035         memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3036         if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3037                 pr_err("Passed *name strlen(): %d exceeds"
3038                         " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3039                         TARGET_CORE_NAME_MAX_LEN);
3040                 return ERR_PTR(-ENAMETOOLONG);
3041         }
3042         snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3043
3044         str = strstr(buf, "_");
3045         if (!str) {
3046                 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3047                 return ERR_PTR(-EINVAL);
3048         }
3049         se_plugin_str = buf;
3050         /*
3051          * Special case for subsystem plugins that have "_" in their names.
3052          * Namely rd_direct and rd_mcp..
3053          */
3054         str2 = strstr(str+1, "_");
3055         if (str2) {
3056                 *str2 = '\0'; /* Terminate for *se_plugin_str */
3057                 str2++; /* Skip to start of plugin dependent ID */
3058                 str = str2;
3059         } else {
3060                 *str = '\0'; /* Terminate for *se_plugin_str */
3061                 str++; /* Skip to start of plugin dependent ID */
3062         }
3063
3064         ret = kstrtoul(str, 0, &plugin_dep_id);
3065         if (ret < 0) {
3066                 pr_err("kstrtoul() returned %d for"
3067                                 " plugin_dep_id\n", ret);
3068                 return ERR_PTR(ret);
3069         }
3070         /*
3071          * Load up TCM subsystem plugins if they have not already been loaded.
3072          */
3073         transport_subsystem_check_init();
3074
3075         hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3076         if (IS_ERR(hba))
3077                 return ERR_CAST(hba);
3078
3079         config_group_init_type_name(&hba->hba_group, name,
3080                         &target_core_hba_cit);
3081
3082         return &hba->hba_group;
3083 }
3084
3085 static void target_core_call_delhbafromtarget(
3086         struct config_group *group,
3087         struct config_item *item)
3088 {
3089         /*
3090          * core_delete_hba() is called from target_core_hba_item_ops->release()
3091          * -> target_core_hba_release()
3092          */
3093         config_item_put(item);
3094 }
3095
3096 static struct configfs_group_operations target_core_group_ops = {
3097         .make_group     = target_core_call_addhbatotarget,
3098         .drop_item      = target_core_call_delhbafromtarget,
3099 };
3100
3101 static struct config_item_type target_core_cit = {
3102         .ct_item_ops    = NULL,
3103         .ct_group_ops   = &target_core_group_ops,
3104         .ct_attrs       = NULL,
3105         .ct_owner       = THIS_MODULE,
3106 };
3107
3108 /* Stop functions for struct config_item_type target_core_hba_cit */
3109
3110 static int __init target_core_init_configfs(void)
3111 {
3112         struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3113         struct config_group *lu_gp_cg = NULL;
3114         struct configfs_subsystem *subsys;
3115         struct t10_alua_lu_gp *lu_gp;
3116         int ret;
3117
3118         pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3119                 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3120                 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3121
3122         subsys = target_core_subsystem[0];
3123         config_group_init(&subsys->su_group);
3124         mutex_init(&subsys->su_mutex);
3125
3126         ret = init_se_kmem_caches();
3127         if (ret < 0)
3128                 return ret;
3129         /*
3130          * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3131          * and ALUA Logical Unit Group and Target Port Group infrastructure.
3132          */
3133         target_cg = &subsys->su_group;
3134         target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3135                                 GFP_KERNEL);
3136         if (!target_cg->default_groups) {
3137                 pr_err("Unable to allocate target_cg->default_groups\n");
3138                 ret = -ENOMEM;
3139                 goto out_global;
3140         }
3141
3142         config_group_init_type_name(&target_core_hbagroup,
3143                         "core", &target_core_cit);
3144         target_cg->default_groups[0] = &target_core_hbagroup;
3145         target_cg->default_groups[1] = NULL;
3146         /*
3147          * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3148          */
3149         hba_cg = &target_core_hbagroup;
3150         hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3151                                 GFP_KERNEL);
3152         if (!hba_cg->default_groups) {
3153                 pr_err("Unable to allocate hba_cg->default_groups\n");
3154                 ret = -ENOMEM;
3155                 goto out_global;
3156         }
3157         config_group_init_type_name(&alua_group,
3158                         "alua", &target_core_alua_cit);
3159         hba_cg->default_groups[0] = &alua_group;
3160         hba_cg->default_groups[1] = NULL;
3161         /*
3162          * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3163          * groups under /sys/kernel/config/target/core/alua/
3164          */
3165         alua_cg = &alua_group;
3166         alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3167                         GFP_KERNEL);
3168         if (!alua_cg->default_groups) {
3169                 pr_err("Unable to allocate alua_cg->default_groups\n");
3170                 ret = -ENOMEM;
3171                 goto out_global;
3172         }
3173
3174         config_group_init_type_name(&alua_lu_gps_group,
3175                         "lu_gps", &target_core_alua_lu_gps_cit);
3176         alua_cg->default_groups[0] = &alua_lu_gps_group;
3177         alua_cg->default_groups[1] = NULL;
3178         /*
3179          * Add core/alua/lu_gps/default_lu_gp
3180          */
3181         lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3182         if (IS_ERR(lu_gp)) {
3183                 ret = -ENOMEM;
3184                 goto out_global;
3185         }
3186
3187         lu_gp_cg = &alua_lu_gps_group;
3188         lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3189                         GFP_KERNEL);
3190         if (!lu_gp_cg->default_groups) {
3191                 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3192                 ret = -ENOMEM;
3193                 goto out_global;
3194         }
3195
3196         config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3197                                 &target_core_alua_lu_gp_cit);
3198         lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3199         lu_gp_cg->default_groups[1] = NULL;
3200         default_lu_gp = lu_gp;
3201         /*
3202          * Register the target_core_mod subsystem with configfs.
3203          */
3204         ret = configfs_register_subsystem(subsys);
3205         if (ret < 0) {
3206                 pr_err("Error %d while registering subsystem %s\n",
3207                         ret, subsys->su_group.cg_item.ci_namebuf);
3208                 goto out_global;
3209         }
3210         pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3211                 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3212                 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3213         /*
3214          * Register built-in RAMDISK subsystem logic for virtual LUN 0
3215          */
3216         ret = rd_module_init();
3217         if (ret < 0)
3218                 goto out;
3219
3220         ret = core_dev_setup_virtual_lun0();
3221         if (ret < 0)
3222                 goto out;
3223
3224         ret = target_xcopy_setup_pt();
3225         if (ret < 0)
3226                 goto out;
3227
3228         return 0;
3229
3230 out:
3231         configfs_unregister_subsystem(subsys);
3232         core_dev_release_virtual_lun0();
3233         rd_module_exit();
3234 out_global:
3235         if (default_lu_gp) {
3236                 core_alua_free_lu_gp(default_lu_gp);
3237                 default_lu_gp = NULL;
3238         }
3239         if (lu_gp_cg)
3240                 kfree(lu_gp_cg->default_groups);
3241         if (alua_cg)
3242                 kfree(alua_cg->default_groups);
3243         if (hba_cg)
3244                 kfree(hba_cg->default_groups);
3245         kfree(target_cg->default_groups);
3246         release_se_kmem_caches();
3247         return ret;
3248 }
3249
3250 static void __exit target_core_exit_configfs(void)
3251 {
3252         struct configfs_subsystem *subsys;
3253         struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3254         struct config_item *item;
3255         int i;
3256
3257         subsys = target_core_subsystem[0];
3258
3259         lu_gp_cg = &alua_lu_gps_group;
3260         for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3261                 item = &lu_gp_cg->default_groups[i]->cg_item;
3262                 lu_gp_cg->default_groups[i] = NULL;
3263                 config_item_put(item);
3264         }
3265         kfree(lu_gp_cg->default_groups);
3266         lu_gp_cg->default_groups = NULL;
3267
3268         alua_cg = &alua_group;
3269         for (i = 0; alua_cg->default_groups[i]; i++) {
3270                 item = &alua_cg->default_groups[i]->cg_item;
3271                 alua_cg->default_groups[i] = NULL;
3272                 config_item_put(item);
3273         }
3274         kfree(alua_cg->default_groups);
3275         alua_cg->default_groups = NULL;
3276
3277         hba_cg = &target_core_hbagroup;
3278         for (i = 0; hba_cg->default_groups[i]; i++) {
3279                 item = &hba_cg->default_groups[i]->cg_item;
3280                 hba_cg->default_groups[i] = NULL;
3281                 config_item_put(item);
3282         }
3283         kfree(hba_cg->default_groups);
3284         hba_cg->default_groups = NULL;
3285         /*
3286          * We expect subsys->su_group.default_groups to be released
3287          * by configfs subsystem provider logic..
3288          */
3289         configfs_unregister_subsystem(subsys);
3290         kfree(subsys->su_group.default_groups);
3291
3292         core_alua_free_lu_gp(default_lu_gp);
3293         default_lu_gp = NULL;
3294
3295         pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3296                         " Infrastructure\n");
3297
3298         core_dev_release_virtual_lun0();
3299         rd_module_exit();
3300         target_xcopy_release_pt();
3301         release_se_kmem_caches();
3302 }
3303
3304 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3305 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3306 MODULE_LICENSE("GPL");
3307
3308 module_init(target_core_init_configfs);
3309 module_exit(target_core_exit_configfs);