drivers/target/target_core_configfs.c

   1 /*******************************************************************************
   2  * Filename:  target_core_configfs.c
   3  *
   4  * This file contains ConfigFS logic for the Generic Target Engine project.
   5  *
   6  * (c) Copyright 2008-2013 Datera, Inc.
   7  *
   8  * Nicholas A. Bellinger <nab@kernel.org>
   9  *
  10  * based on configfs Copyright (C) 2005 Oracle.  All rights reserved.
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  ****************************************************************************/
  22
  23 #include <linux/module.h>
  24 #include <linux/moduleparam.h>
  25 #include <generated/utsrelease.h>
  26 #include <linux/utsname.h>
  27 #include <linux/init.h>
  28 #include <linux/fs.h>
  29 #include <linux/namei.h>
  30 #include <linux/slab.h>
  31 #include <linux/types.h>
  32 #include <linux/delay.h>
  33 #include <linux/unistd.h>
  34 #include <linux/string.h>
  35 #include <linux/parser.h>
  36 #include <linux/syscalls.h>
  37 #include <linux/configfs.h>
  38 #include <linux/spinlock.h>
  39
  40 #include <target/target_core_base.h>
  41 #include <target/target_core_backend.h>
  42 #include <target/target_core_fabric.h>
  43 #include <target/target_core_fabric_configfs.h>
  44 #include <target/target_core_configfs.h>
  45 #include <target/configfs_macros.h>
  46
  47 #include "target_core_internal.h"
  48 #include "target_core_alua.h"
  49 #include "target_core_pr.h"
  50 #include "target_core_rd.h"
  51 #include "target_core_xcopy.h"
  52
  53 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs)              \
  54 static void target_core_setup_##_name##_cit(struct se_subsystem_api *sa) \
  55 {                                                                       \
  56         struct target_backend_cits *tbc = &sa->tb_cits;                 \
  57         struct config_item_type *cit = &tbc->tb_##_name##_cit;          \
  58                                                                         \
  59         cit->ct_item_ops = _item_ops;                                   \
  60         cit->ct_group_ops = _group_ops;                                 \
  61         cit->ct_attrs = _attrs;                                         \
  62         cit->ct_owner = sa->owner;                                      \
  63         pr_debug("Setup generic %s\n", __stringify(_name));             \
  64 }
  65
  66 extern struct t10_alua_lu_gp *default_lu_gp;
  67
  68 static LIST_HEAD(g_tf_list);
  69 static DEFINE_MUTEX(g_tf_lock);
  70
  71 struct target_core_configfs_attribute {
  72         struct configfs_attribute attr;
  73         ssize_t (*show)(void *, char *);
  74         ssize_t (*store)(void *, const char *, size_t);
  75 };
  76
  77 static struct config_group target_core_hbagroup;
  78 static struct config_group alua_group;
  79 static struct config_group alua_lu_gps_group;
  80
  81 static inline struct se_hba *
  82 item_to_hba(struct config_item *item)
  83 {
  84         return container_of(to_config_group(item), struct se_hba, hba_group);
  85 }
  86
  87 /*
  88  * Attributes for /sys/kernel/config/target/
  89  */
  90 static ssize_t target_core_attr_show(struct config_item *item,
  91                                       struct configfs_attribute *attr,
  92                                       char *page)
  93 {
  94         return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
  95                 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
  96                 utsname()->sysname, utsname()->machine);
  97 }
  98
  99 static struct configfs_item_operations target_core_fabric_item_ops = {
 100         .show_attribute = target_core_attr_show,
 101 };
 102
 103 static struct configfs_attribute target_core_item_attr_version = {
 104         .ca_owner       = THIS_MODULE,
 105         .ca_name        = "version",
 106         .ca_mode        = S_IRUGO,
 107 };
 108
 109 static struct target_fabric_configfs *target_core_get_fabric(
 110         const char *name)
 111 {
 112         struct target_fabric_configfs *tf;
 113
 114         if (!name)
 115                 return NULL;
 116
 117         mutex_lock(&g_tf_lock);
 118         list_for_each_entry(tf, &g_tf_list, tf_list) {
 119                 if (!strcmp(tf->tf_name, name)) {
 120                         atomic_inc(&tf->tf_access_cnt);
 121                         mutex_unlock(&g_tf_lock);
 122                         return tf;
 123                 }
 124         }
 125         mutex_unlock(&g_tf_lock);
 126
 127         return NULL;
 128 }
 129
 130 /*
 131  * Called from struct target_core_group_ops->make_group()
 132  */
 133 static struct config_group *target_core_register_fabric(
 134         struct config_group *group,
 135         const char *name)
 136 {
 137         struct target_fabric_configfs *tf;
 138         int ret;
 139
 140         pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
 141                         " %s\n", group, name);
 142
 143         tf = target_core_get_fabric(name);
 144         if (!tf) {
 145                 pr_err("target_core_register_fabric() trying autoload for %s\n",
 146                         name);
 147
 148                 /*
 149                  * Below are some hardcoded request_module() calls to automatically
 150                  * local fabric modules when the following is called:
 151                  *
 152                  * mkdir -p /sys/kernel/config/target/$MODULE_NAME
 153                  *
 154                  * Note that this does not limit which TCM fabric module can be
 155                  * registered, but simply provids auto loading logic for modules with
 156                  * mkdir(2) system calls with known TCM fabric modules.
 157                  */
 158
 159                 if (!strncmp(name, "iscsi", 5)) {
 160                         /*
 161                          * Automatically load the LIO Target fabric module when the
 162                          * following is called:
 163                          *
 164                          * mkdir -p $CONFIGFS/target/iscsi
 165                          */
 166                         ret = request_module("iscsi_target_mod");
 167                         if (ret < 0) {
 168                                 pr_err("request_module() failed for"
 169                                        " iscsi_target_mod.ko: %d\n", ret);
 170                                 return ERR_PTR(-EINVAL);
 171                         }
 172                 } else if (!strncmp(name, "loopback", 8)) {
 173                         /*
 174                          * Automatically load the tcm_loop fabric module when the
 175                          * following is called:
 176                          *
 177                          * mkdir -p $CONFIGFS/target/loopback
 178                          */
 179                         ret = request_module("tcm_loop");
 180                         if (ret < 0) {
 181                                 pr_err("request_module() failed for"
 182                                        " tcm_loop.ko: %d\n", ret);
 183                                 return ERR_PTR(-EINVAL);
 184                         }
 185                 }
 186
 187                 tf = target_core_get_fabric(name);
 188         }
 189
 190         if (!tf) {
 191                 pr_err("target_core_get_fabric() failed for %s\n",
 192                        name);
 193                 return ERR_PTR(-EINVAL);
 194         }
 195         pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
 196                         " %s\n", tf->tf_name);
 197         /*
 198          * On a successful target_core_get_fabric() look, the returned
 199          * struct target_fabric_configfs *tf will contain a usage reference.
 200          */
 201         pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
 202                         &tf->tf_cit_tmpl.tfc_wwn_cit);
 203
 204         tf->tf_group.default_groups = tf->tf_default_groups;
 205         tf->tf_group.default_groups[0] = &tf->tf_disc_group;
 206         tf->tf_group.default_groups[1] = NULL;
 207
 208         config_group_init_type_name(&tf->tf_group, name,
 209                         &tf->tf_cit_tmpl.tfc_wwn_cit);
 210         config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
 211                         &tf->tf_cit_tmpl.tfc_discovery_cit);
 212
 213         pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
 214                         " %s\n", tf->tf_group.cg_item.ci_name);
 215         /*
 216          * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
 217          */
 218         tf->tf_ops.tf_subsys = tf->tf_subsys;
 219         tf->tf_fabric = &tf->tf_group.cg_item;
 220         pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
 221                         " for %s\n", name);
 222
 223         return &tf->tf_group;
 224 }
 225
 226 /*
 227  * Called from struct target_core_group_ops->drop_item()
 228  */
 229 static void target_core_deregister_fabric(
 230         struct config_group *group,
 231         struct config_item *item)
 232 {
 233         struct target_fabric_configfs *tf = container_of(
 234                 to_config_group(item), struct target_fabric_configfs, tf_group);
 235         struct config_group *tf_group;
 236         struct config_item *df_item;
 237         int i;
 238
 239         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
 240                 " tf list\n", config_item_name(item));
 241
 242         pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
 243                         " %s\n", tf->tf_name);
 244         atomic_dec(&tf->tf_access_cnt);
 245
 246         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
 247                         " tf->tf_fabric for %s\n", tf->tf_name);
 248         tf->tf_fabric = NULL;
 249
 250         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
 251                         " %s\n", config_item_name(item));
 252
 253         tf_group = &tf->tf_group;
 254         for (i = 0; tf_group->default_groups[i]; i++) {
 255                 df_item = &tf_group->default_groups[i]->cg_item;
 256                 tf_group->default_groups[i] = NULL;
 257                 config_item_put(df_item);
 258         }
 259         config_item_put(item);
 260 }
 261
 262 static struct configfs_group_operations target_core_fabric_group_ops = {
 263         .make_group     = &target_core_register_fabric,
 264         .drop_item      = &target_core_deregister_fabric,
 265 };
 266
 267 /*
 268  * All item attributes appearing in /sys/kernel/target/ appear here.
 269  */
 270 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
 271         &target_core_item_attr_version,
 272         NULL,
 273 };
 274
 275 /*
 276  * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
 277  */
 278 static struct config_item_type target_core_fabrics_item = {
 279         .ct_item_ops    = &target_core_fabric_item_ops,
 280         .ct_group_ops   = &target_core_fabric_group_ops,
 281         .ct_attrs       = target_core_fabric_item_attrs,
 282         .ct_owner       = THIS_MODULE,
 283 };
 284
 285 static struct configfs_subsystem target_core_fabrics = {
 286         .su_group = {
 287                 .cg_item = {
 288                         .ci_namebuf = "target",
 289                         .ci_type = &target_core_fabrics_item,
 290                 },
 291         },
 292 };
 293
 294 struct configfs_subsystem *target_core_subsystem[] = {
 295         &target_core_fabrics,
 296         NULL,
 297 };
 298
 299 /*##############################################################################
 300 // Start functions called by external Target Fabrics Modules
 301 //############################################################################*/
 302
 303 /*
 304  * First function called by fabric modules to:
 305  *
 306  * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
 307  * 2) Add struct target_fabric_configfs to g_tf_list
 308  * 3) Return struct target_fabric_configfs to fabric module to be passed
 309  *    into target_fabric_configfs_register().
 310  */
 311 struct target_fabric_configfs *target_fabric_configfs_init(
 312         struct module *fabric_mod,
 313         const char *name)
 314 {
 315         struct target_fabric_configfs *tf;
 316
 317         if (!(name)) {
 318                 pr_err("Unable to locate passed fabric name\n");
 319                 return ERR_PTR(-EINVAL);
 320         }
 321         if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
 322                 pr_err("Passed name: %s exceeds TARGET_FABRIC"
 323                         "_NAME_SIZE\n", name);
 324                 return ERR_PTR(-EINVAL);
 325         }
 326
 327         tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
 328         if (!tf)
 329                 return ERR_PTR(-ENOMEM);
 330
 331         INIT_LIST_HEAD(&tf->tf_list);
 332         atomic_set(&tf->tf_access_cnt, 0);
 333         /*
 334          * Setup the default generic struct config_item_type's (cits) in
 335          * struct target_fabric_configfs->tf_cit_tmpl
 336          */
 337         tf->tf_module = fabric_mod;
 338         target_fabric_setup_cits(tf);
 339
 340         tf->tf_subsys = target_core_subsystem[0];
 341         snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
 342
 343         mutex_lock(&g_tf_lock);
 344         list_add_tail(&tf->tf_list, &g_tf_list);
 345         mutex_unlock(&g_tf_lock);
 346
 347         pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
 348                         ">>>>>>>>>>>>>>\n");
 349         pr_debug("Initialized struct target_fabric_configfs: %p for"
 350                         " %s\n", tf, tf->tf_name);
 351         return tf;
 352 }
 353 EXPORT_SYMBOL(target_fabric_configfs_init);
 354
 355 /*
 356  * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
 357  */
 358 void target_fabric_configfs_free(
 359         struct target_fabric_configfs *tf)
 360 {
 361         mutex_lock(&g_tf_lock);
 362         list_del(&tf->tf_list);
 363         mutex_unlock(&g_tf_lock);
 364
 365         kfree(tf);
 366 }
 367 EXPORT_SYMBOL(target_fabric_configfs_free);
 368
 369 /*
 370  * Perform a sanity check of the passed tf->tf_ops before completing
 371  * TCM fabric module registration.
 372  */
 373 static int target_fabric_tf_ops_check(
 374         struct target_fabric_configfs *tf)
 375 {
 376         struct target_core_fabric_ops *tfo = &tf->tf_ops;
 377
 378         if (!tfo->get_fabric_name) {
 379                 pr_err("Missing tfo->get_fabric_name()\n");
 380                 return -EINVAL;
 381         }
 382         if (!tfo->get_fabric_proto_ident) {
 383                 pr_err("Missing tfo->get_fabric_proto_ident()\n");
 384                 return -EINVAL;
 385         }
 386         if (!tfo->tpg_get_wwn) {
 387                 pr_err("Missing tfo->tpg_get_wwn()\n");
 388                 return -EINVAL;
 389         }
 390         if (!tfo->tpg_get_tag) {
 391                 pr_err("Missing tfo->tpg_get_tag()\n");
 392                 return -EINVAL;
 393         }
 394         if (!tfo->tpg_get_default_depth) {
 395                 pr_err("Missing tfo->tpg_get_default_depth()\n");
 396                 return -EINVAL;
 397         }
 398         if (!tfo->tpg_get_pr_transport_id) {
 399                 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
 400                 return -EINVAL;
 401         }
 402         if (!tfo->tpg_get_pr_transport_id_len) {
 403                 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
 404                 return -EINVAL;
 405         }
 406         if (!tfo->tpg_check_demo_mode) {
 407                 pr_err("Missing tfo->tpg_check_demo_mode()\n");
 408                 return -EINVAL;
 409         }
 410         if (!tfo->tpg_check_demo_mode_cache) {
 411                 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
 412                 return -EINVAL;
 413         }
 414         if (!tfo->tpg_check_demo_mode_write_protect) {
 415                 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
 416                 return -EINVAL;
 417         }
 418         if (!tfo->tpg_check_prod_mode_write_protect) {
 419                 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
 420                 return -EINVAL;
 421         }
 422         if (!tfo->tpg_alloc_fabric_acl) {
 423                 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
 424                 return -EINVAL;
 425         }
 426         if (!tfo->tpg_release_fabric_acl) {
 427                 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
 428                 return -EINVAL;
 429         }
 430         if (!tfo->tpg_get_inst_index) {
 431                 pr_err("Missing tfo->tpg_get_inst_index()\n");
 432                 return -EINVAL;
 433         }
 434         if (!tfo->release_cmd) {
 435                 pr_err("Missing tfo->release_cmd()\n");
 436                 return -EINVAL;
 437         }
 438         if (!tfo->shutdown_session) {
 439                 pr_err("Missing tfo->shutdown_session()\n");
 440                 return -EINVAL;
 441         }
 442         if (!tfo->close_session) {
 443                 pr_err("Missing tfo->close_session()\n");
 444                 return -EINVAL;
 445         }
 446         if (!tfo->sess_get_index) {
 447                 pr_err("Missing tfo->sess_get_index()\n");
 448                 return -EINVAL;
 449         }
 450         if (!tfo->write_pending) {
 451                 pr_err("Missing tfo->write_pending()\n");
 452                 return -EINVAL;
 453         }
 454         if (!tfo->write_pending_status) {
 455                 pr_err("Missing tfo->write_pending_status()\n");
 456                 return -EINVAL;
 457         }
 458         if (!tfo->set_default_node_attributes) {
 459                 pr_err("Missing tfo->set_default_node_attributes()\n");
 460                 return -EINVAL;
 461         }
 462         if (!tfo->get_task_tag) {
 463                 pr_err("Missing tfo->get_task_tag()\n");
 464                 return -EINVAL;
 465         }
 466         if (!tfo->get_cmd_state) {
 467                 pr_err("Missing tfo->get_cmd_state()\n");
 468                 return -EINVAL;
 469         }
 470         if (!tfo->queue_data_in) {
 471                 pr_err("Missing tfo->queue_data_in()\n");
 472                 return -EINVAL;
 473         }
 474         if (!tfo->queue_status) {
 475                 pr_err("Missing tfo->queue_status()\n");
 476                 return -EINVAL;
 477         }
 478         if (!tfo->queue_tm_rsp) {
 479                 pr_err("Missing tfo->queue_tm_rsp()\n");
 480                 return -EINVAL;
 481         }
 482         if (!tfo->aborted_task) {
 483                 pr_err("Missing tfo->aborted_task()\n");
 484                 return -EINVAL;
 485         }
 486         /*
 487          * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
 488          * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
 489          * target_core_fabric_configfs.c WWN+TPG group context code.
 490          */
 491         if (!tfo->fabric_make_wwn) {
 492                 pr_err("Missing tfo->fabric_make_wwn()\n");
 493                 return -EINVAL;
 494         }
 495         if (!tfo->fabric_drop_wwn) {
 496                 pr_err("Missing tfo->fabric_drop_wwn()\n");
 497                 return -EINVAL;
 498         }
 499         if (!tfo->fabric_make_tpg) {
 500                 pr_err("Missing tfo->fabric_make_tpg()\n");
 501                 return -EINVAL;
 502         }
 503         if (!tfo->fabric_drop_tpg) {
 504                 pr_err("Missing tfo->fabric_drop_tpg()\n");
 505                 return -EINVAL;
 506         }
 507
 508         return 0;
 509 }
 510
 511 /*
 512  * Called 2nd from fabric module with returned parameter of
 513  * struct target_fabric_configfs * from target_fabric_configfs_init().
 514  *
 515  * Upon a successful registration, the new fabric's struct config_item is
 516  * return.  Also, a pointer to this struct is set in the passed
 517  * struct target_fabric_configfs.
 518  */
 519 int target_fabric_configfs_register(
 520         struct target_fabric_configfs *tf)
 521 {
 522         int ret;
 523
 524         if (!tf) {
 525                 pr_err("Unable to locate target_fabric_configfs"
 526                         " pointer\n");
 527                 return -EINVAL;
 528         }
 529         if (!tf->tf_subsys) {
 530                 pr_err("Unable to target struct config_subsystem"
 531                         " pointer\n");
 532                 return -EINVAL;
 533         }
 534         ret = target_fabric_tf_ops_check(tf);
 535         if (ret < 0)
 536                 return ret;
 537
 538         pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
 539                 ">>>>>>>>>>\n");
 540         return 0;
 541 }
 542 EXPORT_SYMBOL(target_fabric_configfs_register);
 543
 544 void target_fabric_configfs_deregister(
 545         struct target_fabric_configfs *tf)
 546 {
 547         struct configfs_subsystem *su;
 548
 549         if (!tf) {
 550                 pr_err("Unable to locate passed target_fabric_"
 551                         "configfs\n");
 552                 return;
 553         }
 554         su = tf->tf_subsys;
 555         if (!su) {
 556                 pr_err("Unable to locate passed tf->tf_subsys"
 557                         " pointer\n");
 558                 return;
 559         }
 560         pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
 561                         ">>>>>>>>>>>>\n");
 562         mutex_lock(&g_tf_lock);
 563         if (atomic_read(&tf->tf_access_cnt)) {
 564                 mutex_unlock(&g_tf_lock);
 565                 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
 566                         tf->tf_name);
 567                 BUG();
 568         }
 569         list_del(&tf->tf_list);
 570         mutex_unlock(&g_tf_lock);
 571
 572         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
 573                         " %s\n", tf->tf_name);
 574         tf->tf_module = NULL;
 575         tf->tf_subsys = NULL;
 576         kfree(tf);
 577
 578         pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
 579                         ">>>>>\n");
 580 }
 581 EXPORT_SYMBOL(target_fabric_configfs_deregister);
 582
 583 /*##############################################################################
 584 // Stop functions called by external Target Fabrics Modules
 585 //############################################################################*/
 586
 587 /* Start functions for struct config_item_type tb_dev_attrib_cit */
 588
 589 #define DEF_DEV_ATTRIB_SHOW(_name)                                      \
 590 static ssize_t target_core_dev_show_attr_##_name(                       \
 591         struct se_dev_attrib *da,                                       \
 592         char *page)                                                     \
 593 {                                                                       \
 594         return snprintf(page, PAGE_SIZE, "%u\n",                        \
 595                 (u32)da->da_dev->dev_attrib._name);                     \
 596 }
 597
 598 #define DEF_DEV_ATTRIB_STORE(_name)                                     \
 599 static ssize_t target_core_dev_store_attr_##_name(                      \
 600         struct se_dev_attrib *da,                                       \
 601         const char *page,                                               \
 602         size_t count)                                                   \
 603 {                                                                       \
 604         unsigned long val;                                              \
 605         int ret;                                                        \
 606                                                                         \
 607         ret = kstrtoul(page, 0, &val);                          \
 608         if (ret < 0) {                                                  \
 609                 pr_err("kstrtoul() failed with"         \
 610                         " ret: %d\n", ret);                             \
 611                 return -EINVAL;                                         \
 612         }                                                               \
 613         ret = se_dev_set_##_name(da->da_dev, (u32)val);                 \
 614                                                                         \
 615         return (!ret) ? count : -EINVAL;                                \
 616 }
 617
 618 #define DEF_DEV_ATTRIB(_name)                                           \
 619 DEF_DEV_ATTRIB_SHOW(_name);                                             \
 620 DEF_DEV_ATTRIB_STORE(_name);
 621
 622 #define DEF_DEV_ATTRIB_RO(_name)                                        \
 623 DEF_DEV_ATTRIB_SHOW(_name);
 624
 625 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
 626 #define SE_DEV_ATTR(_name, _mode)                                       \
 627 static struct target_core_dev_attrib_attribute                          \
 628                         target_core_dev_attrib_##_name =                \
 629                 __CONFIGFS_EATTR(_name, _mode,                          \
 630                 target_core_dev_show_attr_##_name,                      \
 631                 target_core_dev_store_attr_##_name);
 632
 633 #define SE_DEV_ATTR_RO(_name);                                          \
 634 static struct target_core_dev_attrib_attribute                          \
 635                         target_core_dev_attrib_##_name =                \
 636         __CONFIGFS_EATTR_RO(_name,                                      \
 637         target_core_dev_show_attr_##_name);
 638
 639 DEF_DEV_ATTRIB(emulate_model_alias);
 640 SE_DEV_ATTR(emulate_model_alias, S_IRUGO | S_IWUSR);
 641
 642 DEF_DEV_ATTRIB(emulate_dpo);
 643 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
 644
 645 DEF_DEV_ATTRIB(emulate_fua_write);
 646 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
 647
 648 DEF_DEV_ATTRIB(emulate_fua_read);
 649 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
 650
 651 DEF_DEV_ATTRIB(emulate_write_cache);
 652 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
 653
 654 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
 655 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
 656
 657 DEF_DEV_ATTRIB(emulate_tas);
 658 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
 659
 660 DEF_DEV_ATTRIB(emulate_tpu);
 661 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
 662
 663 DEF_DEV_ATTRIB(emulate_tpws);
 664 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
 665
 666 DEF_DEV_ATTRIB(emulate_caw);
 667 SE_DEV_ATTR(emulate_caw, S_IRUGO | S_IWUSR);
 668
 669 DEF_DEV_ATTRIB(emulate_3pc);
 670 SE_DEV_ATTR(emulate_3pc, S_IRUGO | S_IWUSR);
 671
 672 DEF_DEV_ATTRIB(pi_prot_type);
 673 SE_DEV_ATTR(pi_prot_type, S_IRUGO | S_IWUSR);
 674
 675 DEF_DEV_ATTRIB_RO(hw_pi_prot_type);
 676 SE_DEV_ATTR_RO(hw_pi_prot_type);
 677
 678 DEF_DEV_ATTRIB(pi_prot_format);
 679 SE_DEV_ATTR(pi_prot_format, S_IRUGO | S_IWUSR);
 680
 681 DEF_DEV_ATTRIB(enforce_pr_isids);
 682 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
 683
 684 DEF_DEV_ATTRIB(is_nonrot);
 685 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
 686
 687 DEF_DEV_ATTRIB(emulate_rest_reord);
 688 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
 689
 690 DEF_DEV_ATTRIB(force_pr_aptpl);
 691 SE_DEV_ATTR(force_pr_aptpl, S_IRUGO | S_IWUSR);
 692
 693 DEF_DEV_ATTRIB_RO(hw_block_size);
 694 SE_DEV_ATTR_RO(hw_block_size);
 695
 696 DEF_DEV_ATTRIB(block_size);
 697 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
 698
 699 DEF_DEV_ATTRIB_RO(hw_max_sectors);
 700 SE_DEV_ATTR_RO(hw_max_sectors);
 701
 702 DEF_DEV_ATTRIB(fabric_max_sectors);
 703 SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR);
 704
 705 DEF_DEV_ATTRIB(optimal_sectors);
 706 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
 707
 708 DEF_DEV_ATTRIB_RO(hw_queue_depth);
 709 SE_DEV_ATTR_RO(hw_queue_depth);
 710
 711 DEF_DEV_ATTRIB(queue_depth);
 712 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
 713
 714 DEF_DEV_ATTRIB(max_unmap_lba_count);
 715 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
 716
 717 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
 718 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
 719
 720 DEF_DEV_ATTRIB(unmap_granularity);
 721 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
 722
 723 DEF_DEV_ATTRIB(unmap_granularity_alignment);
 724 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
 725
 726 DEF_DEV_ATTRIB(max_write_same_len);
 727 SE_DEV_ATTR(max_write_same_len, S_IRUGO | S_IWUSR);
 728
 729 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
 730
 731 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
 732         &target_core_dev_attrib_emulate_model_alias.attr,
 733         &target_core_dev_attrib_emulate_dpo.attr,
 734         &target_core_dev_attrib_emulate_fua_write.attr,
 735         &target_core_dev_attrib_emulate_fua_read.attr,
 736         &target_core_dev_attrib_emulate_write_cache.attr,
 737         &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
 738         &target_core_dev_attrib_emulate_tas.attr,
 739         &target_core_dev_attrib_emulate_tpu.attr,
 740         &target_core_dev_attrib_emulate_tpws.attr,
 741         &target_core_dev_attrib_emulate_caw.attr,
 742         &target_core_dev_attrib_emulate_3pc.attr,
 743         &target_core_dev_attrib_pi_prot_type.attr,
 744         &target_core_dev_attrib_hw_pi_prot_type.attr,
 745         &target_core_dev_attrib_pi_prot_format.attr,
 746         &target_core_dev_attrib_enforce_pr_isids.attr,
 747         &target_core_dev_attrib_force_pr_aptpl.attr,
 748         &target_core_dev_attrib_is_nonrot.attr,
 749         &target_core_dev_attrib_emulate_rest_reord.attr,
 750         &target_core_dev_attrib_hw_block_size.attr,
 751         &target_core_dev_attrib_block_size.attr,
 752         &target_core_dev_attrib_hw_max_sectors.attr,
 753         &target_core_dev_attrib_fabric_max_sectors.attr,
 754         &target_core_dev_attrib_optimal_sectors.attr,
 755         &target_core_dev_attrib_hw_queue_depth.attr,
 756         &target_core_dev_attrib_queue_depth.attr,
 757         &target_core_dev_attrib_max_unmap_lba_count.attr,
 758         &target_core_dev_attrib_max_unmap_block_desc_count.attr,
 759         &target_core_dev_attrib_unmap_granularity.attr,
 760         &target_core_dev_attrib_unmap_granularity_alignment.attr,
 761         &target_core_dev_attrib_max_write_same_len.attr,
 762         NULL,
 763 };
 764
 765 static struct configfs_item_operations target_core_dev_attrib_ops = {
 766         .show_attribute         = target_core_dev_attrib_attr_show,
 767         .store_attribute        = target_core_dev_attrib_attr_store,
 768 };
 769
 770 TB_CIT_SETUP(dev_attrib, &target_core_dev_attrib_ops, NULL,
 771              target_core_dev_attrib_attrs);
 772
 773 /* End functions for struct config_item_type tb_dev_attrib_cit */
 774
 775 /*  Start functions for struct config_item_type target_core_dev_wwn_cit */
 776
 777 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
 778 #define SE_DEV_WWN_ATTR(_name, _mode)                                   \
 779 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
 780                 __CONFIGFS_EATTR(_name, _mode,                          \
 781                 target_core_dev_wwn_show_attr_##_name,                  \
 782                 target_core_dev_wwn_store_attr_##_name);
 783
 784 #define SE_DEV_WWN_ATTR_RO(_name);                                      \
 785 do {                                                                    \
 786         static struct target_core_dev_wwn_attribute                     \
 787                         target_core_dev_wwn_##_name =                   \
 788                 __CONFIGFS_EATTR_RO(_name,                              \
 789                 target_core_dev_wwn_show_attr_##_name);                 \
 790 } while (0);
 791
 792 /*
 793  * VPD page 0x80 Unit serial
 794  */
 795 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
 796         struct t10_wwn *t10_wwn,
 797         char *page)
 798 {
 799         return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
 800                 &t10_wwn->unit_serial[0]);
 801 }
 802
 803 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
 804         struct t10_wwn *t10_wwn,
 805         const char *page,
 806         size_t count)
 807 {
 808         struct se_device *dev = t10_wwn->t10_dev;
 809         unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
 810
 811         /*
 812          * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
 813          * from the struct scsi_device level firmware, do not allow
 814          * VPD Unit Serial to be emulated.
 815          *
 816          * Note this struct scsi_device could also be emulating VPD
 817          * information from its drivers/scsi LLD.  But for now we assume
 818          * it is doing 'the right thing' wrt a world wide unique
 819          * VPD Unit Serial Number that OS dependent multipath can depend on.
 820          */
 821         if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
 822                 pr_err("Underlying SCSI device firmware provided VPD"
 823                         " Unit Serial, ignoring request\n");
 824                 return -EOPNOTSUPP;
 825         }
 826
 827         if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
 828                 pr_err("Emulated VPD Unit Serial exceeds"
 829                 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
 830                 return -EOVERFLOW;
 831         }
 832         /*
 833          * Check to see if any active $FABRIC_MOD exports exist.  If they
 834          * do exist, fail here as changing this information on the fly
 835          * (underneath the initiator side OS dependent multipath code)
 836          * could cause negative effects.
 837          */
 838         if (dev->export_count) {
 839                 pr_err("Unable to set VPD Unit Serial while"
 840                         " active %d $FABRIC_MOD exports exist\n",
 841                         dev->export_count);
 842                 return -EINVAL;
 843         }
 844
 845         /*
 846          * This currently assumes ASCII encoding for emulated VPD Unit Serial.
 847          *
 848          * Also, strip any newline added from the userspace
 849          * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
 850          */
 851         memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
 852         snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
 853         snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
 854                         "%s", strstrip(buf));
 855         dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
 856
 857         pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
 858                         " %s\n", dev->t10_wwn.unit_serial);
 859
 860         return count;
 861 }
 862
 863 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
 864
 865 /*
 866  * VPD page 0x83 Protocol Identifier
 867  */
 868 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
 869         struct t10_wwn *t10_wwn,
 870         char *page)
 871 {
 872         struct t10_vpd *vpd;
 873         unsigned char buf[VPD_TMP_BUF_SIZE];
 874         ssize_t len = 0;
 875
 876         memset(buf, 0, VPD_TMP_BUF_SIZE);
 877
 878         spin_lock(&t10_wwn->t10_vpd_lock);
 879         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
 880                 if (!vpd->protocol_identifier_set)
 881                         continue;
 882
 883                 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
 884
 885                 if (len + strlen(buf) >= PAGE_SIZE)
 886                         break;
 887
 888                 len += sprintf(page+len, "%s", buf);
 889         }
 890         spin_unlock(&t10_wwn->t10_vpd_lock);
 891
 892         return len;
 893 }
 894
 895 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
 896         struct t10_wwn *t10_wwn,
 897         const char *page,
 898         size_t count)
 899 {
 900         return -ENOSYS;
 901 }
 902
 903 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
 904
 905 /*
 906  * Generic wrapper for dumping VPD identifiers by association.
 907  */
 908 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc)                           \
 909 static ssize_t target_core_dev_wwn_show_attr_##_name(                   \
 910         struct t10_wwn *t10_wwn,                                        \
 911         char *page)                                                     \
 912 {                                                                       \
 913         struct t10_vpd *vpd;                                                    \
 914         unsigned char buf[VPD_TMP_BUF_SIZE];                            \
 915         ssize_t len = 0;                                                \
 916                                                                         \
 917         spin_lock(&t10_wwn->t10_vpd_lock);                              \
 918         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {    \
 919                 if (vpd->association != _assoc)                         \
 920                         continue;                                       \
 921                                                                         \
 922                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 923                 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE);   \
 924                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 925                         break;                                          \
 926                 len += sprintf(page+len, "%s", buf);                    \
 927                                                                         \
 928                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 929                 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
 930                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 931                         break;                                          \
 932                 len += sprintf(page+len, "%s", buf);                    \
 933                                                                         \
 934                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 935                 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
 936                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 937                         break;                                          \
 938                 len += sprintf(page+len, "%s", buf);                    \
 939         }                                                               \
 940         spin_unlock(&t10_wwn->t10_vpd_lock);                            \
 941                                                                         \
 942         return len;                                                     \
 943 }
 944
 945 /*
 946  * VPD page 0x83 Association: Logical Unit
 947  */
 948 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
 949
 950 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
 951         struct t10_wwn *t10_wwn,
 952         const char *page,
 953         size_t count)
 954 {
 955         return -ENOSYS;
 956 }
 957
 958 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
 959
 960 /*
 961  * VPD page 0x83 Association: Target Port
 962  */
 963 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
 964
 965 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
 966         struct t10_wwn *t10_wwn,
 967         const char *page,
 968         size_t count)
 969 {
 970         return -ENOSYS;
 971 }
 972
 973 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
 974
 975 /*
 976  * VPD page 0x83 Association: SCSI Target Device
 977  */
 978 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
 979
 980 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
 981         struct t10_wwn *t10_wwn,
 982         const char *page,
 983         size_t count)
 984 {
 985         return -ENOSYS;
 986 }
 987
 988 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
 989
 990 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
 991
 992 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
 993         &target_core_dev_wwn_vpd_unit_serial.attr,
 994         &target_core_dev_wwn_vpd_protocol_identifier.attr,
 995         &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
 996         &target_core_dev_wwn_vpd_assoc_target_port.attr,
 997         &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
 998         NULL,
 999 };
1000
1001 static struct configfs_item_operations target_core_dev_wwn_ops = {
1002         .show_attribute         = target_core_dev_wwn_attr_show,
1003         .store_attribute        = target_core_dev_wwn_attr_store,
1004 };
1005
1006 static struct config_item_type target_core_dev_wwn_cit = {
1007         .ct_item_ops            = &target_core_dev_wwn_ops,
1008         .ct_attrs               = target_core_dev_wwn_attrs,
1009         .ct_owner               = THIS_MODULE,
1010 };
1011
1012 /*  End functions for struct config_item_type target_core_dev_wwn_cit */
1013
1014 /*  Start functions for struct config_item_type tb_dev_pr_cit */
1015
1016 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
1017 #define SE_DEV_PR_ATTR(_name, _mode)                                    \
1018 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1019         __CONFIGFS_EATTR(_name, _mode,                                  \
1020         target_core_dev_pr_show_attr_##_name,                           \
1021         target_core_dev_pr_store_attr_##_name);
1022
1023 #define SE_DEV_PR_ATTR_RO(_name);                                       \
1024 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1025         __CONFIGFS_EATTR_RO(_name,                                      \
1026         target_core_dev_pr_show_attr_##_name);
1027
1028 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1029                 char *page)
1030 {
1031         struct se_node_acl *se_nacl;
1032         struct t10_pr_registration *pr_reg;
1033         char i_buf[PR_REG_ISID_ID_LEN];
1034
1035         memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1036
1037         pr_reg = dev->dev_pr_res_holder;
1038         if (!pr_reg)
1039                 return sprintf(page, "No SPC-3 Reservation holder\n");
1040
1041         se_nacl = pr_reg->pr_reg_nacl;
1042         core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1043
1044         return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1045                 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1046                 se_nacl->initiatorname, i_buf);
1047 }
1048
1049 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1050                 char *page)
1051 {
1052         struct se_node_acl *se_nacl;
1053         ssize_t len;
1054
1055         se_nacl = dev->dev_reserved_node_acl;
1056         if (se_nacl) {
1057                 len = sprintf(page,
1058                               "SPC-2 Reservation: %s Initiator: %s\n",
1059                               se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1060                               se_nacl->initiatorname);
1061         } else {
1062                 len = sprintf(page, "No SPC-2 Reservation holder\n");
1063         }
1064         return len;
1065 }
1066
1067 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
1068                 char *page)
1069 {
1070         int ret;
1071
1072         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1073                 return sprintf(page, "Passthrough\n");
1074
1075         spin_lock(&dev->dev_reservation_lock);
1076         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1077                 ret = target_core_dev_pr_show_spc2_res(dev, page);
1078         else
1079                 ret = target_core_dev_pr_show_spc3_res(dev, page);
1080         spin_unlock(&dev->dev_reservation_lock);
1081         return ret;
1082 }
1083
1084 SE_DEV_PR_ATTR_RO(res_holder);
1085
1086 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1087                 struct se_device *dev, char *page)
1088 {
1089         ssize_t len = 0;
1090
1091         spin_lock(&dev->dev_reservation_lock);
1092         if (!dev->dev_pr_res_holder) {
1093                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1094         } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1095                 len = sprintf(page, "SPC-3 Reservation: All Target"
1096                         " Ports registration\n");
1097         } else {
1098                 len = sprintf(page, "SPC-3 Reservation: Single"
1099                         " Target Port registration\n");
1100         }
1101
1102         spin_unlock(&dev->dev_reservation_lock);
1103         return len;
1104 }
1105
1106 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1107
1108 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1109                 struct se_device *dev, char *page)
1110 {
1111         return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
1112 }
1113
1114 SE_DEV_PR_ATTR_RO(res_pr_generation);
1115
1116 /*
1117  * res_pr_holder_tg_port
1118  */
1119 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1120                 struct se_device *dev, char *page)
1121 {
1122         struct se_node_acl *se_nacl;
1123         struct se_lun *lun;
1124         struct se_portal_group *se_tpg;
1125         struct t10_pr_registration *pr_reg;
1126         struct target_core_fabric_ops *tfo;
1127         ssize_t len = 0;
1128
1129         spin_lock(&dev->dev_reservation_lock);
1130         pr_reg = dev->dev_pr_res_holder;
1131         if (!pr_reg) {
1132                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1133                 goto out_unlock;
1134         }
1135
1136         se_nacl = pr_reg->pr_reg_nacl;
1137         se_tpg = se_nacl->se_tpg;
1138         lun = pr_reg->pr_reg_tg_pt_lun;
1139         tfo = se_tpg->se_tpg_tfo;
1140
1141         len += sprintf(page+len, "SPC-3 Reservation: %s"
1142                 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1143                 tfo->tpg_get_wwn(se_tpg));
1144         len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1145                 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1146                 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1147                 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1148                 tfo->get_fabric_name(), lun->unpacked_lun);
1149
1150 out_unlock:
1151         spin_unlock(&dev->dev_reservation_lock);
1152         return len;
1153 }
1154
1155 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1156
1157 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1158                 struct se_device *dev, char *page)
1159 {
1160         struct target_core_fabric_ops *tfo;
1161         struct t10_pr_registration *pr_reg;
1162         unsigned char buf[384];
1163         char i_buf[PR_REG_ISID_ID_LEN];
1164         ssize_t len = 0;
1165         int reg_count = 0;
1166
1167         len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1168
1169         spin_lock(&dev->t10_pr.registration_lock);
1170         list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1171                         pr_reg_list) {
1172
1173                 memset(buf, 0, 384);
1174                 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1175                 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1176                 core_pr_dump_initiator_port(pr_reg, i_buf,
1177                                         PR_REG_ISID_ID_LEN);
1178                 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1179                         tfo->get_fabric_name(),
1180                         pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1181                         pr_reg->pr_res_generation);
1182
1183                 if (len + strlen(buf) >= PAGE_SIZE)
1184                         break;
1185
1186                 len += sprintf(page+len, "%s", buf);
1187                 reg_count++;
1188         }
1189         spin_unlock(&dev->t10_pr.registration_lock);
1190
1191         if (!reg_count)
1192                 len += sprintf(page+len, "None\n");
1193
1194         return len;
1195 }
1196
1197 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1198
1199 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1200                 struct se_device *dev, char *page)
1201 {
1202         struct t10_pr_registration *pr_reg;
1203         ssize_t len = 0;
1204
1205         spin_lock(&dev->dev_reservation_lock);
1206         pr_reg = dev->dev_pr_res_holder;
1207         if (pr_reg) {
1208                 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1209                         core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1210         } else {
1211                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1212         }
1213
1214         spin_unlock(&dev->dev_reservation_lock);
1215         return len;
1216 }
1217
1218 SE_DEV_PR_ATTR_RO(res_pr_type);
1219
1220 static ssize_t target_core_dev_pr_show_attr_res_type(
1221                 struct se_device *dev, char *page)
1222 {
1223         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1224                 return sprintf(page, "SPC_PASSTHROUGH\n");
1225         else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1226                 return sprintf(page, "SPC2_RESERVATIONS\n");
1227         else
1228                 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1229 }
1230
1231 SE_DEV_PR_ATTR_RO(res_type);
1232
1233 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1234                 struct se_device *dev, char *page)
1235 {
1236         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1237                 return 0;
1238
1239         return sprintf(page, "APTPL Bit Status: %s\n",
1240                 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1241 }
1242
1243 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1244
1245 /*
1246  * res_aptpl_metadata
1247  */
1248 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1249                 struct se_device *dev, char *page)
1250 {
1251         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1252                 return 0;
1253
1254         return sprintf(page, "Ready to process PR APTPL metadata..\n");
1255 }
1256
1257 enum {
1258         Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1259         Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1260         Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1261         Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1262 };
1263
1264 static match_table_t tokens = {
1265         {Opt_initiator_fabric, "initiator_fabric=%s"},
1266         {Opt_initiator_node, "initiator_node=%s"},
1267         {Opt_initiator_sid, "initiator_sid=%s"},
1268         {Opt_sa_res_key, "sa_res_key=%s"},
1269         {Opt_res_holder, "res_holder=%d"},
1270         {Opt_res_type, "res_type=%d"},
1271         {Opt_res_scope, "res_scope=%d"},
1272         {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1273         {Opt_mapped_lun, "mapped_lun=%d"},
1274         {Opt_target_fabric, "target_fabric=%s"},
1275         {Opt_target_node, "target_node=%s"},
1276         {Opt_tpgt, "tpgt=%d"},
1277         {Opt_port_rtpi, "port_rtpi=%d"},
1278         {Opt_target_lun, "target_lun=%d"},
1279         {Opt_err, NULL}
1280 };
1281
1282 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1283         struct se_device *dev,
1284         const char *page,
1285         size_t count)
1286 {
1287         unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1288         unsigned char *t_fabric = NULL, *t_port = NULL;
1289         char *orig, *ptr, *opts;
1290         substring_t args[MAX_OPT_ARGS];
1291         unsigned long long tmp_ll;
1292         u64 sa_res_key = 0;
1293         u32 mapped_lun = 0, target_lun = 0;
1294         int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1295         u16 port_rpti = 0, tpgt = 0;
1296         u8 type = 0, scope;
1297
1298         if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1299                 return 0;
1300         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1301                 return 0;
1302
1303         if (dev->export_count) {
1304                 pr_debug("Unable to process APTPL metadata while"
1305                         " active fabric exports exist\n");
1306                 return -EINVAL;
1307         }
1308
1309         opts = kstrdup(page, GFP_KERNEL);
1310         if (!opts)
1311                 return -ENOMEM;
1312
1313         orig = opts;
1314         while ((ptr = strsep(&opts, ",\n")) != NULL) {
1315                 if (!*ptr)
1316                         continue;
1317
1318                 token = match_token(ptr, tokens, args);
1319                 switch (token) {
1320                 case Opt_initiator_fabric:
1321                         i_fabric = match_strdup(args);
1322                         if (!i_fabric) {
1323                                 ret = -ENOMEM;
1324                                 goto out;
1325                         }
1326                         break;
1327                 case Opt_initiator_node:
1328                         i_port = match_strdup(args);
1329                         if (!i_port) {
1330                                 ret = -ENOMEM;
1331                                 goto out;
1332                         }
1333                         if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1334                                 pr_err("APTPL metadata initiator_node="
1335                                         " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1336                                         PR_APTPL_MAX_IPORT_LEN);
1337                                 ret = -EINVAL;
1338                                 break;
1339                         }
1340                         break;
1341                 case Opt_initiator_sid:
1342                         isid = match_strdup(args);
1343                         if (!isid) {
1344                                 ret = -ENOMEM;
1345                                 goto out;
1346                         }
1347                         if (strlen(isid) >= PR_REG_ISID_LEN) {
1348                                 pr_err("APTPL metadata initiator_isid"
1349                                         "= exceeds PR_REG_ISID_LEN: %d\n",
1350                                         PR_REG_ISID_LEN);
1351                                 ret = -EINVAL;
1352                                 break;
1353                         }
1354                         break;
1355                 case Opt_sa_res_key:
1356                         ret = kstrtoull(args->from, 0, &tmp_ll);
1357                         if (ret < 0) {
1358                                 pr_err("kstrtoull() failed for sa_res_key=\n");
1359                                 goto out;
1360                         }
1361                         sa_res_key = (u64)tmp_ll;
1362                         break;
1363                 /*
1364                  * PR APTPL Metadata for Reservation
1365                  */
1366                 case Opt_res_holder:
1367                         match_int(args, &arg);
1368                         res_holder = arg;
1369                         break;
1370                 case Opt_res_type:
1371                         match_int(args, &arg);
1372                         type = (u8)arg;
1373                         break;
1374                 case Opt_res_scope:
1375                         match_int(args, &arg);
1376                         scope = (u8)arg;
1377                         break;
1378                 case Opt_res_all_tg_pt:
1379                         match_int(args, &arg);
1380                         all_tg_pt = (int)arg;
1381                         break;
1382                 case Opt_mapped_lun:
1383                         match_int(args, &arg);
1384                         mapped_lun = (u32)arg;
1385                         break;
1386                 /*
1387                  * PR APTPL Metadata for Target Port
1388                  */
1389                 case Opt_target_fabric:
1390                         t_fabric = match_strdup(args);
1391                         if (!t_fabric) {
1392                                 ret = -ENOMEM;
1393                                 goto out;
1394                         }
1395                         break;
1396                 case Opt_target_node:
1397                         t_port = match_strdup(args);
1398                         if (!t_port) {
1399                                 ret = -ENOMEM;
1400                                 goto out;
1401                         }
1402                         if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1403                                 pr_err("APTPL metadata target_node="
1404                                         " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1405                                         PR_APTPL_MAX_TPORT_LEN);
1406                                 ret = -EINVAL;
1407                                 break;
1408                         }
1409                         break;
1410                 case Opt_tpgt:
1411                         match_int(args, &arg);
1412                         tpgt = (u16)arg;
1413                         break;
1414                 case Opt_port_rtpi:
1415                         match_int(args, &arg);
1416                         port_rpti = (u16)arg;
1417                         break;
1418                 case Opt_target_lun:
1419                         match_int(args, &arg);
1420                         target_lun = (u32)arg;
1421                         break;
1422                 default:
1423                         break;
1424                 }
1425         }
1426
1427         if (!i_port || !t_port || !sa_res_key) {
1428                 pr_err("Illegal parameters for APTPL registration\n");
1429                 ret = -EINVAL;
1430                 goto out;
1431         }
1432
1433         if (res_holder && !(type)) {
1434                 pr_err("Illegal PR type: 0x%02x for reservation"
1435                                 " holder\n", type);
1436                 ret = -EINVAL;
1437                 goto out;
1438         }
1439
1440         ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1441                         i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1442                         res_holder, all_tg_pt, type);
1443 out:
1444         kfree(i_fabric);
1445         kfree(i_port);
1446         kfree(isid);
1447         kfree(t_fabric);
1448         kfree(t_port);
1449         kfree(orig);
1450         return (ret == 0) ? count : ret;
1451 }
1452
1453 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1454
1455 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
1456
1457 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1458         &target_core_dev_pr_res_holder.attr,
1459         &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1460         &target_core_dev_pr_res_pr_generation.attr,
1461         &target_core_dev_pr_res_pr_holder_tg_port.attr,
1462         &target_core_dev_pr_res_pr_registered_i_pts.attr,
1463         &target_core_dev_pr_res_pr_type.attr,
1464         &target_core_dev_pr_res_type.attr,
1465         &target_core_dev_pr_res_aptpl_active.attr,
1466         &target_core_dev_pr_res_aptpl_metadata.attr,
1467         NULL,
1468 };
1469
1470 static struct configfs_item_operations target_core_dev_pr_ops = {
1471         .show_attribute         = target_core_dev_pr_attr_show,
1472         .store_attribute        = target_core_dev_pr_attr_store,
1473 };
1474
1475 TB_CIT_SETUP(dev_pr, &target_core_dev_pr_ops, NULL, target_core_dev_pr_attrs);
1476
1477 /*  End functions for struct config_item_type tb_dev_pr_cit */
1478
1479 /*  Start functions for struct config_item_type tb_dev_cit */
1480
1481 static ssize_t target_core_show_dev_info(void *p, char *page)
1482 {
1483         struct se_device *dev = p;
1484         struct se_subsystem_api *t = dev->transport;
1485         int bl = 0;
1486         ssize_t read_bytes = 0;
1487
1488         transport_dump_dev_state(dev, page, &bl);
1489         read_bytes += bl;
1490         read_bytes += t->show_configfs_dev_params(dev, page+read_bytes);
1491         return read_bytes;
1492 }
1493
1494 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1495         .attr   = { .ca_owner = THIS_MODULE,
1496                     .ca_name = "info",
1497                     .ca_mode = S_IRUGO },
1498         .show   = target_core_show_dev_info,
1499         .store  = NULL,
1500 };
1501
1502 static ssize_t target_core_store_dev_control(
1503         void *p,
1504         const char *page,
1505         size_t count)
1506 {
1507         struct se_device *dev = p;
1508         struct se_subsystem_api *t = dev->transport;
1509
1510         return t->set_configfs_dev_params(dev, page, count);
1511 }
1512
1513 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1514         .attr   = { .ca_owner = THIS_MODULE,
1515                     .ca_name = "control",
1516                     .ca_mode = S_IWUSR },
1517         .show   = NULL,
1518         .store  = target_core_store_dev_control,
1519 };
1520
1521 static ssize_t target_core_show_dev_alias(void *p, char *page)
1522 {
1523         struct se_device *dev = p;
1524
1525         if (!(dev->dev_flags & DF_USING_ALIAS))
1526                 return 0;
1527
1528         return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1529 }
1530
1531 static ssize_t target_core_store_dev_alias(
1532         void *p,
1533         const char *page,
1534         size_t count)
1535 {
1536         struct se_device *dev = p;
1537         struct se_hba *hba = dev->se_hba;
1538         ssize_t read_bytes;
1539
1540         if (count > (SE_DEV_ALIAS_LEN-1)) {
1541                 pr_err("alias count: %d exceeds"
1542                         " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1543                         SE_DEV_ALIAS_LEN-1);
1544                 return -EINVAL;
1545         }
1546
1547         read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1548         if (!read_bytes)
1549                 return -EINVAL;
1550         if (dev->dev_alias[read_bytes - 1] == '\n')
1551                 dev->dev_alias[read_bytes - 1] = '\0';
1552
1553         dev->dev_flags |= DF_USING_ALIAS;
1554
1555         pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1556                 config_item_name(&hba->hba_group.cg_item),
1557                 config_item_name(&dev->dev_group.cg_item),
1558                 dev->dev_alias);
1559
1560         return read_bytes;
1561 }
1562
1563 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1564         .attr   = { .ca_owner = THIS_MODULE,
1565                     .ca_name = "alias",
1566                     .ca_mode =  S_IRUGO | S_IWUSR },
1567         .show   = target_core_show_dev_alias,
1568         .store  = target_core_store_dev_alias,
1569 };
1570
1571 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1572 {
1573         struct se_device *dev = p;
1574
1575         if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1576                 return 0;
1577
1578         return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1579 }
1580
1581 static ssize_t target_core_store_dev_udev_path(
1582         void *p,
1583         const char *page,
1584         size_t count)
1585 {
1586         struct se_device *dev = p;
1587         struct se_hba *hba = dev->se_hba;
1588         ssize_t read_bytes;
1589
1590         if (count > (SE_UDEV_PATH_LEN-1)) {
1591                 pr_err("udev_path count: %d exceeds"
1592                         " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1593                         SE_UDEV_PATH_LEN-1);
1594                 return -EINVAL;
1595         }
1596
1597         read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1598                         "%s", page);
1599         if (!read_bytes)
1600                 return -EINVAL;
1601         if (dev->udev_path[read_bytes - 1] == '\n')
1602                 dev->udev_path[read_bytes - 1] = '\0';
1603
1604         dev->dev_flags |= DF_USING_UDEV_PATH;
1605
1606         pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1607                 config_item_name(&hba->hba_group.cg_item),
1608                 config_item_name(&dev->dev_group.cg_item),
1609                 dev->udev_path);
1610
1611         return read_bytes;
1612 }
1613
1614 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1615         .attr   = { .ca_owner = THIS_MODULE,
1616                     .ca_name = "udev_path",
1617                     .ca_mode =  S_IRUGO | S_IWUSR },
1618         .show   = target_core_show_dev_udev_path,
1619         .store  = target_core_store_dev_udev_path,
1620 };
1621
1622 static ssize_t target_core_show_dev_enable(void *p, char *page)
1623 {
1624         struct se_device *dev = p;
1625
1626         return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1627 }
1628
1629 static ssize_t target_core_store_dev_enable(
1630         void *p,
1631         const char *page,
1632         size_t count)
1633 {
1634         struct se_device *dev = p;
1635         char *ptr;
1636         int ret;
1637
1638         ptr = strstr(page, "1");
1639         if (!ptr) {
1640                 pr_err("For dev_enable ops, only valid value"
1641                                 " is \"1\"\n");
1642                 return -EINVAL;
1643         }
1644
1645         ret = target_configure_device(dev);
1646         if (ret)
1647                 return ret;
1648         return count;
1649 }
1650
1651 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1652         .attr   = { .ca_owner = THIS_MODULE,
1653                     .ca_name = "enable",
1654                     .ca_mode =  S_IRUGO | S_IWUSR },
1655         .show   = target_core_show_dev_enable,
1656         .store  = target_core_store_dev_enable,
1657 };
1658
1659 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1660 {
1661         struct se_device *dev = p;
1662         struct config_item *lu_ci;
1663         struct t10_alua_lu_gp *lu_gp;
1664         struct t10_alua_lu_gp_member *lu_gp_mem;
1665         ssize_t len = 0;
1666
1667         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1668         if (!lu_gp_mem)
1669                 return 0;
1670
1671         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1672         lu_gp = lu_gp_mem->lu_gp;
1673         if (lu_gp) {
1674                 lu_ci = &lu_gp->lu_gp_group.cg_item;
1675                 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1676                         config_item_name(lu_ci), lu_gp->lu_gp_id);
1677         }
1678         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1679
1680         return len;
1681 }
1682
1683 static ssize_t target_core_store_alua_lu_gp(
1684         void *p,
1685         const char *page,
1686         size_t count)
1687 {
1688         struct se_device *dev = p;
1689         struct se_hba *hba = dev->se_hba;
1690         struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1691         struct t10_alua_lu_gp_member *lu_gp_mem;
1692         unsigned char buf[LU_GROUP_NAME_BUF];
1693         int move = 0;
1694
1695         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1696         if (!lu_gp_mem)
1697                 return 0;
1698
1699         if (count > LU_GROUP_NAME_BUF) {
1700                 pr_err("ALUA LU Group Alias too large!\n");
1701                 return -EINVAL;
1702         }
1703         memset(buf, 0, LU_GROUP_NAME_BUF);
1704         memcpy(buf, page, count);
1705         /*
1706          * Any ALUA logical unit alias besides "NULL" means we will be
1707          * making a new group association.
1708          */
1709         if (strcmp(strstrip(buf), "NULL")) {
1710                 /*
1711                  * core_alua_get_lu_gp_by_name() will increment reference to
1712                  * struct t10_alua_lu_gp.  This reference is released with
1713                  * core_alua_get_lu_gp_by_name below().
1714                  */
1715                 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1716                 if (!lu_gp_new)
1717                         return -ENODEV;
1718         }
1719
1720         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1721         lu_gp = lu_gp_mem->lu_gp;
1722         if (lu_gp) {
1723                 /*
1724                  * Clearing an existing lu_gp association, and replacing
1725                  * with NULL
1726                  */
1727                 if (!lu_gp_new) {
1728                         pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1729                                 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1730                                 " %hu\n",
1731                                 config_item_name(&hba->hba_group.cg_item),
1732                                 config_item_name(&dev->dev_group.cg_item),
1733                                 config_item_name(&lu_gp->lu_gp_group.cg_item),
1734                                 lu_gp->lu_gp_id);
1735
1736                         __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1737                         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1738
1739                         return count;
1740                 }
1741                 /*
1742                  * Removing existing association of lu_gp_mem with lu_gp
1743                  */
1744                 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1745                 move = 1;
1746         }
1747         /*
1748          * Associate lu_gp_mem with lu_gp_new.
1749          */
1750         __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1751         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1752
1753         pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1754                 " core/alua/lu_gps/%s, ID: %hu\n",
1755                 (move) ? "Moving" : "Adding",
1756                 config_item_name(&hba->hba_group.cg_item),
1757                 config_item_name(&dev->dev_group.cg_item),
1758                 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1759                 lu_gp_new->lu_gp_id);
1760
1761         core_alua_put_lu_gp_from_name(lu_gp_new);
1762         return count;
1763 }
1764
1765 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1766         .attr   = { .ca_owner = THIS_MODULE,
1767                     .ca_name = "alua_lu_gp",
1768                     .ca_mode = S_IRUGO | S_IWUSR },
1769         .show   = target_core_show_alua_lu_gp,
1770         .store  = target_core_store_alua_lu_gp,
1771 };
1772
1773 static ssize_t target_core_show_dev_lba_map(void *p, char *page)
1774 {
1775         struct se_device *dev = p;
1776         struct t10_alua_lba_map *map;
1777         struct t10_alua_lba_map_member *mem;
1778         char *b = page;
1779         int bl = 0;
1780         char state;
1781
1782         spin_lock(&dev->t10_alua.lba_map_lock);
1783         if (!list_empty(&dev->t10_alua.lba_map_list))
1784             bl += sprintf(b + bl, "%u %u\n",
1785                           dev->t10_alua.lba_map_segment_size,
1786                           dev->t10_alua.lba_map_segment_multiplier);
1787         list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
1788                 bl += sprintf(b + bl, "%llu %llu",
1789                               map->lba_map_first_lba, map->lba_map_last_lba);
1790                 list_for_each_entry(mem, &map->lba_map_mem_list,
1791                                     lba_map_mem_list) {
1792                         switch (mem->lba_map_mem_alua_state) {
1793                         case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
1794                                 state = 'O';
1795                                 break;
1796                         case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
1797                                 state = 'A';
1798                                 break;
1799                         case ALUA_ACCESS_STATE_STANDBY:
1800                                 state = 'S';
1801                                 break;
1802                         case ALUA_ACCESS_STATE_UNAVAILABLE:
1803                                 state = 'U';
1804                                 break;
1805                         default:
1806                                 state = '.';
1807                                 break;
1808                         }
1809                         bl += sprintf(b + bl, " %d:%c",
1810                                       mem->lba_map_mem_alua_pg_id, state);
1811                 }
1812                 bl += sprintf(b + bl, "\n");
1813         }
1814         spin_unlock(&dev->t10_alua.lba_map_lock);
1815         return bl;
1816 }
1817
1818 static ssize_t target_core_store_dev_lba_map(
1819         void *p,
1820         const char *page,
1821         size_t count)
1822 {
1823         struct se_device *dev = p;
1824         struct t10_alua_lba_map *lba_map = NULL;
1825         struct list_head lba_list;
1826         char *map_entries, *ptr;
1827         char state;
1828         int pg_num = -1, pg;
1829         int ret = 0, num = 0, pg_id, alua_state;
1830         unsigned long start_lba = -1, end_lba = -1;
1831         unsigned long segment_size = -1, segment_mult = -1;
1832
1833         map_entries = kstrdup(page, GFP_KERNEL);
1834         if (!map_entries)
1835                 return -ENOMEM;
1836
1837         INIT_LIST_HEAD(&lba_list);
1838         while ((ptr = strsep(&map_entries, "\n")) != NULL) {
1839                 if (!*ptr)
1840                         continue;
1841
1842                 if (num == 0) {
1843                         if (sscanf(ptr, "%lu %lu\n",
1844                                    &segment_size, &segment_mult) != 2) {
1845                                 pr_err("Invalid line %d\n", num);
1846                                 ret = -EINVAL;
1847                                 break;
1848                         }
1849                         num++;
1850                         continue;
1851                 }
1852                 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
1853                         pr_err("Invalid line %d\n", num);
1854                         ret = -EINVAL;
1855                         break;
1856                 }
1857                 ptr = strchr(ptr, ' ');
1858                 if (!ptr) {
1859                         pr_err("Invalid line %d, missing end lba\n", num);
1860                         ret = -EINVAL;
1861                         break;
1862                 }
1863                 ptr++;
1864                 ptr = strchr(ptr, ' ');
1865                 if (!ptr) {
1866                         pr_err("Invalid line %d, missing state definitions\n",
1867                                num);
1868                         ret = -EINVAL;
1869                         break;
1870                 }
1871                 ptr++;
1872                 lba_map = core_alua_allocate_lba_map(&lba_list,
1873                                                      start_lba, end_lba);
1874                 if (IS_ERR(lba_map)) {
1875                         ret = PTR_ERR(lba_map);
1876                         break;
1877                 }
1878                 pg = 0;
1879                 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
1880                         switch (state) {
1881                         case 'O':
1882                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
1883                                 break;
1884                         case 'A':
1885                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
1886                                 break;
1887                         case 'S':
1888                                 alua_state = ALUA_ACCESS_STATE_STANDBY;
1889                                 break;
1890                         case 'U':
1891                                 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
1892                                 break;
1893                         default:
1894                                 pr_err("Invalid ALUA state '%c'\n", state);
1895                                 ret = -EINVAL;
1896                                 goto out;
1897                         }
1898
1899                         ret = core_alua_allocate_lba_map_mem(lba_map,
1900                                                              pg_id, alua_state);
1901                         if (ret) {
1902                                 pr_err("Invalid target descriptor %d:%c "
1903                                        "at line %d\n",
1904                                        pg_id, state, num);
1905                                 break;
1906                         }
1907                         pg++;
1908                         ptr = strchr(ptr, ' ');
1909                         if (ptr)
1910                                 ptr++;
1911                         else
1912                                 break;
1913                 }
1914                 if (pg_num == -1)
1915                     pg_num = pg;
1916                 else if (pg != pg_num) {
1917                         pr_err("Only %d from %d port groups definitions "
1918                                "at line %d\n", pg, pg_num, num);
1919                         ret = -EINVAL;
1920                         break;
1921                 }
1922                 num++;
1923         }
1924 out:
1925         if (ret) {
1926                 core_alua_free_lba_map(&lba_list);
1927                 count = ret;
1928         } else
1929                 core_alua_set_lba_map(dev, &lba_list,
1930                                       segment_size, segment_mult);
1931         kfree(map_entries);
1932         return count;
1933 }
1934
1935 static struct target_core_configfs_attribute target_core_attr_dev_lba_map = {
1936         .attr   = { .ca_owner = THIS_MODULE,
1937                     .ca_name = "lba_map",
1938                     .ca_mode = S_IRUGO | S_IWUSR },
1939         .show   = target_core_show_dev_lba_map,
1940         .store  = target_core_store_dev_lba_map,
1941 };
1942
1943 static struct configfs_attribute *target_core_dev_attrs[] = {
1944         &target_core_attr_dev_info.attr,
1945         &target_core_attr_dev_control.attr,
1946         &target_core_attr_dev_alias.attr,
1947         &target_core_attr_dev_udev_path.attr,
1948         &target_core_attr_dev_enable.attr,
1949         &target_core_attr_dev_alua_lu_gp.attr,
1950         &target_core_attr_dev_lba_map.attr,
1951         NULL,
1952 };
1953
1954 static void target_core_dev_release(struct config_item *item)
1955 {
1956         struct config_group *dev_cg = to_config_group(item);
1957         struct se_device *dev =
1958                 container_of(dev_cg, struct se_device, dev_group);
1959
1960         kfree(dev_cg->default_groups);
1961         target_free_device(dev);
1962 }
1963
1964 static ssize_t target_core_dev_show(struct config_item *item,
1965                                      struct configfs_attribute *attr,
1966                                      char *page)
1967 {
1968         struct config_group *dev_cg = to_config_group(item);
1969         struct se_device *dev =
1970                 container_of(dev_cg, struct se_device, dev_group);
1971         struct target_core_configfs_attribute *tc_attr = container_of(
1972                         attr, struct target_core_configfs_attribute, attr);
1973
1974         if (!tc_attr->show)
1975                 return -EINVAL;
1976
1977         return tc_attr->show(dev, page);
1978 }
1979
1980 static ssize_t target_core_dev_store(struct config_item *item,
1981                                       struct configfs_attribute *attr,
1982                                       const char *page, size_t count)
1983 {
1984         struct config_group *dev_cg = to_config_group(item);
1985         struct se_device *dev =
1986                 container_of(dev_cg, struct se_device, dev_group);
1987         struct target_core_configfs_attribute *tc_attr = container_of(
1988                         attr, struct target_core_configfs_attribute, attr);
1989
1990         if (!tc_attr->store)
1991                 return -EINVAL;
1992
1993         return tc_attr->store(dev, page, count);
1994 }
1995
1996 static struct configfs_item_operations target_core_dev_item_ops = {
1997         .release                = target_core_dev_release,
1998         .show_attribute         = target_core_dev_show,
1999         .store_attribute        = target_core_dev_store,
2000 };
2001
2002 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2003
2004 /* End functions for struct config_item_type tb_dev_cit */
2005
2006 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2007
2008 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2009 #define SE_DEV_ALUA_LU_ATTR(_name, _mode)                               \
2010 static struct target_core_alua_lu_gp_attribute                          \
2011                         target_core_alua_lu_gp_##_name =                \
2012         __CONFIGFS_EATTR(_name, _mode,                                  \
2013         target_core_alua_lu_gp_show_attr_##_name,                       \
2014         target_core_alua_lu_gp_store_attr_##_name);
2015
2016 #define SE_DEV_ALUA_LU_ATTR_RO(_name)                                   \
2017 static struct target_core_alua_lu_gp_attribute                          \
2018                         target_core_alua_lu_gp_##_name =                \
2019         __CONFIGFS_EATTR_RO(_name,                                      \
2020         target_core_alua_lu_gp_show_attr_##_name);
2021
2022 /*
2023  * lu_gp_id
2024  */
2025 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2026         struct t10_alua_lu_gp *lu_gp,
2027         char *page)
2028 {
2029         if (!lu_gp->lu_gp_valid_id)
2030                 return 0;
2031
2032         return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2033 }
2034
2035 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2036         struct t10_alua_lu_gp *lu_gp,
2037         const char *page,
2038         size_t count)
2039 {
2040         struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2041         unsigned long lu_gp_id;
2042         int ret;
2043
2044         ret = kstrtoul(page, 0, &lu_gp_id);
2045         if (ret < 0) {
2046                 pr_err("kstrtoul() returned %d for"
2047                         " lu_gp_id\n", ret);
2048                 return ret;
2049         }
2050         if (lu_gp_id > 0x0000ffff) {
2051                 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2052                         " 0x0000ffff\n", lu_gp_id);
2053                 return -EINVAL;
2054         }
2055
2056         ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2057         if (ret < 0)
2058                 return -EINVAL;
2059
2060         pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2061                 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2062                 config_item_name(&alua_lu_gp_cg->cg_item),
2063                 lu_gp->lu_gp_id);
2064
2065         return count;
2066 }
2067
2068 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2069
2070 /*
2071  * members
2072  */
2073 static ssize_t target_core_alua_lu_gp_show_attr_members(
2074         struct t10_alua_lu_gp *lu_gp,
2075         char *page)
2076 {
2077         struct se_device *dev;
2078         struct se_hba *hba;
2079         struct t10_alua_lu_gp_member *lu_gp_mem;
2080         ssize_t len = 0, cur_len;
2081         unsigned char buf[LU_GROUP_NAME_BUF];
2082
2083         memset(buf, 0, LU_GROUP_NAME_BUF);
2084
2085         spin_lock(&lu_gp->lu_gp_lock);
2086         list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2087                 dev = lu_gp_mem->lu_gp_mem_dev;
2088                 hba = dev->se_hba;
2089
2090                 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2091                         config_item_name(&hba->hba_group.cg_item),
2092                         config_item_name(&dev->dev_group.cg_item));
2093                 cur_len++; /* Extra byte for NULL terminator */
2094
2095                 if ((cur_len + len) > PAGE_SIZE) {
2096                         pr_warn("Ran out of lu_gp_show_attr"
2097                                 "_members buffer\n");
2098                         break;
2099                 }
2100                 memcpy(page+len, buf, cur_len);
2101                 len += cur_len;
2102         }
2103         spin_unlock(&lu_gp->lu_gp_lock);
2104
2105         return len;
2106 }
2107
2108 SE_DEV_ALUA_LU_ATTR_RO(members);
2109
2110 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2111
2112 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2113         &target_core_alua_lu_gp_lu_gp_id.attr,
2114         &target_core_alua_lu_gp_members.attr,
2115         NULL,
2116 };
2117
2118 static void target_core_alua_lu_gp_release(struct config_item *item)
2119 {
2120         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2121                         struct t10_alua_lu_gp, lu_gp_group);
2122
2123         core_alua_free_lu_gp(lu_gp);
2124 }
2125
2126 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2127         .release                = target_core_alua_lu_gp_release,
2128         .show_attribute         = target_core_alua_lu_gp_attr_show,
2129         .store_attribute        = target_core_alua_lu_gp_attr_store,
2130 };
2131
2132 static struct config_item_type target_core_alua_lu_gp_cit = {
2133         .ct_item_ops            = &target_core_alua_lu_gp_ops,
2134         .ct_attrs               = target_core_alua_lu_gp_attrs,
2135         .ct_owner               = THIS_MODULE,
2136 };
2137
2138 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2139
2140 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2141
2142 static struct config_group *target_core_alua_create_lu_gp(
2143         struct config_group *group,
2144         const char *name)
2145 {
2146         struct t10_alua_lu_gp *lu_gp;
2147         struct config_group *alua_lu_gp_cg = NULL;
2148         struct config_item *alua_lu_gp_ci = NULL;
2149
2150         lu_gp = core_alua_allocate_lu_gp(name, 0);
2151         if (IS_ERR(lu_gp))
2152                 return NULL;
2153
2154         alua_lu_gp_cg = &lu_gp->lu_gp_group;
2155         alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2156
2157         config_group_init_type_name(alua_lu_gp_cg, name,
2158                         &target_core_alua_lu_gp_cit);
2159
2160         pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2161                 " Group: core/alua/lu_gps/%s\n",
2162                 config_item_name(alua_lu_gp_ci));
2163
2164         return alua_lu_gp_cg;
2165
2166 }
2167
2168 static void target_core_alua_drop_lu_gp(
2169         struct config_group *group,
2170         struct config_item *item)
2171 {
2172         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2173                         struct t10_alua_lu_gp, lu_gp_group);
2174
2175         pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2176                 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2177                 config_item_name(item), lu_gp->lu_gp_id);
2178         /*
2179          * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2180          * -> target_core_alua_lu_gp_release()
2181          */
2182         config_item_put(item);
2183 }
2184
2185 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2186         .make_group             = &target_core_alua_create_lu_gp,
2187         .drop_item              = &target_core_alua_drop_lu_gp,
2188 };
2189
2190 static struct config_item_type target_core_alua_lu_gps_cit = {
2191         .ct_item_ops            = NULL,
2192         .ct_group_ops           = &target_core_alua_lu_gps_group_ops,
2193         .ct_owner               = THIS_MODULE,
2194 };
2195
2196 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2197
2198 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2199
2200 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2201 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode)                            \
2202 static struct target_core_alua_tg_pt_gp_attribute                       \
2203                         target_core_alua_tg_pt_gp_##_name =             \
2204         __CONFIGFS_EATTR(_name, _mode,                                  \
2205         target_core_alua_tg_pt_gp_show_attr_##_name,                    \
2206         target_core_alua_tg_pt_gp_store_attr_##_name);
2207
2208 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name)                                \
2209 static struct target_core_alua_tg_pt_gp_attribute                       \
2210                         target_core_alua_tg_pt_gp_##_name =             \
2211         __CONFIGFS_EATTR_RO(_name,                                      \
2212         target_core_alua_tg_pt_gp_show_attr_##_name);
2213
2214 /*
2215  * alua_access_state
2216  */
2217 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2218         struct t10_alua_tg_pt_gp *tg_pt_gp,
2219         char *page)
2220 {
2221         return sprintf(page, "%d\n",
2222                 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2223 }
2224
2225 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2226         struct t10_alua_tg_pt_gp *tg_pt_gp,
2227         const char *page,
2228         size_t count)
2229 {
2230         struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2231         unsigned long tmp;
2232         int new_state, ret;
2233
2234         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2235                 pr_err("Unable to do implicit ALUA on non valid"
2236                         " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2237                 return -EINVAL;
2238         }
2239         if (!(dev->dev_flags & DF_CONFIGURED)) {
2240                 pr_err("Unable to set alua_access_state while device is"
2241                        " not configured\n");
2242                 return -ENODEV;
2243         }
2244
2245         ret = kstrtoul(page, 0, &tmp);
2246         if (ret < 0) {
2247                 pr_err("Unable to extract new ALUA access state from"
2248                                 " %s\n", page);
2249                 return ret;
2250         }
2251         new_state = (int)tmp;
2252
2253         if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2254                 pr_err("Unable to process implicit configfs ALUA"
2255                         " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2256                 return -EINVAL;
2257         }
2258         if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2259             new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2260                 /* LBA DEPENDENT is only allowed with implicit ALUA */
2261                 pr_err("Unable to process implicit configfs ALUA transition"
2262                        " while explicit ALUA management is enabled\n");
2263                 return -EINVAL;
2264         }
2265
2266         ret = core_alua_do_port_transition(tg_pt_gp, dev,
2267                                         NULL, NULL, new_state, 0);
2268         return (!ret) ? count : -EINVAL;
2269 }
2270
2271 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2272
2273 /*
2274  * alua_access_status
2275  */
2276 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2277         struct t10_alua_tg_pt_gp *tg_pt_gp,
2278         char *page)
2279 {
2280         return sprintf(page, "%s\n",
2281                 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2282 }
2283
2284 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2285         struct t10_alua_tg_pt_gp *tg_pt_gp,
2286         const char *page,
2287         size_t count)
2288 {
2289         unsigned long tmp;
2290         int new_status, ret;
2291
2292         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2293                 pr_err("Unable to do set ALUA access status on non"
2294                         " valid tg_pt_gp ID: %hu\n",
2295                         tg_pt_gp->tg_pt_gp_valid_id);
2296                 return -EINVAL;
2297         }
2298
2299         ret = kstrtoul(page, 0, &tmp);
2300         if (ret < 0) {
2301                 pr_err("Unable to extract new ALUA access status"
2302                                 " from %s\n", page);
2303                 return ret;
2304         }
2305         new_status = (int)tmp;
2306
2307         if ((new_status != ALUA_STATUS_NONE) &&
2308             (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2309             (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2310                 pr_err("Illegal ALUA access status: 0x%02x\n",
2311                                 new_status);
2312                 return -EINVAL;
2313         }
2314
2315         tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2316         return count;
2317 }
2318
2319 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2320
2321 /*
2322  * alua_access_type
2323  */
2324 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2325         struct t10_alua_tg_pt_gp *tg_pt_gp,
2326         char *page)
2327 {
2328         return core_alua_show_access_type(tg_pt_gp, page);
2329 }
2330
2331 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2332         struct t10_alua_tg_pt_gp *tg_pt_gp,
2333         const char *page,
2334         size_t count)
2335 {
2336         return core_alua_store_access_type(tg_pt_gp, page, count);
2337 }
2338
2339 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2340
2341 /*
2342  * alua_supported_states
2343  */
2344
2345 #define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit)               \
2346 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \
2347         struct t10_alua_tg_pt_gp *t, char *p)                           \
2348 {                                                                       \
2349         return sprintf(p, "%d\n", !!(t->_var & _bit));                  \
2350 }
2351
2352 #define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit)              \
2353 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\
2354         struct t10_alua_tg_pt_gp *t, const char *p, size_t c)           \
2355 {                                                                       \
2356         unsigned long tmp;                                              \
2357         int ret;                                                        \
2358                                                                         \
2359         if (!t->tg_pt_gp_valid_id) {                                    \
2360                 pr_err("Unable to do set ##_name ALUA state on non"     \
2361                        " valid tg_pt_gp ID: %hu\n",                     \
2362                        t->tg_pt_gp_valid_id);                           \
2363                 return -EINVAL;                                         \
2364         }                                                               \
2365                                                                         \
2366         ret = kstrtoul(p, 0, &tmp);                                     \
2367         if (ret < 0) {                                                  \
2368                 pr_err("Invalid value '%s', must be '0' or '1'\n", p);  \
2369                 return -EINVAL;                                         \
2370         }                                                               \
2371         if (tmp > 1) {                                                  \
2372                 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2373                 return -EINVAL;                                         \
2374         }                                                               \
2375         if (tmp)                                                        \
2376                 t->_var |= _bit;                                        \
2377         else                                                            \
2378                 t->_var &= ~_bit;                                       \
2379                                                                         \
2380         return c;                                                       \
2381 }
2382
2383 SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning,
2384                                tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2385 SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning,
2386                                 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2387 SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR);
2388
2389 SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline,
2390                                tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2391 SE_DEV_ALUA_SUPPORT_STATE_STORE(offline,
2392                                 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2393 SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR);
2394
2395 SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent,
2396                                tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2397 SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent,
2398                                 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2399 SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO);
2400
2401 SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable,
2402                                tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2403 SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable,
2404                                 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2405 SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR);
2406
2407 SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby,
2408                                tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2409 SE_DEV_ALUA_SUPPORT_STATE_STORE(standby,
2410                                 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2411 SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR);
2412
2413 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized,
2414                                tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2415 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized,
2416                                 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2417 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR);
2418
2419 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized,
2420                                tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2421 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized,
2422                                 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2423 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR);
2424
2425 /*
2426  * alua_write_metadata
2427  */
2428 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2429         struct t10_alua_tg_pt_gp *tg_pt_gp,
2430         char *page)
2431 {
2432         return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2433 }
2434
2435 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2436         struct t10_alua_tg_pt_gp *tg_pt_gp,
2437         const char *page,
2438         size_t count)
2439 {
2440         unsigned long tmp;
2441         int ret;
2442
2443         ret = kstrtoul(page, 0, &tmp);
2444         if (ret < 0) {
2445                 pr_err("Unable to extract alua_write_metadata\n");
2446                 return ret;
2447         }
2448
2449         if ((tmp != 0) && (tmp != 1)) {
2450                 pr_err("Illegal value for alua_write_metadata:"
2451                         " %lu\n", tmp);
2452                 return -EINVAL;
2453         }
2454         tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2455
2456         return count;
2457 }
2458
2459 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2460
2461
2462
2463 /*
2464  * nonop_delay_msecs
2465  */
2466 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2467         struct t10_alua_tg_pt_gp *tg_pt_gp,
2468         char *page)
2469 {
2470         return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2471
2472 }
2473
2474 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2475         struct t10_alua_tg_pt_gp *tg_pt_gp,
2476         const char *page,
2477         size_t count)
2478 {
2479         return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2480 }
2481
2482 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2483
2484 /*
2485  * trans_delay_msecs
2486  */
2487 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2488         struct t10_alua_tg_pt_gp *tg_pt_gp,
2489         char *page)
2490 {
2491         return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2492 }
2493
2494 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2495         struct t10_alua_tg_pt_gp *tg_pt_gp,
2496         const char *page,
2497         size_t count)
2498 {
2499         return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2500 }
2501
2502 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2503
2504 /*
2505  * implicit_trans_secs
2506  */
2507 static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs(
2508         struct t10_alua_tg_pt_gp *tg_pt_gp,
2509         char *page)
2510 {
2511         return core_alua_show_implicit_trans_secs(tg_pt_gp, page);
2512 }
2513
2514 static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs(
2515         struct t10_alua_tg_pt_gp *tg_pt_gp,
2516         const char *page,
2517         size_t count)
2518 {
2519         return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count);
2520 }
2521
2522 SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR);
2523
2524 /*
2525  * preferred
2526  */
2527
2528 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2529         struct t10_alua_tg_pt_gp *tg_pt_gp,
2530         char *page)
2531 {
2532         return core_alua_show_preferred_bit(tg_pt_gp, page);
2533 }
2534
2535 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2536         struct t10_alua_tg_pt_gp *tg_pt_gp,
2537         const char *page,
2538         size_t count)
2539 {
2540         return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2541 }
2542
2543 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2544
2545 /*
2546  * tg_pt_gp_id
2547  */
2548 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2549         struct t10_alua_tg_pt_gp *tg_pt_gp,
2550         char *page)
2551 {
2552         if (!tg_pt_gp->tg_pt_gp_valid_id)
2553                 return 0;
2554
2555         return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2556 }
2557
2558 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2559         struct t10_alua_tg_pt_gp *tg_pt_gp,
2560         const char *page,
2561         size_t count)
2562 {
2563         struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2564         unsigned long tg_pt_gp_id;
2565         int ret;
2566
2567         ret = kstrtoul(page, 0, &tg_pt_gp_id);
2568         if (ret < 0) {
2569                 pr_err("kstrtoul() returned %d for"
2570                         " tg_pt_gp_id\n", ret);
2571                 return ret;
2572         }
2573         if (tg_pt_gp_id > 0x0000ffff) {
2574                 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2575                         " 0x0000ffff\n", tg_pt_gp_id);
2576                 return -EINVAL;
2577         }
2578
2579         ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2580         if (ret < 0)
2581                 return -EINVAL;
2582
2583         pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2584                 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2585                 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2586                 tg_pt_gp->tg_pt_gp_id);
2587
2588         return count;
2589 }
2590
2591 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2592
2593 /*
2594  * members
2595  */
2596 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2597         struct t10_alua_tg_pt_gp *tg_pt_gp,
2598         char *page)
2599 {
2600         struct se_port *port;
2601         struct se_portal_group *tpg;
2602         struct se_lun *lun;
2603         struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2604         ssize_t len = 0, cur_len;
2605         unsigned char buf[TG_PT_GROUP_NAME_BUF];
2606
2607         memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2608
2609         spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2610         list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2611                         tg_pt_gp_mem_list) {
2612                 port = tg_pt_gp_mem->tg_pt;
2613                 tpg = port->sep_tpg;
2614                 lun = port->sep_lun;
2615
2616                 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2617                         "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2618                         tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2619                         tpg->se_tpg_tfo->tpg_get_tag(tpg),
2620                         config_item_name(&lun->lun_group.cg_item));
2621                 cur_len++; /* Extra byte for NULL terminator */
2622
2623                 if ((cur_len + len) > PAGE_SIZE) {
2624                         pr_warn("Ran out of lu_gp_show_attr"
2625                                 "_members buffer\n");
2626                         break;
2627                 }
2628                 memcpy(page+len, buf, cur_len);
2629                 len += cur_len;
2630         }
2631         spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2632
2633         return len;
2634 }
2635
2636 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2637
2638 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2639                         tg_pt_gp_group);
2640
2641 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2642         &target_core_alua_tg_pt_gp_alua_access_state.attr,
2643         &target_core_alua_tg_pt_gp_alua_access_status.attr,
2644         &target_core_alua_tg_pt_gp_alua_access_type.attr,
2645         &target_core_alua_tg_pt_gp_alua_support_transitioning.attr,
2646         &target_core_alua_tg_pt_gp_alua_support_offline.attr,
2647         &target_core_alua_tg_pt_gp_alua_support_lba_dependent.attr,
2648         &target_core_alua_tg_pt_gp_alua_support_unavailable.attr,
2649         &target_core_alua_tg_pt_gp_alua_support_standby.attr,
2650         &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized.attr,
2651         &target_core_alua_tg_pt_gp_alua_support_active_optimized.attr,
2652         &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2653         &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2654         &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2655         &target_core_alua_tg_pt_gp_implicit_trans_secs.attr,
2656         &target_core_alua_tg_pt_gp_preferred.attr,
2657         &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2658         &target_core_alua_tg_pt_gp_members.attr,
2659         NULL,
2660 };
2661
2662 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2663 {
2664         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2665                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2666
2667         core_alua_free_tg_pt_gp(tg_pt_gp);
2668 }
2669
2670 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2671         .release                = target_core_alua_tg_pt_gp_release,
2672         .show_attribute         = target_core_alua_tg_pt_gp_attr_show,
2673         .store_attribute        = target_core_alua_tg_pt_gp_attr_store,
2674 };
2675
2676 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2677         .ct_item_ops            = &target_core_alua_tg_pt_gp_ops,
2678         .ct_attrs               = target_core_alua_tg_pt_gp_attrs,
2679         .ct_owner               = THIS_MODULE,
2680 };
2681
2682 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2683
2684 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2685
2686 static struct config_group *target_core_alua_create_tg_pt_gp(
2687         struct config_group *group,
2688         const char *name)
2689 {
2690         struct t10_alua *alua = container_of(group, struct t10_alua,
2691                                         alua_tg_pt_gps_group);
2692         struct t10_alua_tg_pt_gp *tg_pt_gp;
2693         struct config_group *alua_tg_pt_gp_cg = NULL;
2694         struct config_item *alua_tg_pt_gp_ci = NULL;
2695
2696         tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2697         if (!tg_pt_gp)
2698                 return NULL;
2699
2700         alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2701         alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2702
2703         config_group_init_type_name(alua_tg_pt_gp_cg, name,
2704                         &target_core_alua_tg_pt_gp_cit);
2705
2706         pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2707                 " Group: alua/tg_pt_gps/%s\n",
2708                 config_item_name(alua_tg_pt_gp_ci));
2709
2710         return alua_tg_pt_gp_cg;
2711 }
2712
2713 static void target_core_alua_drop_tg_pt_gp(
2714         struct config_group *group,
2715         struct config_item *item)
2716 {
2717         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2718                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2719
2720         pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2721                 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2722                 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2723         /*
2724          * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2725          * -> target_core_alua_tg_pt_gp_release().
2726          */
2727         config_item_put(item);
2728 }
2729
2730 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2731         .make_group             = &target_core_alua_create_tg_pt_gp,
2732         .drop_item              = &target_core_alua_drop_tg_pt_gp,
2733 };
2734
2735 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2736         .ct_group_ops           = &target_core_alua_tg_pt_gps_group_ops,
2737         .ct_owner               = THIS_MODULE,
2738 };
2739
2740 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2741
2742 /* Start functions for struct config_item_type target_core_alua_cit */
2743
2744 /*
2745  * target_core_alua_cit is a ConfigFS group that lives under
2746  * /sys/kernel/config/target/core/alua.  There are default groups
2747  * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2748  * target_core_alua_cit in target_core_init_configfs() below.
2749  */
2750 static struct config_item_type target_core_alua_cit = {
2751         .ct_item_ops            = NULL,
2752         .ct_attrs               = NULL,
2753         .ct_owner               = THIS_MODULE,
2754 };
2755
2756 /* End functions for struct config_item_type target_core_alua_cit */
2757
2758 /* Start functions for struct config_item_type target_core_stat_cit */
2759
2760 static struct config_group *target_core_stat_mkdir(
2761         struct config_group *group,
2762         const char *name)
2763 {
2764         return ERR_PTR(-ENOSYS);
2765 }
2766
2767 static void target_core_stat_rmdir(
2768         struct config_group *group,
2769         struct config_item *item)
2770 {
2771         return;
2772 }
2773
2774 static struct configfs_group_operations target_core_stat_group_ops = {
2775         .make_group             = &target_core_stat_mkdir,
2776         .drop_item              = &target_core_stat_rmdir,
2777 };
2778
2779 static struct config_item_type target_core_stat_cit = {
2780         .ct_group_ops           = &target_core_stat_group_ops,
2781         .ct_owner               = THIS_MODULE,
2782 };
2783
2784 /* End functions for struct config_item_type target_core_stat_cit */
2785
2786 /* Start functions for struct config_item_type target_core_hba_cit */
2787
2788 static struct config_group *target_core_make_subdev(
2789         struct config_group *group,
2790         const char *name)
2791 {
2792         struct t10_alua_tg_pt_gp *tg_pt_gp;
2793         struct se_subsystem_api *t;
2794         struct config_item *hba_ci = &group->cg_item;
2795         struct se_hba *hba = item_to_hba(hba_ci);
2796         struct se_device *dev;
2797         struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2798         struct config_group *dev_stat_grp = NULL;
2799         int errno = -ENOMEM, ret;
2800
2801         ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2802         if (ret)
2803                 return ERR_PTR(ret);
2804         /*
2805          * Locate the struct se_subsystem_api from parent's struct se_hba.
2806          */
2807         t = hba->transport;
2808
2809         dev = target_alloc_device(hba, name);
2810         if (!dev)
2811                 goto out_unlock;
2812
2813         dev_cg = &dev->dev_group;
2814
2815         dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
2816                         GFP_KERNEL);
2817         if (!dev_cg->default_groups)
2818                 goto out_free_device;
2819
2820         config_group_init_type_name(dev_cg, name, &t->tb_cits.tb_dev_cit);
2821         config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2822                         &t->tb_cits.tb_dev_attrib_cit);
2823         config_group_init_type_name(&dev->dev_pr_group, "pr",
2824                         &t->tb_cits.tb_dev_pr_cit);
2825         config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2826                         &target_core_dev_wwn_cit);
2827         config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2828                         "alua", &target_core_alua_tg_pt_gps_cit);
2829         config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2830                         "statistics", &target_core_stat_cit);
2831
2832         dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
2833         dev_cg->default_groups[1] = &dev->dev_pr_group;
2834         dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
2835         dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
2836         dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
2837         dev_cg->default_groups[5] = NULL;
2838         /*
2839          * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2840          */
2841         tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2842         if (!tg_pt_gp)
2843                 goto out_free_dev_cg_default_groups;
2844         dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2845
2846         tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2847         tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2848                                 GFP_KERNEL);
2849         if (!tg_pt_gp_cg->default_groups) {
2850                 pr_err("Unable to allocate tg_pt_gp_cg->"
2851                                 "default_groups\n");
2852                 goto out_free_tg_pt_gp;
2853         }
2854
2855         config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2856                         "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2857         tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2858         tg_pt_gp_cg->default_groups[1] = NULL;
2859         /*
2860          * Add core/$HBA/$DEV/statistics/ default groups
2861          */
2862         dev_stat_grp = &dev->dev_stat_grps.stat_group;
2863         dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
2864                                 GFP_KERNEL);
2865         if (!dev_stat_grp->default_groups) {
2866                 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2867                 goto out_free_tg_pt_gp_cg_default_groups;
2868         }
2869         target_stat_setup_dev_default_groups(dev);
2870
2871         mutex_unlock(&hba->hba_access_mutex);
2872         return dev_cg;
2873
2874 out_free_tg_pt_gp_cg_default_groups:
2875         kfree(tg_pt_gp_cg->default_groups);
2876 out_free_tg_pt_gp:
2877         core_alua_free_tg_pt_gp(tg_pt_gp);
2878 out_free_dev_cg_default_groups:
2879         kfree(dev_cg->default_groups);
2880 out_free_device:
2881         target_free_device(dev);
2882 out_unlock:
2883         mutex_unlock(&hba->hba_access_mutex);
2884         return ERR_PTR(errno);
2885 }
2886
2887 static void target_core_drop_subdev(
2888         struct config_group *group,
2889         struct config_item *item)
2890 {
2891         struct config_group *dev_cg = to_config_group(item);
2892         struct se_device *dev =
2893                 container_of(dev_cg, struct se_device, dev_group);
2894         struct se_hba *hba;
2895         struct config_item *df_item;
2896         struct config_group *tg_pt_gp_cg, *dev_stat_grp;
2897         int i;
2898
2899         hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
2900
2901         mutex_lock(&hba->hba_access_mutex);
2902
2903         dev_stat_grp = &dev->dev_stat_grps.stat_group;
2904         for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2905                 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2906                 dev_stat_grp->default_groups[i] = NULL;
2907                 config_item_put(df_item);
2908         }
2909         kfree(dev_stat_grp->default_groups);
2910
2911         tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2912         for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2913                 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2914                 tg_pt_gp_cg->default_groups[i] = NULL;
2915                 config_item_put(df_item);
2916         }
2917         kfree(tg_pt_gp_cg->default_groups);
2918         /*
2919          * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2920          * directly from target_core_alua_tg_pt_gp_release().
2921          */
2922         dev->t10_alua.default_tg_pt_gp = NULL;
2923
2924         for (i = 0; dev_cg->default_groups[i]; i++) {
2925                 df_item = &dev_cg->default_groups[i]->cg_item;
2926                 dev_cg->default_groups[i] = NULL;
2927                 config_item_put(df_item);
2928         }
2929         /*
2930          * se_dev is released from target_core_dev_item_ops->release()
2931          */
2932         config_item_put(item);
2933         mutex_unlock(&hba->hba_access_mutex);
2934 }
2935
2936 static struct configfs_group_operations target_core_hba_group_ops = {
2937         .make_group             = target_core_make_subdev,
2938         .drop_item              = target_core_drop_subdev,
2939 };
2940
2941 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2942 #define SE_HBA_ATTR(_name, _mode)                               \
2943 static struct target_core_hba_attribute                         \
2944                 target_core_hba_##_name =                       \
2945                 __CONFIGFS_EATTR(_name, _mode,                  \
2946                 target_core_hba_show_attr_##_name,              \
2947                 target_core_hba_store_attr_##_name);
2948
2949 #define SE_HBA_ATTR_RO(_name)                                   \
2950 static struct target_core_hba_attribute                         \
2951                 target_core_hba_##_name =                       \
2952                 __CONFIGFS_EATTR_RO(_name,                      \
2953                 target_core_hba_show_attr_##_name);
2954
2955 static ssize_t target_core_hba_show_attr_hba_info(
2956         struct se_hba *hba,
2957         char *page)
2958 {
2959         return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2960                         hba->hba_id, hba->transport->name,
2961                         TARGET_CORE_CONFIGFS_VERSION);
2962 }
2963
2964 SE_HBA_ATTR_RO(hba_info);
2965
2966 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2967                                 char *page)
2968 {
2969         int hba_mode = 0;
2970
2971         if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2972                 hba_mode = 1;
2973
2974         return sprintf(page, "%d\n", hba_mode);
2975 }
2976
2977 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2978                                 const char *page, size_t count)
2979 {
2980         struct se_subsystem_api *transport = hba->transport;
2981         unsigned long mode_flag;
2982         int ret;
2983
2984         if (transport->pmode_enable_hba == NULL)
2985                 return -EINVAL;
2986
2987         ret = kstrtoul(page, 0, &mode_flag);
2988         if (ret < 0) {
2989                 pr_err("Unable to extract hba mode flag: %d\n", ret);
2990                 return ret;
2991         }
2992
2993         if (hba->dev_count) {
2994                 pr_err("Unable to set hba_mode with active devices\n");
2995                 return -EINVAL;
2996         }
2997
2998         ret = transport->pmode_enable_hba(hba, mode_flag);
2999         if (ret < 0)
3000                 return -EINVAL;
3001         if (ret > 0)
3002                 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3003         else if (ret == 0)
3004                 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3005
3006         return count;
3007 }
3008
3009 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
3010
3011 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
3012
3013 static void target_core_hba_release(struct config_item *item)
3014 {
3015         struct se_hba *hba = container_of(to_config_group(item),
3016                                 struct se_hba, hba_group);
3017         core_delete_hba(hba);
3018 }
3019
3020 static struct configfs_attribute *target_core_hba_attrs[] = {
3021         &target_core_hba_hba_info.attr,
3022         &target_core_hba_hba_mode.attr,
3023         NULL,
3024 };
3025
3026 static struct configfs_item_operations target_core_hba_item_ops = {
3027         .release                = target_core_hba_release,
3028         .show_attribute         = target_core_hba_attr_show,
3029         .store_attribute        = target_core_hba_attr_store,
3030 };
3031
3032 static struct config_item_type target_core_hba_cit = {
3033         .ct_item_ops            = &target_core_hba_item_ops,
3034         .ct_group_ops           = &target_core_hba_group_ops,
3035         .ct_attrs               = target_core_hba_attrs,
3036         .ct_owner               = THIS_MODULE,
3037 };
3038
3039 static struct config_group *target_core_call_addhbatotarget(
3040         struct config_group *group,
3041         const char *name)
3042 {
3043         char *se_plugin_str, *str, *str2;
3044         struct se_hba *hba;
3045         char buf[TARGET_CORE_NAME_MAX_LEN];
3046         unsigned long plugin_dep_id = 0;
3047         int ret;
3048
3049         memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3050         if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3051                 pr_err("Passed *name strlen(): %d exceeds"
3052                         " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3053                         TARGET_CORE_NAME_MAX_LEN);
3054                 return ERR_PTR(-ENAMETOOLONG);
3055         }
3056         snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3057
3058         str = strstr(buf, "_");
3059         if (!str) {
3060                 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3061                 return ERR_PTR(-EINVAL);
3062         }
3063         se_plugin_str = buf;
3064         /*
3065          * Special case for subsystem plugins that have "_" in their names.
3066          * Namely rd_direct and rd_mcp..
3067          */
3068         str2 = strstr(str+1, "_");
3069         if (str2) {
3070                 *str2 = '\0'; /* Terminate for *se_plugin_str */
3071                 str2++; /* Skip to start of plugin dependent ID */
3072                 str = str2;
3073         } else {
3074                 *str = '\0'; /* Terminate for *se_plugin_str */
3075                 str++; /* Skip to start of plugin dependent ID */
3076         }
3077
3078         ret = kstrtoul(str, 0, &plugin_dep_id);
3079         if (ret < 0) {
3080                 pr_err("kstrtoul() returned %d for"
3081                                 " plugin_dep_id\n", ret);
3082                 return ERR_PTR(ret);
3083         }
3084         /*
3085          * Load up TCM subsystem plugins if they have not already been loaded.
3086          */
3087         transport_subsystem_check_init();
3088
3089         hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3090         if (IS_ERR(hba))
3091                 return ERR_CAST(hba);
3092
3093         config_group_init_type_name(&hba->hba_group, name,
3094                         &target_core_hba_cit);
3095
3096         return &hba->hba_group;
3097 }
3098
3099 static void target_core_call_delhbafromtarget(
3100         struct config_group *group,
3101         struct config_item *item)
3102 {
3103         /*
3104          * core_delete_hba() is called from target_core_hba_item_ops->release()
3105          * -> target_core_hba_release()
3106          */
3107         config_item_put(item);
3108 }
3109
3110 static struct configfs_group_operations target_core_group_ops = {
3111         .make_group     = target_core_call_addhbatotarget,
3112         .drop_item      = target_core_call_delhbafromtarget,
3113 };
3114
3115 static struct config_item_type target_core_cit = {
3116         .ct_item_ops    = NULL,
3117         .ct_group_ops   = &target_core_group_ops,
3118         .ct_attrs       = NULL,
3119         .ct_owner       = THIS_MODULE,
3120 };
3121
3122 /* Stop functions for struct config_item_type target_core_hba_cit */
3123
3124 void target_core_setup_sub_cits(struct se_subsystem_api *sa)
3125 {
3126         target_core_setup_dev_cit(sa);
3127         target_core_setup_dev_attrib_cit(sa);
3128         target_core_setup_dev_pr_cit(sa);
3129 }
3130 EXPORT_SYMBOL(target_core_setup_sub_cits);
3131
3132 static int __init target_core_init_configfs(void)
3133 {
3134         struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3135         struct config_group *lu_gp_cg = NULL;
3136         struct configfs_subsystem *subsys;
3137         struct t10_alua_lu_gp *lu_gp;
3138         int ret;
3139
3140         pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3141                 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3142                 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3143
3144         subsys = target_core_subsystem[0];
3145         config_group_init(&subsys->su_group);
3146         mutex_init(&subsys->su_mutex);
3147
3148         ret = init_se_kmem_caches();
3149         if (ret < 0)
3150                 return ret;
3151         /*
3152          * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3153          * and ALUA Logical Unit Group and Target Port Group infrastructure.
3154          */
3155         target_cg = &subsys->su_group;
3156         target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3157                                 GFP_KERNEL);
3158         if (!target_cg->default_groups) {
3159                 pr_err("Unable to allocate target_cg->default_groups\n");
3160                 ret = -ENOMEM;
3161                 goto out_global;
3162         }
3163
3164         config_group_init_type_name(&target_core_hbagroup,
3165                         "core", &target_core_cit);
3166         target_cg->default_groups[0] = &target_core_hbagroup;
3167         target_cg->default_groups[1] = NULL;
3168         /*
3169          * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3170          */
3171         hba_cg = &target_core_hbagroup;
3172         hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3173                                 GFP_KERNEL);
3174         if (!hba_cg->default_groups) {
3175                 pr_err("Unable to allocate hba_cg->default_groups\n");
3176                 ret = -ENOMEM;
3177                 goto out_global;
3178         }
3179         config_group_init_type_name(&alua_group,
3180                         "alua", &target_core_alua_cit);
3181         hba_cg->default_groups[0] = &alua_group;
3182         hba_cg->default_groups[1] = NULL;
3183         /*
3184          * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3185          * groups under /sys/kernel/config/target/core/alua/
3186          */
3187         alua_cg = &alua_group;
3188         alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3189                         GFP_KERNEL);
3190         if (!alua_cg->default_groups) {
3191                 pr_err("Unable to allocate alua_cg->default_groups\n");
3192                 ret = -ENOMEM;
3193                 goto out_global;
3194         }
3195
3196         config_group_init_type_name(&alua_lu_gps_group,
3197                         "lu_gps", &target_core_alua_lu_gps_cit);
3198         alua_cg->default_groups[0] = &alua_lu_gps_group;
3199         alua_cg->default_groups[1] = NULL;
3200         /*
3201          * Add core/alua/lu_gps/default_lu_gp
3202          */
3203         lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3204         if (IS_ERR(lu_gp)) {
3205                 ret = -ENOMEM;
3206                 goto out_global;
3207         }
3208
3209         lu_gp_cg = &alua_lu_gps_group;
3210         lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3211                         GFP_KERNEL);
3212         if (!lu_gp_cg->default_groups) {
3213                 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3214                 ret = -ENOMEM;
3215                 goto out_global;
3216         }
3217
3218         config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3219                                 &target_core_alua_lu_gp_cit);
3220         lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3221         lu_gp_cg->default_groups[1] = NULL;
3222         default_lu_gp = lu_gp;
3223         /*
3224          * Register the target_core_mod subsystem with configfs.
3225          */
3226         ret = configfs_register_subsystem(subsys);
3227         if (ret < 0) {
3228                 pr_err("Error %d while registering subsystem %s\n",
3229                         ret, subsys->su_group.cg_item.ci_namebuf);
3230                 goto out_global;
3231         }
3232         pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3233                 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3234                 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3235         /*
3236          * Register built-in RAMDISK subsystem logic for virtual LUN 0
3237          */
3238         ret = rd_module_init();
3239         if (ret < 0)
3240                 goto out;
3241
3242         ret = core_dev_setup_virtual_lun0();
3243         if (ret < 0)
3244                 goto out;
3245
3246         ret = target_xcopy_setup_pt();
3247         if (ret < 0)
3248                 goto out;
3249
3250         return 0;
3251
3252 out:
3253         configfs_unregister_subsystem(subsys);
3254         core_dev_release_virtual_lun0();
3255         rd_module_exit();
3256 out_global:
3257         if (default_lu_gp) {
3258                 core_alua_free_lu_gp(default_lu_gp);
3259                 default_lu_gp = NULL;
3260         }
3261         if (lu_gp_cg)
3262                 kfree(lu_gp_cg->default_groups);
3263         if (alua_cg)
3264                 kfree(alua_cg->default_groups);
3265         if (hba_cg)
3266                 kfree(hba_cg->default_groups);
3267         kfree(target_cg->default_groups);
3268         release_se_kmem_caches();
3269         return ret;
3270 }
3271
3272 static void __exit target_core_exit_configfs(void)
3273 {
3274         struct configfs_subsystem *subsys;
3275         struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3276         struct config_item *item;
3277         int i;
3278
3279         subsys = target_core_subsystem[0];
3280
3281         lu_gp_cg = &alua_lu_gps_group;
3282         for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3283                 item = &lu_gp_cg->default_groups[i]->cg_item;
3284                 lu_gp_cg->default_groups[i] = NULL;
3285                 config_item_put(item);
3286         }
3287         kfree(lu_gp_cg->default_groups);
3288         lu_gp_cg->default_groups = NULL;
3289
3290         alua_cg = &alua_group;
3291         for (i = 0; alua_cg->default_groups[i]; i++) {
3292                 item = &alua_cg->default_groups[i]->cg_item;
3293                 alua_cg->default_groups[i] = NULL;
3294                 config_item_put(item);
3295         }
3296         kfree(alua_cg->default_groups);
3297         alua_cg->default_groups = NULL;
3298
3299         hba_cg = &target_core_hbagroup;
3300         for (i = 0; hba_cg->default_groups[i]; i++) {
3301                 item = &hba_cg->default_groups[i]->cg_item;
3302                 hba_cg->default_groups[i] = NULL;
3303                 config_item_put(item);
3304         }
3305         kfree(hba_cg->default_groups);
3306         hba_cg->default_groups = NULL;
3307         /*
3308          * We expect subsys->su_group.default_groups to be released
3309          * by configfs subsystem provider logic..
3310          */
3311         configfs_unregister_subsystem(subsys);
3312         kfree(subsys->su_group.default_groups);
3313
3314         core_alua_free_lu_gp(default_lu_gp);
3315         default_lu_gp = NULL;
3316
3317         pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3318                         " Infrastructure\n");
3319
3320         core_dev_release_virtual_lun0();
3321         rd_module_exit();
3322         target_xcopy_release_pt();
3323         release_se_kmem_caches();
3324 }
3325
3326 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3327 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3328 MODULE_LICENSE("GPL");
3329
3330 module_init(target_core_init_configfs);
3331 module_exit(target_core_exit_configfs);