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  * Copyright (c) 2008-2011 Rising Tide Systems
   7  * Copyright (c) 2008-2011 Linux-iSCSI.org
   8  *
   9  * Nicholas A. Bellinger <nab@kernel.org>
  10  *
  11  * based on configfs Copyright (C) 2005 Oracle.  All rights reserved.
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  ****************************************************************************/
  23
  24 #include <linux/module.h>
  25 #include <linux/moduleparam.h>
  26 #include <generated/utsrelease.h>
  27 #include <linux/utsname.h>
  28 #include <linux/init.h>
  29 #include <linux/fs.h>
  30 #include <linux/namei.h>
  31 #include <linux/slab.h>
  32 #include <linux/types.h>
  33 #include <linux/delay.h>
  34 #include <linux/unistd.h>
  35 #include <linux/string.h>
  36 #include <linux/parser.h>
  37 #include <linux/syscalls.h>
  38 #include <linux/configfs.h>
  39 #include <linux/spinlock.h>
  40
  41 #include <target/target_core_base.h>
  42 #include <target/target_core_backend.h>
  43 #include <target/target_core_fabric.h>
  44 #include <target/target_core_fabric_configfs.h>
  45 #include <target/target_core_configfs.h>
  46 #include <target/configfs_macros.h>
  47
  48 #include "target_core_internal.h"
  49 #include "target_core_alua.h"
  50 #include "target_core_pr.h"
  51 #include "target_core_rd.h"
  52
  53 extern struct t10_alua_lu_gp *default_lu_gp;
  54
  55 static LIST_HEAD(g_tf_list);
  56 static DEFINE_MUTEX(g_tf_lock);
  57
  58 struct target_core_configfs_attribute {
  59         struct configfs_attribute attr;
  60         ssize_t (*show)(void *, char *);
  61         ssize_t (*store)(void *, const char *, size_t);
  62 };
  63
  64 static struct config_group target_core_hbagroup;
  65 static struct config_group alua_group;
  66 static struct config_group alua_lu_gps_group;
  67
  68 static inline struct se_hba *
  69 item_to_hba(struct config_item *item)
  70 {
  71         return container_of(to_config_group(item), struct se_hba, hba_group);
  72 }
  73
  74 /*
  75  * Attributes for /sys/kernel/config/target/
  76  */
  77 static ssize_t target_core_attr_show(struct config_item *item,
  78                                       struct configfs_attribute *attr,
  79                                       char *page)
  80 {
  81         return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
  82                 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
  83                 utsname()->sysname, utsname()->machine);
  84 }
  85
  86 static struct configfs_item_operations target_core_fabric_item_ops = {
  87         .show_attribute = target_core_attr_show,
  88 };
  89
  90 static struct configfs_attribute target_core_item_attr_version = {
  91         .ca_owner       = THIS_MODULE,
  92         .ca_name        = "version",
  93         .ca_mode        = S_IRUGO,
  94 };
  95
  96 static struct target_fabric_configfs *target_core_get_fabric(
  97         const char *name)
  98 {
  99         struct target_fabric_configfs *tf;
 100
 101         if (!name)
 102                 return NULL;
 103
 104         mutex_lock(&g_tf_lock);
 105         list_for_each_entry(tf, &g_tf_list, tf_list) {
 106                 if (!strcmp(tf->tf_name, name)) {
 107                         atomic_inc(&tf->tf_access_cnt);
 108                         mutex_unlock(&g_tf_lock);
 109                         return tf;
 110                 }
 111         }
 112         mutex_unlock(&g_tf_lock);
 113
 114         return NULL;
 115 }
 116
 117 /*
 118  * Called from struct target_core_group_ops->make_group()
 119  */
 120 static struct config_group *target_core_register_fabric(
 121         struct config_group *group,
 122         const char *name)
 123 {
 124         struct target_fabric_configfs *tf;
 125         int ret;
 126
 127         pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
 128                         " %s\n", group, name);
 129         /*
 130          * Below are some hardcoded request_module() calls to automatically
 131          * local fabric modules when the following is called:
 132          *
 133          * mkdir -p /sys/kernel/config/target/$MODULE_NAME
 134          *
 135          * Note that this does not limit which TCM fabric module can be
 136          * registered, but simply provids auto loading logic for modules with
 137          * mkdir(2) system calls with known TCM fabric modules.
 138          */
 139         if (!strncmp(name, "iscsi", 5)) {
 140                 /*
 141                  * Automatically load the LIO Target fabric module when the
 142                  * following is called:
 143                  *
 144                  * mkdir -p $CONFIGFS/target/iscsi
 145                  */
 146                 ret = request_module("iscsi_target_mod");
 147                 if (ret < 0) {
 148                         pr_err("request_module() failed for"
 149                                 " iscsi_target_mod.ko: %d\n", ret);
 150                         return ERR_PTR(-EINVAL);
 151                 }
 152         } else if (!strncmp(name, "loopback", 8)) {
 153                 /*
 154                  * Automatically load the tcm_loop fabric module when the
 155                  * following is called:
 156                  *
 157                  * mkdir -p $CONFIGFS/target/loopback
 158                  */
 159                 ret = request_module("tcm_loop");
 160                 if (ret < 0) {
 161                         pr_err("request_module() failed for"
 162                                 " tcm_loop.ko: %d\n", ret);
 163                         return ERR_PTR(-EINVAL);
 164                 }
 165         }
 166
 167         tf = target_core_get_fabric(name);
 168         if (!tf) {
 169                 pr_err("target_core_get_fabric() failed for %s\n",
 170                         name);
 171                 return ERR_PTR(-EINVAL);
 172         }
 173         pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
 174                         " %s\n", tf->tf_name);
 175         /*
 176          * On a successful target_core_get_fabric() look, the returned
 177          * struct target_fabric_configfs *tf will contain a usage reference.
 178          */
 179         pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
 180                         &TF_CIT_TMPL(tf)->tfc_wwn_cit);
 181
 182         tf->tf_group.default_groups = tf->tf_default_groups;
 183         tf->tf_group.default_groups[0] = &tf->tf_disc_group;
 184         tf->tf_group.default_groups[1] = NULL;
 185
 186         config_group_init_type_name(&tf->tf_group, name,
 187                         &TF_CIT_TMPL(tf)->tfc_wwn_cit);
 188         config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
 189                         &TF_CIT_TMPL(tf)->tfc_discovery_cit);
 190
 191         pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
 192                         " %s\n", tf->tf_group.cg_item.ci_name);
 193         /*
 194          * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
 195          */
 196         tf->tf_ops.tf_subsys = tf->tf_subsys;
 197         tf->tf_fabric = &tf->tf_group.cg_item;
 198         pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
 199                         " for %s\n", name);
 200
 201         return &tf->tf_group;
 202 }
 203
 204 /*
 205  * Called from struct target_core_group_ops->drop_item()
 206  */
 207 static void target_core_deregister_fabric(
 208         struct config_group *group,
 209         struct config_item *item)
 210 {
 211         struct target_fabric_configfs *tf = container_of(
 212                 to_config_group(item), struct target_fabric_configfs, tf_group);
 213         struct config_group *tf_group;
 214         struct config_item *df_item;
 215         int i;
 216
 217         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
 218                 " tf list\n", config_item_name(item));
 219
 220         pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
 221                         " %s\n", tf->tf_name);
 222         atomic_dec(&tf->tf_access_cnt);
 223
 224         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
 225                         " tf->tf_fabric for %s\n", tf->tf_name);
 226         tf->tf_fabric = NULL;
 227
 228         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
 229                         " %s\n", config_item_name(item));
 230
 231         tf_group = &tf->tf_group;
 232         for (i = 0; tf_group->default_groups[i]; i++) {
 233                 df_item = &tf_group->default_groups[i]->cg_item;
 234                 tf_group->default_groups[i] = NULL;
 235                 config_item_put(df_item);
 236         }
 237         config_item_put(item);
 238 }
 239
 240 static struct configfs_group_operations target_core_fabric_group_ops = {
 241         .make_group     = &target_core_register_fabric,
 242         .drop_item      = &target_core_deregister_fabric,
 243 };
 244
 245 /*
 246  * All item attributes appearing in /sys/kernel/target/ appear here.
 247  */
 248 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
 249         &target_core_item_attr_version,
 250         NULL,
 251 };
 252
 253 /*
 254  * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
 255  */
 256 static struct config_item_type target_core_fabrics_item = {
 257         .ct_item_ops    = &target_core_fabric_item_ops,
 258         .ct_group_ops   = &target_core_fabric_group_ops,
 259         .ct_attrs       = target_core_fabric_item_attrs,
 260         .ct_owner       = THIS_MODULE,
 261 };
 262
 263 static struct configfs_subsystem target_core_fabrics = {
 264         .su_group = {
 265                 .cg_item = {
 266                         .ci_namebuf = "target",
 267                         .ci_type = &target_core_fabrics_item,
 268                 },
 269         },
 270 };
 271
 272 static struct configfs_subsystem *target_core_subsystem[] = {
 273         &target_core_fabrics,
 274         NULL,
 275 };
 276
 277 /*##############################################################################
 278 // Start functions called by external Target Fabrics Modules
 279 //############################################################################*/
 280
 281 /*
 282  * First function called by fabric modules to:
 283  *
 284  * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
 285  * 2) Add struct target_fabric_configfs to g_tf_list
 286  * 3) Return struct target_fabric_configfs to fabric module to be passed
 287  *    into target_fabric_configfs_register().
 288  */
 289 struct target_fabric_configfs *target_fabric_configfs_init(
 290         struct module *fabric_mod,
 291         const char *name)
 292 {
 293         struct target_fabric_configfs *tf;
 294
 295         if (!(name)) {
 296                 pr_err("Unable to locate passed fabric name\n");
 297                 return ERR_PTR(-EINVAL);
 298         }
 299         if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
 300                 pr_err("Passed name: %s exceeds TARGET_FABRIC"
 301                         "_NAME_SIZE\n", name);
 302                 return ERR_PTR(-EINVAL);
 303         }
 304
 305         tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
 306         if (!tf)
 307                 return ERR_PTR(-ENOMEM);
 308
 309         INIT_LIST_HEAD(&tf->tf_list);
 310         atomic_set(&tf->tf_access_cnt, 0);
 311         /*
 312          * Setup the default generic struct config_item_type's (cits) in
 313          * struct target_fabric_configfs->tf_cit_tmpl
 314          */
 315         tf->tf_module = fabric_mod;
 316         target_fabric_setup_cits(tf);
 317
 318         tf->tf_subsys = target_core_subsystem[0];
 319         snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
 320
 321         mutex_lock(&g_tf_lock);
 322         list_add_tail(&tf->tf_list, &g_tf_list);
 323         mutex_unlock(&g_tf_lock);
 324
 325         pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
 326                         ">>>>>>>>>>>>>>\n");
 327         pr_debug("Initialized struct target_fabric_configfs: %p for"
 328                         " %s\n", tf, tf->tf_name);
 329         return tf;
 330 }
 331 EXPORT_SYMBOL(target_fabric_configfs_init);
 332
 333 /*
 334  * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
 335  */
 336 void target_fabric_configfs_free(
 337         struct target_fabric_configfs *tf)
 338 {
 339         mutex_lock(&g_tf_lock);
 340         list_del(&tf->tf_list);
 341         mutex_unlock(&g_tf_lock);
 342
 343         kfree(tf);
 344 }
 345 EXPORT_SYMBOL(target_fabric_configfs_free);
 346
 347 /*
 348  * Perform a sanity check of the passed tf->tf_ops before completing
 349  * TCM fabric module registration.
 350  */
 351 static int target_fabric_tf_ops_check(
 352         struct target_fabric_configfs *tf)
 353 {
 354         struct target_core_fabric_ops *tfo = &tf->tf_ops;
 355
 356         if (!tfo->get_fabric_name) {
 357                 pr_err("Missing tfo->get_fabric_name()\n");
 358                 return -EINVAL;
 359         }
 360         if (!tfo->get_fabric_proto_ident) {
 361                 pr_err("Missing tfo->get_fabric_proto_ident()\n");
 362                 return -EINVAL;
 363         }
 364         if (!tfo->tpg_get_wwn) {
 365                 pr_err("Missing tfo->tpg_get_wwn()\n");
 366                 return -EINVAL;
 367         }
 368         if (!tfo->tpg_get_tag) {
 369                 pr_err("Missing tfo->tpg_get_tag()\n");
 370                 return -EINVAL;
 371         }
 372         if (!tfo->tpg_get_default_depth) {
 373                 pr_err("Missing tfo->tpg_get_default_depth()\n");
 374                 return -EINVAL;
 375         }
 376         if (!tfo->tpg_get_pr_transport_id) {
 377                 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
 378                 return -EINVAL;
 379         }
 380         if (!tfo->tpg_get_pr_transport_id_len) {
 381                 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
 382                 return -EINVAL;
 383         }
 384         if (!tfo->tpg_check_demo_mode) {
 385                 pr_err("Missing tfo->tpg_check_demo_mode()\n");
 386                 return -EINVAL;
 387         }
 388         if (!tfo->tpg_check_demo_mode_cache) {
 389                 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
 390                 return -EINVAL;
 391         }
 392         if (!tfo->tpg_check_demo_mode_write_protect) {
 393                 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
 394                 return -EINVAL;
 395         }
 396         if (!tfo->tpg_check_prod_mode_write_protect) {
 397                 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
 398                 return -EINVAL;
 399         }
 400         if (!tfo->tpg_alloc_fabric_acl) {
 401                 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
 402                 return -EINVAL;
 403         }
 404         if (!tfo->tpg_release_fabric_acl) {
 405                 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
 406                 return -EINVAL;
 407         }
 408         if (!tfo->tpg_get_inst_index) {
 409                 pr_err("Missing tfo->tpg_get_inst_index()\n");
 410                 return -EINVAL;
 411         }
 412         if (!tfo->release_cmd) {
 413                 pr_err("Missing tfo->release_cmd()\n");
 414                 return -EINVAL;
 415         }
 416         if (!tfo->shutdown_session) {
 417                 pr_err("Missing tfo->shutdown_session()\n");
 418                 return -EINVAL;
 419         }
 420         if (!tfo->close_session) {
 421                 pr_err("Missing tfo->close_session()\n");
 422                 return -EINVAL;
 423         }
 424         if (!tfo->sess_get_index) {
 425                 pr_err("Missing tfo->sess_get_index()\n");
 426                 return -EINVAL;
 427         }
 428         if (!tfo->write_pending) {
 429                 pr_err("Missing tfo->write_pending()\n");
 430                 return -EINVAL;
 431         }
 432         if (!tfo->write_pending_status) {
 433                 pr_err("Missing tfo->write_pending_status()\n");
 434                 return -EINVAL;
 435         }
 436         if (!tfo->set_default_node_attributes) {
 437                 pr_err("Missing tfo->set_default_node_attributes()\n");
 438                 return -EINVAL;
 439         }
 440         if (!tfo->get_task_tag) {
 441                 pr_err("Missing tfo->get_task_tag()\n");
 442                 return -EINVAL;
 443         }
 444         if (!tfo->get_cmd_state) {
 445                 pr_err("Missing tfo->get_cmd_state()\n");
 446                 return -EINVAL;
 447         }
 448         if (!tfo->queue_data_in) {
 449                 pr_err("Missing tfo->queue_data_in()\n");
 450                 return -EINVAL;
 451         }
 452         if (!tfo->queue_status) {
 453                 pr_err("Missing tfo->queue_status()\n");
 454                 return -EINVAL;
 455         }
 456         if (!tfo->queue_tm_rsp) {
 457                 pr_err("Missing tfo->queue_tm_rsp()\n");
 458                 return -EINVAL;
 459         }
 460         if (!tfo->set_fabric_sense_len) {
 461                 pr_err("Missing tfo->set_fabric_sense_len()\n");
 462                 return -EINVAL;
 463         }
 464         /*
 465          * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
 466          * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
 467          * target_core_fabric_configfs.c WWN+TPG group context code.
 468          */
 469         if (!tfo->fabric_make_wwn) {
 470                 pr_err("Missing tfo->fabric_make_wwn()\n");
 471                 return -EINVAL;
 472         }
 473         if (!tfo->fabric_drop_wwn) {
 474                 pr_err("Missing tfo->fabric_drop_wwn()\n");
 475                 return -EINVAL;
 476         }
 477         if (!tfo->fabric_make_tpg) {
 478                 pr_err("Missing tfo->fabric_make_tpg()\n");
 479                 return -EINVAL;
 480         }
 481         if (!tfo->fabric_drop_tpg) {
 482                 pr_err("Missing tfo->fabric_drop_tpg()\n");
 483                 return -EINVAL;
 484         }
 485
 486         return 0;
 487 }
 488
 489 /*
 490  * Called 2nd from fabric module with returned parameter of
 491  * struct target_fabric_configfs * from target_fabric_configfs_init().
 492  *
 493  * Upon a successful registration, the new fabric's struct config_item is
 494  * return.  Also, a pointer to this struct is set in the passed
 495  * struct target_fabric_configfs.
 496  */
 497 int target_fabric_configfs_register(
 498         struct target_fabric_configfs *tf)
 499 {
 500         int ret;
 501
 502         if (!tf) {
 503                 pr_err("Unable to locate target_fabric_configfs"
 504                         " pointer\n");
 505                 return -EINVAL;
 506         }
 507         if (!tf->tf_subsys) {
 508                 pr_err("Unable to target struct config_subsystem"
 509                         " pointer\n");
 510                 return -EINVAL;
 511         }
 512         ret = target_fabric_tf_ops_check(tf);
 513         if (ret < 0)
 514                 return ret;
 515
 516         pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
 517                 ">>>>>>>>>>\n");
 518         return 0;
 519 }
 520 EXPORT_SYMBOL(target_fabric_configfs_register);
 521
 522 void target_fabric_configfs_deregister(
 523         struct target_fabric_configfs *tf)
 524 {
 525         struct configfs_subsystem *su;
 526
 527         if (!tf) {
 528                 pr_err("Unable to locate passed target_fabric_"
 529                         "configfs\n");
 530                 return;
 531         }
 532         su = tf->tf_subsys;
 533         if (!su) {
 534                 pr_err("Unable to locate passed tf->tf_subsys"
 535                         " pointer\n");
 536                 return;
 537         }
 538         pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
 539                         ">>>>>>>>>>>>\n");
 540         mutex_lock(&g_tf_lock);
 541         if (atomic_read(&tf->tf_access_cnt)) {
 542                 mutex_unlock(&g_tf_lock);
 543                 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
 544                         tf->tf_name);
 545                 BUG();
 546         }
 547         list_del(&tf->tf_list);
 548         mutex_unlock(&g_tf_lock);
 549
 550         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
 551                         " %s\n", tf->tf_name);
 552         tf->tf_module = NULL;
 553         tf->tf_subsys = NULL;
 554         kfree(tf);
 555
 556         pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
 557                         ">>>>>\n");
 558 }
 559 EXPORT_SYMBOL(target_fabric_configfs_deregister);
 560
 561 /*##############################################################################
 562 // Stop functions called by external Target Fabrics Modules
 563 //############################################################################*/
 564
 565 /* Start functions for struct config_item_type target_core_dev_attrib_cit */
 566
 567 #define DEF_DEV_ATTRIB_SHOW(_name)                                      \
 568 static ssize_t target_core_dev_show_attr_##_name(                       \
 569         struct se_dev_attrib *da,                                       \
 570         char *page)                                                     \
 571 {                                                                       \
 572         struct se_device *dev;                                          \
 573         struct se_subsystem_dev *se_dev = da->da_sub_dev;                       \
 574         ssize_t rb;                                                     \
 575                                                                         \
 576         spin_lock(&se_dev->se_dev_lock);                                \
 577         dev = se_dev->se_dev_ptr;                                       \
 578         if (!dev) {                                                     \
 579                 spin_unlock(&se_dev->se_dev_lock);                      \
 580                 return -ENODEV;                                         \
 581         }                                                               \
 582         rb = snprintf(page, PAGE_SIZE, "%u\n",                          \
 583                 (u32)dev->se_sub_dev->se_dev_attrib._name);             \
 584         spin_unlock(&se_dev->se_dev_lock);                              \
 585                                                                         \
 586         return rb;                                                      \
 587 }
 588
 589 #define DEF_DEV_ATTRIB_STORE(_name)                                     \
 590 static ssize_t target_core_dev_store_attr_##_name(                      \
 591         struct se_dev_attrib *da,                                       \
 592         const char *page,                                               \
 593         size_t count)                                                   \
 594 {                                                                       \
 595         struct se_device *dev;                                          \
 596         struct se_subsystem_dev *se_dev = da->da_sub_dev;                       \
 597         unsigned long val;                                              \
 598         int ret;                                                        \
 599                                                                         \
 600         spin_lock(&se_dev->se_dev_lock);                                \
 601         dev = se_dev->se_dev_ptr;                                       \
 602         if (!dev) {                                                     \
 603                 spin_unlock(&se_dev->se_dev_lock);                      \
 604                 return -ENODEV;                                         \
 605         }                                                               \
 606         ret = strict_strtoul(page, 0, &val);                            \
 607         if (ret < 0) {                                                  \
 608                 spin_unlock(&se_dev->se_dev_lock);                      \
 609                 pr_err("strict_strtoul() failed with"           \
 610                         " ret: %d\n", ret);                             \
 611                 return -EINVAL;                                         \
 612         }                                                               \
 613         ret = se_dev_set_##_name(dev, (u32)val);                        \
 614         spin_unlock(&se_dev->se_dev_lock);                              \
 615                                                                         \
 616         return (!ret) ? count : -EINVAL;                                \
 617 }
 618
 619 #define DEF_DEV_ATTRIB(_name)                                           \
 620 DEF_DEV_ATTRIB_SHOW(_name);                                             \
 621 DEF_DEV_ATTRIB_STORE(_name);
 622
 623 #define DEF_DEV_ATTRIB_RO(_name)                                        \
 624 DEF_DEV_ATTRIB_SHOW(_name);
 625
 626 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
 627 #define SE_DEV_ATTR(_name, _mode)                                       \
 628 static struct target_core_dev_attrib_attribute                          \
 629                         target_core_dev_attrib_##_name =                \
 630                 __CONFIGFS_EATTR(_name, _mode,                          \
 631                 target_core_dev_show_attr_##_name,                      \
 632                 target_core_dev_store_attr_##_name);
 633
 634 #define SE_DEV_ATTR_RO(_name);                                          \
 635 static struct target_core_dev_attrib_attribute                          \
 636                         target_core_dev_attrib_##_name =                \
 637         __CONFIGFS_EATTR_RO(_name,                                      \
 638         target_core_dev_show_attr_##_name);
 639
 640 DEF_DEV_ATTRIB(emulate_dpo);
 641 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
 642
 643 DEF_DEV_ATTRIB(emulate_fua_write);
 644 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
 645
 646 DEF_DEV_ATTRIB(emulate_fua_read);
 647 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
 648
 649 DEF_DEV_ATTRIB(emulate_write_cache);
 650 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
 651
 652 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
 653 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
 654
 655 DEF_DEV_ATTRIB(emulate_tas);
 656 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
 657
 658 DEF_DEV_ATTRIB(emulate_tpu);
 659 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
 660
 661 DEF_DEV_ATTRIB(emulate_tpws);
 662 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
 663
 664 DEF_DEV_ATTRIB(enforce_pr_isids);
 665 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
 666
 667 DEF_DEV_ATTRIB(is_nonrot);
 668 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
 669
 670 DEF_DEV_ATTRIB(emulate_rest_reord);
 671 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
 672
 673 DEF_DEV_ATTRIB_RO(hw_block_size);
 674 SE_DEV_ATTR_RO(hw_block_size);
 675
 676 DEF_DEV_ATTRIB(block_size);
 677 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
 678
 679 DEF_DEV_ATTRIB_RO(hw_max_sectors);
 680 SE_DEV_ATTR_RO(hw_max_sectors);
 681
 682 DEF_DEV_ATTRIB(fabric_max_sectors);
 683 SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR);
 684
 685 DEF_DEV_ATTRIB(optimal_sectors);
 686 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
 687
 688 DEF_DEV_ATTRIB_RO(hw_queue_depth);
 689 SE_DEV_ATTR_RO(hw_queue_depth);
 690
 691 DEF_DEV_ATTRIB(queue_depth);
 692 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
 693
 694 DEF_DEV_ATTRIB(max_unmap_lba_count);
 695 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
 696
 697 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
 698 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
 699
 700 DEF_DEV_ATTRIB(unmap_granularity);
 701 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
 702
 703 DEF_DEV_ATTRIB(unmap_granularity_alignment);
 704 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
 705
 706 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
 707
 708 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
 709         &target_core_dev_attrib_emulate_dpo.attr,
 710         &target_core_dev_attrib_emulate_fua_write.attr,
 711         &target_core_dev_attrib_emulate_fua_read.attr,
 712         &target_core_dev_attrib_emulate_write_cache.attr,
 713         &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
 714         &target_core_dev_attrib_emulate_tas.attr,
 715         &target_core_dev_attrib_emulate_tpu.attr,
 716         &target_core_dev_attrib_emulate_tpws.attr,
 717         &target_core_dev_attrib_enforce_pr_isids.attr,
 718         &target_core_dev_attrib_is_nonrot.attr,
 719         &target_core_dev_attrib_emulate_rest_reord.attr,
 720         &target_core_dev_attrib_hw_block_size.attr,
 721         &target_core_dev_attrib_block_size.attr,
 722         &target_core_dev_attrib_hw_max_sectors.attr,
 723         &target_core_dev_attrib_fabric_max_sectors.attr,
 724         &target_core_dev_attrib_optimal_sectors.attr,
 725         &target_core_dev_attrib_hw_queue_depth.attr,
 726         &target_core_dev_attrib_queue_depth.attr,
 727         &target_core_dev_attrib_max_unmap_lba_count.attr,
 728         &target_core_dev_attrib_max_unmap_block_desc_count.attr,
 729         &target_core_dev_attrib_unmap_granularity.attr,
 730         &target_core_dev_attrib_unmap_granularity_alignment.attr,
 731         NULL,
 732 };
 733
 734 static struct configfs_item_operations target_core_dev_attrib_ops = {
 735         .show_attribute         = target_core_dev_attrib_attr_show,
 736         .store_attribute        = target_core_dev_attrib_attr_store,
 737 };
 738
 739 static struct config_item_type target_core_dev_attrib_cit = {
 740         .ct_item_ops            = &target_core_dev_attrib_ops,
 741         .ct_attrs               = target_core_dev_attrib_attrs,
 742         .ct_owner               = THIS_MODULE,
 743 };
 744
 745 /* End functions for struct config_item_type target_core_dev_attrib_cit */
 746
 747 /*  Start functions for struct config_item_type target_core_dev_wwn_cit */
 748
 749 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
 750 #define SE_DEV_WWN_ATTR(_name, _mode)                                   \
 751 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
 752                 __CONFIGFS_EATTR(_name, _mode,                          \
 753                 target_core_dev_wwn_show_attr_##_name,                  \
 754                 target_core_dev_wwn_store_attr_##_name);
 755
 756 #define SE_DEV_WWN_ATTR_RO(_name);                                      \
 757 do {                                                                    \
 758         static struct target_core_dev_wwn_attribute                     \
 759                         target_core_dev_wwn_##_name =                   \
 760                 __CONFIGFS_EATTR_RO(_name,                              \
 761                 target_core_dev_wwn_show_attr_##_name);                 \
 762 } while (0);
 763
 764 /*
 765  * VPD page 0x80 Unit serial
 766  */
 767 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
 768         struct t10_wwn *t10_wwn,
 769         char *page)
 770 {
 771         struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
 772         struct se_device *dev;
 773
 774         dev = se_dev->se_dev_ptr;
 775         if (!dev)
 776                 return -ENODEV;
 777
 778         return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
 779                 &t10_wwn->unit_serial[0]);
 780 }
 781
 782 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
 783         struct t10_wwn *t10_wwn,
 784         const char *page,
 785         size_t count)
 786 {
 787         struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev;
 788         struct se_device *dev;
 789         unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
 790
 791         /*
 792          * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
 793          * from the struct scsi_device level firmware, do not allow
 794          * VPD Unit Serial to be emulated.
 795          *
 796          * Note this struct scsi_device could also be emulating VPD
 797          * information from its drivers/scsi LLD.  But for now we assume
 798          * it is doing 'the right thing' wrt a world wide unique
 799          * VPD Unit Serial Number that OS dependent multipath can depend on.
 800          */
 801         if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) {
 802                 pr_err("Underlying SCSI device firmware provided VPD"
 803                         " Unit Serial, ignoring request\n");
 804                 return -EOPNOTSUPP;
 805         }
 806
 807         if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
 808                 pr_err("Emulated VPD Unit Serial exceeds"
 809                 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
 810                 return -EOVERFLOW;
 811         }
 812         /*
 813          * Check to see if any active $FABRIC_MOD exports exist.  If they
 814          * do exist, fail here as changing this information on the fly
 815          * (underneath the initiator side OS dependent multipath code)
 816          * could cause negative effects.
 817          */
 818         dev = su_dev->se_dev_ptr;
 819         if (dev) {
 820                 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
 821                         pr_err("Unable to set VPD Unit Serial while"
 822                                 " active %d $FABRIC_MOD exports exist\n",
 823                                 atomic_read(&dev->dev_export_obj.obj_access_count));
 824                         return -EINVAL;
 825                 }
 826         }
 827         /*
 828          * This currently assumes ASCII encoding for emulated VPD Unit Serial.
 829          *
 830          * Also, strip any newline added from the userspace
 831          * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
 832          */
 833         memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
 834         snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
 835         snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
 836                         "%s", strstrip(buf));
 837         su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL;
 838
 839         pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
 840                         " %s\n", su_dev->t10_wwn.unit_serial);
 841
 842         return count;
 843 }
 844
 845 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
 846
 847 /*
 848  * VPD page 0x83 Protocol Identifier
 849  */
 850 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
 851         struct t10_wwn *t10_wwn,
 852         char *page)
 853 {
 854         struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
 855         struct se_device *dev;
 856         struct t10_vpd *vpd;
 857         unsigned char buf[VPD_TMP_BUF_SIZE];
 858         ssize_t len = 0;
 859
 860         dev = se_dev->se_dev_ptr;
 861         if (!dev)
 862                 return -ENODEV;
 863
 864         memset(buf, 0, VPD_TMP_BUF_SIZE);
 865
 866         spin_lock(&t10_wwn->t10_vpd_lock);
 867         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
 868                 if (!vpd->protocol_identifier_set)
 869                         continue;
 870
 871                 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
 872
 873                 if (len + strlen(buf) >= PAGE_SIZE)
 874                         break;
 875
 876                 len += sprintf(page+len, "%s", buf);
 877         }
 878         spin_unlock(&t10_wwn->t10_vpd_lock);
 879
 880         return len;
 881 }
 882
 883 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
 884         struct t10_wwn *t10_wwn,
 885         const char *page,
 886         size_t count)
 887 {
 888         return -ENOSYS;
 889 }
 890
 891 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
 892
 893 /*
 894  * Generic wrapper for dumping VPD identifiers by association.
 895  */
 896 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc)                           \
 897 static ssize_t target_core_dev_wwn_show_attr_##_name(                   \
 898         struct t10_wwn *t10_wwn,                                        \
 899         char *page)                                                     \
 900 {                                                                       \
 901         struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;         \
 902         struct se_device *dev;                                          \
 903         struct t10_vpd *vpd;                                                    \
 904         unsigned char buf[VPD_TMP_BUF_SIZE];                            \
 905         ssize_t len = 0;                                                \
 906                                                                         \
 907         dev = se_dev->se_dev_ptr;                                       \
 908         if (!dev)                                                       \
 909                 return -ENODEV;                                         \
 910                                                                         \
 911         spin_lock(&t10_wwn->t10_vpd_lock);                              \
 912         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {    \
 913                 if (vpd->association != _assoc)                         \
 914                         continue;                                       \
 915                                                                         \
 916                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 917                 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE);   \
 918                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 919                         break;                                          \
 920                 len += sprintf(page+len, "%s", buf);                    \
 921                                                                         \
 922                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
 923                 transport_dump_vpd_ident_type(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(vpd, buf, VPD_TMP_BUF_SIZE); \
 930                 if (len + strlen(buf) >= PAGE_SIZE)                     \
 931                         break;                                          \
 932                 len += sprintf(page+len, "%s", buf);                    \
 933         }                                                               \
 934         spin_unlock(&t10_wwn->t10_vpd_lock);                            \
 935                                                                         \
 936         return len;                                                     \
 937 }
 938
 939 /*
 940  * VPD page 0x83 Association: Logical Unit
 941  */
 942 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
 943
 944 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
 945         struct t10_wwn *t10_wwn,
 946         const char *page,
 947         size_t count)
 948 {
 949         return -ENOSYS;
 950 }
 951
 952 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
 953
 954 /*
 955  * VPD page 0x83 Association: Target Port
 956  */
 957 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
 958
 959 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
 960         struct t10_wwn *t10_wwn,
 961         const char *page,
 962         size_t count)
 963 {
 964         return -ENOSYS;
 965 }
 966
 967 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
 968
 969 /*
 970  * VPD page 0x83 Association: SCSI Target Device
 971  */
 972 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
 973
 974 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
 975         struct t10_wwn *t10_wwn,
 976         const char *page,
 977         size_t count)
 978 {
 979         return -ENOSYS;
 980 }
 981
 982 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
 983
 984 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
 985
 986 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
 987         &target_core_dev_wwn_vpd_unit_serial.attr,
 988         &target_core_dev_wwn_vpd_protocol_identifier.attr,
 989         &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
 990         &target_core_dev_wwn_vpd_assoc_target_port.attr,
 991         &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
 992         NULL,
 993 };
 994
 995 static struct configfs_item_operations target_core_dev_wwn_ops = {
 996         .show_attribute         = target_core_dev_wwn_attr_show,
 997         .store_attribute        = target_core_dev_wwn_attr_store,
 998 };
 999
1000 static struct config_item_type target_core_dev_wwn_cit = {
1001         .ct_item_ops            = &target_core_dev_wwn_ops,
1002         .ct_attrs               = target_core_dev_wwn_attrs,
1003         .ct_owner               = THIS_MODULE,
1004 };
1005
1006 /*  End functions for struct config_item_type target_core_dev_wwn_cit */
1007
1008 /*  Start functions for struct config_item_type target_core_dev_pr_cit */
1009
1010 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev);
1011 #define SE_DEV_PR_ATTR(_name, _mode)                                    \
1012 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1013         __CONFIGFS_EATTR(_name, _mode,                                  \
1014         target_core_dev_pr_show_attr_##_name,                           \
1015         target_core_dev_pr_store_attr_##_name);
1016
1017 #define SE_DEV_PR_ATTR_RO(_name);                                       \
1018 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1019         __CONFIGFS_EATTR_RO(_name,                                      \
1020         target_core_dev_pr_show_attr_##_name);
1021
1022 /*
1023  * res_holder
1024  */
1025 static ssize_t target_core_dev_pr_show_spc3_res(
1026         struct se_device *dev,
1027         char *page,
1028         ssize_t *len)
1029 {
1030         struct se_node_acl *se_nacl;
1031         struct t10_pr_registration *pr_reg;
1032         char i_buf[PR_REG_ISID_ID_LEN];
1033         int prf_isid;
1034
1035         memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1036
1037         spin_lock(&dev->dev_reservation_lock);
1038         pr_reg = dev->dev_pr_res_holder;
1039         if (!pr_reg) {
1040                 *len += sprintf(page + *len, "No SPC-3 Reservation holder\n");
1041                 spin_unlock(&dev->dev_reservation_lock);
1042                 return *len;
1043         }
1044         se_nacl = pr_reg->pr_reg_nacl;
1045         prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1046                                 PR_REG_ISID_ID_LEN);
1047
1048         *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n",
1049                 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1050                 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
1051         spin_unlock(&dev->dev_reservation_lock);
1052
1053         return *len;
1054 }
1055
1056 static ssize_t target_core_dev_pr_show_spc2_res(
1057         struct se_device *dev,
1058         char *page,
1059         ssize_t *len)
1060 {
1061         struct se_node_acl *se_nacl;
1062
1063         spin_lock(&dev->dev_reservation_lock);
1064         se_nacl = dev->dev_reserved_node_acl;
1065         if (!se_nacl) {
1066                 *len += sprintf(page + *len, "No SPC-2 Reservation holder\n");
1067                 spin_unlock(&dev->dev_reservation_lock);
1068                 return *len;
1069         }
1070         *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n",
1071                 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1072                 se_nacl->initiatorname);
1073         spin_unlock(&dev->dev_reservation_lock);
1074
1075         return *len;
1076 }
1077
1078 static ssize_t target_core_dev_pr_show_attr_res_holder(
1079         struct se_subsystem_dev *su_dev,
1080         char *page)
1081 {
1082         ssize_t len = 0;
1083
1084         if (!su_dev->se_dev_ptr)
1085                 return -ENODEV;
1086
1087         switch (su_dev->t10_pr.res_type) {
1088         case SPC3_PERSISTENT_RESERVATIONS:
1089                 target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr,
1090                                 page, &len);
1091                 break;
1092         case SPC2_RESERVATIONS:
1093                 target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr,
1094                                 page, &len);
1095                 break;
1096         case SPC_PASSTHROUGH:
1097                 len += sprintf(page+len, "Passthrough\n");
1098                 break;
1099         default:
1100                 len += sprintf(page+len, "Unknown\n");
1101                 break;
1102         }
1103
1104         return len;
1105 }
1106
1107 SE_DEV_PR_ATTR_RO(res_holder);
1108
1109 /*
1110  * res_pr_all_tgt_pts
1111  */
1112 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1113         struct se_subsystem_dev *su_dev,
1114         char *page)
1115 {
1116         struct se_device *dev;
1117         struct t10_pr_registration *pr_reg;
1118         ssize_t len = 0;
1119
1120         dev = su_dev->se_dev_ptr;
1121         if (!dev)
1122                 return -ENODEV;
1123
1124         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1125                 return len;
1126
1127         spin_lock(&dev->dev_reservation_lock);
1128         pr_reg = dev->dev_pr_res_holder;
1129         if (!pr_reg) {
1130                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1131                 spin_unlock(&dev->dev_reservation_lock);
1132                 return len;
1133         }
1134         /*
1135          * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3
1136          * Basic PERSISTENT RESERVER OUT parameter list, page 290
1137          */
1138         if (pr_reg->pr_reg_all_tg_pt)
1139                 len = sprintf(page, "SPC-3 Reservation: All Target"
1140                         " Ports registration\n");
1141         else
1142                 len = sprintf(page, "SPC-3 Reservation: Single"
1143                         " Target Port registration\n");
1144         spin_unlock(&dev->dev_reservation_lock);
1145
1146         return len;
1147 }
1148
1149 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1150
1151 /*
1152  * res_pr_generation
1153  */
1154 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1155         struct se_subsystem_dev *su_dev,
1156         char *page)
1157 {
1158         if (!su_dev->se_dev_ptr)
1159                 return -ENODEV;
1160
1161         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1162                 return 0;
1163
1164         return sprintf(page, "0x%08x\n", su_dev->t10_pr.pr_generation);
1165 }
1166
1167 SE_DEV_PR_ATTR_RO(res_pr_generation);
1168
1169 /*
1170  * res_pr_holder_tg_port
1171  */
1172 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1173         struct se_subsystem_dev *su_dev,
1174         char *page)
1175 {
1176         struct se_device *dev;
1177         struct se_node_acl *se_nacl;
1178         struct se_lun *lun;
1179         struct se_portal_group *se_tpg;
1180         struct t10_pr_registration *pr_reg;
1181         struct target_core_fabric_ops *tfo;
1182         ssize_t len = 0;
1183
1184         dev = su_dev->se_dev_ptr;
1185         if (!dev)
1186                 return -ENODEV;
1187
1188         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1189                 return len;
1190
1191         spin_lock(&dev->dev_reservation_lock);
1192         pr_reg = dev->dev_pr_res_holder;
1193         if (!pr_reg) {
1194                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1195                 spin_unlock(&dev->dev_reservation_lock);
1196                 return len;
1197         }
1198         se_nacl = pr_reg->pr_reg_nacl;
1199         se_tpg = se_nacl->se_tpg;
1200         lun = pr_reg->pr_reg_tg_pt_lun;
1201         tfo = se_tpg->se_tpg_tfo;
1202
1203         len += sprintf(page+len, "SPC-3 Reservation: %s"
1204                 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1205                 tfo->tpg_get_wwn(se_tpg));
1206         len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1207                 " Identifer Tag: %hu %s Portal Group Tag: %hu"
1208                 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1209                 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1210                 tfo->get_fabric_name(), lun->unpacked_lun);
1211         spin_unlock(&dev->dev_reservation_lock);
1212
1213         return len;
1214 }
1215
1216 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1217
1218 /*
1219  * res_pr_registered_i_pts
1220  */
1221 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1222         struct se_subsystem_dev *su_dev,
1223         char *page)
1224 {
1225         struct target_core_fabric_ops *tfo;
1226         struct t10_pr_registration *pr_reg;
1227         unsigned char buf[384];
1228         char i_buf[PR_REG_ISID_ID_LEN];
1229         ssize_t len = 0;
1230         int reg_count = 0, prf_isid;
1231
1232         if (!su_dev->se_dev_ptr)
1233                 return -ENODEV;
1234
1235         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1236                 return len;
1237
1238         len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1239
1240         spin_lock(&su_dev->t10_pr.registration_lock);
1241         list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list,
1242                         pr_reg_list) {
1243
1244                 memset(buf, 0, 384);
1245                 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1246                 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1247                 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1248                                         PR_REG_ISID_ID_LEN);
1249                 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1250                         tfo->get_fabric_name(),
1251                         pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
1252                         &i_buf[0] : "", pr_reg->pr_res_key,
1253                         pr_reg->pr_res_generation);
1254
1255                 if (len + strlen(buf) >= PAGE_SIZE)
1256                         break;
1257
1258                 len += sprintf(page+len, "%s", buf);
1259                 reg_count++;
1260         }
1261         spin_unlock(&su_dev->t10_pr.registration_lock);
1262
1263         if (!reg_count)
1264                 len += sprintf(page+len, "None\n");
1265
1266         return len;
1267 }
1268
1269 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1270
1271 /*
1272  * res_pr_type
1273  */
1274 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1275         struct se_subsystem_dev *su_dev,
1276         char *page)
1277 {
1278         struct se_device *dev;
1279         struct t10_pr_registration *pr_reg;
1280         ssize_t len = 0;
1281
1282         dev = su_dev->se_dev_ptr;
1283         if (!dev)
1284                 return -ENODEV;
1285
1286         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1287                 return len;
1288
1289         spin_lock(&dev->dev_reservation_lock);
1290         pr_reg = dev->dev_pr_res_holder;
1291         if (!pr_reg) {
1292                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1293                 spin_unlock(&dev->dev_reservation_lock);
1294                 return len;
1295         }
1296         len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1297                 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1298         spin_unlock(&dev->dev_reservation_lock);
1299
1300         return len;
1301 }
1302
1303 SE_DEV_PR_ATTR_RO(res_pr_type);
1304
1305 /*
1306  * res_type
1307  */
1308 static ssize_t target_core_dev_pr_show_attr_res_type(
1309         struct se_subsystem_dev *su_dev,
1310         char *page)
1311 {
1312         ssize_t len = 0;
1313
1314         if (!su_dev->se_dev_ptr)
1315                 return -ENODEV;
1316
1317         switch (su_dev->t10_pr.res_type) {
1318         case SPC3_PERSISTENT_RESERVATIONS:
1319                 len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1320                 break;
1321         case SPC2_RESERVATIONS:
1322                 len = sprintf(page, "SPC2_RESERVATIONS\n");
1323                 break;
1324         case SPC_PASSTHROUGH:
1325                 len = sprintf(page, "SPC_PASSTHROUGH\n");
1326                 break;
1327         default:
1328                 len = sprintf(page, "UNKNOWN\n");
1329                 break;
1330         }
1331
1332         return len;
1333 }
1334
1335 SE_DEV_PR_ATTR_RO(res_type);
1336
1337 /*
1338  * res_aptpl_active
1339  */
1340
1341 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1342         struct se_subsystem_dev *su_dev,
1343         char *page)
1344 {
1345         if (!su_dev->se_dev_ptr)
1346                 return -ENODEV;
1347
1348         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1349                 return 0;
1350
1351         return sprintf(page, "APTPL Bit Status: %s\n",
1352                 (su_dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1353 }
1354
1355 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1356
1357 /*
1358  * res_aptpl_metadata
1359  */
1360 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1361         struct se_subsystem_dev *su_dev,
1362         char *page)
1363 {
1364         if (!su_dev->se_dev_ptr)
1365                 return -ENODEV;
1366
1367         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1368                 return 0;
1369
1370         return sprintf(page, "Ready to process PR APTPL metadata..\n");
1371 }
1372
1373 enum {
1374         Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1375         Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1376         Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1377         Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1378 };
1379
1380 static match_table_t tokens = {
1381         {Opt_initiator_fabric, "initiator_fabric=%s"},
1382         {Opt_initiator_node, "initiator_node=%s"},
1383         {Opt_initiator_sid, "initiator_sid=%s"},
1384         {Opt_sa_res_key, "sa_res_key=%s"},
1385         {Opt_res_holder, "res_holder=%d"},
1386         {Opt_res_type, "res_type=%d"},
1387         {Opt_res_scope, "res_scope=%d"},
1388         {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1389         {Opt_mapped_lun, "mapped_lun=%d"},
1390         {Opt_target_fabric, "target_fabric=%s"},
1391         {Opt_target_node, "target_node=%s"},
1392         {Opt_tpgt, "tpgt=%d"},
1393         {Opt_port_rtpi, "port_rtpi=%d"},
1394         {Opt_target_lun, "target_lun=%d"},
1395         {Opt_err, NULL}
1396 };
1397
1398 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1399         struct se_subsystem_dev *su_dev,
1400         const char *page,
1401         size_t count)
1402 {
1403         struct se_device *dev;
1404         unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1405         unsigned char *t_fabric = NULL, *t_port = NULL;
1406         char *orig, *ptr, *arg_p, *opts;
1407         substring_t args[MAX_OPT_ARGS];
1408         unsigned long long tmp_ll;
1409         u64 sa_res_key = 0;
1410         u32 mapped_lun = 0, target_lun = 0;
1411         int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1412         u16 port_rpti = 0, tpgt = 0;
1413         u8 type = 0, scope;
1414
1415         dev = su_dev->se_dev_ptr;
1416         if (!dev)
1417                 return -ENODEV;
1418
1419         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1420                 return 0;
1421
1422         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1423                 pr_debug("Unable to process APTPL metadata while"
1424                         " active fabric exports exist\n");
1425                 return -EINVAL;
1426         }
1427
1428         opts = kstrdup(page, GFP_KERNEL);
1429         if (!opts)
1430                 return -ENOMEM;
1431
1432         orig = opts;
1433         while ((ptr = strsep(&opts, ",\n")) != NULL) {
1434                 if (!*ptr)
1435                         continue;
1436
1437                 token = match_token(ptr, tokens, args);
1438                 switch (token) {
1439                 case Opt_initiator_fabric:
1440                         i_fabric = match_strdup(&args[0]);
1441                         if (!i_fabric) {
1442                                 ret = -ENOMEM;
1443                                 goto out;
1444                         }
1445                         break;
1446                 case Opt_initiator_node:
1447                         i_port = match_strdup(&args[0]);
1448                         if (!i_port) {
1449                                 ret = -ENOMEM;
1450                                 goto out;
1451                         }
1452                         if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1453                                 pr_err("APTPL metadata initiator_node="
1454                                         " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1455                                         PR_APTPL_MAX_IPORT_LEN);
1456                                 ret = -EINVAL;
1457                                 break;
1458                         }
1459                         break;
1460                 case Opt_initiator_sid:
1461                         isid = match_strdup(&args[0]);
1462                         if (!isid) {
1463                                 ret = -ENOMEM;
1464                                 goto out;
1465                         }
1466                         if (strlen(isid) >= PR_REG_ISID_LEN) {
1467                                 pr_err("APTPL metadata initiator_isid"
1468                                         "= exceeds PR_REG_ISID_LEN: %d\n",
1469                                         PR_REG_ISID_LEN);
1470                                 ret = -EINVAL;
1471                                 break;
1472                         }
1473                         break;
1474                 case Opt_sa_res_key:
1475                         arg_p = match_strdup(&args[0]);
1476                         if (!arg_p) {
1477                                 ret = -ENOMEM;
1478                                 goto out;
1479                         }
1480                         ret = strict_strtoull(arg_p, 0, &tmp_ll);
1481                         if (ret < 0) {
1482                                 pr_err("strict_strtoull() failed for"
1483                                         " sa_res_key=\n");
1484                                 goto out;
1485                         }
1486                         sa_res_key = (u64)tmp_ll;
1487                         break;
1488                 /*
1489                  * PR APTPL Metadata for Reservation
1490                  */
1491                 case Opt_res_holder:
1492                         match_int(args, &arg);
1493                         res_holder = arg;
1494                         break;
1495                 case Opt_res_type:
1496                         match_int(args, &arg);
1497                         type = (u8)arg;
1498                         break;
1499                 case Opt_res_scope:
1500                         match_int(args, &arg);
1501                         scope = (u8)arg;
1502                         break;
1503                 case Opt_res_all_tg_pt:
1504                         match_int(args, &arg);
1505                         all_tg_pt = (int)arg;
1506                         break;
1507                 case Opt_mapped_lun:
1508                         match_int(args, &arg);
1509                         mapped_lun = (u32)arg;
1510                         break;
1511                 /*
1512                  * PR APTPL Metadata for Target Port
1513                  */
1514                 case Opt_target_fabric:
1515                         t_fabric = match_strdup(&args[0]);
1516                         if (!t_fabric) {
1517                                 ret = -ENOMEM;
1518                                 goto out;
1519                         }
1520                         break;
1521                 case Opt_target_node:
1522                         t_port = match_strdup(&args[0]);
1523                         if (!t_port) {
1524                                 ret = -ENOMEM;
1525                                 goto out;
1526                         }
1527                         if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1528                                 pr_err("APTPL metadata target_node="
1529                                         " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1530                                         PR_APTPL_MAX_TPORT_LEN);
1531                                 ret = -EINVAL;
1532                                 break;
1533                         }
1534                         break;
1535                 case Opt_tpgt:
1536                         match_int(args, &arg);
1537                         tpgt = (u16)arg;
1538                         break;
1539                 case Opt_port_rtpi:
1540                         match_int(args, &arg);
1541                         port_rpti = (u16)arg;
1542                         break;
1543                 case Opt_target_lun:
1544                         match_int(args, &arg);
1545                         target_lun = (u32)arg;
1546                         break;
1547                 default:
1548                         break;
1549                 }
1550         }
1551
1552         if (!i_port || !t_port || !sa_res_key) {
1553                 pr_err("Illegal parameters for APTPL registration\n");
1554                 ret = -EINVAL;
1555                 goto out;
1556         }
1557
1558         if (res_holder && !(type)) {
1559                 pr_err("Illegal PR type: 0x%02x for reservation"
1560                                 " holder\n", type);
1561                 ret = -EINVAL;
1562                 goto out;
1563         }
1564
1565         ret = core_scsi3_alloc_aptpl_registration(&su_dev->t10_pr, sa_res_key,
1566                         i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1567                         res_holder, all_tg_pt, type);
1568 out:
1569         kfree(i_fabric);
1570         kfree(i_port);
1571         kfree(isid);
1572         kfree(t_fabric);
1573         kfree(t_port);
1574         kfree(orig);
1575         return (ret == 0) ? count : ret;
1576 }
1577
1578 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1579
1580 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group);
1581
1582 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1583         &target_core_dev_pr_res_holder.attr,
1584         &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1585         &target_core_dev_pr_res_pr_generation.attr,
1586         &target_core_dev_pr_res_pr_holder_tg_port.attr,
1587         &target_core_dev_pr_res_pr_registered_i_pts.attr,
1588         &target_core_dev_pr_res_pr_type.attr,
1589         &target_core_dev_pr_res_type.attr,
1590         &target_core_dev_pr_res_aptpl_active.attr,
1591         &target_core_dev_pr_res_aptpl_metadata.attr,
1592         NULL,
1593 };
1594
1595 static struct configfs_item_operations target_core_dev_pr_ops = {
1596         .show_attribute         = target_core_dev_pr_attr_show,
1597         .store_attribute        = target_core_dev_pr_attr_store,
1598 };
1599
1600 static struct config_item_type target_core_dev_pr_cit = {
1601         .ct_item_ops            = &target_core_dev_pr_ops,
1602         .ct_attrs               = target_core_dev_pr_attrs,
1603         .ct_owner               = THIS_MODULE,
1604 };
1605
1606 /*  End functions for struct config_item_type target_core_dev_pr_cit */
1607
1608 /*  Start functions for struct config_item_type target_core_dev_cit */
1609
1610 static ssize_t target_core_show_dev_info(void *p, char *page)
1611 {
1612         struct se_subsystem_dev *se_dev = p;
1613         struct se_hba *hba = se_dev->se_dev_hba;
1614         struct se_subsystem_api *t = hba->transport;
1615         int bl = 0;
1616         ssize_t read_bytes = 0;
1617
1618         if (!se_dev->se_dev_ptr)
1619                 return -ENODEV;
1620
1621         transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl);
1622         read_bytes += bl;
1623         read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes);
1624         return read_bytes;
1625 }
1626
1627 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1628         .attr   = { .ca_owner = THIS_MODULE,
1629                     .ca_name = "info",
1630                     .ca_mode = S_IRUGO },
1631         .show   = target_core_show_dev_info,
1632         .store  = NULL,
1633 };
1634
1635 static ssize_t target_core_store_dev_control(
1636         void *p,
1637         const char *page,
1638         size_t count)
1639 {
1640         struct se_subsystem_dev *se_dev = p;
1641         struct se_hba *hba = se_dev->se_dev_hba;
1642         struct se_subsystem_api *t = hba->transport;
1643
1644         if (!se_dev->se_dev_su_ptr) {
1645                 pr_err("Unable to locate struct se_subsystem_dev>se"
1646                                 "_dev_su_ptr\n");
1647                 return -EINVAL;
1648         }
1649
1650         return t->set_configfs_dev_params(hba, se_dev, page, count);
1651 }
1652
1653 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1654         .attr   = { .ca_owner = THIS_MODULE,
1655                     .ca_name = "control",
1656                     .ca_mode = S_IWUSR },
1657         .show   = NULL,
1658         .store  = target_core_store_dev_control,
1659 };
1660
1661 static ssize_t target_core_show_dev_alias(void *p, char *page)
1662 {
1663         struct se_subsystem_dev *se_dev = p;
1664
1665         if (!(se_dev->su_dev_flags & SDF_USING_ALIAS))
1666                 return 0;
1667
1668         return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias);
1669 }
1670
1671 static ssize_t target_core_store_dev_alias(
1672         void *p,
1673         const char *page,
1674         size_t count)
1675 {
1676         struct se_subsystem_dev *se_dev = p;
1677         struct se_hba *hba = se_dev->se_dev_hba;
1678         ssize_t read_bytes;
1679
1680         if (count > (SE_DEV_ALIAS_LEN-1)) {
1681                 pr_err("alias count: %d exceeds"
1682                         " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1683                         SE_DEV_ALIAS_LEN-1);
1684                 return -EINVAL;
1685         }
1686
1687         read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN,
1688                         "%s", page);
1689         if (!read_bytes)
1690                 return -EINVAL;
1691         if (se_dev->se_dev_alias[read_bytes - 1] == '\n')
1692                 se_dev->se_dev_alias[read_bytes - 1] = '\0';
1693
1694         se_dev->su_dev_flags |= SDF_USING_ALIAS;
1695
1696         pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1697                 config_item_name(&hba->hba_group.cg_item),
1698                 config_item_name(&se_dev->se_dev_group.cg_item),
1699                 se_dev->se_dev_alias);
1700
1701         return read_bytes;
1702 }
1703
1704 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1705         .attr   = { .ca_owner = THIS_MODULE,
1706                     .ca_name = "alias",
1707                     .ca_mode =  S_IRUGO | S_IWUSR },
1708         .show   = target_core_show_dev_alias,
1709         .store  = target_core_store_dev_alias,
1710 };
1711
1712 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1713 {
1714         struct se_subsystem_dev *se_dev = p;
1715
1716         if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH))
1717                 return 0;
1718
1719         return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path);
1720 }
1721
1722 static ssize_t target_core_store_dev_udev_path(
1723         void *p,
1724         const char *page,
1725         size_t count)
1726 {
1727         struct se_subsystem_dev *se_dev = p;
1728         struct se_hba *hba = se_dev->se_dev_hba;
1729         ssize_t read_bytes;
1730
1731         if (count > (SE_UDEV_PATH_LEN-1)) {
1732                 pr_err("udev_path count: %d exceeds"
1733                         " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1734                         SE_UDEV_PATH_LEN-1);
1735                 return -EINVAL;
1736         }
1737
1738         read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN,
1739                         "%s", page);
1740         if (!read_bytes)
1741                 return -EINVAL;
1742         if (se_dev->se_dev_udev_path[read_bytes - 1] == '\n')
1743                 se_dev->se_dev_udev_path[read_bytes - 1] = '\0';
1744
1745         se_dev->su_dev_flags |= SDF_USING_UDEV_PATH;
1746
1747         pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1748                 config_item_name(&hba->hba_group.cg_item),
1749                 config_item_name(&se_dev->se_dev_group.cg_item),
1750                 se_dev->se_dev_udev_path);
1751
1752         return read_bytes;
1753 }
1754
1755 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1756         .attr   = { .ca_owner = THIS_MODULE,
1757                     .ca_name = "udev_path",
1758                     .ca_mode =  S_IRUGO | S_IWUSR },
1759         .show   = target_core_show_dev_udev_path,
1760         .store  = target_core_store_dev_udev_path,
1761 };
1762
1763 static ssize_t target_core_store_dev_enable(
1764         void *p,
1765         const char *page,
1766         size_t count)
1767 {
1768         struct se_subsystem_dev *se_dev = p;
1769         struct se_device *dev;
1770         struct se_hba *hba = se_dev->se_dev_hba;
1771         struct se_subsystem_api *t = hba->transport;
1772         char *ptr;
1773
1774         ptr = strstr(page, "1");
1775         if (!ptr) {
1776                 pr_err("For dev_enable ops, only valid value"
1777                                 " is \"1\"\n");
1778                 return -EINVAL;
1779         }
1780         if (se_dev->se_dev_ptr) {
1781                 pr_err("se_dev->se_dev_ptr already set for storage"
1782                                 " object\n");
1783                 return -EEXIST;
1784         }
1785
1786         if (t->check_configfs_dev_params(hba, se_dev) < 0)
1787                 return -EINVAL;
1788
1789         dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1790         if (IS_ERR(dev))
1791                 return PTR_ERR(dev);
1792         else if (!dev)
1793                 return -EINVAL;
1794
1795         se_dev->se_dev_ptr = dev;
1796         pr_debug("Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:"
1797                 " %p\n", se_dev->se_dev_ptr);
1798
1799         return count;
1800 }
1801
1802 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1803         .attr   = { .ca_owner = THIS_MODULE,
1804                     .ca_name = "enable",
1805                     .ca_mode = S_IWUSR },
1806         .show   = NULL,
1807         .store  = target_core_store_dev_enable,
1808 };
1809
1810 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1811 {
1812         struct se_device *dev;
1813         struct se_subsystem_dev *su_dev = p;
1814         struct config_item *lu_ci;
1815         struct t10_alua_lu_gp *lu_gp;
1816         struct t10_alua_lu_gp_member *lu_gp_mem;
1817         ssize_t len = 0;
1818
1819         dev = su_dev->se_dev_ptr;
1820         if (!dev)
1821                 return -ENODEV;
1822
1823         if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED)
1824                 return len;
1825
1826         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1827         if (!lu_gp_mem) {
1828                 pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
1829                                 " pointer\n");
1830                 return -EINVAL;
1831         }
1832
1833         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1834         lu_gp = lu_gp_mem->lu_gp;
1835         if (lu_gp) {
1836                 lu_ci = &lu_gp->lu_gp_group.cg_item;
1837                 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1838                         config_item_name(lu_ci), lu_gp->lu_gp_id);
1839         }
1840         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1841
1842         return len;
1843 }
1844
1845 static ssize_t target_core_store_alua_lu_gp(
1846         void *p,
1847         const char *page,
1848         size_t count)
1849 {
1850         struct se_device *dev;
1851         struct se_subsystem_dev *su_dev = p;
1852         struct se_hba *hba = su_dev->se_dev_hba;
1853         struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1854         struct t10_alua_lu_gp_member *lu_gp_mem;
1855         unsigned char buf[LU_GROUP_NAME_BUF];
1856         int move = 0;
1857
1858         dev = su_dev->se_dev_ptr;
1859         if (!dev)
1860                 return -ENODEV;
1861
1862         if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) {
1863                 pr_warn("SPC3_ALUA_EMULATED not enabled for %s/%s\n",
1864                         config_item_name(&hba->hba_group.cg_item),
1865                         config_item_name(&su_dev->se_dev_group.cg_item));
1866                 return -EINVAL;
1867         }
1868         if (count > LU_GROUP_NAME_BUF) {
1869                 pr_err("ALUA LU Group Alias too large!\n");
1870                 return -EINVAL;
1871         }
1872         memset(buf, 0, LU_GROUP_NAME_BUF);
1873         memcpy(buf, page, count);
1874         /*
1875          * Any ALUA logical unit alias besides "NULL" means we will be
1876          * making a new group association.
1877          */
1878         if (strcmp(strstrip(buf), "NULL")) {
1879                 /*
1880                  * core_alua_get_lu_gp_by_name() will increment reference to
1881                  * struct t10_alua_lu_gp.  This reference is released with
1882                  * core_alua_get_lu_gp_by_name below().
1883                  */
1884                 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1885                 if (!lu_gp_new)
1886                         return -ENODEV;
1887         }
1888         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1889         if (!lu_gp_mem) {
1890                 if (lu_gp_new)
1891                         core_alua_put_lu_gp_from_name(lu_gp_new);
1892                 pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
1893                                 " pointer\n");
1894                 return -EINVAL;
1895         }
1896
1897         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1898         lu_gp = lu_gp_mem->lu_gp;
1899         if (lu_gp) {
1900                 /*
1901                  * Clearing an existing lu_gp association, and replacing
1902                  * with NULL
1903                  */
1904                 if (!lu_gp_new) {
1905                         pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1906                                 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1907                                 " %hu\n",
1908                                 config_item_name(&hba->hba_group.cg_item),
1909                                 config_item_name(&su_dev->se_dev_group.cg_item),
1910                                 config_item_name(&lu_gp->lu_gp_group.cg_item),
1911                                 lu_gp->lu_gp_id);
1912
1913                         __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1914                         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1915
1916                         return count;
1917                 }
1918                 /*
1919                  * Removing existing association of lu_gp_mem with lu_gp
1920                  */
1921                 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1922                 move = 1;
1923         }
1924         /*
1925          * Associate lu_gp_mem with lu_gp_new.
1926          */
1927         __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1928         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1929
1930         pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1931                 " core/alua/lu_gps/%s, ID: %hu\n",
1932                 (move) ? "Moving" : "Adding",
1933                 config_item_name(&hba->hba_group.cg_item),
1934                 config_item_name(&su_dev->se_dev_group.cg_item),
1935                 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1936                 lu_gp_new->lu_gp_id);
1937
1938         core_alua_put_lu_gp_from_name(lu_gp_new);
1939         return count;
1940 }
1941
1942 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1943         .attr   = { .ca_owner = THIS_MODULE,
1944                     .ca_name = "alua_lu_gp",
1945                     .ca_mode = S_IRUGO | S_IWUSR },
1946         .show   = target_core_show_alua_lu_gp,
1947         .store  = target_core_store_alua_lu_gp,
1948 };
1949
1950 static struct configfs_attribute *lio_core_dev_attrs[] = {
1951         &target_core_attr_dev_info.attr,
1952         &target_core_attr_dev_control.attr,
1953         &target_core_attr_dev_alias.attr,
1954         &target_core_attr_dev_udev_path.attr,
1955         &target_core_attr_dev_enable.attr,
1956         &target_core_attr_dev_alua_lu_gp.attr,
1957         NULL,
1958 };
1959
1960 static void target_core_dev_release(struct config_item *item)
1961 {
1962         struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
1963                                 struct se_subsystem_dev, se_dev_group);
1964         struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
1965         struct se_subsystem_api *t = hba->transport;
1966         struct config_group *dev_cg = &se_dev->se_dev_group;
1967
1968         kfree(dev_cg->default_groups);
1969         /*
1970          * This pointer will set when the storage is enabled with:
1971          *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable`
1972          */
1973         if (se_dev->se_dev_ptr) {
1974                 pr_debug("Target_Core_ConfigFS: Calling se_free_"
1975                         "virtual_device() for se_dev_ptr: %p\n",
1976                         se_dev->se_dev_ptr);
1977
1978                 se_free_virtual_device(se_dev->se_dev_ptr, hba);
1979         } else {
1980                 /*
1981                  * Release struct se_subsystem_dev->se_dev_su_ptr..
1982                  */
1983                 pr_debug("Target_Core_ConfigFS: Calling t->free_"
1984                         "device() for se_dev_su_ptr: %p\n",
1985                         se_dev->se_dev_su_ptr);
1986
1987                 t->free_device(se_dev->se_dev_su_ptr);
1988         }
1989
1990         pr_debug("Target_Core_ConfigFS: Deallocating se_subsystem"
1991                         "_dev_t: %p\n", se_dev);
1992         kfree(se_dev);
1993 }
1994
1995 static ssize_t target_core_dev_show(struct config_item *item,
1996                                      struct configfs_attribute *attr,
1997                                      char *page)
1998 {
1999         struct se_subsystem_dev *se_dev = container_of(
2000                         to_config_group(item), struct se_subsystem_dev,
2001                         se_dev_group);
2002         struct target_core_configfs_attribute *tc_attr = container_of(
2003                         attr, struct target_core_configfs_attribute, attr);
2004
2005         if (!tc_attr->show)
2006                 return -EINVAL;
2007
2008         return tc_attr->show(se_dev, page);
2009 }
2010
2011 static ssize_t target_core_dev_store(struct config_item *item,
2012                                       struct configfs_attribute *attr,
2013                                       const char *page, size_t count)
2014 {
2015         struct se_subsystem_dev *se_dev = container_of(
2016                         to_config_group(item), struct se_subsystem_dev,
2017                         se_dev_group);
2018         struct target_core_configfs_attribute *tc_attr = container_of(
2019                         attr, struct target_core_configfs_attribute, attr);
2020
2021         if (!tc_attr->store)
2022                 return -EINVAL;
2023
2024         return tc_attr->store(se_dev, page, count);
2025 }
2026
2027 static struct configfs_item_operations target_core_dev_item_ops = {
2028         .release                = target_core_dev_release,
2029         .show_attribute         = target_core_dev_show,
2030         .store_attribute        = target_core_dev_store,
2031 };
2032
2033 static struct config_item_type target_core_dev_cit = {
2034         .ct_item_ops            = &target_core_dev_item_ops,
2035         .ct_attrs               = lio_core_dev_attrs,
2036         .ct_owner               = THIS_MODULE,
2037 };
2038
2039 /* End functions for struct config_item_type target_core_dev_cit */
2040
2041 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2042
2043 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2044 #define SE_DEV_ALUA_LU_ATTR(_name, _mode)                               \
2045 static struct target_core_alua_lu_gp_attribute                          \
2046                         target_core_alua_lu_gp_##_name =                \
2047         __CONFIGFS_EATTR(_name, _mode,                                  \
2048         target_core_alua_lu_gp_show_attr_##_name,                       \
2049         target_core_alua_lu_gp_store_attr_##_name);
2050
2051 #define SE_DEV_ALUA_LU_ATTR_RO(_name)                                   \
2052 static struct target_core_alua_lu_gp_attribute                          \
2053                         target_core_alua_lu_gp_##_name =                \
2054         __CONFIGFS_EATTR_RO(_name,                                      \
2055         target_core_alua_lu_gp_show_attr_##_name);
2056
2057 /*
2058  * lu_gp_id
2059  */
2060 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2061         struct t10_alua_lu_gp *lu_gp,
2062         char *page)
2063 {
2064         if (!lu_gp->lu_gp_valid_id)
2065                 return 0;
2066
2067         return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2068 }
2069
2070 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2071         struct t10_alua_lu_gp *lu_gp,
2072         const char *page,
2073         size_t count)
2074 {
2075         struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2076         unsigned long lu_gp_id;
2077         int ret;
2078
2079         ret = strict_strtoul(page, 0, &lu_gp_id);
2080         if (ret < 0) {
2081                 pr_err("strict_strtoul() returned %d for"
2082                         " lu_gp_id\n", ret);
2083                 return -EINVAL;
2084         }
2085         if (lu_gp_id > 0x0000ffff) {
2086                 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2087                         " 0x0000ffff\n", lu_gp_id);
2088                 return -EINVAL;
2089         }
2090
2091         ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2092         if (ret < 0)
2093                 return -EINVAL;
2094
2095         pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2096                 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2097                 config_item_name(&alua_lu_gp_cg->cg_item),
2098                 lu_gp->lu_gp_id);
2099
2100         return count;
2101 }
2102
2103 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2104
2105 /*
2106  * members
2107  */
2108 static ssize_t target_core_alua_lu_gp_show_attr_members(
2109         struct t10_alua_lu_gp *lu_gp,
2110         char *page)
2111 {
2112         struct se_device *dev;
2113         struct se_hba *hba;
2114         struct se_subsystem_dev *su_dev;
2115         struct t10_alua_lu_gp_member *lu_gp_mem;
2116         ssize_t len = 0, cur_len;
2117         unsigned char buf[LU_GROUP_NAME_BUF];
2118
2119         memset(buf, 0, LU_GROUP_NAME_BUF);
2120
2121         spin_lock(&lu_gp->lu_gp_lock);
2122         list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2123                 dev = lu_gp_mem->lu_gp_mem_dev;
2124                 su_dev = dev->se_sub_dev;
2125                 hba = su_dev->se_dev_hba;
2126
2127                 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2128                         config_item_name(&hba->hba_group.cg_item),
2129                         config_item_name(&su_dev->se_dev_group.cg_item));
2130                 cur_len++; /* Extra byte for NULL terminator */
2131
2132                 if ((cur_len + len) > PAGE_SIZE) {
2133                         pr_warn("Ran out of lu_gp_show_attr"
2134                                 "_members buffer\n");
2135                         break;
2136                 }
2137                 memcpy(page+len, buf, cur_len);
2138                 len += cur_len;
2139         }
2140         spin_unlock(&lu_gp->lu_gp_lock);
2141
2142         return len;
2143 }
2144
2145 SE_DEV_ALUA_LU_ATTR_RO(members);
2146
2147 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2148
2149 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2150         &target_core_alua_lu_gp_lu_gp_id.attr,
2151         &target_core_alua_lu_gp_members.attr,
2152         NULL,
2153 };
2154
2155 static void target_core_alua_lu_gp_release(struct config_item *item)
2156 {
2157         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2158                         struct t10_alua_lu_gp, lu_gp_group);
2159
2160         core_alua_free_lu_gp(lu_gp);
2161 }
2162
2163 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2164         .release                = target_core_alua_lu_gp_release,
2165         .show_attribute         = target_core_alua_lu_gp_attr_show,
2166         .store_attribute        = target_core_alua_lu_gp_attr_store,
2167 };
2168
2169 static struct config_item_type target_core_alua_lu_gp_cit = {
2170         .ct_item_ops            = &target_core_alua_lu_gp_ops,
2171         .ct_attrs               = target_core_alua_lu_gp_attrs,
2172         .ct_owner               = THIS_MODULE,
2173 };
2174
2175 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2176
2177 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2178
2179 static struct config_group *target_core_alua_create_lu_gp(
2180         struct config_group *group,
2181         const char *name)
2182 {
2183         struct t10_alua_lu_gp *lu_gp;
2184         struct config_group *alua_lu_gp_cg = NULL;
2185         struct config_item *alua_lu_gp_ci = NULL;
2186
2187         lu_gp = core_alua_allocate_lu_gp(name, 0);
2188         if (IS_ERR(lu_gp))
2189                 return NULL;
2190
2191         alua_lu_gp_cg = &lu_gp->lu_gp_group;
2192         alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2193
2194         config_group_init_type_name(alua_lu_gp_cg, name,
2195                         &target_core_alua_lu_gp_cit);
2196
2197         pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2198                 " Group: core/alua/lu_gps/%s\n",
2199                 config_item_name(alua_lu_gp_ci));
2200
2201         return alua_lu_gp_cg;
2202
2203 }
2204
2205 static void target_core_alua_drop_lu_gp(
2206         struct config_group *group,
2207         struct config_item *item)
2208 {
2209         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2210                         struct t10_alua_lu_gp, lu_gp_group);
2211
2212         pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2213                 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2214                 config_item_name(item), lu_gp->lu_gp_id);
2215         /*
2216          * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2217          * -> target_core_alua_lu_gp_release()
2218          */
2219         config_item_put(item);
2220 }
2221
2222 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2223         .make_group             = &target_core_alua_create_lu_gp,
2224         .drop_item              = &target_core_alua_drop_lu_gp,
2225 };
2226
2227 static struct config_item_type target_core_alua_lu_gps_cit = {
2228         .ct_item_ops            = NULL,
2229         .ct_group_ops           = &target_core_alua_lu_gps_group_ops,
2230         .ct_owner               = THIS_MODULE,
2231 };
2232
2233 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2234
2235 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2236
2237 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2238 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode)                            \
2239 static struct target_core_alua_tg_pt_gp_attribute                       \
2240                         target_core_alua_tg_pt_gp_##_name =             \
2241         __CONFIGFS_EATTR(_name, _mode,                                  \
2242         target_core_alua_tg_pt_gp_show_attr_##_name,                    \
2243         target_core_alua_tg_pt_gp_store_attr_##_name);
2244
2245 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name)                                \
2246 static struct target_core_alua_tg_pt_gp_attribute                       \
2247                         target_core_alua_tg_pt_gp_##_name =             \
2248         __CONFIGFS_EATTR_RO(_name,                                      \
2249         target_core_alua_tg_pt_gp_show_attr_##_name);
2250
2251 /*
2252  * alua_access_state
2253  */
2254 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2255         struct t10_alua_tg_pt_gp *tg_pt_gp,
2256         char *page)
2257 {
2258         return sprintf(page, "%d\n",
2259                 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2260 }
2261
2262 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2263         struct t10_alua_tg_pt_gp *tg_pt_gp,
2264         const char *page,
2265         size_t count)
2266 {
2267         struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
2268         unsigned long tmp;
2269         int new_state, ret;
2270
2271         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2272                 pr_err("Unable to do implict ALUA on non valid"
2273                         " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2274                 return -EINVAL;
2275         }
2276
2277         ret = strict_strtoul(page, 0, &tmp);
2278         if (ret < 0) {
2279                 pr_err("Unable to extract new ALUA access state from"
2280                                 " %s\n", page);
2281                 return -EINVAL;
2282         }
2283         new_state = (int)tmp;
2284
2285         if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2286                 pr_err("Unable to process implict configfs ALUA"
2287                         " transition while TPGS_IMPLICT_ALUA is disabled\n");
2288                 return -EINVAL;
2289         }
2290
2291         ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr,
2292                                         NULL, NULL, new_state, 0);
2293         return (!ret) ? count : -EINVAL;
2294 }
2295
2296 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2297
2298 /*
2299  * alua_access_status
2300  */
2301 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2302         struct t10_alua_tg_pt_gp *tg_pt_gp,
2303         char *page)
2304 {
2305         return sprintf(page, "%s\n",
2306                 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2307 }
2308
2309 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2310         struct t10_alua_tg_pt_gp *tg_pt_gp,
2311         const char *page,
2312         size_t count)
2313 {
2314         unsigned long tmp;
2315         int new_status, ret;
2316
2317         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2318                 pr_err("Unable to do set ALUA access status on non"
2319                         " valid tg_pt_gp ID: %hu\n",
2320                         tg_pt_gp->tg_pt_gp_valid_id);
2321                 return -EINVAL;
2322         }
2323
2324         ret = strict_strtoul(page, 0, &tmp);
2325         if (ret < 0) {
2326                 pr_err("Unable to extract new ALUA access status"
2327                                 " from %s\n", page);
2328                 return -EINVAL;
2329         }
2330         new_status = (int)tmp;
2331
2332         if ((new_status != ALUA_STATUS_NONE) &&
2333             (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2334             (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2335                 pr_err("Illegal ALUA access status: 0x%02x\n",
2336                                 new_status);
2337                 return -EINVAL;
2338         }
2339
2340         tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2341         return count;
2342 }
2343
2344 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2345
2346 /*
2347  * alua_access_type
2348  */
2349 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2350         struct t10_alua_tg_pt_gp *tg_pt_gp,
2351         char *page)
2352 {
2353         return core_alua_show_access_type(tg_pt_gp, page);
2354 }
2355
2356 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2357         struct t10_alua_tg_pt_gp *tg_pt_gp,
2358         const char *page,
2359         size_t count)
2360 {
2361         return core_alua_store_access_type(tg_pt_gp, page, count);
2362 }
2363
2364 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2365
2366 /*
2367  * alua_write_metadata
2368  */
2369 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2370         struct t10_alua_tg_pt_gp *tg_pt_gp,
2371         char *page)
2372 {
2373         return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2374 }
2375
2376 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2377         struct t10_alua_tg_pt_gp *tg_pt_gp,
2378         const char *page,
2379         size_t count)
2380 {
2381         unsigned long tmp;
2382         int ret;
2383
2384         ret = strict_strtoul(page, 0, &tmp);
2385         if (ret < 0) {
2386                 pr_err("Unable to extract alua_write_metadata\n");
2387                 return -EINVAL;
2388         }
2389
2390         if ((tmp != 0) && (tmp != 1)) {
2391                 pr_err("Illegal value for alua_write_metadata:"
2392                         " %lu\n", tmp);
2393                 return -EINVAL;
2394         }
2395         tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2396
2397         return count;
2398 }
2399
2400 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2401
2402
2403
2404 /*
2405  * nonop_delay_msecs
2406  */
2407 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2408         struct t10_alua_tg_pt_gp *tg_pt_gp,
2409         char *page)
2410 {
2411         return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2412
2413 }
2414
2415 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2416         struct t10_alua_tg_pt_gp *tg_pt_gp,
2417         const char *page,
2418         size_t count)
2419 {
2420         return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2421 }
2422
2423 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2424
2425 /*
2426  * trans_delay_msecs
2427  */
2428 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2429         struct t10_alua_tg_pt_gp *tg_pt_gp,
2430         char *page)
2431 {
2432         return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2433 }
2434
2435 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2436         struct t10_alua_tg_pt_gp *tg_pt_gp,
2437         const char *page,
2438         size_t count)
2439 {
2440         return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2441 }
2442
2443 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2444
2445 /*
2446  * implict_trans_secs
2447  */
2448 static ssize_t target_core_alua_tg_pt_gp_show_attr_implict_trans_secs(
2449         struct t10_alua_tg_pt_gp *tg_pt_gp,
2450         char *page)
2451 {
2452         return core_alua_show_implict_trans_secs(tg_pt_gp, page);
2453 }
2454
2455 static ssize_t target_core_alua_tg_pt_gp_store_attr_implict_trans_secs(
2456         struct t10_alua_tg_pt_gp *tg_pt_gp,
2457         const char *page,
2458         size_t count)
2459 {
2460         return core_alua_store_implict_trans_secs(tg_pt_gp, page, count);
2461 }
2462
2463 SE_DEV_ALUA_TG_PT_ATTR(implict_trans_secs, S_IRUGO | S_IWUSR);
2464
2465 /*
2466  * preferred
2467  */
2468
2469 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2470         struct t10_alua_tg_pt_gp *tg_pt_gp,
2471         char *page)
2472 {
2473         return core_alua_show_preferred_bit(tg_pt_gp, page);
2474 }
2475
2476 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2477         struct t10_alua_tg_pt_gp *tg_pt_gp,
2478         const char *page,
2479         size_t count)
2480 {
2481         return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2482 }
2483
2484 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2485
2486 /*
2487  * tg_pt_gp_id
2488  */
2489 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2490         struct t10_alua_tg_pt_gp *tg_pt_gp,
2491         char *page)
2492 {
2493         if (!tg_pt_gp->tg_pt_gp_valid_id)
2494                 return 0;
2495
2496         return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2497 }
2498
2499 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2500         struct t10_alua_tg_pt_gp *tg_pt_gp,
2501         const char *page,
2502         size_t count)
2503 {
2504         struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2505         unsigned long tg_pt_gp_id;
2506         int ret;
2507
2508         ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2509         if (ret < 0) {
2510                 pr_err("strict_strtoul() returned %d for"
2511                         " tg_pt_gp_id\n", ret);
2512                 return -EINVAL;
2513         }
2514         if (tg_pt_gp_id > 0x0000ffff) {
2515                 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2516                         " 0x0000ffff\n", tg_pt_gp_id);
2517                 return -EINVAL;
2518         }
2519
2520         ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2521         if (ret < 0)
2522                 return -EINVAL;
2523
2524         pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2525                 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2526                 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2527                 tg_pt_gp->tg_pt_gp_id);
2528
2529         return count;
2530 }
2531
2532 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2533
2534 /*
2535  * members
2536  */
2537 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2538         struct t10_alua_tg_pt_gp *tg_pt_gp,
2539         char *page)
2540 {
2541         struct se_port *port;
2542         struct se_portal_group *tpg;
2543         struct se_lun *lun;
2544         struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2545         ssize_t len = 0, cur_len;
2546         unsigned char buf[TG_PT_GROUP_NAME_BUF];
2547
2548         memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2549
2550         spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2551         list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2552                         tg_pt_gp_mem_list) {
2553                 port = tg_pt_gp_mem->tg_pt;
2554                 tpg = port->sep_tpg;
2555                 lun = port->sep_lun;
2556
2557                 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2558                         "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2559                         tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2560                         tpg->se_tpg_tfo->tpg_get_tag(tpg),
2561                         config_item_name(&lun->lun_group.cg_item));
2562                 cur_len++; /* Extra byte for NULL terminator */
2563
2564                 if ((cur_len + len) > PAGE_SIZE) {
2565                         pr_warn("Ran out of lu_gp_show_attr"
2566                                 "_members buffer\n");
2567                         break;
2568                 }
2569                 memcpy(page+len, buf, cur_len);
2570                 len += cur_len;
2571         }
2572         spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2573
2574         return len;
2575 }
2576
2577 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2578
2579 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2580                         tg_pt_gp_group);
2581
2582 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2583         &target_core_alua_tg_pt_gp_alua_access_state.attr,
2584         &target_core_alua_tg_pt_gp_alua_access_status.attr,
2585         &target_core_alua_tg_pt_gp_alua_access_type.attr,
2586         &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2587         &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2588         &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2589         &target_core_alua_tg_pt_gp_implict_trans_secs.attr,
2590         &target_core_alua_tg_pt_gp_preferred.attr,
2591         &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2592         &target_core_alua_tg_pt_gp_members.attr,
2593         NULL,
2594 };
2595
2596 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2597 {
2598         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2599                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2600
2601         core_alua_free_tg_pt_gp(tg_pt_gp);
2602 }
2603
2604 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2605         .release                = target_core_alua_tg_pt_gp_release,
2606         .show_attribute         = target_core_alua_tg_pt_gp_attr_show,
2607         .store_attribute        = target_core_alua_tg_pt_gp_attr_store,
2608 };
2609
2610 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2611         .ct_item_ops            = &target_core_alua_tg_pt_gp_ops,
2612         .ct_attrs               = target_core_alua_tg_pt_gp_attrs,
2613         .ct_owner               = THIS_MODULE,
2614 };
2615
2616 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2617
2618 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2619
2620 static struct config_group *target_core_alua_create_tg_pt_gp(
2621         struct config_group *group,
2622         const char *name)
2623 {
2624         struct t10_alua *alua = container_of(group, struct t10_alua,
2625                                         alua_tg_pt_gps_group);
2626         struct t10_alua_tg_pt_gp *tg_pt_gp;
2627         struct se_subsystem_dev *su_dev = alua->t10_sub_dev;
2628         struct config_group *alua_tg_pt_gp_cg = NULL;
2629         struct config_item *alua_tg_pt_gp_ci = NULL;
2630
2631         tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0);
2632         if (!tg_pt_gp)
2633                 return NULL;
2634
2635         alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2636         alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2637
2638         config_group_init_type_name(alua_tg_pt_gp_cg, name,
2639                         &target_core_alua_tg_pt_gp_cit);
2640
2641         pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2642                 " Group: alua/tg_pt_gps/%s\n",
2643                 config_item_name(alua_tg_pt_gp_ci));
2644
2645         return alua_tg_pt_gp_cg;
2646 }
2647
2648 static void target_core_alua_drop_tg_pt_gp(
2649         struct config_group *group,
2650         struct config_item *item)
2651 {
2652         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2653                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2654
2655         pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2656                 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2657                 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2658         /*
2659          * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2660          * -> target_core_alua_tg_pt_gp_release().
2661          */
2662         config_item_put(item);
2663 }
2664
2665 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2666         .make_group             = &target_core_alua_create_tg_pt_gp,
2667         .drop_item              = &target_core_alua_drop_tg_pt_gp,
2668 };
2669
2670 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2671         .ct_group_ops           = &target_core_alua_tg_pt_gps_group_ops,
2672         .ct_owner               = THIS_MODULE,
2673 };
2674
2675 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2676
2677 /* Start functions for struct config_item_type target_core_alua_cit */
2678
2679 /*
2680  * target_core_alua_cit is a ConfigFS group that lives under
2681  * /sys/kernel/config/target/core/alua.  There are default groups
2682  * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2683  * target_core_alua_cit in target_core_init_configfs() below.
2684  */
2685 static struct config_item_type target_core_alua_cit = {
2686         .ct_item_ops            = NULL,
2687         .ct_attrs               = NULL,
2688         .ct_owner               = THIS_MODULE,
2689 };
2690
2691 /* End functions for struct config_item_type target_core_alua_cit */
2692
2693 /* Start functions for struct config_item_type target_core_stat_cit */
2694
2695 static struct config_group *target_core_stat_mkdir(
2696         struct config_group *group,
2697         const char *name)
2698 {
2699         return ERR_PTR(-ENOSYS);
2700 }
2701
2702 static void target_core_stat_rmdir(
2703         struct config_group *group,
2704         struct config_item *item)
2705 {
2706         return;
2707 }
2708
2709 static struct configfs_group_operations target_core_stat_group_ops = {
2710         .make_group             = &target_core_stat_mkdir,
2711         .drop_item              = &target_core_stat_rmdir,
2712 };
2713
2714 static struct config_item_type target_core_stat_cit = {
2715         .ct_group_ops           = &target_core_stat_group_ops,
2716         .ct_owner               = THIS_MODULE,
2717 };
2718
2719 /* End functions for struct config_item_type target_core_stat_cit */
2720
2721 /* Start functions for struct config_item_type target_core_hba_cit */
2722
2723 static struct config_group *target_core_make_subdev(
2724         struct config_group *group,
2725         const char *name)
2726 {
2727         struct t10_alua_tg_pt_gp *tg_pt_gp;
2728         struct se_subsystem_dev *se_dev;
2729         struct se_subsystem_api *t;
2730         struct config_item *hba_ci = &group->cg_item;
2731         struct se_hba *hba = item_to_hba(hba_ci);
2732         struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2733         struct config_group *dev_stat_grp = NULL;
2734         int errno = -ENOMEM, ret;
2735
2736         ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2737         if (ret)
2738                 return ERR_PTR(ret);
2739         /*
2740          * Locate the struct se_subsystem_api from parent's struct se_hba.
2741          */
2742         t = hba->transport;
2743
2744         se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
2745         if (!se_dev) {
2746                 pr_err("Unable to allocate memory for"
2747                                 " struct se_subsystem_dev\n");
2748                 goto unlock;
2749         }
2750         INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
2751         spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
2752         INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
2753         INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
2754         spin_lock_init(&se_dev->t10_pr.registration_lock);
2755         spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
2756         INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
2757         spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
2758         spin_lock_init(&se_dev->se_dev_lock);
2759         se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
2760         se_dev->t10_wwn.t10_sub_dev = se_dev;
2761         se_dev->t10_alua.t10_sub_dev = se_dev;
2762         se_dev->se_dev_attrib.da_sub_dev = se_dev;
2763
2764         se_dev->se_dev_hba = hba;
2765         dev_cg = &se_dev->se_dev_group;
2766
2767         dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 7,
2768                         GFP_KERNEL);
2769         if (!dev_cg->default_groups)
2770                 goto out;
2771         /*
2772          * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr
2773          * for ->allocate_virtdevice()
2774          *
2775          * se_dev->se_dev_ptr will be set after ->create_virtdev()
2776          * has been called successfully in the next level up in the
2777          * configfs tree for device object's struct config_group.
2778          */
2779         se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name);
2780         if (!se_dev->se_dev_su_ptr) {
2781                 pr_err("Unable to locate subsystem dependent pointer"
2782                         " from allocate_virtdevice()\n");
2783                 goto out;
2784         }
2785
2786         config_group_init_type_name(&se_dev->se_dev_group, name,
2787                         &target_core_dev_cit);
2788         config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib",
2789                         &target_core_dev_attrib_cit);
2790         config_group_init_type_name(&se_dev->se_dev_pr_group, "pr",
2791                         &target_core_dev_pr_cit);
2792         config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn",
2793                         &target_core_dev_wwn_cit);
2794         config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group,
2795                         "alua", &target_core_alua_tg_pt_gps_cit);
2796         config_group_init_type_name(&se_dev->dev_stat_grps.stat_group,
2797                         "statistics", &target_core_stat_cit);
2798
2799         dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group;
2800         dev_cg->default_groups[1] = &se_dev->se_dev_pr_group;
2801         dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group;
2802         dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group;
2803         dev_cg->default_groups[4] = &se_dev->dev_stat_grps.stat_group;
2804         dev_cg->default_groups[5] = NULL;
2805         /*
2806          * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2807          */
2808         tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1);
2809         if (!tg_pt_gp)
2810                 goto out;
2811
2812         tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
2813         tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
2814                                 GFP_KERNEL);
2815         if (!tg_pt_gp_cg->default_groups) {
2816                 pr_err("Unable to allocate tg_pt_gp_cg->"
2817                                 "default_groups\n");
2818                 goto out;
2819         }
2820
2821         config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2822                         "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2823         tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2824         tg_pt_gp_cg->default_groups[1] = NULL;
2825         se_dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2826         /*
2827          * Add core/$HBA/$DEV/statistics/ default groups
2828          */
2829         dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
2830         dev_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 4,
2831                                 GFP_KERNEL);
2832         if (!dev_stat_grp->default_groups) {
2833                 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2834                 goto out;
2835         }
2836         target_stat_setup_dev_default_groups(se_dev);
2837
2838         pr_debug("Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
2839                 " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr);
2840
2841         mutex_unlock(&hba->hba_access_mutex);
2842         return &se_dev->se_dev_group;
2843 out:
2844         if (se_dev->t10_alua.default_tg_pt_gp) {
2845                 core_alua_free_tg_pt_gp(se_dev->t10_alua.default_tg_pt_gp);
2846                 se_dev->t10_alua.default_tg_pt_gp = NULL;
2847         }
2848         if (dev_stat_grp)
2849                 kfree(dev_stat_grp->default_groups);
2850         if (tg_pt_gp_cg)
2851                 kfree(tg_pt_gp_cg->default_groups);
2852         if (dev_cg)
2853                 kfree(dev_cg->default_groups);
2854         if (se_dev->se_dev_su_ptr)
2855                 t->free_device(se_dev->se_dev_su_ptr);
2856         kfree(se_dev);
2857 unlock:
2858         mutex_unlock(&hba->hba_access_mutex);
2859         return ERR_PTR(errno);
2860 }
2861
2862 static void target_core_drop_subdev(
2863         struct config_group *group,
2864         struct config_item *item)
2865 {
2866         struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
2867                                 struct se_subsystem_dev, se_dev_group);
2868         struct se_hba *hba;
2869         struct config_item *df_item;
2870         struct config_group *dev_cg, *tg_pt_gp_cg, *dev_stat_grp;
2871         int i;
2872
2873         hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
2874
2875         mutex_lock(&hba->hba_access_mutex);
2876
2877         dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
2878         for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2879                 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2880                 dev_stat_grp->default_groups[i] = NULL;
2881                 config_item_put(df_item);
2882         }
2883         kfree(dev_stat_grp->default_groups);
2884
2885         tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
2886         for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2887                 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2888                 tg_pt_gp_cg->default_groups[i] = NULL;
2889                 config_item_put(df_item);
2890         }
2891         kfree(tg_pt_gp_cg->default_groups);
2892         /*
2893          * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2894          * directly from target_core_alua_tg_pt_gp_release().
2895          */
2896         se_dev->t10_alua.default_tg_pt_gp = NULL;
2897
2898         dev_cg = &se_dev->se_dev_group;
2899         for (i = 0; dev_cg->default_groups[i]; i++) {
2900                 df_item = &dev_cg->default_groups[i]->cg_item;
2901                 dev_cg->default_groups[i] = NULL;
2902                 config_item_put(df_item);
2903         }
2904         /*
2905          * The releasing of se_dev and associated se_dev->se_dev_ptr is done
2906          * from target_core_dev_item_ops->release() ->target_core_dev_release().
2907          */
2908         config_item_put(item);
2909         mutex_unlock(&hba->hba_access_mutex);
2910 }
2911
2912 static struct configfs_group_operations target_core_hba_group_ops = {
2913         .make_group             = target_core_make_subdev,
2914         .drop_item              = target_core_drop_subdev,
2915 };
2916
2917 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2918 #define SE_HBA_ATTR(_name, _mode)                               \
2919 static struct target_core_hba_attribute                         \
2920                 target_core_hba_##_name =                       \
2921                 __CONFIGFS_EATTR(_name, _mode,                  \
2922                 target_core_hba_show_attr_##_name,              \
2923                 target_core_hba_store_attr_##_name);
2924
2925 #define SE_HBA_ATTR_RO(_name)                                   \
2926 static struct target_core_hba_attribute                         \
2927                 target_core_hba_##_name =                       \
2928                 __CONFIGFS_EATTR_RO(_name,                      \
2929                 target_core_hba_show_attr_##_name);
2930
2931 static ssize_t target_core_hba_show_attr_hba_info(
2932         struct se_hba *hba,
2933         char *page)
2934 {
2935         return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2936                         hba->hba_id, hba->transport->name,
2937                         TARGET_CORE_CONFIGFS_VERSION);
2938 }
2939
2940 SE_HBA_ATTR_RO(hba_info);
2941
2942 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2943                                 char *page)
2944 {
2945         int hba_mode = 0;
2946
2947         if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2948                 hba_mode = 1;
2949
2950         return sprintf(page, "%d\n", hba_mode);
2951 }
2952
2953 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2954                                 const char *page, size_t count)
2955 {
2956         struct se_subsystem_api *transport = hba->transport;
2957         unsigned long mode_flag;
2958         int ret;
2959
2960         if (transport->pmode_enable_hba == NULL)
2961                 return -EINVAL;
2962
2963         ret = strict_strtoul(page, 0, &mode_flag);
2964         if (ret < 0) {
2965                 pr_err("Unable to extract hba mode flag: %d\n", ret);
2966                 return -EINVAL;
2967         }
2968
2969         spin_lock(&hba->device_lock);
2970         if (!list_empty(&hba->hba_dev_list)) {
2971                 pr_err("Unable to set hba_mode with active devices\n");
2972                 spin_unlock(&hba->device_lock);
2973                 return -EINVAL;
2974         }
2975         spin_unlock(&hba->device_lock);
2976
2977         ret = transport->pmode_enable_hba(hba, mode_flag);
2978         if (ret < 0)
2979                 return -EINVAL;
2980         if (ret > 0)
2981                 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2982         else if (ret == 0)
2983                 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2984
2985         return count;
2986 }
2987
2988 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2989
2990 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2991
2992 static void target_core_hba_release(struct config_item *item)
2993 {
2994         struct se_hba *hba = container_of(to_config_group(item),
2995                                 struct se_hba, hba_group);
2996         core_delete_hba(hba);
2997 }
2998
2999 static struct configfs_attribute *target_core_hba_attrs[] = {
3000         &target_core_hba_hba_info.attr,
3001         &target_core_hba_hba_mode.attr,
3002         NULL,
3003 };
3004
3005 static struct configfs_item_operations target_core_hba_item_ops = {
3006         .release                = target_core_hba_release,
3007         .show_attribute         = target_core_hba_attr_show,
3008         .store_attribute        = target_core_hba_attr_store,
3009 };
3010
3011 static struct config_item_type target_core_hba_cit = {
3012         .ct_item_ops            = &target_core_hba_item_ops,
3013         .ct_group_ops           = &target_core_hba_group_ops,
3014         .ct_attrs               = target_core_hba_attrs,
3015         .ct_owner               = THIS_MODULE,
3016 };
3017
3018 static struct config_group *target_core_call_addhbatotarget(
3019         struct config_group *group,
3020         const char *name)
3021 {
3022         char *se_plugin_str, *str, *str2;
3023         struct se_hba *hba;
3024         char buf[TARGET_CORE_NAME_MAX_LEN];
3025         unsigned long plugin_dep_id = 0;
3026         int ret;
3027
3028         memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3029         if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3030                 pr_err("Passed *name strlen(): %d exceeds"
3031                         " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3032                         TARGET_CORE_NAME_MAX_LEN);
3033                 return ERR_PTR(-ENAMETOOLONG);
3034         }
3035         snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3036
3037         str = strstr(buf, "_");
3038         if (!str) {
3039                 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3040                 return ERR_PTR(-EINVAL);
3041         }
3042         se_plugin_str = buf;
3043         /*
3044          * Special case for subsystem plugins that have "_" in their names.
3045          * Namely rd_direct and rd_mcp..
3046          */
3047         str2 = strstr(str+1, "_");
3048         if (str2) {
3049                 *str2 = '\0'; /* Terminate for *se_plugin_str */
3050                 str2++; /* Skip to start of plugin dependent ID */
3051                 str = str2;
3052         } else {
3053                 *str = '\0'; /* Terminate for *se_plugin_str */
3054                 str++; /* Skip to start of plugin dependent ID */
3055         }
3056
3057         ret = strict_strtoul(str, 0, &plugin_dep_id);
3058         if (ret < 0) {
3059                 pr_err("strict_strtoul() returned %d for"
3060                                 " plugin_dep_id\n", ret);
3061                 return ERR_PTR(-EINVAL);
3062         }
3063         /*
3064          * Load up TCM subsystem plugins if they have not already been loaded.
3065          */
3066         transport_subsystem_check_init();
3067
3068         hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3069         if (IS_ERR(hba))
3070                 return ERR_CAST(hba);
3071
3072         config_group_init_type_name(&hba->hba_group, name,
3073                         &target_core_hba_cit);
3074
3075         return &hba->hba_group;
3076 }
3077
3078 static void target_core_call_delhbafromtarget(
3079         struct config_group *group,
3080         struct config_item *item)
3081 {
3082         /*
3083          * core_delete_hba() is called from target_core_hba_item_ops->release()
3084          * -> target_core_hba_release()
3085          */
3086         config_item_put(item);
3087 }
3088
3089 static struct configfs_group_operations target_core_group_ops = {
3090         .make_group     = target_core_call_addhbatotarget,
3091         .drop_item      = target_core_call_delhbafromtarget,
3092 };
3093
3094 static struct config_item_type target_core_cit = {
3095         .ct_item_ops    = NULL,
3096         .ct_group_ops   = &target_core_group_ops,
3097         .ct_attrs       = NULL,
3098         .ct_owner       = THIS_MODULE,
3099 };
3100
3101 /* Stop functions for struct config_item_type target_core_hba_cit */
3102
3103 static int __init target_core_init_configfs(void)
3104 {
3105         struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3106         struct config_group *lu_gp_cg = NULL;
3107         struct configfs_subsystem *subsys;
3108         struct t10_alua_lu_gp *lu_gp;
3109         int ret;
3110
3111         pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3112                 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3113                 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3114
3115         subsys = target_core_subsystem[0];
3116         config_group_init(&subsys->su_group);
3117         mutex_init(&subsys->su_mutex);
3118
3119         ret = init_se_kmem_caches();
3120         if (ret < 0)
3121                 return ret;
3122         /*
3123          * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3124          * and ALUA Logical Unit Group and Target Port Group infrastructure.
3125          */
3126         target_cg = &subsys->su_group;
3127         target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3128                                 GFP_KERNEL);
3129         if (!target_cg->default_groups) {
3130                 pr_err("Unable to allocate target_cg->default_groups\n");
3131                 goto out_global;
3132         }
3133
3134         config_group_init_type_name(&target_core_hbagroup,
3135                         "core", &target_core_cit);
3136         target_cg->default_groups[0] = &target_core_hbagroup;
3137         target_cg->default_groups[1] = NULL;
3138         /*
3139          * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3140          */
3141         hba_cg = &target_core_hbagroup;
3142         hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3143                                 GFP_KERNEL);
3144         if (!hba_cg->default_groups) {
3145                 pr_err("Unable to allocate hba_cg->default_groups\n");
3146                 goto out_global;
3147         }
3148         config_group_init_type_name(&alua_group,
3149                         "alua", &target_core_alua_cit);
3150         hba_cg->default_groups[0] = &alua_group;
3151         hba_cg->default_groups[1] = NULL;
3152         /*
3153          * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3154          * groups under /sys/kernel/config/target/core/alua/
3155          */
3156         alua_cg = &alua_group;
3157         alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3158                         GFP_KERNEL);
3159         if (!alua_cg->default_groups) {
3160                 pr_err("Unable to allocate alua_cg->default_groups\n");
3161                 goto out_global;
3162         }
3163
3164         config_group_init_type_name(&alua_lu_gps_group,
3165                         "lu_gps", &target_core_alua_lu_gps_cit);
3166         alua_cg->default_groups[0] = &alua_lu_gps_group;
3167         alua_cg->default_groups[1] = NULL;
3168         /*
3169          * Add core/alua/lu_gps/default_lu_gp
3170          */
3171         lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3172         if (IS_ERR(lu_gp))
3173                 goto out_global;
3174
3175         lu_gp_cg = &alua_lu_gps_group;
3176         lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3177                         GFP_KERNEL);
3178         if (!lu_gp_cg->default_groups) {
3179                 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3180                 goto out_global;
3181         }
3182
3183         config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3184                                 &target_core_alua_lu_gp_cit);
3185         lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3186         lu_gp_cg->default_groups[1] = NULL;
3187         default_lu_gp = lu_gp;
3188         /*
3189          * Register the target_core_mod subsystem with configfs.
3190          */
3191         ret = configfs_register_subsystem(subsys);
3192         if (ret < 0) {
3193                 pr_err("Error %d while registering subsystem %s\n",
3194                         ret, subsys->su_group.cg_item.ci_namebuf);
3195                 goto out_global;
3196         }
3197         pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3198                 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3199                 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3200         /*
3201          * Register built-in RAMDISK subsystem logic for virtual LUN 0
3202          */
3203         ret = rd_module_init();
3204         if (ret < 0)
3205                 goto out;
3206
3207         if (core_dev_setup_virtual_lun0() < 0)
3208                 goto out;
3209
3210         return 0;
3211
3212 out:
3213         configfs_unregister_subsystem(subsys);
3214         core_dev_release_virtual_lun0();
3215         rd_module_exit();
3216 out_global:
3217         if (default_lu_gp) {
3218                 core_alua_free_lu_gp(default_lu_gp);
3219                 default_lu_gp = NULL;
3220         }
3221         if (lu_gp_cg)
3222                 kfree(lu_gp_cg->default_groups);
3223         if (alua_cg)
3224                 kfree(alua_cg->default_groups);
3225         if (hba_cg)
3226                 kfree(hba_cg->default_groups);
3227         kfree(target_cg->default_groups);
3228         release_se_kmem_caches();
3229         return ret;
3230 }
3231
3232 static void __exit target_core_exit_configfs(void)
3233 {
3234         struct configfs_subsystem *subsys;
3235         struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3236         struct config_item *item;
3237         int i;
3238
3239         subsys = target_core_subsystem[0];
3240
3241         lu_gp_cg = &alua_lu_gps_group;
3242         for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3243                 item = &lu_gp_cg->default_groups[i]->cg_item;
3244                 lu_gp_cg->default_groups[i] = NULL;
3245                 config_item_put(item);
3246         }
3247         kfree(lu_gp_cg->default_groups);
3248         lu_gp_cg->default_groups = NULL;
3249
3250         alua_cg = &alua_group;
3251         for (i = 0; alua_cg->default_groups[i]; i++) {
3252                 item = &alua_cg->default_groups[i]->cg_item;
3253                 alua_cg->default_groups[i] = NULL;
3254                 config_item_put(item);
3255         }
3256         kfree(alua_cg->default_groups);
3257         alua_cg->default_groups = NULL;
3258
3259         hba_cg = &target_core_hbagroup;
3260         for (i = 0; hba_cg->default_groups[i]; i++) {
3261                 item = &hba_cg->default_groups[i]->cg_item;
3262                 hba_cg->default_groups[i] = NULL;
3263                 config_item_put(item);
3264         }
3265         kfree(hba_cg->default_groups);
3266         hba_cg->default_groups = NULL;
3267         /*
3268          * We expect subsys->su_group.default_groups to be released
3269          * by configfs subsystem provider logic..
3270          */
3271         configfs_unregister_subsystem(subsys);
3272         kfree(subsys->su_group.default_groups);
3273
3274         core_alua_free_lu_gp(default_lu_gp);
3275         default_lu_gp = NULL;
3276
3277         pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3278                         " Infrastructure\n");
3279
3280         core_dev_release_virtual_lun0();
3281         rd_module_exit();
3282         release_se_kmem_caches();
3283 }
3284
3285 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3286 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3287 MODULE_LICENSE("GPL");
3288
3289 module_init(target_core_init_configfs);
3290 module_exit(target_core_exit_configfs);